netdev - [PATCH V4 0/8] ethtool per queue parameters support

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-Id: <1454917540-10648-1-git-send-email-kan.liang@intel.com>
Date:	Mon,  8 Feb 2016 02:45:32 -0500
From:	Kan Liang <kan.liang@...el.com>
To:	netdev@...r.kernel.org, davem@...emloft.net, bwh@...nel.org,
	ben@...adent.org.uk
Cc:	andi@...stfloor.org, jesse.brandeburg@...el.com,
	shannon.nelson@...el.com, f.fainelli@...il.com,
	alexander.duyck@...il.com, jeffrey.t.kirsher@...el.com,
	carolyn.wyborny@...el.com, donald.c.skidmore@...el.com,
	mitch.a.williams@...el.com, ogerlitz@...lanox.com,
	edumazet@...gle.com, jiri@...lanox.com, sfeldma@...il.com,
	gospo@...ulusnetworks.com, sasha.levin@...cle.com,
	dsahern@...il.com, tj@...nel.org, cascardo@...hat.com,
	corbet@....net, decot@...glers.com, Kan Liang <kan.liang@...el.com>
Subject: [PATCH V4 0/8] ethtool per queue parameters support

Modern network interface controllers usually support multiple receive
and transmit queues. Each queue may have its own parameters. For
example, Intel XL710/X710 hardware supports per queue interrupt
moderation. However, current ethtool does not support per queue
parameters option. User has to set parameters for the whole NIC.
This series extends ethtool to support per queue parameters option.

Since the support of per queue parameters vary with different cards,
it is impossible to address all cards in one patch. This series only
supports per queue coalesce options on i40e driver. The framework used
in the patch can be easily extended to other cards and parameters.

The lib bitmap needs to be extended to facilitate exchanging queue bitmaps
between user space and kernel space. Two patches from David's latest V6
patch series are also cited in this series. You may refer to
https://lwn.net/Articles/672517/ for more details.

Changes since V3:
 - Based on David's lib bitmap.
 - ETHTOOL_PERQUEUE should be handled before the containing switch
 - make the rollback code unconditional
 - some minor changes according to Ben's feedback

Changes since V2:
 - Add queue-specific settings for interrupt moderation in i40e

Changes since V1:
 - Checking the sub-command number to determine whether the command
   requires CAP_NET_ADMIN
 - Refine the struct ethtool_per_queue_op and improve the comments
 - Use bitmap functions to parse queue mask
 - Improve comments
 - Use bitmap functions to parse queue mask
 - Improve comments
 - Add rollback support
 - Correct the way to find the vector for specific queue.

David Decotigny (2):
  lib/bitmap.c: conversion routines to/from u32 array
  test_bitmap: unit tests for lib/bitmap.c

Kan Liang (6):
  net/ethtool: introduce a new ioctl for per queue setting
  net/ethtool: support get coalesce per queue
  net/ethtool: support set coalesce per queue
  i40e: queue-specific settings for interrupt moderation
  i40e/ethtool: support coalesce getting by queue
  i40e/ethtool: support coalesce setting by queue

 drivers/net/ethernet/intel/i40e/i40e.h         |   7 --
 drivers/net/ethernet/intel/i40e/i40e_debugfs.c |  15 ++-
 drivers/net/ethernet/intel/i40e/i40e_ethtool.c | 154 +++++++++++++++++--------
 drivers/net/ethernet/intel/i40e/i40e_main.c    |  12 +-
 drivers/net/ethernet/intel/i40e/i40e_txrx.c    |   9 +-
 drivers/net/ethernet/intel/i40e/i40e_txrx.h    |   8 ++
 include/linux/bitmap.h                         |   6 +
 include/linux/ethtool.h                        |  18 ++-
 include/uapi/linux/ethtool.h                   |  17 +++
 lib/Kconfig.debug                              |   8 ++
 lib/Makefile                                   |   1 +
 lib/bitmap.c                                   |  86 ++++++++++++++
 net/core/ethtool.c                             | 119 ++++++++++++++++++-
 tools/testing/selftests/lib/Makefile           |   2 +-
 14 files changed, 389 insertions(+), 73 deletions(-)

-- 
1.8.3.1