linux-kernel - [PATCH v2 0/2] Enable read timeout specification for sbefifo read

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Message-Id: <20211216062405.415888-1-amitay@ozlabs.org>
Date:   Thu, 16 Dec 2021 17:24:03 +1100
From:   Amitay Isaacs <amitay@...abs.org>
To:     linux-kernel@...r.kernel.org, linux-fsi@...ts.ozlabs.org,
        jk@...abs.org, joel@....id.au, alistair@...ple.id.au,
        eajames@...ux.ibm.com
Cc:     Amitay Isaacs <amitay@...abs.org>
Subject: [PATCH v2 0/2] Enable read timeout specification for sbefifo read

Certain SBE operations (e.g. collecting trace information from processors)
can take long time (> 10 seconds) to finish before SBE can respond.
Such operations will currentlly timeout due to the default response
timeout of 10 seconds.  This patchset allows users to set a longer timeout
using ioctl on the sbefifo device fd, before issuing SBE operations that
are likely to take longer.

v2 changes:
  - uint32 --> u32
  - Avoid resetting the read timeout after single operation.  Use ioctl
    to set the read timeout per open fd for sbefifo device.
  - Specifying 0 value to ioctl will reset the timeout to default value
  - Document ioctl behaviour in uapi/linux/fsi.h


Amitay Isaacs (2):
  fsi: sbefifo: Use specified value of start of response timeout
  fsi: sbefifo: implement FSI_SBEFIFO_READ_TIMEOUT ioctl

 drivers/fsi/fsi-sbefifo.c | 48 ++++++++++++++++++++++++++++++++++++++-
 include/uapi/linux/fsi.h  | 14 ++++++++++++
 2 files changed, 61 insertions(+), 1 deletion(-)

-- 
2.33.1