From: Neil Armstrong <neil.armstrong@linaro.org>
To: Konrad Dybcio <konrad.dybcio@linaro.org>,
Bjorn Andersson <andersson@kernel.org>,
Rob Herring <robh+dt@kernel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
Conor Dooley <conor+dt@kernel.org>
Cc: linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH] arm64: dts: qcom: sm8650: Use GIC-ITS for PCIe0 and PCIe1
Date: Fri, 2 Feb 2024 09:03:12 +0100 [thread overview]
Message-ID: <6f89dd4f-aae5-4221-9a0a-bebbef862229@linaro.org> (raw)
In-Reply-To: <0cf69024-a3e6-4be2-89ce-017ae521721d@linaro.org>
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
next prev parent reply other threads:[~2024-02-02 8:03 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-01-25 16:55 Neil Armstrong
2024-02-01 19:59 ` Konrad Dybcio
2024-02-02 8:03 ` Neil Armstrong [this message]
2024-02-02 12:24 ` Konrad Dybcio
2024-02-03 17:06 ` Bjorn Andersson
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