Shay Says:
==========
Introduce auxiliary bus IRQs sysfs
Today, PCI PFs and VFs, which are anchored on the PCI bus, display their
IRQ information in the <pci_device>/msi_irqs/<irq_num> sysfs files. PCI
subfunctions (SFs) are similar to PFs and VFs and these SFs are anchored
on the auxiliary bus. However, these PCI SFs lack such IRQ information
on the auxiliary bus, leaving users without visibility into which IRQs
are used by the SFs. This absence makes it impossible to debug
situations and to understand the source of interrupts/SFs for
performance tuning and debug.
Additionally, the SFs are multifunctional devices supporting RDMA,
network devices, clocks, and more, similar to their peer PCI PFs and
VFs. Therefore, it is desirable to have SFs' IRQ information available
at the bus/device level.
To overcome the above limitations, this short series extends the
auxiliary bus to display IRQ information in sysfs, similar to that of
PFs and VFs.
It adds an 'irqs' directory under the auxiliary device and includes an
<irq_num> sysfs file within it.
For example:
$ ls /sys/bus/auxiliary/devices/mlx5_core.sf.1/irqs/
50 51 52 53 54 55 56 57 58
Patch summary:
patch-1 adds auxiliary bus to support irqs used by auxiliary device
patch-2 mlx5 driver using exposing irqs for PCI SF devices via auxiliary
bus
==========
-----BEGIN PGP SIGNATURE-----
iQEzBAABCAAdFiEEGhZs6bAKwk/OTgTpSD+KveBX+j4FAmaQTCYACgkQSD+KveBX
+j7nRAgAhyi8mD93AjpoXX8onbK3ZyPnGwLToCs0NT3EzT0BIwNvDovQp4rhcs16
3zVwvW+twVsbMuPYTpPVgcynpL6N0K/CoW+ubDGZaRIaf0nDmh4MY1wY/EUsVj8R
FbeTi5L+9MyKvFbtO5d4cW1q7M0XVD3uR8Wle6PwvXZ1gcM59vsR1eml25NLTC8B
Z9F9WKG+dFAni0ll/IL837Se3QQapRXtJQ3g6XbIcpXiMqgIrHZ9FyY0LvuWlQq4
LsIPKh7RySATmAYXwwpsnfdrilvvMHsyjlAoeNHEJBsAUY+kpOIFFi6J5EB+/oyo
jhBhlc4Al0vUXis9jGTysO7mVYVOUQ==
=DTxS
-----END PGP SIGNATURE-----
Merge tag 'aux-sysfs-irqs' of git://git.kernel.org/pub/scm/linux/kernel/git/mellanox/linux
Saeed Mahameed says:
====================
aux-sysfs-irqs
Shay Says:
==========
Introduce auxiliary bus IRQs sysfs
Today, PCI PFs and VFs, which are anchored on the PCI bus, display their
IRQ information in the <pci_device>/msi_irqs/<irq_num> sysfs files. PCI
subfunctions (SFs) are similar to PFs and VFs and these SFs are anchored
on the auxiliary bus. However, these PCI SFs lack such IRQ information
on the auxiliary bus, leaving users without visibility into which IRQs
are used by the SFs. This absence makes it impossible to debug
situations and to understand the source of interrupts/SFs for
performance tuning and debug.
Additionally, the SFs are multifunctional devices supporting RDMA,
network devices, clocks, and more, similar to their peer PCI PFs and
VFs. Therefore, it is desirable to have SFs' IRQ information available
at the bus/device level.
To overcome the above limitations, this short series extends the
auxiliary bus to display IRQ information in sysfs, similar to that of
PFs and VFs.
It adds an 'irqs' directory under the auxiliary device and includes an
<irq_num> sysfs file within it.
For example:
$ ls /sys/bus/auxiliary/devices/mlx5_core.sf.1/irqs/
50 51 52 53 54 55 56 57 58
Patch summary:
patch-1 adds auxiliary bus to support irqs used by auxiliary device
patch-2 mlx5 driver using exposing irqs for PCI SF devices via auxiliary
bus
==========
* tag 'aux-sysfs-irqs' of git://git.kernel.org/pub/scm/linux/kernel/git/mellanox/linux:
net/mlx5: Expose SFs IRQs
driver core: auxiliary bus: show auxiliary device IRQs
RDMA/mlx5: Add Qcounters req_transport_retries_exceeded/req_rnr_retries_exceeded
net/mlx5: Reimplement write combining test
====================
Link: https://patch.msgid.link/20240711213140.256997-1-saeed@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
dd3cd3ca69