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gpu: nvgpu: add field in characteristics struct for max gpfifo entries

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Expose max gpfifo entries supported by nvgpu-rm. This limit will then be
propagated to application by nvrm_gpu.

Jira NVGPU-5846

Change-Id: Ibbbed9e1929c3bcc4eaaec9636d76e9e115e0c0c
Signed-off-by: shashank singh <shashsingh@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2482936
(cherry picked from commit b099a700aa055a5864ddb65cb546c9294c02b2b9)
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2497486
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
This commit is contained in:
shashank singh
2021-02-10 16:25:45 +05:30
committed by mobile promotions
parent cc34df76f9
commit 46cdc4d5ca
2 changed files with 6 additions and 1 deletions
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3
drivers/gpu/nvgpu/os/linux/ioctl_ctrl.c
View File

@@ -493,6 +493,9 @@ static long gk20a_ctrl_ioctl_gpu_characteristics(
gpu.gpu_instance_id = gpu_instance->gpu_instance_id;
gpu.gr_instance_id = gpu_instance->gr_syspipe.gr_syspipe_id;
gpu.max_gpfifo_entries = rounddown_pow_of_two(U32_MAX /
nvgpu_get_gpfifo_entry_size());
if (request->gpu_characteristics_buf_size > 0) {
size_t write_size = sizeof(gpu);

4
include/uapi/linux/nvgpu-ctrl.h
View File

@@ -318,7 +318,9 @@ struct nvgpu_gpu_characteristics {
__u32 gpu_instance_id;
__u32 gr_instance_id;
__u32 reserved4;
/** Max gpfifo entries allowed by nvgpu-rm. */
__u32 max_gpfifo_entries;
/* Notes:
- This struct can be safely appended with new fields. However, always