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fb80edb0d7
Similar to write-coherent resources, make sure that from the user-space point of view, GPU rendered contents is automatically available for reading by the CPU. Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Matthew Wilcox <willy@infradead.org> Cc: Will Deacon <will.deacon@arm.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rik van Riel <riel@surriel.com> Cc: Minchan Kim <minchan@kernel.org> Cc: Michal Hocko <mhocko@suse.com> Cc: Huang Ying <ying.huang@intel.com> Cc: Jérôme Glisse <jglisse@redhat.com> Cc: Kirill A. Shutemov <kirill@shutemov.name> Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com> Reviewed-by: Deepak Rawat <drawat@vmware.com>
1177 lines
31 KiB
C
1177 lines
31 KiB
C
// SPDX-License-Identifier: GPL-2.0 OR MIT
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/**************************************************************************
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*
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* Copyright 2009-2015 VMware, Inc., Palo Alto, CA., USA
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sub license, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial portions
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* of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
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* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
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* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
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* USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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**************************************************************************/
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#include <drm/ttm/ttm_placement.h>
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#include "vmwgfx_resource_priv.h"
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#include "vmwgfx_binding.h"
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#include "vmwgfx_drv.h"
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#define VMW_RES_EVICT_ERR_COUNT 10
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/**
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* vmw_resource_mob_attach - Mark a resource as attached to its backing mob
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* @res: The resource
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*/
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void vmw_resource_mob_attach(struct vmw_resource *res)
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{
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struct vmw_buffer_object *backup = res->backup;
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struct rb_node **new = &backup->res_tree.rb_node, *parent = NULL;
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dma_resv_assert_held(res->backup->base.base.resv);
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res->used_prio = (res->res_dirty) ? res->func->dirty_prio :
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res->func->prio;
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while (*new) {
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struct vmw_resource *this =
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container_of(*new, struct vmw_resource, mob_node);
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parent = *new;
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new = (res->backup_offset < this->backup_offset) ?
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&((*new)->rb_left) : &((*new)->rb_right);
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}
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rb_link_node(&res->mob_node, parent, new);
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rb_insert_color(&res->mob_node, &backup->res_tree);
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vmw_bo_prio_add(backup, res->used_prio);
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}
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/**
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* vmw_resource_mob_detach - Mark a resource as detached from its backing mob
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* @res: The resource
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*/
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void vmw_resource_mob_detach(struct vmw_resource *res)
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{
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struct vmw_buffer_object *backup = res->backup;
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dma_resv_assert_held(backup->base.base.resv);
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if (vmw_resource_mob_attached(res)) {
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rb_erase(&res->mob_node, &backup->res_tree);
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RB_CLEAR_NODE(&res->mob_node);
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vmw_bo_prio_del(backup, res->used_prio);
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}
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}
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struct vmw_resource *vmw_resource_reference(struct vmw_resource *res)
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{
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kref_get(&res->kref);
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return res;
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}
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struct vmw_resource *
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vmw_resource_reference_unless_doomed(struct vmw_resource *res)
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{
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return kref_get_unless_zero(&res->kref) ? res : NULL;
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}
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/**
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* vmw_resource_release_id - release a resource id to the id manager.
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*
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* @res: Pointer to the resource.
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*
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* Release the resource id to the resource id manager and set it to -1
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*/
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void vmw_resource_release_id(struct vmw_resource *res)
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{
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struct vmw_private *dev_priv = res->dev_priv;
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struct idr *idr = &dev_priv->res_idr[res->func->res_type];
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spin_lock(&dev_priv->resource_lock);
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if (res->id != -1)
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idr_remove(idr, res->id);
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res->id = -1;
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spin_unlock(&dev_priv->resource_lock);
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}
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static void vmw_resource_release(struct kref *kref)
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{
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struct vmw_resource *res =
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container_of(kref, struct vmw_resource, kref);
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struct vmw_private *dev_priv = res->dev_priv;
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int id;
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struct idr *idr = &dev_priv->res_idr[res->func->res_type];
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spin_lock(&dev_priv->resource_lock);
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list_del_init(&res->lru_head);
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spin_unlock(&dev_priv->resource_lock);
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if (res->backup) {
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struct ttm_buffer_object *bo = &res->backup->base;
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ttm_bo_reserve(bo, false, false, NULL);
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if (vmw_resource_mob_attached(res) &&
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res->func->unbind != NULL) {
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struct ttm_validate_buffer val_buf;
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val_buf.bo = bo;
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val_buf.num_shared = 0;
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res->func->unbind(res, false, &val_buf);
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}
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res->backup_dirty = false;
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vmw_resource_mob_detach(res);
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if (res->dirty)
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res->func->dirty_free(res);
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if (res->coherent)
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vmw_bo_dirty_release(res->backup);
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ttm_bo_unreserve(bo);
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vmw_bo_unreference(&res->backup);
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}
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if (likely(res->hw_destroy != NULL)) {
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mutex_lock(&dev_priv->binding_mutex);
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vmw_binding_res_list_kill(&res->binding_head);
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mutex_unlock(&dev_priv->binding_mutex);
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res->hw_destroy(res);
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}
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id = res->id;
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if (res->res_free != NULL)
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res->res_free(res);
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else
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kfree(res);
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spin_lock(&dev_priv->resource_lock);
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if (id != -1)
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idr_remove(idr, id);
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spin_unlock(&dev_priv->resource_lock);
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}
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void vmw_resource_unreference(struct vmw_resource **p_res)
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{
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struct vmw_resource *res = *p_res;
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*p_res = NULL;
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kref_put(&res->kref, vmw_resource_release);
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}
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/**
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* vmw_resource_alloc_id - release a resource id to the id manager.
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*
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* @res: Pointer to the resource.
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*
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* Allocate the lowest free resource from the resource manager, and set
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* @res->id to that id. Returns 0 on success and -ENOMEM on failure.
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*/
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int vmw_resource_alloc_id(struct vmw_resource *res)
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{
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struct vmw_private *dev_priv = res->dev_priv;
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int ret;
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struct idr *idr = &dev_priv->res_idr[res->func->res_type];
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BUG_ON(res->id != -1);
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idr_preload(GFP_KERNEL);
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spin_lock(&dev_priv->resource_lock);
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ret = idr_alloc(idr, res, 1, 0, GFP_NOWAIT);
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if (ret >= 0)
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res->id = ret;
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spin_unlock(&dev_priv->resource_lock);
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idr_preload_end();
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return ret < 0 ? ret : 0;
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}
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/**
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* vmw_resource_init - initialize a struct vmw_resource
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*
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* @dev_priv: Pointer to a device private struct.
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* @res: The struct vmw_resource to initialize.
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* @obj_type: Resource object type.
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* @delay_id: Boolean whether to defer device id allocation until
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* the first validation.
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* @res_free: Resource destructor.
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* @func: Resource function table.
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*/
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int vmw_resource_init(struct vmw_private *dev_priv, struct vmw_resource *res,
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bool delay_id,
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void (*res_free) (struct vmw_resource *res),
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const struct vmw_res_func *func)
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{
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kref_init(&res->kref);
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res->hw_destroy = NULL;
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res->res_free = res_free;
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res->dev_priv = dev_priv;
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res->func = func;
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RB_CLEAR_NODE(&res->mob_node);
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INIT_LIST_HEAD(&res->lru_head);
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INIT_LIST_HEAD(&res->binding_head);
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res->id = -1;
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res->backup = NULL;
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res->backup_offset = 0;
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res->backup_dirty = false;
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res->res_dirty = false;
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res->coherent = false;
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res->used_prio = 3;
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res->dirty = NULL;
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if (delay_id)
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return 0;
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else
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return vmw_resource_alloc_id(res);
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}
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/**
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* vmw_user_resource_lookup_handle - lookup a struct resource from a
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* TTM user-space handle and perform basic type checks
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*
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* @dev_priv: Pointer to a device private struct
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* @tfile: Pointer to a struct ttm_object_file identifying the caller
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* @handle: The TTM user-space handle
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* @converter: Pointer to an object describing the resource type
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* @p_res: On successful return the location pointed to will contain
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* a pointer to a refcounted struct vmw_resource.
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*
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* If the handle can't be found or is associated with an incorrect resource
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* type, -EINVAL will be returned.
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*/
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int vmw_user_resource_lookup_handle(struct vmw_private *dev_priv,
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struct ttm_object_file *tfile,
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uint32_t handle,
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const struct vmw_user_resource_conv
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*converter,
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struct vmw_resource **p_res)
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{
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struct ttm_base_object *base;
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struct vmw_resource *res;
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int ret = -EINVAL;
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base = ttm_base_object_lookup(tfile, handle);
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if (unlikely(base == NULL))
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return -EINVAL;
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if (unlikely(ttm_base_object_type(base) != converter->object_type))
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goto out_bad_resource;
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res = converter->base_obj_to_res(base);
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kref_get(&res->kref);
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*p_res = res;
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ret = 0;
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out_bad_resource:
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ttm_base_object_unref(&base);
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return ret;
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}
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/**
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* vmw_user_resource_lookup_handle - lookup a struct resource from a
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* TTM user-space handle and perform basic type checks
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*
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* @dev_priv: Pointer to a device private struct
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* @tfile: Pointer to a struct ttm_object_file identifying the caller
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* @handle: The TTM user-space handle
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* @converter: Pointer to an object describing the resource type
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* @p_res: On successful return the location pointed to will contain
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* a pointer to a refcounted struct vmw_resource.
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*
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* If the handle can't be found or is associated with an incorrect resource
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* type, -EINVAL will be returned.
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*/
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struct vmw_resource *
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vmw_user_resource_noref_lookup_handle(struct vmw_private *dev_priv,
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struct ttm_object_file *tfile,
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uint32_t handle,
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const struct vmw_user_resource_conv
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*converter)
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{
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struct ttm_base_object *base;
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base = ttm_base_object_noref_lookup(tfile, handle);
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if (!base)
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return ERR_PTR(-ESRCH);
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if (unlikely(ttm_base_object_type(base) != converter->object_type)) {
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ttm_base_object_noref_release();
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return ERR_PTR(-EINVAL);
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}
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return converter->base_obj_to_res(base);
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}
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/**
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* Helper function that looks either a surface or bo.
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*
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* The pointer this pointed at by out_surf and out_buf needs to be null.
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*/
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int vmw_user_lookup_handle(struct vmw_private *dev_priv,
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struct ttm_object_file *tfile,
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uint32_t handle,
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struct vmw_surface **out_surf,
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struct vmw_buffer_object **out_buf)
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{
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struct vmw_resource *res;
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int ret;
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BUG_ON(*out_surf || *out_buf);
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ret = vmw_user_resource_lookup_handle(dev_priv, tfile, handle,
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user_surface_converter,
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&res);
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if (!ret) {
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*out_surf = vmw_res_to_srf(res);
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return 0;
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}
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*out_surf = NULL;
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ret = vmw_user_bo_lookup(tfile, handle, out_buf, NULL);
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return ret;
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}
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/**
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* vmw_resource_buf_alloc - Allocate a backup buffer for a resource.
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*
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* @res: The resource for which to allocate a backup buffer.
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* @interruptible: Whether any sleeps during allocation should be
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* performed while interruptible.
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*/
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static int vmw_resource_buf_alloc(struct vmw_resource *res,
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bool interruptible)
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{
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unsigned long size =
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(res->backup_size + PAGE_SIZE - 1) & PAGE_MASK;
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struct vmw_buffer_object *backup;
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int ret;
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if (likely(res->backup)) {
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BUG_ON(res->backup->base.num_pages * PAGE_SIZE < size);
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return 0;
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}
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backup = kzalloc(sizeof(*backup), GFP_KERNEL);
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if (unlikely(!backup))
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return -ENOMEM;
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ret = vmw_bo_init(res->dev_priv, backup, res->backup_size,
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res->func->backup_placement,
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interruptible,
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&vmw_bo_bo_free);
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if (unlikely(ret != 0))
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goto out_no_bo;
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res->backup = backup;
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out_no_bo:
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return ret;
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}
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/**
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* vmw_resource_do_validate - Make a resource up-to-date and visible
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* to the device.
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*
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* @res: The resource to make visible to the device.
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* @val_buf: Information about a buffer possibly
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* containing backup data if a bind operation is needed.
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*
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* On hardware resource shortage, this function returns -EBUSY and
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* should be retried once resources have been freed up.
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*/
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static int vmw_resource_do_validate(struct vmw_resource *res,
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struct ttm_validate_buffer *val_buf,
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bool dirtying)
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{
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int ret = 0;
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const struct vmw_res_func *func = res->func;
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if (unlikely(res->id == -1)) {
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ret = func->create(res);
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if (unlikely(ret != 0))
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return ret;
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}
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if (func->bind &&
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((func->needs_backup && !vmw_resource_mob_attached(res) &&
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val_buf->bo != NULL) ||
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(!func->needs_backup && val_buf->bo != NULL))) {
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ret = func->bind(res, val_buf);
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if (unlikely(ret != 0))
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goto out_bind_failed;
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if (func->needs_backup)
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vmw_resource_mob_attach(res);
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}
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/*
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* Handle the case where the backup mob is marked coherent but
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* the resource isn't.
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*/
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if (func->dirty_alloc && vmw_resource_mob_attached(res) &&
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!res->coherent) {
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if (res->backup->dirty && !res->dirty) {
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ret = func->dirty_alloc(res);
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if (ret)
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return ret;
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} else if (!res->backup->dirty && res->dirty) {
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func->dirty_free(res);
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}
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}
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/*
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* Transfer the dirty regions to the resource and update
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* the resource.
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*/
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if (res->dirty) {
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if (dirtying && !res->res_dirty) {
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pgoff_t start = res->backup_offset >> PAGE_SHIFT;
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pgoff_t end = __KERNEL_DIV_ROUND_UP
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(res->backup_offset + res->backup_size,
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PAGE_SIZE);
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vmw_bo_dirty_unmap(res->backup, start, end);
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}
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vmw_bo_dirty_transfer_to_res(res);
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return func->dirty_sync(res);
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}
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return 0;
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out_bind_failed:
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func->destroy(res);
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return ret;
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}
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/**
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* vmw_resource_unreserve - Unreserve a resource previously reserved for
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* command submission.
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*
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* @res: Pointer to the struct vmw_resource to unreserve.
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* @dirty_set: Change dirty status of the resource.
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* @dirty: When changing dirty status indicates the new status.
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* @switch_backup: Backup buffer has been switched.
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* @new_backup: Pointer to new backup buffer if command submission
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* switched. May be NULL.
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* @new_backup_offset: New backup offset if @switch_backup is true.
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*
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* Currently unreserving a resource means putting it back on the device's
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* resource lru list, so that it can be evicted if necessary.
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*/
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void vmw_resource_unreserve(struct vmw_resource *res,
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bool dirty_set,
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bool dirty,
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bool switch_backup,
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struct vmw_buffer_object *new_backup,
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unsigned long new_backup_offset)
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{
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struct vmw_private *dev_priv = res->dev_priv;
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if (!list_empty(&res->lru_head))
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return;
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if (switch_backup && new_backup != res->backup) {
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if (res->backup) {
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vmw_resource_mob_detach(res);
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if (res->coherent)
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vmw_bo_dirty_release(res->backup);
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vmw_bo_unreference(&res->backup);
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}
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if (new_backup) {
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res->backup = vmw_bo_reference(new_backup);
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/*
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* 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_FIFO_RESERVE_DX(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_fifo_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_mem_reg *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 (mem == NULL || !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->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;
|
|
}
|