ibmvnic: Report actual backing device speed and duplex values

The ibmvnic driver currently reports a fixed value for both speed and
duplex settings regardless of the actual backing device that is being
used. By adding support to the QUERY_PHYS_PARMS command defined by the
PAPR+ we can query the current physical port state and report the proper
values for these feilds.

Reported-by: Abdul Haleem <abdhalee@linux.vnet.ibm.com>
Signed-off-by: Murilo Fossa Vicentini <muvic@linux.ibm.com>
Reviewed-by: Mauro S. M. Rodrigues <maurosr@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Author: Murilo Fossa Vicentini

drivers/net/ethernet/ibm/ibmvnic.c

@@ -120,6 +120,7 @@ static int ibmvnic_reset_init(struct ibmvnic_adapter *);
 static void release_crq_queue(struct ibmvnic_adapter *);
 static int __ibmvnic_set_mac(struct net_device *netdev, struct sockaddr *p);
 static int init_crq_queue(struct ibmvnic_adapter *adapter);
+static int send_query_phys_parms(struct ibmvnic_adapter *adapter);
 
 struct ibmvnic_stat {
 	char name[ETH_GSTRING_LEN];
@@ -2278,23 +2279,20 @@ static const struct net_device_ops ibmvnic_netdev_ops = {
 static int ibmvnic_get_link_ksettings(struct net_device *netdev,
 				      struct ethtool_link_ksettings *cmd)
 {
-	u32 supported, advertising;
+	struct ibmvnic_adapter *adapter = netdev_priv(netdev);
+	int rc;
 
-	supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg |
-			  SUPPORTED_FIBRE);
-	advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg |
-			    ADVERTISED_FIBRE);
-	cmd->base.speed = SPEED_1000;
-	cmd->base.duplex = DUPLEX_FULL;
+	rc = send_query_phys_parms(adapter);
+	if (rc) {
+		adapter->speed = SPEED_UNKNOWN;
+		adapter->duplex = DUPLEX_UNKNOWN;
+	}
+	cmd->base.speed = adapter->speed;
+	cmd->base.duplex = adapter->duplex;
 	cmd->base.port = PORT_FIBRE;
 	cmd->base.phy_address = 0;
 	cmd->base.autoneg = AUTONEG_ENABLE;
 
-	ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported,
-						supported);
-	ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising,
-						advertising);
-
 	return 0;
 }
 
@@ -4278,6 +4276,73 @@ static void handle_query_cap_rsp(union ibmvnic_crq *crq,
 	}
 }
 
+static int send_query_phys_parms(struct ibmvnic_adapter *adapter)
+{
+	union ibmvnic_crq crq;
+	int rc;
+
+	memset(&crq, 0, sizeof(crq));
+	crq.query_phys_parms.first = IBMVNIC_CRQ_CMD;
+	crq.query_phys_parms.cmd = QUERY_PHYS_PARMS;
+	init_completion(&adapter->fw_done);
+	rc = ibmvnic_send_crq(adapter, &crq);
+	if (rc)
+		return rc;
+	wait_for_completion(&adapter->fw_done);
+	return adapter->fw_done_rc ? -EIO : 0;
+}
+
+static int handle_query_phys_parms_rsp(union ibmvnic_crq *crq,
+				       struct ibmvnic_adapter *adapter)
+{
+	struct net_device *netdev = adapter->netdev;
+	int rc;
+
+	rc = crq->query_phys_parms_rsp.rc.code;
+	if (rc) {
+		netdev_err(netdev, "Error %d in QUERY_PHYS_PARMS\n", rc);
+		return rc;
+	}
+	switch (cpu_to_be32(crq->query_phys_parms_rsp.speed)) {
+	case IBMVNIC_10MBPS:
+		adapter->speed = SPEED_10;
+		break;
+	case IBMVNIC_100MBPS:
+		adapter->speed = SPEED_100;
+		break;
+	case IBMVNIC_1GBPS:
+		adapter->speed = SPEED_1000;
+		break;
+	case IBMVNIC_10GBP:
+		adapter->speed = SPEED_10000;
+		break;
+	case IBMVNIC_25GBPS:
+		adapter->speed = SPEED_25000;
+		break;
+	case IBMVNIC_40GBPS:
+		adapter->speed = SPEED_40000;
+		break;
+	case IBMVNIC_50GBPS:
+		adapter->speed = SPEED_50000;
+		break;
+	case IBMVNIC_100GBPS:
+		adapter->speed = SPEED_100000;
+		break;
+	default:
+		netdev_warn(netdev, "Unknown speed 0x%08x\n",
+			    cpu_to_be32(crq->query_phys_parms_rsp.speed));
+		adapter->speed = SPEED_UNKNOWN;
+	}
+	if (crq->query_phys_parms_rsp.flags1 & IBMVNIC_FULL_DUPLEX)
+		adapter->duplex = DUPLEX_FULL;
+	else if (crq->query_phys_parms_rsp.flags1 & IBMVNIC_HALF_DUPLEX)
+		adapter->duplex = DUPLEX_HALF;
+	else
+		adapter->duplex = DUPLEX_UNKNOWN;
+
+	return rc;
+}
+
 static void ibmvnic_handle_crq(union ibmvnic_crq *crq,
 			       struct ibmvnic_adapter *adapter)
 {
@@ -4426,6 +4491,10 @@ static void ibmvnic_handle_crq(union ibmvnic_crq *crq,
 	case GET_VPD_RSP:
 		handle_vpd_rsp(crq, adapter);
 		break;
+	case QUERY_PHYS_PARMS_RSP:
+		adapter->fw_done_rc = handle_query_phys_parms_rsp(crq, adapter);
+		complete(&adapter->fw_done);
+		break;
 	default:
 		netdev_err(netdev, "Got an invalid cmd type 0x%02x\n",
 			   gen_crq->cmd);

drivers/net/ethernet/ibm/ibmvnic.h

@@ -377,11 +377,16 @@ struct ibmvnic_phys_parms {
 	u8 flags2;
 #define IBMVNIC_LOGICAL_LNK_ACTIVE 0x80
 	__be32 speed;
-#define IBMVNIC_AUTONEG		0x80
-#define IBMVNIC_10MBPS		0x40
-#define IBMVNIC_100MBPS		0x20
-#define IBMVNIC_1GBPS		0x10
-#define IBMVNIC_10GBPS		0x08
+#define IBMVNIC_AUTONEG		0x80000000
+#define IBMVNIC_10MBPS		0x40000000
+#define IBMVNIC_100MBPS		0x20000000
+#define IBMVNIC_1GBPS		0x10000000
+#define IBMVNIC_10GBP		0x08000000
+#define IBMVNIC_40GBPS		0x04000000
+#define IBMVNIC_100GBPS		0x02000000
+#define IBMVNIC_25GBPS		0x01000000
+#define IBMVNIC_50GBPS		0x00800000
+#define IBMVNIC_200GBPS		0x00400000
 	__be32 mtu;
 	struct ibmvnic_rc rc;
 } __packed __aligned(8);
@@ -999,6 +1004,9 @@ struct ibmvnic_adapter {
 	int phys_link_state;
 	int logical_link_state;
 
+	u32 speed;
+	u8 duplex;
+
 	/* login data */
 	struct ibmvnic_login_buffer *login_buf;
 	dma_addr_t login_buf_token;