diff options
| author | Jens Axboe <axboe@suse.de> | 2004-03-11 15:56:51 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2004-03-11 15:56:51 -0800 |
| commit | f644f1667358af42f05c81fa32a4bb96781377fa (patch) | |
| tree | f85fb4813d79ce4fae0dcde611715edf4fa1ceb2 /include/linux | |
| parent | 637b48c8306137e805970b07f7dec37eea9d6bb8 (diff) | |
[PATCH] CDROMREADAUDIO dma support
This small patch builds on top of the blk_rq_map_user() patch just sent,
and enables us to easily support DMA for CDROMREADAUDIO cdda extraction.
It's quite amazing how much cool stuff you can with the new block layer
:-)
Patch has intelligent fall back from multi frame dma to single frame
dma, and further to old-style pio ripping in case of hardware problems.
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/cdrom.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/include/linux/cdrom.h b/include/linux/cdrom.h index 513ac8f4e9a2..a4e851d4a335 100644 --- a/include/linux/cdrom.h +++ b/include/linux/cdrom.h @@ -877,10 +877,18 @@ struct mode_page_header { #include <linux/fs.h> /* not really needed, later.. */ #include <linux/device.h> +/* + * _OLD will use PIO transfer on atapi devices, _BPC_* will use DMA + */ +#define CDDA_OLD 0 /* old style */ +#define CDDA_BPC_SINGLE 1 /* single frame block pc */ +#define CDDA_BPC_FULL 2 /* multi frame block pc */ + /* Uniform cdrom data structures for cdrom.c */ struct cdrom_device_info { struct cdrom_device_ops *ops; /* link to device_ops */ struct cdrom_device_info *next; /* next device_info for this major */ + struct gendisk *disk; /* matching block layer disk */ void *handle; /* driver-dependent data */ /* specifications */ int mask; /* mask of capability: disables them */ @@ -894,6 +902,8 @@ struct cdrom_device_info { /* per-device flags */ __u8 sanyo_slot : 2; /* Sanyo 3 CD changer support */ __u8 reserved : 6; /* not used yet */ + int cdda_method; /* see flags */ + __u8 last_sense; int for_data; int (*exit)(struct cdrom_device_info *); int mrw_mode_page; |