src/gallium/winsys/drm/radeon/core/radeon_drm.c

   1 /*
   2  * Copyright © 2009 Corbin Simpson
   3  * All Rights Reserved.
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining
   6  * a copy of this software and associated documentation files (the
   7  * "Software"), to deal in the Software without restriction, including
   8  * without limitation the rights to use, copy, modify, merge, publish,
   9  * distribute, sub license, and/or sell copies of the Software, and to
  10  * permit persons to whom the Software is furnished to do so, subject to
  11  * the following conditions:
  12  *
  13  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  14  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
  15  * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  16  * NON-INFRINGEMENT. IN NO EVENT SHALL THE COPYRIGHT HOLDERS, AUTHORS
  17  * AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  18  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  19  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  20  * USE OR OTHER DEALINGS IN THE SOFTWARE.
  21  *
  22  * The above copyright notice and this permission notice (including the
  23  * next paragraph) shall be included in all copies or substantial portions
  24  * of the Software.
  25  */
  26 /*
  27  * Authors:
  28  *      Corbin Simpson <MostAwesomeDude@gmail.com>
  29  *      Joakim Sindholt <opensource@zhasha.com>
  30  */
  31
  32 #include "radeon_drm.h"
  33
  34 /* Helper function to do the ioctls needed for setup and init. */
  35 static void do_ioctls(int fd, struct radeon_winsys* winsys)
  36 {
  37     struct drm_radeon_gem_info gem_info = {0};
  38     struct drm_radeon_info info = {0};
  39     int target = 0;
  40     int retval;
  41     drmVersionPtr version;
  42
  43     info.value = (unsigned long)&target;
  44
  45     /* We do things in a specific order here.
  46      *
  47      * DRM version first. We need to be sure we're running on a KMS chipset.
  48      * This is also for some features.
  49      *
  50      * Then, the PCI ID. This is essential and should return usable numbers
  51      * for all Radeons. If this fails, we probably got handed an FD for some
  52      * non-Radeon card.
  53      *
  54      * The GB and Z pipe requests should always succeed, but they might not
  55      * return sensical values for all chipsets, but that's alright because
  56      * the pipe drivers already know that.
  57      *
  58      * The GEM info is actually bogus on the kernel side, as well as our side
  59      * (see radeon_gem_info_ioctl in radeon_gem.c) but that's alright because
  60      * we don't actually use the info for anything yet. */
  61
  62     version = drmGetVersion(fd);
  63     if (version->version_major != 2) {
  64         fprintf(stderr, "%s: DRM version is %d.%d.%d but this driver is "
  65                 "only compatible with 2.x.x\n", __FUNCTION__,
  66                 version->version_major, version->version_minor,
  67                 version->version_patchlevel);
  68         drmFreeVersion(version);
  69         exit(1);
  70     }
  71
  72     info.request = RADEON_INFO_DEVICE_ID;
  73     retval = drmCommandWriteRead(fd, DRM_RADEON_INFO, &info, sizeof(info));
  74     if (retval) {
  75         fprintf(stderr, "%s: Failed to get PCI ID, "
  76                 "error number %d\n", __FUNCTION__, retval);
  77         exit(1);
  78     }
  79     winsys->pci_id = target;
  80
  81     info.request = RADEON_INFO_NUM_GB_PIPES;
  82     retval = drmCommandWriteRead(fd, DRM_RADEON_INFO, &info, sizeof(info));
  83     if (retval) {
  84         fprintf(stderr, "%s: Failed to get GB pipe count, "
  85                 "error number %d\n", __FUNCTION__, retval);
  86         exit(1);
  87     }
  88     winsys->gb_pipes = target;
  89
  90     info.request = RADEON_INFO_NUM_Z_PIPES;
  91     retval = drmCommandWriteRead(fd, DRM_RADEON_INFO, &info, sizeof(info));
  92     if (retval) {
  93         fprintf(stderr, "%s: Failed to get Z pipe count, "
  94                 "error number %d\n", __FUNCTION__, retval);
  95         exit(1);
  96     }
  97     winsys->z_pipes = target;
  98
  99     retval = drmCommandWriteRead(fd, DRM_RADEON_GEM_INFO,
 100             &gem_info, sizeof(gem_info));
 101     if (retval) {
 102         fprintf(stderr, "%s: Failed to get MM info, error number %d\n",
 103                 __FUNCTION__, retval);
 104         exit(1);
 105     }
 106     winsys->gart_size = gem_info.gart_size;
 107     winsys->vram_size = gem_info.vram_size;
 108
 109     debug_printf("radeon: Successfully grabbed chipset info from kernel!\n"
 110                  "radeon: DRM version: %d.%d.%d ID: 0x%04x GB: %d Z: %d\n"
 111                  "radeon: GART size: %d MB VRAM size: %d MB\n",
 112                  version->version_major, version->version_minor,
 113                  version->version_patchlevel, winsys->pci_id,
 114                  winsys->gb_pipes, winsys->z_pipes,
 115                  winsys->gart_size / 1024 / 1024,
 116                  winsys->vram_size / 1024 / 1024);
 117
 118     drmFreeVersion(version);
 119 }
 120
 121 /* Create a pipe_screen. */
 122 struct pipe_screen* radeon_create_screen(struct drm_api* api,
 123                                          int drmFB,
 124                                          struct drm_create_screen_arg *arg)
 125 {
 126     struct radeon_winsys* rwinsys = radeon_pipe_winsys(drmFB);
 127     do_ioctls(drmFB, rwinsys);
 128
 129     /* The state tracker can organize a softpipe fallback if no hw
 130      * driver is found.
 131      */
 132     if (is_r3xx(rwinsys->pci_id)) {
 133         radeon_setup_winsys(drmFB, rwinsys);
 134         return r300_create_screen(rwinsys);
 135     }
 136 }
 137
 138
 139 boolean radeon_buffer_from_texture(struct drm_api* api,
 140                                    struct pipe_screen* screen,
 141                                    struct pipe_texture* texture,
 142                                    struct pipe_buffer** buffer,
 143                                    unsigned* stride)
 144 {
 145     /* XXX fix this */
 146     return r300_get_texture_buffer(screen, texture, buffer, stride);
 147 }
 148
 149 /* Create a buffer from a handle. */
 150 /* XXX what's up with name? */
 151 struct pipe_buffer* radeon_buffer_from_handle(struct drm_api* api,
 152                                               struct pipe_screen* screen,
 153                                               const char* name,
 154                                               unsigned handle)
 155 {
 156     struct radeon_bo_manager* bom =
 157         ((struct radeon_winsys*)screen->winsys)->priv->bom;
 158     struct radeon_pipe_buffer* radeon_buffer;
 159     struct radeon_bo* bo = NULL;
 160
 161     bo = radeon_bo_open(bom, handle, 0, 0, 0, 0);
 162     if (bo == NULL) {
 163         return NULL;
 164     }
 165
 166     radeon_buffer = CALLOC_STRUCT(radeon_pipe_buffer);
 167     if (radeon_buffer == NULL) {
 168         radeon_bo_unref(bo);
 169         return NULL;
 170     }
 171
 172     pipe_reference_init(&radeon_buffer->base.reference, 1);
 173     radeon_buffer->base.screen = screen;
 174     radeon_buffer->base.usage = PIPE_BUFFER_USAGE_PIXEL;
 175     radeon_buffer->bo = bo;
 176     return &radeon_buffer->base;
 177 }
 178
 179 static struct pipe_texture*
 180 radeon_texture_from_shared_handle(struct drm_api *api,
 181                                   struct pipe_screen *screen,
 182                                   struct pipe_texture *templ,
 183                                   const char *name,
 184                                   unsigned stride,
 185                                   unsigned handle)
 186 {
 187     struct pipe_buffer *buffer;
 188     struct pipe_texture *blanket;
 189
 190     buffer = radeon_buffer_from_handle(api, screen, name, handle);
 191     if (!buffer) {
 192         return NULL;
 193     }
 194
 195     blanket = screen->texture_blanket(screen, templ, &stride, buffer);
 196
 197     pipe_buffer_reference(&buffer, NULL);
 198
 199     return blanket;
 200 }
 201
 202 static boolean radeon_shared_handle_from_texture(struct drm_api *api,
 203                                                  struct pipe_screen *screen,
 204                                                  struct pipe_texture *texture,
 205                                                  unsigned *stride,
 206                                                  unsigned *handle)
 207 {
 208     int retval, fd;
 209     struct drm_gem_flink flink;
 210     struct radeon_pipe_buffer* radeon_buffer;
 211     struct pipe_buffer *buffer = NULL;
 212
 213     if (!radeon_buffer_from_texture(api, screen, texture, &buffer, stride)) {
 214         return FALSE;
 215     }
 216
 217     radeon_buffer = (struct radeon_pipe_buffer*)buffer;
 218     if (!radeon_buffer->flinked) {
 219         fd = ((struct radeon_winsys*)screen->winsys)->priv->fd;
 220
 221         flink.handle = radeon_buffer->bo->handle;
 222
 223         retval = ioctl(fd, DRM_IOCTL_GEM_FLINK, &flink);
 224         if (retval) {
 225             debug_printf("radeon: DRM_IOCTL_GEM_FLINK failed, error %d\n",
 226                     retval);
 227             return FALSE;
 228         }
 229
 230         radeon_buffer->flink = flink.name;
 231         radeon_buffer->flinked = TRUE;
 232     }
 233
 234     *handle = radeon_buffer->flink;
 235     return TRUE;
 236 }
 237
 238 static boolean radeon_local_handle_from_texture(struct drm_api *api,
 239                                                 struct pipe_screen *screen,
 240                                                 struct pipe_texture *texture,
 241                                                 unsigned *stride,
 242                                                 unsigned *handle)
 243 {
 244     struct pipe_buffer *buffer = NULL;
 245     if (!radeon_buffer_from_texture(api, screen, texture, &buffer, stride)) {
 246         return FALSE;
 247     }
 248
 249     *handle = ((struct radeon_pipe_buffer*)buffer)->bo->handle;
 250
 251     pipe_buffer_reference(&buffer, NULL);
 252
 253     return TRUE;
 254 }
 255
 256 struct drm_api drm_api_hooks = {
 257     .name = "radeon",
 258     .driver_name = "radeon",
 259     .create_screen = radeon_create_screen,
 260     .texture_from_shared_handle = radeon_texture_from_shared_handle,
 261     .shared_handle_from_texture = radeon_shared_handle_from_texture,
 262     .local_handle_from_texture = radeon_local_handle_from_texture,
 263 };
 264
 265 struct drm_api* drm_api_create()
 266 {
 267 #ifdef DEBUG
 268     return trace_drm_create(&drm_api_hooks);
 269 #else
 270     return &drm_api_hooks;
 271 #endif
 272 }