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sfc: support the ethtool ksettings API properly so that 25/50/100G works
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Store and handle ethtool link mode masks within the driver instead of
 just a single u32.  However, quite a significant amount of existing code
 wants to manipulate the masks directly, and thus now uses the first
 unsigned long (i.e. mask[0]) as though it were a legacy u32 mask.  This
 is ok because all the bits that code is interested in are in the first
 32 bits of the mask; but it might be a good idea to change them in
 future to use the proper bitmap API.

Signed-off-by: Edward Cree <ecree@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Edward Cree authored and David S. Miller committed Jan 10, 2018
1 parent 702b3d5 commit c2ab85d
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Showing 5 changed files with 92 additions and 83 deletions.
43 changes: 27 additions & 16 deletions drivers/net/ethernet/sfc/efx.c
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Original file line number Diff line number Diff line change
Expand Up @@ -953,31 +953,42 @@ void efx_link_status_changed(struct efx_nic *efx)
netif_info(efx, link, efx->net_dev, "link down\n");
}

void efx_link_set_advertising(struct efx_nic *efx, u32 advertising)
void efx_link_set_advertising(struct efx_nic *efx,
const unsigned long *advertising)
{
efx->link_advertising = advertising;
if (advertising) {
if (advertising & ADVERTISED_Pause)
efx->wanted_fc |= (EFX_FC_TX | EFX_FC_RX);
else
efx->wanted_fc &= ~(EFX_FC_TX | EFX_FC_RX);
if (advertising & ADVERTISED_Asym_Pause)
efx->wanted_fc ^= EFX_FC_TX;
}
memcpy(efx->link_advertising, advertising,
sizeof(__ETHTOOL_DECLARE_LINK_MODE_MASK()));

efx->link_advertising[0] |= ADVERTISED_Autoneg;
if (advertising[0] & ADVERTISED_Pause)
efx->wanted_fc |= (EFX_FC_TX | EFX_FC_RX);
else
efx->wanted_fc &= ~(EFX_FC_TX | EFX_FC_RX);
if (advertising[0] & ADVERTISED_Asym_Pause)
efx->wanted_fc ^= EFX_FC_TX;
}

/* Equivalent to efx_link_set_advertising with all-zeroes, except does not
* force the Autoneg bit on.
*/
void efx_link_clear_advertising(struct efx_nic *efx)
{
bitmap_zero(efx->link_advertising, __ETHTOOL_LINK_MODE_MASK_NBITS);
efx->wanted_fc &= ~(EFX_FC_TX | EFX_FC_RX);
}

void efx_link_set_wanted_fc(struct efx_nic *efx, u8 wanted_fc)
{
efx->wanted_fc = wanted_fc;
if (efx->link_advertising) {
if (efx->link_advertising[0]) {
if (wanted_fc & EFX_FC_RX)
efx->link_advertising |= (ADVERTISED_Pause |
ADVERTISED_Asym_Pause);
efx->link_advertising[0] |= (ADVERTISED_Pause |
ADVERTISED_Asym_Pause);
else
efx->link_advertising &= ~(ADVERTISED_Pause |
ADVERTISED_Asym_Pause);
efx->link_advertising[0] &= ~(ADVERTISED_Pause |
ADVERTISED_Asym_Pause);
if (wanted_fc & EFX_FC_TX)
efx->link_advertising ^= ADVERTISED_Asym_Pause;
efx->link_advertising[0] ^= ADVERTISED_Asym_Pause;
}
}

Expand Down
4 changes: 3 additions & 1 deletion drivers/net/ethernet/sfc/efx.h
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Original file line number Diff line number Diff line change
Expand Up @@ -258,7 +258,9 @@ static inline void efx_schedule_channel_irq(struct efx_channel *channel)
}

void efx_link_status_changed(struct efx_nic *efx);
void efx_link_set_advertising(struct efx_nic *efx, u32);
void efx_link_set_advertising(struct efx_nic *efx,
const unsigned long *advertising);
void efx_link_clear_advertising(struct efx_nic *efx);
void efx_link_set_wanted_fc(struct efx_nic *efx, u8);

static inline void efx_device_detach_sync(struct efx_nic *efx)
Expand Down
6 changes: 3 additions & 3 deletions drivers/net/ethernet/sfc/ethtool.c
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Original file line number Diff line number Diff line change
Expand Up @@ -720,7 +720,7 @@ static int efx_ethtool_set_pauseparam(struct net_device *net_dev,
goto out;
}

if ((wanted_fc & EFX_FC_AUTO) && !efx->link_advertising) {
if ((wanted_fc & EFX_FC_AUTO) && !efx->link_advertising[0]) {
netif_dbg(efx, drv, efx->net_dev,
"Autonegotiation is disabled\n");
rc = -EINVAL;
Expand All @@ -732,10 +732,10 @@ static int efx_ethtool_set_pauseparam(struct net_device *net_dev,
(wanted_fc & EFX_FC_TX) && !(efx->wanted_fc & EFX_FC_TX))
efx->type->prepare_enable_fc_tx(efx);

old_adv = efx->link_advertising;
old_adv = efx->link_advertising[0];
old_fc = efx->wanted_fc;
efx_link_set_wanted_fc(efx, wanted_fc);
if (efx->link_advertising != old_adv ||
if (efx->link_advertising[0] != old_adv ||
(efx->wanted_fc ^ old_fc) & EFX_FC_AUTO) {
rc = efx->phy_op->reconfigure(efx);
if (rc) {
Expand Down
120 changes: 58 additions & 62 deletions drivers/net/ethernet/sfc/mcdi_port.c
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Original file line number Diff line number Diff line change
Expand Up @@ -171,89 +171,96 @@ static int efx_mcdi_mdio_write(struct net_device *net_dev,
return 0;
}

static u32 mcdi_to_ethtool_cap(u32 media, u32 cap)
static void mcdi_to_ethtool_linkset(u32 media, u32 cap, unsigned long *linkset)
{
u32 result = 0;
#define SET_BIT(name) __set_bit(ETHTOOL_LINK_MODE_ ## name ## _BIT, \
linkset)

bitmap_zero(linkset, __ETHTOOL_LINK_MODE_MASK_NBITS);
switch (media) {
case MC_CMD_MEDIA_KX4:
result |= SUPPORTED_Backplane;
SET_BIT(Backplane);
if (cap & (1 << MC_CMD_PHY_CAP_1000FDX_LBN))
result |= SUPPORTED_1000baseKX_Full;
SET_BIT(1000baseKX_Full);
if (cap & (1 << MC_CMD_PHY_CAP_10000FDX_LBN))
result |= SUPPORTED_10000baseKX4_Full;
SET_BIT(10000baseKX4_Full);
if (cap & (1 << MC_CMD_PHY_CAP_40000FDX_LBN))
result |= SUPPORTED_40000baseKR4_Full;
SET_BIT(40000baseKR4_Full);
break;

case MC_CMD_MEDIA_XFP:
case MC_CMD_MEDIA_SFP_PLUS:
case MC_CMD_MEDIA_QSFP_PLUS:
result |= SUPPORTED_FIBRE;
SET_BIT(FIBRE);
if (cap & (1 << MC_CMD_PHY_CAP_1000FDX_LBN))
result |= SUPPORTED_1000baseT_Full;
SET_BIT(1000baseT_Full);
if (cap & (1 << MC_CMD_PHY_CAP_10000FDX_LBN))
result |= SUPPORTED_10000baseT_Full;
SET_BIT(10000baseT_Full);
if (cap & (1 << MC_CMD_PHY_CAP_40000FDX_LBN))
result |= SUPPORTED_40000baseCR4_Full;
SET_BIT(40000baseCR4_Full);
break;

case MC_CMD_MEDIA_BASE_T:
result |= SUPPORTED_TP;
SET_BIT(TP);
if (cap & (1 << MC_CMD_PHY_CAP_10HDX_LBN))
result |= SUPPORTED_10baseT_Half;
SET_BIT(10baseT_Half);
if (cap & (1 << MC_CMD_PHY_CAP_10FDX_LBN))
result |= SUPPORTED_10baseT_Full;
SET_BIT(10baseT_Full);
if (cap & (1 << MC_CMD_PHY_CAP_100HDX_LBN))
result |= SUPPORTED_100baseT_Half;
SET_BIT(100baseT_Half);
if (cap & (1 << MC_CMD_PHY_CAP_100FDX_LBN))
result |= SUPPORTED_100baseT_Full;
SET_BIT(100baseT_Full);
if (cap & (1 << MC_CMD_PHY_CAP_1000HDX_LBN))
result |= SUPPORTED_1000baseT_Half;
SET_BIT(1000baseT_Half);
if (cap & (1 << MC_CMD_PHY_CAP_1000FDX_LBN))
result |= SUPPORTED_1000baseT_Full;
SET_BIT(1000baseT_Full);
if (cap & (1 << MC_CMD_PHY_CAP_10000FDX_LBN))
result |= SUPPORTED_10000baseT_Full;
SET_BIT(10000baseT_Full);
break;
}

if (cap & (1 << MC_CMD_PHY_CAP_PAUSE_LBN))
result |= SUPPORTED_Pause;
SET_BIT(Pause);
if (cap & (1 << MC_CMD_PHY_CAP_ASYM_LBN))
result |= SUPPORTED_Asym_Pause;
SET_BIT(Asym_Pause);
if (cap & (1 << MC_CMD_PHY_CAP_AN_LBN))
result |= SUPPORTED_Autoneg;
SET_BIT(Autoneg);

return result;
#undef SET_BIT
}

static u32 ethtool_to_mcdi_cap(u32 cap)
static u32 ethtool_linkset_to_mcdi_cap(const unsigned long *linkset)
{
u32 result = 0;

if (cap & SUPPORTED_10baseT_Half)
#define TEST_BIT(name) test_bit(ETHTOOL_LINK_MODE_ ## name ## _BIT, \
linkset)

if (TEST_BIT(10baseT_Half))
result |= (1 << MC_CMD_PHY_CAP_10HDX_LBN);
if (cap & SUPPORTED_10baseT_Full)
if (TEST_BIT(10baseT_Full))
result |= (1 << MC_CMD_PHY_CAP_10FDX_LBN);
if (cap & SUPPORTED_100baseT_Half)
if (TEST_BIT(100baseT_Half))
result |= (1 << MC_CMD_PHY_CAP_100HDX_LBN);
if (cap & SUPPORTED_100baseT_Full)
if (TEST_BIT(100baseT_Full))
result |= (1 << MC_CMD_PHY_CAP_100FDX_LBN);
if (cap & SUPPORTED_1000baseT_Half)
if (TEST_BIT(1000baseT_Half))
result |= (1 << MC_CMD_PHY_CAP_1000HDX_LBN);
if (cap & (SUPPORTED_1000baseT_Full | SUPPORTED_1000baseKX_Full))
if (TEST_BIT(1000baseT_Full) || TEST_BIT(1000baseKX_Full))
result |= (1 << MC_CMD_PHY_CAP_1000FDX_LBN);
if (cap & (SUPPORTED_10000baseT_Full | SUPPORTED_10000baseKX4_Full))
if (TEST_BIT(10000baseT_Full) || TEST_BIT(10000baseKX4_Full))
result |= (1 << MC_CMD_PHY_CAP_10000FDX_LBN);
if (cap & (SUPPORTED_40000baseCR4_Full | SUPPORTED_40000baseKR4_Full))
if (TEST_BIT(40000baseCR4_Full) || TEST_BIT(40000baseKR4_Full))
result |= (1 << MC_CMD_PHY_CAP_40000FDX_LBN);
if (cap & SUPPORTED_Pause)
if (TEST_BIT(Pause))
result |= (1 << MC_CMD_PHY_CAP_PAUSE_LBN);
if (cap & SUPPORTED_Asym_Pause)
if (TEST_BIT(Asym_Pause))
result |= (1 << MC_CMD_PHY_CAP_ASYM_LBN);
if (cap & SUPPORTED_Autoneg)
if (TEST_BIT(Autoneg))
result |= (1 << MC_CMD_PHY_CAP_AN_LBN);

#undef TEST_BIT

return result;
}

Expand Down Expand Up @@ -285,7 +292,7 @@ static u32 efx_get_mcdi_phy_flags(struct efx_nic *efx)
return flags;
}

static u32 mcdi_to_ethtool_media(u32 media)
static u8 mcdi_to_ethtool_media(u32 media)
{
switch (media) {
case MC_CMD_MEDIA_XAUI:
Expand Down Expand Up @@ -371,8 +378,8 @@ static int efx_mcdi_phy_probe(struct efx_nic *efx)

caps = MCDI_DWORD(outbuf, GET_LINK_OUT_CAP);
if (caps & (1 << MC_CMD_PHY_CAP_AN_LBN))
efx->link_advertising =
mcdi_to_ethtool_cap(phy_data->media, caps);
mcdi_to_ethtool_linkset(phy_data->media, caps,
efx->link_advertising);
else
phy_data->forced_cap = caps;

Expand Down Expand Up @@ -435,8 +442,8 @@ static int efx_mcdi_phy_probe(struct efx_nic *efx)
int efx_mcdi_port_reconfigure(struct efx_nic *efx)
{
struct efx_mcdi_phy_data *phy_cfg = efx->phy_data;
u32 caps = (efx->link_advertising ?
ethtool_to_mcdi_cap(efx->link_advertising) :
u32 caps = (efx->link_advertising[0] ?
ethtool_linkset_to_mcdi_cap(efx->link_advertising) :
phy_cfg->forced_cap);

return efx_mcdi_set_link(efx, caps, efx_get_mcdi_phy_flags(efx),
Expand Down Expand Up @@ -509,34 +516,28 @@ static void efx_mcdi_phy_get_link_ksettings(struct efx_nic *efx,
struct efx_mcdi_phy_data *phy_cfg = efx->phy_data;
MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_LINK_OUT_LEN);
int rc;
u32 supported, advertising, lp_advertising;

supported = mcdi_to_ethtool_cap(phy_cfg->media, phy_cfg->supported_cap);
advertising = efx->link_advertising;
cmd->base.speed = efx->link_state.speed;
cmd->base.duplex = efx->link_state.fd;
cmd->base.port = mcdi_to_ethtool_media(phy_cfg->media);
cmd->base.phy_address = phy_cfg->port;
cmd->base.autoneg = !!(efx->link_advertising & ADVERTISED_Autoneg);
cmd->base.autoneg = !!(efx->link_advertising[0] & ADVERTISED_Autoneg);
cmd->base.mdio_support = (efx->mdio.mode_support &
(MDIO_SUPPORTS_C45 | MDIO_SUPPORTS_C22));

ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported,
supported);
ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising,
advertising);
mcdi_to_ethtool_linkset(phy_cfg->media, phy_cfg->supported_cap,
cmd->link_modes.supported);
memcpy(cmd->link_modes.advertising, efx->link_advertising,
sizeof(__ETHTOOL_DECLARE_LINK_MODE_MASK()));

BUILD_BUG_ON(MC_CMD_GET_LINK_IN_LEN != 0);
rc = efx_mcdi_rpc(efx, MC_CMD_GET_LINK, NULL, 0,
outbuf, sizeof(outbuf), NULL);
if (rc)
return;
lp_advertising =
mcdi_to_ethtool_cap(phy_cfg->media,
MCDI_DWORD(outbuf, GET_LINK_OUT_LP_CAP));

ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.lp_advertising,
lp_advertising);
mcdi_to_ethtool_linkset(phy_cfg->media,
MCDI_DWORD(outbuf, GET_LINK_OUT_LP_CAP),
cmd->link_modes.lp_advertising);
}

static int
Expand All @@ -546,14 +547,10 @@ efx_mcdi_phy_set_link_ksettings(struct efx_nic *efx,
struct efx_mcdi_phy_data *phy_cfg = efx->phy_data;
u32 caps;
int rc;
u32 advertising;

ethtool_convert_link_mode_to_legacy_u32(&advertising,
cmd->link_modes.advertising);

if (cmd->base.autoneg) {
caps = (ethtool_to_mcdi_cap(advertising) |
1 << MC_CMD_PHY_CAP_AN_LBN);
caps = (ethtool_linkset_to_mcdi_cap(cmd->link_modes.advertising) |
1 << MC_CMD_PHY_CAP_AN_LBN);
} else if (cmd->base.duplex) {
switch (cmd->base.speed) {
case 10: caps = 1 << MC_CMD_PHY_CAP_10FDX_LBN; break;
Expand Down Expand Up @@ -581,11 +578,10 @@ efx_mcdi_phy_set_link_ksettings(struct efx_nic *efx,
return rc;

if (cmd->base.autoneg) {
efx_link_set_advertising(
efx, advertising | ADVERTISED_Autoneg);
efx_link_set_advertising(efx, cmd->link_modes.advertising);
phy_cfg->forced_cap = 0;
} else {
efx_link_set_advertising(efx, 0);
efx_link_clear_advertising(efx);
phy_cfg->forced_cap = caps;
}
return 0;
Expand Down
2 changes: 1 addition & 1 deletion drivers/net/ethernet/sfc/net_driver.h
View file
Original file line number Diff line number Diff line change
Expand Up @@ -937,7 +937,7 @@ struct efx_nic {
unsigned int mdio_bus;
enum efx_phy_mode phy_mode;

u32 link_advertising;
__ETHTOOL_DECLARE_LINK_MODE_MASK(link_advertising);
struct efx_link_state link_state;
unsigned int n_link_state_changes;

Expand Down

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