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114990ce3e
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, the IDs are swapped, but works fine on PCIe0 and PCIe1. WiFi PCIe Device on SM8550-QRD using GIC-ITS: 218: 0 4 0 0 0 0 0 0 ITS-MSI 524288 Edge bhi 219: 0 0 5 0 0 0 0 0 ITS-MSI 524289 Edge mhi 220: 0 0 0 33 0 0 0 0 ITS-MSI 524290 Edge mhi 221: 0 0 0 0 3 0 0 0 ITS-MSI 524291 Edge ce0 222: 0 0 0 0 0 1 0 0 ITS-MSI 524292 Edge ce1 223: 0 0 0 0 0 0 38 0 ITS-MSI 524293 Edge ce2 224: 0 0 0 0 0 0 0 31 ITS-MSI 524294 Edge ce3 225: 0 0 0 0 0 0 0 0 ITS-MSI 524295 Edge ce5 226: 0 0 0 0 0 0 0 0 ITS-MSI 524296 Edge DP_EXT_IRQ 227: 0 0 0 0 0 0 0 0 ITS-MSI 524297 Edge DP_EXT_IRQ 228: 0 0 0 0 0 0 0 0 ITS-MSI 524298 Edge DP_EXT_IRQ 229: 0 0 0 0 0 0 0 0 ITS-MSI 524299 Edge DP_EXT_IRQ 230: 0 0 0 0 0 0 0 0 ITS-MSI 524300 Edge DP_EXT_IRQ 231: 0 0 0 0 0 0 0 0 ITS-MSI 524301 Edge DP_EXT_IRQ 232: 0 0 0 0 0 0 0 0 ITS-MSI 524302 Edge DP_EXT_IRQ NVMe in SM8550-HDK M.2 Slot using GIC-ITS: 212: 0 0 22 0 0 0 0 0 ITS-MSI 134742016 Edge nvme0q0 213: 133098 0 0 0 0 0 0 0 ITS-MSI 134742017 Edge nvme0q1 214: 0 139450 0 0 0 0 0 0 ITS-MSI 134742018 Edge nvme0q2 215: 0 0 139476 0 0 0 0 0 ITS-MSI 134742019 Edge nvme0q3 216: 0 0 0 69767 0 0 0 0 ITS-MSI 134742020 Edge nvme0q4 217: 0 0 0 0 80368 0 0 0 ITS-MSI 134742021 Edge nvme0q5 218: 0 0 0 0 0 77315 0 0 ITS-MSI 134742022 Edge nvme0q6 219: 0 0 0 0 0 0 73022 0 ITS-MSI 134742023 Edge nvme0q7 220: 0 0 0 0 0 0 0 329993 ITS-MSI 134742024 Edge nvme0q8 Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org> Link: https://lore.kernel.org/r/20240122-topic-sm8550-upstream-pcie-its-v2-1-b3398d86d1f1@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.