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#include "vmwgfx_drm.h"
31#include "xf86drm.h"
32
33#include "util/os_file.h"
34#include "util/u_memory.h"
35#include "pipe/p_compiler.h"
36#include "util/u_hash_table.h"
37#ifdef MAJOR_IN_MKDEV
38#include <sys/mkdev.h>
39#endif
40#ifdef MAJOR_IN_SYSMACROS
41#include <sys/sysmacros.h>
42#endif
43#include <sys/stat.h>
44#include <unistd.h>
45#include <fcntl.h>
46#include <sys/ioctl.h>
47#include <sys/mman.h>
48
49static struct hash_table *dev_hash = NULL;
50
51static bool vmw_dev_compare(const void *key1, const void *key2)
52{
53   return (major(*(dev_t *)key1) == major(*(dev_t *)key2) &&
54           minor(*(dev_t *)key1) == minor(*(dev_t *)key2));
55}
56
57static uint32_t vmw_dev_hash(const void *key)
58{
59   return (major(*(dev_t *) key) << 16) | minor(*(dev_t *) key);
60}
61
62#ifdef VMX86_STATS
63/**
64 * Initializes mksstat TLS store.
65 */
66static void
67vmw_winsys_screen_init_mksstat(struct vmw_winsys_screen *vws)
68{
69   size_t i;
70
71   for (i = 0; i < ARRAY_SIZE(vws->mksstat_tls); ++i) {
72      vws->mksstat_tls[i].stat_pages = NULL;
73      vws->mksstat_tls[i].stat_id = -1UL;
74      vws->mksstat_tls[i].pid = 0;
75   }
76}
77
78/**
79 * Deinits mksstat TLS store.
80 */
81static void
82vmw_winsys_screen_deinit_mksstat(struct vmw_winsys_screen *vws)
83{
84   size_t i;
85
86   for (i = 0; i < ARRAY_SIZE(vws->mksstat_tls); ++i) {
87      uint32_t expected = __atomic_load_n(&vws->mksstat_tls[i].pid, __ATOMIC_ACQUIRE);
88
89      if (expected == -1U) {
90         fprintf(stderr, "%s encountered locked mksstat TLS entry at index %lu.\n", __FUNCTION__, i);
91         continue;
92      }
93
94      if (expected == 0)
95         continue;
96
97      if (__atomic_compare_exchange_n(&vws->mksstat_tls[i].pid, &expected, 0, false, __ATOMIC_ACQ_REL, __ATOMIC_ACQUIRE)) {
98         struct drm_vmw_mksstat_remove_arg arg = {
99            .id = vws->mksstat_tls[i].stat_id
100         };
101
102         assert(vws->mksstat_tls[i].stat_pages);
103         assert(vws->mksstat_tls[i].stat_id != -1UL);
104
105         if (drmCommandWrite(vws->ioctl.drm_fd, DRM_VMW_MKSSTAT_REMOVE, &arg, sizeof(arg))) {
106            fprintf(stderr, "%s could not ioctl: %s\n", __FUNCTION__, strerror(errno));
107         } else if (munmap(vws->mksstat_tls[i].stat_pages, vmw_svga_winsys_stats_len())) {
108            fprintf(stderr, "%s could not munmap: %s\n", __FUNCTION__, strerror(errno));
109         }
110      } else {
111         fprintf(stderr, "%s encountered volatile mksstat TLS entry at index %lu.\n", __FUNCTION__, i);
112      }
113   }
114}
115
116#endif
117/* Called from vmw_drm_create_screen(), creates and initializes the
118 * vmw_winsys_screen structure, which is the main entity in this
119 * module.
120 * First, check whether a vmw_winsys_screen object already exists for
121 * this device, and in that case return that one, making sure that we
122 * have our own file descriptor open to DRM.
123 */
124
125struct vmw_winsys_screen *
126vmw_winsys_create( int fd )
127{
128   struct vmw_winsys_screen *vws;
129   struct stat stat_buf;
130   const char *getenv_val;
131
132   if (dev_hash == NULL) {
133      dev_hash = _mesa_hash_table_create(NULL, vmw_dev_hash, vmw_dev_compare);
134      if (dev_hash == NULL)
135         return NULL;
136   }
137
138   if (fstat(fd, &stat_buf))
139      return NULL;
140
141   vws = util_hash_table_get(dev_hash, &stat_buf.st_rdev);
142   if (vws) {
143      vws->open_count++;
144      return vws;
145   }
146
147   vws = CALLOC_STRUCT(vmw_winsys_screen);
148   if (!vws)
149      goto out_no_vws;
150
151   vws->device = stat_buf.st_rdev;
152   vws->open_count = 1;
153   vws->ioctl.drm_fd = os_dupfd_cloexec(fd);
154   vws->force_coherent = FALSE;
155   if (!vmw_ioctl_init(vws))
156      goto out_no_ioctl;
157
158   vws->base.have_gb_dma = !vws->force_coherent;
159   vws->base.need_to_rebind_resources = FALSE;
160   vws->base.have_transfer_from_buffer_cmd = vws->base.have_vgpu10;
161   vws->base.have_constant_buffer_offset_cmd = FALSE;
162   getenv_val = getenv("SVGA_FORCE_KERNEL_UNMAPS");
163   vws->cache_maps = !getenv_val || strcmp(getenv_val, "0") == 0;
164   vws->fence_ops = vmw_fence_ops_create(vws);
165   if (!vws->fence_ops)
166      goto out_no_fence_ops;
167
168   if(!vmw_pools_init(vws))
169      goto out_no_pools;
170
171   if (!vmw_winsys_screen_init_svga(vws))
172      goto out_no_svga;
173
174#ifdef VMX86_STATS
175   vmw_winsys_screen_init_mksstat(vws);
176#endif
177   _mesa_hash_table_insert(dev_hash, &vws->device, vws);
178
179   cnd_init(&vws->cs_cond);
180   mtx_init(&vws->cs_mutex, mtx_plain);
181
182   return vws;
183out_no_svga:
184   vmw_pools_cleanup(vws);
185out_no_pools:
186   vws->fence_ops->destroy(vws->fence_ops);
187out_no_fence_ops:
188   vmw_ioctl_cleanup(vws);
189out_no_ioctl:
190   close(vws->ioctl.drm_fd);
191   FREE(vws);
192out_no_vws:
193   return NULL;
194}
195
196void
197vmw_winsys_destroy(struct vmw_winsys_screen *vws)
198{
199   if (--vws->open_count == 0) {
200      _mesa_hash_table_remove_key(dev_hash, &vws->device);
201      vmw_pools_cleanup(vws);
202      vws->fence_ops->destroy(vws->fence_ops);
203      vmw_ioctl_cleanup(vws);
204#ifdef VMX86_STATS
205      vmw_winsys_screen_deinit_mksstat(vws);
206#endif
207      close(vws->ioctl.drm_fd);
208      mtx_destroy(&vws->cs_mutex);
209      cnd_destroy(&vws->cs_cond);
210      FREE(vws);
211   }
212}
213