[SCSI] bfa: Add BSG interface to support ELS, CT and vendor commands.

- Added BSG interface support to BFA driver
- Adds support to send ELS/CT FC passthru commands and
few vendor specific BSG requests.

Signed-off-by: Krishna Gudipati <[e-mail]>
Signed-off-by: James Bottomley <[e-mail]>

drivers/scsi/bfa/Makefile

···
 obj-$(CONFIG_SCSI_BFA_FC) := bfa.o
 
-bfa-y := bfad.o bfad_im.o bfad_attr.o bfad_debugfs.o
+bfa-y := bfad.o bfad_im.o bfad_attr.o bfad_debugfs.o bfad_bsg.o
 bfa-y += bfa_ioc.o bfa_ioc_cb.o bfa_ioc_ct.o bfa_hw_cb.o bfa_hw_ct.o
 bfa-y += bfa_fcs.o bfa_fcs_lport.o bfa_fcs_rport.o bfa_fcs_fcpim.o bfa_fcbuild.o
 bfa-y += bfa_port.o bfa_fcpim.o bfa_core.o bfa_svc.o

drivers/scsi/bfa/bfa_defs.h

···
 	BFA_STATUS_ETIMER	= 5,	/*  Timer expired - Retry, if persists,
 					 *  contact support */
 	BFA_STATUS_EPROTOCOL	= 6,	/*  Protocol error */
+	BFA_STATUS_UNKNOWN_VFID = 11,	/*  VF_ID not found */
 	BFA_STATUS_DEVBUSY	= 13,	/*  Device busy - Retry operation */
 	BFA_STATUS_UNKNOWN_LWWN = 18,	/*  LPORT PWWN not found */
 	BFA_STATUS_UNKNOWN_RWWN = 19,	/*  RPORT PWWN not found */
···
 	BFA_STATUS_UNSUPP_SPEED	= 23,	/*  Invalid Speed Check speed setting */
 	BFA_STATUS_INVLD_DFSZ	= 24,	/*  Invalid Max data field size */
 	BFA_STATUS_FABRIC_RJT	= 29,	/*  Reject from attached fabric */
+	BFA_STATUS_PORT_OFFLINE = 34,	/*  Port is not online */
 	BFA_STATUS_VPORT_WWN_BP	= 46,	/*  WWN is same as base port's WWN */
 	BFA_STATUS_NO_FCPIM_NEXUS = 52,	/* No FCP Nexus exists with the rport */
 	BFA_STATUS_IOC_FAILURE	= 56,	/* IOC failure - Retry, if persists
 					 * contact support */
 	BFA_STATUS_INVALID_WWN	= 57,	/*  Invalid WWN */
+	BFA_STATUS_VERSION_FAIL = 70, /* Application/Driver version mismatch */
 	BFA_STATUS_DIAG_BUSY	= 71,	/*  diag busy */
 	BFA_STATUS_ENOFSAVE	= 78,	/*  No saved firmware trace */
 	BFA_STATUS_IOC_DISABLED = 82,   /* IOC is already disabled */

drivers/scsi/bfa/bfa_fcs.c

···
 }
 
 /*
+ *	Return the list of local logical ports present in the given VF.
+ *
+ *	@param[in]	vf	vf for which logical ports are returned
+ *	@param[out]	lpwwn	returned logical port wwn list
+ *	@param[in,out]	nlports in:size of lpwwn list;
+ *				out:total elements present,
+ *				actual elements returned is limited by the size
+ */
+void
+bfa_fcs_vf_get_ports(bfa_fcs_vf_t *vf, wwn_t lpwwn[], int *nlports)
+{
+	struct list_head *qe;
+	struct bfa_fcs_vport_s *vport;
+	int	i = 0;
+	struct bfa_fcs_s	*fcs;
+
+	if (vf == NULL || lpwwn == NULL || *nlports == 0)
+		return;
+
+	fcs = vf->fcs;
+
+	bfa_trc(fcs, vf->vf_id);
+	bfa_trc(fcs, (uint32_t) *nlports);
+
+	lpwwn[i++] = vf->bport.port_cfg.pwwn;
+
+	list_for_each(qe, &vf->vport_q) {
+		if (i >= *nlports)
+			break;
+
+		vport = (struct bfa_fcs_vport_s *) qe;
+		lpwwn[i++] = vport->lport.port_cfg.pwwn;
+	}
+
+	bfa_trc(fcs, i);
+	*nlports = i;
+}
+
+/*
  * BFA FCS PPORT ( physical port)
  */
 static void

drivers/scsi/bfa/bfa_fcs.h

···
  * bfa fcs vf public functions
  */
 bfa_fcs_vf_t *bfa_fcs_vf_lookup(struct bfa_fcs_s *fcs, u16 vf_id);
+void bfa_fcs_vf_get_ports(bfa_fcs_vf_t *vf, wwn_t vpwwn[], int *nports);
 
 /*
  * fabric protected interface functions

drivers/scsi/bfa/bfad_attr.c

···
 	.vport_create = bfad_im_vport_create,
 	.vport_delete = bfad_im_vport_delete,
 	.vport_disable = bfad_im_vport_disable,
+	.bsg_request = bfad_im_bsg_request,
+	.bsg_timeout = bfad_im_bsg_timeout,
 };
 
 struct fc_function_template bfad_im_vport_fc_function_template = {

drivers/scsi/bfa/bfad_bsg.c

···
+/*
+ * Copyright (c) 2005-2010 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 <linux/uaccess.h>
+#include "bfad_drv.h"
+#include "bfad_im.h"
+#include "bfad_bsg.h"
+
+BFA_TRC_FILE(LDRV, BSG);
+
+/* bfad_im_bsg_get_kobject - increment the bfa refcnt */
+static void
+bfad_im_bsg_get_kobject(struct fc_bsg_job *job)
+{
+	struct Scsi_Host *shost = job->shost;
+	unsigned long flags;
+
+	spin_lock_irqsave(shost->host_lock, flags);
+	__module_get(shost->dma_dev->driver->owner);
+	spin_unlock_irqrestore(shost->host_lock, flags);
+}
+
+/* bfad_im_bsg_put_kobject - decrement the bfa refcnt */
+static void
+bfad_im_bsg_put_kobject(struct fc_bsg_job *job)
+{
+	struct Scsi_Host *shost = job->shost;
+	unsigned long flags;
+
+	spin_lock_irqsave(shost->host_lock, flags);
+	module_put(shost->dma_dev->driver->owner);
+	spin_unlock_irqrestore(shost->host_lock, flags);
+}
+
+static int
+bfad_iocmd_ioc_get_info(struct bfad_s *bfad, void *cmd)
+{
+	int	i;
+	struct bfa_bsg_ioc_info_s *iocmd = (struct bfa_bsg_ioc_info_s *)cmd;
+	struct bfad_im_port_s	*im_port;
+	struct bfa_port_attr_s	pattr;
+	unsigned long	flags;
+
+	spin_lock_irqsave(&bfad->bfad_lock, flags);
+	bfa_fcport_get_attr(&bfad->bfa, &pattr);
+	iocmd->nwwn = pattr.nwwn;
+	iocmd->pwwn = pattr.pwwn;
+	iocmd->ioc_type = bfa_get_type(&bfad->bfa);
+	iocmd->mac = bfa_get_mac(&bfad->bfa);
+	iocmd->factory_mac = bfa_get_mfg_mac(&bfad->bfa);
+	bfa_get_adapter_serial_num(&bfad->bfa, iocmd->serialnum);
+	iocmd->factorynwwn = pattr.factorynwwn;
+	iocmd->factorypwwn = pattr.factorypwwn;
+	im_port = bfad->pport.im_port;
+	iocmd->host = im_port->shost->host_no;
+	spin_unlock_irqrestore(&bfad->bfad_lock, flags);
+
+	strcpy(iocmd->name, bfad->adapter_name);
+	strcpy(iocmd->port_name, bfad->port_name);
+	strcpy(iocmd->hwpath, bfad->pci_name);
+
+	/* set adapter hw path */
+	strcpy(iocmd->adapter_hwpath, bfad->pci_name);
+	i = strlen(iocmd->adapter_hwpath) - 1;
+	while (iocmd->adapter_hwpath[i] != '.')
+		i--;
+	iocmd->adapter_hwpath[i] = '\0';
+	iocmd->status = BFA_STATUS_OK;
+	return 0;
+}
+
+static int
+bfad_iocmd_ioc_get_attr(struct bfad_s *bfad, void *cmd)
+{
+	struct bfa_bsg_ioc_attr_s *iocmd = (struct bfa_bsg_ioc_attr_s *)cmd;
+	unsigned long	flags;
+
+	spin_lock_irqsave(&bfad->bfad_lock, flags);
+	bfa_ioc_get_attr(&bfad->bfa.ioc, &iocmd->ioc_attr);
+	spin_unlock_irqrestore(&bfad->bfad_lock, flags);
+
+	/* fill in driver attr info */
+	strcpy(iocmd->ioc_attr.driver_attr.driver, BFAD_DRIVER_NAME);
+	strncpy(iocmd->ioc_attr.driver_attr.driver_ver,
+		BFAD_DRIVER_VERSION, BFA_VERSION_LEN);
+	strcpy(iocmd->ioc_attr.driver_attr.fw_ver,
+		iocmd->ioc_attr.adapter_attr.fw_ver);
+	strcpy(iocmd->ioc_attr.driver_attr.bios_ver,
+		iocmd->ioc_attr.adapter_attr.optrom_ver);
+
+	/* copy chip rev info first otherwise it will be overwritten */
+	memcpy(bfad->pci_attr.chip_rev, iocmd->ioc_attr.pci_attr.chip_rev,
+		sizeof(bfad->pci_attr.chip_rev));
+	memcpy(&iocmd->ioc_attr.pci_attr, &bfad->pci_attr,
+		sizeof(struct bfa_ioc_pci_attr_s));
+
+	iocmd->status = BFA_STATUS_OK;
+	return 0;
+}
+
+static int
+bfad_iocmd_port_get_attr(struct bfad_s *bfad, void *cmd)
+{
+	struct bfa_bsg_port_attr_s *iocmd = (struct bfa_bsg_port_attr_s *)cmd;
+	struct bfa_lport_attr_s	port_attr;
+	unsigned long	flags;
+
+	spin_lock_irqsave(&bfad->bfad_lock, flags);
+	bfa_fcport_get_attr(&bfad->bfa, &iocmd->attr);
+	bfa_fcs_lport_get_attr(&bfad->bfa_fcs.fabric.bport, &port_attr);
+	spin_unlock_irqrestore(&bfad->bfad_lock, flags);
+
+	if (iocmd->attr.topology != BFA_PORT_TOPOLOGY_NONE)
+		iocmd->attr.pid = port_attr.pid;
+	else
+		iocmd->attr.pid = 0;
+
+	iocmd->attr.port_type = port_attr.port_type;
+	iocmd->attr.loopback = port_attr.loopback;
+	iocmd->attr.authfail = port_attr.authfail;
+	strncpy(iocmd->attr.port_symname.symname,
+		port_attr.port_cfg.sym_name.symname,
+		sizeof(port_attr.port_cfg.sym_name.symname));
+
+	iocmd->status = BFA_STATUS_OK;
+	return 0;
+}
+
+static int
+bfad_iocmd_lport_get_attr(struct bfad_s *bfad, void *cmd)
+{
+	struct bfa_fcs_lport_s	*fcs_port;
+	struct bfa_bsg_lport_attr_s *iocmd = (struct bfa_bsg_lport_attr_s *)cmd;
+	unsigned long	flags;
+
+	spin_lock_irqsave(&bfad->bfad_lock, flags);
+	fcs_port = bfa_fcs_lookup_port(&bfad->bfa_fcs,
+				iocmd->vf_id, iocmd->pwwn);
+	if (fcs_port == NULL) {
+		spin_unlock_irqrestore(&bfad->bfad_lock, flags);
+		iocmd->status = BFA_STATUS_UNKNOWN_LWWN;
+		goto out;
+	}
+
+	bfa_fcs_lport_get_attr(fcs_port, &iocmd->port_attr);
+	spin_unlock_irqrestore(&bfad->bfad_lock, flags);
+	iocmd->status = BFA_STATUS_OK;
+out:
+	return 0;
+}
+
+static int
+bfad_iocmd_rport_get_addr(struct bfad_s *bfad, void *cmd)
+{
+	struct bfa_bsg_rport_scsi_addr_s *iocmd =
+			(struct bfa_bsg_rport_scsi_addr_s *)cmd;
+	struct bfa_fcs_lport_s	*fcs_port;
+	struct bfa_fcs_itnim_s	*fcs_itnim;
+	struct bfad_itnim_s	*drv_itnim;
+	unsigned long	flags;
+
+	spin_lock_irqsave(&bfad->bfad_lock, flags);
+	fcs_port = bfa_fcs_lookup_port(&bfad->bfa_fcs,
+				iocmd->vf_id, iocmd->pwwn);
+	if (fcs_port == NULL) {
+		bfa_trc(bfad, 0);
+		spin_unlock_irqrestore(&bfad->bfad_lock, flags);
+		iocmd->status = BFA_STATUS_UNKNOWN_LWWN;
+		goto out;
+	}
+
+	fcs_itnim = bfa_fcs_itnim_lookup(fcs_port, iocmd->rpwwn);
+	if (fcs_itnim == NULL) {
+		bfa_trc(bfad, 0);
+		spin_unlock_irqrestore(&bfad->bfad_lock, flags);
+		iocmd->status = BFA_STATUS_UNKNOWN_RWWN;
+		goto out;
+	}
+
+	drv_itnim = fcs_itnim->itnim_drv;
+
+	if (drv_itnim && drv_itnim->im_port)
+		iocmd->host = drv_itnim->im_port->shost->host_no;
+	else {
+		bfa_trc(bfad, 0);
+		spin_unlock_irqrestore(&bfad->bfad_lock, flags);
+		iocmd->status = BFA_STATUS_UNKNOWN_RWWN;
+		goto out;
+	}
+
+	iocmd->target = drv_itnim->scsi_tgt_id;
+	spin_unlock_irqrestore(&bfad->bfad_lock, flags);
+
+	iocmd->bus = 0;
+	iocmd->lun = 0;
+	iocmd->status = BFA_STATUS_OK;
+out:
+	return 0;
+}
+
+static int
+bfad_iocmd_fabric_get_lports(struct bfad_s *bfad, void *cmd,
+			unsigned int payload_len)
+{
+	struct bfa_bsg_fabric_get_lports_s *iocmd =
+			(struct bfa_bsg_fabric_get_lports_s *)cmd;
+	bfa_fcs_vf_t	*fcs_vf;
+	uint32_t	nports = iocmd->nports;
+	unsigned long	flags;
+	void	*iocmd_bufptr;
+
+	if (nports == 0) {
+		iocmd->status = BFA_STATUS_EINVAL;
+		goto out;
+	}
+
+	if (bfad_chk_iocmd_sz(payload_len,
+		sizeof(struct bfa_bsg_fabric_get_lports_s),
+		sizeof(wwn_t[iocmd->nports])) != BFA_STATUS_OK) {
+		iocmd->status = BFA_STATUS_VERSION_FAIL;
+		goto out;
+	}
+
+	iocmd_bufptr = (char *)iocmd +
+			sizeof(struct bfa_bsg_fabric_get_lports_s);
+
+	spin_lock_irqsave(&bfad->bfad_lock, flags);
+	fcs_vf = bfa_fcs_vf_lookup(&bfad->bfa_fcs, iocmd->vf_id);
+	if (fcs_vf == NULL) {
+		spin_unlock_irqrestore(&bfad->bfad_lock, flags);
+		iocmd->status = BFA_STATUS_UNKNOWN_VFID;
+		goto out;
+	}
+	bfa_fcs_vf_get_ports(fcs_vf, (wwn_t *)iocmd_bufptr, &nports);
+	spin_unlock_irqrestore(&bfad->bfad_lock, flags);
+
+	iocmd->nports = nports;
+	iocmd->status = BFA_STATUS_OK;
+out:
+	return 0;
+}
+
+static int
+bfad_iocmd_itnim_get_attr(struct bfad_s *bfad, void *cmd)
+{
+	struct bfa_bsg_itnim_attr_s *iocmd = (struct bfa_bsg_itnim_attr_s *)cmd;
+	struct bfa_fcs_lport_s	*fcs_port;
+	unsigned long	flags;
+
+	spin_lock_irqsave(&bfad->bfad_lock, flags);
+	fcs_port = bfa_fcs_lookup_port(&bfad->bfa_fcs,
+				iocmd->vf_id, iocmd->lpwwn);
+	if (!fcs_port)
+		iocmd->status = BFA_STATUS_UNKNOWN_LWWN;
+	else
+		iocmd->status = bfa_fcs_itnim_attr_get(fcs_port,
+					iocmd->rpwwn, &iocmd->attr);
+	spin_unlock_irqrestore(&bfad->bfad_lock, flags);
+	return 0;
+}
+
+static int
+bfad_iocmd_handler(struct bfad_s *bfad, unsigned int cmd, void *iocmd,
+		unsigned int payload_len)
+{
+	int rc = EINVAL;
+
+	switch (cmd) {
+	case IOCMD_IOC_GET_INFO:
+		rc = bfad_iocmd_ioc_get_info(bfad, iocmd);
+		break;
+	case IOCMD_IOC_GET_ATTR:
+		rc = bfad_iocmd_ioc_get_attr(bfad, iocmd);
+		break;
+	case IOCMD_PORT_GET_ATTR:
+		rc = bfad_iocmd_port_get_attr(bfad, iocmd);
+		break;
+	case IOCMD_LPORT_GET_ATTR:
+		rc = bfad_iocmd_lport_get_attr(bfad, iocmd);
+		break;
+	case IOCMD_RPORT_GET_ADDR:
+		rc = bfad_iocmd_rport_get_addr(bfad, iocmd);
+		break;
+	case IOCMD_FABRIC_GET_LPORTS:
+		rc = bfad_iocmd_fabric_get_lports(bfad, iocmd, payload_len);
+		break;
+	case IOCMD_ITNIM_GET_ATTR:
+		rc = bfad_iocmd_itnim_get_attr(bfad, iocmd);
+		break;
+	default:
+		rc = EINVAL;
+		break;
+	}
+	return -rc;
+}
+
+static int
+bfad_im_bsg_vendor_request(struct fc_bsg_job *job)
+{
+	uint32_t vendor_cmd = job->request->rqst_data.h_vendor.vendor_cmd[0];
+	struct bfad_im_port_s *im_port =
+			(struct bfad_im_port_s *) job->shost->hostdata[0];
+	struct bfad_s *bfad = im_port->bfad;
+	void *payload_kbuf;
+	int rc = -EINVAL;
+
+	/* Allocate a temp buffer to hold the passed in user space command */
+	payload_kbuf = kzalloc(job->request_payload.payload_len, GFP_KERNEL);
+	if (!payload_kbuf) {
+		rc = -ENOMEM;
+		goto out;
+	}
+
+	/* Copy the sg_list passed in to a linear buffer: holds the cmnd data */
+	sg_copy_to_buffer(job->request_payload.sg_list,
+			  job->request_payload.sg_cnt, payload_kbuf,
+			  job->request_payload.payload_len);
+
+	/* Invoke IOCMD handler - to handle all the vendor command requests */
+	rc = bfad_iocmd_handler(bfad, vendor_cmd, payload_kbuf,
+				job->request_payload.payload_len);
+	if (rc != BFA_STATUS_OK)
+		goto error;
+
+	/* Copy the response data to the job->reply_payload sg_list */
+	sg_copy_from_buffer(job->reply_payload.sg_list,
+			    job->reply_payload.sg_cnt,
+			    payload_kbuf,
+			    job->reply_payload.payload_len);
+
+	/* free the command buffer */
+	kfree(payload_kbuf);
+
+	/* Fill the BSG job reply data */
+	job->reply_len = job->reply_payload.payload_len;
+	job->reply->reply_payload_rcv_len = job->reply_payload.payload_len;
+	job->reply->result = rc;
+
+	job->job_done(job);
+	return rc;
+error:
+	/* free the command buffer */
+	kfree(payload_kbuf);
+out:
+	job->reply->result = rc;
+	job->reply_len = sizeof(uint32_t);
+	job->reply->reply_payload_rcv_len = 0;
+	return rc;
+}
+
+/* FC passthru call backs */
+u64
+bfad_fcxp_get_req_sgaddr_cb(void *bfad_fcxp, int sgeid)
+{
+	struct bfad_fcxp	*drv_fcxp = bfad_fcxp;
+	struct bfa_sge_s  *sge;
+	u64	addr;
+
+	sge = drv_fcxp->req_sge + sgeid;
+	addr = (u64)(size_t) sge->sg_addr;
+	return addr;
+}
+
+u32
+bfad_fcxp_get_req_sglen_cb(void *bfad_fcxp, int sgeid)
+{
+	struct bfad_fcxp	*drv_fcxp = bfad_fcxp;
+	struct bfa_sge_s	*sge;
+
+	sge = drv_fcxp->req_sge + sgeid;
+	return sge->sg_len;
+}
+
+u64
+bfad_fcxp_get_rsp_sgaddr_cb(void *bfad_fcxp, int sgeid)
+{
+	struct bfad_fcxp	*drv_fcxp = bfad_fcxp;
+	struct bfa_sge_s	*sge;
+	u64	addr;
+
+	sge = drv_fcxp->rsp_sge + sgeid;
+	addr = (u64)(size_t) sge->sg_addr;
+	return addr;
+}
+
+u32
+bfad_fcxp_get_rsp_sglen_cb(void *bfad_fcxp, int sgeid)
+{
+	struct bfad_fcxp	*drv_fcxp = bfad_fcxp;
+	struct bfa_sge_s	*sge;
+
+	sge = drv_fcxp->rsp_sge + sgeid;
+	return sge->sg_len;
+}
+
+void
+bfad_send_fcpt_cb(void *bfad_fcxp, struct bfa_fcxp_s *fcxp, void *cbarg,
+		bfa_status_t req_status, u32 rsp_len, u32 resid_len,
+		struct fchs_s *rsp_fchs)
+{
+	struct bfad_fcxp *drv_fcxp = bfad_fcxp;
+
+	drv_fcxp->req_status = req_status;
+	drv_fcxp->rsp_len = rsp_len;
+
+	/* bfa_fcxp will be automatically freed by BFA */
+	drv_fcxp->bfa_fcxp = NULL;
+	complete(&drv_fcxp->comp);
+}
+
+struct bfad_buf_info *
+bfad_fcxp_map_sg(struct bfad_s *bfad, void *payload_kbuf,
+		 uint32_t payload_len, uint32_t *num_sgles)
+{
+	struct bfad_buf_info	*buf_base, *buf_info;
+	struct bfa_sge_s	*sg_table;
+	int sge_num = 1;
+
+	buf_base = kzalloc((sizeof(struct bfad_buf_info) +
+			   sizeof(struct bfa_sge_s)) * sge_num, GFP_KERNEL);
+	if (!buf_base)
+		return NULL;
+
+	sg_table = (struct bfa_sge_s *) (((uint8_t *)buf_base) +
+			(sizeof(struct bfad_buf_info) * sge_num));
+
+	/* Allocate dma coherent memory */
+	buf_info = buf_base;
+	buf_info->size = payload_len;
+	buf_info->virt = dma_alloc_coherent(&bfad->pcidev->dev, buf_info->size,
+					&buf_info->phys, GFP_KERNEL);
+	if (!buf_info->virt)
+		goto out_free_mem;
+
+	/* copy the linear bsg buffer to buf_info */
+	memset(buf_info->virt, 0, buf_info->size);
+	memcpy(buf_info->virt, payload_kbuf, buf_info->size);
+
+	/*
+	 * Setup SG table
+	 */
+	sg_table->sg_len = buf_info->size;
+	sg_table->sg_addr = (void *)(size_t) buf_info->phys;
+
+	*num_sgles = sge_num;
+
+	return buf_base;
+
+out_free_mem:
+	kfree(buf_base);
+	return NULL;
+}
+
+void
+bfad_fcxp_free_mem(struct bfad_s *bfad, struct bfad_buf_info *buf_base,
+		   uint32_t num_sgles)
+{
+	int i;
+	struct bfad_buf_info *buf_info = buf_base;
+
+	if (buf_base) {
+		for (i = 0; i < num_sgles; buf_info++, i++) {
+			if (buf_info->virt != NULL)
+				dma_free_coherent(&bfad->pcidev->dev,
+					buf_info->size, buf_info->virt,
+					buf_info->phys);
+		}
+		kfree(buf_base);
+	}
+}
+
+int
+bfad_fcxp_bsg_send(struct fc_bsg_job *job, struct bfad_fcxp *drv_fcxp,
+		   bfa_bsg_fcpt_t *bsg_fcpt)
+{
+	struct bfa_fcxp_s *hal_fcxp;
+	struct bfad_s	*bfad = drv_fcxp->port->bfad;
+	unsigned long	flags;
+	uint8_t	lp_tag;
+
+	spin_lock_irqsave(&bfad->bfad_lock, flags);
+
+	/* Allocate bfa_fcxp structure */
+	hal_fcxp = bfa_fcxp_alloc(drv_fcxp, &bfad->bfa,
+				  drv_fcxp->num_req_sgles,
+				  drv_fcxp->num_rsp_sgles,
+				  bfad_fcxp_get_req_sgaddr_cb,
+				  bfad_fcxp_get_req_sglen_cb,
+				  bfad_fcxp_get_rsp_sgaddr_cb,
+				  bfad_fcxp_get_rsp_sglen_cb);
+	if (!hal_fcxp) {
+		bfa_trc(bfad, 0);
+		spin_unlock_irqrestore(&bfad->bfad_lock, flags);
+		return BFA_STATUS_ENOMEM;
+	}
+
+	drv_fcxp->bfa_fcxp = hal_fcxp;
+
+	lp_tag = bfa_lps_get_tag_from_pid(&bfad->bfa, bsg_fcpt->fchs.s_id);
+
+	bfa_fcxp_send(hal_fcxp, drv_fcxp->bfa_rport, bsg_fcpt->vf_id, lp_tag,
+		      bsg_fcpt->cts, bsg_fcpt->cos,
+		      job->request_payload.payload_len,
+		      &bsg_fcpt->fchs, bfad_send_fcpt_cb, bfad,
+		      job->reply_payload.payload_len, bsg_fcpt->tsecs);
+
+	spin_unlock_irqrestore(&bfad->bfad_lock, flags);
+
+	return BFA_STATUS_OK;
+}
+
+int
+bfad_im_bsg_els_ct_request(struct fc_bsg_job *job)
+{
+	struct bfa_bsg_data *bsg_data;
+	struct bfad_im_port_s *im_port =
+			(struct bfad_im_port_s *) job->shost->hostdata[0];
+	struct bfad_s *bfad = im_port->bfad;
+	bfa_bsg_fcpt_t *bsg_fcpt;
+	struct bfad_fcxp    *drv_fcxp;
+	struct bfa_fcs_lport_s *fcs_port;
+	struct bfa_fcs_rport_s *fcs_rport;
+	uint32_t command_type = job->request->msgcode;
+	unsigned long flags;
+	struct bfad_buf_info *rsp_buf_info;
+	void *req_kbuf = NULL, *rsp_kbuf = NULL;
+	int rc = -EINVAL;
+
+	job->reply_len  = sizeof(uint32_t);	/* Atleast uint32_t reply_len */
+	job->reply->reply_payload_rcv_len = 0;
+
+	/* Get the payload passed in from userspace */
+	bsg_data = (struct bfa_bsg_data *) (((char *)job->request) +
+					sizeof(struct fc_bsg_request));
+	if (bsg_data == NULL)
+		goto out;
+
+	/*
+	 * Allocate buffer for bsg_fcpt and do a copy_from_user op for payload
+	 * buffer of size bsg_data->payload_len
+	 */
+	bsg_fcpt = (struct bfa_bsg_fcpt_s *)
+		   kzalloc(bsg_data->payload_len, GFP_KERNEL);
+	if (!bsg_fcpt)
+		goto out;
+
+	if (copy_from_user((uint8_t *)bsg_fcpt, bsg_data->payload,
+				bsg_data->payload_len)) {
+		kfree(bsg_fcpt);
+		goto out;
+	}
+
+	drv_fcxp = kzalloc(sizeof(struct bfad_fcxp), GFP_KERNEL);
+	if (drv_fcxp == NULL) {
+		rc = -ENOMEM;
+		goto out;
+	}
+
+	spin_lock_irqsave(&bfad->bfad_lock, flags);
+	fcs_port = bfa_fcs_lookup_port(&bfad->bfa_fcs, bsg_fcpt->vf_id,
+					bsg_fcpt->lpwwn);
+	if (fcs_port == NULL) {
+		bsg_fcpt->status = BFA_STATUS_UNKNOWN_LWWN;
+		spin_unlock_irqrestore(&bfad->bfad_lock, flags);
+		goto out_free_mem;
+	}
+
+	/* Check if the port is online before sending FC Passthru cmd */
+	if (!bfa_fcs_lport_is_online(fcs_port)) {
+		bsg_fcpt->status = BFA_STATUS_PORT_OFFLINE;
+		spin_unlock_irqrestore(&bfad->bfad_lock, flags);
+		goto out_free_mem;
+	}
+
+	drv_fcxp->port = fcs_port->bfad_port;
+
+	if (drv_fcxp->port->bfad == 0)
+		drv_fcxp->port->bfad = bfad;
+
+	/* Fetch the bfa_rport - if nexus needed */
+	if (command_type == FC_BSG_HST_ELS_NOLOGIN ||
+	    command_type == FC_BSG_HST_CT) {
+		/* BSG HST commands: no nexus needed */
+		drv_fcxp->bfa_rport = NULL;
+
+	} else if (command_type == FC_BSG_RPT_ELS ||
+		   command_type == FC_BSG_RPT_CT) {
+		/* BSG RPT commands: nexus needed */
+		fcs_rport = bfa_fcs_lport_get_rport_by_pwwn(fcs_port,
+							    bsg_fcpt->dpwwn);
+		if (fcs_rport == NULL) {
+			bsg_fcpt->status = BFA_STATUS_UNKNOWN_RWWN;
+			spin_unlock_irqrestore(&bfad->bfad_lock, flags);
+			goto out_free_mem;
+		}
+
+		drv_fcxp->bfa_rport = fcs_rport->bfa_rport;
+
+	} else { /* Unknown BSG msgcode; return -EINVAL */
+		spin_unlock_irqrestore(&bfad->bfad_lock, flags);
+		goto out_free_mem;
+	}
+
+	spin_unlock_irqrestore(&bfad->bfad_lock, flags);
+
+	/* allocate memory for req / rsp buffers */
+	req_kbuf = kzalloc(job->request_payload.payload_len, GFP_KERNEL);
+	if (!req_kbuf) {
+		printk(KERN_INFO "bfa %s: fcpt request buffer alloc failed\n",
+				bfad->pci_name);
+		rc = -ENOMEM;
+		goto out_free_mem;
+	}
+
+	rsp_kbuf = kzalloc(job->reply_payload.payload_len, GFP_KERNEL);
+	if (!rsp_kbuf) {
+		printk(KERN_INFO "bfa %s: fcpt response buffer alloc failed\n",
+				bfad->pci_name);
+		rc = -ENOMEM;
+		goto out_free_mem;
+	}
+
+	/* map req sg - copy the sg_list passed in to the linear buffer */
+	sg_copy_to_buffer(job->request_payload.sg_list,
+			  job->request_payload.sg_cnt, req_kbuf,
+			  job->request_payload.payload_len);
+
+	drv_fcxp->reqbuf_info = bfad_fcxp_map_sg(bfad, req_kbuf,
+					job->request_payload.payload_len,
+					&drv_fcxp->num_req_sgles);
+	if (!drv_fcxp->reqbuf_info) {
+		printk(KERN_INFO "bfa %s: fcpt request fcxp_map_sg failed\n",
+				bfad->pci_name);
+		rc = -ENOMEM;
+		goto out_free_mem;
+	}
+
+	drv_fcxp->req_sge = (struct bfa_sge_s *)
+			    (((uint8_t *)drv_fcxp->reqbuf_info) +
+			    (sizeof(struct bfad_buf_info) *
+					drv_fcxp->num_req_sgles));
+
+	/* map rsp sg */
+	drv_fcxp->rspbuf_info = bfad_fcxp_map_sg(bfad, rsp_kbuf,
+					job->reply_payload.payload_len,
+					&drv_fcxp->num_rsp_sgles);
+	if (!drv_fcxp->rspbuf_info) {
+		printk(KERN_INFO "bfa %s: fcpt response fcxp_map_sg failed\n",
+				bfad->pci_name);
+		rc = -ENOMEM;
+		goto out_free_mem;
+	}
+
+	rsp_buf_info = (struct bfad_buf_info *)drv_fcxp->rspbuf_info;
+	drv_fcxp->rsp_sge = (struct bfa_sge_s  *)
+			    (((uint8_t *)drv_fcxp->rspbuf_info) +
+			    (sizeof(struct bfad_buf_info) *
+					drv_fcxp->num_rsp_sgles));
+
+	/* fcxp send */
+	init_completion(&drv_fcxp->comp);
+	rc = bfad_fcxp_bsg_send(job, drv_fcxp, bsg_fcpt);
+	if (rc == BFA_STATUS_OK) {
+		wait_for_completion(&drv_fcxp->comp);
+		bsg_fcpt->status = drv_fcxp->req_status;
+	} else {
+		bsg_fcpt->status = rc;
+		goto out_free_mem;
+	}
+
+	/* fill the job->reply data */
+	if (drv_fcxp->req_status == BFA_STATUS_OK) {
+		job->reply_len = drv_fcxp->rsp_len;
+		job->reply->reply_payload_rcv_len = drv_fcxp->rsp_len;
+		job->reply->reply_data.ctels_reply.status = FC_CTELS_STATUS_OK;
+	} else {
+		job->reply->reply_payload_rcv_len =
+					sizeof(struct fc_bsg_ctels_reply);
+		job->reply_len = sizeof(uint32_t);
+		job->reply->reply_data.ctels_reply.status =
+						FC_CTELS_STATUS_REJECT;
+	}
+
+	/* Copy the response data to the reply_payload sg list */
+	sg_copy_from_buffer(job->reply_payload.sg_list,
+			    job->reply_payload.sg_cnt,
+			    (uint8_t *)rsp_buf_info->virt,
+			    job->reply_payload.payload_len);
+
+out_free_mem:
+	bfad_fcxp_free_mem(bfad, drv_fcxp->rspbuf_info,
+			   drv_fcxp->num_rsp_sgles);
+	bfad_fcxp_free_mem(bfad, drv_fcxp->reqbuf_info,
+			   drv_fcxp->num_req_sgles);
+	kfree(req_kbuf);
+	kfree(rsp_kbuf);
+
+	/* Need a copy to user op */
+	if (copy_to_user(bsg_data->payload, (void *) bsg_fcpt,
+			 bsg_data->payload_len))
+		rc = -EIO;
+
+	kfree(bsg_fcpt);
+	kfree(drv_fcxp);
+out:
+	job->reply->result = rc;
+
+	if (rc == BFA_STATUS_OK)
+		job->job_done(job);
+
+	return rc;
+}
+
+int
+bfad_im_bsg_request(struct fc_bsg_job *job)
+{
+	uint32_t rc = BFA_STATUS_OK;
+
+	/* Increment the bfa module refcnt - if bsg request is in service */
+	bfad_im_bsg_get_kobject(job);
+
+	switch (job->request->msgcode) {
+	case FC_BSG_HST_VENDOR:
+		/* Process BSG HST Vendor requests */
+		rc = bfad_im_bsg_vendor_request(job);
+		break;
+	case FC_BSG_HST_ELS_NOLOGIN:
+	case FC_BSG_RPT_ELS:
+	case FC_BSG_HST_CT:
+	case FC_BSG_RPT_CT:
+		/* Process BSG ELS/CT commands */
+		rc = bfad_im_bsg_els_ct_request(job);
+		break;
+	default:
+		job->reply->result = rc = -EINVAL;
+		job->reply->reply_payload_rcv_len = 0;
+		break;
+	}
+
+	/* Decrement the bfa module refcnt - on completion of bsg request */
+	bfad_im_bsg_put_kobject(job);
+
+	return rc;
+}
+
+int
+bfad_im_bsg_timeout(struct fc_bsg_job *job)
+{
+	/* Don't complete the BSG job request - return -EAGAIN
+	 * to reset bsg job timeout : for ELS/CT pass thru we
+	 * already have timer to track the request.
+	 */
+	return -EAGAIN;
+}

drivers/scsi/bfa/bfad_bsg.h

···
+/*
+ * Copyright (c) 2005-2010 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.
+ */
+#ifndef BFAD_BSG_H
+#define BFAD_BSG_H
+
+#include "bfa_defs.h"
+#include "bfa_defs_fcs.h"
+
+/* Definitions of vendor unique structures and command codes passed in
+ * using FC_BSG_HST_VENDOR message code.
+ */
+enum {
+	IOCMD_IOC_GET_ATTR = 0x1,
+	IOCMD_IOC_GET_INFO,
+	IOCMD_PORT_GET_ATTR,
+	IOCMD_LPORT_GET_ATTR,
+	IOCMD_RPORT_GET_ADDR,
+	IOCMD_FABRIC_GET_LPORTS,
+	IOCMD_ITNIM_GET_ATTR,
+};
+
+struct bfa_bsg_ioc_info_s {
+	bfa_status_t	status;
+	u16		bfad_num;
+	u16		rsvd;
+	char		serialnum[64];
+	char		hwpath[BFA_STRING_32];
+	char		adapter_hwpath[BFA_STRING_32];
+	char		guid[BFA_ADAPTER_SYM_NAME_LEN*2];
+	char		name[BFA_ADAPTER_SYM_NAME_LEN];
+	char		port_name[BFA_ADAPTER_SYM_NAME_LEN];
+	char		eth_name[BFA_ADAPTER_SYM_NAME_LEN];
+	wwn_t		pwwn;
+	wwn_t		nwwn;
+	wwn_t		factorypwwn;
+	wwn_t		factorynwwn;
+	mac_t		mac;
+	mac_t		factory_mac; /* Factory mac address */
+	mac_t		current_mac; /* Currently assigned mac address */
+	enum bfa_ioc_type_e	ioc_type;
+	u16		pvid; /* Port vlan id */
+	u16		rsvd1;
+	u32		host;
+	u32		bandwidth; /* For PF support */
+	u32		rsvd2;
+};
+
+struct bfa_bsg_ioc_attr_s {
+	bfa_status_t	status;
+	u16		bfad_num;
+	u16		rsvd;
+	struct bfa_ioc_attr_s  ioc_attr;
+};
+
+struct bfa_bsg_port_attr_s {
+	bfa_status_t	status;
+	u16		bfad_num;
+	u16		rsvd;
+	struct bfa_port_attr_s	attr;
+};
+
+struct bfa_bsg_lport_attr_s {
+	bfa_status_t	status;
+	u16		bfad_num;
+	u16		vf_id;
+	wwn_t		pwwn;
+	struct bfa_lport_attr_s port_attr;
+};
+
+struct bfa_bsg_rport_scsi_addr_s {
+	bfa_status_t	status;
+	u16		bfad_num;
+	u16		vf_id;
+	wwn_t		pwwn;
+	wwn_t		rpwwn;
+	u32		host;
+	u32		bus;
+	u32		target;
+	u32		lun;
+};
+
+struct bfa_bsg_fabric_get_lports_s {
+	bfa_status_t	status;
+	u16		bfad_num;
+	u16		vf_id;
+	u64		buf_ptr;
+	u32		nports;
+	u32		rsvd;
+};
+
+struct bfa_bsg_itnim_attr_s {
+	bfa_status_t	status;
+	u16		bfad_num;
+	u16		vf_id;
+	wwn_t		lpwwn;
+	wwn_t		rpwwn;
+	struct bfa_itnim_attr_s	attr;
+};
+
+struct bfa_bsg_fcpt_s {
+	bfa_status_t    status;
+	u16		vf_id;
+	wwn_t		lpwwn;
+	wwn_t		dpwwn;
+	u32		tsecs;
+	int		cts;
+	enum fc_cos	cos;
+	struct fchs_s	fchs;
+};
+#define bfa_bsg_fcpt_t struct bfa_bsg_fcpt_s
+
+struct bfa_bsg_data {
+	int payload_len;
+	void *payload;
+};
+
+#define bfad_chk_iocmd_sz(__payload_len, __hdrsz, __bufsz)	\
+	(((__payload_len) != ((__hdrsz) + (__bufsz))) ?		\
+	 BFA_STATUS_FAILED : BFA_STATUS_OK)
+
+#endif /* BFAD_BSG_H */

drivers/scsi/bfa/bfad_drv.h

···
 #include <scsi/scsi_tcq.h>
 #include <scsi/scsi_transport_fc.h>
 #include <scsi/scsi_transport.h>
+#include <scsi/scsi_bsg_fc.h>
 
 #include "bfa_modules.h"
 #include "bfa_fcs.h"
···
 enum {
 	BFA_TRC_LDRV_BFAD		= 1,
 	BFA_TRC_LDRV_IM			= 2,
+	BFA_TRC_LDRV_BSG		= 3,
 };
 
 enum bfad_port_pvb_type {

drivers/scsi/bfa/bfad_im.c

···
 	.use_clustering = ENABLE_CLUSTERING,
 	.shost_attrs = bfad_im_host_attrs,
 	.max_sectors = 0xFFFF,
+	.vendor_id = BFA_PCI_VENDOR_ID_BROCADE,
 };
 
 struct scsi_host_template bfad_im_vport_template = {

drivers/scsi/bfa/bfad_im.h

···
 
 irqreturn_t bfad_intx(int irq, void *dev_id);
 
+int bfad_im_bsg_request(struct fc_bsg_job *job);
+int bfad_im_bsg_timeout(struct fc_bsg_job *job);
+
 #endif