2
* scsi_scan.c Copyright (C) 2000 Eric Youngdale
6
* This used to live in scsi.c, but that file was just a laundry basket
7
* full of misc stuff. This got separated out in order to make things
11
#define __NO_VERSION__
12
#include <xeno/config.h>
13
#include <xeno/module.h>
14
#include <xeno/init.h>
20
#include "constants.h"
23
#include <linux/kmod.h>
27
* Flags for irregular SCSI devices that need special treatment
29
#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 */
37
#define BLIST_ISDISK 0x100 /* Treat as (removable) disk */
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#define BLIST_ISROM 0x200 /* Treat as (removable) CD-ROM */
39
#define BLIST_LARGELUN 0x400 /* LUNs larger than 7 despite reporting as SCSI 2 */
41
static void print_inquiry(unsigned char *data);
42
static int scan_scsis_single(unsigned int channel, unsigned int dev,
43
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,
47
static int find_lun0_scsi_level(unsigned int channel, unsigned int dev,
48
struct Scsi_Host *shpnt);
53
const char *revision; /* Latest revision known to be bad. Not used yet */
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* This is what was previously known as the blacklist. The concept
59
* has been expanded so that we can specify other types of things we
60
* need to be aware of.
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static struct dev_info device_list[] =
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/* The following devices are known not to tolerate a lun != 0 scan for
65
* one reason or another. Some will respond to all luns, others will
68
{"Aashima", "IMAGERY 2400SP", "1.03", BLIST_NOLUN}, /* Locks up if polled for lun != 0 */
69
{"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
85
* 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
100
* 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.*/
105
{"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}, /* HP Va7100 Array */
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{"HP", "A6189A", "*", BLIST_SPARSELUN}, /* HP Va7400 Array */
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{"HP", "A6189B", "*", BLIST_SPARSELUN}, /* HP Va7410 Array */
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{"HP", "OPEN-", "*", BLIST_SPARSELUN}, /* HP XP Arrays */
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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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{"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 */
129
* Other types of devices that have special flags.
131
{"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},
150
{"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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{"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}, // 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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{"COMPAQ", "MSA1000", "*", BLIST_FORCELUN},
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{"HP", "C1557A", "*", BLIST_FORCELUN},
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{"IBM", "AuSaV1S2", "*", BLIST_FORCELUN},
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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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{"HITACHI", "DF600", "*", BLIST_SPARSELUN},
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* Must be at end of list...
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#define MAX_SCSI_LUNS 0xFFFFFFFF
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#ifdef CONFIG_SCSI_MULTI_LUN
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static unsigned int max_scsi_luns = MAX_SCSI_LUNS;
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static unsigned int max_scsi_luns = 1;
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MODULE_PARM(max_scsi_luns, "i");
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MODULE_PARM_DESC(max_scsi_luns, "last scsi LUN (should be between 1 and 2^32-1)");
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static int __init scsi_luns_setup(char *str)
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if (get_option(&str, &tmp) == 1) {
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printk("scsi_luns_setup : usage max_scsi_luns=n "
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"(n should be between 1 and 2^32-1)\n");
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__setup("max_scsi_luns=", scsi_luns_setup);
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static void print_inquiry(unsigned char *data)
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for (i = 8; i < 16; i++) {
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if (data[i] >= 0x20 && i < data[4] + 5)
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printk("%c", data[i]);
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for (i = 16; i < 32; i++) {
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if (data[i] >= 0x20 && i < data[4] + 5)
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printk("%c", data[i]);
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for (i = 32; i < 36; i++) {
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if (data[i] >= 0x20 && i < data[4] + 5)
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printk("%c", data[i]);
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i < MAX_SCSI_DEVICE_CODE ? scsi_device_types[i] : "Unknown ");
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printk(" ANSI SCSI revision: %02x", data[2] & 0x07);
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if ((data[2] & 0x07) == 1 && (data[3] & 0x0f) == 1)
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static int get_device_flags(unsigned char *response_data)
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for (i = 0; 1; i++) {
274
if (device_list[i].vendor == NULL)
276
pnt = &response_data[8];
277
while (*pnt && *pnt == ' ')
279
if (memcmp(device_list[i].vendor, pnt,
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strlen(device_list[i].vendor)))
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pnt = &response_data[16];
283
while (*pnt && *pnt == ' ')
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if (memcmp(device_list[i].model, pnt,
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strlen(device_list[i].model)))
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return device_list[i].flags;
294
* Detecting SCSI devices :
295
* We scan all present host adapter's busses, from ID 0 to ID (max_id).
296
* We use the INQUIRY command, determine device type, and pass the ID /
297
* lun address of all sequential devices to the tape driver, all random
298
* devices to the disk driver.
300
void scan_scsis(struct Scsi_Host *shpnt,
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unsigned int max_dev_lun;
310
unsigned char *scsi_result;
311
unsigned char scsi_result0[256];
314
unsigned int sparse_lun;
319
SDpnt = (Scsi_Device *) kmalloc(sizeof(Scsi_Device),
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memset(SDpnt, 0, sizeof(Scsi_Device));
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* Register the queue for the device. All I/O requests will
325
* come in through here. We also need to register a pointer to
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* ourselves, since the queue handler won't know what device
327
* the queue actually represents. We could look it up, but it
330
scsi_initialize_queue(SDpnt, shpnt);
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SDpnt->request_queue.queuedata = (void *) SDpnt;
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/* Make sure we have something that is valid for DMA purposes */
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scsi_result = ((!shpnt->unchecked_isa_dma)
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? &scsi_result0[0] : kmalloc(512, GFP_DMA));
337
if (scsi_result == NULL) {
338
printk("Unable to obtain scsi_result buffer\n");
342
* We must chain ourself in the host_queue, so commands can time out
344
SDpnt->queue_depth = 1;
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SDpnt->online = TRUE;
348
initialize_merge_fn(SDpnt);
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* Initialize the object that we will use to wait for command blocks.
354
init_waitqueue_head(&SDpnt->scpnt_wait);
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* Next, hook the device to the host in question.
362
if (shpnt->host_queue != NULL) {
363
SDtail = shpnt->host_queue;
364
while (SDtail->next != NULL)
365
SDtail = SDtail->next;
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SDtail->next = SDpnt;
368
SDpnt->prev = SDtail;
370
shpnt->host_queue = SDpnt;
374
* We need to increment the counter for this one device so we can track
375
* when things are quiet.
377
if (hardcoded == 1) {
378
Scsi_Device *oldSDpnt = SDpnt;
379
struct Scsi_Device_Template *sdtpnt;
381
if (channel > shpnt->max_channel)
384
if (dev >= shpnt->max_id)
387
if (lun >= shpnt->max_lun)
389
if ((0 == lun) || (lun > 7))
390
lun0_sl = SCSI_3; /* actually don't care for 0 == lun */
392
lun0_sl = find_lun0_scsi_level(channel, dev, shpnt);
393
scan_scsis_single(channel, dev, lun, lun0_sl, &max_dev_lun,
394
&sparse_lun, &SDpnt, shpnt, scsi_result);
395
if (SDpnt != oldSDpnt) {
397
/* it could happen the blockdevice hasn't yet been inited */
398
/* queue_depth() moved from scsi_proc_info() so that
399
it is called before scsi_build_commandblocks() */
400
if (shpnt->select_queue_depths != NULL)
401
(shpnt->select_queue_depths)(shpnt,
404
for (sdtpnt = scsi_devicelist; sdtpnt; sdtpnt = sdtpnt->next)
405
if (sdtpnt->init && sdtpnt->dev_noticed)
408
for (sdtpnt = scsi_devicelist; sdtpnt; sdtpnt = sdtpnt->next) {
409
if (sdtpnt->attach) {
410
(*sdtpnt->attach) (oldSDpnt);
411
if (oldSDpnt->attached) {
412
scsi_build_commandblocks(oldSDpnt);
413
if (0 == oldSDpnt->has_cmdblocks) {
414
printk("scan_scsis: DANGER, no command blocks\n");
415
/* What to do now ?? */
420
scsi_resize_dma_pool();
422
for (sdtpnt = scsi_devicelist; sdtpnt; sdtpnt = sdtpnt->next) {
423
if (sdtpnt->finish && sdtpnt->nr_dev) {
424
(*sdtpnt->finish) ();
429
/* Actual LUN. PC ordering is 0->n IBM/spec ordering is n->0 */
432
for (channel = 0; channel <= shpnt->max_channel; channel++) {
433
for (dev = 0; dev < shpnt->max_id; ++dev) {
434
if (shpnt->reverse_ordering)
435
/* Shift to scanning 15,14,13... or 7,6,5,4, */
436
order_dev = shpnt->max_id - dev - 1;
440
if (shpnt->this_id != order_dev) {
443
* We need the for so our continue, etc. work fine. We put this in
444
* a variable so that we can override it during the scan if we
445
* detect a device *KNOWN* to have multiple logical units.
447
max_dev_lun = (max_scsi_luns < shpnt->max_lun ?
448
max_scsi_luns : shpnt->max_lun);
450
for (lun = 0, lun0_sl = SCSI_2; lun < max_dev_lun; ++lun) {
451
/* don't probe further for luns > 7 for targets <= SCSI_2 */
452
if ((lun0_sl < SCSI_3) && (lun > 7))
455
if (!scan_scsis_single(channel, order_dev, lun, lun0_sl,
456
&max_dev_lun, &sparse_lun, &SDpnt, shpnt,
459
break; /* break means don't probe further for luns!=0 */
460
if (SDpnt && (0 == lun)) {
461
int bflags = get_device_flags (scsi_result);
462
if (bflags & BLIST_LARGELUN)
463
lun0_sl = SCSI_3; /* treat as SCSI 3 */
465
lun0_sl = SDpnt->scsi_level;
468
} /* if this_id != id ends */
470
} /* for channel ends */
471
} /* if/else hardcoded */
475
{ /* Unchain SRpnt from host_queue */
476
Scsi_Device *prev, *next;
479
for (dqptr = shpnt->host_queue; dqptr != SDpnt; dqptr = dqptr->next)
487
shpnt->host_queue = next;
493
/* Last device block does not exist. Free memory. */
495
blk_cleanup_queue(&SDpnt->request_queue);
496
kfree((char *) SDpnt);
499
/* If we allocated a buffer so we could do DMA, free it now */
500
if (scsi_result != &scsi_result0[0] && scsi_result != NULL) {
506
SCSI_LOG_SCAN_BUS(4, printk("Host status for host %p:\n", shpnt));
507
for (sdev = shpnt->host_queue; sdev; sdev = sdev->next) {
508
SCSI_LOG_SCAN_BUS(4, printk("Device %d %p: ", sdev->id, sdev));
509
for (scmd = sdev->device_queue; scmd; scmd = scmd->next) {
510
SCSI_LOG_SCAN_BUS(4, printk("%p ", scmd));
512
SCSI_LOG_SCAN_BUS(4, printk("\n"));
518
* The worker for scan_scsis.
519
* Returning 0 means Please don't ask further for lun!=0, 1 means OK go on.
520
* Global variables used : scsi_devices(linked list)
522
static int scan_scsis_single(unsigned int channel, unsigned int dev,
523
unsigned int lun, int lun0_scsi_level,
524
unsigned int *max_dev_lun, unsigned int *sparse_lun,
525
Scsi_Device ** SDpnt2, struct Scsi_Host *shpnt,
529
unsigned char scsi_cmd[MAX_COMMAND_SIZE];
530
struct Scsi_Device_Template *sdtpnt;
531
Scsi_Device *SDtail, *SDpnt = *SDpnt2;
532
Scsi_Request * SRpnt;
533
int bflags, type = -1;
534
#ifdef DEVFS_MUST_DIE
535
extern devfs_handle_t scsi_devfs_handle;
542
SDpnt->channel = channel;
543
SDpnt->online = TRUE;
545
scsi_build_commandblocks(SDpnt);
547
/* Some low level driver could use device->type (DB) */
551
* Assume that the device will have handshaking problems, and then fix
552
* this field later if it turns out it doesn't
555
SDpnt->was_reset = 0;
556
SDpnt->expecting_cc_ua = 0;
559
if (NULL == (SRpnt = scsi_allocate_request(SDpnt))) {
560
printk("scan_scsis_single: no memory\n");
565
* We used to do a TEST_UNIT_READY before the INQUIRY but that was
566
* not really necessary. Spec recommends using INQUIRY to scan for
567
* devices (and TEST_UNIT_READY to poll for media change). - Paul G.
570
SCSI_LOG_SCAN_BUS(3, printk("scsi: performing INQUIRY\n"));
572
* Build an INQUIRY command block.
574
scsi_cmd[0] = INQUIRY;
575
if ((lun > 0) && (lun0_scsi_level <= SCSI_2))
576
scsi_cmd[1] = (lun << 5) & 0xe0;
578
scsi_cmd[1] = 0; /* SCSI_3 and higher, don't touch */
583
SRpnt->sr_cmd_len = 0;
584
SRpnt->sr_data_direction = SCSI_DATA_READ;
586
scsi_wait_req (SRpnt, (void *) scsi_cmd,
587
(void *) scsi_result,
588
256, SCSI_TIMEOUT+4*HZ, 3);
590
SCSI_LOG_SCAN_BUS(3, printk("scsi: INQUIRY %s with code 0x%x\n",
591
SRpnt->sr_result ? "failed" : "successful", SRpnt->sr_result));
594
* Now that we don't do TEST_UNIT_READY anymore, we must be prepared
595
* for media change conditions here, so cannot require zero result.
597
if (SRpnt->sr_result) {
598
if ((driver_byte(SRpnt->sr_result) & DRIVER_SENSE) != 0 &&
599
(SRpnt->sr_sense_buffer[2] & 0xf) == UNIT_ATTENTION &&
600
SRpnt->sr_sense_buffer[12] == 0x28 &&
601
SRpnt->sr_sense_buffer[13] == 0) {
602
/* not-ready to ready transition - good */
604
/* assume no peripheral if any other sort of error */
605
scsi_release_request(SRpnt);
611
* Check for SPARSELUN before checking the peripheral qualifier,
612
* so sparse lun devices are completely scanned.
616
* Get any flags for this device.
618
bflags = get_device_flags (scsi_result);
620
if (bflags & BLIST_SPARSELUN) {
624
* Check the peripheral qualifier field - this tells us whether LUNS
625
* are supported here or not.
627
if ((scsi_result[0] >> 5) == 3) {
628
scsi_release_request(SRpnt);
629
return 0; /* assume no peripheral if any sort of error */
631
/* The Toshiba ROM was "gender-changed" here as an inline hack.
632
This is now much more generic.
633
This is a mess: What we really want is to leave the scsi_result
634
alone, and just change the SDpnt structure. And the SDpnt is what
635
we want print_inquiry to print. -- REW
637
if (bflags & BLIST_ISDISK) {
638
scsi_result[0] = TYPE_DISK;
639
scsi_result[1] |= 0x80; /* removable */
642
if (bflags & BLIST_ISROM) {
643
scsi_result[0] = TYPE_ROM;
644
scsi_result[1] |= 0x80; /* removable */
647
memcpy(SDpnt->vendor, scsi_result + 8, 8);
648
memcpy(SDpnt->model, scsi_result + 16, 16);
649
memcpy(SDpnt->rev, scsi_result + 32, 4);
651
SDpnt->removable = (0x80 & scsi_result[1]) >> 7;
652
/* Use the peripheral qualifier field to determine online/offline */
653
if (((scsi_result[0] >> 5) & 7) == 1) SDpnt->online = FALSE;
654
else SDpnt->online = TRUE;
655
SDpnt->lockable = SDpnt->removable;
657
SDpnt->access_count = 0;
659
SDpnt->has_cmdblocks = 0;
661
* Currently, all sequential devices are assumed to be tapes, all random
662
* devices disk, with the appropriate read only flags set for ROM / WORM
665
switch (type = (scsi_result[0] & 0x1f)) {
672
case TYPE_MEDIUM_CHANGER:
675
SDpnt->writeable = 1;
679
SDpnt->writeable = 0;
682
printk("scsi: unknown type %d\n", type);
685
SDpnt->device_blocked = FALSE;
686
SDpnt->device_busy = 0;
687
SDpnt->single_lun = 0;
689
(scsi_result[7] & 1) && ((scsi_result[3] & 7) == 2);
690
SDpnt->random = (type == TYPE_TAPE) ? 0 : 1;
691
SDpnt->type = (type & 0x1f);
693
print_inquiry(scsi_result);
695
sprintf (devname, "host%d/bus%d/target%d/lun%d",
696
SDpnt->host->host_no, SDpnt->channel, SDpnt->id, SDpnt->lun);
697
#ifdef DEVFS_MUST_DIE
698
if (SDpnt->de) printk ("DEBUG: dir: \"%s\" already exists\n", devname);
699
else SDpnt->de = devfs_mk_dir (scsi_devfs_handle, devname, NULL);
702
for (sdtpnt = scsi_devicelist; sdtpnt;
703
sdtpnt = sdtpnt->next)
706
(*sdtpnt->detect) (SDpnt);
708
SDpnt->scsi_level = scsi_result[2] & 0x07;
709
if (SDpnt->scsi_level >= 2 ||
710
(SDpnt->scsi_level == 1 &&
711
(scsi_result[3] & 0x0f) == 1))
713
scsi_level = SDpnt->scsi_level;
716
* Accommodate drivers that want to sleep when they should be in a polling
719
SDpnt->disconnect = 0;
723
* Set the tagged_queue flag for SCSI-II devices that purport to support
724
* tagged queuing in the INQUIRY data.
726
SDpnt->tagged_queue = 0;
727
if ((SDpnt->scsi_level >= SCSI_2) &&
728
(scsi_result[7] & 2) &&
729
!(bflags & BLIST_NOTQ)) {
730
SDpnt->tagged_supported = 1;
731
SDpnt->current_tag = 0;
734
* Some revisions of the Texel CD ROM drives have handshaking problems when
735
* used with the Seagate controllers. Before we know what type of device
736
* we're talking to, we assume it's borken and then change it here if it
737
* turns out that it isn't a TEXEL drive.
739
if ((bflags & BLIST_BORKEN) == 0)
743
* If we want to only allow I/O to one of the luns attached to this device
744
* at a time, then we set this flag.
746
if (bflags & BLIST_SINGLELUN)
747
SDpnt->single_lun = 1;
750
* These devices need this "key" to unlock the devices so we can use it
752
if ((bflags & BLIST_KEY) != 0) {
753
printk("Unlocked floptical drive.\n");
755
scsi_cmd[0] = MODE_SENSE;
756
if (shpnt->max_lun <= 8)
757
scsi_cmd[1] = (lun << 5) & 0xe0;
758
else scsi_cmd[1] = 0; /* any other idea? */
763
SRpnt->sr_cmd_len = 0;
764
SRpnt->sr_data_direction = SCSI_DATA_READ;
765
scsi_wait_req (SRpnt, (void *) scsi_cmd,
766
(void *) scsi_result, 0x2a,
770
scsi_release_request(SRpnt);
773
scsi_release_commandblocks(SDpnt);
776
* This device was already hooked up to the host in question,
777
* so at this point we just let go of it and it should be fine. We do need to
778
* allocate a new one and attach it to the host so that we can further scan the bus.
780
SDpnt = (Scsi_Device *) kmalloc(sizeof(Scsi_Device), GFP_ATOMIC);
782
printk("scsi: scan_scsis_single: Cannot malloc\n");
785
memset(SDpnt, 0, sizeof(Scsi_Device));
788
SDpnt->queue_depth = 1;
790
SDpnt->online = TRUE;
791
SDpnt->scsi_level = scsi_level;
794
* Register the queue for the device. All I/O requests will come
795
* in through here. We also need to register a pointer to
796
* ourselves, since the queue handler won't know what device
797
* the queue actually represents. We could look it up, but it
800
scsi_initialize_queue(SDpnt, shpnt);
802
initialize_merge_fn(SDpnt);
805
* Mark this device as online, or otherwise we won't be able to do much with it.
807
SDpnt->online = TRUE;
811
* Initialize the object that we will use to wait for command blocks.
813
init_waitqueue_head(&SDpnt->scpnt_wait);
817
* Since we just found one device, there had damn well better be one in the list
820
if (shpnt->host_queue == NULL)
821
panic("scan_scsis_single: Host queue == NULL\n");
823
SDtail = shpnt->host_queue;
824
while (SDtail->next) {
825
SDtail = SDtail->next;
828
/* Add this device to the linked list at the end */
829
SDtail->next = SDpnt;
830
SDpnt->prev = SDtail;
834
* Some scsi devices cannot be polled for lun != 0 due to firmware bugs
836
if (bflags & BLIST_NOLUN)
837
return 0; /* break; */
840
* If this device is known to support sparse multiple units, override the
841
* other settings, and scan all of them.
843
if (bflags & BLIST_SPARSELUN) {
844
*max_dev_lun = shpnt->max_lun;
849
* If this device is known to support multiple units, override the other
850
* settings, and scan all of them.
852
if (bflags & BLIST_FORCELUN) {
854
* Scanning MAX_SCSI_LUNS units would be a bad idea.
856
* I think we need REPORT LUNS in future to avoid scanning
857
* of unused LUNs. But, that is another item.
859
if (*max_dev_lun < shpnt->max_lun)
860
*max_dev_lun = shpnt->max_lun;
861
else if ((max_scsi_luns >> 1) >= *max_dev_lun)
862
*max_dev_lun += shpnt->max_lun;
863
else *max_dev_lun = max_scsi_luns;
867
* REGAL CDC-4X: avoid hang after LUN 4
869
if (bflags & BLIST_MAX5LUN) {
875
* We assume the device can't handle lun!=0 if: - it reports scsi-0
876
* (ANSI SCSI Revision 0) (old drives like MAXTOR XT-3280) or - it
877
* reports scsi-1 (ANSI SCSI Revision 1) and Response Data Format 0
879
if (((scsi_result[2] & 0x07) == 0)
881
((scsi_result[2] & 0x07) == 1 &&
882
(scsi_result[3] & 0x0f) == 0))
888
* The worker for scan_scsis.
889
* Returns the scsi_level of lun0 on this host, channel and dev (if already
890
* known), otherwise returns SCSI_2.
892
static int find_lun0_scsi_level(unsigned int channel, unsigned int dev,
893
struct Scsi_Host *shpnt)
898
for (SDpnt = shpnt->host_queue; SDpnt; SDpnt = SDpnt->next)
900
if ((0 == SDpnt->lun) && (dev == SDpnt->id) &&
901
(channel == SDpnt->channel))
902
return (int)SDpnt->scsi_level;
904
/* haven't found lun0, should send INQUIRY but take easy route */
added
removed
xen/drivers/scsi/scsi_scan.c
