/* fcal.c: Fibre Channel Arbitrated Loop SCSI host adapter driver. * * Copyright (C) 1998,1999 Jakub Jelinek (jj@ultra.linux.cz) * */ #include <linux/kernel.h> #include <linux/delay.h> #include <linux/types.h> #include <linux/string.h> #include <linux/slab.h> #include <linux/blkdev.h> #include <linux/proc_fs.h> #include <linux/stat.h> #include <linux/init.h> #include <linux/config.h> #ifdef CONFIG_KMOD #include <linux/kmod.h> #endif #include <asm/irq.h> #include "scsi.h" #include <scsi/scsi_host.h> #include "../fc4/fcp_impl.h" #include "fcal.h" #include <linux/module.h> /* #define FCAL_DEBUG */ #define fcal_printk printk ("FCAL %s: ", fc->name); printk #ifdef FCAL_DEBUG #define FCALD(x) fcal_printk x; #define FCALND(x) printk ("FCAL: "); printk x; #else #define FCALD(x) #define FCALND(x) #endif static unsigned char alpa2target[] = { 0x7e, 0x7d, 0x7c, 0xff, 0x7b, 0xff, 0xff, 0xff, 0x7a, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x79, 0x78, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x77, 0x76, 0xff, 0xff, 0x75, 0xff, 0x74, 0x73, 0x72, 0xff, 0xff, 0xff, 0x71, 0xff, 0x70, 0x6f, 0x6e, 0xff, 0x6d, 0x6c, 0x6b, 0x6a, 0x69, 0x68, 0xff, 0xff, 0x67, 0x66, 0x65, 0x64, 0x63, 0x62, 0xff, 0xff, 0x61, 0x60, 0xff, 0x5f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x5e, 0xff, 0x5d, 0x5c, 0x5b, 0xff, 0x5a, 0x59, 0x58, 0x57, 0x56, 0x55, 0xff, 0xff, 0x54, 0x53, 0x52, 0x51, 0x50, 0x4f, 0xff, 0xff, 0x4e, 0x4d, 0xff, 0x4c, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x4b, 0xff, 0x4a, 0x49, 0x48, 0xff, 0x47, 0x46, 0x45, 0x44, 0x43, 0x42, 0xff, 0xff, 0x41, 0x40, 0x3f, 0x3e, 0x3d, 0x3c, 0xff, 0xff, 0x3b, 0x3a, 0xff, 0x39, 0xff, 0xff, 0xff, 0x38, 0x37, 0x36, 0xff, 0x35, 0xff, 0xff, 0xff, 0x34, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x33, 0x32, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x31, 0x30, 0xff, 0xff, 0x2f, 0xff, 0x2e, 0x2d, 0x2c, 0xff, 0xff, 0xff, 0x2b, 0xff, 0x2a, 0x29, 0x28, 0xff, 0x27, 0x26, 0x25, 0x24, 0x23, 0x22, 0xff, 0xff, 0x21, 0x20, 0x1f, 0x1e, 0x1d, 0x1c, 0xff, 0xff, 0x1b, 0x1a, 0xff, 0x19, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x18, 0xff, 0x17, 0x16, 0x15, 0xff, 0x14, 0x13, 0x12, 0x11, 0x10, 0x0f, 0xff, 0xff, 0x0e, 0x0d, 0x0c, 0x0b, 0x0a, 0x09, 0xff, 0xff, 0x08, 0x07, 0xff, 0x06, 0xff, 0xff, 0xff, 0x05, 0x04, 0x03, 0xff, 0x02, 0xff, 0xff, 0xff, 0x01, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00 }; static unsigned char target2alpa[] = { 0xef, 0xe8, 0xe4, 0xe2, 0xe1, 0xe0, 0xdc, 0xda, 0xd9, 0xd6, 0xd5, 0xd4, 0xd3, 0xd2, 0xd1, 0xce, 0xcd, 0xcc, 0xcb, 0xca, 0xc9, 0xc7, 0xc6, 0xc5, 0xc3, 0xbc, 0xba, 0xb9, 0xb6, 0xb5, 0xb4, 0xb3, 0xb2, 0xb1, 0xae, 0xad, 0xac, 0xab, 0xaa, 0xa9, 0xa7, 0xa6, 0xa5, 0xa3, 0x9f, 0x9e, 0x9d, 0x9b, 0x98, 0x97, 0x90, 0x8f, 0x88, 0x84, 0x82, 0x81, 0x80, 0x7c, 0x7a, 0x79, 0x76, 0x75, 0x74, 0x73, 0x72, 0x71, 0x6e, 0x6d, 0x6c, 0x6b, 0x6a, 0x69, 0x67, 0x66, 0x65, 0x63, 0x5c, 0x5a, 0x59, 0x56, 0x55, 0x54, 0x53, 0x52, 0x51, 0x4e, 0x4d, 0x4c, 0x4b, 0x4a, 0x49, 0x47, 0x46, 0x45, 0x43, 0x3c, 0x3a, 0x39, 0x36, 0x35, 0x34, 0x33, 0x32, 0x31, 0x2e, 0x2d, 0x2c, 0x2b, 0x2a, 0x29, 0x27, 0x26, 0x25, 0x23, 0x1f, 0x1e, 0x1d, 0x1b, 0x18, 0x17, 0x10, 0x0f, 0x08, 0x04, 0x02, 0x01, 0x00 }; static int fcal_encode_addr(Scsi_Cmnd *SCpnt, u16 *addr, fc_channel *fc, fcp_cmnd *fcmd); int fcal_slave_configure(struct scsi_device *device) { int depth_to_use; if (device->tagged_supported) depth_to_use = /* 254 */ 8; else depth_to_use = 2; scsi_adjust_queue_depth(device, (device->tagged_supported ? MSG_SIMPLE_TAG : 0), depth_to_use); return 0; } /* Detect all FC Arbitrated Loops attached to the machine. fc4 module has done all the work for us... */ int __init fcal_detect(struct scsi_host_template *tpnt) { int nfcals = 0; fc_channel *fc; int fcalcount; int i; tpnt->proc_name = "fcal"; fcalcount = 0; for_each_online_fc_channel(fc) if (fc->posmap) fcalcount++; FCALND(("%d channels online\n", fcalcount)) if (!fcalcount) { #if defined(MODULE) && defined(CONFIG_FC4_SOCAL_MODULE) && defined(CONFIG_KMOD) request_module("socal"); for_each_online_fc_channel(fc) if (fc->posmap) fcalcount++; if (!fcalcount) #endif return 0; } for_each_online_fc_channel(fc) { struct Scsi_Host *host; long *ages; struct fcal *fcal; if (!fc->posmap) continue; /* Strange, this is already registered to some other SCSI host, then it cannot be fcal */ if (fc->scsi_name[0]) continue; memcpy (fc->scsi_name, "FCAL", 4); fc->can_queue = FCAL_CAN_QUEUE; fc->rsp_size = 64; fc->encode_addr = fcal_encode_addr; ages = kmalloc (128 * sizeof(long), GFP_KERNEL); if (!ages) continue; host = scsi_register (tpnt, sizeof (struct fcal)); if (!host) { kfree(ages); continue; } if (!try_module_get(fc->module)) { kfree(ages); scsi_unregister(host); continue; } nfcals++; fcal = (struct fcal *)host->hostdata; fc->fcp_register(fc, TYPE_SCSI_FCP, 0); for (i = 0; i < fc->posmap->len; i++) { int status, target, alpa; alpa = fc->posmap->list[i]; FCALD(("Sending PLOGI to %02x\n", alpa)) target = alpa2target[alpa]; status = fc_do_plogi(fc, alpa, fcal->node_wwn + target, fcal->nport_wwn + target); FCALD(("PLOGI returned with status %d\n", status)) if (status != FC_STATUS_OK) continue; FCALD(("Sending PRLI to %02x\n", alpa)) status = fc_do_prli(fc, alpa); FCALD(("PRLI returned with status %d\n", status)) if (status == FC_STATUS_OK) fcal->map[target] = 1; } host->max_id = 127; host->irq = fc->irq; #ifdef __sparc_v9__ host->unchecked_isa_dma = 1; #endif fc->channels = 1; fc->targets = 127; fc->ages = ages; memset (ages, 0, 128 * sizeof(long)); fcal->fc = fc; FCALD(("Found FCAL\n")) } if (nfcals) #ifdef __sparc__ printk ("FCAL: Total of %d Sun Enterprise Network Array (A5000 or EX500) channels found\n", nfcals); #else printk ("FCAL: Total of %d Fibre Channel Arbitrated Loops found\n", nfcals); #endif return nfcals; } int fcal_release(struct Scsi_Host *host) { struct fcal *fcal = (struct fcal *)host->hostdata; fc_channel *fc = fcal->fc; module_put(fc->module); fc->fcp_register(fc, TYPE_SCSI_FCP, 1); FCALND((" releasing fcal.\n")); kfree (fc->ages); FCALND(("released fcal!\n")); return 0; } #undef SPRINTF #define SPRINTF(args...) { if (pos < (buffer + length)) pos += sprintf (pos, ## args); } int fcal_proc_info (struct Scsi_Host *host, char *buffer, char **start, off_t offset, int length, int inout) { struct fcal *fcal; fc_channel *fc; char *pos = buffer; int i, j; if (inout) return length; fcal = (struct fcal *)host->hostdata; fc = fcal->fc; #ifdef __sparc__ SPRINTF ("Sun Enterprise Network Array (A5000 or E?500) on %s PROM node %x\n", fc->name, fc->dev->prom_node); #else SPRINTF ("Fibre Channel Arbitrated Loop on %s\n", fc->name); #endif SPRINTF ("Initiator AL-PA: %02x\n", fc->sid); SPRINTF ("\nAttached devices:\n"); for (i = 0; i < fc->posmap->len; i++) { unsigned char alpa = fc->posmap->list[i]; unsigned char target; u32 *u1, *u2; target = alpa2target[alpa]; u1 = (u32 *)&fcal->nport_wwn[target]; u2 = (u32 *)&fcal->node_wwn[target]; if (!u1[0] && !u1[1]) { SPRINTF (" [AL-PA: %02x] Not responded to PLOGI\n", alpa); } else if (!fcal->map[target]) { SPRINTF (" [AL-PA: %02x, Port WWN: %08x%08x, Node WWN: %08x%08x] Not responded to PRLI\n", alpa, u1[0], u1[1], u2[0], u2[1]); } else { struct scsi_device *scd; shost_for_each_device(scd, host) if (scd->id == target) { SPRINTF (" [AL-PA: %02x, Id: %02d, Port WWN: %08x%08x, Node WWN: %08x%08x] ", alpa, target, u1[0], u1[1], u2[0], u2[1]); SPRINTF ("%s ", (scd->type < MAX_SCSI_DEVICE_CODE) ? scsi_device_types[(short) scd->type] : "Unknown device"); for (j = 0; (j < 8) && (scd->vendor[j] >= 0x20); j++) SPRINTF ("%c", scd->vendor[j]); SPRINTF (" "); for (j = 0; (j < 16) && (scd->model[j] >= 0x20); j++) SPRINTF ("%c", scd->model[j]); SPRINTF ("\n"); } } } SPRINTF ("\n"); *start = buffer + offset; if ((pos - buffer) < offset) return 0; else if (pos - buffer - offset < length) return pos - buffer - offset; else return length; } /* For FC-AL, we use a simple addressing: we have just one channel 0, and all AL-PAs are mapped to targets 0..0x7e */ static int fcal_encode_addr(Scsi_Cmnd *SCpnt, u16 *addr, fc_channel *fc, fcp_cmnd *fcmd) { struct fcal *f; /* We don't support LUNs yet - I'm not sure if LUN should be in SCSI fcp_cdb, or in second byte of addr[0] */ if (SCpnt->cmnd[1] & 0xe0) return -EINVAL; /* FC-PLDA tells us... */ memset(addr, 0, 8); f = (struct fcal *)SCpnt->device->host->hostdata; if (!f->map[SCpnt->device->id]) return -EINVAL; /* Now, determine DID: It will be Native Identifier, so we zero upper 2 bytes of the 3 byte DID, lowest byte will be AL-PA */ fcmd->did = target2alpa[SCpnt->device->id]; FCALD(("trying DID %06x\n", fcmd->did)) return 0; } static struct scsi_host_template driver_template = { .name = "Fibre Channel Arbitrated Loop", .detect = fcal_detect, .release = fcal_release, .proc_info = fcal_proc_info, .queuecommand = fcp_scsi_queuecommand, .slave_configure = fcal_slave_configure, .can_queue = FCAL_CAN_QUEUE, .this_id = -1, .sg_tablesize = 1, .cmd_per_lun = 1, .use_clustering = ENABLE_CLUSTERING, .eh_abort_handler = fcp_scsi_abort, .eh_device_reset_handler = fcp_scsi_dev_reset, .eh_host_reset_handler = fcp_scsi_host_reset, }; #include "scsi_module.c" MODULE_LICENSE("GPL");