linux-toradex.git/include/soc/mscc, branch v5.17-rc4

net: dsa: felix: add port fast age support

2022-01-08T02:58:25+00:00

Add support for flushing the MAC table on a given port in the ocelot
switch library, and use this functionality in the felix DSA driver.

This operation is needed when a port leaves a bridge to become
standalone, and when the learning is disabled, and when the STP state
changes to a state where no FDB entry should be present.

Signed-off-by: Vladimir Oltean 
Reviewed-by: Florian Fainelli 
Link: https://lore.kernel.org/r/20220107144229.244584-1-vladimir.oltean@nxp.com
Signed-off-by: Jakub Kicinski

net: ocelot: add FDMA support

2021-12-11T04:56:58+00:00

Ethernet frames can be extracted or injected autonomously to or from
the device’s DDR3/DDR3L memory and/or PCIe memory space. Linked list
data structures in memory are used for injecting or extracting Ethernet
frames. The FDMA generates interrupts when frame extraction or
injection is done and when the linked lists need updating.

The FDMA is shared between all the ethernet ports of the switch and
uses a linked list of descriptors (DCB) to inject and extract packets.
Before adding descriptors, the FDMA channels must be stopped. It would
be inefficient to do that each time a descriptor would be added so the
channels are restarted only once they stopped.

Both channels uses ring-like structure to feed the DCBs to the FDMA.
head and tail are never touched by hardware and are completely handled
by the driver. On top of that, page recycling has been added and is
mostly taken from gianfar driver.

Reviewed-by: Vladimir Oltean 
Co-developed-by: Alexandre Belloni 
Signed-off-by: Alexandre Belloni 
Signed-off-by: Clément Léger 
Signed-off-by: Jakub Kicinski

net: ocelot: add and export ocelot_ptp_rx_timestamp()

2021-12-11T04:56:57+00:00

In order to support PTP in FDMA, PTP handling code is needed. Since
this is the same as for register-based extraction, export it with
a new ocelot_ptp_rx_timestamp() function.

Reviewed-by: Vladimir Oltean 
Signed-off-by: Clément Léger 
Signed-off-by: Jakub Kicinski

net: ocelot: export ocelot_ifh_port_set() to setup IFH

2021-12-11T04:56:57+00:00

FDMA will need this code to prepare the injection frame header when
sending SKBs. Move this code into ocelot_ifh_port_set() and add
conditional IFH setting for vlan and rew op if they are not set.

Reviewed-by: Vladimir Oltean 
Signed-off-by: Clément Léger 
Signed-off-by: Jakub Kicinski

net: ocelot: fix missed include in the vsc7514_regs.h file

2021-12-11T03:52:10+00:00

commit 32ecd22ba60b ("net: mscc: ocelot: split register definitions to a
separate file") left out an include for . It was
missed because the only consumer was ocelot_vsc7514.h, which already
included ocelot_vcap.

Fixes: 32ecd22ba60b ("net: mscc: ocelot: split register definitions to a separate file")
Signed-off-by: Colin Foster 
Reviewed-by: Florian Fainelli 
Link: https://lore.kernel.org/r/20211209074010.1813010-1-colin.foster@in-advantage.com
Signed-off-by: Jakub Kicinski

net: mscc: ocelot: split register definitions to a separate file

2021-12-08T05:44:49+00:00

Move these to a separate file will allow them to be shared to other
drivers.

Signed-off-by: Colin Foster 
Reviewed-by: Vladimir Oltean 
Reviewed-by: Florian Fainelli 
Signed-off-by: Jakub Kicinski

Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net

2021-11-26T21:45:19+00:00

drivers/net/ipa/ipa_main.c
  8afc7e471ad3 ("net: ipa: separate disabling setup from modem stop")
  76b5fbcd6b47 ("net: ipa: kill ipa_modem_init()")

Duplicated include, drop one.

Signed-off-by: Jakub Kicinski

net: mscc: ocelot: create a function that replaces an existing VCAP filter

2021-11-26T19:38:20+00:00

VCAP (Versatile Content Aware Processor) is the TCAM-based engine behind
tc flower offload on ocelot, among other things. The ingress port mask
on which VCAP rules match is present as a bit field in the actual key of
the rule. This means that it is possible for a rule to be shared among
multiple source ports. When the rule is added one by one on each desired
port, that the ingress port mask of the key must be edited and rewritten
to hardware.

But the API in ocelot_vcap.c does not allow for this. For one thing,
ocelot_vcap_filter_add() and ocelot_vcap_filter_del() are not symmetric,
because ocelot_vcap_filter_add() works with a preallocated and
prepopulated filter and programs it to hardware, and
ocelot_vcap_filter_del() does both the job of removing the specified
filter from hardware, as well as kfreeing it. That is to say, the only
option of editing a filter in place, which is to delete it, modify the
structure and add it back, does not work because it results in
use-after-free.

This patch introduces ocelot_vcap_filter_replace, which trivially
reprograms a VCAP entry to hardware, at the exact same index at which it
existed before, without modifying any list or allocating any memory.

Signed-off-by: Vladimir Oltean 
Acked-by: Richard Cochran 
Signed-off-by: Jakub Kicinski

net: dsa: felix: enable cut-through forwarding between ports by default

2021-11-26T03:32:07+00:00

The VSC9959 switch embedded within NXP LS1028A (and that version of
Ocelot switches only) supports cut-through forwarding - meaning it can
start the process of looking up the destination ports for a packet, and
forward towards those ports, before the entire packet has been received
(as opposed to the store-and-forward mode).

The up side is having lower forwarding latency for large packets. The
down side is that frames with FCS errors are forwarded instead of being
dropped. However, erroneous frames do not result in incorrect updates of
the FDB or incorrect policer updates, since these processes are deferred
inside the switch to the end of frame. Since the switch starts the
cut-through forwarding process after all packet headers (including IP,
if any) have been processed, packets with large headers and small
payload do not see the benefit of lower forwarding latency.

There are two cases that need special attention.

The first is when a packet is multicast (or flooded) to multiple
destinations, one of which doesn't have cut-through forwarding enabled.
The switch deals with this automatically by disabling cut-through
forwarding for the frame towards all destination ports.

The second is when a packet is forwarded from a port of lower link speed
towards a port of higher link speed. This is not handled by the hardware
and needs software intervention.

Since we practically need to update the cut-through forwarding domain
from paths that aren't serialized by the rtnl_mutex (phylink
mac_link_down/mac_link_up ops), this means we need to serialize physical
link events with user space updates of bonding/bridging domains.

Enabling cut-through forwarding is done per {egress port, traffic class}.
I don't see any reason why this would be a configurable option as long
as it works without issues, and there doesn't appear to be any user
space configuration tool to toggle this on/off, so this patch enables
cut-through forwarding on all eligible ports and traffic classes.

Signed-off-by: Vladimir Oltean 
Link: https://lore.kernel.org/r/20211125125808.2383984-2-vladimir.oltean@nxp.com
Signed-off-by: Jakub Kicinski

net: dsa: felix: restrict psfp rules on ingress port

2021-11-18T12:07:24+00:00

PSFP rules take effect on the streams from any port of VSC9959 switch.
This patch use ingress port to limit the rule only active on this port.

Each stream can only match two ingress source ports in VSC9959. Streams
from lowest port gets the configuration of SFID pointed by MAC Table
lookup and streams from highest port gets the configuration of (SFID+1)
pointed by MAC Table lookup. This patch defines the PSFP rule on highest
port as dummy rule, which means that it does not modify the MAC table.

Signed-off-by: Xiaoliang Yang 
Signed-off-by: David S. Miller