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| author | Neil Horman <nhorman@tuxdriver.com> | 2011-10-06 14:08:18 -0400 |
|---|---|---|
| committer | Jesse Barnes <jbarnes@virtuousgeek.org> | 2012-01-06 12:10:25 -0800 |
| commit | da8d1c8ba4dcb16d60be54b233deca9a7cac98dc (patch) | |
| tree | ac4713f9dd29aab4d4d5b167cf61081aeb2ccdb4 /Documentation | |
| parent | 8b6a5af92c03b363df050da906480085b6cd6e00 (diff) | |
| download | op-kernel-dev-da8d1c8ba4dcb16d60be54b233deca9a7cac98dc.zip op-kernel-dev-da8d1c8ba4dcb16d60be54b233deca9a7cac98dc.tar.gz | |
PCI/sysfs: add per pci device msi[x] irq listing (v5)
This patch adds a per-pci-device subdirectory in sysfs called:
/sys/bus/pci/devices/<device>/msi_irqs
This sub-directory exports the set of msi vectors allocated by a given
pci device, by creating a numbered sub-directory for each vector beneath
msi_irqs. For each vector various attributes can be exported.
Currently the only attribute is called mode, which tracks the
operational mode of that vector (msi vs. msix)
Acked-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-bus-pci | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-bus-pci b/Documentation/ABI/testing/sysfs-bus-pci index 349ecf2..34f5110 100644 --- a/Documentation/ABI/testing/sysfs-bus-pci +++ b/Documentation/ABI/testing/sysfs-bus-pci @@ -66,6 +66,24 @@ Description: re-discover previously removed devices. Depends on CONFIG_HOTPLUG. +What: /sys/bus/pci/devices/.../msi_irqs/ +Date: September, 2011 +Contact: Neil Horman <nhorman@tuxdriver.com> +Description: + The /sys/devices/.../msi_irqs directory contains a variable set + of sub-directories, with each sub-directory being named after a + corresponding msi irq vector allocated to that device. Each + numbered sub-directory N contains attributes of that irq. + Note that this directory is not created for device drivers which + do not support msi irqs + +What: /sys/bus/pci/devices/.../msi_irqs/<N>/mode +Date: September 2011 +Contact: Neil Horman <nhorman@tuxdriver.com> +Description: + This attribute indicates the mode that the irq vector named by + the parent directory is in (msi vs. msix) + What: /sys/bus/pci/devices/.../remove Date: January 2009 Contact: Linux PCI developers <linux-pci@vger.kernel.org> |
