c7eae62666
Instead of generating user-space object handles based on a, possibly processed, hash of the kernel address of the object, use idr to generate and lookup those handles. This might improve somewhat on security since we loose all connections to the object's kernel address. Also idr is designed to do just this. As a todo-item, since user-space handles are now generated in sequence, we can probably use a much simpler hash function to hash them. Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com> Reviewed-by: Sinclair Yeh <syeh@vmware.com> Reviewed-by: Deepak Rawat <drawat@vmware.com>
138 lines
5.2 KiB
C
138 lines
5.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0 OR MIT */
|
|
/**************************************************************************
|
|
*
|
|
* Copyright 2012-2014 VMware, Inc., Palo Alto, CA., USA
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a
|
|
* copy of this software and associated documentation files (the
|
|
* "Software"), to deal in the Software without restriction, including
|
|
* without limitation the rights to use, copy, modify, merge, publish,
|
|
* distribute, sub license, and/or sell copies of the Software, and to
|
|
* permit persons to whom the Software is furnished to do so, subject to
|
|
* the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice (including the
|
|
* next paragraph) shall be included in all copies or substantial portions
|
|
* of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
|
|
* THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
|
|
* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
|
|
* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
|
|
* USE OR OTHER DEALINGS IN THE SOFTWARE.
|
|
*
|
|
**************************************************************************/
|
|
|
|
#ifndef _VMWGFX_RESOURCE_PRIV_H_
|
|
#define _VMWGFX_RESOURCE_PRIV_H_
|
|
|
|
#include "vmwgfx_drv.h"
|
|
|
|
/*
|
|
* Extra memory required by the resource id's ida storage, which is allocated
|
|
* separately from the base object itself. We estimate an on-average 128 bytes
|
|
* per ida.
|
|
*/
|
|
#define VMW_IDA_ACC_SIZE 128
|
|
|
|
enum vmw_cmdbuf_res_state {
|
|
VMW_CMDBUF_RES_COMMITTED,
|
|
VMW_CMDBUF_RES_ADD,
|
|
VMW_CMDBUF_RES_DEL
|
|
};
|
|
|
|
/**
|
|
* struct vmw_user_resource_conv - Identify a derived user-exported resource
|
|
* type and provide a function to convert its ttm_base_object pointer to
|
|
* a struct vmw_resource
|
|
*/
|
|
struct vmw_user_resource_conv {
|
|
enum ttm_object_type object_type;
|
|
struct vmw_resource *(*base_obj_to_res)(struct ttm_base_object *base);
|
|
void (*res_free) (struct vmw_resource *res);
|
|
};
|
|
|
|
/**
|
|
* struct vmw_res_func - members and functions common for a resource type
|
|
*
|
|
* @res_type: Enum that identifies the lru list to use for eviction.
|
|
* @needs_backup: Whether the resource is guest-backed and needs
|
|
* persistent buffer storage.
|
|
* @type_name: String that identifies the resource type.
|
|
* @backup_placement: TTM placement for backup buffers.
|
|
* @may_evict Whether the resource may be evicted.
|
|
* @create: Create a hardware resource.
|
|
* @destroy: Destroy a hardware resource.
|
|
* @bind: Bind a hardware resource to persistent buffer storage.
|
|
* @unbind: Unbind a hardware resource from persistent
|
|
* buffer storage.
|
|
* @commit_notify: If the resource is a command buffer managed resource,
|
|
* callback to notify that a define or remove command
|
|
* has been committed to the device.
|
|
*/
|
|
struct vmw_res_func {
|
|
enum vmw_res_type res_type;
|
|
bool needs_backup;
|
|
const char *type_name;
|
|
struct ttm_placement *backup_placement;
|
|
bool may_evict;
|
|
|
|
int (*create) (struct vmw_resource *res);
|
|
int (*destroy) (struct vmw_resource *res);
|
|
int (*bind) (struct vmw_resource *res,
|
|
struct ttm_validate_buffer *val_buf);
|
|
int (*unbind) (struct vmw_resource *res,
|
|
bool readback,
|
|
struct ttm_validate_buffer *val_buf);
|
|
void (*commit_notify)(struct vmw_resource *res,
|
|
enum vmw_cmdbuf_res_state state);
|
|
};
|
|
|
|
/**
|
|
* struct vmw_simple_resource_func - members and functions common for the
|
|
* simple resource helpers.
|
|
* @res_func: struct vmw_res_func as described above.
|
|
* @ttm_res_type: TTM resource type used for handle recognition.
|
|
* @size: Size of the simple resource information struct.
|
|
* @init: Initialize the simple resource information.
|
|
* @hw_destroy: A resource hw_destroy function.
|
|
* @set_arg_handle: Set the handle output argument of the ioctl create struct.
|
|
*/
|
|
struct vmw_simple_resource_func {
|
|
const struct vmw_res_func res_func;
|
|
int ttm_res_type;
|
|
size_t size;
|
|
int (*init)(struct vmw_resource *res, void *data);
|
|
void (*hw_destroy)(struct vmw_resource *res);
|
|
void (*set_arg_handle)(void *data, u32 handle);
|
|
};
|
|
|
|
/**
|
|
* struct vmw_simple_resource - Kernel only side simple resource
|
|
* @res: The resource we derive from.
|
|
* @func: The method and member virtual table.
|
|
*/
|
|
struct vmw_simple_resource {
|
|
struct vmw_resource res;
|
|
const struct vmw_simple_resource_func *func;
|
|
};
|
|
|
|
int vmw_resource_alloc_id(struct vmw_resource *res);
|
|
void vmw_resource_release_id(struct vmw_resource *res);
|
|
int vmw_resource_init(struct vmw_private *dev_priv, struct vmw_resource *res,
|
|
bool delay_id,
|
|
void (*res_free) (struct vmw_resource *res),
|
|
const struct vmw_res_func *func);
|
|
int
|
|
vmw_simple_resource_create_ioctl(struct drm_device *dev,
|
|
void *data,
|
|
struct drm_file *file_priv,
|
|
const struct vmw_simple_resource_func *func);
|
|
struct vmw_resource *
|
|
vmw_simple_resource_lookup(struct ttm_object_file *tfile,
|
|
uint32_t handle,
|
|
const struct vmw_simple_resource_func *func);
|
|
#endif
|