net:mana: Create or get interrupt for each EQ when creating vPort

Use gic functions to create a dedicated interrupt context or acquire a
shared interrupt context for this EQ.

Author: longlimsft

drivers/net/ethernet/microsoft/mana/gdma_main.c

@@ -633,7 +633,6 @@ static void mana_gd_deregiser_irq(struct gdma_queue *queue)
 	}
 	spin_unlock_irqrestore(&gic->lock, flags);
 
-	queue->eq.msix_index = INVALID_PCI_MSIX_INDEX;
 	synchronize_rcu();
 }
 
@@ -747,6 +746,7 @@ static int mana_gd_create_eq(struct gdma_dev *gd,
 out:
 	dev_err(dev, "Failed to create EQ: %d\n", err);
 	mana_gd_destroy_eq(gc, false, queue);
+	queue->eq.msix_index = INVALID_PCI_MSIX_INDEX;
 	return err;
 }
 

drivers/net/ethernet/microsoft/mana/mana_en.c

@@ -1262,6 +1262,7 @@ void mana_destroy_eq(struct mana_port_context *apc)
 			continue;
 
 		mana_gd_destroy_queue(gc, eq);
+		gdma_put_gic(gc, !gc->msi_sharing, eq->eq.msix_index);
 	}
 
 	kfree(apc->eqs);
@@ -1278,6 +1279,7 @@ static void mana_create_eq_debugfs(struct mana_port_context *apc, int i)
 	eq.mana_eq_debugfs = debugfs_create_dir(eqnum, apc->mana_eqs_debugfs);
 	debugfs_create_u32("head", 0400, eq.mana_eq_debugfs, &eq.eq->head);
 	debugfs_create_u32("tail", 0400, eq.mana_eq_debugfs, &eq.eq->tail);
+	debugfs_create_u32("irq", 0400, eq.mana_eq_debugfs, &eq.eq->eq.irq);
 	debugfs_create_file("eq_dump", 0400, eq.mana_eq_debugfs, eq.eq, &mana_dbg_q_fops);
 }
 
@@ -1288,6 +1290,7 @@ int mana_create_eq(struct mana_port_context *apc)
 	struct gdma_queue_spec spec = {};
 	int err;
 	int i;
+	struct gdma_irq_context *gic;
 
 	WARN_ON(apc->eqs);
 	apc->eqs = kcalloc(apc->num_queues, sizeof(struct mana_eq),
@@ -1305,12 +1308,19 @@ int mana_create_eq(struct mana_port_context *apc)
 	apc->mana_eqs_debugfs = debugfs_create_dir("EQs", apc->mana_port_debugfs);
 
 	for (i = 0; i < apc->num_queues; i++) {
-		spec.eq.msix_index = (i + 1) % gc->num_msix_usable;
+		if (gc->msi_sharing)
+			spec.eq.msix_index = (i + 1) % gc->num_msix_usable;
+		gic = gdma_get_gic(gc, !gc->msi_sharing, apc->port_idx, i,
+				   &spec.eq.msix_index);
+		if (!gic)
+			goto out;
+
 		err = mana_gd_create_mana_eq(gd, &spec, &apc->eqs[i].eq);
 		if (err) {
 			dev_err(gc->dev, "Failed to create EQ %d : %d\n", i, err);
 			goto out;
 		}
+		apc->eqs[i].eq->eq.irq = gic->irq;
 		mana_create_eq_debugfs(apc, i);
 	}
 

include/net/mana/gdma.h

@@ -317,6 +317,7 @@ struct gdma_queue {
 			void *context;
 
 			unsigned int msix_index;
+			unsigned int irq;
 
 			u32 log2_throttle_limit;
 		} eq;