drm/i915: Add engine name to workaround debug print

There is a debug message in the workaround initialisation path that
reports how many entries were added of each type. However, whitelist
workarounds exist for multiple engines but the type name is just
'whitelist'. Tvrtko suggested adding the engine name to make the
message more useful.

v2: Updated the similar message in the workaround reset selftest.

Signed-off-by: John Harrison <John.C.Harrison@Intel.com>
CC: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190712070745.35239-4-John.C.Harrison@Intel.com

3 files changed, 14 insertions, 19 deletions

diff --git a/drivers/gpu/drm/i915/gt/intel_workarounds.c b/drivers/gpu/drm/i915/gt/intel_workarounds.c
index 95be0f108f26..3b1fc7c8faa8 100644
--- a/drivers/gpu/drm/i915/gt/intel_workarounds.c
+++ b/drivers/gpu/drm/i915/gt/intel_workarounds.c
@@ -50,9 +50,10 @@
  * - Public functions to init or apply the given workaround type.
  */
 
-static void wa_init_start(struct i915_wa_list *wal, const char *name)
+static void wa_init_start(struct i915_wa_list *wal, const char *name, const char *engine_name)
 {
 	wal->name = name;
+	wal->engine_name = engine_name;
 }
 
 #define WA_LIST_CHUNK (1 << 4)
@@ -74,8 +75,8 @@ static void wa_init_finish(struct i915_wa_list *wal)
 	if (!wal->count)
 		return;
 
-	DRM_DEBUG_DRIVER("Initialized %u %s workarounds\n",
-			 wal->wa_count, wal->name);
+	DRM_DEBUG_DRIVER("Initialized %u %s workarounds on %s\n",
+			 wal->wa_count, wal->name, wal->engine_name);
 }
 
 static void _wa_add(struct i915_wa_list *wal, const struct i915_wa *wa)
@@ -591,7 +592,7 @@ __intel_engine_init_ctx_wa(struct intel_engine_cs *engine,
 	if (engine->class != RENDER_CLASS)
 		return;
 
-	wa_init_start(wal, name);
+	wa_init_start(wal, name, engine->name);
 
 	if (IS_GEN(i915, 11))
 		icl_ctx_workarounds_init(engine, wal);
@@ -921,7 +922,7 @@ void intel_gt_init_workarounds(struct drm_i915_private *i915)
 {
 	struct i915_wa_list *wal = &i915->gt_wa_list;
 
-	wa_init_start(wal, "GT");
+	wa_init_start(wal, "GT", "global");
 	gt_init_workarounds(i915, wal);
 	wa_init_finish(wal);
 }
@@ -1192,7 +1193,7 @@ void intel_engine_init_whitelist(struct intel_engine_cs *engine)
 	struct drm_i915_private *i915 = engine->i915;
 	struct i915_wa_list *w = &engine->whitelist;
 
-	wa_init_start(w, "whitelist");
+	wa_init_start(w, "whitelist", engine->name);
 
 	if (IS_GEN(i915, 11))
 		icl_whitelist_build(engine);
@@ -1384,7 +1385,7 @@ void intel_engine_init_workarounds(struct intel_engine_cs *engine)
 	if (INTEL_GEN(engine->i915) < 8)
 		return;
 
-	wa_init_start(wal, engine->name);
+	wa_init_start(wal, "engine", engine->name);
 	engine_init_workarounds(engine, wal);
 	wa_init_finish(wal);
 }
diff --git a/drivers/gpu/drm/i915/gt/intel_workarounds_types.h b/drivers/gpu/drm/i915/gt/intel_workarounds_types.h
index 42ac1fb99572..e27ab1b710b3 100644
--- a/drivers/gpu/drm/i915/gt/intel_workarounds_types.h
+++ b/drivers/gpu/drm/i915/gt/intel_workarounds_types.h
@@ -20,6 +20,7 @@ struct i915_wa {
 
 struct i915_wa_list {
 	const char	*name;
+	const char	*engine_name;
 	struct i915_wa	*list;
 	unsigned int	count;
 	unsigned int	wa_count;
diff --git a/drivers/gpu/drm/i915/gt/selftest_workarounds.c b/drivers/gpu/drm/i915/gt/selftest_workarounds.c
index fd1d47ba4b10..a0d8f1bfe0ad 100644
--- a/drivers/gpu/drm/i915/gt/selftest_workarounds.c
+++ b/drivers/gpu/drm/i915/gt/selftest_workarounds.c
@@ -25,11 +25,9 @@ static const struct wo_register {
 	{ INTEL_GEMINILAKE, 0x731c }
 };
 
-#define REF_NAME_MAX (INTEL_ENGINE_CS_MAX_NAME + 8)
 struct wa_lists {
 	struct i915_wa_list gt_wa_list;
 	struct {
-		char name[REF_NAME_MAX];
 		struct i915_wa_list wa_list;
 		struct i915_wa_list ctx_wa_list;
 	} engine[I915_NUM_ENGINES];
@@ -43,25 +41,20 @@ reference_lists_init(struct drm_i915_private *i915, struct wa_lists *lists)
 
 	memset(lists, 0, sizeof(*lists));
 
-	wa_init_start(&lists->gt_wa_list, "GT_REF");
+	wa_init_start(&lists->gt_wa_list, "GT_REF", "global");
 	gt_init_workarounds(i915, &lists->gt_wa_list);
 	wa_init_finish(&lists->gt_wa_list);
 
 	for_each_engine(engine, i915, id) {
 		struct i915_wa_list *wal = &lists->engine[id].wa_list;
-		char *name = lists->engine[id].name;
 
-		snprintf(name, REF_NAME_MAX, "%s_REF", engine->name);
-
-		wa_init_start(wal, name);
+		wa_init_start(wal, "REF", engine->name);
 		engine_init_workarounds(engine, wal);
 		wa_init_finish(wal);
 
-		snprintf(name, REF_NAME_MAX, "%s_CTX_REF", engine->name);
-
 		__intel_engine_init_ctx_wa(engine,
 					   &lists->engine[id].ctx_wa_list,
-					   name);
+					   "CTX_REF");
 	}
 }
 
@@ -292,8 +285,8 @@ static int check_whitelist_across_reset(struct intel_engine_cs *engine,
 	intel_wakeref_t wakeref;
 	int err;
 
-	pr_info("Checking %d whitelisted registers (RING_NONPRIV) [%s]\n",
-		engine->whitelist.count, name);
+	pr_info("Checking %d whitelisted registers on %s (RING_NONPRIV) [%s]\n",
+		engine->whitelist.count, engine->name, name);
 
 	ctx = kernel_context(i915);
 	if (IS_ERR(ctx))