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path: root/include/linux/interconnect-provider.h
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2020-09-18Merge branch 'icc-syncstate' into icc-nextGeorgi Djakov1-0/+7
* icc-syncstate: interconnect: Add get_bw() callback interconnect: Add sync state support interconnect: qcom: Use icc_sync_state Signed-off-by: Georgi Djakov <georgi.djakov@linaro.org>
2020-09-18interconnect: Add sync state supportGeorgi Djakov1-0/+5
The bootloaders often do some initial configuration of the interconnects in the system and we want to keep this configuration until all consumers have probed and expressed their bandwidth needs. This is because we don't want to change the configuration by starting to disable unused paths until every user had a chance to request the amount of bandwidth it needs. To accomplish this we will implement an interconnect specific sync_state callback which will synchronize (aggregate and set) the current bandwidth settings when all consumers have been probed. Link: https://lore.kernel.org/r/20200825170152.6434-3-georgi.djakov@linaro.org Reviewed-by: Saravana Kannan <saravanak@google.com> Signed-off-by: Georgi Djakov <georgi.djakov@linaro.org>
2020-09-18interconnect: Add get_bw() callbackGeorgi Djakov1-0/+2
The interconnect controller hardware may support querying the current bandwidth settings, so add a callback for providers to implement this functionality if supported. Link: https://lore.kernel.org/r/20200825170152.6434-2-georgi.djakov@linaro.org Reviewed-by: Saravana Kannan <saravanak@google.com> Signed-off-by: Georgi Djakov <georgi.djakov@linaro.org>
2020-09-08interconnect: Introduce xlate_extended() callbackGeorgi Djakov1-2/+15
Currently there is the xlate() callback, which is used by providers for mapping the nodes from phandle arguments. That's fine for simple mappings, but the phandle arguments could contain an additional data, such as tag information. Let's create another callback xlate_extended() for the cases where providers want also populate the path tag data. Tested-by: Sibi Sankar <sibis@codeaurora.org> Reviewed-by: Sibi Sankar <sibis@codeaurora.org> Reviewed-by: Matthias Kaehlcke <mka@chromium.org> Tested-by: Matthias Kaehlcke <mka@chromium.org> Link: https://lore.kernel.org/r/20200903133134.17201-2-georgi.djakov@linaro.org Signed-off-by: Georgi Djakov <georgi.djakov@linaro.org>
2020-06-16interconnect: Mark all dummy functions as static inlineGeorgi Djakov1-4/+4
There are a few dummy stub functions that are not marked as static inline yet. Currently this header file is not included in any other file outside of drivers/interconnect/, but that might not be the case in the future. If this file gets included and the framework is disabled, we will be see warnings. Let's fix this in advance. Link: https://lore.kernel.org/r/20200228145945.13579-1-georgi.djakov@linaro.org Signed-off-by: Georgi Djakov <georgi.djakov@linaro.org>
2020-06-16interconnect: Allow inter-provider pairs to be configuredArtur Świgoń1-0/+2
This patch adds support for a new boolean 'inter_set' field in struct icc_provider. Setting it to 'true' enables calling '->set' for inter-provider node pairs. All existing users of the interconnect framework allocate this structure with kzalloc, and are therefore unaffected by this change. This makes it easier for hierarchies like exynos-bus, where every bus is probed separately and registers a separate interconnect provider, to model constraints between buses. Signed-off-by: Artur Świgoń <a.swigon@samsung.com> Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com> Acked-by: Krzysztof Kozlowski <krzk@kernel.org> Link: https://lore.kernel.org/r/20200521122841.8867-4-s.nawrocki@samsung.com Signed-off-by: Georgi Djakov <georgi.djakov@linaro.org>
2020-06-16interconnect: Export of_icc_get_from_provider()Artur Świgoń1-0/+6
This patch makes the above function public (for use in exynos-bus devfreq driver). Signed-off-by: Artur Świgoń <a.swigon@samsung.com> Reviewed-by: Krzysztof Kozlowski <krzk@kernel.org> Reviewed-by: Chanwoo Choi <cw00.choi@samsung.com> Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com> Link: https://lore.kernel.org/r/20200521122841.8867-2-s.nawrocki@samsung.com Signed-off-by: Georgi Djakov <georgi.djakov@linaro.org>
2019-12-16interconnect: Add a common standard aggregate functionGeorgi Djakov1-0/+8
Currently there is one very standard aggregation method that is used by several drivers. Let's add this as a common function, so that drivers could just point to it, instead of copy/pasting code. Suggested-by: Evan Green <evgreen@chromium.org> Reviewed-by: Brian Masney <masneyb@onstation.org> Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org> Reviewed-by: Evan Green <evgreen@chromium.org> Signed-off-by: Georgi Djakov <georgi.djakov@linaro.org>
2019-12-16interconnect: Add a common helper for removing all nodesGeorgi Djakov1-0/+6
The removal of all nodes from a provider seem to be a common functionality for all existing users and it would make sense to factor out this into a a common helper function. Suggested-by: Dmitry Osipenko <digetx@gmail.com> Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org> Signed-off-by: Georgi Djakov <georgi.djakov@linaro.org>
2019-08-13interconnect: Add pre_aggregate() callbackGeorgi Djakov1-0/+3
Introduce an optional callback in interconnect provider drivers. It can be used for implementing actions, that need to be executed before the actual aggregation of the bandwidth requests has started. The benefit of this for now is that it will significantly simplify the code in provider drivers. Suggested-by: Evan Green <evgreen@chromium.org> Reviewed-by: Evan Green <evgreen@chromium.org> Signed-off-by: Georgi Djakov <georgi.djakov@linaro.org>
2019-08-13interconnect: Add support for path tagsGeorgi Djakov1-2/+2
Consumers may have use cases with different bandwidth requirements based on the system or driver state. The consumer driver can append a specific tag to the path and pass this information to the interconnect platform driver to do the aggregation based on this state. Introduce icc_set_tag() function that will allow the consumers to append an optional tag to each path. The aggregation of these tagged paths is platform specific. Reviewed-by: Evan Green <evgreen@chromium.org> Signed-off-by: Georgi Djakov <georgi.djakov@linaro.org>
2019-01-22interconnect: Allow endpoints translation via DTGeorgi Djakov1-0/+17
Currently we support only platform data for specifying the interconnect endpoints. As now the endpoints are hard-coded into the consumer driver this may lead to complications when a single driver is used by multiple SoCs, which may have different interconnect topology. To avoid cluttering the consumer drivers, introduce a translation function to help us get the board specific interconnect data from device-tree. Reviewed-by: Evan Green <evgreen@chromium.org> Signed-off-by: Georgi Djakov <georgi.djakov@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-01-22interconnect: Add generic on-chip interconnect APIGeorgi Djakov1-0/+125
This patch introduces a new API to get requirements and configure the interconnect buses across the entire chipset to fit with the current demand. The API is using a consumer/provider-based model, where the providers are the interconnect buses and the consumers could be various drivers. The consumers request interconnect resources (path) between endpoints and set the desired constraints on this data flow path. The providers receive requests from consumers and aggregate these requests for all master-slave pairs on that path. Then the providers configure each node along the path to support a bandwidth that satisfies all bandwidth requests that cross through that node. The topology could be complicated and multi-tiered and is SoC specific. Reviewed-by: Evan Green <evgreen@chromium.org> Signed-off-by: Georgi Djakov <georgi.djakov@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>