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* Check for errors returned by qcom_icc_rpm_smd_send(). * Fix the header guard to reflect the path in smd-rpm.h. * Add new icc_node_del() function to delete nodes from provider. * Change mutex_init to mutex_lock in icc_provider_add(). * Add missing kfree() in icc_node_create(). * Fix krealloc() usage in icc_link_destroy(). * Return fixed errors in icc_link_destroy(). * Rename *_remove() functions to *_destroy(). * Rename path_allocate() to path_init() with minor refactoring. * Optimize locking and move to higher level. * Fix the modular build, make rpm-smd driver a module. * Sync interconnect requests with the idle state of the device. * Cache the path between the nodes instead of walking the graph on each get(). * Convert from using global node identifiers to local per provider ids. * Create icc_set_extended() to handle parameters such as latency and other | CPUs | | | GPU | | DSP | | Masters |->| P NoC |->| Slaves | The topology could be complicated and multi-tiered and is SoCīelow is a simplified diagram of a real-world SoC topology. Topology node according to the requested data flow path, physical links andĬonstraints. Then the providers configure each participating in the
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Requests from consumers and aggregate these requests for all master-slave The desired constraints on this data flow path. The consumers request interconnect resources (path) to an endpoint and set The interconnect buses and the consumers could be various drivers. The API is using a consumer/provider-based model, where the providers are The API is NOT for changing the performance of the endpoint devices, but only Interconnect buses across the entire chipset to fit with the current demand. This patchset introduce a new API to get the requirement and configure the
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Platforms or a dynamic set of operations that happen at run-time. This configuration can be a static, one-time operation done at boot for some Scaling the frequencies, setting link priority and tuning QoS parameters. Having an API to control the requirement of the system in terms of bandwidthĪnd QoS, so we can adapt the interconnect configuration to match those by Use case like video playback or CPU intensive tasks. Throughput but it is not necessary all the time and consume a lot of power.įurthermore, the priority between masters can vary depending on the running These buses have been sized usually to handle use cases with high data Hierarchical buses or use the network-on-chip concept. These interconnectīuses could form different topologies such as crossbar, point to point buses, Lot of data flowing through the on-chip interconnects. These cores are talking to each other and can generate a Modern SoCs have multiple processors and various dedicated cores (video, gpu, Linux-arm-kernel, linux-arm-msm, georgi.djakov Skannan, bjorn.andersson, amit.kucheria, seansw, daidavid1,Įvgreen, mka, tland, lorenzo.pieralisi, linux-kernel, Introduce on-chip interconnect API All of help / color / mirror / Atom feed * Introduce on-chip interconnect API 15:50 ` Georgi Djakov 0 siblings, 0 replies 55+ messages in threadįrom: Georgi Djakov 15:50 UTC ( / raw)Ĭc: rjw, robh+dt, mturquette, khilman, abailon, vincent.guittot,