libkms/vmwgfx.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 #define HAVE_STDINT_H
  30 #define _FILE_OFFSET_BITS 64
  31
  32 #include <errno.h>
  33 #include <stdlib.h>
  34 #include <string.h>
  35 #include "internal.h"
  36
  37 #include <sys/mman.h>
  38 #include "xf86drm.h"
  39 #include "vmwgfx_drm.h"
  40
  41 struct vmwgfx_bo
  42 {
  43         struct kms_bo base;
  44         uint64_t map_handle;
  45         unsigned map_count;
  46 };
  47
  48 static int
  49 vmwgfx_get_prop(struct kms_driver *kms, unsigned key, unsigned *out)
  50 {
  51         switch (key) {
  52         case KMS_MAX_SCANOUT_WIDTH:
  53                 *out = 2048;
  54                 break;
  55         case KMS_MAX_SCANOUT_HEIGHT:
  56                 *out = 2048;
  57                 break;
  58         case KMS_MIN_SCANOUT_WIDTH:
  59                 *out = 1;
  60                 break;
  61         case KMS_MIN_SCANOUT_HEIGHT:
  62                 *out = 1;
  63                 break;
  64         case KMS_MAX_CURSOR_WIDTH:
  65                 *out = 64;
  66                 break;
  67         case KMS_MAX_CURSOR_HEIGHT:
  68                 *out = 64;
  69                 break;
  70         case KMS_MIN_CURSOR_WIDTH:
  71                 *out = 64;
  72                 break;
  73         case KMS_MIN_CURSOR_HEIGHT:
  74                 *out = 64;
  75                 break;
  76         default:
  77                 return -EINVAL;
  78         }
  79         return 0;
  80 }
  81
  82 static int
  83 vmwgfx_destroy(struct kms_driver *kms)
  84 {
  85         free(kms);
  86         return 0;
  87 }
  88
  89 static int
  90 vmwgfx_bo_create(struct kms_driver *kms,
  91                  const unsigned width, const unsigned height,
  92                  const enum kms_bo_type type, const unsigned *attr,
  93                  struct kms_bo **out)
  94 {
  95         struct vmwgfx_bo *bo;
  96         int i, ret;
  97
  98         for (i = 0; attr[i]; i += 2) {
  99                 switch (attr[i]) {
 100                 case KMS_WIDTH:
 101                 case KMS_HEIGHT:
 102                 case KMS_BO_TYPE:
 103                         break;
 104                 default:
 105                         return -EINVAL;
 106                 }
 107         }
 108
 109         bo = calloc(1, sizeof(*bo));
 110         if (!bo)
 111                 return -EINVAL;
 112
 113         {
 114                 union drm_vmw_alloc_dmabuf_arg arg;
 115                 struct drm_vmw_alloc_dmabuf_req *req = &arg.req;
 116                 struct drm_vmw_dmabuf_rep *rep = &arg.rep;
 117
 118                 memset(&arg, 0, sizeof(arg));
 119                 req->size = width * height * 4;
 120                 bo->base.size = req->size;
 121                 bo->base.pitch = width * 4;
 122                 bo->base.kms = kms;
 123
 124                 do {
 125                         ret = drmCommandWriteRead(bo->base.kms->fd,
 126                                                   DRM_VMW_ALLOC_DMABUF,
 127                                                   &arg, sizeof(arg));
 128                 } while (ret == -ERESTART);
 129
 130                 if (ret)
 131                         goto err_free;
 132
 133                 bo->base.handle = rep->handle;
 134                 bo->map_handle = rep->map_handle;
 135                 bo->base.handle = rep->cur_gmr_id;
 136                 bo->base.offset = rep->cur_gmr_offset;
 137         }
 138
 139         *out = &bo->base;
 140
 141         return 0;
 142
 143 err_free:
 144         free(bo);
 145         return ret;
 146 }
 147
 148 static int
 149 vmwgfx_bo_get_prop(struct kms_bo *bo, unsigned key, unsigned *out)
 150 {
 151         switch (key) {
 152         default:
 153                 return -EINVAL;
 154         }
 155 }
 156
 157 static int
 158 vmwgfx_bo_map(struct kms_bo *_bo, void **out)
 159 {
 160         struct vmwgfx_bo *bo = (struct vmwgfx_bo *)_bo;
 161         void *map;
 162
 163         if (bo->base.ptr) {
 164                 bo->map_count++;
 165                 *out = bo->base.ptr;
 166                 return 0;
 167         }
 168
 169         map = mmap(NULL, bo->base.size, PROT_READ | PROT_WRITE, MAP_SHARED, bo->base.kms->fd, bo->map_handle);
 170         if (map == MAP_FAILED)
 171                 return -errno;
 172
 173         bo->base.ptr = map;
 174         bo->map_count++;
 175         *out = bo->base.ptr;
 176
 177         return 0;
 178 }
 179
 180 static int
 181 vmwgfx_bo_unmap(struct kms_bo *_bo)
 182 {
 183         struct vmwgfx_bo *bo = (struct vmwgfx_bo *)_bo;
 184         bo->map_count--;
 185         return 0;
 186 }
 187
 188 static int
 189 vmwgfx_bo_destroy(struct kms_bo *_bo)
 190 {
 191         struct vmwgfx_bo *bo = (struct vmwgfx_bo *)_bo;
 192         struct drm_vmw_unref_dmabuf_arg arg;
 193
 194         if (bo->base.ptr) {
 195                 /* XXX Sanity check map_count */
 196                 munmap(bo->base.ptr, bo->base.size);
 197                 bo->base.ptr = NULL;
 198         }
 199
 200         memset(&arg, 0, sizeof(arg));
 201         arg.handle = bo->base.handle;
 202         drmCommandWrite(bo->base.kms->fd, DRM_VMW_UNREF_DMABUF, &arg, sizeof(arg));
 203
 204         free(bo);
 205         return 0;
 206 }
 207
 208 int
 209 vmwgfx_create(int fd, struct kms_driver **out)
 210 {
 211         struct kms_driver *kms;
 212
 213         kms = calloc(1, sizeof(*kms));
 214         if (!kms)
 215                 return -ENOMEM;
 216
 217         kms->fd = fd;
 218
 219         kms->bo_create = vmwgfx_bo_create;
 220         kms->bo_map = vmwgfx_bo_map;
 221         kms->bo_unmap = vmwgfx_bo_unmap;
 222         kms->bo_get_prop = vmwgfx_bo_get_prop;
 223         kms->bo_destroy = vmwgfx_bo_destroy;
 224         kms->get_prop = vmwgfx_get_prop;
 225         kms->destroy = vmwgfx_destroy;
 226         *out = kms;
 227         return 0;
 228 }