linux-kernel - [PATCH rdma-next v2 1/5] RDMA/mana_ib: Add EQ creation for rnic adapter

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Date: Fri,  2 Feb 2024 07:06:33 -0800
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: Add EQ creation for rnic adapter

This patch introduces functions for RNIC creation
and creates one EQ for RNIC creation.

Signed-off-by: Konstantin Taranov <kotaranov@...ux.microsoft.com>
---
 drivers/infiniband/hw/mana/device.c  |  9 ++++--
 drivers/infiniband/hw/mana/main.c    | 53 ++++++++++++++++++++++++++++++++++++
 drivers/infiniband/hw/mana/mana_ib.h |  5 ++++
 3 files changed, 64 insertions(+), 3 deletions(-)

diff --git a/drivers/infiniband/hw/mana/device.c b/drivers/infiniband/hw/mana/device.c
index 6fa902e..d8e8b10 100644
--- a/drivers/infiniband/hw/mana/device.c
+++ b/drivers/infiniband/hw/mana/device.c
@@ -92,15 +92,19 @@ static int mana_ib_probe(struct auxiliary_device *adev,
 		goto deregister_device;
 	}
 
+	mana_ib_gd_create_rnic_adapter(dev);
+
 	ret = ib_register_device(&dev->ib_dev, "mana_%d",
 				 mdev->gdma_context->dev);
 	if (ret)
-		goto deregister_device;
+		goto destroy_rnic_adapter;
 
 	dev_set_drvdata(&adev->dev, dev);
 
 	return 0;
 
+destroy_rnic_adapter:
+	mana_ib_gd_destroy_rnic_adapter(dev);
 deregister_device:
 	mana_gd_deregister_device(dev->gdma_dev);
 free_ib_device:
@@ -113,9 +117,8 @@ static void mana_ib_remove(struct auxiliary_device *adev)
 	struct mana_ib_dev *dev = dev_get_drvdata(&adev->dev);
 
 	ib_unregister_device(&dev->ib_dev);
-
+	mana_ib_gd_destroy_rnic_adapter(dev);
 	mana_gd_deregister_device(dev->gdma_dev);
-
 	ib_dealloc_device(&dev->ib_dev);
 }
 
diff --git a/drivers/infiniband/hw/mana/main.c b/drivers/infiniband/hw/mana/main.c
index 29dd243..c64d569 100644
--- a/drivers/infiniband/hw/mana/main.c
+++ b/drivers/infiniband/hw/mana/main.c
@@ -548,3 +548,56 @@ int mana_ib_gd_query_adapter_caps(struct mana_ib_dev *dev)
 
 	return 0;
 }
+
+static 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;
+
+	spec.type = GDMA_EQ;
+	spec.monitor_avl_buf = false;
+	spec.queue_size = EQ_SIZE;
+	spec.eq.callback = NULL;
+	spec.eq.context = mdev;
+	spec.eq.log2_throttle_limit = LOG2_EQ_THROTTLE;
+	spec.eq.msix_index = 0;
+
+	err = mana_gd_create_mana_eq(&gc->mana_ib, &spec, &mdev->fatal_err_eq);
+	if (err)
+		return err;
+
+	return 0;
+}
+
+static void mana_ib_destroy_eqs(struct mana_ib_dev *mdev)
+{
+	if (!mdev->fatal_err_eq)
+		return;
+
+	mana_gd_destroy_queue(mdev_to_gc(mdev), mdev->fatal_err_eq);
+	mdev->fatal_err_eq = NULL;
+}
+
+void mana_ib_gd_create_rnic_adapter(struct mana_ib_dev *mdev)
+{
+	int err;
+
+	err = mana_ib_create_eqs(mdev);
+	if (err) {
+		ibdev_err(&mdev->ib_dev, "Failed to create EQs for RNIC err %d", err);
+		goto cleanup;
+	}
+
+	return;
+
+cleanup:
+	ibdev_warn(&mdev->ib_dev,
+		   "RNIC is not available. Only RAW QPs are supported");
+	mana_ib_destroy_eqs(mdev);
+}
+
+void mana_ib_gd_destroy_rnic_adapter(struct mana_ib_dev *mdev)
+{
+	mana_ib_destroy_eqs(mdev);
+}
diff --git a/drivers/infiniband/hw/mana/mana_ib.h b/drivers/infiniband/hw/mana/mana_ib.h
index 6a03ae6..a4b94ee 100644
--- a/drivers/infiniband/hw/mana/mana_ib.h
+++ b/drivers/infiniband/hw/mana/mana_ib.h
@@ -48,6 +48,7 @@ struct mana_ib_adapter_caps {
 struct mana_ib_dev {
 	struct ib_device ib_dev;
 	struct gdma_dev *gdma_dev;
+	struct gdma_queue *fatal_err_eq;
 	struct mana_ib_adapter_caps adapter_caps;
 };
 
@@ -228,4 +229,8 @@ int mana_ib_query_gid(struct ib_device *ibdev, u32 port, int index,
 void mana_ib_disassociate_ucontext(struct ib_ucontext *ibcontext);
 
 int mana_ib_gd_query_adapter_caps(struct mana_ib_dev *mdev);
+
+void mana_ib_gd_create_rnic_adapter(struct mana_ib_dev *mdev);
+
+void mana_ib_gd_destroy_rnic_adapter(struct mana_ib_dev *mdev);
 #endif
-- 
1.8.3.1