Fix the possible frequency truncation for all values equal to or greater
4GHz on 64bit machines by updating the multiplier 'mult_factor' to
'unsigned long' type. It is also possible that the multiplier itself can
be greater than or equal to 2^32. So we need to also fix the equation
computing the value of the multiplier.
Fixes: a9e3fbfaa0 ("firmware: arm_scmi: add initial support for performance protocol")
Reported-by: Sibi Sankar <quic_sibis@quicinc.com>
Closes: https://lore.kernel.org/all/20231129065748.19871-3-quic_sibis@quicinc.com/
Cc: Cristian Marussi <cristian.marussi@arm.com>
Link: https://lore.kernel.org/r/20231130204343.503076-1-sudeep.holla@arm.com
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Platform and agent supported protocols versions do not necessarily match.
When talking to an older SCMI platform, supporting only older protocol
versions, the kernel SCMI agent will downgrade the version of the used
protocol to match the platform and avoid compatibility issues.
In the case where the kernel/OSPM agent happens to communicate with a
newer platform which can support newer protocol versions unknown to
the agent, and potentially backward incompatible, the agent currently
carries on, silently, in a best-effort approach.
Note that the SCMI specification doesn't provide means to explicitly
detect the protocol versions used by the agents, neither it is required
to support multiple, older, protocol versions.
Add an explicit protocol version check to let the agent detect when this
version mismatch happens and warn the user about this condition.
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Link: https://lore.kernel.org/r/20231201135858.2367651-1-cristian.marussi@arm.com
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
The number of opps on certain variants of the X1E80100 SoC are greater
than current maximum of 16, so increase the MAX_OPP count to 32 (next
power of 2) to accommodate that.
Signed-off-by: Sibi Sankar <quic_sibis@quicinc.com>
Link: https://lore.kernel.org/r/20231129065748.19871-4-quic_sibis@quicinc.com
Reviewed-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
The scmi_perf_domain_lookup requires the protocol handle to have the
private data set, which is yet to happen during the fastchannel init
scenario. This results in a NULL pointer dereference. Fix this by using
the pre-populated perf_dom_info to pass on the required information
instead.
| scmi_perf_protocol_init+0x434/0x678
| scmi_get_protocol_instance+0x168/0x29c
| scmi_devres_protocol_instance_get+0x50/0xa0
| scmi_devm_protocol_get+0x20/0x50
| scmi_cpufreq_probe+0x34/0xd4
| scmi_dev_probe+0x28/0x3c
| really_probe+0x148/0x2ac
| __driver_probe_device+0x78/0x12c
| driver_probe_device+0x40/0x160
| __device_attach_driver+0xb8/0x134
| bus_for_each_drv+0x80/0xdc
| __device_attach+0xa8/0x1b0
| device_initial_probe+0x14/0x20
| bus_probe_device+0xa8/0xac
| device_add+0x5cc/0x778
| device_register+0x20/0x30
| __scmi_device_create.part.0+0xec/0x1cc
| scmi_device_create+0x180/0x1c4
| scmi_create_protocol_devices+0x4c/0xb0
| scmi_probe+0x660/0x738
| platform_probe+0x68/0xdc
| really_probe+0x148/0x2ac
| __driver_probe_device+0x78/0x12c
| driver_probe_device+0x40/0x160
| __device_attach_driver+0xb8/0x134
| bus_for_each_drv+0x80/0xdc
| __device_attach+0xa8/0x1b0
| device_initial_probe+0x14/0x20
| bus_probe_device+0xa8/0xac
| deferred_probe_work_func+0x88/0xc0
| process_one_work+0x13c/0x264
| worker_thread+0x32c/0x438
| kthread+0x118/0x11c
| ret_from_fork+0x10/0x20
Fixes: 619bc6e034 ("firmware: arm_scmi: Populate fastchannel info only if set operations are allowed")
Signed-off-by: Sibi Sankar <quic_sibis@quicinc.com>
Link: https://lore.kernel.org/r/20231129065748.19871-2-quic_sibis@quicinc.com
Reviewed-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
The Kconfig options belongs closer to the corresponding implementations,
hence let's move them from the firmware to the pmdomain subsystem.
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Link: https://lore.kernel.org/r/20231123120847.2825444-1-sudeep.holla@arm.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Changes SCMI optee transport to call tee_client_system_session()
to request optee driver to provision an entry context in OP-TEE
for processing OP-TEE messages. This prevents possible deadlock
in case OP-TEE threads are all consumed while these may be waiting
for a clock or regulator to be enable which SCMI OP-TEE service which
requires a free thread context to execute.
Cc: Sudeep Holla <sudeep.holla@arm.com>
Cc: Cristian Marussi <cristian.marussi@arm.com>
Acked-by: Sudeep Holla <sudeep.holla@arm.com>
Reviewed-by: Sumit Garg <sumit.garg@linaro.org>
Signed-off-by: Etienne Carriere <etienne.carriere@foss.st.com>
Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
Some recently added SCMI protocols needs an additional flags parameter to
be able to properly configure the command used to query the extended name
of a resource.
Modify extended_name_get helper accordingly.
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Link: https://lore.kernel.org/r/20231114145449.3136412-1-cristian.marussi@arm.com
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Certain SCMI performance domains may have restrictions on the set level
and/or limits operation. If the SCMI domain supports fastchannel and the
set operations are not allowed, then any attempts to fetch the fastchannel
information for set level and/or limits operation will result in the
SCMI platform returning SCMI_ERR_SUPPORT. However, since this information
about the domain is already known to the agent(OSPM here) obtained via
PERF_DOMAIN_ATTRIBUTES, the agent(OSPM) can avoid calls to the firmware
trying to fetch the fastchannel information for the same.
Add those checks and skip querying the fastchannel information from the
firmware based on the information collected during the domain enumeration
stage.
Link: https://lore.kernel.org/r/20231113143252.37160-1-sudeep.holla@arm.com
Reviewed-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Certain SCMI performance domains may have restrictions on the set level
and/or limits operation. If the set level/limits are performed by an
agent who is not allowed to do so may get SCMI_ERR_SUPPORT. However,
since this information about the domain is already known to the
agent(OSPM here) obtained via PERF_DOMAIN_ATTRIBUTES, the agent(OSPM)
can avoid making PERF_LEVEL_SET and PERF_LIMITS_SET calls to the firmware.
Add those checks and return -ENOTSUPP to the caller without interacting
with the firmware based on the information collected during the domain
enumeration stage.
Signed-off-by: xinglong.yang <xinglong.yang@cixtech.com>
Link: https://lore.kernel.org/r/20231109082855.472681-1-xinglong.yang@cixtech.com
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Main additions this time include:
1. SCMI v3.2 clock configuration support:
This helps to retrieve the enabled state of a clock as well as allow
to set OEM specific clock configurations.
2. Support for generic performance scaling(DVFS):
The current SCMI DVFS support is limited to the CPUs in the kernel.
This extension enables it to used for all kind of devices and not
only for the CPUs. It updates the SCMI cpufreq to utilize the power
domain bindings. It also adds a more generic SCMI performance domain
based on the genpd framework that as be used for all the non-CPU
devices.
3. Extend the generic performance scaling(DVFS) support for firmware
driver OPPs:
Consumer drivers for devices that are attached to the SCMI performance
domain can't make use of the current OPP library to scale performance
as the OPPs are firmware driven and often obtained from the firmware
rather than the device tree. These changes extend the generic OPP
and genpd PM domain frameworks to identify and utilise these firmware
driven OPPs.
4. SCMI v3.2 clock parent support:
This enables the support for discovering and changing parent clocks
and extending the SCMI clk driver to use the same.
5. Qualcom SMC/HVC transport support:
The Qualcomm virtual platforms require capability id in the hypervisor
call to identify which doorbell to assert when supporting multiple
SMC/HVC based SCMI transport channels. Extra parameter is added to
support the same and the same is obtained at the fixed address in the
shared memory which is initialised by the firmware.
6. Move the existing SCMI power domain driver under drivers/pmdomain
Apart from the above main changes, it also include couple of minor fixes
and cosmetic reworks.
-----BEGIN PGP SIGNATURE-----
iQIzBAABCAAdFiEEunHlEgbzHrJD3ZPhAEG6vDF+4pgFAmUlJnAACgkQAEG6vDF+
4phxrw/+KLuLGg0QXTps4trI1E9cTAivpnEe6sWM27TZ792k6TecqWbRSJyvkrtg
MB9R9bIQobgGrQ2iFH+DQ+MOxjHI5qraoPV7rxcN+TzDlRsRJ6U51buFXyZpLvrp
BtcHgKVZ+Xhi9jCxykMJ18XfJv6Fm6D7/B0PCsBC0nOC2BQdq0mxZamEiiBKFiSK
6jtPXVBPracguush3rYVVio70O0ReIxMacIUAy3Oi5bH01DOx9lg2781KBBtrWKg
4RdnQS3uwUIpGn7cBn+Mmj/kh2QzKguRkdhuaFImgBI49+DVWsgQ05IstF1TA1SG
BlUWZOBr/CvcDH7xAc5FVJaIqbNvKQq4dss91AiXqmz2dzOCwJ+F1JafwUY9jLmI
fS6SfyDaSLMpx8SPDGVWippgpHWY/3dqtBxoqOvILTiYDz7ZXPWUeavn6dtr9gTU
nDWZNN6bj9EpTzVjSzMeCIiAjyjd2SGDyL9iuhUqA8pw4fidTJvbSpcAUOdkN7F5
coNZUlzv8pYB8mlBmCO4kETlTesQdt5ZjdTzCE529BuErGAwBqq/XZ/x9mhXfzwS
ojBwbgcejjnSFRC5XoW+LnZpruL5m1e+fe7aUfAcCSM/MqYOLQgKryT8mJOJnV0/
5H/WwBYeX+OxlLa0+znGzPChk4OgukARAA+oJ401e7gNHZg7DVw=
=IbXh
-----END PGP SIGNATURE-----
gpgsig -----BEGIN PGP SIGNATURE-----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=u9+1
-----END PGP SIGNATURE-----
Merge tag 'scmi-updates-6.7' of git://git.kernel.org/pub/scm/linux/kernel/git/sudeep.holla/linux into soc/drivers
Arm SCMI updates for v6.7
Main additions this time include:
1. SCMI v3.2 clock configuration support:
This helps to retrieve the enabled state of a clock as well as allow
to set OEM specific clock configurations.
2. Support for generic performance scaling(DVFS):
The current SCMI DVFS support is limited to the CPUs in the kernel.
This extension enables it to used for all kind of devices and not
only for the CPUs. It updates the SCMI cpufreq to utilize the power
domain bindings. It also adds a more generic SCMI performance domain
based on the genpd framework that as be used for all the non-CPU
devices.
3. Extend the generic performance scaling(DVFS) support for firmware
driver OPPs:
Consumer drivers for devices that are attached to the SCMI performance
domain can't make use of the current OPP library to scale performance
as the OPPs are firmware driven and often obtained from the firmware
rather than the device tree. These changes extend the generic OPP
and genpd PM domain frameworks to identify and utilise these firmware
driven OPPs.
4. SCMI v3.2 clock parent support:
This enables the support for discovering and changing parent clocks
and extending the SCMI clk driver to use the same.
5. Qualcom SMC/HVC transport support:
The Qualcomm virtual platforms require capability id in the hypervisor
call to identify which doorbell to assert when supporting multiple
SMC/HVC based SCMI transport channels. Extra parameter is added to
support the same and the same is obtained at the fixed address in the
shared memory which is initialised by the firmware.
6. Move the existing SCMI power domain driver under drivers/pmdomain
Apart from the above main changes, it also include couple of minor fixes
and cosmetic reworks.
* tag 'scmi-updates-6.7' of git://git.kernel.org/pub/scm/linux/kernel/git/sudeep.holla/linux: (37 commits)
firmware: arm_scmi: Add qcom smc/hvc transport support
dt-bindings: arm: Add new compatible for smc/hvc transport for SCMI
firmware: arm_scmi: Convert u32 to unsigned long to align with arm_smccc_1_1_invoke()
clk: scmi: Add support for clock {set,get}_parent
firmware: arm_scmi: Add support for clock parents
clk: scmi: Free scmi_clk allocated when the clocks with invalid info are skipped
firmware: arm_scpi: Use device_get_match_data()
firmware: arm_scmi: Add generic OPP support to the SCMI performance domain
firmware: arm_scmi: Specify the performance level when adding an OPP
firmware: arm_scmi: Simplify error path in scmi_dvfs_device_opps_add()
OPP: Extend support for the opp-level beyond required-opps
OPP: Switch to use dev_pm_domain_set_performance_state()
OPP: Extend dev_pm_opp_data with a level
OPP: Add dev_pm_opp_add_dynamic() to allow more flexibility
PM: domains: Implement the ->set_performance_state() callback for genpd
PM: domains: Introduce dev_pm_domain_set_performance_state()
firmware: arm_scmi: Rename scmi_{msg_,}clock_config_{get,set}_{2,21}
firmware: arm_scmi: Do not use !! on boolean when setting msg->flags
firmware: arm_scmi: Move power-domain driver to the pmdomain dir
pmdomain: arm: Add the SCMI performance domain
...
Link: https://lore.kernel.org/r/20231010124347.1620040-1-sudeep.holla@arm.com
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
This change adds the support for SCMI message exchange on Qualcomm
virtual platforms.
The hypervisor associates an object-id also known as capability-id
with each smc/hvc doorbell object. The capability-id is used to
identify the doorbell from the VM's capability namespace, similar
to a file-descriptor.
The hypervisor, in addition to the function-id, expects the capability-id
to be passed in x1 register when SMC/HVC call is invoked.
The capability-id is allocated by the hypervisor on bootup and is stored in
the shmem region by the firmware before starting Linux.
Signed-off-by: Nikunj Kela <quic_nkela@quicinc.com>
Reviewed-by: Brian Masney <bmasney@redhat.com>
Link: https://lore.kernel.org/r/20231009191437.27926-3-quic_nkela@quicinc.com
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
All the parameters to arm_smccc_1_1_invoke() are unsigned long which
aligns well on both 32-bit and 64-bit Arm based platforms. Let us store
all the members in the structure scmi_smc used as the parameters to the
arm_smccc_1_1_invoke() call as unsigned long.
Cc: Cristian Marussi <cristian.marussi@arm.com>
Reviewed-by: Cristian Marussi <cristian.marussi@arm.com>
Link: https://lore.kernel.org/r/20231009152049.1428872-1-sudeep.holla@arm.com
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
SCMI v3.2 spec introduces CLOCK_POSSIBLE_PARENTS_GET, CLOCK_PARENT_SET
and CLOCK_PARENT_GET. Add support for these to enable clock parents
and use them in the clock driver.
Reviewed-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
Link: https://lore.kernel.org/r/20231004-scmi-clock-v3-v5-1-1b8a1435673e@nxp.com
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
To enable the performance level to be used for OPPs, let's convert into
using the dev_pm_opp_add_dynamic() API when creating them. This will be
particularly useful for the SCMI performance domain, as shown through
subsequent changes.
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Link: https://lore.kernel.org/r/20230925131715.138411-9-ulf.hansson@linaro.org
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Let's simplify the code in scmi_dvfs_device_opps_add() by using
dev_pm_opp_remove_all_dynamic() in the error path.
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Link: https://lore.kernel.org/r/20230925131715.138411-8-ulf.hansson@linaro.org
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
It is very confusing to use *_v2 for everything applicable until SCMI
clock protocol version v2.0 including v1.0 for example. So let us rename
such that *_v2 is used only for SCMI clock protocol v2.1 onwards. Also
add comment to indicate the same explicitly.
Reviewed-by: Cristian Marussi <cristian.marussi@arm.com>
Link: https://lore.kernel.org/r/20230925101557.3839860-1-sudeep.holla@arm.com
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Both pc->async_powercap_cap_set and ignore_dresp are already boolean.
Use of !! on them is obviously dubious.
Sparse reports:
drivers/firmware/arm_scmi/powercap.c:363:17: warning: dubious: x & !y
drivers/firmware/arm_scmi/powercap.c:363:17: warning: dubious: x & !y
Remove the unnecessary !! and get rid of the warning.
Reviewed-by: Cristian Marussi <cristian.marussi@arm.com>
Link: https://lore.kernel.org/r/20230921085257.3125744-1-sudeep.holla@arm.com
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
To simplify with maintenance let's move the Arm SCMI power-domain driver
to the new pmdomain directory.
Link: https://lore.kernel.org/all/20230921113328.3208651-1-sudeep.holla@arm.com
Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
Cc: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
To enable support for performance scaling (DVFS) for generic devices with
the SCMI performance protocol, let's add an SCMI performance domain. This
is being modelled as a genpd provider, with support for performance scaling
through genpd's ->set_performance_state() callback.
Note that, this adds the initial support that allows consumer drivers for
attached devices, to vote for a new performance state via calling the
dev_pm_genpd_set_performance_state(). However, this should be avoided as
it's in most cases preferred to use the OPP library to vote for a new OPP
instead. The support using the OPP library isn't part of this change, but
needs to be implemented from subsequent changes.
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Link: https://lore.kernel.org/r/20230919121605.7304-1-ulf.hansson@linaro.org
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
There are no longer any users of the ->device_domain_id() ops in the
scmi_perf_proto_ops, therefore let's remove it.
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Link: https://lore.kernel.org/r/20230825112633.236607-6-ulf.hansson@linaro.org
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Most scmi_perf_proto_ops are already using an "u32 domain" as an
in-parameter to indicate what performance domain we shall operate upon.
However, some of the ops are using a "struct device *dev", which means that
an additional OF parsing is needed each time the perf ops gets called, to
find the corresponding domain-id.
To avoid the above, but also to make the code more consistent, let's
replace the in-parameter "struct device *dev" with an "u32 domain". Note
that, this requires us to make some corresponding changes to the scmi
cpufreq driver, so let's do that too.
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Link: https://lore.kernel.org/r/20230825112633.236607-5-ulf.hansson@linaro.org
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Similar to other protocol ops, it's useful for an scmi module driver to get
some generic information of a performance domain. Therefore, let's add a
new callback to provide this information. The information is currently
limited to the name of the performance domain and whether the set-level
operation is supported, although this can easily be extended if we find the
need for it.
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Link: https://lore.kernel.org/r/20230825112633.236607-3-ulf.hansson@linaro.org
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Similar to other protocol ops, it's useful for an scmi module driver to get
the number of supported performance domains, hence let's make this
available by adding a new perf protocol callback. Note that, a user is
being added from subsequent changes.
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Link: https://lore.kernel.org/r/20230825112633.236607-2-ulf.hansson@linaro.org
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Expose a couple of new SCMI clock operations to get and set OEM specific
clock configurations when talking to an SCMI v3.2 compliant.
Issuing such requests against an SCMI platform server not supporting v3.2
extension for OEM specific clock configurations will fail.
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Link: https://lore.kernel.org/r/20230826125308.462328-7-cristian.marussi@arm.com
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Support clock .state_get operation against SCMI platform servers that do
not support v3.2 CONFIG_GET dedicated command: while talking with these
platforms the command CLOCK_ATTRIBUTES can be used to gather the current
clock states.
Note that, in case of shared resources, the retrieved clock state 'flavour'
(virtual vs physical) depends on the backend SCMI platform server specific
kind of implementation.
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Link: https://lore.kernel.org/r/20230826125308.462328-5-cristian.marussi@arm.com
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Add support for v3.2 clock CONFIG_GET command and related new clock
protocol operation state_get() to retrieve the status of a clock.
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Link: https://lore.kernel.org/r/20230826125308.462328-4-cristian.marussi@arm.com
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
SCMI v3.2 introduces a new clock CONFIG_SET message format that can
optionally carry also OEM specific configuration values beside the usual
clock enable/disable requests.
Refactor internal helpers and add support to use such new format when
talking to a v3.2 compliant SCMI platform.
Support existing enable/disable operations across different clock protocol
versions: this patch still does not add protocol operations to support the
new OEM specific optional configuration capabilities.
No functional change for the SCMI drivers users of the related enable and
disable clock operations.
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Link: https://lore.kernel.org/r/20230826125308.462328-3-cristian.marussi@arm.com
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
SCMI clock enable/disable operations come in 2 different flavours which
simply just differ in how the underlying SCMI transactions is carried on:
atomic or not.
Currently we expose such SCMI operations through 2 distinctly named
wrappers, that, in turn, are wrapped into another couple of similarly and
distinctly named callbacks inside SCMI clock driver user.
Reduce the churn of duplicated wrappers by adding a param to SCMI clock
enable/disable operations to ask for atomic operation while removing the
_atomic version of such operations.
No functional change.
CC: Michael Turquette <mturquette@baylibre.com>
CC: Stephen Boyd <sboyd@kernel.org>
CC: linux-clk@vger.kernel.org
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Acked-by: Stephen Boyd <sboyd@kernel.org>
Link: https://lore.kernel.org/r/20230826125308.462328-2-cristian.marussi@arm.com
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
The perf power scale value would currently be reported as bogowatts if the
platform firmware supports microwatt power scale and meets the perf major
version requirements. Fix this by populating version information in the
driver private data before the call to protocol attributes is made.
CC: Chandra Sekhar Lingutla <quic_lingutla@quicinc.com>
Fixes: 3630cd8130 ("firmware: arm_scmi: Add SCMI v3.1 perf power-cost in microwatts")
Signed-off-by: Sibi Sankar <quic_sibis@quicinc.com>
Reviewed-by: Cristian Marussi <cristian.marussi@arm.com>
Link: https://lore.kernel.org/r/20230811204818.30928-1-quic_sibis@quicinc.com
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
These are all minor cleanups for platform specific code in arch/arm/
and some of the associated drivers. The majority of these are work
done by Rob Herring to improve the way devicetreee header files
are handled.
-----BEGIN PGP SIGNATURE-----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=c9NM
-----END PGP SIGNATURE-----
Merge tag 'soc-arm-6.6' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc
Pull ARM SoC cleanups from Arnd Bergmann:
"These are all minor cleanups for platform specific code in arch/arm/
and some of the associated drivers. The majority of these are work
done by Rob Herring to improve the way devicetreee header files are
handled"
* tag 'soc-arm-6.6' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (49 commits)
ARM: davinci: Drop unused includes
ARM: s5pv210: Explicitly include correct DT includes
ARM: dove: Drop unused includes
ARM: mvebu: Explicitly include correct DT includes
Documentation/process: maintainer-soc: document dtbs_check requirement for Samsung
MAINTAINER: samsung: document dtbs_check requirement for Samsung
Documentation/process: maintainer-soc: add clean platforms profile
MAINTAINERS: soc: reference maintainer profile
ARM: nspire: Remove unused header file mmio.h
ARM: nspire: Use syscon-reboot to handle restart
soc: fsl: Explicitly include correct DT includes
soc: xilinx: Explicitly include correct DT includes
soc: sunxi: Explicitly include correct DT includes
soc: rockchip: Explicitly include correct DT includes
soc: mediatek: Explicitly include correct DT includes
soc: aspeed: Explicitly include correct DT includes
firmware: Explicitly include correct DT includes
bus: Explicitly include correct DT includes
ARM: spear: Explicitly include correct DT includes
ARM: mvebu: Explicitly include correct DT includes
...
The main change this time is the introduction of the drivers/genpd
subsystem that gets split out from drivers/soc to keep common
functionality together. Ulf Hansson is taking over maintainership for
these and is sending a separate pull request with the same commits,
but they are in the soc drivers tree to avoid conflicts against other
soc driver patches.
The SCMI driver subsystem gets an update to version 3.2 of the
specification. There are also updates to memory, reset and other firmware
drivers.
On the soc driver side, the updates are mostly cleanups across a number
of Arm platforms. On driver for loongarch adds power management for DT
based systems, another driver is for HiSilicon's Arm server chips with
their HCCS system health interface.
The remaining updates for the most part add support for additional
hardware in existing drivers or contain minor cleanups. Most of these
are for the Qualcomm Snapdragon platform.
-----BEGIN PGP SIGNATURE-----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=xmHW
-----END PGP SIGNATURE-----
Merge tag 'soc-drivers-6.6' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc
Pull ARM SoC driver updates from Arnd Bergmann:
"The main change this time was the introduction of the drivers/genpd
subsystem that gets split out from drivers/soc to keep common
functionality together.
The SCMI driver subsystem gets an update to version 3.2 of the
specification. There are also updates to memory, reset and other
firmware drivers.
On the soc driver side, the updates are mostly cleanups across a
number of Arm platforms. On driver for loongarch adds power management
for DT based systems, another driver is for HiSilicon's Arm server
chips with their HCCS system health interface.
The remaining updates for the most part add support for additional
hardware in existing drivers or contain minor cleanups. Most of these
are for the Qualcomm Snapdragon platform"
* tag 'soc-drivers-6.6' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (136 commits)
bus: fsl-mc: Use common ranges functions
soc: kunpeng_hccs: fix some sparse warnings about incorrect type
soc: loongson2_pm: add power management support
soc: dt-bindings: add loongson-2 pm
soc: rockchip: grf: Fix SDMMC not working on RK3588 with bus-width > 1
genpd: rockchip: Add PD_VO entry for rv1126
bus: ti-sysc: Fix cast to enum warning
soc: kunpeng_hccs: add MAILBOX dependency
MAINTAINERS: remove OXNAS entry
dt-bindings: interrupt-controller: arm,versatile-fpga-irq: mark oxnas compatible as deprecated
irqchip: irq-versatile-fpga: remove obsolete oxnas compatible
soc: qcom: aoss: Tidy up qmp_send() callers
soc: qcom: aoss: Format string in qmp_send()
soc: qcom: aoss: Move length requirements from caller
soc: kunpeng_hccs: fix size_t format string
soc: ti: k3-socinfo.c: Add JTAG ID for AM62PX
dt-bindings: firmware: qcom: scm: Updating VMID list
firmware: imx: scu-irq: support identifying SCU wakeup source from sysfs
firmware: imx: scu-irq: enlarge the IMX_SC_IRQ_NUM_GROUP
firmware: imx: scu-irq: add imx_scu_irq_get_status
...
The DT of_device.h and of_platform.h date back to the separate
of_platform_bus_type before it as merged into the regular platform bus.
As part of that merge prepping Arm DT support 13 years ago, they
"temporarily" include each other. They also include platform_device.h
and of.h. As a result, there's a pretty much random mix of those include
files used throughout the tree. In order to detangle these headers and
replace the implicit includes with struct declarations, users need to
explicitly include the correct includes.
Acked-by: Dinh Nguyen <dinguyen@kernel.org>
Acked-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Rob Herring <robh@kernel.org>
Acked-by: Sudeep Holla <sudeep.holla@arm.com>
Link: https://lore.kernel.org/r/20230803-dt-header-cleanups-for-soc-v2-17-d8de2cc88bff@kernel.org
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
SCMI v3.2 adds PERF protocol support to optionally define performance
domains that cannot be represented on a linear scale; the platform firmware
can declare the performance levels of a domain as being 'level indexed' and
provide an indicative frequency associated to each of those levels, with
such indexes not required anymore to be contiguous nor to satisfy any
linear-scaling constraint: when level-indexing is available for a domain,
the platform will expect to deal with SCMI requests using indexes instead
of performance levels for that domain.
Add level-indexing mode support to the PERF protocol implementation while
maintaining unchanged the protocol operations interface exposed by PERF;
all the required mapping from performamce levels/frequencies to the
corresponding level indexes is carried out transparently by the core PERF
protocol support: as a consequence no change is either required in any
SCMI driver using the PERF protocol, even when using level indexing.
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Link: https://lore.kernel.org/r/20230717161246.1761777-3-cristian.marussi@arm.com
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
SCMI transport based on SMC can optionally use an additional IRQ to
signal message completion. The associated interrupt handler is currently
allocated using devres but on shutdown the core SCMI stack will call
.chan_free() well before any managed cleanup is invoked by devres.
As a consequence, the arrival of a late reply to an in-flight pending
transaction could still trigger the interrupt handler well after the
SCMI core has cleaned up the channels, with unpleasant results.
Inhibit further message processing on the IRQ path by explicitly freeing
the IRQ inside .chan_free() callback itself.
Fixes: dd820ee21d ("firmware: arm_scmi: Augment SMC/HVC to allow optional interrupt")
Reported-by: Bjorn Andersson <andersson@kernel.org>
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Link: https://lore.kernel.org/r/20230719173533.2739319-1-cristian.marussi@arm.com
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
The OF node reference obtained from of_parse_phandle() should be dropped
if node is not compatible with arm,scmi-shmem.
Fixes: 507cd4d2c5 ("firmware: arm_scmi: Add compatibility checks for shmem node")
Cc: <stable@vger.kernel.org>
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Cristian Marussi <cristian.marussi@arm.com>
Link: https://lore.kernel.org/r/20230719061652.8850-1-krzysztof.kozlowski@linaro.org
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Handle signed error return values returned by simple_write_to_buffer().
In case of an error, return the error code.
Fixes: 3c3d818a93 ("firmware: arm_scmi: Add core raw transmission support")
Reported-by: Dan Carpenter <dan.carpenter@linaro.org>
Signed-off-by: Sukrut Bellary <sukrut.bellary@linux.com>
Reviewed-by: Cristian Marussi <cristian.marussi@arm.com>
Tested-by: Cristian Marussi <cristian.marussi@arm.com>
Reviewed-by: Dan Carpenter <dan.carpenter@linaro.org>
Link: https://lore.kernel.org/r/20230718085529.258899-1-sukrut.bellary@linux.com
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Nothing surprising in the SoC specific drivers, with the usual updates:
* Added or improved SoC driver support for Tegra234, Exynos4121, RK3588,
as well as multiple Mediatek and Qualcomm chips
* SCMI firmware gains support for multiple SMC/HVC transport and version
3.2 of the protocol
* Cleanups amd minor changes for the reset controller, memory controller,
firmware and sram drivers
* Minor changes to amd/xilinx, samsung, tegra, nxp, ti, qualcomm,
amlogic and renesas SoC specific drivers
-----BEGIN PGP SIGNATURE-----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=zvLr
-----END PGP SIGNATURE-----
Merge tag 'soc-drivers-6.5' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc
Pull ARM SoC driver updates from Arnd Bergmann:
"Nothing surprising in the SoC specific drivers, with the usual
updates:
- Added or improved SoC driver support for Tegra234, Exynos4121,
RK3588, as well as multiple Mediatek and Qualcomm chips
- SCMI firmware gains support for multiple SMC/HVC transport and
version 3.2 of the protocol
- Cleanups amd minor changes for the reset controller, memory
controller, firmware and sram drivers
- Minor changes to amd/xilinx, samsung, tegra, nxp, ti, qualcomm,
amlogic and renesas SoC specific drivers"
* tag 'soc-drivers-6.5' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (118 commits)
dt-bindings: interrupt-controller: Convert Amlogic Meson GPIO interrupt controller binding
MAINTAINERS: add PHY-related files to Amlogic SoC file list
drivers: meson: secure-pwrc: always enable DMA domain
tee: optee: Use kmemdup() to replace kmalloc + memcpy
soc: qcom: geni-se: Do not bother about enable/disable of interrupts in secondary sequencer
dt-bindings: sram: qcom,imem: document qdu1000
soc: qcom: icc-bwmon: Fix MSM8998 count unit
dt-bindings: soc: qcom,rpmh-rsc: Require power-domains
soc: qcom: socinfo: Add Soc ID for IPQ5300
dt-bindings: arm: qcom,ids: add SoC ID for IPQ5300
soc: qcom: Fix a IS_ERR() vs NULL bug in probe
soc: qcom: socinfo: Add support for new fields in revision 19
soc: qcom: socinfo: Add support for new fields in revision 18
dt-bindings: firmware: scm: Add compatible for SDX75
soc: qcom: mdt_loader: Fix split image detection
dt-bindings: memory-controllers: drop unneeded quotes
soc: rockchip: dtpm: use C99 array init syntax
firmware: tegra: bpmp: Add support for DRAM MRQ GSCs
soc/tegra: pmc: Use devm_clk_notifier_register()
soc/tegra: pmc: Simplify debugfs initialization
...
SCMI powercap protocol v3.2 supports disabling the powercap on a zone
by zone basis by providing a zero valued powercap.
Expose new operations to enable/disable powercapping on a per-zone base.
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Link: https://lore.kernel.org/r/20230531152039.2363181-3-cristian.marussi@arm.com
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
This change adds support for passing shmem channel address as parameters
in smc/hvc call. The address is split into 4KB-page and offset.
This is useful when multiple scmi instances are using same smc-id
and firmware needs to distinguish among the instances.
Signed-off-by: Nikunj Kela <quic_nkela@quicinc.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Link: https://lore.kernel.org/r/20230506182428.25343-3-quic_nkela@quicinc.com
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
scmi_xfer_raw_worker_init() is specifying a flag, WQ_SYSFS, as @max_active.
Fix it by or'ing WQ_SYSFS into @flags so that it actually enables sysfs
interface and using 0 for @max_active for the default setting.
Signed-off-by: Tejun Heo <tj@kernel.org>
Fixes: 3c3d818a93 ("firmware: arm_scmi: Add core raw transmission support")
Link: https://lore.kernel.org/r/ZEGTnajiQm7mkkZS@slm.duckdns.org
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
The main and only new addition this time around is the support for
unidirectional mailbox channels. SCMI communicates between the agent
and the platform using one bidirectional 'a2p' channel used by the agent
to send SCMI commands and synchronously receive the related replies, and
an optional 'p2a' unidirectional channel used to asynchronously receive
delayed responses and notifications emitted from the platform.
In order to support platforms that support only unidirectional mailbox
hardware channels, the existing bindings are extended to support the
same. Both bidirectional and unidirectional channels support for the
SCMI mailbox can coexist. The correct and effective combination of
defined 'mboxes' and 'shmem' descriptors determines the type of the
mailbox channel.
This also contains a fix for the transfers allocation on Rx channel
especially when the base protocol doesn't use Rx channel while some
of the protocols can have dedicated Rx channels.
-----BEGIN PGP SIGNATURE-----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=8/Bb
-----END PGP SIGNATURE-----
gpgsig -----BEGIN PGP SIGNATURE-----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=maaU
-----END PGP SIGNATURE-----
Merge tag 'scmi-updates-6.4' of git://git.kernel.org/pub/scm/linux/kernel/git/sudeep.holla/linux into soc/drivers
Arm SCMI updates for v6.4
The main and only new addition this time around is the support for
unidirectional mailbox channels. SCMI communicates between the agent
and the platform using one bidirectional 'a2p' channel used by the agent
to send SCMI commands and synchronously receive the related replies, and
an optional 'p2a' unidirectional channel used to asynchronously receive
delayed responses and notifications emitted from the platform.
In order to support platforms that support only unidirectional mailbox
hardware channels, the existing bindings are extended to support the
same. Both bidirectional and unidirectional channels support for the
SCMI mailbox can coexist. The correct and effective combination of
defined 'mboxes' and 'shmem' descriptors determines the type of the
mailbox channel.
This also contains a fix for the transfers allocation on Rx channel
especially when the base protocol doesn't use Rx channel while some
of the protocols can have dedicated Rx channels.
* tag 'scmi-updates-6.4' of git://git.kernel.org/pub/scm/linux/kernel/git/sudeep.holla/linux:
firmware: arm_scmi: Add support for unidirectional mailbox channels
dt-bindings: firmware: arm,scmi: Support mailboxes unidirectional channels
firmware: arm_scmi: Fix xfers allocation on Rx channel
firmware: arm_scmi: Use the bitmap API to allocate bitmaps
firmware: arm_scmi: Fix device node validation for mailbox transport
firmware: arm_scmi: Fix raw coexistence mode behaviour on failure path
firmware: arm_scmi: Remove duplicate include header inclusion
firmware: arm_scmi: Return a literal instead of a variable
firmware: arm_scmi: Clean up a return statement in scmi_probe
Link: https://lore.kernel.org/r/20230417145743.1904318-1-sudeep.holla@arm.com
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Extend the SCMI transport layer to support mailbox controllers that expose
communication channels that are unidirectional by nature.
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Link: https://lore.kernel.org/r/20230404115026.2828149-3-cristian.marussi@arm.com
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
It is preferred to use typed property access functions (i.e.
of_property_read_<type> functions) rather than low-level
of_get_property/of_find_property functions for reading properties. As
part of this, convert of_get_property/of_find_property calls to the
recently added of_property_present() helper when we just want to test
for presence of a property and nothing more.
Signed-off-by: Rob Herring <robh@kernel.org>
Acked-by: Sudeep Holla <sudeep.holla@arm.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Two distinct pools of xfer descriptors are allocated at initialization
time: one (Tx) used to provide xfers to track commands and their replies
(or delayed replies) and another (Rx) to pick xfers from to be used for
processing notifications.
Such pools, though, are allocated globally to be used by the whole SCMI
instance, they are not allocated per-channel and as such the allocation of
notifications xfers cannot be simply skipped if no Rx channel was found for
the base protocol common channel, because there could be defined more
optional per-protocol dedicated channels that instead support Rx channels.
Change the conditional check to skip allocation for the notification pool
only if no Rx channel has been detected on any per-channel protocol at all.
Fixes: 4ebd8f6dea ("firmware: arm_scmi: Add receive buffer support for notifications")
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Link: https://lore.kernel.org/r/20230326203449.3492948-1-cristian.marussi@arm.com
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Use devm_bitmap_zalloc() instead of hand-writing them.
It is less verbose and it improves the semantic.
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Reviewed-by: Cristian Marussi <cristian.marussi@arm.com>
Tested-by: Cristian Marussi <cristian.marussi@arm.com>
Link: https://lore.kernel.org/r/c073b1607ada34d5bde6ce1009179cf15bbf0da3.1657308593.git.christophe.jaillet@wanadoo.fr
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
When mailboxes are used as a transport it is possible to setup the SCMI
transport layer, depending on the underlying channels configuration, to use
one or two mailboxes, associated, respectively, to one or two, distinct,
shared memory areas: any other combination should be treated as invalid.
Add more strict checking of SCMI mailbox transport device node descriptors.
Fixes: 5c8a47a5a9 ("firmware: arm_scmi: Make scmi core independent of the transport type")
Cc: <stable@vger.kernel.org> # 4.19
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Link: https://lore.kernel.org/r/20230307162324.891866-1-cristian.marussi@arm.com
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
When SCMI raw coexistence mode is enabled make the core stack probe
successfully even when the initial base protocol exchanges with the
platform/server failed.
This behaviour enables the system to boot with a broken regular SCMI
stack but with a fully functional and accessible SCMI raw debugfs
interface that can be used to further debug the issue.
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Link: https://lore.kernel.org/r/20230223152330.2707260-1-cristian.marussi@arm.com
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
linux/of.h is included more than once, just remove the duplicate include
header inclusion.
Signed-off-by: Ye Xingchen <ye.xingchen@zte.com.cn>
Link: https://lore.kernel.org/r/202302101520071730986@zte.com.cn
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
In this context "return scmi_dev;" and "return NULL;" are equivalent
but it is more readable to return a literal.
Signed-off-by: Dan Carpenter <error27@gmail.com>
Reviewed-by: Cristian Marussi <cristian.marussi@arm.com>
Link: https://lore.kernel.org/r/Y/Yx8pOdf8rNhPVe@kili
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
The comments say "enabled" where "disabled" is intended. Also it's
cleaner to return zero explicitly instead of ret.
Signed-off-by: Dan Carpenter <error27@gmail.com>
Link: https://lore.kernel.org/r/Y86im5M49p3ePGxj@kili
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
As usual, there are lots of minor driver changes across SoC platforms
from NXP, Amlogic, AMD Zynq, Mediatek, Qualcomm, Apple and Samsung.
These usually add support for additional chip variations in existing
drivers, but also add features or bugfixes.
The SCMI firmware subsystem gains a unified raw userspace interface
through debugfs, which can be used for validation purposes.
Newly added drivers include:
- New power management drivers for StarFive JH7110, Allwinner D1 and
Renesas RZ/V2M
- A driver for Qualcomm battery and power supply status
- A SoC device driver for identifying Nuvoton WPCM450 chips
- A regulator coupler driver for Mediatek MT81xxv
-----BEGIN PGP SIGNATURE-----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=p6Xp
-----END PGP SIGNATURE-----
Merge tag 'soc-drivers-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc
Pull ARM SoC driver updates from Arnd Bergmann:
"As usual, there are lots of minor driver changes across SoC platforms
from NXP, Amlogic, AMD Zynq, Mediatek, Qualcomm, Apple and Samsung.
These usually add support for additional chip variations in existing
drivers, but also add features or bugfixes.
The SCMI firmware subsystem gains a unified raw userspace interface
through debugfs, which can be used for validation purposes.
Newly added drivers include:
- New power management drivers for StarFive JH7110, Allwinner D1 and
Renesas RZ/V2M
- A driver for Qualcomm battery and power supply status
- A SoC device driver for identifying Nuvoton WPCM450 chips
- A regulator coupler driver for Mediatek MT81xxv"
* tag 'soc-drivers-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (165 commits)
power: supply: Introduce Qualcomm PMIC GLINK power supply
soc: apple: rtkit: Do not copy the reg state structure to the stack
soc: sunxi: SUN20I_PPU should depend on PM
memory: renesas-rpc-if: Remove redundant division of dummy
soc: qcom: socinfo: Add IDs for IPQ5332 and its variant
dt-bindings: arm: qcom,ids: Add IDs for IPQ5332 and its variant
dt-bindings: power: qcom,rpmpd: add RPMH_REGULATOR_LEVEL_LOW_SVS_L1
firmware: qcom_scm: Move qcom_scm.h to include/linux/firmware/qcom/
MAINTAINERS: Update qcom CPR maintainer entry
dt-bindings: firmware: document Qualcomm SM8550 SCM
dt-bindings: firmware: qcom,scm: add qcom,scm-sa8775p compatible
soc: qcom: socinfo: Add Soc IDs for IPQ8064 and variants
dt-bindings: arm: qcom,ids: Add Soc IDs for IPQ8064 and variants
soc: qcom: socinfo: Add support for new field in revision 17
soc: qcom: smd-rpm: Add IPQ9574 compatible
soc: qcom: pmic_glink: remove redundant calculation of svid
soc: qcom: stats: Populate all subsystem debugfs files
dt-bindings: soc: qcom,rpmh-rsc: Update to allow for generic nodes
soc: qcom: pmic_glink: add CONFIG_NET/CONFIG_OF dependencies
soc: qcom: pmic_glink: Introduce altmode support
...
On a system configured with multiple transport channels, expose a few
additional debugfs per-channel entries to allow a user to explicitly select
which transport channel to use for the SCMI message injection.
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Tested-by: Florian Fainelli <f.fainelli@gmail.com>
Tested-by: Vincent Guittot <vincent.guittot@linaro.org>
Link: https://lore.kernel.org/r/20230118121426.492864-18-cristian.marussi@arm.com
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
When the raw support is enabled and configured in co-existence mode the
normal SCMI drivers are allowed to register with the SCMI core and
operate as usual alongside the raw operations.
SCMI normal and raw messages will be kept segregated from each other,
but only at the transaction level. Any further possible interference at
the protocol layer will have instead to be handled by the user to attain
reliable results while using the raw transactions.
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Tested-by: Florian Fainelli <f.fainelli@gmail.com>
Tested-by: Vincent Guittot <vincent.guittot@linaro.org>
Link: https://lore.kernel.org/r/20230118121426.492864-17-cristian.marussi@arm.com
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Add a few call sites where, if SCMI raw mode access had been enabled in
Kconfig, the needed SCMI raw initialization and hooks are called.
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Tested-by: Florian Fainelli <f.fainelli@gmail.com>
Tested-by: Vincent Guittot <vincent.guittot@linaro.org>
Link: https://lore.kernel.org/r/20230118121426.492864-16-cristian.marussi@arm.com
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Reject SCMI driver registration when SCMI raw mode support is configured,
so as to avoid interferences between the SCMI raw mode transactions and the
normal SCMI stack operations.
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Tested-by: Florian Fainelli <f.fainelli@gmail.com>
Tested-by: Vincent Guittot <vincent.guittot@linaro.org>
Link: https://lore.kernel.org/r/20230118121426.492864-15-cristian.marussi@arm.com
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Add SCMI raw mode support which exposes a userspace interface to allow for
bare SCMI command injection and snooping from userspace.
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Tested-by: Florian Fainelli <f.fainelli@gmail.com>
Tested-by: Vincent Guittot <vincent.guittot@linaro.org>
Link: https://lore.kernel.org/r/20230118121426.492864-13-cristian.marussi@arm.com
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Create a common SCMI debugfs root directory and populate it with some
common SCMI data for each discovered SCMI platform instance if SCMI
debugfs is needed by any configured SCMI facility.
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Tested-by: Florian Fainelli <f.fainelli@gmail.com>
Tested-by: Vincent Guittot <vincent.guittot@linaro.org>
Link: https://lore.kernel.org/r/20230118121426.492864-11-cristian.marussi@arm.com
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Add the channel and platform instance indentifier to SCMI message dump
traces in order to easily associate message flows to specific transport
channels.
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Tested-by: Florian Fainelli <f.fainelli@gmail.com>
Tested-by: Vincent Guittot <vincent.guittot@linaro.org>
Link: https://lore.kernel.org/r/20230118121426.492864-9-cristian.marussi@arm.com
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Add a couple of unique identifiers to channel and platform instance
descriptors in order to emit more descriptive message dump traces.
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Tested-by: Florian Fainelli <f.fainelli@gmail.com>
Tested-by: Vincent Guittot <vincent.guittot@linaro.org>
Link: https://lore.kernel.org/r/20230118121426.492864-8-cristian.marussi@arm.com
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Move SCMI error codes definitions and helper to the common.h header
together with the delayed response timeout define.
No functional change.
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Tested-by: Florian Fainelli <f.fainelli@gmail.com>
Tested-by: Vincent Guittot <vincent.guittot@linaro.org>
Link: https://lore.kernel.org/r/20230118121426.492864-7-cristian.marussi@arm.com
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Add a 'flags' field to xfer and define a flagbit and related macro to easily
identify xfers originated from the raw transmissions.
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Tested-by: Florian Fainelli <f.fainelli@gmail.com>
Tested-by: Vincent Guittot <vincent.guittot@linaro.org>
Link: https://lore.kernel.org/r/20230118121426.492864-5-cristian.marussi@arm.com
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Refactor scmi_wait_for_message_response() to use a internal helper to
carry out its main duties; while doing that make it accept directly an
scmi_desc parameter to interact with the configured transport.
No functional change.
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Tested-by: Florian Fainelli <f.fainelli@gmail.com>
Tested-by: Vincent Guittot <vincent.guittot@linaro.org>
Link: https://lore.kernel.org/r/20230118121426.492864-4-cristian.marussi@arm.com
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Refactor polling helpers to receive scmi_desc directly as a parameter and
move all of them to common.h.
No functional change.
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Tested-by: Florian Fainelli <f.fainelli@gmail.com>
Tested-by: Vincent Guittot <vincent.guittot@linaro.org>
Link: https://lore.kernel.org/r/20230118121426.492864-3-cristian.marussi@arm.com
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Move the whole xfer in-flight registration process out of scmi_xfer_get
and while at that, split the sequence number selection steps from the
in-flight registration procedure itself.
No functional change.
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Tested-by: Florian Fainelli <f.fainelli@gmail.com>
Tested-by: Vincent Guittot <vincent.guittot@linaro.org>
Link: https://lore.kernel.org/r/20230118121426.492864-2-cristian.marussi@arm.com
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Make the SCMI bus on its own as a distinct module initialized at
subsys_initcall level when builtin.
Keep the SCMI driver core stack, together with any configured transport,
in a different module initialized as module_init level.
SCMI drivers initialization remain unchanged at module_init level.
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Link: https://lore.kernel.org/r/20221222185049.737625-10-cristian.marussi@arm.com
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Protocol devices are created or destroyed depending on the related device
request/unrequest events emitted on the scmi_requested_devices_nh
notification chain by the SCMI bus and served in the driver by the
scmi_device_request_notifier.
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Link: https://lore.kernel.org/r/20221222185049.737625-9-cristian.marussi@arm.com
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Refactor SCMI device create/destroy helpers: it is now possible to ask
for the creation of all the currently requested devices for a whole
protocol, not only for the creation of a single well-defined device.
While at that, re-instate uniqueness checks on the creation of SCMI
SystemPower devices.
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Link: https://lore.kernel.org/r/20221222185049.737625-8-cristian.marussi@arm.com
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Move protocol device request helpers from driver.c compilation unit to
bus.c, so reducing the cross interactions between driver.c and bus.c.
Get rid of old protocol device creation process as a whole from driver.c
and remove also stale SCMI system power unicity checks.
While at that make such helpers call into scmi_requested_devices_nh
notification chain.
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Link: https://lore.kernel.org/r/20221222185049.737625-6-cristian.marussi@arm.com
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Add a pair of notifier chains and generic empty notifier callbacks.
Currently they are still unused but they will be used to act properly
on device request and creation events.
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Link: https://lore.kernel.org/r/20221222185049.737625-5-cristian.marussi@arm.com
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Move protocol registration helpers and logic out of bus.c compilation
unit into driver.c.
No functional change.
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Link: https://lore.kernel.org/r/20221222185049.737625-4-cristian.marussi@arm.com
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Refactor channels initialization to use dedicated transport devices
instead of using devices borrowed from the SCMI drivers.
Initialize all channels, as described in the device tree, upfront during
SCMI core stack probe phase and free all of them, including the underlying
devices, when the SCMI core is removed.
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Link: https://lore.kernel.org/r/20221222185049.737625-3-cristian.marussi@arm.com
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
SCMI transport operation .chan_available determines in a transport
specific way if an SCMI channel is still available and to be configured.
Such information is derived by analyzing bits of device node in a
transport specific way, all it needs is a device node to operate up on,
not necessarily a full blown device.
Simplify the helper to receive in input a reference to a device_node
instead of a device carrying a pointer to such device_node.
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Link: https://lore.kernel.org/r/20221222185049.737625-2-cristian.marussi@arm.com
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
When unloading the SCMI core stack module, configured to use the virtio
SCMI transport, LOCKDEP reports the splat down below about unsafe locks
dependencies.
In order to avoid this possible unsafe locking scenario call upfront
virtio_break_device() before getting hold of vioch->lock.
=====================================================
WARNING: HARDIRQ-safe -> HARDIRQ-unsafe lock order detected
6.1.0-00067-g6b934395ba07-dirty #4 Not tainted
-----------------------------------------------------
rmmod/307 [HC0[0]:SC0[0]:HE0:SE1] is trying to acquire:
ffff000080c510e0 (&dev->vqs_list_lock){+.+.}-{3:3}, at: virtio_break_device+0x28/0x68
and this task is already holding:
ffff00008288ada0 (&channels[i].lock){-.-.}-{3:3}, at: virtio_chan_free+0x60/0x168 [scmi_module]
which would create a new lock dependency:
(&channels[i].lock){-.-.}-{3:3} -> (&dev->vqs_list_lock){+.+.}-{3:3}
but this new dependency connects a HARDIRQ-irq-safe lock:
(&channels[i].lock){-.-.}-{3:3}
... which became HARDIRQ-irq-safe at:
lock_acquire+0x128/0x398
_raw_spin_lock_irqsave+0x78/0x140
scmi_vio_complete_cb+0xb4/0x3b8 [scmi_module]
vring_interrupt+0x84/0x120
vm_interrupt+0x94/0xe8
__handle_irq_event_percpu+0xb4/0x3d8
handle_irq_event_percpu+0x20/0x68
handle_irq_event+0x50/0xb0
handle_fasteoi_irq+0xac/0x138
generic_handle_domain_irq+0x34/0x50
gic_handle_irq+0xa0/0xd8
call_on_irq_stack+0x2c/0x54
do_interrupt_handler+0x8c/0x90
el1_interrupt+0x40/0x78
el1h_64_irq_handler+0x18/0x28
el1h_64_irq+0x64/0x68
_raw_write_unlock_irq+0x48/0x80
ep_start_scan+0xf0/0x128
do_epoll_wait+0x390/0x858
do_compat_epoll_pwait.part.34+0x1c/0xb8
__arm64_sys_epoll_pwait+0x80/0xd0
invoke_syscall+0x4c/0x110
el0_svc_common.constprop.3+0x98/0x120
do_el0_svc+0x34/0xd0
el0_svc+0x40/0x98
el0t_64_sync_handler+0x98/0xc0
el0t_64_sync+0x170/0x174
to a HARDIRQ-irq-unsafe lock:
(&dev->vqs_list_lock){+.+.}-{3:3}
... which became HARDIRQ-irq-unsafe at:
...
lock_acquire+0x128/0x398
_raw_spin_lock+0x58/0x70
__vring_new_virtqueue+0x130/0x1c0
vring_create_virtqueue+0xc4/0x2b8
vm_find_vqs+0x20c/0x430
init_vq+0x308/0x390
virtblk_probe+0x114/0x9b0
virtio_dev_probe+0x1a4/0x248
really_probe+0xc8/0x3a8
__driver_probe_device+0x84/0x190
driver_probe_device+0x44/0x110
__driver_attach+0x104/0x1e8
bus_for_each_dev+0x7c/0xd0
driver_attach+0x2c/0x38
bus_add_driver+0x1e4/0x258
driver_register+0x6c/0x128
register_virtio_driver+0x2c/0x48
virtio_blk_init+0x70/0xac
do_one_initcall+0x84/0x420
kernel_init_freeable+0x2d0/0x340
kernel_init+0x2c/0x138
ret_from_fork+0x10/0x20
other info that might help us debug this:
Possible interrupt unsafe locking scenario:
CPU0 CPU1
---- ----
lock(&dev->vqs_list_lock);
local_irq_disable();
lock(&channels[i].lock);
lock(&dev->vqs_list_lock);
<Interrupt>
lock(&channels[i].lock);
*** DEADLOCK ***
================
Fixes: 42e90eb53b ("firmware: arm_scmi: Add a virtio channel refcount")
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Link: https://lore.kernel.org/r/20221222183823.518856-6-cristian.marussi@arm.com
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
A misbheaving SCMI platform firmware could reply with out-of-spec
notifications, shorter than the mimimum size comprising a header.
Fixes: d5141f37c4 ("firmware: arm_scmi: Add notifications support in transport layer")
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Link: https://lore.kernel.org/r/20221222183823.518856-4-cristian.marussi@arm.com
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
A misbheaving SCMI platform firmware could reply with out-of-spec messages,
shorter than the mimimum size comprising a header and a status field.
Harden shmem_fetch_response to properly truncate such a bad messages.
Fixes: 5c8a47a5a9 ("firmware: arm_scmi: Make scmi core independent of the transport type")
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Link: https://lore.kernel.org/r/20221222183823.518856-3-cristian.marussi@arm.com
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Stale error status reported from a previous message transaction must be
cleared before starting a new transaction to avoid being confusingly
reported in the following SCMI message dump traces.
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Link: https://lore.kernel.org/r/20221222183823.518856-2-cristian.marussi@arm.com
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Use devres to allocate the dedicated deferred_tx_wq polling workqueue so
as to automatically trigger the proper resource release on error path.
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Fixes: 5a3b7185c4 ("firmware: arm_scmi: Add atomic mode support to virtio transport")
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Link: https://lore.kernel.org/r/20221028140833.280091-6-cristian.marussi@arm.com
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
SCMI virtio transport device managed allocations must use the main
platform device in devres operations instead of the channel devices.
Cc: Peter Hilber <peter.hilber@opensynergy.com>
Fixes: 46abe13b5e ("firmware: arm_scmi: Add virtio transport")
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Link: https://lore.kernel.org/r/20221028140833.280091-5-cristian.marussi@arm.com
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
SCMI Rx channels are optional and they can fail to be setup when not
present but anyway channels setup routines must bail-out on memory errors.
Make channels setup, and related probing, fail when memory errors are
reported on Rx channels.
Fixes: 5c8a47a5a9 ("firmware: arm_scmi: Make scmi core independent of the transport type")
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Link: https://lore.kernel.org/r/20221028140833.280091-4-cristian.marussi@arm.com
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
SCMI transports based on shared memory, at start of transmissions, have
to wait for the shared Tx channel area to be eventually freed by the
SCMI platform before accessing the channel. In fact the channel is owned
by the SCMI platform until marked as free by the platform itself and,
as such, cannot be used by the agent until relinquished.
As a consequence a badly misbehaving SCMI platform firmware could lock
the channel indefinitely and make the kernel side SCMI stack loop
forever waiting for such channel to be freed, possibly hanging the
whole boot sequence.
Add a timeout to the existent Tx waiting spin-loop so that, when the
system ends up in this situation, the SCMI stack can at least bail-out,
nosily warn the user, and abort the transmission.
Reported-by: YaxiongTian <iambestgod@outlook.com>
Suggested-by: YaxiongTian <iambestgod@outlook.com>
Cc: Vincent Guittot <vincent.guittot@linaro.org>
Cc: Etienne Carriere <etienne.carriere@linaro.org>
Cc: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Link: https://lore.kernel.org/r/20221028140833.280091-3-cristian.marussi@arm.com
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Suppress the capability to unbind the core SCMI driver since all the
SCMI stack protocol drivers depend on it.
Fixes: aa4f886f38 ("firmware: arm_scmi: add basic driver infrastructure for SCMI")
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Link: https://lore.kernel.org/r/20221028140833.280091-2-cristian.marussi@arm.com
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Platform drivers .remove callbacks are not supposed to fail and report
errors. Such errors are indeed ignored by the core platform drivers
and the driver unbind process is anyway completed.
The SCMI core platform driver as it is now, instead, bails out reporting
an error in case of an explicit unbind request.
Fix the removal path by adding proper device links between the core SCMI
device and the SCMI protocol devices so that a full SCMI stack unbind is
triggered when the core driver is removed. The remove process does not
bail out anymore on the anomalous conditions triggered by an explicit
unbind but the user is still warned.
Reported-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Link: https://lore.kernel.org/r/20221028140833.280091-1-cristian.marussi@arm.com
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
- Terminate infinite loop in SD-UHS voltage switch
MMC host:
- hsq: Fix kernel crash in the recovery path
- moxart: Fix bus width configurations
- sdhci: Fix kernel panic for cqe irq
ARM_SCMI:
- Fixup clock management by reverting "firmware: arm_scmi: Add clock
management to the SCMI power domain"
-----BEGIN PGP SIGNATURE-----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=F5JH
-----END PGP SIGNATURE-----
Merge tag 'mmc-v6.0-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc
Pull MMC fixes from Ulf Hansson:
"A couple of MMC fixes. This time there is also a fix for the ARM SCMI
firmware driver, which has been acked by Sudeep Holla, the maintainer.
MMC core:
- Terminate infinite loop in SD-UHS voltage switch
MMC host:
- hsq: Fix kernel crash in the recovery path
- moxart: Fix bus width configurations
- sdhci: Fix kernel panic for cqe irq
ARM_SCMI:
- Fixup clock management by reverting 'firmware: arm_scmi: Add clock
management to the SCMI power domain'"
* tag 'mmc-v6.0-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc:
mmc: hsq: Fix data stomping during mmc recovery
Revert "firmware: arm_scmi: Add clock management to the SCMI power domain"
mmc: core: Terminate infinite loop in SD-UHS voltage switch
mmc: moxart: fix 4-bit bus width and remove 8-bit bus width
mmc: sdhci: Fix host->cmd is null
This reverts commit a3b884cef8 ("firmware: arm_scmi: Add clock management
to the SCMI power domain").
Using the GENPD_FLAG_PM_CLK tells genpd to gate/ungate the consumer
device's clock(s) during runtime suspend/resume through the PM clock API.
More precisely, in genpd_runtime_resume() the clock(s) for the consumer
device would become ungated prior to the driver-level ->runtime_resume()
callbacks gets invoked.
This behaviour isn't a good fit for all platforms/drivers. For example, a
driver may need to make some preparations of its device in its
->runtime_resume() callback, like calling clk_set_rate() before the
clock(s) should be ungated. In these cases, it's easier to let the clock(s)
to be managed solely by the driver, rather than at the PM domain level.
For these reasons, let's drop the use GENPD_FLAG_PM_CLK for the SCMI PM
domain, as to enable it to be more easily adopted across ARM platforms.
Fixes: a3b884cef8 ("firmware: arm_scmi: Add clock management to the SCMI power domain")
Cc: Nicolas Pitre <npitre@baylibre.com>
Cc: stable@vger.kernel.org
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Tested-by: Peng Fan <peng.fan@nxp.com>
Acked-by: Sudeep Holla <sudeep.holla@arm.com>
Link: https://lore.kernel.org/r/20220919122033.86126-1-ulf.hansson@linaro.org
Currently, when removing the SCMI PM driver not all the resources
registered with genpd subsystem are properly de-registered.
As a side effect of this after a driver unload/load cycle you get a
splat with a few warnings like this:
| debugfs: Directory 'BIG_CPU0' with parent 'pm_genpd' already present!
| debugfs: Directory 'BIG_CPU1' with parent 'pm_genpd' already present!
| debugfs: Directory 'LITTLE_CPU0' with parent 'pm_genpd' already present!
| debugfs: Directory 'LITTLE_CPU1' with parent 'pm_genpd' already present!
| debugfs: Directory 'LITTLE_CPU2' with parent 'pm_genpd' already present!
| debugfs: Directory 'LITTLE_CPU3' with parent 'pm_genpd' already present!
| debugfs: Directory 'BIG_SSTOP' with parent 'pm_genpd' already present!
| debugfs: Directory 'LITTLE_SSTOP' with parent 'pm_genpd' already present!
| debugfs: Directory 'DBGSYS' with parent 'pm_genpd' already present!
| debugfs: Directory 'GPUTOP' with parent 'pm_genpd' already present!
Add a proper scmi_pm_domain_remove callback to the driver in order to
take care of all the needed cleanups not handled by devres framework.
Link: https://lore.kernel.org/r/20220817172731.1185305-7-cristian.marussi@arm.com
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
SCMI Reset protocol specification allows the asynchronous reset request
only when an autonomous reset action is specified. Reset requests based
on explicit assert/deassert of signals should not be served
asynchronously.
Current implementation will instead issue an asynchronous request in any
case, as long as the reset domain had advertised to support asynchronous
resets.
Avoid requesting the asynchronous resets when the reset action is not
of the autonomous type, even if the target reset domain does, in general,
support the asynchronous requests.
Link: https://lore.kernel.org/r/20220817172731.1185305-6-cristian.marussi@arm.com
Fixes: 95a15d80aa ("firmware: arm_scmi: Add RESET protocol in SCMI v2.0")
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Accessing reset domains descriptors by the index upon the SCMI drivers
requests through the SCMI reset operations interface can potentially
lead to out-of-bound violations if the SCMI driver misbehave.
Add an internal consistency check before any such domains descriptors
accesses.
Link: https://lore.kernel.org/r/20220817172731.1185305-5-cristian.marussi@arm.com
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Accessing sensor domains descriptors by the index upon the SCMI drivers
requests through the SCMI sensor operations interface can potentially
lead to out-of-bound violations if the SCMI driver misbehave.
Add an internal consistency check before any such domains descriptors
accesses.
Link: https://lore.kernel.org/r/20220817172731.1185305-4-cristian.marussi@arm.com
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
SCMI protocols abstract and expose a number of protocol specific
resources like clocks, sensors and so on. Information about such
specific domain resources are generally exposed via an `info_get`
protocol operation.
Improve the sanity check on these operations where needed.
Link: https://lore.kernel.org/r/20220817172731.1185305-3-cristian.marussi@arm.com
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
- Make cpufreq_show_cpus() more straightforward (Viresh Kumar).
- Drop unnecessary CPU hotplug locking from store() used by cpufreq
sysfs attributes (Viresh Kumar).
- Make the ACPI cpufreq driver support the boost control interface on
Zhaoxin/Centaur processors (Tony W Wang-oc).
- Print a warning message on attempts to free an active cpufreq policy
which should never happen (Viresh Kumar).
- Fix grammar in the Kconfig help text for the loongson2 cpufreq
driver (Randy Dunlap).
- Use cpumask_var_t for an on-stack CPU mask in the ondemand cpufreq
governor (Zhao Liu).
- Add trace points for guest_halt_poll_ns grow/shrink to the haltpoll
cpuidle driver (Eiichi Tsukata).
- Modify intel_idle to treat C1 and C1E as independent idle states on
Sapphire Rapids (Artem Bityutskiy).
- Extend support for wakeirq to callback wrappers used during system
suspend and resume (Ulf Hansson).
- Defer waiting for device probe before loading a hibernation image
till the first actual device access to avoid possible deadlocks
reported by syzbot (Tetsuo Handa).
- Unify device_init_wakeup() for PM_SLEEP and !PM_SLEEP (Bjorn
Helgaas).
- Add Raptor Lake-P to the list of processors supported by the Intel
RAPL driver (George D Sworo).
- Add Alder Lake-N and Raptor Lake-P to the list of processors for
which Power Limit4 is supported in the Intel RAPL driver (Sumeet
Pawnikar).
- Make pm_genpd_remove() check genpd_debugfs_dir against NULL before
attempting to remove it (Hsin-Yi Wang).
- Change the Energy Model code to represent power in micro-Watts and
adjust its users accordingly (Lukasz Luba).
- Add new devfreq driver for Mediatek CCI (Cache Coherent
Interconnect) (Johnson Wang).
- Convert the Samsung Exynos SoC Bus bindings to DT schema of
exynos-bus.c (Krzysztof Kozlowski).
- Address kernel-doc warnings by adding the description for unused
fucntion parameters in devfreq core (Mauro Carvalho Chehab).
- Use NULL to pass a null pointer rather than zero according to the
function propotype in imx-bus.c (Colin Ian King).
- Print error message instead of error interger value in
tegra30-devfreq.c (Dmitry Osipenko).
- Add checks to prevent setting negative frequency QoS limits for
CPUs (Shivnandan Kumar).
- Update the pm-graph suite of utilities to the latest revision 5.9
including multiple improvements (Todd Brandt).
- Drop pme_interrupt reference from the PCI power management
documentation (Mario Limonciello).
-----BEGIN PGP SIGNATURE-----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=XeLV
-----END PGP SIGNATURE-----
Merge tag 'pm-5.20-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull power management updates from Rafael Wysocki:
"These are mostly minor improvements all over including new CPU IDs for
the Intel RAPL driver, an Energy Model rework to use micro-Watt as the
power unit, cpufreq fixes and cleanus, cpuidle updates, devfreq
updates, documentation cleanups and a new version of the pm-graph
suite of utilities.
Specifics:
- Make cpufreq_show_cpus() more straightforward (Viresh Kumar).
- Drop unnecessary CPU hotplug locking from store() used by cpufreq
sysfs attributes (Viresh Kumar).
- Make the ACPI cpufreq driver support the boost control interface on
Zhaoxin/Centaur processors (Tony W Wang-oc).
- Print a warning message on attempts to free an active cpufreq
policy which should never happen (Viresh Kumar).
- Fix grammar in the Kconfig help text for the loongson2 cpufreq
driver (Randy Dunlap).
- Use cpumask_var_t for an on-stack CPU mask in the ondemand cpufreq
governor (Zhao Liu).
- Add trace points for guest_halt_poll_ns grow/shrink to the haltpoll
cpuidle driver (Eiichi Tsukata).
- Modify intel_idle to treat C1 and C1E as independent idle states on
Sapphire Rapids (Artem Bityutskiy).
- Extend support for wakeirq to callback wrappers used during system
suspend and resume (Ulf Hansson).
- Defer waiting for device probe before loading a hibernation image
till the first actual device access to avoid possible deadlocks
reported by syzbot (Tetsuo Handa).
- Unify device_init_wakeup() for PM_SLEEP and !PM_SLEEP (Bjorn
Helgaas).
- Add Raptor Lake-P to the list of processors supported by the Intel
RAPL driver (George D Sworo).
- Add Alder Lake-N and Raptor Lake-P to the list of processors for
which Power Limit4 is supported in the Intel RAPL driver (Sumeet
Pawnikar).
- Make pm_genpd_remove() check genpd_debugfs_dir against NULL before
attempting to remove it (Hsin-Yi Wang).
- Change the Energy Model code to represent power in micro-Watts and
adjust its users accordingly (Lukasz Luba).
- Add new devfreq driver for Mediatek CCI (Cache Coherent
Interconnect) (Johnson Wang).
- Convert the Samsung Exynos SoC Bus bindings to DT schema of
exynos-bus.c (Krzysztof Kozlowski).
- Address kernel-doc warnings by adding the description for unused
function parameters in devfreq core (Mauro Carvalho Chehab).
- Use NULL to pass a null pointer rather than zero according to the
function propotype in imx-bus.c (Colin Ian King).
- Print error message instead of error interger value in
tegra30-devfreq.c (Dmitry Osipenko).
- Add checks to prevent setting negative frequency QoS limits for
CPUs (Shivnandan Kumar).
- Update the pm-graph suite of utilities to the latest revision 5.9
including multiple improvements (Todd Brandt).
- Drop pme_interrupt reference from the PCI power management
documentation (Mario Limonciello)"
* tag 'pm-5.20-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (27 commits)
powercap: RAPL: Add Power Limit4 support for Alder Lake-N and Raptor Lake-P
PM: QoS: Add check to make sure CPU freq is non-negative
PM: hibernate: defer device probing when resuming from hibernation
intel_idle: make SPR C1 and C1E be independent
cpufreq: ondemand: Use cpumask_var_t for on-stack cpu mask
cpufreq: loongson2: fix Kconfig "its" grammar
pm-graph v5.9
cpufreq: Warn users while freeing active policy
cpufreq: scmi: Support the power scale in micro-Watts in SCMI v3.1
firmware: arm_scmi: Get detailed power scale from perf
Documentation: EM: Switch to micro-Watts scale
PM: EM: convert power field to micro-Watts precision and align drivers
PM / devfreq: tegra30: Add error message for devm_devfreq_add_device()
PM / devfreq: imx-bus: use NULL to pass a null pointer rather than zero
PM / devfreq: shut up kernel-doc warnings
dt-bindings: interconnect: samsung,exynos-bus: convert to dtschema
PM / devfreq: mediatek: Introduce MediaTek CCI devfreq driver
dt-bindings: interconnect: Add MediaTek CCI dt-bindings
PM: domains: Ensure genpd_debugfs_dir exists before remove
PM: runtime: Extend support for wakeirq for force_suspend|resume
...
In SCMI v3.1 the power scale can be in micro-Watts. The upper layers, e.g.
cpufreq and EM should handle received power values properly (upscale when
needed). Thus, provide an interface which allows to check what is the
scale for power values. The old interface allowed to distinguish between
bogo-Watts and milli-Watts only (which was good for older SCMI spec).
Acked-by: Sudeep Holla <sudeep.holla@arm.com>
Signed-off-by: Lukasz Luba <lukasz.luba@arm.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Add SCMIv3.1 powercap protocol fast channel support using common helpers
provided by the SCMI core with scmi_proto_helpers_ops operations.
Link: https://lore.kernel.org/r/20220704102241.2988447-5-cristian.marussi@arm.com
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Generalize existing fast channel support used in the perf protocol and
make it available to possibly any protocol refactoring the common code
into a couple of new scmi_proto_helpers_ops routines.
Make perf protocol use this new infrastructure.
No functional change.
Link: https://lore.kernel.org/r/20220704102241.2988447-4-cristian.marussi@arm.com
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Add support for SCMI v3.1 powercap protocol, with the exception of powercap
fast channels, exposing all the new related powercap protocol operations as
usual in include/linux/scmi_protocol.h.
Link: https://lore.kernel.org/r/20220704102241.2988447-3-cristian.marussi@arm.com
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Add an SCMI System Power control driver to handle platform's requests
carried by SYSTEM_POWER_STATE_NOTIFIER notifications: such platform
requested system-wide power state transitions are handled accordingly,
gracefully or forcefully, depending on the notifications' message flags.
Graceful requests are relayed to userspace using the same Kernel API used
to handle ACPI Shutdown bus events.
Link: https://lore.kernel.org/r/20220704101933.2981635-5-cristian.marussi@arm.com
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Add a method to get hold of a protocol, causing it to be initialized and
its resource accounting updated, without getting access to its operations
and handle.
Some protocols, like SCMI SystemPower, do not expose any protocol ops to
the kernel OSPM agent but still need to be at least initialized. This
helper avoids the need to invoke a full devm_get_protocol() only to get
the protocol initialized while throwing away unused the protocol ops and
handle.
Link: https://lore.kernel.org/r/20220704101933.2981635-4-cristian.marussi@arm.com
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Add support for SCMIv3.1 System Power optional timeout field while
dispatching SYSTEM_POWER_STATE_NOTIFIER notification.
Link: https://lore.kernel.org/r/20220704101933.2981635-3-cristian.marussi@arm.com
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
In order to minimize SCMI platform fw-side complexity, only one single SCMI
platform should be in charge of SCMI SystemPower protocol communications
with the OSPM. Enforce the existence of one single unique device associated
with SystemPower protocol across any possible number of SCMI platforms, and
warn if a system tries to register different SystemPower devices from
multiple platforms.
Link: https://lore.kernel.org/r/20220704101933.2981635-2-cristian.marussi@arm.com
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Add full message tracing for all transmitted and successfully received SCMI
commands, replies and notifications.
Link: https://lore.kernel.org/r/20220630173135.2086631-3-cristian.marussi@arm.com
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Replace the deprecated ida_simple_{get,remove} with ida_{alloc,free}.
Link: https://lore.kernel.org/r/20220616055052.4559-1-liubo03@inspur.com
Signed-off-by: Bo Liu <liubo03@inspur.com>
[sudeep.holla: Replace ida_alloc_min with ida_alloc as suggested by Cristian]
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Some protocols check the response size with the expected value but optee
shared memory doesn't return such size whereas it is available in the
optee output buffer.
As an example, the base protocol compares the response size with the
expected result when requesting the list of protocol which triggers a
warning with optee shared memory:
arm-scmi firmware:scmi0: Malformed reply - real_sz:116 calc_sz:4 (loop_num_ret:4)
Save the output buffer length and use it when fetching the answer.
Link: https://lore.kernel.org/r/20220624074549.3298-1-vincent.guittot@linaro.org
Reviewed-by: Etienne Carriere <etienne.carriere@linaro.org>
Reviewed-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Vincent Guittot <vincent.guittot@linaro.org>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
A reply to CLOCK_DESCRIBE_RATES issued against a non rate-discrete clock
should be composed of a triplet of rates descriptors (min/max/step)
returned all in one reply message.
This is not always the case when dealing with some SCMI server deployed in
the wild: relax such constraint while maintaining memory safety by checking
carefully the returned payload size.
While at that cleanup a stale debug printout.
Link: https://lore.kernel.org/r/20220616170347.2800771-1-cristian.marussi@arm.com
Fixes: 7bc7caafe6 ("firmware: arm_scmi: Use common iterators in the clock protocol")
Tested-by: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
scmi_voltage_descriptors_get() will incorrecly return an error code if
the last iteration of the for loop that retrieves the descriptors is
skipped due to an error. Skipping an iteration in the loop is not an
error, but the `ret` value from the last iteration will be propagated
when the function returns.
Fix by not saving return values that should not be propagated. This
solution also minimizes the risk of future patches accidentally
re-introducing this bug.
Link: https://lore.kernel.org/r/20220610140055.31491-1-ludvig.parsson@axis.com
Reviewed-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Ludvig Pärsson <ludvig.parsson@axis.com>
[sudeep.holla: Removed unneeded reset_rx_to_maxsz and check for return
value from scmi_voltage_levels_get as suggested by Cristian]
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Commit b260fccaeb ("firmware: arm_scmi: Add SCMI v3.1 protocol extended
names support") moved all the name string buffers to use the extended buffer
size of 64 instead of the required 16 bytes. While that should be fine if
the firmware terminates the string before 16 bytes, there is possibility
of copying random data if the name is not NULL terminated by the firmware.
SCMI base protocol agent_name/vendor_id/sub_vendor_id are defined by the
specification as NULL-terminated ASCII strings up to 16-bytes in length.
The underlying buffers and message descriptors are currently bigger than
needed; resize them to fit only the strictly needed 16 bytes to avoid
any possible leaks when reading data from the firmware.
Change the size argument of strlcpy to use SCMI_SHORT_NAME_MAX_SIZE always
when dealing with short domain names, so as to limit the possibility that
an ill-formed non-NULL terminated short reply from the SCMI platform
firmware can leak stale content laying in the underlying transport shared
memory area.
While at that, convert all strings handling routines to use the preferred
strscpy.
Link: https://lore.kernel.org/r/20220608095530.497879-1-cristian.marussi@arm.com
Fixes: b260fccaeb ("firmware: arm_scmi: Add SCMI v3.1 protocol extended names support")
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Avoid to invoke SENSOR_AXIS_NAME_GET on sensors that have not declared at
least one of their axes as supporting extended names.
Since the returned list of axes supporting extended names is not
necessarily comprising all the existing axes of the specified sensor,
take care also to properly pick the axis descriptor from the ID embedded
in the response.
Link: https://lore.kernel.org/r/20220608164051.2326087-1-cristian.marussi@arm.com
Fixes: 802b0bed01 ("firmware: arm_scmi: Add SCMI v3.1 SENSOR_AXIS_NAME_GET support")
Cc: Peter Hilber <peter.hilber@opensynergy.com>
Cc: Sudeep Holla <sudeep.holla@arm.com>
Reviewed-by: Peter Hilber <peter.hilber@opensynergy.com>
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
While using SCMI iterators helpers a few local automatic variables are
defined but then used only as input for sizeof operators.
cppcheck is fooled to complain about this with:
| drivers/firmware/arm_scmi/sensors.c:341:48: warning: Variable 'msg' is
| not assigned a value. [unassignedVariable]
| struct scmi_msg_sensor_list_update_intervals *msg;
Even though this is an innocuos warning, since the uninitialized variable
is at the end never used in the reported cases, fix these occurences all
over SCMI stack to avoid keeping unneeded objects on the stack.
Link: https://lore.kernel.org/r/20220530115237.277077-1-cristian.marussi@arm.com
Cc: Dan Carpenter <dan.carpenter@oracle.com>
Cc: Sudeep Holla <sudeep.holla@arm.com>
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Even though malformed replies from firmware must be treated carefully to
avoid memory corruption in the kernel, some out-of-spec SCMI replies can
be tolerated to avoid breaking existing deployed system, as long as they
won't cause memory issues.
Relax the sanity checks on the recieved protocol list in the base protocol
to avoid breaking one of the deployed platform whose firmware is not easily
upgradable currently.
Link: https://lore.kernel.org/r/20220523171559.472112-1-cristian.marussi@arm.com
Cc: Etienne Carriere <etienne.carriere@linaro.org>
Cc: Sudeep Holla <sudeep.holla@arm.com>
Reported-by: Nicolas Frattaroli <frattaroli.nicolas@gmail.com>
Tested-By: Frank Wunderlich <frank-w@public-files.de>
Acked-by: Michael Riesch <michael.riesch@wolfvision.net>
Acked-by: Etienne Carriere <etienne.carriere@linaro.org>
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
A few dereferences could happen before the iterator pointer argument was
checked for NULL, causing the following smatch warnings:
drivers/firmware/arm_scmi/driver.c:1214 scmi_iterator_run() warn: variable
dereferenced before check 'i' (see line 1210)
Fix by moving the checks early and dropping some unneeded local references.
No functional change.
Link: https://lore.kernel.org/r/20220503121047.3590340-1-cristian.marussi@arm.com
Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Add support for TEE shared memory in optee scmi transport. When using
tee shared memory, scmi optee transport manages SCMI messages using
msg protocol(from msg.c) in shared memory, whereas smt(from shmem.c)
protocol is used with static IOMEM based shared buffers.
Link: https://lore.kernel.org/r/20220425085127.2009-1-etienne.carriere@linaro.org
Reviewed-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Etienne Carriere <etienne.carriere@linaro.org>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Add SCMI v3.1 voltage protocol support for asynchronous VOLTAGE_LEVEL_SET
command.
Note that, if a voltage domain is advertised to support the asynchronous
version of VOLTAGE_LEVEL_SET, the command will be issued asynchronously
unless explicitly requested to use the synchronous version by setting the
mode to SCMI_VOLTAGE_LEVEL_SET_SYNC when calling voltage_ops->level_set.
The SCMI regulator driver level_set invocation has been left unchanged
so that it will transparently use the asynchronous version if available.
Link: https://lore.kernel.org/r/20220330150551.2573938-21-cristian.marussi@arm.com
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Starting with SCMI v3.1, the PERFORMANCE_LIMITS_SET command allows a user
to request only one between max and min ranges to be changed, while leaving
the other untouched if set to zero in the request. Anyway SCMI v3.1 states
also explicitly that you cannot leave both of those unchanged (zeroed) when
issuing such command, so add a proper check for this condition.
Link: https://lore.kernel.org/r/20220330150551.2573938-23-cristian.marussi@arm.com
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
[sudeep.holla: Dropped check for v3.0 and above to make the check
unconditional, updated the subject accordingly]
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Add SCMI v3.1 internal support for parsing message attributes reporting
the capability of a performance domain to report power-cost in microwatts.
Link: https://lore.kernel.org/r/20220330150551.2573938-22-cristian.marussi@arm.com
Cc: Lukasz Luba <lukasz.luba@arm.com>
Reviewed-by: Lukasz Luba <lukasz.luba@arm.com>
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
SCMI specification defines some commands as optionally issued over multiple
messages in order to overcome possible limitations in payload size enforced
by the configured underlyinng transport.
Introduce some common protocol helpers to provide a unified solution for
issuing such SCMI multi-part commands.
Link: https://lore.kernel.org/r/20220330150551.2573938-14-cristian.marussi@arm.com
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
The clock_enable_latency field in CLOCK_ATTRIBUTES response message has
been added only since SCMI v3.1. Use the advertised SCMI clock protocol
version as a proper condition check for parsing it, instead of the bare
message length lookup.
Link: https://lore.kernel.org/r/20220330150551.2573938-13-cristian.marussi@arm.com
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
As per the spec, the clock_enable_delay is the worst case latency
incurred by the platform to enable the clock. The value of 0 indicates
that the platform doesn't support the same and must be considered as
maximum latency for practical purposes.
Currently the value of 0 is assigned as is and is propogated to the clock
framework which can assume that the clock can support atomic enable operation.
Link: https://lore.kernel.org/r/20220428122913.1654821-1-sudeep.holla@arm.com
Fixes: 18f295b758 ("firmware: arm_scmi: Add support for clock_enable_latency")
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Using the common protocol helper implementation add support for all new
SCMIv3.1 extended names commands related to all protocols with the
exception of SENSOR_AXIS_GET_NAME.
Link: https://lore.kernel.org/r/20220330150551.2573938-12-cristian.marussi@arm.com
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Introduce a new set of common protocol operations bound to the protocol
handle structure so that can be invoked by the protocol implementation code
even when protocols are built as distinct loadable kernel module without
the need of exporting new symbols, like already done with scmi_xfer_ops.
Add at first, as new common protocol helper, an .extended_name_get helper
which will ease implementation and will avoid code duplication when adding
new SCMIv3.1 per-protocol _NAME_GET commands.
Link: https://lore.kernel.org/r/20220330150551.2573938-11-cristian.marussi@arm.com
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Move some SCMI protocol specific definitions from common.h into a the new
dedicated protocols.h header so that SCMI protocols core code can include
only what it needs; this is going to be useful to avoid the risk of growing
indefinitely the dimension of common.h, especially when introducing some
common protocols helper functions.
Header common.h will continue to be included by SCMI core and transport
layers.
Link: https://lore.kernel.org/r/20220330150551.2573938-10-cristian.marussi@arm.com
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
The string array 'name' inside struct scmi_clock_info holds the clock name
which was successfully retrieved by querying the SCMI platform, unless the
related underlying SCMI command failed.
Anyway, such scmi_clock_info structure is allocated using devm_kcalloc()
which in turn internally appends a __GFP_ZERO flag to its invocation:
as a consequence the string 'name' field does not need to be zeroed when
we fail to get the clock name via SCMI, it is already NULL terminated.
Remove unneeded explicit NULL termination.
Link: https://lore.kernel.org/r/20220330150551.2573938-9-cristian.marussi@arm.com
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
When CLOCK_RATE_SET command is issued in asynchronous mode the delayed
response CLOCK_RATE_SET_COMPLETE comes back once the SCMI platform has
effectively operated the requested change: such delayed response carries
also the clock ID and the final clock rate that has been set.
As an aid to debug issues, check that the clock ID in the delayed
response matches the expected one and debug print the rate value.
Link: https://lore.kernel.org/r/20220330150551.2573938-8-cristian.marussi@arm.com
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
A few protocol operations are available that returns a pointer to an
internal character array representing resource name. Make those functions
return a const pointer to such array.
Link: https://lore.kernel.org/r/20220330150551.2573938-7-cristian.marussi@arm.com
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Move away from a statically allocated array for holding the current set of
protocols implemented by the platform in favour of allocating it
dynamically based on the number of protocols effectively advertised by the
platform via BASE protocol exchanges.
While at that, rectify the BASE_DISCOVER_LIST_PROTOCOLS loop iterations to
terminate only when a number of protocols equal to the advertised ones has
been received, instead of looping till the platform returns no more
protocols descriptors. This new behaviour is better compliant with the
specification and it has been tested to work equally well against an SCMI
stack running on top of an official SCP firmware on a JUNO board.
Link: https://lore.kernel.org/r/20220330150551.2573938-6-cristian.marussi@arm.com
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Do not blindly trust SCMI platform response about list of implemented
protocols, instead validate the reported length of the list of protocols
against the real payload size of the message reply.
Link: https://lore.kernel.org/r/20220330150551.2573938-5-cristian.marussi@arm.com
Fixes: b6f20ff8bd ("firmware: arm_scmi: add common infrastructure and support for base protocol")
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
[sudeep.holla: Added early break if loop_num_ret = 0 and simplified calc_list_sz
calculation]
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
While enumerating protocols implemented by the SCMI platform using
BASE_DISCOVER_LIST_PROTOCOLS, the number of returned protocols is
currently validated in an improper way since the check employs a sum
between unsigned integers that could overflow and cause the check itself
to be silently bypassed if the returned value 'loop_num_ret' is big
enough.
Fix the validation avoiding the addition.
Link: https://lore.kernel.org/r/20220330150551.2573938-4-cristian.marussi@arm.com
Fixes: b6f20ff8bd ("firmware: arm_scmi: add common infrastructure and support for base protocol")
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Bail out of protocol initialisation routine early when basic information
about protocol version and attributes could not be retrieved. Failing to
act this way can lead to a successfully initialized SCMI protocol which
is in fact not fully functional.
Link: https://lore.kernel.org/r/20220330150551.2573938-3-cristian.marussi@arm.com
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
The sparse checker complains about converting pointers between address
spaces. We correctly stored an __iomem pointer in struct scmi_optee_channel,
but discarded the __iomem when returning it from get_channel_shm, causing one
warning. Then we passed the non-__iomem pointer return from get_channel_shm
at two other places, where an __iomem pointer is expected, causing couple of
other warnings
Add the appropriate __iomem annotations at all places where it is missing.
optee.c:414:20: warning: incorrect type in return expression (different address spaces)
optee.c:414:20: expected struct scmi_shared_mem *
optee.c:414:20: got struct scmi_shared_mem [noderef] __iomem *shmem
optee.c:426:26: warning: incorrect type in argument 1 (different address spaces)
optee.c:426:26: expected struct scmi_shared_mem [noderef] __iomem *shmem
optee.c:426:26: got struct scmi_shared_mem *shmem
optee.c:441:30: warning: incorrect type in argument 1 (different address spaces)
optee.c:441:30: expected struct scmi_shared_mem [noderef] __iomem *shmem
optee.c:441:30: got struct scmi_shared_mem *shmem
Link: https://lore.kernel.org/r/20220404102419.1159705-1-sudeep.holla@arm.com
Cc: Etienne Carriere <etienne.carriere@linaro.org>
Cc: Cristian Marussi <cristian.marussi@arm.com>
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
During SCMI Clock protocol initialization, after having retrieved from the
SCMI platform all the available discrete rates for a specific clock, the
clock rates array is sorted, unfortunately using a pointer to its end as
a base instead of its start, so that sorting does not work.
Fix invocation of sort() passing as base a pointer to the start of the
retrieved clock rates array.
Link: https://lore.kernel.org/r/20220318092813.49283-1-cristian.marussi@arm.com
Fixes: dccec73de9 ("firmware: arm_scmi: Keep the discrete clock rates sorted")
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
On SCMI transports whose channels are based on a shared resource the TX
channel area has to be acquired by the agent before placing the desired
command into the channel and it will be then relinquished by the platform
once the related reply has been made available into the channel.
On an RX channel the logic is reversed with the platform acquiring the
channel area and the agent reliquishing it once done by calling the
scmi_clear_channel() helper.
As a consequence, even in case of error, the agent must never try to clear
a TX channel from its side: restrict the existing clear channel call on the
the reply path only to delayed responses since they are indeed coming from
the RX channel.
Link: https://lore.kernel.org/r/20220224152404.12877-1-cristian.marussi@arm.com
Fixes: e9b21c9618 ("firmware: arm_scmi: Make .clear_channel optional")
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
There are a few separately maintained driver subsystems that we merge through
the SoC tree, notable changes are:
- Memory controller updates, mainly for Tegra and Mediatek SoCs,
and clarifications for the memory controller DT bindings
- SCMI firmware interface updates, in particular a new transport based
on OPTEE and support for atomic operations.
- Cleanups to the TEE subsystem, refactoring its memory management
For SoC specific drivers without a separate subsystem, changes include
- Smaller updates and fixes for TI, AT91/SAMA5, Qualcomm and NXP
Layerscape SoCs.
- Driver support for Microchip SAMA5D29, Tesla FSD, Renesas RZ/G2L,
and Qualcomm SM8450.
- Better power management on Mediatek MT81xx, NXP i.MX8MQ
and older NVIDIA Tegra chips
-----BEGIN PGP SIGNATURE-----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=Cfbk
-----END PGP SIGNATURE-----
Merge tag 'arm-drivers-5.18' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc
Pull ARM driver updates from Arnd Bergmann:
"There are a few separately maintained driver subsystems that we merge
through the SoC tree, notable changes are:
- Memory controller updates, mainly for Tegra and Mediatek SoCs, and
clarifications for the memory controller DT bindings
- SCMI firmware interface updates, in particular a new transport
based on OPTEE and support for atomic operations.
- Cleanups to the TEE subsystem, refactoring its memory management
For SoC specific drivers without a separate subsystem, changes include
- Smaller updates and fixes for TI, AT91/SAMA5, Qualcomm and NXP
Layerscape SoCs.
- Driver support for Microchip SAMA5D29, Tesla FSD, Renesas RZ/G2L,
and Qualcomm SM8450.
- Better power management on Mediatek MT81xx, NXP i.MX8MQ and older
NVIDIA Tegra chips"
* tag 'arm-drivers-5.18' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (154 commits)
ARM: spear: fix typos in comments
soc/microchip: fix invalid free in mpfs_sys_controller_delete
soc: s4: Add support for power domains controller
dt-bindings: power: add Amlogic s4 power domains bindings
ARM: at91: add support in soc driver for new SAMA5D29
soc: mediatek: mmsys: add sw0_rst_offset in mmsys driver data
dt-bindings: memory: renesas,rpc-if: Document RZ/V2L SoC
memory: emif: check the pointer temp in get_device_details()
memory: emif: Add check for setup_interrupts
dt-bindings: arm: mediatek: mmsys: add support for MT8186
dt-bindings: mediatek: add compatible for MT8186 pwrap
soc: mediatek: pwrap: add pwrap driver for MT8186 SoC
soc: mediatek: mmsys: add mmsys reset control for MT8186
soc: mediatek: mtk-infracfg: Disable ACP on MT8192
soc: ti: k3-socinfo: Add AM62x JTAG ID
soc: mediatek: add MTK mutex support for MT8186
soc: mediatek: mmsys: add mt8186 mmsys routing table
soc: mediatek: pm-domains: Add support for mt8186
dt-bindings: power: Add MT8186 power domains
soc: mediatek: pm-domains: Add support for mt8195
...
An SCMI platform can optionally advertise an enable latency typically
associated with a specific clock resource: add support for parsing such
optional message field and export such information in the usual publicly
accessible clock descriptor.
Link: https://lore.kernel.org/r/20220217131234.50328-8-cristian.marussi@arm.com
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Introduce new _atomic variant for SCMI clock protocol operations related
to enable disable operations: when an atomic operation is required the xfer
poll_completion flag is set for that transaction.
Link: https://lore.kernel.org/r/20220217131234.50328-7-cristian.marussi@arm.com
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
An SCMI agent can be configured system-wide with a well-defined atomic
threshold: only SCMI synchronous command whose latency has been advertised
by the SCMI platform to be lower or equal to this configured threshold will
be considered for atomic operations, when requested and if supported by the
underlying transport at all.
Link: https://lore.kernel.org/r/20220217131234.50328-6-cristian.marussi@arm.com
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Add support for .mark_txdone and .poll_done transport operations to SCMI
VirtIO transport as pre-requisites to enable atomic operations.
Add a Kernel configuration option to enable SCMI VirtIO transport polling
and atomic mode for selected SCMI transactions while leaving it default
disabled.
Link: https://lore.kernel.org/r/20220217131234.50328-4-cristian.marussi@arm.com
Cc: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Igor Skalkin <igor.skalkin@opensynergy.com>
Cc: Peter Hilber <peter.hilber@opensynergy.com>
Cc: virtualization@lists.linux-foundation.org
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Add a new spinlock dedicated to the access of the TX free list and a couple
of helpers to get and put messages back and forth from the free_list.
Link: https://lore.kernel.org/r/20220217131234.50328-3-cristian.marussi@arm.com
Cc: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Igor Skalkin <igor.skalkin@opensynergy.com>
Cc: Peter Hilber <peter.hilber@opensynergy.com>
Cc: virtualization@lists.linux-foundation.org
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Currently SCMI VirtIO channels are marked with a ready flag and related
lock to track channel lifetime and support proper synchronization at
shutdown when virtqueues have to be stopped.
This leads to some extended spinlocked sections with IRQs off on the RX
path to keep hold of the ready flag and does not scale well especially when
SCMI VirtIO polling mode will be introduced.
Add an SCMI VirtIO channel dedicated refcount to track active users on both
the TX and the RX path and properly enforce synchronization and cleanup at
shutdown, inhibiting further usage of the channel once freed.
Link: https://lore.kernel.org/r/20220217131234.50328-2-cristian.marussi@arm.com
Cc: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Igor Skalkin <igor.skalkin@opensynergy.com>
Cc: Peter Hilber <peter.hilber@opensynergy.com>
Cc: virtualization@lists.linux-foundation.org
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
modprobe can't handle spaces in aliases. Get rid of it to fix the issue.
Link: https://lore.kernel.org/r/20220211102704.128354-1-sudeep.holla@arm.com
Fixes: aa4f886f38 ("firmware: arm_scmi: add basic driver infrastructure for SCMI")
Reviewed-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Alyssa Ross <hi@alyssa.is>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
The SMC calling convention designates R0-R7 as input registers in
AArch32 mode, and this conflicts with the compiler's use of R7 as a
frame pointer when building in Thumb2 mode. Generally, we don't enable
the frame pointer, and GCC happily enables the -pg profiling hooks
without them. However, Clang refuses, and errors out with the message
below:
drivers/firmware/arm_scmi/smc.c:152:2: error: write to reserved register 'R7'
arm_smccc_1_1_invoke(scmi_info->func_id, 0, 0, 0, 0, 0, 0, 0, &res);
^
include/linux/arm-smccc.h:550:4: note: expanded from macro 'arm_smccc_1_1_invoke'
arm_smccc_1_1_smc(__VA_ARGS__); \
^
Let's just disable ftrace for the compilation unit when building this
configuration.
Link: https://lore.kernel.org/r/20220203082204.1176734-11-ardb@kernel.org
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Couple of main additions:
- Support for OPTEE based SCMI transport to enable using SCMI service
provided by OPTEE on some platforms
- Support for atomic SCMI transports which enables few SCMI transactions
to be completed in atomic context. This involves other refactoring work
associated with it. It also marks SMC and OPTEE as atomic transport as
the commands are completed once the return
Other changes involves some trace and log enhancements and a miscellaneous
bug fix.
-----BEGIN PGP SIGNATURE-----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=12H2
-----END PGP SIGNATURE-----
Merge tag 'scmi-updates-5.17' of git://git.kernel.org/pub/scm/linux/kernel/git/sudeep.holla/linux into for-next/scmi
Arm SCMI firmware interface updates for v5.17
Couple of main additions:
- Support for OPTEE based SCMI transport to enable using SCMI service
provided by OPTEE on some platforms
- Support for atomic SCMI transports which enables few SCMI transactions
to be completed in atomic context. This involves other refactoring work
associated with it. It also marks SMC and OPTEE as atomic transport as
the commands are completed once the return
Other changes involves some trace and log enhancements and a miscellaneous
bug fix.
* tag 'scmi-updates-5.17' of git://git.kernel.org/pub/scm/linux/kernel/git/sudeep.holla/linux:
firmware: arm_scmi: Add new parameter to mark_txdone
firmware: arm_scmi: Add atomic mode support to smc transport
firmware: arm_scmi: Add support for atomic transports
firmware: arm_scmi: Make optee support sync_cmds_completed_on_ret
firmware: arm_scmi: Make smc support sync_cmds_completed_on_ret
firmware: arm_scmi: Add sync_cmds_completed_on_ret transport flag
firmware: arm_scmi: Make smc transport use common completions
firmware: arm_scmi: Add configurable polling mode for transports
firmware: arm_scmi: Use new trace event scmi_xfer_response_wait
include: trace: Add new scmi_xfer_response_wait event
firmware: arm_scmi: Refactor message response path
firmware: arm_scmi: Set polling timeout to max_rx_timeout_ms
firmware: arm_scmi: Perform earlier cinfo lookup call in do_xfer
firmware: arm_scmi: optee: Drop the support for the OPTEE shared dynamic buffer
firmware: arm_scmi: optee: Fix missing mutex_init()
firmware: arm_scmi: Make virtio Version_1 compliance optional
firmware: arm_scmi: Add optee transport
dt-bindings: arm: Add OP-TEE transport for SCMI
firmware: arm_scmi: Review some virtio log messages
This will enable cleanups down the road.
The idea is to disable cbs, then add "flush_queued_cbs" callback
as a parameter, this way drivers can flush any work
queued after callbacks have been disabled.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Link: https://lore.kernel.org/r/20211013105226.20225-1-mst@redhat.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Add a new xfer parameter to mark_txdone transport operation which enables
the SCMI core to optionally pass back into the transport layer a reference
to the xfer descriptor that is being handled.
Link: https://lore.kernel.org/r/20211220195646.44498-9-cristian.marussi@arm.com
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Add a Kernel configuration option to enable SCMI SMC transport atomic
mode operation for selected SCMI transactions and leave it as default
disabled.
Substitute mutex usages with busy-waiting and declare smc transport as
.atomic_enabled if such Kernel configuration option is enabled.
Link: https://lore.kernel.org/r/20211220195646.44498-8-cristian.marussi@arm.com
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
An SCMI transport can be configured as .atomic_enabled in order to signal
to the SCMI core that all its TX path is executed in atomic context and
that, when requested, polling mode should be used while waiting for command
responses.
When a specific platform configuration had properly configured such a
transport as .atomic_enabled, the SCMI core will also take care not to
sleep in the corresponding RX path while waiting for a response if that
specific command transaction was requested as atomic using polling mode.
Asynchronous commands should not be used in an atomic context and so a
warning is emitted if polling was requested for an asynchronous command.
Add also a method to check, from the SCMI drivers, if the underlying SCMI
transport is currently configured to support atomic transactions: this will
be used by upper layers to determine if atomic requests can be supported at
all on this SCMI instance.
Link: https://lore.kernel.org/r/20211220195646.44498-7-cristian.marussi@arm.com
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Declare each OPTEE SCMI channel as not having a completion_irq so as to
enable polling mode and then enable also .sync_cmds_completed_on_ret flag
in the OPTEE transport descriptor so that real polling is itself
effectively bypassed on the rx path: once the optee command invocation has
successfully returned the core will directly fetch the response from the
shared memory area.
Remove OPTEE SCMI transport specific .poll_done callback support since
real polling is effectively bypassed when .sync_cmds_completed_on_ret is
set.
Add OPTEE SCMI transport specific .mark_txdone callback support in order to
properly handle channel locking along the tx path.
Link: https://lore.kernel.org/r/20211220195646.44498-6-cristian.marussi@arm.com
Cc: Etienne Carriere <etienne.carriere@linaro.org>
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Enable sync_cmds_completed_on_ret in the SMC transport descriptor and
remove SMC specific .poll_done callback support since polling is bypassed
when sync_cmds_completed_on_ret is set.
Link: https://lore.kernel.org/r/20211220195646.44498-5-cristian.marussi@arm.com
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Add a flag to let the transport signal to the core if its handling of sync
command implies that, after .send_message has returned successfully, the
requested command can be assumed to be fully and completely executed on
SCMI platform side so that any possible response value is already
immediately available to be retrieved by a .fetch_response: in other words
the polling phase can be skipped in such a case and the response values
accessed straight away.
Note that all of the above applies only when polling mode of operation was
selected by the core: if instead a completion IRQ was found to be available
the normal response processing path based on completions will still be
followed.
Link: https://lore.kernel.org/r/20211220195646.44498-4-cristian.marussi@arm.com
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
When a completion irq is available use it and delegate command completion
handling to the core SCMI completion mechanism.
If no completion irq is available revert to polling, using the core common
polling machinery.
Link: https://lore.kernel.org/r/20211220195646.44498-3-cristian.marussi@arm.com
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
SCMI communications along TX channels can optionally be provided of a
completion interrupt; when such interrupt is not available, command
transactions should rely on polling, where the SCMI core takes care to
repeatedly evaluate the transport-specific .poll_done() function, if
available, to determine if and when a request was fully completed or
timed out.
Such mechanism is already present and working on a single transfer base:
SCMI protocols can indeed enable hdr.poll_completion on specific commands
ahead of each transfer and cause that transaction to be handled with
polling.
Introduce a couple of flags to be able to enforce such polling behaviour
globally at will:
- scmi_desc.force_polling: to statically switch the whole transport to
polling mode.
- scmi_chan_info.no_completion_irq: to switch a single channel dynamically
to polling mode if, at runtime, is determined that no completion
interrupt was available for such channel.
Link: https://lore.kernel.org/r/20211220195646.44498-2-cristian.marussi@arm.com
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Use new trace event to mark start of waiting for response section.
Link: https://lore.kernel.org/r/20211129191156.29322-6-cristian.marussi@arm.com
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Use transport specific transmission timeout (max_rx_timeout_ms) also for
polling transactions.
Initially when polling mode was added, it was intended to be used only
in scheduler context and hence the choice of 100us for the polling timeout.
However the only user for that was dropped for other SCMI concurrency
issues, so it shouldn't cause any issue to increase this timeout value now.
Link: https://lore.kernel.org/r/20211129191156.29322-3-cristian.marussi@arm.com
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
[sudeep.holla: Updated commit message with historical facts about 100us timeout]
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Lookup cinfo data early in do_xfer so as to avoid any further init work
on xfer structure in case of error.
No functional change.
Link: https://lore.kernel.org/r/20211129191156.29322-2-cristian.marussi@arm.com
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
The shared memory buffer allocated by the optee driver is normal cached
memory and can't be used with IOMEM APIs used in shmem_*.
We currently support only IO memory for shared memory and supporting
normal cached memory needs more changes and needs to be thought through
properly. So for now, let us drop the support for this OPTEE shared buffer.
Link: https://lore.kernel.org/r/20211125150730.188487-1-sudeep.holla@arm.com
Cc: Cristian Marussi <cristian.marussi@arm.com>
Cc: Etienne Carriere <etienne.carriere@linaro.org>
Reviewed-by: Etienne Carriere <etienne.carriere@linaro.org>
Reviewed-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
The driver allocates the mutex but not initialize it.
Use mutex_init() on it to initialize it correctly.
Link: https://lore.kernel.org/r/20211123083620.2366860-1-weiyongjun1@huawei.com
Fixes: 5f90f189a0 ("firmware: arm_scmi: Add optee transport")
Reported-by: Hulk Robot <hulkci@huawei.com>
Reviewed-by: Etienne Carriere <etienne.carriere@linaro.org>
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Introduce a compilation option to disable strict enforcement of compliance
against VirtIO Version_1 backends, so as to allow to support also Legacy
VirtIO devices implementations.
Link: https://lore.kernel.org/r/20211115102910.7639-1-cristian.marussi@arm.com
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Add a new transport channel to the SCMI firmware interface driver for
SCMI message exchange based on optee transport channel. The optee
transport is realized by connecting and invoking OP-TEE SCMI service
interface PTA.
Optee transport support (CONFIG_ARM_SCMI_TRANSPORT_OPTEE) is default
enabled when optee driver (CONFIG_OPTEE) is enabled. Effective optee
transport is setup upon OP-TEE SCMI service discovery at optee
device initialization. For this SCMI UUID is registered to the optee
bus for probing. This is done from the link_supplier operator of the
SCMI optee transport.
The optee transport can use a statically defined shared memory in
which case SCMI device tree node defines it using an "arm,scmi-shmem"
compatible phandle through property shmem. Alternatively, optee transport
allocates the shared memory buffer from the optee driver when no shmem
property is defined.
The protocol used to exchange SCMI message over that shared memory is
negotiated between optee transport driver and the OP-TEE service through
capabilities exchange.
OP-TEE SCMI service is integrated in OP-TEE since its release tag 3.13.0.
The service interface is published in [1].
Link: [1] https://github.com/OP-TEE/optee_os/blob/3.13.0/lib/libutee/include/pta_scmi_client.h
Link: https://lore.kernel.org/r/20211028140009.23331-2-etienne.carriere@linaro.org
Cc: Cristian Marussi <cristian.marussi@arm.com>
Cc: Sudeep Holla <sudeep.holla@arm.com>
Reviewed-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Etienne Carriere <etienne.carriere@linaro.org>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Be more verbose avoiding to use _once flavour of dev_info/_err/_notice.
Remove usage of __func_ to identify which vqueue is referred in some error
messages and explicitly name the TX/RX vqueue.
Link: https://lore.kernel.org/r/20210916103336.7243-1-cristian.marussi@arm.com
Cc: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Sudeep Holla <sudeep.holla@arm.com>
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
of_genpd_add_provider_onecell may return error, so let's propagate
its return value to caller
Link: https://lore.kernel.org/r/20211116064227.20571-1-peng.fan@oss.nxp.com
Fixes: 898216c97e ("firmware: arm_scmi: add device power domain support using genpd")
Signed-off-by: Peng Fan <peng.fan@nxp.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
According to scmi specification, the response of the discover agent request
is made of:
- int32 status
- uint32 agent_id
- uint8 name[16]
but the current implementation doesn't take into account the agent_id field
and only allocates a rx buffer of SCMI_MAX_STR_SIZE length
Allocate the correct length for rx buffer and copy the name from the
correct offset in the response.
While no error were returned until v5.15, v5.16-rc1 fails with virtio_scmi
transport channel:
| arm-scmi firmware:scmi0: SCMI Notifications - Core Enabled.
| arm-scmi firmware:scmi0: SCMI Protocol v2.0 'Linaro:PMWG' Firmware version 0x2090000
| scmi-virtio virtio0: tx:used len 28 is larger than in buflen 24
Link: https://lore.kernel.org/r/20211117081856.9932-1-vincent.guittot@linaro.org
Fixes: b6f20ff8bd ("firmware: arm_scmi: add common infrastructure and support for base protocol")
Tested-by: Cristian Marussi <cristian.marussi@arm.com>
Reviewed-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Vincent Guittot <vincent.guittot@linaro.org>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
During channel setup a failure in the call of scmi_vio_feed_vq_rx() leads
to an attempt to access a dev pointer by dereferencing vioch->cinfo at
a time when vioch->cinfo has still to be initialized.
Fix it by providing the device reference directly to scmi_vio_feed_vq_rx.
Link: https://lore.kernel.org/r/20211112180705.41601-1-cristian.marussi@arm.com
Fixes: 46abe13b5e ("firmware: arm_scmi: Add virtio transport")
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Only one single SCMI Virtio device is currently supported by this driver
and it is referenced using a static global variable which is initialized
once for all during probing and nullified at virtio device removal.
Add proper SMP barriers to protect accesses to such device reference to
ensure that the initialzation state of such device is correctly observed by
all PEs at any time.
Return -EBUSY, instead of -EINVAL, and a descriptive error message if more
than one SCMI Virtio device is ever found and probed.
Link: https://lore.kernel.org/r/20210916103336.7243-3-cristian.marussi@arm.com
Cc: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Sudeep Holla <sudeep.holla@arm.com>
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Remove unneeded nested irqsave/irqrestore spinlocks.
Add also a few descriptive comments to explain better the system behaviour
at shutdown time.
Link: https://lore.kernel.org/r/20210916103336.7243-2-cristian.marussi@arm.com
Cc: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Sudeep Holla <sudeep.holla@arm.com>
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
virtio_scmi_exit() is only called from __exit function, so the annotation
is correct, but when the driver is built-in, the section gets discarded
and the reference from a callback pointer causes a link-time error:
`virtio_scmi_exit' referenced in section `.rodata' of drivers/firmware/arm_scmi/virtio.o:
defined in discarded section `.exit.text' of drivers/firmware/arm_scmi/virtio.o
I could not figure out a better workaround, so let's just remove that
annotation even if it wastes a couple of bytes in .text.
Link: https://lore.kernel.org/r/20210920100301.1466486-2-arnd@kernel.org
Fixes: 46abe13b5e ("firmware: arm_scmi: Add virtio transport")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
ARM_SCMI_TRANSPORT_VIRTIO is a 'bool' Kconfig used to include support for
the SCMI virtio transport inside the core SCMI stack; a bare transport
dependency attached here to this option, though, cannot be properly
propagated to the parent ARM_SCMI_PROTOCOL option and, as a result, it is
currently possible to configure a Kernel where SCMI core is builtin
and includes support for virtio while VirtIO core is =m.
This allowed combination breaks linking:
ARM_SCMI_PROTOCOL=y
ARM_SCMI_TRANSPORT_VIRTIO=y
VIRTIO=m
Bind the dependency in ARM_SCMI_TRANSPORT_VIRTIO to the chosen kind of
compilation of ARM_SCMI_PROTOCOL.
Link: https://lore.kernel.org/r/20210816141609.41751-1-cristian.marussi@arm.com
Fixes: 46abe13b5e ("firmware: arm_scmi: Add virtio transport")
Reported-by: kernel test robot <lkp@intel.com>
Suggested-by: Arnd Bergmann <arnd@kernel.org>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
These are updates for drivers that are tied to a particular SoC,
including the correspondig device tree bindings:
- A couple of reset controller changes for unisoc, uniphier, renesas
and zte platforms
- memory controller driver fixes for omap and tegra
- Rockchip io domain driver updates
- Lots of updates for qualcomm platforms, mostly touching their
firmware and power management drivers
- Tegra FUSE and firmware driver updateѕ
- Support for virtio transports in the SCMI firmware framework
- cleanup of ixp4xx drivers, towards enabling multiplatform
support and bringing it up to date with modern platforms
- Minor updates for keystone, mediatek, omap, renesas.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1
iD8DBQBhLz215t5GS2LDRf4RAjlHAJ473D0PymaTzv68EuPHThG+DEPifQCdGjLq
QGBB6JidIP8rtEdC+LWBB8I=
=M5+N
-----END PGP SIGNATURE-----
Merge tag 'drivers-5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc
Pull ARM SoC driver updates from Arnd Bergmann:
"These are updates for drivers that are tied to a particular SoC,
including the correspondig device tree bindings:
- A couple of reset controller changes for unisoc, uniphier, renesas
and zte platforms
- memory controller driver fixes for omap and tegra
- Rockchip io domain driver updates
- Lots of updates for qualcomm platforms, mostly touching their
firmware and power management drivers
- Tegra FUSE and firmware driver updateѕ
- Support for virtio transports in the SCMI firmware framework
- cleanup of ixp4xx drivers, towards enabling multiplatform support
and bringing it up to date with modern platforms
- Minor updates for keystone, mediatek, omap, renesas"
* tag 'drivers-5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (96 commits)
reset: simple: remove ZTE details in Kconfig help
soc: rockchip: io-domain: Remove unneeded semicolon
soc: rockchip: io-domain: add rk3568 support
dt-bindings: power: add rk3568-pmu-io-domain support
bus: ixp4xx: return on error in ixp4xx_exp_probe()
soc: renesas: Prefer memcpy() over strcpy()
firmware: tegra: Stop using seq_get_buf()
soc/tegra: fuse: Enable fuse clock on suspend for Tegra124
soc/tegra: fuse: Add runtime PM support
soc/tegra: fuse: Clear fuse->clk on driver probe failure
soc/tegra: pmc: Prevent racing with cpuilde driver
soc/tegra: bpmp: Remove unused including <linux/version.h>
dt-bindings: soc: ti: pruss: Add dma-coherent property
soc: ti: Remove pm_runtime_irq_safe() usage for smartreflex
soc: ti: pruss: Enable support for ICSSG subsystems on K3 AM64x SoCs
dt-bindings: soc: ti: pruss: Update bindings for K3 AM64x SoCs
firmware: arm_scmi: Use WARN_ON() to check configured transports
firmware: arm_scmi: Fix boolconv.cocci warnings
soc: mediatek: mmsys: Fix missing UFOE component in mt8173 table routing
soc: mediatek: mmsys: add MT8365 support
...
Use a WARN_ON() when SCMI stack is loaded to check the consistency of
configured SCMI transports instead of the current compile-time check
BUILD_BUG_ON() to avoid breaking bot-builds on random bad configs.
Bail-out early and noisy during SCMI stack initialization if no transport
was enabled in configuration since SCMI cannot work without at least one
enabled transport and such constraint cannot be enforced in Kconfig due to
circular dependency issues.
Link: https://lore.kernel.org/r/20210809092245.8730-1-cristian.marussi@arm.com
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
drivers/firmware/arm_scmi/virtio.c:225:40-45: WARNING: conversion to bool not needed here
Remove unneeded conversion to bool
Semantic patch information:
Relational and logical operators evaluate to bool,
explicit conversion is overly verbose and unneeded.
Generated by: scripts/coccinelle/misc/boolconv.cocci
Link: https://lore.kernel.org/r/20210807173127.GA43248@a24dbc127934
CC: Igor Skalkin <igor.skalkin@opensynergy.com>
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: kernel test robot <lkp@intel.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Mailbox channels for the base protocol are setup during probe.
There can be a scenario where probe fails to acquire the base
protocol due to a timeout leading to cleaning up of all device
managed memory including the scmi_mailbox structure setup during
mailbox_chan_setup function.
| arm-scmi soc:qcom,scmi: timed out in resp(caller: version_get+0x84/0x140)
| arm-scmi soc:qcom,scmi: unable to communicate with SCMI
| arm-scmi: probe of soc:qcom,scmi failed with error -110
Now when a message arrives at cpu slightly after the timeout, the mailbox
controller will try to call the rx_callback of the client and might end
up accessing freed memory.
| rx_callback+0x24/0x160
| mbox_chan_received_data+0x44/0x94
| __handle_irq_event_percpu+0xd4/0x240
This patch frees the mailbox channels setup during probe and adds some more
error handling in case the probe fails.
Link: https://lore.kernel.org/r/1628111999-21595-1-git-send-email-rishabhb@codeaurora.org
Tested-by: Cristian Marussi <cristian.marussi@arm.com>
Reviewed-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Rishabh Bhatnagar <rishabhb@codeaurora.org>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
This transport enables communications with an SCMI platform through virtio;
the SCMI platform will be represented by a virtio device.
Implement an SCMI virtio driver according to the virtio SCMI device spec
[1]. Virtio device id 32 has been reserved for the SCMI device [2].
The virtio transport has one Tx channel (virtio cmdq, A2P channel) and
at most one Rx channel (virtio eventq, P2A channel).
The following feature bit defined in [1] is not implemented:
VIRTIO_SCMI_F_SHARED_MEMORY.
The number of messages which can be pending simultaneously is restricted
according to the virtqueue capacity negotiated at probing time.
As soon as Rx channel message buffers are allocated or have been read
out by the arm-scmi driver, feed them back to the virtio device.
Since some virtio devices may not have the short response time exhibited
by SCMI platforms using other transports, set a generous response
timeout.
SCMI polling mode is not supported by this virtio transport since deemed
meaningless: polling mode operation is offered by the SCMI core to those
transports that could not provide a completion interrupt on the TX path,
which is never the case for virtio whose core callbacks can easily call
into core scmi_rx_callback upon messages reception.
[1] https://github.com/oasis-tcs/virtio-spec/blob/master/virtio-scmi.tex
[2] https://www.oasis-open.org/committees/ballot.php?id=3496
Link: https://lore.kernel.org/r/20210803131024.40280-16-cristian.marussi@arm.com
Cc: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Jason Wang <jasowang@redhat.com>
Co-developed-by: Peter Hilber <peter.hilber@opensynergy.com>
Co-developed-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Igor Skalkin <igor.skalkin@opensynergy.com>
[ Peter: Adapted patch for submission to upstream. ]
Signed-off-by: Peter Hilber <peter.hilber@opensynergy.com>
[ Cristian: simplified driver logic, changed link_supplier and channel
available/setup logic, removed dummy callbacks ]
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Add a new opaque void *priv parameter to scmi_rx_callback which can be
optionally provided by the transport layer when invoking scmi_rx_callback
and that will be passed back to the transport layer in xfer->priv.
This can be used by transports that needs to keep track of their specific
data structures together with the valid xfers.
Link: https://lore.kernel.org/r/20210803131024.40280-15-cristian.marussi@arm.com
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Some transports are also effectively registered with other kernel subsystem
in order to be properly probed and initialized; as a consequence such kind
of transports, and their related devices, might still not have been probed
and initialized at the time the main SCMI core driver is probed.
Add an optional .link_supplier() transport operation which can be used by
the core SCMI stack to dynamically check if the transport is ready and
dynamically link its device to the SCMI platform instance device.
Link: https://lore.kernel.org/r/20210803131024.40280-13-cristian.marussi@arm.com
Signed-off-by: Peter Hilber <peter.hilber@opensynergy.com>
[ Cristian: reworded commit message ]
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Add abstractions for future transports using message passing, such as
virtio. Derive the abstractions from the shared memory abstractions.
Abstract the transport SDU through the opaque struct scmi_msg_payld.
Also enable the transport to determine all other required information
about the transport SDU.
Link: https://lore.kernel.org/r/20210803131024.40280-12-cristian.marussi@arm.com
Signed-off-by: Peter Hilber <peter.hilber@opensynergy.com>
[ Cristian: Adapted to new SCMI Kconfig layout, updated Copyrights ]
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
The maximum number of simultaneously pending messages is a transport
specific quantity that is usually described statically in struct scmi_desc.
Some transports, though, can calculate such number only at run-time after
some initial transport specific setup and probing is completed; moreover
the resulting max message numbers could also be different between rx and
tx channels.
Add an optional get_max_msg() operation so that a transport can report more
accurate max message numbers for each channel type.
The value in scmi_desc.max_msg is still used as default when transport does
not provide any get_max_msg() method.
Link: https://lore.kernel.org/r/20210803131024.40280-11-cristian.marussi@arm.com
Co-developed-by: Peter Hilber <peter.hilber@opensynergy.com>
Co-developed-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Igor Skalkin <igor.skalkin@opensynergy.com>
[ Peter: Adapted patch for submission to upstream. ]
Signed-off-by: Peter Hilber <peter.hilber@opensynergy.com>
[ Cristian: refactored how get_max_msg() is used to minimize core changes ]
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Upcoming new SCMI transports won't need any kind of shared memory support.
Compile shmem.c only if a shmem based transport is selected.
Link: https://lore.kernel.org/r/20210803131024.40280-10-cristian.marussi@arm.com
Co-developed-by: Peter Hilber <peter.hilber@opensynergy.com>
Signed-off-by: Igor Skalkin <igor.skalkin@opensynergy.com>
[ Peter: Adapted patch for submission to upstream. ]
Signed-off-by: Peter Hilber <peter.hilber@opensynergy.com>
[ Cristian: Adapted patch/commit_msg to new SCMI Kconfig layout ]
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Add configuration options to be able to select which SCMI transports have
to be compiled into the SCMI stack.
Mailbox and SMC are by default enabled if their related dependencies are
satisfied.
While doing that move all SCMI related config options in their own
dedicated submenu.
Link: https://lore.kernel.org/r/20210803131024.40280-9-cristian.marussi@arm.com
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Add a check for the presence of .poll_done transport operation so that
transports that do not need to support polling mode have no need to provide
a dummy .poll_done callback either and polling mode can be disabled in the
SCMI core for that tranport.
Link: https://lore.kernel.org/r/20210803131024.40280-8-cristian.marussi@arm.com
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Make transport operation .clear_channel optional since some transports
do not need it and so avoid to have them implement dummy callbacks.
Link: https://lore.kernel.org/r/20210803131024.40280-7-cristian.marussi@arm.com
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Even though in case of asynchronous commands an SCMI platform is
constrained to emit the delayed response message only after the related
message response has been sent, the configured underlying transport could
still deliver such messages together or in inverted order, causing races
due to the concurrent or out-of-order access to the underlying xfer.
Introduce a mechanism to grant exclusive access to an xfer in order to
properly serialize concurrent accesses to the same xfer originating from
multiple correlated messages.
Add additional state information to xfer descriptors so as to be able to
identify out-of-order message deliveries and act accordingly:
- when a delayed response is expected but delivered before the related
response, the synchronous response is considered as successfully
received and the delayed response processing is carried on as usual.
- when/if the missing synchronous response is subsequently received, it
is discarded as not congruent with the current state of the xfer, or
simply, because the xfer has been already released and so, now, the
monotonically increasing sequence number carried by the late response
is stale.
Link: https://lore.kernel.org/r/20210803131024.40280-6-cristian.marussi@arm.com
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Tokens are sequence numbers embedded in the each SCMI message header: they
are used to correlate commands with responses (and delayed responses), but
their usage and policy of selection is entirely up to the caller (usually
the OSPM agent), while they are completely opaque to the callee (i.e. SCMI
platform) which merely copies them back from the command into the response
message header.
This also means that the platform does not, can not and should not enforce
any kind of policy on received messages depending on the contained sequence
number: platform can perfectly handle concurrent requests carrying the same
identifiying token if that should happen.
Moreover the platform is not required to produce in-order responses to
agent requests, the only constraint in these regards is that in case of
an asynchronous message the delayed response must be sent after the
immediate response for the synchronous part of the command transaction.
Currenly the SCMI stack of the OSPM agent selects a token for the egressing
commands picking the lowest possible number which is not already in use by
an existing in-flight transaction, which means, in other words, that we
immediately reuse any token after its transaction has completed or it has
timed out: this policy indeed does simplify management and lookup of tokens
and associated xfers.
Under the above assumptions and constraints, since there is really no state
shared between the agent and the platform to let the platform know when a
token and its associated message has timed out, the current policy of early
reuse of tokens can easily lead to the situation in which a spurious or
late received response (or delayed_response), related to an old stale and
timed out transaction, can be wrongly associated to a newer valid in-flight
xfer that just happens to have reused the same token.
This misbehaviour on such late/spurious responses is more easily exposed on
those transports that naturally have an higher level of parallelism in
processing multiple concurrent in-flight messages.
This commit introduces a new policy of selection of tokens for the OSPM
agent: each new command transfer now gets the next available, monotonically
increasing token, until tokens are exhausted and the counter rolls over.
Such new policy mitigates the above issues with late/spurious responses
since the tokens are now reused as late as possible (when they roll back
ideally) and so it is much easier to identify such late/spurious responses
to stale timed out transactions: this also helps in simplifying the
specific transports implementation since stale transport messages can be
easily identified and discarded early on in the rx path without the need
to cross check their actual state with the core transport layer.
This mitigation is even more effective when, as is usually the case, the
maximum number of pending messages is capped by the platform to a much
lower number than the whole possible range of tokens values (2^10).
This internal policy change in the core SCMI transport layer is fully
transparent to the specific transports so it has not and should not have
any impact on the transports implementation.
Link: https://lore.kernel.org/r/20210803131024.40280-5-cristian.marussi@arm.com
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Some SCMI transport could need to perform some transport specific setup
before they can be used by the SCMI core transport layer: typically this
early setup consists in registering with some other kernel subsystem.
Add the optional capability for a transport to provide a couple of init
and exit functions that are assured to be called early during the SCMI
core initialization phase, well before the SCMI core probing step.
[ Peter: Adapted RFC patch by Cristian for submission to upstream. ]
Link: https://lore.kernel.org/r/20210803131024.40280-4-cristian.marussi@arm.com
Signed-off-by: Peter Hilber <peter.hilber@opensynergy.com>
[ Cristian: Fixed scmi_transports_exit point of invocation ]
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Being a while that we have SCMI trace events in the SCMI stack, remove
this debug helper and its call sites.
Link: https://lore.kernel.org/r/20210803131024.40280-3-cristian.marussi@arm.com
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
The driver core ignores the return value of this callback because there
is only little it can do when a device disappears.
This is the final bit of a long lasting cleanup quest where several
buses were converted to also return void from their remove callback.
Additionally some resource leaks were fixed that were caused by drivers
returning an error code in the expectation that the driver won't go
away.
With struct bus_type::remove returning void it's prevented that newly
implemented buses return an ignored error code and so don't anticipate
wrong expectations for driver authors.
Reviewed-by: Tom Rix <trix@redhat.com> (For fpga)
Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Reviewed-by: Cornelia Huck <cohuck@redhat.com> (For drivers/s390 and drivers/vfio)
Acked-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk> (For ARM, Amba and related parts)
Acked-by: Mark Brown <broonie@kernel.org>
Acked-by: Chen-Yu Tsai <wens@csie.org> (for sunxi-rsb)
Acked-by: Pali Rohár <pali@kernel.org>
Acked-by: Mauro Carvalho Chehab <mchehab@kernel.org> (for media)
Acked-by: Hans de Goede <hdegoede@redhat.com> (For drivers/platform)
Acked-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Acked-By: Vinod Koul <vkoul@kernel.org>
Acked-by: Juergen Gross <jgross@suse.com> (For xen)
Acked-by: Lee Jones <lee.jones@linaro.org> (For mfd)
Acked-by: Johannes Thumshirn <jth@kernel.org> (For mcb)
Acked-by: Johan Hovold <johan@kernel.org>
Acked-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> (For slimbus)
Acked-by: Kirti Wankhede <kwankhede@nvidia.com> (For vfio)
Acked-by: Maximilian Luz <luzmaximilian@gmail.com>
Acked-by: Heikki Krogerus <heikki.krogerus@linux.intel.com> (For ulpi and typec)
Acked-by: Samuel Iglesias Gonsálvez <siglesias@igalia.com> (For ipack)
Acked-by: Geoff Levand <geoff@infradead.org> (For ps3)
Acked-by: Yehezkel Bernat <YehezkelShB@gmail.com> (For thunderbolt)
Acked-by: Alexander Shishkin <alexander.shishkin@linux.intel.com> (For intel_th)
Acked-by: Dominik Brodowski <linux@dominikbrodowski.net> (For pcmcia)
Acked-by: Rafael J. Wysocki <rafael@kernel.org> (For ACPI)
Acked-by: Bjorn Andersson <bjorn.andersson@linaro.org> (rpmsg and apr)
Acked-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> (For intel-ish-hid)
Acked-by: Dan Williams <dan.j.williams@intel.com> (For CXL, DAX, and NVDIMM)
Acked-by: William Breathitt Gray <vilhelm.gray@gmail.com> (For isa)
Acked-by: Stefan Richter <stefanr@s5r6.in-berlin.de> (For firewire)
Acked-by: Benjamin Tissoires <benjamin.tissoires@redhat.com> (For hid)
Acked-by: Thorsten Scherer <t.scherer@eckelmann.de> (For siox)
Acked-by: Sven Van Asbroeck <TheSven73@gmail.com> (For anybuss)
Acked-by: Ulf Hansson <ulf.hansson@linaro.org> (For MMC)
Acked-by: Wolfram Sang <wsa@kernel.org> # for I2C
Acked-by: Sudeep Holla <sudeep.holla@arm.com>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Acked-by: Finn Thain <fthain@linux-m68k.org>
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Link: https://lore.kernel.org/r/20210713193522.1770306-6-u.kleine-koenig@pengutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
SCMI message headers carry a sequence number and such field is sized to
allow for MSG_TOKEN_MAX distinct numbers; moreover zero is not really an
acceptable maximum number of pending in-flight messages.
Fix accordingly the checks performed on the value exported by transports
in scmi_desc.max_msg
Link: https://lore.kernel.org/r/20210712141833.6628-3-cristian.marussi@arm.com
Reported-by: Vincent Guittot <vincent.guittot@linaro.org>
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
[sudeep.holla: updated the patch title and error message]
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
scmi_resp_sensor_reading_complete structure is meant to represent an
SCMI asynchronous reading complete message. The readings field with
a 64bit type forces padding and breaks reads in scmi_sensor_reading_get.
Split it in two adjacent 32bit readings_low/high subfields to avoid the
padding within the structure. Alternatively we could to mark the structure
packed.
Link: https://lore.kernel.org/r/20210628170042.34105-1-cristian.marussi@arm.com
Fixes: e2083d3673 ("firmware: arm_scmi: Add SCMI v3.0 sensors timestamped reads")
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
