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gpu: nvgpu: create device/context profiler dev nodes

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Create new dev nodes for device and context profilers. Example of dev
nodes on iGPU
/dev/nvhost-prof-dev-gpu - device scope profiler
/dev/nvhost-prof-ctx-gpu - context scope profiler

Add below APIs to open/close above dev nodes :
nvgpu_prof_dev_fops_open()
nvgpu_prof_ctx_fops_open()
nvgpu_prof_fops_release()

Add common API nvgpu_prof_fops_ioctl() to handle IOCTL call on these
dev nodes. Add IOCTL NVGPU_PROFILER_IOCTL_BIND_CONTEXT to bind the TSG
to profiler objects.

Add nvgpu_tsg_get_from_file() to retrieve TSG struct pointer from
file descriptor. Also store profiler object pointer into TSG struct.

Enable NVGPU_SUPPORT_PROFILER_V2_DEVICE capability on gv11b and tu104.
Note that this is not yet enabled for vGPU.
Keep NVGPU_SUPPORT_PROFILER_V2_CONTEXT capabiity disabled since this
will take longer to support.

Add new IOCTL NVGPU_PROFILER_IOCTL_UNBIND_CONTEXT so that userspace can
explicitly unbind the context and release the resources before closing
the profiler descriptor.

Add context_init flag to profiler object for book keeping.

Bug 2510974
Jira NVGPU-5360

Change-Id: Ie07e0cfd5a9da9d80008f79c955c7ef93b4bc60f
Signed-off-by: Deepak Nibade <dnibade@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2384354
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
This commit is contained in:
Deepak Nibade
2020-05-13 11:32:16 +05:30
committed by Alex Waterman
parent fb95b7efa7
commit 969b901999
16 changed files with 437 additions and 5 deletions
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1
drivers/gpu/nvgpu/os/linux/ioctl_ctrl.c
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@@ -411,6 +411,7 @@ gk20a_ctrl_ioctl_gpu_characteristics(
gpu.as_ioctl_nr_last = NVGPU_AS_IOCTL_LAST;
gpu.event_ioctl_nr_last = NVGPU_EVENT_IOCTL_LAST;
gpu.ctxsw_ioctl_nr_last = NVGPU_CTXSW_IOCTL_LAST;
gpu.prof_ioctl_nr_last = NVGPU_PROFILER_IOCTL_LAST;
gpu.gpu_va_bit_count = 40;
strlcpy(gpu.chipname, g->name, sizeof(gpu.chipname));