1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Copyright (C) 2013 Red Hat
4 * Author: Rob Clark <robdclark@gmail.com>
5 */
6
7 #include <linux/file.h>
8 #include <linux/sync_file.h>
9 #include <linux/uaccess.h>
10
11 #include <drm/drm_drv.h>
12 #include <drm/drm_file.h>
13 #include <drm/drm_syncobj.h>
14
15 #include "msm_drv.h"
16 #include "msm_gpu.h"
17 #include "msm_gem.h"
18 #include "msm_gpu_trace.h"
19
20 /*
21 * Cmdstream submission:
22 */
23
submit_create(struct drm_device * dev,struct msm_gpu * gpu,struct msm_gpu_submitqueue * queue,uint32_t nr_bos,uint32_t nr_cmds)24 static struct msm_gem_submit *submit_create(struct drm_device *dev,
25 struct msm_gpu *gpu,
26 struct msm_gpu_submitqueue *queue, uint32_t nr_bos,
27 uint32_t nr_cmds)
28 {
29 static atomic_t ident = ATOMIC_INIT(0);
30 struct msm_gem_submit *submit;
31 uint64_t sz;
32 int ret;
33
34 sz = struct_size(submit, bos, nr_bos) +
35 ((u64)nr_cmds * sizeof(submit->cmd[0]));
36
37 if (sz > SIZE_MAX)
38 return ERR_PTR(-ENOMEM);
39
40 submit = kzalloc(sz, GFP_KERNEL);
41 if (!submit)
42 return ERR_PTR(-ENOMEM);
43
44 submit->hw_fence = msm_fence_alloc();
45 if (IS_ERR(submit->hw_fence)) {
46 ret = PTR_ERR(submit->hw_fence);
47 kfree(submit);
48 return ERR_PTR(ret);
49 }
50
51 ret = drm_sched_job_init(&submit->base, queue->entity, queue);
52 if (ret) {
53 kfree(submit->hw_fence);
54 kfree(submit);
55 return ERR_PTR(ret);
56 }
57
58 kref_init(&submit->ref);
59 submit->dev = dev;
60 submit->aspace = queue->ctx->aspace;
61 submit->gpu = gpu;
62 submit->cmd = (void *)&submit->bos[nr_bos];
63 submit->queue = queue;
64 submit->pid = get_pid(task_pid(current));
65 submit->ring = gpu->rb[queue->ring_nr];
66 submit->fault_dumped = false;
67
68 /* Get a unique identifier for the submission for logging purposes */
69 submit->ident = atomic_inc_return(&ident) - 1;
70
71 INIT_LIST_HEAD(&submit->node);
72
73 return submit;
74 }
75
__msm_gem_submit_destroy(struct kref * kref)76 void __msm_gem_submit_destroy(struct kref *kref)
77 {
78 struct msm_gem_submit *submit =
79 container_of(kref, struct msm_gem_submit, ref);
80 unsigned i;
81
82 if (submit->fence_id) {
83 spin_lock(&submit->queue->idr_lock);
84 idr_remove(&submit->queue->fence_idr, submit->fence_id);
85 spin_unlock(&submit->queue->idr_lock);
86 }
87
88 dma_fence_put(submit->user_fence);
89
90 /*
91 * If the submit is freed before msm_job_run(), then hw_fence is
92 * just some pre-allocated memory, not a reference counted fence.
93 * Once the job runs and the hw_fence is initialized, it will
94 * have a refcount of at least one, since the submit holds a ref
95 * to the hw_fence.
96 */
97 if (kref_read(&submit->hw_fence->refcount) == 0) {
98 kfree(submit->hw_fence);
99 } else {
100 dma_fence_put(submit->hw_fence);
101 }
102
103 put_pid(submit->pid);
104 msm_submitqueue_put(submit->queue);
105
106 for (i = 0; i < submit->nr_cmds; i++)
107 kfree(submit->cmd[i].relocs);
108
109 kfree(submit);
110 }
111
submit_lookup_objects(struct msm_gem_submit * submit,struct drm_msm_gem_submit * args,struct drm_file * file)112 static int submit_lookup_objects(struct msm_gem_submit *submit,
113 struct drm_msm_gem_submit *args, struct drm_file *file)
114 {
115 unsigned i;
116 int ret = 0;
117
118 for (i = 0; i < args->nr_bos; i++) {
119 struct drm_msm_gem_submit_bo submit_bo;
120 void __user *userptr =
121 u64_to_user_ptr(args->bos + (i * sizeof(submit_bo)));
122
123 /* make sure we don't have garbage flags, in case we hit
124 * error path before flags is initialized:
125 */
126 submit->bos[i].flags = 0;
127
128 if (copy_from_user(&submit_bo, userptr, sizeof(submit_bo))) {
129 ret = -EFAULT;
130 i = 0;
131 goto out;
132 }
133
134 /* at least one of READ and/or WRITE flags should be set: */
135 #define MANDATORY_FLAGS (MSM_SUBMIT_BO_READ | MSM_SUBMIT_BO_WRITE)
136
137 if ((submit_bo.flags & ~MSM_SUBMIT_BO_FLAGS) ||
138 !(submit_bo.flags & MANDATORY_FLAGS)) {
139 DRM_ERROR("invalid flags: %x\n", submit_bo.flags);
140 ret = -EINVAL;
141 i = 0;
142 goto out;
143 }
144
145 submit->bos[i].handle = submit_bo.handle;
146 submit->bos[i].flags = submit_bo.flags;
147 /* in validate_objects() we figure out if this is true: */
148 submit->bos[i].iova = submit_bo.presumed;
149 }
150
151 spin_lock(&file->table_lock);
152
153 for (i = 0; i < args->nr_bos; i++) {
154 struct drm_gem_object *obj;
155
156 /* normally use drm_gem_object_lookup(), but for bulk lookup
157 * all under single table_lock just hit object_idr directly:
158 */
159 obj = idr_find(&file->object_idr, submit->bos[i].handle);
160 if (!obj) {
161 DRM_ERROR("invalid handle %u at index %u\n", submit->bos[i].handle, i);
162 ret = -EINVAL;
163 goto out_unlock;
164 }
165
166 drm_gem_object_get(obj);
167
168 submit->bos[i].obj = obj;
169 }
170
171 out_unlock:
172 spin_unlock(&file->table_lock);
173
174 out:
175 submit->nr_bos = i;
176
177 return ret;
178 }
179
submit_lookup_cmds(struct msm_gem_submit * submit,struct drm_msm_gem_submit * args,struct drm_file * file)180 static int submit_lookup_cmds(struct msm_gem_submit *submit,
181 struct drm_msm_gem_submit *args, struct drm_file *file)
182 {
183 unsigned i;
184 size_t sz;
185 int ret = 0;
186
187 for (i = 0; i < args->nr_cmds; i++) {
188 struct drm_msm_gem_submit_cmd submit_cmd;
189 void __user *userptr =
190 u64_to_user_ptr(args->cmds + (i * sizeof(submit_cmd)));
191
192 ret = copy_from_user(&submit_cmd, userptr, sizeof(submit_cmd));
193 if (ret) {
194 ret = -EFAULT;
195 goto out;
196 }
197
198 /* validate input from userspace: */
199 switch (submit_cmd.type) {
200 case MSM_SUBMIT_CMD_BUF:
201 case MSM_SUBMIT_CMD_IB_TARGET_BUF:
202 case MSM_SUBMIT_CMD_CTX_RESTORE_BUF:
203 break;
204 default:
205 DRM_ERROR("invalid type: %08x\n", submit_cmd.type);
206 return -EINVAL;
207 }
208
209 if (submit_cmd.size % 4) {
210 DRM_ERROR("non-aligned cmdstream buffer size: %u\n",
211 submit_cmd.size);
212 ret = -EINVAL;
213 goto out;
214 }
215
216 submit->cmd[i].type = submit_cmd.type;
217 submit->cmd[i].size = submit_cmd.size / 4;
218 submit->cmd[i].offset = submit_cmd.submit_offset / 4;
219 submit->cmd[i].idx = submit_cmd.submit_idx;
220 submit->cmd[i].nr_relocs = submit_cmd.nr_relocs;
221
222 userptr = u64_to_user_ptr(submit_cmd.relocs);
223
224 sz = array_size(submit_cmd.nr_relocs,
225 sizeof(struct drm_msm_gem_submit_reloc));
226 /* check for overflow: */
227 if (sz == SIZE_MAX) {
228 ret = -ENOMEM;
229 goto out;
230 }
231 submit->cmd[i].relocs = kmalloc(sz, GFP_KERNEL);
232 if (!submit->cmd[i].relocs) {
233 ret = -ENOMEM;
234 goto out;
235 }
236 ret = copy_from_user(submit->cmd[i].relocs, userptr, sz);
237 if (ret) {
238 ret = -EFAULT;
239 goto out;
240 }
241 }
242
243 out:
244 return ret;
245 }
246
247 /* Unwind bo state, according to cleanup_flags. In the success case, only
248 * the lock is dropped at the end of the submit (and active/pin ref is dropped
249 * later when the submit is retired).
250 */
submit_cleanup_bo(struct msm_gem_submit * submit,int i,unsigned cleanup_flags)251 static void submit_cleanup_bo(struct msm_gem_submit *submit, int i,
252 unsigned cleanup_flags)
253 {
254 struct drm_gem_object *obj = submit->bos[i].obj;
255 unsigned flags = submit->bos[i].flags & cleanup_flags;
256
257 /*
258 * Clear flags bit before dropping lock, so that the msm_job_run()
259 * path isn't racing with submit_cleanup() (ie. the read/modify/
260 * write is protected by the obj lock in all paths)
261 */
262 submit->bos[i].flags &= ~cleanup_flags;
263
264 if (flags & BO_PINNED)
265 msm_gem_unpin_locked(obj);
266
267 if (flags & BO_LOCKED)
268 dma_resv_unlock(obj->resv);
269 }
270
submit_unlock_unpin_bo(struct msm_gem_submit * submit,int i)271 static void submit_unlock_unpin_bo(struct msm_gem_submit *submit, int i)
272 {
273 unsigned cleanup_flags = BO_PINNED | BO_LOCKED;
274 submit_cleanup_bo(submit, i, cleanup_flags);
275
276 if (!(submit->bos[i].flags & BO_VALID))
277 submit->bos[i].iova = 0;
278 }
279
280 /* This is where we make sure all the bo's are reserved and pin'd: */
submit_lock_objects(struct msm_gem_submit * submit)281 static int submit_lock_objects(struct msm_gem_submit *submit)
282 {
283 int contended, slow_locked = -1, i, ret = 0;
284
285 retry:
286 for (i = 0; i < submit->nr_bos; i++) {
287 struct drm_gem_object *obj = submit->bos[i].obj;
288
289 if (slow_locked == i)
290 slow_locked = -1;
291
292 contended = i;
293
294 if (!(submit->bos[i].flags & BO_LOCKED)) {
295 ret = dma_resv_lock_interruptible(obj->resv,
296 &submit->ticket);
297 if (ret)
298 goto fail;
299 submit->bos[i].flags |= BO_LOCKED;
300 }
301 }
302
303 ww_acquire_done(&submit->ticket);
304
305 return 0;
306
307 fail:
308 if (ret == -EALREADY) {
309 DRM_ERROR("handle %u at index %u already on submit list\n",
310 submit->bos[i].handle, i);
311 ret = -EINVAL;
312 }
313
314 for (; i >= 0; i--)
315 submit_unlock_unpin_bo(submit, i);
316
317 if (slow_locked > 0)
318 submit_unlock_unpin_bo(submit, slow_locked);
319
320 if (ret == -EDEADLK) {
321 struct drm_gem_object *obj = submit->bos[contended].obj;
322 /* we lost out in a seqno race, lock and retry.. */
323 ret = dma_resv_lock_slow_interruptible(obj->resv,
324 &submit->ticket);
325 if (!ret) {
326 submit->bos[contended].flags |= BO_LOCKED;
327 slow_locked = contended;
328 goto retry;
329 }
330
331 /* Not expecting -EALREADY here, if the bo was already
332 * locked, we should have gotten -EALREADY already from
333 * the dma_resv_lock_interruptable() call.
334 */
335 WARN_ON_ONCE(ret == -EALREADY);
336 }
337
338 return ret;
339 }
340
submit_fence_sync(struct msm_gem_submit * submit,bool no_implicit)341 static int submit_fence_sync(struct msm_gem_submit *submit, bool no_implicit)
342 {
343 int i, ret = 0;
344
345 for (i = 0; i < submit->nr_bos; i++) {
346 struct drm_gem_object *obj = submit->bos[i].obj;
347 bool write = submit->bos[i].flags & MSM_SUBMIT_BO_WRITE;
348
349 /* NOTE: _reserve_shared() must happen before
350 * _add_shared_fence(), which makes this a slightly
351 * strange place to call it. OTOH this is a
352 * convenient can-fail point to hook it in.
353 */
354 ret = dma_resv_reserve_fences(obj->resv, 1);
355 if (ret)
356 return ret;
357
358 /* If userspace has determined that explicit fencing is
359 * used, it can disable implicit sync on the entire
360 * submit:
361 */
362 if (no_implicit)
363 continue;
364
365 /* Otherwise userspace can ask for implicit sync to be
366 * disabled on specific buffers. This is useful for internal
367 * usermode driver managed buffers, suballocation, etc.
368 */
369 if (submit->bos[i].flags & MSM_SUBMIT_BO_NO_IMPLICIT)
370 continue;
371
372 ret = drm_sched_job_add_implicit_dependencies(&submit->base,
373 obj,
374 write);
375 if (ret)
376 break;
377 }
378
379 return ret;
380 }
381
submit_pin_objects(struct msm_gem_submit * submit)382 static int submit_pin_objects(struct msm_gem_submit *submit)
383 {
384 struct msm_drm_private *priv = submit->dev->dev_private;
385 int i, ret = 0;
386
387 submit->valid = true;
388
389 for (i = 0; i < submit->nr_bos; i++) {
390 struct drm_gem_object *obj = submit->bos[i].obj;
391 struct msm_gem_vma *vma;
392
393 /* if locking succeeded, pin bo: */
394 vma = msm_gem_get_vma_locked(obj, submit->aspace);
395 if (IS_ERR(vma)) {
396 ret = PTR_ERR(vma);
397 break;
398 }
399
400 ret = msm_gem_pin_vma_locked(obj, vma);
401 if (ret)
402 break;
403
404 if (vma->iova == submit->bos[i].iova) {
405 submit->bos[i].flags |= BO_VALID;
406 } else {
407 submit->bos[i].iova = vma->iova;
408 /* iova changed, so address in cmdstream is not valid: */
409 submit->bos[i].flags &= ~BO_VALID;
410 submit->valid = false;
411 }
412 }
413
414 /*
415 * A second loop while holding the LRU lock (a) avoids acquiring/dropping
416 * the LRU lock for each individual bo, while (b) avoiding holding the
417 * LRU lock while calling msm_gem_pin_vma_locked() (which could trigger
418 * get_pages() which could trigger reclaim.. and if we held the LRU lock
419 * could trigger deadlock with the shrinker).
420 */
421 mutex_lock(&priv->lru.lock);
422 for (i = 0; i < submit->nr_bos; i++) {
423 msm_gem_pin_obj_locked(submit->bos[i].obj);
424 submit->bos[i].flags |= BO_PINNED;
425 }
426 mutex_unlock(&priv->lru.lock);
427
428 return ret;
429 }
430
submit_attach_object_fences(struct msm_gem_submit * submit)431 static void submit_attach_object_fences(struct msm_gem_submit *submit)
432 {
433 int i;
434
435 for (i = 0; i < submit->nr_bos; i++) {
436 struct drm_gem_object *obj = submit->bos[i].obj;
437
438 if (submit->bos[i].flags & MSM_SUBMIT_BO_WRITE)
439 dma_resv_add_fence(obj->resv, submit->user_fence,
440 DMA_RESV_USAGE_WRITE);
441 else if (submit->bos[i].flags & MSM_SUBMIT_BO_READ)
442 dma_resv_add_fence(obj->resv, submit->user_fence,
443 DMA_RESV_USAGE_READ);
444 }
445 }
446
submit_bo(struct msm_gem_submit * submit,uint32_t idx,struct drm_gem_object ** obj,uint64_t * iova,bool * valid)447 static int submit_bo(struct msm_gem_submit *submit, uint32_t idx,
448 struct drm_gem_object **obj, uint64_t *iova, bool *valid)
449 {
450 if (idx >= submit->nr_bos) {
451 DRM_ERROR("invalid buffer index: %u (out of %u)\n",
452 idx, submit->nr_bos);
453 return -EINVAL;
454 }
455
456 if (obj)
457 *obj = submit->bos[idx].obj;
458 if (iova)
459 *iova = submit->bos[idx].iova;
460 if (valid)
461 *valid = !!(submit->bos[idx].flags & BO_VALID);
462
463 return 0;
464 }
465
466 /* process the reloc's and patch up the cmdstream as needed: */
submit_reloc(struct msm_gem_submit * submit,struct drm_gem_object * obj,uint32_t offset,uint32_t nr_relocs,struct drm_msm_gem_submit_reloc * relocs)467 static int submit_reloc(struct msm_gem_submit *submit, struct drm_gem_object *obj,
468 uint32_t offset, uint32_t nr_relocs, struct drm_msm_gem_submit_reloc *relocs)
469 {
470 uint32_t i, last_offset = 0;
471 uint32_t *ptr;
472 int ret = 0;
473
474 if (!nr_relocs)
475 return 0;
476
477 if (offset % 4) {
478 DRM_ERROR("non-aligned cmdstream buffer: %u\n", offset);
479 return -EINVAL;
480 }
481
482 /* For now, just map the entire thing. Eventually we probably
483 * to do it page-by-page, w/ kmap() if not vmap()d..
484 */
485 ptr = msm_gem_get_vaddr_locked(obj);
486
487 if (IS_ERR(ptr)) {
488 ret = PTR_ERR(ptr);
489 DBG("failed to map: %d", ret);
490 return ret;
491 }
492
493 for (i = 0; i < nr_relocs; i++) {
494 struct drm_msm_gem_submit_reloc submit_reloc = relocs[i];
495 uint32_t off;
496 uint64_t iova;
497 bool valid;
498
499 if (submit_reloc.submit_offset % 4) {
500 DRM_ERROR("non-aligned reloc offset: %u\n",
501 submit_reloc.submit_offset);
502 ret = -EINVAL;
503 goto out;
504 }
505
506 /* offset in dwords: */
507 off = submit_reloc.submit_offset / 4;
508
509 if ((off >= (obj->size / 4)) ||
510 (off < last_offset)) {
511 DRM_ERROR("invalid offset %u at reloc %u\n", off, i);
512 ret = -EINVAL;
513 goto out;
514 }
515
516 ret = submit_bo(submit, submit_reloc.reloc_idx, NULL, &iova, &valid);
517 if (ret)
518 goto out;
519
520 if (valid)
521 continue;
522
523 iova += submit_reloc.reloc_offset;
524
525 if (submit_reloc.shift < 0)
526 iova >>= -submit_reloc.shift;
527 else
528 iova <<= submit_reloc.shift;
529
530 ptr[off] = iova | submit_reloc.or;
531
532 last_offset = off;
533 }
534
535 out:
536 msm_gem_put_vaddr_locked(obj);
537
538 return ret;
539 }
540
541 /* Cleanup submit at end of ioctl. In the error case, this also drops
542 * references, unpins, and drops active refcnt. In the non-error case,
543 * this is done when the submit is retired.
544 */
submit_cleanup(struct msm_gem_submit * submit,bool error)545 static void submit_cleanup(struct msm_gem_submit *submit, bool error)
546 {
547 unsigned cleanup_flags = BO_LOCKED;
548 unsigned i;
549
550 if (error)
551 cleanup_flags |= BO_PINNED;
552
553 for (i = 0; i < submit->nr_bos; i++) {
554 struct drm_gem_object *obj = submit->bos[i].obj;
555 submit_cleanup_bo(submit, i, cleanup_flags);
556 if (error)
557 drm_gem_object_put(obj);
558 }
559 }
560
msm_submit_retire(struct msm_gem_submit * submit)561 void msm_submit_retire(struct msm_gem_submit *submit)
562 {
563 int i;
564
565 for (i = 0; i < submit->nr_bos; i++) {
566 struct drm_gem_object *obj = submit->bos[i].obj;
567
568 drm_gem_object_put(obj);
569 }
570 }
571
572 struct msm_submit_post_dep {
573 struct drm_syncobj *syncobj;
574 uint64_t point;
575 struct dma_fence_chain *chain;
576 };
577
msm_parse_deps(struct msm_gem_submit * submit,struct drm_file * file,uint64_t in_syncobjs_addr,uint32_t nr_in_syncobjs,size_t syncobj_stride)578 static struct drm_syncobj **msm_parse_deps(struct msm_gem_submit *submit,
579 struct drm_file *file,
580 uint64_t in_syncobjs_addr,
581 uint32_t nr_in_syncobjs,
582 size_t syncobj_stride)
583 {
584 struct drm_syncobj **syncobjs = NULL;
585 struct drm_msm_gem_submit_syncobj syncobj_desc = {0};
586 int ret = 0;
587 uint32_t i, j;
588
589 syncobjs = kcalloc(nr_in_syncobjs, sizeof(*syncobjs),
590 GFP_KERNEL | __GFP_NOWARN | __GFP_NORETRY);
591 if (!syncobjs)
592 return ERR_PTR(-ENOMEM);
593
594 for (i = 0; i < nr_in_syncobjs; ++i) {
595 uint64_t address = in_syncobjs_addr + i * syncobj_stride;
596
597 if (copy_from_user(&syncobj_desc,
598 u64_to_user_ptr(address),
599 min(syncobj_stride, sizeof(syncobj_desc)))) {
600 ret = -EFAULT;
601 break;
602 }
603
604 if (syncobj_desc.point &&
605 !drm_core_check_feature(submit->dev, DRIVER_SYNCOBJ_TIMELINE)) {
606 ret = -EOPNOTSUPP;
607 break;
608 }
609
610 if (syncobj_desc.flags & ~MSM_SUBMIT_SYNCOBJ_FLAGS) {
611 ret = -EINVAL;
612 break;
613 }
614
615 ret = drm_sched_job_add_syncobj_dependency(&submit->base, file,
616 syncobj_desc.handle, syncobj_desc.point);
617 if (ret)
618 break;
619
620 if (syncobj_desc.flags & MSM_SUBMIT_SYNCOBJ_RESET) {
621 syncobjs[i] =
622 drm_syncobj_find(file, syncobj_desc.handle);
623 if (!syncobjs[i]) {
624 ret = -EINVAL;
625 break;
626 }
627 }
628 }
629
630 if (ret) {
631 for (j = 0; j <= i; ++j) {
632 if (syncobjs[j])
633 drm_syncobj_put(syncobjs[j]);
634 }
635 kfree(syncobjs);
636 return ERR_PTR(ret);
637 }
638 return syncobjs;
639 }
640
msm_reset_syncobjs(struct drm_syncobj ** syncobjs,uint32_t nr_syncobjs)641 static void msm_reset_syncobjs(struct drm_syncobj **syncobjs,
642 uint32_t nr_syncobjs)
643 {
644 uint32_t i;
645
646 for (i = 0; syncobjs && i < nr_syncobjs; ++i) {
647 if (syncobjs[i])
648 drm_syncobj_replace_fence(syncobjs[i], NULL);
649 }
650 }
651
msm_parse_post_deps(struct drm_device * dev,struct drm_file * file,uint64_t syncobjs_addr,uint32_t nr_syncobjs,size_t syncobj_stride)652 static struct msm_submit_post_dep *msm_parse_post_deps(struct drm_device *dev,
653 struct drm_file *file,
654 uint64_t syncobjs_addr,
655 uint32_t nr_syncobjs,
656 size_t syncobj_stride)
657 {
658 struct msm_submit_post_dep *post_deps;
659 struct drm_msm_gem_submit_syncobj syncobj_desc = {0};
660 int ret = 0;
661 uint32_t i, j;
662
663 post_deps = kcalloc(nr_syncobjs, sizeof(*post_deps),
664 GFP_KERNEL | __GFP_NOWARN | __GFP_NORETRY);
665 if (!post_deps)
666 return ERR_PTR(-ENOMEM);
667
668 for (i = 0; i < nr_syncobjs; ++i) {
669 uint64_t address = syncobjs_addr + i * syncobj_stride;
670
671 if (copy_from_user(&syncobj_desc,
672 u64_to_user_ptr(address),
673 min(syncobj_stride, sizeof(syncobj_desc)))) {
674 ret = -EFAULT;
675 break;
676 }
677
678 post_deps[i].point = syncobj_desc.point;
679
680 if (syncobj_desc.flags) {
681 ret = -EINVAL;
682 break;
683 }
684
685 if (syncobj_desc.point) {
686 if (!drm_core_check_feature(dev,
687 DRIVER_SYNCOBJ_TIMELINE)) {
688 ret = -EOPNOTSUPP;
689 break;
690 }
691
692 post_deps[i].chain = dma_fence_chain_alloc();
693 if (!post_deps[i].chain) {
694 ret = -ENOMEM;
695 break;
696 }
697 }
698
699 post_deps[i].syncobj =
700 drm_syncobj_find(file, syncobj_desc.handle);
701 if (!post_deps[i].syncobj) {
702 ret = -EINVAL;
703 break;
704 }
705 }
706
707 if (ret) {
708 for (j = 0; j <= i; ++j) {
709 dma_fence_chain_free(post_deps[j].chain);
710 if (post_deps[j].syncobj)
711 drm_syncobj_put(post_deps[j].syncobj);
712 }
713
714 kfree(post_deps);
715 return ERR_PTR(ret);
716 }
717
718 return post_deps;
719 }
720
msm_process_post_deps(struct msm_submit_post_dep * post_deps,uint32_t count,struct dma_fence * fence)721 static void msm_process_post_deps(struct msm_submit_post_dep *post_deps,
722 uint32_t count, struct dma_fence *fence)
723 {
724 uint32_t i;
725
726 for (i = 0; post_deps && i < count; ++i) {
727 if (post_deps[i].chain) {
728 drm_syncobj_add_point(post_deps[i].syncobj,
729 post_deps[i].chain,
730 fence, post_deps[i].point);
731 post_deps[i].chain = NULL;
732 } else {
733 drm_syncobj_replace_fence(post_deps[i].syncobj,
734 fence);
735 }
736 }
737 }
738
msm_ioctl_gem_submit(struct drm_device * dev,void * data,struct drm_file * file)739 int msm_ioctl_gem_submit(struct drm_device *dev, void *data,
740 struct drm_file *file)
741 {
742 struct msm_drm_private *priv = dev->dev_private;
743 struct drm_msm_gem_submit *args = data;
744 struct msm_file_private *ctx = file->driver_priv;
745 struct msm_gem_submit *submit = NULL;
746 struct msm_gpu *gpu = priv->gpu;
747 struct msm_gpu_submitqueue *queue;
748 struct msm_ringbuffer *ring;
749 struct msm_submit_post_dep *post_deps = NULL;
750 struct drm_syncobj **syncobjs_to_reset = NULL;
751 int out_fence_fd = -1;
752 bool has_ww_ticket = false;
753 unsigned i;
754 int ret;
755
756 if (!gpu)
757 return -ENXIO;
758
759 if (args->pad)
760 return -EINVAL;
761
762 if (unlikely(!ctx->aspace) && !capable(CAP_SYS_RAWIO)) {
763 DRM_ERROR_RATELIMITED("IOMMU support or CAP_SYS_RAWIO required!\n");
764 return -EPERM;
765 }
766
767 /* for now, we just have 3d pipe.. eventually this would need to
768 * be more clever to dispatch to appropriate gpu module:
769 */
770 if (MSM_PIPE_ID(args->flags) != MSM_PIPE_3D0)
771 return -EINVAL;
772
773 if (MSM_PIPE_FLAGS(args->flags) & ~MSM_SUBMIT_FLAGS)
774 return -EINVAL;
775
776 if (args->flags & MSM_SUBMIT_SUDO) {
777 if (!IS_ENABLED(CONFIG_DRM_MSM_GPU_SUDO) ||
778 !capable(CAP_SYS_RAWIO))
779 return -EINVAL;
780 }
781
782 queue = msm_submitqueue_get(ctx, args->queueid);
783 if (!queue)
784 return -ENOENT;
785
786 ring = gpu->rb[queue->ring_nr];
787
788 if (args->flags & MSM_SUBMIT_FENCE_FD_OUT) {
789 out_fence_fd = get_unused_fd_flags(O_CLOEXEC);
790 if (out_fence_fd < 0) {
791 ret = out_fence_fd;
792 goto out_post_unlock;
793 }
794 }
795
796 submit = submit_create(dev, gpu, queue, args->nr_bos, args->nr_cmds);
797 if (IS_ERR(submit)) {
798 ret = PTR_ERR(submit);
799 goto out_post_unlock;
800 }
801
802 trace_msm_gpu_submit(pid_nr(submit->pid), ring->id, submit->ident,
803 args->nr_bos, args->nr_cmds);
804
805 ret = mutex_lock_interruptible(&queue->lock);
806 if (ret)
807 goto out_post_unlock;
808
809 if (args->flags & MSM_SUBMIT_SUDO)
810 submit->in_rb = true;
811
812 if (args->flags & MSM_SUBMIT_FENCE_FD_IN) {
813 struct dma_fence *in_fence;
814
815 in_fence = sync_file_get_fence(args->fence_fd);
816
817 if (!in_fence) {
818 ret = -EINVAL;
819 goto out_unlock;
820 }
821
822 ret = drm_sched_job_add_dependency(&submit->base, in_fence);
823 if (ret)
824 goto out_unlock;
825 }
826
827 if (args->flags & MSM_SUBMIT_SYNCOBJ_IN) {
828 syncobjs_to_reset = msm_parse_deps(submit, file,
829 args->in_syncobjs,
830 args->nr_in_syncobjs,
831 args->syncobj_stride);
832 if (IS_ERR(syncobjs_to_reset)) {
833 ret = PTR_ERR(syncobjs_to_reset);
834 goto out_unlock;
835 }
836 }
837
838 if (args->flags & MSM_SUBMIT_SYNCOBJ_OUT) {
839 post_deps = msm_parse_post_deps(dev, file,
840 args->out_syncobjs,
841 args->nr_out_syncobjs,
842 args->syncobj_stride);
843 if (IS_ERR(post_deps)) {
844 ret = PTR_ERR(post_deps);
845 goto out_unlock;
846 }
847 }
848
849 ret = submit_lookup_objects(submit, args, file);
850 if (ret)
851 goto out;
852
853 ret = submit_lookup_cmds(submit, args, file);
854 if (ret)
855 goto out;
856
857 /* copy_*_user while holding a ww ticket upsets lockdep */
858 ww_acquire_init(&submit->ticket, &reservation_ww_class);
859 has_ww_ticket = true;
860 ret = submit_lock_objects(submit);
861 if (ret)
862 goto out;
863
864 ret = submit_fence_sync(submit, !!(args->flags & MSM_SUBMIT_NO_IMPLICIT));
865 if (ret)
866 goto out;
867
868 ret = submit_pin_objects(submit);
869 if (ret)
870 goto out;
871
872 for (i = 0; i < args->nr_cmds; i++) {
873 struct drm_gem_object *obj;
874 uint64_t iova;
875
876 ret = submit_bo(submit, submit->cmd[i].idx,
877 &obj, &iova, NULL);
878 if (ret)
879 goto out;
880
881 if (!submit->cmd[i].size ||
882 ((submit->cmd[i].size + submit->cmd[i].offset) >
883 obj->size / 4)) {
884 DRM_ERROR("invalid cmdstream size: %u\n", submit->cmd[i].size * 4);
885 ret = -EINVAL;
886 goto out;
887 }
888
889 submit->cmd[i].iova = iova + (submit->cmd[i].offset * 4);
890
891 if (submit->valid)
892 continue;
893
894 if (!gpu->allow_relocs) {
895 if (submit->cmd[i].nr_relocs) {
896 DRM_ERROR("relocs not allowed\n");
897 ret = -EINVAL;
898 goto out;
899 }
900
901 continue;
902 }
903
904 ret = submit_reloc(submit, obj, submit->cmd[i].offset * 4,
905 submit->cmd[i].nr_relocs, submit->cmd[i].relocs);
906 if (ret)
907 goto out;
908 }
909
910 submit->nr_cmds = i;
911
912 idr_preload(GFP_KERNEL);
913
914 spin_lock(&queue->idr_lock);
915
916 /*
917 * If using userspace provided seqno fence, validate that the id
918 * is available before arming sched job. Since access to fence_idr
919 * is serialized on the queue lock, the slot should be still avail
920 * after the job is armed
921 */
922 if ((args->flags & MSM_SUBMIT_FENCE_SN_IN) &&
923 (!args->fence || idr_find(&queue->fence_idr, args->fence))) {
924 spin_unlock(&queue->idr_lock);
925 idr_preload_end();
926 ret = -EINVAL;
927 goto out;
928 }
929
930 drm_sched_job_arm(&submit->base);
931
932 submit->user_fence = dma_fence_get(&submit->base.s_fence->finished);
933
934 if (args->flags & MSM_SUBMIT_FENCE_SN_IN) {
935 /*
936 * Userspace has assigned the seqno fence that it wants
937 * us to use. It is an error to pick a fence sequence
938 * number that is not available.
939 */
940 submit->fence_id = args->fence;
941 ret = idr_alloc_u32(&queue->fence_idr, submit->user_fence,
942 &submit->fence_id, submit->fence_id,
943 GFP_NOWAIT);
944 /*
945 * We've already validated that the fence_id slot is valid,
946 * so if idr_alloc_u32 failed, it is a kernel bug
947 */
948 WARN_ON(ret);
949 } else {
950 /*
951 * Allocate an id which can be used by WAIT_FENCE ioctl to map
952 * back to the underlying fence.
953 */
954 submit->fence_id = idr_alloc_cyclic(&queue->fence_idr,
955 submit->user_fence, 1,
956 INT_MAX, GFP_NOWAIT);
957 }
958
959 spin_unlock(&queue->idr_lock);
960 idr_preload_end();
961
962 if (submit->fence_id < 0) {
963 ret = submit->fence_id;
964 submit->fence_id = 0;
965 }
966
967 if (ret == 0 && args->flags & MSM_SUBMIT_FENCE_FD_OUT) {
968 struct sync_file *sync_file = sync_file_create(submit->user_fence);
969 if (!sync_file) {
970 ret = -ENOMEM;
971 } else {
972 fd_install(out_fence_fd, sync_file->file);
973 args->fence_fd = out_fence_fd;
974 }
975 }
976
977 submit_attach_object_fences(submit);
978
979 /* The scheduler owns a ref now: */
980 msm_gem_submit_get(submit);
981
982 msm_rd_dump_submit(priv->rd, submit, NULL);
983
984 drm_sched_entity_push_job(&submit->base);
985
986 args->fence = submit->fence_id;
987 queue->last_fence = submit->fence_id;
988
989 msm_reset_syncobjs(syncobjs_to_reset, args->nr_in_syncobjs);
990 msm_process_post_deps(post_deps, args->nr_out_syncobjs,
991 submit->user_fence);
992
993
994 out:
995 submit_cleanup(submit, !!ret);
996 if (has_ww_ticket)
997 ww_acquire_fini(&submit->ticket);
998 out_unlock:
999 mutex_unlock(&queue->lock);
1000 out_post_unlock:
1001 if (ret && (out_fence_fd >= 0))
1002 put_unused_fd(out_fence_fd);
1003
1004 if (!IS_ERR_OR_NULL(submit)) {
1005 msm_gem_submit_put(submit);
1006 } else {
1007 /*
1008 * If the submit hasn't yet taken ownership of the queue
1009 * then we need to drop the reference ourself:
1010 */
1011 msm_submitqueue_put(queue);
1012 }
1013 if (!IS_ERR_OR_NULL(post_deps)) {
1014 for (i = 0; i < args->nr_out_syncobjs; ++i) {
1015 kfree(post_deps[i].chain);
1016 drm_syncobj_put(post_deps[i].syncobj);
1017 }
1018 kfree(post_deps);
1019 }
1020
1021 if (!IS_ERR_OR_NULL(syncobjs_to_reset)) {
1022 for (i = 0; i < args->nr_in_syncobjs; ++i) {
1023 if (syncobjs_to_reset[i])
1024 drm_syncobj_put(syncobjs_to_reset[i]);
1025 }
1026 kfree(syncobjs_to_reset);
1027 }
1028
1029 return ret;
1030 }
1031