cxgb4/cxgb4vf: Add link mode mask API to cxgb4 and cxgb4vf

Based on original work by Casey Leedom <leedom@chelsio.com>
Signed-off-by: Ganesh Goudar <ganeshgr@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/chelsio/cxgb4/cxgb4.h

@@ -418,6 +418,7 @@ struct trace_params {
 struct link_config {
 	unsigned short supported;        /* link capabilities */
 	unsigned short advertising;      /* advertised capabilities */
+	unsigned short lp_advertising;   /* peer advertised capabilities */
 	unsigned short requested_speed;  /* speed user has requested */
 	unsigned short speed;            /* actual link speed */
 	unsigned char  requested_fc;     /* flow control user has requested */

drivers/net/ethernet/chelsio/cxgb4/t4_hw.c

@@ -7219,6 +7219,7 @@ void t4_handle_get_port_info(struct port_info *pi, const __be64 *rpl)
 		lc->speed = speed;
 		lc->fc = fc;
 		lc->supported = be16_to_cpu(p->u.info.pcap);
+		lc->lp_advertising = be16_to_cpu(p->u.info.lpacap);
 		t4_os_link_changed(adap, pi->port_id, link_ok);
 	}
 }
@@ -7284,6 +7285,7 @@ static void get_pci_mode(struct adapter *adapter, struct pci_params *p)
 static void init_link_config(struct link_config *lc, unsigned int caps)
 {
 	lc->supported = caps;
+	lc->lp_advertising = 0;
 	lc->requested_speed = 0;
 	lc->speed = 0;
 	lc->requested_fc = lc->fc = PAUSE_RX | PAUSE_TX;

drivers/net/ethernet/chelsio/cxgb4/t4fw_api.h

@@ -2249,20 +2249,20 @@ struct fw_acl_vlan_cmd {
 enum fw_port_cap {
 	FW_PORT_CAP_SPEED_100M		= 0x0001,
 	FW_PORT_CAP_SPEED_1G		= 0x0002,
-	FW_PORT_CAP_SPEED_2_5G		= 0x0004,
+	FW_PORT_CAP_SPEED_25G		= 0x0004,
 	FW_PORT_CAP_SPEED_10G		= 0x0008,
 	FW_PORT_CAP_SPEED_40G		= 0x0010,
 	FW_PORT_CAP_SPEED_100G		= 0x0020,
 	FW_PORT_CAP_FC_RX		= 0x0040,
 	FW_PORT_CAP_FC_TX		= 0x0080,
 	FW_PORT_CAP_ANEG		= 0x0100,
-	FW_PORT_CAP_MDI_0		= 0x0200,
-	FW_PORT_CAP_MDI_1		= 0x0400,
-	FW_PORT_CAP_BEAN		= 0x0800,
-	FW_PORT_CAP_PMA_LPBK		= 0x1000,
-	FW_PORT_CAP_PCS_LPBK		= 0x2000,
-	FW_PORT_CAP_PHYXS_LPBK		= 0x4000,
-	FW_PORT_CAP_FAR_END_LPBK	= 0x8000,
+	FW_PORT_CAP_MDIX		= 0x0200,
+	FW_PORT_CAP_MDIAUTO		= 0x0400,
+	FW_PORT_CAP_FEC			= 0x0800,
+	FW_PORT_CAP_TECHKR		= 0x1000,
+	FW_PORT_CAP_TECHKX4		= 0x2000,
+	FW_PORT_CAP_802_3_PAUSE		= 0x4000,
+	FW_PORT_CAP_802_3_ASM_DIR	= 0x8000,
 };
 
 enum fw_port_mdi {
@@ -2376,7 +2376,8 @@ struct fw_port_cmd {
 			__u8   cbllen;
 			__u8   auxlinfo;
 			__u8   dcbxdis_pkd;
-			__u8   r8_lo[3];
+			__u8   r8_lo;
+			__be16 lpacap;
 			__be64 r9;
 		} info;
 		struct fw_port_diags {
@@ -2555,6 +2556,11 @@ enum fw_port_type {
 	FW_PORT_TYPE_QSA,
 	FW_PORT_TYPE_QSFP,
 	FW_PORT_TYPE_BP40_BA,
+	FW_PORT_TYPE_KR4_100G,
+	FW_PORT_TYPE_CR4_QSFP,
+	FW_PORT_TYPE_CR_QSFP,
+	FW_PORT_TYPE_CR2_QSFP,
+	FW_PORT_TYPE_SFP28,
 
 	FW_PORT_TYPE_NONE = FW_PORT_CMD_PTYPE_M
 };

drivers/net/ethernet/chelsio/cxgb4vf/cxgb4vf_main.c

@@ -1201,105 +1201,187 @@ static void cxgb4vf_poll_controller(struct net_device *dev)
  * state of the port to which we're linked.
  */
 
-static unsigned int t4vf_from_fw_linkcaps(enum fw_port_type type,
-					  unsigned int caps)
-{
-	unsigned int v = 0;
-
-	if (type == FW_PORT_TYPE_BT_SGMII || type == FW_PORT_TYPE_BT_XFI ||
-	    type == FW_PORT_TYPE_BT_XAUI) {
-		v |= SUPPORTED_TP;
-		if (caps & FW_PORT_CAP_SPEED_100M)
-			v |= SUPPORTED_100baseT_Full;
-		if (caps & FW_PORT_CAP_SPEED_1G)
-			v |= SUPPORTED_1000baseT_Full;
-		if (caps & FW_PORT_CAP_SPEED_10G)
-			v |= SUPPORTED_10000baseT_Full;
-	} else if (type == FW_PORT_TYPE_KX4 || type == FW_PORT_TYPE_KX) {
-		v |= SUPPORTED_Backplane;
-		if (caps & FW_PORT_CAP_SPEED_1G)
-			v |= SUPPORTED_1000baseKX_Full;
-		if (caps & FW_PORT_CAP_SPEED_10G)
-			v |= SUPPORTED_10000baseKX4_Full;
-	} else if (type == FW_PORT_TYPE_KR)
-		v |= SUPPORTED_Backplane | SUPPORTED_10000baseKR_Full;
-	else if (type == FW_PORT_TYPE_BP_AP)
-		v |= SUPPORTED_Backplane | SUPPORTED_10000baseR_FEC |
-		     SUPPORTED_10000baseKR_Full | SUPPORTED_1000baseKX_Full;
-	else if (type == FW_PORT_TYPE_BP4_AP)
-		v |= SUPPORTED_Backplane | SUPPORTED_10000baseR_FEC |
-		     SUPPORTED_10000baseKR_Full | SUPPORTED_1000baseKX_Full |
-		     SUPPORTED_10000baseKX4_Full;
-	else if (type == FW_PORT_TYPE_FIBER_XFI ||
-		 type == FW_PORT_TYPE_FIBER_XAUI ||
-		 type == FW_PORT_TYPE_SFP ||
-		 type == FW_PORT_TYPE_QSFP_10G ||
-		 type == FW_PORT_TYPE_QSA) {
-		v |= SUPPORTED_FIBRE;
-		if (caps & FW_PORT_CAP_SPEED_1G)
-			v |= SUPPORTED_1000baseT_Full;
-		if (caps & FW_PORT_CAP_SPEED_10G)
-			v |= SUPPORTED_10000baseT_Full;
-	} else if (type == FW_PORT_TYPE_BP40_BA ||
-		   type == FW_PORT_TYPE_QSFP) {
-		v |= SUPPORTED_40000baseSR4_Full;
-		v |= SUPPORTED_FIBRE;
-	}
-
-	if (caps & FW_PORT_CAP_ANEG)
-		v |= SUPPORTED_Autoneg;
-	return v;
-}
-
-static int cxgb4vf_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
-{
-	const struct port_info *p = netdev_priv(dev);
-
-	if (p->port_type == FW_PORT_TYPE_BT_SGMII ||
-	    p->port_type == FW_PORT_TYPE_BT_XFI ||
-	    p->port_type == FW_PORT_TYPE_BT_XAUI)
-		cmd->port = PORT_TP;
-	else if (p->port_type == FW_PORT_TYPE_FIBER_XFI ||
-		 p->port_type == FW_PORT_TYPE_FIBER_XAUI)
-		cmd->port = PORT_FIBRE;
-	else if (p->port_type == FW_PORT_TYPE_SFP ||
-		 p->port_type == FW_PORT_TYPE_QSFP_10G ||
-		 p->port_type == FW_PORT_TYPE_QSA ||
-		 p->port_type == FW_PORT_TYPE_QSFP) {
-		if (p->mod_type == FW_PORT_MOD_TYPE_LR ||
-		    p->mod_type == FW_PORT_MOD_TYPE_SR ||
-		    p->mod_type == FW_PORT_MOD_TYPE_ER ||
-		    p->mod_type == FW_PORT_MOD_TYPE_LRM)
-			cmd->port = PORT_FIBRE;
-		else if (p->mod_type == FW_PORT_MOD_TYPE_TWINAX_PASSIVE ||
-			 p->mod_type == FW_PORT_MOD_TYPE_TWINAX_ACTIVE)
-			cmd->port = PORT_DA;
+/**
+ *	from_fw_port_mod_type - translate Firmware Port/Module type to Ethtool
+ *	@port_type: Firmware Port Type
+ *	@mod_type: Firmware Module Type
+ *
+ *	Translate Firmware Port/Module type to Ethtool Port Type.
+ */
+static int from_fw_port_mod_type(enum fw_port_type port_type,
+				 enum fw_port_module_type mod_type)
+{
+	if (port_type == FW_PORT_TYPE_BT_SGMII ||
+	    port_type == FW_PORT_TYPE_BT_XFI ||
+	    port_type == FW_PORT_TYPE_BT_XAUI) {
+		return PORT_TP;
+	} else if (port_type == FW_PORT_TYPE_FIBER_XFI ||
+		   port_type == FW_PORT_TYPE_FIBER_XAUI) {
+		return PORT_FIBRE;
+	} else if (port_type == FW_PORT_TYPE_SFP ||
+		   port_type == FW_PORT_TYPE_QSFP_10G ||
+		   port_type == FW_PORT_TYPE_QSA ||
+		   port_type == FW_PORT_TYPE_QSFP) {
+		if (mod_type == FW_PORT_MOD_TYPE_LR ||
+		    mod_type == FW_PORT_MOD_TYPE_SR ||
+		    mod_type == FW_PORT_MOD_TYPE_ER ||
+		    mod_type == FW_PORT_MOD_TYPE_LRM)
+			return PORT_FIBRE;
+		else if (mod_type == FW_PORT_MOD_TYPE_TWINAX_PASSIVE ||
+			 mod_type == FW_PORT_MOD_TYPE_TWINAX_ACTIVE)
+			return PORT_DA;
 		else
-			cmd->port = PORT_OTHER;
-	} else
-		cmd->port = PORT_OTHER;
+			return PORT_OTHER;
+	}
+
+	return PORT_OTHER;
+}
+
+/**
+ *	fw_caps_to_lmm - translate Firmware to ethtool Link Mode Mask
+ *	@port_type: Firmware Port Type
+ *	@fw_caps: Firmware Port Capabilities
+ *	@link_mode_mask: ethtool Link Mode Mask
+ *
+ *	Translate a Firmware Port Capabilities specification to an ethtool
+ *	Link Mode Mask.
+ */
+static void fw_caps_to_lmm(enum fw_port_type port_type,
+			   unsigned int fw_caps,
+			   unsigned long *link_mode_mask)
+{
+	#define SET_LMM(__lmm_name) __set_bit(ETHTOOL_LINK_MODE_ ## __lmm_name\
+			 ## _BIT, link_mode_mask)
+
+	#define FW_CAPS_TO_LMM(__fw_name, __lmm_name) \
+		do { \
+			if (fw_caps & FW_PORT_CAP_ ## __fw_name) \
+				SET_LMM(__lmm_name); \
+		} while (0)
+
+	switch (port_type) {
+	case FW_PORT_TYPE_BT_SGMII:
+	case FW_PORT_TYPE_BT_XFI:
+	case FW_PORT_TYPE_BT_XAUI:
+		SET_LMM(TP);
+		FW_CAPS_TO_LMM(SPEED_100M, 100baseT_Full);
+		FW_CAPS_TO_LMM(SPEED_1G, 1000baseT_Full);
+		FW_CAPS_TO_LMM(SPEED_10G, 10000baseT_Full);
+		break;
+
+	case FW_PORT_TYPE_KX4:
+	case FW_PORT_TYPE_KX:
+		SET_LMM(Backplane);
+		FW_CAPS_TO_LMM(SPEED_1G, 1000baseKX_Full);
+		FW_CAPS_TO_LMM(SPEED_10G, 10000baseKX4_Full);
+		break;
+
+	case FW_PORT_TYPE_KR:
+		SET_LMM(Backplane);
+		SET_LMM(10000baseKR_Full);
+		break;
+
+	case FW_PORT_TYPE_BP_AP:
+		SET_LMM(Backplane);
+		SET_LMM(10000baseR_FEC);
+		SET_LMM(10000baseKR_Full);
+		SET_LMM(1000baseKX_Full);
+		break;
+
+	case FW_PORT_TYPE_BP4_AP:
+		SET_LMM(Backplane);
+		SET_LMM(10000baseR_FEC);
+		SET_LMM(10000baseKR_Full);
+		SET_LMM(1000baseKX_Full);
+		SET_LMM(10000baseKX4_Full);
+		break;
+
+	case FW_PORT_TYPE_FIBER_XFI:
+	case FW_PORT_TYPE_FIBER_XAUI:
+	case FW_PORT_TYPE_SFP:
+	case FW_PORT_TYPE_QSFP_10G:
+	case FW_PORT_TYPE_QSA:
+		SET_LMM(FIBRE);
+		FW_CAPS_TO_LMM(SPEED_1G, 1000baseT_Full);
+		FW_CAPS_TO_LMM(SPEED_10G, 10000baseT_Full);
+		break;
 
-	if (p->mdio_addr >= 0) {
-		cmd->phy_address = p->mdio_addr;
-		cmd->transceiver = XCVR_EXTERNAL;
-		cmd->mdio_support = p->port_type == FW_PORT_TYPE_BT_SGMII ?
-			MDIO_SUPPORTS_C22 : MDIO_SUPPORTS_C45;
+	case FW_PORT_TYPE_BP40_BA:
+	case FW_PORT_TYPE_QSFP:
+		SET_LMM(FIBRE);
+		SET_LMM(40000baseSR4_Full);
+		break;
+
+	case FW_PORT_TYPE_CR_QSFP:
+	case FW_PORT_TYPE_SFP28:
+		SET_LMM(FIBRE);
+		SET_LMM(25000baseCR_Full);
+		break;
+
+	case FW_PORT_TYPE_KR4_100G:
+	case FW_PORT_TYPE_CR4_QSFP:
+		SET_LMM(FIBRE);
+		SET_LMM(100000baseCR4_Full);
+		break;
+
+	default:
+		break;
+	}
+
+	FW_CAPS_TO_LMM(ANEG, Autoneg);
+	FW_CAPS_TO_LMM(802_3_PAUSE, Pause);
+	FW_CAPS_TO_LMM(802_3_ASM_DIR, Asym_Pause);
+
+	#undef FW_CAPS_TO_LMM
+	#undef SET_LMM
+}
+
+static int cxgb4vf_get_link_ksettings(struct net_device *dev,
+				      struct ethtool_link_ksettings
+							*link_ksettings)
+{
+	const struct port_info *pi = netdev_priv(dev);
+	struct ethtool_link_settings *base = &link_ksettings->base;
+
+	ethtool_link_ksettings_zero_link_mode(link_ksettings, supported);
+	ethtool_link_ksettings_zero_link_mode(link_ksettings, advertising);
+	ethtool_link_ksettings_zero_link_mode(link_ksettings, lp_advertising);
+
+	base->port = from_fw_port_mod_type(pi->port_type, pi->mod_type);
+
+	if (pi->mdio_addr >= 0) {
+		base->phy_address = pi->mdio_addr;
+		base->mdio_support = (pi->port_type == FW_PORT_TYPE_BT_SGMII
+				      ? ETH_MDIO_SUPPORTS_C22
+				      : ETH_MDIO_SUPPORTS_C45);
+	} else {
+		base->phy_address = 255;
+		base->mdio_support = 0;
+	}
+
+	fw_caps_to_lmm(pi->port_type, pi->link_cfg.supported,
+		       link_ksettings->link_modes.supported);
+	fw_caps_to_lmm(pi->port_type, pi->link_cfg.advertising,
+		       link_ksettings->link_modes.advertising);
+	fw_caps_to_lmm(pi->port_type, pi->link_cfg.lp_advertising,
+		       link_ksettings->link_modes.lp_advertising);
+
+	if (netif_carrier_ok(dev)) {
+		base->speed = pi->link_cfg.speed;
+		base->duplex = DUPLEX_FULL;
 	} else {
-		cmd->phy_address = 0;  /* not really, but no better option */
-		cmd->transceiver = XCVR_INTERNAL;
-		cmd->mdio_support = 0;
-	}
-
-	cmd->supported = t4vf_from_fw_linkcaps(p->port_type,
-					       p->link_cfg.supported);
-	cmd->advertising = t4vf_from_fw_linkcaps(p->port_type,
-					    p->link_cfg.advertising);
-	ethtool_cmd_speed_set(cmd,
-			      netif_carrier_ok(dev) ? p->link_cfg.speed : 0);
-	cmd->duplex = DUPLEX_FULL;
-	cmd->autoneg = p->link_cfg.autoneg;
-	cmd->maxtxpkt = 0;
-	cmd->maxrxpkt = 0;
+		base->speed = SPEED_UNKNOWN;
+		base->duplex = DUPLEX_UNKNOWN;
+	}
+
+	base->autoneg = pi->link_cfg.autoneg;
+	if (pi->link_cfg.supported & FW_PORT_CAP_ANEG)
+		ethtool_link_ksettings_add_link_mode(link_ksettings,
+						     supported, Autoneg);
+	if (pi->link_cfg.autoneg)
+		ethtool_link_ksettings_add_link_mode(link_ksettings,
+						     advertising, Autoneg);
+
 	return 0;
 }
 
@@ -1675,7 +1757,7 @@ static void cxgb4vf_get_wol(struct net_device *dev,
 #define TSO_FLAGS (NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_TSO_ECN)
 
 static const struct ethtool_ops cxgb4vf_ethtool_ops = {
-	.get_settings		= cxgb4vf_get_settings,
+	.get_link_ksettings	= cxgb4vf_get_link_ksettings,
 	.get_drvinfo		= cxgb4vf_get_drvinfo,
 	.get_msglevel		= cxgb4vf_get_msglevel,
 	.set_msglevel		= cxgb4vf_set_msglevel,

drivers/net/ethernet/chelsio/cxgb4vf/t4vf_common.h

@@ -107,6 +107,7 @@ struct t4vf_port_stats {
 struct link_config {
 	unsigned int   supported;        /* link capabilities */
 	unsigned int   advertising;      /* advertised capabilities */
+	unsigned short lp_advertising;   /* peer advertised capabilities */
 	unsigned short requested_speed;  /* speed user has requested */
 	unsigned short speed;            /* actual link speed */
 	unsigned char  requested_fc;     /* flow control user has requested */

drivers/net/ethernet/chelsio/cxgb4vf/t4vf_hw.c

@@ -328,6 +328,7 @@ int t4vf_wr_mbox_core(struct adapter *adapter, const void *cmd, int size,
 static void init_link_config(struct link_config *lc, unsigned int caps)
 {
 	lc->supported = caps;
+	lc->lp_advertising = 0;
 	lc->requested_speed = 0;
 	lc->speed = 0;
 	lc->requested_fc = lc->fc = PAUSE_RX | PAUSE_TX;
@@ -1743,6 +1744,8 @@ int t4vf_handle_fw_rpl(struct adapter *adapter, const __be64 *rpl)
 				lc->fc = fc;
 				lc->supported =
 					be16_to_cpu(port_cmd->u.info.pcap);
+				lc->lp_advertising =
+					be16_to_cpu(port_cmd->u.info.lpacap);
 				t4vf_os_link_changed(adapter, pidx, link_ok);
 			}
 		}