[PATCH v2 net-next 5/6] net: mana: Allocate interrupt context for each EQ when creating vPort

[Long Li <longli@microsoft.com>]

Use GIC functions to create a dedicated interrupt context or acquire a
shared interrupt context for each EQ when setting up a vPort.

Signed-off-by: Long Li <longli@microsoft.com>
---
 drivers/net/ethernet/microsoft/mana/gdma_main.c |  2 +-
 drivers/net/ethernet/microsoft/mana/mana_en.c   | 17 ++++++++++++++++-
 include/net/mana/gdma.h                         |  1 +
 3 files changed, 18 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/microsoft/mana/gdma_main.c b/drivers/net/ethernet/microsoft/mana/gdma_main.c
index bdc9dc437fb7..81c0be96c94b 100644
--- a/drivers/net/ethernet/microsoft/mana/gdma_main.c
+++ b/drivers/net/ethernet/microsoft/mana/gdma_main.c
@@ -809,7 +809,6 @@ static void mana_gd_deregister_irq(struct gdma_queue *queue)
 	}
 	spin_unlock_irqrestore(&gic->lock, flags);
 
-	queue->eq.msix_index = INVALID_PCI_MSIX_INDEX;
 	synchronize_rcu();
 }
 
@@ -924,6 +923,7 @@ 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;
 }
 
diff --git a/drivers/net/ethernet/microsoft/mana/mana_en.c b/drivers/net/ethernet/microsoft/mana/mana_en.c
index bfa0f354355d..8a60e7567951 100644
--- a/drivers/net/ethernet/microsoft/mana/mana_en.c
+++ b/drivers/net/ethernet/microsoft/mana/mana_en.c
@@ -1598,6 +1598,7 @@ void mana_destroy_eq(struct mana_port_context *apc)
 	struct gdma_context *gc = ac->gdma_dev->gdma_context;
 	struct gdma_queue *eq;
 	int i;
+	unsigned int msi;
 
 	if (!apc->eqs)
 		return;
@@ -1610,7 +1611,9 @@ void mana_destroy_eq(struct mana_port_context *apc)
 		if (!eq)
 			continue;
 
+		msi = eq->eq.msix_index;
 		mana_gd_destroy_queue(gc, eq);
+		mana_gd_put_gic(gc, !gc->msi_sharing, msi);
 	}
 
 	kfree(apc->eqs);
@@ -1627,6 +1630,7 @@ 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);
 }
 
@@ -1637,6 +1641,7 @@ 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 = kzalloc_objs(struct mana_eq, apc->num_queues);
@@ -1653,12 +1658,22 @@ 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 = mana_gd_get_gic(gc, !gc->msi_sharing, &spec.eq.msix_index);
+		if (!gic) {
+			err = -ENOMEM;
+			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);
+			mana_gd_put_gic(gc, !gc->msi_sharing, spec.eq.msix_index);
 			goto out;
 		}
+		apc->eqs[i].eq->eq.irq = gic->irq;
 		mana_create_eq_debugfs(apc, i);
 	}
 
diff --git a/include/net/mana/gdma.h b/include/net/mana/gdma.h
index 1a7f4abe7a8b..4e0278b00bbb 100644
--- a/include/net/mana/gdma.h
+++ b/include/net/mana/gdma.h
@@ -342,6 +342,7 @@ struct gdma_queue {
 			void *context;
 
 			unsigned int msix_index;
+			unsigned int irq;
 
 			u32 log2_throttle_limit;
 		} eq;
-- 
2.43.0