If the DSA master fails to probe for whatever reason, then DSA devices
will continue on as if nothing is wrong. This can cause incorrect
behavior. In particular, on sandbox, dsa_sandbox_probe attempts to
access the master's private data. This is only safe to do if the master
has been probed first. Fix this by probing the master after we look it
up, and bailing out if we get an error.
Fixes: fc054d563b ("net: Introduce DSA class for Ethernet switches")
Signed-off-by: Sean Anderson <sean.anderson@seco.com>
Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com>
If the DSA API is going to allow drivers to do things such as:
- phy_config in dsa_ops :: port_probe
- phy_startup in dsa_ops :: port_enable
then it would actually be good if the ->port_probe() method would
actually be called in all cases before the ->port_enable() is.
Currently this is true for user ports, but not true for the CPU port,
because the CPU port does not have a udevice registered for it (this is
all part of DSA's design). So the current issue is that after
phy_startup has finished for the CPU port, its phydev->speed is an
uninitialized value, because phy_config() was never called for the
priv->cpu_port_fixed_phy, and it is precisely phy_config() who copies
the speed into the phydev in the case of the fixed PHY driver.
So we need to simulate a probing event for the CPU port by manually
calling the driver's ->port_probe() method for the CPU port.
Fixes: 8a2982574854 ("net: dsa: introduce a .port_probe() method in struct dsa_ops")
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Ramon Fried <rfried.dev@gmail.com>
set_promisc() call accepts the parameter of a bool type. Make it
clear by using true instead of 1.
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Ramon Fried <rfried.dev@gmail.com>
In the current DSA switch driver API, only the udevice of the switch
(belonging to UCLASS_DSA) is exposed, as well as an "int port" argument.
So drivers do not have access to the udevice of individual ports
(belonging to UCLASS_ETH), one of the reasons being that not all ports
have an associated UCLASS_ETH udevice.
However, all DSA ports have an OF node, and in some cases the driver
needs a handle to it, for all ports including the CPU port. Example: the
following Linux per-port device tree property:
managed = "in-band-status";
states whether a port should operate with clause 37 in-band autoneg
enabled or not.
This patch exposes a function which can be called by individual drivers
as needed.
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Ramon Fried <rfried.dev@gmail.com>
strncpy() simply bails out when copying a source string whose size
exceeds the destination string size, potentially leaving the destination
string unterminated.
One possible way to address is to pass DSA_PORT_NAME_LENGTH - 1 and a
previously zero-initialized destination string, but this is more
difficult to maintain.
The chosen alternative is to use strlcpy(), which properly limits the
copy len in the (srclen >= size) case to "size - 1", and which is also
more efficient than the strncpy() byte-by-byte implementation by using
memcpy. The destination string returned by strlcpy() is always NULL
terminated.
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Ramon Fried <rfried.dev@gmail.com>
"dev" and "dsa_pdata" are unused inside dsa_port_of_to_pdata.
"dsa_priv" is unused inside dsa_port_probe.
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Ramon Fried <rfried.dev@gmail.com>
While adding the logic for DSA to register a fixed-link PHY for the CPU
port, I forgot to pass it to the .port_disable method too, just
.port_enable.
Bug had no impact for felix_switch.c, due to the phy argument not being
used, but ksz9477.c does use it => NULL pointer dereference.
Fixes: fc054d563b ("net: Introduce DSA class for Ethernet switches")
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Ramon Fried <rfried.dev@gmail.com>
Some drivers might want to execute code for each port at probe time, as
opposed to executing code just-in-time for the port selected for
networking.
To cater to that use case, introduce a .port_probe() callback method
into the DSA switch operations which is called for each available port,
at the end of dsa_port_probe().
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Ramon Fried <rfried.dev@gmail.com>
Tested-by: Michael Walle <michael@walle.cc>
This snippet of code has a bothering "if (...) return 0" in it which
assumes it is the last piece of code running in dsa_port_probe().
This makes it difficult to add further code at the end of dsa_port_probe()
which does not depend on MAC address stuff.
So move the code to a dedicated function which returns void and let the
code flow through.
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Ramon Fried <rfried.dev@gmail.com>
Tested-by: Michael Walle <michael@walle.cc>
DM DSA uses "err" for error code values, so use this consistently.
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Ramon Fried <rfried.dev@gmail.com>
Tested-by: Michael Walle <michael@walle.cc>
If ports have their own unique MAC addrs and master has a set_promisc
function, call it so that packets will be received for ports.
Signed-off-by: Tim Harvey <tharvey@gateworks.com>
Reviewed-by: Ramon Fried <rfried.dev@gmail.com>
Because we probe the master ourselves (and fail if there is no master),
it is not possible that we don't have a master device.
There is one catch though: device removal. We don't support that. It
wasn't supported neither before this patch. Because the master device
was only set in .pre_probe(), if a device was removed master_dev was a
dangling pointer and transmitting a frame cause a panic. I don't see a
good solution without having some sort of notify machanism when a
udevice is removed.
Signed-off-by: Michael Walle <michael@walle.cc>
Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Tested-by: Michael Walle <michael@walle.cc> [DSA unit tests]
Reviewed-by: Priyanka Jain <priyanka.jain@nxp.com>
Because the uclass has the "*_auto" properties set, the driver model
will take care of allocating the private structures for us and they
can't be NULL. Drop the checks.
Signed-off-by: Michael Walle <michael@walle.cc>
Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Ramon Fried <rfried.dev@gmail.com>
Reviewed-by: Priyanka Jain <priyanka.jain@nxp.com>
DSA needs to have the master device probed first for MAC inheritance.
Until now, it only works by chance because the only user (LS1028A SoC)
will probe the master device first. The probe order is given by the PCI
device ordering, thus it works because the master device has a "smaller"
BDF then the switch device.
Explicitly probe the master device in dsa_port_probe().
Fixes: fc054d563b ("net: Introduce DSA class for Ethernet switches")
Signed-off-by: Michael Walle <michael@walle.cc>
Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Ramon Fried <rfried.dev@gmail.com>
Reviewed-by: Priyanka Jain <priyanka.jain@nxp.com>
It doesn't make sense to have DSA without a master port. Error out early
if there is no master port.
Fixes: fc054d563b ("net: Introduce DSA class for Ethernet switches")
Signed-off-by: Michael Walle <michael@walle.cc>
Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Ramon Fried <rfried.dev@gmail.com>
Reviewed-by: Priyanka Jain <priyanka.jain@nxp.com>
DSA stands for Distributed Switch Architecture and it covers switches that
are connected to the CPU through an Ethernet link and generally use frame
tags to pass information about the source/destination ports to/from CPU.
Front panel ports are presented as regular ethernet devices in U-Boot and
they are expected to support the typical networking commands.
DSA switches may be cascaded, DSA class code does not currently support
this.
Signed-off-by: Alex Marginean <alexandru.marginean@nxp.com>
Signed-off-by: Claudiu Manoil <claudiu.manoil@nxp.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
