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Date: Mon, 25 Jul 2022 15:52:59 +0900 From: Jiho Chu <jiho.chu@...sung.com> To: gregkh@...uxfoundation.org, arnd@...db.de, linux-kernel@...r.kernel.org Cc: yelini.jeong@...sung.com, myungjoo.ham@...sung.com, Jiho Chu <jiho.chu@...sung.com> Subject: [PATCH 0/9] Samsung Trinity NPU device driver Hello, My name is Jiho Chu, and working for device driver and system daemon for several years at Samsung Electronics. Trinity Neural Processing Unit (NPU) series are hardware accelerators for neural network processing in embedded systems, which are integrated into application processors or SoCs. Trinity NPU is compatible with AMBA bus architecture and first launched in 2018 with its first version for vision processing, Trinity Version1 (TRIV1). Its second version, TRIV2, is released in Dec, 2021. Another Trinity NPU for audio processing is referred as TRIA. TRIV2 is shipped for many models of 2022 Samsung TVs, providing acceleration for various AI-based applications, which include image recognition and picture quality improvements for streaming video, which can be accessed via GStreamer and its neural network plugins, NNStreamer. In this patch set, it includes Trinity Vision 2 kernel device driver. Trinity Vision 2 supports accelerating image inference process for Convolution Neural Network (CNN). The CNN workload is executed by Deep Learning Accelerator (DLA), and general Neural Network Layers are executed by Digital Signal Processor (DSP). And there is a Control Processor (CP) which can control DLA and DSP. These three IPs (DLA, DSP, CP) are composing Trinity Vision 2 NPU, and the device driver mainly supervise the CP to manage entire NPU. Controlling DLA and DSP operations is performed with internal command instructions. and the instructions for the Trinity is similar with general processor's ISA, but it is specialized for Neural Processing operations. The virtual ISA (vISA) is designed for calculating multiple data with single operation, like modern SIMD processor. The device driver loads a program to CP at start up, and the program can decode a binary which is built with the vISA. We calls this decoding program as a Instruction Decoding Unit (IDU) program. While running the NPU, the CP executes IDU program to fetch and decode instructions which made up of vISA, by the scheduling policy of the device driver. These DLA, DSP and CP are loosely coupled using ARM's AMBA, so the Trinity can easily communicate with most ARM processors. Each IPs designed to have memory-mapped registers which can be used to control the IP, and the CP provides Wait-For-Event (WFE) operation to subscribe interrupt signals from the DLA and DSP. Also, embedded Direct Memory Access Controller (DMAC) manages data communications between internal SRAM and outer main memory, IOMMU module supports unified memory space. A user can control the Trinity NPU with IOCTLs provided by driver. These controls includes memory management operations to transfer model data (HWMEM_ALLOC/HWMEM_DEALLOC), NPU workload control operations to submit workload (RUN/STOP), and statistics operations to check current NPU status. (STAT) The device driver also implemented features for developers. It provides sysfs control attributes like stop, suspend, sched_test, and profile. Also, it provides status attributes like app status, a number of total requests, a number of active requests and memory usages. For the tracing operations, several ftrace events are defined and embedded for several important points. I would highly appreciate your feedback. Review, question or anythings. Thanks. Jiho Chu Jiho Chu (9): trinity: Add base driver tirnity: Add dma memory module trinity: Add load/unload IDU files trinity: Add schduler module trinity: Add sysfs debugfs module trinity: Add pm and ioctl feature trinity: Add profile module trinity: Add trace module MAINTAINERS: add TRINITY driver MAINTAINERS | 7 + drivers/misc/Kconfig | 1 + drivers/misc/Makefile | 1 + drivers/misc/trinity/Kconfig | 27 + drivers/misc/trinity/Makefile | 12 + drivers/misc/trinity/sched/core.c | 170 ++ drivers/misc/trinity/sched/priority.c | 335 +++ drivers/misc/trinity/sched/priority.h | 18 + drivers/misc/trinity/sched/sched.h | 52 + drivers/misc/trinity/trinity.c | 1282 +++++++++++ drivers/misc/trinity/trinity_common.h | 434 ++++ drivers/misc/trinity/trinity_debug.c | 358 ++++ drivers/misc/trinity/trinity_hwmem.c | 438 ++++ drivers/misc/trinity/trinity_hwmem.h | 45 + drivers/misc/trinity/trinity_pm.c | 76 + drivers/misc/trinity/trinity_resv_mem.c | 264 +++ drivers/misc/trinity/trinity_resv_mem.h | 41 + drivers/misc/trinity/trinity_stat.c | 893 ++++++++ drivers/misc/trinity/trinity_stat.h | 56 + drivers/misc/trinity/trinity_sysfs.c | 864 ++++++++ drivers/misc/trinity/trinity_trace.c | 15 + drivers/misc/trinity/trinity_trace.h | 406 ++++ drivers/misc/trinity/trinity_vision2_drv.c | 1893 +++++++++++++++++ .../misc/trinity/trinity_vision2_profile.h | 324 +++ drivers/misc/trinity/trinity_vision2_regs.h | 210 ++ include/uapi/misc/trinity.h | 458 ++++ 26 files changed, 8680 insertions(+) create mode 100644 drivers/misc/trinity/Kconfig create mode 100644 drivers/misc/trinity/Makefile create mode 100644 drivers/misc/trinity/sched/core.c create mode 100644 drivers/misc/trinity/sched/priority.c create mode 100644 drivers/misc/trinity/sched/priority.h create mode 100644 drivers/misc/trinity/sched/sched.h create mode 100644 drivers/misc/trinity/trinity.c create mode 100644 drivers/misc/trinity/trinity_common.h create mode 100644 drivers/misc/trinity/trinity_debug.c create mode 100644 drivers/misc/trinity/trinity_hwmem.c create mode 100644 drivers/misc/trinity/trinity_hwmem.h create mode 100644 drivers/misc/trinity/trinity_pm.c create mode 100644 drivers/misc/trinity/trinity_resv_mem.c create mode 100644 drivers/misc/trinity/trinity_resv_mem.h create mode 100644 drivers/misc/trinity/trinity_stat.c create mode 100644 drivers/misc/trinity/trinity_stat.h create mode 100644 drivers/misc/trinity/trinity_sysfs.c create mode 100644 drivers/misc/trinity/trinity_trace.c create mode 100644 drivers/misc/trinity/trinity_trace.h create mode 100644 drivers/misc/trinity/trinity_vision2_drv.c create mode 100644 drivers/misc/trinity/trinity_vision2_profile.h create mode 100644 drivers/misc/trinity/trinity_vision2_regs.h create mode 100644 include/uapi/misc/trinity.h -- 2.25.1
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