src/mesa/state_tracker/st_cb_memoryobjects.c

/*
 * Copyright © 2017 Red Hat.
 * Copyright © 2017 Valve Corporation.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 */


#include "main/mtypes.h"

#include "main/externalobjects.h"

#include "st_context.h"
#include "st_cb_memoryobjects.h"
#include "st_util.h"

#include "frontend/drm_driver.h"
#include "pipe/p_context.h"
#include "pipe/p_screen.h"

#ifdef HAVE_LIBDRM
#include "drm-uapi/drm_fourcc.h"
#endif

static struct gl_memory_object *
st_memoryobj_alloc(struct gl_context *ctx, GLuint name)
{
   struct st_memory_object *st_obj = ST_CALLOC_STRUCT(st_memory_object);
   if (!st_obj)
      return NULL;

   _mesa_initialize_memory_object(ctx, &st_obj->Base, name);
   return &st_obj->Base;
}

static void
st_memoryobj_free(struct gl_context *ctx,
                  struct gl_memory_object *obj)
{
   struct st_memory_object *st_obj = st_memory_object(obj);
   struct st_context *st = st_context(ctx);
   struct pipe_context *pipe = st->pipe;
   struct pipe_screen *screen = pipe->screen;

   screen->memobj_destroy(screen, st_obj->memory);
   _mesa_delete_memory_object(ctx, obj);
}


static void
st_import_memoryobj_fd(struct gl_context *ctx,
                       struct gl_memory_object *obj,
                       GLuint64 size,
                       int fd)
{
   struct st_memory_object *st_obj = st_memory_object(obj);
   struct st_context *st = st_context(ctx);
   struct pipe_context *pipe = st->pipe;
   struct pipe_screen *screen = pipe->screen;
   struct winsys_handle whandle = {
      .type = WINSYS_HANDLE_TYPE_FD,
      .handle = fd,
#ifdef HAVE_LIBDRM
      .modifier = DRM_FORMAT_MOD_INVALID,
#endif
   };

   st_obj->memory = screen->memobj_create_from_handle(screen,
                                                      &whandle,
                                                      obj->Dedicated);

#if !defined(_WIN32)
   /* We own fd, but we no longer need it. So get rid of it */
   close(fd);
#endif
}

void
st_init_memoryobject_functions(struct dd_function_table *functions)
{
   functions->NewMemoryObject = st_memoryobj_alloc;
   functions->DeleteMemoryObject = st_memoryobj_free;
   functions->ImportMemoryObjectFd = st_import_memoryobj_fd;
}