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f5aef42415
It's nice to be able to test a tagging protocol with dsa_loop, but not
at the cost of losing the ability of building the tagging protocol and
switch driver as modules, because as things stand, there is a circular
dependency between the two. Tagging protocol drivers cannot depend on
switch drivers, that is a hard fact.
The reasoning behind the blamed patch was that accessing dp->priv should
first make sure that the structure behind that pointer is what we really
think it is.
Currently the "sja1105" and "sja1110" tagging protocols only operate
with the sja1105 switch driver, just like any other tagging protocol and
switch combination. The only way to mix and match them is by modifying
the code, and this applies to dsa_loop as well (by default that uses
DSA_TAG_PROTO_NONE). So while in principle there is an issue, in
practice there isn't one.
Until we extend dsa_loop to allow user space configuration, treat the
problem as a non-issue and just say that DSA ports found by tag_sja1105
are always sja1105 ports, which is in fact true. But keep the
dsa_port_is_sja1105 function so that it's easy to patch it during
testing, and rely on dead code elimination.
Fixes: 994d2cbb08 ("net: dsa: tag_sja1105: be dsa_loop-safe")
Link: https://lore.kernel.org/netdev/20210908220834.d7gmtnwrorhharna@skbuf/
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
161 lines
5.4 KiB
Plaintext
161 lines
5.4 KiB
Plaintext
# SPDX-License-Identifier: GPL-2.0-only
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menuconfig NET_DSA
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tristate "Distributed Switch Architecture"
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depends on BRIDGE || BRIDGE=n
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depends on HSR || HSR=n
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depends on INET && NETDEVICES
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select GRO_CELLS
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select NET_SWITCHDEV
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select PHYLINK
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select NET_DEVLINK
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imply NET_SELFTESTS
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help
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Say Y if you want to enable support for the hardware switches supported
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by the Distributed Switch Architecture.
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if NET_DSA
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# Drivers must select the appropriate tagging format(s)
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config NET_DSA_TAG_AR9331
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tristate "Tag driver for Atheros AR9331 SoC with built-in switch"
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help
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Say Y or M if you want to enable support for tagging frames for
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the Atheros AR9331 SoC with built-in switch.
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config NET_DSA_TAG_BRCM_COMMON
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tristate
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default n
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config NET_DSA_TAG_BRCM
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tristate "Tag driver for Broadcom switches using in-frame headers"
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select NET_DSA_TAG_BRCM_COMMON
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help
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Say Y if you want to enable support for tagging frames for the
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Broadcom switches which place the tag after the MAC source address.
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config NET_DSA_TAG_BRCM_LEGACY
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tristate "Tag driver for Broadcom legacy switches using in-frame headers"
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select NET_DSA_TAG_BRCM_COMMON
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help
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Say Y if you want to enable support for tagging frames for the
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Broadcom legacy switches which place the tag after the MAC source
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address.
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config NET_DSA_TAG_BRCM_PREPEND
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tristate "Tag driver for Broadcom switches using prepended headers"
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select NET_DSA_TAG_BRCM_COMMON
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help
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Say Y if you want to enable support for tagging frames for the
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Broadcom switches which places the tag before the Ethernet header
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(prepended).
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config NET_DSA_TAG_HELLCREEK
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tristate "Tag driver for Hirschmann Hellcreek TSN switches"
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help
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Say Y or M if you want to enable support for tagging frames
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for the Hirschmann Hellcreek TSN switches.
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config NET_DSA_TAG_GSWIP
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tristate "Tag driver for Lantiq / Intel GSWIP switches"
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help
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Say Y or M if you want to enable support for tagging frames for the
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Lantiq / Intel GSWIP switches.
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config NET_DSA_TAG_DSA_COMMON
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tristate
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config NET_DSA_TAG_DSA
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tristate "Tag driver for Marvell switches using DSA headers"
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select NET_DSA_TAG_DSA_COMMON
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help
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Say Y or M if you want to enable support for tagging frames for the
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Marvell switches which use DSA headers.
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config NET_DSA_TAG_EDSA
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tristate "Tag driver for Marvell switches using EtherType DSA headers"
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select NET_DSA_TAG_DSA_COMMON
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help
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Say Y or M if you want to enable support for tagging frames for the
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Marvell switches which use EtherType DSA headers.
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config NET_DSA_TAG_MTK
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tristate "Tag driver for Mediatek switches"
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help
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Say Y or M if you want to enable support for tagging frames for
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Mediatek switches.
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config NET_DSA_TAG_KSZ
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tristate "Tag driver for Microchip 8795/9477/9893 families of switches"
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help
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Say Y if you want to enable support for tagging frames for the
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Microchip 8795/9477/9893 families of switches.
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config NET_DSA_TAG_RTL4_A
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tristate "Tag driver for Realtek 4 byte protocol A tags"
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help
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Say Y or M if you want to enable support for tagging frames for the
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Realtek switches with 4 byte protocol A tags, sich as found in
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the Realtek RTL8366RB.
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config NET_DSA_TAG_OCELOT
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tristate "Tag driver for Ocelot family of switches, using NPI port"
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depends on MSCC_OCELOT_SWITCH_LIB || \
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(MSCC_OCELOT_SWITCH_LIB=n && COMPILE_TEST)
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select PACKING
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help
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Say Y or M if you want to enable NPI tagging for the Ocelot switches
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(VSC7511, VSC7512, VSC7513, VSC7514, VSC9953, VSC9959). In this mode,
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the frames over the Ethernet CPU port are prepended with a
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hardware-defined injection/extraction frame header. Flow control
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(PAUSE frames) over the CPU port is not supported when operating in
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this mode.
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config NET_DSA_TAG_OCELOT_8021Q
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tristate "Tag driver for Ocelot family of switches, using VLAN"
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depends on MSCC_OCELOT_SWITCH_LIB || \
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(MSCC_OCELOT_SWITCH_LIB=n && COMPILE_TEST)
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help
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Say Y or M if you want to enable support for tagging frames with a
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custom VLAN-based header. Frames that require timestamping, such as
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PTP, are not delivered over Ethernet but over register-based MMIO.
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Flow control over the CPU port is functional in this mode. When using
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this mode, less TCAM resources (VCAP IS1, IS2, ES0) are available for
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use with tc-flower.
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config NET_DSA_TAG_QCA
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tristate "Tag driver for Qualcomm Atheros QCA8K switches"
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help
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Say Y or M if you want to enable support for tagging frames for
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the Qualcomm Atheros QCA8K switches.
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config NET_DSA_TAG_LAN9303
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tristate "Tag driver for SMSC/Microchip LAN9303 family of switches"
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help
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Say Y or M if you want to enable support for tagging frames for the
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SMSC/Microchip LAN9303 family of switches.
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config NET_DSA_TAG_SJA1105
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tristate "Tag driver for NXP SJA1105 switches"
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select PACKING
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help
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Say Y or M if you want to enable support for tagging frames with the
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NXP SJA1105 switch family. Both the native tagging protocol (which
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is only for link-local traffic) as well as non-native tagging (based
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on a custom 802.1Q VLAN header) are available.
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config NET_DSA_TAG_TRAILER
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tristate "Tag driver for switches using a trailer tag"
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help
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Say Y or M if you want to enable support for tagging frames at
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with a trailed. e.g. Marvell 88E6060.
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config NET_DSA_TAG_XRS700X
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tristate "Tag driver for XRS700x switches"
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help
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Say Y or M if you want to enable support for tagging frames for
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Arrow SpeedChips XRS700x switches that use a single byte tag trailer.
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endif
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