diff options
Diffstat (limited to 'drivers/vfio/pci/vfio_pci_private.h')
| -rw-r--r-- | drivers/vfio/pci/vfio_pci_private.h | 228 |
1 files changed, 228 insertions, 0 deletions
diff --git a/drivers/vfio/pci/vfio_pci_private.h b/drivers/vfio/pci/vfio_pci_private.h new file mode 100644 index 000000000..5c90e560c --- /dev/null +++ b/drivers/vfio/pci/vfio_pci_private.h @@ -0,0 +1,228 @@ +/* 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/irqbypass.h> +#include <linux/types.h> +#include <linux/uuid.h> +#include <linux/notifier.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 */ + +/* Cap maximum number of ioeventfds per device (arbitrary) */ +#define VFIO_PCI_IOEVENTFD_MAX 1000 + +struct vfio_pci_ioeventfd { + struct list_head next; + struct vfio_pci_device *vdev; + struct virqfd *virqfd; + void __iomem *addr; + uint64_t data; + loff_t pos; + int bar; + int count; + bool test_mem; +}; + +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); + int (*mmap)(struct vfio_pci_device *vdev, + struct vfio_pci_region *region, + struct vm_area_struct *vma); + int (*add_capability)(struct vfio_pci_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_dummy_resource { + struct resource resource; + int index; + struct list_head res_next; +}; + +struct vfio_pci_reflck { + struct kref kref; + struct mutex lock; +}; + +struct vfio_pci_vf_token { + struct mutex lock; + uuid_t uuid; + int users; +}; + +struct vfio_pci_mmap_vma { + struct vm_area_struct *vma; + struct list_head vma_next; +}; + +struct vfio_pci_device { + 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 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; + bool needs_pm_restore; + struct pci_saved_state *pci_saved_state; + struct pci_saved_state *pm_save; + struct vfio_pci_reflck *reflck; + int refcnt; + int ioeventfds_nr; + struct eventfd_ctx *err_trigger; + struct eventfd_ctx *req_trigger; + struct list_head dummy_resources_list; + struct mutex ioeventfds_lock; + struct list_head ioeventfds_list; + struct vfio_pci_vf_token *vf_token; + struct notifier_block nb; + struct mutex vma_lock; + struct list_head vma_list; + struct rw_semaphore memory_lock; +}; + +#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 long vfio_pci_ioeventfd(struct vfio_pci_device *vdev, loff_t offset, + uint64_t data, int count, int fd); + +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); + +extern int vfio_pci_set_power_state(struct vfio_pci_device *vdev, + pci_power_t state); + +extern bool __vfio_pci_memory_enabled(struct vfio_pci_device *vdev); +extern void vfio_pci_zap_and_down_write_memory_lock(struct vfio_pci_device + *vdev); +extern u16 vfio_pci_memory_lock_and_enable(struct vfio_pci_device *vdev); +extern void vfio_pci_memory_unlock_and_restore(struct vfio_pci_device *vdev, + u16 cmd); + +#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 +#ifdef CONFIG_VFIO_PCI_NVLINK2 +extern int vfio_pci_nvdia_v100_nvlink2_init(struct vfio_pci_device *vdev); +extern int vfio_pci_ibm_npu2_init(struct vfio_pci_device *vdev); +#else +static inline int vfio_pci_nvdia_v100_nvlink2_init(struct vfio_pci_device *vdev) +{ + return -ENODEV; +} + +static inline int vfio_pci_ibm_npu2_init(struct vfio_pci_device *vdev) +{ + return -ENODEV; +} +#endif + +#ifdef CONFIG_VFIO_PCI_ZDEV +extern int vfio_pci_info_zdev_add_caps(struct vfio_pci_device *vdev, + struct vfio_info_cap *caps); +#else +static inline int vfio_pci_info_zdev_add_caps(struct vfio_pci_device *vdev, + struct vfio_info_cap *caps) +{ + return -ENODEV; +} +#endif + +#endif /* VFIO_PCI_PRIVATE_H */ |