mirror of
https://github.com/torvalds/linux.git
synced 2024-11-17 01:22:07 +00:00
233bde21aa
It happens often while I'm preparing a patch for a block driver that I'm wondering: is a definition of SECTOR_SIZE and/or SECTOR_SHIFT available for this driver? Do I have to introduce definitions of these constants before I can use these constants? To avoid this confusion, move the existing definitions of SECTOR_SIZE and SECTOR_SHIFT into the <linux/blkdev.h> header file such that these become available for all block drivers. Make the SECTOR_SIZE definition in the uapi msdos_fs.h header file conditional to avoid that including that header file after <linux/blkdev.h> causes the compiler to complain about a SECTOR_SIZE redefinition. Note: the SECTOR_SIZE / SECTOR_SHIFT / SECTOR_BITS definitions have not been removed from uapi header files nor from NAND drivers in which these constants are used for another purpose than converting block layer offsets and sizes into a number of sectors. Cc: David S. Miller <davem@davemloft.net> Cc: Mike Snitzer <snitzer@redhat.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Minchan Kim <minchan@kernel.org> Cc: Nitin Gupta <ngupta@vflare.org> Reviewed-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de> Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Bart Van Assche <bart.vanassche@wdc.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
124 lines
3.4 KiB
C
124 lines
3.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
/*
|
|
* Copyright (C) 1996-98 Erik Andersen
|
|
* Copyright (C) 1998-2000 Jens Axboe
|
|
*/
|
|
#ifndef _IDE_CD_H
|
|
#define _IDE_CD_H
|
|
|
|
#include <linux/cdrom.h>
|
|
#include <asm/byteorder.h>
|
|
|
|
#define IDECD_DEBUG_LOG 0
|
|
|
|
#if IDECD_DEBUG_LOG
|
|
#define ide_debug_log(lvl, fmt, args...) __ide_debug_log(lvl, fmt, ## args)
|
|
#else
|
|
#define ide_debug_log(lvl, fmt, args...) do {} while (0)
|
|
#endif
|
|
|
|
#define ATAPI_WAIT_WRITE_BUSY (10 * HZ)
|
|
|
|
/************************************************************************/
|
|
|
|
#define SECTORS_PER_FRAME (CD_FRAMESIZE >> SECTOR_SHIFT)
|
|
#define SECTOR_BUFFER_SIZE (CD_FRAMESIZE * 32)
|
|
|
|
/* Capabilities Page size including 8 bytes of Mode Page Header */
|
|
#define ATAPI_CAPABILITIES_PAGE_SIZE (8 + 20)
|
|
#define ATAPI_CAPABILITIES_PAGE_PAD_SIZE 4
|
|
|
|
/* Structure of a MSF cdrom address. */
|
|
struct atapi_msf {
|
|
u8 reserved;
|
|
u8 minute;
|
|
u8 second;
|
|
u8 frame;
|
|
};
|
|
|
|
/* Space to hold the disk TOC. */
|
|
#define MAX_TRACKS 99
|
|
struct atapi_toc_header {
|
|
unsigned short toc_length;
|
|
u8 first_track;
|
|
u8 last_track;
|
|
};
|
|
|
|
struct atapi_toc_entry {
|
|
u8 reserved1;
|
|
#if defined(__BIG_ENDIAN_BITFIELD)
|
|
u8 adr : 4;
|
|
u8 control : 4;
|
|
#elif defined(__LITTLE_ENDIAN_BITFIELD)
|
|
u8 control : 4;
|
|
u8 adr : 4;
|
|
#else
|
|
#error "Please fix <asm/byteorder.h>"
|
|
#endif
|
|
u8 track;
|
|
u8 reserved2;
|
|
union {
|
|
unsigned lba;
|
|
struct atapi_msf msf;
|
|
} addr;
|
|
};
|
|
|
|
struct atapi_toc {
|
|
int last_session_lba;
|
|
int xa_flag;
|
|
unsigned long capacity;
|
|
struct atapi_toc_header hdr;
|
|
struct atapi_toc_entry ent[MAX_TRACKS+1];
|
|
/* One extra for the leadout. */
|
|
};
|
|
|
|
/* Extra per-device info for cdrom drives. */
|
|
struct cdrom_info {
|
|
ide_drive_t *drive;
|
|
struct ide_driver *driver;
|
|
struct gendisk *disk;
|
|
struct device dev;
|
|
|
|
/* Buffer for table of contents. NULL if we haven't allocated
|
|
a TOC buffer for this device yet. */
|
|
|
|
struct atapi_toc *toc;
|
|
|
|
u8 max_speed; /* Max speed of the drive. */
|
|
u8 current_speed; /* Current speed of the drive. */
|
|
|
|
/* Per-device info needed by cdrom.c generic driver. */
|
|
struct cdrom_device_info devinfo;
|
|
|
|
unsigned long write_timeout;
|
|
};
|
|
|
|
/* ide-cd_verbose.c */
|
|
void ide_cd_log_error(const char *, struct request *, struct request_sense *);
|
|
|
|
/* ide-cd.c functions used by ide-cd_ioctl.c */
|
|
int ide_cd_queue_pc(ide_drive_t *, const unsigned char *, int, void *,
|
|
unsigned *, struct request_sense *, int, req_flags_t);
|
|
int ide_cd_read_toc(ide_drive_t *, struct request_sense *);
|
|
int ide_cdrom_get_capabilities(ide_drive_t *, u8 *);
|
|
void ide_cdrom_update_speed(ide_drive_t *, u8 *);
|
|
int cdrom_check_status(ide_drive_t *, struct request_sense *);
|
|
|
|
/* ide-cd_ioctl.c */
|
|
int ide_cdrom_open_real(struct cdrom_device_info *, int);
|
|
void ide_cdrom_release_real(struct cdrom_device_info *);
|
|
int ide_cdrom_drive_status(struct cdrom_device_info *, int);
|
|
unsigned int ide_cdrom_check_events_real(struct cdrom_device_info *,
|
|
unsigned int clearing, int slot_nr);
|
|
int ide_cdrom_tray_move(struct cdrom_device_info *, int);
|
|
int ide_cdrom_lock_door(struct cdrom_device_info *, int);
|
|
int ide_cdrom_select_speed(struct cdrom_device_info *, int);
|
|
int ide_cdrom_get_last_session(struct cdrom_device_info *,
|
|
struct cdrom_multisession *);
|
|
int ide_cdrom_get_mcn(struct cdrom_device_info *, struct cdrom_mcn *);
|
|
int ide_cdrom_reset(struct cdrom_device_info *cdi);
|
|
int ide_cdrom_audio_ioctl(struct cdrom_device_info *, unsigned int, void *);
|
|
int ide_cdrom_packet(struct cdrom_device_info *, struct packet_command *);
|
|
|
|
#endif /* _IDE_CD_H */
|