job.c revision 3364cd28906d87f0c77754998679bb66639d4112
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/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 /* Check that we're not going to overflow */ 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 /* 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} 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 * 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 113 * by the host HW. 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 /* patch the wait */ 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 * 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). 134 */ 135static int do_waitchks(struct host1x_job *job, struct host1x *host, 136 struct host1x_bo *patch) 137{ 138 int i; 139 140 /* 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); 145 146 /* validate syncpt id */ 147 if (wait->syncpt_id > host1x_syncpt_nb_pts(host)) 148 continue; 149 150 /* skip all other gathers */ 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 /* 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; 235 u32 *target; 236 237 /* skip all other gathers */ 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 /* No relocs should remain at this point */ 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 /* 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); 485 486 /* Store the location in the buffer */ 487 g->base = job->gather_copy; 488 g->offset = offset; 489 490 /* Validate the job */ 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 /* get current syncpt values for waitchk */ 515 for_each_set_bit(i, waitchk_mask, host1x_syncpt_nb_pts(host)) 516 host1x_syncpt_load(host->syncpt + i); 517 518 /* pin memory */ 519 err = pin_job(job); 520 if (!err) 521 goto out; 522 523 /* patch gathers */ 524 for (i = 0; i < job->num_gathers; i++) { 525 struct host1x_job_gather *g = &job->gathers[i]; 526 527 /* process each gather mem only once */ 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 * Debug routine used to dump job entries 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