ice: get rid of num_lan_msix field

Remove the field to allow having more queues than MSI-X on VSI. As
default the number will be the same, but if there won't be more MSI-X
available VSI can run with at least one MSI-X.

Reviewed-by: Jacob Keller <[email protected]>
Reviewed-by: Wojciech Drewek <[email protected]>
Tested-by: Pucha Himasekhar Reddy <[email protected]>
Signed-off-by: Michal Swiatkowski <[email protected]>
Signed-off-by: Tony Nguyen <[email protected]>

Author: Michal Swiatkowski

drivers/net/ethernet/intel/ice/ice.h

@@ -617,7 +617,6 @@ struct ice_pf {
 	u16 max_pf_txqs;	/* Total Tx queues PF wide */
 	u16 max_pf_rxqs;	/* Total Rx queues PF wide */
 	struct ice_pf_msix msix;
-	u16 num_lan_msix;	/* Total MSIX vectors for base driver */
 	u16 num_lan_tx;		/* num LAN Tx queues setup */
 	u16 num_lan_rx;		/* num LAN Rx queues setup */
 	u16 next_vsi;		/* Next free slot in pf->vsi[] - 0-based! */

drivers/net/ethernet/intel/ice/ice_base.c

@@ -801,13 +801,11 @@ int ice_vsi_alloc_q_vectors(struct ice_vsi *vsi)
 	return 0;
 
 err_out:
-	while (v_idx--)
-		ice_free_q_vector(vsi, v_idx);
 
-	dev_err(dev, "Failed to allocate %d q_vector for VSI %d, ret=%d\n",
-		vsi->num_q_vectors, vsi->vsi_num, err);
-	vsi->num_q_vectors = 0;
-	return err;
+	dev_info(dev, "Failed to allocate %d q_vectors for VSI %d, new value %d",
+		 vsi->num_q_vectors, vsi->vsi_num, v_idx);
+	vsi->num_q_vectors = v_idx;
+	return v_idx ? 0 : err;
 }
 
 /**

drivers/net/ethernet/intel/ice/ice_ethtool.c

@@ -3788,8 +3788,7 @@ ice_get_ts_info(struct net_device *dev, struct kernel_ethtool_ts_info *info)
  */
 static int ice_get_max_txq(struct ice_pf *pf)
 {
-	return min3(pf->num_lan_msix, (u16)num_online_cpus(),
-		    (u16)pf->hw.func_caps.common_cap.num_txq);
+	return min(num_online_cpus(), pf->hw.func_caps.common_cap.num_txq);
 }
 
 /**
@@ -3798,8 +3797,7 @@ static int ice_get_max_txq(struct ice_pf *pf)
  */
 static int ice_get_max_rxq(struct ice_pf *pf)
 {
-	return min3(pf->num_lan_msix, (u16)num_online_cpus(),
-		    (u16)pf->hw.func_caps.common_cap.num_rxq);
+	return min(num_online_cpus(), pf->hw.func_caps.common_cap.num_rxq);
 }
 
 /**

drivers/net/ethernet/intel/ice/ice_irq.c

@@ -108,7 +108,7 @@ void ice_clear_interrupt_scheme(struct ice_pf *pf)
 int ice_init_interrupt_scheme(struct ice_pf *pf)
 {
 	int total_vectors = pf->hw.func_caps.common_cap.num_msix_vectors;
-	int vectors, max_vectors;
+	int vectors;
 
 	/* load default PF MSI-X range */
 	if (!pf->msix.min)
@@ -118,20 +118,17 @@ int ice_init_interrupt_scheme(struct ice_pf *pf)
 		pf->msix.max = min(total_vectors,
 				   ice_get_default_msix_amount(pf));
 
-	if (pci_msix_can_alloc_dyn(pf->pdev)) {
+	if (pci_msix_can_alloc_dyn(pf->pdev))
 		vectors = pf->msix.min;
-		max_vectors = total_vectors;
-	} else {
+	else
 		vectors = pf->msix.max;
-		max_vectors = vectors;
-	}
 
 	vectors = pci_alloc_irq_vectors(pf->pdev, pf->msix.min, vectors,
 					PCI_IRQ_MSIX);
 	if (vectors < pf->msix.min)
 		return -ENOMEM;
 
-	ice_init_irq_tracker(pf, max_vectors, vectors);
+	ice_init_irq_tracker(pf, pf->msix.max, vectors);
 
 	return 0;
 }

drivers/net/ethernet/intel/ice/ice_lib.c

@@ -157,6 +157,16 @@ static void ice_vsi_set_num_desc(struct ice_vsi *vsi)
 	}
 }
 
+static u16 ice_get_rxq_count(struct ice_pf *pf)
+{
+	return min(ice_get_avail_rxq_count(pf), num_online_cpus());
+}
+
+static u16 ice_get_txq_count(struct ice_pf *pf)
+{
+	return min(ice_get_avail_txq_count(pf), num_online_cpus());
+}
+
 /**
  * ice_vsi_set_num_qs - Set number of queues, descriptors and vectors for a VSI
  * @vsi: the VSI being configured
@@ -178,9 +188,7 @@ static void ice_vsi_set_num_qs(struct ice_vsi *vsi)
 			vsi->alloc_txq = vsi->req_txq;
 			vsi->num_txq = vsi->req_txq;
 		} else {
-			vsi->alloc_txq = min3(pf->num_lan_msix,
-					      ice_get_avail_txq_count(pf),
-					      (u16)num_online_cpus());
+			vsi->alloc_txq = ice_get_txq_count(pf);
 		}
 
 		pf->num_lan_tx = vsi->alloc_txq;
@@ -193,17 +201,13 @@ static void ice_vsi_set_num_qs(struct ice_vsi *vsi)
 				vsi->alloc_rxq = vsi->req_rxq;
 				vsi->num_rxq = vsi->req_rxq;
 			} else {
-				vsi->alloc_rxq = min3(pf->num_lan_msix,
-						      ice_get_avail_rxq_count(pf),
-						      (u16)num_online_cpus());
+				vsi->alloc_rxq = ice_get_rxq_count(pf);
 			}
 		}
 
 		pf->num_lan_rx = vsi->alloc_rxq;
 
-		vsi->num_q_vectors = min_t(int, pf->num_lan_msix,
-					   max_t(int, vsi->alloc_rxq,
-						 vsi->alloc_txq));
+		vsi->num_q_vectors = max(vsi->alloc_rxq, vsi->alloc_txq);
 		break;
 	case ICE_VSI_SF:
 		vsi->alloc_txq = 1;
@@ -1173,12 +1177,11 @@ static void ice_set_rss_vsi_ctx(struct ice_vsi_ctx *ctxt, struct ice_vsi *vsi)
 static void
 ice_chnl_vsi_setup_q_map(struct ice_vsi *vsi, struct ice_vsi_ctx *ctxt)
 {
-	struct ice_pf *pf = vsi->back;
 	u16 qcount, qmap;
 	u8 offset = 0;
 	int pow;
 
-	qcount = min_t(int, vsi->num_rxq, pf->num_lan_msix);
+	qcount = vsi->num_rxq;
 
 	pow = order_base_2(qcount);
 	qmap = FIELD_PREP(ICE_AQ_VSI_TC_Q_OFFSET_M, offset);