* [PATCH v4 0/8] Raspberry Pi 4 PCIe support
@ 2019-12-03 11:47 ` Nicolas Saenz Julienne
0 siblings, 0 replies; 71+ messages in thread
From: Nicolas Saenz Julienne @ 2019-12-03 11:47 UTC (permalink / raw)
To: andrew.murray, maz, linux-kernel
Cc: james.quinlan, mbrugger, f.fainelli, phil, wahrenst,
jeremy.linton, linux-pci, linux-rpi-kernel,
Nicolas Saenz Julienne, Robin Murphy, linux-arm-kernel,
bcm-kernel-feedback-list, devicetree, linux-acpi, linux-clk,
linux-rdma, iommu, netdev, linux-rockchip, kexec, linux-nfs
This series aims at providing support for Raspberry Pi 4's PCIe
controller, which is also shared with the Broadcom STB family of
devices.
There was a previous attempt to upstream this some years ago[1] but was
blocked as most STB PCIe integrations have a sparse DMA mapping[2] which
is something currently not supported by the kernel. Luckily this is not
the case for the Raspberry Pi 4.
Note that the driver code is to be based on top of Rob Herring's series
simplifying inbound and outbound range parsing.
[1] https://patchwork.kernel.org/cover/10605933/
[2] https://patchwork.kernel.org/patch/10605957/
---
Changes since v3:
- Moved all the log2.h related changes at the end of the series, as I
presume they will be contentious and I don't want the PCIe patches
to depend on them. Ultimately I think I'll respin them on their own
series but wanted to keep them in for this submission just for the
sake of continuity.
- Addressed small nits here and there.
Changes since v2:
- Redo register access in driver avoiding indirection while keeping
the naming intact
- Add patch editing ARM64's config
- Last MSI cleanups, notably removing MSIX flag
- Got rid of all _RB writes
- Got rid of all of_data
- Overall churn removal
- Address the rest of Andrew's comments
Changes since v1:
- add generic rounddown/roundup_pow_two64() patch
- Add MAINTAINERS patch
- Fix Kconfig
- Cleanup probe, use up to date APIs, exit on MSI failure
- Get rid of linux,pci-domain and other unused constructs
- Use edge triggered setup for MSI
- Cleanup MSI implementation
- Fix multiple cosmetic issues
- Remove supend/resume code
Jim Quinlan (3):
dt-bindings: PCI: Add bindings for brcmstb's PCIe device
PCI: brcmstb: Add Broadcom STB PCIe host controller driver
PCI: brcmstb: Add MSI support
Nicolas Saenz Julienne (5):
ARM: dts: bcm2711: Enable PCIe controller
MAINTAINERS: Add brcmstb PCIe controller
arm64: defconfig: Enable Broadcom's STB PCIe controller
linux/log2.h: Fix 64bit calculations in roundup/down_pow_two()
linux/log2.h: Use roundup/dow_pow_two() on 64bit calculations
.../bindings/pci/brcm,stb-pcie.yaml | 97 ++
MAINTAINERS | 4 +
arch/arm/boot/dts/bcm2711.dtsi | 37 +
arch/arm64/configs/defconfig | 1 +
drivers/acpi/arm64/iort.c | 2 +-
drivers/clk/clk-divider.c | 8 +-
drivers/clk/sunxi/clk-sunxi.c | 2 +-
drivers/infiniband/hw/hfi1/chip.c | 4 +-
drivers/infiniband/hw/hfi1/init.c | 4 +-
drivers/infiniband/hw/mlx4/srq.c | 2 +-
drivers/infiniband/hw/mthca/mthca_srq.c | 2 +-
drivers/infiniband/sw/rxe/rxe_qp.c | 4 +-
drivers/iommu/intel-iommu.c | 4 +-
drivers/iommu/intel-svm.c | 4 +-
drivers/iommu/intel_irq_remapping.c | 2 +-
drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c | 4 +-
drivers/net/ethernet/marvell/sky2.c | 2 +-
drivers/net/ethernet/mellanox/mlx4/en_clock.c | 3 +-
drivers/net/ethernet/rocker/rocker_hw.h | 4 +-
drivers/net/ethernet/sfc/ef10.c | 2 +-
drivers/net/ethernet/sfc/efx.h | 2 +-
drivers/net/ethernet/sfc/falcon/efx.h | 2 +-
drivers/of/device.c | 3 +-
drivers/pci/controller/Kconfig | 9 +
drivers/pci/controller/Makefile | 1 +
.../pci/controller/cadence/pcie-cadence-ep.c | 3 +-
drivers/pci/controller/cadence/pcie-cadence.c | 3 +-
drivers/pci/controller/pcie-brcmstb.c | 1008 +++++++++++++++++
drivers/pci/controller/pcie-rockchip-ep.c | 5 +-
drivers/pci/msi.c | 2 +-
include/linux/log2.h | 44 +-
kernel/dma/direct.c | 2 +-
kernel/kexec_core.c | 3 +-
lib/rhashtable.c | 2 +-
net/sunrpc/xprtrdma/verbs.c | 2 +-
35 files changed, 1211 insertions(+), 72 deletions(-)
create mode 100644 Documentation/devicetree/bindings/pci/brcm,stb-pcie.yaml
create mode 100644 drivers/pci/controller/pcie-brcmstb.c
--
2.24.0
^ permalink raw reply [flat|nested] 71+ messages in thread
* [PATCH v4 0/8] Raspberry Pi 4 PCIe support
@ 2019-12-03 11:47 ` Nicolas Saenz Julienne
0 siblings, 0 replies; 71+ messages in thread
From: Nicolas Saenz Julienne @ 2019-12-03 11:47 UTC (permalink / raw)
To: andrew.murray, maz, linux-kernel
Cc: linux-arm-kernel, devicetree, linux-nfs, f.fainelli,
linux-rockchip, linux-rdma, linux-pci, phil, jeremy.linton,
kexec, linux-acpi, iommu, mbrugger, bcm-kernel-feedback-list,
wahrenst, james.quinlan, netdev, Robin Murphy, linux-clk,
Nicolas Saenz Julienne, linux-rpi-kernel
This series aims at providing support for Raspberry Pi 4's PCIe
controller, which is also shared with the Broadcom STB family of
devices.
There was a previous attempt to upstream this some years ago[1] but was
blocked as most STB PCIe integrations have a sparse DMA mapping[2] which
is something currently not supported by the kernel. Luckily this is not
the case for the Raspberry Pi 4.
Note that the driver code is to be based on top of Rob Herring's series
simplifying inbound and outbound range parsing.
[1] https://patchwork.kernel.org/cover/10605933/
[2] https://patchwork.kernel.org/patch/10605957/
---
Changes since v3:
- Moved all the log2.h related changes at the end of the series, as I
presume they will be contentious and I don't want the PCIe patches
to depend on them. Ultimately I think I'll respin them on their own
series but wanted to keep them in for this submission just for the
sake of continuity.
- Addressed small nits here and there.
Changes since v2:
- Redo register access in driver avoiding indirection while keeping
the naming intact
- Add patch editing ARM64's config
- Last MSI cleanups, notably removing MSIX flag
- Got rid of all _RB writes
- Got rid of all of_data
- Overall churn removal
- Address the rest of Andrew's comments
Changes since v1:
- add generic rounddown/roundup_pow_two64() patch
- Add MAINTAINERS patch
- Fix Kconfig
- Cleanup probe, use up to date APIs, exit on MSI failure
- Get rid of linux,pci-domain and other unused constructs
- Use edge triggered setup for MSI
- Cleanup MSI implementation
- Fix multiple cosmetic issues
- Remove supend/resume code
Jim Quinlan (3):
dt-bindings: PCI: Add bindings for brcmstb's PCIe device
PCI: brcmstb: Add Broadcom STB PCIe host controller driver
PCI: brcmstb: Add MSI support
Nicolas Saenz Julienne (5):
ARM: dts: bcm2711: Enable PCIe controller
MAINTAINERS: Add brcmstb PCIe controller
arm64: defconfig: Enable Broadcom's STB PCIe controller
linux/log2.h: Fix 64bit calculations in roundup/down_pow_two()
linux/log2.h: Use roundup/dow_pow_two() on 64bit calculations
.../bindings/pci/brcm,stb-pcie.yaml | 97 ++
MAINTAINERS | 4 +
arch/arm/boot/dts/bcm2711.dtsi | 37 +
arch/arm64/configs/defconfig | 1 +
drivers/acpi/arm64/iort.c | 2 +-
drivers/clk/clk-divider.c | 8 +-
drivers/clk/sunxi/clk-sunxi.c | 2 +-
drivers/infiniband/hw/hfi1/chip.c | 4 +-
drivers/infiniband/hw/hfi1/init.c | 4 +-
drivers/infiniband/hw/mlx4/srq.c | 2 +-
drivers/infiniband/hw/mthca/mthca_srq.c | 2 +-
drivers/infiniband/sw/rxe/rxe_qp.c | 4 +-
drivers/iommu/intel-iommu.c | 4 +-
drivers/iommu/intel-svm.c | 4 +-
drivers/iommu/intel_irq_remapping.c | 2 +-
drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c | 4 +-
drivers/net/ethernet/marvell/sky2.c | 2 +-
drivers/net/ethernet/mellanox/mlx4/en_clock.c | 3 +-
drivers/net/ethernet/rocker/rocker_hw.h | 4 +-
drivers/net/ethernet/sfc/ef10.c | 2 +-
drivers/net/ethernet/sfc/efx.h | 2 +-
drivers/net/ethernet/sfc/falcon/efx.h | 2 +-
drivers/of/device.c | 3 +-
drivers/pci/controller/Kconfig | 9 +
drivers/pci/controller/Makefile | 1 +
.../pci/controller/cadence/pcie-cadence-ep.c | 3 +-
drivers/pci/controller/cadence/pcie-cadence.c | 3 +-
drivers/pci/controller/pcie-brcmstb.c | 1008 +++++++++++++++++
drivers/pci/controller/pcie-rockchip-ep.c | 5 +-
drivers/pci/msi.c | 2 +-
include/linux/log2.h | 44 +-
kernel/dma/direct.c | 2 +-
kernel/kexec_core.c | 3 +-
lib/rhashtable.c | 2 +-
net/sunrpc/xprtrdma/verbs.c | 2 +-
35 files changed, 1211 insertions(+), 72 deletions(-)
create mode 100644 Documentation/devicetree/bindings/pci/brcm,stb-pcie.yaml
create mode 100644 drivers/pci/controller/pcie-brcmstb.c
--
2.24.0
_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu
^ permalink raw reply [flat|nested] 71+ messages in thread
* [PATCH v4 0/8] Raspberry Pi 4 PCIe support
@ 2019-12-03 11:47 ` Nicolas Saenz Julienne
0 siblings, 0 replies; 71+ messages in thread
From: Nicolas Saenz Julienne @ 2019-12-03 11:47 UTC (permalink / raw)
To: andrew.murray, maz, linux-kernel
Cc: linux-arm-kernel, devicetree, linux-nfs, f.fainelli,
linux-rockchip, linux-rdma, linux-pci, phil, jeremy.linton,
kexec, linux-acpi, iommu, mbrugger, bcm-kernel-feedback-list,
wahrenst, james.quinlan, netdev, Robin Murphy, linux-clk,
Nicolas Saenz Julienne, linux-rpi-kernel
This series aims at providing support for Raspberry Pi 4's PCIe
controller, which is also shared with the Broadcom STB family of
devices.
There was a previous attempt to upstream this some years ago[1] but was
blocked as most STB PCIe integrations have a sparse DMA mapping[2] which
is something currently not supported by the kernel. Luckily this is not
the case for the Raspberry Pi 4.
Note that the driver code is to be based on top of Rob Herring's series
simplifying inbound and outbound range parsing.
[1] https://patchwork.kernel.org/cover/10605933/
[2] https://patchwork.kernel.org/patch/10605957/
---
Changes since v3:
- Moved all the log2.h related changes at the end of the series, as I
presume they will be contentious and I don't want the PCIe patches
to depend on them. Ultimately I think I'll respin them on their own
series but wanted to keep them in for this submission just for the
sake of continuity.
- Addressed small nits here and there.
Changes since v2:
- Redo register access in driver avoiding indirection while keeping
the naming intact
- Add patch editing ARM64's config
- Last MSI cleanups, notably removing MSIX flag
- Got rid of all _RB writes
- Got rid of all of_data
- Overall churn removal
- Address the rest of Andrew's comments
Changes since v1:
- add generic rounddown/roundup_pow_two64() patch
- Add MAINTAINERS patch
- Fix Kconfig
- Cleanup probe, use up to date APIs, exit on MSI failure
- Get rid of linux,pci-domain and other unused constructs
- Use edge triggered setup for MSI
- Cleanup MSI implementation
- Fix multiple cosmetic issues
- Remove supend/resume code
Jim Quinlan (3):
dt-bindings: PCI: Add bindings for brcmstb's PCIe device
PCI: brcmstb: Add Broadcom STB PCIe host controller driver
PCI: brcmstb: Add MSI support
Nicolas Saenz Julienne (5):
ARM: dts: bcm2711: Enable PCIe controller
MAINTAINERS: Add brcmstb PCIe controller
arm64: defconfig: Enable Broadcom's STB PCIe controller
linux/log2.h: Fix 64bit calculations in roundup/down_pow_two()
linux/log2.h: Use roundup/dow_pow_two() on 64bit calculations
.../bindings/pci/brcm,stb-pcie.yaml | 97 ++
MAINTAINERS | 4 +
arch/arm/boot/dts/bcm2711.dtsi | 37 +
arch/arm64/configs/defconfig | 1 +
drivers/acpi/arm64/iort.c | 2 +-
drivers/clk/clk-divider.c | 8 +-
drivers/clk/sunxi/clk-sunxi.c | 2 +-
drivers/infiniband/hw/hfi1/chip.c | 4 +-
drivers/infiniband/hw/hfi1/init.c | 4 +-
drivers/infiniband/hw/mlx4/srq.c | 2 +-
drivers/infiniband/hw/mthca/mthca_srq.c | 2 +-
drivers/infiniband/sw/rxe/rxe_qp.c | 4 +-
drivers/iommu/intel-iommu.c | 4 +-
drivers/iommu/intel-svm.c | 4 +-
drivers/iommu/intel_irq_remapping.c | 2 +-
drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c | 4 +-
drivers/net/ethernet/marvell/sky2.c | 2 +-
drivers/net/ethernet/mellanox/mlx4/en_clock.c | 3 +-
drivers/net/ethernet/rocker/rocker_hw.h | 4 +-
drivers/net/ethernet/sfc/ef10.c | 2 +-
drivers/net/ethernet/sfc/efx.h | 2 +-
drivers/net/ethernet/sfc/falcon/efx.h | 2 +-
drivers/of/device.c | 3 +-
drivers/pci/controller/Kconfig | 9 +
drivers/pci/controller/Makefile | 1 +
.../pci/controller/cadence/pcie-cadence-ep.c | 3 +-
drivers/pci/controller/cadence/pcie-cadence.c | 3 +-
drivers/pci/controller/pcie-brcmstb.c | 1008 +++++++++++++++++
drivers/pci/controller/pcie-rockchip-ep.c | 5 +-
drivers/pci/msi.c | 2 +-
include/linux/log2.h | 44 +-
kernel/dma/direct.c | 2 +-
kernel/kexec_core.c | 3 +-
lib/rhashtable.c | 2 +-
net/sunrpc/xprtrdma/verbs.c | 2 +-
35 files changed, 1211 insertions(+), 72 deletions(-)
create mode 100644 Documentation/devicetree/bindings/pci/brcm,stb-pcie.yaml
create mode 100644 drivers/pci/controller/pcie-brcmstb.c
--
2.24.0
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply [flat|nested] 71+ messages in thread
* [PATCH v4 0/8] Raspberry Pi 4 PCIe support
@ 2019-12-03 11:47 ` Nicolas Saenz Julienne
0 siblings, 0 replies; 71+ messages in thread
From: Nicolas Saenz Julienne @ 2019-12-03 11:47 UTC (permalink / raw)
To: andrew.murray, maz, linux-kernel
Cc: linux-arm-kernel, devicetree, linux-nfs, f.fainelli,
linux-rockchip, linux-rdma, linux-pci, phil, jeremy.linton,
kexec, linux-acpi, iommu, mbrugger, bcm-kernel-feedback-list,
wahrenst, james.quinlan, netdev, Robin Murphy, linux-clk,
Nicolas Saenz Julienne, linux-rpi-kernel
This series aims at providing support for Raspberry Pi 4's PCIe
controller, which is also shared with the Broadcom STB family of
devices.
There was a previous attempt to upstream this some years ago[1] but was
blocked as most STB PCIe integrations have a sparse DMA mapping[2] which
is something currently not supported by the kernel. Luckily this is not
the case for the Raspberry Pi 4.
Note that the driver code is to be based on top of Rob Herring's series
simplifying inbound and outbound range parsing.
[1] https://patchwork.kernel.org/cover/10605933/
[2] https://patchwork.kernel.org/patch/10605957/
---
Changes since v3:
- Moved all the log2.h related changes at the end of the series, as I
presume they will be contentious and I don't want the PCIe patches
to depend on them. Ultimately I think I'll respin them on their own
series but wanted to keep them in for this submission just for the
sake of continuity.
- Addressed small nits here and there.
Changes since v2:
- Redo register access in driver avoiding indirection while keeping
the naming intact
- Add patch editing ARM64's config
- Last MSI cleanups, notably removing MSIX flag
- Got rid of all _RB writes
- Got rid of all of_data
- Overall churn removal
- Address the rest of Andrew's comments
Changes since v1:
- add generic rounddown/roundup_pow_two64() patch
- Add MAINTAINERS patch
- Fix Kconfig
- Cleanup probe, use up to date APIs, exit on MSI failure
- Get rid of linux,pci-domain and other unused constructs
- Use edge triggered setup for MSI
- Cleanup MSI implementation
- Fix multiple cosmetic issues
- Remove supend/resume code
Jim Quinlan (3):
dt-bindings: PCI: Add bindings for brcmstb's PCIe device
PCI: brcmstb: Add Broadcom STB PCIe host controller driver
PCI: brcmstb: Add MSI support
Nicolas Saenz Julienne (5):
ARM: dts: bcm2711: Enable PCIe controller
MAINTAINERS: Add brcmstb PCIe controller
arm64: defconfig: Enable Broadcom's STB PCIe controller
linux/log2.h: Fix 64bit calculations in roundup/down_pow_two()
linux/log2.h: Use roundup/dow_pow_two() on 64bit calculations
.../bindings/pci/brcm,stb-pcie.yaml | 97 ++
MAINTAINERS | 4 +
arch/arm/boot/dts/bcm2711.dtsi | 37 +
arch/arm64/configs/defconfig | 1 +
drivers/acpi/arm64/iort.c | 2 +-
drivers/clk/clk-divider.c | 8 +-
drivers/clk/sunxi/clk-sunxi.c | 2 +-
drivers/infiniband/hw/hfi1/chip.c | 4 +-
drivers/infiniband/hw/hfi1/init.c | 4 +-
drivers/infiniband/hw/mlx4/srq.c | 2 +-
drivers/infiniband/hw/mthca/mthca_srq.c | 2 +-
drivers/infiniband/sw/rxe/rxe_qp.c | 4 +-
drivers/iommu/intel-iommu.c | 4 +-
drivers/iommu/intel-svm.c | 4 +-
drivers/iommu/intel_irq_remapping.c | 2 +-
drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c | 4 +-
drivers/net/ethernet/marvell/sky2.c | 2 +-
drivers/net/ethernet/mellanox/mlx4/en_clock.c | 3 +-
drivers/net/ethernet/rocker/rocker_hw.h | 4 +-
drivers/net/ethernet/sfc/ef10.c | 2 +-
drivers/net/ethernet/sfc/efx.h | 2 +-
drivers/net/ethernet/sfc/falcon/efx.h | 2 +-
drivers/of/device.c | 3 +-
drivers/pci/controller/Kconfig | 9 +
drivers/pci/controller/Makefile | 1 +
.../pci/controller/cadence/pcie-cadence-ep.c | 3 +-
drivers/pci/controller/cadence/pcie-cadence.c | 3 +-
drivers/pci/controller/pcie-brcmstb.c | 1008 +++++++++++++++++
drivers/pci/controller/pcie-rockchip-ep.c | 5 +-
drivers/pci/msi.c | 2 +-
include/linux/log2.h | 44 +-
kernel/dma/direct.c | 2 +-
kernel/kexec_core.c | 3 +-
lib/rhashtable.c | 2 +-
net/sunrpc/xprtrdma/verbs.c | 2 +-
35 files changed, 1211 insertions(+), 72 deletions(-)
create mode 100644 Documentation/devicetree/bindings/pci/brcm,stb-pcie.yaml
create mode 100644 drivers/pci/controller/pcie-brcmstb.c
--
2.24.0
_______________________________________________
kexec mailing list
kexec@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/kexec
^ permalink raw reply [flat|nested] 71+ messages in thread
* [PATCH v4 1/8] dt-bindings: PCI: Add bindings for brcmstb's PCIe device
2019-12-03 11:47 ` Nicolas Saenz Julienne
@ 2019-12-03 11:47 ` Nicolas Saenz Julienne
-1 siblings, 0 replies; 71+ messages in thread
From: Nicolas Saenz Julienne @ 2019-12-03 11:47 UTC (permalink / raw)
To: andrew.murray, maz, linux-kernel, Florian Fainelli,
bcm-kernel-feedback-list, Eric Anholt, Stefan Wahren,
Bjorn Helgaas
Cc: james.quinlan, mbrugger, phil, jeremy.linton, linux-pci,
linux-rpi-kernel, Nicolas Saenz Julienne, Rob Herring,
Rob Herring, Mark Rutland, linux-arm-kernel, devicetree
From: Jim Quinlan <james.quinlan@broadcom.com>
The DT bindings description of the brcmstb PCIe device is described.
This node can only be used for now on the Raspberry Pi 4.
Signed-off-by: Jim Quinlan <james.quinlan@broadcom.com>
Co-developed-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
Reviewed-by: Rob Herring <robh@kernel.org>
---
Changes since v2:
- Add pci reference schema
- Drop all default properties
- Assume msi-controller and msi-parent are properly defined
- Add num entries on multiple properties
- use unevaluatedProperties
- Update required properties
- Fix license
Changes since v1:
- Fix commit Subject
- Remove linux,pci-domain
This was based on Jim's original submission[1], converted to yaml and
adapted to the RPi4 case.
[1] https://patchwork.kernel.org/patch/10605937/
.../bindings/pci/brcm,stb-pcie.yaml | 97 +++++++++++++++++++
1 file changed, 97 insertions(+)
create mode 100644 Documentation/devicetree/bindings/pci/brcm,stb-pcie.yaml
diff --git a/Documentation/devicetree/bindings/pci/brcm,stb-pcie.yaml b/Documentation/devicetree/bindings/pci/brcm,stb-pcie.yaml
new file mode 100644
index 000000000000..77d3e81a437b
--- /dev/null
+++ b/Documentation/devicetree/bindings/pci/brcm,stb-pcie.yaml
@@ -0,0 +1,97 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/pci/brcm,stb-pcie.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Brcmstb PCIe Host Controller Device Tree Bindings
+
+maintainers:
+ - Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
+
+allOf:
+ - $ref: /schemas/pci/pci-bus.yaml#
+
+properties:
+ compatible:
+ const: brcm,bcm2711-pcie # The Raspberry Pi 4
+
+ reg:
+ maxItems: 1
+
+ interrupts:
+ minItems: 1
+ maxItems: 2
+ items:
+ - description: PCIe host controller
+ - description: builtin MSI controller
+
+ interrupt-names:
+ minItems: 1
+ maxItems: 2
+ items:
+ - const: pcie
+ - const: msi
+
+ ranges:
+ maxItems: 1
+
+ dma-ranges:
+ maxItems: 1
+
+ clocks:
+ maxItems: 1
+
+ clock-names:
+ items:
+ - const: sw_pcie
+
+ msi-controller:
+ description: Identifies the node as an MSI controller.
+
+ msi-parent:
+ description: MSI controller the device is capable of using.
+
+ brcm,enable-ssc:
+ description: Indicates usage of spread-spectrum clocking.
+ type: boolean
+
+required:
+ - reg
+ - dma-ranges
+ - "#interrupt-cells"
+ - interrupts
+ - interrupt-names
+ - interrupt-map-mask
+ - interrupt-map
+ - msi-controller
+
+unevaluatedProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/interrupt-controller/irq.h>
+ #include <dt-bindings/interrupt-controller/arm-gic.h>
+
+ scb {
+ #address-cells = <2>;
+ #size-cells = <1>;
+ pcie0: pcie@7d500000 {
+ compatible = "brcm,bcm2711-pcie";
+ reg = <0x0 0x7d500000 0x9310>;
+ device_type = "pci";
+ #address-cells = <3>;
+ #size-cells = <2>;
+ #interrupt-cells = <1>;
+ interrupts = <GIC_SPI 148 IRQ_TYPE_LEVEL_HIGH>,
+ <GIC_SPI 148 IRQ_TYPE_LEVEL_HIGH>;
+ interrupt-names = "pcie", "msi";
+ interrupt-map-mask = <0x0 0x0 0x0 0x7>;
+ interrupt-map = <0 0 0 1 &gicv2 GIC_SPI 143 IRQ_TYPE_LEVEL_HIGH>;
+ msi-parent = <&pcie0>;
+ msi-controller;
+ ranges = <0x02000000 0x0 0xf8000000 0x6 0x00000000 0x0 0x04000000>;
+ dma-ranges = <0x02000000 0x0 0x00000000 0x0 0x00000000 0x0 0x80000000>;
+ brcm,enable-ssc;
+ };
+ };
--
2.24.0
^ permalink raw reply related [flat|nested] 71+ messages in thread
* [PATCH v4 1/8] dt-bindings: PCI: Add bindings for brcmstb's PCIe device
@ 2019-12-03 11:47 ` Nicolas Saenz Julienne
0 siblings, 0 replies; 71+ messages in thread
From: Nicolas Saenz Julienne @ 2019-12-03 11:47 UTC (permalink / raw)
To: andrew.murray, maz, linux-kernel, Florian Fainelli,
bcm-kernel-feedback-list, Eric Anholt, Stefan Wahren,
Bjorn Helgaas
Cc: Mark Rutland, Rob Herring, mbrugger, devicetree, linux-pci, phil,
jeremy.linton, Rob Herring, linux-rpi-kernel, james.quinlan,
Nicolas Saenz Julienne, linux-arm-kernel
From: Jim Quinlan <james.quinlan@broadcom.com>
The DT bindings description of the brcmstb PCIe device is described.
This node can only be used for now on the Raspberry Pi 4.
Signed-off-by: Jim Quinlan <james.quinlan@broadcom.com>
Co-developed-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
Reviewed-by: Rob Herring <robh@kernel.org>
---
Changes since v2:
- Add pci reference schema
- Drop all default properties
- Assume msi-controller and msi-parent are properly defined
- Add num entries on multiple properties
- use unevaluatedProperties
- Update required properties
- Fix license
Changes since v1:
- Fix commit Subject
- Remove linux,pci-domain
This was based on Jim's original submission[1], converted to yaml and
adapted to the RPi4 case.
[1] https://patchwork.kernel.org/patch/10605937/
.../bindings/pci/brcm,stb-pcie.yaml | 97 +++++++++++++++++++
1 file changed, 97 insertions(+)
create mode 100644 Documentation/devicetree/bindings/pci/brcm,stb-pcie.yaml
diff --git a/Documentation/devicetree/bindings/pci/brcm,stb-pcie.yaml b/Documentation/devicetree/bindings/pci/brcm,stb-pcie.yaml
new file mode 100644
index 000000000000..77d3e81a437b
--- /dev/null
+++ b/Documentation/devicetree/bindings/pci/brcm,stb-pcie.yaml
@@ -0,0 +1,97 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/pci/brcm,stb-pcie.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Brcmstb PCIe Host Controller Device Tree Bindings
+
+maintainers:
+ - Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
+
+allOf:
+ - $ref: /schemas/pci/pci-bus.yaml#
+
+properties:
+ compatible:
+ const: brcm,bcm2711-pcie # The Raspberry Pi 4
+
+ reg:
+ maxItems: 1
+
+ interrupts:
+ minItems: 1
+ maxItems: 2
+ items:
+ - description: PCIe host controller
+ - description: builtin MSI controller
+
+ interrupt-names:
+ minItems: 1
+ maxItems: 2
+ items:
+ - const: pcie
+ - const: msi
+
+ ranges:
+ maxItems: 1
+
+ dma-ranges:
+ maxItems: 1
+
+ clocks:
+ maxItems: 1
+
+ clock-names:
+ items:
+ - const: sw_pcie
+
+ msi-controller:
+ description: Identifies the node as an MSI controller.
+
+ msi-parent:
+ description: MSI controller the device is capable of using.
+
+ brcm,enable-ssc:
+ description: Indicates usage of spread-spectrum clocking.
+ type: boolean
+
+required:
+ - reg
+ - dma-ranges
+ - "#interrupt-cells"
+ - interrupts
+ - interrupt-names
+ - interrupt-map-mask
+ - interrupt-map
+ - msi-controller
+
+unevaluatedProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/interrupt-controller/irq.h>
+ #include <dt-bindings/interrupt-controller/arm-gic.h>
+
+ scb {
+ #address-cells = <2>;
+ #size-cells = <1>;
+ pcie0: pcie@7d500000 {
+ compatible = "brcm,bcm2711-pcie";
+ reg = <0x0 0x7d500000 0x9310>;
+ device_type = "pci";
+ #address-cells = <3>;
+ #size-cells = <2>;
+ #interrupt-cells = <1>;
+ interrupts = <GIC_SPI 148 IRQ_TYPE_LEVEL_HIGH>,
+ <GIC_SPI 148 IRQ_TYPE_LEVEL_HIGH>;
+ interrupt-names = "pcie", "msi";
+ interrupt-map-mask = <0x0 0x0 0x0 0x7>;
+ interrupt-map = <0 0 0 1 &gicv2 GIC_SPI 143 IRQ_TYPE_LEVEL_HIGH>;
+ msi-parent = <&pcie0>;
+ msi-controller;
+ ranges = <0x02000000 0x0 0xf8000000 0x6 0x00000000 0x0 0x04000000>;
+ dma-ranges = <0x02000000 0x0 0x00000000 0x0 0x00000000 0x0 0x80000000>;
+ brcm,enable-ssc;
+ };
+ };
--
2.24.0
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply related [flat|nested] 71+ messages in thread
* [PATCH v4 2/8] ARM: dts: bcm2711: Enable PCIe controller
2019-12-03 11:47 ` Nicolas Saenz Julienne
@ 2019-12-03 11:47 ` Nicolas Saenz Julienne
-1 siblings, 0 replies; 71+ messages in thread
From: Nicolas Saenz Julienne @ 2019-12-03 11:47 UTC (permalink / raw)
To: andrew.murray, maz, linux-kernel, Rob Herring, Mark Rutland,
Eric Anholt, Stefan Wahren
Cc: james.quinlan, mbrugger, f.fainelli, phil, jeremy.linton,
linux-pci, linux-rpi-kernel, Nicolas Saenz Julienne, devicetree,
bcm-kernel-feedback-list, linux-arm-kernel
This enables bcm2711's PCIe bus, which is hardwired to a VIA
Technologies XHCI USB 3.0 controller.
Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
---
Changes since v3:
- Remove unwarranted comment
Changes since v2:
- Remove unused interrupt-map
- correct dma-ranges to it's full size, non power of 2 bus DMA
constraints now supported in linux-next[1]
- add device_type
- rename alias from pcie_0 to pcie0
Changes since v1:
- remove linux,pci-domain
arch/arm/boot/dts/bcm2711.dtsi | 37 ++++++++++++++++++++++++++++++++++
1 file changed, 37 insertions(+)
diff --git a/arch/arm/boot/dts/bcm2711.dtsi b/arch/arm/boot/dts/bcm2711.dtsi
index 667658497898..5b61cd915f2b 100644
--- a/arch/arm/boot/dts/bcm2711.dtsi
+++ b/arch/arm/boot/dts/bcm2711.dtsi
@@ -288,6 +288,43 @@ IRQ_TYPE_LEVEL_LOW)>,
arm,cpu-registers-not-fw-configured;
};
+ scb {
+ compatible = "simple-bus";
+ #address-cells = <2>;
+ #size-cells = <1>;
+
+ ranges = <0x0 0x7c000000 0x0 0xfc000000 0x03800000>,
+ <0x6 0x00000000 0x6 0x00000000 0x40000000>;
+
+ pcie0: pcie@7d500000 {
+ compatible = "brcm,bcm2711-pcie";
+ reg = <0x0 0x7d500000 0x9310>;
+ device_type = "pci";
+ #address-cells = <3>;
+ #interrupt-cells = <1>;
+ #size-cells = <2>;
+ interrupts = <GIC_SPI 148 IRQ_TYPE_LEVEL_HIGH>,
+ <GIC_SPI 148 IRQ_TYPE_LEVEL_HIGH>;
+ interrupt-names = "pcie", "msi";
+ interrupt-map-mask = <0x0 0x0 0x0 0x7>;
+ interrupt-map = <0 0 0 1 &gicv2 GIC_SPI 143
+ IRQ_TYPE_LEVEL_HIGH>;
+ msi-controller;
+ msi-parent = <&pcie0>;
+
+ ranges = <0x02000000 0x0 0xf8000000 0x6 0x00000000
+ 0x0 0x04000000>;
+ /*
+ * The wrapper around the PCIe block has a bug
+ * preventing it from accessing beyond the first 3GB of
+ * memory.
+ */
+ dma-ranges = <0x02000000 0x0 0x00000000 0x0 0x00000000
+ 0x0 0xc0000000>;
+ brcm,enable-ssc;
+ };
+ };
+
cpus: cpus {
#address-cells = <1>;
#size-cells = <0>;
--
2.24.0
^ permalink raw reply related [flat|nested] 71+ messages in thread
* [PATCH v4 2/8] ARM: dts: bcm2711: Enable PCIe controller
@ 2019-12-03 11:47 ` Nicolas Saenz Julienne
0 siblings, 0 replies; 71+ messages in thread
From: Nicolas Saenz Julienne @ 2019-12-03 11:47 UTC (permalink / raw)
To: andrew.murray, maz, linux-kernel, Rob Herring, Mark Rutland,
Eric Anholt, Stefan Wahren
Cc: linux-arm-kernel, devicetree, f.fainelli, linux-pci, phil,
jeremy.linton, mbrugger, bcm-kernel-feedback-list,
linux-rpi-kernel, james.quinlan, Nicolas Saenz Julienne
This enables bcm2711's PCIe bus, which is hardwired to a VIA
Technologies XHCI USB 3.0 controller.
Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
---
Changes since v3:
- Remove unwarranted comment
Changes since v2:
- Remove unused interrupt-map
- correct dma-ranges to it's full size, non power of 2 bus DMA
constraints now supported in linux-next[1]
- add device_type
- rename alias from pcie_0 to pcie0
Changes since v1:
- remove linux,pci-domain
arch/arm/boot/dts/bcm2711.dtsi | 37 ++++++++++++++++++++++++++++++++++
1 file changed, 37 insertions(+)
diff --git a/arch/arm/boot/dts/bcm2711.dtsi b/arch/arm/boot/dts/bcm2711.dtsi
index 667658497898..5b61cd915f2b 100644
--- a/arch/arm/boot/dts/bcm2711.dtsi
+++ b/arch/arm/boot/dts/bcm2711.dtsi
@@ -288,6 +288,43 @@ IRQ_TYPE_LEVEL_LOW)>,
arm,cpu-registers-not-fw-configured;
};
+ scb {
+ compatible = "simple-bus";
+ #address-cells = <2>;
+ #size-cells = <1>;
+
+ ranges = <0x0 0x7c000000 0x0 0xfc000000 0x03800000>,
+ <0x6 0x00000000 0x6 0x00000000 0x40000000>;
+
+ pcie0: pcie@7d500000 {
+ compatible = "brcm,bcm2711-pcie";
+ reg = <0x0 0x7d500000 0x9310>;
+ device_type = "pci";
+ #address-cells = <3>;
+ #interrupt-cells = <1>;
+ #size-cells = <2>;
+ interrupts = <GIC_SPI 148 IRQ_TYPE_LEVEL_HIGH>,
+ <GIC_SPI 148 IRQ_TYPE_LEVEL_HIGH>;
+ interrupt-names = "pcie", "msi";
+ interrupt-map-mask = <0x0 0x0 0x0 0x7>;
+ interrupt-map = <0 0 0 1 &gicv2 GIC_SPI 143
+ IRQ_TYPE_LEVEL_HIGH>;
+ msi-controller;
+ msi-parent = <&pcie0>;
+
+ ranges = <0x02000000 0x0 0xf8000000 0x6 0x00000000
+ 0x0 0x04000000>;
+ /*
+ * The wrapper around the PCIe block has a bug
+ * preventing it from accessing beyond the first 3GB of
+ * memory.
+ */
+ dma-ranges = <0x02000000 0x0 0x00000000 0x0 0x00000000
+ 0x0 0xc0000000>;
+ brcm,enable-ssc;
+ };
+ };
+
cpus: cpus {
#address-cells = <1>;
#size-cells = <0>;
--
2.24.0
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply related [flat|nested] 71+ messages in thread
* [PATCH v4 3/8] PCI: brcmstb: Add Broadcom STB PCIe host controller driver
2019-12-03 11:47 ` Nicolas Saenz Julienne
@ 2019-12-03 11:47 ` Nicolas Saenz Julienne
-1 siblings, 0 replies; 71+ messages in thread
From: Nicolas Saenz Julienne @ 2019-12-03 11:47 UTC (permalink / raw)
To: andrew.murray, maz, linux-kernel, Lorenzo Pieralisi,
Florian Fainelli, bcm-kernel-feedback-list, Eric Anholt,
Stefan Wahren
Cc: james.quinlan, mbrugger, phil, jeremy.linton, linux-pci,
linux-rpi-kernel, Nicolas Saenz Julienne, Bjorn Helgaas,
linux-arm-kernel
From: Jim Quinlan <james.quinlan@broadcom.com>
This adds a basic driver for Broadcom's STB PCIe controller, for now
aimed at Raspberry Pi 4's SoC, bcm2711.
Signed-off-by: Jim Quinlan <james.quinlan@broadcom.com>
Co-developed-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
Reviewed-by: Andrew Murray <andrew.murray@arm.com>
---
Changes since v3:
- Update commit message
- rollback roundup_pow_two usage, it'll be updated later down the line
- Remove comment in register definition
Changes since v2:
- Correct rc_bar2_offset sign
- Invert IRQ clear and masking in setup code
- Use bitfield.h, redo all register ops while keeping the register
names intact
- Remove all SHIFT register definitions
- Get rid of all _RB writes
- Get rid of of_data
- Don't iterate over inexisting dma-ranges
- Add comment regarding dma-ranges validation
- Small cosmetic cleanups
- Fix license mismatch
- Set driver Kconfig tristate
- Didn't add any comment about the controller not being I/O coherent
for now as I wait for Jeremy's reply
Changes since v1:
- Fix Kconfig
- Remove pci domain check
- Remove all MSI related code
- Remove supend/resume code
- Simplify link state wait routine
- Prefix all functions
- Use of_device_get_match_data()
- Use devm_clk_get_optional()
- Get rid of irq variable
- Use STB all over the driver
- Simplify map_bus() function
- Fix license mismatch
- Remove unused register definitions
- Small cleanups, spell errors
This is based on Jim's original submission[1] but adapted and tailored
specifically to bcm2711's needs (that's the Raspberry Pi 4). Support for
the rest of the brcmstb family will soon follow once we get support for
multiple dma-ranges in dma/direct.
[1] https://patchwork.kernel.org/patch/10605959/
drivers/pci/controller/Kconfig | 8 +
drivers/pci/controller/Makefile | 1 +
drivers/pci/controller/pcie-brcmstb.c | 748 ++++++++++++++++++++++++++
3 files changed, 757 insertions(+)
create mode 100644 drivers/pci/controller/pcie-brcmstb.c
diff --git a/drivers/pci/controller/Kconfig b/drivers/pci/controller/Kconfig
index c77069c8ee5d..27504f108ee5 100644
--- a/drivers/pci/controller/Kconfig
+++ b/drivers/pci/controller/Kconfig
@@ -253,6 +253,14 @@ config VMD
To compile this driver as a module, choose M here: the
module will be called vmd.
+config PCIE_BRCMSTB
+ tristate "Broadcom Brcmstb PCIe host controller"
+ depends on ARCH_BCM2835 || COMPILE_TEST
+ depends on OF
+ help
+ Say Y here to enable PCIe host controller support for
+ Broadcom STB based SoCs, like the Raspberry Pi 4.
+
config PCI_HYPERV_INTERFACE
tristate "Hyper-V PCI Interface"
depends on X86 && HYPERV && PCI_MSI && PCI_MSI_IRQ_DOMAIN && X86_64
diff --git a/drivers/pci/controller/Makefile b/drivers/pci/controller/Makefile
index 3d4f597f15ce..01b2502a5323 100644
--- a/drivers/pci/controller/Makefile
+++ b/drivers/pci/controller/Makefile
@@ -28,6 +28,7 @@ obj-$(CONFIG_PCIE_MEDIATEK) += pcie-mediatek.o
obj-$(CONFIG_PCIE_MOBIVEIL) += pcie-mobiveil.o
obj-$(CONFIG_PCIE_TANGO_SMP8759) += pcie-tango.o
obj-$(CONFIG_VMD) += vmd.o
+obj-$(CONFIG_PCIE_BRCMSTB) += pcie-brcmstb.o
# pcie-hisi.o quirks are needed even without CONFIG_PCIE_DW
obj-y += dwc/
diff --git a/drivers/pci/controller/pcie-brcmstb.c b/drivers/pci/controller/pcie-brcmstb.c
new file mode 100644
index 000000000000..dd681164faa0
--- /dev/null
+++ b/drivers/pci/controller/pcie-brcmstb.c
@@ -0,0 +1,748 @@
+// SPDX-License-Identifier: GPL-2.0+
+/* Copyright (C) 2009 - 2019 Broadcom */
+
+#include <linux/bitfield.h>
+#include <linux/clk.h>
+#include <linux/compiler.h>
+#include <linux/delay.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/ioport.h>
+#include <linux/irqdomain.h>
+#include <linux/kernel.h>
+#include <linux/list.h>
+#include <linux/log2.h>
+#include <linux/module.h>
+#include <linux/of_address.h>
+#include <linux/of_irq.h>
+#include <linux/of_pci.h>
+#include <linux/of_platform.h>
+#include <linux/pci.h>
+#include <linux/printk.h>
+#include <linux/sizes.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+#include <linux/types.h>
+
+#include "../pci.h"
+
+/* BRCM_PCIE_CAP_REGS - Offset for the mandatory capability config regs */
+#define BRCM_PCIE_CAP_REGS 0x00ac
+
+/* Broadcom STB PCIe Register Offsets */
+#define PCIE_RC_CFG_VENDOR_VENDOR_SPECIFIC_REG1 0x0188
+#define PCIE_RC_CFG_VENDOR_VENDOR_SPECIFIC_REG1_ENDIAN_MODE_BAR2_MASK 0xc
+#define PCIE_RC_CFG_VENDOR_SPCIFIC_REG1_LITTLE_ENDIAN 0x0
+
+#define PCIE_RC_CFG_PRIV1_ID_VAL3 0x043c
+#define PCIE_RC_CFG_PRIV1_ID_VAL3_CLASS_CODE_MASK 0xffffff
+
+#define PCIE_RC_DL_MDIO_ADDR 0x1100
+#define PCIE_RC_DL_MDIO_WR_DATA 0x1104
+#define PCIE_RC_DL_MDIO_RD_DATA 0x1108
+
+#define PCIE_MISC_MISC_CTRL 0x4008
+#define PCIE_MISC_MISC_CTRL_SCB_ACCESS_EN_MASK 0x1000
+#define PCIE_MISC_MISC_CTRL_CFG_READ_UR_MODE_MASK 0x2000
+#define PCIE_MISC_MISC_CTRL_MAX_BURST_SIZE_MASK 0x300000
+#define PCIE_MISC_MISC_CTRL_MAX_BURST_SIZE_128 0x0
+#define PCIE_MISC_MISC_CTRL_SCB0_SIZE_MASK 0xf8000000
+
+#define PCIE_MISC_CPU_2_PCIE_MEM_WIN0_LO 0x400c
+#define PCIE_MEM_WIN0_LO(win) \
+ PCIE_MISC_CPU_2_PCIE_MEM_WIN0_LO + ((win) * 4)
+
+#define PCIE_MISC_CPU_2_PCIE_MEM_WIN0_HI 0x4010
+#define PCIE_MEM_WIN0_HI(win) \
+ PCIE_MISC_CPU_2_PCIE_MEM_WIN0_HI + ((win) * 4)
+
+#define PCIE_MISC_RC_BAR1_CONFIG_LO 0x402c
+#define PCIE_MISC_RC_BAR1_CONFIG_LO_SIZE_MASK 0x1f
+
+#define PCIE_MISC_RC_BAR2_CONFIG_LO 0x4034
+#define PCIE_MISC_RC_BAR2_CONFIG_LO_SIZE_MASK 0x1f
+#define PCIE_MISC_RC_BAR2_CONFIG_HI 0x4038
+
+#define PCIE_MISC_RC_BAR3_CONFIG_LO 0x403c
+#define PCIE_MISC_RC_BAR3_CONFIG_LO_SIZE_MASK 0x1f
+
+#define PCIE_MISC_PCIE_CTRL 0x4064
+#define PCIE_MISC_PCIE_CTRL_PCIE_L23_REQUEST_MASK 0x1
+
+#define PCIE_MISC_PCIE_STATUS 0x4068
+#define PCIE_MISC_PCIE_STATUS_PCIE_PORT_MASK 0x80
+#define PCIE_MISC_PCIE_STATUS_PCIE_DL_ACTIVE_MASK 0x20
+#define PCIE_MISC_PCIE_STATUS_PCIE_PHYLINKUP_MASK 0x10
+#define PCIE_MISC_PCIE_STATUS_PCIE_LINK_IN_L23_MASK 0x40
+
+#define PCIE_MISC_CPU_2_PCIE_MEM_WIN0_BASE_LIMIT 0x4070
+#define PCIE_MISC_CPU_2_PCIE_MEM_WIN0_BASE_LIMIT_LIMIT_MASK 0xfff00000
+#define PCIE_MISC_CPU_2_PCIE_MEM_WIN0_BASE_LIMIT_BASE_MASK 0xfff0
+#define PCIE_MEM_WIN0_BASE_LIMIT(win) \
+ PCIE_MISC_CPU_2_PCIE_MEM_WIN0_BASE_LIMIT + ((win) * 4)
+
+#define PCIE_MISC_CPU_2_PCIE_MEM_WIN0_BASE_HI 0x4080
+#define PCIE_MISC_CPU_2_PCIE_MEM_WIN0_BASE_HI_BASE_MASK 0xff
+#define PCIE_MEM_WIN0_BASE_HI(win) \
+ PCIE_MISC_CPU_2_PCIE_MEM_WIN0_BASE_HI + ((win) * 8)
+
+#define PCIE_MISC_CPU_2_PCIE_MEM_WIN0_LIMIT_HI 0x4084
+#define PCIE_MISC_CPU_2_PCIE_MEM_WIN0_LIMIT_HI_LIMIT_MASK 0xff
+#define PCIE_MEM_WIN0_LIMIT_HI(win) \
+ PCIE_MISC_CPU_2_PCIE_MEM_WIN0_LIMIT_HI + ((win) * 8)
+
+#define PCIE_MISC_HARD_PCIE_HARD_DEBUG 0x4204
+#define PCIE_MISC_HARD_PCIE_HARD_DEBUG_CLKREQ_DEBUG_ENABLE_MASK 0x2
+#define PCIE_MISC_HARD_PCIE_HARD_DEBUG_SERDES_IDDQ_MASK 0x08000000
+
+#define PCIE_MSI_INTR2_STATUS 0x4500
+#define PCIE_MSI_INTR2_CLR 0x4508
+#define PCIE_MSI_INTR2_MASK_SET 0x4510
+#define PCIE_MSI_INTR2_MASK_CLR 0x4514
+
+#define PCIE_EXT_CFG_DATA 0x8000
+
+#define PCIE_EXT_CFG_INDEX 0x9000
+#define PCIE_EXT_BUSNUM_SHIFT 20
+#define PCIE_EXT_SLOT_SHIFT 15
+#define PCIE_EXT_FUNC_SHIFT 12
+
+#define PCIE_RGR1_SW_INIT_1 0x9210
+#define PCIE_RGR1_SW_INIT_1_PERST_MASK 0x1
+#define PCIE_RGR1_SW_INIT_1_INIT_MASK 0x2
+
+/* PCIe parameters */
+#define BRCM_NUM_PCIE_OUT_WINS 0x4
+
+/* MDIO registers */
+#define MDIO_PORT0 0x0
+#define MDIO_DATA_MASK 0x7fffffff
+#define MDIO_PORT_MASK 0xf0000
+#define MDIO_REGAD_MASK 0xffff
+#define MDIO_CMD_MASK 0xfff00000
+#define MDIO_CMD_READ 0x1
+#define MDIO_CMD_WRITE 0x0
+#define MDIO_DATA_DONE_MASK 0x80000000
+#define MDIO_RD_DONE(x) (((x) & MDIO_DATA_DONE_MASK) ? 1 : 0)
+#define MDIO_WT_DONE(x) (((x) & MDIO_DATA_DONE_MASK) ? 0 : 1)
+#define SSC_REGS_ADDR 0x1100
+#define SET_ADDR_OFFSET 0x1f
+#define SSC_CNTL_OFFSET 0x2
+#define SSC_CNTL_OVRD_EN_MASK 0x8000
+#define SSC_CNTL_OVRD_VAL_MASK 0x4000
+#define SSC_STATUS_OFFSET 0x1
+#define SSC_STATUS_SSC_MASK 0x400
+#define SSC_STATUS_PLL_LOCK_MASK 0x800
+
+/* Internal PCIe Host Controller Information.*/
+struct brcm_pcie {
+ struct device *dev;
+ void __iomem *base;
+ struct clk *clk;
+ struct pci_bus *root_bus;
+ struct device_node *np;
+ bool ssc;
+ int gen;
+};
+
+/*
+ * This is to convert the size of the inbound "BAR" region to the
+ * non-linear values of PCIE_X_MISC_RC_BAR[123]_CONFIG_LO.SIZE
+ */
+static int brcm_pcie_encode_ibar_size(u64 size)
+{
+ int log2_in = ilog2(size);
+
+ if (log2_in >= 12 && log2_in <= 15)
+ /* Covers 4KB to 32KB (inclusive) */
+ return (log2_in - 12) + 0x1c;
+ else if (log2_in >= 16 && log2_in <= 35)
+ /* Covers 64KB to 32GB, (inclusive) */
+ return log2_in - 15;
+ /* Something is awry so disable */
+ return 0;
+}
+
+static u32 brcm_pcie_mdio_form_pkt(int port, int regad, int cmd)
+{
+ u32 pkt = 0;
+
+ pkt |= FIELD_PREP(MDIO_PORT_MASK, port);
+ pkt |= FIELD_PREP(MDIO_REGAD_MASK, regad);
+ pkt |= FIELD_PREP(MDIO_CMD_MASK, cmd);
+
+ return pkt;
+}
+
+/* negative return value indicates error */
+static int brcm_pcie_mdio_read(void __iomem *base, u8 port, u8 regad, u32 *val)
+{
+ int tries;
+ u32 data;
+
+ writel(brcm_pcie_mdio_form_pkt(port, regad, MDIO_CMD_READ),
+ base + PCIE_RC_DL_MDIO_ADDR);
+ readl(base + PCIE_RC_DL_MDIO_ADDR);
+
+ data = readl(base + PCIE_RC_DL_MDIO_RD_DATA);
+ for (tries = 0; !MDIO_RD_DONE(data) && tries < 10; tries++) {
+ udelay(10);
+ data = readl(base + PCIE_RC_DL_MDIO_RD_DATA);
+ }
+
+ *val = FIELD_GET(MDIO_DATA_MASK, data);
+ return MDIO_RD_DONE(data) ? 0 : -EIO;
+}
+
+/* negative return value indicates error */
+static int brcm_pcie_mdio_write(void __iomem *base, u8 port,
+ u8 regad, u16 wrdata)
+{
+ int tries;
+ u32 data;
+
+ writel(brcm_pcie_mdio_form_pkt(port, regad, MDIO_CMD_WRITE),
+ base + PCIE_RC_DL_MDIO_ADDR);
+ readl(base + PCIE_RC_DL_MDIO_ADDR);
+ writel(MDIO_DATA_DONE_MASK | wrdata, base + PCIE_RC_DL_MDIO_WR_DATA);
+
+ data = readl(base + PCIE_RC_DL_MDIO_WR_DATA);
+ for (tries = 0; !MDIO_WT_DONE(data) && tries < 10; tries++) {
+ udelay(10);
+ data = readl(base + PCIE_RC_DL_MDIO_WR_DATA);
+ }
+
+ return MDIO_WT_DONE(data) ? 0 : -EIO;
+}
+
+/*
+ * Configures device for Spread Spectrum Clocking (SSC) mode; a negative
+ * return value indicates error.
+ */
+static int brcm_pcie_set_ssc(struct brcm_pcie *pcie)
+{
+ int pll, ssc;
+ int ret;
+ u32 tmp;
+
+ ret = brcm_pcie_mdio_write(pcie->base, MDIO_PORT0, SET_ADDR_OFFSET,
+ SSC_REGS_ADDR);
+ if (ret < 0)
+ return ret;
+
+ ret = brcm_pcie_mdio_read(pcie->base, MDIO_PORT0,
+ SSC_CNTL_OFFSET, &tmp);
+ if (ret < 0)
+ return ret;
+
+ u32p_replace_bits(&tmp, 1, SSC_CNTL_OVRD_EN_MASK);
+ u32p_replace_bits(&tmp, 1, SSC_CNTL_OVRD_VAL_MASK);
+ ret = brcm_pcie_mdio_write(pcie->base, MDIO_PORT0,
+ SSC_CNTL_OFFSET, tmp);
+ if (ret < 0)
+ return ret;
+
+ usleep_range(1000, 2000);
+ ret = brcm_pcie_mdio_read(pcie->base, MDIO_PORT0,
+ SSC_STATUS_OFFSET, &tmp);
+ if (ret < 0)
+ return ret;
+
+ ssc = FIELD_GET(SSC_STATUS_SSC_MASK, tmp);
+ pll = FIELD_GET(SSC_STATUS_PLL_LOCK_MASK, tmp);
+
+ return ssc && pll ? 0 : -EIO;
+}
+
+/* Limits operation to a specific generation (1, 2, or 3) */
+static void brcm_pcie_set_gen(struct brcm_pcie *pcie, int gen)
+{
+ u16 lnkctl2 = readw(pcie->base + BRCM_PCIE_CAP_REGS + PCI_EXP_LNKCTL2);
+ u32 lnkcap = readl(pcie->base + BRCM_PCIE_CAP_REGS + PCI_EXP_LNKCAP);
+
+ lnkcap = (lnkcap & ~PCI_EXP_LNKCAP_SLS) | gen;
+ writel(lnkcap, pcie->base + BRCM_PCIE_CAP_REGS + PCI_EXP_LNKCAP);
+
+ lnkctl2 = (lnkctl2 & ~0xf) | gen;
+ writew(lnkctl2, pcie->base + BRCM_PCIE_CAP_REGS + PCI_EXP_LNKCTL2);
+}
+
+static void brcm_pcie_set_outbound_win(struct brcm_pcie *pcie,
+ unsigned int win, u64 cpu_addr,
+ u64 pcie_addr, u64 size)
+{
+ u32 cpu_addr_mb_high, limit_addr_mb_high;
+ phys_addr_t cpu_addr_mb, limit_addr_mb;
+ int high_addr_shift;
+ u32 tmp;
+
+ /* Set the base of the pcie_addr window */
+ writel(lower_32_bits(pcie_addr), pcie->base + PCIE_MEM_WIN0_LO(win));
+ writel(upper_32_bits(pcie_addr), pcie->base + PCIE_MEM_WIN0_HI(win));
+
+ /* Write the addr base & limit lower bits (in MBs) */
+ cpu_addr_mb = cpu_addr / SZ_1M;
+ limit_addr_mb = (cpu_addr + size - 1) / SZ_1M;
+
+ tmp = readl(pcie->base + PCIE_MEM_WIN0_BASE_LIMIT(win));
+ u32p_replace_bits(&tmp, cpu_addr_mb,
+ PCIE_MISC_CPU_2_PCIE_MEM_WIN0_BASE_LIMIT_BASE_MASK);
+ u32p_replace_bits(&tmp, limit_addr_mb,
+ PCIE_MISC_CPU_2_PCIE_MEM_WIN0_BASE_LIMIT_LIMIT_MASK);
+ writel(tmp, pcie->base + PCIE_MEM_WIN0_BASE_LIMIT(win));
+
+ /* Write the cpu & limit addr upper bits */
+ high_addr_shift =
+ HWEIGHT32(PCIE_MISC_CPU_2_PCIE_MEM_WIN0_BASE_LIMIT_BASE_MASK);
+
+ cpu_addr_mb_high = cpu_addr_mb >> high_addr_shift;
+ tmp = readl(pcie->base + PCIE_MEM_WIN0_BASE_HI(win));
+ u32p_replace_bits(&tmp, cpu_addr_mb_high,
+ PCIE_MISC_CPU_2_PCIE_MEM_WIN0_BASE_HI_BASE_MASK);
+ writel(tmp, pcie->base + PCIE_MEM_WIN0_BASE_HI(win));
+
+ limit_addr_mb_high = limit_addr_mb >> high_addr_shift;
+ tmp = readl(pcie->base + PCIE_MEM_WIN0_LIMIT_HI(win));
+ u32p_replace_bits(&tmp, limit_addr_mb_high,
+ PCIE_MISC_CPU_2_PCIE_MEM_WIN0_LIMIT_HI_LIMIT_MASK);
+ writel(tmp, pcie->base + PCIE_MEM_WIN0_LIMIT_HI(win));
+}
+
+/* The controller is capable of serving in both RC and EP roles */
+static bool brcm_pcie_rc_mode(struct brcm_pcie *pcie)
+{
+ void __iomem *base = pcie->base;
+ u32 val = readl(base + PCIE_MISC_PCIE_STATUS);
+
+ return !!FIELD_GET(PCIE_MISC_PCIE_STATUS_PCIE_PORT_MASK, val);
+}
+
+static bool brcm_pcie_link_up(struct brcm_pcie *pcie)
+{
+ u32 val = readl(pcie->base + PCIE_MISC_PCIE_STATUS);
+ u32 dla = FIELD_GET(PCIE_MISC_PCIE_STATUS_PCIE_DL_ACTIVE_MASK, val);
+ u32 plu = FIELD_GET(PCIE_MISC_PCIE_STATUS_PCIE_PHYLINKUP_MASK, val);
+
+ return dla && plu;
+}
+
+/* Configuration space read/write support */
+static inline int brcm_pcie_cfg_index(int busnr, int devfn, int reg)
+{
+ return ((PCI_SLOT(devfn) & 0x1f) << PCIE_EXT_SLOT_SHIFT)
+ | ((PCI_FUNC(devfn) & 0x07) << PCIE_EXT_FUNC_SHIFT)
+ | (busnr << PCIE_EXT_BUSNUM_SHIFT)
+ | (reg & ~3);
+}
+
+static void __iomem *brcm_pcie_map_conf(struct pci_bus *bus, unsigned int devfn,
+ int where)
+{
+ struct brcm_pcie *pcie = bus->sysdata;
+ void __iomem *base = pcie->base;
+ int idx;
+
+ /* Accesses to the RC go right to the RC registers if slot==0 */
+ if (pci_is_root_bus(bus))
+ return PCI_SLOT(devfn) ? NULL : base + where;
+
+ /* For devices, write to the config space index register */
+ idx = brcm_pcie_cfg_index(bus->number, devfn, 0);
+ writel(idx, pcie->base + PCIE_EXT_CFG_INDEX);
+ return base + PCIE_EXT_CFG_DATA + where;
+}
+
+static struct pci_ops brcm_pcie_ops = {
+ .map_bus = brcm_pcie_map_conf,
+ .read = pci_generic_config_read,
+ .write = pci_generic_config_write,
+};
+
+static inline void brcm_pcie_bridge_sw_init_set(struct brcm_pcie *pcie, u32 val)
+{
+ u32 tmp;
+
+ tmp = readl(pcie->base + PCIE_RGR1_SW_INIT_1);
+ u32p_replace_bits(&tmp, val, PCIE_RGR1_SW_INIT_1_INIT_MASK);
+ writel(tmp, pcie->base + PCIE_RGR1_SW_INIT_1);
+}
+
+static inline void brcm_pcie_perst_set(struct brcm_pcie *pcie, u32 val)
+{
+ u32 tmp;
+
+ tmp = readl(pcie->base + PCIE_RGR1_SW_INIT_1);
+ u32p_replace_bits(&tmp, val, PCIE_RGR1_SW_INIT_1_PERST_MASK);
+ writel(tmp, pcie->base + PCIE_RGR1_SW_INIT_1);
+}
+
+static inline int brcm_pcie_get_rc_bar2_size_and_offset(struct brcm_pcie *pcie,
+ u64 *rc_bar2_size,
+ u64 *rc_bar2_offset)
+{
+ struct pci_host_bridge *bridge = pci_host_bridge_from_priv(pcie);
+ struct device *dev = pcie->dev;
+ struct resource_entry *entry;
+
+ entry = resource_list_first_type(&bridge->dma_ranges, IORESOURCE_MEM);
+ if (!entry)
+ return -ENODEV;
+
+ *rc_bar2_offset = -entry->offset;
+ *rc_bar2_size = 1ULL << fls64(entry->res->end - entry->res->start);
+
+ /*
+ * We validate the inbound memory view even though we should trust
+ * whatever the device-tree provides. This is because of an HW issue on
+ * early Raspberry Pi 4's revisions (bcm2711). It turns out its
+ * firmware has to dynamically edit dma-ranges due to a bug on the
+ * PCIe controller integration, which prohibits any access above the
+ * lower 3GB of memory. Given this, we decided to keep the dma-ranges
+ * in check, avoiding hard to debug device-tree related issues in the
+ * future:
+ *
+ * The PCIe host controller by design must set the inbound viewport to
+ * be a contiguous arrangement of all of the system's memory. In
+ * addition, its size mut be a power of two. To further complicate
+ * matters, the viewport must start on a pcie-address that is aligned
+ * on a multiple of its size. If a portion of the viewport does not
+ * represent system memory -- e.g. 3GB of memory requires a 4GB
+ * viewport -- we can map the outbound memory in or after 3GB and even
+ * though the viewport will overlap the outbound memory the controller
+ * will know to send outbound memory downstream and everything else
+ * upstream.
+ *
+ * For example:
+ *
+ * - The best-case scenario, memory up to 3GB, is to place the inbound
+ * region in the first 4GB of pcie-space, as some legacy devices can
+ * only address 32bits. We would also like to put the MSI under 4GB
+ * as well, since some devices require a 32bit MSI target address.
+ *
+ * - If the system memory is 4GB or larger we cannot start the inbound
+ * region at location 0 (since we have to allow some space for
+ * outbound memory @ 3GB). So instead it will start at the 1x
+ * multiple of its size
+ */
+ if (!*rc_bar2_size || *rc_bar2_offset % *rc_bar2_size ||
+ (*rc_bar2_offset < SZ_4G && *rc_bar2_offset > SZ_2G)) {
+ dev_err(dev, "Invalid rc_bar2_offset/size: size 0x%llx, off 0x%llx\n",
+ *rc_bar2_size, *rc_bar2_offset);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int brcm_pcie_setup(struct brcm_pcie *pcie)
+{
+ struct pci_host_bridge *bridge = pci_host_bridge_from_priv(pcie);
+ u64 rc_bar2_offset, rc_bar2_size;
+ void __iomem *base = pcie->base;
+ struct device *dev = pcie->dev;
+ struct resource_entry *entry;
+ unsigned int scb_size_val;
+ bool ssc_good = false;
+ struct resource *res;
+ int num_out_wins = 0;
+ u16 nlw, cls, lnksta;
+ int i, ret;
+ u32 tmp;
+
+ /* Reset the bridge */
+ brcm_pcie_bridge_sw_init_set(pcie, 1);
+
+ usleep_range(100, 200);
+
+ /* Take the bridge out of reset */
+ brcm_pcie_bridge_sw_init_set(pcie, 0);
+
+ tmp = readl(base + PCIE_MISC_HARD_PCIE_HARD_DEBUG);
+ tmp &= ~PCIE_MISC_HARD_PCIE_HARD_DEBUG_SERDES_IDDQ_MASK;
+ writel(tmp, base + PCIE_MISC_HARD_PCIE_HARD_DEBUG);
+ /* Wait for SerDes to be stable */
+ usleep_range(100, 200);
+
+ /* Set SCB_MAX_BURST_SIZE, CFG_READ_UR_MODE, SCB_ACCESS_EN */
+ u32p_replace_bits(&tmp, 1, PCIE_MISC_MISC_CTRL_SCB_ACCESS_EN_MASK);
+ u32p_replace_bits(&tmp, 1, PCIE_MISC_MISC_CTRL_CFG_READ_UR_MODE_MASK);
+ u32p_replace_bits(&tmp, PCIE_MISC_MISC_CTRL_MAX_BURST_SIZE_128,
+ PCIE_MISC_MISC_CTRL_MAX_BURST_SIZE_MASK);
+ writel(tmp, base + PCIE_MISC_MISC_CTRL);
+
+ ret = brcm_pcie_get_rc_bar2_size_and_offset(pcie, &rc_bar2_size,
+ &rc_bar2_offset);
+ if (ret)
+ return ret;
+
+ tmp = lower_32_bits(rc_bar2_offset);
+ u32p_replace_bits(&tmp, brcm_pcie_encode_ibar_size(rc_bar2_size),
+ PCIE_MISC_RC_BAR2_CONFIG_LO_SIZE_MASK);
+ writel(tmp, base + PCIE_MISC_RC_BAR2_CONFIG_LO);
+ writel(upper_32_bits(rc_bar2_offset),
+ base + PCIE_MISC_RC_BAR2_CONFIG_HI);
+
+ scb_size_val = rc_bar2_size ?
+ ilog2(rc_bar2_size) - 15 : 0xf; /* 0xf is 1GB */
+ tmp = readl(base + PCIE_MISC_MISC_CTRL);
+ u32p_replace_bits(&tmp, scb_size_val,
+ PCIE_MISC_MISC_CTRL_SCB0_SIZE_MASK);
+ writel(tmp, base + PCIE_MISC_MISC_CTRL);
+
+ /* disable the PCIe->GISB memory window (RC_BAR1) */
+ tmp = readl(base + PCIE_MISC_RC_BAR1_CONFIG_LO);
+ tmp &= ~PCIE_MISC_RC_BAR1_CONFIG_LO_SIZE_MASK;
+ writel(tmp, base + PCIE_MISC_RC_BAR1_CONFIG_LO);
+
+ /* disable the PCIe->SCB memory window (RC_BAR3) */
+ tmp = readl(base + PCIE_MISC_RC_BAR3_CONFIG_LO);
+ tmp &= ~PCIE_MISC_RC_BAR3_CONFIG_LO_SIZE_MASK;
+ writel(tmp, base + PCIE_MISC_RC_BAR3_CONFIG_LO);
+
+ /* Mask all interrupts since we are not handling any yet */
+ writel(0xffffffff, pcie->base + PCIE_MSI_INTR2_MASK_SET);
+
+ /* clear any interrupts we find on boot */
+ writel(0xffffffff, pcie->base + PCIE_MSI_INTR2_CLR);
+
+ if (pcie->gen)
+ brcm_pcie_set_gen(pcie, pcie->gen);
+
+ /* Unassert the fundamental reset */
+ brcm_pcie_perst_set(pcie, 0);
+
+ /*
+ * Give the RC/EP time to wake up, before trying to configure RC.
+ * Intermittently check status for link-up, up to a total of 100ms.
+ */
+ for (i = 0; i < 100 && !brcm_pcie_link_up(pcie); i += 5)
+ msleep(5);
+
+ if (!brcm_pcie_link_up(pcie)) {
+ dev_err(dev, "link down\n");
+ return -ENODEV;
+ }
+
+ if (!brcm_pcie_rc_mode(pcie)) {
+ dev_err(dev, "PCIe misconfigured; is in EP mode\n");
+ return -EINVAL;
+ }
+
+ resource_list_for_each_entry(entry, &bridge->windows) {
+ res = entry->res;
+
+ if (resource_type(res) != IORESOURCE_MEM)
+ continue;
+
+ if (num_out_wins >= BRCM_NUM_PCIE_OUT_WINS) {
+ dev_err(pcie->dev, "too many outbound wins\n");
+ return -EINVAL;
+ }
+
+ brcm_pcie_set_outbound_win(pcie, num_out_wins, res->start,
+ res->start - entry->offset,
+ res->end - res->start + 1);
+ num_out_wins++;
+ }
+
+ /*
+ * For config space accesses on the RC, show the right class for
+ * a PCIe-PCIe bridge (the default setting is to be EP mode).
+ */
+ tmp = readl(base + PCIE_RC_CFG_PRIV1_ID_VAL3);
+ u32p_replace_bits(&tmp, 0x060400,
+ PCIE_RC_CFG_PRIV1_ID_VAL3_CLASS_CODE_MASK);
+ writel(tmp, base + PCIE_RC_CFG_PRIV1_ID_VAL3);
+
+ if (pcie->ssc) {
+ ret = brcm_pcie_set_ssc(pcie);
+ if (ret == 0)
+ ssc_good = true;
+ else
+ dev_err(dev, "failed attempt to enter ssc mode\n");
+ }
+
+ lnksta = readw(base + BRCM_PCIE_CAP_REGS + PCI_EXP_LNKSTA);
+ cls = FIELD_GET(PCI_EXP_LNKSTA_CLS, lnksta);
+ nlw = FIELD_GET(PCI_EXP_LNKSTA_NLW, lnksta);
+ dev_info(dev, "link up, %s x%u %s\n",
+ PCIE_SPEED2STR(cls + PCI_SPEED_133MHz_PCIX_533),
+ nlw, ssc_good ? "(SSC)" : "(!SSC)");
+
+ /* PCIe->SCB endian mode for BAR */
+ tmp = readl(base + PCIE_RC_CFG_VENDOR_VENDOR_SPECIFIC_REG1);
+ u32p_replace_bits(&tmp, PCIE_RC_CFG_VENDOR_SPCIFIC_REG1_LITTLE_ENDIAN,
+ PCIE_RC_CFG_VENDOR_VENDOR_SPECIFIC_REG1_ENDIAN_MODE_BAR2_MASK);
+ writel(tmp, base + PCIE_RC_CFG_VENDOR_VENDOR_SPECIFIC_REG1);
+
+ /*
+ * Refclk from RC should be gated with CLKREQ# input when ASPM L0s,L1
+ * is enabled => setting the CLKREQ_DEBUG_ENABLE field to 1.
+ */
+ tmp = readl(base + PCIE_MISC_HARD_PCIE_HARD_DEBUG);
+ tmp |= PCIE_MISC_HARD_PCIE_HARD_DEBUG_CLKREQ_DEBUG_ENABLE_MASK;
+ writel(tmp, base + PCIE_MISC_HARD_PCIE_HARD_DEBUG);
+
+ return 0;
+}
+
+/* L23 is a low-power PCIe link state */
+static void brcm_pcie_enter_l23(struct brcm_pcie *pcie)
+{
+ void __iomem *base = pcie->base;
+ int l23, i;
+ u32 tmp;
+
+ /* Assert request for L23 */
+ tmp = readl(base + PCIE_MISC_PCIE_CTRL);
+ u32p_replace_bits(&tmp, 1, PCIE_MISC_PCIE_CTRL_PCIE_L23_REQUEST_MASK);
+ writel(tmp, base + PCIE_MISC_PCIE_CTRL);
+
+ /* Wait up to 36 msec for L23 */
+ tmp = readl(base + PCIE_MISC_PCIE_STATUS);
+ l23 = FIELD_GET(PCIE_MISC_PCIE_STATUS_PCIE_LINK_IN_L23_MASK, tmp);
+ for (i = 0; i < 15 && !l23; i++) {
+ usleep_range(2000, 2400);
+ tmp = readl(base + PCIE_MISC_PCIE_STATUS);
+ l23 = FIELD_GET(PCIE_MISC_PCIE_STATUS_PCIE_LINK_IN_L23_MASK,
+ tmp);
+ }
+
+ if (!l23)
+ dev_err(pcie->dev, "failed to enter low-power link state\n");
+}
+
+static void brcm_pcie_turn_off(struct brcm_pcie *pcie)
+{
+ void __iomem *base = pcie->base;
+ int tmp;
+
+ if (brcm_pcie_link_up(pcie))
+ brcm_pcie_enter_l23(pcie);
+ /* Assert fundamental reset */
+ brcm_pcie_perst_set(pcie, 1);
+
+ /* Deassert request for L23 in case it was asserted */
+ tmp = readl(base + PCIE_MISC_PCIE_CTRL);
+ u32p_replace_bits(&tmp, 0, PCIE_MISC_PCIE_CTRL_PCIE_L23_REQUEST_MASK);
+ writel(tmp, base + PCIE_MISC_PCIE_CTRL);
+
+ /* Turn off SerDes */
+ tmp = readl(base + PCIE_MISC_HARD_PCIE_HARD_DEBUG);
+ u32p_replace_bits(&tmp, 1, PCIE_MISC_HARD_PCIE_HARD_DEBUG_SERDES_IDDQ_MASK);
+ writel(tmp, base + PCIE_MISC_HARD_PCIE_HARD_DEBUG);
+
+ /* Shutdown PCIe bridge */
+ brcm_pcie_bridge_sw_init_set(pcie, 1);
+}
+
+static void __brcm_pcie_remove(struct brcm_pcie *pcie)
+{
+ brcm_pcie_turn_off(pcie);
+ clk_disable_unprepare(pcie->clk);
+ clk_put(pcie->clk);
+}
+
+static int brcm_pcie_remove(struct platform_device *pdev)
+{
+ struct brcm_pcie *pcie = platform_get_drvdata(pdev);
+
+ pci_stop_root_bus(pcie->root_bus);
+ pci_remove_root_bus(pcie->root_bus);
+ __brcm_pcie_remove(pcie);
+
+ return 0;
+}
+
+static int brcm_pcie_probe(struct platform_device *pdev)
+{
+ struct device_node *np = pdev->dev.of_node;
+ struct pci_host_bridge *bridge;
+ struct brcm_pcie *pcie;
+ struct pci_bus *child;
+ struct resource *res;
+ int ret;
+
+ bridge = devm_pci_alloc_host_bridge(&pdev->dev, sizeof(*pcie));
+ if (!bridge)
+ return -ENOMEM;
+
+ pcie = pci_host_bridge_priv(bridge);
+ pcie->dev = &pdev->dev;
+ pcie->np = np;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ pcie->base = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(pcie->base))
+ return PTR_ERR(pcie->base);
+
+ pcie->clk = devm_clk_get_optional(&pdev->dev, "sw_pcie");
+ if (IS_ERR(pcie->clk))
+ return PTR_ERR(pcie->clk);
+
+ ret = of_pci_get_max_link_speed(np);
+ pcie->gen = (ret < 0) ? 0 : ret;
+
+ pcie->ssc = of_property_read_bool(np, "brcm,enable-ssc");
+
+ ret = pci_parse_request_of_pci_ranges(pcie->dev, &bridge->windows,
+ &bridge->dma_ranges, NULL);
+ if (ret)
+ return ret;
+
+ ret = clk_prepare_enable(pcie->clk);
+ if (ret) {
+ dev_err(&pdev->dev, "could not enable clock\n");
+ return ret;
+ }
+
+ ret = brcm_pcie_setup(pcie);
+ if (ret)
+ goto fail;
+
+ bridge->dev.parent = &pdev->dev;
+ bridge->busnr = 0;
+ bridge->ops = &brcm_pcie_ops;
+ bridge->sysdata = pcie;
+ bridge->map_irq = of_irq_parse_and_map_pci;
+ bridge->swizzle_irq = pci_common_swizzle;
+
+ ret = pci_scan_root_bus_bridge(bridge);
+ if (ret < 0) {
+ dev_err(pcie->dev, "Scanning root bridge failed\n");
+ goto fail;
+ }
+
+ pci_assign_unassigned_bus_resources(bridge->bus);
+ list_for_each_entry(child, &bridge->bus->children, node)
+ pcie_bus_configure_settings(child);
+ pci_bus_add_devices(bridge->bus);
+ platform_set_drvdata(pdev, pcie);
+ pcie->root_bus = bridge->bus;
+
+ return 0;
+fail:
+ __brcm_pcie_remove(pcie);
+ return ret;
+}
+
+static const struct of_device_id brcm_pcie_match[] = {
+ { .compatible = "brcm,bcm2711-pcie" },
+ {},
+};
+MODULE_DEVICE_TABLE(of, brcm_pcie_match);
+
+static struct platform_driver brcm_pcie_driver = {
+ .probe = brcm_pcie_probe,
+ .remove = brcm_pcie_remove,
+ .driver = {
+ .name = "brcm-pcie",
+ .of_match_table = brcm_pcie_match,
+ },
+};
+module_platform_driver(brcm_pcie_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Broadcom STB PCIe RC driver");
+MODULE_AUTHOR("Broadcom");
--
2.24.0
^ permalink raw reply related [flat|nested] 71+ messages in thread
* [PATCH v4 3/8] PCI: brcmstb: Add Broadcom STB PCIe host controller driver
@ 2019-12-03 11:47 ` Nicolas Saenz Julienne
0 siblings, 0 replies; 71+ messages in thread
From: Nicolas Saenz Julienne @ 2019-12-03 11:47 UTC (permalink / raw)
To: andrew.murray, maz, linux-kernel, Lorenzo Pieralisi,
Florian Fainelli, bcm-kernel-feedback-list, Eric Anholt,
Stefan Wahren
Cc: linux-arm-kernel, mbrugger, linux-pci, phil, jeremy.linton,
linux-rpi-kernel, james.quinlan, Bjorn Helgaas,
Nicolas Saenz Julienne
From: Jim Quinlan <james.quinlan@broadcom.com>
This adds a basic driver for Broadcom's STB PCIe controller, for now
aimed at Raspberry Pi 4's SoC, bcm2711.
Signed-off-by: Jim Quinlan <james.quinlan@broadcom.com>
Co-developed-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
Reviewed-by: Andrew Murray <andrew.murray@arm.com>
---
Changes since v3:
- Update commit message
- rollback roundup_pow_two usage, it'll be updated later down the line
- Remove comment in register definition
Changes since v2:
- Correct rc_bar2_offset sign
- Invert IRQ clear and masking in setup code
- Use bitfield.h, redo all register ops while keeping the register
names intact
- Remove all SHIFT register definitions
- Get rid of all _RB writes
- Get rid of of_data
- Don't iterate over inexisting dma-ranges
- Add comment regarding dma-ranges validation
- Small cosmetic cleanups
- Fix license mismatch
- Set driver Kconfig tristate
- Didn't add any comment about the controller not being I/O coherent
for now as I wait for Jeremy's reply
Changes since v1:
- Fix Kconfig
- Remove pci domain check
- Remove all MSI related code
- Remove supend/resume code
- Simplify link state wait routine
- Prefix all functions
- Use of_device_get_match_data()
- Use devm_clk_get_optional()
- Get rid of irq variable
- Use STB all over the driver
- Simplify map_bus() function
- Fix license mismatch
- Remove unused register definitions
- Small cleanups, spell errors
This is based on Jim's original submission[1] but adapted and tailored
specifically to bcm2711's needs (that's the Raspberry Pi 4). Support for
the rest of the brcmstb family will soon follow once we get support for
multiple dma-ranges in dma/direct.
[1] https://patchwork.kernel.org/patch/10605959/
drivers/pci/controller/Kconfig | 8 +
drivers/pci/controller/Makefile | 1 +
drivers/pci/controller/pcie-brcmstb.c | 748 ++++++++++++++++++++++++++
3 files changed, 757 insertions(+)
create mode 100644 drivers/pci/controller/pcie-brcmstb.c
diff --git a/drivers/pci/controller/Kconfig b/drivers/pci/controller/Kconfig
index c77069c8ee5d..27504f108ee5 100644
--- a/drivers/pci/controller/Kconfig
+++ b/drivers/pci/controller/Kconfig
@@ -253,6 +253,14 @@ config VMD
To compile this driver as a module, choose M here: the
module will be called vmd.
+config PCIE_BRCMSTB
+ tristate "Broadcom Brcmstb PCIe host controller"
+ depends on ARCH_BCM2835 || COMPILE_TEST
+ depends on OF
+ help
+ Say Y here to enable PCIe host controller support for
+ Broadcom STB based SoCs, like the Raspberry Pi 4.
+
config PCI_HYPERV_INTERFACE
tristate "Hyper-V PCI Interface"
depends on X86 && HYPERV && PCI_MSI && PCI_MSI_IRQ_DOMAIN && X86_64
diff --git a/drivers/pci/controller/Makefile b/drivers/pci/controller/Makefile
index 3d4f597f15ce..01b2502a5323 100644
--- a/drivers/pci/controller/Makefile
+++ b/drivers/pci/controller/Makefile
@@ -28,6 +28,7 @@ obj-$(CONFIG_PCIE_MEDIATEK) += pcie-mediatek.o
obj-$(CONFIG_PCIE_MOBIVEIL) += pcie-mobiveil.o
obj-$(CONFIG_PCIE_TANGO_SMP8759) += pcie-tango.o
obj-$(CONFIG_VMD) += vmd.o
+obj-$(CONFIG_PCIE_BRCMSTB) += pcie-brcmstb.o
# pcie-hisi.o quirks are needed even without CONFIG_PCIE_DW
obj-y += dwc/
diff --git a/drivers/pci/controller/pcie-brcmstb.c b/drivers/pci/controller/pcie-brcmstb.c
new file mode 100644
index 000000000000..dd681164faa0
--- /dev/null
+++ b/drivers/pci/controller/pcie-brcmstb.c
@@ -0,0 +1,748 @@
+// SPDX-License-Identifier: GPL-2.0+
+/* Copyright (C) 2009 - 2019 Broadcom */
+
+#include <linux/bitfield.h>
+#include <linux/clk.h>
+#include <linux/compiler.h>
+#include <linux/delay.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/ioport.h>
+#include <linux/irqdomain.h>
+#include <linux/kernel.h>
+#include <linux/list.h>
+#include <linux/log2.h>
+#include <linux/module.h>
+#include <linux/of_address.h>
+#include <linux/of_irq.h>
+#include <linux/of_pci.h>
+#include <linux/of_platform.h>
+#include <linux/pci.h>
+#include <linux/printk.h>
+#include <linux/sizes.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+#include <linux/types.h>
+
+#include "../pci.h"
+
+/* BRCM_PCIE_CAP_REGS - Offset for the mandatory capability config regs */
+#define BRCM_PCIE_CAP_REGS 0x00ac
+
+/* Broadcom STB PCIe Register Offsets */
+#define PCIE_RC_CFG_VENDOR_VENDOR_SPECIFIC_REG1 0x0188
+#define PCIE_RC_CFG_VENDOR_VENDOR_SPECIFIC_REG1_ENDIAN_MODE_BAR2_MASK 0xc
+#define PCIE_RC_CFG_VENDOR_SPCIFIC_REG1_LITTLE_ENDIAN 0x0
+
+#define PCIE_RC_CFG_PRIV1_ID_VAL3 0x043c
+#define PCIE_RC_CFG_PRIV1_ID_VAL3_CLASS_CODE_MASK 0xffffff
+
+#define PCIE_RC_DL_MDIO_ADDR 0x1100
+#define PCIE_RC_DL_MDIO_WR_DATA 0x1104
+#define PCIE_RC_DL_MDIO_RD_DATA 0x1108
+
+#define PCIE_MISC_MISC_CTRL 0x4008
+#define PCIE_MISC_MISC_CTRL_SCB_ACCESS_EN_MASK 0x1000
+#define PCIE_MISC_MISC_CTRL_CFG_READ_UR_MODE_MASK 0x2000
+#define PCIE_MISC_MISC_CTRL_MAX_BURST_SIZE_MASK 0x300000
+#define PCIE_MISC_MISC_CTRL_MAX_BURST_SIZE_128 0x0
+#define PCIE_MISC_MISC_CTRL_SCB0_SIZE_MASK 0xf8000000
+
+#define PCIE_MISC_CPU_2_PCIE_MEM_WIN0_LO 0x400c
+#define PCIE_MEM_WIN0_LO(win) \
+ PCIE_MISC_CPU_2_PCIE_MEM_WIN0_LO + ((win) * 4)
+
+#define PCIE_MISC_CPU_2_PCIE_MEM_WIN0_HI 0x4010
+#define PCIE_MEM_WIN0_HI(win) \
+ PCIE_MISC_CPU_2_PCIE_MEM_WIN0_HI + ((win) * 4)
+
+#define PCIE_MISC_RC_BAR1_CONFIG_LO 0x402c
+#define PCIE_MISC_RC_BAR1_CONFIG_LO_SIZE_MASK 0x1f
+
+#define PCIE_MISC_RC_BAR2_CONFIG_LO 0x4034
+#define PCIE_MISC_RC_BAR2_CONFIG_LO_SIZE_MASK 0x1f
+#define PCIE_MISC_RC_BAR2_CONFIG_HI 0x4038
+
+#define PCIE_MISC_RC_BAR3_CONFIG_LO 0x403c
+#define PCIE_MISC_RC_BAR3_CONFIG_LO_SIZE_MASK 0x1f
+
+#define PCIE_MISC_PCIE_CTRL 0x4064
+#define PCIE_MISC_PCIE_CTRL_PCIE_L23_REQUEST_MASK 0x1
+
+#define PCIE_MISC_PCIE_STATUS 0x4068
+#define PCIE_MISC_PCIE_STATUS_PCIE_PORT_MASK 0x80
+#define PCIE_MISC_PCIE_STATUS_PCIE_DL_ACTIVE_MASK 0x20
+#define PCIE_MISC_PCIE_STATUS_PCIE_PHYLINKUP_MASK 0x10
+#define PCIE_MISC_PCIE_STATUS_PCIE_LINK_IN_L23_MASK 0x40
+
+#define PCIE_MISC_CPU_2_PCIE_MEM_WIN0_BASE_LIMIT 0x4070
+#define PCIE_MISC_CPU_2_PCIE_MEM_WIN0_BASE_LIMIT_LIMIT_MASK 0xfff00000
+#define PCIE_MISC_CPU_2_PCIE_MEM_WIN0_BASE_LIMIT_BASE_MASK 0xfff0
+#define PCIE_MEM_WIN0_BASE_LIMIT(win) \
+ PCIE_MISC_CPU_2_PCIE_MEM_WIN0_BASE_LIMIT + ((win) * 4)
+
+#define PCIE_MISC_CPU_2_PCIE_MEM_WIN0_BASE_HI 0x4080
+#define PCIE_MISC_CPU_2_PCIE_MEM_WIN0_BASE_HI_BASE_MASK 0xff
+#define PCIE_MEM_WIN0_BASE_HI(win) \
+ PCIE_MISC_CPU_2_PCIE_MEM_WIN0_BASE_HI + ((win) * 8)
+
+#define PCIE_MISC_CPU_2_PCIE_MEM_WIN0_LIMIT_HI 0x4084
+#define PCIE_MISC_CPU_2_PCIE_MEM_WIN0_LIMIT_HI_LIMIT_MASK 0xff
+#define PCIE_MEM_WIN0_LIMIT_HI(win) \
+ PCIE_MISC_CPU_2_PCIE_MEM_WIN0_LIMIT_HI + ((win) * 8)
+
+#define PCIE_MISC_HARD_PCIE_HARD_DEBUG 0x4204
+#define PCIE_MISC_HARD_PCIE_HARD_DEBUG_CLKREQ_DEBUG_ENABLE_MASK 0x2
+#define PCIE_MISC_HARD_PCIE_HARD_DEBUG_SERDES_IDDQ_MASK 0x08000000
+
+#define PCIE_MSI_INTR2_STATUS 0x4500
+#define PCIE_MSI_INTR2_CLR 0x4508
+#define PCIE_MSI_INTR2_MASK_SET 0x4510
+#define PCIE_MSI_INTR2_MASK_CLR 0x4514
+
+#define PCIE_EXT_CFG_DATA 0x8000
+
+#define PCIE_EXT_CFG_INDEX 0x9000
+#define PCIE_EXT_BUSNUM_SHIFT 20
+#define PCIE_EXT_SLOT_SHIFT 15
+#define PCIE_EXT_FUNC_SHIFT 12
+
+#define PCIE_RGR1_SW_INIT_1 0x9210
+#define PCIE_RGR1_SW_INIT_1_PERST_MASK 0x1
+#define PCIE_RGR1_SW_INIT_1_INIT_MASK 0x2
+
+/* PCIe parameters */
+#define BRCM_NUM_PCIE_OUT_WINS 0x4
+
+/* MDIO registers */
+#define MDIO_PORT0 0x0
+#define MDIO_DATA_MASK 0x7fffffff
+#define MDIO_PORT_MASK 0xf0000
+#define MDIO_REGAD_MASK 0xffff
+#define MDIO_CMD_MASK 0xfff00000
+#define MDIO_CMD_READ 0x1
+#define MDIO_CMD_WRITE 0x0
+#define MDIO_DATA_DONE_MASK 0x80000000
+#define MDIO_RD_DONE(x) (((x) & MDIO_DATA_DONE_MASK) ? 1 : 0)
+#define MDIO_WT_DONE(x) (((x) & MDIO_DATA_DONE_MASK) ? 0 : 1)
+#define SSC_REGS_ADDR 0x1100
+#define SET_ADDR_OFFSET 0x1f
+#define SSC_CNTL_OFFSET 0x2
+#define SSC_CNTL_OVRD_EN_MASK 0x8000
+#define SSC_CNTL_OVRD_VAL_MASK 0x4000
+#define SSC_STATUS_OFFSET 0x1
+#define SSC_STATUS_SSC_MASK 0x400
+#define SSC_STATUS_PLL_LOCK_MASK 0x800
+
+/* Internal PCIe Host Controller Information.*/
+struct brcm_pcie {
+ struct device *dev;
+ void __iomem *base;
+ struct clk *clk;
+ struct pci_bus *root_bus;
+ struct device_node *np;
+ bool ssc;
+ int gen;
+};
+
+/*
+ * This is to convert the size of the inbound "BAR" region to the
+ * non-linear values of PCIE_X_MISC_RC_BAR[123]_CONFIG_LO.SIZE
+ */
+static int brcm_pcie_encode_ibar_size(u64 size)
+{
+ int log2_in = ilog2(size);
+
+ if (log2_in >= 12 && log2_in <= 15)
+ /* Covers 4KB to 32KB (inclusive) */
+ return (log2_in - 12) + 0x1c;
+ else if (log2_in >= 16 && log2_in <= 35)
+ /* Covers 64KB to 32GB, (inclusive) */
+ return log2_in - 15;
+ /* Something is awry so disable */
+ return 0;
+}
+
+static u32 brcm_pcie_mdio_form_pkt(int port, int regad, int cmd)
+{
+ u32 pkt = 0;
+
+ pkt |= FIELD_PREP(MDIO_PORT_MASK, port);
+ pkt |= FIELD_PREP(MDIO_REGAD_MASK, regad);
+ pkt |= FIELD_PREP(MDIO_CMD_MASK, cmd);
+
+ return pkt;
+}
+
+/* negative return value indicates error */
+static int brcm_pcie_mdio_read(void __iomem *base, u8 port, u8 regad, u32 *val)
+{
+ int tries;
+ u32 data;
+
+ writel(brcm_pcie_mdio_form_pkt(port, regad, MDIO_CMD_READ),
+ base + PCIE_RC_DL_MDIO_ADDR);
+ readl(base + PCIE_RC_DL_MDIO_ADDR);
+
+ data = readl(base + PCIE_RC_DL_MDIO_RD_DATA);
+ for (tries = 0; !MDIO_RD_DONE(data) && tries < 10; tries++) {
+ udelay(10);
+ data = readl(base + PCIE_RC_DL_MDIO_RD_DATA);
+ }
+
+ *val = FIELD_GET(MDIO_DATA_MASK, data);
+ return MDIO_RD_DONE(data) ? 0 : -EIO;
+}
+
+/* negative return value indicates error */
+static int brcm_pcie_mdio_write(void __iomem *base, u8 port,
+ u8 regad, u16 wrdata)
+{
+ int tries;
+ u32 data;
+
+ writel(brcm_pcie_mdio_form_pkt(port, regad, MDIO_CMD_WRITE),
+ base + PCIE_RC_DL_MDIO_ADDR);
+ readl(base + PCIE_RC_DL_MDIO_ADDR);
+ writel(MDIO_DATA_DONE_MASK | wrdata, base + PCIE_RC_DL_MDIO_WR_DATA);
+
+ data = readl(base + PCIE_RC_DL_MDIO_WR_DATA);
+ for (tries = 0; !MDIO_WT_DONE(data) && tries < 10; tries++) {
+ udelay(10);
+ data = readl(base + PCIE_RC_DL_MDIO_WR_DATA);
+ }
+
+ return MDIO_WT_DONE(data) ? 0 : -EIO;
+}
+
+/*
+ * Configures device for Spread Spectrum Clocking (SSC) mode; a negative
+ * return value indicates error.
+ */
+static int brcm_pcie_set_ssc(struct brcm_pcie *pcie)
+{
+ int pll, ssc;
+ int ret;
+ u32 tmp;
+
+ ret = brcm_pcie_mdio_write(pcie->base, MDIO_PORT0, SET_ADDR_OFFSET,
+ SSC_REGS_ADDR);
+ if (ret < 0)
+ return ret;
+
+ ret = brcm_pcie_mdio_read(pcie->base, MDIO_PORT0,
+ SSC_CNTL_OFFSET, &tmp);
+ if (ret < 0)
+ return ret;
+
+ u32p_replace_bits(&tmp, 1, SSC_CNTL_OVRD_EN_MASK);
+ u32p_replace_bits(&tmp, 1, SSC_CNTL_OVRD_VAL_MASK);
+ ret = brcm_pcie_mdio_write(pcie->base, MDIO_PORT0,
+ SSC_CNTL_OFFSET, tmp);
+ if (ret < 0)
+ return ret;
+
+ usleep_range(1000, 2000);
+ ret = brcm_pcie_mdio_read(pcie->base, MDIO_PORT0,
+ SSC_STATUS_OFFSET, &tmp);
+ if (ret < 0)
+ return ret;
+
+ ssc = FIELD_GET(SSC_STATUS_SSC_MASK, tmp);
+ pll = FIELD_GET(SSC_STATUS_PLL_LOCK_MASK, tmp);
+
+ return ssc && pll ? 0 : -EIO;
+}
+
+/* Limits operation to a specific generation (1, 2, or 3) */
+static void brcm_pcie_set_gen(struct brcm_pcie *pcie, int gen)
+{
+ u16 lnkctl2 = readw(pcie->base + BRCM_PCIE_CAP_REGS + PCI_EXP_LNKCTL2);
+ u32 lnkcap = readl(pcie->base + BRCM_PCIE_CAP_REGS + PCI_EXP_LNKCAP);
+
+ lnkcap = (lnkcap & ~PCI_EXP_LNKCAP_SLS) | gen;
+ writel(lnkcap, pcie->base + BRCM_PCIE_CAP_REGS + PCI_EXP_LNKCAP);
+
+ lnkctl2 = (lnkctl2 & ~0xf) | gen;
+ writew(lnkctl2, pcie->base + BRCM_PCIE_CAP_REGS + PCI_EXP_LNKCTL2);
+}
+
+static void brcm_pcie_set_outbound_win(struct brcm_pcie *pcie,
+ unsigned int win, u64 cpu_addr,
+ u64 pcie_addr, u64 size)
+{
+ u32 cpu_addr_mb_high, limit_addr_mb_high;
+ phys_addr_t cpu_addr_mb, limit_addr_mb;
+ int high_addr_shift;
+ u32 tmp;
+
+ /* Set the base of the pcie_addr window */
+ writel(lower_32_bits(pcie_addr), pcie->base + PCIE_MEM_WIN0_LO(win));
+ writel(upper_32_bits(pcie_addr), pcie->base + PCIE_MEM_WIN0_HI(win));
+
+ /* Write the addr base & limit lower bits (in MBs) */
+ cpu_addr_mb = cpu_addr / SZ_1M;
+ limit_addr_mb = (cpu_addr + size - 1) / SZ_1M;
+
+ tmp = readl(pcie->base + PCIE_MEM_WIN0_BASE_LIMIT(win));
+ u32p_replace_bits(&tmp, cpu_addr_mb,
+ PCIE_MISC_CPU_2_PCIE_MEM_WIN0_BASE_LIMIT_BASE_MASK);
+ u32p_replace_bits(&tmp, limit_addr_mb,
+ PCIE_MISC_CPU_2_PCIE_MEM_WIN0_BASE_LIMIT_LIMIT_MASK);
+ writel(tmp, pcie->base + PCIE_MEM_WIN0_BASE_LIMIT(win));
+
+ /* Write the cpu & limit addr upper bits */
+ high_addr_shift =
+ HWEIGHT32(PCIE_MISC_CPU_2_PCIE_MEM_WIN0_BASE_LIMIT_BASE_MASK);
+
+ cpu_addr_mb_high = cpu_addr_mb >> high_addr_shift;
+ tmp = readl(pcie->base + PCIE_MEM_WIN0_BASE_HI(win));
+ u32p_replace_bits(&tmp, cpu_addr_mb_high,
+ PCIE_MISC_CPU_2_PCIE_MEM_WIN0_BASE_HI_BASE_MASK);
+ writel(tmp, pcie->base + PCIE_MEM_WIN0_BASE_HI(win));
+
+ limit_addr_mb_high = limit_addr_mb >> high_addr_shift;
+ tmp = readl(pcie->base + PCIE_MEM_WIN0_LIMIT_HI(win));
+ u32p_replace_bits(&tmp, limit_addr_mb_high,
+ PCIE_MISC_CPU_2_PCIE_MEM_WIN0_LIMIT_HI_LIMIT_MASK);
+ writel(tmp, pcie->base + PCIE_MEM_WIN0_LIMIT_HI(win));
+}
+
+/* The controller is capable of serving in both RC and EP roles */
+static bool brcm_pcie_rc_mode(struct brcm_pcie *pcie)
+{
+ void __iomem *base = pcie->base;
+ u32 val = readl(base + PCIE_MISC_PCIE_STATUS);
+
+ return !!FIELD_GET(PCIE_MISC_PCIE_STATUS_PCIE_PORT_MASK, val);
+}
+
+static bool brcm_pcie_link_up(struct brcm_pcie *pcie)
+{
+ u32 val = readl(pcie->base + PCIE_MISC_PCIE_STATUS);
+ u32 dla = FIELD_GET(PCIE_MISC_PCIE_STATUS_PCIE_DL_ACTIVE_MASK, val);
+ u32 plu = FIELD_GET(PCIE_MISC_PCIE_STATUS_PCIE_PHYLINKUP_MASK, val);
+
+ return dla && plu;
+}
+
+/* Configuration space read/write support */
+static inline int brcm_pcie_cfg_index(int busnr, int devfn, int reg)
+{
+ return ((PCI_SLOT(devfn) & 0x1f) << PCIE_EXT_SLOT_SHIFT)
+ | ((PCI_FUNC(devfn) & 0x07) << PCIE_EXT_FUNC_SHIFT)
+ | (busnr << PCIE_EXT_BUSNUM_SHIFT)
+ | (reg & ~3);
+}
+
+static void __iomem *brcm_pcie_map_conf(struct pci_bus *bus, unsigned int devfn,
+ int where)
+{
+ struct brcm_pcie *pcie = bus->sysdata;
+ void __iomem *base = pcie->base;
+ int idx;
+
+ /* Accesses to the RC go right to the RC registers if slot==0 */
+ if (pci_is_root_bus(bus))
+ return PCI_SLOT(devfn) ? NULL : base + where;
+
+ /* For devices, write to the config space index register */
+ idx = brcm_pcie_cfg_index(bus->number, devfn, 0);
+ writel(idx, pcie->base + PCIE_EXT_CFG_INDEX);
+ return base + PCIE_EXT_CFG_DATA + where;
+}
+
+static struct pci_ops brcm_pcie_ops = {
+ .map_bus = brcm_pcie_map_conf,
+ .read = pci_generic_config_read,
+ .write = pci_generic_config_write,
+};
+
+static inline void brcm_pcie_bridge_sw_init_set(struct brcm_pcie *pcie, u32 val)
+{
+ u32 tmp;
+
+ tmp = readl(pcie->base + PCIE_RGR1_SW_INIT_1);
+ u32p_replace_bits(&tmp, val, PCIE_RGR1_SW_INIT_1_INIT_MASK);
+ writel(tmp, pcie->base + PCIE_RGR1_SW_INIT_1);
+}
+
+static inline void brcm_pcie_perst_set(struct brcm_pcie *pcie, u32 val)
+{
+ u32 tmp;
+
+ tmp = readl(pcie->base + PCIE_RGR1_SW_INIT_1);
+ u32p_replace_bits(&tmp, val, PCIE_RGR1_SW_INIT_1_PERST_MASK);
+ writel(tmp, pcie->base + PCIE_RGR1_SW_INIT_1);
+}
+
+static inline int brcm_pcie_get_rc_bar2_size_and_offset(struct brcm_pcie *pcie,
+ u64 *rc_bar2_size,
+ u64 *rc_bar2_offset)
+{
+ struct pci_host_bridge *bridge = pci_host_bridge_from_priv(pcie);
+ struct device *dev = pcie->dev;
+ struct resource_entry *entry;
+
+ entry = resource_list_first_type(&bridge->dma_ranges, IORESOURCE_MEM);
+ if (!entry)
+ return -ENODEV;
+
+ *rc_bar2_offset = -entry->offset;
+ *rc_bar2_size = 1ULL << fls64(entry->res->end - entry->res->start);
+
+ /*
+ * We validate the inbound memory view even though we should trust
+ * whatever the device-tree provides. This is because of an HW issue on
+ * early Raspberry Pi 4's revisions (bcm2711). It turns out its
+ * firmware has to dynamically edit dma-ranges due to a bug on the
+ * PCIe controller integration, which prohibits any access above the
+ * lower 3GB of memory. Given this, we decided to keep the dma-ranges
+ * in check, avoiding hard to debug device-tree related issues in the
+ * future:
+ *
+ * The PCIe host controller by design must set the inbound viewport to
+ * be a contiguous arrangement of all of the system's memory. In
+ * addition, its size mut be a power of two. To further complicate
+ * matters, the viewport must start on a pcie-address that is aligned
+ * on a multiple of its size. If a portion of the viewport does not
+ * represent system memory -- e.g. 3GB of memory requires a 4GB
+ * viewport -- we can map the outbound memory in or after 3GB and even
+ * though the viewport will overlap the outbound memory the controller
+ * will know to send outbound memory downstream and everything else
+ * upstream.
+ *
+ * For example:
+ *
+ * - The best-case scenario, memory up to 3GB, is to place the inbound
+ * region in the first 4GB of pcie-space, as some legacy devices can
+ * only address 32bits. We would also like to put the MSI under 4GB
+ * as well, since some devices require a 32bit MSI target address.
+ *
+ * - If the system memory is 4GB or larger we cannot start the inbound
+ * region at location 0 (since we have to allow some space for
+ * outbound memory @ 3GB). So instead it will start at the 1x
+ * multiple of its size
+ */
+ if (!*rc_bar2_size || *rc_bar2_offset % *rc_bar2_size ||
+ (*rc_bar2_offset < SZ_4G && *rc_bar2_offset > SZ_2G)) {
+ dev_err(dev, "Invalid rc_bar2_offset/size: size 0x%llx, off 0x%llx\n",
+ *rc_bar2_size, *rc_bar2_offset);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int brcm_pcie_setup(struct brcm_pcie *pcie)
+{
+ struct pci_host_bridge *bridge = pci_host_bridge_from_priv(pcie);
+ u64 rc_bar2_offset, rc_bar2_size;
+ void __iomem *base = pcie->base;
+ struct device *dev = pcie->dev;
+ struct resource_entry *entry;
+ unsigned int scb_size_val;
+ bool ssc_good = false;
+ struct resource *res;
+ int num_out_wins = 0;
+ u16 nlw, cls, lnksta;
+ int i, ret;
+ u32 tmp;
+
+ /* Reset the bridge */
+ brcm_pcie_bridge_sw_init_set(pcie, 1);
+
+ usleep_range(100, 200);
+
+ /* Take the bridge out of reset */
+ brcm_pcie_bridge_sw_init_set(pcie, 0);
+
+ tmp = readl(base + PCIE_MISC_HARD_PCIE_HARD_DEBUG);
+ tmp &= ~PCIE_MISC_HARD_PCIE_HARD_DEBUG_SERDES_IDDQ_MASK;
+ writel(tmp, base + PCIE_MISC_HARD_PCIE_HARD_DEBUG);
+ /* Wait for SerDes to be stable */
+ usleep_range(100, 200);
+
+ /* Set SCB_MAX_BURST_SIZE, CFG_READ_UR_MODE, SCB_ACCESS_EN */
+ u32p_replace_bits(&tmp, 1, PCIE_MISC_MISC_CTRL_SCB_ACCESS_EN_MASK);
+ u32p_replace_bits(&tmp, 1, PCIE_MISC_MISC_CTRL_CFG_READ_UR_MODE_MASK);
+ u32p_replace_bits(&tmp, PCIE_MISC_MISC_CTRL_MAX_BURST_SIZE_128,
+ PCIE_MISC_MISC_CTRL_MAX_BURST_SIZE_MASK);
+ writel(tmp, base + PCIE_MISC_MISC_CTRL);
+
+ ret = brcm_pcie_get_rc_bar2_size_and_offset(pcie, &rc_bar2_size,
+ &rc_bar2_offset);
+ if (ret)
+ return ret;
+
+ tmp = lower_32_bits(rc_bar2_offset);
+ u32p_replace_bits(&tmp, brcm_pcie_encode_ibar_size(rc_bar2_size),
+ PCIE_MISC_RC_BAR2_CONFIG_LO_SIZE_MASK);
+ writel(tmp, base + PCIE_MISC_RC_BAR2_CONFIG_LO);
+ writel(upper_32_bits(rc_bar2_offset),
+ base + PCIE_MISC_RC_BAR2_CONFIG_HI);
+
+ scb_size_val = rc_bar2_size ?
+ ilog2(rc_bar2_size) - 15 : 0xf; /* 0xf is 1GB */
+ tmp = readl(base + PCIE_MISC_MISC_CTRL);
+ u32p_replace_bits(&tmp, scb_size_val,
+ PCIE_MISC_MISC_CTRL_SCB0_SIZE_MASK);
+ writel(tmp, base + PCIE_MISC_MISC_CTRL);
+
+ /* disable the PCIe->GISB memory window (RC_BAR1) */
+ tmp = readl(base + PCIE_MISC_RC_BAR1_CONFIG_LO);
+ tmp &= ~PCIE_MISC_RC_BAR1_CONFIG_LO_SIZE_MASK;
+ writel(tmp, base + PCIE_MISC_RC_BAR1_CONFIG_LO);
+
+ /* disable the PCIe->SCB memory window (RC_BAR3) */
+ tmp = readl(base + PCIE_MISC_RC_BAR3_CONFIG_LO);
+ tmp &= ~PCIE_MISC_RC_BAR3_CONFIG_LO_SIZE_MASK;
+ writel(tmp, base + PCIE_MISC_RC_BAR3_CONFIG_LO);
+
+ /* Mask all interrupts since we are not handling any yet */
+ writel(0xffffffff, pcie->base + PCIE_MSI_INTR2_MASK_SET);
+
+ /* clear any interrupts we find on boot */
+ writel(0xffffffff, pcie->base + PCIE_MSI_INTR2_CLR);
+
+ if (pcie->gen)
+ brcm_pcie_set_gen(pcie, pcie->gen);
+
+ /* Unassert the fundamental reset */
+ brcm_pcie_perst_set(pcie, 0);
+
+ /*
+ * Give the RC/EP time to wake up, before trying to configure RC.
+ * Intermittently check status for link-up, up to a total of 100ms.
+ */
+ for (i = 0; i < 100 && !brcm_pcie_link_up(pcie); i += 5)
+ msleep(5);
+
+ if (!brcm_pcie_link_up(pcie)) {
+ dev_err(dev, "link down\n");
+ return -ENODEV;
+ }
+
+ if (!brcm_pcie_rc_mode(pcie)) {
+ dev_err(dev, "PCIe misconfigured; is in EP mode\n");
+ return -EINVAL;
+ }
+
+ resource_list_for_each_entry(entry, &bridge->windows) {
+ res = entry->res;
+
+ if (resource_type(res) != IORESOURCE_MEM)
+ continue;
+
+ if (num_out_wins >= BRCM_NUM_PCIE_OUT_WINS) {
+ dev_err(pcie->dev, "too many outbound wins\n");
+ return -EINVAL;
+ }
+
+ brcm_pcie_set_outbound_win(pcie, num_out_wins, res->start,
+ res->start - entry->offset,
+ res->end - res->start + 1);
+ num_out_wins++;
+ }
+
+ /*
+ * For config space accesses on the RC, show the right class for
+ * a PCIe-PCIe bridge (the default setting is to be EP mode).
+ */
+ tmp = readl(base + PCIE_RC_CFG_PRIV1_ID_VAL3);
+ u32p_replace_bits(&tmp, 0x060400,
+ PCIE_RC_CFG_PRIV1_ID_VAL3_CLASS_CODE_MASK);
+ writel(tmp, base + PCIE_RC_CFG_PRIV1_ID_VAL3);
+
+ if (pcie->ssc) {
+ ret = brcm_pcie_set_ssc(pcie);
+ if (ret == 0)
+ ssc_good = true;
+ else
+ dev_err(dev, "failed attempt to enter ssc mode\n");
+ }
+
+ lnksta = readw(base + BRCM_PCIE_CAP_REGS + PCI_EXP_LNKSTA);
+ cls = FIELD_GET(PCI_EXP_LNKSTA_CLS, lnksta);
+ nlw = FIELD_GET(PCI_EXP_LNKSTA_NLW, lnksta);
+ dev_info(dev, "link up, %s x%u %s\n",
+ PCIE_SPEED2STR(cls + PCI_SPEED_133MHz_PCIX_533),
+ nlw, ssc_good ? "(SSC)" : "(!SSC)");
+
+ /* PCIe->SCB endian mode for BAR */
+ tmp = readl(base + PCIE_RC_CFG_VENDOR_VENDOR_SPECIFIC_REG1);
+ u32p_replace_bits(&tmp, PCIE_RC_CFG_VENDOR_SPCIFIC_REG1_LITTLE_ENDIAN,
+ PCIE_RC_CFG_VENDOR_VENDOR_SPECIFIC_REG1_ENDIAN_MODE_BAR2_MASK);
+ writel(tmp, base + PCIE_RC_CFG_VENDOR_VENDOR_SPECIFIC_REG1);
+
+ /*
+ * Refclk from RC should be gated with CLKREQ# input when ASPM L0s,L1
+ * is enabled => setting the CLKREQ_DEBUG_ENABLE field to 1.
+ */
+ tmp = readl(base + PCIE_MISC_HARD_PCIE_HARD_DEBUG);
+ tmp |= PCIE_MISC_HARD_PCIE_HARD_DEBUG_CLKREQ_DEBUG_ENABLE_MASK;
+ writel(tmp, base + PCIE_MISC_HARD_PCIE_HARD_DEBUG);
+
+ return 0;
+}
+
+/* L23 is a low-power PCIe link state */
+static void brcm_pcie_enter_l23(struct brcm_pcie *pcie)
+{
+ void __iomem *base = pcie->base;
+ int l23, i;
+ u32 tmp;
+
+ /* Assert request for L23 */
+ tmp = readl(base + PCIE_MISC_PCIE_CTRL);
+ u32p_replace_bits(&tmp, 1, PCIE_MISC_PCIE_CTRL_PCIE_L23_REQUEST_MASK);
+ writel(tmp, base + PCIE_MISC_PCIE_CTRL);
+
+ /* Wait up to 36 msec for L23 */
+ tmp = readl(base + PCIE_MISC_PCIE_STATUS);
+ l23 = FIELD_GET(PCIE_MISC_PCIE_STATUS_PCIE_LINK_IN_L23_MASK, tmp);
+ for (i = 0; i < 15 && !l23; i++) {
+ usleep_range(2000, 2400);
+ tmp = readl(base + PCIE_MISC_PCIE_STATUS);
+ l23 = FIELD_GET(PCIE_MISC_PCIE_STATUS_PCIE_LINK_IN_L23_MASK,
+ tmp);
+ }
+
+ if (!l23)
+ dev_err(pcie->dev, "failed to enter low-power link state\n");
+}
+
+static void brcm_pcie_turn_off(struct brcm_pcie *pcie)
+{
+ void __iomem *base = pcie->base;
+ int tmp;
+
+ if (brcm_pcie_link_up(pcie))
+ brcm_pcie_enter_l23(pcie);
+ /* Assert fundamental reset */
+ brcm_pcie_perst_set(pcie, 1);
+
+ /* Deassert request for L23 in case it was asserted */
+ tmp = readl(base + PCIE_MISC_PCIE_CTRL);
+ u32p_replace_bits(&tmp, 0, PCIE_MISC_PCIE_CTRL_PCIE_L23_REQUEST_MASK);
+ writel(tmp, base + PCIE_MISC_PCIE_CTRL);
+
+ /* Turn off SerDes */
+ tmp = readl(base + PCIE_MISC_HARD_PCIE_HARD_DEBUG);
+ u32p_replace_bits(&tmp, 1, PCIE_MISC_HARD_PCIE_HARD_DEBUG_SERDES_IDDQ_MASK);
+ writel(tmp, base + PCIE_MISC_HARD_PCIE_HARD_DEBUG);
+
+ /* Shutdown PCIe bridge */
+ brcm_pcie_bridge_sw_init_set(pcie, 1);
+}
+
+static void __brcm_pcie_remove(struct brcm_pcie *pcie)
+{
+ brcm_pcie_turn_off(pcie);
+ clk_disable_unprepare(pcie->clk);
+ clk_put(pcie->clk);
+}
+
+static int brcm_pcie_remove(struct platform_device *pdev)
+{
+ struct brcm_pcie *pcie = platform_get_drvdata(pdev);
+
+ pci_stop_root_bus(pcie->root_bus);
+ pci_remove_root_bus(pcie->root_bus);
+ __brcm_pcie_remove(pcie);
+
+ return 0;
+}
+
+static int brcm_pcie_probe(struct platform_device *pdev)
+{
+ struct device_node *np = pdev->dev.of_node;
+ struct pci_host_bridge *bridge;
+ struct brcm_pcie *pcie;
+ struct pci_bus *child;
+ struct resource *res;
+ int ret;
+
+ bridge = devm_pci_alloc_host_bridge(&pdev->dev, sizeof(*pcie));
+ if (!bridge)
+ return -ENOMEM;
+
+ pcie = pci_host_bridge_priv(bridge);
+ pcie->dev = &pdev->dev;
+ pcie->np = np;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ pcie->base = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(pcie->base))
+ return PTR_ERR(pcie->base);
+
+ pcie->clk = devm_clk_get_optional(&pdev->dev, "sw_pcie");
+ if (IS_ERR(pcie->clk))
+ return PTR_ERR(pcie->clk);
+
+ ret = of_pci_get_max_link_speed(np);
+ pcie->gen = (ret < 0) ? 0 : ret;
+
+ pcie->ssc = of_property_read_bool(np, "brcm,enable-ssc");
+
+ ret = pci_parse_request_of_pci_ranges(pcie->dev, &bridge->windows,
+ &bridge->dma_ranges, NULL);
+ if (ret)
+ return ret;
+
+ ret = clk_prepare_enable(pcie->clk);
+ if (ret) {
+ dev_err(&pdev->dev, "could not enable clock\n");
+ return ret;
+ }
+
+ ret = brcm_pcie_setup(pcie);
+ if (ret)
+ goto fail;
+
+ bridge->dev.parent = &pdev->dev;
+ bridge->busnr = 0;
+ bridge->ops = &brcm_pcie_ops;
+ bridge->sysdata = pcie;
+ bridge->map_irq = of_irq_parse_and_map_pci;
+ bridge->swizzle_irq = pci_common_swizzle;
+
+ ret = pci_scan_root_bus_bridge(bridge);
+ if (ret < 0) {
+ dev_err(pcie->dev, "Scanning root bridge failed\n");
+ goto fail;
+ }
+
+ pci_assign_unassigned_bus_resources(bridge->bus);
+ list_for_each_entry(child, &bridge->bus->children, node)
+ pcie_bus_configure_settings(child);
+ pci_bus_add_devices(bridge->bus);
+ platform_set_drvdata(pdev, pcie);
+ pcie->root_bus = bridge->bus;
+
+ return 0;
+fail:
+ __brcm_pcie_remove(pcie);
+ return ret;
+}
+
+static const struct of_device_id brcm_pcie_match[] = {
+ { .compatible = "brcm,bcm2711-pcie" },
+ {},
+};
+MODULE_DEVICE_TABLE(of, brcm_pcie_match);
+
+static struct platform_driver brcm_pcie_driver = {
+ .probe = brcm_pcie_probe,
+ .remove = brcm_pcie_remove,
+ .driver = {
+ .name = "brcm-pcie",
+ .of_match_table = brcm_pcie_match,
+ },
+};
+module_platform_driver(brcm_pcie_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Broadcom STB PCIe RC driver");
+MODULE_AUTHOR("Broadcom");
--
2.24.0
_______________________________________________
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linux-arm-kernel@lists.infradead.org
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^ permalink raw reply related [flat|nested] 71+ messages in thread
* [PATCH v4 4/8] PCI: brcmstb: Add MSI support
2019-12-03 11:47 ` Nicolas Saenz Julienne
@ 2019-12-03 11:47 ` Nicolas Saenz Julienne
-1 siblings, 0 replies; 71+ messages in thread
From: Nicolas Saenz Julienne @ 2019-12-03 11:47 UTC (permalink / raw)
To: andrew.murray, maz, linux-kernel, Lorenzo Pieralisi, Eric Anholt,
Stefan Wahren, Florian Fainelli, bcm-kernel-feedback-list
Cc: james.quinlan, mbrugger, phil, jeremy.linton, linux-pci,
linux-rpi-kernel, Nicolas Saenz Julienne, Bjorn Helgaas,
linux-arm-kernel
From: Jim Quinlan <james.quinlan@broadcom.com>
This adds MSI support to the Broadcom STB PCIe host controller. The MSI
controller is physically located within the PCIe block, however, there
is no reason why the MSI controller could not be moved elsewhere in the
future. MSIX is not supported by the HW.
Since the internal Brcmstb MSI controller is intertwined with the PCIe
controller, it is not its own platform device but rather part of the
PCIe platform device.
Signed-off-by: Jim Quinlan <james.quinlan@broadcom.com>
Co-developed-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
Reviewed-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Andrew Murray <andrew.murray@arm.com>
---
Changes since v3 (kept Marc's reviewed by as changes seem small enough):
- Use define to access MSI_DATA_CONFIG_VAL
- Update commit message
Changes since v2:
- Use standard APIs on register operations
- Get rid of revision code
- Update rules to msi_target_addr selection
- Remove unwarranted MSI_FLAG_PCI_MSIX
- Small cosmetic changes
Changes since v1:
- Move revision code and some registers to this patch
- Use PCIE_MSI_IRQ_DOMAIN in Kconfig
- Remove redundant register read from ISR
- Fail probe on MSI init error
- Get rid of msi_internal
- Use bitmap family of functions
- Use edge triggered setup
- Add comment regarding MultiMSI
- Simplify compose_msi_msg to avoid reg read
This is based on Jim's original submission[1] with some slight changes
regarding how pcie->msi_target_addr is decided.
[1] https://patchwork.kernel.org/patch/10605955/
drivers/pci/controller/Kconfig | 1 +
drivers/pci/controller/pcie-brcmstb.c | 261 +++++++++++++++++++++++++-
2 files changed, 261 insertions(+), 1 deletion(-)
diff --git a/drivers/pci/controller/Kconfig b/drivers/pci/controller/Kconfig
index 27504f108ee5..918e283bbff1 100644
--- a/drivers/pci/controller/Kconfig
+++ b/drivers/pci/controller/Kconfig
@@ -257,6 +257,7 @@ config PCIE_BRCMSTB
tristate "Broadcom Brcmstb PCIe host controller"
depends on ARCH_BCM2835 || COMPILE_TEST
depends on OF
+ depends on PCI_MSI_IRQ_DOMAIN
help
Say Y here to enable PCIe host controller support for
Broadcom STB based SoCs, like the Raspberry Pi 4.
diff --git a/drivers/pci/controller/pcie-brcmstb.c b/drivers/pci/controller/pcie-brcmstb.c
index dd681164faa0..7ba06a0e1a71 100644
--- a/drivers/pci/controller/pcie-brcmstb.c
+++ b/drivers/pci/controller/pcie-brcmstb.c
@@ -2,6 +2,7 @@
/* Copyright (C) 2009 - 2019 Broadcom */
#include <linux/bitfield.h>
+#include <linux/bitops.h>
#include <linux/clk.h>
#include <linux/compiler.h>
#include <linux/delay.h>
@@ -9,11 +10,13 @@
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/ioport.h>
+#include <linux/irqchip/chained_irq.h>
#include <linux/irqdomain.h>
#include <linux/kernel.h>
#include <linux/list.h>
#include <linux/log2.h>
#include <linux/module.h>
+#include <linux/msi.h>
#include <linux/of_address.h>
#include <linux/of_irq.h>
#include <linux/of_pci.h>
@@ -67,6 +70,12 @@
#define PCIE_MISC_RC_BAR3_CONFIG_LO 0x403c
#define PCIE_MISC_RC_BAR3_CONFIG_LO_SIZE_MASK 0x1f
+#define PCIE_MISC_MSI_BAR_CONFIG_LO 0x4044
+#define PCIE_MISC_MSI_BAR_CONFIG_HI 0x4048
+
+#define PCIE_MISC_MSI_DATA_CONFIG 0x404c
+#define PCIE_MISC_MSI_DATA_CONFIG_VAL 0xffe06540
+
#define PCIE_MISC_PCIE_CTRL 0x4064
#define PCIE_MISC_PCIE_CTRL_PCIE_L23_REQUEST_MASK 0x1
@@ -114,6 +123,11 @@
/* PCIe parameters */
#define BRCM_NUM_PCIE_OUT_WINS 0x4
+#define BRCM_INT_PCI_MSI_NR 32
+
+/* MSI target adresses */
+#define BRCM_MSI_TARGET_ADDR_LT_4GB 0x0fffffffcULL
+#define BRCM_MSI_TARGET_ADDR_GT_4GB 0xffffffffcULL
/* MDIO registers */
#define MDIO_PORT0 0x0
@@ -135,6 +149,19 @@
#define SSC_STATUS_SSC_MASK 0x400
#define SSC_STATUS_PLL_LOCK_MASK 0x800
+struct brcm_msi {
+ struct device *dev;
+ void __iomem *base;
+ struct device_node *np;
+ struct irq_domain *msi_domain;
+ struct irq_domain *inner_domain;
+ struct mutex lock; /* guards the alloc/free operations */
+ u64 target_addr;
+ int irq;
+ /* used indicates which MSI interrupts have been alloc'd */
+ unsigned long used;
+};
+
/* Internal PCIe Host Controller Information.*/
struct brcm_pcie {
struct device *dev;
@@ -144,6 +171,8 @@ struct brcm_pcie {
struct device_node *np;
bool ssc;
int gen;
+ u64 msi_target_addr;
+ struct brcm_msi *msi;
};
/*
@@ -309,6 +338,214 @@ static void brcm_pcie_set_outbound_win(struct brcm_pcie *pcie,
writel(tmp, pcie->base + PCIE_MEM_WIN0_LIMIT_HI(win));
}
+static struct irq_chip brcm_msi_irq_chip = {
+ .name = "BRCM STB PCIe MSI",
+ .irq_ack = irq_chip_ack_parent,
+ .irq_mask = pci_msi_mask_irq,
+ .irq_unmask = pci_msi_unmask_irq,
+};
+
+static struct msi_domain_info brcm_msi_domain_info = {
+ /* Multi MSI is supported by the controller, but not by this driver */
+ .flags = (MSI_FLAG_USE_DEF_DOM_OPS | MSI_FLAG_USE_DEF_CHIP_OPS),
+ .chip = &brcm_msi_irq_chip,
+};
+
+static void brcm_pcie_msi_isr(struct irq_desc *desc)
+{
+ struct irq_chip *chip = irq_desc_get_chip(desc);
+ unsigned long status, virq;
+ struct brcm_msi *msi;
+ struct device *dev;
+ u32 bit;
+
+ chained_irq_enter(chip, desc);
+ msi = irq_desc_get_handler_data(desc);
+ dev = msi->dev;
+
+ status = readl(msi->base + PCIE_MSI_INTR2_STATUS);
+ for_each_set_bit(bit, &status, BRCM_INT_PCI_MSI_NR) {
+ virq = irq_find_mapping(msi->inner_domain, bit);
+ if (virq)
+ generic_handle_irq(virq);
+ else
+ dev_dbg(dev, "unexpected MSI\n");
+ }
+
+ chained_irq_exit(chip, desc);
+}
+
+static void brcm_msi_compose_msi_msg(struct irq_data *data, struct msi_msg *msg)
+{
+ struct brcm_msi *msi = irq_data_get_irq_chip_data(data);
+
+ msg->address_lo = lower_32_bits(msi->target_addr);
+ msg->address_hi = upper_32_bits(msi->target_addr);
+ msg->data = (0xffff & PCIE_MISC_MSI_DATA_CONFIG_VAL) | data->hwirq;
+}
+
+static int brcm_msi_set_affinity(struct irq_data *irq_data,
+ const struct cpumask *mask, bool force)
+{
+ return -EINVAL;
+}
+
+static void brcm_msi_ack_irq(struct irq_data *data)
+{
+ struct brcm_msi *msi = irq_data_get_irq_chip_data(data);
+
+ writel(1 << data->hwirq, msi->base + PCIE_MSI_INTR2_CLR);
+}
+
+
+static struct irq_chip brcm_msi_bottom_irq_chip = {
+ .name = "BRCM STB MSI",
+ .irq_compose_msi_msg = brcm_msi_compose_msi_msg,
+ .irq_set_affinity = brcm_msi_set_affinity,
+ .irq_ack = brcm_msi_ack_irq,
+};
+
+static int brcm_msi_alloc(struct brcm_msi *msi)
+{
+ int hwirq;
+
+ mutex_lock(&msi->lock);
+ hwirq = bitmap_find_free_region(&msi->used, BRCM_INT_PCI_MSI_NR, 0);
+ mutex_unlock(&msi->lock);
+
+ return hwirq;
+}
+
+static void brcm_msi_free(struct brcm_msi *msi, unsigned long hwirq)
+{
+ mutex_lock(&msi->lock);
+ bitmap_release_region(&msi->used, hwirq, 0);
+ mutex_unlock(&msi->lock);
+}
+
+static int brcm_irq_domain_alloc(struct irq_domain *domain, unsigned int virq,
+ unsigned int nr_irqs, void *args)
+{
+ struct brcm_msi *msi = domain->host_data;
+ int hwirq;
+
+ hwirq = brcm_msi_alloc(msi);
+
+ if (hwirq < 0)
+ return hwirq;
+
+ irq_domain_set_info(domain, virq, (irq_hw_number_t)hwirq,
+ &brcm_msi_bottom_irq_chip, domain->host_data,
+ handle_edge_irq, NULL, NULL);
+ return 0;
+}
+
+static void brcm_irq_domain_free(struct irq_domain *domain,
+ unsigned int virq, unsigned int nr_irqs)
+{
+ struct irq_data *d = irq_domain_get_irq_data(domain, virq);
+ struct brcm_msi *msi = irq_data_get_irq_chip_data(d);
+
+ brcm_msi_free(msi, d->hwirq);
+}
+
+static const struct irq_domain_ops msi_domain_ops = {
+ .alloc = brcm_irq_domain_alloc,
+ .free = brcm_irq_domain_free,
+};
+
+static int brcm_allocate_domains(struct brcm_msi *msi)
+{
+ struct fwnode_handle *fwnode = of_node_to_fwnode(msi->np);
+ struct device *dev = msi->dev;
+
+ msi->inner_domain = irq_domain_add_linear(NULL, BRCM_INT_PCI_MSI_NR,
+ &msi_domain_ops, msi);
+ if (!msi->inner_domain) {
+ dev_err(dev, "failed to create IRQ domain\n");
+ return -ENOMEM;
+ }
+
+ msi->msi_domain = pci_msi_create_irq_domain(fwnode,
+ &brcm_msi_domain_info,
+ msi->inner_domain);
+ if (!msi->msi_domain) {
+ dev_err(dev, "failed to create MSI domain\n");
+ irq_domain_remove(msi->inner_domain);
+ return -ENOMEM;
+ }
+
+ return 0;
+}
+
+static void brcm_free_domains(struct brcm_msi *msi)
+{
+ irq_domain_remove(msi->msi_domain);
+ irq_domain_remove(msi->inner_domain);
+}
+
+static void brcm_msi_remove(struct brcm_pcie *pcie)
+{
+ struct brcm_msi *msi = pcie->msi;
+
+ if (!msi)
+ return;
+ irq_set_chained_handler(msi->irq, NULL);
+ irq_set_handler_data(msi->irq, NULL);
+ brcm_free_domains(msi);
+}
+
+static void brcm_msi_set_regs(struct brcm_msi *msi)
+{
+ writel(0xffffffff, msi->base + PCIE_MSI_INTR2_MASK_CLR);
+
+ /*
+ * The 0 bit of PCIE_MISC_MSI_BAR_CONFIG_LO is repurposed to MSI
+ * enable, which we set to 1.
+ */
+ writel(lower_32_bits(msi->target_addr) | 0x1,
+ msi->base + PCIE_MISC_MSI_BAR_CONFIG_LO);
+ writel(upper_32_bits(msi->target_addr),
+ msi->base + PCIE_MISC_MSI_BAR_CONFIG_HI);
+
+ writel(PCIE_MISC_MSI_DATA_CONFIG_VAL,
+ msi->base + PCIE_MISC_MSI_DATA_CONFIG);
+}
+
+static int brcm_pcie_enable_msi(struct brcm_pcie *pcie)
+{
+ struct brcm_msi *msi;
+ int irq, ret;
+ struct device *dev = pcie->dev;
+
+ irq = irq_of_parse_and_map(dev->of_node, 1);
+ if (irq <= 0) {
+ dev_err(dev, "cannot map MSI interrupt\n");
+ return -ENODEV;
+ }
+
+ msi = devm_kzalloc(dev, sizeof(struct brcm_msi), GFP_KERNEL);
+ if (!msi)
+ return -ENOMEM;
+
+ msi->dev = dev;
+ msi->base = pcie->base;
+ msi->np = pcie->np;
+ msi->target_addr = pcie->msi_target_addr;
+ msi->irq = irq;
+
+ ret = brcm_allocate_domains(msi);
+ if (ret)
+ return ret;
+
+ irq_set_chained_handler_and_data(msi->irq, brcm_pcie_msi_isr, msi);
+
+ brcm_msi_set_regs(msi);
+ pcie->msi = msi;
+
+ return 0;
+}
+
/* The controller is capable of serving in both RC and EP roles */
static bool brcm_pcie_rc_mode(struct brcm_pcie *pcie)
{
@@ -490,6 +727,18 @@ static int brcm_pcie_setup(struct brcm_pcie *pcie)
PCIE_MISC_MISC_CTRL_SCB0_SIZE_MASK);
writel(tmp, base + PCIE_MISC_MISC_CTRL);
+ /*
+ * We ideally want the MSI target address to be located in the 32bit
+ * addressable memory area. Some devices might depend on it. This is
+ * possible either when the inbound window is located above the lower
+ * 4GB or when the inbound area is smaller than 4GB (taking into
+ * account the rounding-up we're forced to perform).
+ */
+ if (rc_bar2_offset >= SZ_4G || (rc_bar2_size + rc_bar2_offset) < SZ_4G)
+ pcie->msi_target_addr = BRCM_MSI_TARGET_ADDR_LT_4GB;
+ else
+ pcie->msi_target_addr = BRCM_MSI_TARGET_ADDR_GT_4GB;
+
/* disable the PCIe->GISB memory window (RC_BAR1) */
tmp = readl(base + PCIE_MISC_RC_BAR1_CONFIG_LO);
tmp &= ~PCIE_MISC_RC_BAR1_CONFIG_LO_SIZE_MASK;
@@ -639,6 +888,7 @@ static void brcm_pcie_turn_off(struct brcm_pcie *pcie)
static void __brcm_pcie_remove(struct brcm_pcie *pcie)
{
+ brcm_msi_remove(pcie);
brcm_pcie_turn_off(pcie);
clk_disable_unprepare(pcie->clk);
clk_put(pcie->clk);
@@ -657,7 +907,7 @@ static int brcm_pcie_remove(struct platform_device *pdev)
static int brcm_pcie_probe(struct platform_device *pdev)
{
- struct device_node *np = pdev->dev.of_node;
+ struct device_node *np = pdev->dev.of_node, *msi_np;
struct pci_host_bridge *bridge;
struct brcm_pcie *pcie;
struct pci_bus *child;
@@ -701,6 +951,15 @@ static int brcm_pcie_probe(struct platform_device *pdev)
if (ret)
goto fail;
+ msi_np = of_parse_phandle(pcie->np, "msi-parent", 0);
+ if (pci_msi_enabled() && msi_np == pcie->np) {
+ ret = brcm_pcie_enable_msi(pcie);
+ if (ret) {
+ dev_err(pcie->dev, "probe of internal MSI failed");
+ goto fail;
+ }
+ }
+
bridge->dev.parent = &pdev->dev;
bridge->busnr = 0;
bridge->ops = &brcm_pcie_ops;
--
2.24.0
^ permalink raw reply related [flat|nested] 71+ messages in thread
* [PATCH v4 4/8] PCI: brcmstb: Add MSI support
@ 2019-12-03 11:47 ` Nicolas Saenz Julienne
0 siblings, 0 replies; 71+ messages in thread
From: Nicolas Saenz Julienne @ 2019-12-03 11:47 UTC (permalink / raw)
To: andrew.murray, maz, linux-kernel, Lorenzo Pieralisi, Eric Anholt,
Stefan Wahren, Florian Fainelli, bcm-kernel-feedback-list
Cc: linux-arm-kernel, mbrugger, linux-pci, phil, jeremy.linton,
linux-rpi-kernel, james.quinlan, Bjorn Helgaas,
Nicolas Saenz Julienne
From: Jim Quinlan <james.quinlan@broadcom.com>
This adds MSI support to the Broadcom STB PCIe host controller. The MSI
controller is physically located within the PCIe block, however, there
is no reason why the MSI controller could not be moved elsewhere in the
future. MSIX is not supported by the HW.
Since the internal Brcmstb MSI controller is intertwined with the PCIe
controller, it is not its own platform device but rather part of the
PCIe platform device.
Signed-off-by: Jim Quinlan <james.quinlan@broadcom.com>
Co-developed-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
Reviewed-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Andrew Murray <andrew.murray@arm.com>
---
Changes since v3 (kept Marc's reviewed by as changes seem small enough):
- Use define to access MSI_DATA_CONFIG_VAL
- Update commit message
Changes since v2:
- Use standard APIs on register operations
- Get rid of revision code
- Update rules to msi_target_addr selection
- Remove unwarranted MSI_FLAG_PCI_MSIX
- Small cosmetic changes
Changes since v1:
- Move revision code and some registers to this patch
- Use PCIE_MSI_IRQ_DOMAIN in Kconfig
- Remove redundant register read from ISR
- Fail probe on MSI init error
- Get rid of msi_internal
- Use bitmap family of functions
- Use edge triggered setup
- Add comment regarding MultiMSI
- Simplify compose_msi_msg to avoid reg read
This is based on Jim's original submission[1] with some slight changes
regarding how pcie->msi_target_addr is decided.
[1] https://patchwork.kernel.org/patch/10605955/
drivers/pci/controller/Kconfig | 1 +
drivers/pci/controller/pcie-brcmstb.c | 261 +++++++++++++++++++++++++-
2 files changed, 261 insertions(+), 1 deletion(-)
diff --git a/drivers/pci/controller/Kconfig b/drivers/pci/controller/Kconfig
index 27504f108ee5..918e283bbff1 100644
--- a/drivers/pci/controller/Kconfig
+++ b/drivers/pci/controller/Kconfig
@@ -257,6 +257,7 @@ config PCIE_BRCMSTB
tristate "Broadcom Brcmstb PCIe host controller"
depends on ARCH_BCM2835 || COMPILE_TEST
depends on OF
+ depends on PCI_MSI_IRQ_DOMAIN
help
Say Y here to enable PCIe host controller support for
Broadcom STB based SoCs, like the Raspberry Pi 4.
diff --git a/drivers/pci/controller/pcie-brcmstb.c b/drivers/pci/controller/pcie-brcmstb.c
index dd681164faa0..7ba06a0e1a71 100644
--- a/drivers/pci/controller/pcie-brcmstb.c
+++ b/drivers/pci/controller/pcie-brcmstb.c
@@ -2,6 +2,7 @@
/* Copyright (C) 2009 - 2019 Broadcom */
#include <linux/bitfield.h>
+#include <linux/bitops.h>
#include <linux/clk.h>
#include <linux/compiler.h>
#include <linux/delay.h>
@@ -9,11 +10,13 @@
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/ioport.h>
+#include <linux/irqchip/chained_irq.h>
#include <linux/irqdomain.h>
#include <linux/kernel.h>
#include <linux/list.h>
#include <linux/log2.h>
#include <linux/module.h>
+#include <linux/msi.h>
#include <linux/of_address.h>
#include <linux/of_irq.h>
#include <linux/of_pci.h>
@@ -67,6 +70,12 @@
#define PCIE_MISC_RC_BAR3_CONFIG_LO 0x403c
#define PCIE_MISC_RC_BAR3_CONFIG_LO_SIZE_MASK 0x1f
+#define PCIE_MISC_MSI_BAR_CONFIG_LO 0x4044
+#define PCIE_MISC_MSI_BAR_CONFIG_HI 0x4048
+
+#define PCIE_MISC_MSI_DATA_CONFIG 0x404c
+#define PCIE_MISC_MSI_DATA_CONFIG_VAL 0xffe06540
+
#define PCIE_MISC_PCIE_CTRL 0x4064
#define PCIE_MISC_PCIE_CTRL_PCIE_L23_REQUEST_MASK 0x1
@@ -114,6 +123,11 @@
/* PCIe parameters */
#define BRCM_NUM_PCIE_OUT_WINS 0x4
+#define BRCM_INT_PCI_MSI_NR 32
+
+/* MSI target adresses */
+#define BRCM_MSI_TARGET_ADDR_LT_4GB 0x0fffffffcULL
+#define BRCM_MSI_TARGET_ADDR_GT_4GB 0xffffffffcULL
/* MDIO registers */
#define MDIO_PORT0 0x0
@@ -135,6 +149,19 @@
#define SSC_STATUS_SSC_MASK 0x400
#define SSC_STATUS_PLL_LOCK_MASK 0x800
+struct brcm_msi {
+ struct device *dev;
+ void __iomem *base;
+ struct device_node *np;
+ struct irq_domain *msi_domain;
+ struct irq_domain *inner_domain;
+ struct mutex lock; /* guards the alloc/free operations */
+ u64 target_addr;
+ int irq;
+ /* used indicates which MSI interrupts have been alloc'd */
+ unsigned long used;
+};
+
/* Internal PCIe Host Controller Information.*/
struct brcm_pcie {
struct device *dev;
@@ -144,6 +171,8 @@ struct brcm_pcie {
struct device_node *np;
bool ssc;
int gen;
+ u64 msi_target_addr;
+ struct brcm_msi *msi;
};
/*
@@ -309,6 +338,214 @@ static void brcm_pcie_set_outbound_win(struct brcm_pcie *pcie,
writel(tmp, pcie->base + PCIE_MEM_WIN0_LIMIT_HI(win));
}
+static struct irq_chip brcm_msi_irq_chip = {
+ .name = "BRCM STB PCIe MSI",
+ .irq_ack = irq_chip_ack_parent,
+ .irq_mask = pci_msi_mask_irq,
+ .irq_unmask = pci_msi_unmask_irq,
+};
+
+static struct msi_domain_info brcm_msi_domain_info = {
+ /* Multi MSI is supported by the controller, but not by this driver */
+ .flags = (MSI_FLAG_USE_DEF_DOM_OPS | MSI_FLAG_USE_DEF_CHIP_OPS),
+ .chip = &brcm_msi_irq_chip,
+};
+
+static void brcm_pcie_msi_isr(struct irq_desc *desc)
+{
+ struct irq_chip *chip = irq_desc_get_chip(desc);
+ unsigned long status, virq;
+ struct brcm_msi *msi;
+ struct device *dev;
+ u32 bit;
+
+ chained_irq_enter(chip, desc);
+ msi = irq_desc_get_handler_data(desc);
+ dev = msi->dev;
+
+ status = readl(msi->base + PCIE_MSI_INTR2_STATUS);
+ for_each_set_bit(bit, &status, BRCM_INT_PCI_MSI_NR) {
+ virq = irq_find_mapping(msi->inner_domain, bit);
+ if (virq)
+ generic_handle_irq(virq);
+ else
+ dev_dbg(dev, "unexpected MSI\n");
+ }
+
+ chained_irq_exit(chip, desc);
+}
+
+static void brcm_msi_compose_msi_msg(struct irq_data *data, struct msi_msg *msg)
+{
+ struct brcm_msi *msi = irq_data_get_irq_chip_data(data);
+
+ msg->address_lo = lower_32_bits(msi->target_addr);
+ msg->address_hi = upper_32_bits(msi->target_addr);
+ msg->data = (0xffff & PCIE_MISC_MSI_DATA_CONFIG_VAL) | data->hwirq;
+}
+
+static int brcm_msi_set_affinity(struct irq_data *irq_data,
+ const struct cpumask *mask, bool force)
+{
+ return -EINVAL;
+}
+
+static void brcm_msi_ack_irq(struct irq_data *data)
+{
+ struct brcm_msi *msi = irq_data_get_irq_chip_data(data);
+
+ writel(1 << data->hwirq, msi->base + PCIE_MSI_INTR2_CLR);
+}
+
+
+static struct irq_chip brcm_msi_bottom_irq_chip = {
+ .name = "BRCM STB MSI",
+ .irq_compose_msi_msg = brcm_msi_compose_msi_msg,
+ .irq_set_affinity = brcm_msi_set_affinity,
+ .irq_ack = brcm_msi_ack_irq,
+};
+
+static int brcm_msi_alloc(struct brcm_msi *msi)
+{
+ int hwirq;
+
+ mutex_lock(&msi->lock);
+ hwirq = bitmap_find_free_region(&msi->used, BRCM_INT_PCI_MSI_NR, 0);
+ mutex_unlock(&msi->lock);
+
+ return hwirq;
+}
+
+static void brcm_msi_free(struct brcm_msi *msi, unsigned long hwirq)
+{
+ mutex_lock(&msi->lock);
+ bitmap_release_region(&msi->used, hwirq, 0);
+ mutex_unlock(&msi->lock);
+}
+
+static int brcm_irq_domain_alloc(struct irq_domain *domain, unsigned int virq,
+ unsigned int nr_irqs, void *args)
+{
+ struct brcm_msi *msi = domain->host_data;
+ int hwirq;
+
+ hwirq = brcm_msi_alloc(msi);
+
+ if (hwirq < 0)
+ return hwirq;
+
+ irq_domain_set_info(domain, virq, (irq_hw_number_t)hwirq,
+ &brcm_msi_bottom_irq_chip, domain->host_data,
+ handle_edge_irq, NULL, NULL);
+ return 0;
+}
+
+static void brcm_irq_domain_free(struct irq_domain *domain,
+ unsigned int virq, unsigned int nr_irqs)
+{
+ struct irq_data *d = irq_domain_get_irq_data(domain, virq);
+ struct brcm_msi *msi = irq_data_get_irq_chip_data(d);
+
+ brcm_msi_free(msi, d->hwirq);
+}
+
+static const struct irq_domain_ops msi_domain_ops = {
+ .alloc = brcm_irq_domain_alloc,
+ .free = brcm_irq_domain_free,
+};
+
+static int brcm_allocate_domains(struct brcm_msi *msi)
+{
+ struct fwnode_handle *fwnode = of_node_to_fwnode(msi->np);
+ struct device *dev = msi->dev;
+
+ msi->inner_domain = irq_domain_add_linear(NULL, BRCM_INT_PCI_MSI_NR,
+ &msi_domain_ops, msi);
+ if (!msi->inner_domain) {
+ dev_err(dev, "failed to create IRQ domain\n");
+ return -ENOMEM;
+ }
+
+ msi->msi_domain = pci_msi_create_irq_domain(fwnode,
+ &brcm_msi_domain_info,
+ msi->inner_domain);
+ if (!msi->msi_domain) {
+ dev_err(dev, "failed to create MSI domain\n");
+ irq_domain_remove(msi->inner_domain);
+ return -ENOMEM;
+ }
+
+ return 0;
+}
+
+static void brcm_free_domains(struct brcm_msi *msi)
+{
+ irq_domain_remove(msi->msi_domain);
+ irq_domain_remove(msi->inner_domain);
+}
+
+static void brcm_msi_remove(struct brcm_pcie *pcie)
+{
+ struct brcm_msi *msi = pcie->msi;
+
+ if (!msi)
+ return;
+ irq_set_chained_handler(msi->irq, NULL);
+ irq_set_handler_data(msi->irq, NULL);
+ brcm_free_domains(msi);
+}
+
+static void brcm_msi_set_regs(struct brcm_msi *msi)
+{
+ writel(0xffffffff, msi->base + PCIE_MSI_INTR2_MASK_CLR);
+
+ /*
+ * The 0 bit of PCIE_MISC_MSI_BAR_CONFIG_LO is repurposed to MSI
+ * enable, which we set to 1.
+ */
+ writel(lower_32_bits(msi->target_addr) | 0x1,
+ msi->base + PCIE_MISC_MSI_BAR_CONFIG_LO);
+ writel(upper_32_bits(msi->target_addr),
+ msi->base + PCIE_MISC_MSI_BAR_CONFIG_HI);
+
+ writel(PCIE_MISC_MSI_DATA_CONFIG_VAL,
+ msi->base + PCIE_MISC_MSI_DATA_CONFIG);
+}
+
+static int brcm_pcie_enable_msi(struct brcm_pcie *pcie)
+{
+ struct brcm_msi *msi;
+ int irq, ret;
+ struct device *dev = pcie->dev;
+
+ irq = irq_of_parse_and_map(dev->of_node, 1);
+ if (irq <= 0) {
+ dev_err(dev, "cannot map MSI interrupt\n");
+ return -ENODEV;
+ }
+
+ msi = devm_kzalloc(dev, sizeof(struct brcm_msi), GFP_KERNEL);
+ if (!msi)
+ return -ENOMEM;
+
+ msi->dev = dev;
+ msi->base = pcie->base;
+ msi->np = pcie->np;
+ msi->target_addr = pcie->msi_target_addr;
+ msi->irq = irq;
+
+ ret = brcm_allocate_domains(msi);
+ if (ret)
+ return ret;
+
+ irq_set_chained_handler_and_data(msi->irq, brcm_pcie_msi_isr, msi);
+
+ brcm_msi_set_regs(msi);
+ pcie->msi = msi;
+
+ return 0;
+}
+
/* The controller is capable of serving in both RC and EP roles */
static bool brcm_pcie_rc_mode(struct brcm_pcie *pcie)
{
@@ -490,6 +727,18 @@ static int brcm_pcie_setup(struct brcm_pcie *pcie)
PCIE_MISC_MISC_CTRL_SCB0_SIZE_MASK);
writel(tmp, base + PCIE_MISC_MISC_CTRL);
+ /*
+ * We ideally want the MSI target address to be located in the 32bit
+ * addressable memory area. Some devices might depend on it. This is
+ * possible either when the inbound window is located above the lower
+ * 4GB or when the inbound area is smaller than 4GB (taking into
+ * account the rounding-up we're forced to perform).
+ */
+ if (rc_bar2_offset >= SZ_4G || (rc_bar2_size + rc_bar2_offset) < SZ_4G)
+ pcie->msi_target_addr = BRCM_MSI_TARGET_ADDR_LT_4GB;
+ else
+ pcie->msi_target_addr = BRCM_MSI_TARGET_ADDR_GT_4GB;
+
/* disable the PCIe->GISB memory window (RC_BAR1) */
tmp = readl(base + PCIE_MISC_RC_BAR1_CONFIG_LO);
tmp &= ~PCIE_MISC_RC_BAR1_CONFIG_LO_SIZE_MASK;
@@ -639,6 +888,7 @@ static void brcm_pcie_turn_off(struct brcm_pcie *pcie)
static void __brcm_pcie_remove(struct brcm_pcie *pcie)
{
+ brcm_msi_remove(pcie);
brcm_pcie_turn_off(pcie);
clk_disable_unprepare(pcie->clk);
clk_put(pcie->clk);
@@ -657,7 +907,7 @@ static int brcm_pcie_remove(struct platform_device *pdev)
static int brcm_pcie_probe(struct platform_device *pdev)
{
- struct device_node *np = pdev->dev.of_node;
+ struct device_node *np = pdev->dev.of_node, *msi_np;
struct pci_host_bridge *bridge;
struct brcm_pcie *pcie;
struct pci_bus *child;
@@ -701,6 +951,15 @@ static int brcm_pcie_probe(struct platform_device *pdev)
if (ret)
goto fail;
+ msi_np = of_parse_phandle(pcie->np, "msi-parent", 0);
+ if (pci_msi_enabled() && msi_np == pcie->np) {
+ ret = brcm_pcie_enable_msi(pcie);
+ if (ret) {
+ dev_err(pcie->dev, "probe of internal MSI failed");
+ goto fail;
+ }
+ }
+
bridge->dev.parent = &pdev->dev;
bridge->busnr = 0;
bridge->ops = &brcm_pcie_ops;
--
2.24.0
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply related [flat|nested] 71+ messages in thread
* [PATCH v4 5/8] MAINTAINERS: Add brcmstb PCIe controller
2019-12-03 11:47 ` Nicolas Saenz Julienne
` (6 preceding siblings ...)
(?)
@ 2019-12-03 11:47 ` Nicolas Saenz Julienne
-1 siblings, 0 replies; 71+ messages in thread
From: Nicolas Saenz Julienne @ 2019-12-03 11:47 UTC (permalink / raw)
To: andrew.murray, maz, linux-kernel
Cc: james.quinlan, mbrugger, f.fainelli, phil, wahrenst,
jeremy.linton, linux-pci, linux-rpi-kernel,
Nicolas Saenz Julienne
The controller serves both the Raspberry Pi 4 (bcm2711) and brcmstb
platforms.
Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
---
MAINTAINERS | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/MAINTAINERS b/MAINTAINERS
index b8fa7652a736..69955fc47a54 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -3238,6 +3238,8 @@ S: Maintained
N: bcm2711
N: bcm2835
F: drivers/staging/vc04_services
+F: Documentation/devicetree/bindings/pci/brcm,stb-pcie.yaml
+F: drivers/pci/controller/pcie-brcmstb.c
BROADCOM BCM47XX MIPS ARCHITECTURE
M: Hauke Mehrtens <hauke@hauke-m.de>
@@ -3293,6 +3295,8 @@ F: drivers/bus/brcmstb_gisb.c
F: arch/arm/mm/cache-b15-rac.c
F: arch/arm/include/asm/hardware/cache-b15-rac.h
N: brcmstb
+F: Documentation/devicetree/bindings/pci/brcm,stb-pcie.yaml
+F: drivers/pci/controller/pcie-brcmstb.c
BROADCOM BMIPS CPUFREQ DRIVER
M: Markus Mayer <mmayer@broadcom.com>
--
2.24.0
^ permalink raw reply related [flat|nested] 71+ messages in thread
* [PATCH v4 6/8] arm64: defconfig: Enable Broadcom's STB PCIe controller
2019-12-03 11:47 ` Nicolas Saenz Julienne
@ 2019-12-03 11:47 ` Nicolas Saenz Julienne
-1 siblings, 0 replies; 71+ messages in thread
From: Nicolas Saenz Julienne @ 2019-12-03 11:47 UTC (permalink / raw)
To: andrew.murray, maz, linux-kernel
Cc: james.quinlan, mbrugger, f.fainelli, phil, wahrenst,
jeremy.linton, linux-pci, linux-rpi-kernel,
Nicolas Saenz Julienne, Catalin Marinas, Will Deacon,
linux-arm-kernel
For now mainly used in the Raspberry Pi 4.
Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
---
arch/arm64/configs/defconfig | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/arm64/configs/defconfig b/arch/arm64/configs/defconfig
index 7fa92defb964..dfd578129780 100644
--- a/arch/arm64/configs/defconfig
+++ b/arch/arm64/configs/defconfig
@@ -198,6 +198,7 @@ CONFIG_PCIE_ALTERA_MSI=y
CONFIG_PCI_HOST_THUNDER_PEM=y
CONFIG_PCI_HOST_THUNDER_ECAM=y
CONFIG_PCIE_ROCKCHIP_HOST=m
+CONFIG_PCIE_BRCMSTB=m
CONFIG_PCI_LAYERSCAPE=y
CONFIG_PCI_HISI=y
CONFIG_PCIE_QCOM=y
--
2.24.0
^ permalink raw reply related [flat|nested] 71+ messages in thread
* [PATCH v4 6/8] arm64: defconfig: Enable Broadcom's STB PCIe controller
@ 2019-12-03 11:47 ` Nicolas Saenz Julienne
0 siblings, 0 replies; 71+ messages in thread
From: Nicolas Saenz Julienne @ 2019-12-03 11:47 UTC (permalink / raw)
To: andrew.murray, maz, linux-kernel
Cc: linux-arm-kernel, f.fainelli, linux-pci, phil, jeremy.linton,
mbrugger, wahrenst, james.quinlan, Catalin Marinas, Will Deacon,
Nicolas Saenz Julienne, linux-rpi-kernel
For now mainly used in the Raspberry Pi 4.
Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
---
arch/arm64/configs/defconfig | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/arm64/configs/defconfig b/arch/arm64/configs/defconfig
index 7fa92defb964..dfd578129780 100644
--- a/arch/arm64/configs/defconfig
+++ b/arch/arm64/configs/defconfig
@@ -198,6 +198,7 @@ CONFIG_PCIE_ALTERA_MSI=y
CONFIG_PCI_HOST_THUNDER_PEM=y
CONFIG_PCI_HOST_THUNDER_ECAM=y
CONFIG_PCIE_ROCKCHIP_HOST=m
+CONFIG_PCIE_BRCMSTB=m
CONFIG_PCI_LAYERSCAPE=y
CONFIG_PCI_HISI=y
CONFIG_PCIE_QCOM=y
--
2.24.0
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply related [flat|nested] 71+ messages in thread
* [PATCH v4 7/8] linux/log2.h: Fix 64bit calculations in roundup/down_pow_two()
2019-12-03 11:47 ` Nicolas Saenz Julienne
(?)
@ 2019-12-03 11:47 ` Nicolas Saenz Julienne
-1 siblings, 0 replies; 71+ messages in thread
From: Nicolas Saenz Julienne @ 2019-12-03 11:47 UTC (permalink / raw)
To: andrew.murray, maz, linux-kernel, Michael Turquette,
Stephen Boyd, Emilio López, Maxime Ripard, Chen-Yu Tsai,
Mike Marciniszyn, Dennis Dalessandro, Yishai Hadas, Moni Shoua,
David Woodhouse, Lu Baolu, Joerg Roedel, Tom Lendacky,
Mirko Lindner, Stephen Hemminger, Jiri Pirko,
Solarflare linux maintainers, Edward Cree, Martin Habets,
Bjorn Helgaas, Eric Biederman, Thomas Graf, Herbert Xu
Cc: james.quinlan, mbrugger, f.fainelli, phil, wahrenst,
jeremy.linton, linux-pci, linux-rpi-kernel,
Nicolas Saenz Julienne, Robin Murphy, Doug Ledford,
Jason Gunthorpe, David S. Miller, Trond Myklebust,
Anna Schumaker, J. Bruce Fields, Chuck Lever, linux-clk,
linux-arm-kernel, linux-rdma, iommu, netdev, kexec, linux-nfs
Some users need to make sure their rounding function accepts and returns
64bit long variables regardless of the architecture. Sadly
roundup/rounddown_pow_two() takes and returns unsigned longs. It turns
out ilog2() already handles 32/64bit calculations properly, and being
the building block to the round functions we can rework them as a
wrapper around it.
Suggested-by: Robin Murphy <robin.murphy@arm.con>
Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
---
drivers/clk/clk-divider.c | 8 ++--
drivers/clk/sunxi/clk-sunxi.c | 2 +-
drivers/infiniband/hw/hfi1/chip.c | 4 +-
drivers/infiniband/hw/hfi1/init.c | 4 +-
drivers/infiniband/hw/mlx4/srq.c | 2 +-
drivers/infiniband/hw/mthca/mthca_srq.c | 2 +-
drivers/infiniband/sw/rxe/rxe_qp.c | 4 +-
drivers/iommu/intel-iommu.c | 4 +-
drivers/iommu/intel-svm.c | 4 +-
drivers/iommu/intel_irq_remapping.c | 2 +-
drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c | 4 +-
drivers/net/ethernet/marvell/sky2.c | 2 +-
drivers/net/ethernet/rocker/rocker_hw.h | 4 +-
drivers/net/ethernet/sfc/ef10.c | 2 +-
drivers/net/ethernet/sfc/efx.h | 2 +-
drivers/net/ethernet/sfc/falcon/efx.h | 2 +-
drivers/pci/msi.c | 2 +-
include/linux/log2.h | 44 +++++---------------
kernel/kexec_core.c | 3 +-
lib/rhashtable.c | 2 +-
net/sunrpc/xprtrdma/verbs.c | 2 +-
21 files changed, 41 insertions(+), 64 deletions(-)
diff --git a/drivers/clk/clk-divider.c b/drivers/clk/clk-divider.c
index 098b2b01f0af..ba947e4c8193 100644
--- a/drivers/clk/clk-divider.c
+++ b/drivers/clk/clk-divider.c
@@ -222,7 +222,7 @@ static int _div_round_up(const struct clk_div_table *table,
int div = DIV_ROUND_UP_ULL((u64)parent_rate, rate);
if (flags & CLK_DIVIDER_POWER_OF_TWO)
- div = __roundup_pow_of_two(div);
+ div = roundup_pow_of_two(div);
if (table)
div = _round_up_table(table, div);
@@ -240,8 +240,8 @@ static int _div_round_closest(const struct clk_div_table *table,
down = parent_rate / rate;
if (flags & CLK_DIVIDER_POWER_OF_TWO) {
- up = __roundup_pow_of_two(up);
- down = __rounddown_pow_of_two(down);
+ up = roundup_pow_of_two(up);
+ down = rounddown_pow_of_two(down);
} else if (table) {
up = _round_up_table(table, up);
down = _round_down_table(table, down);
@@ -278,7 +278,7 @@ static int _next_div(const struct clk_div_table *table, int div,
div++;
if (flags & CLK_DIVIDER_POWER_OF_TWO)
- return __roundup_pow_of_two(div);
+ return roundup_pow_of_two(div);
if (table)
return _round_up_table(table, div);
diff --git a/drivers/clk/sunxi/clk-sunxi.c b/drivers/clk/sunxi/clk-sunxi.c
index 27201fd26e44..faec99dc09c0 100644
--- a/drivers/clk/sunxi/clk-sunxi.c
+++ b/drivers/clk/sunxi/clk-sunxi.c
@@ -311,7 +311,7 @@ static void sun6i_get_ahb1_factors(struct factors_request *req)
calcm = DIV_ROUND_UP(div, 1 << calcp);
} else {
- calcp = __roundup_pow_of_two(div);
+ calcp = roundup_pow_of_two(div);
calcp = calcp > 3 ? 3 : calcp;
}
diff --git a/drivers/infiniband/hw/hfi1/chip.c b/drivers/infiniband/hw/hfi1/chip.c
index 9b1fb84a3d45..96b1d343c32f 100644
--- a/drivers/infiniband/hw/hfi1/chip.c
+++ b/drivers/infiniband/hw/hfi1/chip.c
@@ -14199,10 +14199,10 @@ static int qos_rmt_entries(struct hfi1_devdata *dd, unsigned int *mp,
max_by_vl = krcvqs[i];
if (max_by_vl > 32)
goto no_qos;
- m = ilog2(__roundup_pow_of_two(max_by_vl));
+ m = ilog2(roundup_pow_of_two(max_by_vl));
/* determine bits for vl */
- n = ilog2(__roundup_pow_of_two(num_vls));
+ n = ilog2(roundup_pow_of_two(num_vls));
/* reject if too much is used */
if ((m + n) > 7)
diff --git a/drivers/infiniband/hw/hfi1/init.c b/drivers/infiniband/hw/hfi1/init.c
index 26b792bb1027..838c789c7cce 100644
--- a/drivers/infiniband/hw/hfi1/init.c
+++ b/drivers/infiniband/hw/hfi1/init.c
@@ -467,7 +467,7 @@ int hfi1_create_ctxtdata(struct hfi1_pportdata *ppd, int numa,
* MTU supported.
*/
if (rcd->egrbufs.size < hfi1_max_mtu) {
- rcd->egrbufs.size = __roundup_pow_of_two(hfi1_max_mtu);
+ rcd->egrbufs.size = roundup_pow_of_two(hfi1_max_mtu);
hfi1_cdbg(PROC,
"ctxt%u: eager bufs size too small. Adjusting to %u\n",
rcd->ctxt, rcd->egrbufs.size);
@@ -1959,7 +1959,7 @@ int hfi1_setup_eagerbufs(struct hfi1_ctxtdata *rcd)
* to satisfy the "multiple of 8 RcvArray entries" requirement.
*/
if (rcd->egrbufs.size <= (1 << 20))
- rcd->egrbufs.rcvtid_size = max((unsigned long)round_mtu,
+ rcd->egrbufs.rcvtid_size = max((unsigned long long)round_mtu,
rounddown_pow_of_two(rcd->egrbufs.size / 8));
while (alloced_bytes < rcd->egrbufs.size &&
diff --git a/drivers/infiniband/hw/mlx4/srq.c b/drivers/infiniband/hw/mlx4/srq.c
index 8dcf6e3d9ae2..7e685600a7b3 100644
--- a/drivers/infiniband/hw/mlx4/srq.c
+++ b/drivers/infiniband/hw/mlx4/srq.c
@@ -96,7 +96,7 @@ int mlx4_ib_create_srq(struct ib_srq *ib_srq,
srq->msrq.max = roundup_pow_of_two(init_attr->attr.max_wr + 1);
srq->msrq.max_gs = init_attr->attr.max_sge;
- desc_size = max(32UL,
+ desc_size = max(32ULL,
roundup_pow_of_two(sizeof (struct mlx4_wqe_srq_next_seg) +
srq->msrq.max_gs *
sizeof (struct mlx4_wqe_data_seg)));
diff --git a/drivers/infiniband/hw/mthca/mthca_srq.c b/drivers/infiniband/hw/mthca/mthca_srq.c
index a85935ccce88..0c2e14b4142a 100644
--- a/drivers/infiniband/hw/mthca/mthca_srq.c
+++ b/drivers/infiniband/hw/mthca/mthca_srq.c
@@ -225,7 +225,7 @@ int mthca_alloc_srq(struct mthca_dev *dev, struct mthca_pd *pd,
else
srq->max = srq->max + 1;
- ds = max(64UL,
+ ds = max(64ULL,
roundup_pow_of_two(sizeof (struct mthca_next_seg) +
srq->max_gs * sizeof (struct mthca_data_seg)));
diff --git a/drivers/infiniband/sw/rxe/rxe_qp.c b/drivers/infiniband/sw/rxe/rxe_qp.c
index e2c6d1cedf41..040b707b0877 100644
--- a/drivers/infiniband/sw/rxe/rxe_qp.c
+++ b/drivers/infiniband/sw/rxe/rxe_qp.c
@@ -592,7 +592,7 @@ int rxe_qp_from_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask,
int err;
if (mask & IB_QP_MAX_QP_RD_ATOMIC) {
- int max_rd_atomic = __roundup_pow_of_two(attr->max_rd_atomic);
+ int max_rd_atomic = roundup_pow_of_two(attr->max_rd_atomic);
qp->attr.max_rd_atomic = max_rd_atomic;
atomic_set(&qp->req.rd_atomic, max_rd_atomic);
@@ -600,7 +600,7 @@ int rxe_qp_from_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask,
if (mask & IB_QP_MAX_DEST_RD_ATOMIC) {
int max_dest_rd_atomic =
- __roundup_pow_of_two(attr->max_dest_rd_atomic);
+ roundup_pow_of_two(attr->max_dest_rd_atomic);
qp->attr.max_dest_rd_atomic = max_dest_rd_atomic;
diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
index 0c8d81f56a30..ce7c900bd666 100644
--- a/drivers/iommu/intel-iommu.c
+++ b/drivers/iommu/intel-iommu.c
@@ -1488,7 +1488,7 @@ static void iommu_flush_iotlb_psi(struct intel_iommu *iommu,
unsigned long pfn, unsigned int pages,
int ih, int map)
{
- unsigned int mask = ilog2(__roundup_pow_of_two(pages));
+ unsigned int mask = ilog2(roundup_pow_of_two(pages));
uint64_t addr = (uint64_t)pfn << VTD_PAGE_SHIFT;
u16 did = domain->iommu_did[iommu->seq_id];
@@ -3390,7 +3390,7 @@ static unsigned long intel_alloc_iova(struct device *dev,
/* Restrict dma_mask to the width that the iommu can handle */
dma_mask = min_t(uint64_t, DOMAIN_MAX_ADDR(domain->gaw), dma_mask);
/* Ensure we reserve the whole size-aligned region */
- nrpages = __roundup_pow_of_two(nrpages);
+ nrpages = roundup_pow_of_two(nrpages);
if (!dmar_forcedac && dma_mask > DMA_BIT_MASK(32)) {
/*
diff --git a/drivers/iommu/intel-svm.c b/drivers/iommu/intel-svm.c
index 9b159132405d..602caca3cd1a 100644
--- a/drivers/iommu/intel-svm.c
+++ b/drivers/iommu/intel-svm.c
@@ -115,7 +115,7 @@ static void intel_flush_svm_range_dev (struct intel_svm *svm, struct intel_svm_d
QI_EIOTLB_TYPE;
desc.qw1 = 0;
} else {
- int mask = ilog2(__roundup_pow_of_two(pages));
+ int mask = ilog2(roundup_pow_of_two(pages));
desc.qw0 = QI_EIOTLB_PASID(svm->pasid) |
QI_EIOTLB_DID(sdev->did) |
@@ -142,7 +142,7 @@ static void intel_flush_svm_range_dev (struct intel_svm *svm, struct intel_svm_d
* for example, an "address" value of 0x12345f000 will
* flush from 0x123440000 to 0x12347ffff (256KiB). */
unsigned long last = address + ((unsigned long)(pages - 1) << VTD_PAGE_SHIFT);
- unsigned long mask = __rounddown_pow_of_two(address ^ last);
+ unsigned long mask = rounddown_pow_of_two(address ^ last);
desc.qw1 = QI_DEV_EIOTLB_ADDR((address & ~mask) |
(mask - 1)) | QI_DEV_EIOTLB_SIZE;
diff --git a/drivers/iommu/intel_irq_remapping.c b/drivers/iommu/intel_irq_remapping.c
index 81e43c1df7ec..935657b2c661 100644
--- a/drivers/iommu/intel_irq_remapping.c
+++ b/drivers/iommu/intel_irq_remapping.c
@@ -113,7 +113,7 @@ static int alloc_irte(struct intel_iommu *iommu,
return -1;
if (count > 1) {
- count = __roundup_pow_of_two(count);
+ count = roundup_pow_of_two(count);
mask = ilog2(count);
}
diff --git a/drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c b/drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c
index 6a757dadb5f1..fd5b12c23eaa 100644
--- a/drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c
+++ b/drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c
@@ -680,13 +680,13 @@ static int xgbe_set_ringparam(struct net_device *netdev,
return -EINVAL;
}
- rx = __rounddown_pow_of_two(ringparam->rx_pending);
+ rx = rounddown_pow_of_two(ringparam->rx_pending);
if (rx != ringparam->rx_pending)
netdev_notice(netdev,
"rx ring parameter rounded to power of two: %u\n",
rx);
- tx = __rounddown_pow_of_two(ringparam->tx_pending);
+ tx = rounddown_pow_of_two(ringparam->tx_pending);
if (tx != ringparam->tx_pending)
netdev_notice(netdev,
"tx ring parameter rounded to power of two: %u\n",
diff --git a/drivers/net/ethernet/marvell/sky2.c b/drivers/net/ethernet/marvell/sky2.c
index 5f56ee83e3b1..cc3a03b4a611 100644
--- a/drivers/net/ethernet/marvell/sky2.c
+++ b/drivers/net/ethernet/marvell/sky2.c
@@ -4139,7 +4139,7 @@ static int sky2_set_coalesce(struct net_device *dev,
*/
static unsigned long roundup_ring_size(unsigned long pending)
{
- return max(128ul, roundup_pow_of_two(pending+1));
+ return max(128ull, roundup_pow_of_two(pending+1));
}
static void sky2_get_ringparam(struct net_device *dev,
diff --git a/drivers/net/ethernet/rocker/rocker_hw.h b/drivers/net/ethernet/rocker/rocker_hw.h
index 59f1f8b690d2..d8de15509e2c 100644
--- a/drivers/net/ethernet/rocker/rocker_hw.h
+++ b/drivers/net/ethernet/rocker/rocker_hw.h
@@ -88,8 +88,8 @@ enum rocker_dma_type {
};
/* Rocker DMA ring size limits and default sizes */
-#define ROCKER_DMA_SIZE_MIN 2ul
-#define ROCKER_DMA_SIZE_MAX 65536ul
+#define ROCKER_DMA_SIZE_MIN 2ull
+#define ROCKER_DMA_SIZE_MAX 65536ull
#define ROCKER_DMA_CMD_DEFAULT_SIZE 32ul
#define ROCKER_DMA_EVENT_DEFAULT_SIZE 32ul
#define ROCKER_DMA_TX_DEFAULT_SIZE 64ul
diff --git a/drivers/net/ethernet/sfc/ef10.c b/drivers/net/ethernet/sfc/ef10.c
index 4d9bbccc6f89..4f4d9a5b3b75 100644
--- a/drivers/net/ethernet/sfc/ef10.c
+++ b/drivers/net/ethernet/sfc/ef10.c
@@ -27,7 +27,7 @@ enum {
};
/* The maximum size of a shared RSS context */
/* TODO: this should really be from the mcdi protocol export */
-#define EFX_EF10_MAX_SHARED_RSS_CONTEXT_SIZE 64UL
+#define EFX_EF10_MAX_SHARED_RSS_CONTEXT_SIZE 64ULL
/* The filter table(s) are managed by firmware and we have write-only
* access. When removing filters we must identify them to the
diff --git a/drivers/net/ethernet/sfc/efx.h b/drivers/net/ethernet/sfc/efx.h
index 2dd8d5002315..fea2add5860e 100644
--- a/drivers/net/ethernet/sfc/efx.h
+++ b/drivers/net/ethernet/sfc/efx.h
@@ -52,7 +52,7 @@ void efx_schedule_slow_fill(struct efx_rx_queue *rx_queue);
#define EFX_MAX_DMAQ_SIZE 4096UL
#define EFX_DEFAULT_DMAQ_SIZE 1024UL
-#define EFX_MIN_DMAQ_SIZE 512UL
+#define EFX_MIN_DMAQ_SIZE 512ULL
#define EFX_MAX_EVQ_SIZE 16384UL
#define EFX_MIN_EVQ_SIZE 512UL
diff --git a/drivers/net/ethernet/sfc/falcon/efx.h b/drivers/net/ethernet/sfc/falcon/efx.h
index d3b4646545fa..0d16257156d6 100644
--- a/drivers/net/ethernet/sfc/falcon/efx.h
+++ b/drivers/net/ethernet/sfc/falcon/efx.h
@@ -55,7 +55,7 @@ void ef4_schedule_slow_fill(struct ef4_rx_queue *rx_queue);
#define EF4_MAX_DMAQ_SIZE 4096UL
#define EF4_DEFAULT_DMAQ_SIZE 1024UL
-#define EF4_MIN_DMAQ_SIZE 512UL
+#define EF4_MIN_DMAQ_SIZE 512ULL
#define EF4_MAX_EVQ_SIZE 16384UL
#define EF4_MIN_EVQ_SIZE 512UL
diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c
index c7709e49f0e4..f0391e88bc42 100644
--- a/drivers/pci/msi.c
+++ b/drivers/pci/msi.c
@@ -578,7 +578,7 @@ msi_setup_entry(struct pci_dev *dev, int nvec, struct irq_affinity *affd)
entry->msi_attrib.maskbit = !!(control & PCI_MSI_FLAGS_MASKBIT);
entry->msi_attrib.default_irq = dev->irq; /* Save IOAPIC IRQ */
entry->msi_attrib.multi_cap = (control & PCI_MSI_FLAGS_QMASK) >> 1;
- entry->msi_attrib.multiple = ilog2(__roundup_pow_of_two(nvec));
+ entry->msi_attrib.multiple = ilog2(roundup_pow_of_two(nvec));
if (control & PCI_MSI_FLAGS_64BIT)
entry->mask_pos = dev->msi_cap + PCI_MSI_MASK_64;
diff --git a/include/linux/log2.h b/include/linux/log2.h
index 83a4a3ca3e8a..53a727303dac 100644
--- a/include/linux/log2.h
+++ b/include/linux/log2.h
@@ -47,26 +47,6 @@ bool is_power_of_2(unsigned long n)
return (n != 0 && ((n & (n - 1)) == 0));
}
-/**
- * __roundup_pow_of_two() - round up to nearest power of two
- * @n: value to round up
- */
-static inline __attribute__((const))
-unsigned long __roundup_pow_of_two(unsigned long n)
-{
- return 1UL << fls_long(n - 1);
-}
-
-/**
- * __rounddown_pow_of_two() - round down to nearest power of two
- * @n: value to round down
- */
-static inline __attribute__((const))
-unsigned long __rounddown_pow_of_two(unsigned long n)
-{
- return 1UL << (fls_long(n) - 1);
-}
-
/**
* const_ilog2 - log base 2 of 32-bit or a 64-bit constant unsigned value
* @n: parameter
@@ -170,14 +150,11 @@ unsigned long __rounddown_pow_of_two(unsigned long n)
* - the result is undefined when n == 0
* - this can be used to initialise global variables from constant data
*/
-#define roundup_pow_of_two(n) \
-( \
- __builtin_constant_p(n) ? ( \
- (n == 1) ? 1 : \
- (1UL << (ilog2((n) - 1) + 1)) \
- ) : \
- __roundup_pow_of_two(n) \
- )
+#define roundup_pow_of_two(n) \
+( \
+ (__builtin_constant_p(n) && ((n) == 1)) ? \
+ 1 : (1ULL << (ilog2((n) - 1) + 1)) \
+)
/**
* rounddown_pow_of_two - round the given value down to nearest power of two
@@ -187,12 +164,11 @@ unsigned long __rounddown_pow_of_two(unsigned long n)
* - the result is undefined when n == 0
* - this can be used to initialise global variables from constant data
*/
-#define rounddown_pow_of_two(n) \
-( \
- __builtin_constant_p(n) ? ( \
- (1UL << ilog2(n))) : \
- __rounddown_pow_of_two(n) \
- )
+#define rounddown_pow_of_two(n) \
+( \
+ (__builtin_constant_p(n) && ((n) == 1)) ? \
+ 1 : (1ULL << (ilog2(n))) \
+)
static inline __attribute_const__
int __order_base_2(unsigned long n)
diff --git a/kernel/kexec_core.c b/kernel/kexec_core.c
index 15d70a90b50d..bb9efc6944a4 100644
--- a/kernel/kexec_core.c
+++ b/kernel/kexec_core.c
@@ -1094,7 +1094,8 @@ static int __init crash_notes_memory_init(void)
* crash_notes is allocated inside one physical page.
*/
size = sizeof(note_buf_t);
- align = min(roundup_pow_of_two(sizeof(note_buf_t)), PAGE_SIZE);
+ align = min(roundup_pow_of_two(sizeof(note_buf_t)),
+ (unsigned long long)PAGE_SIZE);
/*
* Break compile if size is bigger than PAGE_SIZE since crash_notes
diff --git a/lib/rhashtable.c b/lib/rhashtable.c
index bdb7e4cadf05..70908678c7a8 100644
--- a/lib/rhashtable.c
+++ b/lib/rhashtable.c
@@ -950,7 +950,7 @@ static size_t rounded_hashtable_size(const struct rhashtable_params *params)
if (params->nelem_hint)
retsize = max(roundup_pow_of_two(params->nelem_hint * 4 / 3),
- (unsigned long)params->min_size);
+ (unsigned long long)params->min_size);
else
retsize = max(HASH_DEFAULT_SIZE,
(unsigned long)params->min_size);
diff --git a/net/sunrpc/xprtrdma/verbs.c b/net/sunrpc/xprtrdma/verbs.c
index 77c7dd7f05e8..78fb8ccabddd 100644
--- a/net/sunrpc/xprtrdma/verbs.c
+++ b/net/sunrpc/xprtrdma/verbs.c
@@ -1015,7 +1015,7 @@ struct rpcrdma_req *rpcrdma_req_create(struct rpcrdma_xprt *r_xprt, size_t size,
maxhdrsize = rpcrdma_fixed_maxsz + 3 +
r_xprt->rx_ia.ri_max_segs * rpcrdma_readchunk_maxsz;
maxhdrsize *= sizeof(__be32);
- rb = rpcrdma_regbuf_alloc(__roundup_pow_of_two(maxhdrsize),
+ rb = rpcrdma_regbuf_alloc(roundup_pow_of_two(maxhdrsize),
DMA_TO_DEVICE, flags);
if (!rb)
goto out2;
--
2.24.0
^ permalink raw reply related [flat|nested] 71+ messages in thread
* [PATCH v4 7/8] linux/log2.h: Fix 64bit calculations in roundup/down_pow_two()
@ 2019-12-03 11:47 ` Nicolas Saenz Julienne
0 siblings, 0 replies; 71+ messages in thread
From: Nicolas Saenz Julienne @ 2019-12-03 11:47 UTC (permalink / raw)
To: andrew.murray, maz, linux-kernel, Michael Turquette,
Stephen Boyd, Emilio López, Maxime Ripard, Chen-Yu Tsai,
Mike Marciniszyn, Dennis Dalessandro, Yishai Hadas, Moni Shoua,
David Woodhouse, Lu Baolu, Joerg Roedel, Tom Lendacky,
Mirko Lindner, Stephen Hemminger, Jiri Pirko,
Solarflare linux maintainers, Edward Cree, Martin Habets,
Bjorn Helgaas, Eric Biederman, Thomas Graf, Herbert Xu
Cc: linux-pci, J. Bruce Fields, linux-clk, f.fainelli, linux-rdma,
phil, Jason Gunthorpe, Doug Ledford, linux-rpi-kernel,
Trond Myklebust, linux-arm-kernel, linux-nfs, mbrugger, netdev,
kexec, jeremy.linton, David S. Miller, iommu, Chuck Lever,
wahrenst, james.quinlan, Anna Schumaker, Nicolas Saenz Julienne,
Robin Murphy
Some users need to make sure their rounding function accepts and returns
64bit long variables regardless of the architecture. Sadly
roundup/rounddown_pow_two() takes and returns unsigned longs. It turns
out ilog2() already handles 32/64bit calculations properly, and being
the building block to the round functions we can rework them as a
wrapper around it.
Suggested-by: Robin Murphy <robin.murphy@arm.con>
Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
---
drivers/clk/clk-divider.c | 8 ++--
drivers/clk/sunxi/clk-sunxi.c | 2 +-
drivers/infiniband/hw/hfi1/chip.c | 4 +-
drivers/infiniband/hw/hfi1/init.c | 4 +-
drivers/infiniband/hw/mlx4/srq.c | 2 +-
drivers/infiniband/hw/mthca/mthca_srq.c | 2 +-
drivers/infiniband/sw/rxe/rxe_qp.c | 4 +-
drivers/iommu/intel-iommu.c | 4 +-
drivers/iommu/intel-svm.c | 4 +-
drivers/iommu/intel_irq_remapping.c | 2 +-
drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c | 4 +-
drivers/net/ethernet/marvell/sky2.c | 2 +-
drivers/net/ethernet/rocker/rocker_hw.h | 4 +-
drivers/net/ethernet/sfc/ef10.c | 2 +-
drivers/net/ethernet/sfc/efx.h | 2 +-
drivers/net/ethernet/sfc/falcon/efx.h | 2 +-
drivers/pci/msi.c | 2 +-
include/linux/log2.h | 44 +++++---------------
kernel/kexec_core.c | 3 +-
lib/rhashtable.c | 2 +-
net/sunrpc/xprtrdma/verbs.c | 2 +-
21 files changed, 41 insertions(+), 64 deletions(-)
diff --git a/drivers/clk/clk-divider.c b/drivers/clk/clk-divider.c
index 098b2b01f0af..ba947e4c8193 100644
--- a/drivers/clk/clk-divider.c
+++ b/drivers/clk/clk-divider.c
@@ -222,7 +222,7 @@ static int _div_round_up(const struct clk_div_table *table,
int div = DIV_ROUND_UP_ULL((u64)parent_rate, rate);
if (flags & CLK_DIVIDER_POWER_OF_TWO)
- div = __roundup_pow_of_two(div);
+ div = roundup_pow_of_two(div);
if (table)
div = _round_up_table(table, div);
@@ -240,8 +240,8 @@ static int _div_round_closest(const struct clk_div_table *table,
down = parent_rate / rate;
if (flags & CLK_DIVIDER_POWER_OF_TWO) {
- up = __roundup_pow_of_two(up);
- down = __rounddown_pow_of_two(down);
+ up = roundup_pow_of_two(up);
+ down = rounddown_pow_of_two(down);
} else if (table) {
up = _round_up_table(table, up);
down = _round_down_table(table, down);
@@ -278,7 +278,7 @@ static int _next_div(const struct clk_div_table *table, int div,
div++;
if (flags & CLK_DIVIDER_POWER_OF_TWO)
- return __roundup_pow_of_two(div);
+ return roundup_pow_of_two(div);
if (table)
return _round_up_table(table, div);
diff --git a/drivers/clk/sunxi/clk-sunxi.c b/drivers/clk/sunxi/clk-sunxi.c
index 27201fd26e44..faec99dc09c0 100644
--- a/drivers/clk/sunxi/clk-sunxi.c
+++ b/drivers/clk/sunxi/clk-sunxi.c
@@ -311,7 +311,7 @@ static void sun6i_get_ahb1_factors(struct factors_request *req)
calcm = DIV_ROUND_UP(div, 1 << calcp);
} else {
- calcp = __roundup_pow_of_two(div);
+ calcp = roundup_pow_of_two(div);
calcp = calcp > 3 ? 3 : calcp;
}
diff --git a/drivers/infiniband/hw/hfi1/chip.c b/drivers/infiniband/hw/hfi1/chip.c
index 9b1fb84a3d45..96b1d343c32f 100644
--- a/drivers/infiniband/hw/hfi1/chip.c
+++ b/drivers/infiniband/hw/hfi1/chip.c
@@ -14199,10 +14199,10 @@ static int qos_rmt_entries(struct hfi1_devdata *dd, unsigned int *mp,
max_by_vl = krcvqs[i];
if (max_by_vl > 32)
goto no_qos;
- m = ilog2(__roundup_pow_of_two(max_by_vl));
+ m = ilog2(roundup_pow_of_two(max_by_vl));
/* determine bits for vl */
- n = ilog2(__roundup_pow_of_two(num_vls));
+ n = ilog2(roundup_pow_of_two(num_vls));
/* reject if too much is used */
if ((m + n) > 7)
diff --git a/drivers/infiniband/hw/hfi1/init.c b/drivers/infiniband/hw/hfi1/init.c
index 26b792bb1027..838c789c7cce 100644
--- a/drivers/infiniband/hw/hfi1/init.c
+++ b/drivers/infiniband/hw/hfi1/init.c
@@ -467,7 +467,7 @@ int hfi1_create_ctxtdata(struct hfi1_pportdata *ppd, int numa,
* MTU supported.
*/
if (rcd->egrbufs.size < hfi1_max_mtu) {
- rcd->egrbufs.size = __roundup_pow_of_two(hfi1_max_mtu);
+ rcd->egrbufs.size = roundup_pow_of_two(hfi1_max_mtu);
hfi1_cdbg(PROC,
"ctxt%u: eager bufs size too small. Adjusting to %u\n",
rcd->ctxt, rcd->egrbufs.size);
@@ -1959,7 +1959,7 @@ int hfi1_setup_eagerbufs(struct hfi1_ctxtdata *rcd)
* to satisfy the "multiple of 8 RcvArray entries" requirement.
*/
if (rcd->egrbufs.size <= (1 << 20))
- rcd->egrbufs.rcvtid_size = max((unsigned long)round_mtu,
+ rcd->egrbufs.rcvtid_size = max((unsigned long long)round_mtu,
rounddown_pow_of_two(rcd->egrbufs.size / 8));
while (alloced_bytes < rcd->egrbufs.size &&
diff --git a/drivers/infiniband/hw/mlx4/srq.c b/drivers/infiniband/hw/mlx4/srq.c
index 8dcf6e3d9ae2..7e685600a7b3 100644
--- a/drivers/infiniband/hw/mlx4/srq.c
+++ b/drivers/infiniband/hw/mlx4/srq.c
@@ -96,7 +96,7 @@ int mlx4_ib_create_srq(struct ib_srq *ib_srq,
srq->msrq.max = roundup_pow_of_two(init_attr->attr.max_wr + 1);
srq->msrq.max_gs = init_attr->attr.max_sge;
- desc_size = max(32UL,
+ desc_size = max(32ULL,
roundup_pow_of_two(sizeof (struct mlx4_wqe_srq_next_seg) +
srq->msrq.max_gs *
sizeof (struct mlx4_wqe_data_seg)));
diff --git a/drivers/infiniband/hw/mthca/mthca_srq.c b/drivers/infiniband/hw/mthca/mthca_srq.c
index a85935ccce88..0c2e14b4142a 100644
--- a/drivers/infiniband/hw/mthca/mthca_srq.c
+++ b/drivers/infiniband/hw/mthca/mthca_srq.c
@@ -225,7 +225,7 @@ int mthca_alloc_srq(struct mthca_dev *dev, struct mthca_pd *pd,
else
srq->max = srq->max + 1;
- ds = max(64UL,
+ ds = max(64ULL,
roundup_pow_of_two(sizeof (struct mthca_next_seg) +
srq->max_gs * sizeof (struct mthca_data_seg)));
diff --git a/drivers/infiniband/sw/rxe/rxe_qp.c b/drivers/infiniband/sw/rxe/rxe_qp.c
index e2c6d1cedf41..040b707b0877 100644
--- a/drivers/infiniband/sw/rxe/rxe_qp.c
+++ b/drivers/infiniband/sw/rxe/rxe_qp.c
@@ -592,7 +592,7 @@ int rxe_qp_from_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask,
int err;
if (mask & IB_QP_MAX_QP_RD_ATOMIC) {
- int max_rd_atomic = __roundup_pow_of_two(attr->max_rd_atomic);
+ int max_rd_atomic = roundup_pow_of_two(attr->max_rd_atomic);
qp->attr.max_rd_atomic = max_rd_atomic;
atomic_set(&qp->req.rd_atomic, max_rd_atomic);
@@ -600,7 +600,7 @@ int rxe_qp_from_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask,
if (mask & IB_QP_MAX_DEST_RD_ATOMIC) {
int max_dest_rd_atomic =
- __roundup_pow_of_two(attr->max_dest_rd_atomic);
+ roundup_pow_of_two(attr->max_dest_rd_atomic);
qp->attr.max_dest_rd_atomic = max_dest_rd_atomic;
diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
index 0c8d81f56a30..ce7c900bd666 100644
--- a/drivers/iommu/intel-iommu.c
+++ b/drivers/iommu/intel-iommu.c
@@ -1488,7 +1488,7 @@ static void iommu_flush_iotlb_psi(struct intel_iommu *iommu,
unsigned long pfn, unsigned int pages,
int ih, int map)
{
- unsigned int mask = ilog2(__roundup_pow_of_two(pages));
+ unsigned int mask = ilog2(roundup_pow_of_two(pages));
uint64_t addr = (uint64_t)pfn << VTD_PAGE_SHIFT;
u16 did = domain->iommu_did[iommu->seq_id];
@@ -3390,7 +3390,7 @@ static unsigned long intel_alloc_iova(struct device *dev,
/* Restrict dma_mask to the width that the iommu can handle */
dma_mask = min_t(uint64_t, DOMAIN_MAX_ADDR(domain->gaw), dma_mask);
/* Ensure we reserve the whole size-aligned region */
- nrpages = __roundup_pow_of_two(nrpages);
+ nrpages = roundup_pow_of_two(nrpages);
if (!dmar_forcedac && dma_mask > DMA_BIT_MASK(32)) {
/*
diff --git a/drivers/iommu/intel-svm.c b/drivers/iommu/intel-svm.c
index 9b159132405d..602caca3cd1a 100644
--- a/drivers/iommu/intel-svm.c
+++ b/drivers/iommu/intel-svm.c
@@ -115,7 +115,7 @@ static void intel_flush_svm_range_dev (struct intel_svm *svm, struct intel_svm_d
QI_EIOTLB_TYPE;
desc.qw1 = 0;
} else {
- int mask = ilog2(__roundup_pow_of_two(pages));
+ int mask = ilog2(roundup_pow_of_two(pages));
desc.qw0 = QI_EIOTLB_PASID(svm->pasid) |
QI_EIOTLB_DID(sdev->did) |
@@ -142,7 +142,7 @@ static void intel_flush_svm_range_dev (struct intel_svm *svm, struct intel_svm_d
* for example, an "address" value of 0x12345f000 will
* flush from 0x123440000 to 0x12347ffff (256KiB). */
unsigned long last = address + ((unsigned long)(pages - 1) << VTD_PAGE_SHIFT);
- unsigned long mask = __rounddown_pow_of_two(address ^ last);
+ unsigned long mask = rounddown_pow_of_two(address ^ last);
desc.qw1 = QI_DEV_EIOTLB_ADDR((address & ~mask) |
(mask - 1)) | QI_DEV_EIOTLB_SIZE;
diff --git a/drivers/iommu/intel_irq_remapping.c b/drivers/iommu/intel_irq_remapping.c
index 81e43c1df7ec..935657b2c661 100644
--- a/drivers/iommu/intel_irq_remapping.c
+++ b/drivers/iommu/intel_irq_remapping.c
@@ -113,7 +113,7 @@ static int alloc_irte(struct intel_iommu *iommu,
return -1;
if (count > 1) {
- count = __roundup_pow_of_two(count);
+ count = roundup_pow_of_two(count);
mask = ilog2(count);
}
diff --git a/drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c b/drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c
index 6a757dadb5f1..fd5b12c23eaa 100644
--- a/drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c
+++ b/drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c
@@ -680,13 +680,13 @@ static int xgbe_set_ringparam(struct net_device *netdev,
return -EINVAL;
}
- rx = __rounddown_pow_of_two(ringparam->rx_pending);
+ rx = rounddown_pow_of_two(ringparam->rx_pending);
if (rx != ringparam->rx_pending)
netdev_notice(netdev,
"rx ring parameter rounded to power of two: %u\n",
rx);
- tx = __rounddown_pow_of_two(ringparam->tx_pending);
+ tx = rounddown_pow_of_two(ringparam->tx_pending);
if (tx != ringparam->tx_pending)
netdev_notice(netdev,
"tx ring parameter rounded to power of two: %u\n",
diff --git a/drivers/net/ethernet/marvell/sky2.c b/drivers/net/ethernet/marvell/sky2.c
index 5f56ee83e3b1..cc3a03b4a611 100644
--- a/drivers/net/ethernet/marvell/sky2.c
+++ b/drivers/net/ethernet/marvell/sky2.c
@@ -4139,7 +4139,7 @@ static int sky2_set_coalesce(struct net_device *dev,
*/
static unsigned long roundup_ring_size(unsigned long pending)
{
- return max(128ul, roundup_pow_of_two(pending+1));
+ return max(128ull, roundup_pow_of_two(pending+1));
}
static void sky2_get_ringparam(struct net_device *dev,
diff --git a/drivers/net/ethernet/rocker/rocker_hw.h b/drivers/net/ethernet/rocker/rocker_hw.h
index 59f1f8b690d2..d8de15509e2c 100644
--- a/drivers/net/ethernet/rocker/rocker_hw.h
+++ b/drivers/net/ethernet/rocker/rocker_hw.h
@@ -88,8 +88,8 @@ enum rocker_dma_type {
};
/* Rocker DMA ring size limits and default sizes */
-#define ROCKER_DMA_SIZE_MIN 2ul
-#define ROCKER_DMA_SIZE_MAX 65536ul
+#define ROCKER_DMA_SIZE_MIN 2ull
+#define ROCKER_DMA_SIZE_MAX 65536ull
#define ROCKER_DMA_CMD_DEFAULT_SIZE 32ul
#define ROCKER_DMA_EVENT_DEFAULT_SIZE 32ul
#define ROCKER_DMA_TX_DEFAULT_SIZE 64ul
diff --git a/drivers/net/ethernet/sfc/ef10.c b/drivers/net/ethernet/sfc/ef10.c
index 4d9bbccc6f89..4f4d9a5b3b75 100644
--- a/drivers/net/ethernet/sfc/ef10.c
+++ b/drivers/net/ethernet/sfc/ef10.c
@@ -27,7 +27,7 @@ enum {
};
/* The maximum size of a shared RSS context */
/* TODO: this should really be from the mcdi protocol export */
-#define EFX_EF10_MAX_SHARED_RSS_CONTEXT_SIZE 64UL
+#define EFX_EF10_MAX_SHARED_RSS_CONTEXT_SIZE 64ULL
/* The filter table(s) are managed by firmware and we have write-only
* access. When removing filters we must identify them to the
diff --git a/drivers/net/ethernet/sfc/efx.h b/drivers/net/ethernet/sfc/efx.h
index 2dd8d5002315..fea2add5860e 100644
--- a/drivers/net/ethernet/sfc/efx.h
+++ b/drivers/net/ethernet/sfc/efx.h
@@ -52,7 +52,7 @@ void efx_schedule_slow_fill(struct efx_rx_queue *rx_queue);
#define EFX_MAX_DMAQ_SIZE 4096UL
#define EFX_DEFAULT_DMAQ_SIZE 1024UL
-#define EFX_MIN_DMAQ_SIZE 512UL
+#define EFX_MIN_DMAQ_SIZE 512ULL
#define EFX_MAX_EVQ_SIZE 16384UL
#define EFX_MIN_EVQ_SIZE 512UL
diff --git a/drivers/net/ethernet/sfc/falcon/efx.h b/drivers/net/ethernet/sfc/falcon/efx.h
index d3b4646545fa..0d16257156d6 100644
--- a/drivers/net/ethernet/sfc/falcon/efx.h
+++ b/drivers/net/ethernet/sfc/falcon/efx.h
@@ -55,7 +55,7 @@ void ef4_schedule_slow_fill(struct ef4_rx_queue *rx_queue);
#define EF4_MAX_DMAQ_SIZE 4096UL
#define EF4_DEFAULT_DMAQ_SIZE 1024UL
-#define EF4_MIN_DMAQ_SIZE 512UL
+#define EF4_MIN_DMAQ_SIZE 512ULL
#define EF4_MAX_EVQ_SIZE 16384UL
#define EF4_MIN_EVQ_SIZE 512UL
diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c
index c7709e49f0e4..f0391e88bc42 100644
--- a/drivers/pci/msi.c
+++ b/drivers/pci/msi.c
@@ -578,7 +578,7 @@ msi_setup_entry(struct pci_dev *dev, int nvec, struct irq_affinity *affd)
entry->msi_attrib.maskbit = !!(control & PCI_MSI_FLAGS_MASKBIT);
entry->msi_attrib.default_irq = dev->irq; /* Save IOAPIC IRQ */
entry->msi_attrib.multi_cap = (control & PCI_MSI_FLAGS_QMASK) >> 1;
- entry->msi_attrib.multiple = ilog2(__roundup_pow_of_two(nvec));
+ entry->msi_attrib.multiple = ilog2(roundup_pow_of_two(nvec));
if (control & PCI_MSI_FLAGS_64BIT)
entry->mask_pos = dev->msi_cap + PCI_MSI_MASK_64;
diff --git a/include/linux/log2.h b/include/linux/log2.h
index 83a4a3ca3e8a..53a727303dac 100644
--- a/include/linux/log2.h
+++ b/include/linux/log2.h
@@ -47,26 +47,6 @@ bool is_power_of_2(unsigned long n)
return (n != 0 && ((n & (n - 1)) == 0));
}
-/**
- * __roundup_pow_of_two() - round up to nearest power of two
- * @n: value to round up
- */
-static inline __attribute__((const))
-unsigned long __roundup_pow_of_two(unsigned long n)
-{
- return 1UL << fls_long(n - 1);
-}
-
-/**
- * __rounddown_pow_of_two() - round down to nearest power of two
- * @n: value to round down
- */
-static inline __attribute__((const))
-unsigned long __rounddown_pow_of_two(unsigned long n)
-{
- return 1UL << (fls_long(n) - 1);
-}
-
/**
* const_ilog2 - log base 2 of 32-bit or a 64-bit constant unsigned value
* @n: parameter
@@ -170,14 +150,11 @@ unsigned long __rounddown_pow_of_two(unsigned long n)
* - the result is undefined when n == 0
* - this can be used to initialise global variables from constant data
*/
-#define roundup_pow_of_two(n) \
-( \
- __builtin_constant_p(n) ? ( \
- (n == 1) ? 1 : \
- (1UL << (ilog2((n) - 1) + 1)) \
- ) : \
- __roundup_pow_of_two(n) \
- )
+#define roundup_pow_of_two(n) \
+( \
+ (__builtin_constant_p(n) && ((n) == 1)) ? \
+ 1 : (1ULL << (ilog2((n) - 1) + 1)) \
+)
/**
* rounddown_pow_of_two - round the given value down to nearest power of two
@@ -187,12 +164,11 @@ unsigned long __rounddown_pow_of_two(unsigned long n)
* - the result is undefined when n == 0
* - this can be used to initialise global variables from constant data
*/
-#define rounddown_pow_of_two(n) \
-( \
- __builtin_constant_p(n) ? ( \
- (1UL << ilog2(n))) : \
- __rounddown_pow_of_two(n) \
- )
+#define rounddown_pow_of_two(n) \
+( \
+ (__builtin_constant_p(n) && ((n) == 1)) ? \
+ 1 : (1ULL << (ilog2(n))) \
+)
static inline __attribute_const__
int __order_base_2(unsigned long n)
diff --git a/kernel/kexec_core.c b/kernel/kexec_core.c
index 15d70a90b50d..bb9efc6944a4 100644
--- a/kernel/kexec_core.c
+++ b/kernel/kexec_core.c
@@ -1094,7 +1094,8 @@ static int __init crash_notes_memory_init(void)
* crash_notes is allocated inside one physical page.
*/
size = sizeof(note_buf_t);
- align = min(roundup_pow_of_two(sizeof(note_buf_t)), PAGE_SIZE);
+ align = min(roundup_pow_of_two(sizeof(note_buf_t)),
+ (unsigned long long)PAGE_SIZE);
/*
* Break compile if size is bigger than PAGE_SIZE since crash_notes
diff --git a/lib/rhashtable.c b/lib/rhashtable.c
index bdb7e4cadf05..70908678c7a8 100644
--- a/lib/rhashtable.c
+++ b/lib/rhashtable.c
@@ -950,7 +950,7 @@ static size_t rounded_hashtable_size(const struct rhashtable_params *params)
if (params->nelem_hint)
retsize = max(roundup_pow_of_two(params->nelem_hint * 4 / 3),
- (unsigned long)params->min_size);
+ (unsigned long long)params->min_size);
else
retsize = max(HASH_DEFAULT_SIZE,
(unsigned long)params->min_size);
diff --git a/net/sunrpc/xprtrdma/verbs.c b/net/sunrpc/xprtrdma/verbs.c
index 77c7dd7f05e8..78fb8ccabddd 100644
--- a/net/sunrpc/xprtrdma/verbs.c
+++ b/net/sunrpc/xprtrdma/verbs.c
@@ -1015,7 +1015,7 @@ struct rpcrdma_req *rpcrdma_req_create(struct rpcrdma_xprt *r_xprt, size_t size,
maxhdrsize = rpcrdma_fixed_maxsz + 3 +
r_xprt->rx_ia.ri_max_segs * rpcrdma_readchunk_maxsz;
maxhdrsize *= sizeof(__be32);
- rb = rpcrdma_regbuf_alloc(__roundup_pow_of_two(maxhdrsize),
+ rb = rpcrdma_regbuf_alloc(roundup_pow_of_two(maxhdrsize),
DMA_TO_DEVICE, flags);
if (!rb)
goto out2;
--
2.24.0
_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu
^ permalink raw reply related [flat|nested] 71+ messages in thread
* [PATCH v4 7/8] linux/log2.h: Fix 64bit calculations in roundup/down_pow_two()
@ 2019-12-03 11:47 ` Nicolas Saenz Julienne
0 siblings, 0 replies; 71+ messages in thread
From: Nicolas Saenz Julienne @ 2019-12-03 11:47 UTC (permalink / raw)
To: andrew.murray, maz, linux-kernel, Michael Turquette,
Stephen Boyd, Emilio López, Maxime Ripard, Chen-Yu Tsai,
Mike Marciniszyn, Dennis Dalessandro, Yishai Hadas, Moni Shoua,
David Woodhouse, Lu Baolu, Joerg Roedel, Tom Lendacky,
Mirko Lindner, Stephen Hemminger, Jiri Pirko,
Solarflare linux maintainers, Edward Cree, Martin Habets,
Bjorn Helgaas, Eric Biederman, Thomas Graf, Herbert Xu
Cc: linux-pci, J. Bruce Fields, linux-clk, f.fainelli, linux-rdma,
phil, Jason Gunthorpe, Doug Ledford, linux-rpi-kernel,
Trond Myklebust, linux-arm-kernel, linux-nfs, mbrugger, netdev,
kexec, jeremy.linton, David S. Miller, iommu, Chuck Lever,
wahrenst, james.quinlan, Anna Schumaker, Nicolas Saenz Julienne,
Robin Murphy
Some users need to make sure their rounding function accepts and returns
64bit long variables regardless of the architecture. Sadly
roundup/rounddown_pow_two() takes and returns unsigned longs. It turns
out ilog2() already handles 32/64bit calculations properly, and being
the building block to the round functions we can rework them as a
wrapper around it.
Suggested-by: Robin Murphy <robin.murphy@arm.con>
Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
---
drivers/clk/clk-divider.c | 8 ++--
drivers/clk/sunxi/clk-sunxi.c | 2 +-
drivers/infiniband/hw/hfi1/chip.c | 4 +-
drivers/infiniband/hw/hfi1/init.c | 4 +-
drivers/infiniband/hw/mlx4/srq.c | 2 +-
drivers/infiniband/hw/mthca/mthca_srq.c | 2 +-
drivers/infiniband/sw/rxe/rxe_qp.c | 4 +-
drivers/iommu/intel-iommu.c | 4 +-
drivers/iommu/intel-svm.c | 4 +-
drivers/iommu/intel_irq_remapping.c | 2 +-
drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c | 4 +-
drivers/net/ethernet/marvell/sky2.c | 2 +-
drivers/net/ethernet/rocker/rocker_hw.h | 4 +-
drivers/net/ethernet/sfc/ef10.c | 2 +-
drivers/net/ethernet/sfc/efx.h | 2 +-
drivers/net/ethernet/sfc/falcon/efx.h | 2 +-
drivers/pci/msi.c | 2 +-
include/linux/log2.h | 44 +++++---------------
kernel/kexec_core.c | 3 +-
lib/rhashtable.c | 2 +-
net/sunrpc/xprtrdma/verbs.c | 2 +-
21 files changed, 41 insertions(+), 64 deletions(-)
diff --git a/drivers/clk/clk-divider.c b/drivers/clk/clk-divider.c
index 098b2b01f0af..ba947e4c8193 100644
--- a/drivers/clk/clk-divider.c
+++ b/drivers/clk/clk-divider.c
@@ -222,7 +222,7 @@ static int _div_round_up(const struct clk_div_table *table,
int div = DIV_ROUND_UP_ULL((u64)parent_rate, rate);
if (flags & CLK_DIVIDER_POWER_OF_TWO)
- div = __roundup_pow_of_two(div);
+ div = roundup_pow_of_two(div);
if (table)
div = _round_up_table(table, div);
@@ -240,8 +240,8 @@ static int _div_round_closest(const struct clk_div_table *table,
down = parent_rate / rate;
if (flags & CLK_DIVIDER_POWER_OF_TWO) {
- up = __roundup_pow_of_two(up);
- down = __rounddown_pow_of_two(down);
+ up = roundup_pow_of_two(up);
+ down = rounddown_pow_of_two(down);
} else if (table) {
up = _round_up_table(table, up);
down = _round_down_table(table, down);
@@ -278,7 +278,7 @@ static int _next_div(const struct clk_div_table *table, int div,
div++;
if (flags & CLK_DIVIDER_POWER_OF_TWO)
- return __roundup_pow_of_two(div);
+ return roundup_pow_of_two(div);
if (table)
return _round_up_table(table, div);
diff --git a/drivers/clk/sunxi/clk-sunxi.c b/drivers/clk/sunxi/clk-sunxi.c
index 27201fd26e44..faec99dc09c0 100644
--- a/drivers/clk/sunxi/clk-sunxi.c
+++ b/drivers/clk/sunxi/clk-sunxi.c
@@ -311,7 +311,7 @@ static void sun6i_get_ahb1_factors(struct factors_request *req)
calcm = DIV_ROUND_UP(div, 1 << calcp);
} else {
- calcp = __roundup_pow_of_two(div);
+ calcp = roundup_pow_of_two(div);
calcp = calcp > 3 ? 3 : calcp;
}
diff --git a/drivers/infiniband/hw/hfi1/chip.c b/drivers/infiniband/hw/hfi1/chip.c
index 9b1fb84a3d45..96b1d343c32f 100644
--- a/drivers/infiniband/hw/hfi1/chip.c
+++ b/drivers/infiniband/hw/hfi1/chip.c
@@ -14199,10 +14199,10 @@ static int qos_rmt_entries(struct hfi1_devdata *dd, unsigned int *mp,
max_by_vl = krcvqs[i];
if (max_by_vl > 32)
goto no_qos;
- m = ilog2(__roundup_pow_of_two(max_by_vl));
+ m = ilog2(roundup_pow_of_two(max_by_vl));
/* determine bits for vl */
- n = ilog2(__roundup_pow_of_two(num_vls));
+ n = ilog2(roundup_pow_of_two(num_vls));
/* reject if too much is used */
if ((m + n) > 7)
diff --git a/drivers/infiniband/hw/hfi1/init.c b/drivers/infiniband/hw/hfi1/init.c
index 26b792bb1027..838c789c7cce 100644
--- a/drivers/infiniband/hw/hfi1/init.c
+++ b/drivers/infiniband/hw/hfi1/init.c
@@ -467,7 +467,7 @@ int hfi1_create_ctxtdata(struct hfi1_pportdata *ppd, int numa,
* MTU supported.
*/
if (rcd->egrbufs.size < hfi1_max_mtu) {
- rcd->egrbufs.size = __roundup_pow_of_two(hfi1_max_mtu);
+ rcd->egrbufs.size = roundup_pow_of_two(hfi1_max_mtu);
hfi1_cdbg(PROC,
"ctxt%u: eager bufs size too small. Adjusting to %u\n",
rcd->ctxt, rcd->egrbufs.size);
@@ -1959,7 +1959,7 @@ int hfi1_setup_eagerbufs(struct hfi1_ctxtdata *rcd)
* to satisfy the "multiple of 8 RcvArray entries" requirement.
*/
if (rcd->egrbufs.size <= (1 << 20))
- rcd->egrbufs.rcvtid_size = max((unsigned long)round_mtu,
+ rcd->egrbufs.rcvtid_size = max((unsigned long long)round_mtu,
rounddown_pow_of_two(rcd->egrbufs.size / 8));
while (alloced_bytes < rcd->egrbufs.size &&
diff --git a/drivers/infiniband/hw/mlx4/srq.c b/drivers/infiniband/hw/mlx4/srq.c
index 8dcf6e3d9ae2..7e685600a7b3 100644
--- a/drivers/infiniband/hw/mlx4/srq.c
+++ b/drivers/infiniband/hw/mlx4/srq.c
@@ -96,7 +96,7 @@ int mlx4_ib_create_srq(struct ib_srq *ib_srq,
srq->msrq.max = roundup_pow_of_two(init_attr->attr.max_wr + 1);
srq->msrq.max_gs = init_attr->attr.max_sge;
- desc_size = max(32UL,
+ desc_size = max(32ULL,
roundup_pow_of_two(sizeof (struct mlx4_wqe_srq_next_seg) +
srq->msrq.max_gs *
sizeof (struct mlx4_wqe_data_seg)));
diff --git a/drivers/infiniband/hw/mthca/mthca_srq.c b/drivers/infiniband/hw/mthca/mthca_srq.c
index a85935ccce88..0c2e14b4142a 100644
--- a/drivers/infiniband/hw/mthca/mthca_srq.c
+++ b/drivers/infiniband/hw/mthca/mthca_srq.c
@@ -225,7 +225,7 @@ int mthca_alloc_srq(struct mthca_dev *dev, struct mthca_pd *pd,
else
srq->max = srq->max + 1;
- ds = max(64UL,
+ ds = max(64ULL,
roundup_pow_of_two(sizeof (struct mthca_next_seg) +
srq->max_gs * sizeof (struct mthca_data_seg)));
diff --git a/drivers/infiniband/sw/rxe/rxe_qp.c b/drivers/infiniband/sw/rxe/rxe_qp.c
index e2c6d1cedf41..040b707b0877 100644
--- a/drivers/infiniband/sw/rxe/rxe_qp.c
+++ b/drivers/infiniband/sw/rxe/rxe_qp.c
@@ -592,7 +592,7 @@ int rxe_qp_from_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask,
int err;
if (mask & IB_QP_MAX_QP_RD_ATOMIC) {
- int max_rd_atomic = __roundup_pow_of_two(attr->max_rd_atomic);
+ int max_rd_atomic = roundup_pow_of_two(attr->max_rd_atomic);
qp->attr.max_rd_atomic = max_rd_atomic;
atomic_set(&qp->req.rd_atomic, max_rd_atomic);
@@ -600,7 +600,7 @@ int rxe_qp_from_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask,
if (mask & IB_QP_MAX_DEST_RD_ATOMIC) {
int max_dest_rd_atomic =
- __roundup_pow_of_two(attr->max_dest_rd_atomic);
+ roundup_pow_of_two(attr->max_dest_rd_atomic);
qp->attr.max_dest_rd_atomic = max_dest_rd_atomic;
diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
index 0c8d81f56a30..ce7c900bd666 100644
--- a/drivers/iommu/intel-iommu.c
+++ b/drivers/iommu/intel-iommu.c
@@ -1488,7 +1488,7 @@ static void iommu_flush_iotlb_psi(struct intel_iommu *iommu,
unsigned long pfn, unsigned int pages,
int ih, int map)
{
- unsigned int mask = ilog2(__roundup_pow_of_two(pages));
+ unsigned int mask = ilog2(roundup_pow_of_two(pages));
uint64_t addr = (uint64_t)pfn << VTD_PAGE_SHIFT;
u16 did = domain->iommu_did[iommu->seq_id];
@@ -3390,7 +3390,7 @@ static unsigned long intel_alloc_iova(struct device *dev,
/* Restrict dma_mask to the width that the iommu can handle */
dma_mask = min_t(uint64_t, DOMAIN_MAX_ADDR(domain->gaw), dma_mask);
/* Ensure we reserve the whole size-aligned region */
- nrpages = __roundup_pow_of_two(nrpages);
+ nrpages = roundup_pow_of_two(nrpages);
if (!dmar_forcedac && dma_mask > DMA_BIT_MASK(32)) {
/*
diff --git a/drivers/iommu/intel-svm.c b/drivers/iommu/intel-svm.c
index 9b159132405d..602caca3cd1a 100644
--- a/drivers/iommu/intel-svm.c
+++ b/drivers/iommu/intel-svm.c
@@ -115,7 +115,7 @@ static void intel_flush_svm_range_dev (struct intel_svm *svm, struct intel_svm_d
QI_EIOTLB_TYPE;
desc.qw1 = 0;
} else {
- int mask = ilog2(__roundup_pow_of_two(pages));
+ int mask = ilog2(roundup_pow_of_two(pages));
desc.qw0 = QI_EIOTLB_PASID(svm->pasid) |
QI_EIOTLB_DID(sdev->did) |
@@ -142,7 +142,7 @@ static void intel_flush_svm_range_dev (struct intel_svm *svm, struct intel_svm_d
* for example, an "address" value of 0x12345f000 will
* flush from 0x123440000 to 0x12347ffff (256KiB). */
unsigned long last = address + ((unsigned long)(pages - 1) << VTD_PAGE_SHIFT);
- unsigned long mask = __rounddown_pow_of_two(address ^ last);
+ unsigned long mask = rounddown_pow_of_two(address ^ last);
desc.qw1 = QI_DEV_EIOTLB_ADDR((address & ~mask) |
(mask - 1)) | QI_DEV_EIOTLB_SIZE;
diff --git a/drivers/iommu/intel_irq_remapping.c b/drivers/iommu/intel_irq_remapping.c
index 81e43c1df7ec..935657b2c661 100644
--- a/drivers/iommu/intel_irq_remapping.c
+++ b/drivers/iommu/intel_irq_remapping.c
@@ -113,7 +113,7 @@ static int alloc_irte(struct intel_iommu *iommu,
return -1;
if (count > 1) {
- count = __roundup_pow_of_two(count);
+ count = roundup_pow_of_two(count);
mask = ilog2(count);
}
diff --git a/drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c b/drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c
index 6a757dadb5f1..fd5b12c23eaa 100644
--- a/drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c
+++ b/drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c
@@ -680,13 +680,13 @@ static int xgbe_set_ringparam(struct net_device *netdev,
return -EINVAL;
}
- rx = __rounddown_pow_of_two(ringparam->rx_pending);
+ rx = rounddown_pow_of_two(ringparam->rx_pending);
if (rx != ringparam->rx_pending)
netdev_notice(netdev,
"rx ring parameter rounded to power of two: %u\n",
rx);
- tx = __rounddown_pow_of_two(ringparam->tx_pending);
+ tx = rounddown_pow_of_two(ringparam->tx_pending);
if (tx != ringparam->tx_pending)
netdev_notice(netdev,
"tx ring parameter rounded to power of two: %u\n",
diff --git a/drivers/net/ethernet/marvell/sky2.c b/drivers/net/ethernet/marvell/sky2.c
index 5f56ee83e3b1..cc3a03b4a611 100644
--- a/drivers/net/ethernet/marvell/sky2.c
+++ b/drivers/net/ethernet/marvell/sky2.c
@@ -4139,7 +4139,7 @@ static int sky2_set_coalesce(struct net_device *dev,
*/
static unsigned long roundup_ring_size(unsigned long pending)
{
- return max(128ul, roundup_pow_of_two(pending+1));
+ return max(128ull, roundup_pow_of_two(pending+1));
}
static void sky2_get_ringparam(struct net_device *dev,
diff --git a/drivers/net/ethernet/rocker/rocker_hw.h b/drivers/net/ethernet/rocker/rocker_hw.h
index 59f1f8b690d2..d8de15509e2c 100644
--- a/drivers/net/ethernet/rocker/rocker_hw.h
+++ b/drivers/net/ethernet/rocker/rocker_hw.h
@@ -88,8 +88,8 @@ enum rocker_dma_type {
};
/* Rocker DMA ring size limits and default sizes */
-#define ROCKER_DMA_SIZE_MIN 2ul
-#define ROCKER_DMA_SIZE_MAX 65536ul
+#define ROCKER_DMA_SIZE_MIN 2ull
+#define ROCKER_DMA_SIZE_MAX 65536ull
#define ROCKER_DMA_CMD_DEFAULT_SIZE 32ul
#define ROCKER_DMA_EVENT_DEFAULT_SIZE 32ul
#define ROCKER_DMA_TX_DEFAULT_SIZE 64ul
diff --git a/drivers/net/ethernet/sfc/ef10.c b/drivers/net/ethernet/sfc/ef10.c
index 4d9bbccc6f89..4f4d9a5b3b75 100644
--- a/drivers/net/ethernet/sfc/ef10.c
+++ b/drivers/net/ethernet/sfc/ef10.c
@@ -27,7 +27,7 @@ enum {
};
/* The maximum size of a shared RSS context */
/* TODO: this should really be from the mcdi protocol export */
-#define EFX_EF10_MAX_SHARED_RSS_CONTEXT_SIZE 64UL
+#define EFX_EF10_MAX_SHARED_RSS_CONTEXT_SIZE 64ULL
/* The filter table(s) are managed by firmware and we have write-only
* access. When removing filters we must identify them to the
diff --git a/drivers/net/ethernet/sfc/efx.h b/drivers/net/ethernet/sfc/efx.h
index 2dd8d5002315..fea2add5860e 100644
--- a/drivers/net/ethernet/sfc/efx.h
+++ b/drivers/net/ethernet/sfc/efx.h
@@ -52,7 +52,7 @@ void efx_schedule_slow_fill(struct efx_rx_queue *rx_queue);
#define EFX_MAX_DMAQ_SIZE 4096UL
#define EFX_DEFAULT_DMAQ_SIZE 1024UL
-#define EFX_MIN_DMAQ_SIZE 512UL
+#define EFX_MIN_DMAQ_SIZE 512ULL
#define EFX_MAX_EVQ_SIZE 16384UL
#define EFX_MIN_EVQ_SIZE 512UL
diff --git a/drivers/net/ethernet/sfc/falcon/efx.h b/drivers/net/ethernet/sfc/falcon/efx.h
index d3b4646545fa..0d16257156d6 100644
--- a/drivers/net/ethernet/sfc/falcon/efx.h
+++ b/drivers/net/ethernet/sfc/falcon/efx.h
@@ -55,7 +55,7 @@ void ef4_schedule_slow_fill(struct ef4_rx_queue *rx_queue);
#define EF4_MAX_DMAQ_SIZE 4096UL
#define EF4_DEFAULT_DMAQ_SIZE 1024UL
-#define EF4_MIN_DMAQ_SIZE 512UL
+#define EF4_MIN_DMAQ_SIZE 512ULL
#define EF4_MAX_EVQ_SIZE 16384UL
#define EF4_MIN_EVQ_SIZE 512UL
diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c
index c7709e49f0e4..f0391e88bc42 100644
--- a/drivers/pci/msi.c
+++ b/drivers/pci/msi.c
@@ -578,7 +578,7 @@ msi_setup_entry(struct pci_dev *dev, int nvec, struct irq_affinity *affd)
entry->msi_attrib.maskbit = !!(control & PCI_MSI_FLAGS_MASKBIT);
entry->msi_attrib.default_irq = dev->irq; /* Save IOAPIC IRQ */
entry->msi_attrib.multi_cap = (control & PCI_MSI_FLAGS_QMASK) >> 1;
- entry->msi_attrib.multiple = ilog2(__roundup_pow_of_two(nvec));
+ entry->msi_attrib.multiple = ilog2(roundup_pow_of_two(nvec));
if (control & PCI_MSI_FLAGS_64BIT)
entry->mask_pos = dev->msi_cap + PCI_MSI_MASK_64;
diff --git a/include/linux/log2.h b/include/linux/log2.h
index 83a4a3ca3e8a..53a727303dac 100644
--- a/include/linux/log2.h
+++ b/include/linux/log2.h
@@ -47,26 +47,6 @@ bool is_power_of_2(unsigned long n)
return (n != 0 && ((n & (n - 1)) == 0));
}
-/**
- * __roundup_pow_of_two() - round up to nearest power of two
- * @n: value to round up
- */
-static inline __attribute__((const))
-unsigned long __roundup_pow_of_two(unsigned long n)
-{
- return 1UL << fls_long(n - 1);
-}
-
-/**
- * __rounddown_pow_of_two() - round down to nearest power of two
- * @n: value to round down
- */
-static inline __attribute__((const))
-unsigned long __rounddown_pow_of_two(unsigned long n)
-{
- return 1UL << (fls_long(n) - 1);
-}
-
/**
* const_ilog2 - log base 2 of 32-bit or a 64-bit constant unsigned value
* @n: parameter
@@ -170,14 +150,11 @@ unsigned long __rounddown_pow_of_two(unsigned long n)
* - the result is undefined when n == 0
* - this can be used to initialise global variables from constant data
*/
-#define roundup_pow_of_two(n) \
-( \
- __builtin_constant_p(n) ? ( \
- (n == 1) ? 1 : \
- (1UL << (ilog2((n) - 1) + 1)) \
- ) : \
- __roundup_pow_of_two(n) \
- )
+#define roundup_pow_of_two(n) \
+( \
+ (__builtin_constant_p(n) && ((n) == 1)) ? \
+ 1 : (1ULL << (ilog2((n) - 1) + 1)) \
+)
/**
* rounddown_pow_of_two - round the given value down to nearest power of two
@@ -187,12 +164,11 @@ unsigned long __rounddown_pow_of_two(unsigned long n)
* - the result is undefined when n == 0
* - this can be used to initialise global variables from constant data
*/
-#define rounddown_pow_of_two(n) \
-( \
- __builtin_constant_p(n) ? ( \
- (1UL << ilog2(n))) : \
- __rounddown_pow_of_two(n) \
- )
+#define rounddown_pow_of_two(n) \
+( \
+ (__builtin_constant_p(n) && ((n) == 1)) ? \
+ 1 : (1ULL << (ilog2(n))) \
+)
static inline __attribute_const__
int __order_base_2(unsigned long n)
diff --git a/kernel/kexec_core.c b/kernel/kexec_core.c
index 15d70a90b50d..bb9efc6944a4 100644
--- a/kernel/kexec_core.c
+++ b/kernel/kexec_core.c
@@ -1094,7 +1094,8 @@ static int __init crash_notes_memory_init(void)
* crash_notes is allocated inside one physical page.
*/
size = sizeof(note_buf_t);
- align = min(roundup_pow_of_two(sizeof(note_buf_t)), PAGE_SIZE);
+ align = min(roundup_pow_of_two(sizeof(note_buf_t)),
+ (unsigned long long)PAGE_SIZE);
/*
* Break compile if size is bigger than PAGE_SIZE since crash_notes
diff --git a/lib/rhashtable.c b/lib/rhashtable.c
index bdb7e4cadf05..70908678c7a8 100644
--- a/lib/rhashtable.c
+++ b/lib/rhashtable.c
@@ -950,7 +950,7 @@ static size_t rounded_hashtable_size(const struct rhashtable_params *params)
if (params->nelem_hint)
retsize = max(roundup_pow_of_two(params->nelem_hint * 4 / 3),
- (unsigned long)params->min_size);
+ (unsigned long long)params->min_size);
else
retsize = max(HASH_DEFAULT_SIZE,
(unsigned long)params->min_size);
diff --git a/net/sunrpc/xprtrdma/verbs.c b/net/sunrpc/xprtrdma/verbs.c
index 77c7dd7f05e8..78fb8ccabddd 100644
--- a/net/sunrpc/xprtrdma/verbs.c
+++ b/net/sunrpc/xprtrdma/verbs.c
@@ -1015,7 +1015,7 @@ struct rpcrdma_req *rpcrdma_req_create(struct rpcrdma_xprt *r_xprt, size_t size,
maxhdrsize = rpcrdma_fixed_maxsz + 3 +
r_xprt->rx_ia.ri_max_segs * rpcrdma_readchunk_maxsz;
maxhdrsize *= sizeof(__be32);
- rb = rpcrdma_regbuf_alloc(__roundup_pow_of_two(maxhdrsize),
+ rb = rpcrdma_regbuf_alloc(roundup_pow_of_two(maxhdrsize),
DMA_TO_DEVICE, flags);
if (!rb)
goto out2;
--
2.24.0
_______________________________________________
kexec mailing list
kexec@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/kexec
^ permalink raw reply related [flat|nested] 71+ messages in thread
* [PATCH v4 8/8] linux/log2.h: Use roundup/dow_pow_two() on 64bit calculations
2019-12-03 11:47 ` Nicolas Saenz Julienne
(?)
@ 2019-12-03 11:47 ` Nicolas Saenz Julienne
-1 siblings, 0 replies; 71+ messages in thread
From: Nicolas Saenz Julienne @ 2019-12-03 11:47 UTC (permalink / raw)
To: andrew.murray, maz, linux-kernel, Lorenzo Pieralisi, Hanjun Guo,
Sudeep Holla, Tariq Toukan, Rob Herring, Frank Rowand,
Florian Fainelli, bcm-kernel-feedback-list, Eric Anholt,
Stefan Wahren, Shawn Lin, Heiko Stuebner, Christoph Hellwig,
Marek Szyprowski, Robin Murphy
Cc: james.quinlan, mbrugger, phil, jeremy.linton, linux-pci,
linux-rpi-kernel, Nicolas Saenz Julienne, Rafael J. Wysocki,
Len Brown, David S. Miller, Bjorn Helgaas, linux-acpi,
linux-arm-kernel, netdev, linux-rdma, devicetree, linux-rockchip,
iommu
The function now is safe to use while expecting a 64bit value. Use it
where relevant.
Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
---
drivers/acpi/arm64/iort.c | 2 +-
drivers/net/ethernet/mellanox/mlx4/en_clock.c | 3 ++-
drivers/of/device.c | 3 ++-
drivers/pci/controller/cadence/pcie-cadence-ep.c | 3 ++-
drivers/pci/controller/cadence/pcie-cadence.c | 3 ++-
drivers/pci/controller/pcie-brcmstb.c | 3 ++-
drivers/pci/controller/pcie-rockchip-ep.c | 5 +++--
kernel/dma/direct.c | 2 +-
8 files changed, 15 insertions(+), 9 deletions(-)
diff --git a/drivers/acpi/arm64/iort.c b/drivers/acpi/arm64/iort.c
index 33f71983e001..9950c9757092 100644
--- a/drivers/acpi/arm64/iort.c
+++ b/drivers/acpi/arm64/iort.c
@@ -1090,7 +1090,7 @@ void iort_dma_setup(struct device *dev, u64 *dma_addr, u64 *dma_size)
* firmware.
*/
end = dmaaddr + size - 1;
- mask = DMA_BIT_MASK(ilog2(end) + 1);
+ mask = roundup_pow_of_two(end) - 1;
dev->bus_dma_limit = end;
dev->coherent_dma_mask = mask;
*dev->dma_mask = mask;
diff --git a/drivers/net/ethernet/mellanox/mlx4/en_clock.c b/drivers/net/ethernet/mellanox/mlx4/en_clock.c
index 024788549c25..23dcb18224d4 100644
--- a/drivers/net/ethernet/mellanox/mlx4/en_clock.c
+++ b/drivers/net/ethernet/mellanox/mlx4/en_clock.c
@@ -33,6 +33,7 @@
#include <linux/mlx4/device.h>
#include <linux/clocksource.h>
+#include <linux/log2.h>
#include "mlx4_en.h"
@@ -252,7 +253,7 @@ static u32 freq_to_shift(u16 freq)
{
u32 freq_khz = freq * 1000;
u64 max_val_cycles = freq_khz * 1000 * MLX4_EN_WRAP_AROUND_SEC;
- u64 max_val_cycles_rounded = 1ULL << fls64(max_val_cycles - 1);
+ u64 max_val_cycles_rounded = roundup_pow_of_two(max_val_cycles);
/* calculate max possible multiplier in order to fit in 64bit */
u64 max_mul = div64_u64(ULLONG_MAX, max_val_cycles_rounded);
diff --git a/drivers/of/device.c b/drivers/of/device.c
index e9127db7b067..7259922d2078 100644
--- a/drivers/of/device.c
+++ b/drivers/of/device.c
@@ -11,6 +11,7 @@
#include <linux/mod_devicetable.h>
#include <linux/slab.h>
#include <linux/platform_device.h>
+#include <linux/log2.h>
#include <asm/errno.h>
#include "of_private.h"
@@ -149,7 +150,7 @@ int of_dma_configure(struct device *dev, struct device_node *np, bool force_dma)
* set by the driver.
*/
end = dma_addr + size - 1;
- mask = DMA_BIT_MASK(ilog2(end) + 1);
+ mask = roundup_pow_of_two(end) - 1;
dev->coherent_dma_mask &= mask;
*dev->dma_mask &= mask;
/* ...but only set bus limit if we found valid dma-ranges earlier */
diff --git a/drivers/pci/controller/cadence/pcie-cadence-ep.c b/drivers/pci/controller/cadence/pcie-cadence-ep.c
index 1c173dad67d1..72eda0b2f939 100644
--- a/drivers/pci/controller/cadence/pcie-cadence-ep.c
+++ b/drivers/pci/controller/cadence/pcie-cadence-ep.c
@@ -10,6 +10,7 @@
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/sizes.h>
+#include <linux/log2.h>
#include "pcie-cadence.h"
@@ -65,7 +66,7 @@ static int cdns_pcie_ep_set_bar(struct pci_epc *epc, u8 fn,
* roundup_pow_of_two() returns an unsigned long, which is not suited
* for 64bit values.
*/
- sz = 1ULL << fls64(sz - 1);
+ sz = roundup_pow_of_two(sz);
aperture = ilog2(sz) - 7; /* 128B -> 0, 256B -> 1, 512B -> 2, ... */
if ((flags & PCI_BASE_ADDRESS_SPACE) == PCI_BASE_ADDRESS_SPACE_IO) {
diff --git a/drivers/pci/controller/cadence/pcie-cadence.c b/drivers/pci/controller/cadence/pcie-cadence.c
index cd795f6fc1e2..b1689f725b41 100644
--- a/drivers/pci/controller/cadence/pcie-cadence.c
+++ b/drivers/pci/controller/cadence/pcie-cadence.c
@@ -4,6 +4,7 @@
// Author: Cyrille Pitchen <cyrille.pitchen@free-electrons.com>
#include <linux/kernel.h>
+#include <linux/log2.h>
#include "pcie-cadence.h"
@@ -15,7 +16,7 @@ void cdns_pcie_set_outbound_region(struct cdns_pcie *pcie, u8 fn,
* roundup_pow_of_two() returns an unsigned long, which is not suited
* for 64bit values.
*/
- u64 sz = 1ULL << fls64(size - 1);
+ u64 sz = roundup_pow_of_two(size);
int nbits = ilog2(sz);
u32 addr0, addr1, desc0, desc1;
diff --git a/drivers/pci/controller/pcie-brcmstb.c b/drivers/pci/controller/pcie-brcmstb.c
index 7ba06a0e1a71..e705d9d73030 100644
--- a/drivers/pci/controller/pcie-brcmstb.c
+++ b/drivers/pci/controller/pcie-brcmstb.c
@@ -627,7 +627,8 @@ static inline int brcm_pcie_get_rc_bar2_size_and_offset(struct brcm_pcie *pcie,
return -ENODEV;
*rc_bar2_offset = -entry->offset;
- *rc_bar2_size = 1ULL << fls64(entry->res->end - entry->res->start);
+ *rc_bar2_size = roundup_pow_of_two(entry->res->end -
+ entry->res->start + 1);
/*
* We validate the inbound memory view even though we should trust
diff --git a/drivers/pci/controller/pcie-rockchip-ep.c b/drivers/pci/controller/pcie-rockchip-ep.c
index d743b0a48988..83665f5f804a 100644
--- a/drivers/pci/controller/pcie-rockchip-ep.c
+++ b/drivers/pci/controller/pcie-rockchip-ep.c
@@ -16,6 +16,7 @@
#include <linux/platform_device.h>
#include <linux/pci-epf.h>
#include <linux/sizes.h>
+#include <linux/log2.h>
#include "pcie-rockchip.h"
@@ -70,7 +71,7 @@ static void rockchip_pcie_prog_ep_ob_atu(struct rockchip_pcie *rockchip, u8 fn,
u32 r, u32 type, u64 cpu_addr,
u64 pci_addr, size_t size)
{
- u64 sz = 1ULL << fls64(size - 1);
+ u64 sz = roundup_pow_of_two(size);
int num_pass_bits = ilog2(sz);
u32 addr0, addr1, desc0, desc1;
bool is_nor_msg = (type == AXI_WRAPPER_NOR_MSG);
@@ -176,7 +177,7 @@ static int rockchip_pcie_ep_set_bar(struct pci_epc *epc, u8 fn,
* roundup_pow_of_two() returns an unsigned long, which is not suited
* for 64bit values.
*/
- sz = 1ULL << fls64(sz - 1);
+ sz = roundup_pow_of_two(sz);
aperture = ilog2(sz) - 7; /* 128B -> 0, 256B -> 1, 512B -> 2, ... */
if ((flags & PCI_BASE_ADDRESS_SPACE) == PCI_BASE_ADDRESS_SPACE_IO) {
diff --git a/kernel/dma/direct.c b/kernel/dma/direct.c
index 6af7ae83c4ad..056886c4efec 100644
--- a/kernel/dma/direct.c
+++ b/kernel/dma/direct.c
@@ -53,7 +53,7 @@ u64 dma_direct_get_required_mask(struct device *dev)
{
u64 max_dma = phys_to_dma_direct(dev, (max_pfn - 1) << PAGE_SHIFT);
- return (1ULL << (fls64(max_dma) - 1)) * 2 - 1;
+ return rounddown_pow_of_two(max_dma) * 2 - 1;
}
static gfp_t __dma_direct_optimal_gfp_mask(struct device *dev, u64 dma_mask,
--
2.24.0
^ permalink raw reply related [flat|nested] 71+ messages in thread
* [PATCH v4 8/8] linux/log2.h: Use roundup/dow_pow_two() on 64bit calculations
@ 2019-12-03 11:47 ` Nicolas Saenz Julienne
0 siblings, 0 replies; 71+ messages in thread
From: Nicolas Saenz Julienne @ 2019-12-03 11:47 UTC (permalink / raw)
To: andrew.murray, maz, linux-kernel, Lorenzo Pieralisi, Hanjun Guo,
Sudeep Holla, Tariq Toukan, Rob Herring, Frank Rowand,
Florian Fainelli, bcm-kernel-feedback-list, Eric Anholt,
Stefan Wahren, Shawn Lin, Heiko Stuebner, Christoph Hellwig,
Marek Szyprowski, Robin Murphy
Cc: linux-arm-kernel, Rafael J. Wysocki, mbrugger, devicetree,
linux-rdma, linux-pci, phil, jeremy.linton, linux-acpi, iommu,
linux-rpi-kernel, james.quinlan, netdev, Bjorn Helgaas,
linux-rockchip, David S. Miller, Nicolas Saenz Julienne,
Len Brown
The function now is safe to use while expecting a 64bit value. Use it
where relevant.
Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
---
drivers/acpi/arm64/iort.c | 2 +-
drivers/net/ethernet/mellanox/mlx4/en_clock.c | 3 ++-
drivers/of/device.c | 3 ++-
drivers/pci/controller/cadence/pcie-cadence-ep.c | 3 ++-
drivers/pci/controller/cadence/pcie-cadence.c | 3 ++-
drivers/pci/controller/pcie-brcmstb.c | 3 ++-
drivers/pci/controller/pcie-rockchip-ep.c | 5 +++--
kernel/dma/direct.c | 2 +-
8 files changed, 15 insertions(+), 9 deletions(-)
diff --git a/drivers/acpi/arm64/iort.c b/drivers/acpi/arm64/iort.c
index 33f71983e001..9950c9757092 100644
--- a/drivers/acpi/arm64/iort.c
+++ b/drivers/acpi/arm64/iort.c
@@ -1090,7 +1090,7 @@ void iort_dma_setup(struct device *dev, u64 *dma_addr, u64 *dma_size)
* firmware.
*/
end = dmaaddr + size - 1;
- mask = DMA_BIT_MASK(ilog2(end) + 1);
+ mask = roundup_pow_of_two(end) - 1;
dev->bus_dma_limit = end;
dev->coherent_dma_mask = mask;
*dev->dma_mask = mask;
diff --git a/drivers/net/ethernet/mellanox/mlx4/en_clock.c b/drivers/net/ethernet/mellanox/mlx4/en_clock.c
index 024788549c25..23dcb18224d4 100644
--- a/drivers/net/ethernet/mellanox/mlx4/en_clock.c
+++ b/drivers/net/ethernet/mellanox/mlx4/en_clock.c
@@ -33,6 +33,7 @@
#include <linux/mlx4/device.h>
#include <linux/clocksource.h>
+#include <linux/log2.h>
#include "mlx4_en.h"
@@ -252,7 +253,7 @@ static u32 freq_to_shift(u16 freq)
{
u32 freq_khz = freq * 1000;
u64 max_val_cycles = freq_khz * 1000 * MLX4_EN_WRAP_AROUND_SEC;
- u64 max_val_cycles_rounded = 1ULL << fls64(max_val_cycles - 1);
+ u64 max_val_cycles_rounded = roundup_pow_of_two(max_val_cycles);
/* calculate max possible multiplier in order to fit in 64bit */
u64 max_mul = div64_u64(ULLONG_MAX, max_val_cycles_rounded);
diff --git a/drivers/of/device.c b/drivers/of/device.c
index e9127db7b067..7259922d2078 100644
--- a/drivers/of/device.c
+++ b/drivers/of/device.c
@@ -11,6 +11,7 @@
#include <linux/mod_devicetable.h>
#include <linux/slab.h>
#include <linux/platform_device.h>
+#include <linux/log2.h>
#include <asm/errno.h>
#include "of_private.h"
@@ -149,7 +150,7 @@ int of_dma_configure(struct device *dev, struct device_node *np, bool force_dma)
* set by the driver.
*/
end = dma_addr + size - 1;
- mask = DMA_BIT_MASK(ilog2(end) + 1);
+ mask = roundup_pow_of_two(end) - 1;
dev->coherent_dma_mask &= mask;
*dev->dma_mask &= mask;
/* ...but only set bus limit if we found valid dma-ranges earlier */
diff --git a/drivers/pci/controller/cadence/pcie-cadence-ep.c b/drivers/pci/controller/cadence/pcie-cadence-ep.c
index 1c173dad67d1..72eda0b2f939 100644
--- a/drivers/pci/controller/cadence/pcie-cadence-ep.c
+++ b/drivers/pci/controller/cadence/pcie-cadence-ep.c
@@ -10,6 +10,7 @@
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/sizes.h>
+#include <linux/log2.h>
#include "pcie-cadence.h"
@@ -65,7 +66,7 @@ static int cdns_pcie_ep_set_bar(struct pci_epc *epc, u8 fn,
* roundup_pow_of_two() returns an unsigned long, which is not suited
* for 64bit values.
*/
- sz = 1ULL << fls64(sz - 1);
+ sz = roundup_pow_of_two(sz);
aperture = ilog2(sz) - 7; /* 128B -> 0, 256B -> 1, 512B -> 2, ... */
if ((flags & PCI_BASE_ADDRESS_SPACE) == PCI_BASE_ADDRESS_SPACE_IO) {
diff --git a/drivers/pci/controller/cadence/pcie-cadence.c b/drivers/pci/controller/cadence/pcie-cadence.c
index cd795f6fc1e2..b1689f725b41 100644
--- a/drivers/pci/controller/cadence/pcie-cadence.c
+++ b/drivers/pci/controller/cadence/pcie-cadence.c
@@ -4,6 +4,7 @@
// Author: Cyrille Pitchen <cyrille.pitchen@free-electrons.com>
#include <linux/kernel.h>
+#include <linux/log2.h>
#include "pcie-cadence.h"
@@ -15,7 +16,7 @@ void cdns_pcie_set_outbound_region(struct cdns_pcie *pcie, u8 fn,
* roundup_pow_of_two() returns an unsigned long, which is not suited
* for 64bit values.
*/
- u64 sz = 1ULL << fls64(size - 1);
+ u64 sz = roundup_pow_of_two(size);
int nbits = ilog2(sz);
u32 addr0, addr1, desc0, desc1;
diff --git a/drivers/pci/controller/pcie-brcmstb.c b/drivers/pci/controller/pcie-brcmstb.c
index 7ba06a0e1a71..e705d9d73030 100644
--- a/drivers/pci/controller/pcie-brcmstb.c
+++ b/drivers/pci/controller/pcie-brcmstb.c
@@ -627,7 +627,8 @@ static inline int brcm_pcie_get_rc_bar2_size_and_offset(struct brcm_pcie *pcie,
return -ENODEV;
*rc_bar2_offset = -entry->offset;
- *rc_bar2_size = 1ULL << fls64(entry->res->end - entry->res->start);
+ *rc_bar2_size = roundup_pow_of_two(entry->res->end -
+ entry->res->start + 1);
/*
* We validate the inbound memory view even though we should trust
diff --git a/drivers/pci/controller/pcie-rockchip-ep.c b/drivers/pci/controller/pcie-rockchip-ep.c
index d743b0a48988..83665f5f804a 100644
--- a/drivers/pci/controller/pcie-rockchip-ep.c
+++ b/drivers/pci/controller/pcie-rockchip-ep.c
@@ -16,6 +16,7 @@
#include <linux/platform_device.h>
#include <linux/pci-epf.h>
#include <linux/sizes.h>
+#include <linux/log2.h>
#include "pcie-rockchip.h"
@@ -70,7 +71,7 @@ static void rockchip_pcie_prog_ep_ob_atu(struct rockchip_pcie *rockchip, u8 fn,
u32 r, u32 type, u64 cpu_addr,
u64 pci_addr, size_t size)
{
- u64 sz = 1ULL << fls64(size - 1);
+ u64 sz = roundup_pow_of_two(size);
int num_pass_bits = ilog2(sz);
u32 addr0, addr1, desc0, desc1;
bool is_nor_msg = (type == AXI_WRAPPER_NOR_MSG);
@@ -176,7 +177,7 @@ static int rockchip_pcie_ep_set_bar(struct pci_epc *epc, u8 fn,
* roundup_pow_of_two() returns an unsigned long, which is not suited
* for 64bit values.
*/
- sz = 1ULL << fls64(sz - 1);
+ sz = roundup_pow_of_two(sz);
aperture = ilog2(sz) - 7; /* 128B -> 0, 256B -> 1, 512B -> 2, ... */
if ((flags & PCI_BASE_ADDRESS_SPACE) == PCI_BASE_ADDRESS_SPACE_IO) {
diff --git a/kernel/dma/direct.c b/kernel/dma/direct.c
index 6af7ae83c4ad..056886c4efec 100644
--- a/kernel/dma/direct.c
+++ b/kernel/dma/direct.c
@@ -53,7 +53,7 @@ u64 dma_direct_get_required_mask(struct device *dev)
{
u64 max_dma = phys_to_dma_direct(dev, (max_pfn - 1) << PAGE_SHIFT);
- return (1ULL << (fls64(max_dma) - 1)) * 2 - 1;
+ return rounddown_pow_of_two(max_dma) * 2 - 1;
}
static gfp_t __dma_direct_optimal_gfp_mask(struct device *dev, u64 dma_mask,
--
2.24.0
_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu
^ permalink raw reply related [flat|nested] 71+ messages in thread
* [PATCH v4 8/8] linux/log2.h: Use roundup/dow_pow_two() on 64bit calculations
@ 2019-12-03 11:47 ` Nicolas Saenz Julienne
0 siblings, 0 replies; 71+ messages in thread
From: Nicolas Saenz Julienne @ 2019-12-03 11:47 UTC (permalink / raw)
To: andrew.murray, maz, linux-kernel, Lorenzo Pieralisi, Hanjun Guo,
Sudeep Holla, Tariq Toukan, Rob Herring, Frank Rowand,
Florian Fainelli, bcm-kernel-feedback-list, Eric Anholt,
Stefan Wahren, Shawn Lin, Heiko Stuebner, Christoph Hellwig,
Marek Szyprowski, Robin Murphy
Cc: linux-arm-kernel, Rafael J. Wysocki, mbrugger, devicetree,
linux-rdma, linux-pci, phil, jeremy.linton, linux-acpi, iommu,
linux-rpi-kernel, james.quinlan, netdev, Bjorn Helgaas,
linux-rockchip, David S. Miller, Nicolas Saenz Julienne,
Len Brown
The function now is safe to use while expecting a 64bit value. Use it
where relevant.
Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
---
drivers/acpi/arm64/iort.c | 2 +-
drivers/net/ethernet/mellanox/mlx4/en_clock.c | 3 ++-
drivers/of/device.c | 3 ++-
drivers/pci/controller/cadence/pcie-cadence-ep.c | 3 ++-
drivers/pci/controller/cadence/pcie-cadence.c | 3 ++-
drivers/pci/controller/pcie-brcmstb.c | 3 ++-
drivers/pci/controller/pcie-rockchip-ep.c | 5 +++--
kernel/dma/direct.c | 2 +-
8 files changed, 15 insertions(+), 9 deletions(-)
diff --git a/drivers/acpi/arm64/iort.c b/drivers/acpi/arm64/iort.c
index 33f71983e001..9950c9757092 100644
--- a/drivers/acpi/arm64/iort.c
+++ b/drivers/acpi/arm64/iort.c
@@ -1090,7 +1090,7 @@ void iort_dma_setup(struct device *dev, u64 *dma_addr, u64 *dma_size)
* firmware.
*/
end = dmaaddr + size - 1;
- mask = DMA_BIT_MASK(ilog2(end) + 1);
+ mask = roundup_pow_of_two(end) - 1;
dev->bus_dma_limit = end;
dev->coherent_dma_mask = mask;
*dev->dma_mask = mask;
diff --git a/drivers/net/ethernet/mellanox/mlx4/en_clock.c b/drivers/net/ethernet/mellanox/mlx4/en_clock.c
index 024788549c25..23dcb18224d4 100644
--- a/drivers/net/ethernet/mellanox/mlx4/en_clock.c
+++ b/drivers/net/ethernet/mellanox/mlx4/en_clock.c
@@ -33,6 +33,7 @@
#include <linux/mlx4/device.h>
#include <linux/clocksource.h>
+#include <linux/log2.h>
#include "mlx4_en.h"
@@ -252,7 +253,7 @@ static u32 freq_to_shift(u16 freq)
{
u32 freq_khz = freq * 1000;
u64 max_val_cycles = freq_khz * 1000 * MLX4_EN_WRAP_AROUND_SEC;
- u64 max_val_cycles_rounded = 1ULL << fls64(max_val_cycles - 1);
+ u64 max_val_cycles_rounded = roundup_pow_of_two(max_val_cycles);
/* calculate max possible multiplier in order to fit in 64bit */
u64 max_mul = div64_u64(ULLONG_MAX, max_val_cycles_rounded);
diff --git a/drivers/of/device.c b/drivers/of/device.c
index e9127db7b067..7259922d2078 100644
--- a/drivers/of/device.c
+++ b/drivers/of/device.c
@@ -11,6 +11,7 @@
#include <linux/mod_devicetable.h>
#include <linux/slab.h>
#include <linux/platform_device.h>
+#include <linux/log2.h>
#include <asm/errno.h>
#include "of_private.h"
@@ -149,7 +150,7 @@ int of_dma_configure(struct device *dev, struct device_node *np, bool force_dma)
* set by the driver.
*/
end = dma_addr + size - 1;
- mask = DMA_BIT_MASK(ilog2(end) + 1);
+ mask = roundup_pow_of_two(end) - 1;
dev->coherent_dma_mask &= mask;
*dev->dma_mask &= mask;
/* ...but only set bus limit if we found valid dma-ranges earlier */
diff --git a/drivers/pci/controller/cadence/pcie-cadence-ep.c b/drivers/pci/controller/cadence/pcie-cadence-ep.c
index 1c173dad67d1..72eda0b2f939 100644
--- a/drivers/pci/controller/cadence/pcie-cadence-ep.c
+++ b/drivers/pci/controller/cadence/pcie-cadence-ep.c
@@ -10,6 +10,7 @@
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/sizes.h>
+#include <linux/log2.h>
#include "pcie-cadence.h"
@@ -65,7 +66,7 @@ static int cdns_pcie_ep_set_bar(struct pci_epc *epc, u8 fn,
* roundup_pow_of_two() returns an unsigned long, which is not suited
* for 64bit values.
*/
- sz = 1ULL << fls64(sz - 1);
+ sz = roundup_pow_of_two(sz);
aperture = ilog2(sz) - 7; /* 128B -> 0, 256B -> 1, 512B -> 2, ... */
if ((flags & PCI_BASE_ADDRESS_SPACE) == PCI_BASE_ADDRESS_SPACE_IO) {
diff --git a/drivers/pci/controller/cadence/pcie-cadence.c b/drivers/pci/controller/cadence/pcie-cadence.c
index cd795f6fc1e2..b1689f725b41 100644
--- a/drivers/pci/controller/cadence/pcie-cadence.c
+++ b/drivers/pci/controller/cadence/pcie-cadence.c
@@ -4,6 +4,7 @@
// Author: Cyrille Pitchen <cyrille.pitchen@free-electrons.com>
#include <linux/kernel.h>
+#include <linux/log2.h>
#include "pcie-cadence.h"
@@ -15,7 +16,7 @@ void cdns_pcie_set_outbound_region(struct cdns_pcie *pcie, u8 fn,
* roundup_pow_of_two() returns an unsigned long, which is not suited
* for 64bit values.
*/
- u64 sz = 1ULL << fls64(size - 1);
+ u64 sz = roundup_pow_of_two(size);
int nbits = ilog2(sz);
u32 addr0, addr1, desc0, desc1;
diff --git a/drivers/pci/controller/pcie-brcmstb.c b/drivers/pci/controller/pcie-brcmstb.c
index 7ba06a0e1a71..e705d9d73030 100644
--- a/drivers/pci/controller/pcie-brcmstb.c
+++ b/drivers/pci/controller/pcie-brcmstb.c
@@ -627,7 +627,8 @@ static inline int brcm_pcie_get_rc_bar2_size_and_offset(struct brcm_pcie *pcie,
return -ENODEV;
*rc_bar2_offset = -entry->offset;
- *rc_bar2_size = 1ULL << fls64(entry->res->end - entry->res->start);
+ *rc_bar2_size = roundup_pow_of_two(entry->res->end -
+ entry->res->start + 1);
/*
* We validate the inbound memory view even though we should trust
diff --git a/drivers/pci/controller/pcie-rockchip-ep.c b/drivers/pci/controller/pcie-rockchip-ep.c
index d743b0a48988..83665f5f804a 100644
--- a/drivers/pci/controller/pcie-rockchip-ep.c
+++ b/drivers/pci/controller/pcie-rockchip-ep.c
@@ -16,6 +16,7 @@
#include <linux/platform_device.h>
#include <linux/pci-epf.h>
#include <linux/sizes.h>
+#include <linux/log2.h>
#include "pcie-rockchip.h"
@@ -70,7 +71,7 @@ static void rockchip_pcie_prog_ep_ob_atu(struct rockchip_pcie *rockchip, u8 fn,
u32 r, u32 type, u64 cpu_addr,
u64 pci_addr, size_t size)
{
- u64 sz = 1ULL << fls64(size - 1);
+ u64 sz = roundup_pow_of_two(size);
int num_pass_bits = ilog2(sz);
u32 addr0, addr1, desc0, desc1;
bool is_nor_msg = (type == AXI_WRAPPER_NOR_MSG);
@@ -176,7 +177,7 @@ static int rockchip_pcie_ep_set_bar(struct pci_epc *epc, u8 fn,
* roundup_pow_of_two() returns an unsigned long, which is not suited
* for 64bit values.
*/
- sz = 1ULL << fls64(sz - 1);
+ sz = roundup_pow_of_two(sz);
aperture = ilog2(sz) - 7; /* 128B -> 0, 256B -> 1, 512B -> 2, ... */
if ((flags & PCI_BASE_ADDRESS_SPACE) == PCI_BASE_ADDRESS_SPACE_IO) {
diff --git a/kernel/dma/direct.c b/kernel/dma/direct.c
index 6af7ae83c4ad..056886c4efec 100644
--- a/kernel/dma/direct.c
+++ b/kernel/dma/direct.c
@@ -53,7 +53,7 @@ u64 dma_direct_get_required_mask(struct device *dev)
{
u64 max_dma = phys_to_dma_direct(dev, (max_pfn - 1) << PAGE_SHIFT);
- return (1ULL << (fls64(max_dma) - 1)) * 2 - 1;
+ return rounddown_pow_of_two(max_dma) * 2 - 1;
}
static gfp_t __dma_direct_optimal_gfp_mask(struct device *dev, u64 dma_mask,
--
2.24.0
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply related [flat|nested] 71+ messages in thread
* Re: [PATCH v4 1/8] dt-bindings: PCI: Add bindings for brcmstb's PCIe device
2019-12-03 11:47 ` Nicolas Saenz Julienne
@ 2019-12-03 15:03 ` Andrew Murray
-1 siblings, 0 replies; 71+ messages in thread
From: Andrew Murray @ 2019-12-03 15:03 UTC (permalink / raw)
To: Nicolas Saenz Julienne
Cc: maz, linux-kernel, Florian Fainelli, bcm-kernel-feedback-list,
Eric Anholt, Stefan Wahren, Bjorn Helgaas, james.quinlan,
mbrugger, phil, jeremy.linton, linux-pci, linux-rpi-kernel,
Rob Herring, Rob Herring, Mark Rutland, linux-arm-kernel,
devicetree
On Tue, Dec 03, 2019 at 12:47:34PM +0100, Nicolas Saenz Julienne wrote:
> From: Jim Quinlan <james.quinlan@broadcom.com>
>
> The DT bindings description of the brcmstb PCIe device is described.
> This node can only be used for now on the Raspberry Pi 4.
>
> Signed-off-by: Jim Quinlan <james.quinlan@broadcom.com>
> Co-developed-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
> Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
> Reviewed-by: Rob Herring <robh@kernel.org>
>
> ---
Reviewed-by: Andrew Murray <andrew.murray@arm.com>
>
> Changes since v2:
> - Add pci reference schema
> - Drop all default properties
> - Assume msi-controller and msi-parent are properly defined
> - Add num entries on multiple properties
> - use unevaluatedProperties
> - Update required properties
> - Fix license
>
> Changes since v1:
> - Fix commit Subject
> - Remove linux,pci-domain
>
> This was based on Jim's original submission[1], converted to yaml and
> adapted to the RPi4 case.
>
> [1] https://patchwork.kernel.org/patch/10605937/
>
> .../bindings/pci/brcm,stb-pcie.yaml | 97 +++++++++++++++++++
> 1 file changed, 97 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/pci/brcm,stb-pcie.yaml
>
> diff --git a/Documentation/devicetree/bindings/pci/brcm,stb-pcie.yaml b/Documentation/devicetree/bindings/pci/brcm,stb-pcie.yaml
> new file mode 100644
> index 000000000000..77d3e81a437b
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/pci/brcm,stb-pcie.yaml
> @@ -0,0 +1,97 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/pci/brcm,stb-pcie.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Brcmstb PCIe Host Controller Device Tree Bindings
> +
> +maintainers:
> + - Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
> +
> +allOf:
> + - $ref: /schemas/pci/pci-bus.yaml#
> +
> +properties:
> + compatible:
> + const: brcm,bcm2711-pcie # The Raspberry Pi 4
> +
> + reg:
> + maxItems: 1
> +
> + interrupts:
> + minItems: 1
> + maxItems: 2
> + items:
> + - description: PCIe host controller
> + - description: builtin MSI controller
> +
> + interrupt-names:
> + minItems: 1
> + maxItems: 2
> + items:
> + - const: pcie
> + - const: msi
> +
> + ranges:
> + maxItems: 1
> +
> + dma-ranges:
> + maxItems: 1
> +
> + clocks:
> + maxItems: 1
> +
> + clock-names:
> + items:
> + - const: sw_pcie
> +
> + msi-controller:
> + description: Identifies the node as an MSI controller.
> +
> + msi-parent:
> + description: MSI controller the device is capable of using.
> +
> + brcm,enable-ssc:
> + description: Indicates usage of spread-spectrum clocking.
> + type: boolean
> +
> +required:
> + - reg
> + - dma-ranges
> + - "#interrupt-cells"
> + - interrupts
> + - interrupt-names
> + - interrupt-map-mask
> + - interrupt-map
> + - msi-controller
> +
> +unevaluatedProperties: false
> +
> +examples:
> + - |
> + #include <dt-bindings/interrupt-controller/irq.h>
> + #include <dt-bindings/interrupt-controller/arm-gic.h>
> +
> + scb {
> + #address-cells = <2>;
> + #size-cells = <1>;
> + pcie0: pcie@7d500000 {
> + compatible = "brcm,bcm2711-pcie";
> + reg = <0x0 0x7d500000 0x9310>;
> + device_type = "pci";
> + #address-cells = <3>;
> + #size-cells = <2>;
> + #interrupt-cells = <1>;
> + interrupts = <GIC_SPI 148 IRQ_TYPE_LEVEL_HIGH>,
> + <GIC_SPI 148 IRQ_TYPE_LEVEL_HIGH>;
> + interrupt-names = "pcie", "msi";
> + interrupt-map-mask = <0x0 0x0 0x0 0x7>;
> + interrupt-map = <0 0 0 1 &gicv2 GIC_SPI 143 IRQ_TYPE_LEVEL_HIGH>;
> + msi-parent = <&pcie0>;
> + msi-controller;
> + ranges = <0x02000000 0x0 0xf8000000 0x6 0x00000000 0x0 0x04000000>;
> + dma-ranges = <0x02000000 0x0 0x00000000 0x0 0x00000000 0x0 0x80000000>;
> + brcm,enable-ssc;
> + };
> + };
> --
> 2.24.0
>
^ permalink raw reply [flat|nested] 71+ messages in thread
* Re: [PATCH v4 1/8] dt-bindings: PCI: Add bindings for brcmstb's PCIe device
@ 2019-12-03 15:03 ` Andrew Murray
0 siblings, 0 replies; 71+ messages in thread
From: Andrew Murray @ 2019-12-03 15:03 UTC (permalink / raw)
To: Nicolas Saenz Julienne
Cc: Mark Rutland, Rob Herring, Florian Fainelli, Rob Herring,
devicetree, maz, phil, linux-kernel, jeremy.linton, Eric Anholt,
mbrugger, bcm-kernel-feedback-list, Stefan Wahren, james.quinlan,
linux-pci, Bjorn Helgaas, linux-arm-kernel, linux-rpi-kernel
On Tue, Dec 03, 2019 at 12:47:34PM +0100, Nicolas Saenz Julienne wrote:
> From: Jim Quinlan <james.quinlan@broadcom.com>
>
> The DT bindings description of the brcmstb PCIe device is described.
> This node can only be used for now on the Raspberry Pi 4.
>
> Signed-off-by: Jim Quinlan <james.quinlan@broadcom.com>
> Co-developed-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
> Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
> Reviewed-by: Rob Herring <robh@kernel.org>
>
> ---
Reviewed-by: Andrew Murray <andrew.murray@arm.com>
>
> Changes since v2:
> - Add pci reference schema
> - Drop all default properties
> - Assume msi-controller and msi-parent are properly defined
> - Add num entries on multiple properties
> - use unevaluatedProperties
> - Update required properties
> - Fix license
>
> Changes since v1:
> - Fix commit Subject
> - Remove linux,pci-domain
>
> This was based on Jim's original submission[1], converted to yaml and
> adapted to the RPi4 case.
>
> [1] https://patchwork.kernel.org/patch/10605937/
>
> .../bindings/pci/brcm,stb-pcie.yaml | 97 +++++++++++++++++++
> 1 file changed, 97 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/pci/brcm,stb-pcie.yaml
>
> diff --git a/Documentation/devicetree/bindings/pci/brcm,stb-pcie.yaml b/Documentation/devicetree/bindings/pci/brcm,stb-pcie.yaml
> new file mode 100644
> index 000000000000..77d3e81a437b
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/pci/brcm,stb-pcie.yaml
> @@ -0,0 +1,97 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/pci/brcm,stb-pcie.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Brcmstb PCIe Host Controller Device Tree Bindings
> +
> +maintainers:
> + - Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
> +
> +allOf:
> + - $ref: /schemas/pci/pci-bus.yaml#
> +
> +properties:
> + compatible:
> + const: brcm,bcm2711-pcie # The Raspberry Pi 4
> +
> + reg:
> + maxItems: 1
> +
> + interrupts:
> + minItems: 1
> + maxItems: 2
> + items:
> + - description: PCIe host controller
> + - description: builtin MSI controller
> +
> + interrupt-names:
> + minItems: 1
> + maxItems: 2
> + items:
> + - const: pcie
> + - const: msi
> +
> + ranges:
> + maxItems: 1
> +
> + dma-ranges:
> + maxItems: 1
> +
> + clocks:
> + maxItems: 1
> +
> + clock-names:
> + items:
> + - const: sw_pcie
> +
> + msi-controller:
> + description: Identifies the node as an MSI controller.
> +
> + msi-parent:
> + description: MSI controller the device is capable of using.
> +
> + brcm,enable-ssc:
> + description: Indicates usage of spread-spectrum clocking.
> + type: boolean
> +
> +required:
> + - reg
> + - dma-ranges
> + - "#interrupt-cells"
> + - interrupts
> + - interrupt-names
> + - interrupt-map-mask
> + - interrupt-map
> + - msi-controller
> +
> +unevaluatedProperties: false
> +
> +examples:
> + - |
> + #include <dt-bindings/interrupt-controller/irq.h>
> + #include <dt-bindings/interrupt-controller/arm-gic.h>
> +
> + scb {
> + #address-cells = <2>;
> + #size-cells = <1>;
> + pcie0: pcie@7d500000 {
> + compatible = "brcm,bcm2711-pcie";
> + reg = <0x0 0x7d500000 0x9310>;
> + device_type = "pci";
> + #address-cells = <3>;
> + #size-cells = <2>;
> + #interrupt-cells = <1>;
> + interrupts = <GIC_SPI 148 IRQ_TYPE_LEVEL_HIGH>,
> + <GIC_SPI 148 IRQ_TYPE_LEVEL_HIGH>;
> + interrupt-names = "pcie", "msi";
> + interrupt-map-mask = <0x0 0x0 0x0 0x7>;
> + interrupt-map = <0 0 0 1 &gicv2 GIC_SPI 143 IRQ_TYPE_LEVEL_HIGH>;
> + msi-parent = <&pcie0>;
> + msi-controller;
> + ranges = <0x02000000 0x0 0xf8000000 0x6 0x00000000 0x0 0x04000000>;
> + dma-ranges = <0x02000000 0x0 0x00000000 0x0 0x00000000 0x0 0x80000000>;
> + brcm,enable-ssc;
> + };
> + };
> --
> 2.24.0
>
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply [flat|nested] 71+ messages in thread
* Re: [PATCH v4 8/8] linux/log2.h: Use roundup/dow_pow_two() on 64bit calculations
2019-12-03 11:47 ` Nicolas Saenz Julienne
(?)
(?)
@ 2019-12-03 15:53 ` Rob Herring
-1 siblings, 0 replies; 71+ messages in thread
From: Rob Herring @ 2019-12-03 15:53 UTC (permalink / raw)
To: Nicolas Saenz Julienne
Cc: Andrew Murray, Marc Zyngier, linux-kernel, Lorenzo Pieralisi,
Hanjun Guo, Sudeep Holla, Tariq Toukan, Frank Rowand,
Florian Fainelli, maintainer:BROADCOM BCM7XXX ARM ARCHITECTURE,
Eric Anholt, Stefan Wahren, Shawn Lin, Heiko Stuebner,
Christoph Hellwig, Marek Szyprowski, Robin Murphy, james.quinlan,
Matthias Brugger, Phil Elwell, Jeremy Linton, PCI,
moderated list:BROADCOM BCM2835 ARM ARCHITECTURE,
Rafael J. Wysocki, Len Brown, David S. Miller, Bjorn Helgaas,
linux-acpi,
moderated list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE, netdev,
linux-rdma, devicetree, open list:ARM/Rockchip SoC...,
Linux IOMMU
On Tue, Dec 3, 2019 at 5:48 AM Nicolas Saenz Julienne
<nsaenzjulienne@suse.de> wrote:
>
> The function now is safe to use while expecting a 64bit value. Use it
> where relevant.
What was wrong with the existing code? This is missing some context.
> Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
> ---
> drivers/acpi/arm64/iort.c | 2 +-
> drivers/net/ethernet/mellanox/mlx4/en_clock.c | 3 ++-
> drivers/of/device.c | 3 ++-
In any case,
Acked-by: Rob Herring <robh@kernel.org>
> drivers/pci/controller/cadence/pcie-cadence-ep.c | 3 ++-
> drivers/pci/controller/cadence/pcie-cadence.c | 3 ++-
> drivers/pci/controller/pcie-brcmstb.c | 3 ++-
> drivers/pci/controller/pcie-rockchip-ep.c | 5 +++--
> kernel/dma/direct.c | 2 +-
> 8 files changed, 15 insertions(+), 9 deletions(-)
^ permalink raw reply [flat|nested] 71+ messages in thread
* Re: [PATCH v4 8/8] linux/log2.h: Use roundup/dow_pow_two() on 64bit calculations
@ 2019-12-03 15:53 ` Rob Herring
0 siblings, 0 replies; 71+ messages in thread
From: Rob Herring @ 2019-12-03 15:53 UTC (permalink / raw)
To: Nicolas Saenz Julienne
Cc: Andrew Murray, Marc Zyngier, linux-kernel, Lorenzo Pieralisi,
Hanjun Guo, Sudeep Holla, Tariq Toukan, Frank Rowand,
Florian Fainelli, maintainer:BROADCOM BCM7XXX ARM ARCHITECTURE,
Eric Anholt, Stefan Wahren, Shawn Lin, Heiko Stuebner,
Christoph Hellwig, Marek Szyprowski, Robin Murphy, james.quinlan,
Matthias
On Tue, Dec 3, 2019 at 5:48 AM Nicolas Saenz Julienne
<nsaenzjulienne@suse.de> wrote:
>
> The function now is safe to use while expecting a 64bit value. Use it
> where relevant.
What was wrong with the existing code? This is missing some context.
> Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
> ---
> drivers/acpi/arm64/iort.c | 2 +-
> drivers/net/ethernet/mellanox/mlx4/en_clock.c | 3 ++-
> drivers/of/device.c | 3 ++-
In any case,
Acked-by: Rob Herring <robh@kernel.org>
> drivers/pci/controller/cadence/pcie-cadence-ep.c | 3 ++-
> drivers/pci/controller/cadence/pcie-cadence.c | 3 ++-
> drivers/pci/controller/pcie-brcmstb.c | 3 ++-
> drivers/pci/controller/pcie-rockchip-ep.c | 5 +++--
> kernel/dma/direct.c | 2 +-
> 8 files changed, 15 insertions(+), 9 deletions(-)
^ permalink raw reply [flat|nested] 71+ messages in thread
* Re: [PATCH v4 8/8] linux/log2.h: Use roundup/dow_pow_two() on 64bit calculations
@ 2019-12-03 15:53 ` Rob Herring
0 siblings, 0 replies; 71+ messages in thread
From: Rob Herring @ 2019-12-03 15:53 UTC (permalink / raw)
To: Nicolas Saenz Julienne
Cc: Heiko Stuebner, PCI, Shawn Lin, Eric Anholt, Hanjun Guo,
Frank Rowand, Christoph Hellwig, open list:ARM/Rockchip SoC...,
linux-rdma, Marc Zyngier, Phil Elwell, linux-acpi,
maintainer:BROADCOM BCM7XXX ARM ARCHITECTURE, Len Brown,
devicetree, Florian Fainelli,
moderated list:BROADCOM BCM2835 ARM ARCHITECTURE, Bjorn Helgaas,
moderated list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE,
Matthias Brugger, netdev, Rafael J. Wysocki, linux-kernel,
Jeremy Linton, Linux IOMMU, Stefan Wahren, james.quinlan,
Sudeep Holla, Robin Murphy, David S. Miller, Tariq Toukan
On Tue, Dec 3, 2019 at 5:48 AM Nicolas Saenz Julienne
<nsaenzjulienne@suse.de> wrote:
>
> The function now is safe to use while expecting a 64bit value. Use it
> where relevant.
What was wrong with the existing code? This is missing some context.
> Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
> ---
> drivers/acpi/arm64/iort.c | 2 +-
> drivers/net/ethernet/mellanox/mlx4/en_clock.c | 3 ++-
> drivers/of/device.c | 3 ++-
In any case,
Acked-by: Rob Herring <robh@kernel.org>
> drivers/pci/controller/cadence/pcie-cadence-ep.c | 3 ++-
> drivers/pci/controller/cadence/pcie-cadence.c | 3 ++-
> drivers/pci/controller/pcie-brcmstb.c | 3 ++-
> drivers/pci/controller/pcie-rockchip-ep.c | 5 +++--
> kernel/dma/direct.c | 2 +-
> 8 files changed, 15 insertions(+), 9 deletions(-)
_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu
^ permalink raw reply [flat|nested] 71+ messages in thread
* Re: [PATCH v4 8/8] linux/log2.h: Use roundup/dow_pow_two() on 64bit calculations
@ 2019-12-03 15:53 ` Rob Herring
0 siblings, 0 replies; 71+ messages in thread
From: Rob Herring @ 2019-12-03 15:53 UTC (permalink / raw)
To: Nicolas Saenz Julienne
Cc: Heiko Stuebner, PCI, Shawn Lin, Eric Anholt, Hanjun Guo,
Frank Rowand, Christoph Hellwig, Marek Szyprowski,
Lorenzo Pieralisi, open list:ARM/Rockchip SoC...,
linux-rdma, Marc Zyngier, Phil Elwell, linux-acpi,
maintainer:BROADCOM BCM7XXX ARM ARCHITECTURE, Len Brown,
devicetree, Florian Fainelli,
moderated list:BROADCOM BCM2835 ARM ARCHITECTURE, Bjorn Helgaas,
moderated list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE,
Matthias Brugger, netdev, Rafael J. Wysocki, linux-kernel,
Jeremy Linton, Linux IOMMU, Stefan Wahren, james.quinlan,
Sudeep Holla, Andrew Murray, Robin Murphy, David S. Miller,
Tariq Toukan
On Tue, Dec 3, 2019 at 5:48 AM Nicolas Saenz Julienne
<nsaenzjulienne@suse.de> wrote:
>
> The function now is safe to use while expecting a 64bit value. Use it
> where relevant.
What was wrong with the existing code? This is missing some context.
> Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
> ---
> drivers/acpi/arm64/iort.c | 2 +-
> drivers/net/ethernet/mellanox/mlx4/en_clock.c | 3 ++-
> drivers/of/device.c | 3 ++-
In any case,
Acked-by: Rob Herring <robh@kernel.org>
> drivers/pci/controller/cadence/pcie-cadence-ep.c | 3 ++-
> drivers/pci/controller/cadence/pcie-cadence.c | 3 ++-
> drivers/pci/controller/pcie-brcmstb.c | 3 ++-
> drivers/pci/controller/pcie-rockchip-ep.c | 5 +++--
> kernel/dma/direct.c | 2 +-
> 8 files changed, 15 insertions(+), 9 deletions(-)
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply [flat|nested] 71+ messages in thread
* Re: [PATCH v4 8/8] linux/log2.h: Use roundup/dow_pow_two() on 64bit calculations
2019-12-03 15:53 ` Rob Herring
(?)
(?)
@ 2019-12-03 16:06 ` Nicolas Saenz Julienne
-1 siblings, 0 replies; 71+ messages in thread
From: Nicolas Saenz Julienne @ 2019-12-03 16:06 UTC (permalink / raw)
To: Rob Herring
Cc: Andrew Murray, Marc Zyngier, linux-kernel, Lorenzo Pieralisi,
Hanjun Guo, Sudeep Holla, Tariq Toukan, Frank Rowand,
Florian Fainelli, maintainer:BROADCOM BCM7XXX ARM ARCHITECTURE,
Eric Anholt, Stefan Wahren, Shawn Lin, Heiko Stuebner,
Christoph Hellwig, Marek Szyprowski, Robin Murphy, james.quinlan,
Matthias Brugger, Phil Elwell, Jeremy Linton, PCI,
moderated list:BROADCOM BCM2835 ARM ARCHITECTURE,
Rafael J. Wysocki, Len Brown, David S. Miller, Bjorn Helgaas,
linux-acpi,
moderated list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE, netdev,
linux-rdma, devicetree, open list:ARM/Rockchip SoC...,
Linux IOMMU
[-- Attachment #1: Type: text/plain, Size: 1083 bytes --]
Hi Rob,
On Tue, 2019-12-03 at 09:53 -0600, Rob Herring wrote:
> On Tue, Dec 3, 2019 at 5:48 AM Nicolas Saenz Julienne
> <nsaenzjulienne@suse.de> wrote:
> > The function now is safe to use while expecting a 64bit value. Use it
> > where relevant.
>
> What was wrong with the existing code? This is missing some context.
You're right, I'll update it.
For most of files changed the benefit here is factoring out a common pattern
using the standard function roundup/down_pow_two() which now provides correct
64bit results.
As for of/device.c and arm64/iort.c it's more of a readability enhancement. I
consider it's easier to understand than the current calculation as it abstracts
the math.
> > Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
> > ---
> > drivers/acpi/arm64/iort.c | 2 +-
> > drivers/net/ethernet/mellanox/mlx4/en_clock.c | 3 ++-
> > drivers/of/device.c | 3 ++-
>
> In any case,
>
> Acked-by: Rob Herring <robh@kernel.org>
>
Thanks!
Regards,
Nicolas
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^ permalink raw reply [flat|nested] 71+ messages in thread
* Re: [PATCH v4 8/8] linux/log2.h: Use roundup/dow_pow_two() on 64bit calculations
@ 2019-12-03 16:06 ` Nicolas Saenz Julienne
0 siblings, 0 replies; 71+ messages in thread
From: Nicolas Saenz Julienne @ 2019-12-03 16:06 UTC (permalink / raw)
To: Rob Herring
Cc: Andrew Murray, Marc Zyngier, linux-kernel, Lorenzo Pieralisi,
Hanjun Guo, Sudeep Holla, Tariq Toukan, Frank Rowand,
Florian Fainelli, maintainer:BROADCOM BCM7XXX ARM ARCHITECTURE,
Eric Anholt, Stefan Wahren, Shawn Lin, Heiko Stuebner,
Christoph Hellwig, Marek Szyprowski, Robin Murphy, james.quinlan,
Matthias
[-- Attachment #1: Type: text/plain, Size: 1083 bytes --]
Hi Rob,
On Tue, 2019-12-03 at 09:53 -0600, Rob Herring wrote:
> On Tue, Dec 3, 2019 at 5:48 AM Nicolas Saenz Julienne
> <nsaenzjulienne@suse.de> wrote:
> > The function now is safe to use while expecting a 64bit value. Use it
> > where relevant.
>
> What was wrong with the existing code? This is missing some context.
You're right, I'll update it.
For most of files changed the benefit here is factoring out a common pattern
using the standard function roundup/down_pow_two() which now provides correct
64bit results.
As for of/device.c and arm64/iort.c it's more of a readability enhancement. I
consider it's easier to understand than the current calculation as it abstracts
the math.
> > Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
> > ---
> > drivers/acpi/arm64/iort.c | 2 +-
> > drivers/net/ethernet/mellanox/mlx4/en_clock.c | 3 ++-
> > drivers/of/device.c | 3 ++-
>
> In any case,
>
> Acked-by: Rob Herring <robh@kernel.org>
>
Thanks!
Regards,
Nicolas
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^ permalink raw reply [flat|nested] 71+ messages in thread
* Re: [PATCH v4 8/8] linux/log2.h: Use roundup/dow_pow_two() on 64bit calculations
@ 2019-12-03 16:06 ` Nicolas Saenz Julienne
0 siblings, 0 replies; 71+ messages in thread
From: Nicolas Saenz Julienne @ 2019-12-03 16:06 UTC (permalink / raw)
To: Rob Herring
Cc: Heiko Stuebner, PCI, Shawn Lin, Eric Anholt, Hanjun Guo,
Frank Rowand, Christoph Hellwig, open list:ARM/Rockchip SoC...,
linux-rdma, Marc Zyngier, Phil Elwell, linux-acpi,
maintainer:BROADCOM BCM7XXX ARM ARCHITECTURE, Len Brown,
devicetree, Florian Fainelli,
moderated list:BROADCOM BCM2835 ARM ARCHITECTURE, Bjorn Helgaas,
moderated list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE,
Matthias Brugger, netdev, Rafael J. Wysocki, linux-kernel,
Jeremy Linton, Linux IOMMU, Stefan Wahren, james.quinlan,
Sudeep Holla, Robin Murphy, David S. Miller, Tariq Toukan
[-- Attachment #1.1: Type: text/plain, Size: 1083 bytes --]
Hi Rob,
On Tue, 2019-12-03 at 09:53 -0600, Rob Herring wrote:
> On Tue, Dec 3, 2019 at 5:48 AM Nicolas Saenz Julienne
> <nsaenzjulienne@suse.de> wrote:
> > The function now is safe to use while expecting a 64bit value. Use it
> > where relevant.
>
> What was wrong with the existing code? This is missing some context.
You're right, I'll update it.
For most of files changed the benefit here is factoring out a common pattern
using the standard function roundup/down_pow_two() which now provides correct
64bit results.
As for of/device.c and arm64/iort.c it's more of a readability enhancement. I
consider it's easier to understand than the current calculation as it abstracts
the math.
> > Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
> > ---
> > drivers/acpi/arm64/iort.c | 2 +-
> > drivers/net/ethernet/mellanox/mlx4/en_clock.c | 3 ++-
> > drivers/of/device.c | 3 ++-
>
> In any case,
>
> Acked-by: Rob Herring <robh@kernel.org>
>
Thanks!
Regards,
Nicolas
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_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu
^ permalink raw reply [flat|nested] 71+ messages in thread
* Re: [PATCH v4 8/8] linux/log2.h: Use roundup/dow_pow_two() on 64bit calculations
@ 2019-12-03 16:06 ` Nicolas Saenz Julienne
0 siblings, 0 replies; 71+ messages in thread
From: Nicolas Saenz Julienne @ 2019-12-03 16:06 UTC (permalink / raw)
To: Rob Herring
Cc: Heiko Stuebner, PCI, Shawn Lin, Eric Anholt, Hanjun Guo,
Frank Rowand, Christoph Hellwig, Marek Szyprowski,
Lorenzo Pieralisi, open list:ARM/Rockchip SoC...,
linux-rdma, Marc Zyngier, Phil Elwell, linux-acpi,
maintainer:BROADCOM BCM7XXX ARM ARCHITECTURE, Len Brown,
devicetree, Florian Fainelli,
moderated list:BROADCOM BCM2835 ARM ARCHITECTURE, Bjorn Helgaas,
moderated list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE,
Matthias Brugger, netdev, Rafael J. Wysocki, linux-kernel,
Jeremy Linton, Linux IOMMU, Stefan Wahren, james.quinlan,
Sudeep Holla, Andrew Murray, Robin Murphy, David S. Miller,
Tariq Toukan
[-- Attachment #1.1: Type: text/plain, Size: 1083 bytes --]
Hi Rob,
On Tue, 2019-12-03 at 09:53 -0600, Rob Herring wrote:
> On Tue, Dec 3, 2019 at 5:48 AM Nicolas Saenz Julienne
> <nsaenzjulienne@suse.de> wrote:
> > The function now is safe to use while expecting a 64bit value. Use it
> > where relevant.
>
> What was wrong with the existing code? This is missing some context.
You're right, I'll update it.
For most of files changed the benefit here is factoring out a common pattern
using the standard function roundup/down_pow_two() which now provides correct
64bit results.
As for of/device.c and arm64/iort.c it's more of a readability enhancement. I
consider it's easier to understand than the current calculation as it abstracts
the math.
> > Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
> > ---
> > drivers/acpi/arm64/iort.c | 2 +-
> > drivers/net/ethernet/mellanox/mlx4/en_clock.c | 3 ++-
> > drivers/of/device.c | 3 ++-
>
> In any case,
>
> Acked-by: Rob Herring <robh@kernel.org>
>
Thanks!
Regards,
Nicolas
[-- Attachment #1.2: This is a digitally signed message part --]
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[-- Attachment #2: Type: text/plain, Size: 176 bytes --]
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply [flat|nested] 71+ messages in thread
* Re: [PATCH v4 7/8] linux/log2.h: Fix 64bit calculations in roundup/down_pow_two()
2019-12-03 11:47 ` Nicolas Saenz Julienne
(?)
(?)
@ 2019-12-03 16:39 ` Chuck Lever
-1 siblings, 0 replies; 71+ messages in thread
From: Chuck Lever @ 2019-12-03 16:39 UTC (permalink / raw)
To: Nicolas Saenz Julienne
Cc: andrew.murray, maz, Linux Kernel Mailing List, Michael Turquette,
Stephen Boyd, Emilio López, Maxime Ripard, Chen-Yu Tsai,
Mike Marciniszyn, Dennis Dalessandro, Yishai Hadas, Moni Shoua,
David Woodhouse, Lu Baolu, Joerg Roedel, Tom Lendacky,
Mirko Lindner, Stephen Hemminger, Jiri Pirko,
Solarflare linux maintainers, Edward Cree, Martin Habets,
Bjorn Helgaas, Eric W. Biederman, Thomas Graf, Herbert Xu,
james.quinlan, mbrugger, f.fainelli, phil, wahrenst,
jeremy.linton, linux-pci, linux-rpi-kernel, Robin Murphy,
Doug Ledford, Jason Gunthorpe, David S. Miller, Trond Myklebust,
Anna Schumaker, Bruce Fields, linux-clk, linux-arm-kernel,
linux-rdma, iommu, netdev, kexec, Linux NFS Mailing List
> On Dec 3, 2019, at 6:47 AM, Nicolas Saenz Julienne <nsaenzjulienne@suse.de> wrote:
>
> Some users need to make sure their rounding function accepts and returns
> 64bit long variables regardless of the architecture. Sadly
> roundup/rounddown_pow_two() takes and returns unsigned longs. It turns
> out ilog2() already handles 32/64bit calculations properly, and being
> the building block to the round functions we can rework them as a
> wrapper around it.
>
> Suggested-by: Robin Murphy <robin.murphy@arm.con>
> Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
> ---
> drivers/clk/clk-divider.c | 8 ++--
> drivers/clk/sunxi/clk-sunxi.c | 2 +-
> drivers/infiniband/hw/hfi1/chip.c | 4 +-
> drivers/infiniband/hw/hfi1/init.c | 4 +-
> drivers/infiniband/hw/mlx4/srq.c | 2 +-
> drivers/infiniband/hw/mthca/mthca_srq.c | 2 +-
> drivers/infiniband/sw/rxe/rxe_qp.c | 4 +-
> drivers/iommu/intel-iommu.c | 4 +-
> drivers/iommu/intel-svm.c | 4 +-
> drivers/iommu/intel_irq_remapping.c | 2 +-
> drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c | 4 +-
> drivers/net/ethernet/marvell/sky2.c | 2 +-
> drivers/net/ethernet/rocker/rocker_hw.h | 4 +-
> drivers/net/ethernet/sfc/ef10.c | 2 +-
> drivers/net/ethernet/sfc/efx.h | 2 +-
> drivers/net/ethernet/sfc/falcon/efx.h | 2 +-
> drivers/pci/msi.c | 2 +-
> include/linux/log2.h | 44 +++++---------------
> kernel/kexec_core.c | 3 +-
> lib/rhashtable.c | 2 +-
> net/sunrpc/xprtrdma/verbs.c | 2 +-
> 21 files changed, 41 insertions(+), 64 deletions(-)
>
> diff --git a/drivers/clk/clk-divider.c b/drivers/clk/clk-divider.c
> index 098b2b01f0af..ba947e4c8193 100644
> --- a/drivers/clk/clk-divider.c
> +++ b/drivers/clk/clk-divider.c
> @@ -222,7 +222,7 @@ static int _div_round_up(const struct clk_div_table *table,
> int div = DIV_ROUND_UP_ULL((u64)parent_rate, rate);
>
> if (flags & CLK_DIVIDER_POWER_OF_TWO)
> - div = __roundup_pow_of_two(div);
> + div = roundup_pow_of_two(div);
> if (table)
> div = _round_up_table(table, div);
>
> @@ -240,8 +240,8 @@ static int _div_round_closest(const struct clk_div_table *table,
> down = parent_rate / rate;
>
> if (flags & CLK_DIVIDER_POWER_OF_TWO) {
> - up = __roundup_pow_of_two(up);
> - down = __rounddown_pow_of_two(down);
> + up = roundup_pow_of_two(up);
> + down = rounddown_pow_of_two(down);
> } else if (table) {
> up = _round_up_table(table, up);
> down = _round_down_table(table, down);
> @@ -278,7 +278,7 @@ static int _next_div(const struct clk_div_table *table, int div,
> div++;
>
> if (flags & CLK_DIVIDER_POWER_OF_TWO)
> - return __roundup_pow_of_two(div);
> + return roundup_pow_of_two(div);
> if (table)
> return _round_up_table(table, div);
>
> diff --git a/drivers/clk/sunxi/clk-sunxi.c b/drivers/clk/sunxi/clk-sunxi.c
> index 27201fd26e44..faec99dc09c0 100644
> --- a/drivers/clk/sunxi/clk-sunxi.c
> +++ b/drivers/clk/sunxi/clk-sunxi.c
> @@ -311,7 +311,7 @@ static void sun6i_get_ahb1_factors(struct factors_request *req)
>
> calcm = DIV_ROUND_UP(div, 1 << calcp);
> } else {
> - calcp = __roundup_pow_of_two(div);
> + calcp = roundup_pow_of_two(div);
> calcp = calcp > 3 ? 3 : calcp;
> }
>
> diff --git a/drivers/infiniband/hw/hfi1/chip.c b/drivers/infiniband/hw/hfi1/chip.c
> index 9b1fb84a3d45..96b1d343c32f 100644
> --- a/drivers/infiniband/hw/hfi1/chip.c
> +++ b/drivers/infiniband/hw/hfi1/chip.c
> @@ -14199,10 +14199,10 @@ static int qos_rmt_entries(struct hfi1_devdata *dd, unsigned int *mp,
> max_by_vl = krcvqs[i];
> if (max_by_vl > 32)
> goto no_qos;
> - m = ilog2(__roundup_pow_of_two(max_by_vl));
> + m = ilog2(roundup_pow_of_two(max_by_vl));
>
> /* determine bits for vl */
> - n = ilog2(__roundup_pow_of_two(num_vls));
> + n = ilog2(roundup_pow_of_two(num_vls));
>
> /* reject if too much is used */
> if ((m + n) > 7)
> diff --git a/drivers/infiniband/hw/hfi1/init.c b/drivers/infiniband/hw/hfi1/init.c
> index 26b792bb1027..838c789c7cce 100644
> --- a/drivers/infiniband/hw/hfi1/init.c
> +++ b/drivers/infiniband/hw/hfi1/init.c
> @@ -467,7 +467,7 @@ int hfi1_create_ctxtdata(struct hfi1_pportdata *ppd, int numa,
> * MTU supported.
> */
> if (rcd->egrbufs.size < hfi1_max_mtu) {
> - rcd->egrbufs.size = __roundup_pow_of_two(hfi1_max_mtu);
> + rcd->egrbufs.size = roundup_pow_of_two(hfi1_max_mtu);
> hfi1_cdbg(PROC,
> "ctxt%u: eager bufs size too small. Adjusting to %u\n",
> rcd->ctxt, rcd->egrbufs.size);
> @@ -1959,7 +1959,7 @@ int hfi1_setup_eagerbufs(struct hfi1_ctxtdata *rcd)
> * to satisfy the "multiple of 8 RcvArray entries" requirement.
> */
> if (rcd->egrbufs.size <= (1 << 20))
> - rcd->egrbufs.rcvtid_size = max((unsigned long)round_mtu,
> + rcd->egrbufs.rcvtid_size = max((unsigned long long)round_mtu,
> rounddown_pow_of_two(rcd->egrbufs.size / 8));
>
> while (alloced_bytes < rcd->egrbufs.size &&
> diff --git a/drivers/infiniband/hw/mlx4/srq.c b/drivers/infiniband/hw/mlx4/srq.c
> index 8dcf6e3d9ae2..7e685600a7b3 100644
> --- a/drivers/infiniband/hw/mlx4/srq.c
> +++ b/drivers/infiniband/hw/mlx4/srq.c
> @@ -96,7 +96,7 @@ int mlx4_ib_create_srq(struct ib_srq *ib_srq,
> srq->msrq.max = roundup_pow_of_two(init_attr->attr.max_wr + 1);
> srq->msrq.max_gs = init_attr->attr.max_sge;
>
> - desc_size = max(32UL,
> + desc_size = max(32ULL,
> roundup_pow_of_two(sizeof (struct mlx4_wqe_srq_next_seg) +
> srq->msrq.max_gs *
> sizeof (struct mlx4_wqe_data_seg)));
> diff --git a/drivers/infiniband/hw/mthca/mthca_srq.c b/drivers/infiniband/hw/mthca/mthca_srq.c
> index a85935ccce88..0c2e14b4142a 100644
> --- a/drivers/infiniband/hw/mthca/mthca_srq.c
> +++ b/drivers/infiniband/hw/mthca/mthca_srq.c
> @@ -225,7 +225,7 @@ int mthca_alloc_srq(struct mthca_dev *dev, struct mthca_pd *pd,
> else
> srq->max = srq->max + 1;
>
> - ds = max(64UL,
> + ds = max(64ULL,
> roundup_pow_of_two(sizeof (struct mthca_next_seg) +
> srq->max_gs * sizeof (struct mthca_data_seg)));
>
> diff --git a/drivers/infiniband/sw/rxe/rxe_qp.c b/drivers/infiniband/sw/rxe/rxe_qp.c
> index e2c6d1cedf41..040b707b0877 100644
> --- a/drivers/infiniband/sw/rxe/rxe_qp.c
> +++ b/drivers/infiniband/sw/rxe/rxe_qp.c
> @@ -592,7 +592,7 @@ int rxe_qp_from_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask,
> int err;
>
> if (mask & IB_QP_MAX_QP_RD_ATOMIC) {
> - int max_rd_atomic = __roundup_pow_of_two(attr->max_rd_atomic);
> + int max_rd_atomic = roundup_pow_of_two(attr->max_rd_atomic);
>
> qp->attr.max_rd_atomic = max_rd_atomic;
> atomic_set(&qp->req.rd_atomic, max_rd_atomic);
> @@ -600,7 +600,7 @@ int rxe_qp_from_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask,
>
> if (mask & IB_QP_MAX_DEST_RD_ATOMIC) {
> int max_dest_rd_atomic =
> - __roundup_pow_of_two(attr->max_dest_rd_atomic);
> + roundup_pow_of_two(attr->max_dest_rd_atomic);
>
> qp->attr.max_dest_rd_atomic = max_dest_rd_atomic;
>
> diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
> index 0c8d81f56a30..ce7c900bd666 100644
> --- a/drivers/iommu/intel-iommu.c
> +++ b/drivers/iommu/intel-iommu.c
> @@ -1488,7 +1488,7 @@ static void iommu_flush_iotlb_psi(struct intel_iommu *iommu,
> unsigned long pfn, unsigned int pages,
> int ih, int map)
> {
> - unsigned int mask = ilog2(__roundup_pow_of_two(pages));
> + unsigned int mask = ilog2(roundup_pow_of_two(pages));
> uint64_t addr = (uint64_t)pfn << VTD_PAGE_SHIFT;
> u16 did = domain->iommu_did[iommu->seq_id];
>
> @@ -3390,7 +3390,7 @@ static unsigned long intel_alloc_iova(struct device *dev,
> /* Restrict dma_mask to the width that the iommu can handle */
> dma_mask = min_t(uint64_t, DOMAIN_MAX_ADDR(domain->gaw), dma_mask);
> /* Ensure we reserve the whole size-aligned region */
> - nrpages = __roundup_pow_of_two(nrpages);
> + nrpages = roundup_pow_of_two(nrpages);
>
> if (!dmar_forcedac && dma_mask > DMA_BIT_MASK(32)) {
> /*
> diff --git a/drivers/iommu/intel-svm.c b/drivers/iommu/intel-svm.c
> index 9b159132405d..602caca3cd1a 100644
> --- a/drivers/iommu/intel-svm.c
> +++ b/drivers/iommu/intel-svm.c
> @@ -115,7 +115,7 @@ static void intel_flush_svm_range_dev (struct intel_svm *svm, struct intel_svm_d
> QI_EIOTLB_TYPE;
> desc.qw1 = 0;
> } else {
> - int mask = ilog2(__roundup_pow_of_two(pages));
> + int mask = ilog2(roundup_pow_of_two(pages));
>
> desc.qw0 = QI_EIOTLB_PASID(svm->pasid) |
> QI_EIOTLB_DID(sdev->did) |
> @@ -142,7 +142,7 @@ static void intel_flush_svm_range_dev (struct intel_svm *svm, struct intel_svm_d
> * for example, an "address" value of 0x12345f000 will
> * flush from 0x123440000 to 0x12347ffff (256KiB). */
> unsigned long last = address + ((unsigned long)(pages - 1) << VTD_PAGE_SHIFT);
> - unsigned long mask = __rounddown_pow_of_two(address ^ last);
> + unsigned long mask = rounddown_pow_of_two(address ^ last);
>
> desc.qw1 = QI_DEV_EIOTLB_ADDR((address & ~mask) |
> (mask - 1)) | QI_DEV_EIOTLB_SIZE;
> diff --git a/drivers/iommu/intel_irq_remapping.c b/drivers/iommu/intel_irq_remapping.c
> index 81e43c1df7ec..935657b2c661 100644
> --- a/drivers/iommu/intel_irq_remapping.c
> +++ b/drivers/iommu/intel_irq_remapping.c
> @@ -113,7 +113,7 @@ static int alloc_irte(struct intel_iommu *iommu,
> return -1;
>
> if (count > 1) {
> - count = __roundup_pow_of_two(count);
> + count = roundup_pow_of_two(count);
> mask = ilog2(count);
> }
>
> diff --git a/drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c b/drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c
> index 6a757dadb5f1..fd5b12c23eaa 100644
> --- a/drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c
> +++ b/drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c
> @@ -680,13 +680,13 @@ static int xgbe_set_ringparam(struct net_device *netdev,
> return -EINVAL;
> }
>
> - rx = __rounddown_pow_of_two(ringparam->rx_pending);
> + rx = rounddown_pow_of_two(ringparam->rx_pending);
> if (rx != ringparam->rx_pending)
> netdev_notice(netdev,
> "rx ring parameter rounded to power of two: %u\n",
> rx);
>
> - tx = __rounddown_pow_of_two(ringparam->tx_pending);
> + tx = rounddown_pow_of_two(ringparam->tx_pending);
> if (tx != ringparam->tx_pending)
> netdev_notice(netdev,
> "tx ring parameter rounded to power of two: %u\n",
> diff --git a/drivers/net/ethernet/marvell/sky2.c b/drivers/net/ethernet/marvell/sky2.c
> index 5f56ee83e3b1..cc3a03b4a611 100644
> --- a/drivers/net/ethernet/marvell/sky2.c
> +++ b/drivers/net/ethernet/marvell/sky2.c
> @@ -4139,7 +4139,7 @@ static int sky2_set_coalesce(struct net_device *dev,
> */
> static unsigned long roundup_ring_size(unsigned long pending)
> {
> - return max(128ul, roundup_pow_of_two(pending+1));
> + return max(128ull, roundup_pow_of_two(pending+1));
> }
>
> static void sky2_get_ringparam(struct net_device *dev,
> diff --git a/drivers/net/ethernet/rocker/rocker_hw.h b/drivers/net/ethernet/rocker/rocker_hw.h
> index 59f1f8b690d2..d8de15509e2c 100644
> --- a/drivers/net/ethernet/rocker/rocker_hw.h
> +++ b/drivers/net/ethernet/rocker/rocker_hw.h
> @@ -88,8 +88,8 @@ enum rocker_dma_type {
> };
>
> /* Rocker DMA ring size limits and default sizes */
> -#define ROCKER_DMA_SIZE_MIN 2ul
> -#define ROCKER_DMA_SIZE_MAX 65536ul
> +#define ROCKER_DMA_SIZE_MIN 2ull
> +#define ROCKER_DMA_SIZE_MAX 65536ull
> #define ROCKER_DMA_CMD_DEFAULT_SIZE 32ul
> #define ROCKER_DMA_EVENT_DEFAULT_SIZE 32ul
> #define ROCKER_DMA_TX_DEFAULT_SIZE 64ul
> diff --git a/drivers/net/ethernet/sfc/ef10.c b/drivers/net/ethernet/sfc/ef10.c
> index 4d9bbccc6f89..4f4d9a5b3b75 100644
> --- a/drivers/net/ethernet/sfc/ef10.c
> +++ b/drivers/net/ethernet/sfc/ef10.c
> @@ -27,7 +27,7 @@ enum {
> };
> /* The maximum size of a shared RSS context */
> /* TODO: this should really be from the mcdi protocol export */
> -#define EFX_EF10_MAX_SHARED_RSS_CONTEXT_SIZE 64UL
> +#define EFX_EF10_MAX_SHARED_RSS_CONTEXT_SIZE 64ULL
>
> /* The filter table(s) are managed by firmware and we have write-only
> * access. When removing filters we must identify them to the
> diff --git a/drivers/net/ethernet/sfc/efx.h b/drivers/net/ethernet/sfc/efx.h
> index 2dd8d5002315..fea2add5860e 100644
> --- a/drivers/net/ethernet/sfc/efx.h
> +++ b/drivers/net/ethernet/sfc/efx.h
> @@ -52,7 +52,7 @@ void efx_schedule_slow_fill(struct efx_rx_queue *rx_queue);
>
> #define EFX_MAX_DMAQ_SIZE 4096UL
> #define EFX_DEFAULT_DMAQ_SIZE 1024UL
> -#define EFX_MIN_DMAQ_SIZE 512UL
> +#define EFX_MIN_DMAQ_SIZE 512ULL
>
> #define EFX_MAX_EVQ_SIZE 16384UL
> #define EFX_MIN_EVQ_SIZE 512UL
> diff --git a/drivers/net/ethernet/sfc/falcon/efx.h b/drivers/net/ethernet/sfc/falcon/efx.h
> index d3b4646545fa..0d16257156d6 100644
> --- a/drivers/net/ethernet/sfc/falcon/efx.h
> +++ b/drivers/net/ethernet/sfc/falcon/efx.h
> @@ -55,7 +55,7 @@ void ef4_schedule_slow_fill(struct ef4_rx_queue *rx_queue);
>
> #define EF4_MAX_DMAQ_SIZE 4096UL
> #define EF4_DEFAULT_DMAQ_SIZE 1024UL
> -#define EF4_MIN_DMAQ_SIZE 512UL
> +#define EF4_MIN_DMAQ_SIZE 512ULL
>
> #define EF4_MAX_EVQ_SIZE 16384UL
> #define EF4_MIN_EVQ_SIZE 512UL
> diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c
> index c7709e49f0e4..f0391e88bc42 100644
> --- a/drivers/pci/msi.c
> +++ b/drivers/pci/msi.c
> @@ -578,7 +578,7 @@ msi_setup_entry(struct pci_dev *dev, int nvec, struct irq_affinity *affd)
> entry->msi_attrib.maskbit = !!(control & PCI_MSI_FLAGS_MASKBIT);
> entry->msi_attrib.default_irq = dev->irq; /* Save IOAPIC IRQ */
> entry->msi_attrib.multi_cap = (control & PCI_MSI_FLAGS_QMASK) >> 1;
> - entry->msi_attrib.multiple = ilog2(__roundup_pow_of_two(nvec));
> + entry->msi_attrib.multiple = ilog2(roundup_pow_of_two(nvec));
>
> if (control & PCI_MSI_FLAGS_64BIT)
> entry->mask_pos = dev->msi_cap + PCI_MSI_MASK_64;
> diff --git a/include/linux/log2.h b/include/linux/log2.h
> index 83a4a3ca3e8a..53a727303dac 100644
> --- a/include/linux/log2.h
> +++ b/include/linux/log2.h
> @@ -47,26 +47,6 @@ bool is_power_of_2(unsigned long n)
> return (n != 0 && ((n & (n - 1)) == 0));
> }
>
> -/**
> - * __roundup_pow_of_two() - round up to nearest power of two
> - * @n: value to round up
> - */
> -static inline __attribute__((const))
> -unsigned long __roundup_pow_of_two(unsigned long n)
> -{
> - return 1UL << fls_long(n - 1);
> -}
> -
> -/**
> - * __rounddown_pow_of_two() - round down to nearest power of two
> - * @n: value to round down
> - */
> -static inline __attribute__((const))
> -unsigned long __rounddown_pow_of_two(unsigned long n)
> -{
> - return 1UL << (fls_long(n) - 1);
> -}
> -
> /**
> * const_ilog2 - log base 2 of 32-bit or a 64-bit constant unsigned value
> * @n: parameter
> @@ -170,14 +150,11 @@ unsigned long __rounddown_pow_of_two(unsigned long n)
> * - the result is undefined when n == 0
> * - this can be used to initialise global variables from constant data
> */
> -#define roundup_pow_of_two(n) \
> -( \
> - __builtin_constant_p(n) ? ( \
> - (n == 1) ? 1 : \
> - (1UL << (ilog2((n) - 1) + 1)) \
> - ) : \
> - __roundup_pow_of_two(n) \
> - )
> +#define roundup_pow_of_two(n) \
> +( \
> + (__builtin_constant_p(n) && ((n) == 1)) ? \
> + 1 : (1ULL << (ilog2((n) - 1) + 1)) \
> +)
>
> /**
> * rounddown_pow_of_two - round the given value down to nearest power of two
> @@ -187,12 +164,11 @@ unsigned long __rounddown_pow_of_two(unsigned long n)
> * - the result is undefined when n == 0
> * - this can be used to initialise global variables from constant data
> */
> -#define rounddown_pow_of_two(n) \
> -( \
> - __builtin_constant_p(n) ? ( \
> - (1UL << ilog2(n))) : \
> - __rounddown_pow_of_two(n) \
> - )
> +#define rounddown_pow_of_two(n) \
> +( \
> + (__builtin_constant_p(n) && ((n) == 1)) ? \
> + 1 : (1ULL << (ilog2(n))) \
> +)
>
> static inline __attribute_const__
> int __order_base_2(unsigned long n)
> diff --git a/kernel/kexec_core.c b/kernel/kexec_core.c
> index 15d70a90b50d..bb9efc6944a4 100644
> --- a/kernel/kexec_core.c
> +++ b/kernel/kexec_core.c
> @@ -1094,7 +1094,8 @@ static int __init crash_notes_memory_init(void)
> * crash_notes is allocated inside one physical page.
> */
> size = sizeof(note_buf_t);
> - align = min(roundup_pow_of_two(sizeof(note_buf_t)), PAGE_SIZE);
> + align = min(roundup_pow_of_two(sizeof(note_buf_t)),
> + (unsigned long long)PAGE_SIZE);
>
> /*
> * Break compile if size is bigger than PAGE_SIZE since crash_notes
> diff --git a/lib/rhashtable.c b/lib/rhashtable.c
> index bdb7e4cadf05..70908678c7a8 100644
> --- a/lib/rhashtable.c
> +++ b/lib/rhashtable.c
> @@ -950,7 +950,7 @@ static size_t rounded_hashtable_size(const struct rhashtable_params *params)
>
> if (params->nelem_hint)
> retsize = max(roundup_pow_of_two(params->nelem_hint * 4 / 3),
> - (unsigned long)params->min_size);
> + (unsigned long long)params->min_size);
> else
> retsize = max(HASH_DEFAULT_SIZE,
> (unsigned long)params->min_size);
> diff --git a/net/sunrpc/xprtrdma/verbs.c b/net/sunrpc/xprtrdma/verbs.c
> index 77c7dd7f05e8..78fb8ccabddd 100644
> --- a/net/sunrpc/xprtrdma/verbs.c
> +++ b/net/sunrpc/xprtrdma/verbs.c
> @@ -1015,7 +1015,7 @@ struct rpcrdma_req *rpcrdma_req_create(struct rpcrdma_xprt *r_xprt, size_t size,
> maxhdrsize = rpcrdma_fixed_maxsz + 3 +
> r_xprt->rx_ia.ri_max_segs * rpcrdma_readchunk_maxsz;
> maxhdrsize *= sizeof(__be32);
> - rb = rpcrdma_regbuf_alloc(__roundup_pow_of_two(maxhdrsize),
> + rb = rpcrdma_regbuf_alloc(roundup_pow_of_two(maxhdrsize),
> DMA_TO_DEVICE, flags);
> if (!rb)
> goto out2;
For the xprtrdma chunk:
Reviewed-by: Chuck Lever <chuck.lever@oracle.com>
--
Chuck Lever
^ permalink raw reply [flat|nested] 71+ messages in thread
* Re: [PATCH v4 7/8] linux/log2.h: Fix 64bit calculations in roundup/down_pow_two()
@ 2019-12-03 16:39 ` Chuck Lever
0 siblings, 0 replies; 71+ messages in thread
From: Chuck Lever @ 2019-12-03 16:39 UTC (permalink / raw)
To: Nicolas Saenz Julienne
Cc: linux-pci, Michael Turquette, Bruce Fields,
Linux NFS Mailing List, Edward Cree, linux-clk, f.fainelli,
Herbert Xu, Emilio López, maz, phil, Doug Ledford,
Jason Gunthorpe, Chen-Yu Tsai, Martin Habets, wahrenst,
Tom Lendacky, Jiri Pirko, Solarflare linux maintainers,
Maxime Ripard, linux-rpi-kernel, Anna Schumaker, Bjorn Helgaas,
Trond Myklebust, linux-arm-kernel, Mirko Lindner,
Mike Marciniszyn, mbrugger, Stephen Boyd, netdev, Yishai Hadas,
kexec, Linux Kernel Mailing List, jeremy.linton, David S. Miller,
Stephen Hemminger, linux-rdma, iommu, Moni Shoua,
Eric W. Biederman, james.quinlan, Thomas Graf, Robin Murphy,
David Woodhouse, Dennis Dalessandro
> On Dec 3, 2019, at 6:47 AM, Nicolas Saenz Julienne <nsaenzjulienne@suse.de> wrote:
>
> Some users need to make sure their rounding function accepts and returns
> 64bit long variables regardless of the architecture. Sadly
> roundup/rounddown_pow_two() takes and returns unsigned longs. It turns
> out ilog2() already handles 32/64bit calculations properly, and being
> the building block to the round functions we can rework them as a
> wrapper around it.
>
> Suggested-by: Robin Murphy <robin.murphy@arm.con>
> Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
> ---
> drivers/clk/clk-divider.c | 8 ++--
> drivers/clk/sunxi/clk-sunxi.c | 2 +-
> drivers/infiniband/hw/hfi1/chip.c | 4 +-
> drivers/infiniband/hw/hfi1/init.c | 4 +-
> drivers/infiniband/hw/mlx4/srq.c | 2 +-
> drivers/infiniband/hw/mthca/mthca_srq.c | 2 +-
> drivers/infiniband/sw/rxe/rxe_qp.c | 4 +-
> drivers/iommu/intel-iommu.c | 4 +-
> drivers/iommu/intel-svm.c | 4 +-
> drivers/iommu/intel_irq_remapping.c | 2 +-
> drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c | 4 +-
> drivers/net/ethernet/marvell/sky2.c | 2 +-
> drivers/net/ethernet/rocker/rocker_hw.h | 4 +-
> drivers/net/ethernet/sfc/ef10.c | 2 +-
> drivers/net/ethernet/sfc/efx.h | 2 +-
> drivers/net/ethernet/sfc/falcon/efx.h | 2 +-
> drivers/pci/msi.c | 2 +-
> include/linux/log2.h | 44 +++++---------------
> kernel/kexec_core.c | 3 +-
> lib/rhashtable.c | 2 +-
> net/sunrpc/xprtrdma/verbs.c | 2 +-
> 21 files changed, 41 insertions(+), 64 deletions(-)
>
> diff --git a/drivers/clk/clk-divider.c b/drivers/clk/clk-divider.c
> index 098b2b01f0af..ba947e4c8193 100644
> --- a/drivers/clk/clk-divider.c
> +++ b/drivers/clk/clk-divider.c
> @@ -222,7 +222,7 @@ static int _div_round_up(const struct clk_div_table *table,
> int div = DIV_ROUND_UP_ULL((u64)parent_rate, rate);
>
> if (flags & CLK_DIVIDER_POWER_OF_TWO)
> - div = __roundup_pow_of_two(div);
> + div = roundup_pow_of_two(div);
> if (table)
> div = _round_up_table(table, div);
>
> @@ -240,8 +240,8 @@ static int _div_round_closest(const struct clk_div_table *table,
> down = parent_rate / rate;
>
> if (flags & CLK_DIVIDER_POWER_OF_TWO) {
> - up = __roundup_pow_of_two(up);
> - down = __rounddown_pow_of_two(down);
> + up = roundup_pow_of_two(up);
> + down = rounddown_pow_of_two(down);
> } else if (table) {
> up = _round_up_table(table, up);
> down = _round_down_table(table, down);
> @@ -278,7 +278,7 @@ static int _next_div(const struct clk_div_table *table, int div,
> div++;
>
> if (flags & CLK_DIVIDER_POWER_OF_TWO)
> - return __roundup_pow_of_two(div);
> + return roundup_pow_of_two(div);
> if (table)
> return _round_up_table(table, div);
>
> diff --git a/drivers/clk/sunxi/clk-sunxi.c b/drivers/clk/sunxi/clk-sunxi.c
> index 27201fd26e44..faec99dc09c0 100644
> --- a/drivers/clk/sunxi/clk-sunxi.c
> +++ b/drivers/clk/sunxi/clk-sunxi.c
> @@ -311,7 +311,7 @@ static void sun6i_get_ahb1_factors(struct factors_request *req)
>
> calcm = DIV_ROUND_UP(div, 1 << calcp);
> } else {
> - calcp = __roundup_pow_of_two(div);
> + calcp = roundup_pow_of_two(div);
> calcp = calcp > 3 ? 3 : calcp;
> }
>
> diff --git a/drivers/infiniband/hw/hfi1/chip.c b/drivers/infiniband/hw/hfi1/chip.c
> index 9b1fb84a3d45..96b1d343c32f 100644
> --- a/drivers/infiniband/hw/hfi1/chip.c
> +++ b/drivers/infiniband/hw/hfi1/chip.c
> @@ -14199,10 +14199,10 @@ static int qos_rmt_entries(struct hfi1_devdata *dd, unsigned int *mp,
> max_by_vl = krcvqs[i];
> if (max_by_vl > 32)
> goto no_qos;
> - m = ilog2(__roundup_pow_of_two(max_by_vl));
> + m = ilog2(roundup_pow_of_two(max_by_vl));
>
> /* determine bits for vl */
> - n = ilog2(__roundup_pow_of_two(num_vls));
> + n = ilog2(roundup_pow_of_two(num_vls));
>
> /* reject if too much is used */
> if ((m + n) > 7)
> diff --git a/drivers/infiniband/hw/hfi1/init.c b/drivers/infiniband/hw/hfi1/init.c
> index 26b792bb1027..838c789c7cce 100644
> --- a/drivers/infiniband/hw/hfi1/init.c
> +++ b/drivers/infiniband/hw/hfi1/init.c
> @@ -467,7 +467,7 @@ int hfi1_create_ctxtdata(struct hfi1_pportdata *ppd, int numa,
> * MTU supported.
> */
> if (rcd->egrbufs.size < hfi1_max_mtu) {
> - rcd->egrbufs.size = __roundup_pow_of_two(hfi1_max_mtu);
> + rcd->egrbufs.size = roundup_pow_of_two(hfi1_max_mtu);
> hfi1_cdbg(PROC,
> "ctxt%u: eager bufs size too small. Adjusting to %u\n",
> rcd->ctxt, rcd->egrbufs.size);
> @@ -1959,7 +1959,7 @@ int hfi1_setup_eagerbufs(struct hfi1_ctxtdata *rcd)
> * to satisfy the "multiple of 8 RcvArray entries" requirement.
> */
> if (rcd->egrbufs.size <= (1 << 20))
> - rcd->egrbufs.rcvtid_size = max((unsigned long)round_mtu,
> + rcd->egrbufs.rcvtid_size = max((unsigned long long)round_mtu,
> rounddown_pow_of_two(rcd->egrbufs.size / 8));
>
> while (alloced_bytes < rcd->egrbufs.size &&
> diff --git a/drivers/infiniband/hw/mlx4/srq.c b/drivers/infiniband/hw/mlx4/srq.c
> index 8dcf6e3d9ae2..7e685600a7b3 100644
> --- a/drivers/infiniband/hw/mlx4/srq.c
> +++ b/drivers/infiniband/hw/mlx4/srq.c
> @@ -96,7 +96,7 @@ int mlx4_ib_create_srq(struct ib_srq *ib_srq,
> srq->msrq.max = roundup_pow_of_two(init_attr->attr.max_wr + 1);
> srq->msrq.max_gs = init_attr->attr.max_sge;
>
> - desc_size = max(32UL,
> + desc_size = max(32ULL,
> roundup_pow_of_two(sizeof (struct mlx4_wqe_srq_next_seg) +
> srq->msrq.max_gs *
> sizeof (struct mlx4_wqe_data_seg)));
> diff --git a/drivers/infiniband/hw/mthca/mthca_srq.c b/drivers/infiniband/hw/mthca/mthca_srq.c
> index a85935ccce88..0c2e14b4142a 100644
> --- a/drivers/infiniband/hw/mthca/mthca_srq.c
> +++ b/drivers/infiniband/hw/mthca/mthca_srq.c
> @@ -225,7 +225,7 @@ int mthca_alloc_srq(struct mthca_dev *dev, struct mthca_pd *pd,
> else
> srq->max = srq->max + 1;
>
> - ds = max(64UL,
> + ds = max(64ULL,
> roundup_pow_of_two(sizeof (struct mthca_next_seg) +
> srq->max_gs * sizeof (struct mthca_data_seg)));
>
> diff --git a/drivers/infiniband/sw/rxe/rxe_qp.c b/drivers/infiniband/sw/rxe/rxe_qp.c
> index e2c6d1cedf41..040b707b0877 100644
> --- a/drivers/infiniband/sw/rxe/rxe_qp.c
> +++ b/drivers/infiniband/sw/rxe/rxe_qp.c
> @@ -592,7 +592,7 @@ int rxe_qp_from_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask,
> int err;
>
> if (mask & IB_QP_MAX_QP_RD_ATOMIC) {
> - int max_rd_atomic = __roundup_pow_of_two(attr->max_rd_atomic);
> + int max_rd_atomic = roundup_pow_of_two(attr->max_rd_atomic);
>
> qp->attr.max_rd_atomic = max_rd_atomic;
> atomic_set(&qp->req.rd_atomic, max_rd_atomic);
> @@ -600,7 +600,7 @@ int rxe_qp_from_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask,
>
> if (mask & IB_QP_MAX_DEST_RD_ATOMIC) {
> int max_dest_rd_atomic =
> - __roundup_pow_of_two(attr->max_dest_rd_atomic);
> + roundup_pow_of_two(attr->max_dest_rd_atomic);
>
> qp->attr.max_dest_rd_atomic = max_dest_rd_atomic;
>
> diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
> index 0c8d81f56a30..ce7c900bd666 100644
> --- a/drivers/iommu/intel-iommu.c
> +++ b/drivers/iommu/intel-iommu.c
> @@ -1488,7 +1488,7 @@ static void iommu_flush_iotlb_psi(struct intel_iommu *iommu,
> unsigned long pfn, unsigned int pages,
> int ih, int map)
> {
> - unsigned int mask = ilog2(__roundup_pow_of_two(pages));
> + unsigned int mask = ilog2(roundup_pow_of_two(pages));
> uint64_t addr = (uint64_t)pfn << VTD_PAGE_SHIFT;
> u16 did = domain->iommu_did[iommu->seq_id];
>
> @@ -3390,7 +3390,7 @@ static unsigned long intel_alloc_iova(struct device *dev,
> /* Restrict dma_mask to the width that the iommu can handle */
> dma_mask = min_t(uint64_t, DOMAIN_MAX_ADDR(domain->gaw), dma_mask);
> /* Ensure we reserve the whole size-aligned region */
> - nrpages = __roundup_pow_of_two(nrpages);
> + nrpages = roundup_pow_of_two(nrpages);
>
> if (!dmar_forcedac && dma_mask > DMA_BIT_MASK(32)) {
> /*
> diff --git a/drivers/iommu/intel-svm.c b/drivers/iommu/intel-svm.c
> index 9b159132405d..602caca3cd1a 100644
> --- a/drivers/iommu/intel-svm.c
> +++ b/drivers/iommu/intel-svm.c
> @@ -115,7 +115,7 @@ static void intel_flush_svm_range_dev (struct intel_svm *svm, struct intel_svm_d
> QI_EIOTLB_TYPE;
> desc.qw1 = 0;
> } else {
> - int mask = ilog2(__roundup_pow_of_two(pages));
> + int mask = ilog2(roundup_pow_of_two(pages));
>
> desc.qw0 = QI_EIOTLB_PASID(svm->pasid) |
> QI_EIOTLB_DID(sdev->did) |
> @@ -142,7 +142,7 @@ static void intel_flush_svm_range_dev (struct intel_svm *svm, struct intel_svm_d
> * for example, an "address" value of 0x12345f000 will
> * flush from 0x123440000 to 0x12347ffff (256KiB). */
> unsigned long last = address + ((unsigned long)(pages - 1) << VTD_PAGE_SHIFT);
> - unsigned long mask = __rounddown_pow_of_two(address ^ last);
> + unsigned long mask = rounddown_pow_of_two(address ^ last);
>
> desc.qw1 = QI_DEV_EIOTLB_ADDR((address & ~mask) |
> (mask - 1)) | QI_DEV_EIOTLB_SIZE;
> diff --git a/drivers/iommu/intel_irq_remapping.c b/drivers/iommu/intel_irq_remapping.c
> index 81e43c1df7ec..935657b2c661 100644
> --- a/drivers/iommu/intel_irq_remapping.c
> +++ b/drivers/iommu/intel_irq_remapping.c
> @@ -113,7 +113,7 @@ static int alloc_irte(struct intel_iommu *iommu,
> return -1;
>
> if (count > 1) {
> - count = __roundup_pow_of_two(count);
> + count = roundup_pow_of_two(count);
> mask = ilog2(count);
> }
>
> diff --git a/drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c b/drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c
> index 6a757dadb5f1..fd5b12c23eaa 100644
> --- a/drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c
> +++ b/drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c
> @@ -680,13 +680,13 @@ static int xgbe_set_ringparam(struct net_device *netdev,
> return -EINVAL;
> }
>
> - rx = __rounddown_pow_of_two(ringparam->rx_pending);
> + rx = rounddown_pow_of_two(ringparam->rx_pending);
> if (rx != ringparam->rx_pending)
> netdev_notice(netdev,
> "rx ring parameter rounded to power of two: %u\n",
> rx);
>
> - tx = __rounddown_pow_of_two(ringparam->tx_pending);
> + tx = rounddown_pow_of_two(ringparam->tx_pending);
> if (tx != ringparam->tx_pending)
> netdev_notice(netdev,
> "tx ring parameter rounded to power of two: %u\n",
> diff --git a/drivers/net/ethernet/marvell/sky2.c b/drivers/net/ethernet/marvell/sky2.c
> index 5f56ee83e3b1..cc3a03b4a611 100644
> --- a/drivers/net/ethernet/marvell/sky2.c
> +++ b/drivers/net/ethernet/marvell/sky2.c
> @@ -4139,7 +4139,7 @@ static int sky2_set_coalesce(struct net_device *dev,
> */
> static unsigned long roundup_ring_size(unsigned long pending)
> {
> - return max(128ul, roundup_pow_of_two(pending+1));
> + return max(128ull, roundup_pow_of_two(pending+1));
> }
>
> static void sky2_get_ringparam(struct net_device *dev,
> diff --git a/drivers/net/ethernet/rocker/rocker_hw.h b/drivers/net/ethernet/rocker/rocker_hw.h
> index 59f1f8b690d2..d8de15509e2c 100644
> --- a/drivers/net/ethernet/rocker/rocker_hw.h
> +++ b/drivers/net/ethernet/rocker/rocker_hw.h
> @@ -88,8 +88,8 @@ enum rocker_dma_type {
> };
>
> /* Rocker DMA ring size limits and default sizes */
> -#define ROCKER_DMA_SIZE_MIN 2ul
> -#define ROCKER_DMA_SIZE_MAX 65536ul
> +#define ROCKER_DMA_SIZE_MIN 2ull
> +#define ROCKER_DMA_SIZE_MAX 65536ull
> #define ROCKER_DMA_CMD_DEFAULT_SIZE 32ul
> #define ROCKER_DMA_EVENT_DEFAULT_SIZE 32ul
> #define ROCKER_DMA_TX_DEFAULT_SIZE 64ul
> diff --git a/drivers/net/ethernet/sfc/ef10.c b/drivers/net/ethernet/sfc/ef10.c
> index 4d9bbccc6f89..4f4d9a5b3b75 100644
> --- a/drivers/net/ethernet/sfc/ef10.c
> +++ b/drivers/net/ethernet/sfc/ef10.c
> @@ -27,7 +27,7 @@ enum {
> };
> /* The maximum size of a shared RSS context */
> /* TODO: this should really be from the mcdi protocol export */
> -#define EFX_EF10_MAX_SHARED_RSS_CONTEXT_SIZE 64UL
> +#define EFX_EF10_MAX_SHARED_RSS_CONTEXT_SIZE 64ULL
>
> /* The filter table(s) are managed by firmware and we have write-only
> * access. When removing filters we must identify them to the
> diff --git a/drivers/net/ethernet/sfc/efx.h b/drivers/net/ethernet/sfc/efx.h
> index 2dd8d5002315..fea2add5860e 100644
> --- a/drivers/net/ethernet/sfc/efx.h
> +++ b/drivers/net/ethernet/sfc/efx.h
> @@ -52,7 +52,7 @@ void efx_schedule_slow_fill(struct efx_rx_queue *rx_queue);
>
> #define EFX_MAX_DMAQ_SIZE 4096UL
> #define EFX_DEFAULT_DMAQ_SIZE 1024UL
> -#define EFX_MIN_DMAQ_SIZE 512UL
> +#define EFX_MIN_DMAQ_SIZE 512ULL
>
> #define EFX_MAX_EVQ_SIZE 16384UL
> #define EFX_MIN_EVQ_SIZE 512UL
> diff --git a/drivers/net/ethernet/sfc/falcon/efx.h b/drivers/net/ethernet/sfc/falcon/efx.h
> index d3b4646545fa..0d16257156d6 100644
> --- a/drivers/net/ethernet/sfc/falcon/efx.h
> +++ b/drivers/net/ethernet/sfc/falcon/efx.h
> @@ -55,7 +55,7 @@ void ef4_schedule_slow_fill(struct ef4_rx_queue *rx_queue);
>
> #define EF4_MAX_DMAQ_SIZE 4096UL
> #define EF4_DEFAULT_DMAQ_SIZE 1024UL
> -#define EF4_MIN_DMAQ_SIZE 512UL
> +#define EF4_MIN_DMAQ_SIZE 512ULL
>
> #define EF4_MAX_EVQ_SIZE 16384UL
> #define EF4_MIN_EVQ_SIZE 512UL
> diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c
> index c7709e49f0e4..f0391e88bc42 100644
> --- a/drivers/pci/msi.c
> +++ b/drivers/pci/msi.c
> @@ -578,7 +578,7 @@ msi_setup_entry(struct pci_dev *dev, int nvec, struct irq_affinity *affd)
> entry->msi_attrib.maskbit = !!(control & PCI_MSI_FLAGS_MASKBIT);
> entry->msi_attrib.default_irq = dev->irq; /* Save IOAPIC IRQ */
> entry->msi_attrib.multi_cap = (control & PCI_MSI_FLAGS_QMASK) >> 1;
> - entry->msi_attrib.multiple = ilog2(__roundup_pow_of_two(nvec));
> + entry->msi_attrib.multiple = ilog2(roundup_pow_of_two(nvec));
>
> if (control & PCI_MSI_FLAGS_64BIT)
> entry->mask_pos = dev->msi_cap + PCI_MSI_MASK_64;
> diff --git a/include/linux/log2.h b/include/linux/log2.h
> index 83a4a3ca3e8a..53a727303dac 100644
> --- a/include/linux/log2.h
> +++ b/include/linux/log2.h
> @@ -47,26 +47,6 @@ bool is_power_of_2(unsigned long n)
> return (n != 0 && ((n & (n - 1)) == 0));
> }
>
> -/**
> - * __roundup_pow_of_two() - round up to nearest power of two
> - * @n: value to round up
> - */
> -static inline __attribute__((const))
> -unsigned long __roundup_pow_of_two(unsigned long n)
> -{
> - return 1UL << fls_long(n - 1);
> -}
> -
> -/**
> - * __rounddown_pow_of_two() - round down to nearest power of two
> - * @n: value to round down
> - */
> -static inline __attribute__((const))
> -unsigned long __rounddown_pow_of_two(unsigned long n)
> -{
> - return 1UL << (fls_long(n) - 1);
> -}
> -
> /**
> * const_ilog2 - log base 2 of 32-bit or a 64-bit constant unsigned value
> * @n: parameter
> @@ -170,14 +150,11 @@ unsigned long __rounddown_pow_of_two(unsigned long n)
> * - the result is undefined when n == 0
> * - this can be used to initialise global variables from constant data
> */
> -#define roundup_pow_of_two(n) \
> -( \
> - __builtin_constant_p(n) ? ( \
> - (n == 1) ? 1 : \
> - (1UL << (ilog2((n) - 1) + 1)) \
> - ) : \
> - __roundup_pow_of_two(n) \
> - )
> +#define roundup_pow_of_two(n) \
> +( \
> + (__builtin_constant_p(n) && ((n) == 1)) ? \
> + 1 : (1ULL << (ilog2((n) - 1) + 1)) \
> +)
>
> /**
> * rounddown_pow_of_two - round the given value down to nearest power of two
> @@ -187,12 +164,11 @@ unsigned long __rounddown_pow_of_two(unsigned long n)
> * - the result is undefined when n == 0
> * - this can be used to initialise global variables from constant data
> */
> -#define rounddown_pow_of_two(n) \
> -( \
> - __builtin_constant_p(n) ? ( \
> - (1UL << ilog2(n))) : \
> - __rounddown_pow_of_two(n) \
> - )
> +#define rounddown_pow_of_two(n) \
> +( \
> + (__builtin_constant_p(n) && ((n) == 1)) ? \
> + 1 : (1ULL << (ilog2(n))) \
> +)
>
> static inline __attribute_const__
> int __order_base_2(unsigned long n)
> diff --git a/kernel/kexec_core.c b/kernel/kexec_core.c
> index 15d70a90b50d..bb9efc6944a4 100644
> --- a/kernel/kexec_core.c
> +++ b/kernel/kexec_core.c
> @@ -1094,7 +1094,8 @@ static int __init crash_notes_memory_init(void)
> * crash_notes is allocated inside one physical page.
> */
> size = sizeof(note_buf_t);
> - align = min(roundup_pow_of_two(sizeof(note_buf_t)), PAGE_SIZE);
> + align = min(roundup_pow_of_two(sizeof(note_buf_t)),
> + (unsigned long long)PAGE_SIZE);
>
> /*
> * Break compile if size is bigger than PAGE_SIZE since crash_notes
> diff --git a/lib/rhashtable.c b/lib/rhashtable.c
> index bdb7e4cadf05..70908678c7a8 100644
> --- a/lib/rhashtable.c
> +++ b/lib/rhashtable.c
> @@ -950,7 +950,7 @@ static size_t rounded_hashtable_size(const struct rhashtable_params *params)
>
> if (params->nelem_hint)
> retsize = max(roundup_pow_of_two(params->nelem_hint * 4 / 3),
> - (unsigned long)params->min_size);
> + (unsigned long long)params->min_size);
> else
> retsize = max(HASH_DEFAULT_SIZE,
> (unsigned long)params->min_size);
> diff --git a/net/sunrpc/xprtrdma/verbs.c b/net/sunrpc/xprtrdma/verbs.c
> index 77c7dd7f05e8..78fb8ccabddd 100644
> --- a/net/sunrpc/xprtrdma/verbs.c
> +++ b/net/sunrpc/xprtrdma/verbs.c
> @@ -1015,7 +1015,7 @@ struct rpcrdma_req *rpcrdma_req_create(struct rpcrdma_xprt *r_xprt, size_t size,
> maxhdrsize = rpcrdma_fixed_maxsz + 3 +
> r_xprt->rx_ia.ri_max_segs * rpcrdma_readchunk_maxsz;
> maxhdrsize *= sizeof(__be32);
> - rb = rpcrdma_regbuf_alloc(__roundup_pow_of_two(maxhdrsize),
> + rb = rpcrdma_regbuf_alloc(roundup_pow_of_two(maxhdrsize),
> DMA_TO_DEVICE, flags);
> if (!rb)
> goto out2;
For the xprtrdma chunk:
Reviewed-by: Chuck Lever <chuck.lever@oracle.com>
--
Chuck Lever
_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu
^ permalink raw reply [flat|nested] 71+ messages in thread
* Re: [PATCH v4 7/8] linux/log2.h: Fix 64bit calculations in roundup/down_pow_two()
@ 2019-12-03 16:39 ` Chuck Lever
0 siblings, 0 replies; 71+ messages in thread
From: Chuck Lever @ 2019-12-03 16:39 UTC (permalink / raw)
To: Nicolas Saenz Julienne
Cc: linux-pci, Michael Turquette, Bruce Fields,
Linux NFS Mailing List, Edward Cree, linux-clk, f.fainelli,
Herbert Xu, Emilio López, maz, Joerg Roedel, phil,
Doug Ledford, Jason Gunthorpe, Chen-Yu Tsai, Martin Habets,
wahrenst, Tom Lendacky, Jiri Pirko, Solarflare linux maintainers,
Maxime Ripard, linux-rpi-kernel, Anna Schumaker, Bjorn Helgaas,
Trond Myklebust, linux-arm-kernel, Mirko Lindner,
Mike Marciniszyn, mbrugger, Stephen Boyd, netdev, Yishai Hadas,
kexec, Linux Kernel Mailing List, jeremy.linton, David S. Miller,
Stephen Hemminger, linux-rdma, iommu, Moni Shoua,
Eric W. Biederman, james.quinlan, Thomas Graf, andrew.murray,
Robin Murphy, David Woodhouse, Dennis Dalessandro, Lu Baolu
> On Dec 3, 2019, at 6:47 AM, Nicolas Saenz Julienne <nsaenzjulienne@suse.de> wrote:
>
> Some users need to make sure their rounding function accepts and returns
> 64bit long variables regardless of the architecture. Sadly
> roundup/rounddown_pow_two() takes and returns unsigned longs. It turns
> out ilog2() already handles 32/64bit calculations properly, and being
> the building block to the round functions we can rework them as a
> wrapper around it.
>
> Suggested-by: Robin Murphy <robin.murphy@arm.con>
> Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
> ---
> drivers/clk/clk-divider.c | 8 ++--
> drivers/clk/sunxi/clk-sunxi.c | 2 +-
> drivers/infiniband/hw/hfi1/chip.c | 4 +-
> drivers/infiniband/hw/hfi1/init.c | 4 +-
> drivers/infiniband/hw/mlx4/srq.c | 2 +-
> drivers/infiniband/hw/mthca/mthca_srq.c | 2 +-
> drivers/infiniband/sw/rxe/rxe_qp.c | 4 +-
> drivers/iommu/intel-iommu.c | 4 +-
> drivers/iommu/intel-svm.c | 4 +-
> drivers/iommu/intel_irq_remapping.c | 2 +-
> drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c | 4 +-
> drivers/net/ethernet/marvell/sky2.c | 2 +-
> drivers/net/ethernet/rocker/rocker_hw.h | 4 +-
> drivers/net/ethernet/sfc/ef10.c | 2 +-
> drivers/net/ethernet/sfc/efx.h | 2 +-
> drivers/net/ethernet/sfc/falcon/efx.h | 2 +-
> drivers/pci/msi.c | 2 +-
> include/linux/log2.h | 44 +++++---------------
> kernel/kexec_core.c | 3 +-
> lib/rhashtable.c | 2 +-
> net/sunrpc/xprtrdma/verbs.c | 2 +-
> 21 files changed, 41 insertions(+), 64 deletions(-)
>
> diff --git a/drivers/clk/clk-divider.c b/drivers/clk/clk-divider.c
> index 098b2b01f0af..ba947e4c8193 100644
> --- a/drivers/clk/clk-divider.c
> +++ b/drivers/clk/clk-divider.c
> @@ -222,7 +222,7 @@ static int _div_round_up(const struct clk_div_table *table,
> int div = DIV_ROUND_UP_ULL((u64)parent_rate, rate);
>
> if (flags & CLK_DIVIDER_POWER_OF_TWO)
> - div = __roundup_pow_of_two(div);
> + div = roundup_pow_of_two(div);
> if (table)
> div = _round_up_table(table, div);
>
> @@ -240,8 +240,8 @@ static int _div_round_closest(const struct clk_div_table *table,
> down = parent_rate / rate;
>
> if (flags & CLK_DIVIDER_POWER_OF_TWO) {
> - up = __roundup_pow_of_two(up);
> - down = __rounddown_pow_of_two(down);
> + up = roundup_pow_of_two(up);
> + down = rounddown_pow_of_two(down);
> } else if (table) {
> up = _round_up_table(table, up);
> down = _round_down_table(table, down);
> @@ -278,7 +278,7 @@ static int _next_div(const struct clk_div_table *table, int div,
> div++;
>
> if (flags & CLK_DIVIDER_POWER_OF_TWO)
> - return __roundup_pow_of_two(div);
> + return roundup_pow_of_two(div);
> if (table)
> return _round_up_table(table, div);
>
> diff --git a/drivers/clk/sunxi/clk-sunxi.c b/drivers/clk/sunxi/clk-sunxi.c
> index 27201fd26e44..faec99dc09c0 100644
> --- a/drivers/clk/sunxi/clk-sunxi.c
> +++ b/drivers/clk/sunxi/clk-sunxi.c
> @@ -311,7 +311,7 @@ static void sun6i_get_ahb1_factors(struct factors_request *req)
>
> calcm = DIV_ROUND_UP(div, 1 << calcp);
> } else {
> - calcp = __roundup_pow_of_two(div);
> + calcp = roundup_pow_of_two(div);
> calcp = calcp > 3 ? 3 : calcp;
> }
>
> diff --git a/drivers/infiniband/hw/hfi1/chip.c b/drivers/infiniband/hw/hfi1/chip.c
> index 9b1fb84a3d45..96b1d343c32f 100644
> --- a/drivers/infiniband/hw/hfi1/chip.c
> +++ b/drivers/infiniband/hw/hfi1/chip.c
> @@ -14199,10 +14199,10 @@ static int qos_rmt_entries(struct hfi1_devdata *dd, unsigned int *mp,
> max_by_vl = krcvqs[i];
> if (max_by_vl > 32)
> goto no_qos;
> - m = ilog2(__roundup_pow_of_two(max_by_vl));
> + m = ilog2(roundup_pow_of_two(max_by_vl));
>
> /* determine bits for vl */
> - n = ilog2(__roundup_pow_of_two(num_vls));
> + n = ilog2(roundup_pow_of_two(num_vls));
>
> /* reject if too much is used */
> if ((m + n) > 7)
> diff --git a/drivers/infiniband/hw/hfi1/init.c b/drivers/infiniband/hw/hfi1/init.c
> index 26b792bb1027..838c789c7cce 100644
> --- a/drivers/infiniband/hw/hfi1/init.c
> +++ b/drivers/infiniband/hw/hfi1/init.c
> @@ -467,7 +467,7 @@ int hfi1_create_ctxtdata(struct hfi1_pportdata *ppd, int numa,
> * MTU supported.
> */
> if (rcd->egrbufs.size < hfi1_max_mtu) {
> - rcd->egrbufs.size = __roundup_pow_of_two(hfi1_max_mtu);
> + rcd->egrbufs.size = roundup_pow_of_two(hfi1_max_mtu);
> hfi1_cdbg(PROC,
> "ctxt%u: eager bufs size too small. Adjusting to %u\n",
> rcd->ctxt, rcd->egrbufs.size);
> @@ -1959,7 +1959,7 @@ int hfi1_setup_eagerbufs(struct hfi1_ctxtdata *rcd)
> * to satisfy the "multiple of 8 RcvArray entries" requirement.
> */
> if (rcd->egrbufs.size <= (1 << 20))
> - rcd->egrbufs.rcvtid_size = max((unsigned long)round_mtu,
> + rcd->egrbufs.rcvtid_size = max((unsigned long long)round_mtu,
> rounddown_pow_of_two(rcd->egrbufs.size / 8));
>
> while (alloced_bytes < rcd->egrbufs.size &&
> diff --git a/drivers/infiniband/hw/mlx4/srq.c b/drivers/infiniband/hw/mlx4/srq.c
> index 8dcf6e3d9ae2..7e685600a7b3 100644
> --- a/drivers/infiniband/hw/mlx4/srq.c
> +++ b/drivers/infiniband/hw/mlx4/srq.c
> @@ -96,7 +96,7 @@ int mlx4_ib_create_srq(struct ib_srq *ib_srq,
> srq->msrq.max = roundup_pow_of_two(init_attr->attr.max_wr + 1);
> srq->msrq.max_gs = init_attr->attr.max_sge;
>
> - desc_size = max(32UL,
> + desc_size = max(32ULL,
> roundup_pow_of_two(sizeof (struct mlx4_wqe_srq_next_seg) +
> srq->msrq.max_gs *
> sizeof (struct mlx4_wqe_data_seg)));
> diff --git a/drivers/infiniband/hw/mthca/mthca_srq.c b/drivers/infiniband/hw/mthca/mthca_srq.c
> index a85935ccce88..0c2e14b4142a 100644
> --- a/drivers/infiniband/hw/mthca/mthca_srq.c
> +++ b/drivers/infiniband/hw/mthca/mthca_srq.c
> @@ -225,7 +225,7 @@ int mthca_alloc_srq(struct mthca_dev *dev, struct mthca_pd *pd,
> else
> srq->max = srq->max + 1;
>
> - ds = max(64UL,
> + ds = max(64ULL,
> roundup_pow_of_two(sizeof (struct mthca_next_seg) +
> srq->max_gs * sizeof (struct mthca_data_seg)));
>
> diff --git a/drivers/infiniband/sw/rxe/rxe_qp.c b/drivers/infiniband/sw/rxe/rxe_qp.c
> index e2c6d1cedf41..040b707b0877 100644
> --- a/drivers/infiniband/sw/rxe/rxe_qp.c
> +++ b/drivers/infiniband/sw/rxe/rxe_qp.c
> @@ -592,7 +592,7 @@ int rxe_qp_from_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask,
> int err;
>
> if (mask & IB_QP_MAX_QP_RD_ATOMIC) {
> - int max_rd_atomic = __roundup_pow_of_two(attr->max_rd_atomic);
> + int max_rd_atomic = roundup_pow_of_two(attr->max_rd_atomic);
>
> qp->attr.max_rd_atomic = max_rd_atomic;
> atomic_set(&qp->req.rd_atomic, max_rd_atomic);
> @@ -600,7 +600,7 @@ int rxe_qp_from_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask,
>
> if (mask & IB_QP_MAX_DEST_RD_ATOMIC) {
> int max_dest_rd_atomic =
> - __roundup_pow_of_two(attr->max_dest_rd_atomic);
> + roundup_pow_of_two(attr->max_dest_rd_atomic);
>
> qp->attr.max_dest_rd_atomic = max_dest_rd_atomic;
>
> diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
> index 0c8d81f56a30..ce7c900bd666 100644
> --- a/drivers/iommu/intel-iommu.c
> +++ b/drivers/iommu/intel-iommu.c
> @@ -1488,7 +1488,7 @@ static void iommu_flush_iotlb_psi(struct intel_iommu *iommu,
> unsigned long pfn, unsigned int pages,
> int ih, int map)
> {
> - unsigned int mask = ilog2(__roundup_pow_of_two(pages));
> + unsigned int mask = ilog2(roundup_pow_of_two(pages));
> uint64_t addr = (uint64_t)pfn << VTD_PAGE_SHIFT;
> u16 did = domain->iommu_did[iommu->seq_id];
>
> @@ -3390,7 +3390,7 @@ static unsigned long intel_alloc_iova(struct device *dev,
> /* Restrict dma_mask to the width that the iommu can handle */
> dma_mask = min_t(uint64_t, DOMAIN_MAX_ADDR(domain->gaw), dma_mask);
> /* Ensure we reserve the whole size-aligned region */
> - nrpages = __roundup_pow_of_two(nrpages);
> + nrpages = roundup_pow_of_two(nrpages);
>
> if (!dmar_forcedac && dma_mask > DMA_BIT_MASK(32)) {
> /*
> diff --git a/drivers/iommu/intel-svm.c b/drivers/iommu/intel-svm.c
> index 9b159132405d..602caca3cd1a 100644
> --- a/drivers/iommu/intel-svm.c
> +++ b/drivers/iommu/intel-svm.c
> @@ -115,7 +115,7 @@ static void intel_flush_svm_range_dev (struct intel_svm *svm, struct intel_svm_d
> QI_EIOTLB_TYPE;
> desc.qw1 = 0;
> } else {
> - int mask = ilog2(__roundup_pow_of_two(pages));
> + int mask = ilog2(roundup_pow_of_two(pages));
>
> desc.qw0 = QI_EIOTLB_PASID(svm->pasid) |
> QI_EIOTLB_DID(sdev->did) |
> @@ -142,7 +142,7 @@ static void intel_flush_svm_range_dev (struct intel_svm *svm, struct intel_svm_d
> * for example, an "address" value of 0x12345f000 will
> * flush from 0x123440000 to 0x12347ffff (256KiB). */
> unsigned long last = address + ((unsigned long)(pages - 1) << VTD_PAGE_SHIFT);
> - unsigned long mask = __rounddown_pow_of_two(address ^ last);
> + unsigned long mask = rounddown_pow_of_two(address ^ last);
>
> desc.qw1 = QI_DEV_EIOTLB_ADDR((address & ~mask) |
> (mask - 1)) | QI_DEV_EIOTLB_SIZE;
> diff --git a/drivers/iommu/intel_irq_remapping.c b/drivers/iommu/intel_irq_remapping.c
> index 81e43c1df7ec..935657b2c661 100644
> --- a/drivers/iommu/intel_irq_remapping.c
> +++ b/drivers/iommu/intel_irq_remapping.c
> @@ -113,7 +113,7 @@ static int alloc_irte(struct intel_iommu *iommu,
> return -1;
>
> if (count > 1) {
> - count = __roundup_pow_of_two(count);
> + count = roundup_pow_of_two(count);
> mask = ilog2(count);
> }
>
> diff --git a/drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c b/drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c
> index 6a757dadb5f1..fd5b12c23eaa 100644
> --- a/drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c
> +++ b/drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c
> @@ -680,13 +680,13 @@ static int xgbe_set_ringparam(struct net_device *netdev,
> return -EINVAL;
> }
>
> - rx = __rounddown_pow_of_two(ringparam->rx_pending);
> + rx = rounddown_pow_of_two(ringparam->rx_pending);
> if (rx != ringparam->rx_pending)
> netdev_notice(netdev,
> "rx ring parameter rounded to power of two: %u\n",
> rx);
>
> - tx = __rounddown_pow_of_two(ringparam->tx_pending);
> + tx = rounddown_pow_of_two(ringparam->tx_pending);
> if (tx != ringparam->tx_pending)
> netdev_notice(netdev,
> "tx ring parameter rounded to power of two: %u\n",
> diff --git a/drivers/net/ethernet/marvell/sky2.c b/drivers/net/ethernet/marvell/sky2.c
> index 5f56ee83e3b1..cc3a03b4a611 100644
> --- a/drivers/net/ethernet/marvell/sky2.c
> +++ b/drivers/net/ethernet/marvell/sky2.c
> @@ -4139,7 +4139,7 @@ static int sky2_set_coalesce(struct net_device *dev,
> */
> static unsigned long roundup_ring_size(unsigned long pending)
> {
> - return max(128ul, roundup_pow_of_two(pending+1));
> + return max(128ull, roundup_pow_of_two(pending+1));
> }
>
> static void sky2_get_ringparam(struct net_device *dev,
> diff --git a/drivers/net/ethernet/rocker/rocker_hw.h b/drivers/net/ethernet/rocker/rocker_hw.h
> index 59f1f8b690d2..d8de15509e2c 100644
> --- a/drivers/net/ethernet/rocker/rocker_hw.h
> +++ b/drivers/net/ethernet/rocker/rocker_hw.h
> @@ -88,8 +88,8 @@ enum rocker_dma_type {
> };
>
> /* Rocker DMA ring size limits and default sizes */
> -#define ROCKER_DMA_SIZE_MIN 2ul
> -#define ROCKER_DMA_SIZE_MAX 65536ul
> +#define ROCKER_DMA_SIZE_MIN 2ull
> +#define ROCKER_DMA_SIZE_MAX 65536ull
> #define ROCKER_DMA_CMD_DEFAULT_SIZE 32ul
> #define ROCKER_DMA_EVENT_DEFAULT_SIZE 32ul
> #define ROCKER_DMA_TX_DEFAULT_SIZE 64ul
> diff --git a/drivers/net/ethernet/sfc/ef10.c b/drivers/net/ethernet/sfc/ef10.c
> index 4d9bbccc6f89..4f4d9a5b3b75 100644
> --- a/drivers/net/ethernet/sfc/ef10.c
> +++ b/drivers/net/ethernet/sfc/ef10.c
> @@ -27,7 +27,7 @@ enum {
> };
> /* The maximum size of a shared RSS context */
> /* TODO: this should really be from the mcdi protocol export */
> -#define EFX_EF10_MAX_SHARED_RSS_CONTEXT_SIZE 64UL
> +#define EFX_EF10_MAX_SHARED_RSS_CONTEXT_SIZE 64ULL
>
> /* The filter table(s) are managed by firmware and we have write-only
> * access. When removing filters we must identify them to the
> diff --git a/drivers/net/ethernet/sfc/efx.h b/drivers/net/ethernet/sfc/efx.h
> index 2dd8d5002315..fea2add5860e 100644
> --- a/drivers/net/ethernet/sfc/efx.h
> +++ b/drivers/net/ethernet/sfc/efx.h
> @@ -52,7 +52,7 @@ void efx_schedule_slow_fill(struct efx_rx_queue *rx_queue);
>
> #define EFX_MAX_DMAQ_SIZE 4096UL
> #define EFX_DEFAULT_DMAQ_SIZE 1024UL
> -#define EFX_MIN_DMAQ_SIZE 512UL
> +#define EFX_MIN_DMAQ_SIZE 512ULL
>
> #define EFX_MAX_EVQ_SIZE 16384UL
> #define EFX_MIN_EVQ_SIZE 512UL
> diff --git a/drivers/net/ethernet/sfc/falcon/efx.h b/drivers/net/ethernet/sfc/falcon/efx.h
> index d3b4646545fa..0d16257156d6 100644
> --- a/drivers/net/ethernet/sfc/falcon/efx.h
> +++ b/drivers/net/ethernet/sfc/falcon/efx.h
> @@ -55,7 +55,7 @@ void ef4_schedule_slow_fill(struct ef4_rx_queue *rx_queue);
>
> #define EF4_MAX_DMAQ_SIZE 4096UL
> #define EF4_DEFAULT_DMAQ_SIZE 1024UL
> -#define EF4_MIN_DMAQ_SIZE 512UL
> +#define EF4_MIN_DMAQ_SIZE 512ULL
>
> #define EF4_MAX_EVQ_SIZE 16384UL
> #define EF4_MIN_EVQ_SIZE 512UL
> diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c
> index c7709e49f0e4..f0391e88bc42 100644
> --- a/drivers/pci/msi.c
> +++ b/drivers/pci/msi.c
> @@ -578,7 +578,7 @@ msi_setup_entry(struct pci_dev *dev, int nvec, struct irq_affinity *affd)
> entry->msi_attrib.maskbit = !!(control & PCI_MSI_FLAGS_MASKBIT);
> entry->msi_attrib.default_irq = dev->irq; /* Save IOAPIC IRQ */
> entry->msi_attrib.multi_cap = (control & PCI_MSI_FLAGS_QMASK) >> 1;
> - entry->msi_attrib.multiple = ilog2(__roundup_pow_of_two(nvec));
> + entry->msi_attrib.multiple = ilog2(roundup_pow_of_two(nvec));
>
> if (control & PCI_MSI_FLAGS_64BIT)
> entry->mask_pos = dev->msi_cap + PCI_MSI_MASK_64;
> diff --git a/include/linux/log2.h b/include/linux/log2.h
> index 83a4a3ca3e8a..53a727303dac 100644
> --- a/include/linux/log2.h
> +++ b/include/linux/log2.h
> @@ -47,26 +47,6 @@ bool is_power_of_2(unsigned long n)
> return (n != 0 && ((n & (n - 1)) == 0));
> }
>
> -/**
> - * __roundup_pow_of_two() - round up to nearest power of two
> - * @n: value to round up
> - */
> -static inline __attribute__((const))
> -unsigned long __roundup_pow_of_two(unsigned long n)
> -{
> - return 1UL << fls_long(n - 1);
> -}
> -
> -/**
> - * __rounddown_pow_of_two() - round down to nearest power of two
> - * @n: value to round down
> - */
> -static inline __attribute__((const))
> -unsigned long __rounddown_pow_of_two(unsigned long n)
> -{
> - return 1UL << (fls_long(n) - 1);
> -}
> -
> /**
> * const_ilog2 - log base 2 of 32-bit or a 64-bit constant unsigned value
> * @n: parameter
> @@ -170,14 +150,11 @@ unsigned long __rounddown_pow_of_two(unsigned long n)
> * - the result is undefined when n == 0
> * - this can be used to initialise global variables from constant data
> */
> -#define roundup_pow_of_two(n) \
> -( \
> - __builtin_constant_p(n) ? ( \
> - (n == 1) ? 1 : \
> - (1UL << (ilog2((n) - 1) + 1)) \
> - ) : \
> - __roundup_pow_of_two(n) \
> - )
> +#define roundup_pow_of_two(n) \
> +( \
> + (__builtin_constant_p(n) && ((n) == 1)) ? \
> + 1 : (1ULL << (ilog2((n) - 1) + 1)) \
> +)
>
> /**
> * rounddown_pow_of_two - round the given value down to nearest power of two
> @@ -187,12 +164,11 @@ unsigned long __rounddown_pow_of_two(unsigned long n)
> * - the result is undefined when n == 0
> * - this can be used to initialise global variables from constant data
> */
> -#define rounddown_pow_of_two(n) \
> -( \
> - __builtin_constant_p(n) ? ( \
> - (1UL << ilog2(n))) : \
> - __rounddown_pow_of_two(n) \
> - )
> +#define rounddown_pow_of_two(n) \
> +( \
> + (__builtin_constant_p(n) && ((n) == 1)) ? \
> + 1 : (1ULL << (ilog2(n))) \
> +)
>
> static inline __attribute_const__
> int __order_base_2(unsigned long n)
> diff --git a/kernel/kexec_core.c b/kernel/kexec_core.c
> index 15d70a90b50d..bb9efc6944a4 100644
> --- a/kernel/kexec_core.c
> +++ b/kernel/kexec_core.c
> @@ -1094,7 +1094,8 @@ static int __init crash_notes_memory_init(void)
> * crash_notes is allocated inside one physical page.
> */
> size = sizeof(note_buf_t);
> - align = min(roundup_pow_of_two(sizeof(note_buf_t)), PAGE_SIZE);
> + align = min(roundup_pow_of_two(sizeof(note_buf_t)),
> + (unsigned long long)PAGE_SIZE);
>
> /*
> * Break compile if size is bigger than PAGE_SIZE since crash_notes
> diff --git a/lib/rhashtable.c b/lib/rhashtable.c
> index bdb7e4cadf05..70908678c7a8 100644
> --- a/lib/rhashtable.c
> +++ b/lib/rhashtable.c
> @@ -950,7 +950,7 @@ static size_t rounded_hashtable_size(const struct rhashtable_params *params)
>
> if (params->nelem_hint)
> retsize = max(roundup_pow_of_two(params->nelem_hint * 4 / 3),
> - (unsigned long)params->min_size);
> + (unsigned long long)params->min_size);
> else
> retsize = max(HASH_DEFAULT_SIZE,
> (unsigned long)params->min_size);
> diff --git a/net/sunrpc/xprtrdma/verbs.c b/net/sunrpc/xprtrdma/verbs.c
> index 77c7dd7f05e8..78fb8ccabddd 100644
> --- a/net/sunrpc/xprtrdma/verbs.c
> +++ b/net/sunrpc/xprtrdma/verbs.c
> @@ -1015,7 +1015,7 @@ struct rpcrdma_req *rpcrdma_req_create(struct rpcrdma_xprt *r_xprt, size_t size,
> maxhdrsize = rpcrdma_fixed_maxsz + 3 +
> r_xprt->rx_ia.ri_max_segs * rpcrdma_readchunk_maxsz;
> maxhdrsize *= sizeof(__be32);
> - rb = rpcrdma_regbuf_alloc(__roundup_pow_of_two(maxhdrsize),
> + rb = rpcrdma_regbuf_alloc(roundup_pow_of_two(maxhdrsize),
> DMA_TO_DEVICE, flags);
> if (!rb)
> goto out2;
For the xprtrdma chunk:
Reviewed-by: Chuck Lever <chuck.lever@oracle.com>
--
Chuck Lever
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply [flat|nested] 71+ messages in thread
* Re: [PATCH v4 7/8] linux/log2.h: Fix 64bit calculations in roundup/down_pow_two()
@ 2019-12-03 16:39 ` Chuck Lever
0 siblings, 0 replies; 71+ messages in thread
From: Chuck Lever @ 2019-12-03 16:39 UTC (permalink / raw)
To: Nicolas Saenz Julienne
Cc: linux-pci, Michael Turquette, Bruce Fields,
Linux NFS Mailing List, Edward Cree, linux-clk, f.fainelli,
Herbert Xu, Emilio López, maz, Joerg Roedel, phil,
Doug Ledford, Jason Gunthorpe, Chen-Yu Tsai, Martin Habets,
wahrenst, Tom Lendacky, Jiri Pirko, Solarflare linux maintainers,
Maxime Ripard, linux-rpi-kernel, Anna Schumaker, Bjorn Helgaas,
Trond Myklebust, linux-arm-kernel, Mirko Lindner,
Mike Marciniszyn, mbrugger, Stephen Boyd, netdev, Yishai Hadas,
kexec, Linux Kernel Mailing List, jeremy.linton, David S. Miller,
Stephen Hemminger, linux-rdma, iommu, Moni Shoua,
Eric W. Biederman, james.quinlan, Thomas Graf, andrew.murray,
Robin Murphy, David Woodhouse, Dennis Dalessandro, Lu Baolu
> On Dec 3, 2019, at 6:47 AM, Nicolas Saenz Julienne <nsaenzjulienne@suse.de> wrote:
>
> Some users need to make sure their rounding function accepts and returns
> 64bit long variables regardless of the architecture. Sadly
> roundup/rounddown_pow_two() takes and returns unsigned longs. It turns
> out ilog2() already handles 32/64bit calculations properly, and being
> the building block to the round functions we can rework them as a
> wrapper around it.
>
> Suggested-by: Robin Murphy <robin.murphy@arm.con>
> Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
> ---
> drivers/clk/clk-divider.c | 8 ++--
> drivers/clk/sunxi/clk-sunxi.c | 2 +-
> drivers/infiniband/hw/hfi1/chip.c | 4 +-
> drivers/infiniband/hw/hfi1/init.c | 4 +-
> drivers/infiniband/hw/mlx4/srq.c | 2 +-
> drivers/infiniband/hw/mthca/mthca_srq.c | 2 +-
> drivers/infiniband/sw/rxe/rxe_qp.c | 4 +-
> drivers/iommu/intel-iommu.c | 4 +-
> drivers/iommu/intel-svm.c | 4 +-
> drivers/iommu/intel_irq_remapping.c | 2 +-
> drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c | 4 +-
> drivers/net/ethernet/marvell/sky2.c | 2 +-
> drivers/net/ethernet/rocker/rocker_hw.h | 4 +-
> drivers/net/ethernet/sfc/ef10.c | 2 +-
> drivers/net/ethernet/sfc/efx.h | 2 +-
> drivers/net/ethernet/sfc/falcon/efx.h | 2 +-
> drivers/pci/msi.c | 2 +-
> include/linux/log2.h | 44 +++++---------------
> kernel/kexec_core.c | 3 +-
> lib/rhashtable.c | 2 +-
> net/sunrpc/xprtrdma/verbs.c | 2 +-
> 21 files changed, 41 insertions(+), 64 deletions(-)
>
> diff --git a/drivers/clk/clk-divider.c b/drivers/clk/clk-divider.c
> index 098b2b01f0af..ba947e4c8193 100644
> --- a/drivers/clk/clk-divider.c
> +++ b/drivers/clk/clk-divider.c
> @@ -222,7 +222,7 @@ static int _div_round_up(const struct clk_div_table *table,
> int div = DIV_ROUND_UP_ULL((u64)parent_rate, rate);
>
> if (flags & CLK_DIVIDER_POWER_OF_TWO)
> - div = __roundup_pow_of_two(div);
> + div = roundup_pow_of_two(div);
> if (table)
> div = _round_up_table(table, div);
>
> @@ -240,8 +240,8 @@ static int _div_round_closest(const struct clk_div_table *table,
> down = parent_rate / rate;
>
> if (flags & CLK_DIVIDER_POWER_OF_TWO) {
> - up = __roundup_pow_of_two(up);
> - down = __rounddown_pow_of_two(down);
> + up = roundup_pow_of_two(up);
> + down = rounddown_pow_of_two(down);
> } else if (table) {
> up = _round_up_table(table, up);
> down = _round_down_table(table, down);
> @@ -278,7 +278,7 @@ static int _next_div(const struct clk_div_table *table, int div,
> div++;
>
> if (flags & CLK_DIVIDER_POWER_OF_TWO)
> - return __roundup_pow_of_two(div);
> + return roundup_pow_of_two(div);
> if (table)
> return _round_up_table(table, div);
>
> diff --git a/drivers/clk/sunxi/clk-sunxi.c b/drivers/clk/sunxi/clk-sunxi.c
> index 27201fd26e44..faec99dc09c0 100644
> --- a/drivers/clk/sunxi/clk-sunxi.c
> +++ b/drivers/clk/sunxi/clk-sunxi.c
> @@ -311,7 +311,7 @@ static void sun6i_get_ahb1_factors(struct factors_request *req)
>
> calcm = DIV_ROUND_UP(div, 1 << calcp);
> } else {
> - calcp = __roundup_pow_of_two(div);
> + calcp = roundup_pow_of_two(div);
> calcp = calcp > 3 ? 3 : calcp;
> }
>
> diff --git a/drivers/infiniband/hw/hfi1/chip.c b/drivers/infiniband/hw/hfi1/chip.c
> index 9b1fb84a3d45..96b1d343c32f 100644
> --- a/drivers/infiniband/hw/hfi1/chip.c
> +++ b/drivers/infiniband/hw/hfi1/chip.c
> @@ -14199,10 +14199,10 @@ static int qos_rmt_entries(struct hfi1_devdata *dd, unsigned int *mp,
> max_by_vl = krcvqs[i];
> if (max_by_vl > 32)
> goto no_qos;
> - m = ilog2(__roundup_pow_of_two(max_by_vl));
> + m = ilog2(roundup_pow_of_two(max_by_vl));
>
> /* determine bits for vl */
> - n = ilog2(__roundup_pow_of_two(num_vls));
> + n = ilog2(roundup_pow_of_two(num_vls));
>
> /* reject if too much is used */
> if ((m + n) > 7)
> diff --git a/drivers/infiniband/hw/hfi1/init.c b/drivers/infiniband/hw/hfi1/init.c
> index 26b792bb1027..838c789c7cce 100644
> --- a/drivers/infiniband/hw/hfi1/init.c
> +++ b/drivers/infiniband/hw/hfi1/init.c
> @@ -467,7 +467,7 @@ int hfi1_create_ctxtdata(struct hfi1_pportdata *ppd, int numa,
> * MTU supported.
> */
> if (rcd->egrbufs.size < hfi1_max_mtu) {
> - rcd->egrbufs.size = __roundup_pow_of_two(hfi1_max_mtu);
> + rcd->egrbufs.size = roundup_pow_of_two(hfi1_max_mtu);
> hfi1_cdbg(PROC,
> "ctxt%u: eager bufs size too small. Adjusting to %u\n",
> rcd->ctxt, rcd->egrbufs.size);
> @@ -1959,7 +1959,7 @@ int hfi1_setup_eagerbufs(struct hfi1_ctxtdata *rcd)
> * to satisfy the "multiple of 8 RcvArray entries" requirement.
> */
> if (rcd->egrbufs.size <= (1 << 20))
> - rcd->egrbufs.rcvtid_size = max((unsigned long)round_mtu,
> + rcd->egrbufs.rcvtid_size = max((unsigned long long)round_mtu,
> rounddown_pow_of_two(rcd->egrbufs.size / 8));
>
> while (alloced_bytes < rcd->egrbufs.size &&
> diff --git a/drivers/infiniband/hw/mlx4/srq.c b/drivers/infiniband/hw/mlx4/srq.c
> index 8dcf6e3d9ae2..7e685600a7b3 100644
> --- a/drivers/infiniband/hw/mlx4/srq.c
> +++ b/drivers/infiniband/hw/mlx4/srq.c
> @@ -96,7 +96,7 @@ int mlx4_ib_create_srq(struct ib_srq *ib_srq,
> srq->msrq.max = roundup_pow_of_two(init_attr->attr.max_wr + 1);
> srq->msrq.max_gs = init_attr->attr.max_sge;
>
> - desc_size = max(32UL,
> + desc_size = max(32ULL,
> roundup_pow_of_two(sizeof (struct mlx4_wqe_srq_next_seg) +
> srq->msrq.max_gs *
> sizeof (struct mlx4_wqe_data_seg)));
> diff --git a/drivers/infiniband/hw/mthca/mthca_srq.c b/drivers/infiniband/hw/mthca/mthca_srq.c
> index a85935ccce88..0c2e14b4142a 100644
> --- a/drivers/infiniband/hw/mthca/mthca_srq.c
> +++ b/drivers/infiniband/hw/mthca/mthca_srq.c
> @@ -225,7 +225,7 @@ int mthca_alloc_srq(struct mthca_dev *dev, struct mthca_pd *pd,
> else
> srq->max = srq->max + 1;
>
> - ds = max(64UL,
> + ds = max(64ULL,
> roundup_pow_of_two(sizeof (struct mthca_next_seg) +
> srq->max_gs * sizeof (struct mthca_data_seg)));
>
> diff --git a/drivers/infiniband/sw/rxe/rxe_qp.c b/drivers/infiniband/sw/rxe/rxe_qp.c
> index e2c6d1cedf41..040b707b0877 100644
> --- a/drivers/infiniband/sw/rxe/rxe_qp.c
> +++ b/drivers/infiniband/sw/rxe/rxe_qp.c
> @@ -592,7 +592,7 @@ int rxe_qp_from_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask,
> int err;
>
> if (mask & IB_QP_MAX_QP_RD_ATOMIC) {
> - int max_rd_atomic = __roundup_pow_of_two(attr->max_rd_atomic);
> + int max_rd_atomic = roundup_pow_of_two(attr->max_rd_atomic);
>
> qp->attr.max_rd_atomic = max_rd_atomic;
> atomic_set(&qp->req.rd_atomic, max_rd_atomic);
> @@ -600,7 +600,7 @@ int rxe_qp_from_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask,
>
> if (mask & IB_QP_MAX_DEST_RD_ATOMIC) {
> int max_dest_rd_atomic =
> - __roundup_pow_of_two(attr->max_dest_rd_atomic);
> + roundup_pow_of_two(attr->max_dest_rd_atomic);
>
> qp->attr.max_dest_rd_atomic = max_dest_rd_atomic;
>
> diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
> index 0c8d81f56a30..ce7c900bd666 100644
> --- a/drivers/iommu/intel-iommu.c
> +++ b/drivers/iommu/intel-iommu.c
> @@ -1488,7 +1488,7 @@ static void iommu_flush_iotlb_psi(struct intel_iommu *iommu,
> unsigned long pfn, unsigned int pages,
> int ih, int map)
> {
> - unsigned int mask = ilog2(__roundup_pow_of_two(pages));
> + unsigned int mask = ilog2(roundup_pow_of_two(pages));
> uint64_t addr = (uint64_t)pfn << VTD_PAGE_SHIFT;
> u16 did = domain->iommu_did[iommu->seq_id];
>
> @@ -3390,7 +3390,7 @@ static unsigned long intel_alloc_iova(struct device *dev,
> /* Restrict dma_mask to the width that the iommu can handle */
> dma_mask = min_t(uint64_t, DOMAIN_MAX_ADDR(domain->gaw), dma_mask);
> /* Ensure we reserve the whole size-aligned region */
> - nrpages = __roundup_pow_of_two(nrpages);
> + nrpages = roundup_pow_of_two(nrpages);
>
> if (!dmar_forcedac && dma_mask > DMA_BIT_MASK(32)) {
> /*
> diff --git a/drivers/iommu/intel-svm.c b/drivers/iommu/intel-svm.c
> index 9b159132405d..602caca3cd1a 100644
> --- a/drivers/iommu/intel-svm.c
> +++ b/drivers/iommu/intel-svm.c
> @@ -115,7 +115,7 @@ static void intel_flush_svm_range_dev (struct intel_svm *svm, struct intel_svm_d
> QI_EIOTLB_TYPE;
> desc.qw1 = 0;
> } else {
> - int mask = ilog2(__roundup_pow_of_two(pages));
> + int mask = ilog2(roundup_pow_of_two(pages));
>
> desc.qw0 = QI_EIOTLB_PASID(svm->pasid) |
> QI_EIOTLB_DID(sdev->did) |
> @@ -142,7 +142,7 @@ static void intel_flush_svm_range_dev (struct intel_svm *svm, struct intel_svm_d
> * for example, an "address" value of 0x12345f000 will
> * flush from 0x123440000 to 0x12347ffff (256KiB). */
> unsigned long last = address + ((unsigned long)(pages - 1) << VTD_PAGE_SHIFT);
> - unsigned long mask = __rounddown_pow_of_two(address ^ last);
> + unsigned long mask = rounddown_pow_of_two(address ^ last);
>
> desc.qw1 = QI_DEV_EIOTLB_ADDR((address & ~mask) |
> (mask - 1)) | QI_DEV_EIOTLB_SIZE;
> diff --git a/drivers/iommu/intel_irq_remapping.c b/drivers/iommu/intel_irq_remapping.c
> index 81e43c1df7ec..935657b2c661 100644
> --- a/drivers/iommu/intel_irq_remapping.c
> +++ b/drivers/iommu/intel_irq_remapping.c
> @@ -113,7 +113,7 @@ static int alloc_irte(struct intel_iommu *iommu,
> return -1;
>
> if (count > 1) {
> - count = __roundup_pow_of_two(count);
> + count = roundup_pow_of_two(count);
> mask = ilog2(count);
> }
>
> diff --git a/drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c b/drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c
> index 6a757dadb5f1..fd5b12c23eaa 100644
> --- a/drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c
> +++ b/drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c
> @@ -680,13 +680,13 @@ static int xgbe_set_ringparam(struct net_device *netdev,
> return -EINVAL;
> }
>
> - rx = __rounddown_pow_of_two(ringparam->rx_pending);
> + rx = rounddown_pow_of_two(ringparam->rx_pending);
> if (rx != ringparam->rx_pending)
> netdev_notice(netdev,
> "rx ring parameter rounded to power of two: %u\n",
> rx);
>
> - tx = __rounddown_pow_of_two(ringparam->tx_pending);
> + tx = rounddown_pow_of_two(ringparam->tx_pending);
> if (tx != ringparam->tx_pending)
> netdev_notice(netdev,
> "tx ring parameter rounded to power of two: %u\n",
> diff --git a/drivers/net/ethernet/marvell/sky2.c b/drivers/net/ethernet/marvell/sky2.c
> index 5f56ee83e3b1..cc3a03b4a611 100644
> --- a/drivers/net/ethernet/marvell/sky2.c
> +++ b/drivers/net/ethernet/marvell/sky2.c
> @@ -4139,7 +4139,7 @@ static int sky2_set_coalesce(struct net_device *dev,
> */
> static unsigned long roundup_ring_size(unsigned long pending)
> {
> - return max(128ul, roundup_pow_of_two(pending+1));
> + return max(128ull, roundup_pow_of_two(pending+1));
> }
>
> static void sky2_get_ringparam(struct net_device *dev,
> diff --git a/drivers/net/ethernet/rocker/rocker_hw.h b/drivers/net/ethernet/rocker/rocker_hw.h
> index 59f1f8b690d2..d8de15509e2c 100644
> --- a/drivers/net/ethernet/rocker/rocker_hw.h
> +++ b/drivers/net/ethernet/rocker/rocker_hw.h
> @@ -88,8 +88,8 @@ enum rocker_dma_type {
> };
>
> /* Rocker DMA ring size limits and default sizes */
> -#define ROCKER_DMA_SIZE_MIN 2ul
> -#define ROCKER_DMA_SIZE_MAX 65536ul
> +#define ROCKER_DMA_SIZE_MIN 2ull
> +#define ROCKER_DMA_SIZE_MAX 65536ull
> #define ROCKER_DMA_CMD_DEFAULT_SIZE 32ul
> #define ROCKER_DMA_EVENT_DEFAULT_SIZE 32ul
> #define ROCKER_DMA_TX_DEFAULT_SIZE 64ul
> diff --git a/drivers/net/ethernet/sfc/ef10.c b/drivers/net/ethernet/sfc/ef10.c
> index 4d9bbccc6f89..4f4d9a5b3b75 100644
> --- a/drivers/net/ethernet/sfc/ef10.c
> +++ b/drivers/net/ethernet/sfc/ef10.c
> @@ -27,7 +27,7 @@ enum {
> };
> /* The maximum size of a shared RSS context */
> /* TODO: this should really be from the mcdi protocol export */
> -#define EFX_EF10_MAX_SHARED_RSS_CONTEXT_SIZE 64UL
> +#define EFX_EF10_MAX_SHARED_RSS_CONTEXT_SIZE 64ULL
>
> /* The filter table(s) are managed by firmware and we have write-only
> * access. When removing filters we must identify them to the
> diff --git a/drivers/net/ethernet/sfc/efx.h b/drivers/net/ethernet/sfc/efx.h
> index 2dd8d5002315..fea2add5860e 100644
> --- a/drivers/net/ethernet/sfc/efx.h
> +++ b/drivers/net/ethernet/sfc/efx.h
> @@ -52,7 +52,7 @@ void efx_schedule_slow_fill(struct efx_rx_queue *rx_queue);
>
> #define EFX_MAX_DMAQ_SIZE 4096UL
> #define EFX_DEFAULT_DMAQ_SIZE 1024UL
> -#define EFX_MIN_DMAQ_SIZE 512UL
> +#define EFX_MIN_DMAQ_SIZE 512ULL
>
> #define EFX_MAX_EVQ_SIZE 16384UL
> #define EFX_MIN_EVQ_SIZE 512UL
> diff --git a/drivers/net/ethernet/sfc/falcon/efx.h b/drivers/net/ethernet/sfc/falcon/efx.h
> index d3b4646545fa..0d16257156d6 100644
> --- a/drivers/net/ethernet/sfc/falcon/efx.h
> +++ b/drivers/net/ethernet/sfc/falcon/efx.h
> @@ -55,7 +55,7 @@ void ef4_schedule_slow_fill(struct ef4_rx_queue *rx_queue);
>
> #define EF4_MAX_DMAQ_SIZE 4096UL
> #define EF4_DEFAULT_DMAQ_SIZE 1024UL
> -#define EF4_MIN_DMAQ_SIZE 512UL
> +#define EF4_MIN_DMAQ_SIZE 512ULL
>
> #define EF4_MAX_EVQ_SIZE 16384UL
> #define EF4_MIN_EVQ_SIZE 512UL
> diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c
> index c7709e49f0e4..f0391e88bc42 100644
> --- a/drivers/pci/msi.c
> +++ b/drivers/pci/msi.c
> @@ -578,7 +578,7 @@ msi_setup_entry(struct pci_dev *dev, int nvec, struct irq_affinity *affd)
> entry->msi_attrib.maskbit = !!(control & PCI_MSI_FLAGS_MASKBIT);
> entry->msi_attrib.default_irq = dev->irq; /* Save IOAPIC IRQ */
> entry->msi_attrib.multi_cap = (control & PCI_MSI_FLAGS_QMASK) >> 1;
> - entry->msi_attrib.multiple = ilog2(__roundup_pow_of_two(nvec));
> + entry->msi_attrib.multiple = ilog2(roundup_pow_of_two(nvec));
>
> if (control & PCI_MSI_FLAGS_64BIT)
> entry->mask_pos = dev->msi_cap + PCI_MSI_MASK_64;
> diff --git a/include/linux/log2.h b/include/linux/log2.h
> index 83a4a3ca3e8a..53a727303dac 100644
> --- a/include/linux/log2.h
> +++ b/include/linux/log2.h
> @@ -47,26 +47,6 @@ bool is_power_of_2(unsigned long n)
> return (n != 0 && ((n & (n - 1)) == 0));
> }
>
> -/**
> - * __roundup_pow_of_two() - round up to nearest power of two
> - * @n: value to round up
> - */
> -static inline __attribute__((const))
> -unsigned long __roundup_pow_of_two(unsigned long n)
> -{
> - return 1UL << fls_long(n - 1);
> -}
> -
> -/**
> - * __rounddown_pow_of_two() - round down to nearest power of two
> - * @n: value to round down
> - */
> -static inline __attribute__((const))
> -unsigned long __rounddown_pow_of_two(unsigned long n)
> -{
> - return 1UL << (fls_long(n) - 1);
> -}
> -
> /**
> * const_ilog2 - log base 2 of 32-bit or a 64-bit constant unsigned value
> * @n: parameter
> @@ -170,14 +150,11 @@ unsigned long __rounddown_pow_of_two(unsigned long n)
> * - the result is undefined when n == 0
> * - this can be used to initialise global variables from constant data
> */
> -#define roundup_pow_of_two(n) \
> -( \
> - __builtin_constant_p(n) ? ( \
> - (n == 1) ? 1 : \
> - (1UL << (ilog2((n) - 1) + 1)) \
> - ) : \
> - __roundup_pow_of_two(n) \
> - )
> +#define roundup_pow_of_two(n) \
> +( \
> + (__builtin_constant_p(n) && ((n) == 1)) ? \
> + 1 : (1ULL << (ilog2((n) - 1) + 1)) \
> +)
>
> /**
> * rounddown_pow_of_two - round the given value down to nearest power of two
> @@ -187,12 +164,11 @@ unsigned long __rounddown_pow_of_two(unsigned long n)
> * - the result is undefined when n == 0
> * - this can be used to initialise global variables from constant data
> */
> -#define rounddown_pow_of_two(n) \
> -( \
> - __builtin_constant_p(n) ? ( \
> - (1UL << ilog2(n))) : \
> - __rounddown_pow_of_two(n) \
> - )
> +#define rounddown_pow_of_two(n) \
> +( \
> + (__builtin_constant_p(n) && ((n) == 1)) ? \
> + 1 : (1ULL << (ilog2(n))) \
> +)
>
> static inline __attribute_const__
> int __order_base_2(unsigned long n)
> diff --git a/kernel/kexec_core.c b/kernel/kexec_core.c
> index 15d70a90b50d..bb9efc6944a4 100644
> --- a/kernel/kexec_core.c
> +++ b/kernel/kexec_core.c
> @@ -1094,7 +1094,8 @@ static int __init crash_notes_memory_init(void)
> * crash_notes is allocated inside one physical page.
> */
> size = sizeof(note_buf_t);
> - align = min(roundup_pow_of_two(sizeof(note_buf_t)), PAGE_SIZE);
> + align = min(roundup_pow_of_two(sizeof(note_buf_t)),
> + (unsigned long long)PAGE_SIZE);
>
> /*
> * Break compile if size is bigger than PAGE_SIZE since crash_notes
> diff --git a/lib/rhashtable.c b/lib/rhashtable.c
> index bdb7e4cadf05..70908678c7a8 100644
> --- a/lib/rhashtable.c
> +++ b/lib/rhashtable.c
> @@ -950,7 +950,7 @@ static size_t rounded_hashtable_size(const struct rhashtable_params *params)
>
> if (params->nelem_hint)
> retsize = max(roundup_pow_of_two(params->nelem_hint * 4 / 3),
> - (unsigned long)params->min_size);
> + (unsigned long long)params->min_size);
> else
> retsize = max(HASH_DEFAULT_SIZE,
> (unsigned long)params->min_size);
> diff --git a/net/sunrpc/xprtrdma/verbs.c b/net/sunrpc/xprtrdma/verbs.c
> index 77c7dd7f05e8..78fb8ccabddd 100644
> --- a/net/sunrpc/xprtrdma/verbs.c
> +++ b/net/sunrpc/xprtrdma/verbs.c
> @@ -1015,7 +1015,7 @@ struct rpcrdma_req *rpcrdma_req_create(struct rpcrdma_xprt *r_xprt, size_t size,
> maxhdrsize = rpcrdma_fixed_maxsz + 3 +
> r_xprt->rx_ia.ri_max_segs * rpcrdma_readchunk_maxsz;
> maxhdrsize *= sizeof(__be32);
> - rb = rpcrdma_regbuf_alloc(__roundup_pow_of_two(maxhdrsize),
> + rb = rpcrdma_regbuf_alloc(roundup_pow_of_two(maxhdrsize),
> DMA_TO_DEVICE, flags);
> if (!rb)
> goto out2;
For the xprtrdma chunk:
Reviewed-by: Chuck Lever <chuck.lever@oracle.com>
--
Chuck Lever
_______________________________________________
kexec mailing list
kexec@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/kexec
^ permalink raw reply [flat|nested] 71+ messages in thread
* Re: [PATCH v4 7/8] linux/log2.h: Fix 64bit calculations in roundup/down_pow_two()
2019-12-03 11:47 ` Nicolas Saenz Julienne
(?)
(?)
@ 2019-12-04 10:56 ` Martin Habets
-1 siblings, 0 replies; 71+ messages in thread
From: Martin Habets @ 2019-12-04 10:56 UTC (permalink / raw)
To: Nicolas Saenz Julienne, andrew.murray, maz, linux-kernel,
Michael Turquette, Stephen Boyd, Emilio López,
Maxime Ripard, Chen-Yu Tsai, Mike Marciniszyn,
Dennis Dalessandro, Yishai Hadas, Moni Shoua, David Woodhouse,
Lu Baolu, Joerg Roedel, Tom Lendacky, Mirko Lindner,
Stephen Hemminger, Jiri Pirko, Solarflare linux maintainers,
Edward Cree, Bjorn Helgaas, Eric Biederman, Thomas Graf,
Herbert Xu
Cc: james.quinlan, mbrugger, f.fainelli, phil, wahrenst,
jeremy.linton, linux-pci, linux-rpi-kernel, Robin Murphy,
Doug Ledford, Jason Gunthorpe, David S. Miller, Trond Myklebust,
Anna Schumaker, J. Bruce Fields, Chuck Lever, linux-clk,
linux-arm-kernel, linux-rdma, iommu, netdev, kexec, linux-nfs
For the changes under drivers/net/ethernet/sfc:
Reviewed-by: Martin Habets <mhabets@solarflare.com>
On 03/12/2019 11:47, Nicolas Saenz Julienne wrote:
> Some users need to make sure their rounding function accepts and returns
> 64bit long variables regardless of the architecture. Sadly
> roundup/rounddown_pow_two() takes and returns unsigned longs. It turns
> out ilog2() already handles 32/64bit calculations properly, and being
> the building block to the round functions we can rework them as a
> wrapper around it.
>
> Suggested-by: Robin Murphy <robin.murphy@arm.con>
> Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
> ---
> drivers/clk/clk-divider.c | 8 ++--
> drivers/clk/sunxi/clk-sunxi.c | 2 +-
> drivers/infiniband/hw/hfi1/chip.c | 4 +-
> drivers/infiniband/hw/hfi1/init.c | 4 +-
> drivers/infiniband/hw/mlx4/srq.c | 2 +-
> drivers/infiniband/hw/mthca/mthca_srq.c | 2 +-
> drivers/infiniband/sw/rxe/rxe_qp.c | 4 +-
> drivers/iommu/intel-iommu.c | 4 +-
> drivers/iommu/intel-svm.c | 4 +-
> drivers/iommu/intel_irq_remapping.c | 2 +-
> drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c | 4 +-
> drivers/net/ethernet/marvell/sky2.c | 2 +-
> drivers/net/ethernet/rocker/rocker_hw.h | 4 +-
> drivers/net/ethernet/sfc/ef10.c | 2 +-
> drivers/net/ethernet/sfc/efx.h | 2 +-
> drivers/net/ethernet/sfc/falcon/efx.h | 2 +-
> drivers/pci/msi.c | 2 +-
> include/linux/log2.h | 44 +++++---------------
> kernel/kexec_core.c | 3 +-
> lib/rhashtable.c | 2 +-
> net/sunrpc/xprtrdma/verbs.c | 2 +-
> 21 files changed, 41 insertions(+), 64 deletions(-)
>
> diff --git a/drivers/clk/clk-divider.c b/drivers/clk/clk-divider.c
> index 098b2b01f0af..ba947e4c8193 100644
> --- a/drivers/clk/clk-divider.c
> +++ b/drivers/clk/clk-divider.c
> @@ -222,7 +222,7 @@ static int _div_round_up(const struct clk_div_table *table,
> int div = DIV_ROUND_UP_ULL((u64)parent_rate, rate);
>
> if (flags & CLK_DIVIDER_POWER_OF_TWO)
> - div = __roundup_pow_of_two(div);
> + div = roundup_pow_of_two(div);
> if (table)
> div = _round_up_table(table, div);
>
> @@ -240,8 +240,8 @@ static int _div_round_closest(const struct clk_div_table *table,
> down = parent_rate / rate;
>
> if (flags & CLK_DIVIDER_POWER_OF_TWO) {
> - up = __roundup_pow_of_two(up);
> - down = __rounddown_pow_of_two(down);
> + up = roundup_pow_of_two(up);
> + down = rounddown_pow_of_two(down);
> } else if (table) {
> up = _round_up_table(table, up);
> down = _round_down_table(table, down);
> @@ -278,7 +278,7 @@ static int _next_div(const struct clk_div_table *table, int div,
> div++;
>
> if (flags & CLK_DIVIDER_POWER_OF_TWO)
> - return __roundup_pow_of_two(div);
> + return roundup_pow_of_two(div);
> if (table)
> return _round_up_table(table, div);
>
> diff --git a/drivers/clk/sunxi/clk-sunxi.c b/drivers/clk/sunxi/clk-sunxi.c
> index 27201fd26e44..faec99dc09c0 100644
> --- a/drivers/clk/sunxi/clk-sunxi.c
> +++ b/drivers/clk/sunxi/clk-sunxi.c
> @@ -311,7 +311,7 @@ static void sun6i_get_ahb1_factors(struct factors_request *req)
>
> calcm = DIV_ROUND_UP(div, 1 << calcp);
> } else {
> - calcp = __roundup_pow_of_two(div);
> + calcp = roundup_pow_of_two(div);
> calcp = calcp > 3 ? 3 : calcp;
> }
>
> diff --git a/drivers/infiniband/hw/hfi1/chip.c b/drivers/infiniband/hw/hfi1/chip.c
> index 9b1fb84a3d45..96b1d343c32f 100644
> --- a/drivers/infiniband/hw/hfi1/chip.c
> +++ b/drivers/infiniband/hw/hfi1/chip.c
> @@ -14199,10 +14199,10 @@ static int qos_rmt_entries(struct hfi1_devdata *dd, unsigned int *mp,
> max_by_vl = krcvqs[i];
> if (max_by_vl > 32)
> goto no_qos;
> - m = ilog2(__roundup_pow_of_two(max_by_vl));
> + m = ilog2(roundup_pow_of_two(max_by_vl));
>
> /* determine bits for vl */
> - n = ilog2(__roundup_pow_of_two(num_vls));
> + n = ilog2(roundup_pow_of_two(num_vls));
>
> /* reject if too much is used */
> if ((m + n) > 7)
> diff --git a/drivers/infiniband/hw/hfi1/init.c b/drivers/infiniband/hw/hfi1/init.c
> index 26b792bb1027..838c789c7cce 100644
> --- a/drivers/infiniband/hw/hfi1/init.c
> +++ b/drivers/infiniband/hw/hfi1/init.c
> @@ -467,7 +467,7 @@ int hfi1_create_ctxtdata(struct hfi1_pportdata *ppd, int numa,
> * MTU supported.
> */
> if (rcd->egrbufs.size < hfi1_max_mtu) {
> - rcd->egrbufs.size = __roundup_pow_of_two(hfi1_max_mtu);
> + rcd->egrbufs.size = roundup_pow_of_two(hfi1_max_mtu);
> hfi1_cdbg(PROC,
> "ctxt%u: eager bufs size too small. Adjusting to %u\n",
> rcd->ctxt, rcd->egrbufs.size);
> @@ -1959,7 +1959,7 @@ int hfi1_setup_eagerbufs(struct hfi1_ctxtdata *rcd)
> * to satisfy the "multiple of 8 RcvArray entries" requirement.
> */
> if (rcd->egrbufs.size <= (1 << 20))
> - rcd->egrbufs.rcvtid_size = max((unsigned long)round_mtu,
> + rcd->egrbufs.rcvtid_size = max((unsigned long long)round_mtu,
> rounddown_pow_of_two(rcd->egrbufs.size / 8));
>
> while (alloced_bytes < rcd->egrbufs.size &&
> diff --git a/drivers/infiniband/hw/mlx4/srq.c b/drivers/infiniband/hw/mlx4/srq.c
> index 8dcf6e3d9ae2..7e685600a7b3 100644
> --- a/drivers/infiniband/hw/mlx4/srq.c
> +++ b/drivers/infiniband/hw/mlx4/srq.c
> @@ -96,7 +96,7 @@ int mlx4_ib_create_srq(struct ib_srq *ib_srq,
> srq->msrq.max = roundup_pow_of_two(init_attr->attr.max_wr + 1);
> srq->msrq.max_gs = init_attr->attr.max_sge;
>
> - desc_size = max(32UL,
> + desc_size = max(32ULL,
> roundup_pow_of_two(sizeof (struct mlx4_wqe_srq_next_seg) +
> srq->msrq.max_gs *
> sizeof (struct mlx4_wqe_data_seg)));
> diff --git a/drivers/infiniband/hw/mthca/mthca_srq.c b/drivers/infiniband/hw/mthca/mthca_srq.c
> index a85935ccce88..0c2e14b4142a 100644
> --- a/drivers/infiniband/hw/mthca/mthca_srq.c
> +++ b/drivers/infiniband/hw/mthca/mthca_srq.c
> @@ -225,7 +225,7 @@ int mthca_alloc_srq(struct mthca_dev *dev, struct mthca_pd *pd,
> else
> srq->max = srq->max + 1;
>
> - ds = max(64UL,
> + ds = max(64ULL,
> roundup_pow_of_two(sizeof (struct mthca_next_seg) +
> srq->max_gs * sizeof (struct mthca_data_seg)));
>
> diff --git a/drivers/infiniband/sw/rxe/rxe_qp.c b/drivers/infiniband/sw/rxe/rxe_qp.c
> index e2c6d1cedf41..040b707b0877 100644
> --- a/drivers/infiniband/sw/rxe/rxe_qp.c
> +++ b/drivers/infiniband/sw/rxe/rxe_qp.c
> @@ -592,7 +592,7 @@ int rxe_qp_from_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask,
> int err;
>
> if (mask & IB_QP_MAX_QP_RD_ATOMIC) {
> - int max_rd_atomic = __roundup_pow_of_two(attr->max_rd_atomic);
> + int max_rd_atomic = roundup_pow_of_two(attr->max_rd_atomic);
>
> qp->attr.max_rd_atomic = max_rd_atomic;
> atomic_set(&qp->req.rd_atomic, max_rd_atomic);
> @@ -600,7 +600,7 @@ int rxe_qp_from_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask,
>
> if (mask & IB_QP_MAX_DEST_RD_ATOMIC) {
> int max_dest_rd_atomic =
> - __roundup_pow_of_two(attr->max_dest_rd_atomic);
> + roundup_pow_of_two(attr->max_dest_rd_atomic);
>
> qp->attr.max_dest_rd_atomic = max_dest_rd_atomic;
>
> diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
> index 0c8d81f56a30..ce7c900bd666 100644
> --- a/drivers/iommu/intel-iommu.c
> +++ b/drivers/iommu/intel-iommu.c
> @@ -1488,7 +1488,7 @@ static void iommu_flush_iotlb_psi(struct intel_iommu *iommu,
> unsigned long pfn, unsigned int pages,
> int ih, int map)
> {
> - unsigned int mask = ilog2(__roundup_pow_of_two(pages));
> + unsigned int mask = ilog2(roundup_pow_of_two(pages));
> uint64_t addr = (uint64_t)pfn << VTD_PAGE_SHIFT;
> u16 did = domain->iommu_did[iommu->seq_id];
>
> @@ -3390,7 +3390,7 @@ static unsigned long intel_alloc_iova(struct device *dev,
> /* Restrict dma_mask to the width that the iommu can handle */
> dma_mask = min_t(uint64_t, DOMAIN_MAX_ADDR(domain->gaw), dma_mask);
> /* Ensure we reserve the whole size-aligned region */
> - nrpages = __roundup_pow_of_two(nrpages);
> + nrpages = roundup_pow_of_two(nrpages);
>
> if (!dmar_forcedac && dma_mask > DMA_BIT_MASK(32)) {
> /*
> diff --git a/drivers/iommu/intel-svm.c b/drivers/iommu/intel-svm.c
> index 9b159132405d..602caca3cd1a 100644
> --- a/drivers/iommu/intel-svm.c
> +++ b/drivers/iommu/intel-svm.c
> @@ -115,7 +115,7 @@ static void intel_flush_svm_range_dev (struct intel_svm *svm, struct intel_svm_d
> QI_EIOTLB_TYPE;
> desc.qw1 = 0;
> } else {
> - int mask = ilog2(__roundup_pow_of_two(pages));
> + int mask = ilog2(roundup_pow_of_two(pages));
>
> desc.qw0 = QI_EIOTLB_PASID(svm->pasid) |
> QI_EIOTLB_DID(sdev->did) |
> @@ -142,7 +142,7 @@ static void intel_flush_svm_range_dev (struct intel_svm *svm, struct intel_svm_d
> * for example, an "address" value of 0x12345f000 will
> * flush from 0x123440000 to 0x12347ffff (256KiB). */
> unsigned long last = address + ((unsigned long)(pages - 1) << VTD_PAGE_SHIFT);
> - unsigned long mask = __rounddown_pow_of_two(address ^ last);
> + unsigned long mask = rounddown_pow_of_two(address ^ last);
>
> desc.qw1 = QI_DEV_EIOTLB_ADDR((address & ~mask) |
> (mask - 1)) | QI_DEV_EIOTLB_SIZE;
> diff --git a/drivers/iommu/intel_irq_remapping.c b/drivers/iommu/intel_irq_remapping.c
> index 81e43c1df7ec..935657b2c661 100644
> --- a/drivers/iommu/intel_irq_remapping.c
> +++ b/drivers/iommu/intel_irq_remapping.c
> @@ -113,7 +113,7 @@ static int alloc_irte(struct intel_iommu *iommu,
> return -1;
>
> if (count > 1) {
> - count = __roundup_pow_of_two(count);
> + count = roundup_pow_of_two(count);
> mask = ilog2(count);
> }
>
> diff --git a/drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c b/drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c
> index 6a757dadb5f1..fd5b12c23eaa 100644
> --- a/drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c
> +++ b/drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c
> @@ -680,13 +680,13 @@ static int xgbe_set_ringparam(struct net_device *netdev,
> return -EINVAL;
> }
>
> - rx = __rounddown_pow_of_two(ringparam->rx_pending);
> + rx = rounddown_pow_of_two(ringparam->rx_pending);
> if (rx != ringparam->rx_pending)
> netdev_notice(netdev,
> "rx ring parameter rounded to power of two: %u\n",
> rx);
>
> - tx = __rounddown_pow_of_two(ringparam->tx_pending);
> + tx = rounddown_pow_of_two(ringparam->tx_pending);
> if (tx != ringparam->tx_pending)
> netdev_notice(netdev,
> "tx ring parameter rounded to power of two: %u\n",
> diff --git a/drivers/net/ethernet/marvell/sky2.c b/drivers/net/ethernet/marvell/sky2.c
> index 5f56ee83e3b1..cc3a03b4a611 100644
> --- a/drivers/net/ethernet/marvell/sky2.c
> +++ b/drivers/net/ethernet/marvell/sky2.c
> @@ -4139,7 +4139,7 @@ static int sky2_set_coalesce(struct net_device *dev,
> */
> static unsigned long roundup_ring_size(unsigned long pending)
> {
> - return max(128ul, roundup_pow_of_two(pending+1));
> + return max(128ull, roundup_pow_of_two(pending+1));
> }
>
> static void sky2_get_ringparam(struct net_device *dev,
> diff --git a/drivers/net/ethernet/rocker/rocker_hw.h b/drivers/net/ethernet/rocker/rocker_hw.h
> index 59f1f8b690d2..d8de15509e2c 100644
> --- a/drivers/net/ethernet/rocker/rocker_hw.h
> +++ b/drivers/net/ethernet/rocker/rocker_hw.h
> @@ -88,8 +88,8 @@ enum rocker_dma_type {
> };
>
> /* Rocker DMA ring size limits and default sizes */
> -#define ROCKER_DMA_SIZE_MIN 2ul
> -#define ROCKER_DMA_SIZE_MAX 65536ul
> +#define ROCKER_DMA_SIZE_MIN 2ull
> +#define ROCKER_DMA_SIZE_MAX 65536ull
> #define ROCKER_DMA_CMD_DEFAULT_SIZE 32ul
> #define ROCKER_DMA_EVENT_DEFAULT_SIZE 32ul
> #define ROCKER_DMA_TX_DEFAULT_SIZE 64ul
> diff --git a/drivers/net/ethernet/sfc/ef10.c b/drivers/net/ethernet/sfc/ef10.c
> index 4d9bbccc6f89..4f4d9a5b3b75 100644
> --- a/drivers/net/ethernet/sfc/ef10.c
> +++ b/drivers/net/ethernet/sfc/ef10.c
> @@ -27,7 +27,7 @@ enum {
> };
> /* The maximum size of a shared RSS context */
> /* TODO: this should really be from the mcdi protocol export */
> -#define EFX_EF10_MAX_SHARED_RSS_CONTEXT_SIZE 64UL
> +#define EFX_EF10_MAX_SHARED_RSS_CONTEXT_SIZE 64ULL
>
> /* The filter table(s) are managed by firmware and we have write-only
> * access. When removing filters we must identify them to the
> diff --git a/drivers/net/ethernet/sfc/efx.h b/drivers/net/ethernet/sfc/efx.h
> index 2dd8d5002315..fea2add5860e 100644
> --- a/drivers/net/ethernet/sfc/efx.h
> +++ b/drivers/net/ethernet/sfc/efx.h
> @@ -52,7 +52,7 @@ void efx_schedule_slow_fill(struct efx_rx_queue *rx_queue);
>
> #define EFX_MAX_DMAQ_SIZE 4096UL
> #define EFX_DEFAULT_DMAQ_SIZE 1024UL
> -#define EFX_MIN_DMAQ_SIZE 512UL
> +#define EFX_MIN_DMAQ_SIZE 512ULL
>
> #define EFX_MAX_EVQ_SIZE 16384UL
> #define EFX_MIN_EVQ_SIZE 512UL
> diff --git a/drivers/net/ethernet/sfc/falcon/efx.h b/drivers/net/ethernet/sfc/falcon/efx.h
> index d3b4646545fa..0d16257156d6 100644
> --- a/drivers/net/ethernet/sfc/falcon/efx.h
> +++ b/drivers/net/ethernet/sfc/falcon/efx.h
> @@ -55,7 +55,7 @@ void ef4_schedule_slow_fill(struct ef4_rx_queue *rx_queue);
>
> #define EF4_MAX_DMAQ_SIZE 4096UL
> #define EF4_DEFAULT_DMAQ_SIZE 1024UL
> -#define EF4_MIN_DMAQ_SIZE 512UL
> +#define EF4_MIN_DMAQ_SIZE 512ULL
>
> #define EF4_MAX_EVQ_SIZE 16384UL
> #define EF4_MIN_EVQ_SIZE 512UL
> diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c
> index c7709e49f0e4..f0391e88bc42 100644
> --- a/drivers/pci/msi.c
> +++ b/drivers/pci/msi.c
> @@ -578,7 +578,7 @@ msi_setup_entry(struct pci_dev *dev, int nvec, struct irq_affinity *affd)
> entry->msi_attrib.maskbit = !!(control & PCI_MSI_FLAGS_MASKBIT);
> entry->msi_attrib.default_irq = dev->irq; /* Save IOAPIC IRQ */
> entry->msi_attrib.multi_cap = (control & PCI_MSI_FLAGS_QMASK) >> 1;
> - entry->msi_attrib.multiple = ilog2(__roundup_pow_of_two(nvec));
> + entry->msi_attrib.multiple = ilog2(roundup_pow_of_two(nvec));
>
> if (control & PCI_MSI_FLAGS_64BIT)
> entry->mask_pos = dev->msi_cap + PCI_MSI_MASK_64;
> diff --git a/include/linux/log2.h b/include/linux/log2.h
> index 83a4a3ca3e8a..53a727303dac 100644
> --- a/include/linux/log2.h
> +++ b/include/linux/log2.h
> @@ -47,26 +47,6 @@ bool is_power_of_2(unsigned long n)
> return (n != 0 && ((n & (n - 1)) == 0));
> }
>
> -/**
> - * __roundup_pow_of_two() - round up to nearest power of two
> - * @n: value to round up
> - */
> -static inline __attribute__((const))
> -unsigned long __roundup_pow_of_two(unsigned long n)
> -{
> - return 1UL << fls_long(n - 1);
> -}
> -
> -/**
> - * __rounddown_pow_of_two() - round down to nearest power of two
> - * @n: value to round down
> - */
> -static inline __attribute__((const))
> -unsigned long __rounddown_pow_of_two(unsigned long n)
> -{
> - return 1UL << (fls_long(n) - 1);
> -}
> -
> /**
> * const_ilog2 - log base 2 of 32-bit or a 64-bit constant unsigned value
> * @n: parameter
> @@ -170,14 +150,11 @@ unsigned long __rounddown_pow_of_two(unsigned long n)
> * - the result is undefined when n == 0
> * - this can be used to initialise global variables from constant data
> */
> -#define roundup_pow_of_two(n) \
> -( \
> - __builtin_constant_p(n) ? ( \
> - (n == 1) ? 1 : \
> - (1UL << (ilog2((n) - 1) + 1)) \
> - ) : \
> - __roundup_pow_of_two(n) \
> - )
> +#define roundup_pow_of_two(n) \
> +( \
> + (__builtin_constant_p(n) && ((n) == 1)) ? \
> + 1 : (1ULL << (ilog2((n) - 1) + 1)) \
> +)
>
> /**
> * rounddown_pow_of_two - round the given value down to nearest power of two
> @@ -187,12 +164,11 @@ unsigned long __rounddown_pow_of_two(unsigned long n)
> * - the result is undefined when n == 0
> * - this can be used to initialise global variables from constant data
> */
> -#define rounddown_pow_of_two(n) \
> -( \
> - __builtin_constant_p(n) ? ( \
> - (1UL << ilog2(n))) : \
> - __rounddown_pow_of_two(n) \
> - )
> +#define rounddown_pow_of_two(n) \
> +( \
> + (__builtin_constant_p(n) && ((n) == 1)) ? \
> + 1 : (1ULL << (ilog2(n))) \
> +)
>
> static inline __attribute_const__
> int __order_base_2(unsigned long n)
> diff --git a/kernel/kexec_core.c b/kernel/kexec_core.c
> index 15d70a90b50d..bb9efc6944a4 100644
> --- a/kernel/kexec_core.c
> +++ b/kernel/kexec_core.c
> @@ -1094,7 +1094,8 @@ static int __init crash_notes_memory_init(void)
> * crash_notes is allocated inside one physical page.
> */
> size = sizeof(note_buf_t);
> - align = min(roundup_pow_of_two(sizeof(note_buf_t)), PAGE_SIZE);
> + align = min(roundup_pow_of_two(sizeof(note_buf_t)),
> + (unsigned long long)PAGE_SIZE);
>
> /*
> * Break compile if size is bigger than PAGE_SIZE since crash_notes
> diff --git a/lib/rhashtable.c b/lib/rhashtable.c
> index bdb7e4cadf05..70908678c7a8 100644
> --- a/lib/rhashtable.c
> +++ b/lib/rhashtable.c
> @@ -950,7 +950,7 @@ static size_t rounded_hashtable_size(const struct rhashtable_params *params)
>
> if (params->nelem_hint)
> retsize = max(roundup_pow_of_two(params->nelem_hint * 4 / 3),
> - (unsigned long)params->min_size);
> + (unsigned long long)params->min_size);
> else
> retsize = max(HASH_DEFAULT_SIZE,
> (unsigned long)params->min_size);
> diff --git a/net/sunrpc/xprtrdma/verbs.c b/net/sunrpc/xprtrdma/verbs.c
> index 77c7dd7f05e8..78fb8ccabddd 100644
> --- a/net/sunrpc/xprtrdma/verbs.c
> +++ b/net/sunrpc/xprtrdma/verbs.c
> @@ -1015,7 +1015,7 @@ struct rpcrdma_req *rpcrdma_req_create(struct rpcrdma_xprt *r_xprt, size_t size,
> maxhdrsize = rpcrdma_fixed_maxsz + 3 +
> r_xprt->rx_ia.ri_max_segs * rpcrdma_readchunk_maxsz;
> maxhdrsize *= sizeof(__be32);
> - rb = rpcrdma_regbuf_alloc(__roundup_pow_of_two(maxhdrsize),
> + rb = rpcrdma_regbuf_alloc(roundup_pow_of_two(maxhdrsize),
> DMA_TO_DEVICE, flags);
> if (!rb)
> goto out2;
>
^ permalink raw reply [flat|nested] 71+ messages in thread
* Re: [PATCH v4 7/8] linux/log2.h: Fix 64bit calculations in roundup/down_pow_two()
@ 2019-12-04 10:56 ` Martin Habets
0 siblings, 0 replies; 71+ messages in thread
From: Martin Habets @ 2019-12-04 10:56 UTC (permalink / raw)
To: Nicolas Saenz Julienne, andrew.murray, maz, linux-kernel,
Michael Turquette, Stephen Boyd, Emilio López,
Maxime Ripard, Chen-Yu Tsai, Mike Marciniszyn,
Dennis Dalessandro, Yishai Hadas, Moni Shoua, David Woodhouse,
Lu Baolu, Joerg Roedel, Tom Lendacky, Mirko Lindner,
Stephen Hemminger, Jiri Pirko, Solarflare linux maintainers,
Edward Cree, Bjorn Helgaas, Eric Biederman, Thomas Graf,
Herbert Xu
Cc: linux-pci, J. Bruce Fields, linux-clk, f.fainelli, linux-rdma,
phil, Jason Gunthorpe, Doug Ledford, linux-rpi-kernel,
Trond Myklebust, linux-arm-kernel, linux-nfs, mbrugger, netdev,
kexec, jeremy.linton, David S. Miller, iommu, Chuck Lever,
wahrenst, james.quinlan, Anna Schumaker, Robin Murphy
For the changes under drivers/net/ethernet/sfc:
Reviewed-by: Martin Habets <mhabets@solarflare.com>
On 03/12/2019 11:47, Nicolas Saenz Julienne wrote:
> Some users need to make sure their rounding function accepts and returns
> 64bit long variables regardless of the architecture. Sadly
> roundup/rounddown_pow_two() takes and returns unsigned longs. It turns
> out ilog2() already handles 32/64bit calculations properly, and being
> the building block to the round functions we can rework them as a
> wrapper around it.
>
> Suggested-by: Robin Murphy <robin.murphy@arm.con>
> Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
> ---
> drivers/clk/clk-divider.c | 8 ++--
> drivers/clk/sunxi/clk-sunxi.c | 2 +-
> drivers/infiniband/hw/hfi1/chip.c | 4 +-
> drivers/infiniband/hw/hfi1/init.c | 4 +-
> drivers/infiniband/hw/mlx4/srq.c | 2 +-
> drivers/infiniband/hw/mthca/mthca_srq.c | 2 +-
> drivers/infiniband/sw/rxe/rxe_qp.c | 4 +-
> drivers/iommu/intel-iommu.c | 4 +-
> drivers/iommu/intel-svm.c | 4 +-
> drivers/iommu/intel_irq_remapping.c | 2 +-
> drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c | 4 +-
> drivers/net/ethernet/marvell/sky2.c | 2 +-
> drivers/net/ethernet/rocker/rocker_hw.h | 4 +-
> drivers/net/ethernet/sfc/ef10.c | 2 +-
> drivers/net/ethernet/sfc/efx.h | 2 +-
> drivers/net/ethernet/sfc/falcon/efx.h | 2 +-
> drivers/pci/msi.c | 2 +-
> include/linux/log2.h | 44 +++++---------------
> kernel/kexec_core.c | 3 +-
> lib/rhashtable.c | 2 +-
> net/sunrpc/xprtrdma/verbs.c | 2 +-
> 21 files changed, 41 insertions(+), 64 deletions(-)
>
> diff --git a/drivers/clk/clk-divider.c b/drivers/clk/clk-divider.c
> index 098b2b01f0af..ba947e4c8193 100644
> --- a/drivers/clk/clk-divider.c
> +++ b/drivers/clk/clk-divider.c
> @@ -222,7 +222,7 @@ static int _div_round_up(const struct clk_div_table *table,
> int div = DIV_ROUND_UP_ULL((u64)parent_rate, rate);
>
> if (flags & CLK_DIVIDER_POWER_OF_TWO)
> - div = __roundup_pow_of_two(div);
> + div = roundup_pow_of_two(div);
> if (table)
> div = _round_up_table(table, div);
>
> @@ -240,8 +240,8 @@ static int _div_round_closest(const struct clk_div_table *table,
> down = parent_rate / rate;
>
> if (flags & CLK_DIVIDER_POWER_OF_TWO) {
> - up = __roundup_pow_of_two(up);
> - down = __rounddown_pow_of_two(down);
> + up = roundup_pow_of_two(up);
> + down = rounddown_pow_of_two(down);
> } else if (table) {
> up = _round_up_table(table, up);
> down = _round_down_table(table, down);
> @@ -278,7 +278,7 @@ static int _next_div(const struct clk_div_table *table, int div,
> div++;
>
> if (flags & CLK_DIVIDER_POWER_OF_TWO)
> - return __roundup_pow_of_two(div);
> + return roundup_pow_of_two(div);
> if (table)
> return _round_up_table(table, div);
>
> diff --git a/drivers/clk/sunxi/clk-sunxi.c b/drivers/clk/sunxi/clk-sunxi.c
> index 27201fd26e44..faec99dc09c0 100644
> --- a/drivers/clk/sunxi/clk-sunxi.c
> +++ b/drivers/clk/sunxi/clk-sunxi.c
> @@ -311,7 +311,7 @@ static void sun6i_get_ahb1_factors(struct factors_request *req)
>
> calcm = DIV_ROUND_UP(div, 1 << calcp);
> } else {
> - calcp = __roundup_pow_of_two(div);
> + calcp = roundup_pow_of_two(div);
> calcp = calcp > 3 ? 3 : calcp;
> }
>
> diff --git a/drivers/infiniband/hw/hfi1/chip.c b/drivers/infiniband/hw/hfi1/chip.c
> index 9b1fb84a3d45..96b1d343c32f 100644
> --- a/drivers/infiniband/hw/hfi1/chip.c
> +++ b/drivers/infiniband/hw/hfi1/chip.c
> @@ -14199,10 +14199,10 @@ static int qos_rmt_entries(struct hfi1_devdata *dd, unsigned int *mp,
> max_by_vl = krcvqs[i];
> if (max_by_vl > 32)
> goto no_qos;
> - m = ilog2(__roundup_pow_of_two(max_by_vl));
> + m = ilog2(roundup_pow_of_two(max_by_vl));
>
> /* determine bits for vl */
> - n = ilog2(__roundup_pow_of_two(num_vls));
> + n = ilog2(roundup_pow_of_two(num_vls));
>
> /* reject if too much is used */
> if ((m + n) > 7)
> diff --git a/drivers/infiniband/hw/hfi1/init.c b/drivers/infiniband/hw/hfi1/init.c
> index 26b792bb1027..838c789c7cce 100644
> --- a/drivers/infiniband/hw/hfi1/init.c
> +++ b/drivers/infiniband/hw/hfi1/init.c
> @@ -467,7 +467,7 @@ int hfi1_create_ctxtdata(struct hfi1_pportdata *ppd, int numa,
> * MTU supported.
> */
> if (rcd->egrbufs.size < hfi1_max_mtu) {
> - rcd->egrbufs.size = __roundup_pow_of_two(hfi1_max_mtu);
> + rcd->egrbufs.size = roundup_pow_of_two(hfi1_max_mtu);
> hfi1_cdbg(PROC,
> "ctxt%u: eager bufs size too small. Adjusting to %u\n",
> rcd->ctxt, rcd->egrbufs.size);
> @@ -1959,7 +1959,7 @@ int hfi1_setup_eagerbufs(struct hfi1_ctxtdata *rcd)
> * to satisfy the "multiple of 8 RcvArray entries" requirement.
> */
> if (rcd->egrbufs.size <= (1 << 20))
> - rcd->egrbufs.rcvtid_size = max((unsigned long)round_mtu,
> + rcd->egrbufs.rcvtid_size = max((unsigned long long)round_mtu,
> rounddown_pow_of_two(rcd->egrbufs.size / 8));
>
> while (alloced_bytes < rcd->egrbufs.size &&
> diff --git a/drivers/infiniband/hw/mlx4/srq.c b/drivers/infiniband/hw/mlx4/srq.c
> index 8dcf6e3d9ae2..7e685600a7b3 100644
> --- a/drivers/infiniband/hw/mlx4/srq.c
> +++ b/drivers/infiniband/hw/mlx4/srq.c
> @@ -96,7 +96,7 @@ int mlx4_ib_create_srq(struct ib_srq *ib_srq,
> srq->msrq.max = roundup_pow_of_two(init_attr->attr.max_wr + 1);
> srq->msrq.max_gs = init_attr->attr.max_sge;
>
> - desc_size = max(32UL,
> + desc_size = max(32ULL,
> roundup_pow_of_two(sizeof (struct mlx4_wqe_srq_next_seg) +
> srq->msrq.max_gs *
> sizeof (struct mlx4_wqe_data_seg)));
> diff --git a/drivers/infiniband/hw/mthca/mthca_srq.c b/drivers/infiniband/hw/mthca/mthca_srq.c
> index a85935ccce88..0c2e14b4142a 100644
> --- a/drivers/infiniband/hw/mthca/mthca_srq.c
> +++ b/drivers/infiniband/hw/mthca/mthca_srq.c
> @@ -225,7 +225,7 @@ int mthca_alloc_srq(struct mthca_dev *dev, struct mthca_pd *pd,
> else
> srq->max = srq->max + 1;
>
> - ds = max(64UL,
> + ds = max(64ULL,
> roundup_pow_of_two(sizeof (struct mthca_next_seg) +
> srq->max_gs * sizeof (struct mthca_data_seg)));
>
> diff --git a/drivers/infiniband/sw/rxe/rxe_qp.c b/drivers/infiniband/sw/rxe/rxe_qp.c
> index e2c6d1cedf41..040b707b0877 100644
> --- a/drivers/infiniband/sw/rxe/rxe_qp.c
> +++ b/drivers/infiniband/sw/rxe/rxe_qp.c
> @@ -592,7 +592,7 @@ int rxe_qp_from_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask,
> int err;
>
> if (mask & IB_QP_MAX_QP_RD_ATOMIC) {
> - int max_rd_atomic = __roundup_pow_of_two(attr->max_rd_atomic);
> + int max_rd_atomic = roundup_pow_of_two(attr->max_rd_atomic);
>
> qp->attr.max_rd_atomic = max_rd_atomic;
> atomic_set(&qp->req.rd_atomic, max_rd_atomic);
> @@ -600,7 +600,7 @@ int rxe_qp_from_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask,
>
> if (mask & IB_QP_MAX_DEST_RD_ATOMIC) {
> int max_dest_rd_atomic =
> - __roundup_pow_of_two(attr->max_dest_rd_atomic);
> + roundup_pow_of_two(attr->max_dest_rd_atomic);
>
> qp->attr.max_dest_rd_atomic = max_dest_rd_atomic;
>
> diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
> index 0c8d81f56a30..ce7c900bd666 100644
> --- a/drivers/iommu/intel-iommu.c
> +++ b/drivers/iommu/intel-iommu.c
> @@ -1488,7 +1488,7 @@ static void iommu_flush_iotlb_psi(struct intel_iommu *iommu,
> unsigned long pfn, unsigned int pages,
> int ih, int map)
> {
> - unsigned int mask = ilog2(__roundup_pow_of_two(pages));
> + unsigned int mask = ilog2(roundup_pow_of_two(pages));
> uint64_t addr = (uint64_t)pfn << VTD_PAGE_SHIFT;
> u16 did = domain->iommu_did[iommu->seq_id];
>
> @@ -3390,7 +3390,7 @@ static unsigned long intel_alloc_iova(struct device *dev,
> /* Restrict dma_mask to the width that the iommu can handle */
> dma_mask = min_t(uint64_t, DOMAIN_MAX_ADDR(domain->gaw), dma_mask);
> /* Ensure we reserve the whole size-aligned region */
> - nrpages = __roundup_pow_of_two(nrpages);
> + nrpages = roundup_pow_of_two(nrpages);
>
> if (!dmar_forcedac && dma_mask > DMA_BIT_MASK(32)) {
> /*
> diff --git a/drivers/iommu/intel-svm.c b/drivers/iommu/intel-svm.c
> index 9b159132405d..602caca3cd1a 100644
> --- a/drivers/iommu/intel-svm.c
> +++ b/drivers/iommu/intel-svm.c
> @@ -115,7 +115,7 @@ static void intel_flush_svm_range_dev (struct intel_svm *svm, struct intel_svm_d
> QI_EIOTLB_TYPE;
> desc.qw1 = 0;
> } else {
> - int mask = ilog2(__roundup_pow_of_two(pages));
> + int mask = ilog2(roundup_pow_of_two(pages));
>
> desc.qw0 = QI_EIOTLB_PASID(svm->pasid) |
> QI_EIOTLB_DID(sdev->did) |
> @@ -142,7 +142,7 @@ static void intel_flush_svm_range_dev (struct intel_svm *svm, struct intel_svm_d
> * for example, an "address" value of 0x12345f000 will
> * flush from 0x123440000 to 0x12347ffff (256KiB). */
> unsigned long last = address + ((unsigned long)(pages - 1) << VTD_PAGE_SHIFT);
> - unsigned long mask = __rounddown_pow_of_two(address ^ last);
> + unsigned long mask = rounddown_pow_of_two(address ^ last);
>
> desc.qw1 = QI_DEV_EIOTLB_ADDR((address & ~mask) |
> (mask - 1)) | QI_DEV_EIOTLB_SIZE;
> diff --git a/drivers/iommu/intel_irq_remapping.c b/drivers/iommu/intel_irq_remapping.c
> index 81e43c1df7ec..935657b2c661 100644
> --- a/drivers/iommu/intel_irq_remapping.c
> +++ b/drivers/iommu/intel_irq_remapping.c
> @@ -113,7 +113,7 @@ static int alloc_irte(struct intel_iommu *iommu,
> return -1;
>
> if (count > 1) {
> - count = __roundup_pow_of_two(count);
> + count = roundup_pow_of_two(count);
> mask = ilog2(count);
> }
>
> diff --git a/drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c b/drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c
> index 6a757dadb5f1..fd5b12c23eaa 100644
> --- a/drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c
> +++ b/drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c
> @@ -680,13 +680,13 @@ static int xgbe_set_ringparam(struct net_device *netdev,
> return -EINVAL;
> }
>
> - rx = __rounddown_pow_of_two(ringparam->rx_pending);
> + rx = rounddown_pow_of_two(ringparam->rx_pending);
> if (rx != ringparam->rx_pending)
> netdev_notice(netdev,
> "rx ring parameter rounded to power of two: %u\n",
> rx);
>
> - tx = __rounddown_pow_of_two(ringparam->tx_pending);
> + tx = rounddown_pow_of_two(ringparam->tx_pending);
> if (tx != ringparam->tx_pending)
> netdev_notice(netdev,
> "tx ring parameter rounded to power of two: %u\n",
> diff --git a/drivers/net/ethernet/marvell/sky2.c b/drivers/net/ethernet/marvell/sky2.c
> index 5f56ee83e3b1..cc3a03b4a611 100644
> --- a/drivers/net/ethernet/marvell/sky2.c
> +++ b/drivers/net/ethernet/marvell/sky2.c
> @@ -4139,7 +4139,7 @@ static int sky2_set_coalesce(struct net_device *dev,
> */
> static unsigned long roundup_ring_size(unsigned long pending)
> {
> - return max(128ul, roundup_pow_of_two(pending+1));
> + return max(128ull, roundup_pow_of_two(pending+1));
> }
>
> static void sky2_get_ringparam(struct net_device *dev,
> diff --git a/drivers/net/ethernet/rocker/rocker_hw.h b/drivers/net/ethernet/rocker/rocker_hw.h
> index 59f1f8b690d2..d8de15509e2c 100644
> --- a/drivers/net/ethernet/rocker/rocker_hw.h
> +++ b/drivers/net/ethernet/rocker/rocker_hw.h
> @@ -88,8 +88,8 @@ enum rocker_dma_type {
> };
>
> /* Rocker DMA ring size limits and default sizes */
> -#define ROCKER_DMA_SIZE_MIN 2ul
> -#define ROCKER_DMA_SIZE_MAX 65536ul
> +#define ROCKER_DMA_SIZE_MIN 2ull
> +#define ROCKER_DMA_SIZE_MAX 65536ull
> #define ROCKER_DMA_CMD_DEFAULT_SIZE 32ul
> #define ROCKER_DMA_EVENT_DEFAULT_SIZE 32ul
> #define ROCKER_DMA_TX_DEFAULT_SIZE 64ul
> diff --git a/drivers/net/ethernet/sfc/ef10.c b/drivers/net/ethernet/sfc/ef10.c
> index 4d9bbccc6f89..4f4d9a5b3b75 100644
> --- a/drivers/net/ethernet/sfc/ef10.c
> +++ b/drivers/net/ethernet/sfc/ef10.c
> @@ -27,7 +27,7 @@ enum {
> };
> /* The maximum size of a shared RSS context */
> /* TODO: this should really be from the mcdi protocol export */
> -#define EFX_EF10_MAX_SHARED_RSS_CONTEXT_SIZE 64UL
> +#define EFX_EF10_MAX_SHARED_RSS_CONTEXT_SIZE 64ULL
>
> /* The filter table(s) are managed by firmware and we have write-only
> * access. When removing filters we must identify them to the
> diff --git a/drivers/net/ethernet/sfc/efx.h b/drivers/net/ethernet/sfc/efx.h
> index 2dd8d5002315..fea2add5860e 100644
> --- a/drivers/net/ethernet/sfc/efx.h
> +++ b/drivers/net/ethernet/sfc/efx.h
> @@ -52,7 +52,7 @@ void efx_schedule_slow_fill(struct efx_rx_queue *rx_queue);
>
> #define EFX_MAX_DMAQ_SIZE 4096UL
> #define EFX_DEFAULT_DMAQ_SIZE 1024UL
> -#define EFX_MIN_DMAQ_SIZE 512UL
> +#define EFX_MIN_DMAQ_SIZE 512ULL
>
> #define EFX_MAX_EVQ_SIZE 16384UL
> #define EFX_MIN_EVQ_SIZE 512UL
> diff --git a/drivers/net/ethernet/sfc/falcon/efx.h b/drivers/net/ethernet/sfc/falcon/efx.h
> index d3b4646545fa..0d16257156d6 100644
> --- a/drivers/net/ethernet/sfc/falcon/efx.h
> +++ b/drivers/net/ethernet/sfc/falcon/efx.h
> @@ -55,7 +55,7 @@ void ef4_schedule_slow_fill(struct ef4_rx_queue *rx_queue);
>
> #define EF4_MAX_DMAQ_SIZE 4096UL
> #define EF4_DEFAULT_DMAQ_SIZE 1024UL
> -#define EF4_MIN_DMAQ_SIZE 512UL
> +#define EF4_MIN_DMAQ_SIZE 512ULL
>
> #define EF4_MAX_EVQ_SIZE 16384UL
> #define EF4_MIN_EVQ_SIZE 512UL
> diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c
> index c7709e49f0e4..f0391e88bc42 100644
> --- a/drivers/pci/msi.c
> +++ b/drivers/pci/msi.c
> @@ -578,7 +578,7 @@ msi_setup_entry(struct pci_dev *dev, int nvec, struct irq_affinity *affd)
> entry->msi_attrib.maskbit = !!(control & PCI_MSI_FLAGS_MASKBIT);
> entry->msi_attrib.default_irq = dev->irq; /* Save IOAPIC IRQ */
> entry->msi_attrib.multi_cap = (control & PCI_MSI_FLAGS_QMASK) >> 1;
> - entry->msi_attrib.multiple = ilog2(__roundup_pow_of_two(nvec));
> + entry->msi_attrib.multiple = ilog2(roundup_pow_of_two(nvec));
>
> if (control & PCI_MSI_FLAGS_64BIT)
> entry->mask_pos = dev->msi_cap + PCI_MSI_MASK_64;
> diff --git a/include/linux/log2.h b/include/linux/log2.h
> index 83a4a3ca3e8a..53a727303dac 100644
> --- a/include/linux/log2.h
> +++ b/include/linux/log2.h
> @@ -47,26 +47,6 @@ bool is_power_of_2(unsigned long n)
> return (n != 0 && ((n & (n - 1)) == 0));
> }
>
> -/**
> - * __roundup_pow_of_two() - round up to nearest power of two
> - * @n: value to round up
> - */
> -static inline __attribute__((const))
> -unsigned long __roundup_pow_of_two(unsigned long n)
> -{
> - return 1UL << fls_long(n - 1);
> -}
> -
> -/**
> - * __rounddown_pow_of_two() - round down to nearest power of two
> - * @n: value to round down
> - */
> -static inline __attribute__((const))
> -unsigned long __rounddown_pow_of_two(unsigned long n)
> -{
> - return 1UL << (fls_long(n) - 1);
> -}
> -
> /**
> * const_ilog2 - log base 2 of 32-bit or a 64-bit constant unsigned value
> * @n: parameter
> @@ -170,14 +150,11 @@ unsigned long __rounddown_pow_of_two(unsigned long n)
> * - the result is undefined when n == 0
> * - this can be used to initialise global variables from constant data
> */
> -#define roundup_pow_of_two(n) \
> -( \
> - __builtin_constant_p(n) ? ( \
> - (n == 1) ? 1 : \
> - (1UL << (ilog2((n) - 1) + 1)) \
> - ) : \
> - __roundup_pow_of_two(n) \
> - )
> +#define roundup_pow_of_two(n) \
> +( \
> + (__builtin_constant_p(n) && ((n) == 1)) ? \
> + 1 : (1ULL << (ilog2((n) - 1) + 1)) \
> +)
>
> /**
> * rounddown_pow_of_two - round the given value down to nearest power of two
> @@ -187,12 +164,11 @@ unsigned long __rounddown_pow_of_two(unsigned long n)
> * - the result is undefined when n == 0
> * - this can be used to initialise global variables from constant data
> */
> -#define rounddown_pow_of_two(n) \
> -( \
> - __builtin_constant_p(n) ? ( \
> - (1UL << ilog2(n))) : \
> - __rounddown_pow_of_two(n) \
> - )
> +#define rounddown_pow_of_two(n) \
> +( \
> + (__builtin_constant_p(n) && ((n) == 1)) ? \
> + 1 : (1ULL << (ilog2(n))) \
> +)
>
> static inline __attribute_const__
> int __order_base_2(unsigned long n)
> diff --git a/kernel/kexec_core.c b/kernel/kexec_core.c
> index 15d70a90b50d..bb9efc6944a4 100644
> --- a/kernel/kexec_core.c
> +++ b/kernel/kexec_core.c
> @@ -1094,7 +1094,8 @@ static int __init crash_notes_memory_init(void)
> * crash_notes is allocated inside one physical page.
> */
> size = sizeof(note_buf_t);
> - align = min(roundup_pow_of_two(sizeof(note_buf_t)), PAGE_SIZE);
> + align = min(roundup_pow_of_two(sizeof(note_buf_t)),
> + (unsigned long long)PAGE_SIZE);
>
> /*
> * Break compile if size is bigger than PAGE_SIZE since crash_notes
> diff --git a/lib/rhashtable.c b/lib/rhashtable.c
> index bdb7e4cadf05..70908678c7a8 100644
> --- a/lib/rhashtable.c
> +++ b/lib/rhashtable.c
> @@ -950,7 +950,7 @@ static size_t rounded_hashtable_size(const struct rhashtable_params *params)
>
> if (params->nelem_hint)
> retsize = max(roundup_pow_of_two(params->nelem_hint * 4 / 3),
> - (unsigned long)params->min_size);
> + (unsigned long long)params->min_size);
> else
> retsize = max(HASH_DEFAULT_SIZE,
> (unsigned long)params->min_size);
> diff --git a/net/sunrpc/xprtrdma/verbs.c b/net/sunrpc/xprtrdma/verbs.c
> index 77c7dd7f05e8..78fb8ccabddd 100644
> --- a/net/sunrpc/xprtrdma/verbs.c
> +++ b/net/sunrpc/xprtrdma/verbs.c
> @@ -1015,7 +1015,7 @@ struct rpcrdma_req *rpcrdma_req_create(struct rpcrdma_xprt *r_xprt, size_t size,
> maxhdrsize = rpcrdma_fixed_maxsz + 3 +
> r_xprt->rx_ia.ri_max_segs * rpcrdma_readchunk_maxsz;
> maxhdrsize *= sizeof(__be32);
> - rb = rpcrdma_regbuf_alloc(__roundup_pow_of_two(maxhdrsize),
> + rb = rpcrdma_regbuf_alloc(roundup_pow_of_two(maxhdrsize),
> DMA_TO_DEVICE, flags);
> if (!rb)
> goto out2;
>
_______________________________________________
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iommu@lists.linux-foundation.org
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^ permalink raw reply [flat|nested] 71+ messages in thread
* Re: [PATCH v4 7/8] linux/log2.h: Fix 64bit calculations in roundup/down_pow_two()
@ 2019-12-04 10:56 ` Martin Habets
0 siblings, 0 replies; 71+ messages in thread
From: Martin Habets @ 2019-12-04 10:56 UTC (permalink / raw)
To: Nicolas Saenz Julienne, andrew.murray, maz, linux-kernel,
Michael Turquette, Stephen Boyd, Emilio López,
Maxime Ripard, Chen-Yu Tsai, Mike Marciniszyn,
Dennis Dalessandro, Yishai Hadas, Moni Shoua, David Woodhouse,
Lu Baolu, Joerg Roedel, Tom Lendacky, Mirko Lindner,
Stephen Hemminger, Jiri Pirko, Solarflare linux maintainers,
Edward Cree, Bjorn Helgaas, Eric Biederman, Thomas Graf,
Herbert Xu
Cc: linux-pci, J. Bruce Fields, linux-clk, f.fainelli, linux-rdma,
phil, Jason Gunthorpe, Doug Ledford, linux-rpi-kernel,
Trond Myklebust, linux-arm-kernel, linux-nfs, mbrugger, netdev,
kexec, jeremy.linton, David S. Miller, iommu, Chuck Lever,
wahrenst, james.quinlan, Anna Schumaker, Robin Murphy
For the changes under drivers/net/ethernet/sfc:
Reviewed-by: Martin Habets <mhabets@solarflare.com>
On 03/12/2019 11:47, Nicolas Saenz Julienne wrote:
> Some users need to make sure their rounding function accepts and returns
> 64bit long variables regardless of the architecture. Sadly
> roundup/rounddown_pow_two() takes and returns unsigned longs. It turns
> out ilog2() already handles 32/64bit calculations properly, and being
> the building block to the round functions we can rework them as a
> wrapper around it.
>
> Suggested-by: Robin Murphy <robin.murphy@arm.con>
> Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
> ---
> drivers/clk/clk-divider.c | 8 ++--
> drivers/clk/sunxi/clk-sunxi.c | 2 +-
> drivers/infiniband/hw/hfi1/chip.c | 4 +-
> drivers/infiniband/hw/hfi1/init.c | 4 +-
> drivers/infiniband/hw/mlx4/srq.c | 2 +-
> drivers/infiniband/hw/mthca/mthca_srq.c | 2 +-
> drivers/infiniband/sw/rxe/rxe_qp.c | 4 +-
> drivers/iommu/intel-iommu.c | 4 +-
> drivers/iommu/intel-svm.c | 4 +-
> drivers/iommu/intel_irq_remapping.c | 2 +-
> drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c | 4 +-
> drivers/net/ethernet/marvell/sky2.c | 2 +-
> drivers/net/ethernet/rocker/rocker_hw.h | 4 +-
> drivers/net/ethernet/sfc/ef10.c | 2 +-
> drivers/net/ethernet/sfc/efx.h | 2 +-
> drivers/net/ethernet/sfc/falcon/efx.h | 2 +-
> drivers/pci/msi.c | 2 +-
> include/linux/log2.h | 44 +++++---------------
> kernel/kexec_core.c | 3 +-
> lib/rhashtable.c | 2 +-
> net/sunrpc/xprtrdma/verbs.c | 2 +-
> 21 files changed, 41 insertions(+), 64 deletions(-)
>
> diff --git a/drivers/clk/clk-divider.c b/drivers/clk/clk-divider.c
> index 098b2b01f0af..ba947e4c8193 100644
> --- a/drivers/clk/clk-divider.c
> +++ b/drivers/clk/clk-divider.c
> @@ -222,7 +222,7 @@ static int _div_round_up(const struct clk_div_table *table,
> int div = DIV_ROUND_UP_ULL((u64)parent_rate, rate);
>
> if (flags & CLK_DIVIDER_POWER_OF_TWO)
> - div = __roundup_pow_of_two(div);
> + div = roundup_pow_of_two(div);
> if (table)
> div = _round_up_table(table, div);
>
> @@ -240,8 +240,8 @@ static int _div_round_closest(const struct clk_div_table *table,
> down = parent_rate / rate;
>
> if (flags & CLK_DIVIDER_POWER_OF_TWO) {
> - up = __roundup_pow_of_two(up);
> - down = __rounddown_pow_of_two(down);
> + up = roundup_pow_of_two(up);
> + down = rounddown_pow_of_two(down);
> } else if (table) {
> up = _round_up_table(table, up);
> down = _round_down_table(table, down);
> @@ -278,7 +278,7 @@ static int _next_div(const struct clk_div_table *table, int div,
> div++;
>
> if (flags & CLK_DIVIDER_POWER_OF_TWO)
> - return __roundup_pow_of_two(div);
> + return roundup_pow_of_two(div);
> if (table)
> return _round_up_table(table, div);
>
> diff --git a/drivers/clk/sunxi/clk-sunxi.c b/drivers/clk/sunxi/clk-sunxi.c
> index 27201fd26e44..faec99dc09c0 100644
> --- a/drivers/clk/sunxi/clk-sunxi.c
> +++ b/drivers/clk/sunxi/clk-sunxi.c
> @@ -311,7 +311,7 @@ static void sun6i_get_ahb1_factors(struct factors_request *req)
>
> calcm = DIV_ROUND_UP(div, 1 << calcp);
> } else {
> - calcp = __roundup_pow_of_two(div);
> + calcp = roundup_pow_of_two(div);
> calcp = calcp > 3 ? 3 : calcp;
> }
>
> diff --git a/drivers/infiniband/hw/hfi1/chip.c b/drivers/infiniband/hw/hfi1/chip.c
> index 9b1fb84a3d45..96b1d343c32f 100644
> --- a/drivers/infiniband/hw/hfi1/chip.c
> +++ b/drivers/infiniband/hw/hfi1/chip.c
> @@ -14199,10 +14199,10 @@ static int qos_rmt_entries(struct hfi1_devdata *dd, unsigned int *mp,
> max_by_vl = krcvqs[i];
> if (max_by_vl > 32)
> goto no_qos;
> - m = ilog2(__roundup_pow_of_two(max_by_vl));
> + m = ilog2(roundup_pow_of_two(max_by_vl));
>
> /* determine bits for vl */
> - n = ilog2(__roundup_pow_of_two(num_vls));
> + n = ilog2(roundup_pow_of_two(num_vls));
>
> /* reject if too much is used */
> if ((m + n) > 7)
> diff --git a/drivers/infiniband/hw/hfi1/init.c b/drivers/infiniband/hw/hfi1/init.c
> index 26b792bb1027..838c789c7cce 100644
> --- a/drivers/infiniband/hw/hfi1/init.c
> +++ b/drivers/infiniband/hw/hfi1/init.c
> @@ -467,7 +467,7 @@ int hfi1_create_ctxtdata(struct hfi1_pportdata *ppd, int numa,
> * MTU supported.
> */
> if (rcd->egrbufs.size < hfi1_max_mtu) {
> - rcd->egrbufs.size = __roundup_pow_of_two(hfi1_max_mtu);
> + rcd->egrbufs.size = roundup_pow_of_two(hfi1_max_mtu);
> hfi1_cdbg(PROC,
> "ctxt%u: eager bufs size too small. Adjusting to %u\n",
> rcd->ctxt, rcd->egrbufs.size);
> @@ -1959,7 +1959,7 @@ int hfi1_setup_eagerbufs(struct hfi1_ctxtdata *rcd)
> * to satisfy the "multiple of 8 RcvArray entries" requirement.
> */
> if (rcd->egrbufs.size <= (1 << 20))
> - rcd->egrbufs.rcvtid_size = max((unsigned long)round_mtu,
> + rcd->egrbufs.rcvtid_size = max((unsigned long long)round_mtu,
> rounddown_pow_of_two(rcd->egrbufs.size / 8));
>
> while (alloced_bytes < rcd->egrbufs.size &&
> diff --git a/drivers/infiniband/hw/mlx4/srq.c b/drivers/infiniband/hw/mlx4/srq.c
> index 8dcf6e3d9ae2..7e685600a7b3 100644
> --- a/drivers/infiniband/hw/mlx4/srq.c
> +++ b/drivers/infiniband/hw/mlx4/srq.c
> @@ -96,7 +96,7 @@ int mlx4_ib_create_srq(struct ib_srq *ib_srq,
> srq->msrq.max = roundup_pow_of_two(init_attr->attr.max_wr + 1);
> srq->msrq.max_gs = init_attr->attr.max_sge;
>
> - desc_size = max(32UL,
> + desc_size = max(32ULL,
> roundup_pow_of_two(sizeof (struct mlx4_wqe_srq_next_seg) +
> srq->msrq.max_gs *
> sizeof (struct mlx4_wqe_data_seg)));
> diff --git a/drivers/infiniband/hw/mthca/mthca_srq.c b/drivers/infiniband/hw/mthca/mthca_srq.c
> index a85935ccce88..0c2e14b4142a 100644
> --- a/drivers/infiniband/hw/mthca/mthca_srq.c
> +++ b/drivers/infiniband/hw/mthca/mthca_srq.c
> @@ -225,7 +225,7 @@ int mthca_alloc_srq(struct mthca_dev *dev, struct mthca_pd *pd,
> else
> srq->max = srq->max + 1;
>
> - ds = max(64UL,
> + ds = max(64ULL,
> roundup_pow_of_two(sizeof (struct mthca_next_seg) +
> srq->max_gs * sizeof (struct mthca_data_seg)));
>
> diff --git a/drivers/infiniband/sw/rxe/rxe_qp.c b/drivers/infiniband/sw/rxe/rxe_qp.c
> index e2c6d1cedf41..040b707b0877 100644
> --- a/drivers/infiniband/sw/rxe/rxe_qp.c
> +++ b/drivers/infiniband/sw/rxe/rxe_qp.c
> @@ -592,7 +592,7 @@ int rxe_qp_from_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask,
> int err;
>
> if (mask & IB_QP_MAX_QP_RD_ATOMIC) {
> - int max_rd_atomic = __roundup_pow_of_two(attr->max_rd_atomic);
> + int max_rd_atomic = roundup_pow_of_two(attr->max_rd_atomic);
>
> qp->attr.max_rd_atomic = max_rd_atomic;
> atomic_set(&qp->req.rd_atomic, max_rd_atomic);
> @@ -600,7 +600,7 @@ int rxe_qp_from_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask,
>
> if (mask & IB_QP_MAX_DEST_RD_ATOMIC) {
> int max_dest_rd_atomic =
> - __roundup_pow_of_two(attr->max_dest_rd_atomic);
> + roundup_pow_of_two(attr->max_dest_rd_atomic);
>
> qp->attr.max_dest_rd_atomic = max_dest_rd_atomic;
>
> diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
> index 0c8d81f56a30..ce7c900bd666 100644
> --- a/drivers/iommu/intel-iommu.c
> +++ b/drivers/iommu/intel-iommu.c
> @@ -1488,7 +1488,7 @@ static void iommu_flush_iotlb_psi(struct intel_iommu *iommu,
> unsigned long pfn, unsigned int pages,
> int ih, int map)
> {
> - unsigned int mask = ilog2(__roundup_pow_of_two(pages));
> + unsigned int mask = ilog2(roundup_pow_of_two(pages));
> uint64_t addr = (uint64_t)pfn << VTD_PAGE_SHIFT;
> u16 did = domain->iommu_did[iommu->seq_id];
>
> @@ -3390,7 +3390,7 @@ static unsigned long intel_alloc_iova(struct device *dev,
> /* Restrict dma_mask to the width that the iommu can handle */
> dma_mask = min_t(uint64_t, DOMAIN_MAX_ADDR(domain->gaw), dma_mask);
> /* Ensure we reserve the whole size-aligned region */
> - nrpages = __roundup_pow_of_two(nrpages);
> + nrpages = roundup_pow_of_two(nrpages);
>
> if (!dmar_forcedac && dma_mask > DMA_BIT_MASK(32)) {
> /*
> diff --git a/drivers/iommu/intel-svm.c b/drivers/iommu/intel-svm.c
> index 9b159132405d..602caca3cd1a 100644
> --- a/drivers/iommu/intel-svm.c
> +++ b/drivers/iommu/intel-svm.c
> @@ -115,7 +115,7 @@ static void intel_flush_svm_range_dev (struct intel_svm *svm, struct intel_svm_d
> QI_EIOTLB_TYPE;
> desc.qw1 = 0;
> } else {
> - int mask = ilog2(__roundup_pow_of_two(pages));
> + int mask = ilog2(roundup_pow_of_two(pages));
>
> desc.qw0 = QI_EIOTLB_PASID(svm->pasid) |
> QI_EIOTLB_DID(sdev->did) |
> @@ -142,7 +142,7 @@ static void intel_flush_svm_range_dev (struct intel_svm *svm, struct intel_svm_d
> * for example, an "address" value of 0x12345f000 will
> * flush from 0x123440000 to 0x12347ffff (256KiB). */
> unsigned long last = address + ((unsigned long)(pages - 1) << VTD_PAGE_SHIFT);
> - unsigned long mask = __rounddown_pow_of_two(address ^ last);
> + unsigned long mask = rounddown_pow_of_two(address ^ last);
>
> desc.qw1 = QI_DEV_EIOTLB_ADDR((address & ~mask) |
> (mask - 1)) | QI_DEV_EIOTLB_SIZE;
> diff --git a/drivers/iommu/intel_irq_remapping.c b/drivers/iommu/intel_irq_remapping.c
> index 81e43c1df7ec..935657b2c661 100644
> --- a/drivers/iommu/intel_irq_remapping.c
> +++ b/drivers/iommu/intel_irq_remapping.c
> @@ -113,7 +113,7 @@ static int alloc_irte(struct intel_iommu *iommu,
> return -1;
>
> if (count > 1) {
> - count = __roundup_pow_of_two(count);
> + count = roundup_pow_of_two(count);
> mask = ilog2(count);
> }
>
> diff --git a/drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c b/drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c
> index 6a757dadb5f1..fd5b12c23eaa 100644
> --- a/drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c
> +++ b/drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c
> @@ -680,13 +680,13 @@ static int xgbe_set_ringparam(struct net_device *netdev,
> return -EINVAL;
> }
>
> - rx = __rounddown_pow_of_two(ringparam->rx_pending);
> + rx = rounddown_pow_of_two(ringparam->rx_pending);
> if (rx != ringparam->rx_pending)
> netdev_notice(netdev,
> "rx ring parameter rounded to power of two: %u\n",
> rx);
>
> - tx = __rounddown_pow_of_two(ringparam->tx_pending);
> + tx = rounddown_pow_of_two(ringparam->tx_pending);
> if (tx != ringparam->tx_pending)
> netdev_notice(netdev,
> "tx ring parameter rounded to power of two: %u\n",
> diff --git a/drivers/net/ethernet/marvell/sky2.c b/drivers/net/ethernet/marvell/sky2.c
> index 5f56ee83e3b1..cc3a03b4a611 100644
> --- a/drivers/net/ethernet/marvell/sky2.c
> +++ b/drivers/net/ethernet/marvell/sky2.c
> @@ -4139,7 +4139,7 @@ static int sky2_set_coalesce(struct net_device *dev,
> */
> static unsigned long roundup_ring_size(unsigned long pending)
> {
> - return max(128ul, roundup_pow_of_two(pending+1));
> + return max(128ull, roundup_pow_of_two(pending+1));
> }
>
> static void sky2_get_ringparam(struct net_device *dev,
> diff --git a/drivers/net/ethernet/rocker/rocker_hw.h b/drivers/net/ethernet/rocker/rocker_hw.h
> index 59f1f8b690d2..d8de15509e2c 100644
> --- a/drivers/net/ethernet/rocker/rocker_hw.h
> +++ b/drivers/net/ethernet/rocker/rocker_hw.h
> @@ -88,8 +88,8 @@ enum rocker_dma_type {
> };
>
> /* Rocker DMA ring size limits and default sizes */
> -#define ROCKER_DMA_SIZE_MIN 2ul
> -#define ROCKER_DMA_SIZE_MAX 65536ul
> +#define ROCKER_DMA_SIZE_MIN 2ull
> +#define ROCKER_DMA_SIZE_MAX 65536ull
> #define ROCKER_DMA_CMD_DEFAULT_SIZE 32ul
> #define ROCKER_DMA_EVENT_DEFAULT_SIZE 32ul
> #define ROCKER_DMA_TX_DEFAULT_SIZE 64ul
> diff --git a/drivers/net/ethernet/sfc/ef10.c b/drivers/net/ethernet/sfc/ef10.c
> index 4d9bbccc6f89..4f4d9a5b3b75 100644
> --- a/drivers/net/ethernet/sfc/ef10.c
> +++ b/drivers/net/ethernet/sfc/ef10.c
> @@ -27,7 +27,7 @@ enum {
> };
> /* The maximum size of a shared RSS context */
> /* TODO: this should really be from the mcdi protocol export */
> -#define EFX_EF10_MAX_SHARED_RSS_CONTEXT_SIZE 64UL
> +#define EFX_EF10_MAX_SHARED_RSS_CONTEXT_SIZE 64ULL
>
> /* The filter table(s) are managed by firmware and we have write-only
> * access. When removing filters we must identify them to the
> diff --git a/drivers/net/ethernet/sfc/efx.h b/drivers/net/ethernet/sfc/efx.h
> index 2dd8d5002315..fea2add5860e 100644
> --- a/drivers/net/ethernet/sfc/efx.h
> +++ b/drivers/net/ethernet/sfc/efx.h
> @@ -52,7 +52,7 @@ void efx_schedule_slow_fill(struct efx_rx_queue *rx_queue);
>
> #define EFX_MAX_DMAQ_SIZE 4096UL
> #define EFX_DEFAULT_DMAQ_SIZE 1024UL
> -#define EFX_MIN_DMAQ_SIZE 512UL
> +#define EFX_MIN_DMAQ_SIZE 512ULL
>
> #define EFX_MAX_EVQ_SIZE 16384UL
> #define EFX_MIN_EVQ_SIZE 512UL
> diff --git a/drivers/net/ethernet/sfc/falcon/efx.h b/drivers/net/ethernet/sfc/falcon/efx.h
> index d3b4646545fa..0d16257156d6 100644
> --- a/drivers/net/ethernet/sfc/falcon/efx.h
> +++ b/drivers/net/ethernet/sfc/falcon/efx.h
> @@ -55,7 +55,7 @@ void ef4_schedule_slow_fill(struct ef4_rx_queue *rx_queue);
>
> #define EF4_MAX_DMAQ_SIZE 4096UL
> #define EF4_DEFAULT_DMAQ_SIZE 1024UL
> -#define EF4_MIN_DMAQ_SIZE 512UL
> +#define EF4_MIN_DMAQ_SIZE 512ULL
>
> #define EF4_MAX_EVQ_SIZE 16384UL
> #define EF4_MIN_EVQ_SIZE 512UL
> diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c
> index c7709e49f0e4..f0391e88bc42 100644
> --- a/drivers/pci/msi.c
> +++ b/drivers/pci/msi.c
> @@ -578,7 +578,7 @@ msi_setup_entry(struct pci_dev *dev, int nvec, struct irq_affinity *affd)
> entry->msi_attrib.maskbit = !!(control & PCI_MSI_FLAGS_MASKBIT);
> entry->msi_attrib.default_irq = dev->irq; /* Save IOAPIC IRQ */
> entry->msi_attrib.multi_cap = (control & PCI_MSI_FLAGS_QMASK) >> 1;
> - entry->msi_attrib.multiple = ilog2(__roundup_pow_of_two(nvec));
> + entry->msi_attrib.multiple = ilog2(roundup_pow_of_two(nvec));
>
> if (control & PCI_MSI_FLAGS_64BIT)
> entry->mask_pos = dev->msi_cap + PCI_MSI_MASK_64;
> diff --git a/include/linux/log2.h b/include/linux/log2.h
> index 83a4a3ca3e8a..53a727303dac 100644
> --- a/include/linux/log2.h
> +++ b/include/linux/log2.h
> @@ -47,26 +47,6 @@ bool is_power_of_2(unsigned long n)
> return (n != 0 && ((n & (n - 1)) == 0));
> }
>
> -/**
> - * __roundup_pow_of_two() - round up to nearest power of two
> - * @n: value to round up
> - */
> -static inline __attribute__((const))
> -unsigned long __roundup_pow_of_two(unsigned long n)
> -{
> - return 1UL << fls_long(n - 1);
> -}
> -
> -/**
> - * __rounddown_pow_of_two() - round down to nearest power of two
> - * @n: value to round down
> - */
> -static inline __attribute__((const))
> -unsigned long __rounddown_pow_of_two(unsigned long n)
> -{
> - return 1UL << (fls_long(n) - 1);
> -}
> -
> /**
> * const_ilog2 - log base 2 of 32-bit or a 64-bit constant unsigned value
> * @n: parameter
> @@ -170,14 +150,11 @@ unsigned long __rounddown_pow_of_two(unsigned long n)
> * - the result is undefined when n == 0
> * - this can be used to initialise global variables from constant data
> */
> -#define roundup_pow_of_two(n) \
> -( \
> - __builtin_constant_p(n) ? ( \
> - (n == 1) ? 1 : \
> - (1UL << (ilog2((n) - 1) + 1)) \
> - ) : \
> - __roundup_pow_of_two(n) \
> - )
> +#define roundup_pow_of_two(n) \
> +( \
> + (__builtin_constant_p(n) && ((n) == 1)) ? \
> + 1 : (1ULL << (ilog2((n) - 1) + 1)) \
> +)
>
> /**
> * rounddown_pow_of_two - round the given value down to nearest power of two
> @@ -187,12 +164,11 @@ unsigned long __rounddown_pow_of_two(unsigned long n)
> * - the result is undefined when n == 0
> * - this can be used to initialise global variables from constant data
> */
> -#define rounddown_pow_of_two(n) \
> -( \
> - __builtin_constant_p(n) ? ( \
> - (1UL << ilog2(n))) : \
> - __rounddown_pow_of_two(n) \
> - )
> +#define rounddown_pow_of_two(n) \
> +( \
> + (__builtin_constant_p(n) && ((n) == 1)) ? \
> + 1 : (1ULL << (ilog2(n))) \
> +)
>
> static inline __attribute_const__
> int __order_base_2(unsigned long n)
> diff --git a/kernel/kexec_core.c b/kernel/kexec_core.c
> index 15d70a90b50d..bb9efc6944a4 100644
> --- a/kernel/kexec_core.c
> +++ b/kernel/kexec_core.c
> @@ -1094,7 +1094,8 @@ static int __init crash_notes_memory_init(void)
> * crash_notes is allocated inside one physical page.
> */
> size = sizeof(note_buf_t);
> - align = min(roundup_pow_of_two(sizeof(note_buf_t)), PAGE_SIZE);
> + align = min(roundup_pow_of_two(sizeof(note_buf_t)),
> + (unsigned long long)PAGE_SIZE);
>
> /*
> * Break compile if size is bigger than PAGE_SIZE since crash_notes
> diff --git a/lib/rhashtable.c b/lib/rhashtable.c
> index bdb7e4cadf05..70908678c7a8 100644
> --- a/lib/rhashtable.c
> +++ b/lib/rhashtable.c
> @@ -950,7 +950,7 @@ static size_t rounded_hashtable_size(const struct rhashtable_params *params)
>
> if (params->nelem_hint)
> retsize = max(roundup_pow_of_two(params->nelem_hint * 4 / 3),
> - (unsigned long)params->min_size);
> + (unsigned long long)params->min_size);
> else
> retsize = max(HASH_DEFAULT_SIZE,
> (unsigned long)params->min_size);
> diff --git a/net/sunrpc/xprtrdma/verbs.c b/net/sunrpc/xprtrdma/verbs.c
> index 77c7dd7f05e8..78fb8ccabddd 100644
> --- a/net/sunrpc/xprtrdma/verbs.c
> +++ b/net/sunrpc/xprtrdma/verbs.c
> @@ -1015,7 +1015,7 @@ struct rpcrdma_req *rpcrdma_req_create(struct rpcrdma_xprt *r_xprt, size_t size,
> maxhdrsize = rpcrdma_fixed_maxsz + 3 +
> r_xprt->rx_ia.ri_max_segs * rpcrdma_readchunk_maxsz;
> maxhdrsize *= sizeof(__be32);
> - rb = rpcrdma_regbuf_alloc(__roundup_pow_of_two(maxhdrsize),
> + rb = rpcrdma_regbuf_alloc(roundup_pow_of_two(maxhdrsize),
> DMA_TO_DEVICE, flags);
> if (!rb)
> goto out2;
>
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^ permalink raw reply [flat|nested] 71+ messages in thread
* Re: [PATCH v4 7/8] linux/log2.h: Fix 64bit calculations in roundup/down_pow_two()
@ 2019-12-04 10:56 ` Martin Habets
0 siblings, 0 replies; 71+ messages in thread
From: Martin Habets @ 2019-12-04 10:56 UTC (permalink / raw)
To: Nicolas Saenz Julienne, andrew.murray, maz, linux-kernel,
Michael Turquette, Stephen Boyd, Emilio López,
Maxime Ripard, Chen-Yu Tsai, Mike Marciniszyn,
Dennis Dalessandro, Yishai Hadas, Moni Shoua, David Woodhouse,
Lu Baolu, Joerg Roedel, Tom Lendacky, Mirko Lindner,
Stephen Hemminger, Jiri Pirko, Solarflare linux maintainers,
Edward Cree, Bjorn Helgaas, Eric Biederman, Thomas Graf,
Herbert Xu
Cc: linux-pci, J. Bruce Fields, linux-clk, f.fainelli, linux-rdma,
phil, Jason Gunthorpe, Doug Ledford, linux-rpi-kernel,
Trond Myklebust, linux-arm-kernel, linux-nfs, mbrugger, netdev,
kexec, jeremy.linton, David S. Miller, iommu, Chuck Lever,
wahrenst, james.quinlan, Anna Schumaker, Robin Murphy
For the changes under drivers/net/ethernet/sfc:
Reviewed-by: Martin Habets <mhabets@solarflare.com>
On 03/12/2019 11:47, Nicolas Saenz Julienne wrote:
> Some users need to make sure their rounding function accepts and returns
> 64bit long variables regardless of the architecture. Sadly
> roundup/rounddown_pow_two() takes and returns unsigned longs. It turns
> out ilog2() already handles 32/64bit calculations properly, and being
> the building block to the round functions we can rework them as a
> wrapper around it.
>
> Suggested-by: Robin Murphy <robin.murphy@arm.con>
> Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
> ---
> drivers/clk/clk-divider.c | 8 ++--
> drivers/clk/sunxi/clk-sunxi.c | 2 +-
> drivers/infiniband/hw/hfi1/chip.c | 4 +-
> drivers/infiniband/hw/hfi1/init.c | 4 +-
> drivers/infiniband/hw/mlx4/srq.c | 2 +-
> drivers/infiniband/hw/mthca/mthca_srq.c | 2 +-
> drivers/infiniband/sw/rxe/rxe_qp.c | 4 +-
> drivers/iommu/intel-iommu.c | 4 +-
> drivers/iommu/intel-svm.c | 4 +-
> drivers/iommu/intel_irq_remapping.c | 2 +-
> drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c | 4 +-
> drivers/net/ethernet/marvell/sky2.c | 2 +-
> drivers/net/ethernet/rocker/rocker_hw.h | 4 +-
> drivers/net/ethernet/sfc/ef10.c | 2 +-
> drivers/net/ethernet/sfc/efx.h | 2 +-
> drivers/net/ethernet/sfc/falcon/efx.h | 2 +-
> drivers/pci/msi.c | 2 +-
> include/linux/log2.h | 44 +++++---------------
> kernel/kexec_core.c | 3 +-
> lib/rhashtable.c | 2 +-
> net/sunrpc/xprtrdma/verbs.c | 2 +-
> 21 files changed, 41 insertions(+), 64 deletions(-)
>
> diff --git a/drivers/clk/clk-divider.c b/drivers/clk/clk-divider.c
> index 098b2b01f0af..ba947e4c8193 100644
> --- a/drivers/clk/clk-divider.c
> +++ b/drivers/clk/clk-divider.c
> @@ -222,7 +222,7 @@ static int _div_round_up(const struct clk_div_table *table,
> int div = DIV_ROUND_UP_ULL((u64)parent_rate, rate);
>
> if (flags & CLK_DIVIDER_POWER_OF_TWO)
> - div = __roundup_pow_of_two(div);
> + div = roundup_pow_of_two(div);
> if (table)
> div = _round_up_table(table, div);
>
> @@ -240,8 +240,8 @@ static int _div_round_closest(const struct clk_div_table *table,
> down = parent_rate / rate;
>
> if (flags & CLK_DIVIDER_POWER_OF_TWO) {
> - up = __roundup_pow_of_two(up);
> - down = __rounddown_pow_of_two(down);
> + up = roundup_pow_of_two(up);
> + down = rounddown_pow_of_two(down);
> } else if (table) {
> up = _round_up_table(table, up);
> down = _round_down_table(table, down);
> @@ -278,7 +278,7 @@ static int _next_div(const struct clk_div_table *table, int div,
> div++;
>
> if (flags & CLK_DIVIDER_POWER_OF_TWO)
> - return __roundup_pow_of_two(div);
> + return roundup_pow_of_two(div);
> if (table)
> return _round_up_table(table, div);
>
> diff --git a/drivers/clk/sunxi/clk-sunxi.c b/drivers/clk/sunxi/clk-sunxi.c
> index 27201fd26e44..faec99dc09c0 100644
> --- a/drivers/clk/sunxi/clk-sunxi.c
> +++ b/drivers/clk/sunxi/clk-sunxi.c
> @@ -311,7 +311,7 @@ static void sun6i_get_ahb1_factors(struct factors_request *req)
>
> calcm = DIV_ROUND_UP(div, 1 << calcp);
> } else {
> - calcp = __roundup_pow_of_two(div);
> + calcp = roundup_pow_of_two(div);
> calcp = calcp > 3 ? 3 : calcp;
> }
>
> diff --git a/drivers/infiniband/hw/hfi1/chip.c b/drivers/infiniband/hw/hfi1/chip.c
> index 9b1fb84a3d45..96b1d343c32f 100644
> --- a/drivers/infiniband/hw/hfi1/chip.c
> +++ b/drivers/infiniband/hw/hfi1/chip.c
> @@ -14199,10 +14199,10 @@ static int qos_rmt_entries(struct hfi1_devdata *dd, unsigned int *mp,
> max_by_vl = krcvqs[i];
> if (max_by_vl > 32)
> goto no_qos;
> - m = ilog2(__roundup_pow_of_two(max_by_vl));
> + m = ilog2(roundup_pow_of_two(max_by_vl));
>
> /* determine bits for vl */
> - n = ilog2(__roundup_pow_of_two(num_vls));
> + n = ilog2(roundup_pow_of_two(num_vls));
>
> /* reject if too much is used */
> if ((m + n) > 7)
> diff --git a/drivers/infiniband/hw/hfi1/init.c b/drivers/infiniband/hw/hfi1/init.c
> index 26b792bb1027..838c789c7cce 100644
> --- a/drivers/infiniband/hw/hfi1/init.c
> +++ b/drivers/infiniband/hw/hfi1/init.c
> @@ -467,7 +467,7 @@ int hfi1_create_ctxtdata(struct hfi1_pportdata *ppd, int numa,
> * MTU supported.
> */
> if (rcd->egrbufs.size < hfi1_max_mtu) {
> - rcd->egrbufs.size = __roundup_pow_of_two(hfi1_max_mtu);
> + rcd->egrbufs.size = roundup_pow_of_two(hfi1_max_mtu);
> hfi1_cdbg(PROC,
> "ctxt%u: eager bufs size too small. Adjusting to %u\n",
> rcd->ctxt, rcd->egrbufs.size);
> @@ -1959,7 +1959,7 @@ int hfi1_setup_eagerbufs(struct hfi1_ctxtdata *rcd)
> * to satisfy the "multiple of 8 RcvArray entries" requirement.
> */
> if (rcd->egrbufs.size <= (1 << 20))
> - rcd->egrbufs.rcvtid_size = max((unsigned long)round_mtu,
> + rcd->egrbufs.rcvtid_size = max((unsigned long long)round_mtu,
> rounddown_pow_of_two(rcd->egrbufs.size / 8));
>
> while (alloced_bytes < rcd->egrbufs.size &&
> diff --git a/drivers/infiniband/hw/mlx4/srq.c b/drivers/infiniband/hw/mlx4/srq.c
> index 8dcf6e3d9ae2..7e685600a7b3 100644
> --- a/drivers/infiniband/hw/mlx4/srq.c
> +++ b/drivers/infiniband/hw/mlx4/srq.c
> @@ -96,7 +96,7 @@ int mlx4_ib_create_srq(struct ib_srq *ib_srq,
> srq->msrq.max = roundup_pow_of_two(init_attr->attr.max_wr + 1);
> srq->msrq.max_gs = init_attr->attr.max_sge;
>
> - desc_size = max(32UL,
> + desc_size = max(32ULL,
> roundup_pow_of_two(sizeof (struct mlx4_wqe_srq_next_seg) +
> srq->msrq.max_gs *
> sizeof (struct mlx4_wqe_data_seg)));
> diff --git a/drivers/infiniband/hw/mthca/mthca_srq.c b/drivers/infiniband/hw/mthca/mthca_srq.c
> index a85935ccce88..0c2e14b4142a 100644
> --- a/drivers/infiniband/hw/mthca/mthca_srq.c
> +++ b/drivers/infiniband/hw/mthca/mthca_srq.c
> @@ -225,7 +225,7 @@ int mthca_alloc_srq(struct mthca_dev *dev, struct mthca_pd *pd,
> else
> srq->max = srq->max + 1;
>
> - ds = max(64UL,
> + ds = max(64ULL,
> roundup_pow_of_two(sizeof (struct mthca_next_seg) +
> srq->max_gs * sizeof (struct mthca_data_seg)));
>
> diff --git a/drivers/infiniband/sw/rxe/rxe_qp.c b/drivers/infiniband/sw/rxe/rxe_qp.c
> index e2c6d1cedf41..040b707b0877 100644
> --- a/drivers/infiniband/sw/rxe/rxe_qp.c
> +++ b/drivers/infiniband/sw/rxe/rxe_qp.c
> @@ -592,7 +592,7 @@ int rxe_qp_from_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask,
> int err;
>
> if (mask & IB_QP_MAX_QP_RD_ATOMIC) {
> - int max_rd_atomic = __roundup_pow_of_two(attr->max_rd_atomic);
> + int max_rd_atomic = roundup_pow_of_two(attr->max_rd_atomic);
>
> qp->attr.max_rd_atomic = max_rd_atomic;
> atomic_set(&qp->req.rd_atomic, max_rd_atomic);
> @@ -600,7 +600,7 @@ int rxe_qp_from_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask,
>
> if (mask & IB_QP_MAX_DEST_RD_ATOMIC) {
> int max_dest_rd_atomic =
> - __roundup_pow_of_two(attr->max_dest_rd_atomic);
> + roundup_pow_of_two(attr->max_dest_rd_atomic);
>
> qp->attr.max_dest_rd_atomic = max_dest_rd_atomic;
>
> diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
> index 0c8d81f56a30..ce7c900bd666 100644
> --- a/drivers/iommu/intel-iommu.c
> +++ b/drivers/iommu/intel-iommu.c
> @@ -1488,7 +1488,7 @@ static void iommu_flush_iotlb_psi(struct intel_iommu *iommu,
> unsigned long pfn, unsigned int pages,
> int ih, int map)
> {
> - unsigned int mask = ilog2(__roundup_pow_of_two(pages));
> + unsigned int mask = ilog2(roundup_pow_of_two(pages));
> uint64_t addr = (uint64_t)pfn << VTD_PAGE_SHIFT;
> u16 did = domain->iommu_did[iommu->seq_id];
>
> @@ -3390,7 +3390,7 @@ static unsigned long intel_alloc_iova(struct device *dev,
> /* Restrict dma_mask to the width that the iommu can handle */
> dma_mask = min_t(uint64_t, DOMAIN_MAX_ADDR(domain->gaw), dma_mask);
> /* Ensure we reserve the whole size-aligned region */
> - nrpages = __roundup_pow_of_two(nrpages);
> + nrpages = roundup_pow_of_two(nrpages);
>
> if (!dmar_forcedac && dma_mask > DMA_BIT_MASK(32)) {
> /*
> diff --git a/drivers/iommu/intel-svm.c b/drivers/iommu/intel-svm.c
> index 9b159132405d..602caca3cd1a 100644
> --- a/drivers/iommu/intel-svm.c
> +++ b/drivers/iommu/intel-svm.c
> @@ -115,7 +115,7 @@ static void intel_flush_svm_range_dev (struct intel_svm *svm, struct intel_svm_d
> QI_EIOTLB_TYPE;
> desc.qw1 = 0;
> } else {
> - int mask = ilog2(__roundup_pow_of_two(pages));
> + int mask = ilog2(roundup_pow_of_two(pages));
>
> desc.qw0 = QI_EIOTLB_PASID(svm->pasid) |
> QI_EIOTLB_DID(sdev->did) |
> @@ -142,7 +142,7 @@ static void intel_flush_svm_range_dev (struct intel_svm *svm, struct intel_svm_d
> * for example, an "address" value of 0x12345f000 will
> * flush from 0x123440000 to 0x12347ffff (256KiB). */
> unsigned long last = address + ((unsigned long)(pages - 1) << VTD_PAGE_SHIFT);
> - unsigned long mask = __rounddown_pow_of_two(address ^ last);
> + unsigned long mask = rounddown_pow_of_two(address ^ last);
>
> desc.qw1 = QI_DEV_EIOTLB_ADDR((address & ~mask) |
> (mask - 1)) | QI_DEV_EIOTLB_SIZE;
> diff --git a/drivers/iommu/intel_irq_remapping.c b/drivers/iommu/intel_irq_remapping.c
> index 81e43c1df7ec..935657b2c661 100644
> --- a/drivers/iommu/intel_irq_remapping.c
> +++ b/drivers/iommu/intel_irq_remapping.c
> @@ -113,7 +113,7 @@ static int alloc_irte(struct intel_iommu *iommu,
> return -1;
>
> if (count > 1) {
> - count = __roundup_pow_of_two(count);
> + count = roundup_pow_of_two(count);
> mask = ilog2(count);
> }
>
> diff --git a/drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c b/drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c
> index 6a757dadb5f1..fd5b12c23eaa 100644
> --- a/drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c
> +++ b/drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c
> @@ -680,13 +680,13 @@ static int xgbe_set_ringparam(struct net_device *netdev,
> return -EINVAL;
> }
>
> - rx = __rounddown_pow_of_two(ringparam->rx_pending);
> + rx = rounddown_pow_of_two(ringparam->rx_pending);
> if (rx != ringparam->rx_pending)
> netdev_notice(netdev,
> "rx ring parameter rounded to power of two: %u\n",
> rx);
>
> - tx = __rounddown_pow_of_two(ringparam->tx_pending);
> + tx = rounddown_pow_of_two(ringparam->tx_pending);
> if (tx != ringparam->tx_pending)
> netdev_notice(netdev,
> "tx ring parameter rounded to power of two: %u\n",
> diff --git a/drivers/net/ethernet/marvell/sky2.c b/drivers/net/ethernet/marvell/sky2.c
> index 5f56ee83e3b1..cc3a03b4a611 100644
> --- a/drivers/net/ethernet/marvell/sky2.c
> +++ b/drivers/net/ethernet/marvell/sky2.c
> @@ -4139,7 +4139,7 @@ static int sky2_set_coalesce(struct net_device *dev,
> */
> static unsigned long roundup_ring_size(unsigned long pending)
> {
> - return max(128ul, roundup_pow_of_two(pending+1));
> + return max(128ull, roundup_pow_of_two(pending+1));
> }
>
> static void sky2_get_ringparam(struct net_device *dev,
> diff --git a/drivers/net/ethernet/rocker/rocker_hw.h b/drivers/net/ethernet/rocker/rocker_hw.h
> index 59f1f8b690d2..d8de15509e2c 100644
> --- a/drivers/net/ethernet/rocker/rocker_hw.h
> +++ b/drivers/net/ethernet/rocker/rocker_hw.h
> @@ -88,8 +88,8 @@ enum rocker_dma_type {
> };
>
> /* Rocker DMA ring size limits and default sizes */
> -#define ROCKER_DMA_SIZE_MIN 2ul
> -#define ROCKER_DMA_SIZE_MAX 65536ul
> +#define ROCKER_DMA_SIZE_MIN 2ull
> +#define ROCKER_DMA_SIZE_MAX 65536ull
> #define ROCKER_DMA_CMD_DEFAULT_SIZE 32ul
> #define ROCKER_DMA_EVENT_DEFAULT_SIZE 32ul
> #define ROCKER_DMA_TX_DEFAULT_SIZE 64ul
> diff --git a/drivers/net/ethernet/sfc/ef10.c b/drivers/net/ethernet/sfc/ef10.c
> index 4d9bbccc6f89..4f4d9a5b3b75 100644
> --- a/drivers/net/ethernet/sfc/ef10.c
> +++ b/drivers/net/ethernet/sfc/ef10.c
> @@ -27,7 +27,7 @@ enum {
> };
> /* The maximum size of a shared RSS context */
> /* TODO: this should really be from the mcdi protocol export */
> -#define EFX_EF10_MAX_SHARED_RSS_CONTEXT_SIZE 64UL
> +#define EFX_EF10_MAX_SHARED_RSS_CONTEXT_SIZE 64ULL
>
> /* The filter table(s) are managed by firmware and we have write-only
> * access. When removing filters we must identify them to the
> diff --git a/drivers/net/ethernet/sfc/efx.h b/drivers/net/ethernet/sfc/efx.h
> index 2dd8d5002315..fea2add5860e 100644
> --- a/drivers/net/ethernet/sfc/efx.h
> +++ b/drivers/net/ethernet/sfc/efx.h
> @@ -52,7 +52,7 @@ void efx_schedule_slow_fill(struct efx_rx_queue *rx_queue);
>
> #define EFX_MAX_DMAQ_SIZE 4096UL
> #define EFX_DEFAULT_DMAQ_SIZE 1024UL
> -#define EFX_MIN_DMAQ_SIZE 512UL
> +#define EFX_MIN_DMAQ_SIZE 512ULL
>
> #define EFX_MAX_EVQ_SIZE 16384UL
> #define EFX_MIN_EVQ_SIZE 512UL
> diff --git a/drivers/net/ethernet/sfc/falcon/efx.h b/drivers/net/ethernet/sfc/falcon/efx.h
> index d3b4646545fa..0d16257156d6 100644
> --- a/drivers/net/ethernet/sfc/falcon/efx.h
> +++ b/drivers/net/ethernet/sfc/falcon/efx.h
> @@ -55,7 +55,7 @@ void ef4_schedule_slow_fill(struct ef4_rx_queue *rx_queue);
>
> #define EF4_MAX_DMAQ_SIZE 4096UL
> #define EF4_DEFAULT_DMAQ_SIZE 1024UL
> -#define EF4_MIN_DMAQ_SIZE 512UL
> +#define EF4_MIN_DMAQ_SIZE 512ULL
>
> #define EF4_MAX_EVQ_SIZE 16384UL
> #define EF4_MIN_EVQ_SIZE 512UL
> diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c
> index c7709e49f0e4..f0391e88bc42 100644
> --- a/drivers/pci/msi.c
> +++ b/drivers/pci/msi.c
> @@ -578,7 +578,7 @@ msi_setup_entry(struct pci_dev *dev, int nvec, struct irq_affinity *affd)
> entry->msi_attrib.maskbit = !!(control & PCI_MSI_FLAGS_MASKBIT);
> entry->msi_attrib.default_irq = dev->irq; /* Save IOAPIC IRQ */
> entry->msi_attrib.multi_cap = (control & PCI_MSI_FLAGS_QMASK) >> 1;
> - entry->msi_attrib.multiple = ilog2(__roundup_pow_of_two(nvec));
> + entry->msi_attrib.multiple = ilog2(roundup_pow_of_two(nvec));
>
> if (control & PCI_MSI_FLAGS_64BIT)
> entry->mask_pos = dev->msi_cap + PCI_MSI_MASK_64;
> diff --git a/include/linux/log2.h b/include/linux/log2.h
> index 83a4a3ca3e8a..53a727303dac 100644
> --- a/include/linux/log2.h
> +++ b/include/linux/log2.h
> @@ -47,26 +47,6 @@ bool is_power_of_2(unsigned long n)
> return (n != 0 && ((n & (n - 1)) == 0));
> }
>
> -/**
> - * __roundup_pow_of_two() - round up to nearest power of two
> - * @n: value to round up
> - */
> -static inline __attribute__((const))
> -unsigned long __roundup_pow_of_two(unsigned long n)
> -{
> - return 1UL << fls_long(n - 1);
> -}
> -
> -/**
> - * __rounddown_pow_of_two() - round down to nearest power of two
> - * @n: value to round down
> - */
> -static inline __attribute__((const))
> -unsigned long __rounddown_pow_of_two(unsigned long n)
> -{
> - return 1UL << (fls_long(n) - 1);
> -}
> -
> /**
> * const_ilog2 - log base 2 of 32-bit or a 64-bit constant unsigned value
> * @n: parameter
> @@ -170,14 +150,11 @@ unsigned long __rounddown_pow_of_two(unsigned long n)
> * - the result is undefined when n == 0
> * - this can be used to initialise global variables from constant data
> */
> -#define roundup_pow_of_two(n) \
> -( \
> - __builtin_constant_p(n) ? ( \
> - (n == 1) ? 1 : \
> - (1UL << (ilog2((n) - 1) + 1)) \
> - ) : \
> - __roundup_pow_of_two(n) \
> - )
> +#define roundup_pow_of_two(n) \
> +( \
> + (__builtin_constant_p(n) && ((n) == 1)) ? \
> + 1 : (1ULL << (ilog2((n) - 1) + 1)) \
> +)
>
> /**
> * rounddown_pow_of_two - round the given value down to nearest power of two
> @@ -187,12 +164,11 @@ unsigned long __rounddown_pow_of_two(unsigned long n)
> * - the result is undefined when n == 0
> * - this can be used to initialise global variables from constant data
> */
> -#define rounddown_pow_of_two(n) \
> -( \
> - __builtin_constant_p(n) ? ( \
> - (1UL << ilog2(n))) : \
> - __rounddown_pow_of_two(n) \
> - )
> +#define rounddown_pow_of_two(n) \
> +( \
> + (__builtin_constant_p(n) && ((n) == 1)) ? \
> + 1 : (1ULL << (ilog2(n))) \
> +)
>
> static inline __attribute_const__
> int __order_base_2(unsigned long n)
> diff --git a/kernel/kexec_core.c b/kernel/kexec_core.c
> index 15d70a90b50d..bb9efc6944a4 100644
> --- a/kernel/kexec_core.c
> +++ b/kernel/kexec_core.c
> @@ -1094,7 +1094,8 @@ static int __init crash_notes_memory_init(void)
> * crash_notes is allocated inside one physical page.
> */
> size = sizeof(note_buf_t);
> - align = min(roundup_pow_of_two(sizeof(note_buf_t)), PAGE_SIZE);
> + align = min(roundup_pow_of_two(sizeof(note_buf_t)),
> + (unsigned long long)PAGE_SIZE);
>
> /*
> * Break compile if size is bigger than PAGE_SIZE since crash_notes
> diff --git a/lib/rhashtable.c b/lib/rhashtable.c
> index bdb7e4cadf05..70908678c7a8 100644
> --- a/lib/rhashtable.c
> +++ b/lib/rhashtable.c
> @@ -950,7 +950,7 @@ static size_t rounded_hashtable_size(const struct rhashtable_params *params)
>
> if (params->nelem_hint)
> retsize = max(roundup_pow_of_two(params->nelem_hint * 4 / 3),
> - (unsigned long)params->min_size);
> + (unsigned long long)params->min_size);
> else
> retsize = max(HASH_DEFAULT_SIZE,
> (unsigned long)params->min_size);
> diff --git a/net/sunrpc/xprtrdma/verbs.c b/net/sunrpc/xprtrdma/verbs.c
> index 77c7dd7f05e8..78fb8ccabddd 100644
> --- a/net/sunrpc/xprtrdma/verbs.c
> +++ b/net/sunrpc/xprtrdma/verbs.c
> @@ -1015,7 +1015,7 @@ struct rpcrdma_req *rpcrdma_req_create(struct rpcrdma_xprt *r_xprt, size_t size,
> maxhdrsize = rpcrdma_fixed_maxsz + 3 +
> r_xprt->rx_ia.ri_max_segs * rpcrdma_readchunk_maxsz;
> maxhdrsize *= sizeof(__be32);
> - rb = rpcrdma_regbuf_alloc(__roundup_pow_of_two(maxhdrsize),
> + rb = rpcrdma_regbuf_alloc(roundup_pow_of_two(maxhdrsize),
> DMA_TO_DEVICE, flags);
> if (!rb)
> goto out2;
>
_______________________________________________
kexec mailing list
kexec@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/kexec
^ permalink raw reply [flat|nested] 71+ messages in thread
* Re: [PATCH v4 7/8] linux/log2.h: Fix 64bit calculations in roundup/down_pow_two()
2019-12-03 11:47 ` Nicolas Saenz Julienne
(?)
@ 2019-12-04 14:17 ` Leon Romanovsky
-1 siblings, 0 replies; 71+ messages in thread
From: Leon Romanovsky @ 2019-12-04 14:17 UTC (permalink / raw)
To: Nicolas Saenz Julienne
Cc: andrew.murray, maz, linux-kernel, Michael Turquette,
Stephen Boyd, Emilio López, Maxime Ripard, Chen-Yu Tsai,
Mike Marciniszyn, Dennis Dalessandro, Yishai Hadas, Moni Shoua,
David Woodhouse, Lu Baolu, Joerg Roedel, Tom Lendacky,
Mirko Lindner, Stephen Hemminger, Jiri Pirko,
Solarflare linux maintainers, Edward Cree, Martin Habets,
Bjorn Helgaas, Eric Biederman, Thomas Graf, Herbert Xu,
james.quinlan, mbrugger, f.fainelli, phil, wahrenst,
jeremy.linton, linux-pci, linux-rpi-kernel, Robin Murphy,
Doug Ledford, Jason Gunthorpe, David S. Miller, Trond Myklebust,
Anna Schumaker, J. Bruce Fields, Chuck Lever, linux-clk,
linux-arm-kernel, linux-rdma, iommu, netdev, kexec, linux-nfs
On Tue, Dec 03, 2019 at 12:47:40PM +0100, Nicolas Saenz Julienne wrote:
> Some users need to make sure their rounding function accepts and returns
> 64bit long variables regardless of the architecture. Sadly
> roundup/rounddown_pow_two() takes and returns unsigned longs. It turns
> out ilog2() already handles 32/64bit calculations properly, and being
> the building block to the round functions we can rework them as a
> wrapper around it.
>
> Suggested-by: Robin Murphy <robin.murphy@arm.con>
> Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
> ---
> drivers/clk/clk-divider.c | 8 ++--
> drivers/clk/sunxi/clk-sunxi.c | 2 +-
> drivers/infiniband/hw/hfi1/chip.c | 4 +-
> drivers/infiniband/hw/hfi1/init.c | 4 +-
> drivers/infiniband/hw/mlx4/srq.c | 2 +-
> drivers/infiniband/hw/mthca/mthca_srq.c | 2 +-
> drivers/infiniband/sw/rxe/rxe_qp.c | 4 +-
Thanks, for infiniband.
Reviewed-by: Leon Romanovsky <leonro@mellanox.com>
^ permalink raw reply [flat|nested] 71+ messages in thread
* Re: [PATCH v4 7/8] linux/log2.h: Fix 64bit calculations in roundup/down_pow_two()
@ 2019-12-04 14:17 ` Leon Romanovsky
0 siblings, 0 replies; 71+ messages in thread
From: Leon Romanovsky @ 2019-12-04 14:17 UTC (permalink / raw)
To: Nicolas Saenz Julienne
Cc: linux-pci, Michael Turquette, J. Bruce Fields, linux-nfs,
Edward Cree, linux-clk, f.fainelli, Herbert Xu,
Emilio López, maz, phil, Doug Ledford, Jason Gunthorpe,
Chen-Yu Tsai, Chuck Lever, Martin Habets, wahrenst, Tom Lendacky,
Jiri Pirko, Solarflare linux maintainers, Maxime Ripard,
linux-rpi-kernel, Anna Schumaker, Bjorn Helgaas, Trond Myklebust,
linux-arm-kernel, Mirko Lindner, Mike Marciniszyn, mbrugger,
Stephen Boyd, netdev, Yishai Hadas, kexec, linux-kernel,
jeremy.linton, David S. Miller, Stephen Hemminger, linux-rdma,
iommu, Moni Shoua, Eric Biederman, james.quinlan, Thomas Graf,
Robin Murphy, David Woodhouse, Dennis Dalessandro
On Tue, Dec 03, 2019 at 12:47:40PM +0100, Nicolas Saenz Julienne wrote:
> Some users need to make sure their rounding function accepts and returns
> 64bit long variables regardless of the architecture. Sadly
> roundup/rounddown_pow_two() takes and returns unsigned longs. It turns
> out ilog2() already handles 32/64bit calculations properly, and being
> the building block to the round functions we can rework them as a
> wrapper around it.
>
> Suggested-by: Robin Murphy <robin.murphy@arm.con>
> Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
> ---
> drivers/clk/clk-divider.c | 8 ++--
> drivers/clk/sunxi/clk-sunxi.c | 2 +-
> drivers/infiniband/hw/hfi1/chip.c | 4 +-
> drivers/infiniband/hw/hfi1/init.c | 4 +-
> drivers/infiniband/hw/mlx4/srq.c | 2 +-
> drivers/infiniband/hw/mthca/mthca_srq.c | 2 +-
> drivers/infiniband/sw/rxe/rxe_qp.c | 4 +-
Thanks, for infiniband.
Reviewed-by: Leon Romanovsky <leonro@mellanox.com>
_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu
^ permalink raw reply [flat|nested] 71+ messages in thread
* Re: [PATCH v4 7/8] linux/log2.h: Fix 64bit calculations in roundup/down_pow_two()
@ 2019-12-04 14:17 ` Leon Romanovsky
0 siblings, 0 replies; 71+ messages in thread
From: Leon Romanovsky @ 2019-12-04 14:17 UTC (permalink / raw)
To: Nicolas Saenz Julienne
Cc: linux-pci, Michael Turquette, J. Bruce Fields, linux-nfs,
Edward Cree, linux-clk, f.fainelli, Herbert Xu,
Emilio López, maz, Joerg Roedel, phil, Doug Ledford,
Jason Gunthorpe, Chen-Yu Tsai, Chuck Lever, Martin Habets,
wahrenst, Tom Lendacky, Jiri Pirko, Solarflare linux maintainers,
Maxime Ripard, linux-rpi-kernel, Anna Schumaker, Bjorn Helgaas,
Trond Myklebust, linux-arm-kernel, Mirko Lindner,
Mike Marciniszyn, mbrugger, Stephen Boyd, netdev, Yishai Hadas,
kexec, linux-kernel, jeremy.linton, David S. Miller,
Stephen Hemminger, linux-rdma, iommu, Moni Shoua, Eric Biederman,
james.quinlan, Thomas Graf, andrew.murray, Robin Murphy,
David Woodhouse, Dennis Dalessandro, Lu Baolu
On Tue, Dec 03, 2019 at 12:47:40PM +0100, Nicolas Saenz Julienne wrote:
> Some users need to make sure their rounding function accepts and returns
> 64bit long variables regardless of the architecture. Sadly
> roundup/rounddown_pow_two() takes and returns unsigned longs. It turns
> out ilog2() already handles 32/64bit calculations properly, and being
> the building block to the round functions we can rework them as a
> wrapper around it.
>
> Suggested-by: Robin Murphy <robin.murphy@arm.con>
> Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
> ---
> drivers/clk/clk-divider.c | 8 ++--
> drivers/clk/sunxi/clk-sunxi.c | 2 +-
> drivers/infiniband/hw/hfi1/chip.c | 4 +-
> drivers/infiniband/hw/hfi1/init.c | 4 +-
> drivers/infiniband/hw/mlx4/srq.c | 2 +-
> drivers/infiniband/hw/mthca/mthca_srq.c | 2 +-
> drivers/infiniband/sw/rxe/rxe_qp.c | 4 +-
Thanks, for infiniband.
Reviewed-by: Leon Romanovsky <leonro@mellanox.com>
_______________________________________________
kexec mailing list
kexec@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/kexec
^ permalink raw reply [flat|nested] 71+ messages in thread
* Re: [PATCH v4 7/8] linux/log2.h: Fix 64bit calculations in roundup/down_pow_two()
2019-12-03 11:47 ` Nicolas Saenz Julienne
(?)
@ 2019-12-05 0:39 ` Lu Baolu
-1 siblings, 0 replies; 71+ messages in thread
From: Lu Baolu @ 2019-12-05 0:39 UTC (permalink / raw)
To: Nicolas Saenz Julienne, andrew.murray, maz, linux-kernel,
Michael Turquette, Stephen Boyd, Emilio López,
Maxime Ripard, Chen-Yu Tsai, Mike Marciniszyn,
Dennis Dalessandro, Yishai Hadas, Moni Shoua, David Woodhouse,
Joerg Roedel, Tom Lendacky, Mirko Lindner, Stephen Hemminger,
Jiri Pirko, Solarflare linux maintainers, Edward Cree,
Martin Habets, Bjorn Helgaas, Eric Biederman, Thomas Graf,
Herbert Xu
Cc: baolu.lu, james.quinlan, mbrugger, f.fainelli, phil, wahrenst,
jeremy.linton, linux-pci, linux-rpi-kernel, Robin Murphy,
Doug Ledford, Jason Gunthorpe, David S. Miller, Trond Myklebust,
Anna Schumaker, J. Bruce Fields, Chuck Lever, linux-clk,
linux-arm-kernel, linux-rdma, iommu, netdev, kexec, linux-nfs
Hi,
On 12/3/19 7:47 PM, Nicolas Saenz Julienne wrote:
> Some users need to make sure their rounding function accepts and returns
> 64bit long variables regardless of the architecture. Sadly
> roundup/rounddown_pow_two() takes and returns unsigned longs. It turns
> out ilog2() already handles 32/64bit calculations properly, and being
> the building block to the round functions we can rework them as a
> wrapper around it.
>
> Suggested-by: Robin Murphy <robin.murphy@arm.con>
> Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
> ---
> drivers/clk/clk-divider.c | 8 ++--
> drivers/clk/sunxi/clk-sunxi.c | 2 +-
> drivers/infiniband/hw/hfi1/chip.c | 4 +-
> drivers/infiniband/hw/hfi1/init.c | 4 +-
> drivers/infiniband/hw/mlx4/srq.c | 2 +-
> drivers/infiniband/hw/mthca/mthca_srq.c | 2 +-
> drivers/infiniband/sw/rxe/rxe_qp.c | 4 +-
> drivers/iommu/intel-iommu.c | 4 +-
> drivers/iommu/intel-svm.c | 4 +-
> drivers/iommu/intel_irq_remapping.c | 2 +-
For changes in drivers/iommu/intel*.c,
Reviewed-by: Lu Baolu <baolu.lu@linux.intel.com>
Best regards,
baolu
> drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c | 4 +-
> drivers/net/ethernet/marvell/sky2.c | 2 +-
> drivers/net/ethernet/rocker/rocker_hw.h | 4 +-
> drivers/net/ethernet/sfc/ef10.c | 2 +-
> drivers/net/ethernet/sfc/efx.h | 2 +-
> drivers/net/ethernet/sfc/falcon/efx.h | 2 +-
> drivers/pci/msi.c | 2 +-
> include/linux/log2.h | 44 +++++---------------
> kernel/kexec_core.c | 3 +-
> lib/rhashtable.c | 2 +-
> net/sunrpc/xprtrdma/verbs.c | 2 +-
> 21 files changed, 41 insertions(+), 64 deletions(-)
>
> diff --git a/drivers/clk/clk-divider.c b/drivers/clk/clk-divider.c
> index 098b2b01f0af..ba947e4c8193 100644
> --- a/drivers/clk/clk-divider.c
> +++ b/drivers/clk/clk-divider.c
> @@ -222,7 +222,7 @@ static int _div_round_up(const struct clk_div_table *table,
> int div = DIV_ROUND_UP_ULL((u64)parent_rate, rate);
>
> if (flags & CLK_DIVIDER_POWER_OF_TWO)
> - div = __roundup_pow_of_two(div);
> + div = roundup_pow_of_two(div);
> if (table)
> div = _round_up_table(table, div);
>
> @@ -240,8 +240,8 @@ static int _div_round_closest(const struct clk_div_table *table,
> down = parent_rate / rate;
>
> if (flags & CLK_DIVIDER_POWER_OF_TWO) {
> - up = __roundup_pow_of_two(up);
> - down = __rounddown_pow_of_two(down);
> + up = roundup_pow_of_two(up);
> + down = rounddown_pow_of_two(down);
> } else if (table) {
> up = _round_up_table(table, up);
> down = _round_down_table(table, down);
> @@ -278,7 +278,7 @@ static int _next_div(const struct clk_div_table *table, int div,
> div++;
>
> if (flags & CLK_DIVIDER_POWER_OF_TWO)
> - return __roundup_pow_of_two(div);
> + return roundup_pow_of_two(div);
> if (table)
> return _round_up_table(table, div);
>
> diff --git a/drivers/clk/sunxi/clk-sunxi.c b/drivers/clk/sunxi/clk-sunxi.c
> index 27201fd26e44..faec99dc09c0 100644
> --- a/drivers/clk/sunxi/clk-sunxi.c
> +++ b/drivers/clk/sunxi/clk-sunxi.c
> @@ -311,7 +311,7 @@ static void sun6i_get_ahb1_factors(struct factors_request *req)
>
> calcm = DIV_ROUND_UP(div, 1 << calcp);
> } else {
> - calcp = __roundup_pow_of_two(div);
> + calcp = roundup_pow_of_two(div);
> calcp = calcp > 3 ? 3 : calcp;
> }
>
> diff --git a/drivers/infiniband/hw/hfi1/chip.c b/drivers/infiniband/hw/hfi1/chip.c
> index 9b1fb84a3d45..96b1d343c32f 100644
> --- a/drivers/infiniband/hw/hfi1/chip.c
> +++ b/drivers/infiniband/hw/hfi1/chip.c
> @@ -14199,10 +14199,10 @@ static int qos_rmt_entries(struct hfi1_devdata *dd, unsigned int *mp,
> max_by_vl = krcvqs[i];
> if (max_by_vl > 32)
> goto no_qos;
> - m = ilog2(__roundup_pow_of_two(max_by_vl));
> + m = ilog2(roundup_pow_of_two(max_by_vl));
>
> /* determine bits for vl */
> - n = ilog2(__roundup_pow_of_two(num_vls));
> + n = ilog2(roundup_pow_of_two(num_vls));
>
> /* reject if too much is used */
> if ((m + n) > 7)
> diff --git a/drivers/infiniband/hw/hfi1/init.c b/drivers/infiniband/hw/hfi1/init.c
> index 26b792bb1027..838c789c7cce 100644
> --- a/drivers/infiniband/hw/hfi1/init.c
> +++ b/drivers/infiniband/hw/hfi1/init.c
> @@ -467,7 +467,7 @@ int hfi1_create_ctxtdata(struct hfi1_pportdata *ppd, int numa,
> * MTU supported.
> */
> if (rcd->egrbufs.size < hfi1_max_mtu) {
> - rcd->egrbufs.size = __roundup_pow_of_two(hfi1_max_mtu);
> + rcd->egrbufs.size = roundup_pow_of_two(hfi1_max_mtu);
> hfi1_cdbg(PROC,
> "ctxt%u: eager bufs size too small. Adjusting to %u\n",
> rcd->ctxt, rcd->egrbufs.size);
> @@ -1959,7 +1959,7 @@ int hfi1_setup_eagerbufs(struct hfi1_ctxtdata *rcd)
> * to satisfy the "multiple of 8 RcvArray entries" requirement.
> */
> if (rcd->egrbufs.size <= (1 << 20))
> - rcd->egrbufs.rcvtid_size = max((unsigned long)round_mtu,
> + rcd->egrbufs.rcvtid_size = max((unsigned long long)round_mtu,
> rounddown_pow_of_two(rcd->egrbufs.size / 8));
>
> while (alloced_bytes < rcd->egrbufs.size &&
> diff --git a/drivers/infiniband/hw/mlx4/srq.c b/drivers/infiniband/hw/mlx4/srq.c
> index 8dcf6e3d9ae2..7e685600a7b3 100644
> --- a/drivers/infiniband/hw/mlx4/srq.c
> +++ b/drivers/infiniband/hw/mlx4/srq.c
> @@ -96,7 +96,7 @@ int mlx4_ib_create_srq(struct ib_srq *ib_srq,
> srq->msrq.max = roundup_pow_of_two(init_attr->attr.max_wr + 1);
> srq->msrq.max_gs = init_attr->attr.max_sge;
>
> - desc_size = max(32UL,
> + desc_size = max(32ULL,
> roundup_pow_of_two(sizeof (struct mlx4_wqe_srq_next_seg) +
> srq->msrq.max_gs *
> sizeof (struct mlx4_wqe_data_seg)));
> diff --git a/drivers/infiniband/hw/mthca/mthca_srq.c b/drivers/infiniband/hw/mthca/mthca_srq.c
> index a85935ccce88..0c2e14b4142a 100644
> --- a/drivers/infiniband/hw/mthca/mthca_srq.c
> +++ b/drivers/infiniband/hw/mthca/mthca_srq.c
> @@ -225,7 +225,7 @@ int mthca_alloc_srq(struct mthca_dev *dev, struct mthca_pd *pd,
> else
> srq->max = srq->max + 1;
>
> - ds = max(64UL,
> + ds = max(64ULL,
> roundup_pow_of_two(sizeof (struct mthca_next_seg) +
> srq->max_gs * sizeof (struct mthca_data_seg)));
>
> diff --git a/drivers/infiniband/sw/rxe/rxe_qp.c b/drivers/infiniband/sw/rxe/rxe_qp.c
> index e2c6d1cedf41..040b707b0877 100644
> --- a/drivers/infiniband/sw/rxe/rxe_qp.c
> +++ b/drivers/infiniband/sw/rxe/rxe_qp.c
> @@ -592,7 +592,7 @@ int rxe_qp_from_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask,
> int err;
>
> if (mask & IB_QP_MAX_QP_RD_ATOMIC) {
> - int max_rd_atomic = __roundup_pow_of_two(attr->max_rd_atomic);
> + int max_rd_atomic = roundup_pow_of_two(attr->max_rd_atomic);
>
> qp->attr.max_rd_atomic = max_rd_atomic;
> atomic_set(&qp->req.rd_atomic, max_rd_atomic);
> @@ -600,7 +600,7 @@ int rxe_qp_from_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask,
>
> if (mask & IB_QP_MAX_DEST_RD_ATOMIC) {
> int max_dest_rd_atomic =
> - __roundup_pow_of_two(attr->max_dest_rd_atomic);
> + roundup_pow_of_two(attr->max_dest_rd_atomic);
>
> qp->attr.max_dest_rd_atomic = max_dest_rd_atomic;
>
> diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
> index 0c8d81f56a30..ce7c900bd666 100644
> --- a/drivers/iommu/intel-iommu.c
> +++ b/drivers/iommu/intel-iommu.c
> @@ -1488,7 +1488,7 @@ static void iommu_flush_iotlb_psi(struct intel_iommu *iommu,
> unsigned long pfn, unsigned int pages,
> int ih, int map)
> {
> - unsigned int mask = ilog2(__roundup_pow_of_two(pages));
> + unsigned int mask = ilog2(roundup_pow_of_two(pages));
> uint64_t addr = (uint64_t)pfn << VTD_PAGE_SHIFT;
> u16 did = domain->iommu_did[iommu->seq_id];
>
> @@ -3390,7 +3390,7 @@ static unsigned long intel_alloc_iova(struct device *dev,
> /* Restrict dma_mask to the width that the iommu can handle */
> dma_mask = min_t(uint64_t, DOMAIN_MAX_ADDR(domain->gaw), dma_mask);
> /* Ensure we reserve the whole size-aligned region */
> - nrpages = __roundup_pow_of_two(nrpages);
> + nrpages = roundup_pow_of_two(nrpages);
>
> if (!dmar_forcedac && dma_mask > DMA_BIT_MASK(32)) {
> /*
> diff --git a/drivers/iommu/intel-svm.c b/drivers/iommu/intel-svm.c
> index 9b159132405d..602caca3cd1a 100644
> --- a/drivers/iommu/intel-svm.c
> +++ b/drivers/iommu/intel-svm.c
> @@ -115,7 +115,7 @@ static void intel_flush_svm_range_dev (struct intel_svm *svm, struct intel_svm_d
> QI_EIOTLB_TYPE;
> desc.qw1 = 0;
> } else {
> - int mask = ilog2(__roundup_pow_of_two(pages));
> + int mask = ilog2(roundup_pow_of_two(pages));
>
> desc.qw0 = QI_EIOTLB_PASID(svm->pasid) |
> QI_EIOTLB_DID(sdev->did) |
> @@ -142,7 +142,7 @@ static void intel_flush_svm_range_dev (struct intel_svm *svm, struct intel_svm_d
> * for example, an "address" value of 0x12345f000 will
> * flush from 0x123440000 to 0x12347ffff (256KiB). */
> unsigned long last = address + ((unsigned long)(pages - 1) << VTD_PAGE_SHIFT);
> - unsigned long mask = __rounddown_pow_of_two(address ^ last);
> + unsigned long mask = rounddown_pow_of_two(address ^ last);
>
> desc.qw1 = QI_DEV_EIOTLB_ADDR((address & ~mask) |
> (mask - 1)) | QI_DEV_EIOTLB_SIZE;
> diff --git a/drivers/iommu/intel_irq_remapping.c b/drivers/iommu/intel_irq_remapping.c
> index 81e43c1df7ec..935657b2c661 100644
> --- a/drivers/iommu/intel_irq_remapping.c
> +++ b/drivers/iommu/intel_irq_remapping.c
> @@ -113,7 +113,7 @@ static int alloc_irte(struct intel_iommu *iommu,
> return -1;
>
> if (count > 1) {
> - count = __roundup_pow_of_two(count);
> + count = roundup_pow_of_two(count);
> mask = ilog2(count);
> }
>
> diff --git a/drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c b/drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c
> index 6a757dadb5f1..fd5b12c23eaa 100644
> --- a/drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c
> +++ b/drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c
> @@ -680,13 +680,13 @@ static int xgbe_set_ringparam(struct net_device *netdev,
> return -EINVAL;
> }
>
> - rx = __rounddown_pow_of_two(ringparam->rx_pending);
> + rx = rounddown_pow_of_two(ringparam->rx_pending);
> if (rx != ringparam->rx_pending)
> netdev_notice(netdev,
> "rx ring parameter rounded to power of two: %u\n",
> rx);
>
> - tx = __rounddown_pow_of_two(ringparam->tx_pending);
> + tx = rounddown_pow_of_two(ringparam->tx_pending);
> if (tx != ringparam->tx_pending)
> netdev_notice(netdev,
> "tx ring parameter rounded to power of two: %u\n",
> diff --git a/drivers/net/ethernet/marvell/sky2.c b/drivers/net/ethernet/marvell/sky2.c
> index 5f56ee83e3b1..cc3a03b4a611 100644
> --- a/drivers/net/ethernet/marvell/sky2.c
> +++ b/drivers/net/ethernet/marvell/sky2.c
> @@ -4139,7 +4139,7 @@ static int sky2_set_coalesce(struct net_device *dev,
> */
> static unsigned long roundup_ring_size(unsigned long pending)
> {
> - return max(128ul, roundup_pow_of_two(pending+1));
> + return max(128ull, roundup_pow_of_two(pending+1));
> }
>
> static void sky2_get_ringparam(struct net_device *dev,
> diff --git a/drivers/net/ethernet/rocker/rocker_hw.h b/drivers/net/ethernet/rocker/rocker_hw.h
> index 59f1f8b690d2..d8de15509e2c 100644
> --- a/drivers/net/ethernet/rocker/rocker_hw.h
> +++ b/drivers/net/ethernet/rocker/rocker_hw.h
> @@ -88,8 +88,8 @@ enum rocker_dma_type {
> };
>
> /* Rocker DMA ring size limits and default sizes */
> -#define ROCKER_DMA_SIZE_MIN 2ul
> -#define ROCKER_DMA_SIZE_MAX 65536ul
> +#define ROCKER_DMA_SIZE_MIN 2ull
> +#define ROCKER_DMA_SIZE_MAX 65536ull
> #define ROCKER_DMA_CMD_DEFAULT_SIZE 32ul
> #define ROCKER_DMA_EVENT_DEFAULT_SIZE 32ul
> #define ROCKER_DMA_TX_DEFAULT_SIZE 64ul
> diff --git a/drivers/net/ethernet/sfc/ef10.c b/drivers/net/ethernet/sfc/ef10.c
> index 4d9bbccc6f89..4f4d9a5b3b75 100644
> --- a/drivers/net/ethernet/sfc/ef10.c
> +++ b/drivers/net/ethernet/sfc/ef10.c
> @@ -27,7 +27,7 @@ enum {
> };
> /* The maximum size of a shared RSS context */
> /* TODO: this should really be from the mcdi protocol export */
> -#define EFX_EF10_MAX_SHARED_RSS_CONTEXT_SIZE 64UL
> +#define EFX_EF10_MAX_SHARED_RSS_CONTEXT_SIZE 64ULL
>
> /* The filter table(s) are managed by firmware and we have write-only
> * access. When removing filters we must identify them to the
> diff --git a/drivers/net/ethernet/sfc/efx.h b/drivers/net/ethernet/sfc/efx.h
> index 2dd8d5002315..fea2add5860e 100644
> --- a/drivers/net/ethernet/sfc/efx.h
> +++ b/drivers/net/ethernet/sfc/efx.h
> @@ -52,7 +52,7 @@ void efx_schedule_slow_fill(struct efx_rx_queue *rx_queue);
>
> #define EFX_MAX_DMAQ_SIZE 4096UL
> #define EFX_DEFAULT_DMAQ_SIZE 1024UL
> -#define EFX_MIN_DMAQ_SIZE 512UL
> +#define EFX_MIN_DMAQ_SIZE 512ULL
>
> #define EFX_MAX_EVQ_SIZE 16384UL
> #define EFX_MIN_EVQ_SIZE 512UL
> diff --git a/drivers/net/ethernet/sfc/falcon/efx.h b/drivers/net/ethernet/sfc/falcon/efx.h
> index d3b4646545fa..0d16257156d6 100644
> --- a/drivers/net/ethernet/sfc/falcon/efx.h
> +++ b/drivers/net/ethernet/sfc/falcon/efx.h
> @@ -55,7 +55,7 @@ void ef4_schedule_slow_fill(struct ef4_rx_queue *rx_queue);
>
> #define EF4_MAX_DMAQ_SIZE 4096UL
> #define EF4_DEFAULT_DMAQ_SIZE 1024UL
> -#define EF4_MIN_DMAQ_SIZE 512UL
> +#define EF4_MIN_DMAQ_SIZE 512ULL
>
> #define EF4_MAX_EVQ_SIZE 16384UL
> #define EF4_MIN_EVQ_SIZE 512UL
> diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c
> index c7709e49f0e4..f0391e88bc42 100644
> --- a/drivers/pci/msi.c
> +++ b/drivers/pci/msi.c
> @@ -578,7 +578,7 @@ msi_setup_entry(struct pci_dev *dev, int nvec, struct irq_affinity *affd)
> entry->msi_attrib.maskbit = !!(control & PCI_MSI_FLAGS_MASKBIT);
> entry->msi_attrib.default_irq = dev->irq; /* Save IOAPIC IRQ */
> entry->msi_attrib.multi_cap = (control & PCI_MSI_FLAGS_QMASK) >> 1;
> - entry->msi_attrib.multiple = ilog2(__roundup_pow_of_two(nvec));
> + entry->msi_attrib.multiple = ilog2(roundup_pow_of_two(nvec));
>
> if (control & PCI_MSI_FLAGS_64BIT)
> entry->mask_pos = dev->msi_cap + PCI_MSI_MASK_64;
> diff --git a/include/linux/log2.h b/include/linux/log2.h
> index 83a4a3ca3e8a..53a727303dac 100644
> --- a/include/linux/log2.h
> +++ b/include/linux/log2.h
> @@ -47,26 +47,6 @@ bool is_power_of_2(unsigned long n)
> return (n != 0 && ((n & (n - 1)) == 0));
> }
>
> -/**
> - * __roundup_pow_of_two() - round up to nearest power of two
> - * @n: value to round up
> - */
> -static inline __attribute__((const))
> -unsigned long __roundup_pow_of_two(unsigned long n)
> -{
> - return 1UL << fls_long(n - 1);
> -}
> -
> -/**
> - * __rounddown_pow_of_two() - round down to nearest power of two
> - * @n: value to round down
> - */
> -static inline __attribute__((const))
> -unsigned long __rounddown_pow_of_two(unsigned long n)
> -{
> - return 1UL << (fls_long(n) - 1);
> -}
> -
> /**
> * const_ilog2 - log base 2 of 32-bit or a 64-bit constant unsigned value
> * @n: parameter
> @@ -170,14 +150,11 @@ unsigned long __rounddown_pow_of_two(unsigned long n)
> * - the result is undefined when n == 0
> * - this can be used to initialise global variables from constant data
> */
> -#define roundup_pow_of_two(n) \
> -( \
> - __builtin_constant_p(n) ? ( \
> - (n == 1) ? 1 : \
> - (1UL << (ilog2((n) - 1) + 1)) \
> - ) : \
> - __roundup_pow_of_two(n) \
> - )
> +#define roundup_pow_of_two(n) \
> +( \
> + (__builtin_constant_p(n) && ((n) == 1)) ? \
> + 1 : (1ULL << (ilog2((n) - 1) + 1)) \
> +)
>
> /**
> * rounddown_pow_of_two - round the given value down to nearest power of two
> @@ -187,12 +164,11 @@ unsigned long __rounddown_pow_of_two(unsigned long n)
> * - the result is undefined when n == 0
> * - this can be used to initialise global variables from constant data
> */
> -#define rounddown_pow_of_two(n) \
> -( \
> - __builtin_constant_p(n) ? ( \
> - (1UL << ilog2(n))) : \
> - __rounddown_pow_of_two(n) \
> - )
> +#define rounddown_pow_of_two(n) \
> +( \
> + (__builtin_constant_p(n) && ((n) == 1)) ? \
> + 1 : (1ULL << (ilog2(n))) \
> +)
>
> static inline __attribute_const__
> int __order_base_2(unsigned long n)
> diff --git a/kernel/kexec_core.c b/kernel/kexec_core.c
> index 15d70a90b50d..bb9efc6944a4 100644
> --- a/kernel/kexec_core.c
> +++ b/kernel/kexec_core.c
> @@ -1094,7 +1094,8 @@ static int __init crash_notes_memory_init(void)
> * crash_notes is allocated inside one physical page.
> */
> size = sizeof(note_buf_t);
> - align = min(roundup_pow_of_two(sizeof(note_buf_t)), PAGE_SIZE);
> + align = min(roundup_pow_of_two(sizeof(note_buf_t)),
> + (unsigned long long)PAGE_SIZE);
>
> /*
> * Break compile if size is bigger than PAGE_SIZE since crash_notes
> diff --git a/lib/rhashtable.c b/lib/rhashtable.c
> index bdb7e4cadf05..70908678c7a8 100644
> --- a/lib/rhashtable.c
> +++ b/lib/rhashtable.c
> @@ -950,7 +950,7 @@ static size_t rounded_hashtable_size(const struct rhashtable_params *params)
>
> if (params->nelem_hint)
> retsize = max(roundup_pow_of_two(params->nelem_hint * 4 / 3),
> - (unsigned long)params->min_size);
> + (unsigned long long)params->min_size);
> else
> retsize = max(HASH_DEFAULT_SIZE,
> (unsigned long)params->min_size);
> diff --git a/net/sunrpc/xprtrdma/verbs.c b/net/sunrpc/xprtrdma/verbs.c
> index 77c7dd7f05e8..78fb8ccabddd 100644
> --- a/net/sunrpc/xprtrdma/verbs.c
> +++ b/net/sunrpc/xprtrdma/verbs.c
> @@ -1015,7 +1015,7 @@ struct rpcrdma_req *rpcrdma_req_create(struct rpcrdma_xprt *r_xprt, size_t size,
> maxhdrsize = rpcrdma_fixed_maxsz + 3 +
> r_xprt->rx_ia.ri_max_segs * rpcrdma_readchunk_maxsz;
> maxhdrsize *= sizeof(__be32);
> - rb = rpcrdma_regbuf_alloc(__roundup_pow_of_two(maxhdrsize),
> + rb = rpcrdma_regbuf_alloc(roundup_pow_of_two(maxhdrsize),
> DMA_TO_DEVICE, flags);
> if (!rb)
> goto out2;
>
^ permalink raw reply [flat|nested] 71+ messages in thread
* Re: [PATCH v4 7/8] linux/log2.h: Fix 64bit calculations in roundup/down_pow_two()
@ 2019-12-05 0:39 ` Lu Baolu
0 siblings, 0 replies; 71+ messages in thread
From: Lu Baolu @ 2019-12-05 0:39 UTC (permalink / raw)
To: Nicolas Saenz Julienne, andrew.murray, maz, linux-kernel,
Michael Turquette, Stephen Boyd, Emilio López,
Maxime Ripard, Chen-Yu Tsai, Mike Marciniszyn,
Dennis Dalessandro, Yishai Hadas, Moni Shoua, David Woodhouse,
Joerg Roedel, Tom Lendacky, Mirko Lindner, Stephen Hemminger,
Jiri Pirko, Solarflare linux maintainers, Edward Cree,
Martin Habets, Bjorn Helgaas, Eric Biederman, Thomas Graf,
Herbert Xu
Cc: linux-pci, J. Bruce Fields, linux-clk, f.fainelli, linux-rdma,
phil, Jason Gunthorpe, Doug Ledford, linux-rpi-kernel,
Trond Myklebust, linux-arm-kernel, linux-nfs, mbrugger, netdev,
kexec, jeremy.linton, David S. Miller, iommu, Chuck Lever,
wahrenst, james.quinlan, Anna Schumaker, Robin Murphy
Hi,
On 12/3/19 7:47 PM, Nicolas Saenz Julienne wrote:
> Some users need to make sure their rounding function accepts and returns
> 64bit long variables regardless of the architecture. Sadly
> roundup/rounddown_pow_two() takes and returns unsigned longs. It turns
> out ilog2() already handles 32/64bit calculations properly, and being
> the building block to the round functions we can rework them as a
> wrapper around it.
>
> Suggested-by: Robin Murphy <robin.murphy@arm.con>
> Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
> ---
> drivers/clk/clk-divider.c | 8 ++--
> drivers/clk/sunxi/clk-sunxi.c | 2 +-
> drivers/infiniband/hw/hfi1/chip.c | 4 +-
> drivers/infiniband/hw/hfi1/init.c | 4 +-
> drivers/infiniband/hw/mlx4/srq.c | 2 +-
> drivers/infiniband/hw/mthca/mthca_srq.c | 2 +-
> drivers/infiniband/sw/rxe/rxe_qp.c | 4 +-
> drivers/iommu/intel-iommu.c | 4 +-
> drivers/iommu/intel-svm.c | 4 +-
> drivers/iommu/intel_irq_remapping.c | 2 +-
For changes in drivers/iommu/intel*.c,
Reviewed-by: Lu Baolu <baolu.lu@linux.intel.com>
Best regards,
baolu
> drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c | 4 +-
> drivers/net/ethernet/marvell/sky2.c | 2 +-
> drivers/net/ethernet/rocker/rocker_hw.h | 4 +-
> drivers/net/ethernet/sfc/ef10.c | 2 +-
> drivers/net/ethernet/sfc/efx.h | 2 +-
> drivers/net/ethernet/sfc/falcon/efx.h | 2 +-
> drivers/pci/msi.c | 2 +-
> include/linux/log2.h | 44 +++++---------------
> kernel/kexec_core.c | 3 +-
> lib/rhashtable.c | 2 +-
> net/sunrpc/xprtrdma/verbs.c | 2 +-
> 21 files changed, 41 insertions(+), 64 deletions(-)
>
> diff --git a/drivers/clk/clk-divider.c b/drivers/clk/clk-divider.c
> index 098b2b01f0af..ba947e4c8193 100644
> --- a/drivers/clk/clk-divider.c
> +++ b/drivers/clk/clk-divider.c
> @@ -222,7 +222,7 @@ static int _div_round_up(const struct clk_div_table *table,
> int div = DIV_ROUND_UP_ULL((u64)parent_rate, rate);
>
> if (flags & CLK_DIVIDER_POWER_OF_TWO)
> - div = __roundup_pow_of_two(div);
> + div = roundup_pow_of_two(div);
> if (table)
> div = _round_up_table(table, div);
>
> @@ -240,8 +240,8 @@ static int _div_round_closest(const struct clk_div_table *table,
> down = parent_rate / rate;
>
> if (flags & CLK_DIVIDER_POWER_OF_TWO) {
> - up = __roundup_pow_of_two(up);
> - down = __rounddown_pow_of_two(down);
> + up = roundup_pow_of_two(up);
> + down = rounddown_pow_of_two(down);
> } else if (table) {
> up = _round_up_table(table, up);
> down = _round_down_table(table, down);
> @@ -278,7 +278,7 @@ static int _next_div(const struct clk_div_table *table, int div,
> div++;
>
> if (flags & CLK_DIVIDER_POWER_OF_TWO)
> - return __roundup_pow_of_two(div);
> + return roundup_pow_of_two(div);
> if (table)
> return _round_up_table(table, div);
>
> diff --git a/drivers/clk/sunxi/clk-sunxi.c b/drivers/clk/sunxi/clk-sunxi.c
> index 27201fd26e44..faec99dc09c0 100644
> --- a/drivers/clk/sunxi/clk-sunxi.c
> +++ b/drivers/clk/sunxi/clk-sunxi.c
> @@ -311,7 +311,7 @@ static void sun6i_get_ahb1_factors(struct factors_request *req)
>
> calcm = DIV_ROUND_UP(div, 1 << calcp);
> } else {
> - calcp = __roundup_pow_of_two(div);
> + calcp = roundup_pow_of_two(div);
> calcp = calcp > 3 ? 3 : calcp;
> }
>
> diff --git a/drivers/infiniband/hw/hfi1/chip.c b/drivers/infiniband/hw/hfi1/chip.c
> index 9b1fb84a3d45..96b1d343c32f 100644
> --- a/drivers/infiniband/hw/hfi1/chip.c
> +++ b/drivers/infiniband/hw/hfi1/chip.c
> @@ -14199,10 +14199,10 @@ static int qos_rmt_entries(struct hfi1_devdata *dd, unsigned int *mp,
> max_by_vl = krcvqs[i];
> if (max_by_vl > 32)
> goto no_qos;
> - m = ilog2(__roundup_pow_of_two(max_by_vl));
> + m = ilog2(roundup_pow_of_two(max_by_vl));
>
> /* determine bits for vl */
> - n = ilog2(__roundup_pow_of_two(num_vls));
> + n = ilog2(roundup_pow_of_two(num_vls));
>
> /* reject if too much is used */
> if ((m + n) > 7)
> diff --git a/drivers/infiniband/hw/hfi1/init.c b/drivers/infiniband/hw/hfi1/init.c
> index 26b792bb1027..838c789c7cce 100644
> --- a/drivers/infiniband/hw/hfi1/init.c
> +++ b/drivers/infiniband/hw/hfi1/init.c
> @@ -467,7 +467,7 @@ int hfi1_create_ctxtdata(struct hfi1_pportdata *ppd, int numa,
> * MTU supported.
> */
> if (rcd->egrbufs.size < hfi1_max_mtu) {
> - rcd->egrbufs.size = __roundup_pow_of_two(hfi1_max_mtu);
> + rcd->egrbufs.size = roundup_pow_of_two(hfi1_max_mtu);
> hfi1_cdbg(PROC,
> "ctxt%u: eager bufs size too small. Adjusting to %u\n",
> rcd->ctxt, rcd->egrbufs.size);
> @@ -1959,7 +1959,7 @@ int hfi1_setup_eagerbufs(struct hfi1_ctxtdata *rcd)
> * to satisfy the "multiple of 8 RcvArray entries" requirement.
> */
> if (rcd->egrbufs.size <= (1 << 20))
> - rcd->egrbufs.rcvtid_size = max((unsigned long)round_mtu,
> + rcd->egrbufs.rcvtid_size = max((unsigned long long)round_mtu,
> rounddown_pow_of_two(rcd->egrbufs.size / 8));
>
> while (alloced_bytes < rcd->egrbufs.size &&
> diff --git a/drivers/infiniband/hw/mlx4/srq.c b/drivers/infiniband/hw/mlx4/srq.c
> index 8dcf6e3d9ae2..7e685600a7b3 100644
> --- a/drivers/infiniband/hw/mlx4/srq.c
> +++ b/drivers/infiniband/hw/mlx4/srq.c
> @@ -96,7 +96,7 @@ int mlx4_ib_create_srq(struct ib_srq *ib_srq,
> srq->msrq.max = roundup_pow_of_two(init_attr->attr.max_wr + 1);
> srq->msrq.max_gs = init_attr->attr.max_sge;
>
> - desc_size = max(32UL,
> + desc_size = max(32ULL,
> roundup_pow_of_two(sizeof (struct mlx4_wqe_srq_next_seg) +
> srq->msrq.max_gs *
> sizeof (struct mlx4_wqe_data_seg)));
> diff --git a/drivers/infiniband/hw/mthca/mthca_srq.c b/drivers/infiniband/hw/mthca/mthca_srq.c
> index a85935ccce88..0c2e14b4142a 100644
> --- a/drivers/infiniband/hw/mthca/mthca_srq.c
> +++ b/drivers/infiniband/hw/mthca/mthca_srq.c
> @@ -225,7 +225,7 @@ int mthca_alloc_srq(struct mthca_dev *dev, struct mthca_pd *pd,
> else
> srq->max = srq->max + 1;
>
> - ds = max(64UL,
> + ds = max(64ULL,
> roundup_pow_of_two(sizeof (struct mthca_next_seg) +
> srq->max_gs * sizeof (struct mthca_data_seg)));
>
> diff --git a/drivers/infiniband/sw/rxe/rxe_qp.c b/drivers/infiniband/sw/rxe/rxe_qp.c
> index e2c6d1cedf41..040b707b0877 100644
> --- a/drivers/infiniband/sw/rxe/rxe_qp.c
> +++ b/drivers/infiniband/sw/rxe/rxe_qp.c
> @@ -592,7 +592,7 @@ int rxe_qp_from_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask,
> int err;
>
> if (mask & IB_QP_MAX_QP_RD_ATOMIC) {
> - int max_rd_atomic = __roundup_pow_of_two(attr->max_rd_atomic);
> + int max_rd_atomic = roundup_pow_of_two(attr->max_rd_atomic);
>
> qp->attr.max_rd_atomic = max_rd_atomic;
> atomic_set(&qp->req.rd_atomic, max_rd_atomic);
> @@ -600,7 +600,7 @@ int rxe_qp_from_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask,
>
> if (mask & IB_QP_MAX_DEST_RD_ATOMIC) {
> int max_dest_rd_atomic =
> - __roundup_pow_of_two(attr->max_dest_rd_atomic);
> + roundup_pow_of_two(attr->max_dest_rd_atomic);
>
> qp->attr.max_dest_rd_atomic = max_dest_rd_atomic;
>
> diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
> index 0c8d81f56a30..ce7c900bd666 100644
> --- a/drivers/iommu/intel-iommu.c
> +++ b/drivers/iommu/intel-iommu.c
> @@ -1488,7 +1488,7 @@ static void iommu_flush_iotlb_psi(struct intel_iommu *iommu,
> unsigned long pfn, unsigned int pages,
> int ih, int map)
> {
> - unsigned int mask = ilog2(__roundup_pow_of_two(pages));
> + unsigned int mask = ilog2(roundup_pow_of_two(pages));
> uint64_t addr = (uint64_t)pfn << VTD_PAGE_SHIFT;
> u16 did = domain->iommu_did[iommu->seq_id];
>
> @@ -3390,7 +3390,7 @@ static unsigned long intel_alloc_iova(struct device *dev,
> /* Restrict dma_mask to the width that the iommu can handle */
> dma_mask = min_t(uint64_t, DOMAIN_MAX_ADDR(domain->gaw), dma_mask);
> /* Ensure we reserve the whole size-aligned region */
> - nrpages = __roundup_pow_of_two(nrpages);
> + nrpages = roundup_pow_of_two(nrpages);
>
> if (!dmar_forcedac && dma_mask > DMA_BIT_MASK(32)) {
> /*
> diff --git a/drivers/iommu/intel-svm.c b/drivers/iommu/intel-svm.c
> index 9b159132405d..602caca3cd1a 100644
> --- a/drivers/iommu/intel-svm.c
> +++ b/drivers/iommu/intel-svm.c
> @@ -115,7 +115,7 @@ static void intel_flush_svm_range_dev (struct intel_svm *svm, struct intel_svm_d
> QI_EIOTLB_TYPE;
> desc.qw1 = 0;
> } else {
> - int mask = ilog2(__roundup_pow_of_two(pages));
> + int mask = ilog2(roundup_pow_of_two(pages));
>
> desc.qw0 = QI_EIOTLB_PASID(svm->pasid) |
> QI_EIOTLB_DID(sdev->did) |
> @@ -142,7 +142,7 @@ static void intel_flush_svm_range_dev (struct intel_svm *svm, struct intel_svm_d
> * for example, an "address" value of 0x12345f000 will
> * flush from 0x123440000 to 0x12347ffff (256KiB). */
> unsigned long last = address + ((unsigned long)(pages - 1) << VTD_PAGE_SHIFT);
> - unsigned long mask = __rounddown_pow_of_two(address ^ last);
> + unsigned long mask = rounddown_pow_of_two(address ^ last);
>
> desc.qw1 = QI_DEV_EIOTLB_ADDR((address & ~mask) |
> (mask - 1)) | QI_DEV_EIOTLB_SIZE;
> diff --git a/drivers/iommu/intel_irq_remapping.c b/drivers/iommu/intel_irq_remapping.c
> index 81e43c1df7ec..935657b2c661 100644
> --- a/drivers/iommu/intel_irq_remapping.c
> +++ b/drivers/iommu/intel_irq_remapping.c
> @@ -113,7 +113,7 @@ static int alloc_irte(struct intel_iommu *iommu,
> return -1;
>
> if (count > 1) {
> - count = __roundup_pow_of_two(count);
> + count = roundup_pow_of_two(count);
> mask = ilog2(count);
> }
>
> diff --git a/drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c b/drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c
> index 6a757dadb5f1..fd5b12c23eaa 100644
> --- a/drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c
> +++ b/drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c
> @@ -680,13 +680,13 @@ static int xgbe_set_ringparam(struct net_device *netdev,
> return -EINVAL;
> }
>
> - rx = __rounddown_pow_of_two(ringparam->rx_pending);
> + rx = rounddown_pow_of_two(ringparam->rx_pending);
> if (rx != ringparam->rx_pending)
> netdev_notice(netdev,
> "rx ring parameter rounded to power of two: %u\n",
> rx);
>
> - tx = __rounddown_pow_of_two(ringparam->tx_pending);
> + tx = rounddown_pow_of_two(ringparam->tx_pending);
> if (tx != ringparam->tx_pending)
> netdev_notice(netdev,
> "tx ring parameter rounded to power of two: %u\n",
> diff --git a/drivers/net/ethernet/marvell/sky2.c b/drivers/net/ethernet/marvell/sky2.c
> index 5f56ee83e3b1..cc3a03b4a611 100644
> --- a/drivers/net/ethernet/marvell/sky2.c
> +++ b/drivers/net/ethernet/marvell/sky2.c
> @@ -4139,7 +4139,7 @@ static int sky2_set_coalesce(struct net_device *dev,
> */
> static unsigned long roundup_ring_size(unsigned long pending)
> {
> - return max(128ul, roundup_pow_of_two(pending+1));
> + return max(128ull, roundup_pow_of_two(pending+1));
> }
>
> static void sky2_get_ringparam(struct net_device *dev,
> diff --git a/drivers/net/ethernet/rocker/rocker_hw.h b/drivers/net/ethernet/rocker/rocker_hw.h
> index 59f1f8b690d2..d8de15509e2c 100644
> --- a/drivers/net/ethernet/rocker/rocker_hw.h
> +++ b/drivers/net/ethernet/rocker/rocker_hw.h
> @@ -88,8 +88,8 @@ enum rocker_dma_type {
> };
>
> /* Rocker DMA ring size limits and default sizes */
> -#define ROCKER_DMA_SIZE_MIN 2ul
> -#define ROCKER_DMA_SIZE_MAX 65536ul
> +#define ROCKER_DMA_SIZE_MIN 2ull
> +#define ROCKER_DMA_SIZE_MAX 65536ull
> #define ROCKER_DMA_CMD_DEFAULT_SIZE 32ul
> #define ROCKER_DMA_EVENT_DEFAULT_SIZE 32ul
> #define ROCKER_DMA_TX_DEFAULT_SIZE 64ul
> diff --git a/drivers/net/ethernet/sfc/ef10.c b/drivers/net/ethernet/sfc/ef10.c
> index 4d9bbccc6f89..4f4d9a5b3b75 100644
> --- a/drivers/net/ethernet/sfc/ef10.c
> +++ b/drivers/net/ethernet/sfc/ef10.c
> @@ -27,7 +27,7 @@ enum {
> };
> /* The maximum size of a shared RSS context */
> /* TODO: this should really be from the mcdi protocol export */
> -#define EFX_EF10_MAX_SHARED_RSS_CONTEXT_SIZE 64UL
> +#define EFX_EF10_MAX_SHARED_RSS_CONTEXT_SIZE 64ULL
>
> /* The filter table(s) are managed by firmware and we have write-only
> * access. When removing filters we must identify them to the
> diff --git a/drivers/net/ethernet/sfc/efx.h b/drivers/net/ethernet/sfc/efx.h
> index 2dd8d5002315..fea2add5860e 100644
> --- a/drivers/net/ethernet/sfc/efx.h
> +++ b/drivers/net/ethernet/sfc/efx.h
> @@ -52,7 +52,7 @@ void efx_schedule_slow_fill(struct efx_rx_queue *rx_queue);
>
> #define EFX_MAX_DMAQ_SIZE 4096UL
> #define EFX_DEFAULT_DMAQ_SIZE 1024UL
> -#define EFX_MIN_DMAQ_SIZE 512UL
> +#define EFX_MIN_DMAQ_SIZE 512ULL
>
> #define EFX_MAX_EVQ_SIZE 16384UL
> #define EFX_MIN_EVQ_SIZE 512UL
> diff --git a/drivers/net/ethernet/sfc/falcon/efx.h b/drivers/net/ethernet/sfc/falcon/efx.h
> index d3b4646545fa..0d16257156d6 100644
> --- a/drivers/net/ethernet/sfc/falcon/efx.h
> +++ b/drivers/net/ethernet/sfc/falcon/efx.h
> @@ -55,7 +55,7 @@ void ef4_schedule_slow_fill(struct ef4_rx_queue *rx_queue);
>
> #define EF4_MAX_DMAQ_SIZE 4096UL
> #define EF4_DEFAULT_DMAQ_SIZE 1024UL
> -#define EF4_MIN_DMAQ_SIZE 512UL
> +#define EF4_MIN_DMAQ_SIZE 512ULL
>
> #define EF4_MAX_EVQ_SIZE 16384UL
> #define EF4_MIN_EVQ_SIZE 512UL
> diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c
> index c7709e49f0e4..f0391e88bc42 100644
> --- a/drivers/pci/msi.c
> +++ b/drivers/pci/msi.c
> @@ -578,7 +578,7 @@ msi_setup_entry(struct pci_dev *dev, int nvec, struct irq_affinity *affd)
> entry->msi_attrib.maskbit = !!(control & PCI_MSI_FLAGS_MASKBIT);
> entry->msi_attrib.default_irq = dev->irq; /* Save IOAPIC IRQ */
> entry->msi_attrib.multi_cap = (control & PCI_MSI_FLAGS_QMASK) >> 1;
> - entry->msi_attrib.multiple = ilog2(__roundup_pow_of_two(nvec));
> + entry->msi_attrib.multiple = ilog2(roundup_pow_of_two(nvec));
>
> if (control & PCI_MSI_FLAGS_64BIT)
> entry->mask_pos = dev->msi_cap + PCI_MSI_MASK_64;
> diff --git a/include/linux/log2.h b/include/linux/log2.h
> index 83a4a3ca3e8a..53a727303dac 100644
> --- a/include/linux/log2.h
> +++ b/include/linux/log2.h
> @@ -47,26 +47,6 @@ bool is_power_of_2(unsigned long n)
> return (n != 0 && ((n & (n - 1)) == 0));
> }
>
> -/**
> - * __roundup_pow_of_two() - round up to nearest power of two
> - * @n: value to round up
> - */
> -static inline __attribute__((const))
> -unsigned long __roundup_pow_of_two(unsigned long n)
> -{
> - return 1UL << fls_long(n - 1);
> -}
> -
> -/**
> - * __rounddown_pow_of_two() - round down to nearest power of two
> - * @n: value to round down
> - */
> -static inline __attribute__((const))
> -unsigned long __rounddown_pow_of_two(unsigned long n)
> -{
> - return 1UL << (fls_long(n) - 1);
> -}
> -
> /**
> * const_ilog2 - log base 2 of 32-bit or a 64-bit constant unsigned value
> * @n: parameter
> @@ -170,14 +150,11 @@ unsigned long __rounddown_pow_of_two(unsigned long n)
> * - the result is undefined when n == 0
> * - this can be used to initialise global variables from constant data
> */
> -#define roundup_pow_of_two(n) \
> -( \
> - __builtin_constant_p(n) ? ( \
> - (n == 1) ? 1 : \
> - (1UL << (ilog2((n) - 1) + 1)) \
> - ) : \
> - __roundup_pow_of_two(n) \
> - )
> +#define roundup_pow_of_two(n) \
> +( \
> + (__builtin_constant_p(n) && ((n) == 1)) ? \
> + 1 : (1ULL << (ilog2((n) - 1) + 1)) \
> +)
>
> /**
> * rounddown_pow_of_two - round the given value down to nearest power of two
> @@ -187,12 +164,11 @@ unsigned long __rounddown_pow_of_two(unsigned long n)
> * - the result is undefined when n == 0
> * - this can be used to initialise global variables from constant data
> */
> -#define rounddown_pow_of_two(n) \
> -( \
> - __builtin_constant_p(n) ? ( \
> - (1UL << ilog2(n))) : \
> - __rounddown_pow_of_two(n) \
> - )
> +#define rounddown_pow_of_two(n) \
> +( \
> + (__builtin_constant_p(n) && ((n) == 1)) ? \
> + 1 : (1ULL << (ilog2(n))) \
> +)
>
> static inline __attribute_const__
> int __order_base_2(unsigned long n)
> diff --git a/kernel/kexec_core.c b/kernel/kexec_core.c
> index 15d70a90b50d..bb9efc6944a4 100644
> --- a/kernel/kexec_core.c
> +++ b/kernel/kexec_core.c
> @@ -1094,7 +1094,8 @@ static int __init crash_notes_memory_init(void)
> * crash_notes is allocated inside one physical page.
> */
> size = sizeof(note_buf_t);
> - align = min(roundup_pow_of_two(sizeof(note_buf_t)), PAGE_SIZE);
> + align = min(roundup_pow_of_two(sizeof(note_buf_t)),
> + (unsigned long long)PAGE_SIZE);
>
> /*
> * Break compile if size is bigger than PAGE_SIZE since crash_notes
> diff --git a/lib/rhashtable.c b/lib/rhashtable.c
> index bdb7e4cadf05..70908678c7a8 100644
> --- a/lib/rhashtable.c
> +++ b/lib/rhashtable.c
> @@ -950,7 +950,7 @@ static size_t rounded_hashtable_size(const struct rhashtable_params *params)
>
> if (params->nelem_hint)
> retsize = max(roundup_pow_of_two(params->nelem_hint * 4 / 3),
> - (unsigned long)params->min_size);
> + (unsigned long long)params->min_size);
> else
> retsize = max(HASH_DEFAULT_SIZE,
> (unsigned long)params->min_size);
> diff --git a/net/sunrpc/xprtrdma/verbs.c b/net/sunrpc/xprtrdma/verbs.c
> index 77c7dd7f05e8..78fb8ccabddd 100644
> --- a/net/sunrpc/xprtrdma/verbs.c
> +++ b/net/sunrpc/xprtrdma/verbs.c
> @@ -1015,7 +1015,7 @@ struct rpcrdma_req *rpcrdma_req_create(struct rpcrdma_xprt *r_xprt, size_t size,
> maxhdrsize = rpcrdma_fixed_maxsz + 3 +
> r_xprt->rx_ia.ri_max_segs * rpcrdma_readchunk_maxsz;
> maxhdrsize *= sizeof(__be32);
> - rb = rpcrdma_regbuf_alloc(__roundup_pow_of_two(maxhdrsize),
> + rb = rpcrdma_regbuf_alloc(roundup_pow_of_two(maxhdrsize),
> DMA_TO_DEVICE, flags);
> if (!rb)
> goto out2;
>
_______________________________________________
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^ permalink raw reply [flat|nested] 71+ messages in thread
* Re: [PATCH v4 7/8] linux/log2.h: Fix 64bit calculations in roundup/down_pow_two()
@ 2019-12-05 0:39 ` Lu Baolu
0 siblings, 0 replies; 71+ messages in thread
From: Lu Baolu @ 2019-12-05 0:39 UTC (permalink / raw)
To: Nicolas Saenz Julienne, andrew.murray, maz, linux-kernel,
Michael Turquette, Stephen Boyd, Emilio López,
Maxime Ripard, Chen-Yu Tsai, Mike Marciniszyn,
Dennis Dalessandro, Yishai Hadas, Moni Shoua, David Woodhouse,
Joerg Roedel, Tom Lendacky, Mirko Lindner, Stephen Hemminger,
Jiri Pirko, Solarflare linux maintainers, Edward Cree,
Martin Habets, Bjorn Helgaas, Eric Biederman, Thomas Graf,
Herbert Xu
Cc: linux-pci, J. Bruce Fields, linux-clk, f.fainelli, linux-rdma,
phil, Jason Gunthorpe, Doug Ledford, linux-rpi-kernel,
Trond Myklebust, linux-arm-kernel, linux-nfs, mbrugger, netdev,
kexec, jeremy.linton, David S. Miller, iommu, Chuck Lever,
wahrenst, james.quinlan, baolu.lu, Anna Schumaker, Robin Murphy
Hi,
On 12/3/19 7:47 PM, Nicolas Saenz Julienne wrote:
> Some users need to make sure their rounding function accepts and returns
> 64bit long variables regardless of the architecture. Sadly
> roundup/rounddown_pow_two() takes and returns unsigned longs. It turns
> out ilog2() already handles 32/64bit calculations properly, and being
> the building block to the round functions we can rework them as a
> wrapper around it.
>
> Suggested-by: Robin Murphy <robin.murphy@arm.con>
> Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
> ---
> drivers/clk/clk-divider.c | 8 ++--
> drivers/clk/sunxi/clk-sunxi.c | 2 +-
> drivers/infiniband/hw/hfi1/chip.c | 4 +-
> drivers/infiniband/hw/hfi1/init.c | 4 +-
> drivers/infiniband/hw/mlx4/srq.c | 2 +-
> drivers/infiniband/hw/mthca/mthca_srq.c | 2 +-
> drivers/infiniband/sw/rxe/rxe_qp.c | 4 +-
> drivers/iommu/intel-iommu.c | 4 +-
> drivers/iommu/intel-svm.c | 4 +-
> drivers/iommu/intel_irq_remapping.c | 2 +-
For changes in drivers/iommu/intel*.c,
Reviewed-by: Lu Baolu <baolu.lu@linux.intel.com>
Best regards,
baolu
> drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c | 4 +-
> drivers/net/ethernet/marvell/sky2.c | 2 +-
> drivers/net/ethernet/rocker/rocker_hw.h | 4 +-
> drivers/net/ethernet/sfc/ef10.c | 2 +-
> drivers/net/ethernet/sfc/efx.h | 2 +-
> drivers/net/ethernet/sfc/falcon/efx.h | 2 +-
> drivers/pci/msi.c | 2 +-
> include/linux/log2.h | 44 +++++---------------
> kernel/kexec_core.c | 3 +-
> lib/rhashtable.c | 2 +-
> net/sunrpc/xprtrdma/verbs.c | 2 +-
> 21 files changed, 41 insertions(+), 64 deletions(-)
>
> diff --git a/drivers/clk/clk-divider.c b/drivers/clk/clk-divider.c
> index 098b2b01f0af..ba947e4c8193 100644
> --- a/drivers/clk/clk-divider.c
> +++ b/drivers/clk/clk-divider.c
> @@ -222,7 +222,7 @@ static int _div_round_up(const struct clk_div_table *table,
> int div = DIV_ROUND_UP_ULL((u64)parent_rate, rate);
>
> if (flags & CLK_DIVIDER_POWER_OF_TWO)
> - div = __roundup_pow_of_two(div);
> + div = roundup_pow_of_two(div);
> if (table)
> div = _round_up_table(table, div);
>
> @@ -240,8 +240,8 @@ static int _div_round_closest(const struct clk_div_table *table,
> down = parent_rate / rate;
>
> if (flags & CLK_DIVIDER_POWER_OF_TWO) {
> - up = __roundup_pow_of_two(up);
> - down = __rounddown_pow_of_two(down);
> + up = roundup_pow_of_two(up);
> + down = rounddown_pow_of_two(down);
> } else if (table) {
> up = _round_up_table(table, up);
> down = _round_down_table(table, down);
> @@ -278,7 +278,7 @@ static int _next_div(const struct clk_div_table *table, int div,
> div++;
>
> if (flags & CLK_DIVIDER_POWER_OF_TWO)
> - return __roundup_pow_of_two(div);
> + return roundup_pow_of_two(div);
> if (table)
> return _round_up_table(table, div);
>
> diff --git a/drivers/clk/sunxi/clk-sunxi.c b/drivers/clk/sunxi/clk-sunxi.c
> index 27201fd26e44..faec99dc09c0 100644
> --- a/drivers/clk/sunxi/clk-sunxi.c
> +++ b/drivers/clk/sunxi/clk-sunxi.c
> @@ -311,7 +311,7 @@ static void sun6i_get_ahb1_factors(struct factors_request *req)
>
> calcm = DIV_ROUND_UP(div, 1 << calcp);
> } else {
> - calcp = __roundup_pow_of_two(div);
> + calcp = roundup_pow_of_two(div);
> calcp = calcp > 3 ? 3 : calcp;
> }
>
> diff --git a/drivers/infiniband/hw/hfi1/chip.c b/drivers/infiniband/hw/hfi1/chip.c
> index 9b1fb84a3d45..96b1d343c32f 100644
> --- a/drivers/infiniband/hw/hfi1/chip.c
> +++ b/drivers/infiniband/hw/hfi1/chip.c
> @@ -14199,10 +14199,10 @@ static int qos_rmt_entries(struct hfi1_devdata *dd, unsigned int *mp,
> max_by_vl = krcvqs[i];
> if (max_by_vl > 32)
> goto no_qos;
> - m = ilog2(__roundup_pow_of_two(max_by_vl));
> + m = ilog2(roundup_pow_of_two(max_by_vl));
>
> /* determine bits for vl */
> - n = ilog2(__roundup_pow_of_two(num_vls));
> + n = ilog2(roundup_pow_of_two(num_vls));
>
> /* reject if too much is used */
> if ((m + n) > 7)
> diff --git a/drivers/infiniband/hw/hfi1/init.c b/drivers/infiniband/hw/hfi1/init.c
> index 26b792bb1027..838c789c7cce 100644
> --- a/drivers/infiniband/hw/hfi1/init.c
> +++ b/drivers/infiniband/hw/hfi1/init.c
> @@ -467,7 +467,7 @@ int hfi1_create_ctxtdata(struct hfi1_pportdata *ppd, int numa,
> * MTU supported.
> */
> if (rcd->egrbufs.size < hfi1_max_mtu) {
> - rcd->egrbufs.size = __roundup_pow_of_two(hfi1_max_mtu);
> + rcd->egrbufs.size = roundup_pow_of_two(hfi1_max_mtu);
> hfi1_cdbg(PROC,
> "ctxt%u: eager bufs size too small. Adjusting to %u\n",
> rcd->ctxt, rcd->egrbufs.size);
> @@ -1959,7 +1959,7 @@ int hfi1_setup_eagerbufs(struct hfi1_ctxtdata *rcd)
> * to satisfy the "multiple of 8 RcvArray entries" requirement.
> */
> if (rcd->egrbufs.size <= (1 << 20))
> - rcd->egrbufs.rcvtid_size = max((unsigned long)round_mtu,
> + rcd->egrbufs.rcvtid_size = max((unsigned long long)round_mtu,
> rounddown_pow_of_two(rcd->egrbufs.size / 8));
>
> while (alloced_bytes < rcd->egrbufs.size &&
> diff --git a/drivers/infiniband/hw/mlx4/srq.c b/drivers/infiniband/hw/mlx4/srq.c
> index 8dcf6e3d9ae2..7e685600a7b3 100644
> --- a/drivers/infiniband/hw/mlx4/srq.c
> +++ b/drivers/infiniband/hw/mlx4/srq.c
> @@ -96,7 +96,7 @@ int mlx4_ib_create_srq(struct ib_srq *ib_srq,
> srq->msrq.max = roundup_pow_of_two(init_attr->attr.max_wr + 1);
> srq->msrq.max_gs = init_attr->attr.max_sge;
>
> - desc_size = max(32UL,
> + desc_size = max(32ULL,
> roundup_pow_of_two(sizeof (struct mlx4_wqe_srq_next_seg) +
> srq->msrq.max_gs *
> sizeof (struct mlx4_wqe_data_seg)));
> diff --git a/drivers/infiniband/hw/mthca/mthca_srq.c b/drivers/infiniband/hw/mthca/mthca_srq.c
> index a85935ccce88..0c2e14b4142a 100644
> --- a/drivers/infiniband/hw/mthca/mthca_srq.c
> +++ b/drivers/infiniband/hw/mthca/mthca_srq.c
> @@ -225,7 +225,7 @@ int mthca_alloc_srq(struct mthca_dev *dev, struct mthca_pd *pd,
> else
> srq->max = srq->max + 1;
>
> - ds = max(64UL,
> + ds = max(64ULL,
> roundup_pow_of_two(sizeof (struct mthca_next_seg) +
> srq->max_gs * sizeof (struct mthca_data_seg)));
>
> diff --git a/drivers/infiniband/sw/rxe/rxe_qp.c b/drivers/infiniband/sw/rxe/rxe_qp.c
> index e2c6d1cedf41..040b707b0877 100644
> --- a/drivers/infiniband/sw/rxe/rxe_qp.c
> +++ b/drivers/infiniband/sw/rxe/rxe_qp.c
> @@ -592,7 +592,7 @@ int rxe_qp_from_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask,
> int err;
>
> if (mask & IB_QP_MAX_QP_RD_ATOMIC) {
> - int max_rd_atomic = __roundup_pow_of_two(attr->max_rd_atomic);
> + int max_rd_atomic = roundup_pow_of_two(attr->max_rd_atomic);
>
> qp->attr.max_rd_atomic = max_rd_atomic;
> atomic_set(&qp->req.rd_atomic, max_rd_atomic);
> @@ -600,7 +600,7 @@ int rxe_qp_from_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask,
>
> if (mask & IB_QP_MAX_DEST_RD_ATOMIC) {
> int max_dest_rd_atomic =
> - __roundup_pow_of_two(attr->max_dest_rd_atomic);
> + roundup_pow_of_two(attr->max_dest_rd_atomic);
>
> qp->attr.max_dest_rd_atomic = max_dest_rd_atomic;
>
> diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
> index 0c8d81f56a30..ce7c900bd666 100644
> --- a/drivers/iommu/intel-iommu.c
> +++ b/drivers/iommu/intel-iommu.c
> @@ -1488,7 +1488,7 @@ static void iommu_flush_iotlb_psi(struct intel_iommu *iommu,
> unsigned long pfn, unsigned int pages,
> int ih, int map)
> {
> - unsigned int mask = ilog2(__roundup_pow_of_two(pages));
> + unsigned int mask = ilog2(roundup_pow_of_two(pages));
> uint64_t addr = (uint64_t)pfn << VTD_PAGE_SHIFT;
> u16 did = domain->iommu_did[iommu->seq_id];
>
> @@ -3390,7 +3390,7 @@ static unsigned long intel_alloc_iova(struct device *dev,
> /* Restrict dma_mask to the width that the iommu can handle */
> dma_mask = min_t(uint64_t, DOMAIN_MAX_ADDR(domain->gaw), dma_mask);
> /* Ensure we reserve the whole size-aligned region */
> - nrpages = __roundup_pow_of_two(nrpages);
> + nrpages = roundup_pow_of_two(nrpages);
>
> if (!dmar_forcedac && dma_mask > DMA_BIT_MASK(32)) {
> /*
> diff --git a/drivers/iommu/intel-svm.c b/drivers/iommu/intel-svm.c
> index 9b159132405d..602caca3cd1a 100644
> --- a/drivers/iommu/intel-svm.c
> +++ b/drivers/iommu/intel-svm.c
> @@ -115,7 +115,7 @@ static void intel_flush_svm_range_dev (struct intel_svm *svm, struct intel_svm_d
> QI_EIOTLB_TYPE;
> desc.qw1 = 0;
> } else {
> - int mask = ilog2(__roundup_pow_of_two(pages));
> + int mask = ilog2(roundup_pow_of_two(pages));
>
> desc.qw0 = QI_EIOTLB_PASID(svm->pasid) |
> QI_EIOTLB_DID(sdev->did) |
> @@ -142,7 +142,7 @@ static void intel_flush_svm_range_dev (struct intel_svm *svm, struct intel_svm_d
> * for example, an "address" value of 0x12345f000 will
> * flush from 0x123440000 to 0x12347ffff (256KiB). */
> unsigned long last = address + ((unsigned long)(pages - 1) << VTD_PAGE_SHIFT);
> - unsigned long mask = __rounddown_pow_of_two(address ^ last);
> + unsigned long mask = rounddown_pow_of_two(address ^ last);
>
> desc.qw1 = QI_DEV_EIOTLB_ADDR((address & ~mask) |
> (mask - 1)) | QI_DEV_EIOTLB_SIZE;
> diff --git a/drivers/iommu/intel_irq_remapping.c b/drivers/iommu/intel_irq_remapping.c
> index 81e43c1df7ec..935657b2c661 100644
> --- a/drivers/iommu/intel_irq_remapping.c
> +++ b/drivers/iommu/intel_irq_remapping.c
> @@ -113,7 +113,7 @@ static int alloc_irte(struct intel_iommu *iommu,
> return -1;
>
> if (count > 1) {
> - count = __roundup_pow_of_two(count);
> + count = roundup_pow_of_two(count);
> mask = ilog2(count);
> }
>
> diff --git a/drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c b/drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c
> index 6a757dadb5f1..fd5b12c23eaa 100644
> --- a/drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c
> +++ b/drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c
> @@ -680,13 +680,13 @@ static int xgbe_set_ringparam(struct net_device *netdev,
> return -EINVAL;
> }
>
> - rx = __rounddown_pow_of_two(ringparam->rx_pending);
> + rx = rounddown_pow_of_two(ringparam->rx_pending);
> if (rx != ringparam->rx_pending)
> netdev_notice(netdev,
> "rx ring parameter rounded to power of two: %u\n",
> rx);
>
> - tx = __rounddown_pow_of_two(ringparam->tx_pending);
> + tx = rounddown_pow_of_two(ringparam->tx_pending);
> if (tx != ringparam->tx_pending)
> netdev_notice(netdev,
> "tx ring parameter rounded to power of two: %u\n",
> diff --git a/drivers/net/ethernet/marvell/sky2.c b/drivers/net/ethernet/marvell/sky2.c
> index 5f56ee83e3b1..cc3a03b4a611 100644
> --- a/drivers/net/ethernet/marvell/sky2.c
> +++ b/drivers/net/ethernet/marvell/sky2.c
> @@ -4139,7 +4139,7 @@ static int sky2_set_coalesce(struct net_device *dev,
> */
> static unsigned long roundup_ring_size(unsigned long pending)
> {
> - return max(128ul, roundup_pow_of_two(pending+1));
> + return max(128ull, roundup_pow_of_two(pending+1));
> }
>
> static void sky2_get_ringparam(struct net_device *dev,
> diff --git a/drivers/net/ethernet/rocker/rocker_hw.h b/drivers/net/ethernet/rocker/rocker_hw.h
> index 59f1f8b690d2..d8de15509e2c 100644
> --- a/drivers/net/ethernet/rocker/rocker_hw.h
> +++ b/drivers/net/ethernet/rocker/rocker_hw.h
> @@ -88,8 +88,8 @@ enum rocker_dma_type {
> };
>
> /* Rocker DMA ring size limits and default sizes */
> -#define ROCKER_DMA_SIZE_MIN 2ul
> -#define ROCKER_DMA_SIZE_MAX 65536ul
> +#define ROCKER_DMA_SIZE_MIN 2ull
> +#define ROCKER_DMA_SIZE_MAX 65536ull
> #define ROCKER_DMA_CMD_DEFAULT_SIZE 32ul
> #define ROCKER_DMA_EVENT_DEFAULT_SIZE 32ul
> #define ROCKER_DMA_TX_DEFAULT_SIZE 64ul
> diff --git a/drivers/net/ethernet/sfc/ef10.c b/drivers/net/ethernet/sfc/ef10.c
> index 4d9bbccc6f89..4f4d9a5b3b75 100644
> --- a/drivers/net/ethernet/sfc/ef10.c
> +++ b/drivers/net/ethernet/sfc/ef10.c
> @@ -27,7 +27,7 @@ enum {
> };
> /* The maximum size of a shared RSS context */
> /* TODO: this should really be from the mcdi protocol export */
> -#define EFX_EF10_MAX_SHARED_RSS_CONTEXT_SIZE 64UL
> +#define EFX_EF10_MAX_SHARED_RSS_CONTEXT_SIZE 64ULL
>
> /* The filter table(s) are managed by firmware and we have write-only
> * access. When removing filters we must identify them to the
> diff --git a/drivers/net/ethernet/sfc/efx.h b/drivers/net/ethernet/sfc/efx.h
> index 2dd8d5002315..fea2add5860e 100644
> --- a/drivers/net/ethernet/sfc/efx.h
> +++ b/drivers/net/ethernet/sfc/efx.h
> @@ -52,7 +52,7 @@ void efx_schedule_slow_fill(struct efx_rx_queue *rx_queue);
>
> #define EFX_MAX_DMAQ_SIZE 4096UL
> #define EFX_DEFAULT_DMAQ_SIZE 1024UL
> -#define EFX_MIN_DMAQ_SIZE 512UL
> +#define EFX_MIN_DMAQ_SIZE 512ULL
>
> #define EFX_MAX_EVQ_SIZE 16384UL
> #define EFX_MIN_EVQ_SIZE 512UL
> diff --git a/drivers/net/ethernet/sfc/falcon/efx.h b/drivers/net/ethernet/sfc/falcon/efx.h
> index d3b4646545fa..0d16257156d6 100644
> --- a/drivers/net/ethernet/sfc/falcon/efx.h
> +++ b/drivers/net/ethernet/sfc/falcon/efx.h
> @@ -55,7 +55,7 @@ void ef4_schedule_slow_fill(struct ef4_rx_queue *rx_queue);
>
> #define EF4_MAX_DMAQ_SIZE 4096UL
> #define EF4_DEFAULT_DMAQ_SIZE 1024UL
> -#define EF4_MIN_DMAQ_SIZE 512UL
> +#define EF4_MIN_DMAQ_SIZE 512ULL
>
> #define EF4_MAX_EVQ_SIZE 16384UL
> #define EF4_MIN_EVQ_SIZE 512UL
> diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c
> index c7709e49f0e4..f0391e88bc42 100644
> --- a/drivers/pci/msi.c
> +++ b/drivers/pci/msi.c
> @@ -578,7 +578,7 @@ msi_setup_entry(struct pci_dev *dev, int nvec, struct irq_affinity *affd)
> entry->msi_attrib.maskbit = !!(control & PCI_MSI_FLAGS_MASKBIT);
> entry->msi_attrib.default_irq = dev->irq; /* Save IOAPIC IRQ */
> entry->msi_attrib.multi_cap = (control & PCI_MSI_FLAGS_QMASK) >> 1;
> - entry->msi_attrib.multiple = ilog2(__roundup_pow_of_two(nvec));
> + entry->msi_attrib.multiple = ilog2(roundup_pow_of_two(nvec));
>
> if (control & PCI_MSI_FLAGS_64BIT)
> entry->mask_pos = dev->msi_cap + PCI_MSI_MASK_64;
> diff --git a/include/linux/log2.h b/include/linux/log2.h
> index 83a4a3ca3e8a..53a727303dac 100644
> --- a/include/linux/log2.h
> +++ b/include/linux/log2.h
> @@ -47,26 +47,6 @@ bool is_power_of_2(unsigned long n)
> return (n != 0 && ((n & (n - 1)) == 0));
> }
>
> -/**
> - * __roundup_pow_of_two() - round up to nearest power of two
> - * @n: value to round up
> - */
> -static inline __attribute__((const))
> -unsigned long __roundup_pow_of_two(unsigned long n)
> -{
> - return 1UL << fls_long(n - 1);
> -}
> -
> -/**
> - * __rounddown_pow_of_two() - round down to nearest power of two
> - * @n: value to round down
> - */
> -static inline __attribute__((const))
> -unsigned long __rounddown_pow_of_two(unsigned long n)
> -{
> - return 1UL << (fls_long(n) - 1);
> -}
> -
> /**
> * const_ilog2 - log base 2 of 32-bit or a 64-bit constant unsigned value
> * @n: parameter
> @@ -170,14 +150,11 @@ unsigned long __rounddown_pow_of_two(unsigned long n)
> * - the result is undefined when n == 0
> * - this can be used to initialise global variables from constant data
> */
> -#define roundup_pow_of_two(n) \
> -( \
> - __builtin_constant_p(n) ? ( \
> - (n == 1) ? 1 : \
> - (1UL << (ilog2((n) - 1) + 1)) \
> - ) : \
> - __roundup_pow_of_two(n) \
> - )
> +#define roundup_pow_of_two(n) \
> +( \
> + (__builtin_constant_p(n) && ((n) == 1)) ? \
> + 1 : (1ULL << (ilog2((n) - 1) + 1)) \
> +)
>
> /**
> * rounddown_pow_of_two - round the given value down to nearest power of two
> @@ -187,12 +164,11 @@ unsigned long __rounddown_pow_of_two(unsigned long n)
> * - the result is undefined when n == 0
> * - this can be used to initialise global variables from constant data
> */
> -#define rounddown_pow_of_two(n) \
> -( \
> - __builtin_constant_p(n) ? ( \
> - (1UL << ilog2(n))) : \
> - __rounddown_pow_of_two(n) \
> - )
> +#define rounddown_pow_of_two(n) \
> +( \
> + (__builtin_constant_p(n) && ((n) == 1)) ? \
> + 1 : (1ULL << (ilog2(n))) \
> +)
>
> static inline __attribute_const__
> int __order_base_2(unsigned long n)
> diff --git a/kernel/kexec_core.c b/kernel/kexec_core.c
> index 15d70a90b50d..bb9efc6944a4 100644
> --- a/kernel/kexec_core.c
> +++ b/kernel/kexec_core.c
> @@ -1094,7 +1094,8 @@ static int __init crash_notes_memory_init(void)
> * crash_notes is allocated inside one physical page.
> */
> size = sizeof(note_buf_t);
> - align = min(roundup_pow_of_two(sizeof(note_buf_t)), PAGE_SIZE);
> + align = min(roundup_pow_of_two(sizeof(note_buf_t)),
> + (unsigned long long)PAGE_SIZE);
>
> /*
> * Break compile if size is bigger than PAGE_SIZE since crash_notes
> diff --git a/lib/rhashtable.c b/lib/rhashtable.c
> index bdb7e4cadf05..70908678c7a8 100644
> --- a/lib/rhashtable.c
> +++ b/lib/rhashtable.c
> @@ -950,7 +950,7 @@ static size_t rounded_hashtable_size(const struct rhashtable_params *params)
>
> if (params->nelem_hint)
> retsize = max(roundup_pow_of_two(params->nelem_hint * 4 / 3),
> - (unsigned long)params->min_size);
> + (unsigned long long)params->min_size);
> else
> retsize = max(HASH_DEFAULT_SIZE,
> (unsigned long)params->min_size);
> diff --git a/net/sunrpc/xprtrdma/verbs.c b/net/sunrpc/xprtrdma/verbs.c
> index 77c7dd7f05e8..78fb8ccabddd 100644
> --- a/net/sunrpc/xprtrdma/verbs.c
> +++ b/net/sunrpc/xprtrdma/verbs.c
> @@ -1015,7 +1015,7 @@ struct rpcrdma_req *rpcrdma_req_create(struct rpcrdma_xprt *r_xprt, size_t size,
> maxhdrsize = rpcrdma_fixed_maxsz + 3 +
> r_xprt->rx_ia.ri_max_segs * rpcrdma_readchunk_maxsz;
> maxhdrsize *= sizeof(__be32);
> - rb = rpcrdma_regbuf_alloc(__roundup_pow_of_two(maxhdrsize),
> + rb = rpcrdma_regbuf_alloc(roundup_pow_of_two(maxhdrsize),
> DMA_TO_DEVICE, flags);
> if (!rb)
> goto out2;
>
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^ permalink raw reply [flat|nested] 71+ messages in thread
* Re: [PATCH v4 7/8] linux/log2.h: Fix 64bit calculations in roundup/down_pow_two()
2019-12-03 11:47 ` Nicolas Saenz Julienne
(?)
@ 2019-12-05 17:48 ` Robin Murphy
-1 siblings, 0 replies; 71+ messages in thread
From: Robin Murphy @ 2019-12-05 17:48 UTC (permalink / raw)
To: Nicolas Saenz Julienne, andrew.murray, maz, linux-kernel,
Michael Turquette, Stephen Boyd, Emilio López,
Maxime Ripard, Chen-Yu Tsai, Mike Marciniszyn,
Dennis Dalessandro, Yishai Hadas, Moni Shoua, David Woodhouse,
Lu Baolu, Joerg Roedel, Tom Lendacky, Mirko Lindner,
Stephen Hemminger, Jiri Pirko, Solarflare linux maintainers,
Edward Cree, Martin Habets, Bjorn Helgaas, Eric Biederman,
Thomas Graf, Herbert Xu
Cc: james.quinlan, mbrugger, f.fainelli, phil, wahrenst,
jeremy.linton, linux-pci, linux-rpi-kernel, Robin Murphy,
Doug Ledford, Jason Gunthorpe, David S. Miller, Trond Myklebust,
Anna Schumaker, J. Bruce Fields, Chuck Lever, linux-clk,
linux-arm-kernel, linux-rdma, iommu, netdev, kexec, linux-nfs
On 03/12/2019 11:47 am, Nicolas Saenz Julienne wrote:
> Some users need to make sure their rounding function accepts and returns
> 64bit long variables regardless of the architecture. Sadly
> roundup/rounddown_pow_two() takes and returns unsigned longs. It turns
> out ilog2() already handles 32/64bit calculations properly, and being
> the building block to the round functions we can rework them as a
> wrapper around it.
Neat! Although all the additional ULL casts this introduces seem
somewhat unwelcome - I suppose the (1ULL << (ilog2(n))) makes it
effectively always return unsigned long long now. Might it make sense to
cast the return value to typeof(n) to avoid this slightly non-obvious
behaviour (and the associated churn)?
Robin.
> Suggested-by: Robin Murphy <robin.murphy@arm.con>
> Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
> ---
> drivers/clk/clk-divider.c | 8 ++--
> drivers/clk/sunxi/clk-sunxi.c | 2 +-
> drivers/infiniband/hw/hfi1/chip.c | 4 +-
> drivers/infiniband/hw/hfi1/init.c | 4 +-
> drivers/infiniband/hw/mlx4/srq.c | 2 +-
> drivers/infiniband/hw/mthca/mthca_srq.c | 2 +-
> drivers/infiniband/sw/rxe/rxe_qp.c | 4 +-
> drivers/iommu/intel-iommu.c | 4 +-
> drivers/iommu/intel-svm.c | 4 +-
> drivers/iommu/intel_irq_remapping.c | 2 +-
> drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c | 4 +-
> drivers/net/ethernet/marvell/sky2.c | 2 +-
> drivers/net/ethernet/rocker/rocker_hw.h | 4 +-
> drivers/net/ethernet/sfc/ef10.c | 2 +-
> drivers/net/ethernet/sfc/efx.h | 2 +-
> drivers/net/ethernet/sfc/falcon/efx.h | 2 +-
> drivers/pci/msi.c | 2 +-
> include/linux/log2.h | 44 +++++---------------
> kernel/kexec_core.c | 3 +-
> lib/rhashtable.c | 2 +-
> net/sunrpc/xprtrdma/verbs.c | 2 +-
> 21 files changed, 41 insertions(+), 64 deletions(-)
>
> diff --git a/drivers/clk/clk-divider.c b/drivers/clk/clk-divider.c
> index 098b2b01f0af..ba947e4c8193 100644
> --- a/drivers/clk/clk-divider.c
> +++ b/drivers/clk/clk-divider.c
> @@ -222,7 +222,7 @@ static int _div_round_up(const struct clk_div_table *table,
> int div = DIV_ROUND_UP_ULL((u64)parent_rate, rate);
>
> if (flags & CLK_DIVIDER_POWER_OF_TWO)
> - div = __roundup_pow_of_two(div);
> + div = roundup_pow_of_two(div);
> if (table)
> div = _round_up_table(table, div);
>
> @@ -240,8 +240,8 @@ static int _div_round_closest(const struct clk_div_table *table,
> down = parent_rate / rate;
>
> if (flags & CLK_DIVIDER_POWER_OF_TWO) {
> - up = __roundup_pow_of_two(up);
> - down = __rounddown_pow_of_two(down);
> + up = roundup_pow_of_two(up);
> + down = rounddown_pow_of_two(down);
> } else if (table) {
> up = _round_up_table(table, up);
> down = _round_down_table(table, down);
> @@ -278,7 +278,7 @@ static int _next_div(const struct clk_div_table *table, int div,
> div++;
>
> if (flags & CLK_DIVIDER_POWER_OF_TWO)
> - return __roundup_pow_of_two(div);
> + return roundup_pow_of_two(div);
> if (table)
> return _round_up_table(table, div);
>
> diff --git a/drivers/clk/sunxi/clk-sunxi.c b/drivers/clk/sunxi/clk-sunxi.c
> index 27201fd26e44..faec99dc09c0 100644
> --- a/drivers/clk/sunxi/clk-sunxi.c
> +++ b/drivers/clk/sunxi/clk-sunxi.c
> @@ -311,7 +311,7 @@ static void sun6i_get_ahb1_factors(struct factors_request *req)
>
> calcm = DIV_ROUND_UP(div, 1 << calcp);
> } else {
> - calcp = __roundup_pow_of_two(div);
> + calcp = roundup_pow_of_two(div);
> calcp = calcp > 3 ? 3 : calcp;
> }
>
> diff --git a/drivers/infiniband/hw/hfi1/chip.c b/drivers/infiniband/hw/hfi1/chip.c
> index 9b1fb84a3d45..96b1d343c32f 100644
> --- a/drivers/infiniband/hw/hfi1/chip.c
> +++ b/drivers/infiniband/hw/hfi1/chip.c
> @@ -14199,10 +14199,10 @@ static int qos_rmt_entries(struct hfi1_devdata *dd, unsigned int *mp,
> max_by_vl = krcvqs[i];
> if (max_by_vl > 32)
> goto no_qos;
> - m = ilog2(__roundup_pow_of_two(max_by_vl));
> + m = ilog2(roundup_pow_of_two(max_by_vl));
>
> /* determine bits for vl */
> - n = ilog2(__roundup_pow_of_two(num_vls));
> + n = ilog2(roundup_pow_of_two(num_vls));
>
> /* reject if too much is used */
> if ((m + n) > 7)
> diff --git a/drivers/infiniband/hw/hfi1/init.c b/drivers/infiniband/hw/hfi1/init.c
> index 26b792bb1027..838c789c7cce 100644
> --- a/drivers/infiniband/hw/hfi1/init.c
> +++ b/drivers/infiniband/hw/hfi1/init.c
> @@ -467,7 +467,7 @@ int hfi1_create_ctxtdata(struct hfi1_pportdata *ppd, int numa,
> * MTU supported.
> */
> if (rcd->egrbufs.size < hfi1_max_mtu) {
> - rcd->egrbufs.size = __roundup_pow_of_two(hfi1_max_mtu);
> + rcd->egrbufs.size = roundup_pow_of_two(hfi1_max_mtu);
> hfi1_cdbg(PROC,
> "ctxt%u: eager bufs size too small. Adjusting to %u\n",
> rcd->ctxt, rcd->egrbufs.size);
> @@ -1959,7 +1959,7 @@ int hfi1_setup_eagerbufs(struct hfi1_ctxtdata *rcd)
> * to satisfy the "multiple of 8 RcvArray entries" requirement.
> */
> if (rcd->egrbufs.size <= (1 << 20))
> - rcd->egrbufs.rcvtid_size = max((unsigned long)round_mtu,
> + rcd->egrbufs.rcvtid_size = max((unsigned long long)round_mtu,
> rounddown_pow_of_two(rcd->egrbufs.size / 8));
>
> while (alloced_bytes < rcd->egrbufs.size &&
> diff --git a/drivers/infiniband/hw/mlx4/srq.c b/drivers/infiniband/hw/mlx4/srq.c
> index 8dcf6e3d9ae2..7e685600a7b3 100644
> --- a/drivers/infiniband/hw/mlx4/srq.c
> +++ b/drivers/infiniband/hw/mlx4/srq.c
> @@ -96,7 +96,7 @@ int mlx4_ib_create_srq(struct ib_srq *ib_srq,
> srq->msrq.max = roundup_pow_of_two(init_attr->attr.max_wr + 1);
> srq->msrq.max_gs = init_attr->attr.max_sge;
>
> - desc_size = max(32UL,
> + desc_size = max(32ULL,
> roundup_pow_of_two(sizeof (struct mlx4_wqe_srq_next_seg) +
> srq->msrq.max_gs *
> sizeof (struct mlx4_wqe_data_seg)));
> diff --git a/drivers/infiniband/hw/mthca/mthca_srq.c b/drivers/infiniband/hw/mthca/mthca_srq.c
> index a85935ccce88..0c2e14b4142a 100644
> --- a/drivers/infiniband/hw/mthca/mthca_srq.c
> +++ b/drivers/infiniband/hw/mthca/mthca_srq.c
> @@ -225,7 +225,7 @@ int mthca_alloc_srq(struct mthca_dev *dev, struct mthca_pd *pd,
> else
> srq->max = srq->max + 1;
>
> - ds = max(64UL,
> + ds = max(64ULL,
> roundup_pow_of_two(sizeof (struct mthca_next_seg) +
> srq->max_gs * sizeof (struct mthca_data_seg)));
>
> diff --git a/drivers/infiniband/sw/rxe/rxe_qp.c b/drivers/infiniband/sw/rxe/rxe_qp.c
> index e2c6d1cedf41..040b707b0877 100644
> --- a/drivers/infiniband/sw/rxe/rxe_qp.c
> +++ b/drivers/infiniband/sw/rxe/rxe_qp.c
> @@ -592,7 +592,7 @@ int rxe_qp_from_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask,
> int err;
>
> if (mask & IB_QP_MAX_QP_RD_ATOMIC) {
> - int max_rd_atomic = __roundup_pow_of_two(attr->max_rd_atomic);
> + int max_rd_atomic = roundup_pow_of_two(attr->max_rd_atomic);
>
> qp->attr.max_rd_atomic = max_rd_atomic;
> atomic_set(&qp->req.rd_atomic, max_rd_atomic);
> @@ -600,7 +600,7 @@ int rxe_qp_from_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask,
>
> if (mask & IB_QP_MAX_DEST_RD_ATOMIC) {
> int max_dest_rd_atomic =
> - __roundup_pow_of_two(attr->max_dest_rd_atomic);
> + roundup_pow_of_two(attr->max_dest_rd_atomic);
>
> qp->attr.max_dest_rd_atomic = max_dest_rd_atomic;
>
> diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
> index 0c8d81f56a30..ce7c900bd666 100644
> --- a/drivers/iommu/intel-iommu.c
> +++ b/drivers/iommu/intel-iommu.c
> @@ -1488,7 +1488,7 @@ static void iommu_flush_iotlb_psi(struct intel_iommu *iommu,
> unsigned long pfn, unsigned int pages,
> int ih, int map)
> {
> - unsigned int mask = ilog2(__roundup_pow_of_two(pages));
> + unsigned int mask = ilog2(roundup_pow_of_two(pages));
> uint64_t addr = (uint64_t)pfn << VTD_PAGE_SHIFT;
> u16 did = domain->iommu_did[iommu->seq_id];
>
> @@ -3390,7 +3390,7 @@ static unsigned long intel_alloc_iova(struct device *dev,
> /* Restrict dma_mask to the width that the iommu can handle */
> dma_mask = min_t(uint64_t, DOMAIN_MAX_ADDR(domain->gaw), dma_mask);
> /* Ensure we reserve the whole size-aligned region */
> - nrpages = __roundup_pow_of_two(nrpages);
> + nrpages = roundup_pow_of_two(nrpages);
>
> if (!dmar_forcedac && dma_mask > DMA_BIT_MASK(32)) {
> /*
> diff --git a/drivers/iommu/intel-svm.c b/drivers/iommu/intel-svm.c
> index 9b159132405d..602caca3cd1a 100644
> --- a/drivers/iommu/intel-svm.c
> +++ b/drivers/iommu/intel-svm.c
> @@ -115,7 +115,7 @@ static void intel_flush_svm_range_dev (struct intel_svm *svm, struct intel_svm_d
> QI_EIOTLB_TYPE;
> desc.qw1 = 0;
> } else {
> - int mask = ilog2(__roundup_pow_of_two(pages));
> + int mask = ilog2(roundup_pow_of_two(pages));
>
> desc.qw0 = QI_EIOTLB_PASID(svm->pasid) |
> QI_EIOTLB_DID(sdev->did) |
> @@ -142,7 +142,7 @@ static void intel_flush_svm_range_dev (struct intel_svm *svm, struct intel_svm_d
> * for example, an "address" value of 0x12345f000 will
> * flush from 0x123440000 to 0x12347ffff (256KiB). */
> unsigned long last = address + ((unsigned long)(pages - 1) << VTD_PAGE_SHIFT);
> - unsigned long mask = __rounddown_pow_of_two(address ^ last);
> + unsigned long mask = rounddown_pow_of_two(address ^ last);
>
> desc.qw1 = QI_DEV_EIOTLB_ADDR((address & ~mask) |
> (mask - 1)) | QI_DEV_EIOTLB_SIZE;
> diff --git a/drivers/iommu/intel_irq_remapping.c b/drivers/iommu/intel_irq_remapping.c
> index 81e43c1df7ec..935657b2c661 100644
> --- a/drivers/iommu/intel_irq_remapping.c
> +++ b/drivers/iommu/intel_irq_remapping.c
> @@ -113,7 +113,7 @@ static int alloc_irte(struct intel_iommu *iommu,
> return -1;
>
> if (count > 1) {
> - count = __roundup_pow_of_two(count);
> + count = roundup_pow_of_two(count);
> mask = ilog2(count);
> }
>
> diff --git a/drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c b/drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c
> index 6a757dadb5f1..fd5b12c23eaa 100644
> --- a/drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c
> +++ b/drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c
> @@ -680,13 +680,13 @@ static int xgbe_set_ringparam(struct net_device *netdev,
> return -EINVAL;
> }
>
> - rx = __rounddown_pow_of_two(ringparam->rx_pending);
> + rx = rounddown_pow_of_two(ringparam->rx_pending);
> if (rx != ringparam->rx_pending)
> netdev_notice(netdev,
> "rx ring parameter rounded to power of two: %u\n",
> rx);
>
> - tx = __rounddown_pow_of_two(ringparam->tx_pending);
> + tx = rounddown_pow_of_two(ringparam->tx_pending);
> if (tx != ringparam->tx_pending)
> netdev_notice(netdev,
> "tx ring parameter rounded to power of two: %u\n",
> diff --git a/drivers/net/ethernet/marvell/sky2.c b/drivers/net/ethernet/marvell/sky2.c
> index 5f56ee83e3b1..cc3a03b4a611 100644
> --- a/drivers/net/ethernet/marvell/sky2.c
> +++ b/drivers/net/ethernet/marvell/sky2.c
> @@ -4139,7 +4139,7 @@ static int sky2_set_coalesce(struct net_device *dev,
> */
> static unsigned long roundup_ring_size(unsigned long pending)
> {
> - return max(128ul, roundup_pow_of_two(pending+1));
> + return max(128ull, roundup_pow_of_two(pending+1));
> }
>
> static void sky2_get_ringparam(struct net_device *dev,
> diff --git a/drivers/net/ethernet/rocker/rocker_hw.h b/drivers/net/ethernet/rocker/rocker_hw.h
> index 59f1f8b690d2..d8de15509e2c 100644
> --- a/drivers/net/ethernet/rocker/rocker_hw.h
> +++ b/drivers/net/ethernet/rocker/rocker_hw.h
> @@ -88,8 +88,8 @@ enum rocker_dma_type {
> };
>
> /* Rocker DMA ring size limits and default sizes */
> -#define ROCKER_DMA_SIZE_MIN 2ul
> -#define ROCKER_DMA_SIZE_MAX 65536ul
> +#define ROCKER_DMA_SIZE_MIN 2ull
> +#define ROCKER_DMA_SIZE_MAX 65536ull
> #define ROCKER_DMA_CMD_DEFAULT_SIZE 32ul
> #define ROCKER_DMA_EVENT_DEFAULT_SIZE 32ul
> #define ROCKER_DMA_TX_DEFAULT_SIZE 64ul
> diff --git a/drivers/net/ethernet/sfc/ef10.c b/drivers/net/ethernet/sfc/ef10.c
> index 4d9bbccc6f89..4f4d9a5b3b75 100644
> --- a/drivers/net/ethernet/sfc/ef10.c
> +++ b/drivers/net/ethernet/sfc/ef10.c
> @@ -27,7 +27,7 @@ enum {
> };
> /* The maximum size of a shared RSS context */
> /* TODO: this should really be from the mcdi protocol export */
> -#define EFX_EF10_MAX_SHARED_RSS_CONTEXT_SIZE 64UL
> +#define EFX_EF10_MAX_SHARED_RSS_CONTEXT_SIZE 64ULL
>
> /* The filter table(s) are managed by firmware and we have write-only
> * access. When removing filters we must identify them to the
> diff --git a/drivers/net/ethernet/sfc/efx.h b/drivers/net/ethernet/sfc/efx.h
> index 2dd8d5002315..fea2add5860e 100644
> --- a/drivers/net/ethernet/sfc/efx.h
> +++ b/drivers/net/ethernet/sfc/efx.h
> @@ -52,7 +52,7 @@ void efx_schedule_slow_fill(struct efx_rx_queue *rx_queue);
>
> #define EFX_MAX_DMAQ_SIZE 4096UL
> #define EFX_DEFAULT_DMAQ_SIZE 1024UL
> -#define EFX_MIN_DMAQ_SIZE 512UL
> +#define EFX_MIN_DMAQ_SIZE 512ULL
>
> #define EFX_MAX_EVQ_SIZE 16384UL
> #define EFX_MIN_EVQ_SIZE 512UL
> diff --git a/drivers/net/ethernet/sfc/falcon/efx.h b/drivers/net/ethernet/sfc/falcon/efx.h
> index d3b4646545fa..0d16257156d6 100644
> --- a/drivers/net/ethernet/sfc/falcon/efx.h
> +++ b/drivers/net/ethernet/sfc/falcon/efx.h
> @@ -55,7 +55,7 @@ void ef4_schedule_slow_fill(struct ef4_rx_queue *rx_queue);
>
> #define EF4_MAX_DMAQ_SIZE 4096UL
> #define EF4_DEFAULT_DMAQ_SIZE 1024UL
> -#define EF4_MIN_DMAQ_SIZE 512UL
> +#define EF4_MIN_DMAQ_SIZE 512ULL
>
> #define EF4_MAX_EVQ_SIZE 16384UL
> #define EF4_MIN_EVQ_SIZE 512UL
> diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c
> index c7709e49f0e4..f0391e88bc42 100644
> --- a/drivers/pci/msi.c
> +++ b/drivers/pci/msi.c
> @@ -578,7 +578,7 @@ msi_setup_entry(struct pci_dev *dev, int nvec, struct irq_affinity *affd)
> entry->msi_attrib.maskbit = !!(control & PCI_MSI_FLAGS_MASKBIT);
> entry->msi_attrib.default_irq = dev->irq; /* Save IOAPIC IRQ */
> entry->msi_attrib.multi_cap = (control & PCI_MSI_FLAGS_QMASK) >> 1;
> - entry->msi_attrib.multiple = ilog2(__roundup_pow_of_two(nvec));
> + entry->msi_attrib.multiple = ilog2(roundup_pow_of_two(nvec));
>
> if (control & PCI_MSI_FLAGS_64BIT)
> entry->mask_pos = dev->msi_cap + PCI_MSI_MASK_64;
> diff --git a/include/linux/log2.h b/include/linux/log2.h
> index 83a4a3ca3e8a..53a727303dac 100644
> --- a/include/linux/log2.h
> +++ b/include/linux/log2.h
> @@ -47,26 +47,6 @@ bool is_power_of_2(unsigned long n)
> return (n != 0 && ((n & (n - 1)) == 0));
> }
>
> -/**
> - * __roundup_pow_of_two() - round up to nearest power of two
> - * @n: value to round up
> - */
> -static inline __attribute__((const))
> -unsigned long __roundup_pow_of_two(unsigned long n)
> -{
> - return 1UL << fls_long(n - 1);
> -}
> -
> -/**
> - * __rounddown_pow_of_two() - round down to nearest power of two
> - * @n: value to round down
> - */
> -static inline __attribute__((const))
> -unsigned long __rounddown_pow_of_two(unsigned long n)
> -{
> - return 1UL << (fls_long(n) - 1);
> -}
> -
> /**
> * const_ilog2 - log base 2 of 32-bit or a 64-bit constant unsigned value
> * @n: parameter
> @@ -170,14 +150,11 @@ unsigned long __rounddown_pow_of_two(unsigned long n)
> * - the result is undefined when n == 0
> * - this can be used to initialise global variables from constant data
> */
> -#define roundup_pow_of_two(n) \
> -( \
> - __builtin_constant_p(n) ? ( \
> - (n == 1) ? 1 : \
> - (1UL << (ilog2((n) - 1) + 1)) \
> - ) : \
> - __roundup_pow_of_two(n) \
> - )
> +#define roundup_pow_of_two(n) \
> +( \
> + (__builtin_constant_p(n) && ((n) == 1)) ? \
> + 1 : (1ULL << (ilog2((n) - 1) + 1)) \
> +)
>
> /**
> * rounddown_pow_of_two - round the given value down to nearest power of two
> @@ -187,12 +164,11 @@ unsigned long __rounddown_pow_of_two(unsigned long n)
> * - the result is undefined when n == 0
> * - this can be used to initialise global variables from constant data
> */
> -#define rounddown_pow_of_two(n) \
> -( \
> - __builtin_constant_p(n) ? ( \
> - (1UL << ilog2(n))) : \
> - __rounddown_pow_of_two(n) \
> - )
> +#define rounddown_pow_of_two(n) \
> +( \
> + (__builtin_constant_p(n) && ((n) == 1)) ? \
> + 1 : (1ULL << (ilog2(n))) \
> +)
>
> static inline __attribute_const__
> int __order_base_2(unsigned long n)
> diff --git a/kernel/kexec_core.c b/kernel/kexec_core.c
> index 15d70a90b50d..bb9efc6944a4 100644
> --- a/kernel/kexec_core.c
> +++ b/kernel/kexec_core.c
> @@ -1094,7 +1094,8 @@ static int __init crash_notes_memory_init(void)
> * crash_notes is allocated inside one physical page.
> */
> size = sizeof(note_buf_t);
> - align = min(roundup_pow_of_two(sizeof(note_buf_t)), PAGE_SIZE);
> + align = min(roundup_pow_of_two(sizeof(note_buf_t)),
> + (unsigned long long)PAGE_SIZE);
>
> /*
> * Break compile if size is bigger than PAGE_SIZE since crash_notes
> diff --git a/lib/rhashtable.c b/lib/rhashtable.c
> index bdb7e4cadf05..70908678c7a8 100644
> --- a/lib/rhashtable.c
> +++ b/lib/rhashtable.c
> @@ -950,7 +950,7 @@ static size_t rounded_hashtable_size(const struct rhashtable_params *params)
>
> if (params->nelem_hint)
> retsize = max(roundup_pow_of_two(params->nelem_hint * 4 / 3),
> - (unsigned long)params->min_size);
> + (unsigned long long)params->min_size);
> else
> retsize = max(HASH_DEFAULT_SIZE,
> (unsigned long)params->min_size);
> diff --git a/net/sunrpc/xprtrdma/verbs.c b/net/sunrpc/xprtrdma/verbs.c
> index 77c7dd7f05e8..78fb8ccabddd 100644
> --- a/net/sunrpc/xprtrdma/verbs.c
> +++ b/net/sunrpc/xprtrdma/verbs.c
> @@ -1015,7 +1015,7 @@ struct rpcrdma_req *rpcrdma_req_create(struct rpcrdma_xprt *r_xprt, size_t size,
> maxhdrsize = rpcrdma_fixed_maxsz + 3 +
> r_xprt->rx_ia.ri_max_segs * rpcrdma_readchunk_maxsz;
> maxhdrsize *= sizeof(__be32);
> - rb = rpcrdma_regbuf_alloc(__roundup_pow_of_two(maxhdrsize),
> + rb = rpcrdma_regbuf_alloc(roundup_pow_of_two(maxhdrsize),
> DMA_TO_DEVICE, flags);
> if (!rb)
> goto out2;
>
^ permalink raw reply [flat|nested] 71+ messages in thread
* Re: [PATCH v4 7/8] linux/log2.h: Fix 64bit calculations in roundup/down_pow_two()
@ 2019-12-05 17:48 ` Robin Murphy
0 siblings, 0 replies; 71+ messages in thread
From: Robin Murphy @ 2019-12-05 17:48 UTC (permalink / raw)
To: Nicolas Saenz Julienne, andrew.murray, maz, linux-kernel,
Michael Turquette, Stephen Boyd, Emilio López,
Maxime Ripard, Chen-Yu Tsai, Mike Marciniszyn,
Dennis Dalessandro, Yishai Hadas, Moni Shoua, David Woodhouse,
Lu Baolu, Joerg Roedel, Tom Lendacky, Mirko Lindner,
Stephen Hemminger, Jiri Pirko, Solarflare linux maintainers,
Edward Cree, Martin Habets, Bjorn Helgaas, Eric Biederman,
Thomas Graf, Herbert Xu
Cc: linux-pci, J. Bruce Fields, linux-clk, f.fainelli, linux-rdma,
phil, Jason Gunthorpe, Doug Ledford, linux-rpi-kernel,
Trond Myklebust, linux-arm-kernel, linux-nfs, mbrugger, netdev,
kexec, jeremy.linton, David S. Miller, iommu, Chuck Lever,
wahrenst, james.quinlan, Anna Schumaker, Robin Murphy
On 03/12/2019 11:47 am, Nicolas Saenz Julienne wrote:
> Some users need to make sure their rounding function accepts and returns
> 64bit long variables regardless of the architecture. Sadly
> roundup/rounddown_pow_two() takes and returns unsigned longs. It turns
> out ilog2() already handles 32/64bit calculations properly, and being
> the building block to the round functions we can rework them as a
> wrapper around it.
Neat! Although all the additional ULL casts this introduces seem
somewhat unwelcome - I suppose the (1ULL << (ilog2(n))) makes it
effectively always return unsigned long long now. Might it make sense to
cast the return value to typeof(n) to avoid this slightly non-obvious
behaviour (and the associated churn)?
Robin.
> Suggested-by: Robin Murphy <robin.murphy@arm.con>
> Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
> ---
> drivers/clk/clk-divider.c | 8 ++--
> drivers/clk/sunxi/clk-sunxi.c | 2 +-
> drivers/infiniband/hw/hfi1/chip.c | 4 +-
> drivers/infiniband/hw/hfi1/init.c | 4 +-
> drivers/infiniband/hw/mlx4/srq.c | 2 +-
> drivers/infiniband/hw/mthca/mthca_srq.c | 2 +-
> drivers/infiniband/sw/rxe/rxe_qp.c | 4 +-
> drivers/iommu/intel-iommu.c | 4 +-
> drivers/iommu/intel-svm.c | 4 +-
> drivers/iommu/intel_irq_remapping.c | 2 +-
> drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c | 4 +-
> drivers/net/ethernet/marvell/sky2.c | 2 +-
> drivers/net/ethernet/rocker/rocker_hw.h | 4 +-
> drivers/net/ethernet/sfc/ef10.c | 2 +-
> drivers/net/ethernet/sfc/efx.h | 2 +-
> drivers/net/ethernet/sfc/falcon/efx.h | 2 +-
> drivers/pci/msi.c | 2 +-
> include/linux/log2.h | 44 +++++---------------
> kernel/kexec_core.c | 3 +-
> lib/rhashtable.c | 2 +-
> net/sunrpc/xprtrdma/verbs.c | 2 +-
> 21 files changed, 41 insertions(+), 64 deletions(-)
>
> diff --git a/drivers/clk/clk-divider.c b/drivers/clk/clk-divider.c
> index 098b2b01f0af..ba947e4c8193 100644
> --- a/drivers/clk/clk-divider.c
> +++ b/drivers/clk/clk-divider.c
> @@ -222,7 +222,7 @@ static int _div_round_up(const struct clk_div_table *table,
> int div = DIV_ROUND_UP_ULL((u64)parent_rate, rate);
>
> if (flags & CLK_DIVIDER_POWER_OF_TWO)
> - div = __roundup_pow_of_two(div);
> + div = roundup_pow_of_two(div);
> if (table)
> div = _round_up_table(table, div);
>
> @@ -240,8 +240,8 @@ static int _div_round_closest(const struct clk_div_table *table,
> down = parent_rate / rate;
>
> if (flags & CLK_DIVIDER_POWER_OF_TWO) {
> - up = __roundup_pow_of_two(up);
> - down = __rounddown_pow_of_two(down);
> + up = roundup_pow_of_two(up);
> + down = rounddown_pow_of_two(down);
> } else if (table) {
> up = _round_up_table(table, up);
> down = _round_down_table(table, down);
> @@ -278,7 +278,7 @@ static int _next_div(const struct clk_div_table *table, int div,
> div++;
>
> if (flags & CLK_DIVIDER_POWER_OF_TWO)
> - return __roundup_pow_of_two(div);
> + return roundup_pow_of_two(div);
> if (table)
> return _round_up_table(table, div);
>
> diff --git a/drivers/clk/sunxi/clk-sunxi.c b/drivers/clk/sunxi/clk-sunxi.c
> index 27201fd26e44..faec99dc09c0 100644
> --- a/drivers/clk/sunxi/clk-sunxi.c
> +++ b/drivers/clk/sunxi/clk-sunxi.c
> @@ -311,7 +311,7 @@ static void sun6i_get_ahb1_factors(struct factors_request *req)
>
> calcm = DIV_ROUND_UP(div, 1 << calcp);
> } else {
> - calcp = __roundup_pow_of_two(div);
> + calcp = roundup_pow_of_two(div);
> calcp = calcp > 3 ? 3 : calcp;
> }
>
> diff --git a/drivers/infiniband/hw/hfi1/chip.c b/drivers/infiniband/hw/hfi1/chip.c
> index 9b1fb84a3d45..96b1d343c32f 100644
> --- a/drivers/infiniband/hw/hfi1/chip.c
> +++ b/drivers/infiniband/hw/hfi1/chip.c
> @@ -14199,10 +14199,10 @@ static int qos_rmt_entries(struct hfi1_devdata *dd, unsigned int *mp,
> max_by_vl = krcvqs[i];
> if (max_by_vl > 32)
> goto no_qos;
> - m = ilog2(__roundup_pow_of_two(max_by_vl));
> + m = ilog2(roundup_pow_of_two(max_by_vl));
>
> /* determine bits for vl */
> - n = ilog2(__roundup_pow_of_two(num_vls));
> + n = ilog2(roundup_pow_of_two(num_vls));
>
> /* reject if too much is used */
> if ((m + n) > 7)
> diff --git a/drivers/infiniband/hw/hfi1/init.c b/drivers/infiniband/hw/hfi1/init.c
> index 26b792bb1027..838c789c7cce 100644
> --- a/drivers/infiniband/hw/hfi1/init.c
> +++ b/drivers/infiniband/hw/hfi1/init.c
> @@ -467,7 +467,7 @@ int hfi1_create_ctxtdata(struct hfi1_pportdata *ppd, int numa,
> * MTU supported.
> */
> if (rcd->egrbufs.size < hfi1_max_mtu) {
> - rcd->egrbufs.size = __roundup_pow_of_two(hfi1_max_mtu);
> + rcd->egrbufs.size = roundup_pow_of_two(hfi1_max_mtu);
> hfi1_cdbg(PROC,
> "ctxt%u: eager bufs size too small. Adjusting to %u\n",
> rcd->ctxt, rcd->egrbufs.size);
> @@ -1959,7 +1959,7 @@ int hfi1_setup_eagerbufs(struct hfi1_ctxtdata *rcd)
> * to satisfy the "multiple of 8 RcvArray entries" requirement.
> */
> if (rcd->egrbufs.size <= (1 << 20))
> - rcd->egrbufs.rcvtid_size = max((unsigned long)round_mtu,
> + rcd->egrbufs.rcvtid_size = max((unsigned long long)round_mtu,
> rounddown_pow_of_two(rcd->egrbufs.size / 8));
>
> while (alloced_bytes < rcd->egrbufs.size &&
> diff --git a/drivers/infiniband/hw/mlx4/srq.c b/drivers/infiniband/hw/mlx4/srq.c
> index 8dcf6e3d9ae2..7e685600a7b3 100644
> --- a/drivers/infiniband/hw/mlx4/srq.c
> +++ b/drivers/infiniband/hw/mlx4/srq.c
> @@ -96,7 +96,7 @@ int mlx4_ib_create_srq(struct ib_srq *ib_srq,
> srq->msrq.max = roundup_pow_of_two(init_attr->attr.max_wr + 1);
> srq->msrq.max_gs = init_attr->attr.max_sge;
>
> - desc_size = max(32UL,
> + desc_size = max(32ULL,
> roundup_pow_of_two(sizeof (struct mlx4_wqe_srq_next_seg) +
> srq->msrq.max_gs *
> sizeof (struct mlx4_wqe_data_seg)));
> diff --git a/drivers/infiniband/hw/mthca/mthca_srq.c b/drivers/infiniband/hw/mthca/mthca_srq.c
> index a85935ccce88..0c2e14b4142a 100644
> --- a/drivers/infiniband/hw/mthca/mthca_srq.c
> +++ b/drivers/infiniband/hw/mthca/mthca_srq.c
> @@ -225,7 +225,7 @@ int mthca_alloc_srq(struct mthca_dev *dev, struct mthca_pd *pd,
> else
> srq->max = srq->max + 1;
>
> - ds = max(64UL,
> + ds = max(64ULL,
> roundup_pow_of_two(sizeof (struct mthca_next_seg) +
> srq->max_gs * sizeof (struct mthca_data_seg)));
>
> diff --git a/drivers/infiniband/sw/rxe/rxe_qp.c b/drivers/infiniband/sw/rxe/rxe_qp.c
> index e2c6d1cedf41..040b707b0877 100644
> --- a/drivers/infiniband/sw/rxe/rxe_qp.c
> +++ b/drivers/infiniband/sw/rxe/rxe_qp.c
> @@ -592,7 +592,7 @@ int rxe_qp_from_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask,
> int err;
>
> if (mask & IB_QP_MAX_QP_RD_ATOMIC) {
> - int max_rd_atomic = __roundup_pow_of_two(attr->max_rd_atomic);
> + int max_rd_atomic = roundup_pow_of_two(attr->max_rd_atomic);
>
> qp->attr.max_rd_atomic = max_rd_atomic;
> atomic_set(&qp->req.rd_atomic, max_rd_atomic);
> @@ -600,7 +600,7 @@ int rxe_qp_from_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask,
>
> if (mask & IB_QP_MAX_DEST_RD_ATOMIC) {
> int max_dest_rd_atomic =
> - __roundup_pow_of_two(attr->max_dest_rd_atomic);
> + roundup_pow_of_two(attr->max_dest_rd_atomic);
>
> qp->attr.max_dest_rd_atomic = max_dest_rd_atomic;
>
> diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
> index 0c8d81f56a30..ce7c900bd666 100644
> --- a/drivers/iommu/intel-iommu.c
> +++ b/drivers/iommu/intel-iommu.c
> @@ -1488,7 +1488,7 @@ static void iommu_flush_iotlb_psi(struct intel_iommu *iommu,
> unsigned long pfn, unsigned int pages,
> int ih, int map)
> {
> - unsigned int mask = ilog2(__roundup_pow_of_two(pages));
> + unsigned int mask = ilog2(roundup_pow_of_two(pages));
> uint64_t addr = (uint64_t)pfn << VTD_PAGE_SHIFT;
> u16 did = domain->iommu_did[iommu->seq_id];
>
> @@ -3390,7 +3390,7 @@ static unsigned long intel_alloc_iova(struct device *dev,
> /* Restrict dma_mask to the width that the iommu can handle */
> dma_mask = min_t(uint64_t, DOMAIN_MAX_ADDR(domain->gaw), dma_mask);
> /* Ensure we reserve the whole size-aligned region */
> - nrpages = __roundup_pow_of_two(nrpages);
> + nrpages = roundup_pow_of_two(nrpages);
>
> if (!dmar_forcedac && dma_mask > DMA_BIT_MASK(32)) {
> /*
> diff --git a/drivers/iommu/intel-svm.c b/drivers/iommu/intel-svm.c
> index 9b159132405d..602caca3cd1a 100644
> --- a/drivers/iommu/intel-svm.c
> +++ b/drivers/iommu/intel-svm.c
> @@ -115,7 +115,7 @@ static void intel_flush_svm_range_dev (struct intel_svm *svm, struct intel_svm_d
> QI_EIOTLB_TYPE;
> desc.qw1 = 0;
> } else {
> - int mask = ilog2(__roundup_pow_of_two(pages));
> + int mask = ilog2(roundup_pow_of_two(pages));
>
> desc.qw0 = QI_EIOTLB_PASID(svm->pasid) |
> QI_EIOTLB_DID(sdev->did) |
> @@ -142,7 +142,7 @@ static void intel_flush_svm_range_dev (struct intel_svm *svm, struct intel_svm_d
> * for example, an "address" value of 0x12345f000 will
> * flush from 0x123440000 to 0x12347ffff (256KiB). */
> unsigned long last = address + ((unsigned long)(pages - 1) << VTD_PAGE_SHIFT);
> - unsigned long mask = __rounddown_pow_of_two(address ^ last);
> + unsigned long mask = rounddown_pow_of_two(address ^ last);
>
> desc.qw1 = QI_DEV_EIOTLB_ADDR((address & ~mask) |
> (mask - 1)) | QI_DEV_EIOTLB_SIZE;
> diff --git a/drivers/iommu/intel_irq_remapping.c b/drivers/iommu/intel_irq_remapping.c
> index 81e43c1df7ec..935657b2c661 100644
> --- a/drivers/iommu/intel_irq_remapping.c
> +++ b/drivers/iommu/intel_irq_remapping.c
> @@ -113,7 +113,7 @@ static int alloc_irte(struct intel_iommu *iommu,
> return -1;
>
> if (count > 1) {
> - count = __roundup_pow_of_two(count);
> + count = roundup_pow_of_two(count);
> mask = ilog2(count);
> }
>
> diff --git a/drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c b/drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c
> index 6a757dadb5f1..fd5b12c23eaa 100644
> --- a/drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c
> +++ b/drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c
> @@ -680,13 +680,13 @@ static int xgbe_set_ringparam(struct net_device *netdev,
> return -EINVAL;
> }
>
> - rx = __rounddown_pow_of_two(ringparam->rx_pending);
> + rx = rounddown_pow_of_two(ringparam->rx_pending);
> if (rx != ringparam->rx_pending)
> netdev_notice(netdev,
> "rx ring parameter rounded to power of two: %u\n",
> rx);
>
> - tx = __rounddown_pow_of_two(ringparam->tx_pending);
> + tx = rounddown_pow_of_two(ringparam->tx_pending);
> if (tx != ringparam->tx_pending)
> netdev_notice(netdev,
> "tx ring parameter rounded to power of two: %u\n",
> diff --git a/drivers/net/ethernet/marvell/sky2.c b/drivers/net/ethernet/marvell/sky2.c
> index 5f56ee83e3b1..cc3a03b4a611 100644
> --- a/drivers/net/ethernet/marvell/sky2.c
> +++ b/drivers/net/ethernet/marvell/sky2.c
> @@ -4139,7 +4139,7 @@ static int sky2_set_coalesce(struct net_device *dev,
> */
> static unsigned long roundup_ring_size(unsigned long pending)
> {
> - return max(128ul, roundup_pow_of_two(pending+1));
> + return max(128ull, roundup_pow_of_two(pending+1));
> }
>
> static void sky2_get_ringparam(struct net_device *dev,
> diff --git a/drivers/net/ethernet/rocker/rocker_hw.h b/drivers/net/ethernet/rocker/rocker_hw.h
> index 59f1f8b690d2..d8de15509e2c 100644
> --- a/drivers/net/ethernet/rocker/rocker_hw.h
> +++ b/drivers/net/ethernet/rocker/rocker_hw.h
> @@ -88,8 +88,8 @@ enum rocker_dma_type {
> };
>
> /* Rocker DMA ring size limits and default sizes */
> -#define ROCKER_DMA_SIZE_MIN 2ul
> -#define ROCKER_DMA_SIZE_MAX 65536ul
> +#define ROCKER_DMA_SIZE_MIN 2ull
> +#define ROCKER_DMA_SIZE_MAX 65536ull
> #define ROCKER_DMA_CMD_DEFAULT_SIZE 32ul
> #define ROCKER_DMA_EVENT_DEFAULT_SIZE 32ul
> #define ROCKER_DMA_TX_DEFAULT_SIZE 64ul
> diff --git a/drivers/net/ethernet/sfc/ef10.c b/drivers/net/ethernet/sfc/ef10.c
> index 4d9bbccc6f89..4f4d9a5b3b75 100644
> --- a/drivers/net/ethernet/sfc/ef10.c
> +++ b/drivers/net/ethernet/sfc/ef10.c
> @@ -27,7 +27,7 @@ enum {
> };
> /* The maximum size of a shared RSS context */
> /* TODO: this should really be from the mcdi protocol export */
> -#define EFX_EF10_MAX_SHARED_RSS_CONTEXT_SIZE 64UL
> +#define EFX_EF10_MAX_SHARED_RSS_CONTEXT_SIZE 64ULL
>
> /* The filter table(s) are managed by firmware and we have write-only
> * access. When removing filters we must identify them to the
> diff --git a/drivers/net/ethernet/sfc/efx.h b/drivers/net/ethernet/sfc/efx.h
> index 2dd8d5002315..fea2add5860e 100644
> --- a/drivers/net/ethernet/sfc/efx.h
> +++ b/drivers/net/ethernet/sfc/efx.h
> @@ -52,7 +52,7 @@ void efx_schedule_slow_fill(struct efx_rx_queue *rx_queue);
>
> #define EFX_MAX_DMAQ_SIZE 4096UL
> #define EFX_DEFAULT_DMAQ_SIZE 1024UL
> -#define EFX_MIN_DMAQ_SIZE 512UL
> +#define EFX_MIN_DMAQ_SIZE 512ULL
>
> #define EFX_MAX_EVQ_SIZE 16384UL
> #define EFX_MIN_EVQ_SIZE 512UL
> diff --git a/drivers/net/ethernet/sfc/falcon/efx.h b/drivers/net/ethernet/sfc/falcon/efx.h
> index d3b4646545fa..0d16257156d6 100644
> --- a/drivers/net/ethernet/sfc/falcon/efx.h
> +++ b/drivers/net/ethernet/sfc/falcon/efx.h
> @@ -55,7 +55,7 @@ void ef4_schedule_slow_fill(struct ef4_rx_queue *rx_queue);
>
> #define EF4_MAX_DMAQ_SIZE 4096UL
> #define EF4_DEFAULT_DMAQ_SIZE 1024UL
> -#define EF4_MIN_DMAQ_SIZE 512UL
> +#define EF4_MIN_DMAQ_SIZE 512ULL
>
> #define EF4_MAX_EVQ_SIZE 16384UL
> #define EF4_MIN_EVQ_SIZE 512UL
> diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c
> index c7709e49f0e4..f0391e88bc42 100644
> --- a/drivers/pci/msi.c
> +++ b/drivers/pci/msi.c
> @@ -578,7 +578,7 @@ msi_setup_entry(struct pci_dev *dev, int nvec, struct irq_affinity *affd)
> entry->msi_attrib.maskbit = !!(control & PCI_MSI_FLAGS_MASKBIT);
> entry->msi_attrib.default_irq = dev->irq; /* Save IOAPIC IRQ */
> entry->msi_attrib.multi_cap = (control & PCI_MSI_FLAGS_QMASK) >> 1;
> - entry->msi_attrib.multiple = ilog2(__roundup_pow_of_two(nvec));
> + entry->msi_attrib.multiple = ilog2(roundup_pow_of_two(nvec));
>
> if (control & PCI_MSI_FLAGS_64BIT)
> entry->mask_pos = dev->msi_cap + PCI_MSI_MASK_64;
> diff --git a/include/linux/log2.h b/include/linux/log2.h
> index 83a4a3ca3e8a..53a727303dac 100644
> --- a/include/linux/log2.h
> +++ b/include/linux/log2.h
> @@ -47,26 +47,6 @@ bool is_power_of_2(unsigned long n)
> return (n != 0 && ((n & (n - 1)) == 0));
> }
>
> -/**
> - * __roundup_pow_of_two() - round up to nearest power of two
> - * @n: value to round up
> - */
> -static inline __attribute__((const))
> -unsigned long __roundup_pow_of_two(unsigned long n)
> -{
> - return 1UL << fls_long(n - 1);
> -}
> -
> -/**
> - * __rounddown_pow_of_two() - round down to nearest power of two
> - * @n: value to round down
> - */
> -static inline __attribute__((const))
> -unsigned long __rounddown_pow_of_two(unsigned long n)
> -{
> - return 1UL << (fls_long(n) - 1);
> -}
> -
> /**
> * const_ilog2 - log base 2 of 32-bit or a 64-bit constant unsigned value
> * @n: parameter
> @@ -170,14 +150,11 @@ unsigned long __rounddown_pow_of_two(unsigned long n)
> * - the result is undefined when n == 0
> * - this can be used to initialise global variables from constant data
> */
> -#define roundup_pow_of_two(n) \
> -( \
> - __builtin_constant_p(n) ? ( \
> - (n == 1) ? 1 : \
> - (1UL << (ilog2((n) - 1) + 1)) \
> - ) : \
> - __roundup_pow_of_two(n) \
> - )
> +#define roundup_pow_of_two(n) \
> +( \
> + (__builtin_constant_p(n) && ((n) == 1)) ? \
> + 1 : (1ULL << (ilog2((n) - 1) + 1)) \
> +)
>
> /**
> * rounddown_pow_of_two - round the given value down to nearest power of two
> @@ -187,12 +164,11 @@ unsigned long __rounddown_pow_of_two(unsigned long n)
> * - the result is undefined when n == 0
> * - this can be used to initialise global variables from constant data
> */
> -#define rounddown_pow_of_two(n) \
> -( \
> - __builtin_constant_p(n) ? ( \
> - (1UL << ilog2(n))) : \
> - __rounddown_pow_of_two(n) \
> - )
> +#define rounddown_pow_of_two(n) \
> +( \
> + (__builtin_constant_p(n) && ((n) == 1)) ? \
> + 1 : (1ULL << (ilog2(n))) \
> +)
>
> static inline __attribute_const__
> int __order_base_2(unsigned long n)
> diff --git a/kernel/kexec_core.c b/kernel/kexec_core.c
> index 15d70a90b50d..bb9efc6944a4 100644
> --- a/kernel/kexec_core.c
> +++ b/kernel/kexec_core.c
> @@ -1094,7 +1094,8 @@ static int __init crash_notes_memory_init(void)
> * crash_notes is allocated inside one physical page.
> */
> size = sizeof(note_buf_t);
> - align = min(roundup_pow_of_two(sizeof(note_buf_t)), PAGE_SIZE);
> + align = min(roundup_pow_of_two(sizeof(note_buf_t)),
> + (unsigned long long)PAGE_SIZE);
>
> /*
> * Break compile if size is bigger than PAGE_SIZE since crash_notes
> diff --git a/lib/rhashtable.c b/lib/rhashtable.c
> index bdb7e4cadf05..70908678c7a8 100644
> --- a/lib/rhashtable.c
> +++ b/lib/rhashtable.c
> @@ -950,7 +950,7 @@ static size_t rounded_hashtable_size(const struct rhashtable_params *params)
>
> if (params->nelem_hint)
> retsize = max(roundup_pow_of_two(params->nelem_hint * 4 / 3),
> - (unsigned long)params->min_size);
> + (unsigned long long)params->min_size);
> else
> retsize = max(HASH_DEFAULT_SIZE,
> (unsigned long)params->min_size);
> diff --git a/net/sunrpc/xprtrdma/verbs.c b/net/sunrpc/xprtrdma/verbs.c
> index 77c7dd7f05e8..78fb8ccabddd 100644
> --- a/net/sunrpc/xprtrdma/verbs.c
> +++ b/net/sunrpc/xprtrdma/verbs.c
> @@ -1015,7 +1015,7 @@ struct rpcrdma_req *rpcrdma_req_create(struct rpcrdma_xprt *r_xprt, size_t size,
> maxhdrsize = rpcrdma_fixed_maxsz + 3 +
> r_xprt->rx_ia.ri_max_segs * rpcrdma_readchunk_maxsz;
> maxhdrsize *= sizeof(__be32);
> - rb = rpcrdma_regbuf_alloc(__roundup_pow_of_two(maxhdrsize),
> + rb = rpcrdma_regbuf_alloc(roundup_pow_of_two(maxhdrsize),
> DMA_TO_DEVICE, flags);
> if (!rb)
> goto out2;
>
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^ permalink raw reply [flat|nested] 71+ messages in thread
* Re: [PATCH v4 7/8] linux/log2.h: Fix 64bit calculations in roundup/down_pow_two()
@ 2019-12-05 17:48 ` Robin Murphy
0 siblings, 0 replies; 71+ messages in thread
From: Robin Murphy @ 2019-12-05 17:48 UTC (permalink / raw)
To: Nicolas Saenz Julienne, andrew.murray, maz, linux-kernel,
Michael Turquette, Stephen Boyd, Emilio López,
Maxime Ripard, Chen-Yu Tsai, Mike Marciniszyn,
Dennis Dalessandro, Yishai Hadas, Moni Shoua, David Woodhouse,
Lu Baolu, Joerg Roedel, Tom Lendacky, Mirko Lindner,
Stephen Hemminger, Jiri Pirko, Solarflare linux maintainers,
Edward Cree, Martin Habets, Bjorn Helgaas, Eric Biederman,
Thomas Graf, Herbert Xu
Cc: linux-pci, J. Bruce Fields, linux-clk, f.fainelli, linux-rdma,
phil, Jason Gunthorpe, Doug Ledford, linux-rpi-kernel,
Trond Myklebust, linux-arm-kernel, linux-nfs, mbrugger, netdev,
kexec, jeremy.linton, David S. Miller, iommu, Chuck Lever,
wahrenst, james.quinlan, Anna Schumaker, Robin Murphy
On 03/12/2019 11:47 am, Nicolas Saenz Julienne wrote:
> Some users need to make sure their rounding function accepts and returns
> 64bit long variables regardless of the architecture. Sadly
> roundup/rounddown_pow_two() takes and returns unsigned longs. It turns
> out ilog2() already handles 32/64bit calculations properly, and being
> the building block to the round functions we can rework them as a
> wrapper around it.
Neat! Although all the additional ULL casts this introduces seem
somewhat unwelcome - I suppose the (1ULL << (ilog2(n))) makes it
effectively always return unsigned long long now. Might it make sense to
cast the return value to typeof(n) to avoid this slightly non-obvious
behaviour (and the associated churn)?
Robin.
> Suggested-by: Robin Murphy <robin.murphy@arm.con>
> Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
> ---
> drivers/clk/clk-divider.c | 8 ++--
> drivers/clk/sunxi/clk-sunxi.c | 2 +-
> drivers/infiniband/hw/hfi1/chip.c | 4 +-
> drivers/infiniband/hw/hfi1/init.c | 4 +-
> drivers/infiniband/hw/mlx4/srq.c | 2 +-
> drivers/infiniband/hw/mthca/mthca_srq.c | 2 +-
> drivers/infiniband/sw/rxe/rxe_qp.c | 4 +-
> drivers/iommu/intel-iommu.c | 4 +-
> drivers/iommu/intel-svm.c | 4 +-
> drivers/iommu/intel_irq_remapping.c | 2 +-
> drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c | 4 +-
> drivers/net/ethernet/marvell/sky2.c | 2 +-
> drivers/net/ethernet/rocker/rocker_hw.h | 4 +-
> drivers/net/ethernet/sfc/ef10.c | 2 +-
> drivers/net/ethernet/sfc/efx.h | 2 +-
> drivers/net/ethernet/sfc/falcon/efx.h | 2 +-
> drivers/pci/msi.c | 2 +-
> include/linux/log2.h | 44 +++++---------------
> kernel/kexec_core.c | 3 +-
> lib/rhashtable.c | 2 +-
> net/sunrpc/xprtrdma/verbs.c | 2 +-
> 21 files changed, 41 insertions(+), 64 deletions(-)
>
> diff --git a/drivers/clk/clk-divider.c b/drivers/clk/clk-divider.c
> index 098b2b01f0af..ba947e4c8193 100644
> --- a/drivers/clk/clk-divider.c
> +++ b/drivers/clk/clk-divider.c
> @@ -222,7 +222,7 @@ static int _div_round_up(const struct clk_div_table *table,
> int div = DIV_ROUND_UP_ULL((u64)parent_rate, rate);
>
> if (flags & CLK_DIVIDER_POWER_OF_TWO)
> - div = __roundup_pow_of_two(div);
> + div = roundup_pow_of_two(div);
> if (table)
> div = _round_up_table(table, div);
>
> @@ -240,8 +240,8 @@ static int _div_round_closest(const struct clk_div_table *table,
> down = parent_rate / rate;
>
> if (flags & CLK_DIVIDER_POWER_OF_TWO) {
> - up = __roundup_pow_of_two(up);
> - down = __rounddown_pow_of_two(down);
> + up = roundup_pow_of_two(up);
> + down = rounddown_pow_of_two(down);
> } else if (table) {
> up = _round_up_table(table, up);
> down = _round_down_table(table, down);
> @@ -278,7 +278,7 @@ static int _next_div(const struct clk_div_table *table, int div,
> div++;
>
> if (flags & CLK_DIVIDER_POWER_OF_TWO)
> - return __roundup_pow_of_two(div);
> + return roundup_pow_of_two(div);
> if (table)
> return _round_up_table(table, div);
>
> diff --git a/drivers/clk/sunxi/clk-sunxi.c b/drivers/clk/sunxi/clk-sunxi.c
> index 27201fd26e44..faec99dc09c0 100644
> --- a/drivers/clk/sunxi/clk-sunxi.c
> +++ b/drivers/clk/sunxi/clk-sunxi.c
> @@ -311,7 +311,7 @@ static void sun6i_get_ahb1_factors(struct factors_request *req)
>
> calcm = DIV_ROUND_UP(div, 1 << calcp);
> } else {
> - calcp = __roundup_pow_of_two(div);
> + calcp = roundup_pow_of_two(div);
> calcp = calcp > 3 ? 3 : calcp;
> }
>
> diff --git a/drivers/infiniband/hw/hfi1/chip.c b/drivers/infiniband/hw/hfi1/chip.c
> index 9b1fb84a3d45..96b1d343c32f 100644
> --- a/drivers/infiniband/hw/hfi1/chip.c
> +++ b/drivers/infiniband/hw/hfi1/chip.c
> @@ -14199,10 +14199,10 @@ static int qos_rmt_entries(struct hfi1_devdata *dd, unsigned int *mp,
> max_by_vl = krcvqs[i];
> if (max_by_vl > 32)
> goto no_qos;
> - m = ilog2(__roundup_pow_of_two(max_by_vl));
> + m = ilog2(roundup_pow_of_two(max_by_vl));
>
> /* determine bits for vl */
> - n = ilog2(__roundup_pow_of_two(num_vls));
> + n = ilog2(roundup_pow_of_two(num_vls));
>
> /* reject if too much is used */
> if ((m + n) > 7)
> diff --git a/drivers/infiniband/hw/hfi1/init.c b/drivers/infiniband/hw/hfi1/init.c
> index 26b792bb1027..838c789c7cce 100644
> --- a/drivers/infiniband/hw/hfi1/init.c
> +++ b/drivers/infiniband/hw/hfi1/init.c
> @@ -467,7 +467,7 @@ int hfi1_create_ctxtdata(struct hfi1_pportdata *ppd, int numa,
> * MTU supported.
> */
> if (rcd->egrbufs.size < hfi1_max_mtu) {
> - rcd->egrbufs.size = __roundup_pow_of_two(hfi1_max_mtu);
> + rcd->egrbufs.size = roundup_pow_of_two(hfi1_max_mtu);
> hfi1_cdbg(PROC,
> "ctxt%u: eager bufs size too small. Adjusting to %u\n",
> rcd->ctxt, rcd->egrbufs.size);
> @@ -1959,7 +1959,7 @@ int hfi1_setup_eagerbufs(struct hfi1_ctxtdata *rcd)
> * to satisfy the "multiple of 8 RcvArray entries" requirement.
> */
> if (rcd->egrbufs.size <= (1 << 20))
> - rcd->egrbufs.rcvtid_size = max((unsigned long)round_mtu,
> + rcd->egrbufs.rcvtid_size = max((unsigned long long)round_mtu,
> rounddown_pow_of_two(rcd->egrbufs.size / 8));
>
> while (alloced_bytes < rcd->egrbufs.size &&
> diff --git a/drivers/infiniband/hw/mlx4/srq.c b/drivers/infiniband/hw/mlx4/srq.c
> index 8dcf6e3d9ae2..7e685600a7b3 100644
> --- a/drivers/infiniband/hw/mlx4/srq.c
> +++ b/drivers/infiniband/hw/mlx4/srq.c
> @@ -96,7 +96,7 @@ int mlx4_ib_create_srq(struct ib_srq *ib_srq,
> srq->msrq.max = roundup_pow_of_two(init_attr->attr.max_wr + 1);
> srq->msrq.max_gs = init_attr->attr.max_sge;
>
> - desc_size = max(32UL,
> + desc_size = max(32ULL,
> roundup_pow_of_two(sizeof (struct mlx4_wqe_srq_next_seg) +
> srq->msrq.max_gs *
> sizeof (struct mlx4_wqe_data_seg)));
> diff --git a/drivers/infiniband/hw/mthca/mthca_srq.c b/drivers/infiniband/hw/mthca/mthca_srq.c
> index a85935ccce88..0c2e14b4142a 100644
> --- a/drivers/infiniband/hw/mthca/mthca_srq.c
> +++ b/drivers/infiniband/hw/mthca/mthca_srq.c
> @@ -225,7 +225,7 @@ int mthca_alloc_srq(struct mthca_dev *dev, struct mthca_pd *pd,
> else
> srq->max = srq->max + 1;
>
> - ds = max(64UL,
> + ds = max(64ULL,
> roundup_pow_of_two(sizeof (struct mthca_next_seg) +
> srq->max_gs * sizeof (struct mthca_data_seg)));
>
> diff --git a/drivers/infiniband/sw/rxe/rxe_qp.c b/drivers/infiniband/sw/rxe/rxe_qp.c
> index e2c6d1cedf41..040b707b0877 100644
> --- a/drivers/infiniband/sw/rxe/rxe_qp.c
> +++ b/drivers/infiniband/sw/rxe/rxe_qp.c
> @@ -592,7 +592,7 @@ int rxe_qp_from_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask,
> int err;
>
> if (mask & IB_QP_MAX_QP_RD_ATOMIC) {
> - int max_rd_atomic = __roundup_pow_of_two(attr->max_rd_atomic);
> + int max_rd_atomic = roundup_pow_of_two(attr->max_rd_atomic);
>
> qp->attr.max_rd_atomic = max_rd_atomic;
> atomic_set(&qp->req.rd_atomic, max_rd_atomic);
> @@ -600,7 +600,7 @@ int rxe_qp_from_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask,
>
> if (mask & IB_QP_MAX_DEST_RD_ATOMIC) {
> int max_dest_rd_atomic =
> - __roundup_pow_of_two(attr->max_dest_rd_atomic);
> + roundup_pow_of_two(attr->max_dest_rd_atomic);
>
> qp->attr.max_dest_rd_atomic = max_dest_rd_atomic;
>
> diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
> index 0c8d81f56a30..ce7c900bd666 100644
> --- a/drivers/iommu/intel-iommu.c
> +++ b/drivers/iommu/intel-iommu.c
> @@ -1488,7 +1488,7 @@ static void iommu_flush_iotlb_psi(struct intel_iommu *iommu,
> unsigned long pfn, unsigned int pages,
> int ih, int map)
> {
> - unsigned int mask = ilog2(__roundup_pow_of_two(pages));
> + unsigned int mask = ilog2(roundup_pow_of_two(pages));
> uint64_t addr = (uint64_t)pfn << VTD_PAGE_SHIFT;
> u16 did = domain->iommu_did[iommu->seq_id];
>
> @@ -3390,7 +3390,7 @@ static unsigned long intel_alloc_iova(struct device *dev,
> /* Restrict dma_mask to the width that the iommu can handle */
> dma_mask = min_t(uint64_t, DOMAIN_MAX_ADDR(domain->gaw), dma_mask);
> /* Ensure we reserve the whole size-aligned region */
> - nrpages = __roundup_pow_of_two(nrpages);
> + nrpages = roundup_pow_of_two(nrpages);
>
> if (!dmar_forcedac && dma_mask > DMA_BIT_MASK(32)) {
> /*
> diff --git a/drivers/iommu/intel-svm.c b/drivers/iommu/intel-svm.c
> index 9b159132405d..602caca3cd1a 100644
> --- a/drivers/iommu/intel-svm.c
> +++ b/drivers/iommu/intel-svm.c
> @@ -115,7 +115,7 @@ static void intel_flush_svm_range_dev (struct intel_svm *svm, struct intel_svm_d
> QI_EIOTLB_TYPE;
> desc.qw1 = 0;
> } else {
> - int mask = ilog2(__roundup_pow_of_two(pages));
> + int mask = ilog2(roundup_pow_of_two(pages));
>
> desc.qw0 = QI_EIOTLB_PASID(svm->pasid) |
> QI_EIOTLB_DID(sdev->did) |
> @@ -142,7 +142,7 @@ static void intel_flush_svm_range_dev (struct intel_svm *svm, struct intel_svm_d
> * for example, an "address" value of 0x12345f000 will
> * flush from 0x123440000 to 0x12347ffff (256KiB). */
> unsigned long last = address + ((unsigned long)(pages - 1) << VTD_PAGE_SHIFT);
> - unsigned long mask = __rounddown_pow_of_two(address ^ last);
> + unsigned long mask = rounddown_pow_of_two(address ^ last);
>
> desc.qw1 = QI_DEV_EIOTLB_ADDR((address & ~mask) |
> (mask - 1)) | QI_DEV_EIOTLB_SIZE;
> diff --git a/drivers/iommu/intel_irq_remapping.c b/drivers/iommu/intel_irq_remapping.c
> index 81e43c1df7ec..935657b2c661 100644
> --- a/drivers/iommu/intel_irq_remapping.c
> +++ b/drivers/iommu/intel_irq_remapping.c
> @@ -113,7 +113,7 @@ static int alloc_irte(struct intel_iommu *iommu,
> return -1;
>
> if (count > 1) {
> - count = __roundup_pow_of_two(count);
> + count = roundup_pow_of_two(count);
> mask = ilog2(count);
> }
>
> diff --git a/drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c b/drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c
> index 6a757dadb5f1..fd5b12c23eaa 100644
> --- a/drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c
> +++ b/drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c
> @@ -680,13 +680,13 @@ static int xgbe_set_ringparam(struct net_device *netdev,
> return -EINVAL;
> }
>
> - rx = __rounddown_pow_of_two(ringparam->rx_pending);
> + rx = rounddown_pow_of_two(ringparam->rx_pending);
> if (rx != ringparam->rx_pending)
> netdev_notice(netdev,
> "rx ring parameter rounded to power of two: %u\n",
> rx);
>
> - tx = __rounddown_pow_of_two(ringparam->tx_pending);
> + tx = rounddown_pow_of_two(ringparam->tx_pending);
> if (tx != ringparam->tx_pending)
> netdev_notice(netdev,
> "tx ring parameter rounded to power of two: %u\n",
> diff --git a/drivers/net/ethernet/marvell/sky2.c b/drivers/net/ethernet/marvell/sky2.c
> index 5f56ee83e3b1..cc3a03b4a611 100644
> --- a/drivers/net/ethernet/marvell/sky2.c
> +++ b/drivers/net/ethernet/marvell/sky2.c
> @@ -4139,7 +4139,7 @@ static int sky2_set_coalesce(struct net_device *dev,
> */
> static unsigned long roundup_ring_size(unsigned long pending)
> {
> - return max(128ul, roundup_pow_of_two(pending+1));
> + return max(128ull, roundup_pow_of_two(pending+1));
> }
>
> static void sky2_get_ringparam(struct net_device *dev,
> diff --git a/drivers/net/ethernet/rocker/rocker_hw.h b/drivers/net/ethernet/rocker/rocker_hw.h
> index 59f1f8b690d2..d8de15509e2c 100644
> --- a/drivers/net/ethernet/rocker/rocker_hw.h
> +++ b/drivers/net/ethernet/rocker/rocker_hw.h
> @@ -88,8 +88,8 @@ enum rocker_dma_type {
> };
>
> /* Rocker DMA ring size limits and default sizes */
> -#define ROCKER_DMA_SIZE_MIN 2ul
> -#define ROCKER_DMA_SIZE_MAX 65536ul
> +#define ROCKER_DMA_SIZE_MIN 2ull
> +#define ROCKER_DMA_SIZE_MAX 65536ull
> #define ROCKER_DMA_CMD_DEFAULT_SIZE 32ul
> #define ROCKER_DMA_EVENT_DEFAULT_SIZE 32ul
> #define ROCKER_DMA_TX_DEFAULT_SIZE 64ul
> diff --git a/drivers/net/ethernet/sfc/ef10.c b/drivers/net/ethernet/sfc/ef10.c
> index 4d9bbccc6f89..4f4d9a5b3b75 100644
> --- a/drivers/net/ethernet/sfc/ef10.c
> +++ b/drivers/net/ethernet/sfc/ef10.c
> @@ -27,7 +27,7 @@ enum {
> };
> /* The maximum size of a shared RSS context */
> /* TODO: this should really be from the mcdi protocol export */
> -#define EFX_EF10_MAX_SHARED_RSS_CONTEXT_SIZE 64UL
> +#define EFX_EF10_MAX_SHARED_RSS_CONTEXT_SIZE 64ULL
>
> /* The filter table(s) are managed by firmware and we have write-only
> * access. When removing filters we must identify them to the
> diff --git a/drivers/net/ethernet/sfc/efx.h b/drivers/net/ethernet/sfc/efx.h
> index 2dd8d5002315..fea2add5860e 100644
> --- a/drivers/net/ethernet/sfc/efx.h
> +++ b/drivers/net/ethernet/sfc/efx.h
> @@ -52,7 +52,7 @@ void efx_schedule_slow_fill(struct efx_rx_queue *rx_queue);
>
> #define EFX_MAX_DMAQ_SIZE 4096UL
> #define EFX_DEFAULT_DMAQ_SIZE 1024UL
> -#define EFX_MIN_DMAQ_SIZE 512UL
> +#define EFX_MIN_DMAQ_SIZE 512ULL
>
> #define EFX_MAX_EVQ_SIZE 16384UL
> #define EFX_MIN_EVQ_SIZE 512UL
> diff --git a/drivers/net/ethernet/sfc/falcon/efx.h b/drivers/net/ethernet/sfc/falcon/efx.h
> index d3b4646545fa..0d16257156d6 100644
> --- a/drivers/net/ethernet/sfc/falcon/efx.h
> +++ b/drivers/net/ethernet/sfc/falcon/efx.h
> @@ -55,7 +55,7 @@ void ef4_schedule_slow_fill(struct ef4_rx_queue *rx_queue);
>
> #define EF4_MAX_DMAQ_SIZE 4096UL
> #define EF4_DEFAULT_DMAQ_SIZE 1024UL
> -#define EF4_MIN_DMAQ_SIZE 512UL
> +#define EF4_MIN_DMAQ_SIZE 512ULL
>
> #define EF4_MAX_EVQ_SIZE 16384UL
> #define EF4_MIN_EVQ_SIZE 512UL
> diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c
> index c7709e49f0e4..f0391e88bc42 100644
> --- a/drivers/pci/msi.c
> +++ b/drivers/pci/msi.c
> @@ -578,7 +578,7 @@ msi_setup_entry(struct pci_dev *dev, int nvec, struct irq_affinity *affd)
> entry->msi_attrib.maskbit = !!(control & PCI_MSI_FLAGS_MASKBIT);
> entry->msi_attrib.default_irq = dev->irq; /* Save IOAPIC IRQ */
> entry->msi_attrib.multi_cap = (control & PCI_MSI_FLAGS_QMASK) >> 1;
> - entry->msi_attrib.multiple = ilog2(__roundup_pow_of_two(nvec));
> + entry->msi_attrib.multiple = ilog2(roundup_pow_of_two(nvec));
>
> if (control & PCI_MSI_FLAGS_64BIT)
> entry->mask_pos = dev->msi_cap + PCI_MSI_MASK_64;
> diff --git a/include/linux/log2.h b/include/linux/log2.h
> index 83a4a3ca3e8a..53a727303dac 100644
> --- a/include/linux/log2.h
> +++ b/include/linux/log2.h
> @@ -47,26 +47,6 @@ bool is_power_of_2(unsigned long n)
> return (n != 0 && ((n & (n - 1)) == 0));
> }
>
> -/**
> - * __roundup_pow_of_two() - round up to nearest power of two
> - * @n: value to round up
> - */
> -static inline __attribute__((const))
> -unsigned long __roundup_pow_of_two(unsigned long n)
> -{
> - return 1UL << fls_long(n - 1);
> -}
> -
> -/**
> - * __rounddown_pow_of_two() - round down to nearest power of two
> - * @n: value to round down
> - */
> -static inline __attribute__((const))
> -unsigned long __rounddown_pow_of_two(unsigned long n)
> -{
> - return 1UL << (fls_long(n) - 1);
> -}
> -
> /**
> * const_ilog2 - log base 2 of 32-bit or a 64-bit constant unsigned value
> * @n: parameter
> @@ -170,14 +150,11 @@ unsigned long __rounddown_pow_of_two(unsigned long n)
> * - the result is undefined when n == 0
> * - this can be used to initialise global variables from constant data
> */
> -#define roundup_pow_of_two(n) \
> -( \
> - __builtin_constant_p(n) ? ( \
> - (n == 1) ? 1 : \
> - (1UL << (ilog2((n) - 1) + 1)) \
> - ) : \
> - __roundup_pow_of_two(n) \
> - )
> +#define roundup_pow_of_two(n) \
> +( \
> + (__builtin_constant_p(n) && ((n) == 1)) ? \
> + 1 : (1ULL << (ilog2((n) - 1) + 1)) \
> +)
>
> /**
> * rounddown_pow_of_two - round the given value down to nearest power of two
> @@ -187,12 +164,11 @@ unsigned long __rounddown_pow_of_two(unsigned long n)
> * - the result is undefined when n == 0
> * - this can be used to initialise global variables from constant data
> */
> -#define rounddown_pow_of_two(n) \
> -( \
> - __builtin_constant_p(n) ? ( \
> - (1UL << ilog2(n))) : \
> - __rounddown_pow_of_two(n) \
> - )
> +#define rounddown_pow_of_two(n) \
> +( \
> + (__builtin_constant_p(n) && ((n) == 1)) ? \
> + 1 : (1ULL << (ilog2(n))) \
> +)
>
> static inline __attribute_const__
> int __order_base_2(unsigned long n)
> diff --git a/kernel/kexec_core.c b/kernel/kexec_core.c
> index 15d70a90b50d..bb9efc6944a4 100644
> --- a/kernel/kexec_core.c
> +++ b/kernel/kexec_core.c
> @@ -1094,7 +1094,8 @@ static int __init crash_notes_memory_init(void)
> * crash_notes is allocated inside one physical page.
> */
> size = sizeof(note_buf_t);
> - align = min(roundup_pow_of_two(sizeof(note_buf_t)), PAGE_SIZE);
> + align = min(roundup_pow_of_two(sizeof(note_buf_t)),
> + (unsigned long long)PAGE_SIZE);
>
> /*
> * Break compile if size is bigger than PAGE_SIZE since crash_notes
> diff --git a/lib/rhashtable.c b/lib/rhashtable.c
> index bdb7e4cadf05..70908678c7a8 100644
> --- a/lib/rhashtable.c
> +++ b/lib/rhashtable.c
> @@ -950,7 +950,7 @@ static size_t rounded_hashtable_size(const struct rhashtable_params *params)
>
> if (params->nelem_hint)
> retsize = max(roundup_pow_of_two(params->nelem_hint * 4 / 3),
> - (unsigned long)params->min_size);
> + (unsigned long long)params->min_size);
> else
> retsize = max(HASH_DEFAULT_SIZE,
> (unsigned long)params->min_size);
> diff --git a/net/sunrpc/xprtrdma/verbs.c b/net/sunrpc/xprtrdma/verbs.c
> index 77c7dd7f05e8..78fb8ccabddd 100644
> --- a/net/sunrpc/xprtrdma/verbs.c
> +++ b/net/sunrpc/xprtrdma/verbs.c
> @@ -1015,7 +1015,7 @@ struct rpcrdma_req *rpcrdma_req_create(struct rpcrdma_xprt *r_xprt, size_t size,
> maxhdrsize = rpcrdma_fixed_maxsz + 3 +
> r_xprt->rx_ia.ri_max_segs * rpcrdma_readchunk_maxsz;
> maxhdrsize *= sizeof(__be32);
> - rb = rpcrdma_regbuf_alloc(__roundup_pow_of_two(maxhdrsize),
> + rb = rpcrdma_regbuf_alloc(roundup_pow_of_two(maxhdrsize),
> DMA_TO_DEVICE, flags);
> if (!rb)
> goto out2;
>
_______________________________________________
kexec mailing list
kexec@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/kexec
^ permalink raw reply [flat|nested] 71+ messages in thread
* Re: [PATCH v4 8/8] linux/log2.h: Use roundup/dow_pow_two() on 64bit calculations
2019-12-03 11:47 ` Nicolas Saenz Julienne
(?)
(?)
@ 2019-12-05 20:38 ` Bjorn Helgaas
-1 siblings, 0 replies; 71+ messages in thread
From: Bjorn Helgaas @ 2019-12-05 20:38 UTC (permalink / raw)
To: Nicolas Saenz Julienne
Cc: andrew.murray, maz, linux-kernel, Lorenzo Pieralisi, Hanjun Guo,
Sudeep Holla, Tariq Toukan, Rob Herring, Frank Rowand,
Florian Fainelli, bcm-kernel-feedback-list, Eric Anholt,
Stefan Wahren, Shawn Lin, Heiko Stuebner, Christoph Hellwig,
Marek Szyprowski, Robin Murphy, james.quinlan, mbrugger, phil,
jeremy.linton, linux-pci, linux-rpi-kernel, Rafael J. Wysocki,
Len Brown, David S. Miller, linux-acpi, linux-arm-kernel, netdev,
linux-rdma, devicetree, linux-rockchip, iommu
The subject contains a couple typos: it's missing "of" and it's
missing the "n" on "down".
On Tue, Dec 03, 2019 at 12:47:41PM +0100, Nicolas Saenz Julienne wrote:
> The function now is safe to use while expecting a 64bit value. Use it
> where relevant.
Please include the function names ("roundup_pow_of_two()",
"rounddown_pow_of_two()") in the changelog so it is self-contained and
doesn't depend on the subject.
> Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
With the nits above and below addressed,
Acked-by: Bjorn Helgaas <bhelgaas@google.com> # drivers/pci
> ---
> drivers/acpi/arm64/iort.c | 2 +-
> drivers/net/ethernet/mellanox/mlx4/en_clock.c | 3 ++-
> drivers/of/device.c | 3 ++-
> drivers/pci/controller/cadence/pcie-cadence-ep.c | 3 ++-
> drivers/pci/controller/cadence/pcie-cadence.c | 3 ++-
> drivers/pci/controller/pcie-brcmstb.c | 3 ++-
> drivers/pci/controller/pcie-rockchip-ep.c | 5 +++--
> kernel/dma/direct.c | 2 +-
> 8 files changed, 15 insertions(+), 9 deletions(-)
> --- a/drivers/pci/controller/cadence/pcie-cadence-ep.c
> +++ b/drivers/pci/controller/cadence/pcie-cadence-ep.c
> @@ -10,6 +10,7 @@
> #include <linux/platform_device.h>
> #include <linux/pm_runtime.h>
> #include <linux/sizes.h>
> +#include <linux/log2.h>
>
> #include "pcie-cadence.h"
>
> @@ -65,7 +66,7 @@ static int cdns_pcie_ep_set_bar(struct pci_epc *epc, u8 fn,
> * roundup_pow_of_two() returns an unsigned long, which is not suited
> * for 64bit values.
> */
Please remove the comment above since it no longer applies.
> - sz = 1ULL << fls64(sz - 1);
> + sz = roundup_pow_of_two(sz);
> aperture = ilog2(sz) - 7; /* 128B -> 0, 256B -> 1, 512B -> 2, ... */
>
> if ((flags & PCI_BASE_ADDRESS_SPACE) == PCI_BASE_ADDRESS_SPACE_IO) {
> diff --git a/drivers/pci/controller/cadence/pcie-cadence.c b/drivers/pci/controller/cadence/pcie-cadence.c
> index cd795f6fc1e2..b1689f725b41 100644
> --- a/drivers/pci/controller/cadence/pcie-cadence.c
> +++ b/drivers/pci/controller/cadence/pcie-cadence.c
> @@ -4,6 +4,7 @@
> // Author: Cyrille Pitchen <cyrille.pitchen@free-electrons.com>
>
> #include <linux/kernel.h>
> +#include <linux/log2.h>
>
> #include "pcie-cadence.h"
>
> @@ -15,7 +16,7 @@ void cdns_pcie_set_outbound_region(struct cdns_pcie *pcie, u8 fn,
> * roundup_pow_of_two() returns an unsigned long, which is not suited
> * for 64bit values.
> */
Same here.
> - u64 sz = 1ULL << fls64(size - 1);
> + u64 sz = roundup_pow_of_two(size);
> int nbits = ilog2(sz);
> u32 addr0, addr1, desc0, desc1;
>
> --- a/drivers/pci/controller/pcie-rockchip-ep.c
> +++ b/drivers/pci/controller/pcie-rockchip-ep.c
> @@ -16,6 +16,7 @@
> #include <linux/platform_device.h>
> #include <linux/pci-epf.h>
> #include <linux/sizes.h>
> +#include <linux/log2.h>
>
> #include "pcie-rockchip.h"
>
> @@ -70,7 +71,7 @@ static void rockchip_pcie_prog_ep_ob_atu(struct rockchip_pcie *rockchip, u8 fn,
> u32 r, u32 type, u64 cpu_addr,
> u64 pci_addr, size_t size)
> {
> - u64 sz = 1ULL << fls64(size - 1);
> + u64 sz = roundup_pow_of_two(size);
> int num_pass_bits = ilog2(sz);
> u32 addr0, addr1, desc0, desc1;
> bool is_nor_msg = (type == AXI_WRAPPER_NOR_MSG);
> @@ -176,7 +177,7 @@ static int rockchip_pcie_ep_set_bar(struct pci_epc *epc, u8 fn,
> * roundup_pow_of_two() returns an unsigned long, which is not suited
> * for 64bit values.
> */
And here.
> - sz = 1ULL << fls64(sz - 1);
> + sz = roundup_pow_of_two(sz);
> aperture = ilog2(sz) - 7; /* 128B -> 0, 256B -> 1, 512B -> 2, ... */
>
> if ((flags & PCI_BASE_ADDRESS_SPACE) == PCI_BASE_ADDRESS_SPACE_IO) {
> diff --git a/kernel/dma/direct.c b/kernel/dma/direct.c
> index 6af7ae83c4ad..056886c4efec 100644
> --- a/kernel/dma/direct.c
> +++ b/kernel/dma/direct.c
> @@ -53,7 +53,7 @@ u64 dma_direct_get_required_mask(struct device *dev)
> {
> u64 max_dma = phys_to_dma_direct(dev, (max_pfn - 1) << PAGE_SHIFT);
>
> - return (1ULL << (fls64(max_dma) - 1)) * 2 - 1;
> + return rounddown_pow_of_two(max_dma) * 2 - 1;
Personally I would probably make this one a separate patch since it's
qualitatively different than the others and it would avoid the slight
awkwardness of the non-greppable "roundup/down_pow_of_two()"
construction in the commit subject.
But it's fine either way.
> }
>
> static gfp_t __dma_direct_optimal_gfp_mask(struct device *dev, u64 dma_mask,
> --
> 2.24.0
>
^ permalink raw reply [flat|nested] 71+ messages in thread
* Re: [PATCH v4 8/8] linux/log2.h: Use roundup/dow_pow_two() on 64bit calculations
@ 2019-12-05 20:38 ` Bjorn Helgaas
0 siblings, 0 replies; 71+ messages in thread
From: Bjorn Helgaas @ 2019-12-05 20:38 UTC (permalink / raw)
To: Nicolas Saenz Julienne
Cc: andrew.murray, maz, linux-kernel, Lorenzo Pieralisi, Hanjun Guo,
Sudeep Holla, Tariq Toukan, Rob Herring, Frank Rowand,
Florian Fainelli, bcm-kernel-feedback-list, Eric Anholt,
Stefan Wahren, Shawn Lin, Heiko Stuebner, Christoph Hellwig,
Marek Szyprowski, Robin Murphy, james.quinlan, mbrugger, phil,
jeremy.linton, linux-pci
The subject contains a couple typos: it's missing "of" and it's
missing the "n" on "down".
On Tue, Dec 03, 2019 at 12:47:41PM +0100, Nicolas Saenz Julienne wrote:
> The function now is safe to use while expecting a 64bit value. Use it
> where relevant.
Please include the function names ("roundup_pow_of_two()",
"rounddown_pow_of_two()") in the changelog so it is self-contained and
doesn't depend on the subject.
> Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
With the nits above and below addressed,
Acked-by: Bjorn Helgaas <bhelgaas@google.com> # drivers/pci
> ---
> drivers/acpi/arm64/iort.c | 2 +-
> drivers/net/ethernet/mellanox/mlx4/en_clock.c | 3 ++-
> drivers/of/device.c | 3 ++-
> drivers/pci/controller/cadence/pcie-cadence-ep.c | 3 ++-
> drivers/pci/controller/cadence/pcie-cadence.c | 3 ++-
> drivers/pci/controller/pcie-brcmstb.c | 3 ++-
> drivers/pci/controller/pcie-rockchip-ep.c | 5 +++--
> kernel/dma/direct.c | 2 +-
> 8 files changed, 15 insertions(+), 9 deletions(-)
> --- a/drivers/pci/controller/cadence/pcie-cadence-ep.c
> +++ b/drivers/pci/controller/cadence/pcie-cadence-ep.c
> @@ -10,6 +10,7 @@
> #include <linux/platform_device.h>
> #include <linux/pm_runtime.h>
> #include <linux/sizes.h>
> +#include <linux/log2.h>
>
> #include "pcie-cadence.h"
>
> @@ -65,7 +66,7 @@ static int cdns_pcie_ep_set_bar(struct pci_epc *epc, u8 fn,
> * roundup_pow_of_two() returns an unsigned long, which is not suited
> * for 64bit values.
> */
Please remove the comment above since it no longer applies.
> - sz = 1ULL << fls64(sz - 1);
> + sz = roundup_pow_of_two(sz);
> aperture = ilog2(sz) - 7; /* 128B -> 0, 256B -> 1, 512B -> 2, ... */
>
> if ((flags & PCI_BASE_ADDRESS_SPACE) == PCI_BASE_ADDRESS_SPACE_IO) {
> diff --git a/drivers/pci/controller/cadence/pcie-cadence.c b/drivers/pci/controller/cadence/pcie-cadence.c
> index cd795f6fc1e2..b1689f725b41 100644
> --- a/drivers/pci/controller/cadence/pcie-cadence.c
> +++ b/drivers/pci/controller/cadence/pcie-cadence.c
> @@ -4,6 +4,7 @@
> // Author: Cyrille Pitchen <cyrille.pitchen@free-electrons.com>
>
> #include <linux/kernel.h>
> +#include <linux/log2.h>
>
> #include "pcie-cadence.h"
>
> @@ -15,7 +16,7 @@ void cdns_pcie_set_outbound_region(struct cdns_pcie *pcie, u8 fn,
> * roundup_pow_of_two() returns an unsigned long, which is not suited
> * for 64bit values.
> */
Same here.
> - u64 sz = 1ULL << fls64(size - 1);
> + u64 sz = roundup_pow_of_two(size);
> int nbits = ilog2(sz);
> u32 addr0, addr1, desc0, desc1;
>
> --- a/drivers/pci/controller/pcie-rockchip-ep.c
> +++ b/drivers/pci/controller/pcie-rockchip-ep.c
> @@ -16,6 +16,7 @@
> #include <linux/platform_device.h>
> #include <linux/pci-epf.h>
> #include <linux/sizes.h>
> +#include <linux/log2.h>
>
> #include "pcie-rockchip.h"
>
> @@ -70,7 +71,7 @@ static void rockchip_pcie_prog_ep_ob_atu(struct rockchip_pcie *rockchip, u8 fn,
> u32 r, u32 type, u64 cpu_addr,
> u64 pci_addr, size_t size)
> {
> - u64 sz = 1ULL << fls64(size - 1);
> + u64 sz = roundup_pow_of_two(size);
> int num_pass_bits = ilog2(sz);
> u32 addr0, addr1, desc0, desc1;
> bool is_nor_msg = (type == AXI_WRAPPER_NOR_MSG);
> @@ -176,7 +177,7 @@ static int rockchip_pcie_ep_set_bar(struct pci_epc *epc, u8 fn,
> * roundup_pow_of_two() returns an unsigned long, which is not suited
> * for 64bit values.
> */
And here.
> - sz = 1ULL << fls64(sz - 1);
> + sz = roundup_pow_of_two(sz);
> aperture = ilog2(sz) - 7; /* 128B -> 0, 256B -> 1, 512B -> 2, ... */
>
> if ((flags & PCI_BASE_ADDRESS_SPACE) == PCI_BASE_ADDRESS_SPACE_IO) {
> diff --git a/kernel/dma/direct.c b/kernel/dma/direct.c
> index 6af7ae83c4ad..056886c4efec 100644
> --- a/kernel/dma/direct.c
> +++ b/kernel/dma/direct.c
> @@ -53,7 +53,7 @@ u64 dma_direct_get_required_mask(struct device *dev)
> {
> u64 max_dma = phys_to_dma_direct(dev, (max_pfn - 1) << PAGE_SHIFT);
>
> - return (1ULL << (fls64(max_dma) - 1)) * 2 - 1;
> + return rounddown_pow_of_two(max_dma) * 2 - 1;
Personally I would probably make this one a separate patch since it's
qualitatively different than the others and it would avoid the slight
awkwardness of the non-greppable "roundup/down_pow_of_two()"
construction in the commit subject.
But it's fine either way.
> }
>
> static gfp_t __dma_direct_optimal_gfp_mask(struct device *dev, u64 dma_mask,
> --
> 2.24.0
>
^ permalink raw reply [flat|nested] 71+ messages in thread
* Re: [PATCH v4 8/8] linux/log2.h: Use roundup/dow_pow_two() on 64bit calculations
@ 2019-12-05 20:38 ` Bjorn Helgaas
0 siblings, 0 replies; 71+ messages in thread
From: Bjorn Helgaas @ 2019-12-05 20:38 UTC (permalink / raw)
To: Nicolas Saenz Julienne
Cc: Heiko Stuebner, linux-pci, Shawn Lin, Eric Anholt, Hanjun Guo,
Frank Rowand, Christoph Hellwig, Florian Fainelli,
linux-rockchip, linux-rdma, maz, phil, linux-acpi,
bcm-kernel-feedback-list, Len Brown, devicetree,
linux-rpi-kernel, linux-arm-kernel, mbrugger, netdev,
Rafael J. Wysocki, linux-kernel, jeremy.linton, iommu,
Rob Herring, Stefan Wahren, james.quinlan, Sudeep Holla,
Robin Murphy, David S. Miller, Tariq Toukan
The subject contains a couple typos: it's missing "of" and it's
missing the "n" on "down".
On Tue, Dec 03, 2019 at 12:47:41PM +0100, Nicolas Saenz Julienne wrote:
> The function now is safe to use while expecting a 64bit value. Use it
> where relevant.
Please include the function names ("roundup_pow_of_two()",
"rounddown_pow_of_two()") in the changelog so it is self-contained and
doesn't depend on the subject.
> Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
With the nits above and below addressed,
Acked-by: Bjorn Helgaas <bhelgaas@google.com> # drivers/pci
> ---
> drivers/acpi/arm64/iort.c | 2 +-
> drivers/net/ethernet/mellanox/mlx4/en_clock.c | 3 ++-
> drivers/of/device.c | 3 ++-
> drivers/pci/controller/cadence/pcie-cadence-ep.c | 3 ++-
> drivers/pci/controller/cadence/pcie-cadence.c | 3 ++-
> drivers/pci/controller/pcie-brcmstb.c | 3 ++-
> drivers/pci/controller/pcie-rockchip-ep.c | 5 +++--
> kernel/dma/direct.c | 2 +-
> 8 files changed, 15 insertions(+), 9 deletions(-)
> --- a/drivers/pci/controller/cadence/pcie-cadence-ep.c
> +++ b/drivers/pci/controller/cadence/pcie-cadence-ep.c
> @@ -10,6 +10,7 @@
> #include <linux/platform_device.h>
> #include <linux/pm_runtime.h>
> #include <linux/sizes.h>
> +#include <linux/log2.h>
>
> #include "pcie-cadence.h"
>
> @@ -65,7 +66,7 @@ static int cdns_pcie_ep_set_bar(struct pci_epc *epc, u8 fn,
> * roundup_pow_of_two() returns an unsigned long, which is not suited
> * for 64bit values.
> */
Please remove the comment above since it no longer applies.
> - sz = 1ULL << fls64(sz - 1);
> + sz = roundup_pow_of_two(sz);
> aperture = ilog2(sz) - 7; /* 128B -> 0, 256B -> 1, 512B -> 2, ... */
>
> if ((flags & PCI_BASE_ADDRESS_SPACE) == PCI_BASE_ADDRESS_SPACE_IO) {
> diff --git a/drivers/pci/controller/cadence/pcie-cadence.c b/drivers/pci/controller/cadence/pcie-cadence.c
> index cd795f6fc1e2..b1689f725b41 100644
> --- a/drivers/pci/controller/cadence/pcie-cadence.c
> +++ b/drivers/pci/controller/cadence/pcie-cadence.c
> @@ -4,6 +4,7 @@
> // Author: Cyrille Pitchen <cyrille.pitchen@free-electrons.com>
>
> #include <linux/kernel.h>
> +#include <linux/log2.h>
>
> #include "pcie-cadence.h"
>
> @@ -15,7 +16,7 @@ void cdns_pcie_set_outbound_region(struct cdns_pcie *pcie, u8 fn,
> * roundup_pow_of_two() returns an unsigned long, which is not suited
> * for 64bit values.
> */
Same here.
> - u64 sz = 1ULL << fls64(size - 1);
> + u64 sz = roundup_pow_of_two(size);
> int nbits = ilog2(sz);
> u32 addr0, addr1, desc0, desc1;
>
> --- a/drivers/pci/controller/pcie-rockchip-ep.c
> +++ b/drivers/pci/controller/pcie-rockchip-ep.c
> @@ -16,6 +16,7 @@
> #include <linux/platform_device.h>
> #include <linux/pci-epf.h>
> #include <linux/sizes.h>
> +#include <linux/log2.h>
>
> #include "pcie-rockchip.h"
>
> @@ -70,7 +71,7 @@ static void rockchip_pcie_prog_ep_ob_atu(struct rockchip_pcie *rockchip, u8 fn,
> u32 r, u32 type, u64 cpu_addr,
> u64 pci_addr, size_t size)
> {
> - u64 sz = 1ULL << fls64(size - 1);
> + u64 sz = roundup_pow_of_two(size);
> int num_pass_bits = ilog2(sz);
> u32 addr0, addr1, desc0, desc1;
> bool is_nor_msg = (type == AXI_WRAPPER_NOR_MSG);
> @@ -176,7 +177,7 @@ static int rockchip_pcie_ep_set_bar(struct pci_epc *epc, u8 fn,
> * roundup_pow_of_two() returns an unsigned long, which is not suited
> * for 64bit values.
> */
And here.
> - sz = 1ULL << fls64(sz - 1);
> + sz = roundup_pow_of_two(sz);
> aperture = ilog2(sz) - 7; /* 128B -> 0, 256B -> 1, 512B -> 2, ... */
>
> if ((flags & PCI_BASE_ADDRESS_SPACE) == PCI_BASE_ADDRESS_SPACE_IO) {
> diff --git a/kernel/dma/direct.c b/kernel/dma/direct.c
> index 6af7ae83c4ad..056886c4efec 100644
> --- a/kernel/dma/direct.c
> +++ b/kernel/dma/direct.c
> @@ -53,7 +53,7 @@ u64 dma_direct_get_required_mask(struct device *dev)
> {
> u64 max_dma = phys_to_dma_direct(dev, (max_pfn - 1) << PAGE_SHIFT);
>
> - return (1ULL << (fls64(max_dma) - 1)) * 2 - 1;
> + return rounddown_pow_of_two(max_dma) * 2 - 1;
Personally I would probably make this one a separate patch since it's
qualitatively different than the others and it would avoid the slight
awkwardness of the non-greppable "roundup/down_pow_of_two()"
construction in the commit subject.
But it's fine either way.
> }
>
> static gfp_t __dma_direct_optimal_gfp_mask(struct device *dev, u64 dma_mask,
> --
> 2.24.0
>
_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu
^ permalink raw reply [flat|nested] 71+ messages in thread
* Re: [PATCH v4 8/8] linux/log2.h: Use roundup/dow_pow_two() on 64bit calculations
@ 2019-12-05 20:38 ` Bjorn Helgaas
0 siblings, 0 replies; 71+ messages in thread
From: Bjorn Helgaas @ 2019-12-05 20:38 UTC (permalink / raw)
To: Nicolas Saenz Julienne
Cc: Heiko Stuebner, linux-pci, Shawn Lin, Eric Anholt, Hanjun Guo,
Frank Rowand, Christoph Hellwig, Marek Szyprowski,
Florian Fainelli, linux-rockchip, linux-rdma, maz, phil,
linux-acpi, bcm-kernel-feedback-list, Len Brown, devicetree,
Lorenzo Pieralisi, linux-rpi-kernel, linux-arm-kernel, mbrugger,
netdev, Rafael J. Wysocki, linux-kernel, jeremy.linton, iommu,
Rob Herring, Stefan Wahren, james.quinlan, Sudeep Holla,
andrew.murray, Robin Murphy, David S. Miller, Tariq Toukan
The subject contains a couple typos: it's missing "of" and it's
missing the "n" on "down".
On Tue, Dec 03, 2019 at 12:47:41PM +0100, Nicolas Saenz Julienne wrote:
> The function now is safe to use while expecting a 64bit value. Use it
> where relevant.
Please include the function names ("roundup_pow_of_two()",
"rounddown_pow_of_two()") in the changelog so it is self-contained and
doesn't depend on the subject.
> Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
With the nits above and below addressed,
Acked-by: Bjorn Helgaas <bhelgaas@google.com> # drivers/pci
> ---
> drivers/acpi/arm64/iort.c | 2 +-
> drivers/net/ethernet/mellanox/mlx4/en_clock.c | 3 ++-
> drivers/of/device.c | 3 ++-
> drivers/pci/controller/cadence/pcie-cadence-ep.c | 3 ++-
> drivers/pci/controller/cadence/pcie-cadence.c | 3 ++-
> drivers/pci/controller/pcie-brcmstb.c | 3 ++-
> drivers/pci/controller/pcie-rockchip-ep.c | 5 +++--
> kernel/dma/direct.c | 2 +-
> 8 files changed, 15 insertions(+), 9 deletions(-)
> --- a/drivers/pci/controller/cadence/pcie-cadence-ep.c
> +++ b/drivers/pci/controller/cadence/pcie-cadence-ep.c
> @@ -10,6 +10,7 @@
> #include <linux/platform_device.h>
> #include <linux/pm_runtime.h>
> #include <linux/sizes.h>
> +#include <linux/log2.h>
>
> #include "pcie-cadence.h"
>
> @@ -65,7 +66,7 @@ static int cdns_pcie_ep_set_bar(struct pci_epc *epc, u8 fn,
> * roundup_pow_of_two() returns an unsigned long, which is not suited
> * for 64bit values.
> */
Please remove the comment above since it no longer applies.
> - sz = 1ULL << fls64(sz - 1);
> + sz = roundup_pow_of_two(sz);
> aperture = ilog2(sz) - 7; /* 128B -> 0, 256B -> 1, 512B -> 2, ... */
>
> if ((flags & PCI_BASE_ADDRESS_SPACE) == PCI_BASE_ADDRESS_SPACE_IO) {
> diff --git a/drivers/pci/controller/cadence/pcie-cadence.c b/drivers/pci/controller/cadence/pcie-cadence.c
> index cd795f6fc1e2..b1689f725b41 100644
> --- a/drivers/pci/controller/cadence/pcie-cadence.c
> +++ b/drivers/pci/controller/cadence/pcie-cadence.c
> @@ -4,6 +4,7 @@
> // Author: Cyrille Pitchen <cyrille.pitchen@free-electrons.com>
>
> #include <linux/kernel.h>
> +#include <linux/log2.h>
>
> #include "pcie-cadence.h"
>
> @@ -15,7 +16,7 @@ void cdns_pcie_set_outbound_region(struct cdns_pcie *pcie, u8 fn,
> * roundup_pow_of_two() returns an unsigned long, which is not suited
> * for 64bit values.
> */
Same here.
> - u64 sz = 1ULL << fls64(size - 1);
> + u64 sz = roundup_pow_of_two(size);
> int nbits = ilog2(sz);
> u32 addr0, addr1, desc0, desc1;
>
> --- a/drivers/pci/controller/pcie-rockchip-ep.c
> +++ b/drivers/pci/controller/pcie-rockchip-ep.c
> @@ -16,6 +16,7 @@
> #include <linux/platform_device.h>
> #include <linux/pci-epf.h>
> #include <linux/sizes.h>
> +#include <linux/log2.h>
>
> #include "pcie-rockchip.h"
>
> @@ -70,7 +71,7 @@ static void rockchip_pcie_prog_ep_ob_atu(struct rockchip_pcie *rockchip, u8 fn,
> u32 r, u32 type, u64 cpu_addr,
> u64 pci_addr, size_t size)
> {
> - u64 sz = 1ULL << fls64(size - 1);
> + u64 sz = roundup_pow_of_two(size);
> int num_pass_bits = ilog2(sz);
> u32 addr0, addr1, desc0, desc1;
> bool is_nor_msg = (type == AXI_WRAPPER_NOR_MSG);
> @@ -176,7 +177,7 @@ static int rockchip_pcie_ep_set_bar(struct pci_epc *epc, u8 fn,
> * roundup_pow_of_two() returns an unsigned long, which is not suited
> * for 64bit values.
> */
And here.
> - sz = 1ULL << fls64(sz - 1);
> + sz = roundup_pow_of_two(sz);
> aperture = ilog2(sz) - 7; /* 128B -> 0, 256B -> 1, 512B -> 2, ... */
>
> if ((flags & PCI_BASE_ADDRESS_SPACE) == PCI_BASE_ADDRESS_SPACE_IO) {
> diff --git a/kernel/dma/direct.c b/kernel/dma/direct.c
> index 6af7ae83c4ad..056886c4efec 100644
> --- a/kernel/dma/direct.c
> +++ b/kernel/dma/direct.c
> @@ -53,7 +53,7 @@ u64 dma_direct_get_required_mask(struct device *dev)
> {
> u64 max_dma = phys_to_dma_direct(dev, (max_pfn - 1) << PAGE_SHIFT);
>
> - return (1ULL << (fls64(max_dma) - 1)) * 2 - 1;
> + return rounddown_pow_of_two(max_dma) * 2 - 1;
Personally I would probably make this one a separate patch since it's
qualitatively different than the others and it would avoid the slight
awkwardness of the non-greppable "roundup/down_pow_of_two()"
construction in the commit subject.
But it's fine either way.
> }
>
> static gfp_t __dma_direct_optimal_gfp_mask(struct device *dev, u64 dma_mask,
> --
> 2.24.0
>
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply [flat|nested] 71+ messages in thread
* Re: [PATCH v4 7/8] linux/log2.h: Fix 64bit calculations in roundup/down_pow_two()
2019-12-03 11:47 ` Nicolas Saenz Julienne
(?)
(?)
@ 2019-12-05 22:30 ` Bjorn Helgaas
-1 siblings, 0 replies; 71+ messages in thread
From: Bjorn Helgaas @ 2019-12-05 22:30 UTC (permalink / raw)
To: Nicolas Saenz Julienne
Cc: andrew.murray, maz, linux-kernel, Michael Turquette,
Stephen Boyd, Emilio López, Maxime Ripard, Chen-Yu Tsai,
Mike Marciniszyn, Dennis Dalessandro, Yishai Hadas, Moni Shoua,
David Woodhouse, Lu Baolu, Joerg Roedel, Tom Lendacky,
Mirko Lindner, Stephen Hemminger, Jiri Pirko,
Solarflare linux maintainers, Edward Cree, Martin Habets,
Eric Biederman, Thomas Graf, Herbert Xu, james.quinlan, mbrugger,
f.fainelli, phil, wahrenst, jeremy.linton, linux-pci,
linux-rpi-kernel, Robin Murphy, Doug Ledford, Jason Gunthorpe,
David S. Miller, Trond Myklebust, Anna Schumaker,
J. Bruce Fields, Chuck Lever, linux-clk, linux-arm-kernel,
linux-rdma, iommu, netdev, kexec, linux-nfs
You got the "n" on "down" in the subject, but still missing "of" ;)
On Tue, Dec 03, 2019 at 12:47:40PM +0100, Nicolas Saenz Julienne wrote:
> Some users need to make sure their rounding function accepts and returns
> 64bit long variables regardless of the architecture. Sadly
> roundup/rounddown_pow_two() takes and returns unsigned longs. It turns
> out ilog2() already handles 32/64bit calculations properly, and being
> the building block to the round functions we can rework them as a
> wrapper around it.
Missing "of" in the function names here.
s/a wrapper/wrappers/
IIUC the point of this is that roundup_pow_of_two() returned
"unsigned long", which can be either 32 or 64 bits (worth pointing
out, I think), and many callers need something that returns
"unsigned long long" (always 64 bits).
It's a nice simplification to remove the "__" variants. Just as a
casual reader of this commit message, I'd like to know why we had both
the roundup and the __roundup versions in the first place, and why we
no longer need both.
> -#define roundup_pow_of_two(n) \
> -( \
> - __builtin_constant_p(n) ? ( \
> - (n == 1) ? 1 : \
> - (1UL << (ilog2((n) - 1) + 1)) \
> - ) : \
> - __roundup_pow_of_two(n) \
> - )
> +#define roundup_pow_of_two(n) \
> +( \
> + (__builtin_constant_p(n) && ((n) == 1)) ? \
> + 1 : (1ULL << (ilog2((n) - 1) + 1)) \
> +)
Should the resulting type of this expression always be a ULL, even
when n==1, i.e., should it be this?
1ULL : (1ULL << (ilog2((n) - 1) + 1)) \
Or maybe there's no case where that makes a difference?
Bjorn
^ permalink raw reply [flat|nested] 71+ messages in thread
* Re: [PATCH v4 7/8] linux/log2.h: Fix 64bit calculations in roundup/down_pow_two()
@ 2019-12-05 22:30 ` Bjorn Helgaas
0 siblings, 0 replies; 71+ messages in thread
From: Bjorn Helgaas @ 2019-12-05 22:30 UTC (permalink / raw)
To: Nicolas Saenz Julienne
Cc: linux-pci, Michael Turquette, J. Bruce Fields, linux-nfs,
Edward Cree, linux-clk, f.fainelli, Herbert Xu,
Emilio López, maz, phil, Doug Ledford, Jason Gunthorpe,
Chen-Yu Tsai, Chuck Lever, Martin Habets, wahrenst, Tom Lendacky,
Jiri Pirko, Solarflare linux maintainers, Maxime Ripard,
linux-rpi-kernel, Anna Schumaker, Trond Myklebust,
linux-arm-kernel, Mirko Lindner, Mike Marciniszyn, mbrugger,
Stephen Boyd, netdev, Yishai Hadas, kexec, linux-kernel,
jeremy.linton, David S. Miller, Stephen Hemminger, linux-rdma,
iommu, Moni Shoua, Eric Biederman, james.quinlan, Thomas Graf,
Robin Murphy, David Woodhouse, Dennis Dalessandro
You got the "n" on "down" in the subject, but still missing "of" ;)
On Tue, Dec 03, 2019 at 12:47:40PM +0100, Nicolas Saenz Julienne wrote:
> Some users need to make sure their rounding function accepts and returns
> 64bit long variables regardless of the architecture. Sadly
> roundup/rounddown_pow_two() takes and returns unsigned longs. It turns
> out ilog2() already handles 32/64bit calculations properly, and being
> the building block to the round functions we can rework them as a
> wrapper around it.
Missing "of" in the function names here.
s/a wrapper/wrappers/
IIUC the point of this is that roundup_pow_of_two() returned
"unsigned long", which can be either 32 or 64 bits (worth pointing
out, I think), and many callers need something that returns
"unsigned long long" (always 64 bits).
It's a nice simplification to remove the "__" variants. Just as a
casual reader of this commit message, I'd like to know why we had both
the roundup and the __roundup versions in the first place, and why we
no longer need both.
> -#define roundup_pow_of_two(n) \
> -( \
> - __builtin_constant_p(n) ? ( \
> - (n == 1) ? 1 : \
> - (1UL << (ilog2((n) - 1) + 1)) \
> - ) : \
> - __roundup_pow_of_two(n) \
> - )
> +#define roundup_pow_of_two(n) \
> +( \
> + (__builtin_constant_p(n) && ((n) == 1)) ? \
> + 1 : (1ULL << (ilog2((n) - 1) + 1)) \
> +)
Should the resulting type of this expression always be a ULL, even
when n==1, i.e., should it be this?
1ULL : (1ULL << (ilog2((n) - 1) + 1)) \
Or maybe there's no case where that makes a difference?
Bjorn
_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu
^ permalink raw reply [flat|nested] 71+ messages in thread
* Re: [PATCH v4 7/8] linux/log2.h: Fix 64bit calculations in roundup/down_pow_two()
@ 2019-12-05 22:30 ` Bjorn Helgaas
0 siblings, 0 replies; 71+ messages in thread
From: Bjorn Helgaas @ 2019-12-05 22:30 UTC (permalink / raw)
To: Nicolas Saenz Julienne
Cc: linux-pci, Michael Turquette, J. Bruce Fields, linux-nfs,
Edward Cree, linux-clk, f.fainelli, Herbert Xu,
Emilio López, maz, Joerg Roedel, phil, Doug Ledford,
Jason Gunthorpe, Chen-Yu Tsai, Chuck Lever, Martin Habets,
wahrenst, Tom Lendacky, Jiri Pirko, Solarflare linux maintainers,
Maxime Ripard, linux-rpi-kernel, Anna Schumaker, Trond Myklebust,
linux-arm-kernel, Mirko Lindner, Mike Marciniszyn, mbrugger,
Stephen Boyd, netdev, Yishai Hadas, kexec, linux-kernel,
jeremy.linton, David S. Miller, Stephen Hemminger, linux-rdma,
iommu, Moni Shoua, Eric Biederman, james.quinlan, Thomas Graf,
andrew.murray, Robin Murphy, David Woodhouse, Dennis Dalessandro,
Lu Baolu
You got the "n" on "down" in the subject, but still missing "of" ;)
On Tue, Dec 03, 2019 at 12:47:40PM +0100, Nicolas Saenz Julienne wrote:
> Some users need to make sure their rounding function accepts and returns
> 64bit long variables regardless of the architecture. Sadly
> roundup/rounddown_pow_two() takes and returns unsigned longs. It turns
> out ilog2() already handles 32/64bit calculations properly, and being
> the building block to the round functions we can rework them as a
> wrapper around it.
Missing "of" in the function names here.
s/a wrapper/wrappers/
IIUC the point of this is that roundup_pow_of_two() returned
"unsigned long", which can be either 32 or 64 bits (worth pointing
out, I think), and many callers need something that returns
"unsigned long long" (always 64 bits).
It's a nice simplification to remove the "__" variants. Just as a
casual reader of this commit message, I'd like to know why we had both
the roundup and the __roundup versions in the first place, and why we
no longer need both.
> -#define roundup_pow_of_two(n) \
> -( \
> - __builtin_constant_p(n) ? ( \
> - (n == 1) ? 1 : \
> - (1UL << (ilog2((n) - 1) + 1)) \
> - ) : \
> - __roundup_pow_of_two(n) \
> - )
> +#define roundup_pow_of_two(n) \
> +( \
> + (__builtin_constant_p(n) && ((n) == 1)) ? \
> + 1 : (1ULL << (ilog2((n) - 1) + 1)) \
> +)
Should the resulting type of this expression always be a ULL, even
when n==1, i.e., should it be this?
1ULL : (1ULL << (ilog2((n) - 1) + 1)) \
Or maybe there's no case where that makes a difference?
Bjorn
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply [flat|nested] 71+ messages in thread
* Re: [PATCH v4 7/8] linux/log2.h: Fix 64bit calculations in roundup/down_pow_two()
@ 2019-12-05 22:30 ` Bjorn Helgaas
0 siblings, 0 replies; 71+ messages in thread
From: Bjorn Helgaas @ 2019-12-05 22:30 UTC (permalink / raw)
To: Nicolas Saenz Julienne
Cc: linux-pci, Michael Turquette, J. Bruce Fields, linux-nfs,
Edward Cree, linux-clk, f.fainelli, Herbert Xu,
Emilio López, maz, Joerg Roedel, phil, Doug Ledford,
Jason Gunthorpe, Chen-Yu Tsai, Chuck Lever, Martin Habets,
wahrenst, Tom Lendacky, Jiri Pirko, Solarflare linux maintainers,
Maxime Ripard, linux-rpi-kernel, Anna Schumaker, Trond Myklebust,
linux-arm-kernel, Mirko Lindner, Mike Marciniszyn, mbrugger,
Stephen Boyd, netdev, Yishai Hadas, kexec, linux-kernel,
jeremy.linton, David S. Miller, Stephen Hemminger, linux-rdma,
iommu, Moni Shoua, Eric Biederman, james.quinlan, Thomas Graf,
andrew.murray, Robin Murphy, David Woodhouse, Dennis Dalessandro,
Lu Baolu
You got the "n" on "down" in the subject, but still missing "of" ;)
On Tue, Dec 03, 2019 at 12:47:40PM +0100, Nicolas Saenz Julienne wrote:
> Some users need to make sure their rounding function accepts and returns
> 64bit long variables regardless of the architecture. Sadly
> roundup/rounddown_pow_two() takes and returns unsigned longs. It turns
> out ilog2() already handles 32/64bit calculations properly, and being
> the building block to the round functions we can rework them as a
> wrapper around it.
Missing "of" in the function names here.
s/a wrapper/wrappers/
IIUC the point of this is that roundup_pow_of_two() returned
"unsigned long", which can be either 32 or 64 bits (worth pointing
out, I think), and many callers need something that returns
"unsigned long long" (always 64 bits).
It's a nice simplification to remove the "__" variants. Just as a
casual reader of this commit message, I'd like to know why we had both
the roundup and the __roundup versions in the first place, and why we
no longer need both.
> -#define roundup_pow_of_two(n) \
> -( \
> - __builtin_constant_p(n) ? ( \
> - (n == 1) ? 1 : \
> - (1UL << (ilog2((n) - 1) + 1)) \
> - ) : \
> - __roundup_pow_of_two(n) \
> - )
> +#define roundup_pow_of_two(n) \
> +( \
> + (__builtin_constant_p(n) && ((n) == 1)) ? \
> + 1 : (1ULL << (ilog2((n) - 1) + 1)) \
> +)
Should the resulting type of this expression always be a ULL, even
when n==1, i.e., should it be this?
1ULL : (1ULL << (ilog2((n) - 1) + 1)) \
Or maybe there's no case where that makes a difference?
Bjorn
_______________________________________________
kexec mailing list
kexec@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/kexec
^ permalink raw reply [flat|nested] 71+ messages in thread
* Re: [PATCH v4 7/8] linux/log2.h: Fix 64bit calculations in roundup/down_pow_two()
2019-12-05 17:48 ` Robin Murphy
(?)
@ 2019-12-12 12:31 ` Nicolas Saenz Julienne
-1 siblings, 0 replies; 71+ messages in thread
From: Nicolas Saenz Julienne @ 2019-12-12 12:31 UTC (permalink / raw)
To: Robin Murphy, andrew.murray, maz, linux-kernel,
Michael Turquette, Stephen Boyd, Emilio López,
Maxime Ripard, Chen-Yu Tsai, Mike Marciniszyn,
Dennis Dalessandro, Yishai Hadas, Moni Shoua, David Woodhouse,
Lu Baolu, Joerg Roedel, Tom Lendacky, Mirko Lindner,
Stephen Hemminger, Jiri Pirko, Solarflare linux maintainers,
Edward Cree, Martin Habets, Bjorn Helgaas, Eric Biederman,
Thomas Graf, Herbert Xu
Cc: james.quinlan, mbrugger, f.fainelli, phil, wahrenst,
jeremy.linton, linux-pci, linux-rpi-kernel, Robin Murphy,
Doug Ledford, Jason Gunthorpe, David S. Miller, Trond Myklebust,
Anna Schumaker, J. Bruce Fields, Chuck Lever, linux-clk,
linux-arm-kernel, linux-rdma, iommu, netdev, kexec, linux-nfs
[-- Attachment #1: Type: text/plain, Size: 2633 bytes --]
Hi Robin,
On Thu, 2019-12-05 at 17:48 +0000, Robin Murphy wrote:
> On 03/12/2019 11:47 am, Nicolas Saenz Julienne wrote:
> > Some users need to make sure their rounding function accepts and returns
> > 64bit long variables regardless of the architecture. Sadly
> > roundup/rounddown_pow_two() takes and returns unsigned longs. It turns
> > out ilog2() already handles 32/64bit calculations properly, and being
> > the building block to the round functions we can rework them as a
> > wrapper around it.
>
> Neat! Although all the additional ULL casts this introduces seem
> somewhat unwelcome - I suppose the (1ULL << (ilog2(n))) makes it
> effectively always return unsigned long long now. Might it make sense to
> cast the return value to typeof(n) to avoid this slightly non-obvious
> behaviour (and the associated churn)?
It might alleviate some of the churn alright but I don't think a cast is really
going to make the behaviour more obvious. Say your expression is a big mess,
you'll have to analyze it to infer the output type, keeping in mind things like
integer promotion. See this example, 'params->nelem_hint' and
'params->min_size' are u16:
diff --git a/lib/rhashtable.c b/lib/rhashtable.c
index bdb7e4cadf05..70908678c7a8 100644
--- a/lib/rhashtable.c
+++ b/lib/rhashtable.c
@@ -950,7 +950,7 @@ static size_t rounded_hashtable_size(const struct rhashtable_params *params)
if (params->nelem_hint)
retsize = max(roundup_pow_of_two(params->nelem_hint * 4 / 3),
- (unsigned long)params->min_size);
+ (unsigned long long)params->min_size);
else
retsize = max(HASH_DEFAULT_SIZE,
(unsigned long)params->min_size);
With a cast the patch will look like this:
diff --git a/lib/rhashtable.c b/lib/rhashtable.c
index bdb7e4cadf05..70908678c7a8 100644
--- a/lib/rhashtable.c
+++ b/lib/rhashtable.c
@@ -950,7 +950,7 @@ static size_t rounded_hashtable_size(const struct rhashtable_params *params)
if (params->nelem_hint)
retsize = max(roundup_pow_of_two(params->nelem_hint * 4 / 3),
- (unsigned long)params->min_size);
+ (int)params->min_size);
else
retsize = max(HASH_DEFAULT_SIZE,
(unsigned long)params->min_size);
To me it's even less obvious than with a fixed ULL.
My intuition tells me to keep it as similar as the old behaviour, at the
expense of the extra churn (which is not that different from the current status
quo anyway). That said, I'll be happy to change it.
Regards,
Nicolas
[-- Attachment #2: This is a digitally signed message part --]
[-- Type: application/pgp-signature, Size: 488 bytes --]
^ permalink raw reply [flat|nested] 71+ messages in thread
* Re: [PATCH v4 7/8] linux/log2.h: Fix 64bit calculations in roundup/down_pow_two()
@ 2019-12-12 12:31 ` Nicolas Saenz Julienne
0 siblings, 0 replies; 71+ messages in thread
From: Nicolas Saenz Julienne @ 2019-12-12 12:31 UTC (permalink / raw)
To: Robin Murphy, andrew.murray, maz, linux-kernel,
Michael Turquette, Stephen Boyd, Emilio López,
Maxime Ripard, Chen-Yu Tsai, Mike Marciniszyn,
Dennis Dalessandro, Yishai Hadas, Moni Shoua, David Woodhouse,
Lu Baolu, Joerg Roedel, Tom Lendacky, Mirko Lindner,
Stephen Hemminger, Jiri Pirko, Solarflare linux maintainers,
Edward Cree, Martin Habets, Bjorn Helgaas, Eric Biederman,
Thomas Graf, Herbert Xu
Cc: linux-pci, J. Bruce Fields, linux-clk, f.fainelli, linux-rdma,
phil, Jason Gunthorpe, Doug Ledford, linux-rpi-kernel,
Trond Myklebust, linux-arm-kernel, linux-nfs, mbrugger, netdev,
kexec, jeremy.linton, David S. Miller, iommu, Chuck Lever,
wahrenst, james.quinlan, Anna Schumaker, Robin Murphy
[-- Attachment #1.1: Type: text/plain, Size: 2633 bytes --]
Hi Robin,
On Thu, 2019-12-05 at 17:48 +0000, Robin Murphy wrote:
> On 03/12/2019 11:47 am, Nicolas Saenz Julienne wrote:
> > Some users need to make sure their rounding function accepts and returns
> > 64bit long variables regardless of the architecture. Sadly
> > roundup/rounddown_pow_two() takes and returns unsigned longs. It turns
> > out ilog2() already handles 32/64bit calculations properly, and being
> > the building block to the round functions we can rework them as a
> > wrapper around it.
>
> Neat! Although all the additional ULL casts this introduces seem
> somewhat unwelcome - I suppose the (1ULL << (ilog2(n))) makes it
> effectively always return unsigned long long now. Might it make sense to
> cast the return value to typeof(n) to avoid this slightly non-obvious
> behaviour (and the associated churn)?
It might alleviate some of the churn alright but I don't think a cast is really
going to make the behaviour more obvious. Say your expression is a big mess,
you'll have to analyze it to infer the output type, keeping in mind things like
integer promotion. See this example, 'params->nelem_hint' and
'params->min_size' are u16:
diff --git a/lib/rhashtable.c b/lib/rhashtable.c
index bdb7e4cadf05..70908678c7a8 100644
--- a/lib/rhashtable.c
+++ b/lib/rhashtable.c
@@ -950,7 +950,7 @@ static size_t rounded_hashtable_size(const struct rhashtable_params *params)
if (params->nelem_hint)
retsize = max(roundup_pow_of_two(params->nelem_hint * 4 / 3),
- (unsigned long)params->min_size);
+ (unsigned long long)params->min_size);
else
retsize = max(HASH_DEFAULT_SIZE,
(unsigned long)params->min_size);
With a cast the patch will look like this:
diff --git a/lib/rhashtable.c b/lib/rhashtable.c
index bdb7e4cadf05..70908678c7a8 100644
--- a/lib/rhashtable.c
+++ b/lib/rhashtable.c
@@ -950,7 +950,7 @@ static size_t rounded_hashtable_size(const struct rhashtable_params *params)
if (params->nelem_hint)
retsize = max(roundup_pow_of_two(params->nelem_hint * 4 / 3),
- (unsigned long)params->min_size);
+ (int)params->min_size);
else
retsize = max(HASH_DEFAULT_SIZE,
(unsigned long)params->min_size);
To me it's even less obvious than with a fixed ULL.
My intuition tells me to keep it as similar as the old behaviour, at the
expense of the extra churn (which is not that different from the current status
quo anyway). That said, I'll be happy to change it.
Regards,
Nicolas
[-- Attachment #1.2: This is a digitally signed message part --]
[-- Type: application/pgp-signature, Size: 488 bytes --]
[-- Attachment #2: Type: text/plain, Size: 156 bytes --]
_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu
^ permalink raw reply [flat|nested] 71+ messages in thread
* Re: [PATCH v4 7/8] linux/log2.h: Fix 64bit calculations in roundup/down_pow_two()
@ 2019-12-12 12:31 ` Nicolas Saenz Julienne
0 siblings, 0 replies; 71+ messages in thread
From: Nicolas Saenz Julienne @ 2019-12-12 12:31 UTC (permalink / raw)
To: Robin Murphy, andrew.murray, maz, linux-kernel,
Michael Turquette, Stephen Boyd, Emilio López,
Maxime Ripard, Chen-Yu Tsai, Mike Marciniszyn,
Dennis Dalessandro, Yishai Hadas, Moni Shoua, David Woodhouse,
Lu Baolu, Joerg Roedel, Tom Lendacky, Mirko Lindner,
Stephen Hemminger, Jiri Pirko, Solarflare linux maintainers,
Edward Cree, Martin Habets, Bjorn Helgaas, Eric Biederman,
Thomas Graf, Herbert Xu
Cc: linux-pci, J. Bruce Fields, linux-clk, f.fainelli, linux-rdma,
phil, Jason Gunthorpe, Doug Ledford, linux-rpi-kernel,
Trond Myklebust, linux-arm-kernel, linux-nfs, mbrugger, netdev,
kexec, jeremy.linton, David S. Miller, iommu, Chuck Lever,
wahrenst, james.quinlan, Anna Schumaker, Robin Murphy
[-- Attachment #1.1: Type: text/plain, Size: 2633 bytes --]
Hi Robin,
On Thu, 2019-12-05 at 17:48 +0000, Robin Murphy wrote:
> On 03/12/2019 11:47 am, Nicolas Saenz Julienne wrote:
> > Some users need to make sure their rounding function accepts and returns
> > 64bit long variables regardless of the architecture. Sadly
> > roundup/rounddown_pow_two() takes and returns unsigned longs. It turns
> > out ilog2() already handles 32/64bit calculations properly, and being
> > the building block to the round functions we can rework them as a
> > wrapper around it.
>
> Neat! Although all the additional ULL casts this introduces seem
> somewhat unwelcome - I suppose the (1ULL << (ilog2(n))) makes it
> effectively always return unsigned long long now. Might it make sense to
> cast the return value to typeof(n) to avoid this slightly non-obvious
> behaviour (and the associated churn)?
It might alleviate some of the churn alright but I don't think a cast is really
going to make the behaviour more obvious. Say your expression is a big mess,
you'll have to analyze it to infer the output type, keeping in mind things like
integer promotion. See this example, 'params->nelem_hint' and
'params->min_size' are u16:
diff --git a/lib/rhashtable.c b/lib/rhashtable.c
index bdb7e4cadf05..70908678c7a8 100644
--- a/lib/rhashtable.c
+++ b/lib/rhashtable.c
@@ -950,7 +950,7 @@ static size_t rounded_hashtable_size(const struct rhashtable_params *params)
if (params->nelem_hint)
retsize = max(roundup_pow_of_two(params->nelem_hint * 4 / 3),
- (unsigned long)params->min_size);
+ (unsigned long long)params->min_size);
else
retsize = max(HASH_DEFAULT_SIZE,
(unsigned long)params->min_size);
With a cast the patch will look like this:
diff --git a/lib/rhashtable.c b/lib/rhashtable.c
index bdb7e4cadf05..70908678c7a8 100644
--- a/lib/rhashtable.c
+++ b/lib/rhashtable.c
@@ -950,7 +950,7 @@ static size_t rounded_hashtable_size(const struct rhashtable_params *params)
if (params->nelem_hint)
retsize = max(roundup_pow_of_two(params->nelem_hint * 4 / 3),
- (unsigned long)params->min_size);
+ (int)params->min_size);
else
retsize = max(HASH_DEFAULT_SIZE,
(unsigned long)params->min_size);
To me it's even less obvious than with a fixed ULL.
My intuition tells me to keep it as similar as the old behaviour, at the
expense of the extra churn (which is not that different from the current status
quo anyway). That said, I'll be happy to change it.
Regards,
Nicolas
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_______________________________________________
kexec mailing list
kexec@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/kexec
^ permalink raw reply [flat|nested] 71+ messages in thread
* Re: [PATCH v4 7/8] linux/log2.h: Fix 64bit calculations in roundup/down_pow_two()
2019-12-05 22:30 ` Bjorn Helgaas
(?)
(?)
@ 2019-12-12 13:16 ` Nicolas Saenz Julienne
-1 siblings, 0 replies; 71+ messages in thread
From: Nicolas Saenz Julienne @ 2019-12-12 13:16 UTC (permalink / raw)
To: Bjorn Helgaas
Cc: andrew.murray, maz, linux-kernel, Michael Turquette,
Stephen Boyd, Emilio López, Maxime Ripard, Chen-Yu Tsai,
Mike Marciniszyn, Dennis Dalessandro, Yishai Hadas, Moni Shoua,
David Woodhouse, Lu Baolu, Joerg Roedel, Tom Lendacky,
Mirko Lindner, Stephen Hemminger, Jiri Pirko,
Solarflare linux maintainers, Edward Cree, Martin Habets,
Eric Biederman, Thomas Graf, Herbert Xu, james.quinlan, mbrugger,
f.fainelli, phil, wahrenst, jeremy.linton, linux-pci,
linux-rpi-kernel, Robin Murphy, Doug Ledford, Jason Gunthorpe,
David S. Miller, Trond Myklebust, Anna Schumaker,
J. Bruce Fields, Chuck Lever, linux-clk, linux-arm-kernel,
linux-rdma, iommu, netdev, kexec, linux-nfs
[-- Attachment #1: Type: text/plain, Size: 2374 bytes --]
On Thu, 2019-12-05 at 16:30 -0600, Bjorn Helgaas wrote:
> You got the "n" on "down" in the subject, but still missing "of" ;)
Yes, sorry about that, I tend to re-read what I meant to say instead of what
it's actually written.
> On Tue, Dec 03, 2019 at 12:47:40PM +0100, Nicolas Saenz Julienne wrote:
> > Some users need to make sure their rounding function accepts and returns
> > 64bit long variables regardless of the architecture. Sadly
> > roundup/rounddown_pow_two() takes and returns unsigned longs. It turns
> > out ilog2() already handles 32/64bit calculations properly, and being
> > the building block to the round functions we can rework them as a
> > wrapper around it.
>
> Missing "of" in the function names here.
> s/a wrapper/wrappers/
Noted
> IIUC the point of this is that roundup_pow_of_two() returned
> "unsigned long", which can be either 32 or 64 bits (worth pointing
> out, I think), and many callers need something that returns
> "unsigned long long" (always 64 bits).
I'll update the commit message to be a more explicit.
> It's a nice simplification to remove the "__" variants. Just as a
> casual reader of this commit message, I'd like to know why we had both
> the roundup and the __roundup versions in the first place, and why we
> no longer need both.
So, the commit that introduced it (312a0c170945b) meant to use the '__' variant
as a helper, but, due to the fact this is a header file, some found it and made
use of it. I went over some if the commits introducing '__' usages and none of
them seem to acknowledge its use as opposed to the macro version. I think it's
fair to say it's a case of cargo-culting.
> > -#define roundup_pow_of_two(n) \
> > -( \
> > - __builtin_constant_p(n) ? ( \
> > - (n == 1) ? 1 : \
> > - (1UL << (ilog2((n) - 1) + 1)) \
> > - ) : \
> > - __roundup_pow_of_two(n) \
> > - )
> > +#define roundup_pow_of_two(n) \
> > +( \
> > + (__builtin_constant_p(n) && ((n) == 1)) ? \
> > + 1 : (1ULL << (ilog2((n) - 1) + 1)) \
> > +)
>
> Should the resulting type of this expression always be a ULL, even
> when n==1, i.e., should it be this?
>
> 1ULL : (1ULL << (ilog2((n) - 1) + 1)) \
>
> Or maybe there's no case where that makes a difference?
It should be 1ULL on either case.
Regards,
Nicolas
[-- Attachment #2: This is a digitally signed message part --]
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^ permalink raw reply [flat|nested] 71+ messages in thread
* Re: [PATCH v4 7/8] linux/log2.h: Fix 64bit calculations in roundup/down_pow_two()
@ 2019-12-12 13:16 ` Nicolas Saenz Julienne
0 siblings, 0 replies; 71+ messages in thread
From: Nicolas Saenz Julienne @ 2019-12-12 13:16 UTC (permalink / raw)
To: Bjorn Helgaas
Cc: linux-pci, Michael Turquette, J. Bruce Fields, linux-nfs,
Edward Cree, linux-clk, f.fainelli, Herbert Xu,
Emilio López, maz, phil, Doug Ledford, Jason Gunthorpe,
Chen-Yu Tsai, Chuck Lever, Martin Habets, wahrenst, Tom Lendacky,
Jiri Pirko, Solarflare linux maintainers, Maxime Ripard,
linux-rpi-kernel, Anna Schumaker, Trond Myklebust,
linux-arm-kernel, Mirko Lindner, Mike Marciniszyn, mbrugger,
Stephen Boyd, netdev, Yishai Hadas, kexec, linux-kernel,
jeremy.linton, David S. Miller, Stephen Hemminger, linux-rdma,
iommu, Moni Shoua, Eric Biederman, james.quinlan, Thomas Graf,
Robin Murphy, David Woodhouse, Dennis Dalessandro
[-- Attachment #1.1: Type: text/plain, Size: 2374 bytes --]
On Thu, 2019-12-05 at 16:30 -0600, Bjorn Helgaas wrote:
> You got the "n" on "down" in the subject, but still missing "of" ;)
Yes, sorry about that, I tend to re-read what I meant to say instead of what
it's actually written.
> On Tue, Dec 03, 2019 at 12:47:40PM +0100, Nicolas Saenz Julienne wrote:
> > Some users need to make sure their rounding function accepts and returns
> > 64bit long variables regardless of the architecture. Sadly
> > roundup/rounddown_pow_two() takes and returns unsigned longs. It turns
> > out ilog2() already handles 32/64bit calculations properly, and being
> > the building block to the round functions we can rework them as a
> > wrapper around it.
>
> Missing "of" in the function names here.
> s/a wrapper/wrappers/
Noted
> IIUC the point of this is that roundup_pow_of_two() returned
> "unsigned long", which can be either 32 or 64 bits (worth pointing
> out, I think), and many callers need something that returns
> "unsigned long long" (always 64 bits).
I'll update the commit message to be a more explicit.
> It's a nice simplification to remove the "__" variants. Just as a
> casual reader of this commit message, I'd like to know why we had both
> the roundup and the __roundup versions in the first place, and why we
> no longer need both.
So, the commit that introduced it (312a0c170945b) meant to use the '__' variant
as a helper, but, due to the fact this is a header file, some found it and made
use of it. I went over some if the commits introducing '__' usages and none of
them seem to acknowledge its use as opposed to the macro version. I think it's
fair to say it's a case of cargo-culting.
> > -#define roundup_pow_of_two(n) \
> > -( \
> > - __builtin_constant_p(n) ? ( \
> > - (n == 1) ? 1 : \
> > - (1UL << (ilog2((n) - 1) + 1)) \
> > - ) : \
> > - __roundup_pow_of_two(n) \
> > - )
> > +#define roundup_pow_of_two(n) \
> > +( \
> > + (__builtin_constant_p(n) && ((n) == 1)) ? \
> > + 1 : (1ULL << (ilog2((n) - 1) + 1)) \
> > +)
>
> Should the resulting type of this expression always be a ULL, even
> when n==1, i.e., should it be this?
>
> 1ULL : (1ULL << (ilog2((n) - 1) + 1)) \
>
> Or maybe there's no case where that makes a difference?
It should be 1ULL on either case.
Regards,
Nicolas
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[-- Type: application/pgp-signature, Size: 488 bytes --]
[-- Attachment #2: Type: text/plain, Size: 156 bytes --]
_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu
^ permalink raw reply [flat|nested] 71+ messages in thread
* Re: [PATCH v4 7/8] linux/log2.h: Fix 64bit calculations in roundup/down_pow_two()
@ 2019-12-12 13:16 ` Nicolas Saenz Julienne
0 siblings, 0 replies; 71+ messages in thread
From: Nicolas Saenz Julienne @ 2019-12-12 13:16 UTC (permalink / raw)
To: Bjorn Helgaas
Cc: linux-pci, Michael Turquette, J. Bruce Fields, linux-nfs,
Edward Cree, linux-clk, f.fainelli, Herbert Xu,
Emilio López, maz, Joerg Roedel, phil, Doug Ledford,
Jason Gunthorpe, Chen-Yu Tsai, Chuck Lever, Martin Habets,
wahrenst, Tom Lendacky, Jiri Pirko, Solarflare linux maintainers,
Maxime Ripard, linux-rpi-kernel, Anna Schumaker, Trond Myklebust,
linux-arm-kernel, Mirko Lindner, Mike Marciniszyn, mbrugger,
Stephen Boyd, netdev, Yishai Hadas, kexec, linux-kernel,
jeremy.linton, David S. Miller, Stephen Hemminger, linux-rdma,
iommu, Moni Shoua, Eric Biederman, james.quinlan, Thomas Graf,
andrew.murray, Robin Murphy, David Woodhouse, Dennis Dalessandro,
Lu Baolu
[-- Attachment #1.1: Type: text/plain, Size: 2374 bytes --]
On Thu, 2019-12-05 at 16:30 -0600, Bjorn Helgaas wrote:
> You got the "n" on "down" in the subject, but still missing "of" ;)
Yes, sorry about that, I tend to re-read what I meant to say instead of what
it's actually written.
> On Tue, Dec 03, 2019 at 12:47:40PM +0100, Nicolas Saenz Julienne wrote:
> > Some users need to make sure their rounding function accepts and returns
> > 64bit long variables regardless of the architecture. Sadly
> > roundup/rounddown_pow_two() takes and returns unsigned longs. It turns
> > out ilog2() already handles 32/64bit calculations properly, and being
> > the building block to the round functions we can rework them as a
> > wrapper around it.
>
> Missing "of" in the function names here.
> s/a wrapper/wrappers/
Noted
> IIUC the point of this is that roundup_pow_of_two() returned
> "unsigned long", which can be either 32 or 64 bits (worth pointing
> out, I think), and many callers need something that returns
> "unsigned long long" (always 64 bits).
I'll update the commit message to be a more explicit.
> It's a nice simplification to remove the "__" variants. Just as a
> casual reader of this commit message, I'd like to know why we had both
> the roundup and the __roundup versions in the first place, and why we
> no longer need both.
So, the commit that introduced it (312a0c170945b) meant to use the '__' variant
as a helper, but, due to the fact this is a header file, some found it and made
use of it. I went over some if the commits introducing '__' usages and none of
them seem to acknowledge its use as opposed to the macro version. I think it's
fair to say it's a case of cargo-culting.
> > -#define roundup_pow_of_two(n) \
> > -( \
> > - __builtin_constant_p(n) ? ( \
> > - (n == 1) ? 1 : \
> > - (1UL << (ilog2((n) - 1) + 1)) \
> > - ) : \
> > - __roundup_pow_of_two(n) \
> > - )
> > +#define roundup_pow_of_two(n) \
> > +( \
> > + (__builtin_constant_p(n) && ((n) == 1)) ? \
> > + 1 : (1ULL << (ilog2((n) - 1) + 1)) \
> > +)
>
> Should the resulting type of this expression always be a ULL, even
> when n==1, i.e., should it be this?
>
> 1ULL : (1ULL << (ilog2((n) - 1) + 1)) \
>
> Or maybe there's no case where that makes a difference?
It should be 1ULL on either case.
Regards,
Nicolas
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[-- Type: application/pgp-signature, Size: 488 bytes --]
[-- Attachment #2: Type: text/plain, Size: 176 bytes --]
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply [flat|nested] 71+ messages in thread
* Re: [PATCH v4 7/8] linux/log2.h: Fix 64bit calculations in roundup/down_pow_two()
@ 2019-12-12 13:16 ` Nicolas Saenz Julienne
0 siblings, 0 replies; 71+ messages in thread
From: Nicolas Saenz Julienne @ 2019-12-12 13:16 UTC (permalink / raw)
To: Bjorn Helgaas
Cc: linux-pci, Michael Turquette, J. Bruce Fields, linux-nfs,
Edward Cree, linux-clk, f.fainelli, Herbert Xu,
Emilio López, maz, Joerg Roedel, phil, Doug Ledford,
Jason Gunthorpe, Chen-Yu Tsai, Chuck Lever, Martin Habets,
wahrenst, Tom Lendacky, Jiri Pirko, Solarflare linux maintainers,
Maxime Ripard, linux-rpi-kernel, Anna Schumaker, Trond Myklebust,
linux-arm-kernel, Mirko Lindner, Mike Marciniszyn, mbrugger,
Stephen Boyd, netdev, Yishai Hadas, kexec, linux-kernel,
jeremy.linton, David S. Miller, Stephen Hemminger, linux-rdma,
iommu, Moni Shoua, Eric Biederman, james.quinlan, Thomas Graf,
andrew.murray, Robin Murphy, David Woodhouse, Dennis Dalessandro,
Lu Baolu
[-- Attachment #1.1: Type: text/plain, Size: 2374 bytes --]
On Thu, 2019-12-05 at 16:30 -0600, Bjorn Helgaas wrote:
> You got the "n" on "down" in the subject, but still missing "of" ;)
Yes, sorry about that, I tend to re-read what I meant to say instead of what
it's actually written.
> On Tue, Dec 03, 2019 at 12:47:40PM +0100, Nicolas Saenz Julienne wrote:
> > Some users need to make sure their rounding function accepts and returns
> > 64bit long variables regardless of the architecture. Sadly
> > roundup/rounddown_pow_two() takes and returns unsigned longs. It turns
> > out ilog2() already handles 32/64bit calculations properly, and being
> > the building block to the round functions we can rework them as a
> > wrapper around it.
>
> Missing "of" in the function names here.
> s/a wrapper/wrappers/
Noted
> IIUC the point of this is that roundup_pow_of_two() returned
> "unsigned long", which can be either 32 or 64 bits (worth pointing
> out, I think), and many callers need something that returns
> "unsigned long long" (always 64 bits).
I'll update the commit message to be a more explicit.
> It's a nice simplification to remove the "__" variants. Just as a
> casual reader of this commit message, I'd like to know why we had both
> the roundup and the __roundup versions in the first place, and why we
> no longer need both.
So, the commit that introduced it (312a0c170945b) meant to use the '__' variant
as a helper, but, due to the fact this is a header file, some found it and made
use of it. I went over some if the commits introducing '__' usages and none of
them seem to acknowledge its use as opposed to the macro version. I think it's
fair to say it's a case of cargo-culting.
> > -#define roundup_pow_of_two(n) \
> > -( \
> > - __builtin_constant_p(n) ? ( \
> > - (n == 1) ? 1 : \
> > - (1UL << (ilog2((n) - 1) + 1)) \
> > - ) : \
> > - __roundup_pow_of_two(n) \
> > - )
> > +#define roundup_pow_of_two(n) \
> > +( \
> > + (__builtin_constant_p(n) && ((n) == 1)) ? \
> > + 1 : (1ULL << (ilog2((n) - 1) + 1)) \
> > +)
>
> Should the resulting type of this expression always be a ULL, even
> when n==1, i.e., should it be this?
>
> 1ULL : (1ULL << (ilog2((n) - 1) + 1)) \
>
> Or maybe there's no case where that makes a difference?
It should be 1ULL on either case.
Regards,
Nicolas
[-- Attachment #1.2: This is a digitally signed message part --]
[-- Type: application/pgp-signature, Size: 488 bytes --]
[-- Attachment #2: Type: text/plain, Size: 143 bytes --]
_______________________________________________
kexec mailing list
kexec@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/kexec
^ permalink raw reply [flat|nested] 71+ messages in thread
* Re: [PATCH v4 8/8] linux/log2.h: Use roundup/dow_pow_two() on 64bit calculations
2019-12-05 20:38 ` Bjorn Helgaas
(?)
(?)
@ 2019-12-12 13:21 ` Nicolas Saenz Julienne
-1 siblings, 0 replies; 71+ messages in thread
From: Nicolas Saenz Julienne @ 2019-12-12 13:21 UTC (permalink / raw)
To: Bjorn Helgaas
Cc: andrew.murray, maz, linux-kernel, Lorenzo Pieralisi, Hanjun Guo,
Sudeep Holla, Tariq Toukan, Rob Herring, Frank Rowand,
Florian Fainelli, bcm-kernel-feedback-list, Eric Anholt,
Stefan Wahren, Shawn Lin, Heiko Stuebner, Christoph Hellwig,
Marek Szyprowski, Robin Murphy, james.quinlan, mbrugger, phil,
jeremy.linton, linux-pci, linux-rpi-kernel, Rafael J. Wysocki,
Len Brown, David S. Miller, linux-acpi, linux-arm-kernel, netdev,
linux-rdma, devicetree, linux-rockchip, iommu
[-- Attachment #1: Type: text/plain, Size: 2721 bytes --]
On Thu, 2019-12-05 at 14:38 -0600, Bjorn Helgaas wrote:
> The subject contains a couple typos: it's missing "of" and it's
> missing the "n" on "down".
Noted >
> On Tue, Dec 03, 2019 at 12:47:41PM +0100, Nicolas Saenz Julienne wrote:
> > The function now is safe to use while expecting a 64bit value. Use it
> > where relevant.
>
> Please include the function names ("roundup_pow_of_two()",
> "rounddown_pow_of_two()") in the changelog so it is self-contained and
> doesn't depend on the subject.
Noted
> > Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
>
> With the nits above and below addressed,
>
> Acked-by: Bjorn Helgaas <bhelgaas@google.com> # drivers/pci
Thanks!
> > ---
> > drivers/acpi/arm64/iort.c | 2 +-
> > drivers/net/ethernet/mellanox/mlx4/en_clock.c | 3 ++-
> > drivers/of/device.c | 3 ++-
> > drivers/pci/controller/cadence/pcie-cadence-ep.c | 3 ++-
> > drivers/pci/controller/cadence/pcie-cadence.c | 3 ++-
> > drivers/pci/controller/pcie-brcmstb.c | 3 ++-
> > drivers/pci/controller/pcie-rockchip-ep.c | 5 +++--
> > kernel/dma/direct.c | 2 +-
> > 8 files changed, 15 insertions(+), 9 deletions(-)
> > --- a/drivers/pci/controller/cadence/pcie-cadence-ep.c
> > +++ b/drivers/pci/controller/cadence/pcie-cadence-ep.c
> > @@ -10,6 +10,7 @@
> > #include <linux/platform_device.h>
> > #include <linux/pm_runtime.h>
> > #include <linux/sizes.h>
> > +#include <linux/log2.h>
> >
> > #include "pcie-cadence.h"
> >
> > @@ -65,7 +66,7 @@ static int cdns_pcie_ep_set_bar(struct pci_epc *epc, u8
> > fn,
> > * roundup_pow_of_two() returns an unsigned long, which is not suited
> > * for 64bit values.
> > */
>
> Please remove the comment above since it no longer applies.
Noted
[...]
> > diff --git a/kernel/dma/direct.c b/kernel/dma/direct.c
> > index 6af7ae83c4ad..056886c4efec 100644
> > --- a/kernel/dma/direct.c
> > +++ b/kernel/dma/direct.c
> > @@ -53,7 +53,7 @@ u64 dma_direct_get_required_mask(struct device *dev)
> > {
> > u64 max_dma = phys_to_dma_direct(dev, (max_pfn - 1) << PAGE_SHIFT);
> >
> > - return (1ULL << (fls64(max_dma) - 1)) * 2 - 1;
> > + return rounddown_pow_of_two(max_dma) * 2 - 1;
>
> Personally I would probably make this one a separate patch since it's
> qualitatively different than the others and it would avoid the slight
> awkwardness of the non-greppable "roundup/down_pow_of_two()"
> construction in the commit subject.
>
> But it's fine either way.
I'll split it into two parts, as RobH made a similar complaint.
Regards,
Nicolas
[-- Attachment #2: This is a digitally signed message part --]
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^ permalink raw reply [flat|nested] 71+ messages in thread
* Re: [PATCH v4 8/8] linux/log2.h: Use roundup/dow_pow_two() on 64bit calculations
@ 2019-12-12 13:21 ` Nicolas Saenz Julienne
0 siblings, 0 replies; 71+ messages in thread
From: Nicolas Saenz Julienne @ 2019-12-12 13:21 UTC (permalink / raw)
To: Bjorn Helgaas
Cc: andrew.murray, maz, linux-kernel, Lorenzo Pieralisi, Hanjun Guo,
Sudeep Holla, Tariq Toukan, Rob Herring, Frank Rowand,
Florian Fainelli, bcm-kernel-feedback-list, Eric Anholt,
Stefan Wahren, Shawn Lin, Heiko Stuebner, Christoph Hellwig,
Marek Szyprowski, Robin Murphy, james.quinlan, mbrugger, phil,
jeremy.linton, linux-pci
[-- Attachment #1: Type: text/plain, Size: 2721 bytes --]
On Thu, 2019-12-05 at 14:38 -0600, Bjorn Helgaas wrote:
> The subject contains a couple typos: it's missing "of" and it's
> missing the "n" on "down".
Noted >
> On Tue, Dec 03, 2019 at 12:47:41PM +0100, Nicolas Saenz Julienne wrote:
> > The function now is safe to use while expecting a 64bit value. Use it
> > where relevant.
>
> Please include the function names ("roundup_pow_of_two()",
> "rounddown_pow_of_two()") in the changelog so it is self-contained and
> doesn't depend on the subject.
Noted
> > Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
>
> With the nits above and below addressed,
>
> Acked-by: Bjorn Helgaas <bhelgaas@google.com> # drivers/pci
Thanks!
> > ---
> > drivers/acpi/arm64/iort.c | 2 +-
> > drivers/net/ethernet/mellanox/mlx4/en_clock.c | 3 ++-
> > drivers/of/device.c | 3 ++-
> > drivers/pci/controller/cadence/pcie-cadence-ep.c | 3 ++-
> > drivers/pci/controller/cadence/pcie-cadence.c | 3 ++-
> > drivers/pci/controller/pcie-brcmstb.c | 3 ++-
> > drivers/pci/controller/pcie-rockchip-ep.c | 5 +++--
> > kernel/dma/direct.c | 2 +-
> > 8 files changed, 15 insertions(+), 9 deletions(-)
> > --- a/drivers/pci/controller/cadence/pcie-cadence-ep.c
> > +++ b/drivers/pci/controller/cadence/pcie-cadence-ep.c
> > @@ -10,6 +10,7 @@
> > #include <linux/platform_device.h>
> > #include <linux/pm_runtime.h>
> > #include <linux/sizes.h>
> > +#include <linux/log2.h>
> >
> > #include "pcie-cadence.h"
> >
> > @@ -65,7 +66,7 @@ static int cdns_pcie_ep_set_bar(struct pci_epc *epc, u8
> > fn,
> > * roundup_pow_of_two() returns an unsigned long, which is not suited
> > * for 64bit values.
> > */
>
> Please remove the comment above since it no longer applies.
Noted
[...]
> > diff --git a/kernel/dma/direct.c b/kernel/dma/direct.c
> > index 6af7ae83c4ad..056886c4efec 100644
> > --- a/kernel/dma/direct.c
> > +++ b/kernel/dma/direct.c
> > @@ -53,7 +53,7 @@ u64 dma_direct_get_required_mask(struct device *dev)
> > {
> > u64 max_dma = phys_to_dma_direct(dev, (max_pfn - 1) << PAGE_SHIFT);
> >
> > - return (1ULL << (fls64(max_dma) - 1)) * 2 - 1;
> > + return rounddown_pow_of_two(max_dma) * 2 - 1;
>
> Personally I would probably make this one a separate patch since it's
> qualitatively different than the others and it would avoid the slight
> awkwardness of the non-greppable "roundup/down_pow_of_two()"
> construction in the commit subject.
>
> But it's fine either way.
I'll split it into two parts, as RobH made a similar complaint.
Regards,
Nicolas
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^ permalink raw reply [flat|nested] 71+ messages in thread
* Re: [PATCH v4 8/8] linux/log2.h: Use roundup/dow_pow_two() on 64bit calculations
@ 2019-12-12 13:21 ` Nicolas Saenz Julienne
0 siblings, 0 replies; 71+ messages in thread
From: Nicolas Saenz Julienne @ 2019-12-12 13:21 UTC (permalink / raw)
To: Bjorn Helgaas
Cc: Heiko Stuebner, linux-pci, Shawn Lin, Eric Anholt, Hanjun Guo,
Frank Rowand, Christoph Hellwig, Florian Fainelli,
linux-rockchip, linux-rdma, maz, phil, linux-acpi,
bcm-kernel-feedback-list, Len Brown, devicetree,
linux-rpi-kernel, linux-arm-kernel, mbrugger, netdev,
Rafael J. Wysocki, linux-kernel, jeremy.linton, iommu,
Rob Herring, Stefan Wahren, james.quinlan, Sudeep Holla,
Robin Murphy, David S. Miller, Tariq Toukan
[-- Attachment #1.1: Type: text/plain, Size: 2721 bytes --]
On Thu, 2019-12-05 at 14:38 -0600, Bjorn Helgaas wrote:
> The subject contains a couple typos: it's missing "of" and it's
> missing the "n" on "down".
Noted >
> On Tue, Dec 03, 2019 at 12:47:41PM +0100, Nicolas Saenz Julienne wrote:
> > The function now is safe to use while expecting a 64bit value. Use it
> > where relevant.
>
> Please include the function names ("roundup_pow_of_two()",
> "rounddown_pow_of_two()") in the changelog so it is self-contained and
> doesn't depend on the subject.
Noted
> > Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
>
> With the nits above and below addressed,
>
> Acked-by: Bjorn Helgaas <bhelgaas@google.com> # drivers/pci
Thanks!
> > ---
> > drivers/acpi/arm64/iort.c | 2 +-
> > drivers/net/ethernet/mellanox/mlx4/en_clock.c | 3 ++-
> > drivers/of/device.c | 3 ++-
> > drivers/pci/controller/cadence/pcie-cadence-ep.c | 3 ++-
> > drivers/pci/controller/cadence/pcie-cadence.c | 3 ++-
> > drivers/pci/controller/pcie-brcmstb.c | 3 ++-
> > drivers/pci/controller/pcie-rockchip-ep.c | 5 +++--
> > kernel/dma/direct.c | 2 +-
> > 8 files changed, 15 insertions(+), 9 deletions(-)
> > --- a/drivers/pci/controller/cadence/pcie-cadence-ep.c
> > +++ b/drivers/pci/controller/cadence/pcie-cadence-ep.c
> > @@ -10,6 +10,7 @@
> > #include <linux/platform_device.h>
> > #include <linux/pm_runtime.h>
> > #include <linux/sizes.h>
> > +#include <linux/log2.h>
> >
> > #include "pcie-cadence.h"
> >
> > @@ -65,7 +66,7 @@ static int cdns_pcie_ep_set_bar(struct pci_epc *epc, u8
> > fn,
> > * roundup_pow_of_two() returns an unsigned long, which is not suited
> > * for 64bit values.
> > */
>
> Please remove the comment above since it no longer applies.
Noted
[...]
> > diff --git a/kernel/dma/direct.c b/kernel/dma/direct.c
> > index 6af7ae83c4ad..056886c4efec 100644
> > --- a/kernel/dma/direct.c
> > +++ b/kernel/dma/direct.c
> > @@ -53,7 +53,7 @@ u64 dma_direct_get_required_mask(struct device *dev)
> > {
> > u64 max_dma = phys_to_dma_direct(dev, (max_pfn - 1) << PAGE_SHIFT);
> >
> > - return (1ULL << (fls64(max_dma) - 1)) * 2 - 1;
> > + return rounddown_pow_of_two(max_dma) * 2 - 1;
>
> Personally I would probably make this one a separate patch since it's
> qualitatively different than the others and it would avoid the slight
> awkwardness of the non-greppable "roundup/down_pow_of_two()"
> construction in the commit subject.
>
> But it's fine either way.
I'll split it into two parts, as RobH made a similar complaint.
Regards,
Nicolas
[-- Attachment #1.2: This is a digitally signed message part --]
[-- Type: application/pgp-signature, Size: 488 bytes --]
[-- Attachment #2: Type: text/plain, Size: 156 bytes --]
_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu
^ permalink raw reply [flat|nested] 71+ messages in thread
* Re: [PATCH v4 8/8] linux/log2.h: Use roundup/dow_pow_two() on 64bit calculations
@ 2019-12-12 13:21 ` Nicolas Saenz Julienne
0 siblings, 0 replies; 71+ messages in thread
From: Nicolas Saenz Julienne @ 2019-12-12 13:21 UTC (permalink / raw)
To: Bjorn Helgaas
Cc: Heiko Stuebner, linux-pci, Shawn Lin, Eric Anholt, Hanjun Guo,
Frank Rowand, Christoph Hellwig, Marek Szyprowski,
Florian Fainelli, linux-rockchip, linux-rdma, maz, phil,
linux-acpi, bcm-kernel-feedback-list, Len Brown, devicetree,
Lorenzo Pieralisi, linux-rpi-kernel, linux-arm-kernel, mbrugger,
netdev, Rafael J. Wysocki, linux-kernel, jeremy.linton, iommu,
Rob Herring, Stefan Wahren, james.quinlan, Sudeep Holla,
andrew.murray, Robin Murphy, David S. Miller, Tariq Toukan
[-- Attachment #1.1: Type: text/plain, Size: 2721 bytes --]
On Thu, 2019-12-05 at 14:38 -0600, Bjorn Helgaas wrote:
> The subject contains a couple typos: it's missing "of" and it's
> missing the "n" on "down".
Noted >
> On Tue, Dec 03, 2019 at 12:47:41PM +0100, Nicolas Saenz Julienne wrote:
> > The function now is safe to use while expecting a 64bit value. Use it
> > where relevant.
>
> Please include the function names ("roundup_pow_of_two()",
> "rounddown_pow_of_two()") in the changelog so it is self-contained and
> doesn't depend on the subject.
Noted
> > Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
>
> With the nits above and below addressed,
>
> Acked-by: Bjorn Helgaas <bhelgaas@google.com> # drivers/pci
Thanks!
> > ---
> > drivers/acpi/arm64/iort.c | 2 +-
> > drivers/net/ethernet/mellanox/mlx4/en_clock.c | 3 ++-
> > drivers/of/device.c | 3 ++-
> > drivers/pci/controller/cadence/pcie-cadence-ep.c | 3 ++-
> > drivers/pci/controller/cadence/pcie-cadence.c | 3 ++-
> > drivers/pci/controller/pcie-brcmstb.c | 3 ++-
> > drivers/pci/controller/pcie-rockchip-ep.c | 5 +++--
> > kernel/dma/direct.c | 2 +-
> > 8 files changed, 15 insertions(+), 9 deletions(-)
> > --- a/drivers/pci/controller/cadence/pcie-cadence-ep.c
> > +++ b/drivers/pci/controller/cadence/pcie-cadence-ep.c
> > @@ -10,6 +10,7 @@
> > #include <linux/platform_device.h>
> > #include <linux/pm_runtime.h>
> > #include <linux/sizes.h>
> > +#include <linux/log2.h>
> >
> > #include "pcie-cadence.h"
> >
> > @@ -65,7 +66,7 @@ static int cdns_pcie_ep_set_bar(struct pci_epc *epc, u8
> > fn,
> > * roundup_pow_of_two() returns an unsigned long, which is not suited
> > * for 64bit values.
> > */
>
> Please remove the comment above since it no longer applies.
Noted
[...]
> > diff --git a/kernel/dma/direct.c b/kernel/dma/direct.c
> > index 6af7ae83c4ad..056886c4efec 100644
> > --- a/kernel/dma/direct.c
> > +++ b/kernel/dma/direct.c
> > @@ -53,7 +53,7 @@ u64 dma_direct_get_required_mask(struct device *dev)
> > {
> > u64 max_dma = phys_to_dma_direct(dev, (max_pfn - 1) << PAGE_SHIFT);
> >
> > - return (1ULL << (fls64(max_dma) - 1)) * 2 - 1;
> > + return rounddown_pow_of_two(max_dma) * 2 - 1;
>
> Personally I would probably make this one a separate patch since it's
> qualitatively different than the others and it would avoid the slight
> awkwardness of the non-greppable "roundup/down_pow_of_two()"
> construction in the commit subject.
>
> But it's fine either way.
I'll split it into two parts, as RobH made a similar complaint.
Regards,
Nicolas
[-- Attachment #1.2: This is a digitally signed message part --]
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[-- Attachment #2: Type: text/plain, Size: 176 bytes --]
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply [flat|nested] 71+ messages in thread
* Re: [PATCH v4 2/8] ARM: dts: bcm2711: Enable PCIe controller
2019-12-03 11:47 ` Nicolas Saenz Julienne
@ 2019-12-16 6:46 ` Jian-Hong Pan
-1 siblings, 0 replies; 71+ messages in thread
From: Jian-Hong Pan @ 2019-12-16 6:46 UTC (permalink / raw)
To: nsaenzjulienne
Cc: andrew.murray, bcm-kernel-feedback-list, devicetree, eric,
f.fainelli, james.quinlan, jeremy.linton, linux-arm-kernel,
linux-kernel, linux-pci, linux-rpi-kernel, mark.rutland, maz,
mbrugger, phil, robh+dt, wahrenst, linux
Thanks for your effort! System can have USB with this patch series, if the device tree is modified properly.
Here is the question: Will not the device tree "scb/ranges" in this patch conflict with commit be8af7a9e3cc ("ARM: dts: bcm2711-rpi-4: Enable GENET support")?
Jian-Hong Pan
^ permalink raw reply [flat|nested] 71+ messages in thread
* Re: [PATCH v4 2/8] ARM: dts: bcm2711: Enable PCIe controller
@ 2019-12-16 6:46 ` Jian-Hong Pan
0 siblings, 0 replies; 71+ messages in thread
From: Jian-Hong Pan @ 2019-12-16 6:46 UTC (permalink / raw)
To: nsaenzjulienne
Cc: mark.rutland, devicetree, f.fainelli, robh+dt, linux-pci, phil,
linux-kernel, jeremy.linton, eric, mbrugger,
bcm-kernel-feedback-list, linux-rpi-kernel, james.quinlan, maz,
andrew.murray, linux, linux-arm-kernel, wahrenst
Thanks for your effort! System can have USB with this patch series, if the device tree is modified properly.
Here is the question: Will not the device tree "scb/ranges" in this patch conflict with commit be8af7a9e3cc ("ARM: dts: bcm2711-rpi-4: Enable GENET support")?
Jian-Hong Pan
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply [flat|nested] 71+ messages in thread
* Re: [PATCH v4 2/8] ARM: dts: bcm2711: Enable PCIe controller
2019-12-16 6:46 ` Jian-Hong Pan
@ 2019-12-16 9:49 ` Nicolas Saenz Julienne
-1 siblings, 0 replies; 71+ messages in thread
From: Nicolas Saenz Julienne @ 2019-12-16 9:49 UTC (permalink / raw)
To: Jian-Hong Pan
Cc: mark.rutland, devicetree, f.fainelli, robh+dt, linux-pci, phil,
linux-kernel, jeremy.linton, eric, mbrugger,
bcm-kernel-feedback-list, linux-rpi-kernel, james.quinlan, maz,
andrew.murray, linux, linux-arm-kernel, wahrenst
[-- Attachment #1: Type: text/plain, Size: 536 bytes --]
Hi Jian-Hong,
On Mon, 2019-12-16 at 14:46 +0800, Jian-Hong Pan wrote:
> Thanks for your effort! System can have USB with this patch series, if the
:)
> device tree is modified properly.
> Here is the question: Will not the device tree "scb/ranges" in this patch
> conflict with commit be8af7a9e3cc ("ARM: dts: bcm2711-rpi-4: Enable GENET
> support")?
You're right, the patch needs to be refreshed.
I'm going to send a v5 of the series factoring out all the log2.h changes, and
addressing this.
Regards,
Nicolas
[-- Attachment #2: This is a digitally signed message part --]
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^ permalink raw reply [flat|nested] 71+ messages in thread
* Re: [PATCH v4 2/8] ARM: dts: bcm2711: Enable PCIe controller
@ 2019-12-16 9:49 ` Nicolas Saenz Julienne
0 siblings, 0 replies; 71+ messages in thread
From: Nicolas Saenz Julienne @ 2019-12-16 9:49 UTC (permalink / raw)
To: Jian-Hong Pan
Cc: mark.rutland, devicetree, f.fainelli, mbrugger, linux-pci, phil,
linux-kernel, jeremy.linton, eric, robh+dt,
bcm-kernel-feedback-list, linux-rpi-kernel, james.quinlan, maz,
andrew.murray, linux, linux-arm-kernel, wahrenst
[-- Attachment #1.1: Type: text/plain, Size: 536 bytes --]
Hi Jian-Hong,
On Mon, 2019-12-16 at 14:46 +0800, Jian-Hong Pan wrote:
> Thanks for your effort! System can have USB with this patch series, if the
:)
> device tree is modified properly.
> Here is the question: Will not the device tree "scb/ranges" in this patch
> conflict with commit be8af7a9e3cc ("ARM: dts: bcm2711-rpi-4: Enable GENET
> support")?
You're right, the patch needs to be refreshed.
I'm going to send a v5 of the series factoring out all the log2.h changes, and
addressing this.
Regards,
Nicolas
[-- Attachment #1.2: This is a digitally signed message part --]
[-- Type: application/pgp-signature, Size: 488 bytes --]
[-- Attachment #2: Type: text/plain, Size: 176 bytes --]
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply [flat|nested] 71+ messages in thread
end of thread, other threads:[~2019-12-16 9:49 UTC | newest]
Thread overview: 71+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2019-12-03 11:47 [PATCH v4 0/8] Raspberry Pi 4 PCIe support Nicolas Saenz Julienne
2019-12-03 11:47 ` Nicolas Saenz Julienne
2019-12-03 11:47 ` Nicolas Saenz Julienne
2019-12-03 11:47 ` Nicolas Saenz Julienne
2019-12-03 11:47 ` [PATCH v4 1/8] dt-bindings: PCI: Add bindings for brcmstb's PCIe device Nicolas Saenz Julienne
2019-12-03 11:47 ` Nicolas Saenz Julienne
2019-12-03 15:03 ` Andrew Murray
2019-12-03 15:03 ` Andrew Murray
2019-12-03 11:47 ` [PATCH v4 2/8] ARM: dts: bcm2711: Enable PCIe controller Nicolas Saenz Julienne
2019-12-03 11:47 ` Nicolas Saenz Julienne
2019-12-16 6:46 ` Jian-Hong Pan
2019-12-16 6:46 ` Jian-Hong Pan
2019-12-16 9:49 ` Nicolas Saenz Julienne
2019-12-16 9:49 ` Nicolas Saenz Julienne
2019-12-03 11:47 ` [PATCH v4 3/8] PCI: brcmstb: Add Broadcom STB PCIe host controller driver Nicolas Saenz Julienne
2019-12-03 11:47 ` Nicolas Saenz Julienne
2019-12-03 11:47 ` [PATCH v4 4/8] PCI: brcmstb: Add MSI support Nicolas Saenz Julienne
2019-12-03 11:47 ` Nicolas Saenz Julienne
2019-12-03 11:47 ` [PATCH v4 5/8] MAINTAINERS: Add brcmstb PCIe controller Nicolas Saenz Julienne
2019-12-03 11:47 ` [PATCH v4 6/8] arm64: defconfig: Enable Broadcom's STB " Nicolas Saenz Julienne
2019-12-03 11:47 ` Nicolas Saenz Julienne
2019-12-03 11:47 ` [PATCH v4 7/8] linux/log2.h: Fix 64bit calculations in roundup/down_pow_two() Nicolas Saenz Julienne
2019-12-03 11:47 ` Nicolas Saenz Julienne
2019-12-03 11:47 ` Nicolas Saenz Julienne
2019-12-03 16:39 ` Chuck Lever
2019-12-03 16:39 ` Chuck Lever
2019-12-03 16:39 ` Chuck Lever
2019-12-03 16:39 ` Chuck Lever
2019-12-04 10:56 ` Martin Habets
2019-12-04 10:56 ` Martin Habets
2019-12-04 10:56 ` Martin Habets
2019-12-04 10:56 ` Martin Habets
2019-12-04 14:17 ` Leon Romanovsky
2019-12-04 14:17 ` Leon Romanovsky
2019-12-04 14:17 ` Leon Romanovsky
2019-12-05 0:39 ` Lu Baolu
2019-12-05 0:39 ` Lu Baolu
2019-12-05 0:39 ` Lu Baolu
2019-12-05 17:48 ` Robin Murphy
2019-12-05 17:48 ` Robin Murphy
2019-12-05 17:48 ` Robin Murphy
2019-12-12 12:31 ` Nicolas Saenz Julienne
2019-12-12 12:31 ` Nicolas Saenz Julienne
2019-12-12 12:31 ` Nicolas Saenz Julienne
2019-12-05 22:30 ` Bjorn Helgaas
2019-12-05 22:30 ` Bjorn Helgaas
2019-12-05 22:30 ` Bjorn Helgaas
2019-12-05 22:30 ` Bjorn Helgaas
2019-12-12 13:16 ` Nicolas Saenz Julienne
2019-12-12 13:16 ` Nicolas Saenz Julienne
2019-12-12 13:16 ` Nicolas Saenz Julienne
2019-12-12 13:16 ` Nicolas Saenz Julienne
2019-12-03 11:47 ` [PATCH v4 8/8] linux/log2.h: Use roundup/dow_pow_two() on 64bit calculations Nicolas Saenz Julienne
2019-12-03 11:47 ` Nicolas Saenz Julienne
2019-12-03 11:47 ` Nicolas Saenz Julienne
2019-12-03 15:53 ` Rob Herring
2019-12-03 15:53 ` Rob Herring
2019-12-03 15:53 ` Rob Herring
2019-12-03 15:53 ` Rob Herring
2019-12-03 16:06 ` Nicolas Saenz Julienne
2019-12-03 16:06 ` Nicolas Saenz Julienne
2019-12-03 16:06 ` Nicolas Saenz Julienne
2019-12-03 16:06 ` Nicolas Saenz Julienne
2019-12-05 20:38 ` Bjorn Helgaas
2019-12-05 20:38 ` Bjorn Helgaas
2019-12-05 20:38 ` Bjorn Helgaas
2019-12-05 20:38 ` Bjorn Helgaas
2019-12-12 13:21 ` Nicolas Saenz Julienne
2019-12-12 13:21 ` Nicolas Saenz Julienne
2019-12-12 13:21 ` Nicolas Saenz Julienne
2019-12-12 13:21 ` Nicolas Saenz Julienne
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