Linux has support for resource_lists. These are for collecting resources
along with a translation offset on a list. Copy it over to barebox for
use in our pci support.
Signed-off-by: Sascha Hauer <s.hauer@xxxxxxxxxxxxxx>
---
common/resource.c | 16 +++++++
include/linux/resource_ext.h | 81 ++++++++++++++++++++++++++++++++++++
2 files changed, 97 insertions(+)
create mode 100644 include/linux/resource_ext.h
diff --git a/common/resource.c b/common/resource.c
index 8678609229..76f19de494 100644
--- a/common/resource.c
+++ b/common/resource.c
@@ -10,6 +10,7 @@
#include <init.h>
#include <linux/ioport.h>
#include <linux/err.h>
+#include <linux/resource_ext.h>
#include <asm/io.h>
static int init_resource(struct resource *res, const char *name)
@@ -164,3 +165,18 @@ struct resource *request_ioport_region(const char *name,
return res;
}
+
+struct resource_entry *resource_list_create_entry(struct resource *res,
+ size_t extra_size)
+{
+ struct resource_entry *entry;
+
+ entry = kzalloc(sizeof(*entry) + extra_size, GFP_KERNEL);
+ if (entry) {
+ INIT_LIST_HEAD(&entry->node);
+ entry->res = res ? res : &entry->__res;
+ }
+
+ return entry;
+}
+EXPORT_SYMBOL(resource_list_create_entry);
diff --git a/include/linux/resource_ext.h b/include/linux/resource_ext.h
new file mode 100644
index 0000000000..ff0339df56
--- /dev/null
+++ b/include/linux/resource_ext.h
@@ -0,0 +1,81 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2015, Intel Corporation
+ * Author: Jiang Liu <jiang.liu@xxxxxxxxxxxxxxx>
+ */
+#ifndef _LINUX_RESOURCE_EXT_H
+#define _LINUX_RESOURCE_EXT_H
+#include <linux/types.h>
+#include <linux/list.h>
+#include <linux/ioport.h>
+#include <linux/slab.h>
+
+/* Represent resource window for bridge devices */
+struct resource_win {
+ struct resource res; /* In master (CPU) address space */
+ resource_size_t offset; /* Translation offset for bridge */
+};
+
+/*
+ * Common resource list management data structure and interfaces to support
+ * ACPI, PNP and PCI host bridge etc.
+ */
+struct resource_entry {
+ struct list_head node;
+ struct resource *res; /* In master (CPU) address space */
+ resource_size_t offset; /* Translation offset for bridge */
+ struct resource __res; /* Default storage for res */
+};
+
+extern struct resource_entry *
+resource_list_create_entry(struct resource *res, size_t extra_size);
+extern void resource_list_free(struct list_head *head);
+
+static inline void resource_list_add(struct resource_entry *entry,
+ struct list_head *head)
+{
+ list_add(&entry->node, head);
+}
+
+static inline void resource_list_add_tail(struct resource_entry *entry,
+ struct list_head *head)
+{
+ list_add_tail(&entry->node, head);
+}
+
+static inline void resource_list_del(struct resource_entry *entry)
+{
+ list_del(&entry->node);
+}
+
+static inline void resource_list_free_entry(struct resource_entry *entry)
+{
+ kfree(entry);
+}
+
+static inline void
+resource_list_destroy_entry(struct resource_entry *entry)
+{
+ resource_list_del(entry);
+ resource_list_free_entry(entry);
+}
+
+#define resource_list_for_each_entry(entry, list) \
+ list_for_each_entry((entry), (list), node)
+
+#define resource_list_for_each_entry_safe(entry, tmp, list) \
+ list_for_each_entry_safe((entry), (tmp), (list), node)
+
+static inline struct resource_entry *
+resource_list_first_type(struct list_head *list, unsigned long type)
+{
+ struct resource_entry *entry;
+
+ resource_list_for_each_entry(entry, list) {
+ if (resource_type(entry->res) == type)
+ return entry;
+ }
+ return NULL;
+}
+
+#endif /* _LINUX_RESOURCE_EXT_H */
--
2.39.2
