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 <fcntl.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         struct drm_mode_create_dumb create;
  49         memset(&create, 0, sizeof(create));
  50
  51         create.width = 128;
  52         create.bpp = 8;
  53         create.height = (size + 127) / 128;
  54
  55         int ret = drmIoctl(screen->fd, DRM_IOCTL_MODE_CREATE_DUMB, &create);
  56         if (ret != 0) {
  57                 fprintf(stderr, "create ioctl failure\n");
  58                 abort();
  59         }
  60
  61         bo->handle = create.handle;
  62         assert(create.size >= size);
  63
  64         return bo;
  65 }
  66
  67 void
  68 vc4_bo_free(struct vc4_bo *bo)
  69 {
  70         struct vc4_screen *screen = bo->screen;
  71
  72         if (bo->map) {
  73 #ifdef USE_VC4_SIMULATOR
  74                 if (bo->simulator_winsys_map) {
  75                         free(bo->map);
  76                         bo->map = bo->simulator_winsys_map;
  77                 }
  78 #endif
  79                 munmap(bo->map, bo->size);
  80         }
  81
  82         struct drm_gem_close c;
  83         memset(&c, 0, sizeof(c));
  84         c.handle = bo->handle;
  85         int ret = drmIoctl(screen->fd, DRM_IOCTL_GEM_CLOSE, &c);
  86         if (ret != 0)
  87                 fprintf(stderr, "close object %d: %s\n", bo->handle, strerror(errno));
  88
  89         free(bo);
  90 }
  91
  92 static struct vc4_bo *
  93 vc4_bo_open_handle(struct vc4_screen *screen,
  94                    uint32_t winsys_stride,
  95                    uint32_t handle, uint32_t size)
  96 {
  97         struct vc4_bo *bo = CALLOC_STRUCT(vc4_bo);
  98
  99         assert(size);
 100
 101         pipe_reference_init(&bo->reference, 1);
 102         bo->screen = screen;
 103         bo->handle = handle;
 104         bo->size = size;
 105         bo->name = "winsys";
 106
 107 #ifdef USE_VC4_SIMULATOR
 108         vc4_bo_map(bo);
 109         bo->simulator_winsys_map = bo->map;
 110         bo->simulator_winsys_stride = winsys_stride;
 111         bo->map = malloc(bo->size);
 112 #endif
 113
 114         return bo;
 115 }
 116
 117 struct vc4_bo *
 118 vc4_bo_open_name(struct vc4_screen *screen, uint32_t name,
 119                  uint32_t winsys_stride)
 120 {
 121         struct drm_gem_open o = {
 122                 .name = name
 123         };
 124         int ret = drmIoctl(screen->fd, DRM_IOCTL_GEM_OPEN, &o);
 125         if (ret) {
 126                 fprintf(stderr, "Failed to open bo %d: %s\n",
 127                         name, strerror(errno));
 128                 return NULL;
 129         }
 130
 131         return vc4_bo_open_handle(screen, winsys_stride, o.handle, o.size);
 132 }
 133
 134 struct vc4_bo *
 135 vc4_bo_open_dmabuf(struct vc4_screen *screen, int fd, uint32_t winsys_stride)
 136 {
 137         uint32_t handle;
 138         int ret = drmPrimeFDToHandle(screen->fd, fd, &handle);
 139         int size;
 140         if (ret) {
 141                 fprintf(stderr, "Failed to get vc4 handle for dmabuf %d\n", fd);
 142                 return NULL;
 143         }
 144
 145         /* Determine the size of the bo we were handed. */
 146         size = lseek(fd, 0, SEEK_END);
 147         if (size == -1) {
 148                 fprintf(stderr, "Couldn't get size of dmabuf fd %d.\n", fd);
 149                 return NULL;
 150         }
 151
 152         return vc4_bo_open_handle(screen, winsys_stride, handle, size);
 153 }
 154
 155 int
 156 vc4_bo_get_dmabuf(struct vc4_bo *bo)
 157 {
 158         int fd;
 159         int ret = drmPrimeHandleToFD(bo->screen->fd, bo->handle,
 160                                      O_CLOEXEC, &fd);
 161         if (ret != 0) {
 162                 fprintf(stderr, "Failed to export gem bo %d to dmabuf\n",
 163                         bo->handle);
 164                 return -1;
 165         }
 166
 167         return fd;
 168 }
 169
 170 struct vc4_bo *
 171 vc4_bo_alloc_mem(struct vc4_screen *screen, const void *data, uint32_t size,
 172                  const char *name)
 173 {
 174         void *map;
 175         struct vc4_bo *bo;
 176
 177         bo = vc4_bo_alloc(screen, size, name);
 178         map = vc4_bo_map(bo);
 179         memcpy(map, data, size);
 180         return bo;
 181 }
 182
 183 bool
 184 vc4_bo_flink(struct vc4_bo *bo, uint32_t *name)
 185 {
 186         struct drm_gem_flink flink = {
 187                 .handle = bo->handle,
 188         };
 189         int ret = drmIoctl(bo->screen->fd, DRM_IOCTL_GEM_FLINK, &flink);
 190         if (ret) {
 191                 fprintf(stderr, "Failed to flink bo %d: %s\n",
 192                         bo->handle, strerror(errno));
 193                 free(bo);
 194                 return false;
 195         }
 196
 197         *name = flink.name;
 198
 199         return true;
 200 }
 201
 202 bool
 203 vc4_wait_seqno(struct vc4_screen *screen, uint64_t seqno, uint64_t timeout_ns)
 204 {
 205 #ifndef USE_VC4_SIMULATOR
 206         struct drm_vc4_wait_seqno wait;
 207         memset(&wait, 0, sizeof(wait));
 208         wait.seqno = seqno;
 209         wait.timeout_ns = timeout_ns;
 210
 211         int ret = drmIoctl(screen->fd, DRM_IOCTL_VC4_WAIT_SEQNO, &wait);
 212         if (ret == -ETIME) {
 213                 return false;
 214         } else if (ret != 0) {
 215                 fprintf(stderr, "wait failed\n");
 216                 abort();
 217         } else {
 218                 screen->finished_seqno = wait.seqno;
 219                 return true;
 220         }
 221 #else
 222         return true;
 223 #endif
 224 }
 225
 226 bool
 227 vc4_bo_wait(struct vc4_bo *bo, uint64_t timeout_ns)
 228 {
 229 #ifndef USE_VC4_SIMULATOR
 230         struct vc4_screen *screen = bo->screen;
 231
 232         struct drm_vc4_wait_bo wait;
 233         memset(&wait, 0, sizeof(wait));
 234         wait.handle = bo->handle;
 235         wait.timeout_ns = timeout_ns;
 236
 237         int ret = drmIoctl(screen->fd, DRM_IOCTL_VC4_WAIT_BO, &wait);
 238         if (ret == -ETIME) {
 239                 return false;
 240         } else if (ret != 0) {
 241                 fprintf(stderr, "wait failed\n");
 242                 abort();
 243         } else {
 244                 return true;
 245         }
 246 #else
 247         return true;
 248 #endif
 249 }
 250
 251 void *
 252 vc4_bo_map_unsynchronized(struct vc4_bo *bo)
 253 {
 254         int ret;
 255
 256         if (bo->map)
 257                 return bo->map;
 258
 259         struct drm_mode_map_dumb map;
 260         memset(&map, 0, sizeof(map));
 261         map.handle = bo->handle;
 262         ret = drmIoctl(bo->screen->fd, DRM_IOCTL_MODE_MAP_DUMB, &map);
 263         if (ret != 0) {
 264                 fprintf(stderr, "map ioctl failure\n");
 265                 abort();
 266         }
 267
 268         bo->map = mmap(NULL, bo->size, PROT_READ | PROT_WRITE, MAP_SHARED,
 269                        bo->screen->fd, map.offset);
 270         if (bo->map == MAP_FAILED) {
 271                 fprintf(stderr, "mmap of bo %d (offset 0x%016llx, size %d) failed\n",
 272                         bo->handle, (long long)map.offset, bo->size);
 273                 abort();
 274         }
 275
 276         return bo->map;
 277 }
 278
 279 void *
 280 vc4_bo_map(struct vc4_bo *bo)
 281 {
 282         void *map = vc4_bo_map_unsynchronized(bo);
 283
 284         bool ok = vc4_bo_wait(bo, PIPE_TIMEOUT_INFINITE);
 285         if (!ok) {
 286                 fprintf(stderr, "BO wait for map failed\n");
 287                 abort();
 288         }
 289
 290         return map;
 291 }