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/*
* scsi_scan.c Copyright (C) 2000 Eric Youngdale
*
* Bus scan logic.
*
* This used to live in scsi.c, but that file was just a laundry basket
* full of misc stuff. This got separated out in order to make things
* clearer.
*/
#define __NO_VERSION__
#include <linux/config.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/blk.h>
#include "scsi.h"
#include "hosts.h"
#include "constants.h"
#ifdef CONFIG_KMOD
#include <linux/kmod.h>
#endif
/* The following devices are known not to tolerate a lun != 0 scan for
* one reason or another. Some will respond to all luns, others will
* lock up.
*/
#define BLIST_NOLUN 0x001
#define BLIST_FORCELUN 0x002
#define BLIST_BORKEN 0x004
#define BLIST_KEY 0x008
#define BLIST_SINGLELUN 0x010
#define BLIST_NOTQ 0x020
#define BLIST_SPARSELUN 0x040
#define BLIST_MAX5LUN 0x080
#define BLIST_ISDISK 0x100
#define BLIST_ISROM 0x200
static void print_inquiry(unsigned char *data);
static int scan_scsis_single(unsigned int channel, unsigned int dev,
unsigned int lun, int lun0_scsi_level,
unsigned int *max_scsi_dev, unsigned int *sparse_lun,
Scsi_Device ** SDpnt, struct Scsi_Host *shpnt,
char *scsi_result);
static int find_lun0_scsi_level(unsigned int channel, unsigned int dev,
struct Scsi_Host *shpnt);
struct dev_info {
const char *vendor;
const char *model;
const char *revision; /* Latest revision known to be bad. Not used yet */
unsigned flags;
};
/*
* This is what was previously known as the blacklist. The concept
* has been expanded so that we can specify other types of things we
* need to be aware of.
*/
static struct dev_info device_list[] =
{
{"Aashima", "IMAGERY 2400SP", "1.03", BLIST_NOLUN}, /* Locks up if polled for lun != 0 */
{"CHINON", "CD-ROM CDS-431", "H42", BLIST_NOLUN}, /* Locks up if polled for lun != 0 */
{"CHINON", "CD-ROM CDS-535", "Q14", BLIST_NOLUN}, /* Locks up if polled for lun != 0 */
{"DENON", "DRD-25X", "V", BLIST_NOLUN}, /* Locks up if probed for lun != 0 */
{"HITACHI", "DK312C", "CM81", BLIST_NOLUN}, /* Responds to all lun - dtg */
{"HITACHI", "DK314C", "CR21", BLIST_NOLUN}, /* responds to all lun */
{"IMS", "CDD521/10", "2.06", BLIST_NOLUN}, /* Locks-up when LUN>0 polled. */
{"MAXTOR", "XT-3280", "PR02", BLIST_NOLUN}, /* Locks-up when LUN>0 polled. */
{"MAXTOR", "XT-4380S", "B3C", BLIST_NOLUN}, /* Locks-up when LUN>0 polled. */
{"MAXTOR", "MXT-1240S", "I1.2", BLIST_NOLUN}, /* Locks up when LUN>0 polled */
{"MAXTOR", "XT-4170S", "B5A", BLIST_NOLUN}, /* Locks-up sometimes when LUN>0 polled. */
{"MAXTOR", "XT-8760S", "B7B", BLIST_NOLUN}, /* guess what? */
{"MEDIAVIS", "RENO CD-ROMX2A", "2.03", BLIST_NOLUN}, /*Responds to all lun */
{"MICROP", "4110", "*", BLIST_NOTQ}, /* Buggy Tagged Queuing */
{"NEC", "CD-ROM DRIVE:841", "1.0", BLIST_NOLUN}, /* Locks-up when LUN>0 polled. */
{"PHILIPS", "PCA80SC", "V4-2", BLIST_NOLUN}, /* Responds to all lun */
{"RODIME", "RO3000S", "2.33", BLIST_NOLUN}, /* Locks up if polled for lun != 0 */
{"SANYO", "CRD-250S", "1.20", BLIST_NOLUN}, /* causes failed REQUEST SENSE on lun 1
* for aha152x controller, which causes
* SCSI code to reset bus.*/
{"SEAGATE", "ST157N", "\004|j", BLIST_NOLUN}, /* causes failed REQUEST SENSE on lun 1
* for aha152x controller, which causes
* SCSI code to reset bus.*/
{"SEAGATE", "ST296", "921", BLIST_NOLUN}, /* Responds to all lun */
{"SEAGATE", "ST1581", "6538", BLIST_NOLUN}, /* Responds to all lun */
{"SONY", "CD-ROM CDU-541", "4.3d", BLIST_NOLUN},
{"SONY", "CD-ROM CDU-55S", "1.0i", BLIST_NOLUN},
{"SONY", "CD-ROM CDU-561", "1.7x", BLIST_NOLUN},
{"SONY", "CD-ROM CDU-8012", "*", BLIST_NOLUN},
{"TANDBERG", "TDC 3600", "U07", BLIST_NOLUN}, /* Locks up if polled for lun != 0 */
{"TEAC", "CD-R55S", "1.0H", BLIST_NOLUN}, /* Locks up if polled for lun != 0 */
{"TEAC", "CD-ROM", "1.06", BLIST_NOLUN}, /* causes failed REQUEST SENSE on lun 1
* for seagate controller, which causes
* SCSI code to reset bus.*/
{"TEAC", "MT-2ST/45S2-27", "RV M", BLIST_NOLUN}, /* Responds to all lun */
{"TEXEL", "CD-ROM", "1.06", BLIST_NOLUN}, /* causes failed REQUEST SENSE on lun 1
* for seagate controller, which causes
* SCSI code to reset bus.*/
{"QUANTUM", "LPS525S", "3110", BLIST_NOLUN}, /* Locks sometimes if polled for lun != 0 */
{"QUANTUM", "PD1225S", "3110", BLIST_NOLUN}, /* Locks sometimes if polled for lun != 0 */
{"QUANTUM", "FIREBALL ST4.3S", "0F0C", BLIST_NOLUN}, /* Locks up when polled for lun != 0 */
{"MEDIAVIS", "CDR-H93MV", "1.31", BLIST_NOLUN}, /* Locks up if polled for lun != 0 */
{"SANKYO", "CP525", "6.64", BLIST_NOLUN}, /* causes failed REQ SENSE, extra reset */
{"HP", "C1750A", "3226", BLIST_NOLUN}, /* scanjet iic */
{"HP", "C1790A", "", BLIST_NOLUN}, /* scanjet iip */
{"HP", "C2500A", "", BLIST_NOLUN}, /* scanjet iicx */
{"YAMAHA", "CDR100", "1.00", BLIST_NOLUN}, /* Locks up if polled for lun != 0 */
{"YAMAHA", "CDR102", "1.00", BLIST_NOLUN}, /* Locks up if polled for lun != 0
* extra reset */
{"YAMAHA", "CRW8424S", "1.0", BLIST_NOLUN}, /* Locks up if polled for lun != 0 */
{"YAMAHA", "CRW6416S", "1.0c", BLIST_NOLUN}, /* Locks up if polled for lun != 0 */
{"MITSUMI", "CD-R CR-2201CS", "6119", BLIST_NOLUN}, /* Locks up if polled for lun != 0 */
{"RELISYS", "Scorpio", "*", BLIST_NOLUN}, /* responds to all LUN */
{"MICROTEK", "ScanMaker II", "5.61", BLIST_NOLUN}, /* responds to all LUN */
/*
* Other types of devices that have special flags.
*/
{"SONY", "CD-ROM CDU-8001", "*", BLIST_BORKEN},
{"TEXEL", "CD-ROM", "1.06", BLIST_BORKEN},
{"IOMEGA", "Io20S *F", "*", BLIST_KEY},
{"INSITE", "Floptical F*8I", "*", BLIST_KEY},
{"INSITE", "I325VM", "*", BLIST_KEY},
{"LASOUND","CDX7405","3.10", BLIST_MAX5LUN | BLIST_SINGLELUN},
{"NRC", "MBR-7", "*", BLIST_FORCELUN | BLIST_SINGLELUN},
{"NRC", "MBR-7.4", "*", BLIST_FORCELUN | BLIST_SINGLELUN},
{"REGAL", "CDC-4X", "*", BLIST_MAX5LUN | BLIST_SINGLELUN},
{"NAKAMICH", "MJ-4.8S", "*", BLIST_FORCELUN | BLIST_SINGLELUN},
{"NAKAMICH", "MJ-5.16S", "*", BLIST_FORCELUN | BLIST_SINGLELUN},
{"PIONEER", "CD-ROM DRM-600", "*", BLIST_FORCELUN | BLIST_SINGLELUN},
{"PIONEER", "CD-ROM DRM-602X", "*", BLIST_FORCELUN | BLIST_SINGLELUN},
{"PIONEER", "CD-ROM DRM-604X", "*", BLIST_FORCELUN | BLIST_SINGLELUN},
{"EMULEX", "MD21/S2 ESDI", "*", BLIST_SINGLELUN},
{"CANON", "IPUBJD", "*", BLIST_SPARSELUN},
{"nCipher", "Fastness Crypto", "*", BLIST_FORCELUN},
{"DEC","HSG80","*", BLIST_FORCELUN},
{"COMPAQ","LOGICAL VOLUME","*", BLIST_FORCELUN},
{"COMPAQ","CR3500","*", BLIST_FORCELUN},
{"NEC", "PD-1 ODX654P", "*", BLIST_FORCELUN | BLIST_SINGLELUN},
{"MATSHITA", "PD-1", "*", BLIST_FORCELUN | BLIST_SINGLELUN},
{"iomega", "jaz 1GB", "J.86", BLIST_NOTQ | BLIST_NOLUN},
{"TOSHIBA","CDROM","*", BLIST_ISROM},
{"TOSHIBA","CD-ROM","*", BLIST_ISROM},
{"MegaRAID", "LD", "*", BLIST_FORCELUN},
{"DGC", "RAID", "*", BLIST_SPARSELUN}, // Dell PV 650F (tgt @ LUN 0)
{"DGC", "DISK", "*", BLIST_SPARSELUN}, // Dell PV 650F (no tgt @ LUN 0)
{"DELL", "PV660F", "*", BLIST_SPARSELUN},
{"DELL", "PV660F PSEUDO", "*", BLIST_SPARSELUN},
{"DELL", "PSEUDO DEVICE .", "*", BLIST_SPARSELUN}, // Dell PV 530F
{"DELL", "PV530F", "*", BLIST_SPARSELUN}, // Dell PV 530F
{"EMC", "SYMMETRIX", "*", BLIST_SPARSELUN},
{"CMD", "CRA-7280", "*", BLIST_SPARSELUN}, // CMD RAID Controller
{"CNSI", "G7324", "*", BLIST_SPARSELUN}, // Chaparral G7324 RAID
{"CNSi", "G8324", "*", BLIST_SPARSELUN}, // Chaparral G8324 RAID
{"Zzyzx", "RocketStor 500S", "*", BLIST_SPARSELUN},
{"Zzyzx", "RocketStor 2000", "*", BLIST_SPARSELUN},
{"SONY", "TSL", "*", BLIST_FORCELUN}, // DDS3 & DDS4 autoloaders
{"DELL", "PERCRAID", "*", BLIST_FORCELUN},
{"HP", "NetRAID-4M", "*", BLIST_FORCELUN},
{"ADAPTEC", "AACRAID", "*", BLIST_FORCELUN},
{"ADAPTEC", "Adaptec 5400S", "*", BLIST_FORCELUN},
{"COMPAQ", "MSA1000", "*", BLIST_FORCELUN},
/*
* Must be at end of list...
*/
{NULL, NULL, NULL}
};
#define MAX_SCSI_LUNS 0xFFFFFFFF
#ifdef CONFIG_SCSI_MULTI_LUN
static unsigned int max_scsi_luns = MAX_SCSI_LUNS;
#else
static unsigned int max_scsi_luns = 1;
#endif
#ifdef MODULE
MODULE_PARM(max_scsi_luns, "i");
MODULE_PARM_DESC(max_scsi_luns, "last scsi LUN (should be between 1 and 2^32-1)");
#else
static int __init scsi_luns_setup(char *str)
{
unsigned int tmp;
if (get_option(&str, &tmp) == 1) {
max_scsi_luns = tmp;
return 1;
} else {
printk("scsi_luns_setup : usage max_scsi_luns=n "
"(n should be between 1 and 2^32-1)\n");
return 0;
}
}
__setup("max_scsi_luns=", scsi_luns_setup);
#endif
static void print_inquiry(unsigned char *data)
{
int i;
printk(" Vendor: ");
for (i = 8; i < 16; i++) {
if (data[i] >= 0x20 && i < data[4] + 5)
printk("%c", data[i]);
else
printk(" ");
}
printk(" Model: ");
for (i = 16; i < 32; i++) {
if (data[i] >= 0x20 && i < data[4] + 5)
printk("%c", data[i]);
else
printk(" ");
}
printk(" Rev: ");
for (i = 32; i < 36; i++) {
if (data[i] >= 0x20 && i < data[4] + 5)
printk("%c", data[i]);
else
printk(" ");
}
printk("\n");
i = data[0] & 0x1f;
printk(" Type: %s ",
i < MAX_SCSI_DEVICE_CODE ? scsi_device_types[i] : "Unknown ");
printk(" ANSI SCSI revision: %02x", data[2] & 0x07);
if ((data[2] & 0x07) == 1 && (data[3] & 0x0f) == 1)
printk(" CCS\n");
else
printk("\n");
}
static int get_device_flags(unsigned char *response_data)
{
int i = 0;
unsigned char *pnt;
for (i = 0; 1; i++) {
if (device_list[i].vendor == NULL)
return 0;
pnt = &response_data[8];
while (*pnt && *pnt == ' ')
pnt++;
if (memcmp(device_list[i].vendor, pnt,
strlen(device_list[i].vendor)))
continue;
pnt = &response_data[16];
while (*pnt && *pnt == ' ')
pnt++;
if (memcmp(device_list[i].model, pnt,
strlen(device_list[i].model)))
continue;
return device_list[i].flags;
}
return 0;
}
/*
* Detecting SCSI devices :
* We scan all present host adapter's busses, from ID 0 to ID (max_id).
* We use the INQUIRY command, determine device type, and pass the ID /
* lun address of all sequential devices to the tape driver, all random
* devices to the disk driver.
*/
void scan_scsis(struct Scsi_Host *shpnt,
uint hardcoded,
uint hchannel,
uint hid,
uint hlun)
{
uint channel;
unsigned int dev;
unsigned int lun;
unsigned int max_dev_lun;
unsigned char *scsi_result;
unsigned char scsi_result0[256];
Scsi_Device *SDpnt;
Scsi_Device *SDtail;
unsigned int sparse_lun;
int lun0_sl;
scsi_result = NULL;
SDpnt = (Scsi_Device *) kmalloc(sizeof(Scsi_Device),
GFP_ATOMIC);
if (SDpnt) {
memset(SDpnt, 0, sizeof(Scsi_Device));
/*
* Register the queue for the device. All I/O requests will
* come in through here. We also need to register a pointer to
* ourselves, since the queue handler won't know what device
* the queue actually represents. We could look it up, but it
* is pointless work.
*/
scsi_initialize_queue(SDpnt, shpnt);
SDpnt->request_queue.queuedata = (void *) SDpnt;
/* Make sure we have something that is valid for DMA purposes */
scsi_result = ((!shpnt->unchecked_isa_dma)
? &scsi_result0[0] : kmalloc(512, GFP_DMA));
}
if (scsi_result == NULL) {
printk("Unable to obtain scsi_result buffer\n");
goto leave;
}
/*
* We must chain ourself in the host_queue, so commands can time out
*/
SDpnt->queue_depth = 1;
SDpnt->host = shpnt;
SDpnt->online = TRUE;
initialize_merge_fn(SDpnt);
/*
* Initialize the object that we will use to wait for command blocks.
*/
init_waitqueue_head(&SDpnt->scpnt_wait);
/*
* Next, hook the device to the host in question.
*/
SDpnt->prev = NULL;
SDpnt->next = NULL;
if (shpnt->host_queue != NULL) {
SDtail = shpnt->host_queue;
while (SDtail->next != NULL)
SDtail = SDtail->next;
SDtail->next = SDpnt;
SDpnt->prev = SDtail;
} else {
shpnt->host_queue = SDpnt;
}
/*
* We need to increment the counter for this one device so we can track
* when things are quiet.
*/
if (hardcoded == 1) {
Scsi_Device *oldSDpnt = SDpnt;
struct Scsi_Device_Template *sdtpnt;
channel = hchannel;
if (channel > shpnt->max_channel)
goto leave;
dev = hid;
if (dev >= shpnt->max_id)
goto leave;
lun = hlun;
if (lun >= shpnt->max_lun)
goto leave;
if ((0 == lun) || (lun > 7))
lun0_sl = SCSI_3; /* actually don't care for 0 == lun */
else
lun0_sl = find_lun0_scsi_level(channel, dev, shpnt);
scan_scsis_single(channel, dev, lun, lun0_sl, &max_dev_lun,
&sparse_lun, &SDpnt, shpnt, scsi_result);
if (SDpnt != oldSDpnt) {
/* it could happen the blockdevice hasn't yet been inited */
/* queue_depth() moved from scsi_proc_info() so that
it is called before scsi_build_commandblocks() */
if (shpnt->select_queue_depths != NULL)
(shpnt->select_queue_depths)(shpnt,
shpnt->host_queue);
for (sdtpnt = scsi_devicelist; sdtpnt; sdtpnt = sdtpnt->next)
if (sdtpnt->init && sdtpnt->dev_noticed)
(*sdtpnt->init) ();
for (sdtpnt = scsi_devicelist; sdtpnt; sdtpnt = sdtpnt->next) {
if (sdtpnt->attach) {
(*sdtpnt->attach) (oldSDpnt);
if (oldSDpnt->attached) {
scsi_build_commandblocks(oldSDpnt);
if (0 == oldSDpnt->has_cmdblocks) {
printk("scan_scsis: DANGER, no command blocks\n");
/* What to do now ?? */
}
}
}
}
scsi_resize_dma_pool();
for (sdtpnt = scsi_devicelist; sdtpnt; sdtpnt = sdtpnt->next) {
if (sdtpnt->finish && sdtpnt->nr_dev) {
(*sdtpnt->finish) ();
}
}
}
} else {
/* Actual LUN. PC ordering is 0->n IBM/spec ordering is n->0 */
int order_dev;
for (channel = 0; channel <= shpnt->max_channel; channel++) {
for (dev = 0; dev < shpnt->max_id; ++dev) {
if (shpnt->reverse_ordering)
/* Shift to scanning 15,14,13... or 7,6,5,4, */
order_dev = shpnt->max_id - dev - 1;
else
order_dev = dev;
if (shpnt->this_id != order_dev) {
/*
* We need the for so our continue, etc. work fine. We put this in
* a variable so that we can override it during the scan if we
* detect a device *KNOWN* to have multiple logical units.
*/
max_dev_lun = (max_scsi_luns < shpnt->max_lun ?
max_scsi_luns : shpnt->max_lun);
sparse_lun = 0;
for (lun = 0, lun0_sl = SCSI_2; lun < max_dev_lun; ++lun) {
/* don't probe further for luns > 7 for targets <= SCSI_2 */
if ((lun0_sl < SCSI_3) && (lun > 7))
break;
if (!scan_scsis_single(channel, order_dev, lun, lun0_sl,
&max_dev_lun, &sparse_lun, &SDpnt, shpnt,
scsi_result)
&& !sparse_lun)
break; /* break means don't probe further for luns!=0 */
if (SDpnt && (0 == lun))
lun0_sl = SDpnt->scsi_level;
} /* for lun ends */
} /* if this_id != id ends */
} /* for dev ends */
} /* for channel ends */
} /* if/else hardcoded */
leave:
{ /* Unchain SRpnt from host_queue */
Scsi_Device *prev, *next;
Scsi_Device *dqptr;
for (dqptr = shpnt->host_queue; dqptr != SDpnt; dqptr = dqptr->next)
continue;
if (dqptr) {
prev = dqptr->prev;
next = dqptr->next;
if (prev)
prev->next = next;
else
shpnt->host_queue = next;
if (next)
next->prev = prev;
}
}
/* Last device block does not exist. Free memory. */
if (SDpnt != NULL) {
blk_cleanup_queue(&SDpnt->request_queue);
kfree((char *) SDpnt);
}
/* If we allocated a buffer so we could do DMA, free it now */
if (scsi_result != &scsi_result0[0] && scsi_result != NULL) {
kfree(scsi_result);
} {
Scsi_Device *sdev;
Scsi_Cmnd *scmd;
SCSI_LOG_SCAN_BUS(4, printk("Host status for host %p:\n", shpnt));
for (sdev = shpnt->host_queue; sdev; sdev = sdev->next) {
SCSI_LOG_SCAN_BUS(4, printk("Device %d %p: ", sdev->id, sdev));
for (scmd = sdev->device_queue; scmd; scmd = scmd->next) {
SCSI_LOG_SCAN_BUS(4, printk("%p ", scmd));
}
SCSI_LOG_SCAN_BUS(4, printk("\n"));
}
}
}
/*
* The worker for scan_scsis.
* Returning 0 means Please don't ask further for lun!=0, 1 means OK go on.
* Global variables used : scsi_devices(linked list)
*/
static int scan_scsis_single(unsigned int channel, unsigned int dev,
unsigned int lun, int lun0_scsi_level,
unsigned int *max_dev_lun, unsigned int *sparse_lun,
Scsi_Device ** SDpnt2, struct Scsi_Host *shpnt,
char *scsi_result)
{
char devname[64];
unsigned char scsi_cmd[MAX_COMMAND_SIZE];
struct Scsi_Device_Template *sdtpnt;
Scsi_Device *SDtail, *SDpnt = *SDpnt2;
Scsi_Request * SRpnt;
int bflags, type = -1;
extern devfs_handle_t scsi_devfs_handle;
int scsi_level;
SDpnt->host = shpnt;
SDpnt->id = dev;
SDpnt->lun = lun;
SDpnt->channel = channel;
SDpnt->online = TRUE;
scsi_build_commandblocks(SDpnt);
/* Some low level driver could use device->type (DB) */
SDpnt->type = -1;
/*
* Assume that the device will have handshaking problems, and then fix
* this field later if it turns out it doesn't
*/
SDpnt->borken = 1;
SDpnt->was_reset = 0;
SDpnt->expecting_cc_ua = 0;
SDpnt->starved = 0;
if (NULL == (SRpnt = scsi_allocate_request(SDpnt))) {
printk("scan_scsis_single: no memory\n");
return 0;
}
/*
* We used to do a TEST_UNIT_READY before the INQUIRY but that was
* not really necessary. Spec recommends using INQUIRY to scan for
* devices (and TEST_UNIT_READY to poll for media change). - Paul G.
*/
SCSI_LOG_SCAN_BUS(3, printk("scsi: performing INQUIRY\n"));
/*
* Build an INQUIRY command block.
*/
scsi_cmd[0] = INQUIRY;
if ((lun > 0) && (lun0_scsi_level <= SCSI_2))
scsi_cmd[1] = (lun << 5) & 0xe0;
else
scsi_cmd[1] = 0; /* SCSI_3 and higher, don't touch */
scsi_cmd[2] = 0;
scsi_cmd[3] = 0;
scsi_cmd[4] = 255;
scsi_cmd[5] = 0;
SRpnt->sr_cmd_len = 0;
SRpnt->sr_data_direction = SCSI_DATA_READ;
scsi_wait_req (SRpnt, (void *) scsi_cmd,
(void *) scsi_result,
256, SCSI_TIMEOUT+4*HZ, 3);
SCSI_LOG_SCAN_BUS(3, printk("scsi: INQUIRY %s with code 0x%x\n",
SRpnt->sr_result ? "failed" : "successful", SRpnt->sr_result));
/*
* Now that we don't do TEST_UNIT_READY anymore, we must be prepared
* for media change conditions here, so cannot require zero result.
*/
if (SRpnt->sr_result) {
if ((driver_byte(SRpnt->sr_result) & DRIVER_SENSE) != 0 &&
(SRpnt->sr_sense_buffer[2] & 0xf) == UNIT_ATTENTION &&
SRpnt->sr_sense_buffer[12] == 0x28 &&
SRpnt->sr_sense_buffer[13] == 0) {
/* not-ready to ready transition - good */
} else {
/* assume no peripheral if any other sort of error */
scsi_release_request(SRpnt);
return 0;
}
}
/*
* Check for SPARSELUN before checking the peripheral qualifier,
* so sparse lun devices are completely scanned.
*/
/*
* Get any flags for this device.
*/
bflags = get_device_flags (scsi_result);
if (bflags & BLIST_SPARSELUN) {
*sparse_lun = 1;
}
/*
* Check the peripheral qualifier field - this tells us whether LUNS
* are supported here or not.
*/
if ((scsi_result[0] >> 5) == 3) {
scsi_release_request(SRpnt);
return 0; /* assume no peripheral if any sort of error */
}
/* The Toshiba ROM was "gender-changed" here as an inline hack.
This is now much more generic.
This is a mess: What we really want is to leave the scsi_result
alone, and just change the SDpnt structure. And the SDpnt is what
we want print_inquiry to print. -- REW
*/
if (bflags & BLIST_ISDISK) {
scsi_result[0] = TYPE_DISK;
scsi_result[1] |= 0x80; /* removable */
}
if (bflags & BLIST_ISROM) {
scsi_result[0] = TYPE_ROM;
scsi_result[1] |= 0x80; /* removable */
}
memcpy(SDpnt->vendor, scsi_result + 8, 8);
memcpy(SDpnt->model, scsi_result + 16, 16);
memcpy(SDpnt->rev, scsi_result + 32, 4);
SDpnt->removable = (0x80 & scsi_result[1]) >> 7;
/* Use the peripheral qualifier field to determine online/offline */
if (((scsi_result[0] >> 5) & 7) == 1) SDpnt->online = FALSE;
else SDpnt->online = TRUE;
SDpnt->lockable = SDpnt->removable;
SDpnt->changed = 0;
SDpnt->access_count = 0;
SDpnt->busy = 0;
SDpnt->has_cmdblocks = 0;
/*
* Currently, all sequential devices are assumed to be tapes, all random
* devices disk, with the appropriate read only flags set for ROM / WORM
* treated as RO.
*/
switch (type = (scsi_result[0] & 0x1f)) {
case TYPE_TAPE:
case TYPE_DISK:
case TYPE_PRINTER:
case TYPE_MOD:
case TYPE_PROCESSOR:
case TYPE_SCANNER:
case TYPE_MEDIUM_CHANGER:
case TYPE_ENCLOSURE:
case TYPE_COMM:
SDpnt->writeable = 1;
break;
case TYPE_WORM:
case TYPE_ROM:
SDpnt->writeable = 0;
break;
default:
printk("scsi: unknown type %d\n", type);
}
SDpnt->device_blocked = FALSE;
SDpnt->device_busy = 0;
SDpnt->single_lun = 0;
SDpnt->soft_reset =
(scsi_result[7] & 1) && ((scsi_result[3] & 7) == 2);
SDpnt->random = (type == TYPE_TAPE) ? 0 : 1;
SDpnt->type = (type & 0x1f);
print_inquiry(scsi_result);
sprintf (devname, "host%d/bus%d/target%d/lun%d",
SDpnt->host->host_no, SDpnt->channel, SDpnt->id, SDpnt->lun);
if (SDpnt->de) printk ("DEBUG: dir: \"%s\" already exists\n", devname);
else SDpnt->de = devfs_mk_dir (scsi_devfs_handle, devname, NULL);
for (sdtpnt = scsi_devicelist; sdtpnt;
sdtpnt = sdtpnt->next)
if (sdtpnt->detect)
SDpnt->attached +=
(*sdtpnt->detect) (SDpnt);
SDpnt->scsi_level = scsi_result[2] & 0x07;
if (SDpnt->scsi_level >= 2 ||
(SDpnt->scsi_level == 1 &&
(scsi_result[3] & 0x0f) == 1))
SDpnt->scsi_level++;
scsi_level = SDpnt->scsi_level;
/*
* Accommodate drivers that want to sleep when they should be in a polling
* loop.
*/
SDpnt->disconnect = 0;
/*
* Set the tagged_queue flag for SCSI-II devices that purport to support
* tagged queuing in the INQUIRY data.
*/
SDpnt->tagged_queue = 0;
if ((SDpnt->scsi_level >= SCSI_2) &&
(scsi_result[7] & 2) &&
!(bflags & BLIST_NOTQ)) {
SDpnt->tagged_supported = 1;
SDpnt->current_tag = 0;
}
/*
* Some revisions of the Texel CD ROM drives have handshaking problems when
* used with the Seagate controllers. Before we know what type of device
* we're talking to, we assume it's borken and then change it here if it
* turns out that it isn't a TEXEL drive.
*/
if ((bflags & BLIST_BORKEN) == 0)
SDpnt->borken = 0;
/*
* If we want to only allow I/O to one of the luns attached to this device
* at a time, then we set this flag.
*/
if (bflags & BLIST_SINGLELUN)
SDpnt->single_lun = 1;
/*
* These devices need this "key" to unlock the devices so we can use it
*/
if ((bflags & BLIST_KEY) != 0) {
printk("Unlocked floptical drive.\n");
SDpnt->lockable = 0;
scsi_cmd[0] = MODE_SENSE;
if (shpnt->max_lun <= 8)
scsi_cmd[1] = (lun << 5) & 0xe0;
else scsi_cmd[1] = 0; /* any other idea? */
scsi_cmd[2] = 0x2e;
scsi_cmd[3] = 0;
scsi_cmd[4] = 0x2a;
scsi_cmd[5] = 0;
SRpnt->sr_cmd_len = 0;
SRpnt->sr_data_direction = SCSI_DATA_READ;
scsi_wait_req (SRpnt, (void *) scsi_cmd,
(void *) scsi_result, 0x2a,
SCSI_TIMEOUT, 3);
}
scsi_release_request(SRpnt);
SRpnt = NULL;
scsi_release_commandblocks(SDpnt);
/*
* This device was already hooked up to the host in question,
* so at this point we just let go of it and it should be fine. We do need to
* allocate a new one and attach it to the host so that we can further scan the bus.
*/
SDpnt = (Scsi_Device *) kmalloc(sizeof(Scsi_Device), GFP_ATOMIC);
if (!SDpnt) {
printk("scsi: scan_scsis_single: Cannot malloc\n");
return 0;
}
memset(SDpnt, 0, sizeof(Scsi_Device));
*SDpnt2 = SDpnt;
SDpnt->queue_depth = 1;
SDpnt->host = shpnt;
SDpnt->online = TRUE;
SDpnt->scsi_level = scsi_level;
/*
* Register the queue for the device. All I/O requests will come
* in through here. We also need to register a pointer to
* ourselves, since the queue handler won't know what device
* the queue actually represents. We could look it up, but it
* is pointless work.
*/
scsi_initialize_queue(SDpnt, shpnt);
SDpnt->host = shpnt;
initialize_merge_fn(SDpnt);
/*
* Mark this device as online, or otherwise we won't be able to do much with it.
*/
SDpnt->online = TRUE;
/*
* Initialize the object that we will use to wait for command blocks.
*/
init_waitqueue_head(&SDpnt->scpnt_wait);
/*
* Since we just found one device, there had damn well better be one in the list
* already.
*/
if (shpnt->host_queue == NULL)
panic("scan_scsis_single: Host queue == NULL\n");
SDtail = shpnt->host_queue;
while (SDtail->next) {
SDtail = SDtail->next;
}
/* Add this device to the linked list at the end */
SDtail->next = SDpnt;
SDpnt->prev = SDtail;
SDpnt->next = NULL;
/*
* Some scsi devices cannot be polled for lun != 0 due to firmware bugs
*/
if (bflags & BLIST_NOLUN)
return 0; /* break; */
/*
* If this device is known to support sparse multiple units, override the
* other settings, and scan all of them.
*/
if (bflags & BLIST_SPARSELUN) {
*max_dev_lun = shpnt->max_lun;
*sparse_lun = 1;
return 1;
}
/*
* If this device is known to support multiple units, override the other
* settings, and scan all of them.
*/
if (bflags & BLIST_FORCELUN) {
/*
* Scanning MAX_SCSI_LUNS units would be a bad idea.
* Any better idea?
* I think we need REPORT LUNS in future to avoid scanning
* of unused LUNs. But, that is another item.
*/
if (*max_dev_lun < shpnt->max_lun)
*max_dev_lun = shpnt->max_lun;
else if ((max_scsi_luns >> 1) >= *max_dev_lun)
*max_dev_lun += shpnt->max_lun;
else *max_dev_lun = max_scsi_luns;
return 1;
}
/*
* REGAL CDC-4X: avoid hang after LUN 4
*/
if (bflags & BLIST_MAX5LUN) {
*max_dev_lun = 5;
return 1;
}
/*
* We assume the device can't handle lun!=0 if: - it reports scsi-0
* (ANSI SCSI Revision 0) (old drives like MAXTOR XT-3280) or - it
* reports scsi-1 (ANSI SCSI Revision 1) and Response Data Format 0
*/
if (((scsi_result[2] & 0x07) == 0)
||
((scsi_result[2] & 0x07) == 1 &&
(scsi_result[3] & 0x0f) == 0))
return 0;
return 1;
}
/*
* The worker for scan_scsis.
* Returns the scsi_level of lun0 on this host, channel and dev (if already
* known), otherwise returns SCSI_2.
*/
static int find_lun0_scsi_level(unsigned int channel, unsigned int dev,
struct Scsi_Host *shpnt)
{
int res = SCSI_2;
Scsi_Device *SDpnt;
for (SDpnt = shpnt->host_queue; SDpnt; SDpnt = SDpnt->next)
{
if ((0 == SDpnt->lun) && (dev == SDpnt->id) &&
(channel == SDpnt->channel))
return (int)SDpnt->scsi_level;
}
/* haven't found lun0, should send INQUIRY but take easy route */
return res;
}
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