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