diff options
| -rw-r--r-- | drivers/net/ethernet/intel/Kconfig | 1 | ||||
| -rw-r--r-- | drivers/net/ethernet/intel/i40e/Makefile | 1 | ||||
| -rw-r--r-- | drivers/net/ethernet/intel/i40e/i40e.h | 26 | ||||
| -rw-r--r-- | drivers/net/ethernet/intel/i40e/i40e_ethtool.c | 33 | ||||
| -rw-r--r-- | drivers/net/ethernet/intel/i40e/i40e_main.c | 47 | ||||
| -rw-r--r-- | drivers/net/ethernet/intel/i40e/i40e_ptp.c | 662 | ||||
| -rw-r--r-- | drivers/net/ethernet/intel/i40e/i40e_txrx.c | 53 | ||||
| -rw-r--r-- | drivers/net/ethernet/intel/i40e/i40e_txrx.h | 3 |
8 files changed, 824 insertions, 2 deletions
diff --git a/drivers/net/ethernet/intel/Kconfig b/drivers/net/ethernet/intel/Kconfig index 9fb2eb8cf152..333bb54d0bdf 100644 --- a/drivers/net/ethernet/intel/Kconfig +++ b/drivers/net/ethernet/intel/Kconfig @@ -243,6 +243,7 @@ config IXGBEVF config I40E tristate "Intel(R) Ethernet Controller XL710 Family support" + select PTP_1588_CLOCK depends on PCI ---help--- This driver supports Intel(R) Ethernet Controller XL710 Family of diff --git a/drivers/net/ethernet/intel/i40e/Makefile b/drivers/net/ethernet/intel/i40e/Makefile index 6ec1a795f184..e4d2e27078a7 100644 --- a/drivers/net/ethernet/intel/i40e/Makefile +++ b/drivers/net/ethernet/intel/i40e/Makefile @@ -40,4 +40,5 @@ i40e-objs := i40e_main.o \ i40e_debugfs.o \ i40e_diag.o \ i40e_txrx.o \ + i40e_ptp.o \ i40e_virtchnl_pf.o diff --git a/drivers/net/ethernet/intel/i40e/i40e.h b/drivers/net/ethernet/intel/i40e/i40e.h index 7dab660a8e50..c05984d72cfb 100644 --- a/drivers/net/ethernet/intel/i40e/i40e.h +++ b/drivers/net/ethernet/intel/i40e/i40e.h @@ -50,6 +50,9 @@ #include <net/ip6_checksum.h> #include <linux/ethtool.h> #include <linux/if_vlan.h> +#include <linux/clocksource.h> +#include <linux/net_tstamp.h> +#include <linux/ptp_clock_kernel.h> #include "i40e_type.h" #include "i40e_prototype.h" #include "i40e_virtchnl.h" @@ -242,6 +245,7 @@ struct i40e_pf { #define I40E_FLAG_DCB_ENABLED (u64)(1 << 20) #define I40E_FLAG_FDIR_ENABLED (u64)(1 << 21) #define I40E_FLAG_FDIR_ATR_ENABLED (u64)(1 << 22) +#define I40E_FLAG_PTP (u64)(1 << 25) #define I40E_FLAG_MFP_ENABLED (u64)(1 << 26) #ifdef CONFIG_I40E_VXLAN #define I40E_FLAG_VXLAN_FILTER_SYNC (u64)(1 << 27) @@ -302,6 +306,20 @@ struct i40e_pf { u32 fcoe_hmc_filt_num; u32 fcoe_hmc_cntx_num; struct i40e_filter_control_settings filter_settings; + + struct ptp_clock *ptp_clock; + struct ptp_clock_info ptp_caps; + struct sk_buff *ptp_tx_skb; + struct work_struct ptp_tx_work; + struct hwtstamp_config tstamp_config; + unsigned long ptp_tx_start; + unsigned long last_rx_ptp_check; + spinlock_t tmreg_lock; /* Used to protect the device time registers. */ + u64 ptp_base_adj; + u32 tx_hwtstamp_timeouts; + u32 rx_hwtstamp_cleared; + bool ptp_tx; + bool ptp_rx; }; struct i40e_mac_filter { @@ -566,4 +584,12 @@ struct i40e_mac_filter *i40e_find_mac(struct i40e_vsi *vsi, u8 *macaddr, bool is_vf, bool is_netdev); void i40e_vlan_stripping_enable(struct i40e_vsi *vsi); +void i40e_ptp_rx_hang(struct i40e_vsi *vsi); +void i40e_ptp_tx_hwtstamp(struct i40e_pf *pf); +void i40e_ptp_rx_hwtstamp(struct i40e_pf *pf, struct sk_buff *skb, u8 index); +void i40e_ptp_set_increment(struct i40e_pf *pf); +int i40e_ptp_set_ts_config(struct i40e_pf *pf, struct ifreq *ifr); +int i40e_ptp_get_ts_config(struct i40e_pf *pf, struct ifreq *ifr); +void i40e_ptp_init(struct i40e_pf *pf); +void i40e_ptp_stop(struct i40e_pf *pf); #endif /* _I40E_H_ */ diff --git a/drivers/net/ethernet/intel/i40e/i40e_ethtool.c b/drivers/net/ethernet/intel/i40e/i40e_ethtool.c index 342a6e13ac8b..7b87d5115816 100644 --- a/drivers/net/ethernet/intel/i40e/i40e_ethtool.c +++ b/drivers/net/ethernet/intel/i40e/i40e_ethtool.c @@ -108,6 +108,8 @@ static struct i40e_stats i40e_gstrings_stats[] = { I40E_PF_STAT("rx_oversize", stats.rx_oversize), I40E_PF_STAT("rx_jabber", stats.rx_jabber), I40E_PF_STAT("VF_admin_queue_requests", vf_aq_requests), + I40E_PF_STAT("tx_hwtstamp_timeouts", tx_hwtstamp_timeouts), + I40E_PF_STAT("rx_hwtstamp_cleared", rx_hwtstamp_cleared), }; #define I40E_QUEUE_STATS_LEN(n) \ @@ -748,7 +750,36 @@ static void i40e_get_strings(struct net_device *netdev, u32 stringset, static int i40e_get_ts_info(struct net_device *dev, struct ethtool_ts_info *info) { - return ethtool_op_get_ts_info(dev, info); + struct i40e_pf *pf = i40e_netdev_to_pf(dev); + + info->so_timestamping = SOF_TIMESTAMPING_TX_SOFTWARE | + SOF_TIMESTAMPING_RX_SOFTWARE | + SOF_TIMESTAMPING_SOFTWARE | + SOF_TIMESTAMPING_TX_HARDWARE | + SOF_TIMESTAMPING_RX_HARDWARE | + SOF_TIMESTAMPING_RAW_HARDWARE; + + if (pf->ptp_clock) + info->phc_index = ptp_clock_index(pf->ptp_clock); + else + info->phc_index = -1; + + info->tx_types = (1 << HWTSTAMP_TX_OFF) | (1 << HWTSTAMP_TX_ON); + + info->rx_filters = (1 << HWTSTAMP_FILTER_NONE) | + (1 << HWTSTAMP_FILTER_PTP_V1_L4_SYNC) | + (1 << HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ) | + (1 << HWTSTAMP_FILTER_PTP_V2_EVENT) | + (1 << HWTSTAMP_FILTER_PTP_V2_L2_EVENT) | + (1 << HWTSTAMP_FILTER_PTP_V2_L4_EVENT) | + (1 << HWTSTAMP_FILTER_PTP_V2_SYNC) | + (1 << HWTSTAMP_FILTER_PTP_V2_L2_SYNC) | + (1 << HWTSTAMP_FILTER_PTP_V2_L4_SYNC) | + (1 << HWTSTAMP_FILTER_PTP_V2_DELAY_REQ) | + (1 << HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ) | + (1 << HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ); + + return 0; } static int i40e_link_test(struct net_device *netdev, u64 *data) diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c index 182ed1893b1f..b4e4da5ca7bb 100644 --- a/drivers/net/ethernet/intel/i40e/i40e_main.c +++ b/drivers/net/ethernet/intel/i40e/i40e_main.c @@ -1698,6 +1698,27 @@ static int i40e_change_mtu(struct net_device *netdev, int new_mtu) } /** + * i40e_ioctl - Access the hwtstamp interface + * @netdev: network interface device structure + * @ifr: interface request data + * @cmd: ioctl command + **/ +int i40e_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd) +{ + struct i40e_netdev_priv *np = netdev_priv(netdev); + struct i40e_pf *pf = np->vsi->back; + + switch (cmd) { + case SIOCGHWTSTAMP: + return i40e_ptp_get_ts_config(pf, ifr); + case SIOCSHWTSTAMP: + return i40e_ptp_set_ts_config(pf, ifr); + default: + return -EOPNOTSUPP; + } +} + +/** * i40e_vlan_stripping_enable - Turn on vlan stripping for the VSI * @vsi: the vsi being adjusted **/ @@ -2150,7 +2171,8 @@ static int i40e_configure_tx_ring(struct i40e_ring *ring) tx_ctx.base = (ring->dma / 128); tx_ctx.qlen = ring->count; tx_ctx.fd_ena = !!(vsi->back->flags & (I40E_FLAG_FDIR_ENABLED | - I40E_FLAG_FDIR_ATR_ENABLED)); + I40E_FLAG_FDIR_ATR_ENABLED)); + tx_ctx.timesync_ena = !!(vsi->back->flags & I40E_FLAG_PTP); /* As part of VSI creation/update, FW allocates certain * Tx arbitration queue sets for each TC enabled for @@ -2488,6 +2510,7 @@ static void i40e_enable_misc_int_causes(struct i40e_hw *hw) I40E_PFINT_ICR0_ENA_GRST_MASK | I40E_PFINT_ICR0_ENA_PCI_EXCEPTION_MASK | I40E_PFINT_ICR0_ENA_GPIO_MASK | + I40E_PFINT_ICR0_ENA_TIMESYNC_MASK | I40E_PFINT_ICR0_ENA_STORM_DETECT_MASK | I40E_PFINT_ICR0_ENA_HMC_ERR_MASK | I40E_PFINT_ICR0_ENA_VFLR_MASK | @@ -2831,6 +2854,18 @@ static irqreturn_t i40e_intr(int irq, void *data) dev_info(&pf->pdev->dev, "HMC error interrupt\n"); } + if (icr0 & I40E_PFINT_ICR0_TIMESYNC_MASK) { + u32 prttsyn_stat = rd32(hw, I40E_PRTTSYN_STAT_0); + + if (prttsyn_stat & I40E_PRTTSYN_STAT_0_TXTIME_MASK) { + ena_mask &= ~I40E_PFINT_ICR0_ENA_TIMESYNC_MASK; + i40e_ptp_tx_hwtstamp(pf); + prttsyn_stat &= ~I40E_PRTTSYN_STAT_0_TXTIME_MASK; + } + + wr32(hw, I40E_PRTTSYN_STAT_0, prttsyn_stat); + } + /* If a critical error is pending we have no choice but to reset the * device. * Report and mask out any remaining unexpected interrupts. @@ -4304,6 +4339,9 @@ static void i40e_link_event(struct i40e_pf *pf) if (pf->vf) i40e_vc_notify_link_state(pf); + + if (pf->flags & I40E_FLAG_PTP) + i40e_ptp_set_increment(pf); } /** @@ -4385,6 +4423,8 @@ static void i40e_watchdog_subtask(struct i40e_pf *pf) for (i = 0; i < I40E_MAX_VEB; i++) if (pf->veb[i]) i40e_update_veb_stats(pf->veb[i]); + + i40e_ptp_rx_hang(pf->vsi[pf->lan_vsi]); } /** @@ -6033,6 +6073,7 @@ static const struct net_device_ops i40e_netdev_ops = { .ndo_validate_addr = eth_validate_addr, .ndo_set_mac_address = i40e_set_mac, .ndo_change_mtu = i40e_change_mtu, + .ndo_do_ioctl = i40e_ioctl, .ndo_tx_timeout = i40e_tx_timeout, .ndo_vlan_rx_add_vid = i40e_vlan_rx_add_vid, .ndo_vlan_rx_kill_vid = i40e_vlan_rx_kill_vid, @@ -7299,6 +7340,8 @@ no_autoneg: ~I40E_PRTDCB_MFLCN_RFCE_MASK); fc_complete: + i40e_ptp_init(pf); + return ret; } @@ -7803,6 +7846,8 @@ static void i40e_remove(struct pci_dev *pdev) i40e_dbg_pf_exit(pf); + i40e_ptp_stop(pf); + if (pf->flags & I40E_FLAG_SRIOV_ENABLED) { i40e_free_vfs(pf); pf->flags &= ~I40E_FLAG_SRIOV_ENABLED; diff --git a/drivers/net/ethernet/intel/i40e/i40e_ptp.c b/drivers/net/ethernet/intel/i40e/i40e_ptp.c new file mode 100644 index 000000000000..e33ec6c842b7 --- /dev/null +++ b/drivers/net/ethernet/intel/i40e/i40e_ptp.c @@ -0,0 +1,662 @@ +/******************************************************************************* + * + * Intel Ethernet Controller XL710 Family Linux Driver + * Copyright(c) 2013 - 2014 Intel Corporation. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of 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, see <http://www.gnu.org/licenses/>. + * + * The full GNU General Public License is included in this distribution in + * the file called "COPYING". + * + * Contact Information: + * e1000-devel Mailing List <e1000-devel@lists.sourceforge.net> + * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 + * + ******************************************************************************/ + +#include "i40e.h" +#include <linux/export.h> +#include <linux/ptp_classify.h> + +/* The XL710 timesync is very much like Intel's 82599 design when it comes to + * the fundamental clock design. However, the clock operations are much simpler + * in the XL710 because the device supports a full 64 bits of nanoseconds. + * Because the field is so wide, we can forgo the cycle counter and just + * operate with the nanosecond field directly without fear of overflow. + * + * Much like the 82599, the update period is dependent upon the link speed: + * At 40Gb link or no link, the period is 1.6ns. + * At 10Gb link, the period is multiplied by 2. (3.2ns) + * At 1Gb link, the period is multiplied by 20. (32ns) + * 1588 functionality is not supported at 100Mbps. + */ +#define I40E_PTP_40GB_INCVAL 0x0199999999ULL +#define I40E_PTP_10GB_INCVAL 0x0333333333ULL +#define I40E_PTP_1GB_INCVAL 0x2000000000ULL + +#define I40E_PRTTSYN_CTL1_TSYNTYPE_V1 (0x1 << \ + I40E_PRTTSYN_CTL1_TSYNTYPE_SHIFT) +#define I40E_PRTTSYN_CTL1_TSYNTYPE_V2 (0x2 << \ + I40E_PRTTSYN_CTL1_TSYNTYPE_SHIFT) +#define I40E_PTP_TX_TIMEOUT (HZ * 15) + +/** + * i40e_ptp_read - Read the PHC time from the device + * @pf: Board private structure + * @ts: timespec structure to hold the current time value + * + * This function reads the PRTTSYN_TIME registers and stores them in a + * timespec. However, since the registers are 64 bits of nanoseconds, we must + * convert the result to a timespec before we can return. + **/ +static void i40e_ptp_read(struct i40e_pf *pf, struct timespec *ts) +{ + struct i40e_hw *hw = &pf->hw; + u32 hi, lo; + u64 ns; + + /* The timer latches on the lowest register read. */ + lo = rd32(hw, I40E_PRTTSYN_TIME_L); + hi = rd32(hw, I40E_PRTTSYN_TIME_H); + + ns = (((u64)hi) << 32) | lo; + + *ts = ns_to_timespec(ns); +} + +/** + * i40e_ptp_write - Write the PHC time to the device + * @pf: Board private structure + * @ts: timespec structure that holds the new time value + * + * This function writes the PRTTSYN_TIME registers with the user value. Since + * we receive a timespec from the stack, we must convert that timespec into + * nanoseconds before programming the registers. + **/ +static void i40e_ptp_write(struct i40e_pf *pf, const struct timespec *ts) +{ + struct i40e_hw *hw = &pf->hw; + u64 ns = timespec_to_ns(ts); + + /* The timer will not update until the high register is written, so + * write the low register first. + */ + wr32(hw, I40E_PRTTSYN_TIME_L, ns & 0xFFFFFFFF); + wr32(hw, I40E_PRTTSYN_TIME_H, ns >> 32); +} + +/** + * i40e_ptp_convert_to_hwtstamp - Convert device clock to system time + * @hwtstamps: Timestamp structure to update + * @timestamp: Timestamp from the hardware + * + * We need to convert the NIC clock value into a hwtstamp which can be used by + * the upper level timestamping functions. Since the timestamp is simply a 64- + * bit nanosecond value, we can call ns_to_ktime directly to handle this. + **/ +static void i40e_ptp_convert_to_hwtstamp(struct skb_shared_hwtstamps *hwtstamps, + u64 timestamp) +{ + memset(hwtstamps, 0, sizeof(*hwtstamps)); + + hwtstamps->hwtstamp = ns_to_ktime(timestamp); +} + +/** + * i40e_ptp_adjfreq - Adjust the PHC frequency + * @ptp: The PTP clock structure + * @ppb: Parts per billion adjustment from the base + * + * Adjust the frequency of the PHC by the indicated parts per billion from the + * base frequency. + **/ +static int i40e_ptp_adjfreq(struct ptp_clock_info *ptp, s32 ppb) +{ + struct i40e_pf *pf = container_of(ptp, struct i40e_pf, ptp_caps); + struct i40e_hw *hw = &pf->hw; + u64 adj, freq, diff; + int neg_adj = 0; + + if (ppb < 0) { + neg_adj = 1; + ppb = -ppb; + } + + smp_mb(); /* Force any pending update before accessing. */ + adj = ACCESS_ONCE(pf->ptp_base_adj); + + freq = adj; + freq *= ppb; + diff = div_u64(freq, 1000000000ULL); + + if (neg_adj) + adj -= diff; + else + adj += diff; + + wr32(hw, I40E_PRTTSYN_INC_L, adj & 0xFFFFFFFF); + wr32(hw, I40E_PRTTSYN_INC_H, adj >> 32); + + return 0; +} + +/** + * i40e_ptp_adjtime - Adjust the PHC time + * @ptp: The PTP clock structure + * @delta: Offset in nanoseconds to adjust the PHC time by + * + * Adjust the frequency of the PHC by the indicated parts per billion from the + * base frequency. + **/ +static int i40e_ptp_adjtime(struct ptp_clock_info *ptp, s64 delta) +{ + struct i40e_pf *pf = container_of(ptp, struct i40e_pf, ptp_caps); + struct timespec now, then = ns_to_timespec(delta); + unsigned long flags; + + spin_lock_irqsave(&pf->tmreg_lock, flags); + + i40e_ptp_read(pf, &now); + now = timespec_add(now, then); + i40e_ptp_write(pf, (const struct timespec *)&now); + + spin_unlock_irqrestore(&pf->tmreg_lock, flags); + + return 0; +} + +/** + * i40e_ptp_gettime - Get the time of the PHC + * @ptp: The PTP clock structure + * @ts: timespec structure to hold the current time value + * + * Read the device clock and return the correct value on ns, after converting it + * into a timespec struct. + **/ +static int i40e_ptp_gettime(struct ptp_clock_info *ptp, struct timespec *ts) +{ + struct i40e_pf *pf = container_of(ptp, struct i40e_pf, ptp_caps); + unsigned long flags; + + spin_lock_irqsave(&pf->tmreg_lock, flags); + i40e_ptp_read(pf, ts); + spin_unlock_irqrestore(&pf->tmreg_lock, flags); + + return 0; +} + +/** + * i40e_ptp_settime - Set the time of the PHC + * @ptp: The PTP clock structure + * @ts: timespec structure that holds the new time value + * + * Set the device clock to the user input value. The conversion from timespec + * to ns happens in the write function. + **/ +static int i40e_ptp_settime(struct ptp_clock_info *ptp, + const struct timespec *ts) +{ + struct i40e_pf *pf = container_of(ptp, struct i40e_pf, ptp_caps); + unsigned long flags; + + spin_lock_irqsave(&pf->tmreg_lock, flags); + i40e_ptp_write(pf, ts); + spin_unlock_irqrestore(&pf->tmreg_lock, flags); + + return 0; +} + +/** + * i40e_ptp_tx_work + * @work: pointer to work struct + * + * This work function polls the PRTTSYN_STAT_0.TXTIME bit to determine when a + * Tx timestamp event has occurred, in order to pass the Tx timestamp value up + * the stack in the skb. + */ +static void i40e_ptp_tx_work(struct work_struct *work) +{ + struct i40e_pf *pf = container_of(work, struct i40e_pf, + ptp_tx_work); + struct i40e_hw *hw = &pf->hw; + u32 prttsyn_stat_0; + + if (!pf->ptp_tx_skb) + return; + + if (time_is_before_jiffies(pf->ptp_tx_start + + I40E_PTP_TX_TIMEOUT)) { + dev_kfree_skb_any(pf->ptp_tx_skb); + pf->ptp_tx_skb = NULL; + pf->tx_hwtstamp_timeouts++; + dev_warn(&pf->pdev->dev, "clearing Tx timestamp hang"); + return; + } + + prttsyn_stat_0 = rd32(hw, I40E_PRTTSYN_STAT_0); + if (prttsyn_stat_0 & I40E_PRTTSYN_STAT_0_TXTIME_MASK) + i40e_ptp_tx_hwtstamp(pf); + else + schedule_work(&pf->ptp_tx_work); +} + +/** + * i40e_ptp_enable - Enable/disable ancillary features of the PHC subsystem + * @ptp: The PTP clock structure + * @rq: The requested feature to change + * @on: Enable/disable flag + * + * The XL710 does not support any of the ancillary features of the PHC + * subsystem, so this function may just return. + **/ +static int i40e_ptp_enable(struct ptp_clock_info *ptp, + struct ptp_clock_request *rq, int on) +{ + return -EOPNOTSUPP; +} + +/** + * i40e_ptp_rx_hang - Detect error case when Rx timestamp registers are hung + * @vsi: The VSI with the rings relevant to 1588 + * + * 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 i40e_ptp_rx_hang(struct i40e_vsi *vsi) +{ + struct i40e_pf *pf = vsi->back; + struct i40e_hw *hw = &pf->hw; + struct i40e_ring *rx_ring; + unsigned long rx_event; + u32 prttsyn_stat; + int n; + + if (pf->flags & I40E_FLAG_PTP) + return; + + prttsyn_stat = rd32(hw, I40E_PRTTSYN_STAT_1); + + /* Unless all four receive timestamp registers are latched, we are not + * concerned about a possible PTP Rx hang, so just update the timeout + * counter and exit. + */ + if (!(prttsyn_stat & ((I40E_PRTTSYN_STAT_1_RXT0_MASK << + I40E_PRTTSYN_STAT_1_RXT0_SHIFT) | + (I40E_PRTTSYN_STAT_1_RXT1_MASK << + I40E_PRTTSYN_STAT_1_RXT1_SHIFT) | + (I40E_PRTTSYN_STAT_1_RXT2_MASK << + I40E_PRTTSYN_STAT_1_RXT2_SHIFT) | + (I40E_PRTTSYN_STAT_1_RXT3_MASK << + I40E_PRTTSYN_STAT_1_RXT3_SHIFT)))) { + pf->last_rx_ptp_check = jiffies; + return; + } + + /* Determine the most recent watchdog or rx_timestamp event. */ + rx_event = pf->last_rx_ptp_check; + for (n = 0; n < vsi->num_queue_pairs; n++) { + rx_ring = vsi->rx_rings[n]; + if (time_after(rx_ring->last_rx_timestamp, rx_event)) + rx_event = rx_ring->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(hw, I40E_PRTTSYN_RXTIME_H(0)); + rd32(hw, I40E_PRTTSYN_RXTIME_H(1)); + rd32(hw, I40E_PRTTSYN_RXTIME_H(2)); + rd32(hw, I40E_PRTTSYN_RXTIME_H(3)); + pf->last_rx_ptp_check = jiffies; + pf->rx_hwtstamp_cleared++; + dev_warn(&vsi->back->pdev->dev, + "%s: clearing Rx timestamp hang", + __func__); + } +} + +/** + * i40e_ptp_tx_hwtstamp - Utility function which returns the Tx timestamp + * @pf: Board private structure + * + * Read the value of the Tx timestamp from the registers, convert it into a + * value consumable by the stack, and store that result into the shhwtstamps + * struct before returning it up the stack. + **/ +void i40e_ptp_tx_hwtstamp(struct i40e_pf *pf) +{ + struct skb_shared_hwtstamps shhwtstamps; + struct i40e_hw *hw = &pf->hw; + u32 hi, lo; + u64 ns; + + lo = rd32(hw, I40E_PRTTSYN_TXTIME_L); + hi = rd32(hw, I40E_PRTTSYN_TXTIME_H); + + ns = (((u64)hi) << 32) | lo; + + i40e_ptp_convert_to_hwtstamp(&shhwtstamps, ns); + skb_tstamp_tx(pf->ptp_tx_skb, &shhwtstamps); + dev_kfree_skb_any(pf->ptp_tx_skb); + pf->ptp_tx_skb = NULL; +} + +/** + * i40e_ptp_rx_hwtstamp - Utility function which checks for an Rx timestamp + * @pf: Board private structure + * @skb: Particular skb to send timestamp with + * @index: Index into the receive timestamp registers for the timestamp + * + * The XL710 receives a notification in the receive descriptor with an offset + * into the set of RXTIME registers where the timestamp is for that skb. This + * function goes and fetches the receive timestamp from that offset, if a valid + * one exists. The RXTIME registers are in ns, so we must convert the result + * first. + **/ +void i40e_ptp_rx_hwtstamp(struct i40e_pf *pf, struct sk_buff *skb, u8 index) +{ + u32 prttsyn_stat, hi, lo; + struct i40e_hw *hw; + u64 ns; + + /* Since we cannot turn off the Rx timestamp logic if the device is + * doing Tx timestamping, check if Rx timestamping is configured. + */ + if (!pf->ptp_rx) + return; + + hw = &pf->hw; + + prttsyn_stat = rd32(hw, I40E_PRTTSYN_STAT_1); + + if (!(prttsyn_stat & (1 << index))) + return; + + lo = rd32(hw, I40E_PRTTSYN_RXTIME_L(index)); + hi = rd32(hw, I40E_PRTTSYN_RXTIME_H(index)); + + ns = (((u64)hi) << 32) | lo; + + i40e_ptp_convert_to_hwtstamp(skb_hwtstamps(skb), ns); +} + +/** + * i40e_ptp_set_increment - Utility function to update clock increment rate + * @pf: Board private structure + * + * During a link change, the DMA frequency that drives the 1588 logic will + * change. In order to keep the PRTTSYN_TIME registers in units of nanoseconds, + * we must update the increment value per clock tick. + **/ +void i40e_ptp_set_increment(struct i40e_pf *pf) +{ + struct i40e_link_status *hw_link_info; + struct i40e_hw *hw = &pf->hw; + u64 incval; + + hw_link_info = &hw->phy.link_info; + + i40e_aq_get_link_info(&pf->hw, true, NULL, NULL); + + switch (hw_link_info->link_speed) { + case I40E_LINK_SPEED_10GB: + incval = I40E_PTP_10GB_INCVAL; + break; + case I40E_LINK_SPEED_1GB: + incval = I40E_PTP_1GB_INCVAL; + break; + case I40E_LINK_SPEED_100MB: + dev_warn(&pf->pdev->dev, + "%s: 1588 functionality is not supported at 100 Mbps. Stopping the PHC.\n", + __func__); + incval = 0; + break; + case I40E_LINK_SPEED_40GB: + default: + incval = I40E_PTP_40GB_INCVAL; + break; + } + + /* Write the new increment value into the increment register. The + * hardware will not update the clock until both registers have been + * written. + */ + wr32(hw, I40E_PRTTSYN_INC_L, incval & 0xFFFFFFFF); + wr32(hw, I40E_PRTTSYN_INC_H, incval >> 32); + + /* Update the base adjustement value. */ + ACCESS_ONCE(pf->ptp_base_adj) = incval; + smp_mb(); /* Force the above update. */ +} + +/** + * i40e_ptp_get_ts_config - ioctl interface to read the HW timestamping + * @pf: Board private structure + * @ifreq: ioctl data + * + * Obtain the current hardware timestamping settigs as requested. To do this, + * keep a shadow copy of the timestamp settings rather than attempting to + * deconstruct it from the registers. + **/ +int i40e_ptp_get_ts_config(struct i40e_pf *pf, struct ifreq *ifr) +{ + struct hwtstamp_config *config = &pf->tstamp_config; + + return copy_to_user(ifr->ifr_data, config, sizeof(*config)) ? + -EFAULT : 0; +} + +/** + * i40e_ptp_set_ts_config - ioctl interface to control the HW timestamping + * @pf: Board private structure + * @ifreq: ioctl data + * + * Respond to the user filter requests and make the appropriate hardware + * changes here. The XL710 cannot support splitting of the Tx/Rx timestamping + * logic, so keep track in software of whether to indicate these timestamps + * or not. + * + * It is permissible to "upgrade" the user request to a broader filter, as long + * as the user receives the timestamps they care about and the user is notified + * the filter has been broadened. + **/ +int i40e_ptp_set_ts_config(struct i40e_pf *pf, struct ifreq *ifr) +{ + struct i40e_hw *hw = &pf->hw; + struct hwtstamp_config *config = &pf->tstamp_config; + u32 pf_id, tsyntype, regval; + + if (copy_from_user(config, ifr->ifr_data, sizeof(*config))) + return -EFAULT; + + /* Reserved for future extensions. */ + if (config->flags) + return -EINVAL; + + /* Confirm that 1588 is supported on this PF. */ + pf_id = (rd32(hw, I40E_PRTTSYN_CTL0) & I40E_PRTTSYN_CTL0_PF_ID_MASK) >> + I40E_PRTTSYN_CTL0_PF_ID_SHIFT; + if (hw->pf_id != pf_id) + return -EINVAL; + + switch (config->tx_type) { + case HWTSTAMP_TX_OFF: + pf->ptp_tx = false; + break; + case HWTSTAMP_TX_ON: + pf->ptp_tx = true; + break; + default: + return -ERANGE; + } + + switch (config->rx_filter) { + case HWTSTAMP_FILTER_NONE: + pf->ptp_rx = false; + tsyntype = 0; + break; + case HWTSTAMP_FILTER_PTP_V1_L4_SYNC: + case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ: + case HWTSTAMP_FILTER_PTP_V1_L4_EVENT: + pf->ptp_rx = true; + tsyntype = I40E_PRTTSYN_CTL1_V1MESSTYPE0_MASK | + I40E_PRTTSYN_CTL1_TSYNTYPE_V1 | + I40E_PRTTSYN_CTL1_UDP_ENA_MASK; + config->rx_filter = HWTSTAMP_FILTER_PTP_V1_L4_EVENT; + break; + case HWTSTAMP_FILTER_PTP_V2_EVENT: + case HWTSTAMP_FILTER_PTP_V2_L2_EVENT: + case HWTSTAMP_FILTER_PTP_V2_L4_EVENT: + case HWTSTAMP_FILTER_PTP_V2_SYNC: + case HWTSTAMP_FILTER_PTP_V2_L2_SYNC: + case HWTSTAMP_FILTER_PTP_V2_L4_SYNC: + case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ: + case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ: + case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ: + pf->ptp_rx = true; + tsyntype = I40E_PRTTSYN_CTL1_V2MESSTYPE0_MASK | + I40E_PRTTSYN_CTL1_TSYNTYPE_V2 | + I40E_PRTTSYN_CTL1_UDP_ENA_MASK; + config->rx_filter = HWTSTAMP_FILTER_PTP_V2_EVENT; + break; + case HWTSTAMP_FILTER_ALL: + default: + return -ERANGE; + } + + /* Clear out all 1588-related registers to clear and unlatch them. */ + rd32(hw, I40E_PRTTSYN_STAT_0); + rd32(hw, I40E_PRTTSYN_TXTIME_H); + rd32(hw, I40E_PRTTSYN_RXTIME_H(0)); + rd32(hw, I40E_PRTTSYN_RXTIME_H(1)); + rd32(hw, I40E_PRTTSYN_RXTIME_H(2)); + rd32(hw, I40E_PRTTSYN_RXTIME_H(3)); + + /* Enable/disable the Tx timestamp interrupt based on user input. */ + regval = rd32(hw, I40E_PRTTSYN_CTL0); + if (pf->ptp_tx) + regval |= I40E_PRTTSYN_CTL0_TXTIME_INT_ENA_MASK; + else + regval &= ~I40E_PRTTSYN_CTL0_TXTIME_INT_ENA_MASK; + wr32(hw, I40E_PRTTSYN_CTL0, regval); + + regval = rd32(hw, I40E_PFINT_ICR0_ENA); + if (pf->ptp_tx) + regval |= I40E_PFINT_ICR0_ENA_TIMESYNC_MASK; + else + regval &= ~I40E_PFINT_ICR0_ENA_TIMESYNC_MASK; + wr32(hw, I40E_PFINT_ICR0_ENA, regval); + + /* There is no simple on/off switch for Rx. To "disable" Rx support, + * ignore any received timestamps, rather than turn off the clock. + */ + if (pf->ptp_rx) { + regval = rd32(hw, I40E_PRTTSYN_CTL1); + /* clear everything but the enable bit */ + regval &= I40E_PRTTSYN_CTL1_TSYNENA_MASK; + /* now enable bits for desired Rx timestamps */ + regval |= tsyntype; + wr32(hw, I40E_PRTTSYN_CTL1, regval); + } + + return copy_to_user(ifr->ifr_data, config, sizeof(*config)) ? + -EFAULT : 0; +} + +/** + * i40e_ptp_init - Initialize the 1588 support and register the PHC + * @pf: Board private structure + * + * This function registers the device clock as a PHC. If it is successful, it + * starts the clock in the hardware. + **/ +void i40e_ptp_init(struct i40e_pf *pf) +{ + struct i40e_hw *hw = &pf->hw; + struct net_device *netdev = pf->vsi[pf->lan_vsi]->netdev; + + strncpy(pf->ptp_caps.name, "i40e", sizeof(pf->ptp_caps.name)); + pf->ptp_caps.owner = THIS_MODULE; + pf->ptp_caps.max_adj = 999999999; + pf->ptp_caps.n_ext_ts = 0; + pf->ptp_caps.pps = 0; + pf->ptp_caps.adjfreq = i40e_ptp_adjfreq; + pf->ptp_caps.adjtime = i40e_ptp_adjtime; + pf->ptp_caps.gettime = i40e_ptp_gettime; + pf->ptp_caps.settime = i40e_ptp_settime; + pf->ptp_caps.enable = i40e_ptp_enable; + + /* Attempt to register the clock before enabling the hardware. */ + pf->ptp_clock = ptp_clock_register(&pf->ptp_caps, &pf->pdev->dev); + if (IS_ERR(pf->ptp_clock)) { + pf->ptp_clock = NULL; + dev_err(&pf->pdev->dev, "%s: ptp_clock_register failed\n", + __func__); + } else { + struct timespec ts; + u32 regval; + + spin_lock_init(&pf->tmreg_lock); + INIT_WORK(&pf->ptp_tx_work, i40e_ptp_tx_work); + + dev_info(&pf->pdev->dev, "%s: added PHC on %s\n", __func__, + netdev->name); + pf->flags |= I40E_FLAG_PTP; + + /* Ensure the clocks are running. */ + regval = rd32(hw, I40E_PRTTSYN_CTL0); + regval |= I40E_PRTTSYN_CTL0_TSYNENA_MASK; + wr32(hw, I40E_PRTTSYN_CTL0, regval); + regval = rd32(hw, I40E_PRTTSYN_CTL1); + regval |= I40E_PRTTSYN_CTL1_TSYNENA_MASK; + wr32(hw, I40E_PRTTSYN_CTL1, regval); + + /* Set the increment value per clock tick. */ + i40e_ptp_set_increment(pf); + + /* reset the tstamp_config */ + memset(&pf->tstamp_config, 0, sizeof(pf->tstamp_config)); + + /* Set the clock value. */ + ts = ktime_to_timespec(ktime_get_real()); + i40e_ptp_settime(&pf->ptp_caps, &ts); + } +} + +/** + * i40e_ptp_stop - Disable the driver/hardware support and unregister the PHC + * @pf: Board private structure + * + * This function handles the cleanup work required from the initialization by + * clearing out the important information and unregistering the PHC. + **/ +void i40e_ptp_stop(struct i40e_pf *pf) +{ + pf->flags &= ~I40E_FLAG_PTP; + pf->ptp_tx = false; + pf->ptp_rx = false; + + cancel_work_sync(&pf->ptp_tx_work); + if (pf->ptp_tx_skb) { + dev_kfree_skb_any(pf->ptp_tx_skb); + pf->ptp_tx_skb = NULL; + } + + if (pf->ptp_clock) { + ptp_clock_unregister(pf->ptp_clock); + pf->ptp_clock = NULL; + dev_info(&pf->pdev->dev, "%s: removed PHC on %s\n", __func__, + pf->vsi[pf->lan_vsi]->netdev->name); + } +} diff --git a/drivers/net/ethernet/intel/i40e/i40e_txrx.c b/drivers/net/ethernet/intel/i40e/i40e_txrx.c index 946d8b1d9a4d..a089ac19cfe9 100644 --- a/drivers/net/ethernet/intel/i40e/i40e_txrx.c +++ b/drivers/net/ethernet/intel/i40e/i40e_txrx.c @@ -1088,6 +1088,13 @@ static int i40e_clean_rx_irq(struct i40e_ring *rx_ring, int budget) } skb->rxhash = i40e_rx_hash(rx_ring, rx_desc); + if (unlikely(rx_status & I40E_RXD_QW1_STATUS_TSYNVALID_MASK)) { + i40e_ptp_rx_hwtstamp(vsi->back, skb, (rx_status & + I40E_RXD_QW1_STATUS_TSYNINDX_MASK) >> + I40E_RXD_QW1_STATUS_TSYNINDX_SHIFT); + rx_ring->last_rx_timestamp = jiffies; + } + /* probably a little skewed due to removing CRC */ total_rx_bytes += skb->len; total_rx_packets++; @@ -1426,6 +1433,46 @@ static int i40e_tso(struct i40e_ring *tx_ring, struct sk_buff *skb, } /** + * i40e_tsyn - set up the tsyn context descriptor + * @tx_ring: ptr to the ring to send + * @skb: ptr to the skb we're sending + * @tx_flags: the collected send information + * + * Returns 0 if no Tx timestamp can happen and 1 if the timestamp will happen + **/ +static int i40e_tsyn(struct i40e_ring *tx_ring, struct sk_buff *skb, + u32 tx_flags, u64 *cd_type_cmd_tso_mss) +{ + struct i40e_pf *pf; + + if (likely(!(skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP))) + return 0; + + /* Tx timestamps cannot be sampled when doing TSO */ + if (tx_flags & I40E_TX_FLAGS_TSO) + return 0; + + /* only timestamp the outbound packet if the user has requested it and + * we are not already transmitting a packet to be timestamped + */ + pf = i40e_netdev_to_pf(tx_ring->netdev); + if (pf->ptp_tx && !pf->ptp_tx_skb) { + skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS; + pf->ptp_tx_skb = skb_get(skb); + } else { + return 0; + } + + *cd_type_cmd_tso_mss |= (u64)I40E_TX_CTX_DESC_TSYN << + I40E_TXD_CTX_QW1_CMD_SHIFT; + + pf->ptp_tx_start = jiffies; + schedule_work(&pf->ptp_tx_work); + + return 1; +} + +/** * i40e_tx_enable_csum - Enable Tx checksum offloads * @skb: send buffer * @tx_flags: Tx flags currently set @@ -1801,6 +1848,7 @@ static netdev_tx_t i40e_xmit_frame_ring(struct sk_buff *skb, __be16 protocol; u32 td_cmd = 0; u8 hdr_len = 0; + int tsyn; int tso; if (0 == i40e_xmit_descriptor_count(skb, tx_ring)) return NETDEV_TX_BUSY; @@ -1831,6 +1879,11 @@ static netdev_tx_t i40e_xmit_frame_ring(struct sk_buff *skb, skb_tx_timestamp(skb); + tsyn = i40e_tsyn(tx_ring, skb, tx_flags, &cd_type_cmd_tso_mss); + + if (tsyn) + tx_flags |= I40E_TX_FLAGS_TSYN; + /* always enable CRC insertion offload */ td_cmd |= I40E_TX_DESC_CMD_ICRC; diff --git a/drivers/net/ethernet/intel/i40e/i40e_txrx.h b/drivers/net/ethernet/intel/i40e/i40e_txrx.h index 93b8642d77cd..d5349698e513 100644 --- a/drivers/net/ethernet/intel/i40e/i40e_txrx.h +++ b/drivers/net/ethernet/intel/i40e/i40e_txrx.h @@ -136,6 +136,7 @@ enum i40e_dyn_idx_t { #define I40E_TX_FLAGS_IPV6 (u32)(1 << 5) #define I40E_TX_FLAGS_FCCRC (u32)(1 << 6) #define I40E_TX_FLAGS_FSO (u32)(1 << 7) +#define I40E_TX_FLAGS_TSYN (u32)(1 << 8) #define I40E_TX_FLAGS_VLAN_MASK 0xffff0000 #define I40E_TX_FLAGS_VLAN_PRIO_MASK 0xe0000000 #define I40E_TX_FLAGS_VLAN_PRIO_SHIFT 29 @@ -248,6 +249,8 @@ struct i40e_ring { u8 atr_sample_rate; u8 atr_count; + unsigned long last_rx_timestamp; + bool ring_active; /* is ring online or not */ /* stats structs */ |