Adding upstream version 6.1.76.upstream/6.1.76

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 882 insertions, 0 deletions

diff --git a/include/scsi/scsi_transport_fc.h b/include/scsi/scsi_transport_fc.h
new file mode 100644
index 000000000..e80a7c542
--- /dev/null
+++ b/include/scsi/scsi_transport_fc.h
@@ -0,0 +1,882 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ *  FiberChannel transport specific attributes exported to sysfs.
+ *
+ *  Copyright (c) 2003 Silicon Graphics, Inc.  All rights reserved.
+ *  Copyright (C) 2004-2007   James Smart, Emulex Corporation
+ *    Rewrite for host, target, device, and remote port attributes,
+ *    statistics, and service functions...
+ */
+#ifndef SCSI_TRANSPORT_FC_H
+#define SCSI_TRANSPORT_FC_H
+
+#include <linux/sched.h>
+#include <linux/bsg-lib.h>
+#include <asm/unaligned.h>
+#include <scsi/scsi.h>
+#include <scsi/scsi_netlink.h>
+#include <scsi/scsi_host.h>
+
+struct scsi_transport_template;
+
+/*
+ * FC Port definitions - Following FC HBAAPI guidelines
+ *
+ * Note: Not all binary values for the different fields match HBAAPI.
+ *  Instead, we use densely packed ordinal values or enums.
+ *  We get away with this as we never present the actual binary values
+ *  externally. For sysfs, we always present the string that describes
+ *  the value. Thus, an admin doesn't need a magic HBAAPI decoder ring
+ *  to understand the values. The HBAAPI user-space library is free to
+ *  convert the strings into the HBAAPI-specified binary values.
+ *
+ * Note: Not all HBAAPI-defined values are contained in the definitions
+ *  below. Those not appropriate to an fc_host (e.g. FCP initiator) have
+ *  been removed.
+ */
+
+/*
+ * fc_port_type: If you alter this, you also need to alter scsi_transport_fc.c
+ * (for the ascii descriptions).
+ */
+enum fc_port_type {
+	FC_PORTTYPE_UNKNOWN,
+	FC_PORTTYPE_OTHER,
+	FC_PORTTYPE_NOTPRESENT,
+	FC_PORTTYPE_NPORT,		/* Attached to FPort */
+	FC_PORTTYPE_NLPORT,		/* (Public) Loop w/ FLPort */
+	FC_PORTTYPE_LPORT,		/* (Private) Loop w/o FLPort */
+	FC_PORTTYPE_PTP,		/* Point to Point w/ another NPort */
+	FC_PORTTYPE_NPIV,		/* VPORT based on NPIV */
+};
+
+
+/*
+ * fc_port_state: If you alter this, you also need to alter scsi_transport_fc.c
+ * (for the ascii descriptions).
+ */
+enum fc_port_state {
+	FC_PORTSTATE_UNKNOWN,
+	FC_PORTSTATE_NOTPRESENT,
+	FC_PORTSTATE_ONLINE,
+	FC_PORTSTATE_OFFLINE,		/* User has taken Port Offline */
+	FC_PORTSTATE_BLOCKED,
+	FC_PORTSTATE_BYPASSED,
+	FC_PORTSTATE_DIAGNOSTICS,
+	FC_PORTSTATE_LINKDOWN,
+	FC_PORTSTATE_ERROR,
+	FC_PORTSTATE_LOOPBACK,
+	FC_PORTSTATE_DELETED,
+	FC_PORTSTATE_MARGINAL,
+};
+
+
+/*
+ * fc_vport_state: If you alter this, you also need to alter
+ * scsi_transport_fc.c (for the ascii descriptions).
+ */
+enum fc_vport_state {
+	FC_VPORT_UNKNOWN,
+	FC_VPORT_ACTIVE,
+	FC_VPORT_DISABLED,
+	FC_VPORT_LINKDOWN,
+	FC_VPORT_INITIALIZING,
+	FC_VPORT_NO_FABRIC_SUPP,
+	FC_VPORT_NO_FABRIC_RSCS,
+	FC_VPORT_FABRIC_LOGOUT,
+	FC_VPORT_FABRIC_REJ_WWN,
+	FC_VPORT_FAILED,
+};
+
+
+
+/*
+ * FC Classes of Service
+ * Note: values are not enumerated, as they can be "or'd" together
+ * for reporting (e.g. report supported_classes). If you alter this list,
+ * you also need to alter scsi_transport_fc.c (for the ascii descriptions).
+ */
+#define FC_COS_UNSPECIFIED		0
+#define FC_COS_CLASS1			2
+#define FC_COS_CLASS2			4
+#define FC_COS_CLASS3			8
+#define FC_COS_CLASS4			0x10
+#define FC_COS_CLASS6			0x40
+
+/*
+ * FC Port Speeds
+ * Note: values are not enumerated, as they can be "or'd" together
+ * for reporting (e.g. report supported_speeds). If you alter this list,
+ * you also need to alter scsi_transport_fc.c (for the ascii descriptions).
+ */
+#define FC_PORTSPEED_UNKNOWN		0 /* Unknown - transceiver
+					     incapable of reporting */
+#define FC_PORTSPEED_1GBIT		1
+#define FC_PORTSPEED_2GBIT		2
+#define FC_PORTSPEED_10GBIT		4
+#define FC_PORTSPEED_4GBIT		8
+#define FC_PORTSPEED_8GBIT		0x10
+#define FC_PORTSPEED_16GBIT		0x20
+#define FC_PORTSPEED_32GBIT		0x40
+#define FC_PORTSPEED_20GBIT		0x80
+#define FC_PORTSPEED_40GBIT		0x100
+#define FC_PORTSPEED_50GBIT		0x200
+#define FC_PORTSPEED_100GBIT		0x400
+#define FC_PORTSPEED_25GBIT		0x800
+#define FC_PORTSPEED_64GBIT		0x1000
+#define FC_PORTSPEED_128GBIT		0x2000
+#define FC_PORTSPEED_256GBIT		0x4000
+#define FC_PORTSPEED_NOT_NEGOTIATED	(1 << 15) /* Speed not established */
+
+/*
+ * fc_tgtid_binding_type: If you alter this, you also need to alter
+ * scsi_transport_fc.c (for the ascii descriptions).
+ */
+enum fc_tgtid_binding_type  {
+	FC_TGTID_BIND_NONE,
+	FC_TGTID_BIND_BY_WWPN,
+	FC_TGTID_BIND_BY_WWNN,
+	FC_TGTID_BIND_BY_ID,
+};
+
+/*
+ * FC Port Roles
+ * Note: values are not enumerated, as they can be "or'd" together
+ * for reporting (e.g. report roles). If you alter this list,
+ * you also need to alter scsi_transport_fc.c (for the ascii descriptions).
+ */
+#define FC_PORT_ROLE_UNKNOWN			0x00
+#define FC_PORT_ROLE_FCP_TARGET			0x01
+#define FC_PORT_ROLE_FCP_INITIATOR		0x02
+#define FC_PORT_ROLE_IP_PORT			0x04
+#define FC_PORT_ROLE_FCP_DUMMY_INITIATOR	0x08
+#define FC_PORT_ROLE_NVME_INITIATOR		0x10
+#define FC_PORT_ROLE_NVME_TARGET		0x20
+#define FC_PORT_ROLE_NVME_DISCOVERY		0x40
+
+/* The following are for compatibility */
+#define FC_RPORT_ROLE_UNKNOWN			FC_PORT_ROLE_UNKNOWN
+#define FC_RPORT_ROLE_FCP_TARGET		FC_PORT_ROLE_FCP_TARGET
+#define FC_RPORT_ROLE_FCP_INITIATOR		FC_PORT_ROLE_FCP_INITIATOR
+#define FC_RPORT_ROLE_IP_PORT			FC_PORT_ROLE_IP_PORT
+
+
+/* Macro for use in defining Virtual Port attributes */
+#define FC_VPORT_ATTR(_name,_mode,_show,_store)		\
+struct device_attribute dev_attr_vport_##_name = 	\
+	__ATTR(_name,_mode,_show,_store)
+
+/*
+ * fc_vport_identifiers: This set of data contains all elements
+ * to uniquely identify and instantiate a FC virtual port.
+ *
+ * Notes:
+ *   symbolic_name: The driver is to append the symbolic_name string data
+ *      to the symbolic_node_name data that it generates by default.
+ *      the resulting combination should then be registered with the switch.
+ *      It is expected that things like Xen may stuff a VM title into
+ *      this field.
+ */
+#define FC_VPORT_SYMBOLIC_NAMELEN		64
+struct fc_vport_identifiers {
+	u64 node_name;
+	u64 port_name;
+	u32 roles;
+	bool disable;
+	enum fc_port_type vport_type;	/* only FC_PORTTYPE_NPIV allowed */
+	char symbolic_name[FC_VPORT_SYMBOLIC_NAMELEN];
+};
+
+/*
+ * FC Virtual Port Attributes
+ *
+ * This structure exists for each FC port is a virtual FC port. Virtual
+ * ports share the physical link with the Physical port. Each virtual
+ * ports has a unique presence on the SAN, and may be instantiated via
+ * NPIV, Virtual Fabrics, or via additional ALPAs. As the vport is a
+ * unique presence, each vport has it's own view of the fabric,
+ * authentication privilege, and priorities.
+ *
+ * A virtual port may support 1 or more FC4 roles. Typically it is a
+ * FCP Initiator. It could be a FCP Target, or exist sole for an IP over FC
+ * roles. FC port attributes for the vport will be reported on any
+ * fc_host class object allocated for an FCP Initiator.
+ *
+ * --
+ *
+ * Fixed attributes are not expected to change. The driver is
+ * expected to set these values after receiving the fc_vport structure
+ * via the vport_create() call from the transport.
+ * The transport fully manages all get functions w/o driver interaction.
+ *
+ * Dynamic attributes are expected to change. The driver participates
+ * in all get/set operations via functions provided by the driver.
+ *
+ * Private attributes are transport-managed values. They are fully
+ * managed by the transport w/o driver interaction.
+ */
+
+struct fc_vport {
+	/* Fixed Attributes */
+
+	/* Dynamic Attributes */
+
+	/* Private (Transport-managed) Attributes */
+	enum fc_vport_state vport_state;
+	enum fc_vport_state vport_last_state;
+	u64 node_name;
+	u64 port_name;
+	u32 roles;
+	u32 vport_id;		/* Admin Identifier for the vport */
+	enum fc_port_type vport_type;
+	char symbolic_name[FC_VPORT_SYMBOLIC_NAMELEN];
+
+	/* exported data */
+	void *dd_data;			/* Used for driver-specific storage */
+
+	/* internal data */
+	struct Scsi_Host *shost;	/* Physical Port Parent */
+	unsigned int channel;
+	u32 number;
+	u8 flags;
+	struct list_head peers;
+	struct device dev;
+	struct work_struct vport_delete_work;
+} __attribute__((aligned(sizeof(unsigned long))));
+
+/* bit field values for struct fc_vport "flags" field: */
+#define FC_VPORT_CREATING		0x01
+#define FC_VPORT_DELETING		0x02
+#define FC_VPORT_DELETED		0x04
+#define FC_VPORT_DEL			0x06	/* Any DELETE state */
+
+#define	dev_to_vport(d)				\
+	container_of(d, struct fc_vport, dev)
+#define transport_class_to_vport(dev)		\
+	dev_to_vport(dev->parent)
+#define vport_to_shost(v)			\
+	(v->shost)
+#define vport_to_shost_channel(v)		\
+	(v->channel)
+#define vport_to_parent(v)			\
+	(v->dev.parent)
+
+
+/* Error return codes for vport_create() callback */
+#define VPCERR_UNSUPPORTED		-ENOSYS		/* no driver/adapter
+							   support */
+#define VPCERR_BAD_WWN			-ENOTUNIQ	/* driver validation
+							   of WWNs failed */
+#define VPCERR_NO_FABRIC_SUPP		-EOPNOTSUPP	/* Fabric connection
+							   is loop or the
+							   Fabric Port does
+							   not support NPIV */
+
+/*
+ * fc_rport_identifiers: This set of data contains all elements
+ * to uniquely identify a remote FC port. The driver uses this data
+ * to report the existence of a remote FC port in the topology. Internally,
+ * the transport uses this data for attributes and to manage consistent
+ * target id bindings.
+ */
+struct fc_rport_identifiers {
+	u64 node_name;
+	u64 port_name;
+	u32 port_id;
+	u32 roles;
+};
+
+/*
+ * Fabric Performance Impact Notification Statistics
+ */
+struct fc_fpin_stats {
+	/* Delivery */
+	u64 dn;
+	u64 dn_unknown;
+	u64 dn_timeout;
+	u64 dn_unable_to_route;
+	u64 dn_device_specific;
+
+	/* Link Integrity */
+	u64 li;
+	u64 li_failure_unknown;
+	u64 li_link_failure_count;
+	u64 li_loss_of_sync_count;
+	u64 li_loss_of_signals_count;
+	u64 li_prim_seq_err_count;
+	u64 li_invalid_tx_word_count;
+	u64 li_invalid_crc_count;
+	u64 li_device_specific;
+
+	/* Congestion/Peer Congestion */
+	u64 cn;
+	u64 cn_clear;
+	u64 cn_lost_credit;
+	u64 cn_credit_stall;
+	u64 cn_oversubscription;
+	u64 cn_device_specific;
+};
+
+/* Macro for use in defining Remote Port attributes */
+#define FC_RPORT_ATTR(_name,_mode,_show,_store)				\
+struct device_attribute dev_attr_rport_##_name = 	\
+	__ATTR(_name,_mode,_show,_store)
+
+
+/*
+ * FC Remote Port Attributes
+ *
+ * This structure exists for each remote FC port that a LLDD notifies
+ * the subsystem of.  A remote FC port may or may not be a SCSI Target,
+ * also be a SCSI initiator, IP endpoint, etc. As such, the remote
+ * port is considered a separate entity, independent of "role" (such
+ * as scsi target).
+ *
+ * --
+ *
+ * Attributes are based on HBAAPI V2.0 definitions. Only those
+ * attributes that are determinable by the local port (aka Host)
+ * are contained.
+ *
+ * Fixed attributes are not expected to change. The driver is
+ * expected to set these values after successfully calling
+ * fc_remote_port_add(). The transport fully manages all get functions
+ * w/o driver interaction.
+ *
+ * Dynamic attributes are expected to change. The driver participates
+ * in all get/set operations via functions provided by the driver.
+ *
+ * Private attributes are transport-managed values. They are fully
+ * managed by the transport w/o driver interaction.
+ */
+
+struct fc_rport {	/* aka fc_starget_attrs */
+	/* Fixed Attributes */
+	u32 maxframe_size;
+	u32 supported_classes;
+
+	/* Dynamic Attributes */
+	u32 dev_loss_tmo;	/* Remote Port loss timeout in seconds. */
+	struct fc_fpin_stats fpin_stats;
+
+	/* Private (Transport-managed) Attributes */
+	u64 node_name;
+	u64 port_name;
+	u32 port_id;
+	u32 roles;
+	enum fc_port_state port_state;	/* Will only be ONLINE or UNKNOWN */
+	u32 scsi_target_id;
+	u32 fast_io_fail_tmo;
+
+	/* exported data */
+	void *dd_data;			/* Used for driver-specific storage */
+
+	/* internal data */
+	unsigned int channel;
+	u32 number;
+	u8 flags;
+	struct list_head peers;
+	struct device dev;
+ 	struct delayed_work dev_loss_work;
+ 	struct work_struct scan_work;
+ 	struct delayed_work fail_io_work;
+ 	struct work_struct stgt_delete_work;
+	struct work_struct rport_delete_work;
+	struct request_queue *rqst_q;	/* bsg support */
+} __attribute__((aligned(sizeof(unsigned long))));
+
+/* bit field values for struct fc_rport "flags" field: */
+#define FC_RPORT_DEVLOSS_PENDING	0x01
+#define FC_RPORT_SCAN_PENDING		0x02
+#define FC_RPORT_FAST_FAIL_TIMEDOUT	0x04
+#define FC_RPORT_DEVLOSS_CALLBK_DONE	0x08
+
+#define	dev_to_rport(d)				\
+	container_of(d, struct fc_rport, dev)
+#define transport_class_to_rport(dev)	\
+	dev_to_rport(dev->parent)
+#define rport_to_shost(r)			\
+	dev_to_shost(r->dev.parent)
+
+/*
+ * FC SCSI Target Attributes
+ *
+ * The SCSI Target is considered an extension of a remote port (as
+ * a remote port can be more than a SCSI Target). Within the scsi
+ * subsystem, we leave the Target as a separate entity. Doing so
+ * provides backward compatibility with prior FC transport api's,
+ * and lets remote ports be handled entirely within the FC transport
+ * and independently from the scsi subsystem. The drawback is that
+ * some data will be duplicated.
+ */
+
+struct fc_starget_attrs {	/* aka fc_target_attrs */
+	/* Dynamic Attributes */
+	u64 node_name;
+	u64 port_name;
+	u32 port_id;
+};
+
+#define fc_starget_node_name(x) \
+	(((struct fc_starget_attrs *)&(x)->starget_data)->node_name)
+#define fc_starget_port_name(x)	\
+	(((struct fc_starget_attrs *)&(x)->starget_data)->port_name)
+#define fc_starget_port_id(x) \
+	(((struct fc_starget_attrs *)&(x)->starget_data)->port_id)
+
+#define starget_to_rport(s)			\
+	scsi_is_fc_rport(s->dev.parent) ? dev_to_rport(s->dev.parent) : NULL
+
+
+/*
+ * FC Local Port (Host) Statistics
+ */
+
+/* FC Statistics - Following FC HBAAPI v2.0 guidelines */
+struct fc_host_statistics {
+	/* port statistics */
+	u64 seconds_since_last_reset;
+	u64 tx_frames;
+	u64 tx_words;
+	u64 rx_frames;
+	u64 rx_words;
+	u64 lip_count;
+	u64 nos_count;
+	u64 error_frames;
+	u64 dumped_frames;
+	u64 link_failure_count;
+	u64 loss_of_sync_count;
+	u64 loss_of_signal_count;
+	u64 prim_seq_protocol_err_count;
+	u64 invalid_tx_word_count;
+	u64 invalid_crc_count;
+
+	/* fc4 statistics  (only FCP supported currently) */
+	u64 fcp_input_requests;
+	u64 fcp_output_requests;
+	u64 fcp_control_requests;
+	u64 fcp_input_megabytes;
+	u64 fcp_output_megabytes;
+	u64 fcp_packet_alloc_failures;	/* fcp packet allocation failures */
+	u64 fcp_packet_aborts;		/* fcp packet aborted */
+	u64 fcp_frame_alloc_failures;	/* fcp frame allocation failures */
+
+	/* fc exches statistics */
+	u64 fc_no_free_exch;		/* no free exch memory */
+	u64 fc_no_free_exch_xid;	/* no free exch id */
+	u64 fc_xid_not_found;		/* exch not found for a response */
+	u64 fc_xid_busy;		/* exch exist for new a request */
+	u64 fc_seq_not_found;		/* seq is not found for exchange */
+	u64 fc_non_bls_resp;		/* a non BLS response frame with
+					   a sequence responder in new exch */
+	/* Host Congestion Signals */
+	u64 cn_sig_warn;
+	u64 cn_sig_alarm;
+};
+
+
+/*
+ * FC Event Codes - Polled and Async, following FC HBAAPI v2.0 guidelines
+ */
+
+/*
+ * fc_host_event_code: If you alter this, you also need to alter
+ * scsi_transport_fc.c (for the ascii descriptions).
+ */
+enum fc_host_event_code  {
+	FCH_EVT_LIP			= 0x1,
+	FCH_EVT_LINKUP			= 0x2,
+	FCH_EVT_LINKDOWN		= 0x3,
+	FCH_EVT_LIPRESET		= 0x4,
+	FCH_EVT_RSCN			= 0x5,
+	FCH_EVT_ADAPTER_CHANGE		= 0x103,
+	FCH_EVT_PORT_UNKNOWN		= 0x200,
+	FCH_EVT_PORT_OFFLINE		= 0x201,
+	FCH_EVT_PORT_ONLINE		= 0x202,
+	FCH_EVT_PORT_FABRIC		= 0x204,
+	FCH_EVT_LINK_UNKNOWN		= 0x500,
+	FCH_EVT_LINK_FPIN		= 0x501,
+	FCH_EVT_VENDOR_UNIQUE		= 0xffff,
+};
+
+
+/*
+ * FC Local Port (Host) Attributes
+ *
+ * Attributes are based on HBAAPI V2.0 definitions.
+ * Note: OSDeviceName is determined by user-space library
+ *
+ * Fixed attributes are not expected to change. The driver is
+ * expected to set these values after successfully calling scsi_add_host().
+ * The transport fully manages all get functions w/o driver interaction.
+ *
+ * Dynamic attributes are expected to change. The driver participates
+ * in all get/set operations via functions provided by the driver.
+ *
+ * Private attributes are transport-managed values. They are fully
+ * managed by the transport w/o driver interaction.
+ */
+
+#define FC_VENDOR_IDENTIFIER		8
+#define FC_FC4_LIST_SIZE		32
+#define FC_SYMBOLIC_NAME_SIZE		256
+#define FC_VERSION_STRING_SIZE		64
+#define FC_SERIAL_NUMBER_SIZE		64
+
+struct fc_host_attrs {
+	/* Fixed Attributes */
+	u64 node_name;
+	u64 port_name;
+	u64 permanent_port_name;
+	u32 supported_classes;
+	u8  supported_fc4s[FC_FC4_LIST_SIZE];
+	u32 supported_speeds;
+	u32 maxframe_size;
+	u16 max_npiv_vports;
+	u32 max_ct_payload;
+	u32 num_ports;
+	u32 num_discovered_ports;
+	u32 bootbios_state;
+	char serial_number[FC_SERIAL_NUMBER_SIZE];
+	char manufacturer[FC_SERIAL_NUMBER_SIZE];
+	char model[FC_SYMBOLIC_NAME_SIZE];
+	char model_description[FC_SYMBOLIC_NAME_SIZE];
+	char hardware_version[FC_VERSION_STRING_SIZE];
+	char driver_version[FC_VERSION_STRING_SIZE];
+	char firmware_version[FC_VERSION_STRING_SIZE];
+	char optionrom_version[FC_VERSION_STRING_SIZE];
+	char vendor_identifier[FC_VENDOR_IDENTIFIER];
+	char bootbios_version[FC_SYMBOLIC_NAME_SIZE];
+
+
+	/* Dynamic Attributes */
+	u32 port_id;
+	enum fc_port_type port_type;
+	enum fc_port_state port_state;
+	u8  active_fc4s[FC_FC4_LIST_SIZE];
+	u32 speed;
+	u64 fabric_name;
+	char symbolic_name[FC_SYMBOLIC_NAME_SIZE];
+	char system_hostname[FC_SYMBOLIC_NAME_SIZE];
+	u32 dev_loss_tmo;
+	struct fc_fpin_stats fpin_stats;
+
+	/* Private (Transport-managed) Attributes */
+	enum fc_tgtid_binding_type  tgtid_bind_type;
+
+	/* internal data */
+	struct list_head rports;
+	struct list_head rport_bindings;
+	struct list_head vports;
+	u32 next_rport_number;
+	u32 next_target_id;
+	u32 next_vport_number;
+	u16 npiv_vports_inuse;
+
+	/* work queues for rport state manipulation */
+	char work_q_name[20];
+	struct workqueue_struct *work_q;
+	char devloss_work_q_name[20];
+	struct workqueue_struct *devloss_work_q;
+
+	/* bsg support */
+	struct request_queue *rqst_q;
+
+	/* FDMI support version*/
+	u8 fdmi_version;
+};
+
+#define shost_to_fc_host(x) \
+	((struct fc_host_attrs *)(x)->shost_data)
+
+#define fc_host_node_name(x) \
+	(((struct fc_host_attrs *)(x)->shost_data)->node_name)
+#define fc_host_port_name(x)	\
+	(((struct fc_host_attrs *)(x)->shost_data)->port_name)
+#define fc_host_permanent_port_name(x)	\
+	(((struct fc_host_attrs *)(x)->shost_data)->permanent_port_name)
+#define fc_host_supported_classes(x)	\
+	(((struct fc_host_attrs *)(x)->shost_data)->supported_classes)
+#define fc_host_supported_fc4s(x)	\
+	(((struct fc_host_attrs *)(x)->shost_data)->supported_fc4s)
+#define fc_host_supported_speeds(x)	\
+	(((struct fc_host_attrs *)(x)->shost_data)->supported_speeds)
+#define fc_host_maxframe_size(x)	\
+	(((struct fc_host_attrs *)(x)->shost_data)->maxframe_size)
+#define fc_host_max_npiv_vports(x)	\
+	(((struct fc_host_attrs *)(x)->shost_data)->max_npiv_vports)
+#define fc_host_serial_number(x)	\
+	(((struct fc_host_attrs *)(x)->shost_data)->serial_number)
+#define fc_host_manufacturer(x)	\
+	(((struct fc_host_attrs *)(x)->shost_data)->manufacturer)
+#define fc_host_model(x)	\
+	(((struct fc_host_attrs *)(x)->shost_data)->model)
+#define fc_host_model_description(x)	\
+	(((struct fc_host_attrs *)(x)->shost_data)->model_description)
+#define fc_host_hardware_version(x)	\
+	(((struct fc_host_attrs *)(x)->shost_data)->hardware_version)
+#define fc_host_driver_version(x)	\
+	(((struct fc_host_attrs *)(x)->shost_data)->driver_version)
+#define fc_host_firmware_version(x)	\
+	(((struct fc_host_attrs *)(x)->shost_data)->firmware_version)
+#define fc_host_optionrom_version(x)	\
+	(((struct fc_host_attrs *)(x)->shost_data)->optionrom_version)
+#define fc_host_port_id(x)	\
+	(((struct fc_host_attrs *)(x)->shost_data)->port_id)
+#define fc_host_port_type(x)	\
+	(((struct fc_host_attrs *)(x)->shost_data)->port_type)
+#define fc_host_port_state(x)	\
+	(((struct fc_host_attrs *)(x)->shost_data)->port_state)
+#define fc_host_active_fc4s(x)	\
+	(((struct fc_host_attrs *)(x)->shost_data)->active_fc4s)
+#define fc_host_speed(x)	\
+	(((struct fc_host_attrs *)(x)->shost_data)->speed)
+#define fc_host_fabric_name(x)	\
+	(((struct fc_host_attrs *)(x)->shost_data)->fabric_name)
+#define fc_host_symbolic_name(x)	\
+	(((struct fc_host_attrs *)(x)->shost_data)->symbolic_name)
+#define fc_host_system_hostname(x)	\
+	(((struct fc_host_attrs *)(x)->shost_data)->system_hostname)
+#define fc_host_tgtid_bind_type(x) \
+	(((struct fc_host_attrs *)(x)->shost_data)->tgtid_bind_type)
+#define fc_host_rports(x) \
+	(((struct fc_host_attrs *)(x)->shost_data)->rports)
+#define fc_host_rport_bindings(x) \
+	(((struct fc_host_attrs *)(x)->shost_data)->rport_bindings)
+#define fc_host_vports(x) \
+	(((struct fc_host_attrs *)(x)->shost_data)->vports)
+#define fc_host_next_rport_number(x) \
+	(((struct fc_host_attrs *)(x)->shost_data)->next_rport_number)
+#define fc_host_next_target_id(x) \
+	(((struct fc_host_attrs *)(x)->shost_data)->next_target_id)
+#define fc_host_next_vport_number(x) \
+	(((struct fc_host_attrs *)(x)->shost_data)->next_vport_number)
+#define fc_host_npiv_vports_inuse(x)	\
+	(((struct fc_host_attrs *)(x)->shost_data)->npiv_vports_inuse)
+#define fc_host_work_q_name(x) \
+	(((struct fc_host_attrs *)(x)->shost_data)->work_q_name)
+#define fc_host_work_q(x) \
+	(((struct fc_host_attrs *)(x)->shost_data)->work_q)
+#define fc_host_devloss_work_q_name(x) \
+	(((struct fc_host_attrs *)(x)->shost_data)->devloss_work_q_name)
+#define fc_host_devloss_work_q(x) \
+	(((struct fc_host_attrs *)(x)->shost_data)->devloss_work_q)
+#define fc_host_dev_loss_tmo(x) \
+	(((struct fc_host_attrs *)(x)->shost_data)->dev_loss_tmo)
+#define fc_host_max_ct_payload(x)  \
+	(((struct fc_host_attrs *)(x)->shost_data)->max_ct_payload)
+#define fc_host_vendor_identifier(x)  \
+	(((struct fc_host_attrs *)(x)->shost_data)->vendor_identifier)
+#define fc_host_num_discovered_ports(x)  \
+	(((struct fc_host_attrs *)(x)->shost_data)->num_discovered_ports)
+#define fc_host_num_ports(x)  \
+	(((struct fc_host_attrs *)(x)->shost_data)->num_ports)
+#define fc_host_bootbios_version(x)  \
+	(((struct fc_host_attrs *)(x)->shost_data)->bootbios_version)
+#define fc_host_bootbios_state(x)  \
+	(((struct fc_host_attrs *)(x)->shost_data)->bootbios_state)
+
+/* The functions by which the transport class and the driver communicate */
+struct fc_function_template {
+	void    (*get_rport_dev_loss_tmo)(struct fc_rport *);
+	void	(*set_rport_dev_loss_tmo)(struct fc_rport *, u32);
+
+	void	(*get_starget_node_name)(struct scsi_target *);
+	void	(*get_starget_port_name)(struct scsi_target *);
+	void 	(*get_starget_port_id)(struct scsi_target *);
+
+	void 	(*get_host_port_id)(struct Scsi_Host *);
+	void	(*get_host_port_type)(struct Scsi_Host *);
+	void	(*get_host_port_state)(struct Scsi_Host *);
+	void	(*get_host_active_fc4s)(struct Scsi_Host *);
+	void	(*get_host_speed)(struct Scsi_Host *);
+	void	(*get_host_fabric_name)(struct Scsi_Host *);
+	void	(*get_host_symbolic_name)(struct Scsi_Host *);
+	void	(*set_host_system_hostname)(struct Scsi_Host *);
+
+	struct fc_host_statistics * (*get_fc_host_stats)(struct Scsi_Host *);
+	void	(*reset_fc_host_stats)(struct Scsi_Host *);
+
+	int	(*issue_fc_host_lip)(struct Scsi_Host *);
+
+	void    (*dev_loss_tmo_callbk)(struct fc_rport *);
+	void	(*terminate_rport_io)(struct fc_rport *);
+
+	void	(*set_vport_symbolic_name)(struct fc_vport *);
+	int  	(*vport_create)(struct fc_vport *, bool);
+	int	(*vport_disable)(struct fc_vport *, bool);
+	int  	(*vport_delete)(struct fc_vport *);
+
+	/* bsg support */
+	int	(*bsg_request)(struct bsg_job *);
+	int	(*bsg_timeout)(struct bsg_job *);
+
+	/* allocation lengths for host-specific data */
+	u32	 			dd_fcrport_size;
+	u32	 			dd_fcvport_size;
+	u32				dd_bsg_size;
+
+	/*
+	 * The driver sets these to tell the transport class it
+	 * wants the attributes displayed in sysfs.  If the show_ flag
+	 * is not set, the attribute will be private to the transport
+	 * class
+	 */
+
+	/* remote port fixed attributes */
+	unsigned long	show_rport_maxframe_size:1;
+	unsigned long	show_rport_supported_classes:1;
+	unsigned long   show_rport_dev_loss_tmo:1;
+
+	/*
+	 * target dynamic attributes
+	 * These should all be "1" if the driver uses the remote port
+	 * add/delete functions (so attributes reflect rport values).
+	 */
+	unsigned long	show_starget_node_name:1;
+	unsigned long	show_starget_port_name:1;
+	unsigned long	show_starget_port_id:1;
+
+	/* host fixed attributes */
+	unsigned long	show_host_node_name:1;
+	unsigned long	show_host_port_name:1;
+	unsigned long	show_host_permanent_port_name:1;
+	unsigned long	show_host_supported_classes:1;
+	unsigned long	show_host_supported_fc4s:1;
+	unsigned long	show_host_supported_speeds:1;
+	unsigned long	show_host_maxframe_size:1;
+	unsigned long	show_host_serial_number:1;
+	unsigned long	show_host_manufacturer:1;
+	unsigned long	show_host_model:1;
+	unsigned long	show_host_model_description:1;
+	unsigned long	show_host_hardware_version:1;
+	unsigned long	show_host_driver_version:1;
+	unsigned long	show_host_firmware_version:1;
+	unsigned long	show_host_optionrom_version:1;
+	/* host dynamic attributes */
+	unsigned long	show_host_port_id:1;
+	unsigned long	show_host_port_type:1;
+	unsigned long	show_host_port_state:1;
+	unsigned long	show_host_active_fc4s:1;
+	unsigned long	show_host_speed:1;
+	unsigned long	show_host_fabric_name:1;
+	unsigned long	show_host_symbolic_name:1;
+	unsigned long	show_host_system_hostname:1;
+
+	unsigned long	disable_target_scan:1;
+};
+
+/**
+ * fc_remote_port_chkready - called to validate the remote port state
+ *   prior to initiating io to the port.
+ *
+ * Returns a scsi result code that can be returned by the LLDD.
+ *
+ * @rport:	remote port to be checked
+ **/
+static inline int
+fc_remote_port_chkready(struct fc_rport *rport)
+{
+	int result;
+
+	switch (rport->port_state) {
+	case FC_PORTSTATE_ONLINE:
+	case FC_PORTSTATE_MARGINAL:
+		if (rport->roles & FC_PORT_ROLE_FCP_TARGET)
+			result = 0;
+		else if (rport->flags & FC_RPORT_DEVLOSS_PENDING)
+			result = DID_IMM_RETRY << 16;
+		else
+			result = DID_NO_CONNECT << 16;
+		break;
+	case FC_PORTSTATE_BLOCKED:
+		if (rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT)
+			result = DID_TRANSPORT_FAILFAST << 16;
+		else
+			result = DID_IMM_RETRY << 16;
+		break;
+	default:
+		result = DID_NO_CONNECT << 16;
+		break;
+	}
+	return result;
+}
+
+static inline u64 wwn_to_u64(const u8 *wwn)
+{
+	return get_unaligned_be64(wwn);
+}
+
+static inline void u64_to_wwn(u64 inm, u8 *wwn)
+{
+	put_unaligned_be64(inm, wwn);
+}
+
+/**
+ * fc_vport_set_state() - called to set a vport's state. Saves the old state,
+ *   excepting the transitory states of initializing and sending the ELS
+ *   traffic to instantiate the vport on the link.
+ *
+ * Assumes the driver has surrounded this with the proper locking to ensure
+ * a coherent state change.
+ *
+ * @vport:	virtual port whose state is changing
+ * @new_state:  new state
+ **/
+static inline void
+fc_vport_set_state(struct fc_vport *vport, enum fc_vport_state new_state)
+{
+	if ((new_state != FC_VPORT_UNKNOWN) &&
+	    (new_state != FC_VPORT_INITIALIZING))
+		vport->vport_last_state = vport->vport_state;
+	vport->vport_state = new_state;
+}
+
+struct scsi_transport_template *fc_attach_transport(
+			struct fc_function_template *);
+void fc_release_transport(struct scsi_transport_template *);
+void fc_remove_host(struct Scsi_Host *);
+struct fc_rport *fc_remote_port_add(struct Scsi_Host *shost,
+			int channel, struct fc_rport_identifiers  *ids);
+void fc_remote_port_delete(struct fc_rport  *rport);
+void fc_remote_port_rolechg(struct fc_rport  *rport, u32 roles);
+int scsi_is_fc_rport(const struct device *);
+u32 fc_get_event_number(void);
+void fc_host_post_event(struct Scsi_Host *shost, u32 event_number,
+		enum fc_host_event_code event_code, u32 event_data);
+void fc_host_post_vendor_event(struct Scsi_Host *shost, u32 event_number,
+		u32 data_len, char *data_buf, u64 vendor_id);
+struct fc_rport *fc_find_rport_by_wwpn(struct Scsi_Host *shost, u64 wwpn);
+void fc_host_post_fc_event(struct Scsi_Host *shost, u32 event_number,
+		enum fc_host_event_code event_code,
+		u32 data_len, char *data_buf, u64 vendor_id);
+	/* Note: when specifying vendor_id to fc_host_post_vendor_event()
+	 *   or fc_host_post_fc_event(), be sure to read the Vendor Type
+	 *   and ID formatting requirements specified in scsi_netlink.h
+	 * Note: when calling fc_host_post_fc_event(), vendor_id may be
+	 *   specified as 0.
+	 */
+void fc_host_fpin_rcv(struct Scsi_Host *shost, u32 fpin_len, char *fpin_buf);
+struct fc_vport *fc_vport_create(struct Scsi_Host *shost, int channel,
+		struct fc_vport_identifiers *);
+int fc_vport_terminate(struct fc_vport *vport);
+int fc_block_rport(struct fc_rport *rport);
+int fc_block_scsi_eh(struct scsi_cmnd *cmnd);
+enum blk_eh_timer_return fc_eh_timed_out(struct scsi_cmnd *scmd);
+bool fc_eh_should_retry_cmd(struct scsi_cmnd *scmd);
+
+static inline struct Scsi_Host *fc_bsg_to_shost(struct bsg_job *job)
+{
+	if (scsi_is_host_device(job->dev))
+		return dev_to_shost(job->dev);
+	return rport_to_shost(dev_to_rport(job->dev));
+}
+
+static inline struct fc_rport *fc_bsg_to_rport(struct bsg_job *job)
+{
+	if (scsi_is_fc_rport(job->dev))
+		return dev_to_rport(job->dev);
+	return NULL;
+}
+
+#endif /* SCSI_TRANSPORT_FC_H */