Mesa (master): svga: add max DMA size check in svga_winsys_buffer_create()
Brian Paul
brianp at kemper.freedesktop.org
Fri Feb 11 18:58:24 UTC 2011
Module: Mesa
Branch: master
Commit: da2e541218d65c8931f0061fc4badd8fdedfcb83
URL: http://cgit.freedesktop.org/mesa/mesa/commit/?id=da2e541218d65c8931f0061fc4badd8fdedfcb83
Author: Brian Paul <brianp at vmware.com>
Date: Fri Feb 11 11:56:44 2011 -0700
svga: add max DMA size check in svga_winsys_buffer_create()
This fixes a problem when trying to use large (2K x 2K) texture
images. We'll DMA the image in chunks.
Patch written by Jose.
---
.../drivers/svga/svga_resource_buffer_upload.c | 10 ++++++++++
1 files changed, 10 insertions(+), 0 deletions(-)
diff --git a/src/gallium/drivers/svga/svga_resource_buffer_upload.c b/src/gallium/drivers/svga/svga_resource_buffer_upload.c
index 765d2f3..fdc0329 100644
--- a/src/gallium/drivers/svga/svga_resource_buffer_upload.c
+++ b/src/gallium/drivers/svga/svga_resource_buffer_upload.c
@@ -40,6 +40,9 @@
#include "svga_debug.h"
+#define MAX_DMA_SIZE (8 * 1024 * 1024)
+
+
/**
* Allocate a winsys_buffer (ie. DMA, aka GMR memory).
*
@@ -57,6 +60,13 @@ svga_winsys_buffer_create( struct svga_context *svga,
struct svga_winsys_screen *sws = svgascreen->sws;
struct svga_winsys_buffer *buf;
+ /* XXX this shouldn't be a hard-coded number; it should be queried
+ * somehow.
+ */
+ if (size > MAX_DMA_SIZE) {
+ return NULL;
+ }
+
/* Just try */
buf = sws->buffer_create(sws, alignment, usage, size);
if(!buf) {
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