Add two new helper functions to retrieve a mapping of priority to PCP
and DSCP bitmasks, where each bitmap contains ones in positions that
match a rewrite entry.

dcb_ieee_getrewr_prio_dscp_mask_map() reuses the dcb_ieee_app_prio_map,
as this struct is already used for a similar mapping in the app table.
Signed-off-by: Daniel Machon <daniel.machon@microchip.com>
Reviewed-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Add new rewrite table and all the required functions, offload hooks and
bookkeeping for maintaining it. The rewrite table reuses the app struct,
and the entire set of app selectors. As such, some bookeeping code can
be shared between the rewrite- and the APP table.

New functions for getting, setting and deleting entries has been added.
Apart from operating on the rewrite list, these functions do not emit a
DCB_APP_EVENT when the list os modified. The new dcb_getrewr does a
lookup based on selector and priority and returns the protocol, so that
mappings from priority to protocol, for a given selector and ifindex is
obtained.

Also, a new nested attribute has been added, that encapsulates one or
more app structs. This attribute is used to distinguish the two tables.

The dcb_lock used for the APP table is reused for the rewrite table.
Signed-off-by: Daniel Machon <daniel.machon@microchip.com>
Reviewed-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

In preparation for DCB rewrite. Add a new function for setting and
deleting both app and rewrite entries. Moving this into a separate
function reduces duplicate code, as both type of entries requires the
same set of checks. The function will now iterate through a configurable
nested attribute (app or rewrite attr), validate each attribute and call
the appropriate set- or delete function.

Note that this function always checks for nla_len(attr_itr) <
sizeof(struct dcb_app), which was only done in dcbnl_ieee_set and not in
dcbnl_ieee_del prior to this patch. This means, that any userspace tool
that used to shove in data < sizeof(struct dcb_app) would now receive
-ERANGE.
Signed-off-by: Daniel Machon <daniel.machon@microchip.com>
Reviewed-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

In preparation to DCB rewrite. Modify dcb_app_add to take new struct
list_head * as parameter, to make the used list configurable. This is
done to allow reusing the function for adding rewrite entries to the
rewrite table, which is introduced in a later patch.
Signed-off-by: Daniel Machon <daniel.machon@microchip.com>
Reviewed-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Jerry Ray says:

====================
dsa: lan9303: Move to PHYLINK

This patch series moves the lan9303 driver to use the phylink
api away from phylib.

Migrating to phylink means removing the .adjust_link api. The
functionality from the adjust_link is moved to the phylink_mac_link_up
api.  The code being removed only affected the cpu port.  The other
ports on the LAN9303 do not need anything from the phylink_mac_link_up
api.

Patches:
 0001 - Whitespace only change aligning the dsa_switch_ops members.
	No code changes.
 0002 - Moves the Turbo bit initialization out of the adjust_link api and
	places it in a driver initialization execution path. It only needs
	to be initialized once, it is never changed, and it is not a
	per-port flag.
 0003 - Adds exception handling logic in the extremely unlikely event that
	the read of the device fails.
 0004 - Performance optimization that skips a slow register write if there
	is no need to perform it.
 0005 - Change the way we identify the xMII port as phydev will be NULL
	when this logic is moved into phylink_mac_link_up.
 0006 - Removes adjust_link and begins using the phylink dsa_switch_ops
	apis.
 0007 - Adds XMII port flow control settings in the phylink_mac_link_up()
	api while cleaning up the ANEG / speed / duplex implementation.
---
v6->v7:
  - Moved the initialization of the Turbo bit into lan9303_setup().
  - Added a macro for determining is a port is an XMII port.
  - Added setting the XMII flow control in the phylink_mac_link_up() API.
  - removed unnecessary error handling and cleaned up the code flow in
    phylink_mac_link_up().
v5->v6:
  - Moved to using port number to identify xMII port for the LAN9303.
v4->v5:
  - Created prep patches to better show how things migrate.
  - cleaned up comments.
v3->v4:
  - Addressed whitespace issues as a separate patch.
  - Removed port_max_mtu api patch as it is unrelated to phylink migration.
  - Reworked the implementation to preserve the adjust_link functionality
    by including it in the phylink_mac_link_up api.
v2->v3:
  Added back in disabling Turbo Mode on the CPU MII interface.
  Removed the unnecessary clearing of the phy supported interfaces.
v1->v2:
  corrected the reported mtu size, removing ETH_HLEN and ETH_FCS_LEN
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

While the prior patch moved the adjust_link code into the
phylink_mac_link_up api, this patch cleans it up and adds the setting the
port's flow control based on the phylink_mac_link_up input parameters.
Signed-off-by: Jerry Ray <jerry.ray@microchip.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

This patch replaces the adjust_link api with the phylink apis that provide
equivalent functionality.

The remaining functionality from the adjust_link is now covered in the
phylink_mac_link_up api.

Removes:
.adjust_link
Adds:
.phylink_get_caps
.phylink_mac_link_up
Signed-off-by: Jerry Ray <jerry.ray@microchip.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

In preparing to move the adjust_link logic into the phylink_mac_link_up
api, change the macro used to check for the cpu port. In
phylink_mac_link_up, the phydev pointer passed in for the CPU port is
NULL, so we can't keep using phy_is_pseudo_fixed_link(phydev).
Signed-off-by: Jerry Ray <jerry.ray@microchip.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

As the regmap_write() is over a slow bus that will sleep, we can speed up
the boot-up time a bit by not bothering to clear a bit that is already
clear.
Signed-off-by: Jerry Ray <jerry.ray@microchip.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

While it is highly unlikely a read will ever fail, This code fragment is
now in a function that allows us to return an error code. A read failure
here will cause the lan9303_probe to fail.
Signed-off-by: Jerry Ray <jerry.ray@microchip.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

In preparing to remove the .adjust_link api, I am moving the one-time
initialization of the device's Turbo Mode bit into a different execution
path. This code clears (disables) the Turbo Mode bit which is never used
by this driver. Turbo Mode is a non-standard mode that would allow the
100Mbps RMII interface to run at 200Mbps.
Signed-off-by: Jerry Ray <jerry.ray@microchip.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Whitespace preparatory patch, making the dsa_switch_ops table consistent.
No code is added or removed.
Signed-off-by: Jerry Ray <jerry.ray@microchip.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Saeed Mahameed says:

====================
mlx5-updates-2023-01-18

1) From Rahul,
  1.1) extended range for PTP adjtime and adjphase
  1.2) adjphase function to support hardware-only offset control

2) From Roi, code cleanup to the TC module.

3) From Maor, TC support for Geneve and GRE with VF tunnel offload

4) Cleanups and minor updates.

* tag 'mlx5-updates-2023-01-18' of git://git.kernel.org/pub/scm/linux/kernel/git/saeed/linux:
  net/mlx5e: Use read lock for eswitch get callbacks
  net/mlx5e: Remove redundant allocation of spec in create indirect fwd group
  net/mlx5e: Support Geneve and GRE with VF tunnel offload
  net/mlx5: E-Switch, Fix typo for egress
  net/mlx5e: Warn when destroying mod hdr hash table that is not empty
  net/mlx5e: TC, Use common function allocating flow mod hdr or encap mod hdr
  net/mlx5e: TC, Add tc prefix to attach/detach hdr functions
  net/mlx5e: TC, Pass flow attr to attach/detach mod hdr functions
  net/mlx5e: Add warning when log WQE size is smaller than log stride size
  net/mlx5e: Fail with messages when params are not valid for XSK
  net/mlx5: E-switch, Remove redundant comment about meta rules
  net/mlx5: Add hardware extended range support for PTP adjtime and adjphase
  net/mlx5: Add adjphase function to support hardware-only offset control
  net/mlx5: Suppress error logging on UCTX creation
  net/mlx5e: Suppress Send WQEBB room warning for PAGE_SIZE >= 16KB
====================

Link: https://lore.kernel.org/r/20230118183602.124323-1-saeed@kernel.orgSigned-off-by: Jakub Kicinski <kuba@kernel.org>

Coverity reported the following:

*** CID 1530573:    (UNINIT)
drivers/net/phy/phy-c45.c:1036 in genphy_c45_plca_set_cfg()
1030     				return ret;
1031
1032     			val = ret;
1033     		}
1034
1035     		if (plca_cfg->node_cnt >= 0)
vvv     CID 1530573:    (UNINIT)
vvv     Using uninitialized value "val".
1036     			val = (val & ~MDIO_OATC14_PLCA_NCNT) |
1037     			      (plca_cfg->node_cnt << 8);
1038
1039     		if (plca_cfg->node_id >= 0)
1040     			val = (val & ~MDIO_OATC14_PLCA_ID) |
1041     			      (plca_cfg->node_id);
drivers/net/phy/phy-c45.c:1076 in genphy_c45_plca_set_cfg()
1070     				return ret;
1071
1072     			val = ret;
1073     		}
1074
1075     		if (plca_cfg->burst_cnt >= 0)
vvv     CID 1530573:    (UNINIT)
vvv     Using uninitialized value "val".
1076     			val = (val & ~MDIO_OATC14_PLCA_MAXBC) |
1077     			      (plca_cfg->burst_cnt << 8);
1078
1079     		if (plca_cfg->burst_tmr >= 0)
1080     			val = (val & ~MDIO_OATC14_PLCA_BTMR) |
1081     			      (plca_cfg->burst_tmr);

This is not actually creating a real problem because the path leading to
'val' being used uninitialized will eventually override the full content
of that variable before actually using it for writing the register.
However, the fix is simple and comes at basically no cost.
Reported-by: coverity-bot <keescook+coverity-bot@chromium.org>
Fixes: 49332341 ("drivers/net/phy: add helpers to get/set PLCA configuration")
Signed-off-by: Piergiorgio Beruto <piergiorgio.beruto@gmail.com>
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Link: https://lore.kernel.org/r/f22f1864165a8dbac8b7a2277f341bc8e7a7b70d.1674056765.git.piergiorgio.beruto@gmail.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

Jiri Pirko says:

====================
devlink: linecard and reporters locking cleanup

This patchset does not change functionality.

Patches 1-2 remove linecards lock and reference counting, converting
them to be protected by devlink instance lock as the rest of
the objects.

Patches 3-4 fix the mlx5 auxiliary device devlink locking scheme whis is
needed for proper reporters lock conversion done in the following
patches.

Patches 5-8 remove reporters locks and reference counting, converting
them to be protected by devlink instance lock as the rest of
the objects.

Patches 9 and 10 convert linecards and reporters dumpit callbacks to
recently introduced devlink_nl_instance_iter_dump() infra.

Patch 11 removes no longer needed devlink_dump_for_each_instance_get()
helper.

The last patch adds assertion to devl_is_registered() as dependency on
other locks is removed.
====================

Link: https://lore.kernel.org/r/20230118152115.1113149-1-jiri@resnulli.usSigned-off-by: Jakub Kicinski <kuba@kernel.org>

After region and linecard lock removals, this helper is always supposed
to be called with instance lock held. So put the assertion here and
remove the comment which is no longer accurate.
Signed-off-by: Jiri Pirko <jiri@nvidia.com>
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

devlink_dump_for_each_instance_get() is currently called from
a single place in netlink.c. As there is no need to use
this helper anywhere else in the future, remove it and
call devlinks_xa_find_get() directly from while loop
in devlink_nl_instance_iter_dump(). Also remove redundant
idx clear on loop end as it is already done
in devlink_nl_instance_iter_dump().
Signed-off-by: Jiri Pirko <jiri@nvidia.com>
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Benefit from recently introduced instance iteration and convert
reporters .dumpit generic netlink callback to use it.
Signed-off-by: Jiri Pirko <jiri@nvidia.com>
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Benefit from recently introduced instance iteration and convert
linecards .dumpit generic netlink callback to use it.
Signed-off-by: Jiri Pirko <jiri@nvidia.com>
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

As long as the reporter life time is protected by devlink instance
lock, the reference counting is no longer needed. Remove it.
Signed-off-by: Jiri Pirko <jiri@nvidia.com>
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Remove port-specific health reporter destroy function as it is
currently the same as the instance one so no longer needed. Inline
__devlink_health_reporter_destroy() as it is no longer called from
multiple places.
Signed-off-by: Jiri Pirko <jiri@nvidia.com>
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Similar to other devlink objects, rely on devlink instance lock
and remove object specific reporters_lock.
Signed-off-by: Jiri Pirko <jiri@nvidia.com>
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Similar to other devlink objects, protect the reporters list
by devlink instance lock. Alongside add unlocked versions
of health reporter create/destroy functions and use them in drivers
on call paths where the instance lock is held.
Signed-off-by: Jiri Pirko <jiri@nvidia.com>
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

The MLX5E_LOCKED_FLOW flag is not checked anywhere now so remove it
entirely.
Signed-off-by: Jiri Pirko <jiri@nvidia.com>
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

The fact that devlink instance lock is held over mlx5 auxiliary devices
probe and remove routines brought a need to conditionally take devlink
instance lock there. The code is checking a MLX5E_LOCKED_FLOW flag
in mlx5 priv struct.

This is racy and may lead to access devlink objects without holding
instance lock or deadlock.

To avoid this, the only lock-wise sane solution is to make the
devlink entities created by the auxiliary device independent on
the original pci devlink instance. Create devlink instance for the
auxiliary device and put the uplink port instance there alongside with
the port health reporters.
Signed-off-by: Jiri Pirko <jiri@nvidia.com>
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

As long as the linecard life time is protected by devlink instance
lock, the reference counting is no longer needed. Remove it.
Signed-off-by: Jiri Pirko <jiri@nvidia.com>
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Similar to other devlink objects, convert the linecards list to be
protected by devlink instance lock. Alongside with that rename the
create/destroy() functions to devl_* to indicate the devlink instance
lock needs to be held while calling them.
Signed-off-by: Jiri Pirko <jiri@nvidia.com>
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

In the am65_cpsw_init_serdes_phy() function, the error handling for the
call to the devm_of_phy_get() function misses the case where the return
value of devm_of_phy_get() is ERR_PTR(-EPROBE_DEFER). Proceeding without
handling this case will result in a crash when the "phy" pointer with
this value is dereferenced by phy_init() in am65_cpsw_enable_phy().

Fix this by adding appropriate error handling code.
Reported-by: Geert Uytterhoeven <geert@linux-m68k.org>
Fixes: dab2b265 ("net: ethernet: ti: am65-cpsw: Add support for SERDES configuration")
Suggested-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Siddharth Vadapalli <s-vadapalli@ti.com>
Reviewed-by: Roger Quadros <rogerq@kernel.org>
Link: https://lore.kernel.org/r/20230118112136.213061-1-s-vadapalli@ti.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

We want to return negative error codes here but the copy_to/from_user()
functions return the number of bytes remaining to be copied.

Fixes: c59e12a1 ("net: dsa: microchip: ptp: Initial hardware time stamping support")
Signed-off-by: Dan Carpenter <error27@gmail.com>
Reviewed-by: Vladimir Oltean <olteanv@gmail.com>
Link: https://lore.kernel.org/r/Y8fJxSvbl7UNVHh/@kiliSigned-off-by: Jakub Kicinski <kuba@kernel.org>

Russell King says:

====================
net: sfp: cleanup i2c / dt / acpi / fwnode / includes

This series cleans up the DT/fwnode/ACPI code in the SFP cage driver:

1. Use the newly introduced i2c_get_adapter_by_fwnode(), which removes
the need to know about ACPI handles to find the I2C device.

2. Use device_get_match_data() to get the match data, rather than
having to look up the matching DT device_id to get at the data.

3. Rename gpio_of_names, as this is not DT specific.

4. Remove acpi.h include which is no longer necessary.

5. Remove ctype.h include which, as far as I can tell, was never
necessary.
====================

Link: https://lore.kernel.org/r/Y8fH+Vqx6huYQFDU@shell.armlinux.org.ukSigned-off-by: Jakub Kicinski <kuba@kernel.org>

An include of linux/ctype.h was added in commit 1323061a
("net: phy: sfp: Add HWMON support for module sensors") but nothing
was used from this header file. Remove this unnecessary include.
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Nothing in the sfp code now references anything from the ACPI header,
everything is done via fwnode APIs, so get rid of this header.
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

There's nothing DT specific about the gpio_of_names array, let's drop
the _of infix.
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Rather than using of_match_node() to get the matching of_device_id
to then retrieve the match data, use device_get_match_data() instead
to avoid firmware specific functions, and free the driver from having
firmware specific code.
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Use the newly introduced i2c_get_adapter_by_fwnode() API, so that we
can retrieve the I2C adapter in a firmware independent manner once we
have the fwnode handle for the adapter.
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Michael Walle says:

====================
net: phy: Remove probe_capabilities

With all the drivers which used .probe_capabilities converted to the
new c45 MDIO access methods, we can now decide based upon these whether
a bus driver supports c45 and we can get rid of the not widely used
probe_capabilites.

Unfortunately, due to a now broader support of c45 scans, this will
trigger a bug on some boards with a (c22-only) Micrel PHY. These PHYs
don't ignore c45 accesses correctly, thinking they are addressed
themselves and distrupt the MDIO access. To avoid this, a blacklist
for c45 scans is introduced.
====================

Link: https://lore.kernel.org/r/20230116-net-next-remove-probe-capabilities-v2-0-15513b05e1f4@walle.ccSigned-off-by: Paolo Abeni <pabeni@redhat.com>

Deciding if to probe of PHYs using C45 is now determine by if the bus
provides the C45 read method. This makes probe_capabilities redundant
so remove it.
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Michael Walle <michael@walle.cc>
Reviewed-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Acked-by: Andrew Jeffery <andrew@aj.id.au>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

Some PHYs provide invalid IDs in C22 space. If C45 is supported on the
bus an attempt can be made to get the IDs from the C45 space. Decide
on this based on the presence of the C45 read method in the bus
structure. This will allow the unreliable probe_capabilities to be
removed.
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Michael Walle <michael@walle.cc>
Reviewed-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

Now that all MDIO bus drivers which set probe_capabilities to
MDIOBUS_C22_C45 have been converted to use the name API for C45
transactions, perform the scanning of the bus based on which methods
the bus provides.
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Michael Walle <michael@walle.cc>
Reviewed-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

After scanning the bus for C22 devices, check if any Micrel PHYs have
been found.  They are known to do bad things if there are C45
transactions on the bus. Prevent the scanning of the bus using C45 if
such a PHY has been detected.
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Michael Walle <michael@walle.cc>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>