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
24 /* make sure these don't conflict w/ MSM_SUBMIT_BO_x */
25 #define BO_VALID 0x8000 /* is current addr in cmdstream correct/valid? */
26 #define BO_LOCKED 0x4000
27 #define BO_PINNED 0x2000
28
submit_create(struct drm_device * dev,struct msm_gpu * gpu,struct msm_gpu_submitqueue * queue,uint32_t nr_bos,uint32_t nr_cmds)29 static struct msm_gem_submit *submit_create(struct drm_device *dev,
30 struct msm_gpu *gpu,
31 struct msm_gpu_submitqueue *queue, uint32_t nr_bos,
32 uint32_t nr_cmds)
33 {
34 struct msm_gem_submit *submit;
35 uint64_t sz = struct_size(submit, bos, nr_bos) +
36 ((u64)nr_cmds * sizeof(submit->cmd[0]));
37
38 if (sz > SIZE_MAX)
39 return NULL;
40
41 submit = kmalloc(sz, GFP_KERNEL | __GFP_NOWARN | __GFP_NORETRY);
42 if (!submit)
43 return NULL;
44
45 kref_init(&submit->ref);
46 submit->dev = dev;
47 submit->aspace = queue->ctx->aspace;
48 submit->gpu = gpu;
49 submit->fence = NULL;
50 submit->cmd = (void *)&submit->bos[nr_bos];
51 submit->queue = queue;
52 submit->ring = gpu->rb[queue->prio];
53
54 /* initially, until copy_from_user() and bo lookup succeeds: */
55 submit->nr_bos = 0;
56 submit->nr_cmds = 0;
57
58 INIT_LIST_HEAD(&submit->node);
59 INIT_LIST_HEAD(&submit->bo_list);
60
61 return submit;
62 }
63
__msm_gem_submit_destroy(struct kref * kref)64 void __msm_gem_submit_destroy(struct kref *kref)
65 {
66 struct msm_gem_submit *submit =
67 container_of(kref, struct msm_gem_submit, ref);
68 unsigned i;
69
70 dma_fence_put(submit->fence);
71 put_pid(submit->pid);
72 msm_submitqueue_put(submit->queue);
73
74 for (i = 0; i < submit->nr_cmds; i++)
75 kfree(submit->cmd[i].relocs);
76
77 kfree(submit);
78 }
79
submit_lookup_objects(struct msm_gem_submit * submit,struct drm_msm_gem_submit * args,struct drm_file * file)80 static int submit_lookup_objects(struct msm_gem_submit *submit,
81 struct drm_msm_gem_submit *args, struct drm_file *file)
82 {
83 unsigned i;
84 int ret = 0;
85
86 for (i = 0; i < args->nr_bos; i++) {
87 struct drm_msm_gem_submit_bo submit_bo;
88 void __user *userptr =
89 u64_to_user_ptr(args->bos + (i * sizeof(submit_bo)));
90
91 /* make sure we don't have garbage flags, in case we hit
92 * error path before flags is initialized:
93 */
94 submit->bos[i].flags = 0;
95
96 if (copy_from_user(&submit_bo, userptr, sizeof(submit_bo))) {
97 ret = -EFAULT;
98 i = 0;
99 goto out;
100 }
101
102 /* at least one of READ and/or WRITE flags should be set: */
103 #define MANDATORY_FLAGS (MSM_SUBMIT_BO_READ | MSM_SUBMIT_BO_WRITE)
104
105 if ((submit_bo.flags & ~MSM_SUBMIT_BO_FLAGS) ||
106 !(submit_bo.flags & MANDATORY_FLAGS)) {
107 DRM_ERROR("invalid flags: %x\n", submit_bo.flags);
108 ret = -EINVAL;
109 i = 0;
110 goto out;
111 }
112
113 submit->bos[i].handle = submit_bo.handle;
114 submit->bos[i].flags = submit_bo.flags;
115 /* in validate_objects() we figure out if this is true: */
116 submit->bos[i].iova = submit_bo.presumed;
117 }
118
119 spin_lock(&file->table_lock);
120
121 for (i = 0; i < args->nr_bos; i++) {
122 struct drm_gem_object *obj;
123 struct msm_gem_object *msm_obj;
124
125 /* normally use drm_gem_object_lookup(), but for bulk lookup
126 * all under single table_lock just hit object_idr directly:
127 */
128 obj = idr_find(&file->object_idr, submit->bos[i].handle);
129 if (!obj) {
130 DRM_ERROR("invalid handle %u at index %u\n", submit->bos[i].handle, i);
131 ret = -EINVAL;
132 goto out_unlock;
133 }
134
135 msm_obj = to_msm_bo(obj);
136
137 if (!list_empty(&msm_obj->submit_entry)) {
138 DRM_ERROR("handle %u at index %u already on submit list\n",
139 submit->bos[i].handle, i);
140 ret = -EINVAL;
141 goto out_unlock;
142 }
143
144 drm_gem_object_get(obj);
145
146 submit->bos[i].obj = msm_obj;
147
148 list_add_tail(&msm_obj->submit_entry, &submit->bo_list);
149 }
150
151 out_unlock:
152 spin_unlock(&file->table_lock);
153
154 out:
155 submit->nr_bos = i;
156
157 return ret;
158 }
159
submit_lookup_cmds(struct msm_gem_submit * submit,struct drm_msm_gem_submit * args,struct drm_file * file)160 static int submit_lookup_cmds(struct msm_gem_submit *submit,
161 struct drm_msm_gem_submit *args, struct drm_file *file)
162 {
163 unsigned i, sz;
164 int ret = 0;
165
166 for (i = 0; i < args->nr_cmds; i++) {
167 struct drm_msm_gem_submit_cmd submit_cmd;
168 void __user *userptr =
169 u64_to_user_ptr(args->cmds + (i * sizeof(submit_cmd)));
170
171 ret = copy_from_user(&submit_cmd, userptr, sizeof(submit_cmd));
172 if (ret) {
173 ret = -EFAULT;
174 goto out;
175 }
176
177 /* validate input from userspace: */
178 switch (submit_cmd.type) {
179 case MSM_SUBMIT_CMD_BUF:
180 case MSM_SUBMIT_CMD_IB_TARGET_BUF:
181 case MSM_SUBMIT_CMD_CTX_RESTORE_BUF:
182 break;
183 default:
184 DRM_ERROR("invalid type: %08x\n", submit_cmd.type);
185 return -EINVAL;
186 }
187
188 if (submit_cmd.size % 4) {
189 DRM_ERROR("non-aligned cmdstream buffer size: %u\n",
190 submit_cmd.size);
191 ret = -EINVAL;
192 goto out;
193 }
194
195 submit->cmd[i].type = submit_cmd.type;
196 submit->cmd[i].size = submit_cmd.size / 4;
197 submit->cmd[i].offset = submit_cmd.submit_offset / 4;
198 submit->cmd[i].idx = submit_cmd.submit_idx;
199 submit->cmd[i].nr_relocs = submit_cmd.nr_relocs;
200
201 userptr = u64_to_user_ptr(submit_cmd.relocs);
202
203 sz = array_size(submit_cmd.nr_relocs,
204 sizeof(struct drm_msm_gem_submit_reloc));
205 /* check for overflow: */
206 if (sz == SIZE_MAX) {
207 ret = -ENOMEM;
208 goto out;
209 }
210 submit->cmd[i].relocs = kmalloc(sz, GFP_KERNEL);
211 ret = copy_from_user(submit->cmd[i].relocs, userptr, sz);
212 if (ret) {
213 ret = -EFAULT;
214 goto out;
215 }
216 }
217
218 out:
219 return ret;
220 }
221
submit_unlock_unpin_bo(struct msm_gem_submit * submit,int i,bool backoff)222 static void submit_unlock_unpin_bo(struct msm_gem_submit *submit,
223 int i, bool backoff)
224 {
225 struct msm_gem_object *msm_obj = submit->bos[i].obj;
226
227 if (submit->bos[i].flags & BO_PINNED)
228 msm_gem_unpin_iova_locked(&msm_obj->base, submit->aspace);
229
230 if (submit->bos[i].flags & BO_LOCKED)
231 dma_resv_unlock(msm_obj->base.resv);
232
233 if (backoff && !(submit->bos[i].flags & BO_VALID))
234 submit->bos[i].iova = 0;
235
236 submit->bos[i].flags &= ~(BO_LOCKED | BO_PINNED);
237 }
238
239 /* This is where we make sure all the bo's are reserved and pin'd: */
submit_lock_objects(struct msm_gem_submit * submit)240 static int submit_lock_objects(struct msm_gem_submit *submit)
241 {
242 int contended, slow_locked = -1, i, ret = 0;
243
244 retry:
245 for (i = 0; i < submit->nr_bos; i++) {
246 struct msm_gem_object *msm_obj = submit->bos[i].obj;
247
248 if (slow_locked == i)
249 slow_locked = -1;
250
251 contended = i;
252
253 if (!(submit->bos[i].flags & BO_LOCKED)) {
254 ret = dma_resv_lock_interruptible(msm_obj->base.resv,
255 &submit->ticket);
256 if (ret)
257 goto fail;
258 submit->bos[i].flags |= BO_LOCKED;
259 }
260 }
261
262 ww_acquire_done(&submit->ticket);
263
264 return 0;
265
266 fail:
267 for (; i >= 0; i--)
268 submit_unlock_unpin_bo(submit, i, true);
269
270 if (slow_locked > 0)
271 submit_unlock_unpin_bo(submit, slow_locked, true);
272
273 if (ret == -EDEADLK) {
274 struct msm_gem_object *msm_obj = submit->bos[contended].obj;
275 /* we lost out in a seqno race, lock and retry.. */
276 ret = dma_resv_lock_slow_interruptible(msm_obj->base.resv,
277 &submit->ticket);
278 if (!ret) {
279 submit->bos[contended].flags |= BO_LOCKED;
280 slow_locked = contended;
281 goto retry;
282 }
283 }
284
285 return ret;
286 }
287
submit_fence_sync(struct msm_gem_submit * submit,bool no_implicit)288 static int submit_fence_sync(struct msm_gem_submit *submit, bool no_implicit)
289 {
290 int i, ret = 0;
291
292 for (i = 0; i < submit->nr_bos; i++) {
293 struct msm_gem_object *msm_obj = submit->bos[i].obj;
294 bool write = submit->bos[i].flags & MSM_SUBMIT_BO_WRITE;
295
296 if (!write) {
297 /* NOTE: _reserve_shared() must happen before
298 * _add_shared_fence(), which makes this a slightly
299 * strange place to call it. OTOH this is a
300 * convenient can-fail point to hook it in.
301 */
302 ret = dma_resv_reserve_shared(msm_obj->base.resv,
303 1);
304 if (ret)
305 return ret;
306 }
307
308 if (no_implicit)
309 continue;
310
311 ret = msm_gem_sync_object(&msm_obj->base, submit->ring->fctx,
312 write);
313 if (ret)
314 break;
315 }
316
317 return ret;
318 }
319
submit_pin_objects(struct msm_gem_submit * submit)320 static int submit_pin_objects(struct msm_gem_submit *submit)
321 {
322 int i, ret = 0;
323
324 submit->valid = true;
325
326 for (i = 0; i < submit->nr_bos; i++) {
327 struct msm_gem_object *msm_obj = submit->bos[i].obj;
328 uint64_t iova;
329
330 /* if locking succeeded, pin bo: */
331 ret = msm_gem_get_and_pin_iova_locked(&msm_obj->base,
332 submit->aspace, &iova);
333
334 if (ret)
335 break;
336
337 submit->bos[i].flags |= BO_PINNED;
338
339 if (iova == submit->bos[i].iova) {
340 submit->bos[i].flags |= BO_VALID;
341 } else {
342 submit->bos[i].iova = iova;
343 /* iova changed, so address in cmdstream is not valid: */
344 submit->bos[i].flags &= ~BO_VALID;
345 submit->valid = false;
346 }
347 }
348
349 return ret;
350 }
351
submit_bo(struct msm_gem_submit * submit,uint32_t idx,struct msm_gem_object ** obj,uint64_t * iova,bool * valid)352 static int submit_bo(struct msm_gem_submit *submit, uint32_t idx,
353 struct msm_gem_object **obj, uint64_t *iova, bool *valid)
354 {
355 if (idx >= submit->nr_bos) {
356 DRM_ERROR("invalid buffer index: %u (out of %u)\n",
357 idx, submit->nr_bos);
358 return -EINVAL;
359 }
360
361 if (obj)
362 *obj = submit->bos[idx].obj;
363 if (iova)
364 *iova = submit->bos[idx].iova;
365 if (valid)
366 *valid = !!(submit->bos[idx].flags & BO_VALID);
367
368 return 0;
369 }
370
371 /* process the reloc's and patch up the cmdstream as needed: */
submit_reloc(struct msm_gem_submit * submit,struct msm_gem_object * obj,uint32_t offset,uint32_t nr_relocs,struct drm_msm_gem_submit_reloc * relocs)372 static int submit_reloc(struct msm_gem_submit *submit, struct msm_gem_object *obj,
373 uint32_t offset, uint32_t nr_relocs, struct drm_msm_gem_submit_reloc *relocs)
374 {
375 uint32_t i, last_offset = 0;
376 uint32_t *ptr;
377 int ret = 0;
378
379 if (!nr_relocs)
380 return 0;
381
382 if (offset % 4) {
383 DRM_ERROR("non-aligned cmdstream buffer: %u\n", offset);
384 return -EINVAL;
385 }
386
387 /* For now, just map the entire thing. Eventually we probably
388 * to do it page-by-page, w/ kmap() if not vmap()d..
389 */
390 ptr = msm_gem_get_vaddr_locked(&obj->base);
391
392 if (IS_ERR(ptr)) {
393 ret = PTR_ERR(ptr);
394 DBG("failed to map: %d", ret);
395 return ret;
396 }
397
398 for (i = 0; i < nr_relocs; i++) {
399 struct drm_msm_gem_submit_reloc submit_reloc = relocs[i];
400 uint32_t off;
401 uint64_t iova;
402 bool valid;
403
404 if (submit_reloc.submit_offset % 4) {
405 DRM_ERROR("non-aligned reloc offset: %u\n",
406 submit_reloc.submit_offset);
407 ret = -EINVAL;
408 goto out;
409 }
410
411 /* offset in dwords: */
412 off = submit_reloc.submit_offset / 4;
413
414 if ((off >= (obj->base.size / 4)) ||
415 (off < last_offset)) {
416 DRM_ERROR("invalid offset %u at reloc %u\n", off, i);
417 ret = -EINVAL;
418 goto out;
419 }
420
421 ret = submit_bo(submit, submit_reloc.reloc_idx, NULL, &iova, &valid);
422 if (ret)
423 goto out;
424
425 if (valid)
426 continue;
427
428 iova += submit_reloc.reloc_offset;
429
430 if (submit_reloc.shift < 0)
431 iova >>= -submit_reloc.shift;
432 else
433 iova <<= submit_reloc.shift;
434
435 ptr[off] = iova | submit_reloc.or;
436
437 last_offset = off;
438 }
439
440 out:
441 msm_gem_put_vaddr_locked(&obj->base);
442
443 return ret;
444 }
445
submit_cleanup(struct msm_gem_submit * submit)446 static void submit_cleanup(struct msm_gem_submit *submit)
447 {
448 unsigned i;
449
450 for (i = 0; i < submit->nr_bos; i++) {
451 struct msm_gem_object *msm_obj = submit->bos[i].obj;
452 submit_unlock_unpin_bo(submit, i, false);
453 list_del_init(&msm_obj->submit_entry);
454 drm_gem_object_put_locked(&msm_obj->base);
455 }
456 }
457
458
459 struct msm_submit_post_dep {
460 struct drm_syncobj *syncobj;
461 uint64_t point;
462 struct dma_fence_chain *chain;
463 };
464
msm_wait_deps(struct drm_device * dev,struct drm_file * file,uint64_t in_syncobjs_addr,uint32_t nr_in_syncobjs,size_t syncobj_stride,struct msm_ringbuffer * ring)465 static struct drm_syncobj **msm_wait_deps(struct drm_device *dev,
466 struct drm_file *file,
467 uint64_t in_syncobjs_addr,
468 uint32_t nr_in_syncobjs,
469 size_t syncobj_stride,
470 struct msm_ringbuffer *ring)
471 {
472 struct drm_syncobj **syncobjs = NULL;
473 struct drm_msm_gem_submit_syncobj syncobj_desc = {0};
474 int ret = 0;
475 uint32_t i, j;
476
477 syncobjs = kcalloc(nr_in_syncobjs, sizeof(*syncobjs),
478 GFP_KERNEL | __GFP_NOWARN | __GFP_NORETRY);
479 if (!syncobjs)
480 return ERR_PTR(-ENOMEM);
481
482 for (i = 0; i < nr_in_syncobjs; ++i) {
483 uint64_t address = in_syncobjs_addr + i * syncobj_stride;
484 struct dma_fence *fence;
485
486 if (copy_from_user(&syncobj_desc,
487 u64_to_user_ptr(address),
488 min(syncobj_stride, sizeof(syncobj_desc)))) {
489 ret = -EFAULT;
490 break;
491 }
492
493 if (syncobj_desc.point &&
494 !drm_core_check_feature(dev, DRIVER_SYNCOBJ_TIMELINE)) {
495 ret = -EOPNOTSUPP;
496 break;
497 }
498
499 if (syncobj_desc.flags & ~MSM_SUBMIT_SYNCOBJ_FLAGS) {
500 ret = -EINVAL;
501 break;
502 }
503
504 ret = drm_syncobj_find_fence(file, syncobj_desc.handle,
505 syncobj_desc.point, 0, &fence);
506 if (ret)
507 break;
508
509 if (!dma_fence_match_context(fence, ring->fctx->context))
510 ret = dma_fence_wait(fence, true);
511
512 dma_fence_put(fence);
513 if (ret)
514 break;
515
516 if (syncobj_desc.flags & MSM_SUBMIT_SYNCOBJ_RESET) {
517 syncobjs[i] =
518 drm_syncobj_find(file, syncobj_desc.handle);
519 if (!syncobjs[i]) {
520 ret = -EINVAL;
521 break;
522 }
523 }
524 }
525
526 if (ret) {
527 for (j = 0; j <= i; ++j) {
528 if (syncobjs[j])
529 drm_syncobj_put(syncobjs[j]);
530 }
531 kfree(syncobjs);
532 return ERR_PTR(ret);
533 }
534 return syncobjs;
535 }
536
msm_reset_syncobjs(struct drm_syncobj ** syncobjs,uint32_t nr_syncobjs)537 static void msm_reset_syncobjs(struct drm_syncobj **syncobjs,
538 uint32_t nr_syncobjs)
539 {
540 uint32_t i;
541
542 for (i = 0; syncobjs && i < nr_syncobjs; ++i) {
543 if (syncobjs[i])
544 drm_syncobj_replace_fence(syncobjs[i], NULL);
545 }
546 }
547
msm_parse_post_deps(struct drm_device * dev,struct drm_file * file,uint64_t syncobjs_addr,uint32_t nr_syncobjs,size_t syncobj_stride)548 static struct msm_submit_post_dep *msm_parse_post_deps(struct drm_device *dev,
549 struct drm_file *file,
550 uint64_t syncobjs_addr,
551 uint32_t nr_syncobjs,
552 size_t syncobj_stride)
553 {
554 struct msm_submit_post_dep *post_deps;
555 struct drm_msm_gem_submit_syncobj syncobj_desc = {0};
556 int ret = 0;
557 uint32_t i, j;
558
559 post_deps = kmalloc_array(nr_syncobjs, sizeof(*post_deps),
560 GFP_KERNEL | __GFP_NOWARN | __GFP_NORETRY);
561 if (!post_deps)
562 return ERR_PTR(-ENOMEM);
563
564 for (i = 0; i < nr_syncobjs; ++i) {
565 uint64_t address = syncobjs_addr + i * syncobj_stride;
566
567 if (copy_from_user(&syncobj_desc,
568 u64_to_user_ptr(address),
569 min(syncobj_stride, sizeof(syncobj_desc)))) {
570 ret = -EFAULT;
571 break;
572 }
573
574 post_deps[i].point = syncobj_desc.point;
575 post_deps[i].chain = NULL;
576
577 if (syncobj_desc.flags) {
578 ret = -EINVAL;
579 break;
580 }
581
582 if (syncobj_desc.point) {
583 if (!drm_core_check_feature(dev,
584 DRIVER_SYNCOBJ_TIMELINE)) {
585 ret = -EOPNOTSUPP;
586 break;
587 }
588
589 post_deps[i].chain =
590 kmalloc(sizeof(*post_deps[i].chain),
591 GFP_KERNEL);
592 if (!post_deps[i].chain) {
593 ret = -ENOMEM;
594 break;
595 }
596 }
597
598 post_deps[i].syncobj =
599 drm_syncobj_find(file, syncobj_desc.handle);
600 if (!post_deps[i].syncobj) {
601 ret = -EINVAL;
602 break;
603 }
604 }
605
606 if (ret) {
607 for (j = 0; j <= i; ++j) {
608 kfree(post_deps[j].chain);
609 if (post_deps[j].syncobj)
610 drm_syncobj_put(post_deps[j].syncobj);
611 }
612
613 kfree(post_deps);
614 return ERR_PTR(ret);
615 }
616
617 return post_deps;
618 }
619
msm_process_post_deps(struct msm_submit_post_dep * post_deps,uint32_t count,struct dma_fence * fence)620 static void msm_process_post_deps(struct msm_submit_post_dep *post_deps,
621 uint32_t count, struct dma_fence *fence)
622 {
623 uint32_t i;
624
625 for (i = 0; post_deps && i < count; ++i) {
626 if (post_deps[i].chain) {
627 drm_syncobj_add_point(post_deps[i].syncobj,
628 post_deps[i].chain,
629 fence, post_deps[i].point);
630 post_deps[i].chain = NULL;
631 } else {
632 drm_syncobj_replace_fence(post_deps[i].syncobj,
633 fence);
634 }
635 }
636 }
637
msm_ioctl_gem_submit(struct drm_device * dev,void * data,struct drm_file * file)638 int msm_ioctl_gem_submit(struct drm_device *dev, void *data,
639 struct drm_file *file)
640 {
641 static atomic_t ident = ATOMIC_INIT(0);
642 struct msm_drm_private *priv = dev->dev_private;
643 struct drm_msm_gem_submit *args = data;
644 struct msm_file_private *ctx = file->driver_priv;
645 struct msm_gem_submit *submit;
646 struct msm_gpu *gpu = priv->gpu;
647 struct sync_file *sync_file = NULL;
648 struct msm_gpu_submitqueue *queue;
649 struct msm_ringbuffer *ring;
650 struct msm_submit_post_dep *post_deps = NULL;
651 struct drm_syncobj **syncobjs_to_reset = NULL;
652 int out_fence_fd = -1;
653 struct pid *pid = get_pid(task_pid(current));
654 bool has_ww_ticket = false;
655 unsigned i;
656 int ret, submitid;
657 if (!gpu)
658 return -ENXIO;
659
660 if (args->pad)
661 return -EINVAL;
662
663 /* for now, we just have 3d pipe.. eventually this would need to
664 * be more clever to dispatch to appropriate gpu module:
665 */
666 if (MSM_PIPE_ID(args->flags) != MSM_PIPE_3D0)
667 return -EINVAL;
668
669 if (MSM_PIPE_FLAGS(args->flags) & ~MSM_SUBMIT_FLAGS)
670 return -EINVAL;
671
672 if (args->flags & MSM_SUBMIT_SUDO) {
673 if (!IS_ENABLED(CONFIG_DRM_MSM_GPU_SUDO) ||
674 !capable(CAP_SYS_RAWIO))
675 return -EINVAL;
676 }
677
678 queue = msm_submitqueue_get(ctx, args->queueid);
679 if (!queue)
680 return -ENOENT;
681
682 /* Get a unique identifier for the submission for logging purposes */
683 submitid = atomic_inc_return(&ident) - 1;
684
685 ring = gpu->rb[queue->prio];
686 trace_msm_gpu_submit(pid_nr(pid), ring->id, submitid,
687 args->nr_bos, args->nr_cmds);
688
689 if (args->flags & MSM_SUBMIT_FENCE_FD_IN) {
690 struct dma_fence *in_fence;
691
692 in_fence = sync_file_get_fence(args->fence_fd);
693
694 if (!in_fence)
695 return -EINVAL;
696
697 /*
698 * Wait if the fence is from a foreign context, or if the fence
699 * array contains any fence from a foreign context.
700 */
701 ret = 0;
702 if (!dma_fence_match_context(in_fence, ring->fctx->context))
703 ret = dma_fence_wait(in_fence, true);
704
705 dma_fence_put(in_fence);
706 if (ret)
707 return ret;
708 }
709
710 if (args->flags & MSM_SUBMIT_SYNCOBJ_IN) {
711 syncobjs_to_reset = msm_wait_deps(dev, file,
712 args->in_syncobjs,
713 args->nr_in_syncobjs,
714 args->syncobj_stride, ring);
715 if (IS_ERR(syncobjs_to_reset))
716 return PTR_ERR(syncobjs_to_reset);
717 }
718
719 if (args->flags & MSM_SUBMIT_SYNCOBJ_OUT) {
720 post_deps = msm_parse_post_deps(dev, file,
721 args->out_syncobjs,
722 args->nr_out_syncobjs,
723 args->syncobj_stride);
724 if (IS_ERR(post_deps)) {
725 ret = PTR_ERR(post_deps);
726 goto out_post_unlock;
727 }
728 }
729
730 ret = mutex_lock_interruptible(&dev->struct_mutex);
731 if (ret)
732 goto out_post_unlock;
733
734 if (args->flags & MSM_SUBMIT_FENCE_FD_OUT) {
735 out_fence_fd = get_unused_fd_flags(O_CLOEXEC);
736 if (out_fence_fd < 0) {
737 ret = out_fence_fd;
738 goto out_unlock;
739 }
740 }
741
742 submit = submit_create(dev, gpu, queue, args->nr_bos,
743 args->nr_cmds);
744 if (!submit) {
745 ret = -ENOMEM;
746 goto out_unlock;
747 }
748
749 submit->pid = pid;
750 submit->ident = submitid;
751
752 if (args->flags & MSM_SUBMIT_SUDO)
753 submit->in_rb = true;
754
755 ret = submit_lookup_objects(submit, args, file);
756 if (ret)
757 goto out_pre_pm;
758
759 ret = submit_lookup_cmds(submit, args, file);
760 if (ret)
761 goto out_pre_pm;
762
763 /*
764 * Thanks to dev_pm_opp opp_table_lock interactions with mm->mmap_sem
765 * in the resume path, we need to to rpm get before we lock objs.
766 * Which unfortunately might involve powering up the GPU sooner than
767 * is necessary. But at least in the explicit fencing case, we will
768 * have already done all the fence waiting.
769 */
770 pm_runtime_get_sync(&gpu->pdev->dev);
771
772 /* copy_*_user while holding a ww ticket upsets lockdep */
773 ww_acquire_init(&submit->ticket, &reservation_ww_class);
774 has_ww_ticket = true;
775 ret = submit_lock_objects(submit);
776 if (ret)
777 goto out;
778
779 ret = submit_fence_sync(submit, !!(args->flags & MSM_SUBMIT_NO_IMPLICIT));
780 if (ret)
781 goto out;
782
783 ret = submit_pin_objects(submit);
784 if (ret)
785 goto out;
786
787 for (i = 0; i < args->nr_cmds; i++) {
788 struct msm_gem_object *msm_obj;
789 uint64_t iova;
790
791 ret = submit_bo(submit, submit->cmd[i].idx,
792 &msm_obj, &iova, NULL);
793 if (ret)
794 goto out;
795
796 if (!submit->cmd[i].size ||
797 ((submit->cmd[i].size + submit->cmd[i].offset) >
798 msm_obj->base.size / 4)) {
799 DRM_ERROR("invalid cmdstream size: %u\n", submit->cmd[i].size * 4);
800 ret = -EINVAL;
801 goto out;
802 }
803
804 submit->cmd[i].iova = iova + (submit->cmd[i].offset * 4);
805
806 if (submit->valid)
807 continue;
808
809 ret = submit_reloc(submit, msm_obj, submit->cmd[i].offset * 4,
810 submit->cmd[i].nr_relocs, submit->cmd[i].relocs);
811 if (ret)
812 goto out;
813 }
814
815 submit->nr_cmds = i;
816
817 submit->fence = msm_fence_alloc(ring->fctx);
818 if (IS_ERR(submit->fence)) {
819 ret = PTR_ERR(submit->fence);
820 submit->fence = NULL;
821 goto out;
822 }
823
824 if (args->flags & MSM_SUBMIT_FENCE_FD_OUT) {
825 sync_file = sync_file_create(submit->fence);
826 if (!sync_file) {
827 ret = -ENOMEM;
828 goto out;
829 }
830 }
831
832 msm_gpu_submit(gpu, submit);
833
834 args->fence = submit->fence->seqno;
835
836 if (args->flags & MSM_SUBMIT_FENCE_FD_OUT) {
837 fd_install(out_fence_fd, sync_file->file);
838 args->fence_fd = out_fence_fd;
839 }
840
841 msm_reset_syncobjs(syncobjs_to_reset, args->nr_in_syncobjs);
842 msm_process_post_deps(post_deps, args->nr_out_syncobjs,
843 submit->fence);
844
845
846 out:
847 pm_runtime_put(&gpu->pdev->dev);
848 out_pre_pm:
849 submit_cleanup(submit);
850 if (has_ww_ticket)
851 ww_acquire_fini(&submit->ticket);
852 msm_gem_submit_put(submit);
853 out_unlock:
854 if (ret && (out_fence_fd >= 0))
855 put_unused_fd(out_fence_fd);
856 mutex_unlock(&dev->struct_mutex);
857
858 out_post_unlock:
859 if (!IS_ERR_OR_NULL(post_deps)) {
860 for (i = 0; i < args->nr_out_syncobjs; ++i) {
861 kfree(post_deps[i].chain);
862 drm_syncobj_put(post_deps[i].syncobj);
863 }
864 kfree(post_deps);
865 }
866
867 if (!IS_ERR_OR_NULL(syncobjs_to_reset)) {
868 for (i = 0; i < args->nr_in_syncobjs; ++i) {
869 if (syncobjs_to_reset[i])
870 drm_syncobj_put(syncobjs_to_reset[i]);
871 }
872 kfree(syncobjs_to_reset);
873 }
874
875 return ret;
876 }
877