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/* fc.c: Generic Fibre Channel and FC4 SCSI driver.

 *

 * Copyright (C) 1997,1998,1999 Jakub Jelinek (jj@ultra.linux.cz)

 * Copyright (C) 1997,1998 Jirka Hanika (geo@ff.cuni.cz)

 *

 * There are two kinds of Fibre Channel adapters used in Linux. Either

 * the adapter is "smart" and does all FC bookkeeping by itself and

 * just presents a standard SCSI interface to the operating system

 * (that's e.g. the case with Qlogic FC cards), or leaves most of the FC

 * bookkeeping to the OS (e.g. soc, socal). Drivers for the former adapters

 * will look like normal SCSI drivers (with the exception of max_id will be

 * usually 127), the latter on the other side allows SCSI, IP over FC and other

 * protocols. This driver tree is for the latter adapters.

 *

 * This file should support both Point-to-Point and Arbitrated Loop topologies.

 *

 * Sources:

 *      Fibre Channel Physical & Signaling Interface (FC-PH), dpANS, 1994

 *      dpANS Fibre Channel Protocol for SCSI (X3.269-199X), Rev. 012, 1995

 *      Fibre Channel Arbitrated Loop (FC-AL), Rev. 4.5, 1995

 *      Fibre Channel Private Loop SCSI Direct Attach (FC-PLDA), Rev. 2.1, 1997

 */

#include <linux/module.h>

#include <linux/kernel.h>

#include <linux/sched.h>

#include <linux/types.h>

#include <linux/fcntl.h>

#include <linux/interrupt.h>

#include <linux/ptrace.h>

#include <linux/ioport.h>

#include <linux/in.h>

#include <linux/slab.h>

#include <linux/string.h>

#include <linux/init.h>

#include <linux/blk.h>

#include <asm/pgtable.h>

#include <asm/irq.h>

#include <asm/semaphore.h>

#include "fcp_impl.h"

#include "../scsi/hosts.h"

/* #define FCDEBUG */

#define fc_printk printk ("%s: ", fc->name); printk 

#ifdef FCDEBUG

#define FCD(x)  fc_printk x;

#define FCND(x) printk ("FC: "); printk x;

#else

#define FCD(x)

#define FCND(x)

#endif

#ifdef __sparc__

#define dma_alloc_consistent(d,s,p) sbus_alloc_consistent(d,s,p)

#define dma_free_consistent(d,s,v,h) sbus_free_consistent(d,s,v,h)

#define dma_map_single(d,v,s,dir) sbus_map_single(d,v,s,dir)

#define dma_unmap_single(d,h,s,dir) sbus_unmap_single(d,h,s,dir)

#define dma_map_sg(d,s,n,dir) sbus_map_sg(d,s,n,dir)

#define dma_unmap_sg(d,s,n,dir) sbus_unmap_sg(d,s,n,dir)

#define scsi_to_fc_dma_dir(dir) scsi_to_sbus_dma_dir(dir)

#define FC_DMA_BIDIRECTIONAL    SBUS_DMA_BIDIRECTIONAL

#else

#define dma_alloc_consistent(d,s,p) pci_alloc_consistent(d,s,p)

#define dma_free_consistent(d,s,v,h) pci_free_consistent(d,s,v,h)

#define dma_map_single(d,v,s,dir) pci_map_single(d,v,s,dir)

#define dma_unmap_single(d,h,s,dir) pci_unmap_single(d,h,s,dir)

#define dma_map_sg(d,s,n,dir) pci_map_sg(d,s,n,dir)

#define dma_unmap_sg(d,s,n,dir) pci_unmap_sg(d,s,n,dir)

#define scsi_to_fc_dma_dir(dir) scsi_to_pci_dma_dir(dir)

#define FC_DMA_BIDIRECTIONAL    PCI_DMA_BIDIRECTIONAL

#endif                                                         

#define FCP_CMND(SCpnt) ((fcp_cmnd *)&(SCpnt->SCp))

#define FC_SCMND(SCpnt) ((fc_channel *)(SCpnt->host->hostdata[0]))

#define SC_FCMND(fcmnd) ((Scsi_Cmnd *)((long)fcmnd - (long)&(((Scsi_Cmnd *)0)->SCp)))

static int fcp_scsi_queue_it(fc_channel *, Scsi_Cmnd *, fcp_cmnd *, int);

void fcp_queue_empty(fc_channel *);

static void fcp_scsi_insert_queue (fc_channel *fc, fcp_cmnd *fcmd)

{

        if (!fc->scsi_que) {

                fc->scsi_que = fcmd;

                fcmd->next = fcmd;

                fcmd->prev = fcmd;

        } else {

                fc->scsi_que->prev->next = fcmd;

                fcmd->prev = fc->scsi_que->prev;

                fc->scsi_que->prev = fcmd;

                fcmd->next = fc->scsi_que;

        }

}

static void fcp_scsi_remove_queue (fc_channel *fc, fcp_cmnd *fcmd)

{

        if (fcmd == fcmd->next) {

                fc->scsi_que = NULL;

                return;

        }

        if (fcmd == fc->scsi_que)

                fc->scsi_que = fcmd->next;

        fcmd->prev->next = fcmd->next;

        fcmd->next->prev = fcmd->prev;

}

fc_channel *fc_channels = NULL;

#define LSMAGIC 620829043

typedef struct {

        /* Must be first */

        struct semaphore sem;

        int magic;

        int count;

        logi *logi;

        fcp_cmnd *fcmds;

        atomic_t todo;

        struct timer_list timer;

        unsigned char grace[0];

} ls;

#define LSOMAGIC 654907799

typedef struct {

        /* Must be first */

        struct semaphore sem;

        int magic;

        int count;

        fcp_cmnd *fcmds;

        atomic_t todo;

        struct timer_list timer;

} lso;

#define LSEMAGIC 84482456

typedef struct {

        /* Must be first */

        struct semaphore sem;

        int magic;

        int status;

        struct timer_list timer;

} lse;

static void fcp_login_timeout(unsigned long data)

{

        ls *l = (ls *)data;

        FCND(("Login timeout\n"))

        up(&l->sem);

}

static void fcp_login_done(fc_channel *fc, int i, int status)

{

        fcp_cmnd *fcmd;

        logi *plogi;

        fc_hdr *fch;

        ls *l = (ls *)fc->ls;

        FCD(("Login done %d %d\n", i, status))

        if (i < l->count) {

                if (fc->state == FC_STATE_FPORT_OK) {

                        FCD(("Additional FPORT_OK received with status %d\n", status))

                        return;

                }

                switch (status) {

                case FC_STATUS_OK: /* Oh, we found a fabric */

                case FC_STATUS_P_RJT: /* Oh, we haven't found any */

                        fc->state = FC_STATE_FPORT_OK;

                        fcmd = l->fcmds + i;

                        plogi = l->logi + 3 * i;

                        dma_unmap_single (fc->dev, fcmd->cmd, 3 * sizeof(logi),

                                          FC_DMA_BIDIRECTIONAL);

                        plogi->code = LS_PLOGI;

                        memcpy (&plogi->nport_wwn, &fc->wwn_nport, sizeof(fc_wwn));

                        memcpy (&plogi->node_wwn, &fc->wwn_node, sizeof(fc_wwn));

                        memcpy (&plogi->common, fc->common_svc, sizeof(common_svc_parm));

                        memcpy (&plogi->class1, fc->class_svcs, 3*sizeof(svc_parm));

                        fch = &fcmd->fch;

                        fcmd->token += l->count;

                        FILL_FCHDR_RCTL_DID(fch, R_CTL_ELS_REQ, fc->did);

                        FILL_FCHDR_SID(fch, fc->sid);

#ifdef FCDEBUG

                        {

                                int i;

                                unsigned *x = (unsigned *)plogi;

                                printk ("logi: ");

                                for (i = 0; i < 21; i++)

                                        printk ("%08x ", x[i]);

                                printk ("\n");

                        }

#endif                  

                        fcmd->cmd = dma_map_single (fc->dev, plogi, 3 * sizeof(logi),

                                                    FC_DMA_BIDIRECTIONAL);

                        fcmd->rsp = fcmd->cmd + 2 * sizeof(logi);

                        if (fc->hw_enque (fc, fcmd))

                                printk ("FC: Cannot enque PLOGI packet on %s\n", fc->name);

                        break;

                case FC_STATUS_ERR_OFFLINE:

                        fc->state = FC_STATE_MAYBEOFFLINE;

                        FCD (("FC is offline %d\n", l->grace[i]))

                        break;

                default:

                        printk ("FLOGI failed for %s with status %d\n", fc->name, status);

                        /* Do some sort of error recovery here */

                        break;

                }

        } else {

                i -= l->count;

                if (fc->state != FC_STATE_FPORT_OK) {

                        FCD(("Unexpected N-PORT rsp received"))

                        return;

                }

                switch (status) {

                case FC_STATUS_OK:

                        plogi = l->logi + 3 * i;

                        dma_unmap_single (fc->dev, l->fcmds[i].cmd, 3 * sizeof(logi),

                                          FC_DMA_BIDIRECTIONAL);

                        if (!fc->wwn_dest.lo && !fc->wwn_dest.hi) {

                                memcpy (&fc->wwn_dest, &plogi[1].node_wwn, sizeof(fc_wwn));

                                FCD(("Dest WWN %08x%08x\n", *(u32 *)&fc->wwn_dest, fc->wwn_dest.lo))

                        } else if (fc->wwn_dest.lo != plogi[1].node_wwn.lo ||

                                   fc->wwn_dest.hi != plogi[1].node_wwn.hi) {

                                printk ("%s: mismatch in wwns. Got %08x%08x, expected %08x%08x\n",

                                        fc->name,

                                        *(u32 *)&plogi[1].node_wwn, plogi[1].node_wwn.lo,

                                        *(u32 *)&fc->wwn_dest, fc->wwn_dest.lo);

                        }

                        fc->state = FC_STATE_ONLINE;

                        printk ("%s: ONLINE\n", fc->name);

                        if (atomic_dec_and_test (&l->todo))

                                up(&l->sem);

                        break;

                case FC_STATUS_ERR_OFFLINE:

                        fc->state = FC_STATE_OFFLINE;

                        dma_unmap_single (fc->dev, l->fcmds[i].cmd, 3 * sizeof(logi),

                                          FC_DMA_BIDIRECTIONAL);

                        printk ("%s: FC is offline\n", fc->name);

                        if (atomic_dec_and_test (&l->todo))

                                up(&l->sem);

                        break;

                default:

                        printk ("PLOGI failed for %s with status %d\n", fc->name, status);

                        /* Do some sort of error recovery here */

                        break;

                }

        }

}

static void fcp_report_map_done(fc_channel *fc, int i, int status)

{

        fcp_cmnd *fcmd;

        fc_hdr *fch;

        unsigned char j;

        ls *l = (ls *)fc->ls;

        fc_al_posmap *p;

        FCD(("Report map done %d %d\n", i, status))

        switch (status) {

        case FC_STATUS_OK: /* Ok, let's have a fun on a loop */

                dma_unmap_single (fc->dev, l->fcmds[i].cmd, 3 * sizeof(logi),

                                  FC_DMA_BIDIRECTIONAL);

                p = (fc_al_posmap *)(l->logi + 3 * i);

#ifdef FCDEBUG

                {

                u32 *u = (u32 *)p;

                FCD(("%08x\n", u[0]))

                u ++;

                FCD(("%08x.%08x.%08x.%08x.%08x.%08x.%08x.%08x\n", u[0],u[1],u[2],u[3],u[4],u[5],u[6],u[7]))

                }

#endif          

                if ((p->magic & 0xffff0000) != FC_AL_LILP || !p->len) {

                        printk ("FC: Bad magic from REPORT_AL_MAP on %s - %08x\n", fc->name, p->magic);

                        fc->state = FC_STATE_OFFLINE;

                } else {

                        fc->posmap = (fcp_posmap *)kmalloc(sizeof(fcp_posmap)+p->len, GFP_KERNEL);

                        if (!fc->posmap) {

                                printk("FC: Not enough memory, offlining channel\n");

                                fc->state = FC_STATE_OFFLINE;

                        } else {

                                int k;

                                memset(fc->posmap, 0, sizeof(fcp_posmap)+p->len);

                                /* FIXME: This is where SOCAL transfers our AL-PA.

                                   Keep it here till we found out what other cards do... */

                                fc->sid = (p->magic & 0xff);

                                for (i = 0; i < p->len; i++)

                                        if (p->alpa[i] == fc->sid)

                                                break;

                                k = p->len;

                                if (i == p->len)

                                        i = 0;

                                else {

                                        p->len--;

                                        i++;

                                }

                                fc->posmap->len = p->len;

                                for (j = 0; j < p->len; j++) {

                                        if (i == k) i = 0;

                                        fc->posmap->list[j] = p->alpa[i++];

                                }

                                fc->state = FC_STATE_ONLINE;

                        }

                }

                printk ("%s: ONLINE\n", fc->name);

                if (atomic_dec_and_test (&l->todo))

                        up(&l->sem);

                break;

        case FC_STATUS_POINTTOPOINT: /* We're Point-to-Point, no AL... */

                FCD(("SID %d DID %d\n", fc->sid, fc->did))

                fcmd = l->fcmds + i;

                dma_unmap_single(fc->dev, fcmd->cmd, 3 * sizeof(logi),

                                 FC_DMA_BIDIRECTIONAL);

                fch = &fcmd->fch;

                memset(l->logi + 3 * i, 0, 3 * sizeof(logi));

                FILL_FCHDR_RCTL_DID(fch, R_CTL_ELS_REQ, FS_FABRIC_F_PORT);

                FILL_FCHDR_SID(fch, 0);

                FILL_FCHDR_TYPE_FCTL(fch, TYPE_EXTENDED_LS, F_CTL_FIRST_SEQ | F_CTL_SEQ_INITIATIVE);

                FILL_FCHDR_SEQ_DF_SEQ(fch, 0, 0, 0);

                FILL_FCHDR_OXRX(fch, 0xffff, 0xffff);

                fch->param = 0;

                l->logi [3 * i].code = LS_FLOGI;

                fcmd->cmd = dma_map_single (fc->dev, l->logi + 3 * i, 3 * sizeof(logi),

                                            FC_DMA_BIDIRECTIONAL);

                fcmd->rsp = fcmd->cmd + sizeof(logi);

                fcmd->cmdlen = sizeof(logi);

                fcmd->rsplen = sizeof(logi);

                fcmd->data = (dma_addr_t)NULL;

                fcmd->class = FC_CLASS_SIMPLE;

                fcmd->proto = TYPE_EXTENDED_LS;

                if (fc->hw_enque (fc, fcmd))

                        printk ("FC: Cannot enque FLOGI packet on %s\n", fc->name);

                break;

        case FC_STATUS_ERR_OFFLINE:

                fc->state = FC_STATE_MAYBEOFFLINE;

                FCD (("FC is offline %d\n", l->grace[i]))

                break;

        default:

                printk ("FLOGI failed for %s with status %d\n", fc->name, status);

                /* Do some sort of error recovery here */

                break;

        }

}

void fcp_register(fc_channel *fc, u8 type, int unregister)

{

        int size, i;

        int slots = (fc->can_queue * 3) >> 1;

        FCND(("Going to %sregister\n", unregister ? "un" : ""))

        if (type == TYPE_SCSI_FCP) {

                if (!unregister) {

                        fc->scsi_cmd_pool = (fcp_cmd *)

                                dma_alloc_consistent (fc->dev,

                                                      slots * (sizeof (fcp_cmd) + fc->rsp_size),

                                                      &fc->dma_scsi_cmd);

                        fc->scsi_rsp_pool = (char *)(fc->scsi_cmd_pool + slots);

                        fc->dma_scsi_rsp = fc->dma_scsi_cmd + slots * sizeof (fcp_cmd);

                        fc->scsi_bitmap_end = (slots + 63) & ~63;

                        size = fc->scsi_bitmap_end / 8;

                        fc->scsi_bitmap = kmalloc (size, GFP_KERNEL);

                        memset (fc->scsi_bitmap, 0, size);

                        set_bit (0, fc->scsi_bitmap);

                        for (i = fc->can_queue; i < fc->scsi_bitmap_end; i++)

                                set_bit (i, fc->scsi_bitmap);

                        fc->scsi_free = fc->can_queue;

                        fc->cmd_slots = (fcp_cmnd **)kmalloc(slots * sizeof(fcp_cmnd*), GFP_KERNEL);

                        memset(fc->cmd_slots, 0, slots * sizeof(fcp_cmnd*));

                        fc->abort_count = 0;

                } else {

                        fc->scsi_name[0] = 0;

                        kfree (fc->scsi_bitmap);

                        kfree (fc->cmd_slots);

                        FCND(("Unregistering\n"));

                        if (fc->rst_pkt) {

                                if (fc->rst_pkt->eh_state == SCSI_STATE_UNUSED)

                                        kfree(fc->rst_pkt);

                                else {

                                        /* Can't happen. Some memory would be lost. */

                                        printk("FC: Reset in progress. Now?!");

                                }

                        }

                        FCND(("Unregistered\n"));

                }

        } else

                printk ("FC: %segistering unknown type %02x\n", unregister ? "Unr" : "R", type);

}

static void fcp_scsi_done(Scsi_Cmnd *SCpnt);

static inline void fcp_scsi_receive(fc_channel *fc, int token, int status, fc_hdr *fch)

{

        fcp_cmnd *fcmd;

        fcp_rsp  *rsp;

        int host_status;

        Scsi_Cmnd *SCpnt;

        int sense_len;

        int rsp_status;

        fcmd = fc->cmd_slots[token];

        if (!fcmd) return;

        rsp = (fcp_rsp *) (fc->scsi_rsp_pool + fc->rsp_size * token);

        SCpnt = SC_FCMND(fcmd);

        if (SCpnt->done != fcp_scsi_done)

                return;

        rsp_status = rsp->fcp_status;

        FCD(("rsp_status %08x status %08x\n", rsp_status, status))

        switch (status) {

        case FC_STATUS_OK:

                host_status=DID_OK;

                if (rsp_status & FCP_STATUS_RESID) {

#ifdef FCDEBUG

                        FCD(("Resid %d\n", rsp->fcp_resid))

                        {

                                fcp_cmd *cmd = fc->scsi_cmd_pool + token;

                                int i;

                                printk ("Command ");

                                for (i = 0; i < sizeof(fcp_cmd); i+=4)

                                        printk ("%08x ", *(u32 *)(((char *)cmd)+i));

                                printk ("\nResponse ");

                                for (i = 0; i < fc->rsp_size; i+=4)

                                        printk ("%08x ", *(u32 *)(((char *)rsp)+i));

                                printk ("\n");

                        }

#endif                  

                }

                if (rsp_status & FCP_STATUS_SENSE_LEN) {

                        sense_len = rsp->fcp_sense_len;

                        if (sense_len > sizeof(SCpnt->sense_buffer)) sense_len = sizeof(SCpnt->sense_buffer);

                        memcpy(SCpnt->sense_buffer, ((char *)(rsp+1)), sense_len);

                }

                if (fcmd->data) {

                        if (SCpnt->use_sg)

                                dma_unmap_sg(fc->dev, (struct scatterlist *)SCpnt->buffer, SCpnt->use_sg,

                                             scsi_to_fc_dma_dir(SCpnt->sc_data_direction));

                        else

                                dma_unmap_single(fc->dev, fcmd->data, SCpnt->request_bufflen,

                                                 scsi_to_fc_dma_dir(SCpnt->sc_data_direction));

                }

                break;

        default:

                host_status=DID_ERROR; /* FIXME */

                FCD(("Wrong FC status %d for token %d\n", status, token))

                break;

        }

        if (status_byte(rsp_status) == QUEUE_FULL) {

                printk ("%s: (%d,%d) Received rsp_status 0x%x\n", fc->name, SCpnt->channel, SCpnt->target, rsp_status);

        }

        SCpnt->result = (host_status << 16) | (rsp_status & 0xff);

#ifdef FCDEBUG  

        if (host_status || SCpnt->result || rsp_status) printk("FC: host_status %d, packet status %d\n",

                        host_status, SCpnt->result);

#endif

        SCpnt->done = fcmd->done;

        fcmd->done=NULL;

        clear_bit(token, fc->scsi_bitmap);

        fc->scsi_free++;

        FCD(("Calling scsi_done with %08x\n", SCpnt->result))

        SCpnt->scsi_done(SCpnt);

}

void fcp_receive_solicited(fc_channel *fc, int proto, int token, int status, fc_hdr *fch)

{

        int magic;

        FCD(("receive_solicited %d %d %d\n", proto, token, status))

        switch (proto) {

        case TYPE_SCSI_FCP:

                fcp_scsi_receive(fc, token, status, fch); break;

        case TYPE_EXTENDED_LS:

        case PROTO_REPORT_AL_MAP:

                magic = 0;

                if (fc->ls)

                        magic = ((ls *)(fc->ls))->magic;

                if (magic == LSMAGIC) {

                        ls *l = (ls *)fc->ls;

                        int i = (token >= l->count) ? token - l->count : token;

                        /* Let's be sure */

                        if ((unsigned)i < l->count && l->fcmds[i].fc == fc) {

                                if (proto == TYPE_EXTENDED_LS)

                                        fcp_login_done(fc, token, status);

                                else

                                        fcp_report_map_done(fc, token, status);

                                break;

                        }

                }

                FCD(("fc %p fc->ls %p fc->cmd_slots %p\n", fc, fc->ls, fc->cmd_slots))

                if (proto == TYPE_EXTENDED_LS && !fc->ls && fc->cmd_slots) {

                        fcp_cmnd *fcmd;

                        fcmd = fc->cmd_slots[token];

                        if (fcmd && fcmd->ls && ((ls *)(fcmd->ls))->magic == LSEMAGIC) {

                                lse *l = (lse *)fcmd->ls;

                                l->status = status;

                                up (&l->sem);

                        }

                }

                break;

        case PROTO_OFFLINE:

                if (fc->ls && ((lso *)(fc->ls))->magic == LSOMAGIC) {

                        lso *l = (lso *)fc->ls;

                        if ((unsigned)token < l->count && l->fcmds[token].fc == fc) {

                                /* Wow, OFFLINE response arrived :) */

                                FCD(("OFFLINE Response arrived\n"))

                                fc->state = FC_STATE_OFFLINE;

                                if (atomic_dec_and_test (&l->todo))

                                        up(&l->sem);

                        }

                }

                break;

        default:

                break;

        }

}

void fcp_state_change(fc_channel *fc, int state)

{

        FCD(("state_change %d %d\n", state, fc->state))

        if (state == FC_STATE_ONLINE && fc->state == FC_STATE_MAYBEOFFLINE)

                fc->state = FC_STATE_UNINITED;

        else if (state == FC_STATE_ONLINE)

                printk (KERN_WARNING "%s: state change to ONLINE\n", fc->name);

        else

                printk (KERN_ERR "%s: state change to OFFLINE\n", fc->name);

}

int fcp_initialize(fc_channel *fcchain, int count)

{

        fc_channel *fc;

        fcp_cmnd *fcmd;

        int i, retry, ret;

        ls *l;

        FCND(("fcp_inititialize %08lx\n", (long)fcp_init))

        FCND(("fc_channels %08lx\n", (long)fc_channels))

        FCND((" SID %d DID %d\n", fcchain->sid, fcchain->did))

        l = kmalloc(sizeof (ls) + count, GFP_KERNEL);

        if (!l) {

                printk ("FC: Cannot allocate memory for initialization\n");

                return -ENOMEM;

        }

        memset (l, 0, sizeof(ls) + count);

        l->magic = LSMAGIC;

        l->count = count;

        FCND(("FCP Init for %d channels\n", count))

        init_MUTEX_LOCKED(&l->sem);

        l->timer.function = fcp_login_timeout;

        l->timer.data = (unsigned long)l;

        atomic_set (&l->todo, count);

        l->logi = kmalloc (count * 3 * sizeof(logi), GFP_KERNEL);

        l->fcmds = kmalloc (count * sizeof(fcp_cmnd), GFP_KERNEL);

        if (!l->logi || !l->fcmds) {

                if (l->logi) kfree (l->logi);

                if (l->fcmds) kfree (l->fcmds);

                kfree (l);

                printk ("FC: Cannot allocate DMA memory for initialization\n");

                return -ENOMEM;

        }

        memset (l->logi, 0, count * 3 * sizeof(logi));

        memset (l->fcmds, 0, count * sizeof(fcp_cmnd));

        for (fc = fcchain, i = 0; fc && i < count; fc = fc->next, i++) {

                fc->state = FC_STATE_UNINITED;

                fc->rst_pkt = NULL;     /* kmalloc when first used */

        }

        /* First try if we are in a AL topology */

        FCND(("Initializing REPORT_MAP packets\n"))

        for (fc = fcchain, i = 0; fc && i < count; fc = fc->next, i++) {

                fcmd = l->fcmds + i;

                fc->login = fcmd;

                fc->ls = (void *)l;

                /* Assumes sizeof(fc_al_posmap) < 3 * sizeof(logi), which is true */

                fcmd->cmd = dma_map_single (fc->dev, l->logi + 3 * i, 3 * sizeof(logi),

                                            FC_DMA_BIDIRECTIONAL);

                fcmd->proto = PROTO_REPORT_AL_MAP;

                fcmd->token = i;

                fcmd->fc = fc;

        }

        for (retry = 0; retry < 8; retry++) {

                int nqueued = 0;

                FCND(("Sending REPORT_MAP/FLOGI/PLOGI packets\n"))

                for (fc = fcchain, i = 0; fc && i < count; fc = fc->next, i++) {