[RFC PATCH v3 2/9] vfio/pci: export functions in vfio_pci_ops

Yan Zhao
2020-02-11T10:20:42Z

export functions in vfio_pci_ops, so they are able to be called from
outside modules and make them a kind of inherited by vfio_device_ops
provided by other modules
including
vfio_pci_open,
vfio_pci_release,
vfio_pci_ioctl,
vfio_pci_read,
vfio_pci_write,
vfio_pci_mmap,
vfio_pci_request,

Signed-off-by: Yan Zhao <yan.y.zhao@intel.com>
---
drivers/vfio/pci/vfio_pci.c | 21 ++++++++++++++-------
include/linux/vfio.h | 11 +++++++++++
2 files changed, 25 insertions(+), 7 deletions(-)

diff --git a/drivers/vfio/pci/vfio_pci.c b/drivers/vfio/pci/vfio_pci.c
index f19e2dc498a4..02297bd3f6c2 100644
--- a/drivers/vfio/pci/vfio_pci.c
+++ b/drivers/vfio/pci/vfio_pci.c
@@ -468,7 +468,7 @@ static void vfio_pci_disable(struct vfio_pci_device *vdev)
vfio_pci_set_power_state(vdev, PCI_D3hot);
}

-static void vfio_pci_release(void *device_data)
+void vfio_pci_release(void *device_data)
{
struct vfio_pci_device *vdev = device_data;
struct vfio_pci_device_private *priv = VDEV_TO_PRIV(vdev);
@@ -484,8 +484,9 @@ static void vfio_pci_release(void *device_data)

module_put(THIS_MODULE);
}
+EXPORT_SYMBOL_GPL(vfio_pci_release);

-static int vfio_pci_open(void *device_data)
+int vfio_pci_open(void *device_data)
{
struct vfio_pci_device *vdev = device_data;
struct vfio_pci_device_private *priv = VDEV_TO_PRIV(vdev);
@@ -510,6 +511,7 @@ static int vfio_pci_open(void *device_data)
module_put(THIS_MODULE);
return ret;
}
+EXPORT_SYMBOL_GPL(vfio_pci_open);

static int vfio_pci_get_irq_count(struct vfio_pci_device *vdev, int irq_type)
{
@@ -698,7 +700,7 @@ int vfio_pci_register_dev_region(struct vfio_pci_device *vdev,
return 0;
}

-static long vfio_pci_ioctl(void *device_data,
+long vfio_pci_ioctl(void *device_data,
unsigned int cmd, unsigned long arg)
{
struct vfio_pci_device *vdev = device_data;
@@ -1152,6 +1154,7 @@ static long vfio_pci_ioctl(void *device_data,

return -ENOTTY;
}
+EXPORT_SYMBOL_GPL(vfio_pci_ioctl);

static ssize_t vfio_pci_rw(void *device_data, char __user *buf,
size_t count, loff_t *ppos, bool iswrite)
@@ -1186,7 +1189,7 @@ static ssize_t vfio_pci_rw(void *device_data, char __user *buf,
return -EINVAL;
}

-static ssize_t vfio_pci_read(void *device_data, char __user *buf,
+ssize_t vfio_pci_read(void *device_data, char __user *buf,
size_t count, loff_t *ppos)
{
if (!count)
@@ -1194,8 +1197,9 @@ static ssize_t vfio_pci_read(void *device_data, char __user *buf,

return vfio_pci_rw(device_data, buf, count, ppos, false);
}
+EXPORT_SYMBOL_GPL(vfio_pci_read);

-static ssize_t vfio_pci_write(void *device_data, const char __user *buf,
+ssize_t vfio_pci_write(void *device_data, const char __user *buf,
size_t count, loff_t *ppos)
{
if (!count)
@@ -1203,8 +1207,9 @@ static ssize_t vfio_pci_write(void *device_data, const char __user *buf,

return vfio_pci_rw(device_data, (char __user *)buf, count, ppos, true);
}
+EXPORT_SYMBOL_GPL(vfio_pci_write);

-static int vfio_pci_mmap(void *device_data, struct vm_area_struct *vma)
+int vfio_pci_mmap(void *device_data, struct vm_area_struct *vma)
{
struct vfio_pci_device *vdev = device_data;
struct vfio_pci_device_private *priv = VDEV_TO_PRIV(vdev);
@@ -1266,8 +1271,9 @@ static int vfio_pci_mmap(void *device_data, struct vm_area_struct *vma)
return remap_pfn_range(vma, vma->vm_start, vma->vm_pgoff,
req_len, vma->vm_page_prot);
}
+EXPORT_SYMBOL_GPL(vfio_pci_mmap);

-static void vfio_pci_request(void *device_data, unsigned int count)
+void vfio_pci_request(void *device_data, unsigned int count)
{
struct vfio_pci_device *vdev = device_data;
struct pci_dev *pdev = vdev->pdev;
@@ -1288,6 +1294,7 @@ static void vfio_pci_request(void *device_data, unsigned int count)

mutex_unlock(&priv->igate);
}
+EXPORT_SYMBOL_GPL(vfio_pci_request);

static const struct vfio_device_ops vfio_pci_ops = {
.name = "vfio-pci",
diff --git a/include/linux/vfio.h b/include/linux/vfio.h
index 70a2b8fb6179..64714cbd02f9 100644
--- a/include/linux/vfio.h
+++ b/include/linux/vfio.h
@@ -200,4 +200,15 @@ struct vfio_pci_device {
int num_regions;
int irq_type;
};
+
+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 int vfio_pci_open(void *device_data);
+extern void vfio_pci_release(void *device_data);
#endif /* VFIO_H */
--
2.17.1