44 lines
1.4 KiB
C
44 lines
1.4 KiB
C
|
/* SPDX-License-Identifier: GPL-2.0 */
|
||
|
|
/*
|
||
|
|
* Copyright (C) 2021 Samsung Electronics.
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef __CPIF_VMAPPER_H__
|
||
|
|
#define __CPIF_VMAPPER_H__
|
||
|
|
|
||
|
|
#include <linux/types.h>
|
||
|
|
#include <linux/slab.h>
|
||
|
|
|
||
|
|
struct cpif_vmap_item {
|
||
|
|
u64 vaddr_base; /* cp address */
|
||
|
|
u64 paddr_base; /* ap physical address */
|
||
|
|
u64 item_size;
|
||
|
|
struct list_head item;
|
||
|
|
atomic_t ref; /* if zero, this item will be unmapped */
|
||
|
|
};
|
||
|
|
|
||
|
|
/* vmapper contains vaddr that is linear, but paddr sparsed with certain size
|
||
|
|
* vmapper contains several items, and each item contains several instances
|
||
|
|
* instances have fixed size, whereas each item size may defer due to
|
||
|
|
* page allocation
|
||
|
|
*/
|
||
|
|
struct cpif_va_mapper {
|
||
|
|
u64 va_start; /* va = cp address */
|
||
|
|
u64 va_size;
|
||
|
|
u64 va_end;
|
||
|
|
u64 instance_size; /* size of instance in the item */
|
||
|
|
|
||
|
|
/* vmap table guaranteed to be mapped/unmapped sequentially */
|
||
|
|
struct list_head item_list;
|
||
|
|
struct cpif_vmap_item *out; /* item to be unmapped, after list out */
|
||
|
|
struct cpif_vmap_item *in; /* item mapped recently, before list in */
|
||
|
|
};
|
||
|
|
|
||
|
|
struct cpif_va_mapper *cpif_vmap_create(u64 va_start, u64 va_size, u64 instance_size);
|
||
|
|
void cpif_vmap_free(struct cpif_va_mapper *vmap);
|
||
|
|
u64 cpif_vmap_map_area(struct cpif_va_mapper *vmap, u64 item_paddr, u64 item_size,
|
||
|
|
u64 instance_paddr);
|
||
|
|
u64 cpif_vmap_unmap_area(struct cpif_va_mapper *vmap, u64 vaddr);
|
||
|
|
#endif /* __CPIF_VMAPPER_H__ */
|