--- /dev/null
+/**************************************************************************
+ *
+ * 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/reservation.h>
+
+#define TTM_ASSERT_LOCKED(param)
+#define TTM_DEBUG(fmt, arg...)
+#define TTM_BO_HASH_ORDER 13
+
+static int ttm_bo_swapout(struct ttm_mem_shrink *shrink);
+static void ttm_bo_global_kobj_release(struct kobject *kobj);
+
+static struct attribute ttm_bo_count = {
+ .name = "bo_count",
+ .mode = S_IRUGO
+};
+
+static inline int ttm_mem_type_from_place(const struct ttm_place *place,
+ uint32_t *mem_type)
+{
+ int i;
+
+ for (i = 0; i <= TTM_PL_PRIV5; i++)
+ if (place->flags & (1 << i)) {
+ *mem_type = i;
+ return 0;
+ }
+ return -EINVAL;
+}
+
+static void ttm_mem_type_debug(struct ttm_bo_device *bdev, int mem_type)
+{
+ struct ttm_mem_type_manager *man = &bdev->man[mem_type];
+
+ pr_err(" has_type: %d\n", man->has_type);
+ pr_err(" use_type: %d\n", man->use_type);
+ pr_err(" flags: 0x%08X\n", man->flags);
+ pr_err(" gpu_offset: 0x%08llX\n", man->gpu_offset);
+ pr_err(" size: %llu\n", man->size);
+ pr_err(" available_caching: 0x%08X\n", man->available_caching);
+ pr_err(" default_caching: 0x%08X\n", man->default_caching);
+ if (mem_type != TTM_PL_SYSTEM)
+ (*man->func->debug)(man, TTM_PFX);
+}
+
+static void ttm_bo_mem_space_debug(struct ttm_buffer_object *bo,
+ struct ttm_placement *placement)
+{
+ int i, ret, mem_type;
+
+ pr_err("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;
+ pr_err(" placement[%d]=0x%08X (%d)\n",
+ i, placement->placement[i].flags, mem_type);
+ ttm_mem_type_debug(bo->bdev, 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, "%lu\n",
+ (unsigned long) 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_release_list(struct kref *list_kref)
+{
+ struct ttm_buffer_object *bo =
+ container_of(list_kref, struct ttm_buffer_object, list_kref);
+ struct ttm_bo_device *bdev = bo->bdev;
+ size_t acc_size = bo->acc_size;
+
+ BUG_ON(atomic_read(&bo->list_kref.refcount));
+ BUG_ON(atomic_read(&bo->kref.refcount));
+ BUG_ON(atomic_read(&bo->cpu_writers));
+ BUG_ON(bo->mem.mm_node != NULL);
+ BUG_ON(!list_empty(&bo->lru));
+ BUG_ON(!list_empty(&bo->ddestroy));
+
+ if (bo->ttm)
+ ttm_tt_destroy(bo->ttm);
+ atomic_dec(&bo->glob->bo_count);
+ if (bo->resv == &bo->ttm_resv)
+ reservation_object_fini(&bo->ttm_resv);
+ mutex_destroy(&bo->wu_mutex);
+ if (bo->destroy)
+ bo->destroy(bo);
+ else {
+ kfree(bo);
+ }
+ ttm_mem_global_free(bdev->glob->mem_glob, acc_size);
+}
+
+void ttm_bo_add_to_lru(struct ttm_buffer_object *bo)
+{
+ struct ttm_bo_device *bdev = bo->bdev;
+ struct ttm_mem_type_manager *man;
+
+ lockdep_assert_held(&bo->resv->lock.base);
+
+ if (!(bo->mem.placement & TTM_PL_FLAG_NO_EVICT)) {
+
+ BUG_ON(!list_empty(&bo->lru));
+
+ man = &bdev->man[bo->mem.mem_type];
+ list_add_tail(&bo->lru, &man->lru);
+ kref_get(&bo->list_kref);
+
+ if (bo->ttm != NULL) {
+ list_add_tail(&bo->swap, &bo->glob->swap_lru);
+ kref_get(&bo->list_kref);
+ }
+ }
+}
+EXPORT_SYMBOL(ttm_bo_add_to_lru);
+
+int ttm_bo_del_from_lru(struct ttm_buffer_object *bo)
+{
+ int put_count = 0;
+
+ if (!list_empty(&bo->swap)) {
+ list_del_init(&bo->swap);
+ ++put_count;
+ }
+ if (!list_empty(&bo->lru)) {
+ list_del_init(&bo->lru);
+ ++put_count;
+ }
+
+ /*
+ * TODO: Add a driver hook to delete from
+ * driver-specific LRU's here.
+ */
+
+ return put_count;
+}
+
+static void ttm_bo_ref_bug(struct kref *list_kref)
+{
+ BUG();
+}
+
+void ttm_bo_list_ref_sub(struct ttm_buffer_object *bo, int count,
+ bool never_free)
+{
+ kref_sub(&bo->list_kref, count,
+ (never_free) ? ttm_bo_ref_bug : ttm_bo_release_list);
+}
+
+void ttm_bo_del_sub_from_lru(struct ttm_buffer_object *bo)
+{
+ int put_count;
+
+ spin_lock(&bo->glob->lru_lock);
+ put_count = ttm_bo_del_from_lru(bo);
+ spin_unlock(&bo->glob->lru_lock);
+ ttm_bo_list_ref_sub(bo, put_count, true);
+}
+EXPORT_SYMBOL(ttm_bo_del_sub_from_lru);
+
+/*
+ * Call bo->mutex locked.
+ */
+static int ttm_bo_add_ttm(struct ttm_buffer_object *bo, bool zero_alloc)
+{
+ struct ttm_bo_device *bdev = bo->bdev;
+ struct ttm_bo_global *glob = bo->glob;
+ int ret = 0;
+ uint32_t page_flags = 0;
+
+ TTM_ASSERT_LOCKED(&bo->mutex);
+ bo->ttm = NULL;
+
+ if (bdev->need_dma32)
+ page_flags |= TTM_PAGE_FLAG_DMA32;
+
+ switch (bo->type) {
+ case ttm_bo_type_device:
+ if (zero_alloc)
+ page_flags |= TTM_PAGE_FLAG_ZERO_ALLOC;
+ case ttm_bo_type_kernel:
+ bo->ttm = bdev->driver->ttm_tt_create(bdev, bo->num_pages << PAGE_SHIFT,
+ page_flags, glob->dummy_read_page);
+ if (unlikely(bo->ttm == NULL))
+ ret = -ENOMEM;
+ break;
+ case ttm_bo_type_sg:
+ bo->ttm = bdev->driver->ttm_tt_create(bdev, bo->num_pages << PAGE_SHIFT,
+ page_flags | TTM_PAGE_FLAG_SG,
+ glob->dummy_read_page);
+ if (unlikely(bo->ttm == NULL)) {
+ ret = -ENOMEM;
+ break;
+ }
+ bo->ttm->sg = bo->sg;
+ break;
+ default:
+ pr_err("Illegal buffer object type\n");
+ ret = -EINVAL;
+ break;
+ }
+
+ return ret;
+}
+
+static int ttm_bo_handle_move_mem(struct ttm_buffer_object *bo,
+ struct ttm_mem_reg *mem,
+ bool evict, bool interruptible,
+ bool no_wait_gpu)
+{
+ 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_bo_add_ttm(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);
+ if (ret)
+ goto out_err;
+ }
+
+ if (bo->mem.mem_type == TTM_PL_SYSTEM) {
+ if (bdev->driver->move_notify)
+ bdev->driver->move_notify(bo, mem);
+ bo->mem = *mem;
+ mem->mm_node = NULL;
+ goto moved;
+ }
+ }
+
+ if (bdev->driver->move_notify)
+ bdev->driver->move_notify(bo, mem);
+
+ if (!(old_man->flags & TTM_MEMTYPE_FLAG_FIXED) &&
+ !(new_man->flags & TTM_MEMTYPE_FLAG_FIXED))
+ ret = ttm_bo_move_ttm(bo, evict, no_wait_gpu, mem);
+ else if (bdev->driver->move)
+ ret = bdev->driver->move(bo, evict, interruptible,
+ no_wait_gpu, mem);
+ else
+ ret = ttm_bo_move_memcpy(bo, evict, no_wait_gpu, mem);
+
+ if (ret) {
+ if (bdev->driver->move_notify) {
+ struct ttm_mem_reg tmp_mem = *mem;
+ *mem = bo->mem;
+ bo->mem = tmp_mem;
+ bdev->driver->move_notify(bo, mem);
+ bo->mem = *mem;
+ *mem = tmp_mem;
+ }
+
+ goto out_err;
+ }
+
+moved:
+ if (bo->evicted) {
+ if (bdev->driver->invalidate_caches) {
+ ret = bdev->driver->invalidate_caches(bdev, bo->mem.placement);
+ if (ret)
+ pr_err("Can not flush read caches\n");
+ }
+ bo->evicted = false;
+ }
+
+ if (bo->mem.mm_node) {
+ bo->offset = (bo->mem.start << PAGE_SHIFT) +
+ bdev->man[bo->mem.mem_type].gpu_offset;
+ bo->cur_placement = bo->mem.placement;
+ } else
+ bo->offset = 0;
+
+ return 0;
+
+out_err:
+ new_man = &bdev->man[bo->mem.mem_type];
+ if ((new_man->flags & TTM_MEMTYPE_FLAG_FIXED) && bo->ttm) {
+ ttm_tt_unbind(bo->ttm);
+ 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, NULL);
+
+ if (bo->ttm) {
+ ttm_tt_unbind(bo->ttm);
+ ttm_tt_destroy(bo->ttm);
+ bo->ttm = NULL;
+ }
+ ttm_bo_mem_put(bo, &bo->mem);
+
+ ww_mutex_unlock (&bo->resv->lock);
+}
+
+static void ttm_bo_flush_all_fences(struct ttm_buffer_object *bo)
+{
+ struct reservation_object_list *fobj;
+ struct fence *fence;
+ int i;
+
+ fobj = reservation_object_get_list(bo->resv);
+ fence = reservation_object_get_excl(bo->resv);
+ if (fence && !fence->ops->signaled)
+ fence_enable_sw_signaling(fence);
+
+ for (i = 0; fobj && i < fobj->shared_count; ++i) {
+ fence = rcu_dereference_protected(fobj->shared[i],
+ reservation_object_held(bo->resv));
+
+ if (!fence->ops->signaled)
+ fence_enable_sw_signaling(fence);
+ }
+}
+
+static void ttm_bo_cleanup_refs_or_queue(struct ttm_buffer_object *bo)
+{
+ struct ttm_bo_device *bdev = bo->bdev;
+ struct ttm_bo_global *glob = bo->glob;
+ int put_count;
+ int ret;
+
+ spin_lock(&glob->lru_lock);
+ ret = __ttm_bo_reserve(bo, false, true, false, NULL);
+
+ if (!ret) {
+ if (!ttm_bo_wait(bo, false, false, true)) {
+ put_count = ttm_bo_del_from_lru(bo);
+
+ spin_unlock(&glob->lru_lock);
+ ttm_bo_cleanup_memtype_use(bo);
+
+ ttm_bo_list_ref_sub(bo, put_count, true);
+
+ return;
+ } else
+ ttm_bo_flush_all_fences(bo);
+
+ /*
+ * 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_add_to_lru(bo);
+ }
+
+ __ttm_bo_unreserve(bo);
+ }
+
+ kref_get(&bo->list_kref);
+ list_add_tail(&bo->ddestroy, &bdev->ddestroy);
+ spin_unlock(&glob->lru_lock);
+
+ schedule_delayed_work(&bdev->wq,
+ ((HZ / 100) < 1) ? 1 : HZ / 100);
+}
+
+/**
+ * function ttm_bo_cleanup_refs_and_unlock
+ * If bo idle, remove from delayed- and lru lists, and unref.
+ * If not idle, do nothing.
+ *
+ * Must be called with lru_lock and reservation held, this function
+ * will drop both before returning.
+ *
+ * @interruptible Any sleeps should occur interruptibly.
+ * @no_wait_gpu Never wait for gpu. Return -EBUSY instead.
+ */
+
+static int ttm_bo_cleanup_refs_and_unlock(struct ttm_buffer_object *bo,
+ bool interruptible,
+ bool no_wait_gpu)
+{
+ struct ttm_bo_global *glob = bo->glob;
+ int put_count;
+ int ret;
+
+ ret = ttm_bo_wait(bo, false, false, true);
+
+ if (ret && !no_wait_gpu) {
+ long lret;
+ ww_mutex_unlock(&bo->resv->lock);
+ spin_unlock(&glob->lru_lock);
+
+ lret = reservation_object_wait_timeout_rcu(bo->resv,
+ true,
+ interruptible,
+ 30 * HZ);
+
+ if (lret < 0)
+ return lret;
+ else if (lret == 0)
+ return -EBUSY;
+
+ spin_lock(&glob->lru_lock);
+ ret = __ttm_bo_reserve(bo, false, true, false, NULL);
+
+ /*
+ * 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.
+ */
+ if (ret) {
+ spin_unlock(&glob->lru_lock);
+ return 0;
+ }
+
+ /*
+ * remove sync_obj with ttm_bo_wait, the wait should be
+ * finished, and no new wait object should have been added.
+ */
+ ret = ttm_bo_wait(bo, false, false, true);
+ WARN_ON(ret);
+ }
+
+ if (ret || unlikely(list_empty(&bo->ddestroy))) {
+ __ttm_bo_unreserve(bo);
+ spin_unlock(&glob->lru_lock);
+ return ret;
+ }
+
+ put_count = ttm_bo_del_from_lru(bo);
+ list_del_init(&bo->ddestroy);
+ ++put_count;
+
+ spin_unlock(&glob->lru_lock);
+ ttm_bo_cleanup_memtype_use(bo);
+
+ ttm_bo_list_ref_sub(bo, put_count, true);
+
+ return 0;
+}
+
+/**
+ * Traverse the delayed list, and call ttm_bo_cleanup_refs on all
+ * encountered buffers.
+ */
+
+static int ttm_bo_delayed_delete(struct ttm_bo_device *bdev, bool remove_all)
+{
+ struct ttm_bo_global *glob = bdev->glob;
+ struct ttm_buffer_object *entry = NULL;
+ int ret = 0;
+
+ spin_lock(&glob->lru_lock);
+ if (list_empty(&bdev->ddestroy))
+ goto out_unlock;
+
+ entry = list_first_entry(&bdev->ddestroy,
+ struct ttm_buffer_object, ddestroy);
+ kref_get(&entry->list_kref);
+
+ for (;;) {
+ struct ttm_buffer_object *nentry = NULL;
+
+ if (entry->ddestroy.next != &bdev->ddestroy) {
+ nentry = list_first_entry(&entry->ddestroy,
+ struct ttm_buffer_object, ddestroy);
+ kref_get(&nentry->list_kref);
+ }
+
+ ret = __ttm_bo_reserve(entry, false, true, false, NULL);
+ if (remove_all && ret) {
+ spin_unlock(&glob->lru_lock);
+ ret = __ttm_bo_reserve(entry, false, false,
+ false, NULL);
+ spin_lock(&glob->lru_lock);
+ }
+
+ if (!ret)
+ ret = ttm_bo_cleanup_refs_and_unlock(entry, false,
+ !remove_all);
+ else
+ spin_unlock(&glob->lru_lock);
+
+ kref_put(&entry->list_kref, ttm_bo_release_list);
+ entry = nentry;
+
+ if (ret || !entry)
+ goto out;
+
+ spin_lock(&glob->lru_lock);
+ if (list_empty(&entry->ddestroy))
+ break;
+ }
+
+out_unlock:
+ spin_unlock(&glob->lru_lock);
+out:
+ if (entry)
+ kref_put(&entry->list_kref, ttm_bo_release_list);
+ return ret;
+}
+
+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];
+
+ drm_vma_offset_remove(&bdev->vma_manager, &bo->vma_node);
+ ttm_mem_io_lock(man, false);
+ ttm_mem_io_free_vm(bo);
+ ttm_mem_io_unlock(man);
+ ttm_bo_cleanup_refs_or_queue(bo);
+ kref_put(&bo->list_kref, ttm_bo_release_list);
+}
+
+void ttm_bo_unref(struct ttm_buffer_object **p_bo)
+{
+ struct ttm_buffer_object *bo = *p_bo;
+
+ *p_bo = NULL;
+ kref_put(&bo->kref, ttm_bo_release);
+}
+EXPORT_SYMBOL(ttm_bo_unref);
+
+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, bool interruptible,
+ bool no_wait_gpu)
+{
+ struct ttm_bo_device *bdev = bo->bdev;
+ struct ttm_mem_reg evict_mem;
+ struct ttm_placement placement;
+ int ret = 0;
+
+ ret = ttm_bo_wait(bo, false, interruptible, no_wait_gpu);
+
+ if (unlikely(ret != 0)) {
+ if (ret != -ERESTARTSYS) {
+ pr_err("Failed to expire sync object before buffer eviction\n");
+ }
+ goto out;
+ }
+
+ lockdep_assert_held(&bo->resv->lock.base);
+
+ evict_mem = bo->mem;
+ evict_mem.mm_node = NULL;
+ evict_mem.bus.io_reserved_vm = false;
+ evict_mem.bus.io_reserved_count = 0;
+
+ placement.num_placement = 0;
+ placement.num_busy_placement = 0;
+ bdev->driver->evict_flags(bo, &placement);
+ ret = ttm_bo_mem_space(bo, &placement, &evict_mem, interruptible,
+ no_wait_gpu);
+ 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, interruptible,
+ no_wait_gpu);
+ if (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;
+}
+
+static int ttm_mem_evict_first(struct ttm_bo_device *bdev,
+ uint32_t mem_type,
+ const struct ttm_place *place,
+ bool interruptible,
+ bool no_wait_gpu)
+{
+ struct ttm_bo_global *glob = bdev->glob;
+ struct ttm_mem_type_manager *man = &bdev->man[mem_type];
+ struct ttm_buffer_object *bo;
+ int ret = -EBUSY, put_count;
+
+ spin_lock(&glob->lru_lock);
+ list_for_each_entry(bo, &man->lru, lru) {
+ ret = __ttm_bo_reserve(bo, false, true, false, NULL);
+ if (!ret) {
+ if (place && (place->fpfn || place->lpfn)) {
+ /* 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)) {
+ __ttm_bo_unreserve(bo);
+ ret = -EBUSY;
+ continue;
+ }
+ }
+
+ break;
+ }
+ }
+
+ if (ret) {
+ spin_unlock(&glob->lru_lock);
+ return ret;
+ }
+
+ kref_get(&bo->list_kref);
+
+ if (!list_empty(&bo->ddestroy)) {
+ ret = ttm_bo_cleanup_refs_and_unlock(bo, interruptible,
+ no_wait_gpu);
+ kref_put(&bo->list_kref, ttm_bo_release_list);
+ return ret;
+ }
+
+ put_count = ttm_bo_del_from_lru(bo);
+ spin_unlock(&glob->lru_lock);
+
+ BUG_ON(ret != 0);
+
+ ttm_bo_list_ref_sub(bo, put_count, true);
+
+ ret = ttm_bo_evict(bo, interruptible, no_wait_gpu);
+ ttm_bo_unreserve(bo);
+
+ kref_put(&bo->list_kref, ttm_bo_release_list);
+ 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);
+
+/**
+ * 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,
+ uint32_t mem_type,
+ const struct ttm_place *place,
+ struct ttm_mem_reg *mem,
+ bool interruptible,
+ bool no_wait_gpu)
+{
+ struct ttm_bo_device *bdev = bo->bdev;
+ struct ttm_mem_type_manager *man = &bdev->man[mem_type];
+ int ret;
+
+ 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_type, place,
+ interruptible, no_wait_gpu);
+ if (unlikely(ret != 0))
+ return ret;
+ } while (1);
+ if (mem->mm_node == NULL)
+ return -ENOMEM;
+ mem->mem_type = mem_type;
+ return 0;
+}
+
+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;
+}
+
+/**
+ * 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,
+ bool interruptible,
+ bool no_wait_gpu)
+{
+ struct ttm_bo_device *bdev = bo->bdev;
+ struct ttm_mem_type_manager *man;
+ uint32_t mem_type = TTM_PL_SYSTEM;
+ uint32_t cur_flags = 0;
+ bool type_found = false;
+ bool type_ok = false;
+ bool has_erestartsys = false;
+ int i, ret;
+
+ mem->mm_node = NULL;
+ for (i = 0; i < placement->num_placement; ++i) {
+ const struct ttm_place *place = &placement->placement[i];
+
+ ret = ttm_mem_type_from_place(place, &mem_type);
+ if (ret)
+ return ret;
+ man = &bdev->man[mem_type];
+
+ type_ok = ttm_bo_mt_compatible(man, mem_type, place,
+ &cur_flags);
+
+ if (!type_ok)
+ continue;
+
+ 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);
+
+ if (mem_type == TTM_PL_SYSTEM)
+ break;
+
+ if (man->has_type && man->use_type) {
+ type_found = true;
+ ret = (*man->func->get_node)(man, bo, place, mem);
+ if (unlikely(ret))
+ return ret;
+ }
+ if (mem->mm_node)
+ break;
+ }
+
+ if ((type_ok && (mem_type == TTM_PL_SYSTEM)) || mem->mm_node) {
+ mem->mem_type = mem_type;
+ mem->placement = cur_flags;
+ return 0;
+ }
+
+ if (!type_found)
+ return -EINVAL;
+
+ for (i = 0; i < placement->num_busy_placement; ++i) {
+ const struct ttm_place *place = &placement->busy_placement[i];
+
+ ret = ttm_mem_type_from_place(place, &mem_type);
+ if (ret)
+ return ret;
+ man = &bdev->man[mem_type];
+ if (!man->has_type)
+ continue;
+ if (!ttm_bo_mt_compatible(man, mem_type, place, &cur_flags))
+ continue;
+
+ 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);
+
+ if (mem_type == TTM_PL_SYSTEM) {
+ mem->mem_type = mem_type;
+ mem->placement = cur_flags;
+ mem->mm_node = NULL;
+ return 0;
+ }
+
+ ret = ttm_bo_mem_force_space(bo, mem_type, place, mem,
+ interruptible, no_wait_gpu);
+ if (ret == 0 && mem->mm_node) {
+ mem->placement = cur_flags;
+ return 0;
+ }
+ if (ret == -ERESTARTSYS)
+ has_erestartsys = true;
+ }
+ ret = (has_erestartsys) ? -ERESTARTSYS : -ENOMEM;
+ return ret;
+}
+EXPORT_SYMBOL(ttm_bo_mem_space);
+
+static int ttm_bo_move_buffer(struct ttm_buffer_object *bo,
+ struct ttm_placement *placement,
+ bool interruptible,
+ bool no_wait_gpu)
+{
+ int ret = 0;
+ struct ttm_mem_reg mem;
+
+ lockdep_assert_held(&bo->resv->lock.base);
+
+ /*
+ * FIXME: It's possible to pipeline buffer moves.
+ * Have the driver move function wait for idle when necessary,
+ * instead of doing it here.
+ */
+ ret = ttm_bo_wait(bo, false, interruptible, no_wait_gpu);
+ if (ret)
+ return ret;
+ 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,
+ interruptible, no_wait_gpu);
+ if (ret)
+ goto out_unlock;
+ ret = ttm_bo_handle_move_mem(bo, &mem, false,
+ interruptible, no_wait_gpu);
+out_unlock:
+ if (ret && mem.mm_node)
+ ttm_bo_mem_put(bo, &mem);
+ return ret;
+}
+
+static bool ttm_bo_mem_compat(struct ttm_placement *placement,
+ struct ttm_mem_reg *mem,
+ uint32_t *new_flags)
+{
+ int i;
+
+ for (i = 0; i < placement->num_placement; i++) {
+ const struct ttm_place *heap = &placement->placement[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))
+ return true;
+ }
+
+ for (i = 0; i < placement->num_busy_placement; i++) {
+ const struct ttm_place *heap = &placement->busy_placement[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))
+ return true;
+ }
+
+ return false;
+}
+
+int ttm_bo_validate(struct ttm_buffer_object *bo,
+ struct ttm_placement *placement,
+ bool interruptible,
+ bool no_wait_gpu)
+{
+ int ret;
+ uint32_t new_flags;
+
+ lockdep_assert_held(&bo->resv->lock.base);
+ /*
+ * Check whether we need to move buffer.
+ */
+ if (!ttm_bo_mem_compat(placement, &bo->mem, &new_flags)) {
+ ret = ttm_bo_move_buffer(bo, placement, interruptible,
+ no_wait_gpu);
+ 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_bo_add_ttm(bo, true);
+ if (ret)
+ return ret;
+ }
+ return 0;
+}
+EXPORT_SYMBOL(ttm_bo_validate);
+
+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,
+ struct file *persistent_swap_storage,
+ size_t acc_size,
+ struct sg_table *sg,
+ struct reservation_object *resv,
+ void (*destroy) (struct ttm_buffer_object *))
+{
+ int ret = 0;
+ unsigned long num_pages;
+ struct ttm_mem_global *mem_glob = bdev->glob->mem_glob;
+ bool locked;
+
+ ret = ttm_mem_global_alloc(mem_glob, acc_size, false, false);
+ 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;
+
+ kref_init(&bo->kref);
+ kref_init(&bo->list_kref);
+ atomic_set(&bo->cpu_writers, 0);
+ INIT_LIST_HEAD(&bo->lru);
+ INIT_LIST_HEAD(&bo->ddestroy);
+ INIT_LIST_HEAD(&bo->swap);
+ INIT_LIST_HEAD(&bo->io_reserve_lru);
+ mutex_init(&bo->wu_mutex);
+ bo->bdev = bdev;
+ bo->glob = bdev->glob;
+ 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->priv_flags = 0;
+ bo->mem.placement = (TTM_PL_FLAG_SYSTEM | TTM_PL_FLAG_CACHED);
+ bo->persistent_swap_storage = persistent_swap_storage;
+ bo->acc_size = acc_size;
+ bo->sg = sg;
+ if (resv) {
+ bo->resv = resv;
+ lockdep_assert_held(&bo->resv->lock.base);
+ } else {
+ bo->resv = &bo->ttm_resv;
+ reservation_object_init(&bo->ttm_resv);
+ }
+ atomic_inc(&bo->glob->bo_count);
+ drm_vma_node_reset(&bo->vma_node);
+
+ /*
+ * 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->vma_node,
+ bo->mem.num_pages);
+
+ /* passed reservation objects should already be locked,
+ * since otherwise lockdep will be angered in radeon.
+ */
+ if (!resv) {
+ locked = ww_mutex_trylock(&bo->resv->lock);
+ WARN_ON(!locked);
+ }
+
+ if (likely(!ret))
+ ret = ttm_bo_validate(bo, placement, interruptible, false);
+
+ if (!resv)
+ ttm_bo_unreserve(bo);
+
+ if (unlikely(ret))
+ ttm_bo_unref(&bo);
+
+ return ret;
+}
+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 += PAGE_ALIGN(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 += PAGE_ALIGN(npages * sizeof(void *));
+ size += PAGE_ALIGN(npages * 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 file *persistent_swap_storage,
+ 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, persistent_swap_storage, 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, bool allow_errors)
+{
+ struct ttm_mem_type_manager *man = &bdev->man[mem_type];
+ struct ttm_bo_global *glob = bdev->glob;
+ int ret;
+
+ /*
+ * Can't use standard list traversal since we're unlocking.
+ */
+
+ spin_lock(&glob->lru_lock);
+ while (!list_empty(&man->lru)) {
+ spin_unlock(&glob->lru_lock);
+ ret = ttm_mem_evict_first(bdev, mem_type, NULL, false, false);
+ if (ret) {
+ if (allow_errors) {
+ return ret;
+ } else {
+ pr_err("Cleanup eviction failed\n");
+ }
+ }
+ spin_lock(&glob->lru_lock);
+ }
+ spin_unlock(&glob->lru_lock);
+ 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) {
+ ttm_bo_force_list_clean(bdev, mem_type, false);
+
+ ret = (*man->func->takedown)(man);
+ }
+
+ 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, true);
+}
+EXPORT_SYMBOL(ttm_bo_evict_mm);
+
+int ttm_bo_init_mm(struct ttm_bo_device *bdev, unsigned type,
+ unsigned long p_size)
+{
+ int ret = -EINVAL;
+ struct ttm_mem_type_manager *man;
+
+ 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);
+ INIT_LIST_HEAD(&man->io_reserve_lru);
+
+ ret = bdev->driver->init_mem_type(bdev, type, man);
+ if (ret)
+ return ret;
+ man->bdev = bdev;
+
+ ret = 0;
+ 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;
+
+ INIT_LIST_HEAD(&man->lru);
+
+ 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);
+
+ ttm_mem_unregister_shrink(glob->mem_glob, &glob->shrink);
+ __free_page(glob->dummy_read_page);
+ kfree(glob);
+}
+
+void ttm_bo_global_release(struct drm_global_reference *ref)
+{
+ struct ttm_bo_global *glob = ref->object;
+
+ kobject_del(&glob->kobj);
+ kobject_put(&glob->kobj);
+}
+EXPORT_SYMBOL(ttm_bo_global_release);
+
+int ttm_bo_global_init(struct drm_global_reference *ref)
+{
+ struct ttm_bo_global_ref *bo_ref =
+ container_of(ref, struct ttm_bo_global_ref, ref);
+ struct ttm_bo_global *glob = ref->object;
+ int ret;
+
+ mutex_init(&glob->device_list_mutex);
+ spin_lock_init(&glob->lru_lock);
+ glob->mem_glob = bo_ref->mem_glob;
+ glob->dummy_read_page = alloc_page(__GFP_ZERO | GFP_DMA32);
+
+ if (unlikely(glob->dummy_read_page == NULL)) {
+ ret = -ENOMEM;
+ goto out_no_drp;
+ }
+
+ INIT_LIST_HEAD(&glob->swap_lru);
+ INIT_LIST_HEAD(&glob->device_list);
+
+ ttm_mem_init_shrink(&glob->shrink, ttm_bo_swapout);
+ ret = ttm_mem_register_shrink(glob->mem_glob, &glob->shrink);
+ if (unlikely(ret != 0)) {
+ pr_err("Could not register buffer object swapout\n");
+ goto out_no_shrink;
+ }
+
+ 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);
+ return ret;
+out_no_shrink:
+ __free_page(glob->dummy_read_page);
+out_no_drp:
+ kfree(glob);
+ return ret;
+}
+EXPORT_SYMBOL(ttm_bo_global_init);
+
+
+int ttm_bo_device_release(struct ttm_bo_device *bdev)
+{
+ int ret = 0;
+ unsigned i = TTM_NUM_MEM_TYPES;
+ struct ttm_mem_type_manager *man;
+ struct ttm_bo_global *glob = bdev->glob;
+
+ 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(&glob->device_list_mutex);
+ list_del(&bdev->device_list);
+ mutex_unlock(&glob->device_list_mutex);
+
+ cancel_delayed_work_sync(&bdev->wq);
+
+ while (ttm_bo_delayed_delete(bdev, true))
+ ;
+
+ spin_lock(&glob->lru_lock);
+ if (list_empty(&bdev->ddestroy))
+ TTM_DEBUG("Delayed destroy list was clean\n");
+
+ if (list_empty(&bdev->man[0].lru))
+ TTM_DEBUG("Swap list was clean\n");
+ spin_unlock(&glob->lru_lock);
+
+ drm_vma_offset_manager_destroy(&bdev->vma_manager);
+
+ return ret;
+}
+EXPORT_SYMBOL(ttm_bo_device_release);
+
+int ttm_bo_device_init(struct ttm_bo_device *bdev,
+ struct ttm_bo_global *glob,
+ struct ttm_bo_driver *driver,
+ struct address_space *mapping,
+ uint64_t file_page_offset,
+ bool need_dma32)
+{
+ int ret = -EINVAL;
+
+ 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;
+
+ drm_vma_offset_manager_init(&bdev->vma_manager, file_page_offset,
+ 0x10000000);
+ INIT_DELAYED_WORK(&bdev->wq, ttm_bo_delayed_workqueue);
+ INIT_LIST_HEAD(&bdev->ddestroy);
+ bdev->dev_mapping = mapping;
+ bdev->glob = glob;
+ bdev->need_dma32 = need_dma32;
+ bdev->val_seq = 0;
+ mutex_lock(&glob->device_list_mutex);
+ list_add_tail(&bdev->device_list, &glob->device_list);
+ mutex_unlock(&glob->device_list_mutex);
+
+ return 0;
+out_no_sys:
+ 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->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 lazy, bool interruptible, bool no_wait)
+{
+ struct reservation_object_list *fobj;
+ struct reservation_object *resv;
+ struct fence *excl;
+ long timeout = 15 * HZ;
+ int i;
+
+ resv = bo->resv;
+ fobj = reservation_object_get_list(resv);
+ excl = reservation_object_get_excl(resv);
+ if (excl) {
+ if (!fence_is_signaled(excl)) {
+ if (no_wait)
+ return -EBUSY;
+
+ timeout = fence_wait_timeout(excl,
+ interruptible, timeout);
+ }
+ }
+
+ for (i = 0; fobj && timeout > 0 && i < fobj->shared_count; ++i) {
+ struct fence *fence;
+ fence = rcu_dereference_protected(fobj->shared[i],
+ reservation_object_held(resv));
+
+ if (!fence_is_signaled(fence)) {
+ if (no_wait)
+ return -EBUSY;
+
+ timeout = fence_wait_timeout(fence,
+ interruptible, timeout);
+ }
+ }
+
+ if (timeout < 0)
+ return timeout;
+
+ if (timeout == 0)
+ return -EBUSY;
+
+ reservation_object_add_excl_fence(resv, NULL);
+ clear_bit(TTM_BO_PRIV_FLAG_MOVING, &bo->priv_flags);
+ return 0;
+}
+EXPORT_SYMBOL(ttm_bo_wait);
+
+int ttm_bo_synccpu_write_grab(struct ttm_buffer_object *bo, bool no_wait)
+{
+ int ret = 0;
+
+ /*
+ * Using ttm_bo_reserve makes sure the lru lists are updated.
+ */
+
+ ret = ttm_bo_reserve(bo, true, no_wait, false, NULL);
+ if (unlikely(ret != 0))
+ return ret;
+ ret = ttm_bo_wait(bo, false, true, no_wait);
+ if (likely(ret == 0))
+ atomic_inc(&bo->cpu_writers);
+ ttm_bo_unreserve(bo);
+ return ret;
+}
+EXPORT_SYMBOL(ttm_bo_synccpu_write_grab);
+
+void ttm_bo_synccpu_write_release(struct ttm_buffer_object *bo)
+{
+ atomic_dec(&bo->cpu_writers);
+}
+EXPORT_SYMBOL(ttm_bo_synccpu_write_release);
+
+/**
+ * A buffer object shrink method that tries to swap out the first
+ * buffer object on the bo_global::swap_lru list.
+ */
+
+static int ttm_bo_swapout(struct ttm_mem_shrink *shrink)
+{
+ struct ttm_bo_global *glob =
+ container_of(shrink, struct ttm_bo_global, shrink);
+ struct ttm_buffer_object *bo;
+ int ret = -EBUSY;
+ int put_count;
+ uint32_t swap_placement = (TTM_PL_FLAG_CACHED | TTM_PL_FLAG_SYSTEM);
+
+ spin_lock(&glob->lru_lock);
+ list_for_each_entry(bo, &glob->swap_lru, swap) {
+ ret = __ttm_bo_reserve(bo, false, true, false, NULL);
+ if (!ret)
+ break;
+ }
+
+ if (ret) {
+ spin_unlock(&glob->lru_lock);
+ return ret;
+ }
+
+ kref_get(&bo->list_kref);
+
+ if (!list_empty(&bo->ddestroy)) {
+ ret = ttm_bo_cleanup_refs_and_unlock(bo, false, false);
+ kref_put(&bo->list_kref, ttm_bo_release_list);
+ return ret;
+ }
+
+ put_count = ttm_bo_del_from_lru(bo);
+ spin_unlock(&glob->lru_lock);
+
+ ttm_bo_list_ref_sub(bo, put_count, true);
+
+ /**
+ * Wait for GPU, then move to system cached.
+ */
+
+ ret = ttm_bo_wait(bo, false, false, false);
+
+ if (unlikely(ret != 0))
+ goto out;
+
+ if ((bo->mem.placement & swap_placement) != swap_placement) {
+ 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,
+ 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.
+ */
+
+ __ttm_bo_unreserve(bo);
+ kref_put(&bo->list_kref, ttm_bo_release_list);
+ return ret;
+}
+
+void ttm_bo_swapout_all(struct ttm_bo_device *bdev)
+{
+ while (ttm_bo_swapout(&bdev->glob->shrink) == 0)
+ ;
+}
+EXPORT_SYMBOL(ttm_bo_swapout_all);
+
+/**
+ * ttm_bo_wait_unreserved - interruptible wait for a buffer object to become
+ * unreserved
+ *
+ * @bo: Pointer to buffer
+ */
+int ttm_bo_wait_unreserved(struct ttm_buffer_object *bo)
+{
+ int ret;
+
+ /*
+ * In the absense of a wait_unlocked API,
+ * Use the bo::wu_mutex to avoid triggering livelocks due to
+ * concurrent use of this function. Note that this use of
+ * bo::wu_mutex can go away if we change locking order to
+ * mmap_sem -> bo::reserve.
+ */
+ ret = mutex_lock_interruptible(&bo->wu_mutex);
+ if (unlikely(ret != 0))
+ return -ERESTARTSYS;
+ if (!ww_mutex_is_locked(&bo->resv->lock))
+ goto out_unlock;
+ ret = __ttm_bo_reserve(bo, true, false, false, NULL);
+ if (unlikely(ret != 0))
+ goto out_unlock;
+ __ttm_bo_unreserve(bo);
+
+out_unlock:
+ mutex_unlock(&bo->wu_mutex);
+ return ret;
+}
Code Review / kvmfornfv.git / blobdiff