| Message ID | 20250121-enable_ecam-v3-1-cd84d3b2a7ba@oss.qualcomm.com (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | PCI: dwc: Add ECAM support with iATU configuration | expand |
On Tue, Jan 21, 2025 at 02:32:19PM +0530, Krishna Chaitanya Chundru wrote: > PCIe ECAM(Enhanced Configuration Access Mechanism) feature requires > maximum of 256MB configuration space. > > To enable this feature increase configuration space size to 256MB. If > the config space is increased, the BAR space needs to be truncated as > it resides in the same location. To avoid the bar space truncation move > config space, DBI, ELBI, iATU to upper PCIe region and use lower PCIe > region entirely for BAR region. > You also need to mention that this change depends on the commit: '10ba0854c5e6 ("PCI: qcom: Disable mirroring of DBI and iATU register space in BAR region")' > Signed-off-by: Krishna Chaitanya Chundru <krishna.chundru@oss.qualcomm.com> Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> - Mani
diff --git a/arch/arm64/boot/dts/qcom/sc7280.dtsi b/arch/arm64/boot/dts/qcom/sc7280.dtsi index 55db1c83ef55..bece859aee31 100644 --- a/arch/arm64/boot/dts/qcom/sc7280.dtsi +++ b/arch/arm64/boot/dts/qcom/sc7280.dtsi @@ -2201,10 +2201,10 @@ wifi: wifi@17a10040 { pcie1: pcie@1c08000 { compatible = "qcom,pcie-sc7280"; reg = <0 0x01c08000 0 0x3000>, - <0 0x40000000 0 0xf1d>, - <0 0x40000f20 0 0xa8>, - <0 0x40001000 0 0x1000>, - <0 0x40100000 0 0x100000>; + <4 0x00000000 0 0xf1d>, + <4 0x00000f20 0 0xa8>, + <4 0x10000000 0 0x1000>, + <4 0x00000000 0 0x10000000>; reg-names = "parf", "dbi", "elbi", "atu", "config"; device_type = "pci"; @@ -2215,8 +2215,8 @@ pcie1: pcie@1c08000 { #address-cells = <3>; #size-cells = <2>; - ranges = <0x01000000 0x0 0x00000000 0x0 0x40200000 0x0 0x100000>, - <0x02000000 0x0 0x40300000 0x0 0x40300000 0x0 0x1fd00000>; + ranges = <0x01000000 0x0 0x00000000 0x0 0x40000000 0x0 0x100000>, + <0x02000000 0x0 0x40100000 0x0 0x40100000 0x0 0x1ff00000>; interrupts = <GIC_SPI 307 IRQ_TYPE_LEVEL_HIGH>, <GIC_SPI 308 IRQ_TYPE_LEVEL_HIGH>,
PCIe ECAM(Enhanced Configuration Access Mechanism) feature requires maximum of 256MB configuration space. To enable this feature increase configuration space size to 256MB. If the config space is increased, the BAR space needs to be truncated as it resides in the same location. To avoid the bar space truncation move config space, DBI, ELBI, iATU to upper PCIe region and use lower PCIe region entirely for BAR region. Signed-off-by: Krishna Chaitanya Chundru <krishna.chundru@oss.qualcomm.com> --- arch/arm64/boot/dts/qcom/sc7280.dtsi | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-)