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  #   ˆl–äY>”TÔD¨ 	Årã`SÿÁƒyöƒÀÃÅ "í    /* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LINUX_VMALLOC_H
#define _LINUX_VMALLOC_H

#include <linux/spinlock.h>
#include <linux/init.h>
#include <linux/list.h>
#include <linux/llist.h>
#include <asm/page.h>		/* pgprot_t */
#include <linux/rbtree.h>
#include <linux/overflow.h>

#include <asm/vmalloc.h>

struct vm_area_struct;		/* vma defining user mapping in mm_types.h */
struct notifier_block;		/* in notifier.h */
struct iov_iter;		/* in uio.h */

/* bits in flags of vmalloc's vm_struct below */
#define VM_IOREMAP		0x00000001	/* ioremap() and friends */
#define VM_ALLOC		0x00000002	/* vmalloc() */
#define VM_MAP			0x00000004	/* vmap()ed pages */
#define VM_USERMAP		0x00000008	/* suitable for remap_vmalloc_range */
#define VM_DMA_COHERENT		0x00000010	/* dma_alloc_coherent */
#define VM_UNINITIALIZED	0x00000020	/* vm_struct is not fully initialized */
#define VM_NO_GUARD		0x00000040      /* ***DANGEROUS*** don't add guard page */
#define VM_KASAN		0x00000080      /* has allocated kasan shadow memory */
#define VM_FLUSH_RESET_PERMS	0x00000100	/* reset direct map and flush TLB on unmap, can't be freed in atomic context */
#define VM_MAP_PUT_PAGES	0x00000200	/* put pages and free array in vfree */
#define VM_ALLOW_HUGE_VMAP	0x00000400      /* Allow for huge pages on archs with HAVE_ARCH_HUGE_VMALLOC */

#if (defined(CONFIG_KASAN_GENERIC) || defined(CONFIG_KASAN_SW_TAGS)) && \
	!defined(CONFIG_KASAN_VMALLOC)
#define VM_DEFER_KMEMLEAK	0x00000800	/* defer kmemleak object creation */
#else
#define VM_DEFER_KMEMLEAK	0
#endif
#define VM_SPARSE		0x00001000	/* sparse vm_area. not all pages are present. */

/* bits [20..32] reserved for arch specific ioremap internals */

/*
 * Maximum alignment for ioremap() regions.
 * Can be overridden by arch-specific value.
 */
#ifndef IOREMAP_MAX_ORDER
#define IOREMAP_MAX_ORDER	(7 + PAGE_SHIFT)	/* 128 pages */
#endif

struct vm_struct {
	struct vm_struct	*next;
	void			*addr;
	unsigned long		size;
	unsigned long		flags;
	struct page		**pages;
#ifdef CONFIG_HAVE_ARCH_HUGE_VMALLOC
	unsigned int		page_order;
#endif
	unsigned int		nr_pages;
	phys_addr_t		phys_addr;
	const void		*caller;
};

struct vmap_area {
	unsigned long va_start;
	unsigned long va_end;

	struct rb_node rb_node;         /* address sorted rbtree */
	struct list_head list;          /* address sorted list */

	/*
	 * The following two variables can be packed, because
	 * a vmap_area object can be either:
	 *    1) in "free" tree (root is free_vmap_area_root)
	 *    2) or "busy" tree (root is vmap_area_root)
	 */
	union {
		unsigned long subtree_max_size; /* in "free" tree */
		struct vm_struct *vm;           /* in "busy" tree */
	};
	unsigned long flags; /* mark type of vm_map_ram area */
};

/* archs that select HAVE_ARCH_HUGE_VMAP should override one or more of these */
#ifndef arch_vmap_p4d_supported
static inline bool arch_vmap_p4d_supported(pgprot_t prot)
{
	return false;
}
#endif

#ifndef arch_vmap_pud_supported
static inline bool arch_vmap_pud_supported(pgprot_t prot)
{
	return false;
}
#endif

#ifndef arch_vmap_pmd_supported
static inline bool arch_vmap_pmd_supported(pgprot_t prot)
{
	return false;
}
#endif

#ifndef arch_vmap_pte_range_map_size
static inline unsigned long arch_vmap_pte_range_map_size(unsigned long addr, unsigned long end,
							 u64 pfn, unsigned int max_page_shift)
{
	return PAGE_SIZE;
}
#endif

#ifndef arch_vmap_pte_supported_shift
static inline int arch_vmap_pte_supported_shift(unsigned long size)
{
	return PAGE_SHIFT;
}
#endif

#ifndef arch_vmap_pgprot_tagged
static inline pgprot_t arch_vmap_pgprot_tagged(pgprot_t prot)
{
	return prot;
}
#endif

/*
 *	Highlevel APIs for driver use
 */
extern void vm_unmap_ram(const void *mem, unsigned int count);
extern void *vm_map_ram(struct page **pages, unsigned int count, int node);
extern void vm_unmap_aliases(void);

#ifdef CONFIG_MMU
extern unsigned long vmalloc_nr_pages(void);
#else
static inline unsigned long vmalloc_nr_pages(void) { return 0; }
#endif

extern void *vmalloc(unsigned long siz