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1275 |
phoenix |
/*
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* scsi_scan.c Copyright (C) 2000 Eric Youngdale
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*
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* Bus scan logic.
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*
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* This used to live in scsi.c, but that file was just a laundry basket
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* full of misc stuff. This got separated out in order to make things
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* clearer.
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*/
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#define __NO_VERSION__
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#include <linux/config.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/blk.h>
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#include "scsi.h"
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#include "hosts.h"
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#include "constants.h"
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#ifdef CONFIG_KMOD
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#include <linux/kmod.h>
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#endif
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/*
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* Flags for irregular SCSI devices that need special treatment
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*/
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#define BLIST_NOLUN 0x001 /* Don't scan for LUNs */
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#define BLIST_FORCELUN 0x002 /* Known to have LUNs, force sanning */
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#define BLIST_BORKEN 0x004 /* Flag for broken handshaking */
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#define BLIST_KEY 0x008 /* Needs to be unlocked by special command */
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#define BLIST_SINGLELUN 0x010 /* LUNs should better not be used in parallel */
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#define BLIST_NOTQ 0x020 /* Buggy Tagged Command Queuing */
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#define BLIST_SPARSELUN 0x040 /* Non consecutive LUN numbering */
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#define BLIST_MAX5LUN 0x080 /* Avoid LUNS >= 5 */
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#define BLIST_ISDISK 0x100 /* Treat as (removable) disk */
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#define BLIST_ISROM 0x200 /* Treat as (removable) CD-ROM */
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#define BLIST_LARGELUN 0x400 /* LUNs larger than 7 despite reporting as SCSI 2 */
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#define BLIST_NOSTARTONADD 0x1000 /* do not do automatic start on add */
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static void print_inquiry(unsigned char *data);
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static int scan_scsis_single(unsigned int channel, unsigned int dev,
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unsigned int lun, int lun0_scsi_level,
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unsigned int *max_scsi_dev, unsigned int *sparse_lun,
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Scsi_Device ** SDpnt, struct Scsi_Host *shpnt,
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char *scsi_result);
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static int find_lun0_scsi_level(unsigned int channel, unsigned int dev,
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struct Scsi_Host *shpnt);
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struct dev_info {
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const char *vendor;
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const char *model;
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const char *revision; /* Latest revision known to be bad. Not used yet */
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unsigned flags;
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};
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/*
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* This is what was previously known as the blacklist. The concept
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* has been expanded so that we can specify other types of things we
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* need to be aware of.
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*/
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static struct dev_info device_list[] =
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{
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/* The following devices are known not to tolerate a lun != 0 scan for
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* one reason or another. Some will respond to all luns, others will
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* lock up.
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*/
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{"Aashima", "IMAGERY 2400SP", "1.03", BLIST_NOLUN}, /* Locks up if polled for lun != 0 */
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{"CHINON", "CD-ROM CDS-431", "H42", BLIST_NOLUN}, /* Locks up if polled for lun != 0 */
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{"CHINON", "CD-ROM CDS-535", "Q14", BLIST_NOLUN}, /* Locks up if polled for lun != 0 */
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{"DENON", "DRD-25X", "V", BLIST_NOLUN}, /* Locks up if probed for lun != 0 */
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{"HITACHI", "DK312C", "CM81", BLIST_NOLUN}, /* Responds to all lun - dtg */
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{"HITACHI", "DK314C", "CR21", BLIST_NOLUN}, /* responds to all lun */
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{"IMS", "CDD521/10", "2.06", BLIST_NOLUN}, /* Locks-up when LUN>0 polled. */
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{"MAXTOR", "XT-3280", "PR02", BLIST_NOLUN}, /* Locks-up when LUN>0 polled. */
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{"MAXTOR", "XT-4380S", "B3C", BLIST_NOLUN}, /* Locks-up when LUN>0 polled. */
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{"MAXTOR", "MXT-1240S", "I1.2", BLIST_NOLUN}, /* Locks up when LUN>0 polled */
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{"MAXTOR", "XT-4170S", "B5A", BLIST_NOLUN}, /* Locks-up sometimes when LUN>0 polled. */
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{"MAXTOR", "XT-8760S", "B7B", BLIST_NOLUN}, /* guess what? */
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{"MEDIAVIS", "RENO CD-ROMX2A", "2.03", BLIST_NOLUN}, /*Responds to all lun */
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{"NEC", "CD-ROM DRIVE:841", "1.0", BLIST_NOLUN}, /* Locks-up when LUN>0 polled. */
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{"PHILIPS", "PCA80SC", "V4-2", BLIST_NOLUN}, /* Responds to all lun */
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{"RODIME", "RO3000S", "2.33", BLIST_NOLUN}, /* Locks up if polled for lun != 0 */
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{"SANYO", "CRD-250S", "1.20", BLIST_NOLUN}, /* causes failed REQUEST SENSE on lun 1
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* for aha152x controller, which causes
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* SCSI code to reset bus.*/
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{"SEAGATE", "ST157N", "\004|j", BLIST_NOLUN}, /* causes failed REQUEST SENSE on lun 1
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* for aha152x controller, which causes
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* SCSI code to reset bus.*/
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{"SEAGATE", "ST296", "921", BLIST_NOLUN}, /* Responds to all lun */
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{"SEAGATE", "ST1581", "6538", BLIST_NOLUN}, /* Responds to all lun */
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{"SONY", "CD-ROM CDU-541", "4.3d", BLIST_NOLUN},
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{"SONY", "CD-ROM CDU-55S", "1.0i", BLIST_NOLUN},
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{"SONY", "CD-ROM CDU-561", "1.7x", BLIST_NOLUN},
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{"SONY", "CD-ROM CDU-8012", "*", BLIST_NOLUN},
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{"TANDBERG", "TDC 3600", "U07", BLIST_NOLUN}, /* Locks up if polled for lun != 0 */
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{"TEAC", "CD-R55S", "1.0H", BLIST_NOLUN}, /* Locks up if polled for lun != 0 */
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{"TEAC", "CD-ROM", "1.06", BLIST_NOLUN}, /* causes failed REQUEST SENSE on lun 1
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* for seagate controller, which causes
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* SCSI code to reset bus.*/
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{"TEAC", "MT-2ST/45S2-27", "RV M", BLIST_NOLUN}, /* Responds to all lun */
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{"TEXEL", "CD-ROM", "1.06", BLIST_NOLUN}, /* causes failed REQUEST SENSE on lun 1
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* for seagate controller, which causes
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* SCSI code to reset bus.*/
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{"QUANTUM", "LPS525S", "3110", BLIST_NOLUN}, /* Locks sometimes if polled for lun != 0 */
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{"QUANTUM", "PD1225S", "3110", BLIST_NOLUN}, /* Locks sometimes if polled for lun != 0 */
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{"QUANTUM", "FIREBALL ST4.3S", "0F0C", BLIST_NOLUN}, /* Locks up when polled for lun != 0 */
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{"MEDIAVIS", "CDR-H93MV", "1.31", BLIST_NOLUN}, /* Locks up if polled for lun != 0 */
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{"SANKYO", "CP525", "6.64", BLIST_NOLUN}, /* causes failed REQ SENSE, extra reset */
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{"HP", "C1750A", "3226", BLIST_NOLUN}, /* scanjet iic */
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{"HP", "C1790A", "", BLIST_NOLUN}, /* scanjet iip */
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{"HP", "C2500A", "", BLIST_NOLUN}, /* scanjet iicx */
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{"HP", "A6188A", "*", BLIST_SPARSELUN | BLIST_LARGELUN},/* HP Va7100 Array */
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{"HP", "A6189A", "*", BLIST_SPARSELUN | BLIST_LARGELUN},/* HP Va7400 Array */
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{"HP", "A6189B", "*", BLIST_SPARSELUN | BLIST_LARGELUN},/* HP Va7110 Array */
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{"HP", "A6218A", "*", BLIST_SPARSELUN | BLIST_LARGELUN},/* HP Va7410 Array */
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{"YAMAHA", "CDR100", "1.00", BLIST_NOLUN}, /* Locks up if polled for lun != 0 */
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{"YAMAHA", "CDR102", "1.00", BLIST_NOLUN}, /* Locks up if polled for lun != 0
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* extra reset */
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{"YAMAHA", "CRW8424S", "1.0", BLIST_NOLUN}, /* Locks up if polled for lun != 0 */
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{"YAMAHA", "CRW6416S", "1.0c", BLIST_NOLUN}, /* Locks up if polled for lun != 0 */
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{"MITSUMI", "CD-R CR-2201CS", "6119", BLIST_NOLUN}, /* Locks up if polled for lun != 0 */
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{"RELISYS", "Scorpio", "*", BLIST_NOLUN}, /* responds to all LUN */
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{"RELISYS", "VM3530+", "*", BLIST_NOLUN}, /* responds to all LUN */
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{"ACROSS", "", "*", BLIST_NOLUN}, /* responds to all LUN */
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{"MICROTEK", "ScanMaker II", "5.61", BLIST_NOLUN}, /* responds to all LUN */
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/*
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* Other types of devices that have special flags.
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*/
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{"SONY", "CD-ROM CDU-8001", "*", BLIST_BORKEN},
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{"TEXEL", "CD-ROM", "1.06", BLIST_BORKEN},
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{"IOMEGA", "Io20S *F", "*", BLIST_KEY},
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{"INSITE", "Floptical F*8I", "*", BLIST_KEY},
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{"INSITE", "I325VM", "*", BLIST_KEY},
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{"LASOUND","CDX7405","3.10", BLIST_MAX5LUN | BLIST_SINGLELUN},
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{"MICROP", "4110", "*", BLIST_NOTQ}, /* Buggy Tagged Queuing */
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{"NRC", "MBR-7", "*", BLIST_FORCELUN | BLIST_SINGLELUN},
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{"NRC", "MBR-7.4", "*", BLIST_FORCELUN | BLIST_SINGLELUN},
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{"REGAL", "CDC-4X", "*", BLIST_MAX5LUN | BLIST_SINGLELUN},
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{"NAKAMICH", "MJ-4.8S", "*", BLIST_FORCELUN | BLIST_SINGLELUN},
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{"NAKAMICH", "MJ-5.16S", "*", BLIST_FORCELUN | BLIST_SINGLELUN},
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{"PIONEER", "CD-ROM DRM-600", "*", BLIST_FORCELUN | BLIST_SINGLELUN},
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{"PIONEER", "CD-ROM DRM-602X", "*", BLIST_FORCELUN | BLIST_SINGLELUN},
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{"PIONEER", "CD-ROM DRM-604X", "*", BLIST_FORCELUN | BLIST_SINGLELUN},
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{"EMULEX", "MD21/S2 ESDI", "*", BLIST_SINGLELUN},
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{"CANON", "IPUBJD", "*", BLIST_SPARSELUN},
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{"nCipher", "Fastness Crypto", "*", BLIST_FORCELUN},
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{"DEC","HSG80","*", BLIST_FORCELUN | BLIST_NOSTARTONADD},
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{"COMPAQ","LOGICAL VOLUME","*", BLIST_FORCELUN},
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{"COMPAQ","CR3500","*", BLIST_FORCELUN},
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{"NEC", "PD-1 ODX654P", "*", BLIST_FORCELUN | BLIST_SINGLELUN},
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{"MATSHITA", "PD-1", "*", BLIST_FORCELUN | BLIST_SINGLELUN},
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{"iomega", "jaz 1GB", "J.86", BLIST_NOTQ | BLIST_NOLUN},
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{"TOSHIBA","CDROM","*", BLIST_ISROM},
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{"TOSHIBA","CD-ROM","*", BLIST_ISROM},
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{"MegaRAID", "LD", "*", BLIST_FORCELUN},
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{"DGC", "RAID", "*", BLIST_SPARSELUN | BLIST_LARGELUN}, // Dell PV 650F (tgt @ LUN 0)
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{"DGC", "DISK", "*", BLIST_SPARSELUN | BLIST_LARGELUN}, // Dell PV 650F (no tgt @ LUN 0)
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{"DELL", "PV660F", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
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{"DELL", "PV660F PSEUDO", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
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{"DELL", "PSEUDO DEVICE .", "*", BLIST_SPARSELUN | BLIST_LARGELUN}, // Dell PV 530F
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{"DELL", "PV530F", "*", BLIST_SPARSELUN | BLIST_LARGELUN}, // Dell PV 530F
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{"EMC", "SYMMETRIX", "*", BLIST_SPARSELUN | BLIST_LARGELUN | BLIST_FORCELUN},
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{"HP", "A6189A", "*", BLIST_SPARSELUN | BLIST_LARGELUN}, // HP VA7400, by Alar Aun
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{"HP", "OPEN-", "*", BLIST_SPARSELUN | BLIST_LARGELUN}, /* HP XP Arrays */
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{"CMD", "CRA-7280", "*", BLIST_SPARSELUN | BLIST_LARGELUN}, // CMD RAID Controller
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{"CNSI", "G7324", "*", BLIST_SPARSELUN | BLIST_LARGELUN}, // Chaparral G7324 RAID
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{"CNSi", "G8324", "*", BLIST_SPARSELUN | BLIST_LARGELUN}, // Chaparral G8324 RAID
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{"Zzyzx", "RocketStor 500S", "*", BLIST_SPARSELUN},
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{"Zzyzx", "RocketStor 2000", "*", BLIST_SPARSELUN},
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{"SONY", "TSL", "*", BLIST_FORCELUN}, // DDS3 & DDS4 autoloaders
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{"DELL", "PERCRAID", "*", BLIST_FORCELUN},
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{"HP", "NetRAID-4M", "*", BLIST_FORCELUN},
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{"ADAPTEC", "AACRAID", "*", BLIST_FORCELUN},
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{"ADAPTEC", "Adaptec 5400S", "*", BLIST_FORCELUN},
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{"APPLE", "Xserve", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
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{"COMPAQ", "MSA1000", "*", BLIST_SPARSELUN | BLIST_LARGELUN | BLIST_NOSTARTONADD},
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{"COMPAQ", "MSA1000 VOLUME", "*", BLIST_SPARSELUN | BLIST_LARGELUN | BLIST_NOSTARTONADD},
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{"COMPAQ", "HSV110", "*", BLIST_SPARSELUN | BLIST_LARGELUN | BLIST_NOSTARTONADD},
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{"HP", "HSV100", "*", BLIST_SPARSELUN | BLIST_LARGELUN | BLIST_NOSTARTONADD},
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{"HP", "C1557A", "*", BLIST_FORCELUN},
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{"IBM", "AuSaV1S2", "*", BLIST_FORCELUN},
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| 186 |
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{"FSC", "CentricStor", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
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{"DDN", "SAN DataDirector", "*", BLIST_SPARSELUN},
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{"HITACHI", "DF400", "*", BLIST_SPARSELUN},
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{"HITACHI", "DF500", "*", BLIST_SPARSELUN},
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| 190 |
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{"HITACHI", "DF600", "*", BLIST_SPARSELUN},
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| 191 |
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{"IBM", "ProFibre 4000R", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
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| 192 |
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{"HITACHI", "OPEN-", "*", BLIST_SPARSELUN | BLIST_LARGELUN}, /* HITACHI XP Arrays */
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| 193 |
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{"HITACHI", "DISK-SUBSYSTEM", "*", BLIST_SPARSELUN | BLIST_LARGELUN}, /* HITACHI 9960 */
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| 194 |
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{"WINSYS","FLASHDISK G6", "*", BLIST_SPARSELUN},
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| 195 |
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{"DotHill","SANnet RAID X300", "*", BLIST_SPARSELUN},
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| 196 |
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{"SUN", "T300", "*", BLIST_SPARSELUN},
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| 197 |
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{"SUN", "T4", "*", BLIST_SPARSELUN},
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| 198 |
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{"SGI", "RAID3", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
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| 199 |
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{"SGI", "RAID5", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
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| 200 |
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{"SGI", "TP9100", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
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| 201 |
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{"SGI", "TP9300", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
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| 202 |
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{"SGI", "TP9400", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
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| 203 |
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{"SGI", "TP9500", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
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| 204 |
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{"MYLEX", "DACARMRB", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
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| 205 |
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{"PLATYPUS", "CX5", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
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| 206 |
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{"Raidtec", "FCR", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
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| 207 |
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{"HP", "C7200", "*", BLIST_SPARSELUN}, /* Medium Changer */
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| 208 |
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{"SMSC", "USB 2 HS", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
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| 209 |
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{"XYRATEX", "RS", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
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| 210 |
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{"NEC", "iStorage", "*", BLIST_SPARSELUN | BLIST_LARGELUN | BLIST_FORCELUN},
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| 211 |
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| 212 |
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/*
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* Must be at end of list...
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| 214 |
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*/
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| 215 |
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{NULL, NULL, NULL}
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| 216 |
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};
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| 218 |
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#define MAX_SCSI_LUNS 0xFFFFFFFF
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| 219 |
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| 220 |
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#ifdef CONFIG_SCSI_MULTI_LUN
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| 221 |
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static unsigned int max_scsi_luns = MAX_SCSI_LUNS;
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| 222 |
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#else
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| 223 |
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static unsigned int max_scsi_luns = 1;
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| 224 |
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#endif
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| 225 |
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| 226 |
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static unsigned int scsi_allow_ghost_devices = 0;
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| 227 |
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| 228 |
|
|
#ifdef MODULE
|
| 229 |
|
|
|
| 230 |
|
|
MODULE_PARM(max_scsi_luns, "i");
|
| 231 |
|
|
MODULE_PARM_DESC(max_scsi_luns, "last scsi LUN (should be between 1 and 2^32-1)");
|
| 232 |
|
|
MODULE_PARM(scsi_allow_ghost_devices, "i");
|
| 233 |
|
|
MODULE_PARM_DESC(scsi_allow_ghost_devices, "allow devices marked as being offline to be accessed anyway (0 = off, else allow ghosts on lun 0 through scsi_allow_ghost_devices - 1");
|
| 234 |
|
|
|
| 235 |
|
|
#else
|
| 236 |
|
|
|
| 237 |
|
|
static int __init scsi_luns_setup(char *str)
|
| 238 |
|
|
{
|
| 239 |
|
|
unsigned int tmp;
|
| 240 |
|
|
|
| 241 |
|
|
if (get_option(&str, &tmp) == 1) {
|
| 242 |
|
|
max_scsi_luns = tmp;
|
| 243 |
|
|
return 1;
|
| 244 |
|
|
} else {
|
| 245 |
|
|
printk("scsi_luns_setup : usage max_scsi_luns=n "
|
| 246 |
|
|
"(n should be between 1 and 2^32-1)\n");
|
| 247 |
|
|
return 0;
|
| 248 |
|
|
}
|
| 249 |
|
|
}
|
| 250 |
|
|
|
| 251 |
|
|
__setup("max_scsi_luns=", scsi_luns_setup);
|
| 252 |
|
|
|
| 253 |
|
|
static int __init scsi_allow_ghost_devices_setup(char *str)
|
| 254 |
|
|
{
|
| 255 |
|
|
unsigned int tmp;
|
| 256 |
|
|
|
| 257 |
|
|
if (get_option(&str, &tmp) == 1) {
|
| 258 |
|
|
scsi_allow_ghost_devices = tmp;
|
| 259 |
|
|
return 1;
|
| 260 |
|
|
} else {
|
| 261 |
|
|
printk("scsi_allow_ghost_devices_setup: usage scsi_allow_ghost_devices=n (0: off else\nallow ghost devices (ghost devices are devices that report themselves as\nbeing offline but which we allow access to anyway) on lun 0 through n - 1.\n");
|
| 262 |
|
|
return 0;
|
| 263 |
|
|
}
|
| 264 |
|
|
}
|
| 265 |
|
|
|
| 266 |
|
|
__setup("scsi_allow_ghost_devices=", scsi_allow_ghost_devices_setup);
|
| 267 |
|
|
|
| 268 |
|
|
#endif
|
| 269 |
|
|
|
| 270 |
|
|
static void print_inquiry(unsigned char *data)
|
| 271 |
|
|
{
|
| 272 |
|
|
int i;
|
| 273 |
|
|
|
| 274 |
|
|
printk(" Vendor: ");
|
| 275 |
|
|
for (i = 8; i < 16; i++) {
|
| 276 |
|
|
if (data[i] >= 0x20 && i < data[4] + 5)
|
| 277 |
|
|
printk("%c", data[i]);
|
| 278 |
|
|
else
|
| 279 |
|
|
printk(" ");
|
| 280 |
|
|
}
|
| 281 |
|
|
|
| 282 |
|
|
printk(" Model: ");
|
| 283 |
|
|
for (i = 16; i < 32; i++) {
|
| 284 |
|
|
if (data[i] >= 0x20 && i < data[4] + 5)
|
| 285 |
|
|
printk("%c", data[i]);
|
| 286 |
|
|
else
|
| 287 |
|
|
printk(" ");
|
| 288 |
|
|
}
|
| 289 |
|
|
|
| 290 |
|
|
printk(" Rev: ");
|
| 291 |
|
|
for (i = 32; i < 36; i++) {
|
| 292 |
|
|
if (data[i] >= 0x20 && i < data[4] + 5)
|
| 293 |
|
|
printk("%c", data[i]);
|
| 294 |
|
|
else
|
| 295 |
|
|
printk(" ");
|
| 296 |
|
|
}
|
| 297 |
|
|
|
| 298 |
|
|
printk("\n");
|
| 299 |
|
|
|
| 300 |
|
|
i = data[0] & 0x1f;
|
| 301 |
|
|
|
| 302 |
|
|
printk(" Type: %s ",
|
| 303 |
|
|
i < MAX_SCSI_DEVICE_CODE ? scsi_device_types[i] : "Unknown ");
|
| 304 |
|
|
printk(" ANSI SCSI revision: %02x", data[2] & 0x07);
|
| 305 |
|
|
if ((data[2] & 0x07) == 1 && (data[3] & 0x0f) == 1)
|
| 306 |
|
|
printk(" CCS\n");
|
| 307 |
|
|
else
|
| 308 |
|
|
printk("\n");
|
| 309 |
|
|
}
|
| 310 |
|
|
|
| 311 |
|
|
static int get_device_flags(unsigned char *response_data)
|
| 312 |
|
|
{
|
| 313 |
|
|
int i = 0;
|
| 314 |
|
|
unsigned char *pnt;
|
| 315 |
|
|
for (i = 0; 1; i++) {
|
| 316 |
|
|
if (device_list[i].vendor == NULL)
|
| 317 |
|
|
return 0;
|
| 318 |
|
|
pnt = &response_data[8];
|
| 319 |
|
|
while (*pnt && *pnt == ' ')
|
| 320 |
|
|
pnt++;
|
| 321 |
|
|
if (memcmp(device_list[i].vendor, pnt,
|
| 322 |
|
|
strlen(device_list[i].vendor)))
|
| 323 |
|
|
continue;
|
| 324 |
|
|
pnt = &response_data[16];
|
| 325 |
|
|
while (*pnt && *pnt == ' ')
|
| 326 |
|
|
pnt++;
|
| 327 |
|
|
if (memcmp(device_list[i].model, pnt,
|
| 328 |
|
|
strlen(device_list[i].model)))
|
| 329 |
|
|
continue;
|
| 330 |
|
|
return device_list[i].flags;
|
| 331 |
|
|
}
|
| 332 |
|
|
return 0;
|
| 333 |
|
|
}
|
| 334 |
|
|
|
| 335 |
|
|
/*
|
| 336 |
|
|
* Detecting SCSI devices :
|
| 337 |
|
|
* We scan all present host adapter's busses, from ID 0 to ID (max_id).
|
| 338 |
|
|
* We use the INQUIRY command, determine device type, and pass the ID /
|
| 339 |
|
|
* lun address of all sequential devices to the tape driver, all random
|
| 340 |
|
|
* devices to the disk driver.
|
| 341 |
|
|
*/
|
| 342 |
|
|
void scan_scsis(struct Scsi_Host *shpnt,
|
| 343 |
|
|
uint hardcoded,
|
| 344 |
|
|
uint hchannel,
|
| 345 |
|
|
uint hid,
|
| 346 |
|
|
uint hlun)
|
| 347 |
|
|
{
|
| 348 |
|
|
uint channel;
|
| 349 |
|
|
unsigned int dev;
|
| 350 |
|
|
unsigned int lun;
|
| 351 |
|
|
unsigned int max_dev_lun;
|
| 352 |
|
|
unsigned char *scsi_result;
|
| 353 |
|
|
unsigned char scsi_result0[256];
|
| 354 |
|
|
Scsi_Device *SDpnt;
|
| 355 |
|
|
Scsi_Device *SDtail;
|
| 356 |
|
|
unsigned int sparse_lun;
|
| 357 |
|
|
int lun0_sl;
|
| 358 |
|
|
|
| 359 |
|
|
scsi_result = NULL;
|
| 360 |
|
|
|
| 361 |
|
|
SDpnt = (Scsi_Device *) kmalloc(sizeof(Scsi_Device),
|
| 362 |
|
|
GFP_ATOMIC);
|
| 363 |
|
|
if (SDpnt) {
|
| 364 |
|
|
memset(SDpnt, 0, sizeof(Scsi_Device));
|
| 365 |
|
|
/*
|
| 366 |
|
|
* Register the queue for the device. All I/O requests will
|
| 367 |
|
|
* come in through here. We also need to register a pointer to
|
| 368 |
|
|
* ourselves, since the queue handler won't know what device
|
| 369 |
|
|
* the queue actually represents. We could look it up, but it
|
| 370 |
|
|
* is pointless work.
|
| 371 |
|
|
*/
|
| 372 |
|
|
scsi_initialize_queue(SDpnt, shpnt);
|
| 373 |
|
|
SDpnt->request_queue.queuedata = (void *) SDpnt;
|
| 374 |
|
|
/* Make sure we have something that is valid for DMA purposes */
|
| 375 |
|
|
scsi_result = ((!shpnt->unchecked_isa_dma)
|
| 376 |
|
|
? &scsi_result0[0] : kmalloc(512, GFP_DMA));
|
| 377 |
|
|
}
|
| 378 |
|
|
|
| 379 |
|
|
if (scsi_result == NULL) {
|
| 380 |
|
|
printk("Unable to obtain scsi_result buffer\n");
|
| 381 |
|
|
goto leave;
|
| 382 |
|
|
}
|
| 383 |
|
|
/*
|
| 384 |
|
|
* We must chain ourself in the host_queue, so commands can time out
|
| 385 |
|
|
*/
|
| 386 |
|
|
SDpnt->queue_depth = 1;
|
| 387 |
|
|
SDpnt->host = shpnt;
|
| 388 |
|
|
SDpnt->online = TRUE;
|
| 389 |
|
|
|
| 390 |
|
|
initialize_merge_fn(SDpnt);
|
| 391 |
|
|
|
| 392 |
|
|
/*
|
| 393 |
|
|
* Initialize the object that we will use to wait for command blocks.
|
| 394 |
|
|
*/
|
| 395 |
|
|
init_waitqueue_head(&SDpnt->scpnt_wait);
|
| 396 |
|
|
|
| 397 |
|
|
/*
|
| 398 |
|
|
* Next, hook the device to the host in question.
|
| 399 |
|
|
*/
|
| 400 |
|
|
SDpnt->prev = NULL;
|
| 401 |
|
|
SDpnt->next = NULL;
|
| 402 |
|
|
if (shpnt->host_queue != NULL) {
|
| 403 |
|
|
SDtail = shpnt->host_queue;
|
| 404 |
|
|
while (SDtail->next != NULL)
|
| 405 |
|
|
SDtail = SDtail->next;
|
| 406 |
|
|
|
| 407 |
|
|
SDtail->next = SDpnt;
|
| 408 |
|
|
SDpnt->prev = SDtail;
|
| 409 |
|
|
} else {
|
| 410 |
|
|
shpnt->host_queue = SDpnt;
|
| 411 |
|
|
}
|
| 412 |
|
|
|
| 413 |
|
|
/*
|
| 414 |
|
|
* We need to increment the counter for this one device so we can track
|
| 415 |
|
|
* when things are quiet.
|
| 416 |
|
|
*/
|
| 417 |
|
|
if (hardcoded == 1) {
|
| 418 |
|
|
Scsi_Device *oldSDpnt = SDpnt;
|
| 419 |
|
|
struct Scsi_Device_Template *sdtpnt;
|
| 420 |
|
|
channel = hchannel;
|
| 421 |
|
|
if (channel > shpnt->max_channel)
|
| 422 |
|
|
goto leave;
|
| 423 |
|
|
dev = hid;
|
| 424 |
|
|
if (dev >= shpnt->max_id)
|
| 425 |
|
|
goto leave;
|
| 426 |
|
|
lun = hlun;
|
| 427 |
|
|
if (lun >= shpnt->max_lun)
|
| 428 |
|
|
goto leave;
|
| 429 |
|
|
if ((0 == lun) || (lun > 7))
|
| 430 |
|
|
lun0_sl = SCSI_3; /* actually don't care for 0 == lun */
|
| 431 |
|
|
else
|
| 432 |
|
|
lun0_sl = find_lun0_scsi_level(channel, dev, shpnt);
|
| 433 |
|
|
scan_scsis_single(channel, dev, lun, lun0_sl, &max_dev_lun,
|
| 434 |
|
|
&sparse_lun, &SDpnt, shpnt, scsi_result);
|
| 435 |
|
|
if (SDpnt != oldSDpnt) {
|
| 436 |
|
|
|
| 437 |
|
|
/* it could happen the blockdevice hasn't yet been inited */
|
| 438 |
|
|
/* queue_depth() moved from scsi_proc_info() so that
|
| 439 |
|
|
it is called before scsi_build_commandblocks() */
|
| 440 |
|
|
if (shpnt->select_queue_depths != NULL)
|
| 441 |
|
|
(shpnt->select_queue_depths)(shpnt,
|
| 442 |
|
|
shpnt->host_queue);
|
| 443 |
|
|
|
| 444 |
|
|
for (sdtpnt = scsi_devicelist; sdtpnt; sdtpnt = sdtpnt->next)
|
| 445 |
|
|
if (sdtpnt->init && sdtpnt->dev_noticed)
|
| 446 |
|
|
(*sdtpnt->init) ();
|
| 447 |
|
|
|
| 448 |
|
|
for (sdtpnt = scsi_devicelist; sdtpnt; sdtpnt = sdtpnt->next) {
|
| 449 |
|
|
if (sdtpnt->attach) {
|
| 450 |
|
|
(*sdtpnt->attach) (oldSDpnt);
|
| 451 |
|
|
if (oldSDpnt->attached) {
|
| 452 |
|
|
scsi_build_commandblocks(oldSDpnt);
|
| 453 |
|
|
if (0 == oldSDpnt->has_cmdblocks) {
|
| 454 |
|
|
printk("scan_scsis: DANGER, no command blocks\n");
|
| 455 |
|
|
/* What to do now ?? */
|
| 456 |
|
|
}
|
| 457 |
|
|
}
|
| 458 |
|
|
}
|
| 459 |
|
|
}
|
| 460 |
|
|
scsi_resize_dma_pool();
|
| 461 |
|
|
|
| 462 |
|
|
for (sdtpnt = scsi_devicelist; sdtpnt; sdtpnt = sdtpnt->next) {
|
| 463 |
|
|
if (sdtpnt->finish && sdtpnt->nr_dev) {
|
| 464 |
|
|
(*sdtpnt->finish) ();
|
| 465 |
|
|
}
|
| 466 |
|
|
}
|
| 467 |
|
|
}
|
| 468 |
|
|
} else {
|
| 469 |
|
|
/* Actual LUN. PC ordering is 0->n IBM/spec ordering is n->0 */
|
| 470 |
|
|
int order_dev;
|
| 471 |
|
|
|
| 472 |
|
|
for (channel = 0; channel <= shpnt->max_channel; channel++) {
|
| 473 |
|
|
for (dev = 0; dev < shpnt->max_id; ++dev) {
|
| 474 |
|
|
if (shpnt->reverse_ordering)
|
| 475 |
|
|
/* Shift to scanning 15,14,13... or 7,6,5,4, */
|
| 476 |
|
|
order_dev = shpnt->max_id - dev - 1;
|
| 477 |
|
|
else
|
| 478 |
|
|
order_dev = dev;
|
| 479 |
|
|
|
| 480 |
|
|
if (shpnt->this_id != order_dev) {
|
| 481 |
|
|
|
| 482 |
|
|
/*
|
| 483 |
|
|
* We need the for so our continue, etc. work fine. We put this in
|
| 484 |
|
|
* a variable so that we can override it during the scan if we
|
| 485 |
|
|
* detect a device *KNOWN* to have multiple logical units.
|
| 486 |
|
|
*/
|
| 487 |
|
|
max_dev_lun = (max_scsi_luns < shpnt->max_lun ?
|
| 488 |
|
|
max_scsi_luns : shpnt->max_lun);
|
| 489 |
|
|
sparse_lun = 0;
|
| 490 |
|
|
for (lun = 0, lun0_sl = SCSI_2; lun < max_dev_lun; ++lun) {
|
| 491 |
|
|
/* don't probe further for luns > 7 for targets <= SCSI_2 */
|
| 492 |
|
|
if ((lun0_sl < SCSI_3) && (lun > 7))
|
| 493 |
|
|
break;
|
| 494 |
|
|
|
| 495 |
|
|
if (!scan_scsis_single(channel, order_dev, lun, lun0_sl,
|
| 496 |
|
|
&max_dev_lun, &sparse_lun, &SDpnt, shpnt,
|
| 497 |
|
|
scsi_result)
|
| 498 |
|
|
&& !sparse_lun)
|
| 499 |
|
|
break; /* break means don't probe further for luns!=0 */
|
| 500 |
|
|
if (SDpnt && (0 == lun)) {
|
| 501 |
|
|
int bflags = get_device_flags (scsi_result);
|
| 502 |
|
|
if (bflags & BLIST_LARGELUN)
|
| 503 |
|
|
lun0_sl = SCSI_3; /* treat as SCSI 3 */
|
| 504 |
|
|
else
|
| 505 |
|
|
lun0_sl = SDpnt->scsi_level;
|
| 506 |
|
|
}
|
| 507 |
|
|
} /* for lun ends */
|
| 508 |
|
|
} /* if this_id != id ends */
|
| 509 |
|
|
} /* for dev ends */
|
| 510 |
|
|
} /* for channel ends */
|
| 511 |
|
|
} /* if/else hardcoded */
|
| 512 |
|
|
|
| 513 |
|
|
leave:
|
| 514 |
|
|
|
| 515 |
|
|
{ /* Unchain SRpnt from host_queue */
|
| 516 |
|
|
Scsi_Device *prev, *next;
|
| 517 |
|
|
Scsi_Device *dqptr;
|
| 518 |
|
|
|
| 519 |
|
|
for (dqptr = shpnt->host_queue; dqptr != SDpnt; dqptr = dqptr->next)
|
| 520 |
|
|
continue;
|
| 521 |
|
|
if (dqptr) {
|
| 522 |
|
|
prev = dqptr->prev;
|
| 523 |
|
|
next = dqptr->next;
|
| 524 |
|
|
if (prev)
|
| 525 |
|
|
prev->next = next;
|
| 526 |
|
|
else
|
| 527 |
|
|
shpnt->host_queue = next;
|
| 528 |
|
|
if (next)
|
| 529 |
|
|
next->prev = prev;
|
| 530 |
|
|
}
|
| 531 |
|
|
}
|
| 532 |
|
|
|
| 533 |
|
|
/* Last device block does not exist. Free memory. */
|
| 534 |
|
|
if (SDpnt != NULL) {
|
| 535 |
|
|
blk_cleanup_queue(&SDpnt->request_queue);
|
| 536 |
|
|
kfree((char *) SDpnt);
|
| 537 |
|
|
}
|
| 538 |
|
|
|
| 539 |
|
|
/* If we allocated a buffer so we could do DMA, free it now */
|
| 540 |
|
|
if (scsi_result != &scsi_result0[0] && scsi_result != NULL) {
|
| 541 |
|
|
kfree(scsi_result);
|
| 542 |
|
|
} {
|
| 543 |
|
|
Scsi_Device *sdev;
|
| 544 |
|
|
Scsi_Cmnd *scmd;
|
| 545 |
|
|
|
| 546 |
|
|
SCSI_LOG_SCAN_BUS(4, printk("Host status for host %p:\n", shpnt));
|
| 547 |
|
|
for (sdev = shpnt->host_queue; sdev; sdev = sdev->next) {
|
| 548 |
|
|
SCSI_LOG_SCAN_BUS(4, printk("Device %d %p: ", sdev->id, sdev));
|
| 549 |
|
|
for (scmd = sdev->device_queue; scmd; scmd = scmd->next) {
|
| 550 |
|
|
SCSI_LOG_SCAN_BUS(4, printk("%p ", scmd));
|
| 551 |
|
|
}
|
| 552 |
|
|
SCSI_LOG_SCAN_BUS(4, printk("\n"));
|
| 553 |
|
|
}
|
| 554 |
|
|
}
|
| 555 |
|
|
}
|
| 556 |
|
|
|
| 557 |
|
|
/*
|
| 558 |
|
|
* The worker for scan_scsis.
|
| 559 |
|
|
* Returning 0 means Please don't ask further for lun!=0, 1 means OK go on.
|
| 560 |
|
|
* Global variables used : scsi_devices(linked list)
|
| 561 |
|
|
*/
|
| 562 |
|
|
static int scan_scsis_single(unsigned int channel, unsigned int dev,
|
| 563 |
|
|
unsigned int lun, int lun0_scsi_level,
|
| 564 |
|
|
unsigned int *max_dev_lun, unsigned int *sparse_lun,
|
| 565 |
|
|
Scsi_Device ** SDpnt2, struct Scsi_Host *shpnt,
|
| 566 |
|
|
char *scsi_result)
|
| 567 |
|
|
{
|
| 568 |
|
|
char devname[64];
|
| 569 |
|
|
unsigned char scsi_cmd[MAX_COMMAND_SIZE];
|
| 570 |
|
|
struct Scsi_Device_Template *sdtpnt;
|
| 571 |
|
|
Scsi_Device *SDtail, *SDpnt = *SDpnt2;
|
| 572 |
|
|
Scsi_Request * SRpnt;
|
| 573 |
|
|
int bflags, type = -1;
|
| 574 |
|
|
extern devfs_handle_t scsi_devfs_handle;
|
| 575 |
|
|
int scsi_level;
|
| 576 |
|
|
|
| 577 |
|
|
SDpnt->host = shpnt;
|
| 578 |
|
|
SDpnt->id = dev;
|
| 579 |
|
|
SDpnt->lun = lun;
|
| 580 |
|
|
SDpnt->channel = channel;
|
| 581 |
|
|
SDpnt->online = TRUE;
|
| 582 |
|
|
|
| 583 |
|
|
scsi_build_commandblocks(SDpnt);
|
| 584 |
|
|
|
| 585 |
|
|
/* Some low level driver could use device->type (DB) */
|
| 586 |
|
|
SDpnt->type = -1;
|
| 587 |
|
|
|
| 588 |
|
|
/*
|
| 589 |
|
|
* Assume that the device will have handshaking problems, and then fix
|
| 590 |
|
|
* this field later if it turns out it doesn't
|
| 591 |
|
|
*/
|
| 592 |
|
|
SDpnt->borken = 1;
|
| 593 |
|
|
SDpnt->was_reset = 0;
|
| 594 |
|
|
SDpnt->expecting_cc_ua = 0;
|
| 595 |
|
|
SDpnt->starved = 0;
|
| 596 |
|
|
|
| 597 |
|
|
if (NULL == (SRpnt = scsi_allocate_request(SDpnt))) {
|
| 598 |
|
|
printk("scan_scsis_single: no memory\n");
|
| 599 |
|
|
return 0;
|
| 600 |
|
|
}
|
| 601 |
|
|
|
| 602 |
|
|
/*
|
| 603 |
|
|
* We used to do a TEST_UNIT_READY before the INQUIRY but that was
|
| 604 |
|
|
* not really necessary. Spec recommends using INQUIRY to scan for
|
| 605 |
|
|
* devices (and TEST_UNIT_READY to poll for media change). - Paul G.
|
| 606 |
|
|
*/
|
| 607 |
|
|
|
| 608 |
|
|
SCSI_LOG_SCAN_BUS(3, printk("scsi: performing INQUIRY\n"));
|
| 609 |
|
|
/*
|
| 610 |
|
|
* Build an INQUIRY command block.
|
| 611 |
|
|
*/
|
| 612 |
|
|
scsi_cmd[0] = INQUIRY;
|
| 613 |
|
|
if ((lun > 0) && (lun0_scsi_level <= SCSI_2))
|
| 614 |
|
|
scsi_cmd[1] = (lun << 5) & 0xe0;
|
| 615 |
|
|
else
|
| 616 |
|
|
scsi_cmd[1] = 0; /* SCSI_3 and higher, don't touch */
|
| 617 |
|
|
scsi_cmd[2] = 0;
|
| 618 |
|
|
scsi_cmd[3] = 0;
|
| 619 |
|
|
scsi_cmd[4] = 255;
|
| 620 |
|
|
scsi_cmd[5] = 0;
|
| 621 |
|
|
SRpnt->sr_cmd_len = 0;
|
| 622 |
|
|
SRpnt->sr_data_direction = SCSI_DATA_READ;
|
| 623 |
|
|
|
| 624 |
|
|
scsi_wait_req (SRpnt, (void *) scsi_cmd,
|
| 625 |
|
|
(void *) scsi_result,
|
| 626 |
|
|
256, SCSI_TIMEOUT+4*HZ, 3);
|
| 627 |
|
|
|
| 628 |
|
|
SCSI_LOG_SCAN_BUS(3, printk("scsi: INQUIRY %s with code 0x%x\n",
|
| 629 |
|
|
SRpnt->sr_result ? "failed" : "successful", SRpnt->sr_result));
|
| 630 |
|
|
|
| 631 |
|
|
/*
|
| 632 |
|
|
* Now that we don't do TEST_UNIT_READY anymore, we must be prepared
|
| 633 |
|
|
* for media change conditions here, so cannot require zero result.
|
| 634 |
|
|
*/
|
| 635 |
|
|
if (SRpnt->sr_result) {
|
| 636 |
|
|
if ((driver_byte(SRpnt->sr_result) & DRIVER_SENSE) != 0 &&
|
| 637 |
|
|
(SRpnt->sr_sense_buffer[2] & 0xf) == UNIT_ATTENTION &&
|
| 638 |
|
|
SRpnt->sr_sense_buffer[12] == 0x28 &&
|
| 639 |
|
|
SRpnt->sr_sense_buffer[13] == 0) {
|
| 640 |
|
|
/* not-ready to ready transition - good */
|
| 641 |
|
|
} else {
|
| 642 |
|
|
/* assume no peripheral if any other sort of error */
|
| 643 |
|
|
scsi_release_request(SRpnt);
|
| 644 |
|
|
scsi_release_commandblocks(SDpnt);
|
| 645 |
|
|
return 0;
|
| 646 |
|
|
}
|
| 647 |
|
|
}
|
| 648 |
|
|
|
| 649 |
|
|
/*
|
| 650 |
|
|
* Check for SPARSELUN before checking the peripheral qualifier,
|
| 651 |
|
|
* so sparse lun devices are completely scanned.
|
| 652 |
|
|
*/
|
| 653 |
|
|
|
| 654 |
|
|
/*
|
| 655 |
|
|
* If we are offline and we are on a LUN != 0, then skip this entry.
|
| 656 |
|
|
* If we are on a BLIST_FORCELUN device this will stop the scan at
|
| 657 |
|
|
* the first offline LUN (typically the correct thing to do). If
|
| 658 |
|
|
* we are on a BLIST_SPARSELUN device then this won't stop the scan,
|
| 659 |
|
|
* but it will keep us from having false entries in our device
|
| 660 |
|
|
* array. DL
|
| 661 |
|
|
*
|
| 662 |
|
|
* NOTE: Need to test this to make sure it doesn't cause problems
|
| 663 |
|
|
* with tape autoloaders, multidisc CD changers, and external
|
| 664 |
|
|
* RAID chassis that might use sparse luns or multiluns... DL
|
| 665 |
|
|
*/
|
| 666 |
|
|
if (lun != 0 && (scsi_result[0] >> 5) == 1) {
|
| 667 |
|
|
scsi_release_request(SRpnt);
|
| 668 |
|
|
scsi_release_commandblocks(SDpnt);
|
| 669 |
|
|
return 0;
|
| 670 |
|
|
}
|
| 671 |
|
|
|
| 672 |
|
|
/*
|
| 673 |
|
|
* Get any flags for this device.
|
| 674 |
|
|
*/
|
| 675 |
|
|
bflags = get_device_flags (scsi_result);
|
| 676 |
|
|
|
| 677 |
|
|
if (bflags & BLIST_SPARSELUN) {
|
| 678 |
|
|
*sparse_lun = 1;
|
| 679 |
|
|
}
|
| 680 |
|
|
/*
|
| 681 |
|
|
* Check the peripheral qualifier field - this tells us whether LUNS
|
| 682 |
|
|
* are supported here or not.
|
| 683 |
|
|
*/
|
| 684 |
|
|
if ((scsi_result[0] >> 5) == 3) {
|
| 685 |
|
|
scsi_release_request(SRpnt);
|
| 686 |
|
|
return 0; /* assume no peripheral if any sort of error */
|
| 687 |
|
|
}
|
| 688 |
|
|
/* The Toshiba ROM was "gender-changed" here as an inline hack.
|
| 689 |
|
|
This is now much more generic.
|
| 690 |
|
|
This is a mess: What we really want is to leave the scsi_result
|
| 691 |
|
|
alone, and just change the SDpnt structure. And the SDpnt is what
|
| 692 |
|
|
we want print_inquiry to print. -- REW
|
| 693 |
|
|
*/
|
| 694 |
|
|
if (bflags & BLIST_ISDISK) {
|
| 695 |
|
|
scsi_result[0] = TYPE_DISK;
|
| 696 |
|
|
scsi_result[1] |= 0x80; /* removable */
|
| 697 |
|
|
}
|
| 698 |
|
|
|
| 699 |
|
|
if (bflags & BLIST_ISROM) {
|
| 700 |
|
|
scsi_result[0] = TYPE_ROM;
|
| 701 |
|
|
scsi_result[1] |= 0x80; /* removable */
|
| 702 |
|
|
}
|
| 703 |
|
|
|
| 704 |
|
|
memcpy(SDpnt->vendor, scsi_result + 8, 8);
|
| 705 |
|
|
memcpy(SDpnt->model, scsi_result + 16, 16);
|
| 706 |
|
|
memcpy(SDpnt->rev, scsi_result + 32, 4);
|
| 707 |
|
|
|
| 708 |
|
|
SDpnt->removable = (0x80 & scsi_result[1]) >> 7;
|
| 709 |
|
|
/* Use the peripheral qualifier field to determine online/offline */
|
| 710 |
|
|
if ((((scsi_result[0] >> 5) & 7) == 1) &&
|
| 711 |
|
|
(lun >= scsi_allow_ghost_devices))
|
| 712 |
|
|
SDpnt->online = FALSE;
|
| 713 |
|
|
else
|
| 714 |
|
|
SDpnt->online = TRUE;
|
| 715 |
|
|
SDpnt->lockable = SDpnt->removable;
|
| 716 |
|
|
SDpnt->changed = 0;
|
| 717 |
|
|
SDpnt->access_count = 0;
|
| 718 |
|
|
SDpnt->busy = 0;
|
| 719 |
|
|
SDpnt->has_cmdblocks = 0;
|
| 720 |
|
|
/*
|
| 721 |
|
|
* Currently, all sequential devices are assumed to be tapes, all random
|
| 722 |
|
|
* devices disk, with the appropriate read only flags set for ROM / WORM
|
| 723 |
|
|
* treated as RO.
|
| 724 |
|
|
*/
|
| 725 |
|
|
switch (type = (scsi_result[0] & 0x1f)) {
|
| 726 |
|
|
case TYPE_TAPE:
|
| 727 |
|
|
case TYPE_DISK:
|
| 728 |
|
|
case TYPE_PRINTER:
|
| 729 |
|
|
case TYPE_MOD:
|
| 730 |
|
|
case TYPE_PROCESSOR:
|
| 731 |
|
|
case TYPE_SCANNER:
|
| 732 |
|
|
case TYPE_MEDIUM_CHANGER:
|
| 733 |
|
|
case TYPE_ENCLOSURE:
|
| 734 |
|
|
case TYPE_COMM:
|
| 735 |
|
|
SDpnt->writeable = 1;
|
| 736 |
|
|
break;
|
| 737 |
|
|
case TYPE_WORM:
|
| 738 |
|
|
case TYPE_ROM:
|
| 739 |
|
|
SDpnt->writeable = 0;
|
| 740 |
|
|
break;
|
| 741 |
|
|
default:
|
| 742 |
|
|
printk("scsi: unknown type %d\n", type);
|
| 743 |
|
|
}
|
| 744 |
|
|
|
| 745 |
|
|
SDpnt->device_blocked = FALSE;
|
| 746 |
|
|
SDpnt->device_busy = 0;
|
| 747 |
|
|
SDpnt->single_lun = 0;
|
| 748 |
|
|
SDpnt->soft_reset =
|
| 749 |
|
|
(scsi_result[7] & 1) && ((scsi_result[3] & 7) == 2);
|
| 750 |
|
|
SDpnt->random = (type == TYPE_TAPE) ? 0 : 1;
|
| 751 |
|
|
SDpnt->type = (type & 0x1f);
|
| 752 |
|
|
|
| 753 |
|
|
print_inquiry(scsi_result);
|
| 754 |
|
|
|
| 755 |
|
|
sprintf (devname, "host%d/bus%d/target%d/lun%d",
|
| 756 |
|
|
SDpnt->host->host_no, SDpnt->channel, SDpnt->id, SDpnt->lun);
|
| 757 |
|
|
if (SDpnt->de) printk ("DEBUG: dir: \"%s\" already exists\n", devname);
|
| 758 |
|
|
else SDpnt->de = devfs_mk_dir (scsi_devfs_handle, devname, NULL);
|
| 759 |
|
|
|
| 760 |
|
|
for (sdtpnt = scsi_devicelist; sdtpnt;
|
| 761 |
|
|
sdtpnt = sdtpnt->next)
|
| 762 |
|
|
if (sdtpnt->detect)
|
| 763 |
|
|
SDpnt->attached +=
|
| 764 |
|
|
(*sdtpnt->detect) (SDpnt);
|
| 765 |
|
|
|
| 766 |
|
|
SDpnt->scsi_level = scsi_result[2] & 0x07;
|
| 767 |
|
|
if (SDpnt->scsi_level >= 2 ||
|
| 768 |
|
|
(SDpnt->scsi_level == 1 &&
|
| 769 |
|
|
(scsi_result[3] & 0x0f) == 1))
|
| 770 |
|
|
SDpnt->scsi_level++;
|
| 771 |
|
|
scsi_level = SDpnt->scsi_level;
|
| 772 |
|
|
|
| 773 |
|
|
/*
|
| 774 |
|
|
* Accommodate drivers that want to sleep when they should be in a polling
|
| 775 |
|
|
* loop.
|
| 776 |
|
|
*/
|
| 777 |
|
|
SDpnt->disconnect = 0;
|
| 778 |
|
|
|
| 779 |
|
|
|
| 780 |
|
|
/*
|
| 781 |
|
|
* Set the tagged_queue flag for SCSI-II devices that purport to support
|
| 782 |
|
|
* tagged queuing in the INQUIRY data.
|
| 783 |
|
|
*/
|
| 784 |
|
|
SDpnt->tagged_queue = 0;
|
| 785 |
|
|
if ((SDpnt->scsi_level >= SCSI_2) &&
|
| 786 |
|
|
(scsi_result[7] & 2) &&
|
| 787 |
|
|
!(bflags & BLIST_NOTQ)) {
|
| 788 |
|
|
SDpnt->tagged_supported = 1;
|
| 789 |
|
|
SDpnt->current_tag = 0;
|
| 790 |
|
|
}
|
| 791 |
|
|
/*
|
| 792 |
|
|
* Some revisions of the Texel CD ROM drives have handshaking problems when
|
| 793 |
|
|
* used with the Seagate controllers. Before we know what type of device
|
| 794 |
|
|
* we're talking to, we assume it's borken and then change it here if it
|
| 795 |
|
|
* turns out that it isn't a TEXEL drive.
|
| 796 |
|
|
*/
|
| 797 |
|
|
if ((bflags & BLIST_BORKEN) == 0)
|
| 798 |
|
|
SDpnt->borken = 0;
|
| 799 |
|
|
|
| 800 |
|
|
/*
|
| 801 |
|
|
* Some devices may not want to have a start command automatically
|
| 802 |
|
|
* issued when a device is added.
|
| 803 |
|
|
*/
|
| 804 |
|
|
if (bflags & BLIST_NOSTARTONADD)
|
| 805 |
|
|
SDpnt->no_start_on_add = 1;
|
| 806 |
|
|
|
| 807 |
|
|
/*
|
| 808 |
|
|
* If we want to only allow I/O to one of the luns attached to this device
|
| 809 |
|
|
* at a time, then we set this flag.
|
| 810 |
|
|
*/
|
| 811 |
|
|
if (bflags & BLIST_SINGLELUN)
|
| 812 |
|
|
SDpnt->single_lun = 1;
|
| 813 |
|
|
|
| 814 |
|
|
/*
|
| 815 |
|
|
* These devices need this "key" to unlock the devices so we can use it
|
| 816 |
|
|
*/
|
| 817 |
|
|
if ((bflags & BLIST_KEY) != 0) {
|
| 818 |
|
|
printk("Unlocked floptical drive.\n");
|
| 819 |
|
|
SDpnt->lockable = 0;
|
| 820 |
|
|
scsi_cmd[0] = MODE_SENSE;
|
| 821 |
|
|
if (shpnt->max_lun <= 8)
|
| 822 |
|
|
scsi_cmd[1] = (lun << 5) & 0xe0;
|
| 823 |
|
|
else scsi_cmd[1] = 0; /* any other idea? */
|
| 824 |
|
|
scsi_cmd[2] = 0x2e;
|
| 825 |
|
|
scsi_cmd[3] = 0;
|
| 826 |
|
|
scsi_cmd[4] = 0x2a;
|
| 827 |
|
|
scsi_cmd[5] = 0;
|
| 828 |
|
|
SRpnt->sr_cmd_len = 0;
|
| 829 |
|
|
SRpnt->sr_data_direction = SCSI_DATA_READ;
|
| 830 |
|
|
scsi_wait_req (SRpnt, (void *) scsi_cmd,
|
| 831 |
|
|
(void *) scsi_result, 0x2a,
|
| 832 |
|
|
SCSI_TIMEOUT, 3);
|
| 833 |
|
|
}
|
| 834 |
|
|
|
| 835 |
|
|
scsi_release_request(SRpnt);
|
| 836 |
|
|
SRpnt = NULL;
|
| 837 |
|
|
|
| 838 |
|
|
scsi_release_commandblocks(SDpnt);
|
| 839 |
|
|
|
| 840 |
|
|
/*
|
| 841 |
|
|
* This device was already hooked up to the host in question,
|
| 842 |
|
|
* so at this point we just let go of it and it should be fine. We do need to
|
| 843 |
|
|
* allocate a new one and attach it to the host so that we can further scan the bus.
|
| 844 |
|
|
*/
|
| 845 |
|
|
SDpnt = (Scsi_Device *) kmalloc(sizeof(Scsi_Device), GFP_ATOMIC);
|
| 846 |
|
|
if (!SDpnt) {
|
| 847 |
|
|
printk("scsi: scan_scsis_single: Cannot malloc\n");
|
| 848 |
|
|
return 0;
|
| 849 |
|
|
}
|
| 850 |
|
|
memset(SDpnt, 0, sizeof(Scsi_Device));
|
| 851 |
|
|
|
| 852 |
|
|
*SDpnt2 = SDpnt;
|
| 853 |
|
|
SDpnt->queue_depth = 1;
|
| 854 |
|
|
SDpnt->host = shpnt;
|
| 855 |
|
|
SDpnt->online = TRUE;
|
| 856 |
|
|
SDpnt->scsi_level = scsi_level;
|
| 857 |
|
|
|
| 858 |
|
|
/*
|
| 859 |
|
|
* Register the queue for the device. All I/O requests will come
|
| 860 |
|
|
* in through here. We also need to register a pointer to
|
| 861 |
|
|
* ourselves, since the queue handler won't know what device
|
| 862 |
|
|
* the queue actually represents. We could look it up, but it
|
| 863 |
|
|
* is pointless work.
|
| 864 |
|
|
*/
|
| 865 |
|
|
scsi_initialize_queue(SDpnt, shpnt);
|
| 866 |
|
|
SDpnt->host = shpnt;
|
| 867 |
|
|
initialize_merge_fn(SDpnt);
|
| 868 |
|
|
|
| 869 |
|
|
/*
|
| 870 |
|
|
* Mark this device as online, or otherwise we won't be able to do much with it.
|
| 871 |
|
|
*/
|
| 872 |
|
|
SDpnt->online = TRUE;
|
| 873 |
|
|
|
| 874 |
|
|
/*
|
| 875 |
|
|
* Initialize the object that we will use to wait for command blocks.
|
| 876 |
|
|
*/
|
| 877 |
|
|
init_waitqueue_head(&SDpnt->scpnt_wait);
|
| 878 |
|
|
|
| 879 |
|
|
/*
|
| 880 |
|
|
* Since we just found one device, there had damn well better be one in the list
|
| 881 |
|
|
* already.
|
| 882 |
|
|
*/
|
| 883 |
|
|
if (shpnt->host_queue == NULL)
|
| 884 |
|
|
panic("scan_scsis_single: Host queue == NULL\n");
|
| 885 |
|
|
|
| 886 |
|
|
SDtail = shpnt->host_queue;
|
| 887 |
|
|
while (SDtail->next) {
|
| 888 |
|
|
SDtail = SDtail->next;
|
| 889 |
|
|
}
|
| 890 |
|
|
|
| 891 |
|
|
/* Add this device to the linked list at the end */
|
| 892 |
|
|
SDtail->next = SDpnt;
|
| 893 |
|
|
SDpnt->prev = SDtail;
|
| 894 |
|
|
SDpnt->next = NULL;
|
| 895 |
|
|
|
| 896 |
|
|
/*
|
| 897 |
|
|
* Some scsi devices cannot be polled for lun != 0 due to firmware bugs
|
| 898 |
|
|
*/
|
| 899 |
|
|
if (bflags & BLIST_NOLUN)
|
| 900 |
|
|
return 0; /* break; */
|
| 901 |
|
|
|
| 902 |
|
|
/*
|
| 903 |
|
|
* If this device is known to support sparse multiple units, override the
|
| 904 |
|
|
* other settings, and scan all of them.
|
| 905 |
|
|
*/
|
| 906 |
|
|
if (bflags & BLIST_SPARSELUN) {
|
| 907 |
|
|
*max_dev_lun = shpnt->max_lun;
|
| 908 |
|
|
*sparse_lun = 1;
|
| 909 |
|
|
return 1;
|
| 910 |
|
|
}
|
| 911 |
|
|
/*
|
| 912 |
|
|
* If this device is known to support multiple units, override the other
|
| 913 |
|
|
* settings, and scan all of them.
|
| 914 |
|
|
*/
|
| 915 |
|
|
if (bflags & BLIST_FORCELUN) {
|
| 916 |
|
|
/*
|
| 917 |
|
|
* Scanning MAX_SCSI_LUNS units would be a bad idea.
|
| 918 |
|
|
* Any better idea?
|
| 919 |
|
|
* I think we need REPORT LUNS in future to avoid scanning
|
| 920 |
|
|
* of unused LUNs. But, that is another item.
|
| 921 |
|
|
*/
|
| 922 |
|
|
/*
|
| 923 |
|
|
if (*max_dev_lun < shpnt->max_lun)
|
| 924 |
|
|
*max_dev_lun = shpnt->max_lun;
|
| 925 |
|
|
else if ((max_scsi_luns >> 1) >= *max_dev_lun)
|
| 926 |
|
|
*max_dev_lun += shpnt->max_lun;
|
| 927 |
|
|
else *max_dev_lun = max_scsi_luns;
|
| 928 |
|
|
*/
|
| 929 |
|
|
/*
|
| 930 |
|
|
* Blech...the above code is broken. When you have a device
|
| 931 |
|
|
* that is present, and it is a FORCELUN device, then we
|
| 932 |
|
|
* need to scan *all* the luns on that device. Besides,
|
| 933 |
|
|
* skipping the scanning of LUNs is a false optimization.
|
| 934 |
|
|
* Scanning for a LUN on a present device is a very fast
|
| 935 |
|
|
* operation, it's scanning for devices that don't exist that
|
| 936 |
|
|
* is expensive and slow (although if you are truly scanning
|
| 937 |
|
|
* through MAX_SCSI_LUNS devices that would be bad, I hope
|
| 938 |
|
|
* all of the controllers out there set a reasonable value
|
| 939 |
|
|
* in shpnt->max_lun). DL
|
| 940 |
|
|
*/
|
| 941 |
|
|
*max_dev_lun = shpnt->max_lun;
|
| 942 |
|
|
return 1;
|
| 943 |
|
|
}
|
| 944 |
|
|
/*
|
| 945 |
|
|
* REGAL CDC-4X: avoid hang after LUN 4
|
| 946 |
|
|
*/
|
| 947 |
|
|
if (bflags & BLIST_MAX5LUN) {
|
| 948 |
|
|
*max_dev_lun = 5;
|
| 949 |
|
|
return 1;
|
| 950 |
|
|
}
|
| 951 |
|
|
|
| 952 |
|
|
/*
|
| 953 |
|
|
* We assume the device can't handle lun!=0 if: - it reports scsi-0
|
| 954 |
|
|
* (ANSI SCSI Revision 0) (old drives like MAXTOR XT-3280) or - it
|
| 955 |
|
|
* reports scsi-1 (ANSI SCSI Revision 1) and Response Data Format 0
|
| 956 |
|
|
*/
|
| 957 |
|
|
if (((scsi_result[2] & 0x07) == 0)
|
| 958 |
|
|
||
|
| 959 |
|
|
((scsi_result[2] & 0x07) == 1 &&
|
| 960 |
|
|
(scsi_result[3] & 0x0f) == 0))
|
| 961 |
|
|
return 0;
|
| 962 |
|
|
return 1;
|
| 963 |
|
|
}
|
| 964 |
|
|
|
| 965 |
|
|
/*
|
| 966 |
|
|
* The worker for scan_scsis.
|
| 967 |
|
|
* Returns the scsi_level of lun0 on this host, channel and dev (if already
|
| 968 |
|
|
* known), otherwise returns SCSI_2.
|
| 969 |
|
|
*/
|
| 970 |
|
|
static int find_lun0_scsi_level(unsigned int channel, unsigned int dev,
|
| 971 |
|
|
struct Scsi_Host *shpnt)
|
| 972 |
|
|
{
|
| 973 |
|
|
int res = SCSI_2;
|
| 974 |
|
|
Scsi_Device *SDpnt;
|
| 975 |
|
|
|
| 976 |
|
|
for (SDpnt = shpnt->host_queue; SDpnt; SDpnt = SDpnt->next)
|
| 977 |
|
|
{
|
| 978 |
|
|
if ((0 == SDpnt->lun) && (dev == SDpnt->id) &&
|
| 979 |
|
|
(channel == SDpnt->channel))
|
| 980 |
|
|
return (int)SDpnt->scsi_level;
|
| 981 |
|
|
}
|
| 982 |
|
|
/* haven't found lun0, should send INQUIRY but take easy route */
|
| 983 |
|
|
return res;
|
| 984 |
|
|
}
|
