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KSZ9477, KSZ9567, KSZ9563, KSZ8563 and LAN937x supports Credit based shaper. To differentiate the chip supporting cbs, tc_cbs_supported flag is introduced in ksz_chip_data. And KSZ series has 16bit Credit increment registers whereas LAN937x has 24bit register. The value to be programmed in the credit increment is determined using the successive multiplication method to convert decimal fraction to hexadecimal fraction. For example: if idleslope is 10000 and sendslope is -90000, then bandwidth is 10000 - (-90000) = 100000. The 10% bandwidth of 100Mbps means 10/100 = 0.1(decimal). This value has to be converted to hexa. 1) 0.1 * 16 = 1.6 --> fraction 0.6 Carry = 1 (MSB) 2) 0.6 * 16 = 9.6 --> fraction 0.6 Carry = 9 3) 0.6 * 16 = 9.6 --> fraction 0.6 Carry = 9 4) 0.6 * 16 = 9.6 --> fraction 0.6 Carry = 9 5) 0.6 * 16 = 9.6 --> fraction 0.6 Carry = 9 6) 0.6 * 16 = 9.6 --> fraction 0.6 Carry = 9 (LSB) Now 0.1(decimal) becomes 0.199999(Hex). If it is LAN937x, 24 bit value will be programmed to Credit Inc register, 0x199999. For others 16 bit value will be prgrammed, 0x1999. Signed-off-by: Arun Ramadoss <arun.ramadoss@microchip.com> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
62 lines
2.9 KiB
C
62 lines
2.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Microchip KSZ9477 series Header file
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*
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* Copyright (C) 2017-2022 Microchip Technology Inc.
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*/
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#ifndef __KSZ9477_H
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#define __KSZ9477_H
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#include <net/dsa.h>
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#include "ksz_common.h"
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int ksz9477_setup(struct dsa_switch *ds);
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u32 ksz9477_get_port_addr(int port, int offset);
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void ksz9477_cfg_port_member(struct ksz_device *dev, int port, u8 member);
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void ksz9477_flush_dyn_mac_table(struct ksz_device *dev, int port);
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void ksz9477_port_setup(struct ksz_device *dev, int port, bool cpu_port);
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int ksz9477_set_ageing_time(struct ksz_device *dev, unsigned int msecs);
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int ksz9477_r_phy(struct ksz_device *dev, u16 addr, u16 reg, u16 *data);
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int ksz9477_w_phy(struct ksz_device *dev, u16 addr, u16 reg, u16 val);
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void ksz9477_r_mib_cnt(struct ksz_device *dev, int port, u16 addr, u64 *cnt);
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void ksz9477_r_mib_pkt(struct ksz_device *dev, int port, u16 addr,
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u64 *dropped, u64 *cnt);
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void ksz9477_freeze_mib(struct ksz_device *dev, int port, bool freeze);
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void ksz9477_port_init_cnt(struct ksz_device *dev, int port);
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int ksz9477_port_vlan_filtering(struct ksz_device *dev, int port,
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bool flag, struct netlink_ext_ack *extack);
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int ksz9477_port_vlan_add(struct ksz_device *dev, int port,
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const struct switchdev_obj_port_vlan *vlan,
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struct netlink_ext_ack *extack);
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int ksz9477_port_vlan_del(struct ksz_device *dev, int port,
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const struct switchdev_obj_port_vlan *vlan);
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int ksz9477_port_mirror_add(struct ksz_device *dev, int port,
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struct dsa_mall_mirror_tc_entry *mirror,
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bool ingress, struct netlink_ext_ack *extack);
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void ksz9477_port_mirror_del(struct ksz_device *dev, int port,
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struct dsa_mall_mirror_tc_entry *mirror);
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int ksz9477_get_stp_reg(void);
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void ksz9477_get_caps(struct ksz_device *dev, int port,
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struct phylink_config *config);
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int ksz9477_fdb_dump(struct ksz_device *dev, int port,
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dsa_fdb_dump_cb_t *cb, void *data);
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int ksz9477_fdb_add(struct ksz_device *dev, int port,
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const unsigned char *addr, u16 vid, struct dsa_db db);
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int ksz9477_fdb_del(struct ksz_device *dev, int port,
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const unsigned char *addr, u16 vid, struct dsa_db db);
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int ksz9477_mdb_add(struct ksz_device *dev, int port,
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const struct switchdev_obj_port_mdb *mdb, struct dsa_db db);
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int ksz9477_mdb_del(struct ksz_device *dev, int port,
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const struct switchdev_obj_port_mdb *mdb, struct dsa_db db);
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int ksz9477_change_mtu(struct ksz_device *dev, int port, int mtu);
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void ksz9477_config_cpu_port(struct dsa_switch *ds);
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int ksz9477_tc_cbs_set_cinc(struct ksz_device *dev, int port, u32 val);
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int ksz9477_enable_stp_addr(struct ksz_device *dev);
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int ksz9477_reset_switch(struct ksz_device *dev);
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int ksz9477_dsa_init(struct ksz_device *dev);
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int ksz9477_switch_init(struct ksz_device *dev);
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void ksz9477_switch_exit(struct ksz_device *dev);
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void ksz9477_port_queue_split(struct ksz_device *dev, int port);
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#endif
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