1 files changed, 221 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nvkm/core/handle.c b/drivers/gpu/drm/nouveau/nvkm/core/handle.c
new file mode 100644
index 000000000000..dc7ff10ebe7b
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nvkm/core/handle.c
@@ -0,0 +1,221 @@
+/*
+ * Copyright 2012 Red Hat Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * Authors: Ben Skeggs
+ */
+#include <core/handle.h>
+#include <core/client.h>
+
+#define hprintk(h,l,f,a...) do {                                               \
+	struct nvkm_client *c = nvkm_client((h)->object);                      \
+	struct nvkm_handle *p = (h)->parent; u32 n = p ? p->name : ~0;         \
+	nv_printk((c), l, "0x%08x:0x%08x "f, n, (h)->name, ##a);               \
+} while(0)
+
+int
+nvkm_handle_init(struct nvkm_handle *handle)
+{
+	struct nvkm_handle *item;
+	int ret;
+
+	hprintk(handle, TRACE, "init running\n");
+	ret = nvkm_object_inc(handle->object);
+	if (ret)
+		return ret;
+
+	hprintk(handle, TRACE, "init children\n");
+	list_for_each_entry(item, &handle->tree, head) {
+		ret = nvkm_handle_init(item);
+		if (ret)
+			goto fail;
+	}
+
+	hprintk(handle, TRACE, "init completed\n");
+	return 0;
+fail:
+	hprintk(handle, ERROR, "init failed with %d\n", ret);
+	list_for_each_entry_continue_reverse(item, &handle->tree, head) {
+		nvkm_handle_fini(item, false);
+	}
+
+	nvkm_object_dec(handle->object, false);
+	return ret;
+}
+
+int
+nvkm_handle_fini(struct nvkm_handle *handle, bool suspend)
+{
+	static char *name[2] = { "fini", "suspend" };
+	struct nvkm_handle *item;
+	int ret;
+
+	hprintk(handle, TRACE, "%s children\n", name[suspend]);
+	list_for_each_entry(item, &handle->tree, head) {
+		ret = nvkm_handle_fini(item, suspend);
+		if (ret && suspend)
+			goto fail;
+	}
+
+	hprintk(handle, TRACE, "%s running\n", name[suspend]);
+	if (handle->object) {
+		ret = nvkm_object_dec(handle->object, suspend);
+		if (ret && suspend)
+			goto fail;
+	}
+
+	hprintk(handle, TRACE, "%s completed\n", name[suspend]);
+	return 0;
+fail:
+	hprintk(handle, ERROR, "%s failed with %d\n", name[suspend], ret);
+	list_for_each_entry_continue_reverse(item, &handle->tree, head) {
+		int rret = nvkm_handle_init(item);
+		if (rret)
+			hprintk(handle, FATAL, "failed to restart, %d\n", rret);
+	}
+
+	return ret;
+}
+
+int
+nvkm_handle_create(struct nvkm_object *parent, u32 _parent, u32 _handle,
+		   struct nvkm_object *object, struct nvkm_handle **phandle)
+{
+	struct nvkm_object *namedb;
+	struct nvkm_handle *handle;
+	int ret;
+
+	namedb = parent;
+	while (!nv_iclass(namedb, NV_NAMEDB_CLASS))
+		namedb = namedb->parent;
+
+	handle = kzalloc(sizeof(*handle), GFP_KERNEL);
+	if (!handle)
+		return -ENOMEM;
+
+	INIT_LIST_HEAD(&handle->head);
+	INIT_LIST_HEAD(&handle->tree);
+	handle->name = _handle;
+	handle->priv = ~0;
+
+	ret = nvkm_namedb_insert(nv_namedb(namedb), _handle, object, handle);
+	if (ret) {
+		kfree(handle);
+		return ret;
+	}
+
+	if (nv_parent(parent)->object_attach) {
+		ret = nv_parent(parent)->object_attach(parent, object, _handle);
+		if (ret < 0) {
+			nvkm_handle_destroy(handle);
+			return ret;
+		}
+
+		handle->priv = ret;
+	}
+
+	if (object != namedb) {
+		while (!nv_iclass(namedb, NV_CLIENT_CLASS))
+			namedb = namedb->parent;
+
+		handle->parent = nvkm_namedb_get(nv_namedb(namedb), _parent);
+		if (handle->parent) {
+			list_add(&handle->head, &handle->parent->tree);
+			nvkm_namedb_put(handle->parent);
+		}
+	}
+
+	hprintk(handle, TRACE, "created\n");
+	*phandle = handle;
+	return 0;
+}
+
+void
+nvkm_handle_destroy(struct nvkm_handle *handle)
+{
+	struct nvkm_handle *item, *temp;
+
+	hprintk(handle, TRACE, "destroy running\n");
+	list_for_each_entry_safe(item, temp, &handle->tree, head) {
+		nvkm_handle_destroy(item);
+	}
+	list_del(&handle->head);
+
+	if (handle->priv != ~0) {
+		struct nvkm_object *parent = handle->parent->object;
+		nv_parent(parent)->object_detach(parent, handle->priv);
+	}
+
+	hprintk(handle, TRACE, "destroy completed\n");
+	nvkm_namedb_remove(handle);
+	kfree(handle);
+}
+
+struct nvkm_object *
+nvkm_handle_ref(struct nvkm_object *parent, u32 name)
+{
+	struct nvkm_object *object = NULL;
+	struct nvkm_handle *handle;
+
+	while (!nv_iclass(parent, NV_NAMEDB_CLASS))
+		parent = parent->parent;
+
+	handle = nvkm_namedb_get(nv_namedb(parent), name);
+	if (handle) {
+		nvkm_object_ref(handle->object, &object);
+		nvkm_namedb_put(handle);
+	}
+
+	return object;
+}
+
+struct nvkm_handle *
+nvkm_handle_get_class(struct nvkm_object *engctx, u16 oclass)
+{
+	struct nvkm_namedb *namedb;
+	if (engctx && (namedb = (void *)nv_pclass(engctx, NV_NAMEDB_CLASS)))
+		return nvkm_namedb_get_class(namedb, oclass);
+	return NULL;
+}
+
+struct nvkm_handle *
+nvkm_handle_get_vinst(struct nvkm_object *engctx, u64 vinst)
+{
+	struct nvkm_namedb *namedb;
+	if (engctx && (namedb = (void *)nv_pclass(engctx, NV_NAMEDB_CLASS)))
+		return nvkm_namedb_get_vinst(namedb, vinst);
+	return NULL;
+}
+
+struct nvkm_handle *
+nvkm_handle_get_cinst(struct nvkm_object *engctx, u32 cinst)
+{
+	struct nvkm_namedb *namedb;
+	if (engctx && (namedb = (void *)nv_pclass(engctx, NV_NAMEDB_CLASS)))
+		return nvkm_namedb_get_cinst(namedb, cinst);
+	return NULL;
+}
+
+void
+nvkm_handle_put(struct nvkm_handle *handle)
+{
+	if (handle)
+		nvkm_namedb_put(handle);
+}