mlxsw: core_hwmon: Adjust module label names based on MTCAP sensor counter

Transceiver module temperature sensors are indexed after ASIC and
platform sensors. The current label printing method does

mlxsw: core_hwmon: Adjust module label names based on MTCAP sensor counter

Transceiver module temperature sensors are indexed after ASIC and
platform sensors. The current label printing method does not take this
into account and simply prints the index of the transceiver module
sensor.

On new systems that have platform sensors this results in incorrect
(shifted) transceiver module labels being printed:

$ sensors
[...]
front panel 002: +37.0°C (crit = +70.0°C, emerg = +75.0°C)
front panel 003: +47.0°C (crit = +70.0°C, emerg = +75.0°C)
[...]

Fix by taking the sensor count into account. After the fix:

$ sensors
[...]
front panel 001: +37.0°C (crit = +70.0°C, emerg = +75.0°C)
front panel 002: +47.0°C (crit = +70.0°C, emerg = +75.0°C)
[...]

Fixes: a53779de6a0e ("mlxsw: core: Add QSFP module temperature label attribute to hwmon")
Signed-off-by: Vadim Pasternak <vadimp@nvidia.com>
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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mlxsw: core_hwmon: Add interfaces for line card initialization and de-initialization

Add callback functions for line card 'hwmon' initialization and
de-initialization. Each line card is associated w

mlxsw: core_hwmon: Add interfaces for line card initialization and de-initialization

Add callback functions for line card 'hwmon' initialization and
de-initialization. Each line card is associated with the relevant
'hwmon' device, which may contain thermal attributes for the cages
and gearboxes found on this line card.

The line card 'hwmon' initialization / de-initialization APIs are to be
called when line card is set to active / inactive state by
got_active() / got_inactive() callbacks from line card state machine.

For example cage temperature for module #9 located at line card #7 will
be exposed by utility 'sensors' like:
linecard#07
front panel 009: +32.0C (crit = +70.0C, emerg = +80.0C)
And temperature for gearbox #3 located at line card #5 will be exposed
like:
linecard#05
gearbox 003: +41.0C (highest = +41.0C)

Signed-off-by: Vadim Pasternak <vadimp@nvidia.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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mlxsw: core_hwmon: Introduce slot parameter in hwmon interfaces

Add 'slot' parameter to 'mlxsw_hwmon_dev' structure. Use this parameter
in mlxsw_reg_mtmp_pack(), mlxsw_reg_mtbr_pack(), mlxsw_reg_mgp

mlxsw: core_hwmon: Introduce slot parameter in hwmon interfaces

Add 'slot' parameter to 'mlxsw_hwmon_dev' structure. Use this parameter
in mlxsw_reg_mtmp_pack(), mlxsw_reg_mtbr_pack(), mlxsw_reg_mgpir_pack()
and mlxsw_reg_mtmp_slot_index_set() routines.
For main board it'll always be zero, for line cards it'll be set to
the physical slot number in modular systems.

Signed-off-by: Vadim Pasternak <vadimp@nvidia.com>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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mlxsw: core_hwmon: Extend internal structures to support multi hwmon objects

Currently, mlxsw supports a single hwmon device and registers it with
attributes corresponding to the various objects fou

mlxsw: core_hwmon: Extend internal structures to support multi hwmon objects

Currently, mlxsw supports a single hwmon device and registers it with
attributes corresponding to the various objects found on the main
board such as fans and gearboxes.

Line cards can have the same objects, but unlike the main board they
can be added and removed while the system is running. The various
hwmon objects found on these line cards should be created when the
line card becomes available and destroyed when the line card becomes
unavailable.

The above can be achieved by representing each line card as a
different hwmon device and registering / unregistering it when the
line card becomes available / unavailable.

Prepare for multi hwmon device support by splitting
'struct mlxsw_hwmon' into 'struct mlxsw_hwmon' and
'struct mlxsw_hwmon_dev'. The first will hold information relevant to
all hwmon devices, whereas the second will hold per-hwmon device
information.

Signed-off-by: Vadim Pasternak <vadimp@nvidia.com>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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mlxsw: core: Extend interfaces for cable info access with slot argument

Extend all cable info APIs with 'slot_index' argument.

For main board, slot will always be set to zero and these APIs will wo

mlxsw: core: Extend interfaces for cable info access with slot argument

Extend all cable info APIs with 'slot_index' argument.

For main board, slot will always be set to zero and these APIs will work
as before. If reading cable information is required from cages located
on line cards, slot should be set to the physical slot number, where
line card is located in modular systems.

Signed-off-by: Vadim Pasternak <vadimp@nvidia.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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mlxsw: reg: Extend MGPIR register with new slot fields

Extend MGPIR (Management General Peripheral Information Register) with
new fields specifying the slot number and number of the slots available

mlxsw: reg: Extend MGPIR register with new slot fields

Extend MGPIR (Management General Peripheral Information Register) with
new fields specifying the slot number and number of the slots available
on system. The purpose of these fields is:
- to support access to MPGIR register on modular system for getting the
number of cages, equipped on the line card, inserted at specified
slot. In case slot number is set zero, MGPIR will provide the
information for the main board. For Top of the Rack (non-modular)
system it will provide the same as before.
- to provide the number of slots supported by system. This data is
relevant only in case slot number is set zero.

Signed-off-by: Vadim Pasternak <vadimp@nvidia.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

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mlxsw: reg: Extend MTBR register with new slot number field

Extend MTBR (Management Temperature Bulk Register) with new field
specifying the slot number. The purpose of this field is to support
acce

mlxsw: reg: Extend MTBR register with new slot number field

Extend MTBR (Management Temperature Bulk Register) with new field
specifying the slot number. The purpose of this field is to support
access to MTBR register for reading temperature sensors on modular
system. For non-modular systems the 'sensor_index' uniquely identifies
the cage sensors. For modular systems the sensors are identified by two
indexes:
- 'slot_index', specifying the slot number, where line card is located;
- 'sensor_index', specifying cage sensor within the line card.

Signed-off-by: Vadim Pasternak <vadimp@nvidia.com>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

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mlxsw: reg: Extend MTMP register with new slot number field

Extend MTMP (Management Temperature Register) with new field specifying
the slot index. The purpose of this field is to support access to

mlxsw: reg: Extend MTMP register with new slot number field

Extend MTMP (Management Temperature Register) with new field specifying
the slot index. The purpose of this field is to support access to MTMP
register for reading temperature sensors on modular systems.
For non-modular systems the 'sensor_index' uniquely identifies the cage
sensors, while 'slot_index' is always 0. For modular systems the
sensors are identified by:
- 'slot_index', specifying the slot index, where line card is located;
- 'sensor_index', specifying cage sensor within the line card.

Signed-off-by: Vadim Pasternak <vadimp@nvidia.com>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

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mlxsw: core_thermal: Remove obsolete API for query resource

Remove obsolete API mlxsw_core_res_query_enabled(), which is only
relevant for end-of-life SwitchX-2 ASICs. Support for these ASICs was
re

mlxsw: core_thermal: Remove obsolete API for query resource

Remove obsolete API mlxsw_core_res_query_enabled(), which is only
relevant for end-of-life SwitchX-2 ASICs. Support for these ASICs was
removed in commit b0d80c013b04 ("mlxsw: Remove Mellanox SwitchX-2 ASIC
support").

Signed-off-by: Vadim Pasternak <vadimp@nvidia.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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mlxsw: core_hwmon: Fix variable names for hwmon attributes

Replace all local variables 'mlwsw_hwmon_attr' by 'mlxsw_hwmon_attr'.
All variable prefixes should start with 'mlxsw' according to the nami

mlxsw: core_hwmon: Fix variable names for hwmon attributes

Replace all local variables 'mlwsw_hwmon_attr' by 'mlxsw_hwmon_attr'.
All variable prefixes should start with 'mlxsw' according to the naming
convention, so 'mlwsw' is changed to 'mlxsw'.

Signed-off-by: Vadim Pasternak <vadimp@nvidia.com>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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mlxsw: reg: Extend MTMP register with new threshold field

Extend Management Temperature (MTMP) register with new field specifying
the maximum temperature threshold.

Extend mlxsw_reg_mtmp_unpack() f

mlxsw: reg: Extend MTMP register with new threshold field

Extend Management Temperature (MTMP) register with new field specifying
the maximum temperature threshold.

Extend mlxsw_reg_mtmp_unpack() function with two extra arguments,
providing high and maximum temperature thresholds. For modules, these
thresholds correspond to critical and emergency thresholds that are read
from the module's EEPROM.

Signed-off-by: Mykola Kostenok <c_mykolak@nvidia.com>
Acked-by: Vadim Pasternak <vadimp@nvidia.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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mlxsw: core_hwmon: Query MTMP before writing to set only relevant fields

The MTMP register controls various temperature settings on a per-sensor
basis. Subsequent patches are going to alter some of

mlxsw: core_hwmon: Query MTMP before writing to set only relevant fields

The MTMP register controls various temperature settings on a per-sensor
basis. Subsequent patches are going to alter some of these settings for
sensors found on port modules in response to certain events.

In order to prevent the current callers that write to MTMP from
overriding these settings, have them first query the register and then
change only the relevant register fields.

Signed-off-by: Amit Cohen <amcohen@nvidia.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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mlxsw: core_hwmon: Extend hwmon interface with critical and emergency alarms

Add new attributes to hwmon object for exposing critical and emergency
alarms.

In case that current temperature is highe

mlxsw: core_hwmon: Extend hwmon interface with critical and emergency alarms

Add new attributes to hwmon object for exposing critical and emergency
alarms.

In case that current temperature is higher than emergency threshold,
EMERGENCY alarm will be reported in sensors utility:

$ sensors
...
front panel 025: +55.0°C (crit = +35.0°C, emerg = +40.0°C) ALARM(EMERGENCY)

In case that current temperature is higher than critical threshold,
CRIT alarm will be reported in sensors utility:

$ sensors
...
front panel 025: +54.0°C (crit = +35.0°C, emerg = +80.0°C) ALARM(CRIT)

Signed-off-by: Amit Cohen <amitc@mellanox.com>
Reviewed-by: Petr Machata <petrm@mellanox.com>
Acked-by: Vadim Pasternak <vadimp@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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mlxsw: core_hwmon: Calculate MLXSW_HWMON_ATTR_COUNT more accurately

Currently the value of MLXSW_HWMON_ATTR_COUNT is calculated not really
accurate.

Add several defines to make the calculation clea

mlxsw: core_hwmon: Calculate MLXSW_HWMON_ATTR_COUNT more accurately

Currently the value of MLXSW_HWMON_ATTR_COUNT is calculated not really
accurate.

Add several defines to make the calculation clearer and easier to
change.

Calculate the precise high bound of number of attributes that may be
needed.

Signed-off-by: Amit Cohen <amitc@mellanox.com>
Reviewed-by: Petr Machata <petrm@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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mlxsw: core_hwmon: Split temperature querying from show functions

mlxsw_hwmon_module_temp_show(), mlxsw_hwmon_module_temp_critical_show()
and mlxsw_hwmon_module_temp_emergency_show() query the relev

mlxsw: core_hwmon: Split temperature querying from show functions

mlxsw_hwmon_module_temp_show(), mlxsw_hwmon_module_temp_critical_show()
and mlxsw_hwmon_module_temp_emergency_show() query the relevant
temperature from firmware and fill the value in provided buffers.

Split the temperature querying functionality to individual get()
functions and call them from the show() functions.

The get() functions will be used by subsequent patches in the set.

Signed-off-by: Amit Cohen <amitc@mellanox.com>
Reviewed-by: Petr Machata <petrm@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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treewide: Use fallthrough pseudo-keyword

Replace the existing /* fall through */ comments and its variants with
the new pseudo-keyword macro fallthrough[1]. Also, remove unnecessary
fall-through mar

treewide: Use fallthrough pseudo-keyword

Replace the existing /* fall through */ comments and its variants with
the new pseudo-keyword macro fallthrough[1]. Also, remove unnecessary
fall-through markings when it is the case.

[1] https://www.kernel.org/doc/html/v5.7/process/deprecated.html?highlight=fallthrough#implicit-switch-case-fall-through

Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>

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mlxsw: core: Add validation of hardware device types for MGPIR register

When reading the number of gearboxes from the hardware, the driver does
not validate the returned 'device type' field. The dri

mlxsw: core: Add validation of hardware device types for MGPIR register

When reading the number of gearboxes from the hardware, the driver does
not validate the returned 'device type' field. The driver can therefore
wrongly assume that the queried devices are gearboxes.

On Spectrum-3 systems that support different types of devices, this can
prevent the driver from loading, as it will try to query the
temperature sensors from devices which it assumes are gearboxes and in
fact are not.

For example:
[ 218.129230] mlxsw_minimal 2-0048: Reg cmd access status failed (status=7(bad parameter))
[ 218.138282] mlxsw_minimal 2-0048: Reg cmd access failed (reg_id=900a(mtmp),type=write)
[ 218.147131] mlxsw_minimal 2-0048: Failed to setup temp sensor number 256
[ 218.534480] mlxsw_minimal 2-0048: Fail to register core bus
[ 218.540714] mlxsw_minimal: probe of 2-0048 failed with error -5

Fix this by validating the 'device type' field.

Fixes: 2e265a8b6c094 ("mlxsw: core: Extend hwmon interface with inter-connect temperature attributes")
Fixes: f14f4e621b1b4 ("mlxsw: core: Extend thermal core with per inter-connect device thermal zones")
Signed-off-by: Vadim Pasternak <vadimp@mellanox.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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mlxsw: hwmon: Provide optimization for QSFP modules number detection

Use new field "num_of_modules" of MGPIR register for "hwmon" interface
in order to get the number of modules supported by system

mlxsw: hwmon: Provide optimization for QSFP modules number detection

Use new field "num_of_modules" of MGPIR register for "hwmon" interface
in order to get the number of modules supported by system directly from
the system configuration, instead of getting it from port to module
mapping info.

Reading this info through MGPIR register is faster and does not depend
on possible dynamic re-configuration of ports.
In case of port dynamic re-configuration some modules can logically
"disappear" as a result of port split and un-spilt operations, which
can cause missing of some modules, in case this info is taken from port
to module mapping info.

Signed-off-by: Vadim Pasternak <vadimp@mellanox.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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mlxsw: reg: Extend MGPIR register with new field exposing the number of QSFP modules

Extend MGPIR - Management General Peripheral Information Register
with new field "num_of_modules" exposing the nu

mlxsw: reg: Extend MGPIR register with new field exposing the number of QSFP modules

Extend MGPIR - Management General Peripheral Information Register
with new field "num_of_modules" exposing the number of modules
supported by specific system.

Signed-off-by: Vadim Pasternak <vadimp@mellanox.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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mlxsw: core: Add support for negative temperature readout

Extend macros MLXSW_REG_MTMP_TEMP_TO_MC() to allow support of negative
temperature readout, since chip and others thermal components are
cap

mlxsw: core: Add support for negative temperature readout

Extend macros MLXSW_REG_MTMP_TEMP_TO_MC() to allow support of negative
temperature readout, since chip and others thermal components are
capable of operating within the negative temperature.
With no such support negative temperature will be consider as very high
temperature and it will cause wrong readout and thermal shutdown.
For negative values 2`s complement is used.
Tested in chamber.
Example of chip ambient temperature readout with chamber temperature:
-10 Celsius:
temp1: -6.0C (highest = -5.0C)
-5 Celsius:
temp1: -1.0C (highest = -1.0C)

v2 (Andrew Lunn):
* Replace '%u' with '%d' in mlxsw_hwmon_module_temp_show()

Signed-off-by: Vadim Pasternak <vadimp@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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mlxsw: core: Reduce buffer size in transactions for SFP modules temperature readout

Obtain SFP modules temperatures through MTMP register instead of MTBR
register, because the first one utilizes sho

mlxsw: core: Reduce buffer size in transactions for SFP modules temperature readout

Obtain SFP modules temperatures through MTMP register instead of MTBR
register, because the first one utilizes shorter transaction buffer size
for request. It improves performance in case low frequency interface
(I2C) is used for communication with a chip.

Signed-off-by: Vadim Pasternak <vadimp@mellanox.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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mlxsw: core: Extend hwmon interface with inter-connect temperature attributes

Add new attributes to hwmon object for exposing inter-connects temperature
input, highest, reset_history temperatures an

mlxsw: core: Extend hwmon interface with inter-connect temperature attributes

Add new attributes to hwmon object for exposing inter-connects temperature
input, highest, reset_history temperatures and label. Temperatures are read
from Management Temperature Register.
The number of inter-connect devices is read from Management General
Peripheral Information Register.

Signed-off-by: Vadim Pasternak <vadimp@mellanox.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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mlxsw: core: Prevent QSFP module initialization for old hardware

Old Mellanox silicons, like switchx-2, switch-ib do not support reading
QSFP modules temperature through MTMP register. Attempt to ac

mlxsw: core: Prevent QSFP module initialization for old hardware

Old Mellanox silicons, like switchx-2, switch-ib do not support reading
QSFP modules temperature through MTMP register. Attempt to access this
register on systems equipped with the this kind of silicon will cause
initialization flow failure.
Test for hardware resource capability is added in order to distinct
between old and new silicon - old silicons do not have such capability.

Fixes: 6a79507cfe94 ("mlxsw: core: Extend thermal module with per QSFP module thermal zones")
Fixes: 5c42eaa07bd0 ("mlxsw: core: Extend hwmon interface with QSFP module temperature attributes")
Reported-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Vadim Pasternak <vadimp@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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mlxsw: core: fix spelling mistake "temprature" -> "temperature"

There is a spelling mistake in several dev_err messages, fix these.

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Reviewed

mlxsw: core: fix spelling mistake "temprature" -> "temperature"

There is a spelling mistake in several dev_err messages, fix these.

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Reviewed-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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mlxsw: core: Add QSFP module temperature label attribute to hwmon

Add label attribute to hwmon object for exposing QSFP module's
temperature sensor name. Modules are labeled as "front panel xxx". Th

mlxsw: core: Add QSFP module temperature label attribute to hwmon

Add label attribute to hwmon object for exposing QSFP module's
temperature sensor name. Modules are labeled as "front panel xxx". The
label is used by utilities such as "sensors":

front panel 001: +0.0C (crit = +0.0C, emerg = +0.0C)
..
front panel 020: +31.0C (crit = +70.0C, emerg = +80.0C)
..
front panel 056: +41.0C (crit = +70.0C, emerg = +80.0C)

Signed-off-by: Vadim Pasternak <vadimp@mellanox.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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