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