1 /*
2 * Copyright © 2014-2015 Broadcom
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
13 * Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
21 * IN THE SOFTWARE.
22 */
23
24 /** @file vc4_job.c
25 *
26 * Functions for submitting VC4 render jobs to the kernel.
27 */
28
29 #include <xf86drm.h>
30 #include "vc4_context.h"
31 #include "util/hash_table.h"
32
33 static void
remove_from_ht(struct hash_table * ht,void * key)34 remove_from_ht(struct hash_table *ht, void *key)
35 {
36 struct hash_entry *entry = _mesa_hash_table_search(ht, key);
37 _mesa_hash_table_remove(ht, entry);
38 }
39
40 static void
vc4_job_free(struct vc4_context * vc4,struct vc4_job * job)41 vc4_job_free(struct vc4_context *vc4, struct vc4_job *job)
42 {
43 struct vc4_bo **referenced_bos = job->bo_pointers.base;
44 for (int i = 0; i < cl_offset(&job->bo_handles) / 4; i++) {
45 vc4_bo_unreference(&referenced_bos[i]);
46 }
47
48 remove_from_ht(vc4->jobs, &job->key);
49
50 if (job->color_write) {
51 remove_from_ht(vc4->write_jobs, job->color_write->texture);
52 pipe_surface_reference(&job->color_write, NULL);
53 }
54 if (job->msaa_color_write) {
55 remove_from_ht(vc4->write_jobs, job->msaa_color_write->texture);
56 pipe_surface_reference(&job->msaa_color_write, NULL);
57 }
58 if (job->zs_write) {
59 remove_from_ht(vc4->write_jobs, job->zs_write->texture);
60 pipe_surface_reference(&job->zs_write, NULL);
61 }
62 if (job->msaa_zs_write) {
63 remove_from_ht(vc4->write_jobs, job->msaa_zs_write->texture);
64 pipe_surface_reference(&job->msaa_zs_write, NULL);
65 }
66
67 pipe_surface_reference(&job->color_read, NULL);
68 pipe_surface_reference(&job->zs_read, NULL);
69
70 if (vc4->job == job)
71 vc4->job = NULL;
72
73 ralloc_free(job);
74 }
75
76 static struct vc4_job *
vc4_job_create(struct vc4_context * vc4)77 vc4_job_create(struct vc4_context *vc4)
78 {
79 struct vc4_job *job = rzalloc(vc4, struct vc4_job);
80
81 vc4_init_cl(job, &job->bcl);
82 vc4_init_cl(job, &job->shader_rec);
83 vc4_init_cl(job, &job->uniforms);
84 vc4_init_cl(job, &job->bo_handles);
85 vc4_init_cl(job, &job->bo_pointers);
86
87 job->draw_min_x = ~0;
88 job->draw_min_y = ~0;
89 job->draw_max_x = 0;
90 job->draw_max_y = 0;
91
92 return job;
93 }
94
95 void
vc4_flush_jobs_writing_resource(struct vc4_context * vc4,struct pipe_resource * prsc)96 vc4_flush_jobs_writing_resource(struct vc4_context *vc4,
97 struct pipe_resource *prsc)
98 {
99 struct hash_entry *entry = _mesa_hash_table_search(vc4->write_jobs,
100 prsc);
101 if (entry) {
102 struct vc4_job *job = entry->data;
103 vc4_job_submit(vc4, job);
104 }
105 }
106
107 void
vc4_flush_jobs_reading_resource(struct vc4_context * vc4,struct pipe_resource * prsc)108 vc4_flush_jobs_reading_resource(struct vc4_context *vc4,
109 struct pipe_resource *prsc)
110 {
111 struct vc4_resource *rsc = vc4_resource(prsc);
112
113 vc4_flush_jobs_writing_resource(vc4, prsc);
114
115 struct hash_entry *entry;
116 hash_table_foreach(vc4->jobs, entry) {
117 struct vc4_job *job = entry->data;
118
119 struct vc4_bo **referenced_bos = job->bo_pointers.base;
120 for (int i = 0; i < cl_offset(&job->bo_handles) / 4; i++) {
121 if (referenced_bos[i] == rsc->bo) {
122 vc4_job_submit(vc4, job);
123 continue;
124 }
125 }
126
127 /* Also check for the Z/color buffers, since the references to
128 * those are only added immediately before submit.
129 */
130 if (job->color_read && !(job->cleared & PIPE_CLEAR_COLOR)) {
131 struct vc4_resource *ctex =
132 vc4_resource(job->color_read->texture);
133 if (ctex->bo == rsc->bo) {
134 vc4_job_submit(vc4, job);
135 continue;
136 }
137 }
138
139 if (job->zs_read && !(job->cleared &
140 (PIPE_CLEAR_DEPTH | PIPE_CLEAR_STENCIL))) {
141 struct vc4_resource *ztex =
142 vc4_resource(job->zs_read->texture);
143 if (ztex->bo == rsc->bo) {
144 vc4_job_submit(vc4, job);
145 continue;
146 }
147 }
148 }
149 }
150
151 /**
152 * Returns a vc4_job struture for tracking V3D rendering to a particular FBO.
153 *
154 * If we've already started rendering to this FBO, then return old same job,
155 * otherwise make a new one. If we're beginning rendering to an FBO, make
156 * sure that any previous reads of the FBO (or writes to its color/Z surfaces)
157 * have been flushed.
158 */
159 struct vc4_job *
vc4_get_job(struct vc4_context * vc4,struct pipe_surface * cbuf,struct pipe_surface * zsbuf)160 vc4_get_job(struct vc4_context *vc4,
161 struct pipe_surface *cbuf, struct pipe_surface *zsbuf)
162 {
163 /* Return the existing job for this FBO if we have one */
164 struct vc4_job_key local_key = {.cbuf = cbuf, .zsbuf = zsbuf};
165 struct hash_entry *entry = _mesa_hash_table_search(vc4->jobs,
166 &local_key);
167 if (entry)
168 return entry->data;
169
170 /* Creating a new job. Make sure that any previous jobs reading or
171 * writing these buffers are flushed.
172 */
173 if (cbuf)
174 vc4_flush_jobs_reading_resource(vc4, cbuf->texture);
175 if (zsbuf)
176 vc4_flush_jobs_reading_resource(vc4, zsbuf->texture);
177
178 struct vc4_job *job = vc4_job_create(vc4);
179
180 if (cbuf) {
181 if (cbuf->texture->nr_samples > 1) {
182 job->msaa = true;
183 pipe_surface_reference(&job->msaa_color_write, cbuf);
184 } else {
185 pipe_surface_reference(&job->color_write, cbuf);
186 }
187 }
188
189 if (zsbuf) {
190 if (zsbuf->texture->nr_samples > 1) {
191 job->msaa = true;
192 pipe_surface_reference(&job->msaa_zs_write, zsbuf);
193 } else {
194 pipe_surface_reference(&job->zs_write, zsbuf);
195 }
196 }
197
198 if (job->msaa) {
199 job->tile_width = 32;
200 job->tile_height = 32;
201 } else {
202 job->tile_width = 64;
203 job->tile_height = 64;
204 }
205
206 if (cbuf)
207 _mesa_hash_table_insert(vc4->write_jobs, cbuf->texture, job);
208 if (zsbuf)
209 _mesa_hash_table_insert(vc4->write_jobs, zsbuf->texture, job);
210
211 job->key.cbuf = cbuf;
212 job->key.zsbuf = zsbuf;
213 _mesa_hash_table_insert(vc4->jobs, &job->key, job);
214
215 return job;
216 }
217
218 struct vc4_job *
vc4_get_job_for_fbo(struct vc4_context * vc4)219 vc4_get_job_for_fbo(struct vc4_context *vc4)
220 {
221 if (vc4->job)
222 return vc4->job;
223
224 struct pipe_surface *cbuf = vc4->framebuffer.cbufs[0];
225 struct pipe_surface *zsbuf = vc4->framebuffer.zsbuf;
226 struct vc4_job *job = vc4_get_job(vc4, cbuf, zsbuf);
227
228 /* The dirty flags are tracking what's been updated while vc4->job has
229 * been bound, so set them all to ~0 when switching between jobs. We
230 * also need to reset all state at the start of rendering.
231 */
232 vc4->dirty = ~0;
233
234 /* Set up the read surfaces in the job. If they aren't actually
235 * getting read (due to a clear starting the frame), job->cleared will
236 * mask out the read.
237 */
238 pipe_surface_reference(&job->color_read, cbuf);
239 pipe_surface_reference(&job->zs_read, zsbuf);
240
241 /* If we're binding to uninitialized buffers, no need to load their
242 * contents before drawing.
243 */
244 if (cbuf) {
245 struct vc4_resource *rsc = vc4_resource(cbuf->texture);
246 if (!rsc->writes)
247 job->cleared |= PIPE_CLEAR_COLOR0;
248 }
249
250 if (zsbuf) {
251 struct vc4_resource *rsc = vc4_resource(zsbuf->texture);
252 if (!rsc->writes)
253 job->cleared |= PIPE_CLEAR_DEPTH | PIPE_CLEAR_STENCIL;
254 }
255
256 job->draw_tiles_x = DIV_ROUND_UP(vc4->framebuffer.width,
257 job->tile_width);
258 job->draw_tiles_y = DIV_ROUND_UP(vc4->framebuffer.height,
259 job->tile_height);
260
261 vc4->job = job;
262
263 return job;
264 }
265
266 static void
vc4_submit_setup_rcl_surface(struct vc4_job * job,struct drm_vc4_submit_rcl_surface * submit_surf,struct pipe_surface * psurf,bool is_depth,bool is_write)267 vc4_submit_setup_rcl_surface(struct vc4_job *job,
268 struct drm_vc4_submit_rcl_surface *submit_surf,
269 struct pipe_surface *psurf,
270 bool is_depth, bool is_write)
271 {
272 struct vc4_surface *surf = vc4_surface(psurf);
273
274 if (!surf)
275 return;
276
277 struct vc4_resource *rsc = vc4_resource(psurf->texture);
278 submit_surf->hindex = vc4_gem_hindex(job, rsc->bo);
279 submit_surf->offset = surf->offset;
280
281 if (psurf->texture->nr_samples <= 1) {
282 if (is_depth) {
283 submit_surf->bits =
284 VC4_SET_FIELD(VC4_LOADSTORE_TILE_BUFFER_ZS,
285 VC4_LOADSTORE_TILE_BUFFER_BUFFER);
286
287 } else {
288 submit_surf->bits =
289 VC4_SET_FIELD(VC4_LOADSTORE_TILE_BUFFER_COLOR,
290 VC4_LOADSTORE_TILE_BUFFER_BUFFER) |
291 VC4_SET_FIELD(vc4_rt_format_is_565(psurf->format) ?
292 VC4_LOADSTORE_TILE_BUFFER_BGR565 :
293 VC4_LOADSTORE_TILE_BUFFER_RGBA8888,
294 VC4_LOADSTORE_TILE_BUFFER_FORMAT);
295 }
296 submit_surf->bits |=
297 VC4_SET_FIELD(surf->tiling,
298 VC4_LOADSTORE_TILE_BUFFER_TILING);
299 } else {
300 assert(!is_write);
301 submit_surf->flags |= VC4_SUBMIT_RCL_SURFACE_READ_IS_FULL_RES;
302 }
303
304 if (is_write)
305 rsc->writes++;
306 }
307
308 static void
vc4_submit_setup_rcl_render_config_surface(struct vc4_job * job,struct drm_vc4_submit_rcl_surface * submit_surf,struct pipe_surface * psurf)309 vc4_submit_setup_rcl_render_config_surface(struct vc4_job *job,
310 struct drm_vc4_submit_rcl_surface *submit_surf,
311 struct pipe_surface *psurf)
312 {
313 struct vc4_surface *surf = vc4_surface(psurf);
314
315 if (!surf)
316 return;
317
318 struct vc4_resource *rsc = vc4_resource(psurf->texture);
319 submit_surf->hindex = vc4_gem_hindex(job, rsc->bo);
320 submit_surf->offset = surf->offset;
321
322 if (psurf->texture->nr_samples <= 1) {
323 submit_surf->bits =
324 VC4_SET_FIELD(vc4_rt_format_is_565(surf->base.format) ?
325 VC4_RENDER_CONFIG_FORMAT_BGR565 :
326 VC4_RENDER_CONFIG_FORMAT_RGBA8888,
327 VC4_RENDER_CONFIG_FORMAT) |
328 VC4_SET_FIELD(surf->tiling,
329 VC4_RENDER_CONFIG_MEMORY_FORMAT);
330 }
331
332 rsc->writes++;
333 }
334
335 static void
vc4_submit_setup_rcl_msaa_surface(struct vc4_job * job,struct drm_vc4_submit_rcl_surface * submit_surf,struct pipe_surface * psurf)336 vc4_submit_setup_rcl_msaa_surface(struct vc4_job *job,
337 struct drm_vc4_submit_rcl_surface *submit_surf,
338 struct pipe_surface *psurf)
339 {
340 struct vc4_surface *surf = vc4_surface(psurf);
341
342 if (!surf)
343 return;
344
345 struct vc4_resource *rsc = vc4_resource(psurf->texture);
346 submit_surf->hindex = vc4_gem_hindex(job, rsc->bo);
347 submit_surf->offset = surf->offset;
348 submit_surf->bits = 0;
349 rsc->writes++;
350 }
351
352 /**
353 * Submits the job to the kernel and then reinitializes it.
354 */
355 void
vc4_job_submit(struct vc4_context * vc4,struct vc4_job * job)356 vc4_job_submit(struct vc4_context *vc4, struct vc4_job *job)
357 {
358 if (!job->needs_flush)
359 goto done;
360
361 /* The RCL setup would choke if the draw bounds cause no drawing, so
362 * just drop the drawing if that's the case.
363 */
364 if (job->draw_max_x <= job->draw_min_x ||
365 job->draw_max_y <= job->draw_min_y) {
366 goto done;
367 }
368
369 if (vc4_debug & VC4_DEBUG_CL) {
370 fprintf(stderr, "BCL:\n");
371 vc4_dump_cl(job->bcl.base, cl_offset(&job->bcl), false);
372 }
373
374 if (cl_offset(&job->bcl) > 0) {
375 /* Increment the semaphore indicating that binning is done and
376 * unblocking the render thread. Note that this doesn't act
377 * until the FLUSH completes.
378 */
379 cl_ensure_space(&job->bcl, 8);
380 struct vc4_cl_out *bcl = cl_start(&job->bcl);
381 cl_u8(&bcl, VC4_PACKET_INCREMENT_SEMAPHORE);
382 /* The FLUSH caps all of our bin lists with a
383 * VC4_PACKET_RETURN.
384 */
385 cl_u8(&bcl, VC4_PACKET_FLUSH);
386 cl_end(&job->bcl, bcl);
387 }
388 struct drm_vc4_submit_cl submit = {
389 .color_read.hindex = ~0,
390 .zs_read.hindex = ~0,
391 .color_write.hindex = ~0,
392 .msaa_color_write.hindex = ~0,
393 .zs_write.hindex = ~0,
394 .msaa_zs_write.hindex = ~0,
395 };
396
397 cl_ensure_space(&job->bo_handles, 6 * sizeof(uint32_t));
398 cl_ensure_space(&job->bo_pointers, 6 * sizeof(struct vc4_bo *));
399
400 if (job->resolve & PIPE_CLEAR_COLOR) {
401 if (!(job->cleared & PIPE_CLEAR_COLOR)) {
402 vc4_submit_setup_rcl_surface(job, &submit.color_read,
403 job->color_read,
404 false, false);
405 }
406 vc4_submit_setup_rcl_render_config_surface(job,
407 &submit.color_write,
408 job->color_write);
409 vc4_submit_setup_rcl_msaa_surface(job,
410 &submit.msaa_color_write,
411 job->msaa_color_write);
412 }
413 if (job->resolve & (PIPE_CLEAR_DEPTH | PIPE_CLEAR_STENCIL)) {
414 if (!(job->cleared & (PIPE_CLEAR_DEPTH | PIPE_CLEAR_STENCIL))) {
415 vc4_submit_setup_rcl_surface(job, &submit.zs_read,
416 job->zs_read, true, false);
417 }
418 vc4_submit_setup_rcl_surface(job, &submit.zs_write,
419 job->zs_write, true, true);
420 vc4_submit_setup_rcl_msaa_surface(job, &submit.msaa_zs_write,
421 job->msaa_zs_write);
422 }
423
424 if (job->msaa) {
425 /* This bit controls how many pixels the general
426 * (i.e. subsampled) loads/stores are iterating over
427 * (multisample loads replicate out to the other samples).
428 */
429 submit.color_write.bits |= VC4_RENDER_CONFIG_MS_MODE_4X;
430 /* Controls whether color_write's
431 * VC4_PACKET_STORE_MS_TILE_BUFFER does 4x decimation
432 */
433 submit.color_write.bits |= VC4_RENDER_CONFIG_DECIMATE_MODE_4X;
434 }
435
436 submit.bo_handles = (uintptr_t)job->bo_handles.base;
437 submit.bo_handle_count = cl_offset(&job->bo_handles) / 4;
438 submit.bin_cl = (uintptr_t)job->bcl.base;
439 submit.bin_cl_size = cl_offset(&job->bcl);
440 submit.shader_rec = (uintptr_t)job->shader_rec.base;
441 submit.shader_rec_size = cl_offset(&job->shader_rec);
442 submit.shader_rec_count = job->shader_rec_count;
443 submit.uniforms = (uintptr_t)job->uniforms.base;
444 submit.uniforms_size = cl_offset(&job->uniforms);
445
446 assert(job->draw_min_x != ~0 && job->draw_min_y != ~0);
447 submit.min_x_tile = job->draw_min_x / job->tile_width;
448 submit.min_y_tile = job->draw_min_y / job->tile_height;
449 submit.max_x_tile = (job->draw_max_x - 1) / job->tile_width;
450 submit.max_y_tile = (job->draw_max_y - 1) / job->tile_height;
451 submit.width = job->draw_width;
452 submit.height = job->draw_height;
453 if (job->cleared) {
454 submit.flags |= VC4_SUBMIT_CL_USE_CLEAR_COLOR;
455 submit.clear_color[0] = job->clear_color[0];
456 submit.clear_color[1] = job->clear_color[1];
457 submit.clear_z = job->clear_depth;
458 submit.clear_s = job->clear_stencil;
459 }
460
461 if (!(vc4_debug & VC4_DEBUG_NORAST)) {
462 int ret;
463
464 #ifndef USE_VC4_SIMULATOR
465 ret = drmIoctl(vc4->fd, DRM_IOCTL_VC4_SUBMIT_CL, &submit);
466 #else
467 ret = vc4_simulator_flush(vc4, &submit, job);
468 #endif
469 static bool warned = false;
470 if (ret && !warned) {
471 fprintf(stderr, "Draw call returned %s. "
472 "Expect corruption.\n", strerror(errno));
473 warned = true;
474 } else if (!ret) {
475 vc4->last_emit_seqno = submit.seqno;
476 }
477 }
478
479 if (vc4->last_emit_seqno - vc4->screen->finished_seqno > 5) {
480 if (!vc4_wait_seqno(vc4->screen,
481 vc4->last_emit_seqno - 5,
482 PIPE_TIMEOUT_INFINITE,
483 "job throttling")) {
484 fprintf(stderr, "Job throttling failed\n");
485 }
486 }
487
488 if (vc4_debug & VC4_DEBUG_ALWAYS_SYNC) {
489 if (!vc4_wait_seqno(vc4->screen, vc4->last_emit_seqno,
490 PIPE_TIMEOUT_INFINITE, "sync")) {
491 fprintf(stderr, "Wait failed.\n");
492 abort();
493 }
494 }
495
496 done:
497 vc4_job_free(vc4, job);
498 }
499
500 static bool
vc4_job_compare(const void * a,const void * b)501 vc4_job_compare(const void *a, const void *b)
502 {
503 return memcmp(a, b, sizeof(struct vc4_job_key)) == 0;
504 }
505
506 static uint32_t
vc4_job_hash(const void * key)507 vc4_job_hash(const void *key)
508 {
509 return _mesa_hash_data(key, sizeof(struct vc4_job_key));
510 }
511
512 void
vc4_job_init(struct vc4_context * vc4)513 vc4_job_init(struct vc4_context *vc4)
514 {
515 vc4->jobs = _mesa_hash_table_create(vc4,
516 vc4_job_hash,
517 vc4_job_compare);
518 vc4->write_jobs = _mesa_hash_table_create(vc4,
519 _mesa_hash_pointer,
520 _mesa_key_pointer_equal);
521 }
522
523