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Diffstat (limited to 'sound/pci/ctxfi/ctvmem.h')
| -rw-r--r-- | sound/pci/ctxfi/ctvmem.h | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/sound/pci/ctxfi/ctvmem.h b/sound/pci/ctxfi/ctvmem.h new file mode 100644 index 000000000000..4eb5bdd5cad4 --- /dev/null +++ b/sound/pci/ctxfi/ctvmem.h @@ -0,0 +1,49 @@ +/** + * Copyright (C) 2008, Creative Technology Ltd. All Rights Reserved. + * + * This source file is released under GPL v2 license (no other versions). + * See the COPYING file included in the main directory of this source + * distribution for the license terms and conditions. + * + * @File ctvmem.h + * + * @Brief + * This file contains the definition of virtual memory management object + * for card device. + * + * @Author Liu Chun + * @Date Mar 28 2008 + */ + +#ifndef CTVMEM_H +#define CTVMEM_H + +#define CT_PTP_NUM 1 /* num of device page table pages */ + +#include <linux/spinlock.h> +#include <linux/list.h> + +struct ct_vm_block { + unsigned int addr; /* starting logical addr of this block */ + unsigned int size; /* size of this device virtual mem block */ + struct list_head list; +}; + +/* Virtual memory management object for card device */ +struct ct_vm { + void *ptp[CT_PTP_NUM]; /* Device page table pages */ + unsigned int size; /* Available addr space in bytes */ + struct list_head unused; /* List of unused blocks */ + struct list_head used; /* List of used blocks */ + + /* Map host addr (kmalloced/vmalloced) to device logical addr. */ + struct ct_vm_block *(*map)(struct ct_vm *, void *host_addr, int size); + /* Unmap device logical addr area. */ + void (*unmap)(struct ct_vm *, struct ct_vm_block *block); + void *(*get_ptp_virt)(struct ct_vm *vm, int index); +}; + +int ct_vm_create(struct ct_vm **rvm); +void ct_vm_destroy(struct ct_vm *vm); + +#endif /* CTVMEM_H */ |