/* 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, 25Gb, or no link, the period is 1.6ns. * At 10Gb or 5Gb 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_MULT 2 #define I40E_PTP_5GB_INCVAL_MULT 2 #define I40E_PTP_1GB_INCVAL_MULT 20 #define I40E_ISGN 0x80000000
/* Event time is captured by one of the two matched registers * PRTTSYN_EVNT_L: 32 LSB of sampled time event * PRTTSYN_EVNT_H: 32 MSB of sampled time event * Event is defined in PRTTSYN_EVNT_0 register
*/
lo = rd32(hw, I40E_PRTTSYN_EVNT_L(0));
hi = rd32(hw, I40E_PRTTSYN_EVNT_H(0));
/** * i40e_can_set_pins - check possibility of manipulating the pins * @pf: board private structure * * Check if all conditions are satisfied to manipulate PTP pins. * Return CAN_SET_PINS if pins can be set on a specific PF or * return CAN_DO_PINS if pins can be manipulated within a NIC or * return CANT_DO_PINS otherwise.
**/ staticenum i40e_can_set_pins i40e_can_set_pins(struct i40e_pf *pf)
{ if (!i40e_is_ptp_pin_dev(&pf->hw)) {
dev_warn(&pf->pdev->dev, "PTP external clock not supported.\n"); return CANT_DO_PINS;
}
if (!pf->ptp_pins) {
dev_warn(&pf->pdev->dev, "PTP PIN manipulation not allowed.\n"); return CANT_DO_PINS;
}
if (pf->hw.pf_id) {
dev_warn(&pf->pdev->dev, "PTP PINs should be accessed via PF0.\n"); return CAN_DO_PINS;
}
return CAN_SET_PINS;
}
/** * i40_ptp_reset_timing_events - Reset PTP timing events * @pf: Board private structure * * This function resets timing events for pf.
**/ staticvoid i40_ptp_reset_timing_events(struct i40e_pf *pf)
{
u32 i;
spin_lock_bh(&pf->ptp_rx_lock); for (i = 0; i <= I40E_PRTTSYN_RXTIME_L_MAX_INDEX; i++) { /* reading and automatically clearing timing events registers */
rd32(&pf->hw, I40E_PRTTSYN_RXTIME_L(i));
rd32(&pf->hw, I40E_PRTTSYN_RXTIME_H(i));
pf->latch_events[i] = 0;
} /* reading and automatically clearing timing events registers */
rd32(&pf->hw, I40E_PRTTSYN_TXTIME_L);
rd32(&pf->hw, I40E_PRTTSYN_TXTIME_H);
/** * i40e_ptp_verify - check pins * @ptp: ptp clock * @pin: pin index * @func: assigned function * @chan: channel * * Check pins consistency. * Return 0 on success or error on failure.
**/ staticint i40e_ptp_verify(struct ptp_clock_info *ptp, unsignedint pin, enum ptp_pin_function func, unsignedint chan)
{ switch (func) { case PTP_PF_NONE: case PTP_PF_EXTTS: case PTP_PF_PEROUT: break; case PTP_PF_PHYSYNC: return -EOPNOTSUPP;
} return 0;
}
/** * i40e_ptp_read - Read the PHC time from the device * @pf: Board private structure * @ts: timespec structure to hold the current time value * @sts: structure to hold the system time before and after reading the PHC * * 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.
**/ staticvoid i40e_ptp_read(struct i40e_pf *pf, struct timespec64 *ts, struct ptp_system_timestamp *sts)
{ struct i40e_hw *hw = &pf->hw;
u32 hi, lo;
u64 ns;
/* The timer latches on the lowest register read. */
ptp_read_system_prets(sts);
lo = rd32(hw, I40E_PRTTSYN_TIME_L);
ptp_read_system_postts(sts);
hi = rd32(hw, I40E_PRTTSYN_TIME_H);
ns = (((u64)hi) << 32) | lo;
*ts = ns_to_timespec64(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.
**/ staticvoid i40e_ptp_write(struct i40e_pf *pf, conststruct timespec64 *ts)
{ struct i40e_hw *hw = &pf->hw;
u64 ns = timespec64_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.
**/ staticvoid 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_adjfine - Adjust the PHC frequency * @ptp: The PTP clock structure * @scaled_ppm: Scaled parts per million adjustment from base * * Adjust the frequency of the PHC by the indicated delta from the base * frequency. * * Scaled parts per million is ppm with a 16 bit binary fractional field.
**/ staticint i40e_ptp_adjfine(struct ptp_clock_info *ptp, long scaled_ppm)
{ struct i40e_pf *pf = container_of(ptp, struct i40e_pf, ptp_caps); struct i40e_hw *hw = &pf->hw;
u64 adj, base_adj;
smp_mb(); /* Force any pending update before accessing. */
base_adj = I40E_PTP_40GB_INCVAL * READ_ONCE(pf->ptp_adj_mult);
/** * i40e_ptp_adjtime - Adjust the PHC time * @ptp: The PTP clock structure * @delta: Offset in nanoseconds to adjust the PHC time by * * Adjust the current clock time by a delta specified in nanoseconds.
**/ staticint i40e_ptp_adjtime(struct ptp_clock_info *ptp, s64 delta)
{ struct i40e_pf *pf = container_of(ptp, struct i40e_pf, ptp_caps); struct i40e_hw *hw = &pf->hw;
mutex_lock(&pf->tmreg_lock);
if (delta > -999999900LL && delta < 999999900LL) { int neg_adj = 0;
u32 timadj;
u64 tohw;
then = ns_to_timespec64(delta);
i40e_ptp_read(pf, &now, NULL);
now = timespec64_add(now, then);
i40e_ptp_write(pf, (conststruct timespec64 *)&now);
i40e_ptp_set_1pps_signal_hw(pf);
}
mutex_unlock(&pf->tmreg_lock);
return 0;
}
/** * i40e_ptp_gettimex - Get the time of the PHC * @ptp: The PTP clock structure * @ts: timespec structure to hold the current time value * @sts: structure to hold the system time before and after reading the PHC * * Read the device clock and return the correct value on ns, after converting it * into a timespec struct.
**/ staticint i40e_ptp_gettimex(struct ptp_clock_info *ptp, struct timespec64 *ts, struct ptp_system_timestamp *sts)
{ struct i40e_pf *pf = container_of(ptp, struct i40e_pf, ptp_caps);
/** * i40e_ptp_settime - Set the time of the PHC * @ptp: The PTP clock structure * @ts: timespec64 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.
**/ staticint i40e_ptp_settime(struct ptp_clock_info *ptp, conststruct timespec64 *ts)
{ struct i40e_pf *pf = container_of(ptp, struct i40e_pf, ptp_caps);
/** * i40e_pps_configure - configure PPS events * @ptp: ptp clock * @rq: clock request * @on: status * * Configure PPS events for external clock source. * Return 0 on success or error on failure.
**/ staticint i40e_pps_configure(struct ptp_clock_info *ptp, struct ptp_clock_request *rq, int on)
{ struct i40e_pf *pf = container_of(ptp, struct i40e_pf, ptp_caps);
if (!!on)
i40e_ptp_set_1pps_signal_hw(pf);
return 0;
}
/** * i40e_pin_state - determine PIN state * @index: PIN index * @func: function assigned to PIN * * Determine PIN state based on PIN index and function assigned. * Return PIN state.
**/ staticenum i40e_ptp_gpio_pin_state i40e_pin_state(int index, int func)
{ enum i40e_ptp_gpio_pin_state state = off;
if (index == 0 && func == PTP_PF_EXTTS)
state = in_A; if (index == 1 && func == PTP_PF_EXTTS)
state = in_B; if (index == 0 && func == PTP_PF_PEROUT)
state = out_A; if (index == 1 && func == PTP_PF_PEROUT)
state = out_B;
return state;
}
/** * i40e_ptp_enable_pin - enable PINs. * @pf: private board structure * @chan: channel * @func: PIN function * @on: state * * Enable PTP pins for external clock source. * Return 0 on success or error code on failure.
**/ staticint i40e_ptp_enable_pin(struct i40e_pf *pf, unsignedint chan, enum ptp_pin_function func, int on)
{ enum i40e_ptp_gpio_pin_state *pin = NULL; struct i40e_ptp_pins_settings pins; int pin_index;
/* Use PF0 to set pins. Return success for user space tools */ if (pf->hw.pf_id) return 0;
/* Preserve previous state of pins that we don't touch */
pins.sdp3_2 = pf->ptp_pins->sdp3_2;
pins.sdp3_3 = pf->ptp_pins->sdp3_3;
pins.gpio_4 = pf->ptp_pins->gpio_4;
/* To turn on the pin - find the corresponding one based on * the given index. To turn the function off - find * which pin had it assigned. Don't use ptp_find_pin here * because it tries to lock the pincfg_mux which is locked by * ptp_pin_store() that calls here.
*/ if (on) {
pin_index = ptp_find_pin(pf->ptp_clock, func, chan); if (pin_index < 0) return -EBUSY;
switch (pin_index) { case SDP3_2:
pin = &pins.sdp3_2; break; case SDP3_3:
pin = &pins.sdp3_3; break; case GPIO_4:
pin = &pins.gpio_4; break; default: return -EINVAL;
}
/* TODO: Implement flags handling for EXTTS and PEROUT */ switch (rq->type) { case PTP_CLK_REQ_EXTTS:
func = PTP_PF_EXTTS;
chan = rq->extts.index; break; case PTP_CLK_REQ_PEROUT:
func = PTP_PF_PEROUT;
chan = rq->perout.index; break; case PTP_CLK_REQ_PPS: return i40e_pps_configure(ptp, rq, on); default: return -EOPNOTSUPP;
}
return i40e_ptp_enable_pin(pf, chan, func, on);
}
/** * i40e_ptp_get_rx_events - Read I40E_PRTTSYN_STAT_1 and latch events * @pf: the PF data structure * * This function reads I40E_PRTTSYN_STAT_1 and updates the corresponding timers * for noticed latch events. This allows the driver to keep track of the first * time a latch event was noticed which will be used to help clear out Rx * timestamps for packets that got dropped or lost. * * This function will return the current value of I40E_PRTTSYN_STAT_1 and is * expected to be called only while under the ptp_rx_lock.
**/ static u32 i40e_ptp_get_rx_events(struct i40e_pf *pf)
{ struct i40e_hw *hw = &pf->hw;
u32 prttsyn_stat, new_latch_events; int i;
/* Update the jiffies time for any newly latched timestamp. This * ensures that we store the time that we first discovered a timestamp * was latched by the hardware. The service task will later determine * if we should free the latch and drop that timestamp should too much * time pass. This flow ensures that we only update jiffies for new * events latched since the last time we checked, and not all events * currently latched, so that the service task accounting remains * accurate.
*/ for (i = 0; i < 4; i++) { if (new_latch_events & BIT(i))
pf->latch_events[i] = jiffies;
}
/* Finally, we store the current status of the Rx timestamp latches */
pf->latch_event_flags = prttsyn_stat;
return prttsyn_stat;
}
/** * i40e_ptp_rx_hang - Detect error case when Rx timestamp registers are hung * @pf: The PF private data 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 i40e_ptp_rx_hang(struct i40e_pf *pf)
{ struct i40e_hw *hw = &pf->hw; unsignedint i, cleared = 0;
/* Since we cannot turn off the Rx timestamp logic if the device is * configured for Tx timestamping, we check if Rx timestamping is * configured. We don't want to spuriously warn about Rx timestamp * hangs if we don't care about the timestamps.
*/ if (!test_bit(I40E_FLAG_PTP_ENA, pf->flags) || !pf->ptp_rx) return;
spin_lock_bh(&pf->ptp_rx_lock);
/* Update current latch times for Rx events */
i40e_ptp_get_rx_events(pf);
/* Check all the currently latched Rx events and see whether they have * been latched for over a second. It is assumed that any timestamp * should have been cleared within this time, or else it was captured * for a dropped frame that the driver never received. Thus, we will * clear any timestamp that has been latched for over 1 second.
*/ for (i = 0; i < 4; i++) { if ((pf->latch_event_flags & BIT(i)) &&
time_is_before_jiffies(pf->latch_events[i] + HZ)) {
rd32(hw, I40E_PRTTSYN_RXTIME_H(i));
pf->latch_event_flags &= ~BIT(i);
cleared++;
}
}
spin_unlock_bh(&pf->ptp_rx_lock);
/* Log a warning if more than 2 timestamps got dropped in the same * check. We don't want to warn about all drops because it can occur * in normal scenarios such as PTP frames on multicast addresses we * aren't listening to. However, administrator should know if this is * the reason packets aren't receiving timestamps.
*/ if (cleared > 2)
dev_dbg(&pf->pdev->dev, "Dropped %d missed RXTIME timestamp events\n",
cleared);
/** * i40e_ptp_tx_hang - Detect error case when Tx timestamp register is hung * @pf: The PF private data structure * * This watchdog task is run periodically to make sure that we clear the Tx * timestamp logic if we don't obtain a timestamp in a reasonable amount of * time. It is unexpected in the normal case but if it occurs it results in * permanently preventing timestamps of future packets.
**/ void i40e_ptp_tx_hang(struct i40e_pf *pf)
{ struct sk_buff *skb;
if (!test_bit(I40E_FLAG_PTP_ENA, pf->flags) || !pf->ptp_tx) return;
/* Nothing to do if we're not already waiting for a timestamp */ if (!test_bit(__I40E_PTP_TX_IN_PROGRESS, pf->state)) return;
/* We already have a handler routine which is run when we are notified * of a Tx timestamp in the hardware. If we don't get an interrupt * within a second it is reasonable to assume that we never will.
*/ if (time_is_before_jiffies(pf->ptp_tx_start + HZ)) {
skb = pf->ptp_tx_skb;
pf->ptp_tx_skb = NULL;
clear_bit_unlock(__I40E_PTP_TX_IN_PROGRESS, pf->state);
/* Free the skb after we clear the bitlock */
dev_kfree_skb_any(skb);
pf->tx_hwtstamp_timeouts++;
}
}
/** * 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 sk_buff *skb = pf->ptp_tx_skb; struct i40e_hw *hw = &pf->hw;
u32 hi, lo;
u64 ns;
if (!test_bit(I40E_FLAG_PTP_ENA, pf->flags) || !pf->ptp_tx) return;
/* don't attempt to timestamp if we don't have an skb */ if (!pf->ptp_tx_skb) return;
lo = rd32(hw, I40E_PRTTSYN_TXTIME_L);
hi = rd32(hw, I40E_PRTTSYN_TXTIME_H);
/* Clear the bit lock as soon as possible after reading the register, * and prior to notifying the stack via skb_tstamp_tx(). Otherwise * applications might wake up and attempt to request another transmit * timestamp prior to the bit lock being cleared.
*/
pf->ptp_tx_skb = NULL;
clear_bit_unlock(__I40E_PTP_TX_IN_PROGRESS, pf->state);
/* Notify the stack and free the skb after we've unlocked */
skb_tstamp_tx(skb, &shhwtstamps);
dev_kfree_skb_any(skb);
}
/** * 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 (!test_bit(I40E_FLAG_PTP_ENA, pf->flags) || !pf->ptp_rx) return;
hw = &pf->hw;
spin_lock_bh(&pf->ptp_rx_lock);
/* Get current Rx events and update latch times */
prttsyn_stat = i40e_ptp_get_rx_events(pf);
/* TODO: Should we warn about missing Rx timestamp event? */ if (!(prttsyn_stat & BIT(index))) {
spin_unlock_bh(&pf->ptp_rx_lock); return;
}
/* Clear the latched event since we're about to read its register */
pf->latch_event_flags &= ~BIT(index);
lo = rd32(hw, I40E_PRTTSYN_RXTIME_L(index));
hi = rd32(hw, I40E_PRTTSYN_RXTIME_H(index));
/** * 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;
u32 mult;
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:
mult = I40E_PTP_10GB_INCVAL_MULT; break; case I40E_LINK_SPEED_5GB:
mult = I40E_PTP_5GB_INCVAL_MULT; break; case I40E_LINK_SPEED_1GB:
mult = I40E_PTP_1GB_INCVAL_MULT; break; case I40E_LINK_SPEED_100MB:
{ staticint warn_once;
if (!warn_once) {
dev_warn(&pf->pdev->dev, "1588 functionality is not supported at 100 Mbps. Stopping the PHC.\n");
warn_once++;
}
mult = 0; break;
} case I40E_LINK_SPEED_40GB: default:
mult = 1; break;
}
/* The increment value is calculated by taking the base 40GbE incvalue * and multiplying it by a factor based on the link speed.
*/
incval = I40E_PTP_40GB_INCVAL * mult;
/* 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. */
WRITE_ONCE(pf->ptp_adj_mult, mult);
smp_mb(); /* Force the above update. */
}
/** * i40e_ptp_hwtstamp_get - interface to read the HW timestamping * @netdev: Network device structure * @config: Timestamping configuration structure * * 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_hwtstamp_get(struct net_device *netdev, struct kernel_hwtstamp_config *config)
{ struct i40e_netdev_priv *np = netdev_priv(netdev); struct i40e_pf *pf = np->vsi->back;
if (!test_bit(I40E_FLAG_PTP_ENA, pf->flags)) return -EOPNOTSUPP;
*config = pf->tstamp_config;
return 0;
}
/** * i40e_ptp_free_pins - free memory used by PTP pins * @pf: Board private structure * * Release memory allocated for PTP pins.
**/ staticvoid i40e_ptp_free_pins(struct i40e_pf *pf)
{ if (i40e_is_ptp_pin_dev(&pf->hw)) {
kfree(pf->ptp_pins);
kfree(pf->ptp_caps.pin_config);
pf->ptp_pins = NULL;
}
}
/** * i40e_ptp_set_pin_hw - Set HW GPIO pin * @hw: pointer to the hardware structure * @pin: pin index * @state: pin state * * Set status of GPIO pin for external clock handling.
**/ staticvoid i40e_ptp_set_pin_hw(struct i40e_hw *hw, unsignedint pin, enum i40e_ptp_gpio_pin_state state)
{ switch (state) { case off:
wr32(hw, I40E_GLGEN_GPIO_CTL(pin), 0); break; case in_A:
wr32(hw, I40E_GLGEN_GPIO_CTL(pin),
I40E_GLGEN_GPIO_CTL_PORT_0_IN_TIMESYNC_0); break; case in_B:
wr32(hw, I40E_GLGEN_GPIO_CTL(pin),
I40E_GLGEN_GPIO_CTL_PORT_1_IN_TIMESYNC_0); break; case out_A:
wr32(hw, I40E_GLGEN_GPIO_CTL(pin),
I40E_GLGEN_GPIO_CTL_PORT_0_OUT_TIMESYNC_1); break; case out_B:
wr32(hw, I40E_GLGEN_GPIO_CTL(pin),
I40E_GLGEN_GPIO_CTL_PORT_1_OUT_TIMESYNC_1); break; default: break;
}
}
/** * i40e_ptp_set_led_hw - Set HW GPIO led * @hw: pointer to the hardware structure * @led: led index * @state: led state * * Set status of GPIO led for external clock handling.
**/ staticvoid i40e_ptp_set_led_hw(struct i40e_hw *hw, unsignedint led, enum i40e_ptp_led_pin_state state)
{ switch (state) { case low:
wr32(hw, I40E_GLGEN_GPIO_SET,
I40E_GLGEN_GPIO_SET_DRV_SDP_DATA | led); break; case high:
wr32(hw, I40E_GLGEN_GPIO_SET,
I40E_GLGEN_GPIO_SET_DRV_SDP_DATA |
I40E_GLGEN_GPIO_SET_SDP_DATA_HI | led); break; default: break;
}
}
/** * i40e_ptp_init_leds_hw - init LEDs * @hw: pointer to a hardware structure * * Set initial state of LEDs
**/ staticvoid i40e_ptp_init_leds_hw(struct i40e_hw *hw)
{
wr32(hw, I40E_GLGEN_GPIO_CTL(I40E_LED2_0),
I40E_GLGEN_GPIO_CTL_LED_INIT);
wr32(hw, I40E_GLGEN_GPIO_CTL(I40E_LED2_1),
I40E_GLGEN_GPIO_CTL_LED_INIT);
wr32(hw, I40E_GLGEN_GPIO_CTL(I40E_LED3_0),
I40E_GLGEN_GPIO_CTL_LED_INIT);
wr32(hw, I40E_GLGEN_GPIO_CTL(I40E_LED3_1),
I40E_GLGEN_GPIO_CTL_LED_INIT);
}
/** * i40e_ptp_set_pins_hw - Set HW GPIO pins * @pf: Board private structure * * This function sets GPIO pins for PTP
**/ staticvoid i40e_ptp_set_pins_hw(struct i40e_pf *pf)
{ conststruct i40e_ptp_pins_settings *pins = pf->ptp_pins; struct i40e_hw *hw = &pf->hw;
/* pin must be disabled before it may be used */
i40e_ptp_set_pin_hw(hw, I40E_SDP3_2, off);
i40e_ptp_set_pin_hw(hw, I40E_SDP3_3, off);
i40e_ptp_set_pin_hw(hw, I40E_GPIO_4, off);
dev_info(&pf->pdev->dev, "PTP configuration set to: SDP3_2: %s, SDP3_3: %s, GPIO_4: %s.\n",
i40e_ptp_gpio_pin_state2str[pins->sdp3_2],
i40e_ptp_gpio_pin_state2str[pins->sdp3_3],
i40e_ptp_gpio_pin_state2str[pins->gpio_4]);
}
/** * i40e_ptp_set_pins - set PTP pins in HW * @pf: Board private structure * @pins: PTP pins to be applied * * Validate and set PTP pins in HW for specific PF. * Return 0 on success or negative value on error.
**/ staticint i40e_ptp_set_pins(struct i40e_pf *pf, struct i40e_ptp_pins_settings *pins)
{ enum i40e_can_set_pins pin_caps = i40e_can_set_pins(pf); int i = 0;
/** * i40e_ptp_set_timestamp_mode - setup hardware for requested timestamp mode * @pf: Board private structure * @config: hwtstamp settings requested or saved * * Control hardware registers to enter the specific mode requested by the * user. Also used during reset path to ensure that timestamp settings are * maintained. * * Note: modifies config in place, and may update the requested mode to be * more broad if the specific filter is not directly supported.
**/ staticint i40e_ptp_set_timestamp_mode(struct i40e_pf *pf, struct kernel_hwtstamp_config *config)
{ struct i40e_hw *hw = &pf->hw;
u32 tsyntype, regval;
/* Selects external trigger to cause event */
regval = rd32(hw, I40E_PRTTSYN_AUX_0(0)); /* Bit 17:16 is EVNTLVL, 01B rising edge */
regval &= 0;
regval |= (1 << I40E_PRTTSYN_AUX_0_EVNTLVL_SHIFT); /* regval: 0001 0000 0000 0000 0000 */
wr32(hw, I40E_PRTTSYN_AUX_0(0), regval);
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; /* We set the type to V1, but do not enable UDP packet * recognition. In this way, we should be as close to * disabling PTP Rx timestamps as possible since V1 packets * are always UDP, since L2 packets are a V2 feature.
*/
tsyntype = I40E_PRTTSYN_CTL1_TSYNTYPE_V1; break; case HWTSTAMP_FILTER_PTP_V1_L4_SYNC: case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ: case HWTSTAMP_FILTER_PTP_V1_L4_EVENT: if (!test_bit(I40E_HW_CAP_PTP_L4, pf->hw.caps)) return -ERANGE;
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_L4_EVENT: case HWTSTAMP_FILTER_PTP_V2_SYNC: case HWTSTAMP_FILTER_PTP_V2_L4_SYNC: case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ: case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ: if (!test_bit(I40E_HW_CAP_PTP_L4, pf->hw.caps)) return -ERANGE;
fallthrough; case HWTSTAMP_FILTER_PTP_V2_L2_EVENT: case HWTSTAMP_FILTER_PTP_V2_L2_SYNC: case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ:
pf->ptp_rx = true;
tsyntype = I40E_PRTTSYN_CTL1_V2MESSTYPE0_MASK |
I40E_PRTTSYN_CTL1_TSYNTYPE_V2; if (test_bit(I40E_HW_CAP_PTP_L4, pf->hw.caps)) {
tsyntype |= I40E_PRTTSYN_CTL1_UDP_ENA_MASK;
config->rx_filter = HWTSTAMP_FILTER_PTP_V2_EVENT;
} else {
config->rx_filter = HWTSTAMP_FILTER_PTP_V2_L2_EVENT;
} break; case HWTSTAMP_FILTER_NTP_ALL: case HWTSTAMP_FILTER_ALL: default: return -ERANGE;
}
/* Clear out all 1588-related registers to clear and unlatch them. */
spin_lock_bh(&pf->ptp_rx_lock);
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));
pf->latch_event_flags = 0;
spin_unlock_bh(&pf->ptp_rx_lock);
/* 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);
/* Although there is no simple on/off switch for Rx, we "disable" Rx * timestamps by setting to V1 only mode and clear the UDP * recognition. This ought to disable all PTP Rx timestamps as V1 * packets are always over UDP. Note that software is configured to * ignore Rx timestamps via the pf->ptp_rx flag.
*/
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 0;
}
/** * i40e_ptp_hwtstamp_set - interface to control the HW timestamping * @netdev: Network device structure * @config: Timestamping configuration structure * @extack: Netlink extended ack structure for error reporting * * 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_hwtstamp_set(struct net_device *netdev, struct kernel_hwtstamp_config *config, struct netlink_ext_ack *extack)
{ struct i40e_netdev_priv *np = netdev_priv(netdev); struct i40e_pf *pf = np->vsi->back; int err;
if (!test_bit(I40E_FLAG_PTP_ENA, pf->flags)) return -EOPNOTSUPP;
err = i40e_ptp_set_timestamp_mode(pf, config); if (err) return err;
/* save these settings for future reference */
pf->tstamp_config = *config;
return 0;
}
/** * i40e_init_pin_config - initialize pins. * @pf: private board structure * * Initialize pins for external clock source. * Return 0 on success or error code on failure.
**/ staticint i40e_init_pin_config(struct i40e_pf *pf)
{ int i;
/** * i40e_ptp_create_clock - Create PTP clock device for userspace * @pf: Board private structure * * This function creates a new PTP clock device. It only creates one if we * don't already have one, so it is safe to call. Will return error if it * can't create one, but success if we already have a device. Should be used * by i40e_ptp_init to create clock initially, and prevent global resets from * creating new clock devices.
**/ staticlong i40e_ptp_create_clock(struct i40e_pf *pf)
{ /* no need to create a clock device if we already have one */ if (!IS_ERR_OR_NULL(pf->ptp_clock)) return 0;
/* 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)) return PTR_ERR(pf->ptp_clock);
/* clear the hwtstamp settings here during clock create, instead of * during regular init, so that we can maintain settings across a * reset or suspend.
*/
pf->tstamp_config.rx_filter = HWTSTAMP_FILTER_NONE;
pf->tstamp_config.tx_type = HWTSTAMP_TX_OFF;
/* Set the previous "reset" time to the current Kernel clock time */
ktime_get_real_ts64(&pf->ptp_prev_hw_time);
pf->ptp_reset_start = ktime_get();
return 0;
}
/** * i40e_ptp_save_hw_time - Save the current PTP time as ptp_prev_hw_time * @pf: Board private structure * * Read the current PTP time and save it into pf->ptp_prev_hw_time. This should * be called at the end of preparing to reset, just before hardware reset * occurs, in order to preserve the PTP time as close as possible across * resets.
*/ void i40e_ptp_save_hw_time(struct i40e_pf *pf)
{ /* don't try to access the PTP clock if it's not enabled */ if (!test_bit(I40E_FLAG_PTP_ENA, pf->flags)) return;
i40e_ptp_gettimex(&pf->ptp_caps, &pf->ptp_prev_hw_time, NULL); /* Get a monotonic starting time for this reset */
pf->ptp_reset_start = ktime_get();
}
/** * i40e_ptp_restore_hw_time - Restore the ptp_prev_hw_time + delta to PTP regs * @pf: Board private structure * * Restore the PTP hardware clock registers. We previously cached the PTP * hardware time as pf->ptp_prev_hw_time. To be as accurate as possible, * update this value based on the time delta since the time was saved, using * CLOCK_MONOTONIC (via ktime_get()) to calculate the time difference. * * This ensures that the hardware clock is restored to nearly what it should * have been if a reset had not occurred.
*/ void i40e_ptp_restore_hw_time(struct i40e_pf *pf)
{
ktime_t delta = ktime_sub(ktime_get(), pf->ptp_reset_start);
/* Update the previous HW time with the ktime delta */
timespec64_add_ns(&pf->ptp_prev_hw_time, ktime_to_ns(delta));
/* Restore the hardware clock registers */
i40e_ptp_settime(&pf->ptp_caps, &pf->ptp_prev_hw_time);
}
/** * i40e_ptp_init - Initialize the 1588 support after device probe or reset * @pf: Board private structure * * This function sets device up for 1588 support. The first time it is run, it * will create a PHC clock device. It does not create a clock device if one * already exists. It also reconfigures the device after a reset. * * The first time a clock is created, i40e_ptp_create_clock will set * pf->ptp_prev_hw_time to the current system time. During resets, it is * expected that this timespec will be set to the last known PTP clock time, * in order to preserve the clock time as close as possible across a reset.
**/ void i40e_ptp_init(struct i40e_pf *pf)
{ struct i40e_vsi *vsi = i40e_pf_get_main_vsi(pf); struct net_device *netdev = vsi->netdev; struct i40e_hw *hw = &pf->hw;
u32 pf_id; long err;
/* Only one PF is assigned to control 1588 logic per port. Do not * enable any support for PFs not assigned via PRTTSYN_CTL0.PF_ID
*/
pf_id = FIELD_GET(I40E_PRTTSYN_CTL0_PF_ID_MASK,
rd32(hw, I40E_PRTTSYN_CTL0)); if (hw->pf_id != pf_id) {
clear_bit(I40E_FLAG_PTP_ENA, pf->flags);
dev_info(&pf->pdev->dev, "%s: PTP not supported on %s\n",
__func__,
netdev->name); return;
}
/* Restore the clock time based on last known value */
i40e_ptp_restore_hw_time(pf);
}
i40e_ptp_set_1pps_signal_hw(pf);
}
/** * 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)
{ struct i40e_vsi *main_vsi = i40e_pf_get_main_vsi(pf); struct i40e_hw *hw = &pf->hw;
u32 regval;
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