c4217f94eb
The atapi subsystem has gotten better error handeling and timeouts, it also tries a REQUEST SENSE command when devices returns errors, to give a little more info as to what went wrong. It might be a little verbose for now, but I'm interested in as much feedback on errors as possible, especially timeouts, as I'm a bit in doubt if I've chosen resonable default values everywhere. The disk driver has been changed a bit to prepare for tagged queing, which is next on my list. The disk driver has grown a dump routine, I got one implementation from Darrell Anderson <anderson@cs.duke.edu> which also did partial dumps (usefull on big memory machines) I left out the partial stuff for now, and changed the rest alot to fit into the new ad_request framework. Some minor cleanups and rearrangements as well. As usual USE AT YOUR OWN RISK!!, this is still pre alpha level code. Especially the DMA support can hose your disk real bad if anything goes wrong, again you have been warned :) Notebook owners should be carefull that their machines dont suspend as this might cause trouble... But please tell me how it works for you! Enjoy! -Søren
94 lines
4.2 KiB
C
94 lines
4.2 KiB
C
/*-
|
|
* Copyright (c) 1998,1999 Søren Schmidt
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer,
|
|
* without modification, immediately at the beginning of the file.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. The name of the author may not be used to endorse or promote products
|
|
* derived from this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
|
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
|
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
|
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
|
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
|
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*
|
|
* $Id: atapi-tape.h,v 1.3 1999/03/07 21:49:14 sos Exp $
|
|
*/
|
|
|
|
/* MODE SENSE parameter header */
|
|
struct ast_header {
|
|
u_int8_t data_length; /* total length of data */
|
|
u_int8_t medium_type; /* medium type (if any) */
|
|
u_int8_t dsp; /* device specific parameter */
|
|
u_int8_t bdl; /* block Descriptor Length */
|
|
};
|
|
|
|
/* ATAPI tape drive Capabilities and Mechanical Status Page */
|
|
#define ATAPI_TAPE_CAP_PAGE 0x2a
|
|
|
|
struct ast_cappage {
|
|
u_int8_t page_code :6; /* page code == 0x2a */
|
|
u_int8_t reserved1_67 :2;
|
|
u_int8_t page_length; /* page Length == 0x12 */
|
|
u_int8_t reserved2;
|
|
u_int8_t reserved3;
|
|
u_int8_t readonly :1; /* read Only Mode */
|
|
u_int8_t reserved4_1234 :4;
|
|
u_int8_t reverse :1; /* supports reverse direction */
|
|
u_int8_t reserved4_67 :2;
|
|
u_int8_t reserved5_012 :3;
|
|
u_int8_t eformat :1; /* supports ERASE formatting */
|
|
u_int8_t reserved5_4 :1;
|
|
u_int8_t qfa :1; /* supports QFA formats */
|
|
u_int8_t reserved5_67 :2;
|
|
u_int8_t lock :1; /* supports locking media */
|
|
u_int8_t locked :1; /* the media is locked */
|
|
u_int8_t prevent :1; /* defaults to prevent state */
|
|
u_int8_t eject :1; /* supports eject */
|
|
u_int8_t disconnect :1; /* can break request > ctl */
|
|
u_int8_t reserved6_5 :1;
|
|
u_int8_t ecc :1; /* supports error correction */
|
|
u_int8_t compress :1; /* supports data compression */
|
|
u_int8_t reserved7_0 :1;
|
|
u_int8_t blk512 :1; /* supports 512b block size */
|
|
u_int8_t blk1024 :1; /* supports 1024b block size */
|
|
u_int8_t reserved7_3456 :4;
|
|
u_int8_t slowb :1; /* restricts byte count */
|
|
u_int16_t max_speed; /* supported speed in KBps */
|
|
u_int16_t max_defects; /* max stored defect entries */
|
|
u_int16_t ctl; /* continuous transfer limit */
|
|
u_int16_t speed; /* current Speed, in KBps */
|
|
u_int16_t buffer_size; /* buffer Size, in 512 bytes */
|
|
u_int8_t reserved18;
|
|
u_int8_t reserved19;
|
|
};
|
|
|
|
struct ast_softc {
|
|
struct atapi_softc *atp; /* controller structure */
|
|
int32_t lun; /* logical device unit */
|
|
int32_t flags; /* device state flags */
|
|
int32_t blksize; /* block size (512 | 1024) */
|
|
struct buf_queue_head buf_queue; /* queue of i/o requests */
|
|
struct atapi_params *param; /* drive parameters table */
|
|
struct ast_header header; /* MODE SENSE param header */
|
|
struct ast_cappage cap; /* capabilities page info */
|
|
struct devstat stats; /* devstat entry */
|
|
#ifdef DEVFS
|
|
void *cdevs_token;
|
|
void *bdevs_token;
|
|
#endif
|
|
};
|