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/* 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 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;

                }

                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 %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

                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 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;

        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 %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: %s\n", 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 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 {

                        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 %06x\n", fcmd->did))

        return 0;

}

static Scsi_Host_Template driver_template = FCAL;

#include "scsi_module.c"

EXPORT_NO_SYMBOLS;