lpfc_nportdisc.c

linux-2.6.15.6

	lpfc_els_rsp_prli_acc(phba, cmdiocb, ndlp);
	return (ndlp->nlp_state);
}

static uint32_t
lpfc_rcv_logo_mapped_node(struct lpfc_hba * phba,
			  struct lpfc_nodelist * ndlp, void *arg, uint32_t evt)
{
	struct lpfc_iocbq *cmdiocb;

	cmdiocb = (struct lpfc_iocbq *) arg;

	lpfc_rcv_logo(phba, ndlp, cmdiocb);
	return (ndlp->nlp_state);
}

static uint32_t
lpfc_rcv_padisc_mapped_node(struct lpfc_hba * phba,
			    struct lpfc_nodelist * ndlp, void *arg,
			    uint32_t evt)
{
	struct lpfc_iocbq *cmdiocb;

	cmdiocb = (struct lpfc_iocbq *) arg;

	lpfc_rcv_padisc(phba, ndlp, cmdiocb);
	return (ndlp->nlp_state);
}

static uint32_t
lpfc_rcv_prlo_mapped_node(struct lpfc_hba * phba,
			  struct lpfc_nodelist * ndlp, void *arg, uint32_t evt)
{
	struct lpfc_iocbq *cmdiocb;

	cmdiocb = (struct lpfc_iocbq *) arg;

	/* flush the target */
	spin_lock_irq(phba->host->host_lock);
	lpfc_sli_abort_iocb(phba, &phba->sli.ring[phba->sli.fcp_ring],
			       ndlp->nlp_sid, 0, 0, LPFC_CTX_TGT);
	spin_unlock_irq(phba->host->host_lock);

	/* Treat like rcv logo */
	lpfc_rcv_logo(phba, ndlp, cmdiocb);
	return (ndlp->nlp_state);
}

static uint32_t
lpfc_device_recov_mapped_node(struct lpfc_hba * phba,
			    struct lpfc_nodelist * ndlp, void *arg,
			    uint32_t evt)
{
	ndlp->nlp_state = NLP_STE_NPR_NODE;
	lpfc_nlp_list(phba, ndlp, NLP_NPR_LIST);
	spin_lock_irq(phba->host->host_lock);
	ndlp->nlp_flag &= ~NLP_NPR_2B_DISC;
	spin_unlock_irq(phba->host->host_lock);
	lpfc_disc_set_adisc(phba, ndlp);
	return (ndlp->nlp_state);
}

static uint32_t
lpfc_rcv_plogi_npr_node(struct lpfc_hba * phba,
			    struct lpfc_nodelist * ndlp, void *arg,
			    uint32_t evt)
{
	struct lpfc_iocbq *cmdiocb;

	cmdiocb = (struct lpfc_iocbq *) arg;

	/* Ignore PLOGI if we have an outstanding LOGO */
	if (ndlp->nlp_flag & NLP_LOGO_SND) {
		return (ndlp->nlp_state);
	}

	if (lpfc_rcv_plogi(phba, ndlp, cmdiocb)) {
		spin_lock_irq(phba->host->host_lock);
		ndlp->nlp_flag &= ~(NLP_NPR_ADISC | NLP_NPR_2B_DISC);
		spin_unlock_irq(phba->host->host_lock);
		return (ndlp->nlp_state);
	}

	/* send PLOGI immediately, move to PLOGI issue state */
	if (!(ndlp->nlp_flag & NLP_DELAY_TMO)) {
			ndlp->nlp_state = NLP_STE_PLOGI_ISSUE;
			lpfc_nlp_list(phba, ndlp, NLP_PLOGI_LIST);
			lpfc_issue_els_plogi(phba, ndlp, 0);
	}
	return (ndlp->nlp_state);
}

static uint32_t
lpfc_rcv_prli_npr_node(struct lpfc_hba * phba,
			    struct lpfc_nodelist * ndlp, void *arg,
			    uint32_t evt)
{
	struct lpfc_iocbq     *cmdiocb;
	struct ls_rjt          stat;

	cmdiocb = (struct lpfc_iocbq *) arg;

	memset(&stat, 0, sizeof (struct ls_rjt));
	stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
	stat.un.b.lsRjtRsnCodeExp = LSEXP_NOTHING_MORE;
	lpfc_els_rsp_reject(phba, stat.un.lsRjtError, cmdiocb, ndlp);

	if (!(ndlp->nlp_flag & NLP_DELAY_TMO)) {
		if (ndlp->nlp_flag & NLP_NPR_ADISC) {
			ndlp->nlp_state = NLP_STE_ADISC_ISSUE;
			lpfc_nlp_list(phba, ndlp, NLP_ADISC_LIST);
			lpfc_issue_els_adisc(phba, ndlp, 0);
		} else {
			ndlp->nlp_state = NLP_STE_PLOGI_ISSUE;
			lpfc_nlp_list(phba, ndlp, NLP_PLOGI_LIST);
			lpfc_issue_els_plogi(phba, ndlp, 0);
		}
	}
	return (ndlp->nlp_state);
}

static uint32_t
lpfc_rcv_logo_npr_node(struct lpfc_hba * phba,
			    struct lpfc_nodelist * ndlp, void *arg,
			    uint32_t evt)
{
	struct lpfc_iocbq     *cmdiocb;

	cmdiocb = (struct lpfc_iocbq *) arg;

	lpfc_rcv_logo(phba, ndlp, cmdiocb);
	return (ndlp->nlp_state);
}

static uint32_t
lpfc_rcv_padisc_npr_node(struct lpfc_hba * phba,
			    struct lpfc_nodelist * ndlp, void *arg,
			    uint32_t evt)
{
	struct lpfc_iocbq     *cmdiocb;

	cmdiocb = (struct lpfc_iocbq *) arg;

	lpfc_rcv_padisc(phba, ndlp, cmdiocb);

	if (!(ndlp->nlp_flag & NLP_DELAY_TMO)) {
		if (ndlp->nlp_flag & NLP_NPR_ADISC) {
			ndlp->nlp_state = NLP_STE_ADISC_ISSUE;
			lpfc_nlp_list(phba, ndlp, NLP_ADISC_LIST);
			lpfc_issue_els_adisc(phba, ndlp, 0);
		} else {
			ndlp->nlp_state = NLP_STE_PLOGI_ISSUE;
			lpfc_nlp_list(phba, ndlp, NLP_PLOGI_LIST);
			lpfc_issue_els_plogi(phba, ndlp, 0);
		}
	}
	return (ndlp->nlp_state);
}

static uint32_t
lpfc_rcv_prlo_npr_node(struct lpfc_hba * phba,
			    struct lpfc_nodelist * ndlp, void *arg,
			    uint32_t evt)
{
	struct lpfc_iocbq     *cmdiocb;

	cmdiocb = (struct lpfc_iocbq *) arg;

	lpfc_els_rsp_acc(phba, ELS_CMD_ACC, cmdiocb, ndlp, NULL, 0);

	if (ndlp->nlp_flag & NLP_DELAY_TMO) {
		if (ndlp->nlp_last_elscmd == (unsigned long)ELS_CMD_PLOGI) {
			return (ndlp->nlp_state);
		} else {
			spin_lock_irq(phba->host->host_lock);
			ndlp->nlp_flag &= ~NLP_DELAY_TMO;
			spin_unlock_irq(phba->host->host_lock);
			del_timer_sync(&ndlp->nlp_delayfunc);
			if (!list_empty(&ndlp->els_retry_evt.evt_listp))
				list_del_init(&ndlp->els_retry_evt.evt_listp);
		}
	}

	ndlp->nlp_state = NLP_STE_PLOGI_ISSUE;
	lpfc_nlp_list(phba, ndlp, NLP_PLOGI_LIST);
	lpfc_issue_els_plogi(phba, ndlp, 0);
	return (ndlp->nlp_state);
}

static uint32_t
lpfc_cmpl_logo_npr_node(struct lpfc_hba * phba,
		struct lpfc_nodelist * ndlp, void *arg, uint32_t evt)
{
	lpfc_unreg_rpi(phba, ndlp);
	/* This routine does nothing, just return the current state */
	return (ndlp->nlp_state);
}

static uint32_t
lpfc_cmpl_reglogin_npr_node(struct lpfc_hba * phba,
			    struct lpfc_nodelist * ndlp, void *arg,
			    uint32_t evt)
{
	LPFC_MBOXQ_t *pmb;
	MAILBOX_t *mb;

	pmb = (LPFC_MBOXQ_t *) arg;
	mb = &pmb->mb;

	ndlp->nlp_rpi = mb->un.varWords[0];

	return (ndlp->nlp_state);
}

static uint32_t
lpfc_device_rm_npr_node(struct lpfc_hba * phba,
			    struct lpfc_nodelist * ndlp, void *arg,
			    uint32_t evt)
{
	lpfc_nlp_list(phba, ndlp, NLP_NO_LIST);
	return (NLP_STE_FREED_NODE);
}

static uint32_t
lpfc_device_recov_npr_node(struct lpfc_hba * phba,
			    struct lpfc_nodelist * ndlp, void *arg,
			    uint32_t evt)
{
	spin_lock_irq(phba->host->host_lock);
	ndlp->nlp_flag &= ~NLP_NPR_2B_DISC;
	spin_unlock_irq(phba->host->host_lock);
	return (ndlp->nlp_state);
}


/* This next section defines the NPort Discovery State Machine */

/* There are 4 different double linked lists nodelist entries can reside on.
 * The plogi list and adisc list are used when Link Up discovery or RSCN
 * processing is needed. Each list holds the nodes that we will send PLOGI
 * or ADISC on. These lists will keep track of what nodes will be effected
 * by an RSCN, or a Link Up (Typically, all nodes are effected on Link Up).
 * The unmapped_list will contain all nodes that we have successfully logged
 * into at the Fibre Channel level. The mapped_list will contain all nodes
 * that are mapped FCP targets.
 */
/*
 * The bind list is a list of undiscovered (potentially non-existent) nodes
 * that we have saved binding information on. This information is used when
 * nodes transition from the unmapped to the mapped list.
 */
/* For UNUSED_NODE state, the node has just been allocated .
 * For PLOGI_ISSUE and REG_LOGIN_ISSUE, the node is on
 * the PLOGI list. For REG_LOGIN_COMPL, the node is taken off the PLOGI list
 * and put on the unmapped list. For ADISC processing, the node is taken off
 * the ADISC list and placed on either the mapped or unmapped list (depending
 * on its previous state). Once on the unmapped list, a PRLI is issued and the
 * state changed to PRLI_ISSUE. When the PRLI completion occurs, the state is
 * changed to UNMAPPED_NODE. If the completion indicates a mapped
 * node, the node is taken off the unmapped list. The binding list is checked
 * for a valid binding, or a binding is automatically assigned. If binding
 * assignment is unsuccessful, the node is left on the unmapped list. If
 * binding assignment is successful, the associated binding list entry (if
 * any) is removed, and the node is placed on the mapped list.
 */
/*
 * For a Link Down, all nodes on the ADISC, PLOGI, unmapped or mapped
 * lists will receive a DEVICE_RECOVERY event. If the linkdown or nodev timers
 * expire, all effected nodes will receive a DEVICE_RM event.
 */
/*
 * For a Link Up or RSCN, all nodes will move from the mapped / unmapped lists
 * to either the ADISC or PLOGI list.  After a Nameserver query or ALPA loopmap
 * check, additional nodes may be added or removed (via DEVICE_RM) to / from
 * the PLOGI or ADISC lists. Once the PLOGI and ADISC lists are populated,
 * we will first process the ADISC list.  32 entries are processed initially and
 * ADISC is initited for each one.  Completions / Events for each node are
 * funnelled thru the state machine.  As each node finishes ADISC processing, it
 * starts ADISC for any nodes waiting for ADISC processing. If no nodes are
 * waiting, and the ADISC list count is identically 0, then we are done. For
 * Link Up discovery, since all nodes on the PLOGI list are UNREG_LOGIN'ed, we
 * can issue a CLEAR_LA and reenable Link Events. Next we will process the PLOGI
 * list.  32 entries are processed initially and PLOGI is initited for each one.
 * Completions / Events for each node are funnelled thru the state machine.  As
 * each node finishes PLOGI processing, it starts PLOGI for any nodes waiting
 * for PLOGI processing. If no nodes are waiting, and the PLOGI list count is
 * indentically 0, then we are done. We have now completed discovery / RSCN
 * handling. Upon completion, ALL nodes should be on either the mapped or
 * unmapped lists.
 */

static uint32_t (*lpfc_disc_action[NLP_STE_MAX_STATE * NLP_EVT_MAX_EVENT])
     (struct lpfc_hba *, struct lpfc_nodelist *, void *, uint32_t) = {
	/* Action routine                  Event       Current State  */
	lpfc_rcv_plogi_unused_node,	/* RCV_PLOGI   UNUSED_NODE    */
	lpfc_rcv_els_unused_node,	/* RCV_PRLI        */
	lpfc_rcv_logo_unused_node,	/* RCV_LOGO        */
	lpfc_rcv_els_unused_node,	/* RCV_ADISC       */
	lpfc_rcv_els_unused_node,	/* RCV_PDISC       */
	lpfc_rcv_els_unused_node,	/* RCV_PRLO        */
	lpfc_disc_illegal,		/* CMPL_PLOGI      */
	lpfc_disc_illegal,		/* CMPL_PRLI       */
	lpfc_cmpl_logo_unused_node,	/* CMPL_LOGO       */
	lpfc_disc_illegal,		/* CMPL_ADISC      */
	lpfc_disc_illegal,		/* CMPL_REG_LOGIN  */
	lpfc_device_rm_unused_node,	/* DEVICE_RM       */
	lpfc_disc_illegal,		/* DEVICE_RECOVERY */

	lpfc_rcv_plogi_plogi_issue,	/* RCV_PLOGI   PLOGI_ISSUE    */
	lpfc_rcv_els_plogi_issue,	/* RCV_PRLI        */
	lpfc_rcv_els_plogi_issue,	/* RCV_LOGO        */
	lpfc_rcv_els_plogi_issue,	/* RCV_ADISC       */
	lpfc_rcv_els_plogi_issue,	/* RCV_PDISC       */
	lpfc_rcv_els_plogi_issue,	/* RCV_PRLO        */
	lpfc_cmpl_plogi_plogi_issue,	/* CMPL_PLOGI      */
	lpfc_disc_illegal,		/* CMPL_PRLI       */
	lpfc_disc_illegal,		/* CMPL_LOGO       */
	lpfc_disc_illegal,		/* CMPL_ADISC      */
	lpfc_disc_illegal,		/* CMPL_REG_LOGIN  */
	lpfc_device_rm_plogi_issue,	/* DEVICE_RM       */
	lpfc_device_recov_plogi_issue,	/* DEVICE_RECOVERY */

	lpfc_rcv_plogi_adisc_issue,	/* RCV_PLOGI   ADISC_ISSUE    */
	lpfc_rcv_prli_adisc_issue,	/* RCV_PRLI        */
	lpfc_rcv_logo_adisc_issue,	/* RCV_LOGO        */
	lpfc_rcv_padisc_adisc_issue,	/* RCV_ADISC       */
	lpfc_rcv_padisc_adisc_issue,	/* RCV_PDISC       */
	lpfc_rcv_prlo_adisc_issue,	/* RCV_PRLO        */
	lpfc_disc_illegal,		/* CMPL_PLOGI      */
	lpfc_disc_illegal,		/* CMPL_PRLI       */
	lpfc_disc_illegal,		/* CMPL_LOGO       */
	lpfc_cmpl_adisc_adisc_issue,	/* CMPL_ADISC      */
	lpfc_disc_illegal,		/* CMPL_REG_LOGIN  */
	lpfc_device_rm_adisc_issue,	/* DEVICE_RM       */
	lpfc_device_recov_adisc_issue,	/* DEVICE_RECOVERY */

	lpfc_rcv_plogi_reglogin_issue,	/* RCV_PLOGI  REG_LOGIN_ISSUE */
	lpfc_rcv_prli_reglogin_issue,	/* RCV_PLOGI       */
	lpfc_rcv_logo_reglogin_issue,	/* RCV_LOGO        */
	lpfc_rcv_padisc_reglogin_issue,	/* RCV_ADISC       */
	lpfc_rcv_padisc_reglogin_issue,	/* RCV_PDISC       */
	lpfc_rcv_prlo_reglogin_issue,	/* RCV_PRLO        */
	lpfc_disc_illegal,		/* CMPL_PLOGI      */
	lpfc_disc_illegal,		/* CMPL_PRLI       */
	lpfc_disc_illegal,		/* CMPL_LOGO       */
	lpfc_disc_illegal,		/* CMPL_ADISC      */
	lpfc_cmpl_reglogin_reglogin_issue,/* CMPL_REG_LOGIN  */
	lpfc_device_rm_reglogin_issue,	/* DEVICE_RM       */
	lpfc_device_recov_reglogin_issue,/* DEVICE_RECOVERY */

	lpfc_rcv_plogi_prli_issue,	/* RCV_PLOGI   PRLI_ISSUE     */
	lpfc_rcv_prli_prli_issue,	/* RCV_PRLI        */
	lpfc_rcv_logo_prli_issue,	/* RCV_LOGO        */
	lpfc_rcv_padisc_prli_issue,	/* RCV_ADISC       */
	lpfc_rcv_padisc_prli_issue,	/* RCV_PDISC       */
	lpfc_rcv_prlo_prli_issue,	/* RCV_PRLO        */
	lpfc_disc_illegal,		/* CMPL_PLOGI      */
	lpfc_cmpl_prli_prli_issue,	/* CMPL_PRLI       */
	lpfc_disc_illegal,		/* CMPL_LOGO       */
	lpfc_disc_illegal,		/* CMPL_ADISC      */
	lpfc_disc_illegal,		/* CMPL_REG_LOGIN  */
	lpfc_device_rm_prli_issue,	/* DEVICE_RM       */
	lpfc_device_recov_prli_issue,	/* DEVICE_RECOVERY */

	lpfc_rcv_plogi_unmap_node,	/* RCV_PLOGI   UNMAPPED_NODE  */
	lpfc_rcv_prli_unmap_node,	/* RCV_PRLI        */
	lpfc_rcv_logo_unmap_node,	/* RCV_LOGO        */
	lpfc_rcv_padisc_unmap_node,	/* RCV_ADISC       */
	lpfc_rcv_padisc_unmap_node,	/* RCV_PDISC       */
	lpfc_rcv_prlo_unmap_node,	/* RCV_PRLO        */
	lpfc_disc_illegal,		/* CMPL_PLOGI      */
	lpfc_disc_illegal,		/* CMPL_PRLI       */
	lpfc_disc_illegal,		/* CMPL_LOGO       */
	lpfc_disc_illegal,		/* CMPL_ADISC      */
	lpfc_disc_illegal,		/* CMPL_REG_LOGIN  */
	lpfc_disc_illegal,		/* DEVICE_RM       */
	lpfc_device_recov_unmap_node,	/* DEVICE_RECOVERY */

	lpfc_rcv_plogi_mapped_node,	/* RCV_PLOGI   MAPPED_NODE    */
	lpfc_rcv_prli_mapped_node,	/* RCV_PRLI        */
	lpfc_rcv_logo_mapped_node,	/* RCV_LOGO        */
	lpfc_rcv_padisc_mapped_node,	/* RCV_ADISC       */
	lpfc_rcv_padisc_mapped_node,	/* RCV_PDISC       */
	lpfc_rcv_prlo_mapped_node,	/* RCV_PRLO        */
	lpfc_disc_illegal,		/* CMPL_PLOGI      */
	lpfc_disc_illegal,		/* CMPL_PRLI       */
	lpfc_disc_illegal,		/* CMPL_LOGO       */
	lpfc_disc_illegal,		/* CMPL_ADISC      */
	lpfc_disc_illegal,		/* CMPL_REG_LOGIN  */
	lpfc_disc_illegal,		/* DEVICE_RM       */
	lpfc_device_recov_mapped_node,	/* DEVICE_RECOVERY */

	lpfc_rcv_plogi_npr_node,        /* RCV_PLOGI   NPR_NODE    */
	lpfc_rcv_prli_npr_node,         /* RCV_PRLI        */
	lpfc_rcv_logo_npr_node,         /* RCV_LOGO        */
	lpfc_rcv_padisc_npr_node,       /* RCV_ADISC       */
	lpfc_rcv_padisc_npr_node,       /* RCV_PDISC       */
	lpfc_rcv_prlo_npr_node,         /* RCV_PRLO        */
	lpfc_disc_noop,			/* CMPL_PLOGI      */
	lpfc_disc_noop,			/* CMPL_PRLI       */
	lpfc_cmpl_logo_npr_node,        /* CMPL_LOGO       */
	lpfc_disc_noop,			/* CMPL_ADISC      */
	lpfc_cmpl_reglogin_npr_node,    /* CMPL_REG_LOGIN  */
	lpfc_device_rm_npr_node,        /* DEVICE_RM       */
	lpfc_device_recov_npr_node,     /* DEVICE_RECOVERY */
};

int
lpfc_disc_state_machine(struct lpfc_hba * phba,
			struct lpfc_nodelist * ndlp, void *arg, uint32_t evt)
{
	uint32_t cur_state, rc;
	uint32_t(*func) (struct lpfc_hba *, struct lpfc_nodelist *, void *,
			 uint32_t);

	ndlp->nlp_disc_refcnt++;
	cur_state = ndlp->nlp_state;

	/* DSM in event <evt> on NPort <nlp_DID> in state <cur_state> */
	lpfc_printf_log(phba,
			KERN_INFO,
			LOG_DISCOVERY,
			"%d:0211 DSM in event x%x on NPort x%x in state %d "
			"Data: x%x\n",
			phba->brd_no,
			evt, ndlp->nlp_DID, cur_state, ndlp->nlp_flag);

	func = lpfc_disc_action[(cur_state * NLP_EVT_MAX_EVENT) + evt];
	rc = (func) (phba, ndlp, arg, evt);

	/* DSM out state <rc> on NPort <nlp_DID> */
	lpfc_printf_log(phba,
		       KERN_INFO,
		       LOG_DISCOVERY,
		       "%d:0212 DSM out state %d on NPort x%x Data: x%x\n",
		       phba->brd_no,
		       rc, ndlp->nlp_DID, ndlp->nlp_flag);

	ndlp->nlp_disc_refcnt--;

	/* Check to see if ndlp removal is deferred */
	if ((ndlp->nlp_disc_refcnt == 0)
	    && (ndlp->nlp_flag & NLP_DELAY_REMOVE)) {
		spin_lock_irq(phba->host->host_lock);
		ndlp->nlp_flag &= ~NLP_DELAY_REMOVE;
		spin_unlock_irq(phba->host->host_lock);
		lpfc_nlp_remove(phba, ndlp);
		return (NLP_STE_FREED_NODE);
	}
	if (rc == NLP_STE_FREED_NODE)
		return (NLP_STE_FREED_NODE);
	ndlp->nlp_state = rc;
	return (rc);
}