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 --- fs/dlm/lowcomms.h | 55 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 55 insertions(+) create mode 100644 fs/dlm/lowcomms.h (limited to 'fs/dlm/lowcomms.h') diff --git a/fs/dlm/lowcomms.h b/fs/dlm/lowcomms.h new file mode 100644 index 000000000..fd0df604e --- /dev/null +++ b/fs/dlm/lowcomms.h @@ -0,0 +1,55 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/****************************************************************************** +******************************************************************************* +** +** Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. +** Copyright (C) 2004-2009 Red Hat, Inc. All rights reserved. +** +** +******************************************************************************* +******************************************************************************/ + +#ifndef __LOWCOMMS_DOT_H__ +#define __LOWCOMMS_DOT_H__ + +#include "dlm_internal.h" + +#define DLM_MIDCOMMS_OPT_LEN sizeof(struct dlm_opts) +#define DLM_MAX_APP_BUFSIZE (DLM_MAX_SOCKET_BUFSIZE - \ + DLM_MIDCOMMS_OPT_LEN) + +#define CONN_HASH_SIZE 32 + +/* This is deliberately very simple because most clusters have simple + * sequential nodeids, so we should be able to go straight to a connection + * struct in the array + */ +static inline int nodeid_hash(int nodeid) +{ + return nodeid & (CONN_HASH_SIZE-1); +} + +/* check if dlm is running */ +bool dlm_lowcomms_is_running(void); + +int dlm_lowcomms_start(void); +void dlm_lowcomms_shutdown(void); +void dlm_lowcomms_shutdown_node(int nodeid, bool force); +void dlm_lowcomms_stop(void); +void dlm_lowcomms_init(void); +void dlm_lowcomms_exit(void); +int dlm_lowcomms_close(int nodeid); +struct dlm_msg *dlm_lowcomms_new_msg(int nodeid, int len, char **ppc, + void (*cb)(void *data), void *data); +void dlm_lowcomms_commit_msg(struct dlm_msg *msg); +void dlm_lowcomms_put_msg(struct dlm_msg *msg); +int dlm_lowcomms_resend_msg(struct dlm_msg *msg); +int dlm_lowcomms_connect_node(int nodeid); +int dlm_lowcomms_nodes_set_mark(int nodeid, unsigned int mark); +int dlm_lowcomms_addr(int nodeid, struct sockaddr_storage *addr); +void dlm_midcomms_receive_done(int nodeid); +struct kmem_cache *dlm_lowcomms_writequeue_cache_create(void); +struct kmem_cache *dlm_lowcomms_msg_cache_create(void); + +#endif /* __LOWCOMMS_DOT_H__ */ + -- cgit v1.3.1