18cc72361SWai Yew CHAY /** 28cc72361SWai Yew CHAY * Copyright (C) 2008, Creative Technology Ltd. All Rights Reserved. 38cc72361SWai Yew CHAY * 48cc72361SWai Yew CHAY * This source file is released under GPL v2 license (no other versions). 58cc72361SWai Yew CHAY * See the COPYING file included in the main directory of this source 68cc72361SWai Yew CHAY * distribution for the license terms and conditions. 78cc72361SWai Yew CHAY * 88cc72361SWai Yew CHAY * @File ctvmem.h 98cc72361SWai Yew CHAY * 108cc72361SWai Yew CHAY * @Brief 118cc72361SWai Yew CHAY * This file contains the definition of virtual memory management object 128cc72361SWai Yew CHAY * for card device. 138cc72361SWai Yew CHAY * 148cc72361SWai Yew CHAY * @Author Liu Chun 158cc72361SWai Yew CHAY * @Date Mar 28 2008 168cc72361SWai Yew CHAY */ 178cc72361SWai Yew CHAY 188cc72361SWai Yew CHAY #ifndef CTVMEM_H 198cc72361SWai Yew CHAY #define CTVMEM_H 208cc72361SWai Yew CHAY 218cc72361SWai Yew CHAY #define CT_PTP_NUM 1 /* num of device page table pages */ 228cc72361SWai Yew CHAY 238a4259bfSTakashi Iwai #include <linux/mutex.h> 248cc72361SWai Yew CHAY #include <linux/list.h> 2521956b61SJaroslav Kysela #include <linux/pci.h> 2621956b61SJaroslav Kysela #include <sound/memalloc.h> 278cc72361SWai Yew CHAY 28cd391e20STakashi Iwai /* The chip can handle the page table of 4k pages 29cd391e20STakashi Iwai * (emu20k1 can handle even 8k pages, but we don't use it right now) 30cd391e20STakashi Iwai */ 31cd391e20STakashi Iwai #define CT_PAGE_SIZE 4096 32cd391e20STakashi Iwai #define CT_PAGE_SHIFT 12 33cd391e20STakashi Iwai #define CT_PAGE_MASK (~(PAGE_SIZE - 1)) 34cd391e20STakashi Iwai #define CT_PAGE_ALIGN(addr) ALIGN(addr, CT_PAGE_SIZE) 35cd391e20STakashi Iwai 368cc72361SWai Yew CHAY struct ct_vm_block { 378cc72361SWai Yew CHAY unsigned int addr; /* starting logical addr of this block */ 388cc72361SWai Yew CHAY unsigned int size; /* size of this device virtual mem block */ 398cc72361SWai Yew CHAY struct list_head list; 408cc72361SWai Yew CHAY }; 418cc72361SWai Yew CHAY 42c76157d9STakashi Iwai struct snd_pcm_substream; 43c76157d9STakashi Iwai 448cc72361SWai Yew CHAY /* Virtual memory management object for card device */ 458cc72361SWai Yew CHAY struct ct_vm { 4621956b61SJaroslav Kysela struct snd_dma_buffer ptp[CT_PTP_NUM]; /* Device page table pages */ 478cc72361SWai Yew CHAY unsigned int size; /* Available addr space in bytes */ 488cc72361SWai Yew CHAY struct list_head unused; /* List of unused blocks */ 498cc72361SWai Yew CHAY struct list_head used; /* List of used blocks */ 508a4259bfSTakashi Iwai struct mutex lock; 518cc72361SWai Yew CHAY 528cc72361SWai Yew CHAY /* Map host addr (kmalloced/vmalloced) to device logical addr. */ 53c76157d9STakashi Iwai struct ct_vm_block *(*map)(struct ct_vm *, struct snd_pcm_substream *, 54c76157d9STakashi Iwai int size); 558cc72361SWai Yew CHAY /* Unmap device logical addr area. */ 568cc72361SWai Yew CHAY void (*unmap)(struct ct_vm *, struct ct_vm_block *block); 5721956b61SJaroslav Kysela dma_addr_t (*get_ptp_phys)(struct ct_vm *vm, int index); 588cc72361SWai Yew CHAY }; 598cc72361SWai Yew CHAY 6021956b61SJaroslav Kysela int ct_vm_create(struct ct_vm **rvm, struct pci_dev *pci); 618cc72361SWai Yew CHAY void ct_vm_destroy(struct ct_vm *vm); 628cc72361SWai Yew CHAY 638cc72361SWai Yew CHAY #endif /* CTVMEM_H */ 64