hinic: add support to get eeprom information

add support to get eeprom information from the plug-in module
with ethtool -m cmd.
Signed-off-by: Luo bin <luobin9@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/huawei/hinic/hinic_ethtool.c

@@ -25,6 +25,7 @@
 #include <linux/if_vlan.h>
 #include <linux/ethtool.h>
 #include <linux/vmalloc.h>
+#include <linux/sfp.h>
 
 #include "hinic_hw_qp.h"
 #include "hinic_hw_dev.h"
@@ -1717,6 +1718,72 @@ static int hinic_set_phys_id(struct net_device *netdev,
 	return err;
 }
 
+static int hinic_get_module_info(struct net_device *netdev,
+				 struct ethtool_modinfo *modinfo)
+{
+	struct hinic_dev *nic_dev = netdev_priv(netdev);
+	u8 sfp_type_ext;
+	u8 sfp_type;
+	int err;
+
+	err = hinic_get_sfp_type(nic_dev->hwdev, &sfp_type, &sfp_type_ext);
+	if (err)
+		return err;
+
+	switch (sfp_type) {
+	case SFF8024_ID_SFP:
+		modinfo->type = ETH_MODULE_SFF_8472;
+		modinfo->eeprom_len = ETH_MODULE_SFF_8472_LEN;
+		break;
+	case SFF8024_ID_QSFP_8438:
+		modinfo->type = ETH_MODULE_SFF_8436;
+		modinfo->eeprom_len = ETH_MODULE_SFF_8436_MAX_LEN;
+		break;
+	case SFF8024_ID_QSFP_8436_8636:
+		if (sfp_type_ext >= 0x3) {
+			modinfo->type = ETH_MODULE_SFF_8636;
+			modinfo->eeprom_len = ETH_MODULE_SFF_8636_MAX_LEN;
+
+		} else {
+			modinfo->type = ETH_MODULE_SFF_8436;
+			modinfo->eeprom_len = ETH_MODULE_SFF_8436_MAX_LEN;
+		}
+		break;
+	case SFF8024_ID_QSFP28_8636:
+		modinfo->type = ETH_MODULE_SFF_8636;
+		modinfo->eeprom_len = ETH_MODULE_SFF_8636_MAX_LEN;
+		break;
+	default:
+		netif_warn(nic_dev, drv, netdev,
+			   "Optical module unknown: 0x%x\n", sfp_type);
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int hinic_get_module_eeprom(struct net_device *netdev,
+				   struct ethtool_eeprom *ee, u8 *data)
+{
+	struct hinic_dev *nic_dev = netdev_priv(netdev);
+	u8 sfp_data[STD_SFP_INFO_MAX_SIZE];
+	u16 len;
+	int err;
+
+	if (!ee->len || ((ee->len + ee->offset) > STD_SFP_INFO_MAX_SIZE))
+		return -EINVAL;
+
+	memset(data, 0, ee->len);
+
+	err = hinic_get_sfp_eeprom(nic_dev->hwdev, sfp_data, &len);
+	if (err)
+		return err;
+
+	memcpy(data, sfp_data + ee->offset, ee->len);
+
+	return 0;
+}
+
 static const struct ethtool_ops hinic_ethtool_ops = {
 	.supported_coalesce_params = ETHTOOL_COALESCE_RX_USECS |
 				     ETHTOOL_COALESCE_RX_MAX_FRAMES |
@@ -1748,6 +1815,8 @@ static const struct ethtool_ops hinic_ethtool_ops = {
 	.get_strings = hinic_get_strings,
 	.self_test = hinic_diag_test,
 	.set_phys_id = hinic_set_phys_id,
+	.get_module_info = hinic_get_module_info,
+	.get_module_eeprom = hinic_get_module_eeprom,
 };
 
 static const struct ethtool_ops hinicvf_ethtool_ops = {

drivers/net/ethernet/huawei/hinic/hinic_hw_dev.h

@@ -130,9 +130,13 @@ enum hinic_port_cmd {
 
 	HINIC_PORT_CMD_SET_AUTONEG	= 219,
 
+	HINIC_PORT_CMD_GET_STD_SFP_INFO = 240,
+
 	HINIC_PORT_CMD_SET_LRO_TIMER	= 244,
 
 	HINIC_PORT_CMD_SET_VF_MAX_MIN_RATE = 249,
+
+	HINIC_PORT_CMD_GET_SFP_ABS	= 251,
 };
 
 /* cmd of mgmt CPU message for HILINK module */

drivers/net/ethernet/huawei/hinic/hinic_port.c

@@ -1323,3 +1323,75 @@ int hinic_reset_led_status(struct hinic_hwdev *hwdev, u8 port)
 
 	return err;
 }
+
+static bool hinic_if_sfp_absent(struct hinic_hwdev *hwdev)
+{
+	struct hinic_cmd_get_light_module_abs sfp_abs = {0};
+	u16 out_size = sizeof(sfp_abs);
+	u8 port_id = hwdev->port_id;
+	int err;
+
+	sfp_abs.port_id = port_id;
+	err = hinic_port_msg_cmd(hwdev, HINIC_PORT_CMD_GET_SFP_ABS,
+				 &sfp_abs, sizeof(sfp_abs), &sfp_abs,
+				 &out_size);
+	if (sfp_abs.status || err || !out_size) {
+		dev_err(&hwdev->hwif->pdev->dev,
+			"Failed to get port%d sfp absent status, err: %d, status: 0x%x, out size: 0x%x\n",
+			port_id, err, sfp_abs.status, out_size);
+		return true;
+	}
+
+	return ((sfp_abs.abs_status == 0) ? false : true);
+}
+
+int hinic_get_sfp_eeprom(struct hinic_hwdev *hwdev, u8 *data, u16 *len)
+{
+	struct hinic_cmd_get_std_sfp_info sfp_info = {0};
+	u16 out_size = sizeof(sfp_info);
+	u8 port_id;
+	int err;
+
+	if (!hwdev || !data || !len)
+		return -EINVAL;
+
+	port_id = hwdev->port_id;
+
+	if (hinic_if_sfp_absent(hwdev))
+		return -ENXIO;
+
+	sfp_info.port_id = port_id;
+	err = hinic_port_msg_cmd(hwdev, HINIC_PORT_CMD_GET_STD_SFP_INFO,
+				 &sfp_info, sizeof(sfp_info), &sfp_info,
+				 &out_size);
+	if (sfp_info.status || err || !out_size) {
+		dev_err(&hwdev->hwif->pdev->dev,
+			"Failed to get port%d sfp eeprom information, err: %d, status: 0x%x, out size: 0x%x\n",
+			port_id, err, sfp_info.status, out_size);
+		return -EIO;
+	}
+
+	*len = min_t(u16, sfp_info.eeprom_len, STD_SFP_INFO_MAX_SIZE);
+	memcpy(data, sfp_info.sfp_info, STD_SFP_INFO_MAX_SIZE);
+
+	return 0;
+}
+
+int hinic_get_sfp_type(struct hinic_hwdev *hwdev, u8 *data0, u8 *data1)
+{
+	u8 sfp_data[STD_SFP_INFO_MAX_SIZE];
+	u16 len;
+	int err;
+
+	if (hinic_if_sfp_absent(hwdev))
+		return -ENXIO;
+
+	err = hinic_get_sfp_eeprom(hwdev, sfp_data, &len);
+	if (err)
+		return err;
+
+	*data0 = sfp_data[0];
+	*data1 = sfp_data[1];
+
+	return 0;
+}

drivers/net/ethernet/huawei/hinic/hinic_port.h

@@ -677,6 +677,32 @@ struct hinic_led_info {
 	u8	reset;
 };
 
+#define STD_SFP_INFO_MAX_SIZE	640
+
+struct hinic_cmd_get_light_module_abs {
+	u8 status;
+	u8 version;
+	u8 rsvd0[6];
+
+	u8 port_id;
+	u8 abs_status; /* 0:present, 1:absent */
+	u8 rsv[2];
+};
+
+#define STD_SFP_INFO_MAX_SIZE	640
+
+struct hinic_cmd_get_std_sfp_info {
+	u8 status;
+	u8 version;
+	u8 rsvd0[6];
+
+	u8 port_id;
+	u8 wire_type;
+	u16 eeprom_len;
+	u32 rsvd;
+	u8 sfp_info[STD_SFP_INFO_MAX_SIZE];
+};
+
 int hinic_port_add_mac(struct hinic_dev *nic_dev, const u8 *addr,
 		       u16 vlan_id);
 
@@ -800,6 +826,10 @@ int hinic_reset_led_status(struct hinic_hwdev *hwdev, u8 port);
 int hinic_set_led_status(struct hinic_hwdev *hwdev, u8 port,
 			 enum hinic_led_type type, enum hinic_led_mode mode);
 
+int hinic_get_sfp_type(struct hinic_hwdev *hwdev, u8 *data0, u8 *data1);
+
+int hinic_get_sfp_eeprom(struct hinic_hwdev *hwdev, u8 *data, u16 *len);
+
 int hinic_open(struct net_device *netdev);
 
 int hinic_close(struct net_device *netdev);