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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 
vmw_dev_compare(const void * key1,const void * key2)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 
vmw_dev_hash(const void * key)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 *
vmw_winsys_create(int fd)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
vmw_winsys_destroy(struct vmw_winsys_screen * vws)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 }
148