From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jeff Kirsher Subject: [net-next 08/15] igb: enable internal PPS for the i210 Date: Thu, 22 Jan 2015 18:37:04 -0800 Message-ID: <1421980631-1955-9-git-send-email-jeffrey.t.kirsher@intel.com> References: <1421980631-1955-1-git-send-email-jeffrey.t.kirsher@intel.com> Cc: Richard Cochran , netdev@vger.kernel.org, nhorman@redhat.com, sassmann@redhat.com, jogreene@redhat.com, Jeff Kirsher To: davem@davemloft.net Return-path: Received: from mga14.intel.com ([192.55.52.115]:16347 "EHLO mga14.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752527AbbAWChT (ORCPT ); Thu, 22 Jan 2015 21:37:19 -0500 In-Reply-To: <1421980631-1955-1-git-send-email-jeffrey.t.kirsher@intel.com> Sender: netdev-owner@vger.kernel.org List-ID: From: Richard Cochran The i210 device can produce an interrupt on the full second. This patch allows using this interrupt to generate an internal PPS event for adjusting the kernel system time. Signed-off-by: Richard Cochran Tested-by: Aaron Brown Signed-off-by: Jeff Kirsher --- drivers/net/ethernet/intel/igb/igb_main.c | 18 ++++++++++++++--- drivers/net/ethernet/intel/igb/igb_ptp.c | 32 +++++++++++++++++++++++++++++-- 2 files changed, 45 insertions(+), 5 deletions(-) diff --git a/drivers/net/ethernet/intel/igb/igb_main.c b/drivers/net/ethernet/intel/igb/igb_main.c index 135ac5c..e844162 100644 --- a/drivers/net/ethernet/intel/igb/igb_main.c +++ b/drivers/net/ethernet/intel/igb/igb_main.c @@ -5387,14 +5387,26 @@ void igb_update_stats(struct igb_adapter *adapter, static void igb_tsync_interrupt(struct igb_adapter *adapter) { struct e1000_hw *hw = &adapter->hw; - u32 tsicr = rd32(E1000_TSICR); + struct ptp_clock_event event; + u32 ack = 0, tsicr = rd32(E1000_TSICR); + + if (tsicr & TSINTR_SYS_WRAP) { + event.type = PTP_CLOCK_PPS; + if (adapter->ptp_caps.pps) + ptp_clock_event(adapter->ptp_clock, &event); + else + dev_err(&adapter->pdev->dev, "unexpected SYS WRAP"); + ack |= TSINTR_SYS_WRAP; + } if (tsicr & E1000_TSICR_TXTS) { - /* acknowledge the interrupt */ - wr32(E1000_TSICR, E1000_TSICR_TXTS); /* retrieve hardware timestamp */ schedule_work(&adapter->ptp_tx_work); + ack |= E1000_TSICR_TXTS; } + + /* acknowledge the interrupts */ + wr32(E1000_TSICR, ack); } static irqreturn_t igb_msix_other(int irq, void *data) diff --git a/drivers/net/ethernet/intel/igb/igb_ptp.c b/drivers/net/ethernet/intel/igb/igb_ptp.c index 8389bb4..98c58d9 100644 --- a/drivers/net/ethernet/intel/igb/igb_ptp.c +++ b/drivers/net/ethernet/intel/igb/igb_ptp.c @@ -355,6 +355,34 @@ static int igb_ptp_settime_i210(struct ptp_clock_info *ptp, return 0; } +static int igb_ptp_feature_enable_i210(struct ptp_clock_info *ptp, + struct ptp_clock_request *rq, int on) +{ + struct igb_adapter *igb = + container_of(ptp, struct igb_adapter, ptp_caps); + struct e1000_hw *hw = &igb->hw; + unsigned long flags; + u32 tsim; + + switch (rq->type) { + case PTP_CLK_REQ_PPS: + spin_lock_irqsave(&igb->tmreg_lock, flags); + tsim = rd32(E1000_TSIM); + if (on) + tsim |= TSINTR_SYS_WRAP; + else + tsim &= ~TSINTR_SYS_WRAP; + wr32(E1000_TSIM, tsim); + spin_unlock_irqrestore(&igb->tmreg_lock, flags); + return 0; + + default: + break; + } + + return -EOPNOTSUPP; +} + static int igb_ptp_feature_enable(struct ptp_clock_info *ptp, struct ptp_clock_request *rq, int on) { @@ -797,12 +825,12 @@ void igb_ptp_init(struct igb_adapter *adapter) adapter->ptp_caps.owner = THIS_MODULE; adapter->ptp_caps.max_adj = 62499999; adapter->ptp_caps.n_ext_ts = 0; - adapter->ptp_caps.pps = 0; + adapter->ptp_caps.pps = 1; adapter->ptp_caps.adjfreq = igb_ptp_adjfreq_82580; adapter->ptp_caps.adjtime = igb_ptp_adjtime_i210; adapter->ptp_caps.gettime = igb_ptp_gettime_i210; adapter->ptp_caps.settime = igb_ptp_settime_i210; - adapter->ptp_caps.enable = igb_ptp_feature_enable; + adapter->ptp_caps.enable = igb_ptp_feature_enable_i210; /* Enable the timer functions by clearing bit 31. */ wr32(E1000_TSAUXC, 0x0); break; -- 1.9.3