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-rw-r--r--include/scsi/fc_encode.h309
-rw-r--r--include/scsi/fc_frame.h242
-rw-r--r--include/scsi/libfc.h938
3 files changed, 1489 insertions, 0 deletions
diff --git a/include/scsi/fc_encode.h b/include/scsi/fc_encode.h
new file mode 100644
index 00000000000..6300f556bce
--- /dev/null
+++ b/include/scsi/fc_encode.h
@@ -0,0 +1,309 @@
+/*
+ * Copyright(c) 2008 Intel Corporation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope 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.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Maintained at www.Open-FCoE.org
+ */
+
+#ifndef _FC_ENCODE_H_
+#define _FC_ENCODE_H_
+#include <asm/unaligned.h>
+
+struct fc_ns_rft {
+ struct fc_ns_fid fid; /* port ID object */
+ struct fc_ns_fts fts; /* FC4-types object */
+};
+
+struct fc_ct_req {
+ struct fc_ct_hdr hdr;
+ union {
+ struct fc_ns_gid_ft gid;
+ struct fc_ns_rn_id rn;
+ struct fc_ns_rft rft;
+ } payload;
+};
+
+/**
+ * fill FC header fields in specified fc_frame
+ */
+static inline void fc_fill_fc_hdr(struct fc_frame *fp, enum fc_rctl r_ctl,
+ u32 did, u32 sid, enum fc_fh_type type,
+ u32 f_ctl, u32 parm_offset)
+{
+ struct fc_frame_header *fh;
+
+ fh = fc_frame_header_get(fp);
+ WARN_ON(r_ctl == 0);
+ fh->fh_r_ctl = r_ctl;
+ hton24(fh->fh_d_id, did);
+ hton24(fh->fh_s_id, sid);
+ fh->fh_type = type;
+ hton24(fh->fh_f_ctl, f_ctl);
+ fh->fh_cs_ctl = 0;
+ fh->fh_df_ctl = 0;
+ fh->fh_parm_offset = htonl(parm_offset);
+}
+
+/**
+ * fc_ct_hdr_fill- fills ct header and reset ct payload
+ * returns pointer to ct request.
+ */
+static inline struct fc_ct_req *fc_ct_hdr_fill(const struct fc_frame *fp,
+ unsigned int op, size_t req_size)
+{
+ struct fc_ct_req *ct;
+ size_t ct_plen;
+
+ ct_plen = sizeof(struct fc_ct_hdr) + req_size;
+ ct = fc_frame_payload_get(fp, ct_plen);
+ memset(ct, 0, ct_plen);
+ ct->hdr.ct_rev = FC_CT_REV;
+ ct->hdr.ct_fs_type = FC_FST_DIR;
+ ct->hdr.ct_fs_subtype = FC_NS_SUBTYPE;
+ ct->hdr.ct_cmd = htons((u16) op);
+ return ct;
+}
+
+/**
+ * fc_ct_fill - Fill in a name service request frame
+ */
+static inline int fc_ct_fill(struct fc_lport *lport, struct fc_frame *fp,
+ unsigned int op, enum fc_rctl *r_ctl, u32 *did,
+ enum fc_fh_type *fh_type)
+{
+ struct fc_ct_req *ct;
+
+ switch (op) {
+ case FC_NS_GPN_FT:
+ ct = fc_ct_hdr_fill(fp, op, sizeof(struct fc_ns_gid_ft));
+ ct->payload.gid.fn_fc4_type = FC_TYPE_FCP;
+ break;
+
+ case FC_NS_RFT_ID:
+ ct = fc_ct_hdr_fill(fp, op, sizeof(struct fc_ns_rft));
+ hton24(ct->payload.rft.fid.fp_fid,
+ fc_host_port_id(lport->host));
+ ct->payload.rft.fts = lport->fcts;
+ break;
+
+ case FC_NS_RPN_ID:
+ ct = fc_ct_hdr_fill(fp, op, sizeof(struct fc_ns_rn_id));
+ hton24(ct->payload.rn.fr_fid.fp_fid,
+ fc_host_port_id(lport->host));
+ ct->payload.rft.fts = lport->fcts;
+ put_unaligned_be64(lport->wwpn, &ct->payload.rn.fr_wwn);
+ break;
+
+ default:
+ FC_DBG("Invalid op code %x \n", op);
+ return -EINVAL;
+ }
+ *r_ctl = FC_RCTL_DD_UNSOL_CTL;
+ *did = FC_FID_DIR_SERV;
+ *fh_type = FC_TYPE_CT;
+ return 0;
+}
+
+/**
+ * fc_plogi_fill - Fill in plogi request frame
+ */
+static inline void fc_plogi_fill(struct fc_lport *lport, struct fc_frame *fp,
+ unsigned int op)
+{
+ struct fc_els_flogi *plogi;
+ struct fc_els_csp *csp;
+ struct fc_els_cssp *cp;
+
+ plogi = fc_frame_payload_get(fp, sizeof(*plogi));
+ memset(plogi, 0, sizeof(*plogi));
+ plogi->fl_cmd = (u8) op;
+ put_unaligned_be64(lport->wwpn, &plogi->fl_wwpn);
+ put_unaligned_be64(lport->wwnn, &plogi->fl_wwnn);
+
+ csp = &plogi->fl_csp;
+ csp->sp_hi_ver = 0x20;
+ csp->sp_lo_ver = 0x20;
+ csp->sp_bb_cred = htons(10); /* this gets set by gateway */
+ csp->sp_bb_data = htons((u16) lport->mfs);
+ cp = &plogi->fl_cssp[3 - 1]; /* class 3 parameters */
+ cp->cp_class = htons(FC_CPC_VALID | FC_CPC_SEQ);
+ csp->sp_features = htons(FC_SP_FT_CIRO);
+ csp->sp_tot_seq = htons(255); /* seq. we accept */
+ csp->sp_rel_off = htons(0x1f);
+ csp->sp_e_d_tov = htonl(lport->e_d_tov);
+
+ cp->cp_rdfs = htons((u16) lport->mfs);
+ cp->cp_con_seq = htons(255);
+ cp->cp_open_seq = 1;
+}
+
+/**
+ * fc_flogi_fill - Fill in a flogi request frame.
+ */
+static inline void fc_flogi_fill(struct fc_lport *lport, struct fc_frame *fp)
+{
+ struct fc_els_csp *sp;
+ struct fc_els_cssp *cp;
+ struct fc_els_flogi *flogi;
+
+ flogi = fc_frame_payload_get(fp, sizeof(*flogi));
+ memset(flogi, 0, sizeof(*flogi));
+ flogi->fl_cmd = (u8) ELS_FLOGI;
+ put_unaligned_be64(lport->wwpn, &flogi->fl_wwpn);
+ put_unaligned_be64(lport->wwnn, &flogi->fl_wwnn);
+ sp = &flogi->fl_csp;
+ sp->sp_hi_ver = 0x20;
+ sp->sp_lo_ver = 0x20;
+ sp->sp_bb_cred = htons(10); /* this gets set by gateway */
+ sp->sp_bb_data = htons((u16) lport->mfs);
+ cp = &flogi->fl_cssp[3 - 1]; /* class 3 parameters */
+ cp->cp_class = htons(FC_CPC_VALID | FC_CPC_SEQ);
+}
+
+/**
+ * fc_logo_fill - Fill in a logo request frame.
+ */
+static inline void fc_logo_fill(struct fc_lport *lport, struct fc_frame *fp)
+{
+ struct fc_els_logo *logo;
+
+ logo = fc_frame_payload_get(fp, sizeof(*logo));
+ memset(logo, 0, sizeof(*logo));
+ logo->fl_cmd = ELS_LOGO;
+ hton24(logo->fl_n_port_id, fc_host_port_id(lport->host));
+ logo->fl_n_port_wwn = htonll(lport->wwpn);
+}
+
+/**
+ * fc_rtv_fill - Fill in RTV (read timeout value) request frame.
+ */
+static inline void fc_rtv_fill(struct fc_lport *lport, struct fc_frame *fp)
+{
+ struct fc_els_rtv *rtv;
+
+ rtv = fc_frame_payload_get(fp, sizeof(*rtv));
+ memset(rtv, 0, sizeof(*rtv));
+ rtv->rtv_cmd = ELS_RTV;
+}
+
+/**
+ * fc_rec_fill - Fill in rec request frame
+ */
+static inline void fc_rec_fill(struct fc_lport *lport, struct fc_frame *fp)
+{
+ struct fc_els_rec *rec;
+ struct fc_exch *ep = fc_seq_exch(fr_seq(fp));
+
+ rec = fc_frame_payload_get(fp, sizeof(*rec));
+ memset(rec, 0, sizeof(*rec));
+ rec->rec_cmd = ELS_REC;
+ hton24(rec->rec_s_id, fc_host_port_id(lport->host));
+ rec->rec_ox_id = htons(ep->oxid);
+ rec->rec_rx_id = htons(ep->rxid);
+}
+
+/**
+ * fc_prli_fill - Fill in prli request frame
+ */
+static inline void fc_prli_fill(struct fc_lport *lport, struct fc_frame *fp)
+{
+ struct {
+ struct fc_els_prli prli;
+ struct fc_els_spp spp;
+ } *pp;
+
+ pp = fc_frame_payload_get(fp, sizeof(*pp));
+ memset(pp, 0, sizeof(*pp));
+ pp->prli.prli_cmd = ELS_PRLI;
+ pp->prli.prli_spp_len = sizeof(struct fc_els_spp);
+ pp->prli.prli_len = htons(sizeof(*pp));
+ pp->spp.spp_type = FC_TYPE_FCP;
+ pp->spp.spp_flags = FC_SPP_EST_IMG_PAIR;
+ pp->spp.spp_params = htonl(lport->service_params);
+}
+
+/**
+ * fc_scr_fill - Fill in a scr request frame.
+ */
+static inline void fc_scr_fill(struct fc_lport *lport, struct fc_frame *fp)
+{
+ struct fc_els_scr *scr;
+
+ scr = fc_frame_payload_get(fp, sizeof(*scr));
+ memset(scr, 0, sizeof(*scr));
+ scr->scr_cmd = ELS_SCR;
+ scr->scr_reg_func = ELS_SCRF_FULL;
+}
+
+/**
+ * fc_els_fill - Fill in an ELS request frame
+ */
+static inline int fc_els_fill(struct fc_lport *lport, struct fc_rport *rport,
+ struct fc_frame *fp, unsigned int op,
+ enum fc_rctl *r_ctl, u32 *did, enum fc_fh_type *fh_type)
+{
+ switch (op) {
+ case ELS_PLOGI:
+ fc_plogi_fill(lport, fp, ELS_PLOGI);
+ *did = rport->port_id;
+ break;
+
+ case ELS_FLOGI:
+ fc_flogi_fill(lport, fp);
+ *did = FC_FID_FLOGI;
+ break;
+
+ case ELS_LOGO:
+ fc_logo_fill(lport, fp);
+ *did = FC_FID_FLOGI;
+ /*
+ * if rport is valid then it
+ * is port logo, therefore
+ * set did to rport id.
+ */
+ if (rport)
+ *did = rport->port_id;
+ break;
+
+ case ELS_RTV:
+ fc_rtv_fill(lport, fp);
+ *did = rport->port_id;
+ break;
+
+ case ELS_REC:
+ fc_rec_fill(lport, fp);
+ *did = rport->port_id;
+ break;
+
+ case ELS_PRLI:
+ fc_prli_fill(lport, fp);
+ *did = rport->port_id;
+ break;
+
+ case ELS_SCR:
+ fc_scr_fill(lport, fp);
+ *did = FC_FID_FCTRL;
+ break;
+
+ default:
+ FC_DBG("Invalid op code %x \n", op);
+ return -EINVAL;
+ }
+
+ *r_ctl = FC_RCTL_ELS_REQ;
+ *fh_type = FC_TYPE_ELS;
+ return 0;
+}
+#endif /* _FC_ENCODE_H_ */
diff --git a/include/scsi/fc_frame.h b/include/scsi/fc_frame.h
new file mode 100644
index 00000000000..04d34a71355
--- /dev/null
+++ b/include/scsi/fc_frame.h
@@ -0,0 +1,242 @@
+/*
+ * Copyright(c) 2007 Intel Corporation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope 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.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Maintained at www.Open-FCoE.org
+ */
+
+#ifndef _FC_FRAME_H_
+#define _FC_FRAME_H_
+
+#include <linux/scatterlist.h>
+#include <linux/skbuff.h>
+#include <scsi/scsi_cmnd.h>
+
+#include <scsi/fc/fc_fs.h>
+#include <scsi/fc/fc_fcp.h>
+#include <scsi/fc/fc_encaps.h>
+
+/*
+ * The fc_frame interface is used to pass frame data between functions.
+ * The frame includes the data buffer, length, and SOF / EOF delimiter types.
+ * A pointer to the port structure of the receiving port is also includeded.
+ */
+
+#define FC_FRAME_HEADROOM 32 /* headroom for VLAN + FCoE headers */
+#define FC_FRAME_TAILROOM 8 /* trailer space for FCoE */
+
+/*
+ * Information about an individual fibre channel frame received or to be sent.
+ * The buffer may be in up to 4 additional non-contiguous sections,
+ * but the linear section must hold the frame header.
+ */
+#define FC_FRAME_SG_LEN 4 /* scatter/gather list maximum length */
+
+#define fp_skb(fp) (&((fp)->skb))
+#define fr_hdr(fp) ((fp)->skb.data)
+#define fr_len(fp) ((fp)->skb.len)
+#define fr_cb(fp) ((struct fcoe_rcv_info *)&((fp)->skb.cb[0]))
+#define fr_dev(fp) (fr_cb(fp)->fr_dev)
+#define fr_seq(fp) (fr_cb(fp)->fr_seq)
+#define fr_sof(fp) (fr_cb(fp)->fr_sof)
+#define fr_eof(fp) (fr_cb(fp)->fr_eof)
+#define fr_flags(fp) (fr_cb(fp)->fr_flags)
+#define fr_max_payload(fp) (fr_cb(fp)->fr_max_payload)
+#define fr_cmd(fp) (fr_cb(fp)->fr_cmd)
+#define fr_dir(fp) (fr_cmd(fp)->sc_data_direction)
+#define fr_crc(fp) (fr_cb(fp)->fr_crc)
+
+struct fc_frame {
+ struct sk_buff skb;
+};
+
+struct fcoe_rcv_info {
+ struct packet_type *ptype;
+ struct fc_lport *fr_dev; /* transport layer private pointer */
+ struct fc_seq *fr_seq; /* for use with exchange manager */
+ struct scsi_cmnd *fr_cmd; /* for use of scsi command */
+ u32 fr_crc;
+ u16 fr_max_payload; /* max FC payload */
+ enum fc_sof fr_sof; /* start of frame delimiter */
+ enum fc_eof fr_eof; /* end of frame delimiter */
+ u8 fr_flags; /* flags - see below */
+};
+
+
+/*
+ * Get fc_frame pointer for an skb that's already been imported.
+ */
+static inline struct fcoe_rcv_info *fcoe_dev_from_skb(const struct sk_buff *skb)
+{
+ BUILD_BUG_ON(sizeof(struct fcoe_rcv_info) > sizeof(skb->cb));
+ return (struct fcoe_rcv_info *) skb->cb;
+}
+
+/*
+ * fr_flags.
+ */
+#define FCPHF_CRC_UNCHECKED 0x01 /* CRC not computed, still appended */
+
+/*
+ * Initialize a frame.
+ * We don't do a complete memset here for performance reasons.
+ * The caller must set fr_free, fr_hdr, fr_len, fr_sof, and fr_eof eventually.
+ */
+static inline void fc_frame_init(struct fc_frame *fp)
+{
+ fr_dev(fp) = NULL;
+ fr_seq(fp) = NULL;
+ fr_flags(fp) = 0;
+}
+
+struct fc_frame *fc_frame_alloc_fill(struct fc_lport *, size_t payload_len);
+
+struct fc_frame *__fc_frame_alloc(size_t payload_len);
+
+/*
+ * Get frame for sending via port.
+ */
+static inline struct fc_frame *_fc_frame_alloc(struct fc_lport *dev,
+ size_t payload_len)
+{
+ return __fc_frame_alloc(payload_len);
+}
+
+/*
+ * Allocate fc_frame structure and buffer. Set the initial length to
+ * payload_size + sizeof (struct fc_frame_header).
+ */
+static inline struct fc_frame *fc_frame_alloc(struct fc_lport *dev, size_t len)
+{
+ struct fc_frame *fp;
+
+ /*
+ * Note: Since len will often be a constant multiple of 4,
+ * this check will usually be evaluated and eliminated at compile time.
+ */
+ if ((len % 4) != 0)
+ fp = fc_frame_alloc_fill(dev, len);
+ else
+ fp = _fc_frame_alloc(dev, len);
+ return fp;
+}
+
+/*
+ * Free the fc_frame structure and buffer.
+ */
+static inline void fc_frame_free(struct fc_frame *fp)
+{
+ kfree_skb(fp_skb(fp));
+}
+
+static inline int fc_frame_is_linear(struct fc_frame *fp)
+{
+ return !skb_is_nonlinear(fp_skb(fp));
+}
+
+/*
+ * Get frame header from message in fc_frame structure.
+ * This hides a cast and provides a place to add some checking.
+ */
+static inline
+struct fc_frame_header *fc_frame_header_get(const struct fc_frame *fp)
+{
+ WARN_ON(fr_len(fp) < sizeof(struct fc_frame_header));
+ return (struct fc_frame_header *) fr_hdr(fp);
+}
+
+/*
+ * Get frame payload from message in fc_frame structure.
+ * This hides a cast and provides a place to add some checking.
+ * The len parameter is the minimum length for the payload portion.
+ * Returns NULL if the frame is too short.
+ *
+ * This assumes the interesting part of the payload is in the first part
+ * of the buffer for received data. This may not be appropriate to use for
+ * buffers being transmitted.
+ */
+static inline void *fc_frame_payload_get(const struct fc_frame *fp,
+ size_t len)
+{
+ void *pp = NULL;
+
+ if (fr_len(fp) >= sizeof(struct fc_frame_header) + len)
+ pp = fc_frame_header_get(fp) + 1;
+ return pp;
+}
+
+/*
+ * Get frame payload opcode (first byte) from message in fc_frame structure.
+ * This hides a cast and provides a place to add some checking. Return 0
+ * if the frame has no payload.
+ */
+static inline u8 fc_frame_payload_op(const struct fc_frame *fp)
+{
+ u8 *cp;
+
+ cp = fc_frame_payload_get(fp, sizeof(u8));
+ if (!cp)
+ return 0;
+ return *cp;
+
+}
+
+/*
+ * Get FC class from frame.
+ */
+static inline enum fc_class fc_frame_class(const struct fc_frame *fp)
+{
+ return fc_sof_class(fr_sof(fp));
+}
+
+/*
+ * Check the CRC in a frame.
+ * The CRC immediately follows the last data item *AFTER* the length.
+ * The return value is zero if the CRC matches.
+ */
+u32 fc_frame_crc_check(struct fc_frame *);
+
+static inline u8 fc_frame_rctl(const struct fc_frame *fp)
+{
+ return fc_frame_header_get(fp)->fh_r_ctl;
+}
+
+static inline bool fc_frame_is_cmd(const struct fc_frame *fp)
+{
+ return fc_frame_rctl(fp) == FC_RCTL_DD_UNSOL_CMD;
+}
+
+static inline bool fc_frame_is_read(const struct fc_frame *fp)
+{
+ if (fc_frame_is_cmd(fp) && fr_cmd(fp))
+ return fr_dir(fp) == DMA_FROM_DEVICE;
+ return false;
+}
+
+static inline bool fc_frame_is_write(const struct fc_frame *fp)
+{
+ if (fc_frame_is_cmd(fp) && fr_cmd(fp))
+ return fr_dir(fp) == DMA_TO_DEVICE;
+ return false;
+}
+
+/*
+ * Check for leaks.
+ * Print the frame header of any currently allocated frame, assuming there
+ * should be none at this point.
+ */
+void fc_frame_leak_check(void);
+
+#endif /* _FC_FRAME_H_ */
diff --git a/include/scsi/libfc.h b/include/scsi/libfc.h
new file mode 100644
index 00000000000..9f2876397dd
--- /dev/null
+++ b/include/scsi/libfc.h
@@ -0,0 +1,938 @@
+/*
+ * Copyright(c) 2007 Intel Corporation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope 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.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Maintained at www.Open-FCoE.org
+ */
+
+#ifndef _LIBFC_H_
+#define _LIBFC_H_
+
+#include <linux/timer.h>
+#include <linux/if.h>
+
+#include <scsi/scsi_transport.h>
+#include <scsi/scsi_transport_fc.h>
+
+#include <scsi/fc/fc_fcp.h>
+#include <scsi/fc/fc_ns.h>
+#include <scsi/fc/fc_els.h>
+#include <scsi/fc/fc_gs.h>
+
+#include <scsi/fc_frame.h>
+
+#define LIBFC_DEBUG
+
+#ifdef LIBFC_DEBUG
+/* Log messages */
+#define FC_DBG(fmt, args...) \
+ do { \
+ printk(KERN_INFO "%s " fmt, __func__, ##args); \
+ } while (0)
+#else
+#define FC_DBG(fmt, args...)
+#endif
+
+/*
+ * libfc error codes
+ */
+#define FC_NO_ERR 0 /* no error */
+#define FC_EX_TIMEOUT 1 /* Exchange timeout */
+#define FC_EX_CLOSED 2 /* Exchange closed */
+
+/* some helpful macros */
+
+#define ntohll(x) be64_to_cpu(x)
+#define htonll(x) cpu_to_be64(x)
+
+#define ntoh24(p) (((p)[0] << 16) | ((p)[1] << 8) | ((p)[2]))
+
+#define hton24(p, v) do { \
+ p[0] = (((v) >> 16) & 0xFF); \
+ p[1] = (((v) >> 8) & 0xFF); \
+ p[2] = ((v) & 0xFF); \
+ } while (0)
+
+/*
+ * FC HBA status
+ */
+#define FC_PAUSE (1 << 1)
+#define FC_LINK_UP (1 << 0)
+
+enum fc_lport_state {
+ LPORT_ST_NONE = 0,
+ LPORT_ST_FLOGI,
+ LPORT_ST_DNS,
+ LPORT_ST_RPN_ID,
+ LPORT_ST_RFT_ID,
+ LPORT_ST_SCR,
+ LPORT_ST_READY,
+ LPORT_ST_LOGO,
+ LPORT_ST_RESET
+};
+
+enum fc_disc_event {
+ DISC_EV_NONE = 0,
+ DISC_EV_SUCCESS,
+ DISC_EV_FAILED
+};
+
+enum fc_rport_state {
+ RPORT_ST_NONE = 0,
+ RPORT_ST_INIT, /* initialized */
+ RPORT_ST_PLOGI, /* waiting for PLOGI completion */
+ RPORT_ST_PRLI, /* waiting for PRLI completion */
+ RPORT_ST_RTV, /* waiting for RTV completion */
+ RPORT_ST_READY, /* ready for use */
+ RPORT_ST_LOGO, /* port logout sent */
+};
+
+enum fc_rport_trans_state {
+ FC_PORTSTATE_ROGUE,
+ FC_PORTSTATE_REAL,
+};
+
+/**
+ * struct fc_disc_port - temporary discovery port to hold rport identifiers
+ * @lp: Fibre Channel host port instance
+ * @peers: node for list management during discovery and RSCN processing
+ * @ids: identifiers structure to pass to fc_remote_port_add()
+ * @rport_work: work struct for starting the rport state machine
+ */
+struct fc_disc_port {
+ struct fc_lport *lp;
+ struct list_head peers;
+ struct fc_rport_identifiers ids;
+ struct work_struct rport_work;
+};
+
+enum fc_rport_event {
+ RPORT_EV_NONE = 0,
+ RPORT_EV_CREATED,
+ RPORT_EV_FAILED,
+ RPORT_EV_STOP,
+ RPORT_EV_LOGO
+};
+
+struct fc_rport_operations {
+ void (*event_callback)(struct fc_lport *, struct fc_rport *,
+ enum fc_rport_event);
+};
+
+/**
+ * struct fc_rport_libfc_priv - libfc internal information about a remote port
+ * @local_port: Fibre Channel host port instance
+ * @rp_state: state tracks progress of PLOGI, PRLI, and RTV exchanges
+ * @flags: REC and RETRY supported flags
+ * @max_seq: maximum number of concurrent sequences
+ * @retries: retry count in current state
+ * @e_d_tov: error detect timeout value (in msec)
+ * @r_a_tov: resource allocation timeout value (in msec)
+ * @rp_mutex: mutex protects rport
+ * @retry_work:
+ * @event_callback: Callback for rport READY, FAILED or LOGO
+ */
+struct fc_rport_libfc_priv {
+ struct fc_lport *local_port;
+ enum fc_rport_state rp_state;
+ u16 flags;
+ #define FC_RP_FLAGS_REC_SUPPORTED (1 << 0)
+ #define FC_RP_FLAGS_RETRY (1 << 1)
+ u16 max_seq;
+ unsigned int retries;
+ unsigned int e_d_tov;
+ unsigned int r_a_tov;
+ enum fc_rport_trans_state trans_state;
+ struct mutex rp_mutex;
+ struct delayed_work retry_work;
+ enum fc_rport_event event;
+ struct fc_rport_operations *ops;
+ struct list_head peers;
+ struct work_struct event_work;
+};
+
+#define PRIV_TO_RPORT(x) \
+ (struct fc_rport *)((void *)x - sizeof(struct fc_rport));
+#define RPORT_TO_PRIV(x) \
+ (struct fc_rport_libfc_priv *)((void *)x + sizeof(struct fc_rport));
+
+struct fc_rport *fc_rport_rogue_create(struct fc_disc_port *);
+
+static inline void fc_rport_set_name(struct fc_rport *rport, u64 wwpn, u64 wwnn)
+{
+ rport->node_name = wwnn;
+ rport->port_name = wwpn;
+}
+
+/*
+ * fcoe stats structure
+ */
+struct fcoe_dev_stats {
+ u64 SecondsSinceLastReset;
+ u64 TxFrames;
+ u64 TxWords;
+ u64 RxFrames;
+ u64 RxWords;
+ u64 ErrorFrames;
+ u64 DumpedFrames;
+ u64 LinkFailureCount;
+ u64 LossOfSignalCount;
+ u64 InvalidTxWordCount;
+ u64 InvalidCRCCount;
+ u64 InputRequests;
+ u64 OutputRequests;
+ u64 ControlRequests;
+ u64 InputMegabytes;
+ u64 OutputMegabytes;
+};
+
+/*
+ * els data is used for passing ELS respone specific
+ * data to send ELS response mainly using infomation
+ * in exchange and sequence in EM layer.
+ */
+struct fc_seq_els_data {
+ struct fc_frame *fp;
+ enum fc_els_rjt_reason reason;
+ enum fc_els_rjt_explan explan;
+};
+
+/*
+ * FCP request structure, one for each scsi cmd request
+ */
+struct fc_fcp_pkt {
+ /*
+ * housekeeping stuff
+ */
+ struct fc_lport *lp; /* handle to hba struct */
+ u16 state; /* scsi_pkt state state */
+ u16 tgt_flags; /* target flags */
+ atomic_t ref_cnt; /* fcp pkt ref count */
+ spinlock_t scsi_pkt_lock; /* Must be taken before the host lock
+ * if both are held at the same time */
+ /*
+ * SCSI I/O related stuff
+ */
+ struct scsi_cmnd *cmd; /* scsi command pointer. set/clear
+ * under host lock */
+ struct list_head list; /* tracks queued commands. access under
+ * host lock */
+ /*
+ * timeout related stuff
+ */
+ struct timer_list timer; /* command timer */
+ struct completion tm_done;
+ int wait_for_comp;
+ unsigned long start_time; /* start jiffie */
+ unsigned long end_time; /* end jiffie */
+ unsigned long last_pkt_time; /* jiffies of last frame received */
+
+ /*
+ * scsi cmd and data transfer information
+ */
+ u32 data_len;
+ /*
+ * transport related veriables
+ */
+ struct fcp_cmnd cdb_cmd;
+ size_t xfer_len;
+ u32 xfer_contig_end; /* offset of end of contiguous xfer */
+ u16 max_payload; /* max payload size in bytes */
+
+ /*
+ * scsi/fcp return status
+ */
+ u32 io_status; /* SCSI result upper 24 bits */
+ u8 cdb_status;
+ u8 status_code; /* FCP I/O status */
+ /* bit 3 Underrun bit 2: overrun */
+ u8 scsi_comp_flags;
+ u32 req_flags; /* bit 0: read bit:1 write */
+ u32 scsi_resid; /* residule length */
+
+ struct fc_rport *rport; /* remote port pointer */
+ struct fc_seq *seq_ptr; /* current sequence pointer */
+ /*
+ * Error Processing
+ */
+ u8 recov_retry; /* count of recovery retries */
+ struct fc_seq *recov_seq; /* sequence for REC or SRR */
+};
+
+/*
+ * Structure and function definitions for managing Fibre Channel Exchanges
+ * and Sequences
+ *
+ * fc_exch holds state for one exchange and links to its active sequence.
+ *
+ * fc_seq holds the state for an individual sequence.
+ */
+
+struct fc_exch_mgr;
+
+/*
+ * Sequence.
+ */
+struct fc_seq {
+ u8 id; /* seq ID */
+ u16 ssb_stat; /* status flags for sequence status block */
+ u16 cnt; /* frames sent so far on sequence */
+ u32 rec_data; /* FC-4 value for REC */
+};
+
+#define FC_EX_DONE (1 << 0) /* ep is completed */
+#define FC_EX_RST_CLEANUP (1 << 1) /* reset is forcing completion */
+
+/*
+ * Exchange.
+ *
+ * Locking notes: The ex_lock protects following items:
+ * state, esb_stat, f_ctl, seq.ssb_stat
+ * seq_id
+ * sequence allocation
+ */
+struct fc_exch {
+ struct fc_exch_mgr *em; /* exchange manager */
+ u32 state; /* internal driver state */
+ u16 xid; /* our exchange ID */
+ struct list_head ex_list; /* free or busy list linkage */
+ spinlock_t ex_lock; /* lock covering exchange state */
+ atomic_t ex_refcnt; /* reference counter */
+ struct delayed_work timeout_work; /* timer for upper level protocols */
+ struct fc_lport *lp; /* fc device instance */
+ u16 oxid; /* originator's exchange ID */
+ u16 rxid; /* responder's exchange ID */
+ u32 oid; /* originator's FCID */
+ u32 sid; /* source FCID */
+ u32 did; /* destination FCID */
+ u32 esb_stat; /* exchange status for ESB */
+ u32 r_a_tov; /* r_a_tov from rport (msec) */
+ u8 seq_id; /* next sequence ID to use */
+ u32 f_ctl; /* F_CTL flags for sequences */
+ u8 fh_type; /* frame type */
+ enum fc_class class; /* class of service */
+ struct fc_seq seq; /* single sequence */
+ /*
+ * Handler for responses to this current exchange.
+ */
+ void (*resp)(struct fc_seq *, struct fc_frame *, void *);
+ void (*destructor)(struct fc_seq *, void *);
+ /*
+ * arg is passed as void pointer to exchange
+ * resp and destructor handlers
+ */
+ void *arg;
+};
+#define fc_seq_exch(sp) container_of(sp, struct fc_exch, seq)
+
+struct libfc_function_template {
+
+ /**
+ * Mandatory Fields
+ *
+ * These handlers must be implemented by the LLD.
+ */
+
+ /*
+ * Interface to send a FC frame
+ */
+ int (*frame_send)(struct fc_lport *lp, struct fc_frame *fp);
+
+ /**
+ * Optional Fields
+ *
+ * The LLD may choose to implement any of the following handlers.
+ * If LLD doesn't specify hander and leaves its pointer NULL then
+ * the default libfc function will be used for that handler.
+ */
+
+ /**
+ * ELS/CT interfaces
+ */
+
+ /*
+ * elsct_send - sends ELS/CT frame
+ */
+ struct fc_seq *(*elsct_send)(struct fc_lport *lport,
+ struct fc_rport *rport,
+ struct fc_frame *fp,
+ unsigned int op,
+ void (*resp)(struct fc_seq *,
+ struct fc_frame *fp,
+ void *arg),
+ void *arg, u32 timer_msec);
+ /**
+ * Exhance Manager interfaces
+ */
+
+ /*
+ * Send the FC frame payload using a new exchange and sequence.
+ *
+ * The frame pointer with some of the header's fields must be
+ * filled before calling exch_seq_send(), those fields are,
+ *
+ * - routing control
+ * - FC port did
+ * - FC port sid
+ * - FC header type
+ * - frame control
+ * - parameter or relative offset
+ *
+ * The exchange response handler is set in this routine to resp()
+ * function pointer. It can be called in two scenarios: if a timeout
+ * occurs or if a response frame is received for the exchange. The
+ * fc_frame pointer in response handler will also indicate timeout
+ * as error using IS_ERR related macros.
+ *
+ * The exchange destructor handler is also set in this routine.
+ * The destructor handler is invoked by EM layer when exchange
+ * is about to free, this can be used by caller to free its
+ * resources along with exchange free.
+ *
+ * The arg is passed back to resp and destructor handler.
+ *
+ * The timeout value (in msec) for an exchange is set if non zero
+ * timer_msec argument is specified. The timer is canceled when
+ * it fires or when the exchange is done. The exchange timeout handler
+ * is registered by EM layer.
+ */
+ struct fc_seq *(*exch_seq_send)(struct fc_lport *lp,
+ struct fc_frame *fp,
+ void (*resp)(struct fc_seq *sp,
+ struct fc_frame *fp,
+ void *arg),
+ void (*destructor)(struct fc_seq *sp,
+ void *arg),
+ void *arg, unsigned int timer_msec);
+
+ /*
+ * send a frame using existing sequence and exchange.
+ */
+ int (*seq_send)(struct fc_lport *lp, struct fc_seq *sp,
+ struct fc_frame *fp);
+
+ /*
+ * Send ELS response using mainly infomation
+ * in exchange and sequence in EM layer.
+ */
+ void (*seq_els_rsp_send)(struct fc_seq *sp, enum fc_els_cmd els_cmd,
+ struct fc_seq_els_data *els_data);
+
+ /*
+ * Abort an exchange and sequence. Generally called because of a
+ * exchange timeout or an abort from the upper layer.
+ *
+ * A timer_msec can be specified for abort timeout, if non-zero
+ * timer_msec value is specified then exchange resp handler
+ * will be called with timeout error if no response to abort.
+ */
+ int (*seq_exch_abort)(const struct fc_seq *req_sp,
+ unsigned int timer_msec);
+
+ /*
+ * Indicate that an exchange/sequence tuple is complete and the memory
+ * allocated for the related objects may be freed.
+ */
+ void (*exch_done)(struct fc_seq *sp);
+
+ /*
+ * Assigns a EM and a free XID for an new exchange and then
+ * allocates a new exchange and sequence pair.
+ * The fp can be used to determine free XID.
+ */
+ struct fc_exch *(*exch_get)(struct fc_lport *lp, struct fc_frame *fp);
+
+ /*
+ * Release previously assigned XID by exch_get API.
+ * The LLD may implement this if XID is assigned by LLD
+ * in exch_get().
+ */
+ void (*exch_put)(struct fc_lport *lp, struct fc_exch_mgr *mp,
+ u16 ex_id);
+
+ /*
+ * Start a new sequence on the same exchange/sequence tuple.
+ */
+ struct fc_seq *(*seq_start_next)(struct fc_seq *sp);
+
+ /*
+ * Reset an exchange manager, completing all sequences and exchanges.
+ * If s_id is non-zero, reset only exchanges originating from that FID.
+ * If d_id is non-zero, reset only exchanges sending to that FID.
+ */
+ void (*exch_mgr_reset)(struct fc_exch_mgr *,
+ u32 s_id, u32 d_id);
+
+ void (*rport_flush_queue)(void);
+ /**
+ * Local Port interfaces
+ */
+
+ /*
+ * Receive a frame to a local port.
+ */
+ void (*lport_recv)(struct fc_lport *lp, struct fc_seq *sp,
+ struct fc_frame *fp);
+
+ int (*lport_reset)(struct fc_lport *);
+
+ /**
+ * Remote Port interfaces
+ */
+
+ /*
+ * Initiates the RP state machine. It is called from the LP module.
+ * This function will issue the following commands to the N_Port
+ * identified by the FC ID provided.
+ *
+ * - PLOGI
+ * - PRLI
+ * - RTV
+ */
+ int (*rport_login)(struct fc_rport *rport);
+
+ /*
+ * Logoff, and remove the rport from the transport if
+ * it had been added. This will send a LOGO to the target.
+ */
+ int (*rport_logoff)(struct fc_rport *rport);
+
+ /*
+ * Recieve a request from a remote port.
+ */
+ void (*rport_recv_req)(struct fc_seq *, struct fc_frame *,
+ struct fc_rport *);
+
+ struct fc_rport *(*rport_lookup)(const struct fc_lport *, u32);
+
+ /**
+ * FCP interfaces
+ */
+
+ /*
+ * Send a fcp cmd from fsp pkt.
+ * Called with the SCSI host lock unlocked and irqs disabled.
+ *
+ * The resp handler is called when FCP_RSP received.
+ *
+ */
+ int (*fcp_cmd_send)(struct fc_lport *lp, struct fc_fcp_pkt *fsp,
+ void (*resp)(struct fc_seq *, struct fc_frame *fp,
+ void *arg));
+
+ /*
+ * Used at least durring linkdown and reset
+ */
+ void (*fcp_cleanup)(struct fc_lport *lp);
+
+ /*
+ * Abort all I/O on a local port
+ */
+ void (*fcp_abort_io)(struct fc_lport *lp);
+
+ /**
+ * Discovery interfaces
+ */
+
+ void (*disc_recv_req)(struct fc_seq *,
+ struct fc_frame *, struct fc_lport *);
+
+ /*
+ * Start discovery for a local port.
+ */
+ void (*disc_start)(void (*disc_callback)(struct fc_lport *,
+ enum fc_disc_event),
+ struct fc_lport *);
+
+ /*
+ * Stop discovery for a given lport. This will remove
+ * all discovered rports
+ */
+ void (*disc_stop) (struct fc_lport *);
+
+ /*
+ * Stop discovery for a given lport. This will block
+ * until all discovered rports are deleted from the
+ * FC transport class
+ */
+ void (*disc_stop_final) (struct fc_lport *);
+};
+
+/* information used by the discovery layer */
+struct fc_disc {
+ unsigned char retry_count;
+ unsigned char delay;
+ unsigned char pending;
+ unsigned char requested;
+ unsigned short seq_count;
+ unsigned char buf_len;
+ enum fc_disc_event event;
+
+ void (*disc_callback)(struct fc_lport *,
+ enum fc_disc_event);
+
+ struct list_head rports;
+ struct fc_lport *lport;
+ struct mutex disc_mutex;
+ struct fc_gpn_ft_resp partial_buf; /* partial name buffer */
+ struct delayed_work disc_work;
+};
+
+struct fc_lport {
+ struct list_head list;
+
+ /* Associations */
+ struct Scsi_Host *host;
+ struct fc_exch_mgr *emp;
+ struct fc_rport *dns_rp;
+ struct fc_rport *ptp_rp;
+ void *scsi_priv;
+ struct fc_disc disc;
+
+ /* Operational Information */
+ struct libfc_function_template tt;
+ u16 link_status;
+ enum fc_lport_state state;
+ unsigned long boot_time;
+
+ struct fc_host_statistics host_stats;
+ struct fcoe_dev_stats *dev_stats[NR_CPUS];
+ u64 wwpn;
+ u64 wwnn;
+ u8 retry_count;
+
+ /* Capabilities */
+ u32 sg_supp:1; /* scatter gather supported */
+ u32 seq_offload:1; /* seq offload supported */
+ u32 crc_offload:1; /* crc offload supported */
+ u32 lro_enabled:1; /* large receive offload */
+ u32 mfs; /* max FC payload size */
+ unsigned int service_params;
+ unsigned int e_d_tov;
+ unsigned int r_a_tov;
+ u8 max_retry_count;
+ u16 link_speed;
+ u16 link_supported_speeds;
+ u16 lro_xid; /* max xid for fcoe lro */
+ struct fc_ns_fts fcts; /* FC-4 type masks */
+ struct fc_els_rnid_gen rnid_gen; /* RNID information */
+
+ /* Semaphores */
+ struct mutex lp_mutex;
+
+ /* Miscellaneous */
+ struct delayed_work retry_work;
+ struct delayed_work disc_work;
+};
+
+/**
+ * FC_LPORT HELPER FUNCTIONS
+ *****************************/
+static inline void *lport_priv(const struct fc_lport *lp)
+{
+ return (void *)(lp + 1);
+}
+
+static inline int fc_lport_test_ready(struct fc_lport *lp)
+{
+ return lp->state == LPORT_ST_READY;
+}
+
+static inline void fc_set_wwnn(struct fc_lport *lp, u64 wwnn)
+{
+ lp->wwnn = wwnn;
+}
+
+static inline void fc_set_wwpn(struct fc_lport *lp, u64 wwnn)
+{
+ lp->wwpn = wwnn;
+}
+
+static inline void fc_lport_state_enter(struct fc_lport *lp,
+ enum fc_lport_state state)
+{
+ if (state != lp->state)
+ lp->retry_count = 0;
+ lp->state = state;
+}
+
+
+/**
+ * LOCAL PORT LAYER
+ *****************************/
+int fc_lport_init(struct fc_lport *lp);
+
+/*
+ * Destroy the specified local port by finding and freeing all
+ * fc_rports associated with it and then by freeing the fc_lport
+ * itself.
+ */
+int fc_lport_destroy(struct fc_lport *lp);
+
+/*
+ * Logout the specified local port from the fabric
+ */
+int fc_fabric_logoff(struct fc_lport *lp);
+
+/*
+ * Initiate the LP state machine. This handler will use fc_host_attr
+ * to store the FLOGI service parameters, so fc_host_attr must be
+ * initialized before calling this handler.
+ */
+int fc_fabric_login(struct fc_lport *lp);
+
+/*
+ * The link is up for the given local port.
+ */
+void fc_linkup(struct fc_lport *);
+
+/*
+ * Link is down for the given local port.
+ */
+void fc_linkdown(struct fc_lport *);
+
+/*
+ * Pause and unpause traffic.
+ */
+void fc_pause(struct fc_lport *);
+void fc_unpause(struct fc_lport *);
+
+/*
+ * Configure the local port.
+ */
+int fc_lport_config(struct fc_lport *);
+
+/*
+ * Reset the local port.
+ */
+int fc_lport_reset(struct fc_lport *);
+
+/*
+ * Set the mfs or reset
+ */
+int fc_set_mfs(struct fc_lport *lp, u32 mfs);
+
+
+/**
+ * REMOTE PORT LAYER
+ *****************************/
+int fc_rport_init(struct fc_lport *lp);
+void fc_rport_terminate_io(struct fc_rport *rp);
+
+/**
+ * DISCOVERY LAYER
+ *****************************/
+int fc_disc_init(struct fc_lport *lp);
+
+
+/**
+ * SCSI LAYER
+ *****************************/
+/*
+ * Initialize the SCSI block of libfc
+ */
+int fc_fcp_init(struct fc_lport *);
+
+/*
+ * This section provides an API which allows direct interaction
+ * with the SCSI-ml. Each of these functions satisfies a function
+ * pointer defined in Scsi_Host and therefore is always called
+ * directly from the SCSI-ml.
+ */
+int fc_queuecommand(struct scsi_cmnd *sc_cmd,
+ void (*done)(struct scsi_cmnd *));
+
+/*
+ * complete processing of a fcp packet
+ *
+ * This function may sleep if a fsp timer is pending.
+ * The host lock must not be held by caller.
+ */
+void fc_fcp_complete(struct fc_fcp_pkt *fsp);
+
+/*
+ * Send an ABTS frame to the target device. The sc_cmd argument
+ * is a pointer to the SCSI command to be aborted.
+ */
+int fc_eh_abort(struct scsi_cmnd *sc_cmd);
+
+/*
+ * Reset a LUN by sending send the tm cmd to the target.
+ */
+int fc_eh_device_reset(struct scsi_cmnd *sc_cmd);
+
+/*
+ * Reset the host adapter.
+ */
+int fc_eh_host_reset(struct scsi_cmnd *sc_cmd);
+
+/*
+ * Check rport status.
+ */
+int fc_slave_alloc(struct scsi_device *sdev);
+
+/*
+ * Adjust the queue depth.
+ */
+int fc_change_queue_depth(struct scsi_device *sdev, int qdepth);
+
+/*
+ * Change the tag type.
+ */
+int fc_change_queue_type(struct scsi_device *sdev, int tag_type);
+
+/*
+ * Free memory pools used by the FCP layer.
+ */
+void fc_fcp_destroy(struct fc_lport *);
+
+/**
+ * ELS/CT interface
+ *****************************/
+/*
+ * Initializes ELS/CT interface
+ */
+int fc_elsct_init(struct fc_lport *lp);
+
+
+/**
+ * EXCHANGE MANAGER LAYER
+ *****************************/
+/*
+ * Initializes Exchange Manager related
+ * function pointers in struct libfc_function_template.
+ */
+int fc_exch_init(struct fc_lport *lp);
+
+/*
+ * Allocates an Exchange Manager (EM).
+ *
+ * The EM manages exchanges for their allocation and
+ * free, also allows exchange lookup for received
+ * frame.
+ *
+ * The class is used for initializing FC class of
+ * allocated exchange from EM.
+ *
+ * The min_xid and max_xid will limit new
+ * exchange ID (XID) within this range for
+ * a new exchange.
+ * The LLD may choose to have multiple EMs,
+ * e.g. one EM instance per CPU receive thread in LLD.
+ * The LLD can use exch_get() of struct libfc_function_template
+ * to specify XID for a new exchange within
+ * a specified EM instance.
+ *
+ * The em_idx to uniquely identify an EM instance.
+ */
+struct fc_exch_mgr *fc_exch_mgr_alloc(struct fc_lport *lp,
+ enum fc_class class,
+ u16 min_xid,
+ u16 max_xid);
+
+/*
+ * Free an exchange manager.
+ */
+void fc_exch_mgr_free(struct fc_exch_mgr *mp);
+
+/*
+ * Receive a frame on specified local port and exchange manager.
+ */
+void fc_exch_recv(struct fc_lport *lp, struct fc_exch_mgr *mp,
+ struct fc_frame *fp);
+
+/*
+ * This function is for exch_seq_send function pointer in
+ * struct libfc_function_template, see comment block on
+ * exch_seq_send for description of this function.
+ */
+struct fc_seq *fc_exch_seq_send(struct fc_lport *lp,
+ struct fc_frame *fp,
+ void (*resp)(struct fc_seq *sp,
+ struct fc_frame *fp,
+ void *arg),
+ void (*destructor)(struct fc_seq *sp,
+ void *arg),
+ void *arg, u32 timer_msec);
+
+/*
+ * send a frame using existing sequence and exchange.
+ */
+int fc_seq_send(struct fc_lport *lp, struct fc_seq *sp, struct fc_frame *fp);
+
+/*
+ * Send ELS response using mainly infomation
+ * in exchange and sequence in EM layer.
+ */
+void fc_seq_els_rsp_send(struct fc_seq *sp, enum fc_els_cmd els_cmd,
+ struct fc_seq_els_data *els_data);
+
+/*
+ * This function is for seq_exch_abort function pointer in
+ * struct libfc_function_template, see comment block on
+ * seq_exch_abort for description of this function.
+ */
+int fc_seq_exch_abort(const struct fc_seq *req_sp, unsigned int timer_msec);
+
+/*
+ * Indicate that an exchange/sequence tuple is complete and the memory
+ * allocated for the related objects may be freed.
+ */
+void fc_exch_done(struct fc_seq *sp);
+
+/*
+ * Assigns a EM and XID for a frame and then allocates
+ * a new exchange and sequence pair.
+ * The fp can be used to determine free XID.
+ */
+struct fc_exch *fc_exch_get(struct fc_lport *lp, struct fc_frame *fp);
+
+/*
+ * Allocate a new exchange and sequence pair.
+ * if ex_id is zero then next free exchange id
+ * from specified exchange manger mp will be assigned.
+ */
+struct fc_exch *fc_exch_alloc(struct fc_exch_mgr *mp,
+ struct fc_frame *fp, u16 ex_id);
+/*
+ * Start a new sequence on the same exchange as the supplied sequence.
+ */
+struct fc_seq *fc_seq_start_next(struct fc_seq *sp);
+
+/*
+ * Reset an exchange manager, completing all sequences and exchanges.
+ * If s_id is non-zero, reset only exchanges originating from that FID.
+ * If d_id is non-zero, reset only exchanges sending to that FID.
+ */
+void fc_exch_mgr_reset(struct fc_exch_mgr *, u32 s_id, u32 d_id);
+
+/*
+ * Functions for fc_functions_template
+ */
+void fc_get_host_speed(struct Scsi_Host *shost);
+void fc_get_host_port_type(struct Scsi_Host *shost);
+void fc_get_host_port_state(struct Scsi_Host *shost);
+void fc_set_rport_loss_tmo(struct fc_rport *rport, u32 timeout);
+struct fc_host_statistics *fc_get_host_stats(struct Scsi_Host *);
+
+/*
+ * module setup functions.
+ */
+int fc_setup_exch_mgr(void);
+void fc_destroy_exch_mgr(void);
+int fc_setup_rport(void);
+void fc_destroy_rport(void);
+
+#endif /* _LIBFC_H_ */