src/gallium/winsys/svga/drm/vmw_screen.c

   1 /**********************************************************
   2  * Copyright 2009 VMware, Inc.  All rights reserved.
   3  *
   4  * Permission is hereby granted, free of charge, to any person
   5  * obtaining a copy of this software and associated documentation
   6  * files (the "Software"), to deal in the Software without
   7  * restriction, including without limitation the rights to use, copy,
   8  * modify, merge, publish, distribute, sublicense, and/or sell copies
   9  * of the Software, and to permit persons to whom the Software is
  10  * furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice shall be
  13  * included in all copies or substantial portions of the Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  16  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  17  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  18  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  19  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  20  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  21  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  22  * SOFTWARE.
  23  *
  24  **********************************************************/
  25
  26
  27 #include "vmw_screen.h"
  28 #include "vmw_fence.h"
  29 #include "vmw_context.h"
  30
  31 #include "util/u_memory.h"
  32 #include "pipe/p_compiler.h"
  33 #include "util/u_hash_table.h"
  34 #include <sys/types.h>
  35 #include <sys/stat.h>
  36 #include <unistd.h>
  37
  38 static struct util_hash_table *dev_hash = NULL;
  39
  40 static int vmw_dev_compare(void *key1, void *key2)
  41 {
  42    return (major(*(dev_t *)key1) == major(*(dev_t *)key2) &&
  43            minor(*(dev_t *)key1) == minor(*(dev_t *)key2)) ? 0 : 1;
  44 }
  45
  46 static unsigned vmw_dev_hash(void *key)
  47 {
  48    return (major(*(dev_t *) key) << 16) | minor(*(dev_t *) key);
  49 }
  50
  51 /* Called from vmw_drm_create_screen(), creates and initializes the
  52  * vmw_winsys_screen structure, which is the main entity in this
  53  * module.
  54  * First, check whether a vmw_winsys_screen object already exists for
  55  * this device, and in that case return that one, making sure that we
  56  * have our own file descriptor open to DRM.
  57  */
  58
  59 struct vmw_winsys_screen *
  60 vmw_winsys_create( int fd, boolean use_old_scanout_flag )
  61 {
  62    struct vmw_winsys_screen *vws;
  63    struct stat stat_buf;
  64
  65    if (dev_hash == NULL) {
  66       dev_hash = util_hash_table_create(vmw_dev_hash, vmw_dev_compare);
  67       if (dev_hash == NULL)
  68          return NULL;
  69    }
  70
  71    if (fstat(fd, &stat_buf))
  72       return NULL;
  73
  74    vws = util_hash_table_get(dev_hash, &stat_buf.st_rdev);
  75    if (vws) {
  76       vws->open_count++;
  77       return vws;
  78    }
  79
  80    vws = CALLOC_STRUCT(vmw_winsys_screen);
  81    if (!vws)
  82       goto out_no_vws;
  83
  84    vws->device = stat_buf.st_rdev;
  85    vws->open_count = 1;
  86    vws->ioctl.drm_fd = dup(fd);
  87    vws->use_old_scanout_flag = use_old_scanout_flag;
  88    vws->base.have_gb_dma = TRUE;
  89
  90    if (!vmw_ioctl_init(vws))
  91       goto out_no_ioctl;
  92
  93    vws->fence_ops = vmw_fence_ops_create(vws);
  94    if (!vws->fence_ops)
  95       goto out_no_fence_ops;
  96
  97    if(!vmw_pools_init(vws))
  98       goto out_no_pools;
  99
 100    if (!vmw_winsys_screen_init_svga(vws))
 101       goto out_no_svga;
 102
 103    if (util_hash_table_set(dev_hash, &vws->device, vws) != PIPE_OK)
 104       goto out_no_hash_insert;
 105
 106    return vws;
 107 out_no_hash_insert:
 108 out_no_svga:
 109    vmw_pools_cleanup(vws);
 110 out_no_pools:
 111    vws->fence_ops->destroy(vws->fence_ops);
 112 out_no_fence_ops:
 113    vmw_ioctl_cleanup(vws);
 114 out_no_ioctl:
 115    close(vws->ioctl.drm_fd);
 116    FREE(vws);
 117 out_no_vws:
 118    return NULL;
 119 }
 120
 121 void
 122 vmw_winsys_destroy(struct vmw_winsys_screen *vws)
 123 {
 124    if (--vws->open_count == 0) {
 125       util_hash_table_remove(dev_hash, &vws->device);
 126       vmw_pools_cleanup(vws);
 127       vws->fence_ops->destroy(vws->fence_ops);
 128       vmw_ioctl_cleanup(vws);
 129       close(vws->ioctl.drm_fd);
 130       FREE(vws);
 131    }
 132 }