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nvethernet: Add support for EEE LPI

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1. Add statistics for keeping track of EEE LPI entry/exit.
Invoke the API to configure EEE LPI in HW based on the PHY link
status and EEE support in PHY.

2. Add support to enable/disable EEE from ethtool.

Bug 2594864

Change-Id: Ib7703e087eb83269a351689f8d406564f799709a
Signed-off-by: Srinivas Ramachandran <srinivasra@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/2160786
Reviewed-by: Ajay Gupta <ajayg@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Mohan Thadikamalla <mohant@nvidia.com>
Reviewed-by: Bhadram Varka <vbhadram@nvidia.com>
Reviewed-by: Bharat Nihalani <bnihalani@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
This commit is contained in:
Srinivas Ramachandran
2019-07-24 17:46:43 -07:00
committed by Revanth Kumar Uppala
parent 610e2b6a21
commit 7fb9f30e28
3 changed files with 311 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

87
drivers/net/ethernet/nvidia/nvethernet/ether_linux.c
View File

@@ -198,6 +198,61 @@ err_axi_cbb:
return ret;
}
/**
* @brief ether_conf_eee - Init and configure EEE LPI in the MAC
*
* Algorithm:
* 1) Check if EEE is requested to be enabled/disabled.
* 2) If enabled, then check if current PHY speed/mode supports EEE.
* 3) If PHY supports, then enable the Tx LPI timers in MAC and set EEE active.
* 4) Else disable the Tx LPI timers in MAC and set EEE inactive.
*
* @param[in] pdata: Pointer to driver private data structure
* @param[in] tx_lpi_enable: Flag to indicate Tx LPI enable (1) or disable (0)
*
* @note MAC and PHY need to be initialized.
*
* @retval OSI_ENABLE if EEE is enabled/active
* @retval OSI_DISABLE if EEE is disabled/inactive
*/
int ether_conf_eee(struct ether_priv_data *pdata, unsigned int tx_lpi_enable)
{
int ret = 0;
struct phy_device *phydev = pdata->phydev;
unsigned int enable = tx_lpi_enable;
if (tx_lpi_enable) {
/* phy_init_eee() returns 0 if EEE is supported by the PHY */
if (phy_init_eee(phydev, OSI_ENABLE)) {
/* PHY does not support EEE, disable it in MAC */
enable = OSI_DISABLE;
} else {
/* PHY supports EEE, if link is up enable EEE */
enable = (unsigned int)phydev->link;
}
}
/* Enable EEE */
ret = osi_configure_eee(pdata->osi_core,
enable,
pdata->tx_lpi_timer);
/* Return current status of EEE based on OSI API success/failure */
if (ret != 0) {
if (enable) {
dev_warn(pdata->dev, "Failed to enable EEE\n");
ret = OSI_DISABLE;
} else {
dev_warn(pdata->dev, "Failed to disable EEE\n");
ret = OSI_ENABLE;
}
} else {
/* EEE enabled/disabled successfully as per enable flag */
ret = enable;
}
return ret;
}
/**
* @brief Adjust link call back
*
@@ -215,6 +270,7 @@ static void ether_adjust_link(struct net_device *dev)
struct phy_device *phydev = pdata->phydev;
int new_state = 0, speed_changed = 0;
unsigned long val;
unsigned int eee_enable = OSI_DISABLE;
if (phydev == NULL) {
return;
@@ -273,6 +329,13 @@ static void ether_adjust_link(struct net_device *dev)
"failed to do pad caliberation\n");
}
}
/* Configure EEE if it is enabled */
if (pdata->eee_enabled && pdata->tx_lpi_enabled) {
eee_enable = OSI_ENABLE;
}
pdata->eee_active = ether_conf_eee(pdata, eee_enable);
}
/**
@@ -1157,6 +1220,27 @@ static int ether_therm_init(struct ether_priv_data *pdata)
}
#endif /* THERMAL_CAL */
/**
* @brief Initialize default EEE LPI configurations
*
* Algorithm: Update the defalt configuration/timers for EEE LPI in driver
* private data structure
*
* @param[in] pdata: OSD private data.
*/
static inline void ether_init_eee_params(struct ether_priv_data *pdata)
{
if (pdata->hw_feat.eee_sel) {
pdata->eee_enabled = OSI_ENABLE;
} else {
pdata->eee_enabled = OSI_DISABLE;
}
pdata->tx_lpi_enabled = pdata->eee_enabled;
pdata->eee_active = OSI_DISABLE;
pdata->tx_lpi_timer = OSI_DEFAULT_TX_LPI_TIMER;
}
/**
* @brief Call back to handle bring up of Ethernet interface
*
@@ -1280,6 +1364,9 @@ static int ether_open(struct net_device *dev)
goto err_r_irq;
}
/* Init EEE configuration */
ether_init_eee_params(pdata);
/* Start the MAC */
osi_start_mac(pdata->osi_core);