dt be507aea50 gpu: nvgpu: MIG mode selection at runtime ...

This is adding code to select MIG mode and boot
the GPU with selected mig config.

For testing MIG, after system boots

1. write  mig_mode_config by
     echo  x > /sys/devices/gpu.0/mig_mode_config for igpu
     echo x > /sys/devices/./platform/14100000.pcie/pci0001:00/0001:00:00.0/0001:01:00.0/ for dgpu

2. Then run any nvgpu* tests or nvrm_gpu_info.
If the mig_mode need to be changed , note down the supported
configs by "cat mig_mode_config_list" and reboot the system

3. Follow steps 1 and 2.

example output:

"cat mig_mode_config" 2

"cat mig_mode_config_list"

+++++++++ Config list Start ++++++++++

 CONFIG_ID : 0 for CONFIG NAME : 2 GPU instances each with 4 GPCs

 CONFIG_ID : 1 for CONFIG NAME : 4 GPU instances each with 2 GPCs

 CONFIG_ID : 2 for CONFIG NAME : 7 GPU instances - 1 GPU instance with 2
GPCs + 6 GPU instances each with 1 GPC

 CONFIG_ID : 3 for CONFIG NAME : 5 GPU instances - 1 GPU instance with 4
GPCs + 4 GPU instances each with 1 GPC

 CONFIG_ID : 4 for CONFIG NAME : 4 GPU instances - 1 GPU instance with 2
GPCs + 2 GPU instances each with 1 GPC + 1 GPU instance with 4 GPCs

 CONFIG_ID : 5 for CONFIG NAME : 6 GPU instances - 2 GPU instances each
with 2 GPCs + 4 GPU instances each with 1 GPC

 CONFIG_ID : 6 for CONFIG NAME : 5 GPU instances -  1 GPU instance with
2 GPCs + 2 GPU instances each with 1 GPC + 2 GPU instances with 2 GPCs

 CONFIG_ID : 7 for CONFIG NAME : 5 GPU instances - 2 GPU instances each
with 2 GPCs + 1 GPC instance with 2 GPCs + 2 GPU instances with 1 GPC

 CONFIG_ID : 8 for CONFIG NAME : 5 GPU instances - 1 GPC instance with 2
GPCs + 2 GPU instances each with 1 GPC + 2 GPU instances each with 2
GPCs

 CONFIG_ID : 9 for CONFIG NAME : 1 GPU instance with 8 GPCs

++++++++++ Config list End +++++++++++

JIRA NVGPU-6633

Change-Id: I3e56f8c836e1ced8753a60f328da63916faa7696
Signed-off-by: dt <dt@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2522821
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>

2021-05-06 06:09:21 -07:00

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