r200: make use of DMA buffers for Elts a lot better.

This allows us to return the unused portion of the dma buffer
to the allocator instead of wasting nearly 16k a pop.

Cherry picked and ported to new code by Pauli.

2 files changed, 13 insertions, 0 deletions

diff --git a/src/mesa/drivers/dri/radeon/radeon_dma.c b/src/mesa/drivers/dri/radeon/radeon_dma.c
index 93bcae2454b..b2376ea28b5 100644
--- a/src/mesa/drivers/dri/radeon/radeon_dma.c
+++ b/src/mesa/drivers/dri/radeon/radeon_dma.c
@@ -271,6 +271,17 @@ void radeonFreeDmaRegions(radeonContextPtr rmesa)
 	}
 }
 
+void radeonReturnDmaRegion(radeonContextPtr rmesa, int return_bytes)
+{
+	if (is_empty_list(&rmesa->dma.reserved))
+		return;
+
+	if (RADEON_DEBUG & DEBUG_IOCTL)
+		fprintf(stderr, "%s %d\n", __FUNCTION__, return_bytes);
+	rmesa->dma.current_used -= return_bytes;
+	rmesa->dma.current_vertexptr = rmesa->dma.current_used;
+}
+
 void radeonReleaseDmaRegions(radeonContextPtr rmesa)
 {
 	struct radeon_dma_bo *dma_bo;
diff --git a/src/mesa/drivers/dri/radeon/radeon_dma.h b/src/mesa/drivers/dri/radeon/radeon_dma.h
index 21f956e3211..74e653fd189 100644
--- a/src/mesa/drivers/dri/radeon/radeon_dma.h
+++ b/src/mesa/drivers/dri/radeon/radeon_dma.h
@@ -41,8 +41,10 @@ void radeonEmitVec16(uint32_t *out, const GLvoid * data, int stride, int count);
 void rcommon_emit_vector(GLcontext * ctx, struct radeon_aos *aos,
 			 const GLvoid * data, int size, int stride, int count);
 
+void radeonReturnDmaRegion(radeonContextPtr rmesa, int return_bytes);
 void radeonRefillCurrentDmaRegion(radeonContextPtr rmesa, int size);
 void radeon_init_dma(radeonContextPtr rmesa);
+void radeonReturnDmaRegion(radeonContextPtr rmesa, int return_bytes);
 void radeonAllocDmaRegion(radeonContextPtr rmesa,
 			  struct radeon_bo **pbo, int *poffset,
 			  int bytes, int alignment);