Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 208 insertions, 0 deletions

diff --git a/drivers/gpu/drm/i915/gem/i915_gem_region.c b/drivers/gpu/drm/i915/gem/i915_gem_region.c
new file mode 100644
index 0000000000..a4fb577ece
--- /dev/null
+++ b/drivers/gpu/drm/i915/gem/i915_gem_region.c
@@ -0,0 +1,208 @@
+// SPDX-License-Identifier: MIT
+/*
+ * Copyright © 2019 Intel Corporation
+ */
+
+#include <uapi/drm/i915_drm.h>
+
+#include "intel_memory_region.h"
+#include "i915_gem_region.h"
+#include "i915_drv.h"
+#include "i915_trace.h"
+
+void i915_gem_object_init_memory_region(struct drm_i915_gem_object *obj,
+					struct intel_memory_region *mem)
+{
+	obj->mm.region = mem;
+
+	mutex_lock(&mem->objects.lock);
+	list_add(&obj->mm.region_link, &mem->objects.list);
+	mutex_unlock(&mem->objects.lock);
+}
+
+void i915_gem_object_release_memory_region(struct drm_i915_gem_object *obj)
+{
+	struct intel_memory_region *mem = obj->mm.region;
+
+	mutex_lock(&mem->objects.lock);
+	list_del(&obj->mm.region_link);
+	mutex_unlock(&mem->objects.lock);
+}
+
+static struct drm_i915_gem_object *
+__i915_gem_object_create_region(struct intel_memory_region *mem,
+				resource_size_t offset,
+				resource_size_t size,
+				resource_size_t page_size,
+				unsigned int flags)
+{
+	struct drm_i915_gem_object *obj;
+	resource_size_t default_page_size;
+	int err;
+
+	/*
+	 * NB: Our use of resource_size_t for the size stems from using struct
+	 * resource for the mem->region. We might need to revisit this in the
+	 * future.
+	 */
+
+	GEM_BUG_ON(flags & ~I915_BO_ALLOC_FLAGS);
+
+	if (WARN_ON_ONCE(flags & I915_BO_ALLOC_GPU_ONLY &&
+			 (flags & I915_BO_ALLOC_CPU_CLEAR ||
+			  flags & I915_BO_ALLOC_PM_EARLY)))
+		return ERR_PTR(-EINVAL);
+
+	if (!mem)
+		return ERR_PTR(-ENODEV);
+
+	default_page_size = mem->min_page_size;
+	if (page_size)
+		default_page_size = page_size;
+
+	/* We should be able to fit a page within an sg entry */
+	GEM_BUG_ON(overflows_type(default_page_size, u32));
+	GEM_BUG_ON(!is_power_of_2_u64(default_page_size));
+	GEM_BUG_ON(default_page_size < PAGE_SIZE);
+
+	size = round_up(size, default_page_size);
+
+	if (default_page_size == size)
+		flags |= I915_BO_ALLOC_CONTIGUOUS;
+
+	GEM_BUG_ON(!size);
+	GEM_BUG_ON(!IS_ALIGNED(size, I915_GTT_MIN_ALIGNMENT));
+
+	if (i915_gem_object_size_2big(size))
+		return ERR_PTR(-E2BIG);
+
+	obj = i915_gem_object_alloc();
+	if (!obj)
+		return ERR_PTR(-ENOMEM);
+
+	/*
+	 * Anything smaller than the min_page_size can't be freely inserted into
+	 * the GTT, due to alignemnt restrictions. For such special objects,
+	 * make sure we force memcpy based suspend-resume. In the future we can
+	 * revisit this, either by allowing special mis-aligned objects in the
+	 * migration path, or by mapping all of LMEM upfront using cheap 1G
+	 * GTT entries.
+	 */
+	if (default_page_size < mem->min_page_size)
+		flags |= I915_BO_ALLOC_PM_EARLY;
+
+	err = mem->ops->init_object(mem, obj, offset, size, page_size, flags);
+	if (err)
+		goto err_object_free;
+
+	trace_i915_gem_object_create(obj);
+	return obj;
+
+err_object_free:
+	i915_gem_object_free(obj);
+	return ERR_PTR(err);
+}
+
+struct drm_i915_gem_object *
+i915_gem_object_create_region(struct intel_memory_region *mem,
+			      resource_size_t size,
+			      resource_size_t page_size,
+			      unsigned int flags)
+{
+	return __i915_gem_object_create_region(mem, I915_BO_INVALID_OFFSET,
+					       size, page_size, flags);
+}
+
+struct drm_i915_gem_object *
+i915_gem_object_create_region_at(struct intel_memory_region *mem,
+				 resource_size_t offset,
+				 resource_size_t size,
+				 unsigned int flags)
+{
+	GEM_BUG_ON(offset == I915_BO_INVALID_OFFSET);
+
+	if (GEM_WARN_ON(!IS_ALIGNED(size, mem->min_page_size)) ||
+	    GEM_WARN_ON(!IS_ALIGNED(offset, mem->min_page_size)))
+		return ERR_PTR(-EINVAL);
+
+	if (range_overflows(offset, size, resource_size(&mem->region)))
+		return ERR_PTR(-EINVAL);
+
+	if (!(flags & I915_BO_ALLOC_GPU_ONLY) &&
+	    offset + size > mem->io_size &&
+	    !i915_ggtt_has_aperture(to_gt(mem->i915)->ggtt))
+		return ERR_PTR(-ENOSPC);
+
+	return __i915_gem_object_create_region(mem, offset, size, 0,
+					       flags | I915_BO_ALLOC_CONTIGUOUS);
+}
+
+/**
+ * i915_gem_process_region - Iterate over all objects of a region using ops
+ * to process and optionally skip objects
+ * @mr: The memory region
+ * @apply: ops and private data
+ *
+ * This function can be used to iterate over the regions object list,
+ * checking whether to skip objects, and, if not, lock the objects and
+ * process them using the supplied ops. Note that this function temporarily
+ * removes objects from the region list while iterating, so that if run
+ * concurrently with itself may not iterate over all objects.
+ *
+ * Return: 0 if successful, negative error code on failure.
+ */
+int i915_gem_process_region(struct intel_memory_region *mr,
+			    struct i915_gem_apply_to_region *apply)
+{
+	const struct i915_gem_apply_to_region_ops *ops = apply->ops;
+	struct drm_i915_gem_object *obj;
+	struct list_head still_in_list;
+	int ret = 0;
+
+	/*
+	 * In the future, a non-NULL apply->ww could mean the caller is
+	 * already in a locking transaction and provides its own context.
+	 */
+	GEM_WARN_ON(apply->ww);
+
+	INIT_LIST_HEAD(&still_in_list);
+	mutex_lock(&mr->objects.lock);
+	for (;;) {
+		struct i915_gem_ww_ctx ww;
+
+		obj = list_first_entry_or_null(&mr->objects.list, typeof(*obj),
+					       mm.region_link);
+		if (!obj)
+			break;
+
+		list_move_tail(&obj->mm.region_link, &still_in_list);
+		if (!kref_get_unless_zero(&obj->base.refcount))
+			continue;
+
+		/*
+		 * Note: Someone else might be migrating the object at this
+		 * point. The object's region is not stable until we lock
+		 * the object.
+		 */
+		mutex_unlock(&mr->objects.lock);
+		apply->ww = &ww;
+		for_i915_gem_ww(&ww, ret, apply->interruptible) {
+			ret = i915_gem_object_lock(obj, apply->ww);
+			if (ret)
+				continue;
+
+			if (obj->mm.region == mr)
+				ret = ops->process_obj(apply, obj);
+			/* Implicit object unlock */
+		}
+
+		i915_gem_object_put(obj);
+		mutex_lock(&mr->objects.lock);
+		if (ret)
+			break;
+	}
+	list_splice_tail(&still_in_list, &mr->objects.list);
+	mutex_unlock(&mr->objects.lock);
+
+	return ret;
+}