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bnxt_en: ethtool: support PAM4 link speeds up to 200G 

Add ethtool PAM4 link modes for:
        50000baseCR_Full
        100000baseCR2_Full
        200000baseCR4_Full

Signed-off-by: Edwin Peer <edwin.peer@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Edwin Peer 2020-09-27 13:42:14 -04:00 committed by David S. Miller
parent d058426ea8
commit 532262ba3b
1 changed files with 63 additions and 8 deletions
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71
drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c
View File

@ -1507,6 +1507,32 @@ u32 _bnxt_fw_to_ethtool_adv_spds(u16 fw_speeds, u8 fw_pause)
(fw_speeds) |= BNXT_LINK_SPEED_MSK_100GB; \
}
#define BNXT_FW_TO_ETHTOOL_PAM4_SPDS(fw_speeds, lk_ksettings, name) \
{ \
if ((fw_speeds) & BNXT_LINK_PAM4_SPEED_MSK_50GB) \
ethtool_link_ksettings_add_link_mode(lk_ksettings, name,\
50000baseCR_Full); \
if ((fw_speeds) & BNXT_LINK_PAM4_SPEED_MSK_100GB) \
ethtool_link_ksettings_add_link_mode(lk_ksettings, name,\
100000baseCR2_Full);\
if ((fw_speeds) & BNXT_LINK_PAM4_SPEED_MSK_200GB) \
ethtool_link_ksettings_add_link_mode(lk_ksettings, name,\
200000baseCR4_Full);\
}
#define BNXT_ETHTOOL_TO_FW_PAM4_SPDS(fw_speeds, lk_ksettings, name) \
{ \
if (ethtool_link_ksettings_test_link_mode(lk_ksettings, name, \
50000baseCR_Full)) \
(fw_speeds) |= BNXT_LINK_PAM4_SPEED_MSK_50GB; \
if (ethtool_link_ksettings_test_link_mode(lk_ksettings, name, \
100000baseCR2_Full)) \
(fw_speeds) |= BNXT_LINK_PAM4_SPEED_MSK_100GB; \
if (ethtool_link_ksettings_test_link_mode(lk_ksettings, name, \
200000baseCR4_Full)) \
(fw_speeds) |= BNXT_LINK_PAM4_SPEED_MSK_200GB; \
}
static void bnxt_fw_to_ethtool_advertised_spds(struct bnxt_link_info *link_info,
struct ethtool_link_ksettings *lk_ksettings)
{
@ -1517,6 +1543,8 @@ static void bnxt_fw_to_ethtool_advertised_spds(struct bnxt_link_info *link_info,
fw_pause = link_info->auto_pause_setting;
BNXT_FW_TO_ETHTOOL_SPDS(fw_speeds, fw_pause, lk_ksettings, advertising);
fw_speeds = link_info->advertising_pam4;
BNXT_FW_TO_ETHTOOL_PAM4_SPDS(fw_speeds, lk_ksettings, advertising);
}
static void bnxt_fw_to_ethtool_lp_adv(struct bnxt_link_info *link_info,
@ -1530,6 +1558,8 @@ static void bnxt_fw_to_ethtool_lp_adv(struct bnxt_link_info *link_info,
BNXT_FW_TO_ETHTOOL_SPDS(fw_speeds, fw_pause, lk_ksettings,
lp_advertising);
fw_speeds = link_info->lp_auto_pam4_link_speeds;
BNXT_FW_TO_ETHTOOL_PAM4_SPDS(fw_speeds, lk_ksettings, lp_advertising);
}
static void bnxt_fw_to_ethtool_support_spds(struct bnxt_link_info *link_info,
@ -1538,12 +1568,15 @@ static void bnxt_fw_to_ethtool_support_spds(struct bnxt_link_info *link_info,
u16 fw_speeds = link_info->support_speeds;
BNXT_FW_TO_ETHTOOL_SPDS(fw_speeds, 0, lk_ksettings, supported);
fw_speeds = link_info->support_pam4_speeds;
BNXT_FW_TO_ETHTOOL_PAM4_SPDS(fw_speeds, lk_ksettings, supported);
ethtool_link_ksettings_add_link_mode(lk_ksettings, supported, Pause);
ethtool_link_ksettings_add_link_mode(lk_ksettings, supported,
Asym_Pause);
if (link_info->support_auto_speeds)
if (link_info->support_auto_speeds ||
link_info->support_pam4_auto_speeds)
ethtool_link_ksettings_add_link_mode(lk_ksettings, supported,
Autoneg);
}
@ -1640,7 +1673,9 @@ static int bnxt_force_link_speed(struct net_device *dev, u32 ethtool_speed)
{
struct bnxt *bp = netdev_priv(dev);
struct bnxt_link_info *link_info = &bp->link_info;
u16 support_pam4_spds = link_info->support_pam4_speeds;
u16 support_spds = link_info->support_speeds;
u8 sig_mode = BNXT_SIG_MODE_NRZ;
u16 fw_speed = 0;
switch (ethtool_speed) {
@ -1673,12 +1708,26 @@ static int bnxt_force_link_speed(struct net_device *dev, u32 ethtool_speed)
fw_speed = PORT_PHY_CFG_REQ_FORCE_LINK_SPEED_40GB;
break;
case SPEED_50000:
if (support_spds & BNXT_LINK_SPEED_MSK_50GB)
if (support_spds & BNXT_LINK_SPEED_MSK_50GB) {
fw_speed = PORT_PHY_CFG_REQ_FORCE_LINK_SPEED_50GB;
} else if (support_pam4_spds & BNXT_LINK_PAM4_SPEED_MSK_50GB) {
fw_speed = PORT_PHY_CFG_REQ_FORCE_PAM4_LINK_SPEED_50GB;
sig_mode = BNXT_SIG_MODE_PAM4;
}
break;
case SPEED_100000:
if (support_spds & BNXT_LINK_SPEED_MSK_100GB)
if (support_spds & BNXT_LINK_SPEED_MSK_100GB) {
fw_speed = PORT_PHY_CFG_REQ_FORCE_LINK_SPEED_100GB;
} else if (support_pam4_spds & BNXT_LINK_PAM4_SPEED_MSK_100GB) {
fw_speed = PORT_PHY_CFG_REQ_FORCE_PAM4_LINK_SPEED_100GB;
sig_mode = BNXT_SIG_MODE_PAM4;
}
break;
case SPEED_200000:
if (support_pam4_spds & BNXT_LINK_PAM4_SPEED_MSK_200GB) {
fw_speed = PORT_PHY_CFG_REQ_FORCE_PAM4_LINK_SPEED_200GB;
sig_mode = BNXT_SIG_MODE_PAM4;
}
break;
}
@ -1688,9 +1737,11 @@ static int bnxt_force_link_speed(struct net_device *dev, u32 ethtool_speed)
}
link_info->req_link_speed = fw_speed;
link_info->req_signal_mode = sig_mode;
link_info->req_duplex = BNXT_LINK_DUPLEX_FULL;
link_info->autoneg = 0;
link_info->advertising = 0;
link_info->advertising_pam4 = 0;
return 0;
}
@ -1724,7 +1775,6 @@ static int bnxt_set_link_ksettings(struct net_device *dev,
struct bnxt_link_info *link_info = &bp->link_info;
const struct ethtool_link_settings *base = &lk_ksettings->base;
bool set_pause = false;
u16 fw_advertising = 0;
u32 speed;
int rc = 0;
@ -1733,13 +1783,18 @@ static int bnxt_set_link_ksettings(struct net_device *dev,
mutex_lock(&bp->link_lock);
if (base->autoneg == AUTONEG_ENABLE) {
BNXT_ETHTOOL_TO_FW_SPDS(fw_advertising, lk_ksettings,
link_info->advertising = 0;
link_info->advertising_pam4 = 0;
BNXT_ETHTOOL_TO_FW_SPDS(link_info->advertising, lk_ksettings,
advertising);
BNXT_ETHTOOL_TO_FW_PAM4_SPDS(link_info->advertising_pam4,
lk_ksettings, advertising);
link_info->autoneg |= BNXT_AUTONEG_SPEED;
if (!fw_advertising)
if (!link_info->advertising && !link_info->advertising_pam4) {
link_info->advertising = link_info->support_auto_speeds;
else
link_info->advertising = fw_advertising;
link_info->advertising_pam4 =
link_info->support_pam4_auto_speeds;
}
/* any change to autoneg will cause link change, therefore the
* driver should put back the original pause setting in autoneg
*/