1823d8fdf6
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
526 lines
15 KiB
C
526 lines
15 KiB
C
/*-
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* Copyright (c) 1998,1999 Søren Schmidt
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer,
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* without modification, immediately at the beginning of the file.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $Id: atapi-tape.c,v 1.10 1999/05/31 11:24:30 phk Exp $
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*/
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#include "ata.h"
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#include "atapist.h"
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#include "opt_devfs.h"
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#if NATA > 0 && NATAPIST > 0
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/conf.h>
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#include <sys/malloc.h>
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#include <sys/buf.h>
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#include <sys/mtio.h>
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#include <sys/disklabel.h>
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#include <sys/devicestat.h>
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#ifdef DEVFS
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#include <sys/devfsext.h>
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#endif
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#include <machine/clock.h>
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#include <pci/pcivar.h>
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#include <dev/ata/ata-all.h>
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#include <dev/ata/atapi-all.h>
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#include <dev/ata/atapi-tape.h>
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static d_open_t astopen;
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static d_close_t astclose;
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static d_ioctl_t astioctl;
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static d_strategy_t aststrategy;
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static struct cdevsw ast_cdevsw = {
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/* open */ astopen,
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/* close */ astclose,
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/* read */ physread,
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/* write */ physwrite,
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/* ioctl */ astioctl,
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/* stop */ nostop,
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/* reset */ noreset,
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/* devtotty */ nodevtotty,
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/* poll */ nopoll,
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/* mmap */ nommap,
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/* strategy */ aststrategy,
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/* name */ "ast",
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/* parms */ noparms,
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/* maj */ 119,
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/* dump */ nodump,
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/* psize */ nopsize,
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/* flags */ D_TAPE,
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/* maxio */ 0,
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/* bmaj */ 33
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};
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static u_int32_t ast_total = 0;
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#define NUNIT 8
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#define UNIT(d) ((minor(d) >> 3) & 3)
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#define F_OPEN 0x0001 /* the device is opened */
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#define F_MEDIA_CHANGED 0x0002 /* the media have changed */
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#define F_DATA_WRITTEN 0x0004 /* data has been written */
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#define F_FM_WRITTEN 0x0008 /* filemark has been written */
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#define F_CTL_WARN 0x0010 /* have we warned about CTL wrong? */
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static struct ast_softc *asttab[NUNIT]; /* drive info by unit number */
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static int32_t astnlun = 0; /* number of config'd drives */
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int32_t astattach(struct atapi_softc *);
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static int32_t ast_sense(struct ast_softc *);
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static void ast_describe(struct ast_softc *);
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static void ast_start(struct ast_softc *);
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static void ast_done(struct atapi_request *);
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static void ast_drvinit(void *);
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static int32_t ast_space_cmd(struct ast_softc *, u_int8_t, u_int32_t);
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static int32_t ast_write_filemark(struct ast_softc *, u_int8_t);
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static int32_t ast_erase(struct ast_softc *);
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static int32_t ast_load_unload(struct ast_softc *, u_int8_t);
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static int32_t ast_rewind(struct ast_softc *);
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int32_t
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astattach(struct atapi_softc *atp)
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{
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struct ast_softc *stp;
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if (astnlun >= NUNIT) {
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printf("ast: too many units\n");
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return -1;
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}
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stp = malloc(sizeof(struct ast_softc), M_TEMP, M_NOWAIT);
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if (!stp) {
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printf("ast: out of memory\n");
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return -1;
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}
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bzero(stp, sizeof(struct ast_softc));
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bufq_init(&stp->buf_queue);
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stp->atp = atp;
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stp->lun = astnlun;
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stp->flags = F_MEDIA_CHANGED;
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if (ast_sense(stp)) {
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free(stp, M_TEMP);
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return -1;
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}
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ast_describe(stp);
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asttab[astnlun++] = stp;
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devstat_add_entry(&stp->stats, "ast", stp->lun, DEV_BSIZE,
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DEVSTAT_NO_ORDERED_TAGS,
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DEVSTAT_TYPE_SEQUENTIAL | DEVSTAT_TYPE_IF_IDE,
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0x170);
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#ifdef DEVFS
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stp->cdevs_token = devfs_add_devswf(&ast_cdevsw, dkmakeminor(stp->lun, 0,0),
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DV_CHR, UID_ROOT, GID_OPERATOR, 0640,
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"rast%d", stp->lun);
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#endif
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return 0;
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}
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static int32_t
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ast_sense(struct ast_softc *stp)
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{
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int32_t error, count;
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int8_t buffer[256];
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int8_t ccb[16] = { ATAPI_TAPE_MODE_SENSE,
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8, /* DBD = 1 no block descr */
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ATAPI_TAPE_CAP_PAGE,
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sizeof(buffer)>>8, sizeof(buffer) & 0xff,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
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bzero(buffer, sizeof(buffer));
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/* get drive capabilities, some drives needs this repeated */
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for (count = 0 ; count < 5 ; count++) {
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if (!(error = atapi_queue_cmd(stp->atp, ccb, buffer, sizeof(buffer),
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A_READ, 30, NULL, NULL, NULL)))
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break;
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}
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#ifdef AST_DEBUG
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atapi_dump("ast: sense", buffer, sizeof(buffer));
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#endif
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if (error)
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return error;
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bcopy(buffer, &stp->header, sizeof(struct ast_header));
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bcopy(buffer+sizeof(struct ast_header), &stp->cap,
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sizeof(struct ast_cappage));
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if (stp->cap.page_code != ATAPI_TAPE_CAP_PAGE)
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return 1;
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stp->cap.max_speed = ntohs(stp->cap.max_speed);
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stp->cap.max_defects = ntohs(stp->cap.max_defects);
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stp->cap.ctl = ntohs(stp->cap.ctl);
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stp->cap.speed = ntohs(stp->cap.speed);
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stp->cap.buffer_size = ntohs(stp->cap.buffer_size);
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stp->blksize = (stp->cap.blk512 ? 512 : (stp->cap.blk1024 ? 1024 : 0));
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return 0;
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}
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static void
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ast_describe(struct ast_softc *stp)
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{
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int8_t model_buf[40+1];
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int8_t revision_buf[8+1];
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bpack(stp->atp->atapi_parm->model, model_buf, sizeof(model_buf));
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bpack(stp->atp->atapi_parm->revision, revision_buf, sizeof(revision_buf));
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printf("ast%d: <%s/%s> tape drive at ata%d as %s\n",
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stp->lun, model_buf, revision_buf,
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stp->atp->controller->lun,
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(stp->atp->unit == ATA_MASTER) ? "master" : "slave ");
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printf("ast%d: ", stp->lun);
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switch (stp->header.medium_type) {
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case 0x00: printf("Drive empty"); break;
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case 0x17: printf("Travan 1 (400 Mbyte) media"); break;
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case 0xb6: printf("Travan 4 (4 Gbyte) media"); break;
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default: printf("Unknown media (0x%x)", stp->header.medium_type);
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}
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if (stp->cap.readonly) printf(", readonly");
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if (stp->cap.reverse) printf(", reverse");
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if (stp->cap.eformat) printf(", eformat");
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if (stp->cap.qfa) printf(", qfa");
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if (stp->cap.lock) printf(", lock");
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if (stp->cap.locked) printf(", locked");
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if (stp->cap.prevent) printf(", prevent");
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if (stp->cap.eject) printf(", eject");
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if (stp->cap.disconnect) printf(", disconnect");
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if (stp->cap.ecc) printf(", ecc");
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if (stp->cap.compress) printf(", compress");
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if (stp->cap.blk512) printf(", 512b");
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if (stp->cap.blk1024) printf(", 1024b");
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if (stp->cap.slowb) printf(", slowb");
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printf("\nast%d: ", stp->lun);
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printf("Max speed=%dKb/s, ", stp->cap.max_speed);
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printf("Transfer limit=%d blocks, ", stp->cap.ctl);
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printf("Buffer size=%d blocks", stp->cap.buffer_size);
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printf("\n");
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}
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static int
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astopen(dev_t dev, int32_t flags, int32_t fmt, struct proc *p)
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{
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int32_t lun = UNIT(dev);
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struct ast_softc *stp;
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if (lun >= astnlun || !(stp = asttab[lun]))
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return ENXIO;
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if (stp->flags == F_OPEN)
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return EBUSY;
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if (ast_sense(stp))
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printf("ast%d: sense media type failed\n", stp->lun);
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stp->flags &= ~F_MEDIA_CHANGED;
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stp->flags &= ~(F_DATA_WRITTEN | F_FM_WRITTEN);
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stp->flags |= F_OPEN;
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ast_total = 0;
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return 0;
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}
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static int
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astclose(dev_t dev, int32_t flags, int32_t fmt, struct proc *p)
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{
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int32_t lun = UNIT(dev);
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struct ast_softc *stp;
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if (lun >= astnlun || !(stp = asttab[lun]))
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return ENXIO;
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/* flush buffers, some drives fail here, but they should report ctl = 0 */
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if (stp->cap.ctl && (stp->flags & F_DATA_WRITTEN))
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ast_write_filemark(stp, 0);
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/* write filemark if data written to tape */
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if ((stp->flags & (F_DATA_WRITTEN | F_FM_WRITTEN)) == F_DATA_WRITTEN)
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ast_write_filemark(stp, WEOF_WRITE_MASK);
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/* if minor is even rewind on close */
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if (!(minor(dev) & 0x01))
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ast_rewind(stp);
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stp->flags &= ~F_OPEN;
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#ifdef AST_DEBUG
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printf("ast%d: %ud total bytes transferred\n", stp->lun, ast_total);
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#endif
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stp->flags &= ~F_CTL_WARN;
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return 0;
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}
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static int
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astioctl(dev_t dev, u_long cmd, caddr_t addr, int32_t flag, struct proc *p)
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{
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int32_t lun = UNIT(dev);
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int32_t error = 0;
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struct ast_softc *stp;
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if (lun >= astnlun || !(stp = asttab[lun]))
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return ENXIO;
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switch (cmd) {
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case MTIOCGET:
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{
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struct mtget *g = (struct mtget *) addr;
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bzero(g, sizeof(struct mtget));
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g->mt_type = 7;
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g->mt_density = 1;
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g->mt_blksiz = stp->blksize;
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g->mt_comp = stp->cap.compress;
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g->mt_density0 = 0; g->mt_density1 = 0;
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g->mt_density2 = 0; g->mt_density3 = 0;
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g->mt_blksiz0 = 0; g->mt_blksiz1 = 0;
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g->mt_blksiz2 = 0; g->mt_blksiz3 = 0;
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g->mt_comp0 = 0; g->mt_comp1 = 0;
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g->mt_comp2 = 0; g->mt_comp3 = 0;
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break;
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}
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case MTIOCTOP:
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{
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int32_t i;
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struct mtop *mt = (struct mtop *)addr;
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switch ((int16_t) (mt->mt_op)) {
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case MTWEOF:
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for (i=0; i < mt->mt_count && !error; i++)
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error = ast_write_filemark(stp, WEOF_WRITE_MASK);
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break;
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case MTFSF:
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if (mt->mt_count)
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error = ast_space_cmd(stp, SP_FM, mt->mt_count);
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break;
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case MTBSF:
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if (mt->mt_count)
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error = ast_space_cmd(stp, SP_FM, -(mt->mt_count));
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break;
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case MTREW:
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error = ast_rewind(stp);
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break;
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case MTOFFL:
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if ((error = ast_rewind(stp)))
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break;
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error = ast_load_unload(stp, !LU_LOAD_MASK);
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break;
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case MTNOP:
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error = ast_write_filemark(stp, 0);
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break;
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case MTERASE:
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error = ast_erase(stp);
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break;
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case MTEOD:
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error = ast_space_cmd(stp, SP_EOD, 0);
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break;
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case MTRETENS:
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error = ast_load_unload(stp, LU_RETENSION_MASK|LU_LOAD_MASK);
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break;
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case MTFSR:
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case MTBSR:
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case MTCACHE:
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case MTNOCACHE:
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case MTSETBSIZ:
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case MTSETDNSTY:
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case MTCOMP:
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default:
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error = EINVAL;
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}
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return error;
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}
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default:
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error = ENOTTY;
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}
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return error;
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}
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static void
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aststrategy(struct buf *bp)
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{
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int32_t lun = UNIT(bp->b_dev);
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struct ast_softc *stp = asttab[lun];
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int32_t x;
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/* if it's a null transfer, return immediatly. */
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if (bp->b_bcount == 0) {
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bp->b_resid = 0;
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biodone(bp);
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return;
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}
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/* check for != blocksize requests */
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if (bp->b_bcount % stp->blksize) {
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printf("ast%d: bad request, must be multiple of %d\n",
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lun, stp->blksize);
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bp->b_error = EIO;
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bp->b_flags |= B_ERROR;
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biodone(bp);
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return;
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}
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/* warn about transfers bigger than the device suggests */
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if (bp->b_bcount > stp->blksize * stp->cap.ctl) {
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if ((stp->flags & F_CTL_WARN) == 0) {
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printf("ast%d: WARNING: CTL exceeded %ld>%d\n",
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lun, bp->b_bcount, stp->blksize * stp->cap.ctl);
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stp->flags |= F_CTL_WARN;
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}
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}
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x = splbio();
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ast_total += bp->b_bcount;
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bufq_insert_tail(&stp->buf_queue, bp);
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ast_start(stp);
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splx(x);
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}
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static void
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ast_start(struct ast_softc *stp)
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{
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struct buf *bp = bufq_first(&stp->buf_queue);
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u_int32_t blkcount;
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int8_t ccb[16];
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if (!bp)
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return;
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bzero(ccb, sizeof(ccb));
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bufq_remove(&stp->buf_queue, bp);
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blkcount = bp->b_bcount / stp->blksize;
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if (bp->b_flags & B_READ) {
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ccb[0] = ATAPI_TAPE_READ_CMD;
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} else {
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ccb[0] = ATAPI_TAPE_WRITE_CMD;
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stp->flags |= F_DATA_WRITTEN;
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}
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ccb[1] = 1;
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ccb[2] = blkcount>>16;
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ccb[3] = blkcount>>8;
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ccb[4] = blkcount;
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devstat_start_transaction(&stp->stats);
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atapi_queue_cmd(stp->atp, ccb, bp->b_data, bp->b_bcount,
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(bp->b_flags & B_READ) ? A_READ : 0, 30, ast_done, stp, bp);
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}
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static void
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ast_done(struct atapi_request *request)
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{
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struct buf *bp = request->bp;
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struct ast_softc *stp = request->driver;
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devstat_end_transaction(&stp->stats, request->donecount,
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DEVSTAT_TAG_NONE,
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(bp->b_flags&B_READ) ? DEVSTAT_READ:DEVSTAT_WRITE);
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if (request->result) {
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bp->b_error = atapi_error(request->device, request->result);
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bp->b_flags |= B_ERROR;
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}
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else
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bp->b_resid = request->bytecount;
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biodone(bp);
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ast_start(stp);
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}
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static int32_t
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ast_space_cmd(struct ast_softc *stp, u_int8_t function, u_int32_t count)
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{
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int8_t ccb[16] = { ATAPI_TAPE_SPACE_CMD, function,
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count>>16, count>>8, count, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0 };
|
|
|
|
return atapi_queue_cmd(stp->atp, ccb, NULL, 0, 0, 60*60, NULL, NULL, NULL);
|
|
}
|
|
|
|
static int32_t
|
|
ast_write_filemark(struct ast_softc *stp, u_int8_t function)
|
|
{
|
|
int8_t ccb[16] = { ATAPI_TAPE_WEOF, 0, 0, 0, function, 0, 0, 0,
|
|
0, 0, 0, 0, 0, 0, 0, 0 };
|
|
|
|
if (function) {
|
|
if (stp->flags & F_FM_WRITTEN)
|
|
stp->flags &= ~F_DATA_WRITTEN;
|
|
else
|
|
stp->flags |= F_FM_WRITTEN;
|
|
}
|
|
return atapi_queue_cmd(stp->atp, ccb, NULL, 0, 0, 30, NULL, NULL, NULL);
|
|
}
|
|
|
|
static int32_t
|
|
ast_load_unload(struct ast_softc *stp, u_int8_t function)
|
|
{
|
|
int8_t ccb[16] = { ATAPI_TAPE_LOAD_UNLOAD, 0, 0, 0, function, 0, 0, 0,
|
|
0, 0, 0, 0, 0, 0, 0, 0 };
|
|
|
|
return atapi_queue_cmd(stp->atp, ccb, NULL, 0, 0, 30, NULL, NULL, NULL);
|
|
}
|
|
|
|
static int32_t
|
|
ast_erase(struct ast_softc *stp)
|
|
{
|
|
int32_t error;
|
|
int8_t ccb[16] = { ATAPI_TAPE_ERASE, 3, 0, 0, 0, 0, 0, 0,
|
|
0, 0, 0, 0, 0, 0, 0, 0 };
|
|
|
|
if ((error = ast_rewind(stp)))
|
|
return error;
|
|
|
|
return atapi_queue_cmd(stp->atp, ccb, NULL, 0, 0, 60*60, NULL, NULL, NULL);
|
|
}
|
|
|
|
static int32_t
|
|
ast_rewind(struct ast_softc *stp)
|
|
{
|
|
int8_t ccb[16] = { ATAPI_TAPE_REWIND, 0, 0, 0, 0, 0, 0, 0,
|
|
0, 0, 0, 0, 0, 0, 0, 0 };
|
|
|
|
return atapi_queue_cmd(stp->atp, ccb, NULL, 0, 0, 60*60, NULL, NULL, NULL);
|
|
}
|
|
|
|
static void
|
|
ast_drvinit(void *unused)
|
|
{
|
|
static int32_t ast_devsw_installed = 0;
|
|
|
|
if (!ast_devsw_installed) {
|
|
if (!ast_cdevsw.d_maxio)
|
|
ast_cdevsw.d_maxio = 254 * DEV_BSIZE;
|
|
cdevsw_add(&ast_cdevsw);
|
|
ast_devsw_installed = 1;
|
|
}
|
|
}
|
|
|
|
SYSINIT(astdev, SI_SUB_DRIVERS, SI_ORDER_MIDDLE, ast_drvinit, NULL)
|
|
#endif /* NATA & NATAPIST */
|