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Date: Sat, 17 Mar 2012 13:12:26 +0100 From: Richard Cochran <richardcochran@...il.com> To: <netdev@...r.kernel.org> Cc: David Miller <davem@...emloft.net>, Ben Hutchings <bhutchings@...arflare.com> Subject: [PATCH RFC 0/8] ethtool: support time stamping and phc clocks * Warning - for discussion only, not tested, barely compiled! Support for SO_TIMESTAMPING of network packets and PTP Hardware Clocks has been expanding over the last year or two. In an ideal world, every host would have exactly one PTP hardware clock, and every Ethernet MAC would support SO_TIMESTAMPING on both the transmit and receive paths. However, since we do not yet have full coverage for these features, user space programs need a way to discover what a given interface supports in these two areas: * PTP Hardware Clocks The relationship between the network interfaces and the (possibly multiple) PHC devices is not discoverable except by knowing what hardware you have got and carefully looking into the kernel log. * SO_TIMESTAMPING - Receive software time stamps are implemented in the stack and thus work for all MAC hardware. - Transmit software time stamps are only supported by a dozen drivers or so. - Some special devices support Tx/Rx time stamping in hardware. - None of this is discoverable except by looking into the kernel sources. This series is a draft idea of how to make the hardware and driver capabilities known to user space via ethtool. Since the PHC code was first merged, this has become the number one requested new feature. Patch number 4 applies on top of my recent two igb/phc patches. Thanks in advance for your comments, Richard Richard Cochran (8): phc: Add a method for obtaining the device index. ethtool: Introduce a method for getting time stamping capabilities. bfin_mac: Support the get_ts_info ethtool method. igb: Support the get_ts_info ethtool method. gianfar: Support the get_ts_info ethtool method. ixp4xx_eth: Support the get_ts_info ethtool method. dp83640: Support the get_ts_info ethtool method. davinci_emac: Support the get_ts_info ethtool method. arch/arm/mach-ixp4xx/include/mach/ixp46x_ts.h | 3 ++ drivers/net/ethernet/adi/bfin_mac.c | 20 ++++++++++++ drivers/net/ethernet/freescale/gianfar.h | 3 ++ drivers/net/ethernet/freescale/gianfar_ethtool.c | 29 +++++++++++++++++ drivers/net/ethernet/freescale/gianfar_ptp.c | 2 + drivers/net/ethernet/intel/igb/igb_ethtool.c | 31 +++++++++++++++++++ drivers/net/ethernet/ti/davinci_emac.c | 10 ++++++ drivers/net/ethernet/xscale/ixp4xx_eth.c | 29 +++++++++++++++++ drivers/net/phy/dp83640.c | 31 +++++++++++++++++++ drivers/ptp/ptp_clock.c | 6 ++++ drivers/ptp/ptp_ixp46x.c | 3 ++ include/linux/ethtool.h | 20 ++++++++++++ include/linux/phy.h | 3 ++ include/linux/ptp_clock_kernel.h | 9 +++++ net/core/ethtool.c | 36 ++++++++++++++++++++++ 15 files changed, 235 insertions(+), 0 deletions(-) -- 1.7.2.5 -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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