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         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                 errx(1, "create ioctl");
  58
  59         bo->handle = create.handle;
  60         assert(create.size >= size);
  61
  62         return bo;
  63 }
  64
  65 void
  66 vc4_bo_free(struct vc4_bo *bo)
  67 {
  68         struct vc4_screen *screen = bo->screen;
  69
  70         if (bo->map) {
  71 #ifdef USE_VC4_SIMULATOR
  72                 if (bo->simulator_winsys_map) {
  73                         free(bo->map);
  74                         bo->map = bo->simulator_winsys_map;
  75                 }
  76 #endif
  77                 munmap(bo->map, bo->size);
  78         }
  79
  80         struct drm_gem_close c;
  81         c.handle = bo->handle;
  82         int ret = drmIoctl(screen->fd, DRM_IOCTL_GEM_CLOSE, &c);
  83         if (ret != 0)
  84                 fprintf(stderr, "close object %d: %s\n", bo->handle, strerror(errno));
  85
  86         free(bo);
  87 }
  88
  89 struct vc4_bo *
  90 vc4_bo_open_name(struct vc4_screen *screen, uint32_t name,
  91                  uint32_t winsys_stride)
  92 {
  93         struct vc4_bo *bo = CALLOC_STRUCT(vc4_bo);
  94
  95         struct drm_gem_open o;
  96         o.name = name;
  97         int ret = drmIoctl(screen->fd, DRM_IOCTL_GEM_OPEN, &o);
  98         if (ret) {
  99                 fprintf(stderr, "Failed to open bo %d: %s\n",
 100                         name, strerror(errno));
 101                 free(bo);
 102                 return NULL;
 103         }
 104
 105         pipe_reference_init(&bo->reference, 1);
 106         bo->screen = screen;
 107         bo->handle = o.handle;
 108         bo->size = o.size;
 109         bo->name = "winsys";
 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         struct drm_gem_flink flink = {
 138                 .handle = bo->handle,
 139         };
 140         int ret = drmIoctl(bo->screen->fd, DRM_IOCTL_GEM_FLINK, &flink);
 141         if (ret) {
 142                 fprintf(stderr, "Failed to flink bo %d: %s\n",
 143                         bo->handle, strerror(errno));
 144                 free(bo);
 145                 return false;
 146         }
 147
 148         *name = flink.name;
 149
 150         return true;
 151 }
 152
 153 void *
 154 vc4_bo_map(struct vc4_bo *bo)
 155 {
 156         int ret;
 157
 158         if (bo->map)
 159                 return bo->map;
 160
 161         struct drm_mode_map_dumb map;
 162         memset(&map, 0, sizeof(map));
 163         map.handle = bo->handle;
 164         ret = drmIoctl(bo->screen->fd, DRM_IOCTL_MODE_MAP_DUMB, &map);
 165         if (ret != 0)
 166                 errx(1, "map ioctl");
 167
 168         bo->map = mmap(NULL, bo->size, PROT_READ | PROT_WRITE, MAP_SHARED,
 169                        bo->screen->fd, map.offset);
 170         if (bo->map == MAP_FAILED) {
 171                 errx(1, "mmap of bo %d (offset 0x%016llx, size %d) failed\n",
 172                      bo->handle, (long long)map.offset, bo->size);
 173         }
 174
 175         return bo->map;
 176 }