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gpu: nvgpu: skip physical instance dev nodes

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On Linux, nvrm_gpu can open channel/tsg/address space only using ctrl
node. This tricks nvrm_gpu into considering physical instance as
actual available fGPU if ctrl node is exposed for physical instance.

There is no current requirement to expose physical instance ctrl node.
It might be needed later for profiling use cases.

For now, skip dev node creation for physical instance.

Jira NVGPU-5648

Change-Id: I23398ba993f97e2d2f344876c0c6b0c82b336402
Signed-off-by: Deepak Nibade <dnibade@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2439880
Reviewed-by: automaticguardword <automaticguardword@nvidia.com>
Reviewed-by: Lakshmanan M <lm@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
GVS: Gerrit_Virtual_Submit
This commit is contained in:
Deepak Nibade
2020-11-02 10:54:42 +05:30
committed by Alex Waterman
parent dbad874d9e
commit 67a68771d4
1 changed files with 15 additions and 0 deletions
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15
drivers/gpu/nvgpu/os/linux/ioctl.c
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@@ -495,6 +495,17 @@ static bool check_valid_dev_node(struct gk20a *g, struct nvgpu_class *class,
return true;
}
static bool check_valid_class(struct gk20a *g, struct nvgpu_class *class)
{
if (nvgpu_is_enabled(g, NVGPU_SUPPORT_MIG)) {
if (class->instance_type == NVGPU_MIG_TYPE_PHYSICAL) {
return false;
}
}
return true;
}
int gk20a_user_init(struct device *dev)
{
int err;
@@ -526,6 +537,10 @@ int gk20a_user_init(struct device *dev)
l->cdev_region = devno;
nvgpu_list_for_each_entry(class, &l->class_list_head, nvgpu_class, list_entry) {
if (!check_valid_class(g, class)) {
continue;
}
for (cdev_index = 0; cdev_index < num_cdevs; cdev_index++) {
if (!check_valid_dev_node(g, class, &dev_node_list[cdev_index])) {
continue;