AMDGPURESET uevent added to notify userspace, collect dump_stack and trace
Signed-off-by: Somalapuram Amaranath <Amaranath.Somalapuram@xxxxxxx>
---
drivers/gpu/drm/amd/amdgpu/nv.c | 45 +++++++++++++++++++++++++++++++++
1 file changed, 45 insertions(+)
diff --git a/drivers/gpu/drm/amd/amdgpu/nv.c b/drivers/gpu/drm/amd/amdgpu/nv.c
index 2ec1ffb36b1f..b73147ae41fb 100644
--- a/drivers/gpu/drm/amd/amdgpu/nv.c
+++ b/drivers/gpu/drm/amd/amdgpu/nv.c
@@ -529,10 +529,55 @@ nv_asic_reset_method(struct amdgpu_device *adev)
}
}
+/**
+ * drm_sysfs_reset_event - generate a DRM uevent
+ * @dev: DRM device
+ *
+ * Send a uevent for the DRM device specified by @dev. Currently we only
+ * set AMDGPURESET=1 in the uevent environment, but this could be expanded to
+ * deal with other types of events.
+ *
+ * Any new uapi should be using the drm_sysfs_connector_status_event()
+ * for uevents on connector status change.
+ */
+void drm_sysfs_reset_event(struct drm_device *dev)
+{
+ char *event_string = "AMDGPURESET=1";
+ char *envp[2] = { event_string, NULL };
+
+ kobject_uevent_env(&dev->primary->kdev->kobj, KOBJ_CHANGE, envp);
+}
+
+void amdgpu_reset_dumps(struct amdgpu_device *adev)
+{
+ struct drm_device *ddev = adev_to_drm(adev);
+ int r = 0, i;
+
+ /* original raven doesn't have full asic reset */
+ if ((adev->apu_flags & AMD_APU_IS_RAVEN) &&
+ !(adev->apu_flags & AMD_APU_IS_RAVEN2))
+ return;
+ for (i = 0; i < adev->num_ip_blocks; i++) {
+ if (!adev->ip_blocks[i].status.valid)
+ continue;
+ if (!adev->ip_blocks[i].version->funcs->reset_reg_dumps)
+ continue;
+ r = adev->ip_blocks[i].version->funcs->reset_reg_dumps(adev);
+
+ if (r)
+ DRM_ERROR("reset_reg_dumps of IP block <%s> failed %d\n",
+ adev->ip_blocks[i].version->funcs->name, r);
+ }
+
+ drm_sysfs_reset_event(ddev);
+ dump_stack();
+}
+
static int nv_asic_reset(struct amdgpu_device *adev)
{
int ret = 0;
+ amdgpu_reset_dumps(adev);
switch (nv_asic_reset_method(adev)) {
case AMD_RESET_METHOD_PCI:
dev_info(adev->dev, "PCI reset\n");
--
2.25.1
