
     ˆÀÄƒŽ?¿ÂÁ …    /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
/*
 *  linux/include/linux/nfs_fs.h
 *
 *  Copyright (C) 1992  Rick Sladkey
 *
 *  OS-specific nfs filesystem definitions and declarations
 */

#ifndef _UAPI_LINUX_NFS_FS_H
#define _UAPI_LINUX_NFS_FS_H

#include <linux/magic.h>

/* Default timeout values */
#define NFS_DEF_UDP_TIMEO	(11)
#define NFS_DEF_UDP_RETRANS	(3)
#define NFS_DEF_TCP_TIMEO	(600)
#define NFS_DEF_TCP_RETRANS	(2)

#define NFS_MAX_UDP_TIMEOUT	(60*HZ)
#define NFS_MAX_TCP_TIMEOUT	(600*HZ)

#define NFS_DEF_ACREGMIN	(3)
#define NFS_DEF_ACREGMAX	(60)
#define NFS_DEF_ACDIRMIN	(30)
#define NFS_DEF_ACDIRMAX	(60)

/*
 * When flushing a cluster of dirty pages, there can be different
 * strategies:
 */
#define FLUSH_SYNC		1	/* file being synced, or contention */
#define FLUSH_STABLE		4	/* commit to stable storage */
#define FLUSH_LOWPRI		8	/* low priority background flush */
#define FLUSH_HIGHPRI		16	/* high priority memory reclaim flush */
#define FLUSH_COND_STABLE	32	/* conditional stable write - only stable
					 * if everything fits in one RPC */


/*
 * NFS debug flags
 */
#define NFSDBG_VFS		0x0001
#define NFSDBG_DIRCACHE		0x0002
#define NFSDBG_LOOKUPCACHE	0x0004
#define NFSDBG_PAGECACHE	0x0008
#define NFSDBG_PROC		0x0010
#define NFSDBG_XDR		0x0020
#define NFSDBG_FILE		0x0040
#define NFSDBG_ROOT		0x0080
#define NFSDBG_CALLBACK		0x0100
#define NFSDBG_CLIENT		0x0200
#define NFSDBG_MOUNT		0x0400
#define NFSDBG_FSCACHE		0x0800 /* unused */
#define NFSDBG_PNFS		0x1000
#define NFSDBG_PNFS_LD		0x2000
#define NFSDBG_STATE		0x4000
#define NFSDBG_XATTRCACHE	0x8000
#define NFSDBG_ALL		0xFFFF


#endif /* _UAPI_LINUX_NFS_FS_H */
     	ˆÀÄƒiÖÝ¿ÂÁ •    	/* SPDX-License-Identifier: GPL-2.0-only */
/*
 * Copyright Â© 2008 Keith Packard <keithp@keithp.com>
 */

#ifndef _LINUX_IO_MAPPING_H
#define _LINUX_IO_MAPPING_H

#include <linux/types.h>
#include <linux/slab.h>
#include <linux/bug.h>
#include <linux/io.h>
#include <linux/pgtable.h>
#include <asm/page.h>

/*
 * The io_mapping mechanism provides an abstraction for mapping
 * individual pages from an io device to the CPU in an efficient fashion.
 *
 * See Documentation/driver-api/io-mapping.rst
 */

struct io_mapping {
	resource_size_t base;
	unsigned long size;
	pgprot_t prot;
	void __iomem *iomem;
};

#ifdef CONFIG_HAVE_ATOMIC_IOMAP

#include <linux/pfn.h>
#include <asm/iomap.h>
/*
 * For small address space machines, mapping large objects
 * into the kernel virtual space isn't practical. Where
 * available, use fixmap support to dynamically map pages
 * of the object at run time.
 */

static inline struct io_mapping *
io_mapping_init_wc(struct io_mapping *iomap,
		   resource_size_t base,
		   unsigned long size)
{
	pgprot_t prot;

	if (iomap_create_wc(base, size, &prot))
		return NULL;

	iomap->base = base;
	iomap->size = size;
	iomap->prot = prot;
	return iomap;
}

static inline void
io_mapping_fini(struct io_mapping *mapping)
{
	iomap_free(mapping->base, mapping->size);
}

/* Atomic map/unmap */
static inline void __iomem *
io_mapping_map_atomic_wc(struct io_mapping *mapping,
			 unsigned long offset)
{
	resource_size_t phys_addr;

	BUG_ON(offset >= mapping->size);
	phys_addr = mapping->base + offset;
	preempt_disable();
	pagefault_disable();
	return __iomap_local_pfn_prot(PHYS_PFN(phys_addr), mapping->prot);
}

static inline void
io_mapping_unmap_atomic(void __iomem *vaddr)
{
	kunmap_local_indexed((void __force *)vaddr);
	pagefault_enable();
	preempt_enable();
}

static inline void __iomem *
io_mapping_map_local_wc(struct io_mapping *mapping, unsigned long offset)
{
	resource_size_t phys_addr;

	BUG_ON(offset >= mapping->size);
	phys_addr = mapping->base + offset;
	return __iomap_local_pfn_prot(PHYS_PFN(phys_addr), mapping->prot);
}

static inline void io_mapping_unmap_local(void __iomem *vaddr)
{
	kunmap_local_indexed((void __force *)vaddr);
}

static inline void __iomem *
io_mapping_map_wc(struct io_mapping *mapping,
		  unsigned long offset,
		  unsigned long size)
{
	resource_size_t phys_addr;

	BUG_ON(offset >= ma