15765e78eSThomas Gleixner /* SPDX-License-Identifier: GPL-2.0-only */ 2*a08b9f2fSAditya Srivastava /* 38cc72361SWai Yew CHAY * Copyright (C) 2008, Creative Technology Ltd. All Rights Reserved. 48cc72361SWai Yew CHAY * 58cc72361SWai Yew CHAY * @File ctvmem.h 68cc72361SWai Yew CHAY * 78cc72361SWai Yew CHAY * @Brief 88cc72361SWai Yew CHAY * This file contains the definition of virtual memory management object 98cc72361SWai Yew CHAY * for card device. 108cc72361SWai Yew CHAY * 118cc72361SWai Yew CHAY * @Author Liu Chun 128cc72361SWai Yew CHAY * @Date Mar 28 2008 138cc72361SWai Yew CHAY */ 148cc72361SWai Yew CHAY 158cc72361SWai Yew CHAY #ifndef CTVMEM_H 168cc72361SWai Yew CHAY #define CTVMEM_H 178cc72361SWai Yew CHAY 18391e6914SMaarten Lankhorst #define CT_PTP_NUM 4 /* num of device page table pages */ 198cc72361SWai Yew CHAY 208a4259bfSTakashi Iwai #include <linux/mutex.h> 218cc72361SWai Yew CHAY #include <linux/list.h> 2221956b61SJaroslav Kysela #include <linux/pci.h> 2321956b61SJaroslav Kysela #include <sound/memalloc.h> 248cc72361SWai Yew CHAY 25cd391e20STakashi Iwai /* The chip can handle the page table of 4k pages 26cd391e20STakashi Iwai * (emu20k1 can handle even 8k pages, but we don't use it right now) 27cd391e20STakashi Iwai */ 28cd391e20STakashi Iwai #define CT_PAGE_SIZE 4096 29cd391e20STakashi Iwai #define CT_PAGE_SHIFT 12 30cd391e20STakashi Iwai #define CT_PAGE_MASK (~(PAGE_SIZE - 1)) 31cd391e20STakashi Iwai #define CT_PAGE_ALIGN(addr) ALIGN(addr, CT_PAGE_SIZE) 32cd391e20STakashi Iwai 338cc72361SWai Yew CHAY struct ct_vm_block { 348cc72361SWai Yew CHAY unsigned int addr; /* starting logical addr of this block */ 358cc72361SWai Yew CHAY unsigned int size; /* size of this device virtual mem block */ 368cc72361SWai Yew CHAY struct list_head list; 378cc72361SWai Yew CHAY }; 388cc72361SWai Yew CHAY 39c76157d9STakashi Iwai struct snd_pcm_substream; 40c76157d9STakashi Iwai 418cc72361SWai Yew CHAY /* Virtual memory management object for card device */ 428cc72361SWai Yew CHAY struct ct_vm { 4321956b61SJaroslav Kysela struct snd_dma_buffer ptp[CT_PTP_NUM]; /* Device page table pages */ 448cc72361SWai Yew CHAY unsigned int size; /* Available addr space in bytes */ 458cc72361SWai Yew CHAY struct list_head unused; /* List of unused blocks */ 468cc72361SWai Yew CHAY struct list_head used; /* List of used blocks */ 478a4259bfSTakashi Iwai struct mutex lock; 488cc72361SWai Yew CHAY 498cc72361SWai Yew CHAY /* Map host addr (kmalloced/vmalloced) to device logical addr. */ 50c76157d9STakashi Iwai struct ct_vm_block *(*map)(struct ct_vm *, struct snd_pcm_substream *, 51c76157d9STakashi Iwai int size); 528cc72361SWai Yew CHAY /* Unmap device logical addr area. */ 538cc72361SWai Yew CHAY void (*unmap)(struct ct_vm *, struct ct_vm_block *block); 5421956b61SJaroslav Kysela dma_addr_t (*get_ptp_phys)(struct ct_vm *vm, int index); 558cc72361SWai Yew CHAY }; 568cc72361SWai Yew CHAY 5721956b61SJaroslav Kysela int ct_vm_create(struct ct_vm **rvm, struct pci_dev *pci); 588cc72361SWai Yew CHAY void ct_vm_destroy(struct ct_vm *vm); 598cc72361SWai Yew CHAY 608cc72361SWai Yew CHAY #endif /* CTVMEM_H */ 61