mirrors/linux
2
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git synced 2026-05-07 17:27:11 -04:00
Code Issues Packages Projects Releases Wiki Activity

i40e: Add support for ethtool -s <interface> speed <speed in Mb>

Browse Source 
Add ability to change speed through ethtool -s <interface> speed <speed in Mb>
Driver advertises all link modes that support requested speed.
Autoneg must be set off e.g.:
	ethtool -s <interface> autoneg off speed <speed in Mb>.

Add helper function that translate speed in Mb to
enum i40e_aq_link_speed and compare it to supported speeds from
given ethtool_link_ksettings. Add in i40e_set_link_ksettings hold
for requested speed and set copy_ks.base.speed to safe_ks.base.speed
to be sure that user is not changing unsupported setting.
In i40e_speed_to_link_speed compare requested speed with supported
speeds. Set speed to requested speed.

Signed-off-by: Norbert Zulinski <norbertx.zulinski@intel.com>
Signed-off-by: Mateusz Palczewski <mateusz.palczewski@intel.com>
Tested-by: Dave Switzer <david.switzer@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
This commit is contained in:
Mateusz Palczewski
2022-05-11 12:21:28 +02:00
committed by Tony Nguyen
parent 8720bd951b
commit 7f72d92314
1 changed files with 90 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

90
drivers/net/ethernet/intel/i40e/i40e_ethtool.c
View File

@@ -1143,6 +1143,71 @@ static int i40e_get_link_ksettings(struct net_device *netdev,
return 0;
}
#define I40E_LBIT_SIZE 8
/**
* i40e_speed_to_link_speed - Translate decimal speed to i40e_aq_link_speed
* @speed: speed in decimal
* @ks: ethtool ksettings
*
* Return i40e_aq_link_speed based on speed
**/
static enum i40e_aq_link_speed
i40e_speed_to_link_speed(__u32 speed, const struct ethtool_link_ksettings *ks)
{
enum i40e_aq_link_speed link_speed = I40E_LINK_SPEED_UNKNOWN;
bool speed_changed = false;
int i, j;
static const struct {
__u32 speed;
enum i40e_aq_link_speed link_speed;
__u8 bit[I40E_LBIT_SIZE];
} i40e_speed_lut[] = {
#define I40E_LBIT(mode) ETHTOOL_LINK_MODE_ ## mode ##_Full_BIT
{SPEED_100, I40E_LINK_SPEED_100MB, {I40E_LBIT(100baseT)} },
{SPEED_1000, I40E_LINK_SPEED_1GB,
{I40E_LBIT(1000baseT), I40E_LBIT(1000baseX),
I40E_LBIT(1000baseKX)} },
{SPEED_10000, I40E_LINK_SPEED_10GB,
{I40E_LBIT(10000baseT), I40E_LBIT(10000baseKR),
I40E_LBIT(10000baseLR), I40E_LBIT(10000baseCR),
I40E_LBIT(10000baseSR), I40E_LBIT(10000baseKX4)} },
{SPEED_25000, I40E_LINK_SPEED_25GB,
{I40E_LBIT(25000baseCR), I40E_LBIT(25000baseKR),
I40E_LBIT(25000baseSR)} },
{SPEED_40000, I40E_LINK_SPEED_40GB,
{I40E_LBIT(40000baseKR4), I40E_LBIT(40000baseCR4),
I40E_LBIT(40000baseSR4), I40E_LBIT(40000baseLR4)} },
{SPEED_20000, I40E_LINK_SPEED_20GB,
{I40E_LBIT(20000baseKR2)} },
{SPEED_2500, I40E_LINK_SPEED_2_5GB, {I40E_LBIT(2500baseT)} },
{SPEED_5000, I40E_LINK_SPEED_5GB, {I40E_LBIT(2500baseT)} }
#undef I40E_LBIT
};
for (i = 0; i < ARRAY_SIZE(i40e_speed_lut); i++) {
if (i40e_speed_lut[i].speed == speed) {
for (j = 0; j < I40E_LBIT_SIZE; j++) {
if (test_bit(i40e_speed_lut[i].bit[j],
ks->link_modes.supported)) {
speed_changed = true;
break;
}
if (!i40e_speed_lut[i].bit[j])
break;
}
if (speed_changed) {
link_speed = i40e_speed_lut[i].link_speed;
break;
}
}
}
return link_speed;
}
#undef I40E_LBIT_SIZE
/**
* i40e_set_link_ksettings - Set Speed and Duplex
* @netdev: network interface device structure
@@ -1159,12 +1224,14 @@ static int i40e_set_link_ksettings(struct net_device *netdev,
struct ethtool_link_ksettings copy_ks;
struct i40e_aq_set_phy_config config;
struct i40e_pf *pf = np->vsi->back;
enum i40e_aq_link_speed link_speed;
struct i40e_vsi *vsi = np->vsi;
struct i40e_hw *hw = &pf->hw;
bool autoneg_changed = false;
i40e_status status = 0;
int timeout = 50;
int err = 0;
__u32 speed;
u8 autoneg;
/* Changing port settings is not supported if this isn't the
@@ -1197,6 +1264,7 @@ static int i40e_set_link_ksettings(struct net_device *netdev,
/* save autoneg out of ksettings */
autoneg = copy_ks.base.autoneg;
speed = copy_ks.base.speed;
/* get our own copy of the bits to check against */
memset(&safe_ks, 0, sizeof(struct ethtool_link_ksettings));
@@ -1215,6 +1283,7 @@ static int i40e_set_link_ksettings(struct net_device *netdev,
/* set autoneg back to what it currently is */
copy_ks.base.autoneg = safe_ks.base.autoneg;
copy_ks.base.speed = safe_ks.base.speed;
/* If copy_ks.base and safe_ks.base are not the same now, then they are
* trying to set something that we do not support.
@@ -1331,6 +1400,27 @@ static int i40e_set_link_ksettings(struct net_device *netdev,
40000baseLR4_Full))
config.link_speed |= I40E_LINK_SPEED_40GB;
/* Autonegotiation must be disabled to change speed */
if ((speed != SPEED_UNKNOWN && safe_ks.base.speed != speed) &&
(autoneg == AUTONEG_DISABLE ||
(safe_ks.base.autoneg == AUTONEG_DISABLE && !autoneg_changed))) {
link_speed = i40e_speed_to_link_speed(speed, ks);
if (link_speed == I40E_LINK_SPEED_UNKNOWN) {
netdev_info(netdev, "Given speed is not supported\n");
err = -EOPNOTSUPP;
goto done;
} else {
config.link_speed = link_speed;
}
} else {
if (safe_ks.base.speed != speed) {
netdev_info(netdev,
"Unable to set speed, disable autoneg\n");
err = -EOPNOTSUPP;
goto done;
}
}
/* If speed didn't get set, set it to what it currently is.
* This is needed because if advertise is 0 (as it is when autoneg
* is disabled) then speed won't get set.