[SCSI] fnic: Add FIP support to the fnic driver

Use libfcoe as a common FIP implementation with fcoe.
FIP or non-FIP mode is fully automatic if the firmware
supports and enables it.

Even if FIP is not supported, this uses libfcoe for the non-FIP
handling of FLOGI and its response.

Use the new lport_set_port_id() notification to capture
successful FLOGI responses and port_id resets.

While transitioning between Ethernet and FC mode, all rx and
tx FC frames are queued.  In Ethernet mode, all frames are
passed to the exchange manager to capture FLOGI responses.

Change to set data_src_addr to the ctl_src_addr whenever it
would have previously been zero because we're not logged in.
This seems safer so we'll never send a frame with a 0 source MAC.
This also eliminates a special case for sending FLOGI frames.

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

1 files changed, 34 insertions, 39 deletions

diff --git a/drivers/scsi/fnic/fnic_scsi.c b/drivers/scsi/fnic/fnic_scsi.c
index 8d26d7a..65a39b0 100644
--- a/drivers/scsi/fnic/fnic_scsi.c
+++ b/drivers/scsi/fnic/fnic_scsi.c
@@ -174,6 +174,9 @@ int fnic_fw_reset_handler(struct fnic *fnic)
 	int ret = 0;
 	unsigned long flags;
 
+	skb_queue_purge(&fnic->frame_queue);
+	skb_queue_purge(&fnic->tx_queue);
+
 	spin_lock_irqsave(&fnic->wq_copy_lock[0], flags);
 
 	if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0])
@@ -200,9 +203,11 @@ int fnic_fw_reset_handler(struct fnic *fnic)
  * fnic_flogi_reg_handler
  * Routine to send flogi register msg to fw
  */
-int fnic_flogi_reg_handler(struct fnic *fnic)
+int fnic_flogi_reg_handler(struct fnic *fnic, u32 fc_id)
 {
 	struct vnic_wq_copy *wq = &fnic->wq_copy[0];
+	enum fcpio_flogi_reg_format_type format;
+	struct fc_lport *lp = fnic->lport;
 	u8 gw_mac[ETH_ALEN];
 	int ret = 0;
 	unsigned long flags;
@@ -217,23 +222,32 @@ int fnic_flogi_reg_handler(struct fnic *fnic)
 		goto flogi_reg_ioreq_end;
 	}
 
-	if (fnic->fcoui_mode)
+	if (fnic->ctlr.map_dest) {
 		memset(gw_mac, 0xff, ETH_ALEN);
-	else
-		memcpy(gw_mac, fnic->dest_addr, ETH_ALEN);
+		format = FCPIO_FLOGI_REG_DEF_DEST;
+	} else {
+		memcpy(gw_mac, fnic->ctlr.dest_addr, ETH_ALEN);
+		format = FCPIO_FLOGI_REG_GW_DEST;
+	}
 
-	fnic_queue_wq_copy_desc_flogi_reg(wq, SCSI_NO_TAG,
-					  FCPIO_FLOGI_REG_GW_DEST,
-					  fnic->s_id,
-					  gw_mac);
+	if ((fnic->config.flags & VFCF_FIP_CAPABLE) && !fnic->ctlr.map_dest) {
+		fnic_queue_wq_copy_desc_fip_reg(wq, SCSI_NO_TAG,
+						fc_id, gw_mac,
+						fnic->data_src_addr,
+						lp->r_a_tov, lp->e_d_tov);
+		FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
+			      "FLOGI FIP reg issued fcid %x src %pM dest %pM\n",
+			      fc_id, fnic->data_src_addr, gw_mac);
+	} else {
+		fnic_queue_wq_copy_desc_flogi_reg(wq, SCSI_NO_TAG,
+						  format, fc_id, gw_mac);
+		FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
+			      "FLOGI reg issued fcid %x map %d dest %pM\n",
+			      fc_id, fnic->ctlr.map_dest, gw_mac);
+	}
 
 flogi_reg_ioreq_end:
 	spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags);
-
-	if (!ret)
-		FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
-			      "flog reg issued\n");
-
 	return ret;
 }
 
@@ -453,7 +467,6 @@ static int fnic_fcpio_fw_reset_cmpl_handler(struct fnic *fnic,
 	u8 hdr_status;
 	struct fcpio_tag tag;
 	int ret = 0;
-	struct fc_frame *flogi;
 	unsigned long flags;
 
 	fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag);
@@ -463,9 +476,6 @@ static int fnic_fcpio_fw_reset_cmpl_handler(struct fnic *fnic,
 
 	spin_lock_irqsave(&fnic->fnic_lock, flags);
 
-	flogi = fnic->flogi;
-	fnic->flogi = NULL;
-
 	/* fnic should be in FC_TRANS_ETH_MODE */
 	if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE) {
 		/* Check status of reset completion */
@@ -506,17 +516,14 @@ static int fnic_fcpio_fw_reset_cmpl_handler(struct fnic *fnic,
 	 * free the flogi frame. Else, send it out
 	 */
 	if (fnic->remove_wait || ret) {
-		fnic->flogi_oxid = FC_XID_UNKNOWN;
 		spin_unlock_irqrestore(&fnic->fnic_lock, flags);
-		if (flogi)
-			dev_kfree_skb_irq(fp_skb(flogi));
+		skb_queue_purge(&fnic->tx_queue);
 		goto reset_cmpl_handler_end;
 	}
 
 	spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 
-	if (flogi)
-		ret = fnic_send_frame(fnic, flogi);
+	fnic_flush_tx(fnic);
 
  reset_cmpl_handler_end:
 	return ret;
@@ -533,18 +540,13 @@ static int fnic_fcpio_flogi_reg_cmpl_handler(struct fnic *fnic,
 	u8 hdr_status;
 	struct fcpio_tag tag;
 	int ret = 0;
-	struct fc_frame *flogi_resp = NULL;
 	unsigned long flags;
-	struct sk_buff *skb;
 
 	fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag);
 
 	/* Update fnic state based on status of flogi reg completion */
 	spin_lock_irqsave(&fnic->fnic_lock, flags);
 
-	flogi_resp = fnic->flogi_resp;
-	fnic->flogi_resp = NULL;
-
 	if (fnic->state == FNIC_IN_ETH_TRANS_FC_MODE) {
 
 		/* Check flogi registration completion status */
@@ -568,25 +570,17 @@ static int fnic_fcpio_flogi_reg_cmpl_handler(struct fnic *fnic,
 		ret = -1;
 	}
 
-	/* Successful flogi reg cmpl, pass frame to LibFC */
-	if (!ret && flogi_resp) {
+	if (!ret) {
 		if (fnic->stop_rx_link_events) {
 			spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 			goto reg_cmpl_handler_end;
 		}
-		skb = (struct sk_buff *)flogi_resp;
-		/* Use fr_flags to indicate whether flogi resp or not */
-		fr_flags(flogi_resp) = 1;
-		fr_dev(flogi_resp) = fnic->lport;
 		spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 
-		skb_queue_tail(&fnic->frame_queue, skb);
+		fnic_flush_tx(fnic);
 		queue_work(fnic_event_queue, &fnic->frame_work);
-
 	} else {
 		spin_unlock_irqrestore(&fnic->fnic_lock, flags);
-		if (flogi_resp)
-			dev_kfree_skb_irq(fp_skb(flogi_resp));
 	}
 
 reg_cmpl_handler_end:
@@ -908,6 +902,7 @@ static int fnic_fcpio_cmpl_handler(struct vnic_dev *vdev,
 		break;
 
 	case FCPIO_FLOGI_REG_CMPL: /* fw completed flogi_reg */
+	case FCPIO_FLOGI_FIP_REG_CMPL: /* fw completed flogi_fip_reg */
 		ret = fnic_fcpio_flogi_reg_cmpl_handler(fnic, desc);
 		break;
 
@@ -1747,7 +1742,7 @@ void fnic_scsi_abort_io(struct fc_lport *lp)
 	fnic->remove_wait = &remove_wait;
 	old_state = fnic->state;
 	fnic->state = FNIC_IN_FC_TRANS_ETH_MODE;
-	vnic_dev_del_addr(fnic->vdev, fnic->data_src_addr);
+	fnic_update_mac_locked(fnic, fnic->ctlr.ctl_src_addr);
 	spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 
 	err = fnic_fw_reset_handler(fnic);
@@ -1787,7 +1782,7 @@ void fnic_scsi_cleanup(struct fc_lport *lp)
 	spin_lock_irqsave(&fnic->fnic_lock, flags);
 	old_state = fnic->state;
 	fnic->state = FNIC_IN_FC_TRANS_ETH_MODE;
-	vnic_dev_del_addr(fnic->vdev, fnic->data_src_addr);
+	fnic_update_mac_locked(fnic, fnic->ctlr.ctl_src_addr);
 	spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 
 	if (fnic_fw_reset_handler(fnic)) {