diff options
| -rw-r--r-- | drivers/gpu/drm/xe/xe_gt_sriov_pf_control.c | 54 |
1 files changed, 28 insertions, 26 deletions
diff --git a/drivers/gpu/drm/xe/xe_gt_sriov_pf_control.c b/drivers/gpu/drm/xe/xe_gt_sriov_pf_control.c index ebf06e037750..d11839d9e7d4 100644 --- a/drivers/gpu/drm/xe/xe_gt_sriov_pf_control.c +++ b/drivers/gpu/drm/xe/xe_gt_sriov_pf_control.c @@ -153,33 +153,35 @@ int xe_gt_sriov_pf_control_trigger_flr(struct xe_gt *gt, unsigned int vfid) /** * DOC: The VF FLR Flow with GuC * - * PF GUC PCI - * ======================================================== - * | | | - * (1) | [ ] <----- FLR --| - * | [ ] : - * (2) [ ] <-------- NOTIFY FLR --[ ] - * [ ] | - * (3) [ ] | - * [ ] | - * [ ]-- START FLR ---------> [ ] - * | [ ] - * (4) | [ ] - * | [ ] - * [ ] <--------- FLR DONE -- [ ] - * [ ] | - * (5) [ ] | - * [ ] | - * [ ]-- FINISH FLR --------> [ ] - * | | + * The VF FLR flow includes several steps:: * - * Step 1: PCI HW generates interrupt to the GuC about VF FLR - * Step 2: GuC FW sends G2H notification to the PF about VF FLR - * Step 2a: on some platforms G2H is only received from root GuC - * Step 3: PF sends H2G request to the GuC to start VF FLR sequence - * Step 3a: on some platforms PF must send H2G to all other GuCs - * Step 4: GuC FW performs VF FLR cleanups and notifies the PF when done - * Step 5: PF performs VF FLR cleanups and notifies the GuC FW when finished + * PF GUC PCI + * ======================================================== + * | | | + * (1) | [ ] <----- FLR --| + * | [ ] : + * (2) [ ] <-------- NOTIFY FLR --[ ] + * [ ] | + * (3) [ ] | + * [ ] | + * [ ]-- START FLR ---------> [ ] + * | [ ] + * (4) | [ ] + * | [ ] + * [ ] <--------- FLR DONE -- [ ] + * [ ] | + * (5) [ ] | + * [ ] | + * [ ]-- FINISH FLR --------> [ ] + * | | + * + * * Step 1: PCI HW generates interrupt to the GuC about VF FLR + * * Step 2: GuC FW sends G2H notification to the PF about VF FLR + * * Step 2a: on some platforms G2H is only received from root GuC + * * Step 3: PF sends H2G request to the GuC to start VF FLR sequence + * * Step 3a: on some platforms PF must send H2G to all other GuCs + * * Step 4: GuC FW performs VF FLR cleanups and notifies the PF when done + * * Step 5: PF performs VF FLR cleanups and notifies the GuC FW when finished */ static bool needs_dispatch_flr(struct xe_device *xe) |