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 static struct radeon_libdrm_winsys *
  35 radeon_winsys_create(int fd)
  36 {
  37     struct radeon_libdrm_winsys *rws;
  38
  39     rws = CALLOC_STRUCT(radeon_libdrm_winsys);
  40     if (rws == NULL) {
  41         return NULL;
  42     }
  43
  44     rws->fd = fd;
  45     return rws;
  46 }
  47
  48 /* Helper function to do the ioctls needed for setup and init. */
  49 static void do_ioctls(int fd, struct radeon_libdrm_winsys* winsys)
  50 {
  51     struct drm_radeon_gem_info gem_info = {0};
  52     struct drm_radeon_info info = {0};
  53     int target = 0;
  54     int retval;
  55     drmVersionPtr version;
  56
  57     info.value = (unsigned long)&target;
  58
  59     /* We do things in a specific order here.
  60      *
  61      * DRM version first. We need to be sure we're running on a KMS chipset.
  62      * This is also for some features.
  63      *
  64      * Then, the PCI ID. This is essential and should return usable numbers
  65      * for all Radeons. If this fails, we probably got handed an FD for some
  66      * non-Radeon card.
  67      *
  68      * The GB and Z pipe requests should always succeed, but they might not
  69      * return sensical values for all chipsets, but that's alright because
  70      * the pipe drivers already know that.
  71      *
  72      * The GEM info is actually bogus on the kernel side, as well as our side
  73      * (see radeon_gem_info_ioctl in radeon_gem.c) but that's alright because
  74      * we don't actually use the info for anything yet. */
  75
  76     version = drmGetVersion(fd);
  77     if (version->version_major != 2) {
  78         fprintf(stderr, "%s: DRM version is %d.%d.%d but this driver is "
  79                 "only compatible with 2.x.x\n", __FUNCTION__,
  80                 version->version_major, version->version_minor,
  81                 version->version_patchlevel);
  82         drmFreeVersion(version);
  83         exit(1);
  84     }
  85
  86     info.request = RADEON_INFO_DEVICE_ID;
  87     retval = drmCommandWriteRead(fd, DRM_RADEON_INFO, &info, sizeof(info));
  88     if (retval) {
  89         fprintf(stderr, "%s: Failed to get PCI ID, "
  90                 "error number %d\n", __FUNCTION__, retval);
  91         exit(1);
  92     }
  93     winsys->pci_id = target;
  94
  95     info.request = RADEON_INFO_NUM_GB_PIPES;
  96     retval = drmCommandWriteRead(fd, DRM_RADEON_INFO, &info, sizeof(info));
  97     if (retval) {
  98         fprintf(stderr, "%s: Failed to get GB pipe count, "
  99                 "error number %d\n", __FUNCTION__, retval);
 100         exit(1);
 101     }
 102     winsys->gb_pipes = target;
 103
 104     info.request = RADEON_INFO_NUM_Z_PIPES;
 105     retval = drmCommandWriteRead(fd, DRM_RADEON_INFO, &info, sizeof(info));
 106     if (retval) {
 107         fprintf(stderr, "%s: Failed to get Z pipe count, "
 108                 "error number %d\n", __FUNCTION__, retval);
 109         exit(1);
 110     }
 111     winsys->z_pipes = target;
 112
 113     retval = drmCommandWriteRead(fd, DRM_RADEON_GEM_INFO,
 114             &gem_info, sizeof(gem_info));
 115     if (retval) {
 116         fprintf(stderr, "%s: Failed to get MM info, error number %d\n",
 117                 __FUNCTION__, retval);
 118         exit(1);
 119     }
 120     winsys->gart_size = gem_info.gart_size;
 121     winsys->vram_size = gem_info.vram_size;
 122
 123     debug_printf("radeon: Successfully grabbed chipset info from kernel!\n"
 124                  "radeon: DRM version: %d.%d.%d ID: 0x%04x GB: %d Z: %d\n"
 125                  "radeon: GART size: %d MB VRAM size: %d MB\n",
 126                  version->version_major, version->version_minor,
 127                  version->version_patchlevel, winsys->pci_id,
 128                  winsys->gb_pipes, winsys->z_pipes,
 129                  winsys->gart_size / 1024 / 1024,
 130                  winsys->vram_size / 1024 / 1024);
 131
 132     drmFreeVersion(version);
 133 }
 134
 135 /* Create a pipe_screen. */
 136 struct pipe_screen* radeon_create_screen(struct drm_api* api,
 137                                          int drmFB,
 138                                          struct drm_create_screen_arg *arg)
 139 {
 140     struct radeon_libdrm_winsys* rws;
 141
 142     rws = radeon_winsys_create(drmFB);
 143     if (!rws)
 144         return NULL;
 145
 146     do_ioctls(drmFB, rws);
 147
 148     /* The state tracker can organize a softpipe fallback if no hw
 149      * driver is found.
 150      */
 151     if (is_r3xx(rws->pci_id)) {
 152         radeon_setup_winsys(drmFB, rws);
 153         return r300_create_screen(&rws->base);
 154     } else {
 155         FREE(rws);
 156         return NULL;
 157     }
 158 }
 159
 160 static struct pipe_texture*
 161 radeon_texture_from_shared_handle(struct drm_api *api,
 162                                   struct pipe_screen *screen,
 163                                   struct pipe_texture *templ,
 164                                   const char *name,
 165                                   unsigned stride,
 166                                   unsigned handle)
 167 {
 168     struct pb_buffer *_buf;
 169     struct r300_winsys_buffer *buf;
 170     struct pipe_texture *blanket;
 171     struct radeon_libdrm_winsys *ws = radeon_winsys_screen(r300_winsys_screen(screen));
 172
 173     _buf = radeon_drm_bufmgr_create_buffer_from_handle(ws->kman, handle);
 174     if (!_buf) {
 175         return NULL;
 176     }
 177
 178     buf = radeon_libdrm_winsys_buffer(_buf);
 179     blanket = r300_texture_blanket_winsys_buffer(screen, templ, &stride, buf);
 180
 181     pb_reference(&_buf, NULL);
 182     return blanket;
 183 }
 184
 185 static boolean radeon_shared_handle_from_texture(struct drm_api *api,
 186                                                  struct pipe_screen *screen,
 187                                                  struct pipe_texture *texture,
 188                                                  unsigned *stride,
 189                                                  unsigned *handle)
 190 {
 191     struct r300_winsys_buffer *radeon_buffer;
 192     struct pb_buffer *_buf;
 193     if (!r300_get_texture_buffer(screen, texture, &radeon_buffer, stride)) {
 194         return FALSE;
 195     }
 196
 197     _buf = radeon_pb_buffer(radeon_buffer);
 198     return radeon_drm_bufmgr_shared_handle_from_buffer(_buf, handle);
 199 }
 200
 201 static boolean radeon_local_handle_from_texture(struct drm_api *api,
 202                                                 struct pipe_screen *screen,
 203                                                 struct pipe_texture *texture,
 204                                                 unsigned *stride,
 205                                                 unsigned *handle)
 206 {
 207     struct r300_winsys_buffer *radeon_buffer;
 208     struct pb_buffer *_buf;
 209
 210     if (!r300_get_texture_buffer(screen, texture, &radeon_buffer, stride)) {
 211         return FALSE;
 212     }
 213
 214     _buf = radeon_pb_buffer(radeon_buffer);
 215     *handle = radeon_drm_bufmgr_handle_from_buffer(_buf);
 216
 217     pb_reference(&_buf, NULL);
 218     return true;
 219 }
 220
 221 static void radeon_drm_api_destroy(struct drm_api *api)
 222 {
 223     return;
 224 }
 225
 226 struct drm_api drm_api_hooks = {
 227     .name = "radeon",
 228     .driver_name = "radeon",
 229     .create_screen = radeon_create_screen,
 230     .texture_from_shared_handle = radeon_texture_from_shared_handle,
 231     .shared_handle_from_texture = radeon_shared_handle_from_texture,
 232     .local_handle_from_texture = radeon_local_handle_from_texture,
 233     .destroy = radeon_drm_api_destroy,
 234 };
 235
 236 struct drm_api* drm_api_create()
 237 {
 238 #ifdef DEBUG
 239     return trace_drm_create(&drm_api_hooks);
 240 #else
 241     return &drm_api_hooks;
 242 #endif
 243 }