netdev - [RFC net-next 3/6] nfp: devlink: report serial number

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Message-Id: <20190115005009.16025-4-jakub.kicinski@netronome.com>
Date:   Mon, 14 Jan 2019 16:50:05 -0800
From:   Jakub Kicinski <jakub.kicinski@...ronome.com>
To:     davem@...emloft.net
Cc:     netdev@...r.kernel.org, oss-drivers@...ronome.com,
        jiri@...nulli.us, Jakub Kicinski <jakub.kicinski@...ronome.com>
Subject: [RFC net-next 3/6] nfp: devlink: report serial number

Report serial number via the info devlink command.

Signed-off-by: Jakub Kicinski <jakub.kicinski@...ronome.com>
---
 .../net/ethernet/netronome/nfp/nfp_devlink.c  | 22 +++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/drivers/net/ethernet/netronome/nfp/nfp_devlink.c b/drivers/net/ethernet/netronome/nfp/nfp_devlink.c
index 808647ec3573..4422da939937 100644
--- a/drivers/net/ethernet/netronome/nfp/nfp_devlink.c
+++ b/drivers/net/ethernet/netronome/nfp/nfp_devlink.c
@@ -4,6 +4,7 @@
 #include <linux/rtnetlink.h>
 #include <net/devlink.h>
 
+#include "nfpcore/nfp_cpp.h"
 #include "nfpcore/nfp_nsp.h"
 #include "nfp_app.h"
 #include "nfp_main.h"
@@ -171,6 +172,26 @@ static int nfp_devlink_eswitch_mode_set(struct devlink *devlink, u16 mode,
 	return ret;
 }
 
+static int
+nfp_devlink_serial_get(struct devlink *devlink, u8 *buf, size_t buf_len,
+		       size_t *len, struct netlink_ext_ack *extack)
+{
+	struct nfp_pf *pf = devlink_priv(devlink);
+	const u8 *serial;
+	int ret;
+
+	ret = nfp_cpp_serial(pf->cpp, &serial);
+	if (ret < 0)
+		return ret;
+
+	if (buf_len < ret)
+		return -EINVAL;
+	*len = ret;
+
+	memcpy(buf, serial, *len);
+	return 0;
+}
+
 const struct devlink_ops nfp_devlink_ops = {
 	.port_split		= nfp_devlink_port_split,
 	.port_unsplit		= nfp_devlink_port_unsplit,
@@ -178,6 +199,7 @@ const struct devlink_ops nfp_devlink_ops = {
 	.sb_pool_set		= nfp_devlink_sb_pool_set,
 	.eswitch_mode_get	= nfp_devlink_eswitch_mode_get,
 	.eswitch_mode_set	= nfp_devlink_eswitch_mode_set,
+	.serial_get		= nfp_devlink_serial_get,
 };
 
 int nfp_devlink_port_register(struct nfp_app *app, struct nfp_port *port)
-- 
2.19.2