Jacob Keller says:

====================
ptp: convert drivers to .adjfine

Many drivers implementing PTP have not yet migrated to the new .adjfine
frequency adjustment implementation.

A handful of these drivers use hardware with a simple increment value which
is adjusted by multiplying by the adjustment factor and then dividing by
1 billion. This calculation is very easy to convert to .adjfine, by simply
updating the divisor.

Introduce new helper functions, diff_by_scaled_ppm and adjust_by_scaled_ppm
which perform the most common calculations used by drivers for this purpose.

The adjust_by_scaled_ppm takes the base increment and scaled PPM value, and
calculates the new increment to use.

A few drivers need the difference and direction rather than a raw increment
value. The diff_by_scaled_ppm calculates the difference and returns true if
it should be a subtraction, false otherwise. This most closely aligns with
existing driver implementations.

I previously submitted v1 of this series at [1], and got some feedback only
on a handful of drivers. In the interest of merging the changes which have
received feedback, I've dropped the following drivers out of this send:

 * ptp_phc
 * ptp_ipx46x
 * tg3
 * hclge
 * stmac
 * cpts

I plan to submit those drivers changes again at a later date. As before,
there are some drivers which are not trivial to convert to the new helper
functions. While they may be able to work, their implementation is different
and I lack the hardware or datasheets to determine what the correct
implementation would be.

* drivers/net/ethernet/broadcom/bnx2x
* drivers/net/ethernet/broadcom/bnxt
* drivers/net/ethernet/cavium/liquidio
* drivers/net/ethernet/chelsio/cxgb4
* drivers/net/ethernet/freescale
* drivers/net/ethernet/qlogic/qed
* drivers/net/ethernet/qlogic/qede
* drivers/net/ethernet/sfc
* drivers/net/ethernet/sfc/siena
* drivers/net/ethernet/ti/am65-cpts.c
* drivers/ptp/ptp_dte.c

My end goal is to drop the .adjfreq implementation entirely, and to that end
I plan on modifying these drivers in the future to directly use
scaled_ppm_to_ppb as the simplest method to convert them.

Changes since v2:
* Rebased to allow landing in 6.2
* Added Richard's Acked-by

Cc: "K. Y. Srinivasan" <kys@microsoft.com>
Cc: Haiyang Zhang <haiyangz@microsoft.com>
Cc: Stephen Hemminger <sthemmin@microsoft.com>
Cc: Wei Liu <wei.liu@kernel.org>
Cc: Dexuan Cui <decui@microsoft.com>
Cc: Tom Lendacky <thomas.lendacky@amd.com>
Cc: Shyam Sundar S K <Shyam-sundar.S-k@amd.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Eric Dumazet <edumazet@google.com>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: Paolo Abeni <pabeni@redhat.com>
Cc: Siva Reddy Kallam <siva.kallam@broadcom.com>
Cc: Prashant Sreedharan <prashant@broadcom.com>
Cc: Michael Chan <mchan@broadcom.com>
Cc: Yisen Zhuang <yisen.zhuang@huawei.com>
Cc: Salil Mehta <salil.mehta@huawei.com>
Cc: Jesse Brandeburg <jesse.brandeburg@intel.com>
Cc: Tony Nguyen <anthony.l.nguyen@intel.com>
Cc: Tariq Toukan <tariqt@nvidia.com>
Cc: Saeed Mahameed <saeedm@nvidia.com>
Cc: Leon Romanovsky <leon@kernel.org>
Cc: Bryan Whitehead <bryan.whitehead@microchip.com>
Cc: Sergey Shtylyov <s.shtylyov@omp.ru>
Cc: Giuseppe Cavallaro <peppe.cavallaro@st.com>
Cc: Alexandre Torgue <alexandre.torgue@foss.st.com>
Cc: Jose Abreu <joabreu@synopsys.com>
Cc: Maxime Coquelin <mcoquelin.stm32@gmail.com>
Cc: Richard Cochran <richardcochran@gmail.com>
Cc: Vivek Thampi <vithampi@vmware.com>
Cc: VMware PV-Drivers Reviewers <pv-drivers@vmware.com>
Cc: Jie Wang <wangjie125@huawei.com>
Cc: Jacob Keller <jacob.e.keller@intel.com>
Cc: Guangbin Huang <huangguangbin2@huawei.com>
Cc: Eran Ben Elisha <eranbe@nvidia.com>
Cc: Aya Levin <ayal@nvidia.com>
Cc: Cai Huoqing <cai.huoqing@linux.dev>
Cc: Biju Das <biju.das.jz@bp.renesas.com>
Cc: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Cc: Phil Edworthy <phil.edworthy@renesas.com>
Cc: Jiasheng Jiang <jiasheng@iscas.ac.cn>
Cc: "Gustavo A. R. Silva" <gustavoars@kernel.org>
Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: Wan Jiabing <wanjiabing@vivo.com>
Cc: Lv Ruyi <lv.ruyi@zte.com.cn>
Cc: Arnd Bergmann <arnd@arndb.de>
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

The xgbe implementation of .adjfreq is implemented in terms of a
straight forward "base * ppb / 1 billion" calculation.

Convert this driver to .adjfine and use adjust_by_scaled_ppm to calculate
the new addend value.
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Acked-by: Richard Cochran <richardcochran@gmail.com>
Acked-by: Tom Lendacky <thomas.lendacky@amd.com>
Cc: Shyam Sundar S K <Shyam-sundar.S-k@amd.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

The ravb implementation of .adjfreq is implemented in terms of a
straight forward "base * ppb / 1 billion" calculation.

Convert this driver to .adjfine and use the adjust_by_scaled_ppm helper
function to calculate the new addend.
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Acked-by: Richard Cochran <richardcochran@gmail.com>
Cc: Sergey Shtylyov <s.shtylyov@omp.ru>
Cc: Biju Das <biju.das.jz@bp.renesas.com>
Cc: Phil Edworthy <phil.edworthy@renesas.com>
Cc: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Cc: linux-renesas-soc@vger.kernel.org
Signed-off-by: David S. Miller <davem@davemloft.net>

Update the lan743x driver to use the recently added diff_by_scaled_ppm
helper function. This reduces the amount of code required in lan743x_ptp.c
driver file.
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Acked-by: Richard Cochran <richardcochran@gmail.com>
Cc: Bryan Whitehead <bryan.whitehead@microchip.com>
Cc: UNGLinuxDriver@microchip.com
Signed-off-by: David S. Miller <davem@davemloft.net>

The lan743x driver implements both .adjfreq and .adjfine, but the core PTP
subsystem prefers .adjfine if implemented. There is no reason to carry a
.adjfreq implementation, so we can remove it.
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Acked-by: Richard Cochran <richardcochran@gmail.com>
Cc: Bryan Whitehead <bryan.whitehead@microchip.com>
Cc: UNGLinuxDriver@microchip.com
Signed-off-by: David S. Miller <davem@davemloft.net>

The mlx5 implementation of .adjfreq is implemented in terms of a
straight forward "base * ppb / 1 billion" calculation.

Convert this to the .adjfine interface and use adjust_by_scaled_ppm for the
calculation  of the new mult value.

Note that the mlx5_ptp_adjfreq_real_time function expects input in terms of
ppb, so use the scaled_ppm_to_ppb to convert before passing to this
function.
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Tested-by: Shirly Ohnona <shirlyo@nvidia.com>
Acked-by: Richard Cochran <richardcochran@gmail.com>
Cc: Gal Pressman <gal@nvidia.com>
Cc: Saeed Mahameed <saeedm@nvidia.com>
Cc: Leon Romanovsky <leon@kernel.org>
Cc: Aya Levin <ayal@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

The mlx4 implementation of .adjfreq is implemented in terms of a
straight forward "base * ppb / 1 billion" calculation.

Convert this driver to .adjfine and use adjust_by_scaled_ppm to perform the
calculation.
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Acked-by: Richard Cochran <richardcochran@gmail.com>
Cc: Tariq Toukan <tariqt@nvidia.com>
Reviewed-by: Tariq Toukan <tariqt@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

A few PTP drivers implement a .adjfreq handler which indicates the
operation is not supported. Convert all of these to .adjfine.
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Acked-by: Richard Cochran <richardcochran@gmail.com>
Cc: "K. Y. Srinivasan" <kys@microsoft.com>
Cc: Haiyang Zhang <haiyangz@microsoft.com>
Cc: Stephen Hemminger <sthemmin@microsoft.com>
Cc: Wei Liu <wei.liu@kernel.org>
Cc: Dexuan Cui <decui@microsoft.com>
Cc: Vivek Thampi <vithampi@vmware.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Many drivers implement the .adjfreq or .adjfine PTP op function with the
same basic logic:

  1. Determine a base frequency value
  2. Multiply this by the abs() of the requested adjustment, then divide by
     the appropriate divisor (1 billion, or 65,536 billion).
  3. Add or subtract this difference from the base frequency to calculate a
     new adjustment.

A few drivers need the difference and direction rather than the combined
new increment value.

I recently converted the Intel drivers to .adjfine and the scaled parts per
million (65.536 parts per billion) logic. To avoid overflow with minimal
loss of precision, mul_u64_u64_div_u64 was used.

The basic logic used by all of these drivers is very similar, and leads to
a lot of duplicate code to perform the same task.

Rather than keep this duplicate code, introduce diff_by_scaled_ppm and
adjust_by_scaled_ppm. These helper functions calculate the difference or
adjustment necessary based on the scaled parts per million input.

The diff_by_scaled_ppm function returns true if the difference should be
subtracted, and false otherwise.

Update the Intel drivers to use the new helper functions. Other vendor
drivers will be converted to .adjfine and this helper function in the
following changes.
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Acked-by: Richard Cochran <richardcochran@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

The ptp_find_pin_unlocked function and the ptp_system_timestamp structure
didn't document their parameters and fields. Fix this.
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Acked-by: Richard Cochran <richardcochran@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Add a driver for the motorcomm yt8521 gigabit ethernet phy. We have verified
 the driver on StarFive VisionFive development board, which is developed by
 Shanghai StarFive Technology Co., Ltd.. On the board, yt8521 gigabit ethernet
 phy works in utp mode, RGMII interface, supports 1000M/100M/10M speeds, and
 wol(magic package).
Signed-off-by: Frank <Frank.Sae@motor-comm.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

test_callbacks and test_vctrl are only used in vcap_api_kunit.c now,
change them to static.

Fixes: 67d63751 ("net: microchip: sparx5: Adding KUNIT test for the VCAP API")
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Reviewed-by: Steen Hegelund <Steen.Hegelund@microchip.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

New compilers don't like flexible array of flexible structs:

  include/net/geneve.h:62:34: warning: array of flexible structures
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

hnae_ae_register() is called from hns_dsaf_probe(), the refcount of
module hnae has already be got in resolve_symbol() while calling the
function, so the __module_get()/module_put() can be removed.
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Clean up the use of unsafe_memcpy() by adding a flexible array
at the end of netlink message header and splitting up the header
and data copies.
Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

Signed-off-by: Dennis Kirjanov <dkirjanov@suse.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

The queue configuration is referenced by snps,mtl-rx-config and
snps,mtl-tx-config. Some in-tree DTs and the example put the
referenced config nodes directly beneath the root node, but
most in-tree DTs put it as child node of the dwmac node.

This adds proper description for this setup, which has the
advantage of validating the queue configuration node content.

The example is also updated to use the sub-node style, incl.
the axi bus configuration node, which got the same treatment
as the queues config in 5361660a ("dt-bindings: net: snps,dwmac:
Document stmmac-axi-config subnode").
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

Currently, use dev->reg_state == NETREG_UNREGISTERING to check the status
which is NETREG_UNREGISTERING, rather than using netdev_unregistering.
Also, A helper function which is netdev_unregistering on nedevice.h is no
longer used. Thus, netdev_unregistering removes from netdevice.h.
Signed-off-by: Juhee Kang <claudiajkang@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Saeed Mahameed says:

====================
mlx5-updates-2022-10-24

SW steering updates from Yevgeny Kliteynik:

1) 1st Four patches: small fixes / optimizations for SW steering:

 - Patch 1: Don't abort destroy flow if failed to destroy table - continue
   and free everything else.
 - Patches 2 and 3 deal with fast teardown:
    + Skip sync during fast teardown, as PCI device is not there any more.
    + Check device state when polling CQ - otherwise SW steering keeps polling
      the CQ forever, because nobody is there to flush it.
 - Patch 4: Removing unneeded function argument.

2) Deal with the hiccups that we get during rules insertion/deletion,
which sometimes reach 1/4 of a second. While insertion/deletion rate
improvement was not the focus here, it still is a by-product of removing these
hiccups.

Another by-product is the reduced standard deviation in measuring the duration
of rules insertion/deletion bursts.

In the testing we add K rules (warm-up phase), and then continuously do
insertion/deletion bursts of N rules.
During the test execution, the driver measures hiccups (amount and duration)
and total time for insertion/deletion of a batch of rules.

Here are some numbers, before and after these patches:

+--------------------------------------------+-----------------+----------------+
|                                            |   Create rules  |  Delete rules  |
|                                            +--------+--------+--------+-------+
|                                            | Before |  After | Before | After |
+--------------------------------------------+--------+--------+--------+-------+
| Max hiccup [msec]                          |    253 |     42 |    254 |    68 |
+--------------------------------------------+--------+--------+--------+-------+
| Avg duration of 10K rules add/remove [msec]| 140.07 | 124.32 | 106.99 | 99.51 |
+--------------------------------------------+--------+--------+--------+-------+
| Num of hiccups per 100K rules add/remove   |   7.77 |   7.97 |  12.60 | 11.57 |
+--------------------------------------------+--------+--------+--------+-------+
| Avg hiccup duration [msec]                 |  36.92 |  33.25 |  36.15 | 33.74 |
+--------------------------------------------+--------+--------+--------+-------+

 - Patch 5: Allocate a short array on stack instead of dynamically- it is
   destroyed at the end of the function.
 - Patch 6: Rather than cleaning the corresponding chunk's section of
   ste_arrays on chunk deletion, initialize these areas upon chunk creation.
   Chunk destruction tend to come in large batches (during pool syncing),
   so instead of doing huge memory initialization during pool sync,
   we amortize this by doing small initsializations on chunk creation.
 - Patch 7: In order to simplifies error flow and allows cleaner addition
   of new pools, handle creation/destruction of all the domain's memory pools
   and other memory-related fields in a separate init/uninit functions.
 - Patch 8: During rehash, write each table row immediately instead of waiting
   for the whole table to be ready and writing it all - saves allocations
   of ste_send_info structures and improves performance.
 - Patch 9: Instead of allocating/freeing send info objects dynamically,
   manage them in pool. The number of send info objects doesn't depend on
   number of rules, so after pre-populating the pool with an initial batch of
   send info objects, the pool is not expected to grow.
   This way we save alloc/free during writing STEs to ICM, which by itself can
   sometimes take up to 40msec.
 - Patch 10: Allocate icm_chunks from their own slab allocator, which lowered
   the alloc/free "hiccups" frequency.
 - Patch 11: Similar to patch 9, allocate htbl from its own slab allocator.
 - Patch 12: Lower sync threshold for ICM hot memory - set the threshold for
   sync to 1/4 of the pool instead of 1/2 of the pool. Although we will have
   more syncs, each     sync will be shorter and will help with insertion rate
   stability. Also, notice that the overall number of hiccups wasn't increased
   due to all the other patches.
 - Patch 13: Keep track of hot ICM chunks in an array instead of list.
   After steering sync, we traverse the hot list and finally free all the
   chunks. It appears that traversing a long list takes unusually long time
   due to cache misses on many entries, which causes a big "hiccup" during
   rule insertion. This patch replaces the list with pre-allocated array that
   stores only the bookkeeping information that is needed to later free the
   chunks in its buddy allocator.
 - Patch 14: Remove the unneeded buddy used_list - we don't need to have the
   list of used chunks, we only need the total amount of used memory.

* tag 'mlx5-updates-2022-10-24' of git://git.kernel.org/pub/scm/linux/kernel/git/saeed/linux:
  net/mlx5: DR, Remove the buddy used_list
  net/mlx5: DR, Keep track of hot ICM chunks in an array instead of list
  net/mlx5: DR, Lower sync threshold for ICM hot memory
  net/mlx5: DR, Allocate htbl from its own slab allocator
  net/mlx5: DR, Allocate icm_chunks from their own slab allocator
  net/mlx5: DR, Manage STE send info objects in pool
  net/mlx5: DR, In rehash write the line in the entry immediately
  net/mlx5: DR, Handle domain memory resources init/uninit separately
  net/mlx5: DR, Initialize chunk's ste_arrays at chunk creation
  net/mlx5: DR, For short chains of STEs, avoid allocating ste_arr dynamically
  net/mlx5: DR, Remove unneeded argument from dr_icm_chunk_destroy
  net/mlx5: DR, Check device state when polling CQ
  net/mlx5: DR, Fix the SMFS sync_steering for fast teardown
  net/mlx5: DR, In destroy flow, free resources even if FW command failed
====================

Link: https://lore.kernel.org/r/20221027145643.6618-1-saeed@kernel.orgSigned-off-by: Jakub Kicinski <kuba@kernel.org>

Alex Elder says:

====================
net: ipa: start adding IPA v5.0 functionality

The biggest change for IPA v5.0 is that it supports more than 32
endpoints.  However there are two other unrelated changes:
  - The STATS_TETHERING memory region is not required
  - Filter tables no longer support a "global" filter

Beyond this, refactoring some code makes supporting more than 32
endpoints (in an upcoming series) easier.  So this series includes
a few other changes (not in this order):
  - The maximum endpoint ID in use is determined during config
  - Loops over all endpoints only involve those in use
  - Endpoints IDs and their directions are checked for validity
    differently to simplify comparison against the maximum
====================

Link: https://lore.kernel.org/r/20221027122632.488694-1-elder@linaro.orgSigned-off-by: Jakub Kicinski <kuba@kernel.org>

Define a new field in the IPA structure that records the maximum
number of entries that will be used in the IPA endpoint array.  Use
that value rather than IPA_ENDPOINT_MAX to determine the end
condition for two loops that iterate over all endpoints.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Each endpoint ID has an entry in the IPA endpoint array.  But the
size of that array is defined at compile time.  Instead, rename
ipa_endpoint_data_valid() to be ipa_endpoint_max() and have it
return the maximum endpoint ID defined in configuration data.
That function will still validate configuration data.

Zero is returned on error; it's a valid endpoint ID, but we need
more than one, so it can't be the maximum.  The next patch makes use
of the returned maximum value.

Finally, rename the "initialized" mask of endpoints defined by
configuration data to be "defined".
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Change two functions that iterate over all endpoints to use while
loops, using "endpoint_id" as the index variables in both spots.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Ensure all defined TX endpoints are in the range [0, CONS_PIPES) and
defined RX endpoints are within [PROD_LOWEST, PROD_LOWEST+PROD_PIPES).

Modify the way local variables are used to make the checks easier
to understand.  Check for each endpoint being in valid range in the
loop, and drop the logical-AND check of initialized against
unavailable IDs.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

IPA v5.0 eliminates the global filter table entry.  As a result,
there is no need to shift the filtered endpoint bitmap when it is
written to IPA local memory.

Update comments to explain this.  Also delete a redundant block of
comments above the function.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Don't require IPA v5.0 to have a STATS_TETHERING memory region.
Downstream defines its size to 0, so it apparently is unused.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

In preparation for adding support for IPA v5.0, define it as an
understood version.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Extend packet socket option PACKET_IGNORE_OUTGOING to fanout groups.

The socket option sets ptype.ignore_outgoing, which makes
dev_queue_xmit_nit skip the socket.

When the socket joins a fanout group, the option is not reflected in
the struct ptype of the group. dev_queue_xmit_nit only tests the
fanout ptype, so the flag is ignored once a socket joins a
fanout group.

Inheriting the option from a socket would change established behavior.
Different sockets in the group can set different flags, and can also
change them at runtime.

Testing in packet_rcv_fanout defeats the purpose of the original
patch, which is to avoid skb_clone in dev_queue_xmit_nit (esp. for
MSG_ZEROCOPY packets).

Instead, introduce a new fanout group flag with the same behavior.

Tested with https://github.com/wdebruij/kerneltools/blob/master/tests/test_psock_fanout_ignore_outgoing.cSigned-off-by: Willem de Bruijn <willemb@google.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Link: https://lore.kernel.org/r/20221027211014.3581513-1-willemdebruijn.kernel@gmail.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

In the event of a Tx hang it can be useful to read a variety of hardware
registers to capture some state about why the transmit queue got stuck.

Extend the ETHTOOL_GREGS dump provided by the ice driver with several CSR
registers that provide such relevant information regarding the hardware Tx
state. This enables capturing relevant data to enable debugging such a Tx
hang.
Signed-off-by: Lukasz Czapnik <lukasz.czapnik@intel.com>
Signed-off-by: Mateusz Palczewski <mateusz.palczewski@intel.com>
Tested-by: Gurucharan <gurucharanx.g@intel.com> (A Contingent worker at Intel)
Link: https://lore.kernel.org/r/20221027104239.1691549-1-jacob.e.keller@intel.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

Russell King says:

====================
Clean up SFP register definitions

This two-part patch series cleans up the SFP register definitions by
1. converting them from hex to decimal, as all the definitions in the
   documents use decimal, this makes it easier to cross-reference.
2. moving the bit definitions for each register along side their
   register address definition
====================

Link: https://lore.kernel.org/r/Y1qFvaDlLVM1fHdG@shell.armlinux.org.ukSigned-off-by: Jakub Kicinski <kuba@kernel.org>

Just as we do for the A2h enum, arrange the A0h enum to have the
field definitions next to their corresponding register index.
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

The register indexes in the standards are in decimal rather than hex,
so lets specify them in decimal in the header file so we can easily
cross-reference without converting between hex and decimal.
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Russell King says:

====================
net: mtk_eth_soc: improve PCS implementation

As a result of invesigations from Frank Wunderlich, we know a lot more
about the Mediatek "SGMII" PCS block, and can implement the PCS support
correctly. This series achieves that, and Frank has tested the final
result and reports that it works for him. The series could do with
further testing by others, but I suspect that is unlikely to happen
until it is merged based on past performances with this driver.

Briefly, the patches in order:

1. Add a new helper to get the link timer duration in nanoseconds
2. Add definitions for the newly discovered registers and updates to
   bit definitions, including bitmasks for the BMCR, BMSR and two
   advertisement registers.
3. Remove unnecessary/unused error handling (functions always returning
   zero.)
4. Adding the missing pcs_get_state() implementation.
5. Converting the code to use regmap_update_bits() rather than
   open-coding read-modify-write sequences.
6. Adding out-of-band speed and duplex forcing for all non-inband modes
   not just the 802.3z link modes the code currently does.
7. Moving the release of the PHY power down to the main pcs_config()
   function.
8. Moving the interface speed selection to the main pcs_config()
   function.
9. Adding advertisement programming.
10. Adding correct link timer programming using the new helper in the
    first patch.
11. Adding support for 802.3z negotiation.

There is one remaining issue - when configuring the PCS for in-band,
for some reason the AN restart bit is always set. This should not be
necessary, but requires further investigation with the hardware to
find out whether it is really necessary. I suspect this was a work
around for a previous poor implementation.
====================

Link: https://lore.kernel.org/r/Y1qDMw+DJLAJHT40@shell.armlinux.org.ukSigned-off-by: Jakub Kicinski <kuba@kernel.org>

As a result of help from Frank Wunderlich to investigate and test, we
now know how to program this PCS for in-band 802.3z negotiation. Add
support for this by moving the contents of the two functions into the
common mtk_pcs_config() function and adding the register settings for
802.3z negotiation.
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Program the link timer appropriately for the interface mode being
used, using the newly introduced phylink helper that provides the
nanosecond link timer interval.

The intervals are 1.6ms for SGMII based protocols and 10ms for
802.3z based protocols.
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Program the advertisement into the mtk PCS block.
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Move the selection of the underlying interface speed to the pcs_config
function, so we always program the interface speed.
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

The PHY power up is common to both configuration paths, so move it into
the parent function. We need to do this for all serdes modes.
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Add support for forcing the link speed and duplex setting in the
pcs_link_up() method for out of band modes, which will be useful when
we finish converting the pcs_config() method. Until then, we still have
to force duplex for 802.3z modes to work correctly.
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

mtk_sgmii does a lot of read-modify-write operations, for which there
is a specific regmap function. Use this function instead of open-coding
the operations.
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>