diff options
author | Takashi Iwai <tiwai@suse.de> | 2009-06-10 07:26:27 +0200 |
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committer | Takashi Iwai <tiwai@suse.de> | 2009-06-10 07:26:27 +0200 |
commit | e618a5609e504845786c71e2825e10b6a9728185 (patch) | |
tree | 6c9e1a40216b776923567f9b3506a8fee66dec89 /sound/pci/ctxfi/ctvmem.h | |
parent | d3e3743694cbfd64450b3468e11b40ba8c6f4369 (diff) | |
parent | a5990dc5b96f537618b0f057c8723a6a0b0cdc74 (diff) |
Merge branch 'topic/ctxfi' into for-linus
* topic/ctxfi: (35 commits)
ALSA: ctxfi - Clear PCM resources at hw_params and hw_free
ALSA: ctxfi - Check the presence of SRC instance in PCM pointer callbacks
ALSA: ctxfi - Add missing start check in atc_pcm_playback_start()
ALSA: ctxfi - Add use_system_timer module option
ALSA: ctxfi - Fix wrong model id for UAA
ALSA: ctxfi - Clean up probe routines
ALSA: ctxfi - Fix / clean up hw20k2 chip code
ALSA: ctxfi - Fix possible buffer pointer overrun
ALSA: ctxfi - Remove useless initializations and cast
ALSA: ctxfi - Fix DMA mask for emu20k2 chip
ALSA: ctxfi - Make volume controls more intuitive
ALSA: ctxfi - Optimize the native timer handling using wc counter
ALSA: ctxfi - Add missing inclusion of linux/math64.h
ALSA: ctxfi - Set device 0 for mixer control elements
ALSA: ctxfi - Clean up / optimize
ALSA: ctxfi - Set periods_min to 2
ALSA: ctxfi - Use native timer interrupt on emu20k1
ALSA: ctxfi - Fix previous fix for 64bit DMA
ALSA: ctxfi - Fix endian-dependent codes
ALSA: ctxfi - Allow 64bit DMA
...
Diffstat (limited to 'sound/pci/ctxfi/ctvmem.h')
-rw-r--r-- | sound/pci/ctxfi/ctvmem.h | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/sound/pci/ctxfi/ctvmem.h b/sound/pci/ctxfi/ctvmem.h new file mode 100644 index 00000000000..01e4fd0386a --- /dev/null +++ b/sound/pci/ctxfi/ctvmem.h @@ -0,0 +1,61 @@ +/** + * Copyright (C) 2008, Creative Technology Ltd. All Rights Reserved. + * + * This source file is released under GPL v2 license (no other versions). + * See the COPYING file included in the main directory of this source + * distribution for the license terms and conditions. + * + * @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 1 /* num of device page table pages */ + +#include <linux/mutex.h> +#include <linux/list.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 { + void *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); + void *(*get_ptp_virt)(struct ct_vm *vm, int index); +}; + +int ct_vm_create(struct ct_vm **rvm); +void ct_vm_destroy(struct ct_vm *vm); + +#endif /* CTVMEM_H */ |