| Wai Yew CHAY | 8cc7236 | 2009-05-14 08:05:58 +0200 | [diff] [blame^] | 1 | /** |
| 2 | * Copyright (C) 2008, Creative Technology Ltd. All Rights Reserved. |
| 3 | * |
| 4 | * This source file is released under GPL v2 license (no other versions). |
| 5 | * See the COPYING file included in the main directory of this source |
| 6 | * distribution for the license terms and conditions. |
| 7 | * |
| 8 | * @File ctvmem.h |
| 9 | * |
| 10 | * @Brief |
| 11 | * This file contains the definition of virtual memory management object |
| 12 | * for card device. |
| 13 | * |
| 14 | * @Author Liu Chun |
| 15 | * @Date Mar 28 2008 |
| 16 | */ |
| 17 | |
| 18 | #ifndef CTVMEM_H |
| 19 | #define CTVMEM_H |
| 20 | |
| 21 | #define CT_PTP_NUM 1 /* num of device page table pages */ |
| 22 | |
| 23 | #include <linux/spinlock.h> |
| 24 | #include <linux/list.h> |
| 25 | |
| 26 | struct ct_vm_block { |
| 27 | unsigned int addr; /* starting logical addr of this block */ |
| 28 | unsigned int size; /* size of this device virtual mem block */ |
| 29 | struct list_head list; |
| 30 | }; |
| 31 | |
| 32 | /* Virtual memory management object for card device */ |
| 33 | struct ct_vm { |
| 34 | void *ptp[CT_PTP_NUM]; /* Device page table pages */ |
| 35 | unsigned int size; /* Available addr space in bytes */ |
| 36 | struct list_head unused; /* List of unused blocks */ |
| 37 | struct list_head used; /* List of used blocks */ |
| 38 | |
| 39 | /* Map host addr (kmalloced/vmalloced) to device logical addr. */ |
| 40 | struct ct_vm_block *(*map)(struct ct_vm *, void *host_addr, int size); |
| 41 | /* Unmap device logical addr area. */ |
| 42 | void (*unmap)(struct ct_vm *, struct ct_vm_block *block); |
| 43 | void *(*get_ptp_virt)(struct ct_vm *vm, int index); |
| 44 | }; |
| 45 | |
| 46 | int ct_vm_create(struct ct_vm **rvm); |
| 47 | void ct_vm_destroy(struct ct_vm *vm); |
| 48 | |
| 49 | #endif /* CTVMEM_H */ |