[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: NKrishna Gudipati <kgudipat@brocade.com>
Signed-off-by: NJames Bottomley <JBottomley@Parallels.com>

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

@@ -130,6 +130,7 @@ enum bfa_status {
 	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 */
@@ -138,11 +139,13 @@ enum bfa_status {
 	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

@@ -1369,6 +1369,45 @@ bfa_fcs_vf_lookup(struct bfa_fcs_s *fcs, u16 vf_id)
 	return NULL;
 }
 
+/*
+ *	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)
  */

drivers/scsi/bfa/bfa_fcs.h

@@ -731,6 +731,7 @@ void bfa_fcs_exit(struct bfa_fcs_s *fcs);
  * 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

@@ -583,6 +583,8 @@ struct fc_function_template bfad_im_fc_function_template = {
 	.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.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

@@ -43,6 +43,7 @@
 #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"
@@ -110,6 +111,7 @@ struct bfad_msix_s {
 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

@@ -778,6 +778,7 @@ struct scsi_host_template bfad_im_scsi_host_template = {
 	.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

@@ -141,4 +141,7 @@ extern struct device_attribute *bfad_im_vport_attrs[];
 
 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