fcal.c
上传用户:lgb322
上传日期:2013-02-24
资源大小:30529k
文件大小:9k
- /* 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/blk.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 "hosts.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);
- static void fcal_select_queue_depths(struct Scsi_Host *host, Scsi_Device *devlist)
- {
- Scsi_Device *device;
-
- for (device = devlist; device; device = device->next) {
- if (device->host != host) continue;
- if (device->tagged_supported)
- device->queue_depth = /* 254 */ 8;
- else
- device->queue_depth = 2;
- }
- }
- /* Detect all FC Arbitrated Loops attached to the machine.
- fc4 module has done all the work for us... */
- int __init fcal_detect(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 onlinen", 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;
- }
-
- nfcals++;
-
- if (fc->module) __MOD_INC_USE_COUNT(fc->module);
-
- 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 %02xn", alpa))
- target = alpa2target[alpa];
- status = fc_do_plogi(fc, alpa, fcal->node_wwn + target,
- fcal->nport_wwn + target);
- FCALD(("PLOGI returned with status %dn", status))
- if (status != FC_STATUS_OK)
- continue;
- FCALD(("Sending PRLI to %02xn", alpa))
- status = fc_do_prli(fc, alpa);
- FCALD(("PRLI returned with status %dn", 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
- host->select_queue_depths = fcal_select_queue_depths;
- fc->channels = 1;
- fc->targets = 127;
- fc->ages = ages;
- memset (ages, 0, 128 * sizeof(long));
-
- fcal->fc = fc;
-
- FCALD(("Found FCALn"))
- }
- if (nfcals)
- #ifdef __sparc__
- printk ("FCAL: Total of %d Sun Enterprise Network Array (A5000 or EX500) channels foundn", nfcals);
- #else
- printk ("FCAL: Total of %d Fibre Channel Arbitrated Loops foundn", nfcals);
- #endif
- return nfcals;
- }
- int fcal_release(struct Scsi_Host *host)
- {
- struct fcal *fcal = (struct fcal *)host->hostdata;
- fc_channel *fc = fcal->fc;
- if (fc->module) __MOD_DEC_USE_COUNT(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 (char *buffer, char **start, off_t offset, int length, int hostno, int inout)
- {
- struct Scsi_Host *host = NULL;
- struct fcal *fcal;
- fc_channel *fc;
- char *pos = buffer;
- int i, j;
- for (host=scsi_hostlist; host; host=host->next)
- if (host->host_no == hostno)
- break;
- if (!host) return -ESRCH;
- 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 %xn", fc->name, fc->dev->prom_node);
- #else
- SPRINTF ("Fibre Channel Arbitrated Loop on %sn", fc->name);
- #endif
- SPRINTF ("Initiator AL-PA: %02xn", fc->sid);
- SPRINTF ("nAttached devices: %sn", host->host_queue ? "" : "none");
-
- 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 PLOGIn", alpa);
- } else if (!fcal->map[target]) {
- SPRINTF (" [AL-PA: %02x, Port WWN: %08x%08x, Node WWN: %08x%08x] Not responded to PRLIn",
- alpa, u1[0], u1[1], u2[0], u2[1]);
- } else {
- Scsi_Device *scd;
- for (scd = host->host_queue ; scd; scd = scd->next)
- if (scd->host->host_no == hostno && 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->host->hostdata;
- if (!f->map[SCpnt->target]) 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->target];
- FCALD(("trying DID %06xn", fcmd->did))
- return 0;
- }
- static Scsi_Host_Template driver_template = FCAL;
- #include "scsi_module.c"
- EXPORT_NO_SYMBOLS;