qlcnic: Support MAC address, Tx rate config.

o Add support for MAC address and Tx rate configuration
  per VF via iproute2 tool.
o Tx rate change is allowed while the guest is running
  and the VF driver is loaded.
o MAC address change is allowed only when VF driver
  is not loaded.

Signed-off-by: Manish Chopra <[email protected]>
Signed-off-by: Sucheta Chakraborty <[email protected]>
Signed-off-by: Rajesh Borundia <[email protected]>
Signed-off-by: David S. Miller <[email protected]>

Author: Rajesh Borundia

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

@@ -341,6 +341,11 @@ static const struct net_device_ops qlcnic_netdev_ops = {
 #ifdef CONFIG_NET_POLL_CONTROLLER
 	.ndo_poll_controller = qlcnic_poll_controller,
 #endif
+#ifdef CONFIG_QLCNIC_SRIOV
+	.ndo_set_vf_mac		= qlcnic_sriov_set_vf_mac,
+	.ndo_set_vf_tx_rate	= qlcnic_sriov_set_vf_tx_rate,
+	.ndo_get_vf_config	= qlcnic_sriov_get_vf_config,
+#endif
 };
 
 static const struct net_device_ops qlcnic_netdev_failed_ops = {

drivers/net/ethernet/qlogic/qlcnic/qlcnic_sriov.h

@@ -116,6 +116,8 @@ struct qlcnic_resources {
 
 struct qlcnic_vport {
 	u16			handle;
+	u16			max_tx_bw;
+	u16			min_tx_bw;
 	u8			mac[6];
 };
 
@@ -173,6 +175,8 @@ void qlcnic_sriov_cleanup_async_list(struct qlcnic_back_channel *);
 void qlcnic_sriov_cleanup_list(struct qlcnic_trans_list *);
 int __qlcnic_sriov_add_act_list(struct qlcnic_sriov *, struct qlcnic_vf_info *,
 				struct qlcnic_bc_trans *);
+int qlcnic_sriov_get_vf_vport_info(struct qlcnic_adapter *,
+				   struct qlcnic_info *, u16);
 
 static inline bool qlcnic_sriov_enable_check(struct qlcnic_adapter *adapter)
 {
@@ -199,6 +203,10 @@ bool qlcnic_sriov_soft_flr_check(struct qlcnic_adapter *,
 				 struct qlcnic_vf_info *);
 void qlcnic_sriov_pf_reset(struct qlcnic_adapter *);
 int qlcnic_sriov_pf_reinit(struct qlcnic_adapter *);
+int qlcnic_sriov_set_vf_mac(struct net_device *, int, u8 *);
+int qlcnic_sriov_set_vf_tx_rate(struct net_device *, int, int);
+int qlcnic_sriov_get_vf_config(struct net_device *, int ,
+			       struct ifla_vf_info *);
 #else
 static inline void qlcnic_sriov_pf_disable(struct qlcnic_adapter *adapter) {}
 static inline void qlcnic_sriov_pf_cleanup(struct qlcnic_adapter *adapter) {}

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

@@ -181,6 +181,7 @@ int qlcnic_sriov_init(struct qlcnic_adapter *adapter, int num_vfs)
 				goto qlcnic_destroy_async_wq;
 			}
 			sriov->vf_info[i].vp = vp;
+			vp->max_tx_bw = MAX_BW;
 			random_ether_addr(vp->mac);
 			dev_info(&adapter->pdev->dev,
 				 "MAC Address %pM is configured for VF %d\n",
@@ -378,12 +379,83 @@ static void qlcnic_sriov_vf_cfg_buff_desc(struct qlcnic_adapter *adapter)
 	adapter->max_rds_rings = MAX_RDS_RINGS;
 }
 
+int qlcnic_sriov_get_vf_vport_info(struct qlcnic_adapter *adapter,
+				   struct qlcnic_info *npar_info, u16 vport_id)
+{
+	struct device *dev = &adapter->pdev->dev;
+	struct qlcnic_cmd_args cmd;
+	int err;
+	u32 status;
+
+	err = qlcnic_alloc_mbx_args(&cmd, adapter, QLCNIC_CMD_GET_NIC_INFO);
+	if (err)
+		return err;
+
+	cmd.req.arg[1] = vport_id << 16 | 0x1;
+	err = qlcnic_issue_cmd(adapter, &cmd);
+	if (err) {
+		dev_err(&adapter->pdev->dev,
+			"Failed to get vport info, err=%d\n", err);
+		qlcnic_free_mbx_args(&cmd);
+		return err;
+	}
+
+	status = cmd.rsp.arg[2] & 0xffff;
+	if (status & BIT_0)
+		npar_info->min_tx_bw = MSW(cmd.rsp.arg[2]);
+	if (status & BIT_1)
+		npar_info->max_tx_bw = LSW(cmd.rsp.arg[3]);
+	if (status & BIT_2)
+		npar_info->max_tx_ques = MSW(cmd.rsp.arg[3]);
+	if (status & BIT_3)
+		npar_info->max_tx_mac_filters = LSW(cmd.rsp.arg[4]);
+	if (status & BIT_4)
+		npar_info->max_rx_mcast_mac_filters = MSW(cmd.rsp.arg[4]);
+	if (status & BIT_5)
+		npar_info->max_rx_ucast_mac_filters = LSW(cmd.rsp.arg[5]);
+	if (status & BIT_6)
+		npar_info->max_rx_ip_addr = MSW(cmd.rsp.arg[5]);
+	if (status & BIT_7)
+		npar_info->max_rx_lro_flow = LSW(cmd.rsp.arg[6]);
+	if (status & BIT_8)
+		npar_info->max_rx_status_rings = MSW(cmd.rsp.arg[6]);
+	if (status & BIT_9)
+		npar_info->max_rx_buf_rings = LSW(cmd.rsp.arg[7]);
+
+	npar_info->max_rx_ques = MSW(cmd.rsp.arg[7]);
+	npar_info->max_tx_vlan_keys = LSW(cmd.rsp.arg[8]);
+	npar_info->max_local_ipv6_addrs = MSW(cmd.rsp.arg[8]);
+	npar_info->max_remote_ipv6_addrs = LSW(cmd.rsp.arg[9]);
+
+	dev_info(dev, "\n\tmin_tx_bw: %d, max_tx_bw: %d max_tx_ques: %d,\n"
+		 "\tmax_tx_mac_filters: %d max_rx_mcast_mac_filters: %d,\n"
+		 "\tmax_rx_ucast_mac_filters: 0x%x, max_rx_ip_addr: %d,\n"
+		 "\tmax_rx_lro_flow: %d max_rx_status_rings: %d,\n"
+		 "\tmax_rx_buf_rings: %d, max_rx_ques: %d, max_tx_vlan_keys %d\n"
+		 "\tlocal_ipv6_addr: %d, remote_ipv6_addr: %d\n",
+		 npar_info->min_tx_bw, npar_info->max_tx_bw,
+		 npar_info->max_tx_ques, npar_info->max_tx_mac_filters,
+		 npar_info->max_rx_mcast_mac_filters,
+		 npar_info->max_rx_ucast_mac_filters, npar_info->max_rx_ip_addr,
+		 npar_info->max_rx_lro_flow, npar_info->max_rx_status_rings,
+		 npar_info->max_rx_buf_rings, npar_info->max_rx_ques,
+		 npar_info->max_tx_vlan_keys, npar_info->max_local_ipv6_addrs,
+		 npar_info->max_remote_ipv6_addrs);
+
+	qlcnic_free_mbx_args(&cmd);
+	return err;
+}
+
 static int qlcnic_sriov_vf_init_driver(struct qlcnic_adapter *adapter)
 {
 	struct qlcnic_info nic_info;
 	struct qlcnic_hardware_context *ahw = adapter->ahw;
 	int err;
 
+	err = qlcnic_sriov_get_vf_vport_info(adapter, &nic_info, 0);
+	if (err)
+		return err;
+
 	err = qlcnic_get_nic_info(adapter, &nic_info, ahw->pci_func);
 	if (err)
 		return -EIO;

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

@@ -10,6 +10,8 @@
 #include <linux/types.h>
 
 #define QLCNIC_SRIOV_VF_MAX_MAC 1
+#define QLC_VF_MIN_TX_RATE	100
+#define QLC_VF_MAX_TX_RATE	9999
 
 static int qlcnic_sriov_pf_get_vport_handle(struct qlcnic_adapter *, u8);
 
@@ -62,8 +64,9 @@ static int qlcnic_sriov_pf_cal_res_limit(struct qlcnic_adapter *adapter,
 {
 	struct qlcnic_sriov *sriov = adapter->ahw->sriov;
 	struct qlcnic_resources *res = &sriov->ff_max;
-	int ret = -EIO, vpid;
 	u32 temp, num_vf_macs, num_vfs, max;
+	int ret = -EIO, vpid, id;
+	struct qlcnic_vport *vp;
 
 	vpid = qlcnic_sriov_pf_get_vport_handle(adapter, func);
 	if (vpid < 0)
@@ -72,8 +75,6 @@ static int qlcnic_sriov_pf_cal_res_limit(struct qlcnic_adapter *adapter,
 	num_vfs = sriov->num_vfs;
 	max = num_vfs + 1;
 	info->bit_offsets = 0xffff;
-	info->min_tx_bw = 0;
-	info->max_tx_bw = MAX_BW;
 	info->max_tx_ques = res->num_tx_queues / max;
 	info->max_rx_mcast_mac_filters = res->num_rx_mcast_mac_filters;
 	num_vf_macs = QLCNIC_SRIOV_VF_MAX_MAC;
@@ -83,7 +84,15 @@ static int qlcnic_sriov_pf_cal_res_limit(struct qlcnic_adapter *adapter,
 		info->max_rx_ucast_mac_filters = temp;
 		temp = res->num_tx_mac_filters - (num_vfs * num_vf_macs);
 		info->max_tx_mac_filters = temp;
+		info->min_tx_bw = 0;
+		info->max_tx_bw = MAX_BW;
 	} else {
+		id = qlcnic_sriov_func_to_index(adapter, func);
+		if (id < 0)
+			return id;
+		vp = sriov->vf_info[id].vp;
+		info->min_tx_bw = vp->min_tx_bw;
+		info->max_tx_bw = vp->max_tx_bw;
 		info->max_rx_ucast_mac_filters = num_vf_macs;
 		info->max_tx_mac_filters = num_vf_macs;
 	}
@@ -1416,3 +1425,119 @@ int qlcnic_sriov_pf_reinit(struct qlcnic_adapter *adapter)
 		 __func__, ahw->op_mode);
 	return err;
 }
+
+int qlcnic_sriov_set_vf_mac(struct net_device *netdev, int vf, u8 *mac)
+{
+	struct qlcnic_adapter *adapter = netdev_priv(netdev);
+	struct qlcnic_sriov *sriov = adapter->ahw->sriov;
+	int i, num_vfs = sriov->num_vfs;
+	struct qlcnic_vf_info *vf_info;
+	u8 *curr_mac;
+
+	if (!qlcnic_sriov_pf_check(adapter))
+		return -EOPNOTSUPP;
+
+	if (!is_valid_ether_addr(mac) || vf >= num_vfs)
+		return -EINVAL;
+
+	if (!compare_ether_addr(adapter->mac_addr, mac)) {
+		netdev_err(netdev, "MAC address is already in use by the PF\n");
+		return -EINVAL;
+	}
+
+	for (i = 0; i < num_vfs; i++) {
+		vf_info = &sriov->vf_info[i];
+		if (!compare_ether_addr(vf_info->vp->mac, mac)) {
+			netdev_err(netdev,
+				   "MAC address is already in use by VF %d\n",
+				   i);
+			return -EINVAL;
+		}
+	}
+
+	vf_info = &sriov->vf_info[vf];
+	curr_mac = vf_info->vp->mac;
+
+	if (test_bit(QLC_BC_VF_STATE, &vf_info->state)) {
+		netdev_err(netdev,
+			   "MAC address change failed for VF %d, as VF driver is loaded. Please unload VF driver and retry the operation\n",
+			   vf);
+		return -EOPNOTSUPP;
+	}
+
+	memcpy(curr_mac, mac, netdev->addr_len);
+	netdev_info(netdev, "MAC Address %pM  is configured for VF %d\n",
+		    mac, vf);
+	return 0;
+}
+
+int qlcnic_sriov_set_vf_tx_rate(struct net_device *netdev, int vf, int tx_rate)
+{
+	struct qlcnic_adapter *adapter = netdev_priv(netdev);
+	struct qlcnic_sriov *sriov = adapter->ahw->sriov;
+	struct qlcnic_vf_info *vf_info;
+	struct qlcnic_info nic_info;
+	struct qlcnic_vport *vp;
+	u16 vpid;
+
+	if (!qlcnic_sriov_pf_check(adapter))
+		return -EOPNOTSUPP;
+
+	if (vf >= sriov->num_vfs)
+		return -EINVAL;
+
+	if (tx_rate >= 10000 || tx_rate < 100) {
+		netdev_err(netdev,
+			   "Invalid Tx rate, allowed range is [%d - %d]",
+			   QLC_VF_MIN_TX_RATE, QLC_VF_MAX_TX_RATE);
+		return -EINVAL;
+	}
+
+	if (tx_rate == 0)
+		tx_rate = 10000;
+
+	vf_info = &sriov->vf_info[vf];
+	vp = vf_info->vp;
+	vpid = vp->handle;
+
+	if (test_bit(QLC_BC_VF_STATE, &vf_info->state)) {
+		if (qlcnic_sriov_get_vf_vport_info(adapter, &nic_info, vpid))
+			return -EIO;
+
+		nic_info.max_tx_bw = tx_rate / 100;
+		nic_info.bit_offsets = BIT_0;
+
+		if (qlcnic_sriov_pf_set_vport_info(adapter, &nic_info, vpid))
+			return -EIO;
+	}
+
+	vp->max_tx_bw = tx_rate / 100;
+	netdev_info(netdev,
+		    "Setting Tx rate %d (Mbps), %d %% of PF bandwidth, for VF %d\n",
+		    tx_rate, vp->max_tx_bw, vf);
+	return 0;
+}
+
+int qlcnic_sriov_get_vf_config(struct net_device *netdev,
+			       int vf, struct ifla_vf_info *ivi)
+{
+	struct qlcnic_adapter *adapter = netdev_priv(netdev);
+	struct qlcnic_sriov *sriov = adapter->ahw->sriov;
+	struct qlcnic_vport *vp;
+
+	if (!qlcnic_sriov_pf_check(adapter))
+		return -EOPNOTSUPP;
+
+	if (vf >= sriov->num_vfs)
+		return -EINVAL;
+
+	vp = sriov->vf_info[vf].vp;
+	memcpy(&ivi->mac, vp->mac, ETH_ALEN);
+	if (vp->max_tx_bw == MAX_BW)
+		ivi->tx_rate = 0;
+	else
+		ivi->tx_rate = vp->max_tx_bw * 100;
+
+	ivi->vf = vf;
+	return 0;
+}