Am 28.08.19 um 22:00 schrieb Andrey Grodzovsky:
In case of RAS error allow user configure auto system
reboot through ras_ctrl.
This is also part of the temproray work around for the RAS
hang problem.
Signed-off-by: Andrey Grodzovsky <andrey.grodzovsky@xxxxxxx>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 18 ++++++++++++++++++
drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c | 10 +++++++++-
drivers/gpu/drm/amd/amdgpu/amdgpu_ras.h | 1 +
3 files changed, 28 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index 3ecee10..f1cff47 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -3805,6 +3805,24 @@ int amdgpu_device_gpu_recover(struct amdgpu_device *adev,
int i, r = 0;
bool in_ras_intr = amdgpu_ras_intr_triggered();
+ /*
+ * Flush RAM to disk so that after reboot
+ * the user can read log and see why the system rebooted.
+ *
+ * Using user mode app call instead of kernel APIs such as
+ * ksys_sync_helper for backward comparability with earlier
+ * kernels into which this is also intended.
+ */
+ if (in_ras_intr && amdgpu_ras_get_context(adev)->reboot) {
+ char *envp[] = { "HOME=/", NULL };
+ char *argv[] = { "/bin/sync", NULL };
+
+ DRM_WARN("Emergency reboot.");
+
+ call_usermodehelper(argv[0], argv, envp, UMH_WAIT_PROC);
+ emergency_restart();
+ }
+
need_full_reset = job_signaled = false;
INIT_LIST_HEAD(&device_list);
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
index 086e6df..423a1ba 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
@@ -30,6 +30,7 @@
#include "amdgpu_ras.h"
#include "amdgpu_atomfirmware.h"
#include "ivsrcid/nbio/irqsrcs_nbif_7_4.h"
+#include <linux/kmod.h>
const char *ras_error_string[] = {
"none",
@@ -154,6 +155,8 @@ static int amdgpu_ras_debugfs_ctrl_parse_data(struct file *f,
op = 1;
else if (sscanf(str, "inject %32s %8s", block_name, err) == 2)
op = 2;
+ else if (sscanf(str, "reboot %32s", block_name) == 1)
+ op = 3;
else if (str[0] && str[1] && str[2] && str[3])
/* ascii string, but commands are not matched. */
return -EINVAL;
This is actually becoming quite a mess. We should consider removing the
parsing in the long term and using separate debugfs files for each action.
Christian.
@@ -287,6 +290,9 @@ static ssize_t amdgpu_ras_debugfs_ctrl_write(struct file *f, const char __user *
/* data.inject.address is offset instead of absolute gpu address */
ret = amdgpu_ras_error_inject(adev, &data.inject);
break;
+ case 3:
+ amdgpu_ras_get_context(adev)->reboot = true;
+ break;
default:
ret = -EINVAL;
break;
@@ -1733,6 +1739,8 @@ int amdgpu_ras_fini(struct amdgpu_device *adev)
void amdgpu_ras_global_ras_isr(struct amdgpu_device *adev)
{
if (atomic_cmpxchg(&amdgpu_ras_in_intr, 0, 1) == 0) {
- DRM_WARN("RAS event of type ERREVENT_ATHUB_INTERRUPT detected! Stopping all GPU jobs.\n");
+ DRM_WARN("RAS event of type ERREVENT_ATHUB_INTERRUPT detected!\n");
+
+ amdgpu_ras_reset_gpu(adev, false);
}
}
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.h
index c0e22af..e3f0764 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.h
@@ -333,6 +333,7 @@ struct amdgpu_ras {
struct mutex recovery_lock;
uint32_t flags;
+ bool reboot;
};
struct ras_fs_data {
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