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19#include <linux/dma-mapping.h>
20#include <linux/err.h>
21#include <linux/host1x.h>
22#include <linux/kref.h>
23#include <linux/module.h>
24#include <linux/scatterlist.h>
25#include <linux/slab.h>
26#include <linux/vmalloc.h>
27#include <trace/events/host1x.h>
28
29#include "channel.h"
30#include "dev.h"
31#include "job.h"
32#include "syncpt.h"
33
34struct host1x_job *host1x_job_alloc(struct host1x_channel *ch,
35 u32 num_cmdbufs, u32 num_relocs,
36 u32 num_waitchks)
37{
38 struct host1x_job *job = NULL;
39 unsigned int num_unpins = num_cmdbufs + num_relocs;
40 u64 total;
41 void *mem;
42
43
44 total = sizeof(struct host1x_job) +
45 (u64)num_relocs * sizeof(struct host1x_reloc) +
46 (u64)num_unpins * sizeof(struct host1x_job_unpin_data) +
47 (u64)num_waitchks * sizeof(struct host1x_waitchk) +
48 (u64)num_cmdbufs * sizeof(struct host1x_job_gather) +
49 (u64)num_unpins * sizeof(dma_addr_t) +
50 (u64)num_unpins * sizeof(u32 *);
51 if (total > ULONG_MAX)
52 return NULL;
53
54 mem = job = kzalloc(total, GFP_KERNEL);
55 if (!job)
56 return NULL;
57
58 kref_init(&job->ref);
59 job->channel = ch;
60
61
62 mem += sizeof(struct host1x_job);
63 job->relocarray = num_relocs ? mem : NULL;
64 mem += num_relocs * sizeof(struct host1x_reloc);
65 job->unpins = num_unpins ? mem : NULL;
66 mem += num_unpins * sizeof(struct host1x_job_unpin_data);
67 job->waitchk = num_waitchks ? mem : NULL;
68 mem += num_waitchks * sizeof(struct host1x_waitchk);
69 job->gathers = num_cmdbufs ? mem : NULL;
70 mem += num_cmdbufs * sizeof(struct host1x_job_gather);
71 job->addr_phys = num_unpins ? mem : NULL;
72
73 job->reloc_addr_phys = job->addr_phys;
74 job->gather_addr_phys = &job->addr_phys[num_relocs];
75
76 return job;
77}
78EXPORT_SYMBOL(host1x_job_alloc);
79
80struct host1x_job *host1x_job_get(struct host1x_job *job)
81{
82 kref_get(&job->ref);
83 return job;
84}
85EXPORT_SYMBOL(host1x_job_get);
86
87static void job_free(struct kref *ref)
88{
89 struct host1x_job *job = container_of(ref, struct host1x_job, ref);
90
91 kfree(job);
92}
93
94void host1x_job_put(struct host1x_job *job)
95{
96 kref_put(&job->ref, job_free);
97}
98EXPORT_SYMBOL(host1x_job_put);
99
100void host1x_job_add_gather(struct host1x_job *job, struct host1x_bo *bo,
101 u32 words, u32 offset)
102{
103 struct host1x_job_gather *cur_gather = &job->gathers[job->num_gathers];
104
105 cur_gather->words = words;
106 cur_gather->bo = bo;
107 cur_gather->offset = offset;
108 job->num_gathers++;
109}
110EXPORT_SYMBOL(host1x_job_add_gather);
111
112
113
114
115
116
117
118
119static void host1x_syncpt_patch_offset(struct host1x_syncpt *sp,
120 struct host1x_bo *h, u32 offset)
121{
122 void *patch_addr = NULL;
123
124
125 patch_addr = host1x_bo_kmap(h, offset >> PAGE_SHIFT);
126 if (patch_addr) {
127 host1x_syncpt_patch_wait(sp,
128 patch_addr + (offset & ~PAGE_MASK));
129 host1x_bo_kunmap(h, offset >> PAGE_SHIFT, patch_addr);
130 } else
131 pr_err("Could not map cmdbuf for wait check\n");
132}
133
134
135
136
137
138
139static int do_waitchks(struct host1x_job *job, struct host1x *host,
140 struct host1x_bo *patch)
141{
142 int i;
143
144
145 for (i = 0; i < job->num_waitchk; i++) {
146 struct host1x_waitchk *wait = &job->waitchk[i];
147 struct host1x_syncpt *sp =
148 host1x_syncpt_get(host, wait->syncpt_id);
149
150
151 if (wait->syncpt_id > host1x_syncpt_nb_pts(host))
152 continue;
153
154
155 if (patch != wait->bo)
156 continue;
157
158 trace_host1x_syncpt_wait_check(wait->bo, wait->offset,
159 wait->syncpt_id, wait->thresh,
160 host1x_syncpt_read_min(sp));
161
162 if (host1x_syncpt_is_expired(sp, wait->thresh)) {
163 dev_dbg(host->dev,
164 "drop WAIT id %u (%s) thresh 0x%x, min 0x%x\n",
165 wait->syncpt_id, sp->name, wait->thresh,
166 host1x_syncpt_read_min(sp));
167
168 host1x_syncpt_patch_offset(sp, patch, wait->offset);
169 }
170
171 wait->bo = NULL;
172 }
173
174 return 0;
175}
176
177static unsigned int pin_job(struct host1x *host, struct host1x_job *job)
178{
179 unsigned int i;
180 int err;
181
182 job->num_unpins = 0;
183
184 for (i = 0; i < job->num_relocs; i++) {
185 struct host1x_reloc *reloc = &job->relocarray[i];
186 struct sg_table *sgt;
187 dma_addr_t phys_addr;
188
189 reloc->target.bo = host1x_bo_get(reloc->target.bo);
190 if (!reloc->target.bo) {
191 err = -EINVAL;
192 goto unpin;
193 }
194
195 phys_addr = host1x_bo_pin(reloc->target.bo, &sgt);
196 if (!phys_addr) {
197 err = -EINVAL;
198 goto unpin;
199 }
200
201 job->addr_phys[job->num_unpins] = phys_addr;
202 job->unpins[job->num_unpins].bo = reloc->target.bo;
203 job->unpins[job->num_unpins].sgt = sgt;
204 job->num_unpins++;
205 }
206
207 for (i = 0; i < job->num_gathers; i++) {
208 struct host1x_job_gather *g = &job->gathers[i];
209 size_t gather_size = 0;
210 struct scatterlist *sg;
211 struct sg_table *sgt;
212 dma_addr_t phys_addr;
213 unsigned long shift;
214 struct iova *alloc;
215 unsigned int j;
216
217 g->bo = host1x_bo_get(g->bo);
218 if (!g->bo) {
219 err = -EINVAL;
220 goto unpin;
221 }
222
223 phys_addr = host1x_bo_pin(g->bo, &sgt);
224 if (!phys_addr) {
225 err = -EINVAL;
226 goto unpin;
227 }
228
229 if (!IS_ENABLED(CONFIG_TEGRA_HOST1X_FIREWALL) && host->domain) {
230 for_each_sg(sgt->sgl, sg, sgt->nents, j)
231 gather_size += sg->length;
232 gather_size = iova_align(&host->iova, gather_size);
233
234 shift = iova_shift(&host->iova);
235 alloc = alloc_iova(&host->iova, gather_size >> shift,
236 host->iova_end >> shift, true);
237 if (!alloc) {
238 err = -ENOMEM;
239 goto unpin;
240 }
241
242 err = iommu_map_sg(host->domain,
243 iova_dma_addr(&host->iova, alloc),
244 sgt->sgl, sgt->nents, IOMMU_READ);
245 if (err == 0) {
246 __free_iova(&host->iova, alloc);
247 err = -EINVAL;
248 goto unpin;
249 }
250
251 job->addr_phys[job->num_unpins] =
252 iova_dma_addr(&host->iova, alloc);
253 job->unpins[job->num_unpins].size = gather_size;
254 } else {
255 job->addr_phys[job->num_unpins] = phys_addr;
256 }
257
258 job->gather_addr_phys[i] = job->addr_phys[job->num_unpins];
259
260 job->unpins[job->num_unpins].bo = g->bo;
261 job->unpins[job->num_unpins].sgt = sgt;
262 job->num_unpins++;
263 }
264
265 return 0;
266
267unpin:
268 host1x_job_unpin(job);
269 return err;
270}
271
272static int do_relocs(struct host1x_job *job, struct host1x_bo *cmdbuf)
273{
274 int i = 0;
275 u32 last_page = ~0;
276 void *cmdbuf_page_addr = NULL;
277
278
279 for (i = 0; i < job->num_relocs; i++) {
280 struct host1x_reloc *reloc = &job->relocarray[i];
281 u32 reloc_addr = (job->reloc_addr_phys[i] +
282 reloc->target.offset) >> reloc->shift;
283 u32 *target;
284
285
286 if (cmdbuf != reloc->cmdbuf.bo)
287 continue;
288
289 if (last_page != reloc->cmdbuf.offset >> PAGE_SHIFT) {
290 if (cmdbuf_page_addr)
291 host1x_bo_kunmap(cmdbuf, last_page,
292 cmdbuf_page_addr);
293
294 cmdbuf_page_addr = host1x_bo_kmap(cmdbuf,
295 reloc->cmdbuf.offset >> PAGE_SHIFT);
296 last_page = reloc->cmdbuf.offset >> PAGE_SHIFT;
297
298 if (unlikely(!cmdbuf_page_addr)) {
299 pr_err("Could not map cmdbuf for relocation\n");
300 return -ENOMEM;
301 }
302 }
303
304 target = cmdbuf_page_addr + (reloc->cmdbuf.offset & ~PAGE_MASK);
305 *target = reloc_addr;
306 }
307
308 if (cmdbuf_page_addr)
309 host1x_bo_kunmap(cmdbuf, last_page, cmdbuf_page_addr);
310
311 return 0;
312}
313
314static bool check_reloc(struct host1x_reloc *reloc, struct host1x_bo *cmdbuf,
315 unsigned int offset)
316{
317 offset *= sizeof(u32);
318
319 if (reloc->cmdbuf.bo != cmdbuf || reloc->cmdbuf.offset != offset)
320 return false;
321
322 return true;
323}
324
325struct host1x_firewall {
326 struct host1x_job *job;
327 struct device *dev;
328
329 unsigned int num_relocs;
330 struct host1x_reloc *reloc;
331
332 struct host1x_bo *cmdbuf;
333 unsigned int offset;
334
335 u32 words;
336 u32 class;
337 u32 reg;
338 u32 mask;
339 u32 count;
340};
341
342static int check_register(struct host1x_firewall *fw, unsigned long offset)
343{
344 if (fw->job->is_addr_reg(fw->dev, fw->class, offset)) {
345 if (!fw->num_relocs)
346 return -EINVAL;
347
348 if (!check_reloc(fw->reloc, fw->cmdbuf, fw->offset))
349 return -EINVAL;
350
351 fw->num_relocs--;
352 fw->reloc++;
353 }
354
355 return 0;
356}
357
358static int check_mask(struct host1x_firewall *fw)
359{
360 u32 mask = fw->mask;
361 u32 reg = fw->reg;
362 int ret;
363
364 while (mask) {
365 if (fw->words == 0)
366 return -EINVAL;
367
368 if (mask & 1) {
369 ret = check_register(fw, reg);
370 if (ret < 0)
371 return ret;
372
373 fw->words--;
374 fw->offset++;
375 }
376 mask >>= 1;
377 reg++;
378 }
379
380 return 0;
381}
382
383static int check_incr(struct host1x_firewall *fw)
384{
385 u32 count = fw->count;
386 u32 reg = fw->reg;
387 int ret;
388
389 while (count) {
390 if (fw->words == 0)
391 return -EINVAL;
392
393 ret = check_register(fw, reg);
394 if (ret < 0)
395 return ret;
396
397 reg++;
398 fw->words--;
399 fw->offset++;
400 count--;
401 }
402
403 return 0;
404}
405
406static int check_nonincr(struct host1x_firewall *fw)
407{
408 u32 count = fw->count;
409 int ret;
410
411 while (count) {
412 if (fw->words == 0)
413 return -EINVAL;
414
415 ret = check_register(fw, fw->reg);
416 if (ret < 0)
417 return ret;
418
419 fw->words--;
420 fw->offset++;
421 count--;
422 }
423
424 return 0;
425}
426
427static int validate(struct host1x_firewall *fw, struct host1x_job_gather *g)
428{
429 u32 *cmdbuf_base = (u32 *)fw->job->gather_copy_mapped +
430 (g->offset / sizeof(u32));
431 int err = 0;
432
433 if (!fw->job->is_addr_reg)
434 return 0;
435
436 fw->words = g->words;
437 fw->cmdbuf = g->bo;
438 fw->offset = 0;
439
440 while (fw->words && !err) {
441 u32 word = cmdbuf_base[fw->offset];
442 u32 opcode = (word & 0xf0000000) >> 28;
443
444 fw->mask = 0;
445 fw->reg = 0;
446 fw->count = 0;
447 fw->words--;
448 fw->offset++;
449
450 switch (opcode) {
451 case 0:
452 fw->class = word >> 6 & 0x3ff;
453 fw->mask = word & 0x3f;
454 fw->reg = word >> 16 & 0xfff;
455 err = check_mask(fw);
456 if (err)
457 goto out;
458 break;
459 case 1:
460 fw->reg = word >> 16 & 0xfff;
461 fw->count = word & 0xffff;
462 err = check_incr(fw);
463 if (err)
464 goto out;
465 break;
466
467 case 2:
468 fw->reg = word >> 16 & 0xfff;
469 fw->count = word & 0xffff;
470 err = check_nonincr(fw);
471 if (err)
472 goto out;
473 break;
474
475 case 3:
476 fw->mask = word & 0xffff;
477 fw->reg = word >> 16 & 0xfff;
478 err = check_mask(fw);
479 if (err)
480 goto out;
481 break;
482 case 4:
483 case 5:
484 case 14:
485 break;
486 default:
487 err = -EINVAL;
488 break;
489 }
490 }
491
492out:
493 return err;
494}
495
496static inline int copy_gathers(struct host1x_job *job, struct device *dev)
497{
498 struct host1x_firewall fw;
499 size_t size = 0;
500 size_t offset = 0;
501 int i;
502
503 fw.job = job;
504 fw.dev = dev;
505 fw.reloc = job->relocarray;
506 fw.num_relocs = job->num_relocs;
507 fw.class = 0;
508
509 for (i = 0; i < job->num_gathers; i++) {
510 struct host1x_job_gather *g = &job->gathers[i];
511
512 size += g->words * sizeof(u32);
513 }
514
515 job->gather_copy_mapped = dma_alloc_wc(dev, size, &job->gather_copy,
516 GFP_KERNEL);
517 if (!job->gather_copy_mapped) {
518 job->gather_copy_mapped = NULL;
519 return -ENOMEM;
520 }
521
522 job->gather_copy_size = size;
523
524 for (i = 0; i < job->num_gathers; i++) {
525 struct host1x_job_gather *g = &job->gathers[i];
526 void *gather;
527
528
529 gather = host1x_bo_mmap(g->bo);
530 memcpy(job->gather_copy_mapped + offset, gather + g->offset,
531 g->words * sizeof(u32));
532 host1x_bo_munmap(g->bo, gather);
533
534
535 g->base = job->gather_copy;
536 g->offset = offset;
537
538
539 if (validate(&fw, g))
540 return -EINVAL;
541
542 offset += g->words * sizeof(u32);
543 }
544
545
546 if (fw.num_relocs)
547 return -EINVAL;
548
549 return 0;
550}
551
552int host1x_job_pin(struct host1x_job *job, struct device *dev)
553{
554 int err;
555 unsigned int i, j;
556 struct host1x *host = dev_get_drvdata(dev->parent);
557 DECLARE_BITMAP(waitchk_mask, host1x_syncpt_nb_pts(host));
558
559 bitmap_zero(waitchk_mask, host1x_syncpt_nb_pts(host));
560 for (i = 0; i < job->num_waitchk; i++) {
561 u32 syncpt_id = job->waitchk[i].syncpt_id;
562
563 if (syncpt_id < host1x_syncpt_nb_pts(host))
564 set_bit(syncpt_id, waitchk_mask);
565 }
566
567
568 for_each_set_bit(i, waitchk_mask, host1x_syncpt_nb_pts(host))
569 host1x_syncpt_load(host->syncpt + i);
570
571
572 err = pin_job(host, job);
573 if (err)
574 goto out;
575
576
577 for (i = 0; i < job->num_gathers; i++) {
578 struct host1x_job_gather *g = &job->gathers[i];
579
580
581 if (g->handled)
582 continue;
583
584 g->base = job->gather_addr_phys[i];
585
586 for (j = i + 1; j < job->num_gathers; j++) {
587 if (job->gathers[j].bo == g->bo) {
588 job->gathers[j].handled = true;
589 job->gathers[j].base = g->base;
590 }
591 }
592
593 err = do_relocs(job, g->bo);
594 if (err)
595 break;
596
597 err = do_waitchks(job, host, g->bo);
598 if (err)
599 break;
600 }
601
602 if (IS_ENABLED(CONFIG_TEGRA_HOST1X_FIREWALL) && !err) {
603 err = copy_gathers(job, dev);
604 if (err) {
605 host1x_job_unpin(job);
606 return err;
607 }
608 }
609
610out:
611 wmb();
612
613 return err;
614}
615EXPORT_SYMBOL(host1x_job_pin);
616
617void host1x_job_unpin(struct host1x_job *job)
618{
619 struct host1x *host = dev_get_drvdata(job->channel->dev->parent);
620 unsigned int i;
621
622 for (i = 0; i < job->num_unpins; i++) {
623 struct host1x_job_unpin_data *unpin = &job->unpins[i];
624
625 if (!IS_ENABLED(CONFIG_TEGRA_HOST1X_FIREWALL) && host->domain) {
626 iommu_unmap(host->domain, job->addr_phys[i],
627 unpin->size);
628 free_iova(&host->iova,
629 iova_pfn(&host->iova, job->addr_phys[i]));
630 }
631
632 host1x_bo_unpin(unpin->bo, unpin->sgt);
633 host1x_bo_put(unpin->bo);
634 }
635
636 job->num_unpins = 0;
637
638 if (job->gather_copy_size)
639 dma_free_wc(job->channel->dev, job->gather_copy_size,
640 job->gather_copy_mapped, job->gather_copy);
641}
642EXPORT_SYMBOL(host1x_job_unpin);
643
644
645
646
647void host1x_job_dump(struct device *dev, struct host1x_job *job)
648{
649 dev_dbg(dev, " SYNCPT_ID %d\n", job->syncpt_id);
650 dev_dbg(dev, " SYNCPT_VAL %d\n", job->syncpt_end);
651 dev_dbg(dev, " FIRST_GET 0x%x\n", job->first_get);
652 dev_dbg(dev, " TIMEOUT %d\n", job->timeout);
653 dev_dbg(dev, " NUM_SLOTS %d\n", job->num_slots);
654 dev_dbg(dev, " NUM_HANDLES %d\n", job->num_unpins);
655}
656
