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- /* SPDX-License-Identifier: GPL-2.0-only */
- /*
- * Copyright (C) 2008, Creative Technology Ltd. All Rights Reserved.
- *
- * @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 4 /* num of device page table pages */
- #include <linux/mutex.h>
- #include <linux/list.h>
- #include <linux/pci.h>
- #include <sound/memalloc.h>
- /* The chip can handle the page table of 4k pages
- * (emu20k1 can handle even 8k pages, but we don't use it right now)
- */
- #define CT_PAGE_SIZE 4096
- #define CT_PAGE_SHIFT 12
- #define CT_PAGE_MASK (~(PAGE_SIZE - 1))
- #define CT_PAGE_ALIGN(addr) ALIGN(addr, CT_PAGE_SIZE)
- 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;
- };
- struct snd_pcm_substream;
- /* Virtual memory management object for card device */
- struct ct_vm {
- struct snd_dma_buffer 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 */
- struct mutex lock;
- /* Map host addr (kmalloced/vmalloced) to device logical addr. */
- struct ct_vm_block *(*map)(struct ct_vm *, struct snd_pcm_substream *,
- int size);
- /* Unmap device logical addr area. */
- void (*unmap)(struct ct_vm *, struct ct_vm_block *block);
- dma_addr_t (*get_ptp_phys)(struct ct_vm *vm, int index);
- };
- int ct_vm_create(struct ct_vm **rvm, struct pci_dev *pci);
- void ct_vm_destroy(struct ct_vm *vm);
- #endif /* CTVMEM_H */
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