Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id B44E3C433F5 for ; Wed, 15 Dec 2021 12:13:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S242444AbhLOMND (ORCPT ); Wed, 15 Dec 2021 07:13:03 -0500 Received: from esa.microchip.iphmx.com ([68.232.154.123]:56190 "EHLO esa.microchip.iphmx.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S242425AbhLOMMr (ORCPT ); Wed, 15 Dec 2021 07:12:47 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=microchip.com; i=@microchip.com; q=dns/txt; s=mchp; t=1639570366; x=1671106366; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=LAEr64Qd2uasokxhNaOcYOdnKgvMaOjskncKxyqUSKk=; b=GN0Qi5DX+TrArCCKPwlADwKQU1+BVhswe/B02AQhU8AoDUyGNv9SlsPK Qug5p/gWGkNbgEOy9teyDjN6rasmxnW3rFhi3jbmaCz/gbKyctCcRDH1C V9yuyevAZWSK/j81Et/4zcMYR1wRcJGYqQmO8kBviQM/GU103aLgJ5yMy vc8/kmMi7MzAmA3Z9RAuvbNWtR5mCukKWlcVR+Mlt5seLPphkfIthmvc9 6USexjNlC2F2FBSVFontqCTmiocmOh1eGgiBBqO8zE28UQHeiR+hESOzn I+tf1RoaPUxbwY+g9cu/YNmwHPZjZZE5aq4l72JB3VcvAmBs3OridMNt6 A==; IronPort-SDR: wQWmPd3SutCKBPCUVZiM8BM3p/IL6afzAV8t8IM7Z0v7YOKRurdJ2bS2FLLMnmuAfVIE/F+fFb gWxWHumwmER5dGKimahkixsbMITJTHVe9kdkrav3XaGG7j+kXw8AqKal2r9jkbdPQvVhmNWd5S u14iD0tk5VFAgTxsZABW9BoXg370QxA+CLGQzxLCKWwscZBci1Aucqk97FcEE4+8yTL+Rx3O1c gJNZMjwVIyZHJWTJvelRoRKa0fBbRcCNBbY0qYonGK9N4IyUaem7D9b06UBUjX3kTZVAQVPmEl U1FOoW90myctKVWnDa45+FXl X-IronPort-AV: E=Sophos;i="5.88,207,1635231600"; d="scan'208";a="139847927" Received: from smtpout.microchip.com (HELO email.microchip.com) ([198.175.253.82]) by esa4.microchip.iphmx.com with ESMTP/TLS/AES256-SHA256; 15 Dec 2021 05:12:45 -0700 Received: from chn-vm-ex01.mchp-main.com (10.10.85.143) by chn-vm-ex02.mchp-main.com (10.10.85.144) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.17; Wed, 15 Dec 2021 05:12:45 -0700 Received: from soft-dev3-1.microsemi.net (10.10.115.15) by chn-vm-ex01.mchp-main.com (10.10.85.143) with Microsoft SMTP Server id 15.1.2375.17 via Frontend Transport; Wed, 15 Dec 2021 05:12:43 -0700 From: Horatiu Vultur To: , , CC: , , , , , , , , , Horatiu Vultur Subject: [PATCH net-next v5 9/9] net: lan966x: Extend switchdev with fdb support Date: Wed, 15 Dec 2021 13:13:09 +0100 Message-ID: <20211215121309.3669119-10-horatiu.vultur@microchip.com> X-Mailer: git-send-email 2.33.0 In-Reply-To: <20211215121309.3669119-1-horatiu.vultur@microchip.com> References: <20211215121309.3669119-1-horatiu.vultur@microchip.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Extend lan966x driver with fdb support by implementing the switchdev calls SWITCHDEV_FDB_ADD_TO_DEVICE and SWITCHDEV_FDB_DEL_TO_DEVICE. Signed-off-by: Horatiu Vultur --- .../net/ethernet/microchip/lan966x/Makefile | 2 +- .../ethernet/microchip/lan966x/lan966x_fdb.c | 246 ++++++++++++++++++ .../ethernet/microchip/lan966x/lan966x_main.c | 8 + .../ethernet/microchip/lan966x/lan966x_main.h | 14 + .../microchip/lan966x/lan966x_switchdev.c | 21 ++ .../ethernet/microchip/lan966x/lan966x_vlan.c | 4 + 6 files changed, 294 insertions(+), 1 deletion(-) create mode 100644 drivers/net/ethernet/microchip/lan966x/lan966x_fdb.c diff --git a/drivers/net/ethernet/microchip/lan966x/Makefile b/drivers/net/ethernet/microchip/lan966x/Makefile index d82e896c2e53..ec1a1fa8b0d5 100644 --- a/drivers/net/ethernet/microchip/lan966x/Makefile +++ b/drivers/net/ethernet/microchip/lan966x/Makefile @@ -7,4 +7,4 @@ obj-$(CONFIG_LAN966X_SWITCH) += lan966x-switch.o lan966x-switch-objs := lan966x_main.o lan966x_phylink.o lan966x_port.o \ lan966x_mac.o lan966x_ethtool.o lan966x_switchdev.o \ - lan966x_vlan.o + lan966x_vlan.o lan966x_fdb.o diff --git a/drivers/net/ethernet/microchip/lan966x/lan966x_fdb.c b/drivers/net/ethernet/microchip/lan966x/lan966x_fdb.c new file mode 100644 index 000000000000..660dae324e32 --- /dev/null +++ b/drivers/net/ethernet/microchip/lan966x/lan966x_fdb.c @@ -0,0 +1,246 @@ +// SPDX-License-Identifier: GPL-2.0+ + +#include + +#include "lan966x_main.h" + +struct lan966x_fdb_event_work { + struct work_struct work; + struct switchdev_notifier_fdb_info fdb_info; + struct net_device *dev; + struct lan966x *lan966x; + unsigned long event; +}; + +struct lan966x_fdb_entry { + struct list_head list; + unsigned char mac[ETH_ALEN] __aligned(2); + u16 vid; + u32 references; +}; + +static struct lan966x_fdb_entry * +lan966x_fdb_find_entry(struct lan966x *lan966x, + struct switchdev_notifier_fdb_info *fdb_info) +{ + struct lan966x_fdb_entry *fdb_entry; + + list_for_each_entry(fdb_entry, &lan966x->fdb_entries, list) { + if (fdb_entry->vid == fdb_info->vid && + ether_addr_equal(fdb_entry->mac, fdb_info->addr)) + return fdb_entry; + } + + return NULL; +} + +static void lan966x_fdb_add_entry(struct lan966x *lan966x, + struct switchdev_notifier_fdb_info *fdb_info) +{ + struct lan966x_fdb_entry *fdb_entry; + + fdb_entry = lan966x_fdb_find_entry(lan966x, fdb_info); + if (fdb_entry) { + fdb_entry->references++; + return; + } + + fdb_entry = kzalloc(sizeof(*fdb_entry), GFP_KERNEL); + if (!fdb_entry) + return; + + memcpy(fdb_entry->mac, fdb_info->addr, ETH_ALEN); + fdb_entry->vid = fdb_info->vid; + fdb_entry->references = 1; + list_add_tail(&fdb_entry->list, &lan966x->fdb_entries); +} + +static bool lan966x_fdb_del_entry(struct lan966x *lan966x, + struct switchdev_notifier_fdb_info *fdb_info) +{ + struct lan966x_fdb_entry *fdb_entry, *tmp; + + list_for_each_entry_safe(fdb_entry, tmp, &lan966x->fdb_entries, + list) { + if (fdb_entry->vid == fdb_info->vid && + ether_addr_equal(fdb_entry->mac, fdb_info->addr)) { + fdb_entry->references--; + if (!fdb_entry->references) { + list_del(&fdb_entry->list); + kfree(fdb_entry); + return true; + } + break; + } + } + + return false; +} + +void lan966x_fdb_write_entries(struct lan966x *lan966x, u16 vid) +{ + struct lan966x_fdb_entry *fdb_entry; + + list_for_each_entry(fdb_entry, &lan966x->fdb_entries, list) { + if (fdb_entry->vid != vid) + continue; + + lan966x_mac_cpu_learn(lan966x, fdb_entry->mac, fdb_entry->vid); + } +} + +void lan966x_fdb_erase_entries(struct lan966x *lan966x, u16 vid) +{ + struct lan966x_fdb_entry *fdb_entry; + + list_for_each_entry(fdb_entry, &lan966x->fdb_entries, list) { + if (fdb_entry->vid != vid) + continue; + + lan966x_mac_cpu_forget(lan966x, fdb_entry->mac, fdb_entry->vid); + } +} + +static void lan966x_fdb_purge_entries(struct lan966x *lan966x) +{ + struct lan966x_fdb_entry *fdb_entry, *tmp; + + list_for_each_entry_safe(fdb_entry, tmp, &lan966x->fdb_entries, list) { + list_del(&fdb_entry->list); + kfree(fdb_entry); + } +} + +int lan966x_fdb_init(struct lan966x *lan966x) +{ + INIT_LIST_HEAD(&lan966x->fdb_entries); + lan966x->fdb_work = alloc_ordered_workqueue("lan966x_order", 0); + if (!lan966x->fdb_work) + return -ENOMEM; + + return 0; +} + +void lan966x_fdb_deinit(struct lan966x *lan966x) +{ + destroy_workqueue(lan966x->fdb_work); + lan966x_fdb_purge_entries(lan966x); +} + +static void lan966x_fdb_event_work(struct work_struct *work) +{ + struct lan966x_fdb_event_work *fdb_work = + container_of(work, struct lan966x_fdb_event_work, work); + struct switchdev_notifier_fdb_info *fdb_info; + struct net_device *dev = fdb_work->dev; + struct lan966x_port *port; + struct lan966x *lan966x; + + fdb_info = &fdb_work->fdb_info; + lan966x = fdb_work->lan966x; + + if (lan966x_netdevice_check(dev)) { + port = netdev_priv(dev); + + switch (fdb_work->event) { + case SWITCHDEV_FDB_ADD_TO_DEVICE: + if (!fdb_info->added_by_user) + break; + lan966x_mac_add_entry(lan966x, port, fdb_info->addr, + fdb_info->vid); + break; + case SWITCHDEV_FDB_DEL_TO_DEVICE: + if (!fdb_info->added_by_user) + break; + lan966x_mac_del_entry(lan966x, fdb_info->addr, + fdb_info->vid); + break; + } + } else { + if (!netif_is_bridge_master(dev)) + goto out; + + /* If the CPU is not part of the vlan then there is no point + * to copy the frames to the CPU because they will be dropped + */ + if (!lan966x_vlan_cpu_member_cpu_vlan_mask(lan966x, + fdb_info->vid)) + goto out; + + /* In case the bridge is called */ + switch (fdb_work->event) { + case SWITCHDEV_FDB_ADD_TO_DEVICE: + /* If there is no front port in this vlan, there is no + * point to copy the frame to CPU because it would be + * just dropped at later point. So add it only if + * there is a port but it is required to store the fdb + * entry for later point when a port actually gets in + * the vlan. + */ + lan966x_fdb_add_entry(lan966x, fdb_info); + if (!lan966x_vlan_port_any_vlan_mask(lan966x, + fdb_info->vid)) + break; + + lan966x_mac_cpu_learn(lan966x, fdb_info->addr, + fdb_info->vid); + break; + case SWITCHDEV_FDB_DEL_TO_DEVICE: + /* It is OK to always forget the entry */ + if (lan966x_fdb_del_entry(lan966x, fdb_info)) + lan966x_mac_cpu_forget(lan966x, fdb_info->addr, + fdb_info->vid); + break; + } + } + +out: + kfree(fdb_work->fdb_info.addr); + kfree(fdb_work); + dev_put(dev); +} + +int lan966x_handle_fdb(struct net_device *dev, + struct net_device *orig_dev, + unsigned long event, const void *ctx, + const struct switchdev_notifier_fdb_info *fdb_info) +{ + struct lan966x_port *port = netdev_priv(dev); + struct lan966x *lan966x = port->lan966x; + struct lan966x_fdb_event_work *fdb_work; + + if (ctx && ctx != port) + return 0; + + switch (event) { + case SWITCHDEV_FDB_ADD_TO_DEVICE: + case SWITCHDEV_FDB_DEL_TO_DEVICE: + if (lan966x_netdevice_check(orig_dev) && + !fdb_info->added_by_user) + break; + + fdb_work = kzalloc(sizeof(*fdb_work), GFP_ATOMIC); + if (!fdb_work) + return -ENOMEM; + + fdb_work->dev = orig_dev; + fdb_work->lan966x = lan966x; + fdb_work->event = event; + INIT_WORK(&fdb_work->work, lan966x_fdb_event_work); + memcpy(&fdb_work->fdb_info, fdb_info, sizeof(fdb_work->fdb_info)); + fdb_work->fdb_info.addr = kzalloc(ETH_ALEN, GFP_ATOMIC); + if (!fdb_work->fdb_info.addr) + goto err_addr_alloc; + + ether_addr_copy((u8 *)fdb_work->fdb_info.addr, fdb_info->addr); + dev_hold(orig_dev); + + queue_work(lan966x->fdb_work, &fdb_work->work); + break; + } + + return 0; +err_addr_alloc: + kfree(fdb_work); + return -ENOMEM; +} diff --git a/drivers/net/ethernet/microchip/lan966x/lan966x_main.c b/drivers/net/ethernet/microchip/lan966x/lan966x_main.c index 881c1678f3e9..4f2d3e99e702 100644 --- a/drivers/net/ethernet/microchip/lan966x/lan966x_main.c +++ b/drivers/net/ethernet/microchip/lan966x/lan966x_main.c @@ -937,8 +937,15 @@ static int lan966x_probe(struct platform_device *pdev) lan966x_register_notifier_blocks(lan966x); + err = lan966x_fdb_init(lan966x); + if (err) + goto unregister_notifier_blocks; + return 0; +unregister_notifier_blocks: + lan966x_unregister_notifier_blocks(lan966x); + cleanup_ports: fwnode_handle_put(portnp); @@ -965,6 +972,7 @@ static int lan966x_remove(struct platform_device *pdev) lan966x_mac_purge_entries(lan966x); lan966x_ext_purge_entries(); + lan966x_fdb_deinit(lan966x); return 0; } diff --git a/drivers/net/ethernet/microchip/lan966x/lan966x_main.h b/drivers/net/ethernet/microchip/lan966x/lan966x_main.h index 6d0d922617ae..91b2cf069b4b 100644 --- a/drivers/net/ethernet/microchip/lan966x/lan966x_main.h +++ b/drivers/net/ethernet/microchip/lan966x/lan966x_main.h @@ -8,6 +8,7 @@ #include #include #include +#include #include "lan966x_regs.h" #include "lan966x_ifh.h" @@ -100,6 +101,10 @@ struct lan966x { /* interrupts */ int xtr_irq; int ana_irq; + + /* worqueue for fdb */ + struct workqueue_struct *fdb_work; + struct list_head fdb_entries; }; struct lan966x_port_config { @@ -206,6 +211,15 @@ int lan966x_vlan_cpu_del_vlan(struct lan966x *lan966x, struct net_device *dev, u16 vid); +void lan966x_fdb_write_entries(struct lan966x *lan966x, u16 vid); +void lan966x_fdb_erase_entries(struct lan966x *lan966x, u16 vid); +int lan966x_fdb_init(struct lan966x *lan966x); +void lan966x_fdb_deinit(struct lan966x *lan966x); +int lan966x_handle_fdb(struct net_device *dev, + struct net_device *orig_dev, + unsigned long event, const void *ctx, + const struct switchdev_notifier_fdb_info *fdb_info); + static inline void __iomem *lan_addr(void __iomem *base[], int id, int tinst, int tcnt, int gbase, int ginst, diff --git a/drivers/net/ethernet/microchip/lan966x/lan966x_switchdev.c b/drivers/net/ethernet/microchip/lan966x/lan966x_switchdev.c index 560486267695..2afcf454ede5 100644 --- a/drivers/net/ethernet/microchip/lan966x/lan966x_switchdev.c +++ b/drivers/net/ethernet/microchip/lan966x/lan966x_switchdev.c @@ -375,6 +375,19 @@ static int lan966x_netdevice_event(struct notifier_block *nb, return notifier_from_errno(ret); } +static bool lan966x_foreign_dev_check(const struct net_device *dev, + const struct net_device *foreign_dev) +{ + struct lan966x_port *port = netdev_priv(dev); + struct lan966x *lan966x = port->lan966x; + + if (netif_is_bridge_master(foreign_dev)) + if (lan966x->bridge != foreign_dev) + return true; + + return false; +} + static int lan966x_switchdev_event(struct notifier_block *nb, unsigned long event, void *ptr) { @@ -387,6 +400,14 @@ static int lan966x_switchdev_event(struct notifier_block *nb, lan966x_netdevice_check, lan966x_port_attr_set); return notifier_from_errno(err); + case SWITCHDEV_FDB_ADD_TO_DEVICE: + case SWITCHDEV_FDB_DEL_TO_DEVICE: + err = switchdev_handle_fdb_event_to_device(dev, event, ptr, + lan966x_netdevice_check, + lan966x_foreign_dev_check, + lan966x_handle_fdb, + NULL); + return notifier_from_errno(err); } return NOTIFY_DONE; diff --git a/drivers/net/ethernet/microchip/lan966x/lan966x_vlan.c b/drivers/net/ethernet/microchip/lan966x/lan966x_vlan.c index e8ff95bb65fa..7c4ceb8c9386 100644 --- a/drivers/net/ethernet/microchip/lan966x/lan966x_vlan.c +++ b/drivers/net/ethernet/microchip/lan966x/lan966x_vlan.c @@ -301,6 +301,7 @@ int lan966x_vlan_port_add_vlan(struct lan966x_port *port, lan966x_mac_cpu_learn(lan966x, port->dev->dev_addr, vid); lan966x_mac_cpu_learn(lan966x, lan966x->bridge->dev_addr, vid); lan966x_vlan_cpu_add_vlan_mask(lan966x, vid); + lan966x_fdb_write_entries(lan966x, vid); } lan966x_vlan_port_set_vid(port, vid, pvid, untagged); @@ -332,6 +333,7 @@ int lan966x_vlan_port_del_vlan(struct lan966x_port *port, if (!lan966x_vlan_port_any_vlan_mask(lan966x, vid)) { lan966x_mac_cpu_forget(lan966x, lan966x->bridge->dev_addr, vid); lan966x_vlan_cpu_del_vlan_mask(lan966x, vid); + lan966x_fdb_erase_entries(lan966x, vid); } return 0; @@ -371,6 +373,7 @@ int lan966x_vlan_cpu_add_vlan(struct lan966x *lan966x, } lan966x_vlan_cpu_add_cpu_vlan_mask(lan966x, vid); + lan966x_fdb_write_entries(lan966x, vid); return 0; } @@ -401,6 +404,7 @@ int lan966x_vlan_cpu_del_vlan(struct lan966x *lan966x, /* Remove the CPU part of the vlan */ lan966x_vlan_cpu_del_cpu_vlan_mask(lan966x, vid); lan966x_vlan_cpu_del_vlan_mask(lan966x, vid); + lan966x_fdb_erase_entries(lan966x, vid); return 0; } -- 2.33.0