#define _LINUX_IO_MAPPING_H
#include <linux/types.h>
+#include <linux/slab.h>
#include <asm/io.h>
#include <asm/page.h>
#include <asm/iomap.h>
io_mapping_create_wc(resource_size_t base, unsigned long size)
{
struct io_mapping *iomap;
-
- if (!is_io_mapping_possible(base, size))
- return NULL;
+ pgprot_t prot;
iomap = kmalloc(sizeof(*iomap), GFP_KERNEL);
if (!iomap)
- return NULL;
+ goto out_err;
+
+ if (iomap_create_wc(base, size, &prot))
+ goto out_free;
iomap->base = base;
iomap->size = size;
- iomap->prot = pgprot_writecombine(__pgprot(__PAGE_KERNEL));
+ iomap->prot = prot;
return iomap;
+
+out_free:
+ kfree(iomap);
+out_err:
+ return NULL;
}
static inline void
io_mapping_free(struct io_mapping *mapping)
{
+ iomap_free(mapping->base, mapping->size);
kfree(mapping);
}
static inline void *
io_mapping_map_wc(struct io_mapping *mapping, unsigned long offset)
{
+ resource_size_t phys_addr;
+
BUG_ON(offset >= mapping->size);
- resource_size_t phys_addr = mapping->base + offset;
+ phys_addr = mapping->base + offset;
+
return ioremap_wc(phys_addr, PAGE_SIZE);
}