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 #include "radeon_r300.h"
  34 #include "radeon_buffer.h"
  35
  36 #include "r300_winsys.h"
  37 #include "trace/tr_drm.h"
  38
  39 #include "util/u_memory.h"
  40
  41 #include "xf86drm.h"
  42 #include <sys/ioctl.h>
  43
  44 static struct radeon_libdrm_winsys *
  45 radeon_winsys_create(int fd)
  46 {
  47     struct radeon_libdrm_winsys *rws;
  48
  49     rws = CALLOC_STRUCT(radeon_libdrm_winsys);
  50     if (rws == NULL) {
  51         return NULL;
  52     }
  53
  54     rws->fd = fd;
  55     return rws;
  56 }
  57
  58 /* Helper function to do the ioctls needed for setup and init. */
  59 static void do_ioctls(int fd, struct radeon_libdrm_winsys* winsys)
  60 {
  61     struct drm_radeon_gem_info gem_info = {0};
  62     struct drm_radeon_info info = {0};
  63     int target = 0;
  64     int retval;
  65     drmVersionPtr version;
  66
  67     info.value = (unsigned long)&target;
  68
  69     /* We do things in a specific order here.
  70      *
  71      * DRM version first. We need to be sure we're running on a KMS chipset.
  72      * This is also for some features.
  73      *
  74      * Then, the PCI ID. This is essential and should return usable numbers
  75      * for all Radeons. If this fails, we probably got handed an FD for some
  76      * non-Radeon card.
  77      *
  78      * The GB and Z pipe requests should always succeed, but they might not
  79      * return sensical values for all chipsets, but that's alright because
  80      * the pipe drivers already know that.
  81      *
  82      * The GEM info is actually bogus on the kernel side, as well as our side
  83      * (see radeon_gem_info_ioctl in radeon_gem.c) but that's alright because
  84      * we don't actually use the info for anything yet. */
  85
  86     version = drmGetVersion(fd);
  87     if (version->version_major != 2) {
  88         fprintf(stderr, "%s: DRM version is %d.%d.%d but this driver is "
  89                 "only compatible with 2.x.x\n", __FUNCTION__,
  90                 version->version_major, version->version_minor,
  91                 version->version_patchlevel);
  92         drmFreeVersion(version);
  93         exit(1);
  94     }
  95
  96     info.request = RADEON_INFO_DEVICE_ID;
  97     retval = drmCommandWriteRead(fd, DRM_RADEON_INFO, &info, sizeof(info));
  98     if (retval) {
  99         fprintf(stderr, "%s: Failed to get PCI ID, "
 100                 "error number %d\n", __FUNCTION__, retval);
 101         exit(1);
 102     }
 103     winsys->pci_id = target;
 104
 105     info.request = RADEON_INFO_NUM_GB_PIPES;
 106     retval = drmCommandWriteRead(fd, DRM_RADEON_INFO, &info, sizeof(info));
 107     if (retval) {
 108         fprintf(stderr, "%s: Failed to get GB pipe count, "
 109                 "error number %d\n", __FUNCTION__, retval);
 110         exit(1);
 111     }
 112     winsys->gb_pipes = target;
 113
 114     info.request = RADEON_INFO_NUM_Z_PIPES;
 115     retval = drmCommandWriteRead(fd, DRM_RADEON_INFO, &info, sizeof(info));
 116     if (retval) {
 117         fprintf(stderr, "%s: Failed to get Z pipe count, "
 118                 "error number %d\n", __FUNCTION__, retval);
 119         exit(1);
 120     }
 121     winsys->z_pipes = target;
 122
 123     retval = drmCommandWriteRead(fd, DRM_RADEON_GEM_INFO,
 124             &gem_info, sizeof(gem_info));
 125     if (retval) {
 126         fprintf(stderr, "%s: Failed to get MM info, error number %d\n",
 127                 __FUNCTION__, retval);
 128         exit(1);
 129     }
 130     winsys->gart_size = gem_info.gart_size;
 131     winsys->vram_size = gem_info.vram_size;
 132
 133     debug_printf("radeon: Successfully grabbed chipset info from kernel!\n"
 134                  "radeon: DRM version: %d.%d.%d ID: 0x%04x GB: %d Z: %d\n"
 135                  "radeon: GART size: %d MB VRAM size: %d MB\n",
 136                  version->version_major, version->version_minor,
 137                  version->version_patchlevel, winsys->pci_id,
 138                  winsys->gb_pipes, winsys->z_pipes,
 139                  winsys->gart_size / 1024 / 1024,
 140                  winsys->vram_size / 1024 / 1024);
 141
 142     drmFreeVersion(version);
 143 }
 144
 145 /* Create a pipe_screen. */
 146 struct pipe_screen* radeon_create_screen(struct drm_api* api,
 147                                          int drmFB,
 148                                          struct drm_create_screen_arg *arg)
 149 {
 150     struct radeon_libdrm_winsys* rws;
 151     boolean ret;
 152
 153     rws = radeon_winsys_create(drmFB);
 154     if (!rws)
 155         return NULL;
 156
 157     do_ioctls(drmFB, rws);
 158
 159     /* The state tracker can organize a softpipe fallback if no hw
 160      * driver is found.
 161      */
 162     if (is_r3xx(rws->pci_id)) {
 163         ret = radeon_setup_winsys(drmFB, rws);
 164         if (ret == FALSE)
 165             goto fail;
 166         return r300_create_screen(&rws->base);
 167     }
 168
 169 fail:
 170     FREE(rws);
 171     return NULL;
 172 }
 173
 174 static void radeon_drm_api_destroy(struct drm_api *api)
 175 {
 176     return;
 177 }
 178
 179 struct drm_api drm_api_hooks = {
 180     .name = "radeon",
 181     .driver_name = "radeon",
 182     .create_screen = radeon_create_screen,
 183     .destroy = radeon_drm_api_destroy,
 184 };
 185
 186 struct drm_api* drm_api_create()
 187 {
 188 #ifdef DEBUG
 189     return trace_drm_create(&drm_api_hooks);
 190 #else
 191     return &drm_api_hooks;
 192 #endif
 193 }