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      1 /*
      2  * Copyright  2017 Red Hat.
      3  * Copyright  2017 Valve Corporation.
      4  *
      5  * Permission is hereby granted, free of charge, to any person obtaining a
      6  * copy of this software and associated documentation files (the "Software"),
      7  * to deal in the Software without restriction, including without limitation
      8  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
      9  * and/or sell copies of the Software, and to permit persons to whom the
     10  * Software is furnished to do so, subject to the following conditions:
     11  *
     12  * The above copyright notice and this permission notice (including the next
     13  * paragraph) shall be included in all copies or substantial portions of the
     14  * Software.
     15  *
     16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
     19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
     20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
     21  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
     22  * DEALINGS IN THE SOFTWARE.
     23  */
     24 
     25 #include "main/imports.h"
     26 #include "main/mtypes.h"
     27 
     28 #include "main/externalobjects.h"
     29 
     30 #include "st_context.h"
     31 #include "st_cb_memoryobjects.h"
     32 
     33 #include "state_tracker/drm_driver.h"
     34 #include "pipe/p_context.h"
     35 #include "pipe/p_screen.h"
     36 
     37 static struct gl_memory_object *
     38 st_memoryobj_alloc(struct gl_context *ctx, GLuint name)
     39 {
     40    struct st_memory_object *st_obj = ST_CALLOC_STRUCT(st_memory_object);
     41    if (!st_obj)
     42       return NULL;
     43 
     44    _mesa_initialize_memory_object(ctx, &st_obj->Base, name);
     45    return &st_obj->Base;
     46 }
     47 
     48 static void
     49 st_memoryobj_free(struct gl_context *ctx,
     50                   struct gl_memory_object *obj)
     51 {
     52    _mesa_delete_memory_object(ctx, obj);
     53 }
     54 
     55 
     56 static void
     57 st_import_memoryobj_fd(struct gl_context *ctx,
     58                        struct gl_memory_object *obj,
     59                        GLuint64 size,
     60                        int fd)
     61 {
     62    struct st_memory_object *st_obj = st_memory_object(obj);
     63    struct st_context *st = st_context(ctx);
     64    struct pipe_context *pipe = st->pipe;
     65    struct pipe_screen *screen = pipe->screen;
     66    struct winsys_handle whandle;
     67 
     68    whandle.type = DRM_API_HANDLE_TYPE_FD;
     69    whandle.handle = fd;
     70    whandle.offset = 0;
     71    whandle.layer = 0;
     72    whandle.stride = 0;
     73 
     74    st_obj->memory = screen->memobj_create_from_handle(screen,
     75                                                       &whandle,
     76                                                       obj->Dedicated);
     77 
     78 #if !defined(_WIN32)
     79    /* We own fd, but we no longer need it. So get rid of it */
     80    close(fd);
     81 #endif
     82 }
     83 
     84 void
     85 st_init_memoryobject_functions(struct dd_function_table *functions)
     86 {
     87    functions->NewMemoryObject = st_memoryobj_alloc;
     88    functions->DeleteMemoryObject = st_memoryobj_free;
     89    functions->ImportMemoryObjectFd = st_import_memoryobj_fd;
     90 }
     91