drm/i915: Asynchronous vma unbinding

Introduce vma resources, sort of similar to TTM resources, needed for asynchronous bind management. Initially we will use them to hold completion of unbinding when we capture data from a vma, but they will be used extensively in upcoming patches for asynchronous vma unbinding.

Signed-off-by Thomas Hellström <[email protected]>

---
  drivers/gpu/drm/i915/Makefile                 |   1 +
  .../gpu/drm/i915/gem/i915_gem_execbuffer.c    |   2 +-
  drivers/gpu/drm/i915/i915_vma.c               |  55 +++++++-
  drivers/gpu/drm/i915/i915_vma.h               |  19 ++-
  drivers/gpu/drm/i915/i915_vma_resource.c      | 124 ++++++++++++++++++
  drivers/gpu/drm/i915/i915_vma_resource.h      |  70 ++++++++++
  drivers/gpu/drm/i915/i915_vma_snapshot.c      |  15 +--
  drivers/gpu/drm/i915/i915_vma_snapshot.h      |   7 +-
  drivers/gpu/drm/i915/i915_vma_types.h         |   5 +
  drivers/gpu/drm/i915/selftests/i915_gem_gtt.c |  99 ++++++++------
  10 files changed, 334 insertions(+), 63 deletions(-)

create mode 100644 drivers/gpu/drm/i915/i915_vma_resource.c create mode 100644 drivers/gpu/drm/i915/i915_vma_resource.h

drivers/gpu/drm/i915/Makefile +1 -0

index 1b62b9f65196..98433ad74194 100644
@@ -174,6 +174,7 @@ i915-y += \
  	  i915_trace_points.o \
  	  i915_ttm_buddy_manager.o \
  	  i915_vma.o \
+	  i915_vma_resource.o \
  	  i915_vma_snapshot.o \
  	  intel_wopcm.o
 

drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c +1 -1

index e9541244027a..72e497745c12 100644
@@ -1422,7 +1422,7 @@ eb_relocate_entry(struct i915_execbuffer *eb,
  			mutex_lock(&vma->vm->mutex);
  			err = i915_vma_bind(target->vma,
  					    target->vma->obj->cache_level,
-					    PIN_GLOBAL, NULL);
+					    PIN_GLOBAL, NULL, NULL);
  			mutex_unlock(&vma->vm->mutex);
  			reloc_cache_remap(&eb->reloc_cache, ev->vma->obj);
  			if (err)

drivers/gpu/drm/i915/i915_vma.c +49 -6

index be208a8f1ed0..7097c5016431 100644
@@ -37,6 +37,7 @@
  #include "i915_sw_fence_work.h"
  #include "i915_trace.h"
  #include "i915_vma.h"
+#include "i915_vma_resource.h"
 
  static struct kmem_cache *slab_vmas;
 

@@ -380,6 +381,8 @@ static int i915_vma_verify_bind_complete(struct i915_vma *vma)
   * @cache_level: mapping cache level
   * @flags: flags like global or local mapping
   * @work: preallocated worker for allocating and binding the PTE
+ * @vma_res: pointer to a preallocated vma resource. The resource is either
+ * consumed or freed.
   *
   * DMA addresses are taken from the scatter-gather table of this object (or of
   * this VMA in case of non-default GGTT views) and PTE entries set up.

@@ -388,7 +391,8 @@ static int i915_vma_verify_bind_complete(struct i915_vma *vma)
  int i915_vma_bind(struct i915_vma *vma,
  		  enum i915_cache_level cache_level,
  		  u32 flags,
-		  struct i915_vma_work *work)
+		  struct i915_vma_work *work,
+		  struct i915_vma_resource *vma_res)
  {
  	u32 bind_flags;
  	u32 vma_flags;

@@ -399,11 +403,15 @@ int i915_vma_bind(struct i915_vma *vma,
 
  	if (GEM_DEBUG_WARN_ON(range_overflows(vma->node.start,
  					      vma->node.size,
-					      vma->vm->total)))
+					      vma->vm->total))) {
+		kfree(vma_res);
  		return -ENODEV;
+	}
 
-	if (GEM_DEBUG_WARN_ON(!flags))
+	if (GEM_DEBUG_WARN_ON(!flags)) {
+		kfree(vma_res);
  		return -EINVAL;
+	}
 
  	bind_flags = flags;
  	bind_flags &= I915_VMA_GLOBAL_BIND | I915_VMA_LOCAL_BIND;

@@ -412,11 +420,21 @@ int i915_vma_bind(struct i915_vma *vma,
  	vma_flags &= I915_VMA_GLOBAL_BIND | I915_VMA_LOCAL_BIND;
 
  	bind_flags &= ~vma_flags;
-	if (bind_flags == 0)
+	if (bind_flags == 0) {
+		kfree(vma_res);
  		return 0;
+	}
 
  	GEM_BUG_ON(!atomic_read(&vma->pages_count));
 
+	if (vma->resource || !vma_res) {
+		/* Rebinding with an additional I915_VMA_*_BIND */
+		GEM_WARN_ON(!vma_flags);
+		kfree(vma_res);
+	} else {
+		i915_vma_resource_init(vma_res);
+		vma->resource = vma_res;
+	}
  	trace_i915_vma_bind(vma, bind_flags);
  	if (work && bind_flags & vma->vm->bind_async_flags) {
  		struct dma_fence *prev;

@@ -1279,6 +1297,7 @@ int i915_vma_pin_ww(struct i915_vma *vma, struct i915_gem_ww_ctx *ww,
  {
  	struct i915_vma_work *work = NULL;
  	struct dma_fence *moving = NULL;
+	struct i915_vma_resource *vma_res = NULL;
  	intel_wakeref_t wakeref = 0;
  	unsigned int bound;
  	int err;

@@ -1333,6 +1352,12 @@ int i915_vma_pin_ww(struct i915_vma *vma, struct i915_gem_ww_ctx *ww,
  		}
  	}
 
+	vma_res = i915_vma_resource_alloc();
+	if (IS_ERR(vma_res)) {
+		err = PTR_ERR(vma_res);
+		goto err_fence;
+	}
+
  	/*
  	 * Differentiate between user/kernel vma inside the aliasing-ppgtt.
  	 *

@@ -1353,7 +1378,7 @@ int i915_vma_pin_ww(struct i915_vma *vma, struct i915_gem_ww_ctx *ww,
  	err = mutex_lock_interruptible_nested(&vma->vm->mutex,
  					      !(flags & PIN_GLOBAL));
  	if (err)
-		goto err_fence;
+		goto err_vma_res;
 
  	/* No more allocations allowed now we hold vm->mutex */
 

@@ -1394,7 +1419,8 @@ int i915_vma_pin_ww(struct i915_vma *vma, struct i915_gem_ww_ctx *ww,
  	GEM_BUG_ON(!vma->pages);
  	err = i915_vma_bind(vma,
  			    vma->obj->cache_level,
-			    flags, work);
+			    flags, work, vma_res);
+	vma_res = NULL;
  	if (err)
  		goto err_remove;
 

@@ -1417,6 +1443,8 @@ int i915_vma_pin_ww(struct i915_vma *vma, struct i915_gem_ww_ctx *ww,
  	i915_active_release(&vma->active);
  err_unlock:
  	mutex_unlock(&vma->vm->mutex);
+err_vma_res:
+	kfree(vma_res);
  err_fence:
  	if (work)
  		dma_fence_work_commit_imm(&work->base);

@@ -1567,6 +1595,7 @@ void i915_vma_release(struct kref *ref)
  	i915_vm_put(vma->vm);
 
  	i915_active_fini(&vma->active);
+	GEM_WARN_ON(vma->resource);
  	i915_vma_free(vma);
  }
 

@@ -1715,6 +1744,8 @@ int _i915_vma_move_to_active(struct i915_vma *vma,
 
  void __i915_vma_evict(struct i915_vma *vma)
  {
+	struct dma_fence *unbind_fence;
+
  	GEM_BUG_ON(i915_vma_is_pinned(vma));
 
  	if (i915_vma_is_map_and_fenceable(vma)) {

@@ -1752,8 +1783,20 @@ void __i915_vma_evict(struct i915_vma *vma)
  	atomic_and(~(I915_VMA_BIND_MASK | I915_VMA_ERROR | I915_VMA_GGTT_WRITE),
  		   &vma->flags);
 
+	unbind_fence = i915_vma_resource_unbind(vma->resource);
+	i915_vma_resource_put(vma->resource);
+	vma->resource = NULL;
+
  	i915_vma_detach(vma);
  	vma_unbind_pages(vma);
+
+	/*
+	 * This uninterruptible wait under the vm mutex is currently
+	 * only ever blocking while the vma is being captured from.
+	 * With async unbinding, this wait here will be removed.
+	 */
+	dma_fence_wait(unbind_fence, false);
+	dma_fence_put(unbind_fence);
  }
 
  int __i915_vma_unbind(struct i915_vma *vma)

drivers/gpu/drm/i915/i915_vma.h +18 -1

index 32719431b3df..de0f3e44cdfa 100644
@@ -37,6 +37,7 @@
 
  #include "i915_active.h"
  #include "i915_request.h"
+#include "i915_vma_resource.h"
  #include "i915_vma_types.h"
 
  struct i915_vma *

@@ -204,7 +205,8 @@ struct i915_vma_work *i915_vma_work(void);
  int i915_vma_bind(struct i915_vma *vma,
  		  enum i915_cache_level cache_level,
  		  u32 flags,
-		  struct i915_vma_work *work);
+		  struct i915_vma_work *work,
+		  struct i915_vma_resource *vma_res);
 
  bool i915_gem_valid_gtt_space(struct i915_vma *vma, unsigned long color);
  bool i915_vma_misplaced(const struct i915_vma *vma,

@@ -428,6 +430,21 @@ static inline int i915_vma_sync(struct i915_vma *vma)
  	return i915_active_wait(&vma->active);
  }
 
+/**
+ * i915_vma_get_current_resource - Get the current resource of the vma
+ * @vma: The vma to get the current resource from.
+ *
+ * It's illegal to call this function if the vma is not bound.
+ *
+ * Return: A refcounted pointer to the current vma resource
+ * of the vma, assuming the vma is bound.
+ */
+static inline struct i915_vma_resource *
+i915_vma_get_current_resource(struct i915_vma *vma)
+{
+	return i915_vma_resource_get(vma->resource);
+}
+
  void i915_vma_module_exit(void);
  int i915_vma_module_init(void);
 

drivers/gpu/drm/i915/i915_vma_resource.c new file +83 -0

new file mode 100644
index 000000000000..833e987bed2a
@@ -0,0 +1,124 @@
+// SPDX-License-Identifier: MIT
+/*
+ * Copyright © 2021 Intel Corporation
+ */
+#include <linux/slab.h>
+
+#include "i915_vma_resource.h"
+
+/* Callbacks for the unbind dma-fence. */
+static const char *get_driver_name(struct dma_fence *fence)
+{
+	return "vma unbind fence";
+}
+
+static const char *get_timeline_name(struct dma_fence *fence)
+{
+	return "unbound";
+}
+
+static struct dma_fence_ops unbind_fence_ops = {
+	.get_driver_name = get_driver_name,
+	.get_timeline_name = get_timeline_name,
+};
+
+/**
+ * i915_vma_resource_init - Initialize a vma resource.
+ * @vma_res: The vma resource to initialize
+ *
+ * Initializes a vma resource allocated using i915_vma_resource_alloc().
+ * The reason for having separate allocate and initialize function is that
+ * initialization may need to be performed from under a lock where
+ * allocation is not allowed.
+ */
+void i915_vma_resource_init(struct i915_vma_resource *vma_res)
+{
+	spin_lock_init(&vma_res->lock);
+	dma_fence_init(&vma_res->unbind_fence, &unbind_fence_ops,
+		       &vma_res->lock, 0, 0);
+	refcount_set(&vma_res->hold_count, 1);
+}
+
+/**
+ * i915_vma_resource_alloc - Allocate a vma resource
+ *
+ * Return: A pointer to a cleared struct i915_vma_resource or
+ * a -ENOMEM error pointer if allocation fails.
+ */
+struct i915_vma_resource *i915_vma_resource_alloc(void)
+{
+	struct i915_vma_resource *vma_res =
+		kzalloc(sizeof(*vma_res), GFP_KERNEL);
+
+	return vma_res ? vma_res : ERR_PTR(-ENOMEM);
+}
+
+static void __i915_vma_resource_unhold(struct i915_vma_resource *vma_res)
+{
+	if (refcount_dec_and_test(&vma_res->hold_count))
+		dma_fence_signal(&vma_res->unbind_fence);
+}
+
+/**
+ * i915_vma_resource_unhold - Unhold the signaling of the vma resource unbind
+ * fence.
+ * @vma_res: The vma resource.
+ * @lockdep_cookie: The lockdep cookie returned from i915_vma_resource_hold.
+ *
+ * The function may leave a dma_fence critical section.
+ */
+void i915_vma_resource_unhold(struct i915_vma_resource *vma_res,
+			      bool lockdep_cookie)
+{
+	dma_fence_end_signalling(lockdep_cookie);
+
+	if (IS_ENABLED(CONFIG_PROVE_LOCKING)) {
+		unsigned long irq_flags;
+
+		/* Inefficient open-coded might_lock_irqsave() */
+		spin_lock_irqsave(&vma_res->lock, irq_flags);
+		spin_unlock_irqrestore(&vma_res->lock, irq_flags);
+	}
+
+	__i915_vma_resource_unhold(vma_res);

drivers/gpu/drm/i915/i915_vma_resource.c new file +31 -0

+ *
+ * Return: true if holding successful, false if not.
+ */
+bool i915_vma_resource_hold(struct i915_vma_resource *vma_res,
+			    bool *lockdep_cookie)
+{
+	bool held = refcount_inc_not_zero(&vma_res->hold_count);
+
+	if (held)
+		*lockdep_cookie = dma_fence_begin_signalling();
+
+	return held;
+}
+
+/**
+ * i915_vma_resource_unbind - Unbind a vma resource
+ * @vma_res: The vma resource to unbind.
+ *
+ * At this point this function does little more than publish a fence that
+ * signals immediately unless signaling is held back.
+ *
+ * Return: A refcounted pointer to a dma-fence that signals when unbinding is
+ * complete.
+ */
+struct dma_fence *
+i915_vma_resource_unbind(struct i915_vma_resource *vma_res)
+{
+	__i915_vma_resource_unhold(vma_res);
+	dma_fence_get(&vma_res->unbind_fence);
+	return &vma_res->unbind_fence;
+}

drivers/gpu/drm/i915/i915_vma_resource.h new file +9 -0

new file mode 100644
index 000000000000..34744da23072
@@ -0,0 +1,70 @@
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright © 2021 Intel Corporation
+ */
+
+#ifndef __I915_VMA_RESOURCE_H__
+#define __I915_VMA_RESOURCE_H__
+
+#include <linux/dma-fence.h>

When introducing asynchronous unbinding, the vma itself may no longer be alive when the actual binding or unbinding takes place.

Update the gtt i915_vma_ops accordingly to take a struct i915_vma_resource instead of a struct i915_vma for the bind_vma() and unbind_vma() ops. Similarly change the insert_entries() op for struct i915_address_space.

Replace a couple of i915_vma_snapshot members with their newly introduced i915_vma_resource counterparts, since they have the same lifetime.

Also make sure to avoid changing the struct i915_vma_flags (in particular the bind flags) async. That should now only be done sync under the vm mutex.

v2:
- Update the vma_res::bound_flags when binding to the aliased ggtt

Signed-off-by Thomas Hellström <[email protected]>

---
  drivers/gpu/drm/i915/display/intel_dpt.c      | 27 ++---
  .../gpu/drm/i915/gem/i915_gem_object_types.h  | 27 +----
  .../gpu/drm/i915/gem/selftests/huge_pages.c   | 37 +++----
  drivers/gpu/drm/i915/gt/gen6_ppgtt.c          | 19 ++--
  drivers/gpu/drm/i915/gt/gen8_ppgtt.c          | 37 +++----
  drivers/gpu/drm/i915/gt/intel_engine_cs.c     |  4 +-
  drivers/gpu/drm/i915/gt/intel_ggtt.c          | 70 ++++++-------
  drivers/gpu/drm/i915/gt/intel_gtt.h           | 16 +--
  drivers/gpu/drm/i915/gt/intel_ppgtt.c         | 22 +++--
  drivers/gpu/drm/i915/gt/uc/intel_uc_fw.c      | 13 ++-
  drivers/gpu/drm/i915/gt/uc/intel_uc_fw.h      |  2 +-
  drivers/gpu/drm/i915/i915_debugfs.c           |  3 +-
  drivers/gpu/drm/i915/i915_gpu_error.c         |  6 +-
  drivers/gpu/drm/i915/i915_vma.c               | 24 ++++-
  drivers/gpu/drm/i915/i915_vma.h               | 11 +--
  drivers/gpu/drm/i915/i915_vma_resource.c      |  9 +-
  drivers/gpu/drm/i915/i915_vma_resource.h      | 99 ++++++++++++++++++-
  drivers/gpu/drm/i915/i915_vma_snapshot.c      |  4 -
  drivers/gpu/drm/i915/i915_vma_snapshot.h      |  8 --
  drivers/gpu/drm/i915/selftests/i915_gem_gtt.c | 64 ++++++++----
  drivers/gpu/drm/i915/selftests/mock_gtt.c     | 12 +--
  21 files changed, 308 insertions(+), 206 deletions(-)

drivers/gpu/drm/i915/display/intel_dpt.c +15 -12

index 8f674745e7e0..63a83d5f85a1 100644
@@ -48,7 +48,7 @@ static void dpt_insert_page(struct i915_address_space *vm,
  }
 
  static void dpt_insert_entries(struct i915_address_space *vm,
-			       struct i915_vma *vma,
+			       struct i915_vma_resource *vma_res,
  			       enum i915_cache_level level,
  			       u32 flags)
  {

@@ -64,8 +64,8 @@ static void dpt_insert_entries(struct i915_address_space *vm,
  	 * not to allow the user to override access to a read only page.
  	 */
 
-	i = vma->node.start / I915_GTT_PAGE_SIZE;
-	for_each_sgt_daddr(addr, sgt_iter, vma->pages)
+	i = vma_res->start / I915_GTT_PAGE_SIZE;
+	for_each_sgt_daddr(addr, sgt_iter, vma_res->bi.pages)
  		gen8_set_pte(&base[i++], pte_encode | addr);
  }
 

@@ -76,35 +76,38 @@ static void dpt_clear_range(struct i915_address_space *vm,
 
  static void dpt_bind_vma(struct i915_address_space *vm,
  			 struct i915_vm_pt_stash *stash,
-			 struct i915_vma *vma,
+			 struct i915_vma_resource *vma_res,
  			 enum i915_cache_level cache_level,
  			 u32 flags)
  {
-	struct drm_i915_gem_object *obj = vma->obj;
  	u32 pte_flags;
 
+	if (vma_res->bound_flags)
+		return;
+
  	/* Applicable to VLV (gen8+ do not support RO in the GGTT) */
  	pte_flags = 0;
-	if (vma->vm->has_read_only && i915_gem_object_is_readonly(obj))
+	if (vm->has_read_only && vma_res->bi.readonly)
  		pte_flags |= PTE_READ_ONLY;
-	if (i915_gem_object_is_lmem(obj))
+	if (vma_res->bi.lmem)
  		pte_flags |= PTE_LM;
 
-	vma->vm->insert_entries(vma->vm, vma, cache_level, pte_flags);
+	vm->insert_entries(vm, vma_res, cache_level, pte_flags);
 
-	vma->page_sizes.gtt = I915_GTT_PAGE_SIZE;
+	vma_res->page_sizes_gtt = I915_GTT_PAGE_SIZE;
 
  	/*
  	 * Without aliasing PPGTT there's no difference between
  	 * GLOBAL/LOCAL_BIND, it's all the same ptes. Hence unconditionally
  	 * upgrade to both bound if we bind either to avoid double-binding.
  	 */
-	atomic_or(I915_VMA_GLOBAL_BIND | I915_VMA_LOCAL_BIND, &vma->flags);
+	vma_res->bound_flags = I915_VMA_GLOBAL_BIND | I915_VMA_LOCAL_BIND;
  }
 
-static void dpt_unbind_vma(struct i915_address_space *vm, struct i915_vma *vma)
+static void dpt_unbind_vma(struct i915_address_space *vm,
+			   struct i915_vma_resource *vma_res)
  {
-	vm->clear_range(vm, vma->node.start, vma->size);
+	vm->clear_range(vm, vma_res->start, vma_res->vma_size);
  }
 
  static void dpt_cleanup(struct i915_address_space *vm)

drivers/gpu/drm/i915/gem/i915_gem_object_types.h +2 -25

index f9f7e44099fe..f99d260e0684 100644
@@ -15,6 +15,7 @@
 
  #include "i915_active.h"
  #include "i915_selftest.h"
+#include "i915_vma_resource.h"
 
  struct drm_i915_gem_object;
  struct intel_fronbuffer;

@@ -549,31 +550,7 @@ struct drm_i915_gem_object {
  		struct sg_table *pages;
  		void *mapping;
 
-		struct i915_page_sizes {
-			/**
-			 * The sg mask of the pages sg_table. i.e the mask of
-			 * of the lengths for each sg entry.
-			 */
-			unsigned int phys;
-
-			/**
-			 * The gtt page sizes we are allowed to use given the
-			 * sg mask and the supported page sizes. This will
-			 * express the smallest unit we can use for the whole
-			 * object, as well as the larger sizes we may be able
-			 * to use opportunistically.
-			 */
-			unsigned int sg;
-
-			/**
-			 * The actual gtt page size usage. Since we can have
-			 * multiple vma associated with this object we need to
-			 * prevent any trampling of state, hence a copy of this
-			 * struct also lives in each vma, therefore the gtt
-			 * value here should only be read/write through the vma.
-			 */
-			unsigned int gtt;
-		} page_sizes;
+		struct i915_page_sizes page_sizes;
 
  		I915_SELFTEST_DECLARE(unsigned int page_mask);
 

drivers/gpu/drm/i915/gem/selftests/huge_pages.c +16 -21

index 11f0aa65f8a3..26f997c376a2 100644
@@ -370,9 +370,9 @@ static int igt_check_page_sizes(struct i915_vma *vma)
  		err = -EINVAL;
  	}
 
-	if (!HAS_PAGE_SIZES(i915, vma->page_sizes.gtt)) {
+	if (!HAS_PAGE_SIZES(i915, vma->resource->page_sizes_gtt)) {
  		pr_err("unsupported page_sizes.gtt=%u, supported=%u\n",
-		       vma->page_sizes.gtt & ~supported, supported);
+		       vma->resource->page_sizes_gtt & ~supported, supported);
  		err = -EINVAL;
  	}
 

@@ -403,15 +403,9 @@ static int igt_check_page_sizes(struct i915_vma *vma)
  	if (i915_gem_object_is_lmem(obj) &&
  	    IS_ALIGNED(vma->node.start, SZ_2M) &&
  	    vma->page_sizes.sg & SZ_2M &&
-	    vma->page_sizes.gtt < SZ_2M) {
+	    vma->resource->page_sizes_gtt < SZ_2M) {
  		pr_err("gtt pages mismatch for LMEM, expected 2M GTT pages, sg(%u), gtt(%u)\n",
-		       vma->page_sizes.sg, vma->page_sizes.gtt);
-		err = -EINVAL;
-	}
-
-	if (obj->mm.page_sizes.gtt) {
-		pr_err("obj->page_sizes.gtt(%u) should never be set\n",
-		       obj->mm.page_sizes.gtt);
+		       vma->page_sizes.sg, vma->resource->page_sizes_gtt);
  		err = -EINVAL;
  	}
 

@@ -547,9 +541,9 @@ static int igt_mock_memory_region_huge_pages(void *arg)
  				goto out_unpin;
  			}
 
-			if (vma->page_sizes.gtt != page_size) {
+			if (vma->resource->page_sizes_gtt != page_size) {
  				pr_err("%s page_sizes.gtt=%u, expected=%u\n",
-				       __func__, vma->page_sizes.gtt,
+				       __func__, vma->resource->page_sizes_gtt,
  				       page_size);
  				err = -EINVAL;
  				goto out_unpin;

@@ -630,9 +624,9 @@ static int igt_mock_ppgtt_misaligned_dma(void *arg)
 
  		err = igt_check_page_sizes(vma);
 
-		if (vma->page_sizes.gtt != page_size) {
+		if (vma->resource->page_sizes_gtt != page_size) {
  			pr_err("page_sizes.gtt=%u, expected %u\n",
-			       vma->page_sizes.gtt, page_size);
+			       vma->resource->page_sizes_gtt, page_size);
  			err = -EINVAL;
  		}
 

@@ -657,9 +651,10 @@ static int igt_mock_ppgtt_misaligned_dma(void *arg)
 
  			err = igt_check_page_sizes(vma);
 
-			if (vma->page_sizes.gtt != I915_GTT_PAGE_SIZE_4K) {
+			if (vma->resource->page_sizes_gtt != I915_GTT_PAGE_SIZE_4K) {
  				pr_err("page_sizes.gtt=%u, expected %llu\n",
-				       vma->page_sizes.gtt, I915_GTT_PAGE_SIZE_4K);
+				       vma->resource->page_sizes_gtt,
+				       I915_GTT_PAGE_SIZE_4K);
  				err = -EINVAL;
  			}
 

@@ -805,9 +800,9 @@ static int igt_mock_ppgtt_huge_fill(void *arg)
  			}
  		}
 
-		if (vma->page_sizes.gtt != expected_gtt) {
+		if (vma->resource->page_sizes_gtt != expected_gtt) {
  			pr_err("gtt=%u, expected=%u, size=%zd, single=%s\n",
-			       vma->page_sizes.gtt, expected_gtt,
+			       vma->resource->page_sizes_gtt, expected_gtt,
  			       obj->base.size, yesno(!!single));
  			err = -EINVAL;
  			break;

@@ -961,10 +956,10 @@ static int igt_mock_ppgtt_64K(void *arg)
  				}
  			}
 
-			if (vma->page_sizes.gtt != expected_gtt) {
+			if (vma->resource->page_sizes_gtt != expected_gtt) {
  				pr_err("gtt=%u, expected=%u, i=%d, single=%s\n",
-				       vma->page_sizes.gtt, expected_gtt, i,
-				       yesno(!!single));
+				       vma->resource->page_sizes_gtt,
+				       expected_gtt, i, yesno(!!single));
  				err = -EINVAL;
  				goto out_vma_unpin;
  			}

drivers/gpu/drm/i915/gt/gen6_ppgtt.c +10 -9

index 6e9292918bfc..d657ffd6c86a 100644
@@ -104,17 +104,17 @@ static void gen6_ppgtt_clear_range(struct i915_address_space *vm,
  }
 
  static void gen6_ppgtt_insert_entries(struct i915_address_space *vm,
-				      struct i915_vma *vma,
+				      struct i915_vma_resource *vma_res,
  				      enum i915_cache_level cache_level,
  				      u32 flags)
  {
  	struct i915_ppgtt *ppgtt = i915_vm_to_ppgtt(vm);
  	struct i915_page_directory * const pd = ppgtt->pd;
-	unsigned int first_entry = vma->node.start / I915_GTT_PAGE_SIZE;
+	unsigned int first_entry = vma_res->start / I915_GTT_PAGE_SIZE;
  	unsigned int act_pt = first_entry / GEN6_PTES;
  	unsigned int act_pte = first_entry % GEN6_PTES;
  	const u32 pte_encode = vm->pte_encode(0, cache_level, flags);
-	struct sgt_dma iter = sgt_dma(vma);
+	struct sgt_dma iter = sgt_dma(vma_res);
  	gen6_pte_t *vaddr;
 
  	GEM_BUG_ON(!pd->entry[act_pt]);

@@ -140,7 +140,7 @@ static void gen6_ppgtt_insert_entries(struct i915_address_space *vm,
  		}
  	} while (1);
 
-	vma->page_sizes.gtt = I915_GTT_PAGE_SIZE;
+	vma_res->page_sizes_gtt = I915_GTT_PAGE_SIZE;
  }
 
  static void gen6_flush_pd(struct gen6_ppgtt *ppgtt, u64 start, u64 end)

@@ -271,13 +271,13 @@ static void gen6_ppgtt_cleanup(struct i915_address_space *vm)
 
  static void pd_vma_bind(struct i915_address_space *vm,
  			struct i915_vm_pt_stash *stash,
-			struct i915_vma *vma,
+			struct i915_vma_resource *vma_res,
  			enum i915_cache_level cache_level,
  			u32 unused)
  {
  	struct i915_ggtt *ggtt = i915_vm_to_ggtt(vm);
-	struct gen6_ppgtt *ppgtt = vma->private;
-	u32 ggtt_offset = i915_ggtt_offset(vma) / I915_GTT_PAGE_SIZE;
+	struct gen6_ppgtt *ppgtt = vma_res->private;
+	u32 ggtt_offset = vma_res->start / I915_GTT_PAGE_SIZE;
 
  	ppgtt->pp_dir = ggtt_offset * sizeof(gen6_pte_t) << 10;
  	ppgtt->pd_addr = (gen6_pte_t __iomem *)ggtt->gsm + ggtt_offset;

@@ -285,9 +285,10 @@ static void pd_vma_bind(struct i915_address_space *vm,
  	gen6_flush_pd(ppgtt, 0, ppgtt->base.vm.total);
  }
 
-static void pd_vma_unbind(struct i915_address_space *vm, struct i915_vma *vma)
+static void pd_vma_unbind(struct i915_address_space *vm,
+			  struct i915_vma_resource *vma_res)
  {
-	struct gen6_ppgtt *ppgtt = vma->private;
+	struct gen6_ppgtt *ppgtt = vma_res->private;
  	struct i915_page_directory * const pd = ppgtt->base.pd;
  	struct i915_page_table *pt;
  	unsigned int pde;

drivers/gpu/drm/i915/gt/gen8_ppgtt.c +19 -18

index b012c50f7ce7..c43e724afa9f 100644
@@ -453,20 +453,21 @@ gen8_ppgtt_insert_pte(struct i915_ppgtt *ppgtt,
  	return idx;
  }
 
-static void gen8_ppgtt_insert_huge(struct i915_vma *vma,
+static void gen8_ppgtt_insert_huge(struct i915_address_space *vm,
+				   struct i915_vma_resource *vma_res,
  				   struct sgt_dma *iter,
  				   enum i915_cache_level cache_level,
  				   u32 flags)
  {
  	const gen8_pte_t pte_encode = gen8_pte_encode(0, cache_level, flags);
  	unsigned int rem = sg_dma_len(iter->sg);
-	u64 start = vma->node.start;
+	u64 start = vma_res->start;
 
-	GEM_BUG_ON(!i915_vm_is_4lvl(vma->vm));
+	GEM_BUG_ON(!i915_vm_is_4lvl(vm));
 
  	do {
  		struct i915_page_directory * const pdp =
-			gen8_pdp_for_page_address(vma->vm, start);
+			gen8_pdp_for_page_address(vm, start);
  		struct i915_page_directory * const pd =
  			i915_pd_entry(pdp, __gen8_pte_index(start, 2));
  		gen8_pte_t encode = pte_encode;

@@ -475,7 +476,7 @@ static void gen8_ppgtt_insert_huge(struct i915_vma *vma,
  		gen8_pte_t *vaddr;
  		u16 index;
 
-		if (vma->page_sizes.sg & I915_GTT_PAGE_SIZE_2M &&
+		if (vma_res->bi.page_sizes.sg & I915_GTT_PAGE_SIZE_2M &&
  		    IS_ALIGNED(iter->dma, I915_GTT_PAGE_SIZE_2M) &&
  		    rem >= I915_GTT_PAGE_SIZE_2M &&
  		    !__gen8_pte_index(start, 0)) {

@@ -492,7 +493,7 @@ static void gen8_ppgtt_insert_huge(struct i915_vma *vma,
  			page_size = I915_GTT_PAGE_SIZE;
 
  			if (!index &&
-			    vma->page_sizes.sg & I915_GTT_PAGE_SIZE_64K &&
+			    vma_res->bi.page_sizes.sg & I915_GTT_PAGE_SIZE_64K &&
  			    IS_ALIGNED(iter->dma, I915_GTT_PAGE_SIZE_64K) &&
  			    (IS_ALIGNED(rem, I915_GTT_PAGE_SIZE_64K) ||
  			     rem >= (I915_PDES - index) * I915_GTT_PAGE_SIZE))

@@ -541,9 +542,9 @@ static void gen8_ppgtt_insert_huge(struct i915_vma *vma,
  		 */
  		if (maybe_64K != -1 &&
  		    (index == I915_PDES ||
-		     (i915_vm_has_scratch_64K(vma->vm) &&
-		      !iter->sg && IS_ALIGNED(vma->node.start +
-					      vma->node.size,
+		     (i915_vm_has_scratch_64K(vm) &&
+		      !iter->sg && IS_ALIGNED(vma_res->start +
+					      vma_res->node_size,
  					      I915_GTT_PAGE_SIZE_2M)))) {
  			vaddr = px_vaddr(pd);
  			vaddr[maybe_64K] |= GEN8_PDE_IPS_64K;

@@ -559,10 +560,10 @@ static void gen8_ppgtt_insert_huge(struct i915_vma *vma,
  			 * instead - which we detect as missing results during
  			 * selftests.
  			 */
-			if (I915_SELFTEST_ONLY(vma->vm->scrub_64K)) {
+			if (I915_SELFTEST_ONLY(vm->scrub_64K)) {
  				u16 i;
 
-				encode = vma->vm->scratch[0]->encode;
+				encode = vm->scratch[0]->encode;
  				vaddr = px_vaddr(i915_pt_entry(pd, maybe_64K));
 
  				for (i = 1; i < index; i += 16)

@@ -572,22 +573,22 @@ static void gen8_ppgtt_insert_huge(struct i915_vma *vma,
  			}
  		}
 
-		vma->page_sizes.gtt |= page_size;
+		vma_res->page_sizes_gtt |= page_size;
  	} while (iter->sg && sg_dma_len(iter->sg));
  }
 
  static void gen8_ppgtt_insert(struct i915_address_space *vm,
-			      struct i915_vma *vma,
+			      struct i915_vma_resource *vma_res,
  			      enum i915_cache_level cache_level,
  			      u32 flags)
  {
  	struct i915_ppgtt * const ppgtt = i915_vm_to_ppgtt(vm);
-	struct sgt_dma iter = sgt_dma(vma);
+	struct sgt_dma iter = sgt_dma(vma_res);
 
-	if (vma->page_sizes.sg > I915_GTT_PAGE_SIZE) {
-		gen8_ppgtt_insert_huge(vma, &iter, cache_level, flags);
+	if (vma_res->bi.page_sizes.sg > I915_GTT_PAGE_SIZE) {
+		gen8_ppgtt_insert_huge(vm, vma_res, &iter, cache_level, flags);
  	} else  {
-		u64 idx = vma->node.start >> GEN8_PTE_SHIFT;
+		u64 idx = vma_res->start >> GEN8_PTE_SHIFT;
 
  		do {
  			struct i915_page_directory * const pdp =

@@ -597,7 +598,7 @@ static void gen8_ppgtt_insert(struct i915_address_space *vm,
  						    cache_level, flags);
  		} while (idx);
 
-		vma->page_sizes.gtt = I915_GTT_PAGE_SIZE;
+		vma_res->page_sizes_gtt = I915_GTT_PAGE_SIZE;
  	}
  }
 

drivers/gpu/drm/i915/gt/intel_engine_cs.c +2 -2

index 352254e001b4..74aa90587061 100644
@@ -1718,8 +1718,8 @@ static void print_request_ring(struct drm_printer *m, struct i915_request *rq)
  	drm_printf(m,
  		   "[head %04x, postfix %04x, tail %04x, batch 0x%08x_%08x]:\n",
  		   rq->head, rq->postfix, rq->tail,
-		   vsnap ? upper_32_bits(vsnap->gtt_offset) : ~0u,
-		   vsnap ? lower_32_bits(vsnap->gtt_offset) : ~0u);
+		   vsnap ? upper_32_bits(vsnap->vma_resource->start) : ~0u,
+		   vsnap ? lower_32_bits(vsnap->vma_resource->start) : ~0u);
 
  	size = rq->tail - rq->head;
  	if (rq->tail < rq->head)

drivers/gpu/drm/i915/gt/intel_ggtt.c +37 -33

index 5263dda7f8d5..0137b6af0973 100644
@@ -235,7 +235,7 @@ static void gen8_ggtt_insert_page(struct i915_address_space *vm,
  }
 
  static void gen8_ggtt_insert_entries(struct i915_address_space *vm,
-				     struct i915_vma *vma,
+				     struct i915_vma_resource *vma_res,
  				     enum i915_cache_level level,
  				     u32 flags)
  {

@@ -252,10 +252,10 @@ static void gen8_ggtt_insert_entries(struct i915_address_space *vm,
  	 */
 
  	gte = (gen8_pte_t __iomem *)ggtt->gsm;
-	gte += vma->node.start / I915_GTT_PAGE_SIZE;
-	end = gte + vma->node.size / I915_GTT_PAGE_SIZE;
+	gte += vma_res->start / I915_GTT_PAGE_SIZE;
+	end = gte + vma_res->node_size / I915_GTT_PAGE_SIZE;
 
-	for_each_sgt_daddr(addr, iter, vma->pages)
+	for_each_sgt_daddr(addr, iter, vma_res->bi.pages)
  		gen8_set_pte(gte++, pte_encode | addr);
  	GEM_BUG_ON(gte > end);
 

@@ -292,7 +292,7 @@ static void gen6_ggtt_insert_page(struct i915_address_space *vm,
   * through the GMADR mapped BAR (i915->mm.gtt->gtt).
   */
  static void gen6_ggtt_insert_entries(struct i915_address_space *vm,
-				     struct i915_vma *vma,
+				     struct i915_vma_resource *vma_res,
  				     enum i915_cache_level level,
  				     u32 flags)
  {

@@ -303,10 +303,10 @@ static void gen6_ggtt_insert_entries(struct i915_address_space *vm,
  	dma_addr_t addr;
 
  	gte = (gen6_pte_t __iomem *)ggtt->gsm;
-	gte += vma->node.start / I915_GTT_PAGE_SIZE;
-	end = gte + vma->node.size / I915_GTT_PAGE_SIZE;
+	gte += vma_res->start / I915_GTT_PAGE_SIZE;
+	end = gte + vma_res->node_size / I915_GTT_PAGE_SIZE;
 
-	for_each_sgt_daddr(addr, iter, vma->pages)
+	for_each_sgt_daddr(addr, iter, vma_res->bi.pages)
  		iowrite32(vm->pte_encode(addr, level, flags), gte++);
  	GEM_BUG_ON(gte > end);
 

@@ -389,7 +389,7 @@ static void bxt_vtd_ggtt_insert_page__BKL(struct i915_address_space *vm,
 
  struct insert_entries {
  	struct i915_address_space *vm;
-	struct i915_vma *vma;
+	struct i915_vma_resource *vma_res;
  	enum i915_cache_level level;
  	u32 flags;
  };

@@ -398,18 +398,18 @@ static int bxt_vtd_ggtt_insert_entries__cb(void *_arg)
  {
  	struct insert_entries *arg = _arg;
 
-	gen8_ggtt_insert_entries(arg->vm, arg->vma, arg->level, arg->flags);
+	gen8_ggtt_insert_entries(arg->vm, arg->vma_res, arg->level, arg->flags);
  	bxt_vtd_ggtt_wa(arg->vm);
 
  	return 0;
  }
 
  static void bxt_vtd_ggtt_insert_entries__BKL(struct i915_address_space *vm,
-					     struct i915_vma *vma,
+					     struct i915_vma_resource *vma_res,
  					     enum i915_cache_level level,
  					     u32 flags)
  {
-	struct insert_entries arg = { vm, vma, level, flags };
+	struct insert_entries arg = { vm, vma_res, level, flags };
 
  	stop_machine(bxt_vtd_ggtt_insert_entries__cb, &arg, NULL);
  }

@@ -448,14 +448,14 @@ static void i915_ggtt_insert_page(struct i915_address_space *vm,
  }
 
  static void i915_ggtt_insert_entries(struct i915_address_space *vm,
-				     struct i915_vma *vma,
+				     struct i915_vma_resource *vma_res,
  				     enum i915_cache_level cache_level,
  				     u32 unused)
  {
  	unsigned int flags = (cache_level == I915_CACHE_NONE) ?
  		AGP_USER_MEMORY : AGP_USER_CACHED_MEMORY;
 
-	intel_gtt_insert_sg_entries(vma->pages, vma->node.start >> PAGE_SHIFT,
+	intel_gtt_insert_sg_entries(vma_res->bi.pages, vma_res->start >> PAGE_SHIFT,
  				    flags);
  }
 

@@ -467,30 +467,32 @@ static void i915_ggtt_clear_range(struct i915_address_space *vm,
 
  static void ggtt_bind_vma(struct i915_address_space *vm,
  			  struct i915_vm_pt_stash *stash,
-			  struct i915_vma *vma,
+			  struct i915_vma_resource *vma_res,
  			  enum i915_cache_level cache_level,
  			  u32 flags)
  {
-	struct drm_i915_gem_object *obj = vma->obj;
  	u32 pte_flags;
 
-	if (i915_vma_is_bound(vma, ~flags & I915_VMA_BIND_MASK))
+	if (vma_res->bound_flags & (~flags & I915_VMA_BIND_MASK))
  		return;
 
+	vma_res->bound_flags |= flags;
+
  	/* Applicable to VLV (gen8+ do not support RO in the GGTT) */
  	pte_flags = 0;
-	if (i915_gem_object_is_readonly(obj))
+	if (vma_res->bi.readonly)
  		pte_flags |= PTE_READ_ONLY;
-	if (i915_gem_object_is_lmem(obj))
+	if (vma_res->bi.lmem)
  		pte_flags |= PTE_LM;
 
-	vm->insert_entries(vm, vma, cache_level, pte_flags);
-	vma->page_sizes.gtt = I915_GTT_PAGE_SIZE;
+	vm->insert_entries(vm, vma_res, cache_level, pte_flags);
+	vma_res->page_sizes_gtt = I915_GTT_PAGE_SIZE;
  }
 
-static void ggtt_unbind_vma(struct i915_address_space *vm, struct i915_vma *vma)
+static void ggtt_unbind_vma(struct i915_address_space *vm,
+			    struct i915_vma_resource *vma_res)
  {
-	vm->clear_range(vm, vma->node.start, vma->size);
+	vm->clear_range(vm, vma_res->start, vma_res->vma_size);
  }
 
  static int ggtt_reserve_guc_top(struct i915_ggtt *ggtt)

@@ -623,7 +625,7 @@ static int init_ggtt(struct i915_ggtt *ggtt)
 
  static void aliasing_gtt_bind_vma(struct i915_address_space *vm,
  				  struct i915_vm_pt_stash *stash,
-				  struct i915_vma *vma,
+				  struct i915_vma_resource *vma_res,
  				  enum i915_cache_level cache_level,
  				  u32 flags)
  {

@@ -631,25 +633,27 @@ static void aliasing_gtt_bind_vma(struct i915_address_space *vm,
 
  	/* Currently applicable only to VLV */
  	pte_flags = 0;
-	if (i915_gem_object_is_readonly(vma->obj))
+	if (vma_res->bi.readonly)
  		pte_flags |= PTE_READ_ONLY;
 
  	if (flags & I915_VMA_LOCAL_BIND)
  		ppgtt_bind_vma(&i915_vm_to_ggtt(vm)->alias->vm,
-			       stash, vma, cache_level, flags);
+			       stash, vma_res, cache_level, flags);
 
  	if (flags & I915_VMA_GLOBAL_BIND)
-		vm->insert_entries(vm, vma, cache_level, pte_flags);
+		vm->insert_entries(vm, vma_res, cache_level, pte_flags);
+
+	vma_res->bound_flags |= flags;
  }
 
  static void aliasing_gtt_unbind_vma(struct i915_address_space *vm,
-				    struct i915_vma *vma)
+				    struct i915_vma_resource *vma_res)
  {
-	if (i915_vma_is_bound(vma, I915_VMA_GLOBAL_BIND))
-		vm->clear_range(vm, vma->node.start, vma->size);
+	if (vma_res->bound_flags & I915_VMA_GLOBAL_BIND)
+		vm->clear_range(vm, vma_res->start, vma_res->vma_size);
 
-	if (i915_vma_is_bound(vma, I915_VMA_LOCAL_BIND))
-		ppgtt_unbind_vma(&i915_vm_to_ggtt(vm)->alias->vm, vma);
+	if (vma_res->bound_flags & I915_VMA_LOCAL_BIND)
+		ppgtt_unbind_vma(&i915_vm_to_ggtt(vm)->alias->vm, vma_res);
  }
 
  static int init_aliasing_ppgtt(struct i915_ggtt *ggtt)

@@ -1280,7 +1284,7 @@ bool i915_ggtt_resume_vm(struct i915_address_space *vm)
  			atomic_read(&vma->flags) & I915_VMA_BIND_MASK;
 
  		GEM_BUG_ON(!was_bound);
-		vma->ops->bind_vma(vm, NULL, vma,
+		vma->ops->bind_vma(vm, NULL, vma->resource,
  				   obj ? obj->cache_level : 0,
  				   was_bound);
  		if (obj) { /* only used during resume => exclusive access */

drivers/gpu/drm/i915/gt/intel_gtt.h +9 -7

index 177b42b935a1..676b839d1a34 100644
@@ -27,6 +27,7 @@
 
  #include "gt/intel_reset.h"
  #include "i915_selftest.h"
+#include "i915_vma_resource.h"
  #include "i915_vma_types.h"
 
  #define I915_GFP_ALLOW_FAIL (GFP_KERNEL | __GFP_RETRY_MAYFAIL | __GFP_NOWARN)

@@ -200,7 +201,7 @@ struct i915_vma_ops {
  	/* Map an object into an address space with the given cache flags. */
  	void (*bind_vma)(struct i915_address_space *vm,
  			 struct i915_vm_pt_stash *stash,
-			 struct i915_vma *vma,
+			 struct i915_vma_resource *vma_res,
  			 enum i915_cache_level cache_level,
  			 u32 flags);
  	/*

@@ -208,7 +209,8 @@ struct i915_vma_ops {
  	 * setting the valid PTE entries to a reserved scratch page.
  	 */
  	void (*unbind_vma)(struct i915_address_space *vm,
-			   struct i915_vma *vma);
+			   struct i915_vma_resource *vma_res);
+
  };
 
  struct i915_address_space {

@@ -285,7 +287,7 @@ struct i915_address_space {
  			    enum i915_cache_level cache_level,
  			    u32 flags);
  	void (*insert_entries)(struct i915_address_space *vm,
-			       struct i915_vma *vma,
+			       struct i915_vma_resource *vma_res,
  			       enum i915_cache_level cache_level,
  			       u32 flags);
  	void (*cleanup)(struct i915_address_space *vm);

@@ -600,11 +602,11 @@ void gen6_ggtt_invalidate(struct i915_ggtt *ggtt);
 
  void ppgtt_bind_vma(struct i915_address_space *vm,
  		    struct i915_vm_pt_stash *stash,
-		    struct i915_vma *vma,
+		    struct i915_vma_resource *vma_res,
  		    enum i915_cache_level cache_level,
  		    u32 flags);
  void ppgtt_unbind_vma(struct i915_address_space *vm,
-		      struct i915_vma *vma);
+		      struct i915_vma_resource *vma_res);
 
  void gtt_write_workarounds(struct intel_gt *gt);
 

@@ -627,8 +629,8 @@ __vm_create_scratch_for_read_pinned(struct i915_address_space *vm, unsigned long
  static inline struct sgt_dma {
  	struct scatterlist *sg;
  	dma_addr_t dma, max;
-} sgt_dma(struct i915_vma *vma) {
-	struct scatterlist *sg = vma->pages->sgl;
+} sgt_dma(struct i915_vma_resource *vma_res) {
+	struct scatterlist *sg = vma_res->bi.pages->sgl;
  	dma_addr_t addr = sg_dma_address(sg);
 
  	return (struct sgt_dma){ sg, addr, addr + sg_dma_len(sg) };

drivers/gpu/drm/i915/gt/intel_ppgtt.c +7 -6

index 083b3090c69c..48e6e2f87700 100644
@@ -179,32 +179,34 @@ struct i915_ppgtt *i915_ppgtt_create(struct intel_gt *gt,
 
  void ppgtt_bind_vma(struct i915_address_space *vm,
  		    struct i915_vm_pt_stash *stash,
-		    struct i915_vma *vma,
+		    struct i915_vma_resource *vma_res,
  		    enum i915_cache_level cache_level,
  		    u32 flags)
  {
  	u32 pte_flags;
 
-	if (!test_bit(I915_VMA_ALLOC_BIT, __i915_vma_flags(vma))) {
-		vm->allocate_va_range(vm, stash, vma->node.start, vma->size);
-		set_bit(I915_VMA_ALLOC_BIT, __i915_vma_flags(vma));
+	if (!vma_res->allocated) {
+		vm->allocate_va_range(vm, stash, vma_res->start,
+				      vma_res->vma_size);
+		vma_res->allocated = true;
  	}
 
  	/* Applicable to VLV, and gen8+ */
  	pte_flags = 0;
-	if (i915_gem_object_is_readonly(vma->obj))
+	if (vma_res->bi.readonly)
  		pte_flags |= PTE_READ_ONLY;
-	if (i915_gem_object_is_lmem(vma->obj))
+	if (vma_res->bi.lmem)
  		pte_flags |= PTE_LM;
 

drivers/gpu/drm/i915/gt/intel_ppgtt.c +2 -1

-		vm->clear_range(vm, vma->node.start, vma->size);
+	if (vma_res->allocated)
+		vm->clear_range(vm, vma_res->start, vma_res->vma_size);
  }
 
  static unsigned long pd_count(u64 size, int shift)

drivers/gpu/drm/i915/gt/uc/intel_uc_fw.c +6 -7

index a5af05bde6f2..777fc6f0ceff 100644
@@ -448,20 +448,19 @@ static void uc_fw_bind_ggtt(struct intel_uc_fw *uc_fw)
  {
  	struct drm_i915_gem_object *obj = uc_fw->obj;
  	struct i915_ggtt *ggtt = __uc_fw_to_gt(uc_fw)->ggtt;
-	struct i915_vma *dummy = &uc_fw->dummy;
+	struct i915_vma_resource *dummy = &uc_fw->dummy;
  	u32 pte_flags = 0;
 
-	dummy->node.start = uc_fw_ggtt_offset(uc_fw);
-	dummy->node.size = obj->base.size;
-	dummy->pages = obj->mm.pages;
-	dummy->vm = &ggtt->vm;
+	dummy->start = uc_fw_ggtt_offset(uc_fw);
+	dummy->node_size = obj->base.size;
+	dummy->bi.pages = obj->mm.pages;
 
  	GEM_BUG_ON(!i915_gem_object_has_pinned_pages(obj));
-	GEM_BUG_ON(dummy->node.size > ggtt->uc_fw.size);
+	GEM_BUG_ON(dummy->node_size > ggtt->uc_fw.size);
 
  	/* uc_fw->obj cache domains were not controlled across suspend */
  	if (i915_gem_object_has_struct_page(obj))
-		drm_clflush_sg(dummy->pages);
+		drm_clflush_sg(dummy->bi.pages);
 
  	if (i915_gem_object_is_lmem(obj))
  		pte_flags |= PTE_LM;

drivers/gpu/drm/i915/gt/uc/intel_uc_fw.h +1 -1

index d9d1dc0b4cbb..3229018877d3 100644
@@ -85,7 +85,7 @@ struct intel_uc_fw {
  	 * threaded as it done during driver load (inherently single threaded)
  	 * or during a GT reset (mutex guarantees single threaded).
  	 */
-	struct i915_vma dummy;
+	struct i915_vma_resource dummy;
  	struct i915_vma *rsa_data;
 
  	/*

drivers/gpu/drm/i915/i915_debugfs.c +2 -1

index e0e052cdf8b8..f7d1feba5aa4 100644
@@ -170,7 +170,8 @@ i915_debugfs_describe_obj(struct seq_file *m, struct drm_i915_gem_object *obj)
  		seq_printf(m, " (%s offset: %08llx, size: %08llx, pages: %s",
  			   stringify_vma_type(vma),
  			   vma->node.start, vma->node.size,
-			   stringify_page_sizes(vma->page_sizes.gtt, NULL, 0));
+			   stringify_page_sizes(vma->resource->page_sizes_gtt,
+						NULL, 0));
  		if (i915_vma_is_ggtt(vma) || i915_vma_is_dpt(vma)) {
  			switch (vma->ggtt_view.type) {
  			case I915_GGTT_VIEW_NORMAL:

drivers/gpu/drm/i915/i915_gpu_error.c +3 -3

index 5ae812d60abe..1af54ff374f9 100644
@@ -1040,9 +1040,9 @@ i915_vma_coredump_create(const struct intel_gt *gt,
  	strcpy(dst->name, vsnap->name);
  	dst->next = NULL;
 
-	dst->gtt_offset = vsnap->gtt_offset;
-	dst->gtt_size = vsnap->gtt_size;
-	dst->gtt_page_sizes = vsnap->page_sizes;
+	dst->gtt_offset = vsnap->vma_resource->start;
+	dst->gtt_size = vsnap->vma_resource->node_size;
+	dst->gtt_page_sizes = vsnap->vma_resource->page_sizes_gtt;
  	dst->unused = 0;
 
  	ret = -EINVAL;

drivers/gpu/drm/i915/i915_vma.c +20 -4

index 7097c5016431..1d4e448d22d9 100644
@@ -298,7 +298,7 @@ static void __vma_bind(struct dma_fence_work *work)
  	struct i915_vma *vma = vw->vma;
 
  	vma->ops->bind_vma(vw->vm, &vw->stash,
-			   vma, vw->cache_level, vw->flags);
+			   vma->resource, vw->cache_level, vw->flags);
  }
 
  static void __vma_release(struct dma_fence_work *work)

@@ -375,6 +375,21 @@ static int i915_vma_verify_bind_complete(struct i915_vma *vma)
  #define i915_vma_verify_bind_complete(_vma) 0
  #endif
 
+I915_SELFTEST_EXPORT void
+i915_vma_resource_init_from_vma(struct i915_vma_resource *vma_res,
+				struct i915_vma *vma)
+{
+	struct drm_i915_gem_object *obj = vma->obj;
+
+	i915_vma_resource_init(vma_res, vma->pages, &vma->page_sizes,
+			       i915_gem_object_is_readonly(obj),
+			       i915_gem_object_is_lmem(obj),
+			       vma->private,
+			       vma->node.start,
+			       vma->node.size,
+			       vma->size);
+}
+
  /**
   * i915_vma_bind - Sets up PTEs for an VMA in it's corresponding address space.
   * @vma: VMA to map

@@ -432,7 +447,7 @@ int i915_vma_bind(struct i915_vma *vma,
  		GEM_WARN_ON(!vma_flags);
  		kfree(vma_res);
  	} else {
-		i915_vma_resource_init(vma_res);
+		i915_vma_resource_init_from_vma(vma_res, vma);
  		vma->resource = vma_res;
  	}
  	trace_i915_vma_bind(vma, bind_flags);

@@ -472,7 +487,8 @@ int i915_vma_bind(struct i915_vma *vma,
  			if (ret)
  				return ret;
  		}
-		vma->ops->bind_vma(vma->vm, NULL, vma, cache_level, bind_flags);
+		vma->ops->bind_vma(vma->vm, NULL, vma->resource, cache_level,
+				   bind_flags);
  	}
 
  	atomic_or(bind_flags, &vma->flags);

@@ -1778,7 +1794,7 @@ void __i915_vma_evict(struct i915_vma *vma)
 
  	if (likely(atomic_read(&vma->vm->open))) {
  		trace_i915_vma_unbind(vma);
-		vma->ops->unbind_vma(vma->vm, vma);
+		vma->ops->unbind_vma(vma->vm, vma->resource);
  	}
  	atomic_and(~(I915_VMA_BIND_MASK | I915_VMA_ERROR | I915_VMA_GGTT_WRITE),
  		   &vma->flags);

drivers/gpu/drm/i915/i915_vma.h +5 -6

index de0f3e44cdfa..1df57ec832bd 100644
@@ -339,12 +339,6 @@ void __iomem *i915_vma_pin_iomap(struct i915_vma *vma);
   */
  void i915_vma_unpin_iomap(struct i915_vma *vma);
 
-static inline struct page *i915_vma_first_page(struct i915_vma *vma)
-{
-	GEM_BUG_ON(!vma->pages);
-	return sg_page(vma->pages->sgl);
-}
-
  /**
   * i915_vma_pin_fence - pin fencing state
   * @vma: vma to pin fencing for

@@ -445,6 +439,11 @@ i915_vma_get_current_resource(struct i915_vma *vma)
  	return i915_vma_resource_get(vma->resource);
  }
 
+#if IS_ENABLED(CONFIG_DRM_I915_SELFTEST)
+void i915_vma_resource_init_from_vma(struct i915_vma_resource *vma_res,
+				     struct i915_vma *vma);
+#endif
+
  void i915_vma_module_exit(void);
  int i915_vma_module_init(void);
 

drivers/gpu/drm/i915/i915_vma_resource.c +3 -6

index 833e987bed2a..c86db89ab5d2 100644
@@ -23,15 +23,12 @@ static struct dma_fence_ops unbind_fence_ops = {
  };
 
  /**
- * i915_vma_resource_init - Initialize a vma resource.
+ * __i915_vma_resource_init - Initialize a vma resource.
   * @vma_res: The vma resource to initialize
   *
- * Initializes a vma resource allocated using i915_vma_resource_alloc().
- * The reason for having separate allocate and initialize function is that
- * initialization may need to be performed from under a lock where
- * allocation is not allowed.
+ * Initializes the private members of a vma resource.
   */
-void i915_vma_resource_init(struct i915_vma_resource *vma_res)
+void __i915_vma_resource_init(struct i915_vma_resource *vma_res)
  {
  	spin_lock_init(&vma_res->lock);
  	dma_fence_init(&vma_res->unbind_fence, &unbind_fence_ops,

drivers/gpu/drm/i915/i915_vma_resource.h +39 -0

index 34744da23072..9872de58268b 100644
@@ -9,6 +9,25 @@
  #include <linux/dma-fence.h>
  #include <linux/refcount.h>
 
+#include "i915_gem.h"
+
+struct i915_page_sizes {
+	/**
+	 * The sg mask of the pages sg_table. i.e the mask of
+	 * the lengths for each sg entry.
+	 */
+	unsigned int phys;
+
+	/**
+	 * The gtt page sizes we are allowed to use given the
+	 * sg mask and the supported page sizes. This will
+	 * express the smallest unit we can use for the whole
+	 * object, as well as the larger sizes we may be able
+	 * to use opportunistically.
+	 */
+	unsigned int sg;
+};
+
  /**
   * struct i915_vma_resource - Snapshotted unbind information.
   * @unbind_fence: Fence to mark unbinding complete. Note that this fence

@@ -20,6 +39,13 @@
   * @hold_count: Number of holders blocking the fence from finishing.
   * The vma itself is keeping a hold, which is released when unbind
   * is scheduled.
+ * @private: Bind backend private info.
+ * @start: Offset into the address space of bind range start.
+ * @node_size: Size of the allocated range manager node.
+ * @vma_size: Bind size.
+ * @page_sizes_gtt: Resulting page sizes from the bind operation.
+ * @bound_flags: Flags indicating binding status.
+ * @allocated: Backend private data. TODO: Should move into @private.
   *
   * The lifetime of a struct i915_vma_resource is from a binding request to
   * the actual possible asynchronous unbind has completed.

@@ -29,6 +55,32 @@ struct i915_vma_resource {
  	/* See above for description of the lock. */
  	spinlock_t lock;
  	refcount_t hold_count;
+
+	/**
+	 * struct i915_vma_bindinfo - Information needed for async bind
+	 * only but that can be dropped after the bind has taken place.
+	 * Consider making this a separate argument to the bind_vma
+	 * op, coalescing with other arguments like vm, stash, cache_level
+	 * and flags
+	 * @pages: The pages sg-table.
+	 * @page_sizes: Page sizes of the pages.
+	 * @readonly: Whether the vma should be bound read-only.
+	 * @lmem: Whether the vma points to lmem.
+	 */
+	struct i915_vma_bindinfo {

drivers/gpu/drm/i915/i915_vma_resource.h +47 -3

+	u32 page_sizes_gtt;
+	u32 bound_flags;
+	bool allocated:1;
  };
 
  bool i915_vma_resource_hold(struct i915_vma_resource *vma_res,

@@ -41,6 +93,8 @@ struct i915_vma_resource *i915_vma_resource_alloc(void);
 
  struct dma_fence *i915_vma_resource_unbind(struct i915_vma_resource *vma_res);
 
+void __i915_vma_resource_init(struct i915_vma_resource *vma_res);
+
  /**
   * i915_vma_resource_get - Take a reference on a vma resource
   * @vma_res: The vma resource on which to take a reference.

@@ -63,8 +117,47 @@ static inline void i915_vma_resource_put(struct i915_vma_resource *vma_res)
  	dma_fence_put(&vma_res->unbind_fence);
  }
 
-#if IS_ENABLED(CONFIG_DRM_I915_SELFTEST)
-void i915_vma_resource_init(struct i915_vma_resource *vma_res);
-#endif
+/**
+ * i915_vma_resource_init - Initialize a vma resource.
+ * @vma_res: The vma resource to initialize
+ * @pages: The pages sg-table.
+ * @page_sizes: Page sizes of the pages.
+ * @readonly: Whether the vma should be bound read-only.
+ * @lmem: Whether the vma points to lmem.
+ * @private: Bind backend private info.
+ * @start: Offset into the address space of bind range start.
+ * @node_size: Size of the allocated range manager node.
+ * @size: Bind size.
+ *
+ * Initializes a vma resource allocated using i915_vma_resource_alloc().
+ * The reason for having separate allocate and initialize function is that
+ * initialization may need to be performed from under a lock where
+ * allocation is not allowed.
+ */
+static inline void i915_vma_resource_init(struct i915_vma_resource *vma_res,
+					  struct sg_table *pages,
+					  const struct i915_page_sizes *page_sizes,
+					  bool readonly,
+					  bool lmem,
+					  void *private,
+					  unsigned long start,
+					  unsigned long node_size,
+					  unsigned long size)
+{
+	__i915_vma_resource_init(vma_res);
+	vma_res->bi.pages = pages;
+	vma_res->bi.page_sizes = *page_sizes;
+	vma_res->bi.readonly = readonly;
+	vma_res->bi.lmem = lmem;
+	vma_res->private = private;
+	vma_res->start = start;
+	vma_res->node_size = node_size;
+	vma_res->vma_size = size;
+}
+
+static inline void i915_vma_resource_fini(struct i915_vma_resource *vma_res)
+{
+	GEM_BUG_ON(refcount_read(&vma_res->hold_count) != 1);
+}
 
  #endif

drivers/gpu/drm/i915/i915_vma_snapshot.c +0 -4

index f7333c7a2f5e..69f62c1ca967 100644
@@ -24,11 +24,7 @@ void i915_vma_snapshot_init(struct i915_vma_snapshot *vsnap,
  		assert_object_held(vma->obj);
 
  	vsnap->name = name;
-	vsnap->size = vma->size;
  	vsnap->obj_size = vma->obj->base.size;
-	vsnap->gtt_offset = vma->node.start;
-	vsnap->gtt_size = vma->node.size;
-	vsnap->page_sizes = vma->page_sizes.gtt;
  	vsnap->pages = vma->pages;
  	vsnap->pages_rsgt = NULL;
  	vsnap->mr = NULL;

drivers/gpu/drm/i915/i915_vma_snapshot.h +0 -8

index e74588dd676b..1b08ce9f8576 100644
@@ -23,31 +23,23 @@ struct sg_table;
 
  /**
   * struct i915_vma_snapshot - Snapshot of vma metadata.
- * @size: The vma size in bytes.
   * @obj_size: The size of the underlying object in bytes.
- * @gtt_offset: The gtt offset the vma is bound to.
- * @gtt_size: The size in bytes allocated for the vma in the GTT.
   * @pages: The struct sg_table pointing to the pages bound.
   * @pages_rsgt: The refcounted sg_table holding the reference for @pages if any.
   * @mr: The memory region pointed for the pages bound.
   * @kref: Reference for this structure.
   * @vma_resource: Pointer to the vma resource representing the vma binding.
- * @page_sizes: The vma GTT page sizes information.
   * @onstack: Whether the structure shouldn't be freed on final put.
   * @present: Whether the structure is present and initialized.
   */
  struct i915_vma_snapshot {
  	const char *name;
-	size_t size;
  	size_t obj_size;
-	size_t gtt_offset;
-	size_t gtt_size;
  	struct sg_table *pages;
  	struct i915_refct_sgt *pages_rsgt;
  	struct intel_memory_region *mr;
  	struct kref kref;
  	struct i915_vma_resource *vma_resource;
-	u32 page_sizes;
  	bool onstack:1;
  	bool present:1;
  };

drivers/gpu/drm/i915/selftests/i915_gem_gtt.c +44 -20

index 54be880e55c3..70b5c47890b9 100644
@@ -239,11 +239,11 @@ static int lowlevel_hole(struct i915_address_space *vm,
  			 unsigned long end_time)
  {
  	I915_RND_STATE(seed_prng);
-	struct i915_vma *mock_vma;
+	struct i915_vma_resource *mock_vma_res;
  	unsigned int size;
 
-	mock_vma = kzalloc(sizeof(*mock_vma), GFP_KERNEL);
-	if (!mock_vma)
+	mock_vma_res = kzalloc(sizeof(*mock_vma_res), GFP_KERNEL);
+	if (!mock_vma_res)
  		return -ENOMEM;
 
  	/* Keep creating larger objects until one cannot fit into the hole */

@@ -269,7 +269,7 @@ static int lowlevel_hole(struct i915_address_space *vm,
  				break;
  		} while (count >>= 1);
  		if (!count) {
-			kfree(mock_vma);
+			kfree(mock_vma_res);
  			return -ENOMEM;
  		}
  		GEM_BUG_ON(!order);

@@ -343,12 +343,12 @@ static int lowlevel_hole(struct i915_address_space *vm,
  					break;
  			}
 
-			mock_vma->pages = obj->mm.pages;
-			mock_vma->node.size = BIT_ULL(size);
-			mock_vma->node.start = addr;
+			mock_vma_res->bi.pages = obj->mm.pages;
+			mock_vma_res->node_size = BIT_ULL(size);
+			mock_vma_res->start = addr;
 
  			with_intel_runtime_pm(vm->gt->uncore->rpm, wakeref)
-				vm->insert_entries(vm, mock_vma,
+			  vm->insert_entries(vm, mock_vma_res,
  						   I915_CACHE_NONE, 0);
  		}
  		count = n;

@@ -371,7 +371,7 @@ static int lowlevel_hole(struct i915_address_space *vm,
  		cleanup_freed_objects(vm->i915);
  	}
 
-	kfree(mock_vma);
+	kfree(mock_vma_res);
  	return 0;
  }
 

@@ -1280,6 +1280,7 @@ static void track_vma_bind(struct i915_vma *vma)
  	atomic_set(&vma->pages_count, I915_VMA_PAGES_ACTIVE);
  	__i915_gem_object_pin_pages(obj);
  	vma->pages = obj->mm.pages;
+	vma->resource->bi.pages = vma->pages;
 
  	mutex_lock(&vma->vm->mutex);
  	list_add_tail(&vma->vm_link, &vma->vm->bound_list);

@@ -1354,7 +1355,7 @@ static int reserve_gtt_with_resource(struct i915_vma *vma, u64 offset)
  				   obj->cache_level,
  				   0);
  	if (!err) {
-		i915_vma_resource_init(vma_res);
+		i915_vma_resource_init_from_vma(vma_res, vma);
  		vma->resource = vma_res;
  	} else {
  		kfree(vma_res);

@@ -1533,7 +1534,7 @@ static int insert_gtt_with_resource(struct i915_vma *vma)
  	err = i915_gem_gtt_insert(vm, &vma->node, obj->base.size, 0,
  				  obj->cache_level, 0, vm->total, 0);
  	if (!err) {
-		i915_vma_resource_init(vma_res);
+		i915_vma_resource_init_from_vma(vma_res, vma);
  		vma->resource = vma_res;
  	} else {
  		kfree(vma_res);

@@ -1958,6 +1959,7 @@ static int igt_cs_tlb(void *arg)
  			struct i915_vm_pt_stash stash = {};
  			struct i915_request *rq;
  			struct i915_gem_ww_ctx ww;
+			struct i915_vma_resource *vma_res;
  			u64 offset;
 
  			offset = igt_random_offset(&prng,

@@ -1978,6 +1980,13 @@ static int igt_cs_tlb(void *arg)
  			if (err)
  				goto end;
 
+			vma_res = i915_vma_resource_alloc();
+			if (IS_ERR(vma_res)) {
+				i915_vma_put_pages(vma);
+				err = PTR_ERR(vma_res);
+				goto end;
+			}
+
  			i915_gem_ww_ctx_init(&ww, false);
  retry:
  			err = i915_vm_lock_objects(vm, &ww);

@@ -1999,33 +2008,41 @@ static int igt_cs_tlb(void *arg)
  					goto retry;
  			}
  			i915_gem_ww_ctx_fini(&ww);
-			if (err)
+			if (err) {
+				kfree(vma_res);
  				goto end;
+			}
 
+			i915_vma_resource_init_from_vma(vma_res, vma);
  			/* Prime the TLB with the dummy pages */
  			for (i = 0; i < count; i++) {
-				vma->node.start = offset + i * PAGE_SIZE;
-				vm->insert_entries(vm, vma, I915_CACHE_NONE, 0);
+				vma_res->start = offset + i * PAGE_SIZE;
+				vm->insert_entries(vm, vma_res, I915_CACHE_NONE,
+						   0);
 
-				rq = submit_batch(ce, vma->node.start);
+				rq = submit_batch(ce, vma_res->start);
  				if (IS_ERR(rq)) {
  					err = PTR_ERR(rq);
+					i915_vma_resource_fini(vma_res);
+					kfree(vma_res);
  					goto end;
  				}
  				i915_request_put(rq);
  			}
-
+			i915_vma_resource_fini(vma_res);
  			i915_vma_put_pages(vma);
 
  			err = context_sync(ce);
  			if (err) {
  				pr_err("%s: dummy setup timed out\n",
  				       ce->engine->name);
+				kfree(vma_res);
  				goto end;
  			}
 
  			vma = i915_vma_instance(act, vm, NULL);
  			if (IS_ERR(vma)) {
+				kfree(vma_res);
  				err = PTR_ERR(vma);
  				goto end;
  			}

@@ -2033,19 +2050,22 @@ static int igt_cs_tlb(void *arg)
  			i915_gem_object_lock(act, NULL);
  			err = i915_vma_get_pages(vma);
  			i915_gem_object_unlock(act);
-			if (err)
+			if (err) {
+				kfree(vma_res);
  				goto end;
+			}
 
+			i915_vma_resource_init_from_vma(vma_res, vma);
  			/* Replace the TLB with target batches */
  			for (i = 0; i < count; i++) {
  				struct i915_request *rq;
  				u32 *cs = batch + i * 64 / sizeof(*cs);
  				u64 addr;
 
-				vma->node.start = offset + i * PAGE_SIZE;
-				vm->insert_entries(vm, vma, I915_CACHE_NONE, 0);
+				vma_res->start = offset + i * PAGE_SIZE;
+				vm->insert_entries(vm, vma_res, I915_CACHE_NONE, 0);
 
-				addr = vma->node.start + i * 64;
+				addr = vma_res->start + i * 64;
  				cs[4] = MI_NOOP;
  				cs[6] = lower_32_bits(addr);
  				cs[7] = upper_32_bits(addr);

@@ -2054,6 +2074,8 @@ static int igt_cs_tlb(void *arg)
  				rq = submit_batch(ce, addr);
  				if (IS_ERR(rq)) {
  					err = PTR_ERR(rq);
+					i915_vma_resource_fini(vma_res);
+					kfree(vma_res);
  					goto end;
  				}
 

@@ -2070,6 +2092,8 @@ static int igt_cs_tlb(void *arg)
  			}
  			end_spin(batch, count - 1);
 
+			i915_vma_resource_fini(vma_res);
+			kfree(vma_res);
  			i915_vma_put_pages(vma);
 
  			err = context_sync(ce);

drivers/gpu/drm/i915/selftests/mock_gtt.c +6 -6

index 1802baf80a17..d40519e3ca38 100644
@@ -33,23 +33,23 @@ static void mock_insert_page(struct i915_address_space *vm,
  }
 
  static void mock_insert_entries(struct i915_address_space *vm,
-				struct i915_vma *vma,
+				struct i915_vma_resource *vma_res,
  				enum i915_cache_level level, u32 flags)
  {
  }
 
  static void mock_bind_ppgtt(struct i915_address_space *vm,
  			    struct i915_vm_pt_stash *stash,
-			    struct i915_vma *vma,
+			    struct i915_vma_resource *vma_res,
  			    enum i915_cache_level cache_level,
  			    u32 flags)
  {
  	GEM_BUG_ON(flags & I915_VMA_GLOBAL_BIND);
-	set_bit(I915_VMA_LOCAL_BIND_BIT, __i915_vma_flags(vma));
+	vma_res->bound_flags |= flags;
  }
 
  static void mock_unbind_ppgtt(struct i915_address_space *vm,
-			      struct i915_vma *vma)
+			      struct i915_vma_resource *vma_res)
  {
  }
 

@@ -93,14 +93,14 @@ struct i915_ppgtt *mock_ppgtt(struct drm_i915_private *i915, const char *name)
 
  static void mock_bind_ggtt(struct i915_address_space *vm,
  			   struct i915_vm_pt_stash *stash,
-			   struct i915_vma *vma,
+			   struct i915_vma_resource *vma_res,
  			   enum i915_cache_level cache_level,
  			   u32 flags)
  {
  }
 
  static void mock_unbind_ggtt(struct i915_address_space *vm,
-			     struct i915_vma *vma)
+			     struct i915_vma_resource *vma_res)
  {
  }
 

A pin-count is already held by vma->pages so taking an additional pin during async binds is not necessary.

When we introduce async unbinding we have other means of keeping the object pages alive.

Signed-off-by Thomas Hellström <[email protected]>

Implement async (non-blocking) unbinding by not syncing the vma before calling unbind on the vma_resource.
Add the resulting unbind fence to the object's dma_resv from where it is picked up by the ttm migration code.
Ideally these unbind fences should be coalesced with the migration blit fence to avoid stalling the migration blit waiting for unbind, as they can certainly go on in parallel, but since we don't yet have a reasonable data structure to use to coalesce fences and attach the resulting fence to a timeline, we defer that for now.

Note that with async unbinding, even while the unbind waits for the preceding bind to complete before unbinding, the vma itself might have been destroyed in the process, clearing the vma pages. Therefore we can only allow async unbinding if we have a refcounted sg-list and keep a refcount on that for the vma resource pages to stay intact until binding occurs. If this condition is not met, a request for an async unbind is diverted to a sync unbind.

v2:
- Use a separate kmem_cache for vma resources for now to isolate their memory allocation and aid debugging.
- Move the check for vm closed to the actual unbinding thread. Regardless of whether the vm is closed, we need the unbind fence to properly wait for capture.
- Clear vma_res::vm on unbind and update its documentation. v4:
- Take cache coloring into account when searching for vma resources pending unbind. (Matthew Auld)
v5:
- Fix timeout and error check in i915_vma_resource_bind_dep_await().
- Avoid taking a reference on the object for async binding if async unbind capable.
- Fix braces around a single-line if statement.

Signed-off-by Thomas Hellström <[email protected]>

drivers/gpu/drm/i915/i915_vma.c +19 -1

@@ -434,12 +439,30 @@ int i915_vma_bind(struct i915_vma *vma,
 
  	bind_flags &= ~vma_flags;
  	if (bind_flags == 0) {
-		kfree(vma_res);
+		i915_vma_resource_free(vma_res);
  		return 0;
  	}
 
  	GEM_BUG_ON(!atomic_read(&vma->pages_count));
 
+	/* Wait for or await async unbinds touching our range */
+	if (work && bind_flags & vma->vm->bind_async_flags)
+		ret = i915_vma_resource_bind_dep_await(vma->vm,
+						       &work->base.chain,
+						       vma->node.start,
+						       vma->node.size,
+						       true,
+						       GFP_NOWAIT |
+						       __GFP_RETRY_MAYFAIL |
+						       __GFP_NOWARN);
+	else
+		ret = i915_vma_resource_bind_dep_sync(vma->vm, vma->node.start,
+						      vma->node.size, true);
+	if (ret) {
+		i915_vma_resource_free(vma_res);
+		return ret;
+	}
+
  	if (vma->resource || !vma_res) {
  		/* Rebinding with an additional I915_VMA_*_BIND */
  		GEM_WARN_ON(!vma_flags);

Quoted 46 lines · Thomas Hellström

Implement async (non-blocking) unbinding by not syncing the vma before
calling unbind on the vma_resource.
Add the resulting unbind fence to the object's dma_resv from where it is
picked up by the ttm migration code.
Ideally these unbind fences should be coalesced with the migration blit
fence to avoid stalling the migration blit waiting for unbind, as they
can certainly go on in parallel, but since we don't yet have a reasonable data structure to use to coalesce fences and attach the resulting fence to a timeline, we defer that for now.

Note that with async unbinding, even while the unbind waits for the preceding bind to complete before unbinding, the vma itself might have been
destroyed in the process, clearing the vma pages. Therefore we can only allow async unbinding if we have a refcounted sg-list and keep a
refcount on that for the vma resource pages to stay intact until binding occurs. If this condition is not met, a request for an async
unbind is diverted to a sync unbind.

v2:
- Use a separate kmem_cache for vma resources for now to isolate their
   memory allocation and aid debugging.
- Move the check for vm closed to the actual unbinding thread. Regardless
   of whether the vm is closed, we need the unbind fence to properly wait
   for capture.
- Clear vma_res::vm on unbind and update its documentation. v4:
- Take cache coloring into account when searching for vma resources pending unbind. (Matthew Auld)
v5:
- Fix timeout and error check in i915_vma_resource_bind_dep_await().
- Avoid taking a reference on the object for async binding if async unbind capable.
- Fix braces around a single-line if statement.

Signed-off-by Thomas Hellström <[email protected]>

<snip>

Quoted 50 lines

(quoted diff) +0 -0

@@ -434,12 +439,30 @@ int i915_vma_bind(struct i915_vma *vma,

        bind_flags &= ~vma_flags;
        if (bind_flags == 0) {
-               kfree(vma_res);
+               i915_vma_resource_free(vma_res); return 0;
        }

        GEM_BUG_ON(!atomic_read(&vma->pages_count));

+       /* Wait for or await async unbinds touching our range */ +       if (work && bind_flags & vma->vm->bind_async_flags) +               ret = i915_vma_resource_bind_dep_await(vma->vm, +                                                      &work-

Quoted 1 line

base.chain,

+                                                      vma-

Quoted 1 line

node.start,

+                                                      vma-

Quoted 1 line

node.size,

+                                                      true, +                                                      GFP_NOWAIT | +
__GFP_RETRY_MAYFAIL |
+
__GFP_NOWARN);
+       else
+               ret = i915_vma_resource_bind_dep_sync(vma->vm, vma-

Quoted 1 line

node.start,

+                                                     vma-

Quoted 1 line

node.size, true);

+       if (ret) {
+               i915_vma_resource_free(vma_res);
+               return ret;
+       }
+
        if (vma->resource || !vma_res) {
                /* Rebinding with an additional I915_VMA_*_BIND */ GEM_WARN_ON(!vma_flags);

drivers/gpu/drm/i915/i915_vma.c +0 -0

@@ -452,9 +475,11 @@ int i915_vma_bind(struct i915_vma *vma,
         if (work && bind_flags & vma->vm->bind_async_flags) {
                 struct dma_fence *prev;

-               work->vma = vma;
+               work->vma_res = i915_vma_resource_get(vma-

Quoted 1 line

resource);

                work->cache_level = cache_level; work->flags = bind_flags;
+               if (vma->obj->mm.rsgt)
+                       work->rsgt = i915_refct_sgt_get(vma->obj-

Quoted 1 line

Quoted 1 line

mm.rsgt);

Hmmm, at a glance I would have expected this to use the vma->pages. I think with the GGTT the vma will often create its own sg layout which !=
obj->mm.sgt. IIUC the async unbind will still call vma_unbind_pages which might nuke the vma sgt? Or is something else going on here?

pages != &rsgt->table, because the former might otherwise be nuked

Implement async (non-blocking) unbinding by not syncing the vma before calling unbind on the vma_resource.
Add the resulting unbind fence to the object's dma_resv from where it is picked up by the ttm migration code.
Ideally these unbind fences should be coalesced with the migration blit fence to avoid stalling the migration blit waiting for unbind, as they can certainly go on in parallel, but since we don't yet have a reasonable data structure to use to coalesce fences and attach the resulting fence to a timeline, we defer that for now.

Note that with async unbinding, even while the unbind waits for the preceding bind to complete before unbinding, the vma itself might have been destroyed in the process, clearing the vma pages. Therefore we can only allow async unbinding if we have a refcounted sg-list and keep a refcount on that for the vma resource pages to stay intact until binding occurs. If this condition is not met, a request for an async unbind is diverted to a sync unbind.

v2:
- Use a separate kmem_cache for vma resources for now to isolate their memory allocation and aid debugging.
- Move the check for vm closed to the actual unbinding thread. Regardless of whether the vm is closed, we need the unbind fence to properly wait for capture.
- Clear vma_res::vm on unbind and update its documentation. v4:
- Take cache coloring into account when searching for vma resources pending unbind. (Matthew Auld)
v5:
- Fix timeout and error check in i915_vma_resource_bind_dep_await().
- Avoid taking a reference on the object for async binding if async unbind capable.
- Fix braces around a single-line if statement.

Signed-off-by Thomas Hellström <[email protected]>

---

+}