From: Jim Quinlan <james.quinlan@broadcom.com>
To: linux-pci@vger.kernel.org,
Nicolas Saenz Julienne <nsaenzjulienne@suse.de>,
Christoph Hellwig <hch@lst.de>,
Robin Murphy <robin.murphy@arm.com>,
bcm-kernel-feedback-list@broadcom.com,
james.quinlan@broadcom.com
Cc: Alan Stern <stern@rowland.harvard.edu>,
Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
Arnd Bergmann <arnd@arndb.de>,
devel@driverdev.osuosl.org (open list:STAGING SUBSYSTEM),
devicetree@vger.kernel.org (open list:OPEN FIRMWARE AND
FLATTENED DEVICE TREE),
dri-devel@lists.freedesktop.org (open list:DRM DRIVERS FOR
ALLWINNER A10), Florian Fainelli <f.fainelli@gmail.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Hans de Goede <hdegoede@redhat.com>,
Heikki Krogerus <heikki.krogerus@linux.intel.com>,
"H. Peter Anvin" <hpa@zytor.com>,
iommu@lists.linux-foundation.org (open list:IOMMU DRIVERS),
Jean-Philippe Brucker <jean-philippe@linaro.org>,
Jens Axboe <axboe@kernel.dk>, Joerg Roedel <jroedel@suse.de>,
Julien Grall <julien.grall@arm.com>,
linux-acpi@vger.kernel.org (open list:ACPI FOR ARM64
(ACPI/arm64)),
linux-arm-kernel@lists.infradead.org (moderated list:ARM PORT),
linux-ide@vger.kernel.org (open list:LIBATA SUBSYSTEM (Serial
and Parallel ATA drivers)),
linux-kernel@vger.kernel.org (open list),
linux-media@vger.kernel.org (open list:ALLWINNER A10 CSI DRIVER),
linux-remoteproc@vger.kernel.org (open list:REMOTE PROCESSOR
(REMOTEPROC) SUBSYSTEM),
linux-rpi-kernel@lists.infradead.org (moderated list:BROADCOM
BCM2711/BCM2835 ARM ARCHITECTURE),
linux-sh@vger.kernel.org (open list:SUPERH),
linux-usb@vger.kernel.org (open list:USB SUBSYSTEM),
Oliver Neukum <oneukum@suse.com>,
"Rafael J. Wysocki" <rafael.j.wysocki@intel.com>,
Rob Herring <robh@kernel.org>,
Saravana Kannan <saravanak@google.com>,
Stefano Stabellini <sstabellini@kernel.org>,
Suzuki K Poulose <suzuki.poulose@arm.com>
Subject: [PATCH v9 00/12] PCI: brcmstb: enable PCIe for STB chips
Date: Fri, 24 Jul 2020 16:33:42 -0400 [thread overview]
Message-ID: <20200724203407.16972-1-james.quinlan@broadcom.com> (raw)
Patchset Summary:
Enhance a PCIe host controller driver. Because of its unusual design
we are foced to change dev->dma_pfn_offset into a more general role
allowing multiple offsets. See the 'v1' notes below for more info.
NOTE: ChristophH wanted the dma_set_offset_range() function
to have a range from [0...~(phys_addr_t)0], i.e. no specific
bounds. RobinM requested this function to have specific bounds,
which has been implemented since v6. If I do not hear from
Robin in the near future about this request, I will submit
v10 which will have no specific bounds.
v9:
Commit: "device core: Introduce DMA range map, supplanting ..."
-- A number of code improvements were implemented as suggested by
ChristophH. Unfortunately, some of these changes reversed the
implemented suggestions of other reviewers; for example, the new
macros PFN_DMA_ADDR(), DMA_ADDR_PFN() have been pulled.
v8:
Commit: "device core: Introduce DMA range map, supplanting ..."
-- To satisfy a specific m68 compile configuration, I moved the 'struct
bus_dma_region; definition out of #ifdef CONFIG_HAS_DMA and also defined
three inline functions for !CONFIG_HAS_DMA (kernel test robot).
-- The sunXi drivers -- suc4i_csi, sun6i_csi, cedrus_hw -- set
a pfn_offset outside of_dma_configure() but the code offers no
insight on the size of the translation window. V7 had me using
SIZE_MAX as the size. I have since contacted the sunXi maintainer and
he said that using a size of SZ_4G would cover sunXi configurations.
v7:
Commit: "device core: Introduce DMA range map, supplanting ..."
-- remove second kcalloc/copy in device.c (AndyS)
-- use PTR_ERR_OR_ZERO() and PHYS_PFN() (AndyS)
-- indentation, sizeof(struct ...) => sizeof(*r) (AndyS)
-- add pfn.h definitions: PFN_DMA_ADDR(), DMA_ADDR_PFN() (AndyS)
-- Fixed compile error in "sun6i_csi.c" (kernel test robot)
Commit "ata: ahci_brcm: Fix use of BCM7216 reset controller"
-- correct name of function in the commit msg (SergeiS)
v6:
Commit "device core: Introduce DMA range map":
-- of_dma_get_range() now takes a single argument and returns either
NULL, a valid map, or an ERR_PTR. (Robin)
-- offsets are no longer a PFN value but an actual address. (Robin)
-- the bus_dma_region struct stores the range size instead of
the cpu_end and pci_end values. (Robin)
-- devices that were setting a single offset with no boundaries
have been modified to have boundaries; in a few places
where this information was unavilable a /* FIXME: ... */
comment was added. (Robin)
-- dma_attach_offset_range() can be called when an offset
map already exists; if it's range is already present
nothing is done and success is returned. (Robin)
All commits:
-- Man name/style/corrections/etc changed (Bjorn)
-- rebase to Torvalds master
v5:
Commit "device core: Introduce multiple dma pfn offsets"
-- in of/address.c: "map_size = 0" => "*map_size = 0"
-- use kcalloc instead of kzalloc (AndyS)
-- use PHYS_ADDR_MAX instead of "~(phys_addr_t)0"
Commit "PCI: brcmstb: Set internal memory viewport sizes"
-- now gives error on missing dma-ranges property.
Commit "dt-bindings: PCI: Add bindings for more Brcmstb chips"
-- removed "Allof:" from brcm,scb-sizes definition (RobH)
All Commits:
-- indentation style, use max chars 100 (AndyS)
-- rebased to torvalds master
v4:
Commit "device core: Introduce multiple dma pfn offsets"
-- of_dma_get_range() does not take a dev param but instead
takes two "out" params: map and map_size. We do this so
that the code that parses dma-ranges is separate from
the code that modifies 'dev'. (Nicolas)
-- the separate case of having a single pfn offset has
been removed and is now processed by going through the
map array. (Nicolas)
-- move attach_uniform_dma_pfn_offset() from of/address.c to
dma/mapping.c so that it does not depend on CONFIG_OF. (Nicolas)
-- devm_kcalloc => devm_kzalloc (DanC)
-- add/fix assignment to dev->dma_pfn_offset_map for func
attach_uniform_dma_pfn_offset() (DanC, Nicolas)
-- s/struct dma_pfn_offset_region/struct bus_dma_region/ (Nicolas)
-- s/attach_uniform_dma_pfn_offset/dma_attach_uniform_pfn_offset/
-- s/attach_dma_pfn_offset_map/dma_attach_pfn_offset_map/
-- More use of PFN_{PHYS,DOWN,UP}. (AndyS)
Commit "of: Include a dev param in of_dma_get_range()"
-- this commit was sqaushed with "device core: Introduce ..."
v3:
Commit "device core: Introduce multiple dma pfn offsets"
Commit "arm: dma-mapping: Invoke dma offset func if needed"
-- The above two commits have been squashed. More importantly,
the code has been modified so that the functionality for
multiple pfn offsets subsumes the use of dev->dma_pfn_offset.
In fact, dma_pfn_offset is removed and supplanted by
dma_pfn_offset_map, which is a pointer to an array. The
more common case of a uniform offset is now handled as
a map with a single entry, while cases requiring multiple
pfn offsets use a map with multiple entries. Code paths
that used to do this:
dev->dma_pfn_offset = mydrivers_pfn_offset;
have been changed to do this:
attach_uniform_dma_pfn_offset(dev, pfn_offset);
Commit "dt-bindings: PCI: Add bindings for more Brcmstb chips"
-- Add if/then clause for required props: resets, reset-names (RobH)
-- Change compatible list from const to enum (RobH)
-- Change list of u32-tuples to u64 (RobH)
Commit "of: Include a dev param in of_dma_get_range()"
-- modify of/unittests.c to add NULL param in of_dma_get_range() call.
Commit "device core: Add ability to handle multiple dma offsets"
-- align comment in device.h (AndyS).
-- s/cpu_beg/cpu_start/ and s/dma_beg/dma_start/ in struct
dma_pfn_offset_region (AndyS).
v2:
Commit: "device core: Add ability to handle multiple dma offsets"
o Added helper func attach_dma_pfn_offset_map() in address.c (Chistoph)
o Helpers funcs added to __phys_to_dma() & __dma_to_phys() (Christoph)
o Added warning when multiple offsets are needed and !DMA_PFN_OFFSET_MAP
o dev->dma_pfn_map => dev->dma_pfn_offset_map
o s/frm/from/ for dma_pfn_offset_frm_{phys,dma}_addr() (Christoph)
o In device.h: s/const void */const struct dma_pfn_offset_region */
o removed 'unlikely' from unlikely(dev->dma_pfn_offset_map) since
guarded by CONFIG_DMA_PFN_OFFSET_MAP (Christoph)
o Since dev->dma_pfn_offset is copied in usb/core/{usb,message}.c, now
dev->dma_pfn_offset_map is copied as well.
o Merged two of the DMA commits into one (Christoph).
Commit "arm: dma-mapping: Invoke dma offset func if needed":
o Use helper functions instead of #if CONFIG_DMA_PFN_OFFSET
Other commits' changes:
o Removed need for carrying of_id var in priv (Nicolas)
o Commit message rewordings (Bjorn)
o Commit log messages filled to 75 chars (Bjorn)
o devm_reset_control_get_shared())
=> devm_reset_control_get_optional_shared (Philipp)
o Add call to reset_control_assert() in PCIe remove routines (Philipp)
v1:
This patchset expands the usefulness of the Broadcom Settop Box PCIe
controller by building upon the PCIe driver used currently by the
Raspbery Pi. Other forms of this patchset were submitted by me years
ago and not accepted; the major sticking point was the code required
for the DMA remapping needed for the PCIe driver to work [1].
There have been many changes to the DMA and OF subsystems since that
time, making a cleaner and less intrusive patchset possible. This
patchset implements a generalization of "dev->dma_pfn_offset", except
that instead of a single scalar offset it provides for multiple
offsets via a function which depends upon the "dma-ranges" property of
the PCIe host controller. This is required for proper functionality
of the BrcmSTB PCIe controller and possibly some other devices.
[1] https://lore.kernel.org/linux-arm-kernel/1516058925-46522-5-git-send-email-jim2101024@gmail.com/
Jim Quinlan (12):
PCI: brcmstb: PCIE_BRCMSTB depends on ARCH_BRCMSTB
ata: ahci_brcm: Fix use of BCM7216 reset controller
dt-bindings: PCI: Add bindings for more Brcmstb chips
PCI: brcmstb: Add bcm7278 register info
PCI: brcmstb: Add suspend and resume pm_ops
PCI: brcmstb: Add bcm7278 PERST# support
PCI: brcmstb: Add control of rescal reset
device core: Introduce DMA range map, supplanting dma_pfn_offset
PCI: brcmstb: Set additional internal memory DMA viewport sizes
PCI: brcmstb: Accommodate MSI for older chips
PCI: brcmstb: Set bus max burst size by chip type
PCI: brcmstb: Add bcm7211, bcm7216, bcm7445, bcm7278 to match list
.../bindings/pci/brcm,stb-pcie.yaml | 56 ++-
arch/arm/include/asm/dma-mapping.h | 10 +-
arch/arm/mach-keystone/keystone.c | 17 +-
arch/sh/drivers/pci/pcie-sh7786.c | 9 +-
arch/sh/kernel/dma-coherent.c | 15 +-
arch/x86/pci/sta2x11-fixup.c | 7 +-
drivers/acpi/arm64/iort.c | 5 +-
drivers/ata/ahci_brcm.c | 11 +-
drivers/gpu/drm/sun4i/sun4i_backend.c | 5 +-
drivers/iommu/io-pgtable-arm.c | 2 +-
.../platform/sunxi/sun4i-csi/sun4i_csi.c | 5 +-
.../platform/sunxi/sun6i-csi/sun6i_csi.c | 4 +-
drivers/of/address.c | 71 ++-
drivers/of/device.c | 43 +-
drivers/of/of_private.h | 10 +-
drivers/of/unittest.c | 32 +-
drivers/pci/controller/Kconfig | 3 +-
drivers/pci/controller/pcie-brcmstb.c | 409 +++++++++++++++---
drivers/remoteproc/remoteproc_core.c | 2 +-
.../staging/media/sunxi/cedrus/cedrus_hw.c | 7 +-
drivers/usb/core/message.c | 4 +-
drivers/usb/core/usb.c | 2 +-
include/linux/device.h | 4 +-
include/linux/dma-direct.h | 8 +-
include/linux/dma-mapping.h | 34 ++
kernel/dma/coherent.c | 10 +-
kernel/dma/mapping.c | 63 +++
27 files changed, 653 insertions(+), 195 deletions(-)
--
2.17.1
next reply other threads:[~2020-07-24 20:45 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-24 20:33 Jim Quinlan [this message]
2020-07-24 20:33 ` [PATCH v9 01/12] PCI: brcmstb: PCIE_BRCMSTB depends on ARCH_BRCMSTB Jim Quinlan
2020-07-24 20:33 ` [PATCH v9 02/12] ata: ahci_brcm: Fix use of BCM7216 reset controller Jim Quinlan
2020-07-24 21:02 ` Florian Fainelli
2020-07-25 9:18 ` Sergei Shtylyov
2020-07-27 6:58 ` Philipp Zabel
2020-07-24 20:33 ` [PATCH v9 03/12] dt-bindings: PCI: Add bindings for more Brcmstb chips Jim Quinlan
2020-07-24 20:33 ` [PATCH v9 04/12] PCI: brcmstb: Add bcm7278 register info Jim Quinlan
2020-07-24 20:33 ` [PATCH v9 05/12] PCI: brcmstb: Add suspend and resume pm_ops Jim Quinlan
2020-07-24 20:33 ` [PATCH v9 06/12] PCI: brcmstb: Add bcm7278 PERST# support Jim Quinlan
2020-07-24 20:33 ` [PATCH v9 07/12] PCI: brcmstb: Add control of rescal reset Jim Quinlan
2020-07-24 20:33 ` [PATCH v9 09/12] PCI: brcmstb: Set additional internal memory DMA viewport sizes Jim Quinlan
2020-08-01 17:39 ` Nicolas Saenz Julienne
2020-08-03 12:40 ` Jim Quinlan
2020-07-24 20:33 ` [PATCH v9 10/12] PCI: brcmstb: Accommodate MSI for older chips Jim Quinlan
2020-07-24 20:33 ` [PATCH v9 11/12] PCI: brcmstb: Set bus max burst size by chip type Jim Quinlan
2020-07-24 20:33 ` [PATCH v9 12/12] PCI: brcmstb: Add bcm7211, bcm7216, bcm7445, bcm7278 to match list Jim Quinlan
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20200724203407.16972-1-james.quinlan@broadcom.com \
--to=james.quinlan@broadcom.com \
--cc=andriy.shevchenko@linux.intel.com \
--cc=arnd@arndb.de \
--cc=axboe@kernel.dk \
--cc=bcm-kernel-feedback-list@broadcom.com \
--cc=devel@driverdev.osuosl.org \
--cc=devicetree@vger.kernel.org \
--cc=dri-devel@lists.freedesktop.org \
--cc=f.fainelli@gmail.com \
--cc=gregkh@linuxfoundation.org \
--cc=hch@lst.de \
--cc=hdegoede@redhat.com \
--cc=heikki.krogerus@linux.intel.com \
--cc=hpa@zytor.com \
--cc=iommu@lists.linux-foundation.org \
--cc=jean-philippe@linaro.org \
--cc=jroedel@suse.de \
--cc=julien.grall@arm.com \
--cc=linux-acpi@vger.kernel.org \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-ide@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-media@vger.kernel.org \
--cc=linux-pci@vger.kernel.org \
--cc=linux-remoteproc@vger.kernel.org \
--cc=linux-rpi-kernel@lists.infradead.org \
--cc=linux-sh@vger.kernel.org \
--cc=linux-usb@vger.kernel.org \
--cc=nsaenzjulienne@suse.de \
--cc=oneukum@suse.com \
--cc=rafael.j.wysocki@intel.com \
--cc=robh@kernel.org \
--cc=robin.murphy@arm.com \
--cc=saravanak@google.com \
--cc=sstabellini@kernel.org \
--cc=stern@rowland.harvard.edu \
--cc=suzuki.poulose@arm.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).