libkms/nouveau.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 "nouveau_drm.h"
  40
  41 struct nouveau_bo
  42 {
  43         struct kms_bo base;
  44         uint64_t map_handle;
  45         unsigned map_count;
  46 };
  47
  48 static int
  49 nouveau_get_prop(struct kms_driver *kms, unsigned key, unsigned *out)
  50 {
  51         switch (key) {
  52         case KMS_BO_TYPE:
  53                 *out = KMS_BO_TYPE_SCANOUT_X8R8G8B8 | KMS_BO_TYPE_CURSOR_64X64_A8R8G8B8;
  54                 break;
  55         default:
  56                 return -EINVAL;
  57         }
  58         return 0;
  59 }
  60
  61 static int
  62 nouveau_destroy(struct kms_driver *kms)
  63 {
  64         free(kms);
  65         return 0;
  66 }
  67
  68 static int
  69 nouveau_bo_create(struct kms_driver *kms,
  70                  const unsigned width, const unsigned height,
  71                  const enum kms_bo_type type, const unsigned *attr,
  72                  struct kms_bo **out)
  73 {
  74         struct drm_nouveau_gem_new arg;
  75         unsigned size, pitch;
  76         struct nouveau_bo *bo;
  77         int i, ret;
  78
  79         for (i = 0; attr[i]; i += 2) {
  80                 switch (attr[i]) {
  81                 case KMS_WIDTH:
  82                 case KMS_HEIGHT:
  83                 case KMS_BO_TYPE:
  84                         break;
  85                 default:
  86                         return -EINVAL;
  87                 }
  88         }
  89
  90         bo = calloc(1, sizeof(*bo));
  91         if (!bo)
  92                 return -ENOMEM;
  93
  94         if (type == KMS_BO_TYPE_CURSOR_64X64_A8R8G8B8) {
  95                 pitch = 64 * 4;
  96                 size = 64 * 64 * 4;
  97         } else if (type == KMS_BO_TYPE_SCANOUT_X8R8G8B8) {
  98                 pitch = width * 4;
  99                 pitch = (pitch + 512 - 1) & ~(512 - 1);
 100                 size = pitch * height;
 101         } else {
 102                 free(bo);
 103                 return -EINVAL;
 104         }
 105
 106         memset(&arg, 0, sizeof(arg));
 107         arg.info.size = size;
 108         arg.info.domain = NOUVEAU_GEM_DOMAIN_MAPPABLE | NOUVEAU_GEM_DOMAIN_VRAM;
 109         arg.info.tile_mode = 0;
 110         arg.info.tile_flags = 0;
 111         arg.align = 512;
 112         arg.channel_hint = 0;
 113
 114         ret = drmCommandWriteRead(kms->fd, DRM_NOUVEAU_GEM_NEW, &arg, sizeof(arg));
 115         if (ret)
 116                 goto err_free;
 117
 118         bo->base.kms = kms;
 119         bo->base.handle = arg.info.handle;
 120         bo->base.size = size;
 121         bo->base.pitch = pitch;
 122         bo->map_handle = arg.info.map_handle;
 123
 124         *out = &bo->base;
 125
 126         return 0;
 127
 128 err_free:
 129         free(bo);
 130         return ret;
 131 }
 132
 133 static int
 134 nouveau_bo_get_prop(struct kms_bo *bo, unsigned key, unsigned *out)
 135 {
 136         switch (key) {
 137         default:
 138                 return -EINVAL;
 139         }
 140 }
 141
 142 static int
 143 nouveau_bo_map(struct kms_bo *_bo, void **out)
 144 {
 145         struct nouveau_bo *bo = (struct nouveau_bo *)_bo;
 146         void *map = NULL;
 147
 148         if (bo->base.ptr) {
 149                 bo->map_count++;
 150                 *out = bo->base.ptr;
 151                 return 0;
 152         }
 153
 154         map = drm_mmap(0, bo->base.size, PROT_READ | PROT_WRITE, MAP_SHARED, bo->base.kms->fd, bo->map_handle);
 155         if (map == MAP_FAILED)
 156                 return -errno;
 157
 158         bo->base.ptr = map;
 159         bo->map_count++;
 160         *out = bo->base.ptr;
 161
 162         return 0;
 163 }
 164
 165 static int
 166 nouveau_bo_unmap(struct kms_bo *_bo)
 167 {
 168         struct nouveau_bo *bo = (struct nouveau_bo *)_bo;
 169         bo->map_count--;
 170         return 0;
 171 }
 172
 173 static int
 174 nouveau_bo_destroy(struct kms_bo *_bo)
 175 {
 176         struct nouveau_bo *bo = (struct nouveau_bo *)_bo;
 177         struct drm_gem_close arg;
 178         int ret;
 179
 180         if (bo->base.ptr) {
 181                 /* XXX Sanity check map_count */
 182                 drm_munmap(bo->base.ptr, bo->base.size);
 183                 bo->base.ptr = NULL;
 184         }
 185
 186         memset(&arg, 0, sizeof(arg));
 187         arg.handle = bo->base.handle;
 188
 189         ret = drmIoctl(bo->base.kms->fd, DRM_IOCTL_GEM_CLOSE, &arg);
 190         if (ret)
 191                 return -errno;
 192
 193         free(bo);
 194         return 0;
 195 }
 196
 197 drm_private int
 198 nouveau_create(int fd, struct kms_driver **out)
 199 {
 200         struct kms_driver *kms;
 201
 202         kms = calloc(1, sizeof(*kms));
 203         if (!kms)
 204                 return -ENOMEM;
 205
 206         kms->fd = fd;
 207
 208         kms->bo_create = nouveau_bo_create;
 209         kms->bo_map = nouveau_bo_map;
 210         kms->bo_unmap = nouveau_bo_unmap;
 211         kms->bo_get_prop = nouveau_bo_get_prop;
 212         kms->bo_destroy = nouveau_bo_destroy;
 213         kms->get_prop = nouveau_get_prop;
 214         kms->destroy = nouveau_destroy;
 215         *out = kms;
 216
 217         return 0;
 218 }