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 "svga_cmd.h"
28#include "util/u_debug.h"
29#include "util/u_memory.h"
30#include "pipe/p_defines.h"
31#include "vmw_surface.h"
32#include "vmw_screen.h"
33#include "vmw_buffer.h"
34#include "vmw_context.h"
35#include "pipebuffer/pb_bufmgr.h"
36
37
38void *
39vmw_svga_winsys_surface_map(struct svga_winsys_context *swc,
40                            struct svga_winsys_surface *srf,
41                            unsigned flags, boolean *retry)
42{
43   struct vmw_svga_winsys_surface *vsrf = vmw_svga_winsys_surface(srf);
44   void *data = NULL;
45   struct pb_buffer *pb_buf;
46   uint32_t pb_flags;
47   struct vmw_winsys_screen *vws = vsrf->screen;
48
49   *retry = FALSE;
50   assert((flags & (PIPE_TRANSFER_READ | PIPE_TRANSFER_WRITE)) != 0);
51   pipe_mutex_lock(vsrf->mutex);
52
53   if (vsrf->mapcount) {
54      /*
55       * Only allow multiple readers to map.
56       */
57      if ((flags & PIPE_TRANSFER_WRITE) ||
58          (vsrf->map_mode & PIPE_TRANSFER_WRITE))
59         goto out_unlock;
60
61      data = vsrf->data;
62      goto out_mapped;
63   }
64
65   vsrf->rebind = FALSE;
66
67   /*
68    * If we intend to read, there's no point discarding the
69    * data if busy.
70    */
71   if (flags & PIPE_TRANSFER_READ || vsrf->shared)
72      flags &= ~PIPE_TRANSFER_DISCARD_WHOLE_RESOURCE;
73
74   /*
75    * Discard is a hint to a synchronized map.
76    */
77   if (flags & PIPE_TRANSFER_DISCARD_WHOLE_RESOURCE)
78      flags &= ~PIPE_TRANSFER_UNSYNCHRONIZED;
79
80   /*
81    * The surface is allowed to be referenced on the command stream iff
82    * we're mapping unsynchronized or discard. This is an early check.
83    * We need to recheck after a failing discard map.
84    */
85   if (!(flags & (PIPE_TRANSFER_DISCARD_WHOLE_RESOURCE |
86                  PIPE_TRANSFER_UNSYNCHRONIZED)) &&
87       p_atomic_read(&vsrf->validated)) {
88      *retry = TRUE;
89      goto out_unlock;
90   }
91
92   pb_flags = flags & (PIPE_TRANSFER_READ_WRITE | PIPE_TRANSFER_UNSYNCHRONIZED);
93
94   if (flags & PIPE_TRANSFER_DISCARD_WHOLE_RESOURCE) {
95      struct pb_manager *provider;
96      struct pb_desc desc;
97
98      /*
99       * First, if possible, try to map existing storage with DONTBLOCK.
100       */
101      if (!p_atomic_read(&vsrf->validated)) {
102         data = vmw_svga_winsys_buffer_map(&vws->base, vsrf->buf,
103                                           PIPE_TRANSFER_DONTBLOCK | pb_flags);
104         if (data)
105            goto out_mapped;
106      }
107
108      /*
109       * Attempt to get a new buffer.
110       */
111      provider = vws->pools.mob_fenced;
112      memset(&desc, 0, sizeof(desc));
113      desc.alignment = 4096;
114      pb_buf = provider->create_buffer(provider, vsrf->size, &desc);
115      if (pb_buf != NULL) {
116         struct svga_winsys_buffer *vbuf =
117            vmw_svga_winsys_buffer_wrap(pb_buf);
118
119         data = vmw_svga_winsys_buffer_map(&vws->base, vbuf, pb_flags);
120         if (data) {
121            vsrf->rebind = TRUE;
122            /*
123             * We've discarded data on this surface and thus
124             * it's data is no longer consider referenced.
125             */
126            vmw_swc_surface_clear_reference(swc, vsrf);
127            if (vsrf->buf)
128               vmw_svga_winsys_buffer_destroy(&vws->base, vsrf->buf);
129            vsrf->buf = vbuf;
130            goto out_mapped;
131         } else
132            vmw_svga_winsys_buffer_destroy(&vws->base, vbuf);
133      }
134      /*
135       * We couldn't get and map a new buffer for some reason.
136       * Fall through to an ordinary map.
137       * But tell pipe driver to flush now if already on validate list,
138       * Otherwise we'll overwrite previous contents.
139       */
140      if (!(flags & PIPE_TRANSFER_UNSYNCHRONIZED) &&
141          p_atomic_read(&vsrf->validated)) {
142         *retry = TRUE;
143         goto out_unlock;
144      }
145   }
146
147   pb_flags |= (flags & PIPE_TRANSFER_DONTBLOCK);
148   data = vmw_svga_winsys_buffer_map(&vws->base, vsrf->buf, pb_flags);
149   if (data == NULL)
150      goto out_unlock;
151
152out_mapped:
153   ++vsrf->mapcount;
154   vsrf->data = data;
155   vsrf->map_mode = flags & (PIPE_TRANSFER_READ | PIPE_TRANSFER_WRITE);
156out_unlock:
157   pipe_mutex_unlock(vsrf->mutex);
158   return data;
159}
160
161
162void
163vmw_svga_winsys_surface_unmap(struct svga_winsys_context *swc,
164                              struct svga_winsys_surface *srf,
165                              boolean *rebind)
166{
167   struct vmw_svga_winsys_surface *vsrf = vmw_svga_winsys_surface(srf);
168   pipe_mutex_lock(vsrf->mutex);
169   if (--vsrf->mapcount == 0) {
170      *rebind = vsrf->rebind;
171      vsrf->rebind = FALSE;
172      vmw_svga_winsys_buffer_unmap(&vsrf->screen->base, vsrf->buf);
173   } else {
174      *rebind = FALSE;
175   }
176   pipe_mutex_unlock(vsrf->mutex);
177}
178
179void
180vmw_svga_winsys_surface_reference(struct vmw_svga_winsys_surface **pdst,
181                                  struct vmw_svga_winsys_surface *src)
182{
183   struct pipe_reference *src_ref;
184   struct pipe_reference *dst_ref;
185   struct vmw_svga_winsys_surface *dst;
186
187   if(pdst == NULL || *pdst == src)
188      return;
189
190   dst = *pdst;
191
192   src_ref = src ? &src->refcnt : NULL;
193   dst_ref = dst ? &dst->refcnt : NULL;
194
195   if (pipe_reference(dst_ref, src_ref)) {
196      if (dst->buf)
197         vmw_svga_winsys_buffer_destroy(&dst->screen->base, dst->buf);
198      vmw_ioctl_surface_destroy(dst->screen, dst->sid);
199#ifdef DEBUG
200      /* to detect dangling pointers */
201      assert(p_atomic_read(&dst->validated) == 0);
202      dst->sid = SVGA3D_INVALID_ID;
203#endif
204      pipe_mutex_destroy(dst->mutex);
205      FREE(dst);
206   }
207
208   *pdst = src;
209}
210