diff options
Diffstat (limited to 'drivers/net/ethernet/intel/ixgbe/ixgbe_ptp.c')
| -rw-r--r-- | drivers/net/ethernet/intel/ixgbe/ixgbe_ptp.c | 164 |
1 files changed, 65 insertions, 99 deletions
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_ptp.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_ptp.c index d929131..1a751c9 100644 --- a/drivers/net/ethernet/intel/ixgbe/ixgbe_ptp.c +++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_ptp.c @@ -387,6 +387,15 @@ void ixgbe_ptp_check_pps_event(struct ixgbe_adapter *adapter, u32 eicr) struct ixgbe_hw *hw = &adapter->hw; struct ptp_clock_event event; + event.type = PTP_CLOCK_PPS; + + /* this check is necessary in case the interrupt was enabled via some + * alternative means (ex. debug_fs). Better to check here than + * everywhere that calls this function. + */ + if (!adapter->ptp_clock) + return; + switch (hw->mac.type) { case ixgbe_mac_X540: ptp_clock_event(adapter->ptp_clock, &event); @@ -411,7 +420,7 @@ void ixgbe_ptp_overflow_check(struct ixgbe_adapter *adapter) unsigned long elapsed_jiffies = adapter->last_overflow_check - jiffies; struct timespec ts; - if ((adapter->flags2 & IXGBE_FLAG2_OVERFLOW_CHECK_ENABLED) && + if ((adapter->flags2 & IXGBE_FLAG2_PTP_ENABLED) && (elapsed_jiffies >= IXGBE_OVERFLOW_PERIOD)) { ixgbe_ptp_gettime(&adapter->ptp_caps, &ts); adapter->last_overflow_check = jiffies; @@ -554,12 +563,14 @@ void ixgbe_ptp_rx_hwtstamp(struct ixgbe_q_vector *q_vector, adapter = q_vector->adapter; hw = &adapter->hw; + if (likely(!ixgbe_ptp_match(skb, adapter->rx_hwtstamp_filter))) + return; + tsyncrxctl = IXGBE_READ_REG(hw, IXGBE_TSYNCRXCTL); /* Check if we have a valid timestamp and make sure the skb should * have been timestamped */ - if (likely(!(tsyncrxctl & IXGBE_TSYNCRXCTL_VALID) || - !ixgbe_ptp_match(skb, adapter->rx_hwtstamp_filter))) + if (!(tsyncrxctl & IXGBE_TSYNCRXCTL_VALID)) return; /* @@ -622,8 +633,7 @@ int ixgbe_ptp_hwtstamp_ioctl(struct ixgbe_adapter *adapter, struct hwtstamp_config config; u32 tsync_tx_ctl = IXGBE_TSYNCTXCTL_ENABLED; u32 tsync_rx_ctl = IXGBE_TSYNCRXCTL_ENABLED; - u32 tsync_rx_mtrl = 0; - bool is_l4 = false; + u32 tsync_rx_mtrl = PTP_EV_PORT << 16; bool is_l2 = false; u32 regval; @@ -646,16 +656,15 @@ int ixgbe_ptp_hwtstamp_ioctl(struct ixgbe_adapter *adapter, switch (config.rx_filter) { case HWTSTAMP_FILTER_NONE: tsync_rx_ctl = 0; + tsync_rx_mtrl = 0; break; case HWTSTAMP_FILTER_PTP_V1_L4_SYNC: tsync_rx_ctl |= IXGBE_TSYNCRXCTL_TYPE_L4_V1; tsync_rx_mtrl = IXGBE_RXMTRL_V1_SYNC_MSG; - is_l4 = true; break; case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ: tsync_rx_ctl |= IXGBE_TSYNCRXCTL_TYPE_L4_V1; tsync_rx_mtrl = IXGBE_RXMTRL_V1_DELAY_REQ_MSG; - is_l4 = true; break; case HWTSTAMP_FILTER_PTP_V2_EVENT: case HWTSTAMP_FILTER_PTP_V2_L2_EVENT: @@ -668,7 +677,6 @@ int ixgbe_ptp_hwtstamp_ioctl(struct ixgbe_adapter *adapter, case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ: tsync_rx_ctl |= IXGBE_TSYNCRXCTL_TYPE_EVENT_V2; is_l2 = true; - is_l4 = true; config.rx_filter = HWTSTAMP_FILTER_PTP_V2_EVENT; break; case HWTSTAMP_FILTER_PTP_V1_L4_EVENT: @@ -693,42 +701,15 @@ int ixgbe_ptp_hwtstamp_ioctl(struct ixgbe_adapter *adapter, /* Store filter value for later use */ adapter->rx_hwtstamp_filter = config.rx_filter; - /* define ethertype filter for timestamped packets */ + /* define ethertype filter for timestamping L2 packets */ if (is_l2) - IXGBE_WRITE_REG(hw, IXGBE_ETQF(3), + IXGBE_WRITE_REG(hw, IXGBE_ETQF(IXGBE_ETQF_FILTER_1588), (IXGBE_ETQF_FILTER_EN | /* enable filter */ IXGBE_ETQF_1588 | /* enable timestamping */ ETH_P_1588)); /* 1588 eth protocol type */ else - IXGBE_WRITE_REG(hw, IXGBE_ETQF(3), 0); - -#define PTP_PORT 319 - /* L4 Queue Filter[3]: filter by destination port and protocol */ - if (is_l4) { - u32 ftqf = (IXGBE_FTQF_PROTOCOL_UDP /* UDP */ - | IXGBE_FTQF_POOL_MASK_EN /* Pool not compared */ - | IXGBE_FTQF_QUEUE_ENABLE); - - ftqf |= ((IXGBE_FTQF_PROTOCOL_COMP_MASK /* protocol check */ - & IXGBE_FTQF_DEST_PORT_MASK /* dest check */ - & IXGBE_FTQF_SOURCE_PORT_MASK) /* source check */ - << IXGBE_FTQF_5TUPLE_MASK_SHIFT); + IXGBE_WRITE_REG(hw, IXGBE_ETQF(IXGBE_ETQF_FILTER_1588), 0); - IXGBE_WRITE_REG(hw, IXGBE_L34T_IMIR(3), - (3 << IXGBE_IMIR_RX_QUEUE_SHIFT_82599 | - IXGBE_IMIR_SIZE_BP_82599)); - - /* enable port check */ - IXGBE_WRITE_REG(hw, IXGBE_SDPQF(3), - (htons(PTP_PORT) | - htons(PTP_PORT) << 16)); - - IXGBE_WRITE_REG(hw, IXGBE_FTQF(3), ftqf); - - tsync_rx_mtrl |= PTP_PORT << 16; - } else { - IXGBE_WRITE_REG(hw, IXGBE_FTQF(3), 0); - } /* enable/disable TX */ regval = IXGBE_READ_REG(hw, IXGBE_TSYNCTXCTL); @@ -759,58 +740,20 @@ int ixgbe_ptp_hwtstamp_ioctl(struct ixgbe_adapter *adapter, * ixgbe_ptp_start_cyclecounter - create the cycle counter from hw * @adapter: pointer to the adapter structure * - * this function initializes the timecounter and cyclecounter - * structures for use in generated a ns counter from the arbitrary - * fixed point cycles registers in the hardware. - * - * A change in link speed impacts the frequency of the DMA clock on - * the device, which is used to generate the cycle counter - * registers. Therefor this function is called whenever the link speed - * changes. - * - * This function also turns on the SDP pin for clock out feature (X540 - * only), because this is where the shift is first calculated. + * This function should be called to set the proper values for the TIMINCA + * register and tell the cyclecounter structure what the tick rate of SYSTIME + * is. It does not directly modify SYSTIME registers or the timecounter + * structure. It should be called whenever a new TIMINCA value is necessary, + * such as during initialization or when the link speed changes. */ void ixgbe_ptp_start_cyclecounter(struct ixgbe_adapter *adapter) { struct ixgbe_hw *hw = &adapter->hw; u32 incval = 0; - u32 timinca = 0; u32 shift = 0; - u32 cycle_speed; unsigned long flags; /** - * Determine what speed we need to set the cyclecounter - * for. It should be different for 100Mb, 1Gb, and 10Gb. Treat - * unknown speeds as 10Gb. (Hence why we can't just copy the - * link_speed. - */ - switch (adapter->link_speed) { - case IXGBE_LINK_SPEED_100_FULL: - case IXGBE_LINK_SPEED_1GB_FULL: - case IXGBE_LINK_SPEED_10GB_FULL: - cycle_speed = adapter->link_speed; - break; - default: - /* cycle speed should be 10Gb when there is no link */ - cycle_speed = IXGBE_LINK_SPEED_10GB_FULL; - break; - } - - /* - * grab the current TIMINCA value from the register so that it can be - * double checked. If the register value has been cleared, it must be - * reset to the correct value for generating a cyclecounter. If - * TIMINCA is zero, the SYSTIME registers do not increment at all. - */ - timinca = IXGBE_READ_REG(hw, IXGBE_TIMINCA); - - /* Bail if the cycle speed didn't change and TIMINCA is non-zero */ - if (adapter->cycle_speed == cycle_speed && timinca) - return; - - /** * Scale the NIC cycle counter by a large factor so that * relatively small corrections to the frequency can be added * or subtracted. The drawbacks of a large factor include @@ -819,8 +762,12 @@ void ixgbe_ptp_start_cyclecounter(struct ixgbe_adapter *adapter) * to nanoseconds using only a multiplier and a right-shift, * and (c) the value must fit within the timinca register space * => math based on internal DMA clock rate and available bits + * + * Note that when there is no link, internal DMA clock is same as when + * link speed is 10Gb. Set the registers correctly even when link is + * down to preserve the clock setting */ - switch (cycle_speed) { + switch (adapter->link_speed) { case IXGBE_LINK_SPEED_100_FULL: incval = IXGBE_INCVAL_100; shift = IXGBE_INCVAL_SHIFT_100; @@ -830,6 +777,7 @@ void ixgbe_ptp_start_cyclecounter(struct ixgbe_adapter *adapter) shift = IXGBE_INCVAL_SHIFT_1GB; break; case IXGBE_LINK_SPEED_10GB_FULL: + default: incval = IXGBE_INCVAL_10GB; shift = IXGBE_INCVAL_SHIFT_10GB; break; @@ -857,18 +805,11 @@ void ixgbe_ptp_start_cyclecounter(struct ixgbe_adapter *adapter) return; } - /* reset the system time registers */ - IXGBE_WRITE_REG(hw, IXGBE_SYSTIML, 0x00000000); - IXGBE_WRITE_REG(hw, IXGBE_SYSTIMH, 0x00000000); - IXGBE_WRITE_FLUSH(hw); - - /* store the new cycle speed */ - adapter->cycle_speed = cycle_speed; - + /* update the base incval used to calculate frequency adjustment */ ACCESS_ONCE(adapter->base_incval) = incval; smp_mb(); - /* grab the ptp lock */ + /* need lock to prevent incorrect read while modifying cyclecounter */ spin_lock_irqsave(&adapter->tmreg_lock, flags); memset(&adapter->cc, 0, sizeof(adapter->cc)); @@ -877,6 +818,31 @@ void ixgbe_ptp_start_cyclecounter(struct ixgbe_adapter *adapter) adapter->cc.shift = shift; adapter->cc.mult = 1; + spin_unlock_irqrestore(&adapter->tmreg_lock, flags); +} + +/** + * ixgbe_ptp_reset + * @adapter: the ixgbe private board structure + * + * When the MAC resets, all timesync features are reset. This function should be + * called to re-enable the PTP clock structure. It will re-init the timecounter + * structure based on the kernel time as well as setup the cycle counter data. + */ +void ixgbe_ptp_reset(struct ixgbe_adapter *adapter) +{ + struct ixgbe_hw *hw = &adapter->hw; + unsigned long flags; + + /* set SYSTIME registers to 0 just in case */ + IXGBE_WRITE_REG(hw, IXGBE_SYSTIML, 0x00000000); + IXGBE_WRITE_REG(hw, IXGBE_SYSTIMH, 0x00000000); + IXGBE_WRITE_FLUSH(hw); + + ixgbe_ptp_start_cyclecounter(adapter); + + spin_lock_irqsave(&adapter->tmreg_lock, flags); + /* reset the ns time counter */ timecounter_init(&adapter->tc, &adapter->cc, ktime_to_ns(ktime_get_real())); @@ -904,7 +870,7 @@ void ixgbe_ptp_init(struct ixgbe_adapter *adapter) switch (adapter->hw.mac.type) { case ixgbe_mac_X540: - snprintf(adapter->ptp_caps.name, 16, "%pm", netdev->dev_addr); + snprintf(adapter->ptp_caps.name, 16, "%s", netdev->name); adapter->ptp_caps.owner = THIS_MODULE; adapter->ptp_caps.max_adj = 250000000; adapter->ptp_caps.n_alarm = 0; @@ -918,7 +884,7 @@ void ixgbe_ptp_init(struct ixgbe_adapter *adapter) adapter->ptp_caps.enable = ixgbe_ptp_enable; break; case ixgbe_mac_82599EB: - snprintf(adapter->ptp_caps.name, 16, "%pm", netdev->dev_addr); + snprintf(adapter->ptp_caps.name, 16, "%s", netdev->name); adapter->ptp_caps.owner = THIS_MODULE; adapter->ptp_caps.max_adj = 250000000; adapter->ptp_caps.n_alarm = 0; @@ -942,11 +908,6 @@ void ixgbe_ptp_init(struct ixgbe_adapter *adapter) spin_lock_init(&adapter->tmreg_lock); - ixgbe_ptp_start_cyclecounter(adapter); - - /* (Re)start the overflow check */ - adapter->flags2 |= IXGBE_FLAG2_OVERFLOW_CHECK_ENABLED; - adapter->ptp_clock = ptp_clock_register(&adapter->ptp_caps, &adapter->pdev->dev); if (IS_ERR(adapter->ptp_clock)) { @@ -955,6 +916,11 @@ void ixgbe_ptp_init(struct ixgbe_adapter *adapter) } else e_dev_info("registered PHC device on %s\n", netdev->name); + ixgbe_ptp_reset(adapter); + + /* set the flag that PTP has been enabled */ + adapter->flags2 |= IXGBE_FLAG2_PTP_ENABLED; + return; } @@ -967,7 +933,7 @@ void ixgbe_ptp_init(struct ixgbe_adapter *adapter) void ixgbe_ptp_stop(struct ixgbe_adapter *adapter) { /* stop the overflow check task */ - adapter->flags2 &= ~(IXGBE_FLAG2_OVERFLOW_CHECK_ENABLED | + adapter->flags2 &= ~(IXGBE_FLAG2_PTP_ENABLED | IXGBE_FLAG2_PTP_PPS_ENABLED); ixgbe_ptp_setup_sdp(adapter); |
