/* * 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 #include #include #include #include "scsi.h" #include "hosts.h" #include "constants.h" #ifdef CONFIG_KMOD #include #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(int channel, int dev, int lun, int *max_scsi_dev, int *sparse_lun, Scsi_Device ** SDpnt, struct Scsi_Host *shpnt, char *scsi_result); 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}, {"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}, {"MegaRAID", "LD", "*", BLIST_FORCELUN}, /* * Must be at end of list... */ {NULL, NULL, NULL} }; #ifdef CONFIG_SCSI_MULTI_LUN static int max_scsi_luns = 8; #else static 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 8)"); #else static int __init scsi_luns_setup(char *str) { 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 8)\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; int dev; int lun; int max_dev_lun; unsigned char *scsi_result; unsigned char scsi_result0[256]; Scsi_Device *SDpnt; Scsi_Device *SDtail; int sparse_lun; 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; scan_scsis_single(channel, dev, lun, &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; lun < max_dev_lun; ++lun) { if (!scan_scsis_single(channel, order_dev, lun, &max_dev_lun, &sparse_lun, &SDpnt, shpnt, scsi_result) && !sparse_lun) break; /* break means don't probe further for luns!=0 */ } /* 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(int channel, int dev, int lun, int *max_dev_lun, 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; 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; SRpnt = scsi_allocate_request(SDpnt); /* * 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; scsi_cmd[1] = (lun << 5) & 0xe0; 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)); if (SRpnt->sr_result) { scsi_release_request(SRpnt); return 0; /* assume no peripheral if any sort of error */ } /* * 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 */ } /* * Get any flags for this device. */ bflags = get_device_flags (scsi_result); /* 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; 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_MOD: case TYPE_PROCESSOR: case TYPE_SCANNER: case TYPE_MEDIUM_CHANGER: case TYPE_ENCLOSURE: 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++; /* * 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; scsi_cmd[1] = (lun << 5) & 0xe0; 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; /* * 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 = 8; *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) { *max_dev_lun = 8; 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; }