1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0-only */ 2*4882a593Smuzhiyun /** 3*4882a593Smuzhiyun * Copyright (C) 2008, Creative Technology Ltd. All Rights Reserved. 4*4882a593Smuzhiyun * 5*4882a593Smuzhiyun * @File ctvmem.h 6*4882a593Smuzhiyun * 7*4882a593Smuzhiyun * @Brief 8*4882a593Smuzhiyun * This file contains the definition of virtual memory management object 9*4882a593Smuzhiyun * for card device. 10*4882a593Smuzhiyun * 11*4882a593Smuzhiyun * @Author Liu Chun 12*4882a593Smuzhiyun * @Date Mar 28 2008 13*4882a593Smuzhiyun */ 14*4882a593Smuzhiyun 15*4882a593Smuzhiyun #ifndef CTVMEM_H 16*4882a593Smuzhiyun #define CTVMEM_H 17*4882a593Smuzhiyun 18*4882a593Smuzhiyun #define CT_PTP_NUM 4 /* num of device page table pages */ 19*4882a593Smuzhiyun 20*4882a593Smuzhiyun #include <linux/mutex.h> 21*4882a593Smuzhiyun #include <linux/list.h> 22*4882a593Smuzhiyun #include <linux/pci.h> 23*4882a593Smuzhiyun #include <sound/memalloc.h> 24*4882a593Smuzhiyun 25*4882a593Smuzhiyun /* The chip can handle the page table of 4k pages 26*4882a593Smuzhiyun * (emu20k1 can handle even 8k pages, but we don't use it right now) 27*4882a593Smuzhiyun */ 28*4882a593Smuzhiyun #define CT_PAGE_SIZE 4096 29*4882a593Smuzhiyun #define CT_PAGE_SHIFT 12 30*4882a593Smuzhiyun #define CT_PAGE_MASK (~(PAGE_SIZE - 1)) 31*4882a593Smuzhiyun #define CT_PAGE_ALIGN(addr) ALIGN(addr, CT_PAGE_SIZE) 32*4882a593Smuzhiyun 33*4882a593Smuzhiyun struct ct_vm_block { 34*4882a593Smuzhiyun unsigned int addr; /* starting logical addr of this block */ 35*4882a593Smuzhiyun unsigned int size; /* size of this device virtual mem block */ 36*4882a593Smuzhiyun struct list_head list; 37*4882a593Smuzhiyun }; 38*4882a593Smuzhiyun 39*4882a593Smuzhiyun struct snd_pcm_substream; 40*4882a593Smuzhiyun 41*4882a593Smuzhiyun /* Virtual memory management object for card device */ 42*4882a593Smuzhiyun struct ct_vm { 43*4882a593Smuzhiyun struct snd_dma_buffer ptp[CT_PTP_NUM]; /* Device page table pages */ 44*4882a593Smuzhiyun unsigned int size; /* Available addr space in bytes */ 45*4882a593Smuzhiyun struct list_head unused; /* List of unused blocks */ 46*4882a593Smuzhiyun struct list_head used; /* List of used blocks */ 47*4882a593Smuzhiyun struct mutex lock; 48*4882a593Smuzhiyun 49*4882a593Smuzhiyun /* Map host addr (kmalloced/vmalloced) to device logical addr. */ 50*4882a593Smuzhiyun struct ct_vm_block *(*map)(struct ct_vm *, struct snd_pcm_substream *, 51*4882a593Smuzhiyun int size); 52*4882a593Smuzhiyun /* Unmap device logical addr area. */ 53*4882a593Smuzhiyun void (*unmap)(struct ct_vm *, struct ct_vm_block *block); 54*4882a593Smuzhiyun dma_addr_t (*get_ptp_phys)(struct ct_vm *vm, int index); 55*4882a593Smuzhiyun }; 56*4882a593Smuzhiyun 57*4882a593Smuzhiyun int ct_vm_create(struct ct_vm **rvm, struct pci_dev *pci); 58*4882a593Smuzhiyun void ct_vm_destroy(struct ct_vm *vm); 59*4882a593Smuzhiyun 60*4882a593Smuzhiyun #endif /* CTVMEM_H */ 61