| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Thomas Hellstrom | 3557 | 40.80% | 24 | 12.83% |
| Christian König | 2786 | 31.96% | 69 | 36.90% |
| Jérôme Glisse | 726 | 8.33% | 8 | 4.28% |
| Maarten Lankhorst | 319 | 3.66% | 11 | 5.88% |
| Huang Rui | 180 | 2.06% | 1 | 0.53% |
| Ben Skeggs | 175 | 2.01% | 6 | 3.21% |
| Gerd Hoffmann | 159 | 1.82% | 6 | 3.21% |
| Roger He | 139 | 1.59% | 9 | 4.81% |
| Nicolai Hähnle | 135 | 1.55% | 3 | 1.60% |
| Joe Perches | 98 | 1.12% | 2 | 1.07% |
| Michel Dänzer | 94 | 1.08% | 5 | 2.67% |
| Matthew Garrett | 70 | 0.80% | 1 | 0.53% |
| Dave Airlie | 48 | 0.55% | 8 | 4.28% |
| Chunming Zhou | 41 | 0.47% | 1 | 0.53% |
| Thomas Zimmermann | 26 | 0.30% | 2 | 1.07% |
| David Herrmann | 25 | 0.29% | 4 | 2.14% |
| Felix Kuhling | 25 | 0.29% | 5 | 2.67% |
| Tom St Denis | 21 | 0.24% | 1 | 0.53% |
| Luca Barbieri | 18 | 0.21% | 1 | 0.53% |
| John Brooks | 13 | 0.15% | 1 | 0.53% |
| Chris Wilson | 10 | 0.11% | 1 | 0.53% |
| Roel Kluin | 10 | 0.11% | 1 | 0.53% |
| Gustavo A. R. Silva | 10 | 0.11% | 1 | 0.53% |
| Lin Yi | 7 | 0.08% | 1 | 0.53% |
| Sinclair Yeh | 5 | 0.06% | 1 | 0.53% |
| David Howells | 3 | 0.03% | 1 | 0.53% |
| Robert P. J. Day | 3 | 0.03% | 1 | 0.53% |
| Peter Zijlstra | 3 | 0.03% | 1 | 0.53% |
| Marek Olšák | 2 | 0.02% | 1 | 0.53% |
| Emese Revfy | 1 | 0.01% | 1 | 0.53% |
| Monk Liu | 1 | 0.01% | 1 | 0.53% |
| Martin Kepplinger | 1 | 0.01% | 1 | 0.53% |
| Tejun Heo | 1 | 0.01% | 1 | 0.53% |
| Alex Deucher | 1 | 0.01% | 1 | 0.53% |
| Jan Engelhardt | 1 | 0.01% | 1 | 0.53% |
| Flora Cui | 1 | 0.01% | 1 | 0.53% |
| Arun Sharma | 1 | 0.01% | 1 | 0.53% |
| Rashika Kheria | 1 | 0.01% | 1 | 0.53% |
| Dirk Hohndel | 1 | 0.01% | 1 | 0.53% |
| Total | 8718 | 187 |
/* SPDX-License-Identifier: GPL-2.0 OR MIT */ /************************************************************************** * * Copyright (c) 2006-2009 VMware, Inc., Palo Alto, CA., USA * All Rights Reserved. * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sub license, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice (including the * next paragraph) shall be included in all copies or substantial portions * of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE * USE OR OTHER DEALINGS IN THE SOFTWARE. * **************************************************************************/ /* * Authors: Thomas Hellstrom <thellstrom-at-vmware-dot-com> */ #define pr_fmt(fmt) "[TTM] " fmt #include <drm/ttm/ttm_module.h> #include <drm/ttm/ttm_bo_driver.h> #include <drm/ttm/ttm_placement.h> #include <linux/jiffies.h> #include <linux/slab.h> #include <linux/sched.h> #include <linux/mm.h> #include <linux/file.h> #include <linux/module.h> #include <linux/atomic.h> #include <linux/dma-resv.h> static void ttm_bo_global_kobj_release(struct kobject *kobj); /** * ttm_global_mutex - protecting the global BO state */ DEFINE_MUTEX(ttm_global_mutex); unsigned ttm_bo_glob_use_count; struct ttm_bo_global ttm_bo_glob; EXPORT_SYMBOL(ttm_bo_glob); static struct attribute ttm_bo_count = { .name = "bo_count", .mode = S_IRUGO }; /* default destructor */ static void ttm_bo_default_destroy(struct ttm_buffer_object *bo) { kfree(bo); } static inline int ttm_mem_type_from_place(const struct ttm_place *place, uint32_t *mem_type) { int pos; pos = ffs(place->flags & TTM_PL_MASK_MEM); if (unlikely(!pos)) return -EINVAL; *mem_type = pos - 1; return 0; } static void ttm_mem_type_debug(struct ttm_bo_device *bdev, struct drm_printer *p, int mem_type) { struct ttm_mem_type_manager *man = &bdev->man[mem_type]; drm_printf(p, " has_type: %d\n", man->has_type); drm_printf(p, " use_type: %d\n", man->use_type); drm_printf(p, " flags: 0x%08X\n", man->flags); drm_printf(p, " gpu_offset: 0x%08llX\n", man->gpu_offset); drm_printf(p, " size: %llu\n", man->size); drm_printf(p, " available_caching: 0x%08X\n", man->available_caching); drm_printf(p, " default_caching: 0x%08X\n", man->default_caching); if (mem_type != TTM_PL_SYSTEM) (*man->func->debug)(man, p); } static void ttm_bo_mem_space_debug(struct ttm_buffer_object *bo, struct ttm_placement *placement) { struct drm_printer p = drm_debug_printer(TTM_PFX); int i, ret, mem_type; drm_printf(&p, "No space for %p (%lu pages, %luK, %luM)\n", bo, bo->mem.num_pages, bo->mem.size >> 10, bo->mem.size >> 20); for (i = 0; i < placement->num_placement; i++) { ret = ttm_mem_type_from_place(&placement->placement[i], &mem_type); if (ret) return; drm_printf(&p, " placement[%d]=0x%08X (%d)\n", i, placement->placement[i].flags, mem_type); ttm_mem_type_debug(bo->bdev, &p, mem_type); } } static ssize_t ttm_bo_global_show(struct kobject *kobj, struct attribute *attr, char *buffer) { struct ttm_bo_global *glob = container_of(kobj, struct ttm_bo_global, kobj); return snprintf(buffer, PAGE_SIZE, "%d\n", atomic_read(&glob->bo_count)); } static struct attribute *ttm_bo_global_attrs[] = { &ttm_bo_count, NULL }; static const struct sysfs_ops ttm_bo_global_ops = { .show = &ttm_bo_global_show }; static struct kobj_type ttm_bo_glob_kobj_type = { .release = &ttm_bo_global_kobj_release, .sysfs_ops = &ttm_bo_global_ops, .default_attrs = ttm_bo_global_attrs }; static inline uint32_t ttm_bo_type_flags(unsigned type) { return 1 << (type); } static void ttm_bo_add_mem_to_lru(struct ttm_buffer_object *bo, struct ttm_mem_reg *mem) { struct ttm_bo_device *bdev = bo->bdev; struct ttm_mem_type_manager *man; if (!list_empty(&bo->lru)) return; if (mem->placement & TTM_PL_FLAG_NO_EVICT) return; man = &bdev->man[mem->mem_type]; list_add_tail(&bo->lru, &man->lru[bo->priority]); if (!(man->flags & TTM_MEMTYPE_FLAG_FIXED) && bo->ttm && !(bo->ttm->page_flags & (TTM_PAGE_FLAG_SG | TTM_PAGE_FLAG_SWAPPED))) { list_add_tail(&bo->swap, &ttm_bo_glob.swap_lru[bo->priority]); } } static void ttm_bo_del_from_lru(struct ttm_buffer_object *bo) { struct ttm_bo_device *bdev = bo->bdev; bool notify = false; if (!list_empty(&bo->swap)) { list_del_init(&bo->swap); notify = true; } if (!list_empty(&bo->lru)) { list_del_init(&bo->lru); notify = true; } if (notify && bdev->driver->del_from_lru_notify) bdev->driver->del_from_lru_notify(bo); } static void ttm_bo_bulk_move_set_pos(struct ttm_lru_bulk_move_pos *pos, struct ttm_buffer_object *bo) { if (!pos->first) pos->first = bo; pos->last = bo; } void ttm_bo_move_to_lru_tail(struct ttm_buffer_object *bo, struct ttm_lru_bulk_move *bulk) { dma_resv_assert_held(bo->base.resv); ttm_bo_del_from_lru(bo); ttm_bo_add_mem_to_lru(bo, &bo->mem); if (bulk && !(bo->mem.placement & TTM_PL_FLAG_NO_EVICT)) { switch (bo->mem.mem_type) { case TTM_PL_TT: ttm_bo_bulk_move_set_pos(&bulk->tt[bo->priority], bo); break; case TTM_PL_VRAM: ttm_bo_bulk_move_set_pos(&bulk->vram[bo->priority], bo); break; } if (bo->ttm && !(bo->ttm->page_flags & (TTM_PAGE_FLAG_SG | TTM_PAGE_FLAG_SWAPPED))) ttm_bo_bulk_move_set_pos(&bulk->swap[bo->priority], bo); } } EXPORT_SYMBOL(ttm_bo_move_to_lru_tail); void ttm_bo_bulk_move_lru_tail(struct ttm_lru_bulk_move *bulk) { unsigned i; for (i = 0; i < TTM_MAX_BO_PRIORITY; ++i) { struct ttm_lru_bulk_move_pos *pos = &bulk->tt[i]; struct ttm_mem_type_manager *man; if (!pos->first) continue; dma_resv_assert_held(pos->first->base.resv); dma_resv_assert_held(pos->last->base.resv); man = &pos->first->bdev->man[TTM_PL_TT]; list_bulk_move_tail(&man->lru[i], &pos->first->lru, &pos->last->lru); } for (i = 0; i < TTM_MAX_BO_PRIORITY; ++i) { struct ttm_lru_bulk_move_pos *pos = &bulk->vram[i]; struct ttm_mem_type_manager *man; if (!pos->first) continue; dma_resv_assert_held(pos->first->base.resv); dma_resv_assert_held(pos->last->base.resv); man = &pos->first->bdev->man[TTM_PL_VRAM]; list_bulk_move_tail(&man->lru[i], &pos->first->lru, &pos->last->lru); } for (i = 0; i < TTM_MAX_BO_PRIORITY; ++i) { struct ttm_lru_bulk_move_pos *pos = &bulk->swap[i]; struct list_head *lru; if (!pos->first) continue; dma_resv_assert_held(pos->first->base.resv); dma_resv_assert_held(pos->last->base.resv); lru = &ttm_bo_glob.swap_lru[i]; list_bulk_move_tail(lru, &pos->first->swap, &pos->last->swap); } } EXPORT_SYMBOL(ttm_bo_bulk_move_lru_tail); static int ttm_bo_handle_move_mem(struct ttm_buffer_object *bo, struct ttm_mem_reg *mem, bool evict, struct ttm_operation_ctx *ctx) { struct ttm_bo_device *bdev = bo->bdev; bool old_is_pci = ttm_mem_reg_is_pci(bdev, &bo->mem); bool new_is_pci = ttm_mem_reg_is_pci(bdev, mem); struct ttm_mem_type_manager *old_man = &bdev->man[bo->mem.mem_type]; struct ttm_mem_type_manager *new_man = &bdev->man[mem->mem_type]; int ret = 0; if (old_is_pci || new_is_pci || ((mem->placement & bo->mem.placement & TTM_PL_MASK_CACHING) == 0)) { ret = ttm_mem_io_lock(old_man, true); if (unlikely(ret != 0)) goto out_err; ttm_bo_unmap_virtual_locked(bo); ttm_mem_io_unlock(old_man); } /* * Create and bind a ttm if required. */ if (!(new_man->flags & TTM_MEMTYPE_FLAG_FIXED)) { if (bo->ttm == NULL) { bool zero = !(old_man->flags & TTM_MEMTYPE_FLAG_FIXED); ret = ttm_tt_create(bo, zero); if (ret) goto out_err; } ret = ttm_tt_set_placement_caching(bo->ttm, mem->placement); if (ret) goto out_err; if (mem->mem_type != TTM_PL_SYSTEM) { ret = ttm_tt_bind(bo->ttm, mem, ctx); if (ret) goto out_err; } if (bo->mem.mem_type == TTM_PL_SYSTEM) { if (bdev->driver->move_notify) bdev->driver->move_notify(bo, evict, mem); bo->mem = *mem; mem->mm_node = NULL; goto moved; } } if (bdev->driver->move_notify) bdev->driver->move_notify(bo, evict, mem); if (!(old_man->flags & TTM_MEMTYPE_FLAG_FIXED) && !(new_man->flags & TTM_MEMTYPE_FLAG_FIXED)) ret = ttm_bo_move_ttm(bo, ctx, mem); else if (bdev->driver->move) ret = bdev->driver->move(bo, evict, ctx, mem); else ret = ttm_bo_move_memcpy(bo, ctx, mem); if (ret) { if (bdev->driver->move_notify) { swap(*mem, bo->mem); bdev->driver->move_notify(bo, false, mem); swap(*mem, bo->mem); } goto out_err; } moved: bo->evicted = false; if (bo->mem.mm_node) bo->offset = (bo->mem.start << PAGE_SHIFT) + bdev->man[bo->mem.mem_type].gpu_offset; else bo->offset = 0; ctx->bytes_moved += bo->num_pages << PAGE_SHIFT; return 0; out_err: new_man = &bdev->man[bo->mem.mem_type]; if (new_man->flags & TTM_MEMTYPE_FLAG_FIXED) { ttm_tt_destroy(bo->ttm); bo->ttm = NULL; } return ret; } /** * Call bo::reserved. * Will release GPU memory type usage on destruction. * This is the place to put in driver specific hooks to release * driver private resources. * Will release the bo::reserved lock. */ static void ttm_bo_cleanup_memtype_use(struct ttm_buffer_object *bo) { if (bo->bdev->driver->move_notify) bo->bdev->driver->move_notify(bo, false, NULL); ttm_tt_destroy(bo->ttm); bo->ttm = NULL; ttm_bo_mem_put(bo, &bo->mem); } static int ttm_bo_individualize_resv(struct ttm_buffer_object *bo) { int r; if (bo->base.resv == &bo->base._resv) return 0; BUG_ON(!dma_resv_trylock(&bo->base._resv)); r = dma_resv_copy_fences(&bo->base._resv, bo->base.resv); dma_resv_unlock(&bo->base._resv); if (r) return r; if (bo->type != ttm_bo_type_sg) { /* This works because the BO is about to be destroyed and nobody * reference it any more. The only tricky case is the trylock on * the resv object while holding the lru_lock. */ spin_lock(&ttm_bo_glob.lru_lock); bo->base.resv = &bo->base._resv; spin_unlock(&ttm_bo_glob.lru_lock); } return r; } static void ttm_bo_flush_all_fences(struct ttm_buffer_object *bo) { struct dma_resv *resv = &bo->base._resv; struct dma_resv_list *fobj; struct dma_fence *fence; int i; rcu_read_lock(); fobj = rcu_dereference(resv->fence); fence = rcu_dereference(resv->fence_excl); if (fence && !fence->ops->signaled) dma_fence_enable_sw_signaling(fence); for (i = 0; fobj && i < fobj->shared_count; ++i) { fence = rcu_dereference(fobj->shared[i]); if (!fence->ops->signaled) dma_fence_enable_sw_signaling(fence); } rcu_read_unlock(); } /** * function ttm_bo_cleanup_refs * If bo idle, remove from lru lists, and unref. * If not idle, block if possible. * * Must be called with lru_lock and reservation held, this function * will drop the lru lock and optionally the reservation lock before returning. * * @interruptible Any sleeps should occur interruptibly. * @no_wait_gpu Never wait for gpu. Return -EBUSY instead. * @unlock_resv Unlock the reservation lock as well. */ static int ttm_bo_cleanup_refs(struct ttm_buffer_object *bo, bool interruptible, bool no_wait_gpu, bool unlock_resv) { struct dma_resv *resv = &bo->base._resv; int ret; if (dma_resv_test_signaled_rcu(resv, true)) ret = 0; else ret = -EBUSY; if (ret && !no_wait_gpu) { long lret; if (unlock_resv) dma_resv_unlock(bo->base.resv); spin_unlock(&ttm_bo_glob.lru_lock); lret = dma_resv_wait_timeout_rcu(resv, true, interruptible, 30 * HZ); if (lret < 0) return lret; else if (lret == 0) return -EBUSY; spin_lock(&ttm_bo_glob.lru_lock); if (unlock_resv && !dma_resv_trylock(bo->base.resv)) { /* * We raced, and lost, someone else holds the reservation now, * and is probably busy in ttm_bo_cleanup_memtype_use. * * Even if it's not the case, because we finished waiting any * delayed destruction would succeed, so just return success * here. */ spin_unlock(&ttm_bo_glob.lru_lock); return 0; } ret = 0; } if (ret || unlikely(list_empty(&bo->ddestroy))) { if (unlock_resv) dma_resv_unlock(bo->base.resv); spin_unlock(&ttm_bo_glob.lru_lock); return ret; } ttm_bo_del_from_lru(bo); list_del_init(&bo->ddestroy); spin_unlock(&ttm_bo_glob.lru_lock); ttm_bo_cleanup_memtype_use(bo); if (unlock_resv) dma_resv_unlock(bo->base.resv); ttm_bo_put(bo); return 0; } /** * Traverse the delayed list, and call ttm_bo_cleanup_refs on all * encountered buffers. */ static bool ttm_bo_delayed_delete(struct ttm_bo_device *bdev, bool remove_all) { struct ttm_bo_global *glob = &ttm_bo_glob; struct list_head removed; bool empty; INIT_LIST_HEAD(&removed); spin_lock(&glob->lru_lock); while (!list_empty(&bdev->ddestroy)) { struct ttm_buffer_object *bo; bo = list_first_entry(&bdev->ddestroy, struct ttm_buffer_object, ddestroy); list_move_tail(&bo->ddestroy, &removed); if (!ttm_bo_get_unless_zero(bo)) continue; if (remove_all || bo->base.resv != &bo->base._resv) { spin_unlock(&glob->lru_lock); dma_resv_lock(bo->base.resv, NULL); spin_lock(&glob->lru_lock); ttm_bo_cleanup_refs(bo, false, !remove_all, true); } else if (dma_resv_trylock(bo->base.resv)) { ttm_bo_cleanup_refs(bo, false, !remove_all, true); } else { spin_unlock(&glob->lru_lock); } ttm_bo_put(bo); spin_lock(&glob->lru_lock); } list_splice_tail(&removed, &bdev->ddestroy); empty = list_empty(&bdev->ddestroy); spin_unlock(&glob->lru_lock); return empty; } static void ttm_bo_delayed_workqueue(struct work_struct *work) { struct ttm_bo_device *bdev = container_of(work, struct ttm_bo_device, wq.work); if (!ttm_bo_delayed_delete(bdev, false)) schedule_delayed_work(&bdev->wq, ((HZ / 100) < 1) ? 1 : HZ / 100); } static void ttm_bo_release(struct kref *kref) { struct ttm_buffer_object *bo = container_of(kref, struct ttm_buffer_object, kref); struct ttm_bo_device *bdev = bo->bdev; struct ttm_mem_type_manager *man = &bdev->man[bo->mem.mem_type]; size_t acc_size = bo->acc_size; int ret; if (!bo->deleted) { ret = ttm_bo_individualize_resv(bo); if (ret) { /* Last resort, if we fail to allocate memory for the * fences block for the BO to become idle */ dma_resv_wait_timeout_rcu(bo->base.resv, true, false, 30 * HZ); } if (bo->bdev->driver->release_notify) bo->bdev->driver->release_notify(bo); drm_vma_offset_remove(bdev->vma_manager, &bo->base.vma_node); ttm_mem_io_lock(man, false); ttm_mem_io_free_vm(bo); ttm_mem_io_unlock(man); } if (!dma_resv_test_signaled_rcu(bo->base.resv, true)) { /* The BO is not idle, resurrect it for delayed destroy */ ttm_bo_flush_all_fences(bo); bo->deleted = true; spin_lock(&ttm_bo_glob.lru_lock); /* * Make NO_EVICT bos immediately available to * shrinkers, now that they are queued for * destruction. */ if (bo->mem.placement & TTM_PL_FLAG_NO_EVICT) { bo->mem.placement &= ~TTM_PL_FLAG_NO_EVICT; ttm_bo_del_from_lru(bo); ttm_bo_add_mem_to_lru(bo, &bo->mem); } kref_init(&bo->kref); list_add_tail(&bo->ddestroy, &bdev->ddestroy); spin_unlock(&ttm_bo_glob.lru_lock); schedule_delayed_work(&bdev->wq, ((HZ / 100) < 1) ? 1 : HZ / 100); return; } spin_lock(&ttm_bo_glob.lru_lock); ttm_bo_del_from_lru(bo); list_del(&bo->ddestroy); spin_unlock(&ttm_bo_glob.lru_lock); ttm_bo_cleanup_memtype_use(bo); BUG_ON(bo->mem.mm_node != NULL); atomic_dec(&ttm_bo_glob.bo_count); dma_fence_put(bo->moving); if (!ttm_bo_uses_embedded_gem_object(bo)) dma_resv_fini(&bo->base._resv); bo->destroy(bo); ttm_mem_global_free(&ttm_mem_glob, acc_size); } void ttm_bo_put(struct ttm_buffer_object *bo) { kref_put(&bo->kref, ttm_bo_release); } EXPORT_SYMBOL(ttm_bo_put); int ttm_bo_lock_delayed_workqueue(struct ttm_bo_device *bdev) { return cancel_delayed_work_sync(&bdev->wq); } EXPORT_SYMBOL(ttm_bo_lock_delayed_workqueue); void ttm_bo_unlock_delayed_workqueue(struct ttm_bo_device *bdev, int resched) { if (resched) schedule_delayed_work(&bdev->wq, ((HZ / 100) < 1) ? 1 : HZ / 100); } EXPORT_SYMBOL(ttm_bo_unlock_delayed_workqueue); static int ttm_bo_evict(struct ttm_buffer_object *bo, struct ttm_operation_ctx *ctx) { struct ttm_bo_device *bdev = bo->bdev; struct ttm_mem_reg evict_mem; struct ttm_placement placement; int ret = 0; dma_resv_assert_held(bo->base.resv); placement.num_placement = 0; placement.num_busy_placement = 0; bdev->driver->evict_flags(bo, &placement); if (!placement.num_placement && !placement.num_busy_placement) { ret = ttm_bo_pipeline_gutting(bo); if (ret) return ret; return ttm_tt_create(bo, false); } evict_mem = bo->mem; evict_mem.mm_node = NULL; evict_mem.bus.io_reserved_vm = false; evict_mem.bus.io_reserved_count = 0; ret = ttm_bo_mem_space(bo, &placement, &evict_mem, ctx); if (ret) { if (ret != -ERESTARTSYS) { pr_err("Failed to find memory space for buffer 0x%p eviction\n", bo); ttm_bo_mem_space_debug(bo, &placement); } goto out; } ret = ttm_bo_handle_move_mem(bo, &evict_mem, true, ctx); if (unlikely(ret)) { if (ret != -ERESTARTSYS) pr_err("Buffer eviction failed\n"); ttm_bo_mem_put(bo, &evict_mem); goto out; } bo->evicted = true; out: return ret; } bool ttm_bo_eviction_valuable(struct ttm_buffer_object *bo, const struct ttm_place *place) { /* Don't evict this BO if it's outside of the * requested placement range */ if (place->fpfn >= (bo->mem.start + bo->mem.size) || (place->lpfn && place->lpfn <= bo->mem.start)) return false; return true; } EXPORT_SYMBOL(ttm_bo_eviction_valuable); /** * Check the target bo is allowable to be evicted or swapout, including cases: * * a. if share same reservation object with ctx->resv, have assumption * reservation objects should already be locked, so not lock again and * return true directly when either the opreation allow_reserved_eviction * or the target bo already is in delayed free list; * * b. Otherwise, trylock it. */ static bool ttm_bo_evict_swapout_allowable(struct ttm_buffer_object *bo, struct ttm_operation_ctx *ctx, bool *locked, bool *busy) { bool ret = false; if (bo->base.resv == ctx->resv) { dma_resv_assert_held(bo->base.resv); if (ctx->flags & TTM_OPT_FLAG_ALLOW_RES_EVICT) ret = true; *locked = false; if (busy) *busy = false; } else { ret = dma_resv_trylock(bo->base.resv); *locked = ret; if (busy) *busy = !ret; } return ret; } /** * ttm_mem_evict_wait_busy - wait for a busy BO to become available * * @busy_bo: BO which couldn't be locked with trylock * @ctx: operation context * @ticket: acquire ticket * * Try to lock a busy buffer object to avoid failing eviction. */ static int ttm_mem_evict_wait_busy(struct ttm_buffer_object *busy_bo, struct ttm_operation_ctx *ctx, struct ww_acquire_ctx *ticket) { int r; if (!busy_bo || !ticket) return -EBUSY; if (ctx->interruptible) r = dma_resv_lock_interruptible(busy_bo->base.resv, ticket); else r = dma_resv_lock(busy_bo->base.resv, ticket); /* * TODO: It would be better to keep the BO locked until allocation is at * least tried one more time, but that would mean a much larger rework * of TTM. */ if (!r) dma_resv_unlock(busy_bo->base.resv); return r == -EDEADLK ? -EBUSY : r; } static int ttm_mem_evict_first(struct ttm_bo_device *bdev, uint32_t mem_type, const struct ttm_place *place, struct ttm_operation_ctx *ctx, struct ww_acquire_ctx *ticket) { struct ttm_buffer_object *bo = NULL, *busy_bo = NULL; struct ttm_mem_type_manager *man = &bdev->man[mem_type]; bool locked = false; unsigned i; int ret; spin_lock(&ttm_bo_glob.lru_lock); for (i = 0; i < TTM_MAX_BO_PRIORITY; ++i) { list_for_each_entry(bo, &man->lru[i], lru) { bool busy; if (!ttm_bo_evict_swapout_allowable(bo, ctx, &locked, &busy)) { if (busy && !busy_bo && ticket != dma_resv_locking_ctx(bo->base.resv)) busy_bo = bo; continue; } if (place && !bdev->driver->eviction_valuable(bo, place)) { if (locked) dma_resv_unlock(bo->base.resv); continue; } if (!ttm_bo_get_unless_zero(bo)) { if (locked) dma_resv_unlock(bo->base.resv); continue; } break; } /* If the inner loop terminated early, we have our candidate */ if (&bo->lru != &man->lru[i]) break; bo = NULL; } if (!bo) { if (busy_bo && !ttm_bo_get_unless_zero(busy_bo)) busy_bo = NULL; spin_unlock(&ttm_bo_glob.lru_lock); ret = ttm_mem_evict_wait_busy(busy_bo, ctx, ticket); if (busy_bo) ttm_bo_put(busy_bo); return ret; } if (bo->deleted) { ret = ttm_bo_cleanup_refs(bo, ctx->interruptible, ctx->no_wait_gpu, locked); ttm_bo_put(bo); return ret; } spin_unlock(&ttm_bo_glob.lru_lock); ret = ttm_bo_evict(bo, ctx); if (locked) ttm_bo_unreserve(bo); ttm_bo_put(bo); return ret; } void ttm_bo_mem_put(struct ttm_buffer_object *bo, struct ttm_mem_reg *mem) { struct ttm_mem_type_manager *man = &bo->bdev->man[mem->mem_type]; if (mem->mm_node) (*man->func->put_node)(man, mem); } EXPORT_SYMBOL(ttm_bo_mem_put); /** * Add the last move fence to the BO and reserve a new shared slot. */ static int ttm_bo_add_move_fence(struct ttm_buffer_object *bo, struct ttm_mem_type_manager *man, struct ttm_mem_reg *mem, bool no_wait_gpu) { struct dma_fence *fence; int ret; spin_lock(&man->move_lock); fence = dma_fence_get(man->move); spin_unlock(&man->move_lock); if (!fence) return 0; if (no_wait_gpu) return -EBUSY; dma_resv_add_shared_fence(bo->base.resv, fence); ret = dma_resv_reserve_shared(bo->base.resv, 1); if (unlikely(ret)) { dma_fence_put(fence); return ret; } dma_fence_put(bo->moving); bo->moving = fence; return 0; } /** * Repeatedly evict memory from the LRU for @mem_type until we create enough * space, or we've evicted everything and there isn't enough space. */ static int ttm_bo_mem_force_space(struct ttm_buffer_object *bo, const struct ttm_place *place, struct ttm_mem_reg *mem, struct ttm_operation_ctx *ctx) { struct ttm_bo_device *bdev = bo->bdev; struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type]; struct ww_acquire_ctx *ticket; int ret; ticket = dma_resv_locking_ctx(bo->base.resv); do { ret = (*man->func->get_node)(man, bo, place, mem); if (unlikely(ret != 0)) return ret; if (mem->mm_node) break; ret = ttm_mem_evict_first(bdev, mem->mem_type, place, ctx, ticket); if (unlikely(ret != 0)) return ret; } while (1); return ttm_bo_add_move_fence(bo, man, mem, ctx->no_wait_gpu); } static uint32_t ttm_bo_select_caching(struct ttm_mem_type_manager *man, uint32_t cur_placement, uint32_t proposed_placement) { uint32_t caching = proposed_placement & TTM_PL_MASK_CACHING; uint32_t result = proposed_placement & ~TTM_PL_MASK_CACHING; /** * Keep current caching if possible. */ if ((cur_placement & caching) != 0) result |= (cur_placement & caching); else if ((man->default_caching & caching) != 0) result |= man->default_caching; else if ((TTM_PL_FLAG_CACHED & caching) != 0) result |= TTM_PL_FLAG_CACHED; else if ((TTM_PL_FLAG_WC & caching) != 0) result |= TTM_PL_FLAG_WC; else if ((TTM_PL_FLAG_UNCACHED & caching) != 0) result |= TTM_PL_FLAG_UNCACHED; return result; } static bool ttm_bo_mt_compatible(struct ttm_mem_type_manager *man, uint32_t mem_type, const struct ttm_place *place, uint32_t *masked_placement) { uint32_t cur_flags = ttm_bo_type_flags(mem_type); if ((cur_flags & place->flags & TTM_PL_MASK_MEM) == 0) return false; if ((place->flags & man->available_caching) == 0) return false; cur_flags |= (place->flags & man->available_caching); *masked_placement = cur_flags; return true; } /** * ttm_bo_mem_placement - check if placement is compatible * @bo: BO to find memory for * @place: where to search * @mem: the memory object to fill in * @ctx: operation context * * Check if placement is compatible and fill in mem structure. * Returns -EBUSY if placement won't work or negative error code. * 0 when placement can be used. */ static int ttm_bo_mem_placement(struct ttm_buffer_object *bo, const struct ttm_place *place, struct ttm_mem_reg *mem, struct ttm_operation_ctx *ctx) { struct ttm_bo_device *bdev = bo->bdev; uint32_t mem_type = TTM_PL_SYSTEM; struct ttm_mem_type_manager *man; uint32_t cur_flags = 0; int ret; ret = ttm_mem_type_from_place(place, &mem_type); if (ret) return ret; man = &bdev->man[mem_type]; if (!man->has_type || !man->use_type) return -EBUSY; if (!ttm_bo_mt_compatible(man, mem_type, place, &cur_flags)) return -EBUSY; cur_flags = ttm_bo_select_caching(man, bo->mem.placement, cur_flags); /* * Use the access and other non-mapping-related flag bits from * the memory placement flags to the current flags */ ttm_flag_masked(&cur_flags, place->flags, ~TTM_PL_MASK_MEMTYPE); mem->mem_type = mem_type; mem->placement = cur_flags; spin_lock(&ttm_bo_glob.lru_lock); ttm_bo_del_from_lru(bo); ttm_bo_add_mem_to_lru(bo, mem); spin_unlock(&ttm_bo_glob.lru_lock); return 0; } /** * Creates space for memory region @mem according to its type. * * This function first searches for free space in compatible memory types in * the priority order defined by the driver. If free space isn't found, then * ttm_bo_mem_force_space is attempted in priority order to evict and find * space. */ int ttm_bo_mem_space(struct ttm_buffer_object *bo, struct ttm_placement *placement, struct ttm_mem_reg *mem, struct ttm_operation_ctx *ctx) { struct ttm_bo_device *bdev = bo->bdev; bool type_found = false; int i, ret; ret = dma_resv_reserve_shared(bo->base.resv, 1); if (unlikely(ret)) return ret; mem->mm_node = NULL; for (i = 0; i < placement->num_placement; ++i) { const struct ttm_place *place = &placement->placement[i]; struct ttm_mem_type_manager *man; ret = ttm_bo_mem_placement(bo, place, mem, ctx); if (ret == -EBUSY) continue; if (ret) goto error; type_found = true; mem->mm_node = NULL; if (mem->mem_type == TTM_PL_SYSTEM) return 0; man = &bdev->man[mem->mem_type]; ret = (*man->func->get_node)(man, bo, place, mem); if (unlikely(ret)) goto error; if (!mem->mm_node) continue; ret = ttm_bo_add_move_fence(bo, man, mem, ctx->no_wait_gpu); if (unlikely(ret)) { (*man->func->put_node)(man, mem); if (ret == -EBUSY) continue; goto error; } return 0; } for (i = 0; i < placement->num_busy_placement; ++i) { const struct ttm_place *place = &placement->busy_placement[i]; ret = ttm_bo_mem_placement(bo, place, mem, ctx); if (ret == -EBUSY) continue; if (ret) goto error; type_found = true; mem->mm_node = NULL; if (mem->mem_type == TTM_PL_SYSTEM) return 0; ret = ttm_bo_mem_force_space(bo, place, mem, ctx); if (ret == 0 && mem->mm_node) return 0; if (ret && ret != -EBUSY) goto error; } ret = -ENOMEM; if (!type_found) { pr_err(TTM_PFX "No compatible memory type found\n"); ret = -EINVAL; } error: if (bo->mem.mem_type == TTM_PL_SYSTEM && !list_empty(&bo->lru)) { spin_lock(&ttm_bo_glob.lru_lock); ttm_bo_move_to_lru_tail(bo, NULL); spin_unlock(&ttm_bo_glob.lru_lock); } return ret; } EXPORT_SYMBOL(ttm_bo_mem_space); static int ttm_bo_move_buffer(struct ttm_buffer_object *bo, struct ttm_placement *placement, struct ttm_operation_ctx *ctx) { int ret = 0; struct ttm_mem_reg mem; dma_resv_assert_held(bo->base.resv); mem.num_pages = bo->num_pages; mem.size = mem.num_pages << PAGE_SHIFT; mem.page_alignment = bo->mem.page_alignment; mem.bus.io_reserved_vm = false; mem.bus.io_reserved_count = 0; /* * Determine where to move the buffer. */ ret = ttm_bo_mem_space(bo, placement, &mem, ctx); if (ret) goto out_unlock; ret = ttm_bo_handle_move_mem(bo, &mem, false, ctx); out_unlock: if (ret && mem.mm_node) ttm_bo_mem_put(bo, &mem); return ret; } static bool ttm_bo_places_compat(const struct ttm_place *places, unsigned num_placement, struct ttm_mem_reg *mem, uint32_t *new_flags) { unsigned i; for (i = 0; i < num_placement; i++) { const struct ttm_place *heap = &places[i]; if (mem->mm_node && (mem->start < heap->fpfn || (heap->lpfn != 0 && (mem->start + mem->num_pages) > heap->lpfn))) continue; *new_flags = heap->flags; if ((*new_flags & mem->placement & TTM_PL_MASK_CACHING) && (*new_flags & mem->placement & TTM_PL_MASK_MEM) && (!(*new_flags & TTM_PL_FLAG_CONTIGUOUS) || (mem->placement & TTM_PL_FLAG_CONTIGUOUS))) return true; } return false; } bool ttm_bo_mem_compat(struct ttm_placement *placement, struct ttm_mem_reg *mem, uint32_t *new_flags) { if (ttm_bo_places_compat(placement->placement, placement->num_placement, mem, new_flags)) return true; if ((placement->busy_placement != placement->placement || placement->num_busy_placement > placement->num_placement) && ttm_bo_places_compat(placement->busy_placement, placement->num_busy_placement, mem, new_flags)) return true; return false; } EXPORT_SYMBOL(ttm_bo_mem_compat); int ttm_bo_validate(struct ttm_buffer_object *bo, struct ttm_placement *placement, struct ttm_operation_ctx *ctx) { int ret; uint32_t new_flags; dma_resv_assert_held(bo->base.resv); /* * Remove the backing store if no placement is given. */ if (!placement->num_placement && !placement->num_busy_placement) { ret = ttm_bo_pipeline_gutting(bo); if (ret) return ret; return ttm_tt_create(bo, false); } /* * Check whether we need to move buffer. */ if (!ttm_bo_mem_compat(placement, &bo->mem, &new_flags)) { ret = ttm_bo_move_buffer(bo, placement, ctx); if (ret) return ret; } else { /* * Use the access and other non-mapping-related flag bits from * the compatible memory placement flags to the active flags */ ttm_flag_masked(&bo->mem.placement, new_flags, ~TTM_PL_MASK_MEMTYPE); } /* * We might need to add a TTM. */ if (bo->mem.mem_type == TTM_PL_SYSTEM && bo->ttm == NULL) { ret = ttm_tt_create(bo, true); if (ret) return ret; } return 0; } EXPORT_SYMBOL(ttm_bo_validate); int ttm_bo_init_reserved(struct ttm_bo_device *bdev, struct ttm_buffer_object *bo, unsigned long size, enum ttm_bo_type type, struct ttm_placement *placement, uint32_t page_alignment, struct ttm_operation_ctx *ctx, size_t acc_size, struct sg_table *sg, struct dma_resv *resv, void (*destroy) (struct ttm_buffer_object *)) { struct ttm_mem_global *mem_glob = &ttm_mem_glob; int ret = 0; unsigned long num_pages; bool locked; ret = ttm_mem_global_alloc(mem_glob, acc_size, ctx); if (ret) { pr_err("Out of kernel memory\n"); if (destroy) (*destroy)(bo); else kfree(bo); return -ENOMEM; } num_pages = (size + PAGE_SIZE - 1) >> PAGE_SHIFT; if (num_pages == 0) { pr_err("Illegal buffer object size\n"); if (destroy) (*destroy)(bo); else kfree(bo); ttm_mem_global_free(mem_glob, acc_size); return -EINVAL; } bo->destroy = destroy ? destroy : ttm_bo_default_destroy; kref_init(&bo->kref); INIT_LIST_HEAD(&bo->lru); INIT_LIST_HEAD(&bo->ddestroy); INIT_LIST_HEAD(&bo->swap); INIT_LIST_HEAD(&bo->io_reserve_lru); bo->bdev = bdev; bo->type = type; bo->num_pages = num_pages; bo->mem.size = num_pages << PAGE_SHIFT; bo->mem.mem_type = TTM_PL_SYSTEM; bo->mem.num_pages = bo->num_pages; bo->mem.mm_node = NULL; bo->mem.page_alignment = page_alignment; bo->mem.bus.io_reserved_vm = false; bo->mem.bus.io_reserved_count = 0; bo->moving = NULL; bo->mem.placement = (TTM_PL_FLAG_SYSTEM | TTM_PL_FLAG_CACHED); bo->acc_size = acc_size; bo->sg = sg; if (resv) { bo->base.resv = resv; dma_resv_assert_held(bo->base.resv); } else { bo->base.resv = &bo->base._resv; } if (!ttm_bo_uses_embedded_gem_object(bo)) { /* * bo.gem is not initialized, so we have to setup the * struct elements we want use regardless. */ dma_resv_init(&bo->base._resv); drm_vma_node_reset(&bo->base.vma_node); } atomic_inc(&ttm_bo_glob.bo_count); /* * For ttm_bo_type_device buffers, allocate * address space from the device. */ if (bo->type == ttm_bo_type_device || bo->type == ttm_bo_type_sg) ret = drm_vma_offset_add(bdev->vma_manager, &bo->base.vma_node, bo->mem.num_pages); /* passed reservation objects should already be locked, * since otherwise lockdep will be angered in radeon. */ if (!resv) { locked = dma_resv_trylock(bo->base.resv); WARN_ON(!locked); } if (likely(!ret)) ret = ttm_bo_validate(bo, placement, ctx); if (unlikely(ret)) { if (!resv) ttm_bo_unreserve(bo); ttm_bo_put(bo); return ret; } spin_lock(&ttm_bo_glob.lru_lock); ttm_bo_move_to_lru_tail(bo, NULL); spin_unlock(&ttm_bo_glob.lru_lock); return ret; } EXPORT_SYMBOL(ttm_bo_init_reserved); int ttm_bo_init(struct ttm_bo_device *bdev, struct ttm_buffer_object *bo, unsigned long size, enum ttm_bo_type type, struct ttm_placement *placement, uint32_t page_alignment, bool interruptible, size_t acc_size, struct sg_table *sg, struct dma_resv *resv, void (*destroy) (struct ttm_buffer_object *)) { struct ttm_operation_ctx ctx = { interruptible, false }; int ret; ret = ttm_bo_init_reserved(bdev, bo, size, type, placement, page_alignment, &ctx, acc_size, sg, resv, destroy); if (ret) return ret; if (!resv) ttm_bo_unreserve(bo); return 0; } EXPORT_SYMBOL(ttm_bo_init); size_t ttm_bo_acc_size(struct ttm_bo_device *bdev, unsigned long bo_size, unsigned struct_size) { unsigned npages = (PAGE_ALIGN(bo_size)) >> PAGE_SHIFT; size_t size = 0; size += ttm_round_pot(struct_size); size += ttm_round_pot(npages * sizeof(void *)); size += ttm_round_pot(sizeof(struct ttm_tt)); return size; } EXPORT_SYMBOL(ttm_bo_acc_size); size_t ttm_bo_dma_acc_size(struct ttm_bo_device *bdev, unsigned long bo_size, unsigned struct_size) { unsigned npages = (PAGE_ALIGN(bo_size)) >> PAGE_SHIFT; size_t size = 0; size += ttm_round_pot(struct_size); size += ttm_round_pot(npages * (2*sizeof(void *) + sizeof(dma_addr_t))); size += ttm_round_pot(sizeof(struct ttm_dma_tt)); return size; } EXPORT_SYMBOL(ttm_bo_dma_acc_size); int ttm_bo_create(struct ttm_bo_device *bdev, unsigned long size, enum ttm_bo_type type, struct ttm_placement *placement, uint32_t page_alignment, bool interruptible, struct ttm_buffer_object **p_bo) { struct ttm_buffer_object *bo; size_t acc_size; int ret; bo = kzalloc(sizeof(*bo), GFP_KERNEL); if (unlikely(bo == NULL)) return -ENOMEM; acc_size = ttm_bo_acc_size(bdev, size, sizeof(struct ttm_buffer_object)); ret = ttm_bo_init(bdev, bo, size, type, placement, page_alignment, interruptible, acc_size, NULL, NULL, NULL); if (likely(ret == 0)) *p_bo = bo; return ret; } EXPORT_SYMBOL(ttm_bo_create); static int ttm_bo_force_list_clean(struct ttm_bo_device *bdev, unsigned mem_type) { struct ttm_operation_ctx ctx = { .interruptible = false, .no_wait_gpu = false, .flags = TTM_OPT_FLAG_FORCE_ALLOC }; struct ttm_mem_type_manager *man = &bdev->man[mem_type]; struct ttm_bo_global *glob = &ttm_bo_glob; struct dma_fence *fence; int ret; unsigned i; /* * Can't use standard list traversal since we're unlocking. */ spin_lock(&glob->lru_lock); for (i = 0; i < TTM_MAX_BO_PRIORITY; ++i) { while (!list_empty(&man->lru[i])) { spin_unlock(&glob->lru_lock); ret = ttm_mem_evict_first(bdev, mem_type, NULL, &ctx, NULL); if (ret) return ret; spin_lock(&glob->lru_lock); } } spin_unlock(&glob->lru_lock); spin_lock(&man->move_lock); fence = dma_fence_get(man->move); spin_unlock(&man->move_lock); if (fence) { ret = dma_fence_wait(fence, false); dma_fence_put(fence); if (ret) return ret; } return 0; } int ttm_bo_clean_mm(struct ttm_bo_device *bdev, unsigned mem_type) { struct ttm_mem_type_manager *man; int ret = -EINVAL; if (mem_type >= TTM_NUM_MEM_TYPES) { pr_err("Illegal memory type %d\n", mem_type); return ret; } man = &bdev->man[mem_type]; if (!man->has_type) { pr_err("Trying to take down uninitialized memory manager type %u\n", mem_type); return ret; } man->use_type = false; man->has_type = false; ret = 0; if (mem_type > 0) { ret = ttm_bo_force_list_clean(bdev, mem_type); if (ret) { pr_err("Cleanup eviction failed\n"); return ret; } ret = (*man->func->takedown)(man); } dma_fence_put(man->move); man->move = NULL; return ret; } EXPORT_SYMBOL(ttm_bo_clean_mm); int ttm_bo_evict_mm(struct ttm_bo_device *bdev, unsigned mem_type) { struct ttm_mem_type_manager *man = &bdev->man[mem_type]; if (mem_type == 0 || mem_type >= TTM_NUM_MEM_TYPES) { pr_err("Illegal memory manager memory type %u\n", mem_type); return -EINVAL; } if (!man->has_type) { pr_err("Memory type %u has not been initialized\n", mem_type); return 0; } return ttm_bo_force_list_clean(bdev, mem_type); } EXPORT_SYMBOL(ttm_bo_evict_mm); int ttm_bo_init_mm(struct ttm_bo_device *bdev, unsigned type, unsigned long p_size) { int ret; struct ttm_mem_type_manager *man; unsigned i; BUG_ON(type >= TTM_NUM_MEM_TYPES); man = &bdev->man[type]; BUG_ON(man->has_type); man->io_reserve_fastpath = true; man->use_io_reserve_lru = false; mutex_init(&man->io_reserve_mutex); spin_lock_init(&man->move_lock); INIT_LIST_HEAD(&man->io_reserve_lru); ret = bdev->driver->init_mem_type(bdev, type, man); if (ret) return ret; man->bdev = bdev; if (type != TTM_PL_SYSTEM) { ret = (*man->func->init)(man, p_size); if (ret) return ret; } man->has_type = true; man->use_type = true; man->size = p_size; for (i = 0; i < TTM_MAX_BO_PRIORITY; ++i) INIT_LIST_HEAD(&man->lru[i]); man->move = NULL; return 0; } EXPORT_SYMBOL(ttm_bo_init_mm); static void ttm_bo_global_kobj_release(struct kobject *kobj) { struct ttm_bo_global *glob = container_of(kobj, struct ttm_bo_global, kobj); __free_page(glob->dummy_read_page); } static void ttm_bo_global_release(void) { struct ttm_bo_global *glob = &ttm_bo_glob; mutex_lock(&ttm_global_mutex); if (--ttm_bo_glob_use_count > 0) goto out; kobject_del(&glob->kobj); kobject_put(&glob->kobj); ttm_mem_global_release(&ttm_mem_glob); memset(glob, 0, sizeof(*glob)); out: mutex_unlock(&ttm_global_mutex); } static int ttm_bo_global_init(void) { struct ttm_bo_global *glob = &ttm_bo_glob; int ret = 0; unsigned i; mutex_lock(&ttm_global_mutex); if (++ttm_bo_glob_use_count > 1) goto out; ret = ttm_mem_global_init(&ttm_mem_glob); if (ret) goto out; spin_lock_init(&glob->lru_lock); glob->dummy_read_page = alloc_page(__GFP_ZERO | GFP_DMA32); if (unlikely(glob->dummy_read_page == NULL)) { ret = -ENOMEM; goto out; } for (i = 0; i < TTM_MAX_BO_PRIORITY; ++i) INIT_LIST_HEAD(&glob->swap_lru[i]); INIT_LIST_HEAD(&glob->device_list); atomic_set(&glob->bo_count, 0); ret = kobject_init_and_add( &glob->kobj, &ttm_bo_glob_kobj_type, ttm_get_kobj(), "buffer_objects"); if (unlikely(ret != 0)) kobject_put(&glob->kobj); out: mutex_unlock(&ttm_global_mutex); return ret; } int ttm_bo_device_release(struct ttm_bo_device *bdev) { struct ttm_bo_global *glob = &ttm_bo_glob; int ret = 0; unsigned i = TTM_NUM_MEM_TYPES; struct ttm_mem_type_manager *man; while (i--) { man = &bdev->man[i]; if (man->has_type) { man->use_type = false; if ((i != TTM_PL_SYSTEM) && ttm_bo_clean_mm(bdev, i)) { ret = -EBUSY; pr_err("DRM memory manager type %d is not clean\n", i); } man->has_type = false; } } mutex_lock(&ttm_global_mutex); list_del(&bdev->device_list); mutex_unlock(&ttm_global_mutex); cancel_delayed_work_sync(&bdev->wq); if (ttm_bo_delayed_delete(bdev, true)) pr_debug("Delayed destroy list was clean\n"); spin_lock(&glob->lru_lock); for (i = 0; i < TTM_MAX_BO_PRIORITY; ++i) if (list_empty(&bdev->man[0].lru[0])) pr_debug("Swap list %d was clean\n", i); spin_unlock(&glob->lru_lock); if (!ret) ttm_bo_global_release(); return ret; } EXPORT_SYMBOL(ttm_bo_device_release); int ttm_bo_device_init(struct ttm_bo_device *bdev, struct ttm_bo_driver *driver, struct address_space *mapping, struct drm_vma_offset_manager *vma_manager, bool need_dma32) { struct ttm_bo_global *glob = &ttm_bo_glob; int ret; if (WARN_ON(vma_manager == NULL)) return -EINVAL; ret = ttm_bo_global_init(); if (ret) return ret; bdev->driver = driver; memset(bdev->man, 0, sizeof(bdev->man)); /* * Initialize the system memory buffer type. * Other types need to be driver / IOCTL initialized. */ ret = ttm_bo_init_mm(bdev, TTM_PL_SYSTEM, 0); if (unlikely(ret != 0)) goto out_no_sys; bdev->vma_manager = vma_manager; INIT_DELAYED_WORK(&bdev->wq, ttm_bo_delayed_workqueue); INIT_LIST_HEAD(&bdev->ddestroy); bdev->dev_mapping = mapping; bdev->need_dma32 = need_dma32; mutex_lock(&ttm_global_mutex); list_add_tail(&bdev->device_list, &glob->device_list); mutex_unlock(&ttm_global_mutex); return 0; out_no_sys: ttm_bo_global_release(); return ret; } EXPORT_SYMBOL(ttm_bo_device_init); /* * buffer object vm functions. */ bool ttm_mem_reg_is_pci(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem) { struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type]; if (!(man->flags & TTM_MEMTYPE_FLAG_FIXED)) { if (mem->mem_type == TTM_PL_SYSTEM) return false; if (man->flags & TTM_MEMTYPE_FLAG_CMA) return false; if (mem->placement & TTM_PL_FLAG_CACHED) return false; } return true; } void ttm_bo_unmap_virtual_locked(struct ttm_buffer_object *bo) { struct ttm_bo_device *bdev = bo->bdev; drm_vma_node_unmap(&bo->base.vma_node, bdev->dev_mapping); ttm_mem_io_free_vm(bo); } void ttm_bo_unmap_virtual(struct ttm_buffer_object *bo) { struct ttm_bo_device *bdev = bo->bdev; struct ttm_mem_type_manager *man = &bdev->man[bo->mem.mem_type]; ttm_mem_io_lock(man, false); ttm_bo_unmap_virtual_locked(bo); ttm_mem_io_unlock(man); } EXPORT_SYMBOL(ttm_bo_unmap_virtual); int ttm_bo_wait(struct ttm_buffer_object *bo, bool interruptible, bool no_wait) { long timeout = 15 * HZ; if (no_wait) { if (dma_resv_test_signaled_rcu(bo->base.resv, true)) return 0; else return -EBUSY; } timeout = dma_resv_wait_timeout_rcu(bo->base.resv, true, interruptible, timeout); if (timeout < 0) return timeout; if (timeout == 0) return -EBUSY; dma_resv_add_excl_fence(bo->base.resv, NULL); return 0; } EXPORT_SYMBOL(ttm_bo_wait); /** * A buffer object shrink method that tries to swap out the first * buffer object on the bo_global::swap_lru list. */ int ttm_bo_swapout(struct ttm_bo_global *glob, struct ttm_operation_ctx *ctx) { struct ttm_buffer_object *bo; int ret = -EBUSY; bool locked; unsigned i; spin_lock(&glob->lru_lock); for (i = 0; i < TTM_MAX_BO_PRIORITY; ++i) { list_for_each_entry(bo, &glob->swap_lru[i], swap) { if (!ttm_bo_evict_swapout_allowable(bo, ctx, &locked, NULL)) continue; if (!ttm_bo_get_unless_zero(bo)) { if (locked) dma_resv_unlock(bo->base.resv); continue; } ret = 0; break; } if (!ret) break; } if (ret) { spin_unlock(&glob->lru_lock); return ret; } if (bo->deleted) { ret = ttm_bo_cleanup_refs(bo, false, false, locked); ttm_bo_put(bo); return ret; } ttm_bo_del_from_lru(bo); spin_unlock(&glob->lru_lock); /** * Move to system cached */ if (bo->mem.mem_type != TTM_PL_SYSTEM || bo->ttm->caching_state != tt_cached) { struct ttm_operation_ctx ctx = { false, false }; struct ttm_mem_reg evict_mem; evict_mem = bo->mem; evict_mem.mm_node = NULL; evict_mem.placement = TTM_PL_FLAG_SYSTEM | TTM_PL_FLAG_CACHED; evict_mem.mem_type = TTM_PL_SYSTEM; ret = ttm_bo_handle_move_mem(bo, &evict_mem, true, &ctx); if (unlikely(ret != 0)) goto out; } /** * Make sure BO is idle. */ ret = ttm_bo_wait(bo, false, false); if (unlikely(ret != 0)) goto out; ttm_bo_unmap_virtual(bo); /** * Swap out. Buffer will be swapped in again as soon as * anyone tries to access a ttm page. */ if (bo->bdev->driver->swap_notify) bo->bdev->driver->swap_notify(bo); ret = ttm_tt_swapout(bo->ttm, bo->persistent_swap_storage); out: /** * * Unreserve without putting on LRU to avoid swapping out an * already swapped buffer. */ if (locked) dma_resv_unlock(bo->base.resv); ttm_bo_put(bo); return ret; } EXPORT_SYMBOL(ttm_bo_swapout); void ttm_bo_swapout_all(struct ttm_bo_device *bdev) { struct ttm_operation_ctx ctx = { .interruptible = false, .no_wait_gpu = false }; while (ttm_bo_swapout(&ttm_bo_glob, &ctx) == 0); } EXPORT_SYMBOL(ttm_bo_swapout_all);
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