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| author | Danilo Krummrich <dakr@kernel.org> | 2026-08-13 18:52:04 +0200 |
|---|---|---|
| committer | Danilo Krummrich <dakr@kernel.org> | 2026-08-17 01:41:36 +0200 |
| commit | f146c7bc85a51f95c05e0f8173d484eb301ece78 (patch) | |
| tree | 07296ae54ed6551492b0c609dc0f5463f61f89ca /net/rds/info.h | |
| download | linux-stable-f146c7bc85a51f95c05e0f8173d484eb301ece78.tar.gz linux-stable-f146c7bc85a51f95c05e0f8173d484eb301ece78.zip | |
PCI: Add pci_irq_type() to query the allocated interrupt typegrafted
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 <bhelgaas@google.com>
Tested-by: John Hubbard <jhubbard@nvidia.com>
Link: https://elixir.bootlin.com/linux/v7.1/source/drivers/net/ethernet/aquantia/atlantic/aq_pci_func.c#L196 [1]
Inspired-by: John Hubbard <jhubbard@nvidia.com>
Link: https://lore.kernel.org/all/DKKG2QM3YJYB.Z2H2B2UXJ75N@kernel.org/ [2]
Reviewed-by: Gary Guo <gary@garyguo.net>
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 <dakr@kernel.org>
Diffstat (limited to 'net/rds/info.h')
| -rw-r--r-- | net/rds/info.h | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/net/rds/info.h b/net/rds/info.h new file mode 100644 index 000000000..1aab62ab6 --- /dev/null +++ b/net/rds/info.h @@ -0,0 +1,30 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _RDS_INFO_H +#define _RDS_INFO_H + +struct rds_info_lengths { + unsigned int nr; + unsigned int each; +}; + +struct rds_info_iterator; + +/* + * These functions must fill in the fields of @lens to reflect the size + * of the available info source. If the snapshot fits in @len then it + * should be copied using @iter. The caller will deduce if it was copied + * or not by comparing the lengths. + */ +typedef void (*rds_info_func)(struct socket *sock, unsigned int len, + struct rds_info_iterator *iter, + struct rds_info_lengths *lens); + +void rds_info_register_func(int optname, rds_info_func func); +void rds_info_deregister_func(int optname, rds_info_func func); +int rds_info_getsockopt(struct socket *sock, int optname, sockopt_t *opt); +void rds_info_copy(struct rds_info_iterator *iter, void *data, + unsigned long bytes); +void rds_info_iter_unmap(struct rds_info_iterator *iter); + + +#endif |