libkms/radeon.c

   1 /**************************************************************************
   2  *
   3  * Copyright © 2009 VMware, Inc., Palo Alto, CA., USA
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  19  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
  21  * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
  22  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  23  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  24  * USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28
  29 #include <errno.h>
  30 #include <stdio.h>
  31 #include <stdlib.h>
  32 #include <string.h>
  33 #include "internal.h"
  34
  35 #include <sys/ioctl.h>
  36 #include "xf86drm.h"
  37 #include "libdrm_macros.h"
  38
  39 #include "radeon_drm.h"
  40
  41
  42 #define ALIGNMENT 512
  43
  44 struct radeon_bo
  45 {
  46         struct kms_bo base;
  47         unsigned map_count;
  48 };
  49
  50 static int
  51 radeon_get_prop(struct kms_driver *kms, unsigned key, unsigned *out)
  52 {
  53         switch (key) {
  54         case KMS_BO_TYPE:
  55                 *out = KMS_BO_TYPE_SCANOUT_X8R8G8B8 | KMS_BO_TYPE_CURSOR_64X64_A8R8G8B8;
  56                 break;
  57         default:
  58                 return -EINVAL;
  59         }
  60         return 0;
  61 }
  62
  63 static int
  64 radeon_destroy(struct kms_driver *kms)
  65 {
  66         free(kms);
  67         return 0;
  68 }
  69
  70 static int
  71 radeon_bo_create(struct kms_driver *kms,
  72                  const unsigned width, const unsigned height,
  73                  const enum kms_bo_type type, const unsigned *attr,
  74                  struct kms_bo **out)
  75 {
  76         struct drm_radeon_gem_create arg;
  77         unsigned size, pitch;
  78         struct radeon_bo *bo;
  79         int i, ret;
  80
  81         for (i = 0; attr[i]; i += 2) {
  82                 switch (attr[i]) {
  83                 case KMS_WIDTH:
  84                 case KMS_HEIGHT:
  85                 case KMS_BO_TYPE:
  86                         break;
  87                 default:
  88                         return -EINVAL;
  89                 }
  90         }
  91
  92         switch (type) {
  93         case KMS_BO_TYPE_CURSOR_64X64_A8R8G8B8:
  94                 pitch = 4 * 64;
  95                 size  = 4 * 64 * 64;
  96                 break;
  97         case KMS_BO_TYPE_SCANOUT_X8R8G8B8:
  98                 pitch = width * 4;
  99                 pitch = (pitch + ALIGNMENT - 1) & ~(ALIGNMENT - 1);
 100                 size  = pitch * height;
 101                 break;
 102         default:
 103                 return -EINVAL;
 104         }
 105
 106         bo = calloc(1, sizeof(*bo));
 107         if (!bo)
 108                 return -ENOMEM;
 109
 110         memset(&arg, 0, sizeof(arg));
 111         arg.size = size;
 112         arg.alignment = ALIGNMENT;
 113         arg.initial_domain = RADEON_GEM_DOMAIN_CPU;
 114         arg.flags = 0;
 115         arg.handle = 0;
 116
 117         ret = drmCommandWriteRead(kms->fd, DRM_RADEON_GEM_CREATE,
 118                                   &arg, sizeof(arg));
 119         if (ret)
 120                 goto err_free;
 121
 122         bo->base.kms = kms;
 123         bo->base.handle = arg.handle;
 124         bo->base.size = size;
 125         bo->base.pitch = pitch;
 126         bo->base.offset = 0;
 127         bo->map_count = 0;
 128
 129         *out = &bo->base;
 130
 131         return 0;
 132
 133 err_free:
 134         free(bo);
 135         return ret;
 136 }
 137
 138 static int
 139 radeon_bo_get_prop(struct kms_bo *bo, unsigned key, unsigned *out)
 140 {
 141         switch (key) {
 142         default:
 143                 return -EINVAL;
 144         }
 145 }
 146
 147 static int
 148 radeon_bo_map(struct kms_bo *_bo, void **out)
 149 {
 150         struct radeon_bo *bo = (struct radeon_bo *)_bo;
 151         struct drm_radeon_gem_mmap arg;
 152         void *map = NULL;
 153         int ret;
 154
 155         if (bo->base.ptr) {
 156                 bo->map_count++;
 157                 *out = bo->base.ptr;
 158                 return 0;
 159         }
 160
 161         memset(&arg, 0, sizeof(arg));
 162         arg.handle = bo->base.handle;
 163         arg.offset = bo->base.offset;
 164         arg.size = (uint64_t)bo->base.size;
 165
 166         ret = drmCommandWriteRead(bo->base.kms->fd, DRM_RADEON_GEM_MMAP,
 167                                 &arg, sizeof(arg));
 168         if (ret)
 169                 return -errno;
 170
 171         map = drm_mmap(0, arg.size, PROT_READ | PROT_WRITE, MAP_SHARED,
 172                    bo->base.kms->fd, arg.addr_ptr);
 173         if (map == MAP_FAILED)
 174                 return -errno;
 175
 176         bo->base.ptr = map;
 177         bo->map_count++;
 178         *out = bo->base.ptr;
 179
 180         return 0;
 181 }
 182
 183 static int
 184 radeon_bo_unmap(struct kms_bo *_bo)
 185 {
 186         struct radeon_bo *bo = (struct radeon_bo *)_bo;
 187         if (--bo->map_count == 0) {
 188                 drm_munmap(bo->base.ptr, bo->base.size);
 189                 bo->base.ptr = NULL;
 190         }
 191         return 0;
 192 }
 193
 194 static int
 195 radeon_bo_destroy(struct kms_bo *_bo)
 196 {
 197         struct radeon_bo *bo = (struct radeon_bo *)_bo;
 198         struct drm_gem_close arg;
 199         int ret;
 200
 201         if (bo->base.ptr) {
 202                 /* XXX Sanity check map_count */
 203                 drm_munmap(bo->base.ptr, bo->base.size);
 204                 bo->base.ptr = NULL;
 205         }
 206
 207         memset(&arg, 0, sizeof(arg));
 208         arg.handle = bo->base.handle;
 209
 210         ret = drmIoctl(bo->base.kms->fd, DRM_IOCTL_GEM_CLOSE, &arg);
 211         if (ret)
 212                 return -errno;
 213
 214         free(bo);
 215         return 0;
 216 }
 217
 218 drm_private int
 219 radeon_create(int fd, struct kms_driver **out)
 220 {
 221         struct kms_driver *kms;
 222
 223         kms = calloc(1, sizeof(*kms));
 224         if (!kms)
 225                 return -ENOMEM;
 226
 227         kms->fd = fd;
 228
 229         kms->bo_create = radeon_bo_create;
 230         kms->bo_map = radeon_bo_map;
 231         kms->bo_unmap = radeon_bo_unmap;
 232         kms->bo_get_prop = radeon_bo_get_prop;
 233         kms->bo_destroy = radeon_bo_destroy;
 234         kms->get_prop = radeon_get_prop;
 235         kms->destroy = radeon_destroy;
 236         *out = kms;
 237
 238         return 0;
 239 }