[PATCHv7 00/17] PCIe support for the Armada 370 and Armada XP SoCs
Thomas Petazzoni
thomas.petazzoni at free-electrons.com
Wed Apr 3 23:27:12 EST 2013
Bjorn, Rob, Grant, Russell,
Through this e-mail, I'd like to send you a kind reminder about this
patch series. The latest version has been sent a week ago, and there
has been only minor changes requested since v4 sent early March, i.e a
month ago. Therefore, I would hope for this series to enter 3.10.
But this patch set is touching areas you are the maintainer for, so I
would appreciate if you could do a formal review and give your comments
or your Ack. I would especially appreciate if you do so in the very
near future, so that if there are comments, I'll have the time to fix
them and resubmit and updated version in time.
Here are the patches, classified by maintainer area:
* For Grant Likely and Rob Herring, the drivers/of patches:
[PATCHv7 01/17] of/pci: Provide support for parsing PCI DT ranges property
http://lists.infradead.org/pipermail/linux-arm-kernel/2013-March/158556.html
this patch has been around since 3 months now, and has seen a
number of iterations, first from Thierry Reding, and then by
Andrew Murray. It is also used by Thierry Reding's PCIe driver,
and possibly by the upcoming Exynos PCIe driver as well.
[PATCHv7 02/17] of/pci: Add of_pci_get_devfn() function
http://lists.infradead.org/pipermail/linux-arm-kernel/2013-March/158550.html
this patch has been around since 3 months, with no major change
since then.
[PATCHv7 03/17] of/pci: Add of_pci_parse_bus_range() function
http://lists.infradead.org/pipermail/linux-arm-kernel/2013-March/158551.html
same thing.
* For Bjorn Helgaas, the drivers/pci/ patches:
[PATCHv7 04/17] pci: infrastructure to add drivers in drivers/pci/host
http://lists.infradead.org/pipermail/linux-arm-kernel/2013-March/158552.html
[PATCHv7 08/17] pci: PCIe driver for Marvell Armada 370/XP systems
http://lists.infradead.org/pipermail/linux-arm-kernel/2013-March/158566.html
* For Russell King, the arch/arm/kernel/ patch:
[PATCHv7 05/17] arm: pci: add a align_resource hook
http://lists.infradead.org/pipermail/linux-arm-kernel/2013-March/158553.html
this patch has been around for more than two months now, and has
been submitted last week to the patch tracking system, at
http://www.arm.linux.org.uk/developer/patches/viewpatch.php?id=7683/1.
For more details, see the cover letter below, or of course, do not
hesitate to request for additional ones as needed.
Thanks a lot for your support,
Thomas
On Wed, 27 Mar 2013 15:40:17 +0100, Thomas Petazzoni wrote:
> Hello,
>
> This series of patches introduces PCIe support for the Marvell Armada
> 370 and Armada XP. In the future, we plan to extend the driver to
> cover Kirkwood platforms, and possibly other Marvell EBU platforms as
> well.
>
> As we are approaching 3.10, I would now like to get formal Acked-by,
> or disagreements from the following maintainers/developers :
>
> * Grant Likely, as the OF maintainer, for patches 1, 2 and 3
>
> [PATCH v5 01/17] of/pci: Provide support for parsing PCI DT ranges
> [PATCH v5 02/17] of/pci: Add of_pci_get_devfn() function
> [PATCH v5 03/17] of/pci: Add of_pci_parse_bus_range() function
>
> * Bjorn Helgaas, as the PCI maintainer, for patches 4 and 8
>
> [PATCH v5 04/17] pci: infrastructure to add drivers in drivers/pci/host
> [PATCH v5 08/17] pci: PCIe driver for Marvell Armada 370/XP systems
>
> * Russell King, as the ARM maintainer, for patch 5
>
> [PATCH v5 05/17] arm: pci: add a align_resource hook
>
> * Arnd Bergmann, Mitch Bradley and Jason Gunthorpe, for patch 8 (the
> PCIe driver itself), and specifically the Device Tree binding.
>
> [PATCH v5 08/17] pci: PCIe driver for Marvell Armada 370/XP systems
>
> This patch set depends on:
>
> * The arm-soc/mvebu/cleanup branch in Arnd and Olof arm-soc tree
>
> * [PATCH v3 for 3.10] Introduce a Marvell EBU MBus driver
> http://lists.infradead.org/pipermail/linux-arm-kernel/2013-March/156883.html
>
> For easier testing, the code has been pushed to:
>
> git://github.com/MISL-EBU-System-SW/mainline-public.git marvell-pcie-v7
>
> This PATCHv7 follows:
> * PATCHv6, sent on March, 26st 2013
> * PATCHv5, sent on March, 21st 2013
> * PATCHv4, sent on March, 8th 2013
> * PATCHv3, sent on February, 12th 2013
> * PATCHv2, sent on January, 28th 2013
> * RFCv1, sent on December, 7th 2012
>
> Changes between v6 and v7:
>
> * Use assigned-addresses in the DT subnodes for the MMIO PCIe
> registers, in order to align with what Thierry is doing on the
> Tegra PCIe driver.
>
> * Added empty 'ranges;' properties in the subnodes, as requested by
> Arnd. Note that due to this, it is not possible to remove the
> #address-cells and #size-cells properties from the subnodes, as
> Jason Gunthorpe requested, otherwise the DT compiler complains with:
>
> Warning (ranges_format): /soc/pcie-controller/pcie at 1,0 has empty
> "ranges" property but its #address-cells (2) differs from
> /soc/pcie-controller (3)
>
> Warning (ranges_format): /soc/pcie-controller/pcie at 1,0 has empty
> "ranges" property but its #size-cells (1) differs from
> /soc/pcie-controller (2)
>
> * Use the new RFCv3 patch from Andrew Murray for 'of/pci: Provide
> support for parsing PCI DT ranges property'.
>
> * Updated the DT binding documentation accordingly.
>
> Changes between v5 and v6:
>
> * Use pci_create_root_bus() + pci_scan_child_bus() instead of
> pci_scan_root_bus(). This is needed to be able to add MSI support
> later on. Moreover Thierry Reding suggested that
> pci_scan_root_bus() "does a pci_bus_add_devices(), which is called
> again in pci_common_init() in the ARM code". Thanks Thierry for
> pointing out this issue.
>
> Changes between v4 and v5:
>
> * Rebased on top of 3.9-rc2 + the new mvebu-mbus driver (v3).
>
> * Changed the names of the PCI DT sub-nodes to match the OF
> specifications: they should be named pcie at DD,FF where DD is the
> device number and FF the function number. Requested by Mitch
> Bradley.
>
> * Add the device_type = "pci" property at the pcie-controller
> level. Requested by Mitch Bradley.
>
> * Drop patch 'of/pci: Add of_pci_get_bus() function' because it
> wasn't actually used in the rest of the patch series.
>
> * Updated the patch 'of/pci: Provide support for parsing PCI DT
> ranges property' to use the latest version proposed by Andrew
> Murray on the devicetree-discuss@ mailing list.
>
> Changes between v3 and v4:
>
> * Rebased on top of 3.9-rc1.
>
> * Drop patch "ARM: pci: Allow passing per-controller private data"
> because it was merged in 3.9.
>
> * Drop patch "lib: devres: don't enclose pcim_*() functions in
> CONFIG_HAS_IOPORT", because it was merged in 3.9.
>
> * Added CONFIG_PCI_MVEBU=y in mvebu_defconfig, so that the right PCI
> host controller driver is automatically enabled.
>
> * Instead of using the DT 'ranges' property to encode the PCIe
> register ranges, use a 'reg' property on the main PCIe controller
> DT node together with a 'reg-names' property. Suggested by Jason
> Gunthorpe.
>
> * Don't select PCI_SW_HOST_BRIDGE and PCI_SW_PCI_PCI_BRIDGE, they
> don't exist anymore. Reported by Bjorn Helgaas.
>
> * Added support for the Armada XP GP board.
>
> * Fix the 'ranges' property so that the memory range is an identity
> map between CPU addresses and bus addresses. Suggested by Arnd
> Bergmann.
>
> * Changed the 'ranges' property to have the I/O region after the
> memory region.
>
> * Use the new mvebu-mbus driver API to create/remove address decoding
> windows when needed. This remove the need to include
> <mach/addr-map.h>. Requested by Arnd Bergmann.
>
> * Include directly into the driver the few common PCIe functions we
> were using from arch/arm/plat-orion/pcie.c. This allows to remove
> the inclusion of <plat/pcie.h>. Requested by Arnd Bergmann.
>
> * Directly set up the address decoding windows when the memory
> base/limit and I/O base/limit are configured in the PCI-to-PCI
> bridge instead of relying on the memory and I/O accesses being
> enabled in the PCI_COMMAND register. Suggested by Bjorn Helgaas.
>
> * Added some comments on top of the calculations of the I/O
> base/limit and memory base/limit. Suggested by Arnd Bergmann.
>
> * Changed a bit the way the "realio" resource is created, from
> suggestions given by Arnd Bergmann.
>
> * Updated the Device Tree binding documentation. Reported by Jason
> Gunthorpe.
>
> * Instead of using "marvell,armada-370-xp-pcie" as the DT compatible
> string, use two separate compatible strings:
> "marvell,armada-370-pcie" and "marvell,armada-xp-pcie". For now,
> the driver does the same thing for both.
>
> Changes between v2 and v3:
>
> * Use of_irq_map_pci() instead of of_irq_map_raw(), as suggested by
> Andrew Murray. In order to do this, we moved the interrupt-map and
> interrupt-map-mask DT properties from the main PCIe controller node
> to the DT subnodes representing each PCIe interface.
>
> * Remove the usage of the emulated host bridge.
>
> * Move the emulated PCI-to-PCI bridge code into the Marvell PCI
> driver itself, in order to allow a tighter integration. Suggested
> by Bjorn Helgaas and Jason Gunthorpe.
>
> * Make the allocation of address decoding windows dynamic: it's when
> memory accesses or I/O accesses are enabled at the PCI-to-PCI
> bridge level that we allocate and setup the corresponding address
> decoding window. Requested by Bjorn Helgaas.
>
> * Fixed the implementation of I/O accesses to use I/O addresses that
> fall within the normal IO_SPACE_LIMIT. This required using the
> "remap" functionality of address decoding windows, and therefore
> some changes in the address decoding window allocator. Follows a
> long discussion about I/O accesses.
>
> * Set up a correct bus number in the configuration of the PCIe
> interfaces so that we don't have to fake bus numbers
> anymore. Requested by Jason Gunthorpe.
>
> * Fix the of_pci_get_devfn() implementation according to Stephen
> Warren's comment.
>
> * Use CFLAGS_ instead of ccflags to add the mach-mvebu and plat-orion
> include paths when building the pci-mvebu driver. This ensures that
> the include paths are only added when building this specific
> driver. Requested by Stephen Warren.
>
> * Fix the ->resource_align() to only apply on bus 0 (the one on which
> the emulated PCI-to-PCI bridges sit), and to request an alignment
> on the size of the window (and not only 64 KB for I/O windows and 1
> MB for memory windows).
>
> * Clarified the commit log of "clk: mvebu: create parent-child
> relation for PCIe clocks on Armada 370"
>
> Thanks,
>
> Thomas
>
> Andrew Murray (1):
> of/pci: Provide support for parsing PCI DT ranges property
>
> Thierry Reding (2):
> of/pci: Add of_pci_get_devfn() function
> of/pci: Add of_pci_parse_bus_range() function
>
> Thomas Petazzoni (14):
> pci: infrastructure to add drivers in drivers/pci/host
> arm: pci: add a align_resource hook
> clk: mvebu: create parent-child relation for PCIe clocks on Armada
> 370
> clk: mvebu: add more PCIe clocks for Armada XP
> pci: PCIe driver for Marvell Armada 370/XP systems
> arm: mvebu: PCIe support is now available on mvebu
> arm: mvebu: add PCIe Device Tree informations for Armada 370
> arm: mvebu: add PCIe Device Tree informations for Armada XP
> arm: mvebu: PCIe Device Tree informations for OpenBlocks AX3-4
> arm: mvebu: PCIe Device Tree informations for Armada XP DB
> arm: mvebu: PCIe Device Tree informations for Armada 370 Mirabox
> arm: mvebu: PCIe Device Tree informations for Armada 370 DB
> arm: mvebu: PCIe Device Tree informations for Armada XP GP
> arm: mvebu: update defconfig with PCI and USB support
>
> .../devicetree/bindings/pci/mvebu-pci.txt | 220 +++++
> arch/arm/boot/dts/armada-370-db.dts | 17 +
> arch/arm/boot/dts/armada-370-mirabox.dts | 16 +
> arch/arm/boot/dts/armada-370.dtsi | 51 ++
> arch/arm/boot/dts/armada-xp-db.dts | 33 +
> arch/arm/boot/dts/armada-xp-gp.dts | 21 +
> arch/arm/boot/dts/armada-xp-mv78230.dtsi | 104 +++
> arch/arm/boot/dts/armada-xp-mv78260.dtsi | 122 +++
> arch/arm/boot/dts/armada-xp-mv78460.dtsi | 188 ++++
> arch/arm/boot/dts/armada-xp-openblocks-ax3-4.dts | 9 +
> arch/arm/configs/mvebu_defconfig | 3 +
> arch/arm/include/asm/mach/pci.h | 11 +
> arch/arm/kernel/bios32.c | 6 +
> arch/arm/mach-mvebu/Kconfig | 2 +
> arch/microblaze/pci/pci-common.c | 110 +--
> arch/mips/pci/pci.c | 50 +-
> arch/powerpc/kernel/pci-common.c | 99 +--
> drivers/clk/mvebu/clk-gating-ctrl.c | 18 +-
> drivers/of/address.c | 63 ++
> drivers/of/of_pci.c | 59 +-
> drivers/pci/Kconfig | 2 +
> drivers/pci/Makefile | 3 +
> drivers/pci/host/Kconfig | 8 +
> drivers/pci/host/Makefile | 4 +
> drivers/pci/host/pci-mvebu.c | 927 ++++++++++++++++++++
> include/linux/of_address.h | 42 +
> include/linux/of_pci.h | 2 +
> 27 files changed, 2009 insertions(+), 181 deletions(-)
> create mode 100644 Documentation/devicetree/bindings/pci/mvebu-pci.txt
> create mode 100644 drivers/pci/host/Kconfig
> create mode 100644 drivers/pci/host/Makefile
> create mode 100644 drivers/pci/host/pci-mvebu.c
>
--
Thomas Petazzoni, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com
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