diff options
| author | Piotr Piórkowski <piotr.piorkowski@intel.com> | 2026-03-09 18:24:48 +0300 |
|---|---|---|
| committer | Michał Winiarski <michal.winiarski@intel.com> | 2026-03-24 12:47:52 +0300 |
| commit | 2de36e3f72dae2035b2742ffe3355e43067a81ad (patch) | |
| tree | 30d3451ef92c8ecee7649b9277ca2222cd9ff76e /include | |
| parent | a31566762d4075646a8a2214586158b681e94305 (diff) | |
| download | linux-2de36e3f72dae2035b2742ffe3355e43067a81ad.tar.xz | |
drm/xe/pf: Add FLR_PREPARE state to VF control flow
Our xe-vfio-pci component relies on the confirmation from the PF
that VF FLR processing has finished, but due to the notification
latency on the HW/FW side, PF might be unaware yet of the already
triggered VF FLR.
Update VF state machine with new FLR_PREPARE state that indicate
imminent VF FLR notification and treat that as a begin of the FLR
sequence. Also introduce function that xe-vfio-pci should call to
guarantee correct synchronization.
v2: move PREPARE into WIP, update commit msg (Michal)
Signed-off-by: Piotr Piórkowski <piotr.piorkowski@intel.com>
Co-developed-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Reviewed-by: Michał Winiarski <michal.winiarski@intel.com>
Link: https://patch.msgid.link/20260309152449.910636-2-piotr.piorkowski@intel.com
Signed-off-by: Michał Winiarski <michal.winiarski@intel.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/drm/intel/xe_sriov_vfio.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/include/drm/intel/xe_sriov_vfio.h b/include/drm/intel/xe_sriov_vfio.h index e9814e8149fd..27c224a70e6f 100644 --- a/include/drm/intel/xe_sriov_vfio.h +++ b/include/drm/intel/xe_sriov_vfio.h @@ -28,6 +28,17 @@ struct xe_device *xe_sriov_vfio_get_pf(struct pci_dev *pdev); bool xe_sriov_vfio_migration_supported(struct xe_device *xe); /** + * xe_sriov_vfio_flr_prepare() - Notify PF that VF FLR prepare has started. + * @xe: the PF &xe_device obtained by calling xe_sriov_vfio_get_pf() + * @vfid: the VF identifier (can't be 0) + * + * This function marks VF FLR as pending before PF receives GuC FLR event. + * + * Return: 0 on success or a negative error code on failure. + */ +int xe_sriov_vfio_flr_prepare(struct xe_device *xe, unsigned int vfid); + +/** * xe_sriov_vfio_wait_flr_done() - Wait for VF FLR completion. * @xe: the PF &xe_device obtained by calling xe_sriov_vfio_get_pf() * @vfid: the VF identifier (can't be 0) |