radeonsi: implement sync_file import/export

Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com>

diff --git a/src/gallium/drivers/radeon/r600_pipe_common.c b/src/gallium/drivers/radeon/r600_pipe_common.c
index 6d28cda..b77d859 100644 (file)
--- a/src/gallium/drivers/radeon/r600_pipe_common.c
+++ b/src/gallium/drivers/radeon/r600_pipe_common.c
@@ -39,6 +39,7 @@
 #include "amd/common/sid.h"
 #include <inttypes.h>
 #include <sys/utsname.h>
+#include <libsync.h>
 
 #include <llvm-c/TargetMachine.h>
 
@@ -351,6 +352,75 @@ static void r600_fence_server_sync(struct pipe_context *ctx,
                r600_add_fence_dependency(rctx, rfence->gfx);
 }
 
+static void r600_create_fence_fd(struct pipe_context *ctx,
+                                struct pipe_fence_handle **pfence, int fd)
+{
+       struct r600_common_screen *rscreen = (struct r600_common_screen*)ctx->screen;
+       struct radeon_winsys *ws = rscreen->ws;
+       struct r600_multi_fence *rfence;
+
+       *pfence = NULL;
+
+       if (!rscreen->info.has_sync_file)
+               return;
+
+       rfence = CALLOC_STRUCT(r600_multi_fence);
+       if (!rfence)
+               return;
+
+       pipe_reference_init(&rfence->reference, 1);
+       rfence->gfx = ws->fence_import_sync_file(ws, fd);
+       if (!rfence->gfx) {
+               FREE(rfence);
+               return;
+       }
+
+       *pfence = (struct pipe_fence_handle*)rfence;
+}
+
+static int r600_fence_get_fd(struct pipe_screen *screen,
+                            struct pipe_fence_handle *fence)
+{
+       struct r600_common_screen *rscreen = (struct r600_common_screen*)screen;
+       struct radeon_winsys *ws = rscreen->ws;
+       struct r600_multi_fence *rfence = (struct r600_multi_fence *)fence;
+       int gfx_fd = -1, sdma_fd = -1;
+
+       if (!rscreen->info.has_sync_file)
+               return -1;
+
+       /* Deferred fences aren't supported. */
+       assert(!rfence->gfx_unflushed.ctx);
+       if (rfence->gfx_unflushed.ctx)
+               return -1;
+
+       if (rfence->sdma) {
+               sdma_fd = ws->fence_export_sync_file(ws, rfence->sdma);
+               if (sdma_fd == -1)
+                       return -1;
+       }
+       if (rfence->gfx) {
+               gfx_fd = ws->fence_export_sync_file(ws, rfence->gfx);
+               if (gfx_fd == -1) {
+                       if (sdma_fd != -1)
+                               close(sdma_fd);
+                       return -1;
+               }
+       }
+
+       /* If we don't have FDs at this point, it means we don't have fences
+        * either. */
+       if (sdma_fd == -1)
+               return gfx_fd;
+       if (gfx_fd == -1)
+               return sdma_fd;
+
+       /* Get a fence that will be a combination of both fences. */
+       sync_accumulate("radeonsi", &gfx_fd, sdma_fd);
+       close(sdma_fd);
+       return gfx_fd;
+}
+
 static void r600_flush_from_st(struct pipe_context *ctx,
                               struct pipe_fence_handle **fence,
                               unsigned flags)
@@ -379,9 +449,12 @@ static void r600_flush_from_st(struct pipe_context *ctx,
                /* Instead of flushing, create a deferred fence. Constraints:
                 * - The state tracker must allow a deferred flush.
                 * - The state tracker must request a fence.
+                * - fence_get_fd is not allowed.
                 * Thread safety in fence_finish must be ensured by the state tracker.
                 */
-               if (flags & PIPE_FLUSH_DEFERRED && fence) {
+               if (flags & PIPE_FLUSH_DEFERRED &&
+                   !(flags & PIPE_FLUSH_FENCE_FD) &&
+                   fence) {
                        gfx_fence = rctx->ws->cs_get_next_fence(rctx->gfx.cs);
                        deferred_fence = true;
                } else {
@@ -624,6 +697,7 @@ bool si_common_context_init(struct r600_common_context *rctx,
        rctx->b.memory_barrier = r600_memory_barrier;
        rctx->b.flush = r600_flush_from_st;
        rctx->b.set_debug_callback = r600_set_debug_callback;
+       rctx->b.create_fence_fd = r600_create_fence_fd;
        rctx->b.fence_server_sync = r600_fence_server_sync;
        rctx->dma_clear_buffer = r600_dma_clear_buffer_fallback;
        rctx->b.buffer_subdata = si_buffer_subdata;
@@ -1292,6 +1366,7 @@ bool si_common_screen_init(struct r600_common_screen *rscreen,
        rscreen->b.resource_destroy = u_resource_destroy_vtbl;
        rscreen->b.resource_from_user_memory = si_buffer_from_user_memory;
        rscreen->b.query_memory_info = r600_query_memory_info;
+       rscreen->b.fence_get_fd = r600_fence_get_fd;
 
        if (rscreen->info.has_hw_decode) {
                rscreen->b.get_video_param = si_vid_get_video_param;

diff --git a/src/gallium/drivers/radeonsi/si_pipe.c b/src/gallium/drivers/radeonsi/si_pipe.c
index 5b5f83a..759d539 100644 (file)
--- a/src/gallium/drivers/radeonsi/si_pipe.c
+++ b/src/gallium/drivers/radeonsi/si_pipe.c
@@ -583,7 +583,6 @@ static int si_get_param(struct pipe_screen* pscreen, enum pipe_cap param)
        case PIPE_CAP_VERTEXID_NOBASE:
        case PIPE_CAP_PRIMITIVE_RESTART_FOR_PATCHES:
        case PIPE_CAP_MAX_WINDOW_RECTANGLES:
-       case PIPE_CAP_NATIVE_FENCE_FD:
        case PIPE_CAP_TGSI_FS_FBFETCH:
        case PIPE_CAP_TGSI_MUL_ZERO_WINS:
        case PIPE_CAP_UMA:
@@ -592,6 +591,9 @@ static int si_get_param(struct pipe_screen* pscreen, enum pipe_cap param)
        case PIPE_CAP_TILE_RASTER_ORDER:
                return 0;
 
+       case PIPE_CAP_NATIVE_FENCE_FD:
+               return sscreen->b.info.has_sync_file;
+
        case PIPE_CAP_QUERY_BUFFER_OBJECT:
                return si_have_tgsi_compute(sscreen);