linux-kernel - [PATCH rdma-next v1 2/5] RDMA/mana_ib: Create and destroy rnic adapter

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Message-Id: <1706698552-25383-3-git-send-email-kotaranov@linux.microsoft.com>
Date: Wed, 31 Jan 2024 02:55:49 -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 v1 2/5] RDMA/mana_ib: Create and destroy rnic adapter

This patch adds RNIC creation and destruction.
If creation of RNIC fails, we support only RAW QPs as they are served by
ethernet driver.

Signed-off-by: Konstantin Taranov <kotaranov@...ux.microsoft.com>
---
 drivers/infiniband/hw/mana/main.c    | 31 +++++++++++++++++++++++++++++++
 drivers/infiniband/hw/mana/mana_ib.h | 29 +++++++++++++++++++++++++++++
 2 files changed, 60 insertions(+)

diff --git a/drivers/infiniband/hw/mana/main.c b/drivers/infiniband/hw/mana/main.c
index c64d569..33cd69e 100644
--- a/drivers/infiniband/hw/mana/main.c
+++ b/drivers/infiniband/hw/mana/main.c
@@ -581,14 +581,31 @@ static void mana_ib_destroy_eqs(struct mana_ib_dev *mdev)
 
 void mana_ib_gd_create_rnic_adapter(struct mana_ib_dev *mdev)
 {
+	struct mana_rnic_create_adapter_resp resp = {};
+	struct mana_rnic_create_adapter_req req = {};
+	struct gdma_context *gc = mdev_to_gc(mdev);
 	int err;
 
+	mdev->adapter_handle = INVALID_MANA_HANDLE;
+
 	err = mana_ib_create_eqs(mdev);
 	if (err) {
 		ibdev_err(&mdev->ib_dev, "Failed to create EQs for RNIC err %d", err);
 		goto cleanup;
 	}
 
+	mana_gd_init_req_hdr(&req.hdr, MANA_IB_CREATE_ADAPTER, sizeof(req), sizeof(resp));
+	req.hdr.req.msg_version = GDMA_MESSAGE_V2;
+	req.hdr.dev_id = gc->mana_ib.dev_id;
+	req.notify_eq_id = mdev->fatal_err_eq->id;
+
+	err = mana_gd_send_request(gc, sizeof(req), &req, sizeof(resp), &resp);
+	if (err) {
+		ibdev_err(&mdev->ib_dev, "Failed to create RNIC adapter err %d", err);
+		goto cleanup;
+	}
+	mdev->adapter_handle = resp.adapter;
+
 	return;
 
 cleanup:
@@ -599,5 +616,19 @@ void mana_ib_gd_create_rnic_adapter(struct mana_ib_dev *mdev)
 
 void mana_ib_gd_destroy_rnic_adapter(struct mana_ib_dev *mdev)
 {
+	struct mana_rnic_destroy_adapter_resp resp = {};
+	struct mana_rnic_destroy_adapter_req req = {};
+	struct gdma_context *gc;
+
+	if (!rnic_is_enabled(mdev))
+		return;
+
+	gc = mdev_to_gc(mdev);
+	mana_gd_init_req_hdr(&req.hdr, MANA_IB_DESTROY_ADAPTER, sizeof(req), sizeof(resp));
+	req.hdr.dev_id = gc->mana_ib.dev_id;
+	req.adapter = mdev->adapter_handle;
+
+	mana_gd_send_request(gc, sizeof(req), &req, sizeof(resp), &resp);
+	mdev->adapter_handle = INVALID_MANA_HANDLE;
 	mana_ib_destroy_eqs(mdev);
 }
diff --git a/drivers/infiniband/hw/mana/mana_ib.h b/drivers/infiniband/hw/mana/mana_ib.h
index a4b94ee..96454cf 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;
+	mana_handle_t adapter_handle;
 	struct gdma_queue *fatal_err_eq;
 	struct mana_ib_adapter_caps adapter_caps;
 };
@@ -115,6 +116,8 @@ struct mana_ib_rwq_ind_table {
 
 enum mana_ib_command_code {
 	MANA_IB_GET_ADAPTER_CAP = 0x30001,
+	MANA_IB_CREATE_ADAPTER  = 0x30002,
+	MANA_IB_DESTROY_ADAPTER = 0x30003,
 };
 
 struct mana_ib_query_adapter_caps_req {
@@ -143,6 +146,32 @@ struct mana_ib_query_adapter_caps_resp {
 	u32 max_inline_data_size;
 }; /* HW Data */
 
+struct mana_rnic_create_adapter_req {
+	struct gdma_req_hdr hdr;
+	u32 notify_eq_id;
+	u32 reserved;
+	u64 feature_flags;
+}; /*HW Data */
+
+struct mana_rnic_create_adapter_resp {
+	struct gdma_resp_hdr hdr;
+	mana_handle_t adapter;
+}; /* HW Data */
+
+struct mana_rnic_destroy_adapter_req {
+	struct gdma_req_hdr hdr;
+	mana_handle_t adapter;
+}; /*HW Data */
+
+struct mana_rnic_destroy_adapter_resp {
+	struct gdma_resp_hdr hdr;
+}; /* HW Data */
+
+static inline bool rnic_is_enabled(struct mana_ib_dev *mdev)
+{
+	return mdev->adapter_handle != INVALID_MANA_HANDLE;
+}
+
 static inline struct gdma_context *mdev_to_gc(struct mana_ib_dev *mdev)
 {
 	return mdev->gdma_dev->gdma_context;
-- 
1.8.3.1