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authorYunhong Jiang <yunhong.jiang@intel.com>2015-08-04 12:17:53 -0700
committerYunhong Jiang <yunhong.jiang@intel.com>2015-08-04 15:44:42 -0700
commit9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch)
tree1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/include/linux/vfio.h
parent98260f3884f4a202f9ca5eabed40b1354c489b29 (diff)
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/include/linux/vfio.h')
-rw-r--r--kernel/include/linux/vfio.h138
1 files changed, 138 insertions, 0 deletions
diff --git a/kernel/include/linux/vfio.h b/kernel/include/linux/vfio.h
new file mode 100644
index 000000000..ddb440975
--- /dev/null
+++ b/kernel/include/linux/vfio.h
@@ -0,0 +1,138 @@
+/*
+ * VFIO API definition
+ *
+ * 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.
+ */
+#ifndef VFIO_H
+#define VFIO_H
+
+
+#include <linux/iommu.h>
+#include <linux/mm.h>
+#include <linux/workqueue.h>
+#include <linux/poll.h>
+#include <uapi/linux/vfio.h>
+
+/**
+ * struct vfio_device_ops - VFIO bus driver device callbacks
+ *
+ * @open: Called when userspace creates new file descriptor for device
+ * @release: Called when userspace releases file descriptor for device
+ * @read: Perform read(2) on device file descriptor
+ * @write: Perform write(2) on device file descriptor
+ * @ioctl: Perform ioctl(2) on device file descriptor, supporting VFIO_DEVICE_*
+ * operations documented below
+ * @mmap: Perform mmap(2) on a region of the device file descriptor
+ * @request: Request for the bus driver to release the device
+ */
+struct vfio_device_ops {
+ char *name;
+ int (*open)(void *device_data);
+ void (*release)(void *device_data);
+ ssize_t (*read)(void *device_data, char __user *buf,
+ size_t count, loff_t *ppos);
+ ssize_t (*write)(void *device_data, const char __user *buf,
+ size_t count, loff_t *size);
+ long (*ioctl)(void *device_data, unsigned int cmd,
+ unsigned long arg);
+ int (*mmap)(void *device_data, struct vm_area_struct *vma);
+ void (*request)(void *device_data, unsigned int count);
+};
+
+extern int vfio_add_group_dev(struct device *dev,
+ const struct vfio_device_ops *ops,
+ void *device_data);
+
+extern void *vfio_del_group_dev(struct device *dev);
+extern struct vfio_device *vfio_device_get_from_dev(struct device *dev);
+extern void vfio_device_put(struct vfio_device *device);
+extern void *vfio_device_data(struct vfio_device *device);
+
+/**
+ * struct vfio_iommu_driver_ops - VFIO IOMMU driver callbacks
+ */
+struct vfio_iommu_driver_ops {
+ char *name;
+ struct module *owner;
+ void *(*open)(unsigned long arg);
+ void (*release)(void *iommu_data);
+ ssize_t (*read)(void *iommu_data, char __user *buf,
+ size_t count, loff_t *ppos);
+ ssize_t (*write)(void *iommu_data, const char __user *buf,
+ size_t count, loff_t *size);
+ long (*ioctl)(void *iommu_data, unsigned int cmd,
+ unsigned long arg);
+ int (*mmap)(void *iommu_data, struct vm_area_struct *vma);
+ int (*attach_group)(void *iommu_data,
+ struct iommu_group *group);
+ void (*detach_group)(void *iommu_data,
+ struct iommu_group *group);
+
+};
+
+extern int vfio_register_iommu_driver(const struct vfio_iommu_driver_ops *ops);
+
+extern void vfio_unregister_iommu_driver(
+ const struct vfio_iommu_driver_ops *ops);
+
+/*
+ * External user API
+ */
+extern struct vfio_group *vfio_group_get_external_user(struct file *filep);
+extern void vfio_group_put_external_user(struct vfio_group *group);
+extern int vfio_external_user_iommu_id(struct vfio_group *group);
+extern long vfio_external_check_extension(struct vfio_group *group,
+ unsigned long arg);
+
+struct pci_dev;
+#ifdef CONFIG_EEH
+extern void vfio_spapr_pci_eeh_open(struct pci_dev *pdev);
+extern void vfio_spapr_pci_eeh_release(struct pci_dev *pdev);
+extern long vfio_spapr_iommu_eeh_ioctl(struct iommu_group *group,
+ unsigned int cmd,
+ unsigned long arg);
+#else
+static inline void vfio_spapr_pci_eeh_open(struct pci_dev *pdev)
+{
+}
+
+static inline void vfio_spapr_pci_eeh_release(struct pci_dev *pdev)
+{
+}
+
+static inline long vfio_spapr_iommu_eeh_ioctl(struct iommu_group *group,
+ unsigned int cmd,
+ unsigned long arg)
+{
+ return -ENOTTY;
+}
+#endif /* CONFIG_EEH */
+
+/*
+ * IRQfd - generic
+ */
+struct virqfd {
+ void *opaque;
+ struct eventfd_ctx *eventfd;
+ int (*handler)(void *, void *);
+ void (*thread)(void *, void *);
+ void *data;
+ struct work_struct inject;
+ wait_queue_t wait;
+ poll_table pt;
+ struct work_struct shutdown;
+ struct virqfd **pvirqfd;
+};
+
+extern int vfio_virqfd_enable(void *opaque,
+ int (*handler)(void *, void *),
+ void (*thread)(void *, void *),
+ void *data, struct virqfd **pvirqfd, int fd);
+extern void vfio_virqfd_disable(struct virqfd **pvirqfd);
+
+#endif /* VFIO_H */