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linux/drivers/interconnect/Makefile

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interconnect: Add generic on-chip interconnect API 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>
2019-01-16 09:10:56 -07:00
# SPDX-License-Identifier: GPL-2.0
interconnect: Add basic tracepoints The tracepoints can help with understanding the system behavior of a given interconnect path when the consumer drivers change their bandwidth demands. This might be interesting when we want to monitor the requested interconnect bandwidth for each client driver. The paths may share the same nodes and this will help to understand "who and when is requesting what". All this is useful for subsystem drivers developers and may also provide hints when optimizing the power and performance profile of the system. Reviewed-by: Steven Rostedt (VMware) <rostedt@goodmis.org> Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org> Signed-off-by: Georgi Djakov <georgi.djakov@linaro.org>
2019-11-28 07:18:18 -07:00
CFLAGS_core.o := -I$(src)
interconnect: Add debugfs test client It's often useful during test, debug, and development to issue path votes from shell. Add a debugfs client for this purpose. Example usage: cd /sys/kernel/debug/interconnect/test-client/ # Configure node endpoints for the path from CPU to DDR on # qcom/sm8550. echo chm_apps > src_node echo ebi > dst_node # Get path between src_node and dst_node. This is only # necessary after updating the node endpoints. echo 1 > get # Set desired BW to 1GBps avg and 2GBps peak. echo 1000000 > avg_bw echo 2000000 > peak_bw # Vote for avg_bw and peak_bw on the latest path from "get". # Voting for multiple paths is possible by repeating this # process for different nodes endpoints. echo 1 > commit Allowing userspace to directly enable and set bus rates can be dangerous So, following in the footsteps of the regmap [0] and clk [1] frameworks, keep these userspace controls compile-time disabled without Kconfig options to enable them. Enabling this will require code changes to define INTERCONNECT_ALLOW_WRITE_DEBUGFS. [0] commit 09c6ecd39410 ("regmap: Add support for writing to regmap registers via debugfs") [1] commit 37215da5553e ("clk: Add support for setting clk_rate via debugfs") Signed-off-by: Mike Tipton <quic_mdtipton@quicinc.com> Link: https://lore.kernel.org/r/20230807142914.12480-4-quic_mdtipton@quicinc.com Signed-off-by: Georgi Djakov <djakov@kernel.org>
2023-08-07 07:29:14 -07:00
icc-core-objs := core.o bulk.o debugfs-client.o
interconnect: Add generic on-chip interconnect API 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>
2019-01-16 09:10:56 -07:00
obj-$(CONFIG_INTERCONNECT) += icc-core.o
interconnect: Add imx core driver This adds support for i.MX SoC family to interconnect framework. Platform drivers can describe the interconnect graph and several adjustment knobs where icc node bandwidth is converted to a DEV_PM_QOS_MIN_FREQUENCY request. The interconnect provider is probed through the main NOC device and other adjustable nodes on the same graph are found from a fsl,scalable-nodes phandle array property. Signed-off-by: Alexandre Bailon <abailon@baylibre.com> Signed-off-by: Leonard Crestez <leonard.crestez@nxp.com> Tested-by: Martin Kepplinger <martin.kepplinger@puri.sm> Link: https://lore.kernel.org/r/35920e673df6c04cbbb7d877a7d4ba25fd91a784.1586174566.git.leonard.crestez@nxp.com Signed-off-by: Georgi Djakov <georgi.djakov@linaro.org>
2020-04-28 10:03:02 -07:00
obj-$(CONFIG_INTERCONNECT_IMX) += imx/
interconnect: mediatek: Add MediaTek MT8183/8195 EMI Interconnect driver Add an interconnect driver for the External Memory Interface (EMI), voting for bus bandwidth over the Dynamic Voltage and Frequency Scaling Resource Collector (DVFSRC). ICC provider ICC Nodes ---- ---- --------- |CPU | |--- |VPU | ----- | |----- ---- | ---- |DRAM |--|DRAM | ---- | ---- | |--|scheduler|----- |GPU | |--- |DISP| | |--|(EMI) | ---- | ---- | |--| | ----- | ---- ----- | |----- |MMSYS|--|--- |VDEC| --------- ----- | ---- /|\ | ---- |change DRAM freq |--- |VENC| ---------- | ---- | DVFSR | | | | | ---- ---------- |--- |IMG | | ---- | ---- |--- |CAM | ---- Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> Link: https://lore.kernel.org/r/20240610085735.147134-8-angelogioacchino.delregno@collabora.com Signed-off-by: Georgi Djakov <djakov@kernel.org>
2024-06-10 01:57:35 -07:00
obj-$(CONFIG_INTERCONNECT_MTK) += mediatek/
interconnect: qcom: Add sdm845 interconnect provider driver Introduce Qualcomm SDM845 specific provider driver using the interconnect framework. Signed-off-by: David Dai <daidavid1@codeaurora.org> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Georgi Djakov <georgi.djakov@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-01-16 09:11:00 -07:00
obj-$(CONFIG_INTERCONNECT_QCOM) += qcom/
interconnect: Add generic interconnect driver for Exynos SoCs This patch adds a generic interconnect driver for Exynos SoCs in order to provide interconnect functionality for each "samsung,exynos-bus" compatible device. The SoC topology is a graph (or more specifically, a tree) and its edges are described by specifying in the 'interconnects' property the interconnect consumer path for each interconnect provider DT node. Each bus is now an interconnect provider and an interconnect node as well (cf. Documentation/interconnect/interconnect.rst), i.e. every bus registers itself as a node. Node IDs are not hard coded but rather assigned dynamically at runtime. This approach allows for using this driver with various Exynos SoCs. Frequencies requested via the interconnect API for a given node are propagated to devfreq using dev_pm_qos_update_request(). Please note that it is not an error when CONFIG_INTERCONNECT is 'n', in which case all interconnect API functions are no-op. The samsung,data-clk-ratio DT property is used to specify the ratio of the interconect bandwidth to the minimum data clock frequency for each bus. Due to unspecified relative probing order, -EPROBE_DEFER may be propagated to ensure that the parent is probed before its children. Reviewed-by: Chanwoo Choi <cw00.choi@samsung.com> Tested-by: Chanwoo Choi <cw00.choi@samsung.com> Acked-by: Krzysztof Kozlowski <krzk@kernel.org> Signed-off-by: Artur Świgoń <a.swigon@samsung.com> Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com> Link: https://lore.kernel.org/r/20201112140931.31139-3-s.nawrocki@samsung.com Signed-off-by: Georgi Djakov <georgi.djakov@linaro.org>
2020-11-12 07:09:28 -07:00
obj-$(CONFIG_INTERCONNECT_SAMSUNG) += samsung/
interconnect: add clk-based icc provider support For some devices it is useful to export clocks as interconnect providers, if the clock corresponds to bus bandwidth. For example, on MSM8996 the cluster interconnect clock should be scaled according to the cluster frequencies. Exporting it as an interconnect allows one to properly describe this as the cluster bandwidth requirements. Tested-by: Yassine Oudjana <y.oudjana@protonmail.com> Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org> Link: https://lore.kernel.org/r/20230512001334.2983048-3-dmitry.baryshkov@linaro.org Signed-off-by: Georgi Djakov <djakov@kernel.org>
2023-05-11 17:13:32 -07:00
obj-$(CONFIG_INTERCONNECT_CLK) += icc-clk.o
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