@@ -2544,25 +2544,31 @@ static int i915_guc_log_dump(struct seq_file *m, void *data)
{
struct drm_i915_private *dev_priv = node_to_i915(m->private);
struct drm_i915_gem_object *obj;
- int i = 0, pg;
+ u32 *log;
+ int i = 0;
- if (!dev_priv->guc.log.vma)
+ if (dev_priv->guc.log.vma)
+ obj = dev_priv->guc.log.vma->obj;
+ else if (dev_priv->guc.err_load_log)
+ obj = dev_priv->guc.err_load_log;
+ else
return 0;
- obj = dev_priv->guc.log.vma->obj;
- for (pg = 0; pg < obj->base.size / PAGE_SIZE; pg++) {
- u32 *log = kmap_atomic(i915_gem_object_get_page(obj, pg));
-
- for (i = 0; i < PAGE_SIZE / sizeof(u32); i += 4)
- seq_printf(m, "0x%08x 0x%08x 0x%08x 0x%08x\n",
- *(log + i), *(log + i + 1),
- *(log + i + 2), *(log + i + 3));
-
- kunmap_atomic(log);
+ log = i915_gem_object_pin_map(obj, I915_MAP_WC);
+ if (IS_ERR(log)) {
+ DRM_ERROR("Failed to pin guc_log object\n");
+ return PTR_ERR(log);
}
+ for (i = 0; i < obj->base.size / sizeof(u32); i += 4)
+ seq_printf(m, "0x%08x 0x%08x 0x%08x 0x%08x\n",
+ *(log + i), *(log + i + 1),
+ *(log + i + 2), *(log + i + 3));
+
seq_putc(m, '\n');
+ i915_gem_object_unpin_map(obj);
+
return 0;
}
@@ -1354,6 +1354,9 @@ void i915_driver_unload(struct drm_device *dev)
cancel_delayed_work_sync(&dev_priv->gpu_error.hangcheck_work);
i915_reset_error_state(dev_priv);
+ /* release GuC error log (if any) */
+ i915_guc_load_error_log_free(&dev_priv->guc);
+
/* Flush any outstanding unpin_work. */
drain_workqueue(dev_priv->wq);
@@ -660,3 +660,20 @@ void i915_guc_log_unregister(struct drm_i915_private *dev_priv)
guc_log_runtime_destroy(&dev_priv->guc);
mutex_unlock(&dev_priv->drm.struct_mutex);
}
+
+void i915_guc_load_error_log_capture(struct intel_guc *guc)
+{
+ if (!guc->log.vma || i915.guc_log_level < 0)
+ return;
+
+ if (!guc->err_load_log)
+ guc->err_load_log = i915_gem_object_get(guc->log.vma->obj);
+
+ return;
+}
+
+void i915_guc_load_error_log_free(struct intel_guc *guc)
+{
+ if (guc->err_load_log)
+ i915_gem_object_put(guc->err_load_log);
+}
@@ -274,6 +274,7 @@ int intel_uc_init_hw(struct drm_i915_private *dev_priv)
guc_disable_communication(guc);
gen9_reset_guc_interrupts(dev_priv);
+ i915_guc_load_error_log_free(guc);
/* We need to notify the guc whenever we change the GGTT */
i915_ggtt_enable_guc(dev_priv);
@@ -320,11 +321,11 @@ 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) {
@@ -350,6 +351,8 @@ 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:
+ i915_guc_load_error_log_capture(guc);
err_submission:
if (i915.enable_guc_submission)
i915_guc_submission_fini(dev_priv);
@@ -210,6 +210,9 @@ struct intel_guc {
/* GuC's FW specific send function */
int (*send)(struct intel_guc *guc, const u32 *data, u32 len);
+
+ /* Log snapshot if GuC errors during load */
+ struct drm_i915_gem_object *err_load_log;
};
struct intel_huc {
@@ -256,6 +259,8 @@ static inline int intel_guc_send(struct intel_guc *guc, const u32 *action, u32 l
int i915_guc_log_control(struct drm_i915_private *dev_priv, u64 control_val);
void i915_guc_log_register(struct drm_i915_private *dev_priv);
void i915_guc_log_unregister(struct drm_i915_private *dev_priv);
+void i915_guc_load_error_log_capture(struct intel_guc *guc);
+void i915_guc_load_error_log_free(struct intel_guc *guc);
static inline u32 guc_ggtt_offset(struct i915_vma *vma)
{
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 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> --- drivers/gpu/drm/i915/i915_debugfs.c | 30 ++++++++++++++++++------------ drivers/gpu/drm/i915/i915_drv.c | 3 +++ drivers/gpu/drm/i915/intel_guc_log.c | 17 +++++++++++++++++ drivers/gpu/drm/i915/intel_uc.c | 7 +++++-- drivers/gpu/drm/i915/intel_uc.h | 5 +++++ 5 files changed, 48 insertions(+), 14 deletions(-)