linux-kernel - [net-next PATCH] octeontx2-pf: Add support to read eeprom information

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Date: Thu, 25 Jan 2024 16:51:33 +0530
From: Hariprasad Kelam <hkelam@...vell.com>
To: <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>
CC: <pabeni@...hat.com>, <kuba@...nel.org>, <edumazet@...gle.com>,
        <davem@...emloft.net>, <sbhatta@...vell.com>, <gakula@...vell.com>,
        <sgoutham@...vell.com>
Subject: [net-next PATCH] octeontx2-pf: Add support to read eeprom information

Add support to read/decode EEPROM module information using ethtool.

Usage: ethtool -m <interface>

Signed-off-by: Christina Jacob <cjacob@...vell.com>
Signed-off-by: Hariprasad Kelam <hkelam@...vell.com>
Signed-off-by: Sunil Goutham <sgoutham@...vell.com>
---
 .../marvell/octeontx2/nic/otx2_ethtool.c      | 33 +++++++++++++++++++
 1 file changed, 33 insertions(+)

diff --git a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_ethtool.c b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_ethtool.c
index 2928898c7f8d..8e4e22a2817b 100644
--- a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_ethtool.c
+++ b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_ethtool.c
@@ -1185,6 +1185,37 @@ static void otx2_get_link_mode_info(u64 link_mode_bmap,
 			      otx2_link_modes);
 }
 
+static int otx2_get_module_info(struct net_device *netdev,
+				struct ethtool_modinfo *modinfo)
+{
+	struct otx2_nic *pfvf = netdev_priv(netdev);
+	struct cgx_fw_data *rsp;
+
+	rsp = otx2_get_fwdata(pfvf);
+	if (IS_ERR(rsp))
+		return PTR_ERR(rsp);
+
+	modinfo->type = rsp->fwdata.sfp_eeprom.sff_id;
+	modinfo->eeprom_len = SFP_EEPROM_SIZE;
+	return 0;
+}
+
+static int otx2_get_module_eeprom(struct net_device *netdev,
+				  struct ethtool_eeprom *ee,
+				  u8 *data)
+{
+	struct otx2_nic *pfvf = netdev_priv(netdev);
+	struct cgx_fw_data *rsp;
+
+	rsp = otx2_get_fwdata(pfvf);
+	if (IS_ERR(rsp))
+		return PTR_ERR(rsp);
+
+	memcpy(data, &rsp->fwdata.sfp_eeprom.buf, ee->len);
+
+	return 0;
+}
+
 static int otx2_get_link_ksettings(struct net_device *netdev,
 				   struct ethtool_link_ksettings *cmd)
 {
@@ -1343,6 +1374,8 @@ static const struct ethtool_ops otx2_ethtool_ops = {
 	.set_fecparam		= otx2_set_fecparam,
 	.get_link_ksettings     = otx2_get_link_ksettings,
 	.set_link_ksettings     = otx2_set_link_ksettings,
+	.get_module_info	= otx2_get_module_info,
+	.get_module_eeprom	= otx2_get_module_eeprom,
 };
 
 void otx2_set_ethtool_ops(struct net_device *netdev)
-- 
2.17.1