panfrost: Add perf_debug macros

Lifted from freedreno.

Signed-off-by: Alyssa Rosenzweig <alyssa@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/11830>

src/gallium/drivers/panfrost/pan_screen.c

@@ -57,6 +57,7 @@
 #include "panfrost-quirks.h"
 
 static const struct debug_named_value panfrost_debug_options[] = {
+        {"perf",      PAN_DBG_PERF,     "Enable performance warnings"},
         {"trace",     PAN_DBG_TRACE,    "Trace the command stream"},
         {"deqp",      PAN_DBG_DEQP,     "Hacks for dEQP"},
         {"dirty",     PAN_DBG_DIRTY,    "Always re-emit all state"},

src/gallium/drivers/panfrost/pan_screen.h

@@ -36,6 +36,7 @@
 #include "util/u_dynarray.h"
 #include "util/bitset.h"
 #include "util/set.h"
+#include "util/log.h"
 
 #include "pan_device.h"
 #include "pan_mempool.h"
@@ -103,4 +104,13 @@ panfrost_fence_create(struct panfrost_context *ctx);
 void
 panfrost_cmdstream_screen_init(struct panfrost_screen *screen);
 
+#define perf_debug(dev, ...) \
+        do { \
+                if (unlikely((dev)->debug & PAN_DBG_PERF)) \
+                        mesa_logw(__VA_ARGS__); \
+        } while(0)
+
+#define perf_debug_ctx(ctx, ...) \
+        perf_debug(pan_device((ctx)->base.screen), __VA_ARGS__);
+
 #endif /* PAN_SCREEN_H */

src/panfrost/lib/pan_util.h

@@ -28,7 +28,7 @@
 #ifndef PAN_UTIL_H
 #define PAN_UTIL_H
 
-/* 0x0001 unused */
+#define PAN_DBG_PERF            0x0001
 #define PAN_DBG_TRACE           0x0002
 #define PAN_DBG_DEQP            0x0004
 #define PAN_DBG_DIRTY           0x0008