From: Chad Dupuis <cdupuis@marvell.com>
Date: Mon, 24 Jun 2019 01:29:55 -0700
Subject: scsi: bnx2fc: Redo setting source FCoE MAC
Git-commit: 4adb451c8d1656e28a9ec472ccbdc4463205424a
Patch-mainline: v5.3-rc1
References: bsc#1144582

For bnx2fc, the source FCoE MAC is stored in the fcoe_port struct in the
data_src_mac field.  Currently this is set in fcoe_ctlr_recv_flogi which
ends up setting it by simply using fc_fcoe_set_mac() which only uses the
default FCF-MAC.  We still want to store the source FCoE MAC in
port->data_src_mac but we want to snoop the FLOGI response payload so as to
set it in the following method:

1. If a granted_mac is found, use that.

2. If not granted_mac is there but there is a FCF-MAP from the FCF then
   create the MAC from the FCF-MAP and the destination ID from the frame.

3. If there is no FCF-MAP the use the spec. default FCF-MAP and the
   destination ID from the frame.

Signed-off-by: Chad Dupuis <cdupuis@marvell.com>
Signed-off-by: Saurav Kashyap <skashyap@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Acked-by: Lee Duncan <lduncan@suse.com>
---
 drivers/scsi/bnx2fc/bnx2fc_els.c | 56 ++++++++++++++++++++++++++++------------
 1 file changed, 40 insertions(+), 16 deletions(-)

diff --git a/drivers/scsi/bnx2fc/bnx2fc_els.c b/drivers/scsi/bnx2fc/bnx2fc_els.c
index 76e65a32f38c..8de5b70f6727 100644
--- a/drivers/scsi/bnx2fc/bnx2fc_els.c
+++ b/drivers/scsi/bnx2fc/bnx2fc_els.c
@@ -854,33 +854,57 @@ void bnx2fc_process_els_compl(struct bnx2fc_cmd *els_req,
 	kref_put(&els_req->refcount, bnx2fc_cmd_release);
 }
 
+#define		BNX2FC_FCOE_MAC_METHOD_GRANGED_MAC	1
+#define		BNX2FC_FCOE_MAC_METHOD_FCF_MAP		2
+#define		BNX2FC_FCOE_MAC_METHOD_FCOE_SET_MAC	3
 static void bnx2fc_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;
-	u8 op;
+
+	struct fc_frame_header *fh;
+	u8 *granted_mac;
+	u8 fcoe_mac[6];
+	u8 fc_map[3];
+	int method;
 
 	if (IS_ERR(fp))
 		goto done;
 
-	mac = fr_cb(fp)->granted_mac;
-	if (is_zero_ether_addr(mac)) {
-		op = fc_frame_payload_op(fp);
-		if (lport->vport) {
-			if (op == ELS_LS_RJT) {
-				printk(KERN_ERR PFX "bnx2fc_flogi_resp is LS_RJT\n");
-				fc_vport_terminate(lport->vport);
-				fc_frame_free(fp);
-				return;
-			}
-		}
-		fcoe_ctlr_recv_flogi(fip, lport, fp);
+	fh = fc_frame_header_get(fp);
+	granted_mac = fr_cb(fp)->granted_mac;
+
+	/*
+	 * We set the source MAC for FCoE traffic based on the Granted MAC
+	 * address from the switch.
+	 *
+	 * If granted_mac is non-zero, we use that.
+	 * If the granted_mac is zeroed out, create the FCoE MAC based on
+	 * the sel_fcf->fc_map and the d_id fo the FLOGI frame.
+	 * If sel_fcf->fc_map is 0, then we use the default FCF-MAC plus the
+	 * d_id of the FLOGI frame.
+	 */
+	if (!is_zero_ether_addr(granted_mac)) {
+		ether_addr_copy(fcoe_mac, granted_mac);
+		method = BNX2FC_FCOE_MAC_METHOD_GRANGED_MAC;
+	} else if (fip->sel_fcf && fip->sel_fcf->fc_map != 0) {
+		hton24(fc_map, fip->sel_fcf->fc_map);
+		fcoe_mac[0] = fc_map[0];
+		fcoe_mac[1] = fc_map[1];
+		fcoe_mac[2] = fc_map[2];
+		fcoe_mac[3] = fh->fh_d_id[0];
+		fcoe_mac[4] = fh->fh_d_id[1];
+		fcoe_mac[5] = fh->fh_d_id[2];
+		method = BNX2FC_FCOE_MAC_METHOD_FCF_MAP;
+	} else {
+		fc_fcoe_set_mac(fcoe_mac, fh->fh_d_id);
+		method = BNX2FC_FCOE_MAC_METHOD_FCOE_SET_MAC;
 	}
-	if (!is_zero_ether_addr(mac))
-		fip->update_mac(lport, mac);
+
+	BNX2FC_HBA_DBG(lport, "fcoe_mac=%pM method=%d\n", fcoe_mac, method);
+	fip->update_mac(lport, fcoe_mac);
 done:
 	fc_lport_flogi_resp(seq, fp, lport);
 }