| // SPDX-License-Identifier: GPL-2.0 OR MIT |
| /************************************************************************** |
| * |
| * Copyright 2009-2015 VMware, Inc., Palo Alto, CA., USA |
| * |
| * 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. |
| * |
| **************************************************************************/ |
| |
| #include <drm/ttm/ttm_placement.h> |
| |
| #include "vmwgfx_resource_priv.h" |
| #include "vmwgfx_binding.h" |
| #include "vmwgfx_drv.h" |
| |
| #define VMW_RES_EVICT_ERR_COUNT 10 |
| |
| /** |
| * vmw_resource_mob_attach - Mark a resource as attached to its backing mob |
| * @res: The resource |
| */ |
| void vmw_resource_mob_attach(struct vmw_resource *res) |
| { |
| struct vmw_buffer_object *backup = res->backup; |
| struct rb_node **new = &backup->res_tree.rb_node, *parent = NULL; |
| |
| dma_resv_assert_held(res->backup->base.base.resv); |
| res->used_prio = (res->res_dirty) ? res->func->dirty_prio : |
| res->func->prio; |
| |
| while (*new) { |
| struct vmw_resource *this = |
| container_of(*new, struct vmw_resource, mob_node); |
| |
| parent = *new; |
| new = (res->backup_offset < this->backup_offset) ? |
| &((*new)->rb_left) : &((*new)->rb_right); |
| } |
| |
| rb_link_node(&res->mob_node, parent, new); |
| rb_insert_color(&res->mob_node, &backup->res_tree); |
| |
| vmw_bo_prio_add(backup, res->used_prio); |
| } |
| |
| /** |
| * vmw_resource_mob_detach - Mark a resource as detached from its backing mob |
| * @res: The resource |
| */ |
| void vmw_resource_mob_detach(struct vmw_resource *res) |
| { |
| struct vmw_buffer_object *backup = res->backup; |
| |
| dma_resv_assert_held(backup->base.base.resv); |
| if (vmw_resource_mob_attached(res)) { |
| rb_erase(&res->mob_node, &backup->res_tree); |
| RB_CLEAR_NODE(&res->mob_node); |
| vmw_bo_prio_del(backup, res->used_prio); |
| } |
| } |
| |
| struct vmw_resource *vmw_resource_reference(struct vmw_resource *res) |
| { |
| kref_get(&res->kref); |
| return res; |
| } |
| |
| struct vmw_resource * |
| vmw_resource_reference_unless_doomed(struct vmw_resource *res) |
| { |
| return kref_get_unless_zero(&res->kref) ? res : NULL; |
| } |
| |
| /** |
| * vmw_resource_release_id - release a resource id to the id manager. |
| * |
| * @res: Pointer to the resource. |
| * |
| * Release the resource id to the resource id manager and set it to -1 |
| */ |
| void vmw_resource_release_id(struct vmw_resource *res) |
| { |
| struct vmw_private *dev_priv = res->dev_priv; |
| struct idr *idr = &dev_priv->res_idr[res->func->res_type]; |
| |
| spin_lock(&dev_priv->resource_lock); |
| if (res->id != -1) |
| idr_remove(idr, res->id); |
| res->id = -1; |
| spin_unlock(&dev_priv->resource_lock); |
| } |
| |
| static void vmw_resource_release(struct kref *kref) |
| { |
| struct vmw_resource *res = |
| container_of(kref, struct vmw_resource, kref); |
| struct vmw_private *dev_priv = res->dev_priv; |
| int id; |
| struct idr *idr = &dev_priv->res_idr[res->func->res_type]; |
| |
| spin_lock(&dev_priv->resource_lock); |
| list_del_init(&res->lru_head); |
| spin_unlock(&dev_priv->resource_lock); |
| if (res->backup) { |
| struct ttm_buffer_object *bo = &res->backup->base; |
| |
| ttm_bo_reserve(bo, false, false, NULL); |
| if (vmw_resource_mob_attached(res) && |
| res->func->unbind != NULL) { |
| struct ttm_validate_buffer val_buf; |
| |
| val_buf.bo = bo; |
| val_buf.num_shared = 0; |
| res->func->unbind(res, false, &val_buf); |
| } |
| res->backup_dirty = false; |
| vmw_resource_mob_detach(res); |
| if (res->dirty) |
| res->func->dirty_free(res); |
| if (res->coherent) |
| vmw_bo_dirty_release(res->backup); |
| ttm_bo_unreserve(bo); |
| vmw_bo_unreference(&res->backup); |
| } |
| |
| if (likely(res->hw_destroy != NULL)) { |
| mutex_lock(&dev_priv->binding_mutex); |
| vmw_binding_res_list_kill(&res->binding_head); |
| mutex_unlock(&dev_priv->binding_mutex); |
| res->hw_destroy(res); |
| } |
| |
| id = res->id; |
| if (res->res_free != NULL) |
| res->res_free(res); |
| else |
| kfree(res); |
| |
| spin_lock(&dev_priv->resource_lock); |
| if (id != -1) |
| idr_remove(idr, id); |
| spin_unlock(&dev_priv->resource_lock); |
| } |
| |
| void vmw_resource_unreference(struct vmw_resource **p_res) |
| { |
| struct vmw_resource *res = *p_res; |
| |
| *p_res = NULL; |
| kref_put(&res->kref, vmw_resource_release); |
| } |
| |
| |
| /** |
| * vmw_resource_alloc_id - release a resource id to the id manager. |
| * |
| * @res: Pointer to the resource. |
| * |
| * Allocate the lowest free resource from the resource manager, and set |
| * @res->id to that id. Returns 0 on success and -ENOMEM on failure. |
| */ |
| int vmw_resource_alloc_id(struct vmw_resource *res) |
| { |
| struct vmw_private *dev_priv = res->dev_priv; |
| int ret; |
| struct idr *idr = &dev_priv->res_idr[res->func->res_type]; |
| |
| BUG_ON(res->id != -1); |
| |
| idr_preload(GFP_KERNEL); |
| spin_lock(&dev_priv->resource_lock); |
| |
| ret = idr_alloc(idr, res, 1, 0, GFP_NOWAIT); |
| if (ret >= 0) |
| res->id = ret; |
| |
| spin_unlock(&dev_priv->resource_lock); |
| idr_preload_end(); |
| return ret < 0 ? ret : 0; |
| } |
| |
| /** |
| * vmw_resource_init - initialize a struct vmw_resource |
| * |
| * @dev_priv: Pointer to a device private struct. |
| * @res: The struct vmw_resource to initialize. |
| * @obj_type: Resource object type. |
| * @delay_id: Boolean whether to defer device id allocation until |
| * the first validation. |
| * @res_free: Resource destructor. |
| * @func: Resource function table. |
| */ |
| int vmw_resource_init(struct vmw_private *dev_priv, struct vmw_resource *res, |
| bool delay_id, |
| void (*res_free) (struct vmw_resource *res), |
| const struct vmw_res_func *func) |
| { |
| kref_init(&res->kref); |
| res->hw_destroy = NULL; |
| res->res_free = res_free; |
| res->dev_priv = dev_priv; |
| res->func = func; |
| RB_CLEAR_NODE(&res->mob_node); |
| INIT_LIST_HEAD(&res->lru_head); |
| INIT_LIST_HEAD(&res->binding_head); |
| res->id = -1; |
| res->backup = NULL; |
| res->backup_offset = 0; |
| res->backup_dirty = false; |
| res->res_dirty = false; |
| res->coherent = false; |
| res->used_prio = 3; |
| res->dirty = NULL; |
| if (delay_id) |
| return 0; |
| else |
| return vmw_resource_alloc_id(res); |
| } |
| |
| |
| /** |
| * vmw_user_resource_lookup_handle - lookup a struct resource from a |
| * TTM user-space handle and perform basic type checks |
| * |
| * @dev_priv: Pointer to a device private struct |
| * @tfile: Pointer to a struct ttm_object_file identifying the caller |
| * @handle: The TTM user-space handle |
| * @converter: Pointer to an object describing the resource type |
| * @p_res: On successful return the location pointed to will contain |
| * a pointer to a refcounted struct vmw_resource. |
| * |
| * If the handle can't be found or is associated with an incorrect resource |
| * type, -EINVAL will be returned. |
| */ |
| int vmw_user_resource_lookup_handle(struct vmw_private *dev_priv, |
| struct ttm_object_file *tfile, |
| uint32_t handle, |
| const struct vmw_user_resource_conv |
| *converter, |
| struct vmw_resource **p_res) |
| { |
| struct ttm_base_object *base; |
| struct vmw_resource *res; |
| int ret = -EINVAL; |
| |
| base = ttm_base_object_lookup(tfile, handle); |
| if (unlikely(base == NULL)) |
| return -EINVAL; |
| |
| if (unlikely(ttm_base_object_type(base) != converter->object_type)) |
| goto out_bad_resource; |
| |
| res = converter->base_obj_to_res(base); |
| kref_get(&res->kref); |
| |
| *p_res = res; |
| ret = 0; |
| |
| out_bad_resource: |
| ttm_base_object_unref(&base); |
| |
| return ret; |
| } |
| |
| /** |
| * vmw_user_resource_lookup_handle - lookup a struct resource from a |
| * TTM user-space handle and perform basic type checks |
| * |
| * @dev_priv: Pointer to a device private struct |
| * @tfile: Pointer to a struct ttm_object_file identifying the caller |
| * @handle: The TTM user-space handle |
| * @converter: Pointer to an object describing the resource type |
| * @p_res: On successful return the location pointed to will contain |
| * a pointer to a refcounted struct vmw_resource. |
| * |
| * If the handle can't be found or is associated with an incorrect resource |
| * type, -EINVAL will be returned. |
| */ |
| struct vmw_resource * |
| vmw_user_resource_noref_lookup_handle(struct vmw_private *dev_priv, |
| struct ttm_object_file *tfile, |
| uint32_t handle, |
| const struct vmw_user_resource_conv |
| *converter) |
| { |
| struct ttm_base_object *base; |
| |
| base = ttm_base_object_noref_lookup(tfile, handle); |
| if (!base) |
| return ERR_PTR(-ESRCH); |
| |
| if (unlikely(ttm_base_object_type(base) != converter->object_type)) { |
| ttm_base_object_noref_release(); |
| return ERR_PTR(-EINVAL); |
| } |
| |
| return converter->base_obj_to_res(base); |
| } |
| |
| /** |
| * Helper function that looks either a surface or bo. |
| * |
| * The pointer this pointed at by out_surf and out_buf needs to be null. |
| */ |
| int vmw_user_lookup_handle(struct vmw_private *dev_priv, |
| struct ttm_object_file *tfile, |
| uint32_t handle, |
| struct vmw_surface **out_surf, |
| struct vmw_buffer_object **out_buf) |
| { |
| struct vmw_resource *res; |
| int ret; |
| |
| BUG_ON(*out_surf || *out_buf); |
| |
| ret = vmw_user_resource_lookup_handle(dev_priv, tfile, handle, |
| user_surface_converter, |
| &res); |
| if (!ret) { |
| *out_surf = vmw_res_to_srf(res); |
| return 0; |
| } |
| |
| *out_surf = NULL; |
| ret = vmw_user_bo_lookup(tfile, handle, out_buf, NULL); |
| return ret; |
| } |
| |
| /** |
| * vmw_resource_buf_alloc - Allocate a backup buffer for a resource. |
| * |
| * @res: The resource for which to allocate a backup buffer. |
| * @interruptible: Whether any sleeps during allocation should be |
| * performed while interruptible. |
| */ |
| static int vmw_resource_buf_alloc(struct vmw_resource *res, |
| bool interruptible) |
| { |
| unsigned long size = |
| (res->backup_size + PAGE_SIZE - 1) & PAGE_MASK; |
| struct vmw_buffer_object *backup; |
| int ret; |
| |
| if (likely(res->backup)) { |
| BUG_ON(res->backup->base.base.size < size); |
| return 0; |
| } |
| |
| backup = kzalloc(sizeof(*backup), GFP_KERNEL); |
| if (unlikely(!backup)) |
| return -ENOMEM; |
| |
| ret = vmw_bo_init(res->dev_priv, backup, res->backup_size, |
| res->func->backup_placement, |
| interruptible, false, |
| &vmw_bo_bo_free); |
| if (unlikely(ret != 0)) |
| goto out_no_bo; |
| |
| res->backup = backup; |
| |
| out_no_bo: |
| return ret; |
| } |
| |
| /** |
| * vmw_resource_do_validate - Make a resource up-to-date and visible |
| * to the device. |
| * |
| * @res: The resource to make visible to the device. |
| * @val_buf: Information about a buffer possibly |
| * containing backup data if a bind operation is needed. |
| * |
| * On hardware resource shortage, this function returns -EBUSY and |
| * should be retried once resources have been freed up. |
| */ |
| static int vmw_resource_do_validate(struct vmw_resource *res, |
| struct ttm_validate_buffer *val_buf, |
| bool dirtying) |
| { |
| int ret = 0; |
| const struct vmw_res_func *func = res->func; |
| |
| if (unlikely(res->id == -1)) { |
| ret = func->create(res); |
| if (unlikely(ret != 0)) |
| return ret; |
| } |
| |
| if (func->bind && |
| ((func->needs_backup && !vmw_resource_mob_attached(res) && |
| val_buf->bo != NULL) || |
| (!func->needs_backup && val_buf->bo != NULL))) { |
| ret = func->bind(res, val_buf); |
| if (unlikely(ret != 0)) |
| goto out_bind_failed; |
| if (func->needs_backup) |
| vmw_resource_mob_attach(res); |
| } |
| |
| /* |
| * Handle the case where the backup mob is marked coherent but |
| * the resource isn't. |
| */ |
| if (func->dirty_alloc && vmw_resource_mob_attached(res) && |
| !res->coherent) { |
| if (res->backup->dirty && !res->dirty) { |
| ret = func->dirty_alloc(res); |
| if (ret) |
| return ret; |
| } else if (!res->backup->dirty && res->dirty) { |
| func->dirty_free(res); |
| } |
| } |
| |
| /* |
| * Transfer the dirty regions to the resource and update |
| * the resource. |
| */ |
| if (res->dirty) { |
| if (dirtying && !res->res_dirty) { |
| pgoff_t start = res->backup_offset >> PAGE_SHIFT; |
| pgoff_t end = __KERNEL_DIV_ROUND_UP |
| (res->backup_offset + res->backup_size, |
| PAGE_SIZE); |
| |
| vmw_bo_dirty_unmap(res->backup, start, end); |
| } |
| |
| vmw_bo_dirty_transfer_to_res(res); |
| return func->dirty_sync(res); |
| } |
| |
| return 0; |
| |
| out_bind_failed: |
| func->destroy(res); |
| |
| return ret; |
| } |
| |
| /** |
| * vmw_resource_unreserve - Unreserve a resource previously reserved for |
| * command submission. |
| * |
| * @res: Pointer to the struct vmw_resource to unreserve. |
| * @dirty_set: Change dirty status of the resource. |
| * @dirty: When changing dirty status indicates the new status. |
| * @switch_backup: Backup buffer has been switched. |
| * @new_backup: Pointer to new backup buffer if command submission |
| * switched. May be NULL. |
| * @new_backup_offset: New backup offset if @switch_backup is true. |
| * |
| * Currently unreserving a resource means putting it back on the device's |
| * resource lru list, so that it can be evicted if necessary. |
| */ |
| void vmw_resource_unreserve(struct vmw_resource *res, |
| bool dirty_set, |
| bool dirty, |
| bool switch_backup, |
| struct vmw_buffer_object *new_backup, |
| unsigned long new_backup_offset) |
| { |
| struct vmw_private *dev_priv = res->dev_priv; |
| |
| if (!list_empty(&res->lru_head)) |
| return; |
| |
| if (switch_backup && new_backup != res->backup) { |
| if (res->backup) { |
| vmw_resource_mob_detach(res); |
| if (res->coherent) |
| vmw_bo_dirty_release(res->backup); |
| vmw_bo_unreference(&res->backup); |
| } |
| |
| if (new_backup) { |
| res->backup = vmw_bo_reference(new_backup); |
| |
| /* |
| * The validation code should already have added a |
| * dirty tracker here. |
| */ |
| WARN_ON(res->coherent && !new_backup->dirty); |
| |
| vmw_resource_mob_attach(res); |
| } else { |
| res->backup = NULL; |
| } |
| } else if (switch_backup && res->coherent) { |
| vmw_bo_dirty_release(res->backup); |
| } |
| |
| if (switch_backup) |
| res->backup_offset = new_backup_offset; |
| |
| if (dirty_set) |
| res->res_dirty = dirty; |
| |
| if (!res->func->may_evict || res->id == -1 || res->pin_count) |
| return; |
| |
| spin_lock(&dev_priv->resource_lock); |
| list_add_tail(&res->lru_head, |
| &res->dev_priv->res_lru[res->func->res_type]); |
| spin_unlock(&dev_priv->resource_lock); |
| } |
| |
| /** |
| * vmw_resource_check_buffer - Check whether a backup buffer is needed |
| * for a resource and in that case, allocate |
| * one, reserve and validate it. |
| * |
| * @ticket: The ww aqcquire context to use, or NULL if trylocking. |
| * @res: The resource for which to allocate a backup buffer. |
| * @interruptible: Whether any sleeps during allocation should be |
| * performed while interruptible. |
| * @val_buf: On successful return contains data about the |
| * reserved and validated backup buffer. |
| */ |
| static int |
| vmw_resource_check_buffer(struct ww_acquire_ctx *ticket, |
| struct vmw_resource *res, |
| bool interruptible, |
| struct ttm_validate_buffer *val_buf) |
| { |
| struct ttm_operation_ctx ctx = { true, false }; |
| struct list_head val_list; |
| bool backup_dirty = false; |
| int ret; |
| |
| if (unlikely(res->backup == NULL)) { |
| ret = vmw_resource_buf_alloc(res, interruptible); |
| if (unlikely(ret != 0)) |
| return ret; |
| } |
| |
| INIT_LIST_HEAD(&val_list); |
| ttm_bo_get(&res->backup->base); |
| val_buf->bo = &res->backup->base; |
| val_buf->num_shared = 0; |
| list_add_tail(&val_buf->head, &val_list); |
| ret = ttm_eu_reserve_buffers(ticket, &val_list, interruptible, NULL); |
| if (unlikely(ret != 0)) |
| goto out_no_reserve; |
| |
| if (res->func->needs_backup && !vmw_resource_mob_attached(res)) |
| return 0; |
| |
| backup_dirty = res->backup_dirty; |
| ret = ttm_bo_validate(&res->backup->base, |
| res->func->backup_placement, |
| &ctx); |
| |
| if (unlikely(ret != 0)) |
| goto out_no_validate; |
| |
| return 0; |
| |
| out_no_validate: |
| ttm_eu_backoff_reservation(ticket, &val_list); |
| out_no_reserve: |
| ttm_bo_put(val_buf->bo); |
| val_buf->bo = NULL; |
| if (backup_dirty) |
| vmw_bo_unreference(&res->backup); |
| |
| return ret; |
| } |
| |
| /** |
| * vmw_resource_reserve - Reserve a resource for command submission |
| * |
| * @res: The resource to reserve. |
| * |
| * This function takes the resource off the LRU list and make sure |
| * a backup buffer is present for guest-backed resources. However, |
| * the buffer may not be bound to the resource at this point. |
| * |
| */ |
| int vmw_resource_reserve(struct vmw_resource *res, bool interruptible, |
| bool no_backup) |
| { |
| struct vmw_private *dev_priv = res->dev_priv; |
| int ret; |
| |
| spin_lock(&dev_priv->resource_lock); |
| list_del_init(&res->lru_head); |
| spin_unlock(&dev_priv->resource_lock); |
| |
| if (res->func->needs_backup && res->backup == NULL && |
| !no_backup) { |
| ret = vmw_resource_buf_alloc(res, interruptible); |
| if (unlikely(ret != 0)) { |
| DRM_ERROR("Failed to allocate a backup buffer " |
| "of size %lu. bytes\n", |
| (unsigned long) res->backup_size); |
| return ret; |
| } |
| } |
| |
| return 0; |
| } |
| |
| /** |
| * vmw_resource_backoff_reservation - Unreserve and unreference a |
| * backup buffer |
| *. |
| * @ticket: The ww acquire ctx used for reservation. |
| * @val_buf: Backup buffer information. |
| */ |
| static void |
| vmw_resource_backoff_reservation(struct ww_acquire_ctx *ticket, |
| struct ttm_validate_buffer *val_buf) |
| { |
| struct list_head val_list; |
| |
| if (likely(val_buf->bo == NULL)) |
| return; |
| |
| INIT_LIST_HEAD(&val_list); |
| list_add_tail(&val_buf->head, &val_list); |
| ttm_eu_backoff_reservation(ticket, &val_list); |
| ttm_bo_put(val_buf->bo); |
| val_buf->bo = NULL; |
| } |
| |
| /** |
| * vmw_resource_do_evict - Evict a resource, and transfer its data |
| * to a backup buffer. |
| * |
| * @ticket: The ww acquire ticket to use, or NULL if trylocking. |
| * @res: The resource to evict. |
| * @interruptible: Whether to wait interruptible. |
| */ |
| static int vmw_resource_do_evict(struct ww_acquire_ctx *ticket, |
| struct vmw_resource *res, bool interruptible) |
| { |
| struct ttm_validate_buffer val_buf; |
| const struct vmw_res_func *func = res->func; |
| int ret; |
| |
| BUG_ON(!func->may_evict); |
| |
| val_buf.bo = NULL; |
| val_buf.num_shared = 0; |
| ret = vmw_resource_check_buffer(ticket, res, interruptible, &val_buf); |
| if (unlikely(ret != 0)) |
| return ret; |
| |
| if (unlikely(func->unbind != NULL && |
| (!func->needs_backup || vmw_resource_mob_attached(res)))) { |
| ret = func->unbind(res, res->res_dirty, &val_buf); |
| if (unlikely(ret != 0)) |
| goto out_no_unbind; |
| vmw_resource_mob_detach(res); |
| } |
| ret = func->destroy(res); |
| res->backup_dirty = true; |
| res->res_dirty = false; |
| out_no_unbind: |
| vmw_resource_backoff_reservation(ticket, &val_buf); |
| |
| return ret; |
| } |
| |
| |
| /** |
| * vmw_resource_validate - Make a resource up-to-date and visible |
| * to the device. |
| * @res: The resource to make visible to the device. |
| * @intr: Perform waits interruptible if possible. |
| * @dirtying: Pending GPU operation will dirty the resource |
| * |
| * On succesful return, any backup DMA buffer pointed to by @res->backup will |
| * be reserved and validated. |
| * On hardware resource shortage, this function will repeatedly evict |
| * resources of the same type until the validation succeeds. |
| * |
| * Return: Zero on success, -ERESTARTSYS if interrupted, negative error code |
| * on failure. |
| */ |
| int vmw_resource_validate(struct vmw_resource *res, bool intr, |
| bool dirtying) |
| { |
| int ret; |
| struct vmw_resource *evict_res; |
| struct vmw_private *dev_priv = res->dev_priv; |
| struct list_head *lru_list = &dev_priv->res_lru[res->func->res_type]; |
| struct ttm_validate_buffer val_buf; |
| unsigned err_count = 0; |
| |
| if (!res->func->create) |
| return 0; |
| |
| val_buf.bo = NULL; |
| val_buf.num_shared = 0; |
| if (res->backup) |
| val_buf.bo = &res->backup->base; |
| do { |
| ret = vmw_resource_do_validate(res, &val_buf, dirtying); |
| if (likely(ret != -EBUSY)) |
| break; |
| |
| spin_lock(&dev_priv->resource_lock); |
| if (list_empty(lru_list) || !res->func->may_evict) { |
| DRM_ERROR("Out of device device resources " |
| "for %s.\n", res->func->type_name); |
| ret = -EBUSY; |
| spin_unlock(&dev_priv->resource_lock); |
| break; |
| } |
| |
| evict_res = vmw_resource_reference |
| (list_first_entry(lru_list, struct vmw_resource, |
| lru_head)); |
| list_del_init(&evict_res->lru_head); |
| |
| spin_unlock(&dev_priv->resource_lock); |
| |
| /* Trylock backup buffers with a NULL ticket. */ |
| ret = vmw_resource_do_evict(NULL, evict_res, intr); |
| if (unlikely(ret != 0)) { |
| spin_lock(&dev_priv->resource_lock); |
| list_add_tail(&evict_res->lru_head, lru_list); |
| spin_unlock(&dev_priv->resource_lock); |
| if (ret == -ERESTARTSYS || |
| ++err_count > VMW_RES_EVICT_ERR_COUNT) { |
| vmw_resource_unreference(&evict_res); |
| goto out_no_validate; |
| } |
| } |
| |
| vmw_resource_unreference(&evict_res); |
| } while (1); |
| |
| if (unlikely(ret != 0)) |
| goto out_no_validate; |
| else if (!res->func->needs_backup && res->backup) { |
| WARN_ON_ONCE(vmw_resource_mob_attached(res)); |
| vmw_bo_unreference(&res->backup); |
| } |
| |
| return 0; |
| |
| out_no_validate: |
| return ret; |
| } |
| |
| |
| /** |
| * vmw_resource_unbind_list |
| * |
| * @vbo: Pointer to the current backing MOB. |
| * |
| * Evicts the Guest Backed hardware resource if the backup |
| * buffer is being moved out of MOB memory. |
| * Note that this function will not race with the resource |
| * validation code, since resource validation and eviction |
| * both require the backup buffer to be reserved. |
| */ |
| void vmw_resource_unbind_list(struct vmw_buffer_object *vbo) |
| { |
| struct ttm_validate_buffer val_buf = { |
| .bo = &vbo->base, |
| .num_shared = 0 |
| }; |
| |
| dma_resv_assert_held(vbo->base.base.resv); |
| while (!RB_EMPTY_ROOT(&vbo->res_tree)) { |
| struct rb_node *node = vbo->res_tree.rb_node; |
| struct vmw_resource *res = |
| container_of(node, struct vmw_resource, mob_node); |
| |
| if (!WARN_ON_ONCE(!res->func->unbind)) |
| (void) res->func->unbind(res, res->res_dirty, &val_buf); |
| |
| res->backup_dirty = true; |
| res->res_dirty = false; |
| vmw_resource_mob_detach(res); |
| } |
| |
| (void) ttm_bo_wait(&vbo->base, false, false); |
| } |
| |
| |
| /** |
| * vmw_query_readback_all - Read back cached query states |
| * |
| * @dx_query_mob: Buffer containing the DX query MOB |
| * |
| * Read back cached states from the device if they exist. This function |
| * assumings binding_mutex is held. |
| */ |
| int vmw_query_readback_all(struct vmw_buffer_object *dx_query_mob) |
| { |
| struct vmw_resource *dx_query_ctx; |
| struct vmw_private *dev_priv; |
| struct { |
| SVGA3dCmdHeader header; |
| SVGA3dCmdDXReadbackAllQuery body; |
| } *cmd; |
| |
| |
| /* No query bound, so do nothing */ |
| if (!dx_query_mob || !dx_query_mob->dx_query_ctx) |
| return 0; |
| |
| dx_query_ctx = dx_query_mob->dx_query_ctx; |
| dev_priv = dx_query_ctx->dev_priv; |
| |
| cmd = VMW_CMD_CTX_RESERVE(dev_priv, sizeof(*cmd), dx_query_ctx->id); |
| if (unlikely(cmd == NULL)) |
| return -ENOMEM; |
| |
| cmd->header.id = SVGA_3D_CMD_DX_READBACK_ALL_QUERY; |
| cmd->header.size = sizeof(cmd->body); |
| cmd->body.cid = dx_query_ctx->id; |
| |
| vmw_cmd_commit(dev_priv, sizeof(*cmd)); |
| |
| /* Triggers a rebind the next time affected context is bound */ |
| dx_query_mob->dx_query_ctx = NULL; |
| |
| return 0; |
| } |
| |
| |
| |
| /** |
| * vmw_query_move_notify - Read back cached query states |
| * |
| * @bo: The TTM buffer object about to move. |
| * @mem: The memory region @bo is moving to. |
| * |
| * Called before the query MOB is swapped out to read back cached query |
| * states from the device. |
| */ |
| void vmw_query_move_notify(struct ttm_buffer_object *bo, |
| struct ttm_resource *mem) |
| { |
| struct vmw_buffer_object *dx_query_mob; |
| struct ttm_bo_device *bdev = bo->bdev; |
| struct vmw_private *dev_priv; |
| |
| |
| dev_priv = container_of(bdev, struct vmw_private, bdev); |
| |
| mutex_lock(&dev_priv->binding_mutex); |
| |
| dx_query_mob = container_of(bo, struct vmw_buffer_object, base); |
| if (!dx_query_mob || !dx_query_mob->dx_query_ctx) { |
| mutex_unlock(&dev_priv->binding_mutex); |
| return; |
| } |
| |
| /* If BO is being moved from MOB to system memory */ |
| if (mem->mem_type == TTM_PL_SYSTEM && bo->mem.mem_type == VMW_PL_MOB) { |
| struct vmw_fence_obj *fence; |
| |
| (void) vmw_query_readback_all(dx_query_mob); |
| mutex_unlock(&dev_priv->binding_mutex); |
| |
| /* Create a fence and attach the BO to it */ |
| (void) vmw_execbuf_fence_commands(NULL, dev_priv, &fence, NULL); |
| vmw_bo_fence_single(bo, fence); |
| |
| if (fence != NULL) |
| vmw_fence_obj_unreference(&fence); |
| |
| (void) ttm_bo_wait(bo, false, false); |
| } else |
| mutex_unlock(&dev_priv->binding_mutex); |
| |
| } |
| |
| /** |
| * vmw_resource_needs_backup - Return whether a resource needs a backup buffer. |
| * |
| * @res: The resource being queried. |
| */ |
| bool vmw_resource_needs_backup(const struct vmw_resource *res) |
| { |
| return res->func->needs_backup; |
| } |
| |
| /** |
| * vmw_resource_evict_type - Evict all resources of a specific type |
| * |
| * @dev_priv: Pointer to a device private struct |
| * @type: The resource type to evict |
| * |
| * To avoid thrashing starvation or as part of the hibernation sequence, |
| * try to evict all evictable resources of a specific type. |
| */ |
| static void vmw_resource_evict_type(struct vmw_private *dev_priv, |
| enum vmw_res_type type) |
| { |
| struct list_head *lru_list = &dev_priv->res_lru[type]; |
| struct vmw_resource *evict_res; |
| unsigned err_count = 0; |
| int ret; |
| struct ww_acquire_ctx ticket; |
| |
| do { |
| spin_lock(&dev_priv->resource_lock); |
| |
| if (list_empty(lru_list)) |
| goto out_unlock; |
| |
| evict_res = vmw_resource_reference( |
| list_first_entry(lru_list, struct vmw_resource, |
| lru_head)); |
| list_del_init(&evict_res->lru_head); |
| spin_unlock(&dev_priv->resource_lock); |
| |
| /* Wait lock backup buffers with a ticket. */ |
| ret = vmw_resource_do_evict(&ticket, evict_res, false); |
| if (unlikely(ret != 0)) { |
| spin_lock(&dev_priv->resource_lock); |
| list_add_tail(&evict_res->lru_head, lru_list); |
| spin_unlock(&dev_priv->resource_lock); |
| if (++err_count > VMW_RES_EVICT_ERR_COUNT) { |
| vmw_resource_unreference(&evict_res); |
| return; |
| } |
| } |
| |
| vmw_resource_unreference(&evict_res); |
| } while (1); |
| |
| out_unlock: |
| spin_unlock(&dev_priv->resource_lock); |
| } |
| |
| /** |
| * vmw_resource_evict_all - Evict all evictable resources |
| * |
| * @dev_priv: Pointer to a device private struct |
| * |
| * To avoid thrashing starvation or as part of the hibernation sequence, |
| * evict all evictable resources. In particular this means that all |
| * guest-backed resources that are registered with the device are |
| * evicted and the OTable becomes clean. |
| */ |
| void vmw_resource_evict_all(struct vmw_private *dev_priv) |
| { |
| enum vmw_res_type type; |
| |
| mutex_lock(&dev_priv->cmdbuf_mutex); |
| |
| for (type = 0; type < vmw_res_max; ++type) |
| vmw_resource_evict_type(dev_priv, type); |
| |
| mutex_unlock(&dev_priv->cmdbuf_mutex); |
| } |
| |
| /** |
| * vmw_resource_pin - Add a pin reference on a resource |
| * |
| * @res: The resource to add a pin reference on |
| * |
| * This function adds a pin reference, and if needed validates the resource. |
| * Having a pin reference means that the resource can never be evicted, and |
| * its id will never change as long as there is a pin reference. |
| * This function returns 0 on success and a negative error code on failure. |
| */ |
| int vmw_resource_pin(struct vmw_resource *res, bool interruptible) |
| { |
| struct ttm_operation_ctx ctx = { interruptible, false }; |
| struct vmw_private *dev_priv = res->dev_priv; |
| int ret; |
| |
| ttm_write_lock(&dev_priv->reservation_sem, interruptible); |
| mutex_lock(&dev_priv->cmdbuf_mutex); |
| ret = vmw_resource_reserve(res, interruptible, false); |
| if (ret) |
| goto out_no_reserve; |
| |
| if (res->pin_count == 0) { |
| struct vmw_buffer_object *vbo = NULL; |
| |
| if (res->backup) { |
| vbo = res->backup; |
| |
| ttm_bo_reserve(&vbo->base, interruptible, false, NULL); |
| if (!vbo->base.pin_count) { |
| ret = ttm_bo_validate |
| (&vbo->base, |
| res->func->backup_placement, |
| &ctx); |
| if (ret) { |
| ttm_bo_unreserve(&vbo->base); |
| goto out_no_validate; |
| } |
| } |
| |
| /* Do we really need to pin the MOB as well? */ |
| vmw_bo_pin_reserved(vbo, true); |
| } |
| ret = vmw_resource_validate(res, interruptible, true); |
| if (vbo) |
| ttm_bo_unreserve(&vbo->base); |
| if (ret) |
| goto out_no_validate; |
| } |
| res->pin_count++; |
| |
| out_no_validate: |
| vmw_resource_unreserve(res, false, false, false, NULL, 0UL); |
| out_no_reserve: |
| mutex_unlock(&dev_priv->cmdbuf_mutex); |
| ttm_write_unlock(&dev_priv->reservation_sem); |
| |
| return ret; |
| } |
| |
| /** |
| * vmw_resource_unpin - Remove a pin reference from a resource |
| * |
| * @res: The resource to remove a pin reference from |
| * |
| * Having a pin reference means that the resource can never be evicted, and |
| * its id will never change as long as there is a pin reference. |
| */ |
| void vmw_resource_unpin(struct vmw_resource *res) |
| { |
| struct vmw_private *dev_priv = res->dev_priv; |
| int ret; |
| |
| (void) ttm_read_lock(&dev_priv->reservation_sem, false); |
| mutex_lock(&dev_priv->cmdbuf_mutex); |
| |
| ret = vmw_resource_reserve(res, false, true); |
| WARN_ON(ret); |
| |
| WARN_ON(res->pin_count == 0); |
| if (--res->pin_count == 0 && res->backup) { |
| struct vmw_buffer_object *vbo = res->backup; |
| |
| (void) ttm_bo_reserve(&vbo->base, false, false, NULL); |
| vmw_bo_pin_reserved(vbo, false); |
| ttm_bo_unreserve(&vbo->base); |
| } |
| |
| vmw_resource_unreserve(res, false, false, false, NULL, 0UL); |
| |
| mutex_unlock(&dev_priv->cmdbuf_mutex); |
| ttm_read_unlock(&dev_priv->reservation_sem); |
| } |
| |
| /** |
| * vmw_res_type - Return the resource type |
| * |
| * @res: Pointer to the resource |
| */ |
| enum vmw_res_type vmw_res_type(const struct vmw_resource *res) |
| { |
| return res->func->res_type; |
| } |
| |
| /** |
| * vmw_resource_update_dirty - Update a resource's dirty tracker with a |
| * sequential range of touched backing store memory. |
| * @res: The resource. |
| * @start: The first page touched. |
| * @end: The last page touched + 1. |
| */ |
| void vmw_resource_dirty_update(struct vmw_resource *res, pgoff_t start, |
| pgoff_t end) |
| { |
| if (res->dirty) |
| res->func->dirty_range_add(res, start << PAGE_SHIFT, |
| end << PAGE_SHIFT); |
| } |
| |
| /** |
| * vmw_resources_clean - Clean resources intersecting a mob range |
| * @vbo: The mob buffer object |
| * @start: The mob page offset starting the range |
| * @end: The mob page offset ending the range |
| * @num_prefault: Returns how many pages including the first have been |
| * cleaned and are ok to prefault |
| */ |
| int vmw_resources_clean(struct vmw_buffer_object *vbo, pgoff_t start, |
| pgoff_t end, pgoff_t *num_prefault) |
| { |
| struct rb_node *cur = vbo->res_tree.rb_node; |
| struct vmw_resource *found = NULL; |
| unsigned long res_start = start << PAGE_SHIFT; |
| unsigned long res_end = end << PAGE_SHIFT; |
| unsigned long last_cleaned = 0; |
| |
| /* |
| * Find the resource with lowest backup_offset that intersects the |
| * range. |
| */ |
| while (cur) { |
| struct vmw_resource *cur_res = |
| container_of(cur, struct vmw_resource, mob_node); |
| |
| if (cur_res->backup_offset >= res_end) { |
| cur = cur->rb_left; |
| } else if (cur_res->backup_offset + cur_res->backup_size <= |
| res_start) { |
| cur = cur->rb_right; |
| } else { |
| found = cur_res; |
| cur = cur->rb_left; |
| /* Continue to look for resources with lower offsets */ |
| } |
| } |
| |
| /* |
| * In order of increasing backup_offset, clean dirty resorces |
| * intersecting the range. |
| */ |
| while (found) { |
| if (found->res_dirty) { |
| int ret; |
| |
| if (!found->func->clean) |
| return -EINVAL; |
| |
| ret = found->func->clean(found); |
| if (ret) |
| return ret; |
| |
| found->res_dirty = false; |
| } |
| last_cleaned = found->backup_offset + found->backup_size; |
| cur = rb_next(&found->mob_node); |
| if (!cur) |
| break; |
| |
| found = container_of(cur, struct vmw_resource, mob_node); |
| if (found->backup_offset >= res_end) |
| break; |
| } |
| |
| /* |
| * Set number of pages allowed prefaulting and fence the buffer object |
| */ |
| *num_prefault = 1; |
| if (last_cleaned > res_start) { |
| struct ttm_buffer_object *bo = &vbo->base; |
| |
| *num_prefault = __KERNEL_DIV_ROUND_UP(last_cleaned - res_start, |
| PAGE_SIZE); |
| vmw_bo_fence_single(bo, NULL); |
| if (bo->moving) |
| dma_fence_put(bo->moving); |
| bo->moving = dma_fence_get |
| (dma_resv_get_excl(bo->base.resv)); |
| } |
| |
| return 0; |
| } |