netdev - [PATCH rdma-next 03/13] RDMA/mana_ib: helpers to allocate kernel queues

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Message-Id: <1737394039-28772-4-git-send-email-kotaranov@linux.microsoft.com>
Date: Mon, 20 Jan 2025 09:27:09 -0800
From: Konstantin Taranov <kotaranov@...ux.microsoft.com>
To: kotaranov@...rosoft.com,
	shirazsaleem@...rosoft.com,
	pabeni@...hat.com,
	haiyangz@...rosoft.com,
	kys@...rosoft.com,
	edumazet@...gle.com,
	kuba@...nel.org,
	davem@...emloft.net,
	decui@...rosoft.com,
	wei.liu@...nel.org,
	sharmaajay@...rosoft.com,
	longli@...rosoft.com,
	jgg@...pe.ca,
	leon@...nel.org
Cc: linux-rdma@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	netdev@...r.kernel.org,
	linux-hyperv@...r.kernel.org
Subject: [PATCH rdma-next 03/13] RDMA/mana_ib: helpers to allocate kernel queues

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

Introduce helpers to allocate queues for kernel-level use.

Signed-off-by: Konstantin Taranov <kotaranov@...rosoft.com>
Reviewed-by: Shiraz Saleem <shirazsaleem@...rosoft.com>
---
 drivers/infiniband/hw/mana/main.c             | 23 +++++++++++++++++++
 drivers/infiniband/hw/mana/mana_ib.h          |  3 +++
 .../net/ethernet/microsoft/mana/gdma_main.c   |  1 +
 3 files changed, 27 insertions(+)

diff --git a/drivers/infiniband/hw/mana/main.c b/drivers/infiniband/hw/mana/main.c
index 45b251b..f2f6bb3 100644
--- a/drivers/infiniband/hw/mana/main.c
+++ b/drivers/infiniband/hw/mana/main.c
@@ -240,6 +240,27 @@ void mana_ib_dealloc_ucontext(struct ib_ucontext *ibcontext)
 		ibdev_dbg(ibdev, "Failed to destroy doorbell page %d\n", ret);
 }
 
+int mana_ib_create_kernel_queue(struct mana_ib_dev *mdev, u32 size, enum gdma_queue_type type,
+				struct mana_ib_queue *queue)
+{
+	struct gdma_context *gc = mdev_to_gc(mdev);
+	struct gdma_queue_spec spec = {};
+	int err;
+
+	queue->id = INVALID_QUEUE_ID;
+	queue->gdma_region = GDMA_INVALID_DMA_REGION;
+	spec.type = type;
+	spec.monitor_avl_buf = false;
+	spec.queue_size = size;
+	err = mana_gd_create_mana_wq_cq(&gc->mana_ib, &spec, &queue->kmem);
+	if (err)
+		return err;
+	/* take ownership into mana_ib from mana */
+	queue->gdma_region = queue->kmem->mem_info.dma_region_handle;
+	queue->kmem->mem_info.dma_region_handle = GDMA_INVALID_DMA_REGION;
+	return 0;
+}
+
 int mana_ib_create_queue(struct mana_ib_dev *mdev, u64 addr, u32 size,
 			 struct mana_ib_queue *queue)
 {
@@ -279,6 +300,8 @@ void mana_ib_destroy_queue(struct mana_ib_dev *mdev, struct mana_ib_queue *queue
 	 */
 	mana_ib_gd_destroy_dma_region(mdev, queue->gdma_region);
 	ib_umem_release(queue->umem);
+	if (queue->kmem)
+		mana_gd_destroy_queue(mdev_to_gc(mdev), queue->kmem);
 }
 
 static int
diff --git a/drivers/infiniband/hw/mana/mana_ib.h b/drivers/infiniband/hw/mana/mana_ib.h
index b53a5b4..79ebd95 100644
--- a/drivers/infiniband/hw/mana/mana_ib.h
+++ b/drivers/infiniband/hw/mana/mana_ib.h
@@ -52,6 +52,7 @@ struct mana_ib_adapter_caps {
 
 struct mana_ib_queue {
 	struct ib_umem *umem;
+	struct gdma_queue *kmem;
 	u64 gdma_region;
 	u64 id;
 };
@@ -388,6 +389,8 @@ int mana_ib_create_dma_region(struct mana_ib_dev *dev, struct ib_umem *umem,
 int mana_ib_gd_destroy_dma_region(struct mana_ib_dev *dev,
 				  mana_handle_t gdma_region);
 
+int mana_ib_create_kernel_queue(struct mana_ib_dev *mdev, u32 size, enum gdma_queue_type type,
+				struct mana_ib_queue *queue);
 int mana_ib_create_queue(struct mana_ib_dev *mdev, u64 addr, u32 size,
 			 struct mana_ib_queue *queue);
 void mana_ib_destroy_queue(struct mana_ib_dev *mdev, struct mana_ib_queue *queue);
diff --git a/drivers/net/ethernet/microsoft/mana/gdma_main.c b/drivers/net/ethernet/microsoft/mana/gdma_main.c
index e97af7a..3cb0543 100644
--- a/drivers/net/ethernet/microsoft/mana/gdma_main.c
+++ b/drivers/net/ethernet/microsoft/mana/gdma_main.c
@@ -867,6 +867,7 @@ free_q:
 	kfree(queue);
 	return err;
 }
+EXPORT_SYMBOL_NS(mana_gd_create_mana_wq_cq, NET_MANA);
 
 void mana_gd_destroy_queue(struct gdma_context *gc, struct gdma_queue *queue)
 {
-- 
2.43.0