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gpu: nvgpu: Modify device node path for iGPU-PCIe

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Create device nodes for iGPU-PCIe at /dev/nvgpu/igpu-XXXX:XX:XX.X/
This helps to identify the GPU type and its location at PCIe bus.

Example dev node entry:
	/dev/nvgpu/igpu-0000:01:00.0/power

JIRA NVGPU-9451

Change-Id: If66714467a989370c85c1e81d6e6c0c02ce0e6f4
Signed-off-by: Ramalingam C <ramalingamc@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2847618
Reviewed-by: Martin Radev <mradev@nvidia.com>
Reviewed-by: Seema Khowala <seemaj@nvidia.com>
GVS: Gerrit_Virtual_Submit <buildbot_gerritrpt@nvidia.com>
This commit is contained in:
Ramalingam C
2023-01-23 00:04:55 +00:00
committed by mobile promotions
parent a765a76c81
commit 14cb86727c
1 changed files with 19 additions and 4 deletions
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23
drivers/gpu/nvgpu/os/linux/ioctl.c
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@@ -1,7 +1,7 @@
/*
* NVGPU IOCTLs
*
* Copyright (c) 2011-2022, NVIDIA CORPORATION. All rights reserved.
* Copyright (c) 2011-2023, NVIDIA CORPORATION. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
@@ -253,8 +253,18 @@ static char *nvgpu_pci_devnode_v2(struct device *dev, umode_t *mode)
static char *nvgpu_pci_devnode_v2(const struct device *dev, umode_t *mode)
#endif
{
return kasprintf(GFP_KERNEL, "nvgpu/dgpu-%s/%s", dev_name(dev->parent),
dev_name(dev));
return kasprintf(GFP_KERNEL, "nvgpu/dgpu-%s/%s",
dev_name(dev->parent), dev_name(dev));
}
#if (LINUX_VERSION_CODE < KERNEL_VERSION(6, 2, 0))
static char *nvgpu_pci_igpu_devnode_v2(struct device *dev, umode_t *mode)
#else
static char *nvgpu_pci_igpu_devnode_v2(const struct device *dev, umode_t *mode)
#endif
{
return kasprintf(GFP_KERNEL, "nvgpu/igpu-%s/%s",
dev_name(dev->parent), dev_name(dev));
}
#if (LINUX_VERSION_CODE < KERNEL_VERSION(6, 2, 0))
@@ -553,7 +563,12 @@ static int nvgpu_prepare_default_dev_node_class_list(struct gk20a *g,
if (class == NULL) {
return -ENOMEM;
}
class->class->devnode = nvgpu_pci_devnode_v2;
if (g->is_pci_igpu) {
class->class->devnode = nvgpu_pci_igpu_devnode_v2;
} else {
class->class->devnode = nvgpu_pci_devnode_v2;
}
count++;
} else {
if (power_node) {