[linux-2.6-block.git] / 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_device {
	struct pci_dev		*pdev;
	void __iomem		*barmap[PCI_STD_RESOURCE_END + 1];
	u8			*pci_config_map;
	u8			*vconfig;
	struct perm_bits	*msi_perm;
	spinlock_t		irqlock;
	struct mutex		igate;
	struct msix_entry	*msix;
	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;
	struct pci_saved_state	*pci_saved_state;
	int			refcnt;
	struct eventfd_ctx	*err_trigger;
	struct eventfd_ctx	*req_trigger;
};

#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;
}
#endif
#endif /* VFIO_PCI_PRIVATE_H */
Commit	Line	Data
89e1f7d4 AW	1	/*
	2	* Copyright (C) 2012 Red Hat, Inc. All rights reserved.
	3	* Author: Alex Williamson <alex.williamson@redhat.com>
	4	*
	5	* This program is free software; you can redistribute it and/or modify
	6	* it under the terms of the GNU General Public License version 2 as
	7	* published by the Free Software Foundation.
	8	*
	9	* Derived from original vfio:
	10	* Copyright 2010 Cisco Systems, Inc. All rights reserved.
	11	* Author: Tom Lyon, pugs@cisco.com
	12	*/
	13
	14	#include <linux/mutex.h>
	15	#include <linux/pci.h>
6d7425f1	16	#include <linux/irqbypass.h>
28541d41	17	#include <linux/types.h>
89e1f7d4 AW	18
	19	#ifndef VFIO_PCI_PRIVATE_H
	20	#define VFIO_PCI_PRIVATE_H
	21
	22	#define VFIO_PCI_OFFSET_SHIFT 40
	23
	24	#define VFIO_PCI_OFFSET_TO_INDEX(off) (off >> VFIO_PCI_OFFSET_SHIFT)
	25	#define VFIO_PCI_INDEX_TO_OFFSET(index) ((u64)(index) << VFIO_PCI_OFFSET_SHIFT)
	26	#define VFIO_PCI_OFFSET_MASK (((u64)(1) << VFIO_PCI_OFFSET_SHIFT) - 1)
	27
345d7104 AW	28	/* Special capability IDs predefined access */
	29	#define PCI_CAP_ID_INVALID 0xFF /* default raw access */
	30	#define PCI_CAP_ID_INVALID_VIRT 0xFE /* default virt access */
	31
89e1f7d4 AW	32	struct vfio_pci_irq_ctx {
	33	struct eventfd_ctx *trigger;
	34	struct virqfd *unmask;
	35	struct virqfd *mask;
	36	char *name;
	37	bool masked;
6d7425f1	38	struct irq_bypass_producer producer;
89e1f7d4 AW	39	};
89e1f7d4 AW	40
28541d41 AW	41	struct vfio_pci_device;
	42	struct vfio_pci_region;
	43
	44	struct vfio_pci_regops {
	45	size_t (rw)(struct vfio_pci_device vdev, char __user *buf,
	46	size_t count, loff_t *ppos, bool iswrite);
	47	void (release)(struct vfio_pci_device vdev,
	48	struct vfio_pci_region *region);
	49	};
	50
	51	struct vfio_pci_region {
	52	u32 type;
	53	u32 subtype;
	54	const struct vfio_pci_regops *ops;
	55	void *data;
	56	size_t size;
	57	u32 flags;
	58	};
	59
89e1f7d4 AW	60	struct vfio_pci_device {
	61	struct pci_dev *pdev;
	62	void __iomem *barmap[PCI_STD_RESOURCE_END + 1];
	63	u8 *pci_config_map;
	64	u8 *vconfig;
	65	struct perm_bits *msi_perm;
	66	spinlock_t irqlock;
	67	struct mutex igate;
	68	struct msix_entry *msix;
	69	struct vfio_pci_irq_ctx *ctx;
	70	int num_ctx;
	71	int irq_type;
28541d41 AW	72	int num_regions;
28541d41 AW	73	struct vfio_pci_region *region;
89e1f7d4 AW	74	u8 msi_qmax;
	75	u8 msix_bar;
	76	u16 msix_size;
	77	u32 msix_offset;
	78	u32 rbar[7];
	79	bool pci_2_3;
	80	bool virq_disabled;
	81	bool reset_works;
	82	bool extended_caps;
	83	bool bardirty;
84237a82	84	bool has_vga;
bc4fba77	85	bool needs_reset;
89e1f7d4	86	struct pci_saved_state *pci_saved_state;
61d79256	87	int refcnt;
dad9f897	88	struct eventfd_ctx *err_trigger;
6140a8f5	89	struct eventfd_ctx *req_trigger;
89e1f7d4 AW	90	};
	91
	92	#define is_intx(vdev) (vdev->irq_type == VFIO_PCI_INTX_IRQ_INDEX)
	93	#define is_msi(vdev) (vdev->irq_type == VFIO_PCI_MSI_IRQ_INDEX)
	94	#define is_msix(vdev) (vdev->irq_type == VFIO_PCI_MSIX_IRQ_INDEX)
	95	#define is_irq_none(vdev) (!(is_intx(vdev) \|\| is_msi(vdev) \|\| is_msix(vdev)))
	96	#define irq_is(vdev, type) (vdev->irq_type == type)
	97
	98	extern void vfio_pci_intx_mask(struct vfio_pci_device *vdev);
	99	extern void vfio_pci_intx_unmask(struct vfio_pci_device *vdev);
	100
	101	extern int vfio_pci_set_irqs_ioctl(struct vfio_pci_device *vdev,
	102	uint32_t flags, unsigned index,
	103	unsigned start, unsigned count, void *data);
	104
906ee99d AW	105	extern ssize_t vfio_pci_config_rw(struct vfio_pci_device *vdev,
	106	char __user *buf, size_t count,
	107	loff_t *ppos, bool iswrite);
	108
	109	extern ssize_t vfio_pci_bar_rw(struct vfio_pci_device vdev, char __user buf,
	110	size_t count, loff_t *ppos, bool iswrite);
89e1f7d4	111
84237a82 AW	112	extern ssize_t vfio_pci_vga_rw(struct vfio_pci_device vdev, char __user buf,
	113	size_t count, loff_t *ppos, bool iswrite);
	114
89e1f7d4 AW	115	extern int vfio_pci_init_perm_bits(void);
	116	extern void vfio_pci_uninit_perm_bits(void);
	117
89e1f7d4 AW	118	extern int vfio_config_init(struct vfio_pci_device *vdev);
89e1f7d4 AW	119	extern void vfio_config_free(struct vfio_pci_device *vdev);
28541d41 AW	120
	121	extern int vfio_pci_register_dev_region(struct vfio_pci_device *vdev,
	122	unsigned int type, unsigned int subtype,
	123	const struct vfio_pci_regops *ops,
	124	size_t size, u32 flags, void *data);
5846ff54	125	#ifdef CONFIG_VFIO_PCI_IGD
f572a960	126	extern int vfio_pci_igd_init(struct vfio_pci_device *vdev);
5846ff54	127	#else
f572a960	128	static inline int vfio_pci_igd_init(struct vfio_pci_device *vdev)
5846ff54 AW	129	{
	130	return -ENODEV;
	131	}
	132	#endif
89e1f7d4	133	#endif /* VFIO_PCI_PRIVATE_H */