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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 for (i = 0; i < job->num_relocs; i++) {
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 (cmdbuf != reloc->cmdbuf)
239 continue;
240
241 if (last_page != reloc->cmdbuf_offset >> PAGE_SHIFT) {
242 if (cmdbuf_page_addr)
243 host1x_bo_kunmap(cmdbuf, last_page,
244 cmdbuf_page_addr);
245
246 cmdbuf_page_addr = host1x_bo_kmap(cmdbuf,
247 reloc->cmdbuf_offset >> PAGE_SHIFT);
248 last_page = reloc->cmdbuf_offset >> PAGE_SHIFT;
249
250 if (unlikely(!cmdbuf_page_addr)) {
251 pr_err("Could not map cmdbuf for relocation\n");
252 return -ENOMEM;
253 }
254 }
255
256 target = cmdbuf_page_addr + (reloc->cmdbuf_offset & ~PAGE_MASK);
257 *target = reloc_addr;
258 }
259
260 if (cmdbuf_page_addr)
261 host1x_bo_kunmap(cmdbuf, last_page, cmdbuf_page_addr);
262
263 return 0;
264}
265
266static bool check_reloc(struct host1x_reloc *reloc, struct host1x_bo *cmdbuf,
267 unsigned int offset)
268{
269 offset *= sizeof(u32);
270
271 if (reloc->cmdbuf != cmdbuf || reloc->cmdbuf_offset != offset)
272 return false;
273
274 return true;
275}
276
277struct host1x_firewall {
278 struct host1x_job *job;
279 struct device *dev;
280
281 unsigned int num_relocs;
282 struct host1x_reloc *reloc;
283
284 struct host1x_bo *cmdbuf_id;
285 unsigned int offset;
286
287 u32 words;
288 u32 class;
289 u32 reg;
290 u32 mask;
291 u32 count;
292};
293
294static int check_mask(struct host1x_firewall *fw)
295{
296 u32 mask = fw->mask;
297 u32 reg = fw->reg;
298
299 while (mask) {
300 if (fw->words == 0)
301 return -EINVAL;
302
303 if (mask & 1) {
304 if (fw->job->is_addr_reg(fw->dev, fw->class, reg)) {
305 if (!fw->num_relocs)
306 return -EINVAL;
307 if (!check_reloc(fw->reloc, fw->cmdbuf_id,
308 fw->offset))
309 return -EINVAL;
310 fw->reloc++;
311 fw->num_relocs--;
312 }
313 fw->words--;
314 fw->offset++;
315 }
316 mask >>= 1;
317 reg++;
318 }
319
320 return 0;
321}
322
323static int check_incr(struct host1x_firewall *fw)
324{
325 u32 count = fw->count;
326 u32 reg = fw->reg;
327
328 while (count) {
329 if (fw->words == 0)
330 return -EINVAL;
331
332 if (fw->job->is_addr_reg(fw->dev, fw->class, reg)) {
333 if (!fw->num_relocs)
334 return -EINVAL;
335 if (!check_reloc(fw->reloc, fw->cmdbuf_id, fw->offset))
336 return -EINVAL;
337 fw->reloc++;
338 fw->num_relocs--;
339 }
340 reg++;
341 fw->words--;
342 fw->offset++;
343 count--;
344 }
345
346 return 0;
347}
348
349static int check_nonincr(struct host1x_firewall *fw)
350{
351 int is_addr_reg = fw->job->is_addr_reg(fw->dev, fw->class, fw->reg);
352 u32 count = fw->count;
353
354 while (count) {
355 if (fw->words == 0)
356 return -EINVAL;
357
358 if (is_addr_reg) {
359 if (!fw->num_relocs)
360 return -EINVAL;
361 if (!check_reloc(fw->reloc, fw->cmdbuf_id, fw->offset))
362 return -EINVAL;
363 fw->reloc++;
364 fw->num_relocs--;
365 }
366 fw->words--;
367 fw->offset++;
368 count--;
369 }
370
371 return 0;
372}
373
374static int validate(struct host1x_firewall *fw, struct host1x_job_gather *g)
375{
376 u32 *cmdbuf_base = (u32 *)fw->job->gather_copy_mapped +
377 (g->offset / sizeof(u32));
378 int err = 0;
379
380 if (!fw->job->is_addr_reg)
381 return 0;
382
383 fw->words = g->words;
384 fw->cmdbuf_id = g->bo;
385 fw->offset = 0;
386
387 while (fw->words && !err) {
388 u32 word = cmdbuf_base[fw->offset];
389 u32 opcode = (word & 0xf0000000) >> 28;
390
391 fw->mask = 0;
392 fw->reg = 0;
393 fw->count = 0;
394 fw->words--;
395 fw->offset++;
396
397 switch (opcode) {
398 case 0:
399 fw->class = word >> 6 & 0x3ff;
400 fw->mask = word & 0x3f;
401 fw->reg = word >> 16 & 0xfff;
402 err = check_mask(fw);
403 if (err)
404 goto out;
405 break;
406 case 1:
407 fw->reg = word >> 16 & 0xfff;
408 fw->count = word & 0xffff;
409 err = check_incr(fw);
410 if (err)
411 goto out;
412 break;
413
414 case 2:
415 fw->reg = word >> 16 & 0xfff;
416 fw->count = word & 0xffff;
417 err = check_nonincr(fw);
418 if (err)
419 goto out;
420 break;
421
422 case 3:
423 fw->mask = word & 0xffff;
424 fw->reg = word >> 16 & 0xfff;
425 err = check_mask(fw);
426 if (err)
427 goto out;
428 break;
429 case 4:
430 case 5:
431 case 14:
432 break;
433 default:
434 err = -EINVAL;
435 break;
436 }
437 }
438
439
440 if (fw->num_relocs)
441 err = -EINVAL;
442
443out:
444 return err;
445}
446
447static inline int copy_gathers(struct host1x_job *job, struct device *dev)
448{
449 struct host1x_firewall fw;
450 size_t size = 0;
451 size_t offset = 0;
452 int i;
453
454 fw.job = job;
455 fw.dev = dev;
456 fw.reloc = job->relocarray;
457 fw.num_relocs = job->num_relocs;
458 fw.class = 0;
459
460 for (i = 0; i < job->num_gathers; i++) {
461 struct host1x_job_gather *g = &job->gathers[i];
462 size += g->words * sizeof(u32);
463 }
464
465 job->gather_copy_mapped = dma_alloc_writecombine(dev, size,
466 &job->gather_copy,
467 GFP_KERNEL);
468 if (!job->gather_copy_mapped) {
469 int err = PTR_ERR(job->gather_copy_mapped);
470 job->gather_copy_mapped = NULL;
471 return err;
472 }
473
474 job->gather_copy_size = size;
475
476 for (i = 0; i < job->num_gathers; i++) {
477 struct host1x_job_gather *g = &job->gathers[i];
478 void *gather;
479
480
481 gather = host1x_bo_mmap(g->bo);
482 memcpy(job->gather_copy_mapped + offset, gather + g->offset,
483 g->words * sizeof(u32));
484 host1x_bo_munmap(g->bo, gather);
485
486
487 g->base = job->gather_copy;
488 g->offset = offset;
489
490
491 if (validate(&fw, g))
492 return -EINVAL;
493
494 offset += g->words * sizeof(u32);
495 }
496
497 return 0;
498}
499
500int host1x_job_pin(struct host1x_job *job, struct device *dev)
501{
502 int err;
503 unsigned int i, j;
504 struct host1x *host = dev_get_drvdata(dev->parent);
505 DECLARE_BITMAP(waitchk_mask, host1x_syncpt_nb_pts(host));
506
507 bitmap_zero(waitchk_mask, host1x_syncpt_nb_pts(host));
508 for (i = 0; i < job->num_waitchk; i++) {
509 u32 syncpt_id = job->waitchk[i].syncpt_id;
510 if (syncpt_id < host1x_syncpt_nb_pts(host))
511 set_bit(syncpt_id, waitchk_mask);
512 }
513
514
515 for_each_set_bit(i, waitchk_mask, host1x_syncpt_nb_pts(host))
516 host1x_syncpt_load(host->syncpt + i);
517
518
519 err = pin_job(job);
520 if (!err)
521 goto out;
522
523
524 for (i = 0; i < job->num_gathers; i++) {
525 struct host1x_job_gather *g = &job->gathers[i];
526
527
528 if (g->handled)
529 continue;
530
531 g->base = job->gather_addr_phys[i];
532
533 for (j = 0; j < job->num_gathers; j++)
534 if (job->gathers[j].bo == g->bo)
535 job->gathers[j].handled = true;
536
537 err = do_relocs(job, g->bo);
538 if (err)
539 break;
540
541 err = do_waitchks(job, host, g->bo);
542 if (err)
543 break;
544 }
545
546 if (IS_ENABLED(CONFIG_TEGRA_HOST1X_FIREWALL) && !err) {
547 err = copy_gathers(job, dev);
548 if (err) {
549 host1x_job_unpin(job);
550 return err;
551 }
552 }
553
554out:
555 wmb();
556
557 return err;
558}
559
560void host1x_job_unpin(struct host1x_job *job)
561{
562 unsigned int i;
563
564 for (i = 0; i < job->num_unpins; i++) {
565 struct host1x_job_unpin_data *unpin = &job->unpins[i];
566 host1x_bo_unpin(unpin->bo, unpin->sgt);
567 host1x_bo_put(unpin->bo);
568 }
569 job->num_unpins = 0;
570
571 if (job->gather_copy_size)
572 dma_free_writecombine(job->channel->dev, job->gather_copy_size,
573 job->gather_copy_mapped,
574 job->gather_copy);
575}
576
577
578
579
580void host1x_job_dump(struct device *dev, struct host1x_job *job)
581{
582 dev_dbg(dev, " SYNCPT_ID %d\n", job->syncpt_id);
583 dev_dbg(dev, " SYNCPT_VAL %d\n", job->syncpt_end);
584 dev_dbg(dev, " FIRST_GET 0x%x\n", job->first_get);
585 dev_dbg(dev, " TIMEOUT %d\n", job->timeout);
586 dev_dbg(dev, " NUM_SLOTS %d\n", job->num_slots);
587 dev_dbg(dev, " NUM_HANDLES %d\n", job->num_unpins);
588}
589
