1 /**********************************************************
2 * Copyright 2008-2009 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 #include "svga_cmd.h"
27
28 #include "util/u_format.h"
29 #include "util/u_inlines.h"
30 #include "util/u_prim.h"
31 #include "util/u_time.h"
32 #include "indices/u_indices.h"
33
34 #include "svga_hw_reg.h"
35 #include "svga_context.h"
36 #include "svga_screen.h"
37 #include "svga_draw.h"
38 #include "svga_state.h"
39 #include "svga_swtnl.h"
40 #include "svga_debug.h"
41 #include "svga_resource_buffer.h"
42 #include "util/u_upload_mgr.h"
43
44 /**
45 * Determine the ranges to upload for the user-buffers referenced
46 * by the next draw command.
47 *
48 * TODO: It might be beneficial to support multiple ranges. In that case,
49 * the struct svga_buffer::uploaded member should be made an array or a
50 * list, since we need to account for the possibility that different ranges
51 * may be uploaded to different hardware buffers chosen by the utility
52 * upload manager.
53 */
54
55 static void
svga_user_buffer_range(struct svga_context * svga,unsigned start,unsigned count,unsigned instance_count)56 svga_user_buffer_range(struct svga_context *svga,
57 unsigned start,
58 unsigned count,
59 unsigned instance_count)
60 {
61 const struct pipe_vertex_element *ve = svga->curr.velems->velem;
62 int i;
63
64 /*
65 * Release old uploaded range (if not done already) and
66 * initialize new ranges.
67 */
68
69 for (i=0; i < svga->curr.velems->count; i++) {
70 struct pipe_vertex_buffer *vb =
71 &svga->curr.vb[ve[i].vertex_buffer_index];
72
73 if (vb->buffer && svga_buffer_is_user_buffer(vb->buffer)) {
74 struct svga_buffer *buffer = svga_buffer(vb->buffer);
75
76 pipe_resource_reference(&buffer->uploaded.buffer, NULL);
77 buffer->uploaded.start = ~0;
78 buffer->uploaded.end = 0;
79 }
80 }
81
82 for (i=0; i < svga->curr.velems->count; i++) {
83 struct pipe_vertex_buffer *vb =
84 &svga->curr.vb[ve[i].vertex_buffer_index];
85
86 if (vb->buffer && svga_buffer_is_user_buffer(vb->buffer)) {
87 struct svga_buffer *buffer = svga_buffer(vb->buffer);
88 unsigned first, size;
89 unsigned instance_div = ve[i].instance_divisor;
90 unsigned elemSize = util_format_get_blocksize(ve[i].src_format);
91
92 svga->dirty |= SVGA_NEW_VBUFFER;
93
94 if (instance_div) {
95 first = ve[i].src_offset;
96 count = (instance_count + instance_div - 1) / instance_div;
97 size = vb->stride * (count - 1) + elemSize;
98 } else {
99 first = vb->stride * start + ve[i].src_offset;
100 size = vb->stride * (count - 1) + elemSize;
101 }
102
103 buffer->uploaded.start = MIN2(buffer->uploaded.start, first);
104 buffer->uploaded.end = MAX2(buffer->uploaded.end, first + size);
105 }
106 }
107 }
108
109 /**
110 * svga_upload_user_buffers - upload parts of user buffers
111 *
112 * This function streams a part of a user buffer to hw and fills
113 * svga_buffer::uploaded with information on the upload.
114 */
115
116 static int
svga_upload_user_buffers(struct svga_context * svga,unsigned start,unsigned count,unsigned instance_count)117 svga_upload_user_buffers(struct svga_context *svga,
118 unsigned start,
119 unsigned count,
120 unsigned instance_count)
121 {
122 const struct pipe_vertex_element *ve = svga->curr.velems->velem;
123 unsigned i;
124 int ret;
125
126 svga_user_buffer_range(svga, start, count, instance_count);
127
128 for (i=0; i < svga->curr.velems->count; i++) {
129 struct pipe_vertex_buffer *vb =
130 &svga->curr.vb[ve[i].vertex_buffer_index];
131
132 if (vb->buffer && svga_buffer_is_user_buffer(vb->buffer)) {
133 struct svga_buffer *buffer = svga_buffer(vb->buffer);
134
135 /*
136 * Check if already uploaded. Otherwise go ahead and upload.
137 */
138
139 if (buffer->uploaded.buffer)
140 continue;
141
142 ret = u_upload_buffer( svga->upload_vb,
143 0,
144 buffer->uploaded.start,
145 buffer->uploaded.end - buffer->uploaded.start,
146 &buffer->b.b,
147 &buffer->uploaded.offset,
148 &buffer->uploaded.buffer);
149
150 if (ret)
151 return ret;
152
153 if (0)
154 debug_printf("%s: %d: orig buf %p upl buf %p ofs %d sofs %d"
155 " sz %d\n",
156 __FUNCTION__,
157 i,
158 buffer,
159 buffer->uploaded.buffer,
160 buffer->uploaded.offset,
161 buffer->uploaded.start,
162 buffer->uploaded.end - buffer->uploaded.start);
163
164 vb->buffer_offset = buffer->uploaded.offset;
165 }
166 }
167
168 return PIPE_OK;
169 }
170
171 /**
172 * svga_release_user_upl_buffers - release uploaded parts of user buffers
173 *
174 * This function releases the hw copy of the uploaded fraction of the
175 * user-buffer. It's important to do this as soon as all draw calls
176 * affecting the uploaded fraction are issued, as this allows for
177 * efficient reuse of the hardware surface backing the uploaded fraction.
178 *
179 * svga_buffer::source_offset is set to 0, and svga_buffer::uploaded::buffer
180 * is set to 0.
181 */
182
183 static void
svga_release_user_upl_buffers(struct svga_context * svga)184 svga_release_user_upl_buffers(struct svga_context *svga)
185 {
186 unsigned i;
187 unsigned nr;
188
189 nr = svga->curr.num_vertex_buffers;
190
191 for (i = 0; i < nr; ++i) {
192 struct pipe_vertex_buffer *vb = &svga->curr.vb[i];
193
194 if (vb->buffer && svga_buffer_is_user_buffer(vb->buffer)) {
195 struct svga_buffer *buffer = svga_buffer(vb->buffer);
196
197 /* The buffer_offset is relative to the uploaded buffer.
198 * Since we're discarding that buffer we need to reset this offset
199 * so it's not inadvertantly applied to a subsequent draw.
200 *
201 * XXX a root problem here is that the svga->curr.vb[] information
202 * is getting set both by gallium API calls and by code in
203 * svga_upload_user_buffers(). We should instead have two copies
204 * of the vertex buffer information and choose between as needed.
205 */
206 vb->buffer_offset = 0;
207
208 buffer->uploaded.start = ~0;
209 buffer->uploaded.end = 0;
210 if (buffer->uploaded.buffer)
211 pipe_resource_reference(&buffer->uploaded.buffer, NULL);
212 }
213 }
214 }
215
216
217
218 static enum pipe_error
retry_draw_range_elements(struct svga_context * svga,struct pipe_resource * index_buffer,unsigned index_size,int index_bias,unsigned min_index,unsigned max_index,unsigned prim,unsigned start,unsigned count,unsigned instance_count,boolean do_retry)219 retry_draw_range_elements( struct svga_context *svga,
220 struct pipe_resource *index_buffer,
221 unsigned index_size,
222 int index_bias,
223 unsigned min_index,
224 unsigned max_index,
225 unsigned prim,
226 unsigned start,
227 unsigned count,
228 unsigned instance_count,
229 boolean do_retry )
230 {
231 enum pipe_error ret = PIPE_OK;
232
233 svga_hwtnl_set_unfilled( svga->hwtnl,
234 svga->curr.rast->hw_unfilled );
235
236 svga_hwtnl_set_flatshade( svga->hwtnl,
237 svga->curr.rast->templ.flatshade,
238 svga->curr.rast->templ.flatshade_first );
239
240 ret = svga_upload_user_buffers( svga, min_index + index_bias,
241 max_index - min_index + 1, instance_count );
242 if (ret != PIPE_OK)
243 goto retry;
244
245 ret = svga_update_state( svga, SVGA_STATE_HW_DRAW );
246 if (ret != PIPE_OK)
247 goto retry;
248
249 ret = svga_hwtnl_draw_range_elements( svga->hwtnl,
250 index_buffer, index_size, index_bias,
251 min_index, max_index,
252 prim, start, count );
253 if (ret != PIPE_OK)
254 goto retry;
255
256 return PIPE_OK;
257
258 retry:
259 svga_context_flush( svga, NULL );
260
261 if (do_retry)
262 {
263 return retry_draw_range_elements( svga,
264 index_buffer, index_size, index_bias,
265 min_index, max_index,
266 prim, start, count,
267 instance_count, FALSE );
268 }
269
270 return ret;
271 }
272
273
274 static enum pipe_error
retry_draw_arrays(struct svga_context * svga,unsigned prim,unsigned start,unsigned count,unsigned instance_count,boolean do_retry)275 retry_draw_arrays( struct svga_context *svga,
276 unsigned prim,
277 unsigned start,
278 unsigned count,
279 unsigned instance_count,
280 boolean do_retry )
281 {
282 enum pipe_error ret;
283
284 svga_hwtnl_set_unfilled( svga->hwtnl,
285 svga->curr.rast->hw_unfilled );
286
287 svga_hwtnl_set_flatshade( svga->hwtnl,
288 svga->curr.rast->templ.flatshade,
289 svga->curr.rast->templ.flatshade_first );
290
291 ret = svga_upload_user_buffers( svga, start, count, instance_count );
292
293 if (ret != PIPE_OK)
294 goto retry;
295
296 ret = svga_update_state( svga, SVGA_STATE_HW_DRAW );
297 if (ret != PIPE_OK)
298 goto retry;
299
300 ret = svga_hwtnl_draw_arrays( svga->hwtnl, prim,
301 start, count );
302 if (ret != PIPE_OK)
303 goto retry;
304
305 return PIPE_OK;
306
307 retry:
308 if (ret == PIPE_ERROR_OUT_OF_MEMORY && do_retry)
309 {
310 svga_context_flush( svga, NULL );
311
312 return retry_draw_arrays( svga,
313 prim,
314 start,
315 count,
316 instance_count,
317 FALSE );
318 }
319
320 return ret;
321 }
322
323
324 static void
svga_draw_vbo(struct pipe_context * pipe,const struct pipe_draw_info * info)325 svga_draw_vbo(struct pipe_context *pipe, const struct pipe_draw_info *info)
326 {
327 struct svga_context *svga = svga_context( pipe );
328 unsigned reduced_prim = u_reduced_prim( info->mode );
329 unsigned count = info->count;
330 enum pipe_error ret = 0;
331 boolean needed_swtnl;
332
333 if (!u_trim_pipe_prim( info->mode, &count ))
334 return;
335
336 /*
337 * Mark currently bound target surfaces as dirty
338 * doesn't really matter if it is done before drawing.
339 *
340 * TODO If we ever normaly return something other then
341 * true we should not mark it as dirty then.
342 */
343 svga_mark_surfaces_dirty(svga_context(pipe));
344
345 if (svga->curr.reduced_prim != reduced_prim) {
346 svga->curr.reduced_prim = reduced_prim;
347 svga->dirty |= SVGA_NEW_REDUCED_PRIMITIVE;
348 }
349
350 needed_swtnl = svga->state.sw.need_swtnl;
351
352 svga_update_state_retry( svga, SVGA_STATE_NEED_SWTNL );
353
354 #ifdef DEBUG
355 if (svga->curr.vs->base.id == svga->debug.disable_shader ||
356 svga->curr.fs->base.id == svga->debug.disable_shader)
357 return;
358 #endif
359
360 if (svga->state.sw.need_swtnl) {
361 if (!needed_swtnl) {
362 /*
363 * We're switching from HW to SW TNL. SW TNL will require mapping all
364 * currently bound vertex buffers, some of which may already be
365 * referenced in the current command buffer as result of previous HW
366 * TNL. So flush now, to prevent the context to flush while a referred
367 * vertex buffer is mapped.
368 */
369
370 svga_context_flush(svga, NULL);
371 }
372
373 /* Avoid leaking the previous hwtnl bias to swtnl */
374 svga_hwtnl_set_index_bias( svga->hwtnl, 0 );
375 ret = svga_swtnl_draw_vbo( svga, info );
376 }
377 else {
378 if (info->indexed && svga->curr.ib.buffer) {
379 unsigned offset;
380
381 assert(svga->curr.ib.offset % svga->curr.ib.index_size == 0);
382 offset = svga->curr.ib.offset / svga->curr.ib.index_size;
383
384 ret = retry_draw_range_elements( svga,
385 svga->curr.ib.buffer,
386 svga->curr.ib.index_size,
387 info->index_bias,
388 info->min_index,
389 info->max_index,
390 info->mode,
391 info->start + offset,
392 info->count,
393 info->instance_count,
394 TRUE );
395 }
396 else {
397 ret = retry_draw_arrays( svga,
398 info->mode,
399 info->start,
400 info->count,
401 info->instance_count,
402 TRUE );
403 }
404 }
405
406 /* XXX: Silence warnings, do something sensible here? */
407 (void)ret;
408
409 svga_release_user_upl_buffers( svga );
410
411 if (SVGA_DEBUG & DEBUG_FLUSH) {
412 svga_hwtnl_flush_retry( svga );
413 svga_context_flush(svga, NULL);
414 }
415 }
416
417
svga_init_draw_functions(struct svga_context * svga)418 void svga_init_draw_functions( struct svga_context *svga )
419 {
420 svga->pipe.draw_vbo = svga_draw_vbo;
421 }
422