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