4 * Copyright (c) 2010-2013, NVIDIA Corporation.
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.
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
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/>.
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>
34 struct host1x_job *host1x_job_alloc(struct host1x_channel *ch,
35 u32 num_cmdbufs, u32 num_relocs,
38 struct host1x_job *job = NULL;
39 unsigned int num_unpins = num_cmdbufs + num_relocs;
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)
54 mem = job = kzalloc(total, GFP_KERNEL);
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;
73 job->reloc_addr_phys = job->addr_phys;
74 job->gather_addr_phys = &job->addr_phys[num_relocs];
79 struct host1x_job *host1x_job_get(struct host1x_job *job)
85 static void job_free(struct kref *ref)
87 struct host1x_job *job = container_of(ref, struct host1x_job, ref);
92 void host1x_job_put(struct host1x_job *job)
94 kref_put(&job->ref, job_free);
97 void host1x_job_add_gather(struct host1x_job *job, struct host1x_bo *bo,
98 u32 words, u32 offset)
100 struct host1x_job_gather *cur_gather = &job->gathers[job->num_gathers];
102 cur_gather->words = words;
104 cur_gather->offset = offset;
109 * NULL an already satisfied WAIT_SYNCPT host method, by patching its
110 * args in the command stream. The method data is changed to reference
111 * a reserved (never given out or incr) HOST1X_SYNCPT_RESERVED syncpt
112 * with a matching threshold value of 0, so is guaranteed to be popped
115 static void host1x_syncpt_patch_offset(struct host1x_syncpt *sp,
116 struct host1x_bo *h, u32 offset)
118 void *patch_addr = NULL;
121 patch_addr = host1x_bo_kmap(h, offset >> PAGE_SHIFT);
123 host1x_syncpt_patch_wait(sp,
124 patch_addr + (offset & ~PAGE_MASK));
125 host1x_bo_kunmap(h, offset >> PAGE_SHIFT, patch_addr);
127 pr_err("Could not map cmdbuf for wait check\n");
131 * Check driver supplied waitchk structs for syncpt thresholds
132 * that have already been satisfied and NULL the comparison (to
133 * avoid a wrap condition in the HW).
135 static int do_waitchks(struct host1x_job *job, struct host1x *host,
136 struct host1x_bo *patch)
140 /* compare syncpt vs wait threshold */
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);
146 /* validate syncpt id */
147 if (wait->syncpt_id > host1x_syncpt_nb_pts(host))
150 /* skip all other gathers */
151 if (patch != wait->bo)
154 trace_host1x_syncpt_wait_check(wait->bo, wait->offset,
155 wait->syncpt_id, wait->thresh,
156 host1x_syncpt_read_min(sp));
158 if (host1x_syncpt_is_expired(sp, wait->thresh)) {
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));
164 host1x_syncpt_patch_offset(sp, patch, wait->offset);
173 static unsigned int pin_job(struct host1x_job *job)
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;
184 reloc->target = host1x_bo_get(reloc->target);
188 phys_addr = host1x_bo_pin(reloc->target, &sgt);
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;
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;
203 g->bo = host1x_bo_get(g->bo);
207 phys_addr = host1x_bo_pin(g->bo, &sgt);
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;
217 return job->num_unpins;
220 host1x_job_unpin(job);
224 static unsigned int do_relocs(struct host1x_job *job, struct host1x_bo *cmdbuf)
228 void *cmdbuf_page_addr = NULL;
230 /* pin & patch the relocs for one gather */
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;
237 /* skip all other gathers */
238 if (cmdbuf != reloc->cmdbuf)
241 if (last_page != reloc->cmdbuf_offset >> PAGE_SHIFT) {
242 if (cmdbuf_page_addr)
243 host1x_bo_kunmap(cmdbuf, last_page,
246 cmdbuf_page_addr = host1x_bo_kmap(cmdbuf,
247 reloc->cmdbuf_offset >> PAGE_SHIFT);
248 last_page = reloc->cmdbuf_offset >> PAGE_SHIFT;
250 if (unlikely(!cmdbuf_page_addr)) {
251 pr_err("Could not map cmdbuf for relocation\n");
256 target = cmdbuf_page_addr + (reloc->cmdbuf_offset & ~PAGE_MASK);
257 *target = reloc_addr;
260 if (cmdbuf_page_addr)
261 host1x_bo_kunmap(cmdbuf, last_page, cmdbuf_page_addr);
266 static bool check_reloc(struct host1x_reloc *reloc, struct host1x_bo *cmdbuf,
269 offset *= sizeof(u32);
271 if (reloc->cmdbuf != cmdbuf || reloc->cmdbuf_offset != offset)
277 struct host1x_firewall {
278 struct host1x_job *job;
281 unsigned int num_relocs;
282 struct host1x_reloc *reloc;
284 struct host1x_bo *cmdbuf;
294 static int check_register(struct host1x_firewall *fw, unsigned long offset)
296 if (fw->job->is_addr_reg(fw->dev, fw->class, offset)) {
300 if (!check_reloc(fw->reloc, fw->cmdbuf, fw->offset))
310 static int check_mask(struct host1x_firewall *fw)
321 ret = check_register(fw, reg);
335 static int check_incr(struct host1x_firewall *fw)
337 u32 count = fw->count;
345 ret = check_register(fw, reg);
358 static int check_nonincr(struct host1x_firewall *fw)
360 u32 count = fw->count;
367 ret = check_register(fw, fw->reg);
379 static int validate(struct host1x_firewall *fw, struct host1x_job_gather *g)
381 u32 *cmdbuf_base = (u32 *)fw->job->gather_copy_mapped +
382 (g->offset / sizeof(u32));
385 if (!fw->job->is_addr_reg)
388 fw->words = g->words;
392 while (fw->words && !err) {
393 u32 word = cmdbuf_base[fw->offset];
394 u32 opcode = (word & 0xf0000000) >> 28;
404 fw->class = word >> 6 & 0x3ff;
405 fw->mask = word & 0x3f;
406 fw->reg = word >> 16 & 0xfff;
407 err = check_mask(fw);
412 fw->reg = word >> 16 & 0xfff;
413 fw->count = word & 0xffff;
414 err = check_incr(fw);
420 fw->reg = word >> 16 & 0xfff;
421 fw->count = word & 0xffff;
422 err = check_nonincr(fw);
428 fw->mask = word & 0xffff;
429 fw->reg = word >> 16 & 0xfff;
430 err = check_mask(fw);
448 static inline int copy_gathers(struct host1x_job *job, struct device *dev)
450 struct host1x_firewall fw;
457 fw.reloc = job->relocarray;
458 fw.num_relocs = job->num_relocs;
461 for (i = 0; i < job->num_gathers; i++) {
462 struct host1x_job_gather *g = &job->gathers[i];
463 size += g->words * sizeof(u32);
466 job->gather_copy_mapped = dma_alloc_writecombine(dev, size,
469 if (!job->gather_copy_mapped) {
470 job->gather_copy_mapped = NULL;
474 job->gather_copy_size = size;
476 for (i = 0; i < job->num_gathers; i++) {
477 struct host1x_job_gather *g = &job->gathers[i];
480 /* Copy the gather */
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);
486 /* Store the location in the buffer */
487 g->base = job->gather_copy;
490 /* Validate the job */
491 if (validate(&fw, g))
494 offset += g->words * sizeof(u32);
497 /* No relocs should remain at this point */
504 int host1x_job_pin(struct host1x_job *job, struct device *dev)
508 struct host1x *host = dev_get_drvdata(dev->parent);
509 DECLARE_BITMAP(waitchk_mask, host1x_syncpt_nb_pts(host));
511 bitmap_zero(waitchk_mask, host1x_syncpt_nb_pts(host));
512 for (i = 0; i < job->num_waitchk; i++) {
513 u32 syncpt_id = job->waitchk[i].syncpt_id;
514 if (syncpt_id < host1x_syncpt_nb_pts(host))
515 set_bit(syncpt_id, waitchk_mask);
518 /* get current syncpt values for waitchk */
519 for_each_set_bit(i, waitchk_mask, host1x_syncpt_nb_pts(host))
520 host1x_syncpt_load(host->syncpt + i);
528 for (i = 0; i < job->num_gathers; i++) {
529 struct host1x_job_gather *g = &job->gathers[i];
531 /* process each gather mem only once */
535 g->base = job->gather_addr_phys[i];
537 for (j = 0; j < job->num_gathers; j++)
538 if (job->gathers[j].bo == g->bo)
539 job->gathers[j].handled = true;
541 err = do_relocs(job, g->bo);
545 err = do_waitchks(job, host, g->bo);
550 if (IS_ENABLED(CONFIG_TEGRA_HOST1X_FIREWALL) && !err) {
551 err = copy_gathers(job, dev);
553 host1x_job_unpin(job);
564 void host1x_job_unpin(struct host1x_job *job)
568 for (i = 0; i < job->num_unpins; i++) {
569 struct host1x_job_unpin_data *unpin = &job->unpins[i];
570 host1x_bo_unpin(unpin->bo, unpin->sgt);
571 host1x_bo_put(unpin->bo);
575 if (job->gather_copy_size)
576 dma_free_writecombine(job->channel->dev, job->gather_copy_size,
577 job->gather_copy_mapped,
582 * Debug routine used to dump job entries
584 void host1x_job_dump(struct device *dev, struct host1x_job *job)
586 dev_dbg(dev, " SYNCPT_ID %d\n", job->syncpt_id);
587 dev_dbg(dev, " SYNCPT_VAL %d\n", job->syncpt_end);
588 dev_dbg(dev, " FIRST_GET 0x%x\n", job->first_get);
589 dev_dbg(dev, " TIMEOUT %d\n", job->timeout);
590 dev_dbg(dev, " NUM_SLOTS %d\n", job->num_slots);
591 dev_dbg(dev, " NUM_HANDLES %d\n", job->num_unpins);