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/* 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/rcupdate.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 p2pdma_provider;
struct dma_buf_phys_vec;
struct dma_buf_attachment;
struct vfio_pci_eventfd {
struct eventfd_ctx *ctx;
struct rcu_head rcu;
};
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_device_ops {
int (*get_dmabuf_phys)(struct vfio_pci_core_device *vdev,
struct p2pdma_provider **provider,
unsigned int region_index,
struct dma_buf_phys_vec *phys_vec,
struct vfio_region_dma_range *dma_ranges,
size_t nr_ranges);
};
#if IS_ENABLED(CONFIG_VFIO_PCI_DMABUF)
int vfio_pci_core_fill_phys_vec(struct dma_buf_phys_vec *phys_vec,
struct vfio_region_dma_range *dma_ranges,
size_t nr_ranges, phys_addr_t start,
phys_addr_t len);
int vfio_pci_core_get_dmabuf_phys(struct vfio_pci_core_device *vdev,
struct p2pdma_provider **provider,
unsigned int region_index,
struct dma_buf_phys_vec *phys_vec,
struct vfio_region_dma_range *dma_ranges,
size_t nr_ranges);
#else
static inline int
vfio_pci_core_fill_phys_vec(struct dma_buf_phys_vec *phys_vec,
struct vfio_region_dma_range *dma_ranges,
size_t nr_ranges, phys_addr_t start,
phys_addr_t len)
{
return -EINVAL;
}
static inline int vfio_pci_core_get_dmabuf_phys(
struct vfio_pci_core_device *vdev, struct p2pdma_provider **provider,
unsigned int region_index, struct dma_buf_phys_vec *phys_vec,
struct vfio_region_dma_range *dma_ranges, size_t nr_ranges)
{
return -EOPNOTSUPP;
}
#endif
struct vfio_pci_core_device {
struct vfio_device vdev;
struct pci_dev *pdev;
const struct vfio_pci_device_ops *pci_ops;
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 vfio_pci_eventfd __rcu *err_trigger;
struct vfio_pci_eventfd __rcu *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;
struct list_head dmabufs;
};
/* 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);
int vfio_pci_ioctl_get_region_info(struct vfio_device *core_vdev,
struct vfio_region_info *info,
struct vfio_info_cap *caps);
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);
vm_fault_t vfio_pci_vmf_insert_pfn(struct vfio_pci_core_device *vdev,
struct vm_fault *vmf, unsigned long pfn,
unsigned int order);
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_match_token_uuid(struct vfio_device *core_vdev,
const uuid_t *uuid);
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_memory_enabled(struct vfio_pci_core_device *vdev);
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
static inline bool is_aligned_for_order(struct vm_area_struct *vma,
unsigned long addr,
unsigned long pfn,
unsigned int order)
{
return !(order && (addr < vma->vm_start ||
addr + (PAGE_SIZE << order) > vma->vm_end ||
!IS_ALIGNED(pfn, 1 << order)));
}
int vfio_pci_dma_buf_iommufd_map(struct dma_buf_attachment *attachment,
struct dma_buf_phys_vec *phys);
#endif /* VFIO_PCI_CORE_H */
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