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