drm/i915/guc: Improve GuC loading status check/error reports

If the GuC fails to load, it is useful to know what firmware file /
version was attempted. So move the version info report to before the
load attempt rather than only after a successful load.

If the GuC does fail to load, then make the error messages visible
rather than being 'debug' prints that do not appears in dmesg output
by default.

When waiting for the GuC to load, it used to be necessary to check for
two different states - READY and (LAPIC_DONE | MIA_CORE). Apparently
the second signified init complete on RC6 exit. However, in more
recent GuC versions the RC6 exit sequence now finishes with status
READY as well. So the test can be simplified.

Also, add an enum giving all the current status codes that GuC loading
can report as a reference without having to pull and search through
the GuC source files.
Signed-off-by: NJohn Harrison <John.C.Harrison@Intel.com>
Reviewed-by: NMatthew Brost <matthew.brost@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220107000622.292081-4-John.C.Harrison@Intel.com

drivers/gpu/drm/i915/gt/uc/abi/guc_errors_abi.h

@@ -11,4 +11,27 @@ enum intel_guc_response_status {
 	INTEL_GUC_RESPONSE_STATUS_GENERIC_FAIL = 0xF000,
 };
 
+enum intel_guc_load_status {
+	INTEL_GUC_LOAD_STATUS_DEFAULT                          = 0x00,
+	INTEL_GUC_LOAD_STATUS_START                            = 0x01,
+	INTEL_GUC_LOAD_STATUS_ERROR_DEVID_BUILD_MISMATCH       = 0x02,
+	INTEL_GUC_LOAD_STATUS_GUC_PREPROD_BUILD_MISMATCH       = 0x03,
+	INTEL_GUC_LOAD_STATUS_ERROR_DEVID_INVALID_GUCTYPE      = 0x04,
+	INTEL_GUC_LOAD_STATUS_GDT_DONE                         = 0x10,
+	INTEL_GUC_LOAD_STATUS_IDT_DONE                         = 0x20,
+	INTEL_GUC_LOAD_STATUS_LAPIC_DONE                       = 0x30,
+	INTEL_GUC_LOAD_STATUS_GUCINT_DONE                      = 0x40,
+	INTEL_GUC_LOAD_STATUS_DPC_READY                        = 0x50,
+	INTEL_GUC_LOAD_STATUS_DPC_ERROR                        = 0x60,
+	INTEL_GUC_LOAD_STATUS_EXCEPTION                        = 0x70,
+	INTEL_GUC_LOAD_STATUS_INIT_DATA_INVALID                = 0x71,
+	INTEL_GUC_LOAD_STATUS_PXP_TEARDOWN_CTRL_ENABLED        = 0x72,
+	INTEL_GUC_LOAD_STATUS_INVALID_INIT_DATA_RANGE_START,
+	INTEL_GUC_LOAD_STATUS_MPU_DATA_INVALID                 = 0x73,
+	INTEL_GUC_LOAD_STATUS_INIT_MMIO_SAVE_RESTORE_INVALID   = 0x74,
+	INTEL_GUC_LOAD_STATUS_INVALID_INIT_DATA_RANGE_END,
+
+	INTEL_GUC_LOAD_STATUS_READY                            = 0xF0,
+};
+
 #endif /* _ABI_GUC_ERRORS_ABI_H */

drivers/gpu/drm/i915/gt/uc/intel_guc_fw.c

@@ -90,11 +90,10 @@ static int guc_xfer_rsa(struct intel_uc_fw *guc_fw,
 static inline bool guc_ready(struct intel_uncore *uncore, u32 *status)
 {
 	u32 val = intel_uncore_read(uncore, GUC_STATUS);
-	u32 uk_val = val & GS_UKERNEL_MASK;
+	u32 uk_val = REG_FIELD_GET(GS_UKERNEL_MASK, val);
 
 	*status = val;
-	return (uk_val == GS_UKERNEL_READY) ||
-		((val & GS_MIA_CORE_STATE) && (uk_val == GS_UKERNEL_LAPIC_DONE));
+	return uk_val == INTEL_GUC_LOAD_STATUS_READY;
 }
 
 static int guc_wait_ucode(struct intel_uncore *uncore)
@@ -123,8 +122,8 @@ static int guc_wait_ucode(struct intel_uncore *uncore)
 	if (ret) {
 		struct drm_device *drm = &uncore->i915->drm;
 
-		drm_dbg(drm, "GuC load failed: status = 0x%08X\n", status);
-		drm_dbg(drm, "GuC load failed: status: Reset = %d, "
+		drm_info(drm, "GuC load failed: status = 0x%08X\n", status);
+		drm_info(drm, "GuC load failed: status: Reset = %d, "
 			"BootROM = 0x%02X, UKernel = 0x%02X, "
 			"MIA = 0x%02X, Auth = 0x%02X\n",
 			REG_FIELD_GET(GS_MIA_IN_RESET, status),
@@ -134,13 +133,13 @@ static int guc_wait_ucode(struct intel_uncore *uncore)
 			REG_FIELD_GET(GS_AUTH_STATUS_MASK, status));
 
 		if ((status & GS_BOOTROM_MASK) == GS_BOOTROM_RSA_FAILED) {
-			drm_dbg(drm, "GuC firmware signature verification failed\n");
+			drm_info(drm, "GuC firmware signature verification failed\n");
 			ret = -ENOEXEC;
 		}
 
-		if ((status & GS_UKERNEL_MASK) == GS_UKERNEL_EXCEPTION) {
-			drm_dbg(drm, "GuC firmware exception. EIP: %#x\n",
-				intel_uncore_read(uncore, SOFT_SCRATCH(13)));
+		if (REG_FIELD_GET(GS_UKERNEL_MASK, status) == INTEL_GUC_LOAD_STATUS_EXCEPTION) {
+			drm_info(drm, "GuC firmware exception. EIP: %#x\n",
+				 intel_uncore_read(uncore, SOFT_SCRATCH(13)));
 			ret = -ENXIO;
 		}
 	}

drivers/gpu/drm/i915/gt/uc/intel_guc_reg.h

@@ -22,10 +22,6 @@
 #define   GS_BOOTROM_JUMP_PASSED	  (0x76 << GS_BOOTROM_SHIFT)
 #define   GS_UKERNEL_SHIFT		8
 #define   GS_UKERNEL_MASK		  (0xFF << GS_UKERNEL_SHIFT)
-#define   GS_UKERNEL_LAPIC_DONE		  (0x30 << GS_UKERNEL_SHIFT)
-#define   GS_UKERNEL_DPC_ERROR		  (0x60 << GS_UKERNEL_SHIFT)
-#define   GS_UKERNEL_EXCEPTION		  (0x70 << GS_UKERNEL_SHIFT)
-#define   GS_UKERNEL_READY		  (0xF0 << GS_UKERNEL_SHIFT)
 #define   GS_MIA_SHIFT			16
 #define   GS_MIA_MASK			  (0x07 << GS_MIA_SHIFT)
 #define   GS_MIA_CORE_STATE		  (0x01 << GS_MIA_SHIFT)

drivers/gpu/drm/i915/gt/uc/intel_huc.c

@@ -124,6 +124,7 @@ int intel_huc_auth(struct intel_huc *huc)
 	}
 
 	intel_uc_fw_change_status(&huc->fw, INTEL_UC_FIRMWARE_RUNNING);
+	drm_info(&gt->i915->drm, "HuC authenticated\n");
 	return 0;
 
 fail:

drivers/gpu/drm/i915/gt/uc/intel_uc.c

@@ -432,6 +432,15 @@ static int __uc_check_hw(struct intel_uc *uc)
 	return 0;
 }
 
+static void print_fw_ver(struct intel_uc *uc, struct intel_uc_fw *fw)
+{
+	struct drm_i915_private *i915 = uc_to_gt(uc)->i915;
+
+	drm_info(&i915->drm, "%s firmware %s version %u.%u\n",
+		 intel_uc_fw_type_repr(fw->type), fw->path,
+		 fw->major_ver_found, fw->minor_ver_found);
+}
+
 static int __uc_init_hw(struct intel_uc *uc)
 {
 	struct drm_i915_private *i915 = uc_to_gt(uc)->i915;
@@ -442,6 +451,11 @@ static int __uc_init_hw(struct intel_uc *uc)
 	GEM_BUG_ON(!intel_uc_supports_guc(uc));
 	GEM_BUG_ON(!intel_uc_wants_guc(uc));
 
+	print_fw_ver(uc, &guc->fw);
+
+	if (intel_uc_uses_huc(uc))
+		print_fw_ver(uc, &huc->fw);
+
 	if (!intel_uc_fw_is_loadable(&guc->fw)) {
 		ret = __uc_check_hw(uc) ||
 		      intel_uc_fw_is_overridden(&guc->fw) ||
@@ -507,24 +521,11 @@ static int __uc_init_hw(struct intel_uc *uc)
 		intel_rps_lower_unslice(&uc_to_gt(uc)->rps);
 	}
 
-	drm_info(&i915->drm, "%s firmware %s version %u.%u %s:%s\n",
-		 intel_uc_fw_type_repr(INTEL_UC_FW_TYPE_GUC), guc->fw.path,
-		 guc->fw.major_ver_found, guc->fw.minor_ver_found,
-		 "submission",
+	drm_info(&i915->drm, "GuC submission %s\n",
 		 enableddisabled(intel_uc_uses_guc_submission(uc)));
-
-	drm_info(&i915->drm, "GuC SLPC: %s\n",
+	drm_info(&i915->drm, "GuC SLPC %s\n",
 		 enableddisabled(intel_uc_uses_guc_slpc(uc)));
 
-	if (intel_uc_uses_huc(uc)) {
-		drm_info(&i915->drm, "%s firmware %s version %u.%u %s:%s\n",
-			 intel_uc_fw_type_repr(INTEL_UC_FW_TYPE_HUC),
-			 huc->fw.path,
-			 huc->fw.major_ver_found, huc->fw.minor_ver_found,
-			 "authenticated",
-			 yesno(intel_huc_is_authenticated(huc)));
-	}
-
 	return 0;
 
 	/*