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gpu: nvgpu: Add characterstics field to expose max ctxsw ring buffer size

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NVGPU_CTXSW_IOCTL_RING_SETUP can be used to setup a custom ring buffer
and it accepts size via arguments. nvgpu driver will return an error
if size requested is greater than 128 * 4096 but this value is hardcoded
and not exposed anywhere.
Add characteristics field in nvgpu.h to expose this size so that corresponding
nvrm_gpu API can use it.

Bug 2169674

Change-Id: Icf9465d4eec6ba3a307ea9490bd5da563944e4f6
Signed-off-by: Anup Mahindre <amahindre@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1967596
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
This commit is contained in:
Anup Mahindre
2018-12-07 15:18:00 +05:30
committed by mobile promotions
parent 7e68e5c83d
commit 75ff0feeff
4 changed files with 7 additions and 0 deletions
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1
drivers/gpu/nvgpu/gk20a/gr_gk20a.h
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@@ -393,6 +393,7 @@ struct gr_gk20a {
struct gk20a_cs_snapshot *cs_data; struct gk20a_cs_snapshot *cs_data;
#endif #endif
u32 max_css_buffer_size; u32 max_css_buffer_size;
u32 max_ctxsw_ring_buffer_size;
}; };
void gk20a_fecs_dump_falcon_stats(struct gk20a *g); void gk20a_fecs_dump_falcon_stats(struct gk20a *g);

2
drivers/gpu/nvgpu/os/linux/ctxsw_trace.c
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@@ -580,6 +580,8 @@ int gk20a_ctxsw_trace_init(struct gk20a *g)
if (unlikely(err)) if (unlikely(err))
goto fail; goto fail;
g->gr.max_ctxsw_ring_buffer_size = GK20A_CTXSW_TRACE_MAX_VM_RING_SIZE;
return 0; return 0;
fail: fail:

1
drivers/gpu/nvgpu/os/linux/ioctl_ctrl.c
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@@ -326,6 +326,7 @@ gk20a_ctrl_ioctl_gpu_characteristics(
gpu.sm_arch_warp_count = g->params.sm_arch_warp_count; gpu.sm_arch_warp_count = g->params.sm_arch_warp_count;
gpu.max_css_buffer_size = g->gr.max_css_buffer_size; gpu.max_css_buffer_size = g->gr.max_css_buffer_size;
gpu.max_ctxsw_ring_buffer_size = g->gr.max_ctxsw_ring_buffer_size;
gpu.gpu_ioctl_nr_last = NVGPU_GPU_IOCTL_LAST; gpu.gpu_ioctl_nr_last = NVGPU_GPU_IOCTL_LAST;
gpu.tsg_ioctl_nr_last = NVGPU_TSG_IOCTL_LAST; gpu.tsg_ioctl_nr_last = NVGPU_TSG_IOCTL_LAST;

3
include/uapi/linux/nvgpu.h
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@@ -283,6 +283,9 @@ struct nvgpu_gpu_characteristics {
__s16 ctxsw_ioctl_nr_last; __s16 ctxsw_ioctl_nr_last;
__u8 reserved2[6]; __u8 reserved2[6];
__u32 max_ctxsw_ring_buffer_size;
__u32 reserved3;
/* Notes: /* Notes:
- This struct can be safely appended with new fields. However, always - This struct can be safely appended with new fields. However, always
keep the structure size multiple of 8 and make sure that the binary keep the structure size multiple of 8 and make sure that the binary