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gpu: nvgpu: add knob to control fecs_trace feature

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Currently, NVGPU_SUPPORT_FECS_CTXSW_TRACE enabled flag is set to true
when fecs_trace s/w setup is executed successfully. Sometimes,
fecs_trace is required to be disabled for debugging. This change will
help disable/enable fecs_trace feature by modifying one of the enabled
flags.
Enable NVGPU_SUPPORT_FECS_CTXSW_TRACE during chip specific hal init.
Control fec_trace init and ctxsw dev open depending on
NVGPU_SUPPORT_FECS_CTXSW_TRACE flag status.

JIRA NVGPU-5616

Change-Id: Id0754a5af7cd95a67a1f0ae5de36115d44e1111b
Signed-off-by: Vedashree Vidwans <vvidwans@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2357501
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
This commit is contained in:
Vedashree Vidwans
2020-06-24 15:09:03 -07:00
committed by Alex Waterman
parent 8fbc4e5b56
commit 9d723a5f1f
9 changed files with 26 additions and 6 deletions
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8
drivers/gpu/nvgpu/os/linux/fecs_trace_linux.c
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@@ -26,6 +26,7 @@
#include <nvgpu/barrier.h>
#include <nvgpu/gk20a.h>
#include <nvgpu/channel.h>
#include <nvgpu/enabled.h>
#include <nvgpu/gr/fecs_trace.h>
#include <nvgpu/string.h>
#include <nvgpu/nvgpu_init.h>
@@ -325,6 +326,11 @@ int gk20a_ctxsw_dev_open(struct inode *inode, struct file *filp)
if (!g)
return -ENODEV;
if (!nvgpu_is_enabled(g, NVGPU_SUPPORT_FECS_CTXSW_TRACE)) {
nvgpu_put(&l->g);
return -ENODEV;
}
nvgpu_log(g, gpu_dbg_fn|gpu_dbg_ctxsw, "g=%p", g);
if (!capable(CAP_SYS_ADMIN)) {
@@ -576,7 +582,7 @@ int gk20a_ctxsw_trace_init(struct gk20a *g)
nvgpu_log(g, gpu_dbg_fn|gpu_dbg_ctxsw, "g=%p trace=%p", g, trace);
/* if tracing is not supported, skip this */
if (!g->ops.gr.fecs_trace.init)
if (!nvgpu_is_enabled(g, NVGPU_SUPPORT_FECS_CTXSW_TRACE))
return 0;
if (likely(trace))