Add a short summary of the methods that a driver writer must implement
for offloading a HSR/PRP network interface.
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Reviewed-by: George McCollister <george.mccollister@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Add a short summary of the methods that a driver writer must implement
for getting an MRP instance to work on top of a DSA switch.

Cc: Horatiu Vultur <horatiu.vultur@microchip.com>
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Horatiu Vultur <horatiu.vultur@microchip.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Add a short summary of the methods that a driver writer must implement
for offloading a link aggregation group, and what is still missing.

Cc: Tobias Waldekranz <tobias@waldekranz.com>
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Reviewed-by: Tobias Waldekranz <tobias@waldekranz.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Add a short summary of the devlink features supported by the DSA core.
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

The documentation was already lagging behind by not mentioning the old
version of port_bridge_flags (port_set_egress_floods). So now we are
skipping one step and just explaining how a DSA driver should configure
address learning and flooding settings.
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

On one hand, the link is dead and therefore useless.

On the other hand, there are always more drivers to port, but at this
stage, DSA does not need to affirm itself as the driver model to use for
Ethernet-connected switches (since we already have 15 tagging protocols
supported and probably more switch families from various vendors), so
there is nothing actionable to do.
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

After the recent series containing commit bae33f2b ("net: switchdev:
remove the transaction structure from port attributes"), there aren't
prepare/commit transactional phases anymore in most of the switchdev
objects/attributes, and as a result, there aren't any in the DSA driver
API either. So remove this piece.
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

After Vivien's series from 2019 containing commits 27d4d19d ("net:
dsa: remove limitation of switch index value") and ab8ccae1 ("net:
dsa: add ports list in the switch fabric"), this is basically no longer
true.
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

The chapter about tagging protocols is out of date because it doesn't
mention all taggers that have been added since last documentation
update. But judging based on that, it will always tend to lag behind,
and there's no good reason why we would enumerate the supported
hardware. Instead we could do something more useful and explain what
there is to know about tagging protocols instead.
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Tobias Waldekranz <tobias@waldekranz.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

While preparing some slides for a customer presentation, I found the
existing high-level view to be a bit confusing, so I modified it a
little bit.
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Reviewed-by: Tobias Waldekranz <tobias@waldekranz.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Tony Nguyen says:

====================
1GbE Intel Wired LAN Driver Updates 2021-03-15

This series contains updates to e1000e only.

Chen Yu says:

The NIC is put in runtime suspend status when there is no cable connected.
As a result, it is safe to keep non-wakeup NIC in runtime suspended during
s2ram because the system does not rely on the NIC plug event nor WoL to
wake up the system. Besides that, unlike the s2idle, s2ram does not need to
manipulate S0ix settings during suspend.
====================
Acked-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

proc_creat_seq() that directly take a struct seq_operations,
and deal with network namespaces in ->open.
Signed-off-by: Yejune Deng <yejune.deng@gmail.com>
Reviewed-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

Nikolay Aleksandrov says:

====================
net: bridge: mcast: simplify allow/block EHT code

The set does two minor cleanups of the EHT allow/block handling code:
patch 01 removes code which is unreachable (it was used in initial EHT
versions, but isn't anymore) and prepares the allow/block functions to be
factored out. Patch 02 factors out common allow/block handling code.
There are no functional changes.

v2: send patch 02 and the proper version of both patches
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

We hande EHT state change for ALLOW messages in INCLUDE mode and for
BLOCK messages in EXCLUDE mode similarly - create the new set entries
with the proper filter mode. We also handle EHT state change for ALLOW
messages in EXCLUDE mode and for BLOCK messages in INCLUDE mode in a
similar way - delete the common entries (current set and new set).
Factor out all the common code as follows:
 - ALLOW/INCLUDE, BLOCK/EXCLUDE: call __eht_create_set_entries()
 - ALLOW/EXCLUDE, BLOCK/INCLUDE: call __eht_del_common_set_entries()

The set entries creation can be reused in __eht_inc_exc() as well.
Signed-off-by: Nikolay Aleksandrov <nikolay@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

In the initial EHT versions there were common functions which handled
allow/block messages for both INCLUDE and EXCLUDE modes, but later they
were separated. It seems I've left some common code which cannot be
reached because the filter mode is checked before calling the respective
functions, i.e. the host filter is always in EXCLUDE mode when using
__eht_allow_excl() and __eht_block_excl() thus we can drop the host_excl
checks inside and simplify the code a bit.
Signed-off-by: Nikolay Aleksandrov <nikolay@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Support port MDB and bridge flag operations.

As the hardware can manage multicast forwarding itself, offload_fwd_mark
can be unconditionally set to true.
Signed-off-by: DENG Qingfang <dqfext@gmail.com>
Reviewed-by: Vladimir Oltean <olteanv@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Álvaro Fernández Rojas says:

====================
net: mdio: Add BCM6368 MDIO mux bus controller

This controller is present on BCM6318, BCM6328, BCM6362, BCM6368 and BCM63268
SoCs.

v2: add changes suggested by Andrew Lunn and Jakub Kicinski.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

This controller is present on BCM6318, BCM6328, BCM6362, BCM6368 and BCM63268
SoCs.
Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Add documentations for bcm6368 mdio mux driver.
Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

There are two "netif_running" checks in this driver. One is in
"lapbeth_xmit" and the other is in "lapbeth_rcv". They serve to make
sure that the LAPB APIs called in these functions are called before
"lapb_unregister" is called by the "ndo_stop" function.

However, these "netif_running" checks are unreliable, because it's
possible that immediately after "netif_running" returns true, "ndo_stop"
is called (which causes "lapb_unregister" to be called).

This patch adds locking to make sure "lapbeth_xmit" and "lapbeth_rcv" can
reliably check and ensure the netif is running while doing their work.

Fixes: 1da177e4 ("Linux-2.6.12-rc2")
Signed-off-by: Xie He <xie.he.0141@gmail.com>
Acked-by: Martin Schiller <ms@dev.tdt.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

Alex Elder says:

====================
net: ipa: QMI fixes

Mani Sadhasivam discovered some errors in the definitions of some
QMI messages used for IPA.  This series addresses those errors,
and extends the definition of one message type to include some
newly-defined fields.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

The specified format of the INDICATION_REGISTER QMI request message
has been extended to support two more optional fields:
  endpoint_desc_ind:
    sender wishes to receive endpoint descriptor information via
    an IPA ENDP_DESC indication QMI message
  bw_change_ind:
    sender wishes to receive bandwidth change information via
    an IPA BW_CHANGE indication QMI message

Add definitions that permit these fields to be formatted and parsed
by the QMI library code.
Signed-off-by: Alex Elder <elder@linaro.org>
Acked-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

The ipa_init_modem_driver_req_ei[] encoding array for the
INIT_MODEM_DRIVER request message has some errors in it.

First, the tlv_type associated with the hw_stats_quota_size field is
wrong; it duplicates the valiue used for the hw_stats_quota_base_addr
field (0x1f) and should use 0x20 instead.  The tlv_type value for
the hw_stats_drop_size field also uses the same duplicate value; it
should use 0x22 instead.

Second, there is no definition for the hw_stats_drop_base_addr
field.  It is an optional 32-bit enumerated type value.

Finally, the hw_stats_quota_base_addr, hw_stats_quota_size, and
hw_stats_drop_size fields are defined as enumerated types; they
should be unsigned 4-byte values.
Reported-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Alex Elder <elder@linaro.org>
Acked-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

In the ipa_indication_register_req_ei[] encoding array, the tlv_type
associated with the ipa_mhi_ready_ind field is wrong.  It duplicates
the value used for the data_usage_quota_reached field (0x11) and
should use value 0x12 instead.  Fix this bug.
Reported-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Alex Elder <elder@linaro.org>
Acked-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

The return value 'rc' maybe overwrite to 0 in the flow_action_for_each
loop, the error code from the offload not support error handling will
not set. This commit fix it to return -EOPNOTSUPP.

Fixes: 6a56e199 ("flow_offload: reject configuration of packet-per-second policing in offload drivers")
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Add missing of_match_table to allow device tree probing.
Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Alphabetically sort header inclusion
Signed-off-by: Calvin Johnson <calvin.johnson@oss.nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Shannon Nelson says:

====================
ionic Tx updates

Just as the Rx path recently got a face lift, it is time for the Tx path to
get some attention.  The original TSO-to-descriptor mapping was ugly and
convoluted and needed some deep work.  This series pulls the dma mapping
out of the descriptor frag mapping loop and makes the dma mapping more
generic for use in the non-TSO case.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

Gather the Tx packet and byte counts and call
netdev_tx_completed_queue() only once per clean cycle.
Signed-off-by: Shannon Nelson <snelson@pensando.io>
Signed-off-by: David S. Miller <davem@davemloft.net>

The descriptor mappings are set up the same way whether
or not it is a TSO, so we don't need separate logic for
the two cases.
Signed-off-by: Shannon Nelson <snelson@pensando.io>
Signed-off-by: David S. Miller <davem@davemloft.net>

Make the new ionic_tx_map_tso() usable by the non-TSO paths,
and pull the call up a level into ionic_tx() before calling
the csum or no-csum routines.
Signed-off-by: Shannon Nelson <snelson@pensando.io>
Signed-off-by: David S. Miller <davem@davemloft.net>

One issue with the original TSO code was that it was working too
hard to deal with skb layouts that were never going to show up,
such as an skb->data that was longer than a single descriptor's
length.  The other issue was trying to arrange the fragment dma
mapping at the same time as figuring out the descriptors needed.
There was just too much going on at the same time.

Now we do the dma mapping first, which sets up the buffers with
skb->data in buf[0] and the remaining frags in buf[1..n-1].
Next we spread the bufs across the descriptors needed, where
each descriptor gets up to mss number of bytes.
Signed-off-by: Shannon Nelson <snelson@pensando.io>
Signed-off-by: David S. Miller <davem@davemloft.net>

Alex Elder says:

====================
net: qualcomm: rmnet: stop using C bit-fields

Version 6 is the same as version 5, but has been rebased on updated
net-next/master.  With any luck, the patches I'm sending out this
time won't contain garbage.

Version 5 of this series responds to a suggestion made by Alexander
Duyck, to determine the offset to the checksummed range of a packet
using skb_network_header_len() on patch 2.  I have added his
Reviewed-by tag to all (other) patches, and removed Bjorn's from
patch 2.

The change required some updates to the subsequent patches, and I
reordered some assignments in a minor way in the last patch.

I don't expect any more discussion on this series (but will respond
if there is any).  So at this point I would really appreciate it
if KS and/or Sean would offer a review, or at least acknowledge it.
I presume you two are able to independently test the code as well,
so I request that, and hope you are willing to do so.

Version 4 of this series is here:
  https://lore.kernel.org/netdev/20210315133455.1576188-1-elder@linaro.org
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

Replace the use of C bit-fields in the rmnet_map_ul_csum_header
structure with a single two-byte (big endian) structure member,
and use masks to encode or get values within it.  The content of
these fields can be accessed using simple bitwise AND and OR
operations on the (host byte order) value of the new structure
member.

Previously rmnet_map_ipv4_ul_csum_header() would update C bit-field
values in host byte order, then forcibly fix their byte order using
a combination of byte swap operations and types.

Instead, just compute the value that needs to go into the new
structure member and save it with a simple byte-order conversion.

Make similar simplifications in rmnet_map_ipv6_ul_csum_header().

Finally, in rmnet_map_checksum_uplink_packet() a set of assignments
zeroes every field in the upload checksum header.  Replace that with
a single memset() operation.
Signed-off-by: Alex Elder <elder@linaro.org>
Reviewed-by: Alexander Duyck <alexanderduyck@fb.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Replace the use of C bit-fields in the rmnet_map_dl_csum_trailer
structure with a single one-byte field, using constant field masks
to encode or get at embedded values.
Signed-off-by: Alex Elder <elder@linaro.org>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Reviewed-by: Alexander Duyck <alexanderduyck@fb.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

The actual layout of bits defined in C bit-fields (e.g. int foo : 3)
is implementation-defined.  Structures defined in <linux/if_rmnet.h>
address this by specifying all bit-fields twice, to cover two
possible layouts.

I think this pattern is repetitive and noisy, and I find the whole
notion of compiler "bitfield endianness" to be non-intuitive.

Stop using C bit-fields for the command/data flag and the pad length
fields in the rmnet_map structure, and define a single-byte flags
field instead.  Define a mask for the single-bit "command" flag,
and another mask for the encoded pad length.  The content of both
fields can be accessed using a simple bitwise AND operation.
Signed-off-by: Alex Elder <elder@linaro.org>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Reviewed-by: Alexander Duyck <alexanderduyck@fb.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

The following macros, defined in "rmnet_map.h", assume a socket
buffer is provided as an argument without any real indication this
is the case.
    RMNET_MAP_GET_MUX_ID()
    RMNET_MAP_GET_CD_BIT()
    RMNET_MAP_GET_PAD()
    RMNET_MAP_GET_CMD_START()
    RMNET_MAP_GET_LENGTH()
What they hide is pretty trivial accessing of fields in a structure,
and it's much clearer to see this if we do these accesses directly.

So rather than using these accessor macros, assign a local
variable of the map header pointer type to the socket buffer data
pointer, and derereference that pointer variable.

In "rmnet_map_data.c", use sizeof(object) rather than sizeof(type)
in one spot.  Also, there's no need to byte swap 0; it's all zeros
irrespective of endianness.
Signed-off-by: Alex Elder <elder@linaro.org>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Reviewed-by: Alexander Duyck <alexanderduyck@fb.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

In rmnet_map_ipv4_ul_csum_header() and rmnet_map_ipv6_ul_csum_header()
the offset within a packet at which checksumming should commence is
calculated.  This calculation involves byte swapping and a forced type
conversion that makes it hard to understand.

Simplify this by computing the offset in host byte order, then
converting the result when assigning it into the header field.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

The fields in the checksum trailer structure used for QMAP protocol
RX packets are all big-endian format, so define them that way.

It turns out these fields are never actually used by the RMNet code.
The start offset is always assumed to be zero, and the length is
taken from the other packet headers.  So making these fields
explicitly big endian has no effect on the behavior of the code.
Signed-off-by: Alex Elder <elder@linaro.org>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Reviewed-by: Alexander Duyck <alexanderduyck@fb.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Although there is platform issue of runtime suspend support
on CNP, it would be more flexible to let the user decide whether
to disable runtime or not because:
1. This can be done in userspace via
   echo on > /sys/devices/pci0000\:00/0000\:00\:1f.d/power/control
2. More and more NICs would support runtime suspend, disabling the
   runtime suspend on them by default would impact the validation.

Only disable runtime suspend on CNP in case of any user space regression.
Signed-off-by: Chen Yu <yu.c.chen@intel.com>
Tested-by: Dvora Fuxbrumer <dvorax.fuxbrumer@linux.intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>