src/gallium/winsys/r600/drm/radeon_bo.c

   1 /*
   2  * Copyright 2010 Jerome Glisse <glisse@freedesktop.org>
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * on the rights to use, copy, modify, merge, publish, distribute, sub
   8  * license, and/or sell copies of the Software, and to permit persons to whom
   9  * the Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
  18  * THE AUTHOR(S) AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
  19  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  20  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  21  * USE OR OTHER DEALINGS IN THE SOFTWARE.
  22  *
  23  * Authors:
  24  *      Jerome Glisse
  25  */
  26 #define _FILE_OFFSET_BITS 64
  27 #include <stdio.h>
  28 #include <stdlib.h>
  29 #include <string.h>
  30 #include <sys/mman.h>
  31 #include <errno.h>
  32 #include "radeon_priv.h"
  33 #include "xf86drm.h"
  34 #include "radeon_drm.h"
  35
  36 struct radeon_bo *radeon_bo(struct radeon *radeon, unsigned handle,
  37                         unsigned size, unsigned alignment, void *ptr)
  38 {
  39         struct radeon_bo *bo;
  40         int r;
  41
  42         bo = calloc(1, sizeof(*bo));
  43         if (bo == NULL) {
  44                 return NULL;
  45         }
  46         bo->size = size;
  47         bo->handle = handle;
  48         bo->refcount = 1;
  49         bo->alignment = alignment;
  50
  51         if (handle) {
  52                 struct drm_gem_open open_arg;
  53
  54                 memset(&open_arg, 0, sizeof(open_arg));
  55                 open_arg.name = handle;
  56                 r = drmIoctl(radeon->fd, DRM_IOCTL_GEM_OPEN, &open_arg);
  57                 if (r != 0) {
  58                         free(bo);
  59                         return NULL;
  60                 }
  61                 bo->handle = open_arg.handle;
  62                 bo->size = open_arg.size;
  63         } else {
  64                 struct drm_radeon_gem_create args;
  65
  66                 args.size = size;
  67                 args.alignment = alignment;
  68                 args.initial_domain = RADEON_GEM_DOMAIN_CPU;
  69                 args.flags = 0;
  70                 args.handle = 0;
  71                 r = drmCommandWriteRead(radeon->fd, DRM_RADEON_GEM_CREATE,
  72                                         &args, sizeof(args));
  73                 bo->handle = args.handle;
  74                 if (r) {
  75                         fprintf(stderr, "Failed to allocate :\n");
  76                         fprintf(stderr, "   size      : %d bytes\n", size);
  77                         fprintf(stderr, "   alignment : %d bytes\n", alignment);
  78                         free(bo);
  79                         return NULL;
  80                 }
  81         }
  82         if (ptr) {
  83                 if (radeon_bo_map(radeon, bo)) {
  84                         fprintf(stderr, "%s failed to copy data into bo\n", __func__);
  85                         return radeon_bo_decref(radeon, bo);
  86                 }
  87                 memcpy(bo->data, ptr, size);
  88                 radeon_bo_unmap(radeon, bo);
  89         }
  90         return bo;
  91 }
  92
  93 int radeon_bo_map(struct radeon *radeon, struct radeon_bo *bo)
  94 {
  95         struct drm_radeon_gem_mmap args;
  96         void *ptr;
  97         int r;
  98
  99         if (bo->map_count++ != 0) {
 100                 return 0;
 101         }
 102         /* Zero out args to make valgrind happy */
 103         memset(&args, 0, sizeof(args));
 104         args.handle = bo->handle;
 105         args.offset = 0;
 106         args.size = (uint64_t)bo->size;
 107         r = drmCommandWriteRead(radeon->fd, DRM_RADEON_GEM_MMAP,
 108                                 &args, sizeof(args));
 109         if (r) {
 110                 fprintf(stderr, "error mapping %p 0x%08X (error = %d)\n",
 111                         bo, bo->handle, r);
 112                 return r;
 113         }
 114         ptr = mmap(0, args.size, PROT_READ|PROT_WRITE, MAP_SHARED, radeon->fd, args.addr_ptr);
 115         if (ptr == MAP_FAILED) {
 116                 fprintf(stderr, "%s failed to map bo\n", __func__);
 117                 return -errno;
 118         }
 119         bo->data = ptr;
 120         return 0;
 121 }
 122
 123 void radeon_bo_unmap(struct radeon *radeon, struct radeon_bo *bo)
 124 {
 125         if (--bo->map_count > 0) {
 126                 return;
 127         }
 128         munmap(bo->data, bo->size);
 129         bo->data = NULL;
 130 }
 131
 132 struct radeon_bo *radeon_bo_incref(struct radeon *radeon, struct radeon_bo *bo)
 133 {
 134         bo->refcount++;
 135         return bo;
 136 }
 137
 138 struct radeon_bo *radeon_bo_decref(struct radeon *radeon, struct radeon_bo *bo)
 139 {
 140         struct drm_gem_close args;
 141
 142         if (bo == NULL)
 143                 return NULL;
 144         if (--bo->refcount > 0) {
 145                 return NULL;
 146         }
 147
 148         if (bo->map_count) {
 149                 munmap(bo->data, bo->size);
 150         }
 151         memset(&args, 0, sizeof(args));
 152         args.handle = bo->handle;
 153         drmIoctl(radeon->fd, DRM_IOCTL_GEM_CLOSE, &args);
 154         memset(bo, 0, sizeof(struct radeon_bo));
 155         free(bo);
 156         return NULL;
 157 }
 158
 159 int radeon_bo_wait(struct radeon *radeon, struct radeon_bo *bo)
 160 {
 161         struct drm_radeon_gem_wait_idle args;
 162         int ret;
 163
 164         /* Zero out args to make valgrind happy */
 165         memset(&args, 0, sizeof(args));
 166         args.handle = bo->handle;
 167         do {
 168                 ret = drmCommandWriteRead(radeon->fd, DRM_RADEON_GEM_WAIT_IDLE,
 169                                         &args, sizeof(args));
 170         } while (ret == -EBUSY);
 171         return ret;
 172 }