The previous patches handled the delivery_time before sch_handle_ingress().
This patch can now set the skb->mono_delivery_time to flag the skb->tstamp
is used as the mono delivery_time (EDT) instead of the (rcv) timestamp
and also clear it with skb_clear_delivery_time() after
sch_handle_ingress(). This will make the bpf_redirect_*()
to keep the mono delivery_time and used by a qdisc (fq) of
the egress-ing interface.
A latter patch will postpone the skb_clear_delivery_time() until the
stack learns that the skb is being delivered locally and that will
make other kernel forwarding paths (ip[6]_forward) able to keep
the delivery_time also. Thus, like the previous patches on using
the skb->mono_delivery_time bit, calling skb_clear_delivery_time()
is not limited within the CONFIG_NET_INGRESS to avoid too many code
churns among this set.
Signed-off-by: Martin KaFai Lau <kafai@fb.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
In __skb_tstamp_tx(), it may clone the egress skb and queues the clone to
the sk_error_queue. The outgoing skb may have the mono delivery_time
while the (rcv) timestamp is expected for the clone, so the
skb->mono_delivery_time bit needs to be cleared from the clone.
This patch adds the skb->mono_delivery_time clearing to the existing
__net_timestamp() and use it in __skb_tstamp_tx().
The __net_timestamp() fast path usage in dev.c is changed to directly
call ktime_get_real() since the mono_delivery_time bit is not set at
that point.
Signed-off-by: Martin KaFai Lau <kafai@fb.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
A latter patch will set the skb->mono_delivery_time to flag the skb->tstamp
is used as the mono delivery_time (EDT) instead of the (rcv) timestamp.
skb_clear_tstamp() will then keep this delivery_time during forwarding.
This patch is to make the network tapping (with af_packet) to handle
the delivery_time stored in skb->tstamp.
Regardless of tapping at the ingress or egress, the tapped skb is
received by the af_packet socket, so it is ingress to the af_packet
socket and it expects the (rcv) timestamp.
When tapping at egress, dev_queue_xmit_nit() is used. It has already
expected skb->tstamp may have delivery_time, so it does
skb_clone()+net_timestamp_set() to ensure the cloned skb has
the (rcv) timestamp before passing to the af_packet sk.
This patch only adds to clear the skb->mono_delivery_time
bit in net_timestamp_set().
When tapping at ingress, it currently expects the skb->tstamp is either 0
or the (rcv) timestamp. Meaning, the tapping at ingress path
has already expected the skb->tstamp could be 0 and it will get
the (rcv) timestamp by ktime_get_real() when needed.
There are two cases for tapping at ingress:
One case is af_packet queues the skb to its sk_receive_queue.
The skb is either not shared or new clone created. The newly
added skb_clear_delivery_time() is called to clear the
delivery_time (if any) and set the (rcv) timestamp if
needed before the skb is queued to the sk_receive_queue.
Another case, the ingress skb is directly copied to the rx_ring
and tpacket_get_timestamp() is used to get the (rcv) timestamp.
The newly added skb_tstamp() is used in tpacket_get_timestamp()
to check the skb->mono_delivery_time bit before returning skb->tstamp.
As mentioned earlier, the tapping@ingress has already expected
the skb may not have the (rcv) timestamp (because no sk has asked
for it) and has handled this case by directly calling ktime_get_real().
Signed-off-by: Martin KaFai Lau <kafai@fb.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Right now, skb->tstamp is reset to 0 whenever the skb is forwarded.
If skb->tstamp has the mono delivery_time, clearing it can hurt
the performance when it finally transmits out to fq@phy-dev.
The earlier patch added a skb->mono_delivery_time bit to
flag the skb->tstamp carrying the mono delivery_time.
This patch adds skb_clear_tstamp() helper which keeps
the mono delivery_time and clears everything else.
The delivery_time clearing will be postponed until the stack knows the
skb will be delivered locally. It will be done in a latter patch.
Signed-off-by: Martin KaFai Lau <kafai@fb.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
skb->tstamp was first used as the (rcv) timestamp.
The major usage is to report it to the user (e.g. SO_TIMESTAMP).
Later, skb->tstamp is also set as the (future) delivery_time (e.g. EDT in TCP)
during egress and used by the qdisc (e.g. sch_fq) to make decision on when
the skb can be passed to the dev.
Currently, there is no way to tell skb->tstamp having the (rcv) timestamp
or the delivery_time, so it is always reset to 0 whenever forwarded
between egress and ingress.
While it makes sense to always clear the (rcv) timestamp in skb->tstamp
to avoid confusing sch_fq that expects the delivery_time, it is a
performance issue [0] to clear the delivery_time if the skb finally
egress to a fq@phy-dev. For example, when forwarding from egress to
ingress and then finally back to egress:
tcp-sender => veth@netns => veth@hostns => fq@eth0@hostns
^ ^
reset rest
This patch adds one bit skb->mono_delivery_time to flag the skb->tstamp
is storing the mono delivery_time (EDT) instead of the (rcv) timestamp.
The current use case is to keep the TCP mono delivery_time (EDT) and
to be used with sch_fq. A latter patch will also allow tc-bpf@ingress
to read and change the mono delivery_time.
In the future, another bit (e.g. skb->user_delivery_time) can be added
for the SCM_TXTIME where the clock base is tracked by sk->sk_clockid.
[ This patch is a prep work. The following patches will
get the other parts of the stack ready first. Then another patch
after that will finally set the skb->mono_delivery_time. ]
skb_set_delivery_time() function is added. It is used by the tcp_output.c
and during ip[6] fragmentation to assign the delivery_time to
the skb->tstamp and also set the skb->mono_delivery_time.
A note on the change in ip_send_unicast_reply() in ip_output.c.
It is only used by TCP to send reset/ack out of a ctl_sk.
Like the new skb_set_delivery_time(), this patch sets
the skb->mono_delivery_time to 0 for now as a place
holder. It will be enabled in a latter patch.
A similar case in tcp_ipv6 can be done with
skb_set_delivery_time() in tcp_v6_send_response().
[0] (slide 22): https://linuxplumbersconf.org/event/11/contributions/953/attachments/867/1658/LPC_2021_BPF_Datapath_Extensions.pdf
Signed-off-by: Martin KaFai Lau <kafai@fb.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Vladimir Oltean says:
====================
DSA unicast filtering
This series doesn't attempt anything extremely brave, it just changes
the way in which standalone ports which support FDB isolation work.
Up until now, DSA has recommended that switch drivers configure
standalone ports in a separate VID/FID with learning disabled, and with
the CPU port as the only destination, reached trivially via flooding.
That works, except that standalone ports will deliver all packets to the
CPU. We can leverage the hardware FDB as a MAC DA filter, and disable
flooding towards the CPU port, to force the dropping of packets with
unknown MAC DA.
We handle port promiscuity by re-enabling flooding towards the CPU port.
This is relevant because the bridge puts its automatic (learning +
flooding) ports in promiscuous mode, and this makes some things work
automagically, like for example bridging with a foreign interface.
We don't delve yet into the territory of managing CPU flooding more
aggressively while under a bridge.
The only switch driver that benefits from this work right now is the
NXP LS1028A switch (felix). The others need to implement FDB isolation
first, before DSA is going to install entries to the port's standalone
database. Otherwise, these entries might collide with bridge FDB/MDB
entries.
This work was done mainly to have all the required features in place
before somebody starts seriously architecting DSA support for multiple
CPU ports. Otherwise it is much more difficult to bolt these features on
top of multiple CPU ports.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
In order for the Felix DSA driver to be able to turn on/off flooding
towards its CPU port, we need to redirect calls on the NPI port to
actually act upon the index in the analyzer block that corresponds to
the CPU port module. This was never necessary until now because DSA
(or the bridge) never called ocelot_port_bridge_flags() for the NPI
port.
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
felix_migrate_flood_to_tag_8021q_port() takes care of clearing the
flooding bits on the old CPU port (which was the CPU port module), so
manually clearing this bit from PGID_UC, PGID_MC, PGID_BC is redundant.
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
The driver probes with all ports as standalone, and it supports unicast
filtering. So DSA will call port_fdb_add() for all necessary addresses
on the current CPU port. We also handle migrations when the CPU port
hardware resource changes (on tagging protocol change), so there should
not be any unknown address that we have to receive while not promiscuous.
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
When the tagging protocol changes from "ocelot" to "ocelot-8021q" or in
reverse, the DSA promiscuity setting that was applied for the old CPU
port must be transferred to the new one.
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
The "ocelot" and "ocelot-8021q" tagging protocols make use of different
hardware resources, and host FDB entries have different destination
ports in the switch analyzer module, practically speaking.
So when the user requests a tagging protocol change, the driver must
migrate all host FDB and MDB entries from the NPI port (in fact CPU port
module) towards the same physical port, but this time used as a regular
port.
It is pointless for the felix driver to keep a copy of the host
addresses, when we can create and export DSA helpers for walking through
the addresses that it already needs to keep on the CPU port, for
refcounting purposes.
felix_classify_db() is moved up to avoid a forward declaration.
We pass "bool change" because dp->fdbs and dp->mdbs are uninitialized
lists when felix_setup() first calls felix_set_tag_protocol(), so we
need to avoid calling dsa_port_walk_fdbs() during probe time.
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
DSA can treat IFF_PROMISC and IFF_ALLMULTI on standalone user ports as
signifying whether packets with an unknown MAC DA will be received or
not. Since known MAC DAs are handled by FDB/MDB entries, this means that
promiscuity is analogous to including/excluding the CPU port from the
flood domain of those packets.
There are two ways to signal CPU flooding to drivers.
The first (chosen here) is to synthesize a call to
ds->ops->port_bridge_flags() for the CPU port, with a mask of
BR_FLOOD | BR_MCAST_FLOOD. This has the effect of turning on egress
flooding on the CPU port regardless of source.
The alternative would be to create a new ds->ops->port_host_flood()
which is called per user port. Some switches (sja1105) have a flood
domain that is managed per {ingress port, egress port} pair, so it would
make more sense for this kind of switch to not flood the CPU from port A
if just port B requires it. Nonetheless, the sja1105 has other quirks
that prevent it from making use of unicast filtering, and without a
concrete user making use of this feature, I chose not to implement it.
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
To be able to safely turn off CPU flooding for standalone ports, we need
to ensure that the dev_addr of each DSA slave interface is installed as
a standalone host FDB entry for compatible switches.
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
In preparation of disabling flooding towards the CPU in standalone ports
mode, identify the addresses requested by upper interfaces and use the
new API for DSA FDB isolation to request the hardware driver to offload
these as FDB or MDB objects. The objects belong to the user port's
database, and are installed pointing towards the CPU port.
Because dev_uc_add()/dev_mc_add() is VLAN-unaware, we offload to the
port standalone database addresses with VID 0 (also VLAN-unaware).
So this excludes switches with global VLAN filtering from supporting
unicast filtering, because there, it is possible for a port of a switch
to join a VLAN-aware bridge, and this changes the VLAN awareness of
standalone ports, requiring VLAN-aware standalone host FDB entries.
For the same reason, hellcreek, which requires VLAN awareness in
standalone mode, is also exempted from unicast filtering.
We create "standalone" variants of dsa_port_host_fdb_add() and
dsa_port_host_mdb_add() (and the _del coresponding functions).
We also create a separate work item type for handling deferred
standalone host FDB/MDB entries compared to the switchdev one.
This is done for the purpose of clarity - the procedure for offloading a
bridge FDB entry is different than offloading a standalone one, and
the switchdev event work handles only FDBs anyway, not MDBs.
Deferral is needed for standalone entries because ndo_set_rx_mode runs
in atomic context. We could probably optimize things a little by first
queuing up all entries that need to be offloaded, and scheduling the
work item just once, but the data structures that we can pass through
__dev_uc_sync() and __dev_mc_sync() are limiting (there is nothing like
a void *priv), so we'd have to keep the list of queued events somewhere
in struct dsa_switch, and possibly a lock for it. Too complicated for
now.
Adding the address to the master is handled by dev_uc_sync(), adding it
to the hardware is handled by __dev_uc_sync(). So this is the reason why
dsa_port_standalone_host_fdb_add() does not call dev_uc_add(). Not that
it had the rtnl_mutex anyway - ndo_set_rx_mode has it, but is atomic.
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
We are preparing to add API in port.c that adds FDB and MDB entries that
correspond to the port's standalone database. Rename the existing
methods to make it clear that the FDB and MDB entries offloaded come
from the bridge database.
Since the function names lengthen in dsa_slave_switchdev_event_work(),
we place "addr" and "vid" in temporary variables, to shorten those.
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Lennert Buytenhek explains in commit df02c6ff2e ("dsa: fix master
interface allmulti/promisc handling"), dated Nov 2008, that changing the
promiscuity of interfaces that are down (here the master) is broken.
This fact regarding promisc/allmulti has changed since commit
b6c40d68ff ("net: only invoke dev->change_rx_flags when device is UP")
by Vlad Yasevich, dated Nov 2013.
Therefore, DSA now has unnecessary complexity to handle master state
transitions from down to up. In fact, syncing the unicast and multicast
addresses can happen completely asynchronously to the administrative
state changes.
This change reduces that complexity by effectively fully reverting
commit df02c6ff2e ("dsa: fix master interface allmulti/promisc
handling").
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Add a new ice_gnss.c file for holding the basic GNSS module functions.
If the device supports GNSS module, call the new ice_gnss_init and
ice_gnss_release functions where appropriate.
Implement basic functionality for reading the data from GNSS module
using TTY device.
Add I2C read AQ command. It is now required for controlling the external
physical connectors via external I2C port expander on E810-T adapters.
Future changes will introduce write functionality.
Signed-off-by: Karol Kolacinski <karol.kolacinski@intel.com>
Signed-off-by: Sudhansu Sekhar Mishra <sudhansu.mishra@intel.com>
Tested-by: Sunitha Mekala <sunithax.d.mekala@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Krzysztof Kozlowski says:
====================
nfc: llcp: few cleanups/improvements
These are improvements, not fixing any experienced issue, just looking correct
to me from the code point of view.
Changes since v1
================
1. Split from the fix.
Testing
=======
Under QEMU only. The NFC/LLCP code was not really tested on a device.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
This reverts commit 17f7ae16ae.
The commit brought a new socket state LLCP_DISCONNECTING, which was
never set, only read, so socket could never set to such state.
Remove the dead code.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
nfc_llcp_sock_link() is called in all paths (bind/connect) as a last
action, still protected with lock_sock(). When cleaning up in
llcp_sock_release(), call nfc_llcp_sock_unlink() in a mirrored way:
earlier and still under the lock_sock().
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Use test_bit() instead of open-coding it, just like in other places
touching the bitmap.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Coding style encourages centralized exiting of functions, so rewrite
llcp_sock_bind() error paths to use such pattern. This reduces the
duplicated cleanup code, make success path visually shorter and also
cleans up the errors in proper order (in reversed way from
initialization).
No functional impact expected.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
The llcp_sock_connect() error paths were using a mixed way of central
exit (goto) and cleanup
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Nullify the llcp_sock->dev on llcp_sock_connect() error paths,
symmetrically to the code llcp_sock_bind(). The non-NULL value of
llcp_sock->dev is used in a few places to check whether the socket is
still valid.
There was no particular issue observed with missing NULL assignment in
connect() error path, however a similar case - in the bind() error path
- was triggereable. That one was fixed in commit 4ac06a1e01 ("nfc:
fix NULL ptr dereference in llcp_sock_getname() after failed connect"),
so the change here seems logical as well.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Ido Schimmel says:
====================
HW counters for soft devices
Petr says:
Offloading switch device drivers may be able to collect statistics of the
traffic taking place in the HW datapath that pertains to a certain soft
netdevice, such as a VLAN. In this patch set, add the necessary
infrastructure to allow exposing these statistics to the offloaded
netdevice in question, and add mlxsw offload.
Across HW platforms, the counter itself very likely constitutes a limited
resource, and the act of counting may have a performance impact. Therefore
this patch set makes the HW statistics collection opt-in and togglable from
userspace on a per-netdevice basis.
Additionally, HW devices may have various limiting conditions under which
they can realize the counter. Therefore it is also possible to query
whether the requested counter is realized by any driver. In TC parlance,
which is to a degree reused in this patch set, two values are recognized:
"request" tracks whether the user enabled collecting HW statistics, and
"used" tracks whether any HW statistics are actually collected.
In the past, this author has expressed the opinion that `a typical user
doing "ip -s l sh", including various scripts, wants to see the full
picture and not worry what's going on where'. While that would be nice,
unfortunately it cannot work:
- Packets that trap from the HW datapath to the SW datapath would be
double counted.
For a given netdevice, some traffic can be purely a SW artifact, and some
may flow through the HW object corresponding to the netdevice. But some
traffic can also get trapped to the SW datapath after bumping the HW
counter. It is not clear how to make sure double-counting does not occur
in the SW datapath in that case, while still making sure that possibly
divergent SW forwarding path gets bumped as appropriate.
So simply adding HW and SW stats may work roughly, most of the time, but
there are scenarios where the result is nonsensical.
- HW devices will have limitations as to what type of traffic they can
count.
In case of mlxsw, which is part of this patch set, there is no reasonable
way to count all traffic going through a certain netdevice, such as a
VLAN netdevice enslaved to a bridge. It is however very simple to count
traffic flowing through an L3 object, such as a VLAN netdevice with an IP
address.
Similarly for physical netdevices, the L3 object at which the counter is
installed is the subport carrying untagged traffic.
These are not "just counters". It is important that the user understands
what is being counted. It would be incorrect to conflate these statistics
with another existing statistics suite.
To that end, this patch set introduces a statistics suite called "L3
stats". This label should make it easy to understand what is being counted,
and to decide whether a given device can or cannot implement this suite for
some type of netdevice. At the same time, the code is written to make
future extensions easy, should a device pop up that can implement a
different flavor of statistics suite (say L2, or an address-family-specific
suite).
For example, using a work-in-progress iproute2[1], to turn on and then list
the counters on a VLAN netdevice:
# ip stats set dev swp1.200 l3_stats on
# ip stats show dev swp1.200 group offload subgroup l3_stats
56: swp1.200: group offload subgroup l3_stats on used on
RX: bytes packets errors dropped missed mcast
0 0 0 0 0 0
TX: bytes packets errors dropped carrier collsns
0 0 0 0 0 0
The patchset progresses as follows:
- Patch #1 is a cleanup.
- In patch #2, remove the assumption that all LINK_OFFLOAD_XSTATS are
dev-backed.
The only attribute defined under the nest is currently
IFLA_OFFLOAD_XSTATS_CPU_HIT. L3_STATS differs from CPU_HIT in that the
driver that supplies the statistics is not the same as the driver that
implements the netdevice. Make the code compatible with this in patch #2.
- In patch #3, add the possibility to filter inside nests.
The filter_mask field of RTM_GETSTATS header determines which
top-level attributes should be included in the netlink response. This
saves processing time by only including the bits that the user cares
about instead of always dumping everything. This is doubly important
for HW-backed statistics that would typically require a trip to the
device to fetch the stats. In this patch, the UAPI is extended to
allow filtering inside IFLA_STATS_LINK_OFFLOAD_XSTATS in particular,
but the scheme is easily extensible to other nests as well.
- In patch #4, propagate extack where we need it.
In patch #5, make it possible to propagate errors from drivers to the
user.
- In patch #6, add the in-kernel APIs for keeping track of the new stats
suite, and the notifiers that the core uses to communicate with the
drivers.
- In patch #7, add UAPI for obtaining the new stats suite.
- In patch #8, add a new UAPI message, RTM_SETSTATS, which will carry
the message to toggle the newly-added stats suite.
In patch #9, add the toggle itself.
At this point the core is ready for drivers to add support for the new
stats suite.
- In patches #10, #11 and #12, apply small tweaks to mlxsw code.
- In patch #13, add support for L3 stats, which are realized as RIF
counters.
- Finally in patch #14, a selftest is added to the net/forwarding
directory. Technically this is a HW-specific test, in that without a HW
implementing the counters, it just will not pass. But devices that
support L3 statistics at all are likely to be able to reuse this
selftest, so it seems appropriate to put it in the general forwarding
directory.
We also have a netdevsim implementation, and a corresponding selftest that
verifies specifically some of the core code. We intend to contribute these
later. Interested parties can take a look at the raw code at [2].
[1] https://github.com/pmachata/iproute2/commits/soft_counters
[2] https://github.com/pmachata/linux_mlxsw/commits/petrm_soft_counters_2
v2:
- Patch #3:
- Do not declare strict_start_type at the new policies, since they are
used with nla_parse_nested() (sans _deprecated).
- Use NLA_POLICY_NESTED to declare what the nest contents should be
- Use NLA_POLICY_MASK instead of BITFIELD32 for the filtering
attribute.
- Patch #6:
- s/monotonous/monotonic/ in commit message
- Use a newly-added struct rtnl_hw_stats64 for stats transfer
- Patch #7:
- Use a newly-added struct rtnl_hw_stats64 for stats transfer
- Patch #8:
- Do not declare strict_start_type at the new policies, since they are
used with nla_parse_nested() (sans _deprecated).
- Patch #13:
- Use a newly-added struct rtnl_hw_stats64 for stats transfer
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Add a test that verifies operation of L3 HW statistics.
Signed-off-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Spectrum machines support L3 stats by binding a counter to a RIF, a
hardware object representing a router interface. Recognize the netdevice
notifier events, NETDEV_OFFLOAD_XSTATS_*, to support enablement,
disablement, and reporting back to core.
As a netdevice gains a RIF, if L3 stats are enabled, install the counters,
and ping the core so that a userspace notification can be emitted.
Similarly, as a netdevice loses a RIF, push the as-yet-unreported
statistics to the core, so that they are not lost, and ping the core to
emit userspace notification.
Signed-off-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Several more events are coming in the following patches, and extending the
if statement is getting awkward. Instead, convert it to a switch.
Signed-off-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
The mlxsw_sp reference is carried by the mlxsw_sp_rif object that is passed
to these functions as well. Just deduce the former from the latter,
and drop the explicit mlxsw_sp parameter. Adapt callers.
Signed-off-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
The function mlxsw_reg_ritr_counter_pack() formats a register to configure
a router interface (RIF) counter. The parameter `egress' determines whether
an ingress or egress counter is to be configured. RITR, the register in
question, has two sets of counter-related fields: one for ingress, one for
egress. When setting values of the fields, the function sets the proper
counter index field, but when setting the counter type, it always sets the
egress field. Thus configuration of ingress counters is broken, and in fact
an attempt to configure an ingress counter mangles a previously configured
egress counter.
This was never discovered, because there is currently no way to enable
ingress counters on a router interface, only the egress one.
Fix in an obvious way.
Signed-off-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
The offloaded HW stats are designed to allow per-netdevice enablement and
disablement. Add an attribute, IFLA_STATS_SET_OFFLOAD_XSTATS_L3_STATS,
which should be carried by the RTM_SETSTATS message, and expresses a desire
to toggle L3 offload xstats on or off.
As part of the above, add an exported function rtnl_offload_xstats_notify()
that drivers can use when they have installed or deinstalled the counters
backing the HW stats.
At this point, it is possible to enable, disable and query L3 offload
xstats on netdevices. (However there is no driver actually implementing
these.)
Signed-off-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
The offloaded HW stats are designed to allow per-netdevice enablement and
disablement. These stats are only accessible through RTM_GETSTATS, and
therefore should be toggled by a RTM_SETSTATS message. Add it, and the
necessary skeleton handler.
Signed-off-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Add a new IFLA_STATS_LINK_OFFLOAD_XSTATS child attribute,
IFLA_OFFLOAD_XSTATS_L3_STATS, to carry statistics for traffic that takes
place in a HW router.
The offloaded HW stats are designed to allow per-netdevice enablement and
disablement. Additionally, as a netdevice is configured, it may become or
cease being suitable for binding of a HW counter. Both of these aspects
need to be communicated to the userspace. To that end, add another child
attribute, IFLA_OFFLOAD_XSTATS_HW_S_INFO:
- attr nest IFLA_OFFLOAD_XSTATS_HW_S_INFO
- attr nest IFLA_OFFLOAD_XSTATS_L3_STATS
- attr IFLA_OFFLOAD_XSTATS_HW_S_INFO_REQUEST
- {0,1} as u8
- attr IFLA_OFFLOAD_XSTATS_HW_S_INFO_USED
- {0,1} as u8
Thus this one attribute is a nest that can be used to carry information
about various types of HW statistics, and indexing is very simply done by
wrapping the information for a given statistics suite into the attribute
that carries the suite is the RTM_GETSTATS query. At the same time, because
_HW_S_INFO is nested directly below IFLA_STATS_LINK_OFFLOAD_XSTATS, it is
possible through filtering to request only the metadata about individual
statistics suites, without having to hit the HW to get the actual counters.
Signed-off-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Offloading switch device drivers may be able to collect statistics of the
traffic taking place in the HW datapath that pertains to a certain soft
netdevice, such as VLAN. Add the necessary infrastructure to allow exposing
these statistics to the offloaded netdevice in question. The API was shaped
by the following considerations:
- Collection of HW statistics is not free: there may be a finite number of
counters, and the act of counting may have a performance impact. It is
therefore necessary to allow toggling whether HW counting should be done
for any particular SW netdevice.
- As the drivers are loaded and removed, a particular device may get
offloaded and unoffloaded again. At the same time, the statistics values
need to stay monotonic (modulo the eventual 64-bit wraparound),
increasing only to reflect traffic measured in the device.
To that end, the netdevice keeps around a lazily-allocated copy of struct
rtnl_link_stats64. Device drivers then contribute to the values kept
therein at various points. Even as the driver goes away, the struct stays
around to maintain the statistics values.
- Different HW devices may be able to count different things. The
motivation behind this patch in particular is exposure of HW counters on
Nvidia Spectrum switches, where the only practical approach to counting
traffic on offloaded soft netdevices currently is to use router interface
counters, and count L3 traffic. Correspondingly that is the statistics
suite added in this patch.
Other devices may be able to measure different kinds of traffic, and for
that reason, the APIs are built to allow uniform access to different
statistics suites.
- Because soft netdevices and offloading drivers are only loosely bound, a
netdevice uses a notifier chain to communicate with the drivers. Several
new notifiers, NETDEV_OFFLOAD_XSTATS_*, have been added to carry messages
to the offloading drivers.
- Devices can have various conditions for when a particular counter is
available. As the device is configured and reconfigured, the device
offload may become or cease being suitable for counter binding. A
netdevice can use a notifier type NETDEV_OFFLOAD_XSTATS_REPORT_USED to
ping offloading drivers and determine whether anyone currently implements
a given statistics suite. This information can then be propagated to user
space.
When the driver decides to unoffload a netdevice, it can use a
newly-added function, netdev_offload_xstats_report_delta(), to record
outstanding collected statistics, before destroying the HW counter.
This patch adds a helper, call_netdevice_notifiers_info_robust(), for
dispatching a notifier with the possibility of unwind when one of the
consumers bails. Given the wish to eventually get rid of the global
notifier block altogether, this helper only invokes the per-netns notifier
block.
Signed-off-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Obtaining stats for the IFLA_STATS_LINK_OFFLOAD_XSTATS nest involves a HW
access, and can fail for more reasons than just netlink message size
exhaustion. Therefore do not always return -EMSGSIZE on the failure path,
but respect the error code provided by the callee. Set the error explicitly
where it is reasonable to assume -EMSGSIZE as the failure reason.
Signed-off-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Later patches add handlers for more HW-backed statistics. An extack will be
useful when communicating HW / driver errors to the client. Add the
arguments as appropriate.
Signed-off-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
The filter_mask field of RTM_GETSTATS header determines which top-level
attributes should be included in the netlink response. This saves
processing time by only including the bits that the user cares about
instead of always dumping everything. This is doubly important for
HW-backed statistics that would typically require a trip to the device to
fetch the stats.
So far there was only one HW-backed stat suite per attribute. However,
IFLA_STATS_LINK_OFFLOAD_XSTATS is a nest, and will gain a new stat suite in
the following patches. It would therefore be advantageous to be able to
filter within that nest, and select just one or the other HW-backed
statistics suite.
Extend rtnetlink so that RTM_GETSTATS permits attributes in the payload.
The scheme is as follows:
- RTM_GETSTATS
- struct if_stats_msg
- attr nest IFLA_STATS_GET_FILTERS
- attr IFLA_STATS_LINK_OFFLOAD_XSTATS
- u32 filter_mask
This scheme reuses the existing enumerators by nesting them in a dedicated
context attribute. This is covered by policies as usual, therefore a
gradual opt-in is possible. Currently only IFLA_STATS_LINK_OFFLOAD_XSTATS
nest has filtering enabled, because for the SW counters the issue does not
seem to be that important.
rtnl_offload_xstats_get_size() and _fill() are extended to observe the
requested filters.
Signed-off-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
The IFLA_STATS_LINK_OFFLOAD_XSTATS attribute is a nest whose child
attributes carry various special hardware statistics. The code that handles
this nest was written with the idea that all these statistics would be
exposed by the device driver of a physical netdevice.
In the following patches, a new attribute is added to the abovementioned
nest, which however can be defined for some soft netdevices. The NDO-based
approach to querying these does not work, because it is not the soft
netdevice driver that exposes these statistics, but an offloading NIC
driver that does so.
The current code does not scale well to this usage. Simply rewrite it back
to the pattern seen in other fill-like and get_size-like functions
elsewhere.
Extract to helpers the code that is concerned with handling specifically
NDO-backed statistics so that it can be easily reused should more such
statistics be added.
Signed-off-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
The currently used names rtnl_get_offload_stats() and
rtnl_get_offload_stats_size() do not clearly show the namespace. The former
function additionally seems to have been named this way in accordance with
the NDO name, as opposed to the naming used in the rtnetlink.c file (and
indeed elsewhere in the netlink handling code). As more and
differently-flavored attributes are introduced, a common clear prefix is
needed for all related functions.
Rename the functions to follow the rtnl_offload_xstats_* naming scheme.
Signed-off-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Today when VFs are put in promiscuous mode, they can request PF
to configure device for them to receive all VLANs traffic regardless
of what vlan is configured by the PF (via ip link) and PF allows this
config request regardless of whether VF is trusted or not.
From security POV, when VLAN is configured for VF through PF (via ip link),
honour such config requests from VF only when they are configured to be
trusted, otherwise restrict such VFs vlan promisc mode config.
Cc: stable@vger.kernel.org
Fixes: f990c82c38 ("qed*: Add support for ndo_set_vf_trust")
Signed-off-by: Manish Chopra <manishc@marvell.com>
Signed-off-by: Ariel Elior <aelior@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Driver does support SR-IOV VFs trust configuration but
it does not display it when queried via ip link utility.
Cc: stable@vger.kernel.org
Fixes: f990c82c38 ("qed*: Add support for ndo_set_vf_trust")
Signed-off-by: Manish Chopra <manishc@marvell.com>
Signed-off-by: Ariel Elior <aelior@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
@ 2022-03-02 10:39 Bhupesh Sharma
2022-03-02 10:39 ` [PATCH v2 1/2 net-next] net: stmmac: Add support for SM8150 Bhupesh Sharma
2022-03-02 10:39 ` [PATCH v2 2/2 net-next] net: stmmac: dwmac-qcom-ethqos: Adjust rgmii loopback_en per platform Bhupesh Sharma
0 siblings, 2 replies; 3+ messages in thread
Bhupesh Sharma says:
====================
net: stmmac: Enable support for Qualcomm SA8155p-ADP board
Changes since v1:
-----------------
- v1 can be seen here: https://lore.kernel.org/netdev/20220126221725.710167-1-bhupesh.sharma@linaro.org/t/
- Fixed review comments from Bjorn - broke the v1 series into two
separate series - one each for 'net' tree and 'arm clock/dts' tree
- so as to ease review of the same from the respective maintainers.
- This series is intended for the 'net' tree.
The SA8155p-ADP board supports on-board ethernet (Gibabit Interface),
with support for both RGMII and RMII buses.
This patchset adds the support for the same.
Note that this patchset is based on an earlier sent patchset
for adding PDC controller support on SM8150 (see [1]).
[1]. https://lore.kernel.org/linux-arm-msm/20220226184028.111566-1-bhupesh.sharma@linaro.org/T/
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Not all platforms should have RGMII_CONFIG_LOOPBACK_EN and the result it
about 50% packet loss on incoming messages. So make it possile to
configure this per compatible and enable it for QCS404.
Cc: David S. Miller <davem@davemloft.net>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This adds compatible, POR config & driver data for ethernet controller
found in SM8150 SoC.
Cc: David S. Miller <davem@davemloft.net>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
[bhsharma: Massage the commit log and other cosmetic changes]
Signed-off-by: Bhupesh Sharma <bhupesh.sharma@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Joe Damato says:
====================
page_pool: Add stats counters
Greetings:
Welcome to v9.
This revisions adds a commit which updates the page_pool documentation to
describe the stats API, structures, and fields.
Additionally, this revision contains a minor cosmetic change suggested by
Saeed in page_pool_recycle_in_ring in commit 2: "page_pool: Add recycle
stats", which removes an unnecessary #ifdef.
There are no functional changes in this revision.
Benchmark output from the v7 cover [1] is pasted below, as it is still
relevant since no functional changes have been made in this revision:
Benchmarks have been re-run. As always, results between runs are highly
variable; you'll find results showing that stats disabled are both faster
and slower than stats enabled in back to back benchmark runs.
Raw benchmark output with stats off [2] and stats on [3] are available for
examination.
Test system:
- 2x Intel(R) Xeon(R) Gold 6140 CPU @ 2.30GHz
- 2 NUMA zones, with 18 cores per zone and 2 threads per core
bench_page_pool_simple results, loops=200000000
test name stats enabled stats disabled
cycles nanosec cycles nanosec
for_loop 0 0.335 0 0.336
atomic_inc 14 6.106 13 6.022
lock 30 13.365 32 13.968
no-softirq-page_pool01 75 32.884 74 32.308
no-softirq-page_pool02 79 34.696 74 32.302
no-softirq-page_pool03 110 48.005 105 46.073
tasklet_page_pool01_fast_path 14 6.156 14 6.211
tasklet_page_pool02_ptr_ring 41 18.028 39 17.391
tasklet_page_pool03_slow 107 46.646 105 46.123
bench_page_pool_cross_cpu results, loops=20000000 returning_cpus=4:
test name stats enabled stats disabled
cycles nanosec cycles nanosec
page_pool_cross_cpu CPU(0) 3973 1731.596 4015 1750.015
page_pool_cross_cpu CPU(1) 3976 1733.217 4022 1752.864
page_pool_cross_cpu CPU(2) 3973 1731.615 4016 1750.433
page_pool_cross_cpu CPU(3) 3976 1733.218 4021 1752.806
page_pool_cross_cpu CPU(4) 994 433.305 1005 438.217
page_pool_cross_cpu average 3378 - 3415 -
bench_page_pool_cross_cpu results, loops=20000000 returning_cpus=8:
test name stats enabled stats disabled
cycles nanosec cycles nanosec
page_pool_cross_cpu CPU(0) 6969 3037.488 6909 3011.463
page_pool_cross_cpu CPU(1) 6974 3039.469 6913 3012.961
page_pool_cross_cpu CPU(2) 6969 3037.575 6910 3011.585
page_pool_cross_cpu CPU(3) 6974 3039.415 6913 3012.961
page_pool_cross_cpu CPU(4) 6969 3037.288 6909 3011.368
page_pool_cross_cpu CPU(5) 6972 3038.732 6913 3012.920
page_pool_cross_cpu CPU(6) 6969 3037.350 6909 3011.386
page_pool_cross_cpu CPU(7) 6973 3039.356 6913 3012.921
page_pool_cross_cpu CPU(8) 871 379.934 864 376.620
page_pool_cross_cpu average 6293 - 6239 -
Thanks.
[1]: https://lore.kernel.org/all/1645810914-35485-1-git-send-email-jdamato@fastly.com/
[2]: 327dcd71d1/v7_stats_disabled
[3]: 327dcd71d1/v7_stats_enabled
v8 -> v9:
- Add documentation about the page_pool_get_stats API, stats
structures, and fields to Documentation/networking/page_pool.rst.
- Remove unnecessary #ifdef in page_pool_recycle_in_ring.
v7 -> v8:
- Rename mlx5 ethtool stats so that users have a better idea of
their meaning.
v6 -> v7:
- stats split out into two structs one single per-page pool struct
for allocation path stats and one per-cpu pointer for recycle
path stats.
- page_pool_get_stats updated to use a wrapper struct to gather
stats for allocation and recycle stats with a single argument.
- placement of structs adjusted
- mlx5 driver modified to use page_pool_get_stats API
v5 -> v6:
- Per cpu page_pool_stats struct pointer is now marked as
____cacheline_aligned_in_smp. Placement of the field in the
struct is unchanged; it is the last field.
v4 -> v5:
- Fixed the description of the kernel option in Kconfig.
- Squashed commits 1-10 from v4 into a single commit for easier
review.
- Changed the comment style of the comment for
the this_cpu_inc_alloc_stat macro.
- Changed the return type of page_pool_get_stats from struct
page_pool_stat * to bool.
v3 -> v4:
- Restructured stats to be per-cpu per-pool.
- Global stats and proc file were removed.
- Exposed an API (page_pool_get_stats) for batching the pool stats.
v2 -> v3:
- patch 8/10 ("Add stat tracking cache refill") fixed placement of
counter increment.
- patch 10/10 ("net-procfs: Show page pool stats in proc") updated:
- fix unused label warning from kernel test robot,
- fixed page_pool_seq_show to only display the refill stat
once,
- added a remove_proc_entry for page_pool_stat to
dev_proc_net_exit.
v1 -> v2:
- A new kernel config option has been added, which defaults to N,
preventing this code from being compiled in by default
- The stats structure has been converted to a per-cpu structure
- The stats are now exported via proc (/proc/net/page_pool_stat)
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
This change adds support for the page_pool_get_stats API to mlx5. If the
user has enabled CONFIG_PAGE_POOL_STATS in their kernel, ethtool will
output page pool stats.
Signed-off-by: Joe Damato <jdamato@fastly.com>
Acked-by: Saeed Mahameed <saeed@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Add the new stats API, kernel config parameter, and stats structure
information to the page_pool documentation.
Signed-off-by: Joe Damato <jdamato@fastly.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Adds a function page_pool_get_stats which can be used by drivers to obtain
stats for a specified page_pool.
Signed-off-by: Joe Damato <jdamato@fastly.com>
Acked-by: Jesper Dangaard Brouer <brouer@redhat.com>
Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Add per-cpu stats tracking page pool recycling events:
- cached: recycling placed page in the page pool cache
- cache_full: page pool cache was full
- ring: page placed into the ptr ring
- ring_full: page released from page pool because the ptr ring was full
- released_refcnt: page released (and not recycled) because refcnt > 1
Signed-off-by: Joe Damato <jdamato@fastly.com>
Acked-by: Jesper Dangaard Brouer <brouer@redhat.com>
Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Add per-pool statistics counters for the allocation path of a page pool.
These stats are incremented in softirq context, so no locking or per-cpu
variables are needed.
This code is disabled by default and a kernel config option is provided for
users who wish to enable them.
The statistics added are:
- fast: successful fast path allocations
- slow: slow path order-0 allocations
- slow_high_order: slow path high order allocations
- empty: ptr ring is empty, so a slow path allocation was forced.
- refill: an allocation which triggered a refill of the cache
- waive: pages obtained from the ptr ring that cannot be added to
the cache due to a NUMA mismatch.
Signed-off-by: Joe Damato <jdamato@fastly.com>
Acked-by: Jesper Dangaard Brouer <brouer@redhat.com>
Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
