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/sched/mm.h> 26#include <drm/drm_gem.h> 27 28#include "display/intel_frontbuffer.h" 29 30#include "gt/intel_engine.h" 31#include "gt/intel_engine_heartbeat.h" 32#include "gt/intel_gt.h" 33#include "gt/intel_gt_requests.h" 34 35#include "i915_drv.h" 36#include "i915_globals.h" 37#include "i915_sw_fence_work.h" 38#include "i915_trace.h" 39#include "i915_vma.h" 40 41static struct i915_global_vma { 42 struct i915_global base; 43 struct kmem_cache *slab_vmas; 44} global; 45 46struct i915_vma *i915_vma_alloc(void) 47{ 48 return kmem_cache_zalloc(global.slab_vmas, GFP_KERNEL); 49} 50 51void i915_vma_free(struct i915_vma *vma) 52{ 53 return kmem_cache_free(global.slab_vmas, vma); 54} 55 56#if IS_ENABLED(CONFIG_DRM_I915_ERRLOG_GEM) && IS_ENABLED(CONFIG_DRM_DEBUG_MM) 57 58#include <linux/stackdepot.h> 59 60static void vma_print_allocator(struct i915_vma *vma, const char *reason) 61{ 62 unsigned long *entries; 63 unsigned int nr_entries; 64 char buf[512]; 65 66 if (!vma->node.stack) { 67 DRM_DEBUG_DRIVER("vma.node [%08llx + %08llx] %s: unknown owner\n", 68 vma->node.start, vma->node.size, reason); 69 return; 70 } 71 72 nr_entries = stack_depot_fetch(vma->node.stack, &entries); 73 stack_trace_snprint(buf, sizeof(buf), entries, nr_entries, 0); 74 DRM_DEBUG_DRIVER("vma.node [%08llx + %08llx] %s: inserted at %s\n", 75 vma->node.start, vma->node.size, reason, buf); 76} 77 78#else 79 80static void vma_print_allocator(struct i915_vma *vma, const char *reason) 81{ 82} 83 84#endif 85 86static inline struct i915_vma *active_to_vma(struct i915_active *ref) 87{ 88 return container_of(ref, typeof(struct i915_vma), active); 89} 90 91static int __i915_vma_active(struct i915_active *ref) 92{ 93 return i915_vma_tryget(active_to_vma(ref)) ? 0 : -ENOENT; 94} 95 96__i915_active_call 97static void __i915_vma_retire(struct i915_active *ref) 98{ 99 i915_vma_put(active_to_vma(ref)); 100} 101 102static struct i915_vma * 103vma_create(struct drm_i915_gem_object *obj, 104 struct i915_address_space *vm, 105 const struct i915_ggtt_view *view) 106{ 107 struct i915_vma *pos = ERR_PTR(-E2BIG); 108 struct i915_vma *vma; 109 struct rb_node *rb, **p; 110 111 /* The aliasing_ppgtt should never be used directly! */ 112 GEM_BUG_ON(vm == &vm->gt->ggtt->alias->vm); 113 114 vma = i915_vma_alloc(); 115 if (vma == NULL) 116 return ERR_PTR(-ENOMEM); 117 118 kref_init(&vma->ref); 119 mutex_init(&vma->pages_mutex); 120 vma->vm = i915_vm_get(vm); 121 vma->ops = &vm->vma_ops; 122 vma->obj = obj; 123 vma->resv = obj->base.resv; 124 vma->size = obj->base.size; 125 vma->display_alignment = I915_GTT_MIN_ALIGNMENT; 126 127 i915_active_init(&vma->active, __i915_vma_active, __i915_vma_retire); 128 129 /* Declare ourselves safe for use inside shrinkers */ 130 if (IS_ENABLED(CONFIG_LOCKDEP)) { 131 fs_reclaim_acquire(GFP_KERNEL); 132 might_lock(&vma->active.mutex); 133 fs_reclaim_release(GFP_KERNEL); 134 } 135 136 INIT_LIST_HEAD(&vma->closed_link); 137 138 if (view && view->type != I915_GGTT_VIEW_NORMAL) { 139 vma->ggtt_view = *view; 140 if (view->type == I915_GGTT_VIEW_PARTIAL) { 141 GEM_BUG_ON(range_overflows_t(u64, 142 view->partial.offset, 143 view->partial.size, 144 obj->base.size >> PAGE_SHIFT)); 145 vma->size = view->partial.size; 146 vma->size <<= PAGE_SHIFT; 147 GEM_BUG_ON(vma->size > obj->base.size); 148 } else if (view->type == I915_GGTT_VIEW_ROTATED) { 149 vma->size = intel_rotation_info_size(&view->rotated); 150 vma->size <<= PAGE_SHIFT; 151 } else if (view->type == I915_GGTT_VIEW_REMAPPED) { 152 vma->size = intel_remapped_info_size(&view->remapped); 153 vma->size <<= PAGE_SHIFT; 154 } 155 } 156 157 if (unlikely(vma->size > vm->total)) 158 goto err_vma; 159 160 GEM_BUG_ON(!IS_ALIGNED(vma->size, I915_GTT_PAGE_SIZE)); 161 162 spin_lock(&obj->vma.lock); 163 164 if (i915_is_ggtt(vm)) { 165 if (unlikely(overflows_type(vma->size, u32))) 166 goto err_unlock; 167 168 vma->fence_size = i915_gem_fence_size(vm->i915, vma->size, 169 i915_gem_object_get_tiling(obj), 170 i915_gem_object_get_stride(obj)); 171 if (unlikely(vma->fence_size < vma->size || /* overflow */ 172 vma->fence_size > vm->total)) 173 goto err_unlock; 174 175 GEM_BUG_ON(!IS_ALIGNED(vma->fence_size, I915_GTT_MIN_ALIGNMENT)); 176 177 vma->fence_alignment = i915_gem_fence_alignment(vm->i915, vma->size, 178 i915_gem_object_get_tiling(obj), 179 i915_gem_object_get_stride(obj)); 180 GEM_BUG_ON(!is_power_of_2(vma->fence_alignment)); 181 182 __set_bit(I915_VMA_GGTT_BIT, __i915_vma_flags(vma)); 183 } 184 185 rb = NULL; 186 p = &obj->vma.tree.rb_node; 187 while (*p) { 188 long cmp; 189 190 rb = *p; 191 pos = rb_entry(rb, struct i915_vma, obj_node); 192 193 /* 194 * If the view already exists in the tree, another thread 195 * already created a matching vma, so return the older instance 196 * and dispose of ours. 197 */ 198 cmp = i915_vma_compare(pos, vm, view); 199 if (cmp < 0) 200 p = &rb->rb_right; 201 else if (cmp > 0) 202 p = &rb->rb_left; 203 else 204 goto err_unlock; 205 } 206 rb_link_node(&vma->obj_node, rb, p); 207 rb_insert_color(&vma->obj_node, &obj->vma.tree); 208 209 if (i915_vma_is_ggtt(vma)) 210 /* 211 * We put the GGTT vma at the start of the vma-list, followed 212 * by the ppGGTT vma. This allows us to break early when 213 * iterating over only the GGTT vma for an object, see 214 * for_each_ggtt_vma() 215 */ 216 list_add(&vma->obj_link, &obj->vma.list); 217 else 218 list_add_tail(&vma->obj_link, &obj->vma.list); 219 220 spin_unlock(&obj->vma.lock); 221 222 return vma; 223 224err_unlock: 225 spin_unlock(&obj->vma.lock); 226err_vma: 227 i915_vm_put(vm); 228 i915_vma_free(vma); 229 return pos; 230} 231 232static struct i915_vma * 233vma_lookup(struct drm_i915_gem_object *obj, 234 struct i915_address_space *vm, 235 const struct i915_ggtt_view *view) 236{ 237 struct rb_node *rb; 238 239 rb = obj->vma.tree.rb_node; 240 while (rb) { 241 struct i915_vma *vma = rb_entry(rb, struct i915_vma, obj_node); 242 long cmp; 243 244 cmp = i915_vma_compare(vma, vm, view); 245 if (cmp == 0) 246 return vma; 247 248 if (cmp < 0) 249 rb = rb->rb_right; 250 else 251 rb = rb->rb_left; 252 } 253 254 return NULL; 255} 256 257/** 258 * i915_vma_instance - return the singleton instance of the VMA 259 * @obj: parent &struct drm_i915_gem_object to be mapped 260 * @vm: address space in which the mapping is located 261 * @view: additional mapping requirements 262 * 263 * i915_vma_instance() looks up an existing VMA of the @obj in the @vm with 264 * the same @view characteristics. If a match is not found, one is created. 265 * Once created, the VMA is kept until either the object is freed, or the 266 * address space is closed. 267 * 268 * Returns the vma, or an error pointer. 269 */ 270struct i915_vma * 271i915_vma_instance(struct drm_i915_gem_object *obj, 272 struct i915_address_space *vm, 273 const struct i915_ggtt_view *view) 274{ 275 struct i915_vma *vma; 276 277 GEM_BUG_ON(view && !i915_is_ggtt(vm)); 278 GEM_BUG_ON(!atomic_read(&vm->open)); 279 280 spin_lock(&obj->vma.lock); 281 vma = vma_lookup(obj, vm, view); 282 spin_unlock(&obj->vma.lock); 283 284 /* vma_create() will resolve the race if another creates the vma */ 285 if (unlikely(!vma)) 286 vma = vma_create(obj, vm, view); 287 288 GEM_BUG_ON(!IS_ERR(vma) && i915_vma_compare(vma, vm, view)); 289 return vma; 290} 291 292struct i915_vma_work { 293 struct dma_fence_work base; 294 struct i915_address_space *vm; 295 struct i915_vm_pt_stash stash; 296 struct i915_vma *vma; 297 struct drm_i915_gem_object *pinned; 298 struct i915_sw_dma_fence_cb cb; 299 enum i915_cache_level cache_level; 300 unsigned int flags; 301}; 302 303static int __vma_bind(struct dma_fence_work *work) 304{ 305 struct i915_vma_work *vw = container_of(work, typeof(*vw), base); 306 struct i915_vma *vma = vw->vma; 307 308 vma->ops->bind_vma(vw->vm, &vw->stash, 309 vma, vw->cache_level, vw->flags); 310 return 0; 311} 312 313static void __vma_release(struct dma_fence_work *work) 314{ 315 struct i915_vma_work *vw = container_of(work, typeof(*vw), base); 316 317 if (vw->pinned) { 318 __i915_gem_object_unpin_pages(vw->pinned); 319 i915_gem_object_put(vw->pinned); 320 } 321 322 i915_vm_free_pt_stash(vw->vm, &vw->stash); 323 i915_vm_put(vw->vm); 324} 325 326static const struct dma_fence_work_ops bind_ops = { 327 .name = "bind", 328 .work = __vma_bind, 329 .release = __vma_release, 330}; 331 332struct i915_vma_work *i915_vma_work(void) 333{ 334 struct i915_vma_work *vw; 335 336 vw = kzalloc(sizeof(*vw), GFP_KERNEL); 337 if (!vw) 338 return NULL; 339 340 dma_fence_work_init(&vw->base, &bind_ops); 341 vw->base.dma.error = -EAGAIN; /* disable the worker by default */ 342 343 return vw; 344} 345 346int i915_vma_wait_for_bind(struct i915_vma *vma) 347{ 348 int err = 0; 349 350 if (rcu_access_pointer(vma->active.excl.fence)) { 351 struct dma_fence *fence; 352 353 rcu_read_lock(); 354 fence = dma_fence_get_rcu_safe(&vma->active.excl.fence); 355 rcu_read_unlock(); 356 if (fence) { 357 err = dma_fence_wait(fence, MAX_SCHEDULE_TIMEOUT); 358 dma_fence_put(fence); 359 } 360 } 361 362 return err; 363} 364 365/** 366 * i915_vma_bind - Sets up PTEs for an VMA in it's corresponding address space. 367 * @vma: VMA to map 368 * @cache_level: mapping cache level 369 * @flags: flags like global or local mapping 370 * @work: preallocated worker for allocating and binding the PTE 371 * 372 * DMA addresses are taken from the scatter-gather table of this object (or of 373 * this VMA in case of non-default GGTT views) and PTE entries set up. 374 * Note that DMA addresses are also the only part of the SG table we care about. 375 */ 376int i915_vma_bind(struct i915_vma *vma, 377 enum i915_cache_level cache_level, 378 u32 flags, 379 struct i915_vma_work *work) 380{ 381 u32 bind_flags; 382 u32 vma_flags; 383 384 GEM_BUG_ON(!drm_mm_node_allocated(&vma->node)); 385 GEM_BUG_ON(vma->size > vma->node.size); 386 387 if (GEM_DEBUG_WARN_ON(range_overflows(vma->node.start, 388 vma->node.size, 389 vma->vm->total))) 390 return -ENODEV; 391 392 if (GEM_DEBUG_WARN_ON(!flags)) 393 return -EINVAL; 394 395 bind_flags = flags; 396 bind_flags &= I915_VMA_GLOBAL_BIND | I915_VMA_LOCAL_BIND; 397 398 vma_flags = atomic_read(&vma->flags); 399 vma_flags &= I915_VMA_GLOBAL_BIND | I915_VMA_LOCAL_BIND; 400 401 bind_flags &= ~vma_flags; 402 if (bind_flags == 0) 403 return 0; 404 405 GEM_BUG_ON(!vma->pages); 406 407 trace_i915_vma_bind(vma, bind_flags); 408 if (work && bind_flags & vma->vm->bind_async_flags) { 409 struct dma_fence *prev; 410 411 work->vma = vma; 412 work->cache_level = cache_level; 413 work->flags = bind_flags; 414 415 /* 416 * Note we only want to chain up to the migration fence on 417 * the pages (not the object itself). As we don't track that, 418 * yet, we have to use the exclusive fence instead. 419 * 420 * Also note that we do not want to track the async vma as 421 * part of the obj->resv->excl_fence as it only affects 422 * execution and not content or object's backing store lifetime. 423 */ 424 prev = i915_active_set_exclusive(&vma->active, &work->base.dma); 425 if (prev) { 426 __i915_sw_fence_await_dma_fence(&work->base.chain, 427 prev, 428 &work->cb); 429 dma_fence_put(prev); 430 } 431 432 work->base.dma.error = 0; /* enable the queue_work() */ 433 434 if (vma->obj) { 435 __i915_gem_object_pin_pages(vma->obj); 436 work->pinned = i915_gem_object_get(vma->obj); 437 } 438 } else { 439 vma->ops->bind_vma(vma->vm, NULL, vma, cache_level, bind_flags); 440 } 441 442 if (vma->obj) 443 set_bit(I915_BO_WAS_BOUND_BIT, &vma->obj->flags); 444 445 atomic_or(bind_flags, &vma->flags); 446 return 0; 447} 448 449void __iomem *i915_vma_pin_iomap(struct i915_vma *vma) 450{ 451 void __iomem *ptr; 452 int err; 453 454 if (GEM_WARN_ON(!i915_vma_is_map_and_fenceable(vma))) { 455 err = -ENODEV; 456 goto err; 457 } 458 459 GEM_BUG_ON(!i915_vma_is_ggtt(vma)); 460 GEM_BUG_ON(!i915_vma_is_bound(vma, I915_VMA_GLOBAL_BIND)); 461 462 ptr = READ_ONCE(vma->iomap); 463 if (ptr == NULL) { 464 ptr = io_mapping_map_wc(&i915_vm_to_ggtt(vma->vm)->iomap, 465 vma->node.start, 466 vma->node.size); 467 if (ptr == NULL) { 468 err = -ENOMEM; 469 goto err; 470 } 471 472 if (unlikely(cmpxchg(&vma->iomap, NULL, ptr))) { 473 io_mapping_unmap(ptr); 474 ptr = vma->iomap; 475 } 476 } 477 478 __i915_vma_pin(vma); 479 480 err = i915_vma_pin_fence(vma); 481 if (err) 482 goto err_unpin; 483 484 i915_vma_set_ggtt_write(vma); 485 486 /* NB Access through the GTT requires the device to be awake. */ 487 return ptr; 488 489err_unpin: 490 __i915_vma_unpin(vma); 491err: 492 return IO_ERR_PTR(err); 493} 494 495void i915_vma_flush_writes(struct i915_vma *vma) 496{ 497 if (i915_vma_unset_ggtt_write(vma)) 498 intel_gt_flush_ggtt_writes(vma->vm->gt); 499} 500 501void i915_vma_unpin_iomap(struct i915_vma *vma) 502{ 503 GEM_BUG_ON(vma->iomap == NULL); 504 505 i915_vma_flush_writes(vma); 506 507 i915_vma_unpin_fence(vma); 508 i915_vma_unpin(vma); 509} 510 511void i915_vma_unpin_and_release(struct i915_vma **p_vma, unsigned int flags) 512{ 513 struct i915_vma *vma; 514 struct drm_i915_gem_object *obj; 515 516 vma = fetch_and_zero(p_vma); 517 if (!vma) 518 return; 519 520 obj = vma->obj; 521 GEM_BUG_ON(!obj); 522 523 i915_vma_unpin(vma); 524 525 if (flags & I915_VMA_RELEASE_MAP) 526 i915_gem_object_unpin_map(obj); 527 528 i915_gem_object_put(obj); 529} 530 531bool i915_vma_misplaced(const struct i915_vma *vma, 532 u64 size, u64 alignment, u64 flags) 533{ 534 if (!drm_mm_node_allocated(&vma->node)) 535 return false; 536 537 if (test_bit(I915_VMA_ERROR_BIT, __i915_vma_flags(vma))) 538 return true; 539 540 if (vma->node.size < size) 541 return true; 542 543 GEM_BUG_ON(alignment && !is_power_of_2(alignment)); 544 if (alignment && !IS_ALIGNED(vma->node.start, alignment)) 545 return true; 546 547 if (flags & PIN_MAPPABLE && !i915_vma_is_map_and_fenceable(vma)) 548 return true; 549 550 if (flags & PIN_OFFSET_BIAS && 551 vma->node.start < (flags & PIN_OFFSET_MASK)) 552 return true; 553 554 if (flags & PIN_OFFSET_FIXED && 555 vma->node.start != (flags & PIN_OFFSET_MASK)) 556 return true; 557 558 return false; 559} 560 561void __i915_vma_set_map_and_fenceable(struct i915_vma *vma) 562{ 563 bool mappable, fenceable; 564 565 GEM_BUG_ON(!i915_vma_is_ggtt(vma)); 566 GEM_BUG_ON(!vma->fence_size); 567 568 fenceable = (vma->node.size >= vma->fence_size && 569 IS_ALIGNED(vma->node.start, vma->fence_alignment)); 570 571 mappable = vma->node.start + vma->fence_size <= i915_vm_to_ggtt(vma->vm)->mappable_end; 572 573 if (mappable && fenceable) 574 set_bit(I915_VMA_CAN_FENCE_BIT, __i915_vma_flags(vma)); 575 else 576 clear_bit(I915_VMA_CAN_FENCE_BIT, __i915_vma_flags(vma)); 577} 578 579bool i915_gem_valid_gtt_space(struct i915_vma *vma, unsigned long color) 580{ 581 struct drm_mm_node *node = &vma->node; 582 struct drm_mm_node *other; 583 584 /* 585 * On some machines we have to be careful when putting differing types 586 * of snoopable memory together to avoid the prefetcher crossing memory 587 * domains and dying. During vm initialisation, we decide whether or not 588 * these constraints apply and set the drm_mm.color_adjust 589 * appropriately. 590 */ 591 if (!i915_vm_has_cache_coloring(vma->vm)) 592 return true; 593 594 /* Only valid to be called on an already inserted vma */ 595 GEM_BUG_ON(!drm_mm_node_allocated(node)); 596 GEM_BUG_ON(list_empty(&node->node_list)); 597 598 other = list_prev_entry(node, node_list); 599 if (i915_node_color_differs(other, color) && 600 !drm_mm_hole_follows(other)) 601 return false; 602 603 other = list_next_entry(node, node_list); 604 if (i915_node_color_differs(other, color) && 605 !drm_mm_hole_follows(node)) 606 return false; 607 608 return true; 609} 610 611/** 612 * i915_vma_insert - finds a slot for the vma in its address space 613 * @vma: the vma 614 * @size: requested size in bytes (can be larger than the VMA) 615 * @alignment: required alignment 616 * @flags: mask of PIN_* flags to use 617 * 618 * First we try to allocate some free space that meets the requirements for 619 * the VMA. Failiing that, if the flags permit, it will evict an old VMA, 620 * preferrably the oldest idle entry to make room for the new VMA. 621 * 622 * Returns: 623 * 0 on success, negative error code otherwise. 624 */ 625static int 626i915_vma_insert(struct i915_vma *vma, u64 size, u64 alignment, u64 flags) 627{ 628 unsigned long color; 629 u64 start, end; 630 int ret; 631 632 GEM_BUG_ON(i915_vma_is_bound(vma, I915_VMA_GLOBAL_BIND | I915_VMA_LOCAL_BIND)); 633 GEM_BUG_ON(drm_mm_node_allocated(&vma->node)); 634 635 size = max(size, vma->size); 636 alignment = max(alignment, vma->display_alignment); 637 if (flags & PIN_MAPPABLE) { 638 size = max_t(typeof(size), size, vma->fence_size); 639 alignment = max_t(typeof(alignment), 640 alignment, vma->fence_alignment); 641 } 642 643 GEM_BUG_ON(!IS_ALIGNED(size, I915_GTT_PAGE_SIZE)); 644 GEM_BUG_ON(!IS_ALIGNED(alignment, I915_GTT_MIN_ALIGNMENT)); 645 GEM_BUG_ON(!is_power_of_2(alignment)); 646 647 start = flags & PIN_OFFSET_BIAS ? flags & PIN_OFFSET_MASK : 0; 648 GEM_BUG_ON(!IS_ALIGNED(start, I915_GTT_PAGE_SIZE)); 649 650 end = vma->vm->total; 651 if (flags & PIN_MAPPABLE) 652 end = min_t(u64, end, i915_vm_to_ggtt(vma->vm)->mappable_end); 653 if (flags & PIN_ZONE_4G) 654 end = min_t(u64, end, (1ULL << 32) - I915_GTT_PAGE_SIZE); 655 GEM_BUG_ON(!IS_ALIGNED(end, I915_GTT_PAGE_SIZE)); 656 657 /* If binding the object/GGTT view requires more space than the entire 658 * aperture has, reject it early before evicting everything in a vain 659 * attempt to find space. 660 */ 661 if (size > end) { 662 DRM_DEBUG("Attempting to bind an object larger than the aperture: request=%llu > %s aperture=%llu\n", 663 size, flags & PIN_MAPPABLE ? "mappable" : "total", 664 end); 665 return -ENOSPC; 666 } 667 668 color = 0; 669 if (vma->obj && i915_vm_has_cache_coloring(vma->vm)) 670 color = vma->obj->cache_level; 671 672 if (flags & PIN_OFFSET_FIXED) { 673 u64 offset = flags & PIN_OFFSET_MASK; 674 if (!IS_ALIGNED(offset, alignment) || 675 range_overflows(offset, size, end)) 676 return -EINVAL; 677 678 ret = i915_gem_gtt_reserve(vma->vm, &vma->node, 679 size, offset, color, 680 flags); 681 if (ret) 682 return ret; 683 } else { 684 /* 685 * We only support huge gtt pages through the 48b PPGTT, 686 * however we also don't want to force any alignment for 687 * objects which need to be tightly packed into the low 32bits. 688 * 689 * Note that we assume that GGTT are limited to 4GiB for the 690 * forseeable future. See also i915_ggtt_offset(). 691 */ 692 if (upper_32_bits(end - 1) && 693 vma->page_sizes.sg > I915_GTT_PAGE_SIZE) { 694 /* 695 * We can't mix 64K and 4K PTEs in the same page-table 696 * (2M block), and so to avoid the ugliness and 697 * complexity of coloring we opt for just aligning 64K 698 * objects to 2M. 699 */ 700 u64 page_alignment = 701 rounddown_pow_of_two(vma->page_sizes.sg | 702 I915_GTT_PAGE_SIZE_2M); 703 704 /* 705 * Check we don't expand for the limited Global GTT 706 * (mappable aperture is even more precious!). This 707 * also checks that we exclude the aliasing-ppgtt. 708 */ 709 GEM_BUG_ON(i915_vma_is_ggtt(vma)); 710 711 alignment = max(alignment, page_alignment); 712 713 if (vma->page_sizes.sg & I915_GTT_PAGE_SIZE_64K) 714 size = round_up(size, I915_GTT_PAGE_SIZE_2M); 715 } 716 717 ret = i915_gem_gtt_insert(vma->vm, &vma->node, 718 size, alignment, color, 719 start, end, flags); 720 if (ret) 721 return ret; 722 723 GEM_BUG_ON(vma->node.start < start); 724 GEM_BUG_ON(vma->node.start + vma->node.size > end); 725 } 726 GEM_BUG_ON(!drm_mm_node_allocated(&vma->node)); 727 GEM_BUG_ON(!i915_gem_valid_gtt_space(vma, color)); 728 729 list_add_tail(&vma->vm_link, &vma->vm->bound_list); 730 731 return 0; 732} 733 734static void 735i915_vma_detach(struct i915_vma *vma) 736{ 737 GEM_BUG_ON(!drm_mm_node_allocated(&vma->node)); 738 GEM_BUG_ON(i915_vma_is_bound(vma, I915_VMA_GLOBAL_BIND | I915_VMA_LOCAL_BIND)); 739 740 /* 741 * And finally now the object is completely decoupled from this 742 * vma, we can drop its hold on the backing storage and allow 743 * it to be reaped by the shrinker. 744 */ 745 list_del(&vma->vm_link); 746} 747 748static bool try_qad_pin(struct i915_vma *vma, unsigned int flags) 749{ 750 unsigned int bound; 751 bool pinned = true; 752 753 bound = atomic_read(&vma->flags); 754 do { 755 if (unlikely(flags & ~bound)) 756 return false; 757 758 if (unlikely(bound & (I915_VMA_OVERFLOW | I915_VMA_ERROR))) 759 return false; 760 761 if (!(bound & I915_VMA_PIN_MASK)) 762 goto unpinned; 763 764 GEM_BUG_ON(((bound + 1) & I915_VMA_PIN_MASK) == 0); 765 } while (!atomic_try_cmpxchg(&vma->flags, &bound, bound + 1)); 766 767 return true; 768 769unpinned: 770 /* 771 * If pin_count==0, but we are bound, check under the lock to avoid 772 * racing with a concurrent i915_vma_unbind(). 773 */ 774 mutex_lock(&vma->vm->mutex); 775 do { 776 if (unlikely(bound & (I915_VMA_OVERFLOW | I915_VMA_ERROR))) { 777 pinned = false; 778 break; 779 } 780 781 if (unlikely(flags & ~bound)) { 782 pinned = false; 783 break; 784 } 785 } while (!atomic_try_cmpxchg(&vma->flags, &bound, bound + 1)); 786 mutex_unlock(&vma->vm->mutex); 787 788 return pinned; 789} 790 791static int vma_get_pages(struct i915_vma *vma) 792{ 793 int err = 0; 794 795 if (atomic_add_unless(&vma->pages_count, 1, 0)) 796 return 0; 797 798 /* Allocations ahoy! */ 799 if (mutex_lock_interruptible(&vma->pages_mutex)) 800 return -EINTR; 801 802 if (!atomic_read(&vma->pages_count)) { 803 if (vma->obj) { 804 err = i915_gem_object_pin_pages(vma->obj); 805 if (err) 806 goto unlock; 807 } 808 809 err = vma->ops->set_pages(vma); 810 if (err) { 811 if (vma->obj) 812 i915_gem_object_unpin_pages(vma->obj); 813 goto unlock; 814 } 815 } 816 atomic_inc(&vma->pages_count); 817 818unlock: 819 mutex_unlock(&vma->pages_mutex); 820 821 return err; 822} 823 824static void __vma_put_pages(struct i915_vma *vma, unsigned int count) 825{ 826 /* We allocate under vma_get_pages, so beware the shrinker */ 827 mutex_lock_nested(&vma->pages_mutex, SINGLE_DEPTH_NESTING); 828 GEM_BUG_ON(atomic_read(&vma->pages_count) < count); 829 if (atomic_sub_return(count, &vma->pages_count) == 0) { 830 vma->ops->clear_pages(vma); 831 GEM_BUG_ON(vma->pages); 832 if (vma->obj) 833 i915_gem_object_unpin_pages(vma->obj); 834 } 835 mutex_unlock(&vma->pages_mutex); 836} 837 838static void vma_put_pages(struct i915_vma *vma) 839{ 840 if (atomic_add_unless(&vma->pages_count, -1, 1)) 841 return; 842 843 __vma_put_pages(vma, 1); 844} 845 846static void vma_unbind_pages(struct i915_vma *vma) 847{ 848 unsigned int count; 849 850 lockdep_assert_held(&vma->vm->mutex); 851 852 /* The upper portion of pages_count is the number of bindings */ 853 count = atomic_read(&vma->pages_count); 854 count >>= I915_VMA_PAGES_BIAS; 855 GEM_BUG_ON(!count); 856 857 __vma_put_pages(vma, count | count << I915_VMA_PAGES_BIAS); 858} 859 860int i915_vma_pin_ww(struct i915_vma *vma, struct i915_gem_ww_ctx *ww, 861 u64 size, u64 alignment, u64 flags) 862{ 863 struct i915_vma_work *work = NULL; 864 intel_wakeref_t wakeref = 0; 865 unsigned int bound; 866 int err; 867 868#ifdef CONFIG_PROVE_LOCKING 869 if (debug_locks && lockdep_is_held(&vma->vm->i915->drm.struct_mutex)) 870 WARN_ON(!ww); 871#endif 872 873 BUILD_BUG_ON(PIN_GLOBAL != I915_VMA_GLOBAL_BIND); 874 BUILD_BUG_ON(PIN_USER != I915_VMA_LOCAL_BIND); 875 876 GEM_BUG_ON(!(flags & (PIN_USER | PIN_GLOBAL))); 877 878 /* First try and grab the pin without rebinding the vma */ 879 if (try_qad_pin(vma, flags & I915_VMA_BIND_MASK)) 880 return 0; 881 882 err = vma_get_pages(vma); 883 if (err) 884 return err; 885 886 if (flags & PIN_GLOBAL) 887 wakeref = intel_runtime_pm_get(&vma->vm->i915->runtime_pm); 888 889 if (flags & vma->vm->bind_async_flags) { 890 work = i915_vma_work(); 891 if (!work) { 892 err = -ENOMEM; 893 goto err_rpm; 894 } 895 896 work->vm = i915_vm_get(vma->vm); 897 898 /* Allocate enough page directories to used PTE */ 899 if (vma->vm->allocate_va_range) { 900 err = i915_vm_alloc_pt_stash(vma->vm, 901 &work->stash, 902 vma->size); 903 if (err) 904 goto err_fence; 905 906 err = i915_vm_pin_pt_stash(vma->vm, 907 &work->stash); 908 if (err) 909 goto err_fence; 910 } 911 } 912 913 /* 914 * Differentiate between user/kernel vma inside the aliasing-ppgtt. 915 * 916 * We conflate the Global GTT with the user's vma when using the 917 * aliasing-ppgtt, but it is still vitally important to try and 918 * keep the use cases distinct. For example, userptr objects are 919 * not allowed inside the Global GTT as that will cause lock 920 * inversions when we have to evict them the mmu_notifier callbacks - 921 * but they are allowed to be part of the user ppGTT which can never 922 * be mapped. As such we try to give the distinct users of the same 923 * mutex, distinct lockclasses [equivalent to how we keep i915_ggtt 924 * and i915_ppgtt separate]. 925 * 926 * NB this may cause us to mask real lock inversions -- while the 927 * code is safe today, lockdep may not be able to spot future 928 * transgressions. 929 */ 930 err = mutex_lock_interruptible_nested(&vma->vm->mutex, 931 !(flags & PIN_GLOBAL)); 932 if (err) 933 goto err_fence; 934 935 /* No more allocations allowed now we hold vm->mutex */ 936 937 if (unlikely(i915_vma_is_closed(vma))) { 938 err = -ENOENT; 939 goto err_unlock; 940 } 941 942 bound = atomic_read(&vma->flags); 943 if (unlikely(bound & I915_VMA_ERROR)) { 944 err = -ENOMEM; 945 goto err_unlock; 946 } 947 948 if (unlikely(!((bound + 1) & I915_VMA_PIN_MASK))) { 949 err = -EAGAIN; /* pins are meant to be fairly temporary */ 950 goto err_unlock; 951 } 952 953 if (unlikely(!(flags & ~bound & I915_VMA_BIND_MASK))) { 954 __i915_vma_pin(vma); 955 goto err_unlock; 956 } 957 958 err = i915_active_acquire(&vma->active); 959 if (err) 960 goto err_unlock; 961 962 if (!(bound & I915_VMA_BIND_MASK)) { 963 err = i915_vma_insert(vma, size, alignment, flags); 964 if (err) 965 goto err_active; 966 967 if (i915_is_ggtt(vma->vm)) 968 __i915_vma_set_map_and_fenceable(vma); 969 } 970 971 GEM_BUG_ON(!vma->pages); 972 err = i915_vma_bind(vma, 973 vma->obj ? vma->obj->cache_level : 0, 974 flags, work); 975 if (err) 976 goto err_remove; 977 978 /* There should only be at most 2 active bindings (user, global) */ 979 GEM_BUG_ON(bound + I915_VMA_PAGES_ACTIVE < bound); 980 atomic_add(I915_VMA_PAGES_ACTIVE, &vma->pages_count); 981 list_move_tail(&vma->vm_link, &vma->vm->bound_list); 982 983 __i915_vma_pin(vma); 984 GEM_BUG_ON(!i915_vma_is_pinned(vma)); 985 GEM_BUG_ON(!i915_vma_is_bound(vma, flags)); 986 GEM_BUG_ON(i915_vma_misplaced(vma, size, alignment, flags)); 987 988err_remove: 989 if (!i915_vma_is_bound(vma, I915_VMA_BIND_MASK)) { 990 i915_vma_detach(vma); 991 drm_mm_remove_node(&vma->node); 992 } 993err_active: 994 i915_active_release(&vma->active); 995err_unlock: 996 mutex_unlock(&vma->vm->mutex); 997err_fence: 998 if (work) 999 dma_fence_work_commit_imm(&work->base); 1000err_rpm: 1001 if (wakeref) 1002 intel_runtime_pm_put(&vma->vm->i915->runtime_pm, wakeref); 1003 vma_put_pages(vma); 1004 return err; 1005} 1006 1007static void flush_idle_contexts(struct intel_gt *gt) 1008{ 1009 struct intel_engine_cs *engine; 1010 enum intel_engine_id id; 1011 1012 for_each_engine(engine, gt, id) 1013 intel_engine_flush_barriers(engine); 1014 1015 intel_gt_wait_for_idle(gt, MAX_SCHEDULE_TIMEOUT); 1016} 1017 1018int i915_ggtt_pin(struct i915_vma *vma, struct i915_gem_ww_ctx *ww, 1019 u32 align, unsigned int flags) 1020{ 1021 struct i915_address_space *vm = vma->vm; 1022 int err; 1023 1024 GEM_BUG_ON(!i915_vma_is_ggtt(vma)); 1025 1026 do { 1027 err = i915_vma_pin_ww(vma, ww, 0, align, flags | PIN_GLOBAL); 1028 if (err != -ENOSPC) { 1029 if (!err) { 1030 err = i915_vma_wait_for_bind(vma); 1031 if (err) 1032 i915_vma_unpin(vma); 1033 } 1034 return err; 1035 } 1036 1037 /* Unlike i915_vma_pin, we don't take no for an answer! */ 1038 flush_idle_contexts(vm->gt); 1039 if (mutex_lock_interruptible(&vm->mutex) == 0) { 1040 i915_gem_evict_vm(vm); 1041 mutex_unlock(&vm->mutex); 1042 } 1043 } while (1); 1044} 1045 1046static void __vma_close(struct i915_vma *vma, struct intel_gt *gt) 1047{ 1048 /* 1049 * We defer actually closing, unbinding and destroying the VMA until 1050 * the next idle point, or if the object is freed in the meantime. By 1051 * postponing the unbind, we allow for it to be resurrected by the 1052 * client, avoiding the work required to rebind the VMA. This is 1053 * advantageous for DRI, where the client/server pass objects 1054 * between themselves, temporarily opening a local VMA to the 1055 * object, and then closing it again. The same object is then reused 1056 * on the next frame (or two, depending on the depth of the swap queue) 1057 * causing us to rebind the VMA once more. This ends up being a lot 1058 * of wasted work for the steady state. 1059 */ 1060 GEM_BUG_ON(i915_vma_is_closed(vma)); 1061 list_add(&vma->closed_link, >->closed_vma); 1062} 1063 1064void i915_vma_close(struct i915_vma *vma) 1065{ 1066 struct intel_gt *gt = vma->vm->gt; 1067 unsigned long flags; 1068 1069 if (i915_vma_is_ggtt(vma)) 1070 return; 1071 1072 GEM_BUG_ON(!atomic_read(&vma->open_count)); 1073 if (atomic_dec_and_lock_irqsave(&vma->open_count, 1074 >->closed_lock, 1075 flags)) { 1076 __vma_close(vma, gt); 1077 spin_unlock_irqrestore(>->closed_lock, flags); 1078 } 1079} 1080 1081static void __i915_vma_remove_closed(struct i915_vma *vma) 1082{ 1083 struct intel_gt *gt = vma->vm->gt; 1084 1085 spin_lock_irq(>->closed_lock); 1086 list_del_init(&vma->closed_link); 1087 spin_unlock_irq(>->closed_lock); 1088} 1089 1090void i915_vma_reopen(struct i915_vma *vma) 1091{ 1092 if (i915_vma_is_closed(vma)) 1093 __i915_vma_remove_closed(vma); 1094} 1095 1096void i915_vma_release(struct kref *ref) 1097{ 1098 struct i915_vma *vma = container_of(ref, typeof(*vma), ref); 1099 1100 if (drm_mm_node_allocated(&vma->node)) { 1101 mutex_lock(&vma->vm->mutex); 1102 atomic_and(~I915_VMA_PIN_MASK, &vma->flags); 1103 WARN_ON(__i915_vma_unbind(vma)); 1104 mutex_unlock(&vma->vm->mutex); 1105 GEM_BUG_ON(drm_mm_node_allocated(&vma->node)); 1106 } 1107 GEM_BUG_ON(i915_vma_is_active(vma)); 1108 1109 if (vma->obj) { 1110 struct drm_i915_gem_object *obj = vma->obj; 1111 1112 spin_lock(&obj->vma.lock); 1113 list_del(&vma->obj_link); 1114 if (!RB_EMPTY_NODE(&vma->obj_node)) 1115 rb_erase(&vma->obj_node, &obj->vma.tree); 1116 spin_unlock(&obj->vma.lock); 1117 } 1118 1119 __i915_vma_remove_closed(vma); 1120 i915_vm_put(vma->vm); 1121 1122 i915_active_fini(&vma->active); 1123 i915_vma_free(vma); 1124} 1125 1126void i915_vma_parked(struct intel_gt *gt) 1127{ 1128 struct i915_vma *vma, *next; 1129 LIST_HEAD(closed); 1130 1131 spin_lock_irq(>->closed_lock); 1132 list_for_each_entry_safe(vma, next, >->closed_vma, closed_link) { 1133 struct drm_i915_gem_object *obj = vma->obj; 1134 struct i915_address_space *vm = vma->vm; 1135 1136 /* XXX All to avoid keeping a reference on i915_vma itself */ 1137 1138 if (!kref_get_unless_zero(&obj->base.refcount)) 1139 continue; 1140 1141 if (!i915_vm_tryopen(vm)) { 1142 i915_gem_object_put(obj); 1143 continue; 1144 } 1145 1146 list_move(&vma->closed_link, &closed); 1147 } 1148 spin_unlock_irq(>->closed_lock); 1149 1150 /* As the GT is held idle, no vma can be reopened as we destroy them */ 1151 list_for_each_entry_safe(vma, next, &closed, closed_link) { 1152 struct drm_i915_gem_object *obj = vma->obj; 1153 struct i915_address_space *vm = vma->vm; 1154 1155 INIT_LIST_HEAD(&vma->closed_link); 1156 __i915_vma_put(vma); 1157 1158 i915_gem_object_put(obj); 1159 i915_vm_close(vm); 1160 } 1161} 1162 1163static void __i915_vma_iounmap(struct i915_vma *vma) 1164{ 1165 GEM_BUG_ON(i915_vma_is_pinned(vma)); 1166 1167 if (vma->iomap == NULL) 1168 return; 1169 1170 io_mapping_unmap(vma->iomap); 1171 vma->iomap = NULL; 1172} 1173 1174void i915_vma_revoke_mmap(struct i915_vma *vma) 1175{ 1176 struct drm_vma_offset_node *node; 1177 u64 vma_offset; 1178 1179 if (!i915_vma_has_userfault(vma)) 1180 return; 1181 1182 GEM_BUG_ON(!i915_vma_is_map_and_fenceable(vma)); 1183 GEM_BUG_ON(!vma->obj->userfault_count); 1184 1185 node = &vma->mmo->vma_node; 1186 vma_offset = vma->ggtt_view.partial.offset << PAGE_SHIFT; 1187 unmap_mapping_range(vma->vm->i915->drm.anon_inode->i_mapping, 1188 drm_vma_node_offset_addr(node) + vma_offset, 1189 vma->size, 1190 1); 1191 1192 i915_vma_unset_userfault(vma); 1193 if (!--vma->obj->userfault_count) 1194 list_del(&vma->obj->userfault_link); 1195} 1196 1197static int 1198__i915_request_await_bind(struct i915_request *rq, struct i915_vma *vma) 1199{ 1200 return __i915_request_await_exclusive(rq, &vma->active); 1201} 1202 1203int __i915_vma_move_to_active(struct i915_vma *vma, struct i915_request *rq) 1204{ 1205 int err; 1206 1207 GEM_BUG_ON(!i915_vma_is_pinned(vma)); 1208 1209 /* Wait for the vma to be bound before we start! */ 1210 err = __i915_request_await_bind(rq, vma); 1211 if (err) 1212 return err; 1213 1214 return i915_active_add_request(&vma->active, rq); 1215} 1216 1217int i915_vma_move_to_active(struct i915_vma *vma, 1218 struct i915_request *rq, 1219 unsigned int flags) 1220{ 1221 struct drm_i915_gem_object *obj = vma->obj; 1222 int err; 1223 1224 assert_object_held(obj); 1225 1226 err = __i915_vma_move_to_active(vma, rq); 1227 if (unlikely(err)) 1228 return err; 1229 1230 if (flags & EXEC_OBJECT_WRITE) { 1231 struct intel_frontbuffer *front; 1232 1233 front = __intel_frontbuffer_get(obj); 1234 if (unlikely(front)) { 1235 if (intel_frontbuffer_invalidate(front, ORIGIN_CS)) 1236 i915_active_add_request(&front->write, rq); 1237 intel_frontbuffer_put(front); 1238 } 1239 1240 dma_resv_add_excl_fence(vma->resv, &rq->fence); 1241 obj->write_domain = I915_GEM_DOMAIN_RENDER; 1242 obj->read_domains = 0; 1243 } else { 1244 err = dma_resv_reserve_shared(vma->resv, 1); 1245 if (unlikely(err)) 1246 return err; 1247 1248 dma_resv_add_shared_fence(vma->resv, &rq->fence); 1249 obj->write_domain = 0; 1250 } 1251 1252 if (flags & EXEC_OBJECT_NEEDS_FENCE && vma->fence) 1253 i915_active_add_request(&vma->fence->active, rq); 1254 1255 obj->read_domains |= I915_GEM_GPU_DOMAINS; 1256 obj->mm.dirty = true; 1257 1258 GEM_BUG_ON(!i915_vma_is_active(vma)); 1259 return 0; 1260} 1261 1262void __i915_vma_evict(struct i915_vma *vma) 1263{ 1264 GEM_BUG_ON(i915_vma_is_pinned(vma)); 1265 1266 if (i915_vma_is_map_and_fenceable(vma)) { 1267 /* Force a pagefault for domain tracking on next user access */ 1268 i915_vma_revoke_mmap(vma); 1269 1270 /* 1271 * Check that we have flushed all writes through the GGTT 1272 * before the unbind, other due to non-strict nature of those 1273 * indirect writes they may end up referencing the GGTT PTE 1274 * after the unbind. 1275 * 1276 * Note that we may be concurrently poking at the GGTT_WRITE 1277 * bit from set-domain, as we mark all GGTT vma associated 1278 * with an object. We know this is for another vma, as we 1279 * are currently unbinding this one -- so if this vma will be 1280 * reused, it will be refaulted and have its dirty bit set 1281 * before the next write. 1282 */ 1283 i915_vma_flush_writes(vma); 1284 1285 /* release the fence reg _after_ flushing */ 1286 i915_vma_revoke_fence(vma); 1287 1288 __i915_vma_iounmap(vma); 1289 clear_bit(I915_VMA_CAN_FENCE_BIT, __i915_vma_flags(vma)); 1290 } 1291 GEM_BUG_ON(vma->fence); 1292 GEM_BUG_ON(i915_vma_has_userfault(vma)); 1293 1294 if (likely(atomic_read(&vma->vm->open))) { 1295 trace_i915_vma_unbind(vma); 1296 vma->ops->unbind_vma(vma->vm, vma); 1297 } 1298 atomic_and(~(I915_VMA_BIND_MASK | I915_VMA_ERROR | I915_VMA_GGTT_WRITE), 1299 &vma->flags); 1300 1301 i915_vma_detach(vma); 1302 vma_unbind_pages(vma); 1303} 1304 1305int __i915_vma_unbind(struct i915_vma *vma) 1306{ 1307 int ret; 1308 1309 lockdep_assert_held(&vma->vm->mutex); 1310 1311 if (!drm_mm_node_allocated(&vma->node)) 1312 return 0; 1313 1314 if (i915_vma_is_pinned(vma)) { 1315 vma_print_allocator(vma, "is pinned"); 1316 return -EAGAIN; 1317 } 1318 1319 /* 1320 * After confirming that no one else is pinning this vma, wait for 1321 * any laggards who may have crept in during the wait (through 1322 * a residual pin skipping the vm->mutex) to complete. 1323 */ 1324 ret = i915_vma_sync(vma); 1325 if (ret) 1326 return ret; 1327 1328 GEM_BUG_ON(i915_vma_is_active(vma)); 1329 __i915_vma_evict(vma); 1330 1331 drm_mm_remove_node(&vma->node); /* pairs with i915_vma_release() */ 1332 return 0; 1333} 1334 1335int i915_vma_unbind(struct i915_vma *vma) 1336{ 1337 struct i915_address_space *vm = vma->vm; 1338 intel_wakeref_t wakeref = 0; 1339 int err; 1340 1341 /* Optimistic wait before taking the mutex */ 1342 err = i915_vma_sync(vma); 1343 if (err) 1344 return err; 1345 1346 if (!drm_mm_node_allocated(&vma->node)) 1347 return 0; 1348 1349 if (i915_vma_is_pinned(vma)) { 1350 vma_print_allocator(vma, "is pinned"); 1351 return -EAGAIN; 1352 } 1353 1354 if (i915_vma_is_bound(vma, I915_VMA_GLOBAL_BIND)) 1355 /* XXX not always required: nop_clear_range */ 1356 wakeref = intel_runtime_pm_get(&vm->i915->runtime_pm); 1357 1358 err = mutex_lock_interruptible_nested(&vma->vm->mutex, !wakeref); 1359 if (err) 1360 goto out_rpm; 1361 1362 err = __i915_vma_unbind(vma); 1363 mutex_unlock(&vm->mutex); 1364 1365out_rpm: 1366 if (wakeref) 1367 intel_runtime_pm_put(&vm->i915->runtime_pm, wakeref); 1368 return err; 1369} 1370 1371struct i915_vma *i915_vma_make_unshrinkable(struct i915_vma *vma) 1372{ 1373 i915_gem_object_make_unshrinkable(vma->obj); 1374 return vma; 1375} 1376 1377void i915_vma_make_shrinkable(struct i915_vma *vma) 1378{ 1379 i915_gem_object_make_shrinkable(vma->obj); 1380} 1381 1382void i915_vma_make_purgeable(struct i915_vma *vma) 1383{ 1384 i915_gem_object_make_purgeable(vma->obj); 1385} 1386 1387#if IS_ENABLED(CONFIG_DRM_I915_SELFTEST) 1388#include "selftests/i915_vma.c" 1389#endif 1390 1391static void i915_global_vma_shrink(void) 1392{ 1393 kmem_cache_shrink(global.slab_vmas); 1394} 1395 1396static void i915_global_vma_exit(void) 1397{ 1398 kmem_cache_destroy(global.slab_vmas); 1399} 1400 1401static struct i915_global_vma global = { { 1402 .shrink = i915_global_vma_shrink, 1403 .exit = i915_global_vma_exit, 1404} }; 1405 1406int __init i915_global_vma_init(void) 1407{ 1408 global.slab_vmas = KMEM_CACHE(i915_vma, SLAB_HWCACHE_ALIGN); 1409 if (!global.slab_vmas) 1410 return -ENOMEM; 1411 1412 i915_global_register(&global.base); 1413 return 0; 1414} 1415