swiotlb: move global variables into a new io_tlb_mem structure

static int

xen_swiotlb_dma_supported(struct device *hwdev, u64 mask)

{

	return xen_phys_to_dma(hwdev, io_tlb_end - 1) <= mask;

	return xen_phys_to_dma(hwdev, io_tlb_default_mem.end - 1) <= mask;

}

const struct dma_map_ops xen_swiotlb_dma_ops = {

#include <linux/init.h>

#include <linux/types.h>

#include <linux/limits.h>

#include <linux/spinlock.h>

struct device;

struct page;

#ifdef CONFIG_SWIOTLB

extern enum swiotlb_force swiotlb_force;

extern phys_addr_t io_tlb_start, io_tlb_end;

/**

 * struct io_tlb_mem - IO TLB Memory Pool Descriptor

 *

 * @start:	The start address of the swiotlb memory pool. Used to do a quick

 *		range check to see if the memory was in fact allocated by this

 *		API.

 * @end:	The end address of the swiotlb memory pool. Used to do a quick

 *		range check to see if the memory was in fact allocated by this

 *		API.

 * @nslabs:	The number of IO TLB blocks (in groups of 64) between @start and

 *		@end. This is command line adjustable via setup_io_tlb_npages.

 * @used:	The number of used IO TLB block.

 * @list:	The free list describing the number of free entries available

 *		from each index.

 * @index:	The index to start searching in the next round.

 * @orig_addr:	The original address corresponding to a mapped entry.

 * @alloc_size:	Size of the allocated buffer.

 * @lock:	The lock to protect the above data structures in the map and

 *		unmap calls.

 * @debugfs:	The dentry to debugfs.

 * @late_alloc:	%true if allocated using the page allocator

 */

struct io_tlb_mem {

	phys_addr_t start;

	phys_addr_t end;

	unsigned long nslabs;

	unsigned long used;

	unsigned int *list;

	unsigned int index;

	phys_addr_t *orig_addr;

	size_t *alloc_size;

	spinlock_t lock;

	struct dentry *debugfs;

	bool late_alloc;

};

extern struct io_tlb_mem io_tlb_default_mem;

static inline bool is_swiotlb_buffer(phys_addr_t paddr)

{

	return paddr >= io_tlb_start && paddr < io_tlb_end;

	struct io_tlb_mem *mem = &io_tlb_default_mem;

	return paddr >= mem->start && paddr < mem->end;

}

void __init swiotlb_exit(void);