tg3: Simplify ring control block setup

The current code calls tg3_set_bdinfo() separately on napi0, followed by
a loop that does napi1+. Simplify it by setting bdinfo in the loop for
all napi contexts.

Signed-off-by: Nithin Nayak Sujir <nsujir@broadcom.com>
Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/broadcom/tg3.c

@@ -9239,6 +9239,48 @@ static void __tg3_set_coalesce(struct tg3 *tp, struct ethtool_coalesce *ec)
 	}
 }
 
+/* tp->lock is held. */
+static void tg3_tx_rcbs_init(struct tg3 *tp)
+{
+	int i = 0;
+	u32 txrcb = NIC_SRAM_SEND_RCB;
+
+	if (tg3_flag(tp, ENABLE_TSS))
+		i++;
+
+	for (; i < tp->irq_max; i++, txrcb += TG3_BDINFO_SIZE) {
+		struct tg3_napi *tnapi = &tp->napi[i];
+
+		if (!tnapi->tx_ring)
+			continue;
+
+		tg3_set_bdinfo(tp, txrcb, tnapi->tx_desc_mapping,
+			       (TG3_TX_RING_SIZE << BDINFO_FLAGS_MAXLEN_SHIFT),
+			       NIC_SRAM_TX_BUFFER_DESC);
+	}
+}
+
+/* tp->lock is held. */
+static void tg3_rx_ret_rcbs_init(struct tg3 *tp)
+{
+	int i = 0;
+	u32 rxrcb = NIC_SRAM_RCV_RET_RCB;
+
+	if (tg3_flag(tp, ENABLE_RSS))
+		i++;
+
+	for (; i < tp->irq_max; i++, rxrcb += TG3_BDINFO_SIZE) {
+		struct tg3_napi *tnapi = &tp->napi[i];
+
+		if (!tnapi->rx_rcb)
+			continue;
+
+		tg3_set_bdinfo(tp, rxrcb, tnapi->rx_rcb_mapping,
+			       (tp->rx_ret_ring_mask + 1) <<
+				BDINFO_FLAGS_MAXLEN_SHIFT, 0);
+	}
+}
+
 /* tp->lock is held. */
 static void tg3_rings_reset(struct tg3 *tp)
 {
@@ -9315,9 +9357,6 @@ static void tg3_rings_reset(struct tg3 *tp)
 			tw32_tx_mbox(mbox + i * 8, 0);
 	}
 
-	txrcb = NIC_SRAM_SEND_RCB;
-	rxrcb = NIC_SRAM_RCV_RET_RCB;
-
 	/* Clear status block in ram. */
 	memset(tnapi->hw_status, 0, TG3_HW_STATUS_SIZE);
 
@@ -9327,46 +9366,20 @@ static void tg3_rings_reset(struct tg3 *tp)
 	tw32(HOSTCC_STATUS_BLK_HOST_ADDR + TG3_64BIT_REG_LOW,
 	     ((u64) tnapi->status_mapping & 0xffffffff));
 
-	if (tnapi->tx_ring) {
-		tg3_set_bdinfo(tp, txrcb, tnapi->tx_desc_mapping,
-			       (TG3_TX_RING_SIZE <<
-				BDINFO_FLAGS_MAXLEN_SHIFT),
-			       NIC_SRAM_TX_BUFFER_DESC);
-		txrcb += TG3_BDINFO_SIZE;
-	}
-
-	if (tnapi->rx_rcb) {
-		tg3_set_bdinfo(tp, rxrcb, tnapi->rx_rcb_mapping,
-			       (tp->rx_ret_ring_mask + 1) <<
-				BDINFO_FLAGS_MAXLEN_SHIFT, 0);
-		rxrcb += TG3_BDINFO_SIZE;
-	}
-
 	stblk = HOSTCC_STATBLCK_RING1;
 
 	for (i = 1, tnapi++; i < tp->irq_cnt; i++, tnapi++) {
 		u64 mapping = (u64)tnapi->status_mapping;
 		tw32(stblk + TG3_64BIT_REG_HIGH, mapping >> 32);
 		tw32(stblk + TG3_64BIT_REG_LOW, mapping & 0xffffffff);
+		stblk += 8;
 
 		/* Clear status block in ram. */
 		memset(tnapi->hw_status, 0, TG3_HW_STATUS_SIZE);
-
-		if (tnapi->tx_ring) {
-			tg3_set_bdinfo(tp, txrcb, tnapi->tx_desc_mapping,
-				       (TG3_TX_RING_SIZE <<
-					BDINFO_FLAGS_MAXLEN_SHIFT),
-				       NIC_SRAM_TX_BUFFER_DESC);
-			txrcb += TG3_BDINFO_SIZE;
-		}
-
-		tg3_set_bdinfo(tp, rxrcb, tnapi->rx_rcb_mapping,
-			       ((tp->rx_ret_ring_mask + 1) <<
-				BDINFO_FLAGS_MAXLEN_SHIFT), 0);
-
-		stblk += 8;
-		rxrcb += TG3_BDINFO_SIZE;
 	}
+
+	tg3_tx_rcbs_init(tp);
+	tg3_rx_ret_rcbs_init(tp);
 }
 
 static void tg3_setup_rxbd_thresholds(struct tg3 *tp)