From mboxrd@z Thu Jan 1 00:00:00 1970 From: kan.liang@intel.com Subject: [RFC V3 PATCH 07/26] net/netpolicy: enable and disable NET policy Date: Mon, 12 Sep 2016 07:55:40 -0700 Message-ID: <1473692159-4017-8-git-send-email-kan.liang@intel.com> References: <1473692159-4017-1-git-send-email-kan.liang@intel.com> Cc: jeffrey.t.kirsher@intel.com, mingo@redhat.com, peterz@infradead.org, kuznet@ms2.inr.ac.ru, jmorris@namei.org, yoshfuji@linux-ipv6.org, kaber@trash.net, akpm@linux-foundation.org, keescook@chromium.org, viro@zeniv.linux.org.uk, gorcunov@openvz.org, john.stultz@linaro.org, aduyck@mirantis.com, ben@decadent.org.uk, decot@googlers.com, fw@strlen.de, alexander.duyck@gmail.com, daniel@iogearbox.net, tom@herbertland.com, rdunlap@infradead.org, xiyou.wangcong@gmail.com, hannes@stressinduktion.org, stephen@networkplumber.org, alexei.starovoitov@gmail.com, jesse.brandeburg@intel.com, andi@firstfloor.org, Kan Liang To: davem@davemloft.net, linux-kernel@vger.kernel.org, netdev@vger.kernel.org Return-path: In-Reply-To: <1473692159-4017-1-git-send-email-kan.liang@intel.com> Sender: linux-kernel-owner@vger.kernel.org List-Id: netdev.vger.kernel.org From: Kan Liang This patch introduces functions to enable and disable NET policy. For enabling, it collects device and CPU information and setup CPU/queue mapping. Also, for some drivers like i40e driver, it will get better performance if setting IRQ affinity. This patch provides an option irq_affinity for driver to set IRQ affinity in NET policy enabling. For disabling, it removes the IRQ affinity (if set) and mapping information. np_lock should protect the enable and disable state. It will be done later in this series. Signed-off-by: Kan Liang --- include/linux/netpolicy.h | 1 + net/core/netpolicy.c | 41 +++++++++++++++++++++++++++++++++++++++++ 2 files changed, 42 insertions(+) diff --git a/include/linux/netpolicy.h b/include/linux/netpolicy.h index a946b75c..bfab7b8 100644 --- a/include/linux/netpolicy.h +++ b/include/linux/netpolicy.h @@ -49,6 +49,7 @@ struct netpolicy_sys_info { struct netpolicy_info { enum netpolicy_name cur_policy; unsigned long avail_policy[BITS_TO_LONGS(NET_POLICY_MAX)]; + bool irq_affinity; /* cpu and queue mapping information */ struct netpolicy_sys_info sys_info; }; diff --git a/net/core/netpolicy.c b/net/core/netpolicy.c index adcb5e3..a6e240f 100644 --- a/net/core/netpolicy.c +++ b/net/core/netpolicy.c @@ -162,6 +162,47 @@ static void netpolicy_set_affinity(struct net_device *dev) } } +static int netpolicy_disable(struct net_device *dev) +{ + if (dev->netpolicy->irq_affinity) + netpolicy_clear_affinity(dev); + netpolicy_free_sys_map(dev); + + return 0; +} + +static int netpolicy_enable(struct net_device *dev) +{ + int ret; + struct netpolicy_dev_info d_info; + u32 cpu; + + if (WARN_ON(!dev->netpolicy)) + return -EINVAL; + + /* get driver information */ + ret = netpolicy_get_dev_info(dev, &d_info); + if (ret) + return ret; + + /* get cpu information */ + cpu = netpolicy_get_cpu_information(); + + /* create sys map */ + ret = netpolicy_update_sys_map(dev, &d_info, cpu); + if (ret) { + netpolicy_free_dev_info(&d_info); + return ret; + } + + /* set irq affinity */ + if (dev->netpolicy->irq_affinity) + netpolicy_set_affinity(dev); + + netpolicy_free_dev_info(&d_info); + return 0; +} + const char *policy_name[NET_POLICY_MAX] = { "NONE" }; -- 2.5.5