liquidio: support use of ethtool to set link speed of CN23XX-225 cards

Support setting the link speed of CN23XX-225 cards (which can do 25Gbps or
10Gbps) via ethtool_ops.set_link_ksettings.

Also fix the function assigned to ethtool_ops.get_link_ksettings to use the
new link_ksettings api completely (instead of partially via
ethtool_convert_legacy_u32_to_link_mode).
Signed-off-by: Weilin Chang <weilin.chang@cavium.com>
Acked-by: Raghu Vatsavayi <raghu.vatsavayi@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

@@ -1481,3 +1481,199 @@ int octnet_get_link_stats(struct net_device *netdev)
 
 	return 0;
 }
+
+static void liquidio_nic_seapi_ctl_callback(struct octeon_device *oct,
+					    u32 status,
+					    void *buf)
+{
+	struct liquidio_nic_seapi_ctl_context *ctx;
+	struct octeon_soft_command *sc = buf;
+
+	ctx = sc->ctxptr;
+
+	oct = lio_get_device(ctx->octeon_id);
+	if (status) {
+		dev_err(&oct->pci_dev->dev, "%s: instruction failed. Status: %llx\n",
+			__func__,
+			CVM_CAST64(status));
+	}
+	ctx->status = status;
+	complete(&ctx->complete);
+}
+
+int liquidio_set_speed(struct lio *lio, int speed)
+{
+	struct liquidio_nic_seapi_ctl_context *ctx;
+	struct octeon_device *oct = lio->oct_dev;
+	struct oct_nic_seapi_resp *resp;
+	struct octeon_soft_command *sc;
+	union octnet_cmd *ncmd;
+	u32 ctx_size;
+	int retval;
+	u32 var;
+
+	if (oct->speed_setting == speed)
+		return 0;
+
+	if (!OCTEON_CN23XX_PF(oct)) {
+		dev_err(&oct->pci_dev->dev, "%s: SET SPEED only for PF\n",
+			__func__);
+		return -EOPNOTSUPP;
+	}
+
+	ctx_size = sizeof(struct liquidio_nic_seapi_ctl_context);
+	sc = octeon_alloc_soft_command(oct, OCTNET_CMD_SIZE,
+				       sizeof(struct oct_nic_seapi_resp),
+				       ctx_size);
+	if (!sc)
+		return -ENOMEM;
+
+	ncmd = sc->virtdptr;
+	ctx  = sc->ctxptr;
+	resp = sc->virtrptr;
+	memset(resp, 0, sizeof(struct oct_nic_seapi_resp));
+
+	ctx->octeon_id = lio_get_device_id(oct);
+	ctx->status = 0;
+	init_completion(&ctx->complete);
+
+	ncmd->u64 = 0;
+	ncmd->s.cmd = SEAPI_CMD_SPEED_SET;
+	ncmd->s.param1 = speed;
+
+	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);
+
+	sc->callback = liquidio_nic_seapi_ctl_callback;
+	sc->callback_arg = sc;
+	sc->wait_time = 5000;
+
+	retval = octeon_send_soft_command(oct, sc);
+	if (retval == IQ_SEND_FAILED) {
+		dev_info(&oct->pci_dev->dev, "Failed to send soft command\n");
+		retval = -EBUSY;
+	} else {
+		/* Wait for response or timeout */
+		if (wait_for_completion_timeout(&ctx->complete,
+						msecs_to_jiffies(10000)) == 0) {
+			dev_err(&oct->pci_dev->dev, "%s: sc timeout\n",
+				__func__);
+			octeon_free_soft_command(oct, sc);
+			return -EINTR;
+		}
+
+		retval = resp->status;
+
+		if (retval) {
+			dev_err(&oct->pci_dev->dev, "%s failed, retval=%d\n",
+				__func__, retval);
+			octeon_free_soft_command(oct, sc);
+			return -EIO;
+		}
+
+		var = be32_to_cpu((__force __be32)resp->speed);
+		if (var != speed) {
+			dev_err(&oct->pci_dev->dev,
+				"%s: setting failed speed= %x, expect %x\n",
+				__func__, var, speed);
+		}
+
+		oct->speed_setting = var;
+	}
+
+	octeon_free_soft_command(oct, sc);
+
+	return retval;
+}
+
+int liquidio_get_speed(struct lio *lio)
+{
+	struct liquidio_nic_seapi_ctl_context *ctx;
+	struct octeon_device *oct = lio->oct_dev;
+	struct oct_nic_seapi_resp *resp;
+	struct octeon_soft_command *sc;
+	union octnet_cmd *ncmd;
+	u32 ctx_size;
+	int retval;
+
+	ctx_size = sizeof(struct liquidio_nic_seapi_ctl_context);
+	sc = octeon_alloc_soft_command(oct, OCTNET_CMD_SIZE,
+				       sizeof(struct oct_nic_seapi_resp),
+				       ctx_size);
+	if (!sc)
+		return -ENOMEM;
+
+	ncmd = sc->virtdptr;
+	ctx  = sc->ctxptr;
+	resp = sc->virtrptr;
+	memset(resp, 0, sizeof(struct oct_nic_seapi_resp));
+
+	ctx->octeon_id = lio_get_device_id(oct);
+	ctx->status = 0;
+	init_completion(&ctx->complete);
+
+	ncmd->u64 = 0;
+	ncmd->s.cmd = SEAPI_CMD_SPEED_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);
+
+	sc->callback = liquidio_nic_seapi_ctl_callback;
+	sc->callback_arg = sc;
+	sc->wait_time = 5000;
+
+	retval = octeon_send_soft_command(oct, sc);
+	if (retval == IQ_SEND_FAILED) {
+		dev_info(&oct->pci_dev->dev, "Failed to send soft command\n");
+		oct->no_speed_setting = 1;
+		oct->speed_setting = 25;
+
+		retval = -EBUSY;
+	} else {
+		if (wait_for_completion_timeout(&ctx->complete,
+						msecs_to_jiffies(10000)) == 0) {
+			dev_err(&oct->pci_dev->dev, "%s: sc timeout\n",
+				__func__);
+
+			oct->speed_setting = 25;
+			oct->no_speed_setting = 1;
+
+			octeon_free_soft_command(oct, sc);
+
+			return -EINTR;
+		}
+		retval = resp->status;
+		if (retval) {
+			dev_err(&oct->pci_dev->dev,
+				"%s failed retval=%d\n", __func__, retval);
+			oct->no_speed_setting = 1;
+			oct->speed_setting = 25;
+			octeon_free_soft_command(oct, sc);
+			retval = -EIO;
+		} else {
+			u32 var;
+
+			var = be32_to_cpu((__force __be32)resp->speed);
+			oct->speed_setting = var;
+			if (var == 0xffff) {
+				oct->no_speed_setting = 1;
+				/* unable to access boot variables
+				 * get the default value based on the NIC type
+				 */
+				oct->speed_setting = 25;
+			}
+		}
+	}
+
+	octeon_free_soft_command(oct, sc);
+
+	return retval;
+}

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

@@ -230,46 +230,147 @@ static int lio_get_link_ksettings(struct net_device *netdev,
 	struct lio *lio = GET_LIO(netdev);
 	struct octeon_device *oct = lio->oct_dev;
 	struct oct_link_info *linfo;
-	u32 supported = 0, advertising = 0;
 
 	linfo = &lio->linfo;
 
+	ethtool_link_ksettings_zero_link_mode(ecmd, supported);
+	ethtool_link_ksettings_zero_link_mode(ecmd, advertising);
+
 	switch (linfo->link.s.phy_type) {
 	case LIO_PHY_PORT_TP:
 		ecmd->base.port = PORT_TP;
-		supported = (SUPPORTED_10000baseT_Full |
-			     SUPPORTED_TP | SUPPORTED_Pause);
-		advertising = (ADVERTISED_10000baseT_Full | ADVERTISED_Pause);
 		ecmd->base.autoneg = AUTONEG_DISABLE;
-		break;
-
-	case LIO_PHY_PORT_FIBRE:
-		ecmd->base.port = PORT_FIBRE;
+		ethtool_link_ksettings_add_link_mode(ecmd, supported, TP);
+		ethtool_link_ksettings_add_link_mode(ecmd, supported, Pause);
+		ethtool_link_ksettings_add_link_mode(ecmd, supported,
+						     10000baseT_Full);
 
-		if (linfo->link.s.speed == SPEED_10000) {
-			supported = SUPPORTED_10000baseT_Full;
-			advertising = ADVERTISED_10000baseT_Full;
-		}
+		ethtool_link_ksettings_add_link_mode(ecmd, advertising, Pause);
+		ethtool_link_ksettings_add_link_mode(ecmd, advertising,
+						     10000baseT_Full);
 
-		supported |= SUPPORTED_FIBRE | SUPPORTED_Pause;
-		advertising |= ADVERTISED_Pause;
-		ecmd->base.autoneg = AUTONEG_DISABLE;
 		break;
-	}
 
+	case LIO_PHY_PORT_FIBRE:
 		if (linfo->link.s.if_mode == INTERFACE_MODE_XAUI ||
 		    linfo->link.s.if_mode == INTERFACE_MODE_RXAUI ||
 		    linfo->link.s.if_mode == INTERFACE_MODE_XLAUI ||
 		    linfo->link.s.if_mode == INTERFACE_MODE_XFI) {
-		ethtool_convert_legacy_u32_to_link_mode(
-			ecmd->link_modes.supported, supported);
-		ethtool_convert_legacy_u32_to_link_mode(
-			ecmd->link_modes.advertising, advertising);
+			dev_dbg(&oct->pci_dev->dev, "ecmd->base.transceiver is XCVR_EXTERNAL\n");
 		} else {
-		dev_err(&oct->pci_dev->dev, "Unknown link interface reported %d\n",
+			dev_err(&oct->pci_dev->dev, "Unknown link interface mode: %d\n",
 				linfo->link.s.if_mode);
 		}
 
+		ecmd->base.port = PORT_FIBRE;
+		ecmd->base.autoneg = AUTONEG_DISABLE;
+		ethtool_link_ksettings_add_link_mode(ecmd, supported, FIBRE);
+
+		ethtool_link_ksettings_add_link_mode(ecmd, supported, Pause);
+		ethtool_link_ksettings_add_link_mode(ecmd, advertising, Pause);
+		if (oct->subsystem_id == OCTEON_CN2350_25GB_SUBSYS_ID ||
+		    oct->subsystem_id == OCTEON_CN2360_25GB_SUBSYS_ID) {
+			if (OCTEON_CN23XX_PF(oct)) {
+				ethtool_link_ksettings_add_link_mode
+					(ecmd, supported, 25000baseSR_Full);
+				ethtool_link_ksettings_add_link_mode
+					(ecmd, supported, 25000baseKR_Full);
+				ethtool_link_ksettings_add_link_mode
+					(ecmd, supported, 25000baseCR_Full);
+
+				if (oct->no_speed_setting == 0)  {
+					ethtool_link_ksettings_add_link_mode
+						(ecmd, supported,
+						 10000baseSR_Full);
+					ethtool_link_ksettings_add_link_mode
+						(ecmd, supported,
+						 10000baseKR_Full);
+					ethtool_link_ksettings_add_link_mode
+						(ecmd, supported,
+						 10000baseCR_Full);
+				}
+
+				if (oct->no_speed_setting == 0)
+					liquidio_get_speed(lio);
+				else
+					oct->speed_setting = 25;
+
+				if (oct->speed_setting == 10) {
+					ethtool_link_ksettings_add_link_mode
+						(ecmd, advertising,
+						 10000baseSR_Full);
+					ethtool_link_ksettings_add_link_mode
+						(ecmd, advertising,
+						 10000baseKR_Full);
+					ethtool_link_ksettings_add_link_mode
+						(ecmd, advertising,
+						 10000baseCR_Full);
+				}
+				if (oct->speed_setting == 25) {
+					ethtool_link_ksettings_add_link_mode
+						(ecmd, advertising,
+						 25000baseSR_Full);
+					ethtool_link_ksettings_add_link_mode
+						(ecmd, advertising,
+						 25000baseKR_Full);
+					ethtool_link_ksettings_add_link_mode
+						(ecmd, advertising,
+						 25000baseCR_Full);
+				}
+			} else { /* VF */
+				if (linfo->link.s.speed == 10000) {
+					ethtool_link_ksettings_add_link_mode
+						(ecmd, supported,
+						 10000baseSR_Full);
+					ethtool_link_ksettings_add_link_mode
+						(ecmd, supported,
+						 10000baseKR_Full);
+					ethtool_link_ksettings_add_link_mode
+						(ecmd, supported,
+						 10000baseCR_Full);
+
+					ethtool_link_ksettings_add_link_mode
+						(ecmd, advertising,
+						 10000baseSR_Full);
+					ethtool_link_ksettings_add_link_mode
+						(ecmd, advertising,
+						 10000baseKR_Full);
+					ethtool_link_ksettings_add_link_mode
+						(ecmd, advertising,
+						 10000baseCR_Full);
+				}
+
+				if (linfo->link.s.speed == 25000) {
+					ethtool_link_ksettings_add_link_mode
+						(ecmd, supported,
+						 25000baseSR_Full);
+					ethtool_link_ksettings_add_link_mode
+						(ecmd, supported,
+						 25000baseKR_Full);
+					ethtool_link_ksettings_add_link_mode
+						(ecmd, supported,
+						 25000baseCR_Full);
+
+					ethtool_link_ksettings_add_link_mode
+						(ecmd, advertising,
+						 25000baseSR_Full);
+					ethtool_link_ksettings_add_link_mode
+						(ecmd, advertising,
+						 25000baseKR_Full);
+					ethtool_link_ksettings_add_link_mode
+						(ecmd, advertising,
+						 25000baseCR_Full);
+				}
+			}
+		} else {
+			ethtool_link_ksettings_add_link_mode(ecmd, supported,
+							     10000baseT_Full);
+			ethtool_link_ksettings_add_link_mode(ecmd, advertising,
+							     10000baseT_Full);
+		}
+		break;
+	}
+
 	if (linfo->link.s.link_up) {
 		ecmd->base.speed = linfo->link.s.speed;
 		ecmd->base.duplex = linfo->link.s.duplex;
@@ -281,6 +382,51 @@ static int lio_get_link_ksettings(struct net_device *netdev,
 	return 0;
 }
 
+static int lio_set_link_ksettings(struct net_device *netdev,
+				  const struct ethtool_link_ksettings *ecmd)
+{
+	const int speed = ecmd->base.speed;
+	struct lio *lio = GET_LIO(netdev);
+	struct oct_link_info *linfo;
+	struct octeon_device *oct;
+	u32 is25G = 0;
+
+	oct = lio->oct_dev;
+
+	linfo = &lio->linfo;
+
+	if (oct->subsystem_id == OCTEON_CN2350_25GB_SUBSYS_ID ||
+	    oct->subsystem_id == OCTEON_CN2360_25GB_SUBSYS_ID) {
+		is25G = 1;
+	} else {
+		return -EOPNOTSUPP;
+	}
+
+	if (oct->no_speed_setting) {
+		dev_err(&oct->pci_dev->dev, "%s: Changing speed is not supported\n",
+			__func__);
+		return -EOPNOTSUPP;
+	}
+
+	if ((ecmd->base.duplex != DUPLEX_UNKNOWN &&
+	     ecmd->base.duplex != linfo->link.s.duplex) ||
+	     ecmd->base.autoneg != AUTONEG_DISABLE ||
+	    (ecmd->base.speed != 10000 && ecmd->base.speed != 25000 &&
+	     ecmd->base.speed != SPEED_UNKNOWN))
+		return -EOPNOTSUPP;
+
+	if ((oct->speed_boot == speed / 1000) &&
+	    oct->speed_boot == oct->speed_setting)
+		return 0;
+
+	liquidio_set_speed(lio, speed / 1000);
+
+	dev_dbg(&oct->pci_dev->dev, "Port speed is set to %dG\n",
+		oct->speed_setting);
+
+	return 0;
+}
+
 static void
 lio_get_drvinfo(struct net_device *netdev, struct ethtool_drvinfo *drvinfo)
 {
@@ -2966,6 +3112,7 @@ static int lio_set_priv_flags(struct net_device *netdev, u32 flags)
 
 static const struct ethtool_ops lio_ethtool_ops = {
 	.get_link_ksettings	= lio_get_link_ksettings,
+	.set_link_ksettings	= lio_set_link_ksettings,
 	.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

@@ -912,6 +912,9 @@ liquidio_probe(struct pci_dev *pdev,
 	/* set linux specific device pointer */
 	oct_dev->pci_dev = (void *)pdev;
 
+	oct_dev->subsystem_id = pdev->subsystem_vendor |
+		(pdev->subsystem_device << 16);
+
 	hs = &handshake[oct_dev->octeon_id];
 	init_completion(&hs->init);
 	init_completion(&hs->started);
@@ -3664,6 +3667,23 @@ static int setup_nic_devices(struct octeon_device *octeon_dev)
 			"NIC ifidx:%d Setup successful\n", i);
 
 		octeon_free_soft_command(octeon_dev, sc);
+
+		if (octeon_dev->subsystem_id ==
+			OCTEON_CN2350_25GB_SUBSYS_ID ||
+		    octeon_dev->subsystem_id ==
+			OCTEON_CN2360_25GB_SUBSYS_ID) {
+			liquidio_get_speed(lio);
+
+			if (octeon_dev->speed_setting == 0) {
+				octeon_dev->speed_setting = 25;
+				octeon_dev->no_speed_setting = 1;
+			}
+		} else {
+			octeon_dev->no_speed_setting = 1;
+			octeon_dev->speed_setting = 10;
+		}
+		octeon_dev->speed_boot = octeon_dev->speed_setting;
+
 	}
 
 	devlink = devlink_alloc(&liquidio_devlink_ops,

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

@@ -411,6 +411,9 @@ liquidio_vf_probe(struct pci_dev *pdev,
 	/* set linux specific device pointer */
 	oct_dev->pci_dev = pdev;
 
+	oct_dev->subsystem_id = pdev->subsystem_vendor |
+		(pdev->subsystem_device << 16);
+
 	if (octeon_device_init(oct_dev)) {
 		liquidio_vf_remove(pdev);
 		return -ENOMEM;
@@ -2199,6 +2202,8 @@ static int setup_nic_devices(struct octeon_device *octeon_dev)
 			"NIC ifidx:%d Setup successful\n", i);
 
 		octeon_free_soft_command(octeon_dev, sc);
+
+		octeon_dev->no_speed_setting = 1;
 	}
 
 	return 0;

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

@@ -93,6 +93,7 @@ enum octeon_tag_type {
 
 #define OPCODE_NIC_VF_REP_PKT          0x15
 #define OPCODE_NIC_VF_REP_CMD          0x16
+#define OPCODE_NIC_UBOOT_CTL           0x17
 
 #define CORE_DRV_TEST_SCATTER_OP    0xFFF5
 
@@ -249,6 +250,9 @@ static inline void add_sg_size(struct octeon_sg_entry *sg_entry,
 #define   OCTNET_CMD_VLAN_FILTER_ENABLE 0x1
 #define   OCTNET_CMD_VLAN_FILTER_DISABLE 0x0
 
+#define   SEAPI_CMD_SPEED_SET           0x2
+#define   SEAPI_CMD_SPEED_GET           0x3
+
 #define   LIO_CMD_WAIT_TM 100
 
 /* RX(packets coming from wire) Checksum verification flags */

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

@@ -43,6 +43,13 @@
 #define  OCTEON_CN23XX_REV_1_1        0x01
 #define  OCTEON_CN23XX_REV_2_0        0x80
 
+/**SubsystemId for the chips */
+#define	 OCTEON_CN2350_10GB_SUBSYS_ID_1	0X3177d
+#define	 OCTEON_CN2350_10GB_SUBSYS_ID_2	0X4177d
+#define	 OCTEON_CN2360_10GB_SUBSYS_ID	0X5177d
+#define	 OCTEON_CN2350_25GB_SUBSYS_ID	0X7177d
+#define	 OCTEON_CN2360_25GB_SUBSYS_ID	0X6177d
+
 /** Endian-swap modes supported by Octeon. */
 enum octeon_pci_swap_mode {
 	OCTEON_PCI_PASSTHROUGH = 0,
@@ -430,6 +437,8 @@ struct octeon_device {
 
 	u16 rev_id;
 
+	u32 subsystem_id;
+
 	u16 pf_num;
 
 	u16 vf_num;
@@ -584,6 +593,11 @@ struct octeon_device {
 	struct lio_vf_rep_list vf_rep_list;
 	struct devlink *devlink;
 	enum devlink_eswitch_mode eswitch_mode;
+
+	/* for 25G NIC speed change */
+	u8  speed_boot;
+	u8  speed_setting;
+	u8  no_speed_setting;
 };
 
 #define  OCT_DRV_ONLINE 1

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

@@ -81,6 +81,18 @@ struct oct_nic_stats_ctrl {
 	struct net_device *netdev;
 };
 
+struct oct_nic_seapi_resp {
+	u64 rh;
+	u32 speed;
+	u64 status;
+};
+
+struct liquidio_nic_seapi_ctl_context {
+	int octeon_id;
+	u32 status;
+	struct completion complete;
+};
+
 /** LiquidIO per-interface network private data */
 struct lio {
 	/** State of the interface. Rx/Tx happens only in the RUNNING state.  */
@@ -230,6 +242,9 @@ void lio_delete_glists(struct lio *lio);
 
 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);
+
 /**
  * \brief Net device change_mtu
  * @param netdev network device