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net: phy: nxp-c45-tja11xx: implement mdo_insert_tx_tag

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Implement mdo_insert_tx_tag to insert the TLV header in the ethernet
frame.

Signed-off-by: Radu Pirea (NXP OSS) <radu-nicolae.pirea@oss.nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Radu Pirea (NXP OSS) 2023-12-19 16:53:33 +02:00 • committed by David S. Miller
parent 31a99fc06b
commit dc1a00380a
1 changed files with 41 additions and 0 deletions
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41
drivers/net/phy/nxp-c45-tja11xx-macsec.c
View file

@ -11,6 +11,7 @@
#include <linux/module.h>
#include <linux/phy.h>
#include <linux/processor.h>
#include <net/dst_metadata.h>
#include <net/macsec.h>
#include "nxp-c45-tja11xx.h"
@ -118,6 +119,8 @@
#define ADPTR_CNTRL 0x0F00
#define ADPTR_CNTRL_CONFIG_EN BIT(14)
#define ADPTR_CNTRL_ADPTR_EN BIT(12)
#define ADPTR_TX_TAG_CNTRL 0x0F0C
#define ADPTR_TX_TAG_CNTRL_ENA BIT(31)
#define TX_SC_FLT_BASE 0x800
#define TX_SC_FLT_SIZE 0x10
@ -166,6 +169,11 @@
#define MACSEC_INPBTS 0x0638
#define MACSEC_IPSNFS 0x063C
#define TJA11XX_TLV_TX_NEEDED_HEADROOM (32)
#define TJA11XX_TLV_NEEDED_TAILROOM (0)
#define ETH_P_TJA11XX_TLV (0x4e58)
enum nxp_c45_sa_type {
TX_SA,
RX_SA,
@ -1543,6 +1551,31 @@ static int nxp_c45_mdo_get_rx_sa_stats(struct macsec_context *ctx)
return 0;
}
struct tja11xx_tlv_header {
struct ethhdr eth;
u8 subtype;
u8 len;
u8 payload[28];
};
static int nxp_c45_mdo_insert_tx_tag(struct phy_device *phydev,
struct sk_buff *skb)
{
struct tja11xx_tlv_header *tlv;
struct ethhdr *eth;
eth = eth_hdr(skb);
tlv = skb_push(skb, TJA11XX_TLV_TX_NEEDED_HEADROOM);
memmove(tlv, eth, sizeof(*eth));
skb_reset_mac_header(skb);
tlv->eth.h_proto = htons(ETH_P_TJA11XX_TLV);
tlv->subtype = 1;
tlv->len = sizeof(tlv->payload);
memset(tlv->payload, 0, sizeof(tlv->payload));
return 0;
}
static const struct macsec_ops nxp_c45_macsec_ops = {
.mdo_dev_open = nxp_c45_mdo_dev_open,
.mdo_dev_stop = nxp_c45_mdo_dev_stop,
@ -1563,6 +1596,9 @@ static const struct macsec_ops nxp_c45_macsec_ops = {
.mdo_get_tx_sa_stats = nxp_c45_mdo_get_tx_sa_stats,
.mdo_get_rx_sc_stats = nxp_c45_mdo_get_rx_sc_stats,
.mdo_get_rx_sa_stats = nxp_c45_mdo_get_rx_sa_stats,
.mdo_insert_tx_tag = nxp_c45_mdo_insert_tx_tag,
.needed_headroom = TJA11XX_TLV_TX_NEEDED_HEADROOM,
.needed_tailroom = TJA11XX_TLV_NEEDED_TAILROOM,
};
int nxp_c45_macsec_config_init(struct phy_device *phydev)
@ -1583,6 +1619,11 @@ int nxp_c45_macsec_config_init(struct phy_device *phydev)
if (ret)
return ret;
ret = nxp_c45_macsec_write(phydev, ADPTR_TX_TAG_CNTRL,
ADPTR_TX_TAG_CNTRL_ENA);
if (ret)
return ret;
ret = nxp_c45_macsec_write(phydev, ADPTR_CNTRL, ADPTR_CNTRL_ADPTR_EN);
if (ret)
return ret;