etnaviv: Command buffer realloc

[mesa.git] / src / etnaviv / drm / etnaviv_cmd_stream.c

diff --git a/src/etnaviv/drm/etnaviv_cmd_stream.c b/src/etnaviv/drm/etnaviv_cmd_stream.c
index 6a218ad0bf23ee2d2c4bcbfd5ccd750f7a7f96d3..ef5143003aebd6c5e62b079464656d2a5e94b83b 100644 (file)
--- a/src/etnaviv/drm/etnaviv_cmd_stream.c
+++ b/src/etnaviv/drm/etnaviv_cmd_stream.c
@@ -25,6 +25,7 @@
  */
 
 #include <assert.h>
  */
 
 #include <assert.h>

+#include <stdlib.h>

 
 #include "etnaviv_drmif.h"
 #include "etnaviv_priv.h"
 
 #include "etnaviv_drmif.h"
 #include "etnaviv_priv.h"


@@ -49,6 +50,35 @@ static void *grow(void *ptr, uint32_t nr, uint32_t *max, uint32_t sz)
        (x)->nr_ ## name ++; \
 })
 
        (x)->nr_ ## name ++; \
 })
 

+void etna_cmd_stream_realloc(struct etna_cmd_stream *stream, size_t n)
+{
+       size_t size;
+       void *buffer;
+
+       /*
+        * Increase the command buffer size by 1 kiB. Here we pick 1 kiB
+        * increment to prevent it from growing too much too quickly.
+        */
+       size = ALIGN(stream->size + n, 1024);
+
+       /* Command buffer is too big for older kernel versions */
+       if (size >= 32768)
+               goto error;
+
+       buffer = realloc(stream->buffer, size * 4);
+       if (!buffer)
+               goto error;
+
+       stream->buffer = buffer;
+       stream->size = size;
+
+       return;
+
+error:
+       WARN_MSG("command buffer too long, forcing flush.");
+       etna_cmd_stream_force_flush(stream);
+}
+

 static inline struct etna_cmd_stream_priv *
 etna_cmd_stream_priv(struct etna_cmd_stream *stream)
 {
 static inline struct etna_cmd_stream_priv *
 etna_cmd_stream_priv(struct etna_cmd_stream *stream)
 {