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-rw-r--r--include/linux/mod_devicetable.h6
-rw-r--r--include/linux/pci.h29
-rw-r--r--include/linux/vfio_pci_core.h239
3 files changed, 274 insertions, 0 deletions
diff --git a/include/linux/mod_devicetable.h b/include/linux/mod_devicetable.h
index 8e291cfdaf06..ae2e75d15b21 100644
--- a/include/linux/mod_devicetable.h
+++ b/include/linux/mod_devicetable.h
@@ -16,6 +16,10 @@ typedef unsigned long kernel_ulong_t;
#define PCI_ANY_ID (~0)
+enum {
+ PCI_ID_F_VFIO_DRIVER_OVERRIDE = 1,
+};
+
/**
* struct pci_device_id - PCI device ID structure
* @vendor: Vendor ID to match (or PCI_ANY_ID)
@@ -34,12 +38,14 @@ typedef unsigned long kernel_ulong_t;
* Best practice is to use driver_data as an index
* into a static list of equivalent device types,
* instead of using it as a pointer.
+ * @override_only: Match only when dev->driver_override is this driver.
*/
struct pci_device_id {
__u32 vendor, device; /* Vendor and device ID or PCI_ANY_ID*/
__u32 subvendor, subdevice; /* Subsystem ID's or PCI_ANY_ID */
__u32 class, class_mask; /* (class,subclass,prog-if) triplet */
kernel_ulong_t driver_data; /* Data private to the driver */
+ __u32 override_only;
};
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 540b377ca8f6..527a1dfd1d06 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -902,6 +902,35 @@ struct pci_driver {
.subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID
/**
+ * PCI_DEVICE_DRIVER_OVERRIDE - macro used to describe a PCI device with
+ * override_only flags.
+ * @vend: the 16 bit PCI Vendor ID
+ * @dev: the 16 bit PCI Device ID
+ * @driver_override: the 32 bit PCI Device override_only
+ *
+ * This macro is used to create a struct pci_device_id that matches only a
+ * driver_override device. The subvendor and subdevice fields will be set to
+ * PCI_ANY_ID.
+ */
+#define PCI_DEVICE_DRIVER_OVERRIDE(vend, dev, driver_override) \
+ .vendor = (vend), .device = (dev), .subvendor = PCI_ANY_ID, \
+ .subdevice = PCI_ANY_ID, .override_only = (driver_override)
+
+/**
+ * PCI_DRIVER_OVERRIDE_DEVICE_VFIO - macro used to describe a VFIO
+ * "driver_override" PCI device.
+ * @vend: the 16 bit PCI Vendor ID
+ * @dev: the 16 bit PCI Device ID
+ *
+ * This macro is used to create a struct pci_device_id that matches a
+ * specific device. The subvendor and subdevice fields will be set to
+ * PCI_ANY_ID and the driver_override will be set to
+ * PCI_ID_F_VFIO_DRIVER_OVERRIDE.
+ */
+#define PCI_DRIVER_OVERRIDE_DEVICE_VFIO(vend, dev) \
+ PCI_DEVICE_DRIVER_OVERRIDE(vend, dev, PCI_ID_F_VFIO_DRIVER_OVERRIDE)
+
+/**
* PCI_DEVICE_SUB - macro used to describe a specific PCI device with subsystem
* @vend: the 16 bit PCI Vendor ID
* @dev: the 16 bit PCI Device ID
diff --git a/include/linux/vfio_pci_core.h b/include/linux/vfio_pci_core.h
new file mode 100644
index 000000000000..ef9a44b6cf5d
--- /dev/null
+++ b/include/linux/vfio_pci_core.h
@@ -0,0 +1,239 @@
+/* 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)
+
+/* 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_core_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_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_dummy_resource {
+ struct resource resource;
+ int index;
+ struct list_head res_next;
+};
+
+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_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 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;
+ 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_core_device *vdev);
+extern void vfio_pci_intx_unmask(struct vfio_pci_core_device *vdev);
+
+extern int vfio_pci_set_irqs_ioctl(struct vfio_pci_core_device *vdev,
+ uint32_t flags, unsigned index,
+ unsigned start, unsigned count, void *data);
+
+extern ssize_t vfio_pci_config_rw(struct vfio_pci_core_device *vdev,
+ char __user *buf, size_t count,
+ loff_t *ppos, bool iswrite);
+
+extern ssize_t vfio_pci_bar_rw(struct vfio_pci_core_device *vdev, char __user *buf,
+ size_t count, loff_t *ppos, bool iswrite);
+
+extern ssize_t vfio_pci_vga_rw(struct vfio_pci_core_device *vdev, char __user *buf,
+ size_t count, loff_t *ppos, bool iswrite);
+
+extern long vfio_pci_ioeventfd(struct vfio_pci_core_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_core_device *vdev);
+extern void vfio_config_free(struct vfio_pci_core_device *vdev);
+
+extern int vfio_pci_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);
+
+extern int vfio_pci_set_power_state(struct vfio_pci_core_device *vdev,
+ pci_power_t state);
+
+extern bool __vfio_pci_memory_enabled(struct vfio_pci_core_device *vdev);
+extern void vfio_pci_zap_and_down_write_memory_lock(struct vfio_pci_core_device
+ *vdev);
+extern u16 vfio_pci_memory_lock_and_enable(struct vfio_pci_core_device *vdev);
+extern void vfio_pci_memory_unlock_and_restore(struct vfio_pci_core_device *vdev,
+ u16 cmd);
+
+#ifdef CONFIG_VFIO_PCI_IGD
+extern int vfio_pci_igd_init(struct vfio_pci_core_device *vdev);
+#else
+static inline int vfio_pci_igd_init(struct vfio_pci_core_device *vdev)
+{
+ return -ENODEV;
+}
+#endif
+
+#ifdef CONFIG_S390
+extern int vfio_pci_info_zdev_add_caps(struct vfio_pci_core_device *vdev,
+ struct vfio_info_cap *caps);
+#else
+static inline int vfio_pci_info_zdev_add_caps(struct vfio_pci_core_device *vdev,
+ struct vfio_info_cap *caps)
+{
+ return -ENODEV;
+}
+#endif
+
+/* Will be exported for vfio pci drivers usage */
+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);
+void vfio_pci_core_init_device(struct vfio_pci_core_device *vdev,
+ struct pci_dev *pdev,
+ const struct vfio_device_ops *vfio_pci_ops);
+int vfio_pci_core_register_device(struct vfio_pci_core_device *vdev);
+void vfio_pci_core_uninit_device(struct vfio_pci_core_device *vdev);
+void vfio_pci_core_unregister_device(struct vfio_pci_core_device *vdev);
+int vfio_pci_core_sriov_configure(struct pci_dev *pdev, int nr_virtfn);
+extern const struct pci_error_handlers vfio_pci_core_err_handlers;
+long vfio_pci_core_ioctl(struct vfio_device *core_vdev, unsigned int cmd,
+ unsigned long arg);
+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);
+
+static inline bool vfio_pci_is_vga(struct pci_dev *pdev)
+{
+ return (pdev->class >> 8) == PCI_CLASS_DISPLAY_VGA;
+}
+
+#endif /* VFIO_PCI_CORE_H */
generated by cgit v1.2.3 (git 2.0.4) at 2025-12-28 09:36:21 +0000