Commit bdce2bea authored by Chris Wilson's avatar Chris Wilson
Browse files

drm/i915/gem: Replace implicit dev_priv->uncore for stolen init 



Pass around the intended intel_uncore for mmio access during stolen
setup, and avoid relying on the implicit magic I915_READ() macros.

Signed-off-by: default avatarChris Wilson <chris@chris-wilson.co.uk>
Cc: Matthew Auld <matthew.auld@intel.com>
Reviewed-by: default avatarMatthew Auld <matthew.auld@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191111182143.23479-1-chris@chris-wilson.co.uk
parent 3c7a44bb

drivers/gpu/drm/i915/gem/i915_gem_stolen.c

+109 −98
Original line number Diff line number Diff line
@@ -26,48 +26,49 @@ 
 * for is a boon.

 */



int i915_gem_stolen_insert_node_in_range(struct drm_i915_private *dev_priv,

int i915_gem_stolen_insert_node_in_range(struct drm_i915_private *i915,

					 struct drm_mm_node *node, u64 size,

					 unsigned alignment, u64 start, u64 end)

{

	int ret;



	if (!drm_mm_initialized(&dev_priv->mm.stolen))

	if (!drm_mm_initialized(&i915->mm.stolen))

		return -ENODEV;



	/* WaSkipStolenMemoryFirstPage:bdw+ */

	if (INTEL_GEN(dev_priv) >= 8 && start < 4096)

	if (INTEL_GEN(i915) >= 8 && start < 4096)

		start = 4096;



	mutex_lock(&dev_priv->mm.stolen_lock);

	ret = drm_mm_insert_node_in_range(&dev_priv->mm.stolen, node,

	mutex_lock(&i915->mm.stolen_lock);

	ret = drm_mm_insert_node_in_range(&i915->mm.stolen, node,

					  size, alignment, 0,

					  start, end, DRM_MM_INSERT_BEST);

	mutex_unlock(&dev_priv->mm.stolen_lock);

	mutex_unlock(&i915->mm.stolen_lock);



	return ret;

}



int i915_gem_stolen_insert_node(struct drm_i915_private *dev_priv,

int i915_gem_stolen_insert_node(struct drm_i915_private *i915,

				struct drm_mm_node *node, u64 size,

				unsigned alignment)

{

	return i915_gem_stolen_insert_node_in_range(dev_priv, node, size,

	return i915_gem_stolen_insert_node_in_range(i915, node, size,

						    alignment, 0, U64_MAX);

}



void i915_gem_stolen_remove_node(struct drm_i915_private *dev_priv,

void i915_gem_stolen_remove_node(struct drm_i915_private *i915,

				 struct drm_mm_node *node)

{

	mutex_lock(&dev_priv->mm.stolen_lock);

	mutex_lock(&i915->mm.stolen_lock);

	drm_mm_remove_node(node);

	mutex_unlock(&dev_priv->mm.stolen_lock);

	mutex_unlock(&i915->mm.stolen_lock);

}



static int i915_adjust_stolen(struct drm_i915_private *dev_priv,

static int i915_adjust_stolen(struct drm_i915_private *i915,

			      struct resource *dsm)

{

	struct i915_ggtt *ggtt = &dev_priv->ggtt;

	struct i915_ggtt *ggtt = &i915->ggtt;

	struct intel_uncore *uncore = ggtt->vm.gt->uncore;

	struct resource *r;



	if (dsm->start == 0 || dsm->end <= dsm->start)
@@ -79,14 +80,14 @@ static int i915_adjust_stolen(struct drm_i915_private *dev_priv, 
	 */



	/* Make sure we don't clobber the GTT if it's within stolen memory */

	if (INTEL_GEN(dev_priv) <= 4 &&

	    !IS_G33(dev_priv) && !IS_PINEVIEW(dev_priv) && !IS_G4X(dev_priv)) {

	if (INTEL_GEN(i915) <= 4 &&

	    !IS_G33(i915) && !IS_PINEVIEW(i915) && !IS_G4X(i915)) {

		struct resource stolen[2] = {*dsm, *dsm};

		struct resource ggtt_res;

		resource_size_t ggtt_start;



		ggtt_start = I915_READ(PGTBL_CTL);

		if (IS_GEN(dev_priv, 4))

		ggtt_start = intel_uncore_read(uncore, PGTBL_CTL);

		if (IS_GEN(i915, 4))

			ggtt_start = (ggtt_start & PGTBL_ADDRESS_LO_MASK) |

				     (ggtt_start & PGTBL_ADDRESS_HI_MASK) << 28;

		else
@@ -120,7 +121,7 @@ static int i915_adjust_stolen(struct drm_i915_private *dev_priv, 
	 * kernel. So if the region is already marked as busy, something

	 * is seriously wrong.

	 */

	r = devm_request_mem_region(dev_priv->drm.dev, dsm->start,

	r = devm_request_mem_region(i915->drm.dev, dsm->start,

				    resource_size(dsm),

				    "Graphics Stolen Memory");

	if (r == NULL) {
@@ -133,14 +134,14 @@ static int i915_adjust_stolen(struct drm_i915_private *dev_priv, 
		 * reservation starting from 1 instead of 0.

		 * There's also BIOS with off-by-one on the other end.

		 */

		r = devm_request_mem_region(dev_priv->drm.dev, dsm->start + 1,

		r = devm_request_mem_region(i915->drm.dev, dsm->start + 1,

					    resource_size(dsm) - 2,

					    "Graphics Stolen Memory");

		/*

		 * GEN3 firmware likes to smash pci bridges into the stolen

		 * range. Apparently this works.

		 */

		if (r == NULL && !IS_GEN(dev_priv, 3)) {

		if (!r && !IS_GEN(i915, 3)) {

			DRM_ERROR("conflict detected with stolen region: %pR\n",

				  dsm);
@@ -151,25 +152,27 @@ static int i915_adjust_stolen(struct drm_i915_private *dev_priv, 
	return 0;

}



static void i915_gem_cleanup_stolen(struct drm_i915_private *dev_priv)

static void i915_gem_cleanup_stolen(struct drm_i915_private *i915)

{

	if (!drm_mm_initialized(&dev_priv->mm.stolen))

	if (!drm_mm_initialized(&i915->mm.stolen))

		return;



	drm_mm_takedown(&dev_priv->mm.stolen);

	drm_mm_takedown(&i915->mm.stolen);

}



static void g4x_get_stolen_reserved(struct drm_i915_private *dev_priv,

static void g4x_get_stolen_reserved(struct drm_i915_private *i915,

				    struct intel_uncore *uncore,

				    resource_size_t *base,

				    resource_size_t *size)

{

	u32 reg_val = I915_READ(IS_GM45(dev_priv) ?

	u32 reg_val = intel_uncore_read(uncore,

					IS_GM45(i915) ?

					CTG_STOLEN_RESERVED :

					ELK_STOLEN_RESERVED);

	resource_size_t stolen_top = dev_priv->dsm.end + 1;

	resource_size_t stolen_top = i915->dsm.end + 1;



	DRM_DEBUG_DRIVER("%s_STOLEN_RESERVED = %08x\n",

			 IS_GM45(dev_priv) ? "CTG" : "ELK", reg_val);

			 IS_GM45(i915) ? "CTG" : "ELK", reg_val);



	if ((reg_val & G4X_STOLEN_RESERVED_ENABLE) == 0)

		return;
@@ -178,7 +181,7 @@ static void g4x_get_stolen_reserved(struct drm_i915_private *dev_priv, 
	 * Whether ILK really reuses the ELK register for this is unclear.

	 * Let's see if we catch anyone with this supposedly enabled on ILK.

	 */

	WARN(IS_GEN(dev_priv, 5), "ILK stolen reserved found? 0x%08x\n",

	WARN(IS_GEN(i915, 5), "ILK stolen reserved found? 0x%08x\n",

	     reg_val);



	if (!(reg_val & G4X_STOLEN_RESERVED_ADDR2_MASK))
@@ -190,11 +193,12 @@ static void g4x_get_stolen_reserved(struct drm_i915_private *dev_priv, 
	*size = stolen_top - *base;

}



static void gen6_get_stolen_reserved(struct drm_i915_private *dev_priv,

static void gen6_get_stolen_reserved(struct drm_i915_private *i915,

				     struct intel_uncore *uncore,

				     resource_size_t *base,

				     resource_size_t *size)

{

	u32 reg_val = I915_READ(GEN6_STOLEN_RESERVED);

	u32 reg_val = intel_uncore_read(uncore, GEN6_STOLEN_RESERVED);



	DRM_DEBUG_DRIVER("GEN6_STOLEN_RESERVED = %08x\n", reg_val);
@@ -222,12 +226,13 @@ static void gen6_get_stolen_reserved(struct drm_i915_private *dev_priv, 
	}

}



static void vlv_get_stolen_reserved(struct drm_i915_private *dev_priv,

static void vlv_get_stolen_reserved(struct drm_i915_private *i915,

				    struct intel_uncore *uncore,

				    resource_size_t *base,

				    resource_size_t *size)

{

	u32 reg_val = I915_READ(GEN6_STOLEN_RESERVED);

	resource_size_t stolen_top = dev_priv->dsm.end + 1;

	u32 reg_val = intel_uncore_read(uncore, GEN6_STOLEN_RESERVED);

	resource_size_t stolen_top = i915->dsm.end + 1;



	DRM_DEBUG_DRIVER("GEN6_STOLEN_RESERVED = %08x\n", reg_val);
@@ -250,11 +255,12 @@ static void vlv_get_stolen_reserved(struct drm_i915_private *dev_priv, 
	*base = stolen_top - *size;

}



static void gen7_get_stolen_reserved(struct drm_i915_private *dev_priv,

static void gen7_get_stolen_reserved(struct drm_i915_private *i915,

				     struct intel_uncore *uncore,

				     resource_size_t *base,

				     resource_size_t *size)

{

	u32 reg_val = I915_READ(GEN6_STOLEN_RESERVED);

	u32 reg_val = intel_uncore_read(uncore, GEN6_STOLEN_RESERVED);



	DRM_DEBUG_DRIVER("GEN6_STOLEN_RESERVED = %08x\n", reg_val);
@@ -276,11 +282,12 @@ static void gen7_get_stolen_reserved(struct drm_i915_private *dev_priv, 
	}

}



static void chv_get_stolen_reserved(struct drm_i915_private *dev_priv,

static void chv_get_stolen_reserved(struct drm_i915_private *i915,

				    struct intel_uncore *uncore,

				    resource_size_t *base,

				    resource_size_t *size)

{

	u32 reg_val = I915_READ(GEN6_STOLEN_RESERVED);

	u32 reg_val = intel_uncore_read(uncore, GEN6_STOLEN_RESERVED);



	DRM_DEBUG_DRIVER("GEN6_STOLEN_RESERVED = %08x\n", reg_val);
@@ -308,12 +315,13 @@ static void chv_get_stolen_reserved(struct drm_i915_private *dev_priv, 
	}

}



static void bdw_get_stolen_reserved(struct drm_i915_private *dev_priv,

static void bdw_get_stolen_reserved(struct drm_i915_private *i915,

				    struct intel_uncore *uncore,

				    resource_size_t *base,

				    resource_size_t *size)

{

	u32 reg_val = I915_READ(GEN6_STOLEN_RESERVED);

	resource_size_t stolen_top = dev_priv->dsm.end + 1;

	u32 reg_val = intel_uncore_read(uncore, GEN6_STOLEN_RESERVED);

	resource_size_t stolen_top = i915->dsm.end + 1;



	DRM_DEBUG_DRIVER("GEN6_STOLEN_RESERVED = %08x\n", reg_val);
@@ -328,10 +336,11 @@ static void bdw_get_stolen_reserved(struct drm_i915_private *dev_priv, 
}



static void icl_get_stolen_reserved(struct drm_i915_private *i915,

				    struct intel_uncore *uncore,

				    resource_size_t *base,

				    resource_size_t *size)

{

	u64 reg_val = intel_uncore_read64(&i915->uncore, GEN6_STOLEN_RESERVED);

	u64 reg_val = intel_uncore_read64(uncore, GEN6_STOLEN_RESERVED);



	DRM_DEBUG_DRIVER("GEN6_STOLEN_RESERVED = 0x%016llx\n", reg_val);
@@ -356,22 +365,23 @@ static void icl_get_stolen_reserved(struct drm_i915_private *i915, 
	}

}



static int i915_gem_init_stolen(struct drm_i915_private *dev_priv)

static int i915_gem_init_stolen(struct drm_i915_private *i915)

{

	struct intel_uncore *uncore = &i915->uncore;

	resource_size_t reserved_base, stolen_top;

	resource_size_t reserved_total, reserved_size;



	mutex_init(&dev_priv->mm.stolen_lock);

	mutex_init(&i915->mm.stolen_lock);



	if (intel_vgpu_active(dev_priv)) {

		dev_notice(dev_priv->drm.dev,

	if (intel_vgpu_active(i915)) {

		dev_notice(i915->drm.dev,

			   "%s, disabling use of stolen memory\n",

			   "iGVT-g active");

		return 0;

	}



	if (intel_vtd_active() && INTEL_GEN(dev_priv) < 8) {

		dev_notice(dev_priv->drm.dev,

	if (intel_vtd_active() && INTEL_GEN(i915) < 8) {

		dev_notice(i915->drm.dev,

			   "%s, disabling use of stolen memory\n",

			   "DMAR active");

		return 0;
@@ -380,58 +390,59 @@ static int i915_gem_init_stolen(struct drm_i915_private *dev_priv) 
	if (resource_size(&intel_graphics_stolen_res) == 0)

		return 0;



	dev_priv->dsm = intel_graphics_stolen_res;

	i915->dsm = intel_graphics_stolen_res;



	if (i915_adjust_stolen(dev_priv, &dev_priv->dsm))

	if (i915_adjust_stolen(i915, &i915->dsm))

		return 0;



	GEM_BUG_ON(dev_priv->dsm.start == 0);

	GEM_BUG_ON(dev_priv->dsm.end <= dev_priv->dsm.start);

	GEM_BUG_ON(i915->dsm.start == 0);

	GEM_BUG_ON(i915->dsm.end <= i915->dsm.start);



	stolen_top = dev_priv->dsm.end + 1;

	stolen_top = i915->dsm.end + 1;

	reserved_base = stolen_top;

	reserved_size = 0;



	switch (INTEL_GEN(dev_priv)) {

	switch (INTEL_GEN(i915)) {

	case 2:

	case 3:

		break;

	case 4:

		if (!IS_G4X(dev_priv))

		if (!IS_G4X(i915))

			break;

		/* fall through */

	case 5:

		g4x_get_stolen_reserved(dev_priv,

		g4x_get_stolen_reserved(i915, uncore,

					&reserved_base, &reserved_size);

		break;

	case 6:

		gen6_get_stolen_reserved(dev_priv,

		gen6_get_stolen_reserved(i915, uncore,

					 &reserved_base, &reserved_size);

		break;

	case 7:

		if (IS_VALLEYVIEW(dev_priv))

			vlv_get_stolen_reserved(dev_priv,

		if (IS_VALLEYVIEW(i915))

			vlv_get_stolen_reserved(i915, uncore,

						&reserved_base, &reserved_size);

		else

			gen7_get_stolen_reserved(dev_priv,

			gen7_get_stolen_reserved(i915, uncore,

						 &reserved_base, &reserved_size);

		break;

	case 8:

	case 9:

	case 10:

		if (IS_LP(dev_priv))

			chv_get_stolen_reserved(dev_priv,

		if (IS_LP(i915))

			chv_get_stolen_reserved(i915, uncore,

						&reserved_base, &reserved_size);

		else

			bdw_get_stolen_reserved(dev_priv,

			bdw_get_stolen_reserved(i915, uncore,

						&reserved_base, &reserved_size);

		break;

	default:

		MISSING_CASE(INTEL_GEN(dev_priv));

		MISSING_CASE(INTEL_GEN(i915));

		/* fall-through */

	case 11:

	case 12:

		icl_get_stolen_reserved(dev_priv, &reserved_base,

		icl_get_stolen_reserved(i915, uncore,

					&reserved_base,

					&reserved_size);

		break;

	}
@@ -448,12 +459,12 @@ static int i915_gem_init_stolen(struct drm_i915_private *dev_priv) 
		reserved_size = 0;

	}



	dev_priv->dsm_reserved =

	i915->dsm_reserved =

		(struct resource)DEFINE_RES_MEM(reserved_base, reserved_size);



	if (!resource_contains(&dev_priv->dsm, &dev_priv->dsm_reserved)) {

	if (!resource_contains(&i915->dsm, &i915->dsm_reserved)) {

		DRM_ERROR("Stolen reserved area %pR outside stolen memory %pR\n",

			  &dev_priv->dsm_reserved, &dev_priv->dsm);

			  &i915->dsm_reserved, &i915->dsm);

		return 0;

	}
@@ -462,14 +473,14 @@ static int i915_gem_init_stolen(struct drm_i915_private *dev_priv) 
	reserved_total = stolen_top - reserved_base;



	DRM_DEBUG_DRIVER("Memory reserved for graphics device: %lluK, usable: %lluK\n",

			 (u64)resource_size(&dev_priv->dsm) >> 10,

			 ((u64)resource_size(&dev_priv->dsm) - reserved_total) >> 10);

			 (u64)resource_size(&i915->dsm) >> 10,

			 ((u64)resource_size(&i915->dsm) - reserved_total) >> 10);



	dev_priv->stolen_usable_size =

		resource_size(&dev_priv->dsm) - reserved_total;

	i915->stolen_usable_size =

		resource_size(&i915->dsm) - reserved_total;



	/* Basic memrange allocator for stolen space. */

	drm_mm_init(&dev_priv->mm.stolen, 0, dev_priv->stolen_usable_size);

	drm_mm_init(&i915->mm.stolen, 0, i915->stolen_usable_size);



	return 0;

}
@@ -478,11 +489,11 @@ static struct sg_table * 
i915_pages_create_for_stolen(struct drm_device *dev,

			     resource_size_t offset, resource_size_t size)

{

	struct drm_i915_private *dev_priv = to_i915(dev);

	struct drm_i915_private *i915 = to_i915(dev);

	struct sg_table *st;

	struct scatterlist *sg;



	GEM_BUG_ON(range_overflows(offset, size, resource_size(&dev_priv->dsm)));

	GEM_BUG_ON(range_overflows(offset, size, resource_size(&i915->dsm)));



	/* We hide that we have no struct page backing our stolen object

	 * by wrapping the contiguous physical allocation with a fake
@@ -502,7 +513,7 @@ i915_pages_create_for_stolen(struct drm_device *dev, 
	sg->offset = 0;

	sg->length = size;



	sg_dma_address(sg) = (dma_addr_t)dev_priv->dsm.start + offset;

	sg_dma_address(sg) = (dma_addr_t)i915->dsm.start + offset;

	sg_dma_len(sg) = size;



	return st;
@@ -533,12 +544,12 @@ static void i915_gem_object_put_pages_stolen(struct drm_i915_gem_object *obj, 
static void

i915_gem_object_release_stolen(struct drm_i915_gem_object *obj)

{

	struct drm_i915_private *dev_priv = to_i915(obj->base.dev);

	struct drm_i915_private *i915 = to_i915(obj->base.dev);

	struct drm_mm_node *stolen = fetch_and_zero(&obj->stolen);



	GEM_BUG_ON(!stolen);



	i915_gem_stolen_remove_node(dev_priv, stolen);

	i915_gem_stolen_remove_node(i915, stolen);

	kfree(stolen);



	if (obj->mm.region)
@@ -552,7 +563,7 @@ static const struct drm_i915_gem_object_ops i915_gem_object_stolen_ops = { 
};



static struct drm_i915_gem_object *

__i915_gem_object_create_stolen(struct drm_i915_private *dev_priv,

__i915_gem_object_create_stolen(struct drm_i915_private *i915,

				struct drm_mm_node *stolen,

				struct intel_memory_region *mem)

{
@@ -565,12 +576,12 @@ __i915_gem_object_create_stolen(struct drm_i915_private *dev_priv, 
	if (!obj)

		goto err;



	drm_gem_private_object_init(&dev_priv->drm, &obj->base, stolen->size);

	drm_gem_private_object_init(&i915->drm, &obj->base, stolen->size);

	i915_gem_object_init(obj, &i915_gem_object_stolen_ops, &lock_class);



	obj->stolen = stolen;

	obj->read_domains = I915_GEM_DOMAIN_CPU | I915_GEM_DOMAIN_GTT;

	cache_level = HAS_LLC(dev_priv) ? I915_CACHE_LLC : I915_CACHE_NONE;

	cache_level = HAS_LLC(i915) ? I915_CACHE_LLC : I915_CACHE_NONE;

	i915_gem_object_set_cache_coherency(obj, cache_level);



	err = i915_gem_object_pin_pages(obj);
@@ -593,12 +604,12 @@ _i915_gem_object_create_stolen(struct intel_memory_region *mem, 
			       resource_size_t size,

			       unsigned int flags)

{

	struct drm_i915_private *dev_priv = mem->i915;

	struct drm_i915_private *i915 = mem->i915;

	struct drm_i915_gem_object *obj;

	struct drm_mm_node *stolen;

	int ret;



	if (!drm_mm_initialized(&dev_priv->mm.stolen))

	if (!drm_mm_initialized(&i915->mm.stolen))

		return ERR_PTR(-ENODEV);



	if (size == 0)
@@ -608,30 +619,30 @@ _i915_gem_object_create_stolen(struct intel_memory_region *mem, 
	if (!stolen)

		return ERR_PTR(-ENOMEM);



	ret = i915_gem_stolen_insert_node(dev_priv, stolen, size, 4096);

	ret = i915_gem_stolen_insert_node(i915, stolen, size, 4096);

	if (ret) {

		obj = ERR_PTR(ret);

		goto err_free;

	}



	obj = __i915_gem_object_create_stolen(dev_priv, stolen, mem);

	obj = __i915_gem_object_create_stolen(i915, stolen, mem);

	if (IS_ERR(obj))

		goto err_remove;



	return obj;



err_remove:

	i915_gem_stolen_remove_node(dev_priv, stolen);

	i915_gem_stolen_remove_node(i915, stolen);

err_free:

	kfree(stolen);

	return obj;

}



struct drm_i915_gem_object *

i915_gem_object_create_stolen(struct drm_i915_private *dev_priv,

i915_gem_object_create_stolen(struct drm_i915_private *i915,

			      resource_size_t size)

{

	return i915_gem_object_create_region(dev_priv->mm.regions[INTEL_REGION_STOLEN],

	return i915_gem_object_create_region(i915->mm.regions[INTEL_REGION_STOLEN],

					     size, I915_BO_ALLOC_CONTIGUOUS);

}
@@ -665,18 +676,18 @@ struct intel_memory_region *i915_gem_stolen_setup(struct drm_i915_private *i915) 
}



struct drm_i915_gem_object *

i915_gem_object_create_stolen_for_preallocated(struct drm_i915_private *dev_priv,

i915_gem_object_create_stolen_for_preallocated(struct drm_i915_private *i915,

					       resource_size_t stolen_offset,

					       resource_size_t gtt_offset,

					       resource_size_t size)

{

	struct i915_ggtt *ggtt = &dev_priv->ggtt;

	struct i915_ggtt *ggtt = &i915->ggtt;

	struct drm_i915_gem_object *obj;

	struct drm_mm_node *stolen;

	struct i915_vma *vma;

	int ret;



	if (!drm_mm_initialized(&dev_priv->mm.stolen))

	if (!drm_mm_initialized(&i915->mm.stolen))

		return ERR_PTR(-ENODEV);



	DRM_DEBUG_DRIVER("creating preallocated stolen object: stolen_offset=%pa, gtt_offset=%pa, size=%pa\n",
@@ -694,19 +705,19 @@ i915_gem_object_create_stolen_for_preallocated(struct drm_i915_private *dev_priv 


	stolen->start = stolen_offset;

	stolen->size = size;

	mutex_lock(&dev_priv->mm.stolen_lock);

	ret = drm_mm_reserve_node(&dev_priv->mm.stolen, stolen);

	mutex_unlock(&dev_priv->mm.stolen_lock);

	mutex_lock(&i915->mm.stolen_lock);

	ret = drm_mm_reserve_node(&i915->mm.stolen, stolen);

	mutex_unlock(&i915->mm.stolen_lock);

	if (ret) {

		DRM_DEBUG_DRIVER("failed to allocate stolen space\n");

		kfree(stolen);

		return ERR_PTR(ret);

	}



	obj = __i915_gem_object_create_stolen(dev_priv, stolen, NULL);

	obj = __i915_gem_object_create_stolen(i915, stolen, NULL);

	if (IS_ERR(obj)) {

		DRM_DEBUG_DRIVER("failed to allocate stolen object\n");

		i915_gem_stolen_remove_node(dev_priv, stolen);

		i915_gem_stolen_remove_node(i915, stolen);

		kfree(stolen);

		return obj;

	}

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