static int fcp_scsi_queue_it(fc_channel *fc, 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->channel * fc->targets + SCpnt->target] > (5 * 60 * HZ)) {				fc->ages[SCpnt->channel * fc->targets + SCpnt->target] = 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,							     scsi_to_fc_dma_dir(SCpnt->sc_data_direction));			} else {				struct scatterlist *sg = (struct scatterlist *)SCpnt->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,						    scsi_to_fc_dma_dir(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(Scsi_Cmnd *SCpnt, void (* done)(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_old_abort(Scsi_Cmnd *SCpnt){	printk("FC: Abort not implemented\n");	return 1;}int fcp_scsi_abort(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;	}}void fcp_scsi_reset_done(Scsi_Cmnd *SCpnt){	fc_channel *fc = FC_SCMND(SCpnt);	fc->rst_pkt->eh_state = SCSI_STATE_FINISHED;	up(fc->rst_pkt->host->eh_action);}#define FCP_RESET_TIMEOUT (2*HZ)int fcp_scsi_dev_reset(Scsi_Cmnd *SCpnt){	fcp_cmd *cmd;	fcp_cmnd *fcmd;	fc_channel *fc = FC_SCMND(SCpnt);        DECLARE_MUTEX_LOCKED(sem);	if (!fc->rst_pkt) {		fc->rst_pkt = (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->channel = SCpnt->channel;		fc->rst_pkt->target = SCpnt->target;		fc->rst_pkt->lun = 0;		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;	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->host->eh_action = &sem;	fc->rst_pkt->request.rq_status = RQ_SCSI_BUSY;	fc->rst_pkt->done = fcp_scsi_reset_done;	fcp_scsi_queue_it(fc, fc->rst_pkt, fcmd, 0);		down(&sem);	fc->rst_pkt->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;	return SUCCESS;}int fcp_scsi_bus_reset(Scsi_Cmnd *SCpnt){	printk ("FC: bus reset!\n");	return FAILED;}int fcp_scsi_host_reset(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;}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(fcmd));	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, FC_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, FC_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 *)kmalloc(2 * sizeof(logi), GFP_KERNEL);	if (!l) return -ENOMEM;	memset(l, 0, 2 * sizeof(logi));	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 *)kmalloc(2 * sizeof(prli), GFP_KERNEL);	if (!p) return -ENOMEM;	memset(p, 0, 2 * sizeof(prli));	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;}