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/llc.h | 159 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 159 insertions(+) create mode 100644 include/net/llc.h (limited to 'include/net/llc.h') diff --git a/include/net/llc.h b/include/net/llc.h new file mode 100644 index 000000000..029ba8a22 --- /dev/null +++ b/include/net/llc.h @@ -0,0 +1,159 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef LLC_H +#define LLC_H +/* + * Copyright (c) 1997 by Procom Technology, Inc. + * 2001-2003 by Arnaldo Carvalho de Melo + */ + +#include +#include +#include +#include +#include +#include +#include + +#include + +struct net_device; +struct packet_type; +struct sk_buff; + +struct llc_addr { + unsigned char lsap; + unsigned char mac[IFHWADDRLEN]; +}; + +#define LLC_SAP_STATE_INACTIVE 1 +#define LLC_SAP_STATE_ACTIVE 2 + +#define LLC_SK_DEV_HASH_BITS 6 +#define LLC_SK_DEV_HASH_ENTRIES (1<sk_dev_hash[bucket]; +} + +static inline +u32 llc_sk_laddr_hashfn(struct llc_sap *sap, const struct llc_addr *laddr) +{ + return hash_32(jhash(laddr->mac, sizeof(laddr->mac), 0), + LLC_SK_LADDR_HASH_BITS); +} + +static inline +struct hlist_nulls_head *llc_sk_laddr_hash(struct llc_sap *sap, + const struct llc_addr *laddr) +{ + return &sap->sk_laddr_hash[llc_sk_laddr_hashfn(sap, laddr)]; +} + +#define LLC_DEST_INVALID 0 /* Invalid LLC PDU type */ +#define LLC_DEST_SAP 1 /* Type 1 goes here */ +#define LLC_DEST_CONN 2 /* Type 2 goes here */ + +extern struct list_head llc_sap_list; + +int llc_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, + struct net_device *orig_dev); + +int llc_mac_hdr_init(struct sk_buff *skb, const unsigned char *sa, + const unsigned char *da); + +void llc_add_pack(int type, + void (*handler)(struct llc_sap *sap, struct sk_buff *skb)); +void llc_remove_pack(int type); + +void llc_set_station_handler(void (*handler)(struct sk_buff *skb)); + +struct llc_sap *llc_sap_open(unsigned char lsap, + int (*rcv)(struct sk_buff *skb, + struct net_device *dev, + struct packet_type *pt, + struct net_device *orig_dev)); +static inline void llc_sap_hold(struct llc_sap *sap) +{ + refcount_inc(&sap->refcnt); +} + +static inline bool llc_sap_hold_safe(struct llc_sap *sap) +{ + return refcount_inc_not_zero(&sap->refcnt); +} + +void llc_sap_close(struct llc_sap *sap); + +static inline void llc_sap_put(struct llc_sap *sap) +{ + if (refcount_dec_and_test(&sap->refcnt)) + llc_sap_close(sap); +} + +struct llc_sap *llc_sap_find(unsigned char sap_value); + +int llc_build_and_send_ui_pkt(struct llc_sap *sap, struct sk_buff *skb, + const unsigned char *dmac, unsigned char dsap); + +void llc_sap_handler(struct llc_sap *sap, struct sk_buff *skb); +void llc_conn_handler(struct llc_sap *sap, struct sk_buff *skb); + +void llc_station_init(void); +void llc_station_exit(void); + +#ifdef CONFIG_PROC_FS +int llc_proc_init(void); +void llc_proc_exit(void); +#else +#define llc_proc_init() (0) +#define llc_proc_exit() do { } while(0) +#endif /* CONFIG_PROC_FS */ +#ifdef CONFIG_SYSCTL +int llc_sysctl_init(void); +void llc_sysctl_exit(void); + +extern int sysctl_llc2_ack_timeout; +extern int sysctl_llc2_busy_timeout; +extern int sysctl_llc2_p_timeout; +extern int sysctl_llc2_rej_timeout; +#else +#define llc_sysctl_init() (0) +#define llc_sysctl_exit() do { } while(0) +#endif /* CONFIG_SYSCTL */ +#endif /* LLC_H */ -- cgit v1.3.1