1 /* 2 * Copyright © 2016 Intel Corporation 3 * 4 * Permission is hereby granted, free of charge, to any person obtaining a 5 * copy of this software and associated documentation files (the "Software"), 6 * to deal in the Software without restriction, including without limitation 7 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 8 * and/or sell copies of the Software, and to permit persons to whom the 9 * Software is furnished to do so, subject to the following conditions: 10 * 11 * The above copyright notice and this permission notice (including the next 12 * paragraph) shall be included in all copies or substantial portions of the 13 * Software. 14 * 15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS 21 * IN THE SOFTWARE. 22 * 23 */ 24 25 #include <linux/prime_numbers.h> 26 27 #include "gem/i915_gem_context.h" 28 #include "gem/selftests/mock_context.h" 29 30 #include "i915_scatterlist.h" 31 #include "i915_selftest.h" 32 33 #include "mock_gem_device.h" 34 #include "mock_gtt.h" 35 36 static bool assert_vma(struct i915_vma *vma, 37 struct drm_i915_gem_object *obj, 38 struct i915_gem_context *ctx) 39 { 40 bool ok = true; 41 42 if (vma->vm != rcu_access_pointer(ctx->vm)) { 43 pr_err("VMA created with wrong VM\n"); 44 ok = false; 45 } 46 47 if (vma->size != obj->base.size) { 48 pr_err("VMA created with wrong size, found %llu, expected %zu\n", 49 vma->size, obj->base.size); 50 ok = false; 51 } 52 53 if (vma->ggtt_view.type != I915_GGTT_VIEW_NORMAL) { 54 pr_err("VMA created with wrong type [%d]\n", 55 vma->ggtt_view.type); 56 ok = false; 57 } 58 59 return ok; 60 } 61 62 static struct i915_vma * 63 checked_vma_instance(struct drm_i915_gem_object *obj, 64 struct i915_address_space *vm, 65 const struct i915_ggtt_view *view) 66 { 67 struct i915_vma *vma; 68 bool ok = true; 69 70 vma = i915_vma_instance(obj, vm, view); 71 if (IS_ERR(vma)) 72 return vma; 73 74 /* Manual checks, will be reinforced by i915_vma_compare! */ 75 if (vma->vm != vm) { 76 pr_err("VMA's vm [%p] does not match request [%p]\n", 77 vma->vm, vm); 78 ok = false; 79 } 80 81 if (i915_is_ggtt(vm) != i915_vma_is_ggtt(vma)) { 82 pr_err("VMA ggtt status [%d] does not match parent [%d]\n", 83 i915_vma_is_ggtt(vma), i915_is_ggtt(vm)); 84 ok = false; 85 } 86 87 if (i915_vma_compare(vma, vm, view)) { 88 pr_err("i915_vma_compare failed with create parameters!\n"); 89 return ERR_PTR(-EINVAL); 90 } 91 92 if (i915_vma_compare(vma, vma->vm, 93 i915_vma_is_ggtt(vma) ? &vma->ggtt_view : NULL)) { 94 pr_err("i915_vma_compare failed with itself\n"); 95 return ERR_PTR(-EINVAL); 96 } 97 98 if (!ok) { 99 pr_err("i915_vma_compare failed to detect the difference!\n"); 100 return ERR_PTR(-EINVAL); 101 } 102 103 return vma; 104 } 105 106 static int create_vmas(struct drm_i915_private *i915, 107 struct list_head *objects, 108 struct list_head *contexts) 109 { 110 struct drm_i915_gem_object *obj; 111 struct i915_gem_context *ctx; 112 int pinned; 113 114 list_for_each_entry(obj, objects, st_link) { 115 for (pinned = 0; pinned <= 1; pinned++) { 116 list_for_each_entry(ctx, contexts, link) { 117 struct i915_address_space *vm; 118 struct i915_vma *vma; 119 int err; 120 121 vm = i915_gem_context_get_vm_rcu(ctx); 122 vma = checked_vma_instance(obj, vm, NULL); 123 i915_vm_put(vm); 124 if (IS_ERR(vma)) 125 return PTR_ERR(vma); 126 127 if (!assert_vma(vma, obj, ctx)) { 128 pr_err("VMA lookup/create failed\n"); 129 return -EINVAL; 130 } 131 132 if (!pinned) { 133 err = i915_vma_pin(vma, 0, 0, PIN_USER); 134 if (err) { 135 pr_err("Failed to pin VMA\n"); 136 return err; 137 } 138 } else { 139 i915_vma_unpin(vma); 140 } 141 } 142 } 143 } 144 145 return 0; 146 } 147 148 static int igt_vma_create(void *arg) 149 { 150 struct i915_ggtt *ggtt = arg; 151 struct drm_i915_private *i915 = ggtt->vm.i915; 152 struct drm_i915_gem_object *obj, *on; 153 struct i915_gem_context *ctx, *cn; 154 unsigned long num_obj, num_ctx; 155 unsigned long no, nc; 156 IGT_TIMEOUT(end_time); 157 LIST_HEAD(contexts); 158 LIST_HEAD(objects); 159 int err = -ENOMEM; 160 161 /* Exercise creating many vma amonst many objections, checking the 162 * vma creation and lookup routines. 163 */ 164 165 no = 0; 166 for_each_prime_number(num_obj, ULONG_MAX - 1) { 167 for (; no < num_obj; no++) { 168 obj = i915_gem_object_create_internal(i915, PAGE_SIZE); 169 if (IS_ERR(obj)) 170 goto out; 171 172 list_add(&obj->st_link, &objects); 173 } 174 175 nc = 0; 176 for_each_prime_number(num_ctx, 2 * BITS_PER_LONG) { 177 for (; nc < num_ctx; nc++) { 178 ctx = mock_context(i915, "mock"); 179 if (!ctx) 180 goto out; 181 182 list_move(&ctx->link, &contexts); 183 } 184 185 err = create_vmas(i915, &objects, &contexts); 186 if (err) 187 goto out; 188 189 if (igt_timeout(end_time, 190 "%s timed out: after %lu objects in %lu contexts\n", 191 __func__, no, nc)) 192 goto end; 193 } 194 195 list_for_each_entry_safe(ctx, cn, &contexts, link) { 196 list_del_init(&ctx->link); 197 mock_context_close(ctx); 198 } 199 200 cond_resched(); 201 } 202 203 end: 204 /* Final pass to lookup all created contexts */ 205 err = create_vmas(i915, &objects, &contexts); 206 out: 207 list_for_each_entry_safe(ctx, cn, &contexts, link) { 208 list_del_init(&ctx->link); 209 mock_context_close(ctx); 210 } 211 212 list_for_each_entry_safe(obj, on, &objects, st_link) 213 i915_gem_object_put(obj); 214 return err; 215 } 216 217 struct pin_mode { 218 u64 size; 219 u64 flags; 220 bool (*assert)(const struct i915_vma *, 221 const struct pin_mode *mode, 222 int result); 223 const char *string; 224 }; 225 226 static bool assert_pin_valid(const struct i915_vma *vma, 227 const struct pin_mode *mode, 228 int result) 229 { 230 if (result) 231 return false; 232 233 if (i915_vma_misplaced(vma, mode->size, 0, mode->flags)) 234 return false; 235 236 return true; 237 } 238 239 __maybe_unused 240 static bool assert_pin_enospc(const struct i915_vma *vma, 241 const struct pin_mode *mode, 242 int result) 243 { 244 return result == -ENOSPC; 245 } 246 247 __maybe_unused 248 static bool assert_pin_einval(const struct i915_vma *vma, 249 const struct pin_mode *mode, 250 int result) 251 { 252 return result == -EINVAL; 253 } 254 255 static int igt_vma_pin1(void *arg) 256 { 257 struct i915_ggtt *ggtt = arg; 258 const struct pin_mode modes[] = { 259 #define VALID(sz, fl) { .size = (sz), .flags = (fl), .assert = assert_pin_valid, .string = #sz ", " #fl ", (valid) " } 260 #define __INVALID(sz, fl, check, eval) { .size = (sz), .flags = (fl), .assert = (check), .string = #sz ", " #fl ", (invalid " #eval ")" } 261 #define INVALID(sz, fl) __INVALID(sz, fl, assert_pin_einval, EINVAL) 262 #define NOSPACE(sz, fl) __INVALID(sz, fl, assert_pin_enospc, ENOSPC) 263 VALID(0, PIN_GLOBAL), 264 VALID(0, PIN_GLOBAL | PIN_MAPPABLE), 265 266 VALID(0, PIN_GLOBAL | PIN_OFFSET_BIAS | 4096), 267 VALID(0, PIN_GLOBAL | PIN_OFFSET_BIAS | 8192), 268 VALID(0, PIN_GLOBAL | PIN_OFFSET_BIAS | (ggtt->mappable_end - 4096)), 269 VALID(0, PIN_GLOBAL | PIN_MAPPABLE | PIN_OFFSET_BIAS | (ggtt->mappable_end - 4096)), 270 VALID(0, PIN_GLOBAL | PIN_OFFSET_BIAS | (ggtt->vm.total - 4096)), 271 272 VALID(0, PIN_GLOBAL | PIN_MAPPABLE | PIN_OFFSET_FIXED | (ggtt->mappable_end - 4096)), 273 INVALID(0, PIN_GLOBAL | PIN_MAPPABLE | PIN_OFFSET_FIXED | ggtt->mappable_end), 274 VALID(0, PIN_GLOBAL | PIN_OFFSET_FIXED | (ggtt->vm.total - 4096)), 275 INVALID(0, PIN_GLOBAL | PIN_OFFSET_FIXED | ggtt->vm.total), 276 INVALID(0, PIN_GLOBAL | PIN_OFFSET_FIXED | round_down(U64_MAX, PAGE_SIZE)), 277 278 VALID(4096, PIN_GLOBAL), 279 VALID(8192, PIN_GLOBAL), 280 VALID(ggtt->mappable_end - 4096, PIN_GLOBAL | PIN_MAPPABLE), 281 VALID(ggtt->mappable_end, PIN_GLOBAL | PIN_MAPPABLE), 282 NOSPACE(ggtt->mappable_end + 4096, PIN_GLOBAL | PIN_MAPPABLE), 283 VALID(ggtt->vm.total - 4096, PIN_GLOBAL), 284 VALID(ggtt->vm.total, PIN_GLOBAL), 285 NOSPACE(ggtt->vm.total + 4096, PIN_GLOBAL), 286 NOSPACE(round_down(U64_MAX, PAGE_SIZE), PIN_GLOBAL), 287 INVALID(8192, PIN_GLOBAL | PIN_MAPPABLE | PIN_OFFSET_FIXED | (ggtt->mappable_end - 4096)), 288 INVALID(8192, PIN_GLOBAL | PIN_OFFSET_FIXED | (ggtt->vm.total - 4096)), 289 INVALID(8192, PIN_GLOBAL | PIN_OFFSET_FIXED | (round_down(U64_MAX, PAGE_SIZE) - 4096)), 290 291 VALID(8192, PIN_GLOBAL | PIN_OFFSET_BIAS | (ggtt->mappable_end - 4096)), 292 293 #if !IS_ENABLED(CONFIG_DRM_I915_DEBUG_GEM) 294 /* Misusing BIAS is a programming error (it is not controllable 295 * from userspace) so when debugging is enabled, it explodes. 296 * However, the tests are still quite interesting for checking 297 * variable start, end and size. 298 */ 299 NOSPACE(0, PIN_GLOBAL | PIN_MAPPABLE | PIN_OFFSET_BIAS | ggtt->mappable_end), 300 NOSPACE(0, PIN_GLOBAL | PIN_OFFSET_BIAS | ggtt->vm.total), 301 NOSPACE(8192, PIN_GLOBAL | PIN_MAPPABLE | PIN_OFFSET_BIAS | (ggtt->mappable_end - 4096)), 302 NOSPACE(8192, PIN_GLOBAL | PIN_OFFSET_BIAS | (ggtt->vm.total - 4096)), 303 #endif 304 { }, 305 #undef NOSPACE 306 #undef INVALID 307 #undef __INVALID 308 #undef VALID 309 }, *m; 310 struct drm_i915_gem_object *obj; 311 struct i915_vma *vma; 312 int err = -EINVAL; 313 314 /* Exercise all the weird and wonderful i915_vma_pin requests, 315 * focusing on error handling of boundary conditions. 316 */ 317 318 GEM_BUG_ON(!drm_mm_clean(&ggtt->vm.mm)); 319 320 obj = i915_gem_object_create_internal(ggtt->vm.i915, PAGE_SIZE); 321 if (IS_ERR(obj)) 322 return PTR_ERR(obj); 323 324 vma = checked_vma_instance(obj, &ggtt->vm, NULL); 325 if (IS_ERR(vma)) 326 goto out; 327 328 for (m = modes; m->assert; m++) { 329 err = i915_vma_pin(vma, m->size, 0, m->flags); 330 if (!m->assert(vma, m, err)) { 331 pr_err("%s to pin single page into GGTT with mode[%d:%s]: size=%llx flags=%llx, err=%d\n", 332 m->assert == assert_pin_valid ? "Failed" : "Unexpectedly succeeded", 333 (int)(m - modes), m->string, m->size, m->flags, 334 err); 335 if (!err) 336 i915_vma_unpin(vma); 337 err = -EINVAL; 338 goto out; 339 } 340 341 if (!err) { 342 i915_vma_unpin(vma); 343 err = i915_vma_unbind(vma); 344 if (err) { 345 pr_err("Failed to unbind single page from GGTT, err=%d\n", err); 346 goto out; 347 } 348 } 349 350 cond_resched(); 351 } 352 353 err = 0; 354 out: 355 i915_gem_object_put(obj); 356 return err; 357 } 358 359 static unsigned long rotated_index(const struct intel_rotation_info *r, 360 unsigned int n, 361 unsigned int x, 362 unsigned int y) 363 { 364 return (r->plane[n].src_stride * (r->plane[n].height - y - 1) + 365 r->plane[n].offset + x); 366 } 367 368 static struct scatterlist * 369 assert_rotated(struct drm_i915_gem_object *obj, 370 const struct intel_rotation_info *r, unsigned int n, 371 struct scatterlist *sg) 372 { 373 unsigned int x, y; 374 375 for (x = 0; x < r->plane[n].width; x++) { 376 unsigned int left; 377 378 for (y = 0; y < r->plane[n].height; y++) { 379 unsigned long src_idx; 380 dma_addr_t src; 381 382 if (!sg) { 383 pr_err("Invalid sg table: too short at plane %d, (%d, %d)!\n", 384 n, x, y); 385 return ERR_PTR(-EINVAL); 386 } 387 388 src_idx = rotated_index(r, n, x, y); 389 src = i915_gem_object_get_dma_address(obj, src_idx); 390 391 if (sg_dma_len(sg) != PAGE_SIZE) { 392 pr_err("Invalid sg.length, found %d, expected %lu for rotated page (%d, %d) [src index %lu]\n", 393 sg_dma_len(sg), PAGE_SIZE, 394 x, y, src_idx); 395 return ERR_PTR(-EINVAL); 396 } 397 398 if (sg_dma_address(sg) != src) { 399 pr_err("Invalid address for rotated page (%d, %d) [src index %lu]\n", 400 x, y, src_idx); 401 return ERR_PTR(-EINVAL); 402 } 403 404 sg = sg_next(sg); 405 } 406 407 left = (r->plane[n].dst_stride - y) * PAGE_SIZE; 408 409 if (!left) 410 continue; 411 412 if (!sg) { 413 pr_err("Invalid sg table: too short at plane %d, (%d, %d)!\n", 414 n, x, y); 415 return ERR_PTR(-EINVAL); 416 } 417 418 if (sg_dma_len(sg) != left) { 419 pr_err("Invalid sg.length, found %d, expected %u for rotated page (%d, %d)\n", 420 sg_dma_len(sg), left, x, y); 421 return ERR_PTR(-EINVAL); 422 } 423 424 if (sg_dma_address(sg) != 0) { 425 pr_err("Invalid address, found %pad, expected 0 for remapped page (%d, %d)\n", 426 &sg_dma_address(sg), x, y); 427 return ERR_PTR(-EINVAL); 428 } 429 430 sg = sg_next(sg); 431 } 432 433 return sg; 434 } 435 436 static unsigned long remapped_index(const struct intel_remapped_info *r, 437 unsigned int n, 438 unsigned int x, 439 unsigned int y) 440 { 441 return (r->plane[n].src_stride * y + 442 r->plane[n].offset + x); 443 } 444 445 static struct scatterlist * 446 assert_remapped(struct drm_i915_gem_object *obj, 447 const struct intel_remapped_info *r, unsigned int n, 448 struct scatterlist *sg) 449 { 450 unsigned int x, y; 451 unsigned int left = 0; 452 unsigned int offset; 453 454 for (y = 0; y < r->plane[n].height; y++) { 455 for (x = 0; x < r->plane[n].width; x++) { 456 unsigned long src_idx; 457 dma_addr_t src; 458 459 if (!sg) { 460 pr_err("Invalid sg table: too short at plane %d, (%d, %d)!\n", 461 n, x, y); 462 return ERR_PTR(-EINVAL); 463 } 464 if (!left) { 465 offset = 0; 466 left = sg_dma_len(sg); 467 } 468 469 src_idx = remapped_index(r, n, x, y); 470 src = i915_gem_object_get_dma_address(obj, src_idx); 471 472 if (left < PAGE_SIZE || left & (PAGE_SIZE-1)) { 473 pr_err("Invalid sg.length, found %d, expected %lu for remapped page (%d, %d) [src index %lu]\n", 474 sg_dma_len(sg), PAGE_SIZE, 475 x, y, src_idx); 476 return ERR_PTR(-EINVAL); 477 } 478 479 if (sg_dma_address(sg) + offset != src) { 480 pr_err("Invalid address for remapped page (%d, %d) [src index %lu]\n", 481 x, y, src_idx); 482 return ERR_PTR(-EINVAL); 483 } 484 485 left -= PAGE_SIZE; 486 offset += PAGE_SIZE; 487 488 489 if (!left) 490 sg = sg_next(sg); 491 } 492 493 if (left) { 494 pr_err("Unexpected sg tail with %d size for remapped page (%d, %d)\n", 495 left, 496 x, y); 497 return ERR_PTR(-EINVAL); 498 } 499 500 left = (r->plane[n].dst_stride - r->plane[n].width) * PAGE_SIZE; 501 502 if (!left) 503 continue; 504 505 if (!sg) { 506 pr_err("Invalid sg table: too short at plane %d, (%d, %d)!\n", 507 n, x, y); 508 return ERR_PTR(-EINVAL); 509 } 510 511 if (sg_dma_len(sg) != left) { 512 pr_err("Invalid sg.length, found %u, expected %u for remapped page (%d, %d)\n", 513 sg_dma_len(sg), left, 514 x, y); 515 return ERR_PTR(-EINVAL); 516 } 517 518 if (sg_dma_address(sg) != 0) { 519 pr_err("Invalid address, found %pad, expected 0 for remapped page (%d, %d)\n", 520 &sg_dma_address(sg), 521 x, y); 522 return ERR_PTR(-EINVAL); 523 } 524 525 sg = sg_next(sg); 526 left = 0; 527 } 528 529 return sg; 530 } 531 532 static unsigned int remapped_size(enum i915_ggtt_view_type view_type, 533 const struct intel_remapped_plane_info *a, 534 const struct intel_remapped_plane_info *b) 535 { 536 537 if (view_type == I915_GGTT_VIEW_ROTATED) 538 return a->dst_stride * a->width + b->dst_stride * b->width; 539 else 540 return a->dst_stride * a->height + b->dst_stride * b->height; 541 } 542 543 static int igt_vma_rotate_remap(void *arg) 544 { 545 struct i915_ggtt *ggtt = arg; 546 struct i915_address_space *vm = &ggtt->vm; 547 struct drm_i915_gem_object *obj; 548 const struct intel_remapped_plane_info planes[] = { 549 { .width = 1, .height = 1, .src_stride = 1 }, 550 { .width = 2, .height = 2, .src_stride = 2 }, 551 { .width = 4, .height = 4, .src_stride = 4 }, 552 { .width = 8, .height = 8, .src_stride = 8 }, 553 554 { .width = 3, .height = 5, .src_stride = 3 }, 555 { .width = 3, .height = 5, .src_stride = 4 }, 556 { .width = 3, .height = 5, .src_stride = 5 }, 557 558 { .width = 5, .height = 3, .src_stride = 5 }, 559 { .width = 5, .height = 3, .src_stride = 7 }, 560 { .width = 5, .height = 3, .src_stride = 9 }, 561 562 { .width = 4, .height = 6, .src_stride = 6 }, 563 { .width = 6, .height = 4, .src_stride = 6 }, 564 565 { .width = 2, .height = 2, .src_stride = 2, .dst_stride = 2 }, 566 { .width = 3, .height = 3, .src_stride = 3, .dst_stride = 4 }, 567 { .width = 5, .height = 6, .src_stride = 7, .dst_stride = 8 }, 568 569 { } 570 }, *a, *b; 571 enum i915_ggtt_view_type types[] = { 572 I915_GGTT_VIEW_ROTATED, 573 I915_GGTT_VIEW_REMAPPED, 574 0, 575 }, *t; 576 const unsigned int max_pages = 64; 577 int err = -ENOMEM; 578 579 /* Create VMA for many different combinations of planes and check 580 * that the page layout within the rotated VMA match our expectations. 581 */ 582 583 obj = i915_gem_object_create_internal(vm->i915, max_pages * PAGE_SIZE); 584 if (IS_ERR(obj)) 585 goto out; 586 587 for (t = types; *t; t++) { 588 for (a = planes; a->width; a++) { 589 for (b = planes + ARRAY_SIZE(planes); b-- != planes; ) { 590 struct i915_ggtt_view view = { 591 .type = *t, 592 .remapped.plane[0] = *a, 593 .remapped.plane[1] = *b, 594 }; 595 struct intel_remapped_plane_info *plane_info = view.remapped.plane; 596 unsigned int n, max_offset; 597 598 max_offset = max(plane_info[0].src_stride * plane_info[0].height, 599 plane_info[1].src_stride * plane_info[1].height); 600 GEM_BUG_ON(max_offset > max_pages); 601 max_offset = max_pages - max_offset; 602 603 if (!plane_info[0].dst_stride) 604 plane_info[0].dst_stride = view.type == I915_GGTT_VIEW_ROTATED ? 605 plane_info[0].height : 606 plane_info[0].width; 607 if (!plane_info[1].dst_stride) 608 plane_info[1].dst_stride = view.type == I915_GGTT_VIEW_ROTATED ? 609 plane_info[1].height : 610 plane_info[1].width; 611 612 for_each_prime_number_from(plane_info[0].offset, 0, max_offset) { 613 for_each_prime_number_from(plane_info[1].offset, 0, max_offset) { 614 struct scatterlist *sg; 615 struct i915_vma *vma; 616 unsigned int expected_pages; 617 618 vma = checked_vma_instance(obj, vm, &view); 619 if (IS_ERR(vma)) { 620 err = PTR_ERR(vma); 621 goto out_object; 622 } 623 624 err = i915_vma_pin(vma, 0, 0, PIN_GLOBAL); 625 if (err) { 626 pr_err("Failed to pin VMA, err=%d\n", err); 627 goto out_object; 628 } 629 630 expected_pages = remapped_size(view.type, &plane_info[0], &plane_info[1]); 631 632 if (view.type == I915_GGTT_VIEW_ROTATED && 633 vma->size != expected_pages * PAGE_SIZE) { 634 pr_err("VMA is wrong size, expected %lu, found %llu\n", 635 PAGE_SIZE * expected_pages, vma->size); 636 err = -EINVAL; 637 goto out_object; 638 } 639 640 if (view.type == I915_GGTT_VIEW_REMAPPED && 641 vma->size > expected_pages * PAGE_SIZE) { 642 pr_err("VMA is wrong size, expected %lu, found %llu\n", 643 PAGE_SIZE * expected_pages, vma->size); 644 err = -EINVAL; 645 goto out_object; 646 } 647 648 if (vma->pages->nents > expected_pages) { 649 pr_err("sg table is wrong sizeo, expected %u, found %u nents\n", 650 expected_pages, vma->pages->nents); 651 err = -EINVAL; 652 goto out_object; 653 } 654 655 if (vma->node.size < vma->size) { 656 pr_err("VMA binding too small, expected %llu, found %llu\n", 657 vma->size, vma->node.size); 658 err = -EINVAL; 659 goto out_object; 660 } 661 662 if (vma->pages == obj->mm.pages) { 663 pr_err("VMA using unrotated object pages!\n"); 664 err = -EINVAL; 665 goto out_object; 666 } 667 668 sg = vma->pages->sgl; 669 for (n = 0; n < ARRAY_SIZE(view.rotated.plane); n++) { 670 if (view.type == I915_GGTT_VIEW_ROTATED) 671 sg = assert_rotated(obj, &view.rotated, n, sg); 672 else 673 sg = assert_remapped(obj, &view.remapped, n, sg); 674 if (IS_ERR(sg)) { 675 pr_err("Inconsistent %s VMA pages for plane %d: [(%d, %d, %d, %d, %d), (%d, %d, %d, %d, %d)]\n", 676 view.type == I915_GGTT_VIEW_ROTATED ? 677 "rotated" : "remapped", n, 678 plane_info[0].width, 679 plane_info[0].height, 680 plane_info[0].src_stride, 681 plane_info[0].dst_stride, 682 plane_info[0].offset, 683 plane_info[1].width, 684 plane_info[1].height, 685 plane_info[1].src_stride, 686 plane_info[1].dst_stride, 687 plane_info[1].offset); 688 err = -EINVAL; 689 goto out_object; 690 } 691 } 692 693 i915_vma_unpin(vma); 694 695 cond_resched(); 696 } 697 } 698 } 699 } 700 } 701 702 out_object: 703 i915_gem_object_put(obj); 704 out: 705 return err; 706 } 707 708 static bool assert_partial(struct drm_i915_gem_object *obj, 709 struct i915_vma *vma, 710 unsigned long offset, 711 unsigned long size) 712 { 713 struct sgt_iter sgt; 714 dma_addr_t dma; 715 716 for_each_sgt_daddr(dma, sgt, vma->pages) { 717 dma_addr_t src; 718 719 if (!size) { 720 pr_err("Partial scattergather list too long\n"); 721 return false; 722 } 723 724 src = i915_gem_object_get_dma_address(obj, offset); 725 if (src != dma) { 726 pr_err("DMA mismatch for partial page offset %lu\n", 727 offset); 728 return false; 729 } 730 731 offset++; 732 size--; 733 } 734 735 return true; 736 } 737 738 static bool assert_pin(struct i915_vma *vma, 739 struct i915_ggtt_view *view, 740 u64 size, 741 const char *name) 742 { 743 bool ok = true; 744 745 if (vma->size != size) { 746 pr_err("(%s) VMA is wrong size, expected %llu, found %llu\n", 747 name, size, vma->size); 748 ok = false; 749 } 750 751 if (vma->node.size < vma->size) { 752 pr_err("(%s) VMA binding too small, expected %llu, found %llu\n", 753 name, vma->size, vma->node.size); 754 ok = false; 755 } 756 757 if (view && view->type != I915_GGTT_VIEW_NORMAL) { 758 if (memcmp(&vma->ggtt_view, view, sizeof(*view))) { 759 pr_err("(%s) VMA mismatch upon creation!\n", 760 name); 761 ok = false; 762 } 763 764 if (vma->pages == vma->obj->mm.pages) { 765 pr_err("(%s) VMA using original object pages!\n", 766 name); 767 ok = false; 768 } 769 } else { 770 if (vma->ggtt_view.type != I915_GGTT_VIEW_NORMAL) { 771 pr_err("Not the normal ggtt view! Found %d\n", 772 vma->ggtt_view.type); 773 ok = false; 774 } 775 776 if (vma->pages != vma->obj->mm.pages) { 777 pr_err("VMA not using object pages!\n"); 778 ok = false; 779 } 780 } 781 782 return ok; 783 } 784 785 static int igt_vma_partial(void *arg) 786 { 787 struct i915_ggtt *ggtt = arg; 788 struct i915_address_space *vm = &ggtt->vm; 789 const unsigned int npages = 1021; /* prime! */ 790 struct drm_i915_gem_object *obj; 791 const struct phase { 792 const char *name; 793 } phases[] = { 794 { "create" }, 795 { "lookup" }, 796 { }, 797 }, *p; 798 unsigned int sz, offset; 799 struct i915_vma *vma; 800 int err = -ENOMEM; 801 802 /* Create lots of different VMA for the object and check that 803 * we are returned the same VMA when we later request the same range. 804 */ 805 806 obj = i915_gem_object_create_internal(vm->i915, npages * PAGE_SIZE); 807 if (IS_ERR(obj)) 808 goto out; 809 810 for (p = phases; p->name; p++) { /* exercise both create/lookup */ 811 unsigned int count, nvma; 812 813 nvma = 0; 814 for_each_prime_number_from(sz, 1, npages) { 815 for_each_prime_number_from(offset, 0, npages - sz) { 816 struct i915_ggtt_view view; 817 818 view.type = I915_GGTT_VIEW_PARTIAL; 819 view.partial.offset = offset; 820 view.partial.size = sz; 821 822 if (sz == npages) 823 view.type = I915_GGTT_VIEW_NORMAL; 824 825 vma = checked_vma_instance(obj, vm, &view); 826 if (IS_ERR(vma)) { 827 err = PTR_ERR(vma); 828 goto out_object; 829 } 830 831 err = i915_vma_pin(vma, 0, 0, PIN_GLOBAL); 832 if (err) 833 goto out_object; 834 835 if (!assert_pin(vma, &view, sz*PAGE_SIZE, p->name)) { 836 pr_err("(%s) Inconsistent partial pinning for (offset=%d, size=%d)\n", 837 p->name, offset, sz); 838 err = -EINVAL; 839 goto out_object; 840 } 841 842 if (!assert_partial(obj, vma, offset, sz)) { 843 pr_err("(%s) Inconsistent partial pages for (offset=%d, size=%d)\n", 844 p->name, offset, sz); 845 err = -EINVAL; 846 goto out_object; 847 } 848 849 i915_vma_unpin(vma); 850 nvma++; 851 852 cond_resched(); 853 } 854 } 855 856 count = 0; 857 list_for_each_entry(vma, &obj->vma.list, obj_link) 858 count++; 859 if (count != nvma) { 860 pr_err("(%s) All partial vma were not recorded on the obj->vma_list: found %u, expected %u\n", 861 p->name, count, nvma); 862 err = -EINVAL; 863 goto out_object; 864 } 865 866 /* Check that we did create the whole object mapping */ 867 vma = checked_vma_instance(obj, vm, NULL); 868 if (IS_ERR(vma)) { 869 err = PTR_ERR(vma); 870 goto out_object; 871 } 872 873 err = i915_vma_pin(vma, 0, 0, PIN_GLOBAL); 874 if (err) 875 goto out_object; 876 877 if (!assert_pin(vma, NULL, obj->base.size, p->name)) { 878 pr_err("(%s) inconsistent full pin\n", p->name); 879 err = -EINVAL; 880 goto out_object; 881 } 882 883 i915_vma_unpin(vma); 884 885 count = 0; 886 list_for_each_entry(vma, &obj->vma.list, obj_link) 887 count++; 888 if (count != nvma) { 889 pr_err("(%s) allocated an extra full vma!\n", p->name); 890 err = -EINVAL; 891 goto out_object; 892 } 893 } 894 895 out_object: 896 i915_gem_object_put(obj); 897 out: 898 return err; 899 } 900 901 int i915_vma_mock_selftests(void) 902 { 903 static const struct i915_subtest tests[] = { 904 SUBTEST(igt_vma_create), 905 SUBTEST(igt_vma_pin1), 906 SUBTEST(igt_vma_rotate_remap), 907 SUBTEST(igt_vma_partial), 908 }; 909 struct drm_i915_private *i915; 910 struct i915_ggtt *ggtt; 911 int err; 912 913 i915 = mock_gem_device(); 914 if (!i915) 915 return -ENOMEM; 916 917 ggtt = kmalloc(sizeof(*ggtt), GFP_KERNEL); 918 if (!ggtt) { 919 err = -ENOMEM; 920 goto out_put; 921 } 922 mock_init_ggtt(i915, ggtt); 923 924 err = i915_subtests(tests, ggtt); 925 926 mock_device_flush(i915); 927 i915_gem_drain_freed_objects(i915); 928 mock_fini_ggtt(ggtt); 929 kfree(ggtt); 930 out_put: 931 mock_destroy_device(i915); 932 return err; 933 } 934 935 static int igt_vma_remapped_gtt(void *arg) 936 { 937 struct drm_i915_private *i915 = arg; 938 const struct intel_remapped_plane_info planes[] = { 939 { .width = 1, .height = 1, .src_stride = 1 }, 940 { .width = 2, .height = 2, .src_stride = 2 }, 941 { .width = 4, .height = 4, .src_stride = 4 }, 942 { .width = 8, .height = 8, .src_stride = 8 }, 943 944 { .width = 3, .height = 5, .src_stride = 3 }, 945 { .width = 3, .height = 5, .src_stride = 4 }, 946 { .width = 3, .height = 5, .src_stride = 5 }, 947 948 { .width = 5, .height = 3, .src_stride = 5 }, 949 { .width = 5, .height = 3, .src_stride = 7 }, 950 { .width = 5, .height = 3, .src_stride = 9 }, 951 952 { .width = 4, .height = 6, .src_stride = 6 }, 953 { .width = 6, .height = 4, .src_stride = 6 }, 954 955 { .width = 2, .height = 2, .src_stride = 2, .dst_stride = 2 }, 956 { .width = 3, .height = 3, .src_stride = 3, .dst_stride = 4 }, 957 { .width = 5, .height = 6, .src_stride = 7, .dst_stride = 8 }, 958 959 { } 960 }, *p; 961 enum i915_ggtt_view_type types[] = { 962 I915_GGTT_VIEW_ROTATED, 963 I915_GGTT_VIEW_REMAPPED, 964 0, 965 }, *t; 966 struct drm_i915_gem_object *obj; 967 intel_wakeref_t wakeref; 968 int err = 0; 969 970 obj = i915_gem_object_create_internal(i915, 10 * 10 * PAGE_SIZE); 971 if (IS_ERR(obj)) 972 return PTR_ERR(obj); 973 974 wakeref = intel_runtime_pm_get(&i915->runtime_pm); 975 976 for (t = types; *t; t++) { 977 for (p = planes; p->width; p++) { 978 struct i915_ggtt_view view = { 979 .type = *t, 980 .rotated.plane[0] = *p, 981 }; 982 struct intel_remapped_plane_info *plane_info = view.rotated.plane; 983 struct i915_vma *vma; 984 u32 __iomem *map; 985 unsigned int x, y; 986 987 i915_gem_object_lock(obj, NULL); 988 err = i915_gem_object_set_to_gtt_domain(obj, true); 989 i915_gem_object_unlock(obj); 990 if (err) 991 goto out; 992 993 if (!plane_info[0].dst_stride) 994 plane_info[0].dst_stride = *t == I915_GGTT_VIEW_ROTATED ? 995 p->height : p->width; 996 997 vma = i915_gem_object_ggtt_pin(obj, &view, 0, 0, PIN_MAPPABLE); 998 if (IS_ERR(vma)) { 999 err = PTR_ERR(vma); 1000 goto out; 1001 } 1002 1003 GEM_BUG_ON(vma->ggtt_view.type != *t); 1004 1005 map = i915_vma_pin_iomap(vma); 1006 i915_vma_unpin(vma); 1007 if (IS_ERR(map)) { 1008 err = PTR_ERR(map); 1009 goto out; 1010 } 1011 1012 for (y = 0 ; y < plane_info[0].height; y++) { 1013 for (x = 0 ; x < plane_info[0].width; x++) { 1014 unsigned int offset; 1015 u32 val = y << 16 | x; 1016 1017 if (*t == I915_GGTT_VIEW_ROTATED) 1018 offset = (x * plane_info[0].dst_stride + y) * PAGE_SIZE; 1019 else 1020 offset = (y * plane_info[0].dst_stride + x) * PAGE_SIZE; 1021 1022 iowrite32(val, &map[offset / sizeof(*map)]); 1023 } 1024 } 1025 1026 i915_vma_unpin_iomap(vma); 1027 1028 vma = i915_gem_object_ggtt_pin(obj, NULL, 0, 0, PIN_MAPPABLE); 1029 if (IS_ERR(vma)) { 1030 err = PTR_ERR(vma); 1031 goto out; 1032 } 1033 1034 GEM_BUG_ON(vma->ggtt_view.type != I915_GGTT_VIEW_NORMAL); 1035 1036 map = i915_vma_pin_iomap(vma); 1037 i915_vma_unpin(vma); 1038 if (IS_ERR(map)) { 1039 err = PTR_ERR(map); 1040 goto out; 1041 } 1042 1043 for (y = 0 ; y < plane_info[0].height; y++) { 1044 for (x = 0 ; x < plane_info[0].width; x++) { 1045 unsigned int offset, src_idx; 1046 u32 exp = y << 16 | x; 1047 u32 val; 1048 1049 if (*t == I915_GGTT_VIEW_ROTATED) 1050 src_idx = rotated_index(&view.rotated, 0, x, y); 1051 else 1052 src_idx = remapped_index(&view.remapped, 0, x, y); 1053 offset = src_idx * PAGE_SIZE; 1054 1055 val = ioread32(&map[offset / sizeof(*map)]); 1056 if (val != exp) { 1057 pr_err("%s VMA write test failed, expected 0x%x, found 0x%x\n", 1058 *t == I915_GGTT_VIEW_ROTATED ? "Rotated" : "Remapped", 1059 exp, val); 1060 i915_vma_unpin_iomap(vma); 1061 err = -EINVAL; 1062 goto out; 1063 } 1064 } 1065 } 1066 i915_vma_unpin_iomap(vma); 1067 1068 cond_resched(); 1069 } 1070 } 1071 1072 out: 1073 intel_runtime_pm_put(&i915->runtime_pm, wakeref); 1074 i915_gem_object_put(obj); 1075 1076 return err; 1077 } 1078 1079 int i915_vma_live_selftests(struct drm_i915_private *i915) 1080 { 1081 static const struct i915_subtest tests[] = { 1082 SUBTEST(igt_vma_remapped_gtt), 1083 }; 1084 1085 return i915_subtests(tests, i915); 1086 } 1087