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524 lines
12 KiB
C
524 lines
12 KiB
C
/*
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* Written by grefen@?????
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* Based on scsi drivers by Julian Elischer (julian@tfs.com)
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*
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* $Id: ch.c,v 1.9 1994/10/19 00:09:44 wollman Exp $
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*/
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#include <sys/types.h>
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#include <ch.h>
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/errno.h>
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#include <sys/ioctl.h>
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#include <sys/buf.h>
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#include <sys/proc.h>
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#include <sys/user.h>
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#include <sys/chio.h>
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#include <sys/malloc.h>
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#include <scsi/scsi_all.h>
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#include <scsi/scsi_changer.h>
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#include <scsi/scsiconf.h>
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#include <sys/devconf.h>
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static errval ch_mode_sense(u_int32, u_int32);
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struct scsi_xfer ch_scsi_xfer[NCH];
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u_int32 ch_xfer_block_wait[NCH];
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#define PAGESIZ 4096
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#define STQSIZE 4
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#define CHRETRIES 2
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#define MODE(z) ( (minor(z) & 0x0F) )
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#define UNIT(z) ( (minor(z) >> 4) )
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#define ESUCCESS 0
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errval chattach();
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/*
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* This driver is so simple it uses all the default services
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*/
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struct scsi_device ch_switch =
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{
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NULL,
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NULL,
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NULL,
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NULL,
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"ch",
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0,
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0, 0
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};
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struct ch_data {
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u_int32 flags;
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struct scsi_link *sc_link; /* all the inter level info */
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u_int16 chmo; /* Offset of first CHM */
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u_int16 chms; /* No. of CHM */
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u_int16 slots; /* No. of Storage Elements */
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u_int16 sloto; /* Offset of first SE */
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u_int16 imexs; /* No. of Import/Export Slots */
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u_int16 imexo; /* Offset of first IM/EX */
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u_int16 drives; /* No. of CTS */
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u_int16 driveo; /* Offset of first CTS */
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u_int16 rot; /* CHM can rotate */
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u_long op_matrix; /* possible opertaions */
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u_int16 lsterr; /* details of lasterror */
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u_char stor; /* posible Storage locations */
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u_int32 initialized;
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} ch_data[NCH];
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#define CH_OPEN 0x01
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#define CH_KNOWN 0x02
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static u_int32 next_ch_unit = 0;
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static int
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ch_goaway(struct kern_devconf *kdc, int force) /* XXX should do a lot more */
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{
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dev_detach(kdc);
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FREE(kdc, M_TEMP);
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return 0;
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}
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static int
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ch_externalize(struct proc *p, struct kern_devconf *kdc, void *userp,
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size_t len)
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{
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return scsi_externalize(ch_data[kdc->kdc_unit].sc_link, userp, &len);
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}
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static struct kern_devconf kdc_ch_template = {
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0, 0, 0, /* filled in by dev_attach */
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"ch", 0, { "scsi", MDDT_SCSI, 0 },
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ch_externalize, 0, ch_goaway, SCSI_EXTERNALLEN
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};
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static inline void
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ch_registerdev(int unit)
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{
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struct kern_devconf *kdc;
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MALLOC(kdc, struct kern_devconf *, sizeof *kdc, M_TEMP, M_NOWAIT);
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if(!kdc) return;
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*kdc = kdc_ch_template;
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kdc->kdc_unit = unit;
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dev_attach(kdc);
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}
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/*
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* The routine called by the low level scsi routine when it discovers
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* a device suitable for this driver.
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*/
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errval
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chattach(sc_link)
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struct scsi_link *sc_link;
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{
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u_int32 unit, i, stat;
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unsigned char *tbl;
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SC_DEBUG(sc_link, SDEV_DB2, ("chattach: "));
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/*
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* Check we have the resources for another drive
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*/
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unit = next_ch_unit++;
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if (unit >= NCH) {
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printf("Too many scsi changers..(%d > %d) reconfigure kernel\n", (unit + 1), NCH);
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return (0);
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}
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/*
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* Store information needed to contact our base driver
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*/
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ch_data[unit].sc_link = sc_link;
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sc_link->device = &ch_switch;
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sc_link->dev_unit = unit;
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/*
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* Use the subdriver to request information regarding
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* the drive. We cannot use interrupts yet, so the
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* request must specify this.
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*/
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if ((ch_mode_sense(unit, SCSI_NOSLEEP | SCSI_NOMASK /*| SCSI_SILENT */ ))) {
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printf("ch%d: scsi changer :- offline\n", unit);
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stat = CH_OPEN;
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} else {
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printf("ch%d: scsi changer, %d slot(s) %d drive(s) %d arm(s) %d i/e-slot(s)\n",
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unit, ch_data[unit].slots, ch_data[unit].drives, ch_data[unit].chms, ch_data[unit].imexs);
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stat = CH_KNOWN;
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}
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ch_data[unit].initialized = 1;
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ch_registerdev(unit);
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return 1;
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/* XXX ??? is this the right return val? */
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}
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/*
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* open the device.
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*/
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errval
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chopen(dev)
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dev_t dev;
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{
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errval errcode = 0;
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u_int32 unit, mode;
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struct scsi_link *sc_link;
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unit = UNIT(dev);
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mode = MODE(dev);
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/*
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* Check the unit is legal
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*/
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if (unit >= NCH) {
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printf("ch%d: ch %d > %d\n", unit, unit, NCH);
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errcode = ENXIO;
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return (errcode);
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}
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/*
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* Only allow one at a time
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*/
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if (ch_data[unit].flags & CH_OPEN) {
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printf("ch%d: already open\n", unit);
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return EBUSY;
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}
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/*
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* Make sure the device has been initialised
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*/
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if (!ch_data[unit].initialized)
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return (ENXIO);
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sc_link = ch_data[unit].sc_link;
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SC_DEBUG(sc_link, SDEV_DB1, ("chopen: dev=0x%x (unit %d (of %d))\n"
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,dev, unit, NCH));
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/*
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* Catch any unit attention errors.
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*/
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scsi_test_unit_ready(sc_link, SCSI_SILENT);
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sc_link->flags |= SDEV_OPEN;
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/*
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* Check that it is still responding and ok.
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*/
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if (errcode = (scsi_test_unit_ready(sc_link, 0))) {
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printf("ch%d: not ready\n", unit);
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sc_link->flags &= ~SDEV_OPEN;
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return errcode;
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}
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/*
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* Make sure data is loaded
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*/
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if (errcode = (ch_mode_sense(unit, SCSI_NOSLEEP | SCSI_NOMASK))) {
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printf("ch%d: scsi changer :- offline\n", unit);
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sc_link->flags &= ~SDEV_OPEN;
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return (errcode);
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}
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ch_data[unit].flags = CH_OPEN;
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return 0;
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}
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/*
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* close the device.. only called if we are the LAST
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* occurence of an open device
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*/
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errval
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chclose(dev)
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dev_t dev;
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{
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unsigned char unit, mode;
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struct scsi_link *sc_link;
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unit = UNIT(dev);
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mode = MODE(dev);
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sc_link = ch_data[unit].sc_link;
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SC_DEBUG(sc_link, SDEV_DB1, ("Closing device"));
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ch_data[unit].flags = 0;
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sc_link->flags &= ~SDEV_OPEN;
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return (0);
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}
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/*
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* Perform special action on behalf of the user
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* Knows about the internals of this device
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*/
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errval
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chioctl(dev, cmd, arg, mode)
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dev_t dev;
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u_int32 cmd;
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caddr_t arg;
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int mode;
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{
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/* struct ch_cmd_buf *args; */
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union scsi_cmd *scsi_cmd;
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register i, j;
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u_int32 opri;
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errval errcode = 0;
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unsigned char unit;
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u_int32 number, flags;
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errval ret;
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struct scsi_link *sc_link;
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/*
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* Find the device that the user is talking about
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*/
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flags = 0; /* give error messages, act on errors etc. */
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unit = UNIT(dev);
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sc_link = ch_data[unit].sc_link;
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switch ((int)cmd) {
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case CHIOOP:{
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struct chop *ch = (struct chop *) arg;
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SC_DEBUG(sc_link, SDEV_DB2,
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("[chtape_chop: %x]\n", ch->ch_op));
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switch ((short) (ch->ch_op)) {
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case CHGETPARAM:
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ch->u.getparam.chmo = ch_data[unit].chmo;
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ch->u.getparam.chms = ch_data[unit].chms;
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ch->u.getparam.sloto = ch_data[unit].sloto;
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ch->u.getparam.slots = ch_data[unit].slots;
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ch->u.getparam.imexo = ch_data[unit].imexo;
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ch->u.getparam.imexs = ch_data[unit].imexs;
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ch->u.getparam.driveo = ch_data[unit].driveo;
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ch->u.getparam.drives = ch_data[unit].drives;
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ch->u.getparam.rot = ch_data[unit].rot;
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ch->result = 0;
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return 0;
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break;
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case CHPOSITION:
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return ch_position(unit, &ch->result, ch->u.position.chm,
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ch->u.position.to,
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flags);
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case CHMOVE:
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return ch_move(unit, &ch->result, ch->u.position.chm,
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ch->u.move.from, ch->u.move.to,
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flags);
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case CHGETELEM:
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return ch_getelem(unit, &ch->result, ch->u.get_elem_stat.type,
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ch->u.get_elem_stat.from, &ch->u.get_elem_stat.elem_data,
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flags);
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default:
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return EINVAL;
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}
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}
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default:
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return scsi_do_ioctl(sc_link, cmd, arg, mode);
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}
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return (ret ? ESUCCESS : EIO);
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}
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errval
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ch_getelem(unit, stat, type, from, data, flags)
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u_int32 unit, from, flags;
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int type;
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short *stat;
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char *data;
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{
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struct scsi_read_element_status scsi_cmd;
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char elbuf[32];
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errval ret;
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bzero(&scsi_cmd, sizeof(scsi_cmd));
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scsi_cmd.op_code = READ_ELEMENT_STATUS;
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scsi_cmd.byte2 = type;
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scsi_cmd.starting_element_addr[0] = (from >> 8) & 0xff;
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scsi_cmd.starting_element_addr[1] = from & 0xff;
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scsi_cmd.number_of_elements[1] = 1;
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scsi_cmd.allocation_length[2] = 32;
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if ((ret = scsi_scsi_cmd(ch_data[unit].sc_link,
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(struct scsi_generic *) &scsi_cmd,
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sizeof(scsi_cmd),
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(u_char *) elbuf,
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32,
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CHRETRIES,
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100000,
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NULL,
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SCSI_DATA_IN | flags) != ESUCCESS)) {
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*stat = ch_data[unit].lsterr;
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bcopy(elbuf + 16, data, 16);
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return ret;
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}
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bcopy(elbuf + 16, data, 16); /*Just a hack sh */
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return ret;
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}
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errval
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ch_move(unit, stat, chm, from, to, flags)
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u_int32 unit, chm, from, to, flags;
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short *stat;
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{
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struct scsi_move_medium scsi_cmd;
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errval ret;
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bzero(&scsi_cmd, sizeof(scsi_cmd));
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scsi_cmd.op_code = MOVE_MEDIUM;
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scsi_cmd.transport_element_address[0] = (chm >> 8) & 0xff;
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scsi_cmd.transport_element_address[1] = chm & 0xff;
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scsi_cmd.source_address[0] = (from >> 8) & 0xff;
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scsi_cmd.source_address[1] = from & 0xff;
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scsi_cmd.destination_address[0] = (to >> 8) & 0xff;
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scsi_cmd.destination_address[1] = to & 0xff;
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scsi_cmd.invert = (chm & CH_INVERT) ? 1 : 0;
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if ((ret = scsi_scsi_cmd(ch_data[unit].sc_link,
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(struct scsi_generic *) &scsi_cmd,
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sizeof(scsi_cmd),
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NULL,
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0,
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CHRETRIES,
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100000,
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NULL,
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flags) != ESUCCESS)) {
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*stat = ch_data[unit].lsterr;
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return ret;
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}
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return ret;
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}
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errval
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ch_position(unit, stat, chm, to, flags)
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u_int32 unit, chm, to, flags;
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short *stat;
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{
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struct scsi_position_to_element scsi_cmd;
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errval ret;
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bzero(&scsi_cmd, sizeof(scsi_cmd));
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scsi_cmd.op_code = POSITION_TO_ELEMENT;
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scsi_cmd.transport_element_address[0] = (chm >> 8) & 0xff;
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scsi_cmd.transport_element_address[1] = chm & 0xff;
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scsi_cmd.source_address[0] = (to >> 8) & 0xff;
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scsi_cmd.source_address[1] = to & 0xff;
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scsi_cmd.invert = (chm & CH_INVERT) ? 1 : 0;
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if ((ret = scsi_scsi_cmd(ch_data[unit].sc_link,
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(struct scsi_generic *) &scsi_cmd,
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sizeof(scsi_cmd),
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NULL,
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0,
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CHRETRIES,
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100000,
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NULL,
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flags) != ESUCCESS)) {
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*stat = ch_data[unit].lsterr;
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return ret;
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}
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return ret;
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}
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#ifdef __STDC__
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#define b2tol(a) (((unsigned)(a##_1) << 8) + (unsigned)a##_0 )
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#else
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#define b2tol(a) (((unsigned)(a/**/_1) << 8) + (unsigned)a/**/_0 )
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#endif
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/*
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* Get the scsi driver to send a full inquiry to the
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* device and use the results to fill out the global
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* parameter structure.
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*/
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static errval
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ch_mode_sense(unit, flags)
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u_int32 unit, flags;
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{
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struct scsi_mode_sense scsi_cmd;
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u_char scsi_sense[128]; /* Can't use scsi_mode_sense_data because of
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* missing block descriptor
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*/
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u_char *b;
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int32 i, l;
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errval errcode;
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struct scsi_link *sc_link = ch_data[unit].sc_link;
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/*
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* First check if we have it all loaded
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*/
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if (sc_link->flags & SDEV_MEDIA_LOADED)
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return 0;
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/*
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* First do a mode sense
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*/
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/* sc_link->flags &= ~SDEV_MEDIA_LOADED; *//*XXX */
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bzero(&scsi_cmd, sizeof(scsi_cmd));
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scsi_cmd.op_code = MODE_SENSE;
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scsi_cmd.byte2 = SMS_DBD;
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scsi_cmd.page = 0x3f; /* All Pages */
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scsi_cmd.length = sizeof(scsi_sense);
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/*
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* Read in the pages
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*/
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if (errcode = scsi_scsi_cmd(sc_link,
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(struct scsi_generic *) &scsi_cmd,
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sizeof(struct scsi_mode_sense),
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(u_char *) & scsi_sense,
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sizeof (scsi_sense),
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CHRETRIES,
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5000,
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NULL,
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flags | SCSI_DATA_IN) != 0) {
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if (!(flags & SCSI_SILENT))
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printf("ch%d: could not mode sense\n", unit);
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return (errcode);
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}
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sc_link->flags |= SDEV_MEDIA_LOADED;
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l = scsi_sense[0] - 3;
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b = &scsi_sense[4];
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/*
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* To avoid alignment problems
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*/
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/* XXX - FIX THIS FOR MSB */
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#define p2copy(valp) (valp[1]+ (valp[0]<<8));valp+=2
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#define p4copy(valp) (valp[3]+ (valp[2]<<8) + (valp[1]<<16) + (valp[0]<<24));valp+=4
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#if 0
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printf("\nmode_sense %d\n", l);
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for (i = 0; i < l + 4; i++) {
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printf("%x%c", scsi_sense[i], i % 8 == 7 ? '\n' : ':');
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} printf("\n");
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#endif
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for (i = 0; i < l;) {
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u_int32 pc = (*b++) & 0x3f;
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u_int32 pl = *b++;
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u_char *bb = b;
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switch ((int)pc) {
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case 0x1d:
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ch_data[unit].chmo = p2copy(bb);
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ch_data[unit].chms = p2copy(bb);
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ch_data[unit].sloto = p2copy(bb);
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ch_data[unit].slots = p2copy(bb);
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ch_data[unit].imexo = p2copy(bb);
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ch_data[unit].imexs = p2copy(bb);
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ch_data[unit].driveo = p2copy(bb);
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ch_data[unit].drives = p2copy(bb);
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break;
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case 0x1e:
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ch_data[unit].rot = (*b) & 1;
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break;
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case 0x1f:
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ch_data[unit].stor = *b & 0xf;
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bb += 2;
|
|
ch_data[unit].stor = p4copy(bb);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
b += pl;
|
|
i += pl + 2;
|
|
}
|
|
SC_DEBUG(sc_link, SDEV_DB2,
|
|
(" cht(%d-%d)slot(%d-%d)imex(%d-%d)cts(%d-%d) %s rotate\n",
|
|
ch_data[unit].chmo, ch_data[unit].chms,
|
|
ch_data[unit].sloto, ch_data[unit].slots,
|
|
ch_data[unit].imexo, ch_data[unit].imexs,
|
|
ch_data[unit].driveo, ch_data[unit].drives,
|
|
ch_data[unit].rot ? "can" : "can't"));
|
|
return (0);
|
|
}
|