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dt-bindings: mtd: ingenic: Use standard ecc-engine property
[linux/fpc-iii.git] / drivers / gpu / drm / msm / msm_gem_submit.c
blob12b983fc0b567601fa796840b65f7135209b933b
1 /*
2 * Copyright (C) 2013 Red Hat
3 * Author: Rob Clark <robdclark@gmail.com>
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 as published by
7 * the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
12 * more details.
13 *
14 * You should have received a copy of the GNU General Public License along with
15 * this program. If not, see <http://www.gnu.org/licenses/>.
16 */
17
18 #include <linux/sync_file.h>
19
20 #include "msm_drv.h"
21 #include "msm_gpu.h"
22 #include "msm_gem.h"
23 #include "msm_gpu_trace.h"
24
25 /*
26 * Cmdstream submission:
27 */
28
29 /* make sure these don't conflict w/ MSM_SUBMIT_BO_x */
30 #define BO_VALID 0x8000 /* is current addr in cmdstream correct/valid? */
31 #define BO_LOCKED 0x4000
32 #define BO_PINNED 0x2000
33
34 static struct msm_gem_submit *submit_create(struct drm_device *dev,
35 struct msm_gpu *gpu, struct msm_gpu_submitqueue *queue,
36 uint32_t nr_bos, uint32_t nr_cmds)
37 {
38 struct msm_gem_submit *submit;
39 uint64_t sz = sizeof(*submit) + ((u64)nr_bos * sizeof(submit->bos[0])) +
40 ((u64)nr_cmds * sizeof(submit->cmd[0]));
41
42 if (sz > SIZE_MAX)
43 return NULL;
44
45 submit = kmalloc(sz, GFP_KERNEL | __GFP_NOWARN | __GFP_NORETRY);
46 if (!submit)
47 return NULL;
48
49 submit->dev = dev;
50 submit->gpu = gpu;
51 submit->fence = NULL;
52 submit->cmd = (void *)&submit->bos[nr_bos];
53 submit->queue = queue;
54 submit->ring = gpu->rb[queue->prio];
55
56 /* initially, until copy_from_user() and bo lookup succeeds: */
57 submit->nr_bos = 0;
58 submit->nr_cmds = 0;
59
60 INIT_LIST_HEAD(&submit->node);
61 INIT_LIST_HEAD(&submit->bo_list);
62 ww_acquire_init(&submit->ticket, &reservation_ww_class);
63
64 return submit;
65 }
66
67 void msm_gem_submit_free(struct msm_gem_submit *submit)
68 {
69 dma_fence_put(submit->fence);
70 list_del(&submit->node);
71 put_pid(submit->pid);
72 msm_submitqueue_put(submit->queue);
73
74 kfree(submit);
75 }
76
77 static inline unsigned long __must_check
78 copy_from_user_inatomic(void *to, const void __user *from, unsigned long n)
79 {
80 if (access_ok(from, n))
81 return __copy_from_user_inatomic(to, from, n);
82 return -EFAULT;
83 }
84
85 static int submit_lookup_objects(struct msm_gem_submit *submit,
86 struct drm_msm_gem_submit *args, struct drm_file *file)
87 {
88 unsigned i;
89 int ret = 0;
90
91 spin_lock(&file->table_lock);
92 pagefault_disable();
93
94 for (i = 0; i < args->nr_bos; i++) {
95 struct drm_msm_gem_submit_bo submit_bo;
96 struct drm_gem_object *obj;
97 struct msm_gem_object *msm_obj;
98 void __user *userptr =
99 u64_to_user_ptr(args->bos + (i * sizeof(submit_bo)));
100
101 /* make sure we don't have garbage flags, in case we hit
102 * error path before flags is initialized:
103 */
104 submit->bos[i].flags = 0;
105
106 if (copy_from_user_inatomic(&submit_bo, userptr, sizeof(submit_bo))) {
107 pagefault_enable();
108 spin_unlock(&file->table_lock);
109 if (copy_from_user(&submit_bo, userptr, sizeof(submit_bo))) {
110 ret = -EFAULT;
111 goto out;
112 }
113 spin_lock(&file->table_lock);
114 pagefault_disable();
115 }
116
117 /* at least one of READ and/or WRITE flags should be set: */
118 #define MANDATORY_FLAGS (MSM_SUBMIT_BO_READ | MSM_SUBMIT_BO_WRITE)
119
120 if ((submit_bo.flags & ~MSM_SUBMIT_BO_FLAGS) ||
121 !(submit_bo.flags & MANDATORY_FLAGS)) {
122 DRM_ERROR("invalid flags: %x\n", submit_bo.flags);
123 ret = -EINVAL;
124 goto out_unlock;
125 }
126
127 submit->bos[i].flags = submit_bo.flags;
128 /* in validate_objects() we figure out if this is true: */
129 submit->bos[i].iova = submit_bo.presumed;
130
131 /* normally use drm_gem_object_lookup(), but for bulk lookup
132 * all under single table_lock just hit object_idr directly:
133 */
134 obj = idr_find(&file->object_idr, submit_bo.handle);
135 if (!obj) {
136 DRM_ERROR("invalid handle %u at index %u\n", submit_bo.handle, i);
137 ret = -EINVAL;
138 goto out_unlock;
139 }
140
141 msm_obj = to_msm_bo(obj);
142
143 if (!list_empty(&msm_obj->submit_entry)) {
144 DRM_ERROR("handle %u at index %u already on submit list\n",
145 submit_bo.handle, i);
146 ret = -EINVAL;
147 goto out_unlock;
148 }
149
150 drm_gem_object_get(obj);
151
152 submit->bos[i].obj = msm_obj;
153
154 list_add_tail(&msm_obj->submit_entry, &submit->bo_list);
155 }
156
157 out_unlock:
158 pagefault_enable();
159 spin_unlock(&file->table_lock);
160
161 out:
162 submit->nr_bos = i;
163
164 return ret;
165 }
166
167 static void submit_unlock_unpin_bo(struct msm_gem_submit *submit,
168 int i, bool backoff)
169 {
170 struct msm_gem_object *msm_obj = submit->bos[i].obj;
171
172 if (submit->bos[i].flags & BO_PINNED)
173 msm_gem_unpin_iova(&msm_obj->base, submit->gpu->aspace);
174
175 if (submit->bos[i].flags & BO_LOCKED)
176 ww_mutex_unlock(&msm_obj->resv->lock);
177
178 if (backoff && !(submit->bos[i].flags & BO_VALID))
179 submit->bos[i].iova = 0;
180
181 submit->bos[i].flags &= ~(BO_LOCKED | BO_PINNED);
182 }
183
184 /* This is where we make sure all the bo's are reserved and pin'd: */
185 static int submit_lock_objects(struct msm_gem_submit *submit)
186 {
187 int contended, slow_locked = -1, i, ret = 0;
188
189 retry:
190 for (i = 0; i < submit->nr_bos; i++) {
191 struct msm_gem_object *msm_obj = submit->bos[i].obj;
192
193 if (slow_locked == i)
194 slow_locked = -1;
195
196 contended = i;
197
198 if (!(submit->bos[i].flags & BO_LOCKED)) {
199 ret = ww_mutex_lock_interruptible(&msm_obj->resv->lock,
200 &submit->ticket);
201 if (ret)
202 goto fail;
203 submit->bos[i].flags |= BO_LOCKED;
204 }
205 }
206
207 ww_acquire_done(&submit->ticket);
208
209 return 0;
210
211 fail:
212 for (; i >= 0; i--)
213 submit_unlock_unpin_bo(submit, i, true);
214
215 if (slow_locked > 0)
216 submit_unlock_unpin_bo(submit, slow_locked, true);
217
218 if (ret == -EDEADLK) {
219 struct msm_gem_object *msm_obj = submit->bos[contended].obj;
220 /* we lost out in a seqno race, lock and retry.. */
221 ret = ww_mutex_lock_slow_interruptible(&msm_obj->resv->lock,
222 &submit->ticket);
223 if (!ret) {
224 submit->bos[contended].flags |= BO_LOCKED;
225 slow_locked = contended;
226 goto retry;
227 }
228 }
229
230 return ret;
231 }
232
233 static int submit_fence_sync(struct msm_gem_submit *submit, bool no_implicit)
234 {
235 int i, ret = 0;
236
237 for (i = 0; i < submit->nr_bos; i++) {
238 struct msm_gem_object *msm_obj = submit->bos[i].obj;
239 bool write = submit->bos[i].flags & MSM_SUBMIT_BO_WRITE;
240
241 if (!write) {
242 /* NOTE: _reserve_shared() must happen before
243 * _add_shared_fence(), which makes this a slightly
244 * strange place to call it. OTOH this is a
245 * convenient can-fail point to hook it in.
246 */
247 ret = reservation_object_reserve_shared(msm_obj->resv,
248 1);
249 if (ret)
250 return ret;
251 }
252
253 if (no_implicit)
254 continue;
255
256 ret = msm_gem_sync_object(&msm_obj->base, submit->ring->fctx,
257 write);
258 if (ret)
259 break;
260 }
261
262 return ret;
263 }
264
265 static int submit_pin_objects(struct msm_gem_submit *submit)
266 {
267 int i, ret = 0;
268
269 submit->valid = true;
270
271 for (i = 0; i < submit->nr_bos; i++) {
272 struct msm_gem_object *msm_obj = submit->bos[i].obj;
273 uint64_t iova;
274
275 /* if locking succeeded, pin bo: */
276 ret = msm_gem_get_and_pin_iova(&msm_obj->base,
277 submit->gpu->aspace, &iova);
278
279 if (ret)
280 break;
281
282 submit->bos[i].flags |= BO_PINNED;
283
284 if (iova == submit->bos[i].iova) {
285 submit->bos[i].flags |= BO_VALID;
286 } else {
287 submit->bos[i].iova = iova;
288 /* iova changed, so address in cmdstream is not valid: */
289 submit->bos[i].flags &= ~BO_VALID;
290 submit->valid = false;
291 }
292 }
293
294 return ret;
295 }
296
297 static int submit_bo(struct msm_gem_submit *submit, uint32_t idx,
298 struct msm_gem_object **obj, uint64_t *iova, bool *valid)
299 {
300 if (idx >= submit->nr_bos) {
301 DRM_ERROR("invalid buffer index: %u (out of %u)\n",
302 idx, submit->nr_bos);
303 return -EINVAL;
304 }
305
306 if (obj)
307 *obj = submit->bos[idx].obj;
308 if (iova)
309 *iova = submit->bos[idx].iova;
310 if (valid)
311 *valid = !!(submit->bos[idx].flags & BO_VALID);
312
313 return 0;
314 }
315
316 /* process the reloc's and patch up the cmdstream as needed: */
317 static int submit_reloc(struct msm_gem_submit *submit, struct msm_gem_object *obj,
318 uint32_t offset, uint32_t nr_relocs, uint64_t relocs)
319 {
320 uint32_t i, last_offset = 0;
321 uint32_t *ptr;
322 int ret = 0;
323
324 if (!nr_relocs)
325 return 0;
326
327 if (offset % 4) {
328 DRM_ERROR("non-aligned cmdstream buffer: %u\n", offset);
329 return -EINVAL;
330 }
331
332 /* For now, just map the entire thing. Eventually we probably
333 * to do it page-by-page, w/ kmap() if not vmap()d..
334 */
335 ptr = msm_gem_get_vaddr(&obj->base);
336
337 if (IS_ERR(ptr)) {
338 ret = PTR_ERR(ptr);
339 DBG("failed to map: %d", ret);
340 return ret;
341 }
342
343 for (i = 0; i < nr_relocs; i++) {
344 struct drm_msm_gem_submit_reloc submit_reloc;
345 void __user *userptr =
346 u64_to_user_ptr(relocs + (i * sizeof(submit_reloc)));
347 uint32_t off;
348 uint64_t iova;
349 bool valid;
350
351 if (copy_from_user(&submit_reloc, userptr, sizeof(submit_reloc))) {
352 ret = -EFAULT;
353 goto out;
354 }
355
356 if (submit_reloc.submit_offset % 4) {
357 DRM_ERROR("non-aligned reloc offset: %u\n",
358 submit_reloc.submit_offset);
359 ret = -EINVAL;
360 goto out;
361 }
362
363 /* offset in dwords: */
364 off = submit_reloc.submit_offset / 4;
365
366 if ((off >= (obj->base.size / 4)) ||
367 (off < last_offset)) {
368 DRM_ERROR("invalid offset %u at reloc %u\n", off, i);
369 ret = -EINVAL;
370 goto out;
371 }
372
373 ret = submit_bo(submit, submit_reloc.reloc_idx, NULL, &iova, &valid);
374 if (ret)
375 goto out;
376
377 if (valid)
378 continue;
379
380 iova += submit_reloc.reloc_offset;
381
382 if (submit_reloc.shift < 0)
383 iova >>= -submit_reloc.shift;
384 else
385 iova <<= submit_reloc.shift;
386
387 ptr[off] = iova | submit_reloc.or;
388
389 last_offset = off;
390 }
391
392 out:
393 msm_gem_put_vaddr(&obj->base);
394
395 return ret;
396 }
397
398 static void submit_cleanup(struct msm_gem_submit *submit)
399 {
400 unsigned i;
401
402 for (i = 0; i < submit->nr_bos; i++) {
403 struct msm_gem_object *msm_obj = submit->bos[i].obj;
404 submit_unlock_unpin_bo(submit, i, false);
405 list_del_init(&msm_obj->submit_entry);
406 drm_gem_object_put(&msm_obj->base);
407 }
408
409 ww_acquire_fini(&submit->ticket);
410 }
411
412 int msm_ioctl_gem_submit(struct drm_device *dev, void *data,
413 struct drm_file *file)
414 {
415 static atomic_t ident = ATOMIC_INIT(0);
416 struct msm_drm_private *priv = dev->dev_private;
417 struct drm_msm_gem_submit *args = data;
418 struct msm_file_private *ctx = file->driver_priv;
419 struct msm_gem_submit *submit;
420 struct msm_gpu *gpu = priv->gpu;
421 struct sync_file *sync_file = NULL;
422 struct msm_gpu_submitqueue *queue;
423 struct msm_ringbuffer *ring;
424 int out_fence_fd = -1;
425 struct pid *pid = get_pid(task_pid(current));
426 unsigned i;
427 int ret, submitid;
428 if (!gpu)
429 return -ENXIO;
430
431 /* for now, we just have 3d pipe.. eventually this would need to
432 * be more clever to dispatch to appropriate gpu module:
433 */
434 if (MSM_PIPE_ID(args->flags) != MSM_PIPE_3D0)
435 return -EINVAL;
436
437 if (MSM_PIPE_FLAGS(args->flags) & ~MSM_SUBMIT_FLAGS)
438 return -EINVAL;
439
440 if (args->flags & MSM_SUBMIT_SUDO) {
441 if (!IS_ENABLED(CONFIG_DRM_MSM_GPU_SUDO) ||
442 !capable(CAP_SYS_RAWIO))
443 return -EINVAL;
444 }
445
446 queue = msm_submitqueue_get(ctx, args->queueid);
447 if (!queue)
448 return -ENOENT;
449
450 /* Get a unique identifier for the submission for logging purposes */
451 submitid = atomic_inc_return(&ident) - 1;
452
453 ring = gpu->rb[queue->prio];
454 trace_msm_gpu_submit(pid_nr(pid), ring->id, submitid,
455 args->nr_bos, args->nr_cmds);
456
457 if (args->flags & MSM_SUBMIT_FENCE_FD_IN) {
458 struct dma_fence *in_fence;
459
460 in_fence = sync_file_get_fence(args->fence_fd);
461
462 if (!in_fence)
463 return -EINVAL;
464
465 /*
466 * Wait if the fence is from a foreign context, or if the fence
467 * array contains any fence from a foreign context.
468 */
469 ret = 0;
470 if (!dma_fence_match_context(in_fence, ring->fctx->context))
471 ret = dma_fence_wait(in_fence, true);
472
473 dma_fence_put(in_fence);
474 if (ret)
475 return ret;
476 }
477
478 ret = mutex_lock_interruptible(&dev->struct_mutex);
479 if (ret)
480 return ret;
481
482 if (args->flags & MSM_SUBMIT_FENCE_FD_OUT) {
483 out_fence_fd = get_unused_fd_flags(O_CLOEXEC);
484 if (out_fence_fd < 0) {
485 ret = out_fence_fd;
486 goto out_unlock;
487 }
488 }
489
490 submit = submit_create(dev, gpu, queue, args->nr_bos, args->nr_cmds);
491 if (!submit) {
492 ret = -ENOMEM;
493 goto out_unlock;
494 }
495
496 submit->pid = pid;
497 submit->ident = submitid;
498
499 if (args->flags & MSM_SUBMIT_SUDO)
500 submit->in_rb = true;
501
502 ret = submit_lookup_objects(submit, args, file);
503 if (ret)
504 goto out;
505
506 ret = submit_lock_objects(submit);
507 if (ret)
508 goto out;
509
510 ret = submit_fence_sync(submit, !!(args->flags & MSM_SUBMIT_NO_IMPLICIT));
511 if (ret)
512 goto out;
513
514 ret = submit_pin_objects(submit);
515 if (ret)
516 goto out;
517
518 for (i = 0; i < args->nr_cmds; i++) {
519 struct drm_msm_gem_submit_cmd submit_cmd;
520 void __user *userptr =
521 u64_to_user_ptr(args->cmds + (i * sizeof(submit_cmd)));
522 struct msm_gem_object *msm_obj;
523 uint64_t iova;
524
525 ret = copy_from_user(&submit_cmd, userptr, sizeof(submit_cmd));
526 if (ret) {
527 ret = -EFAULT;
528 goto out;
529 }
530
531 /* validate input from userspace: */
532 switch (submit_cmd.type) {
533 case MSM_SUBMIT_CMD_BUF:
534 case MSM_SUBMIT_CMD_IB_TARGET_BUF:
535 case MSM_SUBMIT_CMD_CTX_RESTORE_BUF:
536 break;
537 default:
538 DRM_ERROR("invalid type: %08x\n", submit_cmd.type);
539 ret = -EINVAL;
540 goto out;
541 }
542
543 ret = submit_bo(submit, submit_cmd.submit_idx,
544 &msm_obj, &iova, NULL);
545 if (ret)
546 goto out;
547
548 if (submit_cmd.size % 4) {
549 DRM_ERROR("non-aligned cmdstream buffer size: %u\n",
550 submit_cmd.size);
551 ret = -EINVAL;
552 goto out;
553 }
554
555 if (!submit_cmd.size ||
556 ((submit_cmd.size + submit_cmd.submit_offset) >
557 msm_obj->base.size)) {
558 DRM_ERROR("invalid cmdstream size: %u\n", submit_cmd.size);
559 ret = -EINVAL;
560 goto out;
561 }
562
563 submit->cmd[i].type = submit_cmd.type;
564 submit->cmd[i].size = submit_cmd.size / 4;
565 submit->cmd[i].iova = iova + submit_cmd.submit_offset;
566 submit->cmd[i].idx = submit_cmd.submit_idx;
567
568 if (submit->valid)
569 continue;
570
571 ret = submit_reloc(submit, msm_obj, submit_cmd.submit_offset,
572 submit_cmd.nr_relocs, submit_cmd.relocs);
573 if (ret)
574 goto out;
575 }
576
577 submit->nr_cmds = i;
578
579 submit->fence = msm_fence_alloc(ring->fctx);
580 if (IS_ERR(submit->fence)) {
581 ret = PTR_ERR(submit->fence);
582 submit->fence = NULL;
583 goto out;
584 }
585
586 if (args->flags & MSM_SUBMIT_FENCE_FD_OUT) {
587 sync_file = sync_file_create(submit->fence);
588 if (!sync_file) {
589 ret = -ENOMEM;
590 goto out;
591 }
592 }
593
594 msm_gpu_submit(gpu, submit, ctx);
595
596 args->fence = submit->fence->seqno;
597
598 if (args->flags & MSM_SUBMIT_FENCE_FD_OUT) {
599 fd_install(out_fence_fd, sync_file->file);
600 args->fence_fd = out_fence_fd;
601 }
602
603 out:
604 submit_cleanup(submit);
605 if (ret)
606 msm_gem_submit_free(submit);
607 out_unlock:
608 if (ret && (out_fence_fd >= 0))
609 put_unused_fd(out_fence_fd);
610 mutex_unlock(&dev->struct_mutex);
611 return ret;
612 }
Linux with added FPC-III support