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/os_file.h"
  32 #include "util/u_memory.h"
  33 #include "pipe/p_compiler.h"
  34 #include "util/u_hash_table.h"
  35 #ifdef MAJOR_IN_MKDEV
  36 #include <sys/mkdev.h>
  37 #endif
  38 #ifdef MAJOR_IN_SYSMACROS
  39 #include <sys/sysmacros.h>
  40 #endif
  41 #include <sys/stat.h>
  42 #include <unistd.h>
  43 #include <fcntl.h>
  44
  45 static struct hash_table *dev_hash = NULL;
  46
  47 static bool vmw_dev_compare(const void *key1, const void *key2)
  48 {
  49    return (major(*(dev_t *)key1) == major(*(dev_t *)key2) &&
  50            minor(*(dev_t *)key1) == minor(*(dev_t *)key2));
  51 }
  52
  53 static uint32_t vmw_dev_hash(const void *key)
  54 {
  55    return (major(*(dev_t *) key) << 16) | minor(*(dev_t *) key);
  56 }
  57
  58 /* Called from vmw_drm_create_screen(), creates and initializes the
  59  * vmw_winsys_screen structure, which is the main entity in this
  60  * module.
  61  * First, check whether a vmw_winsys_screen object already exists for
  62  * this device, and in that case return that one, making sure that we
  63  * have our own file descriptor open to DRM.
  64  */
  65
  66 struct vmw_winsys_screen *
  67 vmw_winsys_create( int fd )
  68 {
  69    struct vmw_winsys_screen *vws;
  70    struct stat stat_buf;
  71    const char *getenv_val;
  72
  73    if (dev_hash == NULL) {
  74       dev_hash = _mesa_hash_table_create(NULL, vmw_dev_hash, vmw_dev_compare);
  75       if (dev_hash == NULL)
  76          return NULL;
  77    }
  78
  79    if (fstat(fd, &stat_buf))
  80       return NULL;
  81
  82    vws = util_hash_table_get(dev_hash, &stat_buf.st_rdev);
  83    if (vws) {
  84       vws->open_count++;
  85       return vws;
  86    }
  87
  88    vws = CALLOC_STRUCT(vmw_winsys_screen);
  89    if (!vws)
  90       goto out_no_vws;
  91
  92    vws->device = stat_buf.st_rdev;
  93    vws->open_count = 1;
  94    vws->ioctl.drm_fd = os_dupfd_cloexec(fd);
  95    vws->force_coherent = FALSE;
  96    if (!vmw_ioctl_init(vws))
  97       goto out_no_ioctl;
  98
  99    vws->base.have_gb_dma = !vws->force_coherent;
 100    vws->base.need_to_rebind_resources = FALSE;
 101    vws->base.have_transfer_from_buffer_cmd = vws->base.have_vgpu10;
 102    vws->base.have_constant_buffer_offset_cmd = FALSE;
 103    getenv_val = getenv("SVGA_FORCE_KERNEL_UNMAPS");
 104    vws->cache_maps = !getenv_val || strcmp(getenv_val, "0") == 0;
 105    vws->fence_ops = vmw_fence_ops_create(vws);
 106    if (!vws->fence_ops)
 107       goto out_no_fence_ops;
 108
 109    if(!vmw_pools_init(vws))
 110       goto out_no_pools;
 111
 112    if (!vmw_winsys_screen_init_svga(vws))
 113       goto out_no_svga;
 114
 115    _mesa_hash_table_insert(dev_hash, &vws->device, vws);
 116
 117    cnd_init(&vws->cs_cond);
 118    mtx_init(&vws->cs_mutex, mtx_plain);
 119
 120    return vws;
 121 out_no_svga:
 122    vmw_pools_cleanup(vws);
 123 out_no_pools:
 124    vws->fence_ops->destroy(vws->fence_ops);
 125 out_no_fence_ops:
 126    vmw_ioctl_cleanup(vws);
 127 out_no_ioctl:
 128    close(vws->ioctl.drm_fd);
 129    FREE(vws);
 130 out_no_vws:
 131    return NULL;
 132 }
 133
 134 void
 135 vmw_winsys_destroy(struct vmw_winsys_screen *vws)
 136 {
 137    if (--vws->open_count == 0) {
 138       _mesa_hash_table_remove_key(dev_hash, &vws->device);
 139       vmw_pools_cleanup(vws);
 140       vws->fence_ops->destroy(vws->fence_ops);
 141       vmw_ioctl_cleanup(vws);
 142       close(vws->ioctl.drm_fd);
 143       mtx_destroy(&vws->cs_mutex);
 144       cnd_destroy(&vws->cs_cond);
 145       FREE(vws);
 146    }
 147 }