drm/i915: Use the vma resource as argument for gtt binding / unbinding

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
v6:
- Remove I915_VMA_ALLOC_BIT (Matthew Auld)
- Change some members of struct i915_vma_resource from unsigned long to u64
  (Matthew Auld)
v7:
- Fix vma resource size parameters to be u64 rather than unsigned long
  (Matthew Auld)

Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220110172219.107131-3-thomas.hellstrom@linux.intel.com

1 files changed, 12 insertions, 10 deletions

diff --git a/drivers/gpu/drm/i915/gt/intel_ppgtt.c b/drivers/gpu/drm/i915/gt/intel_ppgtt.c
index 083b3090c69c..48e6e2f87700 100644
--- a/drivers/gpu/drm/i915/gt/intel_ppgtt.c
+++ b/drivers/gpu/drm/i915/gt/intel_ppgtt.c
@@ -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)