1 /**********************************************************
2 * Copyright 2009-2023 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 void
vmw_svga_winsys_surface_init(struct svga_winsys_screen * sws,struct svga_winsys_surface * srf,unsigned surf_size,SVGA3dSurfaceAllFlags flags)38 vmw_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.dma_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
82 out_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);
96 out_unlock:
97 mtx_unlock(&vsrf->mutex);
98 }
99
100
101 void *
vmw_svga_winsys_surface_map(struct svga_winsys_context * swc,struct svga_winsys_surface * srf,unsigned flags,bool * retry,bool * rebind)102 vmw_svga_winsys_surface_map(struct svga_winsys_context *swc,
103 struct svga_winsys_surface *srf,
104 unsigned flags, bool *retry,
105 bool *rebind)
106 {
107 struct vmw_svga_winsys_surface *vsrf = vmw_svga_winsys_surface(srf);
108 void *data = NULL;
109 struct pb_buffer *pb_buf;
110 uint32_t pb_flags;
111 struct vmw_winsys_screen *vws = vsrf->screen;
112
113 *retry = false;
114 *rebind = false;
115 assert((flags & (PIPE_MAP_READ | PIPE_MAP_WRITE)) != 0);
116 mtx_lock(&vsrf->mutex);
117
118 if (vsrf->mapcount) {
119 /* Other mappers will get confused if we discard. */
120 flags &= ~PIPE_MAP_DISCARD_WHOLE_RESOURCE;
121 }
122
123 vsrf->rebind = false;
124
125 /*
126 * If we intend to read, there's no point discarding the
127 * data if busy.
128 */
129 if (flags & PIPE_MAP_READ || vsrf->shared)
130 flags &= ~PIPE_MAP_DISCARD_WHOLE_RESOURCE;
131
132 /*
133 * Discard is a hint to a synchronized map.
134 */
135 if (flags & PIPE_MAP_DISCARD_WHOLE_RESOURCE)
136 flags &= ~PIPE_MAP_UNSYNCHRONIZED;
137
138 /*
139 * The surface is allowed to be referenced on the command stream iff
140 * we're mapping unsynchronized or discard. This is an early check.
141 * We need to recheck after a failing discard map.
142 */
143 if (!(flags & (PIPE_MAP_DISCARD_WHOLE_RESOURCE |
144 PIPE_MAP_UNSYNCHRONIZED)) &&
145 p_atomic_read(&vsrf->validated)) {
146 *retry = true;
147 goto out_unlock;
148 }
149
150 pb_flags = flags & (PIPE_MAP_READ_WRITE | PIPE_MAP_UNSYNCHRONIZED |
151 PIPE_MAP_PERSISTENT);
152
153 if (flags & PIPE_MAP_DISCARD_WHOLE_RESOURCE) {
154 struct pb_manager *provider;
155 struct pb_desc desc;
156
157 /*
158 * First, if possible, try to map existing storage with DONTBLOCK.
159 */
160 if (!p_atomic_read(&vsrf->validated)) {
161 data = vmw_svga_winsys_buffer_map(&vws->base, vsrf->buf,
162 PIPE_MAP_DONTBLOCK | pb_flags);
163 if (data)
164 goto out_mapped;
165 }
166
167 /*
168 * Attempt to get a new buffer.
169 */
170 provider = vws->pools.dma_fenced;
171 memset(&desc, 0, sizeof(desc));
172 desc.alignment = 4096;
173 pb_buf = provider->create_buffer(provider, vsrf->size, &desc);
174 if (pb_buf != NULL) {
175 struct svga_winsys_buffer *vbuf =
176 vmw_svga_winsys_buffer_wrap(pb_buf);
177
178 data = vmw_svga_winsys_buffer_map(&vws->base, vbuf, pb_flags);
179 if (data) {
180 vsrf->rebind = true;
181 /*
182 * We've discarded data on this surface and thus
183 * it's data is no longer consider referenced.
184 */
185 vmw_swc_surface_clear_reference(swc, vsrf);
186 if (vsrf->buf)
187 vmw_svga_winsys_buffer_destroy(&vws->base, vsrf->buf);
188 vsrf->buf = vbuf;
189
190 /* Rebind persistent maps immediately */
191 if (flags & PIPE_MAP_PERSISTENT) {
192 *rebind = true;
193 vsrf->rebind = false;
194 }
195 goto out_mapped;
196 } else
197 vmw_svga_winsys_buffer_destroy(&vws->base, vbuf);
198 }
199 /*
200 * We couldn't get and map a new buffer for some reason.
201 * Fall through to an ordinary map.
202 * But tell pipe driver to flush now if already on validate list,
203 * Otherwise we'll overwrite previous contents.
204 */
205 if (!(flags & PIPE_MAP_UNSYNCHRONIZED) &&
206 p_atomic_read(&vsrf->validated)) {
207 *retry = true;
208 goto out_unlock;
209 }
210 }
211
212 pb_flags |= (flags & PIPE_MAP_DONTBLOCK);
213 data = vmw_svga_winsys_buffer_map(&vws->base, vsrf->buf, pb_flags);
214 if (data == NULL)
215 goto out_unlock;
216
217 out_mapped:
218 ++vsrf->mapcount;
219 vsrf->data = data;
220 vsrf->map_mode = flags & (PIPE_MAP_READ | PIPE_MAP_WRITE);
221 out_unlock:
222 mtx_unlock(&vsrf->mutex);
223 return data;
224 }
225
226
227 void
vmw_svga_winsys_surface_unmap(struct svga_winsys_context * swc,struct svga_winsys_surface * srf,bool * rebind)228 vmw_svga_winsys_surface_unmap(struct svga_winsys_context *swc,
229 struct svga_winsys_surface *srf,
230 bool *rebind)
231 {
232 struct vmw_svga_winsys_surface *vsrf = vmw_svga_winsys_surface(srf);
233 mtx_lock(&vsrf->mutex);
234 if (--vsrf->mapcount == 0) {
235 *rebind = vsrf->rebind;
236 vsrf->rebind = false;
237 } else {
238 *rebind = false;
239 }
240 vmw_svga_winsys_buffer_unmap(&vsrf->screen->base, vsrf->buf);
241 mtx_unlock(&vsrf->mutex);
242 }
243
244 void
vmw_svga_winsys_surface_reference(struct vmw_svga_winsys_surface ** pdst,struct vmw_svga_winsys_surface * src)245 vmw_svga_winsys_surface_reference(struct vmw_svga_winsys_surface **pdst,
246 struct vmw_svga_winsys_surface *src)
247 {
248 struct pipe_reference *src_ref;
249 struct pipe_reference *dst_ref;
250 struct vmw_svga_winsys_surface *dst;
251
252 if(pdst == NULL || *pdst == src)
253 return;
254
255 dst = *pdst;
256
257 src_ref = src ? &src->refcnt : NULL;
258 dst_ref = dst ? &dst->refcnt : NULL;
259
260 if (pipe_reference(dst_ref, src_ref)) {
261 if (dst->buf)
262 vmw_svga_winsys_buffer_destroy(&dst->screen->base, dst->buf);
263 vmw_ioctl_surface_destroy(dst->screen, dst->sid);
264 #ifdef DEBUG
265 /* to detect dangling pointers */
266 assert(p_atomic_read(&dst->validated) == 0);
267 dst->sid = SVGA3D_INVALID_ID;
268 #endif
269 mtx_destroy(&dst->mutex);
270 FREE(dst);
271 }
272
273 *pdst = src;
274 }
275