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The KSZ9477 switch driver uses the XPCS driver to operate its SGMII port. However there are some hardware bugs in the KSZ9477 SGMII module so workarounds are needed. There was a proposal to update the XPCS driver to accommodate KSZ9477, but the new code is not generic enough to be used by other vendors. It is better to do all these workarounds inside the KSZ9477 driver instead of modifying the XPCS driver. There are 3 hardware issues. The first is the MII_ADVERTISE register needs to be write once after reset for the correct code word to be sent. The XPCS driver disables auto-negotiation first before configuring the SGMII/1000BASE-X mode and then enables it back. The KSZ9477 driver then writes the MII_ADVERTISE register before enabling auto-negotiation. In 1000BASE-X mode the MII_ADVERTISE register will be set, so KSZ9477 driver does not need to write it. The second issue is the MII_BMCR register needs to set the exact speed and duplex mode when running in SGMII mode. During link polling the KSZ9477 will check the speed and duplex mode are different from previous ones and update the MII_BMCR register accordingly. The last issue is 1000BASE-X mode does not work with auto-negotiation on. The cause is the local port hardware does not know the link is up and so network traffic is not forwarded. The workaround is to write 2 additional bits when 1000BASE-X mode is configured. Note the SGMII interrupt in the port cannot be masked. As that interrupt is not handled in the KSZ9477 driver the SGMII interrupt bit will not be set even when the XPCS driver sets it. Signed-off-by: Tristram Ha <tristram.ha@microchip.com> Reviewed-by: Maxime Chevallier <maxime.chevallier@bootlin.com> Tested-by: Maxime Chevallier <maxime.chevallier@bootlin.com> Link: https://patch.msgid.link/20250520230720.23425-1-Tristram.Ha@microchip.com Signed-off-by: Paolo Abeni <pabeni@redhat.com>
102 lines
4.3 KiB
C
102 lines
4.3 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) 2017-2025 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_errata_monitor(struct ksz_device *dev, int port,
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u64 tx_late_col);
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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_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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void ksz9477_hsr_join(struct dsa_switch *ds, int port, struct net_device *hsr);
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void ksz9477_hsr_leave(struct dsa_switch *ds, int port, struct net_device *hsr);
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int ksz9477_port_acl_init(struct ksz_device *dev, int port);
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void ksz9477_port_acl_free(struct ksz_device *dev, int port);
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int ksz9477_cls_flower_add(struct dsa_switch *ds, int port,
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struct flow_cls_offload *cls, bool ingress);
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int ksz9477_cls_flower_del(struct dsa_switch *ds, int port,
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struct flow_cls_offload *cls, bool ingress);
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#define KSZ9477_ACL_ENTRY_SIZE 18
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#define KSZ9477_ACL_MAX_ENTRIES 16
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struct ksz9477_acl_entry {
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u8 entry[KSZ9477_ACL_ENTRY_SIZE];
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unsigned long cookie;
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u32 prio;
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};
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struct ksz9477_acl_entries {
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struct ksz9477_acl_entry entries[KSZ9477_ACL_MAX_ENTRIES];
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int entries_count;
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};
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struct ksz9477_acl_priv {
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struct ksz9477_acl_entries acles;
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};
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void ksz9477_acl_remove_entries(struct ksz_device *dev, int port,
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struct ksz9477_acl_entries *acles,
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unsigned long cookie);
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int ksz9477_acl_write_list(struct ksz_device *dev, int port);
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int ksz9477_sort_acl_entries(struct ksz_device *dev, int port);
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void ksz9477_acl_action_rule_cfg(u8 *entry, bool force_prio, u8 prio_val);
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void ksz9477_acl_processing_rule_set_action(u8 *entry, u8 action_idx);
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void ksz9477_acl_match_process_l2(struct ksz_device *dev, int port,
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u16 ethtype, u8 *src_mac, u8 *dst_mac,
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unsigned long cookie, u32 prio);
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int ksz9477_pcs_create(struct ksz_device *dev);
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#endif
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