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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Tegra host1x Job
4 *
5 * Copyright (c) 2010-2015, NVIDIA Corporation.
6 */
7
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_relocs;
31 u64 total;
32 void *mem;
33
34 if (!IS_ENABLED(CONFIG_TEGRA_HOST1X_FIREWALL))
35 num_unpins += num_cmdbufs;
36
37 /* Check that we're not going to overflow */
38 total = sizeof(struct host1x_job) +
39 (u64)num_relocs * sizeof(struct host1x_reloc) +
40 (u64)num_unpins * sizeof(struct host1x_job_unpin_data) +
41 (u64)num_cmdbufs * sizeof(struct host1x_job_gather) +
42 (u64)num_unpins * sizeof(dma_addr_t) +
43 (u64)num_unpins * sizeof(u32 *);
44 if (total > ULONG_MAX)
45 return NULL;
46
47 mem = job = kzalloc(total, GFP_KERNEL);
48 if (!job)
49 return NULL;
50
51 kref_init(&job->ref);
52 job->channel = ch;
53
54 /* Redistribute memory to the structs */
55 mem += sizeof(struct host1x_job);
56 job->relocs = num_relocs ? mem : NULL;
57 mem += num_relocs * sizeof(struct host1x_reloc);
58 job->unpins = num_unpins ? mem : NULL;
59 mem += num_unpins * sizeof(struct host1x_job_unpin_data);
60 job->gathers = num_cmdbufs ? mem : NULL;
61 mem += num_cmdbufs * sizeof(struct host1x_job_gather);
62 job->addr_phys = num_unpins ? mem : NULL;
63
64 job->reloc_addr_phys = job->addr_phys;
65 job->gather_addr_phys = &job->addr_phys[num_relocs];
66
67 return job;
68}
69EXPORT_SYMBOL(host1x_job_alloc);
70
71struct host1x_job *host1x_job_get(struct host1x_job *job)
72{
73 kref_get(&job->ref);
74 return job;
75}
76EXPORT_SYMBOL(host1x_job_get);
77
78static void job_free(struct kref *ref)
79{
80 struct host1x_job *job = container_of(ref, struct host1x_job, ref);
81
82 kfree(job);
83}
84
85void host1x_job_put(struct host1x_job *job)
86{
87 kref_put(&job->ref, job_free);
88}
89EXPORT_SYMBOL(host1x_job_put);
90
91void host1x_job_add_gather(struct host1x_job *job, struct host1x_bo *bo,
92 unsigned int words, unsigned int offset)
93{
94 struct host1x_job_gather *gather = &job->gathers[job->num_gathers];
95
96 gather->words = words;
97 gather->bo = bo;
98 gather->offset = offset;
99
100 job->num_gathers++;
101}
102EXPORT_SYMBOL(host1x_job_add_gather);
103
104static unsigned int pin_job(struct host1x *host, struct host1x_job *job)
105{
106 struct host1x_client *client = job->client;
107 struct device *dev = client->dev;
108 struct host1x_job_gather *g;
109 struct iommu_domain *domain;
110 unsigned int i;
111 int err;
112
113 domain = iommu_get_domain_for_dev(dev);
114 job->num_unpins = 0;
115
116 for (i = 0; i < job->num_relocs; i++) {
117 struct host1x_reloc *reloc = &job->relocs[i];
118 dma_addr_t phys_addr, *phys;
119 struct sg_table *sgt;
120
121 reloc->target.bo = host1x_bo_get(reloc->target.bo);
122 if (!reloc->target.bo) {
123 err = -EINVAL;
124 goto unpin;
125 }
126
127 /*
128 * If the client device is not attached to an IOMMU, the
129 * physical address of the buffer object can be used.
130 *
131 * Similarly, when an IOMMU domain is shared between all
132 * host1x clients, the IOVA is already available, so no
133 * need to map the buffer object again.
134 *
135 * XXX Note that this isn't always safe to do because it
136 * relies on an assumption that no cache maintenance is
137 * needed on the buffer objects.
138 */
139 if (!domain || client->group)
140 phys = &phys_addr;
141 else
142 phys = NULL;
143
144 sgt = host1x_bo_pin(dev, reloc->target.bo, phys);
145 if (IS_ERR(sgt)) {
146 err = PTR_ERR(sgt);
147 goto unpin;
148 }
149
150 if (sgt) {
151 unsigned long mask = HOST1X_RELOC_READ |
152 HOST1X_RELOC_WRITE;
153 enum dma_data_direction dir;
154
155 switch (reloc->flags & mask) {
156 case HOST1X_RELOC_READ:
157 dir = DMA_TO_DEVICE;
158 break;
159
160 case HOST1X_RELOC_WRITE:
161 dir = DMA_FROM_DEVICE;
162 break;
163
164 case HOST1X_RELOC_READ | HOST1X_RELOC_WRITE:
165 dir = DMA_BIDIRECTIONAL;
166 break;
167
168 default:
169 err = -EINVAL;
170 goto unpin;
171 }
172
173 err = dma_map_sg(dev, sgt->sgl, sgt->nents, dir);
174 if (!err) {
175 err = -ENOMEM;
176 goto unpin;
177 }
178
179 job->unpins[job->num_unpins].dev = dev;
180 job->unpins[job->num_unpins].dir = dir;
181 phys_addr = sg_dma_address(sgt->sgl);
182 }
183
184 job->addr_phys[job->num_unpins] = phys_addr;
185 job->unpins[job->num_unpins].bo = reloc->target.bo;
186 job->unpins[job->num_unpins].sgt = sgt;
187 job->num_unpins++;
188 }
189
190 /*
191 * We will copy gathers BO content later, so there is no need to
192 * hold and pin them.
193 */
194 if (IS_ENABLED(CONFIG_TEGRA_HOST1X_FIREWALL))
195 return 0;
196
197 for (i = 0; i < job->num_gathers; i++) {
198 size_t gather_size = 0;
199 struct scatterlist *sg;
200 struct sg_table *sgt;
201 dma_addr_t phys_addr;
202 unsigned long shift;
203 struct iova *alloc;
204 dma_addr_t *phys;
205 unsigned int j;
206
207 g = &job->gathers[i];
208 g->bo = host1x_bo_get(g->bo);
209 if (!g->bo) {
210 err = -EINVAL;
211 goto unpin;
212 }
213
214 /**
215 * If the host1x is not attached to an IOMMU, there is no need
216 * to map the buffer object for the host1x, since the physical
217 * address can simply be used.
218 */
219 if (!iommu_get_domain_for_dev(host->dev))
220 phys = &phys_addr;
221 else
222 phys = NULL;
223
224 sgt = host1x_bo_pin(host->dev, g->bo, phys);
225 if (IS_ERR(sgt)) {
226 err = PTR_ERR(sgt);
227 goto put;
228 }
229
230 if (host->domain) {
231 for_each_sg(sgt->sgl, sg, sgt->nents, j)
232 gather_size += sg->length;
233 gather_size = iova_align(&host->iova, gather_size);
234
235 shift = iova_shift(&host->iova);
236 alloc = alloc_iova(&host->iova, gather_size >> shift,
237 host->iova_end >> shift, true);
238 if (!alloc) {
239 err = -ENOMEM;
240 goto put;
241 }
242
243 err = iommu_map_sg(host->domain,
244 iova_dma_addr(&host->iova, alloc),
245 sgt->sgl, sgt->nents, IOMMU_READ);
246 if (err == 0) {
247 __free_iova(&host->iova, alloc);
248 err = -EINVAL;
249 goto put;
250 }
251
252 job->unpins[job->num_unpins].size = gather_size;
253 phys_addr = iova_dma_addr(&host->iova, alloc);
254 } else if (sgt) {
255 err = dma_map_sg(host->dev, sgt->sgl, sgt->nents,
256 DMA_TO_DEVICE);
257 if (!err) {
258 err = -ENOMEM;
259 goto put;
260 }
261
262 job->unpins[job->num_unpins].dir = DMA_TO_DEVICE;
263 job->unpins[job->num_unpins].dev = host->dev;
264 phys_addr = sg_dma_address(sgt->sgl);
265 }
266
267 job->addr_phys[job->num_unpins] = phys_addr;
268 job->gather_addr_phys[i] = phys_addr;
269
270 job->unpins[job->num_unpins].bo = g->bo;
271 job->unpins[job->num_unpins].sgt = sgt;
272 job->num_unpins++;
273 }
274
275 return 0;
276
277put:
278 host1x_bo_put(g->bo);
279unpin:
280 host1x_job_unpin(job);
281 return err;
282}
283
284static int do_relocs(struct host1x_job *job, struct host1x_job_gather *g)
285{
286 void *cmdbuf_addr = NULL;
287 struct host1x_bo *cmdbuf = g->bo;
288 unsigned int i;
289
290 /* pin & patch the relocs for one gather */
291 for (i = 0; i < job->num_relocs; i++) {
292 struct host1x_reloc *reloc = &job->relocs[i];
293 u32 reloc_addr = (job->reloc_addr_phys[i] +
294 reloc->target.offset) >> reloc->shift;
295 u32 *target;
296
297 /* skip all other gathers */
298 if (cmdbuf != reloc->cmdbuf.bo)
299 continue;
300
301 if (IS_ENABLED(CONFIG_TEGRA_HOST1X_FIREWALL)) {
302 target = (u32 *)job->gather_copy_mapped +
303 reloc->cmdbuf.offset / sizeof(u32) +
304 g->offset / sizeof(u32);
305 goto patch_reloc;
306 }
307
308 if (!cmdbuf_addr) {
309 cmdbuf_addr = host1x_bo_mmap(cmdbuf);
310
311 if (unlikely(!cmdbuf_addr)) {
312 pr_err("Could not map cmdbuf for relocation\n");
313 return -ENOMEM;
314 }
315 }
316
317 target = cmdbuf_addr + reloc->cmdbuf.offset;
318patch_reloc:
319 *target = reloc_addr;
320 }
321
322 if (cmdbuf_addr)
323 host1x_bo_munmap(cmdbuf, cmdbuf_addr);
324
325 return 0;
326}
327
328static bool check_reloc(struct host1x_reloc *reloc, struct host1x_bo *cmdbuf,
329 unsigned int offset)
330{
331 offset *= sizeof(u32);
332
333 if (reloc->cmdbuf.bo != cmdbuf || reloc->cmdbuf.offset != offset)
334 return false;
335
336 /* relocation shift value validation isn't implemented yet */
337 if (reloc->shift)
338 return false;
339
340 return true;
341}
342
343struct host1x_firewall {
344 struct host1x_job *job;
345 struct device *dev;
346
347 unsigned int num_relocs;
348 struct host1x_reloc *reloc;
349
350 struct host1x_bo *cmdbuf;
351 unsigned int offset;
352
353 u32 words;
354 u32 class;
355 u32 reg;
356 u32 mask;
357 u32 count;
358};
359
360static int check_register(struct host1x_firewall *fw, unsigned long offset)
361{
362 if (!fw->job->is_addr_reg)
363 return 0;
364
365 if (fw->job->is_addr_reg(fw->dev, fw->class, offset)) {
366 if (!fw->num_relocs)
367 return -EINVAL;
368
369 if (!check_reloc(fw->reloc, fw->cmdbuf, fw->offset))
370 return -EINVAL;
371
372 fw->num_relocs--;
373 fw->reloc++;
374 }
375
376 return 0;
377}
378
379static int check_class(struct host1x_firewall *fw, u32 class)
380{
381 if (!fw->job->is_valid_class) {
382 if (fw->class != class)
383 return -EINVAL;
384 } else {
385 if (!fw->job->is_valid_class(fw->class))
386 return -EINVAL;
387 }
388
389 return 0;
390}
391
392static int check_mask(struct host1x_firewall *fw)
393{
394 u32 mask = fw->mask;
395 u32 reg = fw->reg;
396 int ret;
397
398 while (mask) {
399 if (fw->words == 0)
400 return -EINVAL;
401
402 if (mask & 1) {
403 ret = check_register(fw, reg);
404 if (ret < 0)
405 return ret;
406
407 fw->words--;
408 fw->offset++;
409 }
410 mask >>= 1;
411 reg++;
412 }
413
414 return 0;
415}
416
417static int check_incr(struct host1x_firewall *fw)
418{
419 u32 count = fw->count;
420 u32 reg = fw->reg;
421 int ret;
422
423 while (count) {
424 if (fw->words == 0)
425 return -EINVAL;
426
427 ret = check_register(fw, reg);
428 if (ret < 0)
429 return ret;
430
431 reg++;
432 fw->words--;
433 fw->offset++;
434 count--;
435 }
436
437 return 0;
438}
439
440static int check_nonincr(struct host1x_firewall *fw)
441{
442 u32 count = fw->count;
443 int ret;
444
445 while (count) {
446 if (fw->words == 0)
447 return -EINVAL;
448
449 ret = check_register(fw, fw->reg);
450 if (ret < 0)
451 return ret;
452
453 fw->words--;
454 fw->offset++;
455 count--;
456 }
457
458 return 0;
459}
460
461static int validate(struct host1x_firewall *fw, struct host1x_job_gather *g)
462{
463 u32 *cmdbuf_base = (u32 *)fw->job->gather_copy_mapped +
464 (g->offset / sizeof(u32));
465 u32 job_class = fw->class;
466 int err = 0;
467
468 fw->words = g->words;
469 fw->cmdbuf = g->bo;
470 fw->offset = 0;
471
472 while (fw->words && !err) {
473 u32 word = cmdbuf_base[fw->offset];
474 u32 opcode = (word & 0xf0000000) >> 28;
475
476 fw->mask = 0;
477 fw->reg = 0;
478 fw->count = 0;
479 fw->words--;
480 fw->offset++;
481
482 switch (opcode) {
483 case 0:
484 fw->class = word >> 6 & 0x3ff;
485 fw->mask = word & 0x3f;
486 fw->reg = word >> 16 & 0xfff;
487 err = check_class(fw, job_class);
488 if (!err)
489 err = check_mask(fw);
490 if (err)
491 goto out;
492 break;
493 case 1:
494 fw->reg = word >> 16 & 0xfff;
495 fw->count = word & 0xffff;
496 err = check_incr(fw);
497 if (err)
498 goto out;
499 break;
500
501 case 2:
502 fw->reg = word >> 16 & 0xfff;
503 fw->count = word & 0xffff;
504 err = check_nonincr(fw);
505 if (err)
506 goto out;
507 break;
508
509 case 3:
510 fw->mask = word & 0xffff;
511 fw->reg = word >> 16 & 0xfff;
512 err = check_mask(fw);
513 if (err)
514 goto out;
515 break;
516 case 4:
517 case 14:
518 break;
519 default:
520 err = -EINVAL;
521 break;
522 }
523 }
524
525out:
526 return err;
527}
528
529static inline int copy_gathers(struct device *host, struct host1x_job *job,
530 struct device *dev)
531{
532 struct host1x_firewall fw;
533 size_t size = 0;
534 size_t offset = 0;
535 unsigned int i;
536
537 fw.job = job;
538 fw.dev = dev;
539 fw.reloc = job->relocs;
540 fw.num_relocs = job->num_relocs;
541 fw.class = job->class;
542
543 for (i = 0; i < job->num_gathers; i++) {
544 struct host1x_job_gather *g = &job->gathers[i];
545
546 size += g->words * sizeof(u32);
547 }
548
549 /*
550 * Try a non-blocking allocation from a higher priority pools first,
551 * as awaiting for the allocation here is a major performance hit.
552 */
553 job->gather_copy_mapped = dma_alloc_wc(host, size, &job->gather_copy,
554 GFP_NOWAIT);
555
556 /* the higher priority allocation failed, try the generic-blocking */
557 if (!job->gather_copy_mapped)
558 job->gather_copy_mapped = dma_alloc_wc(host, size,
559 &job->gather_copy,
560 GFP_KERNEL);
561 if (!job->gather_copy_mapped)
562 return -ENOMEM;
563
564 job->gather_copy_size = size;
565
566 for (i = 0; i < job->num_gathers; i++) {
567 struct host1x_job_gather *g = &job->gathers[i];
568 void *gather;
569
570 /* Copy the gather */
571 gather = host1x_bo_mmap(g->bo);
572 memcpy(job->gather_copy_mapped + offset, gather + g->offset,
573 g->words * sizeof(u32));
574 host1x_bo_munmap(g->bo, gather);
575
576 /* Store the location in the buffer */
577 g->base = job->gather_copy;
578 g->offset = offset;
579
580 /* Validate the job */
581 if (validate(&fw, g))
582 return -EINVAL;
583
584 offset += g->words * sizeof(u32);
585 }
586
587 /* No relocs should remain at this point */
588 if (fw.num_relocs)
589 return -EINVAL;
590
591 return 0;
592}
593
594int host1x_job_pin(struct host1x_job *job, struct device *dev)
595{
596 int err;
597 unsigned int i, j;
598 struct host1x *host = dev_get_drvdata(dev->parent);
599
600 /* pin memory */
601 err = pin_job(host, job);
602 if (err)
603 goto out;
604
605 if (IS_ENABLED(CONFIG_TEGRA_HOST1X_FIREWALL)) {
606 err = copy_gathers(host->dev, job, dev);
607 if (err)
608 goto out;
609 }
610
611 /* patch gathers */
612 for (i = 0; i < job->num_gathers; i++) {
613 struct host1x_job_gather *g = &job->gathers[i];
614
615 /* process each gather mem only once */
616 if (g->handled)
617 continue;
618
619 /* copy_gathers() sets gathers base if firewall is enabled */
620 if (!IS_ENABLED(CONFIG_TEGRA_HOST1X_FIREWALL))
621 g->base = job->gather_addr_phys[i];
622
623 for (j = i + 1; j < job->num_gathers; j++) {
624 if (job->gathers[j].bo == g->bo) {
625 job->gathers[j].handled = true;
626 job->gathers[j].base = g->base;
627 }
628 }
629
630 err = do_relocs(job, g);
631 if (err)
632 break;
633 }
634
635out:
636 if (err)
637 host1x_job_unpin(job);
638 wmb();
639
640 return err;
641}
642EXPORT_SYMBOL(host1x_job_pin);
643
644void host1x_job_unpin(struct host1x_job *job)
645{
646 struct host1x *host = dev_get_drvdata(job->channel->dev->parent);
647 unsigned int i;
648
649 for (i = 0; i < job->num_unpins; i++) {
650 struct host1x_job_unpin_data *unpin = &job->unpins[i];
651 struct device *dev = unpin->dev ?: host->dev;
652 struct sg_table *sgt = unpin->sgt;
653
654 if (!IS_ENABLED(CONFIG_TEGRA_HOST1X_FIREWALL) &&
655 unpin->size && host->domain) {
656 iommu_unmap(host->domain, job->addr_phys[i],
657 unpin->size);
658 free_iova(&host->iova,
659 iova_pfn(&host->iova, job->addr_phys[i]));
660 }
661
662 if (unpin->dev && sgt)
663 dma_unmap_sg(unpin->dev, sgt->sgl, sgt->nents,
664 unpin->dir);
665
666 host1x_bo_unpin(dev, unpin->bo, sgt);
667 host1x_bo_put(unpin->bo);
668 }
669
670 job->num_unpins = 0;
671
672 if (job->gather_copy_size)
673 dma_free_wc(host->dev, job->gather_copy_size,
674 job->gather_copy_mapped, job->gather_copy);
675}
676EXPORT_SYMBOL(host1x_job_unpin);
677
678/*
679 * Debug routine used to dump job entries
680 */
681void host1x_job_dump(struct device *dev, struct host1x_job *job)
682{
683 dev_dbg(dev, " SYNCPT_ID %d\n", job->syncpt_id);
684 dev_dbg(dev, " SYNCPT_VAL %d\n", job->syncpt_end);
685 dev_dbg(dev, " FIRST_GET 0x%x\n", job->first_get);
686 dev_dbg(dev, " TIMEOUT %d\n", job->timeout);
687 dev_dbg(dev, " NUM_SLOTS %d\n", job->num_slots);
688 dev_dbg(dev, " NUM_HANDLES %d\n", job->num_unpins);
689}
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Tegra host1x Job
4 *
5 * Copyright (c) 2010-2015, NVIDIA Corporation.
6 */
7
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 bool skip_firewall)
29{
30 struct host1x_job *job = NULL;
31 unsigned int num_unpins = num_relocs;
32 bool enable_firewall;
33 u64 total;
34 void *mem;
35
36 enable_firewall = IS_ENABLED(CONFIG_TEGRA_HOST1X_FIREWALL) && !skip_firewall;
37
38 if (!enable_firewall)
39 num_unpins += num_cmdbufs;
40
41 /* Check that we're not going to overflow */
42 total = sizeof(struct host1x_job) +
43 (u64)num_relocs * sizeof(struct host1x_reloc) +
44 (u64)num_unpins * sizeof(struct host1x_job_unpin_data) +
45 (u64)num_cmdbufs * sizeof(struct host1x_job_cmd) +
46 (u64)num_unpins * sizeof(dma_addr_t) +
47 (u64)num_unpins * sizeof(u32 *);
48 if (total > ULONG_MAX)
49 return NULL;
50
51 mem = job = kzalloc(total, GFP_KERNEL);
52 if (!job)
53 return NULL;
54
55 job->enable_firewall = enable_firewall;
56
57 kref_init(&job->ref);
58 job->channel = ch;
59
60 /* Redistribute memory to the structs */
61 mem += sizeof(struct host1x_job);
62 job->relocs = num_relocs ? mem : NULL;
63 mem += num_relocs * sizeof(struct host1x_reloc);
64 job->unpins = num_unpins ? mem : NULL;
65 mem += num_unpins * sizeof(struct host1x_job_unpin_data);
66 job->cmds = num_cmdbufs ? mem : NULL;
67 mem += num_cmdbufs * sizeof(struct host1x_job_cmd);
68 job->addr_phys = num_unpins ? mem : NULL;
69
70 job->reloc_addr_phys = job->addr_phys;
71 job->gather_addr_phys = &job->addr_phys[num_relocs];
72
73 return job;
74}
75EXPORT_SYMBOL(host1x_job_alloc);
76
77struct host1x_job *host1x_job_get(struct host1x_job *job)
78{
79 kref_get(&job->ref);
80 return job;
81}
82EXPORT_SYMBOL(host1x_job_get);
83
84static void job_free(struct kref *ref)
85{
86 struct host1x_job *job = container_of(ref, struct host1x_job, ref);
87
88 if (job->release)
89 job->release(job);
90
91 if (job->fence) {
92 /*
93 * remove_callback is atomic w.r.t. fence signaling, so
94 * after the call returns, we know that the callback is not
95 * in execution, and the fence can be safely freed.
96 */
97 dma_fence_remove_callback(job->fence, &job->fence_cb);
98 dma_fence_put(job->fence);
99 }
100
101 if (job->syncpt)
102 host1x_syncpt_put(job->syncpt);
103
104 kfree(job);
105}
106
107void host1x_job_put(struct host1x_job *job)
108{
109 kref_put(&job->ref, job_free);
110}
111EXPORT_SYMBOL(host1x_job_put);
112
113void host1x_job_add_gather(struct host1x_job *job, struct host1x_bo *bo,
114 unsigned int words, unsigned int offset)
115{
116 struct host1x_job_gather *gather = &job->cmds[job->num_cmds].gather;
117
118 gather->words = words;
119 gather->bo = bo;
120 gather->offset = offset;
121
122 job->num_cmds++;
123}
124EXPORT_SYMBOL(host1x_job_add_gather);
125
126void host1x_job_add_wait(struct host1x_job *job, u32 id, u32 thresh,
127 bool relative, u32 next_class)
128{
129 struct host1x_job_cmd *cmd = &job->cmds[job->num_cmds];
130
131 cmd->is_wait = true;
132 cmd->wait.id = id;
133 cmd->wait.threshold = thresh;
134 cmd->wait.next_class = next_class;
135 cmd->wait.relative = relative;
136
137 job->num_cmds++;
138}
139EXPORT_SYMBOL(host1x_job_add_wait);
140
141static unsigned int pin_job(struct host1x *host, struct host1x_job *job)
142{
143 unsigned long mask = HOST1X_RELOC_READ | HOST1X_RELOC_WRITE;
144 struct host1x_client *client = job->client;
145 struct device *dev = client->dev;
146 struct host1x_job_gather *g;
147 unsigned int i;
148 int err;
149
150 job->num_unpins = 0;
151
152 for (i = 0; i < job->num_relocs; i++) {
153 struct host1x_reloc *reloc = &job->relocs[i];
154 enum dma_data_direction direction;
155 struct host1x_bo_mapping *map;
156 struct host1x_bo *bo;
157
158 reloc->target.bo = host1x_bo_get(reloc->target.bo);
159 if (!reloc->target.bo) {
160 err = -EINVAL;
161 goto unpin;
162 }
163
164 bo = reloc->target.bo;
165
166 switch (reloc->flags & mask) {
167 case HOST1X_RELOC_READ:
168 direction = DMA_TO_DEVICE;
169 break;
170
171 case HOST1X_RELOC_WRITE:
172 direction = DMA_FROM_DEVICE;
173 break;
174
175 case HOST1X_RELOC_READ | HOST1X_RELOC_WRITE:
176 direction = DMA_BIDIRECTIONAL;
177 break;
178
179 default:
180 err = -EINVAL;
181 goto unpin;
182 }
183
184 map = host1x_bo_pin(dev, bo, direction, NULL);
185 if (IS_ERR(map)) {
186 err = PTR_ERR(map);
187 goto unpin;
188 }
189
190 /*
191 * host1x clients are generally not able to do scatter-gather themselves, so fail
192 * if the buffer is discontiguous and we fail to map its SG table to a single
193 * contiguous chunk of I/O virtual memory.
194 */
195 if (map->chunks > 1) {
196 err = -EINVAL;
197 goto unpin;
198 }
199
200 job->addr_phys[job->num_unpins] = map->phys;
201 job->unpins[job->num_unpins].map = map;
202 job->num_unpins++;
203 }
204
205 /*
206 * We will copy gathers BO content later, so there is no need to
207 * hold and pin them.
208 */
209 if (job->enable_firewall)
210 return 0;
211
212 for (i = 0; i < job->num_cmds; i++) {
213 struct host1x_bo_mapping *map;
214 size_t gather_size = 0;
215 struct scatterlist *sg;
216 unsigned long shift;
217 struct iova *alloc;
218 unsigned int j;
219
220 if (job->cmds[i].is_wait)
221 continue;
222
223 g = &job->cmds[i].gather;
224
225 g->bo = host1x_bo_get(g->bo);
226 if (!g->bo) {
227 err = -EINVAL;
228 goto unpin;
229 }
230
231 map = host1x_bo_pin(host->dev, g->bo, DMA_TO_DEVICE, NULL);
232 if (IS_ERR(map)) {
233 err = PTR_ERR(map);
234 goto unpin;
235 }
236
237 if (host->domain) {
238 for_each_sgtable_sg(map->sgt, sg, j)
239 gather_size += sg->length;
240
241 gather_size = iova_align(&host->iova, gather_size);
242
243 shift = iova_shift(&host->iova);
244 alloc = alloc_iova(&host->iova, gather_size >> shift,
245 host->iova_end >> shift, true);
246 if (!alloc) {
247 err = -ENOMEM;
248 goto put;
249 }
250
251 err = iommu_map_sgtable(host->domain, iova_dma_addr(&host->iova, alloc),
252 map->sgt, IOMMU_READ);
253 if (err == 0) {
254 __free_iova(&host->iova, alloc);
255 err = -EINVAL;
256 goto put;
257 }
258
259 map->phys = iova_dma_addr(&host->iova, alloc);
260 map->size = gather_size;
261 }
262
263 job->addr_phys[job->num_unpins] = map->phys;
264 job->unpins[job->num_unpins].map = map;
265 job->num_unpins++;
266
267 job->gather_addr_phys[i] = map->phys;
268 }
269
270 return 0;
271
272put:
273 host1x_bo_put(g->bo);
274unpin:
275 host1x_job_unpin(job);
276 return err;
277}
278
279static int do_relocs(struct host1x_job *job, struct host1x_job_gather *g)
280{
281 void *cmdbuf_addr = NULL;
282 struct host1x_bo *cmdbuf = g->bo;
283 unsigned int i;
284
285 /* pin & patch the relocs for one gather */
286 for (i = 0; i < job->num_relocs; i++) {
287 struct host1x_reloc *reloc = &job->relocs[i];
288 u32 reloc_addr = (job->reloc_addr_phys[i] +
289 reloc->target.offset) >> reloc->shift;
290 u32 *target;
291
292 /* skip all other gathers */
293 if (cmdbuf != reloc->cmdbuf.bo)
294 continue;
295
296 if (job->enable_firewall) {
297 target = (u32 *)job->gather_copy_mapped +
298 reloc->cmdbuf.offset / sizeof(u32) +
299 g->offset / sizeof(u32);
300 goto patch_reloc;
301 }
302
303 if (!cmdbuf_addr) {
304 cmdbuf_addr = host1x_bo_mmap(cmdbuf);
305
306 if (unlikely(!cmdbuf_addr)) {
307 pr_err("Could not map cmdbuf for relocation\n");
308 return -ENOMEM;
309 }
310 }
311
312 target = cmdbuf_addr + reloc->cmdbuf.offset;
313patch_reloc:
314 *target = reloc_addr;
315 }
316
317 if (cmdbuf_addr)
318 host1x_bo_munmap(cmdbuf, cmdbuf_addr);
319
320 return 0;
321}
322
323static bool check_reloc(struct host1x_reloc *reloc, struct host1x_bo *cmdbuf,
324 unsigned int offset)
325{
326 offset *= sizeof(u32);
327
328 if (reloc->cmdbuf.bo != cmdbuf || reloc->cmdbuf.offset != offset)
329 return false;
330
331 /* relocation shift value validation isn't implemented yet */
332 if (reloc->shift)
333 return false;
334
335 return true;
336}
337
338struct host1x_firewall {
339 struct host1x_job *job;
340 struct device *dev;
341
342 unsigned int num_relocs;
343 struct host1x_reloc *reloc;
344
345 struct host1x_bo *cmdbuf;
346 unsigned int offset;
347
348 u32 words;
349 u32 class;
350 u32 reg;
351 u32 mask;
352 u32 count;
353};
354
355static int check_register(struct host1x_firewall *fw, unsigned long offset)
356{
357 if (!fw->job->is_addr_reg)
358 return 0;
359
360 if (fw->job->is_addr_reg(fw->dev, fw->class, offset)) {
361 if (!fw->num_relocs)
362 return -EINVAL;
363
364 if (!check_reloc(fw->reloc, fw->cmdbuf, fw->offset))
365 return -EINVAL;
366
367 fw->num_relocs--;
368 fw->reloc++;
369 }
370
371 return 0;
372}
373
374static int check_class(struct host1x_firewall *fw, u32 class)
375{
376 if (!fw->job->is_valid_class) {
377 if (fw->class != class)
378 return -EINVAL;
379 } else {
380 if (!fw->job->is_valid_class(fw->class))
381 return -EINVAL;
382 }
383
384 return 0;
385}
386
387static int check_mask(struct host1x_firewall *fw)
388{
389 u32 mask = fw->mask;
390 u32 reg = fw->reg;
391 int ret;
392
393 while (mask) {
394 if (fw->words == 0)
395 return -EINVAL;
396
397 if (mask & 1) {
398 ret = check_register(fw, reg);
399 if (ret < 0)
400 return ret;
401
402 fw->words--;
403 fw->offset++;
404 }
405 mask >>= 1;
406 reg++;
407 }
408
409 return 0;
410}
411
412static int check_incr(struct host1x_firewall *fw)
413{
414 u32 count = fw->count;
415 u32 reg = fw->reg;
416 int ret;
417
418 while (count) {
419 if (fw->words == 0)
420 return -EINVAL;
421
422 ret = check_register(fw, reg);
423 if (ret < 0)
424 return ret;
425
426 reg++;
427 fw->words--;
428 fw->offset++;
429 count--;
430 }
431
432 return 0;
433}
434
435static int check_nonincr(struct host1x_firewall *fw)
436{
437 u32 count = fw->count;
438 int ret;
439
440 while (count) {
441 if (fw->words == 0)
442 return -EINVAL;
443
444 ret = check_register(fw, fw->reg);
445 if (ret < 0)
446 return ret;
447
448 fw->words--;
449 fw->offset++;
450 count--;
451 }
452
453 return 0;
454}
455
456static int validate(struct host1x_firewall *fw, struct host1x_job_gather *g)
457{
458 u32 *cmdbuf_base = (u32 *)fw->job->gather_copy_mapped +
459 (g->offset / sizeof(u32));
460 u32 job_class = fw->class;
461 int err = 0;
462
463 fw->words = g->words;
464 fw->cmdbuf = g->bo;
465 fw->offset = 0;
466
467 while (fw->words && !err) {
468 u32 word = cmdbuf_base[fw->offset];
469 u32 opcode = (word & 0xf0000000) >> 28;
470
471 fw->mask = 0;
472 fw->reg = 0;
473 fw->count = 0;
474 fw->words--;
475 fw->offset++;
476
477 switch (opcode) {
478 case 0:
479 fw->class = word >> 6 & 0x3ff;
480 fw->mask = word & 0x3f;
481 fw->reg = word >> 16 & 0xfff;
482 err = check_class(fw, job_class);
483 if (!err)
484 err = check_mask(fw);
485 if (err)
486 goto out;
487 break;
488 case 1:
489 fw->reg = word >> 16 & 0xfff;
490 fw->count = word & 0xffff;
491 err = check_incr(fw);
492 if (err)
493 goto out;
494 break;
495
496 case 2:
497 fw->reg = word >> 16 & 0xfff;
498 fw->count = word & 0xffff;
499 err = check_nonincr(fw);
500 if (err)
501 goto out;
502 break;
503
504 case 3:
505 fw->mask = word & 0xffff;
506 fw->reg = word >> 16 & 0xfff;
507 err = check_mask(fw);
508 if (err)
509 goto out;
510 break;
511 case 4:
512 case 14:
513 break;
514 default:
515 err = -EINVAL;
516 break;
517 }
518 }
519
520out:
521 return err;
522}
523
524static inline int copy_gathers(struct device *host, struct host1x_job *job,
525 struct device *dev)
526{
527 struct host1x_firewall fw;
528 size_t size = 0;
529 size_t offset = 0;
530 unsigned int i;
531
532 fw.job = job;
533 fw.dev = dev;
534 fw.reloc = job->relocs;
535 fw.num_relocs = job->num_relocs;
536 fw.class = job->class;
537
538 for (i = 0; i < job->num_cmds; i++) {
539 struct host1x_job_gather *g;
540
541 if (job->cmds[i].is_wait)
542 continue;
543
544 g = &job->cmds[i].gather;
545
546 size += g->words * sizeof(u32);
547 }
548
549 /*
550 * Try a non-blocking allocation from a higher priority pools first,
551 * as awaiting for the allocation here is a major performance hit.
552 */
553 job->gather_copy_mapped = dma_alloc_wc(host, size, &job->gather_copy,
554 GFP_NOWAIT);
555
556 /* the higher priority allocation failed, try the generic-blocking */
557 if (!job->gather_copy_mapped)
558 job->gather_copy_mapped = dma_alloc_wc(host, size,
559 &job->gather_copy,
560 GFP_KERNEL);
561 if (!job->gather_copy_mapped)
562 return -ENOMEM;
563
564 job->gather_copy_size = size;
565
566 for (i = 0; i < job->num_cmds; i++) {
567 struct host1x_job_gather *g;
568 void *gather;
569
570 if (job->cmds[i].is_wait)
571 continue;
572 g = &job->cmds[i].gather;
573
574 /* Copy the gather */
575 gather = host1x_bo_mmap(g->bo);
576 memcpy(job->gather_copy_mapped + offset, gather + g->offset,
577 g->words * sizeof(u32));
578 host1x_bo_munmap(g->bo, gather);
579
580 /* Store the location in the buffer */
581 g->base = job->gather_copy;
582 g->offset = offset;
583
584 /* Validate the job */
585 if (validate(&fw, g))
586 return -EINVAL;
587
588 offset += g->words * sizeof(u32);
589 }
590
591 /* No relocs should remain at this point */
592 if (fw.num_relocs)
593 return -EINVAL;
594
595 return 0;
596}
597
598int host1x_job_pin(struct host1x_job *job, struct device *dev)
599{
600 int err;
601 unsigned int i, j;
602 struct host1x *host = dev_get_drvdata(dev->parent);
603
604 /* pin memory */
605 err = pin_job(host, job);
606 if (err)
607 goto out;
608
609 if (job->enable_firewall) {
610 err = copy_gathers(host->dev, job, dev);
611 if (err)
612 goto out;
613 }
614
615 /* patch gathers */
616 for (i = 0; i < job->num_cmds; i++) {
617 struct host1x_job_gather *g;
618
619 if (job->cmds[i].is_wait)
620 continue;
621 g = &job->cmds[i].gather;
622
623 /* process each gather mem only once */
624 if (g->handled)
625 continue;
626
627 /* copy_gathers() sets gathers base if firewall is enabled */
628 if (!job->enable_firewall)
629 g->base = job->gather_addr_phys[i];
630
631 for (j = i + 1; j < job->num_cmds; j++) {
632 if (!job->cmds[j].is_wait &&
633 job->cmds[j].gather.bo == g->bo) {
634 job->cmds[j].gather.handled = true;
635 job->cmds[j].gather.base = g->base;
636 }
637 }
638
639 err = do_relocs(job, g);
640 if (err)
641 break;
642 }
643
644out:
645 if (err)
646 host1x_job_unpin(job);
647 wmb();
648
649 return err;
650}
651EXPORT_SYMBOL(host1x_job_pin);
652
653void host1x_job_unpin(struct host1x_job *job)
654{
655 struct host1x *host = dev_get_drvdata(job->channel->dev->parent);
656 unsigned int i;
657
658 for (i = 0; i < job->num_unpins; i++) {
659 struct host1x_bo_mapping *map = job->unpins[i].map;
660 struct host1x_bo *bo = map->bo;
661
662 if (!job->enable_firewall && map->size && host->domain) {
663 iommu_unmap(host->domain, job->addr_phys[i], map->size);
664 free_iova(&host->iova, iova_pfn(&host->iova, job->addr_phys[i]));
665 }
666
667 host1x_bo_unpin(map);
668 host1x_bo_put(bo);
669 }
670
671 job->num_unpins = 0;
672
673 if (job->gather_copy_size)
674 dma_free_wc(host->dev, job->gather_copy_size,
675 job->gather_copy_mapped, job->gather_copy);
676}
677EXPORT_SYMBOL(host1x_job_unpin);
678
679/*
680 * Debug routine used to dump job entries
681 */
682void host1x_job_dump(struct device *dev, struct host1x_job *job)
683{
684 dev_dbg(dev, " SYNCPT_ID %d\n", job->syncpt->id);
685 dev_dbg(dev, " SYNCPT_VAL %d\n", job->syncpt_end);
686 dev_dbg(dev, " FIRST_GET 0x%x\n", job->first_get);
687 dev_dbg(dev, " TIMEOUT %d\n", job->timeout);
688 dev_dbg(dev, " NUM_SLOTS %d\n", job->num_slots);
689 dev_dbg(dev, " NUM_HANDLES %d\n", job->num_unpins);
690}