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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (C) 2015 Etnaviv Project
4 */
5
6#include <drm/drm_file.h>
7#include <linux/dma-fence-array.h>
8#include <linux/file.h>
9#include <linux/pm_runtime.h>
10#include <linux/dma-resv.h>
11#include <linux/sync_file.h>
12#include <linux/uaccess.h>
13#include <linux/vmalloc.h>
14
15#include "etnaviv_cmdbuf.h"
16#include "etnaviv_drv.h"
17#include "etnaviv_gpu.h"
18#include "etnaviv_gem.h"
19#include "etnaviv_perfmon.h"
20#include "etnaviv_sched.h"
21
22/*
23 * Cmdstream submission:
24 */
25
26#define BO_INVALID_FLAGS ~(ETNA_SUBMIT_BO_READ | ETNA_SUBMIT_BO_WRITE)
27/* make sure these don't conflict w/ ETNAVIV_SUBMIT_BO_x */
28#define BO_LOCKED 0x4000
29#define BO_PINNED 0x2000
30
31static struct etnaviv_gem_submit *submit_create(struct drm_device *dev,
32 struct etnaviv_gpu *gpu, size_t nr_bos, size_t nr_pmrs)
33{
34 struct etnaviv_gem_submit *submit;
35 size_t sz = size_vstruct(nr_bos, sizeof(submit->bos[0]), sizeof(*submit));
36
37 submit = kzalloc(sz, GFP_KERNEL);
38 if (!submit)
39 return NULL;
40
41 submit->pmrs = kcalloc(nr_pmrs, sizeof(struct etnaviv_perfmon_request),
42 GFP_KERNEL);
43 if (!submit->pmrs) {
44 kfree(submit);
45 return NULL;
46 }
47 submit->nr_pmrs = nr_pmrs;
48
49 submit->gpu = gpu;
50 kref_init(&submit->refcount);
51
52 return submit;
53}
54
55static int submit_lookup_objects(struct etnaviv_gem_submit *submit,
56 struct drm_file *file, struct drm_etnaviv_gem_submit_bo *submit_bos,
57 unsigned nr_bos)
58{
59 struct drm_etnaviv_gem_submit_bo *bo;
60 unsigned i;
61 int ret = 0;
62
63 spin_lock(&file->table_lock);
64
65 for (i = 0, bo = submit_bos; i < nr_bos; i++, bo++) {
66 struct drm_gem_object *obj;
67
68 if (bo->flags & BO_INVALID_FLAGS) {
69 DRM_ERROR("invalid flags: %x\n", bo->flags);
70 ret = -EINVAL;
71 goto out_unlock;
72 }
73
74 submit->bos[i].flags = bo->flags;
75 if (submit->flags & ETNA_SUBMIT_SOFTPIN) {
76 if (bo->presumed < ETNAVIV_SOFTPIN_START_ADDRESS) {
77 DRM_ERROR("invalid softpin address\n");
78 ret = -EINVAL;
79 goto out_unlock;
80 }
81 submit->bos[i].va = bo->presumed;
82 }
83
84 /* normally use drm_gem_object_lookup(), but for bulk lookup
85 * all under single table_lock just hit object_idr directly:
86 */
87 obj = idr_find(&file->object_idr, bo->handle);
88 if (!obj) {
89 DRM_ERROR("invalid handle %u at index %u\n",
90 bo->handle, i);
91 ret = -EINVAL;
92 goto out_unlock;
93 }
94
95 /*
96 * Take a refcount on the object. The file table lock
97 * prevents the object_idr's refcount on this being dropped.
98 */
99 drm_gem_object_get(obj);
100
101 submit->bos[i].obj = to_etnaviv_bo(obj);
102 }
103
104out_unlock:
105 submit->nr_bos = i;
106 spin_unlock(&file->table_lock);
107
108 return ret;
109}
110
111static void submit_unlock_object(struct etnaviv_gem_submit *submit, int i)
112{
113 if (submit->bos[i].flags & BO_LOCKED) {
114 struct drm_gem_object *obj = &submit->bos[i].obj->base;
115
116 ww_mutex_unlock(&obj->resv->lock);
117 submit->bos[i].flags &= ~BO_LOCKED;
118 }
119}
120
121static int submit_lock_objects(struct etnaviv_gem_submit *submit,
122 struct ww_acquire_ctx *ticket)
123{
124 int contended, slow_locked = -1, i, ret = 0;
125
126retry:
127 for (i = 0; i < submit->nr_bos; i++) {
128 struct drm_gem_object *obj = &submit->bos[i].obj->base;
129
130 if (slow_locked == i)
131 slow_locked = -1;
132
133 contended = i;
134
135 if (!(submit->bos[i].flags & BO_LOCKED)) {
136 ret = ww_mutex_lock_interruptible(&obj->resv->lock,
137 ticket);
138 if (ret == -EALREADY)
139 DRM_ERROR("BO at index %u already on submit list\n",
140 i);
141 if (ret)
142 goto fail;
143 submit->bos[i].flags |= BO_LOCKED;
144 }
145 }
146
147 ww_acquire_done(ticket);
148
149 return 0;
150
151fail:
152 for (; i >= 0; i--)
153 submit_unlock_object(submit, i);
154
155 if (slow_locked > 0)
156 submit_unlock_object(submit, slow_locked);
157
158 if (ret == -EDEADLK) {
159 struct drm_gem_object *obj;
160
161 obj = &submit->bos[contended].obj->base;
162
163 /* we lost out in a seqno race, lock and retry.. */
164 ret = ww_mutex_lock_slow_interruptible(&obj->resv->lock,
165 ticket);
166 if (!ret) {
167 submit->bos[contended].flags |= BO_LOCKED;
168 slow_locked = contended;
169 goto retry;
170 }
171 }
172
173 return ret;
174}
175
176static int submit_fence_sync(struct etnaviv_gem_submit *submit)
177{
178 int i, ret = 0;
179
180 for (i = 0; i < submit->nr_bos; i++) {
181 struct etnaviv_gem_submit_bo *bo = &submit->bos[i];
182 struct dma_resv *robj = bo->obj->base.resv;
183
184 if (!(bo->flags & ETNA_SUBMIT_BO_WRITE)) {
185 ret = dma_resv_reserve_shared(robj, 1);
186 if (ret)
187 return ret;
188 }
189
190 if (submit->flags & ETNA_SUBMIT_NO_IMPLICIT)
191 continue;
192
193 if (bo->flags & ETNA_SUBMIT_BO_WRITE) {
194 ret = dma_resv_get_fences_rcu(robj, &bo->excl,
195 &bo->nr_shared,
196 &bo->shared);
197 if (ret)
198 return ret;
199 } else {
200 bo->excl = dma_resv_get_excl_rcu(robj);
201 }
202
203 }
204
205 return ret;
206}
207
208static void submit_attach_object_fences(struct etnaviv_gem_submit *submit)
209{
210 int i;
211
212 for (i = 0; i < submit->nr_bos; i++) {
213 struct drm_gem_object *obj = &submit->bos[i].obj->base;
214
215 if (submit->bos[i].flags & ETNA_SUBMIT_BO_WRITE)
216 dma_resv_add_excl_fence(obj->resv,
217 submit->out_fence);
218 else
219 dma_resv_add_shared_fence(obj->resv,
220 submit->out_fence);
221
222 submit_unlock_object(submit, i);
223 }
224}
225
226static int submit_pin_objects(struct etnaviv_gem_submit *submit)
227{
228 int i, ret = 0;
229
230 for (i = 0; i < submit->nr_bos; i++) {
231 struct etnaviv_gem_object *etnaviv_obj = submit->bos[i].obj;
232 struct etnaviv_vram_mapping *mapping;
233
234 mapping = etnaviv_gem_mapping_get(&etnaviv_obj->base,
235 submit->mmu_context,
236 submit->bos[i].va);
237 if (IS_ERR(mapping)) {
238 ret = PTR_ERR(mapping);
239 break;
240 }
241
242 if ((submit->flags & ETNA_SUBMIT_SOFTPIN) &&
243 submit->bos[i].va != mapping->iova)
244 return -EINVAL;
245
246 atomic_inc(&etnaviv_obj->gpu_active);
247
248 submit->bos[i].flags |= BO_PINNED;
249 submit->bos[i].mapping = mapping;
250 }
251
252 return ret;
253}
254
255static int submit_bo(struct etnaviv_gem_submit *submit, u32 idx,
256 struct etnaviv_gem_submit_bo **bo)
257{
258 if (idx >= submit->nr_bos) {
259 DRM_ERROR("invalid buffer index: %u (out of %u)\n",
260 idx, submit->nr_bos);
261 return -EINVAL;
262 }
263
264 *bo = &submit->bos[idx];
265
266 return 0;
267}
268
269/* process the reloc's and patch up the cmdstream as needed: */
270static int submit_reloc(struct etnaviv_gem_submit *submit, void *stream,
271 u32 size, const struct drm_etnaviv_gem_submit_reloc *relocs,
272 u32 nr_relocs)
273{
274 u32 i, last_offset = 0;
275 u32 *ptr = stream;
276 int ret;
277
278 /* Submits using softpin don't blend with relocs */
279 if ((submit->flags & ETNA_SUBMIT_SOFTPIN) && nr_relocs != 0)
280 return -EINVAL;
281
282 for (i = 0; i < nr_relocs; i++) {
283 const struct drm_etnaviv_gem_submit_reloc *r = relocs + i;
284 struct etnaviv_gem_submit_bo *bo;
285 u32 off;
286
287 if (unlikely(r->flags)) {
288 DRM_ERROR("invalid reloc flags\n");
289 return -EINVAL;
290 }
291
292 if (r->submit_offset % 4) {
293 DRM_ERROR("non-aligned reloc offset: %u\n",
294 r->submit_offset);
295 return -EINVAL;
296 }
297
298 /* offset in dwords: */
299 off = r->submit_offset / 4;
300
301 if ((off >= size ) ||
302 (off < last_offset)) {
303 DRM_ERROR("invalid offset %u at reloc %u\n", off, i);
304 return -EINVAL;
305 }
306
307 ret = submit_bo(submit, r->reloc_idx, &bo);
308 if (ret)
309 return ret;
310
311 if (r->reloc_offset > bo->obj->base.size - sizeof(*ptr)) {
312 DRM_ERROR("relocation %u outside object\n", i);
313 return -EINVAL;
314 }
315
316 ptr[off] = bo->mapping->iova + r->reloc_offset;
317
318 last_offset = off;
319 }
320
321 return 0;
322}
323
324static int submit_perfmon_validate(struct etnaviv_gem_submit *submit,
325 u32 exec_state, const struct drm_etnaviv_gem_submit_pmr *pmrs)
326{
327 u32 i;
328
329 for (i = 0; i < submit->nr_pmrs; i++) {
330 const struct drm_etnaviv_gem_submit_pmr *r = pmrs + i;
331 struct etnaviv_gem_submit_bo *bo;
332 int ret;
333
334 ret = submit_bo(submit, r->read_idx, &bo);
335 if (ret)
336 return ret;
337
338 /* at offset 0 a sequence number gets stored used for userspace sync */
339 if (r->read_offset == 0) {
340 DRM_ERROR("perfmon request: offset is 0");
341 return -EINVAL;
342 }
343
344 if (r->read_offset >= bo->obj->base.size - sizeof(u32)) {
345 DRM_ERROR("perfmon request: offset %u outside object", i);
346 return -EINVAL;
347 }
348
349 if (r->flags & ~(ETNA_PM_PROCESS_PRE | ETNA_PM_PROCESS_POST)) {
350 DRM_ERROR("perfmon request: flags are not valid");
351 return -EINVAL;
352 }
353
354 if (etnaviv_pm_req_validate(r, exec_state)) {
355 DRM_ERROR("perfmon request: domain or signal not valid");
356 return -EINVAL;
357 }
358
359 submit->pmrs[i].flags = r->flags;
360 submit->pmrs[i].domain = r->domain;
361 submit->pmrs[i].signal = r->signal;
362 submit->pmrs[i].sequence = r->sequence;
363 submit->pmrs[i].offset = r->read_offset;
364 submit->pmrs[i].bo_vma = etnaviv_gem_vmap(&bo->obj->base);
365 }
366
367 return 0;
368}
369
370static void submit_cleanup(struct kref *kref)
371{
372 struct etnaviv_gem_submit *submit =
373 container_of(kref, struct etnaviv_gem_submit, refcount);
374 unsigned i;
375
376 if (submit->runtime_resumed)
377 pm_runtime_put_autosuspend(submit->gpu->dev);
378
379 if (submit->cmdbuf.suballoc)
380 etnaviv_cmdbuf_free(&submit->cmdbuf);
381
382 if (submit->mmu_context)
383 etnaviv_iommu_context_put(submit->mmu_context);
384
385 if (submit->prev_mmu_context)
386 etnaviv_iommu_context_put(submit->prev_mmu_context);
387
388 for (i = 0; i < submit->nr_bos; i++) {
389 struct etnaviv_gem_object *etnaviv_obj = submit->bos[i].obj;
390
391 /* unpin all objects */
392 if (submit->bos[i].flags & BO_PINNED) {
393 etnaviv_gem_mapping_unreference(submit->bos[i].mapping);
394 atomic_dec(&etnaviv_obj->gpu_active);
395 submit->bos[i].mapping = NULL;
396 submit->bos[i].flags &= ~BO_PINNED;
397 }
398
399 /* if the GPU submit failed, objects might still be locked */
400 submit_unlock_object(submit, i);
401 drm_gem_object_put_unlocked(&etnaviv_obj->base);
402 }
403
404 wake_up_all(&submit->gpu->fence_event);
405
406 if (submit->in_fence)
407 dma_fence_put(submit->in_fence);
408 if (submit->out_fence) {
409 /* first remove from IDR, so fence can not be found anymore */
410 mutex_lock(&submit->gpu->fence_lock);
411 idr_remove(&submit->gpu->fence_idr, submit->out_fence_id);
412 mutex_unlock(&submit->gpu->fence_lock);
413 dma_fence_put(submit->out_fence);
414 }
415 kfree(submit->pmrs);
416 kfree(submit);
417}
418
419void etnaviv_submit_put(struct etnaviv_gem_submit *submit)
420{
421 kref_put(&submit->refcount, submit_cleanup);
422}
423
424int etnaviv_ioctl_gem_submit(struct drm_device *dev, void *data,
425 struct drm_file *file)
426{
427 struct etnaviv_file_private *ctx = file->driver_priv;
428 struct etnaviv_drm_private *priv = dev->dev_private;
429 struct drm_etnaviv_gem_submit *args = data;
430 struct drm_etnaviv_gem_submit_reloc *relocs;
431 struct drm_etnaviv_gem_submit_pmr *pmrs;
432 struct drm_etnaviv_gem_submit_bo *bos;
433 struct etnaviv_gem_submit *submit;
434 struct etnaviv_gpu *gpu;
435 struct sync_file *sync_file = NULL;
436 struct ww_acquire_ctx ticket;
437 int out_fence_fd = -1;
438 void *stream;
439 int ret;
440
441 if (args->pipe >= ETNA_MAX_PIPES)
442 return -EINVAL;
443
444 gpu = priv->gpu[args->pipe];
445 if (!gpu)
446 return -ENXIO;
447
448 if (args->stream_size % 4) {
449 DRM_ERROR("non-aligned cmdstream buffer size: %u\n",
450 args->stream_size);
451 return -EINVAL;
452 }
453
454 if (args->exec_state != ETNA_PIPE_3D &&
455 args->exec_state != ETNA_PIPE_2D &&
456 args->exec_state != ETNA_PIPE_VG) {
457 DRM_ERROR("invalid exec_state: 0x%x\n", args->exec_state);
458 return -EINVAL;
459 }
460
461 if (args->flags & ~ETNA_SUBMIT_FLAGS) {
462 DRM_ERROR("invalid flags: 0x%x\n", args->flags);
463 return -EINVAL;
464 }
465
466 if ((args->flags & ETNA_SUBMIT_SOFTPIN) &&
467 priv->mmu_global->version != ETNAVIV_IOMMU_V2) {
468 DRM_ERROR("softpin requested on incompatible MMU\n");
469 return -EINVAL;
470 }
471
472 /*
473 * Copy the command submission and bo array to kernel space in
474 * one go, and do this outside of any locks.
475 */
476 bos = kvmalloc_array(args->nr_bos, sizeof(*bos), GFP_KERNEL);
477 relocs = kvmalloc_array(args->nr_relocs, sizeof(*relocs), GFP_KERNEL);
478 pmrs = kvmalloc_array(args->nr_pmrs, sizeof(*pmrs), GFP_KERNEL);
479 stream = kvmalloc_array(1, args->stream_size, GFP_KERNEL);
480 if (!bos || !relocs || !pmrs || !stream) {
481 ret = -ENOMEM;
482 goto err_submit_cmds;
483 }
484
485 ret = copy_from_user(bos, u64_to_user_ptr(args->bos),
486 args->nr_bos * sizeof(*bos));
487 if (ret) {
488 ret = -EFAULT;
489 goto err_submit_cmds;
490 }
491
492 ret = copy_from_user(relocs, u64_to_user_ptr(args->relocs),
493 args->nr_relocs * sizeof(*relocs));
494 if (ret) {
495 ret = -EFAULT;
496 goto err_submit_cmds;
497 }
498
499 ret = copy_from_user(pmrs, u64_to_user_ptr(args->pmrs),
500 args->nr_pmrs * sizeof(*pmrs));
501 if (ret) {
502 ret = -EFAULT;
503 goto err_submit_cmds;
504 }
505
506 ret = copy_from_user(stream, u64_to_user_ptr(args->stream),
507 args->stream_size);
508 if (ret) {
509 ret = -EFAULT;
510 goto err_submit_cmds;
511 }
512
513 if (args->flags & ETNA_SUBMIT_FENCE_FD_OUT) {
514 out_fence_fd = get_unused_fd_flags(O_CLOEXEC);
515 if (out_fence_fd < 0) {
516 ret = out_fence_fd;
517 goto err_submit_cmds;
518 }
519 }
520
521 ww_acquire_init(&ticket, &reservation_ww_class);
522
523 submit = submit_create(dev, gpu, args->nr_bos, args->nr_pmrs);
524 if (!submit) {
525 ret = -ENOMEM;
526 goto err_submit_ww_acquire;
527 }
528
529 ret = etnaviv_cmdbuf_init(priv->cmdbuf_suballoc, &submit->cmdbuf,
530 ALIGN(args->stream_size, 8) + 8);
531 if (ret)
532 goto err_submit_objects;
533
534 submit->ctx = file->driver_priv;
535 etnaviv_iommu_context_get(submit->ctx->mmu);
536 submit->mmu_context = submit->ctx->mmu;
537 submit->exec_state = args->exec_state;
538 submit->flags = args->flags;
539
540 ret = submit_lookup_objects(submit, file, bos, args->nr_bos);
541 if (ret)
542 goto err_submit_objects;
543
544 if ((priv->mmu_global->version != ETNAVIV_IOMMU_V2) &&
545 !etnaviv_cmd_validate_one(gpu, stream, args->stream_size / 4,
546 relocs, args->nr_relocs)) {
547 ret = -EINVAL;
548 goto err_submit_objects;
549 }
550
551 if (args->flags & ETNA_SUBMIT_FENCE_FD_IN) {
552 submit->in_fence = sync_file_get_fence(args->fence_fd);
553 if (!submit->in_fence) {
554 ret = -EINVAL;
555 goto err_submit_objects;
556 }
557 }
558
559 ret = submit_pin_objects(submit);
560 if (ret)
561 goto err_submit_objects;
562
563 ret = submit_reloc(submit, stream, args->stream_size / 4,
564 relocs, args->nr_relocs);
565 if (ret)
566 goto err_submit_objects;
567
568 ret = submit_perfmon_validate(submit, args->exec_state, pmrs);
569 if (ret)
570 goto err_submit_objects;
571
572 memcpy(submit->cmdbuf.vaddr, stream, args->stream_size);
573
574 ret = submit_lock_objects(submit, &ticket);
575 if (ret)
576 goto err_submit_objects;
577
578 ret = submit_fence_sync(submit);
579 if (ret)
580 goto err_submit_objects;
581
582 ret = etnaviv_sched_push_job(&ctx->sched_entity[args->pipe], submit);
583 if (ret)
584 goto err_submit_objects;
585
586 submit_attach_object_fences(submit);
587
588 if (args->flags & ETNA_SUBMIT_FENCE_FD_OUT) {
589 /*
590 * This can be improved: ideally we want to allocate the sync
591 * file before kicking off the GPU job and just attach the
592 * fence to the sync file here, eliminating the ENOMEM
593 * possibility at this stage.
594 */
595 sync_file = sync_file_create(submit->out_fence);
596 if (!sync_file) {
597 ret = -ENOMEM;
598 goto err_submit_objects;
599 }
600 fd_install(out_fence_fd, sync_file->file);
601 }
602
603 args->fence_fd = out_fence_fd;
604 args->fence = submit->out_fence_id;
605
606err_submit_objects:
607 etnaviv_submit_put(submit);
608
609err_submit_ww_acquire:
610 ww_acquire_fini(&ticket);
611
612err_submit_cmds:
613 if (ret && (out_fence_fd >= 0))
614 put_unused_fd(out_fence_fd);
615 if (stream)
616 kvfree(stream);
617 if (bos)
618 kvfree(bos);
619 if (relocs)
620 kvfree(relocs);
621 if (pmrs)
622 kvfree(pmrs);
623
624 return ret;
625}