Commit | Line | Data |
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7198e6b0 RC |
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 "msm_drv.h" | |
19 | #include "msm_gpu.h" | |
20 | #include "msm_gem.h" | |
21 | ||
22 | /* | |
23 | * Cmdstream submission: | |
24 | */ | |
25 | ||
7198e6b0 | 26 | /* make sure these don't conflict w/ MSM_SUBMIT_BO_x */ |
340faef2 | 27 | #define BO_VALID 0x8000 /* is current addr in cmdstream correct/valid? */ |
7198e6b0 RC |
28 | #define BO_LOCKED 0x4000 |
29 | #define BO_PINNED 0x2000 | |
30 | ||
7198e6b0 | 31 | static struct msm_gem_submit *submit_create(struct drm_device *dev, |
6b597ce2 | 32 | struct msm_gpu *gpu, int nr_bos, int nr_cmds) |
7198e6b0 RC |
33 | { |
34 | struct msm_gem_submit *submit; | |
6b597ce2 RC |
35 | int sz = sizeof(*submit) + (nr_bos * sizeof(submit->bos[0])) + |
36 | (nr_cmds * sizeof(*submit->cmd)); | |
7198e6b0 RC |
37 | |
38 | submit = kmalloc(sz, GFP_TEMPORARY | __GFP_NOWARN | __GFP_NORETRY); | |
6860b56c RC |
39 | if (!submit) |
40 | return NULL; | |
7198e6b0 | 41 | |
6860b56c RC |
42 | submit->dev = dev; |
43 | submit->gpu = gpu; | |
ba344afd | 44 | submit->fence = NULL; |
4816b626 | 45 | submit->pid = get_pid(task_pid(current)); |
6b597ce2 | 46 | submit->cmd = (void *)&submit->bos[nr_bos]; |
7198e6b0 | 47 | |
6860b56c RC |
48 | /* initially, until copy_from_user() and bo lookup succeeds: */ |
49 | submit->nr_bos = 0; | |
50 | submit->nr_cmds = 0; | |
51 | ||
ba344afd | 52 | INIT_LIST_HEAD(&submit->node); |
6860b56c RC |
53 | INIT_LIST_HEAD(&submit->bo_list); |
54 | ww_acquire_init(&submit->ticket, &reservation_ww_class); | |
7198e6b0 RC |
55 | |
56 | return submit; | |
57 | } | |
58 | ||
40e6815b RC |
59 | void msm_gem_submit_free(struct msm_gem_submit *submit) |
60 | { | |
61 | fence_put(submit->fence); | |
62 | list_del(&submit->node); | |
4816b626 | 63 | put_pid(submit->pid); |
40e6815b RC |
64 | kfree(submit); |
65 | } | |
66 | ||
89f82cbb RC |
67 | static inline unsigned long __must_check |
68 | copy_from_user_inatomic(void *to, const void __user *from, unsigned long n) | |
69 | { | |
70 | if (access_ok(VERIFY_READ, from, n)) | |
71 | return __copy_from_user_inatomic(to, from, n); | |
72 | return -EFAULT; | |
73 | } | |
74 | ||
7198e6b0 RC |
75 | static int submit_lookup_objects(struct msm_gem_submit *submit, |
76 | struct drm_msm_gem_submit *args, struct drm_file *file) | |
77 | { | |
78 | unsigned i; | |
79 | int ret = 0; | |
80 | ||
81 | spin_lock(&file->table_lock); | |
89f82cbb | 82 | pagefault_disable(); |
7198e6b0 RC |
83 | |
84 | for (i = 0; i < args->nr_bos; i++) { | |
85 | struct drm_msm_gem_submit_bo submit_bo; | |
86 | struct drm_gem_object *obj; | |
87 | struct msm_gem_object *msm_obj; | |
88 | void __user *userptr = | |
3ed605bc | 89 | u64_to_user_ptr(args->bos + (i * sizeof(submit_bo))); |
7198e6b0 | 90 | |
a9e26cab RC |
91 | /* make sure we don't have garbage flags, in case we hit |
92 | * error path before flags is initialized: | |
93 | */ | |
94 | submit->bos[i].flags = 0; | |
95 | ||
89f82cbb RC |
96 | ret = copy_from_user_inatomic(&submit_bo, userptr, sizeof(submit_bo)); |
97 | if (unlikely(ret)) { | |
98 | pagefault_enable(); | |
99 | spin_unlock(&file->table_lock); | |
100 | ret = copy_from_user(&submit_bo, userptr, sizeof(submit_bo)); | |
101 | if (ret) | |
102 | goto out; | |
103 | spin_lock(&file->table_lock); | |
104 | pagefault_disable(); | |
7198e6b0 RC |
105 | } |
106 | ||
93ddb0d3 | 107 | if (submit_bo.flags & ~MSM_SUBMIT_BO_FLAGS) { |
19872533 | 108 | DRM_ERROR("invalid flags: %x\n", submit_bo.flags); |
7198e6b0 RC |
109 | ret = -EINVAL; |
110 | goto out_unlock; | |
111 | } | |
112 | ||
113 | submit->bos[i].flags = submit_bo.flags; | |
114 | /* in validate_objects() we figure out if this is true: */ | |
115 | submit->bos[i].iova = submit_bo.presumed; | |
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_bo.handle); | |
121 | if (!obj) { | |
19872533 | 122 | DRM_ERROR("invalid handle %u at index %u\n", submit_bo.handle, i); |
7198e6b0 RC |
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)) { | |
19872533 | 130 | DRM_ERROR("handle %u at index %u already on submit list\n", |
7198e6b0 RC |
131 | submit_bo.handle, i); |
132 | ret = -EINVAL; | |
133 | goto out_unlock; | |
134 | } | |
135 | ||
136 | drm_gem_object_reference(obj); | |
137 | ||
138 | submit->bos[i].obj = msm_obj; | |
139 | ||
140 | list_add_tail(&msm_obj->submit_entry, &submit->bo_list); | |
141 | } | |
142 | ||
143 | out_unlock: | |
89f82cbb | 144 | pagefault_enable(); |
7198e6b0 RC |
145 | spin_unlock(&file->table_lock); |
146 | ||
89f82cbb RC |
147 | out: |
148 | submit->nr_bos = i; | |
149 | ||
7198e6b0 RC |
150 | return ret; |
151 | } | |
152 | ||
153 | static void submit_unlock_unpin_bo(struct msm_gem_submit *submit, int i) | |
154 | { | |
155 | struct msm_gem_object *msm_obj = submit->bos[i].obj; | |
156 | ||
157 | if (submit->bos[i].flags & BO_PINNED) | |
158 | msm_gem_put_iova(&msm_obj->base, submit->gpu->id); | |
159 | ||
160 | if (submit->bos[i].flags & BO_LOCKED) | |
161 | ww_mutex_unlock(&msm_obj->resv->lock); | |
162 | ||
163 | if (!(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: */ | |
340faef2 | 170 | static int submit_lock_objects(struct msm_gem_submit *submit) |
7198e6b0 RC |
171 | { |
172 | int contended, slow_locked = -1, i, ret = 0; | |
173 | ||
174 | retry: | |
7198e6b0 RC |
175 | for (i = 0; i < submit->nr_bos; i++) { |
176 | struct msm_gem_object *msm_obj = submit->bos[i].obj; | |
7198e6b0 RC |
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->resv->lock, | |
185 | &submit->ticket); | |
186 | if (ret) | |
187 | goto fail; | |
188 | submit->bos[i].flags |= BO_LOCKED; | |
189 | } | |
7198e6b0 RC |
190 | } |
191 | ||
192 | ww_acquire_done(&submit->ticket); | |
193 | ||
194 | return 0; | |
195 | ||
196 | fail: | |
197 | for (; i >= 0; i--) | |
198 | submit_unlock_unpin_bo(submit, i); | |
199 | ||
200 | if (slow_locked > 0) | |
201 | submit_unlock_unpin_bo(submit, slow_locked); | |
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->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 | ||
b6295f9a RC |
218 | static int submit_fence_sync(struct msm_gem_submit *submit) |
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 | ret = msm_gem_sync_object(&msm_obj->base, submit->gpu->fctx, write); | |
227 | if (ret) | |
228 | break; | |
229 | } | |
230 | ||
231 | return ret; | |
232 | } | |
233 | ||
340faef2 RC |
234 | static int submit_pin_objects(struct msm_gem_submit *submit) |
235 | { | |
236 | int i, ret = 0; | |
237 | ||
238 | submit->valid = true; | |
239 | ||
240 | for (i = 0; i < submit->nr_bos; i++) { | |
241 | struct msm_gem_object *msm_obj = submit->bos[i].obj; | |
242 | uint32_t iova; | |
243 | ||
244 | /* if locking succeeded, pin bo: */ | |
245 | ret = msm_gem_get_iova_locked(&msm_obj->base, | |
246 | submit->gpu->id, &iova); | |
247 | ||
248 | if (ret) | |
249 | break; | |
250 | ||
251 | submit->bos[i].flags |= BO_PINNED; | |
252 | ||
253 | if (iova == submit->bos[i].iova) { | |
254 | submit->bos[i].flags |= BO_VALID; | |
255 | } else { | |
256 | submit->bos[i].iova = iova; | |
257 | /* iova changed, so address in cmdstream is not valid: */ | |
258 | submit->bos[i].flags &= ~BO_VALID; | |
259 | submit->valid = false; | |
260 | } | |
261 | } | |
262 | ||
263 | return ret; | |
264 | } | |
265 | ||
7198e6b0 RC |
266 | static int submit_bo(struct msm_gem_submit *submit, uint32_t idx, |
267 | struct msm_gem_object **obj, uint32_t *iova, bool *valid) | |
268 | { | |
269 | if (idx >= submit->nr_bos) { | |
19872533 RC |
270 | DRM_ERROR("invalid buffer index: %u (out of %u)\n", |
271 | idx, submit->nr_bos); | |
272 | return -EINVAL; | |
7198e6b0 RC |
273 | } |
274 | ||
275 | if (obj) | |
276 | *obj = submit->bos[idx].obj; | |
277 | if (iova) | |
278 | *iova = submit->bos[idx].iova; | |
279 | if (valid) | |
280 | *valid = !!(submit->bos[idx].flags & BO_VALID); | |
281 | ||
282 | return 0; | |
283 | } | |
284 | ||
285 | /* process the reloc's and patch up the cmdstream as needed: */ | |
286 | static int submit_reloc(struct msm_gem_submit *submit, struct msm_gem_object *obj, | |
287 | uint32_t offset, uint32_t nr_relocs, uint64_t relocs) | |
288 | { | |
289 | uint32_t i, last_offset = 0; | |
290 | uint32_t *ptr; | |
291 | int ret; | |
292 | ||
293 | if (offset % 4) { | |
19872533 | 294 | DRM_ERROR("non-aligned cmdstream buffer: %u\n", offset); |
7198e6b0 RC |
295 | return -EINVAL; |
296 | } | |
297 | ||
298 | /* For now, just map the entire thing. Eventually we probably | |
299 | * to do it page-by-page, w/ kmap() if not vmap()d.. | |
300 | */ | |
18f23049 | 301 | ptr = msm_gem_get_vaddr_locked(&obj->base); |
7198e6b0 RC |
302 | |
303 | if (IS_ERR(ptr)) { | |
304 | ret = PTR_ERR(ptr); | |
305 | DBG("failed to map: %d", ret); | |
306 | return ret; | |
307 | } | |
308 | ||
309 | for (i = 0; i < nr_relocs; i++) { | |
310 | struct drm_msm_gem_submit_reloc submit_reloc; | |
311 | void __user *userptr = | |
3ed605bc | 312 | u64_to_user_ptr(relocs + (i * sizeof(submit_reloc))); |
7198e6b0 RC |
313 | uint32_t iova, off; |
314 | bool valid; | |
315 | ||
316 | ret = copy_from_user(&submit_reloc, userptr, sizeof(submit_reloc)); | |
317 | if (ret) | |
318 | return -EFAULT; | |
319 | ||
320 | if (submit_reloc.submit_offset % 4) { | |
19872533 | 321 | DRM_ERROR("non-aligned reloc offset: %u\n", |
7198e6b0 RC |
322 | submit_reloc.submit_offset); |
323 | return -EINVAL; | |
324 | } | |
325 | ||
326 | /* offset in dwords: */ | |
327 | off = submit_reloc.submit_offset / 4; | |
328 | ||
329 | if ((off >= (obj->base.size / 4)) || | |
330 | (off < last_offset)) { | |
19872533 | 331 | DRM_ERROR("invalid offset %u at reloc %u\n", off, i); |
7198e6b0 RC |
332 | return -EINVAL; |
333 | } | |
334 | ||
335 | ret = submit_bo(submit, submit_reloc.reloc_idx, NULL, &iova, &valid); | |
336 | if (ret) | |
337 | return ret; | |
338 | ||
339 | if (valid) | |
340 | continue; | |
341 | ||
342 | iova += submit_reloc.reloc_offset; | |
343 | ||
344 | if (submit_reloc.shift < 0) | |
345 | iova >>= -submit_reloc.shift; | |
346 | else | |
347 | iova <<= submit_reloc.shift; | |
348 | ||
349 | ptr[off] = iova | submit_reloc.or; | |
350 | ||
351 | last_offset = off; | |
352 | } | |
353 | ||
18f23049 RC |
354 | msm_gem_put_vaddr_locked(&obj->base); |
355 | ||
7198e6b0 RC |
356 | return 0; |
357 | } | |
358 | ||
40e6815b | 359 | static void submit_cleanup(struct msm_gem_submit *submit) |
7198e6b0 RC |
360 | { |
361 | unsigned i; | |
362 | ||
7198e6b0 RC |
363 | for (i = 0; i < submit->nr_bos; i++) { |
364 | struct msm_gem_object *msm_obj = submit->bos[i].obj; | |
365 | submit_unlock_unpin_bo(submit, i); | |
366 | list_del_init(&msm_obj->submit_entry); | |
367 | drm_gem_object_unreference(&msm_obj->base); | |
368 | } | |
7198e6b0 RC |
369 | |
370 | ww_acquire_fini(&submit->ticket); | |
7198e6b0 RC |
371 | } |
372 | ||
373 | int msm_ioctl_gem_submit(struct drm_device *dev, void *data, | |
374 | struct drm_file *file) | |
375 | { | |
376 | struct msm_drm_private *priv = dev->dev_private; | |
377 | struct drm_msm_gem_submit *args = data; | |
378 | struct msm_file_private *ctx = file->driver_priv; | |
379 | struct msm_gem_submit *submit; | |
c01a958e | 380 | struct msm_gpu *gpu = priv->gpu; |
7198e6b0 RC |
381 | unsigned i; |
382 | int ret; | |
383 | ||
c01a958e RC |
384 | if (!gpu) |
385 | return -ENXIO; | |
386 | ||
7198e6b0 RC |
387 | /* for now, we just have 3d pipe.. eventually this would need to |
388 | * be more clever to dispatch to appropriate gpu module: | |
389 | */ | |
390 | if (args->pipe != MSM_PIPE_3D0) | |
391 | return -EINVAL; | |
392 | ||
b5b4c264 RC |
393 | ret = mutex_lock_interruptible(&dev->struct_mutex); |
394 | if (ret) | |
395 | return ret; | |
687f084a | 396 | |
d78d383a RC |
397 | priv->struct_mutex_task = current; |
398 | ||
6b597ce2 | 399 | submit = submit_create(dev, gpu, args->nr_bos, args->nr_cmds); |
b5b4c264 RC |
400 | if (!submit) { |
401 | ret = -ENOMEM; | |
402 | goto out_unlock; | |
403 | } | |
7198e6b0 RC |
404 | |
405 | ret = submit_lookup_objects(submit, args, file); | |
406 | if (ret) | |
407 | goto out; | |
408 | ||
340faef2 RC |
409 | ret = submit_lock_objects(submit); |
410 | if (ret) | |
411 | goto out; | |
412 | ||
b6295f9a RC |
413 | ret = submit_fence_sync(submit); |
414 | if (ret) | |
415 | goto out; | |
416 | ||
340faef2 | 417 | ret = submit_pin_objects(submit); |
7198e6b0 RC |
418 | if (ret) |
419 | goto out; | |
420 | ||
421 | for (i = 0; i < args->nr_cmds; i++) { | |
422 | struct drm_msm_gem_submit_cmd submit_cmd; | |
423 | void __user *userptr = | |
3ed605bc | 424 | u64_to_user_ptr(args->cmds + (i * sizeof(submit_cmd))); |
7198e6b0 RC |
425 | struct msm_gem_object *msm_obj; |
426 | uint32_t iova; | |
427 | ||
428 | ret = copy_from_user(&submit_cmd, userptr, sizeof(submit_cmd)); | |
429 | if (ret) { | |
430 | ret = -EFAULT; | |
431 | goto out; | |
432 | } | |
433 | ||
93ddb0d3 RC |
434 | /* validate input from userspace: */ |
435 | switch (submit_cmd.type) { | |
436 | case MSM_SUBMIT_CMD_BUF: | |
437 | case MSM_SUBMIT_CMD_IB_TARGET_BUF: | |
438 | case MSM_SUBMIT_CMD_CTX_RESTORE_BUF: | |
439 | break; | |
440 | default: | |
441 | DRM_ERROR("invalid type: %08x\n", submit_cmd.type); | |
442 | ret = -EINVAL; | |
443 | goto out; | |
444 | } | |
445 | ||
7198e6b0 RC |
446 | ret = submit_bo(submit, submit_cmd.submit_idx, |
447 | &msm_obj, &iova, NULL); | |
448 | if (ret) | |
449 | goto out; | |
450 | ||
451 | if (submit_cmd.size % 4) { | |
19872533 | 452 | DRM_ERROR("non-aligned cmdstream buffer size: %u\n", |
7198e6b0 RC |
453 | submit_cmd.size); |
454 | ret = -EINVAL; | |
455 | goto out; | |
456 | } | |
457 | ||
19872533 RC |
458 | if ((submit_cmd.size + submit_cmd.submit_offset) >= |
459 | msm_obj->base.size) { | |
460 | DRM_ERROR("invalid cmdstream size: %u\n", submit_cmd.size); | |
7198e6b0 RC |
461 | ret = -EINVAL; |
462 | goto out; | |
463 | } | |
464 | ||
465 | submit->cmd[i].type = submit_cmd.type; | |
466 | submit->cmd[i].size = submit_cmd.size / 4; | |
467 | submit->cmd[i].iova = iova + submit_cmd.submit_offset; | |
a7d3c950 | 468 | submit->cmd[i].idx = submit_cmd.submit_idx; |
7198e6b0 RC |
469 | |
470 | if (submit->valid) | |
471 | continue; | |
472 | ||
473 | ret = submit_reloc(submit, msm_obj, submit_cmd.submit_offset, | |
474 | submit_cmd.nr_relocs, submit_cmd.relocs); | |
475 | if (ret) | |
476 | goto out; | |
477 | } | |
478 | ||
479 | submit->nr_cmds = i; | |
480 | ||
481 | ret = msm_gpu_submit(gpu, submit, ctx); | |
482 | ||
b6295f9a | 483 | args->fence = submit->fence->seqno; |
7198e6b0 RC |
484 | |
485 | out: | |
40e6815b RC |
486 | submit_cleanup(submit); |
487 | if (ret) | |
488 | msm_gem_submit_free(submit); | |
b5b4c264 | 489 | out_unlock: |
d78d383a | 490 | priv->struct_mutex_task = NULL; |
c2703b13 | 491 | mutex_unlock(&dev->struct_mutex); |
7198e6b0 RC |
492 | return ret; |
493 | } |