Release 4.14 drivers/vfio/pci/vfio_pci_private.h

/*
 * Copyright (C) 2012 Red Hat, Inc.  All rights reserved.
 *     Author: Alex Williamson <alex.williamson@redhat.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * Derived from original vfio:
 * Copyright 2010 Cisco Systems, Inc.  All rights reserved.
 * Author: Tom Lyon, pugs@cisco.com
 */

#include <linux/mutex.h>
#include <linux/pci.h>
#include <linux/irqbypass.h>
#include <linux/types.h>

#ifndef VFIO_PCI_PRIVATE_H

#define VFIO_PCI_PRIVATE_H


#define VFIO_PCI_OFFSET_SHIFT   40


#define VFIO_PCI_OFFSET_TO_INDEX(off)	(off >> VFIO_PCI_OFFSET_SHIFT)

#define VFIO_PCI_INDEX_TO_OFFSET(index)	((u64)(index) << VFIO_PCI_OFFSET_SHIFT)

#define VFIO_PCI_OFFSET_MASK	(((u64)(1) << VFIO_PCI_OFFSET_SHIFT) - 1)

/* Special capability IDs predefined access */

#define PCI_CAP_ID_INVALID		0xFF	
/* default raw access */

#define PCI_CAP_ID_INVALID_VIRT		0xFE	
/* default virt access */


struct vfio_pci_irq_ctx {
	
struct eventfd_ctx	*trigger;
	
struct virqfd		*unmask;
	
struct virqfd		*mask;
	
char			*name;
	
bool			masked;
	
struct irq_bypass_producer	producer;
};

struct vfio_pci_device;
struct vfio_pci_region;


struct vfio_pci_regops {
	
size_t	(*rw)(struct vfio_pci_device *vdev, char __user *buf,
		      size_t count, loff_t *ppos, bool iswrite);
	
void	(*release)(struct vfio_pci_device *vdev,
			   struct vfio_pci_region *region);
};


struct vfio_pci_region {
	
u32				type;
	
u32				subtype;
	
const struct vfio_pci_regops	*ops;
	
void				*data;
	
size_t				size;
	
u32				flags;
};


struct vfio_pci_dummy_resource {
	
struct resource		resource;
	
int			index;
	
struct list_head	res_next;
};


struct vfio_pci_device {
	
struct pci_dev		*pdev;
	
void __iomem		*barmap[PCI_STD_RESOURCE_END + 1];
	
bool			bar_mmap_supported[PCI_STD_RESOURCE_END + 1];
	
u8			*pci_config_map;
	
u8			*vconfig;
	
struct perm_bits	*msi_perm;
	
spinlock_t		irqlock;
	
struct mutex		igate;
	
struct vfio_pci_irq_ctx	*ctx;
	
int			num_ctx;
	
int			irq_type;
	
int			num_regions;
	
struct vfio_pci_region	*region;
	
u8			msi_qmax;
	
u8			msix_bar;
	
u16			msix_size;
	
u32			msix_offset;
	
u32			rbar[7];
	
bool			pci_2_3;
	
bool			virq_disabled;
	
bool			reset_works;
	
bool			extended_caps;
	
bool			bardirty;
	
bool			has_vga;
	
bool			needs_reset;
	
bool			nointx;
	
struct pci_saved_state	*pci_saved_state;
	
int			refcnt;
	
struct eventfd_ctx	*err_trigger;
	
struct eventfd_ctx	*req_trigger;
	
struct list_head	dummy_resources_list;
};


#define is_intx(vdev) (vdev->irq_type == VFIO_PCI_INTX_IRQ_INDEX)

#define is_msi(vdev) (vdev->irq_type == VFIO_PCI_MSI_IRQ_INDEX)

#define is_msix(vdev) (vdev->irq_type == VFIO_PCI_MSIX_IRQ_INDEX)

#define is_irq_none(vdev) (!(is_intx(vdev) || is_msi(vdev) || is_msix(vdev)))

#define irq_is(vdev, type) (vdev->irq_type == type)

extern void vfio_pci_intx_mask(struct vfio_pci_device *vdev);
extern void vfio_pci_intx_unmask(struct vfio_pci_device *vdev);

extern int vfio_pci_set_irqs_ioctl(struct vfio_pci_device *vdev,
				   uint32_t flags, unsigned index,
				   unsigned start, unsigned count, void *data);

extern ssize_t vfio_pci_config_rw(struct vfio_pci_device *vdev,
				  char __user *buf, size_t count,
				  loff_t *ppos, bool iswrite);

extern ssize_t vfio_pci_bar_rw(struct vfio_pci_device *vdev, char __user *buf,
			       size_t count, loff_t *ppos, bool iswrite);

extern ssize_t vfio_pci_vga_rw(struct vfio_pci_device *vdev, char __user *buf,
			       size_t count, loff_t *ppos, bool iswrite);

extern int vfio_pci_init_perm_bits(void);
extern void vfio_pci_uninit_perm_bits(void);

extern int vfio_config_init(struct vfio_pci_device *vdev);
extern void vfio_config_free(struct vfio_pci_device *vdev);

extern int vfio_pci_register_dev_region(struct vfio_pci_device *vdev,
					unsigned int type, unsigned int subtype,
					const struct vfio_pci_regops *ops,
					size_t size, u32 flags, void *data);
#ifdef CONFIG_VFIO_PCI_IGD
extern int vfio_pci_igd_init(struct vfio_pci_device *vdev);
#else


static inline int vfio_pci_igd_init(struct vfio_pci_device *vdev)
{
	return -ENODEV;
}
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#endif
#endif /* VFIO_PCI_PRIVATE_H */
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Directory: drivers/vfio/pci

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