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![Thierry Reding](/assets/img/avatar_default.png)
The final parameter to ttm_bo_reserve() is a pointer, therefore callers should use NULL instead of 0. Fixes a bunch of sparse warnings of this type: warning: Using plain integer as NULL pointer Signed-off-by: Thierry Reding <treding@nvidia.com> Reviewed-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
1577 lines
42 KiB
C
1577 lines
42 KiB
C
/**************************************************************************
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*
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* Copyright © 2009 VMware, Inc., Palo Alto, CA., USA
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* All Rights Reserved.
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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 "vmwgfx_drv.h"
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#include <drm/vmwgfx_drm.h>
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#include <drm/ttm/ttm_object.h>
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#include <drm/ttm/ttm_placement.h>
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#include <drm/drmP.h>
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#include "vmwgfx_resource_priv.h"
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#define VMW_RES_EVICT_ERR_COUNT 10
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struct vmw_user_dma_buffer {
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struct ttm_prime_object prime;
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struct vmw_dma_buffer dma;
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};
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struct vmw_bo_user_rep {
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uint32_t handle;
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uint64_t map_handle;
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};
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struct vmw_stream {
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struct vmw_resource res;
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uint32_t stream_id;
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};
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struct vmw_user_stream {
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struct ttm_base_object base;
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struct vmw_stream stream;
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};
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static uint64_t vmw_user_stream_size;
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static const struct vmw_res_func vmw_stream_func = {
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.res_type = vmw_res_stream,
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.needs_backup = false,
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.may_evict = false,
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.type_name = "video streams",
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.backup_placement = NULL,
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.create = NULL,
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.destroy = NULL,
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.bind = NULL,
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.unbind = NULL
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};
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static inline struct vmw_dma_buffer *
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vmw_dma_buffer(struct ttm_buffer_object *bo)
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{
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return container_of(bo, struct vmw_dma_buffer, base);
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}
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static inline struct vmw_user_dma_buffer *
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vmw_user_dma_buffer(struct ttm_buffer_object *bo)
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{
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struct vmw_dma_buffer *vmw_bo = vmw_dma_buffer(bo);
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return container_of(vmw_bo, struct vmw_user_dma_buffer, dma);
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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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write_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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write_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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res->avail = false;
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list_del_init(&res->lru_head);
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write_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, false, NULL);
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if (!list_empty(&res->mob_head) &&
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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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res->func->unbind(res, false, &val_buf);
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}
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res->backup_dirty = false;
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list_del_init(&res->mob_head);
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ttm_bo_unreserve(bo);
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vmw_dmabuf_unreference(&res->backup);
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}
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if (likely(res->hw_destroy != NULL)) {
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res->hw_destroy(res);
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mutex_lock(&dev_priv->binding_mutex);
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vmw_context_binding_res_list_kill(&res->binding_head);
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mutex_unlock(&dev_priv->binding_mutex);
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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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write_lock(&dev_priv->resource_lock);
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if (id != -1)
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idr_remove(idr, id);
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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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struct vmw_private *dev_priv = res->dev_priv;
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*p_res = NULL;
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write_lock(&dev_priv->resource_lock);
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kref_put(&res->kref, vmw_resource_release);
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write_unlock(&dev_priv->resource_lock);
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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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write_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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write_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->avail = false;
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res->dev_priv = dev_priv;
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res->func = func;
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INIT_LIST_HEAD(&res->lru_head);
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INIT_LIST_HEAD(&res->mob_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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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_resource_activate
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*
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* @res: Pointer to the newly created resource
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* @hw_destroy: Destroy function. NULL if none.
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*
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* Activate a resource after the hardware has been made aware of it.
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* Set tye destroy function to @destroy. Typically this frees the
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* resource and destroys the hardware resources associated with it.
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* Activate basically means that the function vmw_resource_lookup will
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* find it.
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*/
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void vmw_resource_activate(struct vmw_resource *res,
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void (*hw_destroy) (struct vmw_resource *))
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{
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struct vmw_private *dev_priv = res->dev_priv;
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write_lock(&dev_priv->resource_lock);
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res->avail = true;
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res->hw_destroy = hw_destroy;
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write_unlock(&dev_priv->resource_lock);
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}
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struct vmw_resource *vmw_resource_lookup(struct vmw_private *dev_priv,
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struct idr *idr, int id)
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{
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struct vmw_resource *res;
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read_lock(&dev_priv->resource_lock);
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res = idr_find(idr, id);
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if (res && res->avail)
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kref_get(&res->kref);
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else
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res = NULL;
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read_unlock(&dev_priv->resource_lock);
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if (unlikely(res == NULL))
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return NULL;
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return 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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read_lock(&dev_priv->resource_lock);
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if (!res->avail || res->res_free != converter->res_free) {
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read_unlock(&dev_priv->resource_lock);
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goto out_bad_resource;
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}
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kref_get(&res->kref);
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read_unlock(&dev_priv->resource_lock);
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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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* Helper function that looks either a surface or dmabuf.
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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_dma_buffer **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_dmabuf_lookup(tfile, handle, out_buf);
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return ret;
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}
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/**
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* Buffer management.
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*/
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/**
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* vmw_dmabuf_acc_size - Calculate the pinned memory usage of buffers
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*
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* @dev_priv: Pointer to a struct vmw_private identifying the device.
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* @size: The requested buffer size.
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* @user: Whether this is an ordinary dma buffer or a user dma buffer.
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*/
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static size_t vmw_dmabuf_acc_size(struct vmw_private *dev_priv, size_t size,
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bool user)
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{
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static size_t struct_size, user_struct_size;
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size_t num_pages = PAGE_ALIGN(size) >> PAGE_SHIFT;
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size_t page_array_size = ttm_round_pot(num_pages * sizeof(void *));
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if (unlikely(struct_size == 0)) {
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size_t backend_size = ttm_round_pot(vmw_tt_size);
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struct_size = backend_size +
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ttm_round_pot(sizeof(struct vmw_dma_buffer));
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user_struct_size = backend_size +
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ttm_round_pot(sizeof(struct vmw_user_dma_buffer));
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}
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if (dev_priv->map_mode == vmw_dma_alloc_coherent)
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page_array_size +=
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ttm_round_pot(num_pages * sizeof(dma_addr_t));
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return ((user) ? user_struct_size : struct_size) +
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page_array_size;
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}
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void vmw_dmabuf_bo_free(struct ttm_buffer_object *bo)
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{
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struct vmw_dma_buffer *vmw_bo = vmw_dma_buffer(bo);
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kfree(vmw_bo);
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}
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static void vmw_user_dmabuf_destroy(struct ttm_buffer_object *bo)
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{
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struct vmw_user_dma_buffer *vmw_user_bo = vmw_user_dma_buffer(bo);
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ttm_prime_object_kfree(vmw_user_bo, prime);
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}
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int vmw_dmabuf_init(struct vmw_private *dev_priv,
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struct vmw_dma_buffer *vmw_bo,
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size_t size, struct ttm_placement *placement,
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bool interruptible,
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void (*bo_free) (struct ttm_buffer_object *bo))
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{
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struct ttm_bo_device *bdev = &dev_priv->bdev;
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size_t acc_size;
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int ret;
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bool user = (bo_free == &vmw_user_dmabuf_destroy);
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BUG_ON(!bo_free && (!user && (bo_free != vmw_dmabuf_bo_free)));
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acc_size = vmw_dmabuf_acc_size(dev_priv, size, user);
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memset(vmw_bo, 0, sizeof(*vmw_bo));
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INIT_LIST_HEAD(&vmw_bo->res_list);
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ret = ttm_bo_init(bdev, &vmw_bo->base, size,
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ttm_bo_type_device, placement,
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0, interruptible,
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NULL, acc_size, NULL, bo_free);
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return ret;
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}
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static void vmw_user_dmabuf_release(struct ttm_base_object **p_base)
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{
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struct vmw_user_dma_buffer *vmw_user_bo;
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struct ttm_base_object *base = *p_base;
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struct ttm_buffer_object *bo;
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*p_base = NULL;
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if (unlikely(base == NULL))
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return;
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vmw_user_bo = container_of(base, struct vmw_user_dma_buffer,
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prime.base);
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bo = &vmw_user_bo->dma.base;
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ttm_bo_unref(&bo);
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}
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static void vmw_user_dmabuf_ref_obj_release(struct ttm_base_object *base,
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enum ttm_ref_type ref_type)
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{
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struct vmw_user_dma_buffer *user_bo;
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user_bo = container_of(base, struct vmw_user_dma_buffer, prime.base);
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switch (ref_type) {
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case TTM_REF_SYNCCPU_WRITE:
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ttm_bo_synccpu_write_release(&user_bo->dma.base);
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break;
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default:
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BUG();
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}
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}
|
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|
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/**
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* vmw_user_dmabuf_alloc - Allocate a user dma buffer
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*
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* @dev_priv: Pointer to a struct device private.
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* @tfile: Pointer to a struct ttm_object_file on which to register the user
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* object.
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* @size: Size of the dma buffer.
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* @shareable: Boolean whether the buffer is shareable with other open files.
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* @handle: Pointer to where the handle value should be assigned.
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* @p_dma_buf: Pointer to where the refcounted struct vmw_dma_buffer pointer
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* should be assigned.
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*/
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int vmw_user_dmabuf_alloc(struct vmw_private *dev_priv,
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struct ttm_object_file *tfile,
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uint32_t size,
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bool shareable,
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uint32_t *handle,
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struct vmw_dma_buffer **p_dma_buf)
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{
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struct vmw_user_dma_buffer *user_bo;
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struct ttm_buffer_object *tmp;
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int ret;
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user_bo = kzalloc(sizeof(*user_bo), GFP_KERNEL);
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if (unlikely(user_bo == NULL)) {
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DRM_ERROR("Failed to allocate a buffer.\n");
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return -ENOMEM;
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}
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ret = vmw_dmabuf_init(dev_priv, &user_bo->dma, size,
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(dev_priv->has_mob) ?
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&vmw_sys_placement :
|
|
&vmw_vram_sys_placement, true,
|
|
&vmw_user_dmabuf_destroy);
|
|
if (unlikely(ret != 0))
|
|
return ret;
|
|
|
|
tmp = ttm_bo_reference(&user_bo->dma.base);
|
|
ret = ttm_prime_object_init(tfile,
|
|
size,
|
|
&user_bo->prime,
|
|
shareable,
|
|
ttm_buffer_type,
|
|
&vmw_user_dmabuf_release,
|
|
&vmw_user_dmabuf_ref_obj_release);
|
|
if (unlikely(ret != 0)) {
|
|
ttm_bo_unref(&tmp);
|
|
goto out_no_base_object;
|
|
}
|
|
|
|
*p_dma_buf = &user_bo->dma;
|
|
*handle = user_bo->prime.base.hash.key;
|
|
|
|
out_no_base_object:
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* vmw_user_dmabuf_verify_access - verify access permissions on this
|
|
* buffer object.
|
|
*
|
|
* @bo: Pointer to the buffer object being accessed
|
|
* @tfile: Identifying the caller.
|
|
*/
|
|
int vmw_user_dmabuf_verify_access(struct ttm_buffer_object *bo,
|
|
struct ttm_object_file *tfile)
|
|
{
|
|
struct vmw_user_dma_buffer *vmw_user_bo;
|
|
|
|
if (unlikely(bo->destroy != vmw_user_dmabuf_destroy))
|
|
return -EPERM;
|
|
|
|
vmw_user_bo = vmw_user_dma_buffer(bo);
|
|
|
|
/* Check that the caller has opened the object. */
|
|
if (likely(ttm_ref_object_exists(tfile, &vmw_user_bo->prime.base)))
|
|
return 0;
|
|
|
|
DRM_ERROR("Could not grant buffer access.\n");
|
|
return -EPERM;
|
|
}
|
|
|
|
/**
|
|
* vmw_user_dmabuf_synccpu_grab - Grab a struct vmw_user_dma_buffer for cpu
|
|
* access, idling previous GPU operations on the buffer and optionally
|
|
* blocking it for further command submissions.
|
|
*
|
|
* @user_bo: Pointer to the buffer object being grabbed for CPU access
|
|
* @tfile: Identifying the caller.
|
|
* @flags: Flags indicating how the grab should be performed.
|
|
*
|
|
* A blocking grab will be automatically released when @tfile is closed.
|
|
*/
|
|
static int vmw_user_dmabuf_synccpu_grab(struct vmw_user_dma_buffer *user_bo,
|
|
struct ttm_object_file *tfile,
|
|
uint32_t flags)
|
|
{
|
|
struct ttm_buffer_object *bo = &user_bo->dma.base;
|
|
bool existed;
|
|
int ret;
|
|
|
|
if (flags & drm_vmw_synccpu_allow_cs) {
|
|
struct ttm_bo_device *bdev = bo->bdev;
|
|
|
|
spin_lock(&bdev->fence_lock);
|
|
ret = ttm_bo_wait(bo, false, true,
|
|
!!(flags & drm_vmw_synccpu_dontblock));
|
|
spin_unlock(&bdev->fence_lock);
|
|
return ret;
|
|
}
|
|
|
|
ret = ttm_bo_synccpu_write_grab
|
|
(bo, !!(flags & drm_vmw_synccpu_dontblock));
|
|
if (unlikely(ret != 0))
|
|
return ret;
|
|
|
|
ret = ttm_ref_object_add(tfile, &user_bo->prime.base,
|
|
TTM_REF_SYNCCPU_WRITE, &existed);
|
|
if (ret != 0 || existed)
|
|
ttm_bo_synccpu_write_release(&user_bo->dma.base);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* vmw_user_dmabuf_synccpu_release - Release a previous grab for CPU access,
|
|
* and unblock command submission on the buffer if blocked.
|
|
*
|
|
* @handle: Handle identifying the buffer object.
|
|
* @tfile: Identifying the caller.
|
|
* @flags: Flags indicating the type of release.
|
|
*/
|
|
static int vmw_user_dmabuf_synccpu_release(uint32_t handle,
|
|
struct ttm_object_file *tfile,
|
|
uint32_t flags)
|
|
{
|
|
if (!(flags & drm_vmw_synccpu_allow_cs))
|
|
return ttm_ref_object_base_unref(tfile, handle,
|
|
TTM_REF_SYNCCPU_WRITE);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* vmw_user_dmabuf_synccpu_release - ioctl function implementing the synccpu
|
|
* functionality.
|
|
*
|
|
* @dev: Identifies the drm device.
|
|
* @data: Pointer to the ioctl argument.
|
|
* @file_priv: Identifies the caller.
|
|
*
|
|
* This function checks the ioctl arguments for validity and calls the
|
|
* relevant synccpu functions.
|
|
*/
|
|
int vmw_user_dmabuf_synccpu_ioctl(struct drm_device *dev, void *data,
|
|
struct drm_file *file_priv)
|
|
{
|
|
struct drm_vmw_synccpu_arg *arg =
|
|
(struct drm_vmw_synccpu_arg *) data;
|
|
struct vmw_dma_buffer *dma_buf;
|
|
struct vmw_user_dma_buffer *user_bo;
|
|
struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
|
|
int ret;
|
|
|
|
if ((arg->flags & (drm_vmw_synccpu_read | drm_vmw_synccpu_write)) == 0
|
|
|| (arg->flags & ~(drm_vmw_synccpu_read | drm_vmw_synccpu_write |
|
|
drm_vmw_synccpu_dontblock |
|
|
drm_vmw_synccpu_allow_cs)) != 0) {
|
|
DRM_ERROR("Illegal synccpu flags.\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
switch (arg->op) {
|
|
case drm_vmw_synccpu_grab:
|
|
ret = vmw_user_dmabuf_lookup(tfile, arg->handle, &dma_buf);
|
|
if (unlikely(ret != 0))
|
|
return ret;
|
|
|
|
user_bo = container_of(dma_buf, struct vmw_user_dma_buffer,
|
|
dma);
|
|
ret = vmw_user_dmabuf_synccpu_grab(user_bo, tfile, arg->flags);
|
|
vmw_dmabuf_unreference(&dma_buf);
|
|
if (unlikely(ret != 0 && ret != -ERESTARTSYS &&
|
|
ret != -EBUSY)) {
|
|
DRM_ERROR("Failed synccpu grab on handle 0x%08x.\n",
|
|
(unsigned int) arg->handle);
|
|
return ret;
|
|
}
|
|
break;
|
|
case drm_vmw_synccpu_release:
|
|
ret = vmw_user_dmabuf_synccpu_release(arg->handle, tfile,
|
|
arg->flags);
|
|
if (unlikely(ret != 0)) {
|
|
DRM_ERROR("Failed synccpu release on handle 0x%08x.\n",
|
|
(unsigned int) arg->handle);
|
|
return ret;
|
|
}
|
|
break;
|
|
default:
|
|
DRM_ERROR("Invalid synccpu operation.\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int vmw_dmabuf_alloc_ioctl(struct drm_device *dev, void *data,
|
|
struct drm_file *file_priv)
|
|
{
|
|
struct vmw_private *dev_priv = vmw_priv(dev);
|
|
union drm_vmw_alloc_dmabuf_arg *arg =
|
|
(union drm_vmw_alloc_dmabuf_arg *)data;
|
|
struct drm_vmw_alloc_dmabuf_req *req = &arg->req;
|
|
struct drm_vmw_dmabuf_rep *rep = &arg->rep;
|
|
struct vmw_dma_buffer *dma_buf;
|
|
uint32_t handle;
|
|
int ret;
|
|
|
|
ret = ttm_read_lock(&dev_priv->reservation_sem, true);
|
|
if (unlikely(ret != 0))
|
|
return ret;
|
|
|
|
ret = vmw_user_dmabuf_alloc(dev_priv, vmw_fpriv(file_priv)->tfile,
|
|
req->size, false, &handle, &dma_buf);
|
|
if (unlikely(ret != 0))
|
|
goto out_no_dmabuf;
|
|
|
|
rep->handle = handle;
|
|
rep->map_handle = drm_vma_node_offset_addr(&dma_buf->base.vma_node);
|
|
rep->cur_gmr_id = handle;
|
|
rep->cur_gmr_offset = 0;
|
|
|
|
vmw_dmabuf_unreference(&dma_buf);
|
|
|
|
out_no_dmabuf:
|
|
ttm_read_unlock(&dev_priv->reservation_sem);
|
|
|
|
return ret;
|
|
}
|
|
|
|
int vmw_dmabuf_unref_ioctl(struct drm_device *dev, void *data,
|
|
struct drm_file *file_priv)
|
|
{
|
|
struct drm_vmw_unref_dmabuf_arg *arg =
|
|
(struct drm_vmw_unref_dmabuf_arg *)data;
|
|
|
|
return ttm_ref_object_base_unref(vmw_fpriv(file_priv)->tfile,
|
|
arg->handle,
|
|
TTM_REF_USAGE);
|
|
}
|
|
|
|
int vmw_user_dmabuf_lookup(struct ttm_object_file *tfile,
|
|
uint32_t handle, struct vmw_dma_buffer **out)
|
|
{
|
|
struct vmw_user_dma_buffer *vmw_user_bo;
|
|
struct ttm_base_object *base;
|
|
|
|
base = ttm_base_object_lookup(tfile, handle);
|
|
if (unlikely(base == NULL)) {
|
|
printk(KERN_ERR "Invalid buffer object handle 0x%08lx.\n",
|
|
(unsigned long)handle);
|
|
return -ESRCH;
|
|
}
|
|
|
|
if (unlikely(ttm_base_object_type(base) != ttm_buffer_type)) {
|
|
ttm_base_object_unref(&base);
|
|
printk(KERN_ERR "Invalid buffer object handle 0x%08lx.\n",
|
|
(unsigned long)handle);
|
|
return -EINVAL;
|
|
}
|
|
|
|
vmw_user_bo = container_of(base, struct vmw_user_dma_buffer,
|
|
prime.base);
|
|
(void)ttm_bo_reference(&vmw_user_bo->dma.base);
|
|
ttm_base_object_unref(&base);
|
|
*out = &vmw_user_bo->dma;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int vmw_user_dmabuf_reference(struct ttm_object_file *tfile,
|
|
struct vmw_dma_buffer *dma_buf,
|
|
uint32_t *handle)
|
|
{
|
|
struct vmw_user_dma_buffer *user_bo;
|
|
|
|
if (dma_buf->base.destroy != vmw_user_dmabuf_destroy)
|
|
return -EINVAL;
|
|
|
|
user_bo = container_of(dma_buf, struct vmw_user_dma_buffer, dma);
|
|
|
|
*handle = user_bo->prime.base.hash.key;
|
|
return ttm_ref_object_add(tfile, &user_bo->prime.base,
|
|
TTM_REF_USAGE, NULL);
|
|
}
|
|
|
|
/*
|
|
* Stream management
|
|
*/
|
|
|
|
static void vmw_stream_destroy(struct vmw_resource *res)
|
|
{
|
|
struct vmw_private *dev_priv = res->dev_priv;
|
|
struct vmw_stream *stream;
|
|
int ret;
|
|
|
|
DRM_INFO("%s: unref\n", __func__);
|
|
stream = container_of(res, struct vmw_stream, res);
|
|
|
|
ret = vmw_overlay_unref(dev_priv, stream->stream_id);
|
|
WARN_ON(ret != 0);
|
|
}
|
|
|
|
static int vmw_stream_init(struct vmw_private *dev_priv,
|
|
struct vmw_stream *stream,
|
|
void (*res_free) (struct vmw_resource *res))
|
|
{
|
|
struct vmw_resource *res = &stream->res;
|
|
int ret;
|
|
|
|
ret = vmw_resource_init(dev_priv, res, false, res_free,
|
|
&vmw_stream_func);
|
|
|
|
if (unlikely(ret != 0)) {
|
|
if (res_free == NULL)
|
|
kfree(stream);
|
|
else
|
|
res_free(&stream->res);
|
|
return ret;
|
|
}
|
|
|
|
ret = vmw_overlay_claim(dev_priv, &stream->stream_id);
|
|
if (ret) {
|
|
vmw_resource_unreference(&res);
|
|
return ret;
|
|
}
|
|
|
|
DRM_INFO("%s: claimed\n", __func__);
|
|
|
|
vmw_resource_activate(&stream->res, vmw_stream_destroy);
|
|
return 0;
|
|
}
|
|
|
|
static void vmw_user_stream_free(struct vmw_resource *res)
|
|
{
|
|
struct vmw_user_stream *stream =
|
|
container_of(res, struct vmw_user_stream, stream.res);
|
|
struct vmw_private *dev_priv = res->dev_priv;
|
|
|
|
ttm_base_object_kfree(stream, base);
|
|
ttm_mem_global_free(vmw_mem_glob(dev_priv),
|
|
vmw_user_stream_size);
|
|
}
|
|
|
|
/**
|
|
* This function is called when user space has no more references on the
|
|
* base object. It releases the base-object's reference on the resource object.
|
|
*/
|
|
|
|
static void vmw_user_stream_base_release(struct ttm_base_object **p_base)
|
|
{
|
|
struct ttm_base_object *base = *p_base;
|
|
struct vmw_user_stream *stream =
|
|
container_of(base, struct vmw_user_stream, base);
|
|
struct vmw_resource *res = &stream->stream.res;
|
|
|
|
*p_base = NULL;
|
|
vmw_resource_unreference(&res);
|
|
}
|
|
|
|
int vmw_stream_unref_ioctl(struct drm_device *dev, void *data,
|
|
struct drm_file *file_priv)
|
|
{
|
|
struct vmw_private *dev_priv = vmw_priv(dev);
|
|
struct vmw_resource *res;
|
|
struct vmw_user_stream *stream;
|
|
struct drm_vmw_stream_arg *arg = (struct drm_vmw_stream_arg *)data;
|
|
struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
|
|
struct idr *idr = &dev_priv->res_idr[vmw_res_stream];
|
|
int ret = 0;
|
|
|
|
|
|
res = vmw_resource_lookup(dev_priv, idr, arg->stream_id);
|
|
if (unlikely(res == NULL))
|
|
return -EINVAL;
|
|
|
|
if (res->res_free != &vmw_user_stream_free) {
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
stream = container_of(res, struct vmw_user_stream, stream.res);
|
|
if (stream->base.tfile != tfile) {
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
ttm_ref_object_base_unref(tfile, stream->base.hash.key, TTM_REF_USAGE);
|
|
out:
|
|
vmw_resource_unreference(&res);
|
|
return ret;
|
|
}
|
|
|
|
int vmw_stream_claim_ioctl(struct drm_device *dev, void *data,
|
|
struct drm_file *file_priv)
|
|
{
|
|
struct vmw_private *dev_priv = vmw_priv(dev);
|
|
struct vmw_user_stream *stream;
|
|
struct vmw_resource *res;
|
|
struct vmw_resource *tmp;
|
|
struct drm_vmw_stream_arg *arg = (struct drm_vmw_stream_arg *)data;
|
|
struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
|
|
int ret;
|
|
|
|
/*
|
|
* Approximate idr memory usage with 128 bytes. It will be limited
|
|
* by maximum number_of streams anyway?
|
|
*/
|
|
|
|
if (unlikely(vmw_user_stream_size == 0))
|
|
vmw_user_stream_size = ttm_round_pot(sizeof(*stream)) + 128;
|
|
|
|
ret = ttm_read_lock(&dev_priv->reservation_sem, true);
|
|
if (unlikely(ret != 0))
|
|
return ret;
|
|
|
|
ret = ttm_mem_global_alloc(vmw_mem_glob(dev_priv),
|
|
vmw_user_stream_size,
|
|
false, true);
|
|
if (unlikely(ret != 0)) {
|
|
if (ret != -ERESTARTSYS)
|
|
DRM_ERROR("Out of graphics memory for stream"
|
|
" creation.\n");
|
|
goto out_unlock;
|
|
}
|
|
|
|
|
|
stream = kmalloc(sizeof(*stream), GFP_KERNEL);
|
|
if (unlikely(stream == NULL)) {
|
|
ttm_mem_global_free(vmw_mem_glob(dev_priv),
|
|
vmw_user_stream_size);
|
|
ret = -ENOMEM;
|
|
goto out_unlock;
|
|
}
|
|
|
|
res = &stream->stream.res;
|
|
stream->base.shareable = false;
|
|
stream->base.tfile = NULL;
|
|
|
|
/*
|
|
* From here on, the destructor takes over resource freeing.
|
|
*/
|
|
|
|
ret = vmw_stream_init(dev_priv, &stream->stream, vmw_user_stream_free);
|
|
if (unlikely(ret != 0))
|
|
goto out_unlock;
|
|
|
|
tmp = vmw_resource_reference(res);
|
|
ret = ttm_base_object_init(tfile, &stream->base, false, VMW_RES_STREAM,
|
|
&vmw_user_stream_base_release, NULL);
|
|
|
|
if (unlikely(ret != 0)) {
|
|
vmw_resource_unreference(&tmp);
|
|
goto out_err;
|
|
}
|
|
|
|
arg->stream_id = res->id;
|
|
out_err:
|
|
vmw_resource_unreference(&res);
|
|
out_unlock:
|
|
ttm_read_unlock(&dev_priv->reservation_sem);
|
|
return ret;
|
|
}
|
|
|
|
int vmw_user_stream_lookup(struct vmw_private *dev_priv,
|
|
struct ttm_object_file *tfile,
|
|
uint32_t *inout_id, struct vmw_resource **out)
|
|
{
|
|
struct vmw_user_stream *stream;
|
|
struct vmw_resource *res;
|
|
int ret;
|
|
|
|
res = vmw_resource_lookup(dev_priv, &dev_priv->res_idr[vmw_res_stream],
|
|
*inout_id);
|
|
if (unlikely(res == NULL))
|
|
return -EINVAL;
|
|
|
|
if (res->res_free != &vmw_user_stream_free) {
|
|
ret = -EINVAL;
|
|
goto err_ref;
|
|
}
|
|
|
|
stream = container_of(res, struct vmw_user_stream, stream.res);
|
|
if (stream->base.tfile != tfile) {
|
|
ret = -EPERM;
|
|
goto err_ref;
|
|
}
|
|
|
|
*inout_id = stream->stream.stream_id;
|
|
*out = res;
|
|
return 0;
|
|
err_ref:
|
|
vmw_resource_unreference(&res);
|
|
return ret;
|
|
}
|
|
|
|
|
|
/**
|
|
* vmw_dumb_create - Create a dumb kms buffer
|
|
*
|
|
* @file_priv: Pointer to a struct drm_file identifying the caller.
|
|
* @dev: Pointer to the drm device.
|
|
* @args: Pointer to a struct drm_mode_create_dumb structure
|
|
*
|
|
* This is a driver callback for the core drm create_dumb functionality.
|
|
* Note that this is very similar to the vmw_dmabuf_alloc ioctl, except
|
|
* that the arguments have a different format.
|
|
*/
|
|
int vmw_dumb_create(struct drm_file *file_priv,
|
|
struct drm_device *dev,
|
|
struct drm_mode_create_dumb *args)
|
|
{
|
|
struct vmw_private *dev_priv = vmw_priv(dev);
|
|
struct vmw_dma_buffer *dma_buf;
|
|
int ret;
|
|
|
|
args->pitch = args->width * ((args->bpp + 7) / 8);
|
|
args->size = args->pitch * args->height;
|
|
|
|
ret = ttm_read_lock(&dev_priv->reservation_sem, true);
|
|
if (unlikely(ret != 0))
|
|
return ret;
|
|
|
|
ret = vmw_user_dmabuf_alloc(dev_priv, vmw_fpriv(file_priv)->tfile,
|
|
args->size, false, &args->handle,
|
|
&dma_buf);
|
|
if (unlikely(ret != 0))
|
|
goto out_no_dmabuf;
|
|
|
|
vmw_dmabuf_unreference(&dma_buf);
|
|
out_no_dmabuf:
|
|
ttm_read_unlock(&dev_priv->reservation_sem);
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* vmw_dumb_map_offset - Return the address space offset of a dumb buffer
|
|
*
|
|
* @file_priv: Pointer to a struct drm_file identifying the caller.
|
|
* @dev: Pointer to the drm device.
|
|
* @handle: Handle identifying the dumb buffer.
|
|
* @offset: The address space offset returned.
|
|
*
|
|
* This is a driver callback for the core drm dumb_map_offset functionality.
|
|
*/
|
|
int vmw_dumb_map_offset(struct drm_file *file_priv,
|
|
struct drm_device *dev, uint32_t handle,
|
|
uint64_t *offset)
|
|
{
|
|
struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
|
|
struct vmw_dma_buffer *out_buf;
|
|
int ret;
|
|
|
|
ret = vmw_user_dmabuf_lookup(tfile, handle, &out_buf);
|
|
if (ret != 0)
|
|
return -EINVAL;
|
|
|
|
*offset = drm_vma_node_offset_addr(&out_buf->base.vma_node);
|
|
vmw_dmabuf_unreference(&out_buf);
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* vmw_dumb_destroy - Destroy a dumb boffer
|
|
*
|
|
* @file_priv: Pointer to a struct drm_file identifying the caller.
|
|
* @dev: Pointer to the drm device.
|
|
* @handle: Handle identifying the dumb buffer.
|
|
*
|
|
* This is a driver callback for the core drm dumb_destroy functionality.
|
|
*/
|
|
int vmw_dumb_destroy(struct drm_file *file_priv,
|
|
struct drm_device *dev,
|
|
uint32_t handle)
|
|
{
|
|
return ttm_ref_object_base_unref(vmw_fpriv(file_priv)->tfile,
|
|
handle, TTM_REF_USAGE);
|
|
}
|
|
|
|
/**
|
|
* 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_dma_buffer *backup;
|
|
int ret;
|
|
|
|
if (likely(res->backup)) {
|
|
BUG_ON(res->backup->base.num_pages * PAGE_SIZE < size);
|
|
return 0;
|
|
}
|
|
|
|
backup = kzalloc(sizeof(*backup), GFP_KERNEL);
|
|
if (unlikely(backup == NULL))
|
|
return -ENOMEM;
|
|
|
|
ret = vmw_dmabuf_init(res->dev_priv, backup, res->backup_size,
|
|
res->func->backup_placement,
|
|
interruptible,
|
|
&vmw_dmabuf_bo_free);
|
|
if (unlikely(ret != 0))
|
|
goto out_no_dmabuf;
|
|
|
|
res->backup = backup;
|
|
|
|
out_no_dmabuf:
|
|
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)
|
|
{
|
|
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 && list_empty(&res->mob_head) &&
|
|
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)
|
|
list_add_tail(&res->mob_head, &res->backup->res_list);
|
|
}
|
|
|
|
/*
|
|
* Only do this on write operations, and move to
|
|
* vmw_resource_unreserve if it can be called after
|
|
* backup buffers have been unreserved. Otherwise
|
|
* sort out locking.
|
|
*/
|
|
res->res_dirty = true;
|
|
|
|
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.
|
|
* @new_backup: Pointer to new backup buffer if command submission
|
|
* switched.
|
|
* @new_backup_offset: New backup offset if @new_backup is !NULL.
|
|
*
|
|
* 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,
|
|
struct vmw_dma_buffer *new_backup,
|
|
unsigned long new_backup_offset)
|
|
{
|
|
struct vmw_private *dev_priv = res->dev_priv;
|
|
|
|
if (!list_empty(&res->lru_head))
|
|
return;
|
|
|
|
if (new_backup && new_backup != res->backup) {
|
|
|
|
if (res->backup) {
|
|
lockdep_assert_held(&res->backup->base.resv->lock.base);
|
|
list_del_init(&res->mob_head);
|
|
vmw_dmabuf_unreference(&res->backup);
|
|
}
|
|
|
|
res->backup = vmw_dmabuf_reference(new_backup);
|
|
lockdep_assert_held(&new_backup->base.resv->lock.base);
|
|
list_add_tail(&res->mob_head, &new_backup->res_list);
|
|
}
|
|
if (new_backup)
|
|
res->backup_offset = new_backup_offset;
|
|
|
|
if (!res->func->may_evict || res->id == -1)
|
|
return;
|
|
|
|
write_lock(&dev_priv->resource_lock);
|
|
list_add_tail(&res->lru_head,
|
|
&res->dev_priv->res_lru[res->func->res_type]);
|
|
write_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.
|
|
*
|
|
* @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 vmw_resource *res,
|
|
bool interruptible,
|
|
struct ttm_validate_buffer *val_buf)
|
|
{
|
|
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);
|
|
val_buf->bo = ttm_bo_reference(&res->backup->base);
|
|
list_add_tail(&val_buf->head, &val_list);
|
|
ret = ttm_eu_reserve_buffers(NULL, &val_list);
|
|
if (unlikely(ret != 0))
|
|
goto out_no_reserve;
|
|
|
|
if (res->func->needs_backup && list_empty(&res->mob_head))
|
|
return 0;
|
|
|
|
backup_dirty = res->backup_dirty;
|
|
ret = ttm_bo_validate(&res->backup->base,
|
|
res->func->backup_placement,
|
|
true, false);
|
|
|
|
if (unlikely(ret != 0))
|
|
goto out_no_validate;
|
|
|
|
return 0;
|
|
|
|
out_no_validate:
|
|
ttm_eu_backoff_reservation(NULL, &val_list);
|
|
out_no_reserve:
|
|
ttm_bo_unref(&val_buf->bo);
|
|
if (backup_dirty)
|
|
vmw_dmabuf_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 no_backup)
|
|
{
|
|
struct vmw_private *dev_priv = res->dev_priv;
|
|
int ret;
|
|
|
|
write_lock(&dev_priv->resource_lock);
|
|
list_del_init(&res->lru_head);
|
|
write_unlock(&dev_priv->resource_lock);
|
|
|
|
if (res->func->needs_backup && res->backup == NULL &&
|
|
!no_backup) {
|
|
ret = vmw_resource_buf_alloc(res, true);
|
|
if (unlikely(ret != 0))
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* vmw_resource_backoff_reservation - Unreserve and unreference a
|
|
* backup buffer
|
|
*.
|
|
* @val_buf: Backup buffer information.
|
|
*/
|
|
static void
|
|
vmw_resource_backoff_reservation(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(NULL, &val_list);
|
|
ttm_bo_unref(&val_buf->bo);
|
|
}
|
|
|
|
/**
|
|
* vmw_resource_do_evict - Evict a resource, and transfer its data
|
|
* to a backup buffer.
|
|
*
|
|
* @res: The resource to evict.
|
|
* @interruptible: Whether to wait interruptible.
|
|
*/
|
|
int vmw_resource_do_evict(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;
|
|
ret = vmw_resource_check_buffer(res, interruptible, &val_buf);
|
|
if (unlikely(ret != 0))
|
|
return ret;
|
|
|
|
if (unlikely(func->unbind != NULL &&
|
|
(!func->needs_backup || !list_empty(&res->mob_head)))) {
|
|
ret = func->unbind(res, res->res_dirty, &val_buf);
|
|
if (unlikely(ret != 0))
|
|
goto out_no_unbind;
|
|
list_del_init(&res->mob_head);
|
|
}
|
|
ret = func->destroy(res);
|
|
res->backup_dirty = true;
|
|
res->res_dirty = false;
|
|
out_no_unbind:
|
|
vmw_resource_backoff_reservation(&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.
|
|
*
|
|
* 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.
|
|
*/
|
|
int vmw_resource_validate(struct vmw_resource *res)
|
|
{
|
|
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 (likely(!res->func->may_evict))
|
|
return 0;
|
|
|
|
val_buf.bo = NULL;
|
|
if (res->backup)
|
|
val_buf.bo = &res->backup->base;
|
|
do {
|
|
ret = vmw_resource_do_validate(res, &val_buf);
|
|
if (likely(ret != -EBUSY))
|
|
break;
|
|
|
|
write_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;
|
|
write_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);
|
|
|
|
write_unlock(&dev_priv->resource_lock);
|
|
|
|
ret = vmw_resource_do_evict(evict_res, true);
|
|
if (unlikely(ret != 0)) {
|
|
write_lock(&dev_priv->resource_lock);
|
|
list_add_tail(&evict_res->lru_head, lru_list);
|
|
write_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) {
|
|
list_del_init(&res->mob_head);
|
|
vmw_dmabuf_unreference(&res->backup);
|
|
}
|
|
|
|
return 0;
|
|
|
|
out_no_validate:
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* vmw_fence_single_bo - Utility function to fence a single TTM buffer
|
|
* object without unreserving it.
|
|
*
|
|
* @bo: Pointer to the struct ttm_buffer_object to fence.
|
|
* @fence: Pointer to the fence. If NULL, this function will
|
|
* insert a fence into the command stream..
|
|
*
|
|
* Contrary to the ttm_eu version of this function, it takes only
|
|
* a single buffer object instead of a list, and it also doesn't
|
|
* unreserve the buffer object, which needs to be done separately.
|
|
*/
|
|
void vmw_fence_single_bo(struct ttm_buffer_object *bo,
|
|
struct vmw_fence_obj *fence)
|
|
{
|
|
struct ttm_bo_device *bdev = bo->bdev;
|
|
struct ttm_bo_driver *driver = bdev->driver;
|
|
struct vmw_fence_obj *old_fence_obj;
|
|
struct vmw_private *dev_priv =
|
|
container_of(bdev, struct vmw_private, bdev);
|
|
|
|
if (fence == NULL)
|
|
vmw_execbuf_fence_commands(NULL, dev_priv, &fence, NULL);
|
|
else
|
|
driver->sync_obj_ref(fence);
|
|
|
|
spin_lock(&bdev->fence_lock);
|
|
|
|
old_fence_obj = bo->sync_obj;
|
|
bo->sync_obj = fence;
|
|
|
|
spin_unlock(&bdev->fence_lock);
|
|
|
|
if (old_fence_obj)
|
|
vmw_fence_obj_unreference(&old_fence_obj);
|
|
}
|
|
|
|
/**
|
|
* vmw_resource_move_notify - TTM move_notify_callback
|
|
*
|
|
* @bo: The TTM buffer object about to move.
|
|
* @mem: The truct ttm_mem_reg indicating to what memory
|
|
* region the move is taking place.
|
|
*
|
|
* Evicts the Guest Backed hardware resource if the backup
|
|
* buffer is being moved out of MOB memory.
|
|
* Note that this function should not race with the resource
|
|
* validation code as long as it accesses only members of struct
|
|
* resource that remain static while bo::res is !NULL and
|
|
* while we have @bo reserved. struct resource::backup is *not* a
|
|
* static member. The resource validation code will take care
|
|
* to set @bo::res to NULL, while having @bo reserved when the
|
|
* buffer is no longer bound to the resource, so @bo:res can be
|
|
* used to determine whether there is a need to unbind and whether
|
|
* it is safe to unbind.
|
|
*/
|
|
void vmw_resource_move_notify(struct ttm_buffer_object *bo,
|
|
struct ttm_mem_reg *mem)
|
|
{
|
|
struct vmw_dma_buffer *dma_buf;
|
|
|
|
if (mem == NULL)
|
|
return;
|
|
|
|
if (bo->destroy != vmw_dmabuf_bo_free &&
|
|
bo->destroy != vmw_user_dmabuf_destroy)
|
|
return;
|
|
|
|
dma_buf = container_of(bo, struct vmw_dma_buffer, base);
|
|
|
|
if (mem->mem_type != VMW_PL_MOB) {
|
|
struct vmw_resource *res, *n;
|
|
struct ttm_bo_device *bdev = bo->bdev;
|
|
struct ttm_validate_buffer val_buf;
|
|
|
|
val_buf.bo = bo;
|
|
|
|
list_for_each_entry_safe(res, n, &dma_buf->res_list, mob_head) {
|
|
|
|
if (unlikely(res->func->unbind == NULL))
|
|
continue;
|
|
|
|
(void) res->func->unbind(res, true, &val_buf);
|
|
res->backup_dirty = true;
|
|
res->res_dirty = false;
|
|
list_del_init(&res->mob_head);
|
|
}
|
|
|
|
spin_lock(&bdev->fence_lock);
|
|
(void) ttm_bo_wait(bo, false, false, false);
|
|
spin_unlock(&bdev->fence_lock);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* 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;
|
|
|
|
do {
|
|
write_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);
|
|
write_unlock(&dev_priv->resource_lock);
|
|
|
|
ret = vmw_resource_do_evict(evict_res, false);
|
|
if (unlikely(ret != 0)) {
|
|
write_lock(&dev_priv->resource_lock);
|
|
list_add_tail(&evict_res->lru_head, lru_list);
|
|
write_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:
|
|
write_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);
|
|
}
|