From: Barry Song <21cnbao@gmail.com>
To: bhelgaas@google.com, maz@kernel.org, tglx@linutronix.de
Cc: Jonathan.Cameron@huawei.com, bilbao@vt.edu, corbet@lwn.net,
gregkh@linuxfoundation.org, leon@kernel.org,
linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org,
linuxarm@huawei.com, luzmaximilian@gmail.com,
mchehab+huawei@kernel.org, schnelle@linux.ibm.com,
jesse.brandeburg@intel.com, anthony.l.nguyen@intel.com,
intel-wired-lan@lists.osuosl.org,
Barry Song <song.bao.hua@hisilicon.com>
Subject: [PATCH v3 1/3] Documentation: ABI: sysfs-bus-pci: Add description for IRQ entry
Date: Wed, 25 Aug 2021 18:26:34 +0800 [thread overview]
Message-ID: <20210825102636.52757-2-21cnbao@gmail.com> (raw)
In-Reply-To: <20210825102636.52757-1-21cnbao@gmail.com>
From: Barry Song <song.bao.hua@hisilicon.com>
/sys/bus/pci/devices/.../irq has been there for many years but it
has never been documented. This patch is trying to document it as
what it is really implemented in the kernel code.
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Barry Song <song.bao.hua@hisilicon.com>
---
Documentation/ABI/testing/sysfs-bus-pci | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/Documentation/ABI/testing/sysfs-bus-pci b/Documentation/ABI/testing/sysfs-bus-pci
index 793cbb7..eeacdce 100644
--- a/Documentation/ABI/testing/sysfs-bus-pci
+++ b/Documentation/ABI/testing/sysfs-bus-pci
@@ -96,6 +96,16 @@ Description:
This attribute indicates the mode that the irq vector named by
the file is in (msi vs. msix)
+What: /sys/bus/pci/devices/.../irq
+Date: August 2021
+Contact: Linux PCI developers <linux-pci@vger.kernel.org>
+Description:
+ If a driver has enabled MSI (not MSI-X), "irq" contains the IRQ
+ of the first MSI vector. Otherwise "irq" contains the IRQ of
+ the legacy INTx interrupt.
+ "irq" being set to 0 indicates that the device isn't capable of
+ generating legacy INTx interrupts.
+
What: /sys/bus/pci/devices/.../remove
Date: January 2009
Contact: Linux PCI developers <linux-pci@vger.kernel.org>
--
1.8.3.1
next prev parent reply other threads:[~2021-08-25 10:27 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-25 10:26 [PATCH v3 0/3] PCI/MSI: Clarify the IRQ sysfs ABI for PCI devices Barry Song
2021-08-25 10:26 ` Barry Song [this message]
2021-08-25 10:26 ` [PATCH v3 2/3] PCI/sysfs: Don't depend on pci_dev.irq for IRQ entry Barry Song
2021-08-25 13:30 ` Marc Zyngier
2021-08-25 10:26 ` [PATCH v3 3/3] PCI/MSI: remove msi_attrib.default_irq in msi_desc Barry Song
2021-08-25 13:38 ` Marc Zyngier
2021-08-29 14:55 ` [PCI/MSI] a4fc4cf388: dmesg.genirq:Flags_mismatch_irq##(mei_me)vs.#(xhci_hcd) kernel test robot
2021-08-31 1:21 ` Barry Song
2021-08-31 1:36 ` Barry Song
2021-09-02 19:34 ` Winkler, Tomas
2021-10-03 8:32 ` Barry Song
2021-10-15 14:45 ` [LKP] " Carel Si
2021-10-16 0:08 ` Barry Song
2021-10-19 6:52 ` Carel Si
2021-08-31 8:08 ` Marc Zyngier
2021-08-31 21:36 ` Barry Song
2021-09-01 13:09 ` Marc Zyngier
2021-10-16 10:11 ` [PATCH v3 0/3] PCI/MSI: Clarify the IRQ sysfs ABI for PCI devices Barry Song
2021-10-18 21:50 ` Bjorn Helgaas
2021-10-19 7:39 ` Marc Zyngier
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