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OpenCloudOS-Kernel/drivers/fc4/fc.c

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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/jiffies.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 <asm/pgtable.h>
#include <asm/irq.h>
#include <asm/semaphore.h>
#include "fcp_impl.h"
#include <scsi/scsi_host.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)
#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)
#endif
#define FCP_CMND(SCpnt) ((fcp_cmnd *)&(SCpnt->SCp))
#define FC_SCMND(SCpnt) ((fc_channel *)(SCpnt->device->host->hostdata[0]))
#define SC_FCMND(fcmnd) ((struct scsi_cmnd *)((long)fcmnd - (long)&(((struct scsi_cmnd *)0)->SCp)))
static int fcp_scsi_queue_it(fc_channel *, struct 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),
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),
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),
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),
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),
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 *)kzalloc(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;
/* 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),
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),
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 = kzalloc (size, GFP_KERNEL);
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 **)kzalloc(slots * sizeof(fcp_cmnd*), GFP_KERNEL);
fc->abort_count = 0;
} else {
fc->scsi_name[0] = 0;
kfree (fc->scsi_bitmap);
kfree (fc->cmd_slots);
FCND(("Unregistering\n"));
#if 0
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?!");
}
}
#endif
FCND(("Unregistered\n"));
}
} else
printk ("FC: %segistering unknown type %02x\n", unregister ? "Unr" : "R", type);
}
static void fcp_scsi_done(struct 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;
struct 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->request_buffer,
SCpnt->use_sg,
SCpnt->sc_data_direction);
else
dma_unmap_single(fc->dev, fcmd->data, SCpnt->request_bufflen,
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->device->channel, SCpnt->device->id, 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 = kzalloc(sizeof (ls) + count, GFP_KERNEL);
if (!l) {
printk ("FC: Cannot allocate memory for initialization\n");
return -ENOMEM;
}
l->magic = LSMAGIC;
l->count = count;
FCND(("FCP Init for %d channels\n", count))
init_MUTEX_LOCKED(&l->sem);
init_timer(&l->timer);
l->timer.function = fcp_login_timeout;
l->timer.data = (unsigned long)l;
atomic_set (&l->todo, count);
l->logi = kzalloc (count * 3 * sizeof(logi), GFP_KERNEL);
l->fcmds = kzalloc (count * sizeof(fcp_cmnd), GFP_KERNEL);
if (!l->logi || !l->fcmds) {
kfree (l->logi);
kfree (l->fcmds);
kfree (l);
printk ("FC: Cannot allocate DMA memory for initialization\n");
return -ENOMEM;
}
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),
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++) {
if (fc->state == FC_STATE_ONLINE || fc->state == FC_STATE_OFFLINE)
continue;
disable_irq(fc->irq);
if (fc->state == FC_STATE_MAYBEOFFLINE) {
if (!l->grace[i]) {
l->grace[i]++;
FCD(("Grace\n"))
} else {
fc->state = FC_STATE_OFFLINE;
enable_irq(fc->irq);
dma_unmap_single (fc->dev, l->fcmds[i].cmd, 3 * sizeof(logi), DMA_BIDIRECTIONAL);
if (atomic_dec_and_test (&l->todo))
goto all_done;
}
}
ret = fc->hw_enque (fc, fc->login);
enable_irq(fc->irq);
if (!ret) {
nqueued++;
continue;
}
if (ret == -ENOSYS && fc->login->proto == PROTO_REPORT_AL_MAP) {
/* Oh yes, this card handles Point-to-Point only, so let's try that. */
fc_hdr *fch;
FCD(("SID %d DID %d\n", fc->sid, fc->did))
fcmd = l->fcmds + i;
dma_unmap_single(fc->dev, fcmd->cmd, 3 * sizeof(logi), DMA_BIDIRECTIONAL);
fch = &fcmd->fch;
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), 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;
} else
printk ("FC: Cannot enque FLOGI/REPORT_MAP packet on %s\n", fc->name);
}
if (nqueued) {
l->timer.expires = jiffies + 5 * HZ;
add_timer(&l->timer);
down(&l->sem);
if (!atomic_read(&l->todo)) {
FCND(("All channels answered in time\n"))
break; /* All fc channels have answered us */
}
}
}
all_done:
for (fc = fcchain, i = 0; fc && i < count; fc = fc->next, i++) {
fc->ls = NULL;
switch (fc->state) {
case FC_STATE_ONLINE: break;
case FC_STATE_OFFLINE: break;
default: dma_unmap_single (fc->dev, l->fcmds[i].cmd, 3 * sizeof(logi), DMA_BIDIRECTIONAL);
break;
}
}
del_timer(&l->timer);
kfree (l->logi);
kfree (l->fcmds);
kfree (l);
return 0;
}
int fcp_forceoffline(fc_channel *fcchain, int count)
{
fc_channel *fc;
fcp_cmnd *fcmd;
int i, ret;
lso l;
memset (&l, 0, sizeof(lso));
l.count = count;
l.magic = LSOMAGIC;
FCND(("FCP Force Offline for %d channels\n", count))
init_MUTEX_LOCKED(&l.sem);
init_timer(&l.timer);
l.timer.function = fcp_login_timeout;
l.timer.data = (unsigned long)&l;
atomic_set (&l.todo, count);
l.fcmds = kzalloc (count * sizeof(fcp_cmnd), GFP_KERNEL);
if (!l.fcmds) {
printk ("FC: Cannot allocate memory for forcing offline\n");
return -ENOMEM;
}
FCND(("Initializing OFFLINE packets\n"))
for (fc = fcchain, i = 0; fc && i < count; fc = fc->next, i++) {
fc->state = FC_STATE_UNINITED;
fcmd = l.fcmds + i;
fc->login = fcmd;
fc->ls = (void *)&l;
fcmd->did = fc->did;
fcmd->class = FC_CLASS_OFFLINE;
fcmd->proto = PROTO_OFFLINE;
fcmd->token = i;
fcmd->fc = fc;
disable_irq(fc->irq);
ret = fc->hw_enque (fc, fc->login);
enable_irq(fc->irq);
if (ret) printk ("FC: Cannot enque OFFLINE packet on %s\n", fc->name);
}
l.timer.expires = jiffies + 5 * HZ;
add_timer(&l.timer);
down(&l.sem);
del_timer(&l.timer);
for (fc = fcchain, i = 0; fc && i < count; fc = fc->next, i++)
fc->ls = NULL;
kfree (l.fcmds);
return 0;
}
int fcp_init(fc_channel *fcchain)
{
fc_channel *fc;
int count=0;
int ret;
for (fc = fcchain; fc; fc = fc->next) {
fc->fcp_register = fcp_register;
count++;
}
ret = fcp_initialize (fcchain, count);
if (ret)
return ret;
if (!fc_channels)
fc_channels = fcchain;
else {
for (fc = fc_channels; fc->next; fc = fc->next);
fc->next = fcchain;
}
return ret;
}
void fcp_release(fc_channel *fcchain, int count) /* count must > 0 */
{
fc_channel *fc;
fc_channel *fcx;
for (fc = fcchain; --count && fc->next; fc = fc->next);
if (count) {
printk("FC: nothing to release\n");
return;
}
if (fc_channels == fcchain)
fc_channels = fc->next;
else {
for (fcx = fc_channels; fcx->next != fcchain; fcx = fcx->next);
fcx->next = fc->next;
}
fc->next = NULL;
/*
* We've just grabbed fcchain out of the fc_channel list
* and zero-terminated it, while destroying the count.
*
* Freeing the fc's is the low level driver's responsibility.
*/
}
static void fcp_scsi_done(struct scsi_cmnd *SCpnt)
{
if (FCP_CMND(SCpnt)->done)
FCP_CMND(SCpnt)->done(SCpnt);
}
static int fcp_scsi_queue_it(fc_channel *fc, struct scsi_cmnd *SCpnt,
fcp_cmnd *fcmd, int prepare)
{
long i;
fcp_cmd *cmd;
u32 fcp_cntl;
if (prepare) {
i = find_first_zero_bit (fc->scsi_bitmap, fc->scsi_bitmap_end);
set_bit (i, fc->scsi_bitmap);
fcmd->token = i;
cmd = fc->scsi_cmd_pool + i;
if (fc->encode_addr (SCpnt, cmd->fcp_addr, fc, fcmd)) {
/* Invalid channel/id/lun and couldn't map it into fcp_addr */
clear_bit (i, fc->scsi_bitmap);
SCpnt->result = (DID_BAD_TARGET << 16);
SCpnt->scsi_done(SCpnt);
return 0;
}
fc->scsi_free--;
fc->cmd_slots[fcmd->token] = fcmd;
if (SCpnt->device->tagged_supported) {
if (jiffies - fc->ages[SCpnt->device->channel * fc->targets + SCpnt->device->id] > (5 * 60 * HZ)) {
fc->ages[SCpnt->device->channel * fc->targets + SCpnt->device->id] = jiffies;
fcp_cntl = FCP_CNTL_QTYPE_ORDERED;
} else
fcp_cntl = FCP_CNTL_QTYPE_SIMPLE;
} else
fcp_cntl = FCP_CNTL_QTYPE_UNTAGGED;
if (!SCpnt->request_bufflen && !SCpnt->use_sg) {
cmd->fcp_cntl = fcp_cntl;
fcmd->data = (dma_addr_t)NULL;
} else {
switch (SCpnt->cmnd[0]) {
case WRITE_6:
case WRITE_10:
case WRITE_12:
cmd->fcp_cntl = (FCP_CNTL_WRITE | fcp_cntl); break;
default:
cmd->fcp_cntl = (FCP_CNTL_READ | fcp_cntl); break;
}
if (!SCpnt->use_sg) {
cmd->fcp_data_len = SCpnt->request_bufflen;
fcmd->data = dma_map_single (fc->dev, (char *)SCpnt->request_buffer,
SCpnt->request_bufflen,
SCpnt->sc_data_direction);
} else {
struct scatterlist *sg = (struct scatterlist *)SCpnt->request_buffer;
int nents;
FCD(("XXX: Use_sg %d %d\n", SCpnt->use_sg, sg->length))
nents = dma_map_sg (fc->dev, sg, SCpnt->use_sg,
SCpnt->sc_data_direction);
if (nents > 1) printk ("%s: SG for nents %d (use_sg %d) not handled yet\n", fc->name, nents, SCpnt->use_sg);
fcmd->data = sg_dma_address(sg);
cmd->fcp_data_len = sg_dma_len(sg);
}
}
memcpy (cmd->fcp_cdb, SCpnt->cmnd, SCpnt->cmd_len);
memset (cmd->fcp_cdb+SCpnt->cmd_len, 0, sizeof(cmd->fcp_cdb)-SCpnt->cmd_len);
FCD(("XXX: %04x.%04x.%04x.%04x - %08x%08x%08x\n", cmd->fcp_addr[0], cmd->fcp_addr[1], cmd->fcp_addr[2], cmd->fcp_addr[3], *(u32 *)SCpnt->cmnd, *(u32 *)(SCpnt->cmnd+4), *(u32 *)(SCpnt->cmnd+8)))
}
FCD(("Trying to enque %p\n", fcmd))
if (!fc->scsi_que) {
if (!fc->hw_enque (fc, fcmd)) {
FCD(("hw_enque succeeded for %p\n", fcmd))
return 0;
}
}
FCD(("Putting into que1 %p\n", fcmd))
fcp_scsi_insert_queue (fc, fcmd);
return 0;
}
int fcp_scsi_queuecommand(struct scsi_cmnd *SCpnt,
void (* done)(struct scsi_cmnd *))
{
fcp_cmnd *fcmd = FCP_CMND(SCpnt);
fc_channel *fc = FC_SCMND(SCpnt);
FCD(("Entering SCSI queuecommand %p\n", fcmd))
if (SCpnt->done != fcp_scsi_done) {
fcmd->done = SCpnt->done;
SCpnt->done = fcp_scsi_done;
SCpnt->scsi_done = done;
fcmd->proto = TYPE_SCSI_FCP;
if (!fc->scsi_free) {
FCD(("FC: !scsi_free, putting cmd on ML queue\n"))
#if (FCP_SCSI_USE_NEW_EH_CODE == 0)
printk("fcp_scsi_queue_command: queue full, losing cmd, bad\n");
#endif
return 1;
}
return fcp_scsi_queue_it(fc, SCpnt, fcmd, 1);
}
return fcp_scsi_queue_it(fc, SCpnt, fcmd, 0);
}
void fcp_queue_empty(fc_channel *fc)
{
fcp_cmnd *fcmd;
FCD(("Queue empty\n"))
while ((fcmd = fc->scsi_que)) {
/* The hw told us we can try again queue some packet */
if (fc->hw_enque (fc, fcmd))
break;
fcp_scsi_remove_queue (fc, fcmd);
}
}
int fcp_scsi_abort(struct scsi_cmnd *SCpnt)
{
/* Internal bookkeeping only. Lose 1 cmd_slots slot. */
fcp_cmnd *fcmd = FCP_CMND(SCpnt);
fc_channel *fc = FC_SCMND(SCpnt);
/*
* We react to abort requests by simply forgetting
* about the command and pretending everything's sweet.
* This may or may not be silly. We can't, however,
* immediately reuse the command's cmd_slots slot,
* as its result may arrive later and we cannot
* check whether it is the aborted one, can't we?
*
* Therefore, after the first few aborts are done,
* we tell the scsi error handler to do something clever.
* It will eventually call host reset, refreshing
* cmd_slots for us.
*
* There is a theoretical chance that we sometimes allow
* more than can_queue packets to the jungle this way,
* but the worst outcome possible is a series of
* more aborts and eventually the dev_reset catharsis.
*/
if (++fc->abort_count < (fc->can_queue >> 1)) {
SCpnt->result = DID_ABORT;
fcmd->done(SCpnt);
printk("FC: soft abort\n");
return SUCCESS;
} else {
printk("FC: hard abort refused\n");
return FAILED;
}
}
#if 0
void fcp_scsi_reset_done(struct scsi_cmnd *SCpnt)
{
fc_channel *fc = FC_SCMND(SCpnt);
fc->rst_pkt->eh_state = SCSI_STATE_FINISHED;
up(fc->rst_pkt->device->host->eh_action);
}
#endif
#define FCP_RESET_TIMEOUT (2*HZ)
int fcp_scsi_dev_reset(struct scsi_cmnd *SCpnt)
{
#if 0 /* broken junk, but if davem wants to compile this driver, let him.. */
unsigned long flags;
fcp_cmd *cmd;
fcp_cmnd *fcmd;
fc_channel *fc = FC_SCMND(SCpnt);
DECLARE_MUTEX_LOCKED(sem);
if (!fc->rst_pkt) {
fc->rst_pkt = (struct scsi_cmnd *) kmalloc(sizeof(SCpnt), GFP_KERNEL);
if (!fc->rst_pkt) return FAILED;
fcmd = FCP_CMND(fc->rst_pkt);
fcmd->token = 0;
cmd = fc->scsi_cmd_pool + 0;
FCD(("Preparing rst packet\n"))
fc->encode_addr (SCpnt, cmd->fcp_addr, fc, fcmd);
fc->rst_pkt->device = SCpnt->device;
fc->rst_pkt->cmd_len = 0;
fc->cmd_slots[0] = fcmd;
cmd->fcp_cntl = FCP_CNTL_QTYPE_ORDERED | FCP_CNTL_RESET;
fcmd->data = (dma_addr_t)NULL;
fcmd->proto = TYPE_SCSI_FCP;
memcpy (cmd->fcp_cdb, SCpnt->cmnd, SCpnt->cmd_len);
memset (cmd->fcp_cdb+SCpnt->cmd_len, 0, sizeof(cmd->fcp_cdb)-SCpnt->cmd_len);
FCD(("XXX: %04x.%04x.%04x.%04x - %08x%08x%08x\n", cmd->fcp_addr[0], cmd->fcp_addr[1], cmd->fcp_addr[2], cmd->fcp_addr[3], *(u32 *)SCpnt->cmnd, *(u32 *)(SCpnt->cmnd+4), *(u32 *)(SCpnt->cmnd+8)))
} else {
fcmd = FCP_CMND(fc->rst_pkt);
if (fc->rst_pkt->eh_state == SCSI_STATE_QUEUED)
return FAILED; /* or SUCCESS. Only these */
}
fc->rst_pkt->done = NULL;
fc->rst_pkt->eh_state = SCSI_STATE_QUEUED;
init_timer(&fc->rst_pkt->eh_timeout);
fc->rst_pkt->eh_timeout.data = (unsigned long) fc->rst_pkt;
fc->rst_pkt->eh_timeout.expires = jiffies + FCP_RESET_TIMEOUT;
fc->rst_pkt->eh_timeout.function = (void (*)(unsigned long))fcp_scsi_reset_done;
add_timer(&fc->rst_pkt->eh_timeout);
/*
* Set up the semaphore so we wait for the command to complete.
*/
fc->rst_pkt->device->host->eh_action = &sem;
fc->rst_pkt->done = fcp_scsi_reset_done;
spin_lock_irqsave(SCpnt->device->host->host_lock, flags);
fcp_scsi_queue_it(fc, fc->rst_pkt, fcmd, 0);
spin_unlock_irqrestore(SCpnt->device->host->host_lock, flags);
down(&sem);
fc->rst_pkt->device->host->eh_action = NULL;
del_timer(&fc->rst_pkt->eh_timeout);
/*
* See if timeout. If so, tell the host to forget about it.
* In other words, we don't want a callback any more.
*/
if (fc->rst_pkt->eh_state == SCSI_STATE_TIMEOUT ) {
fc->rst_pkt->eh_state = SCSI_STATE_UNUSED;
return FAILED;
}
fc->rst_pkt->eh_state = SCSI_STATE_UNUSED;
#endif
return SUCCESS;
}
static int __fcp_scsi_host_reset(struct scsi_cmnd *SCpnt)
{
fc_channel *fc = FC_SCMND(SCpnt);
fcp_cmnd *fcmd = FCP_CMND(SCpnt);
int i;
printk ("FC: host reset\n");
for (i=0; i < fc->can_queue; i++) {
if (fc->cmd_slots[i] && SCpnt->result != DID_ABORT) {
SCpnt->result = DID_RESET;
fcmd->done(SCpnt);
fc->cmd_slots[i] = NULL;
}
}
fc->reset(fc);
fc->abort_count = 0;
if (fcp_initialize(fc, 1)) return SUCCESS;
else return FAILED;
}
int fcp_scsi_host_reset(struct scsi_cmnd *SCpnt)
{
unsigned long flags;
int rc;
spin_lock_irqsave(SCpnt->device->host->host_lock, flags);
rc = __fcp_scsi_host_reset(SCpnt);
spin_unlock_irqrestore(SCpnt->device->host->host_lock, flags);
return rc;
}
static int fcp_els_queue_it(fc_channel *fc, fcp_cmnd *fcmd)
{
long i;
i = find_first_zero_bit (fc->scsi_bitmap, fc->scsi_bitmap_end);
set_bit (i, fc->scsi_bitmap);
fcmd->token = i;
fc->scsi_free--;
fc->cmd_slots[fcmd->token] = fcmd;
return fcp_scsi_queue_it(fc, NULL, fcmd, 0);
}
static int fc_do_els(fc_channel *fc, unsigned int alpa, void *data, int len)
{
fcp_cmnd _fcmd, *fcmd;
fc_hdr *fch;
lse l;
int i;
fcmd = &_fcmd;
memset(fcmd, 0, sizeof(fcp_cmnd));
FCD(("PLOGI SID %d DID %d\n", fc->sid, alpa))
fch = &fcmd->fch;
FILL_FCHDR_RCTL_DID(fch, R_CTL_ELS_REQ, alpa);
FILL_FCHDR_SID(fch, fc->sid);
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;
fcmd->cmd = dma_map_single (fc->dev, data, 2 * len, DMA_BIDIRECTIONAL);
fcmd->rsp = fcmd->cmd + len;
fcmd->cmdlen = len;
fcmd->rsplen = len;
fcmd->data = (dma_addr_t)NULL;
fcmd->fc = fc;
fcmd->class = FC_CLASS_SIMPLE;
fcmd->proto = TYPE_EXTENDED_LS;
memset (&l, 0, sizeof(lse));
l.magic = LSEMAGIC;
init_MUTEX_LOCKED(&l.sem);
l.timer.function = fcp_login_timeout;
l.timer.data = (unsigned long)&l;
l.status = FC_STATUS_TIMED_OUT;
fcmd->ls = (void *)&l;
disable_irq(fc->irq);
fcp_els_queue_it(fc, fcmd);
enable_irq(fc->irq);
for (i = 0;;) {
l.timer.expires = jiffies + 5 * HZ;
add_timer(&l.timer);
down(&l.sem);
del_timer(&l.timer);
if (l.status != FC_STATUS_TIMED_OUT) break;
if (++i == 3) break;
disable_irq(fc->irq);
fcp_scsi_queue_it(fc, NULL, fcmd, 0);
enable_irq(fc->irq);
}
clear_bit(fcmd->token, fc->scsi_bitmap);
fc->scsi_free++;
dma_unmap_single (fc->dev, fcmd->cmd, 2 * len, DMA_BIDIRECTIONAL);
return l.status;
}
int fc_do_plogi(fc_channel *fc, unsigned char alpa, fc_wwn *node, fc_wwn *nport)
{
logi *l;
int status;
l = (logi *)kzalloc(2 * sizeof(logi), GFP_KERNEL);
if (!l) return -ENOMEM;
l->code = LS_PLOGI;
memcpy (&l->nport_wwn, &fc->wwn_nport, sizeof(fc_wwn));
memcpy (&l->node_wwn, &fc->wwn_node, sizeof(fc_wwn));
memcpy (&l->common, fc->common_svc, sizeof(common_svc_parm));
memcpy (&l->class1, fc->class_svcs, 3*sizeof(svc_parm));
status = fc_do_els(fc, alpa, l, sizeof(logi));
if (status == FC_STATUS_OK) {
if (l[1].code == LS_ACC) {
#ifdef FCDEBUG
u32 *u = (u32 *)&l[1].nport_wwn;
FCD(("AL-PA %02x: Port WWN %08x%08x Node WWN %08x%08x\n", alpa,
u[0], u[1], u[2], u[3]))
#endif
memcpy(nport, &l[1].nport_wwn, sizeof(fc_wwn));
memcpy(node, &l[1].node_wwn, sizeof(fc_wwn));
} else
status = FC_STATUS_BAD_RSP;
}
kfree(l);
return status;
}
typedef struct {
unsigned int code;
unsigned params[4];
} prli;
int fc_do_prli(fc_channel *fc, unsigned char alpa)
{
prli *p;
int status;
p = (prli *)kzalloc(2 * sizeof(prli), GFP_KERNEL);
if (!p) return -ENOMEM;
p->code = LS_PRLI;
p->params[0] = 0x08002000;
p->params[3] = 0x00000022;
status = fc_do_els(fc, alpa, p, sizeof(prli));
if (status == FC_STATUS_OK && p[1].code != LS_PRLI_ACC && p[1].code != LS_ACC)
status = FC_STATUS_BAD_RSP;
kfree(p);
return status;
}
MODULE_LICENSE("GPL");
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