1 /* $NetBSD: i915_vma.c,v 1.2 2021/12/18 23:45:31 riastradh Exp $ */ 2 3 /* 4 * Copyright 2016 Intel Corporation 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a 7 * copy of this software and associated documentation files (the "Software"), 8 * to deal in the Software without restriction, including without limitation 9 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 10 * and/or sell copies of the Software, and to permit persons to whom the 11 * Software is furnished to do so, subject to the following conditions: 12 * 13 * The above copyright notice and this permission notice (including the next 14 * paragraph) shall be included in all copies or substantial portions of the 15 * Software. 16 * 17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 20 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 22 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS 23 * IN THE SOFTWARE. 24 * 25 */ 26 27 #include <sys/cdefs.h> 28 __KERNEL_RCSID(0, "$NetBSD: i915_vma.c,v 1.2 2021/12/18 23:45:31 riastradh Exp $"); 29 30 #include <linux/prime_numbers.h> 31 32 #include "gem/i915_gem_context.h" 33 #include "gem/selftests/mock_context.h" 34 35 #include "i915_scatterlist.h" 36 #include "i915_selftest.h" 37 38 #include "mock_gem_device.h" 39 #include "mock_gtt.h" 40 41 static bool assert_vma(struct i915_vma *vma, 42 struct drm_i915_gem_object *obj, 43 struct i915_gem_context *ctx) 44 { 45 bool ok = true; 46 47 if (vma->vm != rcu_access_pointer(ctx->vm)) { 48 pr_err("VMA created with wrong VM\n"); 49 ok = false; 50 } 51 52 if (vma->size != obj->base.size) { 53 pr_err("VMA created with wrong size, found %llu, expected %zu\n", 54 vma->size, obj->base.size); 55 ok = false; 56 } 57 58 if (vma->ggtt_view.type != I915_GGTT_VIEW_NORMAL) { 59 pr_err("VMA created with wrong type [%d]\n", 60 vma->ggtt_view.type); 61 ok = false; 62 } 63 64 return ok; 65 } 66 67 static struct i915_vma * 68 checked_vma_instance(struct drm_i915_gem_object *obj, 69 struct i915_address_space *vm, 70 const struct i915_ggtt_view *view) 71 { 72 struct i915_vma *vma; 73 bool ok = true; 74 75 vma = i915_vma_instance(obj, vm, view); 76 if (IS_ERR(vma)) 77 return vma; 78 79 /* Manual checks, will be reinforced by i915_vma_compare! */ 80 if (vma->vm != vm) { 81 pr_err("VMA's vm [%p] does not match request [%p]\n", 82 vma->vm, vm); 83 ok = false; 84 } 85 86 if (i915_is_ggtt(vm) != i915_vma_is_ggtt(vma)) { 87 pr_err("VMA ggtt status [%d] does not match parent [%d]\n", 88 i915_vma_is_ggtt(vma), i915_is_ggtt(vm)); 89 ok = false; 90 } 91 92 if (i915_vma_compare(vma, vm, view)) { 93 pr_err("i915_vma_compare failed with create parameters!\n"); 94 return ERR_PTR(-EINVAL); 95 } 96 97 if (i915_vma_compare(vma, vma->vm, 98 i915_vma_is_ggtt(vma) ? &vma->ggtt_view : NULL)) { 99 pr_err("i915_vma_compare failed with itself\n"); 100 return ERR_PTR(-EINVAL); 101 } 102 103 if (!ok) { 104 pr_err("i915_vma_compare failed to detect the difference!\n"); 105 return ERR_PTR(-EINVAL); 106 } 107 108 return vma; 109 } 110 111 static int create_vmas(struct drm_i915_private *i915, 112 struct list_head *objects, 113 struct list_head *contexts) 114 { 115 struct drm_i915_gem_object *obj; 116 struct i915_gem_context *ctx; 117 int pinned; 118 119 list_for_each_entry(obj, objects, st_link) { 120 for (pinned = 0; pinned <= 1; pinned++) { 121 list_for_each_entry(ctx, contexts, link) { 122 struct i915_address_space *vm; 123 struct i915_vma *vma; 124 int err; 125 126 vm = i915_gem_context_get_vm_rcu(ctx); 127 vma = checked_vma_instance(obj, vm, NULL); 128 i915_vm_put(vm); 129 if (IS_ERR(vma)) 130 return PTR_ERR(vma); 131 132 if (!assert_vma(vma, obj, ctx)) { 133 pr_err("VMA lookup/create failed\n"); 134 return -EINVAL; 135 } 136 137 if (!pinned) { 138 err = i915_vma_pin(vma, 0, 0, PIN_USER); 139 if (err) { 140 pr_err("Failed to pin VMA\n"); 141 return err; 142 } 143 } else { 144 i915_vma_unpin(vma); 145 } 146 } 147 } 148 } 149 150 return 0; 151 } 152 153 static int igt_vma_create(void *arg) 154 { 155 struct i915_ggtt *ggtt = arg; 156 struct drm_i915_private *i915 = ggtt->vm.i915; 157 struct drm_i915_gem_object *obj, *on; 158 struct i915_gem_context *ctx, *cn; 159 unsigned long num_obj, num_ctx; 160 unsigned long no, nc; 161 IGT_TIMEOUT(end_time); 162 LIST_HEAD(contexts); 163 LIST_HEAD(objects); 164 int err = -ENOMEM; 165 166 /* Exercise creating many vma amonst many objections, checking the 167 * vma creation and lookup routines. 168 */ 169 170 no = 0; 171 for_each_prime_number(num_obj, ULONG_MAX - 1) { 172 for (; no < num_obj; no++) { 173 obj = i915_gem_object_create_internal(i915, PAGE_SIZE); 174 if (IS_ERR(obj)) 175 goto out; 176 177 list_add(&obj->st_link, &objects); 178 } 179 180 nc = 0; 181 for_each_prime_number(num_ctx, 2 * NUM_CONTEXT_TAG) { 182 for (; nc < num_ctx; nc++) { 183 ctx = mock_context(i915, "mock"); 184 if (!ctx) 185 goto out; 186 187 list_move(&ctx->link, &contexts); 188 } 189 190 err = create_vmas(i915, &objects, &contexts); 191 if (err) 192 goto out; 193 194 if (igt_timeout(end_time, 195 "%s timed out: after %lu objects in %lu contexts\n", 196 __func__, no, nc)) 197 goto end; 198 } 199 200 list_for_each_entry_safe(ctx, cn, &contexts, link) { 201 list_del_init(&ctx->link); 202 mock_context_close(ctx); 203 } 204 205 cond_resched(); 206 } 207 208 end: 209 /* Final pass to lookup all created contexts */ 210 err = create_vmas(i915, &objects, &contexts); 211 out: 212 list_for_each_entry_safe(ctx, cn, &contexts, link) { 213 list_del_init(&ctx->link); 214 mock_context_close(ctx); 215 } 216 217 list_for_each_entry_safe(obj, on, &objects, st_link) 218 i915_gem_object_put(obj); 219 return err; 220 } 221 222 struct pin_mode { 223 u64 size; 224 u64 flags; 225 bool (*assert)(const struct i915_vma *, 226 const struct pin_mode *mode, 227 int result); 228 const char *string; 229 }; 230 231 static bool assert_pin_valid(const struct i915_vma *vma, 232 const struct pin_mode *mode, 233 int result) 234 { 235 if (result) 236 return false; 237 238 if (i915_vma_misplaced(vma, mode->size, 0, mode->flags)) 239 return false; 240 241 return true; 242 } 243 244 __maybe_unused 245 static bool assert_pin_enospc(const struct i915_vma *vma, 246 const struct pin_mode *mode, 247 int result) 248 { 249 return result == -ENOSPC; 250 } 251 252 __maybe_unused 253 static bool assert_pin_einval(const struct i915_vma *vma, 254 const struct pin_mode *mode, 255 int result) 256 { 257 return result == -EINVAL; 258 } 259 260 static int igt_vma_pin1(void *arg) 261 { 262 struct i915_ggtt *ggtt = arg; 263 const struct pin_mode modes[] = { 264 #define VALID(sz, fl) { .size = (sz), .flags = (fl), .assert = assert_pin_valid, .string = #sz ", " #fl ", (valid) " } 265 #define __INVALID(sz, fl, check, eval) { .size = (sz), .flags = (fl), .assert = (check), .string = #sz ", " #fl ", (invalid " #eval ")" } 266 #define INVALID(sz, fl) __INVALID(sz, fl, assert_pin_einval, EINVAL) 267 #define NOSPACE(sz, fl) __INVALID(sz, fl, assert_pin_enospc, ENOSPC) 268 VALID(0, PIN_GLOBAL), 269 VALID(0, PIN_GLOBAL | PIN_MAPPABLE), 270 271 VALID(0, PIN_GLOBAL | PIN_OFFSET_BIAS | 4096), 272 VALID(0, PIN_GLOBAL | PIN_OFFSET_BIAS | 8192), 273 VALID(0, PIN_GLOBAL | PIN_OFFSET_BIAS | (ggtt->mappable_end - 4096)), 274 VALID(0, PIN_GLOBAL | PIN_MAPPABLE | PIN_OFFSET_BIAS | (ggtt->mappable_end - 4096)), 275 VALID(0, PIN_GLOBAL | PIN_OFFSET_BIAS | (ggtt->vm.total - 4096)), 276 277 VALID(0, PIN_GLOBAL | PIN_MAPPABLE | PIN_OFFSET_FIXED | (ggtt->mappable_end - 4096)), 278 INVALID(0, PIN_GLOBAL | PIN_MAPPABLE | PIN_OFFSET_FIXED | ggtt->mappable_end), 279 VALID(0, PIN_GLOBAL | PIN_OFFSET_FIXED | (ggtt->vm.total - 4096)), 280 INVALID(0, PIN_GLOBAL | PIN_OFFSET_FIXED | ggtt->vm.total), 281 INVALID(0, PIN_GLOBAL | PIN_OFFSET_FIXED | round_down(U64_MAX, PAGE_SIZE)), 282 283 VALID(4096, PIN_GLOBAL), 284 VALID(8192, PIN_GLOBAL), 285 VALID(ggtt->mappable_end - 4096, PIN_GLOBAL | PIN_MAPPABLE), 286 VALID(ggtt->mappable_end, PIN_GLOBAL | PIN_MAPPABLE), 287 NOSPACE(ggtt->mappable_end + 4096, PIN_GLOBAL | PIN_MAPPABLE), 288 VALID(ggtt->vm.total - 4096, PIN_GLOBAL), 289 VALID(ggtt->vm.total, PIN_GLOBAL), 290 NOSPACE(ggtt->vm.total + 4096, PIN_GLOBAL), 291 NOSPACE(round_down(U64_MAX, PAGE_SIZE), PIN_GLOBAL), 292 INVALID(8192, PIN_GLOBAL | PIN_MAPPABLE | PIN_OFFSET_FIXED | (ggtt->mappable_end - 4096)), 293 INVALID(8192, PIN_GLOBAL | PIN_OFFSET_FIXED | (ggtt->vm.total - 4096)), 294 INVALID(8192, PIN_GLOBAL | PIN_OFFSET_FIXED | (round_down(U64_MAX, PAGE_SIZE) - 4096)), 295 296 VALID(8192, PIN_GLOBAL | PIN_OFFSET_BIAS | (ggtt->mappable_end - 4096)), 297 298 #if !IS_ENABLED(CONFIG_DRM_I915_DEBUG_GEM) 299 /* Misusing BIAS is a programming error (it is not controllable 300 * from userspace) so when debugging is enabled, it explodes. 301 * However, the tests are still quite interesting for checking 302 * variable start, end and size. 303 */ 304 NOSPACE(0, PIN_GLOBAL | PIN_MAPPABLE | PIN_OFFSET_BIAS | ggtt->mappable_end), 305 NOSPACE(0, PIN_GLOBAL | PIN_OFFSET_BIAS | ggtt->vm.total), 306 NOSPACE(8192, PIN_GLOBAL | PIN_MAPPABLE | PIN_OFFSET_BIAS | (ggtt->mappable_end - 4096)), 307 NOSPACE(8192, PIN_GLOBAL | PIN_OFFSET_BIAS | (ggtt->vm.total - 4096)), 308 #endif 309 { }, 310 #undef NOSPACE 311 #undef INVALID 312 #undef __INVALID 313 #undef VALID 314 }, *m; 315 struct drm_i915_gem_object *obj; 316 struct i915_vma *vma; 317 int err = -EINVAL; 318 319 /* Exercise all the weird and wonderful i915_vma_pin requests, 320 * focusing on error handling of boundary conditions. 321 */ 322 323 GEM_BUG_ON(!drm_mm_clean(&ggtt->vm.mm)); 324 325 obj = i915_gem_object_create_internal(ggtt->vm.i915, PAGE_SIZE); 326 if (IS_ERR(obj)) 327 return PTR_ERR(obj); 328 329 vma = checked_vma_instance(obj, &ggtt->vm, NULL); 330 if (IS_ERR(vma)) 331 goto out; 332 333 for (m = modes; m->assert; m++) { 334 err = i915_vma_pin(vma, m->size, 0, m->flags); 335 if (!m->assert(vma, m, err)) { 336 pr_err("%s to pin single page into GGTT with mode[%d:%s]: size=%llx flags=%llx, err=%d\n", 337 m->assert == assert_pin_valid ? "Failed" : "Unexpectedly succeeded", 338 (int)(m - modes), m->string, m->size, m->flags, 339 err); 340 if (!err) 341 i915_vma_unpin(vma); 342 err = -EINVAL; 343 goto out; 344 } 345 346 if (!err) { 347 i915_vma_unpin(vma); 348 err = i915_vma_unbind(vma); 349 if (err) { 350 pr_err("Failed to unbind single page from GGTT, err=%d\n", err); 351 goto out; 352 } 353 } 354 355 cond_resched(); 356 } 357 358 err = 0; 359 out: 360 i915_gem_object_put(obj); 361 return err; 362 } 363 364 static unsigned long rotated_index(const struct intel_rotation_info *r, 365 unsigned int n, 366 unsigned int x, 367 unsigned int y) 368 { 369 return (r->plane[n].stride * (r->plane[n].height - y - 1) + 370 r->plane[n].offset + x); 371 } 372 373 static struct scatterlist * 374 assert_rotated(struct drm_i915_gem_object *obj, 375 const struct intel_rotation_info *r, unsigned int n, 376 struct scatterlist *sg) 377 { 378 unsigned int x, y; 379 380 for (x = 0; x < r->plane[n].width; x++) { 381 for (y = 0; y < r->plane[n].height; y++) { 382 unsigned long src_idx; 383 dma_addr_t src; 384 385 if (!sg) { 386 pr_err("Invalid sg table: too short at plane %d, (%d, %d)!\n", 387 n, x, y); 388 return ERR_PTR(-EINVAL); 389 } 390 391 src_idx = rotated_index(r, n, x, y); 392 src = i915_gem_object_get_dma_address(obj, src_idx); 393 394 if (sg_dma_len(sg) != PAGE_SIZE) { 395 pr_err("Invalid sg.length, found %d, expected %lu for rotated page (%d, %d) [src index %lu]\n", 396 sg_dma_len(sg), PAGE_SIZE, 397 x, y, src_idx); 398 return ERR_PTR(-EINVAL); 399 } 400 401 if (sg_dma_address(sg) != src) { 402 pr_err("Invalid address for rotated page (%d, %d) [src index %lu]\n", 403 x, y, src_idx); 404 return ERR_PTR(-EINVAL); 405 } 406 407 sg = sg_next(sg); 408 } 409 } 410 411 return sg; 412 } 413 414 static unsigned long remapped_index(const struct intel_remapped_info *r, 415 unsigned int n, 416 unsigned int x, 417 unsigned int y) 418 { 419 return (r->plane[n].stride * y + 420 r->plane[n].offset + x); 421 } 422 423 static struct scatterlist * 424 assert_remapped(struct drm_i915_gem_object *obj, 425 const struct intel_remapped_info *r, unsigned int n, 426 struct scatterlist *sg) 427 { 428 unsigned int x, y; 429 unsigned int left = 0; 430 unsigned int offset; 431 432 for (y = 0; y < r->plane[n].height; y++) { 433 for (x = 0; x < r->plane[n].width; x++) { 434 unsigned long src_idx; 435 dma_addr_t src; 436 437 if (!sg) { 438 pr_err("Invalid sg table: too short at plane %d, (%d, %d)!\n", 439 n, x, y); 440 return ERR_PTR(-EINVAL); 441 } 442 if (!left) { 443 offset = 0; 444 left = sg_dma_len(sg); 445 } 446 447 src_idx = remapped_index(r, n, x, y); 448 src = i915_gem_object_get_dma_address(obj, src_idx); 449 450 if (left < PAGE_SIZE || left & (PAGE_SIZE-1)) { 451 pr_err("Invalid sg.length, found %d, expected %lu for remapped page (%d, %d) [src index %lu]\n", 452 sg_dma_len(sg), PAGE_SIZE, 453 x, y, src_idx); 454 return ERR_PTR(-EINVAL); 455 } 456 457 if (sg_dma_address(sg) + offset != src) { 458 pr_err("Invalid address for remapped page (%d, %d) [src index %lu]\n", 459 x, y, src_idx); 460 return ERR_PTR(-EINVAL); 461 } 462 463 left -= PAGE_SIZE; 464 offset += PAGE_SIZE; 465 466 467 if (!left) 468 sg = sg_next(sg); 469 } 470 } 471 472 return sg; 473 } 474 475 static unsigned int rotated_size(const struct intel_remapped_plane_info *a, 476 const struct intel_remapped_plane_info *b) 477 { 478 return a->width * a->height + b->width * b->height; 479 } 480 481 static int igt_vma_rotate_remap(void *arg) 482 { 483 struct i915_ggtt *ggtt = arg; 484 struct i915_address_space *vm = &ggtt->vm; 485 struct drm_i915_gem_object *obj; 486 const struct intel_remapped_plane_info planes[] = { 487 { .width = 1, .height = 1, .stride = 1 }, 488 { .width = 2, .height = 2, .stride = 2 }, 489 { .width = 4, .height = 4, .stride = 4 }, 490 { .width = 8, .height = 8, .stride = 8 }, 491 492 { .width = 3, .height = 5, .stride = 3 }, 493 { .width = 3, .height = 5, .stride = 4 }, 494 { .width = 3, .height = 5, .stride = 5 }, 495 496 { .width = 5, .height = 3, .stride = 5 }, 497 { .width = 5, .height = 3, .stride = 7 }, 498 { .width = 5, .height = 3, .stride = 9 }, 499 500 { .width = 4, .height = 6, .stride = 6 }, 501 { .width = 6, .height = 4, .stride = 6 }, 502 { } 503 }, *a, *b; 504 enum i915_ggtt_view_type types[] = { 505 I915_GGTT_VIEW_ROTATED, 506 I915_GGTT_VIEW_REMAPPED, 507 0, 508 }, *t; 509 const unsigned int max_pages = 64; 510 int err = -ENOMEM; 511 512 /* Create VMA for many different combinations of planes and check 513 * that the page layout within the rotated VMA match our expectations. 514 */ 515 516 obj = i915_gem_object_create_internal(vm->i915, max_pages * PAGE_SIZE); 517 if (IS_ERR(obj)) 518 goto out; 519 520 for (t = types; *t; t++) { 521 for (a = planes; a->width; a++) { 522 for (b = planes + ARRAY_SIZE(planes); b-- != planes; ) { 523 struct i915_ggtt_view view; 524 unsigned int n, max_offset; 525 526 max_offset = max(a->stride * a->height, 527 b->stride * b->height); 528 GEM_BUG_ON(max_offset > max_pages); 529 max_offset = max_pages - max_offset; 530 531 view.type = *t; 532 view.rotated.plane[0] = *a; 533 view.rotated.plane[1] = *b; 534 535 for_each_prime_number_from(view.rotated.plane[0].offset, 0, max_offset) { 536 for_each_prime_number_from(view.rotated.plane[1].offset, 0, max_offset) { 537 struct scatterlist *sg; 538 struct i915_vma *vma; 539 540 vma = checked_vma_instance(obj, vm, &view); 541 if (IS_ERR(vma)) { 542 err = PTR_ERR(vma); 543 goto out_object; 544 } 545 546 err = i915_vma_pin(vma, 0, 0, PIN_GLOBAL); 547 if (err) { 548 pr_err("Failed to pin VMA, err=%d\n", err); 549 goto out_object; 550 } 551 552 if (view.type == I915_GGTT_VIEW_ROTATED && 553 vma->size != rotated_size(a, b) * PAGE_SIZE) { 554 pr_err("VMA is wrong size, expected %lu, found %llu\n", 555 PAGE_SIZE * rotated_size(a, b), vma->size); 556 err = -EINVAL; 557 goto out_object; 558 } 559 560 if (view.type == I915_GGTT_VIEW_REMAPPED && 561 vma->size > rotated_size(a, b) * PAGE_SIZE) { 562 pr_err("VMA is wrong size, expected %lu, found %llu\n", 563 PAGE_SIZE * rotated_size(a, b), vma->size); 564 err = -EINVAL; 565 goto out_object; 566 } 567 568 if (vma->pages->nents > rotated_size(a, b)) { 569 pr_err("sg table is wrong sizeo, expected %u, found %u nents\n", 570 rotated_size(a, b), vma->pages->nents); 571 err = -EINVAL; 572 goto out_object; 573 } 574 575 if (vma->node.size < vma->size) { 576 pr_err("VMA binding too small, expected %llu, found %llu\n", 577 vma->size, vma->node.size); 578 err = -EINVAL; 579 goto out_object; 580 } 581 582 if (vma->pages == obj->mm.pages) { 583 pr_err("VMA using unrotated object pages!\n"); 584 err = -EINVAL; 585 goto out_object; 586 } 587 588 sg = vma->pages->sgl; 589 for (n = 0; n < ARRAY_SIZE(view.rotated.plane); n++) { 590 if (view.type == I915_GGTT_VIEW_ROTATED) 591 sg = assert_rotated(obj, &view.rotated, n, sg); 592 else 593 sg = assert_remapped(obj, &view.remapped, n, sg); 594 if (IS_ERR(sg)) { 595 pr_err("Inconsistent %s VMA pages for plane %d: [(%d, %d, %d, %d), (%d, %d, %d, %d)]\n", 596 view.type == I915_GGTT_VIEW_ROTATED ? 597 "rotated" : "remapped", n, 598 view.rotated.plane[0].width, 599 view.rotated.plane[0].height, 600 view.rotated.plane[0].stride, 601 view.rotated.plane[0].offset, 602 view.rotated.plane[1].width, 603 view.rotated.plane[1].height, 604 view.rotated.plane[1].stride, 605 view.rotated.plane[1].offset); 606 err = -EINVAL; 607 goto out_object; 608 } 609 } 610 611 i915_vma_unpin(vma); 612 613 cond_resched(); 614 } 615 } 616 } 617 } 618 } 619 620 out_object: 621 i915_gem_object_put(obj); 622 out: 623 return err; 624 } 625 626 static bool assert_partial(struct drm_i915_gem_object *obj, 627 struct i915_vma *vma, 628 unsigned long offset, 629 unsigned long size) 630 { 631 struct sgt_iter sgt; 632 dma_addr_t dma; 633 634 for_each_sgt_daddr(dma, sgt, vma->pages) { 635 dma_addr_t src; 636 637 if (!size) { 638 pr_err("Partial scattergather list too long\n"); 639 return false; 640 } 641 642 src = i915_gem_object_get_dma_address(obj, offset); 643 if (src != dma) { 644 pr_err("DMA mismatch for partial page offset %lu\n", 645 offset); 646 return false; 647 } 648 649 offset++; 650 size--; 651 } 652 653 return true; 654 } 655 656 static bool assert_pin(struct i915_vma *vma, 657 struct i915_ggtt_view *view, 658 u64 size, 659 const char *name) 660 { 661 bool ok = true; 662 663 if (vma->size != size) { 664 pr_err("(%s) VMA is wrong size, expected %llu, found %llu\n", 665 name, size, vma->size); 666 ok = false; 667 } 668 669 if (vma->node.size < vma->size) { 670 pr_err("(%s) VMA binding too small, expected %llu, found %llu\n", 671 name, vma->size, vma->node.size); 672 ok = false; 673 } 674 675 if (view && view->type != I915_GGTT_VIEW_NORMAL) { 676 if (memcmp(&vma->ggtt_view, view, sizeof(*view))) { 677 pr_err("(%s) VMA mismatch upon creation!\n", 678 name); 679 ok = false; 680 } 681 682 if (vma->pages == vma->obj->mm.pages) { 683 pr_err("(%s) VMA using original object pages!\n", 684 name); 685 ok = false; 686 } 687 } else { 688 if (vma->ggtt_view.type != I915_GGTT_VIEW_NORMAL) { 689 pr_err("Not the normal ggtt view! Found %d\n", 690 vma->ggtt_view.type); 691 ok = false; 692 } 693 694 if (vma->pages != vma->obj->mm.pages) { 695 pr_err("VMA not using object pages!\n"); 696 ok = false; 697 } 698 } 699 700 return ok; 701 } 702 703 static int igt_vma_partial(void *arg) 704 { 705 struct i915_ggtt *ggtt = arg; 706 struct i915_address_space *vm = &ggtt->vm; 707 const unsigned int npages = 1021; /* prime! */ 708 struct drm_i915_gem_object *obj; 709 const struct phase { 710 const char *name; 711 } phases[] = { 712 { "create" }, 713 { "lookup" }, 714 { }, 715 }, *p; 716 unsigned int sz, offset; 717 struct i915_vma *vma; 718 int err = -ENOMEM; 719 720 /* Create lots of different VMA for the object and check that 721 * we are returned the same VMA when we later request the same range. 722 */ 723 724 obj = i915_gem_object_create_internal(vm->i915, npages * PAGE_SIZE); 725 if (IS_ERR(obj)) 726 goto out; 727 728 for (p = phases; p->name; p++) { /* exercise both create/lookup */ 729 unsigned int count, nvma; 730 731 nvma = 0; 732 for_each_prime_number_from(sz, 1, npages) { 733 for_each_prime_number_from(offset, 0, npages - sz) { 734 struct i915_ggtt_view view; 735 736 view.type = I915_GGTT_VIEW_PARTIAL; 737 view.partial.offset = offset; 738 view.partial.size = sz; 739 740 if (sz == npages) 741 view.type = I915_GGTT_VIEW_NORMAL; 742 743 vma = checked_vma_instance(obj, vm, &view); 744 if (IS_ERR(vma)) { 745 err = PTR_ERR(vma); 746 goto out_object; 747 } 748 749 err = i915_vma_pin(vma, 0, 0, PIN_GLOBAL); 750 if (err) 751 goto out_object; 752 753 if (!assert_pin(vma, &view, sz*PAGE_SIZE, p->name)) { 754 pr_err("(%s) Inconsistent partial pinning for (offset=%d, size=%d)\n", 755 p->name, offset, sz); 756 err = -EINVAL; 757 goto out_object; 758 } 759 760 if (!assert_partial(obj, vma, offset, sz)) { 761 pr_err("(%s) Inconsistent partial pages for (offset=%d, size=%d)\n", 762 p->name, offset, sz); 763 err = -EINVAL; 764 goto out_object; 765 } 766 767 i915_vma_unpin(vma); 768 nvma++; 769 770 cond_resched(); 771 } 772 } 773 774 count = 0; 775 list_for_each_entry(vma, &obj->vma.list, obj_link) 776 count++; 777 if (count != nvma) { 778 pr_err("(%s) All partial vma were not recorded on the obj->vma_list: found %u, expected %u\n", 779 p->name, count, nvma); 780 err = -EINVAL; 781 goto out_object; 782 } 783 784 /* Check that we did create the whole object mapping */ 785 vma = checked_vma_instance(obj, vm, NULL); 786 if (IS_ERR(vma)) { 787 err = PTR_ERR(vma); 788 goto out_object; 789 } 790 791 err = i915_vma_pin(vma, 0, 0, PIN_GLOBAL); 792 if (err) 793 goto out_object; 794 795 if (!assert_pin(vma, NULL, obj->base.size, p->name)) { 796 pr_err("(%s) inconsistent full pin\n", p->name); 797 err = -EINVAL; 798 goto out_object; 799 } 800 801 i915_vma_unpin(vma); 802 803 count = 0; 804 list_for_each_entry(vma, &obj->vma.list, obj_link) 805 count++; 806 if (count != nvma) { 807 pr_err("(%s) allocated an extra full vma!\n", p->name); 808 err = -EINVAL; 809 goto out_object; 810 } 811 } 812 813 out_object: 814 i915_gem_object_put(obj); 815 out: 816 return err; 817 } 818 819 int i915_vma_mock_selftests(void) 820 { 821 static const struct i915_subtest tests[] = { 822 SUBTEST(igt_vma_create), 823 SUBTEST(igt_vma_pin1), 824 SUBTEST(igt_vma_rotate_remap), 825 SUBTEST(igt_vma_partial), 826 }; 827 struct drm_i915_private *i915; 828 struct i915_ggtt *ggtt; 829 int err; 830 831 i915 = mock_gem_device(); 832 if (!i915) 833 return -ENOMEM; 834 835 ggtt = kmalloc(sizeof(*ggtt), GFP_KERNEL); 836 if (!ggtt) { 837 err = -ENOMEM; 838 goto out_put; 839 } 840 mock_init_ggtt(i915, ggtt); 841 842 err = i915_subtests(tests, ggtt); 843 844 mock_device_flush(i915); 845 i915_gem_drain_freed_objects(i915); 846 mock_fini_ggtt(ggtt); 847 kfree(ggtt); 848 out_put: 849 drm_dev_put(&i915->drm); 850 return err; 851 } 852 853 static int igt_vma_remapped_gtt(void *arg) 854 { 855 struct drm_i915_private *i915 = arg; 856 const struct intel_remapped_plane_info planes[] = { 857 { .width = 1, .height = 1, .stride = 1 }, 858 { .width = 2, .height = 2, .stride = 2 }, 859 { .width = 4, .height = 4, .stride = 4 }, 860 { .width = 8, .height = 8, .stride = 8 }, 861 862 { .width = 3, .height = 5, .stride = 3 }, 863 { .width = 3, .height = 5, .stride = 4 }, 864 { .width = 3, .height = 5, .stride = 5 }, 865 866 { .width = 5, .height = 3, .stride = 5 }, 867 { .width = 5, .height = 3, .stride = 7 }, 868 { .width = 5, .height = 3, .stride = 9 }, 869 870 { .width = 4, .height = 6, .stride = 6 }, 871 { .width = 6, .height = 4, .stride = 6 }, 872 { } 873 }, *p; 874 enum i915_ggtt_view_type types[] = { 875 I915_GGTT_VIEW_ROTATED, 876 I915_GGTT_VIEW_REMAPPED, 877 0, 878 }, *t; 879 struct drm_i915_gem_object *obj; 880 intel_wakeref_t wakeref; 881 int err = 0; 882 883 obj = i915_gem_object_create_internal(i915, 10 * 10 * PAGE_SIZE); 884 if (IS_ERR(obj)) 885 return PTR_ERR(obj); 886 887 wakeref = intel_runtime_pm_get(&i915->runtime_pm); 888 889 for (t = types; *t; t++) { 890 for (p = planes; p->width; p++) { 891 struct i915_ggtt_view view = { 892 .type = *t, 893 .rotated.plane[0] = *p, 894 }; 895 struct i915_vma *vma; 896 u32 __iomem *map; 897 unsigned int x, y; 898 int err; 899 900 i915_gem_object_lock(obj); 901 err = i915_gem_object_set_to_gtt_domain(obj, true); 902 i915_gem_object_unlock(obj); 903 if (err) 904 goto out; 905 906 vma = i915_gem_object_ggtt_pin(obj, &view, 0, 0, PIN_MAPPABLE); 907 if (IS_ERR(vma)) { 908 err = PTR_ERR(vma); 909 goto out; 910 } 911 912 GEM_BUG_ON(vma->ggtt_view.type != *t); 913 914 map = i915_vma_pin_iomap(vma); 915 i915_vma_unpin(vma); 916 if (IS_ERR(map)) { 917 err = PTR_ERR(map); 918 goto out; 919 } 920 921 for (y = 0 ; y < p->height; y++) { 922 for (x = 0 ; x < p->width; x++) { 923 unsigned int offset; 924 u32 val = y << 16 | x; 925 926 if (*t == I915_GGTT_VIEW_ROTATED) 927 offset = (x * p->height + y) * PAGE_SIZE; 928 else 929 offset = (y * p->width + x) * PAGE_SIZE; 930 931 iowrite32(val, &map[offset / sizeof(*map)]); 932 } 933 } 934 935 i915_vma_unpin_iomap(vma); 936 937 vma = i915_gem_object_ggtt_pin(obj, NULL, 0, 0, PIN_MAPPABLE); 938 if (IS_ERR(vma)) { 939 err = PTR_ERR(vma); 940 goto out; 941 } 942 943 GEM_BUG_ON(vma->ggtt_view.type != I915_GGTT_VIEW_NORMAL); 944 945 map = i915_vma_pin_iomap(vma); 946 i915_vma_unpin(vma); 947 if (IS_ERR(map)) { 948 err = PTR_ERR(map); 949 goto out; 950 } 951 952 for (y = 0 ; y < p->height; y++) { 953 for (x = 0 ; x < p->width; x++) { 954 unsigned int offset, src_idx; 955 u32 exp = y << 16 | x; 956 u32 val; 957 958 if (*t == I915_GGTT_VIEW_ROTATED) 959 src_idx = rotated_index(&view.rotated, 0, x, y); 960 else 961 src_idx = remapped_index(&view.remapped, 0, x, y); 962 offset = src_idx * PAGE_SIZE; 963 964 val = ioread32(&map[offset / sizeof(*map)]); 965 if (val != exp) { 966 pr_err("%s VMA write test failed, expected 0x%x, found 0x%x\n", 967 *t == I915_GGTT_VIEW_ROTATED ? "Rotated" : "Remapped", 968 val, exp); 969 i915_vma_unpin_iomap(vma); 970 goto out; 971 } 972 } 973 } 974 i915_vma_unpin_iomap(vma); 975 976 cond_resched(); 977 } 978 } 979 980 out: 981 intel_runtime_pm_put(&i915->runtime_pm, wakeref); 982 i915_gem_object_put(obj); 983 984 return err; 985 } 986 987 int i915_vma_live_selftests(struct drm_i915_private *i915) 988 { 989 static const struct i915_subtest tests[] = { 990 SUBTEST(igt_vma_remapped_gtt), 991 }; 992 993 return i915_subtests(tests, i915); 994 } 995
Indexes created Sun Sep 28 16:09:52 GMT 2025