Re: [PATCH 2/4] drm/i915/guc: Improved reporting when GuC fails to load

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On 9/25/2020 4:26 PM, John.C.Harrison@xxxxxxxxx wrote:
From: John Harrison <John.C.Harrison@xxxxxxxxx>

Rather than just saying 'GuC failed to load: -110', actually print out
the GuC status register and break it down into the individual fields.

Signed-off-by: John Harrison <John.C.Harrison@xxxxxxxxx>

Reviewed-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@xxxxxxxxx>

Daniele

---
  drivers/gpu/drm/i915/gt/uc/intel_guc_fw.c | 31 ++++++++++++++++-------
  1 file changed, 22 insertions(+), 9 deletions(-)

diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_fw.c b/drivers/gpu/drm/i915/gt/uc/intel_guc_fw.c
index d4a87f4c9421..f9d0907ea1a5 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc_fw.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_fw.c
@@ -76,6 +76,7 @@ static inline bool guc_ready(struct intel_uncore *uncore, u32 *status)
static int guc_wait_ucode(struct intel_uncore *uncore)
  {
+	struct drm_device *drm = &uncore->i915->drm;
  	u32 status;
  	int ret;
@@ -90,15 +91,27 @@ static int guc_wait_ucode(struct intel_uncore *uncore)
  	ret = wait_for(guc_ready(uncore, &status), 100);
  	DRM_DEBUG_DRIVER("GuC status %#x\n", status);
- if ((status & GS_BOOTROM_MASK) == GS_BOOTROM_RSA_FAILED) {
-		DRM_ERROR("GuC firmware signature verification failed\n");
-		ret = -ENOEXEC;
-	}
-
-	if ((status & GS_UKERNEL_MASK) == GS_UKERNEL_EXCEPTION) {
-		DRM_ERROR("GuC firmware exception. EIP: %#x\n",
-			  intel_uncore_read(uncore, SOFT_SCRATCH(13)));
-		ret = -ENXIO;
+	if (ret) {
+		drm_err(drm, "GuC load failed: status = 0x%08X\n", status);
+		drm_err(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),
+			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) {
+			drm_err(drm, "GuC firmware signature verification failed\n");
+			ret = -ENOEXEC;
+		}
+
+		if ((status & GS_UKERNEL_MASK) == GS_UKERNEL_EXCEPTION) {
+			drm_err(drm, "GuC firmware exception. EIP: %#x\n",
+				intel_uncore_read(uncore, SOFT_SCRATCH(13)));
+			ret = -ENXIO;
+		}
  	}
return ret;

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