radeon: Optimize memory handling for dma operations.

We keep dma buffer objects in list untill they have been unused for many
draw operations. Current limit of having 100 flushes is just guess for
good performance/memory trade off.

Moving WARN_ONCE macro to common context because it is used in multiple drivers.

Signed-off-by: Pauli Nieminen <suokkos@gmail.com>

1 files changed, 103 insertions, 39 deletions

diff --git a/src/mesa/drivers/dri/radeon/radeon_dma.c b/src/mesa/drivers/dri/radeon/radeon_dma.c
index 5e755c51ed..93bcae2454 100644
--- a/src/mesa/drivers/dri/radeon/radeon_dma.c
+++ b/src/mesa/drivers/dri/radeon/radeon_dma.c
@@ -31,6 +31,7 @@ USE OR OTHER DEALINGS IN THE SOFTWARE.
 **************************************************************************/
 
 #include "radeon_common.h"
+#include "main/simple_list.h"
 
 #if defined(USE_X86_ASM)
 #define COPY_DWORDS( dst, src, nr )					\
@@ -161,9 +162,15 @@ void rcommon_emit_vector(GLcontext * ctx, struct radeon_aos *aos,
 	}
 }
 
-void radeonRefillCurrentDmaRegion(radeonContextPtr rmesa, int size)
+void radeon_init_dma(radeonContextPtr rmesa)
 {
+   make_empty_list(&rmesa->dma.free);
+   make_empty_list(&rmesa->dma.wait);
+   make_empty_list(&rmesa->dma.reserved);
+}
 
+void radeonRefillCurrentDmaRegion(radeonContextPtr rmesa, int size)
+{
 	size = MAX2(size, MAX_DMA_BUF_SZ);
 
 	if (RADEON_DEBUG & (DEBUG_IOCTL | DEBUG_DMA))
@@ -173,43 +180,41 @@ void radeonRefillCurrentDmaRegion(radeonContextPtr rmesa, int size)
 		rmesa->dma.flush(rmesa->glCtx);
 	}
 
-	if (rmesa->dma.nr_released_bufs > 4) {
-		rcommonFlushCmdBuf(rmesa, __FUNCTION__);
-		rmesa->dma.nr_released_bufs = 0;
-	}
-
-	if (rmesa->dma.current) {
-		radeon_bo_unmap(rmesa->dma.current);
-		radeon_bo_unref(rmesa->dma.current);
-		rmesa->dma.current = 0;
-	}
+	if (is_empty_list(&rmesa->dma.free)) {
+		struct radeon_dma_bo *dma_bo = CALLOC(sizeof(struct radeon_dma_bo));
+		assert(dma_bo);
 
 again_alloc:
-	rmesa->dma.current = radeon_bo_open(rmesa->radeonScreen->bom,
+		dma_bo->bo = radeon_bo_open(rmesa->radeonScreen->bom,
 					    0, size, 4, RADEON_GEM_DOMAIN_GTT,
 					    0);
 
-	if (!rmesa->dma.current) {
-		rcommonFlushCmdBuf(rmesa, __FUNCTION__);
-		rmesa->dma.nr_released_bufs = 0;
-		goto again_alloc;
+		if (!dma_bo->bo) {
+			rcommonFlushCmdBuf(rmesa, __FUNCTION__);
+			goto again_alloc;
+		}
+		insert_at_head(&rmesa->dma.reserved, dma_bo);
+	} else {
+		struct radeon_dma_bo *dma_bo = last_elem(&rmesa->dma.free);
+		assert(dma_bo->bo->cref == 1);
+		remove_from_list(dma_bo);
+		insert_at_head(&rmesa->dma.reserved, dma_bo);
 	}
 
 	rmesa->dma.current_used = 0;
 	rmesa->dma.current_vertexptr = 0;
 	
 	if (radeon_cs_space_check_with_bo(rmesa->cmdbuf.cs,
-					  rmesa->dma.current,
+					  first_elem(&rmesa->dma.reserved)->bo,
 					  RADEON_GEM_DOMAIN_GTT, 0))
 		fprintf(stderr,"failure to revalidate BOs - badness\n");
 
-	if (!rmesa->dma.current) {
+	if (is_empty_list(&rmesa->dma.reserved)) {
         /* Cmd buff have been flushed in radeon_revalidate_bos */
-		rmesa->dma.nr_released_bufs = 0;
 		goto again_alloc;
 	}
 
-	radeon_bo_map(rmesa->dma.current, 1);
+	radeon_bo_map(first_elem(&rmesa->dma.reserved)->bo, 1);
 }
 
 /* Allocates a region from rmesa->dma.current.  If there isn't enough
@@ -230,30 +235,87 @@ void radeonAllocDmaRegion(radeonContextPtr rmesa,
 	alignment--;
 	rmesa->dma.current_used = (rmesa->dma.current_used + alignment) & ~alignment;
 
-	if (!rmesa->dma.current || rmesa->dma.current_used + bytes > rmesa->dma.current->size)
+	if (is_empty_list(&rmesa->dma.reserved)
+		|| rmesa->dma.current_used + bytes > first_elem(&rmesa->dma.reserved)->bo->size)
 		radeonRefillCurrentDmaRegion(rmesa, (bytes + 15) & ~15);
 
 	*poffset = rmesa->dma.current_used;
-	*pbo = rmesa->dma.current;
+	*pbo = first_elem(&rmesa->dma.reserved)->bo;
 	radeon_bo_ref(*pbo);
 
 	/* Always align to at least 16 bytes */
 	rmesa->dma.current_used = (rmesa->dma.current_used + bytes + 15) & ~15;
 	rmesa->dma.current_vertexptr = rmesa->dma.current_used;
 
-	assert(rmesa->dma.current_used <= rmesa->dma.current->size);
+	assert(rmesa->dma.current_used <= first_elem(&rmesa->dma.reserved)->bo->size);
+}
+
+void radeonFreeDmaRegions(radeonContextPtr rmesa)
+{
+	struct radeon_dma_bo *dma_bo;
+	struct radeon_dma_bo *temp;
+	if (RADEON_DEBUG & DEBUG_IOCTL)
+		fprintf(stderr, "%s\n", __FUNCTION__);
+
+	foreach_s(dma_bo, temp, &rmesa->dma.free) {
+		remove_from_list(dma_bo);
+	        radeon_bo_unref(dma_bo->bo);
+		FREE(dma_bo);
+	}
+
+	foreach_s(dma_bo, temp, &rmesa->dma.reserved) {
+		remove_from_list(dma_bo);
+		radeon_bo_unmap(dma_bo->bo);
+	        radeon_bo_unref(dma_bo->bo);
+		FREE(dma_bo);
+	}
 }
 
-void radeonReleaseDmaRegion(radeonContextPtr rmesa)
+void radeonReleaseDmaRegions(radeonContextPtr rmesa)
 {
+	struct radeon_dma_bo *dma_bo;
+	struct radeon_dma_bo *temp;
+	const int expire_at = ++rmesa->dma.free.expire_counter + DMA_BO_FREE_TIME;
+	const int time = rmesa->dma.free.expire_counter;
 	if (RADEON_DEBUG & DEBUG_IOCTL)
-		fprintf(stderr, "%s %p\n", __FUNCTION__, rmesa->dma.current);
-	if (rmesa->dma.current) {
-		rmesa->dma.nr_released_bufs++;
-		radeon_bo_unmap(rmesa->dma.current);
-	        radeon_bo_unref(rmesa->dma.current);
+		fprintf(stderr, "%s\n", __FUNCTION__);
+
+	/* move waiting bos to free list.
+	   wait list provides gpu time to handle data before reuse */
+	foreach_s(dma_bo, temp, &rmesa->dma.wait) {
+		if (dma_bo->expire_counter == time) {
+			WARN_ONCE("Leaking dma buffer object!\n");
+			radeon_bo_unref(dma_bo->bo);
+			remove_from_list(dma_bo);
+			FREE(dma_bo);
+			continue;
+		}
+		if (dma_bo->bo->cref > 1)
+			continue;
+		remove_from_list(dma_bo);
+		dma_bo->expire_counter = expire_at;
+		insert_at_tail(&rmesa->dma.free, dma_bo);
+	}
+
+	/* unmap the last dma region */
+	if (!is_empty_list(&rmesa->dma.reserved))
+		radeon_bo_unmap(first_elem(&rmesa->dma.reserved)->bo);
+	/* move reserved to wait list */
+	foreach_s(dma_bo, temp, &rmesa->dma.reserved) {
+		remove_from_list(dma_bo);
+		dma_bo->expire_counter = expire_at;
+		insert_at_tail(&rmesa->dma.wait, dma_bo);
+	}
+
+	/* free bos that have been unused for some time */
+	foreach_s(dma_bo, temp, &rmesa->dma.free) {
+		if (dma_bo->expire_counter != time)
+			break;
+		remove_from_list(dma_bo);
+	        radeon_bo_unref(dma_bo->bo);
+		FREE(dma_bo);
 	}
-	rmesa->dma.current = NULL;
+
 }
 
 
@@ -266,10 +328,10 @@ void rcommon_flush_last_swtcl_prim( GLcontext *ctx  )
 		
 
 	if (RADEON_DEBUG & DEBUG_IOCTL)
-		fprintf(stderr, "%s %p\n", __FUNCTION__, dma->current);
+		fprintf(stderr, "%s\n", __FUNCTION__);
 	dma->flush = NULL;
 
-	if (dma->current) {
+	if (!is_empty_list(&dma->reserved)) {
 	    GLuint current_offset = dma->current_used;
 
 	    assert (dma->current_used +
@@ -292,7 +354,10 @@ rcommonAllocDmaLowVerts( radeonContextPtr rmesa, int nverts, int vsize )
 	GLuint bytes = vsize * nverts;
 	void *head;
 restart:
-	if (!rmesa->dma.current || rmesa->dma.current_vertexptr + bytes > rmesa->dma.current->size) {
+	if (RADEON_DEBUG & DEBUG_IOCTL)
+		fprintf(stderr, "%s\n", __FUNCTION__);
+	if (is_empty_list(&rmesa->dma.reserved)
+		|| rmesa->dma.current_vertexptr + bytes > first_elem(&rmesa->dma.reserved)->bo->size) {
                 radeonRefillCurrentDmaRegion(rmesa, bytes);
 	}
 
@@ -302,7 +367,7 @@ restart:
 			      rmesa->hw.max_state_size + (20*sizeof(int)),
 			      __FUNCTION__);
 		/* if cmdbuf flushed DMA restart */
-		if (!rmesa->dma.current)
+		if (is_empty_list(&rmesa->dma.reserved))
 			goto restart;
                 rmesa->glCtx->Driver.NeedFlush |= FLUSH_STORED_VERTICES;
                 rmesa->dma.flush = rcommon_flush_last_swtcl_prim;
@@ -314,7 +379,7 @@ restart:
                 rmesa->swtcl.numverts * rmesa->swtcl.vertex_size * 4 ==
                 rmesa->dma.current_vertexptr );
 
-	head = (rmesa->dma.current->ptr + rmesa->dma.current_vertexptr);
+	head = (first_elem(&rmesa->dma.reserved)->bo->ptr + rmesa->dma.current_vertexptr);
 	rmesa->dma.current_vertexptr += bytes;
 	rmesa->swtcl.numverts += nverts;
 	return head;
@@ -324,18 +389,17 @@ void radeonReleaseArrays( GLcontext *ctx, GLuint newinputs )
 {
    radeonContextPtr radeon = RADEON_CONTEXT( ctx );
    int i;
+	if (RADEON_DEBUG & DEBUG_IOCTL)
+		fprintf(stderr, "%s\n", __FUNCTION__);
 
    if (radeon->dma.flush) {
        radeon->dma.flush(radeon->glCtx);
    }
-   if (radeon->tcl.elt_dma_bo) {
-	   radeon_bo_unref(radeon->tcl.elt_dma_bo);
-	   radeon->tcl.elt_dma_bo = NULL;
-   }
    for (i = 0; i < radeon->tcl.aos_count; i++) {
       if (radeon->tcl.aos[i].bo) {
          radeon_bo_unref(radeon->tcl.aos[i].bo);
          radeon->tcl.aos[i].bo = NULL;
+
       }
    }
 }