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  #   5€ЖЕ915Дa–Ь4э()Ё‰P@ЉНАЃLZ7яК “    5/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __OF_PCI_H
#define __OF_PCI_H

#include <linux/types.h>
#include <linux/errno.h>

struct pci_dev;
struct device_node;

#if IS_ENABLED(CONFIG_OF) && IS_ENABLED(CONFIG_PCI)
struct device_node *of_pci_find_child_device(struct device_node *parent,
					     unsigned int devfn);
int of_pci_get_devfn(struct device_node *np);
void of_pci_check_probe_only(void);
#else
static inline struct device_node *of_pci_find_child_device(struct device_node *parent,
					     unsigned int devfn)
{
	return NULL;
}

static inline int of_pci_get_devfn(struct device_node *np)
{
	return -EINVAL;
}

static inline void of_pci_check_probe_only(void) { }
#endif

#if IS_ENABLED(CONFIG_OF_IRQ)
int of_irq_parse_and_map_pci(const struct pci_dev *dev, u8 slot, u8 pin);
#else
static inline int
of_irq_parse_and_map_pci(const struct pci_dev *dev, u8 slot, u8 pin)
{
	return 0;
}
#endif

#endif
     7€ЗЖѓlOіЕѕК ­    7/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LINUX_PAGEWALK_H
#define _LINUX_PAGEWALK_H

#include <linux/mm.h>

struct mm_walk;

/* Locking requirement during a page walk. */
enum page_walk_lock {
	/* mmap_lock should be locked for read to stabilize the vma tree */
	PGWALK_RDLOCK = 0,
	/* vma will be write-locked during the walk */
	PGWALK_WRLOCK = 1,
	/* vma is expected to be already write-locked during the walk */
	PGWALK_WRLOCK_VERIFY = 2,
};

/**
 * struct mm_walk_ops - callbacks for walk_page_range
 * @pgd_entry:		if set, called for each non-empty PGD (top-level) entry
 * @p4d_entry:		if set, called for each non-empty P4D entry
 * @pud_entry:		if set, called for each non-empty PUD entry
 * @pmd_entry:		if set, called for each non-empty PMD entry
 *			this handler is required to be able to handle
 *			pmd_trans_huge() pmds.  They may simply choose to
 *			split_huge_page() instead of handling it explicitly.
 * @pte_entry:		if set, called for each PTE (lowest-level) entry,
 *			including empty ones
 * @pte_hole:		if set, called for each hole at all levels,
 *			depth is -1 if not known, 0:PGD, 1:P4D, 2:PUD, 3:PMD.
 *			Any folded depths (where PTRS_PER_P?D is equal to 1)
 *			are skipped.
 * @hugetlb_entry:	if set, called for each hugetlb entry. This hook
 *			function is called with the vma lock held, in order to
 *			protect against a concurrent freeing of the pte_t* or
 *			the ptl. In some cases, the hook function needs to drop
 *			and retake the vma lock in order to avoid deadlocks
 *			while calling other functions. In such cases the hook
 *			function must either refrain from accessing the pte or
 *			ptl after dropping the vma lock, or else revalidate
 *			those items after re-acquiring the vma lock and before
 *			accessing them.
 * @test_walk:		caller specific callback function to determine whether
 *			we walk over the current vma or not. Returning 0 means
 *			"do page table walk over the current vma", returning
 *			a negative value means "abort current page table walk
 *			right now" and returning 1 means "skip the current vma"
 *			Note that this callback is not called when the caller
 *			passes in a single VMA as for walk_page_vma().
 * @pre_vma:            if set, called before starting walk on a non-null vma.
 * @post_vma:           if set, called after a walk on a non-null vma, provided
 *                      that @pre_vma and the vma walk succeeded.
 *
 * p?d_entry callbacks are called even if those levels are folded on a
 * particular architecture/configuration.
 */
struct mm_walk_ops {
	int (*pgd_entry)(pgd_t *pgd, unsigned long addr,
			 unsigned long next, struct mm_walk *walk);
	int (*p4d_entry)(p4d_t *p4d, unsigned long addr,
			 unsigned long next, struct mm_walk *walk);
	int (*pud_entry)(pud_t *pud, unsigned long addr,
			 unsigned long next, struct mm_walk *walk);
	int (*pmd_entry)(pmd_t *pmd, unsigned long addr,
			 unsigned long next, struct mm_walk *walk);
	int (*pte_entry)(pte_t *pte, unsigned long addr,
			 unsigned long next, struct mm_walk *walk);
	int (*pte_