Deepak Nibade a1bbcff476 gpu: nvgpu: enumerate dev nodes per GPU instance in MIG mode ...

In MIG mode, each of the dev nodes should be enumerated for each fGPU.
And for physical instance only the "ctrl" node should be enumerated.

Support this with below set of changes :

- Add struct nvgpu_mig_static_info that describes static GPU instance
  configuration. GPCs are enumerated only during poweron and grmgr unit
  will populate instance information based on number of GPCs.
  For linux, GPU poweron happens only with first gk20a_busy() call and
  instance information is not available during probe() time. Hence this
  static table is a temporary solution until proper solution is
  identified.

- Add nvgpu_default_mig_static_info for iGPU and
  nvgpu_default_pci_mig_static_info for dGPU that describes GPU instance
  partition.

- Add new function nvgpu_prepare_mig_dev_node_class_list() that parses
  the static table and creates one class per instance in MIG mode.
  Non-MIG mode classes are now enumerated in
  nvgpu_prepare_default_dev_node_class_list().

- Add new structure nvgpu_cdev_class_priv_data to store private data for
  each cdev. This will hold instance specific information and pointer to
  private data will be maintained in struct class and also passed as
  private data while creating device node with device_create()

- Add nvgpu_mig_phys_devnode() to set dev node path/names for fGPUs and
  add nvgpu_mig_fgpu_devnode() to set dev node path/names for physical
  instance in MIG mode.

- Add new field mig_physical_node to struct nvgpu_dev_node. This field
  is set if corresponding dev node should be created for physical
  instance in MIG mode. For now set it only for "ctrl" node.

Jira NVGPU-5648

Change-Id: Ic97874eece1fbe0083b3ac4c48e36e06004f1bc2
Signed-off-by: Deepak Nibade <dnibade@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2434586
Reviewed-by: automaticguardword <automaticguardword@nvidia.com>
Reviewed-by: Lakshmanan M <lm@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
GVS: Gerrit_Virtual_Submit
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

2020-12-15 14:13:28 -06:00

14 KiB

Raw Blame History

View Raw