227d07a07e
In order to support this, we are creating a make-shift switch tag out of
a VLAN trunk configured on the CPU port. Termination of normal traffic
on switch ports only works when not under a vlan_filtering bridge.
Termination of management (PTP, BPDU) traffic works under all
circumstances because it uses a different tagging mechanism
(incl_srcpt). We are making use of the generic CONFIG_NET_DSA_TAG_8021Q
code and leveraging it from our own CONFIG_NET_DSA_TAG_SJA1105.
There are two types of traffic: regular and link-local.
The link-local traffic received on the CPU port is trapped from the
switch's regular forwarding decisions because it matched one of the two
DMAC filters for management traffic.
On transmission, the switch requires special massaging for these
link-local frames. Due to a weird implementation of the switching IP, by
default it drops link-local frames that originate on the CPU port.
It needs to be told where to forward them to, through an SPI command
("management route") that is valid for only a single frame.
So when we're sending link-local traffic, we are using the
dsa_defer_xmit mechanism.
Signed-off-by: Vladimir Oltean <olteanv@gmail.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
18 lines
707 B
Plaintext
18 lines
707 B
Plaintext
config NET_DSA_SJA1105
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tristate "NXP SJA1105 Ethernet switch family support"
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depends on NET_DSA && SPI
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select NET_DSA_TAG_SJA1105
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select PACKING
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select CRC32
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help
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This is the driver for the NXP SJA1105 automotive Ethernet switch
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family. These are 5-port devices and are managed over an SPI
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interface. Probing is handled based on OF bindings and so is the
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linkage to phylib. The driver supports the following revisions:
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- SJA1105E (Gen. 1, No TT-Ethernet)
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- SJA1105T (Gen. 1, TT-Ethernet)
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- SJA1105P (Gen. 2, No SGMII, No TT-Ethernet)
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- SJA1105Q (Gen. 2, No SGMII, TT-Ethernet)
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- SJA1105R (Gen. 2, SGMII, No TT-Ethernet)
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- SJA1105S (Gen. 2, SGMII, TT-Ethernet)
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