libkms/dumb.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 struct dumb_bo
  40 {
  41         struct kms_bo base;
  42         unsigned map_count;
  43 };
  44
  45 static int
  46 dumb_get_prop(struct kms_driver *kms, unsigned key, unsigned *out)
  47 {
  48         switch (key) {
  49         case KMS_BO_TYPE:
  50                 *out = KMS_BO_TYPE_SCANOUT_X8R8G8B8 | KMS_BO_TYPE_CURSOR_64X64_A8R8G8B8;
  51                 break;
  52         default:
  53                 return -EINVAL;
  54         }
  55         return 0;
  56 }
  57
  58 static int
  59 dumb_destroy(struct kms_driver *kms)
  60 {
  61         free(kms);
  62         return 0;
  63 }
  64
  65 static int
  66 dumb_bo_create(struct kms_driver *kms,
  67                  const unsigned width, const unsigned height,
  68                  const enum kms_bo_type type, const unsigned *attr,
  69                  struct kms_bo **out)
  70 {
  71         struct drm_mode_create_dumb arg;
  72         struct dumb_bo *bo;
  73         int i, ret;
  74
  75         for (i = 0; attr[i]; i += 2) {
  76                 switch (attr[i]) {
  77                 case KMS_WIDTH:
  78                 case KMS_HEIGHT:
  79                         break;
  80                 case KMS_BO_TYPE:
  81                         break;
  82                 default:
  83                         return -EINVAL;
  84                 }
  85         }
  86
  87         bo = calloc(1, sizeof(*bo));
  88         if (!bo)
  89                 return -ENOMEM;
  90
  91         memset(&arg, 0, sizeof(arg));
  92
  93         /* All BO_TYPE currently are 32bpp formats */
  94         arg.bpp = 32;
  95         arg.width = width;
  96         arg.height = height;
  97
  98         ret = drmIoctl(kms->fd, DRM_IOCTL_MODE_CREATE_DUMB, &arg);
  99         if (ret)
 100                 goto err_free;
 101
 102         bo->base.kms = kms;
 103         bo->base.handle = arg.handle;
 104         bo->base.size = arg.size;
 105         bo->base.pitch = arg.pitch;
 106
 107         *out = &bo->base;
 108
 109         return 0;
 110
 111 err_free:
 112         free(bo);
 113         return ret;
 114 }
 115
 116 static int
 117 dumb_bo_get_prop(struct kms_bo *bo, unsigned key, unsigned *out)
 118 {
 119         switch (key) {
 120         default:
 121                 return -EINVAL;
 122         }
 123 }
 124
 125 static int
 126 dumb_bo_map(struct kms_bo *_bo, void **out)
 127 {
 128         struct dumb_bo *bo = (struct dumb_bo *)_bo;
 129         struct drm_mode_map_dumb arg;
 130         void *map = NULL;
 131         int ret;
 132
 133         if (bo->base.ptr) {
 134                 bo->map_count++;
 135                 *out = bo->base.ptr;
 136                 return 0;
 137         }
 138
 139         memset(&arg, 0, sizeof(arg));
 140         arg.handle = bo->base.handle;
 141
 142         ret = drmIoctl(bo->base.kms->fd, DRM_IOCTL_MODE_MAP_DUMB, &arg);
 143         if (ret)
 144                 return ret;
 145
 146         map = drm_mmap(0, bo->base.size, PROT_READ | PROT_WRITE, MAP_SHARED, bo->base.kms->fd, arg.offset);
 147         if (map == MAP_FAILED)
 148                 return -errno;
 149
 150         bo->base.ptr = map;
 151         bo->map_count++;
 152         *out = bo->base.ptr;
 153
 154         return 0;
 155 }
 156
 157 static int
 158 dumb_bo_unmap(struct kms_bo *_bo)
 159 {
 160         struct dumb_bo *bo = (struct dumb_bo *)_bo;
 161         bo->map_count--;
 162         return 0;
 163 }
 164
 165 static int
 166 dumb_bo_destroy(struct kms_bo *_bo)
 167 {
 168         struct dumb_bo *bo = (struct dumb_bo *)_bo;
 169         struct drm_mode_destroy_dumb arg;
 170         int ret;
 171
 172         if (bo->base.ptr) {
 173                 /* XXX Sanity check map_count */
 174                 drm_munmap(bo->base.ptr, bo->base.size);
 175                 bo->base.ptr = NULL;
 176         }
 177
 178         memset(&arg, 0, sizeof(arg));
 179         arg.handle = bo->base.handle;
 180
 181         ret = drmIoctl(bo->base.kms->fd, DRM_IOCTL_MODE_DESTROY_DUMB, &arg);
 182         if (ret)
 183                 return -errno;
 184
 185         free(bo);
 186         return 0;
 187 }
 188
 189 drm_private int
 190 dumb_create(int fd, struct kms_driver **out)
 191 {
 192         struct kms_driver *kms;
 193         int ret;
 194         uint64_t cap = 0;
 195
 196         ret = drmGetCap(fd, DRM_CAP_DUMB_BUFFER, &cap);
 197         if (ret || cap == 0)
 198                 return -EINVAL;
 199
 200         kms = calloc(1, sizeof(*kms));
 201         if (!kms)
 202                 return -ENOMEM;
 203
 204         kms->fd = fd;
 205
 206         kms->bo_create = dumb_bo_create;
 207         kms->bo_map = dumb_bo_map;
 208         kms->bo_unmap = dumb_bo_unmap;
 209         kms->bo_get_prop = dumb_bo_get_prop;
 210         kms->bo_destroy = dumb_bo_destroy;
 211         kms->get_prop = dumb_get_prop;
 212         kms->destroy = dumb_destroy;
 213         *out = kms;
 214
 215         return 0;
 216 }