bnx2x: Add missing afex code

Commit a334872 added afex support but lacked
several logical changes. This lack can cause afex to crash, and also
have a slight effect on other flows (i.e., driver always assumes the Tx ring
has less available buffers than what it actually has).

This patch adds the missing segments, fixing said issues.

Signed-off-by: Yuval Mintz <yuvalmin@broadcom.com>
Signed-off-by: Barak Witkowski <barak@broadcom.com>
Signed-off-by: Dmitry Kravkov <dmitry@broadcom.com>
Signed-off-by: Eilon Greenstein <eilong@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/broadcom/bnx2x/bnx2x_cmn.h

@@ -710,17 +710,15 @@ static inline u16 bnx2x_tx_avail(struct bnx2x *bp,
 	prod = txdata->tx_bd_prod;
 	cons = txdata->tx_bd_cons;
 
-	/* NUM_TX_RINGS = number of "next-page" entries
-	   It will be used as a threshold */
-	used = SUB_S16(prod, cons) + (s16)NUM_TX_RINGS;
+	used = SUB_S16(prod, cons);
 
 #ifdef BNX2X_STOP_ON_ERROR
 	WARN_ON(used < 0);
-	WARN_ON(used > bp->tx_ring_size);
-	WARN_ON((bp->tx_ring_size - used) > MAX_TX_AVAIL);
+	WARN_ON(used > txdata->tx_ring_size);
+	WARN_ON((txdata->tx_ring_size - used) > MAX_TX_AVAIL);
 #endif
 
-	return (s16)(bp->tx_ring_size) - used;
+	return (s16)(txdata->tx_ring_size) - used;
 }
 
 static inline int bnx2x_tx_queue_has_work(struct bnx2x_fp_txdata *txdata)
@@ -1088,6 +1086,7 @@ static inline void bnx2x_init_txdata(struct bnx2x *bp,
 	txdata->txq_index = txq_index;
 	txdata->tx_cons_sb = tx_cons_sb;
 	txdata->parent_fp = fp;
+	txdata->tx_ring_size = IS_FCOE_FP(fp) ? MAX_TX_AVAIL : bp->tx_ring_size;
 
 	DP(NETIF_MSG_IFUP, "created tx data cid %d, txq %d\n",
 	   txdata->cid, txdata->txq_index);

drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c

@@ -7561,8 +7561,14 @@ int bnx2x_set_mac_one(struct bnx2x *bp, u8 *mac,
 	}
 
 	rc = bnx2x_config_vlan_mac(bp, &ramrod_param);
-	if (rc < 0)
+
+	if (rc == -EEXIST) {
+		DP(BNX2X_MSG_SP, "Failed to schedule ADD operations: %d\n", rc);
+		/* do not treat adding same MAC as error */
+		rc = 0;
+	} else if (rc < 0)
 		BNX2X_ERR("%s MAC failed\n", (set ? "Set" : "Del"));
+
 	return rc;
 }
 
@@ -10294,13 +10300,11 @@ static void __devinit bnx2x_get_fcoe_info(struct bnx2x *bp)
 				dev_info.port_hw_config[port].
 				 fcoe_wwn_node_name_lower);
 	} else if (!IS_MF_SD(bp)) {
-		u32 cfg = MF_CFG_RD(bp, func_ext_config[func].func_cfg);
-
 		/*
 		 * Read the WWN info only if the FCoE feature is enabled for
 		 * this function.
 		 */
-		if (cfg & MACP_FUNC_CFG_FLAGS_FCOE_OFFLOAD)
+		if (BNX2X_MF_EXT_PROTOCOL_FCOE(bp) && !CHIP_IS_E1x(bp))
 			bnx2x_get_ext_wwn_info(bp, func);
 
 	} else if (IS_MF_FCOE_SD(bp))
@@ -11073,7 +11077,14 @@ static int bnx2x_set_uc_list(struct bnx2x *bp)
 	netdev_for_each_uc_addr(ha, dev) {
 		rc = bnx2x_set_mac_one(bp, bnx2x_uc_addr(ha), mac_obj, true,
 				       BNX2X_UC_LIST_MAC, &ramrod_flags);
-		if (rc < 0) {
+		if (rc == -EEXIST) {
+			DP(BNX2X_MSG_SP,
+			   "Failed to schedule ADD operations: %d\n", rc);
+			/* do not treat adding same MAC as error */
+			rc = 0;
+
+		} else if (rc < 0) {
+
 			BNX2X_ERR("Failed to schedule ADD operations: %d\n",
 				  rc);
 			return rc;