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Subject[PATCH net-next v3 15/15] net: macsec: add support for offloading to the MAC
Date
This patch adds a new MACsec offloading option, MACSEC_OFFLOAD_MAC,
allowing a user to select a MAC as a provider for MACsec offloading
operations.

Signed-off-by: Antoine Tenart <antoine.tenart@bootlin.com>
---
drivers/net/macsec.c | 16 +++++++++++++---
include/uapi/linux/if_link.h | 1 +
tools/include/uapi/linux/if_link.h | 1 +
3 files changed, 15 insertions(+), 3 deletions(-)

diff --git a/drivers/net/macsec.c b/drivers/net/macsec.c
index 8247eb652f57..222b6ed93b27 100644
--- a/drivers/net/macsec.c
+++ b/drivers/net/macsec.c
@@ -324,7 +324,8 @@ static void macsec_set_shortlen(struct macsec_eth_header *h, size_t data_len)
/* Checks if a MACsec interface is being offloaded to an hardware engine */
static bool macsec_is_offloaded(struct macsec_dev *macsec)
{
- if (macsec->offload == MACSEC_OFFLOAD_PHY)
+ if (macsec->offload == MACSEC_OFFLOAD_MAC ||
+ macsec->offload == MACSEC_OFFLOAD_PHY)
return true;

return false;
@@ -340,6 +341,9 @@ static bool macsec_check_offload(enum macsec_offload offload,
if (offload == MACSEC_OFFLOAD_PHY)
return macsec->real_dev->phydev &&
macsec->real_dev->phydev->macsec_ops;
+ else if (offload == MACSEC_OFFLOAD_MAC)
+ return macsec->real_dev->features & NETIF_F_HW_MACSEC &&
+ macsec->real_dev->macsec_ops;

return false;
}
@@ -354,9 +358,14 @@ static const struct macsec_ops *__macsec_get_ops(enum macsec_offload offload,

if (offload == MACSEC_OFFLOAD_PHY)
ctx->phydev = macsec->real_dev->phydev;
+ else if (offload == MACSEC_OFFLOAD_MAC)
+ ctx->netdev = macsec->real_dev;
}

- return macsec->real_dev->phydev->macsec_ops;
+ if (offload == MACSEC_OFFLOAD_PHY)
+ return macsec->real_dev->phydev->macsec_ops;
+ else
+ return macsec->real_dev->macsec_ops;
}

/* Returns a pointer to the MACsec ops struct if any and updates the MACsec
@@ -2414,7 +2423,8 @@ static int macsec_upd_offload(struct sk_buff *skb, struct genl_info *info)

priv = macsec_priv(loop_dev);

- if (!macsec_check_offload(MACSEC_OFFLOAD_PHY, priv))
+ if (!macsec_check_offload(MACSEC_OFFLOAD_PHY, priv) &&
+ !macsec_check_offload(MACSEC_OFFLOAD_MAC, priv))
continue;

if (priv->offload != MACSEC_OFFLOAD_OFF)
diff --git a/include/uapi/linux/if_link.h b/include/uapi/linux/if_link.h
index 024af2d1d0af..771371d5b996 100644
--- a/include/uapi/linux/if_link.h
+++ b/include/uapi/linux/if_link.h
@@ -489,6 +489,7 @@ enum macsec_validation_type {
enum macsec_offload {
MACSEC_OFFLOAD_OFF = 0,
MACSEC_OFFLOAD_PHY = 1,
+ MACSEC_OFFLOAD_MAC = 2,
__MACSEC_OFFLOAD_END,
MACSEC_OFFLOAD_MAX = __MACSEC_OFFLOAD_END - 1,
};
diff --git a/tools/include/uapi/linux/if_link.h b/tools/include/uapi/linux/if_link.h
index 42efdb84d189..7bf406d3ce62 100644
--- a/tools/include/uapi/linux/if_link.h
+++ b/tools/include/uapi/linux/if_link.h
@@ -488,6 +488,7 @@ enum macsec_validation_type {
enum macsec_offload {
MACSEC_OFFLOAD_OFF = 0,
MACSEC_OFFLOAD_PHY = 1,
+ MACSEC_OFFLOAD_MAC = 2,
__MACSEC_OFFLOAD_END,
MACSEC_OFFLOAD_MAX = __MACSEC_OFFLOAD_END - 1,
};
--
2.23.0
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