The SMA/U.FL pin redesign (commit 2dd5d03c77e2 ("ice: redesign dpll
sma/u.fl pins control")) introduced software-controlled pins that wrap
backing CGU input/output pins, but never updated the notification and
data paths to propagate pin events to these SW wrappers.
There are three problems:
1) ice_dpll_notify_changes() sends dpll_pin_change_ntf() only for the
direct CGU input pin stored in d->active_input. When the active
input changes, SW pins (SMA/U.FL) that wrap the old or new active
input never receive a change notification. As a result, userspace
consumers such as synce4l that monitor SMA pins via dpll netlink
never learn when the pin state transitions (e.g. from SELECTABLE to
CONNECTED).
2) ice_dpll_phase_offset_get() returns p->phase_offset for non-active
SW pins, but this field is never updated for SW pins. The PPS phase
offset monitor updates the backing CGU input's phase_offset
(p->input->phase_offset), not the SW pin's own field. As a result
non-active SW pins always report zero phase offset even when the
backing CGU input has valid PPS measurements.
3) ice_dpll_pins_notify_mask() does not propagate phase offset change
notifications to SW pins either. When a HW CGU pin gets a phase
offset change notification, the SMA/U.FL pin wrapping it is never
notified, so userspace consumers (ts2phc, synce4l) monitoring SW
pins via dpll netlink never receive phase offset updates.
Fix all three by:
- In ice_dpll_phase_offset_get(), return the backing CGU input's
phase_offset for input-direction SW pins instead of the SW pin's own
(always zero) field.
- Introduce ice_dpll_pin_ntf(), a thin wrapper around
dpll_pin_change_ntf() that also sends notifications to any
registered SMA/U.FL pin whose backing CGU input matches. Replace
all direct dpll_pin_change_ntf() calls in the periodic notification
paths with ice_dpll_pin_ntf(), so SW pins are automatically notified
whenever their backing HW pin is.
Fixes: 2dd5d03c77e2 ("ice: redesign dpll sma/u.fl pins control")
Signed-off-by: Petr Oros <[email protected]>
---
v4:
- expanded scope to also fix phase offset reporting and phase offset
notifications for SW pins (problems 2 and 3 above)
- replaced ice_dpll_sw_pin_needs_notify() with ice_dpll_pin_ntf(),
a unified wrapper that covers all notification paths
- squashed into a single patch
v3: https://lore.kernel.org/all/[email protected]/
- added kdoc for ice_dpll_sw_pin_needs_notify() helper
v2: https://lore.kernel.org/all/[email protected]/
- extracted ice_dpll_sw_pin_needs_notify() helper for readability
- moved loop variable into for() scope
v1: https://lore.kernel.org/all/[email protected]/
---
drivers/net/ethernet/intel/ice/ice_dpll.c | 47 +++++++++++++++++------
1 file changed, 36 insertions(+), 11 deletions(-)
diff --git a/drivers/net/ethernet/intel/ice/ice_dpll.c
b/drivers/net/ethernet/intel/ice/ice_dpll.c
index 62f75701d65205..5cfa19da099bfc 100644
--- a/drivers/net/ethernet/intel/ice/ice_dpll.c
+++ b/drivers/net/ethernet/intel/ice/ice_dpll.c
@@ -1915,7 +1915,10 @@ ice_dpll_phase_offset_get(const struct dpll_pin *pin,
void *pin_priv,
d->active_input == p->input->pin))
*phase_offset = d->phase_offset * ICE_DPLL_PHASE_OFFSET_FACTOR;
else if (d->phase_offset_monitor_period)
- *phase_offset = p->phase_offset * ICE_DPLL_PHASE_OFFSET_FACTOR;
+ *phase_offset = (p->input &&
+ p->direction == DPLL_PIN_DIRECTION_INPUT ?
+ p->input->phase_offset :
+ p->phase_offset) *
ICE_DPLL_PHASE_OFFSET_FACTOR;
else
*phase_offset = 0;
mutex_unlock(&pf->dplls.lock);
@@ -2609,6 +2612,27 @@ static u64 ice_generate_clock_id(struct ice_pf *pf)
return pci_get_dsn(pf->pdev);
}
+/**
+ * ice_dpll_pin_ntf - notify pin change including any SW pin wrappers
+ * @dplls: pointer to dplls struct
+ * @pin: the dpll_pin that changed
+ *
+ * Send a change notification for @pin and for any registered SMA/U.FL pin
+ * whose backing CGU input matches @pin.
+ */
+static void ice_dpll_pin_ntf(struct ice_dplls *dplls, struct dpll_pin *pin)
+{
+ dpll_pin_change_ntf(pin);
+ for (int i = 0; i < ICE_DPLL_PIN_SW_NUM; i++) {
+ if (dplls->sma[i].pin && dplls->sma[i].input &&
+ dplls->sma[i].input->pin == pin)
+ dpll_pin_change_ntf(dplls->sma[i].pin);
+ if (dplls->ufl[i].pin && dplls->ufl[i].input &&
+ dplls->ufl[i].input->pin == pin)
+ dpll_pin_change_ntf(dplls->ufl[i].pin);
+ }
+}
+
/**
* ice_dpll_notify_changes - notify dpll subsystem about changes
* @d: pointer do dpll
@@ -2617,6 +2641,7 @@ static u64 ice_generate_clock_id(struct ice_pf *pf)
*/
static void ice_dpll_notify_changes(struct ice_dpll *d)
{
+ struct ice_dplls *dplls = &d->pf->dplls;
bool pin_notified = false;
if (d->prev_dpll_state != d->dpll_state) {
@@ -2625,17 +2650,17 @@ static void ice_dpll_notify_changes(struct ice_dpll *d)
}
if (d->prev_input != d->active_input) {
if (d->prev_input)
- dpll_pin_change_ntf(d->prev_input);
+ ice_dpll_pin_ntf(dplls, d->prev_input);
d->prev_input = d->active_input;
if (d->active_input) {
- dpll_pin_change_ntf(d->active_input);
+ ice_dpll_pin_ntf(dplls, d->active_input);
pin_notified = true;
}
}
if (d->prev_phase_offset != d->phase_offset) {
d->prev_phase_offset = d->phase_offset;
if (!pin_notified && d->active_input)
- dpll_pin_change_ntf(d->active_input);
+ ice_dpll_pin_ntf(dplls, d->active_input);
}
}
@@ -2664,6 +2689,7 @@ static bool ice_dpll_is_pps_phase_monitor(struct ice_pf
*pf)
/**
* ice_dpll_pins_notify_mask - notify dpll subsystem about bulk pin changes
+ * @dplls: pointer to dplls struct
* @pins: array of ice_dpll_pin pointers registered within dpll subsystem
* @pin_num: number of pins
* @phase_offset_ntf_mask: bitmask of pin indexes to notify
@@ -2673,15 +2699,14 @@ static bool ice_dpll_is_pps_phase_monitor(struct ice_pf
*pf)
*
* Context: Must be called while pf->dplls.lock is released.
*/
-static void ice_dpll_pins_notify_mask(struct ice_dpll_pin *pins,
+static void ice_dpll_pins_notify_mask(struct ice_dplls *dplls,
+ struct ice_dpll_pin *pins,
u8 pin_num,
u32 phase_offset_ntf_mask)
{
- int i = 0;
-
- for (i = 0; i < pin_num; i++)
- if (phase_offset_ntf_mask & (1 << i))
- dpll_pin_change_ntf(pins[i].pin);
+ for (int i = 0; i < pin_num; i++)
+ if (phase_offset_ntf_mask & BIT(i))
+ ice_dpll_pin_ntf(dplls, pins[i].pin);
}
/**
@@ -2857,7 +2882,7 @@ static void ice_dpll_periodic_work(struct kthread_work
*work)
ice_dpll_notify_changes(de);
ice_dpll_notify_changes(dp);
if (phase_offset_ntf)
- ice_dpll_pins_notify_mask(d->inputs, d->num_inputs,
+ ice_dpll_pins_notify_mask(d, d->inputs, d->num_inputs,
phase_offset_ntf);
resched:
--
2.52.0
