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Commit 8303b46e authored by Borislav Petkov's avatar Borislav Petkov Committed by Bartlomiej Zolnierkiewicz
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ide: add generic packet command representation ide_atapi_pc 



This new struct unifies ide{-floppy,-tape,-scsi}'s view of a packet command. For now,
it represents the common denominator between the three drivers while adding driver-
specific members at the end of the struct which will be merged/simplified into the
generic ATAPI handling code in later steps, or removed completely.

Bart:
- move struct ide_atapi_pc outside of #ifdef/#endif CONFIG_IDE_PROC_FS

Signed-off-by: default avatarBorislav Petkov <petkovbb@gmail.com>
Signed-off-by: default avatarBartlomiej Zolnierkiewicz <bzolnier@gmail.com>
parent 346331f8

include/linux/ide.h

+47 −0
Original line number Diff line number Diff line
@@ -595,6 +595,53 @@ int set_io_32bit(ide_drive_t *, int); 
int set_pio_mode(ide_drive_t *, int);

int set_using_dma(ide_drive_t *, int);



struct ide_atapi_pc {

	/* actual packet bytes */

	u8 c[12];

	/* incremented on each retry */

	int retries;

	int error;



	/* bytes to transfer */

	int req_xfer;

	/* bytes actually transferred */

	int xferred;



	/* data buffer */

	u8 *buf;

	/* current buffer position */

	u8 *cur_pos;

	int buf_size;

	/* missing/available data on the current buffer */

	int b_count;



	/* the corresponding request */

	struct request *rq;



	unsigned long flags;



	/*

	 * those are more or less driver-specific and some of them are subject

	 * to change/removal later.

	 */

	u8 pc_buf[256];

	void (*idefloppy_callback) (ide_drive_t *);

	ide_startstop_t (*idetape_callback) (ide_drive_t *);



	/* idetape only */

	struct idetape_bh *bh;

	char *b_data;



	/* idescsi only for now */

	struct scatterlist *sg;

	unsigned int sg_cnt;



	struct scsi_cmnd *scsi_cmd;

	void (*done) (struct scsi_cmnd *);



	unsigned long timeout;

};



#ifdef CONFIG_IDE_PROC_FS

/*

 * configurable drive settings