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

 
 1/**
 2 * Copyright (C) 2008, Creative Technology Ltd. All Rights Reserved.
 3 *
 4 * This source file is released under GPL v2 license (no other versions).
 5 * See the COPYING file included in the main directory of this source
 6 * distribution for the license terms and conditions.
 7 *
 8 * @File    ctvmem.h
 9 *
10 * @Brief
11 * This file contains the definition of virtual memory management object
12 * for card device.
13 *
14 * @Author Liu Chun
15 * @Date Mar 28 2008
16 */
17
18#ifndef CTVMEM_H
19#define CTVMEM_H
20
21#define CT_PTP_NUM	4	/* num of device page table pages */
22
23#include <linux/mutex.h>
24#include <linux/list.h>
25#include <linux/pci.h>
26#include <sound/memalloc.h>
27
28/* The chip can handle the page table of 4k pages
29 * (emu20k1 can handle even 8k pages, but we don't use it right now)
30 */
31#define CT_PAGE_SIZE	4096
32#define CT_PAGE_SHIFT	12
33#define CT_PAGE_MASK	(~(PAGE_SIZE - 1))
34#define CT_PAGE_ALIGN(addr)	ALIGN(addr, CT_PAGE_SIZE)
35
36struct ct_vm_block {
37	unsigned int addr;	/* starting logical addr of this block */
38	unsigned int size;	/* size of this device virtual mem block */
39	struct list_head list;
40};
41
42struct snd_pcm_substream;
43
44/* Virtual memory management object for card device */
45struct ct_vm {
46	struct snd_dma_buffer ptp[CT_PTP_NUM];	/* Device page table pages */
47	unsigned int size;		/* Available addr space in bytes */
48	struct list_head unused;	/* List of unused blocks */
49	struct list_head used;		/* List of used blocks */
50	struct mutex lock;
51
52	/* Map host addr (kmalloced/vmalloced) to device logical addr. */
53	struct ct_vm_block *(*map)(struct ct_vm *, struct snd_pcm_substream *,
54				   int size);
55	/* Unmap device logical addr area. */
56	void (*unmap)(struct ct_vm *, struct ct_vm_block *block);
57	dma_addr_t (*get_ptp_phys)(struct ct_vm *vm, int index);
58};
59
60int ct_vm_create(struct ct_vm **rvm, struct pci_dev *pci);
61void ct_vm_destroy(struct ct_vm *vm);
62
63#endif /* CTVMEM_H */