From f146c7bc85a51f95c05e0f8173d484eb301ece78 Mon Sep 17 00:00:00 2001 From: Danilo Krummrich Date: Thu, 13 Aug 2026 18:52:04 +0200 Subject: PCI: Add pci_irq_type() to query the allocated interrupt type Add a helper that returns PCI_IRQ_MSIX, PCI_IRQ_MSI, or PCI_IRQ_INTX based on the interrupt type the PCI core selected after pci_alloc_irq_vectors(). Several drivers already open-code this check against pdev->msix_enabled and pdev->msi_enabled, or even open code this helper [1]. A common helper avoids the duplication and keeps drivers from accessing the bitfield directly (see also [2]). Acked-by: Bjorn Helgaas Tested-by: John Hubbard Link: https://elixir.bootlin.com/linux/v7.1/source/drivers/net/ethernet/aquantia/atlantic/aq_pci_func.c#L196 [1] Inspired-by: John Hubbard Link: https://lore.kernel.org/all/DKKG2QM3YJYB.Z2H2B2UXJ75N@kernel.org/ [2] Reviewed-by: Gary Guo Link: https://patch.msgid.link/20260813165234.620555-5-dakr@kernel.org [ Add missing pci_irq_type() stub for CONFIG_PCI=n. ] Signed-off-by: Danilo Krummrich --- include/net/l3mdev.h | 364 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 364 insertions(+) create mode 100644 include/net/l3mdev.h (limited to 'include/net/l3mdev.h') diff --git a/include/net/l3mdev.h b/include/net/l3mdev.h new file mode 100644 index 000000000..710e98665 --- /dev/null +++ b/include/net/l3mdev.h @@ -0,0 +1,364 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * include/net/l3mdev.h - L3 master device API + * Copyright (c) 2015 Cumulus Networks + * Copyright (c) 2015 David Ahern + */ +#ifndef _NET_L3MDEV_H_ +#define _NET_L3MDEV_H_ + +#include +#include + +enum l3mdev_type { + L3MDEV_TYPE_UNSPEC, + L3MDEV_TYPE_VRF, + __L3MDEV_TYPE_MAX +}; + +#define L3MDEV_TYPE_MAX (__L3MDEV_TYPE_MAX - 1) + +typedef int (*lookup_by_table_id_t)(struct net *net, u32 table_d); + +/** + * struct l3mdev_ops - l3mdev operations + * + * @l3mdev_fib_table: Get FIB table id to use for lookups + * + * @l3mdev_l3_rcv: Hook in L3 receive path + * + * @l3mdev_l3_out: Hook in L3 output path + * + * @l3mdev_link_scope_lookup: IPv6 lookup for linklocal and mcast destinations + */ + +struct l3mdev_ops { + u32 (*l3mdev_fib_table)(const struct net_device *dev); + struct sk_buff * (*l3mdev_l3_rcv)(struct net_device *dev, + struct sk_buff *skb, u16 proto); + struct sk_buff * (*l3mdev_l3_out)(struct net_device *dev, + struct sock *sk, struct sk_buff *skb, + u16 proto); + + /* IPv6 ops */ + struct dst_entry * (*l3mdev_link_scope_lookup)(const struct net_device *dev, + struct flowi6 *fl6); +}; + +#ifdef CONFIG_NET_L3_MASTER_DEV + +int l3mdev_table_lookup_register(enum l3mdev_type l3type, + lookup_by_table_id_t fn); + +void l3mdev_table_lookup_unregister(enum l3mdev_type l3type, + lookup_by_table_id_t fn); + +int l3mdev_ifindex_lookup_by_table_id(enum l3mdev_type l3type, struct net *net, + u32 table_id); + +int l3mdev_fib_rule_match(struct net *net, struct flowi *fl, + struct fib_lookup_arg *arg); + +static inline +bool l3mdev_fib_rule_iif_match(const struct flowi *fl, int iifindex) +{ + return !(fl->flowi_flags & FLOWI_FLAG_L3MDEV_OIF) && + fl->flowi_l3mdev == iifindex; +} + +static inline +bool l3mdev_fib_rule_oif_match(const struct flowi *fl, int oifindex) +{ + return fl->flowi_flags & FLOWI_FLAG_L3MDEV_OIF && + fl->flowi_l3mdev == oifindex; +} + +void l3mdev_update_flow(struct net *net, struct flowi *fl); + +int l3mdev_master_ifindex_rcu(const struct net_device *dev); +static inline int l3mdev_master_ifindex(struct net_device *dev) +{ + int ifindex; + + rcu_read_lock(); + ifindex = l3mdev_master_ifindex_rcu(dev); + rcu_read_unlock(); + + return ifindex; +} + +static inline int l3mdev_master_ifindex_by_index(struct net *net, int ifindex) +{ + struct net_device *dev; + int rc = 0; + + if (ifindex) { + rcu_read_lock(); + + dev = dev_get_by_index_rcu(net, ifindex); + if (dev) + rc = l3mdev_master_ifindex_rcu(dev); + + rcu_read_unlock(); + } + + return rc; +} + +static inline +struct net_device *l3mdev_master_dev_rcu(const struct net_device *_dev) +{ + /* netdev_master_upper_dev_get_rcu calls + * list_first_or_null_rcu to walk the upper dev list. + * list_first_or_null_rcu does not handle a const arg. We aren't + * making changes, just want the master device from that list so + * typecast to remove the const + */ + struct net_device *dev = (struct net_device *)_dev; + struct net_device *master; + + if (!dev) + return NULL; + + if (netif_is_l3_master(dev)) + master = dev; + else if (netif_is_l3_slave(dev)) + master = netdev_master_upper_dev_get_rcu(dev); + else + master = NULL; + + return master; +} + +int l3mdev_master_upper_ifindex_by_index_rcu(struct net *net, int ifindex); +static inline +int l3mdev_master_upper_ifindex_by_index(struct net *net, int ifindex) +{ + rcu_read_lock(); + ifindex = l3mdev_master_upper_ifindex_by_index_rcu(net, ifindex); + rcu_read_unlock(); + + return ifindex; +} + +u32 l3mdev_fib_table_rcu(const struct net_device *dev); +u32 l3mdev_fib_table_by_index(struct net *net, int ifindex); +static inline u32 l3mdev_fib_table(const struct net_device *dev) +{ + u32 tb_id; + + rcu_read_lock(); + tb_id = l3mdev_fib_table_rcu(dev); + rcu_read_unlock(); + + return tb_id; +} + +static inline bool netif_index_is_l3_master(struct net *net, int ifindex) +{ + struct net_device *dev; + bool rc = false; + + if (ifindex == 0) + return false; + + rcu_read_lock(); + + dev = dev_get_by_index_rcu(net, ifindex); + if (dev) + rc = netif_is_l3_master(dev); + + rcu_read_unlock(); + + return rc; +} + +struct dst_entry *l3mdev_link_scope_lookup(struct net *net, struct flowi6 *fl6); + +static inline +struct sk_buff *l3mdev_l3_rcv(struct sk_buff *skb, u16 proto) +{ + struct net_device *master = NULL; + + if (netif_is_l3_slave(skb->dev)) + master = netdev_master_upper_dev_get_rcu(skb->dev); + else if (netif_is_l3_master(skb->dev) || + netif_has_l3_rx_handler(skb->dev)) + master = skb->dev; + + if (master && master->l3mdev_ops->l3mdev_l3_rcv) + skb = master->l3mdev_ops->l3mdev_l3_rcv(master, skb, proto); + + return skb; +} + +static inline +struct sk_buff *l3mdev_ip_rcv(struct sk_buff *skb) +{ + return l3mdev_l3_rcv(skb, AF_INET); +} + +static inline +struct sk_buff *l3mdev_ip6_rcv(struct sk_buff *skb) +{ + return l3mdev_l3_rcv(skb, AF_INET6); +} + +static inline +struct sk_buff *l3mdev_l3_out(struct sock *sk, struct sk_buff *skb, u16 proto) +{ + struct net_device *dev; + + rcu_read_lock(); + dev = skb_dst_dev_rcu(skb); + if (netif_is_l3_slave(dev)) { + struct net_device *master; + + master = netdev_master_upper_dev_get_rcu(dev); + if (master && master->l3mdev_ops->l3mdev_l3_out) + skb = master->l3mdev_ops->l3mdev_l3_out(master, sk, + skb, proto); + } + rcu_read_unlock(); + + return skb; +} + +static inline +struct sk_buff *l3mdev_ip_out(struct sock *sk, struct sk_buff *skb) +{ + return l3mdev_l3_out(sk, skb, AF_INET); +} + +static inline +struct sk_buff *l3mdev_ip6_out(struct sock *sk, struct sk_buff *skb) +{ + return l3mdev_l3_out(sk, skb, AF_INET6); +} +#else + +static inline int l3mdev_master_ifindex_rcu(const struct net_device *dev) +{ + return 0; +} +static inline int l3mdev_master_ifindex(struct net_device *dev) +{ + return 0; +} + +static inline int l3mdev_master_ifindex_by_index(struct net *net, int ifindex) +{ + return 0; +} + +static inline +int l3mdev_master_upper_ifindex_by_index_rcu(struct net *net, int ifindex) +{ + return 0; +} +static inline +int l3mdev_master_upper_ifindex_by_index(struct net *net, int ifindex) +{ + return 0; +} + +static inline +struct net_device *l3mdev_master_dev_rcu(const struct net_device *dev) +{ + return NULL; +} + +static inline u32 l3mdev_fib_table_rcu(const struct net_device *dev) +{ + return 0; +} +static inline u32 l3mdev_fib_table(const struct net_device *dev) +{ + return 0; +} +static inline u32 l3mdev_fib_table_by_index(struct net *net, int ifindex) +{ + return 0; +} + +static inline bool netif_index_is_l3_master(struct net *net, int ifindex) +{ + return false; +} + +static inline +struct dst_entry *l3mdev_link_scope_lookup(struct net *net, struct flowi6 *fl6) +{ + return NULL; +} + +static inline +struct sk_buff *l3mdev_ip_rcv(struct sk_buff *skb) +{ + return skb; +} + +static inline +struct sk_buff *l3mdev_ip6_rcv(struct sk_buff *skb) +{ + return skb; +} + +static inline +struct sk_buff *l3mdev_ip_out(struct sock *sk, struct sk_buff *skb) +{ + return skb; +} + +static inline +struct sk_buff *l3mdev_ip6_out(struct sock *sk, struct sk_buff *skb) +{ + return skb; +} + +static inline +int l3mdev_table_lookup_register(enum l3mdev_type l3type, + lookup_by_table_id_t fn) +{ + return -EOPNOTSUPP; +} + +static inline +void l3mdev_table_lookup_unregister(enum l3mdev_type l3type, + lookup_by_table_id_t fn) +{ +} + +static inline +int l3mdev_ifindex_lookup_by_table_id(enum l3mdev_type l3type, struct net *net, + u32 table_id) +{ + return -ENODEV; +} + +static inline +int l3mdev_fib_rule_match(struct net *net, struct flowi *fl, + struct fib_lookup_arg *arg) +{ + return 1; +} + +static inline +bool l3mdev_fib_rule_iif_match(const struct flowi *fl, int iifindex) +{ + return false; +} + +static inline +bool l3mdev_fib_rule_oif_match(const struct flowi *fl, int oifindex) +{ + return false; +} + +static inline +void l3mdev_update_flow(struct net *net, struct flowi *fl) +{ +} +#endif + +#endif /* _NET_L3MDEV_H_ */ -- cgit v1.3.1