drm/xe/vf: Don't try to read legacy GuC MMIO notification if VF

Legacy SOFT_SCRATCH registers are not accessible from the VF. Any
G2H notification posted there will be handled by the PF driver.

Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Reviewed-by: Himal Prasad Ghimiray <himal.prasad.ghimiray@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240405133936.891-4-michal.wajdeczko@intel.com

diff --git a/drivers/gpu/drm/xe/xe_guc.c b/drivers/gpu/drm/xe/xe_guc.c
index 59fe73770711a458a79d70347ebe7a349121f65e..240e7a4bbff1a9e31b2c9d9bb12a5fc8fd012ee2 100644 (file)
--- a/drivers/gpu/drm/xe/xe_guc.c
+++ b/drivers/gpu/drm/xe/xe_guc.c
@@ -591,6 +591,9 @@ static void guc_handle_mmio_msg(struct xe_guc *guc)
        struct xe_gt *gt = guc_to_gt(guc);
        u32 msg;
 
+       if (IS_SRIOV_VF(guc_to_xe(guc)))
+               return;
+
        xe_force_wake_assert_held(gt_to_fw(gt), XE_FW_GT);
 
        msg = xe_mmio_read32(gt, SOFT_SCRATCH(15));