GitHub/moto-9609/android_kernel_motorola_exynos9610.git
8 years agonet sched: actions use tcf_lastuse_update for consistency
Jamal Hadi Salim [Mon, 6 Jun 2016 10:32:53 +0000 (06:32 -0400)]
net sched: actions use tcf_lastuse_update for consistency

Signed-off-by: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet/sched: cls_flower: Introduce support in SKIP SW flag
Amir Vadai [Sun, 5 Jun 2016 14:11:18 +0000 (17:11 +0300)]
net/sched: cls_flower: Introduce support in SKIP SW flag

In order to make a filter processed only by hardware, skip_sw flag
should be supplied. This is an addition to the already existing skip_hw
flag (filter will be processed by software only). If no flag is
specified, filter will be processed by both software and hardware.

If only hardware offloaded filters exist, fl_classify() will return
without doing anything.

A following userspace patch will be sent once kernel patch is accepted.

Example:

tc filter add dev enp0s9 protocol ip prio 20 parent ffff: \
flower \
ip_proto 6 \
indev enp0s9 \
skip_sw \
action skbedit mark 0x1234

Signed-off-by: Amir Vadai <amirva@mellanox.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Acked-by: John Fastabend <john.r.fastabend@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoMerge branch 'qed-iov-fw-reqs'
David S. Miller [Tue, 7 Jun 2016 22:40:12 +0000 (15:40 -0700)]
Merge branch 'qed-iov-fw-reqs'

Yuval Mintz says:

====================
qed: IOV series - relax firmware requirements

In order for VFs to work, current implementation demands that the VF's
requried storm firmware would be exactly the version that was loaded by
the PF, which is a very harsh requirement.
This patch series is intended to relax this -
the recently submitted firmware is intended to be forward/backward
compatible in its fastpath [slowpath is configured by PF on behalf of VF],
and so VFs would only be required of having the same major faspath HSI in
order to work.

Most of the other patches in this series extend current forward
compatibilty of driver to reduce chance of breaking PF/VF compatibility
in the future. A few are unrelated IOV changes.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoqed: PF to reply to unknown messages
Yuval Mintz [Sun, 5 Jun 2016 10:11:16 +0000 (13:11 +0300)]
qed: PF to reply to unknown messages

If a future VF would send the PF an unknown message, the PF today would
not send a reply. This would have 2 bad effects:
  a. VF would have to timeout on the request.
  b. If VF were to send an additional message to PF, firmware would mark
     it as malicious.

Instead, if there's some valid reply-address on the message - let the PF
answer and tell the VF it doesn't know the message.

Signed-off-by: Yuval Mintz <Yuval.Mintz@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoqed: PF enforce MAC limitation of VFs
Yuval Mintz [Sun, 5 Jun 2016 10:11:15 +0000 (13:11 +0300)]
qed: PF enforce MAC limitation of VFs

The only limitation relating to MACs the PF enforce today on its VFs
is in case it has a forced-unicast MAC address for them, in which case
they can't configure other unicast addresses.
Specifically, the PF isn't enforcing the number of MAC addresse a VF can
configure regardless of the nubmer of such filters agreed upon by PF and
VF during the acquisition process.

PF's shadow-config is now extended to also contain information about its
VFs' unicast addresses configuration, allowing such enforcement.

Signed-off-by: Yuval Mintz <Yuval.Mintz@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoqed: Move doorbell calculation from VF to PF
Yuval Mintz [Sun, 5 Jun 2016 10:11:14 +0000 (13:11 +0300)]
qed: Move doorbell calculation from VF to PF

Today, the VF is aware of its queues context-ids, and calculates the
doorbell address when opening its queues on its own.
The configuration of doorbells in HW can sometime in the future be changed
by the PF [hw has several configurable features that might affect doorbell
addresses, e.g., dpm support], this would break compatibility with older
VFs as their calculated doorbell addresses would be incorrect for such a
configuration.

In order to avoid such a backward compatibility failure, let the PF make
the calculation of the doorbell offset based on the context-id, and pass
that to the VF.

Signed-off-by: Yuval Mintz <Yuval.Mintz@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoqed: Make PF more robust against malicious VF
Yuval Mintz [Sun, 5 Jun 2016 10:11:13 +0000 (13:11 +0300)]
qed: Make PF more robust against malicious VF

There are several requests the VF can make toward the PF which the driver
would pass to firmware without checking the validity first - specifically,
opening queues and updating vports. Such configurations might cause the
firmware to assert.

This adds validation of the legality of said configurations on the PF side
before passing it onward via ramrod to firmware.

Signed-off-by: Yuval Mintz <Yuval.Mintz@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoqed: PF-VF resource negotiation
Yuval Mintz [Sun, 5 Jun 2016 10:11:12 +0000 (13:11 +0300)]
qed: PF-VF resource negotiation

One of the goals of the vf's first message to the PF [acquire]
is to learn about the number of resources available to it [macs, vlans,
etc.]. This is done via negotiation - the VF requires a set of resources,
which the PF either approves or disaproves and sends a smaller set of
resources as alternative. In this later case, the VF is then expected to
either abort the probe or re-send the acquire message with less
required resources.

While this infrastructure exists since the initial submision of qed
SRIOV support, it's in fact completely inoperational - PF isn't really
looking into the resources the VF has asked for and is never going to
reply to the VF that it lacks resources.

This patch addresses this flow, fixing it and allowing the PF and VF
to actually agree on a set of resources.

Signed-off-by: Yuval Mintz <Yuval.Mintz@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoqed: Relax VF firmware requirements
Yuval Mintz [Sun, 5 Jun 2016 10:11:11 +0000 (13:11 +0300)]
qed: Relax VF firmware requirements

Current driver require an exact match between VF and PF storm firmware;
Any difference would fail the VF acquire message, causing the VF probe
to be aborted.

While there's still dependencies between the two, the recent FW submission
has relaxed the match requirement - instead of an exact match, there's now
a 'fastpath' HSI major/minor scheme, where VFs and PFs that match in their
major number can co-exist even if their minor is different.

In order to accomadate this change some changes in the vf-start init flow
had to be made, as the VF start ramrod now has to be sent only after PF
learns which fastpath HSI its VF is requiring.

Signed-off-by: Yuval Mintz <Yuval.Mintz@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet: get rid of spin_trylock() in net_tx_action()
Eric Dumazet [Sun, 5 Jun 2016 03:02:28 +0000 (20:02 -0700)]
net: get rid of spin_trylock() in net_tx_action()

Note: Tom Herbert posted almost same patch 3 months back, but for
different reasons.

The reasons we want to get rid of this spin_trylock() are :

1) Under high qdisc pressure, the spin_trylock() has almost no
chance to succeed.

2) We loop multiple times in softirq handler, eventually reaching
the max retry count (10), and we schedule ksoftirqd.

Since we want to adhere more strictly to ksoftirqd being waked up in
the future (https://lwn.net/Articles/687617/), better avoid spurious
wakeups.

3) calls to __netif_reschedule() dirty the cache line containing
q->next_sched, slowing down the owner of qdisc.

4) RT kernels can not use the spin_trylock() here.

With help of busylock, we get the qdisc spinlock fast enough, and
the trylock trick brings only performance penalty.

Depending on qdisc setup, I observed a gain of up to 19 % in qdisc
performance (1016600 pps instead of 853400 pps, using prio+tbf+fq_codel)

("mpstat -I SCPU 1" is much happier now)

Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Tom Herbert <tom@herbertland.com>
Acked-by: Tom Herbert <tom@herbertland.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agovhost_net: stop polling socket during rx processing
Jason Wang [Wed, 1 Jun 2016 05:56:33 +0000 (01:56 -0400)]
vhost_net: stop polling socket during rx processing

We don't stop rx polling socket during rx processing, this will lead
unnecessary wakeups from under layer net devices (E.g
sock_def_readable() form tun). Rx will be slowed down in this
way. This patch avoids this by stop polling socket during rx
processing. A small drawback is that this introduces some overheads in
light load case because of the extra start/stop polling, but single
netperf TCP_RR does not notice any change. In a super heavy load case,
e.g using pktgen to inject packet to guest, we get about ~8.8%
improvement on pps:

before: ~1240000 pkt/s
after:  ~1350000 pkt/s

Signed-off-by: Jason Wang <jasowang@redhat.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet: ethernet: cavium: liquidio: request_manager: Remove create_workqueue
Bhaktipriya Shridhar [Sat, 4 Jun 2016 15:24:00 +0000 (20:54 +0530)]
net: ethernet: cavium: liquidio: request_manager: Remove create_workqueue

alloc_workqueue replaces deprecated create_workqueue().

A dedicated workqueue has been used since the workitem viz
(&db_wq->wk.work which maps to check_db_timeout) is involved
in normal device operation. WQ_MEM_RECLAIM has been set to guarantee
forward progress under memory pressure, which is a requirement here.
Since there are only a fixed number of work items, explicit concurrency
limit is unnecessary.

flush_workqueue is unnecessary since destroy_workqueue() itself calls
drain_workqueue() which flushes repeatedly till the workqueue
becomes empty.

Signed-off-by: Bhaktipriya Shridhar <bhaktipriya96@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet: ethernet: cavium: liquidio: response_manager: Remove create_workqueue
Bhaktipriya Shridhar [Sat, 4 Jun 2016 14:51:40 +0000 (20:21 +0530)]
net: ethernet: cavium: liquidio: response_manager: Remove create_workqueue

alloc_workqueue replaces deprecated create_workqueue().

A dedicated workqueue has been used since the workitem viz
(&cwq->wk.work which maps to oct_poll_req_completion) is involved
in normal device operation. WQ_MEM_RECLAIM has been set to guarantee
forward progress under memory pressure, which is a requirement here.
Since there are only a fixed number of work items, explicit concurrency
limit is unnecessary.

flush_workqueue is unnecessary since destroy_workqueue() itself calls
drain_workqueue() which flushes repeatedly till the workqueue
becomes empty. Hence the call to flush_workqueue() has been dropped.

Signed-off-by: Bhaktipriya Shridhar <bhaktipriya96@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agovirtio-net: Add initial MTU advice feature
Aaron Conole [Fri, 3 Jun 2016 20:57:12 +0000 (16:57 -0400)]
virtio-net: Add initial MTU advice feature

This commit adds the feature bit and associated mtu device entry for the
virtio network device.  When a virtio device comes up, it checks the
feature bit for the VIRTIO_NET_F_MTU feature.  If such feature bit is
enabled, the driver will read the advised MTU and use it as the initial
value.

Signed-off-by: Aaron Conole <aconole@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet: Revert vrf-local changes.
David S. Miller [Mon, 6 Jun 2016 22:58:34 +0000 (15:58 -0700)]
net: Revert vrf-local changes.

This reverts commit 2fb7ea455d57e22110c54fc2de0656b6f744263c.

It results in build errors because ip6_input is not a
symbol exported to modules.

Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoMerge branch 'vrf-local'
David S. Miller [Mon, 6 Jun 2016 22:19:07 +0000 (15:19 -0700)]
Merge branch 'vrf-local'

David Ahern says:

====================
net: vrf: Add support for local traffic to local addresses

Add support for locally originated traffic to VRF-local addresses,
be it addresses on enslaved devices or addresses on the VRF device:

$ ip addr show dev red
33: red: <NOARP,MASTER,UP,LOWER_UP> mtu 65536 qdisc pfifo_fast state UP group default qlen 1000
    link/ether be:00:53:b5:e4:25 brd ff:ff:ff:ff:ff:ff
    inet 1.1.1.1/32 scope global red
       valid_lft forever preferred_lft forever
    inet6 1111:1::1/128 scope global
       valid_lft forever preferred_lft forever

$ ip addr show dev eth1
3: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master red state UP group default qlen 1000
    link/ether 02:e0:f9:79:34:bd brd ff:ff:ff:ff:ff:ff
    inet 10.100.1.1/24 brd 10.100.1.255 scope global eth1
       valid_lft forever preferred_lft forever
    inet6 2100:1::1/120 scope global
       valid_lft forever preferred_lft forever
    inet6 fe80::e0:f9ff:fe79:34bd/64 scope link
       valid_lft forever preferred_lft forever

$ ping -c1 -I red 10.100.1.1
    ping: Warning: source address might be selected on device other than red.
    PING 10.100.1.1 (10.100.1.1) from 10.100.1.1 red: 56(84) bytes of data.
    64 bytes from 10.100.1.1: icmp_seq=1 ttl=64 time=0.057 ms

$ ping -c1 -I red 1.1.1.1
PING 1.1.1.1 (1.1.1.1) from 1.1.1.1 red: 56(84) bytes of data.
64 bytes from 1.1.1.1: icmp_seq=1 ttl=64 time=0.136 ms

--- 1.1.1.1 ping statistics ---
1 packets transmitted, 1 received, 0% packet loss, time 0ms
rtt min/avg/max/mdev = 0.136/0.136/0.136/0.000 ms

$ ping6 -c1 -I red  2100:1::1
ping6: Warning: source address might be selected on device other than red.
PING 2100:1::1(2100:1::1) from 2100:1::1 red: 56 data bytes
64 bytes from 2100:1::1: icmp_seq=1 ttl=64 time=0.167 ms

--- 2100:1::1 ping statistics ---
1 packets transmitted, 1 received, 0% packet loss, time 0ms
rtt min/avg/max/mdev = 0.167/0.167/0.167/0.000 ms

$ ping6 -c1 -I red 1111::1
PING 1111::1(1111::1) from 1111:1::1 red: 56 data bytes
64 bytes from 1111::1: icmp_seq=1 ttl=64 time=0.187 ms

--- 1111::1 ping statistics ---
1 packets transmitted, 1 received, 0% packet loss, time 0ms
rtt min/avg/max/mdev = 0.187/0.187/0.187/0.000 ms

This change also enables use of loopback address on the VRF device:
$ ip addr add dev red 127.0.0.1/8

$ ping -c1 -I red 127.0.0.1
PING 127.0.0.1 (127.0.0.1) from 127.0.0.1 red: 56(84) bytes of data.
64 bytes from 127.0.0.1: icmp_seq=1 ttl=64 time=0.058 ms
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet: vrf: ipv6 support for local traffic to local addresses
David Ahern [Thu, 2 Jun 2016 20:15:12 +0000 (13:15 -0700)]
net: vrf: ipv6 support for local traffic to local addresses

Add support for locally originated traffic to VRF-local IPv6 addresses.
Similar to IPv4 a local dst is set on the skb and the packet is
reinserted with a call to netif_rx. With this patch, ping, tcp and udp
packets to a local IPv6 address are successfully routed:

    $ ip addr show dev eth1
    4: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master red state UP group default qlen 1000
        link/ether 02:e0:f9:1c:b9:74 brd ff:ff:ff:ff:ff:ff
        inet 10.100.1.1/24 brd 10.100.1.255 scope global eth1
           valid_lft forever preferred_lft forever
        inet6 2100:1::1/120 scope global
           valid_lft forever preferred_lft forever
        inet6 fe80::e0:f9ff:fe1c:b974/64 scope link
           valid_lft forever preferred_lft forever

    $ ping6 -c1 -I red 2100:1::1
    ping6: Warning: source address might be selected on device other than red.
    PING 2100:1::1(2100:1::1) from 2100:1::1 red: 56 data bytes
    64 bytes from 2100:1::1: icmp_seq=1 ttl=64 time=0.098 ms

ip6_input is exported so the VRF driver can use it for the dst input
function. The dst_alloc function for IPv4 defaults to setting the input and
output functions; IPv6's does not. VRF does not need to duplicate the Rx path
so just export the ipv6 input function.

Signed-off-by: David Ahern <dsa@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet: vrf: ipv4 support for local traffic to local addresses
David Ahern [Thu, 2 Jun 2016 20:15:11 +0000 (13:15 -0700)]
net: vrf: ipv4 support for local traffic to local addresses

Add support for locally originated traffic to VRF-local addresses. If
destination device for an skb is the loopback or VRF device then set
its dst to a local version of the VRF cached dst_entry and call netif_rx
to insert the packet onto the rx queue - similar to what is done for
loopback. This patch handles IPv4 support; follow on patch handles IPv6.

With this patch, ping, tcp and udp packets to a local IPv4 address are
successfully routed:

    $ ip addr show dev eth1
    4: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master red state UP group default qlen 1000
        link/ether 02:e0:f9:1c:b9:74 brd ff:ff:ff:ff:ff:ff
        inet 10.100.1.1/24 brd 10.100.1.255 scope global eth1
           valid_lft forever preferred_lft forever
        inet6 2100:1::1/120 scope global
           valid_lft forever preferred_lft forever
        inet6 fe80::e0:f9ff:fe1c:b974/64 scope link
           valid_lft forever preferred_lft forever

    $ ping -c1 -I red 10.100.1.1
    ping: Warning: source address might be selected on device other than red.
    PING 10.100.1.1 (10.100.1.1) from 10.100.1.1 red: 56(84) bytes of data.
    64 bytes from 10.100.1.1: icmp_seq=1 ttl=64 time=0.057 ms

This patch also enables use of IPv4 loopback address on the VRF device:
    $ ip addr add dev red 127.0.0.1/8

    $ ping -c1 -I red 127.0.0.1
    PING 127.0.0.1 (127.0.0.1) from 127.0.0.1 red: 56(84) bytes of data.
    64 bytes from 127.0.0.1: icmp_seq=1 ttl=64 time=0.058 ms

Signed-off-by: David Ahern <dsa@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet: vrf: Minor refactoring for local address patches
David Ahern [Thu, 2 Jun 2016 20:15:10 +0000 (13:15 -0700)]
net: vrf: Minor refactoring for local address patches

Move the stripping of the ethernet header from is_ip_tx_frame into the
ipv4 and ipv6 outbound functions. If the packet is destined to a local
address the header is retained since the packet is sent back to netif_rx.

Collapse vrf_send_v4_prep into vrf_process_v4_outbound.

Signed-off-by: David Ahern <dsa@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoMerge branch 'hv_netvsc-cleanups'
David S. Miller [Mon, 6 Jun 2016 03:16:50 +0000 (23:16 -0400)]
Merge branch 'hv_netvsc-cleanups'

Vitaly Kuznetsov says:

====================
hv_netvsc: cleanup after untangling the pointer mess

Changes since v1:
- resend when net-next is open [David Miller]
- rebased to current net-next.

After we made traveling through our internal structures explicit it became
obvious that some functions take arguments they don't need just to do
redundant pointer travel and get to what they really need while their
callers already have the required information.

This is just a cleanup series with no functional changes intended. It
doesn't pretend to be complete, additional cleanup of other functions may
follow.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agohv_netvsc: pass struct net_device to rndis_filter_set_offload_params()
Vitaly Kuznetsov [Fri, 3 Jun 2016 15:51:02 +0000 (17:51 +0200)]
hv_netvsc: pass struct net_device to rndis_filter_set_offload_params()

The only caller rndis_filter_device_add() has 'struct net_device' pointer
already.

Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agohv_netvsc: pass struct net_device to rndis_filter_set_device_mac()
Vitaly Kuznetsov [Fri, 3 Jun 2016 15:51:01 +0000 (17:51 +0200)]
hv_netvsc: pass struct net_device to rndis_filter_set_device_mac()

We unpack 'struct net_device' in netvsc_set_mac_addr() to get to
'struct hv_device' pointer which we use in rndis_filter_set_device_mac()
to get back to 'struct net_device'.

Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agohv_netvsc: pass struct netvsc_device to rndis_filter_{open, close}()
Vitaly Kuznetsov [Fri, 3 Jun 2016 15:51:00 +0000 (17:51 +0200)]
hv_netvsc: pass struct netvsc_device to rndis_filter_{open, close}()

Both rndis_filter_open()/rndis_filter_close() use struct hv_device to
reach to struct netvsc_device only and all callers have it already.
While on it, rename net_device to nvdev in rndis_filter_open() as
net_device is misleading.

Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agohv_netvsc: introduce {net, hv}_device_to_netvsc_device() helpers
Vitaly Kuznetsov [Fri, 3 Jun 2016 15:50:59 +0000 (17:50 +0200)]
hv_netvsc: introduce {net, hv}_device_to_netvsc_device() helpers

Make it easier to get 'struct netvsc_device' from 'struct net_device' and
'struct hv_device' by introducing inline helpers.

Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agohv_netvsc: remove redundant assignment in netvsc_recv_callback()
Vitaly Kuznetsov [Fri, 3 Jun 2016 15:50:58 +0000 (17:50 +0200)]
hv_netvsc: remove redundant assignment in netvsc_recv_callback()

net_device_ctx is assigned in the very beginning of the function and 'net'
pointer doesn't change.

Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet: disable fragment reassembly if high_thresh is zero
Michal Kubeček [Fri, 27 May 2016 15:53:52 +0000 (17:53 +0200)]
net: disable fragment reassembly if high_thresh is zero

Before commit 6d7b857d541e ("net: use lib/percpu_counter API for
fragmentation mem accounting"), setting the reassembly high threshold
to 0 prevented fragment reassembly as first fragment would be always
evicted before second could be added to the queue. While inefficient,
some users apparently relied on this method.

Since the commit mentioned above, a percpu counter is used for
reassembly memory accounting and high batch size avoids taking slow path
in most common scenarios. As a result, a whole full sized packet can be
reassembled without the percpu counter's main counter changing its value
so that even with high_thresh set to 0, fragmented packets can be still
reassembled and processed.

Add explicit check preventing reassembly if high threshold is zero.

Signed-off-by: Michal Kubecek <mkubecek@suse.cz>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoMerge branch 'hns-acpi'
David S. Miller [Sun, 5 Jun 2016 01:32:46 +0000 (21:32 -0400)]
Merge branch 'hns-acpi'

Kejian Yan says:

====================
net: hns: add support of ACPI

This series adds HNS support of acpi. The routine will call some ACPI
helper functions, like acpi_dev_found() and acpi_evaluate_dsm(), which
are not included in other cases. In order to make system compile
successfully in other cases except ACPI, it needs to add relative stub
functions to linux/acpi.h. And we use device property functions instead
of serial helper functions to suport both DT and ACPI cases. And then
add the supports of ACPI for HNS.

change log:
 v3->v4:
  mii-id gets from dev-name instead of address

 v2->v3:
 1. add Review-by: Andy Shevchenko
 2. fix the potential memory leak

 v1 -> v2:
 1. use acpi_dev_found() instead of acpi_match_device_ids() to check if
it is a acpi node.
 2. use is_of_node() instead of IS_ENABLED() to check if it is a DT node.
 3. split the patch("add support of acpi for hns-mdio") into two patches:
    3.1 Move to use fwnode_handle
    3.2 Add ACPI
 4. add the patch which subject is dsaf misc operation method
 5. fix the comments by Andy Shevchenko
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet: hns: net: hns: enet adds support of acpi
Kejian Yan [Fri, 3 Jun 2016 02:55:21 +0000 (10:55 +0800)]
net: hns: net: hns: enet adds support of acpi

Enet needs to get configration parameter by acpi. This patch
adds support of ACPI for enet. The configuration parameter will
be configed in BIOS.

Signed-off-by: Kejian Yan <yankejian@huawei.com>
Signed-off-by: Yisen Zhuang <Yisen.Zhuang@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet: hns: implement the miscellaneous operation by asl
Kejian Yan [Fri, 3 Jun 2016 02:55:20 +0000 (10:55 +0800)]
net: hns: implement the miscellaneous operation by asl

The miscellaneous operation is implemented in BIOS, the kernel can call
_DSM method help to call the implementation in ACPI case. Here is a patch
to do that.

Signed-off-by: Kejian Yan <yankejian@huawei.com>
Signed-off-by: Yisen Zhuang <Yisen.Zhuang@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet: hns: register phy device in each mac initial sequence
Kejian Yan [Fri, 3 Jun 2016 02:55:19 +0000 (10:55 +0800)]
net: hns: register phy device in each mac initial sequence

In ACPI case, there is no interface to register phy device to mdio-bus.
Phy device has to be registered itself to mdio-bus, and then enet can
get the phy device's info so that it can config the phy-device to help
to trasmit and receive data.
HNS hardware topology is as below. The MDIO controller may control several
PHY-devices, and each PHY-device connects to a MAC device. PHY-devices
will register when each mac find PHY device in initial sequence.

                       cpu
                        |
                        |
     -------------------------------------------
    |                   |                       |
    |                   |                       |
    |                  dsaf                     |
   MDIO                 |                      MDIO
    |      ---------------------------          |
    |     |         |         |       |         |
    |     |         |         |       |         |
    |    MAC       MAC       MAC     MAC        |
    |     |         |         |       |         |
     ---- |-------- |-------- |       | --------
         ||        ||        ||       ||
         PHY       PHY       PHY     PHY

Signed-off-by: Kejian Yan <yankejian@huawei.com>
Signed-off-by: Yisen Zhuang <Yisen.Zhuang@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet: hns: dsaf adds support of acpi
Kejian Yan [Fri, 3 Jun 2016 02:55:18 +0000 (10:55 +0800)]
net: hns: dsaf adds support of acpi

Dsaf needs to get configuration parameter by ACPI, so this patch add
support of ACPI.

Signed-off-by: Kejian Yan <yankejian@huawei.com>
Signed-off-by: Yisen Zhuang <Yisen.Zhuang@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet: hns: add dsaf misc operation method
Kejian Yan [Fri, 3 Jun 2016 02:55:17 +0000 (10:55 +0800)]
net: hns: add dsaf misc operation method

The misc operation for different hw platform may be different, if using
current implementation, it will add a new branch on each function for
every new hw platform, so we add a method for this operation.

Signed-off-by: Kejian Yan <yankejian@huawei.com>
Signed-off-by: Yisen Zhuang <Yisen.Zhuang@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet: hns: add uniform interface for phy connection
Kejian Yan [Fri, 3 Jun 2016 02:55:16 +0000 (10:55 +0800)]
net: hns: add uniform interface for phy connection

As device_node is only used by DT case, HNS needs to treat the other
cases including ACPI. It needs to use uniform ways to handle both of
DT and ACPI. This patch chooses phy_device, and of_phy_connect and
of_phy_attach are only used by DT case. It needs to use uniform interface
to handle that sequence by both DT and ACPI.

Signed-off-by: Kejian Yan <yankejian@huawei.com>
Signed-off-by: Yisen Zhuang <Yisen.Zhuang@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet: hns: enet specify a reference to dsaf by fwnode_handle
Kejian Yan [Fri, 3 Jun 2016 02:55:15 +0000 (10:55 +0800)]
net: hns: enet specify a reference to dsaf by fwnode_handle

As device_node is only used by DT case, it is expected to find uniform
ways. So fwnode_handle is the suitable method.

Signed-off-by: Kejian Yan <yankejian@huawei.com>
Signed-off-by: Yisen Zhuang <Yisen.Zhuang@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet: hns: use platform_get_irq instead of irq_of_parse_and_map
Kejian Yan [Fri, 3 Jun 2016 02:55:14 +0000 (10:55 +0800)]
net: hns: use platform_get_irq instead of irq_of_parse_and_map

As irq_of_parse_and_map is only used by DT case, it is excepted to use
a uniform interface. So it is used platform_get_irq() instead.

Signed-off-by: Kejian Yan <yankejian@huawei.com>
Signed-off-by: Yisen Zhuang <Yisen.Zhuang@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet: hns: use device_* APIs instead of of_* APIs
Kejian Yan [Fri, 3 Jun 2016 02:55:13 +0000 (10:55 +0800)]
net: hns: use device_* APIs instead of of_* APIs

OF series functions can be used only for DT case. Use unified
device property function instead to support both DT and ACPI.

Signed-off-by: Kejian Yan <yankejian@huawei.com>
Signed-off-by: Yisen Zhuang <Yisen.Zhuang@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet: hisilicon: add support of acpi for hns-mdio
Kejian Yan [Fri, 3 Jun 2016 02:55:12 +0000 (10:55 +0800)]
net: hisilicon: add support of acpi for hns-mdio

hns-mdio needs to register itself to mii-bus. The info of the device can
be read by both DT and ACPI.
HNS tries to call Linux PHY driver to help access PHY-devices, the HNS
hardware topology is as below. The MDIO controller may control several
PHY-devices, and each PHY-device connects to a MAC device. The MDIO will
be registered to mdiobus, then PHY-devices will register when each mac
find PHY device.
                       cpu
                        |
                        |
     -------------------------------------------
    |                   |                       |
    |                   |                       |
    |                  dsaf                     |
   MDIO                 |                      MDIO
    |      ---------------------------          |
    |     |         |         |       |         |
    |     |         |         |       |         |
    |    MAC       MAC       MAC     MAC        |
    |     |         |         |       |         |
     ---- |-------- |-------- |       | --------
         ||        ||        ||       ||
         PHY       PHY       PHY     PHY

And the driver can handle reset sequence by _RST method in DSDT in ACPI
case.

Signed-off-by: Kejian Yan <yankejian@huawei.com>
Signed-off-by: Yisen Zhuang <Yisen.Zhuang@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet: hisilicon: cleanup to prepare for other cases
Kejian Yan [Fri, 3 Jun 2016 02:55:11 +0000 (10:55 +0800)]
net: hisilicon: cleanup to prepare for other cases

Hns-mdio only supports DT case now. do some cleanup to prepare
for introducing other cases later, no functional change.

Signed-off-by: Kejian Yan <yankejian@huawei.com>
Signed-off-by: Yisen Zhuang <Yisen.Zhuang@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoACPI: bus: add stub acpi_evaluate_dsm() to linux/acpi.h
Kejian Yan [Fri, 3 Jun 2016 02:55:10 +0000 (10:55 +0800)]
ACPI: bus: add stub acpi_evaluate_dsm() to linux/acpi.h

acpi_evaluate_dsm() will be used to handle the _DSM method in ACPI case.
It will be compiled in non-ACPI case, but the function is in acpi_bus.h
and acpi_bus.h can only be used in ACPI case, so this patch add the stub
function to linux/acpi.h to make compiled successfully in non-ACPI cases.

Cc: Rafael J. Wysocki <rjw@rjwysocki.net>
Signed-off-by: Kejian Yan <yankejian@huawei.com>
Signed-off-by: Yisen Zhuang <Yisen.Zhuang@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoACPI: bus: add stub acpi_dev_found() to linux/acpi.h
Kejian Yan [Fri, 3 Jun 2016 02:55:09 +0000 (10:55 +0800)]
ACPI: bus: add stub acpi_dev_found() to linux/acpi.h

acpi_dev_found() will be used to detect if a given ACPI device is in the
system. It will be compiled in non-ACPI case, but the function is in
acpi_bus.h and acpi_bus.h can only be used in ACPI case, so this patch add
the stub function to linux/acpi.h to make compiled successfully in
non-ACPI cases.

Cc: Rafael J. Wysocki <rjw@rjwysocki.net>
Signed-off-by: Kejian Yan <yankejian@huawei.com>
Signed-off-by: Yisen Zhuang <Yisen.Zhuang@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoMerge branch 'dsa-new-binding'
David S. Miller [Sat, 4 Jun 2016 21:29:55 +0000 (14:29 -0700)]
Merge branch 'dsa-new-binding'

Andrew Lunn says:

====================
New DSA bind, switches as devices

The interesting patches here are the last three. They implement a new
binding for DSA, which removes a few limitations of the current DSA
binding. In particular, it allows switches to be true Linux devices.
These devices can be on any type of bus, unlike the old DSA binding
which assumes MDIO. See the commit log for more details. The second to
last patch modifies an existing boards device tree to use the new
binding, giving a good example of how switches can be true MDIO
devices. The last patch documents the new binding.

Thanks go to Florian and Vivien for reviewing, testing and bug fixing
these patches.

Tested-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Tested-by: Florian Fainelli <f.fainelli@gmail.com>
Since V1:

* Add lots of reviewed-by's
* Fix rtable comment
* dsa2: Clear cpu port mask in dsa_cpu_port_unapply()
* dsa2: Only set dsa_port_mask when port successfully configured
* dsa: clear {dsa|cpu}_port_mask on destroy

Since RFC:

* Split the mv88e6xxx MDIO refactor into a rename patch and a refactor
  patch.
* Extend commit message with comment about wrong of_node_put()
* Fix destroy of cpu and dsa ports.
* Rename _DSA_TAG_LAST to DSA_TAG_LAST and add a comment.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet: dsa: Document new binding
Andrew Lunn [Sat, 4 Jun 2016 19:17:09 +0000 (21:17 +0200)]
net: dsa: Document new binding

Add the new binding to the documentation of the existing binding.
Mark the old binding as deprecated.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Reviewed-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoarm: dt: vf610-zii-devel-b: Make use of new DSA binding
Andrew Lunn [Sat, 4 Jun 2016 19:17:08 +0000 (21:17 +0200)]
arm: dt: vf610-zii-devel-b: Make use of new DSA binding

Hang the three switches of the three MDIO busses using the new DSA
binding. Also, make use of the mdio-bus and explicitly list the phys
on one device. This is not required, but good for testing.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet: dsa: Add new binding implementation
Andrew Lunn [Sat, 4 Jun 2016 19:17:07 +0000 (21:17 +0200)]
net: dsa: Add new binding implementation

The existing DSA binding has a number of limitations and problems. The
main problem is that it cannot represent a switch as a linux device,
hanging off some bus. It is limited to one CPU port. The DSA platform
device is artificial, and does not really represent hardware.

Implement a new binding which can be embedded into any type of node on
a bus to represent one switch device, and its links to other switches.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet: dsa: mv88e6xxx: Refactor MDIO so driver registers mdio bus
Andrew Lunn [Sat, 4 Jun 2016 19:17:06 +0000 (21:17 +0200)]
net: dsa: mv88e6xxx: Refactor MDIO so driver registers mdio bus

Have the switch driver register its own MDIO bus. This allows for an
mdio property in the device tree, with child nodes for phys, which
can be referenced via phandles, etc.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet: dsa: mv88e6xxx: Rename _phy_ to _mdio_
Andrew Lunn [Sat, 4 Jun 2016 19:17:05 +0000 (21:17 +0200)]
net: dsa: mv88e6xxx: Rename _phy_ to _mdio_

The switch implements a generic MDIO bus, which could host more than
PHYs. It is conventional to use _mdio_ or _mii_ in the function name,
so rename them. Also postfix make the historically first read/write
function with _direct, to help distinguish it from _indirect and _ppu.

While touching these functions, remove some of the _ prefixes, which
we are deprecating.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet: dsa: Make mdio bus optional
Andrew Lunn [Sat, 4 Jun 2016 19:17:04 +0000 (21:17 +0200)]
net: dsa: Make mdio bus optional

The switch may want to instantiate its own MDIO bus. Only do it
centrally if the switch has not already created one, and the read op
is implemented.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet: dsa: Refactor selection of tag ops into a function
Andrew Lunn [Sat, 4 Jun 2016 19:17:03 +0000 (21:17 +0200)]
net: dsa: Refactor selection of tag ops into a function

Replace the two switch statements with an array lookup, and store the
result in the dsa tree structure. The drivers no longer need to know
the selected tag protocol, so remove it from the dsa switch structure.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Reviewed-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet: dsa: mv88e6xxx: Only support EDSA tagging
Andrew Lunn [Sat, 4 Jun 2016 19:17:02 +0000 (21:17 +0200)]
net: dsa: mv88e6xxx: Only support EDSA tagging

The merged driver no longer offers the option to use DSA tagging. So
remove the code to setup the switch to do DSA tagging and hard code
the use of EDSA.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Reviewed-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>y
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet: dsa: Split up creating/destroying of DSA and CPU ports
Andrew Lunn [Sat, 4 Jun 2016 19:17:01 +0000 (21:17 +0200)]
net: dsa: Split up creating/destroying of DSA and CPU ports

Refactor the code to setup a single DSA/CPU port into a function of
its own, and export it, so it can be used by the new binding.

Similarly, refactor the destroy code into a function.  When destroying
the ports, don't put the of node. They should be released at the end
along with the normal ports.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Reviewed-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet: dsa: Copy the routing table into the switch structure
Andrew Lunn [Sat, 4 Jun 2016 19:17:00 +0000 (21:17 +0200)]
net: dsa: Copy the routing table into the switch structure

The new binding will not have a chip data structure, it will place the
routing directly into the switch structure. To enable backwards
compatibility, copy the routing from the chip data into the switch
structure.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Reviewed-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet: dsa: Remove dynamic allocate of routing table
Andrew Lunn [Sat, 4 Jun 2016 19:16:59 +0000 (21:16 +0200)]
net: dsa: Remove dynamic allocate of routing table

With a maximum of four switches, the size of the routing table is the
same as the pointer to it. Removing it makes the code simpler.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Reviewed-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet: dsa: Move port device node into port structure
Andrew Lunn [Sat, 4 Jun 2016 19:16:58 +0000 (21:16 +0200)]
net: dsa: Move port device node into port structure

Move the port device node structure into the port structure, from the
chip data. This information is needed in the next step of implementing
the new binding.

The chip data structure is used while parsing the whole old binding,
before the individual switch structures exist. With the new bindings,
this is reversed, the switches exist first, and the interconnections
between the switches is derived from the individual switch
bindings. Thus this chip data structure becomes unneeded.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
eviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Reviewed-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet: dsa: Add a ports structure and use it in the switch structure
Andrew Lunn [Sat, 4 Jun 2016 19:16:57 +0000 (21:16 +0200)]
net: dsa: Add a ports structure and use it in the switch structure

There are going to be more per-port members added to the switch
structure. So add a port structure and move the netdev into it.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Reviewed-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet: dsa: tag_{e}dsa.c: Remove dependency on platform data
Andrew Lunn [Sat, 4 Jun 2016 19:16:56 +0000 (21:16 +0200)]
net: dsa: tag_{e}dsa.c: Remove dependency on platform data

The platform data nr_chips is used when validating a received packet,
to ensure it comes from a know switch chip. The number of possible
switches is limited to DSA_MAX_SWITCHES, so use this as the first
validation step. The new binding allows holes in the dst->ds[] array,
so also ensure ensure there is a valid dsa_switch for this packet.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Reviewed-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet: dsa: slave: Remove MDIO address from switch MDIO bus name
Andrew Lunn [Sat, 4 Jun 2016 19:16:55 +0000 (21:16 +0200)]
net: dsa: slave: Remove MDIO address from switch MDIO bus name

The DSA layer should no longer assume the switch is connected to an
MDIO bus. As a result, we cannot use the address on the MDIO bus when
forming the name of the switches internal MDIO bus for its builtin and
possibly external PHYs. The switch index is sufficient to make the
name unique, so drop the MDIO address.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Reviewed-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet: dsa: mv88e6xxx: fix circular lock in PPU work
Vivien Didelot [Sat, 4 Jun 2016 19:16:54 +0000 (21:16 +0200)]
net: dsa: mv88e6xxx: fix circular lock in PPU work

Lock debugging shows that there is a possible circular lock in the PPU
work code. Switch the lock order of smi_mutex and ppu_mutex to fix this.

Here's the full trace:

    [    4.341325] ======================================================
    [    4.347519] [ INFO: possible circular locking dependency detected ]
    [    4.353800] 4.6.0 #4 Not tainted
    [    4.357039] -------------------------------------------------------
    [    4.363315] kworker/0:1/328 is trying to acquire lock:
    [    4.368463]  (&ps->smi_mutex){+.+.+.}, at: [<8049c758>] mv88e6xxx_reg_read+0x30/0x54
    [    4.376313]
    [    4.376313] but task is already holding lock:
    [    4.382160]  (&ps->ppu_mutex){+.+...}, at: [<8049cac0>] mv88e6xxx_ppu_reenable_work+0x28/0xd4
    [    4.390772]
    [    4.390772] which lock already depends on the new lock.
    [    4.390772]
    [    4.398963]
    [    4.398963] the existing dependency chain (in reverse order) is:
    [    4.406461]
    [    4.406461] -> #1 (&ps->ppu_mutex){+.+...}:
    [    4.410897]        [<806d86bc>] mutex_lock_nested+0x54/0x360
    [    4.416606]        [<8049a800>] mv88e6xxx_ppu_access_get+0x28/0x100
    [    4.422906]        [<8049b778>] mv88e6xxx_phy_read+0x90/0xdc
    [    4.428599]        [<806a4534>] dsa_slave_phy_read+0x3c/0x40
    [    4.434300]        [<804943ec>] mdiobus_read+0x68/0x80
    [    4.439481]        [<804939d4>] get_phy_device+0x58/0x1d8
    [    4.444914]        [<80493ed0>] mdiobus_scan+0x24/0xf4
    [    4.450078]        [<8049409c>] __mdiobus_register+0xfc/0x1ac
    [    4.455857]        [<806a40b0>] dsa_probe+0x860/0xca8
    [    4.460934]        [<8043246c>] platform_drv_probe+0x5c/0xc0
    [    4.466627]        [<804305a0>] driver_probe_device+0x118/0x450
    [    4.472589]        [<80430b00>] __device_attach_driver+0xac/0x128
    [    4.478724]        [<8042e350>] bus_for_each_drv+0x74/0xa8
    [    4.484235]        [<804302d8>] __device_attach+0xc4/0x154
    [    4.489755]        [<80430cec>] device_initial_probe+0x1c/0x20
    [    4.495612]        [<8042f620>] bus_probe_device+0x98/0xa0
    [    4.501123]        [<8042fbd0>] deferred_probe_work_func+0x4c/0xd4
    [    4.507328]        [<8013a794>] process_one_work+0x1a8/0x604
    [    4.513030]        [<8013ac54>] worker_thread+0x64/0x528
    [    4.518367]        [<801409e8>] kthread+0xec/0x100
    [    4.523201]        [<80108f30>] ret_from_fork+0x14/0x24
    [    4.528462]
    [    4.528462] -> #0 (&ps->smi_mutex){+.+.+.}:
    [    4.532895]        [<8015ad5c>] lock_acquire+0xb4/0x1dc
    [    4.538154]        [<806d86bc>] mutex_lock_nested+0x54/0x360
    [    4.543856]        [<8049c758>] mv88e6xxx_reg_read+0x30/0x54
    [    4.549549]        [<8049cad8>] mv88e6xxx_ppu_reenable_work+0x40/0xd4
    [    4.556022]        [<8013a794>] process_one_work+0x1a8/0x604
    [    4.561707]        [<8013ac54>] worker_thread+0x64/0x528
    [    4.567053]        [<801409e8>] kthread+0xec/0x100
    [    4.571878]        [<80108f30>] ret_from_fork+0x14/0x24
    [    4.577139]
    [    4.577139] other info that might help us debug this:
    [    4.577139]
    [    4.585159]  Possible unsafe locking scenario:
    [    4.585159]
    [    4.591093]        CPU0                    CPU1
    [    4.595631]        ----                    ----
    [    4.600169]   lock(&ps->ppu_mutex);
    [    4.603693]                                lock(&ps->smi_mutex);
    [    4.609742]                                lock(&ps->ppu_mutex);
    [    4.615790]   lock(&ps->smi_mutex);
    [    4.619314]
    [    4.619314]  *** DEADLOCK ***
    [    4.619314]
    [    4.625256] 3 locks held by kworker/0:1/328:
    [    4.629537]  #0:  ("events"){.+.+..}, at: [<8013a704>] process_one_work+0x118/0x604
    [    4.637288]  #1:  ((&ps->ppu_work)){+.+...}, at: [<8013a704>] process_one_work+0x118/0x604
    [    4.645653]  #2:  (&ps->ppu_mutex){+.+...}, at: [<8049cac0>] mv88e6xxx_ppu_reenable_work+0x28/0xd4
    [    4.654714]
    [    4.654714] stack backtrace:
    [    4.659098] CPU: 0 PID: 328 Comm: kworker/0:1 Not tainted 4.6.0 #4
    [    4.665286] Hardware name: Freescale Vybrid VF5xx/VF6xx (Device Tree)
    [    4.671748] Workqueue: events mv88e6xxx_ppu_reenable_work
    [    4.677174] Backtrace:
    [    4.679674] [<8010d354>] (dump_backtrace) from [<8010d5a0>] (show_stack+0x20/0x24)
    [    4.687252]  r6:80fb3c88 r5:80fb3c88 r4:80fb4728 r3:00000002
    [    4.693003] [<8010d580>] (show_stack) from [<803b45e8>] (dump_stack+0x24/0x28)
    [    4.700246] [<803b45c4>] (dump_stack) from [<80157398>] (print_circular_bug+0x208/0x32c)
    [    4.708361] [<80157190>] (print_circular_bug) from [<8015a630>] (__lock_acquire+0x185c/0x1b80)
    [    4.716982]  r10:9ec22a00 r9:00000060 r8:8164b6bc r7:00000040 r6:00000003 r5:8163a5b4
    [    4.724905]  r4:00000003 r3:9ec22de8
    [    4.728537] [<80158dd4>] (__lock_acquire) from [<8015ad5c>] (lock_acquire+0xb4/0x1dc)
    [    4.736378]  r10:60000013 r9:00000000 r8:00000000 r7:00000000 r6:9e5e9c50 r5:80e618e0
    [    4.744301]  r4:00000000
    [    4.746879] [<8015aca8>] (lock_acquire) from [<806d86bc>] (mutex_lock_nested+0x54/0x360)
    [    4.754976]  r10:9e5e9c1c r9:80e616c4 r8:9f685ea0 r7:0000001b r6:9ec22a00 r5:8163a5b4
    [    4.762899]  r4:9e5e9c1c
    [    4.765477] [<806d8668>] (mutex_lock_nested) from [<8049c758>] (mv88e6xxx_reg_read+0x30/0x54)
    [    4.774008]  r10:80e60c5b r9:80e616c4 r8:9f685ea0 r7:0000001b r6:00000004 r5:9e5e9c10
    [    4.781930]  r4:9e5e9c1c
    [    4.784507] [<8049c728>] (mv88e6xxx_reg_read) from [<8049cad8>] (mv88e6xxx_ppu_reenable_work+0x40/0xd4)
    [    4.793907]  r7:9ffd5400 r6:9e5e9c68 r5:9e5e9cb0 r4:9e5e9c10
    [    4.799659] [<8049ca98>] (mv88e6xxx_ppu_reenable_work) from [<8013a794>] (process_one_work+0x1a8/0x604)
    [    4.809059]  r9:80e616c4 r8:9f685ea0 r7:9ffd5400 r6:80e0a1c8 r5:9f5f2e80 r4:9e5e9cb0
    [    4.816910] [<8013a5ec>] (process_one_work) from [<8013ac54>] (worker_thread+0x64/0x528)
    [    4.825010]  r10:9f5f2e80 r9:00000008 r8:80e0dc80 r7:80e0a1fc r6:80e0a1c8 r5:9f5f2e98
    [    4.832933]  r4:80e0a1c8
    [    4.835510] [<8013abf0>] (worker_thread) from [<801409e8>] (kthread+0xec/0x100)
    [    4.842827]  r10:00000000 r9:00000000 r8:00000000 r7:8013abf0 r6:9f5f2e80 r5:9ec15740
    [    4.850749]  r4:00000000
    [    4.853327] [<801408fc>] (kthread) from [<80108f30>] (ret_from_fork+0x14/0x24)
    [    4.860557]  r7:00000000 r6:00000000 r5:801408fc r4:9ec15740

Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Reviewed-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet: dsa: slave: chip data is optional, don't dereference NULL
Andrew Lunn [Sat, 4 Jun 2016 19:16:52 +0000 (21:16 +0200)]
net: dsa: slave: chip data is optional, don't dereference NULL

The new binding does not make use of dsa_chip_data, a.k.a cd.  When
retrieving the size of the EEPROM attached to a switch, don't assume
there is a cd attached to the switch structure.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Reviewed-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet: Add docbook description for 'mtu' arg to skb_gso_validate_mtu()
David S. Miller [Sat, 4 Jun 2016 05:56:28 +0000 (22:56 -0700)]
net: Add docbook description for 'mtu' arg to skb_gso_validate_mtu()

Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agosctp: Fix warning in sctp_packet_transmit_chunk()
David S. Miller [Sat, 4 Jun 2016 05:53:26 +0000 (22:53 -0700)]
sctp: Fix warning in sctp_packet_transmit_chunk()

size_t objects should be printed with %Z printf format.

Reported-by: kbuild test robot <fengguang.wu@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoqed: Fix next-ptr chains for BE / 32-bit
Yuval Mintz [Sat, 4 Jun 2016 05:20:16 +0000 (08:20 +0300)]
qed: Fix next-ptr chains for BE / 32-bit

Commit a91eb52abb50 ("qed: Revisit chain implementation") contains an
incorrect implementation for BE platforms, as device's regpairs containing
addresses are LE and they're not converted correctly when read back.
In addition, it raises a compilation warning for 32-bit platforms where
dma_addr_t is a 32-bit variable.

Reported-by: kbuild test robot <fengguang.wu@intel.com>
Signed-off-by: Yuval Mintz <Yuval.Mintz@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoMerge branch 'qed-roce-iscsi'
David S. Miller [Sat, 4 Jun 2016 00:08:45 +0000 (20:08 -0400)]
Merge branch 'qed-roce-iscsi'

Yuval Mintz says:

====================
qed: RocE & iSCSI infrastructure

We plan on sending 2 new protocol drivers in the imminent future -
both our RoCE [qedr] and iSCSI [qedi] drivers. As both submissions
would be rather massive and in order to avoid collisions between them,
the common infrastructure on the qed side was prepared as an independent
patch-series to be sent ahead of those 2 submissions.

This patch series introduces in QED 2 new 'ids' - one for iscsi and
one for roce. It then goes and adds logic required for configuring
said protocols in HW. Notice it *doesn't* actually add any client using
said ids, but rather only the infrastructure to allow their later usage.

What this patch doesn't contain is the slowpath protocol-configuration
toward the firmware. I.e., it contains register-setting logic, memory
allocations, etc., but not actual flow-related configuration specific
to the protocl. Those would be sent as part of the protocol driver
submissions.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoqed: Initialize hardware for new protocols
Yuval Mintz [Fri, 3 Jun 2016 11:35:35 +0000 (14:35 +0300)]
qed: Initialize hardware for new protocols

RoCE and iSCSI would require some added/changed hw configuration in order
to properly run; The biggest single change being the requirement of
allocating and mapping host memory for several HW blocks that aren't being
used by qede [SRC, QM, TM, etc.].

In addition, whereas qede is only using context memory for HW blocks, the
new protocol would also require task memories to be added.

Signed-off-by: Yuval Mintz <Yuval.Mintz@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoqed: Add iscsi/rdma personalities
Yuval Mintz [Fri, 3 Jun 2016 11:35:34 +0000 (14:35 +0300)]
qed: Add iscsi/rdma personalities

This patch adds in the ecore 2 new personalities in addition to
QED_PCI_ETH - QED_PCI_ISCSI and QED_PCI_ETH_ROCE.

Signed-off-by: Yuval Mintz <Yuval.Mintz@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoqed: Add common HSI for new protocols
Yuval Mintz [Fri, 3 Jun 2016 11:35:33 +0000 (14:35 +0300)]
qed: Add common HSI for new protocols

This adds the qed portion of the RoCE & iSCSI firmware HSI,
as well as adding several new common HSI files which would be required
by both qed and qed* protocols.

Signed-off-by: Yuval Mintz <Yuval.Mintz@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoqed: Revisit chain implementation
Yuval Mintz [Fri, 3 Jun 2016 11:35:32 +0000 (14:35 +0300)]
qed: Revisit chain implementation

RoCE driver is going to need a 32-bit chain [current chain implementation
for qed* currently supports only 16-bit producer/consumer chains].

This patch adds said support, as well as doing other slight tweaks and
modifications to qed's chain API.

Signed-off-by: Yuval Mintz <Yuval.Mintz@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet: ethernet: ti: cpsw: remove unused priv lock
Ivan Khoronzhuk [Thu, 2 Jun 2016 22:37:08 +0000 (01:37 +0300)]
net: ethernet: ti: cpsw: remove unused priv lock

There is no reason in this lock. At least for now.

Signed-off-by: Ivan Khoronzhuk <ivan.khoronzhuk@linaro.org>
Reviewed-by: Grygorii Strashko <grygorii.strashko@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agorxrpc: Use pr_<level> and pr_fmt, reduce object size a few KB
Joe Perches [Thu, 2 Jun 2016 19:08:52 +0000 (12:08 -0700)]
rxrpc: Use pr_<level> and pr_fmt, reduce object size a few KB

Use the more common kernel logging style and reduce object size.

The logging message prefix changes from a mixture of
"RxRPC:" and "RXRPC:" to "af_rxrpc: ".

$ size net/rxrpc/built-in.o*
   text    data     bss     dec     hex filename
  64172    1972    8304   74448   122d0 net/rxrpc/built-in.o.new
  67512    1972    8304   77788   12fdc net/rxrpc/built-in.o.old

Miscellanea:

o Consolidate the ASSERT macros to use a single pr_err call with
  decimal and hexadecimal output and a stringified #OP argument

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agohv_netvsc: Fix VF register on vlan devices
Haiyang Zhang [Thu, 2 Jun 2016 19:02:04 +0000 (12:02 -0700)]
hv_netvsc: Fix VF register on vlan devices

Added a condition to avoid vlan devices with same MAC registering
as VF.

Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
Reviewed-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoMerge branch 'sctp-gso'
David S. Miller [Fri, 3 Jun 2016 23:37:26 +0000 (19:37 -0400)]
Merge branch 'sctp-gso'

Marcelo Ricardo Leitner says:

====================
sctp: Add GSO support

This patchset adds sctp GSO support.

Performance tests indicates that increases throughput by 10% if using
bigger chunk sizes, specially if bigger than MTU. For small chunks, it
doesn't help much if not using heavy firewall rules.

For small chunks it will probably be of more use once we get something
like MSG_MORE as David Laight had suggested.

overall changes:
v1->v2:
Added support for receiving GSO frames on SCTP stack, as requested by
Dave Miller.

v2->v3:
Consider sctphdr size in skb_gso_transport_seglen()
rebased due to 5c7cdf339af5 ("gso: Remove arbitrary checks for
unsupported GSO")
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agosctp: improve debug message to also log curr pkt and new chunk size
Marcelo Ricardo Leitner [Thu, 2 Jun 2016 18:05:44 +0000 (15:05 -0300)]
sctp: improve debug message to also log curr pkt and new chunk size

This is useful for debugging packet sizes.

Signed-off-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Tested-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agosctp: Add GSO support
Marcelo Ricardo Leitner [Thu, 2 Jun 2016 18:05:43 +0000 (15:05 -0300)]
sctp: Add GSO support

SCTP has this pecualiarity that its packets cannot be just segmented to
(P)MTU. Its chunks must be contained in IP segments, padding respected.
So we can't just generate a big skb, set gso_size to the fragmentation
point and deliver it to IP layer.

This patch takes a different approach. SCTP will now build a skb as it
would be if it was received using GRO. That is, there will be a cover
skb with protocol headers and children ones containing the actual
segments, already segmented to a way that respects SCTP RFCs.

With that, we can tell skb_segment() to just split based on frag_list,
trusting its sizes are already in accordance.

This way SCTP can benefit from GSO and instead of passing several
packets through the stack, it can pass a single large packet.

v2:
- Added support for receiving GSO frames, as requested by Dave Miller.
- Clear skb->cb if packet is GSO (otherwise it's not used by SCTP)
- Added heuristics similar to what we have in TCP for not generating
  single GSO packets that fills cwnd.
v3:
- consider sctphdr size in skb_gso_transport_seglen()
- rebased due to 5c7cdf339af5 ("gso: Remove arbitrary checks for
  unsupported GSO")

Signed-off-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Tested-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agosctp: delay as much as possible skb_linearize
Marcelo Ricardo Leitner [Thu, 2 Jun 2016 18:05:42 +0000 (15:05 -0300)]
sctp: delay as much as possible skb_linearize

This patch is a preparation for the GSO one. In order to successfully
handle GSO packets on rx path we must not call skb_linearize, otherwise
it defeats any gain GSO may have had.

This patch thus delays as much as possible the call to skb_linearize,
leaving it to sctp_inq_pop() moment. For that the sanity checks
performed now know how to deal with fragments.

One positive side-effect of this is that if the socket is backlogged it
will have the chance of doing it on backlog processing instead of
during softirq.

With this move, it's evident that a check for non-linearity in
sctp_inq_pop was ineffective and is now removed. Note that a similar
check is performed a bit below this one.

Signed-off-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Tested-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoskbuff: introduce skb_gso_validate_mtu
Marcelo Ricardo Leitner [Thu, 2 Jun 2016 18:05:41 +0000 (15:05 -0300)]
skbuff: introduce skb_gso_validate_mtu

skb_gso_network_seglen is not enough for checking fragment sizes if
skb is using GSO_BY_FRAGS as we have to check frag per frag.

This patch introduces skb_gso_validate_mtu, based on the former, which
will wrap the use case inside it as all calls to skb_gso_network_seglen
were to validate if it fits on a given TMU, and improve the check.

Signed-off-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Tested-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agosk_buff: allow segmenting based on frag sizes
Marcelo Ricardo Leitner [Thu, 2 Jun 2016 18:05:40 +0000 (15:05 -0300)]
sk_buff: allow segmenting based on frag sizes

This patch allows segmenting a skb based on its frags sizes instead of
based on a fixed value.

Signed-off-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Tested-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoskbuff: export skb_gro_receive
Marcelo Ricardo Leitner [Thu, 2 Jun 2016 18:05:39 +0000 (15:05 -0300)]
skbuff: export skb_gro_receive

sctp GSO requires it and sctp can be compiled as a module, so we need to
export this function.

Signed-off-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Tested-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoloopback: make use of NETIF_F_GSO_SOFTWARE
Marcelo Ricardo Leitner [Thu, 2 Jun 2016 18:05:38 +0000 (15:05 -0300)]
loopback: make use of NETIF_F_GSO_SOFTWARE

NETIF_F_GSO_SOFTWARE was defined to list all GSO software types, so lets
make use of it in loopback code. Note that veth/vxlan/others already
uses it.

Within this patch series, this patch causes lo to pick up SCTP GSO feature
automatically (as it's added to NETIF_F_GSO_SOFTWARE) and thus avoiding
segmentation if possible.

Signed-off-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Tested-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet: fjes: fjes_main: Remove create_workqueue
Bhaktipriya Shridhar [Thu, 2 Jun 2016 09:30:57 +0000 (15:00 +0530)]
net: fjes: fjes_main: Remove create_workqueue

alloc_workqueue replaces deprecated create_workqueue().

The workqueue adapter->txrx_wq has workitem
&adapter->raise_intr_rxdata_task per adapter. Extended Socket Network
Device is shared memory based, so someone's transmission denotes other's
reception.  raise_intr_rxdata_task raises interruption of receivers from
the sender in order to notify receivers.

The workqueue adapter->control_wq has workitem
&adapter->interrupt_watch_task per adapter. interrupt_watch_task is used
to prevent delay of interrupts.

Dedicated workqueues have been used in both cases since the workitems
on the workqueues are involved in normal device operation and require
forward progress under memory pressure.

max_active has been set to 0 since there is no need for throttling
the number of active work items.

Since network devices  may be used for memory reclaim,
WQ_MEM_RECLAIM has been set to guarantee forward progress.

Signed-off-by: Bhaktipriya Shridhar <bhaktipriya96@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoqed: Utilize FW 8.10.3.0
Yuval Mintz [Thu, 2 Jun 2016 07:23:29 +0000 (10:23 +0300)]
qed: Utilize FW 8.10.3.0

The New QED firmware contains several fixes, including:
  - Wrong classification of packets in 4-port devices.
  - Anti-spoof interoperability with encapsulated packets.
  - Tx-switching of encapsulated packets.
It also slightly improves Tx performance of the device.

In addition, this firmware contains the necessary logic for
supporting iscsi & rdma, for which we plan on pushing protocol
drivers in the imminent future.

Signed-off-by: Yuval Mintz <Yuval.Mintz@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet: vrf: set operstate and mtu at link create
David Ahern [Thu, 2 Jun 2016 04:16:39 +0000 (21:16 -0700)]
net: vrf: set operstate and mtu at link create

The VRF device exists to define L3 domains and guide FIB lookups. As
such its operstate is not relevant. Seeing 'state UNKNOWN' in the
output of 'ip link show' can be confusing, so set operstate at link
create.

Similarly, the MTU for a VRF device is not used; any fragmentation
of the payload is done on the output path based on the real egress
device. An MTU of 1500 on the VRF device while enslaved devices
have a higher MTU can lead to confusion. Since the VRF MTU is not
relevant set to 64k similar to what is done for loopback.

Signed-off-by: David Ahern <dsa@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoovs: set name assign type of internal port
Zhang Shengju [Tue, 31 May 2016 13:41:02 +0000 (13:41 +0000)]
ovs: set name assign type of internal port

Set name_assign_type of internal port to NET_NAME_USER.

Signed-off-by: Zhang Shengju <zhangshengju@cmss.chinamobile.com>
Acked-by: Pravin B Shelar <pshelar@ovn.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet: ethernet: wiznet: Remove create_workqueue
Bhaktipriya Shridhar [Wed, 1 Jun 2016 17:59:15 +0000 (23:29 +0530)]
net: ethernet: wiznet: Remove create_workqueue

alloc_workqueue replaces deprecated create_workqueue().

A dedicated workqueue has been used since the workitems are involved
in normal device operation. Workitems &priv->rx_work and &priv->tx_work,
map to w5100_rx_work and w5100_tx_work respectively and are involved in
receiving and transmitting packets. Forward progress under
memory pressure is a requirement here.

create_workqueue has been replaced with alloc_workqueue with max_active
as 0 since there is no need for throttling the number of active work
items.

Since the driver may be used in memory reclaim path,
WQ_MEM_RECLAIM has been set to guarantee forward progress.

flush_workqueue is unnecessary since destroy_workqueue() itself calls
drain_workqueue() which flushes repeatedly till the workqueue
becomes empty. Hence the call to flush_workqueue() has been dropped.

Signed-off-by: Bhaktipriya Shridhar <bhaktipriya96@gmail.com>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoravb: Remove manual pause frame transmit
Masaru Nagai [Wed, 1 Jun 2016 16:41:05 +0000 (01:41 +0900)]
ravb: Remove manual pause frame transmit

Writing a non-zero value to the manual PAUSE frame register (MPR) starts
the transmission of a PAUSE frame.
A PAUSE frame is sent in ravb_emac_init(), but it is not expected behavior.

Signed-off-by: Masaru Nagai <masaru.nagai.vx@renesas.com>
Signed-off-by: Kazuya Mizuguchi <kazuya.mizuguchi.ks@renesas.com>
Signed-off-by: Yoshihiro Kaneko <ykaneko0929@gmail.com>
Acked-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agostmmac: make platform drivers depend on their associated SoC
Peter Robinson [Wed, 1 Jun 2016 12:28:58 +0000 (13:28 +0100)]
stmmac: make platform drivers depend on their associated SoC

There's not much point, except compile test, enabling the stmmac
platform drivers unless their actual SoC is enabled. They're not
useful without it.

Signed-off-by: Peter Robinson <pbrobinson@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoMerge branch 'macvlan-less-mcast-cloning'
David S. Miller [Thu, 2 Jun 2016 00:48:46 +0000 (17:48 -0700)]
Merge branch 'macvlan-less-mcast-cloning'

Herbert Xu says:

====================
macvlan: Avoid unnecessary multicast cloning

This patch tries to improve macvlan multicast performance by
maintaining a filter hash at the macvlan_port level so that we
can quickly determine whether a given packet is needed or not.

It is preceded by a patch that fixes a potential use-after-free
bug that I discovered while looking over this.

v2 fixed a bug where promiscuous/allmulti settings weren't handled
correctly.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agomacvlan: Avoid unnecessary multicast cloning
Herbert Xu [Wed, 1 Jun 2016 03:45:44 +0000 (11:45 +0800)]
macvlan: Avoid unnecessary multicast cloning

Currently we always queue a multicast packet for further processing,
even if none of the macvlan devices are subscribed to the address.

This patch optimises this by adding a global multicast filter for
a macvlan_port.

Note that this patch doesn't handle the broadcast addresses of the
individual macvlan devices correctly, if they are not all identical
to vlan->lowerdev.  However, this is already broken because there
is no mechanism in place to update the individual multicast filters
when you change the broadcast address.

If someone cares enough they should fix this by collecting all
broadcast addresses for a macvlan as we do for multicast and unicast.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agomacvlan: Fix potential use-after free for broadcasts
Herbert Xu [Wed, 1 Jun 2016 03:43:00 +0000 (11:43 +0800)]
macvlan: Fix potential use-after free for broadcasts

When we postpone a broadcast packet we save the source port in
the skb if it is local.  However, the source port can disappear
before we get a chance to process the packet.

This patch fixes this by holding a ref count on the netdev.

It also delays the skb->cb modification until after we allocate
the new skb as you should not modify shared skbs.

Fixes: 412ca1550cbe ("macvlan: Move broadcasts into a work queue")
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoudp: avoid csum_partial() for validated skb
Eric Dumazet [Tue, 31 May 2016 22:22:41 +0000 (15:22 -0700)]
udp: avoid csum_partial() for validated skb

In commit e6afc8ace6dd5 ("udp: remove headers from UDP packets before
queueing"), udp_csum_pull_header() helper was added but missed fact
that CHECKSUM_UNNECESSARY packets were now converted to CHECKSUM_NONE
and skb->csum_valid was set to 1 for them.

Since csum_partial() is quite expensive, even for 8-byte area, it is
worth adding a test.

We also can use skb->data instead of udp_hdr() as we are pulling
UDP headers, as it is sightly faster.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoravb: Add SET_RUNTIME_PM_OPS macro
Kazuya Mizuguchi [Sun, 29 May 2016 20:25:43 +0000 (05:25 +0900)]
ravb: Add SET_RUNTIME_PM_OPS macro

Use SET_RUNTIME_PM_OPS macro instead of assigning a member of
dev_pm_ops directly.

Signed-off-by: Kazuya Mizuguchi <kazuya.mizuguchi.ks@renesas.com>
Signed-off-by: Yoshihiro Kaneko <ykaneko0929@gmail.com>
Acked-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoravb: Add ESF in RCR for enabling separation filter
Masaru Nagai [Tue, 31 May 2016 18:01:28 +0000 (03:01 +0900)]
ravb: Add ESF in RCR for enabling separation filter

The H/W manual recommends B'10 or B'11 in a value of the separation
filtering select bits in the receive configuration register (RCR.ESF).
When B'10 is set, frames from non-matching streams are discarded.
When B'11 is set, frames from non-matching streams are processed in
reception queue 0 (best effort).
This patch sets B'11 in ESF.

[ykaneko0929@gmail.com: revised this commit message]
Signed-off-by: Masaru Nagai <masaru.nagai.vx@renesas.com>
Signed-off-by: Kazuya Mizuguchi <kazuya.mizuguchi.ks@renesas.com>
Signed-off-by: Yoshihiro Kaneko <ykaneko0929@gmail.com>
Acked-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Linus Torvalds [Wed, 1 Jun 2016 05:28:28 +0000 (22:28 -0700)]
Merge git://git./linux/kernel/git/davem/net

Pull networking fixes from David Miller:

 1) Fix negative error code usage in ATM layer, from Stefan Hajnoczi.

 2) If CONFIG_SYSCTL is disabled, the default TTL is not initialized
    properly.  From Ezequiel Garcia.

 3) Missing spinlock init in mvneta driver, from Gregory CLEMENT.

 4) Missing unlocks in hwmb error paths, also from Gregory CLEMENT.

 5) Fix deadlock on team->lock when propagating features, from Ivan
    Vecera.

 6) Work around buffer offset hw bug in alx chips, from Feng Tang.

 7) Fix double listing of SCTP entries in sctp_diag dumps, from Xin
    Long.

 8) Various statistics bug fixes in mlx4 from Eric Dumazet.

 9) Fix some randconfig build errors wrt fou ipv6 from Arnd Bergmann.

10) All of l2tp was namespace aware, but the ipv6 support code was not
    doing so.  From Shmulik Ladkani.

11) Handle on-stack hrtimers properly in pktgen, from Guenter Roeck.

12) Propagate MAC changes properly through VLAN devices, from Mike
    Manning.

13) Fix memory leak in bnx2x_init_one(), from Vitaly Kuznetsov.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (62 commits)
  sfc: Track RPS flow IDs per channel instead of per function
  usbnet: smsc95xx: fix link detection for disabled autonegotiation
  virtio_net: fix virtnet_open and virtnet_probe competing for try_fill_recv
  bnx2x: avoid leaking memory on bnx2x_init_one() failures
  fou: fix IPv6 Kconfig options
  openvswitch: update checksum in {push,pop}_mpls
  sctp: sctp_diag should dump sctp socket type
  net: fec: update dirty_tx even if no skb
  vlan: Propagate MAC address to VLANs
  atm: iphase: off by one in rx_pkt()
  atm: firestream: add more reserved strings
  vxlan: Accept user specified MTU value when create new vxlan link
  net: pktgen: Call destroy_hrtimer_on_stack()
  timer: Export destroy_hrtimer_on_stack()
  net: l2tp: Make l2tp_ip6 namespace aware
  Documentation: ip-sysctl.txt: clarify secure_redirects
  sfc: use flow dissector helpers for aRFS
  ieee802154: fix logic error in ieee802154_llsec_parse_dev_addr
  net: nps_enet: Disable interrupts before napi reschedule
  net/lapb: tuse %*ph to dump buffers
  ...

8 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc
Linus Torvalds [Wed, 1 Jun 2016 05:20:56 +0000 (22:20 -0700)]
Merge git://git./linux/kernel/git/davem/sparc

Pull sparc fixes from David Miller:
 "sparc64 mmu context allocation and trap return bug fixes"

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc:
  sparc64: Fix return from trap window fill crashes.
  sparc: Harden signal return frame checks.
  sparc64: Take ctx_alloc_lock properly in hugetlb_setup().

8 years agosfc: Track RPS flow IDs per channel instead of per function
Jon Cooper [Tue, 31 May 2016 18:12:32 +0000 (19:12 +0100)]
sfc: Track RPS flow IDs per channel instead of per function

Otherwise we get confused when two flows on different channels get the
 same flow ID.

Signed-off-by: Edward Cree <ecree@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agousbnet: smsc95xx: fix link detection for disabled autonegotiation
Christoph Fritz [Thu, 26 May 2016 02:06:47 +0000 (04:06 +0200)]
usbnet: smsc95xx: fix link detection for disabled autonegotiation

To detect link status up/down for connections where autonegotiation is
explicitly disabled, we don't get an irq but need to poll the status
register for link up/down detection.
This patch adds a workqueue to poll for link status.

Signed-off-by: Christoph Fritz <chf.fritz@googlemail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agovirtio_net: fix virtnet_open and virtnet_probe competing for try_fill_recv
wangyunjian [Tue, 31 May 2016 03:52:43 +0000 (11:52 +0800)]
virtio_net: fix virtnet_open and virtnet_probe competing for try_fill_recv

In function virtnet_open() and virtnet_probe(), func try_fill_recv() may
be executed at the same time. VQ in virtqueue_add() has not been protected
well and BUG_ON will be triggered when virito_net.ko being removed.

Signed-off-by: Yunjian Wang <wangyunjian@huawei.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agobnx2x: avoid leaking memory on bnx2x_init_one() failures
Vitaly Kuznetsov [Mon, 30 May 2016 13:00:54 +0000 (15:00 +0200)]
bnx2x: avoid leaking memory on bnx2x_init_one() failures

bnx2x_init_bp() allocates memory with bnx2x_alloc_mem_bp() so if we
fail later in bnx2x_init_one() we need to free this memory
with bnx2x_free_mem_bp() to avoid leakages. E.g. I'm observing memory
leaks reported by kmemleak when a failure (unrelated) happens in
bnx2x_vfpf_acquire().

Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Acked-by: Yuval Mintz <Yuval.Mintz@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agofou: fix IPv6 Kconfig options
Arnd Bergmann [Tue, 31 May 2016 20:42:11 +0000 (22:42 +0200)]
fou: fix IPv6 Kconfig options

The Kconfig options I added to work around broken compilation ended
up screwing up things more, as I used the wrong symbol to control
compilation of the file, resulting in IPv6 fou support to never be built
into the kernel.

Changing CONFIG_NET_FOU_IPV6_TUNNELS to CONFIG_IPV6_FOU fixes that
problem, I had renamed the symbol in one location but not the other,
and as the file is never being used by other kernel code, this did not
lead to a build failure that I would have caught.

After that fix, another issue with the same patch becomes obvious, as we
'select INET6_TUNNEL', which is related to IPV6_TUNNEL, but not the same,
and this can still cause the original build failure when IPV6_TUNNEL is
not built-in but IPV6_FOU is. The fix is equally trivial, we just need
to select the right symbol.

I have successfully build 350 randconfig kernels with this patch
and verified that the driver is now being built.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reported-by: Valentin Rothberg <valentinrothberg@gmail.com>
Fixes: fabb13db448e ("fou: add Kconfig options for IPv6 support")
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoopenvswitch: update checksum in {push,pop}_mpls
Simon Horman [Mon, 30 May 2016 05:04:25 +0000 (14:04 +0900)]
openvswitch: update checksum in {push,pop}_mpls

In the case of CHECKSUM_COMPLETE the skb checksum should be updated in
{push,pop}_mpls() as they the type in the ethernet header.

As suggested by Pravin Shelar.

Cc: Pravin Shelar <pshelar@nicira.com>
Fixes: 25cd9ba0abc0 ("openvswitch: Add basic MPLS support to kernel")
Signed-off-by: Simon Horman <simon.horman@netronome.com>
Acked-by: Pravin B Shelar <pshelar@ovn.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agosctp: sctp_diag should dump sctp socket type
Xin Long [Sun, 29 May 2016 09:42:13 +0000 (17:42 +0800)]
sctp: sctp_diag should dump sctp socket type

Now we cannot distinguish that one sk is a udp or sctp style when
we use ss to dump sctp_info. it's necessary to dump it as well.

For sctp_diag, ss support is not officially available, thus there
are no official users of this yet, so we can add this field in the
middle of sctp_info without breaking user API.

v1->v2:
  - move 'sctpi_s_type' field to the end of struct sctp_info, so
    that it won't cause incompatibility with applications already
    built.
  - add __reserved3 in sctp_info to make sure sctp_info is 8-byte
    alignment.

Signed-off-by: Xin Long <lucien.xin@gmail.com>
Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet: fec: update dirty_tx even if no skb
Troy Kisky [Fri, 27 May 2016 20:30:40 +0000 (13:30 -0700)]
net: fec: update dirty_tx even if no skb

If dirty_tx isn't updated, then dma_unmap_single
can be called twice.

This fixes a
[   58.420980] ------------[ cut here ]------------
[   58.425667] WARNING: CPU: 0 PID: 377 at /home/schurig/d/mkarm/linux-4.5/lib/dma-debug.c:1096 check_unmap+0x9d0/0xab8()
[   58.436405] fec 2188000.ethernet: DMA-API: device driver tries to free DMA memory it has not allocated [device address=0x0000000000000000] [size=66 bytes]

encountered by Holger

Signed-off-by: Troy Kisky <troy.kisky@boundarydevices.com>
Tested-by: <holgerschurig@gmail.com>
Acked-by: Fugang Duan <fugang.duan@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>