Messages in this thread | | | From | "Radu Pirea (NXP OSS)" <> | Subject | [RFC net-next v2 0/5] Add MACsec support for TJA11XX C45 PHYs | Date | Thu, 24 Aug 2023 12:16:10 +0300 |
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This is the MACsec support for TJA11XX PHYs. The MACsec block encrypts the ethernet frames on the fly and has no buffering. This operation will grow the frames by 32 bytes. If the frames are sent back to back, the MACsec block will not have enough room to insert the SecTAG and the ICV and the frames will be dropped.
To mitigate this, the PHY can parse a specific ethertype with some padding bytes and replace them with the SecTAG and ICV. These padding bytes might be dummy or might contain information about TX SC that must be used to encrypt the frame.
On the RX path, the PHY can insert a similar tag that contains information about the RX SC which received the frame. However, the RX tag is not enabled in this patch series, but I consider this important for the review.
Radu P.
Changes in v2: - added documentation - reordered and split patches - WARN_ON_ONCE if reg address is not properly aligned - removed unnecesary checks in insert_tx_tag - adjusted mdo_insert_tx_tag parameters. macsec_context replaced with phy_device and sk_buff - added extscs parameter to allow the user to choose the TX SC selection mechanism - improved patches description
Radu Pirea (NXP OSS) (5): net: macsec: documentation for macsec_context and macsec_ops net: macsec: introduce mdo_insert_tx_tag net: phy: nxp-c45-tja11xx add MACsec support net: phy: nxp-c45-tja11xx: add MACsec statistics net: phy: nxp-c45-tja11xx: implement mdo_insert_tx_tag
MAINTAINERS | 2 +- drivers/net/macsec.c | 96 +- drivers/net/phy/Kconfig | 2 +- drivers/net/phy/Makefile | 4 + drivers/net/phy/nxp-c45-tja11xx-macsec.c | 1877 ++++++++++++++++++++++ drivers/net/phy/nxp-c45-tja11xx.c | 72 +- drivers/net/phy/nxp-c45-tja11xx.h | 55 + include/net/macsec.h | 46 + 8 files changed, 2122 insertions(+), 32 deletions(-) create mode 100644 drivers/net/phy/nxp-c45-tja11xx-macsec.c create mode 100644 drivers/net/phy/nxp-c45-tja11xx.h
-- 2.34.1
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