Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 1437 insertions, 0 deletions

diff --git a/drivers/scsi/qla2xxx/qla_rscn.c b/drivers/scsi/qla2xxx/qla_rscn.c
new file mode 100644
index 00000000000..fb545b50fc2
--- /dev/null
+++ b/drivers/scsi/qla2xxx/qla_rscn.c
@@ -0,0 +1,1437 @@
+/*
+ *                  QLOGIC LINUX SOFTWARE
+ *
+ * QLogic ISP2x00 device driver for Linux 2.6.x
+ * Copyright (C) 2003-2004 QLogic Corporation
+ * (www.qlogic.com)
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2, or (at your option) any
+ * later version.
+ *
+ * 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 "qla_def.h"
+
+/**
+ * IO descriptor handle definitions.
+ *
+ * Signature form:
+ *
+ *	|31------28|27-------------------12|11-------0|
+ *	|   Type   |   Rolling Signature   |   Index  |
+ *	|----------|-----------------------|----------|
+ *
+ **/
+
+#define HDL_TYPE_SCSI		0
+#define HDL_TYPE_ASYNC_IOCB	0x0A
+
+#define HDL_INDEX_BITS	12
+#define HDL_ITER_BITS	16
+#define HDL_TYPE_BITS	4
+
+#define HDL_INDEX_MASK	((1UL << HDL_INDEX_BITS) - 1)
+#define HDL_ITER_MASK	((1UL << HDL_ITER_BITS) - 1)
+#define HDL_TYPE_MASK	((1UL << HDL_TYPE_BITS) - 1)
+
+#define HDL_INDEX_SHIFT	0
+#define HDL_ITER_SHIFT	(HDL_INDEX_SHIFT + HDL_INDEX_BITS)
+#define HDL_TYPE_SHIFT	(HDL_ITER_SHIFT + HDL_ITER_BITS)
+
+/* Local Prototypes. */
+static inline uint32_t qla2x00_to_handle(uint16_t, uint16_t, uint16_t);
+static inline uint16_t qla2x00_handle_to_idx(uint32_t);
+static inline uint32_t qla2x00_iodesc_to_handle(struct io_descriptor *);
+static inline struct io_descriptor *qla2x00_handle_to_iodesc(scsi_qla_host_t *,
+    uint32_t);
+
+static inline struct io_descriptor *qla2x00_alloc_iodesc(scsi_qla_host_t *);
+static inline void qla2x00_free_iodesc(struct io_descriptor *);
+static inline void qla2x00_init_io_descriptors(scsi_qla_host_t *);
+
+static void qla2x00_iodesc_timeout(unsigned long);
+static inline void qla2x00_add_iodesc_timer(struct io_descriptor *);
+static inline void qla2x00_remove_iodesc_timer(struct io_descriptor *);
+
+static inline void qla2x00_update_login_fcport(scsi_qla_host_t *,
+    struct mbx_entry *, fc_port_t *);
+
+static int qla2x00_send_abort_iocb(scsi_qla_host_t *, struct io_descriptor *,
+    uint32_t, int);
+static int qla2x00_send_abort_iocb_cb(scsi_qla_host_t *, struct io_descriptor *,
+    struct mbx_entry *);
+
+static int qla2x00_send_adisc_iocb(scsi_qla_host_t *, struct io_descriptor *,
+    int);
+static int qla2x00_send_adisc_iocb_cb(scsi_qla_host_t *, struct io_descriptor *,
+    struct mbx_entry *);
+
+static int qla2x00_send_logout_iocb(scsi_qla_host_t *, struct io_descriptor *,
+    int);
+static int qla2x00_send_logout_iocb_cb(scsi_qla_host_t *,
+    struct io_descriptor *, struct mbx_entry *);
+
+static int qla2x00_send_login_iocb(scsi_qla_host_t *, struct io_descriptor *,
+    port_id_t *, int);
+static int qla2x00_send_login_iocb_cb(scsi_qla_host_t *, struct io_descriptor *,
+    struct mbx_entry *);
+
+/** 
+ * Mailbox IOCB callback array.
+ **/
+static int (*iocb_function_cb_list[LAST_IOCB_CB])
+	(scsi_qla_host_t *, struct io_descriptor *, struct mbx_entry *) = {
+
+	qla2x00_send_abort_iocb_cb,
+	qla2x00_send_adisc_iocb_cb,
+	qla2x00_send_logout_iocb_cb,
+	qla2x00_send_login_iocb_cb,
+};
+
+
+/** 
+ * Generic IO descriptor handle routines.
+ **/
+
+/**
+ * qla2x00_to_handle() - Create a descriptor handle.
+ * @type: descriptor type
+ * @iter: descriptor rolling signature
+ * @idx: index to the descriptor array
+ *
+ * Returns a composite handle based in the @type, @iter, and @idx.
+ */
+static inline uint32_t
+qla2x00_to_handle(uint16_t type, uint16_t iter, uint16_t idx)
+{
+	return ((uint32_t)(((uint32_t)type << HDL_TYPE_SHIFT) |
+	    ((uint32_t)iter << HDL_ITER_SHIFT) |
+	    ((uint32_t)idx << HDL_INDEX_SHIFT)));
+}
+
+/**
+ * qla2x00_handle_to_idx() - Retrive the index for a given handle.
+ * @handle: descriptor handle
+ *
+ * Returns the index specified by the @handle.
+ */
+static inline uint16_t
+qla2x00_handle_to_idx(uint32_t handle)
+{
+	return ((uint16_t)(((handle) >> HDL_INDEX_SHIFT) & HDL_INDEX_MASK));
+}
+
+/**
+ * qla2x00_iodesc_to_handle() - Convert an IO descriptor to a unique handle.
+ * @iodesc: io descriptor
+ *
+ * Returns a unique handle for @iodesc.
+ */
+static inline uint32_t
+qla2x00_iodesc_to_handle(struct io_descriptor *iodesc)
+{
+	uint32_t handle;
+
+	handle = qla2x00_to_handle(HDL_TYPE_ASYNC_IOCB,
+	    ++iodesc->ha->iodesc_signature, iodesc->idx);
+	iodesc->signature = handle;
+
+	return (handle);
+}
+
+/**
+ * qla2x00_handle_to_iodesc() - Retrieve an IO descriptor given a unique handle.
+ * @ha: HA context
+ * @handle: handle to io descriptor
+ *
+ * Returns a pointer to the io descriptor, or NULL, if the io descriptor does
+ * not exist or the io descriptors signature does not @handle.
+ */
+static inline struct io_descriptor *
+qla2x00_handle_to_iodesc(scsi_qla_host_t *ha, uint32_t handle)
+{
+	uint16_t idx;
+	struct io_descriptor *iodesc;
+
+	idx = qla2x00_handle_to_idx(handle);
+	iodesc = &ha->io_descriptors[idx];
+	if (iodesc)
+		if (iodesc->signature != handle)
+			iodesc = NULL;
+
+	return (iodesc);
+}
+
+
+/** 
+ * IO descriptor allocation routines.
+ **/
+
+/**
+ * qla2x00_alloc_iodesc() - Allocate an IO descriptor from the pool.
+ * @ha: HA context
+ *
+ * Returns a pointer to the allocated io descriptor, or NULL, if none available.
+ */
+static inline struct io_descriptor *
+qla2x00_alloc_iodesc(scsi_qla_host_t *ha)
+{
+	uint16_t iter;
+	struct io_descriptor *iodesc;
+
+	iodesc = NULL;
+	for (iter = 0; iter < MAX_IO_DESCRIPTORS; iter++) {
+		if (ha->io_descriptors[iter].used)
+			continue;
+
+		iodesc = &ha->io_descriptors[iter];
+		iodesc->used = 1;
+		iodesc->idx = iter;
+		init_timer(&iodesc->timer);
+		iodesc->ha = ha;
+		iodesc->signature = qla2x00_iodesc_to_handle(iodesc);
+		break;
+	}
+
+	return (iodesc);
+}
+
+/**
+ * qla2x00_free_iodesc() - Free an IO descriptor.
+ * @iodesc: io descriptor
+ *
+ * NOTE: The io descriptors timer *must* be stopped before it can be free'd.
+ */
+static inline void
+qla2x00_free_iodesc(struct io_descriptor *iodesc)
+{
+	iodesc->used = 0;
+	iodesc->signature = 0;
+}
+
+/**
+ * qla2x00_remove_iodesc_timer() - Remove an active timer from an IO descriptor.
+ * @iodesc: io descriptor
+ */
+static inline void
+qla2x00_remove_iodesc_timer(struct io_descriptor *iodesc)
+{
+	if (iodesc->timer.function != NULL) {
+		del_timer_sync(&iodesc->timer);
+		iodesc->timer.data = (unsigned long) NULL;
+		iodesc->timer.function = NULL;
+	}
+}
+
+/**
+ * qla2x00_init_io_descriptors() - Initialize the pool of IO descriptors.
+ * @ha: HA context
+ */
+static inline void
+qla2x00_init_io_descriptors(scsi_qla_host_t *ha)
+{
+	uint16_t iter;
+
+	for (iter = 0; iter < MAX_IO_DESCRIPTORS; iter++) {
+		if (!ha->io_descriptors[iter].used)
+			continue;
+
+		qla2x00_remove_iodesc_timer(&ha->io_descriptors[iter]);
+		qla2x00_free_iodesc(&ha->io_descriptors[iter]);
+	}
+}
+
+
+/** 
+ * IO descriptor timer routines.
+ **/
+
+/**
+ * qla2x00_iodesc_timeout() - Timeout IO descriptor handler.
+ * @data: io descriptor
+ */
+static void
+qla2x00_iodesc_timeout(unsigned long data)
+{
+	struct io_descriptor *iodesc;
+
+	iodesc = (struct io_descriptor *) data;
+
+	DEBUG14(printk("scsi(%ld): IO descriptor timeout, index=%x "
+	    "signature=%08x, scheduling ISP abort.\n", iodesc->ha->host_no,
+	    iodesc->idx, iodesc->signature));
+
+	qla2x00_free_iodesc(iodesc);
+
+	qla_printk(KERN_WARNING, iodesc->ha,
+	    "IO descriptor timeout. Scheduling ISP abort.\n");
+	set_bit(ISP_ABORT_NEEDED, &iodesc->ha->dpc_flags);
+}
+
+/**
+ * qla2x00_add_iodesc_timer() - Add and start a timer for an IO descriptor.
+ * @iodesc: io descriptor
+ *
+ * NOTE:
+ * The firmware shall timeout an outstanding mailbox IOCB in 2 * R_A_TOV (in
+ * tenths of a second) after it hits the wire.  But, if there are any request
+ * resource contraints (i.e. during heavy I/O), exchanges can be held off for
+ * at most R_A_TOV.  Therefore, the driver will wait 4 * R_A_TOV before
+ * scheduling a recovery (big hammer).
+ */
+static inline void
+qla2x00_add_iodesc_timer(struct io_descriptor *iodesc)
+{
+	unsigned long timeout;
+
+	timeout = (iodesc->ha->r_a_tov * 4) / 10;
+	init_timer(&iodesc->timer);
+	iodesc->timer.data = (unsigned long) iodesc;
+	iodesc->timer.expires = jiffies + (timeout * HZ);
+	iodesc->timer.function =
+	    (void (*) (unsigned long)) qla2x00_iodesc_timeout;
+	add_timer(&iodesc->timer);
+}
+
+/** 
+ * IO descriptor support routines.
+ **/
+
+/**
+ * qla2x00_update_login_fcport() - Update fcport data after login processing.
+ * @ha: HA context
+ * @mbxstat: Mailbox command status IOCB
+ * @fcport: port to update
+ */
+static inline void
+qla2x00_update_login_fcport(scsi_qla_host_t *ha, struct mbx_entry *mbxstat,
+    fc_port_t *fcport)
+{
+	if (le16_to_cpu(mbxstat->mb1) & BIT_0) {
+		fcport->port_type = FCT_INITIATOR;
+	} else {
+		fcport->port_type = FCT_TARGET;
+		if (le16_to_cpu(mbxstat->mb1) & BIT_1) {
+			fcport->flags |= FCF_TAPE_PRESENT;
+		}
+	}
+	fcport->login_retry = 0;
+	fcport->port_login_retry_count = ha->port_down_retry_count *
+	    PORT_RETRY_TIME;
+	atomic_set(&fcport->port_down_timer, ha->port_down_retry_count *
+	    PORT_RETRY_TIME);
+	fcport->flags |= FCF_FABRIC_DEVICE;
+	fcport->flags &= ~FCF_FAILOVER_NEEDED;
+	fcport->iodesc_idx_sent = IODESC_INVALID_INDEX;
+	atomic_set(&fcport->state, FCS_ONLINE);
+}
+
+
+/** 
+ * Mailbox IOCB commands.
+ **/
+
+/**
+ * qla2x00_get_mbx_iocb_entry() - Retrieve an IOCB from the request queue.
+ * @ha: HA context
+ * @handle: handle to io descriptor
+ *
+ * Returns a pointer to the reqest entry, or NULL, if none were available.
+ */
+static inline struct mbx_entry *
+qla2x00_get_mbx_iocb_entry(scsi_qla_host_t *ha, uint32_t handle)
+{
+	uint16_t cnt;
+	device_reg_t __iomem *reg = ha->iobase;
+	struct mbx_entry *mbxentry;
+
+	mbxentry = NULL;
+
+	if (ha->req_q_cnt < 3) {
+		cnt = qla2x00_debounce_register(ISP_REQ_Q_OUT(ha, reg));
+		if  (ha->req_ring_index < cnt)
+			ha->req_q_cnt = cnt - ha->req_ring_index;
+		else
+			ha->req_q_cnt = ha->request_q_length -
+			    (ha->req_ring_index - cnt);
+	}
+	if (ha->req_q_cnt >= 3) {
+		mbxentry = (struct mbx_entry *)ha->request_ring_ptr;
+
+		memset(mbxentry, 0, sizeof(struct mbx_entry));
+		mbxentry->entry_type = MBX_IOCB_TYPE;
+		mbxentry->entry_count = 1;
+		mbxentry->sys_define1 = SOURCE_ASYNC_IOCB;
+		mbxentry->handle = handle;
+	}
+	return (mbxentry);
+}
+
+/**
+ * qla2x00_send_abort_iocb() - Issue an abort IOCB to the firmware.
+ * @ha: HA context
+ * @iodesc: io descriptor
+ * @handle_to_abort: firmware handle to abort
+ * @ha_locked: is function called with the hardware lock
+ *
+ * Returns QLA_SUCCESS if the IOCB was issued.
+ */
+static int
+qla2x00_send_abort_iocb(scsi_qla_host_t *ha, struct io_descriptor *iodesc, 
+    uint32_t handle_to_abort, int ha_locked)
+{
+	unsigned long flags = 0;
+	struct mbx_entry *mbxentry;
+
+	/* Send marker if required. */
+	if (qla2x00_issue_marker(ha, ha_locked) != QLA_SUCCESS)
+		return (QLA_FUNCTION_FAILED);
+
+	if (!ha_locked)
+		spin_lock_irqsave(&ha->hardware_lock, flags);
+
+	/* Build abort mailbox IOCB. */
+	mbxentry = qla2x00_get_mbx_iocb_entry(ha, iodesc->signature);
+	if (mbxentry == NULL) {
+		if (!ha_locked)
+			spin_unlock_irqrestore(&ha->hardware_lock, flags);
+
+		return (QLA_FUNCTION_FAILED);
+	}
+	mbxentry->mb0 = __constant_cpu_to_le16(MBC_ABORT_COMMAND);
+	mbxentry->mb1 = mbxentry->loop_id.extended =
+	    cpu_to_le16(iodesc->remote_fcport->loop_id);
+	mbxentry->mb2 = LSW(handle_to_abort);
+	mbxentry->mb3 = MSW(handle_to_abort);
+	wmb();
+
+	qla2x00_add_iodesc_timer(iodesc);
+
+	/* Issue command to ISP. */
+	qla2x00_isp_cmd(ha);
+
+	if (!ha_locked)
+		spin_unlock_irqrestore(&ha->hardware_lock, flags);
+
+	DEBUG14(printk("scsi(%ld): Sending Abort IOCB (%08x) to [%x], aborting "
+	    "%08x.\n", ha->host_no, iodesc->signature,
+	    iodesc->remote_fcport->loop_id, handle_to_abort));
+
+	return (QLA_SUCCESS);
+}
+
+/**
+ * qla2x00_send_abort_iocb_cb() - Abort IOCB callback.
+ * @ha: HA context
+ * @iodesc: io descriptor
+ * @mbxstat: mailbox status IOCB
+ *
+ * Returns QLA_SUCCESS if @iodesc can be freed by the caller, else, @iodesc
+ * will be used for a retry.
+ */
+static int
+qla2x00_send_abort_iocb_cb(scsi_qla_host_t *ha, struct io_descriptor *iodesc,
+    struct mbx_entry *mbxstat)
+{
+	DEBUG14(printk("scsi(%ld): Abort IOCB -- sent to [%x/%02x%02x%02x], "
+	    "status=%x mb0=%x.\n", ha->host_no, iodesc->remote_fcport->loop_id,
+	    iodesc->d_id.b.domain, iodesc->d_id.b.area, iodesc->d_id.b.al_pa,
+	    le16_to_cpu(mbxstat->status), le16_to_cpu(mbxstat->mb0)));
+
+	return (QLA_SUCCESS);
+}
+
+
+/**
+ * qla2x00_send_adisc_iocb() - Issue a Get Port Database IOCB to the firmware.
+ * @ha: HA context
+ * @iodesc: io descriptor
+ * @ha_locked: is function called with the hardware lock
+ *
+ * Returns QLA_SUCCESS if the IOCB was issued.
+ */
+static int
+qla2x00_send_adisc_iocb(scsi_qla_host_t *ha, struct io_descriptor *iodesc,
+    int ha_locked)
+{
+	unsigned long flags = 0;
+	struct mbx_entry *mbxentry;
+
+	/* Send marker if required. */
+	if (qla2x00_issue_marker(ha, ha_locked) != QLA_SUCCESS)
+		return (QLA_FUNCTION_FAILED);
+
+	if (!ha_locked)
+		spin_lock_irqsave(&ha->hardware_lock, flags);
+
+	/* Build Get Port Database IOCB. */
+	mbxentry = qla2x00_get_mbx_iocb_entry(ha, iodesc->signature);
+	if (mbxentry == NULL) {
+		if (!ha_locked)
+			spin_unlock_irqrestore(&ha->hardware_lock, flags);
+
+		return (QLA_FUNCTION_FAILED);
+	}
+	mbxentry->mb0 = __constant_cpu_to_le16(MBC_GET_PORT_DATABASE);
+	mbxentry->mb1 = mbxentry->loop_id.extended =
+	    cpu_to_le16(iodesc->remote_fcport->loop_id);
+	mbxentry->mb2 = cpu_to_le16(MSW(LSD(ha->iodesc_pd_dma)));
+	mbxentry->mb3 = cpu_to_le16(LSW(LSD(ha->iodesc_pd_dma)));
+	mbxentry->mb6 = cpu_to_le16(MSW(MSD(ha->iodesc_pd_dma)));
+	mbxentry->mb7 = cpu_to_le16(LSW(MSD(ha->iodesc_pd_dma)));
+	mbxentry->mb10 = __constant_cpu_to_le16(BIT_0);
+	wmb();
+
+	qla2x00_add_iodesc_timer(iodesc);
+
+	/* Issue command to ISP. */
+	qla2x00_isp_cmd(ha);
+
+	if (!ha_locked)
+		spin_unlock_irqrestore(&ha->hardware_lock, flags);
+
+	DEBUG14(printk("scsi(%ld): Sending Adisc IOCB (%08x) to [%x].\n",
+	    ha->host_no, iodesc->signature, iodesc->remote_fcport->loop_id));
+
+	return (QLA_SUCCESS);
+}
+
+/**
+ * qla2x00_send_adisc_iocb_cb() - Get Port Database IOCB callback.
+ * @ha: HA context
+ * @iodesc: io descriptor
+ * @mbxstat: mailbox status IOCB
+ *
+ * Returns QLA_SUCCESS if @iodesc can be freed by the caller, else, @iodesc
+ * will be used for a retry.
+ */
+static int
+qla2x00_send_adisc_iocb_cb(scsi_qla_host_t *ha, struct io_descriptor *iodesc,
+    struct mbx_entry *mbxstat)
+{
+	fc_port_t *remote_fcport;
+
+	remote_fcport = iodesc->remote_fcport;
+
+	/* Ensure the port IDs are consistent. */
+	if (remote_fcport->d_id.b24 != iodesc->d_id.b24) {
+		DEBUG14(printk("scsi(%ld): Adisc IOCB -- ignoring, remote port "
+		    "id changed from [%02x%02x%02x] to [%02x%02x%02x].\n",
+		    ha->host_no, remote_fcport->d_id.b.domain,
+		    remote_fcport->d_id.b.area, remote_fcport->d_id.b.al_pa,
+		    iodesc->d_id.b.domain, iodesc->d_id.b.area,
+		    iodesc->d_id.b.al_pa));
+
+		return (QLA_SUCCESS);
+	}
+
+	/* Only process the last command. */
+	if (remote_fcport->iodesc_idx_sent != iodesc->idx) {
+		DEBUG14(printk("scsi(%ld): Adisc IOCB -- ignoring, sent to "
+		    "[%02x%02x%02x], expected %x, received %x.\n", ha->host_no,
+		    iodesc->d_id.b.domain, iodesc->d_id.b.area,
+		    iodesc->d_id.b.al_pa, remote_fcport->iodesc_idx_sent,
+		    iodesc->idx));
+
+		return (QLA_SUCCESS);
+	}
+
+	if (le16_to_cpu(mbxstat->status) == CS_COMPLETE) {
+		DEBUG14(printk("scsi(%ld): Adisc IOCB -- marking "
+		    "[%x/%02x%02x%02x] online.\n", ha->host_no,
+		    remote_fcport->loop_id, remote_fcport->d_id.b.domain,
+		    remote_fcport->d_id.b.area, remote_fcport->d_id.b.al_pa));
+
+		atomic_set(&remote_fcport->state, FCS_ONLINE);
+	} else {
+		DEBUG14(printk("scsi(%ld): Adisc IOCB -- marking "
+		    "[%x/%02x%02x%02x] lost, status=%x mb0=%x.\n", ha->host_no,
+		    remote_fcport->loop_id, remote_fcport->d_id.b.domain,
+		    remote_fcport->d_id.b.area, remote_fcport->d_id.b.al_pa,
+		    le16_to_cpu(mbxstat->status), le16_to_cpu(mbxstat->mb0)));
+
+		if (atomic_read(&remote_fcport->state) != FCS_DEVICE_DEAD)
+			atomic_set(&remote_fcport->state, FCS_DEVICE_LOST);
+	}
+	remote_fcport->iodesc_idx_sent = IODESC_INVALID_INDEX;
+
+	return (QLA_SUCCESS);
+}
+
+
+/**
+ * qla2x00_send_logout_iocb() - Issue a fabric port logout IOCB to the firmware.
+ * @ha: HA context
+ * @iodesc: io descriptor
+ * @ha_locked: is function called with the hardware lock
+ *
+ * Returns QLA_SUCCESS if the IOCB was issued.
+ */
+static int
+qla2x00_send_logout_iocb(scsi_qla_host_t *ha, struct io_descriptor *iodesc,
+    int ha_locked)
+{
+	unsigned long flags = 0;
+	struct mbx_entry *mbxentry;
+
+	/* Send marker if required. */
+	if (qla2x00_issue_marker(ha, ha_locked) != QLA_SUCCESS)
+		return (QLA_FUNCTION_FAILED);
+
+	if (!ha_locked)
+		spin_lock_irqsave(&ha->hardware_lock, flags);
+
+	/* Build fabric port logout mailbox IOCB. */
+	mbxentry = qla2x00_get_mbx_iocb_entry(ha, iodesc->signature);
+	if (mbxentry == NULL) {
+		if (!ha_locked)
+			spin_unlock_irqrestore(&ha->hardware_lock, flags);
+
+		return (QLA_FUNCTION_FAILED);
+	}
+	mbxentry->mb0 = __constant_cpu_to_le16(MBC_LOGOUT_FABRIC_PORT);
+	mbxentry->mb1 = mbxentry->loop_id.extended =
+	    cpu_to_le16(iodesc->remote_fcport->loop_id);
+	wmb();
+
+	qla2x00_add_iodesc_timer(iodesc);
+
+	/* Issue command to ISP. */
+	qla2x00_isp_cmd(ha);
+
+	if (!ha_locked)
+		spin_unlock_irqrestore(&ha->hardware_lock, flags);
+
+	DEBUG14(printk("scsi(%ld): Sending Logout IOCB (%08x) to [%x].\n",
+	    ha->host_no, iodesc->signature, iodesc->remote_fcport->loop_id));
+
+	return (QLA_SUCCESS);
+}
+
+/**
+ * qla2x00_send_logout_iocb_cb() - Fabric port logout IOCB callback.
+ * @ha: HA context
+ * @iodesc: io descriptor
+ * @mbxstat: mailbox status IOCB
+ *
+ * Returns QLA_SUCCESS if @iodesc can be freed by the caller, else, @iodesc
+ * will be used for a retry.
+ */
+static int
+qla2x00_send_logout_iocb_cb(scsi_qla_host_t *ha, struct io_descriptor *iodesc,
+    struct mbx_entry *mbxstat)
+{
+	DEBUG14(printk("scsi(%ld): Logout IOCB -- sent to [%x/%02x%02x%02x], "
+	    "status=%x mb0=%x mb1=%x.\n", ha->host_no,
+	    iodesc->remote_fcport->loop_id,
+	    iodesc->remote_fcport->d_id.b.domain,
+	    iodesc->remote_fcport->d_id.b.area,
+	    iodesc->remote_fcport->d_id.b.al_pa, le16_to_cpu(mbxstat->status),
+	    le16_to_cpu(mbxstat->mb0), le16_to_cpu(mbxstat->mb1)));
+
+	return (QLA_SUCCESS);
+}
+
+
+/**
+ * qla2x00_send_login_iocb() - Issue a fabric port login IOCB to the firmware.
+ * @ha: HA context
+ * @iodesc: io descriptor
+ * @d_id: port id for device
+ * @ha_locked: is function called with the hardware lock
+ *
+ * Returns QLA_SUCCESS if the IOCB was issued.
+ */
+static int
+qla2x00_send_login_iocb(scsi_qla_host_t *ha, struct io_descriptor *iodesc,
+    port_id_t *d_id, int ha_locked)
+{
+	unsigned long flags = 0;
+	struct mbx_entry *mbxentry;
+
+	/* Send marker if required. */
+	if (qla2x00_issue_marker(ha, ha_locked) != QLA_SUCCESS)
+		return (QLA_FUNCTION_FAILED);
+
+	if (!ha_locked)
+		spin_lock_irqsave(&ha->hardware_lock, flags);
+
+	/* Build fabric port login mailbox IOCB. */
+	mbxentry = qla2x00_get_mbx_iocb_entry(ha, iodesc->signature);
+	if (mbxentry == NULL) {
+		if (!ha_locked)
+			spin_unlock_irqrestore(&ha->hardware_lock, flags);
+
+		return (QLA_FUNCTION_FAILED);
+	}
+	mbxentry->mb0 = __constant_cpu_to_le16(MBC_LOGIN_FABRIC_PORT);
+	mbxentry->mb1 = mbxentry->loop_id.extended =
+	    cpu_to_le16(iodesc->remote_fcport->loop_id);
+	mbxentry->mb2 = cpu_to_le16(d_id->b.domain);
+	mbxentry->mb3 = cpu_to_le16(d_id->b.area << 8 | d_id->b.al_pa);
+	mbxentry->mb10 = __constant_cpu_to_le16(BIT_0);
+	wmb();
+
+	qla2x00_add_iodesc_timer(iodesc);
+
+	/* Issue command to ISP. */
+	qla2x00_isp_cmd(ha);
+
+	if (!ha_locked)
+		spin_unlock_irqrestore(&ha->hardware_lock, flags);
+
+	DEBUG14(printk("scsi(%ld): Sending Login IOCB (%08x) to "
+	    "[%x/%02x%02x%02x].\n", ha->host_no, iodesc->signature,
+	    iodesc->remote_fcport->loop_id, d_id->b.domain, d_id->b.area,
+	    d_id->b.al_pa));
+
+	return (QLA_SUCCESS);
+}
+
+/**
+ * qla2x00_send_login_iocb_cb() - Fabric port logout IOCB callback.
+ * @ha: HA context
+ * @iodesc: io descriptor
+ * @mbxstat: mailbox status IOCB
+ *
+ * Returns QLA_SUCCESS if @iodesc can be freed by the caller, else, @iodesc
+ * will be used for a retry.
+ */
+static int
+qla2x00_send_login_iocb_cb(scsi_qla_host_t *ha, struct io_descriptor *iodesc,
+    struct mbx_entry *mbxstat)
+{
+	int rval;
+	fc_port_t *fcport, *remote_fcport, *exist_fcport;
+	struct io_descriptor *abort_iodesc, *login_iodesc;
+	uint16_t status, mb[8];
+	uint16_t reuse;
+	uint16_t remote_loopid;
+	port_id_t remote_did, inuse_did;
+
+	remote_fcport = iodesc->remote_fcport;
+
+	/* Only process the last command. */
+	if (remote_fcport->iodesc_idx_sent != iodesc->idx) {
+		DEBUG14(printk("scsi(%ld): Login IOCB -- ignoring, sent to "
+		    "[%02x%02x%02x], expected %x, received %x.\n", 
+		    ha->host_no, iodesc->d_id.b.domain, iodesc->d_id.b.area,
+		    iodesc->d_id.b.al_pa, remote_fcport->iodesc_idx_sent,
+		    iodesc->idx));
+
+		/* Free RSCN fcport resources. */
+		if (remote_fcport->port_type == FCT_RSCN) {
+			DEBUG14(printk("scsi(%ld): Login IOCB -- Freeing RSCN "
+			    "fcport %p [%x/%02x%02x%02x] given ignored Login "
+			    "IOCB.\n", ha->host_no, remote_fcport,
+			    remote_fcport->loop_id,
+			    remote_fcport->d_id.b.domain,
+			    remote_fcport->d_id.b.area,
+			    remote_fcport->d_id.b.al_pa));
+
+			list_del(&remote_fcport->list);
+			kfree(remote_fcport);
+		}
+		return (QLA_SUCCESS);
+	}
+
+	status = le16_to_cpu(mbxstat->status);
+	mb[0] = le16_to_cpu(mbxstat->mb0);
+	mb[1] = le16_to_cpu(mbxstat->mb1);
+	mb[2] = le16_to_cpu(mbxstat->mb2);
+	mb[6] = le16_to_cpu(mbxstat->mb6);
+	mb[7] = le16_to_cpu(mbxstat->mb7);
+
+	/* Good status? */
+	if ((status == CS_COMPLETE || status == CS_COMPLETE_CHKCOND) &&
+	    mb[0] == MBS_COMMAND_COMPLETE) {
+
+		DEBUG14(printk("scsi(%ld): Login IOCB -- status=%x mb1=%x pn="
+		    "%02x%02x%02x%02x%02x%02x%02x%02x.\n", ha->host_no, status,
+		    mb[1], mbxstat->port_name[0], mbxstat->port_name[1], 
+		    mbxstat->port_name[2], mbxstat->port_name[3], 
+		    mbxstat->port_name[4], mbxstat->port_name[5], 
+		    mbxstat->port_name[6], mbxstat->port_name[7]));
+
+		memcpy(remote_fcport->node_name, mbxstat->node_name, WWN_SIZE);
+		memcpy(remote_fcport->port_name, mbxstat->port_name, WWN_SIZE);
+
+		/* Is the device already in our fcports list? */
+		if (remote_fcport->port_type != FCT_RSCN) {
+			DEBUG14(printk("scsi(%ld): Login IOCB -- marking "
+			    "[%x/%02x%02x%02x] online.\n", ha->host_no,
+			    remote_fcport->loop_id,
+			    remote_fcport->d_id.b.domain,
+			    remote_fcport->d_id.b.area,
+			    remote_fcport->d_id.b.al_pa));
+
+			qla2x00_update_login_fcport(ha, mbxstat, remote_fcport);
+
+			return (QLA_SUCCESS);
+		}
+
+		/* Does the RSCN portname already exist in our fcports list? */
+		exist_fcport = NULL;
+		list_for_each_entry(fcport, &ha->fcports, list) {
+			if (memcmp(remote_fcport->port_name, fcport->port_name,
+			    WWN_SIZE) == 0) {
+				exist_fcport = fcport;
+				break;
+			}
+		}
+		if (exist_fcport != NULL) {
+			DEBUG14(printk("scsi(%ld): Login IOCB -- found RSCN "
+			    "fcport in fcports list [%p].\n", ha->host_no,
+			    exist_fcport));
+
+			/* Abort any ADISC that could have been sent. */
+			if (exist_fcport->iodesc_idx_sent != iodesc->idx &&
+			    exist_fcport->iodesc_idx_sent <
+			    MAX_IO_DESCRIPTORS &&
+			    ha->io_descriptors[exist_fcport->iodesc_idx_sent].
+			    cb_idx == ADISC_PORT_IOCB_CB) {
+
+				abort_iodesc = qla2x00_alloc_iodesc(ha);
+				if (abort_iodesc) {
+					DEBUG14(printk("scsi(%ld): Login IOCB "
+					    "-- issuing abort to outstanding "
+					    "Adisc [%x/%02x%02x%02x].\n",
+					    ha->host_no, remote_fcport->loop_id,
+					    exist_fcport->d_id.b.domain,
+					    exist_fcport->d_id.b.area,
+					    exist_fcport->d_id.b.al_pa));
+
+					abort_iodesc->cb_idx = ABORT_IOCB_CB;
+					abort_iodesc->d_id.b24 =
+					    exist_fcport->d_id.b24;
+					abort_iodesc->remote_fcport =
+					    exist_fcport;
+					exist_fcport->iodesc_idx_sent =
+					    abort_iodesc->idx;
+					qla2x00_send_abort_iocb(ha,
+					    abort_iodesc, ha->io_descriptors[
+					     exist_fcport->iodesc_idx_sent].
+					      signature, 1);
+				} else {
+					DEBUG14(printk("scsi(%ld): Login IOCB "
+					    "-- unable to abort outstanding "
+					    "Adisc [%x/%02x%02x%02x].\n",
+					    ha->host_no, remote_fcport->loop_id,
+					    exist_fcport->d_id.b.domain,
+					    exist_fcport->d_id.b.area,
+					    exist_fcport->d_id.b.al_pa));
+				}
+			}
+
+			/*
+			 * If the existing fcport is waiting to send an ADISC
+			 * or LOGIN, then reuse remote fcport (RSCN) to
+			 * continue waiting.
+			 */
+			reuse = 0;
+			remote_loopid = remote_fcport->loop_id;
+			remote_did.b24 = remote_fcport->d_id.b24;
+			if (exist_fcport->iodesc_idx_sent ==
+			    IODESC_ADISC_NEEDED ||
+			    exist_fcport->iodesc_idx_sent ==
+			    IODESC_LOGIN_NEEDED) {
+				DEBUG14(printk("scsi(%ld): Login IOCB -- "
+				    "existing fcport [%x/%02x%02x%02x] "
+				    "waiting for IO descriptor, reuse RSCN "
+				    "fcport.\n", ha->host_no,
+				    exist_fcport->loop_id,
+				    exist_fcport->d_id.b.domain,
+				    exist_fcport->d_id.b.area,
+				    exist_fcport->d_id.b.al_pa));
+
+				reuse++;
+				remote_fcport->iodesc_idx_sent =
+				    exist_fcport->iodesc_idx_sent;
+				exist_fcport->iodesc_idx_sent =
+				    IODESC_INVALID_INDEX;
+				remote_fcport->loop_id = exist_fcport->loop_id;
+				remote_fcport->d_id.b24 =
+				    exist_fcport->d_id.b24;
+			}
+
+			/* Logout the old loopid. */
+			if (!reuse &&
+			    exist_fcport->loop_id != remote_fcport->loop_id &&
+			    exist_fcport->loop_id != FC_NO_LOOP_ID) {
+				login_iodesc = qla2x00_alloc_iodesc(ha);
+				if (login_iodesc) {
+					DEBUG14(printk("scsi(%ld): Login IOCB "
+					    "-- issuing logout to free old "
+					    "loop id [%x/%02x%02x%02x].\n",
+					    ha->host_no, exist_fcport->loop_id,
+					    exist_fcport->d_id.b.domain,
+					    exist_fcport->d_id.b.area,
+					    exist_fcport->d_id.b.al_pa));
+
+					login_iodesc->cb_idx =
+					    LOGOUT_PORT_IOCB_CB;
+					login_iodesc->d_id.b24 =
+					    exist_fcport->d_id.b24;
+					login_iodesc->remote_fcport =
+					    exist_fcport;
+					exist_fcport->iodesc_idx_sent =
+					    login_iodesc->idx;
+					qla2x00_send_logout_iocb(ha,
+					    login_iodesc, 1);
+				} else {
+					/* Ran out of IO descriptiors. */
+					DEBUG14(printk("scsi(%ld): Login IOCB "
+					    "-- unable to logout to free old "
+					    "loop id [%x/%02x%02x%02x].\n",
+					    ha->host_no, exist_fcport->loop_id,
+					    exist_fcport->d_id.b.domain,
+					    exist_fcport->d_id.b.area,
+					    exist_fcport->d_id.b.al_pa));
+
+					exist_fcport->iodesc_idx_sent =
+					    IODESC_INVALID_INDEX;
+				}
+
+			}
+
+			/* Update existing fcport with remote fcport info. */
+			DEBUG14(printk("scsi(%ld): Login IOCB -- marking "
+			    "existing fcport [%x/%02x%02x%02x] online.\n",
+			    ha->host_no, remote_loopid, remote_did.b.domain,
+			    remote_did.b.area, remote_did.b.al_pa));
+
+			memcpy(exist_fcport->node_name,
+			    remote_fcport->node_name, WWN_SIZE);
+			exist_fcport->loop_id = remote_loopid;
+			exist_fcport->d_id.b24 = remote_did.b24;
+			qla2x00_update_login_fcport(ha, mbxstat, exist_fcport);
+
+			/* Finally, free the remote (RSCN) fcport. */
+			if (!reuse) {
+				DEBUG14(printk("scsi(%ld): Login IOCB -- "
+				    "Freeing RSCN fcport %p "
+				    "[%x/%02x%02x%02x].\n", ha->host_no,
+				    remote_fcport, remote_fcport->loop_id,
+				    remote_fcport->d_id.b.domain,
+				    remote_fcport->d_id.b.area,
+				    remote_fcport->d_id.b.al_pa));
+
+				list_del(&remote_fcport->list);
+				kfree(remote_fcport);
+			}
+
+			return (QLA_SUCCESS);
+		}
+
+		/*
+		 * A new device has been added, move the RSCN fcport to our
+		 * fcports list.
+		 */
+		DEBUG14(printk("scsi(%ld): Login IOCB -- adding RSCN fcport "
+		    "[%x/%02x%02x%02x] to fcports list.\n", ha->host_no,
+		    remote_fcport->loop_id, remote_fcport->d_id.b.domain,
+		    remote_fcport->d_id.b.area, remote_fcport->d_id.b.al_pa));
+
+		list_del(&remote_fcport->list);
+		remote_fcport->flags = (FCF_RLC_SUPPORT | FCF_RESCAN_NEEDED);
+		qla2x00_update_login_fcport(ha, mbxstat, remote_fcport);
+		list_add_tail(&remote_fcport->list, &ha->fcports);
+		set_bit(FCPORT_RESCAN_NEEDED, &ha->dpc_flags);
+	} else {
+		/* Handle login failure. */
+		if (remote_fcport->login_retry != 0) {
+			if (mb[0] == MBS_LOOP_ID_USED) {
+				inuse_did.b.domain = LSB(mb[1]);
+				inuse_did.b.area = MSB(mb[2]);
+				inuse_did.b.al_pa = LSB(mb[2]);
+
+				DEBUG14(printk("scsi(%ld): Login IOCB -- loop "
+				    "id [%x] used by port id [%02x%02x%02x].\n",
+				    ha->host_no, remote_fcport->loop_id,
+				    inuse_did.b.domain, inuse_did.b.area,
+				    inuse_did.b.al_pa));
+
+				if (remote_fcport->d_id.b24 ==
+				    INVALID_PORT_ID) {
+					/*
+					 * Invalid port id means we are trying
+					 * to login to a remote port with just
+					 * a loop id without knowing about the
+					 * port id.  Copy the port id and try
+					 * again.
+					 */
+					remote_fcport->d_id.b24 = inuse_did.b24;
+					iodesc->d_id.b24 = inuse_did.b24;
+				} else {
+					remote_fcport->loop_id++;
+					rval = qla2x00_find_new_loop_id(ha,
+					    remote_fcport);
+					if (rval == QLA_FUNCTION_FAILED) {
+						/* No more loop ids. */
+						return (QLA_SUCCESS);
+					}
+				}
+			} else if (mb[0] == MBS_PORT_ID_USED) {
+				/*
+				 * Device has another loop ID.  The firmware
+				 * group recommends the driver perform an
+				 * implicit login with the specified ID.
+				 */
+				DEBUG14(printk("scsi(%ld): Login IOCB -- port "
+				    "id [%02x%02x%02x] already assigned to "
+				    "loop id [%x].\n", ha->host_no,
+				    iodesc->d_id.b.domain, iodesc->d_id.b.area,
+				    iodesc->d_id.b.al_pa, mb[1]));
+
+				remote_fcport->loop_id = mb[1];
+
+			} else {
+				/* Unable to perform login, try again. */
+				DEBUG14(printk("scsi(%ld): Login IOCB -- "
+				    "failed login [%x/%02x%02x%02x], status=%x "
+				    "mb0=%x mb1=%x mb2=%x mb6=%x mb7=%x.\n",
+				    ha->host_no, remote_fcport->loop_id,
+				    iodesc->d_id.b.domain, iodesc->d_id.b.area,
+				    iodesc->d_id.b.al_pa, status, mb[0], mb[1],
+				    mb[2], mb[6], mb[7]));
+			}
+
+			/* Reissue Login with the same IO descriptor. */
+			iodesc->signature =
+			    qla2x00_iodesc_to_handle(iodesc);
+			iodesc->cb_idx = LOGIN_PORT_IOCB_CB;
+			iodesc->d_id.b24 = remote_fcport->d_id.b24;
+			remote_fcport->iodesc_idx_sent = iodesc->idx;
+			remote_fcport->login_retry--;
+
+			DEBUG14(printk("scsi(%ld): Login IOCB -- retrying "
+			    "login to [%x/%02x%02x%02x] (%d).\n", ha->host_no,
+			    remote_fcport->loop_id,
+			    remote_fcport->d_id.b.domain,
+			    remote_fcport->d_id.b.area,
+			    remote_fcport->d_id.b.al_pa,
+			    remote_fcport->login_retry));
+
+			qla2x00_send_login_iocb(ha, iodesc,
+			    &remote_fcport->d_id, 1);
+
+			return (QLA_FUNCTION_FAILED);
+		} else {
+			/* No more logins, mark device dead. */
+			DEBUG14(printk("scsi(%ld): Login IOCB -- failed "
+			    "login [%x/%02x%02x%02x] after retries, status=%x "
+			    "mb0=%x mb1=%x mb2=%x mb6=%x mb7=%x.\n",
+			    ha->host_no, remote_fcport->loop_id,
+			    iodesc->d_id.b.domain, iodesc->d_id.b.area,
+			    iodesc->d_id.b.al_pa, status, mb[0], mb[1],
+			    mb[2], mb[6], mb[7]));
+
+			atomic_set(&remote_fcport->state, FCS_DEVICE_DEAD);
+			if (remote_fcport->port_type == FCT_RSCN) {
+				DEBUG14(printk("scsi(%ld): Login IOCB -- "
+				    "Freeing dead RSCN fcport %p "
+				    "[%x/%02x%02x%02x].\n", ha->host_no,
+				    remote_fcport, remote_fcport->loop_id,
+				    remote_fcport->d_id.b.domain,
+				    remote_fcport->d_id.b.area,
+				    remote_fcport->d_id.b.al_pa));
+
+				list_del(&remote_fcport->list);
+				kfree(remote_fcport);
+			}
+		}
+	}
+
+	return (QLA_SUCCESS);
+}
+
+
+/** 
+ * IO descriptor processing routines.
+ **/
+
+/**
+ * qla2x00_alloc_rscn_fcport() - Allocate an RSCN type fcport.
+ * @ha: HA context
+ * @flags: allocation flags
+ *
+ * Returns a pointer to the allocated RSCN fcport, or NULL, if none available.
+ */
+fc_port_t *
+qla2x00_alloc_rscn_fcport(scsi_qla_host_t *ha, int flags)
+{
+	fc_port_t *fcport;
+
+	fcport = qla2x00_alloc_fcport(ha, flags);
+	if (fcport == NULL)
+		return (fcport);
+
+	/* Setup RSCN fcport structure. */
+	fcport->port_type = FCT_RSCN;
+
+	return (fcport);
+}
+
+/**
+ * qla2x00_handle_port_rscn() - Handle port RSCN.
+ * @ha: HA context
+ * @rscn_entry: RSCN entry
+ * @fcport: fcport entry to updated
+ *
+ * Returns QLA_SUCCESS if the port RSCN was handled.
+ */
+int
+qla2x00_handle_port_rscn(scsi_qla_host_t *ha, uint32_t rscn_entry,
+    fc_port_t *known_fcport, int ha_locked)
+{
+	int	rval;
+	port_id_t rscn_pid;
+	fc_port_t *fcport, *remote_fcport, *rscn_fcport;
+	struct io_descriptor *iodesc;
+
+	remote_fcport = NULL;
+	rscn_fcport = NULL;
+
+	/* Prepare port id based on incoming entries. */
+	if (known_fcport) {
+		rscn_pid.b24 = known_fcport->d_id.b24;
+		remote_fcport = known_fcport;
+
+		DEBUG14(printk("scsi(%ld): Handle RSCN -- process RSCN for "
+		    "fcport [%02x%02x%02x].\n", ha->host_no,
+		    remote_fcport->d_id.b.domain, remote_fcport->d_id.b.area,
+		    remote_fcport->d_id.b.al_pa));
+	} else {
+		rscn_pid.b.domain = LSB(MSW(rscn_entry));
+		rscn_pid.b.area = MSB(LSW(rscn_entry));
+		rscn_pid.b.al_pa = LSB(LSW(rscn_entry));
+
+		DEBUG14(printk("scsi(%ld): Handle RSCN -- process RSCN for "
+		    "port id [%02x%02x%02x].\n", ha->host_no,
+		    rscn_pid.b.domain, rscn_pid.b.area, rscn_pid.b.al_pa));
+
+		/*
+		 * Search fcport lists for a known entry at the specified port
+		 * ID.
+		 */
+		list_for_each_entry(fcport, &ha->fcports, list) {
+		    if (rscn_pid.b24 == fcport->d_id.b24) {
+			    remote_fcport = fcport;
+			    break;
+		    }
+		}
+		list_for_each_entry(fcport, &ha->rscn_fcports, list) {
+		    if (rscn_pid.b24 == fcport->d_id.b24) {
+			    rscn_fcport = fcport;
+			    break;
+		    }
+		}
+		if (remote_fcport == NULL)
+		    remote_fcport = rscn_fcport;
+	}
+
+	/* 
+	 * If the port is already in our fcport list and online, send an ADISC
+	 * to see if it's still alive.  Issue login if a new fcport or the known
+	 * fcport is currently offline.
+	 */
+	if (remote_fcport) {
+		/*
+		 * No need to send request if the remote fcport is currently
+		 * waiting for an available io descriptor.
+		 */
+		if (known_fcport == NULL &&
+		    (remote_fcport->iodesc_idx_sent == IODESC_ADISC_NEEDED ||
+		    remote_fcport->iodesc_idx_sent == IODESC_LOGIN_NEEDED)) {
+			/*
+			 * If previous waiting io descriptor is an ADISC, then
+			 * the new RSCN may come from a new remote fcport being
+			 * plugged into the same location.
+			 */
+			if (remote_fcport->port_type == FCT_RSCN) {
+			    remote_fcport->iodesc_idx_sent =
+				IODESC_LOGIN_NEEDED;
+			} else if (remote_fcport->iodesc_idx_sent ==
+			    IODESC_ADISC_NEEDED) {
+				fc_port_t *new_fcport;
+
+				remote_fcport->iodesc_idx_sent =
+				    IODESC_INVALID_INDEX;
+
+				/* Create new fcport for later login. */
+				new_fcport = qla2x00_alloc_rscn_fcport(ha,
+				    ha_locked ? GFP_ATOMIC: GFP_KERNEL);
+				if (new_fcport) {
+					DEBUG14(printk("scsi(%ld): Handle RSCN "
+					    "-- creating RSCN fcport %p for "
+					    "future login.\n", ha->host_no,
+					    new_fcport));
+
+					new_fcport->d_id.b24 =
+					    remote_fcport->d_id.b24;
+					new_fcport->iodesc_idx_sent =
+					    IODESC_LOGIN_NEEDED;
+
+					list_add_tail(&new_fcport->list,
+					    &ha->rscn_fcports);
+					set_bit(IODESC_PROCESS_NEEDED,
+					    &ha->dpc_flags);
+				} else {
+					DEBUG14(printk("scsi(%ld): Handle RSCN "
+					    "-- unable to allocate RSCN fcport "
+					    "for future login.\n",
+					    ha->host_no));
+				}
+			}
+			return (QLA_SUCCESS);
+		}
+		
+		/* Send ADISC if the fcport is online */
+		if (atomic_read(&remote_fcport->state) == FCS_ONLINE ||
+		    remote_fcport->iodesc_idx_sent == IODESC_ADISC_NEEDED) {
+
+			atomic_set(&remote_fcport->state, FCS_DEVICE_LOST);
+
+			iodesc = qla2x00_alloc_iodesc(ha);
+			if (iodesc == NULL) {
+				/* Mark fcport for later adisc processing */
+				DEBUG14(printk("scsi(%ld): Handle RSCN -- not "
+				    "enough IO descriptors for Adisc, flag "
+				    "for later processing.\n", ha->host_no));
+
+				remote_fcport->iodesc_idx_sent =
+				    IODESC_ADISC_NEEDED;
+				set_bit(IODESC_PROCESS_NEEDED, &ha->dpc_flags);
+
+				return (QLA_SUCCESS);
+			}
+
+			iodesc->cb_idx = ADISC_PORT_IOCB_CB;
+			iodesc->d_id.b24 = rscn_pid.b24;
+			iodesc->remote_fcport = remote_fcport;
+			remote_fcport->iodesc_idx_sent = iodesc->idx;
+			qla2x00_send_adisc_iocb(ha, iodesc, ha_locked);
+
+			return (QLA_SUCCESS);
+		} else if (remote_fcport->iodesc_idx_sent <
+		    MAX_IO_DESCRIPTORS &&
+		    ha->io_descriptors[remote_fcport->iodesc_idx_sent].cb_idx ==
+		    ADISC_PORT_IOCB_CB) {
+			/*
+			 * Receiving another RSCN while an ADISC is pending,
+			 * abort the IOCB.  Use the same descriptor for the
+			 * abort.
+			 */
+			uint32_t handle_to_abort;
+			
+			iodesc = &ha->io_descriptors[
+				remote_fcport->iodesc_idx_sent];
+			qla2x00_remove_iodesc_timer(iodesc);
+			handle_to_abort = iodesc->signature;
+			iodesc->signature = qla2x00_iodesc_to_handle(iodesc);
+			iodesc->cb_idx = ABORT_IOCB_CB;
+			iodesc->d_id.b24 = remote_fcport->d_id.b24;
+			iodesc->remote_fcport = remote_fcport;
+			remote_fcport->iodesc_idx_sent = iodesc->idx;
+
+			DEBUG14(printk("scsi(%ld): Handle RSCN -- issuing "
+			    "abort to outstanding Adisc [%x/%02x%02x%02x].\n",
+			    ha->host_no, remote_fcport->loop_id,
+			    iodesc->d_id.b.domain, iodesc->d_id.b.area,
+			    iodesc->d_id.b.al_pa));
+
+			qla2x00_send_abort_iocb(ha, iodesc, handle_to_abort,
+			    ha_locked);
+		}
+	}
+
+	/* We need to login to the remote port, find it. */
+	if (known_fcport) {
+		remote_fcport = known_fcport;
+	} else if (rscn_fcport && rscn_fcport->d_id.b24 != INVALID_PORT_ID &&
+	    rscn_fcport->iodesc_idx_sent < MAX_IO_DESCRIPTORS &&
+	    ha->io_descriptors[rscn_fcport->iodesc_idx_sent].cb_idx ==
+	    LOGIN_PORT_IOCB_CB) {
+		/*
+		 * Ignore duplicate RSCN on fcport which has already
+		 * initiated a login IOCB.
+		 */
+		DEBUG14(printk("scsi(%ld): Handle RSCN -- ignoring, login "
+		    "already sent to [%02x%02x%02x].\n", ha->host_no,
+		    rscn_fcport->d_id.b.domain, rscn_fcport->d_id.b.area,
+		    rscn_fcport->d_id.b.al_pa));
+
+		return (QLA_SUCCESS);
+	} else if (rscn_fcport && rscn_fcport->d_id.b24 != INVALID_PORT_ID &&
+	    rscn_fcport != remote_fcport) {
+		/* Reuse same rscn fcport. */
+		DEBUG14(printk("scsi(%ld): Handle RSCN -- reusing RSCN fcport "
+		    "[%02x%02x%02x].\n", ha->host_no,
+		    rscn_fcport->d_id.b.domain, rscn_fcport->d_id.b.area,
+		    rscn_fcport->d_id.b.al_pa));
+
+		remote_fcport = rscn_fcport;
+	} else {
+		/* Create new fcport for later login. */
+		remote_fcport = qla2x00_alloc_rscn_fcport(ha,
+		    ha_locked ? GFP_ATOMIC: GFP_KERNEL);
+		list_add_tail(&remote_fcport->list, &ha->rscn_fcports);
+	}
+	if (remote_fcport == NULL)
+		return (QLA_SUCCESS);
+
+	/* Prepare fcport for login. */
+	atomic_set(&remote_fcport->state, FCS_DEVICE_LOST);
+	remote_fcport->login_retry = 3; /* ha->login_retry_count; */
+	remote_fcport->d_id.b24 = rscn_pid.b24;
+
+	iodesc = qla2x00_alloc_iodesc(ha);
+	if (iodesc == NULL) {
+		/* Mark fcport for later adisc processing. */
+		DEBUG14(printk("scsi(%ld): Handle RSCN -- not enough IO "
+		    "descriptors for Login, flag for later processing.\n",
+		    ha->host_no));
+
+		remote_fcport->iodesc_idx_sent = IODESC_LOGIN_NEEDED;
+		set_bit(IODESC_PROCESS_NEEDED, &ha->dpc_flags);
+
+		return (QLA_SUCCESS);
+	}
+
+	if (known_fcport == NULL || rscn_pid.b24 != INVALID_PORT_ID) {
+		remote_fcport->loop_id = ha->min_external_loopid;
+
+		rval = qla2x00_find_new_loop_id(ha, remote_fcport);
+		if (rval == QLA_FUNCTION_FAILED) {
+			/* No more loop ids, failed. */
+			DEBUG14(printk("scsi(%ld): Handle RSCN -- no available "
+			    "loop id to perform Login, failed.\n",
+			    ha->host_no));
+
+			return (rval);
+		}
+	}
+
+	iodesc->cb_idx = LOGIN_PORT_IOCB_CB;
+	iodesc->d_id.b24 = rscn_pid.b24;
+	iodesc->remote_fcport = remote_fcport;
+	remote_fcport->iodesc_idx_sent = iodesc->idx;
+
+	DEBUG14(printk("scsi(%ld): Handle RSCN -- attempting login to "
+	    "[%x/%02x%02x%02x].\n", ha->host_no, remote_fcport->loop_id,
+	    iodesc->d_id.b.domain, iodesc->d_id.b.area, iodesc->d_id.b.al_pa));
+
+	qla2x00_send_login_iocb(ha, iodesc, &rscn_pid, ha_locked);
+
+	return (QLA_SUCCESS);
+}
+
+/**
+ * qla2x00_process_iodesc() - Complete IO descriptor processing.
+ * @ha: HA context
+ * @mbxstat: Mailbox IOCB status
+ */
+void
+qla2x00_process_iodesc(scsi_qla_host_t *ha, struct mbx_entry *mbxstat)
+{
+	int rval;
+	uint32_t signature;
+	fc_port_t *fcport;
+	struct io_descriptor *iodesc;
+
+	signature = mbxstat->handle;
+
+	DEBUG14(printk("scsi(%ld): Process IODesc -- processing %08x.\n",
+	    ha->host_no, signature));
+
+	/* Retrieve proper IO descriptor. */
+	iodesc = qla2x00_handle_to_iodesc(ha, signature);
+	if (iodesc == NULL) {
+		DEBUG14(printk("scsi(%ld): Process IODesc -- ignoring, "
+		    "incorrect signature %08x.\n", ha->host_no, signature));
+
+		return;
+	}
+
+	/* Stop IO descriptor timer. */
+	qla2x00_remove_iodesc_timer(iodesc);
+
+	/* Verify signature match. */
+	if (iodesc->signature != signature) {
+		DEBUG14(printk("scsi(%ld): Process IODesc -- ignoring, "
+		    "signature mismatch, sent %08x, received %08x.\n",
+		    ha->host_no, iodesc->signature, signature));
+
+		return;
+	}
+
+	/* Go with IOCB callback. */
+	rval = iocb_function_cb_list[iodesc->cb_idx](ha, iodesc, mbxstat);
+	if (rval != QLA_SUCCESS) {
+		/* IO descriptor reused by callback. */
+		return;
+	}
+
+	qla2x00_free_iodesc(iodesc);
+
+	if (test_bit(IODESC_PROCESS_NEEDED, &ha->dpc_flags)) {
+		/* Scan our fcports list for any RSCN requests. */
+		list_for_each_entry(fcport, &ha->fcports, list) {
+			if (fcport->iodesc_idx_sent == IODESC_ADISC_NEEDED ||
+			    fcport->iodesc_idx_sent == IODESC_LOGIN_NEEDED) {
+				qla2x00_handle_port_rscn(ha, 0, fcport, 1);
+				return;
+			}
+		}
+
+		/* Scan our RSCN fcports list for any RSCN requests. */
+		list_for_each_entry(fcport, &ha->rscn_fcports, list) {
+			if (fcport->iodesc_idx_sent == IODESC_ADISC_NEEDED ||
+			    fcport->iodesc_idx_sent == IODESC_LOGIN_NEEDED) {
+				qla2x00_handle_port_rscn(ha, 0, fcport, 1);
+				return;
+			}
+		}
+	}
+	clear_bit(IODESC_PROCESS_NEEDED, &ha->dpc_flags);
+}
+
+/**
+ * qla2x00_cancel_io_descriptors() - Cancel all outstanding io descriptors.
+ * @ha: HA context
+ *
+ * This routine will also delete any RSCN entries related to the outstanding
+ * IO descriptors.
+ */
+void
+qla2x00_cancel_io_descriptors(scsi_qla_host_t *ha)
+{
+	fc_port_t *fcport, *fcptemp;
+
+	clear_bit(IODESC_PROCESS_NEEDED, &ha->dpc_flags);
+
+	/* Abort all IO descriptors. */
+	qla2x00_init_io_descriptors(ha);
+
+	/* Reset all pending IO descriptors in fcports list. */
+	list_for_each_entry(fcport, &ha->fcports, list) {
+		fcport->iodesc_idx_sent = IODESC_INVALID_INDEX;
+	}
+
+	/* Reset all pending IO descriptors in rscn fcports list. */
+	list_for_each_entry_safe(fcport, fcptemp, &ha->rscn_fcports, list) {
+		DEBUG14(printk("scsi(%ld): Cancel IOs -- Freeing RSCN fcport "
+		    "%p [%x/%02x%02x%02x].\n", ha->host_no, fcport,
+		    fcport->loop_id, fcport->d_id.b.domain, fcport->d_id.b.area,
+		    fcport->d_id.b.al_pa));
+
+		list_del(&fcport->list);
+		kfree(fcport);
+	}
+}