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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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7
include/uapi/linux/nvgpu.h
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@@ -315,7 +315,8 @@ struct nvgpu_gpu_characteristics {
__u32 max_css_buffer_size;
__s16 ctxsw_ioctl_nr_last;
__u8 reserved2[6];
__s16 prof_ioctl_nr_last;
__u8 reserved2[4];
__u32 max_ctxsw_ring_buffer_size;
__u32 reserved3;
@@ -1624,10 +1625,12 @@ struct nvgpu_profiler_exec_reg_ops_args {
_IOWR(NVGPU_PROFILER_IOCTL_MAGIC, 8, struct nvgpu_profiler_pma_stream_update_get_put_args)
#define NVGPU_PROFILER_IOCTL_EXEC_REG_OPS \
_IOWR(NVGPU_PROFILER_IOCTL_MAGIC, 9, struct nvgpu_profiler_exec_reg_ops_args)
#define NVGPU_PROFILER_IOCTL_UNBIND_CONTEXT \
_IO(NVGPU_PROFILER_IOCTL_MAGIC, 10)
#define NVGPU_PROFILER_IOCTL_MAX_ARG_SIZE \
sizeof(struct nvgpu_profiler_alloc_pma_stream_args)
#define NVGPU_PROFILER_IOCTL_LAST \
_IOC_NR(NVGPU_PROFILER_IOCTL_EXEC_REG_OPS)
_IOC_NR(NVGPU_PROFILER_IOCTL_UNBIND_CONTEXT)
/*