/* SPDX-License-Identifier: GPL-2.0 OR MIT */
/**************************************************************************
*
* Copyright © 2018 - 2022 VMware , Inc . , Palo Alto , CA . , USA
* All Rights Reserved .
*
* 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_VALIDATION_H_
#define _VMWGFX_VALIDATION_H_
#include <linux/list.h>
#include <linux/hashtable.h>
#include <linux/ww_mutex.h>
#include <drm/ttm/ttm_execbuf_util.h>
#define VMW_RES_DIRTY_NONE 0
#define VMW_RES_DIRTY_SET BIT(0 )
#define VMW_RES_DIRTY_CLEAR BIT(1 )
/**
* struct vmw_validation_context - Per command submission validation context
* @ ht : Hash table used to find resource - or buffer object duplicates
* @ resource_list : List head for resource validation metadata
* @ resource_ctx_list : List head for resource validation metadata for
* resources that need to be validated before those in @ resource_list
* @ bo_list : List head for buffer objects
* @ page_list : List of pages used by the memory allocator
* @ ticket : Ticked used for ww mutex locking
* @ res_mutex : Pointer to mutex used for resource reserving
* @ merge_dups : Whether to merge metadata for duplicate resources or
* buffer objects
* @ mem_size_left : Free memory left in the last page in @ page_list
* @ page_address : Kernel virtual address of the last page in @ page_list
*/
struct vmw_validation_context {
struct vmw_sw_context *sw_context;
struct list_head resource_list;
struct list_head resource_ctx_list;
struct list_head bo_list;
struct list_head page_list;
struct ww_acquire_ctx ticket;
struct mutex *res_mutex;
unsigned int merge_dups;
unsigned int mem_size_left;
u8 *page_address;
};
struct vmw_bo;
struct vmw_resource;
struct vmw_fence_obj;
#if 0
/**
* DECLARE_VAL_CONTEXT - Declare a validation context with initialization
* @ _ name : The name of the variable
* @ _ sw_context : Contains the hash table used to find dups or NULL if none
* @ _ merge_dups : Whether to merge duplicate buffer object - or resource
* entries . If set to true , ideally a hash table pointer should be supplied
* as well unless the number of resources and buffer objects per validation
* is known to be very small
*/
#endif
#define DECLARE_VAL_CONTEXT(_name, _sw_context, _merge_dups) \
struct vmw_validation_context _name = \
{ .sw_context = _sw_context, \
.resource_list = LIST_HEAD_INIT((_name).resource_list), \
.resource_ctx_list = LIST_HEAD_INIT((_name).resource_ctx_list), \
.bo_list = LIST_HEAD_INIT((_name).bo_list), \
.page_list = LIST_HEAD_INIT((_name).page_list), \
.res_mutex = NULL, \
.merge_dups = _merge_dups, \
.mem_size_left = 0 , \
}
/**
* vmw_validation_has_bos - return whether the validation context has
* any buffer objects registered .
*
* @ ctx : The validation context
* Returns : Whether any buffer objects are registered
*/
static inline bool
vmw_validation_has_bos(struct vmw_validation_context *ctx)
{
return !list_empty(&ctx->bo_list);
}
/**
* vmw_validation_bo_reserve - Reserve buffer objects registered with a
* validation context
* @ ctx : The validation context
* @ intr : Perform waits interruptible
*
* Return : Zero on success , - ERESTARTSYS when interrupted , negative error
* code on failure
*/
static inline int
vmw_validation_bo_reserve(struct vmw_validation_context *ctx,
bool intr)
{
return ttm_eu_reserve_buffers(&ctx->ticket, &ctx->bo_list, intr,
NULL);
}
/**
* vmw_validation_bo_fence - Unreserve and fence buffer objects registered
* with a validation context
* @ ctx : The validation context
*
* This function unreserves the buffer objects previously reserved using
* vmw_validation_bo_reserve , and fences them with a fence object .
*/
static inline void
vmw_validation_bo_fence(struct vmw_validation_context *ctx,
struct vmw_fence_obj *fence)
{
ttm_eu_fence_buffer_objects(&ctx->ticket, &ctx->bo_list,
(void *) fence);
}
/**
* vmw_validation_align - Align a validation memory allocation
* @ val : The size to be aligned
*
* Returns : @ val aligned to the granularity used by the validation memory
* allocator .
*/
static inline unsigned int vmw_validation_align(unsigned int val)
{
return ALIGN(val, sizeof (long ));
}
int vmw_validation_add_bo(struct vmw_validation_context *ctx,
struct vmw_bo *vbo);
int vmw_validation_bo_validate(struct vmw_validation_context *ctx, bool intr);
void vmw_validation_unref_lists(struct vmw_validation_context *ctx);
int vmw_validation_add_resource(struct vmw_validation_context *ctx,
struct vmw_resource *res,
size_t priv_size,
u32 dirty,
void **p_node,
bool *first_usage);
void vmw_validation_drop_ht(struct vmw_validation_context *ctx);
int vmw_validation_res_reserve(struct vmw_validation_context *ctx,
bool intr);
void vmw_validation_res_unreserve(struct vmw_validation_context *ctx,
bool backoff);
void vmw_validation_res_switch_backup(struct vmw_validation_context *ctx,
void *val_private,
struct vmw_bo *vbo,
unsigned long backup_offset);
int vmw_validation_res_validate(struct vmw_validation_context *ctx, bool intr);
int vmw_validation_prepare(struct vmw_validation_context *ctx,
struct mutex *mutex, bool intr);
void vmw_validation_revert(struct vmw_validation_context *ctx);
void vmw_validation_done(struct vmw_validation_context *ctx,
struct vmw_fence_obj *fence);
void *vmw_validation_mem_alloc(struct vmw_validation_context *ctx,
unsigned int size);
int vmw_validation_preload_bo(struct vmw_validation_context *ctx);
int vmw_validation_preload_res(struct vmw_validation_context *ctx,
unsigned int size);
void vmw_validation_res_set_dirty(struct vmw_validation_context *ctx,
void *val_private, u32 dirty);
void vmw_validation_bo_backoff(struct vmw_validation_context *ctx);
#endif
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(vorverarbeitet am 2026-10-02)
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