From: Chris Wilson <chris@chris-wilson.co.uk>
Date: Fri, 27 Sep 2019 21:17:49 +0000 (+0100)
Subject: drm/i915/selftests: Provide a mock GPU reset routine
X-Git-Tag: for-linus-20191205~71^2~33^2~50
X-Git-Url: https://git.kernel.dk/?a=commitdiff_plain;h=4abc6e7c917b1929d8fad2c2364b270cae5ed4ca;p=linux-2.6-block.git

drm/i915/selftests: Provide a mock GPU reset routine

For those mock tests that may wish to pretend triggering a GPU reset and
processing the cleanup.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Andi Shyti <andi.shyti@intel.com>
Reviewed-by: Andi Shyti <andi.shyti@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190927211749.2181-3-chris@chris-wilson.co.uk
---

diff --git a/drivers/gpu/drm/i915/gt/intel_reset.c b/drivers/gpu/drm/i915/gt/intel_reset.c
index ea5cf3a28fbe..76938fa3a1b9 100644
--- a/drivers/gpu/drm/i915/gt/intel_reset.c
+++ b/drivers/gpu/drm/i915/gt/intel_reset.c
@@ -542,6 +542,13 @@ skip_reset:
 	return ret;
 }
 
+static int mock_reset(struct intel_gt *gt,
+		      intel_engine_mask_t mask,
+		      unsigned int retry)
+{
+	return 0;
+}
+
 typedef int (*reset_func)(struct intel_gt *,
 			  intel_engine_mask_t engine_mask,
 			  unsigned int retry);
@@ -550,7 +557,9 @@ static reset_func intel_get_gpu_reset(const struct intel_gt *gt)
 {
 	struct drm_i915_private *i915 = gt->i915;
 
-	if (INTEL_GEN(i915) >= 8)
+	if (is_mock_gt(gt))
+		return mock_reset;
+	else if (INTEL_GEN(i915) >= 8)
 		return gen8_reset_engines;
 	else if (INTEL_GEN(i915) >= 6)
 		return gen6_reset_engines;