[PATCH v4 08/12] vfio_pci: duplicate vfio_pci_private.h to include/linux

Liu Yi L
2020-01-07T12:21:24Z

This patch copies drivers/vfio/pci/vfio_pci_private.h to include/linux/
for preparation of splitting vfio_pci_private.h into a private header
file and a common header file, which is to support common vfio_pci code
sharing outside drivers/vfio/pci/. No code change in this file copy.

Cc: Kevin Tian <kevin.tian@intel.com>
Cc: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Liu Yi L <yi.l.liu@intel.com>
---
include/linux/vfio_pci_common.h | 228 ++++++++++++++++++++++++++++++++++++++++
1 file changed, 228 insertions(+)
create mode 100644 include/linux/vfio_pci_common.h

diff --git a/include/linux/vfio_pci_common.h b/include/linux/vfio_pci_common.h
new file mode 100644
index 0000000..499dd04
--- /dev/null
+++ b/include/linux/vfio_pci_common.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>
+
+#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 virqfd *virqfd;
+ void __iomem *addr;
+ uint64_t data;
+ loff_t pos;
+ int bar;
+ int count;
+};
+
+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_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;
+ bool nointxmask;
+#ifdef CONFIG_VFIO_PCI_VGA
+ bool disable_vga;
+#endif
+ bool disable_idle_d3;
+};
+
+#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 const struct pci_error_handlers vfio_err_handlers;
+
+static inline bool vfio_pci_is_vga(struct pci_dev *pdev)
+{
+ return (pdev->class >> 8) == PCI_CLASS_DISPLAY_VGA;
+}
+
+static inline bool vfio_vga_disabled(struct vfio_pci_device *vdev)
+{
+#ifdef CONFIG_VFIO_PCI_VGA
+ return vdev->disable_vga;
+#else
+ return true;
+#endif
+}
+
+extern void vfio_pci_refresh_config(struct vfio_pci_device *vdev,
+ bool nointxmask, bool disable_idle_d3);
+
+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 unsigned int vfio_pci_set_vga_decode(void *opaque, bool single_vga);
+extern int vfio_pci_enable(struct vfio_pci_device *vdev);
+extern void vfio_pci_disable(struct vfio_pci_device *vdev);
+extern long vfio_pci_ioctl(void *device_data,
+ unsigned int cmd, unsigned long arg);
+extern ssize_t vfio_pci_read(void *device_data, char __user *buf,
+ size_t count, loff_t *ppos);
+extern ssize_t vfio_pci_write(void *device_data, const char __user *buf,
+ size_t count, loff_t *ppos);
+extern int vfio_pci_mmap(void *device_data, struct vm_area_struct *vma);
+extern void vfio_pci_request(void *device_data, unsigned int count);
+extern void vfio_pci_fill_ids(char *ids, struct pci_driver *driver);
+extern int vfio_pci_reflck_attach(struct vfio_pci_device *vdev);
+extern void vfio_pci_reflck_put(struct vfio_pci_reflck *reflck);
+extern void vfio_pci_probe_power_state(struct vfio_pci_device *vdev);
+
+#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
+#endif /* VFIO_PCI_PRIVATE_H */
--
2.7.4