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drm/xe/pf: Split VF FLR processing function

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On multi-GT platforms (like PTL) we may want to run VF FLR on each
GuC (render and media) in parallel. Split our FLR function to allow
to wait for GT VF FLR completion separately.

Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Reviewed-by: Michał Winiarski <michal.winiarski@intel.com>
Link: https://lore.kernel.org/r/20250930233525.201263-6-michal.wajdeczko@intel.com
This commit is contained in:
Michal Wajdeczko 2025-10-01 01:35:23 +02:00
parent 1f018c8496
commit 03dc00c782
3 changed files with 27 additions and 1 deletions
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22
drivers/gpu/drm/xe/xe_gt_sriov_pf_control.c
View File

@ -1172,11 +1172,31 @@ static void pf_enter_vf_flr_guc_done(struct xe_gt *gt, unsigned int vfid)
* Return: 0 on success or a negative error code on failure.
*/
int xe_gt_sriov_pf_control_trigger_flr(struct xe_gt *gt, unsigned int vfid)
{
pf_enter_vf_flr_wip(gt, vfid);
return 0;
}
/**
* xe_gt_sriov_pf_control_wait_flr() - Wait for a VF FLR to complete.
* @gt: the &xe_gt
* @vfid: the VF identifier
*
* This function is for PF only.
*
* Return: 0 on success or a negative error code on failure.
*/
int xe_gt_sriov_pf_control_wait_flr(struct xe_gt *gt, unsigned int vfid)
{
unsigned long timeout = pf_get_default_timeout(XE_GT_SRIOV_STATE_FLR_WIP);
int err;
pf_enter_vf_flr_wip(gt, vfid);
if (pf_check_vf_state(gt, vfid, XE_GT_SRIOV_STATE_FLR_FAILED))
return -EIO;
if (!pf_check_vf_state(gt, vfid, XE_GT_SRIOV_STATE_FLR_WIP))
return 0;
err = pf_wait_vf_wip_done(gt, vfid, timeout);
if (err) {

1
drivers/gpu/drm/xe/xe_gt_sriov_pf_control.h
View File

@ -18,6 +18,7 @@ int xe_gt_sriov_pf_control_pause_vf(struct xe_gt *gt, unsigned int vfid);
int xe_gt_sriov_pf_control_resume_vf(struct xe_gt *gt, unsigned int vfid);
int xe_gt_sriov_pf_control_stop_vf(struct xe_gt *gt, unsigned int vfid);
int xe_gt_sriov_pf_control_trigger_flr(struct xe_gt *gt, unsigned int vfid);
int xe_gt_sriov_pf_control_wait_flr(struct xe_gt *gt, unsigned int vfid);
#ifdef CONFIG_PCI_IOV
int xe_gt_sriov_pf_control_process_guc2pf(struct xe_gt *gt, const u32 *msg, u32 len);

5
drivers/gpu/drm/xe/xe_sriov_pf_control.c
View File

@ -113,5 +113,10 @@ int xe_sriov_pf_control_reset_vf(struct xe_device *xe, unsigned int vfid)
result = result ? -EUCLEAN : err;
}
for_each_gt(gt, xe, id) {
err = xe_gt_sriov_pf_control_wait_flr(gt, vfid);
result = result ? -EUCLEAN : err;
}
return result;
}