[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, 1230 insertions, 0 deletions

diff --git a/drivers/scsi/bfa/bfad_im.c b/drivers/scsi/bfa/bfad_im.c
new file mode 100644
index 000000000000..158c99243c08
--- /dev/null
+++ b/drivers/scsi/bfa/bfad_im.c
@@ -0,0 +1,1230 @@
+/*
+ * 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.
+ */
+
+/**
+ *  bfad_im.c Linux driver IM module.
+ */
+
+#include "bfad_drv.h"
+#include "bfad_im.h"
+#include "bfad_trcmod.h"
+#include "bfa_cb_ioim_macros.h"
+#include <fcb/bfa_fcb_fcpim.h>
+
+BFA_TRC_FILE(LDRV, IM);
+
+DEFINE_IDR(bfad_im_port_index);
+struct scsi_transport_template *bfad_im_scsi_transport_template;
+static void bfad_im_itnim_work_handler(struct work_struct *work);
+static int bfad_im_queuecommand(struct scsi_cmnd *cmnd,
+		void (*done)(struct scsi_cmnd *));
+static int bfad_im_slave_alloc(struct scsi_device *sdev);
+
+void
+bfa_cb_ioim_done(void *drv, struct bfad_ioim_s *dio,
+			enum bfi_ioim_status io_status, u8 scsi_status,
+			int sns_len, u8 *sns_info, s32 residue)
+{
+	struct scsi_cmnd *cmnd = (struct scsi_cmnd *)dio;
+	struct bfad_s         *bfad = drv;
+	struct bfad_itnim_data_s *itnim_data;
+	struct bfad_itnim_s *itnim;
+
+	switch (io_status) {
+	case BFI_IOIM_STS_OK:
+		bfa_trc(bfad, scsi_status);
+		cmnd->result = ScsiResult(DID_OK, scsi_status);
+		scsi_set_resid(cmnd, 0);
+
+		if (sns_len > 0) {
+			bfa_trc(bfad, sns_len);
+			if (sns_len > SCSI_SENSE_BUFFERSIZE)
+				sns_len = SCSI_SENSE_BUFFERSIZE;
+			memcpy(cmnd->sense_buffer, sns_info, sns_len);
+		}
+		if (residue > 0)
+			scsi_set_resid(cmnd, residue);
+		break;
+
+	case BFI_IOIM_STS_ABORTED:
+	case BFI_IOIM_STS_TIMEDOUT:
+	case BFI_IOIM_STS_PATHTOV:
+	default:
+		cmnd->result = ScsiResult(DID_ERROR, 0);
+	}
+
+	/* Unmap DMA, if host is NULL, it means a scsi passthru cmd */
+	if (cmnd->device->host != NULL)
+		scsi_dma_unmap(cmnd);
+
+	cmnd->host_scribble = NULL;
+	bfa_trc(bfad, cmnd->result);
+
+	itnim_data = cmnd->device->hostdata;
+	if (itnim_data) {
+		itnim = itnim_data->itnim;
+		if (!cmnd->result && itnim &&
+			 (bfa_lun_queue_depth > cmnd->device->queue_depth)) {
+			/* Queue depth adjustment for good status completion */
+			bfad_os_ramp_up_qdepth(itnim, cmnd->device);
+		} else if (cmnd->result == SAM_STAT_TASK_SET_FULL && itnim) {
+			/* qfull handling */
+			bfad_os_handle_qfull(itnim, cmnd->device);
+		}
+	}
+
+	cmnd->scsi_done(cmnd);
+}
+
+void
+bfa_cb_ioim_good_comp(void *drv, struct bfad_ioim_s *dio)
+{
+	struct scsi_cmnd *cmnd = (struct scsi_cmnd *)dio;
+	struct bfad_itnim_data_s *itnim_data;
+	struct bfad_itnim_s *itnim;
+
+	cmnd->result = ScsiResult(DID_OK, SCSI_STATUS_GOOD);
+
+	/* Unmap DMA, if host is NULL, it means a scsi passthru cmd */
+	if (cmnd->device->host != NULL)
+		scsi_dma_unmap(cmnd);
+
+	cmnd->host_scribble = NULL;
+
+	/* Queue depth adjustment */
+	if (bfa_lun_queue_depth > cmnd->device->queue_depth) {
+		itnim_data = cmnd->device->hostdata;
+		if (itnim_data) {
+			itnim = itnim_data->itnim;
+			if (itnim)
+				bfad_os_ramp_up_qdepth(itnim, cmnd->device);
+		}
+	}
+
+	cmnd->scsi_done(cmnd);
+}
+
+void
+bfa_cb_ioim_abort(void *drv, struct bfad_ioim_s *dio)
+{
+	struct scsi_cmnd *cmnd = (struct scsi_cmnd *)dio;
+	struct bfad_s         *bfad = drv;
+
+	cmnd->result = ScsiResult(DID_ERROR, 0);
+
+	/* Unmap DMA, if host is NULL, it means a scsi passthru cmd */
+	if (cmnd->device->host != NULL)
+		scsi_dma_unmap(cmnd);
+
+	bfa_trc(bfad, cmnd->result);
+	cmnd->host_scribble = NULL;
+}
+
+void
+bfa_cb_tskim_done(void *bfad, struct bfad_tskim_s *dtsk,
+		   enum bfi_tskim_status tsk_status)
+{
+	struct scsi_cmnd *cmnd = (struct scsi_cmnd *)dtsk;
+	wait_queue_head_t *wq;
+
+	cmnd->SCp.Status |= tsk_status << 1;
+	set_bit(IO_DONE_BIT, (unsigned long *)&cmnd->SCp.Status);
+	wq = (wait_queue_head_t *) cmnd->SCp.ptr;
+	cmnd->SCp.ptr = NULL;
+
+	if (wq)
+		wake_up(wq);
+}
+
+void
+bfa_cb_ioim_resfree(void *drv)
+{
+}
+
+/**
+ *  Scsi_Host_template SCSI host template
+ */
+/**
+ * Scsi_Host template entry, returns BFAD PCI info.
+ */
+static const char *
+bfad_im_info(struct Scsi_Host *shost)
+{
+	static char     bfa_buf[256];
+	struct bfad_im_port_s *im_port =
+			(struct bfad_im_port_s *) shost->hostdata[0];
+	struct bfa_ioc_attr_s  ioc_attr;
+	struct bfad_s         *bfad = im_port->bfad;
+
+	memset(&ioc_attr, 0, sizeof(ioc_attr));
+	bfa_get_attr(&bfad->bfa, &ioc_attr);
+
+	memset(bfa_buf, 0, sizeof(bfa_buf));
+	snprintf(bfa_buf, sizeof(bfa_buf),
+		 "Brocade FC/FCOE Adapter, " "model: %s hwpath: %s driver: %s",
+		 ioc_attr.adapter_attr.model, bfad->pci_name,
+		 BFAD_DRIVER_VERSION);
+	return bfa_buf;
+}
+
+/**
+ * Scsi_Host template entry, aborts the specified SCSI command.
+ *
+ * Returns: SUCCESS or FAILED.
+ */
+static int
+bfad_im_abort_handler(struct scsi_cmnd *cmnd)
+{
+	struct Scsi_Host *shost = cmnd->device->host;
+	struct bfad_im_port_s *im_port =
+			(struct bfad_im_port_s *) shost->hostdata[0];
+	struct bfad_s         *bfad = im_port->bfad;
+	struct bfa_ioim_s *hal_io;
+	unsigned long   flags;
+	u32        timeout;
+	int             rc = FAILED;
+
+	spin_lock_irqsave(&bfad->bfad_lock, flags);
+	hal_io = (struct bfa_ioim_s *) cmnd->host_scribble;
+	if (!hal_io) {
+		/* IO has been completed, retrun success */
+		rc = SUCCESS;
+		goto out;
+	}
+	if (hal_io->dio != (struct bfad_ioim_s *) cmnd) {
+		rc = FAILED;
+		goto out;
+	}
+
+	bfa_trc(bfad, hal_io->iotag);
+	bfa_log(bfad->logmod, BFA_LOG_LINUX_SCSI_ABORT,
+		im_port->shost->host_no, cmnd, hal_io->iotag);
+	bfa_ioim_abort(hal_io);
+	spin_unlock_irqrestore(&bfad->bfad_lock, flags);
+
+	/* Need to wait until the command get aborted */
+	timeout = 10;
+	while ((struct bfa_ioim_s *) cmnd->host_scribble == hal_io) {
+		set_current_state(TASK_UNINTERRUPTIBLE);
+		schedule_timeout(timeout);
+		if (timeout < 4 * HZ)
+			timeout *= 2;
+	}
+
+	cmnd->scsi_done(cmnd);
+	bfa_trc(bfad, hal_io->iotag);
+	bfa_log(bfad->logmod, BFA_LOG_LINUX_SCSI_ABORT_COMP,
+		im_port->shost->host_no, cmnd, hal_io->iotag);
+	return SUCCESS;
+out:
+	spin_unlock_irqrestore(&bfad->bfad_lock, flags);
+	return rc;
+}
+
+static bfa_status_t
+bfad_im_target_reset_send(struct bfad_s *bfad, struct scsi_cmnd *cmnd,
+		     struct bfad_itnim_s *itnim)
+{
+	struct bfa_tskim_s *tskim;
+	struct bfa_itnim_s *bfa_itnim;
+	bfa_status_t    rc = BFA_STATUS_OK;
+
+	bfa_itnim = bfa_fcs_itnim_get_halitn(&itnim->fcs_itnim);
+	tskim = bfa_tskim_alloc(&bfad->bfa, (struct bfad_tskim_s *) cmnd);
+	if (!tskim) {
+		BFA_DEV_PRINTF(bfad, BFA_ERR,
+			       "target reset, fail to allocate tskim\n");
+		rc = BFA_STATUS_FAILED;
+		goto out;
+	}
+
+	/*
+	 * Set host_scribble to NULL to avoid aborting a task command if
+	 * happens.
+	 */
+	cmnd->host_scribble = NULL;
+	cmnd->SCp.Status = 0;
+	bfa_itnim = bfa_fcs_itnim_get_halitn(&itnim->fcs_itnim);
+	bfa_tskim_start(tskim, bfa_itnim, (lun_t)0,
+			    FCP_TM_TARGET_RESET, BFAD_TARGET_RESET_TMO);
+out:
+	return rc;
+}
+
+/**
+ * Scsi_Host template entry, resets a LUN and abort its all commands.
+ *
+ * Returns: SUCCESS or FAILED.
+ *
+ */
+static int
+bfad_im_reset_lun_handler(struct scsi_cmnd *cmnd)
+{
+	struct Scsi_Host *shost = cmnd->device->host;
+	struct bfad_im_port_s *im_port =
+			(struct bfad_im_port_s *) shost->hostdata[0];
+	struct bfad_itnim_data_s *itnim_data = cmnd->device->hostdata;
+	struct bfad_s         *bfad = im_port->bfad;
+	struct bfa_tskim_s *tskim;
+	struct bfad_itnim_s   *itnim;
+	struct bfa_itnim_s *bfa_itnim;
+	DECLARE_WAIT_QUEUE_HEAD(wq);
+	int             rc = SUCCESS;
+	unsigned long   flags;
+	enum bfi_tskim_status task_status;
+
+	spin_lock_irqsave(&bfad->bfad_lock, flags);
+	itnim = itnim_data->itnim;
+	if (!itnim) {
+		spin_unlock_irqrestore(&bfad->bfad_lock, flags);
+		rc = FAILED;
+		goto out;
+	}
+
+	tskim = bfa_tskim_alloc(&bfad->bfa, (struct bfad_tskim_s *) cmnd);
+	if (!tskim) {
+		BFA_DEV_PRINTF(bfad, BFA_ERR,
+				"LUN reset, fail to allocate tskim");
+		spin_unlock_irqrestore(&bfad->bfad_lock, flags);
+		rc = FAILED;
+		goto out;
+	}
+
+	/**
+	 * Set host_scribble to NULL to avoid aborting a task command
+	 * if happens.
+	 */
+	cmnd->host_scribble = NULL;
+	cmnd->SCp.ptr = (char *)&wq;
+	cmnd->SCp.Status = 0;
+	bfa_itnim = bfa_fcs_itnim_get_halitn(&itnim->fcs_itnim);
+	bfa_tskim_start(tskim, bfa_itnim,
+			    bfad_int_to_lun(cmnd->device->lun),
+			    FCP_TM_LUN_RESET, BFAD_LUN_RESET_TMO);
+	spin_unlock_irqrestore(&bfad->bfad_lock, flags);
+
+	wait_event(wq, test_bit(IO_DONE_BIT,
+			(unsigned long *)&cmnd->SCp.Status));
+
+	task_status = cmnd->SCp.Status >> 1;
+	if (task_status != BFI_TSKIM_STS_OK) {
+		BFA_DEV_PRINTF(bfad, BFA_ERR, "LUN reset failure, status: %d\n",
+			       task_status);
+		rc = FAILED;
+	}
+
+out:
+	return rc;
+}
+
+/**
+ * Scsi_Host template entry, resets the bus and abort all commands.
+ */
+static int
+bfad_im_reset_bus_handler(struct scsi_cmnd *cmnd)
+{
+	struct Scsi_Host *shost = cmnd->device->host;
+	struct bfad_im_port_s *im_port =
+				(struct bfad_im_port_s *) shost->hostdata[0];
+	struct bfad_s         *bfad = im_port->bfad;
+	struct bfad_itnim_s   *itnim;
+	unsigned long   flags;
+	u32        i, rc, err_cnt = 0;
+	DECLARE_WAIT_QUEUE_HEAD(wq);
+	enum bfi_tskim_status task_status;
+
+	spin_lock_irqsave(&bfad->bfad_lock, flags);
+	for (i = 0; i < MAX_FCP_TARGET; i++) {
+		itnim = bfad_os_get_itnim(im_port, i);
+		if (itnim) {
+			cmnd->SCp.ptr = (char *)&wq;
+			rc = bfad_im_target_reset_send(bfad, cmnd, itnim);
+			if (rc != BFA_STATUS_OK) {
+				err_cnt++;
+				continue;
+			}
+
+			/* wait target reset to complete */
+			spin_unlock_irqrestore(&bfad->bfad_lock, flags);
+			wait_event(wq, test_bit(IO_DONE_BIT,
+					(unsigned long *)&cmnd->SCp.Status));
+			spin_lock_irqsave(&bfad->bfad_lock, flags);
+
+			task_status = cmnd->SCp.Status >> 1;
+			if (task_status != BFI_TSKIM_STS_OK) {
+				BFA_DEV_PRINTF(bfad, BFA_ERR,
+					"target reset failure,"
+					" status: %d\n", task_status);
+				err_cnt++;
+			}
+		}
+	}
+	spin_unlock_irqrestore(&bfad->bfad_lock, flags);
+
+	if (err_cnt)
+		return FAILED;
+
+	return SUCCESS;
+}
+
+/**
+ * Scsi_Host template entry slave_destroy.
+ */
+static void
+bfad_im_slave_destroy(struct scsi_device *sdev)
+{
+	sdev->hostdata = NULL;
+	return;
+}
+
+/**
+ *  BFA FCS itnim callbacks
+ */
+
+/**
+ * BFA FCS itnim alloc callback, after successful PRLI
+ * Context: Interrupt
+ */
+void
+bfa_fcb_itnim_alloc(struct bfad_s *bfad, struct bfa_fcs_itnim_s **itnim,
+		    struct bfad_itnim_s **itnim_drv)
+{
+	*itnim_drv = kzalloc(sizeof(struct bfad_itnim_s), GFP_ATOMIC);
+	if (*itnim_drv == NULL)
+		return;
+
+	(*itnim_drv)->im = bfad->im;
+	*itnim = &(*itnim_drv)->fcs_itnim;
+	(*itnim_drv)->state = ITNIM_STATE_NONE;
+
+	/*
+	 * Initiaze the itnim_work
+	 */
+	INIT_WORK(&(*itnim_drv)->itnim_work, bfad_im_itnim_work_handler);
+	bfad->bfad_flags |= BFAD_RPORT_ONLINE;
+}
+
+/**
+ * BFA FCS itnim free callback.
+ * Context: Interrupt. bfad_lock is held
+ */
+void
+bfa_fcb_itnim_free(struct bfad_s *bfad, struct bfad_itnim_s *itnim_drv)
+{
+	struct bfad_port_s    *port;
+	wwn_t wwpn;
+	u32 fcid;
+	char wwpn_str[32], fcid_str[16];
+
+	/* online to free state transtion should not happen */
+	bfa_assert(itnim_drv->state != ITNIM_STATE_ONLINE);
+
+	itnim_drv->queue_work = 1;
+	/* offline request is not yet done, use the same request to free */
+	if (itnim_drv->state == ITNIM_STATE_OFFLINE_PENDING)
+		itnim_drv->queue_work = 0;
+
+	itnim_drv->state = ITNIM_STATE_FREE;
+	port = bfa_fcs_itnim_get_drvport(&itnim_drv->fcs_itnim);
+	itnim_drv->im_port = port->im_port;
+	wwpn = bfa_fcs_itnim_get_pwwn(&itnim_drv->fcs_itnim);
+	fcid = bfa_fcs_itnim_get_fcid(&itnim_drv->fcs_itnim);
+	wwn2str(wwpn_str, wwpn);
+	fcid2str(fcid_str, fcid);
+	bfa_log(bfad->logmod, BFA_LOG_LINUX_ITNIM_FREE,
+		port->im_port->shost->host_no,
+		fcid_str, wwpn_str);
+	bfad_os_itnim_process(itnim_drv);
+}
+
+/**
+ * BFA FCS itnim online callback.
+ * Context: Interrupt. bfad_lock is held
+ */
+void
+bfa_fcb_itnim_online(struct bfad_itnim_s *itnim_drv)
+{
+	struct bfad_port_s    *port;
+
+	itnim_drv->bfa_itnim = bfa_fcs_itnim_get_halitn(&itnim_drv->fcs_itnim);
+	port = bfa_fcs_itnim_get_drvport(&itnim_drv->fcs_itnim);
+	itnim_drv->state = ITNIM_STATE_ONLINE;
+	itnim_drv->queue_work = 1;
+	itnim_drv->im_port = port->im_port;
+	bfad_os_itnim_process(itnim_drv);
+}
+
+/**
+ * BFA FCS itnim offline callback.
+ * Context: Interrupt. bfad_lock is held
+ */
+void
+bfa_fcb_itnim_offline(struct bfad_itnim_s *itnim_drv)
+{
+	struct bfad_port_s    *port;
+	struct bfad_s *bfad;
+
+	port = bfa_fcs_itnim_get_drvport(&itnim_drv->fcs_itnim);
+	bfad = port->bfad;
+	if ((bfad->pport.flags & BFAD_PORT_DELETE) ||
+		 (port->flags & BFAD_PORT_DELETE)) {
+		itnim_drv->state = ITNIM_STATE_OFFLINE;
+		return;
+	}
+	itnim_drv->im_port = port->im_port;
+	itnim_drv->state = ITNIM_STATE_OFFLINE_PENDING;
+	itnim_drv->queue_work = 1;
+	bfad_os_itnim_process(itnim_drv);
+}
+
+/**
+ * BFA FCS itnim timeout callback.
+ * Context: Interrupt. bfad_lock is held
+ */
+void bfa_fcb_itnim_tov(struct bfad_itnim_s *itnim)
+{
+	itnim->state = ITNIM_STATE_TIMEOUT;
+}
+
+/**
+ * Path TOV processing begin notification -- dummy for linux
+ */
+void
+bfa_fcb_itnim_tov_begin(struct bfad_itnim_s *itnim)
+{
+}
+
+
+
+/**
+ * Allocate a Scsi_Host for a port.
+ */
+int
+bfad_im_scsi_host_alloc(struct bfad_s *bfad, struct bfad_im_port_s *im_port)
+{
+	int error = 1;
+
+	if (!idr_pre_get(&bfad_im_port_index, GFP_KERNEL)) {
+		printk(KERN_WARNING "idr_pre_get failure\n");
+		goto out;
+	}
+
+	error = idr_get_new(&bfad_im_port_index, im_port,
+					 &im_port->idr_id);
+	if (error) {
+		printk(KERN_WARNING "idr_get_new failure\n");
+		goto out;
+	}
+
+	im_port->shost = bfad_os_scsi_host_alloc(im_port, bfad);
+	if (!im_port->shost) {
+		error = 1;
+		goto out_free_idr;
+	}
+
+	im_port->shost->hostdata[0] = (unsigned long)im_port;
+	im_port->shost->unique_id = im_port->idr_id;
+	im_port->shost->this_id = -1;
+	im_port->shost->max_id = MAX_FCP_TARGET;
+	im_port->shost->max_lun = MAX_FCP_LUN;
+	im_port->shost->max_cmd_len = 16;
+	im_port->shost->can_queue = bfad->cfg_data.ioc_queue_depth;
+	im_port->shost->transportt = bfad_im_scsi_transport_template;
+
+	error = bfad_os_scsi_add_host(im_port->shost, im_port, bfad);
+	if (error) {
+		printk(KERN_WARNING "bfad_os_scsi_add_host failure %d\n",
+							error);
+		goto out_fc_rel;
+	}
+
+	/* setup host fixed attribute if the lk supports */
+	bfad_os_fc_host_init(im_port);
+
+	return 0;
+
+out_fc_rel:
+	scsi_host_put(im_port->shost);
+out_free_idr:
+	idr_remove(&bfad_im_port_index, im_port->idr_id);
+out:
+	return error;
+}
+
+void
+bfad_im_scsi_host_free(struct bfad_s *bfad, struct bfad_im_port_s *im_port)
+{
+	unsigned long flags;
+
+	bfa_trc(bfad, bfad->inst_no);
+	bfa_log(bfad->logmod, BFA_LOG_LINUX_SCSI_HOST_FREE,
+			im_port->shost->host_no);
+
+	fc_remove_host(im_port->shost);
+
+	scsi_remove_host(im_port->shost);
+	scsi_host_put(im_port->shost);
+
+	spin_lock_irqsave(&bfad->bfad_lock, flags);
+	idr_remove(&bfad_im_port_index, im_port->idr_id);
+	spin_unlock_irqrestore(&bfad->bfad_lock, flags);
+}
+
+static void
+bfad_im_port_delete_handler(struct work_struct *work)
+{
+	struct bfad_im_port_s *im_port =
+		container_of(work, struct bfad_im_port_s, port_delete_work);
+
+	bfad_im_scsi_host_free(im_port->bfad, im_port);
+	bfad_im_port_clean(im_port);
+	kfree(im_port);
+}
+
+bfa_status_t
+bfad_im_port_new(struct bfad_s *bfad, struct bfad_port_s *port)
+{
+	int             rc = BFA_STATUS_OK;
+	struct bfad_im_port_s *im_port;
+
+	im_port = kzalloc(sizeof(struct bfad_im_port_s), GFP_ATOMIC);
+	if (im_port == NULL) {
+		rc = BFA_STATUS_ENOMEM;
+		goto ext;
+	}
+	port->im_port = im_port;
+	im_port->port = port;
+	im_port->bfad = bfad;
+
+	INIT_WORK(&im_port->port_delete_work, bfad_im_port_delete_handler);
+	INIT_LIST_HEAD(&im_port->itnim_mapped_list);
+	INIT_LIST_HEAD(&im_port->binding_list);
+
+ext:
+	return rc;
+}
+
+void
+bfad_im_port_delete(struct bfad_s *bfad, struct bfad_port_s *port)
+{
+	struct bfad_im_port_s *im_port = port->im_port;
+
+	queue_work(bfad->im->drv_workq,
+				&im_port->port_delete_work);
+}
+
+void
+bfad_im_port_clean(struct bfad_im_port_s *im_port)
+{
+	struct bfad_fcp_binding *bp, *bp_new;
+	unsigned long flags;
+	struct bfad_s *bfad =  im_port->bfad;
+
+	spin_lock_irqsave(&bfad->bfad_lock, flags);
+	list_for_each_entry_safe(bp, bp_new, &im_port->binding_list,
+					list_entry) {
+		list_del(&bp->list_entry);
+		kfree(bp);
+	}
+
+	/* the itnim_mapped_list must be empty at this time */
+	bfa_assert(list_empty(&im_port->itnim_mapped_list));
+
+	spin_unlock_irqrestore(&bfad->bfad_lock, flags);
+}
+
+void
+bfad_im_port_online(struct bfad_s *bfad, struct bfad_port_s *port)
+{
+}
+
+void
+bfad_im_port_offline(struct bfad_s *bfad, struct bfad_port_s *port)
+{
+}
+
+bfa_status_t
+bfad_im_probe(struct bfad_s *bfad)
+{
+	struct bfad_im_s      *im;
+	bfa_status_t    rc = BFA_STATUS_OK;
+
+	im = kzalloc(sizeof(struct bfad_im_s), GFP_KERNEL);
+	if (im == NULL) {
+		rc = BFA_STATUS_ENOMEM;
+		goto ext;
+	}
+
+	bfad->im = im;
+	im->bfad = bfad;
+
+	if (bfad_os_thread_workq(bfad) != BFA_STATUS_OK) {
+		kfree(im);
+		rc = BFA_STATUS_FAILED;
+	}
+
+ext:
+	return rc;
+}
+
+void
+bfad_im_probe_undo(struct bfad_s *bfad)
+{
+	if (bfad->im) {
+		bfad_os_destroy_workq(bfad->im);
+		kfree(bfad->im);
+		bfad->im = NULL;
+	}
+}
+
+
+
+
+int
+bfad_os_scsi_add_host(struct Scsi_Host *shost, struct bfad_im_port_s *im_port,
+			struct bfad_s *bfad)
+{
+    struct device *dev;
+
+    if (im_port->port->pvb_type == BFAD_PORT_PHYS_BASE)
+		dev = &bfad->pcidev->dev;
+    else
+		dev = &bfad->pport.im_port->shost->shost_gendev;
+
+    return scsi_add_host(shost, dev);
+}
+
+struct Scsi_Host *
+bfad_os_scsi_host_alloc(struct bfad_im_port_s *im_port, struct bfad_s *bfad)
+{
+	struct scsi_host_template *sht;
+
+	if (im_port->port->pvb_type == BFAD_PORT_PHYS_BASE)
+		sht = &bfad_im_scsi_host_template;
+	else
+		sht = &bfad_im_vport_template;
+
+	sht->sg_tablesize = bfad->cfg_data.io_max_sge;
+
+	return scsi_host_alloc(sht, sizeof(unsigned long));
+}
+
+void
+bfad_os_scsi_host_free(struct bfad_s *bfad, struct bfad_im_port_s *im_port)
+{
+	flush_workqueue(bfad->im->drv_workq);
+	bfad_im_scsi_host_free(im_port->bfad, im_port);
+	bfad_im_port_clean(im_port);
+	kfree(im_port);
+}
+
+void
+bfad_os_destroy_workq(struct bfad_im_s *im)
+{
+	if (im && im->drv_workq) {
+		destroy_workqueue(im->drv_workq);
+		im->drv_workq = NULL;
+	}
+}
+
+bfa_status_t
+bfad_os_thread_workq(struct bfad_s *bfad)
+{
+	struct bfad_im_s      *im = bfad->im;
+
+	bfa_trc(bfad, 0);
+	snprintf(im->drv_workq_name, BFAD_KOBJ_NAME_LEN, "bfad_wq_%d",
+		 bfad->inst_no);
+	im->drv_workq = create_singlethread_workqueue(im->drv_workq_name);
+	if (!im->drv_workq)
+		return BFA_STATUS_FAILED;
+
+	return BFA_STATUS_OK;
+}
+
+/**
+ * Scsi_Host template entry.
+ *
+ * Description:
+ * OS entry point to adjust the queue_depths on a per-device basis.
+ * Called once per device during the bus scan.
+ * Return non-zero if fails.
+ */
+static int
+bfad_im_slave_configure(struct scsi_device *sdev)
+{
+	if (sdev->tagged_supported)
+		scsi_activate_tcq(sdev, bfa_lun_queue_depth);
+	else
+		scsi_deactivate_tcq(sdev, bfa_lun_queue_depth);
+
+	return 0;
+}
+
+struct scsi_host_template bfad_im_scsi_host_template = {
+	.module = THIS_MODULE,
+	.name = BFAD_DRIVER_NAME,
+	.info = bfad_im_info,
+	.queuecommand = bfad_im_queuecommand,
+	.eh_abort_handler = bfad_im_abort_handler,
+	.eh_device_reset_handler = bfad_im_reset_lun_handler,
+	.eh_bus_reset_handler = bfad_im_reset_bus_handler,
+
+	.slave_alloc = bfad_im_slave_alloc,
+	.slave_configure = bfad_im_slave_configure,
+	.slave_destroy = bfad_im_slave_destroy,
+
+	.this_id = -1,
+	.sg_tablesize = BFAD_IO_MAX_SGE,
+	.cmd_per_lun = 3,
+	.use_clustering = ENABLE_CLUSTERING,
+	.shost_attrs = bfad_im_host_attrs,
+	.max_sectors = 0xFFFF,
+};
+
+struct scsi_host_template bfad_im_vport_template = {
+	.module = THIS_MODULE,
+	.name = BFAD_DRIVER_NAME,
+	.info = bfad_im_info,
+	.queuecommand = bfad_im_queuecommand,
+	.eh_abort_handler = bfad_im_abort_handler,
+	.eh_device_reset_handler = bfad_im_reset_lun_handler,
+	.eh_bus_reset_handler = bfad_im_reset_bus_handler,
+
+	.slave_alloc = bfad_im_slave_alloc,
+	.slave_configure = bfad_im_slave_configure,
+	.slave_destroy = bfad_im_slave_destroy,
+
+	.this_id = -1,
+	.sg_tablesize = BFAD_IO_MAX_SGE,
+	.cmd_per_lun = 3,
+	.use_clustering = ENABLE_CLUSTERING,
+	.shost_attrs = bfad_im_vport_attrs,
+	.max_sectors = 0xFFFF,
+};
+
+void
+bfad_im_probe_post(struct bfad_im_s *im)
+{
+	flush_workqueue(im->drv_workq);
+}
+
+bfa_status_t
+bfad_im_module_init(void)
+{
+	bfad_im_scsi_transport_template =
+		fc_attach_transport(&bfad_im_fc_function_template);
+	if (!bfad_im_scsi_transport_template)
+		return BFA_STATUS_ENOMEM;
+
+	return BFA_STATUS_OK;
+}
+
+void
+bfad_im_module_exit(void)
+{
+	if (bfad_im_scsi_transport_template)
+		fc_release_transport(bfad_im_scsi_transport_template);
+}
+
+void
+bfad_os_itnim_process(struct bfad_itnim_s *itnim_drv)
+{
+	struct bfad_im_s      *im = itnim_drv->im;
+
+	if (itnim_drv->queue_work)
+		queue_work(im->drv_workq, &itnim_drv->itnim_work);
+}
+
+void
+bfad_os_ramp_up_qdepth(struct bfad_itnim_s *itnim, struct scsi_device *sdev)
+{
+	struct scsi_device *tmp_sdev;
+
+	if (((jiffies - itnim->last_ramp_up_time) >
+		BFA_QUEUE_FULL_RAMP_UP_TIME * HZ) &&
+		((jiffies - itnim->last_queue_full_time) >
+		BFA_QUEUE_FULL_RAMP_UP_TIME * HZ)) {
+		shost_for_each_device(tmp_sdev, sdev->host) {
+			if (bfa_lun_queue_depth > tmp_sdev->queue_depth) {
+				if (tmp_sdev->id != sdev->id)
+					continue;
+				if (tmp_sdev->ordered_tags)
+					scsi_adjust_queue_depth(tmp_sdev,
+						MSG_ORDERED_TAG,
+						tmp_sdev->queue_depth + 1);
+				else
+					scsi_adjust_queue_depth(tmp_sdev,
+						MSG_SIMPLE_TAG,
+						tmp_sdev->queue_depth + 1);
+
+				itnim->last_ramp_up_time = jiffies;
+			}
+		}
+	}
+}
+
+void
+bfad_os_handle_qfull(struct bfad_itnim_s *itnim, struct scsi_device *sdev)
+{
+	struct scsi_device *tmp_sdev;
+
+	itnim->last_queue_full_time = jiffies;
+
+	shost_for_each_device(tmp_sdev, sdev->host) {
+		if (tmp_sdev->id != sdev->id)
+			continue;
+		scsi_track_queue_full(tmp_sdev, tmp_sdev->queue_depth - 1);
+	}
+}
+
+
+
+
+struct bfad_itnim_s *
+bfad_os_get_itnim(struct bfad_im_port_s *im_port, int id)
+{
+	struct bfad_itnim_s   *itnim = NULL;
+
+	/* Search the mapped list for this target ID */
+	list_for_each_entry(itnim, &im_port->itnim_mapped_list, list_entry) {
+		if (id == itnim->scsi_tgt_id)
+			return itnim;
+	}
+
+	return NULL;
+}
+
+/**
+ * Scsi_Host template entry slave_alloc
+ */
+static int
+bfad_im_slave_alloc(struct scsi_device *sdev)
+{
+	struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
+
+	if (!rport || fc_remote_port_chkready(rport))
+		return -ENXIO;
+
+	sdev->hostdata = rport->dd_data;
+
+	return 0;
+}
+
+void
+bfad_os_fc_host_init(struct bfad_im_port_s *im_port)
+{
+	struct Scsi_Host *host = im_port->shost;
+	struct bfad_s         *bfad = im_port->bfad;
+	struct bfad_port_s    *port = im_port->port;
+	union attr {
+		struct bfa_pport_attr_s pattr;
+		struct bfa_ioc_attr_s  ioc_attr;
+	} attr;
+
+	fc_host_node_name(host) =
+		bfa_os_htonll((bfa_fcs_port_get_nwwn(port->fcs_port)));
+	fc_host_port_name(host) =
+		bfa_os_htonll((bfa_fcs_port_get_pwwn(port->fcs_port)));
+
+	fc_host_supported_classes(host) = FC_COS_CLASS3;
+
+	memset(fc_host_supported_fc4s(host), 0,
+	       sizeof(fc_host_supported_fc4s(host)));
+	if (bfad_supported_fc4s & (BFA_PORT_ROLE_FCP_IM | BFA_PORT_ROLE_FCP_TM))
+		/* For FCP type 0x08 */
+		fc_host_supported_fc4s(host)[2] = 1;
+	if (bfad_supported_fc4s | BFA_PORT_ROLE_FCP_IPFC)
+		/* For LLC/SNAP type 0x05 */
+		fc_host_supported_fc4s(host)[3] = 0x20;
+	/* For fibre channel services type 0x20 */
+	fc_host_supported_fc4s(host)[7] = 1;
+
+	memset(&attr.ioc_attr, 0, sizeof(attr.ioc_attr));
+	bfa_get_attr(&bfad->bfa, &attr.ioc_attr);
+	sprintf(fc_host_symbolic_name(host), "Brocade %s FV%s DV%s",
+		attr.ioc_attr.adapter_attr.model,
+		attr.ioc_attr.adapter_attr.fw_ver, BFAD_DRIVER_VERSION);
+
+	fc_host_supported_speeds(host) = 0;
+	fc_host_supported_speeds(host) |=
+		FC_PORTSPEED_8GBIT | FC_PORTSPEED_4GBIT | FC_PORTSPEED_2GBIT |
+		FC_PORTSPEED_1GBIT;
+
+	memset(&attr.pattr, 0, sizeof(attr.pattr));
+	bfa_pport_get_attr(&bfad->bfa, &attr.pattr);
+	fc_host_maxframe_size(host) = attr.pattr.pport_cfg.maxfrsize;
+}
+
+static void
+bfad_im_fc_rport_add(struct bfad_im_port_s *im_port, struct bfad_itnim_s *itnim)
+{
+	struct fc_rport_identifiers rport_ids;
+	struct fc_rport *fc_rport;
+	struct bfad_itnim_data_s *itnim_data;
+
+	rport_ids.node_name =
+		bfa_os_htonll(bfa_fcs_itnim_get_nwwn(&itnim->fcs_itnim));
+	rport_ids.port_name =
+		bfa_os_htonll(bfa_fcs_itnim_get_pwwn(&itnim->fcs_itnim));
+	rport_ids.port_id =
+		bfa_os_hton3b(bfa_fcs_itnim_get_fcid(&itnim->fcs_itnim));
+	rport_ids.roles = FC_RPORT_ROLE_UNKNOWN;
+
+	itnim->fc_rport = fc_rport =
+		fc_remote_port_add(im_port->shost, 0, &rport_ids);
+
+	if (!fc_rport)
+		return;
+
+	fc_rport->maxframe_size =
+		bfa_fcs_itnim_get_maxfrsize(&itnim->fcs_itnim);
+	fc_rport->supported_classes = bfa_fcs_itnim_get_cos(&itnim->fcs_itnim);
+
+	itnim_data = fc_rport->dd_data;
+	itnim_data->itnim = itnim;
+
+	rport_ids.roles |= FC_RPORT_ROLE_FCP_TARGET;
+
+	if (rport_ids.roles != FC_RPORT_ROLE_UNKNOWN)
+		fc_remote_port_rolechg(fc_rport, rport_ids.roles);
+
+	if ((fc_rport->scsi_target_id != -1)
+	    && (fc_rport->scsi_target_id < MAX_FCP_TARGET))
+		itnim->scsi_tgt_id = fc_rport->scsi_target_id;
+
+	return;
+}
+
+/**
+ * Work queue handler using FC transport service
+* Context: kernel
+ */
+static void
+bfad_im_itnim_work_handler(struct work_struct *work)
+{
+	struct bfad_itnim_s   *itnim = container_of(work, struct bfad_itnim_s,
+							itnim_work);
+	struct bfad_im_s      *im = itnim->im;
+	struct bfad_s         *bfad = im->bfad;
+	struct bfad_im_port_s *im_port;
+	unsigned long   flags;
+	struct fc_rport *fc_rport;
+	wwn_t wwpn;
+	u32 fcid;
+	char wwpn_str[32], fcid_str[16];
+
+	spin_lock_irqsave(&bfad->bfad_lock, flags);
+	im_port = itnim->im_port;
+	bfa_trc(bfad, itnim->state);
+	switch (itnim->state) {
+	case ITNIM_STATE_ONLINE:
+		if (!itnim->fc_rport) {
+			spin_unlock_irqrestore(&bfad->bfad_lock, flags);
+			bfad_im_fc_rport_add(im_port, itnim);
+			spin_lock_irqsave(&bfad->bfad_lock, flags);
+			wwpn = bfa_fcs_itnim_get_pwwn(&itnim->fcs_itnim);
+			fcid = bfa_fcs_itnim_get_fcid(&itnim->fcs_itnim);
+			wwn2str(wwpn_str, wwpn);
+			fcid2str(fcid_str, fcid);
+			list_add_tail(&itnim->list_entry,
+				&im_port->itnim_mapped_list);
+			bfa_log(bfad->logmod, BFA_LOG_LINUX_ITNIM_ONLINE,
+				im_port->shost->host_no,
+				itnim->scsi_tgt_id,
+				fcid_str, wwpn_str);
+		} else {
+			printk(KERN_WARNING
+				"%s: itnim %llx is already in online state\n",
+				__FUNCTION__,
+				bfa_fcs_itnim_get_pwwn(&itnim->fcs_itnim));
+		}
+
+		break;
+	case ITNIM_STATE_OFFLINE_PENDING:
+		itnim->state = ITNIM_STATE_OFFLINE;
+		if (itnim->fc_rport) {
+			fc_rport = itnim->fc_rport;
+			((struct bfad_itnim_data_s *)
+				fc_rport->dd_data)->itnim = NULL;
+			itnim->fc_rport = NULL;
+			if (!(im_port->port->flags & BFAD_PORT_DELETE)) {
+				spin_unlock_irqrestore(&bfad->bfad_lock, flags);
+				fc_rport->dev_loss_tmo =
+					bfa_fcpim_path_tov_get(&bfad->bfa) + 1;
+				fc_remote_port_delete(fc_rport);
+				spin_lock_irqsave(&bfad->bfad_lock, flags);
+			}
+			wwpn = bfa_fcs_itnim_get_pwwn(&itnim->fcs_itnim);
+			fcid = bfa_fcs_itnim_get_fcid(&itnim->fcs_itnim);
+			wwn2str(wwpn_str, wwpn);
+			fcid2str(fcid_str, fcid);
+			list_del(&itnim->list_entry);
+			bfa_log(bfad->logmod, BFA_LOG_LINUX_ITNIM_OFFLINE,
+				im_port->shost->host_no,
+				itnim->scsi_tgt_id,
+				fcid_str, wwpn_str);
+		}
+		break;
+	case ITNIM_STATE_FREE:
+		if (itnim->fc_rport) {
+			fc_rport = itnim->fc_rport;
+			((struct bfad_itnim_data_s *)
+				fc_rport->dd_data)->itnim = NULL;
+			itnim->fc_rport = NULL;
+			if (!(im_port->port->flags & BFAD_PORT_DELETE)) {
+				spin_unlock_irqrestore(&bfad->bfad_lock, flags);
+				fc_rport->dev_loss_tmo =
+					bfa_fcpim_path_tov_get(&bfad->bfa) + 1;
+				fc_remote_port_delete(fc_rport);
+				spin_lock_irqsave(&bfad->bfad_lock, flags);
+			}
+			list_del(&itnim->list_entry);
+		}
+
+		kfree(itnim);
+		break;
+	default:
+		bfa_assert(0);
+		break;
+	}
+
+	spin_unlock_irqrestore(&bfad->bfad_lock, flags);
+}
+
+/**
+ * Scsi_Host template entry, queue a SCSI command to the BFAD.
+ */
+static int
+bfad_im_queuecommand(struct scsi_cmnd *cmnd, void (*done) (struct scsi_cmnd *))
+{
+	struct bfad_im_port_s *im_port =
+		(struct bfad_im_port_s *) cmnd->device->host->hostdata[0];
+	struct bfad_s         *bfad = im_port->bfad;
+	struct bfad_itnim_data_s *itnim_data = cmnd->device->hostdata;
+	struct bfad_itnim_s   *itnim;
+	struct bfa_ioim_s *hal_io;
+	unsigned long   flags;
+	int             rc;
+	s16        sg_cnt = 0;
+	struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
+
+	rc = fc_remote_port_chkready(rport);
+	if (rc) {
+		cmnd->result = rc;
+		done(cmnd);
+		return 0;
+	}
+
+	sg_cnt = scsi_dma_map(cmnd);
+
+	if (sg_cnt < 0)
+		return SCSI_MLQUEUE_HOST_BUSY;
+
+	cmnd->scsi_done = done;
+
+	spin_lock_irqsave(&bfad->bfad_lock, flags);
+	if (!(bfad->bfad_flags & BFAD_HAL_START_DONE)) {
+		printk(KERN_WARNING
+			"bfad%d, queuecommand %p %x failed, BFA stopped\n",
+		       bfad->inst_no, cmnd, cmnd->cmnd[0]);
+		cmnd->result = ScsiResult(DID_NO_CONNECT, 0);
+		goto out_fail_cmd;
+	}
+
+	itnim = itnim_data->itnim;
+	if (!itnim) {
+		cmnd->result = ScsiResult(DID_IMM_RETRY, 0);
+		goto out_fail_cmd;
+	}
+
+	hal_io = bfa_ioim_alloc(&bfad->bfa, (struct bfad_ioim_s *) cmnd,
+				    itnim->bfa_itnim, sg_cnt);
+	if (!hal_io) {
+		printk(KERN_WARNING "hal_io failure\n");
+		spin_unlock_irqrestore(&bfad->bfad_lock, flags);
+		scsi_dma_unmap(cmnd);
+		return SCSI_MLQUEUE_HOST_BUSY;
+	}
+
+	cmnd->host_scribble = (char *)hal_io;
+	bfa_trc_fp(bfad, hal_io->iotag);
+	bfa_ioim_start(hal_io);
+	spin_unlock_irqrestore(&bfad->bfad_lock, flags);
+
+	return 0;
+
+out_fail_cmd:
+	spin_unlock_irqrestore(&bfad->bfad_lock, flags);
+	scsi_dma_unmap(cmnd);
+	if (done)
+		done(cmnd);
+
+	return 0;
+}
+
+void
+bfad_os_rport_online_wait(struct bfad_s *bfad)
+{
+	int i;
+	int rport_delay = 10;
+
+	for (i = 0; !(bfad->bfad_flags & BFAD_PORT_ONLINE)
+		 && i < bfa_linkup_delay; i++)
+		schedule_timeout_uninterruptible(HZ);
+
+	if (bfad->bfad_flags & BFAD_PORT_ONLINE) {
+		rport_delay = rport_delay < bfa_linkup_delay ?
+				 rport_delay : bfa_linkup_delay;
+		for (i = 0; !(bfad->bfad_flags & BFAD_RPORT_ONLINE)
+			 && i < rport_delay; i++)
+			schedule_timeout_uninterruptible(HZ);
+
+		if (rport_delay > 0 && (bfad->bfad_flags & BFAD_RPORT_ONLINE))
+			schedule_timeout_uninterruptible(rport_delay * HZ);
+	}
+}
+
+int
+bfad_os_get_linkup_delay(struct bfad_s *bfad)
+{
+
+	u8         nwwns = 0;
+	wwn_t           *wwns;
+	int             ldelay;
+
+	/*
+	 * Querying for the boot target port wwns
+	 * -- read from boot information in flash.
+	 * If nwwns > 0 => boot over SAN and set bfa_linkup_delay = 30
+	 * else => local boot machine set bfa_linkup_delay = 10
+	 */
+
+	bfa_iocfc_get_bootwwns(&bfad->bfa, &nwwns, &wwns);
+
+	if (nwwns > 0) {
+		/* If boot over SAN; linkup_delay = 30sec */
+		ldelay = 30;
+	} else {
+		/* If local boot; linkup_delay = 10sec */
+		ldelay = 0;
+	}
+
+	return ldelay;
+}
+
+