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a33a532b3b
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 177: 0 0 0 5493 0 0 0 0 ITS-MSI 524298 Edge DP_EXT_IRQ 178: 0 0 0 0 82 0 0 0 ITS-MSI 524299 Edge DP_EXT_IRQ 179: 0 0 0 0 0 7204 0 0 ITS-MSI 524300 Edge DP_EXT_IRQ 180: 0 0 0 0 0 0 672 0 ITS-MSI 524301 Edge DP_EXT_IRQ 181: 0 0 0 0 0 0 0 30 ITS-MSI 524302 Edge DP_EXT_IRQ Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org> Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org> Link: https://lore.kernel.org/r/20240125-topic-sm8650-upstream-pcie-its-v1-1-cb506deeb43e@linaro.org Signed-off-by: Bjorn Andersson <andersson@kernel.org> |
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Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.