From: Michał Winiarski Date: Wed, 12 Nov 2025 13:22:19 +0000 (+0100) Subject: drm/xe/pf: Add wait helper for VF FLR X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=3b358c21f93e0e83993c991bb208ae78e0253af9;p=thirdparty%2Fkernel%2Flinux.git 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 Link: https://patch.msgid.link/20251112132220.516975-24-michal.winiarski@intel.com Signed-off-by: Michał Winiarski --- diff --git a/drivers/gpu/drm/xe/xe_sriov_pf_control.c b/drivers/gpu/drm/xe/xe_sriov_pf_control.c index 86668bd4213e0..ed4b9820b06e4 100644 --- a/drivers/gpu/drm/xe/xe_sriov_pf_control.c +++ b/drivers/gpu/drm/xe/xe_sriov_pf_control.c @@ -123,6 +123,30 @@ int xe_sriov_pf_control_reset_vf(struct xe_device *xe, unsigned int vfid) return result; } +/** + * 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 diff --git a/drivers/gpu/drm/xe/xe_sriov_pf_control.h b/drivers/gpu/drm/xe/xe_sriov_pf_control.h index 30318c1fba34e..ef9f219b21096 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);