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nvethernet: Add IOCTL handler to config loopback mode

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MODS tests use private IOCTL to configure MAC loopback mode.
Add a priv ioctl handler to support this in nvethernet driver.
nvethernet driver also has a sysfs knob to configure loopback.

Bug 2665785

Change-Id: I7f488fe81a0772a0881dbba48592bbcd11205dbf
Signed-off-by: Srinivas Ramachandran <srinivasra@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/2166181
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
This commit is contained in:
Srinivas Ramachandran
2019-08-01 11:42:57 -07:00
committed by Revanth Kumar Uppala
parent da8bbea503
commit c3ed68143b
2 changed files with 60 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

59
drivers/net/ethernet/nvidia/nvethernet/ioctl.c
View File

@@ -564,6 +564,62 @@ static int ether_config_l2_da_filter(struct net_device *dev,
return ret;
}
/**
* ether_config_loopback_mode- This function is invoked by ioctl
* when user issues an ioctl command to enable/disable MAC loopback mode.
*
* @dev: pointer to net device structure.
* @flags: flag to indicate whether MAC loopback mode to be enabled or
* disabled.
*
* Algorithm:
* 1) check if loopback mode enalbed/disable already and return success.
* 2) OSI call to configure loopback mode in HW.
*
* Dependencies: MAC and PHY need to be initialized.
*
* Protection: None.
*
* Return 0- sucessful, Negative - error
*/
static int ether_config_loopback_mode(struct net_device *ndev,
unsigned int flags)
{
struct ether_priv_data *pdata = netdev_priv(ndev);
struct osi_core_priv_data *osi_core = pdata->osi_core;
int ret = 0;
if ((flags && (pdata->mac_loopback_mode == OSI_ENABLE)) ||
(!flags && (pdata->mac_loopback_mode == OSI_DISABLE))) {
dev_info(pdata->dev, "Loopback mode is already configured\n");
return ret;
}
if (flags) {
netif_carrier_on(ndev);
ret = osi_config_mac_loopback(osi_core, OSI_ENABLE);
if (ret < 0) {
dev_err(pdata->dev,
"Failed to enable MAC Loopback\n");
} else {
pdata->mac_loopback_mode = OSI_ENABLE;
dev_info(pdata->dev, "MAC loopback enabled\n");
}
} else {
netif_carrier_off(ndev);
ret = osi_config_mac_loopback(osi_core, OSI_DISABLE);
if (ret < 0) {
dev_err(pdata->dev,
"Failed to disable MAC Loopback\n");
} else {
pdata->mac_loopback_mode = OSI_DISABLE;
dev_info(pdata->dev, "MAC loopback disabled\n");
}
}
return ret;
}
/**
* ether_priv_ioctl - Handle private IOCTLs
* @ndev: network device structure
@@ -641,6 +697,9 @@ int ether_handle_priv_ioctl(struct net_device *ndev,
case EQOS_L2_DA_FILTERING_CMD:
ret = ether_config_l2_da_filter(ndev, &ifdata);
break;
case ETHER_CONFIG_LOOPBACK_MODE:
ret = ether_config_loopback_mode(ndev, ifdata.if_flags);
break;
default:
break;
}

1
drivers/net/ethernet/nvidia/nvethernet/ioctl.h
View File

@@ -37,6 +37,7 @@
/* L2 DA filtering */
#define EQOS_L2_DA_FILTERING_CMD 35
#define ETHER_CONFIG_ARP_OFFLOAD 36
#define ETHER_CONFIG_LOOPBACK_MODE 40
#define ETHER_GET_AVB_ALGORITHM 46
/**