* [PATCH v3 1/6] ACPI: arm64: Move DMA setup operations out of IORT
2021-06-02 15:44 [PATCH v3 0/6] Add support for ACPI VIOT Jean-Philippe Brucker
@ 2021-06-02 15:44 ` Jean-Philippe Brucker
2021-06-02 15:44 ` [PATCH v3 2/6] ACPI: Move IOMMU setup code " Jean-Philippe Brucker
` (4 subsequent siblings)
5 siblings, 0 replies; 11+ messages in thread
From: Jean-Philippe Brucker @ 2021-06-02 15:44 UTC (permalink / raw)
To: rjw, lenb, joro, mst
Cc: jean-philippe, kevin.tian, catalin.marinas, sudeep.holla,
robin.murphy, virtualization, linux-acpi, iommu, sebastien.boeuf,
guohanjun, will, dwmw2, linux-arm-kernel
Extract generic DMA setup code out of IORT, so it can be reused by VIOT.
Keep it in drivers/acpi/arm64 for now, since it could break x86
platforms that haven't run this code so far, if they have invalid
tables.
Signed-off-by: Jean-Philippe Brucker <jean-philippe@linaro.org>
---
drivers/acpi/arm64/Makefile | 1 +
include/linux/acpi.h | 3 +++
include/linux/acpi_iort.h | 6 ++---
drivers/acpi/arm64/dma.c | 50 ++++++++++++++++++++++++++++++++++
drivers/acpi/arm64/iort.c | 54 ++++++-------------------------------
drivers/acpi/scan.c | 2 +-
6 files changed, 66 insertions(+), 50 deletions(-)
create mode 100644 drivers/acpi/arm64/dma.c
diff --git a/drivers/acpi/arm64/Makefile b/drivers/acpi/arm64/Makefile
index 6ff50f4ed947..66acbe77f46e 100644
--- a/drivers/acpi/arm64/Makefile
+++ b/drivers/acpi/arm64/Makefile
@@ -1,3 +1,4 @@
# SPDX-License-Identifier: GPL-2.0-only
obj-$(CONFIG_ACPI_IORT) += iort.o
obj-$(CONFIG_ACPI_GTDT) += gtdt.o
+obj-y += dma.o
diff --git a/include/linux/acpi.h b/include/linux/acpi.h
index c60745f657e9..7aaa9559cc19 100644
--- a/include/linux/acpi.h
+++ b/include/linux/acpi.h
@@ -259,9 +259,12 @@ void acpi_numa_x2apic_affinity_init(struct acpi_srat_x2apic_cpu_affinity *pa);
#ifdef CONFIG_ARM64
void acpi_numa_gicc_affinity_init(struct acpi_srat_gicc_affinity *pa);
+void acpi_arch_dma_setup(struct device *dev, u64 *dma_addr, u64 *dma_size);
#else
static inline void
acpi_numa_gicc_affinity_init(struct acpi_srat_gicc_affinity *pa) { }
+static inline void
+acpi_arch_dma_setup(struct device *dev, u64 *dma_addr, u64 *dma_size) { }
#endif
int acpi_numa_memory_affinity_init (struct acpi_srat_mem_affinity *ma);
diff --git a/include/linux/acpi_iort.h b/include/linux/acpi_iort.h
index 1a12baa58e40..f7f054833afd 100644
--- a/include/linux/acpi_iort.h
+++ b/include/linux/acpi_iort.h
@@ -34,7 +34,7 @@ struct irq_domain *iort_get_device_domain(struct device *dev, u32 id,
void acpi_configure_pmsi_domain(struct device *dev);
int iort_pmsi_get_dev_id(struct device *dev, u32 *dev_id);
/* IOMMU interface */
-void iort_dma_setup(struct device *dev, u64 *dma_addr, u64 *size);
+int iort_dma_get_ranges(struct device *dev, u64 *size);
const struct iommu_ops *iort_iommu_configure_id(struct device *dev,
const u32 *id_in);
int iort_iommu_msi_get_resv_regions(struct device *dev, struct list_head *head);
@@ -48,8 +48,8 @@ static inline struct irq_domain *iort_get_device_domain(
{ return NULL; }
static inline void acpi_configure_pmsi_domain(struct device *dev) { }
/* IOMMU interface */
-static inline void iort_dma_setup(struct device *dev, u64 *dma_addr,
- u64 *size) { }
+static inline int iort_dma_get_ranges(struct device *dev, u64 *size)
+{ return -ENODEV; }
static inline const struct iommu_ops *iort_iommu_configure_id(
struct device *dev, const u32 *id_in)
{ return NULL; }
diff --git a/drivers/acpi/arm64/dma.c b/drivers/acpi/arm64/dma.c
new file mode 100644
index 000000000000..f16739ad3cc0
--- /dev/null
+++ b/drivers/acpi/arm64/dma.c
@@ -0,0 +1,50 @@
+// SPDX-License-Identifier: GPL-2.0-only
+#include <linux/acpi.h>
+#include <linux/acpi_iort.h>
+#include <linux/device.h>
+#include <linux/dma-direct.h>
+
+void acpi_arch_dma_setup(struct device *dev, u64 *dma_addr, u64 *dma_size)
+{
+ int ret;
+ u64 end, mask;
+ u64 dmaaddr = 0, size = 0, offset = 0;
+
+ /*
+ * If @dev is expected to be DMA-capable then the bus code that created
+ * it should have initialised its dma_mask pointer by this point. For
+ * now, we'll continue the legacy behaviour of coercing it to the
+ * coherent mask if not, but we'll no longer do so quietly.
+ */
+ if (!dev->dma_mask) {
+ dev_warn(dev, "DMA mask not set\n");
+ dev->dma_mask = &dev->coherent_dma_mask;
+ }
+
+ if (dev->coherent_dma_mask)
+ size = max(dev->coherent_dma_mask, dev->coherent_dma_mask + 1);
+ else
+ size = 1ULL << 32;
+
+ ret = acpi_dma_get_range(dev, &dmaaddr, &offset, &size);
+ if (ret == -ENODEV)
+ ret = iort_dma_get_ranges(dev, &size);
+ if (!ret) {
+ /*
+ * Limit coherent and dma mask based on size retrieved from
+ * firmware.
+ */
+ end = dmaaddr + size - 1;
+ mask = DMA_BIT_MASK(ilog2(end) + 1);
+ dev->bus_dma_limit = end;
+ dev->coherent_dma_mask = min(dev->coherent_dma_mask, mask);
+ *dev->dma_mask = min(*dev->dma_mask, mask);
+ }
+
+ *dma_addr = dmaaddr;
+ *dma_size = size;
+
+ ret = dma_direct_set_offset(dev, dmaaddr + offset, dmaaddr, size);
+
+ dev_dbg(dev, "dma_offset(%#08llx)%s\n", offset, ret ? " failed!" : "");
+}
diff --git a/drivers/acpi/arm64/iort.c b/drivers/acpi/arm64/iort.c
index 3912a1f6058e..a940be1cf2af 100644
--- a/drivers/acpi/arm64/iort.c
+++ b/drivers/acpi/arm64/iort.c
@@ -1144,56 +1144,18 @@ static int rc_dma_get_range(struct device *dev, u64 *size)
}
/**
- * iort_dma_setup() - Set-up device DMA parameters.
+ * iort_dma_get_ranges() - Look up DMA addressing limit for the device
+ * @dev: device to lookup
+ * @size: DMA range size result pointer
*
- * @dev: device to configure
- * @dma_addr: device DMA address result pointer
- * @dma_size: DMA range size result pointer
+ * Return: 0 on success, an error otherwise.
*/
-void iort_dma_setup(struct device *dev, u64 *dma_addr, u64 *dma_size)
+int iort_dma_get_ranges(struct device *dev, u64 *size)
{
- u64 end, mask, dmaaddr = 0, size = 0, offset = 0;
- int ret;
-
- /*
- * If @dev is expected to be DMA-capable then the bus code that created
- * it should have initialised its dma_mask pointer by this point. For
- * now, we'll continue the legacy behaviour of coercing it to the
- * coherent mask if not, but we'll no longer do so quietly.
- */
- if (!dev->dma_mask) {
- dev_warn(dev, "DMA mask not set\n");
- dev->dma_mask = &dev->coherent_dma_mask;
- }
-
- if (dev->coherent_dma_mask)
- size = max(dev->coherent_dma_mask, dev->coherent_dma_mask + 1);
+ if (dev_is_pci(dev))
+ return rc_dma_get_range(dev, size);
else
- size = 1ULL << 32;
-
- ret = acpi_dma_get_range(dev, &dmaaddr, &offset, &size);
- if (ret == -ENODEV)
- ret = dev_is_pci(dev) ? rc_dma_get_range(dev, &size)
- : nc_dma_get_range(dev, &size);
-
- if (!ret) {
- /*
- * Limit coherent and dma mask based on size retrieved from
- * firmware.
- */
- end = dmaaddr + size - 1;
- mask = DMA_BIT_MASK(ilog2(end) + 1);
- dev->bus_dma_limit = end;
- dev->coherent_dma_mask = min(dev->coherent_dma_mask, mask);
- *dev->dma_mask = min(*dev->dma_mask, mask);
- }
-
- *dma_addr = dmaaddr;
- *dma_size = size;
-
- ret = dma_direct_set_offset(dev, dmaaddr + offset, dmaaddr, size);
-
- dev_dbg(dev, "dma_offset(%#08llx)%s\n", offset, ret ? " failed!" : "");
+ return nc_dma_get_range(dev, size);
}
static void __init acpi_iort_register_irq(int hwirq, const char *name,
diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index e10d38ac7cf2..ea613df8f913 100644
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -1537,7 +1537,7 @@ int acpi_dma_configure_id(struct device *dev, enum dev_dma_attr attr,
return 0;
}
- iort_dma_setup(dev, &dma_addr, &size);
+ acpi_arch_dma_setup(dev, &dma_addr, &size);
iommu = iort_iommu_configure_id(dev, input_id);
if (PTR_ERR(iommu) == -EPROBE_DEFER)
--
2.31.1
_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu
^ permalink raw reply related [flat|nested] 11+ messages in thread* [PATCH v3 2/6] ACPI: Move IOMMU setup code out of IORT
2021-06-02 15:44 [PATCH v3 0/6] Add support for ACPI VIOT Jean-Philippe Brucker
2021-06-02 15:44 ` [PATCH v3 1/6] ACPI: arm64: Move DMA setup operations out of IORT Jean-Philippe Brucker
@ 2021-06-02 15:44 ` Jean-Philippe Brucker
2021-06-02 20:06 ` kernel test robot
2021-06-02 15:44 ` [PATCH v3 3/6] ACPI: Add driver for the VIOT table Jean-Philippe Brucker
` (3 subsequent siblings)
5 siblings, 1 reply; 11+ messages in thread
From: Jean-Philippe Brucker @ 2021-06-02 15:44 UTC (permalink / raw)
To: rjw, lenb, joro, mst
Cc: jean-philippe, kevin.tian, catalin.marinas, sudeep.holla,
robin.murphy, virtualization, linux-acpi, iommu, sebastien.boeuf,
guohanjun, will, dwmw2, linux-arm-kernel
Extract the code that sets up the IOMMU infrastructure from IORT, since
it can be reused by VIOT. Move it one level up into a new
acpi_iommu_configure_id() function, which calls the IORT parsing
function which in turn calls the acpi_iommu_fwspec_init() helper.
Signed-off-by: Jean-Philippe Brucker <jean-philippe@linaro.org>
---
include/acpi/acpi_bus.h | 3 ++
include/linux/acpi_iort.h | 8 ++---
drivers/acpi/arm64/iort.c | 75 +++++----------------------------------
drivers/acpi/scan.c | 55 +++++++++++++++++++++++++++-
4 files changed, 69 insertions(+), 72 deletions(-)
diff --git a/include/acpi/acpi_bus.h b/include/acpi/acpi_bus.h
index 3a82faac5767..41f092a269f6 100644
--- a/include/acpi/acpi_bus.h
+++ b/include/acpi/acpi_bus.h
@@ -588,6 +588,9 @@ struct acpi_pci_root {
bool acpi_dma_supported(struct acpi_device *adev);
enum dev_dma_attr acpi_get_dma_attr(struct acpi_device *adev);
+int acpi_iommu_fwspec_init(struct device *dev, u32 id,
+ struct fwnode_handle *fwnode,
+ const struct iommu_ops *ops);
int acpi_dma_get_range(struct device *dev, u64 *dma_addr, u64 *offset,
u64 *size);
int acpi_dma_configure_id(struct device *dev, enum dev_dma_attr attr,
diff --git a/include/linux/acpi_iort.h b/include/linux/acpi_iort.h
index f7f054833afd..f1f0842a2cb2 100644
--- a/include/linux/acpi_iort.h
+++ b/include/linux/acpi_iort.h
@@ -35,8 +35,7 @@ void acpi_configure_pmsi_domain(struct device *dev);
int iort_pmsi_get_dev_id(struct device *dev, u32 *dev_id);
/* IOMMU interface */
int iort_dma_get_ranges(struct device *dev, u64 *size);
-const struct iommu_ops *iort_iommu_configure_id(struct device *dev,
- const u32 *id_in);
+int iort_iommu_configure_id(struct device *dev, const u32 *id_in);
int iort_iommu_msi_get_resv_regions(struct device *dev, struct list_head *head);
phys_addr_t acpi_iort_dma_get_max_cpu_address(void);
#else
@@ -50,9 +49,8 @@ static inline void acpi_configure_pmsi_domain(struct device *dev) { }
/* IOMMU interface */
static inline int iort_dma_get_ranges(struct device *dev, u64 *size)
{ return -ENODEV; }
-static inline const struct iommu_ops *iort_iommu_configure_id(
- struct device *dev, const u32 *id_in)
-{ return NULL; }
+static inline int iort_iommu_configure_id(struct device *dev, const u32 *id_in)
+{ return -ENODEV; }
static inline
int iort_iommu_msi_get_resv_regions(struct device *dev, struct list_head *head)
{ return 0; }
diff --git a/drivers/acpi/arm64/iort.c b/drivers/acpi/arm64/iort.c
index a940be1cf2af..b5b021e064b6 100644
--- a/drivers/acpi/arm64/iort.c
+++ b/drivers/acpi/arm64/iort.c
@@ -806,23 +806,6 @@ static struct acpi_iort_node *iort_get_msi_resv_iommu(struct device *dev)
return NULL;
}
-static inline const struct iommu_ops *iort_fwspec_iommu_ops(struct device *dev)
-{
- struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev);
-
- return (fwspec && fwspec->ops) ? fwspec->ops : NULL;
-}
-
-static inline int iort_add_device_replay(struct device *dev)
-{
- int err = 0;
-
- if (dev->bus && !device_iommu_mapped(dev))
- err = iommu_probe_device(dev);
-
- return err;
-}
-
/**
* iort_iommu_msi_get_resv_regions - Reserved region driver helper
* @dev: Device from iommu_get_resv_regions()
@@ -900,18 +883,6 @@ static inline bool iort_iommu_driver_enabled(u8 type)
}
}
-static int arm_smmu_iort_xlate(struct device *dev, u32 streamid,
- struct fwnode_handle *fwnode,
- const struct iommu_ops *ops)
-{
- int ret = iommu_fwspec_init(dev, fwnode, ops);
-
- if (!ret)
- ret = iommu_fwspec_add_ids(dev, &streamid, 1);
-
- return ret;
-}
-
static bool iort_pci_rc_supports_ats(struct acpi_iort_node *node)
{
struct acpi_iort_root_complex *pci_rc;
@@ -946,7 +917,7 @@ static int iort_iommu_xlate(struct device *dev, struct acpi_iort_node *node,
return iort_iommu_driver_enabled(node->type) ?
-EPROBE_DEFER : -ENODEV;
- return arm_smmu_iort_xlate(dev, streamid, iort_fwnode, ops);
+ return acpi_iommu_fwspec_init(dev, streamid, iort_fwnode, ops);
}
struct iort_pci_alias_info {
@@ -1020,24 +991,14 @@ static int iort_nc_iommu_map_id(struct device *dev,
* @dev: device to configure
* @id_in: optional input id const value pointer
*
- * Returns: iommu_ops pointer on configuration success
- * NULL on configuration failure
+ * Returns: 0 on success, <0 on failure
*/
-const struct iommu_ops *iort_iommu_configure_id(struct device *dev,
- const u32 *id_in)
+int iort_iommu_configure_id(struct device *dev, const u32 *id_in)
{
struct acpi_iort_node *node;
- const struct iommu_ops *ops;
+ const struct iommu_ops *ops = NULL;
int err = -ENODEV;
- /*
- * If we already translated the fwspec there
- * is nothing left to do, return the iommu_ops.
- */
- ops = iort_fwspec_iommu_ops(dev);
- if (ops)
- return ops;
-
if (dev_is_pci(dev)) {
struct iommu_fwspec *fwspec;
struct pci_bus *bus = to_pci_dev(dev)->bus;
@@ -1046,7 +1007,7 @@ const struct iommu_ops *iort_iommu_configure_id(struct device *dev,
node = iort_scan_node(ACPI_IORT_NODE_PCI_ROOT_COMPLEX,
iort_match_node_callback, &bus->dev);
if (!node)
- return NULL;
+ return -ENODEV;
info.node = node;
err = pci_for_each_dma_alias(to_pci_dev(dev),
@@ -1059,7 +1020,7 @@ const struct iommu_ops *iort_iommu_configure_id(struct device *dev,
node = iort_scan_node(ACPI_IORT_NODE_NAMED_COMPONENT,
iort_match_node_callback, dev);
if (!node)
- return NULL;
+ return -ENODEV;
err = id_in ? iort_nc_iommu_map_id(dev, node, id_in) :
iort_nc_iommu_map(dev, node);
@@ -1068,32 +1029,14 @@ const struct iommu_ops *iort_iommu_configure_id(struct device *dev,
iort_named_component_init(dev, node);
}
- /*
- * If we have reason to believe the IOMMU driver missed the initial
- * add_device callback for dev, replay it to get things in order.
- */
- if (!err) {
- ops = iort_fwspec_iommu_ops(dev);
- err = iort_add_device_replay(dev);
- }
-
- /* Ignore all other errors apart from EPROBE_DEFER */
- if (err == -EPROBE_DEFER) {
- ops = ERR_PTR(err);
- } else if (err) {
- dev_dbg(dev, "Adding to IOMMU failed: %d\n", err);
- ops = NULL;
- }
-
- return ops;
+ return err;
}
#else
int iort_iommu_msi_get_resv_regions(struct device *dev, struct list_head *head)
{ return 0; }
-const struct iommu_ops *iort_iommu_configure_id(struct device *dev,
- const u32 *input_id)
-{ return NULL; }
+int iort_iommu_configure_id(struct device *dev, const u32 *input_id)
+{ return -ENODEV; }
#endif
static int nc_dma_get_range(struct device *dev, u64 *size)
diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index ea613df8f913..696b81432ae7 100644
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -9,6 +9,7 @@
#include <linux/kernel.h>
#include <linux/acpi.h>
#include <linux/acpi_iort.h>
+#include <linux/iommu.h>
#include <linux/signal.h>
#include <linux/kthread.h>
#include <linux/dmi.h>
@@ -1520,6 +1521,58 @@ int acpi_dma_get_range(struct device *dev, u64 *dma_addr, u64 *offset,
return ret >= 0 ? 0 : ret;
}
+int acpi_iommu_fwspec_init(struct device *dev, u32 id,
+ struct fwnode_handle *fwnode,
+ const struct iommu_ops *ops)
+{
+ int ret = iommu_fwspec_init(dev, fwnode, ops);
+
+ if (!ret)
+ ret = iommu_fwspec_add_ids(dev, &id, 1);
+
+ return ret;
+}
+
+static inline const struct iommu_ops *acpi_iommu_fwspec_ops(struct device *dev)
+{
+ struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev);
+
+ return fwspec ? fwspec->ops : NULL;
+}
+
+static const struct iommu_ops *acpi_iommu_configure_id(struct device *dev,
+ const u32 *id_in)
+{
+ int err;
+ const struct iommu_ops *ops;
+
+ /*
+ * If we already translated the fwspec there is nothing left to do,
+ * return the iommu_ops.
+ */
+ ops = acpi_iommu_fwspec_ops(dev);
+ if (ops)
+ return ops;
+
+ err = iort_iommu_configure_id(dev, id_in);
+
+ /*
+ * If we have reason to believe the IOMMU driver missed the initial
+ * add_device callback for dev, replay it to get things in order.
+ */
+ if (!err && dev->bus && !device_iommu_mapped(dev))
+ err = iommu_probe_device(dev);
+
+ /* Ignore all other errors apart from EPROBE_DEFER */
+ if (err == -EPROBE_DEFER) {
+ return ERR_PTR(err);
+ } else if (err) {
+ dev_dbg(dev, "Adding to IOMMU failed: %d\n", err);
+ return NULL;
+ }
+ return acpi_iommu_fwspec_ops(dev);
+}
+
/**
* acpi_dma_configure_id - Set-up DMA configuration for the device.
* @dev: The pointer to the device
@@ -1539,7 +1592,7 @@ int acpi_dma_configure_id(struct device *dev, enum dev_dma_attr attr,
acpi_arch_dma_setup(dev, &dma_addr, &size);
- iommu = iort_iommu_configure_id(dev, input_id);
+ iommu = acpi_iommu_configure_id(dev, input_id);
if (PTR_ERR(iommu) == -EPROBE_DEFER)
return -EPROBE_DEFER;
--
2.31.1
_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu
^ permalink raw reply related [flat|nested] 11+ messages in thread* Re: [PATCH v3 2/6] ACPI: Move IOMMU setup code out of IORT
2021-06-02 15:44 ` [PATCH v3 2/6] ACPI: Move IOMMU setup code " Jean-Philippe Brucker
@ 2021-06-02 20:06 ` kernel test robot
2021-06-03 7:26 ` Jean-Philippe Brucker
0 siblings, 1 reply; 11+ messages in thread
From: kernel test robot @ 2021-06-02 20:06 UTC (permalink / raw)
To: Jean-Philippe Brucker, rjw, lenb, joro, mst
Cc: kbuild-all, linux-acpi, will, clang-built-linux, iommu,
catalin.marinas, dwmw2
[-- Attachment #1: Type: text/plain, Size: 3506 bytes --]
Hi Jean-Philippe,
I love your patch! Yet something to improve:
[auto build test ERROR on pm/linux-next]
[also build test ERROR on iommu/next arm64/for-next/core linus/master v5.13-rc4 next-20210602]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]
url: https://github.com/0day-ci/linux/commits/Jean-Philippe-Brucker/Add-support-for-ACPI-VIOT/20210602-235849
base: https://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git linux-next
config: x86_64-randconfig-a012-20210602 (attached as .config)
compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project d41cb6bb2607fa5c7a9df2b3dab361353657d225)
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# install x86_64 cross compiling tool for clang build
# apt-get install binutils-x86-64-linux-gnu
# https://github.com/0day-ci/linux/commit/937da71a81108243877fb1f0f568e56a08a62c50
git remote add linux-review https://github.com/0day-ci/linux
git fetch --no-tags linux-review Jean-Philippe-Brucker/Add-support-for-ACPI-VIOT/20210602-235849
git checkout 937da71a81108243877fb1f0f568e56a08a62c50
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>
All errors (new ones prefixed by >>):
>> drivers/acpi/scan.c:1540:26: error: no member named 'ops' in 'struct iommu_fwspec'
return fwspec ? fwspec->ops : NULL;
~~~~~~ ^
>> drivers/acpi/scan.c:1564:9: error: implicit declaration of function 'iommu_probe_device' [-Werror,-Wimplicit-function-declaration]
err = iommu_probe_device(dev);
^
2 errors generated.
vim +1540 drivers/acpi/scan.c
1535
1536 static inline const struct iommu_ops *acpi_iommu_fwspec_ops(struct device *dev)
1537 {
1538 struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev);
1539
> 1540 return fwspec ? fwspec->ops : NULL;
1541 }
1542
1543 static const struct iommu_ops *acpi_iommu_configure_id(struct device *dev,
1544 const u32 *id_in)
1545 {
1546 int err;
1547 const struct iommu_ops *ops;
1548
1549 /*
1550 * If we already translated the fwspec there is nothing left to do,
1551 * return the iommu_ops.
1552 */
1553 ops = acpi_iommu_fwspec_ops(dev);
1554 if (ops)
1555 return ops;
1556
1557 err = iort_iommu_configure_id(dev, id_in);
1558
1559 /*
1560 * If we have reason to believe the IOMMU driver missed the initial
1561 * add_device callback for dev, replay it to get things in order.
1562 */
1563 if (!err && dev->bus && !device_iommu_mapped(dev))
> 1564 err = iommu_probe_device(dev);
1565
1566 /* Ignore all other errors apart from EPROBE_DEFER */
1567 if (err == -EPROBE_DEFER) {
1568 return ERR_PTR(err);
1569 } else if (err) {
1570 dev_dbg(dev, "Adding to IOMMU failed: %d\n", err);
1571 return NULL;
1572 }
1573 return acpi_iommu_fwspec_ops(dev);
1574 }
1575
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
[-- Attachment #2: .config.gz --]
[-- Type: application/gzip, Size: 33696 bytes --]
[-- Attachment #3: Type: text/plain, Size: 156 bytes --]
_______________________________________________
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https://lists.linuxfoundation.org/mailman/listinfo/iommu
^ permalink raw reply [flat|nested] 11+ messages in thread* Re: [PATCH v3 2/6] ACPI: Move IOMMU setup code out of IORT
2021-06-02 20:06 ` kernel test robot
@ 2021-06-03 7:26 ` Jean-Philippe Brucker
2021-06-04 15:22 ` Joerg Roedel
0 siblings, 1 reply; 11+ messages in thread
From: Jean-Philippe Brucker @ 2021-06-03 7:26 UTC (permalink / raw)
To: kernel test robot
Cc: kbuild-all, linux-acpi, mst, catalin.marinas, rjw,
clang-built-linux, iommu, will, dwmw2, lenb
On Thu, Jun 03, 2021 at 04:06:18AM +0800, kernel test robot wrote:
> >> drivers/acpi/scan.c:1540:26: error: no member named 'ops' in 'struct iommu_fwspec'
> return fwspec ? fwspec->ops : NULL;
> ~~~~~~ ^
> >> drivers/acpi/scan.c:1564:9: error: implicit declaration of function 'iommu_probe_device' [-Werror,-Wimplicit-function-declaration]
> err = iommu_probe_device(dev);
> ^
These are only defined when CONFIG_IOMMU_API is set. IORT uses them inside
an #ifdef, I can do the same. Maybe moving these two functions to a new
drivers/acpi/iommu.c would be nicer, though.
Thanks,
Jean
> 2 errors generated.
>
>
> vim +1540 drivers/acpi/scan.c
>
> 1535
> 1536 static inline const struct iommu_ops *acpi_iommu_fwspec_ops(struct device *dev)
> 1537 {
> 1538 struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev);
> 1539
> > 1540 return fwspec ? fwspec->ops : NULL;
> 1541 }
> 1542
> 1543 static const struct iommu_ops *acpi_iommu_configure_id(struct device *dev,
> 1544 const u32 *id_in)
> 1545 {
> 1546 int err;
> 1547 const struct iommu_ops *ops;
> 1548
> 1549 /*
> 1550 * If we already translated the fwspec there is nothing left to do,
> 1551 * return the iommu_ops.
> 1552 */
> 1553 ops = acpi_iommu_fwspec_ops(dev);
> 1554 if (ops)
> 1555 return ops;
> 1556
> 1557 err = iort_iommu_configure_id(dev, id_in);
> 1558
> 1559 /*
> 1560 * If we have reason to believe the IOMMU driver missed the initial
> 1561 * add_device callback for dev, replay it to get things in order.
> 1562 */
> 1563 if (!err && dev->bus && !device_iommu_mapped(dev))
> > 1564 err = iommu_probe_device(dev);
> 1565
> 1566 /* Ignore all other errors apart from EPROBE_DEFER */
> 1567 if (err == -EPROBE_DEFER) {
> 1568 return ERR_PTR(err);
> 1569 } else if (err) {
> 1570 dev_dbg(dev, "Adding to IOMMU failed: %d\n", err);
> 1571 return NULL;
> 1572 }
> 1573 return acpi_iommu_fwspec_ops(dev);
> 1574 }
> 1575
>
> ---
> 0-DAY CI Kernel Test Service, Intel Corporation
> https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
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^ permalink raw reply [flat|nested] 11+ messages in thread* Re: [PATCH v3 2/6] ACPI: Move IOMMU setup code out of IORT
2021-06-03 7:26 ` Jean-Philippe Brucker
@ 2021-06-04 15:22 ` Joerg Roedel
2021-06-10 7:26 ` Jean-Philippe Brucker
0 siblings, 1 reply; 11+ messages in thread
From: Joerg Roedel @ 2021-06-04 15:22 UTC (permalink / raw)
To: Jean-Philippe Brucker
Cc: kbuild-all, kernel test robot, mst, catalin.marinas, rjw,
linux-acpi, clang-built-linux, iommu, will, dwmw2, lenb
On Thu, Jun 03, 2021 at 09:26:39AM +0200, Jean-Philippe Brucker wrote:
> These are only defined when CONFIG_IOMMU_API is set. IORT uses them inside
> an #ifdef, I can do the same. Maybe moving these two functions to a new
> drivers/acpi/iommu.c would be nicer, though.
Not sure what the ACPI maintainers and reviewers prefer, but I would
just #ifdef the functions and provide stubs in the #else path if
necessary.
Regards,
Joerg
_______________________________________________
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iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu
^ permalink raw reply [flat|nested] 11+ messages in thread
* Re: [PATCH v3 2/6] ACPI: Move IOMMU setup code out of IORT
2021-06-04 15:22 ` Joerg Roedel
@ 2021-06-10 7:26 ` Jean-Philippe Brucker
0 siblings, 0 replies; 11+ messages in thread
From: Jean-Philippe Brucker @ 2021-06-10 7:26 UTC (permalink / raw)
To: Joerg Roedel
Cc: kbuild-all, kernel test robot, mst, catalin.marinas, rjw,
linux-acpi, clang-built-linux, iommu, will, dwmw2, lenb
On Fri, Jun 04, 2021 at 05:22:07PM +0200, Joerg Roedel wrote:
> On Thu, Jun 03, 2021 at 09:26:39AM +0200, Jean-Philippe Brucker wrote:
> > These are only defined when CONFIG_IOMMU_API is set. IORT uses them inside
> > an #ifdef, I can do the same. Maybe moving these two functions to a new
> > drivers/acpi/iommu.c would be nicer, though.
>
> Not sure what the ACPI maintainers and reviewers prefer, but I would
> just #ifdef the functions and provide stubs in the #else path if
> necessary.
Yes, I'll resend with that
Thanks,
Jean
_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu
^ permalink raw reply [flat|nested] 11+ messages in thread
* [PATCH v3 3/6] ACPI: Add driver for the VIOT table
2021-06-02 15:44 [PATCH v3 0/6] Add support for ACPI VIOT Jean-Philippe Brucker
2021-06-02 15:44 ` [PATCH v3 1/6] ACPI: arm64: Move DMA setup operations out of IORT Jean-Philippe Brucker
2021-06-02 15:44 ` [PATCH v3 2/6] ACPI: Move IOMMU setup code " Jean-Philippe Brucker
@ 2021-06-02 15:44 ` Jean-Philippe Brucker
2021-06-02 15:44 ` [PATCH v3 4/6] iommu/dma: Pass address limit rather than size to iommu_setup_dma_ops() Jean-Philippe Brucker
` (2 subsequent siblings)
5 siblings, 0 replies; 11+ messages in thread
From: Jean-Philippe Brucker @ 2021-06-02 15:44 UTC (permalink / raw)
To: rjw, lenb, joro, mst
Cc: jean-philippe, kevin.tian, catalin.marinas, sudeep.holla,
robin.murphy, virtualization, linux-acpi, iommu, sebastien.boeuf,
guohanjun, will, dwmw2, linux-arm-kernel
The ACPI Virtual I/O Translation Table describes topology of
para-virtual platforms, similarly to vendor tables DMAR, IVRS and IORT.
For now it describes the relation between virtio-iommu and the endpoints
it manages.
Three steps are needed to configure DMA of endpoints:
(1) acpi_viot_init(): parse the VIOT table, find or create the fwnode
associated to each vIOMMU device.
(2) When probing the vIOMMU device, the driver registers its IOMMU ops
within the IOMMU subsystem. This step doesn't require any
intervention from the VIOT driver.
(3) viot_iommu_configure(): before binding the endpoint to a driver,
find the associated IOMMU ops. Register them, along with the
endpoint ID, into the device's iommu_fwspec.
If step (3) happens before step (2), it is deferred until the IOMMU is
initialized, then retried.
Signed-off-by: Jean-Philippe Brucker <jean-philippe@linaro.org>
---
drivers/acpi/Kconfig | 3 +
drivers/iommu/Kconfig | 1 +
drivers/acpi/Makefile | 2 +
include/linux/acpi_viot.h | 19 ++
drivers/acpi/bus.c | 2 +
drivers/acpi/scan.c | 3 +
drivers/acpi/viot.c | 364 ++++++++++++++++++++++++++++++++++++++
MAINTAINERS | 8 +
8 files changed, 402 insertions(+)
create mode 100644 include/linux/acpi_viot.h
create mode 100644 drivers/acpi/viot.c
diff --git a/drivers/acpi/Kconfig b/drivers/acpi/Kconfig
index eedec61e3476..3758c6940ed7 100644
--- a/drivers/acpi/Kconfig
+++ b/drivers/acpi/Kconfig
@@ -526,6 +526,9 @@ endif
source "drivers/acpi/pmic/Kconfig"
+config ACPI_VIOT
+ bool
+
endif # ACPI
config X86_PM_TIMER
diff --git a/drivers/iommu/Kconfig b/drivers/iommu/Kconfig
index 1f111b399bca..aff8a4830dd1 100644
--- a/drivers/iommu/Kconfig
+++ b/drivers/iommu/Kconfig
@@ -403,6 +403,7 @@ config VIRTIO_IOMMU
depends on ARM64
select IOMMU_API
select INTERVAL_TREE
+ select ACPI_VIOT if ACPI
help
Para-virtualised IOMMU driver with virtio.
diff --git a/drivers/acpi/Makefile b/drivers/acpi/Makefile
index 700b41adf2db..a6e644c48987 100644
--- a/drivers/acpi/Makefile
+++ b/drivers/acpi/Makefile
@@ -118,3 +118,5 @@ video-objs += acpi_video.o video_detect.o
obj-y += dptf/
obj-$(CONFIG_ARM64) += arm64/
+
+obj-$(CONFIG_ACPI_VIOT) += viot.o
diff --git a/include/linux/acpi_viot.h b/include/linux/acpi_viot.h
new file mode 100644
index 000000000000..1eb8ee5b0e5f
--- /dev/null
+++ b/include/linux/acpi_viot.h
@@ -0,0 +1,19 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#ifndef __ACPI_VIOT_H__
+#define __ACPI_VIOT_H__
+
+#include <linux/acpi.h>
+
+#ifdef CONFIG_ACPI_VIOT
+void __init acpi_viot_init(void);
+int viot_iommu_configure(struct device *dev);
+#else
+static inline void acpi_viot_init(void) {}
+static inline int viot_iommu_configure(struct device *dev)
+{
+ return -ENODEV;
+}
+#endif
+
+#endif /* __ACPI_VIOT_H__ */
diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c
index be7da23fad76..b835ca702ff0 100644
--- a/drivers/acpi/bus.c
+++ b/drivers/acpi/bus.c
@@ -27,6 +27,7 @@
#include <linux/dmi.h>
#endif
#include <linux/acpi_iort.h>
+#include <linux/acpi_viot.h>
#include <linux/pci.h>
#include <acpi/apei.h>
#include <linux/suspend.h>
@@ -1339,6 +1340,7 @@ static int __init acpi_init(void)
pci_mmcfg_late_init();
acpi_iort_init();
acpi_scan_init();
+ acpi_viot_init();
acpi_ec_init();
acpi_debugfs_init();
acpi_sleep_proc_init();
diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index 696b81432ae7..574d657cf4bb 100644
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -9,6 +9,7 @@
#include <linux/kernel.h>
#include <linux/acpi.h>
#include <linux/acpi_iort.h>
+#include <linux/acpi_viot.h>
#include <linux/iommu.h>
#include <linux/signal.h>
#include <linux/kthread.h>
@@ -1555,6 +1556,8 @@ static const struct iommu_ops *acpi_iommu_configure_id(struct device *dev,
return ops;
err = iort_iommu_configure_id(dev, id_in);
+ if (err && err != -EPROBE_DEFER)
+ err = viot_iommu_configure(dev);
/*
* If we have reason to believe the IOMMU driver missed the initial
diff --git a/drivers/acpi/viot.c b/drivers/acpi/viot.c
new file mode 100644
index 000000000000..892cd9fa7b6d
--- /dev/null
+++ b/drivers/acpi/viot.c
@@ -0,0 +1,364 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Virtual I/O topology
+ *
+ * The Virtual I/O Translation Table (VIOT) describes the topology of
+ * para-virtual IOMMUs and the endpoints they manage. The OS uses it to
+ * initialize devices in the right order, preventing endpoints from issuing DMA
+ * before their IOMMU is ready.
+ *
+ * When binding a driver to a device, before calling the device driver's probe()
+ * method, the driver infrastructure calls dma_configure(). At that point the
+ * VIOT driver looks for an IOMMU associated to the device in the VIOT table.
+ * If an IOMMU exists and has been initialized, the VIOT driver initializes the
+ * device's IOMMU fwspec, allowing the DMA infrastructure to invoke the IOMMU
+ * ops when the device driver configures DMA mappings. If an IOMMU exists and
+ * hasn't yet been initialized, VIOT returns -EPROBE_DEFER to postpone probing
+ * the device until the IOMMU is available.
+ */
+#define pr_fmt(fmt) "ACPI: VIOT: " fmt
+
+#include <linux/acpi_viot.h>
+#include <linux/dma-iommu.h>
+#include <linux/fwnode.h>
+#include <linux/iommu.h>
+#include <linux/list.h>
+#include <linux/pci.h>
+#include <linux/platform_device.h>
+
+struct viot_iommu {
+ /* Node offset within the table */
+ unsigned int offset;
+ struct fwnode_handle *fwnode;
+ struct list_head list;
+};
+
+struct viot_endpoint {
+ union {
+ /* PCI range */
+ struct {
+ u16 segment_start;
+ u16 segment_end;
+ u16 bdf_start;
+ u16 bdf_end;
+ };
+ /* MMIO */
+ u64 address;
+ };
+ u32 endpoint_id;
+ struct viot_iommu *viommu;
+ struct list_head list;
+};
+
+static struct acpi_table_viot *viot;
+static LIST_HEAD(viot_iommus);
+static LIST_HEAD(viot_pci_ranges);
+static LIST_HEAD(viot_mmio_endpoints);
+
+static int __init viot_check_bounds(const struct acpi_viot_header *hdr)
+{
+ struct acpi_viot_header *start, *end, *hdr_end;
+
+ start = ACPI_ADD_PTR(struct acpi_viot_header, viot,
+ max_t(size_t, sizeof(*viot), viot->node_offset));
+ end = ACPI_ADD_PTR(struct acpi_viot_header, viot, viot->header.length);
+ hdr_end = ACPI_ADD_PTR(struct acpi_viot_header, hdr, sizeof(*hdr));
+
+ if (hdr < start || hdr_end > end) {
+ pr_err(FW_BUG "Node pointer overflows\n");
+ return -EOVERFLOW;
+ }
+ if (hdr->length < sizeof(*hdr)) {
+ pr_err(FW_BUG "Empty node\n");
+ return -EINVAL;
+ }
+ return 0;
+}
+
+static int __init viot_get_pci_iommu_fwnode(struct viot_iommu *viommu,
+ u16 segment, u16 bdf)
+{
+ struct pci_dev *pdev;
+ struct fwnode_handle *fwnode;
+
+ pdev = pci_get_domain_bus_and_slot(segment, PCI_BUS_NUM(bdf),
+ bdf & 0xff);
+ if (!pdev) {
+ pr_err("Could not find PCI IOMMU\n");
+ return -ENODEV;
+ }
+
+ fwnode = pdev->dev.fwnode;
+ if (!fwnode) {
+ /*
+ * PCI devices aren't necessarily described by ACPI. Create a
+ * fwnode so the IOMMU subsystem can identify this device.
+ */
+ fwnode = acpi_alloc_fwnode_static();
+ if (!fwnode) {
+ pci_dev_put(pdev);
+ return -ENOMEM;
+ }
+ set_primary_fwnode(&pdev->dev, fwnode);
+ }
+ viommu->fwnode = pdev->dev.fwnode;
+ pci_dev_put(pdev);
+ return 0;
+}
+
+static int __init viot_get_mmio_iommu_fwnode(struct viot_iommu *viommu,
+ u64 address)
+{
+ struct acpi_device *adev;
+ struct resource res = {
+ .start = address,
+ .end = address,
+ .flags = IORESOURCE_MEM,
+ };
+
+ adev = acpi_resource_consumer(&res);
+ if (!adev) {
+ pr_err("Could not find MMIO IOMMU\n");
+ return -EINVAL;
+ }
+ viommu->fwnode = &adev->fwnode;
+ return 0;
+}
+
+static struct viot_iommu * __init viot_get_iommu(unsigned int offset)
+{
+ int ret;
+ struct viot_iommu *viommu;
+ struct acpi_viot_header *hdr = ACPI_ADD_PTR(struct acpi_viot_header,
+ viot, offset);
+ union {
+ struct acpi_viot_virtio_iommu_pci pci;
+ struct acpi_viot_virtio_iommu_mmio mmio;
+ } *node = (void *)hdr;
+
+ list_for_each_entry(viommu, &viot_iommus, list)
+ if (viommu->offset == offset)
+ return viommu;
+
+ if (viot_check_bounds(hdr))
+ return NULL;
+
+ viommu = kzalloc(sizeof(*viommu), GFP_KERNEL);
+ if (!viommu)
+ return NULL;
+
+ viommu->offset = offset;
+ switch (hdr->type) {
+ case ACPI_VIOT_NODE_VIRTIO_IOMMU_PCI:
+ if (hdr->length < sizeof(node->pci))
+ goto err_free;
+
+ ret = viot_get_pci_iommu_fwnode(viommu, node->pci.segment,
+ node->pci.bdf);
+ break;
+ case ACPI_VIOT_NODE_VIRTIO_IOMMU_MMIO:
+ if (hdr->length < sizeof(node->mmio))
+ goto err_free;
+
+ ret = viot_get_mmio_iommu_fwnode(viommu,
+ node->mmio.base_address);
+ break;
+ default:
+ ret = -EINVAL;
+ }
+ if (ret)
+ goto err_free;
+
+ list_add(&viommu->list, &viot_iommus);
+ return viommu;
+
+err_free:
+ kfree(viommu);
+ return NULL;
+}
+
+static int __init viot_parse_node(const struct acpi_viot_header *hdr)
+{
+ int ret = -EINVAL;
+ struct list_head *list;
+ struct viot_endpoint *ep;
+ union {
+ struct acpi_viot_mmio mmio;
+ struct acpi_viot_pci_range pci;
+ } *node = (void *)hdr;
+
+ if (viot_check_bounds(hdr))
+ return -EINVAL;
+
+ if (hdr->type == ACPI_VIOT_NODE_VIRTIO_IOMMU_PCI ||
+ hdr->type == ACPI_VIOT_NODE_VIRTIO_IOMMU_MMIO)
+ return 0;
+
+ ep = kzalloc(sizeof(*ep), GFP_KERNEL);
+ if (!ep)
+ return -ENOMEM;
+
+ switch (hdr->type) {
+ case ACPI_VIOT_NODE_PCI_RANGE:
+ if (hdr->length < sizeof(node->pci)) {
+ pr_err(FW_BUG "Invalid PCI node size\n");
+ goto err_free;
+ }
+
+ ep->segment_start = node->pci.segment_start;
+ ep->segment_end = node->pci.segment_end;
+ ep->bdf_start = node->pci.bdf_start;
+ ep->bdf_end = node->pci.bdf_end;
+ ep->endpoint_id = node->pci.endpoint_start;
+ ep->viommu = viot_get_iommu(node->pci.output_node);
+ list = &viot_pci_ranges;
+ break;
+ case ACPI_VIOT_NODE_MMIO:
+ if (hdr->length < sizeof(node->mmio)) {
+ pr_err(FW_BUG "Invalid MMIO node size\n");
+ goto err_free;
+ }
+
+ ep->address = node->mmio.base_address;
+ ep->endpoint_id = node->mmio.endpoint;
+ ep->viommu = viot_get_iommu(node->mmio.output_node);
+ list = &viot_mmio_endpoints;
+ break;
+ default:
+ pr_warn("Unsupported node %x\n", hdr->type);
+ ret = 0;
+ goto err_free;
+ }
+
+ /*
+ * To be compatible with future versions of the table which may include
+ * other node types, keep parsing.
+ */
+ if (!ep->viommu) {
+ pr_warn("No IOMMU node found\n");
+ ret = 0;
+ goto err_free;
+ }
+
+ list_add(&ep->list, list);
+ return 0;
+
+err_free:
+ kfree(ep);
+ return ret;
+}
+
+/**
+ * acpi_viot_init - Parse the VIOT table
+ *
+ * Parse the VIOT table, prepare the list of endpoints to be used during DMA
+ * setup of devices.
+ */
+void __init acpi_viot_init(void)
+{
+ int i;
+ acpi_status status;
+ struct acpi_table_header *hdr;
+ struct acpi_viot_header *node;
+
+ status = acpi_get_table(ACPI_SIG_VIOT, 0, &hdr);
+ if (ACPI_FAILURE(status)) {
+ if (status != AE_NOT_FOUND) {
+ const char *msg = acpi_format_exception(status);
+
+ pr_err("Failed to get table, %s\n", msg);
+ }
+ return;
+ }
+
+ viot = (void *)hdr;
+
+ node = ACPI_ADD_PTR(struct acpi_viot_header, viot, viot->node_offset);
+ for (i = 0; i < viot->node_count; i++) {
+ if (viot_parse_node(node))
+ return;
+
+ node = ACPI_ADD_PTR(struct acpi_viot_header, node,
+ node->length);
+ }
+}
+
+static int viot_dev_iommu_init(struct device *dev, struct viot_iommu *viommu,
+ u32 epid)
+{
+ const struct iommu_ops *ops;
+
+ if (!viommu)
+ return -ENODEV;
+
+ /* We're not translating ourself */
+ if (viommu->fwnode == dev->fwnode)
+ return -EINVAL;
+
+ ops = iommu_ops_from_fwnode(viommu->fwnode);
+ if (!ops)
+ return IS_ENABLED(CONFIG_VIRTIO_IOMMU) ?
+ -EPROBE_DEFER : -ENODEV;
+
+ return acpi_iommu_fwspec_init(dev, epid, viommu->fwnode, ops);
+}
+
+static int viot_pci_dev_iommu_init(struct pci_dev *pdev, u16 dev_id, void *data)
+{
+ u32 epid;
+ struct viot_endpoint *ep;
+ u32 domain_nr = pci_domain_nr(pdev->bus);
+
+ list_for_each_entry(ep, &viot_pci_ranges, list) {
+ if (domain_nr >= ep->segment_start &&
+ domain_nr <= ep->segment_end &&
+ dev_id >= ep->bdf_start &&
+ dev_id <= ep->bdf_end) {
+ epid = ((domain_nr - ep->segment_start) << 16) +
+ dev_id - ep->bdf_start + ep->endpoint_id;
+
+ /*
+ * If we found a PCI range managed by the viommu, we're
+ * the one that has to request ACS.
+ */
+ pci_request_acs();
+
+ return viot_dev_iommu_init(&pdev->dev, ep->viommu,
+ epid);
+ }
+ }
+ return -ENODEV;
+}
+
+static int viot_mmio_dev_iommu_init(struct platform_device *pdev)
+{
+ struct resource *mem;
+ struct viot_endpoint *ep;
+
+ mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!mem)
+ return -ENODEV;
+
+ list_for_each_entry(ep, &viot_mmio_endpoints, list) {
+ if (ep->address == mem->start)
+ return viot_dev_iommu_init(&pdev->dev, ep->viommu,
+ ep->endpoint_id);
+ }
+ return -ENODEV;
+}
+
+/**
+ * viot_iommu_configure - Setup IOMMU ops for an endpoint described by VIOT
+ * @dev: the endpoint
+ *
+ * Return: 0 on success, <0 on failure
+ */
+int viot_iommu_configure(struct device *dev)
+{
+ if (dev_is_pci(dev))
+ return pci_for_each_dma_alias(to_pci_dev(dev),
+ viot_pci_dev_iommu_init, NULL);
+ else if (dev_is_platform(dev))
+ return viot_mmio_dev_iommu_init(to_platform_device(dev));
+ return -ENODEV;
+}
diff --git a/MAINTAINERS b/MAINTAINERS
index 503fd21901f1..9f06619f7e41 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -431,6 +431,14 @@ W: https://01.org/linux-acpi
B: https://bugzilla.kernel.org
F: drivers/acpi/acpi_video.c
+ACPI VIOT DRIVER
+M: Jean-Philippe Brucker <jean-philippe@linaro.org>
+L: linux-acpi@vger.kernel.org
+L: iommu@lists.linux-foundation.org
+S: Maintained
+F: drivers/acpi/viot.c
+F: include/linux/acpi_viot.h
+
ACPI WMI DRIVER
L: platform-driver-x86@vger.kernel.org
S: Orphan
--
2.31.1
_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu
^ permalink raw reply related [flat|nested] 11+ messages in thread* [PATCH v3 4/6] iommu/dma: Pass address limit rather than size to iommu_setup_dma_ops()
2021-06-02 15:44 [PATCH v3 0/6] Add support for ACPI VIOT Jean-Philippe Brucker
` (2 preceding siblings ...)
2021-06-02 15:44 ` [PATCH v3 3/6] ACPI: Add driver for the VIOT table Jean-Philippe Brucker
@ 2021-06-02 15:44 ` Jean-Philippe Brucker
2021-06-02 15:44 ` [PATCH v3 5/6] iommu/dma: Simplify calls " Jean-Philippe Brucker
2021-06-02 15:44 ` [PATCH v3 6/6] iommu/virtio: Enable x86 support Jean-Philippe Brucker
5 siblings, 0 replies; 11+ messages in thread
From: Jean-Philippe Brucker @ 2021-06-02 15:44 UTC (permalink / raw)
To: rjw, lenb, joro, mst
Cc: jean-philippe, kevin.tian, catalin.marinas, sudeep.holla,
robin.murphy, virtualization, linux-acpi, iommu, sebastien.boeuf,
guohanjun, will, dwmw2, linux-arm-kernel
Passing a 64-bit address width to iommu_setup_dma_ops() is valid on
virtual platforms, but isn't currently possible. The overflow check in
iommu_dma_init_domain() prevents this even when @dma_base isn't 0. Pass
a limit address instead of a size, so callers don't have to fake a size
to work around the check.
Signed-off-by: Jean-Philippe Brucker <jean-philippe@linaro.org>
---
include/linux/dma-iommu.h | 4 ++--
arch/arm64/mm/dma-mapping.c | 2 +-
drivers/iommu/amd/iommu.c | 2 +-
drivers/iommu/dma-iommu.c | 12 ++++++------
drivers/iommu/intel/iommu.c | 2 +-
5 files changed, 11 insertions(+), 11 deletions(-)
diff --git a/include/linux/dma-iommu.h b/include/linux/dma-iommu.h
index 6e75a2d689b4..758ca4694257 100644
--- a/include/linux/dma-iommu.h
+++ b/include/linux/dma-iommu.h
@@ -19,7 +19,7 @@ int iommu_get_msi_cookie(struct iommu_domain *domain, dma_addr_t base);
void iommu_put_dma_cookie(struct iommu_domain *domain);
/* Setup call for arch DMA mapping code */
-void iommu_setup_dma_ops(struct device *dev, u64 dma_base, u64 size);
+void iommu_setup_dma_ops(struct device *dev, u64 dma_base, u64 dma_limit);
/* The DMA API isn't _quite_ the whole story, though... */
/*
@@ -50,7 +50,7 @@ struct msi_msg;
struct device;
static inline void iommu_setup_dma_ops(struct device *dev, u64 dma_base,
- u64 size)
+ u64 dma_limit)
{
}
diff --git a/arch/arm64/mm/dma-mapping.c b/arch/arm64/mm/dma-mapping.c
index 4bf1dd3eb041..7bd1d2199141 100644
--- a/arch/arm64/mm/dma-mapping.c
+++ b/arch/arm64/mm/dma-mapping.c
@@ -50,7 +50,7 @@ void arch_setup_dma_ops(struct device *dev, u64 dma_base, u64 size,
dev->dma_coherent = coherent;
if (iommu)
- iommu_setup_dma_ops(dev, dma_base, size);
+ iommu_setup_dma_ops(dev, dma_base, size - dma_base - 1);
#ifdef CONFIG_XEN
if (xen_swiotlb_detect())
diff --git a/drivers/iommu/amd/iommu.c b/drivers/iommu/amd/iommu.c
index 3ac42bbdefc6..94b96d81fcfd 100644
--- a/drivers/iommu/amd/iommu.c
+++ b/drivers/iommu/amd/iommu.c
@@ -1713,7 +1713,7 @@ static void amd_iommu_probe_finalize(struct device *dev)
/* Domains are initialized for this device - have a look what we ended up with */
domain = iommu_get_domain_for_dev(dev);
if (domain->type == IOMMU_DOMAIN_DMA)
- iommu_setup_dma_ops(dev, IOVA_START_PFN << PAGE_SHIFT, 0);
+ iommu_setup_dma_ops(dev, IOVA_START_PFN << PAGE_SHIFT, U64_MAX);
else
set_dma_ops(dev, NULL);
}
diff --git a/drivers/iommu/dma-iommu.c b/drivers/iommu/dma-iommu.c
index 7bcdd1205535..c62e19bed302 100644
--- a/drivers/iommu/dma-iommu.c
+++ b/drivers/iommu/dma-iommu.c
@@ -319,16 +319,16 @@ static bool dev_is_untrusted(struct device *dev)
* iommu_dma_init_domain - Initialise a DMA mapping domain
* @domain: IOMMU domain previously prepared by iommu_get_dma_cookie()
* @base: IOVA at which the mappable address space starts
- * @size: Size of IOVA space
+ * @limit: Last address of the IOVA space
* @dev: Device the domain is being initialised for
*
- * @base and @size should be exact multiples of IOMMU page granularity to
+ * @base and @limit + 1 should be exact multiples of IOMMU page granularity to
* avoid rounding surprises. If necessary, we reserve the page at address 0
* to ensure it is an invalid IOVA. It is safe to reinitialise a domain, but
* any change which could make prior IOVAs invalid will fail.
*/
static int iommu_dma_init_domain(struct iommu_domain *domain, dma_addr_t base,
- u64 size, struct device *dev)
+ dma_addr_t limit, struct device *dev)
{
struct iommu_dma_cookie *cookie = domain->iova_cookie;
unsigned long order, base_pfn;
@@ -346,7 +346,7 @@ static int iommu_dma_init_domain(struct iommu_domain *domain, dma_addr_t base,
/* Check the domain allows at least some access to the device... */
if (domain->geometry.force_aperture) {
if (base > domain->geometry.aperture_end ||
- base + size <= domain->geometry.aperture_start) {
+ limit < domain->geometry.aperture_start) {
pr_warn("specified DMA range outside IOMMU capability\n");
return -EFAULT;
}
@@ -1308,7 +1308,7 @@ static const struct dma_map_ops iommu_dma_ops = {
* The IOMMU core code allocates the default DMA domain, which the underlying
* IOMMU driver needs to support via the dma-iommu layer.
*/
-void iommu_setup_dma_ops(struct device *dev, u64 dma_base, u64 size)
+void iommu_setup_dma_ops(struct device *dev, u64 dma_base, u64 dma_limit)
{
struct iommu_domain *domain = iommu_get_domain_for_dev(dev);
@@ -1320,7 +1320,7 @@ void iommu_setup_dma_ops(struct device *dev, u64 dma_base, u64 size)
* underlying IOMMU driver needs to support via the dma-iommu layer.
*/
if (domain->type == IOMMU_DOMAIN_DMA) {
- if (iommu_dma_init_domain(domain, dma_base, size, dev))
+ if (iommu_dma_init_domain(domain, dma_base, dma_limit, dev))
goto out_err;
dev->dma_ops = &iommu_dma_ops;
}
diff --git a/drivers/iommu/intel/iommu.c b/drivers/iommu/intel/iommu.c
index be35284a2016..85f18342603c 100644
--- a/drivers/iommu/intel/iommu.c
+++ b/drivers/iommu/intel/iommu.c
@@ -5171,7 +5171,7 @@ static void intel_iommu_probe_finalize(struct device *dev)
if (domain && domain->type == IOMMU_DOMAIN_DMA)
iommu_setup_dma_ops(dev, base,
- __DOMAIN_MAX_ADDR(dmar_domain->gaw) - base);
+ __DOMAIN_MAX_ADDR(dmar_domain->gaw));
else
set_dma_ops(dev, NULL);
}
--
2.31.1
_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu
^ permalink raw reply related [flat|nested] 11+ messages in thread* [PATCH v3 5/6] iommu/dma: Simplify calls to iommu_setup_dma_ops()
2021-06-02 15:44 [PATCH v3 0/6] Add support for ACPI VIOT Jean-Philippe Brucker
` (3 preceding siblings ...)
2021-06-02 15:44 ` [PATCH v3 4/6] iommu/dma: Pass address limit rather than size to iommu_setup_dma_ops() Jean-Philippe Brucker
@ 2021-06-02 15:44 ` Jean-Philippe Brucker
2021-06-02 15:44 ` [PATCH v3 6/6] iommu/virtio: Enable x86 support Jean-Philippe Brucker
5 siblings, 0 replies; 11+ messages in thread
From: Jean-Philippe Brucker @ 2021-06-02 15:44 UTC (permalink / raw)
To: rjw, lenb, joro, mst
Cc: jean-philippe, kevin.tian, catalin.marinas, sudeep.holla,
robin.murphy, virtualization, linux-acpi, iommu, sebastien.boeuf,
guohanjun, will, dwmw2, linux-arm-kernel
dma-iommu uses the address bounds described in domain->geometry during
IOVA allocation. The address size parameters of iommu_setup_dma_ops()
are useful for describing additional limits set by the platform
firmware, but aren't needed for drivers that call this function from
probe_finalize(). The base parameter can be zero because dma-iommu
already removes the first IOVA page, and the limit parameter can be
U64_MAX because it's only checked against the domain geometry. Simplify
calls to iommu_setup_dma_ops().
Signed-off-by: Jean-Philippe Brucker <jean-philippe@linaro.org>
---
drivers/iommu/amd/iommu.c | 9 +--------
drivers/iommu/dma-iommu.c | 4 +++-
drivers/iommu/intel/iommu.c | 10 +---------
3 files changed, 5 insertions(+), 18 deletions(-)
diff --git a/drivers/iommu/amd/iommu.c b/drivers/iommu/amd/iommu.c
index 94b96d81fcfd..d3123bc05c08 100644
--- a/drivers/iommu/amd/iommu.c
+++ b/drivers/iommu/amd/iommu.c
@@ -1708,14 +1708,7 @@ static struct iommu_device *amd_iommu_probe_device(struct device *dev)
static void amd_iommu_probe_finalize(struct device *dev)
{
- struct iommu_domain *domain;
-
- /* Domains are initialized for this device - have a look what we ended up with */
- domain = iommu_get_domain_for_dev(dev);
- if (domain->type == IOMMU_DOMAIN_DMA)
- iommu_setup_dma_ops(dev, IOVA_START_PFN << PAGE_SHIFT, U64_MAX);
- else
- set_dma_ops(dev, NULL);
+ iommu_setup_dma_ops(dev, 0, U64_MAX);
}
static void amd_iommu_release_device(struct device *dev)
diff --git a/drivers/iommu/dma-iommu.c b/drivers/iommu/dma-iommu.c
index c62e19bed302..175f8eaeb5b3 100644
--- a/drivers/iommu/dma-iommu.c
+++ b/drivers/iommu/dma-iommu.c
@@ -1322,7 +1322,9 @@ void iommu_setup_dma_ops(struct device *dev, u64 dma_base, u64 dma_limit)
if (domain->type == IOMMU_DOMAIN_DMA) {
if (iommu_dma_init_domain(domain, dma_base, dma_limit, dev))
goto out_err;
- dev->dma_ops = &iommu_dma_ops;
+ set_dma_ops(dev, &iommu_dma_ops);
+ } else {
+ set_dma_ops(dev, NULL);
}
return;
diff --git a/drivers/iommu/intel/iommu.c b/drivers/iommu/intel/iommu.c
index 85f18342603c..8d866940692a 100644
--- a/drivers/iommu/intel/iommu.c
+++ b/drivers/iommu/intel/iommu.c
@@ -5165,15 +5165,7 @@ static void intel_iommu_release_device(struct device *dev)
static void intel_iommu_probe_finalize(struct device *dev)
{
- dma_addr_t base = IOVA_START_PFN << VTD_PAGE_SHIFT;
- struct iommu_domain *domain = iommu_get_domain_for_dev(dev);
- struct dmar_domain *dmar_domain = to_dmar_domain(domain);
-
- if (domain && domain->type == IOMMU_DOMAIN_DMA)
- iommu_setup_dma_ops(dev, base,
- __DOMAIN_MAX_ADDR(dmar_domain->gaw));
- else
- set_dma_ops(dev, NULL);
+ iommu_setup_dma_ops(dev, 0, U64_MAX);
}
static void intel_iommu_get_resv_regions(struct device *device,
--
2.31.1
_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu
^ permalink raw reply related [flat|nested] 11+ messages in thread* [PATCH v3 6/6] iommu/virtio: Enable x86 support
2021-06-02 15:44 [PATCH v3 0/6] Add support for ACPI VIOT Jean-Philippe Brucker
` (4 preceding siblings ...)
2021-06-02 15:44 ` [PATCH v3 5/6] iommu/dma: Simplify calls " Jean-Philippe Brucker
@ 2021-06-02 15:44 ` Jean-Philippe Brucker
5 siblings, 0 replies; 11+ messages in thread
From: Jean-Philippe Brucker @ 2021-06-02 15:44 UTC (permalink / raw)
To: rjw, lenb, joro, mst
Cc: jean-philippe, kevin.tian, catalin.marinas, sudeep.holla,
robin.murphy, virtualization, linux-acpi, iommu, sebastien.boeuf,
guohanjun, will, dwmw2, linux-arm-kernel
With the VIOT support in place, x86 platforms can now use the
virtio-iommu.
Because the other x86 IOMMU drivers aren't yet ready to use the
acpi_dma_setup() path, x86 doesn't implement arch_setup_dma_ops() at the
moment. Similarly to Vt-d and AMD IOMMU, call iommu_setup_dma_ops() from
probe_finalize().
Acked-by: Joerg Roedel <jroedel@suse.de>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Jean-Philippe Brucker <jean-philippe@linaro.org>
---
drivers/iommu/Kconfig | 3 ++-
drivers/iommu/dma-iommu.c | 1 +
drivers/iommu/virtio-iommu.c | 8 ++++++++
3 files changed, 11 insertions(+), 1 deletion(-)
diff --git a/drivers/iommu/Kconfig b/drivers/iommu/Kconfig
index aff8a4830dd1..07b7c25cbed8 100644
--- a/drivers/iommu/Kconfig
+++ b/drivers/iommu/Kconfig
@@ -400,8 +400,9 @@ config HYPERV_IOMMU
config VIRTIO_IOMMU
tristate "Virtio IOMMU driver"
depends on VIRTIO
- depends on ARM64
+ depends on (ARM64 || X86)
select IOMMU_API
+ select IOMMU_DMA
select INTERVAL_TREE
select ACPI_VIOT if ACPI
help
diff --git a/drivers/iommu/dma-iommu.c b/drivers/iommu/dma-iommu.c
index 175f8eaeb5b3..46ed43c400cf 100644
--- a/drivers/iommu/dma-iommu.c
+++ b/drivers/iommu/dma-iommu.c
@@ -1332,6 +1332,7 @@ void iommu_setup_dma_ops(struct device *dev, u64 dma_base, u64 dma_limit)
pr_warn("Failed to set up IOMMU for device %s; retaining platform DMA ops\n",
dev_name(dev));
}
+EXPORT_SYMBOL_GPL(iommu_setup_dma_ops);
static struct iommu_dma_msi_page *iommu_dma_get_msi_page(struct device *dev,
phys_addr_t msi_addr, struct iommu_domain *domain)
diff --git a/drivers/iommu/virtio-iommu.c b/drivers/iommu/virtio-iommu.c
index 218fe8560e8d..77aee1207ced 100644
--- a/drivers/iommu/virtio-iommu.c
+++ b/drivers/iommu/virtio-iommu.c
@@ -1026,6 +1026,13 @@ static struct iommu_device *viommu_probe_device(struct device *dev)
return ERR_PTR(ret);
}
+static void viommu_probe_finalize(struct device *dev)
+{
+#ifndef CONFIG_ARCH_HAS_SETUP_DMA_OPS
+ iommu_setup_dma_ops(dev, 0, U64_MAX);
+#endif
+}
+
static void viommu_release_device(struct device *dev)
{
struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev);
@@ -1062,6 +1069,7 @@ static struct iommu_ops viommu_ops = {
.iova_to_phys = viommu_iova_to_phys,
.iotlb_sync = viommu_iotlb_sync,
.probe_device = viommu_probe_device,
+ .probe_finalize = viommu_probe_finalize,
.release_device = viommu_release_device,
.device_group = viommu_device_group,
.get_resv_regions = viommu_get_resv_regions,
--
2.31.1
_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu
^ permalink raw reply related [flat|nested] 11+ messages in thread