https://github.com/torvalds/linux
- HEAD
- refs/heads/arm64-uaccess
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/certifi-2024.7.4
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/idna-3.7
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/requests-2.32.2
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/setuptools-70.0.0
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/urllib3-2.2.2
- refs/heads/master
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Tip revision: 2734d6c1b1a089fb593ef6a23d4b70903526fe0c authored by Linus Torvalds on 18 July 2021, 21:13:49 UTC
Linux 5.14-rc2
Linux 5.14-rc2
Tip revision: 2734d6c
ctvmem.h
/* 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 */