From 1c40d09c4c9c011c1318c328c0b4b6b17d1f537e Mon Sep 17 00:00:00 2001 From: Anton Vorontsov Date: Wed, 19 Aug 2015 14:27:51 -0700 Subject: gpu: nvgpu: Add support for FECS ctxsw tracing bug 1648908 This commit adds support for FECS ctxsw tracing. Code is compiled conditionnaly under CONFIG_GK20_CTXSW_TRACE. This feature requires an updated FECS ucode that writes one record to a ring buffer on each context switch. On RM/Kernel side, the GPU driver reads records from the master ring buffer and generates trace entries into a user-facing VM ring buffer. For each record in the master ring buffer, RM/Kernel has to retrieve the vmid+pid of the user process that submitted related work. Features currently implemented: - master ring buffer allocation - debugfs to dump master ring buffer - FECS record per context switch (with both current and new contexts) - dedicated device for ctxsw tracing (access to VM ring buffer) - SOF generation (and access to PTIMER) - VM ring buffer allocation, and reconfiguration - enable/disable tracing at user level - event-based trace filtering - context_ptr to vmid+pid mapping - read system call for ctxsw dev - mmap system call for ctxsw dev (direct access to VM ring buffer) - poll system call for ctxsw dev - save/restore register on ELPG/CG6 - separate user ring from FECS ring handling Features requiring ucode changes: - enable/disable tracing at FECS level - actual busy time on engine (bug 1642354) - master ring buffer threshold interrupt (P1) - API for GPU to CPU timestamp conversion (P1) - vmid/pid/uid based filtering (P1) Change-Id: I8e39c648221ee0fa09d5df8524b03dca83fe24f3 Signed-off-by: Thomas Fleury Reviewed-on: http://git-master/r/1022737 GVS: Gerrit_Virtual_Submit Reviewed-by: Terje Bergstrom --- drivers/gpu/nvgpu/gk20a/fecs_trace_gk20a.h | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) create mode 100644 drivers/gpu/nvgpu/gk20a/fecs_trace_gk20a.h (limited to 'drivers/gpu/nvgpu/gk20a/fecs_trace_gk20a.h') diff --git a/drivers/gpu/nvgpu/gk20a/fecs_trace_gk20a.h b/drivers/gpu/nvgpu/gk20a/fecs_trace_gk20a.h new file mode 100644 index 00000000..4979d6c6 --- /dev/null +++ b/drivers/gpu/nvgpu/gk20a/fecs_trace_gk20a.h @@ -0,0 +1,20 @@ +/* + * Copyright (c) 2016, NVIDIA CORPORATION. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + */ + +#ifndef __FECS_TRACE_GK20A_H +#define __FECS_TRACE_GK20A_H + +struct gpu_ops; +void gk20a_init_fecs_trace_ops(struct gpu_ops *ops); + +#endif /* __FECS_TRACE_GK20A_H */ -- cgit v1.2.2