Stop assuming a fixed IPA core clock rate and interconnect
bandwidths.  Use the configuration data defined for these
things instead.  Get rid of the previously-used constants.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Populate the core clock rate and interconnect average and peak
bandwidth data for SDM845 and SC7180 in their configuration data
files.  At this point we still don't *use* this data.

Note that SC7180 actually defines a new core clock rate (100 MHz
instead of 75 MHz) and new interconnect bandwidth values.  They
will be activated in the next commit, which uses the configured
values rather than the fixed constants.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Define a new type of configuration data, used to initialize the
IPA core clock and interconnects.  This is the first of three
patches, and defines the data types and interface but doesn't
yet use them.

Switch the return value if there is no matching configuration data
to ENODEV instead of ENOTSUPP (to avoid using the nonstandard errno).
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

The mdio_bus may have dependencies from GPIO controller and so got
deferred. Now it will print error message every time -EPROBE_DEFER is
returned which from:
__mdiobus_register()
 |-devm_gpiod_get_optional()
without actually identifying error code.

"mdio_bus 4a101000.mdio: mii_bus 4a101000.mdio couldn't get reset GPIO"

Hence, suppress error message for devm_gpiod_get_optional() returning
-EPROBE_DEFER case by using dev_err_probe().
Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Link: https://lore.kernel.org/r/20201119203446.20857-1-grygorii.strashko@ti.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

Tiny improvement, let dev_err_probe() deal with EPROBE_DEFER.
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Link: https://lore.kernel.org/r/b0c4ebcf-2047-e933-b890-8a20e4bdb19f@gmail.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

Some chip versions have a hw bug resulting in lost door bell rings.
To work around this the doorbell is also rung whenever we still have
tx descriptors in flight after having cleaned up tx descriptors.
These PCI(e) writes come at a cost, therefore let's reduce the number
of extra doorbell rings.
If skb is NULL then this means:
- last cleaned-up descriptor belongs to a skb with at least one fragment
  and last fragment isn't marked as sent yet
- hw is in progress sending the skb, therefore no extra doorbell ring
  is needed for this skb
- once last fragment is marked as transmitted hw will trigger
  a tx done interrupt and we come here again (with skb != NULL)
  and ring the doorbell if needed
Therefore skip the workaround doorbell ring if skb is NULL.
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Link: https://lore.kernel.org/r/0a15a83c-aecf-ab51-8071-b29d9dcd529a@gmail.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

Mat Martineau says:

====================
mptcp: More miscellaneous MPTCP fixes

Here's another batch of fixup and enhancement patches that we have
collected in the MPTCP tree.

Patch 1 removes an unnecessary flag and related code.

Patch 2 fixes a bug encountered when closing fallback sockets.

Patches 3 and 4 choose a better transmit subflow, with a self test.

Patch 5 adjusts tracking of unaccepted subflows

Patches 6-8 improve handling of long ADD_ADDR options, with a test.

Patch 9 more reliably tracks the MPTCP-level window shared with peers.

Patch 10 sends MPTCP-level acknowledgements more aggressively, so the
peer can send more data without extra delay.
====================

Link: https://lore.kernel.org/r/20201119194603.103158-1-mathew.j.martineau@linux.intel.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

Send timely MPTCP-level ack is somewhat difficult when
the insertion into the msk receive level is performed
by the worker.

It needs TCP-level dup-ack to notify the MPTCP-level
ack_seq increase, as both the TCP-level ack seq and the
rcv window are unchanged.

We can actually avoid processing incoming data with the
worker, and let the subflow or recevmsg() send ack as needed.

When recvmsg() moves the skbs inside the msk receive queue,
the msk space is still unchanged, so tcp_cleanup_rbuf() could
end-up skipping TCP-level ack generation. Anyway, when
__mptcp_move_skbs() is invoked, a known amount of bytes is
going to be consumed soon: we update rcv wnd computation taking
them in account.

Additionally we need to explicitly trigger tcp_cleanup_rbuf()
when recvmsg() consumes a significant amount of the receive buffer.
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

OoO handling attempts to detect when packet is out-of-window by testing
current ack sequence and remaining space vs. sequence number.

This doesn't work reliably. Store the highest allowed sequence number
that we've announced and use it to detect oow packets.

Do this when mptcp options get written to the packet (wire format).
For this to work we need to move the write_options call until after
stack selected a new tcp window.
Acked-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

This patch added IPv6 support for do_transfer, and the test cases for
ADD_ADDR IPv6.
Acked-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Geliang Tang <geliangtang@gmail.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

When ADD_ADDR suboption includes an IPv6 address, the size is 28 octets.
It will not fit when other MPTCP suboptions are included in this packet,
e.g. DSS. So here we send out an ADD_ADDR dedicated packet to carry only
ADD_ADDR suboption, no other MPTCP suboptions.

In mptcp_pm_announce_addr, we check whether this is an IPv6 ADD_ADDR.
If it is, we set the flag MPTCP_ADD_ADDR_IPV6 to true. Then we call
mptcp_pm_nl_add_addr_send_ack to sent out a new pure ACK packet.

In mptcp_established_options_add_addr, we check whether this is a pure
ACK packet for ADD_ADDR. If it is, we drop all other MPTCP suboptions
in this packet, only put ADD_ADDR suboption in it.
Suggested-by: Paolo Abeni <pabeni@redhat.com>
Acked-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Geliang Tang <geliangtang@gmail.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

This patch changed the 'add_addr_signal' type from bool to char, so that
we could encode the addr type there.
Suggested-by: Paolo Abeni <pabeni@redhat.com>
Acked-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Geliang Tang <geliangtang@gmail.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

This will simplify all operation dealing with subflows
before accept time (e.g. data fin processing, add_addr).

The join list is already flushed by mptcp_stream_accept()
before returning the newly created msk to the user space.

This also fixes an potential bug present into the old code:
conn_list was manipulated without helding the msk lock
in mptcp_stream_accept().
Tested-by: Geliang Tang <geliangtang@gmail.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Add a test case where a link fails with multiple subflows.
The expectation is that MPTCP will transmit any data that
could not be delivered via the failed link on another subflow.
Co-developed-by: Geliang Tang <geliangtang@gmail.com>
Signed-off-by: Geliang Tang <geliangtang@gmail.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

In case a subflow path is blocked, MPTCP-level retransmit may not take
place anymore because such subflow is likely to have unacked data left
in its write queue.

Ignore subflows that have experienced loss and test next candidate.

Fixes: 3b1d6210 ("mptcp: implement and use MPTCP-level retransmission")
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

We need to cope with some more state transition for
fallback sockets, or could still end-up moving to TCP_CLOSE
too early and avoid spooling some pending data

Fixes: e16163b6 ("mptcp: refactor shutdown and close")
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Only mptcp_close() can actually cancel the workqueue,
no need to add and use this flag.
Reviewed-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Ido Schimmel says:

====================
mlxsw: Add support for nexthop objects

This patch set adds support for nexthop objects in mlxsw. Nexthop
objects are treated as another front-end for programming nexthops, in
addition to the existing IPv4 and IPv6 front-ends.

Patch #1 registers a listener to the nexthop notification chain and
parses the nexthop information into the existing mlxsw data structures
that are already used by the IPv4 and IPv6 front-ends. Blackhole
nexthops are currently rejected. Support will be added in a follow-up
patch set.

Patch #2 extends mlxsw to resolve its internal nexthop objects from the
nexthop identifier encoded in the FIB info of the notified routes.

Patch #3 finally removes the limitation of rejecting routes that use
nexthop objects.

Patch #4 adds a selftest.

Patches #5-#8 add generic forwarding selftests that can be used with
veth pairs or physical loopbacks.
====================

Link: https://lore.kernel.org/r/20201119130848.407918-1-idosch@idosch.orgSigned-off-by: Jakub Kicinski <kuba@kernel.org>

Add a nexthop objects version of gre_multipath.sh. Unlike the original
test, it also tests IPv6 overlay which is not possible with the legacy
nexthop implementation. See commit 9a2ad362 ("selftests: forwarding:
gre_multipath: Drop IPv6 tests") for more info.
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

In a similar fashion to router_multipath.sh and its nexthop objects
version router_mpath_nh.sh, create a nexthop objects version of
router.sh.

It reuses the same topology, but uses device-only nexthop objects
instead of legacy ones.
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

In addition to IPv4 multipath tests with IPv4 nexthops, also test IPv4
multipath with nexthops that use IPv6 link-local addresses.
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

routing_nh_obj() is used to configure the nexthop objects employed by
the test, but it is called twice resulting in "RTNETLINK answers: File
exists" messages.

Remove the first call, so that the function is only called after
setup_wait(), when all the interfaces are up and ready.
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Test that unsupported nexthop objects are rejected and that offload
indication is correctly set on: nexthop objects, nexthop group objects
and routes associated these objects.
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Now that the driver supports nexthop objects, the check is no longer
necessary. Remove it.
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

If the FIB info (i.e, 'struct fib_info', 'struct fib6_info') uses a
nexthop object, then use the object's identifier to resolve the nexthop
group.
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Register a listener to the nexthop notification chain and parse notified
nexthop objects into the existing mlxsw nexthop data structures.
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

If dsa_switch_ops::port_txtstamp() returns false, clone will be freed
immediately. Shouldn't store a pointer to freed memory.
Signed-off-by: Christian Eggers <ceggers@arri.de>
Reviewed-by: Vladimir Oltean <olteanv@gmail.com>
Tested-by: Vladimir Oltean <olteanv@gmail.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Link: https://lore.kernel.org/r/20201119110906.25558-1-ceggers@arri.deSigned-off-by: Jakub Kicinski <kuba@kernel.org>

Antonio Cardace says:

====================
netdevsim: add ethtool coalesce and ring settings

Output of ethtool-ring.sh and ethtool-coalesce.sh selftests:

  # ./ethtool-ring.sh
  PASSED all 4 checks
  # ./ethtool-coalesce.sh
  PASSED all 22 checks
  # ./ethtool-pause.sh
  PASSED all 7 checks
====================

Link: https://lore.kernel.org/r/20201118204522.5660-1-acardace@redhat.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

Add scripts to test ring and coalesce settings
of netdevsim.
Signed-off-by: Antonio Cardace <acardace@redhat.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

As pointed out by Michal Kubecek, getting the name
with the previous approach was racy, it's better
and easier to get the name of the device with this
patch's approach.

Essentialy the function doesn't need to exist
anymore as it's a simple 'ls' command.
Signed-off-by: Antonio Cardace <acardace@redhat.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Factor out some useful functions so that they can be reused
by other ethtool-netdevsim scripts.
Signed-off-by: Antonio Cardace <acardace@redhat.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Add ethtool ring and coalesce settings support for testing.
Signed-off-by: Antonio Cardace <acardace@redhat.com>
Reviewed-by: Michal Kubecek <mkubecek@suse.cz>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

This will help the refactoring in the next commit
when coalesce and ring settings are added.
Signed-off-by: Antonio Cardace <acardace@redhat.com>
Reviewed-by: Michal Kubecek <mkubecek@suse.cz>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

This bitmask represents all existing coalesce parameters.
Signed-off-by: Antonio Cardace <acardace@redhat.com>
Reviewed-by: Michal Kubecek <mkubecek@suse.cz>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Fix build of net/core/stream.o when CONFIG_INET is not enabled.
Fixes these build errors (sample):

ld: net/core/stream.o: in function `sk_stream_write_space':
(.text+0x27e): undefined reference to `tcp_stream_memory_free'
ld: (.text+0x29c): undefined reference to `tcp_stream_memory_free'
ld: (.text+0x2ab): undefined reference to `tcp_stream_memory_free'
ld: net/core/stream.o: in function `sk_stream_wait_memory':
(.text+0x5a1): undefined reference to `tcp_stream_memory_free'
ld: (.text+0x5bf): undefined reference to `tcp_stream_memory_free'

Fixes: 1c5f2ced ("tcp: avoid indirect call to tcp_stream_memory_free()")
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Reported-by: Randy Dunlap <rdunlap@infradead.org>
Link: https://lore.kernel.org/r/20201118194438.674-1-rdunlap@infradead.orgSigned-off-by: Jakub Kicinski <kuba@kernel.org>

The call to pc_delete_flow can kfree the iter object, so the following
dev_err message that accesses iter->entry can accessmemory that has
just been kfree'd.  Fix this by adding a temporary variable 'entry'
that has a copy of iter->entry and also use this when indexing into
the array mcam->entry2target_pffunc[]. Also print the unsigned value
using the %u format specifier rather than %d.

Addresses-Coverity: ("Read from pointer after free")
Fixes: 55307fcb ("octeontx2-af: Add mbox messages to install and delete MCAM rules")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Link: https://lore.kernel.org/r/20201118143803.463297-1-colin.king@canonical.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

Currently the variable err may be uninitialized if several of the if
statements are not executed in function nix_tx_vtag_decfg and a garbage
value in err is returned.  Fix this by initialized ret at the start of
the function.

Addresses-Coverity: ("Uninitialized scalar variable")
Fixes: 9a946def ("octeontx2-af: Modify nix_vtag_cfg mailbox to support TX VTAG entries")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Link: https://lore.kernel.org/r/20201118132502.461098-1-colin.king@canonical.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

The shifting of the u16 result from ntohs(proto) by 16 bits to the
left will be promoted to a 32 bit signed int and then sign-extended
to a u64.  In the event that the top bit of the return from ntohs(proto)
is set then all then all the upper 32 bits of a 64 bit long end up as
also being set because of the sign-extension. Fix this by casting to
a u64 long before the shift.

Addresses-Coverity: ("Unintended sign extension")
Fixes: f0c2982a ("octeontx2-pf: Add support for SR-IOV management function")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Link: https://lore.kernel.org/r/20201118130520.460365-1-colin.king@canonical.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

Srujana Challa says:

====================
Add Support for Marvell OcteonTX2 Cryptographic

This patchset adds support for CPT in OcteonTX2 admin function(AF).
CPT is a cryptographic accelerator unit and it includes microcoded
Giga Cipher engines.

OcteonTX2 SOC's resource virtualization unit (RVU) supports multiple
physical and virtual functions. Each of the PF/VF's functionality is
determined by what kind of resources are attached to it. When the CPT
block is attached to a VF, it can function as a security device.
The following document provides an overview of the hardware and
different drivers for the OcteonTX2 SOC:
https://www.kernel.org/doc/Documentation/networking/device_drivers/marvell/octeontx2.rst

This patch series includes:
- Patch to update existing Marvell sources to support CPT.
- Patch that adds mailbox messages to the admin function (AF) driver,
to configure CPT HW registers.
- Patch to provide debug information about CPT.
====================

Link: https://lore.kernel.org/r/20201118114416.28307-1-schalla@marvell.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

Add entries to debugfs at /sys/kernel/debug/octeontx2/cpt.

cpt_pc: dump cpt performance HW registers.
Usage:
cat /sys/kernel/debug/octeontx2/cpt/cpt_pc

cpt_ae_sts: show cpt asymmetric engines current state
Usage:
cat /sys/kernel/debug/octeontx2/cpt/cpt_ae_sts

cpt_se_sts: show cpt symmetric engines current state
Usage:
cat /sys/kernel/debug/octeontx2/cpt/cpt_se_sts

cpt_engines_info: dump cpt engine control registers.
Usage:
cat /sys/kernel/debug/octeontx2/cpt/cpt_engines_info

cpt_lfs_info: dump cpt lfs control registers.
Usage:
cat /sys/kernel/debug/octeontx2/cpt/cpt_lfs_info

cpt_err_info: dump cpt error registers.
Usage:
cat /sys/kernel/debug/octeontx2/cpt/cpt_err_info
Signed-off-by: Suheil Chandran <schandran@marvell.com>
Signed-off-by: Srujana Challa <schalla@marvell.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>