Extend ndo_setup_tc() to support ingress tc offloading. Will be used by
later patches to offload tc flower filter.

Feature is off by default and could be enabled by issuing:
 # ethtool  -K eth0 hw-tc-offload on

Offloads flow table is dynamically created when first filter is
added.
Rules are saved in a hash table that is maintained by the consumer (for
example - the flower offload in the next patch).
When last filter is removed and no filters exist in the hash table, the
offload flow table is destroyed.
Signed-off-by: NAmir Vadai <amir@vadai.me>
Signed-off-by: NOr Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Move the vlan and main flow tables to use priority 1. This will allow
the upcoming TC offload logic to use a higher priority (0) for the
offload steering table.
Signed-off-by: NAmir Vadai <amir@vadai.me>
Signed-off-by: NOr Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Restricting handle to TC_H_ROOT breaks the old instantiation of mqprio
to setup a hardware qdisc. This patch relaxes the test, to only check the
type.

Fixes: 08fb1dac ("net/mlx5e: Support DCBNL IEEE ETS")
Signed-off-by: NAmir Vadai <amir@vadai.me>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

We need to handle flow table entry destinations only if the action
associated with the rule is forwarding (MLX5_FLOW_CONTEXT_ACTION_FWD_DEST).

Fixes: 26a81453 ('net/mlx5_core: Introduce flow steering firmware commands')
Signed-off-by: NAmir Vadai <amir@vadai.me>
Signed-off-by: NMaor Gottlieb <maorg@mellanox.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Enable device drivers to query the action, if and only if is a mark
action and what value to use for marking.
Acked-by: NJiri Pirko <jiri@mellanox.com>
Signed-off-by: NAmir Vadai <amir@vadai.me>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Introduce the macros tc_no_actions and tc_for_each_action to make code
clearer.
Extracted struct tc_action out of the ifdef to make calls to
is_tcf_gact_shot() and similar functions valid, even when it is a nop.
Acked-by: NJiri Pirko <jiri@mellanox.com>
Acked-by: NJohn Fastabend <john.r.fastabend@intel.com>
Suggested-by: NJiri Pirko <jiri@mellanox.com>
Signed-off-by: NAmir Vadai <amir@vadai.me>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Will be used in a following patch to query if a key is being used, and
what it's value in the target object.
Acked-by: NJohn Fastabend <john.r.fastabend@intel.com>
Acked-by: NJiri Pirko <jiri@mellanox.com>
Signed-off-by: NAmir Vadai <amir@vadai.me>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

This patch is based on a patch made by John Fastabend.
It adds support for offloading cls_flower.
when NETIF_F_HW_TC is on:
  flags = 0       => Rule will be processed twice - by hardware, and if
                     still relevant, by software.
  flags = SKIP_HW => Rull will be processed by software only

If hardware fail/not capabale to apply the rule, operation will NOT
fail. Filter will be processed by SW only.
Acked-by: NJiri Pirko <jiri@mellanox.com>
Suggested-by: NJohn Fastabend <john.r.fastabend@intel.com>
Signed-off-by: NAmir Vadai <amir@vadai.me>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

John Crispin says:

====================
net-next: mediatek: add ethernet driver

This series adds support for the Mediatek ethernet core found on current ARM
based SoCs. The driver works on MT2701 and MT7623 SoCs

Instead of trying to upstream everything at once I decided to concentrate on
the important parts required to make current generation silicon work. The V3
series only includes the code required to make dual MAC setups work and only
supports the newer QDMA engine.

Changes in V5
* reduce the mdio timeut to HZ
* add a call to usleep_range() which schedules in the background.

Changes in V4
* remove ugly _FE macro, use offsetof() instead

Changes in V3
* only include code for MT2701/7623 support
* drop support for PDMA and older MIPS based SoCs
* drop switch support

Changes in V2
* change the namespace of the functions from fe_* to mtk_*
* add support for the latest generation of ARM SoCs
* add dual MAC support
* remove the swconfig specific bits
* remove most of the magic values and replace them with defines
* add verbose descriptions to the patches
====================
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Add myself and Felix as the Maintainers for the MediaTek ethernet driver.
Signed-off-by: NFelix Fietkau <nbd@openwrt.org>
Signed-off-by: NJohn Crispin <blogic@openwrt.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

This patch adds the Makefile and Kconfig required to make the driver build.
Signed-off-by: NJohn Crispin <blogic@openwrt.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Add ethernet support for MediaTek SoCs from the MT7623 family. These have
dual GMAC. Depending on the exact version, there might be a built-in
Gigabit switch (MT7530). The core does not have the typical DMA ring setup.
Instead there is a linked list that we add descriptors to. There is only
one linked list that both MACs use together. There is a special field
inside the TX descriptors called the VQID. This allows us to assign packets
to different internal queues. By using a separate id for each MAC we are
able to get deterministic results for BQL. Additionally we need to
provide the core with a block of scratch memory that is the same size as
the RX ring and data buffer. This is really needed to make the HW datapath
work. Although the driver does not support this yet, we still need to
assign the memory and tell the core about it for RX to work.
Signed-off-by: NFelix Fietkau <nbd@openwrt.org>
Signed-off-by: NMichael Lee <igvtee@gmail.com>
Signed-off-by: NJohn Crispin <blogic@openwrt.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

This adds the binding documentation for the MediaTek Ethernet
controller.
Signed-off-by: NJohn Crispin <blogic@openwrt.org>
Acked-by: NRob Herring <robh@kernel.org>
Cc: devicetree@vger.kernel.org
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The initial commit badly merged into the dsa_resume method instead
of the dsa_remove_dst method.
As consequence, the dst->master_netdev->dsa_ptr is not set to NULL on
removal and re-bind of the dsa device fails with error -17.

Fixes: b0dc635d ("net: dsa: cleanup resources upon module removal ")
Signed-off-by: NNeil Armstrong <narmstrong@baylibre.com>
Acked-by: NAndrew Lunn <andrew@lunn.ch>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

'commit 55482edc
("qede: Add slowpath/fastpath support and enable hardware GRO")'
introduces below error when compiling net-next with "make ARCH=x86_64"

drivers/built-in.o: In function `qede_rx_int':
qede_main.c:(.text+0x6101a0): undefined reference to `tcp_gro_complete'
Signed-off-by: NManish Chopra <manish.chopra@qlogic.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Rajesh Borundia says:

====================
qlcnic fixes

This series adds following fixes.

o While processing mailbox if driver gets a spurious mailbox
  interrupt it leads into premature completion of a next
  mailbox request. Added a guard against this by checking current
  state of mailbox and ignored spurious interrupt.
  Added a stats counter to record this condition.

v2:

o Added patch that removes usage of atomic_t as we are not implemeting
  atomicity by using atomic_t value.
====================
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

o While the driver is in the middle of a MB completion processing
and it receives a spurious MB interrupt, it is mistaken as a good MB
completion interrupt leading to premature completion of the next MB
request. Fix the driver to guard against this by checking the current
state of MB processing and ignore the spurious interrupt.
Also added a stats counter to record this condition.
Signed-off-by: NRajesh Borundia <rajesh.borundia@qlogic.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

o atomic_t usage is incorrect as we are not implementing
any atomicity.
Signed-off-by: NRajesh Borundia <rajesh.borundia@qlogic.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Hariprasad Shenai says:

====================
cxgb4vf: Interrupt and queue configuration changes

This series fixes some issues and some changes in the queue and interrupt
configuration for cxgb4vf driver. We need to enable interrupts before we
register our network device, so that we don't loose link up interrupts.
Allocate rx queues based on interrupt type. Set number of tx/rx queues in
probe function only. Also adds check for some invalid configurations.

This patch series has been created against net-next tree and includes
patches on cxgb4vf driver.

We have included all the maintainers of respective drivers. Kindly review
the change and let us know in case of any review comments.
====================
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Signed-off-by: NHariprasad Shenai <hariprasad@chelsio.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Signed-off-by: NHariprasad Shenai <hariprasad@chelsio.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The Queue Set Configuration code was always reserving room for a
Forwarded interrupt Queue even in the cases where we weren't using it.
Figure out how many Ports and Queue Sets we can support. This depends on
knowing our Virtual Function Resources and may be called a second time
if we fall back from MSI-X to MSI Interrupt Mode. This change fixes that
problem.
Signed-off-by: NHariprasad Shenai <hariprasad@chelsio.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

This avoids a race condition where a system that has network devices set up
to be automatically configured and we get the first Port Link Status
message from the firmware on the Asynchronous Firmware Event Queue before
we've enabled interrupts. If that happens, we end up losing the interrupt
and never realizing that the links has actually come up.
Signed-off-by: NHariprasad Shenai <hariprasad@chelsio.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

There is no need to change the 802.1Q port mode for the same value.
Thus avoid such message:

    [  401.954836] dsa dsa@0 lan0: 802.1Q Mode: Disabled (was Disabled)
Signed-off-by: NVivien Didelot <vivien.didelot@savoirfairelinux.com>
Tested-by: NAndrew Lunn <andrew@lunn.ch>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The port register 0x07 contains more options than just the default VID,
even though they are not used yet. So prefer a read then write operation
over a direct write.

This also allows to keep track of the change through dynamic debug.
Signed-off-by: NVivien Didelot <vivien.didelot@savoirfairelinux.com>
Tested-by: NAndrew Lunn <andrew@lunn.ch>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Apply a few non-functional changes on the port state setter:

  * add a dynamic debug message with state names to track changes
  * explicit states checking instead of assuming their numeric values
  * lock mutex only once when changing several port states
  * use bitmap macros to declare and access port_state_update_mask
Signed-off-by: NVivien Didelot <vivien.didelot@savoirfairelinux.com>
Tested-by: NAndrew Lunn <andrew@lunn.ch>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Sergei Shtylyov says:

====================
sh_eth: fix couple of bugs in sh_eth_ring_format()

   Here's a set of 2 patches against DaveM's 'net.git' repo fixing two bugs
in sh_eth_.ring_format()...

[1/2] sh_eth: fix NULL pointer dereference in sh_eth_ring_format()
[2/2] sh_eth: advance 'rxdesc' later in sh_eth_ring_format()
====================
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Iff dma_map_single() fails, 'rxdesc'  should point  to the last filled RX
descriptor, so  that it can be marked as the last one, however the driver
would have  already  advanced it by that time. In order to fix that, only
fill  an RX descriptor  once all the data for it is ready.
Signed-off-by: NSergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

In a low memory situation, if netdev_alloc_skb() fails on a first RX ring
loop iteration  in sh_eth_ring_format(), 'rxdesc' is still NULL.  Avoid
kernel oops by adding the 'rxdesc' check after the loop.
Reported-by: NWolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: NSergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The stub helper functions for the newly added kcm_proc_init/exit interfaces
are defined as 'static' in a header file, which leads to build warnings for
each file that includes them without calling them:

include/net/kcm.h:183:12: error: 'kcm_proc_init' defined but not used [-Werror=unused-function]
include/net/kcm.h:184:13: error: 'kcm_proc_exit' defined but not used [-Werror=unused-function]

This marks the two functions as 'static inline' instead, which avoids the
warnings and is obviously what was meant here.
Signed-off-by: NArnd Bergmann <arnd@arndb.de>
Fixes: cd6e111b ("kcm: Add statistics and proc interfaces")
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Merge tag 'linux-can-next-for-4.6-20160310' of git://git.kernel.org/pub/scm/linux/kernel/git/mkl/linux-can-next

Marc Kleine-Budde says:

====================
pull-request: can-next 2016-03-10

this is a pull request of 5 patch for net-next/master.

Marek Vasut contributes 4 patches for the ifi CAN driver, which makes
it work on real hardware. There is one patch by Ramesh Shanmugasundaram
for the rcar_can driver that adds support for the 3rd generation IP
core.
====================
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Added r8a7795 SoC support.
Signed-off-by: NRamesh Shanmugasundaram <ramesh.shanmugasundaram@bp.renesas.com>
Acked-by: NRob Herring <robh@kernel.org>
Signed-off-by: NMarc Kleine-Budde <mkl@pengutronix.de>

In case of CAN2.0 EFF frame, the controller handles frame IDs in a
rather bizzare way. The ID is split into an extended part, IDX[28:11]
and standard part, ID[10:0]. In the TX path, the core first sends the
top 11 bits of the IDX, followed by ID and finally the rest of IDX.
In the RX path, the core stores the ID the LSbit part of IDX field,
followed by the LSbit parts of real IDX. The MSbit parts of IDX are
stored in ID field of the register.

This patch implements the necessary bit shuffling to mitigate this
obscure behavior. In case two of these controllers are connected
together, the RX and TX bit swapping nullifies itself and the issue
does not manifest. The issue only manifests when talking to another
different CAN controller.
Signed-off-by: NMarek Vasut <marex@denx.de>
Cc: Marc Kleine-Budde <mkl@pengutronix.de>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Oliver Hartkopp <socketcan@hartkopp.net>
Cc: Wolfgang Grandegger <wg@grandegger.com>
Reviewed-by: NOliver Hartkopp <socketcan@hartkopp.net>
Signed-off-by: NMarc Kleine-Budde <mkl@pengutronix.de>

The RX and TX ID mask for CAN2.0 is 11 bits wide. This patch fixes
the incorrect mask, which caused the CAN IDs to miss the MSBit both
on receive and transmit.
Signed-off-by: NMarek Vasut <marex@denx.de>
Cc: Marc Kleine-Budde <mkl@pengutronix.de>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Oliver Hartkopp <socketcan@hartkopp.net>
Cc: Wolfgang Grandegger <wg@grandegger.com>
Reviewed-by: NOliver Hartkopp <socketcan@hartkopp.net>
Signed-off-by: NMarc Kleine-Budde <mkl@pengutronix.de>

The TX DLC, the transmission length information, was not written
into the transmit configuration register. When using the CAN core
with different CAN controller, the receiving CAN controller will
receive only the ID part of the CAN frame, but no data at all.

This patch adds the TX DLC into the register to fix this issue.
Signed-off-by: NMarek Vasut <marex@denx.de>
Cc: Marc Kleine-Budde <mkl@pengutronix.de>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Oliver Hartkopp <socketcan@hartkopp.net>
Cc: Wolfgang Grandegger <wg@grandegger.com>
Reviewed-by: NOliver Hartkopp <socketcan@hartkopp.net>
Signed-off-by: NMarc Kleine-Budde <mkl@pengutronix.de>

The clock generation does not match reality when using the CAN IP
core outside of the FPGA design. This patch fixes the computation
of values which are programmed into the clock generator registers.

First, there are some off-by-one errors which manifest themselves
only when communicating with different controller, so those are
fixed.

Second, the bits in the clock generator registers have different
meaning depending on whether the core is in ISO CANFD mode or any
of the other modes (BOSCH CANFD or CAN2.0). Detect the ISO CANFD
mode and fix handling of this special case of clock configuration.

Finally, the CAN clock speed is in CANCLOCK register, not SYSCLOCK
register, so fix this as well.
Signed-off-by: NMarek Vasut <marex@denx.de>
Cc: Marc Kleine-Budde <mkl@pengutronix.de>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Oliver Hartkopp <socketcan@hartkopp.net>
Cc: Wolfgang Grandegger <wg@grandegger.com>
Reviewed-by: NOliver Hartkopp <socketcan@hartkopp.net>
Signed-off-by: NMarc Kleine-Budde <mkl@pengutronix.de>

Lots of places in the kernel use memcpy(buf, comm, TASK_COMM_LEN); but
the result is typically passed to print("%s", buf) and extra bytes
after zero don't cause any harm.
In bpf the result of bpf_get_current_comm() is used as the part of
map key and was causing spurious hash map mismatches.
Use strlcpy() to guarantee zero-terminated string.
bpf verifier checks that output buffer is zero-initialized,
so even for short task names the output buffer don't have junk bytes.
Note it's not a security concern, since kprobe+bpf is root only.

Fixes: ffeedafb ("bpf: introduce current->pid, tgid, uid, gid, comm accessors")
Reported-by: NTobias Waldekranz <tobias@waldekranz.com>
Signed-off-by: NAlexei Starovoitov <ast@kernel.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

0-day bot reported build error:
kernel/built-in.o: In function `map_lookup_elem':
>> kernel/bpf/.tmp_syscall.o:(.text+0x329b3c): undefined reference to `bpf_stackmap_copy'
when CONFIG_BPF_SYSCALL is set and CONFIG_PERF_EVENTS is not.
Add weak definition to resolve it.
This code path in map_lookup_elem() is never taken
when CONFIG_PERF_EVENTS is not set.

Fixes: 557c0c6e ("bpf: convert stackmap to pre-allocation")
Reported-by: NFengguang Wu <fengguang.wu@intel.com>
Signed-off-by: NAlexei Starovoitov <ast@kernel.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Willem de Bruijn says:

====================
net: validate variable length ll headers

Allow device-specific validation of link layer headers. Existing
checks drop all packets shorter than hard_header_len. For variable
length protocols, such packets can be valid.

patch 1 adds header_ops.validate and dev_validate_header
patch 2 implements the protocol specific callback for AX25
patch 3 replaces ll_header_truncated with dev_validate_header
====================
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Replace link layer header validation check ll_header_truncate with
more generic dev_validate_header.

Validation based on hard_header_len incorrectly drops valid packets
in variable length protocols, such as AX25. dev_validate_header
calls header_ops.validate for such protocols to ensure correctness
below hard_header_len.

See also http://comments.gmane.org/gmane.linux.network/401064

Fixes 9c707762 ("packet: make packet_snd fail on len smaller than l2 header")
Signed-off-by: NWillem de Bruijn <willemb@google.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>