nvc0/nv50: support and enable PIPE_CAP_MEMOBJ

./glcts --deqp-case=dEQP-EGL.functional.get_proc_address.extension.gl_ext_memory_object*

Test run totals:
  Passed:        3/3 (100.0%)
  Failed:        0/3 (0.0%)
  Not supported: 0/3 (0.0%)
  Warnings:      0/3 (0.0%)
  Waived:        0/3 (0.0%)

Signed-off-by: Yusuf Khan <yusisamerican@gmail.com>

src/gallium/drivers/nouveau/nv50/nv50_resource.c

@@ -113,6 +113,75 @@ nv50_resource_from_user_memory(struct pipe_screen *pipe,
    return nouveau_buffer_create_from_user(pipe, templ, user_memory);
 }
 
+struct pipe_memory_object *
+nv50_memobj_create_from_handle(struct pipe_screen *screen,
+                               struct winsys_handle *handle,
+                               bool dedicated)
+{
+   struct nv50_memobj *memobj = CALLOC_STRUCT(nv50_memobj);
+
+   memobj->bo = nouveau_screen_bo_from_handle(screen, handle, &memobj->stride);
+   if (memobj->bo == NULL) {
+      FREE(memobj->bo);
+      return NULL;
+   }
+   memobj->handle = handle;
+   memobj->b.dedicated = dedicated;
+
+   return &memobj->b;
+}
+
+void
+nv50_memobj_destroy(struct pipe_screen *screen,
+                    struct pipe_memory_object *pmemobj)
+{
+   struct nv50_memobj *memobj = (struct nv50_memobj *)pmemobj;
+
+   free(memobj->handle);
+   free(memobj->bo);
+   free(memobj);
+}
+
+struct pipe_resource *
+nv50_resource_from_memobj(struct pipe_screen *screen,
+                          const struct pipe_resource *templ,
+                          struct pipe_memory_object *pmemobj,
+                          uint64_t offset)
+{
+   struct nv50_miptree *mt;
+   struct nv50_memobj *memobj = (struct nv50_memobj *)pmemobj;
+   unsigned stride;
+
+   /* only supports 2D, non-mipmapped textures for the moment */
+   if ((templ->target != PIPE_TEXTURE_2D &&
+        templ->target != PIPE_TEXTURE_RECT) ||
+       templ->last_level != 0 ||
+       templ->depth0 != 1 ||
+       templ->array_size > 1)
+      return NULL;
+
+   mt = CALLOC_STRUCT(nv50_miptree);
+   if (!mt)
+      return NULL;
+
+   mt->base.bo = memobj->bo;
+
+   mt->base.domain = mt->base.bo->flags & NOUVEAU_BO_APER;
+   mt->base.address = mt->base.bo->offset;
+
+   mt->base.base = *templ;
+   pipe_reference_init(&mt->base.base.reference, 1);
+   mt->base.base.screen = screen;
+   mt->level[0].pitch = stride;
+   mt->level[0].offset = 0;
+   mt->level[0].tile_mode = mt->base.bo->config.nv50.tile_mode;
+
+   NOUVEAU_DRV_STAT(nouveau_screen(screen), tex_obj_current_count, 1);
+
+   /* no need to adjust bo reference count */
+   return &mt->base.base;
+}
+
 void
 nv50_init_resource_functions(struct pipe_context *pcontext)
 {
@@ -135,4 +204,8 @@ nv50_screen_init_resource_functions(struct pipe_screen *pscreen)
    pscreen->resource_from_handle = nv50_resource_from_handle;
    pscreen->resource_get_handle = nv50_miptree_get_handle;
    pscreen->resource_destroy = nv50_resource_destroy;
+
+   pscreen->memobj_create_from_handle = nv50_memobj_create_from_handle;
+   pscreen->resource_from_memobj = nv50_resource_from_memobj;
+   pscreen->memobj_destroy = nv50_memobj_destroy;
 }

src/gallium/drivers/nouveau/nv50/nv50_resource.h

@@ -43,6 +43,13 @@ struct nv50_miptree_level {
    uint32_t tile_mode;
 };
 
+struct nv50_memobj {
+   struct winsys_handle *handle;
+   struct pipe_memory_object b;
+   struct nouveau_bo *bo;
+   unsigned stride;
+};
+
 #define NV50_MAX_TEXTURE_LEVELS 16
 
 struct nv50_miptree {
@@ -169,4 +176,19 @@ nv50_resource_from_user_memory(struct pipe_screen *pipe,
                                const struct pipe_resource *templ,
                                void *user_memory);
 
+struct pipe_memory_object *
+nv50_memobj_create_from_handle(struct pipe_screen *screen,
+                               struct winsys_handle *handle,
+                               bool dedicated);
+
+struct pipe_resource *
+nv50_resource_from_memobj(struct pipe_screen *screen,
+                          const struct pipe_resource *t,
+                          struct pipe_memory_object *pmemobj,
+                          uint64_t offset);
+
+void
+nv50_memobj_destroy(struct pipe_screen *screen,
+                    struct pipe_memory_object *pmemobj);
+
 #endif /* __NV50_RESOURCE_H__ */

src/gallium/drivers/nouveau/nv50/nv50_screen.c

@@ -233,6 +233,7 @@ nv50_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
    case PIPE_CAP_SAMPLER_VIEW_TARGET:
    case PIPE_CAP_CONDITIONAL_RENDER_INVERTED:
    case PIPE_CAP_CLIP_HALFZ:
+   case PIPE_CAP_MEMOBJ:
    case PIPE_CAP_POLYGON_OFFSET_CLAMP:
    case PIPE_CAP_QUERY_PIPELINE_STATISTICS:
    case PIPE_CAP_TEXTURE_FLOAT_LINEAR:
@@ -349,7 +350,6 @@ nv50_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
    case PIPE_CAP_BINDLESS_TEXTURE:
    case PIPE_CAP_NIR_SAMPLERS_AS_DEREF:
    case PIPE_CAP_QUERY_SO_OVERFLOW:
-   case PIPE_CAP_MEMOBJ:
    case PIPE_CAP_LOAD_CONSTBUF:
    case PIPE_CAP_TILE_RASTER_ORDER:
    case PIPE_CAP_FRAMEBUFFER_MSAA_CONSTRAINTS:

src/gallium/drivers/nouveau/nvc0/nvc0_resource.c

@@ -162,4 +162,8 @@ nvc0_screen_init_resource_functions(struct pipe_screen *pscreen)
    pscreen->resource_get_handle = nvc0_miptree_get_handle;
    pscreen->resource_destroy = nvc0_resource_destroy;
    pscreen->resource_from_user_memory = nv50_resource_from_user_memory;
+
+   pscreen->memobj_create_from_handle = nv50_memobj_create_from_handle;
+   pscreen->resource_from_memobj = nv50_resource_from_memobj;
+   pscreen->memobj_destroy = nv50_memobj_destroy;
 }

src/gallium/drivers/nouveau/nvc0/nvc0_screen.c

@@ -275,6 +275,7 @@ nvc0_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
    case PIPE_CAP_DRAW_PARAMETERS:
    case PIPE_CAP_SHADER_PACK_HALF_FLOAT:
    case PIPE_CAP_MULTI_DRAW_INDIRECT:
+   case PIPE_CAP_MEMOBJ:
    case PIPE_CAP_MULTI_DRAW_INDIRECT_PARAMS:
    case PIPE_CAP_FS_FACE_IS_INTEGER_SYSVAL:
    case PIPE_CAP_QUERY_BUFFER_OBJECT:
@@ -384,7 +385,6 @@ nvc0_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
    case PIPE_CAP_NATIVE_FENCE_FD:
    case PIPE_CAP_SPARSE_BUFFER_PAGE_SIZE:
    case PIPE_CAP_NIR_SAMPLERS_AS_DEREF:
-   case PIPE_CAP_MEMOBJ:
    case PIPE_CAP_LOAD_CONSTBUF:
    case PIPE_CAP_TILE_RASTER_ORDER:
    case PIPE_CAP_MAX_COMBINED_SHADER_OUTPUT_RESOURCES: