18c2ecf20Sopenharmony_ci/* SPDX-License-Identifier: GPL-2.0-only */ 28c2ecf20Sopenharmony_ci/** 38c2ecf20Sopenharmony_ci * Copyright (C) 2008, Creative Technology Ltd. All Rights Reserved. 48c2ecf20Sopenharmony_ci * 58c2ecf20Sopenharmony_ci * @File ctvmem.h 68c2ecf20Sopenharmony_ci * 78c2ecf20Sopenharmony_ci * @Brief 88c2ecf20Sopenharmony_ci * This file contains the definition of virtual memory management object 98c2ecf20Sopenharmony_ci * for card device. 108c2ecf20Sopenharmony_ci * 118c2ecf20Sopenharmony_ci * @Author Liu Chun 128c2ecf20Sopenharmony_ci * @Date Mar 28 2008 138c2ecf20Sopenharmony_ci */ 148c2ecf20Sopenharmony_ci 158c2ecf20Sopenharmony_ci#ifndef CTVMEM_H 168c2ecf20Sopenharmony_ci#define CTVMEM_H 178c2ecf20Sopenharmony_ci 188c2ecf20Sopenharmony_ci#define CT_PTP_NUM 4 /* num of device page table pages */ 198c2ecf20Sopenharmony_ci 208c2ecf20Sopenharmony_ci#include <linux/mutex.h> 218c2ecf20Sopenharmony_ci#include <linux/list.h> 228c2ecf20Sopenharmony_ci#include <linux/pci.h> 238c2ecf20Sopenharmony_ci#include <sound/memalloc.h> 248c2ecf20Sopenharmony_ci 258c2ecf20Sopenharmony_ci/* The chip can handle the page table of 4k pages 268c2ecf20Sopenharmony_ci * (emu20k1 can handle even 8k pages, but we don't use it right now) 278c2ecf20Sopenharmony_ci */ 288c2ecf20Sopenharmony_ci#define CT_PAGE_SIZE 4096 298c2ecf20Sopenharmony_ci#define CT_PAGE_SHIFT 12 308c2ecf20Sopenharmony_ci#define CT_PAGE_MASK (~(PAGE_SIZE - 1)) 318c2ecf20Sopenharmony_ci#define CT_PAGE_ALIGN(addr) ALIGN(addr, CT_PAGE_SIZE) 328c2ecf20Sopenharmony_ci 338c2ecf20Sopenharmony_cistruct ct_vm_block { 348c2ecf20Sopenharmony_ci unsigned int addr; /* starting logical addr of this block */ 358c2ecf20Sopenharmony_ci unsigned int size; /* size of this device virtual mem block */ 368c2ecf20Sopenharmony_ci struct list_head list; 378c2ecf20Sopenharmony_ci}; 388c2ecf20Sopenharmony_ci 398c2ecf20Sopenharmony_cistruct snd_pcm_substream; 408c2ecf20Sopenharmony_ci 418c2ecf20Sopenharmony_ci/* Virtual memory management object for card device */ 428c2ecf20Sopenharmony_cistruct ct_vm { 438c2ecf20Sopenharmony_ci struct snd_dma_buffer ptp[CT_PTP_NUM]; /* Device page table pages */ 448c2ecf20Sopenharmony_ci unsigned int size; /* Available addr space in bytes */ 458c2ecf20Sopenharmony_ci struct list_head unused; /* List of unused blocks */ 468c2ecf20Sopenharmony_ci struct list_head used; /* List of used blocks */ 478c2ecf20Sopenharmony_ci struct mutex lock; 488c2ecf20Sopenharmony_ci 498c2ecf20Sopenharmony_ci /* Map host addr (kmalloced/vmalloced) to device logical addr. */ 508c2ecf20Sopenharmony_ci struct ct_vm_block *(*map)(struct ct_vm *, struct snd_pcm_substream *, 518c2ecf20Sopenharmony_ci int size); 528c2ecf20Sopenharmony_ci /* Unmap device logical addr area. */ 538c2ecf20Sopenharmony_ci void (*unmap)(struct ct_vm *, struct ct_vm_block *block); 548c2ecf20Sopenharmony_ci dma_addr_t (*get_ptp_phys)(struct ct_vm *vm, int index); 558c2ecf20Sopenharmony_ci}; 568c2ecf20Sopenharmony_ci 578c2ecf20Sopenharmony_ciint ct_vm_create(struct ct_vm **rvm, struct pci_dev *pci); 588c2ecf20Sopenharmony_civoid ct_vm_destroy(struct ct_vm *vm); 598c2ecf20Sopenharmony_ci 608c2ecf20Sopenharmony_ci#endif /* CTVMEM_H */ 61