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1/*
2 * Tegra host1x Job
3 *
4 * Copyright (c) 2010-2013, NVIDIA Corporation.
5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms and conditions of the GNU General Public License,
8 * version 2, as published by the Free Software Foundation.
9 *
10 * This program is distributed in the hope it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13 * more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program. If not, see <http://www.gnu.org/licenses/>.
17 */
18
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 /* Check that we're not going to overflow */
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 /* Redistribute memory to the structs */
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 * NULL an already satisfied WAIT_SYNCPT host method, by patching its
114 * args in the command stream. The method data is changed to reference
115 * a reserved (never given out or incr) HOST1X_SYNCPT_RESERVED syncpt
116 * with a matching threshold value of 0, so is guaranteed to be popped
117 * by the host HW.
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 /* patch the wait */
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 * Check driver supplied waitchk structs for syncpt thresholds
136 * that have already been satisfied and NULL the comparison (to
137 * avoid a wrap condition in the HW).
138 */
139static int do_waitchks(struct host1x_job *job, struct host1x *host,
140 struct host1x_bo *patch)
141{
142 int i;
143
144 /* compare syncpt vs wait threshold */
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 /* validate syncpt id */
151 if (wait->syncpt_id > host1x_syncpt_nb_pts(host))
152 continue;
153
154 /* skip all other gathers */
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 %d (%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_job *job)
178{
179 unsigned int i;
180
181 job->num_unpins = 0;
182
183 for (i = 0; i < job->num_relocs; i++) {
184 struct host1x_reloc *reloc = &job->relocarray[i];
185 struct sg_table *sgt;
186 dma_addr_t phys_addr;
187
188 reloc->target.bo = host1x_bo_get(reloc->target.bo);
189 if (!reloc->target.bo)
190 goto unpin;
191
192 phys_addr = host1x_bo_pin(reloc->target.bo, &sgt);
193 if (!phys_addr)
194 goto unpin;
195
196 job->addr_phys[job->num_unpins] = phys_addr;
197 job->unpins[job->num_unpins].bo = reloc->target.bo;
198 job->unpins[job->num_unpins].sgt = sgt;
199 job->num_unpins++;
200 }
201
202 for (i = 0; i < job->num_gathers; i++) {
203 struct host1x_job_gather *g = &job->gathers[i];
204 struct sg_table *sgt;
205 dma_addr_t phys_addr;
206
207 g->bo = host1x_bo_get(g->bo);
208 if (!g->bo)
209 goto unpin;
210
211 phys_addr = host1x_bo_pin(g->bo, &sgt);
212 if (!phys_addr)
213 goto unpin;
214
215 job->addr_phys[job->num_unpins] = phys_addr;
216 job->unpins[job->num_unpins].bo = g->bo;
217 job->unpins[job->num_unpins].sgt = sgt;
218 job->num_unpins++;
219 }
220
221 return job->num_unpins;
222
223unpin:
224 host1x_job_unpin(job);
225 return 0;
226}
227
228static int do_relocs(struct host1x_job *job, struct host1x_bo *cmdbuf)
229{
230 int i = 0;
231 u32 last_page = ~0;
232 void *cmdbuf_page_addr = NULL;
233
234 /* pin & patch the relocs for one gather */
235 for (i = 0; i < job->num_relocs; i++) {
236 struct host1x_reloc *reloc = &job->relocarray[i];
237 u32 reloc_addr = (job->reloc_addr_phys[i] +
238 reloc->target.offset) >> reloc->shift;
239 u32 *target;
240
241 /* skip all other gathers */
242 if (cmdbuf != reloc->cmdbuf.bo)
243 continue;
244
245 if (last_page != reloc->cmdbuf.offset >> PAGE_SHIFT) {
246 if (cmdbuf_page_addr)
247 host1x_bo_kunmap(cmdbuf, last_page,
248 cmdbuf_page_addr);
249
250 cmdbuf_page_addr = host1x_bo_kmap(cmdbuf,
251 reloc->cmdbuf.offset >> PAGE_SHIFT);
252 last_page = reloc->cmdbuf.offset >> PAGE_SHIFT;
253
254 if (unlikely(!cmdbuf_page_addr)) {
255 pr_err("Could not map cmdbuf for relocation\n");
256 return -ENOMEM;
257 }
258 }
259
260 target = cmdbuf_page_addr + (reloc->cmdbuf.offset & ~PAGE_MASK);
261 *target = reloc_addr;
262 }
263
264 if (cmdbuf_page_addr)
265 host1x_bo_kunmap(cmdbuf, last_page, cmdbuf_page_addr);
266
267 return 0;
268}
269
270static bool check_reloc(struct host1x_reloc *reloc, struct host1x_bo *cmdbuf,
271 unsigned int offset)
272{
273 offset *= sizeof(u32);
274
275 if (reloc->cmdbuf.bo != cmdbuf || reloc->cmdbuf.offset != offset)
276 return false;
277
278 return true;
279}
280
281struct host1x_firewall {
282 struct host1x_job *job;
283 struct device *dev;
284
285 unsigned int num_relocs;
286 struct host1x_reloc *reloc;
287
288 struct host1x_bo *cmdbuf;
289 unsigned int offset;
290
291 u32 words;
292 u32 class;
293 u32 reg;
294 u32 mask;
295 u32 count;
296};
297
298static int check_register(struct host1x_firewall *fw, unsigned long offset)
299{
300 if (fw->job->is_addr_reg(fw->dev, fw->class, offset)) {
301 if (!fw->num_relocs)
302 return -EINVAL;
303
304 if (!check_reloc(fw->reloc, fw->cmdbuf, fw->offset))
305 return -EINVAL;
306
307 fw->num_relocs--;
308 fw->reloc++;
309 }
310
311 return 0;
312}
313
314static int check_mask(struct host1x_firewall *fw)
315{
316 u32 mask = fw->mask;
317 u32 reg = fw->reg;
318 int ret;
319
320 while (mask) {
321 if (fw->words == 0)
322 return -EINVAL;
323
324 if (mask & 1) {
325 ret = check_register(fw, reg);
326 if (ret < 0)
327 return ret;
328
329 fw->words--;
330 fw->offset++;
331 }
332 mask >>= 1;
333 reg++;
334 }
335
336 return 0;
337}
338
339static int check_incr(struct host1x_firewall *fw)
340{
341 u32 count = fw->count;
342 u32 reg = fw->reg;
343 int ret;
344
345 while (count) {
346 if (fw->words == 0)
347 return -EINVAL;
348
349 ret = check_register(fw, reg);
350 if (ret < 0)
351 return ret;
352
353 reg++;
354 fw->words--;
355 fw->offset++;
356 count--;
357 }
358
359 return 0;
360}
361
362static int check_nonincr(struct host1x_firewall *fw)
363{
364 u32 count = fw->count;
365 int ret;
366
367 while (count) {
368 if (fw->words == 0)
369 return -EINVAL;
370
371 ret = check_register(fw, fw->reg);
372 if (ret < 0)
373 return ret;
374
375 fw->words--;
376 fw->offset++;
377 count--;
378 }
379
380 return 0;
381}
382
383static int validate(struct host1x_firewall *fw, struct host1x_job_gather *g)
384{
385 u32 *cmdbuf_base = (u32 *)fw->job->gather_copy_mapped +
386 (g->offset / sizeof(u32));
387 int err = 0;
388
389 if (!fw->job->is_addr_reg)
390 return 0;
391
392 fw->words = g->words;
393 fw->cmdbuf = g->bo;
394 fw->offset = 0;
395
396 while (fw->words && !err) {
397 u32 word = cmdbuf_base[fw->offset];
398 u32 opcode = (word & 0xf0000000) >> 28;
399
400 fw->mask = 0;
401 fw->reg = 0;
402 fw->count = 0;
403 fw->words--;
404 fw->offset++;
405
406 switch (opcode) {
407 case 0:
408 fw->class = word >> 6 & 0x3ff;
409 fw->mask = word & 0x3f;
410 fw->reg = word >> 16 & 0xfff;
411 err = check_mask(fw);
412 if (err)
413 goto out;
414 break;
415 case 1:
416 fw->reg = word >> 16 & 0xfff;
417 fw->count = word & 0xffff;
418 err = check_incr(fw);
419 if (err)
420 goto out;
421 break;
422
423 case 2:
424 fw->reg = word >> 16 & 0xfff;
425 fw->count = word & 0xffff;
426 err = check_nonincr(fw);
427 if (err)
428 goto out;
429 break;
430
431 case 3:
432 fw->mask = word & 0xffff;
433 fw->reg = word >> 16 & 0xfff;
434 err = check_mask(fw);
435 if (err)
436 goto out;
437 break;
438 case 4:
439 case 5:
440 case 14:
441 break;
442 default:
443 err = -EINVAL;
444 break;
445 }
446 }
447
448out:
449 return err;
450}
451
452static inline int copy_gathers(struct host1x_job *job, struct device *dev)
453{
454 struct host1x_firewall fw;
455 size_t size = 0;
456 size_t offset = 0;
457 int i;
458
459 fw.job = job;
460 fw.dev = dev;
461 fw.reloc = job->relocarray;
462 fw.num_relocs = job->num_relocs;
463 fw.class = 0;
464
465 for (i = 0; i < job->num_gathers; i++) {
466 struct host1x_job_gather *g = &job->gathers[i];
467 size += g->words * sizeof(u32);
468 }
469
470 job->gather_copy_mapped = dma_alloc_wc(dev, size, &job->gather_copy,
471 GFP_KERNEL);
472 if (!job->gather_copy_mapped) {
473 job->gather_copy_mapped = NULL;
474 return -ENOMEM;
475 }
476
477 job->gather_copy_size = size;
478
479 for (i = 0; i < job->num_gathers; i++) {
480 struct host1x_job_gather *g = &job->gathers[i];
481 void *gather;
482
483 /* Copy the gather */
484 gather = host1x_bo_mmap(g->bo);
485 memcpy(job->gather_copy_mapped + offset, gather + g->offset,
486 g->words * sizeof(u32));
487 host1x_bo_munmap(g->bo, gather);
488
489 /* Store the location in the buffer */
490 g->base = job->gather_copy;
491 g->offset = offset;
492
493 /* Validate the job */
494 if (validate(&fw, g))
495 return -EINVAL;
496
497 offset += g->words * sizeof(u32);
498 }
499
500 /* No relocs should remain at this point */
501 if (fw.num_relocs)
502 return -EINVAL;
503
504 return 0;
505}
506
507int host1x_job_pin(struct host1x_job *job, struct device *dev)
508{
509 int err;
510 unsigned int i, j;
511 struct host1x *host = dev_get_drvdata(dev->parent);
512 DECLARE_BITMAP(waitchk_mask, host1x_syncpt_nb_pts(host));
513
514 bitmap_zero(waitchk_mask, host1x_syncpt_nb_pts(host));
515 for (i = 0; i < job->num_waitchk; i++) {
516 u32 syncpt_id = job->waitchk[i].syncpt_id;
517 if (syncpt_id < host1x_syncpt_nb_pts(host))
518 set_bit(syncpt_id, waitchk_mask);
519 }
520
521 /* get current syncpt values for waitchk */
522 for_each_set_bit(i, waitchk_mask, host1x_syncpt_nb_pts(host))
523 host1x_syncpt_load(host->syncpt + i);
524
525 /* pin memory */
526 err = pin_job(job);
527 if (!err)
528 goto out;
529
530 /* patch gathers */
531 for (i = 0; i < job->num_gathers; i++) {
532 struct host1x_job_gather *g = &job->gathers[i];
533
534 /* process each gather mem only once */
535 if (g->handled)
536 continue;
537
538 g->base = job->gather_addr_phys[i];
539
540 for (j = i + 1; j < job->num_gathers; j++)
541 if (job->gathers[j].bo == g->bo)
542 job->gathers[j].handled = true;
543
544 err = do_relocs(job, g->bo);
545 if (err)
546 break;
547
548 err = do_waitchks(job, host, g->bo);
549 if (err)
550 break;
551 }
552
553 if (IS_ENABLED(CONFIG_TEGRA_HOST1X_FIREWALL) && !err) {
554 err = copy_gathers(job, dev);
555 if (err) {
556 host1x_job_unpin(job);
557 return err;
558 }
559 }
560
561out:
562 wmb();
563
564 return err;
565}
566EXPORT_SYMBOL(host1x_job_pin);
567
568void host1x_job_unpin(struct host1x_job *job)
569{
570 unsigned int i;
571
572 for (i = 0; i < job->num_unpins; i++) {
573 struct host1x_job_unpin_data *unpin = &job->unpins[i];
574 host1x_bo_unpin(unpin->bo, unpin->sgt);
575 host1x_bo_put(unpin->bo);
576 }
577 job->num_unpins = 0;
578
579 if (job->gather_copy_size)
580 dma_free_wc(job->channel->dev, job->gather_copy_size,
581 job->gather_copy_mapped, job->gather_copy);
582}
583EXPORT_SYMBOL(host1x_job_unpin);
584
585/*
586 * Debug routine used to dump job entries
587 */
588void host1x_job_dump(struct device *dev, struct host1x_job *job)
589{
590 dev_dbg(dev, " SYNCPT_ID %d\n", job->syncpt_id);
591 dev_dbg(dev, " SYNCPT_VAL %d\n", job->syncpt_end);
592 dev_dbg(dev, " FIRST_GET 0x%x\n", job->first_get);
593 dev_dbg(dev, " TIMEOUT %d\n", job->timeout);
594 dev_dbg(dev, " NUM_SLOTS %d\n", job->num_slots);
595 dev_dbg(dev, " NUM_HANDLES %d\n", job->num_unpins);
596}
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}