350 lines
9.9 KiB
C
350 lines
9.9 KiB
C
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// SPDX-License-Identifier: GPL-2.0 OR MIT
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/**************************************************************************
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*
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* Copyright 2014-2015 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 "vmwgfx_drv.h"
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#include "vmwgfx_resource_priv.h"
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#define VMW_CMDBUF_RES_MAN_HT_ORDER 12
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/**
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* struct vmw_cmdbuf_res - Command buffer managed resource entry.
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*
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* @res: Refcounted pointer to a struct vmw_resource.
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* @hash: Hash entry for the manager hash table.
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* @head: List head used either by the staging list or the manager list
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* of commited resources.
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* @state: Staging state of this resource entry.
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* @man: Pointer to a resource manager for this entry.
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*/
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struct vmw_cmdbuf_res {
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struct vmw_resource *res;
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struct drm_hash_item hash;
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struct list_head head;
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enum vmw_cmdbuf_res_state state;
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struct vmw_cmdbuf_res_manager *man;
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};
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/**
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* struct vmw_cmdbuf_res_manager - Command buffer resource manager.
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*
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* @resources: Hash table containing staged and commited command buffer
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* resources
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* @list: List of commited command buffer resources.
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* @dev_priv: Pointer to a device private structure.
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*
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* @resources and @list are protected by the cmdbuf mutex for now.
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*/
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struct vmw_cmdbuf_res_manager {
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struct drm_open_hash resources;
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struct list_head list;
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struct vmw_private *dev_priv;
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};
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/**
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* vmw_cmdbuf_res_lookup - Look up a command buffer resource
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*
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* @man: Pointer to the command buffer resource manager
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* @resource_type: The resource type, that combined with the user key
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* identifies the resource.
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* @user_key: The user key.
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*
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* Returns a valid refcounted struct vmw_resource pointer on success,
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* an error pointer on failure.
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*/
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struct vmw_resource *
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vmw_cmdbuf_res_lookup(struct vmw_cmdbuf_res_manager *man,
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enum vmw_cmdbuf_res_type res_type,
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u32 user_key)
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{
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struct drm_hash_item *hash;
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int ret;
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unsigned long key = user_key | (res_type << 24);
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ret = drm_ht_find_item(&man->resources, key, &hash);
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if (unlikely(ret != 0))
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return ERR_PTR(ret);
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return vmw_resource_reference
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(drm_hash_entry(hash, struct vmw_cmdbuf_res, hash)->res);
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}
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/**
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* vmw_cmdbuf_res_free - Free a command buffer resource.
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*
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* @man: Pointer to the command buffer resource manager
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* @entry: Pointer to a struct vmw_cmdbuf_res.
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*
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* Frees a struct vmw_cmdbuf_res entry and drops its reference to the
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* struct vmw_resource.
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*/
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static void vmw_cmdbuf_res_free(struct vmw_cmdbuf_res_manager *man,
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struct vmw_cmdbuf_res *entry)
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{
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list_del(&entry->head);
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WARN_ON(drm_ht_remove_item(&man->resources, &entry->hash));
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vmw_resource_unreference(&entry->res);
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kfree(entry);
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}
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/**
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* vmw_cmdbuf_res_commit - Commit a list of command buffer resource actions
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*
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* @list: Caller's list of command buffer resource actions.
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*
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* This function commits a list of command buffer resource
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* additions or removals.
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* It is typically called when the execbuf ioctl call triggering these
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* actions has commited the fifo contents to the device.
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*/
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void vmw_cmdbuf_res_commit(struct list_head *list)
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{
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struct vmw_cmdbuf_res *entry, *next;
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list_for_each_entry_safe(entry, next, list, head) {
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list_del(&entry->head);
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if (entry->res->func->commit_notify)
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entry->res->func->commit_notify(entry->res,
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entry->state);
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switch (entry->state) {
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case VMW_CMDBUF_RES_ADD:
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entry->state = VMW_CMDBUF_RES_COMMITTED;
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list_add_tail(&entry->head, &entry->man->list);
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break;
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case VMW_CMDBUF_RES_DEL:
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vmw_resource_unreference(&entry->res);
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kfree(entry);
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break;
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default:
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BUG();
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break;
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}
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}
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}
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/**
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* vmw_cmdbuf_res_revert - Revert a list of command buffer resource actions
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*
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* @man: Pointer to the command buffer resource manager
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* @list: Caller's list of command buffer resource action
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*
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* This function reverts a list of command buffer resource
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* additions or removals.
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* It is typically called when the execbuf ioctl call triggering these
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* actions failed for some reason, and the command stream was never
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* submitted.
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*/
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void vmw_cmdbuf_res_revert(struct list_head *list)
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{
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struct vmw_cmdbuf_res *entry, *next;
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int ret;
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list_for_each_entry_safe(entry, next, list, head) {
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switch (entry->state) {
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case VMW_CMDBUF_RES_ADD:
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vmw_cmdbuf_res_free(entry->man, entry);
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break;
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case VMW_CMDBUF_RES_DEL:
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ret = drm_ht_insert_item(&entry->man->resources,
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&entry->hash);
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list_del(&entry->head);
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list_add_tail(&entry->head, &entry->man->list);
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entry->state = VMW_CMDBUF_RES_COMMITTED;
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break;
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default:
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BUG();
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break;
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}
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}
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}
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/**
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* vmw_cmdbuf_res_add - Stage a command buffer managed resource for addition.
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*
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* @man: Pointer to the command buffer resource manager.
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* @res_type: The resource type.
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* @user_key: The user-space id of the resource.
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* @res: Valid (refcount != 0) pointer to a struct vmw_resource.
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* @list: The staging list.
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*
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* This function allocates a struct vmw_cmdbuf_res entry and adds the
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* resource to the hash table of the manager identified by @man. The
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* entry is then put on the staging list identified by @list.
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*/
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int vmw_cmdbuf_res_add(struct vmw_cmdbuf_res_manager *man,
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enum vmw_cmdbuf_res_type res_type,
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u32 user_key,
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struct vmw_resource *res,
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struct list_head *list)
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{
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struct vmw_cmdbuf_res *cres;
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int ret;
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cres = kzalloc(sizeof(*cres), GFP_KERNEL);
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if (unlikely(!cres))
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return -ENOMEM;
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cres->hash.key = user_key | (res_type << 24);
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ret = drm_ht_insert_item(&man->resources, &cres->hash);
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if (unlikely(ret != 0)) {
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kfree(cres);
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goto out_invalid_key;
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}
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cres->state = VMW_CMDBUF_RES_ADD;
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cres->res = vmw_resource_reference(res);
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cres->man = man;
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list_add_tail(&cres->head, list);
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out_invalid_key:
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return ret;
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}
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/**
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* vmw_cmdbuf_res_remove - Stage a command buffer managed resource for removal.
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*
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* @man: Pointer to the command buffer resource manager.
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* @res_type: The resource type.
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* @user_key: The user-space id of the resource.
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* @list: The staging list.
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* @res_p: If the resource is in an already committed state, points to the
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* struct vmw_resource on successful return. The pointer will be
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* non ref-counted.
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*
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* This function looks up the struct vmw_cmdbuf_res entry from the manager
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* hash table and, if it exists, removes it. Depending on its current staging
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* state it then either removes the entry from the staging list or adds it
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* to it with a staging state of removal.
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*/
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int vmw_cmdbuf_res_remove(struct vmw_cmdbuf_res_manager *man,
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enum vmw_cmdbuf_res_type res_type,
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u32 user_key,
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struct list_head *list,
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struct vmw_resource **res_p)
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{
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struct vmw_cmdbuf_res *entry;
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struct drm_hash_item *hash;
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int ret;
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ret = drm_ht_find_item(&man->resources, user_key | (res_type << 24),
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&hash);
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if (likely(ret != 0))
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return -EINVAL;
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entry = drm_hash_entry(hash, struct vmw_cmdbuf_res, hash);
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switch (entry->state) {
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case VMW_CMDBUF_RES_ADD:
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vmw_cmdbuf_res_free(man, entry);
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*res_p = NULL;
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break;
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case VMW_CMDBUF_RES_COMMITTED:
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(void) drm_ht_remove_item(&man->resources, &entry->hash);
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list_del(&entry->head);
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entry->state = VMW_CMDBUF_RES_DEL;
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list_add_tail(&entry->head, list);
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*res_p = entry->res;
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break;
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default:
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BUG();
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break;
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}
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return 0;
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}
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/**
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* vmw_cmdbuf_res_man_create - Allocate a command buffer managed resource
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* manager.
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*
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* @dev_priv: Pointer to a struct vmw_private
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*
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* Allocates and initializes a command buffer managed resource manager. Returns
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* an error pointer on failure.
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*/
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struct vmw_cmdbuf_res_manager *
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vmw_cmdbuf_res_man_create(struct vmw_private *dev_priv)
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{
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struct vmw_cmdbuf_res_manager *man;
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int ret;
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man = kzalloc(sizeof(*man), GFP_KERNEL);
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if (!man)
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return ERR_PTR(-ENOMEM);
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man->dev_priv = dev_priv;
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INIT_LIST_HEAD(&man->list);
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ret = drm_ht_create(&man->resources, VMW_CMDBUF_RES_MAN_HT_ORDER);
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if (ret == 0)
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return man;
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kfree(man);
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return ERR_PTR(ret);
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}
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/**
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* vmw_cmdbuf_res_man_destroy - Destroy a command buffer managed resource
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* manager.
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*
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* @man: Pointer to the manager to destroy.
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*
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* This function destroys a command buffer managed resource manager and
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* unreferences / frees all command buffer managed resources and -entries
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* associated with it.
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*/
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void vmw_cmdbuf_res_man_destroy(struct vmw_cmdbuf_res_manager *man)
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{
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struct vmw_cmdbuf_res *entry, *next;
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list_for_each_entry_safe(entry, next, &man->list, head)
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vmw_cmdbuf_res_free(man, entry);
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drm_ht_remove(&man->resources);
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kfree(man);
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}
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/**
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*
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* vmw_cmdbuf_res_man_size - Return the size of a command buffer managed
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* resource manager
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*
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* Returns the approximate allocation size of a command buffer managed
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* resource manager.
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*/
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size_t vmw_cmdbuf_res_man_size(void)
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{
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static size_t res_man_size;
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if (unlikely(res_man_size == 0))
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res_man_size =
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ttm_round_pot(sizeof(struct vmw_cmdbuf_res_manager)) +
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ttm_round_pot(sizeof(struct hlist_head) <<
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VMW_CMDBUF_RES_MAN_HT_ORDER);
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return res_man_size;
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}
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