drm/i915: Asynchronous vma unbinding

index 9e221ce42707..3e359de0e460 100644
@@ -1424,7 +1424,7 @@ 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)

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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);
 

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index 2949ceea9884..f7333c7a2f5e 100644
@@ -3,6 +3,7 @@
  * Copyright © 2021 Intel Corporation
  */
 
+#include "i915_vma_resource.h"
 #include "i915_vma_snapshot.h"
 #include "i915_vma_types.h"
 #include "i915_vma.h"

@@ -35,7 +36,7 @@ void i915_vma_snapshot_init(struct i915_vma_snapshot *vsnap,
 		vsnap->pages_rsgt = i915_refct_sgt_get(vma->obj->mm.rsgt);
 	vsnap->mr = vma->obj->mm.region;
 	kref_init(&vsnap->kref);
-	vsnap->vma_resource = &vma->active;
+	vsnap->vma_resource = i915_vma_get_current_resource(vma);
 	vsnap->onstack = false;
 	vsnap->present = true;
 }

@@ -62,6 +63,7 @@ static void vma_snapshot_release(struct kref *ref)
 		container_of(ref, typeof(*vsnap), kref);
 
 	vsnap->present = false;
+	i915_vma_resource_put(vsnap->vma_resource);
 	if (vsnap->pages_rsgt)
 		i915_refct_sgt_put(vsnap->pages_rsgt);
 	if (!vsnap->onstack)

@@ -109,12 +111,7 @@ void i915_vma_snapshot_put_onstack(struct i915_vma_snapshot *vsnap)
 bool i915_vma_snapshot_resource_pin(struct i915_vma_snapshot *vsnap,
 				    bool *lockdep_cookie)
 {
-	bool pinned = i915_active_acquire_if_busy(vsnap->vma_resource);
-
-	if (pinned)
-		*lockdep_cookie = dma_fence_begin_signalling();
-
-	return pinned;
+	return i915_vma_resource_hold(vsnap->vma_resource, lockdep_cookie);
 }
 
 /**

@@ -128,7 +125,5 @@ bool i915_vma_snapshot_resource_pin(struct i915_vma_snapshot *vsnap,
 void i915_vma_snapshot_resource_unpin(struct i915_vma_snapshot *vsnap,
 				      bool lockdep_cookie)
 {
-	dma_fence_end_signalling(lockdep_cookie);
-
-	return i915_active_release(vsnap->vma_resource);
+	i915_vma_resource_unhold(vsnap->vma_resource, lockdep_cookie);
 }

index 940581df4622..e74588dd676b 100644
@@ -31,10 +31,7 @@ struct sg_table;
  * @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: FIXME: A means to keep the unbind fence from signaling.
- * Temporarily while we have only sync unbinds, and still use the vma
- * active, we use that. With async unbinding we need a signaling refcount
- * for the unbind fence.
+ * @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.

@@ -49,7 +46,7 @@ struct i915_vma_snapshot {
 	struct i915_refct_sgt *pages_rsgt;
 	struct intel_memory_region *mr;
 	struct kref kref;
-	struct i915_active *vma_resource;
+	struct i915_vma_resource *vma_resource;
 	u32 page_sizes;
 	bool onstack:1;
 	bool present:1;

index ca575e129ced..ac1928d1dc11 100644
@@ -95,6 +95,8 @@ enum i915_cache_level;
  *
  */
 
+struct i915_vma_resource;
+
 struct intel_remapped_plane_info {
 	/* in gtt pages */
 	u32 offset:31;

@@ -291,6 +293,9 @@ struct i915_vma {
 	struct list_head evict_link;
 
 	struct list_head closed_link;
+
+	/** The async vma resource. Protected by the vm_mutex */
+	struct i915_vma_resource *resource;
 };
 
 #endif

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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)

index 1c903d813097..71e778ecaeb8 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;

@@ -566,31 +567,7 @@ 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);
 

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;
 			}

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;

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;
 	}
 }
 

index 548d599c09dc..7b793a295475 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)

179 lines not on this page · raw message

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) };

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;
 
-	vm->insert_entries(vm, vma, cache_level, pte_flags);
+	vm->insert_entries(vm, vma_res, cache_level, pte_flags);
 	wmb();
 }
 
-void ppgtt_unbind_vma(struct i915_address_space *vm, struct i915_vma *vma)
+void ppgtt_unbind_vma(struct i915_address_space *vm,
+		      struct i915_vma_resource *vma_res)
 {
-	if (test_and_clear_bit(I915_VMA_ALLOC_BIT, __i915_vma_flags(vma)))
-		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)

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;

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;
 
 	/*

index 6966fe08df92..f3141b58d912 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:

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;

index 05dcbc259b82..42fff9ddf096 100644
@@ -299,7 +299,7 @@ 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)

@@ -376,6 +376,21 @@ 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

@@ -433,7 +448,7 @@ 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);

@@ -473,7 +488,8 @@ 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);

@@ -1779,7 +1795,7 @@ 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);

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);
 

index 0b4eaafe47d7..b50e67035d15 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,

128 lines not on this page · raw message

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;

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;
 };

index ac1928d1dc11..88370dadca82 100644
@@ -249,22 +249,20 @@ struct i915_vma {
 
 #define I915_VMA_BIND_MASK (I915_VMA_GLOBAL_BIND | I915_VMA_LOCAL_BIND)
 
-#define I915_VMA_ALLOC_BIT	12
-
-#define I915_VMA_ERROR_BIT	13
+#define I915_VMA_ERROR_BIT	12
 #define I915_VMA_ERROR		((int)BIT(I915_VMA_ERROR_BIT))
 
-#define I915_VMA_GGTT_BIT	14
-#define I915_VMA_CAN_FENCE_BIT	15
-#define I915_VMA_USERFAULT_BIT	16
-#define I915_VMA_GGTT_WRITE_BIT	17
+#define I915_VMA_GGTT_BIT	13
+#define I915_VMA_CAN_FENCE_BIT	14
+#define I915_VMA_USERFAULT_BIT	15
+#define I915_VMA_GGTT_WRITE_BIT	16
 
 #define I915_VMA_GGTT		((int)BIT(I915_VMA_GGTT_BIT))
 #define I915_VMA_CAN_FENCE	((int)BIT(I915_VMA_CAN_FENCE_BIT))
 #define I915_VMA_USERFAULT	((int)BIT(I915_VMA_USERFAULT_BIT))
 #define I915_VMA_GGTT_WRITE	((int)BIT(I915_VMA_GGTT_WRITE_BIT))
 
-#define I915_VMA_SCANOUT_BIT	18
+#define I915_VMA_SCANOUT_BIT	17
 #define I915_VMA_SCANOUT	((int)BIT(I915_VMA_SCANOUT_BIT))
 
 	struct i915_active active;

177 lines not on this page · raw message

index 7863d0f4bbd7..568840e7ca66 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)
 {
 }
 

index 42fff9ddf096..29c770a764aa 100644
@@ -306,10 +306,8 @@ static void __vma_release(struct dma_fence_work *work)
 {
 	struct i915_vma_work *vw = container_of(work, typeof(*vw), base);
 
-	if (vw->pinned) {
-		__i915_gem_object_unpin_pages(vw->pinned);
+	if (vw->pinned)
 		i915_gem_object_put(vw->pinned);
-	}
 
 	i915_vm_free_pt_stash(vw->vm, &vw->stash);
 	i915_vm_put(vw->vm);

@@ -478,7 +476,6 @@ int i915_vma_bind(struct i915_vma *vma,
 
 		work->base.dma.error = 0; /* enable the queue_work() */
 
-		__i915_gem_object_pin_pages(vma->obj);
 		work->pinned = i915_gem_object_get(vma->obj);
 	} else {
 		if (vma->obj) {

index 8653855d808b..1de306c03aaf 100644
@@ -142,7 +142,16 @@ int i915_ttm_move_notify(struct ttm_buffer_object *bo)
 	struct drm_i915_gem_object *obj = i915_ttm_to_gem(bo);
 	int ret;
 
-	ret = i915_gem_object_unbind(obj, I915_GEM_OBJECT_UNBIND_ACTIVE);
+	/*
+	 * Note: The async unbinding here will actually transform the
+	 * blocking wait for unbind into a wait before finally submitting
+	 * evict / migration blit and thus stall the migration timeline
+	 * which may not be good for overall throughput. We should make
+	 * sure we await the unbind fences *after* the migration blit
+	 * instead of *before* as we currently do.
+	 */
+	ret = i915_gem_object_unbind(obj, I915_GEM_OBJECT_UNBIND_ACTIVE |
+				     I915_GEM_OBJECT_UNBIND_ASYNC);
 	if (ret)
 		return ret;
 

index e49b6250c4b7..a1b2761bc16e 100644
@@ -142,7 +142,7 @@ void i915_ggtt_suspend_vm(struct i915_address_space *vm)
 			continue;
 
 		if (!i915_vma_is_bound(vma, I915_VMA_GLOBAL_BIND)) {
-			__i915_vma_evict(vma);
+			__i915_vma_evict(vma, false);
 			drm_mm_remove_node(&vma->node);
 		}
 	}

index a94be0306464..46be4197b93f 100644
@@ -161,6 +161,9 @@ static void __i915_vm_release(struct work_struct *work)
 	struct i915_address_space *vm =
 		container_of(work, struct i915_address_space, release_work);
 
+	/* Synchronize async unbinds. */
+	i915_vma_resource_bind_dep_sync_all(vm);
+
 	vm->cleanup(vm);
 	i915_address_space_fini(vm);
 

@@ -189,6 +192,7 @@ void i915_address_space_init(struct i915_address_space *vm, int subclass)
 	if (!kref_read(&vm->resv_ref))
 		kref_init(&vm->resv_ref);
 
+	vm->pending_unbind = RB_ROOT_CACHED;
 	INIT_WORK(&vm->release_work, __i915_vm_release);
 	atomic_set(&vm->open, 1);
 

index 676b839d1a34..8073438b67c8 100644
@@ -265,6 +265,9 @@ struct i915_address_space {
 	/* Flags used when creating page-table objects for this vm */
 	unsigned long lmem_pt_obj_flags;
 
+	/* Interval tree for pending unbind vma resources */
+	struct rb_root_cached pending_unbind;
+
 	struct drm_i915_gem_object *
 		(*alloc_pt_dma)(struct i915_address_space *vm, int sz);
 	struct drm_i915_gem_object *

index a44e0c3298fc..6caec2eca8cd 100644
@@ -1661,6 +1661,7 @@ int i915_gem_object_unbind(struct drm_i915_gem_object *obj,
 #define I915_GEM_OBJECT_UNBIND_BARRIER BIT(1)
 #define I915_GEM_OBJECT_UNBIND_TEST BIT(2)
 #define I915_GEM_OBJECT_UNBIND_VM_TRYLOCK BIT(3)
+#define I915_GEM_OBJECT_UNBIND_ASYNC BIT(4)
 
 void i915_gem_runtime_suspend(struct drm_i915_private *dev_priv);
 

index 3729ec01b5bc..7188db42c85b 100644
@@ -157,10 +157,16 @@ int i915_gem_object_unbind(struct drm_i915_gem_object *obj,
 		spin_unlock(&obj->vma.lock);
 
 		if (vma) {
+			bool vm_trylock = !!(flags & I915_GEM_OBJECT_UNBIND_VM_TRYLOCK);
 			ret = -EBUSY;
-			if (flags & I915_GEM_OBJECT_UNBIND_ACTIVE ||
-			    !i915_vma_is_active(vma)) {
-				if (flags & I915_GEM_OBJECT_UNBIND_VM_TRYLOCK) {
+			if (flags & I915_GEM_OBJECT_UNBIND_ASYNC) {
+				assert_object_held(vma->obj);
+				ret = i915_vma_unbind_async(vma, vm_trylock);
+			}
+
+			if (ret == -EBUSY && (flags & I915_GEM_OBJECT_UNBIND_ACTIVE ||
+					      !i915_vma_is_active(vma))) {
+				if (vm_trylock) {
 					if (mutex_trylock(&vma->vm->mutex)) {
 						ret = __i915_vma_unbind(vma);
 						mutex_unlock(&vma->vm->mutex);

index f6bcd2f89257..a8f175960b34 100644
@@ -17,6 +17,7 @@
 #include "i915_scheduler.h"
 #include "i915_selftest.h"
 #include "i915_vma.h"
+#include "i915_vma_resource.h"
 
 static int i915_check_nomodeset(void)
 {

@@ -64,6 +65,8 @@ static const struct {
 	  .exit = i915_scheduler_module_exit },
 	{ .init = i915_vma_module_init,
 	  .exit = i915_vma_module_exit },
+	{ .init = i915_vma_resource_module_init,
+	  .exit = i915_vma_resource_module_exit },
 	{ .init = i915_mock_selftests },
 	{ .init = i915_pmu_init,
 	  .exit = i915_pmu_exit },

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index 1df57ec832bd..a560bae04e7e 100644
@@ -213,9 +213,10 @@ bool i915_vma_misplaced(const struct i915_vma *vma,
 			u64 size, u64 alignment, u64 flags);
 void __i915_vma_set_map_and_fenceable(struct i915_vma *vma);
 void i915_vma_revoke_mmap(struct i915_vma *vma);
-void __i915_vma_evict(struct i915_vma *vma);
+struct dma_fence *__i915_vma_evict(struct i915_vma *vma, bool async);
 int __i915_vma_unbind(struct i915_vma *vma);
 int __must_check i915_vma_unbind(struct i915_vma *vma);
+int __must_check i915_vma_unbind_async(struct i915_vma *vma, bool trylock_vm);
 void i915_vma_unlink_ctx(struct i915_vma *vma);
 void i915_vma_close(struct i915_vma *vma);
 void i915_vma_reopen(struct i915_vma *vma);

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index d87b508b59b1..1a9e1f940a7d 100644
@@ -756,6 +756,18 @@ i915_gem_object_get_moving_fence(struct drm_i915_gem_object *obj)
 	return dma_fence_get(i915_gem_to_ttm(obj)->moving);
 }
 
+void i915_gem_object_set_moving_fence(struct drm_i915_gem_object *obj,
+				      struct dma_fence *fence)
+{
+	struct dma_fence **moving = &i915_gem_to_ttm(obj)->moving;
+
+	if (*moving == fence)
+		return;
+
+	dma_fence_put(*moving);
+	*moving = dma_fence_get(fence);
+}
+
 /**
  * i915_gem_object_wait_moving_fence - Wait for the object's moving fence if any
  * @obj: The object whose moving fence to wait for.

index bc448f895ae8..02c37fe4a535 100644
@@ -523,6 +523,9 @@ i915_gem_object_finish_access(struct drm_i915_gem_object *obj)
 struct dma_fence *
 i915_gem_object_get_moving_fence(struct drm_i915_gem_object *obj);
 
+void i915_gem_object_set_moving_fence(struct drm_i915_gem_object *obj,
+				      struct dma_fence *fence);
+
 int i915_gem_object_wait_moving_fence(struct drm_i915_gem_object *obj,
 				      bool intr);
 

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index 3e359de0e460..cf283b5f6ffe 100644
@@ -31,7 +31,6 @@
 #include "i915_gem_ioctls.h"
 #include "i915_trace.h"
 #include "i915_user_extensions.h"
-#include "i915_vma_snapshot.h"
 
 struct eb_vma {
 	struct i915_vma *vma;

@@ -1954,7 +1953,6 @@ static void eb_capture_stage(struct i915_execbuffer *eb)
 {
 	const unsigned int count = eb->buffer_count;
 	unsigned int i = count, j;
-	struct i915_vma_snapshot *vsnap;
 
 	while (i--) {
 		struct eb_vma *ev = &eb->vma[i];

@@ -1964,11 +1962,6 @@ static void eb_capture_stage(struct i915_execbuffer *eb)
 		if (!(flags & EXEC_OBJECT_CAPTURE))
 			continue;
 
-		vsnap = i915_vma_snapshot_alloc(GFP_KERNEL);
-		if (!vsnap)
-			continue;
-
-		i915_vma_snapshot_init(vsnap, vma, "user");
 		for_each_batch_create_order(eb, j) {
 			struct i915_capture_list *capture;
 

@@ -1977,10 +1970,9 @@ static void eb_capture_stage(struct i915_execbuffer *eb)
 				continue;
 
 			capture->next = eb->capture_lists[j];
-			capture->vma_snapshot = i915_vma_snapshot_get(vsnap);
+			capture->vma_res = i915_vma_resource_get(vma->resource);
 			eb->capture_lists[j] = capture;
 		}
-		i915_vma_snapshot_put(vsnap);
 	}
 }
 

@@ -3283,9 +3275,8 @@ eb_requests_create(struct i915_execbuffer *eb, struct dma_fence *in_fence,
 		 * _onstack interface.
 		 */
 		if (eb->batches[i]->vma)
-			i915_vma_snapshot_init_onstack(&eb->requests[i]->batch_snapshot,
-						       eb->batches[i]->vma,
-						       "batch");
+			eb->requests[i]->batch_res =
+				i915_vma_resource_get(eb->batches[i]->vma->resource);
 		if (eb->batch_pool) {
 			GEM_BUG_ON(intel_context_is_parallel(eb->context));
 			intel_gt_buffer_pool_mark_active(eb->batch_pool,

index 7b793a295475..baa346a49976 100644
@@ -1708,18 +1708,15 @@ static void intel_engine_print_registers(struct intel_engine_cs *engine,
 
 static void print_request_ring(struct drm_printer *m, struct i915_request *rq)
 {
-	struct i915_vma_snapshot *vsnap = &rq->batch_snapshot;
+	struct i915_vma_resource *vma_res = rq->batch_res;
 	void *ring;
 	int size;
 
-	if (!i915_vma_snapshot_present(vsnap))
-		vsnap = NULL;
-
 	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->vma_resource->start) : ~0u,
-		   vsnap ? lower_32_bits(vsnap->vma_resource->start) : ~0u);
+		   vma_res ? upper_32_bits(vma_res->start) : ~0u,
+		   vma_res ? lower_32_bits(vma_res->start) : ~0u);
 
 	size = rq->tail - rq->head;
 	if (rq->tail < rq->head)

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index 76cf5ac91e94..ba3a70b2cc57 100644
@@ -116,8 +116,10 @@ static void i915_fence_release(struct dma_fence *fence)
 		   rq->guc_prio != GUC_PRIO_FINI);
 
 	i915_request_free_capture_list(fetch_and_zero(&rq->capture_list));
-	if (i915_vma_snapshot_present(&rq->batch_snapshot))
-		i915_vma_snapshot_put_onstack(&rq->batch_snapshot);
+	if (rq->batch_res) {
+		i915_vma_resource_put(rq->batch_res);
+		rq->batch_res = NULL;
+	}
 
 	/*
 	 * The request is put onto a RCU freelist (i.e. the address

@@ -308,7 +310,7 @@ void i915_request_free_capture_list(struct i915_capture_list *capture)
 	while (capture) {
 		struct i915_capture_list *next = capture->next;
 
-		i915_vma_snapshot_put(capture->vma_snapshot);
+		i915_vma_resource_put(capture->vma_res);
 		kfree(capture);
 		capture = next;
 	}

@@ -854,7 +856,7 @@ static void __i915_request_ctor(void *arg)
 	i915_sw_fence_init(&rq->semaphore, semaphore_notify);
 
 	clear_capture_list(rq);
-	rq->batch_snapshot.present = false;
+	rq->batch_res = NULL;
 
 	init_llist_head(&rq->execute_cb);
 }

@@ -960,7 +962,7 @@ __i915_request_create(struct intel_context *ce, gfp_t gfp)
 	__rq_init_watchdog(rq);
 	assert_capture_list_is_null(rq);
 	GEM_BUG_ON(!llist_empty(&rq->execute_cb));
-	GEM_BUG_ON(i915_vma_snapshot_present(&rq->batch_snapshot));
+	GEM_BUG_ON(rq->batch_res);
 
 	/*
 	 * Reserve space in the ring buffer for all the commands required to

index 170ee78c2858..28b1f9db5487 100644
@@ -40,7 +40,7 @@
 #include "i915_scheduler.h"
 #include "i915_selftest.h"
 #include "i915_sw_fence.h"
-#include "i915_vma_snapshot.h"
+#include "i915_vma_resource.h"
 
 #include <uapi/drm/i915_drm.h>
 

@@ -52,7 +52,7 @@ struct i915_request;
 
 #if IS_ENABLED(CONFIG_DRM_I915_CAPTURE_ERROR)
 struct i915_capture_list {
-	struct i915_vma_snapshot *vma_snapshot;
+	struct i915_vma_resource *vma_res;
 	struct i915_capture_list *next;
 };
 

@@ -300,7 +300,7 @@ struct i915_request {
 	/** Batch buffer pointer for selftest internal use. */
 	I915_SELFTEST_DECLARE(struct i915_vma *batch);
 
-	struct i915_vma_snapshot batch_snapshot;
+	struct i915_vma_resource *batch_res;
 
 #if IS_ENABLED(CONFIG_DRM_I915_CAPTURE_ERROR)
 	/**

index 5881b0713b1a..1f15c3298112 100644
@@ -289,7 +289,6 @@ struct i915_vma_work {
 	struct i915_vma_resource *vma_res;
 	struct drm_i915_gem_object *pinned;
 	struct i915_sw_dma_fence_cb cb;
-	struct i915_refct_sgt *rsgt;
 	enum i915_cache_level cache_level;
 	unsigned int flags;
 };

@@ -315,8 +314,6 @@ static void __vma_release(struct dma_fence_work *work)
 	i915_vm_put(vw->vm);
 	if (vw->vma_res)
 		i915_vma_resource_put(vw->vma_res);
-	if (vw->rsgt)
-		i915_refct_sgt_put(vw->rsgt);
 }
 
 static const struct dma_fence_work_ops bind_ops = {

@@ -387,8 +384,8 @@ i915_vma_resource_init_from_vma(struct i915_vma_resource *vma_res,
 	struct drm_i915_gem_object *obj = vma->obj;
 
 	i915_vma_resource_init(vma_res, vma->vm, vma->pages, &vma->page_sizes,
-			       i915_gem_object_is_readonly(obj),
-			       i915_gem_object_is_lmem(obj),
+			       obj->mm.rsgt, i915_gem_object_is_readonly(obj),
+			       i915_gem_object_is_lmem(obj), obj->mm.region,
 			       vma->ops, vma->private, vma->node.start,
 			       vma->node.size, vma->size);
 }

@@ -479,8 +476,6 @@ int i915_vma_bind(struct i915_vma *vma,
 		work->vma_res = i915_vma_resource_get(vma->resource);
 		work->cache_level = cache_level;
 		work->flags = bind_flags;
-		if (vma->obj->mm.rsgt)
-			work->rsgt = i915_refct_sgt_get(vma->obj->mm.rsgt);
 
 		/*
 		 * Note we only want to chain up to the migration fence on

@@ -506,7 +501,7 @@ int i915_vma_bind(struct i915_vma *vma,
 		 * on the object to avoid waiting for the async bind to
 		 * complete in the object destruction path.
 		 */
-		if (!work->rsgt)
+		if (!work->vma_res->bi.pages_rsgt)
 			work->pinned = i915_gem_object_get(vma->obj);
 	} else {
 		if (vma->obj) {

@@ -1827,7 +1822,7 @@ struct dma_fence *__i915_vma_evict(struct i915_vma *vma, bool async)
 	GEM_BUG_ON(i915_vma_has_userfault(vma));
 
 	/* Object backend must be async capable. */
-	GEM_WARN_ON(async && !vma->obj->mm.rsgt);
+	GEM_WARN_ON(async && !vma->resource->bi.pages_rsgt);
 
 	/* If vm is not open, unbind is a nop. */
 	vma_res->needs_wakeref = i915_vma_is_bound(vma, I915_VMA_GLOBAL_BIND) &&

@@ -1840,9 +1835,6 @@ struct dma_fence *__i915_vma_evict(struct i915_vma *vma, bool async)
 	atomic_and(~(I915_VMA_BIND_MASK | I915_VMA_ERROR | I915_VMA_GGTT_WRITE),
 		   &vma->flags);
 
-	/* Object backend must be async capable. */
-	GEM_WARN_ON(async && !vma->obj->mm.rsgt);
-
 	i915_vma_detach(vma);
 
 	if (!async && unbind_fence) {

index 3e55a30b2da7..1f41c0c699eb 100644
@@ -9,6 +9,7 @@
 #include "i915_sw_fence.h"
 #include "i915_vma_resource.h"
 #include "i915_drv.h"
+#include "intel_memory_region.h"
 
 #include "gt/intel_gtt.h"
 

@@ -117,6 +118,9 @@ static void __i915_vma_resource_unhold(struct i915_vma_resource *vma_res)
 		vma_res_itree_remove(vma_res, &vm->pending_unbind);
 		mutex_unlock(&vm->mutex);
 	}
+
+	if (vma_res->bi.pages_rsgt)
+		i915_refct_sgt_put(vma_res->bi.pages_rsgt);
 }
 
 /**

index cb3f4e1e8457..25913913baa6 100644
@@ -10,9 +10,12 @@
 #include <linux/refcount.h>
 
 #include "i915_gem.h"
+#include "i915_scatterlist.h"
 #include "i915_sw_fence.h"
 #include "intel_runtime_pm.h"
 
+struct intel_memory_region;
+
 struct i915_page_sizes {
 	/**
 	 * The sg mask of the pages sg_table. i.e the mask of

@@ -46,6 +49,7 @@ struct i915_page_sizes {
  * @__subtree_last: Interval tree private member.
  * @vm: non-refcounted pointer to the vm. This is for internal use only and
  * this member is cleared after vm_resource unbind.
+ * @mr: The memory region of the object pointed to by the vma.
  * @ops: Pointer to the backend i915_vma_ops.
  * @private: Bind backend private info.
  * @start: Offset into the address space of bind range start.

@@ -54,8 +58,10 @@ struct i915_page_sizes {
  * @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.
- * @immediate_unbind: Unbind can be done immediately and don't need to be
- * deferred to a work item awaiting unsignaled fences.
+ * @immediate_unbind: Unbind can be done immediately and doesn't need to be
+ * deferred to a work item awaiting unsignaled fences. This is a hack.
+ * (dma_fence_work uses a fence flag for this, but this seems slightly
+ * cleaner).
  *
  * The lifetime of a struct i915_vma_resource is from a binding request to
  * the actual possible asynchronous unbind has completed.

@@ -80,16 +86,22 @@ struct i915_vma_resource {
 	 * and flags
 	 * @pages: The pages sg-table.
 	 * @page_sizes: Page sizes of the pages.
+	 * @pages_rsgt: Refcounted sg-table when delayed object destruction
+	 * is supported. May be NULL.
 	 * @readonly: Whether the vma should be bound read-only.
 	 * @lmem: Whether the vma points to lmem.
 	 */
 	struct i915_vma_bindinfo {
 		struct sg_table *pages;
 		struct i915_page_sizes page_sizes;
+		struct i915_refct_sgt *pages_rsgt;
 		bool readonly:1;
 		bool lmem:1;
 	} bi;
 
+#if IS_ENABLED(CONFIG_DRM_I915_CAPTURE_ERROR)
+	struct intel_memory_region *mr;
+#endif
 	const struct i915_vma_ops *ops;
 	void *private;
 	u64 start;

@@ -145,8 +157,11 @@ static inline void i915_vma_resource_put(struct i915_vma_resource *vma_res)
  * @vm: Pointer to the vm.
  * @pages: The pages sg-table.
  * @page_sizes: Page sizes of the pages.
+ * @pages_rsgt: Pointer to a struct i915_refct_sgt of an object with
+ * delayed destruction.
  * @readonly: Whether the vma should be bound read-only.
  * @lmem: Whether the vma points to lmem.
+ * @mr: The memory region of the object the vma points to.
  * @ops: The backend ops.
  * @private: Bind backend private info.
  * @start: Offset into the address space of bind range start.

@@ -162,8 +177,10 @@ static inline void i915_vma_resource_init(struct i915_vma_resource *vma_res,
 					  struct i915_address_space *vm,
 					  struct sg_table *pages,
 					  const struct i915_page_sizes *page_sizes,
+					  struct i915_refct_sgt *pages_rsgt,
 					  bool readonly,
 					  bool lmem,
+					  struct intel_memory_region *mr,
 					  const struct i915_vma_ops *ops,
 					  void *private,
 					  u64 start,

@@ -174,8 +191,13 @@ static inline void i915_vma_resource_init(struct i915_vma_resource *vma_res,
 	vma_res->vm = vm;
 	vma_res->bi.pages = pages;
 	vma_res->bi.page_sizes = *page_sizes;
+	if (pages_rsgt)
+		vma_res->bi.pages_rsgt = i915_refct_sgt_get(pages_rsgt);
 	vma_res->bi.readonly = readonly;
 	vma_res->bi.lmem = lmem;
+#if IS_ENABLED(CONFIG_DRM_I915_CAPTURE_ERROR)
+	vma_res->mr = mr;
+#endif
 	vma_res->ops = ops;
 	vma_res->private = private;
 	vma_res->start = start;

@@ -186,6 +208,8 @@ static inline void i915_vma_resource_init(struct i915_vma_resource *vma_res,
 static inline void i915_vma_resource_fini(struct i915_vma_resource *vma_res)
 {
 	GEM_BUG_ON(refcount_read(&vma_res->hold_count) != 1);
+	if (vma_res->bi.pages_rsgt)
+		i915_refct_sgt_put(vma_res->bi.pages_rsgt);
 	i915_sw_fence_fini(&vma_res->chain);
 }
 

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