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968c496413
This removes the internal ide-cd buffer and falls back to read-ahead block layer capabilities. Thorough testing (cd burning, dvd read, raw read) gives with the bufferless mode marginally better performance in addition to simplified code. bufferless: dd: reading `/dev/hdc': Input/output error 6238+0 records in 6238+0 records out 204406784 bytes (204 MB) copied, 259.891 s, 787 kB/s real 4m21.598s user 0m0.014s sys 0m0.744s with the old buffer (2.6.25-rc1): dd: reading `/dev/hdc': Input/output error 6238+0 records in 6238+0 records out 204406784 bytes (204 MB) copied, 262.893 s, 778 kB/s real 4m22.938s user 0m0.009s sys 0m0.771s Signed-off-by: Borislav Petkov <petkovbb@gmail.com> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
168 lines
4.8 KiB
C
168 lines
4.8 KiB
C
/*
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* Copyright (C) 1996-98 Erik Andersen
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* Copyright (C) 1998-2000 Jens Axboe
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*/
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#ifndef _IDE_CD_H
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#define _IDE_CD_H
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#include <linux/cdrom.h>
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#include <asm/byteorder.h>
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/*
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* typical timeout for packet command
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*/
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#define ATAPI_WAIT_PC (60 * HZ)
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#define ATAPI_WAIT_WRITE_BUSY (10 * HZ)
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/************************************************************************/
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#define SECTOR_BITS 9
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#ifndef SECTOR_SIZE
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#define SECTOR_SIZE (1 << SECTOR_BITS)
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#endif
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#define SECTORS_PER_FRAME (CD_FRAMESIZE >> SECTOR_BITS)
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#define SECTOR_BUFFER_SIZE (CD_FRAMESIZE * 32)
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/* Capabilities Page size including 8 bytes of Mode Page Header */
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#define ATAPI_CAPABILITIES_PAGE_SIZE (8 + 20)
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#define ATAPI_CAPABILITIES_PAGE_PAD_SIZE 4
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enum {
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/* Device sends an interrupt when ready for a packet command. */
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IDE_CD_FLAG_DRQ_INTERRUPT = (1 << 0),
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/* Drive cannot lock the door. */
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IDE_CD_FLAG_NO_DOORLOCK = (1 << 1),
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/* Drive cannot eject the disc. */
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IDE_CD_FLAG_NO_EJECT = (1 << 2),
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/* Drive is a pre ATAPI 1.2 drive. */
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IDE_CD_FLAG_PRE_ATAPI12 = (1 << 3),
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/* TOC addresses are in BCD. */
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IDE_CD_FLAG_TOCADDR_AS_BCD = (1 << 4),
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/* TOC track numbers are in BCD. */
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IDE_CD_FLAG_TOCTRACKS_AS_BCD = (1 << 5),
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/*
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* Drive does not provide data in multiples of SECTOR_SIZE
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* when more than one interrupt is needed.
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*/
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IDE_CD_FLAG_LIMIT_NFRAMES = (1 << 6),
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/* Seeking in progress. */
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IDE_CD_FLAG_SEEKING = (1 << 7),
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/* Driver has noticed a media change. */
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IDE_CD_FLAG_MEDIA_CHANGED = (1 << 8),
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/* Saved TOC information is current. */
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IDE_CD_FLAG_TOC_VALID = (1 << 9),
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/* We think that the drive door is locked. */
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IDE_CD_FLAG_DOOR_LOCKED = (1 << 10),
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/* SET_CD_SPEED command is unsupported. */
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IDE_CD_FLAG_NO_SPEED_SELECT = (1 << 11),
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IDE_CD_FLAG_VERTOS_300_SSD = (1 << 12),
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IDE_CD_FLAG_VERTOS_600_ESD = (1 << 13),
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IDE_CD_FLAG_SANYO_3CD = (1 << 14),
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IDE_CD_FLAG_FULL_CAPS_PAGE = (1 << 15),
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IDE_CD_FLAG_PLAY_AUDIO_OK = (1 << 16),
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IDE_CD_FLAG_LE_SPEED_FIELDS = (1 << 17),
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};
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/* Structure of a MSF cdrom address. */
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struct atapi_msf {
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byte reserved;
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byte minute;
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byte second;
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byte frame;
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};
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/* Space to hold the disk TOC. */
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#define MAX_TRACKS 99
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struct atapi_toc_header {
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unsigned short toc_length;
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byte first_track;
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byte last_track;
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};
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struct atapi_toc_entry {
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byte reserved1;
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#if defined(__BIG_ENDIAN_BITFIELD)
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__u8 adr : 4;
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__u8 control : 4;
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#elif defined(__LITTLE_ENDIAN_BITFIELD)
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__u8 control : 4;
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__u8 adr : 4;
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#else
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#error "Please fix <asm/byteorder.h>"
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#endif
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byte track;
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byte reserved2;
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union {
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unsigned lba;
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struct atapi_msf msf;
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} addr;
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};
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struct atapi_toc {
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int last_session_lba;
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int xa_flag;
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unsigned long capacity;
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struct atapi_toc_header hdr;
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struct atapi_toc_entry ent[MAX_TRACKS+1];
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/* One extra for the leadout. */
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};
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/* Extra per-device info for cdrom drives. */
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struct cdrom_info {
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ide_drive_t *drive;
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ide_driver_t *driver;
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struct gendisk *disk;
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struct kref kref;
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/* Buffer for table of contents. NULL if we haven't allocated
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a TOC buffer for this device yet. */
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struct atapi_toc *toc;
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/* The result of the last successful request sense command
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on this device. */
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struct request_sense sense_data;
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struct request request_sense_request;
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int dma;
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unsigned long last_block;
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unsigned long start_seek;
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unsigned int cd_flags;
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u8 max_speed; /* Max speed of the drive. */
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u8 current_speed; /* Current speed of the drive. */
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/* Per-device info needed by cdrom.c generic driver. */
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struct cdrom_device_info devinfo;
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unsigned long write_timeout;
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};
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/* ide-cd_verbose.c */
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void ide_cd_log_error(const char *, struct request *, struct request_sense *);
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/* ide-cd.c functions used by ide-cd_ioctl.c */
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void ide_cd_init_rq(ide_drive_t *, struct request *);
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int ide_cd_queue_pc(ide_drive_t *, struct request *);
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int ide_cd_read_toc(ide_drive_t *, struct request_sense *);
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int ide_cdrom_get_capabilities(ide_drive_t *, u8 *);
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void ide_cdrom_update_speed(ide_drive_t *, u8 *);
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int cdrom_check_status(ide_drive_t *, struct request_sense *);
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/* ide-cd_ioctl.c */
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int ide_cdrom_open_real(struct cdrom_device_info *, int);
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void ide_cdrom_release_real(struct cdrom_device_info *);
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int ide_cdrom_drive_status(struct cdrom_device_info *, int);
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int ide_cdrom_check_media_change_real(struct cdrom_device_info *, int);
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int ide_cdrom_tray_move(struct cdrom_device_info *, int);
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int ide_cdrom_lock_door(struct cdrom_device_info *, int);
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int ide_cdrom_select_speed(struct cdrom_device_info *, int);
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int ide_cdrom_get_last_session(struct cdrom_device_info *,
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struct cdrom_multisession *);
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int ide_cdrom_get_mcn(struct cdrom_device_info *, struct cdrom_mcn *);
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int ide_cdrom_reset(struct cdrom_device_info *cdi);
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int ide_cdrom_audio_ioctl(struct cdrom_device_info *, unsigned int, void *);
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int ide_cdrom_packet(struct cdrom_device_info *, struct packet_command *);
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#endif /* _IDE_CD_H */
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