| /* |
| * 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. |
| */ |
| |
| #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}, |
| |
| /* |
| * 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; |
| |
| scsi_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 ?? */ |
| } |
| } |
| } |
| } |
| 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; |
| |
| 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_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++; |
| |
| /* |
| * 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; |
| |
| /* |
| * 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; |
| scsi_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; |
| } |