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mirror-linux/drivers/pci/controller/dwc
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Krishna Chaitanya Chundru fc2bc2623e Revert "PCI: qcom: Prepare for the DWC ECAM enablement" 
This reverts commit 4660e50cf8.

Commit f6fd357f7a ("PCI: dwc: Prepare the driver for enabling ECAM
mechanism using iATU 'CFG Shift Feature'") enabled ECAM access by using
the config space start as DBI address.

However, this approach breaks vendor drivers that rely on the DBI address
for internal accesses, especially when the vendor config space is 256MB
aligned.

To resolve this, avoid using the DBI as the start of config space and
instead introduce a custom ECAM PCI ops implementation.

Revert the qcom specific ECAM preparation logic in 4660e50cf8 ("PCI:
qcom: Prepare for the DWC ECAM enablement") since it's no longer necessary.

Signed-off-by: Krishna Chaitanya Chundru <krishna.chundru@oss.qualcomm.com>
[bhelgaas: commit log]
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Link: https://patch.msgid.link/20251017-ecam_fix-v1-2-f6faa3d0edf3@oss.qualcomm.com
 		2025-10-20 10:31:54 -05:00
..
Kconfig Merge branch 'pci/controller/stm32' 2025-10-03 12:13:23 -05:00
Makefile PCI: stm32-ep: Add PCIe Endpoint support for STM32MP25 2025-10-01 09:54:18 -05:00
pci-dra7xx.c PCI: endpoint: Drop superfluous pci_epc_features initialization 2025-08-14 10:42:42 -05:00
pci-exynos.c PCI: dwc: Add support for ELBI resource mapping 2025-09-25 18:33:37 +05:30
pci-imx6.c Merge branch 'pci/controller/imx6' 2025-10-03 12:13:18 -05:00
pci-keystone.c Merge branch 'pci/controller/keystone' 2025-10-03 12:13:19 -05:00
pci-layerscape-ep.c PCI: layerscape-ep: Use the generic dw_pcie_ep_linkdown() API to handle Link Down event 2024-07-09 18:21:11 -05:00
pci-layerscape.c PCI: layerscape: Fix arg_count to syscon_regmap_lookup_by_phandle_args() 2025-03-27 13:11:14 -05:00
pci-meson.c PCI: dwc: Return bool from link up check 2025-05-13 10:12:59 +01:00
pcie-al.c PCI: dwc: Support ECAM mechanism by enabling iATU 'CFG Shift Feature' 2025-09-25 18:34:01 +05:30
pcie-amd-mdb.c PCI: amd-mdb: Add support for PCIe RP PERST# signal handling 2025-08-11 16:09:45 +05:30
pcie-armada8k.c PCI: dwc: Return bool from link up check 2025-05-13 10:12:59 +01:00
pcie-artpec6.c PCI: endpoint: Drop superfluous pci_epc_features initialization 2025-08-14 10:42:42 -05:00
pcie-bt1.c PCI: controller: Switch back to struct platform_driver::remove() 2024-10-03 16:44:49 -05:00
pcie-designware-debugfs.c PCI: dwc: Make dw_pcie_ptm_ops static 2025-07-07 13:23:15 +05:30
pcie-designware-ep.c PCI: dwc: ep: Implement capability search using PCI core APIs 2025-08-20 15:56:19 -05:00
pcie-designware-host.c PCI: dwc: Use custom pci_ops for root bus DBI vs ECAM config access 2025-10-20 10:31:54 -05:00
pcie-designware-plat.c PCI: endpoint: Drop superfluous pci_epc_features initialization 2025-08-14 10:42:42 -05:00
pcie-designware.c Merge branch 'pci/controller/qcom' 2025-10-03 12:13:20 -05:00
pcie-designware.h Merge branch 'pci/controller/qcom' 2025-10-03 12:13:20 -05:00
pcie-dw-rockchip.c pci-v6.18-changes 2025-10-06 10:41:03 -07:00
pcie-fu740.c PCI: dwc: Drop host prefix from struct dw_pcie_host_ops members 2024-01-06 07:51:08 +00:00
pcie-hisi.c PCI: host-common: Convert to library for host controller drivers 2025-05-30 12:21:57 -05:00
pcie-histb.c PCI: dwc: Return bool from link up check 2025-05-13 10:12:59 +01:00
pcie-intel-gw.c PCI: intel-gw: Remove intel_pcie_cpu_addr() 2025-03-24 14:58:35 -05:00
pcie-keembay.c PCI: endpoint: Drop superfluous pci_epc_features initialization 2025-08-14 10:42:42 -05:00
pcie-kirin.c PCI: dwc: Return bool from link up check 2025-05-13 10:12:59 +01:00
pcie-qcom-common.c PCI: qcom: Fix macro typo for CURSOR 2025-09-04 22:25:22 +05:30
pcie-qcom-common.h PCI: qcom: Add equalization settings for 8.0 GT/s and 32.0 GT/s 2025-09-04 22:24:04 +05:30
pcie-qcom-ep.c Merge branch 'pci/controller/qcom' 2025-10-03 12:13:20 -05:00
pcie-qcom.c Revert "PCI: qcom: Prepare for the DWC ECAM enablement" 2025-10-20 10:31:54 -05:00
pcie-rcar-gen4.c Merge branch 'pci/controller/rcar-gen4' 2025-10-03 12:13:21 -05:00
pcie-sophgo.c PCI: dwc: Add Sophgo SG2044 PCIe controller driver in Root Complex mode 2025-07-24 16:29:46 -05:00
pcie-spear13xx.c PCI: dwc: Return bool from link up check 2025-05-13 10:12:59 +01:00
pcie-stm32-ep.c PCI: stm32-ep: Add PCIe Endpoint support for STM32MP25 2025-10-01 09:54:18 -05:00
pcie-stm32.c PCI: stm32: Add PCIe host support for STM32MP25 2025-10-01 09:53:37 -05:00
pcie-stm32.h PCI: stm32-ep: Add PCIe Endpoint support for STM32MP25 2025-10-01 09:54:18 -05:00
pcie-tegra194-acpi.c PCI: dwc: Simplify in/outbound iATU setup methods 2022-08-01 15:15:09 -05:00
pcie-tegra194.c Merge branch 'pci/controller/tegra' 2025-10-03 12:13:23 -05:00
pcie-uniphier-ep.c PCI: dwc: ep: Remove dw_pcie_ep_init_notify() wrapper 2024-07-09 18:20:21 -05:00
pcie-uniphier.c pci-v6.16-changes 2025-06-04 11:26:17 -07:00
pcie-visconti.c PCI: dwc: Return bool from link up check 2025-05-13 10:12:59 +01:00