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linux/drivers/pci/controller
History
Huacai Chen e22b88f234 PCI: loongson: Enable MSI in LS7A Root Complex 
commit a4bbcac11d upstream.

The LS7A chipset can be used as part of a PCIe Root Complex with
Loongson-3C6000 and similar CPUs.  In this case, DEV_LS7A_PCIE_PORT5 has a
PCI_CLASS_BRIDGE_HOST class code, and it is a Type 0 Function whose config
space provides access to Root Complex registers.

The DEV_LS7A_PCIE_PORT5 has an MSI Capability, and its MSI Enable bit must
be set before other devices below the Root Complex can use MSI.  This is
not the standard PCI behavior of MSI Enable, so the normal PCI MSI code
does not set it.

Set the DEV_LS7A_PCIE_PORT5 MSI Enable bit via a quirk so other devices
below the Root Complex can use MSI.

[kwilczynski: exit early to reduce indentation; commit log]
Link: https://lore.kernel.org/linux-pci/20240612065315.2048110-1-chenhuacai@loongson.cn
Signed-off-by: Sheng Wu <wusheng@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>
[bhelgaas: commit log]
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
History 2024-08-03 08:54:21 +02:00
..
cadence PCI: Fix typos in docs and comments 2023-08-25 08:15:38 -05:00
dwc PCI: dw-rockchip: Fix initial PERST# GPIO value 2024-08-03 08:54:21 +02:00
mobiveil PCI: Explicitly include correct DT includes 2023-07-18 14:33:17 -05:00
Kconfig pci-v6.6-changes 2023-08-30 20:23:07 -07:00
Makefile Merge branch 'pci/host/mt7621' 2021-11-05 11:28:51 -05:00
pci-aardvark.c PCI: aardvark: Convert to platform remove callback returning void 2023-06-24 14:10:09 +00:00
pci-ftpci100.c PCI: Explicitly include correct DT includes 2023-07-18 14:33:17 -05:00
pci-host-common.c PCI: Explicitly include correct DT includes 2023-07-18 14:33:17 -05:00
pci-host-generic.c PCI: Unify ECAM constants in native PCI Express drivers 2020-12-10 14:55:49 -06:00
pci-hyperv-intf.c PCI: hv: Add a Hyper-V PCI interface driver for software backchannel interface 2019-08-22 00:25:12 -07:00
pci-hyperv.c PCI: hv: Return zero, not garbage, when reading PCI_INTERRUPT_PIN 2024-08-03 08:54:21 +02:00
pci-ixp4xx.c PCI: Explicitly include correct DT includes 2023-07-18 14:33:17 -05:00
pci-loongson.c PCI: loongson: Enable MSI in LS7A Root Complex 2024-08-03 08:54:21 +02:00
pci-mvebu.c PCI: mvebu: Use FIELD_PREP() with Link Width 2023-11-28 17:19:43 +00:00
pci-rcar-gen2.c PCI: rcar-gen2: Use devm_platform_get_and_ioremap_resource() 2023-07-13 18:12:35 +00:00
pci-tegra.c PCI: tegra: Convert to platform remove callback returning void 2023-06-24 14:14:02 +00:00
pci-thunder-ecam.c PCI: thunder: Drop error data fabrication when config read fails 2021-11-18 13:39:32 -06:00
pci-thunder-pem.c PCI: thunder: Drop error data fabrication when config read fails 2021-11-18 13:39:32 -06:00
pci-v3-semi.c Merge branch 'pci/misc' 2023-08-29 11:03:57 -05:00
pci-versatile.c PCI: Remove MODULE_LICENSE so boolean drivers don't look like modules 2023-02-17 08:47:58 -06:00
pci-xgene-msi.c PCI: xgene-msi: Use devm_platform_get_and_ioremap_resource() 2023-07-13 18:12:36 +00:00
pci-xgene.c PCI: Remove unnecessary <linux/of_irq.h> includes 2022-11-10 14:53:51 -06:00
pcie-altera-msi.c PCI: altera-msi: Convert to platform remove callback returning void 2023-06-24 14:10:47 +00:00
pcie-altera.c PCI: Explicitly include correct DT includes 2023-07-18 14:33:17 -05:00
pcie-apple.c Merge branch 'pci/misc' 2023-08-29 11:03:57 -05:00
pcie-brcmstb.c PCI: brcmstb: Fix broken brcm_pcie_mdio_write() polling 2024-03-26 18:19:56 -04:00
pcie-hisi-error.c PCI: hisi-error: Convert to platform remove callback returning void 2023-06-24 14:12:13 +00:00
pcie-iproc-bcma.c PCI: Add defines for normal and subtractive PCI bridges 2022-02-17 15:29:35 -06:00
pcie-iproc-msi.c PCI: iproc: Use of_property_read_bool() for boolean properties 2023-07-13 18:09:24 +00:00
pcie-iproc-platform.c PCI: iproc: Convert to platform remove callback returning void 2023-06-24 14:12:36 +00:00
pcie-iproc.c PCI: iproc: Convert to platform remove callback returning void 2023-06-24 14:12:36 +00:00
pcie-iproc.h PCI: iproc: Convert to platform remove callback returning void 2023-06-24 14:12:36 +00:00
pcie-mediatek-gen3.c PCI: mediatek-gen3: Fix translation window size calculation 2024-01-25 15:35:55 -08:00
pcie-mediatek.c PCI: mediatek: Clear interrupt status before dispatching handler 2024-01-25 15:35:48 -08:00
pcie-microchip-host.c Merge branch 'pci/controller/remove-void-cast' 2023-08-29 11:03:56 -05:00
pcie-mt7621.c PCI: mt7621: Convert to platform remove callback returning void 2023-06-24 14:13:16 +00:00
pcie-rcar-ep.c PCI: rcar-ep: Remove unneeded includes 2021-10-08 09:41:38 -05:00
pcie-rcar-host.c PCI: rcar: Demote WARN() to dev_warn_ratelimited() in rcar_pcie_wakeup() 2024-08-03 08:53:56 +02:00
pcie-rcar.c PCI: rcar: Fix calculating mask for PCIEPAMR register 2020-05-11 11:29:48 +01:00
pcie-rcar.h PCI: rcar: Avoid defines prefixed with CONFIG 2023-03-10 13:34:27 +01:00
pcie-rockchip-ep.c PCI: rockchip-ep: Remove wrong mask on subsys_vendor_id 2024-06-21 14:38:41 +02:00
pcie-rockchip-host.c PCI: Explicitly include correct DT includes 2023-07-18 14:33:17 -05:00
pcie-rockchip.c PCI: rockchip: Use GPIOD_OUT_LOW flag while requesting ep_gpio 2024-08-03 08:54:21 +02:00
pcie-rockchip.h PCI: rockchip: Use 64-bit mask on MSI 64-bit PCI address 2023-07-13 18:25:44 +00:00
pcie-xilinx-cpm.c PCI: Remove unnecessary <linux/of_irq.h> includes 2022-11-10 14:53:51 -06:00
pcie-xilinx-nwl.c Merge branch 'pci/kbuild' 2022-12-10 10:36:52 -06:00
pcie-xilinx.c PCI: xilinx: Rename xilinx_pcie_port to xilinx_pcie 2022-01-03 15:05:28 -06:00
vmd.c PCI: vmd: Fix potential deadlock when enabling ASPM 2023-12-20 17:01:54 +01:00