/* 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>
#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");
