Re: [PATCH] arm64: dts: qcom: sm8650: Use GIC-ITS for PCIe0 and PCIe1

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On 01/02/2024 20:59, Konrad Dybcio wrote:
On 25.01.2024 17:55, Neil Armstrong wrote:
Both PCIe0 and PCIe1 controllers are capable of signalling the MSIs
received from endpoint devices to the CPU using GIC-ITS MSI controller.
Add support for it.

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.

Like SM8450 & SM8550, the IDs are swapped, but works fine on PCIe0 and PCIe1.

WiFi PCIe Device on SM8650-QRD using GIC-ITS:
159:          0          0          0          0          0          0          0          0   ITS-MSI   0 Edge      PCIe PME, aerdrv
167:          0          4          0          0          0          0          0          0   ITS-MSI 524288 Edge      bhi
168:          0          0          4          0          0          0          0          0   ITS-MSI 524289 Edge      mhi
169:          0          0          0         34          0          0          0          0   ITS-MSI 524290 Edge      mhi
170:          0          0          0          0          3          0          0          0   ITS-MSI 524291 Edge      ce0
171:          0          0          0          0          0          2          0          0   ITS-MSI 524292 Edge      ce1
172:          0          0          0          0          0          0        806          0   ITS-MSI 524293 Edge      ce2
173:          0          0          0          0          0          0          0         76   ITS-MSI 524294 Edge      ce3
174:          0          0          0          0          0          0          0          0   ITS-MSI 524295 Edge      ce5
175:          0         13          0          0          0          0          0          0   ITS-MSI 524296 Edge      DP_EXT_IRQ
176:          0          0          0          0          0          0          0          0   ITS-MSI 524297 Edge      DP_EXT_IRQ

Is it by chance that this one never fired?

Yeah I only associated to an SSID and did a simple iperf, not enough to trigger all MSIs

Neil


(lgtm otherwise)

Konrad





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