Move the param registration and handling code into the fw reset code
as they are related to each other. No point in having the devlink param
registration done in separate file.
Signed-off-by: Jiri Pirko <jiri@nvidia.com>
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Commit 1d18bb1a ("devlink: allow registering parameters after
the instance") as the subject implies introduced possibility to register
devlink params even for already registered devlink instance. This is a
bit problematic, as the consistency or params list was originally
secured by the fact it is static during devlink lifetime. So in order to
protect the params list, take devlink instance lock during the params
operations. Introduce unlocked function variants and use them in drivers
in locked context. Put lock assertions to appropriate places.
Signed-off-by: Jiri Pirko <jiri@nvidia.com>
Reviewed-by: Jakub Kicinski <kuba@kernel.org>
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: Simon Horman <simon.horman@corigine.com>
Tested-by: Simon Horman <simon.horman@corigine.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Put couple of WARN_ONs in devlink_param_driverinit_value_get() function
to clearly indicate, that it is a driver bug if used without reload
support or for non-driverinit param.
Signed-off-by: Jiri Pirko <jiri@nvidia.com>
Reviewed-by: Jakub Kicinski <kuba@kernel.org>
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

devlink_param_driverinit_value_set() currently returns int with possible
error, but no user is checking it anyway. The only reason for a fail is
a driver bug. So convert the function to return void and put WARN_ONs
on error paths.
Signed-off-by: Jiri Pirko <jiri@nvidia.com>
Reviewed-by: Jakub Kicinski <kuba@kernel.org>
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

devlink_param_driverinit_value_set() call makes sense only for "
driverinit" params. However here, the param is "runtime".
devlink_param_driverinit_value_set() returns -EOPNOTSUPP in such case
and does not do anything. So remove the pointless call to
devlink_param_driverinit_value_set() entirely.
Signed-off-by: Jiri Pirko <jiri@nvidia.com>
Reviewed-by: Jakub Kicinski <kuba@kernel.org>
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

devlink_param_driverinit_value_set() call makes sense only for
"driverinit" params. However here, both params are "runtime".
devlink_param_driverinit_value_set() returns -EOPNOTSUPP in such case
and does not do anything. So remove the pointless calls to
devlink_param_driverinit_value_set() entirely.
Signed-off-by: Jiri Pirko <jiri@nvidia.com>
Reviewed-by: Jakub Kicinski <kuba@kernel.org>
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

There is a WARN_ON checking the param_item for being NULL when the param
is not inserted in the list. That indicates a driver BUG. Instead of
continuing to work with NULL pointer with its consequences, return.
Signed-off-by: Jiri Pirko <jiri@nvidia.com>
Reviewed-by: Jakub Kicinski <kuba@kernel.org>
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

There is no user outside the devlink code, so remove the export and make
the functions static. Move them before callers to avoid forward
declarations.
Signed-off-by: Jiri Pirko <jiri@nvidia.com>
Reviewed-by: Jakub Kicinski <kuba@kernel.org>
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Since mlx5 is the only user of devlink API to register/unregister a
single param, convert it to use array registration function allowing to
simplify the devlink API by removing the single param registration
functions.
Signed-off-by: Jiri Pirko <jiri@nvidia.com>
Reviewed-by: Jakub Kicinski <kuba@kernel.org>
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

The functions are registering and unregistering devlink params, so
change the names accordingly.
Signed-off-by: Jiri Pirko <jiri@nvidia.com>
Reviewed-by: Jakub Kicinski <kuba@kernel.org>
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Jakub Kicinski says:

====================
ethtool: netlink: handle SET intro/outro in the common code

Factor out the boilerplate code from SET handlers to common code.

I volunteered to refactor the extack in GET in a conversation
with Vladimir but I gave up.

The handling of failures during dump in GET handlers is a bit
unclear to me. Some code uses presence of info as indication
of dump and tries to avoid reporting errors altogether
(including extack messages).

There's also the question of whether we should have a validation
callback (similar to .set_validate here) for GET. It looks like
.parse_request was expected to perform the validation. It takes
the extack and tb directly, not via info:

	int (*parse_request)(struct ethnl_req_info *req_info,
			     struct nlattr **tb,
			     struct netlink_ext_ack *extack);

	int (*prepare_data)(const struct ethnl_req_info *req_info,
			    struct ethnl_reply_data *reply_data,
			    struct genl_info *info);

so no crashes dereferencing info possible.

But .parse_request doesn't run under rtnl nor ethnl_ops_begin().
As a result some implementations defer validation until .prepare_data
where all the locks are held and they can call out to the driver.

All this makes me think that maybe we should refactor GET in the
same direction I'm refactoring SET. Split .prepare_data, take
more locks in the core, and add a validation helper which would
take extack directly:

    - ret = ops->prepare_data(req_info, reply_data, info);
    + ret = ops->prepare_data_validate(req_info, reply_data, attrs, extack);
    + if (ret < 1) // if 0 -> skip for dump; -EOPNOTSUPP in do
    +   goto err1;
    +
    + ret = ethnl_ops_begin(dev);
    + if (ret)
    +   goto err1;
    +
    + ret = ops->prepare_data(req_info, reply_data); // no extack
    + ethnl_ops_complete(dev);

I'll file that away as a TODO for posterity / older me.

v2:
 - invert checks for coalescing to avoid error code changes
 - rebase and convert MM as well

v1: https://lore.kernel.org/all/20230121054430.642280-1-kuba@kernel.org/
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

Convert all SET commands where new common code is applicable.
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

Most ethtool SET callbacks follow the same general structure.

  ethnl_parse_header_dev_get()
  rtnl_lock()
  ethnl_ops_begin()

  ... do stuff ...

  ethtool_notify()
  ethnl_ops_complete()
  rtnl_unlock()
  ethnl_parse_header_dev_put()

This leads to a lot of copy / pasted code an bugs when people
mis-handle the error path.

Add a generic implementation of this pattern with a .set callback
in struct ethnl_request_ops called to "do stuff".

Also add an optional .set_validate which is called before
ethnl_ops_begin() -- a lot of implementations do basic request
capability / sanity checking at that point.

Because we want to avoid generating the notification when
no change happened - adopt a slightly hairy return values:
 - 0 means nothing to do (no notification)
 - 1 means done / continue
 - negative error codes on error

Reuse .hdr_attr from struct ethnl_request_ops, GET and SET
use the same attr spaces in all cases.

Convert pause as an example (and to avoid unused function warnings).
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

Convert qca8k to regmap read/write bulk API. The mgmt eth can write up
to 32 bytes of data at times. Currently we use a custom function to do
it but regmap now supports declaration of read/write bulk even without a
bus.

Drop the custom function and rework the regmap function to this new
implementation.

Rework the qca8k_fdb_read/write function to use the new
regmap_bulk_read/write as the old qca8k_bulk_read/write are now dropped.

Cc: Mark Brown <broonie@kernel.org>
Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Add and use QCA8K_ATU_TABLE_SIZE instead of hardcoding the ATU size with
a pure number and using sizeof on the array.
Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Jakub Kicinski says:

====================
net: skbuff: clean up unnecessary includes

skbuff.h is included in a significant portion of the tree.
Clean up unused dependencies to speed up builds.

This set only takes care of the most obvious cases.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

This file is included by a lot of other commonly included
headers, it doesn't need socket.h or flow_dissector.h.

This reduces the size of this file after pre-processing
from 28165 to 4663.
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

linux/hrtimer.h include was added because apparently it used
to contain ktime related code. This is no longer the case
and we include linux/time.h explicitly.

Sadly this change is currently a noop because linux/dma-mapping.h
and net/page_pool.h pull in half of the universe.
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

splice.h is included since commit a60e3cc7 ("net: make
skb_splice_bits more configureable") but really even then
all we needed is some forward declarations. Most of that
code is now gone, and remaining has fwd declarations.
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

Number of files depend on linux/splice.h getting included
by linux/skbuff.h which soon will no longer be the case.
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

linux/sched.h was added for skb_mstamp_* (all the way back
before linux/sched.h got split and linux/sched/clock.h created).
We don't need it in skbuff.h any more.

Sadly this change is currently a noop because linux/dma-mapping.h
and net/page_pool.h pull in half of the universe.
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

It used to be necessary for skb_mstamp_* static inlines,
but those are gone since we moved to usec timestamps in
TCP, in 2017.
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

Number of files depend on linux/sched/clock.h getting included
by linux/skbuff.h which soon will no longer be the case.
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

This include was added for skb_find_text() but all we need there
is a forward declaration of struct ts_config.
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/checksum.h pulls in linux/uaccess.h which is large.

In the x86 header the include seems to not be needed at all.
ARM on the other hand does not include uaccess.h, even tho
it calls access_ok().

In the generic implementation guard the include of linux/uaccess.h
with the same condition as the code that needs it.

With this change pre-processed net/checksum.h shrinks on x86
from 30616 lines to just 1193.
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

It appears nothing needs it. The kernel builds fine with this
include removed, building an otherwise empty source file with:

 #include <linux/skbuff.h>
 #ifdef _LINUX_NET_H
 #error linux/net.h is back
 #endif

works too (meaning net.h is not just pulled in indirectly).

This gives us a slight 0.5% reduction in the pre-processed size
of skbuff.h.
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

linux/net.h will soon not be included by linux/skbuff.h.
Fix the cases where source files were depending on the implicit
include.
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

Alex Elder says:

====================
net: ipa: abstract status parsing

Under some circumstances, IPA generates a "packet status" structure
that describes information about a packet.  This is used, for
example, when offload hardware detects an error in a packet, or
otherwise discovers a packet needs special handling.  In this case,
the status is delivered (along with the packet it describes) to a
"default" endpoint so that it can be handled by the AP.

Until now, the structure of this status information hasn't changed.
However, to support more than 32 endpoints, this structure required
some changes, such that some fields are rearranged in ways that are
tricky to represent using C code.

This series updates code related to the IPA status structure.  The
first patch uses a local variable to avoid recomputing a packet
length more than once.  The second stops using sizeof() to determine
the size of an IPA packet status structure.  Patches 3-5 extend the
definitions for values held in packet status fields.  Patch 6 does a
little general cleanup to make patch 7 simpler.  Patch 7 stops using
a C structure to represent packet status; instead, a new function
fetches values "by name" from a buffer containing such a structure.
The last patch updates this function so it also supports IPA v5.0+.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

Update ipa_status_extract() to support IPA v5.0 and beyond.  Because
the format of the IPA packet status depends on the version, pass an
IPA pointer to the function.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

Stop assuming the IPA packet status has a fixed format (defined by
a C structure).  Instead, use a function to extract each field from
a block of data interpreted as an IPA packet status.  Define an
enumerated type that identifies the fields that can be extracted.
The current function extracts fields based on the existing
ipa_status structure format (which is no longer used).

Define IPA_STATUS_RULE_MISS, to replace the calls to field_max() to
represent that condition; those depended on the knowing the width of
a filter or router rule in the IPA packet status structure.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

The next patch reworks how the IPA packet status structure is
interpreted.  This patch does some preparatory work, to make it
easier to see the effect of that change:
  - Change a few functions that access fields in a IPA packet status
    structure to store field values in local variables with names
    related to the field.
  - Pass a void pointer rather than an (equivalent) status pointer
    to two functions called by ipa_endpoint_status_parse().
  - Use "rule" rather than "val" as the name of a variable that
    holds a routing rule ID.
  - Consistently use "IPA packet status" rather than "status
    element" when referring to this data structure.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

Define the remaining values for opcode and exception fields in the
IPA packet status structure.  Most of these values are powers-of-2,
suggesting they are meant to be used as bitmasks, but that is not
the case.  Add comments to be clear about this, and express the
values in decimal format.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

Rename the ipa_nat_en enumerated type to be ipa_nat_type, and rename
its symbols accordingly.  Add a comment indicating those values are
also used in the IPA status nat_type field.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

There is a 16 bit status mask defined in the IPA packet status
structure, of which only one (TAG_VALID) is currently used.

Define all other IPA status mask values in an enumerated type whose
numeric values are bit mask values (in CPU byte order) in the status
mask.  Use the TAG_VALID value from that type rather than defining a
separate field mask.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

The IPA packet status structure changes in IPA v5.0 in ways that are
difficult to represent cleanly.  As a small step toward redefining
it as a parsed block of data, use a constant to define its size,
rather than the size of the IPA status structure type.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

The packet length encoded in an IPA packet status buffer is computed
more than once in ipa_endpoint_status_parse().  It is also checked
again in ipa_endpoint_status_skip(), which that function calls.

Compute the length once, and use that computed value later rather
than recomputing it.  Check for it being zero in the parse function
rather than in ipa_endpoint_status_skip().
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

The build system currently complains:

scripts/Makefile.build:252: drivers/net/dsa/ocelot/Makefile:
felix.o is added to multiple modules: mscc_felix mscc_seville

Since felix.c holds the DSA glue layer, create a mscc_felix_dsa_lib.ko.
This is similar to how mscc_ocelot_switch_lib.ko holds a library for
configuring the hardware.
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Acked-by: Colin Foster <colin.foster@in-advantage.com>
Link: https://lore.kernel.org/r/20230125145716.271355-1-vladimir.oltean@nxp.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

Tony Nguyen says:

====================
virtchnl: update and refactor

Jesse Brandeburg says:

The virtchnl.h file is used by i40e/ice physical function (PF) drivers
and irdma when talking to the iavf driver. This series cleans up the
header file by removing unused elements, adding/cleaning some comments,
fixing the data structures so they are explicitly defined, including
padding, and finally does a long overdue rename of the IWARP members in
the structures to RDMA, since the ice driver and it's associated Intel
Ethernet E800 series adapters support both RDMA and IWARP.

The whole series should result in no functional change, but hopefully
clearer code.

* '40GbE' of git://git.kernel.org/pub/scm/linux/kernel/git/tnguy/next-queue:
  virtchnl: i40e/iavf: rename iwarp to rdma
  virtchnl: do structure hardening
  virtchnl: update header and increase header clarity
  virtchnl: remove unused structure declaration
====================

Link: https://lore.kernel.org/r/20230125212441.4030014-1-anthony.l.nguyen@intel.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

Jakub Kicinski says:

====================
tools: ynl: prevent reorder and fix flags

Some codegen improvements for YAML specs.

First, Lorenzon discovered when switching the XDP feature family
to use flags instead of pure enum that the kdoc got garbled.
The support for enum and flags is therefore unified.

Second when regenerating all families we discussed so far I noticed
that some netlink policies jumped around. We need to ensure we don't
render code based on their ordering in a hash.
====================

Link: https://lore.kernel.org/r/20230126000235.1085551-1-kuba@kernel.orgSigned-off-by: Jakub Kicinski <kuba@kernel.org>

When rendering code we should walk the ops in the order in which
they are declared in the spec. This is both more intuitive and
prevents code from jumping around when hashing in the dict changes.
Signed-off-by: Jakub Kicinski <kuba@kernel.org>