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8#include <linux/dma-mapping.h>
9#include <linux/err.h>
10#include <linux/host1x.h>
11#include <linux/iommu.h>
12#include <linux/kref.h>
13#include <linux/module.h>
14#include <linux/scatterlist.h>
15#include <linux/slab.h>
16#include <linux/vmalloc.h>
17#include <trace/events/host1x.h>
18
19#include "channel.h"
20#include "dev.h"
21#include "job.h"
22#include "syncpt.h"
23
24#define HOST1X_WAIT_SYNCPT_OFFSET 0x8
25
26struct host1x_job *host1x_job_alloc(struct host1x_channel *ch,
27 u32 num_cmdbufs, u32 num_relocs)
28{
29 struct host1x_job *job = NULL;
30 unsigned int num_unpins = num_cmdbufs + num_relocs;
31 u64 total;
32 void *mem;
33
34
35 total = sizeof(struct host1x_job) +
36 (u64)num_relocs * sizeof(struct host1x_reloc) +
37 (u64)num_unpins * sizeof(struct host1x_job_unpin_data) +
38 (u64)num_cmdbufs * sizeof(struct host1x_job_gather) +
39 (u64)num_unpins * sizeof(dma_addr_t) +
40 (u64)num_unpins * sizeof(u32 *);
41 if (total > ULONG_MAX)
42 return NULL;
43
44 mem = job = kzalloc(total, GFP_KERNEL);
45 if (!job)
46 return NULL;
47
48 kref_init(&job->ref);
49 job->channel = ch;
50
51
52 mem += sizeof(struct host1x_job);
53 job->relocs = num_relocs ? mem : NULL;
54 mem += num_relocs * sizeof(struct host1x_reloc);
55 job->unpins = num_unpins ? mem : NULL;
56 mem += num_unpins * sizeof(struct host1x_job_unpin_data);
57 job->gathers = num_cmdbufs ? mem : NULL;
58 mem += num_cmdbufs * sizeof(struct host1x_job_gather);
59 job->addr_phys = num_unpins ? mem : NULL;
60
61 job->reloc_addr_phys = job->addr_phys;
62 job->gather_addr_phys = &job->addr_phys[num_relocs];
63
64 return job;
65}
66EXPORT_SYMBOL(host1x_job_alloc);
67
68struct host1x_job *host1x_job_get(struct host1x_job *job)
69{
70 kref_get(&job->ref);
71 return job;
72}
73EXPORT_SYMBOL(host1x_job_get);
74
75static void job_free(struct kref *ref)
76{
77 struct host1x_job *job = container_of(ref, struct host1x_job, ref);
78
79 kfree(job);
80}
81
82void host1x_job_put(struct host1x_job *job)
83{
84 kref_put(&job->ref, job_free);
85}
86EXPORT_SYMBOL(host1x_job_put);
87
88void host1x_job_add_gather(struct host1x_job *job, struct host1x_bo *bo,
89 unsigned int words, unsigned int offset)
90{
91 struct host1x_job_gather *gather = &job->gathers[job->num_gathers];
92
93 gather->words = words;
94 gather->bo = bo;
95 gather->offset = offset;
96
97 job->num_gathers++;
98}
99EXPORT_SYMBOL(host1x_job_add_gather);
100
101static unsigned int pin_job(struct host1x *host, struct host1x_job *job)
102{
103 struct host1x_client *client = job->client;
104 struct device *dev = client->dev;
105 struct iommu_domain *domain;
106 unsigned int i;
107 int err;
108
109 domain = iommu_get_domain_for_dev(dev);
110 job->num_unpins = 0;
111
112 for (i = 0; i < job->num_relocs; i++) {
113 struct host1x_reloc *reloc = &job->relocs[i];
114 dma_addr_t phys_addr, *phys;
115 struct sg_table *sgt;
116
117 reloc->target.bo = host1x_bo_get(reloc->target.bo);
118 if (!reloc->target.bo) {
119 err = -EINVAL;
120 goto unpin;
121 }
122
123
124
125
126
127
128
129
130
131
132
133
134
135 if (!domain || client->group)
136 phys = &phys_addr;
137 else
138 phys = NULL;
139
140 sgt = host1x_bo_pin(dev, reloc->target.bo, phys);
141 if (IS_ERR(sgt)) {
142 err = PTR_ERR(sgt);
143 goto unpin;
144 }
145
146 if (sgt) {
147 unsigned long mask = HOST1X_RELOC_READ |
148 HOST1X_RELOC_WRITE;
149 enum dma_data_direction dir;
150
151 switch (reloc->flags & mask) {
152 case HOST1X_RELOC_READ:
153 dir = DMA_TO_DEVICE;
154 break;
155
156 case HOST1X_RELOC_WRITE:
157 dir = DMA_FROM_DEVICE;
158 break;
159
160 case HOST1X_RELOC_READ | HOST1X_RELOC_WRITE:
161 dir = DMA_BIDIRECTIONAL;
162 break;
163
164 default:
165 err = -EINVAL;
166 goto unpin;
167 }
168
169 err = dma_map_sg(dev, sgt->sgl, sgt->nents, dir);
170 if (!err) {
171 err = -ENOMEM;
172 goto unpin;
173 }
174
175 job->unpins[job->num_unpins].dev = dev;
176 job->unpins[job->num_unpins].dir = dir;
177 phys_addr = sg_dma_address(sgt->sgl);
178 }
179
180 job->addr_phys[job->num_unpins] = phys_addr;
181 job->unpins[job->num_unpins].bo = reloc->target.bo;
182 job->unpins[job->num_unpins].sgt = sgt;
183 job->num_unpins++;
184 }
185
186 for (i = 0; i < job->num_gathers; i++) {
187 struct host1x_job_gather *g = &job->gathers[i];
188 size_t gather_size = 0;
189 struct scatterlist *sg;
190 struct sg_table *sgt;
191 dma_addr_t phys_addr;
192 unsigned long shift;
193 struct iova *alloc;
194 dma_addr_t *phys;
195 unsigned int j;
196
197 g->bo = host1x_bo_get(g->bo);
198 if (!g->bo) {
199 err = -EINVAL;
200 goto unpin;
201 }
202
203
204
205
206
207
208 if (!iommu_get_domain_for_dev(host->dev))
209 phys = &phys_addr;
210 else
211 phys = NULL;
212
213 sgt = host1x_bo_pin(host->dev, g->bo, phys);
214 if (IS_ERR(sgt)) {
215 err = PTR_ERR(sgt);
216 goto unpin;
217 }
218
219 if (!IS_ENABLED(CONFIG_TEGRA_HOST1X_FIREWALL) && host->domain) {
220 for_each_sg(sgt->sgl, sg, sgt->nents, j)
221 gather_size += sg->length;
222 gather_size = iova_align(&host->iova, gather_size);
223
224 shift = iova_shift(&host->iova);
225 alloc = alloc_iova(&host->iova, gather_size >> shift,
226 host->iova_end >> shift, true);
227 if (!alloc) {
228 err = -ENOMEM;
229 goto unpin;
230 }
231
232 err = iommu_map_sg(host->domain,
233 iova_dma_addr(&host->iova, alloc),
234 sgt->sgl, sgt->nents, IOMMU_READ);
235 if (err == 0) {
236 __free_iova(&host->iova, alloc);
237 err = -EINVAL;
238 goto unpin;
239 }
240
241 job->unpins[job->num_unpins].size = gather_size;
242 phys_addr = iova_dma_addr(&host->iova, alloc);
243 } else if (sgt) {
244 err = dma_map_sg(host->dev, sgt->sgl, sgt->nents,
245 DMA_TO_DEVICE);
246 if (!err) {
247 err = -ENOMEM;
248 goto unpin;
249 }
250
251 job->unpins[job->num_unpins].dir = DMA_TO_DEVICE;
252 job->unpins[job->num_unpins].dev = host->dev;
253 phys_addr = sg_dma_address(sgt->sgl);
254 }
255
256 job->addr_phys[job->num_unpins] = phys_addr;
257 job->gather_addr_phys[i] = phys_addr;
258
259 job->unpins[job->num_unpins].bo = g->bo;
260 job->unpins[job->num_unpins].sgt = sgt;
261 job->num_unpins++;
262 }
263
264 return 0;
265
266unpin:
267 host1x_job_unpin(job);
268 return err;
269}
270
271static int do_relocs(struct host1x_job *job, struct host1x_job_gather *g)
272{
273 void *cmdbuf_addr = NULL;
274 struct host1x_bo *cmdbuf = g->bo;
275 unsigned int i;
276
277
278 for (i = 0; i < job->num_relocs; i++) {
279 struct host1x_reloc *reloc = &job->relocs[i];
280 u32 reloc_addr = (job->reloc_addr_phys[i] +
281 reloc->target.offset) >> reloc->shift;
282 u32 *target;
283
284
285 if (cmdbuf != reloc->cmdbuf.bo)
286 continue;
287
288 if (IS_ENABLED(CONFIG_TEGRA_HOST1X_FIREWALL)) {
289 target = (u32 *)job->gather_copy_mapped +
290 reloc->cmdbuf.offset / sizeof(u32) +
291 g->offset / sizeof(u32);
292 goto patch_reloc;
293 }
294
295 if (!cmdbuf_addr) {
296 cmdbuf_addr = host1x_bo_mmap(cmdbuf);
297
298 if (unlikely(!cmdbuf_addr)) {
299 pr_err("Could not map cmdbuf for relocation\n");
300 return -ENOMEM;
301 }
302 }
303
304 target = cmdbuf_addr + reloc->cmdbuf.offset;
305patch_reloc:
306 *target = reloc_addr;
307 }
308
309 if (cmdbuf_addr)
310 host1x_bo_munmap(cmdbuf, cmdbuf_addr);
311
312 return 0;
313}
314
315static bool check_reloc(struct host1x_reloc *reloc, struct host1x_bo *cmdbuf,
316 unsigned int offset)
317{
318 offset *= sizeof(u32);
319
320 if (reloc->cmdbuf.bo != cmdbuf || reloc->cmdbuf.offset != offset)
321 return false;
322
323
324 if (reloc->shift)
325 return false;
326
327 return true;
328}
329
330struct host1x_firewall {
331 struct host1x_job *job;
332 struct device *dev;
333
334 unsigned int num_relocs;
335 struct host1x_reloc *reloc;
336
337 struct host1x_bo *cmdbuf;
338 unsigned int offset;
339
340 u32 words;
341 u32 class;
342 u32 reg;
343 u32 mask;
344 u32 count;
345};
346
347static int check_register(struct host1x_firewall *fw, unsigned long offset)
348{
349 if (!fw->job->is_addr_reg)
350 return 0;
351
352 if (fw->job->is_addr_reg(fw->dev, fw->class, offset)) {
353 if (!fw->num_relocs)
354 return -EINVAL;
355
356 if (!check_reloc(fw->reloc, fw->cmdbuf, fw->offset))
357 return -EINVAL;
358
359 fw->num_relocs--;
360 fw->reloc++;
361 }
362
363 return 0;
364}
365
366static int check_class(struct host1x_firewall *fw, u32 class)
367{
368 if (!fw->job->is_valid_class) {
369 if (fw->class != class)
370 return -EINVAL;
371 } else {
372 if (!fw->job->is_valid_class(fw->class))
373 return -EINVAL;
374 }
375
376 return 0;
377}
378
379static int check_mask(struct host1x_firewall *fw)
380{
381 u32 mask = fw->mask;
382 u32 reg = fw->reg;
383 int ret;
384
385 while (mask) {
386 if (fw->words == 0)
387 return -EINVAL;
388
389 if (mask & 1) {
390 ret = check_register(fw, reg);
391 if (ret < 0)
392 return ret;
393
394 fw->words--;
395 fw->offset++;
396 }
397 mask >>= 1;
398 reg++;
399 }
400
401 return 0;
402}
403
404static int check_incr(struct host1x_firewall *fw)
405{
406 u32 count = fw->count;
407 u32 reg = fw->reg;
408 int ret;
409
410 while (count) {
411 if (fw->words == 0)
412 return -EINVAL;
413
414 ret = check_register(fw, reg);
415 if (ret < 0)
416 return ret;
417
418 reg++;
419 fw->words--;
420 fw->offset++;
421 count--;
422 }
423
424 return 0;
425}
426
427static int check_nonincr(struct host1x_firewall *fw)
428{
429 u32 count = fw->count;
430 int ret;
431
432 while (count) {
433 if (fw->words == 0)
434 return -EINVAL;
435
436 ret = check_register(fw, fw->reg);
437 if (ret < 0)
438 return ret;
439
440 fw->words--;
441 fw->offset++;
442 count--;
443 }
444
445 return 0;
446}
447
448static int validate(struct host1x_firewall *fw, struct host1x_job_gather *g)
449{
450 u32 *cmdbuf_base = (u32 *)fw->job->gather_copy_mapped +
451 (g->offset / sizeof(u32));
452 u32 job_class = fw->class;
453 int err = 0;
454
455 fw->words = g->words;
456 fw->cmdbuf = g->bo;
457 fw->offset = 0;
458
459 while (fw->words && !err) {
460 u32 word = cmdbuf_base[fw->offset];
461 u32 opcode = (word & 0xf0000000) >> 28;
462
463 fw->mask = 0;
464 fw->reg = 0;
465 fw->count = 0;
466 fw->words--;
467 fw->offset++;
468
469 switch (opcode) {
470 case 0:
471 fw->class = word >> 6 & 0x3ff;
472 fw->mask = word & 0x3f;
473 fw->reg = word >> 16 & 0xfff;
474 err = check_class(fw, job_class);
475 if (!err)
476 err = check_mask(fw);
477 if (err)
478 goto out;
479 break;
480 case 1:
481 fw->reg = word >> 16 & 0xfff;
482 fw->count = word & 0xffff;
483 err = check_incr(fw);
484 if (err)
485 goto out;
486 break;
487
488 case 2:
489 fw->reg = word >> 16 & 0xfff;
490 fw->count = word & 0xffff;
491 err = check_nonincr(fw);
492 if (err)
493 goto out;
494 break;
495
496 case 3:
497 fw->mask = word & 0xffff;
498 fw->reg = word >> 16 & 0xfff;
499 err = check_mask(fw);
500 if (err)
501 goto out;
502 break;
503 case 4:
504 case 14:
505 break;
506 default:
507 err = -EINVAL;
508 break;
509 }
510 }
511
512out:
513 return err;
514}
515
516static inline int copy_gathers(struct device *host, struct host1x_job *job,
517 struct device *dev)
518{
519 struct host1x_firewall fw;
520 size_t size = 0;
521 size_t offset = 0;
522 unsigned int i;
523
524 fw.job = job;
525 fw.dev = dev;
526 fw.reloc = job->relocs;
527 fw.num_relocs = job->num_relocs;
528 fw.class = job->class;
529
530 for (i = 0; i < job->num_gathers; i++) {
531 struct host1x_job_gather *g = &job->gathers[i];
532
533 size += g->words * sizeof(u32);
534 }
535
536
537
538
539
540 job->gather_copy_mapped = dma_alloc_wc(host, size, &job->gather_copy,
541 GFP_NOWAIT);
542
543
544 if (!job->gather_copy_mapped)
545 job->gather_copy_mapped = dma_alloc_wc(host, size,
546 &job->gather_copy,
547 GFP_KERNEL);
548 if (!job->gather_copy_mapped)
549 return -ENOMEM;
550
551 job->gather_copy_size = size;
552
553 for (i = 0; i < job->num_gathers; i++) {
554 struct host1x_job_gather *g = &job->gathers[i];
555 void *gather;
556
557
558 gather = host1x_bo_mmap(g->bo);
559 memcpy(job->gather_copy_mapped + offset, gather + g->offset,
560 g->words * sizeof(u32));
561 host1x_bo_munmap(g->bo, gather);
562
563
564 g->base = job->gather_copy;
565 g->offset = offset;
566
567
568 if (validate(&fw, g))
569 return -EINVAL;
570
571 offset += g->words * sizeof(u32);
572 }
573
574
575 if (fw.num_relocs)
576 return -EINVAL;
577
578 return 0;
579}
580
581int host1x_job_pin(struct host1x_job *job, struct device *dev)
582{
583 int err;
584 unsigned int i, j;
585 struct host1x *host = dev_get_drvdata(dev->parent);
586
587
588 err = pin_job(host, job);
589 if (err)
590 goto out;
591
592 if (IS_ENABLED(CONFIG_TEGRA_HOST1X_FIREWALL)) {
593 err = copy_gathers(host->dev, job, dev);
594 if (err)
595 goto out;
596 }
597
598
599 for (i = 0; i < job->num_gathers; i++) {
600 struct host1x_job_gather *g = &job->gathers[i];
601
602
603 if (g->handled)
604 continue;
605
606
607 if (!IS_ENABLED(CONFIG_TEGRA_HOST1X_FIREWALL))
608 g->base = job->gather_addr_phys[i];
609
610 for (j = i + 1; j < job->num_gathers; j++) {
611 if (job->gathers[j].bo == g->bo) {
612 job->gathers[j].handled = true;
613 job->gathers[j].base = g->base;
614 }
615 }
616
617 err = do_relocs(job, g);
618 if (err)
619 break;
620 }
621
622out:
623 if (err)
624 host1x_job_unpin(job);
625 wmb();
626
627 return err;
628}
629EXPORT_SYMBOL(host1x_job_pin);
630
631void host1x_job_unpin(struct host1x_job *job)
632{
633 struct host1x *host = dev_get_drvdata(job->channel->dev->parent);
634 unsigned int i;
635
636 for (i = 0; i < job->num_unpins; i++) {
637 struct host1x_job_unpin_data *unpin = &job->unpins[i];
638 struct device *dev = unpin->dev ?: host->dev;
639 struct sg_table *sgt = unpin->sgt;
640
641 if (!IS_ENABLED(CONFIG_TEGRA_HOST1X_FIREWALL) &&
642 unpin->size && host->domain) {
643 iommu_unmap(host->domain, job->addr_phys[i],
644 unpin->size);
645 free_iova(&host->iova,
646 iova_pfn(&host->iova, job->addr_phys[i]));
647 }
648
649 if (unpin->dev && sgt)
650 dma_unmap_sg(unpin->dev, sgt->sgl, sgt->nents,
651 unpin->dir);
652
653 host1x_bo_unpin(dev, unpin->bo, sgt);
654 host1x_bo_put(unpin->bo);
655 }
656
657 job->num_unpins = 0;
658
659 if (job->gather_copy_size)
660 dma_free_wc(host->dev, job->gather_copy_size,
661 job->gather_copy_mapped, job->gather_copy);
662}
663EXPORT_SYMBOL(host1x_job_unpin);
664
665
666
667
668void host1x_job_dump(struct device *dev, struct host1x_job *job)
669{
670 dev_dbg(dev, " SYNCPT_ID %d\n", job->syncpt_id);
671 dev_dbg(dev, " SYNCPT_VAL %d\n", job->syncpt_end);
672 dev_dbg(dev, " FIRST_GET 0x%x\n", job->first_get);
673 dev_dbg(dev, " TIMEOUT %d\n", job->timeout);
674 dev_dbg(dev, " NUM_SLOTS %d\n", job->num_slots);
675 dev_dbg(dev, " NUM_HANDLES %d\n", job->num_unpins);
676}
677
