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1/*2 * Copyright © 2016 Intel Corporation3 *4 * Permission is hereby granted, free of charge, to any person obtaining a5 * copy of this software and associated documentation files (the "Software"),6 * to deal in the Software without restriction, including without limitation7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,8 * and/or sell copies of the Software, and to permit persons to whom the9 * Software is furnished to do so, subject to the following conditions:10 *11 * The above copyright notice and this permission notice (including the next12 * paragraph) shall be included in all copies or substantial portions of the13 * Software.14 *15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS21 * IN THE SOFTWARE.22 *23 */24 25#include <linux/sched/mm.h>26#include <linux/dma-fence-array.h>27#include <drm/drm_gem.h>28 29#include "display/intel_display.h"30#include "display/intel_frontbuffer.h"31#include "gem/i915_gem_lmem.h"32#include "gem/i915_gem_object_frontbuffer.h"33#include "gem/i915_gem_tiling.h"34#include "gt/intel_engine.h"35#include "gt/intel_engine_heartbeat.h"36#include "gt/intel_gt.h"37#include "gt/intel_gt_pm.h"38#include "gt/intel_gt_requests.h"39#include "gt/intel_tlb.h"40 41#include "i915_drv.h"42#include "i915_gem_evict.h"43#include "i915_sw_fence_work.h"44#include "i915_trace.h"45#include "i915_vma.h"46#include "i915_vma_resource.h"47 48static inline void assert_vma_held_evict(const struct i915_vma *vma)49{50 /*51 * We may be forced to unbind when the vm is dead, to clean it up.52 * This is the only exception to the requirement of the object lock53 * being held.54 */55 if (kref_read(&vma->vm->ref))56 assert_object_held_shared(vma->obj);57}58 59static struct kmem_cache *slab_vmas;60 61static struct i915_vma *i915_vma_alloc(void)62{63 return kmem_cache_zalloc(slab_vmas, GFP_KERNEL);64}65 66static void i915_vma_free(struct i915_vma *vma)67{68 return kmem_cache_free(slab_vmas, vma);69}70 71#if IS_ENABLED(CONFIG_DRM_I915_ERRLOG_GEM) && IS_ENABLED(CONFIG_DRM_DEBUG_MM)72 73#include <linux/stackdepot.h>74 75static void vma_print_allocator(struct i915_vma *vma, const char *reason)76{77 char buf[512];78 79 if (!vma->node.stack) {80 drm_dbg(vma->obj->base.dev,81 "vma.node [%08llx + %08llx] %s: unknown owner\n",82 vma->node.start, vma->node.size, reason);83 return;84 }85 86 stack_depot_snprint(vma->node.stack, buf, sizeof(buf), 0);87 drm_dbg(vma->obj->base.dev,88 "vma.node [%08llx + %08llx] %s: inserted at %s\n",89 vma->node.start, vma->node.size, reason, buf);90}91 92#else93 94static void vma_print_allocator(struct i915_vma *vma, const char *reason)95{96}97 98#endif99 100static inline struct i915_vma *active_to_vma(struct i915_active *ref)101{102 return container_of(ref, typeof(struct i915_vma), active);103}104 105static int __i915_vma_active(struct i915_active *ref)106{107 struct i915_vma *vma = active_to_vma(ref);108 109 if (!i915_vma_tryget(vma))110 return -ENOENT;111 112 /*113 * Exclude global GTT VMA from holding a GT wakeref114 * while active, otherwise GPU never goes idle.115 */116 if (!i915_vma_is_ggtt(vma)) {117 /*118 * Since we and our _retire() counterpart can be119 * called asynchronously, storing a wakeref tracking120 * handle inside struct i915_vma is not safe, and121 * there is no other good place for that. Hence,122 * use untracked variants of intel_gt_pm_get/put().123 */124 intel_gt_pm_get_untracked(vma->vm->gt);125 }126 127 return 0;128}129 130static void __i915_vma_retire(struct i915_active *ref)131{132 struct i915_vma *vma = active_to_vma(ref);133 134 if (!i915_vma_is_ggtt(vma)) {135 /*136 * Since we can be called from atomic contexts,137 * use an async variant of intel_gt_pm_put().138 */139 intel_gt_pm_put_async_untracked(vma->vm->gt);140 }141 142 i915_vma_put(vma);143}144 145static struct i915_vma *146vma_create(struct drm_i915_gem_object *obj,147 struct i915_address_space *vm,148 const struct i915_gtt_view *view)149{150 struct i915_vma *pos = ERR_PTR(-E2BIG);151 struct i915_vma *vma;152 struct rb_node *rb, **p;153 int err;154 155 /* The aliasing_ppgtt should never be used directly! */156 GEM_BUG_ON(vm == &vm->gt->ggtt->alias->vm);157 158 vma = i915_vma_alloc();159 if (vma == NULL)160 return ERR_PTR(-ENOMEM);161 162 vma->ops = &vm->vma_ops;163 vma->obj = obj;164 vma->size = obj->base.size;165 vma->display_alignment = I915_GTT_MIN_ALIGNMENT;166 167 i915_active_init(&vma->active, __i915_vma_active, __i915_vma_retire, 0);168 169 /* Declare ourselves safe for use inside shrinkers */170 if (IS_ENABLED(CONFIG_LOCKDEP)) {171 fs_reclaim_acquire(GFP_KERNEL);172 might_lock(&vma->active.mutex);173 fs_reclaim_release(GFP_KERNEL);174 }175 176 INIT_LIST_HEAD(&vma->closed_link);177 INIT_LIST_HEAD(&vma->obj_link);178 RB_CLEAR_NODE(&vma->obj_node);179 180 if (view && view->type != I915_GTT_VIEW_NORMAL) {181 vma->gtt_view = *view;182 if (view->type == I915_GTT_VIEW_PARTIAL) {183 GEM_BUG_ON(range_overflows_t(u64,184 view->partial.offset,185 view->partial.size,186 obj->base.size >> PAGE_SHIFT));187 vma->size = view->partial.size;188 vma->size <<= PAGE_SHIFT;189 GEM_BUG_ON(vma->size > obj->base.size);190 } else if (view->type == I915_GTT_VIEW_ROTATED) {191 vma->size = intel_rotation_info_size(&view->rotated);192 vma->size <<= PAGE_SHIFT;193 } else if (view->type == I915_GTT_VIEW_REMAPPED) {194 vma->size = intel_remapped_info_size(&view->remapped);195 vma->size <<= PAGE_SHIFT;196 }197 }198 199 if (unlikely(vma->size > vm->total))200 goto err_vma;201 202 GEM_BUG_ON(!IS_ALIGNED(vma->size, I915_GTT_PAGE_SIZE));203 204 err = mutex_lock_interruptible(&vm->mutex);205 if (err) {206 pos = ERR_PTR(err);207 goto err_vma;208 }209 210 vma->vm = vm;211 list_add_tail(&vma->vm_link, &vm->unbound_list);212 213 spin_lock(&obj->vma.lock);214 if (i915_is_ggtt(vm)) {215 if (unlikely(overflows_type(vma->size, u32)))216 goto err_unlock;217 218 vma->fence_size = i915_gem_fence_size(vm->i915, vma->size,219 i915_gem_object_get_tiling(obj),220 i915_gem_object_get_stride(obj));221 if (unlikely(vma->fence_size < vma->size || /* overflow */222 vma->fence_size > vm->total))223 goto err_unlock;224 225 GEM_BUG_ON(!IS_ALIGNED(vma->fence_size, I915_GTT_MIN_ALIGNMENT));226 227 vma->fence_alignment = i915_gem_fence_alignment(vm->i915, vma->size,228 i915_gem_object_get_tiling(obj),229 i915_gem_object_get_stride(obj));230 GEM_BUG_ON(!is_power_of_2(vma->fence_alignment));231 232 __set_bit(I915_VMA_GGTT_BIT, __i915_vma_flags(vma));233 }234 235 rb = NULL;236 p = &obj->vma.tree.rb_node;237 while (*p) {238 long cmp;239 240 rb = *p;241 pos = rb_entry(rb, struct i915_vma, obj_node);242 243 /*244 * If the view already exists in the tree, another thread245 * already created a matching vma, so return the older instance246 * and dispose of ours.247 */248 cmp = i915_vma_compare(pos, vm, view);249 if (cmp < 0)250 p = &rb->rb_right;251 else if (cmp > 0)252 p = &rb->rb_left;253 else254 goto err_unlock;255 }256 rb_link_node(&vma->obj_node, rb, p);257 rb_insert_color(&vma->obj_node, &obj->vma.tree);258 259 if (i915_vma_is_ggtt(vma))260 /*261 * We put the GGTT vma at the start of the vma-list, followed262 * by the ppGGTT vma. This allows us to break early when263 * iterating over only the GGTT vma for an object, see264 * for_each_ggtt_vma()265 */266 list_add(&vma->obj_link, &obj->vma.list);267 else268 list_add_tail(&vma->obj_link, &obj->vma.list);269 270 spin_unlock(&obj->vma.lock);271 mutex_unlock(&vm->mutex);272 273 return vma;274 275err_unlock:276 spin_unlock(&obj->vma.lock);277 list_del_init(&vma->vm_link);278 mutex_unlock(&vm->mutex);279err_vma:280 i915_vma_free(vma);281 return pos;282}283 284static struct i915_vma *285i915_vma_lookup(struct drm_i915_gem_object *obj,286 struct i915_address_space *vm,287 const struct i915_gtt_view *view)288{289 struct rb_node *rb;290 291 rb = obj->vma.tree.rb_node;292 while (rb) {293 struct i915_vma *vma = rb_entry(rb, struct i915_vma, obj_node);294 long cmp;295 296 cmp = i915_vma_compare(vma, vm, view);297 if (cmp == 0)298 return vma;299 300 if (cmp < 0)301 rb = rb->rb_right;302 else303 rb = rb->rb_left;304 }305 306 return NULL;307}308 309/**310 * i915_vma_instance - return the singleton instance of the VMA311 * @obj: parent &struct drm_i915_gem_object to be mapped312 * @vm: address space in which the mapping is located313 * @view: additional mapping requirements314 *315 * i915_vma_instance() looks up an existing VMA of the @obj in the @vm with316 * the same @view characteristics. If a match is not found, one is created.317 * Once created, the VMA is kept until either the object is freed, or the318 * address space is closed.319 *320 * Returns the vma, or an error pointer.321 */322struct i915_vma *323i915_vma_instance(struct drm_i915_gem_object *obj,324 struct i915_address_space *vm,325 const struct i915_gtt_view *view)326{327 struct i915_vma *vma;328 329 GEM_BUG_ON(view && !i915_is_ggtt_or_dpt(vm));330 GEM_BUG_ON(!kref_read(&vm->ref));331 332 spin_lock(&obj->vma.lock);333 vma = i915_vma_lookup(obj, vm, view);334 spin_unlock(&obj->vma.lock);335 336 /* vma_create() will resolve the race if another creates the vma */337 if (unlikely(!vma))338 vma = vma_create(obj, vm, view);339 340 GEM_BUG_ON(!IS_ERR(vma) && i915_vma_compare(vma, vm, view));341 return vma;342}343 344struct i915_vma_work {345 struct dma_fence_work base;346 struct i915_address_space *vm;347 struct i915_vm_pt_stash stash;348 struct i915_vma_resource *vma_res;349 struct drm_i915_gem_object *obj;350 struct i915_sw_dma_fence_cb cb;351 unsigned int pat_index;352 unsigned int flags;353};354 355static void __vma_bind(struct dma_fence_work *work)356{357 struct i915_vma_work *vw = container_of(work, typeof(*vw), base);358 struct i915_vma_resource *vma_res = vw->vma_res;359 360 /*361 * We are about the bind the object, which must mean we have already362 * signaled the work to potentially clear/move the pages underneath. If363 * something went wrong at that stage then the object should have364 * unknown_state set, in which case we need to skip the bind.365 */366 if (i915_gem_object_has_unknown_state(vw->obj))367 return;368 369 vma_res->ops->bind_vma(vma_res->vm, &vw->stash,370 vma_res, vw->pat_index, vw->flags);371}372 373static void __vma_release(struct dma_fence_work *work)374{375 struct i915_vma_work *vw = container_of(work, typeof(*vw), base);376 377 if (vw->obj)378 i915_gem_object_put(vw->obj);379 380 i915_vm_free_pt_stash(vw->vm, &vw->stash);381 if (vw->vma_res)382 i915_vma_resource_put(vw->vma_res);383}384 385static const struct dma_fence_work_ops bind_ops = {386 .name = "bind",387 .work = __vma_bind,388 .release = __vma_release,389};390 391struct i915_vma_work *i915_vma_work(void)392{393 struct i915_vma_work *vw;394 395 vw = kzalloc(sizeof(*vw), GFP_KERNEL);396 if (!vw)397 return NULL;398 399 dma_fence_work_init(&vw->base, &bind_ops);400 vw->base.dma.error = -EAGAIN; /* disable the worker by default */401 402 return vw;403}404 405int i915_vma_wait_for_bind(struct i915_vma *vma)406{407 int err = 0;408 409 if (rcu_access_pointer(vma->active.excl.fence)) {410 struct dma_fence *fence;411 412 rcu_read_lock();413 fence = dma_fence_get_rcu_safe(&vma->active.excl.fence);414 rcu_read_unlock();415 if (fence) {416 err = dma_fence_wait(fence, true);417 dma_fence_put(fence);418 }419 }420 421 return err;422}423 424#if IS_ENABLED(CONFIG_DRM_I915_DEBUG_GEM)425static int i915_vma_verify_bind_complete(struct i915_vma *vma)426{427 struct dma_fence *fence = i915_active_fence_get(&vma->active.excl);428 int err;429 430 if (!fence)431 return 0;432 433 if (dma_fence_is_signaled(fence))434 err = fence->error;435 else436 err = -EBUSY;437 438 dma_fence_put(fence);439 440 return err;441}442#else443#define i915_vma_verify_bind_complete(_vma) 0444#endif445 446I915_SELFTEST_EXPORT void447i915_vma_resource_init_from_vma(struct i915_vma_resource *vma_res,448 struct i915_vma *vma)449{450 struct drm_i915_gem_object *obj = vma->obj;451 452 i915_vma_resource_init(vma_res, vma->vm, vma->pages, &vma->page_sizes,453 obj->mm.rsgt, i915_gem_object_is_readonly(obj),454 i915_gem_object_is_lmem(obj), obj->mm.region,455 vma->ops, vma->private, __i915_vma_offset(vma),456 __i915_vma_size(vma), vma->size, vma->guard);457}458 459/**460 * i915_vma_bind - Sets up PTEs for an VMA in it's corresponding address space.461 * @vma: VMA to map462 * @pat_index: PAT index to set in PTE463 * @flags: flags like global or local mapping464 * @work: preallocated worker for allocating and binding the PTE465 * @vma_res: pointer to a preallocated vma resource. The resource is either466 * consumed or freed.467 *468 * DMA addresses are taken from the scatter-gather table of this object (or of469 * this VMA in case of non-default GGTT views) and PTE entries set up.470 * Note that DMA addresses are also the only part of the SG table we care about.471 */472int i915_vma_bind(struct i915_vma *vma,473 unsigned int pat_index,474 u32 flags,475 struct i915_vma_work *work,476 struct i915_vma_resource *vma_res)477{478 u32 bind_flags;479 u32 vma_flags;480 int ret;481 482 lockdep_assert_held(&vma->vm->mutex);483 GEM_BUG_ON(!drm_mm_node_allocated(&vma->node));484 GEM_BUG_ON(vma->size > i915_vma_size(vma));485 486 if (GEM_DEBUG_WARN_ON(range_overflows(vma->node.start,487 vma->node.size,488 vma->vm->total))) {489 i915_vma_resource_free(vma_res);490 return -ENODEV;491 }492 493 if (GEM_DEBUG_WARN_ON(!flags)) {494 i915_vma_resource_free(vma_res);495 return -EINVAL;496 }497 498 bind_flags = flags;499 bind_flags &= I915_VMA_GLOBAL_BIND | I915_VMA_LOCAL_BIND;500 501 vma_flags = atomic_read(&vma->flags);502 vma_flags &= I915_VMA_GLOBAL_BIND | I915_VMA_LOCAL_BIND;503 504 bind_flags &= ~vma_flags;505 if (bind_flags == 0) {506 i915_vma_resource_free(vma_res);507 return 0;508 }509 510 GEM_BUG_ON(!atomic_read(&vma->pages_count));511 512 /* Wait for or await async unbinds touching our range */513 if (work && bind_flags & vma->vm->bind_async_flags)514 ret = i915_vma_resource_bind_dep_await(vma->vm,515 &work->base.chain,516 vma->node.start,517 vma->node.size,518 true,519 GFP_NOWAIT |520 __GFP_RETRY_MAYFAIL |521 __GFP_NOWARN);522 else523 ret = i915_vma_resource_bind_dep_sync(vma->vm, vma->node.start,524 vma->node.size, true);525 if (ret) {526 i915_vma_resource_free(vma_res);527 return ret;528 }529 530 if (vma->resource || !vma_res) {531 /* Rebinding with an additional I915_VMA_*_BIND */532 GEM_WARN_ON(!vma_flags);533 i915_vma_resource_free(vma_res);534 } else {535 i915_vma_resource_init_from_vma(vma_res, vma);536 vma->resource = vma_res;537 }538 trace_i915_vma_bind(vma, bind_flags);539 if (work && bind_flags & vma->vm->bind_async_flags) {540 struct dma_fence *prev;541 542 work->vma_res = i915_vma_resource_get(vma->resource);543 work->pat_index = pat_index;544 work->flags = bind_flags;545 546 /*547 * Note we only want to chain up to the migration fence on548 * the pages (not the object itself). As we don't track that,549 * yet, we have to use the exclusive fence instead.550 *551 * Also note that we do not want to track the async vma as552 * part of the obj->resv->excl_fence as it only affects553 * execution and not content or object's backing store lifetime.554 */555 prev = i915_active_set_exclusive(&vma->active, &work->base.dma);556 if (prev) {557 __i915_sw_fence_await_dma_fence(&work->base.chain,558 prev,559 &work->cb);560 dma_fence_put(prev);561 }562 563 work->base.dma.error = 0; /* enable the queue_work() */564 work->obj = i915_gem_object_get(vma->obj);565 } else {566 ret = i915_gem_object_wait_moving_fence(vma->obj, true);567 if (ret) {568 i915_vma_resource_free(vma->resource);569 vma->resource = NULL;570 571 return ret;572 }573 vma->ops->bind_vma(vma->vm, NULL, vma->resource, pat_index,574 bind_flags);575 }576 577 atomic_or(bind_flags, &vma->flags);578 return 0;579}580 581void __iomem *i915_vma_pin_iomap(struct i915_vma *vma)582{583 void __iomem *ptr;584 int err;585 586 if (WARN_ON_ONCE(vma->obj->flags & I915_BO_ALLOC_GPU_ONLY))587 return IOMEM_ERR_PTR(-EINVAL);588 589 GEM_BUG_ON(!i915_vma_is_ggtt(vma));590 GEM_BUG_ON(!i915_vma_is_bound(vma, I915_VMA_GLOBAL_BIND));591 GEM_BUG_ON(i915_vma_verify_bind_complete(vma));592 593 ptr = READ_ONCE(vma->iomap);594 if (ptr == NULL) {595 /*596 * TODO: consider just using i915_gem_object_pin_map() for lmem597 * instead, which already supports mapping non-contiguous chunks598 * of pages, that way we can also drop the599 * I915_BO_ALLOC_CONTIGUOUS when allocating the object.600 */601 if (i915_gem_object_is_lmem(vma->obj)) {602 ptr = i915_gem_object_lmem_io_map(vma->obj, 0,603 vma->obj->base.size);604 } else if (i915_vma_is_map_and_fenceable(vma)) {605 ptr = io_mapping_map_wc(&i915_vm_to_ggtt(vma->vm)->iomap,606 i915_vma_offset(vma),607 i915_vma_size(vma));608 } else {609 ptr = (void __iomem *)610 i915_gem_object_pin_map(vma->obj, I915_MAP_WC);611 if (IS_ERR(ptr)) {612 err = PTR_ERR(ptr);613 goto err;614 }615 ptr = page_pack_bits(ptr, 1);616 }617 618 if (ptr == NULL) {619 err = -ENOMEM;620 goto err;621 }622 623 if (unlikely(cmpxchg(&vma->iomap, NULL, ptr))) {624 if (page_unmask_bits(ptr))625 __i915_gem_object_release_map(vma->obj);626 else627 io_mapping_unmap(ptr);628 ptr = vma->iomap;629 }630 }631 632 __i915_vma_pin(vma);633 634 err = i915_vma_pin_fence(vma);635 if (err)636 goto err_unpin;637 638 i915_vma_set_ggtt_write(vma);639 640 /* NB Access through the GTT requires the device to be awake. */641 return page_mask_bits(ptr);642 643err_unpin:644 __i915_vma_unpin(vma);645err:646 return IOMEM_ERR_PTR(err);647}648 649void i915_vma_flush_writes(struct i915_vma *vma)650{651 if (i915_vma_unset_ggtt_write(vma))652 intel_gt_flush_ggtt_writes(vma->vm->gt);653}654 655void i915_vma_unpin_iomap(struct i915_vma *vma)656{657 GEM_BUG_ON(vma->iomap == NULL);658 659 /* XXX We keep the mapping until __i915_vma_unbind()/evict() */660 661 i915_vma_flush_writes(vma);662 663 i915_vma_unpin_fence(vma);664 i915_vma_unpin(vma);665}666 667void i915_vma_unpin_and_release(struct i915_vma **p_vma, unsigned int flags)668{669 struct i915_vma *vma;670 struct drm_i915_gem_object *obj;671 672 vma = fetch_and_zero(p_vma);673 if (!vma)674 return;675 676 obj = vma->obj;677 GEM_BUG_ON(!obj);678 679 i915_vma_unpin(vma);680 681 if (flags & I915_VMA_RELEASE_MAP)682 i915_gem_object_unpin_map(obj);683 684 i915_gem_object_put(obj);685}686 687bool i915_vma_misplaced(const struct i915_vma *vma,688 u64 size, u64 alignment, u64 flags)689{690 if (!drm_mm_node_allocated(&vma->node))691 return false;692 693 if (test_bit(I915_VMA_ERROR_BIT, __i915_vma_flags(vma)))694 return true;695 696 if (i915_vma_size(vma) < size)697 return true;698 699 GEM_BUG_ON(alignment && !is_power_of_2(alignment));700 if (alignment && !IS_ALIGNED(i915_vma_offset(vma), alignment))701 return true;702 703 if (flags & PIN_MAPPABLE && !i915_vma_is_map_and_fenceable(vma))704 return true;705 706 if (flags & PIN_OFFSET_BIAS &&707 i915_vma_offset(vma) < (flags & PIN_OFFSET_MASK))708 return true;709 710 if (flags & PIN_OFFSET_FIXED &&711 i915_vma_offset(vma) != (flags & PIN_OFFSET_MASK))712 return true;713 714 if (flags & PIN_OFFSET_GUARD &&715 vma->guard < (flags & PIN_OFFSET_MASK))716 return true;717 718 return false;719}720 721void __i915_vma_set_map_and_fenceable(struct i915_vma *vma)722{723 bool mappable, fenceable;724 725 GEM_BUG_ON(!i915_vma_is_ggtt(vma));726 GEM_BUG_ON(!vma->fence_size);727 728 fenceable = (i915_vma_size(vma) >= vma->fence_size &&729 IS_ALIGNED(i915_vma_offset(vma), vma->fence_alignment));730 731 mappable = i915_ggtt_offset(vma) + vma->fence_size <=732 i915_vm_to_ggtt(vma->vm)->mappable_end;733 734 if (mappable && fenceable)735 set_bit(I915_VMA_CAN_FENCE_BIT, __i915_vma_flags(vma));736 else737 clear_bit(I915_VMA_CAN_FENCE_BIT, __i915_vma_flags(vma));738}739 740bool i915_gem_valid_gtt_space(struct i915_vma *vma, unsigned long color)741{742 struct drm_mm_node *node = &vma->node;743 struct drm_mm_node *other;744 745 /*746 * On some machines we have to be careful when putting differing types747 * of snoopable memory together to avoid the prefetcher crossing memory748 * domains and dying. During vm initialisation, we decide whether or not749 * these constraints apply and set the drm_mm.color_adjust750 * appropriately.751 */752 if (!i915_vm_has_cache_coloring(vma->vm))753 return true;754 755 /* Only valid to be called on an already inserted vma */756 GEM_BUG_ON(!drm_mm_node_allocated(node));757 GEM_BUG_ON(list_empty(&node->node_list));758 759 other = list_prev_entry(node, node_list);760 if (i915_node_color_differs(other, color) &&761 !drm_mm_hole_follows(other))762 return false;763 764 other = list_next_entry(node, node_list);765 if (i915_node_color_differs(other, color) &&766 !drm_mm_hole_follows(node))767 return false;768 769 return true;770}771 772/**773 * i915_vma_insert - finds a slot for the vma in its address space774 * @vma: the vma775 * @ww: An optional struct i915_gem_ww_ctx776 * @size: requested size in bytes (can be larger than the VMA)777 * @alignment: required alignment778 * @flags: mask of PIN_* flags to use779 *780 * First we try to allocate some free space that meets the requirements for781 * the VMA. Failiing that, if the flags permit, it will evict an old VMA,782 * preferrably the oldest idle entry to make room for the new VMA.783 *784 * Returns:785 * 0 on success, negative error code otherwise.786 */787static int788i915_vma_insert(struct i915_vma *vma, struct i915_gem_ww_ctx *ww,789 u64 size, u64 alignment, u64 flags)790{791 unsigned long color, guard;792 u64 start, end;793 int ret;794 795 GEM_BUG_ON(i915_vma_is_bound(vma, I915_VMA_GLOBAL_BIND | I915_VMA_LOCAL_BIND));796 GEM_BUG_ON(drm_mm_node_allocated(&vma->node));797 GEM_BUG_ON(hweight64(flags & (PIN_OFFSET_GUARD | PIN_OFFSET_FIXED | PIN_OFFSET_BIAS)) > 1);798 799 size = max(size, vma->size);800 alignment = max_t(typeof(alignment), alignment, vma->display_alignment);801 if (flags & PIN_MAPPABLE) {802 size = max_t(typeof(size), size, vma->fence_size);803 alignment = max_t(typeof(alignment),804 alignment, vma->fence_alignment);805 }806 807 GEM_BUG_ON(!IS_ALIGNED(size, I915_GTT_PAGE_SIZE));808 GEM_BUG_ON(!IS_ALIGNED(alignment, I915_GTT_MIN_ALIGNMENT));809 GEM_BUG_ON(!is_power_of_2(alignment));810 811 guard = vma->guard; /* retain guard across rebinds */812 if (flags & PIN_OFFSET_GUARD) {813 GEM_BUG_ON(overflows_type(flags & PIN_OFFSET_MASK, u32));814 guard = max_t(u32, guard, flags & PIN_OFFSET_MASK);815 }816 /*817 * As we align the node upon insertion, but the hardware gets818 * node.start + guard, the easiest way to make that work is819 * to make the guard a multiple of the alignment size.820 */821 guard = ALIGN(guard, alignment);822 823 start = flags & PIN_OFFSET_BIAS ? flags & PIN_OFFSET_MASK : 0;824 GEM_BUG_ON(!IS_ALIGNED(start, I915_GTT_PAGE_SIZE));825 826 end = vma->vm->total;827 if (flags & PIN_MAPPABLE)828 end = min_t(u64, end, i915_vm_to_ggtt(vma->vm)->mappable_end);829 if (flags & PIN_ZONE_4G)830 end = min_t(u64, end, (1ULL << 32) - I915_GTT_PAGE_SIZE);831 GEM_BUG_ON(!IS_ALIGNED(end, I915_GTT_PAGE_SIZE));832 833 alignment = max(alignment, i915_vm_obj_min_alignment(vma->vm, vma->obj));834 835 /*836 * If binding the object/GGTT view requires more space than the entire837 * aperture has, reject it early before evicting everything in a vain838 * attempt to find space.839 */840 if (size > end - 2 * guard) {841 drm_dbg(vma->obj->base.dev,842 "Attempting to bind an object larger than the aperture: request=%llu > %s aperture=%llu\n",843 size, flags & PIN_MAPPABLE ? "mappable" : "total", end);844 return -ENOSPC;845 }846 847 color = 0;848 849 if (i915_vm_has_cache_coloring(vma->vm))850 color = vma->obj->pat_index;851 852 if (flags & PIN_OFFSET_FIXED) {853 u64 offset = flags & PIN_OFFSET_MASK;854 if (!IS_ALIGNED(offset, alignment) ||855 range_overflows(offset, size, end))856 return -EINVAL;857 /*858 * The caller knows not of the guard added by others and859 * requests for the offset of the start of its buffer860 * to be fixed, which may not be the same as the position861 * of the vma->node due to the guard pages.862 */863 if (offset < guard || offset + size > end - guard)864 return -ENOSPC;865 866 ret = i915_gem_gtt_reserve(vma->vm, ww, &vma->node,867 size + 2 * guard,868 offset - guard,869 color, flags);870 if (ret)871 return ret;872 } else {873 size += 2 * guard;874 /*875 * We only support huge gtt pages through the 48b PPGTT,876 * however we also don't want to force any alignment for877 * objects which need to be tightly packed into the low 32bits.878 *879 * Note that we assume that GGTT are limited to 4GiB for the880 * forseeable future. See also i915_ggtt_offset().881 */882 if (upper_32_bits(end - 1) &&883 vma->page_sizes.sg > I915_GTT_PAGE_SIZE &&884 !HAS_64K_PAGES(vma->vm->i915)) {885 /*886 * We can't mix 64K and 4K PTEs in the same page-table887 * (2M block), and so to avoid the ugliness and888 * complexity of coloring we opt for just aligning 64K889 * objects to 2M.890 */891 u64 page_alignment =892 rounddown_pow_of_two(vma->page_sizes.sg |893 I915_GTT_PAGE_SIZE_2M);894 895 /*896 * Check we don't expand for the limited Global GTT897 * (mappable aperture is even more precious!). This898 * also checks that we exclude the aliasing-ppgtt.899 */900 GEM_BUG_ON(i915_vma_is_ggtt(vma));901 902 alignment = max(alignment, page_alignment);903 904 if (vma->page_sizes.sg & I915_GTT_PAGE_SIZE_64K)905 size = round_up(size, I915_GTT_PAGE_SIZE_2M);906 }907 908 ret = i915_gem_gtt_insert(vma->vm, ww, &vma->node,909 size, alignment, color,910 start, end, flags);911 if (ret)912 return ret;913 914 GEM_BUG_ON(vma->node.start < start);915 GEM_BUG_ON(vma->node.start + vma->node.size > end);916 }917 GEM_BUG_ON(!drm_mm_node_allocated(&vma->node));918 GEM_BUG_ON(!i915_gem_valid_gtt_space(vma, color));919 920 list_move_tail(&vma->vm_link, &vma->vm->bound_list);921 vma->guard = guard;922 923 return 0;924}925 926static void927i915_vma_detach(struct i915_vma *vma)928{929 GEM_BUG_ON(!drm_mm_node_allocated(&vma->node));930 GEM_BUG_ON(i915_vma_is_bound(vma, I915_VMA_GLOBAL_BIND | I915_VMA_LOCAL_BIND));931 932 /*933 * And finally now the object is completely decoupled from this934 * vma, we can drop its hold on the backing storage and allow935 * it to be reaped by the shrinker.936 */937 list_move_tail(&vma->vm_link, &vma->vm->unbound_list);938}939 940static bool try_qad_pin(struct i915_vma *vma, unsigned int flags)941{942 unsigned int bound;943 944 bound = atomic_read(&vma->flags);945 946 if (flags & PIN_VALIDATE) {947 flags &= I915_VMA_BIND_MASK;948 949 return (flags & bound) == flags;950 }951 952 /* with the lock mandatory for unbind, we don't race here */953 flags &= I915_VMA_BIND_MASK;954 do {955 if (unlikely(flags & ~bound))956 return false;957 958 if (unlikely(bound & (I915_VMA_OVERFLOW | I915_VMA_ERROR)))959 return false;960 961 GEM_BUG_ON(((bound + 1) & I915_VMA_PIN_MASK) == 0);962 } while (!atomic_try_cmpxchg(&vma->flags, &bound, bound + 1));963 964 return true;965}966 967static struct scatterlist *968rotate_pages(struct drm_i915_gem_object *obj, unsigned int offset,969 unsigned int width, unsigned int height,970 unsigned int src_stride, unsigned int dst_stride,971 struct sg_table *st, struct scatterlist *sg)972{973 unsigned int column, row;974 pgoff_t src_idx;975 976 for (column = 0; column < width; column++) {977 unsigned int left;978 979 src_idx = src_stride * (height - 1) + column + offset;980 for (row = 0; row < height; row++) {981 st->nents++;982 /*983 * We don't need the pages, but need to initialize984 * the entries so the sg list can be happily traversed.985 * The only thing we need are DMA addresses.986 */987 sg_set_page(sg, NULL, I915_GTT_PAGE_SIZE, 0);988 sg_dma_address(sg) =989 i915_gem_object_get_dma_address(obj, src_idx);990 sg_dma_len(sg) = I915_GTT_PAGE_SIZE;991 sg = sg_next(sg);992 src_idx -= src_stride;993 }994 995 left = (dst_stride - height) * I915_GTT_PAGE_SIZE;996 997 if (!left)998 continue;999 1000 st->nents++;1001 1002 /*1003 * The DE ignores the PTEs for the padding tiles, the sg entry1004 * here is just a conenience to indicate how many padding PTEs1005 * to insert at this spot.1006 */1007 sg_set_page(sg, NULL, left, 0);1008 sg_dma_address(sg) = 0;1009 sg_dma_len(sg) = left;1010 sg = sg_next(sg);1011 }1012 1013 return sg;1014}1015 1016static noinline struct sg_table *1017intel_rotate_pages(struct intel_rotation_info *rot_info,1018 struct drm_i915_gem_object *obj)1019{1020 unsigned int size = intel_rotation_info_size(rot_info);1021 struct drm_i915_private *i915 = to_i915(obj->base.dev);1022 struct sg_table *st;1023 struct scatterlist *sg;1024 int ret = -ENOMEM;1025 int i;1026 1027 /* Allocate target SG list. */1028 st = kmalloc(sizeof(*st), GFP_KERNEL);1029 if (!st)1030 goto err_st_alloc;1031 1032 ret = sg_alloc_table(st, size, GFP_KERNEL);1033 if (ret)1034 goto err_sg_alloc;1035 1036 st->nents = 0;1037 sg = st->sgl;1038 1039 for (i = 0 ; i < ARRAY_SIZE(rot_info->plane); i++)1040 sg = rotate_pages(obj, rot_info->plane[i].offset,1041 rot_info->plane[i].width, rot_info->plane[i].height,1042 rot_info->plane[i].src_stride,1043 rot_info->plane[i].dst_stride,1044 st, sg);1045 1046 return st;1047 1048err_sg_alloc:1049 kfree(st);1050err_st_alloc:1051 1052 drm_dbg(&i915->drm, "Failed to create rotated mapping for object size %zu! (%ux%u tiles, %u pages)\n",1053 obj->base.size, rot_info->plane[0].width,1054 rot_info->plane[0].height, size);1055 1056 return ERR_PTR(ret);1057}1058 1059static struct scatterlist *1060add_padding_pages(unsigned int count,1061 struct sg_table *st, struct scatterlist *sg)1062{1063 st->nents++;1064 1065 /*1066 * The DE ignores the PTEs for the padding tiles, the sg entry1067 * here is just a convenience to indicate how many padding PTEs1068 * to insert at this spot.1069 */1070 sg_set_page(sg, NULL, count * I915_GTT_PAGE_SIZE, 0);1071 sg_dma_address(sg) = 0;1072 sg_dma_len(sg) = count * I915_GTT_PAGE_SIZE;1073 sg = sg_next(sg);1074 1075 return sg;1076}1077 1078static struct scatterlist *1079remap_tiled_color_plane_pages(struct drm_i915_gem_object *obj,1080 unsigned long offset, unsigned int alignment_pad,1081 unsigned int width, unsigned int height,1082 unsigned int src_stride, unsigned int dst_stride,1083 struct sg_table *st, struct scatterlist *sg,1084 unsigned int *gtt_offset)1085{1086 unsigned int row;1087 1088 if (!width || !height)1089 return sg;1090 1091 if (alignment_pad)1092 sg = add_padding_pages(alignment_pad, st, sg);1093 1094 for (row = 0; row < height; row++) {1095 unsigned int left = width * I915_GTT_PAGE_SIZE;1096 1097 while (left) {1098 dma_addr_t addr;1099 unsigned int length;1100 1101 /*1102 * We don't need the pages, but need to initialize1103 * the entries so the sg list can be happily traversed.1104 * The only thing we need are DMA addresses.1105 */1106 1107 addr = i915_gem_object_get_dma_address_len(obj, offset, &length);1108 1109 length = min(left, length);1110 1111 st->nents++;1112 1113 sg_set_page(sg, NULL, length, 0);1114 sg_dma_address(sg) = addr;1115 sg_dma_len(sg) = length;1116 sg = sg_next(sg);1117 1118 offset += length / I915_GTT_PAGE_SIZE;1119 left -= length;1120 }1121 1122 offset += src_stride - width;1123 1124 left = (dst_stride - width) * I915_GTT_PAGE_SIZE;1125 1126 if (!left)1127 continue;1128 1129 sg = add_padding_pages(left >> PAGE_SHIFT, st, sg);1130 }1131 1132 *gtt_offset += alignment_pad + dst_stride * height;1133 1134 return sg;1135}1136 1137static struct scatterlist *1138remap_contiguous_pages(struct drm_i915_gem_object *obj,1139 pgoff_t obj_offset,1140 unsigned int count,1141 struct sg_table *st, struct scatterlist *sg)1142{1143 struct scatterlist *iter;1144 unsigned int offset;1145 1146 iter = i915_gem_object_get_sg_dma(obj, obj_offset, &offset);1147 GEM_BUG_ON(!iter);1148 1149 do {1150 unsigned int len;1151 1152 len = min(sg_dma_len(iter) - (offset << PAGE_SHIFT),1153 count << PAGE_SHIFT);1154 sg_set_page(sg, NULL, len, 0);1155 sg_dma_address(sg) =1156 sg_dma_address(iter) + (offset << PAGE_SHIFT);1157 sg_dma_len(sg) = len;1158 1159 st->nents++;1160 count -= len >> PAGE_SHIFT;1161 if (count == 0)1162 return sg;1163 1164 sg = __sg_next(sg);1165 iter = __sg_next(iter);1166 offset = 0;1167 } while (1);1168}1169 1170static struct scatterlist *1171remap_linear_color_plane_pages(struct drm_i915_gem_object *obj,1172 pgoff_t obj_offset, unsigned int alignment_pad,1173 unsigned int size,1174 struct sg_table *st, struct scatterlist *sg,1175 unsigned int *gtt_offset)1176{1177 if (!size)1178 return sg;1179 1180 if (alignment_pad)1181 sg = add_padding_pages(alignment_pad, st, sg);1182 1183 sg = remap_contiguous_pages(obj, obj_offset, size, st, sg);1184 sg = sg_next(sg);1185 1186 *gtt_offset += alignment_pad + size;1187 1188 return sg;1189}1190 1191static struct scatterlist *1192remap_color_plane_pages(const struct intel_remapped_info *rem_info,1193 struct drm_i915_gem_object *obj,1194 int color_plane,1195 struct sg_table *st, struct scatterlist *sg,1196 unsigned int *gtt_offset)1197{1198 unsigned int alignment_pad = 0;1199 1200 if (rem_info->plane_alignment)1201 alignment_pad = ALIGN(*gtt_offset, rem_info->plane_alignment) - *gtt_offset;1202 1203 if (rem_info->plane[color_plane].linear)1204 sg = remap_linear_color_plane_pages(obj,1205 rem_info->plane[color_plane].offset,1206 alignment_pad,1207 rem_info->plane[color_plane].size,1208 st, sg,1209 gtt_offset);1210 1211 else1212 sg = remap_tiled_color_plane_pages(obj,1213 rem_info->plane[color_plane].offset,1214 alignment_pad,1215 rem_info->plane[color_plane].width,1216 rem_info->plane[color_plane].height,1217 rem_info->plane[color_plane].src_stride,1218 rem_info->plane[color_plane].dst_stride,1219 st, sg,1220 gtt_offset);1221 1222 return sg;1223}1224 1225static noinline struct sg_table *1226intel_remap_pages(struct intel_remapped_info *rem_info,1227 struct drm_i915_gem_object *obj)1228{1229 unsigned int size = intel_remapped_info_size(rem_info);1230 struct drm_i915_private *i915 = to_i915(obj->base.dev);1231 struct sg_table *st;1232 struct scatterlist *sg;1233 unsigned int gtt_offset = 0;1234 int ret = -ENOMEM;1235 int i;1236 1237 /* Allocate target SG list. */1238 st = kmalloc(sizeof(*st), GFP_KERNEL);1239 if (!st)1240 goto err_st_alloc;1241 1242 ret = sg_alloc_table(st, size, GFP_KERNEL);1243 if (ret)1244 goto err_sg_alloc;1245 1246 st->nents = 0;1247 sg = st->sgl;1248 1249 for (i = 0 ; i < ARRAY_SIZE(rem_info->plane); i++)1250 sg = remap_color_plane_pages(rem_info, obj, i, st, sg, >t_offset);1251 1252 i915_sg_trim(st);1253 1254 return st;1255 1256err_sg_alloc:1257 kfree(st);1258err_st_alloc:1259 1260 drm_dbg(&i915->drm, "Failed to create remapped mapping for object size %zu! (%ux%u tiles, %u pages)\n",1261 obj->base.size, rem_info->plane[0].width,1262 rem_info->plane[0].height, size);1263 1264 return ERR_PTR(ret);1265}1266 1267static noinline struct sg_table *1268intel_partial_pages(const struct i915_gtt_view *view,1269 struct drm_i915_gem_object *obj)1270{1271 struct sg_table *st;1272 struct scatterlist *sg;1273 unsigned int count = view->partial.size;1274 int ret = -ENOMEM;1275 1276 st = kmalloc(sizeof(*st), GFP_KERNEL);1277 if (!st)1278 goto err_st_alloc;1279 1280 ret = sg_alloc_table(st, count, GFP_KERNEL);1281 if (ret)1282 goto err_sg_alloc;1283 1284 st->nents = 0;1285 1286 sg = remap_contiguous_pages(obj, view->partial.offset, count, st, st->sgl);1287 1288 sg_mark_end(sg);1289 i915_sg_trim(st); /* Drop any unused tail entries. */1290 1291 return st;1292 1293err_sg_alloc:1294 kfree(st);1295err_st_alloc:1296 return ERR_PTR(ret);1297}1298 1299static int1300__i915_vma_get_pages(struct i915_vma *vma)1301{1302 struct sg_table *pages;1303 1304 /*1305 * The vma->pages are only valid within the lifespan of the borrowed1306 * obj->mm.pages. When the obj->mm.pages sg_table is regenerated, so1307 * must be the vma->pages. A simple rule is that vma->pages must only1308 * be accessed when the obj->mm.pages are pinned.1309 */1310 GEM_BUG_ON(!i915_gem_object_has_pinned_pages(vma->obj));1311 1312 switch (vma->gtt_view.type) {1313 default:1314 GEM_BUG_ON(vma->gtt_view.type);1315 fallthrough;1316 case I915_GTT_VIEW_NORMAL:1317 pages = vma->obj->mm.pages;1318 break;1319 1320 case I915_GTT_VIEW_ROTATED:1321 pages =1322 intel_rotate_pages(&vma->gtt_view.rotated, vma->obj);1323 break;1324 1325 case I915_GTT_VIEW_REMAPPED:1326 pages =1327 intel_remap_pages(&vma->gtt_view.remapped, vma->obj);1328 break;1329 1330 case I915_GTT_VIEW_PARTIAL:1331 pages = intel_partial_pages(&vma->gtt_view, vma->obj);1332 break;1333 }1334 1335 if (IS_ERR(pages)) {1336 drm_err(&vma->vm->i915->drm,1337 "Failed to get pages for VMA view type %u (%ld)!\n",1338 vma->gtt_view.type, PTR_ERR(pages));1339 return PTR_ERR(pages);1340 }1341 1342 vma->pages = pages;1343 1344 return 0;1345}1346 1347I915_SELFTEST_EXPORT int i915_vma_get_pages(struct i915_vma *vma)1348{1349 int err;1350 1351 if (atomic_add_unless(&vma->pages_count, 1, 0))1352 return 0;1353 1354 err = i915_gem_object_pin_pages(vma->obj);1355 if (err)1356 return err;1357 1358 err = __i915_vma_get_pages(vma);1359 if (err)1360 goto err_unpin;1361 1362 vma->page_sizes = vma->obj->mm.page_sizes;1363 atomic_inc(&vma->pages_count);1364 1365 return 0;1366 1367err_unpin:1368 __i915_gem_object_unpin_pages(vma->obj);1369 1370 return err;1371}1372 1373void vma_invalidate_tlb(struct i915_address_space *vm, u32 *tlb)1374{1375 struct intel_gt *gt;1376 int id;1377 1378 if (!tlb)1379 return;1380 1381 /*1382 * Before we release the pages that were bound by this vma, we1383 * must invalidate all the TLBs that may still have a reference1384 * back to our physical address. It only needs to be done once,1385 * so after updating the PTE to point away from the pages, record1386 * the most recent TLB invalidation seqno, and if we have not yet1387 * flushed the TLBs upon release, perform a full invalidation.1388 */1389 for_each_gt(gt, vm->i915, id)1390 WRITE_ONCE(tlb[id],1391 intel_gt_next_invalidate_tlb_full(gt));1392}1393 1394static void __vma_put_pages(struct i915_vma *vma, unsigned int count)1395{1396 /* We allocate under vma_get_pages, so beware the shrinker */1397 GEM_BUG_ON(atomic_read(&vma->pages_count) < count);1398 1399 if (atomic_sub_return(count, &vma->pages_count) == 0) {1400 if (vma->pages != vma->obj->mm.pages) {1401 sg_free_table(vma->pages);1402 kfree(vma->pages);1403 }1404 vma->pages = NULL;1405 1406 i915_gem_object_unpin_pages(vma->obj);1407 }1408}1409 1410I915_SELFTEST_EXPORT void i915_vma_put_pages(struct i915_vma *vma)1411{1412 if (atomic_add_unless(&vma->pages_count, -1, 1))1413 return;1414 1415 __vma_put_pages(vma, 1);1416}1417 1418static void vma_unbind_pages(struct i915_vma *vma)1419{1420 unsigned int count;1421 1422 lockdep_assert_held(&vma->vm->mutex);1423 1424 /* The upper portion of pages_count is the number of bindings */1425 count = atomic_read(&vma->pages_count);1426 count >>= I915_VMA_PAGES_BIAS;1427 GEM_BUG_ON(!count);1428 1429 __vma_put_pages(vma, count | count << I915_VMA_PAGES_BIAS);1430}1431 1432int i915_vma_pin_ww(struct i915_vma *vma, struct i915_gem_ww_ctx *ww,1433 u64 size, u64 alignment, u64 flags)1434{1435 struct i915_vma_work *work = NULL;1436 struct dma_fence *moving = NULL;1437 struct i915_vma_resource *vma_res = NULL;1438 intel_wakeref_t wakeref;1439 unsigned int bound;1440 int err;1441 1442 assert_vma_held(vma);1443 GEM_BUG_ON(!ww);1444 1445 BUILD_BUG_ON(PIN_GLOBAL != I915_VMA_GLOBAL_BIND);1446 BUILD_BUG_ON(PIN_USER != I915_VMA_LOCAL_BIND);1447 1448 GEM_BUG_ON(!(flags & (PIN_USER | PIN_GLOBAL)));1449 1450 /* First try and grab the pin without rebinding the vma */1451 if (try_qad_pin(vma, flags))1452 return 0;1453 1454 err = i915_vma_get_pages(vma);1455 if (err)1456 return err;1457 1458 /*1459 * In case of a global GTT, we must hold a runtime-pm wakeref1460 * while global PTEs are updated. In other cases, we hold1461 * the rpm reference while the VMA is active. Since runtime1462 * resume may require allocations, which are forbidden inside1463 * vm->mutex, get the first rpm wakeref outside of the mutex.1464 */1465 wakeref = intel_runtime_pm_get(&vma->vm->i915->runtime_pm);1466 1467 if (flags & vma->vm->bind_async_flags) {1468 /* lock VM */1469 err = i915_vm_lock_objects(vma->vm, ww);1470 if (err)1471 goto err_rpm;1472 1473 work = i915_vma_work();1474 if (!work) {1475 err = -ENOMEM;1476 goto err_rpm;1477 }1478 1479 work->vm = vma->vm;1480 1481 err = i915_gem_object_get_moving_fence(vma->obj, &moving);1482 if (err)1483 goto err_rpm;1484 1485 dma_fence_work_chain(&work->base, moving);1486 1487 /* Allocate enough page directories to used PTE */1488 if (vma->vm->allocate_va_range) {1489 err = i915_vm_alloc_pt_stash(vma->vm,1490 &work->stash,1491 vma->size);1492 if (err)1493 goto err_fence;1494 1495 err = i915_vm_map_pt_stash(vma->vm, &work->stash);1496 if (err)1497 goto err_fence;1498 }1499 }1500 1501 vma_res = i915_vma_resource_alloc();1502 if (IS_ERR(vma_res)) {1503 err = PTR_ERR(vma_res);1504 goto err_fence;1505 }1506 1507 /*1508 * Differentiate between user/kernel vma inside the aliasing-ppgtt.1509 *1510 * We conflate the Global GTT with the user's vma when using the1511 * aliasing-ppgtt, but it is still vitally important to try and1512 * keep the use cases distinct. For example, userptr objects are1513 * not allowed inside the Global GTT as that will cause lock1514 * inversions when we have to evict them the mmu_notifier callbacks -1515 * but they are allowed to be part of the user ppGTT which can never1516 * be mapped. As such we try to give the distinct users of the same1517 * mutex, distinct lockclasses [equivalent to how we keep i915_ggtt1518 * and i915_ppgtt separate].1519 *1520 * NB this may cause us to mask real lock inversions -- while the1521 * code is safe today, lockdep may not be able to spot future1522 * transgressions.1523 */1524 err = mutex_lock_interruptible_nested(&vma->vm->mutex,1525 !(flags & PIN_GLOBAL));1526 if (err)1527 goto err_vma_res;1528 1529 /* No more allocations allowed now we hold vm->mutex */1530 1531 if (unlikely(i915_vma_is_closed(vma))) {1532 err = -ENOENT;1533 goto err_unlock;1534 }1535 1536 bound = atomic_read(&vma->flags);1537 if (unlikely(bound & I915_VMA_ERROR)) {1538 err = -ENOMEM;1539 goto err_unlock;1540 }1541 1542 if (unlikely(!((bound + 1) & I915_VMA_PIN_MASK))) {1543 err = -EAGAIN; /* pins are meant to be fairly temporary */1544 goto err_unlock;1545 }1546 1547 if (unlikely(!(flags & ~bound & I915_VMA_BIND_MASK))) {1548 if (!(flags & PIN_VALIDATE))1549 __i915_vma_pin(vma);1550 goto err_unlock;1551 }1552 1553 err = i915_active_acquire(&vma->active);1554 if (err)1555 goto err_unlock;1556 1557 if (!(bound & I915_VMA_BIND_MASK)) {1558 err = i915_vma_insert(vma, ww, size, alignment, flags);1559 if (err)1560 goto err_active;1561 1562 if (i915_is_ggtt(vma->vm))1563 __i915_vma_set_map_and_fenceable(vma);1564 }1565 1566 GEM_BUG_ON(!vma->pages);1567 err = i915_vma_bind(vma,1568 vma->obj->pat_index,1569 flags, work, vma_res);1570 vma_res = NULL;1571 if (err)1572 goto err_remove;1573 1574 /* There should only be at most 2 active bindings (user, global) */1575 GEM_BUG_ON(bound + I915_VMA_PAGES_ACTIVE < bound);1576 atomic_add(I915_VMA_PAGES_ACTIVE, &vma->pages_count);1577 list_move_tail(&vma->vm_link, &vma->vm->bound_list);1578 1579 if (!(flags & PIN_VALIDATE)) {1580 __i915_vma_pin(vma);1581 GEM_BUG_ON(!i915_vma_is_pinned(vma));1582 }1583 GEM_BUG_ON(!i915_vma_is_bound(vma, flags));1584 GEM_BUG_ON(i915_vma_misplaced(vma, size, alignment, flags));1585 1586err_remove:1587 if (!i915_vma_is_bound(vma, I915_VMA_BIND_MASK)) {1588 i915_vma_detach(vma);1589 drm_mm_remove_node(&vma->node);1590 }1591err_active:1592 i915_active_release(&vma->active);1593err_unlock:1594 mutex_unlock(&vma->vm->mutex);1595err_vma_res:1596 i915_vma_resource_free(vma_res);1597err_fence:1598 if (work)1599 dma_fence_work_commit_imm(&work->base);1600err_rpm:1601 intel_runtime_pm_put(&vma->vm->i915->runtime_pm, wakeref);1602 1603 if (moving)1604 dma_fence_put(moving);1605 1606 i915_vma_put_pages(vma);1607 return err;1608}1609 1610static void flush_idle_contexts(struct intel_gt *gt)1611{1612 struct intel_engine_cs *engine;1613 enum intel_engine_id id;1614 1615 for_each_engine(engine, gt, id)1616 intel_engine_flush_barriers(engine);1617 1618 intel_gt_wait_for_idle(gt, MAX_SCHEDULE_TIMEOUT);1619}1620 1621static int __i915_ggtt_pin(struct i915_vma *vma, struct i915_gem_ww_ctx *ww,1622 u32 align, unsigned int flags)1623{1624 struct i915_address_space *vm = vma->vm;1625 struct intel_gt *gt;1626 struct i915_ggtt *ggtt = i915_vm_to_ggtt(vm);1627 int err;1628 1629 do {1630 err = i915_vma_pin_ww(vma, ww, 0, align, flags | PIN_GLOBAL);1631 1632 if (err != -ENOSPC) {1633 if (!err) {1634 err = i915_vma_wait_for_bind(vma);1635 if (err)1636 i915_vma_unpin(vma);1637 }1638 return err;1639 }1640 1641 /* Unlike i915_vma_pin, we don't take no for an answer! */1642 list_for_each_entry(gt, &ggtt->gt_list, ggtt_link)1643 flush_idle_contexts(gt);1644 if (mutex_lock_interruptible(&vm->mutex) == 0) {1645 /*1646 * We pass NULL ww here, as we don't want to unbind1647 * locked objects when called from execbuf when pinning1648 * is removed. This would probably regress badly.1649 */1650 i915_gem_evict_vm(vm, NULL, NULL);1651 mutex_unlock(&vm->mutex);1652 }1653 } while (1);1654}1655 1656int i915_ggtt_pin(struct i915_vma *vma, struct i915_gem_ww_ctx *ww,1657 u32 align, unsigned int flags)1658{1659 struct i915_gem_ww_ctx _ww;1660 int err;1661 1662 GEM_BUG_ON(!i915_vma_is_ggtt(vma));1663 1664 if (ww)1665 return __i915_ggtt_pin(vma, ww, align, flags);1666 1667 lockdep_assert_not_held(&vma->obj->base.resv->lock.base);1668 1669 for_i915_gem_ww(&_ww, err, true) {1670 err = i915_gem_object_lock(vma->obj, &_ww);1671 if (!err)1672 err = __i915_ggtt_pin(vma, &_ww, align, flags);1673 }1674 1675 return err;1676}1677 1678/**1679 * i915_ggtt_clear_scanout - Clear scanout flag for all objects ggtt vmas1680 * @obj: i915 GEM object1681 * This function clears scanout flags for objects ggtt vmas. These flags are set1682 * when object is pinned for display use and this function to clear them all is1683 * targeted to be called by frontbuffer tracking code when the frontbuffer is1684 * about to be released.1685 */1686void i915_ggtt_clear_scanout(struct drm_i915_gem_object *obj)1687{1688 struct i915_vma *vma;1689 1690 spin_lock(&obj->vma.lock);1691 for_each_ggtt_vma(vma, obj) {1692 i915_vma_clear_scanout(vma);1693 vma->display_alignment = I915_GTT_MIN_ALIGNMENT;1694 }1695 spin_unlock(&obj->vma.lock);1696}1697 1698static void __vma_close(struct i915_vma *vma, struct intel_gt *gt)1699{1700 /*1701 * We defer actually closing, unbinding and destroying the VMA until1702 * the next idle point, or if the object is freed in the meantime. By1703 * postponing the unbind, we allow for it to be resurrected by the1704 * client, avoiding the work required to rebind the VMA. This is1705 * advantageous for DRI, where the client/server pass objects1706 * between themselves, temporarily opening a local VMA to the1707 * object, and then closing it again. The same object is then reused1708 * on the next frame (or two, depending on the depth of the swap queue)1709 * causing us to rebind the VMA once more. This ends up being a lot1710 * of wasted work for the steady state.1711 */1712 GEM_BUG_ON(i915_vma_is_closed(vma));1713 list_add(&vma->closed_link, >->closed_vma);1714}1715 1716void i915_vma_close(struct i915_vma *vma)1717{1718 struct intel_gt *gt = vma->vm->gt;1719 unsigned long flags;1720 1721 if (i915_vma_is_ggtt(vma))1722 return;1723 1724 GEM_BUG_ON(!atomic_read(&vma->open_count));1725 if (atomic_dec_and_lock_irqsave(&vma->open_count,1726 >->closed_lock,1727 flags)) {1728 __vma_close(vma, gt);1729 spin_unlock_irqrestore(>->closed_lock, flags);1730 }1731}1732 1733static void __i915_vma_remove_closed(struct i915_vma *vma)1734{1735 list_del_init(&vma->closed_link);1736}1737 1738void i915_vma_reopen(struct i915_vma *vma)1739{1740 struct intel_gt *gt = vma->vm->gt;1741 1742 spin_lock_irq(>->closed_lock);1743 if (i915_vma_is_closed(vma))1744 __i915_vma_remove_closed(vma);1745 spin_unlock_irq(>->closed_lock);1746}1747 1748static void force_unbind(struct i915_vma *vma)1749{1750 if (!drm_mm_node_allocated(&vma->node))1751 return;1752 1753 atomic_and(~I915_VMA_PIN_MASK, &vma->flags);1754 WARN_ON(__i915_vma_unbind(vma));1755 GEM_BUG_ON(drm_mm_node_allocated(&vma->node));1756}1757 1758static void release_references(struct i915_vma *vma, struct intel_gt *gt,1759 bool vm_ddestroy)1760{1761 struct drm_i915_gem_object *obj = vma->obj;1762 1763 GEM_BUG_ON(i915_vma_is_active(vma));1764 1765 spin_lock(&obj->vma.lock);1766 list_del(&vma->obj_link);1767 if (!RB_EMPTY_NODE(&vma->obj_node))1768 rb_erase(&vma->obj_node, &obj->vma.tree);1769 1770 spin_unlock(&obj->vma.lock);1771 1772 spin_lock_irq(>->closed_lock);1773 __i915_vma_remove_closed(vma);1774 spin_unlock_irq(>->closed_lock);1775 1776 if (vm_ddestroy)1777 i915_vm_resv_put(vma->vm);1778 1779 i915_active_fini(&vma->active);1780 GEM_WARN_ON(vma->resource);1781 i915_vma_free(vma);1782}1783 1784/*1785 * i915_vma_destroy_locked - Remove all weak reference to the vma and put1786 * the initial reference.1787 *1788 * This function should be called when it's decided the vma isn't needed1789 * anymore. The caller must assure that it doesn't race with another lookup1790 * plus destroy, typically by taking an appropriate reference.1791 *1792 * Current callsites are1793 * - __i915_gem_object_pages_fini()1794 * - __i915_vm_close() - Blocks the above function by taking a reference on1795 * the object.1796 * - __i915_vma_parked() - Blocks the above functions by taking a reference1797 * on the vm and a reference on the object. Also takes the object lock so1798 * destruction from __i915_vma_parked() can be blocked by holding the1799 * object lock. Since the object lock is only allowed from within i915 with1800 * an object refcount, holding the object lock also implicitly blocks the1801 * vma freeing from __i915_gem_object_pages_fini().1802 *1803 * Because of locks taken during destruction, a vma is also guaranteed to1804 * stay alive while the following locks are held if it was looked up while1805 * holding one of the locks:1806 * - vm->mutex1807 * - obj->vma.lock1808 * - gt->closed_lock1809 */1810void i915_vma_destroy_locked(struct i915_vma *vma)1811{1812 lockdep_assert_held(&vma->vm->mutex);1813 1814 force_unbind(vma);1815 list_del_init(&vma->vm_link);1816 release_references(vma, vma->vm->gt, false);1817}1818 1819void i915_vma_destroy(struct i915_vma *vma)1820{1821 struct intel_gt *gt;1822 bool vm_ddestroy;1823 1824 mutex_lock(&vma->vm->mutex);1825 force_unbind(vma);1826 list_del_init(&vma->vm_link);1827 vm_ddestroy = vma->vm_ddestroy;1828 vma->vm_ddestroy = false;1829 1830 /* vma->vm may be freed when releasing vma->vm->mutex. */1831 gt = vma->vm->gt;1832 mutex_unlock(&vma->vm->mutex);1833 release_references(vma, gt, vm_ddestroy);1834}1835 1836void i915_vma_parked(struct intel_gt *gt)1837{1838 struct i915_vma *vma, *next;1839 LIST_HEAD(closed);1840 1841 spin_lock_irq(>->closed_lock);1842 list_for_each_entry_safe(vma, next, >->closed_vma, closed_link) {1843 struct drm_i915_gem_object *obj = vma->obj;1844 struct i915_address_space *vm = vma->vm;1845 1846 /* XXX All to avoid keeping a reference on i915_vma itself */1847 1848 if (!kref_get_unless_zero(&obj->base.refcount))1849 continue;1850 1851 if (!i915_vm_tryget(vm)) {1852 i915_gem_object_put(obj);1853 continue;1854 }1855 1856 list_move(&vma->closed_link, &closed);1857 }1858 spin_unlock_irq(>->closed_lock);1859 1860 /* As the GT is held idle, no vma can be reopened as we destroy them */1861 list_for_each_entry_safe(vma, next, &closed, closed_link) {1862 struct drm_i915_gem_object *obj = vma->obj;1863 struct i915_address_space *vm = vma->vm;1864 1865 if (i915_gem_object_trylock(obj, NULL)) {1866 INIT_LIST_HEAD(&vma->closed_link);1867 i915_vma_destroy(vma);1868 i915_gem_object_unlock(obj);1869 } else {1870 /* back you go.. */1871 spin_lock_irq(>->closed_lock);1872 list_add(&vma->closed_link, >->closed_vma);1873 spin_unlock_irq(>->closed_lock);1874 }1875 1876 i915_gem_object_put(obj);1877 i915_vm_put(vm);1878 }1879}1880 1881static void __i915_vma_iounmap(struct i915_vma *vma)1882{1883 GEM_BUG_ON(i915_vma_is_pinned(vma));1884 1885 if (vma->iomap == NULL)1886 return;1887 1888 if (page_unmask_bits(vma->iomap))1889 __i915_gem_object_release_map(vma->obj);1890 else1891 io_mapping_unmap(vma->iomap);1892 vma->iomap = NULL;1893}1894 1895void i915_vma_revoke_mmap(struct i915_vma *vma)1896{1897 struct drm_vma_offset_node *node;1898 u64 vma_offset;1899 1900 if (!i915_vma_has_userfault(vma))1901 return;1902 1903 GEM_BUG_ON(!i915_vma_is_map_and_fenceable(vma));1904 GEM_BUG_ON(!vma->obj->userfault_count);1905 1906 node = &vma->mmo->vma_node;1907 vma_offset = vma->gtt_view.partial.offset << PAGE_SHIFT;1908 unmap_mapping_range(vma->vm->i915->drm.anon_inode->i_mapping,1909 drm_vma_node_offset_addr(node) + vma_offset,1910 vma->size,1911 1);1912 1913 i915_vma_unset_userfault(vma);1914 if (!--vma->obj->userfault_count)1915 list_del(&vma->obj->userfault_link);1916}1917 1918static int1919__i915_request_await_bind(struct i915_request *rq, struct i915_vma *vma)1920{1921 return __i915_request_await_exclusive(rq, &vma->active);1922}1923 1924static int __i915_vma_move_to_active(struct i915_vma *vma, struct i915_request *rq)1925{1926 int err;1927 1928 /* Wait for the vma to be bound before we start! */1929 err = __i915_request_await_bind(rq, vma);1930 if (err)1931 return err;1932 1933 return i915_active_add_request(&vma->active, rq);1934}1935 1936int _i915_vma_move_to_active(struct i915_vma *vma,1937 struct i915_request *rq,1938 struct dma_fence *fence,1939 unsigned int flags)1940{1941 struct drm_i915_gem_object *obj = vma->obj;1942 int err;1943 1944 assert_object_held(obj);1945 1946 GEM_BUG_ON(!vma->pages);1947 1948 if (!(flags & __EXEC_OBJECT_NO_REQUEST_AWAIT)) {1949 err = i915_request_await_object(rq, vma->obj, flags & EXEC_OBJECT_WRITE);1950 if (unlikely(err))1951 return err;1952 }1953 err = __i915_vma_move_to_active(vma, rq);1954 if (unlikely(err))1955 return err;1956 1957 /*1958 * Reserve fences slot early to prevent an allocation after preparing1959 * the workload and associating fences with dma_resv.1960 */1961 if (fence && !(flags & __EXEC_OBJECT_NO_RESERVE)) {1962 struct dma_fence *curr;1963 int idx;1964 1965 dma_fence_array_for_each(curr, idx, fence)1966 ;1967 err = dma_resv_reserve_fences(vma->obj->base.resv, idx);1968 if (unlikely(err))1969 return err;1970 }1971 1972 if (flags & EXEC_OBJECT_WRITE) {1973 struct intel_frontbuffer *front;1974 1975 front = i915_gem_object_get_frontbuffer(obj);1976 if (unlikely(front)) {1977 if (intel_frontbuffer_invalidate(front, ORIGIN_CS))1978 i915_active_add_request(&front->write, rq);1979 intel_frontbuffer_put(front);1980 }1981 }1982 1983 if (fence) {1984 struct dma_fence *curr;1985 enum dma_resv_usage usage;1986 int idx;1987 1988 if (flags & EXEC_OBJECT_WRITE) {1989 usage = DMA_RESV_USAGE_WRITE;1990 obj->write_domain = I915_GEM_DOMAIN_RENDER;1991 obj->read_domains = 0;1992 } else {1993 usage = DMA_RESV_USAGE_READ;1994 obj->write_domain = 0;1995 }1996 1997 dma_fence_array_for_each(curr, idx, fence)1998 dma_resv_add_fence(vma->obj->base.resv, curr, usage);1999 }2000 2001 if (flags & EXEC_OBJECT_NEEDS_FENCE && vma->fence)2002 i915_active_add_request(&vma->fence->active, rq);2003 2004 obj->read_domains |= I915_GEM_GPU_DOMAINS;2005 obj->mm.dirty = true;2006 2007 GEM_BUG_ON(!i915_vma_is_active(vma));2008 return 0;2009}2010 2011struct dma_fence *__i915_vma_evict(struct i915_vma *vma, bool async)2012{2013 struct i915_vma_resource *vma_res = vma->resource;2014 struct dma_fence *unbind_fence;2015 2016 GEM_BUG_ON(i915_vma_is_pinned(vma));2017 assert_vma_held_evict(vma);2018 2019 if (i915_vma_is_map_and_fenceable(vma)) {2020 /* Force a pagefault for domain tracking on next user access */2021 i915_vma_revoke_mmap(vma);2022 2023 /*2024 * Check that we have flushed all writes through the GGTT2025 * before the unbind, other due to non-strict nature of those2026 * indirect writes they may end up referencing the GGTT PTE2027 * after the unbind.2028 *2029 * Note that we may be concurrently poking at the GGTT_WRITE2030 * bit from set-domain, as we mark all GGTT vma associated2031 * with an object. We know this is for another vma, as we2032 * are currently unbinding this one -- so if this vma will be2033 * reused, it will be refaulted and have its dirty bit set2034 * before the next write.2035 */2036 i915_vma_flush_writes(vma);2037 2038 /* release the fence reg _after_ flushing */2039 i915_vma_revoke_fence(vma);2040 2041 clear_bit(I915_VMA_CAN_FENCE_BIT, __i915_vma_flags(vma));2042 }2043 2044 __i915_vma_iounmap(vma);2045 2046 GEM_BUG_ON(vma->fence);2047 GEM_BUG_ON(i915_vma_has_userfault(vma));2048 2049 /* Object backend must be async capable. */2050 GEM_WARN_ON(async && !vma->resource->bi.pages_rsgt);2051 2052 /* If vm is not open, unbind is a nop. */2053 vma_res->needs_wakeref = i915_vma_is_bound(vma, I915_VMA_GLOBAL_BIND) &&2054 kref_read(&vma->vm->ref);2055 vma_res->skip_pte_rewrite = !kref_read(&vma->vm->ref) ||2056 vma->vm->skip_pte_rewrite;2057 trace_i915_vma_unbind(vma);2058 2059 if (async)2060 unbind_fence = i915_vma_resource_unbind(vma_res,2061 vma->obj->mm.tlb);2062 else2063 unbind_fence = i915_vma_resource_unbind(vma_res, NULL);2064 2065 vma->resource = NULL;2066 2067 atomic_and(~(I915_VMA_BIND_MASK | I915_VMA_ERROR | I915_VMA_GGTT_WRITE),2068 &vma->flags);2069 2070 i915_vma_detach(vma);2071 2072 if (!async) {2073 if (unbind_fence) {2074 dma_fence_wait(unbind_fence, false);2075 dma_fence_put(unbind_fence);2076 unbind_fence = NULL;2077 }2078 vma_invalidate_tlb(vma->vm, vma->obj->mm.tlb);2079 }2080 2081 /*2082 * Binding itself may not have completed until the unbind fence signals,2083 * so don't drop the pages until that happens, unless the resource is2084 * async_capable.2085 */2086 2087 vma_unbind_pages(vma);2088 return unbind_fence;2089}2090 2091int __i915_vma_unbind(struct i915_vma *vma)2092{2093 int ret;2094 2095 lockdep_assert_held(&vma->vm->mutex);2096 assert_vma_held_evict(vma);2097 2098 if (!drm_mm_node_allocated(&vma->node))2099 return 0;2100 2101 if (i915_vma_is_pinned(vma)) {2102 vma_print_allocator(vma, "is pinned");2103 return -EAGAIN;2104 }2105 2106 /*2107 * After confirming that no one else is pinning this vma, wait for2108 * any laggards who may have crept in during the wait (through2109 * a residual pin skipping the vm->mutex) to complete.2110 */2111 ret = i915_vma_sync(vma);2112 if (ret)2113 return ret;2114 2115 GEM_BUG_ON(i915_vma_is_active(vma));2116 __i915_vma_evict(vma, false);2117 2118 drm_mm_remove_node(&vma->node); /* pairs with i915_vma_release() */2119 return 0;2120}2121 2122static struct dma_fence *__i915_vma_unbind_async(struct i915_vma *vma)2123{2124 struct dma_fence *fence;2125 2126 lockdep_assert_held(&vma->vm->mutex);2127 2128 if (!drm_mm_node_allocated(&vma->node))2129 return NULL;2130 2131 if (i915_vma_is_pinned(vma) ||2132 &vma->obj->mm.rsgt->table != vma->resource->bi.pages)2133 return ERR_PTR(-EAGAIN);2134 2135 /*2136 * We probably need to replace this with awaiting the fences of the2137 * object's dma_resv when the vma active goes away. When doing that2138 * we need to be careful to not add the vma_resource unbind fence2139 * immediately to the object's dma_resv, because then unbinding2140 * the next vma from the object, in case there are many, will2141 * actually await the unbinding of the previous vmas, which is2142 * undesirable.2143 */2144 if (i915_sw_fence_await_active(&vma->resource->chain, &vma->active,2145 I915_ACTIVE_AWAIT_EXCL |2146 I915_ACTIVE_AWAIT_ACTIVE) < 0) {2147 return ERR_PTR(-EBUSY);2148 }2149 2150 fence = __i915_vma_evict(vma, true);2151 2152 drm_mm_remove_node(&vma->node); /* pairs with i915_vma_release() */2153 2154 return fence;2155}2156 2157int i915_vma_unbind(struct i915_vma *vma)2158{2159 struct i915_address_space *vm = vma->vm;2160 intel_wakeref_t wakeref = 0;2161 int err;2162 2163 assert_object_held_shared(vma->obj);2164 2165 /* Optimistic wait before taking the mutex */2166 err = i915_vma_sync(vma);2167 if (err)2168 return err;2169 2170 if (!drm_mm_node_allocated(&vma->node))2171 return 0;2172 2173 if (i915_vma_is_pinned(vma)) {2174 vma_print_allocator(vma, "is pinned");2175 return -EAGAIN;2176 }2177 2178 if (i915_vma_is_bound(vma, I915_VMA_GLOBAL_BIND))2179 /* XXX not always required: nop_clear_range */2180 wakeref = intel_runtime_pm_get(&vm->i915->runtime_pm);2181 2182 err = mutex_lock_interruptible_nested(&vma->vm->mutex, !wakeref);2183 if (err)2184 goto out_rpm;2185 2186 err = __i915_vma_unbind(vma);2187 mutex_unlock(&vm->mutex);2188 2189out_rpm:2190 if (wakeref)2191 intel_runtime_pm_put(&vm->i915->runtime_pm, wakeref);2192 return err;2193}2194 2195int i915_vma_unbind_async(struct i915_vma *vma, bool trylock_vm)2196{2197 struct drm_i915_gem_object *obj = vma->obj;2198 struct i915_address_space *vm = vma->vm;2199 intel_wakeref_t wakeref = 0;2200 struct dma_fence *fence;2201 int err;2202 2203 /*2204 * We need the dma-resv lock since we add the2205 * unbind fence to the dma-resv object.2206 */2207 assert_object_held(obj);2208 2209 if (!drm_mm_node_allocated(&vma->node))2210 return 0;2211 2212 if (i915_vma_is_pinned(vma)) {2213 vma_print_allocator(vma, "is pinned");2214 return -EAGAIN;2215 }2216 2217 if (!obj->mm.rsgt)2218 return -EBUSY;2219 2220 err = dma_resv_reserve_fences(obj->base.resv, 2);2221 if (err)2222 return -EBUSY;2223 2224 /*2225 * It would be great if we could grab this wakeref from the2226 * async unbind work if needed, but we can't because it uses2227 * kmalloc and it's in the dma-fence signalling critical path.2228 */2229 if (i915_vma_is_bound(vma, I915_VMA_GLOBAL_BIND))2230 wakeref = intel_runtime_pm_get(&vm->i915->runtime_pm);2231 2232 if (trylock_vm && !mutex_trylock(&vm->mutex)) {2233 err = -EBUSY;2234 goto out_rpm;2235 } else if (!trylock_vm) {2236 err = mutex_lock_interruptible_nested(&vm->mutex, !wakeref);2237 if (err)2238 goto out_rpm;2239 }2240 2241 fence = __i915_vma_unbind_async(vma);2242 mutex_unlock(&vm->mutex);2243 if (IS_ERR_OR_NULL(fence)) {2244 err = PTR_ERR_OR_ZERO(fence);2245 goto out_rpm;2246 }2247 2248 dma_resv_add_fence(obj->base.resv, fence, DMA_RESV_USAGE_READ);2249 dma_fence_put(fence);2250 2251out_rpm:2252 if (wakeref)2253 intel_runtime_pm_put(&vm->i915->runtime_pm, wakeref);2254 return err;2255}2256 2257int i915_vma_unbind_unlocked(struct i915_vma *vma)2258{2259 int err;2260 2261 i915_gem_object_lock(vma->obj, NULL);2262 err = i915_vma_unbind(vma);2263 i915_gem_object_unlock(vma->obj);2264 2265 return err;2266}2267 2268struct i915_vma *i915_vma_make_unshrinkable(struct i915_vma *vma)2269{2270 i915_gem_object_make_unshrinkable(vma->obj);2271 return vma;2272}2273 2274void i915_vma_make_shrinkable(struct i915_vma *vma)2275{2276 i915_gem_object_make_shrinkable(vma->obj);2277}2278 2279void i915_vma_make_purgeable(struct i915_vma *vma)2280{2281 i915_gem_object_make_purgeable(vma->obj);2282}2283 2284#if IS_ENABLED(CONFIG_DRM_I915_SELFTEST)2285#include "selftests/i915_vma.c"2286#endif2287 2288void i915_vma_module_exit(void)2289{2290 kmem_cache_destroy(slab_vmas);2291}2292 2293int __init i915_vma_module_init(void)2294{2295 slab_vmas = KMEM_CACHE(i915_vma, SLAB_HWCACHE_ALIGN);2296 if (!slab_vmas)2297 return -ENOMEM;2298 2299 return 0;2300}2301