mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-11 20:36:45 +07:00
7e992d6927
The virqfd functionality that is used by VFIO_PCI to implement interrupt masking and unmasking via an eventfd, is generic enough and can be reused by another driver. Move it to a separate file in order to allow the code to be shared. Signed-off-by: Antonios Motakis <a.motakis@virtualopensystems.com> Signed-off-by: Baptiste Reynal <b.reynal@virtualopensystems.com> Reviewed-by: Eric Auger <eric.auger@linaro.org> Tested-by: Eric Auger <eric.auger@linaro.org> Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
93 lines
2.8 KiB
C
93 lines
2.8 KiB
C
/*
|
|
* 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>
|
|
|
|
#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)
|
|
|
|
struct vfio_pci_irq_ctx {
|
|
struct eventfd_ctx *trigger;
|
|
struct virqfd *unmask;
|
|
struct virqfd *mask;
|
|
char *name;
|
|
bool masked;
|
|
};
|
|
|
|
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;
|
|
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);
|
|
#endif /* VFIO_PCI_PRIVATE_H */
|