[SCSI] bfa: Brocade BFA FC SCSI driver

Add new driver for Brocade Hardware

Signed-off-by: Jing Huang <huangj@brocade.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>

1 files changed, 1088 insertions, 0 deletions

diff --git a/drivers/scsi/bfa/bfa_itnim.c b/drivers/scsi/bfa/bfa_itnim.c
new file mode 100644
index 000000000000..4d5c61a4f85c
--- /dev/null
+++ b/drivers/scsi/bfa/bfa_itnim.c
@@ -0,0 +1,1088 @@
+/*
+ * Copyright (c) 2005-2009 Brocade Communications Systems, Inc.
+ * All rights reserved
+ * www.brocade.com
+ *
+ * Linux driver for Brocade Fibre Channel Host Bus Adapter.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License (GPL) Version 2 as
+ * published by the Free Software Foundation
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ */
+
+#include <bfa.h>
+#include <bfa_fcpim.h>
+#include "bfa_fcpim_priv.h"
+
+BFA_TRC_FILE(HAL, ITNIM);
+
+#define BFA_ITNIM_FROM_TAG(_fcpim, _tag)				\
+	((_fcpim)->itnim_arr + ((_tag) & ((_fcpim)->num_itnims - 1)))
+
+#define bfa_fcpim_additn(__itnim)					\
+	list_add_tail(&(__itnim)->qe, &(__itnim)->fcpim->itnim_q)
+#define bfa_fcpim_delitn(__itnim)	do {				\
+	bfa_assert(bfa_q_is_on_q(&(__itnim)->fcpim->itnim_q, __itnim));      \
+	list_del(&(__itnim)->qe);      \
+	bfa_assert(list_empty(&(__itnim)->io_q));      \
+	bfa_assert(list_empty(&(__itnim)->io_cleanup_q));      \
+	bfa_assert(list_empty(&(__itnim)->pending_q));      \
+} while (0)
+
+#define bfa_itnim_online_cb(__itnim) do {				\
+	if ((__itnim)->bfa->fcs)					\
+		bfa_cb_itnim_online((__itnim)->ditn);      \
+	else {								\
+		bfa_cb_queue((__itnim)->bfa, &(__itnim)->hcb_qe,	\
+		__bfa_cb_itnim_online, (__itnim));      \
+	}								\
+} while (0)
+
+#define bfa_itnim_offline_cb(__itnim) do {				\
+	if ((__itnim)->bfa->fcs)					\
+		bfa_cb_itnim_offline((__itnim)->ditn);      \
+	else {								\
+		bfa_cb_queue((__itnim)->bfa, &(__itnim)->hcb_qe,	\
+		__bfa_cb_itnim_offline, (__itnim));      \
+	}								\
+} while (0)
+
+#define bfa_itnim_sler_cb(__itnim) do {					\
+	if ((__itnim)->bfa->fcs)					\
+		bfa_cb_itnim_sler((__itnim)->ditn);      \
+	else {								\
+		bfa_cb_queue((__itnim)->bfa, &(__itnim)->hcb_qe,	\
+		__bfa_cb_itnim_sler, (__itnim));      \
+	}								\
+} while (0)
+
+/*
+ * forward declarations
+ */
+static void     bfa_itnim_iocdisable_cleanup(struct bfa_itnim_s *itnim);
+static bfa_boolean_t bfa_itnim_send_fwcreate(struct bfa_itnim_s *itnim);
+static bfa_boolean_t bfa_itnim_send_fwdelete(struct bfa_itnim_s *itnim);
+static void     bfa_itnim_cleanp_comp(void *itnim_cbarg);
+static void     bfa_itnim_cleanup(struct bfa_itnim_s *itnim);
+static void     __bfa_cb_itnim_online(void *cbarg, bfa_boolean_t complete);
+static void     __bfa_cb_itnim_offline(void *cbarg, bfa_boolean_t complete);
+static void     __bfa_cb_itnim_sler(void *cbarg, bfa_boolean_t complete);
+static void     bfa_itnim_iotov_online(struct bfa_itnim_s *itnim);
+static void     bfa_itnim_iotov_cleanup(struct bfa_itnim_s *itnim);
+static void     bfa_itnim_iotov(void *itnim_arg);
+static void     bfa_itnim_iotov_start(struct bfa_itnim_s *itnim);
+static void     bfa_itnim_iotov_stop(struct bfa_itnim_s *itnim);
+static void     bfa_itnim_iotov_delete(struct bfa_itnim_s *itnim);
+
+/**
+ *  bfa_itnim_sm BFA itnim state machine
+ */
+
+
+enum bfa_itnim_event {
+	BFA_ITNIM_SM_CREATE = 1,	/*  itnim is created */
+	BFA_ITNIM_SM_ONLINE = 2,	/*  itnim is online */
+	BFA_ITNIM_SM_OFFLINE = 3,	/*  itnim is offline */
+	BFA_ITNIM_SM_FWRSP = 4,		/*  firmware response */
+	BFA_ITNIM_SM_DELETE = 5,	/*  deleting an existing itnim */
+	BFA_ITNIM_SM_CLEANUP = 6,	/*  IO cleanup completion */
+	BFA_ITNIM_SM_SLER = 7,		/*  second level error recovery */
+	BFA_ITNIM_SM_HWFAIL = 8,	/*  IOC h/w failure event */
+	BFA_ITNIM_SM_QRESUME = 9,	/*  queue space available */
+};
+
+static void     bfa_itnim_sm_uninit(struct bfa_itnim_s *itnim,
+					enum bfa_itnim_event event);
+static void     bfa_itnim_sm_created(struct bfa_itnim_s *itnim,
+					 enum bfa_itnim_event event);
+static void     bfa_itnim_sm_fwcreate(struct bfa_itnim_s *itnim,
+					  enum bfa_itnim_event event);
+static void	bfa_itnim_sm_delete_pending(struct bfa_itnim_s *itnim,
+				enum bfa_itnim_event event);
+static void     bfa_itnim_sm_online(struct bfa_itnim_s *itnim,
+					enum bfa_itnim_event event);
+static void     bfa_itnim_sm_sler(struct bfa_itnim_s *itnim,
+				      enum bfa_itnim_event event);
+static void     bfa_itnim_sm_cleanup_offline(struct bfa_itnim_s *itnim,
+						 enum bfa_itnim_event event);
+static void     bfa_itnim_sm_cleanup_delete(struct bfa_itnim_s *itnim,
+						enum bfa_itnim_event event);
+static void     bfa_itnim_sm_fwdelete(struct bfa_itnim_s *itnim,
+					  enum bfa_itnim_event event);
+static void     bfa_itnim_sm_offline(struct bfa_itnim_s *itnim,
+					 enum bfa_itnim_event event);
+static void     bfa_itnim_sm_iocdisable(struct bfa_itnim_s *itnim,
+					    enum bfa_itnim_event event);
+static void     bfa_itnim_sm_deleting(struct bfa_itnim_s *itnim,
+					  enum bfa_itnim_event event);
+static void     bfa_itnim_sm_fwcreate_qfull(struct bfa_itnim_s *itnim,
+					  enum bfa_itnim_event event);
+static void     bfa_itnim_sm_fwdelete_qfull(struct bfa_itnim_s *itnim,
+					  enum bfa_itnim_event event);
+static void     bfa_itnim_sm_deleting_qfull(struct bfa_itnim_s *itnim,
+					  enum bfa_itnim_event event);
+
+/**
+ * 		Beginning/unallocated state - no events expected.
+ */
+static void
+bfa_itnim_sm_uninit(struct bfa_itnim_s *itnim, enum bfa_itnim_event event)
+{
+	bfa_trc(itnim->bfa, itnim->rport->rport_tag);
+	bfa_trc(itnim->bfa, event);
+
+	switch (event) {
+	case BFA_ITNIM_SM_CREATE:
+		bfa_sm_set_state(itnim, bfa_itnim_sm_created);
+		itnim->is_online = BFA_FALSE;
+		bfa_fcpim_additn(itnim);
+		break;
+
+	default:
+		bfa_assert(0);
+	}
+}
+
+/**
+ * 		Beginning state, only online event expected.
+ */
+static void
+bfa_itnim_sm_created(struct bfa_itnim_s *itnim, enum bfa_itnim_event event)
+{
+	bfa_trc(itnim->bfa, itnim->rport->rport_tag);
+	bfa_trc(itnim->bfa, event);
+
+	switch (event) {
+	case BFA_ITNIM_SM_ONLINE:
+		if (bfa_itnim_send_fwcreate(itnim))
+			bfa_sm_set_state(itnim, bfa_itnim_sm_fwcreate);
+		else
+			bfa_sm_set_state(itnim, bfa_itnim_sm_fwcreate_qfull);
+		break;
+
+	case BFA_ITNIM_SM_DELETE:
+		bfa_sm_set_state(itnim, bfa_itnim_sm_uninit);
+		bfa_fcpim_delitn(itnim);
+		break;
+
+	case BFA_ITNIM_SM_HWFAIL:
+		bfa_sm_set_state(itnim, bfa_itnim_sm_iocdisable);
+		break;
+
+	default:
+		bfa_assert(0);
+	}
+}
+
+/**
+ * 		Waiting for itnim create response from firmware.
+ */
+static void
+bfa_itnim_sm_fwcreate(struct bfa_itnim_s *itnim, enum bfa_itnim_event event)
+{
+	bfa_trc(itnim->bfa, itnim->rport->rport_tag);
+	bfa_trc(itnim->bfa, event);
+
+	switch (event) {
+	case BFA_ITNIM_SM_FWRSP:
+		bfa_sm_set_state(itnim, bfa_itnim_sm_online);
+		itnim->is_online = BFA_TRUE;
+		bfa_itnim_iotov_online(itnim);
+		bfa_itnim_online_cb(itnim);
+		break;
+
+	case BFA_ITNIM_SM_DELETE:
+		bfa_sm_set_state(itnim, bfa_itnim_sm_delete_pending);
+		break;
+
+	case BFA_ITNIM_SM_OFFLINE:
+		if (bfa_itnim_send_fwdelete(itnim))
+			bfa_sm_set_state(itnim, bfa_itnim_sm_fwdelete);
+		else
+			bfa_sm_set_state(itnim, bfa_itnim_sm_fwdelete_qfull);
+		break;
+
+	case BFA_ITNIM_SM_HWFAIL:
+		bfa_sm_set_state(itnim, bfa_itnim_sm_iocdisable);
+		break;
+
+	default:
+		bfa_assert(0);
+	}
+}
+
+static void
+bfa_itnim_sm_fwcreate_qfull(struct bfa_itnim_s *itnim,
+			enum bfa_itnim_event event)
+{
+	bfa_trc(itnim->bfa, itnim->rport->rport_tag);
+	bfa_trc(itnim->bfa, event);
+
+	switch (event) {
+	case BFA_ITNIM_SM_QRESUME:
+		bfa_sm_set_state(itnim, bfa_itnim_sm_fwcreate);
+		bfa_itnim_send_fwcreate(itnim);
+		break;
+
+	case BFA_ITNIM_SM_DELETE:
+		bfa_sm_set_state(itnim, bfa_itnim_sm_uninit);
+		bfa_reqq_wcancel(&itnim->reqq_wait);
+		bfa_fcpim_delitn(itnim);
+		break;
+
+	case BFA_ITNIM_SM_OFFLINE:
+		bfa_sm_set_state(itnim, bfa_itnim_sm_offline);
+		bfa_reqq_wcancel(&itnim->reqq_wait);
+		bfa_itnim_offline_cb(itnim);
+		break;
+
+	case BFA_ITNIM_SM_HWFAIL:
+		bfa_sm_set_state(itnim, bfa_itnim_sm_iocdisable);
+		bfa_reqq_wcancel(&itnim->reqq_wait);
+		break;
+
+	default:
+		bfa_assert(0);
+	}
+}
+
+/**
+ * 	Waiting for itnim create response from firmware, a delete is pending.
+ */
+static void
+bfa_itnim_sm_delete_pending(struct bfa_itnim_s *itnim,
+				enum bfa_itnim_event event)
+{
+	bfa_trc(itnim->bfa, itnim->rport->rport_tag);
+	bfa_trc(itnim->bfa, event);
+
+	switch (event) {
+	case BFA_ITNIM_SM_FWRSP:
+		if (bfa_itnim_send_fwdelete(itnim))
+			bfa_sm_set_state(itnim, bfa_itnim_sm_deleting);
+		else
+			bfa_sm_set_state(itnim, bfa_itnim_sm_deleting_qfull);
+		break;
+
+	case BFA_ITNIM_SM_HWFAIL:
+		bfa_sm_set_state(itnim, bfa_itnim_sm_uninit);
+		bfa_fcpim_delitn(itnim);
+		break;
+
+	default:
+		bfa_assert(0);
+	}
+}
+
+/**
+ * 		Online state - normal parking state.
+ */
+static void
+bfa_itnim_sm_online(struct bfa_itnim_s *itnim, enum bfa_itnim_event event)
+{
+	bfa_trc(itnim->bfa, itnim->rport->rport_tag);
+	bfa_trc(itnim->bfa, event);
+
+	switch (event) {
+	case BFA_ITNIM_SM_OFFLINE:
+		bfa_sm_set_state(itnim, bfa_itnim_sm_cleanup_offline);
+		itnim->is_online = BFA_FALSE;
+		bfa_itnim_iotov_start(itnim);
+		bfa_itnim_cleanup(itnim);
+		break;
+
+	case BFA_ITNIM_SM_DELETE:
+		bfa_sm_set_state(itnim, bfa_itnim_sm_cleanup_delete);
+		itnim->is_online = BFA_FALSE;
+		bfa_itnim_cleanup(itnim);
+		break;
+
+	case BFA_ITNIM_SM_SLER:
+		bfa_sm_set_state(itnim, bfa_itnim_sm_sler);
+		itnim->is_online = BFA_FALSE;
+		bfa_itnim_iotov_start(itnim);
+		bfa_itnim_sler_cb(itnim);
+		break;
+
+	case BFA_ITNIM_SM_HWFAIL:
+		bfa_sm_set_state(itnim, bfa_itnim_sm_iocdisable);
+		itnim->is_online = BFA_FALSE;
+		bfa_itnim_iotov_start(itnim);
+		bfa_itnim_iocdisable_cleanup(itnim);
+		break;
+
+	default:
+		bfa_assert(0);
+	}
+}
+
+/**
+ * 		Second level error recovery need.
+ */
+static void
+bfa_itnim_sm_sler(struct bfa_itnim_s *itnim, enum bfa_itnim_event event)
+{
+	bfa_trc(itnim->bfa, itnim->rport->rport_tag);
+	bfa_trc(itnim->bfa, event);
+
+	switch (event) {
+	case BFA_ITNIM_SM_OFFLINE:
+		bfa_sm_set_state(itnim, bfa_itnim_sm_cleanup_offline);
+		bfa_itnim_cleanup(itnim);
+		break;
+
+	case BFA_ITNIM_SM_DELETE:
+		bfa_sm_set_state(itnim, bfa_itnim_sm_cleanup_delete);
+		bfa_itnim_cleanup(itnim);
+		bfa_itnim_iotov_delete(itnim);
+		break;
+
+	case BFA_ITNIM_SM_HWFAIL:
+		bfa_sm_set_state(itnim, bfa_itnim_sm_iocdisable);
+		bfa_itnim_iocdisable_cleanup(itnim);
+		break;
+
+	default:
+		bfa_assert(0);
+	}
+}
+
+/**
+ * 		Going offline. Waiting for active IO cleanup.
+ */
+static void
+bfa_itnim_sm_cleanup_offline(struct bfa_itnim_s *itnim,
+				 enum bfa_itnim_event event)
+{
+	bfa_trc(itnim->bfa, itnim->rport->rport_tag);
+	bfa_trc(itnim->bfa, event);
+
+	switch (event) {
+	case BFA_ITNIM_SM_CLEANUP:
+		if (bfa_itnim_send_fwdelete(itnim))
+			bfa_sm_set_state(itnim, bfa_itnim_sm_fwdelete);
+		else
+			bfa_sm_set_state(itnim, bfa_itnim_sm_fwdelete_qfull);
+		break;
+
+	case BFA_ITNIM_SM_DELETE:
+		bfa_sm_set_state(itnim, bfa_itnim_sm_cleanup_delete);
+		bfa_itnim_iotov_delete(itnim);
+		break;
+
+	case BFA_ITNIM_SM_HWFAIL:
+		bfa_sm_set_state(itnim, bfa_itnim_sm_iocdisable);
+		bfa_itnim_iocdisable_cleanup(itnim);
+		bfa_itnim_offline_cb(itnim);
+		break;
+
+	case BFA_ITNIM_SM_SLER:
+		break;
+
+	default:
+		bfa_assert(0);
+	}
+}
+
+/**
+ * 		Deleting itnim. Waiting for active IO cleanup.
+ */
+static void
+bfa_itnim_sm_cleanup_delete(struct bfa_itnim_s *itnim,
+				enum bfa_itnim_event event)
+{
+	bfa_trc(itnim->bfa, itnim->rport->rport_tag);
+	bfa_trc(itnim->bfa, event);
+
+	switch (event) {
+	case BFA_ITNIM_SM_CLEANUP:
+		if (bfa_itnim_send_fwdelete(itnim))
+			bfa_sm_set_state(itnim, bfa_itnim_sm_deleting);
+		else
+			bfa_sm_set_state(itnim, bfa_itnim_sm_deleting_qfull);
+		break;
+
+	case BFA_ITNIM_SM_HWFAIL:
+		bfa_sm_set_state(itnim, bfa_itnim_sm_iocdisable);
+		bfa_itnim_iocdisable_cleanup(itnim);
+		break;
+
+	default:
+		bfa_assert(0);
+	}
+}
+
+/**
+ * Rport offline. Fimrware itnim is being deleted - awaiting f/w response.
+ */
+static void
+bfa_itnim_sm_fwdelete(struct bfa_itnim_s *itnim, enum bfa_itnim_event event)
+{
+	bfa_trc(itnim->bfa, itnim->rport->rport_tag);
+	bfa_trc(itnim->bfa, event);
+
+	switch (event) {
+	case BFA_ITNIM_SM_FWRSP:
+		bfa_sm_set_state(itnim, bfa_itnim_sm_offline);
+		bfa_itnim_offline_cb(itnim);
+		break;
+
+	case BFA_ITNIM_SM_DELETE:
+		bfa_sm_set_state(itnim, bfa_itnim_sm_deleting);
+		break;
+
+	case BFA_ITNIM_SM_HWFAIL:
+		bfa_sm_set_state(itnim, bfa_itnim_sm_iocdisable);
+		bfa_itnim_offline_cb(itnim);
+		break;
+
+	default:
+		bfa_assert(0);
+	}
+}
+
+static void
+bfa_itnim_sm_fwdelete_qfull(struct bfa_itnim_s *itnim,
+			enum bfa_itnim_event event)
+{
+	bfa_trc(itnim->bfa, itnim->rport->rport_tag);
+	bfa_trc(itnim->bfa, event);
+
+	switch (event) {
+	case BFA_ITNIM_SM_QRESUME:
+		bfa_sm_set_state(itnim, bfa_itnim_sm_fwdelete);
+		bfa_itnim_send_fwdelete(itnim);
+		break;
+
+	case BFA_ITNIM_SM_DELETE:
+		bfa_sm_set_state(itnim, bfa_itnim_sm_deleting_qfull);
+		break;
+
+	case BFA_ITNIM_SM_HWFAIL:
+		bfa_sm_set_state(itnim, bfa_itnim_sm_iocdisable);
+		bfa_reqq_wcancel(&itnim->reqq_wait);
+		bfa_itnim_offline_cb(itnim);
+		break;
+
+	default:
+		bfa_assert(0);
+	}
+}
+
+/**
+ * 		Offline state.
+ */
+static void
+bfa_itnim_sm_offline(struct bfa_itnim_s *itnim, enum bfa_itnim_event event)
+{
+	bfa_trc(itnim->bfa, itnim->rport->rport_tag);
+	bfa_trc(itnim->bfa, event);
+
+	switch (event) {
+	case BFA_ITNIM_SM_DELETE:
+		bfa_sm_set_state(itnim, bfa_itnim_sm_uninit);
+		bfa_itnim_iotov_delete(itnim);
+		bfa_fcpim_delitn(itnim);
+		break;
+
+	case BFA_ITNIM_SM_ONLINE:
+		if (bfa_itnim_send_fwcreate(itnim))
+			bfa_sm_set_state(itnim, bfa_itnim_sm_fwcreate);
+		else
+			bfa_sm_set_state(itnim, bfa_itnim_sm_fwcreate_qfull);
+		break;
+
+	case BFA_ITNIM_SM_HWFAIL:
+		bfa_sm_set_state(itnim, bfa_itnim_sm_iocdisable);
+		break;
+
+	default:
+		bfa_assert(0);
+	}
+}
+
+/**
+ * 		IOC h/w failed state.
+ */
+static void
+bfa_itnim_sm_iocdisable(struct bfa_itnim_s *itnim,
+			    enum bfa_itnim_event event)
+{
+	bfa_trc(itnim->bfa, itnim->rport->rport_tag);
+	bfa_trc(itnim->bfa, event);
+
+	switch (event) {
+	case BFA_ITNIM_SM_DELETE:
+		bfa_sm_set_state(itnim, bfa_itnim_sm_uninit);
+		bfa_itnim_iotov_delete(itnim);
+		bfa_fcpim_delitn(itnim);
+		break;
+
+	case BFA_ITNIM_SM_OFFLINE:
+		bfa_itnim_offline_cb(itnim);
+		break;
+
+	case BFA_ITNIM_SM_ONLINE:
+		if (bfa_itnim_send_fwcreate(itnim))
+			bfa_sm_set_state(itnim, bfa_itnim_sm_fwcreate);
+		else
+			bfa_sm_set_state(itnim, bfa_itnim_sm_fwcreate_qfull);
+		break;
+
+	case BFA_ITNIM_SM_HWFAIL:
+		break;
+
+	default:
+		bfa_assert(0);
+	}
+}
+
+/**
+ * 		Itnim is deleted, waiting for firmware response to delete.
+ */
+static void
+bfa_itnim_sm_deleting(struct bfa_itnim_s *itnim, enum bfa_itnim_event event)
+{
+	bfa_trc(itnim->bfa, itnim->rport->rport_tag);
+	bfa_trc(itnim->bfa, event);
+
+	switch (event) {
+	case BFA_ITNIM_SM_FWRSP:
+	case BFA_ITNIM_SM_HWFAIL:
+		bfa_sm_set_state(itnim, bfa_itnim_sm_uninit);
+		bfa_fcpim_delitn(itnim);
+		break;
+
+	default:
+		bfa_assert(0);
+	}
+}
+
+static void
+bfa_itnim_sm_deleting_qfull(struct bfa_itnim_s *itnim,
+			enum bfa_itnim_event event)
+{
+	bfa_trc(itnim->bfa, itnim->rport->rport_tag);
+	bfa_trc(itnim->bfa, event);
+
+	switch (event) {
+	case BFA_ITNIM_SM_QRESUME:
+		bfa_sm_set_state(itnim, bfa_itnim_sm_deleting);
+		bfa_itnim_send_fwdelete(itnim);
+		break;
+
+	case BFA_ITNIM_SM_HWFAIL:
+		bfa_sm_set_state(itnim, bfa_itnim_sm_uninit);
+		bfa_reqq_wcancel(&itnim->reqq_wait);
+		bfa_fcpim_delitn(itnim);
+		break;
+
+	default:
+		bfa_assert(0);
+	}
+}
+
+
+
+/**
+ *  bfa_itnim_private
+ */
+
+/**
+ * 		Initiate cleanup of all IOs on an IOC failure.
+ */
+static void
+bfa_itnim_iocdisable_cleanup(struct bfa_itnim_s *itnim)
+{
+	struct bfa_tskim_s *tskim;
+	struct bfa_ioim_s *ioim;
+	struct list_head        *qe, *qen;
+
+	list_for_each_safe(qe, qen, &itnim->tsk_q) {
+		tskim = (struct bfa_tskim_s *) qe;
+		bfa_tskim_iocdisable(tskim);
+	}
+
+	list_for_each_safe(qe, qen, &itnim->io_q) {
+		ioim = (struct bfa_ioim_s *) qe;
+		bfa_ioim_iocdisable(ioim);
+	}
+
+	/**
+	 * For IO request in pending queue, we pretend an early timeout.
+	 */
+	list_for_each_safe(qe, qen, &itnim->pending_q) {
+		ioim = (struct bfa_ioim_s *) qe;
+		bfa_ioim_tov(ioim);
+	}
+
+	list_for_each_safe(qe, qen, &itnim->io_cleanup_q) {
+		ioim = (struct bfa_ioim_s *) qe;
+		bfa_ioim_iocdisable(ioim);
+	}
+}
+
+/**
+ * 		IO cleanup completion
+ */
+static void
+bfa_itnim_cleanp_comp(void *itnim_cbarg)
+{
+	struct bfa_itnim_s *itnim = itnim_cbarg;
+
+	bfa_stats(itnim, cleanup_comps);
+	bfa_sm_send_event(itnim, BFA_ITNIM_SM_CLEANUP);
+}
+
+/**
+ * 		Initiate cleanup of all IOs.
+ */
+static void
+bfa_itnim_cleanup(struct bfa_itnim_s *itnim)
+{
+	struct bfa_ioim_s  *ioim;
+	struct bfa_tskim_s *tskim;
+	struct list_head         *qe, *qen;
+
+	bfa_wc_init(&itnim->wc, bfa_itnim_cleanp_comp, itnim);
+
+	list_for_each_safe(qe, qen, &itnim->io_q) {
+		ioim = (struct bfa_ioim_s *) qe;
+
+		/**
+		 * Move IO to a cleanup queue from active queue so that a later
+		 * TM will not pickup this IO.
+		 */
+		list_del(&ioim->qe);
+		list_add_tail(&ioim->qe, &itnim->io_cleanup_q);
+
+		bfa_wc_up(&itnim->wc);
+		bfa_ioim_cleanup(ioim);
+	}
+
+	list_for_each_safe(qe, qen, &itnim->tsk_q) {
+		tskim = (struct bfa_tskim_s *) qe;
+		bfa_wc_up(&itnim->wc);
+		bfa_tskim_cleanup(tskim);
+	}
+
+	bfa_wc_wait(&itnim->wc);
+}
+
+static void
+__bfa_cb_itnim_online(void *cbarg, bfa_boolean_t complete)
+{
+	struct bfa_itnim_s *itnim = cbarg;
+
+	if (complete)
+		bfa_cb_itnim_online(itnim->ditn);
+}
+
+static void
+__bfa_cb_itnim_offline(void *cbarg, bfa_boolean_t complete)
+{
+	struct bfa_itnim_s *itnim = cbarg;
+
+	if (complete)
+		bfa_cb_itnim_offline(itnim->ditn);
+}
+
+static void
+__bfa_cb_itnim_sler(void *cbarg, bfa_boolean_t complete)
+{
+	struct bfa_itnim_s *itnim = cbarg;
+
+	if (complete)
+		bfa_cb_itnim_sler(itnim->ditn);
+}
+
+/**
+ * Call to resume any I/O requests waiting for room in request queue.
+ */
+static void
+bfa_itnim_qresume(void *cbarg)
+{
+	struct bfa_itnim_s *itnim = cbarg;
+
+	bfa_sm_send_event(itnim, BFA_ITNIM_SM_QRESUME);
+}
+
+
+
+
+/**
+ *  bfa_itnim_public
+ */
+
+void
+bfa_itnim_iodone(struct bfa_itnim_s *itnim)
+{
+	bfa_wc_down(&itnim->wc);
+}
+
+void
+bfa_itnim_tskdone(struct bfa_itnim_s *itnim)
+{
+	bfa_wc_down(&itnim->wc);
+}
+
+void
+bfa_itnim_meminfo(struct bfa_iocfc_cfg_s *cfg, u32 *km_len,
+		u32 *dm_len)
+{
+	/**
+	 * ITN memory
+	 */
+	*km_len += cfg->fwcfg.num_rports * sizeof(struct bfa_itnim_s);
+}
+
+void
+bfa_itnim_attach(struct bfa_fcpim_mod_s *fcpim, struct bfa_meminfo_s *minfo)
+{
+	struct bfa_s      *bfa = fcpim->bfa;
+	struct bfa_itnim_s *itnim;
+	int             i;
+
+	INIT_LIST_HEAD(&fcpim->itnim_q);
+
+	itnim = (struct bfa_itnim_s *) bfa_meminfo_kva(minfo);
+	fcpim->itnim_arr = itnim;
+
+	for (i = 0; i < fcpim->num_itnims; i++, itnim++) {
+		bfa_os_memset(itnim, 0, sizeof(struct bfa_itnim_s));
+		itnim->bfa = bfa;
+		itnim->fcpim = fcpim;
+		itnim->reqq = BFA_REQQ_QOS_LO;
+		itnim->rport = BFA_RPORT_FROM_TAG(bfa, i);
+		itnim->iotov_active = BFA_FALSE;
+		bfa_reqq_winit(&itnim->reqq_wait, bfa_itnim_qresume, itnim);
+
+		INIT_LIST_HEAD(&itnim->io_q);
+		INIT_LIST_HEAD(&itnim->io_cleanup_q);
+		INIT_LIST_HEAD(&itnim->pending_q);
+		INIT_LIST_HEAD(&itnim->tsk_q);
+		INIT_LIST_HEAD(&itnim->delay_comp_q);
+		bfa_sm_set_state(itnim, bfa_itnim_sm_uninit);
+	}
+
+	bfa_meminfo_kva(minfo) = (u8 *) itnim;
+}
+
+void
+bfa_itnim_iocdisable(struct bfa_itnim_s *itnim)
+{
+	bfa_stats(itnim, ioc_disabled);
+	bfa_sm_send_event(itnim, BFA_ITNIM_SM_HWFAIL);
+}
+
+static bfa_boolean_t
+bfa_itnim_send_fwcreate(struct bfa_itnim_s *itnim)
+{
+	struct bfi_itnim_create_req_s *m;
+
+	itnim->msg_no++;
+
+	/**
+	 * check for room in queue to send request now
+	 */
+	m = bfa_reqq_next(itnim->bfa, itnim->reqq);
+	if (!m) {
+		bfa_reqq_wait(itnim->bfa, itnim->reqq, &itnim->reqq_wait);
+		return BFA_FALSE;
+	}
+
+	bfi_h2i_set(m->mh, BFI_MC_ITNIM, BFI_ITNIM_H2I_CREATE_REQ,
+			bfa_lpuid(itnim->bfa));
+	m->fw_handle = itnim->rport->fw_handle;
+	m->class = FC_CLASS_3;
+	m->seq_rec = itnim->seq_rec;
+	m->msg_no = itnim->msg_no;
+
+	/**
+	 * queue I/O message to firmware
+	 */
+	bfa_reqq_produce(itnim->bfa, itnim->reqq);
+	return BFA_TRUE;
+}
+
+static bfa_boolean_t
+bfa_itnim_send_fwdelete(struct bfa_itnim_s *itnim)
+{
+	struct bfi_itnim_delete_req_s *m;
+
+	/**
+	 * check for room in queue to send request now
+	 */
+	m = bfa_reqq_next(itnim->bfa, itnim->reqq);
+	if (!m) {
+		bfa_reqq_wait(itnim->bfa, itnim->reqq, &itnim->reqq_wait);
+		return BFA_FALSE;
+	}
+
+	bfi_h2i_set(m->mh, BFI_MC_ITNIM, BFI_ITNIM_H2I_DELETE_REQ,
+			bfa_lpuid(itnim->bfa));
+	m->fw_handle = itnim->rport->fw_handle;
+
+	/**
+	 * queue I/O message to firmware
+	 */
+	bfa_reqq_produce(itnim->bfa, itnim->reqq);
+	return BFA_TRUE;
+}
+
+/**
+ * Cleanup all pending failed inflight requests.
+ */
+static void
+bfa_itnim_delayed_comp(struct bfa_itnim_s *itnim, bfa_boolean_t iotov)
+{
+	struct bfa_ioim_s *ioim;
+	struct list_head *qe, *qen;
+
+	list_for_each_safe(qe, qen, &itnim->delay_comp_q) {
+		ioim = (struct bfa_ioim_s *)qe;
+		bfa_ioim_delayed_comp(ioim, iotov);
+	}
+}
+
+/**
+ * Start all pending IO requests.
+ */
+static void
+bfa_itnim_iotov_online(struct bfa_itnim_s *itnim)
+{
+	struct bfa_ioim_s *ioim;
+
+	bfa_itnim_iotov_stop(itnim);
+
+	/**
+	 * Abort all inflight IO requests in the queue
+	 */
+	bfa_itnim_delayed_comp(itnim, BFA_FALSE);
+
+	/**
+	 * Start all pending IO requests.
+	 */
+	while (!list_empty(&itnim->pending_q)) {
+		bfa_q_deq(&itnim->pending_q, &ioim);
+		list_add_tail(&ioim->qe, &itnim->io_q);
+		bfa_ioim_start(ioim);
+	}
+}
+
+/**
+ * Fail all pending IO requests
+ */
+static void
+bfa_itnim_iotov_cleanup(struct bfa_itnim_s *itnim)
+{
+	struct bfa_ioim_s *ioim;
+
+	/**
+	 * Fail all inflight IO requests in the queue
+	 */
+	bfa_itnim_delayed_comp(itnim, BFA_TRUE);
+
+	/**
+	 * Fail any pending IO requests.
+	 */
+	while (!list_empty(&itnim->pending_q)) {
+		bfa_q_deq(&itnim->pending_q, &ioim);
+		list_add_tail(&ioim->qe, &ioim->fcpim->ioim_comp_q);
+		bfa_ioim_tov(ioim);
+	}
+}
+
+/**
+ * IO TOV timer callback. Fail any pending IO requests.
+ */
+static void
+bfa_itnim_iotov(void *itnim_arg)
+{
+	struct bfa_itnim_s *itnim = itnim_arg;
+
+	itnim->iotov_active = BFA_FALSE;
+
+	bfa_cb_itnim_tov_begin(itnim->ditn);
+	bfa_itnim_iotov_cleanup(itnim);
+	bfa_cb_itnim_tov(itnim->ditn);
+}
+
+/**
+ * Start IO TOV timer for failing back pending IO requests in offline state.
+ */
+static void
+bfa_itnim_iotov_start(struct bfa_itnim_s *itnim)
+{
+	if (itnim->fcpim->path_tov > 0) {
+
+		itnim->iotov_active = BFA_TRUE;
+		bfa_assert(bfa_itnim_hold_io(itnim));
+		bfa_timer_start(itnim->bfa, &itnim->timer,
+			bfa_itnim_iotov, itnim, itnim->fcpim->path_tov);
+	}
+}
+
+/**
+ * Stop IO TOV timer.
+ */
+static void
+bfa_itnim_iotov_stop(struct bfa_itnim_s *itnim)
+{
+	if (itnim->iotov_active) {
+		itnim->iotov_active = BFA_FALSE;
+		bfa_timer_stop(&itnim->timer);
+	}
+}
+
+/**
+ * Stop IO TOV timer.
+ */
+static void
+bfa_itnim_iotov_delete(struct bfa_itnim_s *itnim)
+{
+    bfa_boolean_t pathtov_active = BFA_FALSE;
+
+    if (itnim->iotov_active)
+		pathtov_active = BFA_TRUE;
+
+	bfa_itnim_iotov_stop(itnim);
+	if (pathtov_active)
+		bfa_cb_itnim_tov_begin(itnim->ditn);
+	bfa_itnim_iotov_cleanup(itnim);
+	if (pathtov_active)
+		bfa_cb_itnim_tov(itnim->ditn);
+}
+
+
+
+/**
+ *  bfa_itnim_public
+ */
+
+/**
+ * 		Itnim interrupt processing.
+ */
+void
+bfa_itnim_isr(struct bfa_s *bfa, struct bfi_msg_s *m)
+{
+	struct bfa_fcpim_mod_s *fcpim = BFA_FCPIM_MOD(bfa);
+	union bfi_itnim_i2h_msg_u msg;
+	struct bfa_itnim_s *itnim;
+
+	bfa_trc(bfa, m->mhdr.msg_id);
+
+	msg.msg = m;
+
+	switch (m->mhdr.msg_id) {
+	case BFI_ITNIM_I2H_CREATE_RSP:
+		itnim = BFA_ITNIM_FROM_TAG(fcpim,
+					       msg.create_rsp->bfa_handle);
+		bfa_assert(msg.create_rsp->status == BFA_STATUS_OK);
+		bfa_stats(itnim, create_comps);
+		bfa_sm_send_event(itnim, BFA_ITNIM_SM_FWRSP);
+		break;
+
+	case BFI_ITNIM_I2H_DELETE_RSP:
+		itnim = BFA_ITNIM_FROM_TAG(fcpim,
+					       msg.delete_rsp->bfa_handle);
+		bfa_assert(msg.delete_rsp->status == BFA_STATUS_OK);
+		bfa_stats(itnim, delete_comps);
+		bfa_sm_send_event(itnim, BFA_ITNIM_SM_FWRSP);
+		break;
+
+	case BFI_ITNIM_I2H_SLER_EVENT:
+		itnim = BFA_ITNIM_FROM_TAG(fcpim,
+					       msg.sler_event->bfa_handle);
+		bfa_stats(itnim, sler_events);
+		bfa_sm_send_event(itnim, BFA_ITNIM_SM_SLER);
+		break;
+
+	default:
+		bfa_trc(bfa, m->mhdr.msg_id);
+		bfa_assert(0);
+	}
+}
+
+
+
+/**
+ *  bfa_itnim_api
+ */
+
+struct bfa_itnim_s *
+bfa_itnim_create(struct bfa_s *bfa, struct bfa_rport_s *rport, void *ditn)
+{
+	struct bfa_fcpim_mod_s *fcpim = BFA_FCPIM_MOD(bfa);
+	struct bfa_itnim_s *itnim;
+
+	itnim = BFA_ITNIM_FROM_TAG(fcpim, rport->rport_tag);
+	bfa_assert(itnim->rport == rport);
+
+	itnim->ditn = ditn;
+
+	bfa_stats(itnim, creates);
+	bfa_sm_send_event(itnim, BFA_ITNIM_SM_CREATE);
+
+	return (itnim);
+}
+
+void
+bfa_itnim_delete(struct bfa_itnim_s *itnim)
+{
+	bfa_stats(itnim, deletes);
+	bfa_sm_send_event(itnim, BFA_ITNIM_SM_DELETE);
+}
+
+void
+bfa_itnim_online(struct bfa_itnim_s *itnim, bfa_boolean_t seq_rec)
+{
+	itnim->seq_rec = seq_rec;
+	bfa_stats(itnim, onlines);
+	bfa_sm_send_event(itnim, BFA_ITNIM_SM_ONLINE);
+}
+
+void
+bfa_itnim_offline(struct bfa_itnim_s *itnim)
+{
+	bfa_stats(itnim, offlines);
+	bfa_sm_send_event(itnim, BFA_ITNIM_SM_OFFLINE);
+}
+
+/**
+ * Return true if itnim is considered offline for holding off IO request.
+ * IO is not held if itnim is being deleted.
+ */
+bfa_boolean_t
+bfa_itnim_hold_io(struct bfa_itnim_s *itnim)
+{
+	return (
+		itnim->fcpim->path_tov && itnim->iotov_active &&
+		(bfa_sm_cmp_state(itnim, bfa_itnim_sm_fwcreate) ||
+		 bfa_sm_cmp_state(itnim, bfa_itnim_sm_sler) ||
+		 bfa_sm_cmp_state(itnim, bfa_itnim_sm_cleanup_offline) ||
+		 bfa_sm_cmp_state(itnim, bfa_itnim_sm_fwdelete) ||
+		 bfa_sm_cmp_state(itnim, bfa_itnim_sm_offline) ||
+		 bfa_sm_cmp_state(itnim, bfa_itnim_sm_iocdisable))
+);
+}
+
+void
+bfa_itnim_get_stats(struct bfa_itnim_s *itnim,
+	struct bfa_itnim_hal_stats_s *stats)
+{
+	*stats = itnim->stats;
+}
+
+void
+bfa_itnim_clear_stats(struct bfa_itnim_s *itnim)
+{
+	bfa_os_memset(&itnim->stats, 0, sizeof(itnim->stats));
+}
+
+