src/gallium/drivers/vc4/vc4_bufmgr.c

   1 /*
   2  * Copyright © 2014 Broadcom
   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  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * 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 NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  21  * IN THE SOFTWARE.
  22  */
  23
  24 #include <errno.h>
  25 #include <err.h>
  26 #include <stdio.h>
  27 #include <sys/mman.h>
  28 #include <xf86drm.h>
  29 #include <xf86drmMode.h>
  30
  31 #include "util/u_memory.h"
  32
  33 #include "vc4_context.h"
  34 #include "vc4_screen.h"
  35
  36 struct vc4_bo *
  37 vc4_bo_alloc(struct vc4_screen *screen, uint32_t size, const char *name)
  38 {
  39         struct vc4_bo *bo = CALLOC_STRUCT(vc4_bo);
  40         if (!bo)
  41                 return NULL;
  42
  43         pipe_reference_init(&bo->reference, 1);
  44         bo->screen = screen;
  45         bo->size = size;
  46         bo->name = name;
  47
  48 #ifndef USE_VC4_SIMULATOR
  49         struct drm_mode_create_dumb create;
  50         memset(&create, 0, sizeof(create));
  51
  52         create.width = 128;
  53         create.bpp = 8;
  54         create.height = (size + 127) / 128;
  55
  56         int ret = drmIoctl(screen->fd, DRM_IOCTL_MODE_CREATE_DUMB, &create);
  57         if (ret != 0)
  58                 errx(1, "create ioctl");
  59
  60         bo->handle = create.handle;
  61         assert(create.size >= size);
  62 #else /* USE_VC4_SIMULATOR */
  63         static int next_handle = 0;
  64         bo->handle = next_handle++;
  65
  66         bo->map = malloc(size);
  67 #endif /* USE_VC4_SIMULATOR */
  68
  69         return bo;
  70 }
  71
  72 void
  73 vc4_bo_free(struct vc4_bo *bo)
  74 {
  75 #ifndef USE_VC4_SIMULATOR
  76         struct vc4_screen *screen = bo->screen;
  77
  78         struct drm_gem_close c;
  79         c.handle = bo->handle;
  80         int ret = drmIoctl(screen->fd, DRM_IOCTL_GEM_CLOSE, &c);
  81         if (ret != 0)
  82                 fprintf(stderr, "close object %d: %s\n", bo->handle, strerror(errno));
  83 #else
  84         free(bo->map);
  85 #endif
  86
  87         free(bo);
  88 }
  89
  90 struct vc4_bo *
  91 vc4_bo_open_name(struct vc4_screen *screen, uint32_t name,
  92                  uint32_t winsys_stride)
  93 {
  94         struct vc4_bo *bo = CALLOC_STRUCT(vc4_bo);
  95
  96         struct drm_gem_open o;
  97         o.name = name;
  98         int ret = drmIoctl(screen->fd, DRM_IOCTL_GEM_OPEN, &o);
  99         if (ret) {
 100                 fprintf(stderr, "Failed to open bo %d: %s\n",
 101                         name, strerror(errno));
 102                 free(bo);
 103                 return NULL;
 104         }
 105
 106         pipe_reference_init(&bo->reference, 1);
 107         bo->screen = screen;
 108         bo->handle = o.handle;
 109         bo->size = o.size;
 110
 111 #ifdef USE_VC4_SIMULATOR
 112         vc4_bo_map(bo);
 113         bo->simulator_winsys_map = bo->map;
 114         bo->simulator_winsys_stride = winsys_stride;
 115         bo->map = malloc(bo->size);
 116 #endif
 117
 118         return bo;
 119 }
 120
 121 struct vc4_bo *
 122 vc4_bo_alloc_mem(struct vc4_screen *screen, const void *data, uint32_t size,
 123                  const char *name)
 124 {
 125         void *map;
 126         struct vc4_bo *bo;
 127
 128         bo = vc4_bo_alloc(screen, size, name);
 129         map = vc4_bo_map(bo);
 130         memcpy(map, data, size);
 131         return bo;
 132 }
 133
 134 bool
 135 vc4_bo_flink(struct vc4_bo *bo, uint32_t *name)
 136 {
 137 #ifndef USE_VC4_SIMULATOR
 138         struct drm_gem_flink flink = {
 139                 .handle = bo->handle,
 140         };
 141         int ret = drmIoctl(bo->screen->fd, DRM_IOCTL_GEM_FLINK, &flink);
 142         if (ret) {
 143                 fprintf(stderr, "Failed to flink bo %d: %s\n",
 144                         bo->handle, strerror(errno));
 145                 free(bo);
 146                 return false;
 147         }
 148
 149         *name = flink.name;
 150 #endif /* USE_VC4_SIMULATOR */
 151
 152         return true;
 153 }
 154
 155 void *
 156 vc4_bo_map(struct vc4_bo *bo)
 157 {
 158         int ret;
 159
 160         if (bo->map)
 161                 return bo->map;
 162
 163         struct drm_mode_map_dumb map;
 164         memset(&map, 0, sizeof(map));
 165         map.handle = bo->handle;
 166         ret = drmIoctl(bo->screen->fd, DRM_IOCTL_MODE_MAP_DUMB, &map);
 167         if (ret != 0)
 168                 errx(1, "map ioctl");
 169
 170         bo->map = mmap(NULL, bo->size, PROT_READ | PROT_WRITE, MAP_SHARED,
 171                        bo->screen->fd, map.offset);
 172         if (bo->map == MAP_FAILED) {
 173                 errx(1, "mmap of bo %d (offset 0x%016llx, size %d) failed\n",
 174                      bo->handle, (long long)map.offset, bo->size);
 175         }
 176
 177         return bo->map;
 178 }