[PATCH v2 1/8] drm/i915/ttm: dont trample cache_level overrides during ttm move

[PATCH v2 1/8] drm/i915/ttm: dont trample cache_level overrides during ttm move

[Robert Beckett]

Various places within the driver override the default chosen cache_level.
Before ttm, these overrides were permanent until explicitly changed again
or for the lifetime of the buffer.

TTM movement code came along and decided that it could make that
decision at that time, which is usually well after object creation, so
overrode the cache_level decision and reverted it back to its default
decision.

Add logic to indicate whether the caching mode has been set by anything
other than the move logic. If so, assume that the code that overrode the
defaults knows best and keep it.

Signed-off-by: Robert Beckett <bob.beckett@collabora.com>
---
 drivers/gpu/drm/i915/gem/i915_gem_object.c       | 1 +
 drivers/gpu/drm/i915/gem/i915_gem_object_types.h | 1 +
 drivers/gpu/drm/i915/gem/i915_gem_ttm.c          | 1 +
 drivers/gpu/drm/i915/gem/i915_gem_ttm_move.c     | 9 ++++++---
 4 files changed, 9 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/i915/gem/i915_gem_object.c b/drivers/gpu/drm/i915/gem/i915_gem_object.c
index 06b1b188ce5a..519887769c08 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_object.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_object.c
@@ -125,6 +125,7 @@ void i915_gem_object_set_cache_coherency(struct drm_i915_gem_object *obj,
 	struct drm_i915_private *i915 = to_i915(obj->base.dev);
 
 	obj->cache_level = cache_level;
+	obj->ttm.cache_level_override = true;
 
 	if (cache_level != I915_CACHE_NONE)
 		obj->cache_coherent = (I915_BO_CACHE_COHERENT_FOR_READ |
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_object_types.h b/drivers/gpu/drm/i915/gem/i915_gem_object_types.h
index 2c88bdb8ff7c..6632ed52e919 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_object_types.h
+++ b/drivers/gpu/drm/i915/gem/i915_gem_object_types.h
@@ -605,6 +605,7 @@ struct drm_i915_gem_object {
 		struct i915_gem_object_page_iter get_io_page;
 		struct drm_i915_gem_object *backup;
 		bool created:1;
+		bool cache_level_override:1;
 	} ttm;
 
 	/*
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_ttm.c b/drivers/gpu/drm/i915/gem/i915_gem_ttm.c
index 4c25d9b2f138..27d59639177f 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_ttm.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_ttm.c
@@ -1241,6 +1241,7 @@ int __i915_gem_ttm_object_init(struct intel_memory_region *mem,
 	i915_gem_object_init_memory_region(obj, mem);
 	i915_ttm_adjust_domains_after_move(obj);
 	i915_ttm_adjust_gem_after_move(obj);
+	obj->ttm.cache_level_override = false;
 	i915_gem_object_unlock(obj);
 
 	return 0;
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_ttm_move.c b/drivers/gpu/drm/i915/gem/i915_gem_ttm_move.c
index a10716f4e717..4c1de0b4a10f 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_ttm_move.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_ttm_move.c
@@ -123,9 +123,12 @@ void i915_ttm_adjust_gem_after_move(struct drm_i915_gem_object *obj)
 	obj->mem_flags |= i915_ttm_cpu_maps_iomem(bo->resource) ? I915_BO_FLAG_IOMEM :
 		I915_BO_FLAG_STRUCT_PAGE;
 
-	cache_level = i915_ttm_cache_level(to_i915(bo->base.dev), bo->resource,
-					   bo->ttm);
-	i915_gem_object_set_cache_coherency(obj, cache_level);
+	if (!obj->ttm.cache_level_override) {
+		cache_level = i915_ttm_cache_level(to_i915(bo->base.dev),
+						   bo->resource, bo->ttm);
+		i915_gem_object_set_cache_coherency(obj, cache_level);
+		obj->ttm.cache_level_override = false;
+	}
 }
 
 /**
-- 
2.25.1

[PATCH v2 2/8] drm/i915: add gen6 ppgtt dummy creation function

[Robert Beckett]

Internal gem objects will soon just be volatile system memory region
objects.
To enable this, create a separate dummy object creation function
for gen6 ppgtt. The object only exists as a fake object pointing to ggtt
and gains no benefit in going via the internal backend.
Instead, create a dummy gem object and avoid having to maintain a custom
ops api in the internal backend, which makes later refactoring easier.

Signed-off-by: Robert Beckett <bob.beckett@collabora.com>
---
 drivers/gpu/drm/i915/gt/gen6_ppgtt.c | 43 ++++++++++++++++++++++++++--
 1 file changed, 40 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/i915/gt/gen6_ppgtt.c b/drivers/gpu/drm/i915/gt/gen6_ppgtt.c
index 1bb766c79dcb..f3b660cfeb7f 100644
--- a/drivers/gpu/drm/i915/gt/gen6_ppgtt.c
+++ b/drivers/gpu/drm/i915/gt/gen6_ppgtt.c
@@ -372,6 +372,45 @@ static const struct drm_i915_gem_object_ops pd_dummy_obj_ops = {
 	.put_pages = pd_dummy_obj_put_pages,
 };
 
+static struct drm_i915_gem_object *
+i915_gem_object_create_dummy(struct drm_i915_private *i915, phys_addr_t size)
+{
+	static struct lock_class_key lock_class;
+	struct drm_i915_gem_object *obj;
+	unsigned int cache_level;
+
+	GEM_BUG_ON(!size);
+	GEM_BUG_ON(!IS_ALIGNED(size, PAGE_SIZE));
+
+	if (overflows_type(size, obj->base.size))
+		return ERR_PTR(-E2BIG);
+
+	obj = i915_gem_object_alloc();
+	if (!obj)
+		return ERR_PTR(-ENOMEM);
+
+	drm_gem_private_object_init(&i915->drm, &obj->base, size);
+	i915_gem_object_init(obj, &pd_dummy_obj_ops, &lock_class, 0);
+	obj->mem_flags |= I915_BO_FLAG_STRUCT_PAGE;
+
+	/*
+	 * Mark the object as volatile, such that the pages are marked as
+	 * dontneed whilst they are still pinned. As soon as they are unpinned
+	 * they are allowed to be reaped by the shrinker, and the caller is
+	 * expected to repopulate - the contents of this object are only valid
+	 * whilst active and pinned.
+	 */
+	i915_gem_object_set_volatile(obj);
+
+	obj->read_domains = I915_GEM_DOMAIN_CPU;
+	obj->write_domain = I915_GEM_DOMAIN_CPU;
+
+	cache_level = HAS_LLC(i915) ? I915_CACHE_LLC : I915_CACHE_NONE;
+	i915_gem_object_set_cache_coherency(obj, cache_level);
+
+	return obj;
+}
+
 static struct i915_page_directory *
 gen6_alloc_top_pd(struct gen6_ppgtt *ppgtt)
 {
@@ -383,9 +422,7 @@ gen6_alloc_top_pd(struct gen6_ppgtt *ppgtt)
 	if (unlikely(!pd))
 		return ERR_PTR(-ENOMEM);
 
-	pd->pt.base = __i915_gem_object_create_internal(ppgtt->base.vm.gt->i915,
-							&pd_dummy_obj_ops,
-							I915_PDES * SZ_4K);
+	pd->pt.base = i915_gem_object_create_dummy(ppgtt->base.vm.gt->i915, I915_PDES * SZ_4K);
 	if (IS_ERR(pd->pt.base)) {
 		err = PTR_ERR(pd->pt.base);
 		pd->pt.base = NULL;
-- 
2.25.1

[PATCH v2 3/8] drm/i915: setup ggtt scratch page after memory regions

[Robert Beckett]

Reorder scratch page allocation so that memory regions are available
to allocate the buffers

Signed-off-by: Robert Beckett <bob.beckett@collabora.com>
Reviewed-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
---
 drivers/gpu/drm/i915/gt/intel_gt_gmch.c | 20 ++++++++++++++++++--
 drivers/gpu/drm/i915/gt/intel_gt_gmch.h |  6 ++++++
 drivers/gpu/drm/i915/i915_driver.c      | 16 ++++++++++------
 3 files changed, 34 insertions(+), 8 deletions(-)

diff --git a/drivers/gpu/drm/i915/gt/intel_gt_gmch.c b/drivers/gpu/drm/i915/gt/intel_gt_gmch.c
index 18e488672d1b..5411df1734ac 100644
--- a/drivers/gpu/drm/i915/gt/intel_gt_gmch.c
+++ b/drivers/gpu/drm/i915/gt/intel_gt_gmch.c
@@ -440,8 +440,6 @@ static int ggtt_probe_common(struct i915_ggtt *ggtt, u64 size)
 	struct drm_i915_private *i915 = ggtt->vm.i915;
 	struct pci_dev *pdev = to_pci_dev(i915->drm.dev);
 	phys_addr_t phys_addr;
-	u32 pte_flags;
-	int ret;
 
 	GEM_WARN_ON(pci_resource_len(pdev, 0) != gen6_gttmmadr_size(i915));
 	phys_addr = pci_resource_start(pdev, 0) + gen6_gttadr_offset(i915);
@@ -463,6 +461,24 @@ static int ggtt_probe_common(struct i915_ggtt *ggtt, u64 size)
 	}
 
 	kref_init(&ggtt->vm.resv_ref);
+
+	return 0;
+}
+
+/**
+ * i915_ggtt_setup_scratch_page - setup ggtt scratch page
+ * @i915: i915 device
+ */
+int i915_ggtt_setup_scratch_page(struct drm_i915_private *i915)
+{
+	struct i915_ggtt *ggtt = to_gt(i915)->ggtt;
+	u32 pte_flags;
+	int ret;
+
+	/* gen5- scratch setup currently happens in @intel_gtt_init */
+	if (GRAPHICS_VER(i915) <= 5)
+		return 0;
+
 	ret = setup_scratch_page(&ggtt->vm);
 	if (ret) {
 		drm_err(&i915->drm, "Scratch setup failed\n");
diff --git a/drivers/gpu/drm/i915/gt/intel_gt_gmch.h b/drivers/gpu/drm/i915/gt/intel_gt_gmch.h
index 75ed55c1f30a..c6b79cb78637 100644
--- a/drivers/gpu/drm/i915/gt/intel_gt_gmch.h
+++ b/drivers/gpu/drm/i915/gt/intel_gt_gmch.h
@@ -15,6 +15,7 @@ int intel_gt_gmch_gen6_probe(struct i915_ggtt *ggtt);
 int intel_gt_gmch_gen8_probe(struct i915_ggtt *ggtt);
 int intel_gt_gmch_gen5_probe(struct i915_ggtt *ggtt);
 int intel_gt_gmch_gen5_enable_hw(struct drm_i915_private *i915);
+int i915_ggtt_setup_scratch_page(struct drm_i915_private *i915);
 
 /* Stubs for non-x86 platforms */
 #else
@@ -41,6 +42,11 @@ static inline int intel_gt_gmch_gen5_enable_hw(struct drm_i915_private *i915)
 	/* No HW should be enabled for this case yet, return fail */
 	return -ENODEV;
 }
+
+static inline int i915_ggtt_setup_scratch_page(struct drm_i915_private *i915)
+{
+	return 0;
+}
 #endif
 
 #endif /* __INTEL_GT_GMCH_H__ */
diff --git a/drivers/gpu/drm/i915/i915_driver.c b/drivers/gpu/drm/i915/i915_driver.c
index d26dcca7e654..4e8a92ffbfe9 100644
--- a/drivers/gpu/drm/i915/i915_driver.c
+++ b/drivers/gpu/drm/i915/i915_driver.c
@@ -69,6 +69,7 @@
 #include "gem/i915_gem_mman.h"
 #include "gem/i915_gem_pm.h"
 #include "gt/intel_gt.h"
+#include "gt/intel_gt_gmch.h"
 #include "gt/intel_gt_pm.h"
 #include "gt/intel_rc6.h"
 
@@ -605,12 +606,16 @@ static int i915_driver_hw_probe(struct drm_i915_private *dev_priv)
 
 	ret = intel_gt_tiles_init(dev_priv);
 	if (ret)
-		goto err_mem_regions;
+		goto err_ggtt;
+
+	ret = i915_ggtt_setup_scratch_page(dev_priv);
+	if (ret)
+		goto err_ggtt;
 
 	ret = i915_ggtt_enable_hw(dev_priv);
 	if (ret) {
 		drm_err(&dev_priv->drm, "failed to enable GGTT\n");
-		goto err_mem_regions;
+		goto err_ggtt;
 	}
 
 	pci_set_master(pdev);
@@ -662,11 +667,10 @@ static int i915_driver_hw_probe(struct drm_i915_private *dev_priv)
 err_msi:
 	if (pdev->msi_enabled)
 		pci_disable_msi(pdev);
-err_mem_regions:
-	intel_memory_regions_driver_release(dev_priv);
 err_ggtt:
 	i915_ggtt_driver_release(dev_priv);
 	i915_gem_drain_freed_objects(dev_priv);
+	intel_memory_regions_driver_release(dev_priv);
 	i915_ggtt_driver_late_release(dev_priv);
 err_perf:
 	i915_perf_fini(dev_priv);
@@ -912,9 +916,9 @@ int i915_driver_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 	intel_modeset_driver_remove_nogem(i915);
 out_cleanup_hw:
 	i915_driver_hw_remove(i915);
-	intel_memory_regions_driver_release(i915);
 	i915_ggtt_driver_release(i915);
 	i915_gem_drain_freed_objects(i915);
+	intel_memory_regions_driver_release(i915);
 	i915_ggtt_driver_late_release(i915);
 out_cleanup_mmio:
 	i915_driver_mmio_release(i915);
@@ -971,9 +975,9 @@ static void i915_driver_release(struct drm_device *dev)
 
 	i915_gem_driver_release(dev_priv);
 
-	intel_memory_regions_driver_release(dev_priv);
 	i915_ggtt_driver_release(dev_priv);
 	i915_gem_drain_freed_objects(dev_priv);
+	intel_memory_regions_driver_release(dev_priv);
 	i915_ggtt_driver_late_release(dev_priv);
 
 	i915_driver_mmio_release(dev_priv);
-- 
2.25.1

[PATCH v2 4/8] drm/i915: allow volatile buffers to use ttm pool allocator

[Robert Beckett]

Internal/volatile buffers should not be shmem backed.
If a volatile buffer is requested, allow ttm to use the pool allocator
to provide volatile pages as backing.
Fix i915_ttm_shrink to handle !is_shmem volatile buffers by purging.

Signed-off-by: Robert Beckett <bob.beckett@collabora.com>
---
 drivers/gpu/drm/i915/gem/i915_gem_ttm.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/i915/gem/i915_gem_ttm.c b/drivers/gpu/drm/i915/gem/i915_gem_ttm.c
index 27d59639177f..8edce04a0509 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_ttm.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_ttm.c
@@ -309,7 +309,8 @@ static struct ttm_tt *i915_ttm_tt_create(struct ttm_buffer_object *bo,
 		page_flags |= TTM_TT_FLAG_ZERO_ALLOC;
 
 	caching = i915_ttm_select_tt_caching(obj);
-	if (i915_gem_object_is_shrinkable(obj) && caching == ttm_cached) {
+	if (i915_gem_object_is_shrinkable(obj) && caching == ttm_cached &&
+	    !i915_gem_object_is_volatile(obj)) {
 		page_flags |= TTM_TT_FLAG_EXTERNAL |
 			      TTM_TT_FLAG_EXTERNAL_MAPPABLE;
 		i915_tt->is_shmem = true;
@@ -531,9 +532,9 @@ static int i915_ttm_shrink(struct drm_i915_gem_object *obj, unsigned int flags)
 	if (!bo->ttm || bo->resource->mem_type != TTM_PL_SYSTEM)
 		return 0;
 
-	GEM_BUG_ON(!i915_tt->is_shmem);
+	GEM_BUG_ON(!i915_tt->is_shmem && obj->mm.madv != I915_MADV_DONTNEED);
 
-	if (!i915_tt->filp)
+	if (i915_tt->is_shmem && !i915_tt->filp)
 		return 0;
 
 	ret = ttm_bo_wait_ctx(bo, &ctx);
-- 
2.25.1

[PATCH v2 5/8] drm/i915: limit ttm to dma32 for i965G[M]

[Robert Beckett]

i965G[M] cannot relocate objects above 4GiB.
Ensure ttm uses dma32 on these systems.

Signed-off-by: Robert Beckett <bob.beckett@collabora.com>
---
 drivers/gpu/drm/i915/intel_region_ttm.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/intel_region_ttm.c b/drivers/gpu/drm/i915/intel_region_ttm.c
index 62ff77445b01..fd2ecfdd8fa1 100644
--- a/drivers/gpu/drm/i915/intel_region_ttm.c
+++ b/drivers/gpu/drm/i915/intel_region_ttm.c
@@ -32,10 +32,15 @@
 int intel_region_ttm_device_init(struct drm_i915_private *dev_priv)
 {
 	struct drm_device *drm = &dev_priv->drm;
+	bool use_dma32 = false;
+
+	/* i965g[m] cannot relocate objects above 4GiB. */
+	if (IS_I965GM(dev_priv) || IS_I965G(dev_priv))
+		use_dma32 = true;
 
 	return ttm_device_init(&dev_priv->bdev, i915_ttm_driver(),
 			       drm->dev, drm->anon_inode->i_mapping,
-			       drm->vma_offset_manager, false, false);
+			       drm->vma_offset_manager, false, use_dma32);
 }
 
 /**
-- 
2.25.1

[PATCH v2 6/8] drm/i915/gem: further fix mman selftest

[Robert Beckett]

In commit 450cede7f380 ("drm/i915/gem: Fix the mman selftest") we fixed up
the mman selftest to allocate user buffers via smem only if we have lmem,
otherwise it uses internal buffers.

As the commit message asserts, we should only be using buffers that
userland should be able to create.
Internal buffers are not intended to be used by userland.

Instead, fix the code to always create buffers from smem.
In the case of integrated, this will create them from the shmem non-ttm
backend, which is fine.

This also fixes up the code to allow conversion of internal backend to
ttm without breaking this test.

Signed-off-by: Robert Beckett <bob.beckett@collabora.com>
---
 .../gpu/drm/i915/gem/selftests/i915_gem_mman.c  | 17 ++++++-----------
 1 file changed, 6 insertions(+), 11 deletions(-)

diff --git a/drivers/gpu/drm/i915/gem/selftests/i915_gem_mman.c b/drivers/gpu/drm/i915/gem/selftests/i915_gem_mman.c
index 5bc93a1ce3e3..ee2ad1281f97 100644
--- a/drivers/gpu/drm/i915/gem/selftests/i915_gem_mman.c
+++ b/drivers/gpu/drm/i915/gem/selftests/i915_gem_mman.c
@@ -594,17 +594,12 @@ static enum i915_mmap_type default_mapping(struct drm_i915_private *i915)
 }
 
 static struct drm_i915_gem_object *
-create_sys_or_internal(struct drm_i915_private *i915,
-		       unsigned long size)
+create_sys(struct drm_i915_private *i915, unsigned long size)
 {
-	if (HAS_LMEM(i915)) {
-		struct intel_memory_region *sys_region =
-			i915->mm.regions[INTEL_REGION_SMEM];
+	struct intel_memory_region *sys_region =
+		i915->mm.regions[INTEL_REGION_SMEM];
 
-		return __i915_gem_object_create_user(i915, size, &sys_region, 1);
-	}
-
-	return i915_gem_object_create_internal(i915, size);
+	return __i915_gem_object_create_user(i915, size, &sys_region, 1);
 }
 
 static bool assert_mmap_offset(struct drm_i915_private *i915,
@@ -615,7 +610,7 @@ static bool assert_mmap_offset(struct drm_i915_private *i915,
 	u64 offset;
 	int ret;
 
-	obj = create_sys_or_internal(i915, size);
+	obj = create_sys(i915, size);
 	if (IS_ERR(obj))
 		return expected && expected == PTR_ERR(obj);
 
@@ -717,7 +712,7 @@ static int igt_mmap_offset_exhaustion(void *arg)
 	}
 
 	/* Fill the hole, further allocation attempts should then fail */
-	obj = create_sys_or_internal(i915, PAGE_SIZE);
+	obj = create_sys(i915, PAGE_SIZE);
 	if (IS_ERR(obj)) {
 		err = PTR_ERR(obj);
 		pr_err("Unable to create object for reclaimed hole\n");
-- 
2.25.1

[PATCH v2 7/8] drm/i915/ttm: trust snooping when gen 6+ when deciding default cache_level

[Robert Beckett]

By default i915_ttm_cache_level() decides I915_CACHE_LLC if HAS_SNOOP.
this is divergent from existing backends code which only considers
HAS_LLC.
Testing shows that trusting snooping on gen5- is unreliable, so limit to
gen6+

Signed-off-by: Robert Beckett <bob.beckett@collabora.com>
---
 drivers/gpu/drm/i915/gem/i915_gem_ttm_move.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/gem/i915_gem_ttm_move.c b/drivers/gpu/drm/i915/gem/i915_gem_ttm_move.c
index 4c1de0b4a10f..e6cce35edb65 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_ttm_move.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_ttm_move.c
@@ -46,7 +46,9 @@ static enum i915_cache_level
 i915_ttm_cache_level(struct drm_i915_private *i915, struct ttm_resource *res,
 		     struct ttm_tt *ttm)
 {
-	return ((HAS_LLC(i915) || HAS_SNOOP(i915)) &&
+	bool can_snoop = HAS_SNOOP(i915) && (GRAPHICS_VER(i915) > 5);
+
+	return ((HAS_LLC(i915) || can_snoop) &&
 		!i915_ttm_gtt_binds_lmem(res) &&
 		ttm->caching == ttm_cached) ? I915_CACHE_LLC :
 		I915_CACHE_NONE;
-- 
2.25.1

[PATCH v2 8/8] drm/i915: internal buffers use ttm backend

[Robert Beckett]

Create a kernel only internal memory region that uses ttm pool allocator to
allocate volatile system pages.
Refactor internal buffer backend to simply allocate from this new
region.

Signed-off-by: Robert Beckett <bob.beckett@collabora.com>
---
 drivers/gpu/drm/i915/gem/i915_gem_internal.c  | 187 +-----------------
 drivers/gpu/drm/i915/gem/i915_gem_internal.h  |   5 -
 drivers/gpu/drm/i915/gem/i915_gem_ttm.h       |   1 +
 .../drm/i915/gem/selftests/i915_gem_mman.c    |   3 +
 drivers/gpu/drm/i915/i915_pci.c               |   4 +-
 drivers/gpu/drm/i915/intel_memory_region.c    |   8 +-
 drivers/gpu/drm/i915/intel_memory_region.h    |   2 +
 .../gpu/drm/i915/selftests/mock_gem_device.c  |   2 +-
 8 files changed, 21 insertions(+), 191 deletions(-)

diff --git a/drivers/gpu/drm/i915/gem/i915_gem_internal.c b/drivers/gpu/drm/i915/gem/i915_gem_internal.c
index c698f95af15f..a83751867ac7 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_internal.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_internal.c
@@ -4,188 +4,9 @@
  * Copyright © 2014-2016 Intel Corporation
  */
 
-#include <linux/scatterlist.h>
-#include <linux/slab.h>
-#include <linux/swiotlb.h>
-
+#include "gem/i915_gem_internal.h"
+#include "gem/i915_gem_region.h"
 #include "i915_drv.h"
-#include "i915_gem.h"
-#include "i915_gem_internal.h"
-#include "i915_gem_object.h"
-#include "i915_scatterlist.h"
-#include "i915_utils.h"
-
-#define QUIET (__GFP_NORETRY | __GFP_NOWARN)
-#define MAYFAIL (__GFP_RETRY_MAYFAIL | __GFP_NOWARN)
-
-static void internal_free_pages(struct sg_table *st)
-{
-	struct scatterlist *sg;
-
-	for (sg = st->sgl; sg; sg = __sg_next(sg)) {
-		if (sg_page(sg))
-			__free_pages(sg_page(sg), get_order(sg->length));
-	}
-
-	sg_free_table(st);
-	kfree(st);
-}
-
-static int i915_gem_object_get_pages_internal(struct drm_i915_gem_object *obj)
-{
-	struct drm_i915_private *i915 = to_i915(obj->base.dev);
-	struct sg_table *st;
-	struct scatterlist *sg;
-	unsigned int sg_page_sizes;
-	unsigned int npages;
-	int max_order;
-	gfp_t gfp;
-
-	max_order = MAX_ORDER;
-#ifdef CONFIG_SWIOTLB
-	if (is_swiotlb_active(obj->base.dev->dev)) {
-		unsigned int max_segment;
-
-		max_segment = swiotlb_max_segment();
-		if (max_segment) {
-			max_segment = max_t(unsigned int, max_segment,
-					    PAGE_SIZE) >> PAGE_SHIFT;
-			max_order = min(max_order, ilog2(max_segment));
-		}
-	}
-#endif
-
-	gfp = GFP_KERNEL | __GFP_HIGHMEM | __GFP_RECLAIMABLE;
-	if (IS_I965GM(i915) || IS_I965G(i915)) {
-		/* 965gm cannot relocate objects above 4GiB. */
-		gfp &= ~__GFP_HIGHMEM;
-		gfp |= __GFP_DMA32;
-	}
-
-create_st:
-	st = kmalloc(sizeof(*st), GFP_KERNEL);
-	if (!st)
-		return -ENOMEM;
-
-	npages = obj->base.size / PAGE_SIZE;
-	if (sg_alloc_table(st, npages, GFP_KERNEL)) {
-		kfree(st);
-		return -ENOMEM;
-	}
-
-	sg = st->sgl;
-	st->nents = 0;
-	sg_page_sizes = 0;
-
-	do {
-		int order = min(fls(npages) - 1, max_order);
-		struct page *page;
-
-		do {
-			page = alloc_pages(gfp | (order ? QUIET : MAYFAIL),
-					   order);
-			if (page)
-				break;
-			if (!order--)
-				goto err;
-
-			/* Limit subsequent allocations as well */
-			max_order = order;
-		} while (1);
-
-		sg_set_page(sg, page, PAGE_SIZE << order, 0);
-		sg_page_sizes |= PAGE_SIZE << order;
-		st->nents++;
-
-		npages -= 1 << order;
-		if (!npages) {
-			sg_mark_end(sg);
-			break;
-		}
-
-		sg = __sg_next(sg);
-	} while (1);
-
-	if (i915_gem_gtt_prepare_pages(obj, st)) {
-		/* Failed to dma-map try again with single page sg segments */
-		if (get_order(st->sgl->length)) {
-			internal_free_pages(st);
-			max_order = 0;
-			goto create_st;
-		}
-		goto err;
-	}
-
-	__i915_gem_object_set_pages(obj, st, sg_page_sizes);
-
-	return 0;
-
-err:
-	sg_set_page(sg, NULL, 0, 0);
-	sg_mark_end(sg);
-	internal_free_pages(st);
-
-	return -ENOMEM;
-}
-
-static void i915_gem_object_put_pages_internal(struct drm_i915_gem_object *obj,
-					       struct sg_table *pages)
-{
-	i915_gem_gtt_finish_pages(obj, pages);
-	internal_free_pages(pages);
-
-	obj->mm.dirty = false;
-
-	__start_cpu_write(obj);
-}
-
-static const struct drm_i915_gem_object_ops i915_gem_object_internal_ops = {
-	.name = "i915_gem_object_internal",
-	.flags = I915_GEM_OBJECT_IS_SHRINKABLE,
-	.get_pages = i915_gem_object_get_pages_internal,
-	.put_pages = i915_gem_object_put_pages_internal,
-};
-
-struct drm_i915_gem_object *
-__i915_gem_object_create_internal(struct drm_i915_private *i915,
-				  const struct drm_i915_gem_object_ops *ops,
-				  phys_addr_t size)
-{
-	static struct lock_class_key lock_class;
-	struct drm_i915_gem_object *obj;
-	unsigned int cache_level;
-
-	GEM_BUG_ON(!size);
-	GEM_BUG_ON(!IS_ALIGNED(size, PAGE_SIZE));
-
-	if (overflows_type(size, obj->base.size))
-		return ERR_PTR(-E2BIG);
-
-	obj = i915_gem_object_alloc();
-	if (!obj)
-		return ERR_PTR(-ENOMEM);
-
-	drm_gem_private_object_init(&i915->drm, &obj->base, size);
-	i915_gem_object_init(obj, ops, &lock_class, 0);
-	obj->mem_flags |= I915_BO_FLAG_STRUCT_PAGE;
-
-	/*
-	 * Mark the object as volatile, such that the pages are marked as
-	 * dontneed whilst they are still pinned. As soon as they are unpinned
-	 * they are allowed to be reaped by the shrinker, and the caller is
-	 * expected to repopulate - the contents of this object are only valid
-	 * whilst active and pinned.
-	 */
-	i915_gem_object_set_volatile(obj);
-
-	obj->read_domains = I915_GEM_DOMAIN_CPU;
-	obj->write_domain = I915_GEM_DOMAIN_CPU;
-
-	cache_level = HAS_LLC(i915) ? I915_CACHE_LLC : I915_CACHE_NONE;
-	i915_gem_object_set_cache_coherency(obj, cache_level);
-
-	return obj;
-}
 
 /**
  * i915_gem_object_create_internal: create an object with volatile pages
@@ -206,5 +27,7 @@ struct drm_i915_gem_object *
 i915_gem_object_create_internal(struct drm_i915_private *i915,
 				phys_addr_t size)
 {
-	return __i915_gem_object_create_internal(i915, &i915_gem_object_internal_ops, size);
+	return i915_gem_object_create_region(i915->mm.regions[INTEL_REGION_INTERNAL],
+					     size, 0, I915_BO_ALLOC_VOLATILE);
 }
+
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_internal.h b/drivers/gpu/drm/i915/gem/i915_gem_internal.h
index 6664e06112fc..524e1042b20f 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_internal.h
+++ b/drivers/gpu/drm/i915/gem/i915_gem_internal.h
@@ -15,9 +15,4 @@ struct drm_i915_private;
 struct drm_i915_gem_object *
 i915_gem_object_create_internal(struct drm_i915_private *i915,
 				phys_addr_t size);
-struct drm_i915_gem_object *
-__i915_gem_object_create_internal(struct drm_i915_private *i915,
-				  const struct drm_i915_gem_object_ops *ops,
-				  phys_addr_t size);
-
 #endif /* __I915_GEM_INTERNAL_H__ */
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_ttm.h b/drivers/gpu/drm/i915/gem/i915_gem_ttm.h
index 73e371aa3850..cb4cab8a13e1 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_ttm.h
+++ b/drivers/gpu/drm/i915/gem/i915_gem_ttm.h
@@ -92,4 +92,5 @@ static inline bool i915_ttm_cpu_maps_iomem(struct ttm_resource *mem)
 	/* Once / if we support GGTT, this is also false for cached ttm_tts */
 	return mem->mem_type != I915_PL_SYSTEM;
 }
+
 #endif
diff --git a/drivers/gpu/drm/i915/gem/selftests/i915_gem_mman.c b/drivers/gpu/drm/i915/gem/selftests/i915_gem_mman.c
index ee2ad1281f97..dcb2bda6cbc5 100644
--- a/drivers/gpu/drm/i915/gem/selftests/i915_gem_mman.c
+++ b/drivers/gpu/drm/i915/gem/selftests/i915_gem_mman.c
@@ -864,6 +864,9 @@ static bool can_mmap(struct drm_i915_gem_object *obj, enum i915_mmap_type type)
 	struct drm_i915_private *i915 = to_i915(obj->base.dev);
 	bool no_map;
 
+	if (obj->mm.region && obj->mm.region->private)
+		return false;
+
 	if (obj->ops->mmap_offset)
 		return type == I915_MMAP_TYPE_FIXED;
 	else if (type == I915_MMAP_TYPE_FIXED)
diff --git a/drivers/gpu/drm/i915/i915_pci.c b/drivers/gpu/drm/i915/i915_pci.c
index a5a1a7647320..7ba7becdf71c 100644
--- a/drivers/gpu/drm/i915/i915_pci.c
+++ b/drivers/gpu/drm/i915/i915_pci.c
@@ -159,7 +159,7 @@
 	.page_sizes = I915_GTT_PAGE_SIZE_4K
 
 #define GEN_DEFAULT_REGIONS \
-	.memory_regions = REGION_SMEM | REGION_STOLEN_SMEM
+	.memory_regions = REGION_SMEM | REGION_STOLEN_SMEM | REGION_INTERNAL
 
 #define I830_FEATURES \
 	GEN(2), \
@@ -905,7 +905,7 @@ static const struct intel_device_info rkl_info = {
 };
 
 #define DGFX_FEATURES \
-	.memory_regions = REGION_SMEM | REGION_LMEM | REGION_STOLEN_LMEM, \
+	.memory_regions = REGION_SMEM | REGION_LMEM | REGION_STOLEN_LMEM | REGION_INTERNAL, \
 	.has_llc = 0, \
 	.has_pxp = 0, \
 	.has_snoop = 1, \
diff --git a/drivers/gpu/drm/i915/intel_memory_region.c b/drivers/gpu/drm/i915/intel_memory_region.c
index e38d2db1c3e3..a91756fcee85 100644
--- a/drivers/gpu/drm/i915/intel_memory_region.c
+++ b/drivers/gpu/drm/i915/intel_memory_region.c
@@ -31,6 +31,10 @@ static const struct {
 		.class = INTEL_MEMORY_STOLEN_LOCAL,
 		.instance = 0,
 	},
+	[INTEL_REGION_INTERNAL] = {
+		.class = INTEL_MEMORY_SYSTEM,
+		.instance = 1,
+	}
 };
 
 static int __iopagetest(struct intel_memory_region *mem,
@@ -309,12 +313,14 @@ int intel_memory_regions_hw_probe(struct drm_i915_private *i915)
 		instance = intel_region_map[i].instance;
 		switch (type) {
 		case INTEL_MEMORY_SYSTEM:
-			if (IS_DGFX(i915))
+			if (IS_DGFX(i915) || i == INTEL_REGION_INTERNAL)
 				mem = i915_gem_ttm_system_setup(i915, type,
 								instance);
 			else
 				mem = i915_gem_shmem_setup(i915, type,
 							   instance);
+			if (i == INTEL_REGION_INTERNAL)
+				mem->private = true;
 			break;
 		case INTEL_MEMORY_STOLEN_LOCAL:
 			mem = i915_gem_stolen_lmem_setup(i915, type, instance);
diff --git a/drivers/gpu/drm/i915/intel_memory_region.h b/drivers/gpu/drm/i915/intel_memory_region.h
index 3d8378c1b447..4038913bc467 100644
--- a/drivers/gpu/drm/i915/intel_memory_region.h
+++ b/drivers/gpu/drm/i915/intel_memory_region.h
@@ -35,6 +35,7 @@ enum intel_region_id {
 	INTEL_REGION_LMEM_3,
 	INTEL_REGION_STOLEN_SMEM,
 	INTEL_REGION_STOLEN_LMEM,
+	INTEL_REGION_INTERNAL,
 	INTEL_REGION_UNKNOWN, /* Should be last */
 };
 
@@ -42,6 +43,7 @@ enum intel_region_id {
 #define REGION_LMEM     BIT(INTEL_REGION_LMEM_0)
 #define REGION_STOLEN_SMEM   BIT(INTEL_REGION_STOLEN_SMEM)
 #define REGION_STOLEN_LMEM   BIT(INTEL_REGION_STOLEN_LMEM)
+#define REGION_INTERNAL	BIT(INTEL_REGION_INTERNAL)
 
 #define I915_ALLOC_CONTIGUOUS     BIT(0)
 
diff --git a/drivers/gpu/drm/i915/selftests/mock_gem_device.c b/drivers/gpu/drm/i915/selftests/mock_gem_device.c
index 9c31a16f8380..eaa169effedc 100644
--- a/drivers/gpu/drm/i915/selftests/mock_gem_device.c
+++ b/drivers/gpu/drm/i915/selftests/mock_gem_device.c
@@ -179,7 +179,7 @@ struct drm_i915_private *mock_gem_device(void)
 		I915_GTT_PAGE_SIZE_64K |
 		I915_GTT_PAGE_SIZE_2M;
 
-	mkwrite_device_info(i915)->memory_regions = REGION_SMEM;
+	mkwrite_device_info(i915)->memory_regions = REGION_SMEM | REGION_INTERNAL;
 	intel_memory_regions_hw_probe(i915);
 
 	spin_lock_init(&i915->gpu_error.lock);
-- 
2.25.1