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

   1 /**********************************************************
   2  * Copyright 2009-2015 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 #ifdef MAJOR_IN_MKDEV
  35 #include <sys/mkdev.h>
  36 #endif
  37 #ifdef MAJOR_IN_SYSMACROS
  38 #include <sys/sysmacros.h>
  39 #endif
  40 #include <sys/stat.h>
  41 #include <unistd.h>
  42 #include <fcntl.h>
  43
  44 static struct util_hash_table *dev_hash = NULL;
  45
  46 static int vmw_dev_compare(void *key1, void *key2)
  47 {
  48    return (major(*(dev_t *)key1) == major(*(dev_t *)key2) &&
  49            minor(*(dev_t *)key1) == minor(*(dev_t *)key2)) ? 0 : 1;
  50 }
  51
  52 static unsigned vmw_dev_hash(void *key)
  53 {
  54    return (major(*(dev_t *) key) << 16) | minor(*(dev_t *) key);
  55 }
  56
  57 /* Called from vmw_drm_create_screen(), creates and initializes the
  58  * vmw_winsys_screen structure, which is the main entity in this
  59  * module.
  60  * First, check whether a vmw_winsys_screen object already exists for
  61  * this device, and in that case return that one, making sure that we
  62  * have our own file descriptor open to DRM.
  63  */
  64
  65 struct vmw_winsys_screen *
  66 vmw_winsys_create( int fd )
  67 {
  68    struct vmw_winsys_screen *vws;
  69    struct stat stat_buf;
  70
  71    if (dev_hash == NULL) {
  72       dev_hash = util_hash_table_create(vmw_dev_hash, vmw_dev_compare);
  73       if (dev_hash == NULL)
  74          return NULL;
  75    }
  76
  77    if (fstat(fd, &stat_buf))
  78       return NULL;
  79
  80    vws = util_hash_table_get(dev_hash, &stat_buf.st_rdev);
  81    if (vws) {
  82       vws->open_count++;
  83       return vws;
  84    }
  85
  86    vws = CALLOC_STRUCT(vmw_winsys_screen);
  87    if (!vws)
  88       goto out_no_vws;
  89
  90    vws->device = stat_buf.st_rdev;
  91    vws->open_count = 1;
  92    vws->ioctl.drm_fd = fcntl(fd, F_DUPFD_CLOEXEC, 3);
  93    vws->base.have_gb_dma = TRUE;
  94    vws->base.need_to_rebind_resources = FALSE;
  95
  96    if (!vmw_ioctl_init(vws))
  97       goto out_no_ioctl;
  98
  99    vws->fence_ops = vmw_fence_ops_create(vws);
 100    if (!vws->fence_ops)
 101       goto out_no_fence_ops;
 102
 103    if(!vmw_pools_init(vws))
 104       goto out_no_pools;
 105
 106    if (!vmw_winsys_screen_init_svga(vws))
 107       goto out_no_svga;
 108
 109    if (util_hash_table_set(dev_hash, &vws->device, vws) != PIPE_OK)
 110       goto out_no_hash_insert;
 111
 112    return vws;
 113 out_no_hash_insert:
 114 out_no_svga:
 115    vmw_pools_cleanup(vws);
 116 out_no_pools:
 117    vws->fence_ops->destroy(vws->fence_ops);
 118 out_no_fence_ops:
 119    vmw_ioctl_cleanup(vws);
 120 out_no_ioctl:
 121    close(vws->ioctl.drm_fd);
 122    FREE(vws);
 123 out_no_vws:
 124    return NULL;
 125 }
 126
 127 void
 128 vmw_winsys_destroy(struct vmw_winsys_screen *vws)
 129 {
 130    if (--vws->open_count == 0) {
 131       util_hash_table_remove(dev_hash, &vws->device);
 132       vmw_pools_cleanup(vws);
 133       vws->fence_ops->destroy(vws->fence_ops);
 134       vmw_ioctl_cleanup(vws);
 135       close(vws->ioctl.drm_fd);
 136       FREE(vws);
 137    }
 138 }