gallium/radeon: transfers and invalidation for sparse buffers

Sparse buffers can never be mapped by the CPU.

Reviewed-by: Marek Olšák <marek.olsak@amd.com>

diff --git a/src/gallium/drivers/radeon/r600_buffer_common.c b/src/gallium/drivers/radeon/r600_buffer_common.c
index a1e8228..10036af 100644 (file)
--- a/src/gallium/drivers/radeon/r600_buffer_common.c
+++ b/src/gallium/drivers/radeon/r600_buffer_common.c
@@ -51,6 +51,8 @@ void *r600_buffer_map_sync_with_rings(struct r600_common_context *ctx,
        enum radeon_bo_usage rusage = RADEON_USAGE_READWRITE;
        bool busy = false;
 
+       assert(!(resource->flags & RADEON_FLAG_SPARSE));
+
        if (usage & PIPE_TRANSFER_UNSYNCHRONIZED) {
                return ctx->ws->buffer_map(resource->buf, NULL, usage);
        }
@@ -249,6 +251,10 @@ r600_invalidate_buffer(struct r600_common_context *rctx,
        if (rbuffer->is_shared)
                return false;
 
+       /* Sparse buffers can't be reallocated. */
+       if (rbuffer->flags & RADEON_FLAG_SPARSE)
+               return false;
+
        /* In AMD_pinned_memory, the user pointer association only gets
         * broken when the buffer is explicitly re-allocated.
         */
@@ -355,14 +361,17 @@ static void *r600_buffer_transfer_map(struct pipe_context *ctx,
        }
 
        if ((usage & PIPE_TRANSFER_DISCARD_RANGE) &&
-           !(usage & (PIPE_TRANSFER_UNSYNCHRONIZED |
-                      PIPE_TRANSFER_PERSISTENT)) &&
            !(rscreen->debug_flags & DBG_NO_DISCARD_RANGE) &&
-           r600_can_dma_copy_buffer(rctx, box->x, 0, box->width)) {
+           ((!(usage & (PIPE_TRANSFER_UNSYNCHRONIZED |
+                        PIPE_TRANSFER_PERSISTENT)) &&
+             r600_can_dma_copy_buffer(rctx, box->x, 0, box->width)) ||
+            (rbuffer->flags & RADEON_FLAG_SPARSE))) {
                assert(usage & PIPE_TRANSFER_WRITE);
 
-               /* Check if mapping this buffer would cause waiting for the GPU. */
-               if (r600_rings_is_buffer_referenced(rctx, rbuffer->buf, RADEON_USAGE_READWRITE) ||
+               /* Check if mapping this buffer would cause waiting for the GPU.
+                */
+               if (rbuffer->flags & RADEON_FLAG_SPARSE ||
+                   r600_rings_is_buffer_referenced(rctx, rbuffer->buf, RADEON_USAGE_READWRITE) ||
                    !rctx->ws->buffer_wait(rbuffer->buf, 0, RADEON_USAGE_READWRITE)) {
                        /* Do a wait-free write-only transfer using a temporary buffer. */
                        unsigned offset;
@@ -378,6 +387,8 @@ static void *r600_buffer_transfer_map(struct pipe_context *ctx,
                                data += box->x % R600_MAP_BUFFER_ALIGNMENT;
                                return r600_buffer_get_transfer(ctx, resource, usage, box,
                                                                ptransfer, data, staging, offset);
+                       } else if (rbuffer->flags & RADEON_FLAG_SPARSE) {
+                               return NULL;
                        }
                } else {
                        /* At this point, the buffer is always idle (we checked it above). */
@@ -385,11 +396,12 @@ static void *r600_buffer_transfer_map(struct pipe_context *ctx,
                }
        }
        /* Use a staging buffer in cached GTT for reads. */
-       else if ((usage & PIPE_TRANSFER_READ) &&
-                !(usage & PIPE_TRANSFER_PERSISTENT) &&
-                (rbuffer->domains & RADEON_DOMAIN_VRAM ||
-                 rbuffer->flags & RADEON_FLAG_GTT_WC) &&
-                r600_can_dma_copy_buffer(rctx, 0, box->x, box->width)) {
+       else if (((usage & PIPE_TRANSFER_READ) &&
+                 !(usage & PIPE_TRANSFER_PERSISTENT) &&
+                 (rbuffer->domains & RADEON_DOMAIN_VRAM ||
+                  rbuffer->flags & RADEON_FLAG_GTT_WC) &&
+                 r600_can_dma_copy_buffer(rctx, 0, box->x, box->width)) ||
+                (rbuffer->flags & RADEON_FLAG_SPARSE)) {
                struct r600_resource *staging;
 
                staging = (struct r600_resource*) pipe_buffer_create(
@@ -411,6 +423,8 @@ static void *r600_buffer_transfer_map(struct pipe_context *ctx,
 
                        return r600_buffer_get_transfer(ctx, resource, usage, box,
                                                        ptransfer, data, staging, 0);
+               } else if (rbuffer->flags & RADEON_FLAG_SPARSE) {
+                       return NULL;
                }
        }