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 <sys/mman.h>
  27 #include <xf86drm.h>
  28 #include <xf86drmMode.h>
  29
  30 #include "util/u_memory.h"
  31
  32 #include "vc4_context.h"
  33 #include "vc4_screen.h"
  34
  35 struct vc4_bo *
  36 vc4_bo_alloc(struct vc4_screen *screen, uint32_t size, const char *name)
  37 {
  38         struct vc4_bo *bo = CALLOC_STRUCT(vc4_bo);
  39         if (!bo)
  40                 return NULL;
  41
  42         pipe_reference_init(&bo->reference, 1);
  43         bo->screen = screen;
  44         bo->size = size;
  45         bo->name = name;
  46
  47         struct drm_mode_create_dumb create;
  48         memset(&create, 0, sizeof(create));
  49
  50         create.width = 128;
  51         create.bpp = 8;
  52         create.height = (size + 127) / 128;
  53
  54         int ret = drmIoctl(screen->fd, DRM_IOCTL_MODE_CREATE_DUMB, &create);
  55         if (ret != 0) {
  56                 fprintf(stderr, "create ioctl failure\n");
  57                 abort();
  58         }
  59
  60         bo->handle = create.handle;
  61         assert(create.size >= size);
  62
  63         return bo;
  64 }
  65
  66 void
  67 vc4_bo_free(struct vc4_bo *bo)
  68 {
  69         struct vc4_screen *screen = bo->screen;
  70
  71         if (bo->map) {
  72 #ifdef USE_VC4_SIMULATOR
  73                 if (bo->simulator_winsys_map) {
  74                         free(bo->map);
  75                         bo->map = bo->simulator_winsys_map;
  76                 }
  77 #endif
  78                 munmap(bo->map, bo->size);
  79         }
  80
  81         struct drm_gem_close c;
  82         memset(&c, 0, sizeof(c));
  83         c.handle = bo->handle;
  84         int ret = drmIoctl(screen->fd, DRM_IOCTL_GEM_CLOSE, &c);
  85         if (ret != 0)
  86                 fprintf(stderr, "close object %d: %s\n", bo->handle, strerror(errno));
  87
  88         free(bo);
  89 }
  90
  91 struct vc4_bo *
  92 vc4_bo_open_name(struct vc4_screen *screen, uint32_t name,
  93                  uint32_t winsys_stride)
  94 {
  95         struct vc4_bo *bo = CALLOC_STRUCT(vc4_bo);
  96
  97         struct drm_gem_open o;
  98         o.name = name;
  99         int ret = drmIoctl(screen->fd, DRM_IOCTL_GEM_OPEN, &o);
 100         if (ret) {
 101                 fprintf(stderr, "Failed to open bo %d: %s\n",
 102                         name, strerror(errno));
 103                 free(bo);
 104                 return NULL;
 105         }
 106
 107         pipe_reference_init(&bo->reference, 1);
 108         bo->screen = screen;
 109         bo->handle = o.handle;
 110         bo->size = o.size;
 111         bo->name = "winsys";
 112
 113 #ifdef USE_VC4_SIMULATOR
 114         vc4_bo_map(bo);
 115         bo->simulator_winsys_map = bo->map;
 116         bo->simulator_winsys_stride = winsys_stride;
 117         bo->map = malloc(bo->size);
 118 #endif
 119
 120         return bo;
 121 }
 122
 123 struct vc4_bo *
 124 vc4_bo_alloc_mem(struct vc4_screen *screen, const void *data, uint32_t size,
 125                  const char *name)
 126 {
 127         void *map;
 128         struct vc4_bo *bo;
 129
 130         bo = vc4_bo_alloc(screen, size, name);
 131         map = vc4_bo_map(bo);
 132         memcpy(map, data, size);
 133         return bo;
 134 }
 135
 136 bool
 137 vc4_bo_flink(struct vc4_bo *bo, uint32_t *name)
 138 {
 139         struct drm_gem_flink flink = {
 140                 .handle = bo->handle,
 141         };
 142         int ret = drmIoctl(bo->screen->fd, DRM_IOCTL_GEM_FLINK, &flink);
 143         if (ret) {
 144                 fprintf(stderr, "Failed to flink bo %d: %s\n",
 145                         bo->handle, strerror(errno));
 146                 free(bo);
 147                 return false;
 148         }
 149
 150         *name = flink.name;
 151
 152         return true;
 153 }
 154
 155 bool
 156 vc4_wait_seqno(struct vc4_screen *screen, uint64_t seqno, uint64_t timeout_ns)
 157 {
 158 #ifndef USE_VC4_SIMULATOR
 159         struct drm_vc4_wait_seqno wait;
 160         memset(&wait, 0, sizeof(wait));
 161         wait.seqno = seqno;
 162         wait.timeout_ns = timeout_ns;
 163
 164         int ret = drmIoctl(screen->fd, DRM_IOCTL_VC4_WAIT_SEQNO, &wait);
 165         if (ret == -ETIME) {
 166                 return false;
 167         } else if (ret != 0) {
 168                 fprintf(stderr, "wait failed\n");
 169                 abort();
 170         } else {
 171                 screen->finished_seqno = wait.seqno;
 172                 return true;
 173         }
 174 #else
 175         return true;
 176 #endif
 177 }
 178
 179 bool
 180 vc4_bo_wait(struct vc4_bo *bo, uint64_t timeout_ns)
 181 {
 182 #ifndef USE_VC4_SIMULATOR
 183         struct vc4_screen *screen = bo->screen;
 184
 185         struct drm_vc4_wait_bo wait;
 186         memset(&wait, 0, sizeof(wait));
 187         wait.handle = bo->handle;
 188         wait.timeout_ns = timeout_ns;
 189
 190         int ret = drmIoctl(screen->fd, DRM_IOCTL_VC4_WAIT_BO, &wait);
 191         if (ret == -ETIME) {
 192                 return false;
 193         } else if (ret != 0) {
 194                 fprintf(stderr, "wait failed\n");
 195                 abort();
 196         } else {
 197                 return true;
 198         }
 199 #else
 200         return true;
 201 #endif
 202 }
 203
 204 void *
 205 vc4_bo_map_unsynchronized(struct vc4_bo *bo)
 206 {
 207         int ret;
 208
 209         if (bo->map)
 210                 return bo->map;
 211
 212         struct drm_mode_map_dumb map;
 213         memset(&map, 0, sizeof(map));
 214         map.handle = bo->handle;
 215         ret = drmIoctl(bo->screen->fd, DRM_IOCTL_MODE_MAP_DUMB, &map);
 216         if (ret != 0) {
 217                 fprintf(stderr, "map ioctl failure\n");
 218                 abort();
 219         }
 220
 221         bo->map = mmap(NULL, bo->size, PROT_READ | PROT_WRITE, MAP_SHARED,
 222                        bo->screen->fd, map.offset);
 223         if (bo->map == MAP_FAILED) {
 224                 fprintf(stderr, "mmap of bo %d (offset 0x%016llx, size %d) failed\n",
 225                         bo->handle, (long long)map.offset, bo->size);
 226                 abort();
 227         }
 228
 229         return bo->map;
 230 }
 231
 232 void *
 233 vc4_bo_map(struct vc4_bo *bo)
 234 {
 235         void *map = vc4_bo_map_unsynchronized(bo);
 236
 237         bool ok = vc4_bo_wait(bo, PIPE_TIMEOUT_INFINITE);
 238         if (!ok) {
 239                 fprintf(stderr, "BO wait for map failed\n");
 240                 abort();
 241         }
 242
 243         return map;
 244 }