netdev - [PATCH iwl-next 1/3] ice: do not disable Tx queues twice in ice

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Date: Thu, 22 Feb 2024 15:50:23 +0100
From: Maciej Fijalkowski <maciej.fijalkowski@...el.com>
To: intel-wired-lan@...ts.osuosl.org
Cc: netdev@...r.kernel.org,
	anthony.l.nguyen@...el.com,
	magnus.karlsson@...el.com,
	Maciej Fijalkowski <maciej.fijalkowski@...el.com>
Subject: [PATCH iwl-next 1/3] ice: do not disable Tx queues twice in ice_down()

ice_down() clears QINT_TQCTL_CAUSE_ENA_M bit twice, which is not
necessary. First clearing happens in ice_vsi_dis_irq() and second in
ice_vsi_stop_tx_ring() - remove the first one.

While at it, make ice_vsi_dis_irq() static as ice_down() is the only
current caller of it.

Signed-off-by: Maciej Fijalkowski <maciej.fijalkowski@...el.com>
---
 drivers/net/ethernet/intel/ice/ice_lib.c  | 55 -----------------------
 drivers/net/ethernet/intel/ice/ice_lib.h  |  2 -
 drivers/net/ethernet/intel/ice/ice_main.c | 44 ++++++++++++++++++
 3 files changed, 44 insertions(+), 57 deletions(-)

diff --git a/drivers/net/ethernet/intel/ice/ice_lib.c b/drivers/net/ethernet/intel/ice/ice_lib.c
index 9be724291ef8..9323bc1d4bdc 100644
--- a/drivers/net/ethernet/intel/ice/ice_lib.c
+++ b/drivers/net/ethernet/intel/ice/ice_lib.c
@@ -2848,61 +2848,6 @@ void ice_dis_vsi(struct ice_vsi *vsi, bool locked)
 	}
 }
 
-/**
- * ice_vsi_dis_irq - Mask off queue interrupt generation on the VSI
- * @vsi: the VSI being un-configured
- */
-void ice_vsi_dis_irq(struct ice_vsi *vsi)
-{
-	struct ice_pf *pf = vsi->back;
-	struct ice_hw *hw = &pf->hw;
-	u32 val;
-	int i;
-
-	/* disable interrupt causation from each queue */
-	if (vsi->tx_rings) {
-		ice_for_each_txq(vsi, i) {
-			if (vsi->tx_rings[i]) {
-				u16 reg;
-
-				reg = vsi->tx_rings[i]->reg_idx;
-				val = rd32(hw, QINT_TQCTL(reg));
-				val &= ~QINT_TQCTL_CAUSE_ENA_M;
-				wr32(hw, QINT_TQCTL(reg), val);
-			}
-		}
-	}
-
-	if (vsi->rx_rings) {
-		ice_for_each_rxq(vsi, i) {
-			if (vsi->rx_rings[i]) {
-				u16 reg;
-
-				reg = vsi->rx_rings[i]->reg_idx;
-				val = rd32(hw, QINT_RQCTL(reg));
-				val &= ~QINT_RQCTL_CAUSE_ENA_M;
-				wr32(hw, QINT_RQCTL(reg), val);
-			}
-		}
-	}
-
-	/* disable each interrupt */
-	ice_for_each_q_vector(vsi, i) {
-		if (!vsi->q_vectors[i])
-			continue;
-		wr32(hw, GLINT_DYN_CTL(vsi->q_vectors[i]->reg_idx), 0);
-	}
-
-	ice_flush(hw);
-
-	/* don't call synchronize_irq() for VF's from the host */
-	if (vsi->type == ICE_VSI_VF)
-		return;
-
-	ice_for_each_q_vector(vsi, i)
-		synchronize_irq(vsi->q_vectors[i]->irq.virq);
-}
-
 /**
  * ice_queue_set_napi - Set the napi instance for the queue
  * @dev: device to which NAPI and queue belong
diff --git a/drivers/net/ethernet/intel/ice/ice_lib.h b/drivers/net/ethernet/intel/ice/ice_lib.h
index 71bd27244941..c394fe9abba4 100644
--- a/drivers/net/ethernet/intel/ice/ice_lib.h
+++ b/drivers/net/ethernet/intel/ice/ice_lib.h
@@ -114,8 +114,6 @@ void
 ice_write_qrxflxp_cntxt(struct ice_hw *hw, u16 pf_q, u32 rxdid, u32 prio,
 			bool ena_ts);
 
-void ice_vsi_dis_irq(struct ice_vsi *vsi);
-
 void ice_vsi_free_irq(struct ice_vsi *vsi);
 
 void ice_vsi_free_rx_rings(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..2358977324fd 100644
--- a/drivers/net/ethernet/intel/ice/ice_main.c
+++ b/drivers/net/ethernet/intel/ice/ice_main.c
@@ -7059,6 +7059,50 @@ static void ice_napi_disable_all(struct ice_vsi *vsi)
 	}
 }
 
+/**
+ * ice_vsi_dis_irq - Mask off queue interrupt generation on the VSI
+ * @vsi: the VSI being un-configured
+ */
+static void ice_vsi_dis_irq(struct ice_vsi *vsi)
+{
+	struct ice_pf *pf = vsi->back;
+	struct ice_hw *hw = &pf->hw;
+	u32 val;
+	int i;
+
+	/* disable interrupt causation from each Rx queue; Tx queues are
+	 * handled in ice_vsi_stop_tx_ring()
+	 */
+	if (vsi->rx_rings) {
+		ice_for_each_rxq(vsi, i) {
+			if (vsi->rx_rings[i]) {
+				u16 reg;
+
+				reg = vsi->rx_rings[i]->reg_idx;
+				val = rd32(hw, QINT_RQCTL(reg));
+				val &= ~QINT_RQCTL_CAUSE_ENA_M;
+				wr32(hw, QINT_RQCTL(reg), val);
+			}
+		}
+	}
+
+	/* disable each interrupt */
+	ice_for_each_q_vector(vsi, i) {
+		if (!vsi->q_vectors[i])
+			continue;
+		wr32(hw, GLINT_DYN_CTL(vsi->q_vectors[i]->reg_idx), 0);
+	}
+
+	ice_flush(hw);
+
+	/* don't call synchronize_irq() for VF's from the host */
+	if (vsi->type == ICE_VSI_VF)
+		return;
+
+	ice_for_each_q_vector(vsi, i)
+		synchronize_irq(vsi->q_vectors[i]->irq.virq);
+}
+
 /**
  * ice_down - Shutdown the connection
  * @vsi: The VSI being stopped
-- 
2.34.1