drm/xe: declare wedged upon GuC load failure

Let's block the device upon any GuC load failure.
But let's continue with the probe so guc logs can be read
from the debugfs.

v2: - s/wedged/busted
    - do not block probe or we lose guc_logs in debugfs (Matt)

v3: - s/busted/wedged

v4: Do not change __xe_guc_upload return. (Himal)

Cc: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Reviewed-by: Himal Prasad Ghimiray <himal.prasad.ghimiray@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240423221817.1285081-2-rodrigo.vivi@intel.com
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>

drivers/gpu/drm/xe/xe_guc.c

@@ -451,7 +451,7 @@ static int guc_xfer_rsa(struct xe_guc *guc)
 	return 0;
 }
 
-static int guc_wait_ucode(struct xe_guc *guc)
+static void guc_wait_ucode(struct xe_guc *guc)
 {
 	struct xe_gt *gt = guc_to_gt(guc);
 	u32 status;
@@ -479,30 +479,26 @@ static int guc_wait_ucode(struct xe_guc *guc)
 			     200000, &status, false);
 
 	if (ret) {
-		xe_gt_info(gt, "GuC load failed: status = 0x%08X\n", status);
-		xe_gt_info(gt, "GuC status: Reset = %u, BootROM = %#X, UKernel = %#X, MIA = %#X, Auth = %#X\n",
-			   REG_FIELD_GET(GS_MIA_IN_RESET, status),
-			   REG_FIELD_GET(GS_BOOTROM_MASK, status),
-			   REG_FIELD_GET(GS_UKERNEL_MASK, status),
-			   REG_FIELD_GET(GS_MIA_MASK, status),
-			   REG_FIELD_GET(GS_AUTH_STATUS_MASK, status));
-
-		if ((status & GS_BOOTROM_MASK) == GS_BOOTROM_RSA_FAILED) {
-			xe_gt_info(gt, "GuC firmware signature verification failed\n");
-			ret = -ENOEXEC;
-		}
+		xe_gt_err(gt, "GuC load failed: status = 0x%08X\n", status);
+		xe_gt_err(gt, "GuC status: Reset = %u, BootROM = %#X, UKernel = %#X, MIA = %#X, Auth = %#X\n",
+			  REG_FIELD_GET(GS_MIA_IN_RESET, status),
+			  REG_FIELD_GET(GS_BOOTROM_MASK, status),
+			  REG_FIELD_GET(GS_UKERNEL_MASK, status),
+			  REG_FIELD_GET(GS_MIA_MASK, status),
+			  REG_FIELD_GET(GS_AUTH_STATUS_MASK, status));
+
+		if ((status & GS_BOOTROM_MASK) == GS_BOOTROM_RSA_FAILED)
+			xe_gt_err(gt, "GuC firmware signature verification failed\n");
 
 		if (REG_FIELD_GET(GS_UKERNEL_MASK, status) ==
-		    XE_GUC_LOAD_STATUS_EXCEPTION) {
-			xe_gt_info(gt, "GuC firmware exception. EIP: %#x\n",
-				   xe_mmio_read32(gt, SOFT_SCRATCH(13)));
-			ret = -ENXIO;
-		}
+		    XE_GUC_LOAD_STATUS_EXCEPTION)
+			xe_gt_err(gt, "GuC firmware exception. EIP: %#x\n",
+				  xe_mmio_read32(gt, SOFT_SCRATCH(13)));
+
+		xe_device_declare_wedged(gt_to_xe(gt));
 	} else {
 		xe_gt_dbg(gt, "GuC successfully loaded\n");
 	}
-
-	return ret;
 }
 
 static int __xe_guc_upload(struct xe_guc *guc)
@@ -532,9 +528,7 @@ static int __xe_guc_upload(struct xe_guc *guc)
 		goto out;
 
 	/* Wait for authentication */
-	ret = guc_wait_ucode(guc);
-	if (ret)
-		goto out;
+	guc_wait_ucode(guc);
 
 	xe_uc_fw_change_status(&guc->fw, XE_UC_FIRMWARE_RUNNING);
 	return 0;