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6 commits

Author SHA1 Message Date
Qinglang Miao
9846155b00 PCI: loongson: Simplify loongson_pci_probe() return expression
Simplify the return expression.

Link: https://lore.kernel.org/r/20200921131054.92797-1-miaoqinglang@huawei.com
Signed-off-by: Qinglang Miao <miaoqinglang@huawei.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Rob Herring <robh@kernel.org>
2020-10-02 12:56:31 +01:00
Bjorn Helgaas
49e427e6bd Merge branch 'pci/host-probe-refactor'
- Use pci_host_bridge.windows list directly instead of splicing in a
  temporary list for cadence, mvebu, host-common (Rob Herring)

- Use pci_host_probe() instead of open-coding all the pieces for altera,
  brcmstb, iproc, mobiveil, rcar, rockchip, tegra, v3, versatile, xgene,
  xilinx, xilinx-nwl (Rob Herring)

- Convert to devm_platform_ioremap_resource_byname() instead of open-coding
  platform_get_resource_byname() and devm_ioremap_resource() for altera,
  cadence, mediatek, rockchip, tegra, xgene (Dejin Zheng)

- Convert to devm_platform_ioremap_resource() instead of open-coding
  platform_get_resource() and devm_ioremap_resource() for aardvark,
  brcmstb, exynos, ftpci100, versatile (Dejin Zheng)

- Remove redundant error messages from devm_pci_remap_cfg_resource()
  callers (Dejin Zheng)

- Drop useless PCI_ENABLE_PROC_DOMAINS from versatile driver (Rob Herring)

- Default host bridge parent device to the platform device (Rob Herring)

- Drop unnecessary zeroing of host bridge fields (Rob Herring)

- Use pci_is_root_bus() instead of tracking root bus number separately in
  aardvark, designware (imx6, keystone, designware-host), mobiveil,
  xilinx-nwl, xilinx, rockchip, rcar (Rob Herring)

- Set host bridge bus number in pci_scan_root_bus_bridge() instead of each
  driver for aardvark, designware-host, host-common, mediatek, rcar, tegra,
  v3-semi (Rob Herring)

- Use bridge resources instead of parsing DT 'ranges' again for cadence
  (Rob Herring)

- Remove private bus number and range from cadence (Rob Herring)

- Use devm_pci_alloc_host_bridge() to simplify rcar (Rob Herring)

- Use struct pci_host_bridge.windows list directly rather than a temporary
  (Rob Herring)

- Reduce OF "missing non-prefetchable window" from error to warning message
  (Rob Herring)

- Convert rcar-gen2 from old Arm-specific pci_common_init_dev() to new
  arch-independent interfaces (Rob Herring)

- Move DT resource setup into devm_pci_alloc_host_bridge() (Rob Herring)

- Set bridge map_irq and swizzle_irq to default functions; drivers that
  don't support legacy IRQs (iproc) need to undo this (Rob Herring)

* pci/host-probe-refactor:
  PCI: Set bridge map_irq and swizzle_irq to default functions
  PCI: Move DT resource setup into devm_pci_alloc_host_bridge()
  PCI: rcar-gen2: Convert to use modern host bridge probe functions
  PCI: of: Reduce missing non-prefetchable memory region to a warning
  PCI: rcar: Use struct pci_host_bridge.windows list directly
  PCI: rcar: Use devm_pci_alloc_host_bridge()
  PCI: cadence: Remove private bus number and range storage
  PCI: cadence: Use bridge resources for outbound window setup
  PCI: Move setting pci_host_bridge.busnr out of host drivers
  PCI: rcar: Use pci_is_root_bus() to check if bus is root bus
  PCI: rockchip: Use pci_is_root_bus() to check if bus is root bus
  PCI: xilinx: Use pci_is_root_bus() to check if bus is root bus
  PCI: xilinx-nwl: Use pci_is_root_bus() to check if bus is root bus
  PCI: mobiveil: Use pci_is_root_bus() to check if bus is root bus
  PCI: designware: Use pci_is_root_bus() to check if bus is root bus
  PCI: aardvark: Use pci_is_root_bus() to check if bus is root bus
  PCI: Drop unnecessary zeroing of bridge fields
  PCI: Set default bridge parent device
  PCI: versatile: Drop flag PCI_ENABLE_PROC_DOMAINS
  PCI: controller: Remove duplicate error message
  PCI: controller: Convert to devm_platform_ioremap_resource()
  PCI: controller: Convert to devm_platform_ioremap_resource_byname()
  PCI: xilinx: Use pci_host_probe() to register host
  PCI: xilinx-nwl: Use pci_host_probe() to register host
  PCI: rockchip: Use pci_host_probe() to register host
  PCI: rcar: Use pci_host_probe() to register host
  PCI: iproc: Use pci_host_probe() to register host
  PCI: altera: Use pci_host_probe() to register host
  PCI: xgene: Use pci_host_probe() to register host
  PCI: versatile: Use pci_host_probe() to register host
  PCI: v3: Use pci_host_probe() to register host
  PCI: tegra: Use pci_host_probe() to register host
  PCI: mobiveil: Use pci_host_probe() to register host
  PCI: brcmstb: Use pci_host_probe() to register host
  PCI: host-common: Use struct pci_host_bridge.windows list directly
  PCI: mvebu: Use struct pci_host_bridge.windows list directly
  PCI: cadence: Use struct pci_host_bridge.windows list directly

# Conflicts:
#	drivers/pci/controller/cadence/pcie-cadence-host.c
2020-08-05 18:24:21 -05:00
Rob Herring
669cbc7081 PCI: Move DT resource setup into devm_pci_alloc_host_bridge()
Now that pci_parse_request_of_pci_ranges() callers just setup
pci_host_bridge.windows and dma_ranges directly and don't need the bus
range returned, we can just initialize them when allocating the
pci_host_bridge struct.

With this, pci_parse_request_of_pci_ranges() becomes a static function.

Link: https://lore.kernel.org/r/20200722022514.1283916-19-robh@kernel.org
Signed-off-by: Rob Herring <robh@kernel.org>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>
2020-08-04 16:36:30 +01:00
Rob Herring
6a589900d0 PCI: Set default bridge parent device
The host bridge's parent device is always the platform device. As we
already have a pointer to it in the devres functions, let's initialize
the parent device. Drivers can still override the parent if desired.

Link: https://lore.kernel.org/r/20200722022514.1283916-3-robh@kernel.org
Signed-off-by: Rob Herring <robh@kernel.org>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>
2020-07-23 11:20:49 +01:00
Tiezhu Yang
14110af606 PCI: loongson: Use DECLARE_PCI_FIXUP_EARLY for bridge_class_quirk()
According to the datasheet of Loongson LS7A bridge chip, the old version
of Loongson LS7A PCIE port has a wrong value about PCI class which is
0x060000, the correct value should be 0x060400, this bug can be fixed by
"dev->class = PCI_CLASS_BRIDGE_PCI << 8;" at the software level and it
was fixed in hardware in the latest LS7A versions.

In order to maintain downward compatibility, use DECLARE_PCI_FIXUP_EARLY
instead of DECLARE_PCI_FIXUP_HEADER for bridge_class_quirk() to fix it as
early as possible.

Otherwise, in the function pci_setup_device(), the related code about
"dev->class" such as "class = dev->class >> 8;" and "dev->transparent
= ((dev->class & 0xff) == 1);" maybe get wrong value without EARLY fixup.

Link: https://lore.kernel.org/r/1595065176-460-1-git-send-email-yangtiezhu@loongson.cn
Fixes: 1f58cca5cf ("PCI: Add Loongson PCI Controller support")
Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
2020-07-20 14:55:48 +01:00
Jiaxun Yang
1f58cca5cf PCI: Add Loongson PCI Controller support
This controller can be found on Loongson-2K SoC, Loongson-3
systems with RS780E/LS7A PCH.

The RS780E part of code was previously located at
arch/mips/pci/ops-loongson3.c and now it can use generic PCI
driver implementation.

Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Acked-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
2020-05-27 12:52:30 +02:00