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nvethernet: Add aes 128/256bit macsec config

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Adding aes 128/256 bit config support through sysfs node

Bug 3257779

Change-Id: I53b05842484d4ae0e9c51439415d35b171852574
Signed-off-by: Mahesh Patil <maheshp@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvidia/+/2484203
Reviewed-by: Srinivas Ramachandran <srinivasra@nvidia.com>
Reviewed-by: Bhadram Varka <vbhadram@nvidia.com>
GVS: Gerrit_Virtual_Submit
This commit is contained in:
Mahesh Patil
2021-02-12 12:10:14 -08:00
committed by Revanth Kumar Uppala
parent e061e50704
commit 90a4dce1fb
2 changed files with 84 additions and 0 deletions
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2
drivers/net/ethernet/nvidia/nvethernet/macsec.h
View File

@@ -147,6 +147,8 @@ struct macsec_priv_data {
char irq_name[2][MACSEC_IRQ_NAME_SZ];
/** loopback mode */
unsigned int loopback_mode;
/** macsec cipher, aes128 or aes256 bit */
unsigned int cipher;
/** MACsec protect frames variable */
unsigned int protect_frames;
/** MACsec enabled flags for Tx/Rx controller status */

82
drivers/net/ethernet/nvidia/nvethernet/sysfs.c
View File

@@ -217,6 +217,87 @@ static DEVICE_ATTR(macsec_enable, (S_IRUGO | S_IWUSR),
macsec_enable_show,
macsec_enable_store);
/**
* @brief Shows the current setting of MACsec cipther set
*
* Algorithm: Display the current MACsec cipher setting.
*
* @param[in] dev: Device data.
* @param[in] attr: Device attribute
* @param[in] buf: Buffer to store the current MACsec cipher setting
*/
static ssize_t macsec_cipher_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct net_device *ndev = (struct net_device *)dev_get_drvdata(dev);
struct ether_priv_data *pdata = netdev_priv(ndev);
struct macsec_priv_data *macsec_pdata = pdata->macsec_pdata;
return scnprintf(buf, PAGE_SIZE, "%s\n",
(macsec_pdata->cipher == MACSEC_CIPHER_AES128) ?
"aes128" : "aes256");
}
/**
* @brief Set the user setting of MACsec AES cipher
*
* Algorithm: This is used to set the user mode settings of MACsec cipther.
*
* @param[in] dev: Device data.
* @param[in] attr: Device attribute
* @param[in] buf: Buffer which contains the user settings of MACsec cipher
* @param[in] size: size of buffer
*
* @return size of buffer.
*/
static ssize_t macsec_cipher_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t size)
{
struct net_device *ndev = (struct net_device *)dev_get_drvdata(dev);
struct ether_priv_data *pdata = netdev_priv(ndev);
struct macsec_priv_data *macsec_pdata = pdata->macsec_pdata;
int ret = 0;
if (!netif_running(ndev)) {
dev_err(pdata->dev, "Not Allowed. Ether interface is not up\n");
return size;
}
if (strncmp(buf, "aes128", 6) == OSI_NONE) {
ret = osi_macsec_cipher_config(pdata->osi_core,
MACSEC_CIPHER_AES128);
if (ret < 0) {
dev_err(pdata->dev, "Failed to set macsec cipher\n");
} else {
macsec_pdata->cipher = MACSEC_CIPHER_AES128;
dev_info(pdata->dev, "macsec cipher aes128 enabled\n");
}
} else if (strncmp(buf, "aes256", 6) == OSI_NONE) {
ret = osi_macsec_cipher_config(pdata->osi_core,
MACSEC_CIPHER_AES256);
if (ret < 0) {
dev_err(pdata->dev, "Failed to set macsec cipher\n");
} else {
macsec_pdata->cipher = MACSEC_CIPHER_AES256;
dev_info(pdata->dev, "macsec cipher aes256 enabled\n");
}
} else {
dev_err(pdata->dev,
"Invalid entry. Valid Entries are aes128/aes256\n");
}
return size;
}
/**
* @brief Sysfs attribute for MACsec cipher
*
*/
static DEVICE_ATTR(macsec_cipher, (S_IRUGO | S_IWUSR),
macsec_cipher_show,
macsec_cipher_store);
/**
* @brief Shows the current setting of MACsec loopback
*
@@ -2075,6 +2156,7 @@ static struct attribute *ether_sysfs_attrs[] = {
&dev_attr_macsec_sc_state_lut.attr,
&dev_attr_macsec_sa_state_lut.attr,
&dev_attr_macsec_sc_param_lut.attr,
&dev_attr_macsec_cipher.attr,
&dev_attr_macsec_loopback.attr,
&dev_attr_macsec_enable.attr,
&dev_attr_macsec_mmc_counters.attr,