Merge branch '100GbE' of git://git.kernel.org/pub/scm/linux/kernel/git/tnguy/net-queue

Tony Nguyen says:

====================
Intel Wired LAN Driver Updates 2024-02-20 (ice)

This series contains updates to ice driver only.

Yochai sets parent device to properly reflect connection state between
source DPLL and output pin.

Arkadiusz fixes additional issues related to DPLL; proper reporting of
phase_adjust value and preventing use/access of data while resetting.

Amritha resolves ASSERT_RTNL() being triggered on certain reset/rebuild
flows.

* '100GbE' of git://git.kernel.org/pub/scm/linux/kernel/git/tnguy/net-queue:
  ice: Fix ASSERT_RTNL() warning during certain scenarios
  ice: fix pin phase adjust updates on PF reset
  ice: fix dpll periodic work data updates on PF reset
  ice: fix dpll and dpll_pin data access on PF reset
  ice: fix dpll input pin phase_adjust value updates
  ice: fix connection state of DPLL and out pin
====================

Reviewed-by: Vadim Fedorenko <vadim.fedorenko@linux.dev>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Link: https://lore.kernel.org/r/20240220214444.1039759-1-anthony.l.nguyen@intel.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

5 files changed, 161 insertions, 39 deletions

diff --git a/drivers/net/ethernet/intel/ice/ice_base.c b/drivers/net/ethernet/intel/ice/ice_base.c
index 7ac847718882..c979192e44d1 100644
--- a/drivers/net/ethernet/intel/ice/ice_base.c
+++ b/drivers/net/ethernet/intel/ice/ice_base.c
@@ -190,15 +190,13 @@ static void ice_free_q_vector(struct ice_vsi *vsi, int v_idx)
 	q_vector = vsi->q_vectors[v_idx];
 
 	ice_for_each_tx_ring(tx_ring, q_vector->tx) {
-		if (vsi->netdev)
-			netif_queue_set_napi(vsi->netdev, tx_ring->q_index,
-					     NETDEV_QUEUE_TYPE_TX, NULL);
+		ice_queue_set_napi(vsi, tx_ring->q_index, NETDEV_QUEUE_TYPE_TX,
+				   NULL);
 		tx_ring->q_vector = NULL;
 	}
 	ice_for_each_rx_ring(rx_ring, q_vector->rx) {
-		if (vsi->netdev)
-			netif_queue_set_napi(vsi->netdev, rx_ring->q_index,
-					     NETDEV_QUEUE_TYPE_RX, NULL);
+		ice_queue_set_napi(vsi, rx_ring->q_index, NETDEV_QUEUE_TYPE_RX,
+				   NULL);
 		rx_ring->q_vector = NULL;
 	}
 
diff --git a/drivers/net/ethernet/intel/ice/ice_dpll.c b/drivers/net/ethernet/intel/ice/ice_dpll.c
index b9c5eced6326..adfa1f2a80a6 100644
--- a/drivers/net/ethernet/intel/ice/ice_dpll.c
+++ b/drivers/net/ethernet/intel/ice/ice_dpll.c
@@ -31,6 +31,26 @@ static const char * const pin_type_name[] = {
 };
 
 /**
+ * ice_dpll_is_reset - check if reset is in progress
+ * @pf: private board structure
+ * @extack: error reporting
+ *
+ * If reset is in progress, fill extack with error.
+ *
+ * Return:
+ * * false - no reset in progress
+ * * true - reset in progress
+ */
+static bool ice_dpll_is_reset(struct ice_pf *pf, struct netlink_ext_ack *extack)
+{
+	if (ice_is_reset_in_progress(pf->state)) {
+		NL_SET_ERR_MSG(extack, "PF reset in progress");
+		return true;
+	}
+	return false;
+}
+
+/**
  * ice_dpll_pin_freq_set - set pin's frequency
  * @pf: private board structure
  * @pin: pointer to a pin
@@ -109,6 +129,9 @@ ice_dpll_frequency_set(const struct dpll_pin *pin, void *pin_priv,
 	struct ice_pf *pf = d->pf;
 	int ret;
 
+	if (ice_dpll_is_reset(pf, extack))
+		return -EBUSY;
+
 	mutex_lock(&pf->dplls.lock);
 	ret = ice_dpll_pin_freq_set(pf, p, pin_type, frequency, extack);
 	mutex_unlock(&pf->dplls.lock);
@@ -254,6 +277,7 @@ ice_dpll_output_frequency_get(const struct dpll_pin *pin, void *pin_priv,
  * ice_dpll_pin_enable - enable a pin on dplls
  * @hw: board private hw structure
  * @pin: pointer to a pin
+ * @dpll_idx: dpll index to connect to output pin
  * @pin_type: type of pin being enabled
  * @extack: error reporting
  *
@@ -266,7 +290,7 @@ ice_dpll_output_frequency_get(const struct dpll_pin *pin, void *pin_priv,
  */
 static int
 ice_dpll_pin_enable(struct ice_hw *hw, struct ice_dpll_pin *pin,
-		    enum ice_dpll_pin_type pin_type,
+		    u8 dpll_idx, enum ice_dpll_pin_type pin_type,
 		    struct netlink_ext_ack *extack)
 {
 	u8 flags = 0;
@@ -280,10 +304,12 @@ ice_dpll_pin_enable(struct ice_hw *hw, struct ice_dpll_pin *pin,
 		ret = ice_aq_set_input_pin_cfg(hw, pin->idx, 0, flags, 0, 0);
 		break;
 	case ICE_DPLL_PIN_TYPE_OUTPUT:
+		flags = ICE_AQC_SET_CGU_OUT_CFG_UPDATE_SRC_SEL;
 		if (pin->flags[0] & ICE_AQC_GET_CGU_OUT_CFG_ESYNC_EN)
 			flags |= ICE_AQC_SET_CGU_OUT_CFG_ESYNC_EN;
 		flags |= ICE_AQC_SET_CGU_OUT_CFG_OUT_EN;
-		ret = ice_aq_set_output_pin_cfg(hw, pin->idx, flags, 0, 0, 0);
+		ret = ice_aq_set_output_pin_cfg(hw, pin->idx, flags, dpll_idx,
+						0, 0);
 		break;
 	default:
 		return -EINVAL;
@@ -370,7 +396,7 @@ ice_dpll_pin_state_update(struct ice_pf *pf, struct ice_dpll_pin *pin,
 	case ICE_DPLL_PIN_TYPE_INPUT:
 		ret = ice_aq_get_input_pin_cfg(&pf->hw, pin->idx, NULL, NULL,
 					       NULL, &pin->flags[0],
-					       &pin->freq, NULL);
+					       &pin->freq, &pin->phase_adjust);
 		if (ret)
 			goto err;
 		if (ICE_AQC_GET_CGU_IN_CFG_FLG2_INPUT_EN & pin->flags[0]) {
@@ -398,14 +424,27 @@ ice_dpll_pin_state_update(struct ice_pf *pf, struct ice_dpll_pin *pin,
 		break;
 	case ICE_DPLL_PIN_TYPE_OUTPUT:
 		ret = ice_aq_get_output_pin_cfg(&pf->hw, pin->idx,
-						&pin->flags[0], NULL,
+						&pin->flags[0], &parent,
 						&pin->freq, NULL);
 		if (ret)
 			goto err;
-		if (ICE_AQC_SET_CGU_OUT_CFG_OUT_EN & pin->flags[0])
-			pin->state[0] = DPLL_PIN_STATE_CONNECTED;
-		else
-			pin->state[0] = DPLL_PIN_STATE_DISCONNECTED;
+
+		parent &= ICE_AQC_GET_CGU_OUT_CFG_DPLL_SRC_SEL;
+		if (ICE_AQC_SET_CGU_OUT_CFG_OUT_EN & pin->flags[0]) {
+			pin->state[pf->dplls.eec.dpll_idx] =
+				parent == pf->dplls.eec.dpll_idx ?
+				DPLL_PIN_STATE_CONNECTED :
+				DPLL_PIN_STATE_DISCONNECTED;
+			pin->state[pf->dplls.pps.dpll_idx] =
+				parent == pf->dplls.pps.dpll_idx ?
+				DPLL_PIN_STATE_CONNECTED :
+				DPLL_PIN_STATE_DISCONNECTED;
+		} else {
+			pin->state[pf->dplls.eec.dpll_idx] =
+				DPLL_PIN_STATE_DISCONNECTED;
+			pin->state[pf->dplls.pps.dpll_idx] =
+				DPLL_PIN_STATE_DISCONNECTED;
+		}
 		break;
 	case ICE_DPLL_PIN_TYPE_RCLK_INPUT:
 		for (parent = 0; parent < pf->dplls.rclk.num_parents;
@@ -568,9 +607,13 @@ ice_dpll_pin_state_set(const struct dpll_pin *pin, void *pin_priv,
 	struct ice_pf *pf = d->pf;
 	int ret;
 
+	if (ice_dpll_is_reset(pf, extack))
+		return -EBUSY;
+
 	mutex_lock(&pf->dplls.lock);
 	if (enable)
-		ret = ice_dpll_pin_enable(&pf->hw, p, pin_type, extack);
+		ret = ice_dpll_pin_enable(&pf->hw, p, d->dpll_idx, pin_type,
+					  extack);
 	else
 		ret = ice_dpll_pin_disable(&pf->hw, p, pin_type, extack);
 	if (!ret)
@@ -603,6 +646,11 @@ ice_dpll_output_state_set(const struct dpll_pin *pin, void *pin_priv,
 			  struct netlink_ext_ack *extack)
 {
 	bool enable = state == DPLL_PIN_STATE_CONNECTED;
+	struct ice_dpll_pin *p = pin_priv;
+	struct ice_dpll *d = dpll_priv;
+
+	if (!enable && p->state[d->dpll_idx] == DPLL_PIN_STATE_DISCONNECTED)
+		return 0;
 
 	return ice_dpll_pin_state_set(pin, pin_priv, dpll, dpll_priv, enable,
 				      extack, ICE_DPLL_PIN_TYPE_OUTPUT);
@@ -665,14 +713,16 @@ ice_dpll_pin_state_get(const struct dpll_pin *pin, void *pin_priv,
 	struct ice_pf *pf = d->pf;
 	int ret;
 
+	if (ice_dpll_is_reset(pf, extack))
+		return -EBUSY;
+
 	mutex_lock(&pf->dplls.lock);
 	ret = ice_dpll_pin_state_update(pf, p, pin_type, extack);
 	if (ret)
 		goto unlock;
-	if (pin_type == ICE_DPLL_PIN_TYPE_INPUT)
+	if (pin_type == ICE_DPLL_PIN_TYPE_INPUT ||
+	    pin_type == ICE_DPLL_PIN_TYPE_OUTPUT)
 		*state = p->state[d->dpll_idx];
-	else if (pin_type == ICE_DPLL_PIN_TYPE_OUTPUT)
-		*state = p->state[0];
 	ret = 0;
 unlock:
 	mutex_unlock(&pf->dplls.lock);
@@ -790,6 +840,9 @@ ice_dpll_input_prio_set(const struct dpll_pin *pin, void *pin_priv,
 	struct ice_pf *pf = d->pf;
 	int ret;
 
+	if (ice_dpll_is_reset(pf, extack))
+		return -EBUSY;
+
 	mutex_lock(&pf->dplls.lock);
 	ret = ice_dpll_hw_input_prio_set(pf, d, p, prio, extack);
 	mutex_unlock(&pf->dplls.lock);
@@ -910,6 +963,9 @@ ice_dpll_pin_phase_adjust_set(const struct dpll_pin *pin, void *pin_priv,
 	u8 flag, flags_en = 0;
 	int ret;
 
+	if (ice_dpll_is_reset(pf, extack))
+		return -EBUSY;
+
 	mutex_lock(&pf->dplls.lock);
 	switch (type) {
 	case ICE_DPLL_PIN_TYPE_INPUT:
@@ -1069,6 +1125,9 @@ ice_dpll_rclk_state_on_pin_set(const struct dpll_pin *pin, void *pin_priv,
 	int ret = -EINVAL;
 	u32 hw_idx;
 
+	if (ice_dpll_is_reset(pf, extack))
+		return -EBUSY;
+
 	mutex_lock(&pf->dplls.lock);
 	hw_idx = parent->idx - pf->dplls.base_rclk_idx;
 	if (hw_idx >= pf->dplls.num_inputs)
@@ -1123,6 +1182,9 @@ ice_dpll_rclk_state_on_pin_get(const struct dpll_pin *pin, void *pin_priv,
 	int ret = -EINVAL;
 	u32 hw_idx;
 
+	if (ice_dpll_is_reset(pf, extack))
+		return -EBUSY;
+
 	mutex_lock(&pf->dplls.lock);
 	hw_idx = parent->idx - pf->dplls.base_rclk_idx;
 	if (hw_idx >= pf->dplls.num_inputs)
@@ -1305,8 +1367,10 @@ static void ice_dpll_periodic_work(struct kthread_work *work)
 	struct ice_pf *pf = container_of(d, struct ice_pf, dplls);
 	struct ice_dpll *de = &pf->dplls.eec;
 	struct ice_dpll *dp = &pf->dplls.pps;
-	int ret;
+	int ret = 0;
 
+	if (ice_is_reset_in_progress(pf->state))
+		goto resched;
 	mutex_lock(&pf->dplls.lock);
 	ret = ice_dpll_update_state(pf, de, false);
 	if (!ret)
@@ -1326,6 +1390,7 @@ static void ice_dpll_periodic_work(struct kthread_work *work)
 	ice_dpll_notify_changes(de);
 	ice_dpll_notify_changes(dp);
 
+resched:
 	/* Run twice a second or reschedule if update failed */
 	kthread_queue_delayed_work(d->kworker, &d->work,
 				   ret ? msecs_to_jiffies(10) :
diff --git a/drivers/net/ethernet/intel/ice/ice_lib.c b/drivers/net/ethernet/intel/ice/ice_lib.c
index 9be724291ef8..097bf8fd6bf0 100644
--- a/drivers/net/ethernet/intel/ice/ice_lib.c
+++ b/drivers/net/ethernet/intel/ice/ice_lib.c
@@ -2426,7 +2426,7 @@ ice_vsi_cfg_def(struct ice_vsi *vsi, struct ice_vsi_cfg_params *params)
 		ice_vsi_map_rings_to_vectors(vsi);
 
 		/* Associate q_vector rings to napi */
-		ice_vsi_set_napi_queues(vsi, true);
+		ice_vsi_set_napi_queues(vsi);
 
 		vsi->stat_offsets_loaded = false;
 
@@ -2904,19 +2904,19 @@ void ice_vsi_dis_irq(struct ice_vsi *vsi)
 }
 
 /**
- * ice_queue_set_napi - Set the napi instance for the queue
+ * __ice_queue_set_napi - Set the napi instance for the queue
  * @dev: device to which NAPI and queue belong
  * @queue_index: Index of queue
  * @type: queue type as RX or TX
  * @napi: NAPI context
  * @locked: is the rtnl_lock already held
  *
- * Set the napi instance for the queue
+ * Set the napi instance for the queue. Caller indicates the lock status.
  */
 static void
-ice_queue_set_napi(struct net_device *dev, unsigned int queue_index,
-		   enum netdev_queue_type type, struct napi_struct *napi,
-		   bool locked)
+__ice_queue_set_napi(struct net_device *dev, unsigned int queue_index,
+		     enum netdev_queue_type type, struct napi_struct *napi,
+		     bool locked)
 {
 	if (!locked)
 		rtnl_lock();
@@ -2926,26 +2926,79 @@ ice_queue_set_napi(struct net_device *dev, unsigned int queue_index,
 }
 
 /**
- * ice_q_vector_set_napi_queues - Map queue[s] associated with the napi
+ * ice_queue_set_napi - Set the napi instance for the queue
+ * @vsi: VSI being configured
+ * @queue_index: Index of queue
+ * @type: queue type as RX or TX
+ * @napi: NAPI context
+ *
+ * Set the napi instance for the queue. The rtnl lock state is derived from the
+ * execution path.
+ */
+void
+ice_queue_set_napi(struct ice_vsi *vsi, unsigned int queue_index,
+		   enum netdev_queue_type type, struct napi_struct *napi)
+{
+	struct ice_pf *pf = vsi->back;
+
+	if (!vsi->netdev)
+		return;
+
+	if (current_work() == &pf->serv_task ||
+	    test_bit(ICE_PREPARED_FOR_RESET, pf->state) ||
+	    test_bit(ICE_DOWN, pf->state) ||
+	    test_bit(ICE_SUSPENDED, pf->state))
+		__ice_queue_set_napi(vsi->netdev, queue_index, type, napi,
+				     false);
+	else
+		__ice_queue_set_napi(vsi->netdev, queue_index, type, napi,
+				     true);
+}
+
+/**
+ * __ice_q_vector_set_napi_queues - Map queue[s] associated with the napi
  * @q_vector: q_vector pointer
  * @locked: is the rtnl_lock already held
  *
+ * Associate the q_vector napi with all the queue[s] on the vector.
+ * Caller indicates the lock status.
+ */
+void __ice_q_vector_set_napi_queues(struct ice_q_vector *q_vector, bool locked)
+{
+	struct ice_rx_ring *rx_ring;
+	struct ice_tx_ring *tx_ring;
+
+	ice_for_each_rx_ring(rx_ring, q_vector->rx)
+		__ice_queue_set_napi(q_vector->vsi->netdev, rx_ring->q_index,
+				     NETDEV_QUEUE_TYPE_RX, &q_vector->napi,
+				     locked);
+
+	ice_for_each_tx_ring(tx_ring, q_vector->tx)
+		__ice_queue_set_napi(q_vector->vsi->netdev, tx_ring->q_index,
+				     NETDEV_QUEUE_TYPE_TX, &q_vector->napi,
+				     locked);
+	/* Also set the interrupt number for the NAPI */
+	netif_napi_set_irq(&q_vector->napi, q_vector->irq.virq);
+}
+
+/**
+ * ice_q_vector_set_napi_queues - Map queue[s] associated with the napi
+ * @q_vector: q_vector pointer
+ *
  * Associate the q_vector napi with all the queue[s] on the vector
  */
-void ice_q_vector_set_napi_queues(struct ice_q_vector *q_vector, bool locked)
+void ice_q_vector_set_napi_queues(struct ice_q_vector *q_vector)
 {
 	struct ice_rx_ring *rx_ring;
 	struct ice_tx_ring *tx_ring;
 
 	ice_for_each_rx_ring(rx_ring, q_vector->rx)
-		ice_queue_set_napi(q_vector->vsi->netdev, rx_ring->q_index,
-				   NETDEV_QUEUE_TYPE_RX, &q_vector->napi,
-				   locked);
+		ice_queue_set_napi(q_vector->vsi, rx_ring->q_index,
+				   NETDEV_QUEUE_TYPE_RX, &q_vector->napi);
 
 	ice_for_each_tx_ring(tx_ring, q_vector->tx)
-		ice_queue_set_napi(q_vector->vsi->netdev, tx_ring->q_index,
-				   NETDEV_QUEUE_TYPE_TX, &q_vector->napi,
-				   locked);
+		ice_queue_set_napi(q_vector->vsi, tx_ring->q_index,
+				   NETDEV_QUEUE_TYPE_TX, &q_vector->napi);
 	/* Also set the interrupt number for the NAPI */
 	netif_napi_set_irq(&q_vector->napi, q_vector->irq.virq);
 }
@@ -2953,11 +3006,10 @@ void ice_q_vector_set_napi_queues(struct ice_q_vector *q_vector, bool locked)
 /**
  * ice_vsi_set_napi_queues
  * @vsi: VSI pointer
- * @locked: is the rtnl_lock already held
  *
  * Associate queue[s] with napi for all vectors
  */
-void ice_vsi_set_napi_queues(struct ice_vsi *vsi, bool locked)
+void ice_vsi_set_napi_queues(struct ice_vsi *vsi)
 {
 	int i;
 
@@ -2965,7 +3017,7 @@ void ice_vsi_set_napi_queues(struct ice_vsi *vsi, bool locked)
 		return;
 
 	ice_for_each_q_vector(vsi, i)
-		ice_q_vector_set_napi_queues(vsi->q_vectors[i], locked);
+		ice_q_vector_set_napi_queues(vsi->q_vectors[i]);
 }
 
 /**
diff --git a/drivers/net/ethernet/intel/ice/ice_lib.h b/drivers/net/ethernet/intel/ice/ice_lib.h
index 71bd27244941..bfcfc582a4c0 100644
--- a/drivers/net/ethernet/intel/ice/ice_lib.h
+++ b/drivers/net/ethernet/intel/ice/ice_lib.h
@@ -91,9 +91,15 @@ void ice_vsi_cfg_netdev_tc(struct ice_vsi *vsi, u8 ena_tc);
 struct ice_vsi *
 ice_vsi_setup(struct ice_pf *pf, struct ice_vsi_cfg_params *params);
 
-void ice_q_vector_set_napi_queues(struct ice_q_vector *q_vector, bool locked);
+void
+ice_queue_set_napi(struct ice_vsi *vsi, unsigned int queue_index,
+		   enum netdev_queue_type type, struct napi_struct *napi);
+
+void __ice_q_vector_set_napi_queues(struct ice_q_vector *q_vector, bool locked);
+
+void ice_q_vector_set_napi_queues(struct ice_q_vector *q_vector);
 
-void ice_vsi_set_napi_queues(struct ice_vsi *vsi, bool locked);
+void ice_vsi_set_napi_queues(struct ice_vsi *vsi);
 
 int ice_vsi_release(struct ice_vsi *vsi);
 
diff --git a/drivers/net/ethernet/intel/ice/ice_main.c b/drivers/net/ethernet/intel/ice/ice_main.c
index dd4a9bc0dfdc..59c7e37f175f 100644
--- a/drivers/net/ethernet/intel/ice/ice_main.c
+++ b/drivers/net/ethernet/intel/ice/ice_main.c
@@ -3495,7 +3495,7 @@ static void ice_napi_add(struct ice_vsi *vsi)
 	ice_for_each_q_vector(vsi, v_idx) {
 		netif_napi_add(vsi->netdev, &vsi->q_vectors[v_idx]->napi,
 			       ice_napi_poll);
-		ice_q_vector_set_napi_queues(vsi->q_vectors[v_idx], false);
+		__ice_q_vector_set_napi_queues(vsi->q_vectors[v_idx], false);
 	}
 }
 
@@ -5447,6 +5447,7 @@ static int ice_reinit_interrupt_scheme(struct ice_pf *pf)
 		if (ret)
 			goto err_reinit;
 		ice_vsi_map_rings_to_vectors(pf->vsi[v]);
+		ice_vsi_set_napi_queues(pf->vsi[v]);
 	}
 
 	ret = ice_req_irq_msix_misc(pf);