From mboxrd@z Thu Jan 1 00:00:00 1970 From: Sergei Shtylyov Subject: Re: [PATCH] igb: add a method to get the nic hw time stamping policy Date: Sat, 11 May 2013 20:51:47 +0400 Message-ID: <518E7723.5010003@cogentembedded.com> References: <20130511140219.GG8399@zhudong.nay.redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: Jeff Kirsher , Jesse Brandeburg , Bruce Allan , Carolyn Wyborny , Don Skidmore , Greg Rose , Peter P Waskiewicz Jr , Alex Duyck , John Ronciak , Tushar Dave , Matthew Vick , Jacob Keller , Richard Cochran , "Paul E. McKenney" , David Howells , Dave Jones , Thomas Gleixner , linux-kernel@vger.kernel.org, e1000-devel@lists.sourceforge.net, netdev@vger.kernel.org To: Dong Zhu Return-path: In-Reply-To: <20130511140219.GG8399@zhudong.nay.redhat.com> Sender: linux-kernel-owner@vger.kernel.org List-Id: netdev.vger.kernel.org Hello. On 11-05-2013 18:02, Dong Zhu wrote: > From e6a55411486de8a09b859e73140bf35c0ee36047 Mon Sep 17 00:00:00 2001 > From: Dong Zhu > Date: Sat, 11 May 2013 21:44:54 +0800 > Subject: [PATCH] igb: add a method to get the nic hw time stamping policy Please, don't send this header with your patches. > Currently kernel only support setting the hw time stamping policy > through ioctl,now add a method to check which packets(Outgoing and > Incoming) are time stamped by nic. > Signed-off-by: Dong Zhu > --- > drivers/net/ethernet/intel/igb/igb_ptp.c | 29 +++++++++++++++++++++++++++++ > include/uapi/linux/net_tstamp.h | 4 +++- > 2 files changed, 32 insertions(+), 1 deletion(-) > diff --git a/drivers/net/ethernet/intel/igb/igb_ptp.c b/drivers/net/ethernet/intel/igb/igb_ptp.c > index 7e8c477..8c06346 100644 > --- a/drivers/net/ethernet/intel/igb/igb_ptp.c > +++ b/drivers/net/ethernet/intel/igb/igb_ptp.c > @@ -577,6 +577,34 @@ int igb_ptp_hwtstamp_ioctl(struct net_device *netdev, > if (config.flags) > return -EINVAL; > > + if (config.rw == 0) > + goto set_policy; > + else if (config.rw == 1) { Both arms of the *if* statement should have {} if one does, according to Documentation/CodingStyle. > + if (config.tx_type || config.rx_filter) > + return -EINVAL; > + > + regval = rd32(E1000_TSYNCTXCTL); > + Empty line not needed here. > + if (regval & E1000_TSYNCTXCTL_ENABLED) > + config.tx_type = HWTSTAMP_TX_ON; > + else > + config.tx_type = HWTSTAMP_TX_OFF; > + > + regval = rd32(E1000_TSYNCRXCTL); > + ... and here. > + if (!(regval & E1000_TSYNCRXCTL_ENABLED)) > + config.rx_filter = HWTSTAMP_FILTER_NONE; > + else if (E1000_TSYNCRXCTL_TYPE_ALL == > + (regval & E1000_TSYNCRXCTL_TYPE_MASK)) > + config.rx_filter = HWTSTAMP_FILTER_ALL; > + else > + return -ERANGE; > + > + goto end; > + } else > + return -EINVAL; Same comment about missing {}. This *if*, however, asks to be converted to *switch*... > diff --git a/include/uapi/linux/net_tstamp.h b/include/uapi/linux/net_tstamp.h > index ae5df12..77147da 100644 > --- a/include/uapi/linux/net_tstamp.h > +++ b/include/uapi/linux/net_tstamp.h > @@ -28,9 +28,10 @@ enum { > /** > * struct hwtstamp_config - %SIOCSHWTSTAMP parameter > * > + * @rw: 0/1 represents set/get the hw time stamp policy > * @flags: no flags defined right now, must be zero > * @tx_type: one of HWTSTAMP_TX_* > - * @rx_type: one of one of HWTSTAMP_FILTER_* > + * @rx_filter: one of one of HWTSTAMP_FILTER_* You don't mention this change in the changelog. Most probably it should be in a separate patch. > @@ -39,6 +40,7 @@ enum { > * 32 and 64 bit systems, don't break this! > */ > struct hwtstamp_config { > + int rw; Why not 'bool'? WBR, Sergei