linux-kernel - [PATCH rdma-next v2 1/5] RDMA/mana

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Date: Fri, 26 Apr 2024 06:12:36 -0700
From: Konstantin Taranov <kotaranov@...ux.microsoft.com>
To: kotaranov@...rosoft.com,
	sharmaajay@...rosoft.com,
	longli@...rosoft.com,
	jgg@...pe.ca,
	leon@...nel.org
Cc: linux-rdma@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH rdma-next v2 1/5] RDMA/mana_ib: create EQs for RNIC CQs

From: Konstantin Taranov <kotaranov@...rosoft.com>

Create EQs within mana_ib device. Such EQs are required
for creation of RNIC CQs.

Signed-off-by: Konstantin Taranov <kotaranov@...rosoft.com>
Reviewed-by: Long Li <longli@...rosoft.com>
---
 drivers/infiniband/hw/mana/main.c    | 34 ++++++++++++++++++++++++++--
 drivers/infiniband/hw/mana/mana_ib.h |  1 +
 2 files changed, 33 insertions(+), 2 deletions(-)

diff --git a/drivers/infiniband/hw/mana/main.c b/drivers/infiniband/hw/mana/main.c
index f540147..546d059 100644
--- a/drivers/infiniband/hw/mana/main.c
+++ b/drivers/infiniband/hw/mana/main.c
@@ -658,7 +658,7 @@ int mana_ib_create_eqs(struct mana_ib_dev *mdev)
 {
 	struct gdma_context *gc = mdev_to_gc(mdev);
 	struct gdma_queue_spec spec = {};
-	int err;
+	int err, i;
 
 	spec.type = GDMA_EQ;
 	spec.monitor_avl_buf = false;
@@ -672,12 +672,42 @@ int mana_ib_create_eqs(struct mana_ib_dev *mdev)
 	if (err)
 		return err;
 
+	mdev->eqs = kcalloc(mdev->ib_dev.num_comp_vectors, sizeof(struct gdma_queue *),
+			    GFP_KERNEL);
+	if (!mdev->eqs) {
+		err = -ENOMEM;
+		goto destroy_fatal_eq;
+	}
+
+	for (i = 0; i < mdev->ib_dev.num_comp_vectors; i++) {
+		spec.eq.msix_index = (i + 1) % gc->num_msix_usable;
+		err = mana_gd_create_mana_eq(mdev->gdma_dev, &spec, &mdev->eqs[i]);
+		if (err)
+			goto destroy_eqs;
+	}
+
 	return 0;
+
+destroy_eqs:
+	while (i-- > 0)
+		mana_gd_destroy_queue(gc, mdev->eqs[i]);
+	kfree(mdev->eqs);
+destroy_fatal_eq:
+	mana_gd_destroy_queue(gc, mdev->fatal_err_eq);
+	return err;
 }
 
 void mana_ib_destroy_eqs(struct mana_ib_dev *mdev)
 {
-	mana_gd_destroy_queue(mdev_to_gc(mdev), mdev->fatal_err_eq);
+	struct gdma_context *gc = mdev_to_gc(mdev);
+	int i;
+
+	mana_gd_destroy_queue(gc, mdev->fatal_err_eq);
+
+	for (i = 0; i < mdev->ib_dev.num_comp_vectors; i++)
+		mana_gd_destroy_queue(gc, mdev->eqs[i]);
+
+	kfree(mdev->eqs);
 }
 
 int mana_ib_gd_create_rnic_adapter(struct mana_ib_dev *mdev)
diff --git a/drivers/infiniband/hw/mana/mana_ib.h b/drivers/infiniband/hw/mana/mana_ib.h
index 4c1240d..bfcf6df 100644
--- a/drivers/infiniband/hw/mana/mana_ib.h
+++ b/drivers/infiniband/hw/mana/mana_ib.h
@@ -56,6 +56,7 @@ struct mana_ib_dev {
 	struct gdma_dev *gdma_dev;
 	mana_handle_t adapter_handle;
 	struct gdma_queue *fatal_err_eq;
+	struct gdma_queue **eqs;
 	struct mana_ib_adapter_caps adapter_caps;
 };
 
-- 
2.43.0