drm/xe/vf: Custom GuC reset

The VF drivers can't trigger real GuC firmware reset using GDRST
register, but for the VF drivers it is sufficient to send VF_RESET
message to reset any VF specific state maintained by the GuC.
Use our existing VF bootstrap function as VF_RESET is part of it.

Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Reviewed-by: Piotr Piórkowski <piotr.piorkowski@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240604212231.1416-4-michal.wajdeczko@intel.com

diff --git a/drivers/gpu/drm/xe/xe_guc.c b/drivers/gpu/drm/xe/xe_guc.c
index 086a048..0bf6e01 100644 (file)
--- a/drivers/gpu/drm/xe/xe_guc.c
+++ b/drivers/gpu/drm/xe/xe_guc.c
@@ -430,6 +430,9 @@ int xe_guc_reset(struct xe_guc *guc)
 
        xe_force_wake_assert_held(gt_to_fw(gt), XE_FW_GT);
 
+       if (IS_SRIOV_VF(gt_to_xe(gt)))
+               return xe_gt_sriov_vf_bootstrap(gt);
+
        xe_mmio_write32(gt, GDRST, GRDOM_GUC);
 
        ret = xe_mmio_wait32(gt, GDRST, GRDOM_GUC, 0, 5000, &gdrst, false);