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
37void
38vmw_svga_winsys_surface_init(struct svga_winsys_screen *sws,
39                             struct svga_winsys_surface *srf,
40                             unsigned surf_size, SVGA3dSurfaceAllFlags flags)
41{
42   struct vmw_svga_winsys_surface *vsrf = vmw_svga_winsys_surface(srf);
43   void *data = NULL;
44   struct pb_buffer *pb_buf;
45   uint32_t pb_flags;
46   struct vmw_winsys_screen *vws = vsrf->screen;
47   pb_flags = PIPE_MAP_WRITE | PIPE_MAP_DISCARD_WHOLE_RESOURCE;
48
49   struct pb_manager *provider;
50   struct pb_desc desc;
51
52   mtx_lock(&vsrf->mutex);
53   data = vmw_svga_winsys_buffer_map(&vws->base, vsrf->buf, pb_flags);
54   if (data)
55      goto out_mapped;
56
57   provider = vws->pools.mob_fenced;
58   memset(&desc, 0, sizeof(desc));
59   desc.alignment = 4096;
60   pb_buf = provider->create_buffer(provider, vsrf->size, &desc);
61   if (pb_buf != NULL) {
62      struct svga_winsys_buffer *vbuf =
63         vmw_svga_winsys_buffer_wrap(pb_buf);
64
65      data = vmw_svga_winsys_buffer_map(&vws->base, vbuf, pb_flags);
66      if (data) {
67         vsrf->rebind = TRUE;
68         if (vsrf->buf)
69            vmw_svga_winsys_buffer_destroy(&vws->base, vsrf->buf);
70         vsrf->buf = vbuf;
71         goto out_mapped;
72      } else {
73         vmw_svga_winsys_buffer_destroy(&vws->base, vbuf);
74         goto out_unlock;
75      }
76   }
77   else {
78      /* Cannot create a buffer, just unlock */
79      goto out_unlock;
80   }
81
82out_mapped:
83   mtx_unlock(&vsrf->mutex);
84
85   if (data) {
86      if (flags & SVGA3D_SURFACE_BIND_STREAM_OUTPUT) {
87         memset(data, 0, surf_size + sizeof(SVGA3dDXSOState));
88      }
89      else {
90         memset(data, 0, surf_size);
91      }
92   }
93
94   mtx_lock(&vsrf->mutex);
95   vmw_svga_winsys_buffer_unmap(&vsrf->screen->base, vsrf->buf);
96out_unlock:
97   mtx_unlock(&vsrf->mutex);
98}
99
100
101
102void *
103vmw_svga_winsys_surface_map(struct svga_winsys_context *swc,
104                            struct svga_winsys_surface *srf,
105                            unsigned flags, boolean *retry,
106                            boolean *rebind)
107{
108   struct vmw_svga_winsys_surface *vsrf = vmw_svga_winsys_surface(srf);
109   void *data = NULL;
110   struct pb_buffer *pb_buf;
111   uint32_t pb_flags;
112   struct vmw_winsys_screen *vws = vsrf->screen;
113
114   *retry = FALSE;
115   *rebind = FALSE;
116   assert((flags & (PIPE_MAP_READ | PIPE_MAP_WRITE)) != 0);
117   mtx_lock(&vsrf->mutex);
118
119   if (vsrf->mapcount) {
120      /* Other mappers will get confused if we discard. */
121      flags &= ~PIPE_MAP_DISCARD_WHOLE_RESOURCE;
122   }
123
124   vsrf->rebind = FALSE;
125
126   /*
127    * If we intend to read, there's no point discarding the
128    * data if busy.
129    */
130   if (flags & PIPE_MAP_READ || vsrf->shared)
131      flags &= ~PIPE_MAP_DISCARD_WHOLE_RESOURCE;
132
133   /*
134    * Discard is a hint to a synchronized map.
135    */
136   if (flags & PIPE_MAP_DISCARD_WHOLE_RESOURCE)
137      flags &= ~PIPE_MAP_UNSYNCHRONIZED;
138
139   /*
140    * The surface is allowed to be referenced on the command stream iff
141    * we're mapping unsynchronized or discard. This is an early check.
142    * We need to recheck after a failing discard map.
143    */
144   if (!(flags & (PIPE_MAP_DISCARD_WHOLE_RESOURCE |
145                  PIPE_MAP_UNSYNCHRONIZED)) &&
146       p_atomic_read(&vsrf->validated)) {
147      *retry = TRUE;
148      goto out_unlock;
149   }
150
151   pb_flags = flags & (PIPE_MAP_READ_WRITE | PIPE_MAP_UNSYNCHRONIZED |
152      PIPE_MAP_PERSISTENT);
153
154   if (flags & PIPE_MAP_DISCARD_WHOLE_RESOURCE) {
155      struct pb_manager *provider;
156      struct pb_desc desc;
157
158      /*
159       * First, if possible, try to map existing storage with DONTBLOCK.
160       */
161      if (!p_atomic_read(&vsrf->validated)) {
162         data = vmw_svga_winsys_buffer_map(&vws->base, vsrf->buf,
163                                           PIPE_MAP_DONTBLOCK | pb_flags);
164         if (data)
165            goto out_mapped;
166      }
167
168      /*
169       * Attempt to get a new buffer.
170       */
171      provider = vws->pools.mob_fenced;
172      memset(&desc, 0, sizeof(desc));
173      desc.alignment = 4096;
174      pb_buf = provider->create_buffer(provider, vsrf->size, &desc);
175      if (pb_buf != NULL) {
176         struct svga_winsys_buffer *vbuf =
177            vmw_svga_winsys_buffer_wrap(pb_buf);
178
179         data = vmw_svga_winsys_buffer_map(&vws->base, vbuf, pb_flags);
180         if (data) {
181            vsrf->rebind = TRUE;
182            /*
183             * We've discarded data on this surface and thus
184             * it's data is no longer consider referenced.
185             */
186            vmw_swc_surface_clear_reference(swc, vsrf);
187            if (vsrf->buf)
188               vmw_svga_winsys_buffer_destroy(&vws->base, vsrf->buf);
189            vsrf->buf = vbuf;
190
191            /* Rebind persistent maps immediately */
192            if (flags & PIPE_MAP_PERSISTENT) {
193               *rebind = TRUE;
194               vsrf->rebind = FALSE;
195            }
196            goto out_mapped;
197         } else
198            vmw_svga_winsys_buffer_destroy(&vws->base, vbuf);
199      }
200      /*
201       * We couldn't get and map a new buffer for some reason.
202       * Fall through to an ordinary map.
203       * But tell pipe driver to flush now if already on validate list,
204       * Otherwise we'll overwrite previous contents.
205       */
206      if (!(flags & PIPE_MAP_UNSYNCHRONIZED) &&
207          p_atomic_read(&vsrf->validated)) {
208         *retry = TRUE;
209         goto out_unlock;
210      }
211   }
212
213   pb_flags |= (flags & PIPE_MAP_DONTBLOCK);
214   data = vmw_svga_winsys_buffer_map(&vws->base, vsrf->buf, pb_flags);
215   if (data == NULL)
216      goto out_unlock;
217
218out_mapped:
219   ++vsrf->mapcount;
220   vsrf->data = data;
221   vsrf->map_mode = flags & (PIPE_MAP_READ | PIPE_MAP_WRITE);
222out_unlock:
223   mtx_unlock(&vsrf->mutex);
224   return data;
225}
226
227
228void
229vmw_svga_winsys_surface_unmap(struct svga_winsys_context *swc,
230                              struct svga_winsys_surface *srf,
231                              boolean *rebind)
232{
233   struct vmw_svga_winsys_surface *vsrf = vmw_svga_winsys_surface(srf);
234   mtx_lock(&vsrf->mutex);
235   if (--vsrf->mapcount == 0) {
236      *rebind = vsrf->rebind;
237      vsrf->rebind = FALSE;
238   } else {
239      *rebind = FALSE;
240   }
241   vmw_svga_winsys_buffer_unmap(&vsrf->screen->base, vsrf->buf);
242   mtx_unlock(&vsrf->mutex);
243}
244
245void
246vmw_svga_winsys_surface_reference(struct vmw_svga_winsys_surface **pdst,
247                                  struct vmw_svga_winsys_surface *src)
248{
249   struct pipe_reference *src_ref;
250   struct pipe_reference *dst_ref;
251   struct vmw_svga_winsys_surface *dst;
252
253   if(pdst == NULL || *pdst == src)
254      return;
255
256   dst = *pdst;
257
258   src_ref = src ? &src->refcnt : NULL;
259   dst_ref = dst ? &dst->refcnt : NULL;
260
261   if (pipe_reference(dst_ref, src_ref)) {
262      if (dst->buf)
263         vmw_svga_winsys_buffer_destroy(&dst->screen->base, dst->buf);
264      vmw_ioctl_surface_destroy(dst->screen, dst->sid);
265#ifdef DEBUG
266      /* to detect dangling pointers */
267      assert(p_atomic_read(&dst->validated) == 0);
268      dst->sid = SVGA3D_INVALID_ID;
269#endif
270      mtx_destroy(&dst->mutex);
271      FREE(dst);
272   }
273
274   *pdst = src;
275}
276