qlcnic: Allow setting TX interrupt coalescing parameters from VF.

o Tx interrupt coalescing parameters can now be set from VF.
o Added validation code in PF to validate the parameters.
Signed-off-by: Sucheta Chakraborty <sucheta.chakraborty@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/qlogic/qlcnic/qlcnic_main.c

@@ -2052,6 +2052,7 @@ void qlcnic_diag_free_res(struct net_device *netdev, int drv_sds_rings)
 
 static int qlcnic_alloc_adapter_resources(struct qlcnic_adapter *adapter)
 {
+	struct qlcnic_hardware_context *ahw = adapter->ahw;
 	int err = 0;
 
 	adapter->recv_ctx = kzalloc(sizeof(struct qlcnic_recv_context),
@@ -2061,6 +2062,18 @@ static int qlcnic_alloc_adapter_resources(struct qlcnic_adapter *adapter)
 		goto err_out;
 	}
 
+	if (qlcnic_83xx_check(adapter)) {
+		ahw->coal.type = QLCNIC_INTR_COAL_TYPE_RX_TX;
+		ahw->coal.tx_time_us = QLCNIC_DEF_INTR_COALESCE_TX_TIME_US;
+		ahw->coal.tx_packets = QLCNIC_DEF_INTR_COALESCE_TX_PACKETS;
+		ahw->coal.rx_time_us = QLCNIC_DEF_INTR_COALESCE_RX_TIME_US;
+		ahw->coal.rx_packets = QLCNIC_DEF_INTR_COALESCE_RX_PACKETS;
+	} else {
+		ahw->coal.type = QLCNIC_INTR_COAL_TYPE_RX;
+		ahw->coal.rx_time_us = QLCNIC_DEF_INTR_COALESCE_RX_TIME_US;
+		ahw->coal.rx_packets = QLCNIC_DEF_INTR_COALESCE_RX_PACKETS;
+	}
+
 	/* clear stats */
 	memset(&adapter->stats, 0, sizeof(adapter->stats));
 err_out:

drivers/net/ethernet/qlogic/qlcnic/qlcnic_sriov_pf.c

@@ -16,6 +16,7 @@
 #define QLC_VF_FLOOD_BIT	BIT_16
 #define QLC_FLOOD_MODE		0x5
 #define QLC_SRIOV_ALLOW_VLAN0	BIT_19
+#define QLC_INTR_COAL_TYPE_MASK	0x7
 
 static int qlcnic_sriov_pf_get_vport_handle(struct qlcnic_adapter *, u8);
 
@@ -1178,19 +1179,41 @@ static int qlcnic_sriov_validate_cfg_intrcoal(struct qlcnic_adapter *adapter,
 {
 	struct qlcnic_nic_intr_coalesce *coal = &adapter->ahw->coal;
 	u16 ctx_id, pkts, time;
+	int err = -EINVAL;
+	u8 type;
 
+	type = cmd->req.arg[1] & QLC_INTR_COAL_TYPE_MASK;
 	ctx_id = cmd->req.arg[1] >> 16;
 	pkts = cmd->req.arg[2] & 0xffff;
 	time = cmd->req.arg[2] >> 16;
 
-	if (ctx_id != vf->rx_ctx_id)
-		return -EINVAL;
-	if (pkts > coal->rx_packets)
-		return -EINVAL;
-	if (time < coal->rx_time_us)
-		return -EINVAL;
+	switch (type) {
+	case QLCNIC_INTR_COAL_TYPE_RX:
+		if (ctx_id != vf->rx_ctx_id || pkts > coal->rx_packets ||
+		    time < coal->rx_time_us)
+			goto err_label;
+		break;
+	case QLCNIC_INTR_COAL_TYPE_TX:
+		if (ctx_id != vf->tx_ctx_id || pkts > coal->tx_packets ||
+		    time < coal->tx_time_us)
+			goto err_label;
+		break;
+	default:
+		netdev_err(adapter->netdev, "Invalid coalescing type 0x%x received\n",
+			   type);
+		return err;
+	}
 
 	return 0;
+
+err_label:
+	netdev_err(adapter->netdev, "Expected: rx_ctx_id 0x%x rx_packets 0x%x rx_time_us 0x%x tx_ctx_id 0x%x tx_packets 0x%x tx_time_us 0x%x\n",
+		   vf->rx_ctx_id, coal->rx_packets, coal->rx_time_us,
+		   vf->tx_ctx_id, coal->tx_packets, coal->tx_time_us);
+	netdev_err(adapter->netdev, "Received: ctx_id 0x%x packets 0x%x time_us 0x%x type 0x%x\n",
+		   ctx_id, pkts, time, type);
+
+	return err;
 }
 
 static int qlcnic_sriov_pf_cfg_intrcoal_cmd(struct qlcnic_bc_trans *tran,