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-rw-r--r--drivers/scsi/libfc/fc_exch.c329
1 files changed, 177 insertions, 152 deletions
diff --git a/drivers/scsi/libfc/fc_exch.c b/drivers/scsi/libfc/fc_exch.c
index 170cdf4bac9..659bb05287f 100644
--- a/drivers/scsi/libfc/fc_exch.c
+++ b/drivers/scsi/libfc/fc_exch.c
@@ -107,7 +107,6 @@ 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.
@@ -272,7 +271,6 @@ 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.
@@ -372,7 +370,104 @@ 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;
@@ -472,24 +567,6 @@ 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
@@ -570,7 +647,8 @@ 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;
@@ -584,7 +662,6 @@ 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.
@@ -607,7 +684,13 @@ 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;
@@ -618,7 +701,6 @@ 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.
@@ -821,76 +903,15 @@ 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:
@@ -909,7 +930,6 @@ 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.
@@ -1662,6 +1682,68 @@ 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
@@ -1902,63 +1984,6 @@ 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
*/
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-30 04:55:31 +0000