WSL2-Linux-Kernel/include/asm-generic/pci-bridge.h

/*
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version
 * 2 of the License, or (at your option) any later version.
 */
#ifndef _ASM_GENERIC_PCI_BRIDGE_H
#define _ASM_GENERIC_PCI_BRIDGE_H

#ifdef __KERNEL__

enum {
	/* Force re-assigning all resources (ignore firmware
	 * setup completely)
	 */
	PCI_REASSIGN_ALL_RSRC	= 0x00000001,

	/* Re-assign all bus numbers */
	PCI_REASSIGN_ALL_BUS	= 0x00000002,

	/* Do not try to assign, just use existing setup */
	PCI_PROBE_ONLY		= 0x00000004,

	/* Don't bother with ISA alignment unless the bridge has
	 * ISA forwarding enabled
	 */
	PCI_CAN_SKIP_ISA_ALIGN	= 0x00000008,

	/* Enable domain numbers in /proc */
	PCI_ENABLE_PROC_DOMAINS	= 0x00000010,
	/* ... except for domain 0 */
	PCI_COMPAT_DOMAIN_0	= 0x00000020,

	/* PCIe downstream ports are bridges that normally lead to only a
	 * device 0, but if this is set, we scan all possible devices, not
	 * just device 0.
	 */
	PCI_SCAN_ALL_PCIE_DEVS	= 0x00000040,
};

#ifdef CONFIG_PCI
extern unsigned int pci_flags;

static inline void pci_set_flags(int flags)
{
	pci_flags = flags;
}

static inline void pci_add_flags(int flags)
{
	pci_flags |= flags;
}

static inline void pci_clear_flags(int flags)
{
	pci_flags &= ~flags;
}

static inline int pci_has_flag(int flag)
{
	return pci_flags & flag;
}
#else
static inline void pci_set_flags(int flags) { }
static inline void pci_add_flags(int flags) { }
static inline void pci_clear_flags(int flags) { }
static inline int pci_has_flag(int flag)
{
	return 0;
}
#endif	/* CONFIG_PCI */

#endif	/* __KERNEL__ */
#endif	/* _ASM_GENERIC_PCI_BRIDGE_H */