freedreno: Add aux-context support

A global aux-context can be created on-demand for cases where we need to
(for example) blit a resource when we only have a screen ptr.

Signed-off-by: Rob Clark <robdclark@chromium.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/23324>

diff --git a/src/gallium/drivers/freedreno/freedreno_screen.c b/src/gallium/drivers/freedreno/freedreno_screen.c
index 918f390..22042a8 100644 (file)
--- a/src/gallium/drivers/freedreno/freedreno_screen.c
+++ b/src/gallium/drivers/freedreno/freedreno_screen.c
@@ -146,6 +146,9 @@ fd_screen_destroy(struct pipe_screen *pscreen)
 {
    struct fd_screen *screen = fd_screen(pscreen);
 
+   if (screen->aux_ctx)
+      screen->aux_ctx->destroy(screen->aux_ctx);
+
    if (screen->tess_bo)
       fd_bo_del(screen->tess_bo);
 
@@ -1230,9 +1233,34 @@ fd_screen_create(int fd,
 
    slab_create_parent(&screen->transfer_pool, sizeof(struct fd_transfer), 16);
 
+   simple_mtx_init(&screen->aux_ctx_lock, mtx_plain);
+
    return pscreen;
 
 fail:
    fd_screen_destroy(pscreen);
    return NULL;
 }
+
+struct fd_context *
+fd_screen_aux_context_get(struct pipe_screen *pscreen)
+{
+   struct fd_screen *screen = fd_screen(pscreen);
+
+   simple_mtx_lock(&screen->aux_ctx_lock);
+
+   if (!screen->aux_ctx) {
+      screen->aux_ctx = pscreen->context_create(pscreen, NULL, 0);
+   }
+
+   return fd_context(screen->aux_ctx);
+}
+
+void
+fd_screen_aux_context_put(struct pipe_screen *pscreen)
+{
+   struct fd_screen *screen = fd_screen(pscreen);
+
+   screen->aux_ctx->flush(screen->aux_ctx, NULL, 0);
+   simple_mtx_unlock(&screen->aux_ctx_lock);
+}

diff --git a/src/gallium/drivers/freedreno/freedreno_screen.h b/src/gallium/drivers/freedreno/freedreno_screen.h
index 466e203..c8a814e 100644 (file)
--- a/src/gallium/drivers/freedreno/freedreno_screen.h
+++ b/src/gallium/drivers/freedreno/freedreno_screen.h
@@ -170,6 +170,9 @@ struct fd_screen {
     */
    const enum pc_di_primtype *primtypes;
    uint32_t primtypes_mask;
+
+   simple_mtx_t aux_ctx_lock;
+   struct pipe_context *aux_ctx;
 };
 
 static inline struct fd_screen *
@@ -178,6 +181,10 @@ fd_screen(struct pipe_screen *pscreen)
    return (struct fd_screen *)pscreen;
 }
 
+struct fd_context;
+struct fd_context * fd_screen_aux_context_get(struct pipe_screen *pscreen);
+void fd_screen_aux_context_put(struct pipe_screen *pscreen);
+
 static inline void
 fd_screen_lock(struct fd_screen *screen)
 {