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/**** vi:set ts=8 sts=8 sw=8:************************************************
*
* Copyright (C) 2002 Marcin Dalecki <martin@dalecki.de>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published by
* the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*/
/*
* With each packet command, we allocate a buffer.
* This is used for several packet
* commands (Not for READ/WRITE commands).
*/
#define IDEFLOPPY_PC_BUFFER_SIZE 256
#define IDETAPE_PC_BUFFER_SIZE 256
/* This struct get's shared between different drivers.
*/
struct atapi_packet_command {
u8 c[12]; /* Actual packet bytes */
char *buffer; /* Data buffer */
int buffer_size; /* Size of our data buffer */
char *current_position; /* Pointer into the above buffer */
int request_transfer; /* Bytes to transfer */
int actually_transferred; /* Bytes actually transferred */
unsigned long flags; /* Status/Action bit flags: long for set_bit */
/* FIXME: the following is ugly as hell, but the only way we can start
* actually to unify the code.
*/
/* driver specific data. */
/* floppy/tape */
int retries; /* On each retry, we increment retries */
int error; /* Error code */
char *b_data; /* Pointer which runs on the buffers */
unsigned int b_count; /* Missing/Available data on the current buffer */
u8 pc_buffer[IDEFLOPPY_PC_BUFFER_SIZE]; /* Temporary buffer */
/* Called when this packet command is completed */
void (*callback) (struct ata_device *, struct request *);
/* only tape */
struct bio *bio;
/* only scsi */
struct {
unsigned int b_count; /* Bytes transferred from current entry */
struct scatterlist *sg; /* Scatter gather table */
struct scsi_cmnd *scsi_cmd; /* SCSI command */
void (*done)(struct scsi_cmnd *); /* Scsi completion routine */
unsigned long timeout; /* Command timeout */
} s;
};
extern void atapi_init_pc(struct atapi_packet_command *pc);
extern void atapi_discard_data(struct ata_device *, unsigned int);
extern void atapi_write_zeros(struct ata_device *, unsigned int);
extern void atapi_read(struct ata_device *, u8 *, unsigned int);
extern void atapi_write(struct ata_device *, u8 *, unsigned int);
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