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gpu: nvgpu: create symbolic link gpu.0 under /sys/devices/

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In linux kernel v4.14 and below gpu sysfs node is created under
/sys/devices. In linux kernel v5.x it is created under
/sys/devices/platform.

Create symbolic link gpu.0 under /sys/devices/ as various tests
and scripts expect it to be there.

Bug 200665782

Change-Id: I807ce72fad94438f927df25e829082e771b72543
Signed-off-by: Sagar Kamble <skamble@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2426544
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
This commit is contained in:
Sagar Kamble
2020-10-12 11:28:37 +05:30
committed by Alex Waterman
parent d003fa57df
commit 8cf5391330
1 changed files with 21 additions and 0 deletions
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21
drivers/gpu/nvgpu/os/linux/sysfs.c
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@@ -17,6 +17,7 @@
#include <linux/device.h> #include <linux/device.h>
#include <linux/pm_runtime.h> #include <linux/pm_runtime.h>
#include <linux/fb.h> #include <linux/fb.h>
#include <linux/version.h>
#include <nvgpu/kmem.h> #include <nvgpu/kmem.h>
#include <nvgpu/nvhost.h> #include <nvgpu/nvhost.h>
@@ -1109,6 +1110,13 @@ void nvgpu_remove_sysfs(struct device *dev)
struct device *parent = container_of((kobj->parent), struct device *parent = container_of((kobj->parent),
struct device, kobj); struct device, kobj);
sysfs_remove_link(&parent->kobj, "gpu.0"); sysfs_remove_link(&parent->kobj, "gpu.0");
#if LINUX_VERSION_CODE > KERNEL_VERSION(4, 14, 0)
kobj = &parent->kobj;
parent = container_of((kobj->parent),
struct device, kobj);
sysfs_remove_link(&parent->kobj, "gpu.0");
#endif
} }
} }
@@ -1161,6 +1169,19 @@ int nvgpu_create_sysfs(struct device *dev)
struct device, kobj); struct device, kobj);
error |= sysfs_create_link(&parent->kobj, error |= sysfs_create_link(&parent->kobj,
&dev->kobj, "gpu.0"); &dev->kobj, "gpu.0");
#if LINUX_VERSION_CODE > KERNEL_VERSION(4, 14, 0)
/*
* Create symbolic link under /sys/devices/ as various tests
* expect it to be there. Above sysfs_create_link creates
* it under /sys/devices/platform/ from kernels after v4.14.
*/
kobj = &parent->kobj;
parent = container_of((kobj->parent),
struct device, kobj);
error |= sysfs_create_link(&parent->kobj,
&dev->kobj, "gpu.0");
#endif
} }
if (error) if (error)