diff options
Diffstat (limited to 'drivers/net/ethernet/intel/igb/igb_ptp.c')
| -rw-r--r-- | drivers/net/ethernet/intel/igb/igb_ptp.c | 238 |
1 files changed, 164 insertions, 74 deletions
diff --git a/drivers/net/ethernet/intel/igb/igb_ptp.c b/drivers/net/ethernet/intel/igb/igb_ptp.c index ab3429729bd..794c139f0cc 100644 --- a/drivers/net/ethernet/intel/igb/igb_ptp.c +++ b/drivers/net/ethernet/intel/igb/igb_ptp.c @@ -1,5 +1,4 @@ -/* - * PTP Hardware Clock (PHC) driver for the Intel 82576 and 82580 +/* PTP Hardware Clock (PHC) driver for the Intel 82576 and 82580 * * Copyright (C) 2011 Richard Cochran <richardcochran@gmail.com> * @@ -13,21 +12,20 @@ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * - * You should have received a copy of the GNU General Public License along - * with this program; if not, write to the Free Software Foundation, Inc., - * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + * You should have received a copy of the GNU General Public License along with + * this program; if not, see <http://www.gnu.org/licenses/>. */ #include <linux/module.h> #include <linux/device.h> #include <linux/pci.h> +#include <linux/ptp_classify.h> #include "igb.h" #define INCVALUE_MASK 0x7fffffff #define ISGN 0x80000000 -/* - * The 82580 timesync updates the system timer every 8ns by 8ns, +/* The 82580 timesync updates the system timer every 8ns by 8ns, * and this update value cannot be reprogrammed. * * Neither the 82576 nor the 82580 offer registers wide enough to hold @@ -70,15 +68,15 @@ */ #define IGB_SYSTIM_OVERFLOW_PERIOD (HZ * 60 * 9) +#define IGB_PTP_TX_TIMEOUT (HZ * 15) #define INCPERIOD_82576 (1 << E1000_TIMINCA_16NS_SHIFT) #define INCVALUE_82576_MASK ((1 << E1000_TIMINCA_16NS_SHIFT) - 1) #define INCVALUE_82576 (16 << IGB_82576_TSYNC_SHIFT) #define IGB_NBITS_82580 40 -/* - * SYSTIM read access for the 82576 - */ +static void igb_ptp_tx_hwtstamp(struct igb_adapter *adapter); +/* SYSTIM read access for the 82576 */ static cycle_t igb_ptp_read_82576(const struct cyclecounter *cc) { struct igb_adapter *igb = container_of(cc, struct igb_adapter, cc); @@ -95,23 +93,19 @@ static cycle_t igb_ptp_read_82576(const struct cyclecounter *cc) return val; } -/* - * SYSTIM read access for the 82580 - */ - +/* SYSTIM read access for the 82580 */ static cycle_t igb_ptp_read_82580(const struct cyclecounter *cc) { struct igb_adapter *igb = container_of(cc, struct igb_adapter, cc); struct e1000_hw *hw = &igb->hw; + u32 lo, hi; u64 val; - u32 lo, hi, jk; - /* - * The timestamp latches on lowest register read. For the 82580 + /* The timestamp latches on lowest register read. For the 82580 * the lowest register is SYSTIMR instead of SYSTIML. However we only * need to provide nanosecond resolution, so we just ignore it. */ - jk = rd32(E1000_SYSTIMR); + rd32(E1000_SYSTIMR); lo = rd32(E1000_SYSTIML); hi = rd32(E1000_SYSTIMH); @@ -121,21 +115,17 @@ static cycle_t igb_ptp_read_82580(const struct cyclecounter *cc) return val; } -/* - * SYSTIM read access for I210/I211 - */ - +/* SYSTIM read access for I210/I211 */ static void igb_ptp_read_i210(struct igb_adapter *adapter, struct timespec *ts) { struct e1000_hw *hw = &adapter->hw; - u32 sec, nsec, jk; + u32 sec, nsec; - /* - * The timestamp latches on lowest register read. For I210/I211, the + /* The timestamp latches on lowest register read. For I210/I211, the * lowest register is SYSTIMR. Since we only need to provide nanosecond * resolution, we can ignore it. */ - jk = rd32(E1000_SYSTIMR); + rd32(E1000_SYSTIMR); nsec = rd32(E1000_SYSTIML); sec = rd32(E1000_SYSTIMH); @@ -148,8 +138,7 @@ static void igb_ptp_write_i210(struct igb_adapter *adapter, { struct e1000_hw *hw = &adapter->hw; - /* - * Writing the SYSTIMR register is not necessary as it only provides + /* Writing the SYSTIMR register is not necessary as it only provides * sub-nanosecond resolution. */ wr32(E1000_SYSTIML, ts->tv_nsec); @@ -183,6 +172,7 @@ static void igb_ptp_systim_to_hwtstamp(struct igb_adapter *adapter, switch (adapter->hw.mac.type) { case e1000_82576: case e1000_82580: + case e1000_i354: case e1000_i350: spin_lock_irqsave(&adapter->tmreg_lock, flags); @@ -205,10 +195,7 @@ static void igb_ptp_systim_to_hwtstamp(struct igb_adapter *adapter, } } -/* - * PTP clock operations - */ - +/* PTP clock operations */ static int igb_ptp_adjfreq_82576(struct ptp_clock_info *ptp, s32 ppb) { struct igb_adapter *igb = container_of(ptp, struct igb_adapter, @@ -373,8 +360,8 @@ static int igb_ptp_settime_i210(struct ptp_clock_info *ptp, return 0; } -static int igb_ptp_enable(struct ptp_clock_info *ptp, - struct ptp_clock_request *rq, int on) +static int igb_ptp_feature_enable(struct ptp_clock_info *ptp, + struct ptp_clock_request *rq, int on) { return -EOPNOTSUPP; } @@ -385,8 +372,8 @@ static int igb_ptp_enable(struct ptp_clock_info *ptp, * * This work function polls the TSYNCTXCTL valid bit to determine when a * timestamp has been taken for the current stored skb. - */ -void igb_ptp_tx_work(struct work_struct *work) + **/ +static void igb_ptp_tx_work(struct work_struct *work) { struct igb_adapter *adapter = container_of(work, struct igb_adapter, ptp_tx_work); @@ -396,6 +383,16 @@ void igb_ptp_tx_work(struct work_struct *work) if (!adapter->ptp_tx_skb) return; + if (time_is_before_jiffies(adapter->ptp_tx_start + + IGB_PTP_TX_TIMEOUT)) { + dev_kfree_skb_any(adapter->ptp_tx_skb); + adapter->ptp_tx_skb = NULL; + clear_bit_unlock(__IGB_PTP_TX_IN_PROGRESS, &adapter->state); + adapter->tx_hwtstamp_timeouts++; + dev_warn(&adapter->pdev->dev, "clearing Tx timestamp hang\n"); + return; + } + tsynctxctl = rd32(E1000_TSYNCTXCTL); if (tsynctxctl & E1000_TSYNCTXCTL_VALID) igb_ptp_tx_hwtstamp(adapter); @@ -419,14 +416,54 @@ static void igb_ptp_overflow_check(struct work_struct *work) } /** + * igb_ptp_rx_hang - detect error case when Rx timestamp registers latched + * @adapter: private network adapter structure + * + * This watchdog task is scheduled to detect error case where hardware has + * dropped an Rx packet that was timestamped when the ring is full. The + * particular error is rare but leaves the device in a state unable to timestamp + * any future packets. + **/ +void igb_ptp_rx_hang(struct igb_adapter *adapter) +{ + struct e1000_hw *hw = &adapter->hw; + u32 tsyncrxctl = rd32(E1000_TSYNCRXCTL); + unsigned long rx_event; + + if (hw->mac.type != e1000_82576) + return; + + /* If we don't have a valid timestamp in the registers, just update the + * timeout counter and exit + */ + if (!(tsyncrxctl & E1000_TSYNCRXCTL_VALID)) { + adapter->last_rx_ptp_check = jiffies; + return; + } + + /* Determine the most recent watchdog or rx_timestamp event */ + rx_event = adapter->last_rx_ptp_check; + if (time_after(adapter->last_rx_timestamp, rx_event)) + rx_event = adapter->last_rx_timestamp; + + /* Only need to read the high RXSTMP register to clear the lock */ + if (time_is_before_jiffies(rx_event + 5 * HZ)) { + rd32(E1000_RXSTMPH); + adapter->last_rx_ptp_check = jiffies; + adapter->rx_hwtstamp_cleared++; + dev_warn(&adapter->pdev->dev, "clearing Rx timestamp hang\n"); + } +} + +/** * igb_ptp_tx_hwtstamp - utility function which checks for TX time stamp * @adapter: Board private structure. * * If we were asked to do hardware stamping and such a time stamp is * available, then it must have been for this skb here because we only * allow only one such packet into the queue. - */ -void igb_ptp_tx_hwtstamp(struct igb_adapter *adapter) + **/ +static void igb_ptp_tx_hwtstamp(struct igb_adapter *adapter) { struct e1000_hw *hw = &adapter->hw; struct skb_shared_hwtstamps shhwtstamps; @@ -439,6 +476,7 @@ void igb_ptp_tx_hwtstamp(struct igb_adapter *adapter) skb_tstamp_tx(adapter->ptp_tx_skb, &shhwtstamps); dev_kfree_skb_any(adapter->ptp_tx_skb); adapter->ptp_tx_skb = NULL; + clear_bit_unlock(__IGB_PTP_TX_IN_PROGRESS, &adapter->state); } /** @@ -450,15 +488,14 @@ void igb_ptp_tx_hwtstamp(struct igb_adapter *adapter) * This function is meant to retrieve a timestamp from the first buffer of an * incoming frame. The value is stored in little endian format starting on * byte 8. - */ + **/ void igb_ptp_rx_pktstamp(struct igb_q_vector *q_vector, unsigned char *va, struct sk_buff *skb) { __le64 *regval = (__le64 *)va; - /* - * The timestamp is recorded in little endian format. + /* The timestamp is recorded in little endian format. * DWORD: 0 1 2 3 * Field: Reserved Reserved SYSTIML SYSTIMH */ @@ -473,7 +510,7 @@ void igb_ptp_rx_pktstamp(struct igb_q_vector *q_vector, * * This function is meant to retrieve a timestamp from the internal registers * of the adapter and store it in the skb. - */ + **/ void igb_ptp_rx_rgtstamp(struct igb_q_vector *q_vector, struct sk_buff *skb) { @@ -481,8 +518,7 @@ void igb_ptp_rx_rgtstamp(struct igb_q_vector *q_vector, struct e1000_hw *hw = &adapter->hw; u64 regval; - /* - * If this bit is set, then the RX registers contain the time stamp. No + /* If this bit is set, then the RX registers contain the time stamp. No * other packet will be time stamped until we read these registers, so * read the registers to make them available again. Because only one * packet can be time stamped at a time, we know that the register @@ -499,13 +535,35 @@ void igb_ptp_rx_rgtstamp(struct igb_q_vector *q_vector, regval |= (u64)rd32(E1000_RXSTMPH) << 32; igb_ptp_systim_to_hwtstamp(adapter, skb_hwtstamps(skb), regval); + + /* Update the last_rx_timestamp timer in order to enable watchdog check + * for error case of latched timestamp on a dropped packet. + */ + adapter->last_rx_timestamp = jiffies; } /** - * igb_ptp_hwtstamp_ioctl - control hardware time stamping + * igb_ptp_get_ts_config - get hardware time stamping config * @netdev: * @ifreq: - * @cmd: + * + * Get the hwtstamp_config settings to return to the user. Rather than attempt + * to deconstruct the settings from the registers, just return a shadow copy + * of the last known settings. + **/ +int igb_ptp_get_ts_config(struct net_device *netdev, struct ifreq *ifr) +{ + struct igb_adapter *adapter = netdev_priv(netdev); + struct hwtstamp_config *config = &adapter->tstamp_config; + + return copy_to_user(ifr->ifr_data, config, sizeof(*config)) ? + -EFAULT : 0; +} + +/** + * igb_ptp_set_timestamp_mode - setup hardware for timestamping + * @adapter: networking device structure + * @config: hwtstamp configuration * * Outgoing time stamping can be enabled and disabled. Play nice and * disable it when requested, although it shouldn't case any overhead @@ -518,14 +576,11 @@ void igb_ptp_rx_rgtstamp(struct igb_q_vector *q_vector, * type has to be specified. Matching the kind of event packet is * not supported, with the exception of "all V2 events regardless of * level 2 or 4". - * - **/ -int igb_ptp_hwtstamp_ioctl(struct net_device *netdev, - struct ifreq *ifr, int cmd) + */ +static int igb_ptp_set_timestamp_mode(struct igb_adapter *adapter, + struct hwtstamp_config *config) { - struct igb_adapter *adapter = netdev_priv(netdev); struct e1000_hw *hw = &adapter->hw; - struct hwtstamp_config config; u32 tsync_tx_ctl = E1000_TSYNCTXCTL_ENABLED; u32 tsync_rx_ctl = E1000_TSYNCRXCTL_ENABLED; u32 tsync_rx_cfg = 0; @@ -533,14 +588,11 @@ int igb_ptp_hwtstamp_ioctl(struct net_device *netdev, bool is_l2 = false; u32 regval; - if (copy_from_user(&config, ifr->ifr_data, sizeof(config))) - return -EFAULT; - /* reserved for future extensions */ - if (config.flags) + if (config->flags) return -EINVAL; - switch (config.tx_type) { + switch (config->tx_type) { case HWTSTAMP_TX_OFF: tsync_tx_ctl = 0; case HWTSTAMP_TX_ON: @@ -549,7 +601,7 @@ int igb_ptp_hwtstamp_ioctl(struct net_device *netdev, return -ERANGE; } - switch (config.rx_filter) { + switch (config->rx_filter) { case HWTSTAMP_FILTER_NONE: tsync_rx_ctl = 0; break; @@ -573,7 +625,7 @@ int igb_ptp_hwtstamp_ioctl(struct net_device *netdev, case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ: case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ: tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_EVENT_V2; - config.rx_filter = HWTSTAMP_FILTER_PTP_V2_EVENT; + config->rx_filter = HWTSTAMP_FILTER_PTP_V2_EVENT; is_l2 = true; is_l4 = true; break; @@ -584,12 +636,12 @@ int igb_ptp_hwtstamp_ioctl(struct net_device *netdev, */ if (hw->mac.type != e1000_82576) { tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_ALL; - config.rx_filter = HWTSTAMP_FILTER_ALL; + config->rx_filter = HWTSTAMP_FILTER_ALL; break; } /* fall through */ default: - config.rx_filter = HWTSTAMP_FILTER_NONE; + config->rx_filter = HWTSTAMP_FILTER_NONE; return -ERANGE; } @@ -599,15 +651,14 @@ int igb_ptp_hwtstamp_ioctl(struct net_device *netdev, return 0; } - /* - * Per-packet timestamping only works if all packets are + /* Per-packet timestamping only works if all packets are * timestamped, so enable timestamping in all packets as - * long as one rx filter was configured. + * long as one Rx filter was configured. */ if ((hw->mac.type >= e1000_82580) && tsync_rx_ctl) { tsync_rx_ctl = E1000_TSYNCRXCTL_ENABLED; tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_ALL; - config.rx_filter = HWTSTAMP_FILTER_ALL; + config->rx_filter = HWTSTAMP_FILTER_ALL; is_l2 = true; is_l4 = true; @@ -643,7 +694,6 @@ int igb_ptp_hwtstamp_ioctl(struct net_device *netdev, else wr32(E1000_ETQF(3), 0); -#define PTP_PORT 319 /* L4 Queue Filter[3]: filter by destination port and protocol */ if (is_l4) { u32 ftqf = (IPPROTO_UDP /* UDP */ @@ -652,12 +702,12 @@ int igb_ptp_hwtstamp_ioctl(struct net_device *netdev, | E1000_FTQF_MASK); /* mask all inputs */ ftqf &= ~E1000_FTQF_MASK_PROTO_BP; /* enable protocol check */ - wr32(E1000_IMIR(3), htons(PTP_PORT)); + wr32(E1000_IMIR(3), htons(PTP_EV_PORT)); wr32(E1000_IMIREXT(3), (E1000_IMIREXT_SIZE_BP | E1000_IMIREXT_CTRL_BP)); if (hw->mac.type == e1000_82576) { /* enable source port check */ - wr32(E1000_SPQF(3), htons(PTP_PORT)); + wr32(E1000_SPQF(3), htons(PTP_EV_PORT)); ftqf &= ~E1000_FTQF_MASK_SOURCE_PORT_BP; } wr32(E1000_FTQF(3), ftqf); @@ -672,6 +722,32 @@ int igb_ptp_hwtstamp_ioctl(struct net_device *netdev, regval = rd32(E1000_RXSTMPL); regval = rd32(E1000_RXSTMPH); + return 0; +} + +/** + * igb_ptp_set_ts_config - set hardware time stamping config + * @netdev: + * @ifreq: + * + **/ +int igb_ptp_set_ts_config(struct net_device *netdev, struct ifreq *ifr) +{ + struct igb_adapter *adapter = netdev_priv(netdev); + struct hwtstamp_config config; + int err; + + if (copy_from_user(&config, ifr->ifr_data, sizeof(config))) + return -EFAULT; + + err = igb_ptp_set_timestamp_mode(adapter, &config); + if (err) + return err; + + /* save these settings for future reference */ + memcpy(&adapter->tstamp_config, &config, + sizeof(adapter->tstamp_config)); + return copy_to_user(ifr->ifr_data, &config, sizeof(config)) ? -EFAULT : 0; } @@ -685,14 +761,14 @@ void igb_ptp_init(struct igb_adapter *adapter) case e1000_82576: snprintf(adapter->ptp_caps.name, 16, "%pm", netdev->dev_addr); adapter->ptp_caps.owner = THIS_MODULE; - adapter->ptp_caps.max_adj = 1000000000; + adapter->ptp_caps.max_adj = 999999881; adapter->ptp_caps.n_ext_ts = 0; adapter->ptp_caps.pps = 0; adapter->ptp_caps.adjfreq = igb_ptp_adjfreq_82576; adapter->ptp_caps.adjtime = igb_ptp_adjtime_82576; adapter->ptp_caps.gettime = igb_ptp_gettime_82576; adapter->ptp_caps.settime = igb_ptp_settime_82576; - adapter->ptp_caps.enable = igb_ptp_enable; + adapter->ptp_caps.enable = igb_ptp_feature_enable; adapter->cc.read = igb_ptp_read_82576; adapter->cc.mask = CLOCKSOURCE_MASK(64); adapter->cc.mult = 1; @@ -701,6 +777,7 @@ void igb_ptp_init(struct igb_adapter *adapter) wr32(E1000_TIMINCA, INCPERIOD_82576 | INCVALUE_82576); break; case e1000_82580: + case e1000_i354: case e1000_i350: snprintf(adapter->ptp_caps.name, 16, "%pm", netdev->dev_addr); adapter->ptp_caps.owner = THIS_MODULE; @@ -711,7 +788,7 @@ void igb_ptp_init(struct igb_adapter *adapter) adapter->ptp_caps.adjtime = igb_ptp_adjtime_82576; adapter->ptp_caps.gettime = igb_ptp_gettime_82576; adapter->ptp_caps.settime = igb_ptp_settime_82576; - adapter->ptp_caps.enable = igb_ptp_enable; + adapter->ptp_caps.enable = igb_ptp_feature_enable; adapter->cc.read = igb_ptp_read_82580; adapter->cc.mask = CLOCKSOURCE_MASK(IGB_NBITS_82580); adapter->cc.mult = 1; @@ -730,7 +807,7 @@ void igb_ptp_init(struct igb_adapter *adapter) 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_enable; + adapter->ptp_caps.enable = igb_ptp_feature_enable; /* Enable the timer functions by clearing bit 31. */ wr32(E1000_TSAUXC, 0x0); break; @@ -762,10 +839,13 @@ void igb_ptp_init(struct igb_adapter *adapter) /* Initialize the time sync interrupts for devices that support it. */ if (hw->mac.type >= e1000_82580) { - wr32(E1000_TSIM, E1000_TSIM_TXTS); + wr32(E1000_TSIM, TSYNC_INTERRUPTS); wr32(E1000_IMS, E1000_IMS_TS); } + adapter->tstamp_config.rx_filter = HWTSTAMP_FILTER_NONE; + adapter->tstamp_config.tx_type = HWTSTAMP_TX_OFF; + adapter->ptp_clock = ptp_clock_register(&adapter->ptp_caps, &adapter->pdev->dev); if (IS_ERR(adapter->ptp_clock)) { @@ -789,6 +869,7 @@ void igb_ptp_stop(struct igb_adapter *adapter) switch (adapter->hw.mac.type) { case e1000_82576: case e1000_82580: + case e1000_i354: case e1000_i350: cancel_delayed_work_sync(&adapter->ptp_overflow_work); break; @@ -801,6 +882,11 @@ void igb_ptp_stop(struct igb_adapter *adapter) } cancel_work_sync(&adapter->ptp_tx_work); + if (adapter->ptp_tx_skb) { + dev_kfree_skb_any(adapter->ptp_tx_skb); + adapter->ptp_tx_skb = NULL; + clear_bit_unlock(__IGB_PTP_TX_IN_PROGRESS, &adapter->state); + } if (adapter->ptp_clock) { ptp_clock_unregister(adapter->ptp_clock); @@ -823,18 +909,22 @@ void igb_ptp_reset(struct igb_adapter *adapter) if (!(adapter->flags & IGB_FLAG_PTP)) return; + /* reset the tstamp_config */ + igb_ptp_set_timestamp_mode(adapter, &adapter->tstamp_config); + switch (adapter->hw.mac.type) { case e1000_82576: /* Dial the nominal frequency. */ wr32(E1000_TIMINCA, INCPERIOD_82576 | INCVALUE_82576); break; case e1000_82580: + case e1000_i354: case e1000_i350: case e1000_i210: case e1000_i211: /* Enable the timer functions and interrupts. */ wr32(E1000_TSAUXC, 0x0); - wr32(E1000_TSIM, E1000_TSIM_TXTS); + wr32(E1000_TSIM, TSYNC_INTERRUPTS); wr32(E1000_IMS, E1000_IMS_TS); break; default: |
