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8cc72361 WYC |
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 | ||
391e6914 | 21 | #define CT_PTP_NUM 4 /* num of device page table pages */ |
8cc72361 | 22 | |
8a4259bf | 23 | #include <linux/mutex.h> |
8cc72361 | 24 | #include <linux/list.h> |
21956b61 JK |
25 | #include <linux/pci.h> |
26 | #include <sound/memalloc.h> | |
8cc72361 | 27 | |
cd391e20 TI |
28 | /* The chip can handle the page table of 4k pages |
29 | * (emu20k1 can handle even 8k pages, but we don't use it right now) | |
30 | */ | |
31 | #define CT_PAGE_SIZE 4096 | |
32 | #define CT_PAGE_SHIFT 12 | |
33 | #define CT_PAGE_MASK (~(PAGE_SIZE - 1)) | |
34 | #define CT_PAGE_ALIGN(addr) ALIGN(addr, CT_PAGE_SIZE) | |
35 | ||
8cc72361 WYC |
36 | struct ct_vm_block { |
37 | unsigned int addr; /* starting logical addr of this block */ | |
38 | unsigned int size; /* size of this device virtual mem block */ | |
39 | struct list_head list; | |
40 | }; | |
41 | ||
c76157d9 TI |
42 | struct snd_pcm_substream; |
43 | ||
8cc72361 WYC |
44 | /* Virtual memory management object for card device */ |
45 | struct ct_vm { | |
21956b61 | 46 | struct snd_dma_buffer ptp[CT_PTP_NUM]; /* Device page table pages */ |
8cc72361 WYC |
47 | unsigned int size; /* Available addr space in bytes */ |
48 | struct list_head unused; /* List of unused blocks */ | |
49 | struct list_head used; /* List of used blocks */ | |
8a4259bf | 50 | struct mutex lock; |
8cc72361 WYC |
51 | |
52 | /* Map host addr (kmalloced/vmalloced) to device logical addr. */ | |
c76157d9 TI |
53 | struct ct_vm_block *(*map)(struct ct_vm *, struct snd_pcm_substream *, |
54 | int size); | |
8cc72361 WYC |
55 | /* Unmap device logical addr area. */ |
56 | void (*unmap)(struct ct_vm *, struct ct_vm_block *block); | |
21956b61 | 57 | dma_addr_t (*get_ptp_phys)(struct ct_vm *vm, int index); |
8cc72361 WYC |
58 | }; |
59 | ||
21956b61 | 60 | int ct_vm_create(struct ct_vm **rvm, struct pci_dev *pci); |
8cc72361 WYC |
61 | void ct_vm_destroy(struct ct_vm *vm); |
62 | ||
63 | #endif /* CTVMEM_H */ |