diff options
| author | Michał Winiarski <michal.winiarski@intel.com> | 2025-11-12 14:22:19 +0100 |
|---|---|---|
| committer | Michał Winiarski <michal.winiarski@intel.com> | 2025-11-13 11:48:20 +0100 |
| commit | 3b358c21f93e0e83993c991bb208ae78e0253af9 (patch) | |
| tree | 26c5b6e5a6ccc089a2dbe72167e9b6142414ff79 | |
| parent | 49cf1b9b609feabd1f311aca09dded317a4df7ca (diff) | |
drm/xe/pf: Add wait helper for VF FLR
VF FLR requires additional processing done by PF driver.
The processing is done after FLR is already finished from PCIe
perspective.
In order to avoid a scenario where migration state transitions while
PF processing is still in progress, additional synchronization
point is needed.
Add a helper that will be used as part of VF driver struct
pci_error_handlers .reset_done() callback.
Reviewed-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Link: https://patch.msgid.link/20251112132220.516975-24-michal.winiarski@intel.com
Signed-off-by: Michał Winiarski <michal.winiarski@intel.com>
| -rw-r--r-- | drivers/gpu/drm/xe/xe_sriov_pf_control.c | 24 | ||||
| -rw-r--r-- | drivers/gpu/drm/xe/xe_sriov_pf_control.h | 1 |
2 files changed, 25 insertions, 0 deletions
diff --git a/drivers/gpu/drm/xe/xe_sriov_pf_control.c b/drivers/gpu/drm/xe/xe_sriov_pf_control.c index 86668bd4213e..ed4b9820b06e 100644 --- a/drivers/gpu/drm/xe/xe_sriov_pf_control.c +++ b/drivers/gpu/drm/xe/xe_sriov_pf_control.c @@ -124,6 +124,30 @@ int xe_sriov_pf_control_reset_vf(struct xe_device *xe, unsigned int vfid) } /** + * xe_sriov_pf_control_wait_flr() - Wait for a VF reset (FLR) to complete. + * @xe: the &xe_device + * @vfid: the VF identifier + * + * This function is for PF only. + * + * Return: 0 on success or a negative error code on failure. + */ +int xe_sriov_pf_control_wait_flr(struct xe_device *xe, unsigned int vfid) +{ + struct xe_gt *gt; + unsigned int id; + int result = 0; + int err; + + for_each_gt(gt, xe, id) { + err = xe_gt_sriov_pf_control_wait_flr(gt, vfid); + result = result ? -EUCLEAN : err; + } + + return result; +} + +/** * xe_sriov_pf_control_sync_flr() - Synchronize a VF FLR between all GTs. * @xe: the &xe_device * @vfid: the VF identifier diff --git a/drivers/gpu/drm/xe/xe_sriov_pf_control.h b/drivers/gpu/drm/xe/xe_sriov_pf_control.h index 30318c1fba34..ef9f219b2109 100644 --- a/drivers/gpu/drm/xe/xe_sriov_pf_control.h +++ b/drivers/gpu/drm/xe/xe_sriov_pf_control.h @@ -12,6 +12,7 @@ int xe_sriov_pf_control_pause_vf(struct xe_device *xe, unsigned int vfid); int xe_sriov_pf_control_resume_vf(struct xe_device *xe, unsigned int vfid); int xe_sriov_pf_control_stop_vf(struct xe_device *xe, unsigned int vfid); int xe_sriov_pf_control_reset_vf(struct xe_device *xe, unsigned int vfid); +int xe_sriov_pf_control_wait_flr(struct xe_device *xe, unsigned int vfid); int xe_sriov_pf_control_sync_flr(struct xe_device *xe, unsigned int vfid); int xe_sriov_pf_control_trigger_save_vf(struct xe_device *xe, unsigned int vfid); int xe_sriov_pf_control_finish_save_vf(struct xe_device *xe, unsigned int vfid); |