[net-next PATCH 2/8] octeontx2-pf: Add ethtool priv flag to control PAM4 on/off
From: Hariprasad Kelam <hidden>
Date: 2021-03-21 12:11:08
Also in:
lkml
Subsystem:
marvell octeontx2 physical function driver, networking drivers, the rest · Maintainers:
Sunil Goutham, Geetha sowjanya, Ratheesh Kannoth, Subbaraya Sundeep, Bharat Bhushan, Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
From: Felix Manlunas <redacted>
For PHYs that support changing modulation type (NRZ or PAM4), enable these
commands:
ethtool --set-priv-flags ethX pam4 on
ethtool --set-priv-flags ethX pam4 off # means NRZ modulation
ethtool --show-priv-flags ethX
Signed-off-by: Felix Manlunas <redacted>
Signed-off-by: Hariprasad Kelam <redacted>
Signed-off-by: Sunil Goutham <sgoutham@marvell.com>
---
.../marvell/octeontx2/nic/otx2_ethtool.c | 62 +++++++++++++++++++
1 file changed, 62 insertions(+)
diff --git a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_ethtool.c b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_ethtool.c
index f4962a97a07..552ecae1dbe 100644
--- a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_ethtool.c
+++ b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_ethtool.c@@ -22,6 +22,11 @@ #define DRV_NAME "octeontx2-nicpf" #define DRV_VF_NAME "octeontx2-nicvf" +static const char otx2_priv_flags_strings[][ETH_GSTRING_LEN] = { +#define OTX2_PRIV_FLAGS_PAM4 BIT(0) + "pam4", +}; + struct otx2_stat { char name[ETH_GSTRING_LEN]; unsigned int index;
@@ -112,6 +117,12 @@ static void otx2_get_strings(struct net_device *netdev, u32 sset, u8 *data) struct otx2_nic *pfvf = netdev_priv(netdev); int stats; + if (sset == ETH_SS_PRIV_FLAGS) { + memcpy(data, otx2_priv_flags_strings, + ARRAY_SIZE(otx2_priv_flags_strings) * ETH_GSTRING_LEN); + return; + } + if (sset != ETH_SS_STATS) return;
@@ -250,6 +261,9 @@ static int otx2_get_sset_count(struct net_device *netdev, int sset) struct otx2_nic *pfvf = netdev_priv(netdev); int qstats_count; + if (sset == ETH_SS_PRIV_FLAGS) + return ARRAY_SIZE(otx2_priv_flags_strings); + if (sset != ETH_SS_STATS) return -EINVAL;
@@ -1219,6 +1233,52 @@ static int otx2_set_link_ksettings(struct net_device *netdev, return err; } +static int otx2_set_priv_flags(struct net_device *netdev, u32 priv_flags) +{ + struct otx2_nic *pfvf = netdev_priv(netdev); + struct cgx_phy_mod_type *req; + struct cgx_fw_data *fwd; + int rc = -ENOMEM; + + fwd = otx2_get_fwdata(pfvf); + if (IS_ERR(fwd)) + return PTR_ERR(fwd); + + /* ret here if phy does not support this feature */ + if (!fwd->fwdata.phy.misc.can_change_mod_type) + return -EOPNOTSUPP; + + mutex_lock(&pfvf->mbox.lock); + req = otx2_mbox_alloc_msg_cgx_set_phy_mod_type(&pfvf->mbox); + if (!req) + goto end; + + req->mod = priv_flags & OTX2_PRIV_FLAGS_PAM4; + if (!otx2_sync_mbox_msg(&pfvf->mbox)) + rc = 0; + +end: + mutex_unlock(&pfvf->mbox.lock); + return rc; +} + +static u32 otx2_get_priv_flags(struct net_device *netdev) +{ + struct otx2_nic *pfvf = netdev_priv(netdev); + struct cgx_fw_data *rsp; + u32 priv_flags = 0; + + rsp = otx2_get_fwdata(pfvf); + + if (IS_ERR(rsp)) + return 0; + + if (rsp->fwdata.phy.misc.mod_type) + priv_flags |= OTX2_PRIV_FLAGS_PAM4; + + return priv_flags; +} + static const struct ethtool_ops otx2_ethtool_ops = { .supported_coalesce_params = ETHTOOL_COALESCE_USECS | ETHTOOL_COALESCE_MAX_FRAMES,
@@ -1250,6 +1310,8 @@ 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, + .set_priv_flags = otx2_set_priv_flags, + .get_priv_flags = otx2_get_priv_flags, }; void otx2_set_ethtool_ops(struct net_device *netdev)
--
2.17.1