From: Vadim Pasternak <vadimp@mellanox.com>
Date: Sun, 3 Mar 2019 09:12:08 +0000
Subject: mlxsw: core: Move ethtool module callbacks to a common location
Patch-mainline: v5.1-rc1
Git-commit: 1b1c6c1a3802bf9e7a698d359771e29897c369e5
References: bsc#1112374

Move the implementation of ethtool module callbacks - .get_module_info()
and .get_module_eeprom() - to a common location to allow reuse by the
different mlxsw drivers.

Signed-off-by: Vadim Pasternak <vadimp@mellanox.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/net/ethernet/mellanox/mlxsw/core_env.c |  121 +++++++++++++++++++++++++
 drivers/net/ethernet/mellanox/mlxsw/core_env.h |    7 +
 drivers/net/ethernet/mellanox/mlxsw/spectrum.c |  118 ++----------------------
 3 files changed, 139 insertions(+), 107 deletions(-)

--- a/drivers/net/ethernet/mellanox/mlxsw/core_env.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/core_env.c
@@ -41,6 +41,47 @@ static int mlxsw_env_validate_cable_iden
 	return 0;
 }
 
+static int
+mlxsw_env_query_module_eeprom(struct mlxsw_core *mlxsw_core, int module,
+			      u16 offset, u16 size, void *data,
+			      unsigned int *p_read_size)
+{
+	char eeprom_tmp[MLXSW_REG_MCIA_EEPROM_SIZE];
+	char mcia_pl[MLXSW_REG_MCIA_LEN];
+	u16 i2c_addr;
+	int status;
+	int err;
+
+	size = min_t(u16, size, MLXSW_REG_MCIA_EEPROM_SIZE);
+
+	if (offset < MLXSW_REG_MCIA_EEPROM_PAGE_LENGTH &&
+	    offset + size > MLXSW_REG_MCIA_EEPROM_PAGE_LENGTH)
+		/* Cross pages read, read until offset 256 in low page */
+		size = MLXSW_REG_MCIA_EEPROM_PAGE_LENGTH - offset;
+
+	i2c_addr = MLXSW_REG_MCIA_I2C_ADDR_LOW;
+	if (offset >= MLXSW_REG_MCIA_EEPROM_PAGE_LENGTH) {
+		i2c_addr = MLXSW_REG_MCIA_I2C_ADDR_HIGH;
+		offset -= MLXSW_REG_MCIA_EEPROM_PAGE_LENGTH;
+	}
+
+	mlxsw_reg_mcia_pack(mcia_pl, module, 0, 0, offset, size, i2c_addr);
+
+	err = mlxsw_reg_query(mlxsw_core, MLXSW_REG(mcia), mcia_pl);
+	if (err)
+		return err;
+
+	status = mlxsw_reg_mcia_status_get(mcia_pl);
+	if (status)
+		return -EIO;
+
+	mlxsw_reg_mcia_eeprom_memcpy_from(mcia_pl, eeprom_tmp);
+	memcpy(data, eeprom_tmp, size);
+	*p_read_size = size;
+
+	return 0;
+}
+
 int mlxsw_env_module_temp_thresholds_get(struct mlxsw_core *core, int module,
 					 int off, int *temp)
 {
@@ -115,3 +156,83 @@ int mlxsw_env_module_temp_thresholds_get
 
 	return 0;
 }
+
+int mlxsw_env_get_module_info(struct mlxsw_core *mlxsw_core, int module,
+			      struct ethtool_modinfo *modinfo)
+{
+	u8 module_info[MLXSW_REG_MCIA_EEPROM_MODULE_INFO_SIZE];
+	u16 offset = MLXSW_REG_MCIA_EEPROM_MODULE_INFO_SIZE;
+	u8 module_rev_id, module_id;
+	unsigned int read_size;
+	int err;
+
+	err = mlxsw_env_query_module_eeprom(mlxsw_core, module, 0, offset,
+					    module_info, &read_size);
+	if (err)
+		return err;
+
+	if (read_size < offset)
+		return -EIO;
+
+	module_rev_id = module_info[MLXSW_REG_MCIA_EEPROM_MODULE_INFO_REV_ID];
+	module_id = module_info[MLXSW_REG_MCIA_EEPROM_MODULE_INFO_ID];
+
+	switch (module_id) {
+	case MLXSW_REG_MCIA_EEPROM_MODULE_INFO_ID_QSFP:
+		modinfo->type       = ETH_MODULE_SFF_8436;
+		modinfo->eeprom_len = ETH_MODULE_SFF_8436_LEN;
+		break;
+	case MLXSW_REG_MCIA_EEPROM_MODULE_INFO_ID_QSFP_PLUS: /* fall-through */
+	case MLXSW_REG_MCIA_EEPROM_MODULE_INFO_ID_QSFP28:
+		if (module_id == MLXSW_REG_MCIA_EEPROM_MODULE_INFO_ID_QSFP28 ||
+		    module_rev_id >=
+		    MLXSW_REG_MCIA_EEPROM_MODULE_INFO_REV_ID_8636) {
+			modinfo->type       = ETH_MODULE_SFF_8636;
+			modinfo->eeprom_len = ETH_MODULE_SFF_8636_LEN;
+		} else {
+			modinfo->type       = ETH_MODULE_SFF_8436;
+			modinfo->eeprom_len = ETH_MODULE_SFF_8436_LEN;
+		}
+		break;
+	case MLXSW_REG_MCIA_EEPROM_MODULE_INFO_ID_SFP:
+		modinfo->type       = ETH_MODULE_SFF_8472;
+		modinfo->eeprom_len = ETH_MODULE_SFF_8472_LEN;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL(mlxsw_env_get_module_info);
+
+int mlxsw_env_get_module_eeprom(struct net_device *netdev,
+				struct mlxsw_core *mlxsw_core, int module,
+				struct ethtool_eeprom *ee, u8 *data)
+{
+	int offset = ee->offset;
+	unsigned int read_size;
+	int i = 0;
+	int err;
+
+	if (!ee->len)
+		return -EINVAL;
+
+	memset(data, 0, ee->len);
+
+	while (i < ee->len) {
+		err = mlxsw_env_query_module_eeprom(mlxsw_core, module, offset,
+						    ee->len - i, data + i,
+						    &read_size);
+		if (err) {
+			netdev_err(netdev, "Eeprom query failed\n");
+			return err;
+		}
+
+		i += read_size;
+		offset += read_size;
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL(mlxsw_env_get_module_eeprom);
--- a/drivers/net/ethernet/mellanox/mlxsw/core_env.h
+++ b/drivers/net/ethernet/mellanox/mlxsw/core_env.h
@@ -7,4 +7,11 @@
 int mlxsw_env_module_temp_thresholds_get(struct mlxsw_core *core, int module,
 					 int off, int *temp);
 
+int mlxsw_env_get_module_info(struct mlxsw_core *mlxsw_core, int module,
+			      struct ethtool_modinfo *modinfo);
+
+int mlxsw_env_get_module_eeprom(struct net_device *netdev,
+				struct mlxsw_core *mlxsw_core, int module,
+				struct ethtool_eeprom *ee, u8 *data);
+
 #endif
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum.c
@@ -32,6 +32,7 @@
 #include "spectrum.h"
 #include "pci.h"
 #include "core.h"
+#include "core_env.h"
 #include "reg.h"
 #include "port.h"
 #include "trap.h"
@@ -2543,99 +2544,18 @@ out:
 	return err;
 }
 
-#define MLXSW_SP_I2C_ADDR_LOW 0x50
-#define MLXSW_SP_I2C_ADDR_HIGH 0x51
-#define MLXSW_SP_EEPROM_PAGE_LENGTH 256
-
-static int mlxsw_sp_query_module_eeprom(struct mlxsw_sp_port *mlxsw_sp_port,
-					u16 offset, u16 size, void *data,
-					unsigned int *p_read_size)
-{
-	struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
-	char eeprom_tmp[MLXSW_REG_MCIA_EEPROM_SIZE];
-	char mcia_pl[MLXSW_REG_MCIA_LEN];
-	u16 i2c_addr;
-	int status;
-	int err;
-
-	size = min_t(u16, size, MLXSW_REG_MCIA_EEPROM_SIZE);
-
-	if (offset < MLXSW_REG_MCIA_EEPROM_PAGE_LENGTH &&
-	    offset + size > MLXSW_REG_MCIA_EEPROM_PAGE_LENGTH)
-		/* Cross pages read, read until offset 256 in low page */
-		size = MLXSW_REG_MCIA_EEPROM_PAGE_LENGTH - offset;
-
-	i2c_addr = MLXSW_REG_MCIA_I2C_ADDR_LOW;
-	if (offset >= MLXSW_REG_MCIA_EEPROM_PAGE_LENGTH) {
-		i2c_addr = MLXSW_REG_MCIA_I2C_ADDR_HIGH;
-		offset -= MLXSW_REG_MCIA_EEPROM_PAGE_LENGTH;
-	}
-
-	mlxsw_reg_mcia_pack(mcia_pl, mlxsw_sp_port->mapping.module,
-			    0, 0, offset, size, i2c_addr);
-
-	err = mlxsw_reg_query(mlxsw_sp->core, MLXSW_REG(mcia), mcia_pl);
-	if (err)
-		return err;
-
-	status = mlxsw_reg_mcia_status_get(mcia_pl);
-	if (status)
-		return -EIO;
-
-	mlxsw_reg_mcia_eeprom_memcpy_from(mcia_pl, eeprom_tmp);
-	memcpy(data, eeprom_tmp, size);
-	*p_read_size = size;
-
-	return 0;
-}
-
 static int mlxsw_sp_get_module_info(struct net_device *netdev,
 				    struct ethtool_modinfo *modinfo)
 {
 	struct mlxsw_sp_port *mlxsw_sp_port = netdev_priv(netdev);
-	u8 module_info[MLXSW_REG_MCIA_EEPROM_MODULE_INFO_SIZE];
-	u16 offset = MLXSW_REG_MCIA_EEPROM_MODULE_INFO_SIZE;
-	u8 module_rev_id, module_id;
-	unsigned int read_size;
+	struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
 	int err;
 
-	err = mlxsw_sp_query_module_eeprom(mlxsw_sp_port, 0, offset,
-					   module_info, &read_size);
-	if (err)
-		return err;
-
-	if (read_size < offset)
-		return -EIO;
-
-	module_rev_id = module_info[MLXSW_REG_MCIA_EEPROM_MODULE_INFO_REV_ID];
-	module_id = module_info[MLXSW_REG_MCIA_EEPROM_MODULE_INFO_ID];
+	err = mlxsw_env_get_module_info(mlxsw_sp->core,
+					mlxsw_sp_port->mapping.module,
+					modinfo);
 
-	switch (module_id) {
-	case MLXSW_REG_MCIA_EEPROM_MODULE_INFO_ID_QSFP:
-		modinfo->type       = ETH_MODULE_SFF_8436;
-		modinfo->eeprom_len = ETH_MODULE_SFF_8436_LEN;
-		break;
-	case MLXSW_REG_MCIA_EEPROM_MODULE_INFO_ID_QSFP_PLUS: /* fall-through */
-	case MLXSW_REG_MCIA_EEPROM_MODULE_INFO_ID_QSFP28:
-		if (module_id == MLXSW_REG_MCIA_EEPROM_MODULE_INFO_ID_QSFP28 ||
-		    module_rev_id >=
-		    MLXSW_REG_MCIA_EEPROM_MODULE_INFO_REV_ID_8636) {
-			modinfo->type       = ETH_MODULE_SFF_8636;
-			modinfo->eeprom_len = ETH_MODULE_SFF_8636_LEN;
-		} else {
-			modinfo->type       = ETH_MODULE_SFF_8436;
-			modinfo->eeprom_len = ETH_MODULE_SFF_8436_LEN;
-		}
-		break;
-	case MLXSW_REG_MCIA_EEPROM_MODULE_INFO_ID_SFP:
-		modinfo->type       = ETH_MODULE_SFF_8472;
-		modinfo->eeprom_len = ETH_MODULE_SFF_8472_LEN;
-		break;
-	default:
-		return -EINVAL;
-	}
-
-	return 0;
+	return err;
 }
 
 static int mlxsw_sp_get_module_eeprom(struct net_device *netdev,
@@ -2643,30 +2563,14 @@ static int mlxsw_sp_get_module_eeprom(st
 				      u8 *data)
 {
 	struct mlxsw_sp_port *mlxsw_sp_port = netdev_priv(netdev);
-	int offset = ee->offset;
-	unsigned int read_size;
-	int i = 0;
+	struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
 	int err;
 
-	if (!ee->len)
-		return -EINVAL;
-
-	memset(data, 0, ee->len);
-
-	while (i < ee->len) {
-		err = mlxsw_sp_query_module_eeprom(mlxsw_sp_port, offset,
-						   ee->len - i, data + i,
-						   &read_size);
-		if (err) {
-			netdev_err(mlxsw_sp_port->dev, "Eeprom query failed\n");
-			return err;
-		}
-
-		i += read_size;
-		offset += read_size;
-	}
+	err = mlxsw_env_get_module_eeprom(netdev, mlxsw_sp->core,
+					  mlxsw_sp_port->mapping.module, ee,
+					  data);
 
-	return 0;
+	return err;
 }
 
 static const struct ethtool_ops mlxsw_sp_port_ethtool_ops = {