liquidio: Add the features to show FEC settings and set FEC settings

1. Add functions for get_fecparam and set_fecparam.
2. Modify lio_get_link_ksettings to display FEC setting.
Signed-off-by: Weilin Chang <weilin.chang@cavium.com>
Acked-by: Derek Chickles <derek.chickles@cavium.com>
Signed-off-by: Felix Manlunas <felix.manlunas@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/cavium/liquidio/lio_core.c

@@ -1654,3 +1654,151 @@ int liquidio_get_speed(struct lio *lio)
 
 	return retval;
 }
+
+int liquidio_set_fec(struct lio *lio, int on_off)
+{
+	struct oct_nic_seapi_resp *resp;
+	struct octeon_soft_command *sc;
+	struct octeon_device *oct;
+	union octnet_cmd *ncmd;
+	int retval;
+	u32 var;
+
+	oct = lio->oct_dev;
+
+	if (oct->props[lio->ifidx].fec == on_off)
+		return 0;
+
+	if (!OCTEON_CN23XX_PF(oct)) {
+		dev_err(&oct->pci_dev->dev, "%s: SET FEC only for PF\n",
+			__func__);
+		return -1;
+	}
+
+	if (oct->speed_boot != 25)  {
+		dev_err(&oct->pci_dev->dev,
+			"Set FEC only when link speed is 25G during insmod\n");
+		return -1;
+	}
+
+	sc = octeon_alloc_soft_command(oct, OCTNET_CMD_SIZE,
+				       sizeof(struct oct_nic_seapi_resp), 0);
+
+	ncmd = sc->virtdptr;
+	resp = sc->virtrptr;
+	memset(resp, 0, sizeof(struct oct_nic_seapi_resp));
+
+	init_completion(&sc->complete);
+	sc->sc_status = OCTEON_REQUEST_PENDING;
+
+	ncmd->u64 = 0;
+	ncmd->s.cmd = SEAPI_CMD_FEC_SET;
+	ncmd->s.param1 = on_off;
+	/* SEAPI_CMD_FEC_DISABLE(0) or SEAPI_CMD_FEC_RS(1) */
+
+	octeon_swap_8B_data((u64 *)ncmd, (OCTNET_CMD_SIZE >> 3));
+
+	sc->iq_no = lio->linfo.txpciq[0].s.q_no;
+
+	octeon_prepare_soft_command(oct, sc, OPCODE_NIC,
+				    OPCODE_NIC_UBOOT_CTL, 0, 0, 0);
+
+	retval = octeon_send_soft_command(oct, sc);
+	if (retval == IQ_SEND_FAILED) {
+		dev_info(&oct->pci_dev->dev, "Failed to send soft command\n");
+		octeon_free_soft_command(oct, sc);
+		return -EIO;
+	}
+
+	retval = wait_for_sc_completion_timeout(oct, sc, 0);
+	if (retval)
+		return (-EIO);
+
+	var = be32_to_cpu(resp->fec_setting);
+	resp->fec_setting = var;
+	if (var != on_off) {
+		dev_err(&oct->pci_dev->dev,
+			"Setting failed fec= %x, expect %x\n",
+			var, on_off);
+		oct->props[lio->ifidx].fec = var;
+		if (resp->fec_setting == SEAPI_CMD_FEC_SET_RS)
+			oct->props[lio->ifidx].fec = 1;
+		else
+			oct->props[lio->ifidx].fec = 0;
+	}
+
+	WRITE_ONCE(sc->caller_is_done, true);
+
+	if (oct->props[lio->ifidx].fec !=
+	    oct->props[lio->ifidx].fec_boot) {
+		dev_dbg(&oct->pci_dev->dev,
+			"Reloade driver to chang fec to %s\n",
+			oct->props[lio->ifidx].fec ? "on" : "off");
+	}
+
+	return retval;
+}
+
+int liquidio_get_fec(struct lio *lio)
+{
+	struct oct_nic_seapi_resp *resp;
+	struct octeon_soft_command *sc;
+	struct octeon_device *oct;
+	union octnet_cmd *ncmd;
+	int retval;
+	u32 var;
+
+	oct = lio->oct_dev;
+
+	sc = octeon_alloc_soft_command(oct, OCTNET_CMD_SIZE,
+				       sizeof(struct oct_nic_seapi_resp), 0);
+	if (!sc)
+		return -ENOMEM;
+
+	ncmd = sc->virtdptr;
+	resp = sc->virtrptr;
+	memset(resp, 0, sizeof(struct oct_nic_seapi_resp));
+
+	init_completion(&sc->complete);
+	sc->sc_status = OCTEON_REQUEST_PENDING;
+
+	ncmd->u64 = 0;
+	ncmd->s.cmd = SEAPI_CMD_FEC_GET;
+
+	octeon_swap_8B_data((u64 *)ncmd, (OCTNET_CMD_SIZE >> 3));
+
+	sc->iq_no = lio->linfo.txpciq[0].s.q_no;
+
+	octeon_prepare_soft_command(oct, sc, OPCODE_NIC,
+				    OPCODE_NIC_UBOOT_CTL, 0, 0, 0);
+
+	retval = octeon_send_soft_command(oct, sc);
+	if (retval == IQ_SEND_FAILED) {
+		dev_info(&oct->pci_dev->dev,
+			 "%s: Failed to send soft command\n", __func__);
+		octeon_free_soft_command(oct, sc);
+		return -EIO;
+	}
+
+	retval = wait_for_sc_completion_timeout(oct, sc, 0);
+	if (retval)
+		return retval;
+
+	var = be32_to_cpu(resp->fec_setting);
+	resp->fec_setting = var;
+	if (resp->fec_setting == SEAPI_CMD_FEC_SET_RS)
+		oct->props[lio->ifidx].fec = 1;
+	else
+		oct->props[lio->ifidx].fec = 0;
+
+	WRITE_ONCE(sc->caller_is_done, true);
+
+	if (oct->props[lio->ifidx].fec !=
+	    oct->props[lio->ifidx].fec_boot) {
+		dev_dbg(&oct->pci_dev->dev,
+			"Reloade driver to chang fec to %s\n",
+			oct->props[lio->ifidx].fec ? "on" : "off");
+	}
+
+	return retval;
+}

drivers/net/ethernet/cavium/liquidio/lio_ethtool.c

@@ -244,6 +244,7 @@ static int lio_get_link_ksettings(struct net_device *netdev,
 		    linfo->link.s.if_mode == INTERFACE_MODE_XLAUI ||
 		    linfo->link.s.if_mode == INTERFACE_MODE_XFI) {
 			dev_dbg(&oct->pci_dev->dev, "ecmd->base.transceiver is XCVR_EXTERNAL\n");
+			ecmd->base.transceiver = XCVR_EXTERNAL;
 		} else {
 			dev_err(&oct->pci_dev->dev, "Unknown link interface mode: %d\n",
 				linfo->link.s.if_mode);
@@ -277,10 +278,12 @@ static int lio_get_link_ksettings(struct net_device *netdev,
 						 10000baseCR_Full);
 				}
 
-				if (oct->no_speed_setting == 0)
+				if (oct->no_speed_setting == 0) {
 					liquidio_get_speed(lio);
-				else
+					liquidio_get_fec(lio);
+				} else {
 					oct->speed_setting = 25;
+				}
 
 				if (oct->speed_setting == 10) {
 					ethtool_link_ksettings_add_link_mode
@@ -304,6 +307,24 @@ static int lio_get_link_ksettings(struct net_device *netdev,
 						(ecmd, advertising,
 						 25000baseCR_Full);
 				}
+
+				if (oct->no_speed_setting)
+					break;
+
+				ethtool_link_ksettings_add_link_mode
+					(ecmd, supported, FEC_RS);
+				ethtool_link_ksettings_add_link_mode
+					(ecmd, supported, FEC_NONE);
+					/*FEC_OFF*/
+				if (oct->props[lio->ifidx].fec == 1) {
+					/* ETHTOOL_FEC_RS */
+					ethtool_link_ksettings_add_link_mode
+						(ecmd, advertising, FEC_RS);
+				} else {
+					/* ETHTOOL_FEC_OFF */
+					ethtool_link_ksettings_add_link_mode
+						(ecmd, advertising, FEC_NONE);
+				}
 			} else { /* VF */
 				if (linfo->link.s.speed == 10000) {
 					ethtool_link_ksettings_add_link_mode
@@ -3029,9 +3050,60 @@ static int lio_set_priv_flags(struct net_device *netdev, u32 flags)
 	return 0;
 }
 
+static int lio_get_fecparam(struct net_device *netdev,
+			    struct ethtool_fecparam *fec)
+{
+	struct lio *lio = GET_LIO(netdev);
+	struct octeon_device *oct = lio->oct_dev;
+
+	fec->active_fec = ETHTOOL_FEC_NONE;
+	fec->fec = ETHTOOL_FEC_NONE;
+
+	if (oct->subsystem_id == OCTEON_CN2350_25GB_SUBSYS_ID ||
+	    oct->subsystem_id == OCTEON_CN2360_25GB_SUBSYS_ID) {
+		if (oct->no_speed_setting == 1)
+			return 0;
+
+		liquidio_get_fec(lio);
+		fec->fec = (ETHTOOL_FEC_RS | ETHTOOL_FEC_OFF);
+		if (oct->props[lio->ifidx].fec == 1)
+			fec->active_fec = ETHTOOL_FEC_RS;
+		else
+			fec->active_fec = ETHTOOL_FEC_OFF;
+	}
+
+	return 0;
+}
+
+static int lio_set_fecparam(struct net_device *netdev,
+			    struct ethtool_fecparam *fec)
+{
+	struct lio *lio = GET_LIO(netdev);
+	struct octeon_device *oct = lio->oct_dev;
+
+	if (oct->subsystem_id == OCTEON_CN2350_25GB_SUBSYS_ID ||
+	    oct->subsystem_id == OCTEON_CN2360_25GB_SUBSYS_ID) {
+		if (oct->no_speed_setting == 1)
+			return -EOPNOTSUPP;
+
+		if (fec->fec & ETHTOOL_FEC_OFF)
+			liquidio_set_fec(lio, 0);
+		else if (fec->fec & ETHTOOL_FEC_RS)
+			liquidio_set_fec(lio, 1);
+		else
+			return -EOPNOTSUPP;
+	} else {
+		return -EOPNOTSUPP;
+	}
+
+	return 0;
+}
+
 static const struct ethtool_ops lio_ethtool_ops = {
 	.get_link_ksettings	= lio_get_link_ksettings,
 	.set_link_ksettings	= lio_set_link_ksettings,
+	.get_fecparam		= lio_get_fecparam,
+	.set_fecparam		= lio_set_fecparam,
 	.get_link		= ethtool_op_get_link,
 	.get_drvinfo		= lio_get_drvinfo,
 	.get_ringparam		= lio_ethtool_get_ringparam,

drivers/net/ethernet/cavium/liquidio/lio_main.c

@@ -3761,6 +3761,14 @@ static int setup_nic_devices(struct octeon_device *octeon_dev)
 			octeon_dev->speed_setting = 10;
 		}
 		octeon_dev->speed_boot = octeon_dev->speed_setting;
+
+		/* don't read FEC setting if unsupported by f/w (see above) */
+		if (octeon_dev->speed_boot == 25 &&
+		    !octeon_dev->no_speed_setting) {
+			liquidio_get_fec(lio);
+			octeon_dev->props[lio->ifidx].fec_boot =
+				octeon_dev->props[lio->ifidx].fec;
+		}
 	}
 
 	devlink = devlink_alloc(&liquidio_devlink_ops,

drivers/net/ethernet/cavium/liquidio/liquidio_common.h

@@ -260,6 +260,11 @@ static inline void add_sg_size(struct octeon_sg_entry *sg_entry,
 
 #define   OCTNET_CMD_FAIL 0x1
 
+#define   SEAPI_CMD_FEC_SET             0x0
+#define   SEAPI_CMD_FEC_SET_DISABLE       0x0
+#define   SEAPI_CMD_FEC_SET_RS            0x1
+#define   SEAPI_CMD_FEC_GET             0x1
+
 #define   SEAPI_CMD_SPEED_SET           0x2
 #define   SEAPI_CMD_SPEED_GET           0x3
 

drivers/net/ethernet/cavium/liquidio/octeon_device.h

@@ -316,6 +316,8 @@ struct octdev_props {
 	 * device pointer (used for OS specific calls).
 	 */
 	int    rx_on;
+	int    fec;
+	int    fec_boot;
 	int    napi_enabled;
 	int    gmxport;
 	struct net_device *netdev;

drivers/net/ethernet/cavium/liquidio/octeon_network.h

@@ -84,7 +84,10 @@ struct oct_nic_stats_ctrl {
 
 struct oct_nic_seapi_resp {
 	u64 rh;
+	union {
+		u32 fec_setting;
 		u32 speed;
+	};
 	u64 status;
 };
 
@@ -236,6 +239,8 @@ int lio_setup_glists(struct octeon_device *oct, struct lio *lio, int num_qs);
 
 int liquidio_get_speed(struct lio *lio);
 int liquidio_set_speed(struct lio *lio, int speed);
+int liquidio_get_fec(struct lio *lio);
+int liquidio_set_fec(struct lio *lio, int on_off);
 
 /**
  * \brief Net device change_mtu