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gpu: nvgpu: Add reboot handler

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Add a reboot handler to make sure that nvgpu does not try to busy
the GPU if the system is going down. If the system is going down
then any number of subsystems nvgpu depends on may already have
been deinitialized.

Bug 200333709
Bug 200454316

Change-Id: I2ceaf7ca4fb88643310874b5b26937ef44c6e3dd
Signed-off-by: Kary Jin <karyj@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1927018
(cherry picked from commit 9d2e50de42)
Reviewed-on: https://git-master.nvidia.com/r/1927030
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
This commit is contained in:
Kary Jin
2018-10-15 15:57:52 +08:00
committed by mobile promotions
parent 0188b93e30
commit 5b1b9eeab1
5 changed files with 37 additions and 6 deletions
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26
drivers/gpu/nvgpu/os/linux/module.c
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@@ -24,6 +24,8 @@
#include <linux/interrupt.h>
#include <linux/pm_runtime.h>
#include <linux/reset.h>
#include <linux/reboot.h>
#include <linux/notifier.h>
#include <linux/platform/tegra/common.h>
#include <linux/pci.h>
@@ -77,6 +79,17 @@
#define CREATE_TRACE_POINTS
#include <trace/events/gk20a.h>
static int nvgpu_kernel_shutdown_notification(struct notifier_block *nb,
unsigned long event, void *unused)
{
struct nvgpu_os_linux *l = container_of(nb, struct nvgpu_os_linux,
nvgpu_reboot_nb);
struct gk20a *g = &l->g;
__nvgpu_set_enabled(g, NVGPU_KERNEL_IS_DYING, true);
return NOTIFY_DONE;
}
struct device_node *nvgpu_get_node(struct gk20a *g)
{
struct device *dev = dev_from_gk20a(g);
@@ -111,7 +124,7 @@ int gk20a_busy(struct gk20a *g)
down_read(&l->busy_lock);
if (!gk20a_can_busy(g)) {
if (!nvgpu_can_busy(g)) {
ret = -ENODEV;
atomic_dec(&g->usage_count.atomic_var);
goto fail;
@@ -158,7 +171,7 @@ void gk20a_idle(struct gk20a *g)
dev = dev_from_gk20a(g);
if (!(dev && gk20a_can_busy(g)))
if (!(dev && nvgpu_can_busy(g)))
return;
if (pm_runtime_enabled(dev)) {
@@ -1370,6 +1383,12 @@ static int gk20a_probe(struct platform_device *dev)
goto return_err;
}
l->nvgpu_reboot_nb.notifier_call =
nvgpu_kernel_shutdown_notification;
err = register_reboot_notifier(&l->nvgpu_reboot_nb);
if (err)
goto return_err;
return 0;
return_err:
@@ -1443,12 +1462,15 @@ static int __exit gk20a_remove(struct platform_device *pdev)
int err;
struct device *dev = &pdev->dev;
struct gk20a *g = get_gk20a(dev);
struct nvgpu_os_linux *l = nvgpu_os_linux_from_gk20a(g);
if (gk20a_gpu_is_virtual(dev))
return vgpu_remove(pdev);
err = nvgpu_remove(dev, &nvgpu_class);
unregister_reboot_notifier(&l->nvgpu_reboot_nb);
set_gk20a(pdev, NULL);
gk20a_put(g);