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Realtek RTL8365MB switches (a.k.a. RTL8367C family) use two different structures for VLANs: - VLAN4K: A full table with 4096 entries defining port membership and tagging. - VLANMC: A smaller table with 32 entries used primarily for PVID assignment. In this hardware, a port's PVID must point to an index in the VLANMC table rather than a VID directly. Since the VLANMC table is limited to 32 entries, the driver implements a dynamic allocation scheme to maximize resource usage: - VLAN4K is treated by the driver as the source of truth for membership. - A VLANMC entry is only allocated when a port is configured to use a specific VID as its PVID. - VLANMC entries are deleted when no longer needed as a PVID by any port. Although VLANMC has a members field, the switch only checks membership in the VLAN4K table. This driver will use VLANMC members field as way to track which ports are using that entry as PVID. VLANMC index 0, although a valid entry, is reserved in this driver as a neutral PVID value for ports not using a specific PVID. In the subsequent RTL8367D switch family, VLANMC table was removed and PVID assignment was delegated to a dedicated set of registers. The use of FIELD_PREP for reconstructing LO/HI values was suggested by Yury Norov. Fix for vlan_setup and vlan_filtering was suggested by Abdulkader Alrezej. Suggested-by: Yury Norov <ynorov@nvidia.com> Suggested-by: Abdulkader Alrezej <abdulkader.alrezej@gmail.com> Signed-off-by: Alvin Šipraga <alsi@bang-olufsen.dk> Reviewed-by: Linus Walleij <linusw@kernel.org> Reviewed-by: Mieczyslaw Nalewaj <namiltd@yahoo.com> Co-developed-by: Luiz Angelo Daros de Luca <luizluca@gmail.com> Signed-off-by: Luiz Angelo Daros de Luca <luizluca@gmail.com> Link: https://patch.msgid.link/20260606-realtek_forward-v13-6-b9e409687cbe@gmail.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
40 lines
1.3 KiB
C
40 lines
1.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/* VLAN configuration interface for the rtl8365mb switch family
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*
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* Copyright (C) 2022 Alvin Šipraga <alsi@bang-olufsen.dk>
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*
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*/
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#ifndef _REALTEK_RTL8365MB_VLAN_H
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#define _REALTEK_RTL8365MB_VLAN_H
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#include <linux/types.h>
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#include "realtek.h"
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enum rtl8365mb_frame_ingress {
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RTL8365MB_FRAME_TYPE_ANY_FRAME = 0,
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RTL8365MB_FRAME_TYPE_TAGGED_ONLY,
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RTL8365MB_FRAME_TYPE_UNTAGGED_ONLY,
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};
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int rtl8365mb_vlan_port_get_pvid(struct realtek_priv *priv, int port,
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u16 *pvid);
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int
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rtl8365mb_vlan_port_get_framefilter(struct realtek_priv *priv,
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int port,
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enum rtl8365mb_frame_ingress *frame_type);
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int
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rtl8365mb_vlan_port_set_framefilter(struct realtek_priv *priv,
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int port,
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enum rtl8365mb_frame_ingress frame_type);
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int rtl8365mb_vlan_4k_port_add(struct dsa_switch *ds, 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 rtl8365mb_vlan_4k_port_del(struct dsa_switch *ds, int port,
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const struct switchdev_obj_port_vlan *vlan);
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int rtl8365mb_vlan_pvid_port_set(struct dsa_switch *ds, int port, u16 vid,
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struct netlink_ext_ack *extack);
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int rtl8365mb_vlan_pvid_port_clear(struct dsa_switch *ds, int port, u16 vid);
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#endif /* _REALTEK_RTL8365MB_VLAN_H */
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