[PATCH 00/35] libfc, libfcoe and fcoe updates for 2.6.32

[PATCH 00/35] libfc, libfcoe and fcoe updates for 2.6.32

[Robert Love]

The following series implements a variety of features and fixes
for the 2.6.32 kernel. At a high level they are the following-

1) NPIV support

2) Symbolic name registration with the fabric

3) libfc FC passthrough support

4) Style and comment improvements

5) can_queue adjustments for frame allocation failures

6) Variety of minor improvements and bug fixes

These patches were built on scsi-misc.git rebased to the current
linux-2.6. As well as on top of Vasu Dev's queue depth patch set.

---

Chris Leech (15):
      fcoe: vport symbolic name support
      libfc: combine name server registration request functions
      libfc: combine name server registration response handlers
      libfc: Register Symbolic Port Name (RSPN_ID)
      libfc: Register Symbolic Node Name (RSNN_NN)
      libfc: RNN_ID may be required before RSNN_NN with some switches
      libfc: RPN_ID is obsolete and unnecessary
      fcoe: NPIV vport create/destroy
      fcoe: add a separate scsi transport template for NPIV vports
      libfcoe, fcoe: libfcoe NPIV support
      libfc, libfcoe: FDISC ELS for NPIV
      libfc: vport link handling and fc_vport state managment
      libfc: add some generic NPIV support routines to libfc
      libfc: changes to libfc_host_alloc to consolidate initialization with allocation
      libfc, fcoe: fixes for highmem skb linearize panics

Joe Eykholt (1):
      libfc: fix typo in retry check on received PRLI

Robert Love (12):
      fcoe: Formatting cleanups and commenting
      libfcoe: formatting and comment cleanups
      libfc: Formatting cleanups across libfc
      libfc: Remove unused fc_lport pointer from fc_fcp_pkt_abort
      libfc, fcoe: Don't EXPORT_SYMBOLS unnecessarily
      libfc: Add routine to copy data from a buffer to a SG list
      libfc: Export FC headers
      libfc: Move libfc_init and libfc_exit to fc_libfc.c
      libfc: Add libfc/fc_libfc.[ch] for libfc internal routines
      libfc: Remove fc_fcp_complete
      libfc: Move non-common routines and prototypes out of libfc.h
      fcoe: Increase FCOE_MAX_LUN to 0xFFFF (65535)

Steve Ma (1):
      libfc, fcoe: Add FC passthrough support

Vasu Dev (3):
      libfc: adds can_queue ramp up
      libfc: reduce can_queue for all FCP frame allocation failures
      fcoe, libfc: use single frame allocation API

Yi Zou (3):
      libfc: Fix wrong scsi return status under FC_DATA_UNDRUN
      fcoe: remove redundant checking of netdev->netdev_ops
      libfc: fix ddp in fc_fcp for 0 xid


 drivers/scsi/fcoe/fcoe.c      | 1073 ++++++++++++++++++++++++++-------------
 drivers/scsi/fcoe/fcoe.h      |   76 ++-
 drivers/scsi/fcoe/libfcoe.c   |  288 ++++++----
 drivers/scsi/fnic/fnic_main.c |   10 
 drivers/scsi/libfc/Makefile   |    4 
 drivers/scsi/libfc/fc_disc.c  |   80 +--
 drivers/scsi/libfc/fc_elsct.c |   34 +
 drivers/scsi/libfc/fc_exch.c  |  892 +++++++++++++++++++++-----------
 drivers/scsi/libfc/fc_fcp.c   |  988 +++++++++++++++++++-----------------
 drivers/scsi/libfc/fc_frame.c |   13 
 drivers/scsi/libfc/fc_libfc.c |  134 +++++
 drivers/scsi/libfc/fc_libfc.h |  112 ++++
 drivers/scsi/libfc/fc_lport.c |  757 +++++++++++++++++++--------
 drivers/scsi/libfc/fc_npiv.c  |  161 ++++++
 drivers/scsi/libfc/fc_rport.c |  243 +++++----
 include/scsi/Kbuild           |    1 
 include/scsi/fc/Kbuild        |    4 
 include/scsi/fc/fc_els.h      |    6 
 include/scsi/fc/fc_fs.h       |    2 
 include/scsi/fc/fc_gs.h       |    2 
 include/scsi/fc/fc_ns.h       |   22 +
 include/scsi/fc_encode.h      |   54 ++
 include/scsi/fc_frame.h       |   19 -
 include/scsi/libfc.h          | 1131 +++++++++++++++++++----------------------
 include/scsi/libfcoe.h        |   89 ++-
 25 files changed, 3851 insertions(+), 2344 deletions(-)
 create mode 100644 drivers/scsi/libfc/fc_libfc.c
 create mode 100644 drivers/scsi/libfc/fc_libfc.h
 create mode 100644 drivers/scsi/libfc/fc_npiv.c
 create mode 100644 include/scsi/fc/Kbuild

-- 
//Rob

[PATCH 01/35] libfc: fix typo in retry check on received PRLI

[Robert Love]

From: Joe Eykholt <jeykholt@cisco.com>

A received Fibre Channel ELS PRLI request contains a bit that
indicates whether the remote port supports certain retry processing
sequences.  The test for this bit was somehow coded to use multiply
instead of AND!

This case would apply only for target mode operation, and it is
unlikely to be noticed as an initiator.

Signed-off-by: Joe Eykholt <jeykholt@cisco.com>
Signed-off-by: Robert Love <robert.w.love@intel.com>
---

 drivers/scsi/libfc/fc_rport.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/scsi/libfc/fc_rport.c b/drivers/scsi/libfc/fc_rport.c
index 03ea674..bdc9732 100644
--- a/drivers/scsi/libfc/fc_rport.c
+++ b/drivers/scsi/libfc/fc_rport.c
@@ -1402,7 +1402,7 @@ static void fc_rport_recv_prli_req(struct fc_rport_priv *rdata,
 				break;
 			case FC_TYPE_FCP:
 				fcp_parm = ntohl(rspp->spp_params);
-				if (fcp_parm * FCP_SPPF_RETRY)
+				if (fcp_parm & FCP_SPPF_RETRY)
 					rdata->flags |= FC_RP_FLAGS_RETRY;
 				rdata->supported_classes = FC_COS_CLASS3;
 				if (fcp_parm & FCP_SPPF_INIT_FCN)

[PATCH 02/35] fcoe: Increase FCOE_MAX_LUN to 0xFFFF (65535)

[Robert Love]

The maximum number of LUNs was far too low. This value is
what most other FC HBAs are using.

Signed-off-by: Robert Love <robert.w.love@intel.com>
---

 drivers/scsi/fcoe/fcoe.h |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/scsi/fcoe/fcoe.h b/drivers/scsi/fcoe/fcoe.h
index ce7f60f..aa9c2d0 100644
--- a/drivers/scsi/fcoe/fcoe.h
+++ b/drivers/scsi/fcoe/fcoe.h
@@ -32,7 +32,7 @@
 #define FCOE_NAME	"fcoe"
 #define FCOE_VENDOR	"Open-FCoE.org"
 
-#define FCOE_MAX_LUN		255
+#define FCOE_MAX_LUN		0xFFFF
 #define FCOE_MAX_FCP_TARGET	256
 
 #define FCOE_MAX_OUTSTANDING_COMMANDS	1024

[PATCH 03/35] libfc: Move non-common routines and prototypes out of libfc.h

[Robert Love]

This patch moves all non-common routines and function prototypes
out of libfc.h and into the appropriate .c files. It makes these
routines 'static' when necessary and removes any unnecessary EXPORT_SYMBOL
statements.

A result of moving the fc_exch_seq_send, fc_seq_els_rsp_send, fc_exch_alloc
and fc_seq_start_next prototypes out of libfc.h is that they were no longer
being imported into fc_exch.c when libfc.h was included. This caused errors
where routines in fc_exch.c were looking for undefined symbols. To fix this
this patch reorganizes fc_seq_alloc, fc_seq_start_next and
fc_seq_start_next_locked. This move also made it so that
fc_seq_start_next_locked did not need to be prototyped at the top of
fc_exch.c.

Signed-off-by: Robert Love <robert.w.love@intel.com>
---

 drivers/scsi/libfc/fc_exch.c |  329 +++++++++++++++++++++++-------------------
 include/scsi/libfc.h         |   49 ------
 2 files changed, 177 insertions(+), 201 deletions(-)

diff --git a/drivers/scsi/libfc/fc_exch.c b/drivers/scsi/libfc/fc_exch.c
index c1c1574..c10afea 100644
--- a/drivers/scsi/libfc/fc_exch.c
+++ b/drivers/scsi/libfc/fc_exch.c
@@ -108,7 +108,6 @@ static void fc_seq_ls_rjt(struct fc_seq *, enum fc_els_rjt_reason,
 			  enum fc_els_rjt_explan);
 static void fc_exch_els_rec(struct fc_seq *, struct fc_frame *);
 static void fc_exch_els_rrq(struct fc_seq *, struct fc_frame *);
-static struct fc_seq *fc_seq_start_next_locked(struct fc_seq *sp);
 
 /*
  * Internal implementation notes.
@@ -273,7 +272,6 @@ static void fc_exch_setup_hdr(struct fc_exch *ep, struct fc_frame *fp,
 	fh->fh_seq_cnt = htons(ep->seq.cnt);
 }
 
-
 /*
  * Release a reference to an exchange.
  * If the refcnt goes to zero and the exchange is complete, it is freed.
@@ -373,7 +371,104 @@ static void fc_exch_timer_set(struct fc_exch *ep, unsigned int timer_msec)
 	spin_unlock_bh(&ep->ex_lock);
 }
 
-int fc_seq_exch_abort(const struct fc_seq *req_sp, unsigned int timer_msec)
+/**
+ * send a frame using existing sequence and exchange.
+ */
+static int fc_seq_send(struct fc_lport *lp, struct fc_seq *sp,
+		       struct fc_frame *fp)
+{
+	struct fc_exch *ep;
+	struct fc_frame_header *fh = fc_frame_header_get(fp);
+	int error;
+	u32	f_ctl;
+
+	ep = fc_seq_exch(sp);
+	WARN_ON((ep->esb_stat & ESB_ST_SEQ_INIT) != ESB_ST_SEQ_INIT);
+
+	f_ctl = ntoh24(fh->fh_f_ctl);
+	fc_exch_setup_hdr(ep, fp, f_ctl);
+
+	/*
+	 * update sequence count if this frame is carrying
+	 * multiple FC frames when sequence offload is enabled
+	 * by LLD.
+	 */
+	if (fr_max_payload(fp))
+		sp->cnt += DIV_ROUND_UP((fr_len(fp) - sizeof(*fh)),
+					fr_max_payload(fp));
+	else
+		sp->cnt++;
+
+	/*
+	 * Send the frame.
+	 */
+	error = lp->tt.frame_send(lp, fp);
+
+	/*
+	 * Update the exchange and sequence flags,
+	 * assuming all frames for the sequence have been sent.
+	 * We can only be called to send once for each sequence.
+	 */
+	spin_lock_bh(&ep->ex_lock);
+	ep->f_ctl = f_ctl & ~FC_FC_FIRST_SEQ;	/* not first seq */
+	if (f_ctl & (FC_FC_END_SEQ | FC_FC_SEQ_INIT))
+		ep->esb_stat &= ~ESB_ST_SEQ_INIT;
+	spin_unlock_bh(&ep->ex_lock);
+	return error;
+}
+
+/**
+ * fc_seq_alloc() - Allocate a sequence.
+ * @ep: Exchange pointer
+ * @seq_id: Sequence ID to allocate a sequence for
+ *
+ * We don't support multiple originated sequences on the same exchange.
+ * By implication, any previously originated sequence on this exchange
+ * is complete, and we reallocate the same sequence.
+ */
+static struct fc_seq *fc_seq_alloc(struct fc_exch *ep, u8 seq_id)
+{
+	struct fc_seq *sp;
+
+	sp = &ep->seq;
+	sp->ssb_stat = 0;
+	sp->cnt = 0;
+	sp->id = seq_id;
+	return sp;
+}
+
+static struct fc_seq *fc_seq_start_next_locked(struct fc_seq *sp)
+{
+	struct fc_exch *ep = fc_seq_exch(sp);
+
+	sp = fc_seq_alloc(ep, ep->seq_id++);
+	FC_EXCH_DBG(ep, "f_ctl %6x seq %2x\n",
+		    ep->f_ctl, sp->id);
+	return sp;
+}
+
+/**
+ * Allocate a new sequence on the same exchange as the supplied sequence.
+ * This will never return NULL.
+ */
+static struct fc_seq *fc_seq_start_next(struct fc_seq *sp)
+{
+	struct fc_exch *ep = fc_seq_exch(sp);
+
+	spin_lock_bh(&ep->ex_lock);
+	sp = fc_seq_start_next_locked(sp);
+	spin_unlock_bh(&ep->ex_lock);
+
+	return sp;
+}
+
+/**
+ * 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.
+ */
+static int fc_seq_exch_abort(const struct fc_seq *req_sp,
+			     unsigned int timer_msec)
 {
 	struct fc_seq *sp;
 	struct fc_exch *ep;
@@ -474,24 +569,6 @@ done:
 	fc_exch_release(ep);
 }
 
-/*
- * Allocate a sequence.
- *
- * We don't support multiple originated sequences on the same exchange.
- * By implication, any previously originated sequence on this exchange
- * is complete, and we reallocate the same sequence.
- */
-static struct fc_seq *fc_seq_alloc(struct fc_exch *ep, u8 seq_id)
-{
-	struct fc_seq *sp;
-
-	sp = &ep->seq;
-	sp->ssb_stat = 0;
-	sp->cnt = 0;
-	sp->id = seq_id;
-	return sp;
-}
-
 /**
  * fc_exch_em_alloc() - allocate an exchange from a specified EM.
  * @lport:	ptr to the local port
@@ -572,7 +649,8 @@ err:
  * EM is selected having either a NULL match function pointer
  * or call to match function returning true.
  */
-struct fc_exch *fc_exch_alloc(struct fc_lport *lport, struct fc_frame *fp)
+static struct fc_exch *fc_exch_alloc(struct fc_lport *lport,
+				     struct fc_frame *fp)
 {
 	struct fc_exch_mgr_anchor *ema;
 	struct fc_exch *ep;
@@ -586,7 +664,6 @@ struct fc_exch *fc_exch_alloc(struct fc_lport *lport, struct fc_frame *fp)
 	}
 	return NULL;
 }
-EXPORT_SYMBOL(fc_exch_alloc);
 
 /*
  * Lookup and hold an exchange.
@@ -609,7 +686,13 @@ static struct fc_exch *fc_exch_find(struct fc_exch_mgr *mp, u16 xid)
 	return ep;
 }
 
-void fc_exch_done(struct fc_seq *sp)
+
+/**
+ * fc_exch_done() - Indicate that an exchange/sequence tuple is complete and
+ *                  the memory allocated for the related objects may be freed.
+ * @sp: Sequence pointer
+ */
+static void fc_exch_done(struct fc_seq *sp)
 {
 	struct fc_exch *ep = fc_seq_exch(sp);
 	int rc;
@@ -620,7 +703,6 @@ void fc_exch_done(struct fc_seq *sp)
 	if (!rc)
 		fc_exch_delete(ep);
 }
-EXPORT_SYMBOL(fc_exch_done);
 
 /*
  * Allocate a new exchange as responder.
@@ -823,76 +905,15 @@ static void fc_exch_set_addr(struct fc_exch *ep,
 	}
 }
 
-static struct fc_seq *fc_seq_start_next_locked(struct fc_seq *sp)
-{
-	struct fc_exch *ep = fc_seq_exch(sp);
-
-	sp = fc_seq_alloc(ep, ep->seq_id++);
-	FC_EXCH_DBG(ep, "f_ctl %6x seq %2x\n",
-		    ep->f_ctl, sp->id);
-	return sp;
-}
-/*
- * Allocate a new sequence on the same exchange as the supplied sequence.
- * This will never return NULL.
+/**
+ * fc_seq_els_rsp_send() - Send ELS response using mainly infomation
+ *                         in exchange and sequence in EM layer.
+ * @sp: Sequence pointer
+ * @els_cmd: ELS command
+ * @els_data: ELS data
  */
-struct fc_seq *fc_seq_start_next(struct fc_seq *sp)
-{
-	struct fc_exch *ep = fc_seq_exch(sp);
-
-	spin_lock_bh(&ep->ex_lock);
-	sp = fc_seq_start_next_locked(sp);
-	spin_unlock_bh(&ep->ex_lock);
-
-	return sp;
-}
-EXPORT_SYMBOL(fc_seq_start_next);
-
-int fc_seq_send(struct fc_lport *lp, struct fc_seq *sp, struct fc_frame *fp)
-{
-	struct fc_exch *ep;
-	struct fc_frame_header *fh = fc_frame_header_get(fp);
-	int error;
-	u32	f_ctl;
-
-	ep = fc_seq_exch(sp);
-	WARN_ON((ep->esb_stat & ESB_ST_SEQ_INIT) != ESB_ST_SEQ_INIT);
-
-	f_ctl = ntoh24(fh->fh_f_ctl);
-	fc_exch_setup_hdr(ep, fp, f_ctl);
-
-	/*
-	 * update sequence count if this frame is carrying
-	 * multiple FC frames when sequence offload is enabled
-	 * by LLD.
-	 */
-	if (fr_max_payload(fp))
-		sp->cnt += DIV_ROUND_UP((fr_len(fp) - sizeof(*fh)),
-					fr_max_payload(fp));
-	else
-		sp->cnt++;
-
-	/*
-	 * Send the frame.
-	 */
-	error = lp->tt.frame_send(lp, fp);
-
-	/*
-	 * Update the exchange and sequence flags,
-	 * assuming all frames for the sequence have been sent.
-	 * We can only be called to send once for each sequence.
-	 */
-	spin_lock_bh(&ep->ex_lock);
-	ep->f_ctl = f_ctl & ~FC_FC_FIRST_SEQ;	/* not first seq */
-	if (f_ctl & (FC_FC_END_SEQ | FC_FC_SEQ_INIT))
-		ep->esb_stat &= ~ESB_ST_SEQ_INIT;
-	spin_unlock_bh(&ep->ex_lock);
-	return error;
-}
-EXPORT_SYMBOL(fc_seq_send);
-
-void fc_seq_els_rsp_send(struct fc_seq *sp, enum fc_els_cmd els_cmd,
-			 struct fc_seq_els_data *els_data)
+static void fc_seq_els_rsp_send(struct fc_seq *sp, enum fc_els_cmd els_cmd,
+				struct fc_seq_els_data *els_data)
 {
 	switch (els_cmd) {
 	case ELS_LS_RJT:
@@ -911,7 +932,6 @@ void fc_seq_els_rsp_send(struct fc_seq *sp, enum fc_els_cmd els_cmd,
 		FC_EXCH_DBG(fc_seq_exch(sp), "Invalid ELS CMD:%x\n", els_cmd);
 	}
 }
-EXPORT_SYMBOL(fc_seq_els_rsp_send);
 
 /*
  * Send a sequence, which is also the last sequence in the exchange.
@@ -1664,6 +1684,68 @@ cleanup:
 	fc_exch_release(aborted_ep);
 }
 
+
+/**
+ * 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.
+ */
+static struct fc_seq *fc_exch_seq_send(struct fc_lport *lp,
+				       struct fc_frame *fp,
+				       void (*resp)(struct fc_seq *,
+						    struct fc_frame *fp,
+						    void *arg),
+				       void (*destructor)(struct fc_seq *,
+							  void *),
+				       void *arg, u32 timer_msec)
+{
+	struct fc_exch *ep;
+	struct fc_seq *sp = NULL;
+	struct fc_frame_header *fh;
+	int rc = 1;
+
+	ep = fc_exch_alloc(lp, fp);
+	if (!ep) {
+		fc_frame_free(fp);
+		return NULL;
+	}
+	ep->esb_stat |= ESB_ST_SEQ_INIT;
+	fh = fc_frame_header_get(fp);
+	fc_exch_set_addr(ep, ntoh24(fh->fh_s_id), ntoh24(fh->fh_d_id));
+	ep->resp = resp;
+	ep->destructor = destructor;
+	ep->arg = arg;
+	ep->r_a_tov = FC_DEF_R_A_TOV;
+	ep->lp = lp;
+	sp = &ep->seq;
+
+	ep->fh_type = fh->fh_type; /* save for possbile timeout handling */
+	ep->f_ctl = ntoh24(fh->fh_f_ctl);
+	fc_exch_setup_hdr(ep, fp, ep->f_ctl);
+	sp->cnt++;
+
+	if (ep->xid <= lp->lro_xid)
+		fc_fcp_ddp_setup(fr_fsp(fp), ep->xid);
+
+	if (unlikely(lp->tt.frame_send(lp, fp)))
+		goto err;
+
+	if (timer_msec)
+		fc_exch_timer_set_locked(ep, timer_msec);
+	ep->f_ctl &= ~FC_FC_FIRST_SEQ;	/* not first seq */
+
+	if (ep->f_ctl & FC_FC_SEQ_INIT)
+		ep->esb_stat &= ~ESB_ST_SEQ_INIT;
+	spin_unlock_bh(&ep->ex_lock);
+	return sp;
+err:
+	rc = fc_exch_done_locked(ep);
+	spin_unlock_bh(&ep->ex_lock);
+	if (!rc)
+		fc_exch_delete(ep);
+	return NULL;
+}
+
 /*
  * Send ELS RRQ - Reinstate Recovery Qualifier.
  * This tells the remote port to stop blocking the use of
@@ -1903,63 +1985,6 @@ void fc_exch_mgr_free(struct fc_lport *lport)
 }
 EXPORT_SYMBOL(fc_exch_mgr_free);
 
-
-struct fc_seq *fc_exch_seq_send(struct fc_lport *lp,
-				struct fc_frame *fp,
-				void (*resp)(struct fc_seq *,
-					     struct fc_frame *fp,
-					     void *arg),
-				void (*destructor)(struct fc_seq *, void *),
-				void *arg, u32 timer_msec)
-{
-	struct fc_exch *ep;
-	struct fc_seq *sp = NULL;
-	struct fc_frame_header *fh;
-	int rc = 1;
-
-	ep = fc_exch_alloc(lp, fp);
-	if (!ep) {
-		fc_frame_free(fp);
-		return NULL;
-	}
-	ep->esb_stat |= ESB_ST_SEQ_INIT;
-	fh = fc_frame_header_get(fp);
-	fc_exch_set_addr(ep, ntoh24(fh->fh_s_id), ntoh24(fh->fh_d_id));
-	ep->resp = resp;
-	ep->destructor = destructor;
-	ep->arg = arg;
-	ep->r_a_tov = FC_DEF_R_A_TOV;
-	ep->lp = lp;
-	sp = &ep->seq;
-
-	ep->fh_type = fh->fh_type; /* save for possbile timeout handling */
-	ep->f_ctl = ntoh24(fh->fh_f_ctl);
-	fc_exch_setup_hdr(ep, fp, ep->f_ctl);
-	sp->cnt++;
-
-	if (ep->xid <= lp->lro_xid)
-		fc_fcp_ddp_setup(fr_fsp(fp), ep->xid);
-
-	if (unlikely(lp->tt.frame_send(lp, fp)))
-		goto err;
-
-	if (timer_msec)
-		fc_exch_timer_set_locked(ep, timer_msec);
-	ep->f_ctl &= ~FC_FC_FIRST_SEQ;	/* not first seq */
-
-	if (ep->f_ctl & FC_FC_SEQ_INIT)
-		ep->esb_stat &= ~ESB_ST_SEQ_INIT;
-	spin_unlock_bh(&ep->ex_lock);
-	return sp;
-err:
-	rc = fc_exch_done_locked(ep);
-	spin_unlock_bh(&ep->ex_lock);
-	if (!rc)
-		fc_exch_delete(ep);
-	return NULL;
-}
-EXPORT_SYMBOL(fc_exch_seq_send);
-
 /*
  * Receive a frame
  */
diff --git a/include/scsi/libfc.h b/include/scsi/libfc.h
index 9874ea7..2944cd2 100644
--- a/include/scsi/libfc.h
+++ b/include/scsi/libfc.h
@@ -1012,55 +1012,6 @@ void fc_exch_mgr_free(struct fc_lport *lport);
 void fc_exch_recv(struct fc_lport *lp, 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);
-
-/*
- * Allocate a new exchange and sequence pair.
- */
-struct fc_exch *fc_exch_alloc(struct fc_lport *lport, struct fc_frame *fp);
-/*
- * Start a new sequence on the same exchange as the supplied sequence.
- */
-struct fc_seq *fc_seq_start_next(struct fc_seq *sp);
-
-
-/*
  * Reset all EMs of a lport, releasing its all sequences and
  * exchanges. If sid is non-zero, then reset only exchanges
  * we sourced from that FID. If did is non-zero, reset only

[PATCH 04/35] libfc: Remove fc_fcp_complete

[Robert Love]

This function is never used, let's remove it.

Signed-off-by: Robert Love <robert.w.love@intel.com>
---

 drivers/scsi/libfc/fc_fcp.c |   17 -----------------
 include/scsi/libfc.h        |    8 --------
 2 files changed, 0 insertions(+), 25 deletions(-)

diff --git a/drivers/scsi/libfc/fc_fcp.c b/drivers/scsi/libfc/fc_fcp.c
index a78db76..baa097a 100644
--- a/drivers/scsi/libfc/fc_fcp.c
+++ b/drivers/scsi/libfc/fc_fcp.c
@@ -1873,23 +1873,6 @@ static void fc_io_compl(struct fc_fcp_pkt *fsp)
 }
 
 /**
- * fc_fcp_complete() - complete processing of a fcp packet
- * @fsp:	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)
-{
-	if (fc_fcp_lock_pkt(fsp))
-		return;
-
-	fc_fcp_complete_locked(fsp);
-	fc_fcp_unlock_pkt(fsp);
-}
-EXPORT_SYMBOL(fc_fcp_complete);
-
-/**
  * fc_eh_abort() - Abort a command
  * @sc_cmd:	scsi command to abort
  *
diff --git a/include/scsi/libfc.h b/include/scsi/libfc.h
index 2944cd2..04b9d49 100644
--- a/include/scsi/libfc.h
+++ b/include/scsi/libfc.h
@@ -888,14 +888,6 @@ 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.
  */

[PATCH 05/35] libfc: Add libfc/fc_libfc.[ch] for libfc internal routines

[Robert Love]

include/scsi/libfc.h is currently loaded with common code
shared between libfc's sub-modules as well as shared between
libfc and fcoe. Previous patches attempted to move out
non-common code. This patch creates two files for common
libfc routines that will not be shared with fcoe, fnic or
any other LLDs.

Signed-off-by: Robert Love <robert.w.love@intel.com>
---

 drivers/scsi/libfc/Makefile   |    1 
 drivers/scsi/libfc/fc_disc.c  |    2 +
 drivers/scsi/libfc/fc_exch.c  |    2 +
 drivers/scsi/libfc/fc_fcp.c   |    8 ---
 drivers/scsi/libfc/fc_libfc.c |   35 ++++++++++++++
 drivers/scsi/libfc/fc_libfc.h |  102 +++++++++++++++++++++++++++++++++++++++++
 drivers/scsi/libfc/fc_lport.c |    2 +
 drivers/scsi/libfc/fc_rport.c |    2 +
 include/scsi/libfc.h          |   79 --------------------------------
 9 files changed, 147 insertions(+), 86 deletions(-)
 create mode 100644 drivers/scsi/libfc/fc_libfc.c
 create mode 100644 drivers/scsi/libfc/fc_libfc.h

diff --git a/drivers/scsi/libfc/Makefile b/drivers/scsi/libfc/Makefile
index 55f982d..2be549c 100644
--- a/drivers/scsi/libfc/Makefile
+++ b/drivers/scsi/libfc/Makefile
@@ -3,6 +3,7 @@
 obj-$(CONFIG_LIBFC) += libfc.o
 
 libfc-objs := \
+	fc_libfc.o \
 	fc_disc.o \
 	fc_exch.o \
 	fc_elsct.o \
diff --git a/drivers/scsi/libfc/fc_disc.c b/drivers/scsi/libfc/fc_disc.c
index c48799e..c42bf90 100644
--- a/drivers/scsi/libfc/fc_disc.c
+++ b/drivers/scsi/libfc/fc_disc.c
@@ -40,6 +40,8 @@
 
 #include <scsi/libfc.h>
 
+#include "fc_libfc.h"
+
 #define FC_DISC_RETRY_LIMIT	3	/* max retries */
 #define FC_DISC_RETRY_DELAY	500UL	/* (msecs) delay */
 
diff --git a/drivers/scsi/libfc/fc_exch.c b/drivers/scsi/libfc/fc_exch.c
index c10afea..5e43f79 100644
--- a/drivers/scsi/libfc/fc_exch.c
+++ b/drivers/scsi/libfc/fc_exch.c
@@ -32,6 +32,8 @@
 #include <scsi/libfc.h>
 #include <scsi/fc_encode.h>
 
+#include "fc_libfc.h"
+
 u16	fc_cpu_mask;		/* cpu mask for possible cpus */
 EXPORT_SYMBOL(fc_cpu_mask);
 static u16	fc_cpu_order;	/* 2's power to represent total possible cpus */
diff --git a/drivers/scsi/libfc/fc_fcp.c b/drivers/scsi/libfc/fc_fcp.c
index baa097a..5cd81ff 100644
--- a/drivers/scsi/libfc/fc_fcp.c
+++ b/drivers/scsi/libfc/fc_fcp.c
@@ -39,13 +39,7 @@
 #include <scsi/libfc.h>
 #include <scsi/fc_encode.h>
 
-MODULE_AUTHOR("Open-FCoE.org");
-MODULE_DESCRIPTION("libfc");
-MODULE_LICENSE("GPL v2");
-
-unsigned int fc_debug_logging;
-module_param_named(debug_logging, fc_debug_logging, int, S_IRUGO|S_IWUSR);
-MODULE_PARM_DESC(debug_logging, "a bit mask of logging levels");
+#include "fc_libfc.h"
 
 static struct kmem_cache *scsi_pkt_cachep;
 
diff --git a/drivers/scsi/libfc/fc_libfc.c b/drivers/scsi/libfc/fc_libfc.c
new file mode 100644
index 0000000..e64ea87
--- /dev/null
+++ b/drivers/scsi/libfc/fc_libfc.c
@@ -0,0 +1,35 @@
+/*
+ * Copyright(c) 2009 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
+ */
+
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/scatterlist.h>
+#include <linux/crc32.h>
+
+#include <scsi/libfc.h>
+
+#include "fc_libfc.h"
+
+MODULE_AUTHOR("Open-FCoE.org");
+MODULE_DESCRIPTION("libfc");
+MODULE_LICENSE("GPL v2");
+
+unsigned int fc_debug_logging;
+module_param_named(debug_logging, fc_debug_logging, int, S_IRUGO|S_IWUSR);
+MODULE_PARM_DESC(debug_logging, "a bit mask of logging levels");
diff --git a/drivers/scsi/libfc/fc_libfc.h b/drivers/scsi/libfc/fc_libfc.h
new file mode 100644
index 0000000..388fae4
--- /dev/null
+++ b/drivers/scsi/libfc/fc_libfc.h
@@ -0,0 +1,102 @@
+/*
+ * Copyright(c) 2009 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_LIBFC_H_
+#define _FC_LIBFC_H_
+
+#define FC_LIBFC_LOGGING 0x01 /* General logging, not categorized */
+#define FC_LPORT_LOGGING 0x02 /* lport layer logging */
+#define FC_DISC_LOGGING  0x04 /* discovery layer logging */
+#define FC_RPORT_LOGGING 0x08 /* rport layer logging */
+#define FC_FCP_LOGGING   0x10 /* I/O path logging */
+#define FC_EM_LOGGING    0x20 /* Exchange Manager logging */
+#define FC_EXCH_LOGGING  0x40 /* Exchange/Sequence logging */
+#define FC_SCSI_LOGGING  0x80 /* SCSI logging (mostly error handling) */
+
+extern unsigned int fc_debug_logging;
+
+#define FC_CHECK_LOGGING(LEVEL, CMD)				\
+do {								\
+	if (unlikely(fc_debug_logging & LEVEL))			\
+		do {						\
+			CMD;					\
+		} while (0);					\
+} while (0)
+
+#define FC_LIBFC_DBG(fmt, args...)					\
+	FC_CHECK_LOGGING(FC_LIBFC_LOGGING,				\
+			 printk(KERN_INFO "libfc: " fmt, ##args))
+
+#define FC_LPORT_DBG(lport, fmt, args...)				\
+	FC_CHECK_LOGGING(FC_LPORT_LOGGING,				\
+			 printk(KERN_INFO "host%u: lport %6x: " fmt,	\
+				(lport)->host->host_no,			\
+				fc_host_port_id((lport)->host), ##args))
+
+#define FC_DISC_DBG(disc, fmt, args...)					\
+	FC_CHECK_LOGGING(FC_DISC_LOGGING,				\
+			 printk(KERN_INFO "host%u: disc: " fmt,		\
+				(disc)->lport->host->host_no,		\
+				##args))
+
+#define FC_RPORT_ID_DBG(lport, port_id, fmt, args...)			\
+	FC_CHECK_LOGGING(FC_RPORT_LOGGING,				\
+			 printk(KERN_INFO "host%u: rport %6x: " fmt,	\
+				(lport)->host->host_no,			\
+				(port_id), ##args))
+
+#define FC_RPORT_DBG(rdata, fmt, args...)				\
+	FC_RPORT_ID_DBG((rdata)->local_port, (rdata)->ids.port_id, fmt, ##args)
+
+#define FC_FCP_DBG(pkt, fmt, args...)					\
+	FC_CHECK_LOGGING(FC_FCP_LOGGING,				\
+			 printk(KERN_INFO "host%u: fcp: %6x: " fmt,	\
+				(pkt)->lp->host->host_no,		\
+				pkt->rport->port_id, ##args))
+
+#define FC_EXCH_DBG(exch, fmt, args...)					\
+	FC_CHECK_LOGGING(FC_EXCH_LOGGING,				\
+			 printk(KERN_INFO "host%u: xid %4x: " fmt,	\
+				(exch)->lp->host->host_no,		\
+				exch->xid, ##args))
+
+#define FC_SCSI_DBG(lport, fmt, args...)				\
+	FC_CHECK_LOGGING(FC_SCSI_LOGGING,                               \
+			 printk(KERN_INFO "host%u: scsi: " fmt,		\
+				(lport)->host->host_no,	##args))
+
+/*
+ * Set up direct-data placement for this I/O request
+ */
+void fc_fcp_ddp_setup(struct fc_fcp_pkt *fsp, u16 xid);
+
+/*
+ * 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);
+
+/*
+ * Internal libfc functions
+ */
+const char *fc_els_resp_type(struct fc_frame *);
+
+#endif /* _FC_LIBFC_H_ */
diff --git a/drivers/scsi/libfc/fc_lport.c b/drivers/scsi/libfc/fc_lport.c
index bd2f771..646dee1 100644
--- a/drivers/scsi/libfc/fc_lport.c
+++ b/drivers/scsi/libfc/fc_lport.c
@@ -95,6 +95,8 @@
 #include <scsi/libfc.h>
 #include <scsi/fc_encode.h>
 
+#include "fc_libfc.h"
+
 /* Fabric IDs to use for point-to-point mode, chosen on whims. */
 #define FC_LOCAL_PTP_FID_LO   0x010101
 #define FC_LOCAL_PTP_FID_HI   0x010102
diff --git a/drivers/scsi/libfc/fc_rport.c b/drivers/scsi/libfc/fc_rport.c
index bdc9732..bf42a98 100644
--- a/drivers/scsi/libfc/fc_rport.c
+++ b/drivers/scsi/libfc/fc_rport.c
@@ -55,6 +55,8 @@
 #include <scsi/libfc.h>
 #include <scsi/fc_encode.h>
 
+#include "fc_libfc.h"
+
 struct workqueue_struct *rport_event_queue;
 
 static void fc_rport_enter_plogi(struct fc_rport_priv *);
diff --git a/include/scsi/libfc.h b/include/scsi/libfc.h
index 04b9d49..81901fa 100644
--- a/include/scsi/libfc.h
+++ b/include/scsi/libfc.h
@@ -34,67 +34,6 @@
 
 #include <scsi/fc_frame.h>
 
-#define FC_LIBFC_LOGGING 0x01 /* General logging, not categorized */
-#define FC_LPORT_LOGGING 0x02 /* lport layer logging */
-#define FC_DISC_LOGGING  0x04 /* discovery layer logging */
-#define FC_RPORT_LOGGING 0x08 /* rport layer logging */
-#define FC_FCP_LOGGING   0x10 /* I/O path logging */
-#define FC_EM_LOGGING    0x20 /* Exchange Manager logging */
-#define FC_EXCH_LOGGING  0x40 /* Exchange/Sequence logging */
-#define FC_SCSI_LOGGING  0x80 /* SCSI logging (mostly error handling) */
-
-extern unsigned int fc_debug_logging;
-
-#define FC_CHECK_LOGGING(LEVEL, CMD)				\
-do {								\
-	if (unlikely(fc_debug_logging & LEVEL))			\
-		do {						\
-			CMD;					\
-		} while (0);					\
-} while (0)
-
-#define FC_LIBFC_DBG(fmt, args...)					\
-	FC_CHECK_LOGGING(FC_LIBFC_LOGGING,				\
-			 printk(KERN_INFO "libfc: " fmt, ##args))
-
-#define FC_LPORT_DBG(lport, fmt, args...)				\
-	FC_CHECK_LOGGING(FC_LPORT_LOGGING,				\
-			 printk(KERN_INFO "host%u: lport %6x: " fmt,	\
-				(lport)->host->host_no,			\
-				fc_host_port_id((lport)->host), ##args))
-
-#define FC_DISC_DBG(disc, fmt, args...)					\
-	FC_CHECK_LOGGING(FC_DISC_LOGGING,				\
-			 printk(KERN_INFO "host%u: disc: " fmt,		\
-				(disc)->lport->host->host_no,		\
-				##args))
-
-#define FC_RPORT_ID_DBG(lport, port_id, fmt, args...)			\
-	FC_CHECK_LOGGING(FC_RPORT_LOGGING,				\
-			 printk(KERN_INFO "host%u: rport %6x: " fmt,	\
-				(lport)->host->host_no,			\
-				(port_id), ##args))
-
-#define FC_RPORT_DBG(rdata, fmt, args...)				\
-	FC_RPORT_ID_DBG((rdata)->local_port, (rdata)->ids.port_id, fmt, ##args)
-
-#define FC_FCP_DBG(pkt, fmt, args...)					\
-	FC_CHECK_LOGGING(FC_FCP_LOGGING,				\
-			 printk(KERN_INFO "host%u: fcp: %6x: " fmt,	\
-				(pkt)->lp->host->host_no,		\
-				pkt->rport->port_id, ##args))
-
-#define FC_EXCH_DBG(exch, fmt, args...)					\
-	FC_CHECK_LOGGING(FC_EXCH_LOGGING,				\
-			 printk(KERN_INFO "host%u: xid %4x: " fmt,	\
-				(exch)->lp->host->host_no,		\
-				exch->xid, ##args))
-
-#define FC_SCSI_DBG(lport, fmt, args...)				\
-	FC_CHECK_LOGGING(FC_SCSI_LOGGING,                               \
-			 printk(KERN_INFO "host%u: scsi: " fmt,		\
-				(lport)->host->host_no,	##args))
-
 /*
  * libfc error codes
  */
@@ -924,11 +863,6 @@ int fc_change_queue_type(struct scsi_device *sdev, int tag_type);
 void fc_fcp_destroy(struct fc_lport *);
 
 /*
- * Set up direct-data placement for this I/O request
- */
-void fc_fcp_ddp_setup(struct fc_fcp_pkt *fsp, u16 xid);
-
-/*
  * ELS/CT interface
  *****************************/
 /*
@@ -1020,17 +954,4 @@ 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);
-
-/*
- * Internal libfc functions.
- */
-const char *fc_els_resp_type(struct fc_frame *);
-
 #endif /* _LIBFC_H_ */

[PATCH 06/35] libfc: Move libfc_init and libfc_exit to fc_libfc.c

[Robert Love]

These routines are for the libfc kernel module and should be in
the libfc .c file.

Moving the libfc __init routine into fc_libfc.c caused the creation
of the fc_setup_fcp() and fc_destroy_fcp() routines so that
scsi_pkt_cachep was not exposed outside of fc_fcp.c.

Signed-off-by: Robert Love <robert.w.love@intel.com>
---

 drivers/scsi/libfc/fc_fcp.c   |   63 +++++++++++++++--------------------------
 drivers/scsi/libfc/fc_libfc.c |   39 +++++++++++++++++++++++++
 drivers/scsi/libfc/fc_libfc.h |    2 +
 3 files changed, 64 insertions(+), 40 deletions(-)

diff --git a/drivers/scsi/libfc/fc_fcp.c b/drivers/scsi/libfc/fc_fcp.c
index 5cd81ff..389c9d5 100644
--- a/drivers/scsi/libfc/fc_fcp.c
+++ b/drivers/scsi/libfc/fc_fcp.c
@@ -41,7 +41,7 @@
 
 #include "fc_libfc.h"
 
-static struct kmem_cache *scsi_pkt_cachep;
+struct kmem_cache *scsi_pkt_cachep;
 
 /* SRB state definitions */
 #define FC_SRB_FREE		0		/* cmd is free */
@@ -2072,6 +2072,28 @@ void fc_fcp_destroy(struct fc_lport *lp)
 }
 EXPORT_SYMBOL(fc_fcp_destroy);
 
+int fc_setup_fcp()
+{
+	int rc = 0;
+
+	scsi_pkt_cachep = kmem_cache_create("libfc_fcp_pkt",
+					    sizeof(struct fc_fcp_pkt),
+					    0, SLAB_HWCACHE_ALIGN, NULL);
+	if (!scsi_pkt_cachep) {
+		printk(KERN_ERR "libfc: Unable to allocate SRB cache, "
+		       "module load failed!");
+		rc = -ENOMEM;
+	}
+
+	return rc;
+}
+
+void fc_destroy_fcp()
+{
+	if (scsi_pkt_cachep)
+		kmem_cache_destroy(scsi_pkt_cachep);
+}
+
 int fc_fcp_init(struct fc_lport *lp)
 {
 	int rc;
@@ -2104,42 +2126,3 @@ free_internal:
 	return rc;
 }
 EXPORT_SYMBOL(fc_fcp_init);
-
-static int __init libfc_init(void)
-{
-	int rc;
-
-	scsi_pkt_cachep = kmem_cache_create("libfc_fcp_pkt",
-					    sizeof(struct fc_fcp_pkt),
-					    0, SLAB_HWCACHE_ALIGN, NULL);
-	if (scsi_pkt_cachep == NULL) {
-		printk(KERN_ERR "libfc: Unable to allocate SRB cache, "
-		       "module load failed!");
-		return -ENOMEM;
-	}
-
-	rc = fc_setup_exch_mgr();
-	if (rc)
-		goto destroy_pkt_cache;
-
-	rc = fc_setup_rport();
-	if (rc)
-		goto destroy_em;
-
-	return rc;
-destroy_em:
-	fc_destroy_exch_mgr();
-destroy_pkt_cache:
-	kmem_cache_destroy(scsi_pkt_cachep);
-	return rc;
-}
-
-static void __exit libfc_exit(void)
-{
-	kmem_cache_destroy(scsi_pkt_cachep);
-	fc_destroy_exch_mgr();
-	fc_destroy_rport();
-}
-
-module_init(libfc_init);
-module_exit(libfc_exit);
diff --git a/drivers/scsi/libfc/fc_libfc.c b/drivers/scsi/libfc/fc_libfc.c
index e64ea87..01418ae 100644
--- a/drivers/scsi/libfc/fc_libfc.c
+++ b/drivers/scsi/libfc/fc_libfc.c
@@ -33,3 +33,42 @@ MODULE_LICENSE("GPL v2");
 unsigned int fc_debug_logging;
 module_param_named(debug_logging, fc_debug_logging, int, S_IRUGO|S_IWUSR);
 MODULE_PARM_DESC(debug_logging, "a bit mask of logging levels");
+
+/**
+ * libfc_init() - Initialize libfc.ko
+ */
+static int __init libfc_init(void)
+{
+	int rc = 0;
+
+	rc = fc_setup_fcp();
+	if (rc)
+		return rc;
+
+	rc = fc_setup_exch_mgr();
+	if (rc)
+		goto destroy_pkt_cache;
+
+	rc = fc_setup_rport();
+	if (rc)
+		goto destroy_em;
+
+	return rc;
+destroy_em:
+	fc_destroy_exch_mgr();
+destroy_pkt_cache:
+	fc_destroy_fcp();
+	return rc;
+}
+module_init(libfc_init);
+
+/**
+ * libfc_exit() - Tear down libfc.ko
+ */
+static void __exit libfc_exit(void)
+{
+	fc_destroy_fcp();
+	fc_destroy_exch_mgr();
+	fc_destroy_rport();
+}
+module_exit(libfc_exit);
diff --git a/drivers/scsi/libfc/fc_libfc.h b/drivers/scsi/libfc/fc_libfc.h
index 388fae4..0530149 100644
--- a/drivers/scsi/libfc/fc_libfc.h
+++ b/drivers/scsi/libfc/fc_libfc.h
@@ -93,6 +93,8 @@ int fc_setup_exch_mgr(void);
 void fc_destroy_exch_mgr(void);
 int fc_setup_rport(void);
 void fc_destroy_rport(void);
+int fc_setup_fcp(void);
+void fc_destroy_fcp(void);
 
 /*
  * Internal libfc functions

[PATCH 07/35] libfc: fix ddp in fc_fcp for 0 xid

[Robert Love]

From: Yi Zou <yi.zou@intel.com>

xid 0 was used as an indication of invalid xid before but now xid 0
can be used as a valid exchange i. This patch fixes the ddp completion
in fcp layer, i.e., in fc_fcp.c:fc_fcp_ddp_done() function, to make sure it
does not use xid 0 for indication of an invalid xid, instead, it now
uses use FC_XID_UNKNOWN for such indication.

Signed-off-by: Yi Zou <yi.zou@intel.com>
Signed-off-by: Robert Love <robert.w.love@intel.com>
---

 drivers/scsi/libfc/fc_fcp.c |    8 ++++++--
 1 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/scsi/libfc/fc_fcp.c b/drivers/scsi/libfc/fc_fcp.c
index 389c9d5..aa3eafd 100644
--- a/drivers/scsi/libfc/fc_fcp.c
+++ b/drivers/scsi/libfc/fc_fcp.c
@@ -296,10 +296,13 @@ static void fc_fcp_ddp_done(struct fc_fcp_pkt *fsp)
 	if (!fsp)
 		return;
 
+	if (fsp->xfer_ddp == FC_XID_UNKNOWN)
+		return;
+
 	lp = fsp->lp;
-	if (fsp->xfer_ddp && lp->tt.ddp_done) {
+	if (lp->tt.ddp_done) {
 		fsp->xfer_len = lp->tt.ddp_done(lp, fsp->xfer_ddp);
-		fsp->xfer_ddp = 0;
+		fsp->xfer_ddp = FC_XID_UNKNOWN;
 	}
 }
 
@@ -1702,6 +1705,7 @@ int fc_queuecommand(struct scsi_cmnd *sc_cmd, void (*done)(struct scsi_cmnd *))
 	fsp->cmd = sc_cmd;	/* save the cmd */
 	fsp->lp = lp;		/* save the softc ptr */
 	fsp->rport = rport;	/* set the remote port ptr */
+	fsp->xfer_ddp = FC_XID_UNKNOWN;
 	sc_cmd->scsi_done = done;
 
 	/*

[PATCH 08/35] fcoe: remove redundant checking of netdev->netdev_ops

[Robert Love]

From: Yi Zou <yi.zou@intel.com>

Remove the redundant checking of netdev->netdev_ops as it will never be NULL.

Signed-off-by: Yi Zou <yi.zou@intel.com>
Signed-off-by: Robert Love <robert.w.love@intel.com>
---

 drivers/scsi/fcoe/fcoe.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/scsi/fcoe/fcoe.c b/drivers/scsi/fcoe/fcoe.c
index 64fd867..c8dd228 100644
--- a/drivers/scsi/fcoe/fcoe.c
+++ b/drivers/scsi/fcoe/fcoe.c
@@ -664,7 +664,7 @@ static int fcoe_ddp_setup(struct fc_lport *lp, u16 xid,
 {
 	struct net_device *n = fcoe_netdev(lp);
 
-	if (n->netdev_ops && n->netdev_ops->ndo_fcoe_ddp_setup)
+	if (n->netdev_ops->ndo_fcoe_ddp_setup)
 		return n->netdev_ops->ndo_fcoe_ddp_setup(n, xid, sgl, sgc);
 
 	return 0;
@@ -681,7 +681,7 @@ static int fcoe_ddp_done(struct fc_lport *lp, u16 xid)
 {
 	struct net_device *n = fcoe_netdev(lp);
 
-	if (n->netdev_ops && n->netdev_ops->ndo_fcoe_ddp_done)
+	if (n->netdev_ops->ndo_fcoe_ddp_done)
 		return n->netdev_ops->ndo_fcoe_ddp_done(n, xid);
 	return 0;
 }

[PATCH 09/35] libfc, fcoe: fixes for highmem skb linearize panics

[Robert Love]

From: Chris Leech <christopher.leech@intel.com>

There are cases outside of our control that may result in a transmit
skb being linearized in dev_queue_xmit.  There are a couple of bugs
in libfc/fcoe that can result in a panic at that point.  This patch
contains two fixes to prevent those panics.

1) use fast cloning instead of shared skbs with dev_queue_xmit

dev_queue_xmit doen't want shared skbuffs being passed in, and
__skb_linearize will BUG if the skb is shared.  FCoE is holding an extra
reference around the call to dev_queue_xmit, so that when it returns an
error code indicating the frame has been dropped it can maintain it's
own backlog and retransmit.  Switch to using fast skb cloning for this
instead.

2) don't append compound pages as > PAGE_SIZE skb fragments

fc_fcp_send_data will append pages from a scatterlist to the nr_frags[]
if the netdev supports it.  But, it's using > PAGE_SIZE compound pages
as a single skb_frag.  In the highmem linearize case that page will be
passed to kmap_atomic to get a mapping to copy out of, but
kmap_atomic will only allow access to the first PAGE_SIZE part.
The memcpy will keep going and cause a page fault once is crosses the
first boundary.

If fc_fcp_send_data uses linear buffers from the start, it calls
kmap_atomic one PAGE_SIZE at a time.  That same logic needs to be
applied when setting up skb_frags.

Signed-off-by: Chris Leech <christopher.leech@intel.com>
Signed-off-by: Robert Love <robert.w.love@intel.com>
---

 drivers/scsi/fcoe/fcoe.c      |    5 +++--
 drivers/scsi/libfc/fc_fcp.c   |   20 ++++++++++----------
 drivers/scsi/libfc/fc_frame.c |    5 +++--
 3 files changed, 16 insertions(+), 14 deletions(-)

diff --git a/drivers/scsi/fcoe/fcoe.c b/drivers/scsi/fcoe/fcoe.c
index c8dd228..6926ed7 100644
--- a/drivers/scsi/fcoe/fcoe.c
+++ b/drivers/scsi/fcoe/fcoe.c
@@ -1084,10 +1084,11 @@ err2:
  */
 static inline int fcoe_start_io(struct sk_buff *skb)
 {
+	struct sk_buff *nskb;
 	int rc;
 
-	skb_get(skb);
-	rc = dev_queue_xmit(skb);
+	nskb = skb_clone(skb, GFP_ATOMIC);
+	rc = dev_queue_xmit(nskb);
 	if (rc != 0)
 		return rc;
 	kfree_skb(skb);
diff --git a/drivers/scsi/libfc/fc_fcp.c b/drivers/scsi/libfc/fc_fcp.c
index aa3eafd..e4ff27e 100644
--- a/drivers/scsi/libfc/fc_fcp.c
+++ b/drivers/scsi/libfc/fc_fcp.c
@@ -455,11 +455,13 @@ static int fc_fcp_send_data(struct fc_fcp_pkt *fsp, struct fc_seq *seq,
 	struct scatterlist *sg;
 	struct fc_frame *fp = NULL;
 	struct fc_lport *lp = fsp->lp;
+	struct page *page;
 	size_t remaining;
 	size_t t_blen;
 	size_t tlen;
 	size_t sg_bytes;
 	size_t frame_offset, fh_parm_offset;
+	size_t off;
 	int error;
 	void *data = NULL;
 	void *page_addr;
@@ -537,28 +539,26 @@ static int fc_fcp_send_data(struct fc_fcp_pkt *fsp, struct fc_seq *seq,
 			fh_parm_offset = frame_offset;
 			fr_max_payload(fp) = fsp->max_payload;
 		}
+
+		off = offset + sg->offset;
 		sg_bytes = min(tlen, sg->length - offset);
+		sg_bytes = min(sg_bytes,
+			       (size_t) (PAGE_SIZE - (off & ~PAGE_MASK)));
+		page = sg_page(sg) + (off >> PAGE_SHIFT);
 		if (using_sg) {
-			get_page(sg_page(sg));
+			get_page(page);
 			skb_fill_page_desc(fp_skb(fp),
 					   skb_shinfo(fp_skb(fp))->nr_frags,
-					   sg_page(sg), sg->offset + offset,
-					   sg_bytes);
+					   page, off & ~PAGE_MASK, sg_bytes);
 			fp_skb(fp)->data_len += sg_bytes;
 			fr_len(fp) += sg_bytes;
 			fp_skb(fp)->truesize += PAGE_SIZE;
 		} else {
-			size_t off = offset + sg->offset;
-
 			/*
 			 * The scatterlist item may be bigger than PAGE_SIZE,
 			 * but we must not cross pages inside the kmap.
 			 */
-			sg_bytes = min(sg_bytes, (size_t) (PAGE_SIZE -
-							   (off & ~PAGE_MASK)));
-			page_addr = kmap_atomic(sg_page(sg) +
-						(off >> PAGE_SHIFT),
-						KM_SOFTIRQ0);
+			page_addr = kmap_atomic(page, KM_SOFTIRQ0);
 			memcpy(data, (char *)page_addr + (off & ~PAGE_MASK),
 			       sg_bytes);
 			kunmap_atomic(page_addr, KM_SOFTIRQ0);
diff --git a/drivers/scsi/libfc/fc_frame.c b/drivers/scsi/libfc/fc_frame.c
index 63fe00c..5b9c977 100644
--- a/drivers/scsi/libfc/fc_frame.c
+++ b/drivers/scsi/libfc/fc_frame.c
@@ -58,12 +58,13 @@ struct fc_frame *__fc_frame_alloc(size_t len)
 
 	WARN_ON((len % sizeof(u32)) != 0);
 	len += sizeof(struct fc_frame_header);
-	skb = dev_alloc_skb(len + FC_FRAME_HEADROOM + FC_FRAME_TAILROOM);
+	skb = alloc_skb_fclone(len + FC_FRAME_HEADROOM + FC_FRAME_TAILROOM +
+			       NET_SKB_PAD, GFP_ATOMIC);
 	if (!skb)
 		return NULL;
+	skb_reserve(skb, NET_SKB_PAD + FC_FRAME_HEADROOM);
 	fp = (struct fc_frame *) skb;
 	fc_frame_init(fp);
-	skb_reserve(skb, FC_FRAME_HEADROOM);
 	skb_put(skb, len);
 	return fp;
 }

[PATCH 10/35] libfc: changes to libfc_host_alloc to consolidate initialization with allocation

[Robert Love]

From: Chris Leech <christopher.leech@intel.com>

I'd like to keep basic initialization together with allocation, which means
this can't just be a tail-call to scsi_host_alloc.

This is needed to create a generic libfc host allocation routine for NPIV
VN_Ports, which will share the exchange ID space (through sharing exchange
manager structures) with the parent lport.  In order to clone the exchange
manager list when the lport is allocated, the list head must be initialized
earlier.

Also, update fnic to use the libfc_host_alloc so that later changes do not break
it. (contribution by Joe Eykholt)

Signed-off-by: Chris Leech <christopher.leech@intel.com>
Signed-off-by: Joe Eykholt <jeykholt@cisco.com>
Signed-off-by: Robert Love <robert.w.love@intel.com>
---

 drivers/scsi/fcoe/fcoe.c      |    8 +++-----
 drivers/scsi/fnic/fnic_main.c |   10 ++++------
 drivers/scsi/libfc/fc_lport.c |    1 -
 include/scsi/libfc.h          |   15 ++++++++++++---
 4 files changed, 19 insertions(+), 15 deletions(-)

diff --git a/drivers/scsi/fcoe/fcoe.c b/drivers/scsi/fcoe/fcoe.c
index 6926ed7..a0e27e3 100644
--- a/drivers/scsi/fcoe/fcoe.c
+++ b/drivers/scsi/fcoe/fcoe.c
@@ -493,8 +493,6 @@ static int fcoe_shost_config(struct fc_lport *lp, struct Scsi_Host *shost,
 	int rc = 0;
 
 	/* lport scsi host config */
-	lp->host = shost;
-
 	lp->host->max_lun = FCOE_MAX_LUN;
 	lp->host->max_id = FCOE_MAX_FCP_TARGET;
 	lp->host->max_channel = 0;
@@ -712,14 +710,14 @@ static struct fc_lport *fcoe_if_create(struct fcoe_interface *fcoe,
 
 	FCOE_NETDEV_DBG(netdev, "Create Interface\n");
 
-	shost = libfc_host_alloc(&fcoe_shost_template,
+	lport = libfc_host_alloc(&fcoe_shost_template,
 				 sizeof(struct fcoe_port));
-	if (!shost) {
+	if (!lport) {
 		FCOE_NETDEV_DBG(netdev, "Could not allocate host structure\n");
 		rc = -ENOMEM;
 		goto out;
 	}
-	lport = shost_priv(shost);
+	shost = lport->host;
 	port = lport_priv(lport);
 	port->lport = lport;
 	port->fcoe = fcoe;
diff --git a/drivers/scsi/fnic/fnic_main.c b/drivers/scsi/fnic/fnic_main.c
index 71c7bbe..bfc341c 100644
--- a/drivers/scsi/fnic/fnic_main.c
+++ b/drivers/scsi/fnic/fnic_main.c
@@ -424,15 +424,13 @@ static int __devinit fnic_probe(struct pci_dev *pdev,
 	 * Allocate SCSI Host and set up association between host,
 	 * local port, and fnic
 	 */
-	host = scsi_host_alloc(&fnic_host_template,
-			       sizeof(struct fc_lport) + sizeof(struct fnic));
-	if (!host) {
-		printk(KERN_ERR PFX "Unable to alloc SCSI host\n");
+	lp = libfc_host_alloc(&fnic_host_template, sizeof(struct fnic));
+	if (!lp) {
+		printk(KERN_ERR PFX "Unable to alloc libfc local port\n");
 		err = -ENOMEM;
 		goto err_out;
 	}
-	lp = shost_priv(host);
-	lp->host = host;
+	host = lp->host;
 	fnic = lport_priv(lp);
 	fnic->lport = lp;
 
diff --git a/drivers/scsi/libfc/fc_lport.c b/drivers/scsi/libfc/fc_lport.c
index 646dee1..c5f50e2 100644
--- a/drivers/scsi/libfc/fc_lport.c
+++ b/drivers/scsi/libfc/fc_lport.c
@@ -1502,7 +1502,6 @@ int fc_lport_init(struct fc_lport *lport)
 	if (lport->link_supported_speeds & FC_PORTSPEED_10GBIT)
 		fc_host_supported_speeds(lport->host) |= FC_PORTSPEED_10GBIT;
 
-	INIT_LIST_HEAD(&lport->ema_list);
 	return 0;
 }
 EXPORT_SYMBOL(fc_lport_init);
diff --git a/include/scsi/libfc.h b/include/scsi/libfc.h
index 81901fa..ab12671 100644
--- a/include/scsi/libfc.h
+++ b/include/scsi/libfc.h
@@ -739,12 +739,21 @@ static inline void *lport_priv(const struct fc_lport *lp)
  * @sht: ptr to the scsi host templ
  * @priv_size: size of private data after fc_lport
  *
- * Returns: ptr to Scsi_Host
+ * Returns: libfc lport
  */
-static inline struct Scsi_Host *
+static inline struct fc_lport *
 libfc_host_alloc(struct scsi_host_template *sht, int priv_size)
 {
-	return scsi_host_alloc(sht, sizeof(struct fc_lport) + priv_size);
+	struct fc_lport *lport;
+	struct Scsi_Host *shost;
+
+	shost = scsi_host_alloc(sht, sizeof(*lport) + priv_size);
+	if (!shost)
+		return NULL;
+	lport = shost_priv(shost);
+	lport->host = shost;
+	INIT_LIST_HEAD(&lport->ema_list);
+	return lport;
 }
 
 /*

[PATCH 11/35] libfc: add some generic NPIV support routines to libfc

[Robert Love]

From: Chris Leech <christopher.leech@intel.com>

Adds a function to create a new VN_Port instances, which share the EM
list with the N_Port, VN_Port lookup by fabric ID when responding to a new
request (otherwise the exchange lookup from the N_Ports EM list is trusted to
return an exchange with a cached lport value for the correct VN_Port),
a pointer to a fc_vport structure for VN_Ports, and flags to indicate if an
N_Port supports NPIV and if the switch/fabric allows it.

Signed-off-by: Chris Leech <christopher.leech@intel.com>
Signed-off-by: Robert Love <robert.w.love@intel.com>
---

 drivers/scsi/libfc/Makefile  |    3 +
 drivers/scsi/libfc/fc_exch.c |   29 ++++++++++++++
 drivers/scsi/libfc/fc_npiv.c |   86 ++++++++++++++++++++++++++++++++++++++++++
 include/scsi/libfc.h         |   20 ++++++++++
 4 files changed, 137 insertions(+), 1 deletions(-)
 create mode 100644 drivers/scsi/libfc/fc_npiv.c

diff --git a/drivers/scsi/libfc/Makefile b/drivers/scsi/libfc/Makefile
index 2be549c..4bb23ac 100644
--- a/drivers/scsi/libfc/Makefile
+++ b/drivers/scsi/libfc/Makefile
@@ -10,4 +10,5 @@ libfc-objs := \
 	fc_frame.o \
 	fc_lport.o \
 	fc_rport.o \
-	fc_fcp.o
+	fc_fcp.o \
+	fc_npiv.o
diff --git a/drivers/scsi/libfc/fc_exch.c b/drivers/scsi/libfc/fc_exch.c
index 5e43f79..c40eab5 100644
--- a/drivers/scsi/libfc/fc_exch.c
+++ b/drivers/scsi/libfc/fc_exch.c
@@ -1136,6 +1136,15 @@ static void fc_exch_recv_req(struct fc_lport *lp, struct fc_exch_mgr *mp,
 	u32 f_ctl;
 	enum fc_pf_rjt_reason reject;
 
+	/* We can have the wrong fc_lport at this point with NPIV, which is a
+	 * problem now that we know a new exchange needs to be allocated
+	 */
+	lp = fc_vport_id_lookup(lp, ntoh24(fh->fh_d_id));
+	if (!lp) {
+		fc_frame_free(fp);
+		return;
+	}
+
 	fr_seq(fp) = NULL;
 	reject = fc_seq_lookup_recip(lp, mp, fp);
 	if (reject == FC_RJT_NONE) {
@@ -1901,6 +1910,26 @@ void fc_exch_mgr_del(struct fc_exch_mgr_anchor *ema)
 }
 EXPORT_SYMBOL(fc_exch_mgr_del);
 
+/**
+ * fc_exch_mgr_list_clone() - share all exchange manager objects
+ * @src: source lport to clone exchange managers from
+ * @dst: new lport that takes references to all the exchange managers
+ */
+int fc_exch_mgr_list_clone(struct fc_lport *src, struct fc_lport *dst)
+{
+	struct fc_exch_mgr_anchor *ema, *tmp;
+
+	list_for_each_entry(ema, &src->ema_list, ema_list) {
+		if (!fc_exch_mgr_add(dst, ema->mp, ema->match))
+			goto err;
+	}
+	return 0;
+err:
+	list_for_each_entry_safe(ema, tmp, &dst->ema_list, ema_list)
+		fc_exch_mgr_del(ema);
+	return -ENOMEM;
+}
+
 struct fc_exch_mgr *fc_exch_mgr_alloc(struct fc_lport *lp,
 				      enum fc_class class,
 				      u16 min_xid, u16 max_xid,
diff --git a/drivers/scsi/libfc/fc_npiv.c b/drivers/scsi/libfc/fc_npiv.c
new file mode 100644
index 0000000..39f02c0
--- /dev/null
+++ b/drivers/scsi/libfc/fc_npiv.c
@@ -0,0 +1,86 @@
+/*
+ * Copyright(c) 2009 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
+ */
+
+/*
+ * NPIV VN_Port helper functions for libfc
+ */
+
+#include <scsi/libfc.h>
+
+/**
+ * fc_vport_create() - Create a new NPIV vport instance
+ * @vport: fc_vport structure from scsi_transport_fc
+ * @privsize: driver private data size to allocate along with the Scsi_Host
+ */
+
+struct fc_lport *libfc_vport_create(struct fc_vport *vport, int privsize)
+{
+	struct Scsi_Host *shost = vport_to_shost(vport);
+	struct fc_lport *n_port = shost_priv(shost);
+	struct fc_lport *vn_port;
+
+	vn_port = libfc_host_alloc(shost->hostt, privsize);
+	if (!vn_port)
+		goto err_out;
+	if (fc_exch_mgr_list_clone(n_port, vn_port))
+		goto err_put;
+
+	vn_port->vport = vport;
+	vport->dd_data = vn_port;
+
+	mutex_lock(&n_port->lp_mutex);
+	list_add_tail(&vn_port->list, &n_port->vports);
+	mutex_unlock(&n_port->lp_mutex);
+
+	return vn_port;
+
+err_put:
+	scsi_host_put(vn_port->host);
+err_out:
+	return NULL;
+}
+EXPORT_SYMBOL(libfc_vport_create);
+
+/**
+ * fc_vport_id_lookup() - find NPIV lport that matches a given fabric ID
+ * @n_port: Top level N_Port which may have multiple NPIV VN_Ports
+ * @port_id: Fabric ID to find a match for
+ *
+ * Returns: matching lport pointer or NULL if there is no match
+ */
+struct fc_lport *fc_vport_id_lookup(struct fc_lport *n_port, u32 port_id)
+{
+	struct fc_lport *lport = NULL;
+	struct fc_lport *vn_port;
+
+	if (fc_host_port_id(n_port->host) == port_id)
+		return n_port;
+
+	mutex_lock(&n_port->lp_mutex);
+	list_for_each_entry(vn_port, &n_port->vports, list) {
+		if (fc_host_port_id(vn_port->host) == port_id) {
+			lport = vn_port;
+			break;
+		}
+	}
+	mutex_unlock(&n_port->lp_mutex);
+
+	return lport;
+}
+
diff --git a/include/scsi/libfc.h b/include/scsi/libfc.h
index ab12671..e5078a0 100644
--- a/include/scsi/libfc.h
+++ b/include/scsi/libfc.h
@@ -639,6 +639,8 @@ struct fc_lport {
 	/* Associations */
 	struct Scsi_Host	*host;
 	struct list_head	ema_list;
+	struct list_head	vports;		/* child vports if N_Port */
+	struct fc_vport		*vport;		/* parent vport if VN_Port */
 	struct fc_rport_priv	*dns_rp;
 	struct fc_rport_priv	*ptp_rp;
 	void			*scsi_priv;
@@ -663,6 +665,8 @@ struct fc_lport {
 	u32			seq_offload:1;	/* seq offload supported */
 	u32			crc_offload:1;	/* crc offload supported */
 	u32			lro_enabled:1;	/* large receive offload */
+	u32			does_npiv:1;	/* supports multiple vports */
+	u32			npiv_enabled:1;	/* switch/fabric allows NPIV */
 	u32			mfs;	        /* max FC payload size */
 	unsigned int		service_params;
 	unsigned int		e_d_tov;
@@ -753,6 +757,7 @@ libfc_host_alloc(struct scsi_host_template *sht, int priv_size)
 	lport = shost_priv(shost);
 	lport->host = shost;
 	INIT_LIST_HEAD(&lport->ema_list);
+	INIT_LIST_HEAD(&lport->vports);
 	return lport;
 }
 
@@ -805,6 +810,15 @@ int fc_lport_reset(struct fc_lport *);
  */
 int fc_set_mfs(struct fc_lport *lp, u32 mfs);
 
+/*
+ * Allocate a new lport struct for an NPIV VN_Port
+ */
+struct fc_lport *libfc_vport_create(struct fc_vport *vport, int privsize);
+
+/*
+ * Find an NPIV VN_Port by port ID
+ */
+struct fc_lport *fc_vport_id_lookup(struct fc_lport *n_port, u32 port_id);
 
 /*
  * REMOTE PORT LAYER
@@ -912,6 +926,12 @@ struct fc_exch_mgr_anchor *fc_exch_mgr_add(struct fc_lport *lport,
 void fc_exch_mgr_del(struct fc_exch_mgr_anchor *ema);
 
 /*
+ * Clone an exchange manager list, getting reference holds for each EM.
+ * This is for use with NPIV and sharing the X_ID space between VN_Ports.
+ */
+int fc_exch_mgr_list_clone(struct fc_lport *src, struct fc_lport *dst);
+
+/*
  * Allocates an Exchange Manager (EM).
  *
  * The EM manages exchanges for their allocation and

[PATCH 12/35] libfc: vport link handling and fc_vport state managment

[Robert Love]

From: Chris Leech <christopher.leech@intel.com>

NPIV vports are managed in libfc by changing their virtual link state
when the parent N_Ports internal state changes.  The vport link is only
online when the N_Port is in a ready state (logged into the fabric).

vport_state is updated as needed in this patch as well, currently the states
LINKDOWN, INITIALIZING, ACTIVE, DSIABLED, and NO_FABRIC_SUPP are used.

This also changes the fc_host port_state handling to differentiate between
LINKDOWN and OFFLINE.

Signed-off-by: Chris Leech <christopher.leech@intel.com>
Signed-off-by: Robert Love <robert.w.love@intel.com>
---

 drivers/scsi/libfc/fc_lport.c |   72 +++++++++++++++++++++++++++++++--------
 drivers/scsi/libfc/fc_npiv.c  |   75 +++++++++++++++++++++++++++++++++++++++++
 include/scsi/libfc.h          |    8 ++++
 3 files changed, 140 insertions(+), 15 deletions(-)

diff --git a/drivers/scsi/libfc/fc_lport.c b/drivers/scsi/libfc/fc_lport.c
index c5f50e2..2729e60 100644
--- a/drivers/scsi/libfc/fc_lport.c
+++ b/drivers/scsi/libfc/fc_lport.c
@@ -224,10 +224,18 @@ void fc_get_host_port_state(struct Scsi_Host *shost)
 {
 	struct fc_lport *lp = shost_priv(shost);
 
-	if (lp->link_up)
-		fc_host_port_state(shost) = FC_PORTSTATE_ONLINE;
+	mutex_lock(&lp->lp_mutex);
+	if (!lp->link_up)
+		fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN;
 	else
-		fc_host_port_state(shost) = FC_PORTSTATE_OFFLINE;
+		switch (lp->state) {
+		case LPORT_ST_READY:
+			fc_host_port_state(shost) = FC_PORTSTATE_ONLINE;
+			break;
+		default:
+			fc_host_port_state(shost) = FC_PORTSTATE_OFFLINE;
+		}
+	mutex_unlock(&lp->lp_mutex);
 }
 EXPORT_SYMBOL(fc_get_host_port_state);
 
@@ -493,40 +501,62 @@ int fc_fabric_login(struct fc_lport *lport)
 EXPORT_SYMBOL(fc_fabric_login);
 
 /**
- * fc_linkup() - Handler for transport linkup events
+ * __fc_linkup() - Handler for transport linkup events
  * @lport: The lport whose link is up
+ *
+ * Locking: must be called with the lp_mutex held
  */
-void fc_linkup(struct fc_lport *lport)
+void __fc_linkup(struct fc_lport *lport)
 {
-	printk(KERN_INFO "libfc: Link up on port (%6x)\n",
-	       fc_host_port_id(lport->host));
-
-	mutex_lock(&lport->lp_mutex);
 	if (!lport->link_up) {
 		lport->link_up = 1;
 
 		if (lport->state == LPORT_ST_RESET)
 			fc_lport_enter_flogi(lport);
 	}
+}
+
+/**
+ * fc_linkup() - Handler for transport linkup events
+ * @lport: The lport whose link is up
+ */
+void fc_linkup(struct fc_lport *lport)
+{
+	printk(KERN_INFO "libfc: Link up on port (%6x)\n",
+	       fc_host_port_id(lport->host));
+
+	mutex_lock(&lport->lp_mutex);
+	__fc_linkup(lport);
 	mutex_unlock(&lport->lp_mutex);
 }
 EXPORT_SYMBOL(fc_linkup);
 
 /**
- * fc_linkdown() - Handler for transport linkdown events
+ * __fc_linkdown() - Handler for transport linkdown events
  * @lport: The lport whose link is down
+ *
+ * Locking: must be called with the lp_mutex held
  */
-void fc_linkdown(struct fc_lport *lport)
+void __fc_linkdown(struct fc_lport *lport)
 {
-	mutex_lock(&lport->lp_mutex);
-	printk(KERN_INFO "libfc: Link down on port (%6x)\n",
-	       fc_host_port_id(lport->host));
-
 	if (lport->link_up) {
 		lport->link_up = 0;
 		fc_lport_enter_reset(lport);
 		lport->tt.fcp_cleanup(lport);
 	}
+}
+
+/**
+ * fc_linkdown() - Handler for transport linkdown events
+ * @lport: The lport whose link is down
+ */
+void fc_linkdown(struct fc_lport *lport)
+{
+	printk(KERN_INFO "libfc: Link down on port (%6x)\n",
+	       fc_host_port_id(lport->host));
+
+	mutex_lock(&lport->lp_mutex);
+	__fc_linkdown(lport);
 	mutex_unlock(&lport->lp_mutex);
 }
 EXPORT_SYMBOL(fc_linkdown);
@@ -654,6 +684,9 @@ static void fc_lport_enter_ready(struct fc_lport *lport)
 		     fc_lport_state(lport));
 
 	fc_lport_state_enter(lport, LPORT_ST_READY);
+	if (lport->vport)
+		fc_vport_set_state(lport->vport, FC_VPORT_ACTIVE);
+	fc_vports_linkchange(lport);
 
 	if (!lport->ptp_rp)
 		lport->tt.disc_start(fc_lport_disc_callback, lport);
@@ -868,7 +901,14 @@ static void fc_lport_enter_reset(struct fc_lport *lport)
 	FC_LPORT_DBG(lport, "Entered RESET state from %s state\n",
 		     fc_lport_state(lport));
 
+	if (lport->vport) {
+		if (lport->link_up)
+			fc_vport_set_state(lport->vport, FC_VPORT_INITIALIZING);
+		else
+			fc_vport_set_state(lport->vport, FC_VPORT_LINKDOWN);
+	}
 	fc_lport_state_enter(lport, LPORT_ST_RESET);
+	fc_vports_linkchange(lport);
 	fc_lport_reset_locked(lport);
 	if (lport->link_up)
 		fc_lport_enter_flogi(lport);
@@ -887,6 +927,7 @@ static void fc_lport_enter_disabled(struct fc_lport *lport)
 		     fc_lport_state(lport));
 
 	fc_lport_state_enter(lport, LPORT_ST_DISABLED);
+	fc_vports_linkchange(lport);
 	fc_lport_reset_locked(lport);
 }
 
@@ -1330,6 +1371,7 @@ static void fc_lport_enter_logo(struct fc_lport *lport)
 		     fc_lport_state(lport));
 
 	fc_lport_state_enter(lport, LPORT_ST_LOGO);
+	fc_vports_linkchange(lport);
 
 	fp = fc_frame_alloc(lport, sizeof(*logo));
 	if (!fp) {
diff --git a/drivers/scsi/libfc/fc_npiv.c b/drivers/scsi/libfc/fc_npiv.c
index 39f02c0..c68f6c7 100644
--- a/drivers/scsi/libfc/fc_npiv.c
+++ b/drivers/scsi/libfc/fc_npiv.c
@@ -84,3 +84,78 @@ struct fc_lport *fc_vport_id_lookup(struct fc_lport *n_port, u32 port_id)
 	return lport;
 }
 
+/*
+ * When setting the link state of vports during an lport state change, it's
+ * necessary to hold the lp_mutex of both the N_Port and the VN_Port.
+ * This tells the lockdep engine to treat the nested locking of the VN_Port
+ * as a different lock class.
+ */
+enum libfc_lport_mutex_class {
+	LPORT_MUTEX_NORMAL = 0,
+	LPORT_MUTEX_VN_PORT = 1,
+};
+
+/**
+ * __fc_vport_setlink() - update link and status on a VN_Port
+ * @n_port: parent N_Port
+ * @vn_port: VN_Port to update
+ *
+ * Locking: must be called with both the N_Port and VN_Port lp_mutex held
+ */
+static void __fc_vport_setlink(struct fc_lport *n_port,
+			       struct fc_lport *vn_port)
+{
+	struct fc_vport *vport = vn_port->vport;
+
+	if (vn_port->state == LPORT_ST_DISABLED)
+		return;
+
+	if (n_port->state == LPORT_ST_READY) {
+		if (n_port->npiv_enabled) {
+			fc_vport_set_state(vport, FC_VPORT_INITIALIZING);
+			__fc_linkup(vn_port);
+		} else {
+			fc_vport_set_state(vport, FC_VPORT_NO_FABRIC_SUPP);
+			__fc_linkdown(vn_port);
+		}
+	} else {
+		fc_vport_set_state(vport, FC_VPORT_LINKDOWN);
+		__fc_linkdown(vn_port);
+	}
+}
+
+/**
+ * fc_vport_setlink() - update link and status on a VN_Port
+ * @vn_port: virtual port to update
+ */
+void fc_vport_setlink(struct fc_lport *vn_port)
+{
+	struct fc_vport *vport = vn_port->vport;
+	struct Scsi_Host *shost = vport_to_shost(vport);
+	struct fc_lport *n_port = shost_priv(shost);
+
+	mutex_lock(&n_port->lp_mutex);
+	mutex_lock_nested(&vn_port->lp_mutex, LPORT_MUTEX_VN_PORT);
+	__fc_vport_setlink(n_port, vn_port);
+	mutex_unlock(&vn_port->lp_mutex);
+	mutex_unlock(&n_port->lp_mutex);
+}
+EXPORT_SYMBOL(fc_vport_setlink);
+
+/**
+ * fc_vports_linkchange() - change the link state of all vports
+ * @n_port: Parent N_Port that has changed state
+ *
+ * Locking: called with the n_port lp_mutex held
+ */
+void fc_vports_linkchange(struct fc_lport *n_port)
+{
+	struct fc_lport *vn_port;
+
+	list_for_each_entry(vn_port, &n_port->vports, list) {
+		mutex_lock_nested(&vn_port->lp_mutex, LPORT_MUTEX_VN_PORT);
+		__fc_vport_setlink(n_port, vn_port);
+		mutex_unlock(&vn_port->lp_mutex);
+	}
+}
+
diff --git a/include/scsi/libfc.h b/include/scsi/libfc.h
index e5078a0..015e520 100644
--- a/include/scsi/libfc.h
+++ b/include/scsi/libfc.h
@@ -788,11 +788,13 @@ int fc_fabric_login(struct fc_lport *lp);
 /*
  * The link is up for the given local port.
  */
+void __fc_linkup(struct fc_lport *);
 void fc_linkup(struct fc_lport *);
 
 /*
  * Link is down for the given local port.
  */
+void __fc_linkdown(struct fc_lport *);
 void fc_linkdown(struct fc_lport *);
 
 /*
@@ -821,6 +823,12 @@ struct fc_lport *libfc_vport_create(struct fc_vport *vport, int privsize);
 struct fc_lport *fc_vport_id_lookup(struct fc_lport *n_port, u32 port_id);
 
 /*
+ * NPIV VN_Port link state management
+ */
+void fc_vport_setlink(struct fc_lport *vn_port);
+void fc_vports_linkchange(struct fc_lport *n_port);
+
+/*
  * REMOTE PORT LAYER
  *****************************/
 int fc_rport_init(struct fc_lport *lp);

[PATCH 13/35] libfc, libfcoe: FDISC ELS for NPIV

[Robert Love]

From: Chris Leech <christopher.leech@intel.com>

Add FDISC ELS handling to libfc and libfcoe, treat it the same as FLOGI where
appropriate.

Add checking for NPIV support in the FLOGI LS_ACC service parameters.

Signed-off-by: Chris Leech <christopher.leech@intel.com>
Signed-off-by: Robert Love <robert.w.love@intel.com>
---

 drivers/scsi/fcoe/libfcoe.c   |    6 +++---
 drivers/scsi/libfc/fc_lport.c |    6 +++++-
 include/scsi/fc/fc_els.h      |    4 +++-
 include/scsi/fc_encode.h      |   29 +++++++++++++++++++++++++++++
 4 files changed, 40 insertions(+), 5 deletions(-)

diff --git a/drivers/scsi/fcoe/libfcoe.c b/drivers/scsi/fcoe/libfcoe.c
index 62a4c20..8d2e5aa 100644
--- a/drivers/scsi/fcoe/libfcoe.c
+++ b/drivers/scsi/fcoe/libfcoe.c
@@ -450,7 +450,7 @@ static int fcoe_ctlr_encaps(struct fcoe_ctlr *fip,
 	memset(mac, 0, sizeof(mac));
 	mac->fd_desc.fip_dtype = FIP_DT_MAC;
 	mac->fd_desc.fip_dlen = sizeof(*mac) / FIP_BPW;
-	if (dtype != FIP_DT_FLOGI)
+	if (dtype != FIP_DT_FLOGI && dtype != FIP_DT_FDISC)
 		memcpy(mac->fd_mac, fip->data_src_addr, ETH_ALEN);
 	else if (fip->spma)
 		memcpy(mac->fd_mac, fip->ctl_src_addr, ETH_ALEN);
@@ -866,8 +866,8 @@ static void fcoe_ctlr_recv_els(struct fcoe_ctlr *fip, struct sk_buff *skb)
 		goto drop;
 	els_op = *(u8 *)(fh + 1);
 
-	if (els_dtype == FIP_DT_FLOGI && sub == FIP_SC_REP &&
-	    fip->flogi_oxid == ntohs(fh->fh_ox_id) &&
+	if ((els_dtype == FIP_DT_FLOGI || els_dtype == FIP_DT_FDISC) &&
+	    sub == FIP_SC_REP && fip->flogi_oxid == ntohs(fh->fh_ox_id) &&
 	    els_op == ELS_LS_ACC && is_valid_ether_addr(granted_mac)) {
 		fip->flogi_oxid = FC_XID_UNKNOWN;
 		fip->update_mac(fip, fip->data_src_addr, granted_mac);
diff --git a/drivers/scsi/libfc/fc_lport.c b/drivers/scsi/libfc/fc_lport.c
index 2729e60..dd6a1db 100644
--- a/drivers/scsi/libfc/fc_lport.c
+++ b/drivers/scsi/libfc/fc_lport.c
@@ -1446,6 +1446,9 @@ static void fc_lport_flogi_resp(struct fc_seq *sp, struct fc_frame *fp,
 			e_d_tov = ntohl(flp->fl_csp.sp_e_d_tov);
 			if (csp_flags & FC_SP_FT_EDTR)
 				e_d_tov /= 1000000;
+
+			lport->npiv_enabled = !!(csp_flags & FC_SP_FT_NPIV_ACC);
+
 			if ((csp_flags & FC_SP_FT_FPORT) == 0) {
 				if (e_d_tov > lport->e_d_tov)
 					lport->e_d_tov = e_d_tov;
@@ -1495,7 +1498,8 @@ void fc_lport_enter_flogi(struct fc_lport *lport)
 	if (!fp)
 		return fc_lport_error(lport, fp);
 
-	if (!lport->tt.elsct_send(lport, FC_FID_FLOGI, fp, ELS_FLOGI,
+	if (!lport->tt.elsct_send(lport, FC_FID_FLOGI, fp,
+				  lport->vport ? ELS_FDISC : ELS_FLOGI,
 				  fc_lport_flogi_resp, lport, lport->e_d_tov))
 		fc_lport_error(lport, fp);
 }
diff --git a/include/scsi/fc/fc_els.h b/include/scsi/fc/fc_els.h
index 195ca01..b0872af 100644
--- a/include/scsi/fc/fc_els.h
+++ b/include/scsi/fc/fc_els.h
@@ -248,10 +248,12 @@ struct fc_els_csp {
 /*
  * sp_features
  */
-#define	FC_SP_FT_CIRO	0x8000	/* continuously increasing rel. off. */
+#define	FC_SP_FT_NPIV	0x8000	/* multiple N_Port_ID support (FLOGI) */
+#define	FC_SP_FT_CIRO	0x8000	/* continuously increasing rel off (PLOGI) */
 #define	FC_SP_FT_CLAD	0x8000	/* clean address (in FLOGI LS_ACC) */
 #define	FC_SP_FT_RAND	0x4000	/* random relative offset */
 #define	FC_SP_FT_VAL	0x2000	/* valid vendor version level */
+#define	FC_SP_FT_NPIV_ACC	0x2000	/* NPIV assignment (FLOGI LS_ACC) */
 #define	FC_SP_FT_FPORT	0x1000	/* F port (1) vs. N port (0) */
 #define	FC_SP_FT_ABB	0x0800	/* alternate BB_credit management */
 #define	FC_SP_FT_EDTR	0x0400	/* E_D_TOV Resolution is nanoseconds */
diff --git a/include/scsi/fc_encode.h b/include/scsi/fc_encode.h
index 27dad70..c93ca3e 100644
--- a/include/scsi/fc_encode.h
+++ b/include/scsi/fc_encode.h
@@ -198,6 +198,31 @@ static inline void fc_flogi_fill(struct fc_lport *lport, struct fc_frame *fp)
 	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);
+	if (lport->does_npiv)
+		sp->sp_features = htons(FC_SP_FT_NPIV);
+}
+
+/**
+ * fc_fdisc_fill - Fill in a fdisc request frame.
+ */
+static inline void fc_fdisc_fill(struct fc_lport *lport, struct fc_frame *fp)
+{
+	struct fc_els_csp *sp;
+	struct fc_els_cssp *cp;
+	struct fc_els_flogi *fdisc;
+
+	fdisc = fc_frame_payload_get(fp, sizeof(*fdisc));
+	memset(fdisc, 0, sizeof(*fdisc));
+	fdisc->fl_cmd = (u8) ELS_FDISC;
+	put_unaligned_be64(lport->wwpn, &fdisc->fl_wwpn);
+	put_unaligned_be64(lport->wwnn, &fdisc->fl_wwnn);
+	sp = &fdisc->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 = &fdisc->fl_cssp[3 - 1];	/* class 3 parameters */
+	cp->cp_class = htons(FC_CPC_VALID | FC_CPC_SEQ);
 }
 
 /**
@@ -296,6 +321,10 @@ static inline int fc_els_fill(struct fc_lport *lport,
 		fc_flogi_fill(lport, fp);
 		break;
 
+	case ELS_FDISC:
+		fc_fdisc_fill(lport, fp);
+		break;
+
 	case ELS_LOGO:
 		fc_logo_fill(lport, fp);
 		break;

[PATCH 14/35] libfcoe, fcoe: libfcoe NPIV support

[Robert Love]

From: Chris Leech <christopher.leech@intel.com>

The FIP code in libfcoe needed several changes to support NPIV

1) dst_src_addr needs to be managed per-n_port-ID for FPMA fabrics with NPIV
   enabled.  Managing the MAC address is now handled in fcoe, with some slight
   changes to update_mac() and a new get_src_addr() function pointer.

2) The libfc elsct_send() hook is used to setup FCoE specific response
   handlers for FIP encapsulated ELS exchanges.  This lets the FCoE specific
   handling know which VN_Port the exchange is for, and doesn't require
   tracking OX_IDs.  It might be possible to roll back to the full FIP frame
   in these, but for now I've just stashed the contents of the MAC address
   descriptor in the skb context block for later use.  Also, because
   fcoe_elsct_send() just passes control on to fc_elsct_send(), all transmits
   still come through the normal frame_send() path.

3) The NPIV changes added a mutex hold in the keep alive sending, the lport
   mutex is protecting the vport list.  We can't take a mutex from a timer,
   so move the FIP keep alive logic to the link work struct.

Signed-off-by: Chris Leech <christopher.leech@intel.com>
Signed-off-by: Robert Love <robert.w.love@intel.com>
---

 drivers/scsi/fcoe/fcoe.c      |  147 ++++++++++++++++++++++++++++++++++++-----
 drivers/scsi/fcoe/fcoe.h      |    1 
 drivers/scsi/fcoe/libfcoe.c   |   82 ++++++++++++++---------
 drivers/scsi/libfc/fc_elsct.c |    3 +
 drivers/scsi/libfc/fc_lport.c |    6 +-
 include/scsi/fc_frame.h       |    3 +
 include/scsi/libfc.h          |   10 +++
 include/scsi/libfcoe.h        |   15 +++-
 8 files changed, 207 insertions(+), 60 deletions(-)

diff --git a/drivers/scsi/fcoe/fcoe.c b/drivers/scsi/fcoe/fcoe.c
index a0e27e3..bfef723 100644
--- a/drivers/scsi/fcoe/fcoe.c
+++ b/drivers/scsi/fcoe/fcoe.c
@@ -217,7 +217,8 @@ static int fcoe_interface_setup(struct fcoe_interface *fcoe,
 }
 
 static void fcoe_fip_send(struct fcoe_ctlr *fip, struct sk_buff *skb);
-static void fcoe_update_src_mac(struct fcoe_ctlr *fip, u8 *old, u8 *new);
+static void fcoe_update_src_mac(struct fc_lport *lport, u8 *addr);
+static u8 *fcoe_get_src_mac(struct fc_lport *lport);
 static void fcoe_destroy_work(struct work_struct *work);
 
 /**
@@ -245,6 +246,7 @@ static struct fcoe_interface *fcoe_interface_create(struct net_device *netdev)
 	fcoe_ctlr_init(&fcoe->ctlr);
 	fcoe->ctlr.send = fcoe_fip_send;
 	fcoe->ctlr.update_mac = fcoe_update_src_mac;
+	fcoe->ctlr.get_src_addr = fcoe_get_src_mac;
 
 	fcoe_interface_setup(fcoe, netdev);
 
@@ -276,8 +278,6 @@ void fcoe_interface_cleanup(struct fcoe_interface *fcoe)
 	/* Delete secondary MAC addresses */
 	memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN);
 	dev_unicast_delete(netdev, flogi_maddr);
-	if (!is_zero_ether_addr(fip->data_src_addr))
-		dev_unicast_delete(netdev, fip->data_src_addr);
 	if (fip->spma)
 		dev_unicast_delete(netdev, fip->ctl_src_addr);
 	dev_mc_delete(netdev, FIP_ALL_ENODE_MACS, ETH_ALEN, 0);
@@ -351,26 +351,38 @@ static void fcoe_fip_send(struct fcoe_ctlr *fip, struct sk_buff *skb)
 
 /**
  * fcoe_update_src_mac() - Update Ethernet MAC filters.
- * @fip: FCoE controller.
- * @old: Unicast MAC address to delete if the MAC is non-zero.
- * @new: Unicast MAC address to add.
+ * @lport: libfc lport
+ * @addr: Unicast MAC address to add.
  *
  * Remove any previously-set unicast MAC filter.
  * Add secondary FCoE MAC address filter for our OUI.
  */
-static void fcoe_update_src_mac(struct fcoe_ctlr *fip, u8 *old, u8 *new)
+static void fcoe_update_src_mac(struct fc_lport *lport, u8 *addr)
 {
-	struct fcoe_interface *fcoe;
+	struct fcoe_port *port = lport_priv(lport);
+	struct fcoe_interface *fcoe = port->fcoe;
 
-	fcoe = fcoe_from_ctlr(fip);
 	rtnl_lock();
-	if (!is_zero_ether_addr(old))
-		dev_unicast_delete(fcoe->netdev, old);
-	dev_unicast_add(fcoe->netdev, new);
+	if (!is_zero_ether_addr(port->data_src_addr))
+		dev_unicast_delete(fcoe->netdev, port->data_src_addr);
+	if (!is_zero_ether_addr(addr))
+		dev_unicast_add(fcoe->netdev, addr);
+	memcpy(port->data_src_addr, addr, ETH_ALEN);
 	rtnl_unlock();
 }
 
 /**
+ * fcoe_get_src_mac() - return the Ethernet source address for an lport
+ * @lport: libfc lport
+ */
+static u8 *fcoe_get_src_mac(struct fc_lport *lport)
+{
+	struct fcoe_port *port = lport_priv(lport);
+
+	return port->data_src_addr;
+}
+
+/**
  * fcoe_lport_config() - sets up the fc_lport
  * @lp: ptr to the fc_lport
  *
@@ -628,6 +640,11 @@ static void fcoe_if_destroy(struct fc_lport *lport)
 	/* Free existing transmit skbs */
 	fcoe_clean_pending_queue(lport);
 
+	rtnl_lock();
+	if (!is_zero_ether_addr(port->data_src_addr))
+		dev_unicast_delete(netdev, port->data_src_addr);
+	rtnl_unlock();
+
 	/* receives may not be stopped until after this */
 	fcoe_interface_put(fcoe);
 
@@ -684,10 +701,16 @@ static int fcoe_ddp_done(struct fc_lport *lp, u16 xid)
 	return 0;
 }
 
+static struct fc_seq *fcoe_elsct_send(struct fc_lport *lport,
+		u32 did, struct fc_frame *fp, unsigned int op,
+		void (*resp)(struct fc_seq *, struct fc_frame *, void *),
+		void *arg, u32 timeout);
+
 static struct libfc_function_template fcoe_libfc_fcn_templ = {
 	.frame_send = fcoe_xmit,
 	.ddp_setup = fcoe_ddp_setup,
 	.ddp_done = fcoe_ddp_done,
+	.elsct_send = fcoe_elsct_send,
 };
 
 /**
@@ -1205,7 +1228,7 @@ int fcoe_xmit(struct fc_lport *lp, struct fc_frame *fp)
 	}
 
 	if (unlikely(fh->fh_r_ctl == FC_RCTL_ELS_REQ) &&
-	    fcoe_ctlr_els_send(&fcoe->ctlr, skb))
+	    fcoe_ctlr_els_send(&fcoe->ctlr, lp, skb))
 		return 0;
 
 	sof = fr_sof(fp);
@@ -1270,7 +1293,7 @@ int fcoe_xmit(struct fc_lport *lp, struct fc_frame *fp)
 	if (unlikely(fcoe->ctlr.flogi_oxid != FC_XID_UNKNOWN))
 		memcpy(eh->h_source, fcoe->ctlr.ctl_src_addr, ETH_ALEN);
 	else
-		memcpy(eh->h_source, fcoe->ctlr.data_src_addr, ETH_ALEN);
+		memcpy(eh->h_source, port->data_src_addr, ETH_ALEN);
 
 	hp = (struct fcoe_hdr *)(eh + 1);
 	memset(hp, 0, sizeof(*hp));
@@ -1443,11 +1466,6 @@ int fcoe_percpu_receive_thread(void *arg)
 			}
 			fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED;
 		}
-		if (unlikely(port->fcoe->ctlr.flogi_oxid != FC_XID_UNKNOWN) &&
-		    fcoe_ctlr_recv_flogi(&port->fcoe->ctlr, fp, mac)) {
-			fc_frame_free(fp);
-			continue;
-		}
 		fc_exch_recv(lp, fp);
 	}
 	return 0;
@@ -2038,3 +2056,94 @@ static void __exit fcoe_exit(void)
 	fcoe_if_exit();
 }
 module_exit(fcoe_exit);
+
+/**
+ * fcoe_flogi_resp() - FCoE specific FLOGI and FDISC response handler
+ * @seq: active sequence in the FLOGI or FDISC exchange
+ * @fp: response frame, or error encoded in a pointer (timeout)
+ * @arg: pointer the the fcoe_ctlr structure
+ *
+ * This handles MAC address managment for FCoE, then passes control on to
+ * the libfc FLOGI response handler.
+ */
+static void fcoe_flogi_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg)
+{
+	struct fcoe_ctlr *fip = arg;
+	struct fc_exch *exch = fc_seq_exch(seq);
+	struct fc_lport *lport = exch->lp;
+	u8 *mac;
+
+	if (IS_ERR(fp))
+		goto done;
+
+	mac = fr_cb(fp)->granted_mac;
+	if (is_zero_ether_addr(mac)) {
+		/* pre-FIP */
+		mac = eth_hdr(&fp->skb)->h_source;
+		if (fcoe_ctlr_recv_flogi(fip, lport, fp, mac)) {
+			fc_frame_free(fp);
+			return;
+		}
+	} else {
+		/* FIP, libfcoe has already seen it */
+		fip->update_mac(lport, fr_cb(fp)->granted_mac);
+	}
+done:
+	fc_lport_flogi_resp(seq, fp, lport);
+}
+
+/**
+ * fcoe_logo_resp() - FCoE specific LOGO response handler
+ * @seq: active sequence in the LOGO exchange
+ * @fp: response frame, or error encoded in a pointer (timeout)
+ * @arg: pointer the the fcoe_ctlr structure
+ *
+ * This handles MAC address managment for FCoE, then passes control on to
+ * the libfc LOGO response handler.
+ */
+static void fcoe_logo_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg)
+{
+	struct fcoe_ctlr *fip = arg;
+	struct fc_exch *exch = fc_seq_exch(seq);
+	struct fc_lport *lport = exch->lp;
+	static u8 zero_mac[ETH_ALEN] = { 0 };
+
+	if (!IS_ERR(fp))
+		fip->update_mac(lport, zero_mac);
+	fc_lport_logo_resp(seq, fp, lport);
+}
+
+/**
+ * fcoe_elsct_send - FCoE specific ELS handler
+ *
+ * This does special case handling of FIP encapsualted ELS exchanges for FCoE,
+ * using FCoE specific response handlers and passing the FIP controller as
+ * the argument (the lport is still available from the exchange).
+ *
+ * Most of the work here is just handed off to the libfc routine.
+ */
+static struct fc_seq *fcoe_elsct_send(struct fc_lport *lport,
+		u32 did, struct fc_frame *fp, unsigned int op,
+		void (*resp)(struct fc_seq *, struct fc_frame *, void *),
+		void *arg, u32 timeout)
+{
+	struct fcoe_port *port = lport_priv(lport);
+	struct fcoe_interface *fcoe = port->fcoe;
+	struct fcoe_ctlr *fip = &fcoe->ctlr;
+	struct fc_frame_header *fh = fc_frame_header_get(fp);
+
+	switch (op) {
+	case ELS_FLOGI:
+	case ELS_FDISC:
+		return fc_elsct_send(lport, did, fp, op, fcoe_flogi_resp,
+				     fip, timeout);
+	case ELS_LOGO:
+		/* only hook onto fabric logouts, not port logouts */
+		if (ntoh24(fh->fh_d_id) != FC_FID_FLOGI)
+			break;
+		return fc_elsct_send(lport, did, fp, op, fcoe_logo_resp,
+				     fip, timeout);
+	}
+	return fc_elsct_send(lport, did, fp, op, resp, arg, timeout);
+}
+
diff --git a/drivers/scsi/fcoe/fcoe.h b/drivers/scsi/fcoe/fcoe.h
index aa9c2d0..6460f32 100644
--- a/drivers/scsi/fcoe/fcoe.h
+++ b/drivers/scsi/fcoe/fcoe.h
@@ -98,6 +98,7 @@ struct fcoe_port {
 	u8	fcoe_pending_queue_active;
 	struct timer_list timer;		/* queue timer */
 	struct work_struct destroy_work;	/* to prevent rtnl deadlocks */
+	u8 data_src_addr[ETH_ALEN];
 };
 
 #define fcoe_from_ctlr(fip) container_of(fip, struct fcoe_interface, ctlr)
diff --git a/drivers/scsi/fcoe/libfcoe.c b/drivers/scsi/fcoe/libfcoe.c
index 8d2e5aa..dc3a451 100644
--- a/drivers/scsi/fcoe/libfcoe.c
+++ b/drivers/scsi/fcoe/libfcoe.c
@@ -323,6 +323,7 @@ EXPORT_SYMBOL(fcoe_ctlr_link_down);
 /**
  * fcoe_ctlr_send_keep_alive() - Send a keep-alive to the selected FCF.
  * @fip:	FCoE controller.
+ * @lport:	libfc fc_lport to send from
  * @ports:	0 for controller keep-alive, 1 for port keep-alive.
  * @sa:		source MAC address.
  *
@@ -333,7 +334,9 @@ EXPORT_SYMBOL(fcoe_ctlr_link_down);
  * The source MAC is the assigned mapped source address.
  * The destination is the FCF's F-port.
  */
-static void fcoe_ctlr_send_keep_alive(struct fcoe_ctlr *fip, int ports, u8 *sa)
+static void fcoe_ctlr_send_keep_alive(struct fcoe_ctlr *fip,
+				      struct fc_lport *lport,
+				      int ports, u8 *sa)
 {
 	struct sk_buff *skb;
 	struct fip_kal {
@@ -375,16 +378,14 @@ static void fcoe_ctlr_send_keep_alive(struct fcoe_ctlr *fip, int ports, u8 *sa)
 	kal->mac.fd_desc.fip_dtype = FIP_DT_MAC;
 	kal->mac.fd_desc.fip_dlen = sizeof(kal->mac) / FIP_BPW;
 	memcpy(kal->mac.fd_mac, fip->ctl_src_addr, ETH_ALEN);
-
 	if (ports) {
 		vn = (struct fip_vn_desc *)(kal + 1);
 		vn->fd_desc.fip_dtype = FIP_DT_VN_ID;
 		vn->fd_desc.fip_dlen = sizeof(*vn) / FIP_BPW;
-		memcpy(vn->fd_mac, fip->data_src_addr, ETH_ALEN);
+		memcpy(vn->fd_mac, fip->get_src_addr(lport), ETH_ALEN);
 		hton24(vn->fd_fc_id, fc_host_port_id(lp->host));
 		put_unaligned_be64(lp->wwpn, &vn->fd_wwpn);
 	}
-
 	skb_put(skb, len);
 	skb->protocol = htons(ETH_P_FIP);
 	skb_reset_mac_header(skb);
@@ -395,6 +396,7 @@ static void fcoe_ctlr_send_keep_alive(struct fcoe_ctlr *fip, int ports, u8 *sa)
 /**
  * fcoe_ctlr_encaps() - Encapsulate an ELS frame for FIP, without sending it.
  * @fip:	FCoE controller.
+ * @lport:	libfc fc_lport to use for the source address
  * @dtype:	FIP descriptor type for the frame.
  * @skb:	FCoE ELS frame including FC header but no FCoE headers.
  *
@@ -406,7 +408,7 @@ static void fcoe_ctlr_send_keep_alive(struct fcoe_ctlr *fip, int ports, u8 *sa)
  * Headroom includes the FIP encapsulation description, FIP header, and
  * Ethernet header.  The tailroom is for the FIP MAC descriptor.
  */
-static int fcoe_ctlr_encaps(struct fcoe_ctlr *fip,
+static int fcoe_ctlr_encaps(struct fcoe_ctlr *fip, struct fc_lport *lport,
 			    u8 dtype, struct sk_buff *skb)
 {
 	struct fip_encaps_head {
@@ -451,7 +453,7 @@ static int fcoe_ctlr_encaps(struct fcoe_ctlr *fip,
 	mac->fd_desc.fip_dtype = FIP_DT_MAC;
 	mac->fd_desc.fip_dlen = sizeof(*mac) / FIP_BPW;
 	if (dtype != FIP_DT_FLOGI && dtype != FIP_DT_FDISC)
-		memcpy(mac->fd_mac, fip->data_src_addr, ETH_ALEN);
+		memcpy(mac->fd_mac, fip->get_src_addr(lport), ETH_ALEN);
 	else if (fip->spma)
 		memcpy(mac->fd_mac, fip->ctl_src_addr, ETH_ALEN);
 
@@ -464,6 +466,7 @@ static int fcoe_ctlr_encaps(struct fcoe_ctlr *fip,
 /**
  * fcoe_ctlr_els_send() - Send an ELS frame encapsulated by FIP if appropriate.
  * @fip:	FCoE controller.
+ * @lport:	libfc fc_lport to send from
  * @skb:	FCoE ELS frame including FC header but no FCoE headers.
  *
  * Returns a non-zero error code if the frame should not be sent.
@@ -472,11 +475,13 @@ static int fcoe_ctlr_encaps(struct fcoe_ctlr *fip,
  * The caller must check that the length is a multiple of 4.
  * The SKB must have enough headroom (28 bytes) and tailroom (8 bytes).
  */
-int fcoe_ctlr_els_send(struct fcoe_ctlr *fip, struct sk_buff *skb)
+int fcoe_ctlr_els_send(struct fcoe_ctlr *fip, struct fc_lport *lport,
+		       struct sk_buff *skb)
 {
 	struct fc_frame_header *fh;
 	u16 old_xid;
 	u8 op;
+	u8 mac[ETH_ALEN];
 
 	fh = (struct fc_frame_header *)skb->data;
 	op = *(u8 *)(fh + 1);
@@ -531,14 +536,15 @@ int fcoe_ctlr_els_send(struct fcoe_ctlr *fip, struct sk_buff *skb)
 		 * FLOGI.
 		 */
 		fip->flogi_oxid = FC_XID_UNKNOWN;
-		fc_fcoe_set_mac(fip->data_src_addr, fh->fh_s_id);
+		fc_fcoe_set_mac(mac, fh->fh_d_id);
+		fip->update_mac(lport, mac);
 		return 0;
 	default:
 		if (fip->state != FIP_ST_ENABLED)
 			goto drop;
 		return 0;
 	}
-	if (fcoe_ctlr_encaps(fip, op, skb))
+	if (fcoe_ctlr_encaps(fip, lport, op, skb))
 		goto drop;
 	fip->send(fip, skb);
 	return -EINPROGRESS;
@@ -797,7 +803,7 @@ static void fcoe_ctlr_recv_els(struct fcoe_ctlr *fip, struct sk_buff *skb)
 {
 	struct fc_lport *lp = fip->lp;
 	struct fip_header *fiph;
-	struct fc_frame *fp;
+	struct fc_frame *fp = (struct fc_frame *)skb;
 	struct fc_frame_header *fh = NULL;
 	struct fip_desc *desc;
 	struct fip_encaps *els;
@@ -836,6 +842,7 @@ static void fcoe_ctlr_recv_els(struct fcoe_ctlr *fip, struct sk_buff *skb)
 						"in FIP ELS\n");
 				goto drop;
 			}
+			memcpy(fr_cb(fp)->granted_mac, granted_mac, ETH_ALEN);
 			break;
 		case FIP_DT_FLOGI:
 		case FIP_DT_FDISC:
@@ -866,13 +873,10 @@ static void fcoe_ctlr_recv_els(struct fcoe_ctlr *fip, struct sk_buff *skb)
 		goto drop;
 	els_op = *(u8 *)(fh + 1);
 
-	if ((els_dtype == FIP_DT_FLOGI || els_dtype == FIP_DT_FDISC) &&
-	    sub == FIP_SC_REP && fip->flogi_oxid == ntohs(fh->fh_ox_id) &&
-	    els_op == ELS_LS_ACC && is_valid_ether_addr(granted_mac)) {
+	if (els_dtype == FIP_DT_FLOGI && sub == FIP_SC_REP &&
+	    fip->flogi_oxid == ntohs(fh->fh_ox_id) &&
+	    els_op == ELS_LS_ACC && is_valid_ether_addr(granted_mac))
 		fip->flogi_oxid = FC_XID_UNKNOWN;
-		fip->update_mac(fip, fip->data_src_addr, granted_mac);
-		memcpy(fip->data_src_addr, granted_mac, ETH_ALEN);
-	}
 
 	/*
 	 * Convert skb into an fc_frame containing only the ELS.
@@ -959,7 +963,7 @@ static void fcoe_ctlr_recv_clr_vlink(struct fcoe_ctlr *fip,
 			if (dlen < sizeof(*vp))
 				return;
 			if (compare_ether_addr(vp->fd_mac,
-			    fip->data_src_addr) == 0 &&
+			    fip->get_src_addr(lp)) == 0 &&
 			    get_unaligned_be64(&vp->fd_wwpn) == lp->wwpn &&
 			    ntoh24(vp->fd_fc_id) == fc_host_port_id(lp->host))
 				desc_mask &= ~BIT(FIP_DT_VN_ID);
@@ -1114,8 +1118,6 @@ static void fcoe_ctlr_timeout(unsigned long arg)
 	struct fcoe_fcf *sel;
 	struct fcoe_fcf *fcf;
 	unsigned long next_timer = jiffies + msecs_to_jiffies(FIP_VN_KA_PERIOD);
-	u8 send_ctlr_ka;
-	u8 send_port_ka;
 
 	spin_lock_bh(&fip->lock);
 	if (fip->state == FIP_ST_DISABLED) {
@@ -1154,12 +1156,10 @@ static void fcoe_ctlr_timeout(unsigned long arg)
 		schedule_work(&fip->link_work);
 	}
 
-	send_ctlr_ka = 0;
-	send_port_ka = 0;
 	if (sel) {
 		if (time_after_eq(jiffies, fip->ctlr_ka_time)) {
 			fip->ctlr_ka_time = jiffies + sel->fka_period;
-			send_ctlr_ka = 1;
+			fip->send_ctlr_ka = 1;
 		}
 		if (time_after(next_timer, fip->ctlr_ka_time))
 			next_timer = fip->ctlr_ka_time;
@@ -1167,7 +1167,7 @@ static void fcoe_ctlr_timeout(unsigned long arg)
 		if (time_after_eq(jiffies, fip->port_ka_time)) {
 			fip->port_ka_time += jiffies +
 					msecs_to_jiffies(FIP_VN_KA_PERIOD);
-			send_port_ka = 1;
+			fip->send_port_ka = 1;
 		}
 		if (time_after(next_timer, fip->port_ka_time))
 			next_timer = fip->port_ka_time;
@@ -1177,12 +1177,9 @@ static void fcoe_ctlr_timeout(unsigned long arg)
 				msecs_to_jiffies(FCOE_CTLR_START_DELAY);
 		mod_timer(&fip->timer, next_timer);
 	}
+	if (fip->send_ctlr_ka || fip->send_port_ka)
+		schedule_work(&fip->link_work);
 	spin_unlock_bh(&fip->lock);
-
-	if (send_ctlr_ka)
-		fcoe_ctlr_send_keep_alive(fip, 0, fip->ctl_src_addr);
-	if (send_port_ka)
-		fcoe_ctlr_send_keep_alive(fip, 1, fip->data_src_addr);
 }
 
 /**
@@ -1197,6 +1194,8 @@ static void fcoe_ctlr_timeout(unsigned long arg)
 static void fcoe_ctlr_link_work(struct work_struct *work)
 {
 	struct fcoe_ctlr *fip;
+	struct fc_lport *vport;
+	u8 *mac;
 	int link;
 	int last_link;
 
@@ -1213,6 +1212,22 @@ static void fcoe_ctlr_link_work(struct work_struct *work)
 		else
 			fcoe_ctlr_reset(fip, FIP_ST_LINK_WAIT);
 	}
+
+	if (fip->send_ctlr_ka) {
+		fip->send_ctlr_ka = 0;
+		fcoe_ctlr_send_keep_alive(fip, NULL, 0, fip->ctl_src_addr);
+	}
+	if (fip->send_port_ka) {
+		fip->send_port_ka = 0;
+		mutex_lock(&fip->lp->lp_mutex);
+		mac = fip->get_src_addr(fip->lp);
+		fcoe_ctlr_send_keep_alive(fip, fip->lp, 1, mac);
+		list_for_each_entry(vport, &fip->lp->vports, list) {
+			mac = fip->get_src_addr(vport);
+			fcoe_ctlr_send_keep_alive(fip, vport, 1, mac);
+		}
+		mutex_unlock(&fip->lp->lp_mutex);
+	}
 }
 
 /**
@@ -1237,6 +1252,7 @@ static void fcoe_ctlr_recv_work(struct work_struct *recv_work)
 /**
  * fcoe_ctlr_recv_flogi() - snoop Pre-FIP receipt of FLOGI response or request.
  * @fip:	FCoE controller.
+ * @lport:	libfc fc_lport instance received on
  * @fp:		FC frame.
  * @sa:		Ethernet source MAC address from received FCoE frame.
  *
@@ -1249,7 +1265,8 @@ static void fcoe_ctlr_recv_work(struct work_struct *recv_work)
  *
  * Return non-zero if the frame should not be delivered to libfc.
  */
-int fcoe_ctlr_recv_flogi(struct fcoe_ctlr *fip, struct fc_frame *fp, u8 *sa)
+int fcoe_ctlr_recv_flogi(struct fcoe_ctlr *fip, struct fc_lport *lport,
+			 struct fc_frame *fp, u8 *sa)
 {
 	struct fc_frame_header *fh;
 	u8 op;
@@ -1284,11 +1301,9 @@ int fcoe_ctlr_recv_flogi(struct fcoe_ctlr *fip, struct fc_frame *fp, u8 *sa)
 			fip->map_dest = 0;
 		}
 		fip->flogi_oxid = FC_XID_UNKNOWN;
-		memcpy(mac, fip->data_src_addr, ETH_ALEN);
-		fc_fcoe_set_mac(fip->data_src_addr, fh->fh_d_id);
+		fc_fcoe_set_mac(mac, fh->fh_d_id);
+		fip->update_mac(lport, mac);
 		spin_unlock_bh(&fip->lock);
-
-		fip->update_mac(fip, mac, fip->data_src_addr);
 	} else if (op == ELS_FLOGI && fh->fh_r_ctl == FC_RCTL_ELS_REQ && sa) {
 		/*
 		 * Save source MAC for point-to-point responses.
@@ -1371,3 +1386,4 @@ int fcoe_libfc_config(struct fc_lport *lp, struct libfc_function_template *tt)
 	return 0;
 }
 EXPORT_SYMBOL_GPL(fcoe_libfc_config);
+
diff --git a/drivers/scsi/libfc/fc_elsct.c b/drivers/scsi/libfc/fc_elsct.c
index 5cfa687..01ab3d5 100644
--- a/drivers/scsi/libfc/fc_elsct.c
+++ b/drivers/scsi/libfc/fc_elsct.c
@@ -31,7 +31,7 @@
 /*
  * fc_elsct_send - sends ELS/CT frame
  */
-static struct fc_seq *fc_elsct_send(struct fc_lport *lport,
+struct fc_seq *fc_elsct_send(struct fc_lport *lport,
 				    u32 did,
 				    struct fc_frame *fp,
 				    unsigned int op,
@@ -61,6 +61,7 @@ static struct fc_seq *fc_elsct_send(struct fc_lport *lport,
 
 	return lport->tt.exch_seq_send(lport, fp, resp, NULL, arg, timer_msec);
 }
+EXPORT_SYMBOL(fc_elsct_send);
 
 int fc_elsct_init(struct fc_lport *lport)
 {
diff --git a/drivers/scsi/libfc/fc_lport.c b/drivers/scsi/libfc/fc_lport.c
index dd6a1db..720c02d 100644
--- a/drivers/scsi/libfc/fc_lport.c
+++ b/drivers/scsi/libfc/fc_lport.c
@@ -1317,7 +1317,7 @@ static void fc_lport_timeout(struct work_struct *work)
  * held, but it will lock, call an _enter_* function or fc_lport_error
  * and then unlock the lport.
  */
-static void fc_lport_logo_resp(struct fc_seq *sp, struct fc_frame *fp,
+void fc_lport_logo_resp(struct fc_seq *sp, struct fc_frame *fp,
 			       void *lp_arg)
 {
 	struct fc_lport *lport = lp_arg;
@@ -1354,6 +1354,7 @@ out:
 err:
 	mutex_unlock(&lport->lp_mutex);
 }
+EXPORT_SYMBOL(fc_lport_logo_resp);
 
 /**
  * fc_rport_enter_logo() - Logout of the fabric
@@ -1394,7 +1395,7 @@ static void fc_lport_enter_logo(struct fc_lport *lport)
  * held, but it will lock, call an _enter_* function or fc_lport_error
  * and then unlock the lport.
  */
-static void fc_lport_flogi_resp(struct fc_seq *sp, struct fc_frame *fp,
+void fc_lport_flogi_resp(struct fc_seq *sp, struct fc_frame *fp,
 				void *lp_arg)
 {
 	struct fc_lport *lport = lp_arg;
@@ -1477,6 +1478,7 @@ out:
 err:
 	mutex_unlock(&lport->lp_mutex);
 }
+EXPORT_SYMBOL(fc_lport_flogi_resp);
 
 /**
  * fc_rport_enter_flogi() - Send a FLOGI request to the fabric manager
diff --git a/include/scsi/fc_frame.h b/include/scsi/fc_frame.h
index c35d238..bfdb7aa 100644
--- a/include/scsi/fc_frame.h
+++ b/include/scsi/fc_frame.h
@@ -28,6 +28,8 @@
 #include <scsi/fc/fc_fcp.h>
 #include <scsi/fc/fc_encaps.h>
 
+#include <linux/if_ether.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.
@@ -64,6 +66,7 @@ struct fcoe_rcv_info {
 	enum fc_sof	fr_sof;		/* start of frame delimiter */
 	enum fc_eof	fr_eof;		/* end of frame delimiter */
 	u8		fr_flags;	/* flags - see below */
+	u8		granted_mac[ETH_ALEN]; /* FCoE MAC address */
 };
 
 
diff --git a/include/scsi/libfc.h b/include/scsi/libfc.h
index 015e520..3fadb07 100644
--- a/include/scsi/libfc.h
+++ b/include/scsi/libfc.h
@@ -900,6 +900,16 @@ void fc_fcp_destroy(struct fc_lport *);
  * Initializes ELS/CT interface
  */
 int fc_elsct_init(struct fc_lport *lp);
+struct fc_seq *fc_elsct_send(struct fc_lport *lport,
+				    u32 did,
+				    struct fc_frame *fp,
+				    unsigned int op,
+				    void (*resp)(struct fc_seq *,
+						 struct fc_frame *fp,
+						 void *arg),
+				    void *arg, u32 timer_msec);
+void fc_lport_flogi_resp(struct fc_seq *, struct fc_frame *, void *);
+void fc_lport_logo_resp(struct fc_seq *, struct fc_frame *, void *);
 
 
 /*
diff --git a/include/scsi/libfcoe.h b/include/scsi/libfcoe.h
index b241060..8ef5e20 100644
--- a/include/scsi/libfcoe.h
+++ b/include/scsi/libfcoe.h
@@ -74,11 +74,13 @@ enum fip_state {
  * @last_link:	last link state reported to libfc.
  * @map_dest:	use the FC_MAP mode for destination MAC addresses.
  * @spma:	supports SPMA server-provided MACs mode
+ * @send_ctlr_ka: need to send controller keep alive
+ * @send_port_ka: need to send port keep alives
  * @dest_addr:	MAC address of the selected FC forwarder.
  * @ctl_src_addr: the native MAC address of our local port.
- * @data_src_addr: the assigned MAC address for the local port after FLOGI.
  * @send:	LLD-supplied function to handle sending of FIP Ethernet frames.
  * @update_mac: LLD-supplied function to handle changes to MAC addresses.
+ * @get_src_addr: LLD-supplied function to supply a source MAC address.
  * @lock:	lock protecting this structure.
  *
  * This structure is used by all FCoE drivers.  It contains information
@@ -106,12 +108,14 @@ struct fcoe_ctlr {
 	u8 last_link;
 	u8 map_dest;
 	u8 spma;
+	u8 send_ctlr_ka;
+	u8 send_port_ka;
 	u8 dest_addr[ETH_ALEN];
 	u8 ctl_src_addr[ETH_ALEN];
-	u8 data_src_addr[ETH_ALEN];
 
 	void (*send)(struct fcoe_ctlr *, struct sk_buff *);
-	void (*update_mac)(struct fcoe_ctlr *, u8 *old, u8 *new);
+	void (*update_mac)(struct fc_lport *, u8 *addr);
+	u8 * (*get_src_addr)(struct fc_lport *);
 	spinlock_t lock;
 };
 
@@ -155,9 +159,10 @@ void fcoe_ctlr_init(struct fcoe_ctlr *);
 void fcoe_ctlr_destroy(struct fcoe_ctlr *);
 void fcoe_ctlr_link_up(struct fcoe_ctlr *);
 int fcoe_ctlr_link_down(struct fcoe_ctlr *);
-int fcoe_ctlr_els_send(struct fcoe_ctlr *, struct sk_buff *);
+int fcoe_ctlr_els_send(struct fcoe_ctlr *, struct fc_lport *, struct sk_buff *);
 void fcoe_ctlr_recv(struct fcoe_ctlr *, struct sk_buff *);
-int fcoe_ctlr_recv_flogi(struct fcoe_ctlr *, struct fc_frame *fp, u8 *sa);
+int fcoe_ctlr_recv_flogi(struct fcoe_ctlr *, struct fc_lport *lport,
+			 struct fc_frame *fp, u8 *sa);
 
 /* libfcoe funcs */
 u64 fcoe_wwn_from_mac(unsigned char mac[], unsigned int, unsigned int);

[PATCH 15/35] fcoe: add a separate scsi transport template for NPIV vports

[Robert Love]

From: Chris Leech <christopher.leech@intel.com>

Right now it's exactly the same as the physical port template,
and there is no way to create a port on anything other than the
netdev.  When the vport_create entry point gets hooked up it will
create lports on top of vport devices, which will use this.

Rename scsi_transport_fcoe_sw to fcoe_transport_template to be more
clear with naming now that there are two templates.

Signed-off-by: Chris Leech <christopher.leech@intel.com>
Signed-off-by: Robert Love <robert.w.love@intel.com>
---

 drivers/scsi/fcoe/fcoe.c |   54 ++++++++++++++++++++++++++++++++++++++++------
 1 files changed, 47 insertions(+), 7 deletions(-)

diff --git a/drivers/scsi/fcoe/fcoe.c b/drivers/scsi/fcoe/fcoe.c
index bfef723..0d7b3b1 100644
--- a/drivers/scsi/fcoe/fcoe.c
+++ b/drivers/scsi/fcoe/fcoe.c
@@ -90,7 +90,8 @@ static struct notifier_block fcoe_notifier = {
 	.notifier_call = fcoe_device_notification,
 };
 
-static struct scsi_transport_template *scsi_transport_fcoe_sw;
+static struct scsi_transport_template *fcoe_transport_template;
+static struct scsi_transport_template *fcoe_vport_transport_template;
 
 struct fc_function_template fcoe_transport_function = {
 	.show_host_node_name = 1,
@@ -125,6 +126,39 @@ struct fc_function_template fcoe_transport_function = {
 	.terminate_rport_io = fc_rport_terminate_io,
 };
 
+struct fc_function_template fcoe_vport_transport_function = {
+	.show_host_node_name = 1,
+	.show_host_port_name = 1,
+	.show_host_supported_classes = 1,
+	.show_host_supported_fc4s = 1,
+	.show_host_active_fc4s = 1,
+	.show_host_maxframe_size = 1,
+
+	.show_host_port_id = 1,
+	.show_host_supported_speeds = 1,
+	.get_host_speed = fc_get_host_speed,
+	.show_host_speed = 1,
+	.show_host_port_type = 1,
+	.get_host_port_state = fc_get_host_port_state,
+	.show_host_port_state = 1,
+	.show_host_symbolic_name = 1,
+
+	.dd_fcrport_size = sizeof(struct fc_rport_libfc_priv),
+	.show_rport_maxframe_size = 1,
+	.show_rport_supported_classes = 1,
+
+	.show_host_fabric_name = 1,
+	.show_starget_node_name = 1,
+	.show_starget_port_name = 1,
+	.show_starget_port_id = 1,
+	.set_rport_dev_loss_tmo = fc_set_rport_loss_tmo,
+	.show_rport_dev_loss_tmo = 1,
+	.get_fc_host_stats = fc_get_host_stats,
+	.issue_fc_host_lip = fcoe_reset,
+
+	.terminate_rport_io = fc_rport_terminate_io,
+};
+
 static struct scsi_host_template fcoe_shost_template = {
 	.module = THIS_MODULE,
 	.name = "FCoE Driver",
@@ -508,7 +542,10 @@ static int fcoe_shost_config(struct fc_lport *lp, struct Scsi_Host *shost,
 	lp->host->max_lun = FCOE_MAX_LUN;
 	lp->host->max_id = FCOE_MAX_FCP_TARGET;
 	lp->host->max_channel = 0;
-	lp->host->transportt = scsi_transport_fcoe_sw;
+	if (lp->vport)
+		lp->host->transportt = fcoe_vport_transport_template;
+	else
+		lp->host->transportt = fcoe_transport_template;
 
 	/* add the new host to the SCSI-ml */
 	rc = scsi_add_host(lp->host, dev);
@@ -814,10 +851,11 @@ out:
 static int __init fcoe_if_init(void)
 {
 	/* attach to scsi transport */
-	scsi_transport_fcoe_sw =
-		fc_attach_transport(&fcoe_transport_function);
+	fcoe_transport_template = fc_attach_transport(&fcoe_transport_function);
+	fcoe_vport_transport_template =
+		fc_attach_transport(&fcoe_vport_transport_function);
 
-	if (!scsi_transport_fcoe_sw) {
+	if (!fcoe_transport_template) {
 		printk(KERN_ERR "fcoe: Failed to attach to the FC transport\n");
 		return -ENODEV;
 	}
@@ -832,8 +870,10 @@ static int __init fcoe_if_init(void)
  */
 int __exit fcoe_if_exit(void)
 {
-	fc_release_transport(scsi_transport_fcoe_sw);
-	scsi_transport_fcoe_sw = NULL;
+	fc_release_transport(fcoe_transport_template);
+	fc_release_transport(fcoe_vport_transport_template);
+	fcoe_transport_template = NULL;
+	fcoe_vport_transport_template = NULL;
 	return 0;
 }
 

[PATCH 16/35] fcoe: NPIV vport create/destroy

[Robert Love]

From: Chris Leech <christopher.leech@intel.com>

Add NPIV vport create and destroy handlers and register them with the
FC transport.

Signed-off-by: Chris Leech <christopher.leech@intel.com>
Signed-off-by: Robert Love <robert.w.love@intel.com>
---

 drivers/scsi/fcoe/fcoe.c |  162 +++++++++++++++++++++++++++++++++++++++-------
 1 files changed, 139 insertions(+), 23 deletions(-)

diff --git a/drivers/scsi/fcoe/fcoe.c b/drivers/scsi/fcoe/fcoe.c
index 0d7b3b1..e894c73 100644
--- a/drivers/scsi/fcoe/fcoe.c
+++ b/drivers/scsi/fcoe/fcoe.c
@@ -93,6 +93,10 @@ static struct notifier_block fcoe_notifier = {
 static struct scsi_transport_template *fcoe_transport_template;
 static struct scsi_transport_template *fcoe_vport_transport_template;
 
+static int fcoe_vport_destroy(struct fc_vport *vport);
+static int fcoe_vport_create(struct fc_vport *vport, bool disabled);
+static int fcoe_vport_disable(struct fc_vport *vport, bool disable);
+
 struct fc_function_template fcoe_transport_function = {
 	.show_host_node_name = 1,
 	.show_host_port_name = 1,
@@ -124,6 +128,10 @@ struct fc_function_template fcoe_transport_function = {
 	.issue_fc_host_lip = fcoe_reset,
 
 	.terminate_rport_io = fc_rport_terminate_io,
+
+	.vport_create = fcoe_vport_create,
+	.vport_delete = fcoe_vport_destroy,
+	.vport_disable = fcoe_vport_disable,
 };
 
 struct fc_function_template fcoe_vport_transport_function = {
@@ -432,6 +440,7 @@ static int fcoe_lport_config(struct fc_lport *lp)
 	lp->r_a_tov = 2 * 2 * 1000;
 	lp->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS |
 			      FCP_SPPF_RETRY | FCP_SPPF_CONF_COMPL);
+	lp->does_npiv = 1;
 
 	fc_lport_init_stats(lp);
 
@@ -514,11 +523,13 @@ static int fcoe_netdev_config(struct fc_lport *lp, struct net_device *netdev)
 	port->fcoe_pending_queue_active = 0;
 	setup_timer(&port->timer, fcoe_queue_timer, (unsigned long)lp);
 
-	wwnn = fcoe_wwn_from_mac(netdev->dev_addr, 1, 0);
-	fc_set_wwnn(lp, wwnn);
-	/* XXX - 3rd arg needs to be vlan id */
-	wwpn = fcoe_wwn_from_mac(netdev->dev_addr, 2, 0);
-	fc_set_wwpn(lp, wwpn);
+	if (!lp->vport) {
+		wwnn = fcoe_wwn_from_mac(netdev->dev_addr, 1, 0);
+		fc_set_wwnn(lp, wwnn);
+		/* XXX - 3rd arg needs to be vlan id */
+		wwpn = fcoe_wwn_from_mac(netdev->dev_addr, 2, 0);
+		fc_set_wwpn(lp, wwpn);
+	}
 
 	return 0;
 }
@@ -554,6 +565,10 @@ static int fcoe_shost_config(struct fc_lport *lp, struct Scsi_Host *shost,
 				"error on scsi_add_host\n");
 		return rc;
 	}
+
+	if (!lp->vport)
+		fc_host_max_npiv_vports(lp->host) = USHORT_MAX;
+
 	sprintf(fc_host_symbolic_name(lp->host), "%s v%s over %s",
 		FCOE_NAME, FCOE_VERSION,
 		fcoe_netdev(lp)->name);
@@ -754,24 +769,35 @@ static struct libfc_function_template fcoe_libfc_fcn_templ = {
  * fcoe_if_create() - this function creates the fcoe port
  * @fcoe: fcoe_interface structure to create an fc_lport instance on
  * @parent: device pointer to be the parent in sysfs for the SCSI host
+ * @npiv: is this a vport?
  *
  * Creates fc_lport struct and scsi_host for lport, configures lport.
  *
  * Returns : The allocated fc_lport or an error pointer
  */
 static struct fc_lport *fcoe_if_create(struct fcoe_interface *fcoe,
-				       struct device *parent)
+				       struct device *parent, int npiv)
 {
 	int rc;
 	struct fc_lport *lport = NULL;
 	struct fcoe_port *port;
 	struct Scsi_Host *shost;
 	struct net_device *netdev = fcoe->netdev;
+	/*
+	 * parent is only a vport if npiv is 1,
+	 * but we'll only use vport in that case so go ahead and set it
+	 */
+	struct fc_vport *vport = dev_to_vport(parent);
 
 	FCOE_NETDEV_DBG(netdev, "Create Interface\n");
 
-	lport = libfc_host_alloc(&fcoe_shost_template,
-				 sizeof(struct fcoe_port));
+	if (!npiv) {
+		lport = libfc_host_alloc(&fcoe_shost_template,
+					 sizeof(struct fcoe_port));
+	} else	{
+		lport = libfc_vport_create(vport,
+					   sizeof(struct fcoe_port));
+	}
 	if (!lport) {
 		FCOE_NETDEV_DBG(netdev, "Could not allocate host structure\n");
 		rc = -ENOMEM;
@@ -791,6 +817,13 @@ static struct fc_lport *fcoe_if_create(struct fcoe_interface *fcoe,
 		goto out_host_put;
 	}
 
+	if (npiv) {
+		FCOE_NETDEV_DBG(netdev, "Setting vport names, 0x%llX 0x%llX\n",
+			vport->node_name, vport->port_name);
+		fc_set_wwnn(lport, vport->node_name);
+		fc_set_wwpn(lport, vport->port_name);
+	}
+
 	/* configure lport network properties */
 	rc = fcoe_netdev_config(lport, netdev);
 	if (rc) {
@@ -815,21 +848,24 @@ static struct fc_lport *fcoe_if_create(struct fcoe_interface *fcoe,
 		goto out_lp_destroy;
 	}
 
-	/*
-	 * fcoe_em_alloc() and fcoe_hostlist_add() both
-	 * need to be atomic with respect to other changes to the hostlist
-	 * since fcoe_em_alloc() looks for an existing EM
-	 * instance on host list updated by fcoe_hostlist_add().
-	 *
-	 * This is currently handled through the fcoe_config_mutex begin held.
-	 */
+	if (!npiv) {
+		/*
+		 * fcoe_em_alloc() and fcoe_hostlist_add() both
+		 * need to be atomic with respect to other changes to the
+		 * hostlist since fcoe_em_alloc() looks for an existing EM
+		 * instance on host list updated by fcoe_hostlist_add().
+		 *
+		 * This is currently handled through the fcoe_config_mutex
+		 * begin held.
+		 */
 
-	/* lport exch manager allocation */
-	rc = fcoe_em_config(lport);
-	if (rc) {
-		FCOE_NETDEV_DBG(netdev, "Could not configure the EM for the "
-				"interface\n");
-		goto out_lp_destroy;
+		/* lport exch manager allocation */
+		rc = fcoe_em_config(lport);
+		if (rc) {
+			FCOE_NETDEV_DBG(netdev, "Could not configure the EM "
+						"for the interface\n");
+			goto out_lp_destroy;
+		}
 	}
 
 	fcoe_interface_get(fcoe);
@@ -1783,7 +1819,7 @@ static int fcoe_create(const char *buffer, struct kernel_param *kp)
 		goto out_putdev;
 	}
 
-	lport = fcoe_if_create(fcoe, &netdev->dev);
+	lport = fcoe_if_create(fcoe, &netdev->dev, 0);
 	if (IS_ERR(lport)) {
 		printk(KERN_ERR "fcoe: Failed to create interface (%s)\n",
 		       netdev->name);
@@ -2090,6 +2126,9 @@ static void __exit fcoe_exit(void)
 	/* flush any asyncronous interface destroys,
 	 * this should happen after the netdev notifier is unregistered */
 	flush_scheduled_work();
+	/* That will flush out all the N_Ports on the hostlist, but now we
+	 * may have NPIV VN_Ports scheduled for destruction */
+	flush_scheduled_work();
 
 	/* detach from scsi transport
 	 * must happen after all destroys are done, therefor after the flush */
@@ -2187,3 +2226,80 @@ static struct fc_seq *fcoe_elsct_send(struct fc_lport *lport,
 	return fc_elsct_send(lport, did, fp, op, resp, arg, timeout);
 }
 
+/**
+ * fcoe_vport_create() - create an fc_host/scsi_host for a vport
+ * @vport: fc_vport object to create a new fc_host for
+ * @disabled: start the new fc_host in a disabled state by default?
+ *
+ * Returns: 0 for success
+ */
+static int fcoe_vport_create(struct fc_vport *vport, bool disabled)
+{
+	struct Scsi_Host *shost = vport_to_shost(vport);
+	struct fc_lport *n_port = shost_priv(shost);
+	struct fcoe_port *port = lport_priv(n_port);
+	struct fcoe_interface *fcoe = port->fcoe;
+	struct net_device *netdev = fcoe->netdev;
+	struct fc_lport *vn_port;
+
+	mutex_lock(&fcoe_config_mutex);
+	vn_port = fcoe_if_create(fcoe, &vport->dev, 1);
+	mutex_unlock(&fcoe_config_mutex);
+
+	if (IS_ERR(vn_port)) {
+		printk(KERN_ERR "fcoe: fcoe_vport_create(%s) failed\n",
+		       netdev->name);
+		return -EIO;
+	}
+
+	if (disabled) {
+		fc_vport_set_state(vport, FC_VPORT_DISABLED);
+	} else {
+		vn_port->boot_time = jiffies;
+		fc_fabric_login(vn_port);
+		fc_vport_setlink(vn_port);
+	}
+	return 0;
+}
+
+/**
+ * fcoe_vport_destroy() - destroy the fc_host/scsi_host for a vport
+ * @vport: fc_vport object that is being destroyed
+ *
+ * Returns: 0 for success
+ */
+static int fcoe_vport_destroy(struct fc_vport *vport)
+{
+	struct Scsi_Host *shost = vport_to_shost(vport);
+	struct fc_lport *n_port = shost_priv(shost);
+	struct fc_lport *vn_port = vport->dd_data;
+	struct fcoe_port *port = lport_priv(vn_port);
+
+	mutex_lock(&n_port->lp_mutex);
+	list_del(&vn_port->list);
+	mutex_unlock(&n_port->lp_mutex);
+	schedule_work(&port->destroy_work);
+	return 0;
+}
+
+/**
+ * fcoe_vport_disable() - change vport state
+ * @vport: vport to bring online/offline
+ * @disable: should the vport be disabled?
+ */
+static int fcoe_vport_disable(struct fc_vport *vport, bool disable)
+{
+	struct fc_lport *lport = vport->dd_data;
+
+	if (disable) {
+		fc_vport_set_state(vport, FC_VPORT_DISABLED);
+		fc_fabric_logoff(lport);
+	} else {
+		lport->boot_time = jiffies;
+		fc_fabric_login(lport);
+		fc_vport_setlink(lport);
+	}
+
+	return 0;
+}
+

[PATCH 17/35] libfc: RPN_ID is obsolete and unnecessary

[Robert Love]

From: Chris Leech <christopher.leech@intel.com>

RPN_ID has been obsolete per FC-GS-5 for several years.  The port name is
registered implicitly as part of FLOGI, and it is undesirable for ports to
change a registered port name using RPN_ID while logged into the fabric.

Signed-off-by: Chris Leech <christopher.leech@intel.com>
Signed-off-by: Robert Love <robert.w.love@intel.com>
---

 drivers/scsi/libfc/fc_lport.c |   95 +----------------------------------------
 include/scsi/libfc.h          |    1 
 2 files changed, 3 insertions(+), 93 deletions(-)

diff --git a/drivers/scsi/libfc/fc_lport.c b/drivers/scsi/libfc/fc_lport.c
index 720c02d..84c6d49 100644
--- a/drivers/scsi/libfc/fc_lport.c
+++ b/drivers/scsi/libfc/fc_lport.c
@@ -108,7 +108,6 @@ static void fc_lport_error(struct fc_lport *, struct fc_frame *);
 static void fc_lport_enter_reset(struct fc_lport *);
 static void fc_lport_enter_flogi(struct fc_lport *);
 static void fc_lport_enter_dns(struct fc_lport *);
-static void fc_lport_enter_rpn_id(struct fc_lport *);
 static void fc_lport_enter_rft_id(struct fc_lport *);
 static void fc_lport_enter_scr(struct fc_lport *);
 static void fc_lport_enter_ready(struct fc_lport *);
@@ -118,7 +117,6 @@ static const char *fc_lport_state_names[] = {
 	[LPORT_ST_DISABLED] = "disabled",
 	[LPORT_ST_FLOGI] =    "FLOGI",
 	[LPORT_ST_DNS] =      "dNS",
-	[LPORT_ST_RPN_ID] =   "RPN_ID",
 	[LPORT_ST_RFT_ID] =   "RFT_ID",
 	[LPORT_ST_SCR] =      "SCR",
 	[LPORT_ST_READY] =    "Ready",
@@ -153,7 +151,7 @@ static void fc_lport_rport_callback(struct fc_lport *lport,
 	case RPORT_EV_READY:
 		if (lport->state == LPORT_ST_DNS) {
 			lport->dns_rp = rdata;
-			fc_lport_enter_rpn_id(lport);
+			fc_lport_enter_rft_id(lport);
 		} else {
 			FC_LPORT_DBG(lport, "Received an READY event "
 				     "on port (%6x) for the directory "
@@ -965,7 +963,6 @@ static void fc_lport_error(struct fc_lport *lport, struct fc_frame *fp)
 			case LPORT_ST_DISABLED:
 			case LPORT_ST_READY:
 			case LPORT_ST_RESET:
-			case LPORT_ST_RPN_ID:
 			case LPORT_ST_RFT_ID:
 			case LPORT_ST_SCR:
 			case LPORT_ST_DNS:
@@ -980,8 +977,8 @@ static void fc_lport_error(struct fc_lport *lport, struct fc_frame *fp)
 
 /**
  * fc_lport_rft_id_resp() - Handle response to Register Fibre
- *			    Channel Types by ID (RPN_ID) request
- * @sp: current sequence in RPN_ID exchange
+ *			    Channel Types by ID (RFT_ID) request
+ * @sp: current sequence in RFT_ID exchange
  * @fp: response frame
  * @lp_arg: Fibre Channel host port instance
  *
@@ -1033,60 +1030,6 @@ err:
 }
 
 /**
- * fc_lport_rpn_id_resp() - Handle response to Register Port
- *			    Name by ID (RPN_ID) request
- * @sp: current sequence in RPN_ID exchange
- * @fp: response frame
- * @lp_arg: Fibre Channel host port instance
- *
- * Locking Note: This function will be called without the lport lock
- * held, but it will lock, call an _enter_* function or fc_lport_error
- * and then unlock the lport.
- */
-static void fc_lport_rpn_id_resp(struct fc_seq *sp, struct fc_frame *fp,
-				 void *lp_arg)
-{
-	struct fc_lport *lport = lp_arg;
-	struct fc_frame_header *fh;
-	struct fc_ct_hdr *ct;
-
-	FC_LPORT_DBG(lport, "Received a RPN_ID %s\n", fc_els_resp_type(fp));
-
-	if (fp == ERR_PTR(-FC_EX_CLOSED))
-		return;
-
-	mutex_lock(&lport->lp_mutex);
-
-	if (lport->state != LPORT_ST_RPN_ID) {
-		FC_LPORT_DBG(lport, "Received a RPN_ID response, but in state "
-			     "%s\n", fc_lport_state(lport));
-		if (IS_ERR(fp))
-			goto err;
-		goto out;
-	}
-
-	if (IS_ERR(fp)) {
-		fc_lport_error(lport, fp);
-		goto err;
-	}
-
-	fh = fc_frame_header_get(fp);
-	ct = fc_frame_payload_get(fp, sizeof(*ct));
-	if (fh && ct && fh->fh_type == FC_TYPE_CT &&
-	    ct->ct_fs_type == FC_FST_DIR &&
-	    ct->ct_fs_subtype == FC_NS_SUBTYPE &&
-	    ntohs(ct->ct_cmd) == FC_FS_ACC)
-		fc_lport_enter_rft_id(lport);
-	else
-		fc_lport_error(lport, fp);
-
-out:
-	fc_frame_free(fp);
-err:
-	mutex_unlock(&lport->lp_mutex);
-}
-
-/**
  * fc_lport_scr_resp() - Handle response to State Change Register (SCR) request
  * @sp: current sequence in SCR exchange
  * @fp: response frame
@@ -1203,35 +1146,6 @@ static void fc_lport_enter_rft_id(struct fc_lport *lport)
 		fc_lport_error(lport, fp);
 }
 
-/**
- * fc_rport_enter_rft_id() - Register port name with the name server
- * @lport: Fibre Channel local port to register
- *
- * Locking Note: The lport lock is expected to be held before calling
- * this routine.
- */
-static void fc_lport_enter_rpn_id(struct fc_lport *lport)
-{
-	struct fc_frame *fp;
-
-	FC_LPORT_DBG(lport, "Entered RPN_ID state from %s state\n",
-		     fc_lport_state(lport));
-
-	fc_lport_state_enter(lport, LPORT_ST_RPN_ID);
-
-	fp = fc_frame_alloc(lport, sizeof(struct fc_ct_hdr) +
-			    sizeof(struct fc_ns_rn_id));
-	if (!fp) {
-		fc_lport_error(lport, fp);
-		return;
-	}
-
-	if (!lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, FC_NS_RPN_ID,
-				  fc_lport_rpn_id_resp,
-				  lport, lport->e_d_tov))
-		fc_lport_error(lport, fp);
-}
-
 static struct fc_rport_operations fc_lport_rport_ops = {
 	.event_callback = fc_lport_rport_callback,
 };
@@ -1290,9 +1204,6 @@ static void fc_lport_timeout(struct work_struct *work)
 	case LPORT_ST_DNS:
 		fc_lport_enter_dns(lport);
 		break;
-	case LPORT_ST_RPN_ID:
-		fc_lport_enter_rpn_id(lport);
-		break;
 	case LPORT_ST_RFT_ID:
 		fc_lport_enter_rft_id(lport);
 		break;
diff --git a/include/scsi/libfc.h b/include/scsi/libfc.h
index 3fadb07..ea81dec 100644
--- a/include/scsi/libfc.h
+++ b/include/scsi/libfc.h
@@ -61,7 +61,6 @@ enum fc_lport_state {
 	LPORT_ST_DISABLED = 0,
 	LPORT_ST_FLOGI,
 	LPORT_ST_DNS,
-	LPORT_ST_RPN_ID,
 	LPORT_ST_RFT_ID,
 	LPORT_ST_SCR,
 	LPORT_ST_READY,

[PATCH 18/35] libfc: RNN_ID may be required before RSNN_NN with some switches

[Robert Love]

From: Chris Leech <christopher.leech@intel.com>

One could interpret FC-GS-5 to say that an explicit RNN_ID is required
before RSNN_NN is allowed to succeed, which is why RNN_ID was not obsoleted
along with RPN_ID acording to this document:
ftp://ftp.t11.org/t11/member/fc/gs-5/05-546v2.pdf

Signed-off-by: Chris Leech <christopher.leech@intel.com>
Signed-off-by: Robert Love <robert.w.love@intel.com>
---

 drivers/scsi/libfc/fc_lport.c |   91 +++++++++++++++++++++++++++++++++++++++++
 include/scsi/fc_encode.h      |    4 +-
 include/scsi/libfc.h          |    1 
 3 files changed, 93 insertions(+), 3 deletions(-)

diff --git a/drivers/scsi/libfc/fc_lport.c b/drivers/scsi/libfc/fc_lport.c
index 84c6d49..5b2f75f 100644
--- a/drivers/scsi/libfc/fc_lport.c
+++ b/drivers/scsi/libfc/fc_lport.c
@@ -108,6 +108,7 @@ static void fc_lport_error(struct fc_lport *, struct fc_frame *);
 static void fc_lport_enter_reset(struct fc_lport *);
 static void fc_lport_enter_flogi(struct fc_lport *);
 static void fc_lport_enter_dns(struct fc_lport *);
+static void fc_lport_enter_rnn_id(struct fc_lport *);
 static void fc_lport_enter_rft_id(struct fc_lport *);
 static void fc_lport_enter_scr(struct fc_lport *);
 static void fc_lport_enter_ready(struct fc_lport *);
@@ -117,6 +118,7 @@ static const char *fc_lport_state_names[] = {
 	[LPORT_ST_DISABLED] = "disabled",
 	[LPORT_ST_FLOGI] =    "FLOGI",
 	[LPORT_ST_DNS] =      "dNS",
+	[LPORT_ST_RNN_ID] =   "RNN_ID",
 	[LPORT_ST_RFT_ID] =   "RFT_ID",
 	[LPORT_ST_SCR] =      "SCR",
 	[LPORT_ST_READY] =    "Ready",
@@ -151,7 +153,7 @@ static void fc_lport_rport_callback(struct fc_lport *lport,
 	case RPORT_EV_READY:
 		if (lport->state == LPORT_ST_DNS) {
 			lport->dns_rp = rdata;
-			fc_lport_enter_rft_id(lport);
+			fc_lport_enter_rnn_id(lport);
 		} else {
 			FC_LPORT_DBG(lport, "Received an READY event "
 				     "on port (%6x) for the directory "
@@ -963,6 +965,7 @@ static void fc_lport_error(struct fc_lport *lport, struct fc_frame *fp)
 			case LPORT_ST_DISABLED:
 			case LPORT_ST_READY:
 			case LPORT_ST_RESET:
+			case LPORT_ST_RNN_ID:
 			case LPORT_ST_RFT_ID:
 			case LPORT_ST_SCR:
 			case LPORT_ST_DNS:
@@ -1030,6 +1033,60 @@ err:
 }
 
 /**
+ * fc_lport_rnn_id_resp() - Handle response to Register Node
+ *			    Name by ID (RNN_ID) request
+ * @sp: current sequence in RNN_ID exchange
+ * @fp: response frame
+ * @lp_arg: Fibre Channel host port instance
+ *
+ * Locking Note: This function will be called without the lport lock
+ * held, but it will lock, call an _enter_* function or fc_lport_error
+ * and then unlock the lport.
+ */
+static void fc_lport_rnn_id_resp(struct fc_seq *sp, struct fc_frame *fp,
+				 void *lp_arg)
+{
+	struct fc_lport *lport = lp_arg;
+	struct fc_frame_header *fh;
+	struct fc_ct_hdr *ct;
+
+	FC_LPORT_DBG(lport, "Received a RNN_ID %s\n", fc_els_resp_type(fp));
+
+	if (fp == ERR_PTR(-FC_EX_CLOSED))
+		return;
+
+	mutex_lock(&lport->lp_mutex);
+
+	if (lport->state != LPORT_ST_RNN_ID) {
+		FC_LPORT_DBG(lport, "Received a RNN_ID response, but in state "
+			     "%s\n", fc_lport_state(lport));
+		if (IS_ERR(fp))
+			goto err;
+		goto out;
+	}
+
+	if (IS_ERR(fp)) {
+		fc_lport_error(lport, fp);
+		goto err;
+	}
+
+	fh = fc_frame_header_get(fp);
+	ct = fc_frame_payload_get(fp, sizeof(*ct));
+	if (fh && ct && fh->fh_type == FC_TYPE_CT &&
+	    ct->ct_fs_type == FC_FST_DIR &&
+	    ct->ct_fs_subtype == FC_NS_SUBTYPE &&
+	    ntohs(ct->ct_cmd) == FC_FS_ACC)
+		fc_lport_enter_rft_id(lport);
+	else
+		fc_lport_error(lport, fp);
+
+out:
+	fc_frame_free(fp);
+err:
+	mutex_unlock(&lport->lp_mutex);
+}
+
+/**
  * fc_lport_scr_resp() - Handle response to State Change Register (SCR) request
  * @sp: current sequence in SCR exchange
  * @fp: response frame
@@ -1146,6 +1203,35 @@ static void fc_lport_enter_rft_id(struct fc_lport *lport)
 		fc_lport_error(lport, fp);
 }
 
+/**
+ * fc_rport_enter_rnn_id() - Register node name with the name server
+ * @lport: Fibre Channel local port to register
+ *
+ * Locking Note: The lport lock is expected to be held before calling
+ * this routine.
+ */
+static void fc_lport_enter_rnn_id(struct fc_lport *lport)
+{
+	struct fc_frame *fp;
+
+	FC_LPORT_DBG(lport, "Entered RNN_ID state from %s state\n",
+		     fc_lport_state(lport));
+
+	fc_lport_state_enter(lport, LPORT_ST_RNN_ID);
+
+	fp = fc_frame_alloc(lport, sizeof(struct fc_ct_hdr) +
+			    sizeof(struct fc_ns_rn_id));
+	if (!fp) {
+		fc_lport_error(lport, fp);
+		return;
+	}
+
+	if (!lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, FC_NS_RNN_ID,
+				  fc_lport_rnn_id_resp,
+				  lport, lport->e_d_tov))
+		fc_lport_error(lport, fp);
+}
+
 static struct fc_rport_operations fc_lport_rport_ops = {
 	.event_callback = fc_lport_rport_callback,
 };
@@ -1204,6 +1290,9 @@ static void fc_lport_timeout(struct work_struct *work)
 	case LPORT_ST_DNS:
 		fc_lport_enter_dns(lport);
 		break;
+	case LPORT_ST_RNN_ID:
+		fc_lport_enter_rnn_id(lport);
+		break;
 	case LPORT_ST_RFT_ID:
 		fc_lport_enter_rft_id(lport);
 		break;
diff --git a/include/scsi/fc_encode.h b/include/scsi/fc_encode.h
index c93ca3e..ad13cb1 100644
--- a/include/scsi/fc_encode.h
+++ b/include/scsi/fc_encode.h
@@ -128,12 +128,12 @@ static inline int fc_ct_fill(struct fc_lport *lport,
 		ct->payload.rft.fts = lport->fcts;
 		break;
 
-	case FC_NS_RPN_ID:
+	case FC_NS_RNN_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);
+		put_unaligned_be64(lport->wwnn, &ct->payload.rn.fr_wwn);
 		break;
 
 	default:
diff --git a/include/scsi/libfc.h b/include/scsi/libfc.h
index ea81dec..ad90857 100644
--- a/include/scsi/libfc.h
+++ b/include/scsi/libfc.h
@@ -61,6 +61,7 @@ enum fc_lport_state {
 	LPORT_ST_DISABLED = 0,
 	LPORT_ST_FLOGI,
 	LPORT_ST_DNS,
+	LPORT_ST_RNN_ID,
 	LPORT_ST_RFT_ID,
 	LPORT_ST_SCR,
 	LPORT_ST_READY,

[PATCH 19/35] libfc: Register Symbolic Node Name (RSNN_NN)

[Robert Love]

From: Chris Leech <christopher.leech@intel.com>

Register the fc_host symbolic name as the symbolic node name
with the fabric name server.

Signed-off-by: Chris Leech <christopher.leech@intel.com>
Signed-off-by: Robert Love <robert.w.love@intel.com>
---

 drivers/scsi/fcoe/fcoe.c      |    6 +--
 drivers/scsi/libfc/fc_lport.c |   91 +++++++++++++++++++++++++++++++++++++++++
 include/scsi/fc/fc_ns.h       |   10 +++++
 include/scsi/fc_encode.h      |   10 +++++
 include/scsi/libfc.h          |    1 
 5 files changed, 115 insertions(+), 3 deletions(-)

diff --git a/drivers/scsi/fcoe/fcoe.c b/drivers/scsi/fcoe/fcoe.c
index e894c73..6bf396f 100644
--- a/drivers/scsi/fcoe/fcoe.c
+++ b/drivers/scsi/fcoe/fcoe.c
@@ -569,9 +569,9 @@ static int fcoe_shost_config(struct fc_lport *lp, struct Scsi_Host *shost,
 	if (!lp->vport)
 		fc_host_max_npiv_vports(lp->host) = USHORT_MAX;
 
-	sprintf(fc_host_symbolic_name(lp->host), "%s v%s over %s",
-		FCOE_NAME, FCOE_VERSION,
-		fcoe_netdev(lp)->name);
+	snprintf(fc_host_symbolic_name(lp->host), FC_SYMBOLIC_NAME_SIZE,
+		 "%s v%s over %s", FCOE_NAME, FCOE_VERSION,
+		 fcoe_netdev(lp)->name);
 
 	return 0;
 }
diff --git a/drivers/scsi/libfc/fc_lport.c b/drivers/scsi/libfc/fc_lport.c
index 5b2f75f..ae5e2c3 100644
--- a/drivers/scsi/libfc/fc_lport.c
+++ b/drivers/scsi/libfc/fc_lport.c
@@ -109,6 +109,7 @@ static void fc_lport_enter_reset(struct fc_lport *);
 static void fc_lport_enter_flogi(struct fc_lport *);
 static void fc_lport_enter_dns(struct fc_lport *);
 static void fc_lport_enter_rnn_id(struct fc_lport *);
+static void fc_lport_enter_rsnn_nn(struct fc_lport *);
 static void fc_lport_enter_rft_id(struct fc_lport *);
 static void fc_lport_enter_scr(struct fc_lport *);
 static void fc_lport_enter_ready(struct fc_lport *);
@@ -119,6 +120,7 @@ static const char *fc_lport_state_names[] = {
 	[LPORT_ST_FLOGI] =    "FLOGI",
 	[LPORT_ST_DNS] =      "dNS",
 	[LPORT_ST_RNN_ID] =   "RNN_ID",
+	[LPORT_ST_RSNN_NN] =  "RSNN_NN",
 	[LPORT_ST_RFT_ID] =   "RFT_ID",
 	[LPORT_ST_SCR] =      "SCR",
 	[LPORT_ST_READY] =    "Ready",
@@ -966,6 +968,7 @@ static void fc_lport_error(struct fc_lport *lport, struct fc_frame *fp)
 			case LPORT_ST_READY:
 			case LPORT_ST_RESET:
 			case LPORT_ST_RNN_ID:
+			case LPORT_ST_RSNN_NN:
 			case LPORT_ST_RFT_ID:
 			case LPORT_ST_SCR:
 			case LPORT_ST_DNS:
@@ -1033,6 +1036,60 @@ err:
 }
 
 /**
+ * fc_lport_rsnn_nn_resp() - Handle response to Register Symbolic Node Name
+ *			     by Node Name (RSNN_NN) request
+ * @sp: current sequence in RSNN_NN exchange
+ * @fp: response frame
+ * @lp_arg: Fibre Channel host port instance
+ *
+ * Locking Note: This function will be called without the lport lock
+ * held, but it will lock, call an _enter_* function or fc_lport_error
+ * and then unlock the lport.
+ */
+static void fc_lport_rsnn_nn_resp(struct fc_seq *sp, struct fc_frame *fp,
+				  void *lp_arg)
+{
+	struct fc_lport *lport = lp_arg;
+	struct fc_frame_header *fh;
+	struct fc_ct_hdr *ct;
+
+	FC_LPORT_DBG(lport, "Received a RSNN_NN %s\n", fc_els_resp_type(fp));
+
+	if (fp == ERR_PTR(-FC_EX_CLOSED))
+		return;
+
+	mutex_lock(&lport->lp_mutex);
+
+	if (lport->state != LPORT_ST_RSNN_NN) {
+		FC_LPORT_DBG(lport, "Received a RSNN_NN response, but in state "
+			     "%s\n", fc_lport_state(lport));
+		if (IS_ERR(fp))
+			goto err;
+		goto out;
+	}
+
+	if (IS_ERR(fp)) {
+		fc_lport_error(lport, fp);
+		goto err;
+	}
+
+	fh = fc_frame_header_get(fp);
+	ct = fc_frame_payload_get(fp, sizeof(*ct));
+	if (fh && ct && fh->fh_type == FC_TYPE_CT &&
+	    ct->ct_fs_type == FC_FST_DIR &&
+	    ct->ct_fs_subtype == FC_NS_SUBTYPE &&
+	    ntohs(ct->ct_cmd) == FC_FS_ACC)
+		fc_lport_enter_rsnn_nn(lport);
+	else
+		fc_lport_error(lport, fp);
+
+out:
+	fc_frame_free(fp);
+err:
+	mutex_unlock(&lport->lp_mutex);
+}
+
+/**
  * fc_lport_rnn_id_resp() - Handle response to Register Node
  *			    Name by ID (RNN_ID) request
  * @sp: current sequence in RNN_ID exchange
@@ -1204,6 +1261,37 @@ static void fc_lport_enter_rft_id(struct fc_lport *lport)
 }
 
 /**
+ * fc_rport_enter_rsnn_nn() - Register symbolic node name with the name server
+ * @lport: Fibre Channel local port to register
+ *
+ * Locking Note: The lport lock is expected to be held before calling
+ * this routine.
+ */
+static void fc_lport_enter_rsnn_nn(struct fc_lport *lport)
+{
+	struct fc_frame *fp;
+	size_t len;
+
+	FC_LPORT_DBG(lport, "Entered RSNN_NN state from %s state\n",
+		     fc_lport_state(lport));
+
+	fc_lport_state_enter(lport, LPORT_ST_RSNN_NN);
+
+	len = strnlen(fc_host_symbolic_name(lport->host), 255);
+	fp = fc_frame_alloc(lport, sizeof(struct fc_ct_hdr) +
+			    sizeof(struct fc_ns_rsnn) + len);
+	if (!fp) {
+		fc_lport_error(lport, fp);
+		return;
+	}
+
+	if (!lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, FC_NS_RSNN_NN,
+				  fc_lport_rsnn_nn_resp,
+				  lport, lport->e_d_tov))
+		fc_lport_error(lport, fp);
+}
+
+/**
  * fc_rport_enter_rnn_id() - Register node name with the name server
  * @lport: Fibre Channel local port to register
  *
@@ -1293,6 +1381,9 @@ static void fc_lport_timeout(struct work_struct *work)
 	case LPORT_ST_RNN_ID:
 		fc_lport_enter_rnn_id(lport);
 		break;
+	case LPORT_ST_RSNN_NN:
+		fc_lport_enter_rsnn_nn(lport);
+		break;
 	case LPORT_ST_RFT_ID:
 		fc_lport_enter_rft_id(lport);
 		break;
diff --git a/include/scsi/fc/fc_ns.h b/include/scsi/fc/fc_ns.h
index 790d7b9..fa82830 100644
--- a/include/scsi/fc/fc_ns.h
+++ b/include/scsi/fc/fc_ns.h
@@ -47,6 +47,7 @@ enum fc_ns_req {
 	FC_NS_RFT_ID =	0x0217,		/* reg FC4 type for ID */
 	FC_NS_RPN_ID =	0x0212,		/* reg port name for ID */
 	FC_NS_RNN_ID =	0x0213,		/* reg node name for ID */
+	FC_NS_RSNN_NN =	0x0239,		/* reg symbolic node name */
 };
 
 /*
@@ -156,4 +157,13 @@ struct fc_ns_rn_id {
 	__be64		fr_wwn;		/* node name or port name */
 } __attribute__((__packed__));
 
+/*
+ * RSNN_NN request - register symbolic node name
+ */
+struct fc_ns_rsnn {
+	__be64		fr_wwn;		/* node name */
+	__u8		fr_name_len;
+	char		fr_name[];
+} __attribute__((__packed__));
+
 #endif /* _FC_NS_H_ */
diff --git a/include/scsi/fc_encode.h b/include/scsi/fc_encode.h
index ad13cb1..89981af 100644
--- a/include/scsi/fc_encode.h
+++ b/include/scsi/fc_encode.h
@@ -33,6 +33,7 @@ struct fc_ct_req {
 		struct fc_ns_rn_id  rn;
 		struct fc_ns_rft rft;
 		struct fc_ns_fid fid;
+		struct fc_ns_rsnn snn;
 	} payload;
 };
 
@@ -136,6 +137,15 @@ static inline int fc_ct_fill(struct fc_lport *lport,
 		put_unaligned_be64(lport->wwnn, &ct->payload.rn.fr_wwn);
 		break;
 
+	case FC_NS_RSNN_NN:
+		ct = fc_ct_hdr_fill(fp, op, sizeof(struct fc_ns_rsnn));
+		put_unaligned_be64(lport->wwnn, &ct->payload.snn.fr_wwn);
+		strncpy(ct->payload.snn.fr_name,
+			fc_host_symbolic_name(lport->host), 255);
+		ct->payload.snn.fr_name_len =
+			strnlen(ct->payload.snn.fr_name, 255);
+		break;
+
 	default:
 		return -EINVAL;
 	}
diff --git a/include/scsi/libfc.h b/include/scsi/libfc.h
index ad90857..40ab252 100644
--- a/include/scsi/libfc.h
+++ b/include/scsi/libfc.h
@@ -62,6 +62,7 @@ enum fc_lport_state {
 	LPORT_ST_FLOGI,
 	LPORT_ST_DNS,
 	LPORT_ST_RNN_ID,
+	LPORT_ST_RSNN_NN,
 	LPORT_ST_RFT_ID,
 	LPORT_ST_SCR,
 	LPORT_ST_READY,

[PATCH 20/35] libfc: Register Symbolic Port Name (RSPN_ID)

[Robert Love]

From: Chris Leech <christopher.leech@intel.com>

Register the fc_host symbolic name as the symbolic port name
with the fabric name server.

Signed-off-by: Chris Leech <christopher.leech@intel.com>
Signed-off-by: Robert Love <robert.w.love@intel.com>
---

 drivers/scsi/libfc/fc_lport.c |   90 +++++++++++++++++++++++++++++++++++++++++
 include/scsi/fc/fc_ns.h       |   10 +++++
 include/scsi/fc_encode.h      |   11 +++++
 include/scsi/libfc.h          |    1 
 4 files changed, 112 insertions(+), 0 deletions(-)

diff --git a/drivers/scsi/libfc/fc_lport.c b/drivers/scsi/libfc/fc_lport.c
index ae5e2c3..76197d7 100644
--- a/drivers/scsi/libfc/fc_lport.c
+++ b/drivers/scsi/libfc/fc_lport.c
@@ -110,6 +110,7 @@ static void fc_lport_enter_flogi(struct fc_lport *);
 static void fc_lport_enter_dns(struct fc_lport *);
 static void fc_lport_enter_rnn_id(struct fc_lport *);
 static void fc_lport_enter_rsnn_nn(struct fc_lport *);
+static void fc_lport_enter_rspn_id(struct fc_lport *);
 static void fc_lport_enter_rft_id(struct fc_lport *);
 static void fc_lport_enter_scr(struct fc_lport *);
 static void fc_lport_enter_ready(struct fc_lport *);
@@ -121,6 +122,7 @@ static const char *fc_lport_state_names[] = {
 	[LPORT_ST_DNS] =      "dNS",
 	[LPORT_ST_RNN_ID] =   "RNN_ID",
 	[LPORT_ST_RSNN_NN] =  "RSNN_NN",
+	[LPORT_ST_RSPN_ID] =  "RSPN_ID",
 	[LPORT_ST_RFT_ID] =   "RFT_ID",
 	[LPORT_ST_SCR] =      "SCR",
 	[LPORT_ST_READY] =    "Ready",
@@ -969,6 +971,7 @@ static void fc_lport_error(struct fc_lport *lport, struct fc_frame *fp)
 			case LPORT_ST_RESET:
 			case LPORT_ST_RNN_ID:
 			case LPORT_ST_RSNN_NN:
+			case LPORT_ST_RSPN_ID:
 			case LPORT_ST_RFT_ID:
 			case LPORT_ST_SCR:
 			case LPORT_ST_DNS:
@@ -1036,6 +1039,59 @@ err:
 }
 
 /**
+ * fc_lport_rspn_id_resp() - Handle response to Register Symbolic Port Name
+ *			     by ID (RSPN_ID) request
+ * @sp: current sequence in RSPN_ID exchange
+ * @fp: response frame
+ * @lp_arg: Fibre Channel host port instance
+ *
+ * Locking Note: This function will be called without the lport lock
+ * held, but it will lock, call an _enter_* function or fc_lport_error
+ * and then unlock the lport.
+ */
+static void fc_lport_rspn_id_resp(struct fc_seq *sp, struct fc_frame *fp,
+				  void *lp_arg)
+{
+	struct fc_lport *lport = lp_arg;
+	struct fc_frame_header *fh;
+	struct fc_ct_hdr *ct;
+
+	FC_LPORT_DBG(lport, "Received a RSPN_ID %s\n", fc_els_resp_type(fp));
+
+	if (fp == ERR_PTR(-FC_EX_CLOSED))
+		return;
+
+	mutex_lock(&lport->lp_mutex);
+
+	if (lport->state != LPORT_ST_RSPN_ID) {
+		FC_LPORT_DBG(lport, "Received a RSPN_ID response, but in state "
+			     "%s\n", fc_lport_state(lport));
+		if (IS_ERR(fp))
+			goto err;
+		goto out;
+	}
+
+	if (IS_ERR(fp)) {
+		fc_lport_error(lport, fp);
+		goto err;
+	}
+
+	fh = fc_frame_header_get(fp);
+	ct = fc_frame_payload_get(fp, sizeof(*ct));
+	if (fh && ct && fh->fh_type == FC_TYPE_CT &&
+	    ct->ct_fs_type == FC_FST_DIR &&
+	    ct->ct_fs_subtype == FC_NS_SUBTYPE &&
+	    ntohs(ct->ct_cmd) == FC_FS_ACC)
+		fc_lport_enter_rspn_id(lport);
+	else
+		fc_lport_error(lport, fp);
+
+out:
+	fc_frame_free(fp);
+err:
+	mutex_unlock(&lport->lp_mutex);
+}
+/**
  * fc_lport_rsnn_nn_resp() - Handle response to Register Symbolic Node Name
  *			     by Node Name (RSNN_NN) request
  * @sp: current sequence in RSNN_NN exchange
@@ -1261,6 +1317,37 @@ static void fc_lport_enter_rft_id(struct fc_lport *lport)
 }
 
 /**
+ * fc_rport_enter_rspn_id() - Register symbolic port name with the name server
+ * @lport: Fibre Channel local port to register
+ *
+ * Locking Note: The lport lock is expected to be held before calling
+ * this routine.
+ */
+static void fc_lport_enter_rspn_id(struct fc_lport *lport)
+{
+	struct fc_frame *fp;
+	size_t len;
+
+	FC_LPORT_DBG(lport, "Entered RSPN_ID state from %s state\n",
+		     fc_lport_state(lport));
+
+	fc_lport_state_enter(lport, LPORT_ST_RSPN_ID);
+
+	len = strnlen(fc_host_symbolic_name(lport->host), 255);
+	fp = fc_frame_alloc(lport, sizeof(struct fc_ct_hdr) +
+			    sizeof(struct fc_ns_rspn) + len);
+	if (!fp) {
+		fc_lport_error(lport, fp);
+		return;
+	}
+
+	if (!lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, FC_NS_RSPN_ID,
+				  fc_lport_rspn_id_resp,
+				  lport, lport->e_d_tov))
+		fc_lport_error(lport, fp);
+}
+
+/**
  * fc_rport_enter_rsnn_nn() - Register symbolic node name with the name server
  * @lport: Fibre Channel local port to register
  *
@@ -1384,6 +1471,9 @@ static void fc_lport_timeout(struct work_struct *work)
 	case LPORT_ST_RSNN_NN:
 		fc_lport_enter_rsnn_nn(lport);
 		break;
+	case LPORT_ST_RSPN_ID:
+		fc_lport_enter_rspn_id(lport);
+		break;
 	case LPORT_ST_RFT_ID:
 		fc_lport_enter_rft_id(lport);
 		break;
diff --git a/include/scsi/fc/fc_ns.h b/include/scsi/fc/fc_ns.h
index fa82830..3fd59a2 100644
--- a/include/scsi/fc/fc_ns.h
+++ b/include/scsi/fc/fc_ns.h
@@ -47,6 +47,7 @@ enum fc_ns_req {
 	FC_NS_RFT_ID =	0x0217,		/* reg FC4 type for ID */
 	FC_NS_RPN_ID =	0x0212,		/* reg port name for ID */
 	FC_NS_RNN_ID =	0x0213,		/* reg node name for ID */
+	FC_NS_RSPN_ID =	0x0218,		/* reg symbolic port name */
 	FC_NS_RSNN_NN =	0x0239,		/* reg symbolic node name */
 };
 
@@ -166,4 +167,13 @@ struct fc_ns_rsnn {
 	char		fr_name[];
 } __attribute__((__packed__));
 
+/*
+ * RSPN_ID request - register symbolic port name
+ */
+struct fc_ns_rspn {
+	struct fc_ns_fid fr_fid;	/* port ID object */
+	__u8		fr_name_len;
+	char		fr_name[];
+} __attribute__((__packed__));
+
 #endif /* _FC_NS_H_ */
diff --git a/include/scsi/fc_encode.h b/include/scsi/fc_encode.h
index 89981af..9afcbb9 100644
--- a/include/scsi/fc_encode.h
+++ b/include/scsi/fc_encode.h
@@ -34,6 +34,7 @@ struct fc_ct_req {
 		struct fc_ns_rft rft;
 		struct fc_ns_fid fid;
 		struct fc_ns_rsnn snn;
+		struct fc_ns_rspn spn;
 	} payload;
 };
 
@@ -137,6 +138,16 @@ static inline int fc_ct_fill(struct fc_lport *lport,
 		put_unaligned_be64(lport->wwnn, &ct->payload.rn.fr_wwn);
 		break;
 
+	case FC_NS_RSPN_ID:
+		ct = fc_ct_hdr_fill(fp, op, sizeof(struct fc_ns_rspn));
+		hton24(ct->payload.spn.fr_fid.fp_fid,
+		       fc_host_port_id(lport->host));
+		strncpy(ct->payload.spn.fr_name,
+			fc_host_symbolic_name(lport->host), 255);
+		ct->payload.spn.fr_name_len =
+			strnlen(ct->payload.spn.fr_name, 255);
+		break;
+
 	case FC_NS_RSNN_NN:
 		ct = fc_ct_hdr_fill(fp, op, sizeof(struct fc_ns_rsnn));
 		put_unaligned_be64(lport->wwnn, &ct->payload.snn.fr_wwn);
diff --git a/include/scsi/libfc.h b/include/scsi/libfc.h
index 40ab252..a5579c3 100644
--- a/include/scsi/libfc.h
+++ b/include/scsi/libfc.h
@@ -63,6 +63,7 @@ enum fc_lport_state {
 	LPORT_ST_DNS,
 	LPORT_ST_RNN_ID,
 	LPORT_ST_RSNN_NN,
+	LPORT_ST_RSPN_ID,
 	LPORT_ST_RFT_ID,
 	LPORT_ST_SCR,
 	LPORT_ST_READY,

[PATCH 21/35] libfc: combine name server registration response handlers

[Robert Love]

From: Chris Leech <christopher.leech@intel.com>

They all do the same thing, so combine them into a single function.

Signed-off-by: Chris Leech <christopher.leech@intel.com>
Signed-off-by: Robert Love <robert.w.love@intel.com>
---

 drivers/scsi/libfc/fc_lport.c |  205 ++++++-----------------------------------
 1 files changed, 30 insertions(+), 175 deletions(-)

diff --git a/drivers/scsi/libfc/fc_lport.c b/drivers/scsi/libfc/fc_lport.c
index 76197d7..5e7b560 100644
--- a/drivers/scsi/libfc/fc_lport.c
+++ b/drivers/scsi/libfc/fc_lport.c
@@ -985,9 +985,9 @@ static void fc_lport_error(struct fc_lport *lport, struct fc_frame *fp)
 }
 
 /**
- * fc_lport_rft_id_resp() - Handle response to Register Fibre
- *			    Channel Types by ID (RFT_ID) request
- * @sp: current sequence in RFT_ID exchange
+ * fc_lport_ns_resp() - Handle response to a name server
+ * 			registration exchange
+ * @sp: current sequence in exchange
  * @fp: response frame
  * @lp_arg: Fibre Channel host port instance
  *
@@ -995,130 +995,23 @@ static void fc_lport_error(struct fc_lport *lport, struct fc_frame *fp)
  * held, but it will lock, call an _enter_* function or fc_lport_error
  * and then unlock the lport.
  */
-static void fc_lport_rft_id_resp(struct fc_seq *sp, struct fc_frame *fp,
-				 void *lp_arg)
+static void fc_lport_ns_resp(struct fc_seq *sp, struct fc_frame *fp,
+			     void *lp_arg)
 {
 	struct fc_lport *lport = lp_arg;
 	struct fc_frame_header *fh;
 	struct fc_ct_hdr *ct;
 
-	FC_LPORT_DBG(lport, "Received a RFT_ID %s\n", fc_els_resp_type(fp));
+	FC_LPORT_DBG(lport, "Received a ns %s\n", fc_els_resp_type(fp));
 
 	if (fp == ERR_PTR(-FC_EX_CLOSED))
 		return;
 
 	mutex_lock(&lport->lp_mutex);
 
-	if (lport->state != LPORT_ST_RFT_ID) {
-		FC_LPORT_DBG(lport, "Received a RFT_ID response, but in state "
-			     "%s\n", fc_lport_state(lport));
-		if (IS_ERR(fp))
-			goto err;
-		goto out;
-	}
-
-	if (IS_ERR(fp)) {
-		fc_lport_error(lport, fp);
-		goto err;
-	}
-
-	fh = fc_frame_header_get(fp);
-	ct = fc_frame_payload_get(fp, sizeof(*ct));
-
-	if (fh && ct && fh->fh_type == FC_TYPE_CT &&
-	    ct->ct_fs_type == FC_FST_DIR &&
-	    ct->ct_fs_subtype == FC_NS_SUBTYPE &&
-	    ntohs(ct->ct_cmd) == FC_FS_ACC)
-		fc_lport_enter_scr(lport);
-	else
-		fc_lport_error(lport, fp);
-out:
-	fc_frame_free(fp);
-err:
-	mutex_unlock(&lport->lp_mutex);
-}
-
-/**
- * fc_lport_rspn_id_resp() - Handle response to Register Symbolic Port Name
- *			     by ID (RSPN_ID) request
- * @sp: current sequence in RSPN_ID exchange
- * @fp: response frame
- * @lp_arg: Fibre Channel host port instance
- *
- * Locking Note: This function will be called without the lport lock
- * held, but it will lock, call an _enter_* function or fc_lport_error
- * and then unlock the lport.
- */
-static void fc_lport_rspn_id_resp(struct fc_seq *sp, struct fc_frame *fp,
-				  void *lp_arg)
-{
-	struct fc_lport *lport = lp_arg;
-	struct fc_frame_header *fh;
-	struct fc_ct_hdr *ct;
-
-	FC_LPORT_DBG(lport, "Received a RSPN_ID %s\n", fc_els_resp_type(fp));
-
-	if (fp == ERR_PTR(-FC_EX_CLOSED))
-		return;
-
-	mutex_lock(&lport->lp_mutex);
-
-	if (lport->state != LPORT_ST_RSPN_ID) {
-		FC_LPORT_DBG(lport, "Received a RSPN_ID response, but in state "
-			     "%s\n", fc_lport_state(lport));
-		if (IS_ERR(fp))
-			goto err;
-		goto out;
-	}
-
-	if (IS_ERR(fp)) {
-		fc_lport_error(lport, fp);
-		goto err;
-	}
-
-	fh = fc_frame_header_get(fp);
-	ct = fc_frame_payload_get(fp, sizeof(*ct));
-	if (fh && ct && fh->fh_type == FC_TYPE_CT &&
-	    ct->ct_fs_type == FC_FST_DIR &&
-	    ct->ct_fs_subtype == FC_NS_SUBTYPE &&
-	    ntohs(ct->ct_cmd) == FC_FS_ACC)
-		fc_lport_enter_rspn_id(lport);
-	else
-		fc_lport_error(lport, fp);
-
-out:
-	fc_frame_free(fp);
-err:
-	mutex_unlock(&lport->lp_mutex);
-}
-/**
- * fc_lport_rsnn_nn_resp() - Handle response to Register Symbolic Node Name
- *			     by Node Name (RSNN_NN) request
- * @sp: current sequence in RSNN_NN exchange
- * @fp: response frame
- * @lp_arg: Fibre Channel host port instance
- *
- * Locking Note: This function will be called without the lport lock
- * held, but it will lock, call an _enter_* function or fc_lport_error
- * and then unlock the lport.
- */
-static void fc_lport_rsnn_nn_resp(struct fc_seq *sp, struct fc_frame *fp,
-				  void *lp_arg)
-{
-	struct fc_lport *lport = lp_arg;
-	struct fc_frame_header *fh;
-	struct fc_ct_hdr *ct;
-
-	FC_LPORT_DBG(lport, "Received a RSNN_NN %s\n", fc_els_resp_type(fp));
-
-	if (fp == ERR_PTR(-FC_EX_CLOSED))
-		return;
-
-	mutex_lock(&lport->lp_mutex);
-
-	if (lport->state != LPORT_ST_RSNN_NN) {
-		FC_LPORT_DBG(lport, "Received a RSNN_NN response, but in state "
-			     "%s\n", fc_lport_state(lport));
+	if (lport->state < LPORT_ST_RNN_ID || lport->state > LPORT_ST_RFT_ID) {
+		FC_LPORT_DBG(lport, "Received a name server response, "
+				    "but in state %s\n", fc_lport_state(lport));
 		if (IS_ERR(fp))
 			goto err;
 		goto out;
@@ -1131,68 +1024,30 @@ static void fc_lport_rsnn_nn_resp(struct fc_seq *sp, struct fc_frame *fp,
 
 	fh = fc_frame_header_get(fp);
 	ct = fc_frame_payload_get(fp, sizeof(*ct));
-	if (fh && ct && fh->fh_type == FC_TYPE_CT &&
-	    ct->ct_fs_type == FC_FST_DIR &&
-	    ct->ct_fs_subtype == FC_NS_SUBTYPE &&
-	    ntohs(ct->ct_cmd) == FC_FS_ACC)
-		fc_lport_enter_rsnn_nn(lport);
-	else
-		fc_lport_error(lport, fp);
-
-out:
-	fc_frame_free(fp);
-err:
-	mutex_unlock(&lport->lp_mutex);
-}
 
-/**
- * fc_lport_rnn_id_resp() - Handle response to Register Node
- *			    Name by ID (RNN_ID) request
- * @sp: current sequence in RNN_ID exchange
- * @fp: response frame
- * @lp_arg: Fibre Channel host port instance
- *
- * Locking Note: This function will be called without the lport lock
- * held, but it will lock, call an _enter_* function or fc_lport_error
- * and then unlock the lport.
- */
-static void fc_lport_rnn_id_resp(struct fc_seq *sp, struct fc_frame *fp,
-				 void *lp_arg)
-{
-	struct fc_lport *lport = lp_arg;
-	struct fc_frame_header *fh;
-	struct fc_ct_hdr *ct;
-
-	FC_LPORT_DBG(lport, "Received a RNN_ID %s\n", fc_els_resp_type(fp));
-
-	if (fp == ERR_PTR(-FC_EX_CLOSED))
-		return;
-
-	mutex_lock(&lport->lp_mutex);
-
-	if (lport->state != LPORT_ST_RNN_ID) {
-		FC_LPORT_DBG(lport, "Received a RNN_ID response, but in state "
-			     "%s\n", fc_lport_state(lport));
-		if (IS_ERR(fp))
-			goto err;
-		goto out;
-	}
-
-	if (IS_ERR(fp)) {
-		fc_lport_error(lport, fp);
-		goto err;
-	}
-
-	fh = fc_frame_header_get(fp);
-	ct = fc_frame_payload_get(fp, sizeof(*ct));
 	if (fh && ct && fh->fh_type == FC_TYPE_CT &&
 	    ct->ct_fs_type == FC_FST_DIR &&
 	    ct->ct_fs_subtype == FC_NS_SUBTYPE &&
 	    ntohs(ct->ct_cmd) == FC_FS_ACC)
-		fc_lport_enter_rft_id(lport);
+		switch (lport->state) {
+		case LPORT_ST_RNN_ID:
+			fc_lport_enter_rsnn_nn(lport);
+			break;
+		case LPORT_ST_RSNN_NN:
+			fc_lport_enter_rspn_id(lport);
+			break;
+		case LPORT_ST_RSPN_ID:
+			fc_lport_enter_rft_id(lport);
+			break;
+		case LPORT_ST_RFT_ID:
+			fc_lport_enter_scr(lport);
+			break;
+		default:
+			/* should have already been caught by state checks */
+			break;
+		}
 	else
 		fc_lport_error(lport, fp);
-
 out:
 	fc_frame_free(fp);
 err:
@@ -1311,7 +1166,7 @@ static void fc_lport_enter_rft_id(struct fc_lport *lport)
 	}
 
 	if (!lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, FC_NS_RFT_ID,
-				  fc_lport_rft_id_resp,
+				  fc_lport_ns_resp,
 				  lport, lport->e_d_tov))
 		fc_lport_error(lport, fp);
 }
@@ -1342,7 +1197,7 @@ static void fc_lport_enter_rspn_id(struct fc_lport *lport)
 	}
 
 	if (!lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, FC_NS_RSPN_ID,
-				  fc_lport_rspn_id_resp,
+				  fc_lport_ns_resp,
 				  lport, lport->e_d_tov))
 		fc_lport_error(lport, fp);
 }
@@ -1373,7 +1228,7 @@ static void fc_lport_enter_rsnn_nn(struct fc_lport *lport)
 	}
 
 	if (!lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, FC_NS_RSNN_NN,
-				  fc_lport_rsnn_nn_resp,
+				  fc_lport_ns_resp,
 				  lport, lport->e_d_tov))
 		fc_lport_error(lport, fp);
 }
@@ -1402,7 +1257,7 @@ static void fc_lport_enter_rnn_id(struct fc_lport *lport)
 	}
 
 	if (!lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, FC_NS_RNN_ID,
-				  fc_lport_rnn_id_resp,
+				  fc_lport_ns_resp,
 				  lport, lport->e_d_tov))
 		fc_lport_error(lport, fp);
 }

[PATCH 22/35] libfc: combine name server registration request functions

[Robert Love]

From: Chris Leech <christopher.leech@intel.com>

Signed-off-by: Chris Leech <christopher.leech@intel.com>
Signed-off-by: Robert Love <robert.w.love@intel.com>
---

 drivers/scsi/libfc/fc_lport.c |  164 +++++++++++------------------------------
 1 files changed, 42 insertions(+), 122 deletions(-)

diff --git a/drivers/scsi/libfc/fc_lport.c b/drivers/scsi/libfc/fc_lport.c
index 5e7b560..f6fc9f4 100644
--- a/drivers/scsi/libfc/fc_lport.c
+++ b/drivers/scsi/libfc/fc_lport.c
@@ -108,10 +108,7 @@ static void fc_lport_error(struct fc_lport *, struct fc_frame *);
 static void fc_lport_enter_reset(struct fc_lport *);
 static void fc_lport_enter_flogi(struct fc_lport *);
 static void fc_lport_enter_dns(struct fc_lport *);
-static void fc_lport_enter_rnn_id(struct fc_lport *);
-static void fc_lport_enter_rsnn_nn(struct fc_lport *);
-static void fc_lport_enter_rspn_id(struct fc_lport *);
-static void fc_lport_enter_rft_id(struct fc_lport *);
+static void fc_lport_enter_ns(struct fc_lport *, enum fc_lport_state);
 static void fc_lport_enter_scr(struct fc_lport *);
 static void fc_lport_enter_ready(struct fc_lport *);
 static void fc_lport_enter_logo(struct fc_lport *);
@@ -157,7 +154,7 @@ static void fc_lport_rport_callback(struct fc_lport *lport,
 	case RPORT_EV_READY:
 		if (lport->state == LPORT_ST_DNS) {
 			lport->dns_rp = rdata;
-			fc_lport_enter_rnn_id(lport);
+			fc_lport_enter_ns(lport, LPORT_ST_RNN_ID);
 		} else {
 			FC_LPORT_DBG(lport, "Received an READY event "
 				     "on port (%6x) for the directory "
@@ -1031,13 +1028,13 @@ static void fc_lport_ns_resp(struct fc_seq *sp, struct fc_frame *fp,
 	    ntohs(ct->ct_cmd) == FC_FS_ACC)
 		switch (lport->state) {
 		case LPORT_ST_RNN_ID:
-			fc_lport_enter_rsnn_nn(lport);
+			fc_lport_enter_ns(lport, LPORT_ST_RSNN_NN);
 			break;
 		case LPORT_ST_RSNN_NN:
-			fc_lport_enter_rspn_id(lport);
+			fc_lport_enter_ns(lport, LPORT_ST_RSPN_ID);
 			break;
 		case LPORT_ST_RSPN_ID:
-			fc_lport_enter_rft_id(lport);
+			fc_lport_enter_ns(lport, LPORT_ST_RFT_ID);
 			break;
 		case LPORT_ST_RFT_ID:
 			fc_lport_enter_scr(lport);
@@ -1130,133 +1127,62 @@ static void fc_lport_enter_scr(struct fc_lport *lport)
 }
 
 /**
- * fc_lport_enter_rft_id() - Register FC4-types with the name server
+ * fc_lport_enter_ns() - register some object with the name server
  * @lport: Fibre Channel local port to register
  *
  * Locking Note: The lport lock is expected to be held before calling
  * this routine.
  */
-static void fc_lport_enter_rft_id(struct fc_lport *lport)
-{
-	struct fc_frame *fp;
-	struct fc_ns_fts *lps;
-	int i;
-
-	FC_LPORT_DBG(lport, "Entered RFT_ID state from %s state\n",
-		     fc_lport_state(lport));
-
-	fc_lport_state_enter(lport, LPORT_ST_RFT_ID);
-
-	lps = &lport->fcts;
-	i = sizeof(lps->ff_type_map) / sizeof(lps->ff_type_map[0]);
-	while (--i >= 0)
-		if (ntohl(lps->ff_type_map[i]) != 0)
-			break;
-	if (i < 0) {
-		/* nothing to register, move on to SCR */
-		fc_lport_enter_scr(lport);
-		return;
-	}
-
-	fp = fc_frame_alloc(lport, sizeof(struct fc_ct_hdr) +
-			    sizeof(struct fc_ns_rft));
-	if (!fp) {
-		fc_lport_error(lport, fp);
-		return;
-	}
-
-	if (!lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, FC_NS_RFT_ID,
-				  fc_lport_ns_resp,
-				  lport, lport->e_d_tov))
-		fc_lport_error(lport, fp);
-}
-
-/**
- * fc_rport_enter_rspn_id() - Register symbolic port name with the name server
- * @lport: Fibre Channel local port to register
- *
- * Locking Note: The lport lock is expected to be held before calling
- * this routine.
- */
-static void fc_lport_enter_rspn_id(struct fc_lport *lport)
-{
-	struct fc_frame *fp;
-	size_t len;
-
-	FC_LPORT_DBG(lport, "Entered RSPN_ID state from %s state\n",
-		     fc_lport_state(lport));
-
-	fc_lport_state_enter(lport, LPORT_ST_RSPN_ID);
-
-	len = strnlen(fc_host_symbolic_name(lport->host), 255);
-	fp = fc_frame_alloc(lport, sizeof(struct fc_ct_hdr) +
-			    sizeof(struct fc_ns_rspn) + len);
-	if (!fp) {
-		fc_lport_error(lport, fp);
-		return;
-	}
-
-	if (!lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, FC_NS_RSPN_ID,
-				  fc_lport_ns_resp,
-				  lport, lport->e_d_tov))
-		fc_lport_error(lport, fp);
-}
-
-/**
- * fc_rport_enter_rsnn_nn() - Register symbolic node name with the name server
- * @lport: Fibre Channel local port to register
- *
- * Locking Note: The lport lock is expected to be held before calling
- * this routine.
- */
-static void fc_lport_enter_rsnn_nn(struct fc_lport *lport)
+static void fc_lport_enter_ns(struct fc_lport *lport, enum fc_lport_state state)
 {
 	struct fc_frame *fp;
+	enum fc_ns_req cmd;
+	int size = sizeof(struct fc_ct_hdr);
 	size_t len;
 
-	FC_LPORT_DBG(lport, "Entered RSNN_NN state from %s state\n",
+	FC_LPORT_DBG(lport, "Entered %s state from %s state\n",
+		     fc_lport_state_names[state],
 		     fc_lport_state(lport));
 
-	fc_lport_state_enter(lport, LPORT_ST_RSNN_NN);
+	fc_lport_state_enter(lport, state);
 
-	len = strnlen(fc_host_symbolic_name(lport->host), 255);
-	fp = fc_frame_alloc(lport, sizeof(struct fc_ct_hdr) +
-			    sizeof(struct fc_ns_rsnn) + len);
-	if (!fp) {
-		fc_lport_error(lport, fp);
+	switch (state) {
+	case LPORT_ST_RNN_ID:
+		cmd = FC_NS_RNN_ID;
+		size += sizeof(struct fc_ns_rn_id);
+		break;
+	case LPORT_ST_RSNN_NN:
+		len = strnlen(fc_host_symbolic_name(lport->host), 255);
+		/* if there is no symbolic name, skip to RFT_ID */
+		if (!len)
+			return fc_lport_enter_ns(lport, LPORT_ST_RFT_ID);
+		cmd = FC_NS_RSNN_NN;
+		size += sizeof(struct fc_ns_rsnn) + len;
+		break;
+	case LPORT_ST_RSPN_ID:
+		len = strnlen(fc_host_symbolic_name(lport->host), 255);
+		/* if there is no symbolic name, skip to RFT_ID */
+		if (!len)
+			return fc_lport_enter_ns(lport, LPORT_ST_RFT_ID);
+		cmd = FC_NS_RSPN_ID;
+		size += sizeof(struct fc_ns_rspn) + len;
+		break;
+	case LPORT_ST_RFT_ID:
+		cmd = FC_NS_RFT_ID;
+		size += sizeof(struct fc_ns_rft);
+		break;
+	default:
+		fc_lport_error(lport, NULL);
 		return;
 	}
 
-	if (!lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, FC_NS_RSNN_NN,
-				  fc_lport_ns_resp,
-				  lport, lport->e_d_tov))
-		fc_lport_error(lport, fp);
-}
-
-/**
- * fc_rport_enter_rnn_id() - Register node name with the name server
- * @lport: Fibre Channel local port to register
- *
- * Locking Note: The lport lock is expected to be held before calling
- * this routine.
- */
-static void fc_lport_enter_rnn_id(struct fc_lport *lport)
-{
-	struct fc_frame *fp;
-
-	FC_LPORT_DBG(lport, "Entered RNN_ID state from %s state\n",
-		     fc_lport_state(lport));
-
-	fc_lport_state_enter(lport, LPORT_ST_RNN_ID);
-
-	fp = fc_frame_alloc(lport, sizeof(struct fc_ct_hdr) +
-			    sizeof(struct fc_ns_rn_id));
+	fp = fc_frame_alloc(lport, size);
 	if (!fp) {
 		fc_lport_error(lport, fp);
 		return;
 	}
 
-	if (!lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, FC_NS_RNN_ID,
+	if (!lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, cmd,
 				  fc_lport_ns_resp,
 				  lport, lport->e_d_tov))
 		fc_lport_error(lport, fp);
@@ -1321,16 +1247,10 @@ static void fc_lport_timeout(struct work_struct *work)
 		fc_lport_enter_dns(lport);
 		break;
 	case LPORT_ST_RNN_ID:
-		fc_lport_enter_rnn_id(lport);
-		break;
 	case LPORT_ST_RSNN_NN:
-		fc_lport_enter_rsnn_nn(lport);
-		break;
 	case LPORT_ST_RSPN_ID:
-		fc_lport_enter_rspn_id(lport);
-		break;
 	case LPORT_ST_RFT_ID:
-		fc_lport_enter_rft_id(lport);
+		fc_lport_enter_ns(lport, lport->state);
 		break;
 	case LPORT_ST_SCR:
 		fc_lport_enter_scr(lport);

[PATCH 23/35] fcoe: vport symbolic name support

[Robert Love]

From: Chris Leech <christopher.leech@intel.com>

Allow a vport specific string to be appended to the port symbolic
name.  The new symbolic name is sent to the name server after it
is set.

This currently messes with libhbalinux, which is looking for
the fcoe "fcoe <ver> over <ethX>" string and expects whatever
comes after the "over" to be a network interface name only.

Adds an EXPORT_SYMBOL to libfc for fc_frame_alloc_fill, which is
needed to allow fcoe to allocate a frame of variable length for
the RSPN request.

Signed-off-by: Chris Leech <christopher.leech@intel.com>
Signed-off-by: Robert Love <robert.w.love@intel.com>
---

 drivers/scsi/fcoe/fcoe.c      |   33 +++++++++++++++++++++++++++++++++
 drivers/scsi/libfc/fc_frame.c |    1 +
 2 files changed, 34 insertions(+), 0 deletions(-)

diff --git a/drivers/scsi/fcoe/fcoe.c b/drivers/scsi/fcoe/fcoe.c
index 6bf396f..ba9de9d 100644
--- a/drivers/scsi/fcoe/fcoe.c
+++ b/drivers/scsi/fcoe/fcoe.c
@@ -96,6 +96,7 @@ static struct scsi_transport_template *fcoe_vport_transport_template;
 static int fcoe_vport_destroy(struct fc_vport *vport);
 static int fcoe_vport_create(struct fc_vport *vport, bool disabled);
 static int fcoe_vport_disable(struct fc_vport *vport, bool disable);
+static void fcoe_set_vport_symbolic_name(struct fc_vport *vport);
 
 struct fc_function_template fcoe_transport_function = {
 	.show_host_node_name = 1,
@@ -132,6 +133,7 @@ struct fc_function_template fcoe_transport_function = {
 	.vport_create = fcoe_vport_create,
 	.vport_delete = fcoe_vport_destroy,
 	.vport_disable = fcoe_vport_disable,
+	.set_vport_symbolic_name = fcoe_set_vport_symbolic_name,
 };
 
 struct fc_function_template fcoe_vport_transport_function = {
@@ -2303,3 +2305,34 @@ static int fcoe_vport_disable(struct fc_vport *vport, bool disable)
 	return 0;
 }
 
+/**
+ * fcoe_vport_set_symbolic_name() - append vport string to symbolic name
+ * @vport: fc_vport with a new symbolic name string
+ *
+ * After generating a new symbolic name string, a new RSPN_ID request is
+ * sent to the name server.  There is no response handler, so if it fails
+ * for some reason it will not be retried.
+ */
+static void fcoe_set_vport_symbolic_name(struct fc_vport *vport)
+{
+	struct fc_lport *lport = vport->dd_data;
+	struct fc_frame *fp;
+	size_t len;
+
+	snprintf(fc_host_symbolic_name(lport->host), FC_SYMBOLIC_NAME_SIZE,
+		 "%s v%s over %s : %s", FCOE_NAME, FCOE_VERSION,
+		 fcoe_netdev(lport)->name, vport->symbolic_name);
+
+	if (lport->state != LPORT_ST_READY)
+		return;
+
+	len = strnlen(fc_host_symbolic_name(lport->host), 255);
+	fp = fc_frame_alloc(lport,
+			    sizeof(struct fc_ct_hdr) +
+			    sizeof(struct fc_ns_rspn) + len);
+	if (!fp)
+		return;
+	lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, FC_NS_RSPN_ID,
+			     NULL, NULL, lport->e_d_tov);
+}
+
diff --git a/drivers/scsi/libfc/fc_frame.c b/drivers/scsi/libfc/fc_frame.c
index 5b9c977..c5f4484 100644
--- a/drivers/scsi/libfc/fc_frame.c
+++ b/drivers/scsi/libfc/fc_frame.c
@@ -88,3 +88,4 @@ struct fc_frame *fc_frame_alloc_fill(struct fc_lport *lp, size_t payload_len)
 	}
 	return fp;
 }
+EXPORT_SYMBOL(fc_frame_alloc_fill);

[PATCH 24/35] libfc: Export FC headers

[Robert Love]

Export fc_els.h, fc_fs.h, fc_gs.h and fc_ns.h so that they
may be used by applications.

This will be needed for FC Passthrough applications like fcping,
but could be used by other applications.

Fix to include <linux/types.h> to exported files provided by
Chris Leech <christopher.leech@intel.com>.

Signed-off-by: Robert Love <robert.w.love@intel.com>
---

 include/scsi/Kbuild      |    1 +
 include/scsi/fc/Kbuild   |    4 ++++
 include/scsi/fc/fc_els.h |    2 ++
 include/scsi/fc/fc_fs.h  |    2 ++
 include/scsi/fc/fc_gs.h  |    2 ++
 include/scsi/fc/fc_ns.h  |    2 ++
 6 files changed, 13 insertions(+), 0 deletions(-)
 create mode 100644 include/scsi/fc/Kbuild

diff --git a/include/scsi/Kbuild b/include/scsi/Kbuild
index 33b2750..b3a0ee6 100644
--- a/include/scsi/Kbuild
+++ b/include/scsi/Kbuild
@@ -2,3 +2,4 @@ header-y += scsi.h
 header-y += scsi_netlink.h
 header-y += scsi_netlink_fc.h
 header-y += scsi_bsg_fc.h
+header-y += fc/
diff --git a/include/scsi/fc/Kbuild b/include/scsi/fc/Kbuild
new file mode 100644
index 0000000..5660381
--- /dev/null
+++ b/include/scsi/fc/Kbuild
@@ -0,0 +1,4 @@
+header-y += fc_els.h
+header-y += fc_fs.h
+header-y += fc_gs.h
+header-y += fc_ns.h
diff --git a/include/scsi/fc/fc_els.h b/include/scsi/fc/fc_els.h
index b0872af..f943281 100644
--- a/include/scsi/fc/fc_els.h
+++ b/include/scsi/fc/fc_els.h
@@ -20,6 +20,8 @@
 #ifndef _FC_ELS_H_
 #define	_FC_ELS_H_
 
+#include <linux/types.h>
+
 /*
  * Fibre Channel Switch - Enhanced Link Services definitions.
  * From T11 FC-LS Rev 1.2 June 7, 2005.
diff --git a/include/scsi/fc/fc_fs.h b/include/scsi/fc/fc_fs.h
index ac4cd38..50f28b1 100644
--- a/include/scsi/fc/fc_fs.h
+++ b/include/scsi/fc/fc_fs.h
@@ -20,6 +20,8 @@
 #ifndef _FC_FS_H_
 #define _FC_FS_H_
 
+#include <linux/types.h>
+
 /*
  * Fibre Channel Framing and Signalling definitions.
  * From T11 FC-FS-2 Rev 0.90 - 9 August 2005.
diff --git a/include/scsi/fc/fc_gs.h b/include/scsi/fc/fc_gs.h
index 324dd0e..a37346d 100644
--- a/include/scsi/fc/fc_gs.h
+++ b/include/scsi/fc/fc_gs.h
@@ -20,6 +20,8 @@
 #ifndef _FC_GS_H_
 #define	_FC_GS_H_
 
+#include <linux/types.h>
+
 /*
  * Fibre Channel Services - Common Transport.
  * From T11.org FC-GS-2 Rev 5.3 November 1998.
diff --git a/include/scsi/fc/fc_ns.h b/include/scsi/fc/fc_ns.h
index 3fd59a2..f4d354e 100644
--- a/include/scsi/fc/fc_ns.h
+++ b/include/scsi/fc/fc_ns.h
@@ -20,6 +20,8 @@
 #ifndef _FC_NS_H_
 #define	_FC_NS_H_
 
+#include <linux/types.h>
+
 /*
  * Fibre Channel Services - Name Service (dNS)
  * From T11.org FC-GS-2 Rev 5.3 November 1998.

[PATCH 25/35] libfc: Add routine to copy data from a buffer to a SG list

[Robert Love]

When handling the multi-frame responses of fc pass-thru requests,
a code segment similar to fc_fcp_recv_data (routine to receive
inbound SCSI data) is used in the response handler. This patch
is to add a routine, called fc_copy_buffer_to_sglist(), to handle
the common function of copying data from a buffer to a scatter-
gather list in order to avoid code duplication.

Signed-off-by: Robert Love <robert.w.love@intel.com>
---

 drivers/scsi/libfc/fc_fcp.c   |   56 +++++++-------------------------------
 drivers/scsi/libfc/fc_libfc.c |   60 +++++++++++++++++++++++++++++++++++++++++
 drivers/scsi/libfc/fc_libfc.h |    8 +++++
 3 files changed, 78 insertions(+), 46 deletions(-)

diff --git a/drivers/scsi/libfc/fc_fcp.c b/drivers/scsi/libfc/fc_fcp.c
index e4ff27e..a474773 100644
--- a/drivers/scsi/libfc/fc_fcp.c
+++ b/drivers/scsi/libfc/fc_fcp.c
@@ -324,7 +324,7 @@ static void fc_fcp_recv_data(struct fc_fcp_pkt *fsp, struct fc_frame *fp)
 	size_t len;
 	void *buf;
 	struct scatterlist *sg;
-	size_t remaining;
+	u32 nents;
 
 	fh = fc_frame_header_get(fp);
 	offset = ntohl(fh->fh_parm_offset);
@@ -348,55 +348,19 @@ static void fc_fcp_recv_data(struct fc_fcp_pkt *fsp, struct fc_frame *fp)
 	if (offset != fsp->xfer_len)
 		fsp->state |= FC_SRB_DISCONTIG;
 
-	crc = 0;
-	if (fr_flags(fp) & FCPHF_CRC_UNCHECKED)
-		crc = crc32(~0, (u8 *) fh, sizeof(*fh));
-
 	sg = scsi_sglist(sc);
-	remaining = len;
-
-	while (remaining > 0 && sg) {
-		size_t off;
-		void *page_addr;
-		size_t sg_bytes;
-
-		if (offset >= sg->length) {
-			offset -= sg->length;
-			sg = sg_next(sg);
-			continue;
-		}
-		sg_bytes = min(remaining, sg->length - offset);
+	nents = scsi_sg_count(sc);
 
-		/*
-		 * The scatterlist item may be bigger than PAGE_SIZE,
-		 * but we are limited to mapping PAGE_SIZE at a time.
-		 */
-		off = offset + sg->offset;
-		sg_bytes = min(sg_bytes, (size_t)
-			       (PAGE_SIZE - (off & ~PAGE_MASK)));
-		page_addr = kmap_atomic(sg_page(sg) + (off >> PAGE_SHIFT),
-					KM_SOFTIRQ0);
-		if (!page_addr)
-			break;		/* XXX panic? */
-
-		if (fr_flags(fp) & FCPHF_CRC_UNCHECKED)
-			crc = crc32(crc, buf, sg_bytes);
-		memcpy((char *)page_addr + (off & ~PAGE_MASK), buf,
-		       sg_bytes);
-
-		kunmap_atomic(page_addr, KM_SOFTIRQ0);
-		buf += sg_bytes;
-		offset += sg_bytes;
-		remaining -= sg_bytes;
-		copy_len += sg_bytes;
-	}
-
-	if (fr_flags(fp) & FCPHF_CRC_UNCHECKED) {
+	if (!(fr_flags(fp) & FCPHF_CRC_UNCHECKED)) {
+		copy_len = fc_copy_buffer_to_sglist(buf, len, sg, &nents,
+						    &offset, KM_SOFTIRQ0, NULL);
+	} else {
+		crc = crc32(~0, (u8 *) fh, sizeof(*fh));
+		copy_len = fc_copy_buffer_to_sglist(buf, len, sg, &nents,
+						    &offset, KM_SOFTIRQ0, &crc);
 		buf = fc_frame_payload_get(fp, 0);
-		if (len % 4) {
+		if (len % 4)
 			crc = crc32(crc, buf + len, 4 - (len % 4));
-			len += 4 - (len % 4);
-		}
 
 		if (~crc != le32_to_cpu(fr_crc(fp))) {
 crc_err:
diff --git a/drivers/scsi/libfc/fc_libfc.c b/drivers/scsi/libfc/fc_libfc.c
index 01418ae..295eafb 100644
--- a/drivers/scsi/libfc/fc_libfc.c
+++ b/drivers/scsi/libfc/fc_libfc.c
@@ -72,3 +72,63 @@ static void __exit libfc_exit(void)
 	fc_destroy_rport();
 }
 module_exit(libfc_exit);
+
+/**
+ * fc_copy_buffer_to_sglist() - This routine copies the data of a buffer
+ *                              into a scatter-gather list (SG list).
+ *
+ * @buf: pointer to the data buffer.
+ * @len: the byte-length of the data buffer.
+ * @sg: pointer to the pointer of the SG list.
+ * @nents: pointer to the remaining number of entries in the SG list.
+ * @offset: pointer to the current offset in the SG list.
+ * @km_type: dedicated page table slot type for kmap_atomic.
+ * @crc: pointer to the 32-bit crc value.
+ *       If crc is NULL, CRC is not calculated.
+ */
+u32 fc_copy_buffer_to_sglist(void *buf, size_t len,
+			     struct scatterlist *sg,
+			     u32 *nents, size_t *offset,
+			     enum km_type km_type, u32 *crc)
+{
+	size_t remaining = len;
+	u32 copy_len = 0;
+
+	while (remaining > 0 && sg) {
+		size_t off, sg_bytes;
+		void *page_addr;
+
+		if (*offset >= sg->length) {
+			/*
+			 * Check for end and drop resources
+			 * from the last iteration.
+			 */
+			if (!(*nents))
+				break;
+			--(*nents);
+			*offset -= sg->length;
+			sg = sg_next(sg);
+			continue;
+		}
+		sg_bytes = min(remaining, sg->length - *offset);
+
+		/*
+		 * The scatterlist item may be bigger than PAGE_SIZE,
+		 * but we are limited to mapping PAGE_SIZE at a time.
+		 */
+		off = *offset + sg->offset;
+		sg_bytes = min(sg_bytes,
+			       (size_t)(PAGE_SIZE - (off & ~PAGE_MASK)));
+		page_addr = kmap_atomic(sg_page(sg) + (off >> PAGE_SHIFT),
+					km_type);
+		if (crc)
+			*crc = crc32(*crc, buf, sg_bytes);
+		memcpy((char *)page_addr + (off & ~PAGE_MASK), buf, sg_bytes);
+		kunmap_atomic(page_addr, km_type);
+		buf += sg_bytes;
+		*offset += sg_bytes;
+		remaining -= sg_bytes;
+		copy_len += sg_bytes;
+	}
+	return copy_len;
+}
diff --git a/drivers/scsi/libfc/fc_libfc.h b/drivers/scsi/libfc/fc_libfc.h
index 0530149..e4b5e92 100644
--- a/drivers/scsi/libfc/fc_libfc.h
+++ b/drivers/scsi/libfc/fc_libfc.h
@@ -101,4 +101,12 @@ void fc_destroy_fcp(void);
  */
 const char *fc_els_resp_type(struct fc_frame *);
 
+/*
+ * Copies a buffer into an sg list
+ */
+u32 fc_copy_buffer_to_sglist(void *buf, size_t len,
+			     struct scatterlist *sg,
+			     u32 *nents, size_t *offset,
+			     enum km_type km_type, u32 *crc);
+
 #endif /* _FC_LIBFC_H_ */

[PATCH 26/35] libfc, fcoe: Add FC passthrough support

[Robert Love]

From: Steve Ma <steve.ma@intel.com>

This is the Open-FCoE implementation of the FC
passthrough support via bsg interface.

Passthrough support is added to both N_Ports and
VN_Ports.

Signed-off-by: Steve Ma <steve.ma@intel.com>
Signed-off-by: Robert Love <robert.w.love@intel.com>
---

 drivers/scsi/fcoe/fcoe.c      |    4 +
 drivers/scsi/libfc/fc_lport.c |  267 +++++++++++++++++++++++++++++++++++++++++
 include/scsi/libfc.h          |    7 +
 3 files changed, 278 insertions(+), 0 deletions(-)

diff --git a/drivers/scsi/fcoe/fcoe.c b/drivers/scsi/fcoe/fcoe.c
index ba9de9d..ecd1b9d 100644
--- a/drivers/scsi/fcoe/fcoe.c
+++ b/drivers/scsi/fcoe/fcoe.c
@@ -134,6 +134,8 @@ struct fc_function_template fcoe_transport_function = {
 	.vport_delete = fcoe_vport_destroy,
 	.vport_disable = fcoe_vport_disable,
 	.set_vport_symbolic_name = fcoe_set_vport_symbolic_name,
+
+	.bsg_request = fc_lport_bsg_request,
 };
 
 struct fc_function_template fcoe_vport_transport_function = {
@@ -167,6 +169,8 @@ struct fc_function_template fcoe_vport_transport_function = {
 	.issue_fc_host_lip = fcoe_reset,
 
 	.terminate_rport_io = fc_rport_terminate_io,
+
+	.bsg_request = fc_lport_bsg_request,
 };
 
 static struct scsi_host_template fcoe_shost_template = {
diff --git a/drivers/scsi/libfc/fc_lport.c b/drivers/scsi/libfc/fc_lport.c
index f6fc9f4..33f4c2f 100644
--- a/drivers/scsi/libfc/fc_lport.c
+++ b/drivers/scsi/libfc/fc_lport.c
@@ -94,6 +94,7 @@
 
 #include <scsi/libfc.h>
 #include <scsi/fc_encode.h>
+#include <linux/scatterlist.h>
 
 #include "fc_libfc.h"
 
@@ -127,6 +128,24 @@ static const char *fc_lport_state_names[] = {
 	[LPORT_ST_RESET] =    "reset",
 };
 
+/**
+ * struct fc_bsg_info - FC Passthrough managemet structure
+ * @job:      The passthrough job
+ * @lport:    The local port to pass through a command
+ * @rsp_code: The expected response code
+ * @sg:       job->reply_payload.sg_list
+ * @nents:    job->reply_payload.sg_cnt
+ * @offset:   The offset into the response data
+ */
+struct fc_bsg_info {
+	struct fc_bsg_job *job;
+	struct fc_lport *lport;
+	u16 rsp_code;
+	struct scatterlist *sg;
+	u32 nents;
+	size_t offset;
+};
+
 static int fc_frame_drop(struct fc_lport *lport, struct fc_frame *fp)
 {
 	fc_frame_free(fp);
@@ -1509,3 +1528,251 @@ int fc_lport_init(struct fc_lport *lport)
 	return 0;
 }
 EXPORT_SYMBOL(fc_lport_init);
+
+/**
+ * fc_lport_bsg_resp() - The common response handler for fc pass-thru requests
+ * @sp: current sequence in the fc pass-thru request exchange
+ * @fp: received response frame
+ * @info_arg: pointer to struct fc_bsg_info
+ */
+static void fc_lport_bsg_resp(struct fc_seq *sp, struct fc_frame *fp,
+			      void *info_arg)
+{
+	struct fc_bsg_info *info = info_arg;
+	struct fc_bsg_job *job = info->job;
+	struct fc_lport *lport = info->lport;
+	struct fc_frame_header *fh;
+	size_t len;
+	void *buf;
+
+	if (IS_ERR(fp)) {
+		job->reply->result = (PTR_ERR(fp) == -FC_EX_CLOSED) ?
+			-ECONNABORTED : -ETIMEDOUT;
+		job->reply_len = sizeof(uint32_t);
+		job->state_flags |= FC_RQST_STATE_DONE;
+		job->job_done(job);
+		kfree(info);
+		return;
+	}
+
+	mutex_lock(&lport->lp_mutex);
+	fh = fc_frame_header_get(fp);
+	len = fr_len(fp) - sizeof(*fh);
+	buf = fc_frame_payload_get(fp, 0);
+
+	if (fr_sof(fp) == FC_SOF_I3 && !ntohs(fh->fh_seq_cnt)) {
+		/* Get the response code from the first frame payload */
+		unsigned short cmd = (info->rsp_code == FC_FS_ACC) ?
+			ntohs(((struct fc_ct_hdr *)buf)->ct_cmd) :
+			(unsigned short)fc_frame_payload_op(fp);
+
+		/* Save the reply status of the job */
+		job->reply->reply_data.ctels_reply.status =
+			(cmd == info->rsp_code) ?
+			FC_CTELS_STATUS_OK : FC_CTELS_STATUS_REJECT;
+	}
+
+	job->reply->reply_payload_rcv_len +=
+		fc_copy_buffer_to_sglist(buf, len, info->sg, &info->nents,
+					 &info->offset, KM_BIO_SRC_IRQ, NULL);
+
+	if (fr_eof(fp) == FC_EOF_T &&
+	    (ntoh24(fh->fh_f_ctl) & (FC_FC_LAST_SEQ | FC_FC_END_SEQ)) ==
+	    (FC_FC_LAST_SEQ | FC_FC_END_SEQ)) {
+		if (job->reply->reply_payload_rcv_len >
+		    job->reply_payload.payload_len)
+			job->reply->reply_payload_rcv_len =
+				job->reply_payload.payload_len;
+		job->reply->result = 0;
+		job->state_flags |= FC_RQST_STATE_DONE;
+		job->job_done(job);
+		kfree(info);
+	}
+	fc_frame_free(fp);
+	mutex_unlock(&lport->lp_mutex);
+}
+
+/**
+ * fc_lport_els_request() - Send ELS pass-thru request
+ * @job: The bsg fc pass-thru job structure
+ * @lport: The local port sending the request
+ * @did: The destination port id.
+ *
+ * Locking Note: The lport lock is expected to be held before calling
+ * this routine.
+ */
+static int fc_lport_els_request(struct fc_bsg_job *job,
+				struct fc_lport *lport,
+				u32 did, u32 tov)
+{
+	struct fc_bsg_info *info;
+	struct fc_frame *fp;
+	struct fc_frame_header *fh;
+	char *pp;
+	int len;
+
+	fp = fc_frame_alloc(lport, sizeof(struct fc_frame_header) +
+			    job->request_payload.payload_len);
+	if (!fp)
+		return -ENOMEM;
+
+	len = job->request_payload.payload_len;
+	pp = fc_frame_payload_get(fp, len);
+
+	sg_copy_to_buffer(job->request_payload.sg_list,
+			  job->request_payload.sg_cnt,
+			  pp, len);
+
+	fh = fc_frame_header_get(fp);
+	fh->fh_r_ctl = FC_RCTL_ELS_REQ;
+	hton24(fh->fh_d_id, did);
+	hton24(fh->fh_s_id, fc_host_port_id(lport->host));
+	fh->fh_type = FC_TYPE_ELS;
+	hton24(fh->fh_f_ctl, FC_FC_FIRST_SEQ |
+	       FC_FC_END_SEQ | FC_FC_SEQ_INIT);
+	fh->fh_cs_ctl = 0;
+	fh->fh_df_ctl = 0;
+	fh->fh_parm_offset = 0;
+
+	info = kzalloc(sizeof(struct fc_bsg_info), GFP_KERNEL);
+	if (!info) {
+		fc_frame_free(fp);
+		return -ENOMEM;
+	}
+
+	info->job = job;
+	info->lport = lport;
+	info->rsp_code = ELS_LS_ACC;
+	info->nents = job->reply_payload.sg_cnt;
+	info->sg = job->reply_payload.sg_list;
+
+	if (!lport->tt.exch_seq_send(lport, fp, fc_lport_bsg_resp,
+				     NULL, info, tov))
+		return -ECOMM;
+	return 0;
+}
+
+/**
+ * fc_lport_ct_request() - Send CT pass-thru request
+ * @job:   The bsg fc pass-thru job structure
+ * @lport: The local port sending the request
+ * @did:   The destination FC-ID
+ * @tov:   The time to wait for a response
+ *
+ * Locking Note: The lport lock is expected to be held before calling
+ * this routine.
+ */
+static int fc_lport_ct_request(struct fc_bsg_job *job,
+			       struct fc_lport *lport, u32 did, u32 tov)
+{
+	struct fc_bsg_info *info;
+	struct fc_frame *fp;
+	struct fc_frame_header *fh;
+	struct fc_ct_req *ct;
+	size_t len;
+
+	fp = fc_frame_alloc(lport, sizeof(struct fc_ct_hdr) +
+			    job->request_payload.payload_len);
+	if (!fp)
+		return -ENOMEM;
+
+	len = job->request_payload.payload_len;
+	ct = fc_frame_payload_get(fp, len);
+
+	sg_copy_to_buffer(job->request_payload.sg_list,
+			  job->request_payload.sg_cnt,
+			  ct, len);
+
+	fh = fc_frame_header_get(fp);
+	fh->fh_r_ctl = FC_RCTL_DD_UNSOL_CTL;
+	hton24(fh->fh_d_id, did);
+	hton24(fh->fh_s_id, fc_host_port_id(lport->host));
+	fh->fh_type = FC_TYPE_CT;
+	hton24(fh->fh_f_ctl, FC_FC_FIRST_SEQ |
+	       FC_FC_END_SEQ | FC_FC_SEQ_INIT);
+	fh->fh_cs_ctl = 0;
+	fh->fh_df_ctl = 0;
+	fh->fh_parm_offset = 0;
+
+	info = kzalloc(sizeof(struct fc_bsg_info), GFP_KERNEL);
+	if (!info) {
+		fc_frame_free(fp);
+		return -ENOMEM;
+	}
+
+	info->job = job;
+	info->lport = lport;
+	info->rsp_code = FC_FS_ACC;
+	info->nents = job->reply_payload.sg_cnt;
+	info->sg = job->reply_payload.sg_list;
+
+	if (!lport->tt.exch_seq_send(lport, fp, fc_lport_bsg_resp,
+				     NULL, info, tov))
+		return -ECOMM;
+	return 0;
+}
+
+/**
+ * fc_lport_bsg_request() - The common entry point for sending
+ *                          fc pass-thru requests
+ * @job: The fc pass-thru job structure
+ */
+int fc_lport_bsg_request(struct fc_bsg_job *job)
+{
+	struct request *rsp = job->req->next_rq;
+	struct Scsi_Host *shost = job->shost;
+	struct fc_lport *lport = shost_priv(shost);
+	struct fc_rport *rport;
+	struct fc_rport_priv *rdata;
+	int rc = -EINVAL;
+	u32 did;
+
+	job->reply->reply_payload_rcv_len = 0;
+	rsp->resid_len = job->reply_payload.payload_len;
+
+	mutex_lock(&lport->lp_mutex);
+
+	switch (job->request->msgcode) {
+	case FC_BSG_RPT_ELS:
+		rport = job->rport;
+		if (!rport)
+			break;
+
+		rdata = rport->dd_data;
+		rc = fc_lport_els_request(job, lport, rport->port_id,
+					  rdata->e_d_tov);
+		break;
+
+	case FC_BSG_RPT_CT:
+		rport = job->rport;
+		if (!rport)
+			break;
+
+		rdata = rport->dd_data;
+		rc = fc_lport_ct_request(job, lport, rport->port_id,
+					 rdata->e_d_tov);
+		break;
+
+	case FC_BSG_HST_CT:
+		did = ntoh24(job->request->rqst_data.h_ct.port_id);
+		if (did == FC_FID_DIR_SERV)
+			rdata = lport->dns_rp;
+		else
+			rdata = lport->tt.rport_lookup(lport, did);
+
+		if (!rdata)
+			break;
+
+		rc = fc_lport_ct_request(job, lport, did, rdata->e_d_tov);
+		break;
+
+	case FC_BSG_HST_ELS_NOLOGIN:
+		did = ntoh24(job->request->rqst_data.h_els.port_id);
+		rc = fc_lport_els_request(job, lport, did, lport->e_d_tov);
+		break;
+	}
+
+	mutex_unlock(&lport->lp_mutex);
+	return rc;
+}
+EXPORT_SYMBOL(fc_lport_bsg_request);
diff --git a/include/scsi/libfc.h b/include/scsi/libfc.h
index a5579c3..3e2df39 100644
--- a/include/scsi/libfc.h
+++ b/include/scsi/libfc.h
@@ -26,6 +26,7 @@
 
 #include <scsi/scsi_transport.h>
 #include <scsi/scsi_transport_fc.h>
+#include <scsi/scsi_bsg_fc.h>
 
 #include <scsi/fc/fc_fcp.h>
 #include <scsi/fc/fc_ns.h>
@@ -831,6 +832,12 @@ void fc_vport_setlink(struct fc_lport *vn_port);
 void fc_vports_linkchange(struct fc_lport *n_port);
 
 /*
+ * Issue fc pass-thru request via bsg interface
+ */
+int fc_lport_bsg_request(struct fc_bsg_job *job);
+
+
+/*
  * REMOTE PORT LAYER
  *****************************/
 int fc_rport_init(struct fc_lport *lp);

[PATCH 27/35] libfc, fcoe: Don't EXPORT_SYMBOLS unnecessarily

[Robert Love]

These are a few functions that were not used by other
modules. They did not need to be exported so this patch
removes the EXPORT_SYMBOLS call for each.

Signed-off-by: Robert Love <robert.w.love@intel.com>
---

 drivers/scsi/libfc/fc_exch.c  |    1 -
 drivers/scsi/libfc/fc_fcp.c   |    1 -
 drivers/scsi/libfc/fc_frame.c |    1 -
 drivers/scsi/libfc/fc_rport.c |    2 --
 4 files changed, 0 insertions(+), 5 deletions(-)

diff --git a/drivers/scsi/libfc/fc_exch.c b/drivers/scsi/libfc/fc_exch.c
index c40eab5..8e815d4 100644
--- a/drivers/scsi/libfc/fc_exch.c
+++ b/drivers/scsi/libfc/fc_exch.c
@@ -519,7 +519,6 @@ static int fc_seq_exch_abort(const struct fc_seq *req_sp,
 		error = -ENOBUFS;
 	return error;
 }
-EXPORT_SYMBOL(fc_seq_exch_abort);
 
 /*
  * Exchange timeout - handle exchange timer expiration.
diff --git a/drivers/scsi/libfc/fc_fcp.c b/drivers/scsi/libfc/fc_fcp.c
index a474773..a523e4f 100644
--- a/drivers/scsi/libfc/fc_fcp.c
+++ b/drivers/scsi/libfc/fc_fcp.c
@@ -279,7 +279,6 @@ void fc_fcp_ddp_setup(struct fc_fcp_pkt *fsp, u16 xid)
 			fsp->xfer_ddp = xid;
 	}
 }
-EXPORT_SYMBOL(fc_fcp_ddp_setup);
 
 /*
  * fc_fcp_ddp_done - calls to LLD's ddp_done to release any
diff --git a/drivers/scsi/libfc/fc_frame.c b/drivers/scsi/libfc/fc_frame.c
index c5f4484..8ddb685 100644
--- a/drivers/scsi/libfc/fc_frame.c
+++ b/drivers/scsi/libfc/fc_frame.c
@@ -70,7 +70,6 @@ struct fc_frame *__fc_frame_alloc(size_t len)
 }
 EXPORT_SYMBOL(__fc_frame_alloc);
 
-
 struct fc_frame *fc_frame_alloc_fill(struct fc_lport *lp, size_t payload_len)
 {
 	struct fc_frame *fp;
diff --git a/drivers/scsi/libfc/fc_rport.c b/drivers/scsi/libfc/fc_rport.c
index bf42a98..239fe54 100644
--- a/drivers/scsi/libfc/fc_rport.c
+++ b/drivers/scsi/libfc/fc_rport.c
@@ -1567,13 +1567,11 @@ int fc_setup_rport(void)
 		return -ENOMEM;
 	return 0;
 }
-EXPORT_SYMBOL(fc_setup_rport);
 
 void fc_destroy_rport(void)
 {
 	destroy_workqueue(rport_event_queue);
 }
-EXPORT_SYMBOL(fc_destroy_rport);
 
 void fc_rport_terminate_io(struct fc_rport *rport)
 {

[PATCH 28/35] libfc: Remove unused fc_lport pointer from fc_fcp_pkt_abort

[Robert Love]

This argument isn't used, let's not pass it into the routine.

Signed-off-by: Robert Love <robert.w.love@intel.com>
---

 drivers/scsi/libfc/fc_fcp.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/scsi/libfc/fc_fcp.c b/drivers/scsi/libfc/fc_fcp.c
index a523e4f..fb4b35d 100644
--- a/drivers/scsi/libfc/fc_fcp.c
+++ b/drivers/scsi/libfc/fc_fcp.c
@@ -1055,7 +1055,7 @@ unlock:
  * Scsi abort handler- calls to send an abort
  * and then wait for abort completion
  */
-static int fc_fcp_pkt_abort(struct fc_lport *lp, struct fc_fcp_pkt *fsp)
+static int fc_fcp_pkt_abort(struct fc_fcp_pkt *fsp)
 {
 	int rc = FAILED;
 
@@ -1871,7 +1871,7 @@ int fc_eh_abort(struct scsi_cmnd *sc_cmd)
 		goto release_pkt;
 	}
 
-	rc = fc_fcp_pkt_abort(lp, fsp);
+	rc = fc_fcp_pkt_abort(fsp);
 	fc_fcp_unlock_pkt(fsp);
 
 release_pkt:

[PATCH 29/35] libfc: Formatting cleanups across libfc

[Robert Love]

This patch makes a variety of cleanup changes to all libfc files.

This patch adds kernel-doc headers to all functions lacking them
and attempts to better format existing headers. It also add kernel-doc
headers to structures.

This patch ensures that the current naming conventions for local ports,
remote ports and remote port private data is upheld in the following
manner.

struct               instance (i.e. variable name)
--------------------------------------------------
fc_lport                      lport
fc_rport                      rport
fc_rport_libfc_priv           rpriv
fc_rport_priv                 rdata

I also renamed dns_rp and ptp_rp to dns_rdata and ptp_rdata
respectively.

I used emacs 'indent-region' and 'tabify' on all libfc files
to correct spacing alignments.

I feel sorry for anyone attempting to review this patch.

Signed-off-by: Robert Love <robert.w.love@intel.com>
---

 drivers/scsi/libfc/fc_disc.c  |   78 ++-
 drivers/scsi/libfc/fc_elsct.c |   33 +
 drivers/scsi/libfc/fc_exch.c  |  595 ++++++++++++++++--------
 drivers/scsi/libfc/fc_fcp.c   |  667 ++++++++++++++++-----------
 drivers/scsi/libfc/fc_libfc.c |    4 
 drivers/scsi/libfc/fc_libfc.h |   34 +
 drivers/scsi/libfc/fc_lport.c |  253 ++++++----
 drivers/scsi/libfc/fc_rport.c |  237 +++++-----
 include/scsi/libfc.h          |  999 +++++++++++++++++++++--------------------
 9 files changed, 1640 insertions(+), 1260 deletions(-)

diff --git a/drivers/scsi/libfc/fc_disc.c b/drivers/scsi/libfc/fc_disc.c
index c42bf90..77949fd 100644
--- a/drivers/scsi/libfc/fc_disc.c
+++ b/drivers/scsi/libfc/fc_disc.c
@@ -53,8 +53,8 @@ static int fc_disc_single(struct fc_lport *, struct fc_disc_port *);
 static void fc_disc_restart(struct fc_disc *);
 
 /**
- * fc_disc_stop_rports() - delete all the remote ports associated with the lport
- * @disc: The discovery job to stop rports on
+ * fc_disc_stop_rports() - Delete all the remote ports associated with the lport
+ * @disc: The discovery job to stop remote ports on
  *
  * Locking Note: This function expects that the lport mutex is locked before
  * calling it.
@@ -74,9 +74,9 @@ void fc_disc_stop_rports(struct fc_disc *disc)
 
 /**
  * fc_disc_recv_rscn_req() - Handle Registered State Change Notification (RSCN)
- * @sp: Current sequence of the RSCN exchange
- * @fp: RSCN Frame
- * @lport: Fibre Channel host port instance
+ * @sp:	   The sequence of the RSCN exchange
+ * @fp:	   The RSCN frame
+ * @lport: The local port that the request will be sent on
  *
  * Locking Note: This function expects that the disc_mutex is locked
  *		 before it is called.
@@ -185,9 +185,9 @@ reject:
 
 /**
  * fc_disc_recv_req() - Handle incoming requests
- * @sp: Current sequence of the request exchange
- * @fp: The frame
- * @lport: The FC local port
+ * @sp:	   The sequence of the request exchange
+ * @fp:	   The request frame
+ * @lport: The local port receiving the request
  *
  * Locking Note: This function is called from the EM and will lock
  *		 the disc_mutex before calling the handler for the
@@ -215,7 +215,7 @@ static void fc_disc_recv_req(struct fc_seq *sp, struct fc_frame *fp,
 
 /**
  * fc_disc_restart() - Restart discovery
- * @lport: FC discovery context
+ * @disc: The discovery object to be restarted
  *
  * Locking Note: This function expects that the disc mutex
  *		 is already locked.
@@ -242,9 +242,9 @@ static void fc_disc_restart(struct fc_disc *disc)
 }
 
 /**
- * fc_disc_start() - Fibre Channel Target discovery
- * @lport: FC local port
- * @disc_callback: function to be called when discovery is complete
+ * fc_disc_start() - Start discovery on a local port
+ * @lport:	   The local port to have discovery started on
+ * @disc_callback: Callback function to be called when discovery is complete
  */
 static void fc_disc_start(void (*disc_callback)(struct fc_lport *,
 						enum fc_disc_event),
@@ -265,8 +265,8 @@ static void fc_disc_start(void (*disc_callback)(struct fc_lport *,
 
 /**
  * fc_disc_done() - Discovery has been completed
- * @disc: FC discovery context
- * @event: discovery completion status
+ * @disc:  The discovery context
+ * @event: The discovery completion status
  *
  * Locking Note: This function expects that the disc mutex is locked before
  * it is called. The discovery callback is then made with the lock released,
@@ -286,8 +286,8 @@ static void fc_disc_done(struct fc_disc *disc, enum fc_disc_event event)
 	}
 
 	/*
-	 * Go through all remote ports.  If they were found in the latest
-	 * discovery, reverify or log them in.  Otherwise, log them out.
+	 * Go through all remote ports.	 If they were found in the latest
+	 * discovery, reverify or log them in.	Otherwise, log them out.
 	 * Skip ports which were never discovered.  These are the dNS port
 	 * and ports which were created by PLOGI.
 	 */
@@ -307,8 +307,8 @@ static void fc_disc_done(struct fc_disc *disc, enum fc_disc_event event)
 
 /**
  * fc_disc_error() - Handle error on dNS request
- * @disc: FC discovery context
- * @fp: The frame pointer
+ * @disc: The discovery context
+ * @fp:	  The error code encoded as a frame pointer
  */
 static void fc_disc_error(struct fc_disc *disc, struct fc_frame *fp)
 {
@@ -344,7 +344,7 @@ static void fc_disc_error(struct fc_disc *disc, struct fc_frame *fp)
 
 /**
  * fc_disc_gpn_ft_req() - Send Get Port Names by FC-4 type (GPN_FT) request
- * @lport: FC discovery context
+ * @lport: The discovery context
  *
  * Locking Note: This function expects that the disc_mutex is locked
  *		 before it is called.
@@ -378,9 +378,9 @@ err:
 
 /**
  * fc_disc_gpn_ft_parse() - Parse the body of the dNS GPN_FT response.
- * @lport: Fibre Channel host port instance
- * @buf: GPN_FT response buffer
- * @len: size of response buffer
+ * @lport: The local port the GPN_FT was received on
+ * @buf:   The GPN_FT response buffer
+ * @len:   The size of response buffer
  *
  * Goes through the list of IDs and names resulting from a request.
  */
@@ -479,10 +479,8 @@ static int fc_disc_gpn_ft_parse(struct fc_disc *disc, void *buf, size_t len)
 }
 
 /**
- * fc_disc_timeout() - Retry handler for the disc component
- * @work: Structure holding disc obj that needs retry discovery
- *
- * Handle retry of memory allocation for remote ports.
+ * fc_disc_timeout() - Handler for discovery timeouts
+ * @work: Structure holding discovery context that needs to retry discovery
  */
 static void fc_disc_timeout(struct work_struct *work)
 {
@@ -496,9 +494,9 @@ static void fc_disc_timeout(struct work_struct *work)
 
 /**
  * fc_disc_gpn_ft_resp() - Handle a response frame from Get Port Names (GPN_FT)
- * @sp: Current sequence of GPN_FT exchange
- * @fp: response frame
- * @lp_arg: Fibre Channel host port instance
+ * @sp:	    The sequence that the GPN_FT response was received on
+ * @fp:	    The GPN_FT response frame
+ * @lp_arg: The discovery context
  *
  * Locking Note: This function is called without disc mutex held, and
  *		 should do all its processing with the mutex held
@@ -569,9 +567,9 @@ static void fc_disc_gpn_ft_resp(struct fc_seq *sp, struct fc_frame *fp,
 
 /**
  * fc_disc_gpn_id_resp() - Handle a response frame from Get Port Names (GPN_ID)
- * @sp: exchange sequence
- * @fp: response frame
- * @rdata_arg: remote port private data
+ * @sp:	       The sequence the GPN_ID is on
+ * @fp:	       The response frame
+ * @rdata_arg: The remote port that sent the GPN_ID response
  *
  * Locking Note: This function is called without disc mutex held.
  */
@@ -639,7 +637,7 @@ out:
 
 /**
  * fc_disc_gpn_id_req() - Send Get Port Names by ID (GPN_ID) request
- * @lport: local port
+ * @lport: The local port to initiate discovery on
  * @rdata: remote port private data
  *
  * Locking Note: This function expects that the disc_mutex is locked
@@ -656,7 +654,7 @@ static int fc_disc_gpn_id_req(struct fc_lport *lport,
 	if (!fp)
 		return -ENOMEM;
 	if (!lport->tt.elsct_send(lport, rdata->ids.port_id, fp, FC_NS_GPN_ID,
-				 fc_disc_gpn_id_resp, rdata, lport->e_d_tov))
+				  fc_disc_gpn_id_resp, rdata, lport->e_d_tov))
 		return -ENOMEM;
 	kref_get(&rdata->kref);
 	return 0;
@@ -664,8 +662,8 @@ static int fc_disc_gpn_id_req(struct fc_lport *lport,
 
 /**
  * fc_disc_single() - Discover the directory information for a single target
- * @lport: local port
- * @dp: The port to rediscover
+ * @lport: The local port the remote port is associated with
+ * @dp:	   The port to rediscover
  *
  * Locking Note: This function expects that the disc_mutex is locked
  *		 before it is called.
@@ -683,7 +681,7 @@ static int fc_disc_single(struct fc_lport *lport, struct fc_disc_port *dp)
 
 /**
  * fc_disc_stop() - Stop discovery for a given lport
- * @lport: The lport that discovery should stop for
+ * @lport: The local port that discovery should stop on
  */
 void fc_disc_stop(struct fc_lport *lport)
 {
@@ -697,7 +695,7 @@ void fc_disc_stop(struct fc_lport *lport)
 
 /**
  * fc_disc_stop_final() - Stop discovery for a given lport
- * @lport: The lport that discovery should stop for
+ * @lport: The lport that discovery should stop on
  *
  * This function will block until discovery has been
  * completely stopped and all rports have been deleted.
@@ -709,8 +707,8 @@ void fc_disc_stop_final(struct fc_lport *lport)
 }
 
 /**
- * fc_disc_init() - Initialize the discovery block
- * @lport: FC local port
+ * fc_disc_init() - Initialize the discovery layer for a local port
+ * @lport: The local port that needs the discovery layer to be initialized
  */
 int fc_disc_init(struct fc_lport *lport)
 {
diff --git a/drivers/scsi/libfc/fc_elsct.c b/drivers/scsi/libfc/fc_elsct.c
index 01ab3d5..59183fb 100644
--- a/drivers/scsi/libfc/fc_elsct.c
+++ b/drivers/scsi/libfc/fc_elsct.c
@@ -28,17 +28,22 @@
 #include <scsi/libfc.h>
 #include <scsi/fc_encode.h>
 
-/*
- * fc_elsct_send - sends ELS/CT frame
+/**
+ * fc_elsct_send() - Send an ELS or CT frame
+ * @lport:	The local port to send the frame on
+ * @did:	The destination ID for the frame
+ * @fp:		The frame to be sent
+ * @op:		The operational code
+ * @resp:	The callback routine when the response is received
+ * @arg:	The argument to pass to the response callback routine
+ * @timer_msec: The timeout period for the frame (in msecs)
  */
-struct fc_seq *fc_elsct_send(struct fc_lport *lport,
-				    u32 did,
-				    struct fc_frame *fp,
-				    unsigned int op,
-				    void (*resp)(struct fc_seq *,
-						 struct fc_frame *fp,
-						 void *arg),
-				    void *arg, u32 timer_msec)
+struct fc_seq *fc_elsct_send(struct fc_lport *lport, u32 did,
+			     struct fc_frame *fp, unsigned int op,
+			     void (*resp)(struct fc_seq *,
+					  struct fc_frame *,
+					  void *),
+			     void *arg, u32 timer_msec)
 {
 	enum fc_rctl r_ctl;
 	enum fc_fh_type fh_type;
@@ -63,6 +68,10 @@ struct fc_seq *fc_elsct_send(struct fc_lport *lport,
 }
 EXPORT_SYMBOL(fc_elsct_send);
 
+/**
+ * fc_elsct_init() - Initialize the ELS/CT layer
+ * @lport: The local port to initialize the ELS/CT layer for
+ */
 int fc_elsct_init(struct fc_lport *lport)
 {
 	if (!lport->tt.elsct_send)
@@ -73,8 +82,8 @@ int fc_elsct_init(struct fc_lport *lport)
 EXPORT_SYMBOL(fc_elsct_init);
 
 /**
- * fc_els_resp_type() - return string describing ELS response for debug.
- * @fp: frame pointer with possible error code.
+ * fc_els_resp_type() - Return a string describing the ELS response
+ * @fp: The frame pointer or possible error code
  */
 const char *fc_els_resp_type(struct fc_frame *fp)
 {
diff --git a/drivers/scsi/libfc/fc_exch.c b/drivers/scsi/libfc/fc_exch.c
index 8e815d4..dec61e5 100644
--- a/drivers/scsi/libfc/fc_exch.c
+++ b/drivers/scsi/libfc/fc_exch.c
@@ -37,7 +37,7 @@
 u16	fc_cpu_mask;		/* cpu mask for possible cpus */
 EXPORT_SYMBOL(fc_cpu_mask);
 static u16	fc_cpu_order;	/* 2's power to represent total possible cpus */
-static struct kmem_cache *fc_em_cachep;        /* cache for exchanges */
+static struct kmem_cache *fc_em_cachep;	       /* cache for exchanges */
 
 /*
  * Structure and function definitions for managing Fibre Channel Exchanges
@@ -52,35 +52,48 @@ static struct kmem_cache *fc_em_cachep;        /* cache for exchanges */
  * fc_seq holds the state for an individual sequence.
  */
 
-/*
- * Per cpu exchange pool
+/**
+ * struct fc_exch_pool - Per cpu exchange pool
+ * @next_index:	  Next possible free exchange index
+ * @total_exches: Total allocated exchanges
+ * @lock:	  Exch pool lock
+ * @ex_list:	  List of exchanges
  *
  * This structure manages per cpu exchanges in array of exchange pointers.
  * This array is allocated followed by struct fc_exch_pool memory for
  * assigned range of exchanges to per cpu pool.
  */
 struct fc_exch_pool {
-	u16		next_index;	/* next possible free exchange index */
-	u16		total_exches;	/* total allocated exchanges */
-	spinlock_t	lock;		/* exch pool lock */
-	struct list_head	ex_list;	/* allocated exchanges list */
+	u16		 next_index;
+	u16		 total_exches;
+	spinlock_t	 lock;
+	struct list_head ex_list;
 };
 
-/*
- * Exchange manager.
+/**
+ * struct fc_exch_mgr - The Exchange Manager (EM).
+ * @class:	    Default class for new sequences
+ * @kref:	    Reference counter
+ * @min_xid:	    Minimum exchange ID
+ * @max_xid:	    Maximum exchange ID
+ * @ex_list:	    Allocated exchange list
+ * @ep_pool:	    Reserved exchange pointers
+ * @pool_max_index: Max exch array index in exch pool
+ * @pool:	    Per cpu exch pool
+ * @stats:	    Statistics structure
  *
  * This structure is the center for creating exchanges and sequences.
  * It manages the allocation of exchange IDs.
  */
 struct fc_exch_mgr {
-	enum fc_class	class;		/* default class for sequences */
-	struct kref	kref;		/* exchange mgr reference count */
-	u16		min_xid;	/* min exchange ID */
-	u16		max_xid;	/* max exchange ID */
-	struct list_head	ex_list;	/* allocated exchanges list */
-	mempool_t	*ep_pool;	/* reserve ep's */
-	u16		pool_max_index;	/* max exch array index in exch pool */
-	struct fc_exch_pool *pool;	/* per cpu exch pool */
+	enum fc_class	class;
+	struct kref	kref;
+	u16		min_xid;
+	u16		max_xid;
+	struct list_head	ex_list;
+	mempool_t	*ep_pool;
+	u16		pool_max_index;
+	struct fc_exch_pool *pool;
 
 	/*
 	 * currently exchange mgr stats are updated but not used.
@@ -98,6 +111,18 @@ struct fc_exch_mgr {
 };
 #define	fc_seq_exch(sp) container_of(sp, struct fc_exch, seq)
 
+/**
+ * struct fc_exch_mgr_anchor - primary structure for list of EMs
+ * @ema_list: Exchange Manager Anchor list
+ * @mp:	      Exchange Manager associated with this anchor
+ * @match:    Routine to determine if this anchor's EM should be used
+ *
+ * When walking the list of anchors the match routine will be called
+ * for each anchor to determine if that EM should be used. The last
+ * anchor in the list will always match to handle any exchanges not
+ * handled by other EMs. The non-default EMs would be added to the
+ * anchor list by HW that provides FCoE offloads.
+ */
 struct fc_exch_mgr_anchor {
 	struct list_head ema_list;
 	struct fc_exch_mgr *mp;
@@ -197,6 +222,15 @@ static char *fc_exch_rctl_names[] = FC_RCTL_NAMES_INIT;
 
 #define FC_TABLE_SIZE(x)   (sizeof(x) / sizeof(x[0]))
 
+/**
+ * fc_exch_name_lookup() - Lookup name by opcode
+ * @op:	       Opcode to be looked up
+ * @table:     Opcode/name table
+ * @max_index: Index not to be exceeded
+ *
+ * This routine is used to determine a human-readable string identifying
+ * a R_CTL opcode.
+ */
 static inline const char *fc_exch_name_lookup(unsigned int op, char **table,
 					      unsigned int max_index)
 {
@@ -209,25 +243,34 @@ static inline const char *fc_exch_name_lookup(unsigned int op, char **table,
 	return name;
 }
 
+/**
+ * fc_exch_rctl_name() - Wrapper routine for fc_exch_name_lookup()
+ * @op: The opcode to be looked up
+ */
 static const char *fc_exch_rctl_name(unsigned int op)
 {
 	return fc_exch_name_lookup(op, fc_exch_rctl_names,
 				   FC_TABLE_SIZE(fc_exch_rctl_names));
 }
 
-/*
- * Hold an exchange - keep it from being freed.
+/**
+ * fc_exch_hold() - Increment an exchange's reference count
+ * @ep: Echange to be held
  */
-static void fc_exch_hold(struct fc_exch *ep)
+static inline void fc_exch_hold(struct fc_exch *ep)
 {
 	atomic_inc(&ep->ex_refcnt);
 }
 
-/*
- * setup fc hdr by initializing few more FC header fields and sof/eof.
- * Initialized fields by this func:
- *	- fh_ox_id, fh_rx_id, fh_seq_id, fh_seq_cnt
- *	- sof and eof
+/**
+ * fc_exch_setup_hdr() - Initialize a FC header by initializing some fields
+ *			 and determine SOF and EOF.
+ * @ep:	   The exchange to that will use the header
+ * @fp:	   The frame whose header is to be modified
+ * @f_ctl: F_CTL bits that will be used for the frame header
+ *
+ * The fields initialized by this routine are: fh_ox_id, fh_rx_id,
+ * fh_seq_id, fh_seq_cnt and the SOF and EOF.
  */
 static void fc_exch_setup_hdr(struct fc_exch *ep, struct fc_frame *fp,
 			      u32 f_ctl)
@@ -244,7 +287,7 @@ static void fc_exch_setup_hdr(struct fc_exch *ep, struct fc_frame *fp,
 		if (fc_sof_needs_ack(ep->class))
 			fr_eof(fp) = FC_EOF_N;
 		/*
-		 * Form f_ctl.
+		 * From F_CTL.
 		 * The number of fill bytes to make the length a 4-byte
 		 * multiple is the low order 2-bits of the f_ctl.
 		 * The fill itself will have been cleared by the frame
@@ -274,9 +317,12 @@ static void fc_exch_setup_hdr(struct fc_exch *ep, struct fc_frame *fp,
 	fh->fh_seq_cnt = htons(ep->seq.cnt);
 }
 
-/*
- * Release a reference to an exchange.
- * If the refcnt goes to zero and the exchange is complete, it is freed.
+/**
+ * fc_exch_release() - Decrement an exchange's reference count
+ * @ep: Exchange to be released
+ *
+ * If the reference count reaches zero and the exchange is complete,
+ * it is freed.
  */
 static void fc_exch_release(struct fc_exch *ep)
 {
@@ -291,6 +337,10 @@ static void fc_exch_release(struct fc_exch *ep)
 	}
 }
 
+/**
+ * fc_exch_done_locked() - Complete an exchange with the exchange lock held
+ * @ep: The exchange that is complete
+ */
 static int fc_exch_done_locked(struct fc_exch *ep)
 {
 	int rc = 1;
@@ -315,6 +365,15 @@ static int fc_exch_done_locked(struct fc_exch *ep)
 	return rc;
 }
 
+/**
+ * fc_exch_ptr_get() - Return an exchange from an exchange pool
+ * @pool:  Exchange Pool to get an exchange from
+ * @index: Index of the exchange within the pool
+ *
+ * Use the index to get an exchange from within an exchange pool. exches
+ * will point to an array of exchange pointers. The index will select
+ * the exchange within the array.
+ */
 static inline struct fc_exch *fc_exch_ptr_get(struct fc_exch_pool *pool,
 					      u16 index)
 {
@@ -322,12 +381,22 @@ static inline struct fc_exch *fc_exch_ptr_get(struct fc_exch_pool *pool,
 	return exches[index];
 }
 
+/**
+ * fc_exch_ptr_set() - Assign an exchange to a slot in an exchange pool
+ * @pool:  The pool to assign the exchange to
+ * @index: The index in the pool where the exchange will be assigned
+ * @ep:	   The exchange to assign to the pool
+ */
 static inline void fc_exch_ptr_set(struct fc_exch_pool *pool, u16 index,
 				   struct fc_exch *ep)
 {
 	((struct fc_exch **)(pool + 1))[index] = ep;
 }
 
+/**
+ * fc_exch_delete() - Delete an exchange
+ * @ep: The exchange to be deleted
+ */
 static void fc_exch_delete(struct fc_exch *ep)
 {
 	struct fc_exch_pool *pool;
@@ -343,8 +412,14 @@ static void fc_exch_delete(struct fc_exch *ep)
 	fc_exch_release(ep);	/* drop hold for exch in mp */
 }
 
-/*
- * Internal version of fc_exch_timer_set - used with lock held.
+/**
+ * fc_exch_timer_set_locked() - Start a timer for an exchange w/ the
+ *				the exchange lock held
+ * @ep:		The exchange whose timer will start
+ * @timer_msec: The timeout period
+ *
+ * Used for upper level protocols to time out the exchange.
+ * The timer is cancelled when it fires or when the exchange completes.
  */
 static inline void fc_exch_timer_set_locked(struct fc_exch *ep,
 					    unsigned int timer_msec)
@@ -359,12 +434,10 @@ static inline void fc_exch_timer_set_locked(struct fc_exch *ep,
 		fc_exch_hold(ep);		/* hold for timer */
 }
 
-/*
- * Set timer for an exchange.
- * The time is a minimum delay in milliseconds until the timer fires.
- * Used for upper level protocols to time out the exchange.
- * The timer is cancelled when it fires or when the exchange completes.
- * Returns non-zero if a timer couldn't be allocated.
+/**
+ * fc_exch_timer_set() - Lock the exchange and set the timer
+ * @ep:		The exchange whose timer will start
+ * @timer_msec: The timeout period
  */
 static void fc_exch_timer_set(struct fc_exch *ep, unsigned int timer_msec)
 {
@@ -374,15 +447,18 @@ static void fc_exch_timer_set(struct fc_exch *ep, unsigned int timer_msec)
 }
 
 /**
- * send a frame using existing sequence and exchange.
+ * fc_seq_send() - Send a frame using existing sequence/exchange pair
+ * @lport: The local port that the exchange will be sent on
+ * @sp:	   The sequence to be sent
+ * @fp:	   The frame to be sent on the exchange
  */
-static int fc_seq_send(struct fc_lport *lp, struct fc_seq *sp,
+static int fc_seq_send(struct fc_lport *lport, struct fc_seq *sp,
 		       struct fc_frame *fp)
 {
 	struct fc_exch *ep;
 	struct fc_frame_header *fh = fc_frame_header_get(fp);
 	int error;
-	u32	f_ctl;
+	u32 f_ctl;
 
 	ep = fc_seq_exch(sp);
 	WARN_ON((ep->esb_stat & ESB_ST_SEQ_INIT) != ESB_ST_SEQ_INIT);
@@ -404,7 +480,7 @@ static int fc_seq_send(struct fc_lport *lp, struct fc_seq *sp,
 	/*
 	 * Send the frame.
 	 */
-	error = lp->tt.frame_send(lp, fp);
+	error = lport->tt.frame_send(lport, fp);
 
 	/*
 	 * Update the exchange and sequence flags,
@@ -420,9 +496,9 @@ static int fc_seq_send(struct fc_lport *lp, struct fc_seq *sp,
 }
 
 /**
- * fc_seq_alloc() - Allocate a sequence.
- * @ep: Exchange pointer
- * @seq_id: Sequence ID to allocate a sequence for
+ * fc_seq_alloc() - Allocate a sequence for a given exchange
+ * @ep:	    The exchange to allocate a new sequence for
+ * @seq_id: The sequence ID to be used
  *
  * We don't support multiple originated sequences on the same exchange.
  * By implication, any previously originated sequence on this exchange
@@ -439,6 +515,11 @@ static struct fc_seq *fc_seq_alloc(struct fc_exch *ep, u8 seq_id)
 	return sp;
 }
 
+/**
+ * fc_seq_start_next_locked() - Allocate a new sequence on the same
+ *				exchange as the supplied sequence
+ * @sp: The sequence/exchange to get a new sequence for
+ */
 static struct fc_seq *fc_seq_start_next_locked(struct fc_seq *sp)
 {
 	struct fc_exch *ep = fc_seq_exch(sp);
@@ -450,8 +531,9 @@ static struct fc_seq *fc_seq_start_next_locked(struct fc_seq *sp)
 }
 
 /**
- * Allocate a new sequence on the same exchange as the supplied sequence.
- * This will never return NULL.
+ * fc_seq_start_next() - Lock the exchange and get a new sequence
+ *			 for a given sequence/exchange pair
+ * @sp: The sequence/exchange to get a new exchange for
  */
 static struct fc_seq *fc_seq_start_next(struct fc_seq *sp)
 {
@@ -465,9 +547,11 @@ static struct fc_seq *fc_seq_start_next(struct fc_seq *sp)
 }
 
 /**
- * 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.
+ * fc_seq_exch_abort() - Abort an exchange and sequence
+ * @req_sp:	The sequence to be aborted
+ * @timer_msec: The period of time to wait before aborting
+ *
+ * Generally called because of a timeout or an abort from the upper layer.
  */
 static int fc_seq_exch_abort(const struct fc_seq *req_sp,
 			     unsigned int timer_msec)
@@ -520,9 +604,9 @@ static int fc_seq_exch_abort(const struct fc_seq *req_sp,
 	return error;
 }
 
-/*
- * Exchange timeout - handle exchange timer expiration.
- * The timer will have been cancelled before this is called.
+/**
+ * fc_exch_timeout() - Handle exchange timer expiration
+ * @work: The work_struct identifying the exchange that timed out
  */
 static void fc_exch_timeout(struct work_struct *work)
 {
@@ -571,9 +655,9 @@ done:
 }
 
 /**
- * fc_exch_em_alloc() - allocate an exchange from a specified EM.
- * @lport:	ptr to the local port
- * @mp:		ptr to the exchange manager
+ * fc_exch_em_alloc() - Allocate an exchange from a specified EM.
+ * @lport: The local port that the exchange is for
+ * @mp:	   The exchange manager that will allocate the exchange
  *
  * Returns pointer to allocated fc_exch with exch lock held.
  */
@@ -641,14 +725,15 @@ err:
 }
 
 /**
- * fc_exch_alloc() - allocate an exchange.
- * @lport:	ptr to the local port
- * @fp:		ptr to the FC frame
+ * fc_exch_alloc() - Allocate an exchange from an EM on a
+ *		     local port's list of EMs.
+ * @lport: The local port that will own the exchange
+ * @fp:	   The FC frame that the exchange will be for
  *
- * This function walks the list of the exchange manager(EM)
- * anchors to select a EM for new exchange allocation. The
- * EM is selected having either a NULL match function pointer
- * or call to match function returning true.
+ * This function walks the list of exchange manager(EM)
+ * anchors to select an EM for a new exchange allocation. The
+ * EM is selected when a NULL match function pointer is encountered
+ * or when a call to a match function returns true.
  */
 static struct fc_exch *fc_exch_alloc(struct fc_lport *lport,
 				     struct fc_frame *fp)
@@ -666,8 +751,10 @@ static struct fc_exch *fc_exch_alloc(struct fc_lport *lport,
 	return NULL;
 }
 
-/*
- * Lookup and hold an exchange.
+/**
+ * fc_exch_find() - Lookup and hold an exchange
+ * @mp:	 The exchange manager to lookup the exchange from
+ * @xid: The XID of the exchange to look up
  */
 static struct fc_exch *fc_exch_find(struct fc_exch_mgr *mp, u16 xid)
 {
@@ -690,8 +777,8 @@ static struct fc_exch *fc_exch_find(struct fc_exch_mgr *mp, u16 xid)
 
 /**
  * fc_exch_done() - Indicate that an exchange/sequence tuple is complete and
- *                  the memory allocated for the related objects may be freed.
- * @sp: Sequence pointer
+ *		    the memory allocated for the related objects may be freed.
+ * @sp: The sequence that has completed
  */
 static void fc_exch_done(struct fc_seq *sp)
 {
@@ -705,8 +792,12 @@ static void fc_exch_done(struct fc_seq *sp)
 		fc_exch_delete(ep);
 }
 
-/*
- * Allocate a new exchange as responder.
+/**
+ * fc_exch_resp() - Allocate a new exchange for a response frame
+ * @lport: The local port that the exchange was for
+ * @mp:	   The exchange manager to allocate the exchange from
+ * @fp:	   The response frame
+ *
  * Sets the responder ID in the frame header.
  */
 static struct fc_exch *fc_exch_resp(struct fc_lport *lport,
@@ -747,8 +838,13 @@ static struct fc_exch *fc_exch_resp(struct fc_lport *lport,
 	return ep;
 }
 
-/*
- * Find a sequence for receive where the other end is originating the sequence.
+/**
+ * fc_seq_lookup_recip() - Find a sequence where the other end
+ *			   originated the sequence
+ * @lport: The local port that the frame was sent to
+ * @mp:	   The Exchange Manager to lookup the exchange from
+ * @fp:	   The frame associated with the sequence we're looking for
+ *
  * If fc_pf_rjt_reason is FC_RJT_NONE then this function will have a hold
  * on the ep that should be released by the caller.
  */
@@ -854,10 +950,12 @@ rel:
 	return reject;
 }
 
-/*
- * Find the sequence for a frame being received.
- * We originated the sequence, so it should be found.
- * We may or may not have originated the exchange.
+/**
+ * fc_seq_lookup_orig() - Find a sequence where this end
+ *			  originated the sequence
+ * @mp:	   The Exchange Manager to lookup the exchange from
+ * @fp:	   The frame associated with the sequence we're looking for
+ *
  * Does not hold the sequence for the caller.
  */
 static struct fc_seq *fc_seq_lookup_orig(struct fc_exch_mgr *mp,
@@ -889,8 +987,12 @@ static struct fc_seq *fc_seq_lookup_orig(struct fc_exch_mgr *mp,
 	return sp;
 }
 
-/*
- * Set addresses for an exchange.
+/**
+ * fc_exch_set_addr() - Set the source and destination IDs for an exchange
+ * @ep:	     The exchange to set the addresses for
+ * @orig_id: The originator's ID
+ * @resp_id: The responder's ID
+ *
  * Note this must be done before the first sequence of the exchange is sent.
  */
 static void fc_exch_set_addr(struct fc_exch *ep,
@@ -907,11 +1009,11 @@ static void fc_exch_set_addr(struct fc_exch *ep,
 }
 
 /**
- * fc_seq_els_rsp_send() - Send ELS response using mainly infomation
- *                         in exchange and sequence in EM layer.
- * @sp: Sequence pointer
- * @els_cmd: ELS command
- * @els_data: ELS data
+ * fc_seq_els_rsp_send() - Send an ELS response using infomation from
+ *			   the existing sequence/exchange.
+ * @sp:	      The sequence/exchange to get information from
+ * @els_cmd:  The ELS command to be sent
+ * @els_data: The ELS data to be sent
  */
 static void fc_seq_els_rsp_send(struct fc_seq *sp, enum fc_els_cmd els_cmd,
 				struct fc_seq_els_data *els_data)
@@ -934,8 +1036,12 @@ static void fc_seq_els_rsp_send(struct fc_seq *sp, enum fc_els_cmd els_cmd,
 	}
 }
 
-/*
- * Send a sequence, which is also the last sequence in the exchange.
+/**
+ * fc_seq_send_last() - Send a sequence that is the last in the exchange
+ * @sp:	     The sequence that is to be sent
+ * @fp:	     The frame that will be sent on the sequence
+ * @rctl:    The R_CTL information to be sent
+ * @fh_type: The frame header type
  */
 static void fc_seq_send_last(struct fc_seq *sp, struct fc_frame *fp,
 			     enum fc_rctl rctl, enum fc_fh_type fh_type)
@@ -949,9 +1055,12 @@ static void fc_seq_send_last(struct fc_seq *sp, struct fc_frame *fp,
 	fc_seq_send(ep->lp, sp, fp);
 }
 
-/*
+/**
+ * fc_seq_send_ack() - Send an acknowledgement that we've received a frame
+ * @sp:	   The sequence to send the ACK on
+ * @rx_fp: The received frame that is being acknoledged
+ *
  * Send ACK_1 (or equiv.) indicating we received something.
- * The frame we're acking is supplied.
  */
 static void fc_seq_send_ack(struct fc_seq *sp, const struct fc_frame *rx_fp)
 {
@@ -959,14 +1068,14 @@ static void fc_seq_send_ack(struct fc_seq *sp, const struct fc_frame *rx_fp)
 	struct fc_frame_header *rx_fh;
 	struct fc_frame_header *fh;
 	struct fc_exch *ep = fc_seq_exch(sp);
-	struct fc_lport *lp = ep->lp;
+	struct fc_lport *lport = ep->lp;
 	unsigned int f_ctl;
 
 	/*
 	 * Don't send ACKs for class 3.
 	 */
 	if (fc_sof_needs_ack(fr_sof(rx_fp))) {
-		fp = fc_frame_alloc(lp, 0);
+		fp = fc_frame_alloc(lport, 0);
 		if (!fp)
 			return;
 
@@ -1001,12 +1110,16 @@ static void fc_seq_send_ack(struct fc_seq *sp, const struct fc_frame *rx_fp)
 		else
 			fr_eof(fp) = FC_EOF_N;
 
-		(void) lp->tt.frame_send(lp, fp);
+		lport->tt.frame_send(lport, fp);
 	}
 }
 
-/*
- * Send BLS Reject.
+/**
+ * fc_exch_send_ba_rjt() - Send BLS Reject
+ * @rx_fp:  The frame being rejected
+ * @reason: The reason the frame is being rejected
+ * @explan: The explaination for the rejection
+ *
  * This is for rejecting BA_ABTS only.
  */
 static void fc_exch_send_ba_rjt(struct fc_frame *rx_fp,
@@ -1017,11 +1130,11 @@ static void fc_exch_send_ba_rjt(struct fc_frame *rx_fp,
 	struct fc_frame_header *rx_fh;
 	struct fc_frame_header *fh;
 	struct fc_ba_rjt *rp;
-	struct fc_lport *lp;
+	struct fc_lport *lport;
 	unsigned int f_ctl;
 
-	lp = fr_dev(rx_fp);
-	fp = fc_frame_alloc(lp, sizeof(*rp));
+	lport = fr_dev(rx_fp);
+	fp = fc_frame_alloc(lport, sizeof(*rp));
 	if (!fp)
 		return;
 	fh = fc_frame_header_get(fp);
@@ -1066,13 +1179,17 @@ static void fc_exch_send_ba_rjt(struct fc_frame *rx_fp,
 	if (fc_sof_needs_ack(fr_sof(fp)))
 		fr_eof(fp) = FC_EOF_N;
 
-	(void) lp->tt.frame_send(lp, fp);
+	lport->tt.frame_send(lport, fp);
 }
 
-/*
- * Handle an incoming ABTS.  This would be for target mode usually,
- * but could be due to lost FCP transfer ready, confirm or RRQ.
- * We always handle this as an exchange abort, ignoring the parameter.
+/**
+ * fc_exch_recv_abts() - Handle an incoming ABTS
+ * @ep:	   The exchange the abort was on
+ * @rx_fp: The ABTS frame
+ *
+ * This would be for target mode usually, but could be due to lost
+ * FCP transfer ready, confirm or RRQ. We always handle this as an
+ * exchange abort, ignoring the parameter.
  */
 static void fc_exch_recv_abts(struct fc_exch *ep, struct fc_frame *rx_fp)
 {
@@ -1121,10 +1238,14 @@ free:
 	fc_frame_free(rx_fp);
 }
 
-/*
- * Handle receive where the other end is originating the sequence.
+/**
+ * fc_exch_recv_req() - Handler for an incoming request where is other
+ *			end is originating the sequence
+ * @lport: The local port that received the request
+ * @mp:	   The EM that the exchange is on
+ * @fp:	   The request frame
  */
-static void fc_exch_recv_req(struct fc_lport *lp, struct fc_exch_mgr *mp,
+static void fc_exch_recv_req(struct fc_lport *lport, struct fc_exch_mgr *mp,
 			     struct fc_frame *fp)
 {
 	struct fc_frame_header *fh = fc_frame_header_get(fp);
@@ -1138,14 +1259,14 @@ static void fc_exch_recv_req(struct fc_lport *lp, struct fc_exch_mgr *mp,
 	/* We can have the wrong fc_lport at this point with NPIV, which is a
 	 * problem now that we know a new exchange needs to be allocated
 	 */
-	lp = fc_vport_id_lookup(lp, ntoh24(fh->fh_d_id));
-	if (!lp) {
+	lport = fc_vport_id_lookup(lport, ntoh24(fh->fh_d_id));
+	if (!lport) {
 		fc_frame_free(fp);
 		return;
 	}
 
 	fr_seq(fp) = NULL;
-	reject = fc_seq_lookup_recip(lp, mp, fp);
+	reject = fc_seq_lookup_recip(lport, mp, fp);
 	if (reject == FC_RJT_NONE) {
 		sp = fr_seq(fp);	/* sequence will be held */
 		ep = fc_seq_exch(sp);
@@ -1168,17 +1289,21 @@ static void fc_exch_recv_req(struct fc_lport *lp, struct fc_exch_mgr *mp,
 		if (ep->resp)
 			ep->resp(sp, fp, ep->arg);
 		else
-			lp->tt.lport_recv(lp, sp, fp);
+			lport->tt.lport_recv(lport, sp, fp);
 		fc_exch_release(ep);	/* release from lookup */
 	} else {
-		FC_LPORT_DBG(lp, "exch/seq lookup failed: reject %x\n", reject);
+		FC_LPORT_DBG(lport, "exch/seq lookup failed: reject %x\n",
+			     reject);
 		fc_frame_free(fp);
 	}
 }
 
-/*
- * Handle receive where the other end is originating the sequence in
- * response to our exchange.
+/**
+ * fc_exch_recv_seq_resp() - Handler for an incoming response where the other
+ *			     end is the originator of the sequence that is a
+ *			     response to our initial exchange
+ * @mp: The EM that the exchange is on
+ * @fp: The response frame
  */
 static void fc_exch_recv_seq_resp(struct fc_exch_mgr *mp, struct fc_frame *fp)
 {
@@ -1269,8 +1394,11 @@ out:
 	fc_frame_free(fp);
 }
 
-/*
- * Handle receive for a sequence where other end is responding to our sequence.
+/**
+ * fc_exch_recv_resp() - Handler for a sequence where other end is
+ *			 responding to our sequence
+ * @mp: The EM that the exchange is on
+ * @fp: The response frame
  */
 static void fc_exch_recv_resp(struct fc_exch_mgr *mp, struct fc_frame *fp)
 {
@@ -1286,9 +1414,13 @@ static void fc_exch_recv_resp(struct fc_exch_mgr *mp, struct fc_frame *fp)
 	fc_frame_free(fp);
 }
 
-/*
- * Handle the response to an ABTS for exchange or sequence.
- * This can be BA_ACC or BA_RJT.
+/**
+ * fc_exch_abts_resp() - Handler for a response to an ABT
+ * @ep: The exchange that the frame is on
+ * @fp: The response frame
+ *
+ * This response would be to an ABTS cancelling an exchange or sequence.
+ * The response can be either BA_ACC or BA_RJT
  */
 static void fc_exch_abts_resp(struct fc_exch *ep, struct fc_frame *fp)
 {
@@ -1363,9 +1495,12 @@ static void fc_exch_abts_resp(struct fc_exch *ep, struct fc_frame *fp)
 
 }
 
-/*
- * Receive BLS sequence.
- * This is always a sequence initiated by the remote side.
+/**
+ * fc_exch_recv_bls() - Handler for a BLS sequence
+ * @mp: The EM that the exchange is on
+ * @fp: The request frame
+ *
+ * The BLS frame is always a sequence initiated by the remote side.
  * We may be either the originator or recipient of the exchange.
  */
 static void fc_exch_recv_bls(struct fc_exch_mgr *mp, struct fc_frame *fp)
@@ -1422,8 +1557,10 @@ static void fc_exch_recv_bls(struct fc_exch_mgr *mp, struct fc_frame *fp)
 		fc_exch_release(ep);	/* release hold taken by fc_exch_find */
 }
 
-/*
- * Accept sequence with LS_ACC.
+/**
+ * fc_seq_ls_acc() - Accept sequence with LS_ACC
+ * @req_sp: The request sequence
+ *
  * If this fails due to allocation or transmit congestion, assume the
  * originator will repeat the sequence.
  */
@@ -1443,8 +1580,12 @@ static void fc_seq_ls_acc(struct fc_seq *req_sp)
 	}
 }
 
-/*
- * Reject sequence with ELS LS_RJT.
+/**
+ * fc_seq_ls_rjt() - Reject a sequence with ELS LS_RJT
+ * @req_sp: The request sequence
+ * @reason: The reason the sequence is being rejected
+ * @explan: The explaination for the rejection
+ *
  * If this fails due to allocation or transmit congestion, assume the
  * originator will repeat the sequence.
  */
@@ -1467,6 +1608,10 @@ static void fc_seq_ls_rjt(struct fc_seq *req_sp, enum fc_els_rjt_reason reason,
 	}
 }
 
+/**
+ * fc_exch_reset() - Reset an exchange
+ * @ep: The exchange to be reset
+ */
 static void fc_exch_reset(struct fc_exch *ep)
 {
 	struct fc_seq *sp;
@@ -1501,16 +1646,16 @@ static void fc_exch_reset(struct fc_exch *ep)
 }
 
 /**
- * fc_exch_pool_reset() - Resets an per cpu exches pool.
- * @lport:	ptr to the local port
- * @pool:	ptr to the per cpu exches pool
- * @sid:	source FC ID
- * @did:	destination FC ID
+ * fc_exch_pool_reset() - Reset a per cpu exchange pool
+ * @lport: The local port that the exchange pool is on
+ * @pool:  The exchange pool to be reset
+ * @sid:   The source ID
+ * @did:   The destination ID
  *
- * Resets an per cpu exches pool, releasing its all sequences
- * and exchanges. If sid is non-zero, then reset only exchanges
- * we sourced from that FID. If did is non-zero, reset only
- * exchanges destined to that FID.
+ * Resets a per cpu exches pool, releasing all of its sequences
+ * and exchanges. If sid is non-zero then reset only exchanges
+ * we sourced from the local port's FID. If did is non-zero then
+ * only reset exchanges destined for the local port's FID.
  */
 static void fc_exch_pool_reset(struct fc_lport *lport,
 			       struct fc_exch_pool *pool,
@@ -1544,15 +1689,15 @@ restart:
 }
 
 /**
- * fc_exch_mgr_reset() - Resets all EMs of a lport
- * @lport:	ptr to the local port
- * @sid:	source FC ID
- * @did:	destination FC ID
+ * fc_exch_mgr_reset() - Reset all EMs of a local port
+ * @lport: The local port whose EMs are to be reset
+ * @sid:   The source ID
+ * @did:   The destination ID
  *
- * Reset all EMs of a lport, releasing its all sequences and
- * exchanges. If sid is non-zero, then reset only exchanges
- * we sourced from that FID. If did is non-zero, reset only
- * exchanges destined to that FID.
+ * Reset all EMs associated with a given local port. Release all
+ * sequences and exchanges. If sid is non-zero then reset only the
+ * exchanges sent from the local port's FID. If did is non-zero then
+ * reset only exchanges destined for the local port's FID.
  */
 void fc_exch_mgr_reset(struct fc_lport *lport, u32 sid, u32 did)
 {
@@ -1568,8 +1713,11 @@ void fc_exch_mgr_reset(struct fc_lport *lport, u32 sid, u32 did)
 }
 EXPORT_SYMBOL(fc_exch_mgr_reset);
 
-/*
- * Handle incoming ELS REC - Read Exchange Concise.
+/**
+ * fc_exch_els_rec() - Handler for ELS REC (Read Exchange Concise) requests
+ * @sp:	 The sequence the REC is on
+ * @rfp: The REC frame
+ *
  * Note that the requesting port may be different than the S_ID in the request.
  */
 static void fc_exch_els_rec(struct fc_seq *sp, struct fc_frame *rfp)
@@ -1651,10 +1799,11 @@ reject:
 	fc_frame_free(rfp);
 }
 
-/*
- * Handle response from RRQ.
- * Not much to do here, really.
- * Should report errors.
+/**
+ * fc_exch_rrq_resp() - Handler for RRQ responses
+ * @sp:	 The sequence that the RRQ is on
+ * @fp:	 The RRQ frame
+ * @arg: The exchange that the RRQ is on
  *
  * TODO: fix error handler.
  */
@@ -1696,11 +1845,25 @@ cleanup:
 
 
 /**
- * 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.
+ * fc_exch_seq_send() - Send a frame using a new exchange and sequence
+ * @lport:	The local port to send the frame on
+ * @fp:		The frame to be sent
+ * @resp:	The response handler for this request
+ * @destructor: The destructor for the exchange
+ * @arg:	The argument to be passed to the response handler
+ * @timer_msec: The timeout period for the exchange
+ *
+ * The frame pointer with some of the header's fields must be
+ * filled before calling this routine, those fields are:
+ *
+ * - routing control
+ * - FC port did
+ * - FC port sid
+ * - FC header type
+ * - frame control
+ * - parameter or relative offset
  */
-static struct fc_seq *fc_exch_seq_send(struct fc_lport *lp,
+static struct fc_seq *fc_exch_seq_send(struct fc_lport *lport,
 				       struct fc_frame *fp,
 				       void (*resp)(struct fc_seq *,
 						    struct fc_frame *fp,
@@ -1714,7 +1877,7 @@ static struct fc_seq *fc_exch_seq_send(struct fc_lport *lp,
 	struct fc_frame_header *fh;
 	int rc = 1;
 
-	ep = fc_exch_alloc(lp, fp);
+	ep = fc_exch_alloc(lport, fp);
 	if (!ep) {
 		fc_frame_free(fp);
 		return NULL;
@@ -1726,7 +1889,7 @@ static struct fc_seq *fc_exch_seq_send(struct fc_lport *lp,
 	ep->destructor = destructor;
 	ep->arg = arg;
 	ep->r_a_tov = FC_DEF_R_A_TOV;
-	ep->lp = lp;
+	ep->lp = lport;
 	sp = &ep->seq;
 
 	ep->fh_type = fh->fh_type; /* save for possbile timeout handling */
@@ -1734,10 +1897,10 @@ static struct fc_seq *fc_exch_seq_send(struct fc_lport *lp,
 	fc_exch_setup_hdr(ep, fp, ep->f_ctl);
 	sp->cnt++;
 
-	if (ep->xid <= lp->lro_xid)
+	if (ep->xid <= lport->lro_xid)
 		fc_fcp_ddp_setup(fr_fsp(fp), ep->xid);
 
-	if (unlikely(lp->tt.frame_send(lp, fp)))
+	if (unlikely(lport->tt.frame_send(lport, fp)))
 		goto err;
 
 	if (timer_msec)
@@ -1756,21 +1919,23 @@ err:
 	return NULL;
 }
 
-/*
- * Send ELS RRQ - Reinstate Recovery Qualifier.
+/**
+ * fc_exch_rrq() - Send an ELS RRQ (Reinstate Recovery Qualifier) command
+ * @ep: The exchange to send the RRQ on
+ *
  * This tells the remote port to stop blocking the use of
  * the exchange and the seq_cnt range.
  */
 static void fc_exch_rrq(struct fc_exch *ep)
 {
-	struct fc_lport *lp;
+	struct fc_lport *lport;
 	struct fc_els_rrq *rrq;
 	struct fc_frame *fp;
 	u32 did;
 
-	lp = ep->lp;
+	lport = ep->lp;
 
-	fp = fc_frame_alloc(lp, sizeof(*rrq));
+	fp = fc_frame_alloc(lport, sizeof(*rrq));
 	if (!fp)
 		goto retry;
 
@@ -1786,10 +1951,11 @@ static void fc_exch_rrq(struct fc_exch *ep)
 		did = ep->sid;
 
 	fc_fill_fc_hdr(fp, FC_RCTL_ELS_REQ, did,
-		       fc_host_port_id(lp->host), FC_TYPE_ELS,
+		       fc_host_port_id(lport->host), FC_TYPE_ELS,
 		       FC_FC_FIRST_SEQ | FC_FC_END_SEQ | FC_FC_SEQ_INIT, 0);
 
-	if (fc_exch_seq_send(lp, fp, fc_exch_rrq_resp, NULL, ep, lp->e_d_tov))
+	if (fc_exch_seq_send(lport, fp, fc_exch_rrq_resp, NULL, ep,
+			     lport->e_d_tov))
 		return;
 
 retry:
@@ -1806,8 +1972,10 @@ retry:
 }
 
 
-/*
- * Handle incoming ELS RRQ - Reset Recovery Qualifier.
+/**
+ * fc_exch_els_rrq() - Handler for ELS RRQ (Reset Recovery Qualifier) requests
+ * @sp: The sequence that the RRQ is on
+ * @fp: The RRQ frame
  */
 static void fc_exch_els_rrq(struct fc_seq *sp, struct fc_frame *fp)
 {
@@ -1872,6 +2040,12 @@ reject:
 	fc_frame_free(fp);
 }
 
+/**
+ * fc_exch_mgr_add() - Add an exchange manager to a local port's list of EMs
+ * @lport: The local port to add the exchange manager to
+ * @mp:	   The exchange manager to be added to the local port
+ * @match: The match routine that indicates when this EM should be used
+ */
 struct fc_exch_mgr_anchor *fc_exch_mgr_add(struct fc_lport *lport,
 					   struct fc_exch_mgr *mp,
 					   bool (*match)(struct fc_frame *))
@@ -1891,6 +2065,10 @@ struct fc_exch_mgr_anchor *fc_exch_mgr_add(struct fc_lport *lport,
 }
 EXPORT_SYMBOL(fc_exch_mgr_add);
 
+/**
+ * fc_exch_mgr_destroy() - Destroy an exchange manager
+ * @kref: The reference to the EM to be destroyed
+ */
 static void fc_exch_mgr_destroy(struct kref *kref)
 {
 	struct fc_exch_mgr *mp = container_of(kref, struct fc_exch_mgr, kref);
@@ -1900,6 +2078,10 @@ static void fc_exch_mgr_destroy(struct kref *kref)
 	kfree(mp);
 }
 
+/**
+ * fc_exch_mgr_del() - Delete an EM from a local port's list
+ * @ema: The exchange manager anchor identifying the EM to be deleted
+ */
 void fc_exch_mgr_del(struct fc_exch_mgr_anchor *ema)
 {
 	/* remove EM anchor from EM anchors list */
@@ -1910,9 +2092,9 @@ void fc_exch_mgr_del(struct fc_exch_mgr_anchor *ema)
 EXPORT_SYMBOL(fc_exch_mgr_del);
 
 /**
- * fc_exch_mgr_list_clone() - share all exchange manager objects
- * @src: source lport to clone exchange managers from
- * @dst: new lport that takes references to all the exchange managers
+ * fc_exch_mgr_list_clone() - Share all exchange manager objects
+ * @src: Source lport to clone exchange managers from
+ * @dst: New lport that takes references to all the exchange managers
  */
 int fc_exch_mgr_list_clone(struct fc_lport *src, struct fc_lport *dst)
 {
@@ -1929,7 +2111,15 @@ err:
 	return -ENOMEM;
 }
 
-struct fc_exch_mgr *fc_exch_mgr_alloc(struct fc_lport *lp,
+/**
+ * fc_exch_mgr_alloc() - Allocate an exchange manager
+ * @lport:   The local port that the new EM will be associated with
+ * @class:   The default FC class for new exchanges
+ * @min_xid: The minimum XID for exchanges from the new EM
+ * @max_xid: The maximum XID for exchanges from the new EM
+ * @match:   The match routine for the new EM
+ */
+struct fc_exch_mgr *fc_exch_mgr_alloc(struct fc_lport *lport,
 				      enum fc_class class,
 				      u16 min_xid, u16 max_xid,
 				      bool (*match)(struct fc_frame *))
@@ -1942,7 +2132,7 @@ struct fc_exch_mgr *fc_exch_mgr_alloc(struct fc_lport *lp,
 
 	if (max_xid <= min_xid || max_xid == FC_XID_UNKNOWN ||
 	    (min_xid & fc_cpu_mask) != 0) {
-		FC_LPORT_DBG(lp, "Invalid min_xid 0x:%x and max_xid 0x:%x\n",
+		FC_LPORT_DBG(lport, "Invalid min_xid 0x:%x and max_xid 0x:%x\n",
 			     min_xid, max_xid);
 		return NULL;
 	}
@@ -1985,7 +2175,7 @@ struct fc_exch_mgr *fc_exch_mgr_alloc(struct fc_lport *lp,
 	}
 
 	kref_init(&mp->kref);
-	if (!fc_exch_mgr_add(lp, mp, match)) {
+	if (!fc_exch_mgr_add(lport, mp, match)) {
 		free_percpu(mp->pool);
 		goto free_mempool;
 	}
@@ -2006,6 +2196,10 @@ free_mp:
 }
 EXPORT_SYMBOL(fc_exch_mgr_alloc);
 
+/**
+ * fc_exch_mgr_free() - Free all exchange managers on a local port
+ * @lport: The local port whose EMs are to be freed
+ */
 void fc_exch_mgr_free(struct fc_lport *lport)
 {
 	struct fc_exch_mgr_anchor *ema, *next;
@@ -2015,10 +2209,12 @@ void fc_exch_mgr_free(struct fc_lport *lport)
 }
 EXPORT_SYMBOL(fc_exch_mgr_free);
 
-/*
- * Receive a frame
+/**
+ * fc_exch_recv() - Handler for received frames
+ * @lport: The local port the frame was received on
+ * @fp:	   The received frame
  */
-void fc_exch_recv(struct fc_lport *lp, struct fc_frame *fp)
+void fc_exch_recv(struct fc_lport *lport, struct fc_frame *fp)
 {
 	struct fc_frame_header *fh = fc_frame_header_get(fp);
 	struct fc_exch_mgr_anchor *ema;
@@ -2026,8 +2222,8 @@ void fc_exch_recv(struct fc_lport *lp, struct fc_frame *fp)
 	u16 oxid;
 
 	/* lport lock ? */
-	if (!lp || lp->state == LPORT_ST_DISABLED) {
-		FC_LPORT_DBG(lp, "Receiving frames for an lport that "
+	if (!lport || lport->state == LPORT_ST_DISABLED) {
+		FC_LPORT_DBG(lport, "Receiving frames for an lport that "
 			     "has not been initialized correctly\n");
 		fc_frame_free(fp);
 		return;
@@ -2036,7 +2232,7 @@ void fc_exch_recv(struct fc_lport *lp, struct fc_frame *fp)
 	f_ctl = ntoh24(fh->fh_f_ctl);
 	oxid = ntohs(fh->fh_ox_id);
 	if (f_ctl & FC_FC_EX_CTX) {
-		list_for_each_entry(ema, &lp->ema_list, ema_list) {
+		list_for_each_entry(ema, &lport->ema_list, ema_list) {
 			if ((oxid >= ema->mp->min_xid) &&
 			    (oxid <= ema->mp->max_xid)) {
 				found = 1;
@@ -2045,13 +2241,13 @@ void fc_exch_recv(struct fc_lport *lp, struct fc_frame *fp)
 		}
 
 		if (!found) {
-			FC_LPORT_DBG(lp, "Received response for out "
+			FC_LPORT_DBG(lport, "Received response for out "
 				     "of range oxid:%hx\n", oxid);
 			fc_frame_free(fp);
 			return;
 		}
 	} else
-		ema = list_entry(lp->ema_list.prev, typeof(*ema), ema_list);
+		ema = list_entry(lport->ema_list.prev, typeof(*ema), ema_list);
 
 	/*
 	 * If frame is marked invalid, just drop it.
@@ -2070,37 +2266,42 @@ void fc_exch_recv(struct fc_lport *lp, struct fc_frame *fp)
 		else if (f_ctl & FC_FC_SEQ_CTX)
 			fc_exch_recv_resp(ema->mp, fp);
 		else
-			fc_exch_recv_req(lp, ema->mp, fp);
+			fc_exch_recv_req(lport, ema->mp, fp);
 		break;
 	default:
-		FC_LPORT_DBG(lp, "dropping invalid frame (eof %x)", fr_eof(fp));
+		FC_LPORT_DBG(lport, "dropping invalid frame (eof %x)",
+			     fr_eof(fp));
 		fc_frame_free(fp);
 	}
 }
 EXPORT_SYMBOL(fc_exch_recv);
 
-int fc_exch_init(struct fc_lport *lp)
+/**
+ * fc_exch_init() - Initialize the exchange layer for a local port
+ * @lport: The local port to initialize the exchange layer for
+ */
+int fc_exch_init(struct fc_lport *lport)
 {
-	if (!lp->tt.seq_start_next)
-		lp->tt.seq_start_next = fc_seq_start_next;
+	if (!lport->tt.seq_start_next)
+		lport->tt.seq_start_next = fc_seq_start_next;
 
-	if (!lp->tt.exch_seq_send)
-		lp->tt.exch_seq_send = fc_exch_seq_send;
+	if (!lport->tt.exch_seq_send)
+		lport->tt.exch_seq_send = fc_exch_seq_send;
 
-	if (!lp->tt.seq_send)
-		lp->tt.seq_send = fc_seq_send;
+	if (!lport->tt.seq_send)
+		lport->tt.seq_send = fc_seq_send;
 
-	if (!lp->tt.seq_els_rsp_send)
-		lp->tt.seq_els_rsp_send = fc_seq_els_rsp_send;
+	if (!lport->tt.seq_els_rsp_send)
+		lport->tt.seq_els_rsp_send = fc_seq_els_rsp_send;
 
-	if (!lp->tt.exch_done)
-		lp->tt.exch_done = fc_exch_done;
+	if (!lport->tt.exch_done)
+		lport->tt.exch_done = fc_exch_done;
 
-	if (!lp->tt.exch_mgr_reset)
-		lp->tt.exch_mgr_reset = fc_exch_mgr_reset;
+	if (!lport->tt.exch_mgr_reset)
+		lport->tt.exch_mgr_reset = fc_exch_mgr_reset;
 
-	if (!lp->tt.seq_exch_abort)
-		lp->tt.seq_exch_abort = fc_seq_exch_abort;
+	if (!lport->tt.seq_exch_abort)
+		lport->tt.seq_exch_abort = fc_seq_exch_abort;
 
 	/*
 	 * Initialize fc_cpu_mask and fc_cpu_order. The
@@ -2128,7 +2329,10 @@ int fc_exch_init(struct fc_lport *lp)
 }
 EXPORT_SYMBOL(fc_exch_init);
 
-int fc_setup_exch_mgr(void)
+/**
+ * fc_setup_exch_mgr() - Setup an exchange manager
+ */
+int fc_setup_exch_mgr()
 {
 	fc_em_cachep = kmem_cache_create("libfc_em", sizeof(struct fc_exch),
 					 0, SLAB_HWCACHE_ALIGN, NULL);
@@ -2137,7 +2341,10 @@ int fc_setup_exch_mgr(void)
 	return 0;
 }
 
-void fc_destroy_exch_mgr(void)
+/**
+ * fc_destroy_exch_mgr() - Destroy an exchange manager
+ */
+void fc_destroy_exch_mgr()
 {
 	kmem_cache_destroy(fc_em_cachep);
 }
diff --git a/drivers/scsi/libfc/fc_fcp.c b/drivers/scsi/libfc/fc_fcp.c
index fb4b35d..7b916cd 100644
--- a/drivers/scsi/libfc/fc_fcp.c
+++ b/drivers/scsi/libfc/fc_fcp.c
@@ -67,10 +67,16 @@ struct kmem_cache *scsi_pkt_cachep;
 #define CMD_SCSI_STATUS(Cmnd)	    ((Cmnd)->SCp.Status)
 #define CMD_RESID_LEN(Cmnd)	    ((Cmnd)->SCp.buffers_residual)
 
+/**
+ * struct fc_fcp_internal - FCP layer internal data
+ * @scsi_pkt_pool:  Memory pool to draw FCP packets from
+ * @scsi_pkt_queue: Current FCP packets
+ * @throttled:	    The FCP packet queue is throttled
+ */
 struct fc_fcp_internal {
-	mempool_t	*scsi_pkt_pool;
+	mempool_t	 *scsi_pkt_pool;
 	struct list_head scsi_pkt_queue;
-	u8		throttled;
+	u8		 throttled;
 };
 
 #define fc_get_scsi_internal(x)	((struct fc_fcp_internal *)(x)->scsi_priv)
@@ -84,9 +90,9 @@ static void fc_fcp_recv(struct fc_seq *, struct fc_frame *, void *);
 static void fc_fcp_resp(struct fc_fcp_pkt *, struct fc_frame *);
 static void fc_fcp_complete_locked(struct fc_fcp_pkt *);
 static void fc_tm_done(struct fc_seq *, struct fc_frame *, void *);
-static void fc_fcp_error(struct fc_fcp_pkt *fsp, struct fc_frame *fp);
+static void fc_fcp_error(struct fc_fcp_pkt *, struct fc_frame *);
 static void fc_timeout_error(struct fc_fcp_pkt *);
-static void fc_fcp_timeout(unsigned long data);
+static void fc_fcp_timeout(unsigned long);
 static void fc_fcp_rec(struct fc_fcp_pkt *);
 static void fc_fcp_rec_error(struct fc_fcp_pkt *, struct fc_frame *);
 static void fc_fcp_rec_resp(struct fc_seq *, struct fc_frame *, void *);
@@ -125,23 +131,22 @@ static void fc_fcp_srr_error(struct fc_fcp_pkt *, struct fc_frame *);
 #define FC_FCP_DFLT_QUEUE_DEPTH 32
 
 /**
- * fc_fcp_pkt_alloc - allocation routine for scsi_pkt packet
- * @lp:		fc lport struct
- * @gfp:	gfp flags for allocation
+ * fc_fcp_pkt_alloc() - Allocate a fcp_pkt
+ * @lport: The local port that the FCP packet is for
+ * @gfp:   GFP flags for allocation
  *
- * This is used by upper layer scsi driver.
- * Return Value : scsi_pkt structure or null on allocation failure.
- * Context	: call from process context. no locking required.
+ * Return value: fcp_pkt structure or null on allocation failure.
+ * Context:	 Can be called from process context, no lock is required.
  */
-static struct fc_fcp_pkt *fc_fcp_pkt_alloc(struct fc_lport *lp, gfp_t gfp)
+static struct fc_fcp_pkt *fc_fcp_pkt_alloc(struct fc_lport *lport, gfp_t gfp)
 {
-	struct fc_fcp_internal *si = fc_get_scsi_internal(lp);
+	struct fc_fcp_internal *si = fc_get_scsi_internal(lport);
 	struct fc_fcp_pkt *fsp;
 
 	fsp = mempool_alloc(si->scsi_pkt_pool, gfp);
 	if (fsp) {
 		memset(fsp, 0, sizeof(*fsp));
-		fsp->lp = lp;
+		fsp->lp = lport;
 		atomic_set(&fsp->ref_cnt, 1);
 		init_timer(&fsp->timer);
 		INIT_LIST_HEAD(&fsp->list);
@@ -151,12 +156,11 @@ static struct fc_fcp_pkt *fc_fcp_pkt_alloc(struct fc_lport *lp, gfp_t gfp)
 }
 
 /**
- * fc_fcp_pkt_release() - release hold on scsi_pkt packet
- * @fsp:	fcp packet struct
+ * fc_fcp_pkt_release() - Release hold on a fcp_pkt
+ * @fsp: The FCP packet to be released
  *
- * This is used by upper layer scsi driver.
- * Context	: call from process  and interrupt context.
- *		  no locking required
+ * Context: Can be called from process or interrupt context,
+ *	    no lock is required.
  */
 static void fc_fcp_pkt_release(struct fc_fcp_pkt *fsp)
 {
@@ -167,20 +171,25 @@ static void fc_fcp_pkt_release(struct fc_fcp_pkt *fsp)
 	}
 }
 
+/**
+ * fc_fcp_pkt_hold() - Hold a fcp_pkt
+ * @fsp: The FCP packet to be held
+ */
 static void fc_fcp_pkt_hold(struct fc_fcp_pkt *fsp)
 {
 	atomic_inc(&fsp->ref_cnt);
 }
 
 /**
- * fc_fcp_pkt_destory() - release hold on scsi_pkt packet
- * @seq:		exchange sequence
- * @fsp:	fcp packet struct
+ * fc_fcp_pkt_destory() - Release hold on a fcp_pkt
+ * @seq: The sequence that the FCP packet is on (required by destructor API)
+ * @fsp: The FCP packet to be released
+ *
+ * This routine is called by a destructor callback in the exch_seq_send()
+ * routine of the libfc Transport Template. The 'struct fc_seq' is a required
+ * argument even though it is not used by this routine.
  *
- * Release hold on scsi_pkt packet set to keep scsi_pkt
- * till EM layer exch resource is not freed.
- * Context	: called from from EM layer.
- *		  no locking required
+ * Context: No locking required.
  */
 static void fc_fcp_pkt_destroy(struct fc_seq *seq, void *fsp)
 {
@@ -188,10 +197,10 @@ static void fc_fcp_pkt_destroy(struct fc_seq *seq, void *fsp)
 }
 
 /**
- * fc_fcp_lock_pkt() - lock a packet and get a ref to it.
- * @fsp:	fcp packet
+ * fc_fcp_lock_pkt() - Lock a fcp_pkt and increase its reference count
+ * @fsp: The FCP packet to be locked and incremented
  *
- * We should only return error if we return a command to scsi-ml before
+ * We should only return error if we return a command to SCSI-ml before
  * getting a response. This can happen in cases where we send a abort, but
  * do not wait for the response and the abort and command can be passing
  * each other on the wire/network-layer.
@@ -216,18 +225,33 @@ static inline int fc_fcp_lock_pkt(struct fc_fcp_pkt *fsp)
 	return 0;
 }
 
+/**
+ * fc_fcp_unlock_pkt() - Release a fcp_pkt's lock and decrement its
+ *			 reference count
+ * @fsp: The FCP packet to be unlocked and decremented
+ */
 static inline void fc_fcp_unlock_pkt(struct fc_fcp_pkt *fsp)
 {
 	spin_unlock_bh(&fsp->scsi_pkt_lock);
 	fc_fcp_pkt_release(fsp);
 }
 
+/**
+ * fc_fcp_timer_set() - Start a timer for a fcp_pkt
+ * @fsp:   The FCP packet to start a timer for
+ * @delay: The timeout period for the timer
+ */
 static void fc_fcp_timer_set(struct fc_fcp_pkt *fsp, unsigned long delay)
 {
 	if (!(fsp->state & FC_SRB_COMPL))
 		mod_timer(&fsp->timer, jiffies + delay);
 }
 
+/**
+ * fc_fcp_send_abort() - Send an abort for exchanges associated with a
+ *			 fcp_pkt
+ * @fsp: The FCP packet to abort exchanges on
+ */
 static int fc_fcp_send_abort(struct fc_fcp_pkt *fsp)
 {
 	if (!fsp->seq_ptr)
@@ -237,9 +261,14 @@ static int fc_fcp_send_abort(struct fc_fcp_pkt *fsp)
 	return fsp->lp->tt.seq_exch_abort(fsp->seq_ptr, 0);
 }
 
-/*
- * Retry command.
- * An abort isn't needed.
+/**
+ * fc_fcp_retry_cmd() - Retry a fcp_pkt
+ * @fsp: The FCP packet to be retried
+ *
+ * Sets the status code to be FC_ERROR and then calls
+ * fc_fcp_complete_locked() which in turn calls fc_io_compl().
+ * fc_io_compl() will notify the SCSI-ml that the I/O is done.
+ * The SCSI-ml will retry the command.
  */
 static void fc_fcp_retry_cmd(struct fc_fcp_pkt *fsp)
 {
@@ -254,43 +283,35 @@ static void fc_fcp_retry_cmd(struct fc_fcp_pkt *fsp)
 	fc_fcp_complete_locked(fsp);
 }
 
-/*
- * fc_fcp_ddp_setup - calls to LLD's ddp_setup to set up DDP
- * transfer for a read I/O indicated by the fc_fcp_pkt.
- * @fsp: ptr to the fc_fcp_pkt
- *
- * This is called in exch_seq_send() when we have a newly allocated
- * exchange with a valid exchange id to setup ddp.
- *
- * returns: none
+/**
+ * fc_fcp_ddp_setup() - Calls a LLD's ddp_setup routine to set up DDP context
+ * @fsp: The FCP packet that will manage the DDP frames
+ * @xid: The XID that will be used for the DDP exchange
  */
 void fc_fcp_ddp_setup(struct fc_fcp_pkt *fsp, u16 xid)
 {
-	struct fc_lport *lp;
+	struct fc_lport *lport;
 
 	if (!fsp)
 		return;
 
-	lp = fsp->lp;
+	lport = fsp->lp;
 	if ((fsp->req_flags & FC_SRB_READ) &&
-	    (lp->lro_enabled) && (lp->tt.ddp_setup)) {
-		if (lp->tt.ddp_setup(lp, xid, scsi_sglist(fsp->cmd),
-				     scsi_sg_count(fsp->cmd)))
+	    (lport->lro_enabled) && (lport->tt.ddp_setup)) {
+		if (lport->tt.ddp_setup(lport, xid, scsi_sglist(fsp->cmd),
+					scsi_sg_count(fsp->cmd)))
 			fsp->xfer_ddp = xid;
 	}
 }
 
-/*
- * fc_fcp_ddp_done - calls to LLD's ddp_done to release any
- * DDP related resources for this I/O if it is initialized
- * as a ddp transfer
- * @fsp: ptr to the fc_fcp_pkt
- *
- * returns: none
+/**
+ * fc_fcp_ddp_done() - Calls a LLD's ddp_done routine to release any
+ *		       DDP related resources for a fcp_pkt
+ * @fsp: The FCP packet that DDP had been used on
  */
 static void fc_fcp_ddp_done(struct fc_fcp_pkt *fsp)
 {
-	struct fc_lport *lp;
+	struct fc_lport *lport;
 
 	if (!fsp)
 		return;
@@ -298,22 +319,22 @@ static void fc_fcp_ddp_done(struct fc_fcp_pkt *fsp)
 	if (fsp->xfer_ddp == FC_XID_UNKNOWN)
 		return;
 
-	lp = fsp->lp;
-	if (lp->tt.ddp_done) {
-		fsp->xfer_len = lp->tt.ddp_done(lp, fsp->xfer_ddp);
+	lport = fsp->lp;
+	if (lport->tt.ddp_done) {
+		fsp->xfer_len = lport->tt.ddp_done(lport, fsp->xfer_ddp);
 		fsp->xfer_ddp = FC_XID_UNKNOWN;
 	}
 }
 
-
-/*
- * Receive SCSI data from target.
- * Called after receiving solicited data.
+/**
+ * fc_fcp_recv_data() - Handler for receiving SCSI-FCP data from a target
+ * @fsp: The FCP packet the data is on
+ * @fp:	 The data frame
  */
 static void fc_fcp_recv_data(struct fc_fcp_pkt *fsp, struct fc_frame *fp)
 {
 	struct scsi_cmnd *sc = fsp->cmd;
-	struct fc_lport *lp = fsp->lp;
+	struct fc_lport *lport = fsp->lp;
 	struct fcoe_dev_stats *stats;
 	struct fc_frame_header *fh;
 	size_t start_offset;
@@ -363,13 +384,13 @@ static void fc_fcp_recv_data(struct fc_fcp_pkt *fsp, struct fc_frame *fp)
 
 		if (~crc != le32_to_cpu(fr_crc(fp))) {
 crc_err:
-			stats = fc_lport_get_stats(lp);
+			stats = fc_lport_get_stats(lport);
 			stats->ErrorFrames++;
 			/* FIXME - per cpu count, not total count! */
 			if (stats->InvalidCRCCount++ < 5)
 				printk(KERN_WARNING "libfc: CRC error on data "
 				       "frame for port (%6x)\n",
-				       fc_host_port_id(lp->host));
+				       fc_host_port_id(lport->host));
 			/*
 			 * Assume the frame is total garbage.
 			 * We may have copied it over the good part
@@ -397,18 +418,17 @@ crc_err:
 }
 
 /**
- * fc_fcp_send_data() -  Send SCSI data to target.
- * @fsp: ptr to fc_fcp_pkt
- * @sp: ptr to this sequence
- * @offset: starting offset for this data request
- * @seq_blen: the burst length for this data request
+ * fc_fcp_send_data() - Send SCSI data to a target
+ * @fsp:      The FCP packet the data is on
+ * @sp:	      The sequence the data is to be sent on
+ * @offset:   The starting offset for this data request
+ * @seq_blen: The burst length for this data request
  *
  * Called after receiving a Transfer Ready data descriptor.
- * if LLD is capable of seq offload then send down seq_blen
- * size of data in single frame, otherwise send multiple FC
- * frames of max FC frame payload supported by target port.
- *
- * Returns : 0 for success.
+ * If the LLD is capable of sequence offload then send down the
+ * seq_blen ammount of data in single frame, otherwise send
+ * multiple frames of the maximum frame payload supported by
+ * the target port.
  */
 static int fc_fcp_send_data(struct fc_fcp_pkt *fsp, struct fc_seq *seq,
 			    size_t offset, size_t seq_blen)
@@ -417,7 +437,7 @@ static int fc_fcp_send_data(struct fc_fcp_pkt *fsp, struct fc_seq *seq,
 	struct scsi_cmnd *sc;
 	struct scatterlist *sg;
 	struct fc_frame *fp = NULL;
-	struct fc_lport *lp = fsp->lp;
+	struct fc_lport *lport = fsp->lp;
 	struct page *page;
 	size_t remaining;
 	size_t t_blen;
@@ -428,7 +448,7 @@ static int fc_fcp_send_data(struct fc_fcp_pkt *fsp, struct fc_seq *seq,
 	int error;
 	void *data = NULL;
 	void *page_addr;
-	int using_sg = lp->sg_supp;
+	int using_sg = lport->sg_supp;
 	u32 f_ctl;
 
 	WARN_ON(seq_blen <= 0);
@@ -450,10 +470,10 @@ static int fc_fcp_send_data(struct fc_fcp_pkt *fsp, struct fc_seq *seq,
 	 * to max FC frame payload previously set in fsp->max_payload.
 	 */
 	t_blen = fsp->max_payload;
-	if (lp->seq_offload) {
-		t_blen = min(seq_blen, (size_t)lp->lso_max);
+	if (lport->seq_offload) {
+		t_blen = min(seq_blen, (size_t)lport->lso_max);
 		FC_FCP_DBG(fsp, "fsp=%p:lso:blen=%zx lso_max=0x%x t_blen=%zx\n",
-			   fsp, seq_blen, lp->lso_max, t_blen);
+			   fsp, seq_blen, lport->lso_max, t_blen);
 	}
 
 	WARN_ON(t_blen < FC_MIN_MAX_PAYLOAD);
@@ -465,7 +485,7 @@ static int fc_fcp_send_data(struct fc_fcp_pkt *fsp, struct fc_seq *seq,
 	remaining = seq_blen;
 	fh_parm_offset = frame_offset = offset;
 	tlen = 0;
-	seq = lp->tt.seq_start_next(seq);
+	seq = lport->tt.seq_start_next(seq);
 	f_ctl = FC_FC_REL_OFF;
 	WARN_ON(!seq);
 
@@ -488,11 +508,11 @@ static int fc_fcp_send_data(struct fc_fcp_pkt *fsp, struct fc_seq *seq,
 			if (tlen % 4)
 				using_sg = 0;
 			if (using_sg) {
-				fp = _fc_frame_alloc(lp, 0);
+				fp = _fc_frame_alloc(lport, 0);
 				if (!fp)
 					return -ENOMEM;
 			} else {
-				fp = fc_frame_alloc(lp, tlen);
+				fp = fc_frame_alloc(lport, tlen);
 				if (!fp)
 					return -ENOMEM;
 
@@ -549,7 +569,7 @@ static int fc_fcp_send_data(struct fc_fcp_pkt *fsp, struct fc_seq *seq,
 		/*
 		 * send fragment using for a sequence.
 		 */
-		error = lp->tt.seq_send(lp, seq, fp);
+		error = lport->tt.seq_send(lport, seq, fp);
 		if (error) {
 			WARN_ON(1);		/* send error should be rare */
 			fc_fcp_retry_cmd(fsp);
@@ -561,6 +581,11 @@ static int fc_fcp_send_data(struct fc_fcp_pkt *fsp, struct fc_seq *seq,
 	return 0;
 }
 
+/**
+ * fc_fcp_abts_resp() - Send an ABTS response
+ * @fsp: The FCP packet that is being aborted
+ * @fp:	 The response frame
+ */
 static void fc_fcp_abts_resp(struct fc_fcp_pkt *fsp, struct fc_frame *fp)
 {
 	int ba_done = 1;
@@ -597,8 +622,8 @@ static void fc_fcp_abts_resp(struct fc_fcp_pkt *fsp, struct fc_frame *fp)
 }
 
 /**
- * fc_fcp_reduce_can_queue() - drop can_queue
- * @lp: lport to drop queueing for
+ * fc_fcp_reduce_can_queue() - Reduce the can_queue value for a local port
+ * @lport: The local port to reduce can_queue on
  *
  * If we are getting memory allocation failures, then we may
  * be trying to execute too many commands. We let the running
@@ -606,37 +631,36 @@ static void fc_fcp_abts_resp(struct fc_fcp_pkt *fsp, struct fc_frame *fp)
  * can_queue. Eventually we will hit the point where we run
  * on all reserved structs.
  */
-static void fc_fcp_reduce_can_queue(struct fc_lport *lp)
+static void fc_fcp_reduce_can_queue(struct fc_lport *lport)
 {
-	struct fc_fcp_internal *si = fc_get_scsi_internal(lp);
+	struct fc_fcp_internal *si = fc_get_scsi_internal(lport);
 	unsigned long flags;
 	int can_queue;
 
-	spin_lock_irqsave(lp->host->host_lock, flags);
+	spin_lock_irqsave(lport->host->host_lock, flags);
 	if (si->throttled)
 		goto done;
 	si->throttled = 1;
 
-	can_queue = lp->host->can_queue;
+	can_queue = lport->host->can_queue;
 	can_queue >>= 1;
 	if (!can_queue)
 		can_queue = 1;
-	lp->host->can_queue = can_queue;
-	shost_printk(KERN_ERR, lp->host, "libfc: Could not allocate frame.\n"
+	lport->host->can_queue = can_queue;
+	shost_printk(KERN_ERR, lport->host, "libfc: Could not allocate frame.\n"
 		     "Reducing can_queue to %d.\n", can_queue);
 done:
-	spin_unlock_irqrestore(lp->host->host_lock, flags);
+	spin_unlock_irqrestore(lport->host->host_lock, flags);
 }
 
 /**
- * fc_fcp_recv() - Reveive FCP frames
+ * fc_fcp_recv() - Reveive an FCP frame
  * @seq: The sequence the frame is on
- * @fp: The FC frame
+ * @fp:	 The received frame
  * @arg: The related FCP packet
  *
- * Return   : None
- * Context  : called from Soft IRQ context
- *	      can not called holding list lock
+ * Context: Called from Soft IRQ context. Can not be called
+ *	    holding the FCP packet list lock.
  */
 static void fc_fcp_recv(struct fc_seq *seq, struct fc_frame *fp, void *arg)
 {
@@ -709,6 +733,11 @@ errout:
 		fc_fcp_reduce_can_queue(lport);
 }
 
+/**
+ * fc_fcp_resp() - Handler for FCP responses
+ * @fsp: The FCP packet the response is for
+ * @fp:	 The response frame
+ */
 static void fc_fcp_resp(struct fc_fcp_pkt *fsp, struct fc_frame *fp)
 {
 	struct fc_frame_header *fh;
@@ -822,15 +851,16 @@ err:
 }
 
 /**
- * fc_fcp_complete_locked() - complete processing of a fcp packet
- * @fsp:	fcp packet
+ * fc_fcp_complete_locked() - Complete processing of a fcp_pkt with the
+ *			      fcp_pkt lock held
+ * @fsp: The FCP packet to be completed
  *
  * This function may sleep if a timer is pending. The packet lock must be
  * held, and the host lock must not be held.
  */
 static void fc_fcp_complete_locked(struct fc_fcp_pkt *fsp)
 {
-	struct fc_lport *lp = fsp->lp;
+	struct fc_lport *lport = fsp->lp;
 	struct fc_seq *seq;
 	struct fc_exch *ep;
 	u32 f_ctl;
@@ -861,7 +891,7 @@ static void fc_fcp_complete_locked(struct fc_fcp_pkt *fsp)
 			struct fc_frame *conf_frame;
 			struct fc_seq *csp;
 
-			csp = lp->tt.seq_start_next(seq);
+			csp = lport->tt.seq_start_next(seq);
 			conf_frame = fc_frame_alloc(fsp->lp, 0);
 			if (conf_frame) {
 				f_ctl = FC_FC_SEQ_INIT;
@@ -870,43 +900,48 @@ static void fc_fcp_complete_locked(struct fc_fcp_pkt *fsp)
 				fc_fill_fc_hdr(conf_frame, FC_RCTL_DD_SOL_CTL,
 					       ep->did, ep->sid,
 					       FC_TYPE_FCP, f_ctl, 0);
-				lp->tt.seq_send(lp, csp, conf_frame);
+				lport->tt.seq_send(lport, csp, conf_frame);
 			}
 		}
-		lp->tt.exch_done(seq);
+		lport->tt.exch_done(seq);
 	}
 	fc_io_compl(fsp);
 }
 
+/**
+ * fc_fcp_cleanup_cmd() - Cancel the active exchange on a fcp_pkt
+ * @fsp:   The FCP packet whose exchanges should be canceled
+ * @error: The reason for the cancellation
+ */
 static void fc_fcp_cleanup_cmd(struct fc_fcp_pkt *fsp, int error)
 {
-	struct fc_lport *lp = fsp->lp;
+	struct fc_lport *lport = fsp->lp;
 
 	if (fsp->seq_ptr) {
-		lp->tt.exch_done(fsp->seq_ptr);
+		lport->tt.exch_done(fsp->seq_ptr);
 		fsp->seq_ptr = NULL;
 	}
 	fsp->status_code = error;
 }
 
 /**
- * fc_fcp_cleanup_each_cmd() - Cleanup active commads
- * @lp:		logical port
- * @id:		target id
- * @lun:	lun
- * @error:	fsp status code
+ * fc_fcp_cleanup_each_cmd() - Cancel all exchanges on a local port
+ * @lport: The local port whose exchanges should be canceled
+ * @id:	   The target's ID
+ * @lun:   The LUN
+ * @error: The reason for cancellation
  *
  * If lun or id is -1, they are ignored.
  */
-static void fc_fcp_cleanup_each_cmd(struct fc_lport *lp, unsigned int id,
+static void fc_fcp_cleanup_each_cmd(struct fc_lport *lport, unsigned int id,
 				    unsigned int lun, int error)
 {
-	struct fc_fcp_internal *si = fc_get_scsi_internal(lp);
+	struct fc_fcp_internal *si = fc_get_scsi_internal(lport);
 	struct fc_fcp_pkt *fsp;
 	struct scsi_cmnd *sc_cmd;
 	unsigned long flags;
 
-	spin_lock_irqsave(lp->host->host_lock, flags);
+	spin_lock_irqsave(lport->host->host_lock, flags);
 restart:
 	list_for_each_entry(fsp, &si->scsi_pkt_queue, list) {
 		sc_cmd = fsp->cmd;
@@ -917,7 +952,7 @@ restart:
 			continue;
 
 		fc_fcp_pkt_hold(fsp);
-		spin_unlock_irqrestore(lp->host->host_lock, flags);
+		spin_unlock_irqrestore(lport->host->host_lock, flags);
 
 		if (!fc_fcp_lock_pkt(fsp)) {
 			fc_fcp_cleanup_cmd(fsp, error);
@@ -926,35 +961,36 @@ restart:
 		}
 
 		fc_fcp_pkt_release(fsp);
-		spin_lock_irqsave(lp->host->host_lock, flags);
+		spin_lock_irqsave(lport->host->host_lock, flags);
 		/*
 		 * while we dropped the lock multiple pkts could
 		 * have been released, so we have to start over.
 		 */
 		goto restart;
 	}
-	spin_unlock_irqrestore(lp->host->host_lock, flags);
+	spin_unlock_irqrestore(lport->host->host_lock, flags);
 }
 
-static void fc_fcp_abort_io(struct fc_lport *lp)
+/**
+ * fc_fcp_abort_io() - Abort all FCP-SCSI exchanges on a local port
+ * @lport: The local port whose exchanges are to be aborted
+ */
+static void fc_fcp_abort_io(struct fc_lport *lport)
 {
-	fc_fcp_cleanup_each_cmd(lp, -1, -1, FC_HRD_ERROR);
+	fc_fcp_cleanup_each_cmd(lport, -1, -1, FC_HRD_ERROR);
 }
 
 /**
- * fc_fcp_pkt_send() - send a fcp packet to the lower level.
- * @lp:		fc lport
- * @fsp:	fc packet.
+ * fc_fcp_pkt_send() - Send a fcp_pkt
+ * @lport: The local port to send the FCP packet on
+ * @fsp:   The FCP packet to send
  *
- * This is called by upper layer protocol.
- * Return   : zero for success and -1 for failure
- * Context  : called from queuecommand which can be called from process
- *	      or scsi soft irq.
- * Locks    : called with the host lock and irqs disabled.
+ * Return:  Zero for success and -1 for failure
+ * Locks:   Called with the host lock and irqs disabled.
  */
-static int fc_fcp_pkt_send(struct fc_lport *lp, struct fc_fcp_pkt *fsp)
+static int fc_fcp_pkt_send(struct fc_lport *lport, struct fc_fcp_pkt *fsp)
 {
-	struct fc_fcp_internal *si = fc_get_scsi_internal(lp);
+	struct fc_fcp_internal *si = fc_get_scsi_internal(lport);
 	int rc;
 
 	fsp->cmd->SCp.ptr = (char *)fsp;
@@ -966,16 +1002,22 @@ static int fc_fcp_pkt_send(struct fc_lport *lp, struct fc_fcp_pkt *fsp)
 	memcpy(fsp->cdb_cmd.fc_cdb, fsp->cmd->cmnd, fsp->cmd->cmd_len);
 	list_add_tail(&fsp->list, &si->scsi_pkt_queue);
 
-	spin_unlock_irq(lp->host->host_lock);
-	rc = lp->tt.fcp_cmd_send(lp, fsp, fc_fcp_recv);
-	spin_lock_irq(lp->host->host_lock);
+	spin_unlock_irq(lport->host->host_lock);
+	rc = lport->tt.fcp_cmd_send(lport, fsp, fc_fcp_recv);
+	spin_lock_irq(lport->host->host_lock);
 	if (rc)
 		list_del(&fsp->list);
 
 	return rc;
 }
 
-static int fc_fcp_cmd_send(struct fc_lport *lp, struct fc_fcp_pkt *fsp,
+/**
+ * fc_fcp_cmd_send() - Send a FCP command
+ * @lport: The local port to send the command on
+ * @fsp:   The FCP packet the command is on
+ * @resp:  The handler for the response
+ */
+static int fc_fcp_cmd_send(struct fc_lport *lport, struct fc_fcp_pkt *fsp,
 			   void (*resp)(struct fc_seq *,
 					struct fc_frame *fp,
 					void *arg))
@@ -983,14 +1025,14 @@ static int fc_fcp_cmd_send(struct fc_lport *lp, struct fc_fcp_pkt *fsp,
 	struct fc_frame *fp;
 	struct fc_seq *seq;
 	struct fc_rport *rport;
-	struct fc_rport_libfc_priv *rp;
+	struct fc_rport_libfc_priv *rpriv;
 	const size_t len = sizeof(fsp->cdb_cmd);
 	int rc = 0;
 
 	if (fc_fcp_lock_pkt(fsp))
 		return 0;
 
-	fp = fc_frame_alloc(lp, sizeof(fsp->cdb_cmd));
+	fp = fc_frame_alloc(lport, sizeof(fsp->cdb_cmd));
 	if (!fp) {
 		rc = -1;
 		goto unlock;
@@ -1000,13 +1042,14 @@ static int fc_fcp_cmd_send(struct fc_lport *lp, struct fc_fcp_pkt *fsp,
 	fr_fsp(fp) = fsp;
 	rport = fsp->rport;
 	fsp->max_payload = rport->maxframe_size;
-	rp = rport->dd_data;
+	rpriv = rport->dd_data;
 
 	fc_fill_fc_hdr(fp, FC_RCTL_DD_UNSOL_CMD, rport->port_id,
-		       fc_host_port_id(rp->local_port->host), FC_TYPE_FCP,
+		       fc_host_port_id(rpriv->local_port->host), FC_TYPE_FCP,
 		       FC_FC_FIRST_SEQ | FC_FC_END_SEQ | FC_FC_SEQ_INIT, 0);
 
-	seq = lp->tt.exch_seq_send(lp, fp, resp, fc_fcp_pkt_destroy, fsp, 0);
+	seq = lport->tt.exch_seq_send(lport, fp, resp, fc_fcp_pkt_destroy,
+				      fsp, 0);
 	if (!seq) {
 		fc_frame_free(fp);
 		rc = -1;
@@ -1025,8 +1068,10 @@ unlock:
 	return rc;
 }
 
-/*
- * transport error handler
+/**
+ * fc_fcp_error() - Handler for FCP layer errors
+ * @fsp: The FCP packet the error is on
+ * @fp:	 The frame that has errored
  */
 static void fc_fcp_error(struct fc_fcp_pkt *fsp, struct fc_frame *fp)
 {
@@ -1051,9 +1096,11 @@ unlock:
 	fc_fcp_unlock_pkt(fsp);
 }
 
-/*
- * Scsi abort handler- calls to send an abort
- * and then wait for abort completion
+/**
+ * fc_fcp_pkt_abort() - Abort a fcp_pkt
+ * @fsp:   The FCP packet to abort on
+ *
+ * Called to send an abort and then wait for abort completion
  */
 static int fc_fcp_pkt_abort(struct fc_fcp_pkt *fsp)
 {
@@ -1082,14 +1129,15 @@ static int fc_fcp_pkt_abort(struct fc_fcp_pkt *fsp)
 	return rc;
 }
 
-/*
- * Retry LUN reset after resource allocation failed.
+/**
+ * fc_lun_reset_send() - Send LUN reset command
+ * @data: The FCP packet that identifies the LUN to be reset
  */
 static void fc_lun_reset_send(unsigned long data)
 {
 	struct fc_fcp_pkt *fsp = (struct fc_fcp_pkt *)data;
-	struct fc_lport *lp = fsp->lp;
-	if (lp->tt.fcp_cmd_send(lp, fsp, fc_tm_done)) {
+	struct fc_lport *lport = fsp->lp;
+	if (lport->tt.fcp_cmd_send(lport, fsp, fc_tm_done)) {
 		if (fsp->recov_retry++ >= FC_MAX_RECOV_RETRY)
 			return;
 		if (fc_fcp_lock_pkt(fsp))
@@ -1100,11 +1148,15 @@ static void fc_lun_reset_send(unsigned long data)
 	}
 }
 
-/*
- * Scsi device reset handler- send a LUN RESET to the device
- * and wait for reset reply
+/**
+ * fc_lun_reset() - Send a LUN RESET command to a device
+ *		    and wait for the reply
+ * @lport: The local port to sent the comand on
+ * @fsp:   The FCP packet that identifies the LUN to be reset
+ * @id:	   The SCSI command ID
+ * @lun:   The LUN ID to be reset
  */
-static int fc_lun_reset(struct fc_lport *lp, struct fc_fcp_pkt *fsp,
+static int fc_lun_reset(struct fc_lport *lport, struct fc_fcp_pkt *fsp,
 			unsigned int id, unsigned int lun)
 {
 	int rc;
@@ -1132,14 +1184,14 @@ static int fc_lun_reset(struct fc_lport *lp, struct fc_fcp_pkt *fsp,
 
 	spin_lock_bh(&fsp->scsi_pkt_lock);
 	if (fsp->seq_ptr) {
-		lp->tt.exch_done(fsp->seq_ptr);
+		lport->tt.exch_done(fsp->seq_ptr);
 		fsp->seq_ptr = NULL;
 	}
 	fsp->wait_for_comp = 0;
 	spin_unlock_bh(&fsp->scsi_pkt_lock);
 
 	if (!rc) {
-		FC_SCSI_DBG(lp, "lun reset failed\n");
+		FC_SCSI_DBG(lport, "lun reset failed\n");
 		return FAILED;
 	}
 
@@ -1147,13 +1199,16 @@ static int fc_lun_reset(struct fc_lport *lp, struct fc_fcp_pkt *fsp,
 	if (fsp->cdb_status != FCP_TMF_CMPL)
 		return FAILED;
 
-	FC_SCSI_DBG(lp, "lun reset to lun %u completed\n", lun);
-	fc_fcp_cleanup_each_cmd(lp, id, lun, FC_CMD_ABORTED);
+	FC_SCSI_DBG(lport, "lun reset to lun %u completed\n", lun);
+	fc_fcp_cleanup_each_cmd(lport, id, lun, FC_CMD_ABORTED);
 	return SUCCESS;
 }
 
-/*
- * Task Managment response handler
+/**
+ * fc_tm_done() - Task Managment response handler
+ * @seq: The sequence that the response is on
+ * @fp:	 The response frame
+ * @arg: The FCP packet the response is for
  */
 static void fc_tm_done(struct fc_seq *seq, struct fc_frame *fp, void *arg)
 {
@@ -1190,34 +1245,31 @@ static void fc_tm_done(struct fc_seq *seq, struct fc_frame *fp, void *arg)
 	fc_fcp_unlock_pkt(fsp);
 }
 
-static void fc_fcp_cleanup(struct fc_lport *lp)
+/**
+ * fc_fcp_cleanup() - Cleanup all FCP exchanges on a local port
+ * @lport: The local port to be cleaned up
+ */
+static void fc_fcp_cleanup(struct fc_lport *lport)
 {
-	fc_fcp_cleanup_each_cmd(lp, -1, -1, FC_ERROR);
+	fc_fcp_cleanup_each_cmd(lport, -1, -1, FC_ERROR);
 }
 
-/*
- * fc_fcp_timeout: called by OS timer function.
- *
- * The timer has been inactivated and must be reactivated if desired
- * using fc_fcp_timer_set().
- *
- * Algorithm:
- *
- * If REC is supported, just issue it, and return.  The REC exchange will
- * complete or time out, and recovery can continue at that point.
- *
- * Otherwise, if the response has been received without all the data,
- * it has been ER_TIMEOUT since the response was received.
+/**
+ * fc_fcp_timeout() - Handler for fcp_pkt timeouts
+ * @data: The FCP packet that has timed out
  *
- * If the response has not been received,
- * we see if data was received recently.  If it has been, we continue waiting,
- * otherwise, we abort the command.
+ * If REC is supported then just issue it and return. The REC exchange will
+ * complete or time out and recovery can continue at that point. Otherwise,
+ * if the response has been received without all the data it has been
+ * ER_TIMEOUT since the response was received. If the response has not been
+ * received we see if data was received recently. If it has been then we
+ * continue waiting, otherwise, we abort the command.
  */
 static void fc_fcp_timeout(unsigned long data)
 {
 	struct fc_fcp_pkt *fsp = (struct fc_fcp_pkt *)data;
 	struct fc_rport *rport = fsp->rport;
-	struct fc_rport_libfc_priv *rp = rport->dd_data;
+	struct fc_rport_libfc_priv *rpriv = rport->dd_data;
 
 	if (fc_fcp_lock_pkt(fsp))
 		return;
@@ -1227,7 +1279,7 @@ static void fc_fcp_timeout(unsigned long data)
 
 	fsp->state |= FC_SRB_FCP_PROCESSING_TMO;
 
-	if (rp->flags & FC_RP_FLAGS_REC_SUPPORTED)
+	if (rpriv->flags & FC_RP_FLAGS_REC_SUPPORTED)
 		fc_fcp_rec(fsp);
 	else if (time_after_eq(fsp->last_pkt_time + (FC_SCSI_ER_TIMEOUT / 2),
 			       jiffies))
@@ -1241,35 +1293,37 @@ unlock:
 	fc_fcp_unlock_pkt(fsp);
 }
 
-/*
- * Send a REC ELS request
+/**
+ * fc_fcp_rec() - Send a REC ELS request
+ * @fsp: The FCP packet to send the REC request on
  */
 static void fc_fcp_rec(struct fc_fcp_pkt *fsp)
 {
-	struct fc_lport *lp;
+	struct fc_lport *lport;
 	struct fc_frame *fp;
 	struct fc_rport *rport;
-	struct fc_rport_libfc_priv *rp;
+	struct fc_rport_libfc_priv *rpriv;
 
-	lp = fsp->lp;
+	lport = fsp->lp;
 	rport = fsp->rport;
-	rp = rport->dd_data;
-	if (!fsp->seq_ptr || rp->rp_state != RPORT_ST_READY) {
+	rpriv = rport->dd_data;
+	if (!fsp->seq_ptr || rpriv->rp_state != RPORT_ST_READY) {
 		fsp->status_code = FC_HRD_ERROR;
 		fsp->io_status = 0;
 		fc_fcp_complete_locked(fsp);
 		return;
 	}
-	fp = fc_frame_alloc(lp, sizeof(struct fc_els_rec));
+	fp = fc_frame_alloc(lport, sizeof(struct fc_els_rec));
 	if (!fp)
 		goto retry;
 
 	fr_seq(fp) = fsp->seq_ptr;
 	fc_fill_fc_hdr(fp, FC_RCTL_ELS_REQ, rport->port_id,
-		       fc_host_port_id(rp->local_port->host), FC_TYPE_ELS,
+		       fc_host_port_id(rpriv->local_port->host), FC_TYPE_ELS,
 		       FC_FC_FIRST_SEQ | FC_FC_END_SEQ | FC_FC_SEQ_INIT, 0);
-	if (lp->tt.elsct_send(lp, rport->port_id, fp, ELS_REC, fc_fcp_rec_resp,
-			      fsp, jiffies_to_msecs(FC_SCSI_REC_TOV))) {
+	if (lport->tt.elsct_send(lport, rport->port_id, fp, ELS_REC,
+				 fc_fcp_rec_resp, fsp,
+				 jiffies_to_msecs(FC_SCSI_REC_TOV))) {
 		fc_fcp_pkt_hold(fsp);		/* hold while REC outstanding */
 		return;
 	}
@@ -1281,12 +1335,16 @@ retry:
 		fc_timeout_error(fsp);
 }
 
-/*
- * Receive handler for REC ELS frame
- * if it is a reject then let the scsi layer to handle
- * the timeout. if it is a LS_ACC then if the io was not completed
- * then set the timeout and return otherwise complete the exchange
- * and tell the scsi layer to restart the I/O.
+/**
+ * fc_fcp_rec_resp() - Handler for REC ELS responses
+ * @seq: The sequence the response is on
+ * @fp:	 The response frame
+ * @arg: The FCP packet the response is on
+ *
+ * If the response is a reject then the scsi layer will handle
+ * the timeout. If the response is a LS_ACC then if the I/O was not completed
+ * set the timeout and return. If the I/O was completed then complete the
+ * exchange and tell the SCSI layer.
  */
 static void fc_fcp_rec_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg)
 {
@@ -1298,7 +1356,7 @@ static void fc_fcp_rec_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg)
 	u32 offset;
 	enum dma_data_direction data_dir;
 	enum fc_rctl r_ctl;
-	struct fc_rport_libfc_priv *rp;
+	struct fc_rport_libfc_priv *rpriv;
 
 	if (IS_ERR(fp)) {
 		fc_fcp_rec_error(fsp, fp);
@@ -1321,13 +1379,13 @@ static void fc_fcp_rec_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg)
 			/* fall through */
 		case ELS_RJT_UNSUP:
 			FC_FCP_DBG(fsp, "device does not support REC\n");
-			rp = fsp->rport->dd_data;
+			rpriv = fsp->rport->dd_data;
 			/*
 			 * if we do not spport RECs or got some bogus
 			 * reason then resetup timer so we check for
 			 * making progress.
 			 */
-			rp->flags &= ~FC_RP_FLAGS_REC_SUPPORTED;
+			rpriv->flags &= ~FC_RP_FLAGS_REC_SUPPORTED;
 			fc_fcp_timer_set(fsp, FC_SCSI_ER_TIMEOUT);
 			break;
 		case ELS_RJT_LOGIC:
@@ -1424,8 +1482,10 @@ out:
 	fc_frame_free(fp);
 }
 
-/*
- * Handle error response or timeout for REC exchange.
+/**
+ * fc_fcp_rec_error() - Handler for REC errors
+ * @fsp: The FCP packet the error is on
+ * @fp:	 The REC frame
  */
 static void fc_fcp_rec_error(struct fc_fcp_pkt *fsp, struct fc_frame *fp)
 {
@@ -1464,10 +1524,9 @@ out:
 	fc_fcp_pkt_release(fsp);	/* drop hold for outstanding REC */
 }
 
-/*
- * Time out error routine:
- * abort's the I/O close the exchange and
- * send completion notification to scsi layer
+/**
+ * fc_timeout_error() - Handler for fcp_pkt timeouts
+ * @fsp: The FCP packt that has timed out
  */
 static void fc_timeout_error(struct fc_fcp_pkt *fsp)
 {
@@ -1481,16 +1540,18 @@ static void fc_timeout_error(struct fc_fcp_pkt *fsp)
 	fc_fcp_send_abort(fsp);
 }
 
-/*
- * Sequence retransmission request.
+/**
+ * fc_fcp_srr() - Send a SRR request (Sequence Retransmission Request)
+ * @fsp:   The FCP packet the SRR is to be sent on
+ * @r_ctl: The R_CTL field for the SRR request
  * This is called after receiving status but insufficient data, or
  * when expecting status but the request has timed out.
  */
 static void fc_fcp_srr(struct fc_fcp_pkt *fsp, enum fc_rctl r_ctl, u32 offset)
 {
-	struct fc_lport *lp = fsp->lp;
+	struct fc_lport *lport = fsp->lp;
 	struct fc_rport *rport;
-	struct fc_rport_libfc_priv *rp;
+	struct fc_rport_libfc_priv *rpriv;
 	struct fc_exch *ep = fc_seq_exch(fsp->seq_ptr);
 	struct fc_seq *seq;
 	struct fcp_srr *srr;
@@ -1498,12 +1559,13 @@ static void fc_fcp_srr(struct fc_fcp_pkt *fsp, enum fc_rctl r_ctl, u32 offset)
 	u8 cdb_op;
 
 	rport = fsp->rport;
-	rp = rport->dd_data;
+	rpriv = rport->dd_data;
 	cdb_op = fsp->cdb_cmd.fc_cdb[0];
 
-	if (!(rp->flags & FC_RP_FLAGS_RETRY) || rp->rp_state != RPORT_ST_READY)
+	if (!(rpriv->flags & FC_RP_FLAGS_RETRY) ||
+	    rpriv->rp_state != RPORT_ST_READY)
 		goto retry;			/* shouldn't happen */
-	fp = fc_frame_alloc(lp, sizeof(*srr));
+	fp = fc_frame_alloc(lport, sizeof(*srr));
 	if (!fp)
 		goto retry;
 
@@ -1516,11 +1578,11 @@ static void fc_fcp_srr(struct fc_fcp_pkt *fsp, enum fc_rctl r_ctl, u32 offset)
 	srr->srr_rel_off = htonl(offset);
 
 	fc_fill_fc_hdr(fp, FC_RCTL_ELS4_REQ, rport->port_id,
-		       fc_host_port_id(rp->local_port->host), FC_TYPE_FCP,
+		       fc_host_port_id(rpriv->local_port->host), FC_TYPE_FCP,
 		       FC_FC_FIRST_SEQ | FC_FC_END_SEQ | FC_FC_SEQ_INIT, 0);
 
-	seq = lp->tt.exch_seq_send(lp, fp, fc_fcp_srr_resp, NULL,
-				   fsp, jiffies_to_msecs(FC_SCSI_REC_TOV));
+	seq = lport->tt.exch_seq_send(lport, fp, fc_fcp_srr_resp, NULL,
+				      fsp, jiffies_to_msecs(FC_SCSI_REC_TOV));
 	if (!seq) {
 		fc_frame_free(fp);
 		goto retry;
@@ -1535,8 +1597,11 @@ retry:
 	fc_fcp_retry_cmd(fsp);
 }
 
-/*
- * Handle response from SRR.
+/**
+ * fc_fcp_srr_resp() - Handler for SRR response
+ * @seq: The sequence the SRR is on
+ * @fp:	 The SRR frame
+ * @arg: The FCP packet the SRR is on
  */
 static void fc_fcp_srr_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg)
 {
@@ -1582,6 +1647,11 @@ out:
 	fc_fcp_pkt_release(fsp);	/* drop hold for outstanding SRR */
 }
 
+/**
+ * fc_fcp_srr_error() - Handler for SRR errors
+ * @fsp: The FCP packet that the SRR error is on
+ * @fp:	 The SRR frame
+ */
 static void fc_fcp_srr_error(struct fc_fcp_pkt *fsp, struct fc_frame *fp)
 {
 	if (fc_fcp_lock_pkt(fsp))
@@ -1606,31 +1676,36 @@ out:
 	fc_fcp_pkt_release(fsp);	/* drop hold for outstanding SRR */
 }
 
-static inline int fc_fcp_lport_queue_ready(struct fc_lport *lp)
+/**
+ * fc_fcp_lport_queue_ready() - Determine if the lport and it's queue is ready
+ * @lport: The local port to be checked
+ */
+static inline int fc_fcp_lport_queue_ready(struct fc_lport *lport)
 {
 	/* lock ? */
-	return (lp->state == LPORT_ST_READY) && lp->link_up && !lp->qfull;
+	return (lport->state == LPORT_ST_READY) &&
+		lport->link_up && !lport->qfull;
 }
 
 /**
- * fc_queuecommand - The queuecommand function of the scsi template
- * @cmd:	struct scsi_cmnd to be executed
- * @done:	Callback function to be called when cmd is completed
+ * fc_queuecommand() - The queuecommand function of the SCSI template
+ * @cmd:   The scsi_cmnd to be executed
+ * @done:  The callback function to be called when the scsi_cmnd is complete
  *
- * this is the i/o strategy routine, called by the scsi layer
- * this routine is called with holding the host_lock.
+ * This is the i/o strategy routine, called by the SCSI layer. This routine
+ * is called with the host_lock held.
  */
 int fc_queuecommand(struct scsi_cmnd *sc_cmd, void (*done)(struct scsi_cmnd *))
 {
-	struct fc_lport *lp;
+	struct fc_lport *lport;
 	struct fc_rport *rport = starget_to_rport(scsi_target(sc_cmd->device));
 	struct fc_fcp_pkt *fsp;
-	struct fc_rport_libfc_priv *rp;
+	struct fc_rport_libfc_priv *rpriv;
 	int rval;
 	int rc = 0;
 	struct fcoe_dev_stats *stats;
 
-	lp = shost_priv(sc_cmd->device->host);
+	lport = shost_priv(sc_cmd->device->host);
 
 	rval = fc_remote_port_chkready(rport);
 	if (rval) {
@@ -1649,14 +1724,14 @@ int fc_queuecommand(struct scsi_cmnd *sc_cmd, void (*done)(struct scsi_cmnd *))
 		goto out;
 	}
 
-	rp = rport->dd_data;
+	rpriv = rport->dd_data;
 
-	if (!fc_fcp_lport_queue_ready(lp)) {
+	if (!fc_fcp_lport_queue_ready(lport)) {
 		rc = SCSI_MLQUEUE_HOST_BUSY;
 		goto out;
 	}
 
-	fsp = fc_fcp_pkt_alloc(lp, GFP_ATOMIC);
+	fsp = fc_fcp_pkt_alloc(lport, GFP_ATOMIC);
 	if (fsp == NULL) {
 		rc = SCSI_MLQUEUE_HOST_BUSY;
 		goto out;
@@ -1666,7 +1741,7 @@ int fc_queuecommand(struct scsi_cmnd *sc_cmd, void (*done)(struct scsi_cmnd *))
 	 * build the libfc request pkt
 	 */
 	fsp->cmd = sc_cmd;	/* save the cmd */
-	fsp->lp = lp;		/* save the softc ptr */
+	fsp->lp = lport;	/* save the softc ptr */
 	fsp->rport = rport;	/* set the remote port ptr */
 	fsp->xfer_ddp = FC_XID_UNKNOWN;
 	sc_cmd->scsi_done = done;
@@ -1680,7 +1755,7 @@ int fc_queuecommand(struct scsi_cmnd *sc_cmd, void (*done)(struct scsi_cmnd *))
 	/*
 	 * setup the data direction
 	 */
-	stats = fc_lport_get_stats(lp);
+	stats = fc_lport_get_stats(lport);
 	if (sc_cmd->sc_data_direction == DMA_FROM_DEVICE) {
 		fsp->req_flags = FC_SRB_READ;
 		stats->InputRequests++;
@@ -1694,7 +1769,7 @@ int fc_queuecommand(struct scsi_cmnd *sc_cmd, void (*done)(struct scsi_cmnd *))
 		stats->ControlRequests++;
 	}
 
-	fsp->tgt_flags = rp->flags;
+	fsp->tgt_flags = rpriv->flags;
 
 	init_timer(&fsp->timer);
 	fsp->timer.data = (unsigned long)fsp;
@@ -1704,7 +1779,7 @@ int fc_queuecommand(struct scsi_cmnd *sc_cmd, void (*done)(struct scsi_cmnd *))
 	 * if we get -1 return then put the request in the pending
 	 * queue.
 	 */
-	rval = fc_fcp_pkt_send(lp, fsp);
+	rval = fc_fcp_pkt_send(lport, fsp);
 	if (rval != 0) {
 		fsp->state = FC_SRB_FREE;
 		fc_fcp_pkt_release(fsp);
@@ -1716,18 +1791,17 @@ out:
 EXPORT_SYMBOL(fc_queuecommand);
 
 /**
- * fc_io_compl() -  Handle responses for completed commands
- * @fsp:	scsi packet
- *
- * Translates a error to a Linux SCSI error.
+ * fc_io_compl() - Handle responses for completed commands
+ * @fsp: The FCP packet that is complete
  *
+ * Translates fcp_pkt errors to a Linux SCSI errors.
  * The fcp packet lock must be held when calling.
  */
 static void fc_io_compl(struct fc_fcp_pkt *fsp)
 {
 	struct fc_fcp_internal *si;
 	struct scsi_cmnd *sc_cmd;
-	struct fc_lport *lp;
+	struct fc_lport *lport;
 	unsigned long flags;
 
 	/* release outstanding ddp context */
@@ -1740,11 +1814,11 @@ static void fc_io_compl(struct fc_fcp_pkt *fsp)
 		spin_lock_bh(&fsp->scsi_pkt_lock);
 	}
 
-	lp = fsp->lp;
-	si = fc_get_scsi_internal(lp);
-	spin_lock_irqsave(lp->host->host_lock, flags);
+	lport = fsp->lp;
+	si = fc_get_scsi_internal(lport);
+	spin_lock_irqsave(lport->host->host_lock, flags);
 	if (!fsp->cmd) {
-		spin_unlock_irqrestore(lp->host->host_lock, flags);
+		spin_unlock_irqrestore(lport->host->host_lock, flags);
 		return;
 	}
 
@@ -1761,7 +1835,7 @@ static void fc_io_compl(struct fc_fcp_pkt *fsp)
 	fsp->cmd = NULL;
 
 	if (!sc_cmd->SCp.ptr) {
-		spin_unlock_irqrestore(lp->host->host_lock, flags);
+		spin_unlock_irqrestore(lport->host->host_lock, flags);
 		return;
 	}
 
@@ -1827,7 +1901,7 @@ static void fc_io_compl(struct fc_fcp_pkt *fsp)
 	list_del(&fsp->list);
 	sc_cmd->SCp.ptr = NULL;
 	sc_cmd->scsi_done(sc_cmd);
-	spin_unlock_irqrestore(lp->host->host_lock, flags);
+	spin_unlock_irqrestore(lport->host->host_lock, flags);
 
 	/* release ref from initial allocation in queue command */
 	fc_fcp_pkt_release(fsp);
@@ -1835,35 +1909,34 @@ static void fc_io_compl(struct fc_fcp_pkt *fsp)
 
 /**
  * fc_eh_abort() - Abort a command
- * @sc_cmd:	scsi command to abort
+ * @sc_cmd: The SCSI command to abort
  *
- * From scsi host template.
- * send ABTS to the target device  and wait for the response
- * sc_cmd is the pointer to the command to be aborted.
+ * From SCSI host template.
+ * Send an ABTS to the target device and wait for the response.
  */
 int fc_eh_abort(struct scsi_cmnd *sc_cmd)
 {
 	struct fc_fcp_pkt *fsp;
-	struct fc_lport *lp;
+	struct fc_lport *lport;
 	int rc = FAILED;
 	unsigned long flags;
 
-	lp = shost_priv(sc_cmd->device->host);
-	if (lp->state != LPORT_ST_READY)
+	lport = shost_priv(sc_cmd->device->host);
+	if (lport->state != LPORT_ST_READY)
 		return rc;
-	else if (!lp->link_up)
+	else if (!lport->link_up)
 		return rc;
 
-	spin_lock_irqsave(lp->host->host_lock, flags);
+	spin_lock_irqsave(lport->host->host_lock, flags);
 	fsp = CMD_SP(sc_cmd);
 	if (!fsp) {
 		/* command completed while scsi eh was setting up */
-		spin_unlock_irqrestore(lp->host->host_lock, flags);
+		spin_unlock_irqrestore(lport->host->host_lock, flags);
 		return SUCCESS;
 	}
 	/* grab a ref so the fsp and sc_cmd cannot be relased from under us */
 	fc_fcp_pkt_hold(fsp);
-	spin_unlock_irqrestore(lp->host->host_lock, flags);
+	spin_unlock_irqrestore(lport->host->host_lock, flags);
 
 	if (fc_fcp_lock_pkt(fsp)) {
 		/* completed while we were waiting for timer to be deleted */
@@ -1881,34 +1954,32 @@ release_pkt:
 EXPORT_SYMBOL(fc_eh_abort);
 
 /**
- * fc_eh_device_reset() Reset a single LUN
- * @sc_cmd:	scsi command
+ * fc_eh_device_reset() - Reset a single LUN
+ * @sc_cmd: The SCSI command which identifies the device whose
+ *	    LUN is to be reset
  *
- * Set from scsi host template to send tm cmd to the target and wait for the
- * response.
+ * Set from SCSI host template.
  */
 int fc_eh_device_reset(struct scsi_cmnd *sc_cmd)
 {
-	struct fc_lport *lp;
+	struct fc_lport *lport;
 	struct fc_fcp_pkt *fsp;
 	struct fc_rport *rport = starget_to_rport(scsi_target(sc_cmd->device));
 	int rc = FAILED;
-	struct fc_rport_libfc_priv *rp;
 	int rval;
 
 	rval = fc_remote_port_chkready(rport);
 	if (rval)
 		goto out;
 
-	rp = rport->dd_data;
-	lp = shost_priv(sc_cmd->device->host);
+	lport = shost_priv(sc_cmd->device->host);
 
-	if (lp->state != LPORT_ST_READY)
+	if (lport->state != LPORT_ST_READY)
 		return rc;
 
-	FC_SCSI_DBG(lp, "Resetting rport (%6x)\n", rport->port_id);
+	FC_SCSI_DBG(lport, "Resetting rport (%6x)\n", rport->port_id);
 
-	fsp = fc_fcp_pkt_alloc(lp, GFP_NOIO);
+	fsp = fc_fcp_pkt_alloc(lport, GFP_NOIO);
 	if (fsp == NULL) {
 		printk(KERN_WARNING "libfc: could not allocate scsi_pkt\n");
 		sc_cmd->result = DID_NO_CONNECT << 16;
@@ -1920,13 +1991,13 @@ int fc_eh_device_reset(struct scsi_cmnd *sc_cmd)
 	 * the sc passed in is not setup for execution like when sent
 	 * through the queuecommand callout.
 	 */
-	fsp->lp = lp;		/* save the softc ptr */
+	fsp->lp = lport;	/* save the softc ptr */
 	fsp->rport = rport;	/* set the remote port ptr */
 
 	/*
 	 * flush outstanding commands
 	 */
-	rc = fc_lun_reset(lp, fsp, scmd_id(sc_cmd), sc_cmd->device->lun);
+	rc = fc_lun_reset(lport, fsp, scmd_id(sc_cmd), sc_cmd->device->lun);
 	fsp->state = FC_SRB_FREE;
 	fc_fcp_pkt_release(fsp);
 
@@ -1936,38 +2007,39 @@ out:
 EXPORT_SYMBOL(fc_eh_device_reset);
 
 /**
- * fc_eh_host_reset() - The reset function will reset the ports on the host.
- * @sc_cmd:	scsi command
+ * fc_eh_host_reset() - Reset a Scsi_Host.
+ * @sc_cmd: The SCSI command that identifies the SCSI host to be reset
  */
 int fc_eh_host_reset(struct scsi_cmnd *sc_cmd)
 {
 	struct Scsi_Host *shost = sc_cmd->device->host;
-	struct fc_lport *lp = shost_priv(shost);
+	struct fc_lport *lport = shost_priv(shost);
 	unsigned long wait_tmo;
 
-	FC_SCSI_DBG(lp, "Resetting host\n");
+	FC_SCSI_DBG(lport, "Resetting host\n");
 
-	lp->tt.lport_reset(lp);
+	lport->tt.lport_reset(lport);
 	wait_tmo = jiffies + FC_HOST_RESET_TIMEOUT;
-	while (!fc_fcp_lport_queue_ready(lp) && time_before(jiffies, wait_tmo))
+	while (!fc_fcp_lport_queue_ready(lport) && time_before(jiffies,
+							       wait_tmo))
 		msleep(1000);
 
-	if (fc_fcp_lport_queue_ready(lp)) {
+	if (fc_fcp_lport_queue_ready(lport)) {
 		shost_printk(KERN_INFO, shost, "libfc: Host reset succeeded "
-			     "on port (%6x)\n", fc_host_port_id(lp->host));
+			     "on port (%6x)\n", fc_host_port_id(lport->host));
 		return SUCCESS;
 	} else {
 		shost_printk(KERN_INFO, shost, "libfc: Host reset failed, "
 			     "port (%6x) is not ready.\n",
-			     fc_host_port_id(lp->host));
+			     fc_host_port_id(lport->host));
 		return FAILED;
 	}
 }
 EXPORT_SYMBOL(fc_eh_host_reset);
 
 /**
- * fc_slave_alloc() - configure queue depth
- * @sdev:	scsi device
+ * fc_slave_alloc() - Configure the queue depth of a Scsi_Host
+ * @sdev: The SCSI device that identifies the SCSI host
  *
  * Configures queue depth based on host's cmd_per_len. If not set
  * then we use the libfc default.
@@ -1989,6 +2061,12 @@ int fc_slave_alloc(struct scsi_device *sdev)
 }
 EXPORT_SYMBOL(fc_slave_alloc);
 
+/**
+ * fc_change_queue_depth() - Change a device's queue depth
+ * @sdev:   The SCSI device whose queue depth is to change
+ * @qdepth: The new queue depth
+ * @reason: The reason for the change
+ */
 int fc_change_queue_depth(struct scsi_device *sdev, int qdepth, int reason)
 {
 	switch (reason) {
@@ -2010,6 +2088,11 @@ int fc_change_queue_depth(struct scsi_device *sdev, int qdepth, int reason)
 }
 EXPORT_SYMBOL(fc_change_queue_depth);
 
+/**
+ * fc_change_queue_type() - Change a device's queue type
+ * @sdev:     The SCSI device whose queue depth is to change
+ * @tag_type: Identifier for queue type
+ */
 int fc_change_queue_type(struct scsi_device *sdev, int tag_type)
 {
 	if (sdev->tagged_supported) {
@@ -2025,17 +2108,21 @@ int fc_change_queue_type(struct scsi_device *sdev, int tag_type)
 }
 EXPORT_SYMBOL(fc_change_queue_type);
 
-void fc_fcp_destroy(struct fc_lport *lp)
+/**
+ * fc_fcp_destory() - Tear down the FCP layer for a given local port
+ * @lport: The local port that no longer needs the FCP layer
+ */
+void fc_fcp_destroy(struct fc_lport *lport)
 {
-	struct fc_fcp_internal *si = fc_get_scsi_internal(lp);
+	struct fc_fcp_internal *si = fc_get_scsi_internal(lport);
 
 	if (!list_empty(&si->scsi_pkt_queue))
 		printk(KERN_ERR "libfc: Leaked SCSI packets when destroying "
-		       "port (%6x)\n", fc_host_port_id(lp->host));
+		       "port (%6x)\n", fc_host_port_id(lport->host));
 
 	mempool_destroy(si->scsi_pkt_pool);
 	kfree(si);
-	lp->scsi_priv = NULL;
+	lport->scsi_priv = NULL;
 }
 EXPORT_SYMBOL(fc_fcp_destroy);
 
@@ -2061,24 +2148,28 @@ void fc_destroy_fcp()
 		kmem_cache_destroy(scsi_pkt_cachep);
 }
 
-int fc_fcp_init(struct fc_lport *lp)
+/**
+ * fc_fcp_init() - Initialize the FCP layer for a local port
+ * @lport: The local port to initialize the exchange layer for
+ */
+int fc_fcp_init(struct fc_lport *lport)
 {
 	int rc;
 	struct fc_fcp_internal *si;
 
-	if (!lp->tt.fcp_cmd_send)
-		lp->tt.fcp_cmd_send = fc_fcp_cmd_send;
+	if (!lport->tt.fcp_cmd_send)
+		lport->tt.fcp_cmd_send = fc_fcp_cmd_send;
 
-	if (!lp->tt.fcp_cleanup)
-		lp->tt.fcp_cleanup = fc_fcp_cleanup;
+	if (!lport->tt.fcp_cleanup)
+		lport->tt.fcp_cleanup = fc_fcp_cleanup;
 
-	if (!lp->tt.fcp_abort_io)
-		lp->tt.fcp_abort_io = fc_fcp_abort_io;
+	if (!lport->tt.fcp_abort_io)
+		lport->tt.fcp_abort_io = fc_fcp_abort_io;
 
 	si = kzalloc(sizeof(struct fc_fcp_internal), GFP_KERNEL);
 	if (!si)
 		return -ENOMEM;
-	lp->scsi_priv = si;
+	lport->scsi_priv = si;
 	INIT_LIST_HEAD(&si->scsi_pkt_queue);
 
 	si->scsi_pkt_pool = mempool_create_slab_pool(2, scsi_pkt_cachep);
diff --git a/drivers/scsi/libfc/fc_libfc.c b/drivers/scsi/libfc/fc_libfc.c
index 295eafb..39f4b6a 100644
--- a/drivers/scsi/libfc/fc_libfc.c
+++ b/drivers/scsi/libfc/fc_libfc.c
@@ -75,7 +75,7 @@ module_exit(libfc_exit);
 
 /**
  * fc_copy_buffer_to_sglist() - This routine copies the data of a buffer
- *                              into a scatter-gather list (SG list).
+ *				into a scatter-gather list (SG list).
  *
  * @buf: pointer to the data buffer.
  * @len: the byte-length of the data buffer.
@@ -84,7 +84,7 @@ module_exit(libfc_exit);
  * @offset: pointer to the current offset in the SG list.
  * @km_type: dedicated page table slot type for kmap_atomic.
  * @crc: pointer to the 32-bit crc value.
- *       If crc is NULL, CRC is not calculated.
+ *	 If crc is NULL, CRC is not calculated.
  */
 u32 fc_copy_buffer_to_sglist(void *buf, size_t len,
 			     struct scatterlist *sg,
diff --git a/drivers/scsi/libfc/fc_libfc.h b/drivers/scsi/libfc/fc_libfc.h
index e4b5e92..741fd5c 100644
--- a/drivers/scsi/libfc/fc_libfc.h
+++ b/drivers/scsi/libfc/fc_libfc.h
@@ -22,22 +22,22 @@
 
 #define FC_LIBFC_LOGGING 0x01 /* General logging, not categorized */
 #define FC_LPORT_LOGGING 0x02 /* lport layer logging */
-#define FC_DISC_LOGGING  0x04 /* discovery layer logging */
+#define FC_DISC_LOGGING	 0x04 /* discovery layer logging */
 #define FC_RPORT_LOGGING 0x08 /* rport layer logging */
-#define FC_FCP_LOGGING   0x10 /* I/O path logging */
-#define FC_EM_LOGGING    0x20 /* Exchange Manager logging */
-#define FC_EXCH_LOGGING  0x40 /* Exchange/Sequence logging */
-#define FC_SCSI_LOGGING  0x80 /* SCSI logging (mostly error handling) */
+#define FC_FCP_LOGGING	 0x10 /* I/O path logging */
+#define FC_EM_LOGGING	 0x20 /* Exchange Manager logging */
+#define FC_EXCH_LOGGING	 0x40 /* Exchange/Sequence logging */
+#define FC_SCSI_LOGGING	 0x80 /* SCSI logging (mostly error handling) */
 
 extern unsigned int fc_debug_logging;
 
-#define FC_CHECK_LOGGING(LEVEL, CMD)				\
-do {								\
-	if (unlikely(fc_debug_logging & LEVEL))			\
-		do {						\
-			CMD;					\
-		} while (0);					\
-} while (0)
+#define FC_CHECK_LOGGING(LEVEL, CMD)			\
+	do {						\
+		if (unlikely(fc_debug_logging & LEVEL))	\
+			do {				\
+				CMD;			\
+			} while (0);			\
+	} while (0)
 
 #define FC_LIBFC_DBG(fmt, args...)					\
 	FC_CHECK_LOGGING(FC_LIBFC_LOGGING,				\
@@ -49,10 +49,10 @@ do {								\
 				(lport)->host->host_no,			\
 				fc_host_port_id((lport)->host), ##args))
 
-#define FC_DISC_DBG(disc, fmt, args...)					\
-	FC_CHECK_LOGGING(FC_DISC_LOGGING,				\
-			 printk(KERN_INFO "host%u: disc: " fmt,		\
-				(disc)->lport->host->host_no,		\
+#define FC_DISC_DBG(disc, fmt, args...)				\
+	FC_CHECK_LOGGING(FC_DISC_LOGGING,			\
+			 printk(KERN_INFO "host%u: disc: " fmt,	\
+				(disc)->lport->host->host_no,	\
 				##args))
 
 #define FC_RPORT_ID_DBG(lport, port_id, fmt, args...)			\
@@ -77,7 +77,7 @@ do {								\
 				exch->xid, ##args))
 
 #define FC_SCSI_DBG(lport, fmt, args...)				\
-	FC_CHECK_LOGGING(FC_SCSI_LOGGING,                               \
+	FC_CHECK_LOGGING(FC_SCSI_LOGGING,				\
 			 printk(KERN_INFO "host%u: scsi: " fmt,		\
 				(lport)->host->host_no,	##args))
 
diff --git a/drivers/scsi/libfc/fc_lport.c b/drivers/scsi/libfc/fc_lport.c
index 33f4c2f..a80c61a 100644
--- a/drivers/scsi/libfc/fc_lport.c
+++ b/drivers/scsi/libfc/fc_lport.c
@@ -133,7 +133,7 @@ static const char *fc_lport_state_names[] = {
  * @job:      The passthrough job
  * @lport:    The local port to pass through a command
  * @rsp_code: The expected response code
- * @sg:       job->reply_payload.sg_list
+ * @sg:	      job->reply_payload.sg_list
  * @nents:    job->reply_payload.sg_cnt
  * @offset:   The offset into the response data
  */
@@ -146,6 +146,11 @@ struct fc_bsg_info {
 	size_t offset;
 };
 
+/**
+ * fc_frame_drop() - Dummy frame handler
+ * @lport: The local port the frame was received on
+ * @fp:	   The received frame
+ */
 static int fc_frame_drop(struct fc_lport *lport, struct fc_frame *fp)
 {
 	fc_frame_free(fp);
@@ -172,7 +177,7 @@ static void fc_lport_rport_callback(struct fc_lport *lport,
 	switch (event) {
 	case RPORT_EV_READY:
 		if (lport->state == LPORT_ST_DNS) {
-			lport->dns_rp = rdata;
+			lport->dns_rdata = rdata;
 			fc_lport_enter_ns(lport, LPORT_ST_RNN_ID);
 		} else {
 			FC_LPORT_DBG(lport, "Received an READY event "
@@ -187,7 +192,7 @@ static void fc_lport_rport_callback(struct fc_lport *lport,
 	case RPORT_EV_LOGO:
 	case RPORT_EV_FAILED:
 	case RPORT_EV_STOP:
-		lport->dns_rp = NULL;
+		lport->dns_rdata = NULL;
 		break;
 	case RPORT_EV_NONE:
 		break;
@@ -211,8 +216,8 @@ static const char *fc_lport_state(struct fc_lport *lport)
 
 /**
  * fc_lport_ptp_setup() - Create an rport for point-to-point mode
- * @lport: The lport to attach the ptp rport to
- * @fid: The FID of the ptp rport
+ * @lport:	 The lport to attach the ptp rport to
+ * @remote_fid:	 The FID of the ptp rport
  * @remote_wwpn: The WWPN of the ptp rport
  * @remote_wwnn: The WWNN of the ptp rport
  */
@@ -221,18 +226,22 @@ static void fc_lport_ptp_setup(struct fc_lport *lport,
 			       u64 remote_wwnn)
 {
 	mutex_lock(&lport->disc.disc_mutex);
-	if (lport->ptp_rp)
-		lport->tt.rport_logoff(lport->ptp_rp);
-	lport->ptp_rp = lport->tt.rport_create(lport, remote_fid);
-	lport->ptp_rp->ids.port_name = remote_wwpn;
-	lport->ptp_rp->ids.node_name = remote_wwnn;
+	if (lport->ptp_rdata)
+		lport->tt.rport_logoff(lport->ptp_rdata);
+	lport->ptp_rdata = lport->tt.rport_create(lport, remote_fid);
+	lport->ptp_rdata->ids.port_name = remote_wwpn;
+	lport->ptp_rdata->ids.node_name = remote_wwnn;
 	mutex_unlock(&lport->disc.disc_mutex);
 
-	lport->tt.rport_login(lport->ptp_rp);
+	lport->tt.rport_login(lport->ptp_rdata);
 
 	fc_lport_enter_ready(lport);
 }
 
+/**
+ * fc_get_host_port_type() - Return the port type of the given Scsi_Host
+ * @shost: The SCSI host whose port type is to be determined
+ */
 void fc_get_host_port_type(struct Scsi_Host *shost)
 {
 	/* TODO - currently just NPORT */
@@ -240,25 +249,33 @@ void fc_get_host_port_type(struct Scsi_Host *shost)
 }
 EXPORT_SYMBOL(fc_get_host_port_type);
 
+/**
+ * fc_get_host_port_state() - Return the port state of the given Scsi_Host
+ * @shost:  The SCSI host whose port state is to be determined
+ */
 void fc_get_host_port_state(struct Scsi_Host *shost)
 {
-	struct fc_lport *lp = shost_priv(shost);
+	struct fc_lport *lport = shost_priv(shost);
 
-	mutex_lock(&lp->lp_mutex);
-	if (!lp->link_up)
+	mutex_lock(&lport->lp_mutex);
+	if (!lport->link_up)
 		fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN;
 	else
-		switch (lp->state) {
+		switch (lport->state) {
 		case LPORT_ST_READY:
 			fc_host_port_state(shost) = FC_PORTSTATE_ONLINE;
 			break;
 		default:
 			fc_host_port_state(shost) = FC_PORTSTATE_OFFLINE;
 		}
-	mutex_unlock(&lp->lp_mutex);
+	mutex_unlock(&lport->lp_mutex);
 }
 EXPORT_SYMBOL(fc_get_host_port_state);
 
+/**
+ * fc_get_host_speed() - Return the speed of the given Scsi_Host
+ * @shost: The SCSI host whose port speed is to be determined
+ */
 void fc_get_host_speed(struct Scsi_Host *shost)
 {
 	struct fc_lport *lport = shost_priv(shost);
@@ -267,24 +284,28 @@ void fc_get_host_speed(struct Scsi_Host *shost)
 }
 EXPORT_SYMBOL(fc_get_host_speed);
 
+/**
+ * fc_get_host_stats() - Return the Scsi_Host's statistics
+ * @shost: The SCSI host whose statistics are to be returned
+ */
 struct fc_host_statistics *fc_get_host_stats(struct Scsi_Host *shost)
 {
 	struct fc_host_statistics *fcoe_stats;
-	struct fc_lport *lp = shost_priv(shost);
+	struct fc_lport *lport = shost_priv(shost);
 	struct timespec v0, v1;
 	unsigned int cpu;
 
-	fcoe_stats = &lp->host_stats;
+	fcoe_stats = &lport->host_stats;
 	memset(fcoe_stats, 0, sizeof(struct fc_host_statistics));
 
 	jiffies_to_timespec(jiffies, &v0);
-	jiffies_to_timespec(lp->boot_time, &v1);
+	jiffies_to_timespec(lport->boot_time, &v1);
 	fcoe_stats->seconds_since_last_reset = (v0.tv_sec - v1.tv_sec);
 
 	for_each_possible_cpu(cpu) {
 		struct fcoe_dev_stats *stats;
 
-		stats = per_cpu_ptr(lp->dev_stats, cpu);
+		stats = per_cpu_ptr(lport->dev_stats, cpu);
 
 		fcoe_stats->tx_frames += stats->TxFrames;
 		fcoe_stats->tx_words += stats->TxWords;
@@ -309,12 +330,15 @@ struct fc_host_statistics *fc_get_host_stats(struct Scsi_Host *shost)
 }
 EXPORT_SYMBOL(fc_get_host_stats);
 
-/*
- * Fill in FLOGI command for request.
+/**
+ * fc_lport_flogi_fill() - Fill in FLOGI command for request
+ * @lport: The local port the FLOGI is for
+ * @flogi: The FLOGI command
+ * @op:	   The opcode
  */
-static void
-fc_lport_flogi_fill(struct fc_lport *lport, struct fc_els_flogi *flogi,
-		    unsigned int op)
+static void fc_lport_flogi_fill(struct fc_lport *lport,
+				struct fc_els_flogi *flogi,
+				unsigned int op)
 {
 	struct fc_els_csp *sp;
 	struct fc_els_cssp *cp;
@@ -342,8 +366,10 @@ fc_lport_flogi_fill(struct fc_lport *lport, struct fc_els_flogi *flogi,
 	}
 }
 
-/*
- * Add a supported FC-4 type.
+/**
+ * fc_lport_add_fc4_type() - Add a supported FC-4 type to a local port
+ * @lport: The local port to add a new FC-4 type to
+ * @type:  The new FC-4 type
  */
 static void fc_lport_add_fc4_type(struct fc_lport *lport, enum fc_fh_type type)
 {
@@ -355,9 +381,9 @@ static void fc_lport_add_fc4_type(struct fc_lport *lport, enum fc_fh_type type)
 
 /**
  * fc_lport_recv_rlir_req() - Handle received Registered Link Incident Report.
+ * @sp:	   The sequence in the RLIR exchange
+ * @fp:	   The RLIR request frame
  * @lport: Fibre Channel local port recieving the RLIR
- * @sp: current sequence in the RLIR exchange
- * @fp: RLIR request frame
  *
  * Locking Note: The lport lock is exected to be held before calling
  * this function.
@@ -374,9 +400,9 @@ static void fc_lport_recv_rlir_req(struct fc_seq *sp, struct fc_frame *fp,
 
 /**
  * fc_lport_recv_echo_req() - Handle received ECHO request
- * @lport: Fibre Channel local port recieving the ECHO
- * @sp: current sequence in the ECHO exchange
- * @fp: ECHO request frame
+ * @sp:	   The sequence in the ECHO exchange
+ * @fp:	   ECHO request frame
+ * @lport: The local port recieving the ECHO
  *
  * Locking Note: The lport lock is exected to be held before calling
  * this function.
@@ -416,9 +442,9 @@ static void fc_lport_recv_echo_req(struct fc_seq *sp, struct fc_frame *in_fp,
 
 /**
  * fc_lport_recv_echo_req() - Handle received Request Node ID data request
- * @lport: Fibre Channel local port recieving the RNID
- * @sp: current sequence in the RNID exchange
- * @fp: RNID request frame
+ * @sp:	   The sequence in the RNID exchange
+ * @fp:	   The RNID request frame
+ * @lport: The local port recieving the RNID
  *
  * Locking Note: The lport lock is exected to be held before calling
  * this function.
@@ -483,9 +509,9 @@ static void fc_lport_recv_rnid_req(struct fc_seq *sp, struct fc_frame *in_fp,
 
 /**
  * fc_lport_recv_logo_req() - Handle received fabric LOGO request
- * @lport: Fibre Channel local port recieving the LOGO
- * @sp: current sequence in the LOGO exchange
- * @fp: LOGO request frame
+ * @sp:	   The sequence in the LOGO exchange
+ * @fp:	   The LOGO request frame
+ * @lport: The local port recieving the LOGO
  *
  * Locking Note: The lport lock is exected to be held before calling
  * this function.
@@ -500,7 +526,7 @@ static void fc_lport_recv_logo_req(struct fc_seq *sp, struct fc_frame *fp,
 
 /**
  * fc_fabric_login() - Start the lport state machine
- * @lport: The lport that should log into the fabric
+ * @lport: The local port that should log into the fabric
  *
  * Locking Note: This function should not be called
  *		 with the lport lock held.
@@ -538,7 +564,7 @@ void __fc_linkup(struct fc_lport *lport)
 
 /**
  * fc_linkup() - Handler for transport linkup events
- * @lport: The lport whose link is up
+ * @lport: The local port whose link is up
  */
 void fc_linkup(struct fc_lport *lport)
 {
@@ -568,7 +594,7 @@ void __fc_linkdown(struct fc_lport *lport)
 
 /**
  * fc_linkdown() - Handler for transport linkdown events
- * @lport: The lport whose link is down
+ * @lport: The local port whose link is down
  */
 void fc_linkdown(struct fc_lport *lport)
 {
@@ -583,7 +609,7 @@ EXPORT_SYMBOL(fc_linkdown);
 
 /**
  * fc_fabric_logoff() - Logout of the fabric
- * @lport:	      fc_lport pointer to logoff the fabric
+ * @lport: The local port to logoff the fabric
  *
  * Return value:
  *	0 for success, -1 for failure
@@ -592,8 +618,8 @@ int fc_fabric_logoff(struct fc_lport *lport)
 {
 	lport->tt.disc_stop_final(lport);
 	mutex_lock(&lport->lp_mutex);
-	if (lport->dns_rp)
-		lport->tt.rport_logoff(lport->dns_rp);
+	if (lport->dns_rdata)
+		lport->tt.rport_logoff(lport->dns_rdata);
 	mutex_unlock(&lport->lp_mutex);
 	lport->tt.rport_flush_queue();
 	mutex_lock(&lport->lp_mutex);
@@ -605,11 +631,9 @@ int fc_fabric_logoff(struct fc_lport *lport)
 EXPORT_SYMBOL(fc_fabric_logoff);
 
 /**
- * fc_lport_destroy() - unregister a fc_lport
- * @lport:	      fc_lport pointer to unregister
+ * fc_lport_destroy() - Unregister a fc_lport
+ * @lport: The local port to unregister
  *
- * Return value:
- *	None
  * Note:
  * exit routine for fc_lport instance
  * clean-up all the allocated memory
@@ -632,13 +656,9 @@ int fc_lport_destroy(struct fc_lport *lport)
 EXPORT_SYMBOL(fc_lport_destroy);
 
 /**
- * fc_set_mfs() - sets up the mfs for the corresponding fc_lport
- * @lport: fc_lport pointer to unregister
- * @mfs: the new mfs for fc_lport
- *
- * Set mfs for the given fc_lport to the new mfs.
- *
- * Return: 0 for success
+ * fc_set_mfs() - Set the maximum frame size for a local port
+ * @lport: The local port to set the MFS for
+ * @mfs:   The new MFS
  */
 int fc_set_mfs(struct fc_lport *lport, u32 mfs)
 {
@@ -669,7 +689,7 @@ EXPORT_SYMBOL(fc_set_mfs);
 
 /**
  * fc_lport_disc_callback() - Callback for discovery events
- * @lport: FC local port
+ * @lport: The local port receiving the event
  * @event: The discovery event
  */
 void fc_lport_disc_callback(struct fc_lport *lport, enum fc_disc_event event)
@@ -693,7 +713,7 @@ void fc_lport_disc_callback(struct fc_lport *lport, enum fc_disc_event event)
 
 /**
  * fc_rport_enter_ready() - Enter the ready state and start discovery
- * @lport: Fibre Channel local port that is ready
+ * @lport: The local port that is ready
  *
  * Locking Note: The lport lock is expected to be held before calling
  * this routine.
@@ -708,15 +728,15 @@ static void fc_lport_enter_ready(struct fc_lport *lport)
 		fc_vport_set_state(lport->vport, FC_VPORT_ACTIVE);
 	fc_vports_linkchange(lport);
 
-	if (!lport->ptp_rp)
+	if (!lport->ptp_rdata)
 		lport->tt.disc_start(fc_lport_disc_callback, lport);
 }
 
 /**
  * fc_lport_recv_flogi_req() - Receive a FLOGI request
  * @sp_in: The sequence the FLOGI is on
- * @rx_fp: The frame the FLOGI is in
- * @lport: The lport that recieved the request
+ * @rx_fp: The FLOGI frame
+ * @lport: The local port that recieved the request
  *
  * A received FLOGI request indicates a point-to-point connection.
  * Accept it with the common service parameters indicating our N port.
@@ -802,9 +822,9 @@ out:
 
 /**
  * fc_lport_recv_req() - The generic lport request handler
- * @lport: The lport that received the request
- * @sp: The sequence the request is on
- * @fp: The frame the request is in
+ * @lport: The local port that received the request
+ * @sp:	   The sequence the request is on
+ * @fp:	   The request frame
  *
  * This function will see if the lport handles the request or
  * if an rport should handle the request.
@@ -872,8 +892,8 @@ static void fc_lport_recv_req(struct fc_lport *lport, struct fc_seq *sp,
 }
 
 /**
- * fc_lport_reset() - Reset an lport
- * @lport: The lport which should be reset
+ * fc_lport_reset() - Reset a local port
+ * @lport: The local port which should be reset
  *
  * Locking Note: This functions should not be called with the
  *		 lport lock held.
@@ -889,18 +909,18 @@ int fc_lport_reset(struct fc_lport *lport)
 EXPORT_SYMBOL(fc_lport_reset);
 
 /**
- * fc_lport_reset_locked() - Reset the local port
- * @lport: Fibre Channel local port to be reset
+ * fc_lport_reset_locked() - Reset the local port w/ the lport lock held
+ * @lport: The local port to be reset
  *
  * Locking Note: The lport lock is expected to be held before calling
  * this routine.
  */
 static void fc_lport_reset_locked(struct fc_lport *lport)
 {
-	if (lport->dns_rp)
-		lport->tt.rport_logoff(lport->dns_rp);
+	if (lport->dns_rdata)
+		lport->tt.rport_logoff(lport->dns_rdata);
 
-	lport->ptp_rp = NULL;
+	lport->ptp_rdata = NULL;
 
 	lport->tt.disc_stop(lport);
 
@@ -911,7 +931,7 @@ static void fc_lport_reset_locked(struct fc_lport *lport)
 
 /**
  * fc_lport_enter_reset() - Reset the local port
- * @lport: Fibre Channel local port to be reset
+ * @lport: The local port to be reset
  *
  * Locking Note: The lport lock is expected to be held before calling
  * this routine.
@@ -935,8 +955,8 @@ static void fc_lport_enter_reset(struct fc_lport *lport)
 }
 
 /**
- * fc_lport_enter_disabled() - disable the local port
- * @lport: Fibre Channel local port to be reset
+ * fc_lport_enter_disabled() - Disable the local port
+ * @lport: The local port to be reset
  *
  * Locking Note: The lport lock is expected to be held before calling
  * this routine.
@@ -953,8 +973,8 @@ static void fc_lport_enter_disabled(struct fc_lport *lport)
 
 /**
  * fc_lport_error() - Handler for any errors
- * @lport: The fc_lport object
- * @fp: The frame pointer
+ * @lport: The local port that the error was on
+ * @fp:	   The error code encoded in a frame pointer
  *
  * If the error was caused by a resource allocation failure
  * then wait for half a second and retry, otherwise retry
@@ -1002,13 +1022,13 @@ static void fc_lport_error(struct fc_lport *lport, struct fc_frame *fp)
 
 /**
  * fc_lport_ns_resp() - Handle response to a name server
- * 			registration exchange
- * @sp: current sequence in exchange
- * @fp: response frame
+ *			registration exchange
+ * @sp:	    current sequence in exchange
+ * @fp:	    response frame
  * @lp_arg: Fibre Channel host port instance
  *
  * Locking Note: This function will be called without the lport lock
- * held, but it will lock, call an _enter_* function or fc_lport_error
+ * held, but it will lock, call an _enter_* function or fc_lport_error()
  * and then unlock the lport.
  */
 static void fc_lport_ns_resp(struct fc_seq *sp, struct fc_frame *fp,
@@ -1027,7 +1047,7 @@ static void fc_lport_ns_resp(struct fc_seq *sp, struct fc_frame *fp,
 
 	if (lport->state < LPORT_ST_RNN_ID || lport->state > LPORT_ST_RFT_ID) {
 		FC_LPORT_DBG(lport, "Received a name server response, "
-				    "but in state %s\n", fc_lport_state(lport));
+			     "but in state %s\n", fc_lport_state(lport));
 		if (IS_ERR(fp))
 			goto err;
 		goto out;
@@ -1072,8 +1092,8 @@ err:
 
 /**
  * fc_lport_scr_resp() - Handle response to State Change Register (SCR) request
- * @sp: current sequence in SCR exchange
- * @fp: response frame
+ * @sp:	    current sequence in SCR exchange
+ * @fp:	    response frame
  * @lp_arg: Fibre Channel lport port instance that sent the registration request
  *
  * Locking Note: This function will be called without the lport lock
@@ -1119,8 +1139,8 @@ err:
 }
 
 /**
- * fc_lport_enter_scr() - Send a State Change Register (SCR) request
- * @lport: Fibre Channel local port to register for state changes
+ * fc_lport_enter_scr() - Send a SCR (State Change Register) request
+ * @lport: The local port to register for state changes
  *
  * Locking Note: The lport lock is expected to be held before calling
  * this routine.
@@ -1212,8 +1232,8 @@ static struct fc_rport_operations fc_lport_rport_ops = {
 };
 
 /**
- * fc_rport_enter_dns() - Create a rport to the name server
- * @lport: Fibre Channel local port requesting a rport for the name server
+ * fc_rport_enter_dns() - Create a fc_rport for the name server
+ * @lport: The local port requesting a remote port for the name server
  *
  * Locking Note: The lport lock is expected to be held before calling
  * this routine.
@@ -1242,8 +1262,8 @@ err:
 }
 
 /**
- * fc_lport_timeout() - Handler for the retry_work timer.
- * @work: The work struct of the fc_lport
+ * fc_lport_timeout() - Handler for the retry_work timer
+ * @work: The work struct of the local port
  */
 static void fc_lport_timeout(struct work_struct *work)
 {
@@ -1284,16 +1304,16 @@ static void fc_lport_timeout(struct work_struct *work)
 
 /**
  * fc_lport_logo_resp() - Handle response to LOGO request
- * @sp: current sequence in LOGO exchange
- * @fp: response frame
- * @lp_arg: Fibre Channel lport port instance that sent the LOGO request
+ * @sp:	    The sequence that the LOGO was on
+ * @fp:	    The LOGO frame
+ * @lp_arg: The lport port that received the LOGO request
  *
  * Locking Note: This function will be called without the lport lock
- * held, but it will lock, call an _enter_* function or fc_lport_error
+ * held, but it will lock, call an _enter_* function or fc_lport_error()
  * and then unlock the lport.
  */
 void fc_lport_logo_resp(struct fc_seq *sp, struct fc_frame *fp,
-			       void *lp_arg)
+			void *lp_arg)
 {
 	struct fc_lport *lport = lp_arg;
 	u8 op;
@@ -1333,7 +1353,7 @@ EXPORT_SYMBOL(fc_lport_logo_resp);
 
 /**
  * fc_rport_enter_logo() - Logout of the fabric
- * @lport: Fibre Channel local port to be logged out
+ * @lport: The local port to be logged out
  *
  * Locking Note: The lport lock is expected to be held before calling
  * this routine.
@@ -1362,16 +1382,16 @@ static void fc_lport_enter_logo(struct fc_lport *lport)
 
 /**
  * fc_lport_flogi_resp() - Handle response to FLOGI request
- * @sp: current sequence in FLOGI exchange
- * @fp: response frame
- * @lp_arg: Fibre Channel lport port instance that sent the FLOGI request
+ * @sp:	    The sequence that the FLOGI was on
+ * @fp:	    The FLOGI response frame
+ * @lp_arg: The lport port that received the FLOGI response
  *
  * Locking Note: This function will be called without the lport lock
- * held, but it will lock, call an _enter_* function or fc_lport_error
+ * held, but it will lock, call an _enter_* function or fc_lport_error()
  * and then unlock the lport.
  */
 void fc_lport_flogi_resp(struct fc_seq *sp, struct fc_frame *fp,
-				void *lp_arg)
+			 void *lp_arg)
 {
 	struct fc_lport *lport = lp_arg;
 	struct fc_frame_header *fh;
@@ -1481,7 +1501,10 @@ void fc_lport_enter_flogi(struct fc_lport *lport)
 		fc_lport_error(lport, fp);
 }
 
-/* Configure a fc_lport */
+/**
+ * fc_lport_config() - Configure a fc_lport
+ * @lport: The local port to be configured
+ */
 int fc_lport_config(struct fc_lport *lport)
 {
 	INIT_DELAYED_WORK(&lport->retry_work, fc_lport_timeout);
@@ -1496,6 +1519,10 @@ int fc_lport_config(struct fc_lport *lport)
 }
 EXPORT_SYMBOL(fc_lport_config);
 
+/**
+ * fc_lport_init() - Initialize the lport layer for a local port
+ * @lport: The local port to initialize the exchange layer for
+ */
 int fc_lport_init(struct fc_lport *lport)
 {
 	if (!lport->tt.lport_recv)
@@ -1530,10 +1557,10 @@ int fc_lport_init(struct fc_lport *lport)
 EXPORT_SYMBOL(fc_lport_init);
 
 /**
- * fc_lport_bsg_resp() - The common response handler for fc pass-thru requests
- * @sp: current sequence in the fc pass-thru request exchange
- * @fp: received response frame
- * @info_arg: pointer to struct fc_bsg_info
+ * fc_lport_bsg_resp() - The common response handler for FC Passthrough requests
+ * @sp:	      The sequence for the FC Passthrough response
+ * @fp:	      The response frame
+ * @info_arg: The BSG info that the response is for
  */
 static void fc_lport_bsg_resp(struct fc_seq *sp, struct fc_frame *fp,
 			      void *info_arg)
@@ -1593,10 +1620,10 @@ static void fc_lport_bsg_resp(struct fc_seq *sp, struct fc_frame *fp,
 }
 
 /**
- * fc_lport_els_request() - Send ELS pass-thru request
- * @job: The bsg fc pass-thru job structure
+ * fc_lport_els_request() - Send ELS passthrough request
+ * @job:   The BSG Passthrough job
  * @lport: The local port sending the request
- * @did: The destination port id.
+ * @did:   The destination port id
  *
  * Locking Note: The lport lock is expected to be held before calling
  * this routine.
@@ -1653,11 +1680,11 @@ static int fc_lport_els_request(struct fc_bsg_job *job,
 }
 
 /**
- * fc_lport_ct_request() - Send CT pass-thru request
- * @job:   The bsg fc pass-thru job structure
+ * fc_lport_ct_request() - Send CT Passthrough request
+ * @job:   The BSG Passthrough job
  * @lport: The local port sending the request
  * @did:   The destination FC-ID
- * @tov:   The time to wait for a response
+ * @tov:   The timeout period to wait for the response
  *
  * Locking Note: The lport lock is expected to be held before calling
  * this routine.
@@ -1714,8 +1741,8 @@ static int fc_lport_ct_request(struct fc_bsg_job *job,
 
 /**
  * fc_lport_bsg_request() - The common entry point for sending
- *                          fc pass-thru requests
- * @job: The fc pass-thru job structure
+ *			    FC Passthrough requests
+ * @job: The BSG passthrough job
  */
 int fc_lport_bsg_request(struct fc_bsg_job *job)
 {
@@ -1756,7 +1783,7 @@ int fc_lport_bsg_request(struct fc_bsg_job *job)
 	case FC_BSG_HST_CT:
 		did = ntoh24(job->request->rqst_data.h_ct.port_id);
 		if (did == FC_FID_DIR_SERV)
-			rdata = lport->dns_rp;
+			rdata = lport->dns_rdata;
 		else
 			rdata = lport->tt.rport_lookup(lport, did);
 
diff --git a/drivers/scsi/libfc/fc_rport.c b/drivers/scsi/libfc/fc_rport.c
index 239fe54..c6a15e3 100644
--- a/drivers/scsi/libfc/fc_rport.c
+++ b/drivers/scsi/libfc/fc_rport.c
@@ -91,9 +91,9 @@ static const char *fc_rport_state_names[] = {
 };
 
 /**
- * fc_rport_lookup() - lookup a remote port by port_id
- * @lport: Fibre Channel host port instance
- * @port_id: remote port port_id to match
+ * fc_rport_lookup() - Lookup a remote port by port_id
+ * @lport:   The local port to lookup the remote port on
+ * @port_id: The remote port ID to look up
  */
 static struct fc_rport_priv *fc_rport_lookup(const struct fc_lport *lport,
 					     u32 port_id)
@@ -109,8 +109,10 @@ static struct fc_rport_priv *fc_rport_lookup(const struct fc_lport *lport,
 
 /**
  * fc_rport_create() - Create a new remote port
- * @lport:   The local port that the new remote port is for
- * @port_id: The port ID for the new remote port
+ * @lport: The local port this remote port will be associated with
+ * @ids:   The identifiers for the new remote port
+ *
+ * The remote port will start in the INIT state.
  *
  * Locking note:  must be called with the disc_mutex held.
  */
@@ -149,8 +151,8 @@ static struct fc_rport_priv *fc_rport_create(struct fc_lport *lport,
 }
 
 /**
- * fc_rport_destroy() - free a remote port after last reference is released.
- * @kref: pointer to kref inside struct fc_rport_priv
+ * fc_rport_destroy() - Free a remote port after last reference is released
+ * @kref: The remote port's kref
  */
 static void fc_rport_destroy(struct kref *kref)
 {
@@ -161,8 +163,8 @@ static void fc_rport_destroy(struct kref *kref)
 }
 
 /**
- * fc_rport_state() - return a string for the state the rport is in
- * @rdata: remote port private data
+ * fc_rport_state() - Return a string identifying the remote port's state
+ * @rdata: The remote port
  */
 static const char *fc_rport_state(struct fc_rport_priv *rdata)
 {
@@ -175,9 +177,9 @@ static const char *fc_rport_state(struct fc_rport_priv *rdata)
 }
 
 /**
- * fc_set_rport_loss_tmo() - Set the remote port loss timeout in seconds.
- * @rport: Pointer to Fibre Channel remote port structure
- * @timeout: timeout in seconds
+ * fc_set_rport_loss_tmo() - Set the remote port loss timeout
+ * @rport:   The remote port that gets a new timeout value
+ * @timeout: The new timeout value (in seconds)
  */
 void fc_set_rport_loss_tmo(struct fc_rport *rport, u32 timeout)
 {
@@ -189,9 +191,11 @@ void fc_set_rport_loss_tmo(struct fc_rport *rport, u32 timeout)
 EXPORT_SYMBOL(fc_set_rport_loss_tmo);
 
 /**
- * fc_plogi_get_maxframe() - Get max payload from the common service parameters
- * @flp: FLOGI payload structure
- * @maxval: upper limit, may be less than what is in the service parameters
+ * fc_plogi_get_maxframe() - Get the maximum payload from the common service
+ *			     parameters in a FLOGI frame
+ * @flp:    The FLOGI payload
+ * @maxval: The maximum frame size upper limit; this may be less than what
+ *	    is in the service parameters
  */
 static unsigned int fc_plogi_get_maxframe(struct fc_els_flogi *flp,
 					  unsigned int maxval)
@@ -212,9 +216,9 @@ static unsigned int fc_plogi_get_maxframe(struct fc_els_flogi *flp,
 }
 
 /**
- * fc_rport_state_enter() - Change the rport's state
- * @rdata: The rport whose state should change
- * @new: The new state of the rport
+ * fc_rport_state_enter() - Change the state of a remote port
+ * @rdata: The remote port whose state should change
+ * @new:   The new state
  *
  * Locking Note: Called with the rport lock held
  */
@@ -226,12 +230,16 @@ static void fc_rport_state_enter(struct fc_rport_priv *rdata,
 	rdata->rp_state = new;
 }
 
+/**
+ * fc_rport_work() - Handler for remote port events in the rport_event_queue
+ * @work: Handle to the remote port being dequeued
+ */
 static void fc_rport_work(struct work_struct *work)
 {
 	u32 port_id;
 	struct fc_rport_priv *rdata =
 		container_of(work, struct fc_rport_priv, event_work);
-	struct fc_rport_libfc_priv *rp;
+	struct fc_rport_libfc_priv *rpriv;
 	enum fc_rport_event event;
 	struct fc_lport *lport = rdata->local_port;
 	struct fc_rport_operations *rport_ops;
@@ -267,12 +275,12 @@ static void fc_rport_work(struct work_struct *work)
 		rport->maxframe_size = rdata->maxframe_size;
 		rport->supported_classes = rdata->supported_classes;
 
-		rp = rport->dd_data;
-		rp->local_port = lport;
-		rp->rp_state = rdata->rp_state;
-		rp->flags = rdata->flags;
-		rp->e_d_tov = rdata->e_d_tov;
-		rp->r_a_tov = rdata->r_a_tov;
+		rpriv = rport->dd_data;
+		rpriv->local_port = lport;
+		rpriv->rp_state = rdata->rp_state;
+		rpriv->flags = rdata->flags;
+		rpriv->e_d_tov = rdata->e_d_tov;
+		rpriv->r_a_tov = rdata->r_a_tov;
 		mutex_unlock(&rdata->rp_mutex);
 
 		if (rport_ops && rport_ops->event_callback) {
@@ -307,8 +315,8 @@ static void fc_rport_work(struct work_struct *work)
 		lport->tt.exch_mgr_reset(lport, port_id, 0);
 
 		if (rport) {
-			rp = rport->dd_data;
-			rp->rp_state = RPORT_ST_DELETE;
+			rpriv = rport->dd_data;
+			rpriv->rp_state = RPORT_ST_DELETE;
 			mutex_lock(&rdata->rp_mutex);
 			rdata->rport = NULL;
 			mutex_unlock(&rdata->rp_mutex);
@@ -325,7 +333,7 @@ static void fc_rport_work(struct work_struct *work)
 
 /**
  * fc_rport_login() - Start the remote port login state machine
- * @rdata: private remote port
+ * @rdata: The remote port to be logged in to
  *
  * Locking Note: Called without the rport lock held. This
  * function will hold the rport lock, call an _enter_*
@@ -355,9 +363,9 @@ int fc_rport_login(struct fc_rport_priv *rdata)
 }
 
 /**
- * fc_rport_enter_delete() - schedule a remote port to be deleted.
- * @rdata: private remote port
- * @event: event to report as the reason for deletion
+ * fc_rport_enter_delete() - Schedule a remote port to be deleted
+ * @rdata: The remote port to be deleted
+ * @event: The event to report as the reason for deletion
  *
  * Locking Note: Called with the rport lock held.
  *
@@ -384,8 +392,8 @@ static void fc_rport_enter_delete(struct fc_rport_priv *rdata,
 }
 
 /**
- * fc_rport_logoff() - Logoff and remove an rport
- * @rdata: private remote port
+ * fc_rport_logoff() - Logoff and remove a remote port
+ * @rdata: The remote port to be logged off of
  *
  * Locking Note: Called without the rport lock held. This
  * function will hold the rport lock, call an _enter_*
@@ -417,8 +425,8 @@ out:
 }
 
 /**
- * fc_rport_enter_ready() - The rport is ready
- * @rdata: private remote port
+ * fc_rport_enter_ready() - Transition to the RPORT_ST_READY state
+ * @rdata: The remote port that is ready
  *
  * Locking Note: The rport lock is expected to be held before calling
  * this routine.
@@ -435,8 +443,8 @@ static void fc_rport_enter_ready(struct fc_rport_priv *rdata)
 }
 
 /**
- * fc_rport_timeout() - Handler for the retry_work timer.
- * @work: The work struct of the fc_rport_priv
+ * fc_rport_timeout() - Handler for the retry_work timer
+ * @work: Handle to the remote port that has timed out
  *
  * Locking Note: Called without the rport lock held. This
  * function will hold the rport lock, call an _enter_*
@@ -476,8 +484,8 @@ static void fc_rport_timeout(struct work_struct *work)
 
 /**
  * fc_rport_error() - Error handler, called once retries have been exhausted
- * @rdata: private remote port
- * @fp: The frame pointer
+ * @rdata: The remote port the error is happened on
+ * @fp:	   The error code encapsulated in a frame pointer
  *
  * Locking Note: The rport lock is expected to be held before
  * calling this routine
@@ -508,9 +516,9 @@ static void fc_rport_error(struct fc_rport_priv *rdata, struct fc_frame *fp)
 }
 
 /**
- * fc_rport_error_retry() - Error handler when retries are desired
- * @rdata: private remote port data
- * @fp: The frame pointer
+ * fc_rport_error_retry() - Handler for remote port state retries
+ * @rdata: The remote port whose state is to be retried
+ * @fp:	   The error code encapsulated in a frame pointer
  *
  * If the error was an exchange timeout retry immediately,
  * otherwise wait for E_D_TOV.
@@ -542,10 +550,10 @@ static void fc_rport_error_retry(struct fc_rport_priv *rdata,
 }
 
 /**
- * fc_rport_plogi_recv_resp() - Handle incoming ELS PLOGI response
- * @sp: current sequence in the PLOGI exchange
- * @fp: response frame
- * @rdata_arg: private remote port data
+ * fc_rport_plogi_recv_resp() - Handler for ELS PLOGI responses
+ * @sp:	       The sequence the PLOGI is on
+ * @fp:	       The PLOGI response frame
+ * @rdata_arg: The remote port that sent the PLOGI response
  *
  * Locking Note: This function will be called without the rport lock
  * held, but it will lock, call an _enter_* function or fc_rport_error
@@ -608,8 +616,8 @@ err:
 }
 
 /**
- * fc_rport_enter_plogi() - Send Port Login (PLOGI) request to peer
- * @rdata: private remote port data
+ * fc_rport_enter_plogi() - Send Port Login (PLOGI) request
+ * @rdata: The remote port to send a PLOGI to
  *
  * Locking Note: The rport lock is expected to be held before calling
  * this routine.
@@ -641,9 +649,9 @@ static void fc_rport_enter_plogi(struct fc_rport_priv *rdata)
 
 /**
  * fc_rport_prli_resp() - Process Login (PRLI) response handler
- * @sp: current sequence in the PRLI exchange
- * @fp: response frame
- * @rdata_arg: private remote port data
+ * @sp:	       The sequence the PRLI response was on
+ * @fp:	       The PRLI response frame
+ * @rdata_arg: The remote port that sent the PRLI response
  *
  * Locking Note: This function will be called without the rport lock
  * held, but it will lock, call an _enter_* function or fc_rport_error
@@ -712,10 +720,10 @@ err:
 }
 
 /**
- * fc_rport_logo_resp() - Logout (LOGO) response handler
- * @sp: current sequence in the LOGO exchange
- * @fp: response frame
- * @rdata_arg: private remote port data
+ * fc_rport_logo_resp() - Handler for logout (LOGO) responses
+ * @sp:	       The sequence the LOGO was on
+ * @fp:	       The LOGO response frame
+ * @rdata_arg: The remote port that sent the LOGO response
  *
  * Locking Note: This function will be called without the rport lock
  * held, but it will lock, call an _enter_* function or fc_rport_error
@@ -758,8 +766,8 @@ err:
 }
 
 /**
- * fc_rport_enter_prli() - Send Process Login (PRLI) request to peer
- * @rdata: private remote port data
+ * fc_rport_enter_prli() - Send Process Login (PRLI) request
+ * @rdata: The remote port to send the PRLI request to
  *
  * Locking Note: The rport lock is expected to be held before calling
  * this routine.
@@ -801,10 +809,10 @@ static void fc_rport_enter_prli(struct fc_rport_priv *rdata)
 }
 
 /**
- * fc_rport_els_rtv_resp() - Request Timeout Value response handler
- * @sp: current sequence in the RTV exchange
- * @fp: response frame
- * @rdata_arg: private remote port data
+ * fc_rport_els_rtv_resp() - Handler for Request Timeout Value (RTV) responses
+ * @sp:	       The sequence the RTV was on
+ * @fp:	       The RTV response frame
+ * @rdata_arg: The remote port that sent the RTV response
  *
  * Many targets don't seem to support this.
  *
@@ -867,8 +875,8 @@ err:
 }
 
 /**
- * fc_rport_enter_rtv() - Send Request Timeout Value (RTV) request to peer
- * @rdata: private remote port data
+ * fc_rport_enter_rtv() - Send Request Timeout Value (RTV) request
+ * @rdata: The remote port to send the RTV request to
  *
  * Locking Note: The rport lock is expected to be held before calling
  * this routine.
@@ -890,15 +898,15 @@ static void fc_rport_enter_rtv(struct fc_rport_priv *rdata)
 	}
 
 	if (!lport->tt.elsct_send(lport, rdata->ids.port_id, fp, ELS_RTV,
-				     fc_rport_rtv_resp, rdata, lport->e_d_tov))
+				  fc_rport_rtv_resp, rdata, lport->e_d_tov))
 		fc_rport_error_retry(rdata, fp);
 	else
 		kref_get(&rdata->kref);
 }
 
 /**
- * fc_rport_enter_logo() - Send Logout (LOGO) request to peer
- * @rdata: private remote port data
+ * fc_rport_enter_logo() - Send a logout (LOGO) request
+ * @rdata: The remote port to send the LOGO request to
  *
  * Locking Note: The rport lock is expected to be held before calling
  * this routine.
@@ -927,17 +935,17 @@ static void fc_rport_enter_logo(struct fc_rport_priv *rdata)
 }
 
 /**
- * fc_rport_els_adisc_resp() - Address Discovery response handler
- * @sp: current sequence in the ADISC exchange
- * @fp: response frame
- * @rdata_arg: remote port private.
+ * fc_rport_els_adisc_resp() - Handler for Address Discovery (ADISC) responses
+ * @sp:	       The sequence the ADISC response was on
+ * @fp:	       The ADISC response frame
+ * @rdata_arg: The remote port that sent the ADISC response
  *
  * Locking Note: This function will be called without the rport lock
  * held, but it will lock, call an _enter_* function or fc_rport_error
  * and then unlock the rport.
  */
 static void fc_rport_adisc_resp(struct fc_seq *sp, struct fc_frame *fp,
-			      void *rdata_arg)
+				void *rdata_arg)
 {
 	struct fc_rport_priv *rdata = rdata_arg;
 	struct fc_els_adisc *adisc;
@@ -985,8 +993,8 @@ err:
 }
 
 /**
- * fc_rport_enter_adisc() - Send Address Discover (ADISC) request to peer
- * @rdata: remote port private data
+ * fc_rport_enter_adisc() - Send Address Discover (ADISC) request
+ * @rdata: The remote port to send the ADISC request to
  *
  * Locking Note: The rport lock is expected to be held before calling
  * this routine.
@@ -1014,10 +1022,10 @@ static void fc_rport_enter_adisc(struct fc_rport_priv *rdata)
 }
 
 /**
- * fc_rport_recv_adisc_req() - Handle incoming Address Discovery (ADISC) Request
- * @rdata: remote port private
- * @sp: current sequence in the ADISC exchange
- * @in_fp: ADISC request frame
+ * fc_rport_recv_adisc_req() - Handler for Address Discovery (ADISC) requests
+ * @rdata: The remote port that sent the ADISC request
+ * @sp:	   The sequence the ADISC request was on
+ * @in_fp: The ADISC request frame
  *
  * Locking Note:  Called with the lport and rport locks held.
  */
@@ -1058,10 +1066,10 @@ drop:
 }
 
 /**
- * fc_rport_recv_els_req() - handle a validated ELS request.
- * @lport: Fibre Channel local port
- * @sp: current sequence in the PLOGI exchange
- * @fp: response frame
+ * fc_rport_recv_els_req() - Handler for validated ELS requests
+ * @lport: The local port that received the ELS request
+ * @sp:	   The sequence that the ELS request was on
+ * @fp:	   The ELS request frame
  *
  * Handle incoming ELS requests that require port login.
  * The ELS opcode has already been validated by the caller.
@@ -1133,10 +1141,10 @@ reject:
 }
 
 /**
- * fc_rport_recv_req() - Handle a received ELS request from a rport
- * @sp: current sequence in the PLOGI exchange
- * @fp: response frame
- * @lport: Fibre Channel local port
+ * fc_rport_recv_req() - Handler for requests
+ * @sp:	   The sequence the request was on
+ * @fp:	   The request frame
+ * @lport: The local port that received the request
  *
  * Locking Note: Called with the lport lock held.
  */
@@ -1176,10 +1184,10 @@ void fc_rport_recv_req(struct fc_seq *sp, struct fc_frame *fp,
 }
 
 /**
- * fc_rport_recv_plogi_req() - Handle incoming Port Login (PLOGI) request
- * @lport: local port
- * @sp: current sequence in the PLOGI exchange
- * @fp: PLOGI request frame
+ * fc_rport_recv_plogi_req() - Handler for Port Login (PLOGI) requests
+ * @lport: The local port that received the PLOGI request
+ * @sp:	   The sequence that the PLOGI request was on
+ * @rx_fp: The PLOGI request frame
  *
  * Locking Note: The rport lock is held before calling this function.
  */
@@ -1297,10 +1305,10 @@ reject:
 }
 
 /**
- * fc_rport_recv_prli_req() - Handle incoming Process Login (PRLI) request
- * @rdata: private remote port data
- * @sp: current sequence in the PRLI exchange
- * @fp: PRLI request frame
+ * fc_rport_recv_prli_req() - Handler for process login (PRLI) requests
+ * @rdata: The remote port that sent the PRLI request
+ * @sp:	   The sequence that the PRLI was on
+ * @rx_fp: The PRLI request frame
  *
  * Locking Note: The rport lock is exected to be held before calling
  * this function.
@@ -1454,10 +1462,10 @@ static void fc_rport_recv_prli_req(struct fc_rport_priv *rdata,
 }
 
 /**
- * fc_rport_recv_prlo_req() - Handle incoming Process Logout (PRLO) request
- * @rdata: private remote port data
- * @sp: current sequence in the PRLO exchange
- * @fp: PRLO request frame
+ * fc_rport_recv_prlo_req() - Handler for process logout (PRLO) requests
+ * @rdata: The remote port that sent the PRLO request
+ * @sp:	   The sequence that the PRLO was on
+ * @fp:	   The PRLO request frame
  *
  * Locking Note: The rport lock is exected to be held before calling
  * this function.
@@ -1484,10 +1492,10 @@ static void fc_rport_recv_prlo_req(struct fc_rport_priv *rdata,
 }
 
 /**
- * fc_rport_recv_logo_req() - Handle incoming Logout (LOGO) request
- * @lport: local port.
- * @sp: current sequence in the LOGO exchange
- * @fp: LOGO request frame
+ * fc_rport_recv_logo_req() - Handler for logout (LOGO) requests
+ * @lport: The local port that received the LOGO request
+ * @sp:	   The sequence that the LOGO request was on
+ * @fp:	   The LOGO request frame
  *
  * Locking Note: The rport lock is exected to be held before calling
  * this function.
@@ -1514,7 +1522,7 @@ static void fc_rport_recv_logo_req(struct fc_lport *lport,
 
 		/*
 		 * If the remote port was created due to discovery,
-		 * log back in.  It may have seen a stale RSCN about us.
+		 * log back in.	 It may have seen a stale RSCN about us.
 		 */
 		if (rdata->rp_state != RPORT_ST_DELETE && rdata->disc_id)
 			fc_rport_enter_plogi(rdata);
@@ -1528,11 +1536,18 @@ static void fc_rport_recv_logo_req(struct fc_lport *lport,
 	fc_frame_free(fp);
 }
 
+/**
+ * fc_rport_flush_queue() - Flush the rport_event_queue
+ */
 static void fc_rport_flush_queue(void)
 {
 	flush_workqueue(rport_event_queue);
 }
 
+/**
+ * fc_rport_init() - Initialize the remote port layer for a local port
+ * @lport: The local port to initialize the remote port layer for
+ */
 int fc_rport_init(struct fc_lport *lport)
 {
 	if (!lport->tt.rport_lookup)
@@ -1560,7 +1575,10 @@ int fc_rport_init(struct fc_lport *lport)
 }
 EXPORT_SYMBOL(fc_rport_init);
 
-int fc_setup_rport(void)
+/**
+ * fc_setup_rport() - Initialize the rport_event_queue
+ */
+int fc_setup_rport()
 {
 	rport_event_queue = create_singlethread_workqueue("fc_rport_eq");
 	if (!rport_event_queue)
@@ -1568,15 +1586,22 @@ int fc_setup_rport(void)
 	return 0;
 }
 
-void fc_destroy_rport(void)
+/**
+ * fc_destroy_rport() - Destroy the rport_event_queue
+ */
+void fc_destroy_rport()
 {
 	destroy_workqueue(rport_event_queue);
 }
 
+/**
+ * fc_rport_terminate_io() - Stop all outstanding I/O on a remote port
+ * @rport: The remote port whose I/O should be terminated
+ */
 void fc_rport_terminate_io(struct fc_rport *rport)
 {
-	struct fc_rport_libfc_priv *rp = rport->dd_data;
-	struct fc_lport *lport = rp->local_port;
+	struct fc_rport_libfc_priv *rpriv = rport->dd_data;
+	struct fc_lport *lport = rpriv->local_port;
 
 	lport->tt.exch_mgr_reset(lport, 0, rport->port_id);
 	lport->tt.exch_mgr_reset(lport, rport->port_id, 0);
diff --git a/include/scsi/libfc.h b/include/scsi/libfc.h
index 3e2df39..b375dd5 100644
--- a/include/scsi/libfc.h
+++ b/include/scsi/libfc.h
@@ -55,8 +55,17 @@
 		p[2] = ((v) & 0xFF);		\
 	} while (0)
 
-/*
- * FC HBA status
+/**
+ * enum fc_lport_state - Local port states
+ * @LPORT_ST_DISABLED: Disabled
+ * @LPORT_ST_FLOGI:    Fabric login (FLOGI) sent
+ * @LPORT_ST_DNS:      Waiting for name server remote port to become ready
+ * @LPORT_ST_RPN_ID:   Register port name by ID (RPN_ID) sent
+ * @LPORT_ST_RFT_ID:   Register Fibre Channel types by ID (RFT_ID) sent
+ * @LPORT_ST_SCR:      State Change Register (SCR) sent
+ * @LPORT_ST_READY:    Ready for use
+ * @LPORT_ST_LOGO:     Local port logout (LOGO) sent
+ * @LPORT_ST_RESET:    Local port reset
  */
 enum fc_lport_state {
 	LPORT_ST_DISABLED = 0,
@@ -72,21 +81,38 @@ enum fc_lport_state {
 	LPORT_ST_RESET
 };
 
+/**
+ * enum fc_disc_event - Discovery events
+ * @DISC_EV_NONE:    No event
+ * @DISC_EV_SUCCESS: Discovery was successful
+ * @DISC_EV_FAILED:  Discovery failed
+ */
 enum fc_disc_event {
 	DISC_EV_NONE = 0,
 	DISC_EV_SUCCESS,
 	DISC_EV_FAILED
 };
 
+/**
+ * enum fc_rport_state - Remote port states
+ * @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:   Remote port logout (LOGO) sent
+ * @RPORT_ST_ADISC:  Discover Address sent
+ * @RPORT_ST_DELETE: Remote port being deleted
+ */
 enum fc_rport_state {
-	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 */
-	RPORT_ST_ADISC,		/* Discover Address sent */
-	RPORT_ST_DELETE,	/* port being deleted */
+	RPORT_ST_INIT,
+	RPORT_ST_PLOGI,
+	RPORT_ST_PRLI,
+	RPORT_ST_RTV,
+	RPORT_ST_READY,
+	RPORT_ST_LOGO,
+	RPORT_ST_ADISC,
+	RPORT_ST_DELETE,
 };
 
 /**
@@ -97,12 +123,20 @@ enum fc_rport_state {
  * @port_id:    Port ID of the discovered port
  */
 struct fc_disc_port {
-	struct fc_lport             *lp;
-	struct list_head            peers;
-	struct work_struct	    rport_work;
-	u32                         port_id;
+	struct fc_lport    *lp;
+	struct list_head   peers;
+	struct work_struct rport_work;
+	u32                port_id;
 };
 
+/**
+ * enum fc_rport_event - Remote port events
+ * @RPORT_EV_NONE:   No event
+ * @RPORT_EV_READY:  Remote port is ready for use
+ * @RPORT_EV_FAILED: State machine failed, remote port is not ready
+ * @RPORT_EV_STOP:   Remote port has been stopped
+ * @RPORT_EV_LOGO:   Remote port logout (LOGO) sent
+ */
 enum fc_rport_event {
 	RPORT_EV_NONE = 0,
 	RPORT_EV_READY,
@@ -113,6 +147,10 @@ enum fc_rport_event {
 
 struct fc_rport_priv;
 
+/**
+ * struct fc_rport_operations - Operations for a remote port
+ * @event_callback: Function to be called for remote port events
+ */
 struct fc_rport_operations {
 	void (*event_callback)(struct fc_lport *, struct fc_rport_priv *,
 			       enum fc_rport_event);
@@ -120,11 +158,11 @@ struct fc_rport_operations {
 
 /**
  * struct fc_rport_libfc_priv - libfc internal information about a remote port
- * @local_port: Fibre Channel host port instance
- * @rp_state: indicates READY for I/O or DELETE when blocked.
- * @flags: REC and RETRY supported flags
- * @e_d_tov: error detect timeout value (in msec)
- * @r_a_tov: resource allocation timeout value (in msec)
+ * @local_port: The associated local port
+ * @rp_state:   Indicates READY for I/O or DELETE when blocked
+ * @flags:      REC and RETRY supported flags
+ * @e_d_tov:    Error detect timeout value (in msec)
+ * @r_a_tov:    Resource allocation timeout value (in msec)
  */
 struct fc_rport_libfc_priv {
 	struct fc_lport		   *local_port;
@@ -137,47 +175,64 @@ struct fc_rport_libfc_priv {
 };
 
 /**
- * struct fc_rport_priv - libfc rport and discovery info about a remote port
- * @local_port: Fibre Channel host port instance
- * @rport: transport remote port
- * @kref: reference counter
- * @rp_state: state tracks progress of PLOGI, PRLI, and RTV exchanges
- * @ids: remote port identifiers and roles
- * @flags: REC and RETRY supported flags
- * @max_seq: maximum number of concurrent sequences
- * @disc_id: discovery identifier
- * @maxframe_size: maximum frame size
- * @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_priv - libfc remote port and discovery info
+ * @local_port:     The associated local port
+ * @rport:          The FC transport remote port
+ * @kref:           Reference counter
+ * @rp_state:       Enumeration that tracks progress of PLOGI, PRLI,
+ *                  and RTV exchanges
+ * @ids:            The remote port identifiers and roles
+ * @flags:          REC and RETRY supported flags
+ * @max_seq:        Maximum number of concurrent sequences
+ * @disc_id:        The discovery identifier
+ * @maxframe_size:  The maximum frame size
+ * @retries:        The retry count for the current state
+ * @e_d_tov:        Error detect timeout value (in msec)
+ * @r_a_tov:        Resource allocation timeout value (in msec)
+ * @rp_mutex:       The mutex that protects the remote port
+ * @retry_work:     Handle for retries
+ * @event_callback: Callback when READY, FAILED or LOGO states complete
  */
 struct fc_rport_priv {
-	struct fc_lport		   *local_port;
-	struct fc_rport		   *rport;
-	struct kref		   kref;
-	enum fc_rport_state        rp_state;
+	struct fc_lport		    *local_port;
+	struct fc_rport		    *rport;
+	struct kref		    kref;
+	enum fc_rport_state         rp_state;
 	struct fc_rport_identifiers ids;
-	u16			   flags;
-	u16		           max_seq;
-	u16			   disc_id;
-	u16			   maxframe_size;
-	unsigned int	           retries;
-	unsigned int	           e_d_tov;
-	unsigned int	           r_a_tov;
-	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;
-	u32			   supported_classes;
+	u16			    flags;
+	u16		            max_seq;
+	u16			    disc_id;
+	u16			    maxframe_size;
+	unsigned int	            retries;
+	unsigned int	            e_d_tov;
+	unsigned int	            r_a_tov;
+	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;
+	u32			    supported_classes;
 };
 
-/*
- * fcoe stats structure
+/**
+ * struct fcoe_dev_stats - fcoe stats structure
+ * @SecondsSinceLastReset: Seconds since the last reset
+ * @TxFrames:              Number of transmitted frames
+ * @TxWords:               Number of transmitted words
+ * @RxFrames:              Number of received frames
+ * @RxWords:               Number of received words
+ * @ErrorFrames:           Number of received error frames
+ * @DumpedFrames:          Number of dumped frames
+ * @LinkFailureCount:      Number of link failures
+ * @LossOfSignalCount:     Number for signal losses
+ * @InvalidTxWordCount:    Number of invalid transmitted words
+ * @InvalidCRCCount:       Number of invalid CRCs
+ * @InputRequests:         Number of input requests
+ * @OutputRequests:        Number of output requests
+ * @ControlRequests:       Number of control requests
+ * @InputMegabytes:        Number of received megabytes
+ * @OutputMegabytes:       Number of transmitted megabytes
  */
 struct fcoe_dev_stats {
 	u64		SecondsSinceLastReset;
@@ -198,10 +253,13 @@ struct fcoe_dev_stats {
 	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 - ELS data used for passing ELS specific responses
+ * @fp:     The ELS frame
+ * @reason: The reason for rejection
+ * @explan: The explaination of the rejection
+ *
+ * Mainly used by the exchange manager layer.
  */
 struct fc_seq_els_data {
 	struct fc_frame *fp;
@@ -209,77 +267,87 @@ struct fc_seq_els_data {
 	enum fc_els_rjt_explan explan;
 };
 
-/*
- * FCP request structure, one for each scsi cmd request
+/**
+ * struct fc_fcp_pkt - FCP request structure (one for each scsi_cmnd request)
+ * @lp:              The associated local port
+ * @state:           The state of the I/O
+ * @tgt_flags:       Target's flags
+ * @ref_cnt:         Reference count
+ * @scsi_pkt_lock:   Lock to protect the SCSI packet (must be taken before the
+ *                   host_lock if both are to be held at the same time)
+ * @cmd:             The SCSI command (set and clear with the host_lock held)
+ * @list:            Tracks queued commands (accessed with the host_lock held)
+ * @timer:           The command timer
+ * @tm_done:         Completion indicator
+ * @wait_for_comp:   Indicator to wait for completion of the I/O (in jiffies)
+ * @start_time:      Timestamp indicating the start of the I/O (in jiffies)
+ * @end_time:        Timestamp indicating the end of the I/O (in jiffies)
+ * @last_pkt_time:   Timestamp of the last frame received (in jiffies)
+ * @data_len:        The length of the data
+ * @cdb_cmd:         The CDB command
+ * @xfer_len:        The transfer length
+ * @xfer_ddp:        Indicates if this transfer used DDP (XID of the exchange
+ *                   will be set here if DDP was setup)
+ * @xfer_contig_end: The offset into the buffer if the buffer is contiguous
+ *                   (Tx and Rx)
+ * @max_payload:     The maximum payload size (in bytes)
+ * @io_status:       SCSI result (upper 24 bits)
+ * @cdb_status:      CDB status
+ * @status_code:     FCP I/O status
+ * @scsi_comp_flags: Completion flags (bit 3 Underrun bit 2: overrun)
+ * @req_flags:       Request flags (bit 0: read bit:1 write)
+ * @scsi_resid:      SCSI residule length
+ * @rport:           The remote port that the SCSI command is targeted at
+ * @seq_ptr:         The sequence that will carry the SCSI command
+ * @recov_retry:     Number of recovery retries
+ * @recov_seq:       The sequence for REC or SRR
  */
 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 */
+	/* Housekeeping information */
+	struct fc_lport   *lp;
+	u16		  state;
+	u16		  tgt_flags;
+	atomic_t	  ref_cnt;
+	spinlock_t	  scsi_pkt_lock;
+
+	/* SCSI I/O related information */
+	struct scsi_cmnd  *cmd;
+	struct list_head  list;
+
+	/* Timeout related information */
+	struct timer_list 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;
-	u16		xfer_ddp;	/* this xfer is ddped */
-	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 */
+	int	          wait_for_comp;
+	unsigned long	  start_time;
+	unsigned long	  end_time;
+	unsigned long	  last_pkt_time;
+
+	/* SCSI command and data transfer information */
+	u32		  data_len;
+
+	/* Transport related veriables */
+	struct fcp_cmnd   cdb_cmd;
+	size_t		  xfer_len;
+	u16		  xfer_ddp;
+	u32		  xfer_contig_end;
+	u16		  max_payload;
+
+	/* SCSI/FCP return status */
+	u32		  io_status;
+	u8		  cdb_status;
+	u8		  status_code;
+	u8		  scsi_comp_flags;
+	u32		  req_flags;
+	u32		  scsi_resid;
+
+	/* Associated structures */
+	struct fc_rport	  *rport;
+	struct fc_seq	  *seq_ptr;
+
+	/* Error Processing information */
+	u8		  recov_retry;
+	struct fc_seq	  *recov_seq;
 };
-/*
- * FC_FCP HELPER FUNCTIONS
- *****************************/
-static inline bool fc_fcp_is_read(const struct fc_fcp_pkt *fsp)
-{
-	if (fsp && fsp->cmd)
-		return fsp->cmd->sc_data_direction == DMA_FROM_DEVICE;
-	return false;
-}
 
 /*
  * Structure and function definitions for managing Fibre Channel Exchanges
@@ -292,23 +360,51 @@ static inline bool fc_fcp_is_read(const struct fc_fcp_pkt *fsp)
 
 struct fc_exch_mgr;
 struct fc_exch_mgr_anchor;
-extern u16	fc_cpu_mask;	/* cpu mask for possible cpus */
+extern u16 fc_cpu_mask;	/* cpu mask for possible cpus */
 
-/*
- * Sequence.
+/**
+ * struct fc_seq - FC sequence
+ * @id:       The sequence ID
+ * @ssb_stat: Status flags for the sequence status block (SSB)
+ * @cnt:      Number of frames sent so far
+ * @rec_data: FC-4 value for REC
  */
 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 */
+	u8  id;
+	u16 ssb_stat;
+	u16 cnt;
+	u32 rec_data;
 };
 
 #define FC_EX_DONE		(1 << 0) /* ep is completed */
 #define FC_EX_RST_CLEANUP	(1 << 1) /* reset is forcing completion */
 
-/*
- * Exchange.
+/**
+ * struct fc_exch - Fibre Channel Exchange
+ * @em:           Exchange manager
+ * @pool:         Exchange pool
+ * @state:        The exchange's state
+ * @xid:          The exchange ID
+ * @ex_list:      Handle used by the EM to track free exchanges
+ * @ex_lock:      Lock that protects the exchange
+ * @ex_refcnt:    Reference count
+ * @timeout_work: Handle for timeout handler
+ * @lp:           The local port that this exchange is on
+ * @oxid:         Originator's exchange ID
+ * @rxid:         Responder's exchange ID
+ * @oid:          Originator's FCID
+ * @sid:          Source FCID
+ * @did:          Destination FCID
+ * @esb_stat:     ESB exchange status
+ * @r_a_tov:      Resouce allocation time out value (in msecs)
+ * @seq_id:       The next sequence ID to use
+ * @f_ctl:        F_CTL flags for the sequence
+ * @fh_type:      The frame type
+ * @class:        The class of service
+ * @seq:          The sequence in use on this exchange
+ * @resp:         Callback for responses on this exchange
+ * @destructor:   Called when destroying the exchange
+ * @arg:          Passed as a void pointer to the resp() callback
  *
  * Locking notes: The ex_lock protects following items:
  *	state, esb_stat, f_ctl, seq.ssb_stat
@@ -316,76 +412,59 @@ struct fc_seq {
  *	sequence allocation
  */
 struct fc_exch {
-	struct fc_exch_mgr *em;		/* exchange manager */
-	struct fc_exch_pool *pool;	/* per cpu exches pool */
-	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;
+	struct fc_exch_mgr  *em;
+	struct fc_exch_pool *pool;
+	u32		    state;
+	u16		    xid;
+	struct list_head    ex_list;
+	spinlock_t	    ex_lock;
+	atomic_t	    ex_refcnt;
+	struct delayed_work timeout_work;
+	struct fc_lport	    *lp;
+	u16		    oxid;
+	u16		    rxid;
+	u32		    oid;
+	u32		    sid;
+	u32		    did;
+	u32		    esb_stat;
+	u32		    r_a_tov;
+	u8		    seq_id;
+	u32		    f_ctl;
+	u8		    fh_type;
+	enum fc_class	    class;
+	struct fc_seq	    seq;
+
+	void		    (*resp)(struct fc_seq *, struct fc_frame *, void *);
+	void		    *arg;
+
+	void		    (*destructor)(struct fc_seq *, void *);
+
 };
 #define	fc_seq_exch(sp) container_of(sp, struct fc_exch, seq)
 
-struct libfc_function_template {
 
+struct libfc_function_template {
 	/*
 	 * Interface to send a FC frame
 	 *
 	 * STATUS: REQUIRED
 	 */
-	int (*frame_send)(struct fc_lport *lp, struct fc_frame *fp);
+	int (*frame_send)(struct fc_lport *, struct fc_frame *);
 
 	/*
 	 * Interface to send ELS/CT frames
 	 *
 	 * STATUS: OPTIONAL
 	 */
-	struct fc_seq *(*elsct_send)(struct fc_lport *lport,
-				     u32 did,
-				     struct fc_frame *fp,
-				     unsigned int op,
+	struct fc_seq *(*elsct_send)(struct fc_lport *, u32 did,
+				     struct fc_frame *, unsigned int op,
 				     void (*resp)(struct fc_seq *,
-					     struct fc_frame *fp,
-					     void *arg),
+					     struct fc_frame *, void *arg),
 				     void *arg, u32 timer_msec);
 
 	/*
 	 * 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
@@ -406,14 +485,13 @@ struct libfc_function_template {
 	 *
 	 * STATUS: OPTIONAL
 	 */
-	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);
+	struct fc_seq *(*exch_seq_send)(struct fc_lport *, struct fc_frame *,
+					void (*resp)(struct fc_seq *,
+						     struct fc_frame *,
+						     void *),
+					void (*destructor)(struct fc_seq *,
+							   void *),
+					void *, unsigned int timer_msec);
 
 	/*
 	 * Sets up the DDP context for a given exchange id on the given
@@ -421,22 +499,22 @@ struct libfc_function_template {
 	 *
 	 * STATUS: OPTIONAL
 	 */
-	int (*ddp_setup)(struct fc_lport *lp, u16 xid,
-			 struct scatterlist *sgl, unsigned int sgc);
+	int (*ddp_setup)(struct fc_lport *, u16, struct scatterlist *,
+			 unsigned int);
 	/*
 	 * Completes the DDP transfer and returns the length of data DDPed
 	 * for the given exchange id.
 	 *
 	 * STATUS: OPTIONAL
 	 */
-	int (*ddp_done)(struct fc_lport *lp, u16 xid);
+	int (*ddp_done)(struct fc_lport *, u16);
 	/*
 	 * Send a frame using an existing sequence and exchange.
 	 *
 	 * STATUS: OPTIONAL
 	 */
-	int (*seq_send)(struct fc_lport *lp, struct fc_seq *sp,
-			struct fc_frame *fp);
+	int (*seq_send)(struct fc_lport *, struct fc_seq *,
+			struct fc_frame *);
 
 	/*
 	 * Send an ELS response using infomation from a previous
@@ -444,8 +522,8 @@ struct libfc_function_template {
 	 *
 	 * STATUS: OPTIONAL
 	 */
-	void (*seq_els_rsp_send)(struct fc_seq *sp, enum fc_els_cmd els_cmd,
-				 struct fc_seq_els_data *els_data);
+	void (*seq_els_rsp_send)(struct fc_seq *, enum fc_els_cmd,
+				 struct fc_seq_els_data *);
 
 	/*
 	 * Abort an exchange and sequence. Generally called because of a
@@ -457,7 +535,7 @@ struct libfc_function_template {
 	 *
 	 * STATUS: OPTIONAL
 	 */
-	int (*seq_exch_abort)(const struct fc_seq *req_sp,
+	int (*seq_exch_abort)(const struct fc_seq *,
 			      unsigned int timer_msec);
 
 	/*
@@ -466,14 +544,14 @@ struct libfc_function_template {
 	 *
 	 * STATUS: OPTIONAL
 	 */
-	void (*exch_done)(struct fc_seq *sp);
+	void (*exch_done)(struct fc_seq *);
 
 	/*
 	 * Start a new sequence on the same exchange/sequence tuple.
 	 *
 	 * STATUS: OPTIONAL
 	 */
-	struct fc_seq *(*seq_start_next)(struct fc_seq *sp);
+	struct fc_seq *(*seq_start_next)(struct fc_seq *);
 
 	/*
 	 * Reset an exchange manager, completing all sequences and exchanges.
@@ -482,8 +560,7 @@ struct libfc_function_template {
 	 *
 	 * STATUS: OPTIONAL
 	 */
-	void (*exch_mgr_reset)(struct fc_lport *,
-			       u32 s_id, u32 d_id);
+	void (*exch_mgr_reset)(struct fc_lport *, u32 s_id, u32 d_id);
 
 	/*
 	 * Flush the rport work queue. Generally used before shutdown.
@@ -497,8 +574,8 @@ struct libfc_function_template {
 	 *
 	 * STATUS: OPTIONAL
 	 */
-	void (*lport_recv)(struct fc_lport *lp, struct fc_seq *sp,
-			   struct fc_frame *fp);
+	void (*lport_recv)(struct fc_lport *, struct fc_seq *,
+			   struct fc_frame *);
 
 	/*
 	 * Reset the local port.
@@ -564,31 +641,31 @@ struct libfc_function_template {
 	 *
 	 * STATUS: OPTIONAL
 	 */
-	int (*fcp_cmd_send)(struct fc_lport *lp, struct fc_fcp_pkt *fsp,
-			    void (*resp)(struct fc_seq *, struct fc_frame *fp,
-					 void *arg));
+	int (*fcp_cmd_send)(struct fc_lport *, struct fc_fcp_pkt *,
+			    void (*resp)(struct fc_seq *, struct fc_frame *,
+					 void *));
 
 	/*
 	 * Cleanup the FCP layer, used durring link down and reset
 	 *
 	 * STATUS: OPTIONAL
 	 */
-	void (*fcp_cleanup)(struct fc_lport *lp);
+	void (*fcp_cleanup)(struct fc_lport *);
 
 	/*
 	 * Abort all I/O on a local port
 	 *
 	 * STATUS: OPTIONAL
 	 */
-	void (*fcp_abort_io)(struct fc_lport *lp);
+	void (*fcp_abort_io)(struct fc_lport *);
 
 	/*
 	 * Receive a request for the discovery layer.
 	 *
 	 * STATUS: OPTIONAL
 	 */
-	void (*disc_recv_req)(struct fc_seq *,
-			      struct fc_frame *, struct fc_lport *);
+	void (*disc_recv_req)(struct fc_seq *, struct fc_frame *,
+			      struct fc_lport *);
 
 	/*
 	 * Start discovery for a local port.
@@ -617,134 +694,226 @@ struct libfc_function_template {
 	void (*disc_stop_final) (struct fc_lport *);
 };
 
-/* information used by the discovery layer */
+/**
+ * struct fc_disc - Discovery context
+ * @retry_count:   Number of retries
+ * @pending:       1 if discovery is pending, 0 if not
+ * @requesting:    1 if discovery has been requested, 0 if not
+ * @seq_count:     Number of sequences used for discovery
+ * @buf_len:       Length of the discovery buffer
+ * @disc_id:       Discovery ID
+ * @rports:        List of discovered remote ports
+ * @lport:         The local port that discovery is for
+ * @disc_mutex:    Mutex that protects the discovery context
+ * @partial_buf:   Partial name buffer (if names are returned
+ *                 in multiple frames)
+ * @disc_work:     handle for delayed work context
+ * @disc_callback: Callback routine called when discovery completes
+ */
 struct fc_disc {
-	unsigned char		retry_count;
-	unsigned char		pending;
-	unsigned char		requested;
-	unsigned short		seq_count;
-	unsigned char		buf_len;
-	u16			disc_id;
+	unsigned char         retry_count;
+	unsigned char         pending;
+	unsigned char         requested;
+	unsigned short        seq_count;
+	unsigned char         buf_len;
+	u16                   disc_id;
+
+	struct list_head      rports;
+	struct fc_lport	      *lport;
+	struct mutex	      disc_mutex;
+	struct fc_gpn_ft_resp partial_buf;
+	struct delayed_work   disc_work;
 
 	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 - Local port
+ * @host:                  The SCSI host associated with a local port
+ * @ema_list:              Exchange manager anchor list
+ * @dns_rdata:             The directory server remote port
+ * @ptp_rdata:             Point to point remote port
+ * @scsi_priv:             FCP layer internal data
+ * @disc:                  Discovery context
+ * @vports:                Child vports if N_Port
+ * @vport:                 Parent vport if VN_Port
+ * @tt:                    Libfc function template
+ * @link_up:               Link state (1 = link up, 0 = link down)
+ * @qfull:                 Queue state (1 queue is full, 0 queue is not full)
+ * @state:                 Identifies the state
+ * @boot_time:             Timestamp indicating when the local port came online
+ * @host_stats:            SCSI host statistics
+ * @dev_stats:             FCoE device stats (TODO: libfc should not be
+ *                         FCoE aware)
+ * @retry_count:           Number of retries in the current state
+ * @wwpn:                  World Wide Port Name
+ * @wwnn:                  World Wide Node Name
+ * @service_params:        Common service parameters
+ * @e_d_tov:               Error detection timeout value
+ * @r_a_tov:               Resouce allocation timeout value
+ * @rnid_gen:              RNID information
+ * @sg_supp:               Indicates if scatter gather is supported
+ * @seq_offload:           Indicates if sequence offload is supported
+ * @crc_offload:           Indicates if CRC offload is supported
+ * @lro_enabled:           Indicates if large receive offload is supported
+ * @does_npiv:             Supports multiple vports
+ * @npiv_enabled:          Switch/fabric allows NPIV
+ * @mfs:                   The maximum Fibre Channel payload size
+ * @max_retry_count:       The maximum retry attempts
+ * @max_rport_retry_count: The maximum remote port retry attempts
+ * @lro_xid:               The maximum XID for LRO
+ * @lso_max:               The maximum large offload send size
+ * @fcts:                  FC-4 type mask
+ * @lp_mutex:              Mutex to protect the local port
+ * @list:                  Handle for list of local ports
+ * @retry_work:            Handle to local port for delayed retry context
+ * @disc_work:             Handle to local port for discovery layer
+ */
 struct fc_lport {
-	struct list_head list;
-
 	/* Associations */
-	struct Scsi_Host	*host;
-	struct list_head	ema_list;
-	struct list_head	vports;		/* child vports if N_Port */
-	struct fc_vport		*vport;		/* parent vport if VN_Port */
-	struct fc_rport_priv	*dns_rp;
-	struct fc_rport_priv	*ptp_rp;
-	void			*scsi_priv;
-	struct fc_disc          disc;
+	struct Scsi_Host	       *host;
+	struct list_head	       ema_list;
+	struct fc_rport_priv	       *dns_rdata;
+	struct fc_rport_priv	       *ptp_rdata;
+	void			       *scsi_priv;
+	struct fc_disc                 disc;
+
+	/* Virtual port information */
+	struct list_head	       vports;
+	struct fc_vport		       *vport;
 
 	/* Operational Information */
 	struct libfc_function_template tt;
-	u8			link_up;
-	u8			qfull;
-	enum fc_lport_state	state;
-	unsigned long		boot_time;
-
-	struct fc_host_statistics host_stats;
-	struct fcoe_dev_stats	*dev_stats;
-
-	u64			wwpn;
-	u64			wwnn;
-	u8			retry_count;
+	u8			       link_up;
+	u8			       qfull;
+	enum fc_lport_state	       state;
+	unsigned long		       boot_time;
+	struct fc_host_statistics      host_stats;
+	struct fcoe_dev_stats	       *dev_stats;
+	u8			       retry_count;
+
+	/* Fabric information */
+	u64			       wwpn;
+	u64			       wwnn;
+	unsigned int		       service_params;
+	unsigned int		       e_d_tov;
+	unsigned int		       r_a_tov;
+	struct fc_els_rnid_gen	       rnid_gen;
 
 	/* 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			does_npiv:1;	/* supports multiple vports */
-	u32			npiv_enabled:1;	/* switch/fabric allows NPIV */
-	u32			mfs;	        /* max FC payload size */
-	unsigned int		service_params;
-	unsigned int		e_d_tov;
-	unsigned int		r_a_tov;
-	u8			max_retry_count;
-	u8			max_rport_retry_count;
-	u16			link_speed;
-	u16			link_supported_speeds;
-	u16			lro_xid;	/* max xid for fcoe lro */
-	unsigned int		lso_max;	/* max large send size */
-	struct fc_ns_fts	fcts;	        /* FC-4 type masks */
-	struct fc_els_rnid_gen	rnid_gen;	/* RNID information */
-
-	/* Semaphores */
-	struct mutex lp_mutex;
+	u32			       sg_supp:1;
+	u32			       seq_offload:1;
+	u32			       crc_offload:1;
+	u32			       lro_enabled:1;
+	u32			       does_npiv:1;
+	u32			       npiv_enabled:1;
+	u32			       mfs;
+	u8			       max_retry_count;
+	u8			       max_rport_retry_count;
+	u16			       link_speed;
+	u16			       link_supported_speeds;
+	u16			       lro_xid;
+	unsigned int		       lso_max;
+	struct fc_ns_fts	       fcts;
 
 	/* Miscellaneous */
-	struct delayed_work	retry_work;
-	struct delayed_work	disc_work;
+	struct mutex                   lp_mutex;
+	struct list_head               list;
+	struct delayed_work	       retry_work;
+	struct delayed_work	       disc_work;
 };
 
 /*
  * FC_LPORT HELPER FUNCTIONS
  *****************************/
-static inline int fc_lport_test_ready(struct fc_lport *lp)
+
+/**
+ * fc_lport_test_ready() - Determine if a local port is in the READY state
+ * @lport: The local port to test
+ */
+static inline int fc_lport_test_ready(struct fc_lport *lport)
 {
-	return lp->state == LPORT_ST_READY;
+	return lport->state == LPORT_ST_READY;
 }
 
-static inline void fc_set_wwnn(struct fc_lport *lp, u64 wwnn)
+/**
+ * fc_set_wwnn() - Set the World Wide Node Name of a local port
+ * @lport: The local port whose WWNN is to be set
+ * @wwnn:  The new WWNN
+ */
+static inline void fc_set_wwnn(struct fc_lport *lport, u64 wwnn)
 {
-	lp->wwnn = wwnn;
+	lport->wwnn = wwnn;
 }
 
-static inline void fc_set_wwpn(struct fc_lport *lp, u64 wwnn)
+/**
+ * fc_set_wwpn() - Set the World Wide Port Name of a local port
+ * @lport: The local port whose WWPN is to be set
+ * @wwnn:  The new WWPN
+ */
+static inline void fc_set_wwpn(struct fc_lport *lport, u64 wwnn)
 {
-	lp->wwpn = wwnn;
+	lport->wwpn = wwnn;
 }
 
-static inline void fc_lport_state_enter(struct fc_lport *lp,
+/**
+ * fc_lport_state_enter() - Change a local port's state
+ * @lport: The local port whose state is to change
+ * @state: The new state
+ */
+static inline void fc_lport_state_enter(struct fc_lport *lport,
 					enum fc_lport_state state)
 {
-	if (state != lp->state)
-		lp->retry_count = 0;
-	lp->state = state;
+	if (state != lport->state)
+		lport->retry_count = 0;
+	lport->state = state;
 }
 
-static inline int fc_lport_init_stats(struct fc_lport *lp)
+/**
+ * fc_lport_init_stats() - Allocate per-CPU statistics for a local port
+ * @lport: The local port whose statistics are to be initialized
+ */
+static inline int fc_lport_init_stats(struct fc_lport *lport)
 {
-	/* allocate per cpu stats block */
-	lp->dev_stats = alloc_percpu(struct fcoe_dev_stats);
-	if (!lp->dev_stats)
+	lport->dev_stats = alloc_percpu(struct fcoe_dev_stats);
+	if (!lport->dev_stats)
 		return -ENOMEM;
 	return 0;
 }
 
-static inline void fc_lport_free_stats(struct fc_lport *lp)
+/**
+ * fc_lport_free_stats() - Free memory for a local port's statistics
+ * @lport: The local port whose statistics are to be freed
+ */
+static inline void fc_lport_free_stats(struct fc_lport *lport)
 {
-	free_percpu(lp->dev_stats);
+	free_percpu(lport->dev_stats);
 }
 
-static inline struct fcoe_dev_stats *fc_lport_get_stats(struct fc_lport *lp)
+/**
+ * fc_lport_get_stats() - Get a local port's statistics
+ * @lport: The local port whose statistics are to be retreived
+ */
+static inline struct fcoe_dev_stats *fc_lport_get_stats(struct fc_lport *lport)
 {
-	return per_cpu_ptr(lp->dev_stats, smp_processor_id());
+	return per_cpu_ptr(lport->dev_stats, smp_processor_id());
 }
 
-static inline void *lport_priv(const struct fc_lport *lp)
+/**
+ * lport_priv() - Return the private data from a local port
+ * @lport: The local port whose private data is to be retreived
+ */
+static inline void *lport_priv(const struct fc_lport *lport)
 {
-	return (void *)(lp + 1);
+	return (void *)(lport + 1);
 }
 
 /**
- * libfc_host_alloc() - Allocate a Scsi_Host with room for the fc_lport
- * @sht: ptr to the scsi host templ
- * @priv_size: size of private data after fc_lport
+ * libfc_host_alloc() - Allocate a Scsi_Host with room for a local port and
+ *                      LLD private data
+ * @sht:       The SCSI host template
+ * @priv_size: Size of private data
  *
  * Returns: libfc lport
  */
@@ -765,156 +934,74 @@ libfc_host_alloc(struct scsi_host_template *sht, int priv_size)
 }
 
 /*
- * LOCAL PORT LAYER
+ * FC_FCP HELPER FUNCTIONS
  *****************************/
-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);
+static inline bool fc_fcp_is_read(const struct fc_fcp_pkt *fsp)
+{
+	if (fsp && fsp->cmd)
+		return fsp->cmd->sc_data_direction == DMA_FROM_DEVICE;
+	return false;
+}
 
 /*
- * The link is up for the given local port.
- */
+ * LOCAL PORT LAYER
+ *****************************/
+int fc_lport_init(struct fc_lport *);
+int fc_lport_destroy(struct fc_lport *);
+int fc_fabric_logoff(struct fc_lport *);
+int fc_fabric_login(struct fc_lport *);
 void __fc_linkup(struct fc_lport *);
 void fc_linkup(struct fc_lport *);
-
-/*
- * Link is down for the given local port.
- */
 void __fc_linkdown(struct fc_lport *);
 void fc_linkdown(struct fc_lport *);
-
-/*
- * Configure the local port.
- */
+void fc_vport_setlink(struct fc_lport *);
+void fc_vports_linkchange(struct fc_lport *);
 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);
-
-/*
- * Allocate a new lport struct for an NPIV VN_Port
- */
-struct fc_lport *libfc_vport_create(struct fc_vport *vport, int privsize);
-
-/*
- * Find an NPIV VN_Port by port ID
- */
-struct fc_lport *fc_vport_id_lookup(struct fc_lport *n_port, u32 port_id);
-
-/*
- * NPIV VN_Port link state management
- */
-void fc_vport_setlink(struct fc_lport *vn_port);
-void fc_vports_linkchange(struct fc_lport *n_port);
-
-/*
- * Issue fc pass-thru request via bsg interface
- */
-int fc_lport_bsg_request(struct fc_bsg_job *job);
-
+int fc_set_mfs(struct fc_lport *, u32 mfs);
+struct fc_lport *libfc_vport_create(struct fc_vport *, int privsize);
+struct fc_lport *fc_vport_id_lookup(struct fc_lport *, u32 port_id);
+int fc_lport_bsg_request(struct fc_bsg_job *);
 
 /*
  * REMOTE PORT LAYER
  *****************************/
-int fc_rport_init(struct fc_lport *lp);
-void fc_rport_terminate_io(struct fc_rport *rp);
+int fc_rport_init(struct fc_lport *);
+void fc_rport_terminate_io(struct fc_rport *);
 
 /*
  * DISCOVERY LAYER
  *****************************/
-int fc_disc_init(struct fc_lport *lp);
-
+int fc_disc_init(struct fc_lport *);
 
 /*
- * SCSI LAYER
+ * FCP LAYER
  *****************************/
-/*
- * Initialize the SCSI block of libfc
- */
 int fc_fcp_init(struct fc_lport *);
+void fc_fcp_destroy(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,
+ * SCSI INTERACTION LAYER
+ *****************************/
+int fc_queuecommand(struct scsi_cmnd *,
 		    void (*done)(struct scsi_cmnd *));
+int fc_eh_abort(struct scsi_cmnd *);
+int fc_eh_device_reset(struct scsi_cmnd *);
+int fc_eh_host_reset(struct scsi_cmnd *);
+int fc_slave_alloc(struct scsi_device *);
+int fc_change_queue_depth(struct scsi_device *, int qdepth, int reason);
+int fc_change_queue_type(struct scsi_device *, int tag_type);
 
-/*
- * 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, int reason);
-
-/*
- * 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);
-struct fc_seq *fc_elsct_send(struct fc_lport *lport,
-				    u32 did,
-				    struct fc_frame *fp,
+int fc_elsct_init(struct fc_lport *);
+struct fc_seq *fc_elsct_send(struct fc_lport *, u32 did,
+				    struct fc_frame *,
 				    unsigned int op,
 				    void (*resp)(struct fc_seq *,
-						 struct fc_frame *fp,
+						 struct fc_frame *,
 						 void *arg),
 				    void *arg, u32 timer_msec);
 void fc_lport_flogi_resp(struct fc_seq *, struct fc_frame *, void *);
@@ -924,90 +1011,26 @@ void fc_lport_logo_resp(struct fc_seq *, struct fc_frame *, void *);
 /*
  * EXCHANGE MANAGER LAYER
  *****************************/
-/*
- * Initializes Exchange Manager related
- * function pointers in struct libfc_function_template.
- */
-int fc_exch_init(struct fc_lport *lp);
-
-/*
- * Adds Exchange Manager (EM) mp to lport.
- *
- * Adds specified mp to lport using struct fc_exch_mgr_anchor,
- * the struct fc_exch_mgr_anchor allows same EM sharing by
- * more than one lport with their specified match function,
- * the match function is used in allocating exchange from
- * added mp.
- */
-struct fc_exch_mgr_anchor *fc_exch_mgr_add(struct fc_lport *lport,
-					   struct fc_exch_mgr *mp,
+int fc_exch_init(struct fc_lport *);
+struct fc_exch_mgr_anchor *fc_exch_mgr_add(struct fc_lport *,
+					   struct fc_exch_mgr *,
 					   bool (*match)(struct fc_frame *));
-
-/*
- * Deletes Exchange Manager (EM) from lport by removing
- * its anchor ema from lport.
- *
- * If removed anchor ema was the last user of its associated EM
- * then also destroys associated EM.
- */
-void fc_exch_mgr_del(struct fc_exch_mgr_anchor *ema);
-
-/*
- * Clone an exchange manager list, getting reference holds for each EM.
- * This is for use with NPIV and sharing the X_ID space between VN_Ports.
- */
+void fc_exch_mgr_del(struct fc_exch_mgr_anchor *);
 int fc_exch_mgr_list_clone(struct fc_lport *src, struct fc_lport *dst);
-
-/*
- * 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.
- *
- * Specified match function is used in allocating exchanges
- * from newly allocated EM.
- */
-struct fc_exch_mgr *fc_exch_mgr_alloc(struct fc_lport *lp,
-				      enum fc_class class,
-				      u16 min_xid,
-				      u16 max_xid,
+struct fc_exch_mgr *fc_exch_mgr_alloc(struct fc_lport *, enum fc_class class,
+				      u16 min_xid, u16 max_xid,
 				      bool (*match)(struct fc_frame *));
-
-/*
- * Free all exchange managers of a lport.
- */
-void fc_exch_mgr_free(struct fc_lport *lport);
-
-/*
- * Receive a frame on specified local port and exchange manager.
- */
-void fc_exch_recv(struct fc_lport *lp, struct fc_frame *fp);
-
-/*
- * Reset all EMs of a lport, releasing its all sequences and
- * exchanges. If sid is non-zero, then reset only exchanges
- * we sourced from that FID. If did is non-zero, reset only
- * exchanges destined to that FID.
- */
+void fc_exch_mgr_free(struct fc_lport *);
+void fc_exch_recv(struct fc_lport *, struct fc_frame *);
 void fc_exch_mgr_reset(struct fc_lport *, 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);
+void fc_get_host_speed(struct Scsi_Host *);
+void fc_get_host_port_type(struct Scsi_Host *);
+void fc_get_host_port_state(struct Scsi_Host *);
+void fc_set_rport_loss_tmo(struct fc_rport *, u32 timeout);
 struct fc_host_statistics *fc_get_host_stats(struct Scsi_Host *);
 
 #endif /* _LIBFC_H_ */

[PATCH 30/35] libfcoe: formatting and comment cleanups

[Robert Love]

Ensures that there are kernel-doc style comments for all
routines and structures.

There were also a few instances of fc_lport's named 'lp'
which were switched to 'lport' as per the libfc/libfcoe/fcoe
naming convention.

Also, emacs 'indent-region' and 'tabify' were ran on libfcoe.c.

Signed-off-by: Robert Love <robert.w.love@intel.com>
---

 drivers/scsi/fcoe/libfcoe.c |  216 ++++++++++++++++++++++---------------------
 include/scsi/libfcoe.h      |   84 ++++++++---------
 2 files changed, 153 insertions(+), 147 deletions(-)

diff --git a/drivers/scsi/fcoe/libfcoe.c b/drivers/scsi/fcoe/libfcoe.c
index dc3a451..a563c99 100644
--- a/drivers/scsi/fcoe/libfcoe.c
+++ b/drivers/scsi/fcoe/libfcoe.c
@@ -60,15 +60,15 @@ unsigned int libfcoe_debug_logging;
 module_param_named(debug_logging, libfcoe_debug_logging, int, S_IRUGO|S_IWUSR);
 MODULE_PARM_DESC(debug_logging, "a bit mask of logging levels");
 
-#define LIBFCOE_LOGGING     0x01 /* General logging, not categorized */
+#define LIBFCOE_LOGGING	    0x01 /* General logging, not categorized */
 #define LIBFCOE_FIP_LOGGING 0x02 /* FIP logging */
 
-#define LIBFCOE_CHECK_LOGGING(LEVEL, CMD)				\
-do {                                                            	\
-	if (unlikely(libfcoe_debug_logging & LEVEL))			\
-		do {							\
-			CMD;						\
-		} while (0);						\
+#define LIBFCOE_CHECK_LOGGING(LEVEL, CMD)		\
+do {							\
+	if (unlikely(libfcoe_debug_logging & LEVEL))	\
+		do {					\
+			CMD;				\
+		} while (0);				\
 } while (0)
 
 #define LIBFCOE_DBG(fmt, args...)					\
@@ -79,7 +79,10 @@ do {                                                            	\
 	LIBFCOE_CHECK_LOGGING(LIBFCOE_FIP_LOGGING,			\
 			      printk(KERN_INFO "fip: " fmt, ##args);)
 
-/*
+/**
+ * fcoe_ctlr_mtu_valid() - Check if a FCF's MTU is valid
+ * @fcf: The FCF to check
+ *
  * Return non-zero if FCF fcoe_size has been validated.
  */
 static inline int fcoe_ctlr_mtu_valid(const struct fcoe_fcf *fcf)
@@ -87,7 +90,10 @@ static inline int fcoe_ctlr_mtu_valid(const struct fcoe_fcf *fcf)
 	return (fcf->flags & FIP_FL_SOL) != 0;
 }
 
-/*
+/**
+ * fcoe_ctlr_fcf_usable() - Check if a FCF is usable
+ * @fcf: The FCF to check
+ *
  * Return non-zero if the FCF is usable.
  */
 static inline int fcoe_ctlr_fcf_usable(struct fcoe_fcf *fcf)
@@ -98,8 +104,8 @@ static inline int fcoe_ctlr_fcf_usable(struct fcoe_fcf *fcf)
 }
 
 /**
- * fcoe_ctlr_init() - Initialize the FCoE Controller instance.
- * @fip:	FCoE controller.
+ * fcoe_ctlr_init() - Initialize the FCoE Controller instance
+ * @fip: The FCoE controller to initialize
  */
 void fcoe_ctlr_init(struct fcoe_ctlr *fip)
 {
@@ -115,8 +121,8 @@ void fcoe_ctlr_init(struct fcoe_ctlr *fip)
 EXPORT_SYMBOL(fcoe_ctlr_init);
 
 /**
- * fcoe_ctlr_reset_fcfs() - Reset and free all FCFs for a controller.
- * @fip:	FCoE controller.
+ * fcoe_ctlr_reset_fcfs() - Reset and free all FCFs for a controller
+ * @fip: The FCoE controller whose FCFs are to be reset
  *
  * Called with &fcoe_ctlr lock held.
  */
@@ -135,8 +141,8 @@ static void fcoe_ctlr_reset_fcfs(struct fcoe_ctlr *fip)
 }
 
 /**
- * fcoe_ctlr_destroy() - Disable and tear-down the FCoE controller.
- * @fip:	FCoE controller.
+ * fcoe_ctlr_destroy() - Disable and tear down a FCoE controller
+ * @fip: The FCoE controller to tear down
  *
  * This is called by FCoE drivers before freeing the &fcoe_ctlr.
  *
@@ -163,8 +169,8 @@ void fcoe_ctlr_destroy(struct fcoe_ctlr *fip)
 EXPORT_SYMBOL(fcoe_ctlr_destroy);
 
 /**
- * fcoe_ctlr_fcoe_size() - Return the maximum FCoE size required for VN_Port.
- * @fip:	FCoE controller.
+ * fcoe_ctlr_fcoe_size() - Return the maximum FCoE size required for VN_Port
+ * @fip: The FCoE controller to get the maximum FCoE size from
  *
  * Returns the maximum packet size including the FCoE header and trailer,
  * but not including any Ethernet or VLAN headers.
@@ -181,9 +187,9 @@ static inline u32 fcoe_ctlr_fcoe_size(struct fcoe_ctlr *fip)
 }
 
 /**
- * fcoe_ctlr_solicit() - Send a solicitation.
- * @fip:	FCoE controller.
- * @fcf:	Destination FCF.  If NULL, a multicast solicitation is sent.
+ * fcoe_ctlr_solicit() - Send a FIP solicitation
+ * @fip: The FCoE controller to send the solicitation on
+ * @fcf: The destination FCF (if NULL, a multicast solicitation is sent)
  */
 static void fcoe_ctlr_solicit(struct fcoe_ctlr *fip, struct fcoe_fcf *fcf)
 {
@@ -242,8 +248,8 @@ static void fcoe_ctlr_solicit(struct fcoe_ctlr *fip, struct fcoe_fcf *fcf)
 }
 
 /**
- * fcoe_ctlr_link_up() - Start FCoE controller.
- * @fip:	FCoE controller.
+ * fcoe_ctlr_link_up() - Start FCoE controller
+ * @fip: The FCoE controller to start
  *
  * Called from the LLD when the network link is ready.
  */
@@ -269,15 +275,15 @@ void fcoe_ctlr_link_up(struct fcoe_ctlr *fip)
 EXPORT_SYMBOL(fcoe_ctlr_link_up);
 
 /**
- * fcoe_ctlr_reset() - Reset FIP.
- * @fip:	FCoE controller.
- * @new_state:	FIP state to be entered.
+ * fcoe_ctlr_reset() - Reset a FCoE controller
+ * @fip:       The FCoE controller to reset
+ * @new_state: The FIP state to be entered
  *
  * Returns non-zero if the link was up and now isn't.
  */
 static int fcoe_ctlr_reset(struct fcoe_ctlr *fip, enum fip_state new_state)
 {
-	struct fc_lport *lp = fip->lp;
+	struct fc_lport *lport = fip->lp;
 	int link_dropped;
 
 	spin_lock_bh(&fip->lock);
@@ -295,19 +301,19 @@ static int fcoe_ctlr_reset(struct fcoe_ctlr *fip, enum fip_state new_state)
 	spin_unlock_bh(&fip->lock);
 
 	if (link_dropped)
-		fc_linkdown(lp);
+		fc_linkdown(lport);
 
 	if (new_state == FIP_ST_ENABLED) {
 		fcoe_ctlr_solicit(fip, NULL);
-		fc_linkup(lp);
+		fc_linkup(lport);
 		link_dropped = 0;
 	}
 	return link_dropped;
 }
 
 /**
- * fcoe_ctlr_link_down() - Stop FCoE controller.
- * @fip:	FCoE controller.
+ * fcoe_ctlr_link_down() - Stop a FCoE controller
+ * @fip: The FCoE controller to be stopped
  *
  * Returns non-zero if the link was up and now isn't.
  *
@@ -321,11 +327,11 @@ int fcoe_ctlr_link_down(struct fcoe_ctlr *fip)
 EXPORT_SYMBOL(fcoe_ctlr_link_down);
 
 /**
- * fcoe_ctlr_send_keep_alive() - Send a keep-alive to the selected FCF.
- * @fip:	FCoE controller.
- * @lport:	libfc fc_lport to send from
- * @ports:	0 for controller keep-alive, 1 for port keep-alive.
- * @sa:		source MAC address.
+ * fcoe_ctlr_send_keep_alive() - Send a keep-alive to the selected FCF
+ * @fip:   The FCoE controller to send the FKA on
+ * @lport: libfc fc_lport to send from
+ * @ports: 0 for controller keep-alive, 1 for port keep-alive
+ * @sa:	   The source MAC address
  *
  * A controller keep-alive is sent every fka_period (typically 8 seconds).
  * The source MAC is the native MAC address.
@@ -370,7 +376,7 @@ static void fcoe_ctlr_send_keep_alive(struct fcoe_ctlr *fip,
 	kal->fip.fip_op = htons(FIP_OP_CTRL);
 	kal->fip.fip_subcode = FIP_SC_KEEP_ALIVE;
 	kal->fip.fip_dl_len = htons((sizeof(kal->mac) +
-				    ports * sizeof(*vn)) / FIP_BPW);
+				     ports * sizeof(*vn)) / FIP_BPW);
 	kal->fip.fip_flags = htons(FIP_FL_FPMA);
 	if (fip->spma)
 		kal->fip.fip_flags |= htons(FIP_FL_SPMA);
@@ -394,11 +400,10 @@ static void fcoe_ctlr_send_keep_alive(struct fcoe_ctlr *fip,
 }
 
 /**
- * fcoe_ctlr_encaps() - Encapsulate an ELS frame for FIP, without sending it.
- * @fip:	FCoE controller.
- * @lport:	libfc fc_lport to use for the source address
- * @dtype:	FIP descriptor type for the frame.
- * @skb:	FCoE ELS frame including FC header but no FCoE headers.
+ * fcoe_ctlr_encaps() - Encapsulate an ELS frame for FIP, without sending it
+ * @fip:   The FCoE controller for the ELS frame
+ * @dtype: The FIP descriptor type for the frame
+ * @skb:   The FCoE ELS frame including FC header but no FCoE headers
  *
  * Returns non-zero error code on failure.
  *
@@ -554,9 +559,9 @@ drop:
 }
 EXPORT_SYMBOL(fcoe_ctlr_els_send);
 
-/*
- * fcoe_ctlr_age_fcfs() - Reset and free all old FCFs for a controller.
- * @fip:	FCoE controller.
+/**
+ * fcoe_ctlr_age_fcfs() - Reset and free all old FCFs for a controller
+ * @fip: The FCoE controller to free FCFs on
  *
  * Called with lock held.
  *
@@ -597,9 +602,9 @@ static void fcoe_ctlr_age_fcfs(struct fcoe_ctlr *fip)
 }
 
 /**
- * fcoe_ctlr_parse_adv() - Decode a FIP advertisement into a new FCF entry.
- * @skb:	received FIP advertisement frame
- * @fcf:	resulting FCF entry.
+ * fcoe_ctlr_parse_adv() - Decode a FIP advertisement into a new FCF entry
+ * @skb: The received FIP advertisement frame
+ * @fcf: The resulting FCF entry
  *
  * Returns zero on a valid parsed advertisement,
  * otherwise returns non zero value.
@@ -700,9 +705,9 @@ len_err:
 }
 
 /**
- * fcoe_ctlr_recv_adv() - Handle an incoming advertisement.
- * @fip:	FCoE controller.
- * @skb:	Received FIP packet.
+ * fcoe_ctlr_recv_adv() - Handle an incoming advertisement
+ * @fip: The FCoE controller receiving the advertisement
+ * @skb: The received FIP packet
  */
 static void fcoe_ctlr_recv_adv(struct fcoe_ctlr *fip, struct sk_buff *skb)
 {
@@ -785,7 +790,7 @@ static void fcoe_ctlr_recv_adv(struct fcoe_ctlr *fip, struct sk_buff *skb)
 	 */
 	if (mtu_valid && !fip->sel_time && fcoe_ctlr_fcf_usable(fcf)) {
 		fip->sel_time = jiffies +
-				msecs_to_jiffies(FCOE_CTLR_START_DELAY);
+			msecs_to_jiffies(FCOE_CTLR_START_DELAY);
 		if (!timer_pending(&fip->timer) ||
 		    time_before(fip->sel_time, fip->timer.expires))
 			mod_timer(&fip->timer, fip->sel_time);
@@ -795,13 +800,13 @@ out:
 }
 
 /**
- * fcoe_ctlr_recv_els() - Handle an incoming FIP-encapsulated ELS frame.
- * @fip:	FCoE controller.
- * @skb:	Received FIP packet.
+ * fcoe_ctlr_recv_els() - Handle an incoming FIP encapsulated ELS frame
+ * @fip: The FCoE controller which received the packet
+ * @skb: The received FIP packet
  */
 static void fcoe_ctlr_recv_els(struct fcoe_ctlr *fip, struct sk_buff *skb)
 {
-	struct fc_lport *lp = fip->lp;
+	struct fc_lport *lport = fip->lp;
 	struct fip_header *fiph;
 	struct fc_frame *fp = (struct fc_frame *)skb;
 	struct fc_frame_header *fh = NULL;
@@ -887,13 +892,13 @@ static void fcoe_ctlr_recv_els(struct fcoe_ctlr *fip, struct sk_buff *skb)
 	fc_frame_init(fp);
 	fr_sof(fp) = FC_SOF_I3;
 	fr_eof(fp) = FC_EOF_T;
-	fr_dev(fp) = lp;
+	fr_dev(fp) = lport;
 
-	stats = fc_lport_get_stats(lp);
+	stats = fc_lport_get_stats(lport);
 	stats->RxFrames++;
 	stats->RxWords += skb->len / FIP_BPW;
 
-	fc_exch_recv(lp, fp);
+	fc_exch_recv(lport, fp);
 	return;
 
 len_err:
@@ -904,15 +909,15 @@ drop:
 }
 
 /**
- * fcoe_ctlr_recv_els() - Handle an incoming link reset frame.
- * @fip:	FCoE controller.
- * @fh:		Received FIP header.
+ * fcoe_ctlr_recv_els() - Handle an incoming link reset frame
+ * @fip: The FCoE controller that received the frame
+ * @fh:	 The received FIP header
  *
  * There may be multiple VN_Port descriptors.
  * The overall length has already been checked.
  */
 static void fcoe_ctlr_recv_clr_vlink(struct fcoe_ctlr *fip,
-				      struct fip_header *fh)
+				     struct fip_header *fh)
 {
 	struct fip_desc *desc;
 	struct fip_mac_desc *mp;
@@ -921,13 +926,13 @@ static void fcoe_ctlr_recv_clr_vlink(struct fcoe_ctlr *fip,
 	size_t rlen;
 	size_t dlen;
 	struct fcoe_fcf *fcf = fip->sel_fcf;
-	struct fc_lport *lp = fip->lp;
+	struct fc_lport *lport = fip->lp;
 	u32	desc_mask;
 
 	LIBFCOE_FIP_DBG("Clear Virtual Link received\n");
 	if (!fcf)
 		return;
-	if (!fcf || !fc_host_port_id(lp->host))
+	if (!fcf || !fc_host_port_id(lport->host))
 		return;
 
 	/*
@@ -963,9 +968,10 @@ static void fcoe_ctlr_recv_clr_vlink(struct fcoe_ctlr *fip,
 			if (dlen < sizeof(*vp))
 				return;
 			if (compare_ether_addr(vp->fd_mac,
-			    fip->get_src_addr(lp)) == 0 &&
-			    get_unaligned_be64(&vp->fd_wwpn) == lp->wwpn &&
-			    ntoh24(vp->fd_fc_id) == fc_host_port_id(lp->host))
+					       fip->get_src_addr(lport)) == 0 &&
+			    get_unaligned_be64(&vp->fd_wwpn) == lport->wwpn &&
+			    ntoh24(vp->fd_fc_id) ==
+			    fc_host_port_id(lport->host))
 				desc_mask &= ~BIT(FIP_DT_VN_ID);
 			break;
 		default:
@@ -990,9 +996,9 @@ static void fcoe_ctlr_recv_clr_vlink(struct fcoe_ctlr *fip,
 }
 
 /**
- * fcoe_ctlr_recv() - Receive a FIP frame.
- * @fip:	FCoE controller.
- * @skb:	Received FIP packet.
+ * fcoe_ctlr_recv() - Receive a FIP packet
+ * @fip: The FCoE controller that received the packet
+ * @skb: The received FIP packet
  *
  * This is called from NET_RX_SOFTIRQ.
  */
@@ -1006,9 +1012,9 @@ void fcoe_ctlr_recv(struct fcoe_ctlr *fip, struct sk_buff *skb)
 EXPORT_SYMBOL(fcoe_ctlr_recv);
 
 /**
- * fcoe_ctlr_recv_handler() - Receive a FIP frame.
- * @fip:	FCoE controller.
- * @skb:	Received FIP packet.
+ * fcoe_ctlr_recv_handler() - Receive a FIP frame
+ * @fip: The FCoE controller that received the frame
+ * @skb: The received FIP frame
  *
  * Returns non-zero if the frame is dropped.
  */
@@ -1065,8 +1071,8 @@ drop:
 }
 
 /**
- * fcoe_ctlr_select() - Select the best FCF, if possible.
- * @fip:	FCoE controller.
+ * fcoe_ctlr_select() - Select the best FCF (if possible)
+ * @fip: The FCoE controller
  *
  * If there are conflicting advertisements, no FCF can be chosen.
  *
@@ -1107,8 +1113,8 @@ static void fcoe_ctlr_select(struct fcoe_ctlr *fip)
 }
 
 /**
- * fcoe_ctlr_timeout() - FIP timer function.
- * @arg:	&fcoe_ctlr pointer.
+ * fcoe_ctlr_timeout() - FIP timeout handler
+ * @arg: The FCoE controller that timed out
  *
  * Ages FCFs.  Triggers FCF selection if possible.  Sends keep-alives.
  */
@@ -1143,12 +1149,12 @@ static void fcoe_ctlr_timeout(unsigned long arg)
 			       fip->lp->host->host_no, sel->fcf_mac);
 			memcpy(fip->dest_addr, sel->fcf_mac, ETH_ALEN);
 			fip->port_ka_time = jiffies +
-					    msecs_to_jiffies(FIP_VN_KA_PERIOD);
+				msecs_to_jiffies(FIP_VN_KA_PERIOD);
 			fip->ctlr_ka_time = jiffies + sel->fka_period;
 			fip->link = 1;
 		} else {
 			printk(KERN_NOTICE "libfcoe: host%d: "
-			       "FIP Fibre-Channel Forwarder timed out.  "
+			       "FIP Fibre-Channel Forwarder timed out.	"
 			       "Starting FCF discovery.\n",
 			       fip->lp->host->host_no);
 			fip->link = 0;
@@ -1166,7 +1172,7 @@ static void fcoe_ctlr_timeout(unsigned long arg)
 
 		if (time_after_eq(jiffies, fip->port_ka_time)) {
 			fip->port_ka_time += jiffies +
-					msecs_to_jiffies(FIP_VN_KA_PERIOD);
+				msecs_to_jiffies(FIP_VN_KA_PERIOD);
 			fip->send_port_ka = 1;
 		}
 		if (time_after(next_timer, fip->port_ka_time))
@@ -1174,7 +1180,7 @@ static void fcoe_ctlr_timeout(unsigned long arg)
 		mod_timer(&fip->timer, next_timer);
 	} else if (fip->sel_time) {
 		next_timer = fip->sel_time +
-				msecs_to_jiffies(FCOE_CTLR_START_DELAY);
+			msecs_to_jiffies(FCOE_CTLR_START_DELAY);
 		mod_timer(&fip->timer, next_timer);
 	}
 	if (fip->send_ctlr_ka || fip->send_port_ka)
@@ -1183,8 +1189,8 @@ static void fcoe_ctlr_timeout(unsigned long arg)
 }
 
 /**
- * fcoe_ctlr_link_work() - worker thread function for link changes.
- * @work:	pointer to link_work member inside &fcoe_ctlr.
+ * fcoe_ctlr_link_work() - Worker thread function for link changes
+ * @work: Handle to a FCoE controller
  *
  * See if the link status has changed and if so, report it.
  *
@@ -1231,8 +1237,8 @@ static void fcoe_ctlr_link_work(struct work_struct *work)
 }
 
 /**
- * fcoe_ctlr_recv_work() - Worker thread function for receiving FIP frames.
- * @recv_work:	pointer to recv_work member inside &fcoe_ctlr.
+ * fcoe_ctlr_recv_work() - Worker thread function for receiving FIP frames
+ * @recv_work: Handle to a FCoE controller
  */
 static void fcoe_ctlr_recv_work(struct work_struct *recv_work)
 {
@@ -1250,11 +1256,10 @@ static void fcoe_ctlr_recv_work(struct work_struct *recv_work)
 }
 
 /**
- * fcoe_ctlr_recv_flogi() - snoop Pre-FIP receipt of FLOGI response or request.
- * @fip:	FCoE controller.
- * @lport:	libfc fc_lport instance received on
- * @fp:		FC frame.
- * @sa:		Ethernet source MAC address from received FCoE frame.
+ * fcoe_ctlr_recv_flogi() - Snoop pre-FIP receipt of FLOGI response or request
+ * @fip: The FCoE controller
+ * @fp:	 The FC frame to snoop
+ * @sa:	 Ethernet source MAC address from received FCoE frame
  *
  * Snoop potential response to FLOGI or even incoming FLOGI.
  *
@@ -1324,10 +1329,10 @@ int fcoe_ctlr_recv_flogi(struct fcoe_ctlr *fip, struct fc_lport *lport,
 EXPORT_SYMBOL(fcoe_ctlr_recv_flogi);
 
 /**
- * fcoe_wwn_from_mac() - Converts 48-bit IEEE MAC address to 64-bit FC WWN.
- * @mac: mac address
- * @scheme: check port
- * @port: port indicator for converting
+ * fcoe_wwn_from_mac() - Converts a 48-bit IEEE MAC address to a 64-bit FC WWN
+ * @mac:    The MAC address to convert
+ * @scheme: The scheme to use when converting
+ * @port:   The port indicator for converting
  *
  * Returns: u64 fc world wide name
  */
@@ -1365,23 +1370,24 @@ u64 fcoe_wwn_from_mac(unsigned char mac[MAX_ADDR_LEN],
 EXPORT_SYMBOL_GPL(fcoe_wwn_from_mac);
 
 /**
- * fcoe_libfc_config() - sets up libfc related properties for lport
- * @lp: ptr to the fc_lport
- * @tt: libfc function template
+ * fcoe_libfc_config() - Sets up libfc related properties for local port
+ * @lp: The local port to configure libfc for
+ * @tt: The libfc function template
  *
  * Returns : 0 for success
  */
-int fcoe_libfc_config(struct fc_lport *lp, struct libfc_function_template *tt)
+int fcoe_libfc_config(struct fc_lport *lport,
+		      struct libfc_function_template *tt)
 {
 	/* Set the function pointers set by the LLDD */
-	memcpy(&lp->tt, tt, sizeof(*tt));
-	if (fc_fcp_init(lp))
+	memcpy(&lport->tt, tt, sizeof(*tt));
+	if (fc_fcp_init(lport))
 		return -ENOMEM;
-	fc_exch_init(lp);
-	fc_elsct_init(lp);
-	fc_lport_init(lp);
-	fc_rport_init(lp);
-	fc_disc_init(lp);
+	fc_exch_init(lport);
+	fc_elsct_init(lport);
+	fc_lport_init(lport);
+	fc_rport_init(lport);
+	fc_disc_init(lport);
 
 	return 0;
 }
diff --git a/include/scsi/libfcoe.h b/include/scsi/libfcoe.h
index 8ef5e20..76d08c9 100644
--- a/include/scsi/libfcoe.h
+++ b/include/scsi/libfcoe.h
@@ -53,35 +53,35 @@ enum fip_state {
 };
 
 /**
- * struct fcoe_ctlr - FCoE Controller and FIP state.
- * @state:	internal FIP state for network link and FIP or non-FIP mode.
- * @lp:		&fc_lport: libfc local port.
- * @sel_fcf:	currently selected FCF, or NULL.
- * @fcfs:	list of discovered FCFs.
- * @fcf_count:	number of discovered FCF entries.
- * @sol_time:	time when a multicast solicitation was last sent.
- * @sel_time:	time after which to select an FCF.
- * @port_ka_time: time of next port keep-alive.
- * @ctlr_ka_time: time of next controller keep-alive.
- * @timer:	timer struct used for all delayed events.
- * @link_work:	&work_struct for doing FCF selection.
- * @recv_work:	&work_struct for receiving FIP frames.
+ * struct fcoe_ctlr - FCoE Controller and FIP state
+ * @state:	   internal FIP state for network link and FIP or non-FIP mode.
+ * @lp:		   &fc_lport: libfc local port.
+ * @sel_fcf:	   currently selected FCF, or NULL.
+ * @fcfs:	   list of discovered FCFs.
+ * @fcf_count:	   number of discovered FCF entries.
+ * @sol_time:	   time when a multicast solicitation was last sent.
+ * @sel_time:	   time after which to select an FCF.
+ * @port_ka_time:  time of next port keep-alive.
+ * @ctlr_ka_time:  time of next controller keep-alive.
+ * @timer:	   timer struct used for all delayed events.
+ * @link_work:	   &work_struct for doing FCF selection.
+ * @recv_work:	   &work_struct for receiving FIP frames.
  * @fip_recv_list: list of received FIP frames.
- * @user_mfs:	configured maximum FC frame size, including FC header.
- * @flogi_oxid: exchange ID of most recent fabric login.
- * @flogi_count: number of FLOGI attempts in AUTO mode.
- * @link:	current link status for libfc.
- * @last_link:	last link state reported to libfc.
- * @map_dest:	use the FC_MAP mode for destination MAC addresses.
- * @spma:	supports SPMA server-provided MACs mode
- * @send_ctlr_ka: need to send controller keep alive
- * @send_port_ka: need to send port keep alives
- * @dest_addr:	MAC address of the selected FC forwarder.
- * @ctl_src_addr: the native MAC address of our local port.
- * @send:	LLD-supplied function to handle sending of FIP Ethernet frames.
- * @update_mac: LLD-supplied function to handle changes to MAC addresses.
- * @get_src_addr: LLD-supplied function to supply a source MAC address.
- * @lock:	lock protecting this structure.
+ * @user_mfs:	   configured maximum FC frame size, including FC header.
+ * @flogi_oxid:    exchange ID of most recent fabric login.
+ * @flogi_count:   number of FLOGI attempts in AUTO mode.
+ * @link:	   current link status for libfc.
+ * @last_link:	   last link state reported to libfc.
+ * @map_dest:	   use the FC_MAP mode for destination MAC addresses.
+ * @spma:	   supports SPMA server-provided MACs mode
+ * @send_ctlr_ka:  need to send controller keep alive
+ * @send_port_ka:  need to send port keep alives
+ * @dest_addr:	   MAC address of the selected FC forwarder.
+ * @ctl_src_addr:  the native MAC address of our local port.
+ * @send:	   LLD-supplied function to handle sending FIP Ethernet frames
+ * @update_mac:    LLD-supplied function to handle changes to MAC addresses.
+ * @get_src_addr:  LLD-supplied function to supply a source MAC address.
+ * @lock:	   lock protecting this structure.
  *
  * This structure is used by all FCoE drivers.  It contains information
  * needed by all FCoE low-level drivers (LLDs) as well as internal state
@@ -119,18 +119,18 @@ struct fcoe_ctlr {
 	spinlock_t lock;
 };
 
-/*
- * struct fcoe_fcf - Fibre-Channel Forwarder.
- * @list:	list linkage.
- * @time:	system time (jiffies) when an advertisement was last received.
- * @switch_name: WWN of switch from advertisement.
- * @fabric_name: WWN of fabric from advertisement.
- * @fc_map:	FC_MAP value from advertisement.
- * @fcf_mac:	Ethernet address of the FCF.
- * @vfid:	virtual fabric ID.
- * @pri:	seletion priority, smaller values are better.
- * @flags:	flags received from advertisement.
- * @fka_period:	keep-alive period, in jiffies.
+/**
+ * struct fcoe_fcf - Fibre-Channel Forwarder
+ * @list:	 list linkage
+ * @time:	 system time (jiffies) when an advertisement was last received
+ * @switch_name: WWN of switch from advertisement
+ * @fabric_name: WWN of fabric from advertisement
+ * @fc_map:	 FC_MAP value from advertisement
+ * @fcf_mac:	 Ethernet address of the FCF
+ * @vfid:	 virtual fabric ID
+ * @pri:	 selection priority, smaller values are better
+ * @flags:	 flags received from advertisement
+ * @fka_period:	 keep-alive period, in jiffies
  *
  * A Fibre-Channel Forwarder (FCF) is the entity on the Ethernet that
  * passes FCoE frames on to an FC fabric.  This structure represents
@@ -161,8 +161,8 @@ void fcoe_ctlr_link_up(struct fcoe_ctlr *);
 int fcoe_ctlr_link_down(struct fcoe_ctlr *);
 int fcoe_ctlr_els_send(struct fcoe_ctlr *, struct fc_lport *, struct sk_buff *);
 void fcoe_ctlr_recv(struct fcoe_ctlr *, struct sk_buff *);
-int fcoe_ctlr_recv_flogi(struct fcoe_ctlr *, struct fc_lport *lport,
-			 struct fc_frame *fp, u8 *sa);
+int fcoe_ctlr_recv_flogi(struct fcoe_ctlr *, struct fc_lport *,
+			 struct fc_frame *, u8 *);
 
 /* libfcoe funcs */
 u64 fcoe_wwn_from_mac(unsigned char mac[], unsigned int, unsigned int);

[PATCH 31/35] fcoe: Formatting cleanups and commenting

[Robert Love]

Added kernel-doc comment blocks to all structures and functions.

Renamed fc_lport instances rom lp to lport to be inline with our
naming convention.

Renamed all misnamed net_device instances to netdev to be inline
with our naming convention.

Signed-off-by: Robert Love <robert.w.love@intel.com>
---

 drivers/scsi/fcoe/fcoe.c |  722 +++++++++++++++++++++++++---------------------
 drivers/scsi/fcoe/fcoe.h |   75 +++--
 2 files changed, 441 insertions(+), 356 deletions(-)

diff --git a/drivers/scsi/fcoe/fcoe.c b/drivers/scsi/fcoe/fcoe.c
index ecd1b9d..c3d5364 100644
--- a/drivers/scsi/fcoe/fcoe.c
+++ b/drivers/scsi/fcoe/fcoe.c
@@ -66,14 +66,14 @@ LIST_HEAD(fcoe_hostlist);
 DEFINE_PER_CPU(struct fcoe_percpu_s, fcoe_percpu);
 
 /* Function Prototypes */
-static int fcoe_reset(struct Scsi_Host *shost);
+static int fcoe_reset(struct Scsi_Host *);
 static int fcoe_xmit(struct fc_lport *, struct fc_frame *);
 static int fcoe_rcv(struct sk_buff *, struct net_device *,
 		    struct packet_type *, struct net_device *);
-static int fcoe_percpu_receive_thread(void *arg);
-static void fcoe_clean_pending_queue(struct fc_lport *lp);
-static void fcoe_percpu_clean(struct fc_lport *lp);
-static int fcoe_link_ok(struct fc_lport *lp);
+static int fcoe_percpu_receive_thread(void *);
+static void fcoe_clean_pending_queue(struct fc_lport *);
+static void fcoe_percpu_clean(struct fc_lport *);
+static int fcoe_link_ok(struct fc_lport *);
 
 static struct fc_lport *fcoe_hostlist_lookup(const struct net_device *);
 static int fcoe_hostlist_add(const struct fc_lport *);
@@ -82,21 +82,68 @@ static void fcoe_check_wait_queue(struct fc_lport *, struct sk_buff *);
 static int fcoe_device_notification(struct notifier_block *, ulong, void *);
 static void fcoe_dev_setup(void);
 static void fcoe_dev_cleanup(void);
-static struct fcoe_interface *
-	fcoe_hostlist_lookup_port(const struct net_device *dev);
+static struct fcoe_interface
+*fcoe_hostlist_lookup_port(const struct net_device *);
+
+static int fcoe_fip_recv(struct sk_buff *, struct net_device *,
+			 struct packet_type *, struct net_device *);
+
+static void fcoe_fip_send(struct fcoe_ctlr *, struct sk_buff *);
+static void fcoe_update_src_mac(struct fc_lport *, u8 *);
+static u8 *fcoe_get_src_mac(struct fc_lport *);
+static void fcoe_destroy_work(struct work_struct *);
+
+static int fcoe_ddp_setup(struct fc_lport *, u16, struct scatterlist *,
+			  unsigned int);
+static int fcoe_ddp_done(struct fc_lport *, u16);
+
+static int fcoe_cpu_callback(struct notifier_block *, unsigned long, void *);
+
+static int fcoe_create(const char *, struct kernel_param *);
+static int fcoe_destroy(const char *, struct kernel_param *);
+
+static u8 *fcoe_get_src_mac(struct fc_lport *);
+static void fcoe_destroy_work(struct work_struct *);
 
-/* notification function from net device */
+static struct fc_seq *fcoe_elsct_send(struct fc_lport *,
+				      u32 did, struct fc_frame *,
+				      unsigned int op,
+				      void (*resp)(struct fc_seq *,
+						   struct fc_frame *,
+						   void *),
+				      void *, u32 timeout);
+
+module_param_call(create, fcoe_create, NULL, NULL, S_IWUSR);
+__MODULE_PARM_TYPE(create, "string");
+MODULE_PARM_DESC(create, "Create fcoe fcoe using net device passed in.");
+module_param_call(destroy, fcoe_destroy, NULL, NULL, S_IWUSR);
+__MODULE_PARM_TYPE(destroy, "string");
+MODULE_PARM_DESC(destroy, "Destroy fcoe fcoe");
+
+/* notification function for packets from net device */
 static struct notifier_block fcoe_notifier = {
 	.notifier_call = fcoe_device_notification,
 };
 
+/* notification function for CPU hotplug events */
+static struct notifier_block fcoe_cpu_notifier = {
+	.notifier_call = fcoe_cpu_callback,
+};
+
 static struct scsi_transport_template *fcoe_transport_template;
 static struct scsi_transport_template *fcoe_vport_transport_template;
 
-static int fcoe_vport_destroy(struct fc_vport *vport);
-static int fcoe_vport_create(struct fc_vport *vport, bool disabled);
-static int fcoe_vport_disable(struct fc_vport *vport, bool disable);
-static void fcoe_set_vport_symbolic_name(struct fc_vport *vport);
+static int fcoe_vport_destroy(struct fc_vport *);
+static int fcoe_vport_create(struct fc_vport *, bool disabled);
+static int fcoe_vport_disable(struct fc_vport *, bool disable);
+static void fcoe_set_vport_symbolic_name(struct fc_vport *);
+
+static struct libfc_function_template fcoe_libfc_fcn_templ = {
+	.frame_send = fcoe_xmit,
+	.ddp_setup = fcoe_ddp_setup,
+	.ddp_done = fcoe_ddp_done,
+	.elsct_send = fcoe_elsct_send,
+};
 
 struct fc_function_template fcoe_transport_function = {
 	.show_host_node_name = 1,
@@ -192,13 +239,10 @@ static struct scsi_host_template fcoe_shost_template = {
 	.max_sectors = 0xffff,
 };
 
-static int fcoe_fip_recv(struct sk_buff *skb, struct net_device *dev,
-			 struct packet_type *ptype,
-			 struct net_device *orig_dev);
 /**
- * fcoe_interface_setup()
- * @fcoe: new fcoe_interface
- * @netdev : ptr to the associated netdevice struct
+ * fcoe_interface_setup() - Setup a FCoE interface
+ * @fcoe:   The new FCoE interface
+ * @netdev: The net device that the fcoe interface is on
  *
  * Returns : 0 for success
  * Locking: must be called with the RTNL mutex held
@@ -264,14 +308,9 @@ static int fcoe_interface_setup(struct fcoe_interface *fcoe,
 	return 0;
 }
 
-static void fcoe_fip_send(struct fcoe_ctlr *fip, struct sk_buff *skb);
-static void fcoe_update_src_mac(struct fc_lport *lport, u8 *addr);
-static u8 *fcoe_get_src_mac(struct fc_lport *lport);
-static void fcoe_destroy_work(struct work_struct *work);
-
 /**
- * fcoe_interface_create()
- * @netdev: network interface
+ * fcoe_interface_create() - Create a FCoE interface on a net device
+ * @netdev: The net device to create the FCoE interface on
  *
  * Returns: pointer to a struct fcoe_interface or NULL on error
  */
@@ -302,8 +341,8 @@ static struct fcoe_interface *fcoe_interface_create(struct net_device *netdev)
 }
 
 /**
- * fcoe_interface_cleanup() - clean up netdev configurations
- * @fcoe:
+ * fcoe_interface_cleanup() - Clean up a FCoE interface
+ * @fcoe: The FCoE interface to be cleaned up
  *
  * Caller must be holding the RTNL mutex
  */
@@ -333,7 +372,7 @@ void fcoe_interface_cleanup(struct fcoe_interface *fcoe)
 
 /**
  * fcoe_interface_release() - fcoe_port kref release function
- * @kref: embedded reference count in an fcoe_interface struct
+ * @kref: Embedded reference count in an fcoe_interface struct
  */
 static void fcoe_interface_release(struct kref *kref)
 {
@@ -349,8 +388,8 @@ static void fcoe_interface_release(struct kref *kref)
 }
 
 /**
- * fcoe_interface_get()
- * @fcoe:
+ * fcoe_interface_get() - Get a reference to a FCoE interface
+ * @fcoe: The FCoE interface to be held
  */
 static inline void fcoe_interface_get(struct fcoe_interface *fcoe)
 {
@@ -358,8 +397,8 @@ static inline void fcoe_interface_get(struct fcoe_interface *fcoe)
 }
 
 /**
- * fcoe_interface_put()
- * @fcoe:
+ * fcoe_interface_put() - Put a reference to a FCoE interface
+ * @fcoe: The FCoE interface to be released
  */
 static inline void fcoe_interface_put(struct fcoe_interface *fcoe)
 {
@@ -367,15 +406,16 @@ static inline void fcoe_interface_put(struct fcoe_interface *fcoe)
 }
 
 /**
- * fcoe_fip_recv - handle a received FIP frame.
- * @skb: the receive skb
- * @dev: associated &net_device
- * @ptype: the &packet_type structure which was used to register this handler.
- * @orig_dev: original receive &net_device, in case @dev is a bond.
+ * fcoe_fip_recv() - Handler for received FIP frames
+ * @skb:      The receive skb
+ * @netdev:   The associated net device
+ * @ptype:    The packet_type structure which was used to register this handler
+ * @orig_dev: The original net_device the the skb was received on.
+ *	      (in case dev is a bond)
  *
  * Returns: 0 for success
  */
-static int fcoe_fip_recv(struct sk_buff *skb, struct net_device *dev,
+static int fcoe_fip_recv(struct sk_buff *skb, struct net_device *netdev,
 			 struct packet_type *ptype,
 			 struct net_device *orig_dev)
 {
@@ -387,9 +427,9 @@ static int fcoe_fip_recv(struct sk_buff *skb, struct net_device *dev,
 }
 
 /**
- * fcoe_fip_send() - send an Ethernet-encapsulated FIP frame.
- * @fip: FCoE controller.
- * @skb: FIP Packet.
+ * fcoe_fip_send() - Send an Ethernet-encapsulated FIP frame
+ * @fip: The FCoE controller
+ * @skb: The FIP packet to be sent
  */
 static void fcoe_fip_send(struct fcoe_ctlr *fip, struct sk_buff *skb)
 {
@@ -398,9 +438,9 @@ static void fcoe_fip_send(struct fcoe_ctlr *fip, struct sk_buff *skb)
 }
 
 /**
- * fcoe_update_src_mac() - Update Ethernet MAC filters.
- * @lport: libfc lport
- * @addr: Unicast MAC address to add.
+ * fcoe_update_src_mac() - Update the Ethernet MAC filters
+ * @lport: The local port to update the source MAC on
+ * @addr:  Unicast MAC address to add
  *
  * Remove any previously-set unicast MAC filter.
  * Add secondary FCoE MAC address filter for our OUI.
@@ -431,60 +471,59 @@ static u8 *fcoe_get_src_mac(struct fc_lport *lport)
 }
 
 /**
- * fcoe_lport_config() - sets up the fc_lport
- * @lp: ptr to the fc_lport
+ * fcoe_lport_config() - Set up a local port
+ * @lport: The local port to be setup
  *
  * Returns: 0 for success
  */
-static int fcoe_lport_config(struct fc_lport *lp)
+static int fcoe_lport_config(struct fc_lport *lport)
 {
-	lp->link_up = 0;
-	lp->qfull = 0;
-	lp->max_retry_count = 3;
-	lp->max_rport_retry_count = 3;
-	lp->e_d_tov = 2 * 1000;	/* FC-FS default */
-	lp->r_a_tov = 2 * 2 * 1000;
-	lp->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS |
-			      FCP_SPPF_RETRY | FCP_SPPF_CONF_COMPL);
-	lp->does_npiv = 1;
-
-	fc_lport_init_stats(lp);
+	lport->link_up = 0;
+	lport->qfull = 0;
+	lport->max_retry_count = 3;
+	lport->max_rport_retry_count = 3;
+	lport->e_d_tov = 2 * 1000;	/* FC-FS default */
+	lport->r_a_tov = 2 * 2 * 1000;
+	lport->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS |
+				 FCP_SPPF_RETRY | FCP_SPPF_CONF_COMPL);
+	lport->does_npiv = 1;
+
+	fc_lport_init_stats(lport);
 
 	/* lport fc_lport related configuration */
-	fc_lport_config(lp);
+	fc_lport_config(lport);
 
 	/* offload related configuration */
-	lp->crc_offload = 0;
-	lp->seq_offload = 0;
-	lp->lro_enabled = 0;
-	lp->lro_xid = 0;
-	lp->lso_max = 0;
+	lport->crc_offload = 0;
+	lport->seq_offload = 0;
+	lport->lro_enabled = 0;
+	lport->lro_xid = 0;
+	lport->lso_max = 0;
 
 	return 0;
 }
 
 /**
- * fcoe_queue_timer() - fcoe queue timer
- * @lp: the fc_lport pointer
+ * fcoe_queue_timer() - The fcoe queue timer
+ * @lport: The local port
  *
  * Calls fcoe_check_wait_queue on timeout
- *
  */
-static void fcoe_queue_timer(ulong lp)
+static void fcoe_queue_timer(ulong lport)
 {
-	fcoe_check_wait_queue((struct fc_lport *)lp, NULL);
+	fcoe_check_wait_queue((struct fc_lport *)lport, NULL);
 }
 
 /**
- * fcoe_netdev_config() - Set up netdev for SW FCoE
- * @lp : ptr to the fc_lport
- * @netdev : ptr to the associated netdevice struct
+ * fcoe_netdev_config() - Set up net devive for SW FCoE
+ * @lport:  The local port that is associated with the net device
+ * @netdev: The associated net device
  *
- * Must be called after fcoe_lport_config() as it will use lport mutex
+ * Must be called after fcoe_lport_config() as it will use local port mutex
  *
- * Returns : 0 for success
+ * Returns: 0 for success
  */
-static int fcoe_netdev_config(struct fc_lport *lp, struct net_device *netdev)
+static int fcoe_netdev_config(struct fc_lport *lport, struct net_device *netdev)
 {
 	u32 mfs;
 	u64 wwnn, wwpn;
@@ -492,7 +531,7 @@ static int fcoe_netdev_config(struct fc_lport *lp, struct net_device *netdev)
 	struct fcoe_port *port;
 
 	/* Setup lport private data to point to fcoe softc */
-	port = lport_priv(lp);
+	port = lport_priv(lport);
 	fcoe = port->fcoe;
 
 	/*
@@ -502,91 +541,100 @@ static int fcoe_netdev_config(struct fc_lport *lp, struct net_device *netdev)
 	 */
 	mfs = netdev->mtu - (sizeof(struct fcoe_hdr) +
 			     sizeof(struct fcoe_crc_eof));
-	if (fc_set_mfs(lp, mfs))
+	if (fc_set_mfs(lport, mfs))
 		return -EINVAL;
 
 	/* offload features support */
 	if (netdev->features & NETIF_F_SG)
-		lp->sg_supp = 1;
+		lport->sg_supp = 1;
 
 	if (netdev->features & NETIF_F_FCOE_CRC) {
-		lp->crc_offload = 1;
+		lport->crc_offload = 1;
 		FCOE_NETDEV_DBG(netdev, "Supports FCCRC offload\n");
 	}
 	if (netdev->features & NETIF_F_FSO) {
-		lp->seq_offload = 1;
-		lp->lso_max = netdev->gso_max_size;
+		lport->seq_offload = 1;
+		lport->lso_max = netdev->gso_max_size;
 		FCOE_NETDEV_DBG(netdev, "Supports LSO for max len 0x%x\n",
-				lp->lso_max);
+				lport->lso_max);
 	}
 	if (netdev->fcoe_ddp_xid) {
-		lp->lro_enabled = 1;
-		lp->lro_xid = netdev->fcoe_ddp_xid;
+		lport->lro_enabled = 1;
+		lport->lro_xid = netdev->fcoe_ddp_xid;
 		FCOE_NETDEV_DBG(netdev, "Supports LRO for max xid 0x%x\n",
-				lp->lro_xid);
+				lport->lro_xid);
 	}
 	skb_queue_head_init(&port->fcoe_pending_queue);
 	port->fcoe_pending_queue_active = 0;
-	setup_timer(&port->timer, fcoe_queue_timer, (unsigned long)lp);
+	setup_timer(&port->timer, fcoe_queue_timer, (unsigned long)lport);
 
-	if (!lp->vport) {
+	if (!lport->vport) {
 		wwnn = fcoe_wwn_from_mac(netdev->dev_addr, 1, 0);
-		fc_set_wwnn(lp, wwnn);
+		fc_set_wwnn(lport, wwnn);
 		/* XXX - 3rd arg needs to be vlan id */
 		wwpn = fcoe_wwn_from_mac(netdev->dev_addr, 2, 0);
-		fc_set_wwpn(lp, wwpn);
+		fc_set_wwpn(lport, wwpn);
 	}
 
 	return 0;
 }
 
 /**
- * fcoe_shost_config() - Sets up fc_lport->host
- * @lp : ptr to the fc_lport
- * @shost : ptr to the associated scsi host
- * @dev : device associated to scsi host
+ * fcoe_shost_config() - Set up the SCSI host associated with a local port
+ * @lport: The local port
+ * @shost: The SCSI host to associate with the local port
+ * @dev:   The device associated with the SCSI host
  *
  * Must be called after fcoe_lport_config() and fcoe_netdev_config()
  *
- * Returns : 0 for success
+ * Returns: 0 for success
  */
-static int fcoe_shost_config(struct fc_lport *lp, struct Scsi_Host *shost,
-				struct device *dev)
+static int fcoe_shost_config(struct fc_lport *lport, struct Scsi_Host *shost,
+			     struct device *dev)
 {
 	int rc = 0;
 
 	/* lport scsi host config */
-	lp->host->max_lun = FCOE_MAX_LUN;
-	lp->host->max_id = FCOE_MAX_FCP_TARGET;
-	lp->host->max_channel = 0;
-	if (lp->vport)
-		lp->host->transportt = fcoe_vport_transport_template;
+	lport->host->max_lun = FCOE_MAX_LUN;
+	lport->host->max_id = FCOE_MAX_FCP_TARGET;
+	lport->host->max_channel = 0;
+	if (lport->vport)
+		lport->host->transportt = fcoe_vport_transport_template;
 	else
-		lp->host->transportt = fcoe_transport_template;
+		lport->host->transportt = fcoe_transport_template;
 
 	/* add the new host to the SCSI-ml */
-	rc = scsi_add_host(lp->host, dev);
+	rc = scsi_add_host(lport->host, dev);
 	if (rc) {
-		FCOE_NETDEV_DBG(fcoe_netdev(lp), "fcoe_shost_config: "
+		FCOE_NETDEV_DBG(fcoe_netdev(lport), "fcoe_shost_config: "
 				"error on scsi_add_host\n");
 		return rc;
 	}
 
-	if (!lp->vport)
-		fc_host_max_npiv_vports(lp->host) = USHORT_MAX;
+	if (!lport->vport)
+		fc_host_max_npiv_vports(lport->host) = USHORT_MAX;
 
-	snprintf(fc_host_symbolic_name(lp->host), FC_SYMBOLIC_NAME_SIZE,
+	snprintf(fc_host_symbolic_name(lport->host), FC_SYMBOLIC_NAME_SIZE,
 		 "%s v%s over %s", FCOE_NAME, FCOE_VERSION,
-		 fcoe_netdev(lp)->name);
+		 fcoe_netdev(lport)->name);
 
 	return 0;
 }
 
-/*
- * fcoe_oem_match() - match for read types IO
- * @fp: the fc_frame for new IO.
+/**
+ * fcoe_oem_match() - The match routine for the offloaded exchange manager
+ * @fp: The I/O frame
  *
- * Returns : true for read types IO, otherwise returns false.
+ * This routine will be associated with an exchange manager (EM). When
+ * the libfc exchange handling code is looking for an EM to use it will
+ * call this routine and pass it the frame that it wishes to send. This
+ * routine will return True if the associated EM is to be used and False
+ * if the echange code should continue looking for an EM.
+ *
+ * The offload EM that this routine is associated with will handle any
+ * packets that are for SCSI read requests.
+ *
+ * Returns: True for read types I/O, otherwise returns false.
  */
 bool fcoe_oem_match(struct fc_frame *fp)
 {
@@ -595,14 +643,14 @@ bool fcoe_oem_match(struct fc_frame *fp)
 }
 
 /**
- * fcoe_em_config() - allocates em for this lport
- * @lp: the fcoe that em is to allocated for
+ * fcoe_em_config() - Allocate and configure an exchange manager
+ * @lport: The local port that the new EM will be associated with
  *
- * Returns : 0 on success
+ * Returns: 0 on success
  */
-static inline int fcoe_em_config(struct fc_lport *lp)
+static inline int fcoe_em_config(struct fc_lport *lport)
 {
-	struct fcoe_port *port = lport_priv(lp);
+	struct fcoe_port *port = lport_priv(lport);
 	struct fcoe_interface *fcoe = port->fcoe;
 	struct fcoe_interface *oldfcoe = NULL;
 	struct net_device *old_real_dev, *cur_real_dev;
@@ -613,8 +661,9 @@ static inline int fcoe_em_config(struct fc_lport *lp)
 	 * Check if need to allocate an em instance for
 	 * offload exchange ids to be shared across all VN_PORTs/lport.
 	 */
-	if (!lp->lro_enabled || !lp->lro_xid || (lp->lro_xid >= max_xid)) {
-		lp->lro_xid = 0;
+	if (!lport->lro_enabled || !lport->lro_xid ||
+	    (lport->lro_xid >= max_xid)) {
+		lport->lro_xid = 0;
 		goto skip_oem;
 	}
 
@@ -640,16 +689,16 @@ static inline int fcoe_em_config(struct fc_lport *lp)
 	}
 
 	if (fcoe->oem) {
-		if (!fc_exch_mgr_add(lp, fcoe->oem, fcoe_oem_match)) {
+		if (!fc_exch_mgr_add(lport, fcoe->oem, fcoe_oem_match)) {
 			printk(KERN_ERR "fcoe_em_config: failed to add "
 			       "offload em:%p on interface:%s\n",
 			       fcoe->oem, fcoe->netdev->name);
 			return -ENOMEM;
 		}
 	} else {
-		fcoe->oem = fc_exch_mgr_alloc(lp, FC_CLASS_3,
-					    FCOE_MIN_XID, lp->lro_xid,
-					    fcoe_oem_match);
+		fcoe->oem = fc_exch_mgr_alloc(lport, FC_CLASS_3,
+					      FCOE_MIN_XID, lport->lro_xid,
+					      fcoe_oem_match);
 		if (!fcoe->oem) {
 			printk(KERN_ERR "fcoe_em_config: failed to allocate "
 			       "em for offload exches on interface:%s\n",
@@ -661,10 +710,10 @@ static inline int fcoe_em_config(struct fc_lport *lp)
 	/*
 	 * Exclude offload EM xid range from next EM xid range.
 	 */
-	min_xid += lp->lro_xid + 1;
+	min_xid += lport->lro_xid + 1;
 
 skip_oem:
-	if (!fc_exch_mgr_alloc(lp, FC_CLASS_3, min_xid, max_xid, NULL)) {
+	if (!fc_exch_mgr_alloc(lport, FC_CLASS_3, min_xid, max_xid, NULL)) {
 		printk(KERN_ERR "fcoe_em_config: failed to "
 		       "allocate em on interface %s\n", fcoe->netdev->name);
 		return -ENOMEM;
@@ -674,8 +723,8 @@ skip_oem:
 }
 
 /**
- * fcoe_if_destroy() - FCoE software HBA tear-down function
- * @lport: fc_lport to destroy
+ * fcoe_if_destroy() - Tear down a SW FCoE instance
+ * @lport: The local port to be destroyed
  */
 static void fcoe_if_destroy(struct fc_lport *lport)
 {
@@ -723,72 +772,62 @@ static void fcoe_if_destroy(struct fc_lport *lport)
 	scsi_host_put(lport->host);
 }
 
-/*
- * fcoe_ddp_setup - calls LLD's ddp_setup through net_device
- * @lp:	the corresponding fc_lport
- * @xid: the exchange id for this ddp transfer
- * @sgl: the scatterlist describing this transfer
- * @sgc: number of sg items
+/**
+ * fcoe_ddp_setup() - Call a LLD's ddp_setup through the net device
+ * @lport: The local port to setup DDP for
+ * @xid:   The exchange ID for this DDP transfer
+ * @sgl:   The scatterlist describing this transfer
+ * @sgc:   The number of sg items
  *
- * Returns : 0 no ddp
+ * Returns: 0 if the DDP context was not configured
  */
-static int fcoe_ddp_setup(struct fc_lport *lp, u16 xid,
-			     struct scatterlist *sgl, unsigned int sgc)
+static int fcoe_ddp_setup(struct fc_lport *lport, u16 xid,
+			  struct scatterlist *sgl, unsigned int sgc)
 {
-	struct net_device *n = fcoe_netdev(lp);
+	struct net_device *netdev = fcoe_netdev(lport);
 
-	if (n->netdev_ops->ndo_fcoe_ddp_setup)
-		return n->netdev_ops->ndo_fcoe_ddp_setup(n, xid, sgl, sgc);
+	if (netdev->netdev_ops->ndo_fcoe_ddp_setup)
+		return netdev->netdev_ops->ndo_fcoe_ddp_setup(netdev,
+							      xid, sgl,
+							      sgc);
 
 	return 0;
 }
 
-/*
- * fcoe_ddp_done - calls LLD's ddp_done through net_device
- * @lp:	the corresponding fc_lport
- * @xid: the exchange id for this ddp transfer
+/**
+ * fcoe_ddp_done() - Call a LLD's ddp_done through the net device
+ * @lport: The local port to complete DDP on
+ * @xid:   The exchange ID for this DDP transfer
  *
- * Returns : the length of data that have been completed by ddp
+ * Returns: the length of data that have been completed by DDP
  */
-static int fcoe_ddp_done(struct fc_lport *lp, u16 xid)
+static int fcoe_ddp_done(struct fc_lport *lport, u16 xid)
 {
-	struct net_device *n = fcoe_netdev(lp);
+	struct net_device *netdev = fcoe_netdev(lport);
 
-	if (n->netdev_ops->ndo_fcoe_ddp_done)
-		return n->netdev_ops->ndo_fcoe_ddp_done(n, xid);
+	if (netdev->netdev_ops->ndo_fcoe_ddp_done)
+		return netdev->netdev_ops->ndo_fcoe_ddp_done(netdev, xid);
 	return 0;
 }
 
-static struct fc_seq *fcoe_elsct_send(struct fc_lport *lport,
-		u32 did, struct fc_frame *fp, unsigned int op,
-		void (*resp)(struct fc_seq *, struct fc_frame *, void *),
-		void *arg, u32 timeout);
-
-static struct libfc_function_template fcoe_libfc_fcn_templ = {
-	.frame_send = fcoe_xmit,
-	.ddp_setup = fcoe_ddp_setup,
-	.ddp_done = fcoe_ddp_done,
-	.elsct_send = fcoe_elsct_send,
-};
-
 /**
- * fcoe_if_create() - this function creates the fcoe port
- * @fcoe: fcoe_interface structure to create an fc_lport instance on
- * @parent: device pointer to be the parent in sysfs for the SCSI host
- * @npiv: is this a vport?
+ * fcoe_if_create() - Create a FCoE instance on an interface
+ * @fcoe:   The FCoE interface to create a local port on
+ * @parent: The device pointer to be the parent in sysfs for the SCSI host
+ * @npiv:   Indicates if the port is a vport or not
  *
- * Creates fc_lport struct and scsi_host for lport, configures lport.
+ * Creates a fc_lport instance and a Scsi_Host instance and configure them.
  *
- * Returns : The allocated fc_lport or an error pointer
+ * Returns: The allocated fc_lport or an error pointer
  */
 static struct fc_lport *fcoe_if_create(struct fcoe_interface *fcoe,
 				       struct device *parent, int npiv)
 {
-	int rc;
+	struct net_device *netdev = fcoe->netdev;
 	struct fc_lport *lport = NULL;
 	struct fcoe_port *port;
 	struct Scsi_Host *shost;
-	struct net_device *netdev = fcoe->netdev;
+	int rc;
 	/*
 	 * parent is only a vport if npiv is 1,
 	 * but we'll only use vport in that case so go ahead and set it
@@ -815,7 +854,7 @@ static struct fc_lport *fcoe_if_create(struct fcoe_interface *fcoe,
 	port->fcoe = fcoe;
 	INIT_WORK(&port->destroy_work, fcoe_destroy_work);
 
-	/* configure fc_lport, e.g., em */
+	/* configure a fc_lport including the exchange manager */
 	rc = fcoe_lport_config(lport);
 	if (rc) {
 		FCOE_NETDEV_DBG(netdev, "Could not configure lport for the "
@@ -825,7 +864,7 @@ static struct fc_lport *fcoe_if_create(struct fcoe_interface *fcoe,
 
 	if (npiv) {
 		FCOE_NETDEV_DBG(netdev, "Setting vport names, 0x%llX 0x%llX\n",
-			vport->node_name, vport->port_name);
+				vport->node_name, vport->port_name);
 		fc_set_wwnn(lport, vport->node_name);
 		fc_set_wwpn(lport, vport->port_name);
 	}
@@ -869,7 +908,7 @@ static struct fc_lport *fcoe_if_create(struct fcoe_interface *fcoe,
 		rc = fcoe_em_config(lport);
 		if (rc) {
 			FCOE_NETDEV_DBG(netdev, "Could not configure the EM "
-						"for the interface\n");
+					"for the interface\n");
 			goto out_lp_destroy;
 		}
 	}
@@ -886,9 +925,11 @@ out:
 }
 
 /**
- * fcoe_if_init() - attach to scsi transport
+ * fcoe_if_init() - Initialization routine for fcoe.ko
  *
- * Returns : 0 on success
+ * Attaches the SW FCoE transport to the FC transport
+ *
+ * Returns: 0 on success
  */
 static int __init fcoe_if_init(void)
 {
@@ -906,9 +947,11 @@ static int __init fcoe_if_init(void)
 }
 
 /**
- * fcoe_if_exit() - detach from scsi transport
+ * fcoe_if_exit() - Tear down fcoe.ko
+ *
+ * Detaches the SW FCoE transport from the FC transport
  *
- * Returns : 0 on success
+ * Returns: 0 on success
  */
 int __exit fcoe_if_exit(void)
 {
@@ -920,8 +963,8 @@ int __exit fcoe_if_exit(void)
 }
 
 /**
- * fcoe_percpu_thread_create() - Create a receive thread for an online cpu
- * @cpu: cpu index for the online cpu
+ * fcoe_percpu_thread_create() - Create a receive thread for an online CPU
+ * @cpu: The CPU index of the CPU to create a receive thread for
  */
 static void fcoe_percpu_thread_create(unsigned int cpu)
 {
@@ -944,8 +987,8 @@ static void fcoe_percpu_thread_create(unsigned int cpu)
 }
 
 /**
- * fcoe_percpu_thread_destroy() - removes the rx thread for the given cpu
- * @cpu: cpu index the rx thread is to be removed
+ * fcoe_percpu_thread_destroy() - Remove the receive thread of a CPU
+ * @cpu: The CPU index of the CPU whose receive thread is to be destroyed
  *
  * Destroys a per-CPU Rx thread. Any pending skbs are moved to the
  * current CPU's Rx thread. If the thread being destroyed is bound to
@@ -993,7 +1036,7 @@ static void fcoe_percpu_thread_destroy(unsigned int cpu)
 		} else {
 			/*
 			 * The targeted CPU is not initialized and cannot accept
-			 * new  skbs. Unlock the targeted CPU and drop the skbs
+			 * new	skbs. Unlock the targeted CPU and drop the skbs
 			 * on the CPU that is going offline.
 			 */
 			while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL)
@@ -1034,12 +1077,12 @@ static void fcoe_percpu_thread_destroy(unsigned int cpu)
 }
 
 /**
- * fcoe_cpu_callback() - fcoe cpu hotplug event callback
- * @nfb: callback data block
- * @action: event triggering the callback
- * @hcpu: index for the cpu of this event
+ * fcoe_cpu_callback() - Handler for CPU hotplug events
+ * @nfb:    The callback data block
+ * @action: The event triggering the callback
+ * @hcpu:   The index of the CPU that the event is for
  *
- * This creates or destroys per cpu data for fcoe
+ * This creates or destroys per-CPU data for fcoe
  *
  * Returns NOTIFY_OK always.
  */
@@ -1065,25 +1108,22 @@ static int fcoe_cpu_callback(struct notifier_block *nfb,
 	return NOTIFY_OK;
 }
 
-static struct notifier_block fcoe_cpu_notifier = {
-	.notifier_call = fcoe_cpu_callback,
-};
-
 /**
- * fcoe_rcv() - this is the fcoe receive function called by NET_RX_SOFTIRQ
- * @skb: the receive skb
- * @dev: associated net device
- * @ptype: context
- * @olddev: last device
+ * fcoe_rcv() - Receive packets from a net device
+ * @skb:    The received packet
+ * @netdev: The net device that the packet was received on
+ * @ptype:  The packet type context
+ * @olddev: The last device net device
  *
- * this function will receive the packet and build fc frame and pass it up
+ * This routine is called by NET_RX_SOFTIRQ. It receives a packet, builds a
+ * FC frame and passes the frame to libfc.
  *
  * Returns: 0 for success
  */
-int fcoe_rcv(struct sk_buff *skb, struct net_device *dev,
+int fcoe_rcv(struct sk_buff *skb, struct net_device *netdev,
 	     struct packet_type *ptype, struct net_device *olddev)
 {
-	struct fc_lport *lp;
+	struct fc_lport *lport;
 	struct fcoe_rcv_info *fr;
 	struct fcoe_interface *fcoe;
 	struct fc_frame_header *fh;
@@ -1091,15 +1131,15 @@ int fcoe_rcv(struct sk_buff *skb, struct net_device *dev,
 	unsigned int cpu;
 
 	fcoe = container_of(ptype, struct fcoe_interface, fcoe_packet_type);
-	lp = fcoe->ctlr.lp;
-	if (unlikely(lp == NULL)) {
-		FCOE_NETDEV_DBG(dev, "Cannot find hba structure");
+	lport = fcoe->ctlr.lp;
+	if (unlikely(!lport)) {
+		FCOE_NETDEV_DBG(netdev, "Cannot find hba structure");
 		goto err2;
 	}
-	if (!lp->link_up)
+	if (!lport->link_up)
 		goto err2;
 
-	FCOE_NETDEV_DBG(dev, "skb_info: len:%d data_len:%d head:%p "
+	FCOE_NETDEV_DBG(netdev, "skb_info: len:%d data_len:%d head:%p "
 			"data:%p tail:%p end:%p sum:%d dev:%s",
 			skb->len, skb->data_len, skb->head, skb->data,
 			skb_tail_pointer(skb), skb_end_pointer(skb),
@@ -1107,7 +1147,7 @@ int fcoe_rcv(struct sk_buff *skb, struct net_device *dev,
 
 	/* check for FCOE packet type */
 	if (unlikely(eth_hdr(skb)->h_proto != htons(ETH_P_FCOE))) {
-		FCOE_NETDEV_DBG(dev, "Wrong FC type frame");
+		FCOE_NETDEV_DBG(netdev, "Wrong FC type frame");
 		goto err;
 	}
 
@@ -1116,14 +1156,14 @@ int fcoe_rcv(struct sk_buff *skb, struct net_device *dev,
 	 * and FC headers are pulled into the linear data area.
 	 */
 	if (unlikely((skb->len < FCOE_MIN_FRAME) ||
-	    !pskb_may_pull(skb, FCOE_HEADER_LEN)))
+		     !pskb_may_pull(skb, FCOE_HEADER_LEN)))
 		goto err;
 
 	skb_set_transport_header(skb, sizeof(struct fcoe_hdr));
 	fh = (struct fc_frame_header *) skb_transport_header(skb);
 
 	fr = fcoe_dev_from_skb(skb);
-	fr->fr_dev = lp;
+	fr->fr_dev = lport;
 	fr->ptype = ptype;
 
 	/*
@@ -1145,7 +1185,7 @@ int fcoe_rcv(struct sk_buff *skb, struct net_device *dev,
 		 * the first CPU now. For non-SMP systems this
 		 * will check the same CPU twice.
 		 */
-		FCOE_NETDEV_DBG(dev, "CPU is online, but no receive thread "
+		FCOE_NETDEV_DBG(netdev, "CPU is online, but no receive thread "
 				"ready for incoming skb- using first online "
 				"CPU.\n");
 
@@ -1172,7 +1212,7 @@ int fcoe_rcv(struct sk_buff *skb, struct net_device *dev,
 
 	return 0;
 err:
-	fc_lport_get_stats(lp)->ErrorFrames++;
+	fc_lport_get_stats(lport)->ErrorFrames++;
 
 err2:
 	kfree_skb(skb);
@@ -1180,8 +1220,11 @@ err2:
 }
 
 /**
- * fcoe_start_io() - pass to netdev to start xmit for fcoe
- * @skb: the skb to be xmitted
+ * fcoe_start_io() - Start FCoE I/O
+ * @skb: The packet to be transmitted
+ *
+ * This routine is called from the net device to start transmitting
+ * FCoE packets.
  *
  * Returns: 0 for success
  */
@@ -1199,9 +1242,15 @@ static inline int fcoe_start_io(struct sk_buff *skb)
 }
 
 /**
- * fcoe_get_paged_crc_eof() - in case we need to alloc a page for crc_eof
- * @skb: the skb to be xmitted
- * @tlen: total len
+ * fcoe_get_paged_crc_eof() - Allocate a page to be used for the trailer CRC
+ * @skb:  The packet to be transmitted
+ * @tlen: The total length of the trailer
+ *
+ * This routine allocates a page for frame trailers. The page is re-used if
+ * there is enough room left on it for the current trailer. If there isn't
+ * enough buffer left a new page is allocated for the trailer. Reference to
+ * the page from this function as well as the skbs using the page fragments
+ * ensure that the page is freed at the appropriate time.
  *
  * Returns: 0 for success
  */
@@ -1240,11 +1289,12 @@ static int fcoe_get_paged_crc_eof(struct sk_buff *skb, int tlen)
 }
 
 /**
- * fcoe_fc_crc() - calculates FC CRC in this fcoe skb
- * @fp: the fc_frame containing data to be checksummed
+ * fcoe_fc_crc() - Calculates the CRC for a given frame
+ * @fp: The frame to be checksumed
  *
- * This uses crc32() to calculate the crc for port frame
- * Return   : 32 bit crc
+ * This uses crc32() routine to calculate the CRC for a frame
+ *
+ * Return: The 32 bit CRC value
  */
 u32 fcoe_fc_crc(struct fc_frame *fp)
 {
@@ -1275,13 +1325,13 @@ u32 fcoe_fc_crc(struct fc_frame *fp)
 }
 
 /**
- * fcoe_xmit() - FCoE frame transmit function
- * @lp:	the associated local fcoe
- * @fp: the fc_frame to be transmitted
+ * fcoe_xmit() - Transmit a FCoE frame
+ * @lport: The local port that the frame is to be transmitted for
+ * @fp:	   The frame to be transmitted
  *
- * Return   : 0 for success
+ * Return: 0 for success
  */
-int fcoe_xmit(struct fc_lport *lp, struct fc_frame *fp)
+int fcoe_xmit(struct fc_lport *lport, struct fc_frame *fp)
 {
 	int wlen;
 	u32 crc;
@@ -1293,7 +1343,7 @@ int fcoe_xmit(struct fc_lport *lp, struct fc_frame *fp)
 	unsigned int hlen;		/* header length implies the version */
 	unsigned int tlen;		/* trailer length */
 	unsigned int elen;		/* eth header, may include vlan */
-	struct fcoe_port *port = lport_priv(lp);
+	struct fcoe_port *port = lport_priv(lport);
 	struct fcoe_interface *fcoe = port->fcoe;
 	u8 sof, eof;
 	struct fcoe_hdr *hp;
@@ -1304,13 +1354,13 @@ int fcoe_xmit(struct fc_lport *lp, struct fc_frame *fp)
 	skb = fp_skb(fp);
 	wlen = skb->len / FCOE_WORD_TO_BYTE;
 
-	if (!lp->link_up) {
+	if (!lport->link_up) {
 		kfree_skb(skb);
 		return 0;
 	}
 
 	if (unlikely(fh->fh_r_ctl == FC_RCTL_ELS_REQ) &&
-	    fcoe_ctlr_els_send(&fcoe->ctlr, lp, skb))
+	    fcoe_ctlr_els_send(&fcoe->ctlr, lport, skb))
 		return 0;
 
 	sof = fr_sof(fp);
@@ -1322,7 +1372,7 @@ int fcoe_xmit(struct fc_lport *lp, struct fc_frame *fp)
 	wlen = (skb->len - tlen + sizeof(crc)) / FCOE_WORD_TO_BYTE;
 
 	/* crc offload */
-	if (likely(lp->crc_offload)) {
+	if (likely(lport->crc_offload)) {
 		skb->ip_summed = CHECKSUM_PARTIAL;
 		skb->csum_start = skb_headroom(skb);
 		skb->csum_offset = skb->len;
@@ -1384,7 +1434,7 @@ int fcoe_xmit(struct fc_lport *lp, struct fc_frame *fp)
 	hp->fcoe_sof = sof;
 
 	/* fcoe lso, mss is in max_payload which is non-zero for FCP data */
-	if (lp->seq_offload && fr_max_payload(fp)) {
+	if (lport->seq_offload && fr_max_payload(fp)) {
 		skb_shinfo(skb)->gso_type = SKB_GSO_FCOE;
 		skb_shinfo(skb)->gso_size = fr_max_payload(fp);
 	} else {
@@ -1392,23 +1442,23 @@ int fcoe_xmit(struct fc_lport *lp, struct fc_frame *fp)
 		skb_shinfo(skb)->gso_size = 0;
 	}
 	/* update tx stats: regardless if LLD fails */
-	stats = fc_lport_get_stats(lp);
+	stats = fc_lport_get_stats(lport);
 	stats->TxFrames++;
 	stats->TxWords += wlen;
 
 	/* send down to lld */
-	fr_dev(fp) = lp;
+	fr_dev(fp) = lport;
 	if (port->fcoe_pending_queue.qlen)
-		fcoe_check_wait_queue(lp, skb);
+		fcoe_check_wait_queue(lport, skb);
 	else if (fcoe_start_io(skb))
-		fcoe_check_wait_queue(lp, skb);
+		fcoe_check_wait_queue(lport, skb);
 
 	return 0;
 }
 
 /**
- * fcoe_percpu_flush_done() - Indicate percpu queue flush completion.
- * @skb: the skb being completed.
+ * fcoe_percpu_flush_done() - Indicate per-CPU queue flush completion
+ * @skb: The completed skb (argument required by destructor)
  */
 static void fcoe_percpu_flush_done(struct sk_buff *skb)
 {
@@ -1416,8 +1466,8 @@ static void fcoe_percpu_flush_done(struct sk_buff *skb)
 }
 
 /**
- * fcoe_percpu_receive_thread() - recv thread per cpu
- * @arg: ptr to the fcoe per cpu struct
+ * fcoe_percpu_receive_thread() - The per-CPU packet receive thread
+ * @arg: The per-CPU context
  *
  * Return: 0 for success
  */
@@ -1425,7 +1475,7 @@ int fcoe_percpu_receive_thread(void *arg)
 {
 	struct fcoe_percpu_s *p = arg;
 	u32 fr_len;
-	struct fc_lport *lp;
+	struct fc_lport *lport;
 	struct fcoe_rcv_info *fr;
 	struct fcoe_dev_stats *stats;
 	struct fc_frame_header *fh;
@@ -1452,8 +1502,8 @@ int fcoe_percpu_receive_thread(void *arg)
 		}
 		spin_unlock_bh(&p->fcoe_rx_list.lock);
 		fr = fcoe_dev_from_skb(skb);
-		lp = fr->fr_dev;
-		if (unlikely(lp == NULL)) {
+		lport = fr->fr_dev;
+		if (unlikely(!lport)) {
 			if (skb->destructor != fcoe_percpu_flush_done)
 				FCOE_NETDEV_DBG(skb->dev, "NULL lport in skb");
 			kfree_skb(skb);
@@ -1470,7 +1520,7 @@ int fcoe_percpu_receive_thread(void *arg)
 		/*
 		 * Save source MAC address before discarding header.
 		 */
-		port = lport_priv(lp);
+		port = lport_priv(lport);
 		if (skb_is_nonlinear(skb))
 			skb_linearize(skb);	/* not ideal */
 		mac = eth_hdr(skb)->h_source;
@@ -1482,7 +1532,7 @@ int fcoe_percpu_receive_thread(void *arg)
 		hp = (struct fcoe_hdr *) skb_network_header(skb);
 		fh = (struct fc_frame_header *) skb_transport_header(skb);
 
-		stats = fc_lport_get_stats(lp);
+		stats = fc_lport_get_stats(lport);
 		if (unlikely(FC_FCOE_DECAPS_VER(hp) != FC_FCOE_VER)) {
 			if (stats->ErrorFrames < 5)
 				printk(KERN_WARNING "fcoe: FCoE version "
@@ -1504,7 +1554,7 @@ int fcoe_percpu_receive_thread(void *arg)
 
 		fp = (struct fc_frame *)skb;
 		fc_frame_init(fp);
-		fr_dev(fp) = lp;
+		fr_dev(fp) = lport;
 		fr_sof(fp) = hp->fcoe_sof;
 
 		/* Copy out the CRC and EOF trailer for access */
@@ -1524,7 +1574,8 @@ int fcoe_percpu_receive_thread(void *arg)
 		 * it's solicited data, in which case, the FCP layer would
 		 * check it during the copy.
 		 */
-		if (lp->crc_offload && skb->ip_summed == CHECKSUM_UNNECESSARY)
+		if (lport->crc_offload &&
+		    skb->ip_summed == CHECKSUM_UNNECESSARY)
 			fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED;
 		else
 			fr_flags(fp) |= FCPHF_CRC_UNCHECKED;
@@ -1532,7 +1583,7 @@ int fcoe_percpu_receive_thread(void *arg)
 		fh = fc_frame_header_get(fp);
 		if (fh->fh_r_ctl == FC_RCTL_DD_SOL_DATA &&
 		    fh->fh_type == FC_TYPE_FCP) {
-			fc_exch_recv(lp, fp);
+			fc_exch_recv(lport, fp);
 			continue;
 		}
 		if (fr_flags(fp) & FCPHF_CRC_UNCHECKED) {
@@ -1548,27 +1599,27 @@ int fcoe_percpu_receive_thread(void *arg)
 			}
 			fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED;
 		}
-		fc_exch_recv(lp, fp);
+		fc_exch_recv(lport, fp);
 	}
 	return 0;
 }
 
 /**
- * fcoe_check_wait_queue() - attempt to clear the transmit backlog
- * @lp: the fc_lport
+ * fcoe_check_wait_queue() - Attempt to clear the transmit backlog
+ * @lport: The local port whose backlog is to be cleared
  *
- * This empties the wait_queue, dequeue the head of the wait_queue queue
- * and calls fcoe_start_io() for each packet, if all skb have been
- * transmitted, return qlen or -1 if a error occurs, then restore
- * wait_queue and try again later.
+ * This empties the wait_queue, dequeues the head of the wait_queue queue
+ * and calls fcoe_start_io() for each packet. If all skb have been
+ * transmitted it returns the qlen. If an error occurs it restores
+ * wait_queue (to try again later) and returns -1.
  *
- * The wait_queue is used when the skb transmit fails. skb will go
- * in the wait_queue which will be emptied by the timer function or
+ * The wait_queue is used when the skb transmit fails. The failed skb
+ * will go in the wait_queue which will be emptied by the timer function or
  * by the next skb transmit.
  */
-static void fcoe_check_wait_queue(struct fc_lport *lp, struct sk_buff *skb)
+static void fcoe_check_wait_queue(struct fc_lport *lport, struct sk_buff *skb)
 {
-	struct fcoe_port *port = lport_priv(lp);
+	struct fcoe_port *port = lport_priv(lport);
 	int rc;
 
 	spin_lock_bh(&port->fcoe_pending_queue.lock);
@@ -1600,19 +1651,19 @@ static void fcoe_check_wait_queue(struct fc_lport *lp, struct sk_buff *skb)
 	}
 
 	if (port->fcoe_pending_queue.qlen < FCOE_LOW_QUEUE_DEPTH)
-		lp->qfull = 0;
+		lport->qfull = 0;
 	if (port->fcoe_pending_queue.qlen && !timer_pending(&port->timer))
 		mod_timer(&port->timer, jiffies + 2);
 	port->fcoe_pending_queue_active = 0;
 out:
 	if (port->fcoe_pending_queue.qlen > FCOE_MAX_QUEUE_DEPTH)
-		lp->qfull = 1;
+		lport->qfull = 1;
 	spin_unlock_bh(&port->fcoe_pending_queue.lock);
 	return;
 }
 
 /**
- * fcoe_dev_setup() - setup link change notification interface
+ * fcoe_dev_setup() - Setup the link change notification interface
  */
 static void fcoe_dev_setup(void)
 {
@@ -1620,7 +1671,7 @@ static void fcoe_dev_setup(void)
 }
 
 /**
- * fcoe_dev_cleanup() - cleanup link change notification interface
+ * fcoe_dev_cleanup() - Cleanup the link change notification interface
  */
 static void fcoe_dev_cleanup(void)
 {
@@ -1628,19 +1679,19 @@ static void fcoe_dev_cleanup(void)
 }
 
 /**
- * fcoe_device_notification() - netdev event notification callback
- * @notifier: context of the notification
- * @event: type of event
- * @ptr: fixed array for output parsed ifname
+ * fcoe_device_notification() - Handler for net device events
+ * @notifier: The context of the notification
+ * @event:    The type of event
+ * @ptr:      The net device that the event was on
  *
- * This function is called by the ethernet driver in case of link change event
+ * This function is called by the Ethernet driver in case of link change event.
  *
  * Returns: 0 for success
  */
 static int fcoe_device_notification(struct notifier_block *notifier,
 				    ulong event, void *ptr)
 {
-	struct fc_lport *lp = NULL;
+	struct fc_lport *lport = NULL;
 	struct net_device *netdev = ptr;
 	struct fcoe_interface *fcoe;
 	struct fcoe_port *port;
@@ -1651,11 +1702,11 @@ static int fcoe_device_notification(struct notifier_block *notifier,
 
 	list_for_each_entry(fcoe, &fcoe_hostlist, list) {
 		if (fcoe->netdev == netdev) {
-			lp = fcoe->ctlr.lp;
+			lport = fcoe->ctlr.lp;
 			break;
 		}
 	}
-	if (lp == NULL) {
+	if (!lport) {
 		rc = NOTIFY_DONE;
 		goto out;
 	}
@@ -1672,7 +1723,7 @@ static int fcoe_device_notification(struct notifier_block *notifier,
 		mfs = netdev->mtu - (sizeof(struct fcoe_hdr) +
 				     sizeof(struct fcoe_crc_eof));
 		if (mfs >= FC_MIN_MAX_FRAME)
-			fc_set_mfs(lp, mfs);
+			fc_set_mfs(lport, mfs);
 		break;
 	case NETDEV_REGISTER:
 		break;
@@ -1687,22 +1738,22 @@ static int fcoe_device_notification(struct notifier_block *notifier,
 		FCOE_NETDEV_DBG(netdev, "Unknown event %ld "
 				"from netdev netlink\n", event);
 	}
-	if (link_possible && !fcoe_link_ok(lp))
+	if (link_possible && !fcoe_link_ok(lport))
 		fcoe_ctlr_link_up(&fcoe->ctlr);
 	else if (fcoe_ctlr_link_down(&fcoe->ctlr)) {
-		stats = fc_lport_get_stats(lp);
+		stats = fc_lport_get_stats(lport);
 		stats->LinkFailureCount++;
-		fcoe_clean_pending_queue(lp);
+		fcoe_clean_pending_queue(lport);
 	}
 out:
 	return rc;
 }
 
 /**
- * fcoe_if_to_netdev() - parse a name buffer to get netdev
- * @buffer: incoming buffer to be copied
+ * fcoe_if_to_netdev() - Parse a name buffer to get a net device
+ * @buffer: The name of the net device
  *
- * Returns: NULL or ptr to net_device
+ * Returns: NULL or a ptr to net_device
  */
 static struct net_device *fcoe_if_to_netdev(const char *buffer)
 {
@@ -1720,9 +1771,11 @@ static struct net_device *fcoe_if_to_netdev(const char *buffer)
 }
 
 /**
- * fcoe_destroy() - handles the destroy from sysfs
- * @buffer: expected to be an eth if name
- * @kp: associated kernel param
+ * fcoe_destroy() - Destroy a FCoE interface
+ * @buffer: The name of the Ethernet interface to be destroyed
+ * @kp:	    The associated kernel parameter
+ *
+ * Called from sysfs.
  *
  * Returns: 0 for success
  */
@@ -1769,6 +1822,10 @@ out_nodev:
 	return rc;
 }
 
+/**
+ * fcoe_destroy_work() - Destroy a FCoE port in a deferred work context
+ * @work: Handle to the FCoE port to be destroyed
+ */
 static void fcoe_destroy_work(struct work_struct *work)
 {
 	struct fcoe_port *port;
@@ -1780,9 +1837,11 @@ static void fcoe_destroy_work(struct work_struct *work)
 }
 
 /**
- * fcoe_create() - Handles the create call from sysfs
- * @buffer: expected to be an eth if name
- * @kp: associated kernel param
+ * fcoe_create() - Create a fcoe interface
+ * @buffer: The name of the Ethernet interface to create on
+ * @kp:	    The associated kernel param
+ *
+ * Called from sysfs.
  *
  * Returns: 0 for success
  */
@@ -1861,16 +1920,9 @@ out_nodev:
 	return rc;
 }
 
-module_param_call(create, fcoe_create, NULL, NULL, S_IWUSR);
-__MODULE_PARM_TYPE(create, "string");
-MODULE_PARM_DESC(create, "Create fcoe fcoe using net device passed in.");
-module_param_call(destroy, fcoe_destroy, NULL, NULL, S_IWUSR);
-__MODULE_PARM_TYPE(destroy, "string");
-MODULE_PARM_DESC(destroy, "Destroy fcoe fcoe");
-
 /**
- * fcoe_link_ok() - Check if link is ok for the fc_lport
- * @lp: ptr to the fc_lport
+ * fcoe_link_ok() - Check if the link is OK for a local port
+ * @lport: The local port to check link on
  *
  * Any permanently-disqualifying conditions have been previously checked.
  * This also updates the speed setting, which may change with link for 100/1000.
@@ -1882,26 +1934,26 @@ MODULE_PARM_DESC(destroy, "Destroy fcoe fcoe");
  * Returns: 0 if link is OK for use by FCoE.
  *
  */
-int fcoe_link_ok(struct fc_lport *lp)
+int fcoe_link_ok(struct fc_lport *lport)
 {
-	struct fcoe_port *port = lport_priv(lp);
-	struct net_device *dev = port->fcoe->netdev;
+	struct fcoe_port *port = lport_priv(lport);
+	struct net_device *netdev = port->fcoe->netdev;
 	struct ethtool_cmd ecmd = { ETHTOOL_GSET };
 
-	if ((dev->flags & IFF_UP) && netif_carrier_ok(dev) &&
-	    (!dev_ethtool_get_settings(dev, &ecmd))) {
-		lp->link_supported_speeds &=
+	if ((netdev->flags & IFF_UP) && netif_carrier_ok(netdev) &&
+	    (!dev_ethtool_get_settings(netdev, &ecmd))) {
+		lport->link_supported_speeds &=
 			~(FC_PORTSPEED_1GBIT | FC_PORTSPEED_10GBIT);
 		if (ecmd.supported & (SUPPORTED_1000baseT_Half |
 				      SUPPORTED_1000baseT_Full))
-			lp->link_supported_speeds |= FC_PORTSPEED_1GBIT;
+			lport->link_supported_speeds |= FC_PORTSPEED_1GBIT;
 		if (ecmd.supported & SUPPORTED_10000baseT_Full)
-			lp->link_supported_speeds |=
+			lport->link_supported_speeds |=
 				FC_PORTSPEED_10GBIT;
 		if (ecmd.speed == SPEED_1000)
-			lp->link_speed = FC_PORTSPEED_1GBIT;
+			lport->link_speed = FC_PORTSPEED_1GBIT;
 		if (ecmd.speed == SPEED_10000)
-			lp->link_speed = FC_PORTSPEED_10GBIT;
+			lport->link_speed = FC_PORTSPEED_10GBIT;
 
 		return 0;
 	}
@@ -1909,8 +1961,8 @@ int fcoe_link_ok(struct fc_lport *lp)
 }
 
 /**
- * fcoe_percpu_clean() - Clear the pending skbs for an lport
- * @lp: the fc_lport
+ * fcoe_percpu_clean() - Clear all pending skbs for an local port
+ * @lport: The local port whose skbs are to be cleared
  *
  * Must be called with fcoe_create_mutex held to single-thread completion.
  *
@@ -1919,7 +1971,7 @@ int fcoe_link_ok(struct fc_lport *lp)
  * there no packets that will be handled by the lport, but also that any
  * threads already handling packet have returned.
  */
-void fcoe_percpu_clean(struct fc_lport *lp)
+void fcoe_percpu_clean(struct fc_lport *lport)
 {
 	struct fcoe_percpu_s *pp;
 	struct fcoe_rcv_info *fr;
@@ -1937,7 +1989,7 @@ void fcoe_percpu_clean(struct fc_lport *lp)
 		     skb = next) {
 			next = skb->next;
 			fr = fcoe_dev_from_skb(skb);
-			if (fr->fr_dev == lp) {
+			if (fr->fr_dev == lport) {
 				__skb_unlink(skb, list);
 				kfree_skb(skb);
 			}
@@ -1966,13 +2018,11 @@ void fcoe_percpu_clean(struct fc_lport *lp)
 
 /**
  * fcoe_clean_pending_queue() - Dequeue a skb and free it
- * @lp: the corresponding fc_lport
- *
- * Returns: none
+ * @lport: The local port to dequeue a skb on
  */
-void fcoe_clean_pending_queue(struct fc_lport *lp)
+void fcoe_clean_pending_queue(struct fc_lport *lport)
 {
-	struct fcoe_port  *port = lport_priv(lp);
+	struct fcoe_port  *port = lport_priv(lport);
 	struct sk_buff *skb;
 
 	spin_lock_bh(&port->fcoe_pending_queue.lock);
@@ -1985,10 +2035,10 @@ void fcoe_clean_pending_queue(struct fc_lport *lp)
 }
 
 /**
- * fcoe_reset() - Resets the fcoe
- * @shost: shost the reset is from
+ * fcoe_reset() - Reset a local port
+ * @shost: The SCSI host associated with the local port to be reset
  *
- * Returns: always 0
+ * Returns: Always 0 (return value required by FC transport template)
  */
 int fcoe_reset(struct Scsi_Host *shost)
 {
@@ -1998,30 +2048,33 @@ int fcoe_reset(struct Scsi_Host *shost)
 }
 
 /**
- * fcoe_hostlist_lookup_port() - find the corresponding lport by a given device
- * @dev: this is currently ptr to net_device
+ * fcoe_hostlist_lookup_port() - Find the FCoE interface associated with a net device
+ * @netdev: The net device used as a key
  *
- * Returns: NULL or the located fcoe_port
- * Locking: must be called with the RNL mutex held
+ * Locking: Must be called with the RNL mutex held.
+ *
+ * Returns: NULL or the FCoE interface
  */
 static struct fcoe_interface *
-fcoe_hostlist_lookup_port(const struct net_device *dev)
+fcoe_hostlist_lookup_port(const struct net_device *netdev)
 {
 	struct fcoe_interface *fcoe;
 
 	list_for_each_entry(fcoe, &fcoe_hostlist, list) {
-		if (fcoe->netdev == dev)
+		if (fcoe->netdev == netdev)
 			return fcoe;
 	}
 	return NULL;
 }
 
 /**
- * fcoe_hostlist_lookup() - Find the corresponding lport by netdev
- * @netdev: ptr to net_device
+ * fcoe_hostlist_lookup() - Find the local port associated with a
+ *			    given net device
+ * @netdev: The netdevice used as a key
  *
- * Returns: 0 for success
- * Locking: must be called with the RTNL mutex held
+ * Locking: Must be called with the RTNL mutex held
+ *
+ * Returns: NULL or the local port
  */
 static struct fc_lport *fcoe_hostlist_lookup(const struct net_device *netdev)
 {
@@ -2032,11 +2085,13 @@ static struct fc_lport *fcoe_hostlist_lookup(const struct net_device *netdev)
 }
 
 /**
- * fcoe_hostlist_add() - Add a lport to lports list
- * @lp: ptr to the fc_lport to be added
+ * fcoe_hostlist_add() - Add the FCoE interface identified by a local
+ *			 port to the hostlist
+ * @lport: The local port that identifies the FCoE interface to be added
  *
- * Returns: 0 for success
  * Locking: must be called with the RTNL mutex held
+ *
+ * Returns: 0 for success
  */
 static int fcoe_hostlist_add(const struct fc_lport *lport)
 {
@@ -2053,15 +2108,15 @@ static int fcoe_hostlist_add(const struct fc_lport *lport)
 }
 
 /**
- * fcoe_init() - fcoe module loading initialization
+ * fcoe_init() - Initialize fcoe.ko
  *
- * Returns 0 on success, negative on failure
+ * Returns: 0 on success, or a negative value on failure
  */
 static int __init fcoe_init(void)
 {
+	struct fcoe_percpu_s *p;
 	unsigned int cpu;
 	int rc = 0;
-	struct fcoe_percpu_s *p;
 
 	mutex_lock(&fcoe_config_mutex);
 
@@ -2098,15 +2153,15 @@ out_free:
 module_init(fcoe_init);
 
 /**
- * fcoe_exit() - fcoe module unloading cleanup
+ * fcoe_exit() - Clean up fcoe.ko
  *
- * Returns 0 on success, negative on failure
+ * Returns: 0 on success or a  negative value on failure
  */
 static void __exit fcoe_exit(void)
 {
-	unsigned int cpu;
 	struct fcoe_interface *fcoe, *tmp;
 	struct fcoe_port *port;
+	unsigned int cpu;
 
 	mutex_lock(&fcoe_config_mutex);
 
@@ -2207,10 +2262,12 @@ static void fcoe_logo_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg)
  *
  * Most of the work here is just handed off to the libfc routine.
  */
-static struct fc_seq *fcoe_elsct_send(struct fc_lport *lport,
-		u32 did, struct fc_frame *fp, unsigned int op,
-		void (*resp)(struct fc_seq *, struct fc_frame *, void *),
-		void *arg, u32 timeout)
+static struct fc_seq *fcoe_elsct_send(struct fc_lport *lport, u32 did,
+				      struct fc_frame *fp, unsigned int op,
+				      void (*resp)(struct fc_seq *,
+						   struct fc_frame *,
+						   void *),
+				      void *arg, u32 timeout)
 {
 	struct fcoe_port *port = lport_priv(lport);
 	struct fcoe_interface *fcoe = port->fcoe;
@@ -2339,4 +2396,3 @@ static void fcoe_set_vport_symbolic_name(struct fc_vport *vport)
 	lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, FC_NS_RSPN_ID,
 			     NULL, NULL, lport->e_d_tov);
 }
-
diff --git a/drivers/scsi/fcoe/fcoe.h b/drivers/scsi/fcoe/fcoe.h
index 6460f32..fc2da8a 100644
--- a/drivers/scsi/fcoe/fcoe.h
+++ b/drivers/scsi/fcoe/fcoe.h
@@ -44,7 +44,7 @@ unsigned int fcoe_debug_logging;
 module_param_named(debug_logging, fcoe_debug_logging, int, S_IRUGO|S_IWUSR);
 MODULE_PARM_DESC(debug_logging, "a bit mask of logging levels");
 
-#define FCOE_LOGGING        0x01 /* General logging, not categorized */
+#define FCOE_LOGGING	    0x01 /* General logging, not categorized */
 #define FCOE_NETDEV_LOGGING 0x02 /* Netdevice logging */
 
 #define FCOE_CHECK_LOGGING(LEVEL, CMD)					\
@@ -64,8 +64,13 @@ do {                                                            	\
 			   printk(KERN_INFO "fcoe: %s: " fmt,	\
 				  netdev->name, ##args);)
 
-/*
- * this percpu struct for fcoe
+/**
+ * struct fcoe_percpu_s - The per-CPU context for FCoE receive threads
+ * @thread:	    The thread context
+ * @fcoe_rx_list:   The queue of pending packets to process
+ * @page:	    The memory page for calculating frame trailer CRCs
+ * @crc_eof_offset: The offset into the CRC page pointing to available
+ *		    memory for a new trailer
  */
 struct fcoe_percpu_s {
 	struct task_struct *thread;
@@ -74,38 +79,62 @@ struct fcoe_percpu_s {
 	int crc_eof_offset;
 };
 
-/*
- * an FCoE interface, 1:1 with netdev
+/**
+ * struct fcoe_interface - A FCoE interface
+ * @list:	      Handle for a list of FCoE interfaces
+ * @netdev:	      The associated net device
+ * @fcoe_packet_type: FCoE packet type
+ * @fip_packet_type:  FIP packet type
+ * @ctlr:	      The FCoE controller (for FIP)
+ * @oem:	      The offload exchange manager for all local port
+ *		      instances associated with this port
+ * @kref:	      The kernel reference
+ *
+ * This structure is 1:1 with a net devive.
  */
 struct fcoe_interface {
-	struct list_head list;
-	struct net_device *netdev;
-	struct packet_type  fcoe_packet_type;
-	struct packet_type  fip_packet_type;
-	struct fcoe_ctlr ctlr;
-	struct fc_exch_mgr *oem;		/* offload exchange manager */
-	struct kref kref;
+	struct list_head   list;
+	struct net_device  *netdev;
+	struct packet_type fcoe_packet_type;
+	struct packet_type fip_packet_type;
+	struct fcoe_ctlr   ctlr;
+	struct fc_exch_mgr *oem;
+	struct kref	   kref;
 };
 
-/*
- * the FCoE private structure that's allocated along with the
- * Scsi_Host and libfc fc_lport structures
+/**
+ * struct fcoe_port - The FCoE private structure
+ * @fcoe:		       The associated fcoe interface
+ * @lport:		       The associated local port
+ * @fcoe_pending_queue:	       The pending Rx queue of skbs
+ * @fcoe_pending_queue_active: Indicates if the pending queue is active
+ * @timer:		       The queue timer
+ * @destroy_work:	       Handle for work context
+ *			       (to prevent RTNL deadlocks)
+ * @data_srt_addr:	       Source address for data
+ *
+ * An instance of this structure is to be allocated along with the
+ * Scsi_Host and libfc fc_lport structures.
  */
 struct fcoe_port {
 	struct fcoe_interface *fcoe;
-	struct fc_lport *lport;
-	struct sk_buff_head fcoe_pending_queue;
-	u8	fcoe_pending_queue_active;
-	struct timer_list timer;		/* queue timer */
-	struct work_struct destroy_work;	/* to prevent rtnl deadlocks */
-	u8 data_src_addr[ETH_ALEN];
+	struct fc_lport	      *lport;
+	struct sk_buff_head   fcoe_pending_queue;
+	u8		      fcoe_pending_queue_active;
+	struct timer_list     timer;
+	struct work_struct    destroy_work;
+	u8		      data_src_addr[ETH_ALEN];
 };
 
 #define fcoe_from_ctlr(fip) container_of(fip, struct fcoe_interface, ctlr)
 
-static inline struct net_device *fcoe_netdev(const struct fc_lport *lp)
+/**
+ * fcoe_netdev() - Return the net device associated with a local port
+ * @lport: The local port to get the net device from
+ */
+static inline struct net_device *fcoe_netdev(const struct fc_lport *lport)
 {
-	return ((struct fcoe_port *)lport_priv(lp))->fcoe->netdev;
+	return ((struct fcoe_port *)lport_priv(lport))->fcoe->netdev;
 }
 
 #endif /* _FCOE_H_ */

[PATCH 32/35] libfc: Fix wrong scsi return status under FC_DATA_UNDRUN

[Robert Love]

From: Yi Zou <yi.zou@intel.com>

This bug is exposed when there is a link flap in LLD. Particularly, when it
happens right after a SCSI write command is sent out, no FCP_DATA is sent,
causing fsp->status_code to be set as FC_DATA_UNDRUN in fc_fcp_complete_locked
even no SCSI status is received. Consequently, fc_io_compl treats this as DID_OK.
This results in SCSI returning successful to the initial I/O request even
there is no DATA actually sent. Particularly, if you run an I/O tool w/ data
verification on, the read back for verification is gonna fail.

This is fixed here by checking when FC_DATA_UNDRUN happens, SCSI status is
received w/ FC_SRB_RCV_STATUS set in fsp->state.

Signed-off-by: Yi Zou <yi.zou@intel.com>
Signed-off-by: Robert Love <robert.w.love@intel.com>
---

 drivers/scsi/libfc/fc_fcp.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/drivers/scsi/libfc/fc_fcp.c b/drivers/scsi/libfc/fc_fcp.c
index 7b916cd..858c0b2 100644
--- a/drivers/scsi/libfc/fc_fcp.c
+++ b/drivers/scsi/libfc/fc_fcp.c
@@ -1866,7 +1866,8 @@ static void fc_io_compl(struct fc_fcp_pkt *fsp)
 			 * scsi status is good but transport level
 			 * underrun.
 			 */
-			sc_cmd->result = DID_OK << 16;
+			sc_cmd->result = (fsp->state & FC_SRB_RCV_STATUS ?
+					  DID_OK : DID_ERROR) << 16;
 		} else {
 			/*
 			 * scsi got underrun, this is an error

[PATCH 33/35] fcoe, libfc: use single frame allocation API

[Robert Love]

From: Vasu Dev <vasu.dev@intel.com>

Cleans up frame allocation APIs to have just single fc_frame_alloc API.

Removes _fc_frame_alloc, renames __fc_frame_alloc to _fc_frame_alloc.

Modifies fc_fcp_send_data for removed _fc_frame_alloc, fc_fcp_send_data
was the only user of removed _fc_frame_alloc.

Also Adds check in fc_frame_alloc to do mod by 4 for only non-zero
len value.

This patch is prep work to fix can_queue reducing in next patch.
Single fc_frame_alloc API helps in fixing can_queue reducing in
next patch.

Signed-off-by: Vasu Dev <vasu.dev@intel.com>
Signed-off-by: Robert Love <robert.w.love@intel.com>
---

 drivers/scsi/libfc/fc_fcp.c   |   15 ++++-----------
 drivers/scsi/libfc/fc_frame.c |    6 +++---
 include/scsi/fc_frame.h       |   16 +++-------------
 3 files changed, 10 insertions(+), 27 deletions(-)

diff --git a/drivers/scsi/libfc/fc_fcp.c b/drivers/scsi/libfc/fc_fcp.c
index 858c0b2..e85dc9a 100644
--- a/drivers/scsi/libfc/fc_fcp.c
+++ b/drivers/scsi/libfc/fc_fcp.c
@@ -507,18 +507,11 @@ static int fc_fcp_send_data(struct fc_fcp_pkt *fsp, struct fc_seq *seq,
 			 */
 			if (tlen % 4)
 				using_sg = 0;
-			if (using_sg) {
-				fp = _fc_frame_alloc(lport, 0);
-				if (!fp)
-					return -ENOMEM;
-			} else {
-				fp = fc_frame_alloc(lport, tlen);
-				if (!fp)
-					return -ENOMEM;
+			fp = fc_frame_alloc(lport, using_sg ? 0 : tlen);
+			if (!fp)
+				return -ENOMEM;
 
-				data = (void *)(fr_hdr(fp)) +
-					sizeof(struct fc_frame_header);
-			}
+			data = fc_frame_header_get(fp) + 1;
 			fh_parm_offset = frame_offset;
 			fr_max_payload(fp) = fsp->max_payload;
 		}
diff --git a/drivers/scsi/libfc/fc_frame.c b/drivers/scsi/libfc/fc_frame.c
index 8ddb685..6da01c6 100644
--- a/drivers/scsi/libfc/fc_frame.c
+++ b/drivers/scsi/libfc/fc_frame.c
@@ -51,7 +51,7 @@ EXPORT_SYMBOL(fc_frame_crc_check);
  * Allocate a frame intended to be sent via fcoe_xmit.
  * Get an sk_buff for the frame and set the length.
  */
-struct fc_frame *__fc_frame_alloc(size_t len)
+struct fc_frame *_fc_frame_alloc(size_t len)
 {
 	struct fc_frame *fp;
 	struct sk_buff *skb;
@@ -68,7 +68,7 @@ struct fc_frame *__fc_frame_alloc(size_t len)
 	skb_put(skb, len);
 	return fp;
 }
-EXPORT_SYMBOL(__fc_frame_alloc);
+EXPORT_SYMBOL(_fc_frame_alloc);
 
 struct fc_frame *fc_frame_alloc_fill(struct fc_lport *lp, size_t payload_len)
 {
@@ -78,7 +78,7 @@ struct fc_frame *fc_frame_alloc_fill(struct fc_lport *lp, size_t payload_len)
 	fill = payload_len % 4;
 	if (fill != 0)
 		fill = 4 - fill;
-	fp = __fc_frame_alloc(payload_len + fill);
+	fp = _fc_frame_alloc(payload_len + fill);
 	if (fp) {
 		memset((char *) fr_hdr(fp) + payload_len, 0, fill);
 		/* trim is OK, we just allocated it so there are no fragments */
diff --git a/include/scsi/fc_frame.h b/include/scsi/fc_frame.h
index bfdb7aa..b2b2267 100644
--- a/include/scsi/fc_frame.h
+++ b/include/scsi/fc_frame.h
@@ -97,17 +97,7 @@ static inline void fc_frame_init(struct fc_frame *fp)
 }
 
 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);
-}
+struct fc_frame *_fc_frame_alloc(size_t payload_len);
 
 /*
  * Allocate fc_frame structure and buffer.  Set the initial length to
@@ -121,10 +111,10 @@ static inline struct fc_frame *fc_frame_alloc(struct fc_lport *dev, size_t len)
 	 * 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)
+	if (len && len % 4)
 		fp = fc_frame_alloc_fill(dev, len);
 	else
-		fp = _fc_frame_alloc(dev, len);
+		fp = _fc_frame_alloc(len);
 	return fp;
 }
 

[PATCH 34/35] libfc: reduce can_queue for all FCP frame allocation failures

[Robert Love]

From: Vasu Dev <vasu.dev@intel.com>

Currently can_queue is reduced only if frame alloc fails
during fc_fcp_send_data but frame alloc can fail at several
other places in FCP data path and can_queue needs to be
reduced for any FCP frame alloc failure.

This patch adds fc_fcp_frame_alloc for all FCP frame allocations
and if fc_frame_alloc fails in fc_fcp_frame_alloc then reduce
can_queue in fc_fcp_frame_alloc, this will reduce can_queue for
all FCP frame alloc failures.

This required moving fc_fcp_reduce_can_queue up, to build without
adding its prototype. Also renamed fc_fcp_reduce_can_queue to
fc_fcp_can_queue_ramp_down.

Removes fc_fcp_reduce_can_queue calling from fc_fcp_recv since
not needed with added fc_fcp_frame_alloc reducing can_queue.

Signed-off-by: Vasu Dev <vasu.dev@intel.com>
Signed-off-by: Robert Love <robert.w.love@intel.com>
---

 drivers/scsi/libfc/fc_fcp.c |  102 +++++++++++++++++++++++++------------------
 1 files changed, 59 insertions(+), 43 deletions(-)

diff --git a/drivers/scsi/libfc/fc_fcp.c b/drivers/scsi/libfc/fc_fcp.c
index e85dc9a..8b7950f 100644
--- a/drivers/scsi/libfc/fc_fcp.c
+++ b/drivers/scsi/libfc/fc_fcp.c
@@ -327,6 +327,57 @@ static void fc_fcp_ddp_done(struct fc_fcp_pkt *fsp)
 }
 
 /**
+ * fc_fcp_can_queue_ramp_down() - reduces can_queue
+ * @lport: lport to reduce can_queue
+ *
+ * If we are getting memory allocation failures, then we may
+ * be trying to execute too many commands. We let the running
+ * commands complete or timeout, then try again with a reduced
+ * can_queue. Eventually we will hit the point where we run
+ * on all reserved structs.
+ */
+static void fc_fcp_can_queue_ramp_down(struct fc_lport *lport)
+{
+	struct fc_fcp_internal *si = fc_get_scsi_internal(lport);
+	unsigned long flags;
+	int can_queue;
+
+	spin_lock_irqsave(lport->host->host_lock, flags);
+	if (si->throttled)
+		goto done;
+	si->throttled = 1;
+
+	can_queue = lport->host->can_queue;
+	can_queue >>= 1;
+	if (!can_queue)
+		can_queue = 1;
+	lport->host->can_queue = can_queue;
+	shost_printk(KERN_ERR, lport->host, "libfc: Could not allocate frame.\n"
+		     "Reducing can_queue to %d.\n", can_queue);
+done:
+	spin_unlock_irqrestore(lport->host->host_lock, flags);
+}
+
+/*
+ * fc_fcp_frame_alloc() -  Allocates fc_frame structure and buffer.
+ * @lport:	fc lport struct
+ * @len:	payload length
+ *
+ * Allocates fc_frame structure and buffer but if fails to allocate
+ * then reduce can_queue.
+ */
+static inline struct fc_frame *fc_fcp_frame_alloc(struct fc_lport *lport,
+						  size_t len)
+{
+	struct fc_frame *fp;
+
+	fp = fc_frame_alloc(lport, len);
+	if (!fp)
+		fc_fcp_can_queue_ramp_down(lport);
+	return fp;
+}
+
+/**
  * fc_fcp_recv_data() - Handler for receiving SCSI-FCP data from a target
  * @fsp: The FCP packet the data is on
  * @fp:	 The data frame
@@ -615,38 +666,6 @@ static void fc_fcp_abts_resp(struct fc_fcp_pkt *fsp, struct fc_frame *fp)
 }
 
 /**
- * fc_fcp_reduce_can_queue() - Reduce the can_queue value for a local port
- * @lport: The local port to reduce can_queue on
- *
- * If we are getting memory allocation failures, then we may
- * be trying to execute too many commands. We let the running
- * commands complete or timeout, then try again with a reduced
- * can_queue. Eventually we will hit the point where we run
- * on all reserved structs.
- */
-static void fc_fcp_reduce_can_queue(struct fc_lport *lport)
-{
-	struct fc_fcp_internal *si = fc_get_scsi_internal(lport);
-	unsigned long flags;
-	int can_queue;
-
-	spin_lock_irqsave(lport->host->host_lock, flags);
-	if (si->throttled)
-		goto done;
-	si->throttled = 1;
-
-	can_queue = lport->host->can_queue;
-	can_queue >>= 1;
-	if (!can_queue)
-		can_queue = 1;
-	lport->host->can_queue = can_queue;
-	shost_printk(KERN_ERR, lport->host, "libfc: Could not allocate frame.\n"
-		     "Reducing can_queue to %d.\n", can_queue);
-done:
-	spin_unlock_irqrestore(lport->host->host_lock, flags);
-}
-
-/**
  * fc_fcp_recv() - Reveive an FCP frame
  * @seq: The sequence the frame is on
  * @fp:	 The received frame
@@ -664,8 +683,10 @@ static void fc_fcp_recv(struct fc_seq *seq, struct fc_frame *fp, void *arg)
 	u8 r_ctl;
 	int rc = 0;
 
-	if (IS_ERR(fp))
-		goto errout;
+	if (IS_ERR(fp)) {
+		fc_fcp_error(fsp, fp);
+		return;
+	}
 
 	fh = fc_frame_header_get(fp);
 	r_ctl = fh->fh_r_ctl;
@@ -719,11 +740,6 @@ unlock:
 	fc_fcp_unlock_pkt(fsp);
 out:
 	fc_frame_free(fp);
-errout:
-	if (IS_ERR(fp))
-		fc_fcp_error(fsp, fp);
-	else if (rc == -ENOMEM)
-		fc_fcp_reduce_can_queue(lport);
 }
 
 /**
@@ -885,7 +901,7 @@ static void fc_fcp_complete_locked(struct fc_fcp_pkt *fsp)
 			struct fc_seq *csp;
 
 			csp = lport->tt.seq_start_next(seq);
-			conf_frame = fc_frame_alloc(fsp->lp, 0);
+			conf_frame = fc_fcp_frame_alloc(fsp->lp, 0);
 			if (conf_frame) {
 				f_ctl = FC_FC_SEQ_INIT;
 				f_ctl |= FC_FC_LAST_SEQ | FC_FC_END_SEQ;
@@ -1025,7 +1041,7 @@ static int fc_fcp_cmd_send(struct fc_lport *lport, struct fc_fcp_pkt *fsp,
 	if (fc_fcp_lock_pkt(fsp))
 		return 0;
 
-	fp = fc_frame_alloc(lport, sizeof(fsp->cdb_cmd));
+	fp = fc_fcp_frame_alloc(lport, sizeof(fsp->cdb_cmd));
 	if (!fp) {
 		rc = -1;
 		goto unlock;
@@ -1306,7 +1322,7 @@ static void fc_fcp_rec(struct fc_fcp_pkt *fsp)
 		fc_fcp_complete_locked(fsp);
 		return;
 	}
-	fp = fc_frame_alloc(lport, sizeof(struct fc_els_rec));
+	fp = fc_fcp_frame_alloc(lport, sizeof(struct fc_els_rec));
 	if (!fp)
 		goto retry;
 
@@ -1558,7 +1574,7 @@ static void fc_fcp_srr(struct fc_fcp_pkt *fsp, enum fc_rctl r_ctl, u32 offset)
 	if (!(rpriv->flags & FC_RP_FLAGS_RETRY) ||
 	    rpriv->rp_state != RPORT_ST_READY)
 		goto retry;			/* shouldn't happen */
-	fp = fc_frame_alloc(lport, sizeof(*srr));
+	fp = fc_fcp_frame_alloc(lport, sizeof(*srr));
 	if (!fp)
 		goto retry;
 

[PATCH 35/35] libfc: adds can_queue ramp up

[Robert Love]

From: Vasu Dev <vasu.dev@intel.com>

Adds last_can_queue_ramp_down_time and updates this on every
ramp down. If last_can_queue_ramp_down_time is not zero then
do ramp up on any IO completion in added fc_fcp_can_queue_ramp_up.

Reset last_can_queue_ramp_down_time to zero once can_queue
is ramped up to added max_can_queue limit, this is to avoid any
more ramp up attempts on subsequent IO completion.

The ramp down and up are skipped for FC_CAN_QUEUE_PERIOD
to avoid infrequent changes to can_queue, this required
keeping track of ramp up time also in last_can_queue_ramp_up_time.

Adds code to ramp down can_queue if lp->qfull is set, with added
new ramp up code the can_queue will be increased after
FC_CAN_QUEUE_PERIOD, therefore it is safe to do ramp down
without fsp in this case and will avoid thrash. This required
fc_fcp_can_queue_ramp_down locking change so that it can be
called with Scsi_Host lock held.

Removes si->throttled and fsp state FC_SRB_NOMEM, not needed with
added ramp up code.

Signed-off-by: Vasu Dev <vasu.dev@intel.com>
Signed-off-by: Robert Love <robert.w.love@intel.com>
---

 drivers/scsi/libfc/fc_fcp.c |   78 +++++++++++++++++++++++++++++++++----------
 1 files changed, 59 insertions(+), 19 deletions(-)

diff --git a/drivers/scsi/libfc/fc_fcp.c b/drivers/scsi/libfc/fc_fcp.c
index 8b7950f..8447546 100644
--- a/drivers/scsi/libfc/fc_fcp.c
+++ b/drivers/scsi/libfc/fc_fcp.c
@@ -52,7 +52,6 @@ struct kmem_cache *scsi_pkt_cachep;
 #define FC_SRB_DISCONTIG	(1 << 4)	/* non-sequential data recvd */
 #define FC_SRB_COMPL		(1 << 5)	/* fc_io_compl has been run */
 #define FC_SRB_FCP_PROCESSING_TMO (1 << 6)	/* timer function processing */
-#define FC_SRB_NOMEM		(1 << 7)	/* dropped to out of mem */
 
 #define FC_SRB_READ		(1 << 1)
 #define FC_SRB_WRITE		(1 << 0)
@@ -71,12 +70,16 @@ struct kmem_cache *scsi_pkt_cachep;
  * struct fc_fcp_internal - FCP layer internal data
  * @scsi_pkt_pool:  Memory pool to draw FCP packets from
  * @scsi_pkt_queue: Current FCP packets
- * @throttled:	    The FCP packet queue is throttled
+ * @last_can_queue_ramp_down_time: ramp down time
+ * @last_can_queue_ramp_up_time: ramp up time
+ * @max_can_queue: max can_queue size
  */
 struct fc_fcp_internal {
 	mempool_t	 *scsi_pkt_pool;
 	struct list_head scsi_pkt_queue;
-	u8		 throttled;
+	unsigned long last_can_queue_ramp_down_time;
+	unsigned long last_can_queue_ramp_up_time;
+	int max_can_queue;
 };
 
 #define fc_get_scsi_internal(x)	((struct fc_fcp_internal *)(x)->scsi_priv)
@@ -124,6 +127,7 @@ static void fc_fcp_srr_error(struct fc_fcp_pkt *, struct fc_frame *);
 #define FC_SCSI_TM_TOV		(10 * HZ)
 #define FC_SCSI_REC_TOV		(2 * HZ)
 #define FC_HOST_RESET_TIMEOUT	(30 * HZ)
+#define FC_CAN_QUEUE_PERIOD	(60 * HZ)
 
 #define FC_MAX_ERROR_CNT	5
 #define FC_MAX_RECOV_RETRY	3
@@ -327,6 +331,38 @@ static void fc_fcp_ddp_done(struct fc_fcp_pkt *fsp)
 }
 
 /**
+ * fc_fcp_can_queue_ramp_up() - increases can_queue
+ * @lport: lport to ramp up can_queue
+ *
+ * Locking notes: Called with Scsi_Host lock held
+ */
+static void fc_fcp_can_queue_ramp_up(struct fc_lport *lport)
+{
+	struct fc_fcp_internal *si = fc_get_scsi_internal(lport);
+	int can_queue;
+
+	if (si->last_can_queue_ramp_up_time &&
+	    (time_before(jiffies, si->last_can_queue_ramp_up_time +
+			 FC_CAN_QUEUE_PERIOD)))
+		return;
+
+	if (time_before(jiffies, si->last_can_queue_ramp_down_time +
+			FC_CAN_QUEUE_PERIOD))
+		return;
+
+	si->last_can_queue_ramp_up_time = jiffies;
+
+	can_queue = lport->host->can_queue << 1;
+	if (can_queue >= si->max_can_queue) {
+		can_queue = si->max_can_queue;
+		si->last_can_queue_ramp_down_time = 0;
+	}
+	lport->host->can_queue = can_queue;
+	shost_printk(KERN_ERR, lport->host, "libfc: increased "
+		     "can_queue to %d.\n", can_queue);
+}
+
+/**
  * fc_fcp_can_queue_ramp_down() - reduces can_queue
  * @lport: lport to reduce can_queue
  *
@@ -335,17 +371,20 @@ static void fc_fcp_ddp_done(struct fc_fcp_pkt *fsp)
  * commands complete or timeout, then try again with a reduced
  * can_queue. Eventually we will hit the point where we run
  * on all reserved structs.
+ *
+ * Locking notes: Called with Scsi_Host lock held
  */
 static void fc_fcp_can_queue_ramp_down(struct fc_lport *lport)
 {
 	struct fc_fcp_internal *si = fc_get_scsi_internal(lport);
-	unsigned long flags;
 	int can_queue;
 
-	spin_lock_irqsave(lport->host->host_lock, flags);
-	if (si->throttled)
-		goto done;
-	si->throttled = 1;
+	if (si->last_can_queue_ramp_down_time &&
+	    (time_before(jiffies, si->last_can_queue_ramp_down_time +
+			 FC_CAN_QUEUE_PERIOD)))
+		return;
+
+	si->last_can_queue_ramp_down_time = jiffies;
 
 	can_queue = lport->host->can_queue;
 	can_queue >>= 1;
@@ -354,8 +393,6 @@ static void fc_fcp_can_queue_ramp_down(struct fc_lport *lport)
 	lport->host->can_queue = can_queue;
 	shost_printk(KERN_ERR, lport->host, "libfc: Could not allocate frame.\n"
 		     "Reducing can_queue to %d.\n", can_queue);
-done:
-	spin_unlock_irqrestore(lport->host->host_lock, flags);
 }
 
 /*
@@ -370,10 +407,14 @@ static inline struct fc_frame *fc_fcp_frame_alloc(struct fc_lport *lport,
 						  size_t len)
 {
 	struct fc_frame *fp;
+	unsigned long flags;
 
 	fp = fc_frame_alloc(lport, len);
-	if (!fp)
+	if (!fp) {
+		spin_lock_irqsave(lport->host->host_lock, flags);
 		fc_fcp_can_queue_ramp_down(lport);
+		spin_unlock_irqrestore(lport->host->host_lock, flags);
+	}
 	return fp;
 }
 
@@ -719,8 +760,6 @@ static void fc_fcp_recv(struct fc_seq *seq, struct fc_frame *fp, void *arg)
 				      (size_t) ntohl(dd->ft_burst_len));
 		if (!rc)
 			seq->rec_data = fsp->xfer_len;
-		else if (rc == -ENOMEM)
-			fsp->state |= FC_SRB_NOMEM;
 	} else if (r_ctl == FC_RCTL_DD_SOL_DATA) {
 		/*
 		 * received a DATA frame
@@ -1736,6 +1775,8 @@ int fc_queuecommand(struct scsi_cmnd *sc_cmd, void (*done)(struct scsi_cmnd *))
 	rpriv = rport->dd_data;
 
 	if (!fc_fcp_lport_queue_ready(lport)) {
+		if (lport->qfull)
+			fc_fcp_can_queue_ramp_down(lport);
 		rc = SCSI_MLQUEUE_HOST_BUSY;
 		goto out;
 	}
@@ -1832,13 +1873,11 @@ static void fc_io_compl(struct fc_fcp_pkt *fsp)
 	}
 
 	/*
-	 * if a command timed out while we had to try and throttle IO
-	 * and it is now getting cleaned up, then we are about to
-	 * try again so clear the throttled flag incase we get more
-	 * time outs.
+	 * if can_queue ramp down is done then try can_queue ramp up
+	 * since commands are completing now.
 	 */
-	if (si->throttled && fsp->state & FC_SRB_NOMEM)
-		si->throttled = 0;
+	if (si->last_can_queue_ramp_down_time)
+		fc_fcp_can_queue_ramp_up(lport);
 
 	sc_cmd = fsp->cmd;
 	fsp->cmd = NULL;
@@ -2180,6 +2219,7 @@ int fc_fcp_init(struct fc_lport *lport)
 	if (!si)
 		return -ENOMEM;
 	lport->scsi_priv = si;
+	si->max_can_queue = lport->host->can_queue;
 	INIT_LIST_HEAD(&si->scsi_pkt_queue);
 
 	si->scsi_pkt_pool = mempool_create_slab_pool(2, scsi_pkt_cachep);

Re: [PATCH 35/35] libfc: adds can_queue ramp up

[Mike Christie]

Robert Love wrote:
> From: Vasu Dev <vasu.dev@intel.com>
> 
> Adds last_can_queue_ramp_down_time and updates this on every
> ramp down. If last_can_queue_ramp_down_time is not zero then
> do ramp up on any IO completion in added fc_fcp_can_queue_ramp_up.
> 
> Reset last_can_queue_ramp_down_time to zero once can_queue
> is ramped up to added max_can_queue limit, this is to avoid any
> more ramp up attempts on subsequent IO completion.
> 
> The ramp down and up are skipped for FC_CAN_QUEUE_PERIOD
> to avoid infrequent changes to can_queue, this required
> keeping track of ramp up time also in last_can_queue_ramp_up_time.
> 
> Adds code to ramp down can_queue if lp->qfull is set, with added
> new ramp up code the can_queue will be increased after
> FC_CAN_QUEUE_PERIOD, therefore it is safe to do ramp down
> without fsp in this case and will avoid thrash. This required
> fc_fcp_can_queue_ramp_down locking change so that it can be
> called with Scsi_Host lock held.
> 

It looks like this could be a more common helper like the sdev ramp 
up/down code. Software drivers like iscsi_tcp and drivers that do not 
have hardware cmd limits like ib_iser, srp and cxgb3i could use it. And 
I think this what lpfc wants in lpfc_queuecommand when lpfc_get_scsi_buf 
fails instead of doing lpfc_rampdown_queue_depth.

Re: [PATCH 35/35] libfc: adds can_queue ramp up

[Vasu Dev]

On Mon, 2009-09-14 at 12:18 -0500, Mike Christie wrote:
> Robert Love wrote:
> > From: Vasu Dev <vasu.dev@intel.com>
> > 
> > Adds last_can_queue_ramp_down_time and updates this on every
> > ramp down. If last_can_queue_ramp_down_time is not zero then
> > do ramp up on any IO completion in added fc_fcp_can_queue_ramp_up.
> > 
> > Reset last_can_queue_ramp_down_time to zero once can_queue
> > is ramped up to added max_can_queue limit, this is to avoid any
> > more ramp up attempts on subsequent IO completion.
> > 
> > The ramp down and up are skipped for FC_CAN_QUEUE_PERIOD
> > to avoid infrequent changes to can_queue, this required
> > keeping track of ramp up time also in last_can_queue_ramp_up_time.
> > 
> > Adds code to ramp down can_queue if lp->qfull is set, with added
> > new ramp up code the can_queue will be increased after
> > FC_CAN_QUEUE_PERIOD, therefore it is safe to do ramp down
> > without fsp in this case and will avoid thrash. This required
> > fc_fcp_can_queue_ramp_down locking change so that it can be
> > called with Scsi_Host lock held.
> > 
> 
> It looks like this could be a more common helper like the sdev ramp 
> up/down code. Software drivers like iscsi_tcp and drivers that do not 
> have hardware cmd limits like ib_iser, srp and cxgb3i could use it. 

Added handlers for can_queue ramp up and down are independent of libfc
code and can be easily moved up to scsi-ml as exported function to be
used by more LLDs. In that case added three new fields for can_queue
needs to be added to Scsi_Host for can_queue down/up tracking. 

- can_queue_ramp_down_time
- can_queue_ramp_up_time
- max_can_queue

I'm fine doing this move now or perhaps can be moved later when more LLD
needs added can_queue ramp up/down handlers here. I'd prefer to do this
move when needed by other LLDs so that their current user libfc would
have this fix now instead blocking on other LLD changes after the move.
However I'm fine either way.

> And 
> I think this what lpfc wants in lpfc_queuecommand when lpfc_get_scsi_buf 
> fails instead of doing lpfc_rampdown_queue_depth.

Yeap, make sense instead of changing queue_depth of all scsi_devices.

	Tahnks
	Vasu

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