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| author | Koichiro Den <den@valinux.co.jp> | 2026-10-15 10:44:02 +0900 |
|---|---|---|
| committer | Manivannan Sadhasivam <manivannan.sadhasivam@oss.qualcomm.com> | 2026-10-17 13:57:57 +0530 |
| commit | a5401ce3ab2356b7861f53d09205008b7a49d57e (patch) | |
| tree | 34fbd9b1c010b29aabc513b835c528f46d34a088 /tools/perf/scripts/python/stackcollapse.py | |
| parent | 17c4115cbe99da4d147aee778c308da1d4bb000d (diff) | |
PCI: endpoint: pci-epf-vntb: Honor MSI-X selection
ntb_hw_epf tries MSI-X first and falls back to MSI. It reports the
result in COMMAND_CONFIGURE_DOORBELL. pci-epf-vntb ignores MSIX_ENABLE,
configures only MSI, and always raises peer interrupts with PCI_IRQ_MSI.
When MSI-X is selected, the host does not program MSI, so raising it can
issue a write to an invalid address. This was observed as IOMMU faults
on the RC, with no doorbell interrupts delivered.
Configure MSI-X when supported and use the selected type for peer
doorbells and link events. Allocate the MSI-X Table and PBA in the config
BAR and configure db_count entries. Use this EPF-owned layout even if the
EPC has fixed, hardware-owned Table/PBA regions, as pci-epf-test and
nvmet-pci-epf already do.
Fixes: e35f56bb0330 ("PCI: endpoint: Support NTB transfer between RC and EP")
Signed-off-by: Koichiro Den <den@valinux.co.jp>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@oss.qualcomm.com>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Link: https://patch.msgid.link/20261015014402.2976188-3-den@valinux.co.jp
Diffstat (limited to 'tools/perf/scripts/python/stackcollapse.py')
0 files changed, 0 insertions, 0 deletions