octeontx2-af: Add devlink suppoort to af driver

Add devlink support to AF driver. Basic devlink support is added.
Currently info_get is the only supported devlink ops.

devlink ouptput looks like this
 # devlink dev
 pci/0002:01:00.0
 # devlink dev info
 pci/0002:01:00.0:
  driver octeontx2-af
 #

Signed-off-by: Sunil Kovvuri Goutham <sgoutham@marvell.com>
Signed-off-by: Jerin Jacob <jerinj@marvell.com>
Signed-off-by: George Cherian <george.cherian@marvell.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

1 files changed, 64 insertions, 0 deletions

diff --git a/drivers/net/ethernet/marvell/octeontx2/af/rvu_devlink.c b/drivers/net/ethernet/marvell/octeontx2/af/rvu_devlink.c
new file mode 100644
index 000000000000..5dabca04a34b
--- /dev/null
+++ b/drivers/net/ethernet/marvell/octeontx2/af/rvu_devlink.c
@@ -0,0 +1,64 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Marvell OcteonTx2 RVU Devlink
+ *
+ * Copyright (C) 2020 Marvell.
+ *
+ */
+
+#include "rvu.h"
+
+#define DRV_NAME "octeontx2-af"
+
+static int rvu_devlink_info_get(struct devlink *devlink, struct devlink_info_req *req,
+				struct netlink_ext_ack *extack)
+{
+	return devlink_info_driver_name_put(req, DRV_NAME);
+}
+
+static const struct devlink_ops rvu_devlink_ops = {
+	.info_get = rvu_devlink_info_get,
+};
+
+int rvu_register_dl(struct rvu *rvu)
+{
+	struct rvu_devlink *rvu_dl;
+	struct devlink *dl;
+	int err;
+
+	rvu_dl = kzalloc(sizeof(*rvu_dl), GFP_KERNEL);
+	if (!rvu_dl)
+		return -ENOMEM;
+
+	dl = devlink_alloc(&rvu_devlink_ops, sizeof(struct rvu_devlink));
+	if (!dl) {
+		dev_warn(rvu->dev, "devlink_alloc failed\n");
+		kfree(rvu_dl);
+		return -ENOMEM;
+	}
+
+	err = devlink_register(dl, rvu->dev);
+	if (err) {
+		dev_err(rvu->dev, "devlink register failed with error %d\n", err);
+		devlink_free(dl);
+		kfree(rvu_dl);
+		return err;
+	}
+
+	rvu_dl->dl = dl;
+	rvu_dl->rvu = rvu;
+	rvu->rvu_dl = rvu_dl;
+	return 0;
+}
+
+void rvu_unregister_dl(struct rvu *rvu)
+{
+	struct rvu_devlink *rvu_dl = rvu->rvu_dl;
+	struct devlink *dl = rvu_dl->dl;
+
+	if (!dl)
+		return;
+
+	devlink_unregister(dl);
+	devlink_free(dl);
+	kfree(rvu_dl);
+}