[linux-block.git] / include / linux / vfio_pci_core.h

/* SPDX-License-Identifier: GPL-2.0-only */
/*
 * Copyright (C) 2012 Red Hat, Inc.  All rights reserved.
 *     Author: Alex Williamson <alex.williamson@redhat.com>
 *
 * 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/vfio.h>
#include <linux/irqbypass.h>
#include <linux/types.h>
#include <linux/uuid.h>
#include <linux/notifier.h>

#ifndef VFIO_PCI_CORE_H
#define VFIO_PCI_CORE_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)

struct vfio_pci_core_device;
struct vfio_pci_region;

struct vfio_pci_regops {
	ssize_t (*rw)(struct vfio_pci_core_device *vdev, char __user *buf,
		      size_t count, loff_t *ppos, bool iswrite);
	void	(*release)(struct vfio_pci_core_device *vdev,
			   struct vfio_pci_region *region);
	int	(*mmap)(struct vfio_pci_core_device *vdev,
			struct vfio_pci_region *region,
			struct vm_area_struct *vma);
	int	(*add_capability)(struct vfio_pci_core_device *vdev,
				  struct vfio_pci_region *region,
				  struct vfio_info_cap *caps);
};

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

struct vfio_pci_core_device {
	struct vfio_device	vdev;
	struct pci_dev		*pdev;
	void __iomem		*barmap[PCI_STD_NUM_BARS];
	bool			bar_mmap_supported[PCI_STD_NUM_BARS];
	u8			*pci_config_map;
	u8			*vconfig;
	struct perm_bits	*msi_perm;
	spinlock_t		irqlock;
	struct mutex		igate;
	struct xarray		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			has_dyn_msix:1;
	bool			pci_2_3:1;
	bool			virq_disabled:1;
	bool			reset_works:1;
	bool			extended_caps:1;
	bool			bardirty:1;
	bool			has_vga:1;
	bool			needs_reset:1;
	bool			nointx:1;
	bool			needs_pm_restore:1;
	bool			pm_intx_masked:1;
	bool			pm_runtime_engaged:1;
	struct pci_saved_state	*pci_saved_state;
	struct pci_saved_state	*pm_save;
	int			ioeventfds_nr;
	struct eventfd_ctx	*err_trigger;
	struct eventfd_ctx	*req_trigger;
	struct eventfd_ctx	*pm_wake_eventfd_ctx;
	struct list_head	dummy_resources_list;
	struct mutex		ioeventfds_lock;
	struct list_head	ioeventfds_list;
	struct vfio_pci_vf_token	*vf_token;
	struct list_head		sriov_pfs_item;
	struct vfio_pci_core_device	*sriov_pf_core_dev;
	struct notifier_block	nb;
	struct rw_semaphore	memory_lock;
};

/* Will be exported for vfio pci drivers usage */
int vfio_pci_core_register_dev_region(struct vfio_pci_core_device *vdev,
				      unsigned int type, unsigned int subtype,
				      const struct vfio_pci_regops *ops,
				      size_t size, u32 flags, void *data);
void vfio_pci_core_set_params(bool nointxmask, bool is_disable_vga,
			      bool is_disable_idle_d3);
void vfio_pci_core_close_device(struct vfio_device *core_vdev);
int vfio_pci_core_init_dev(struct vfio_device *core_vdev);
void vfio_pci_core_release_dev(struct vfio_device *core_vdev);
int vfio_pci_core_register_device(struct vfio_pci_core_device *vdev);
void vfio_pci_core_unregister_device(struct vfio_pci_core_device *vdev);
extern const struct pci_error_handlers vfio_pci_core_err_handlers;
int vfio_pci_core_sriov_configure(struct vfio_pci_core_device *vdev,
				  int nr_virtfn);
long vfio_pci_core_ioctl(struct vfio_device *core_vdev, unsigned int cmd,
		unsigned long arg);
int vfio_pci_core_ioctl_feature(struct vfio_device *device, u32 flags,
				void __user *arg, size_t argsz);
ssize_t vfio_pci_core_read(struct vfio_device *core_vdev, char __user *buf,
		size_t count, loff_t *ppos);
ssize_t vfio_pci_core_write(struct vfio_device *core_vdev, const char __user *buf,
		size_t count, loff_t *ppos);
int vfio_pci_core_mmap(struct vfio_device *core_vdev, struct vm_area_struct *vma);
void vfio_pci_core_request(struct vfio_device *core_vdev, unsigned int count);
int vfio_pci_core_match(struct vfio_device *core_vdev, char *buf);
int vfio_pci_core_enable(struct vfio_pci_core_device *vdev);
void vfio_pci_core_disable(struct vfio_pci_core_device *vdev);
void vfio_pci_core_finish_enable(struct vfio_pci_core_device *vdev);
int vfio_pci_core_setup_barmap(struct vfio_pci_core_device *vdev, int bar);
pci_ers_result_t vfio_pci_core_aer_err_detected(struct pci_dev *pdev,
						pci_channel_state_t state);
ssize_t vfio_pci_core_do_io_rw(struct vfio_pci_core_device *vdev, bool test_mem,
			       void __iomem *io, char __user *buf,
			       loff_t off, size_t count, size_t x_start,
			       size_t x_end, bool iswrite);
bool vfio_pci_core_range_intersect_range(loff_t buf_start, size_t buf_cnt,
					 loff_t reg_start, size_t reg_cnt,
					 loff_t *buf_offset,
					 size_t *intersect_count,
					 size_t *register_offset);
#define VFIO_IOWRITE_DECLARATION(size) \
int vfio_pci_core_iowrite##size(struct vfio_pci_core_device *vdev,	\
			bool test_mem, u##size val, void __iomem *io);

VFIO_IOWRITE_DECLARATION(8)
VFIO_IOWRITE_DECLARATION(16)
VFIO_IOWRITE_DECLARATION(32)
#ifdef iowrite64
VFIO_IOWRITE_DECLARATION(64)
#endif

#define VFIO_IOREAD_DECLARATION(size) \
int vfio_pci_core_ioread##size(struct vfio_pci_core_device *vdev,	\
			bool test_mem, u##size *val, void __iomem *io);

VFIO_IOREAD_DECLARATION(8)
VFIO_IOREAD_DECLARATION(16)
VFIO_IOREAD_DECLARATION(32)
#ifdef ioread64
VFIO_IOREAD_DECLARATION(64)
#endif

#endif /* VFIO_PCI_CORE_H */
Commit	Line	Data
	1	/* SPDX-License-Identifier: GPL-2.0-only */
	2	/*
	3	* Copyright (C) 2012 Red Hat, Inc. All rights reserved.
	4	* Author: Alex Williamson <alex.williamson@redhat.com>
	5	*
	6	* Derived from original vfio:
	7	* Copyright 2010 Cisco Systems, Inc. All rights reserved.
	8	* Author: Tom Lyon, pugs@cisco.com
	9	*/
	10
	11	#include <linux/mutex.h>
	12	#include <linux/pci.h>
	13	#include <linux/vfio.h>
	14	#include <linux/irqbypass.h>
	15	#include <linux/types.h>
	16	#include <linux/uuid.h>
	17	#include <linux/notifier.h>
	18
	19	#ifndef VFIO_PCI_CORE_H
	20	#define VFIO_PCI_CORE_H
	21
	22	#define VFIO_PCI_OFFSET_SHIFT 40
	23	#define VFIO_PCI_OFFSET_TO_INDEX(off) (off >> VFIO_PCI_OFFSET_SHIFT)
	24	#define VFIO_PCI_INDEX_TO_OFFSET(index) ((u64)(index) << VFIO_PCI_OFFSET_SHIFT)
	25	#define VFIO_PCI_OFFSET_MASK (((u64)(1) << VFIO_PCI_OFFSET_SHIFT) - 1)
	26
	27	struct vfio_pci_core_device;
	28	struct vfio_pci_region;
	29
	30	struct vfio_pci_regops {
	31	ssize_t (rw)(struct vfio_pci_core_device vdev, char __user *buf,
	32	size_t count, loff_t *ppos, bool iswrite);
	33	void (release)(struct vfio_pci_core_device vdev,
	34	struct vfio_pci_region *region);
	35	int (mmap)(struct vfio_pci_core_device vdev,
	36	struct vfio_pci_region *region,
	37	struct vm_area_struct *vma);
	38	int (add_capability)(struct vfio_pci_core_device vdev,
	39	struct vfio_pci_region *region,
	40	struct vfio_info_cap *caps);
	41	};
	42
	43	struct vfio_pci_region {
	44	u32 type;
	45	u32 subtype;
	46	const struct vfio_pci_regops *ops;
	47	void *data;
	48	size_t size;
	49	u32 flags;
	50	};
	51
	52	struct vfio_pci_core_device {
	53	struct vfio_device vdev;
	54	struct pci_dev *pdev;
	55	void __iomem *barmap[PCI_STD_NUM_BARS];
	56	bool bar_mmap_supported[PCI_STD_NUM_BARS];
	57	u8 *pci_config_map;
	58	u8 *vconfig;
	59	struct perm_bits *msi_perm;
	60	spinlock_t irqlock;
	61	struct mutex igate;
	62	struct xarray ctx;
	63	int irq_type;
	64	int num_regions;
	65	struct vfio_pci_region *region;
	66	u8 msi_qmax;
	67	u8 msix_bar;
	68	u16 msix_size;
	69	u32 msix_offset;
	70	u32 rbar[7];
	71	bool has_dyn_msix:1;
	72	bool pci_2_3:1;
	73	bool virq_disabled:1;
	74	bool reset_works:1;
	75	bool extended_caps:1;
	76	bool bardirty:1;
	77	bool has_vga:1;
	78	bool needs_reset:1;
	79	bool nointx:1;
	80	bool needs_pm_restore:1;
	81	bool pm_intx_masked:1;
	82	bool pm_runtime_engaged:1;
	83	struct pci_saved_state *pci_saved_state;
	84	struct pci_saved_state *pm_save;
	85	int ioeventfds_nr;
	86	struct eventfd_ctx *err_trigger;
	87	struct eventfd_ctx *req_trigger;
	88	struct eventfd_ctx *pm_wake_eventfd_ctx;
	89	struct list_head dummy_resources_list;
	90	struct mutex ioeventfds_lock;
	91	struct list_head ioeventfds_list;
	92	struct vfio_pci_vf_token *vf_token;
	93	struct list_head sriov_pfs_item;
	94	struct vfio_pci_core_device *sriov_pf_core_dev;
	95	struct notifier_block nb;
	96	struct rw_semaphore memory_lock;
	97	};
	98
	99	/* Will be exported for vfio pci drivers usage */
	100	int vfio_pci_core_register_dev_region(struct vfio_pci_core_device *vdev,
	101	unsigned int type, unsigned int subtype,
	102	const struct vfio_pci_regops *ops,
	103	size_t size, u32 flags, void *data);
	104	void vfio_pci_core_set_params(bool nointxmask, bool is_disable_vga,
	105	bool is_disable_idle_d3);
	106	void vfio_pci_core_close_device(struct vfio_device *core_vdev);
	107	int vfio_pci_core_init_dev(struct vfio_device *core_vdev);
	108	void vfio_pci_core_release_dev(struct vfio_device *core_vdev);
	109	int vfio_pci_core_register_device(struct vfio_pci_core_device *vdev);
	110	void vfio_pci_core_unregister_device(struct vfio_pci_core_device *vdev);
	111	extern const struct pci_error_handlers vfio_pci_core_err_handlers;
	112	int vfio_pci_core_sriov_configure(struct vfio_pci_core_device *vdev,
	113	int nr_virtfn);
	114	long vfio_pci_core_ioctl(struct vfio_device *core_vdev, unsigned int cmd,
	115	unsigned long arg);
	116	int vfio_pci_core_ioctl_feature(struct vfio_device *device, u32 flags,
	117	void __user *arg, size_t argsz);
	118	ssize_t vfio_pci_core_read(struct vfio_device core_vdev, char __user buf,
	119	size_t count, loff_t *ppos);
	120	ssize_t vfio_pci_core_write(struct vfio_device core_vdev, const char __user buf,
	121	size_t count, loff_t *ppos);
	122	int vfio_pci_core_mmap(struct vfio_device core_vdev, struct vm_area_struct vma);
	123	void vfio_pci_core_request(struct vfio_device *core_vdev, unsigned int count);
	124	int vfio_pci_core_match(struct vfio_device core_vdev, char buf);
	125	int vfio_pci_core_enable(struct vfio_pci_core_device *vdev);
	126	void vfio_pci_core_disable(struct vfio_pci_core_device *vdev);
	127	void vfio_pci_core_finish_enable(struct vfio_pci_core_device *vdev);
	128	int vfio_pci_core_setup_barmap(struct vfio_pci_core_device *vdev, int bar);
	129	pci_ers_result_t vfio_pci_core_aer_err_detected(struct pci_dev *pdev,
	130	pci_channel_state_t state);
	131	ssize_t vfio_pci_core_do_io_rw(struct vfio_pci_core_device *vdev, bool test_mem,
	132	void __iomem io, char __user buf,
	133	loff_t off, size_t count, size_t x_start,
	134	size_t x_end, bool iswrite);
	135	bool vfio_pci_core_range_intersect_range(loff_t buf_start, size_t buf_cnt,
	136	loff_t reg_start, size_t reg_cnt,
	137	loff_t *buf_offset,
	138	size_t *intersect_count,
	139	size_t *register_offset);
	140	#define VFIO_IOWRITE_DECLARATION(size) \
	141	int vfio_pci_core_iowrite##size(struct vfio_pci_core_device *vdev, \
	142	bool test_mem, u##size val, void __iomem *io);
	143
	144	VFIO_IOWRITE_DECLARATION(8)
	145	VFIO_IOWRITE_DECLARATION(16)
	146	VFIO_IOWRITE_DECLARATION(32)
	147	#ifdef iowrite64
	148	VFIO_IOWRITE_DECLARATION(64)
	149	#endif
	150
	151	#define VFIO_IOREAD_DECLARATION(size) \
	152	int vfio_pci_core_ioread##size(struct vfio_pci_core_device *vdev, \
	153	bool test_mem, u##size val, void __iomem io);
	154
	155	VFIO_IOREAD_DECLARATION(8)
	156	VFIO_IOREAD_DECLARATION(16)
	157	VFIO_IOREAD_DECLARATION(32)
	158	#ifdef ioread64
	159	VFIO_IOREAD_DECLARATION(64)
	160	#endif
	161
	162	#endif /* VFIO_PCI_CORE_H */