This function will be used when we want to map an item
that it's already in the pool.
---
src/gallium/drivers/r600/compute_memory_pool.c | 45 ++++++++++++++++++++++++++
src/gallium/drivers/r600/compute_memory_pool.h | 3 ++
2 files changed, 48 insertions(+)
diff --git a/src/gallium/drivers/r600/compute_memory_pool.c
b/src/gallium/drivers/r600/compute_memory_pool.c
index e1f9c88..624b50d 100644
--- a/src/gallium/drivers/r600/compute_memory_pool.c
+++ b/src/gallium/drivers/r600/compute_memory_pool.c
@@ -383,6 +383,51 @@ int compute_memory_promote_item(struct compute_memory_pool
*pool,
return 0;
}
+void compute_memory_demote_item(struct compute_memory_pool *pool,
+ struct compute_memory_item *item, struct pipe_context *pipe)
+{
+ /* First, we remove the item from the item_list */
+ if (item->prev == NULL)
+ pool->item_list = item->next;
+ else
+ item->prev->next = item->next;
+
+ if (item->next != NULL)
+ item->next->prev = item->prev;
+
+
+ /* Now we add it to the beginning of the unallocated list
+ * NOTE: we could also add it to the end, but this is easier */
+ item->next = NULL;
+ item->prev = NULL;
+ if (pool->unallocated_list) {
+ item->next = pool->unallocated_list;
+ item->next->prev = item;
+ pool->unallocated_list = item;
+ }
+ else
+ pool->unallocated_list = item;
+
+ /* We check if the intermediate buffer exists, and if it
+ * doesn't, we create it again */
+ if (item->real_buffer == NULL) {
+ item->real_buffer = (struct
r600_resource*)r600_compute_buffer_alloc_vram(
+ pool->screen, item->size_in_dw * 4);
+ }
+
+ /* We transfer the memory from the item in the pool to the
+ * temporary buffer */
+ ((struct r600_context *)pipe)->b.b.resource_copy_region(pipe,
+ (struct pipe_resource *)item->real_buffer,
+ 0, 0, 0, 0,
+ (struct pipe_resource *)pool->bo,
+ 0, &(struct pipe_box) { .x = item->start_in_dw * 4,
+ .width = item->size_in_dw * 4, .height = 1, .depth = 1});
+
+ /* Remember to mark the buffer as 'pending' by setting start_in_dw to
-1 */
+ item->start_in_dw = -1;
+}
+
void compute_memory_free(struct compute_memory_pool* pool, int64_t id)
{
struct compute_memory_item *item, *next;
diff --git a/src/gallium/drivers/r600/compute_memory_pool.h
b/src/gallium/drivers/r600/compute_memory_pool.h
index 6a45fb2..1eb60da 100644
--- a/src/gallium/drivers/r600/compute_memory_pool.h
+++ b/src/gallium/drivers/r600/compute_memory_pool.h
@@ -85,6 +85,9 @@ int compute_memory_promote_item(struct compute_memory_pool
*pool,
struct compute_memory_item *item, struct pipe_context *pipe,
int64_t allocated);
+void compute_memory_demote_item(struct compute_memory_pool *pool,
+ struct compute_memory_item *item, struct pipe_context *pipe);
+
void compute_memory_free(struct compute_memory_pool* pool, int64_t id);
struct compute_memory_item* compute_memory_alloc(struct compute_memory_pool*
pool, int64_t size_in_dw); ///Creates pending allocations
--
2.0.0
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