diff mbox series

[3/3] arm64: dts: qcom: sm8450: Use GIC-ITS for PCIe0 and PCIe1

Message ID 20221219191427.480085-4-manivannan.sadhasivam@linaro.org (mailing list archive)
State Superseded
Headers show
Series Qcom: Add GIC-ITS support to SM8450 PCIe controllers | expand

Commit Message

Manivannan Sadhasivam Dec. 19, 2022, 7:14 p.m. UTC 
Both PCIe0 and PCIe1 controllers are capable of receiving MSIs from
endpoint devices using GIC-ITS MSI controller. Add support for it.

Currently, BDF (0:0.0) and BDF (1:0.0) are enabled and with the
msi-map-mask of 0xff00, all the 32 devices under these two busses can
share the same Device ID.

The GIC-ITS MSI implementation provides an advantage over internal MSI
implementation using Locality-specific Peripheral Interrupts (LPI) that
would allow MSIs to be targeted for each CPU core.

Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
---
 arch/arm64/boot/dts/qcom/sm8450.dtsi | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

Comments

Konrad Dybcio Dec. 19, 2022, 8:51 p.m. UTC | #1 
On 19.12.2022 20:14, Manivannan Sadhasivam wrote:
> Both PCIe0 and PCIe1 controllers are capable of receiving MSIs from
> endpoint devices using GIC-ITS MSI controller. Add support for it.
> 
> Currently, BDF (0:0.0) and BDF (1:0.0) are enabled and with the
> msi-map-mask of 0xff00, all the 32 devices under these two busses can
> share the same Device ID.
> 
> The GIC-ITS MSI implementation provides an advantage over internal MSI
> implementation using Locality-specific Peripheral Interrupts (LPI) that
> would allow MSIs to be targeted for each CPU core.
> 
> Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
> ---
This breaks PCIe Wi-Fi on Xperia 1 IV:

[   32.711199] ath11k_pci 0000:01:00.0: Adding to iommu group 5
[   32.713738] ath11k_pci 0000:01:00.0: BAR 0: assigned [mem 0x60400000-0x605fffff 64bit]
[   32.715447] ath11k_pci 0000:01:00.0: MSI vectors: 32
[   32.715485] ath11k_pci 0000:01:00.0: wcn6855 hw2.1
[   32.873873] mhi mhi0: Requested to power ON
[   32.873896] mhi mhi0: Power on setup success
[   65.161798] arm-smmu 15000000.iommu: Unhandled context fault: fsr=0x402, iova=0x91517088, fsynr=0x640001, cbfrsynra=0x1c00, cb=5


Konrad
>  arch/arm64/boot/dts/qcom/sm8450.dtsi | 12 ++++++------
>  1 file changed, 6 insertions(+), 6 deletions(-)
> 
> diff --git a/arch/arm64/boot/dts/qcom/sm8450.dtsi b/arch/arm64/boot/dts/qcom/sm8450.dtsi
> index 570475040d95..276ceba4c247 100644
> --- a/arch/arm64/boot/dts/qcom/sm8450.dtsi
> +++ b/arch/arm64/boot/dts/qcom/sm8450.dtsi
> @@ -1733,9 +1733,9 @@ pcie0: pci@1c00000 {
>  			ranges = <0x01000000 0x0 0x60200000 0 0x60200000 0x0 0x100000>,
>  				 <0x02000000 0x0 0x60300000 0 0x60300000 0x0 0x3d00000>;
>  
> -			interrupts = <GIC_SPI 141 IRQ_TYPE_LEVEL_HIGH>;
> -			interrupt-names = "msi";
> -			#interrupt-cells = <1>;
> +			msi-map = <0x0 &gic_its 0x5980 0x1>,
> +				  <0x100 &gic_its 0x5981 0x1>;
> +			msi-map-mask = <0xff00>;
>  			interrupt-map-mask = <0 0 0 0x7>;
>  			interrupt-map = <0 0 0 1 &intc 0 0 0 149 IRQ_TYPE_LEVEL_HIGH>, /* int_a */
>  					<0 0 0 2 &intc 0 0 0 150 IRQ_TYPE_LEVEL_HIGH>, /* int_b */
> @@ -1842,9 +1842,9 @@ pcie1: pci@1c08000 {
>  			ranges = <0x01000000 0x0 0x40200000 0 0x40200000 0x0 0x100000>,
>  				 <0x02000000 0x0 0x40300000 0 0x40300000 0x0 0x1fd00000>;
>  
> -			interrupts = <GIC_SPI 307 IRQ_TYPE_LEVEL_HIGH>;
> -			interrupt-names = "msi";
> -			#interrupt-cells = <1>;
> +			msi-map = <0x0 &gic_its 0x5a01 0x1>,
> +				  <0x100 &gic_its 0x5a00 0x1>;
> +			msi-map-mask = <0xff00>;
>  			interrupt-map-mask = <0 0 0 0x7>;
>  			interrupt-map = <0 0 0 1 &intc 0 0 0 434 IRQ_TYPE_LEVEL_HIGH>, /* int_a */
>  					<0 0 0 2 &intc 0 0 0 435 IRQ_TYPE_LEVEL_HIGH>, /* int_b */
Dmitry Baryshkov Dec. 19, 2022, 9:46 p.m. UTC | #2 
On 19/12/2022 21:14, Manivannan Sadhasivam wrote:
> Both PCIe0 and PCIe1 controllers are capable of receiving MSIs from
> endpoint devices using GIC-ITS MSI controller. Add support for it.
> 
> Currently, BDF (0:0.0) and BDF (1:0.0) are enabled and with the
> msi-map-mask of 0xff00, all the 32 devices under these two busses can
> share the same Device ID.
> 
> The GIC-ITS MSI implementation provides an advantage over internal MSI
> implementation using Locality-specific Peripheral Interrupts (LPI) that
> would allow MSIs to be targeted for each CPU core.
> 
> Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
> ---
>   arch/arm64/boot/dts/qcom/sm8450.dtsi | 12 ++++++------
>   1 file changed, 6 insertions(+), 6 deletions(-)
> 
> diff --git a/arch/arm64/boot/dts/qcom/sm8450.dtsi b/arch/arm64/boot/dts/qcom/sm8450.dtsi
> index 570475040d95..276ceba4c247 100644
> --- a/arch/arm64/boot/dts/qcom/sm8450.dtsi
> +++ b/arch/arm64/boot/dts/qcom/sm8450.dtsi
> @@ -1733,9 +1733,9 @@ pcie0: pci@1c00000 {
>   			ranges = <0x01000000 0x0 0x60200000 0 0x60200000 0x0 0x100000>,
>   				 <0x02000000 0x0 0x60300000 0 0x60300000 0x0 0x3d00000>;
>   
> -			interrupts = <GIC_SPI 141 IRQ_TYPE_LEVEL_HIGH>;
> -			interrupt-names = "msi";
> -			#interrupt-cells = <1>;
> +			msi-map = <0x0 &gic_its 0x5980 0x1>,
> +				  <0x100 &gic_its 0x5981 0x1>;

Does ITS support handling more than one MSI interrupt per device? 
Otherwise it might be better to switch to multi-MSI scheme using SPI 
interrupts.

> +			msi-map-mask = <0xff00>;
>   			interrupt-map-mask = <0 0 0 0x7>;
>   			interrupt-map = <0 0 0 1 &intc 0 0 0 149 IRQ_TYPE_LEVEL_HIGH>, /* int_a */
>   					<0 0 0 2 &intc 0 0 0 150 IRQ_TYPE_LEVEL_HIGH>, /* int_b */
> @@ -1842,9 +1842,9 @@ pcie1: pci@1c08000 {
>   			ranges = <0x01000000 0x0 0x40200000 0 0x40200000 0x0 0x100000>,
>   				 <0x02000000 0x0 0x40300000 0 0x40300000 0x0 0x1fd00000>;
>   
> -			interrupts = <GIC_SPI 307 IRQ_TYPE_LEVEL_HIGH>;
> -			interrupt-names = "msi";
> -			#interrupt-cells = <1>;
> +			msi-map = <0x0 &gic_its 0x5a01 0x1>,
> +				  <0x100 &gic_its 0x5a00 0x1>;

Are you sure that the order is correct here?

> +			msi-map-mask = <0xff00>;
>   			interrupt-map-mask = <0 0 0 0x7>;
>   			interrupt-map = <0 0 0 1 &intc 0 0 0 434 IRQ_TYPE_LEVEL_HIGH>, /* int_a */
>   					<0 0 0 2 &intc 0 0 0 435 IRQ_TYPE_LEVEL_HIGH>, /* int_b */
Manivannan Sadhasivam Dec. 20, 2022, 10:34 a.m. UTC | #3 
On Mon, Dec 19, 2022 at 11:46:03PM +0200, Dmitry Baryshkov wrote:
> On 19/12/2022 21:14, Manivannan Sadhasivam wrote:
> > Both PCIe0 and PCIe1 controllers are capable of receiving MSIs from
> > endpoint devices using GIC-ITS MSI controller. Add support for it.
> > 
> > Currently, BDF (0:0.0) and BDF (1:0.0) are enabled and with the
> > msi-map-mask of 0xff00, all the 32 devices under these two busses can
> > share the same Device ID.
> > 
> > The GIC-ITS MSI implementation provides an advantage over internal MSI
> > implementation using Locality-specific Peripheral Interrupts (LPI) that
> > would allow MSIs to be targeted for each CPU core.
> > 
> > Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
> > ---
> >   arch/arm64/boot/dts/qcom/sm8450.dtsi | 12 ++++++------
> >   1 file changed, 6 insertions(+), 6 deletions(-)
> > 
> > diff --git a/arch/arm64/boot/dts/qcom/sm8450.dtsi b/arch/arm64/boot/dts/qcom/sm8450.dtsi
> > index 570475040d95..276ceba4c247 100644
> > --- a/arch/arm64/boot/dts/qcom/sm8450.dtsi
> > +++ b/arch/arm64/boot/dts/qcom/sm8450.dtsi
> > @@ -1733,9 +1733,9 @@ pcie0: pci@1c00000 {
> >   			ranges = <0x01000000 0x0 0x60200000 0 0x60200000 0x0 0x100000>,
> >   				 <0x02000000 0x0 0x60300000 0 0x60300000 0x0 0x3d00000>;
> > -			interrupts = <GIC_SPI 141 IRQ_TYPE_LEVEL_HIGH>;
> > -			interrupt-names = "msi";
> > -			#interrupt-cells = <1>;
> > +			msi-map = <0x0 &gic_its 0x5980 0x1>,
> > +				  <0x100 &gic_its 0x5981 0x1>;
> 
> Does ITS support handling more than one MSI interrupt per device? Otherwise
> it might be better to switch to multi-MSI scheme using SPI interrupts.
> 

Yes, it does support multiple MSIs from endpoints. I've verified it using the
MHI Endpoint device.

> > +			msi-map-mask = <0xff00>;
> >   			interrupt-map-mask = <0 0 0 0x7>;
> >   			interrupt-map = <0 0 0 1 &intc 0 0 0 149 IRQ_TYPE_LEVEL_HIGH>, /* int_a */
> >   					<0 0 0 2 &intc 0 0 0 150 IRQ_TYPE_LEVEL_HIGH>, /* int_b */
> > @@ -1842,9 +1842,9 @@ pcie1: pci@1c08000 {
> >   			ranges = <0x01000000 0x0 0x40200000 0 0x40200000 0x0 0x100000>,
> >   				 <0x02000000 0x0 0x40300000 0 0x40300000 0x0 0x1fd00000>;
> > -			interrupts = <GIC_SPI 307 IRQ_TYPE_LEVEL_HIGH>;
> > -			interrupt-names = "msi";
> > -			#interrupt-cells = <1>;
> > +			msi-map = <0x0 &gic_its 0x5a01 0x1>,
> > +				  <0x100 &gic_its 0x5a00 0x1>;
> 
> Are you sure that the order is correct here?
> 

Ideally, BDF (1:0.0) should be assinged the Device ID of 0x5a01. But based on my
experiments, it doesn't work. But if the Device ID gets swapped, it works.

Maybe I should add a comment here.

Thanks,
Mani

> > +			msi-map-mask = <0xff00>;
> >   			interrupt-map-mask = <0 0 0 0x7>;
> >   			interrupt-map = <0 0 0 1 &intc 0 0 0 434 IRQ_TYPE_LEVEL_HIGH>, /* int_a */
> >   					<0 0 0 2 &intc 0 0 0 435 IRQ_TYPE_LEVEL_HIGH>, /* int_b */
> 
> -- 
> With best wishes
> Dmitry
>
Manivannan Sadhasivam Dec. 20, 2022, 10:42 a.m. UTC | #4 
On Mon, Dec 19, 2022 at 09:51:40PM +0100, Konrad Dybcio wrote:
> 
> 
> On 19.12.2022 20:14, Manivannan Sadhasivam wrote:
> > Both PCIe0 and PCIe1 controllers are capable of receiving MSIs from
> > endpoint devices using GIC-ITS MSI controller. Add support for it.
> > 
> > Currently, BDF (0:0.0) and BDF (1:0.0) are enabled and with the
> > msi-map-mask of 0xff00, all the 32 devices under these two busses can
> > share the same Device ID.
> > 
> > The GIC-ITS MSI implementation provides an advantage over internal MSI
> > implementation using Locality-specific Peripheral Interrupts (LPI) that
> > would allow MSIs to be targeted for each CPU core.
> > 
> > Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
> > ---
> This breaks PCIe Wi-Fi on Xperia 1 IV:
> 
> [   32.711199] ath11k_pci 0000:01:00.0: Adding to iommu group 5
> [   32.713738] ath11k_pci 0000:01:00.0: BAR 0: assigned [mem 0x60400000-0x605fffff 64bit]
> [   32.715447] ath11k_pci 0000:01:00.0: MSI vectors: 32
> [   32.715485] ath11k_pci 0000:01:00.0: wcn6855 hw2.1
> [   32.873873] mhi mhi0: Requested to power ON
> [   32.873896] mhi mhi0: Power on setup success
> [   65.161798] arm-smmu 15000000.iommu: Unhandled context fault: fsr=0x402, iova=0x91517088, fsynr=0x640001, cbfrsynra=0x1c00, cb=5
> 

Thanks a lot for testing! Can you please share the full dmesg log?

Thanks,
Mani

> 
> Konrad
> >  arch/arm64/boot/dts/qcom/sm8450.dtsi | 12 ++++++------
> >  1 file changed, 6 insertions(+), 6 deletions(-)
> > 
> > diff --git a/arch/arm64/boot/dts/qcom/sm8450.dtsi b/arch/arm64/boot/dts/qcom/sm8450.dtsi
> > index 570475040d95..276ceba4c247 100644
> > --- a/arch/arm64/boot/dts/qcom/sm8450.dtsi
> > +++ b/arch/arm64/boot/dts/qcom/sm8450.dtsi
> > @@ -1733,9 +1733,9 @@ pcie0: pci@1c00000 {
> >  			ranges = <0x01000000 0x0 0x60200000 0 0x60200000 0x0 0x100000>,
> >  				 <0x02000000 0x0 0x60300000 0 0x60300000 0x0 0x3d00000>;
> >  
> > -			interrupts = <GIC_SPI 141 IRQ_TYPE_LEVEL_HIGH>;
> > -			interrupt-names = "msi";
> > -			#interrupt-cells = <1>;
> > +			msi-map = <0x0 &gic_its 0x5980 0x1>,
> > +				  <0x100 &gic_its 0x5981 0x1>;
> > +			msi-map-mask = <0xff00>;
> >  			interrupt-map-mask = <0 0 0 0x7>;
> >  			interrupt-map = <0 0 0 1 &intc 0 0 0 149 IRQ_TYPE_LEVEL_HIGH>, /* int_a */
> >  					<0 0 0 2 &intc 0 0 0 150 IRQ_TYPE_LEVEL_HIGH>, /* int_b */
> > @@ -1842,9 +1842,9 @@ pcie1: pci@1c08000 {
> >  			ranges = <0x01000000 0x0 0x40200000 0 0x40200000 0x0 0x100000>,
> >  				 <0x02000000 0x0 0x40300000 0 0x40300000 0x0 0x1fd00000>;
> >  
> > -			interrupts = <GIC_SPI 307 IRQ_TYPE_LEVEL_HIGH>;
> > -			interrupt-names = "msi";
> > -			#interrupt-cells = <1>;
> > +			msi-map = <0x0 &gic_its 0x5a01 0x1>,
> > +				  <0x100 &gic_its 0x5a00 0x1>;
> > +			msi-map-mask = <0xff00>;
> >  			interrupt-map-mask = <0 0 0 0x7>;
> >  			interrupt-map = <0 0 0 1 &intc 0 0 0 434 IRQ_TYPE_LEVEL_HIGH>, /* int_a */
> >  					<0 0 0 2 &intc 0 0 0 435 IRQ_TYPE_LEVEL_HIGH>, /* int_b */
diff mbox series

Patch

diff --git a/arch/arm64/boot/dts/qcom/sm8450.dtsi b/arch/arm64/boot/dts/qcom/sm8450.dtsi
index 570475040d95..276ceba4c247 100644
--- a/arch/arm64/boot/dts/qcom/sm8450.dtsi
+++ b/arch/arm64/boot/dts/qcom/sm8450.dtsi
@@ -1733,9 +1733,9 @@  pcie0: pci@1c00000 {
 			ranges = <0x01000000 0x0 0x60200000 0 0x60200000 0x0 0x100000>,
 				 <0x02000000 0x0 0x60300000 0 0x60300000 0x0 0x3d00000>;
 
-			interrupts = <GIC_SPI 141 IRQ_TYPE_LEVEL_HIGH>;
-			interrupt-names = "msi";
-			#interrupt-cells = <1>;
+			msi-map = <0x0 &gic_its 0x5980 0x1>,
+				  <0x100 &gic_its 0x5981 0x1>;
+			msi-map-mask = <0xff00>;
 			interrupt-map-mask = <0 0 0 0x7>;
 			interrupt-map = <0 0 0 1 &intc 0 0 0 149 IRQ_TYPE_LEVEL_HIGH>, /* int_a */
 					<0 0 0 2 &intc 0 0 0 150 IRQ_TYPE_LEVEL_HIGH>, /* int_b */
@@ -1842,9 +1842,9 @@  pcie1: pci@1c08000 {
 			ranges = <0x01000000 0x0 0x40200000 0 0x40200000 0x0 0x100000>,
 				 <0x02000000 0x0 0x40300000 0 0x40300000 0x0 0x1fd00000>;
 
-			interrupts = <GIC_SPI 307 IRQ_TYPE_LEVEL_HIGH>;
-			interrupt-names = "msi";
-			#interrupt-cells = <1>;
+			msi-map = <0x0 &gic_its 0x5a01 0x1>,
+				  <0x100 &gic_its 0x5a00 0x1>;
+			msi-map-mask = <0xff00>;
 			interrupt-map-mask = <0 0 0 0x7>;
 			interrupt-map = <0 0 0 1 &intc 0 0 0 434 IRQ_TYPE_LEVEL_HIGH>, /* int_a */
 					<0 0 0 2 &intc 0 0 0 435 IRQ_TYPE_LEVEL_HIGH>, /* int_b */