[RFC 19/28] drm/i915: Store intel_gt backpointer in vm

[Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>]

From: Tvrtko Ursulin <tvrtko.ursulin@intel.com>

This will come useful in the following patch.

Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
---
 drivers/gpu/drm/i915/i915_gem_gtt.c | 16 ++++++++++------
 drivers/gpu/drm/i915/i915_gem_gtt.h |  1 +
 2 files changed, 11 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c
index 95af45156cc2..0bc75c963955 100644
--- a/drivers/gpu/drm/i915/i915_gem_gtt.c
+++ b/drivers/gpu/drm/i915/i915_gem_gtt.c
@@ -1587,9 +1587,11 @@ static int gen8_preallocate_top_level_pdp(struct i915_ppgtt *ppgtt)
 	return -ENOMEM;
 }
 
-static void ppgtt_init(struct drm_i915_private *i915,
-		       struct i915_ppgtt *ppgtt)
+static void ppgtt_init(struct i915_ppgtt *ppgtt, struct intel_gt *gt)
 {
+	struct drm_i915_private *i915 = gt->i915;
+
+	ppgtt->vm.gt = gt;
 	ppgtt->vm.i915 = i915;
 	ppgtt->vm.dma = &i915->drm.pdev->dev;
 	ppgtt->vm.total = BIT_ULL(INTEL_INFO(i915)->ppgtt_size);
@@ -1618,7 +1620,7 @@ static struct i915_ppgtt *gen8_ppgtt_create(struct drm_i915_private *i915)
 	if (!ppgtt)
 		return ERR_PTR(-ENOMEM);
 
-	ppgtt_init(i915, ppgtt);
+	ppgtt_init(ppgtt, &i915->gt);
 
 	/*
 	 * From bdw, there is hw support for read-only pages in the PPGTT.
@@ -2155,7 +2157,7 @@ static struct i915_ppgtt *gen6_ppgtt_create(struct drm_i915_private *i915)
 	if (!ppgtt)
 		return ERR_PTR(-ENOMEM);
 
-	ppgtt_init(i915, &ppgtt->base);
+	ppgtt_init(&ppgtt->base, &i915->gt);
 
 	ppgtt->base.vm.allocate_va_range = gen6_alloc_va_range;
 	ppgtt->base.vm.clear_range = gen6_ppgtt_clear_range;
@@ -3502,10 +3504,12 @@ static int i915_gmch_probe(struct i915_ggtt *ggtt)
 	return 0;
 }
 
-static int ggtt_probe_hw(struct i915_ggtt *ggtt, struct drm_i915_private *i915)
+static int ggtt_probe_hw(struct i915_ggtt *ggtt, struct intel_gt *gt)
 {
+	struct drm_i915_private *i915 = gt->i915;
 	int ret;
 
+	ggtt->vm.gt = gt;
 	ggtt->vm.i915 = i915;
 	ggtt->vm.dma = &i915->drm.pdev->dev;
 
@@ -3551,7 +3555,7 @@ int i915_ggtt_probe_hw(struct drm_i915_private *i915)
 {
 	int ret;
 
-	ret = ggtt_probe_hw(&i915->ggtt, i915);
+	ret = ggtt_probe_hw(&i915->ggtt, &i915->gt);
 	if (ret)
 		return ret;
 
diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.h b/drivers/gpu/drm/i915/i915_gem_gtt.h
index b541190db6e8..9a3d96370f07 100644
--- a/drivers/gpu/drm/i915/i915_gem_gtt.h
+++ b/drivers/gpu/drm/i915/i915_gem_gtt.h
@@ -297,6 +297,7 @@ struct i915_address_space {
 	struct kref ref;
 
 	struct drm_mm mm;
+	struct intel_gt *gt;
 	struct drm_i915_private *i915;
 	struct device *dma;
 	/* Every address space belongs to a struct file - except for the global
-- 
2.20.1

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