drm/i915: Print caller when tainting for CI

We can add taint from multiple places, printing the caller allows us to
have a better overview of what exactly caused us to do the tainting.

v2: Tweak format and print the device (Chris)
v3: Move things around (Chris)
Suggested-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Signed-off-by: Michał Winiarski <michal.winiarski@intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Michal Wajdeczko <michal.wajdeczko@intel.com>
Cc: Petri Latvala <petri.latvala@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20200706144107.204821-2-michal@hardline.pl

drivers/gpu/drm/i915/gt/intel_reset.c

@@ -930,7 +930,7 @@ static bool __intel_gt_unset_wedged(struct intel_gt *gt)
 		 * Warn CI about the unrecoverable wedged condition.
 		 * Time for a reboot.
 		 */
-		add_taint_for_CI(TAINT_WARN);
+		add_taint_for_CI(gt->i915, TAINT_WARN);
 		return false;
 	}
 
@@ -1097,7 +1097,7 @@ void intel_gt_reset(struct intel_gt *gt,
 	 * rather than continue on into oblivion. For everyone else,
 	 * the system should still plod along, but they have been warned!
 	 */
-	add_taint_for_CI(TAINT_WARN);
+	add_taint_for_CI(gt->i915, TAINT_WARN);
 error:
 	__intel_gt_set_wedged(gt);
 	goto finish;
@@ -1362,7 +1362,7 @@ void intel_gt_set_wedged_on_init(struct intel_gt *gt)
 	set_bit(I915_WEDGED_ON_INIT, &gt->reset.flags);
 
 	/* Wedged on init is non-recoverable */
-	add_taint_for_CI(TAINT_WARN);
+	add_taint_for_CI(gt->i915, TAINT_WARN);
 }
 
 void intel_gt_set_wedged_on_fini(struct intel_gt *gt)

drivers/gpu/drm/i915/gt/selftest_rc6.c

@@ -233,7 +233,7 @@ int live_rc6_ctx_wa(void *arg)
 			    i915_reset_engine_count(error, engine)) {
 				pr_err("%s: GPU reset required\n",
 				       engine->name);
-				add_taint_for_CI(TAINT_WARN);
+				add_taint_for_CI(gt->i915, TAINT_WARN);
 				err = -EIO;
 				goto out;
 			}

drivers/gpu/drm/i915/i915_gem.h

@@ -72,7 +72,7 @@ struct drm_i915_private;
 	trace_printk(__VA_ARGS__);					\
 } while (0)
 #define GEM_TRACE_DUMP() \
-	do { ftrace_dump(DUMP_ALL); add_taint_for_CI(TAINT_WARN); } while (0)
+	do { ftrace_dump(DUMP_ALL); __add_taint_for_CI(TAINT_WARN); } while (0)
 #define GEM_TRACE_DUMP_ON(expr) \
 	do { if (expr) GEM_TRACE_DUMP(); } while (0)
 #else

drivers/gpu/drm/i915/i915_utils.c

@@ -49,6 +49,13 @@ __i915_printk(struct drm_i915_private *dev_priv, const char *level,
 	}
 }
 
+void add_taint_for_CI(struct drm_i915_private *i915, unsigned int taint)
+{
+	__i915_printk(i915, KERN_NOTICE, "CI tainted:%#x by %pS\n",
+		      taint, (void *)_RET_IP_);
+	__add_taint_for_CI(taint);
+}
+
 #if IS_ENABLED(CONFIG_DRM_I915_DEBUG)
 static unsigned int i915_probe_fail_count;
 

drivers/gpu/drm/i915/i915_utils.h

@@ -436,7 +436,8 @@ static inline const char *enableddisabled(bool v)
 	return v ? "enabled" : "disabled";
 }
 
-static inline void add_taint_for_CI(unsigned int taint)
+void add_taint_for_CI(struct drm_i915_private *i915, unsigned int taint);
+static inline void __add_taint_for_CI(unsigned int taint)
 {
 	/*
 	 * The system is "ok", just about surviving for the user, but

drivers/gpu/drm/i915/intel_uncore.c

@@ -142,7 +142,7 @@ fw_domain_wait_ack_clear(const struct intel_uncore_forcewake_domain *d)
 	if (wait_ack_clear(d, FORCEWAKE_KERNEL)) {
 		DRM_ERROR("%s: timed out waiting for forcewake ack to clear.\n",
 			  intel_uncore_forcewake_domain_to_str(d->id));
-		add_taint_for_CI(TAINT_WARN); /* CI now unreliable */
+		add_taint_for_CI(d->uncore->i915, TAINT_WARN); /* CI now unreliable */
 	}
 }
 
@@ -219,7 +219,7 @@ fw_domain_wait_ack_set(const struct intel_uncore_forcewake_domain *d)
 	if (wait_ack_set(d, FORCEWAKE_KERNEL)) {
 		DRM_ERROR("%s: timed out waiting for forcewake ack request.\n",
 			  intel_uncore_forcewake_domain_to_str(d->id));
-		add_taint_for_CI(TAINT_WARN); /* CI now unreliable */
+		add_taint_for_CI(d->uncore->i915, TAINT_WARN); /* CI now unreliable */
 	}
 }