drm/i915/tdr: Prepare error handler to accept mask of hung engines

In preparation for engine reset, the wedged argument of i915_handle_error()
is extended to reflect as a mask of engines that are hung. This is further
passed down to error state capture functions which are also updated.

Engine reset recovery mechanism uses this mask and schedules recovery work
for those particular engines.

Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuoppala@intel.com>
Signed-off-by: Tomas Elf <tomas.elf@intel.com>
Signed-off-by: Arun Siluvery <arun.siluvery@linux.intel.com>
Reviewed-by: Mika Kuoppala <mika.kuoppala@intel.com>
Signed-off-by: Mika Kuoppala <mika.kuoppala@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1458331676-567-3-git-send-email-arun.siluvery@linux.intel.com
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 56eb5f0..9d29ab0 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -2757,7 +2757,7 @@
 /* i915_irq.c */
 void i915_queue_hangcheck(struct drm_device *dev);
 __printf(3, 4)
-void i915_handle_error(struct drm_device *dev, bool wedged,
+void i915_handle_error(struct drm_device *dev, u32 engine_mask,
 		       const char *fmt, ...);
 
 extern void intel_irq_init(struct drm_i915_private *dev_priv);
@@ -3343,7 +3343,7 @@
 {
 	kfree(eb->buf);
 }
-void i915_capture_error_state(struct drm_device *dev, bool wedge,
+void i915_capture_error_state(struct drm_device *dev, u32 engine_mask,
 			      const char *error_msg);
 void i915_error_state_get(struct drm_device *dev,
 			  struct i915_error_state_file_priv *error_priv);