drm/i915: pass the vma to insert_entries

The vma already contains most of the information we need for insertion.
But also in preparation for supporting huge gtt pages, it would be
useful to know the details of the vma, such that we can we can easily
determine the page sizes we are allowed to use when inserting into the
48b PPGTT.  This is especially true for 64K where we can't just
arbitrarily use it, since we require aligning/padding the vm space to
2M, which sometimes we can't enforce in the upper levels.

Suggested-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Matthew Auld <matthew.auld@intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: http://patchwork.freedesktop.org/patch/msgid/20170622095836.6800-1-matthew.auld@intel.com
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

drivers/gpu/drm/i915/i915_gem_gtt.c

@@ -207,8 +207,7 @@ static int ppgtt_bind_vma(struct i915_vma *vma,
 	if (vma->obj->gt_ro)
 		pte_flags |= PTE_READ_ONLY;
 
-	vma->vm->insert_entries(vma->vm, vma->pages, vma->node.start,
-				cache_level, pte_flags);
+	vma->vm->insert_entries(vma->vm, vma, cache_level, pte_flags);
 
 	return 0;
 }
@@ -907,37 +906,35 @@ gen8_ppgtt_insert_pte_entries(struct i915_hw_ppgtt *ppgtt,
 }
 
 static void gen8_ppgtt_insert_3lvl(struct i915_address_space *vm,
-				   struct sg_table *pages,
-				   u64 start,
+				   struct i915_vma *vma,
 				   enum i915_cache_level cache_level,
 				   u32 unused)
 {
-	struct i915_hw_ppgtt *ppgtt = i915_vm_to_ppgtt(vm);
+	struct i915_hw_ppgtt *ppgtt = i915_vm_to_ppgtt(vma->vm);
 	struct sgt_dma iter = {
-		.sg = pages->sgl,
+		.sg = vma->pages->sgl,
 		.dma = sg_dma_address(iter.sg),
 		.max = iter.dma + iter.sg->length,
 	};
-	struct gen8_insert_pte idx = gen8_insert_pte(start);
+	struct gen8_insert_pte idx = gen8_insert_pte(vma->node.start);
 
 	gen8_ppgtt_insert_pte_entries(ppgtt, &ppgtt->pdp, &iter, &idx,
 				      cache_level);
 }
 
 static void gen8_ppgtt_insert_4lvl(struct i915_address_space *vm,
-				   struct sg_table *pages,
-				   u64 start,
+				   struct i915_vma *vma,
 				   enum i915_cache_level cache_level,
 				   u32 unused)
 {
 	struct i915_hw_ppgtt *ppgtt = i915_vm_to_ppgtt(vm);
 	struct sgt_dma iter = {
-		.sg = pages->sgl,
+		.sg = vma->pages->sgl,
 		.dma = sg_dma_address(iter.sg),
 		.max = iter.dma + iter.sg->length,
 	};
 	struct i915_page_directory_pointer **pdps = ppgtt->pml4.pdps;
-	struct gen8_insert_pte idx = gen8_insert_pte(start);
+	struct gen8_insert_pte idx = gen8_insert_pte(vma->node.start);
 
 	while (gen8_ppgtt_insert_pte_entries(ppgtt, pdps[idx.pml4e++], &iter,
 					     &idx, cache_level))
@@ -1621,13 +1618,12 @@ static void gen6_ppgtt_clear_range(struct i915_address_space *vm,
 }
 
 static void gen6_ppgtt_insert_entries(struct i915_address_space *vm,
-				      struct sg_table *pages,
-				      u64 start,
+				      struct i915_vma *vma,
 				      enum i915_cache_level cache_level,
 				      u32 flags)
 {
 	struct i915_hw_ppgtt *ppgtt = i915_vm_to_ppgtt(vm);
-	unsigned first_entry = start >> PAGE_SHIFT;
+	unsigned first_entry = vma->node.start >> PAGE_SHIFT;
 	unsigned act_pt = first_entry / GEN6_PTES;
 	unsigned act_pte = first_entry % GEN6_PTES;
 	const u32 pte_encode = vm->pte_encode(0, cache_level, flags);
@@ -1635,7 +1631,7 @@ static void gen6_ppgtt_insert_entries(struct i915_address_space *vm,
 	gen6_pte_t *vaddr;
 
 	vaddr = kmap_atomic_px(ppgtt->pd.page_table[act_pt]);
-	iter.sg = pages->sgl;
+	iter.sg = vma->pages->sgl;
 	iter.dma = sg_dma_address(iter.sg);
 	iter.max = iter.dma + iter.sg->length;
 	do {
@@ -2090,8 +2086,7 @@ static void gen8_ggtt_insert_page(struct i915_address_space *vm,
 }
 
 static void gen8_ggtt_insert_entries(struct i915_address_space *vm,
-				     struct sg_table *st,
-				     u64 start,
+				     struct i915_vma *vma,
 				     enum i915_cache_level level,
 				     u32 unused)
 {
@@ -2102,8 +2097,8 @@ static void gen8_ggtt_insert_entries(struct i915_address_space *vm,
 	dma_addr_t addr;
 
 	gtt_entries = (gen8_pte_t __iomem *)ggtt->gsm;
-	gtt_entries += start >> PAGE_SHIFT;
-	for_each_sgt_dma(addr, sgt_iter, st)
+	gtt_entries += vma->node.start >> PAGE_SHIFT;
+	for_each_sgt_dma(addr, sgt_iter, vma->pages)
 		gen8_set_pte(gtt_entries++, pte_encode | addr);
 
 	wmb();
@@ -2137,17 +2132,16 @@ static void gen6_ggtt_insert_page(struct i915_address_space *vm,
  * mapped BAR (dev_priv->mm.gtt->gtt).
  */
 static void gen6_ggtt_insert_entries(struct i915_address_space *vm,
-				     struct sg_table *st,
-				     u64 start,
+				     struct i915_vma *vma,
 				     enum i915_cache_level level,
 				     u32 flags)
 {
 	struct i915_ggtt *ggtt = i915_vm_to_ggtt(vm);
 	gen6_pte_t __iomem *entries = (gen6_pte_t __iomem *)ggtt->gsm;
-	unsigned int i = start >> PAGE_SHIFT;
+	unsigned int i = vma->node.start >> PAGE_SHIFT;
 	struct sgt_iter iter;
 	dma_addr_t addr;
-	for_each_sgt_dma(addr, iter, st)
+	for_each_sgt_dma(addr, iter, vma->pages)
 		iowrite32(vm->pte_encode(addr, level, flags), &entries[i++]);
 	wmb();
 
@@ -2229,8 +2223,7 @@ static void bxt_vtd_ggtt_insert_page__BKL(struct i915_address_space *vm,
 
 struct insert_entries {
 	struct i915_address_space *vm;
-	struct sg_table *st;
-	u64 start;
+	struct i915_vma *vma;
 	enum i915_cache_level level;
 };
 
@@ -2238,19 +2231,18 @@ static int bxt_vtd_ggtt_insert_entries__cb(void *_arg)
 {
 	struct insert_entries *arg = _arg;
 
-	gen8_ggtt_insert_entries(arg->vm, arg->st, arg->start, arg->level, 0);
+	gen8_ggtt_insert_entries(arg->vm, arg->vma, arg->level, 0);
 	bxt_vtd_ggtt_wa(arg->vm);
 
 	return 0;
 }
 
 static void bxt_vtd_ggtt_insert_entries__BKL(struct i915_address_space *vm,
-					     struct sg_table *st,
-					     u64 start,
+					     struct i915_vma *vma,
 					     enum i915_cache_level level,
 					     u32 unused)
 {
-	struct insert_entries arg = { vm, st, start, level };
+	struct insert_entries arg = { vma->vm, vma, level };
 
 	stop_machine(bxt_vtd_ggtt_insert_entries__cb, &arg, NULL);
 }
@@ -2316,15 +2308,15 @@ static void i915_ggtt_insert_page(struct i915_address_space *vm,
 }
 
 static void i915_ggtt_insert_entries(struct i915_address_space *vm,
-				     struct sg_table *pages,
-				     u64 start,
+				     struct i915_vma *vma,
 				     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(pages, start >> PAGE_SHIFT, flags);
+	intel_gtt_insert_sg_entries(vma->pages, vma->node.start >> PAGE_SHIFT,
+				    flags);
 }
 
 static void i915_ggtt_clear_range(struct i915_address_space *vm,
@@ -2353,8 +2345,7 @@ static int ggtt_bind_vma(struct i915_vma *vma,
 		pte_flags |= PTE_READ_ONLY;
 
 	intel_runtime_pm_get(i915);
-	vma->vm->insert_entries(vma->vm, vma->pages, vma->node.start,
-				cache_level, pte_flags);
+	vma->vm->insert_entries(vma->vm, vma, cache_level, pte_flags);
 	intel_runtime_pm_put(i915);
 
 	/*
@@ -2407,16 +2398,13 @@ static int aliasing_gtt_bind_vma(struct i915_vma *vma,
 				goto err_pages;
 		}
 
-		appgtt->base.insert_entries(&appgtt->base,
-					    vma->pages, vma->node.start,
-					    cache_level, pte_flags);
+		appgtt->base.insert_entries(&appgtt->base, vma, cache_level,
+					    pte_flags);
 	}
 
 	if (flags & I915_VMA_GLOBAL_BIND) {
 		intel_runtime_pm_get(i915);
-		vma->vm->insert_entries(vma->vm,
-					vma->pages, vma->node.start,
-					cache_level, pte_flags);
+		vma->vm->insert_entries(vma->vm, vma, cache_level, pte_flags);
 		intel_runtime_pm_put(i915);
 	}
 

drivers/gpu/drm/i915/i915_gem_gtt.h

@@ -313,8 +313,7 @@ struct i915_address_space {
 			    enum i915_cache_level cache_level,
 			    u32 flags);
 	void (*insert_entries)(struct i915_address_space *vm,
-			       struct sg_table *st,
-			       u64 start,
+			       struct i915_vma *vma,
 			       enum i915_cache_level cache_level,
 			       u32 flags);
 	void (*cleanup)(struct i915_address_space *vm);

drivers/gpu/drm/i915/selftests/i915_gem_gtt.c

@@ -197,6 +197,9 @@ static int lowlevel_hole(struct drm_i915_private *i915,
 {
 	I915_RND_STATE(seed_prng);
 	unsigned int size;
+	struct i915_vma mock_vma;
+
+	memset(&mock_vma, 0, sizeof(struct i915_vma));
 
 	/* Keep creating larger objects until one cannot fit into the hole */
 	for (size = 12; (hole_end - hole_start) >> size; size++) {
@@ -255,8 +258,11 @@ static int lowlevel_hole(struct drm_i915_private *i915,
 			    vm->allocate_va_range(vm, addr, BIT_ULL(size)))
 				break;
 
-			vm->insert_entries(vm, obj->mm.pages, addr,
-					   I915_CACHE_NONE, 0);
+			mock_vma.pages = obj->mm.pages;
+			mock_vma.node.size = BIT_ULL(size);
+			mock_vma.node.start = addr;
+
+			vm->insert_entries(vm, &mock_vma, I915_CACHE_NONE, 0);
 		}
 		count = n;
 

drivers/gpu/drm/i915/selftests/mock_gtt.c

@@ -33,8 +33,7 @@ static void mock_insert_page(struct i915_address_space *vm,
 }
 
 static void mock_insert_entries(struct i915_address_space *vm,
-				struct sg_table *st,
-				u64 start,
+				struct i915_vma *vma,
 				enum i915_cache_level level, u32 flags)
 {
 }