drm/i915/guc: capture GuC logs if FW fails to load
We're currently deleting the GuC logs if the FW fails to load, but those
are still useful to understand why the loading failed. Keeping the
object around allows us to access them after driver load is completed.
v2: keep the object around instead of using kernel memory (chris)
don't store the logs in the gpu_error struct (Chris)
add a check on guc_log_level to avoid snapshotting empty logs
v3: use separate debugfs for error log (Chris)
v4: rebased
v5: clean up obj selection, move err_load inside guc_log, move err_load
cleanup, rename functions (Michal)
v6: move obj back to intel_guc, move functions to intel_uc.c, don't
clear obj on new GuC load, free object only if enable_guc_loading
is set (Michal)
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Oscar Mateo <oscar.mateo@intel.com>
Cc: Michal Wajdeczko <michal.wajdeczko@intel.com>
Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1495475428-19295-1-git-send-email-daniele.ceraolospurio@intel.com
Reviewed-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Tested-by: Michel Thierry <michel.thierry@intel.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
diff --git a/drivers/gpu/drm/i915/intel_uc.c b/drivers/gpu/drm/i915/intel_uc.c
index d17029c..7a7b07d 100644
--- a/drivers/gpu/drm/i915/intel_uc.c
+++ b/drivers/gpu/drm/i915/intel_uc.c
@@ -288,6 +288,23 @@ static void guc_init_send_regs(struct intel_guc *guc)
guc->send_regs.fw_domains = fw_domains;
}
+static void guc_capture_load_err_log(struct intel_guc *guc)
+{
+ if (!guc->log.vma || i915.guc_log_level < 0)
+ return;
+
+ if (!guc->load_err_log)
+ guc->load_err_log = i915_gem_object_get(guc->log.vma->obj);
+
+ return;
+}
+
+static void guc_free_load_err_log(struct intel_guc *guc)
+{
+ if (guc->load_err_log)
+ i915_gem_object_put(guc->load_err_log);
+}
+
static int guc_enable_communication(struct intel_guc *guc)
{
struct drm_i915_private *dev_priv = guc_to_i915(guc);
@@ -367,11 +384,11 @@ int intel_uc_init_hw(struct drm_i915_private *dev_priv)
/* Did we succeded or run out of retries? */
if (ret)
- goto err_submission;
+ goto err_log_capture;
ret = guc_enable_communication(guc);
if (ret)
- goto err_submission;
+ goto err_log_capture;
intel_guc_auth_huc(dev_priv);
if (i915.enable_guc_submission) {
@@ -397,6 +414,8 @@ int intel_uc_init_hw(struct drm_i915_private *dev_priv)
err_interrupts:
guc_disable_communication(guc);
gen9_disable_guc_interrupts(dev_priv);
+err_log_capture:
+ guc_capture_load_err_log(guc);
err_submission:
if (i915.enable_guc_submission)
i915_guc_submission_fini(dev_priv);
@@ -422,6 +441,8 @@ void intel_uc_fini_hw(struct drm_i915_private *dev_priv)
if (!i915.enable_guc_loading)
return;
+ guc_free_load_err_log(&dev_priv->guc);
+
if (i915.enable_guc_submission)
i915_guc_submission_disable(dev_priv);