Cleanup the namespace a bit by prefixing structures with mdev_ and
also more concretely define the mdev interface. Structs with comments
defining which fields are private vs public tempts poor behavior,
especially for an interface where we expect out of tree vendor drivers.
Thanks,
Alex
---
Alex Williamson (4):
vfio-mdev: Remove an unused structure element
vfio-mdev: de-polute the namespace, rename parent_device & parent_ops
vfio-mdev: Make mdev_parent private
vfio-mdev: Make mdev_device private and abstract interfaces
drivers/gpu/drm/i915/gvt/kvmgt.c | 22 +++++++------
drivers/vfio/mdev/mdev_core.c | 64 ++++++++++++++++++++++++++++++--------
drivers/vfio/mdev/mdev_private.h | 28 +++++++++++++++--
drivers/vfio/mdev/mdev_sysfs.c | 8 ++---
drivers/vfio/mdev/vfio_mdev.c | 12 ++++---
include/linux/mdev.h | 54 +++++++-------------------------
samples/vfio-mdev/mtty.c | 28 +++++++++--------
7 files changed, 123 insertions(+), 93 deletions(-)
From: Alex Williamson <[email protected]>
Abstract access to mdev_device so that we can define which interfaces
are public rather than relying on comments in the structure.
Cc: Kirti Wankhede <[email protected]>
Cc: Zhenyu Wang <[email protected]>
Cc: Zhi Wang <[email protected]>
Cc: Jike Song <[email protected]>
Signed-off-by: Alex Williamson <[email protected]>
---
drivers/gpu/drm/i915/gvt/kvmgt.c | 18 +++++++++---------
drivers/vfio/mdev/mdev_core.c | 30 ++++++++++++++++++++++++++++++
drivers/vfio/mdev/mdev_private.h | 12 ++++++++++++
include/linux/mdev.h | 30 ++++++------------------------
samples/vfio-mdev/mtty.c | 24 +++++++++++++-----------
5 files changed, 70 insertions(+), 44 deletions(-)
diff --git a/drivers/gpu/drm/i915/gvt/kvmgt.c b/drivers/gpu/drm/i915/gvt/kvmgt.c
index 3850032..f8021a0 100644
--- a/drivers/gpu/drm/i915/gvt/kvmgt.c
+++ b/drivers/gpu/drm/i915/gvt/kvmgt.c
@@ -166,7 +166,7 @@ static void __gvt_cache_remove_entry(struct intel_vgpu *vgpu,
static void gvt_cache_remove(struct intel_vgpu *vgpu, gfn_t gfn)
{
- struct device *dev = &vgpu->vdev.mdev->dev;
+ struct device *dev = mdev_dev(vgpu->vdev.mdev);
struct gvt_dma *this;
unsigned long g1;
int rc;
@@ -195,7 +195,7 @@ static void gvt_cache_destroy(struct intel_vgpu *vgpu)
{
struct gvt_dma *dma;
struct rb_node *node = NULL;
- struct device *dev = &vgpu->vdev.mdev->dev;
+ struct device *dev = mdev_dev(vgpu->vdev.mdev);
unsigned long gfn;
mutex_lock(&vgpu->vdev.cache_lock);
@@ -418,7 +418,7 @@ static int intel_vgpu_create(struct kobject *kobj, struct mdev_device *mdev)
mdev_set_drvdata(mdev, vgpu);
gvt_dbg_core("intel_vgpu_create succeeded for mdev: %s\n",
- dev_name(&mdev->dev));
+ dev_name(mdev_dev(mdev)));
return 0;
}
@@ -482,7 +482,7 @@ static int intel_vgpu_open(struct mdev_device *mdev)
vgpu->vdev.group_notifier.notifier_call = intel_vgpu_group_notifier;
events = VFIO_IOMMU_NOTIFY_DMA_UNMAP;
- ret = vfio_register_notifier(&mdev->dev, VFIO_IOMMU_NOTIFY, &events,
+ ret = vfio_register_notifier(mdev_dev(mdev), VFIO_IOMMU_NOTIFY, &events,
&vgpu->vdev.iommu_notifier);
if (ret != 0) {
gvt_err("vfio_register_notifier for iommu failed: %d\n", ret);
@@ -490,7 +490,7 @@ static int intel_vgpu_open(struct mdev_device *mdev)
}
events = VFIO_GROUP_NOTIFY_SET_KVM;
- ret = vfio_register_notifier(&mdev->dev, VFIO_GROUP_NOTIFY, &events,
+ ret = vfio_register_notifier(mdev_dev(mdev), VFIO_GROUP_NOTIFY, &events,
&vgpu->vdev.group_notifier);
if (ret != 0) {
gvt_err("vfio_register_notifier for group failed: %d\n", ret);
@@ -500,7 +500,7 @@ static int intel_vgpu_open(struct mdev_device *mdev)
return kvmgt_guest_init(mdev);
undo_iommu:
- vfio_unregister_notifier(&mdev->dev, VFIO_IOMMU_NOTIFY,
+ vfio_unregister_notifier(mdev_dev(mdev), VFIO_IOMMU_NOTIFY,
&vgpu->vdev.iommu_notifier);
out:
return ret;
@@ -513,9 +513,9 @@ static void __intel_vgpu_release(struct intel_vgpu *vgpu)
if (!handle_valid(vgpu->handle))
return;
- vfio_unregister_notifier(&vgpu->vdev.mdev->dev, VFIO_IOMMU_NOTIFY,
+ vfio_unregister_notifier(mdev_dev(vgpu->vdev.mdev), VFIO_IOMMU_NOTIFY,
&vgpu->vdev.iommu_notifier);
- vfio_unregister_notifier(&vgpu->vdev.mdev->dev, VFIO_GROUP_NOTIFY,
+ vfio_unregister_notifier(mdev_dev(vgpu->vdev.mdev), VFIO_GROUP_NOTIFY,
&vgpu->vdev.group_notifier);
info = (struct kvmgt_guest_info *)vgpu->handle;
@@ -1372,7 +1372,7 @@ static unsigned long kvmgt_gfn_to_pfn(unsigned long handle, unsigned long gfn)
return pfn;
pfn = INTEL_GVT_INVALID_ADDR;
- dev = &info->vgpu->vdev.mdev->dev;
+ dev = mdev_dev(info->vgpu->vdev.mdev);
rc = vfio_pin_pages(dev, &gfn, 1, IOMMU_READ | IOMMU_WRITE, &pfn);
if (rc != 1) {
gvt_err("vfio_pin_pages failed for gfn 0x%lx: %d\n", gfn, rc);
diff --git a/drivers/vfio/mdev/mdev_core.c b/drivers/vfio/mdev/mdev_core.c
index 6078d99..96a04fd 100644
--- a/drivers/vfio/mdev/mdev_core.c
+++ b/drivers/vfio/mdev/mdev_core.c
@@ -33,6 +33,36 @@ struct device *mdev_parent_dev(struct mdev_device *mdev)
}
EXPORT_SYMBOL(mdev_parent_dev);
+void *mdev_get_drvdata(struct mdev_device *mdev)
+{
+ return mdev->driver_data;
+}
+EXPORT_SYMBOL(mdev_get_drvdata);
+
+void mdev_set_drvdata(struct mdev_device *mdev, void *data)
+{
+ mdev->driver_data = data;
+}
+EXPORT_SYMBOL(mdev_set_drvdata);
+
+struct device *mdev_dev(struct mdev_device *mdev)
+{
+ return &mdev->dev;
+}
+EXPORT_SYMBOL(mdev_dev);
+
+struct mdev_device *mdev_from_dev(struct device *dev)
+{
+ return dev_is_mdev(dev) ? to_mdev_device(dev) : NULL;
+}
+EXPORT_SYMBOL(mdev_from_dev);
+
+uuid_le mdev_uuid(struct mdev_device *mdev)
+{
+ return mdev->uuid;
+}
+EXPORT_SYMBOL(mdev_uuid);
+
static int _find_mdev_device(struct device *dev, void *data)
{
struct mdev_device *mdev;
diff --git a/drivers/vfio/mdev/mdev_private.h b/drivers/vfio/mdev/mdev_private.h
index b05dd22..2f0cbae 100644
--- a/drivers/vfio/mdev/mdev_private.h
+++ b/drivers/vfio/mdev/mdev_private.h
@@ -26,6 +26,18 @@ struct mdev_parent {
struct list_head type_list;
};
+struct mdev_device {
+ struct device dev;
+ struct mdev_parent *parent;
+ uuid_le uuid;
+ void *driver_data;
+ struct kref ref;
+ struct kobject *type_kobj;
+};
+
+#define to_mdev_device(dev) container_of(dev, struct mdev_device, dev)
+#define dev_is_mdev(d) ((d)->bus == &mdev_bus_type)
+
struct mdev_type {
struct kobject kobj;
struct kobject *devices_kobj;
diff --git a/include/linux/mdev.h b/include/linux/mdev.h
index ccdf3c5..3ee44b8 100644
--- a/include/linux/mdev.h
+++ b/include/linux/mdev.h
@@ -13,17 +13,7 @@
#ifndef MDEV_H
#define MDEV_H
-/* Mediated device */
-struct mdev_device {
- struct device dev;
- struct mdev_parent *parent;
- uuid_le uuid;
- void *driver_data;
-
- /* internal */
- struct kref ref;
- struct kobject *type_kobj;
-};
+struct mdev_device;
/**
* struct mdev_parent_ops - Structure to be registered for each parent device to
@@ -74,7 +64,6 @@ struct mdev_device {
* Parent device that support mediated device should be registered with mdev
* module with mdev_parent_ops structure.
**/
-
struct mdev_parent_ops {
struct module *owner;
const struct attribute_group **dev_attr_groups;
@@ -128,22 +117,13 @@ struct mdev_driver {
};
#define to_mdev_driver(drv) container_of(drv, struct mdev_driver, driver)
-#define to_mdev_device(dev) container_of(dev, struct mdev_device, dev)
-static inline void *mdev_get_drvdata(struct mdev_device *mdev)
-{
- return mdev->driver_data;
-}
-
-static inline void mdev_set_drvdata(struct mdev_device *mdev, void *data)
-{
- mdev->driver_data = data;
-}
+extern void *mdev_get_drvdata(struct mdev_device *mdev);
+extern void mdev_set_drvdata(struct mdev_device *mdev, void *data);
+extern uuid_le mdev_uuid(struct mdev_device *mdev);
extern struct bus_type mdev_bus_type;
-#define dev_is_mdev(d) ((d)->bus == &mdev_bus_type)
-
extern int mdev_register_device(struct device *dev,
const struct mdev_parent_ops *ops);
extern void mdev_unregister_device(struct device *dev);
@@ -152,5 +132,7 @@ extern int mdev_register_device(struct device *dev,
extern void mdev_unregister_driver(struct mdev_driver *drv);
extern struct device *mdev_parent_dev(struct mdev_device *mdev);
+extern struct device *mdev_dev(struct mdev_device *mdev);
+extern struct mdev_device *mdev_from_dev(struct device *dev);
#endif /* MDEV_H */
diff --git a/samples/vfio-mdev/mtty.c b/samples/vfio-mdev/mtty.c
index 5e13efc..919c10d 100644
--- a/samples/vfio-mdev/mtty.c
+++ b/samples/vfio-mdev/mtty.c
@@ -164,7 +164,7 @@ static struct mdev_state *find_mdev_state_by_uuid(uuid_le uuid)
struct mdev_state *mds;
list_for_each_entry(mds, &mdev_devices_list, next) {
- if (uuid_le_cmp(mds->mdev->uuid, uuid) == 0)
+ if (uuid_le_cmp(mdev_uuid(mds->mdev), uuid) == 0)
return mds;
}
@@ -341,7 +341,8 @@ static void handle_bar_write(unsigned int index, struct mdev_state *mdev_state,
pr_err("Serial port %d: Fifo level trigger\n",
index);
#endif
- mtty_trigger_interrupt(mdev_state->mdev->uuid);
+ mtty_trigger_interrupt(
+ mdev_uuid(mdev_state->mdev));
}
} else {
#if defined(DEBUG_INTR)
@@ -355,7 +356,8 @@ static void handle_bar_write(unsigned int index, struct mdev_state *mdev_state,
*/
if (mdev_state->s[index].uart_reg[UART_IER] &
UART_IER_RLSI)
- mtty_trigger_interrupt(mdev_state->mdev->uuid);
+ mtty_trigger_interrupt(
+ mdev_uuid(mdev_state->mdev));
}
mutex_unlock(&mdev_state->rxtx_lock);
break;
@@ -374,7 +376,8 @@ static void handle_bar_write(unsigned int index, struct mdev_state *mdev_state,
pr_err("Serial port %d: IER_THRI write\n",
index);
#endif
- mtty_trigger_interrupt(mdev_state->mdev->uuid);
+ mtty_trigger_interrupt(
+ mdev_uuid(mdev_state->mdev));
}
mutex_unlock(&mdev_state->rxtx_lock);
@@ -445,7 +448,7 @@ static void handle_bar_write(unsigned int index, struct mdev_state *mdev_state,
#if defined(DEBUG_INTR)
pr_err("Serial port %d: MCR_OUT2 write\n", index);
#endif
- mtty_trigger_interrupt(mdev_state->mdev->uuid);
+ mtty_trigger_interrupt(mdev_uuid(mdev_state->mdev));
}
if ((mdev_state->s[index].uart_reg[UART_IER] & UART_IER_MSI) &&
@@ -453,7 +456,7 @@ static void handle_bar_write(unsigned int index, struct mdev_state *mdev_state,
#if defined(DEBUG_INTR)
pr_err("Serial port %d: MCR RTS/DTR write\n", index);
#endif
- mtty_trigger_interrupt(mdev_state->mdev->uuid);
+ mtty_trigger_interrupt(mdev_uuid(mdev_state->mdev));
}
break;
@@ -504,7 +507,8 @@ static void handle_bar_read(unsigned int index, struct mdev_state *mdev_state,
#endif
if (mdev_state->s[index].uart_reg[UART_IER] &
UART_IER_THRI)
- mtty_trigger_interrupt(mdev_state->mdev->uuid);
+ mtty_trigger_interrupt(
+ mdev_uuid(mdev_state->mdev));
}
mutex_unlock(&mdev_state->rxtx_lock);
@@ -1298,10 +1302,8 @@ void mtty_close(struct mdev_device *mdev)
sample_mdev_dev_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
- struct mdev_device *mdev = to_mdev_device(dev);
-
- if (mdev)
- return sprintf(buf, "This is MDEV %s\n", dev_name(&mdev->dev));
+ if (mdev_from_dev(dev))
+ return sprintf(buf, "This is MDEV %s\n", dev_name(dev));
return sprintf(buf, "\n");
}
From: Alex Williamson <[email protected]>
Rather than hoping for good behavior by marking some elements
internal, enforce it by making the entire structure private and
creating an accessor function for the one useful external field.
Cc: Kirti Wankhede <[email protected]>
Cc: Zhenyu Wang <[email protected]>
Cc: Zhi Wang <[email protected]>
Cc: Jike Song <[email protected]>
Signed-off-by: Alex Williamson <[email protected]>
---
drivers/gpu/drm/i915/gvt/kvmgt.c | 2 +-
drivers/vfio/mdev/mdev_core.c | 6 ++++++
drivers/vfio/mdev/mdev_private.h | 10 ++++++++++
include/linux/mdev.h | 15 ++-------------
samples/vfio-mdev/mtty.c | 2 +-
5 files changed, 20 insertions(+), 15 deletions(-)
diff --git a/drivers/gpu/drm/i915/gvt/kvmgt.c b/drivers/gpu/drm/i915/gvt/kvmgt.c
index 081ada2..3850032 100644
--- a/drivers/gpu/drm/i915/gvt/kvmgt.c
+++ b/drivers/gpu/drm/i915/gvt/kvmgt.c
@@ -396,7 +396,7 @@ static int intel_vgpu_create(struct kobject *kobj, struct mdev_device *mdev)
struct device *pdev;
void *gvt;
- pdev = mdev->parent->dev;
+ pdev = mdev_parent_dev(mdev);
gvt = kdev_to_i915(pdev)->gvt;
type = intel_gvt_find_vgpu_type(gvt, kobject_name(kobj));
diff --git a/drivers/vfio/mdev/mdev_core.c b/drivers/vfio/mdev/mdev_core.c
index 4a140e0..6078d99 100644
--- a/drivers/vfio/mdev/mdev_core.c
+++ b/drivers/vfio/mdev/mdev_core.c
@@ -27,6 +27,12 @@
static DEFINE_MUTEX(parent_list_lock);
static struct class_compat *mdev_bus_compat_class;
+struct device *mdev_parent_dev(struct mdev_device *mdev)
+{
+ return mdev->parent->dev;
+}
+EXPORT_SYMBOL(mdev_parent_dev);
+
static int _find_mdev_device(struct device *dev, void *data)
{
struct mdev_device *mdev;
diff --git a/drivers/vfio/mdev/mdev_private.h b/drivers/vfio/mdev/mdev_private.h
index 0b72c2d9..b05dd22 100644
--- a/drivers/vfio/mdev/mdev_private.h
+++ b/drivers/vfio/mdev/mdev_private.h
@@ -16,6 +16,16 @@
int mdev_bus_register(void);
void mdev_bus_unregister(void);
+struct mdev_parent {
+ struct device *dev;
+ const struct mdev_parent_ops *ops;
+ struct kref ref;
+ struct mutex lock;
+ struct list_head next;
+ struct kset *mdev_types_kset;
+ struct list_head type_list;
+};
+
struct mdev_type {
struct kobject kobj;
struct kobject *devices_kobj;
diff --git a/include/linux/mdev.h b/include/linux/mdev.h
index f7c04bb..ccdf3c5 100644
--- a/include/linux/mdev.h
+++ b/include/linux/mdev.h
@@ -13,19 +13,6 @@
#ifndef MDEV_H
#define MDEV_H
-/* Parent device */
-struct mdev_parent {
- struct device *dev;
- const struct mdev_parent_ops *ops;
-
- /* internal */
- struct kref ref;
- struct mutex lock;
- struct list_head next;
- struct kset *mdev_types_kset;
- struct list_head type_list;
-};
-
/* Mediated device */
struct mdev_device {
struct device dev;
@@ -164,4 +151,6 @@ extern int mdev_register_device(struct device *dev,
extern int mdev_register_driver(struct mdev_driver *drv, struct module *owner);
extern void mdev_unregister_driver(struct mdev_driver *drv);
+extern struct device *mdev_parent_dev(struct mdev_device *mdev);
+
#endif /* MDEV_H */
diff --git a/samples/vfio-mdev/mtty.c b/samples/vfio-mdev/mtty.c
index 1a74f0e..5e13efc 100644
--- a/samples/vfio-mdev/mtty.c
+++ b/samples/vfio-mdev/mtty.c
@@ -734,7 +734,7 @@ int mtty_create(struct kobject *kobj, struct mdev_device *mdev)
for (i = 0; i < 2; i++) {
snprintf(name, MTTY_STRING_LEN, "%s-%d",
- dev_driver_string(mdev->parent->dev), i + 1);
+ dev_driver_string(mdev_parent_dev(mdev)), i + 1);
if (!strcmp(kobj->name, name)) {
nr_ports = i + 1;
break;
From: Alex Williamson <[email protected]>
Cc: Kirti Wankhede <[email protected]>
Signed-off-by: Alex Williamson <[email protected]>
---
include/linux/mdev.h | 1 -
1 file changed, 1 deletion(-)
diff --git a/include/linux/mdev.h b/include/linux/mdev.h
index ec819e9..c3dbf0e 100644
--- a/include/linux/mdev.h
+++ b/include/linux/mdev.h
@@ -35,7 +35,6 @@ struct mdev_device {
/* internal */
struct kref ref;
- struct list_head next;
struct kobject *type_kobj;
};
From: Alex Williamson <[email protected]>
Add an mdev_ prefix so we're not poluting the namespace so much.
Cc: Kirti Wankhede <[email protected]>
Cc: Zhenyu Wang <[email protected]>
Cc: Zhi Wang <[email protected]>
Cc: Jike Song <[email protected]>
Signed-off-by: Alex Williamson <[email protected]>
---
drivers/gpu/drm/i915/gvt/kvmgt.c | 2 +-
drivers/vfio/mdev/mdev_core.c | 28 ++++++++++++++--------------
drivers/vfio/mdev/mdev_private.h | 6 +++---
drivers/vfio/mdev/mdev_sysfs.c | 8 ++++----
drivers/vfio/mdev/vfio_mdev.c | 12 ++++++------
include/linux/mdev.h | 16 ++++++++--------
samples/vfio-mdev/mtty.c | 2 +-
7 files changed, 37 insertions(+), 37 deletions(-)
diff --git a/drivers/gpu/drm/i915/gvt/kvmgt.c b/drivers/gpu/drm/i915/gvt/kvmgt.c
index 4dd6722..081ada2 100644
--- a/drivers/gpu/drm/i915/gvt/kvmgt.c
+++ b/drivers/gpu/drm/i915/gvt/kvmgt.c
@@ -1089,7 +1089,7 @@ static long intel_vgpu_ioctl(struct mdev_device *mdev, unsigned int cmd,
return 0;
}
-static const struct parent_ops intel_vgpu_ops = {
+static const struct mdev_parent_ops intel_vgpu_ops = {
.supported_type_groups = intel_vgpu_type_groups,
.create = intel_vgpu_create,
.remove = intel_vgpu_remove,
diff --git a/drivers/vfio/mdev/mdev_core.c b/drivers/vfio/mdev/mdev_core.c
index be1ee89..4a140e0 100644
--- a/drivers/vfio/mdev/mdev_core.c
+++ b/drivers/vfio/mdev/mdev_core.c
@@ -42,7 +42,7 @@ static int _find_mdev_device(struct device *dev, void *data)
return 0;
}
-static bool mdev_device_exist(struct parent_device *parent, uuid_le uuid)
+static bool mdev_device_exist(struct mdev_parent *parent, uuid_le uuid)
{
struct device *dev;
@@ -56,9 +56,9 @@ static bool mdev_device_exist(struct parent_device *parent, uuid_le uuid)
}
/* Should be called holding parent_list_lock */
-static struct parent_device *__find_parent_device(struct device *dev)
+static struct mdev_parent *__find_parent_device(struct device *dev)
{
- struct parent_device *parent;
+ struct mdev_parent *parent;
list_for_each_entry(parent, &parent_list, next) {
if (parent->dev == dev)
@@ -69,8 +69,8 @@ static struct parent_device *__find_parent_device(struct device *dev)
static void mdev_release_parent(struct kref *kref)
{
- struct parent_device *parent = container_of(kref, struct parent_device,
- ref);
+ struct mdev_parent *parent = container_of(kref, struct mdev_parent,
+ ref);
struct device *dev = parent->dev;
kfree(parent);
@@ -78,7 +78,7 @@ static void mdev_release_parent(struct kref *kref)
}
static
-inline struct parent_device *mdev_get_parent(struct parent_device *parent)
+inline struct mdev_parent *mdev_get_parent(struct mdev_parent *parent)
{
if (parent)
kref_get(&parent->ref);
@@ -86,7 +86,7 @@ inline struct parent_device *mdev_get_parent(struct parent_device *parent)
return parent;
}
-static inline void mdev_put_parent(struct parent_device *parent)
+static inline void mdev_put_parent(struct mdev_parent *parent)
{
if (parent)
kref_put(&parent->ref, mdev_release_parent);
@@ -95,7 +95,7 @@ static inline void mdev_put_parent(struct parent_device *parent)
static int mdev_device_create_ops(struct kobject *kobj,
struct mdev_device *mdev)
{
- struct parent_device *parent = mdev->parent;
+ struct mdev_parent *parent = mdev->parent;
int ret;
ret = parent->ops->create(kobj, mdev);
@@ -122,7 +122,7 @@ static int mdev_device_create_ops(struct kobject *kobj,
*/
static int mdev_device_remove_ops(struct mdev_device *mdev, bool force_remove)
{
- struct parent_device *parent = mdev->parent;
+ struct mdev_parent *parent = mdev->parent;
int ret;
/*
@@ -153,10 +153,10 @@ static int mdev_device_remove_cb(struct device *dev, void *data)
* Add device to list of registered parent devices.
* Returns a negative value on error, otherwise 0.
*/
-int mdev_register_device(struct device *dev, const struct parent_ops *ops)
+int mdev_register_device(struct device *dev, const struct mdev_parent_ops *ops)
{
int ret;
- struct parent_device *parent;
+ struct mdev_parent *parent;
/* check for mandatory ops */
if (!ops || !ops->create || !ops->remove || !ops->supported_type_groups)
@@ -229,7 +229,7 @@ int mdev_register_device(struct device *dev, const struct parent_ops *ops)
void mdev_unregister_device(struct device *dev)
{
- struct parent_device *parent;
+ struct mdev_parent *parent;
bool force_remove = true;
mutex_lock(&parent_list_lock);
@@ -266,7 +266,7 @@ int mdev_device_create(struct kobject *kobj, struct device *dev, uuid_le uuid)
{
int ret;
struct mdev_device *mdev;
- struct parent_device *parent;
+ struct mdev_parent *parent;
struct mdev_type *type = to_mdev_type(kobj);
parent = mdev_get_parent(type->parent);
@@ -330,7 +330,7 @@ int mdev_device_create(struct kobject *kobj, struct device *dev, uuid_le uuid)
int mdev_device_remove(struct device *dev, bool force_remove)
{
struct mdev_device *mdev;
- struct parent_device *parent;
+ struct mdev_parent *parent;
struct mdev_type *type;
int ret;
diff --git a/drivers/vfio/mdev/mdev_private.h b/drivers/vfio/mdev/mdev_private.h
index d35097c..0b72c2d9 100644
--- a/drivers/vfio/mdev/mdev_private.h
+++ b/drivers/vfio/mdev/mdev_private.h
@@ -19,7 +19,7 @@
struct mdev_type {
struct kobject kobj;
struct kobject *devices_kobj;
- struct parent_device *parent;
+ struct mdev_parent *parent;
struct list_head next;
struct attribute_group *group;
};
@@ -29,8 +29,8 @@ struct mdev_type {
#define to_mdev_type(_kobj) \
container_of(_kobj, struct mdev_type, kobj)
-int parent_create_sysfs_files(struct parent_device *parent);
-void parent_remove_sysfs_files(struct parent_device *parent);
+int parent_create_sysfs_files(struct mdev_parent *parent);
+void parent_remove_sysfs_files(struct mdev_parent *parent);
int mdev_create_sysfs_files(struct device *dev, struct mdev_type *type);
void mdev_remove_sysfs_files(struct device *dev, struct mdev_type *type);
diff --git a/drivers/vfio/mdev/mdev_sysfs.c b/drivers/vfio/mdev/mdev_sysfs.c
index 1a53deb..802df21 100644
--- a/drivers/vfio/mdev/mdev_sysfs.c
+++ b/drivers/vfio/mdev/mdev_sysfs.c
@@ -92,7 +92,7 @@ static void mdev_type_release(struct kobject *kobj)
.release = mdev_type_release,
};
-struct mdev_type *add_mdev_supported_type(struct parent_device *parent,
+struct mdev_type *add_mdev_supported_type(struct mdev_parent *parent,
struct attribute_group *group)
{
struct mdev_type *type;
@@ -158,7 +158,7 @@ static void remove_mdev_supported_type(struct mdev_type *type)
kobject_put(&type->kobj);
}
-static int add_mdev_supported_type_groups(struct parent_device *parent)
+static int add_mdev_supported_type_groups(struct mdev_parent *parent)
{
int i;
@@ -183,7 +183,7 @@ static int add_mdev_supported_type_groups(struct parent_device *parent)
}
/* mdev sysfs functions */
-void parent_remove_sysfs_files(struct parent_device *parent)
+void parent_remove_sysfs_files(struct mdev_parent *parent)
{
struct mdev_type *type, *tmp;
@@ -196,7 +196,7 @@ void parent_remove_sysfs_files(struct parent_device *parent)
kset_unregister(parent->mdev_types_kset);
}
-int parent_create_sysfs_files(struct parent_device *parent)
+int parent_create_sysfs_files(struct mdev_parent *parent)
{
int ret;
diff --git a/drivers/vfio/mdev/vfio_mdev.c b/drivers/vfio/mdev/vfio_mdev.c
index ffc3675..fa848a7 100644
--- a/drivers/vfio/mdev/vfio_mdev.c
+++ b/drivers/vfio/mdev/vfio_mdev.c
@@ -27,7 +27,7 @@
static int vfio_mdev_open(void *device_data)
{
struct mdev_device *mdev = device_data;
- struct parent_device *parent = mdev->parent;
+ struct mdev_parent *parent = mdev->parent;
int ret;
if (unlikely(!parent->ops->open))
@@ -46,7 +46,7 @@ static int vfio_mdev_open(void *device_data)
static void vfio_mdev_release(void *device_data)
{
struct mdev_device *mdev = device_data;
- struct parent_device *parent = mdev->parent;
+ struct mdev_parent *parent = mdev->parent;
if (likely(parent->ops->release))
parent->ops->release(mdev);
@@ -58,7 +58,7 @@ static long vfio_mdev_unlocked_ioctl(void *device_data,
unsigned int cmd, unsigned long arg)
{
struct mdev_device *mdev = device_data;
- struct parent_device *parent = mdev->parent;
+ struct mdev_parent *parent = mdev->parent;
if (unlikely(!parent->ops->ioctl))
return -EINVAL;
@@ -70,7 +70,7 @@ static ssize_t vfio_mdev_read(void *device_data, char __user *buf,
size_t count, loff_t *ppos)
{
struct mdev_device *mdev = device_data;
- struct parent_device *parent = mdev->parent;
+ struct mdev_parent *parent = mdev->parent;
if (unlikely(!parent->ops->read))
return -EINVAL;
@@ -82,7 +82,7 @@ static ssize_t vfio_mdev_write(void *device_data, const char __user *buf,
size_t count, loff_t *ppos)
{
struct mdev_device *mdev = device_data;
- struct parent_device *parent = mdev->parent;
+ struct mdev_parent *parent = mdev->parent;
if (unlikely(!parent->ops->write))
return -EINVAL;
@@ -93,7 +93,7 @@ static ssize_t vfio_mdev_write(void *device_data, const char __user *buf,
static int vfio_mdev_mmap(void *device_data, struct vm_area_struct *vma)
{
struct mdev_device *mdev = device_data;
- struct parent_device *parent = mdev->parent;
+ struct mdev_parent *parent = mdev->parent;
if (unlikely(!parent->ops->mmap))
return -EINVAL;
diff --git a/include/linux/mdev.h b/include/linux/mdev.h
index c3dbf0e..f7c04bb 100644
--- a/include/linux/mdev.h
+++ b/include/linux/mdev.h
@@ -14,9 +14,9 @@
#define MDEV_H
/* Parent device */
-struct parent_device {
- struct device *dev;
- const struct parent_ops *ops;
+struct mdev_parent {
+ struct device *dev;
+ const struct mdev_parent_ops *ops;
/* internal */
struct kref ref;
@@ -29,7 +29,7 @@ struct parent_device {
/* Mediated device */
struct mdev_device {
struct device dev;
- struct parent_device *parent;
+ struct mdev_parent *parent;
uuid_le uuid;
void *driver_data;
@@ -39,7 +39,7 @@ struct mdev_device {
};
/**
- * struct parent_ops - Structure to be registered for each parent device to
+ * struct mdev_parent_ops - Structure to be registered for each parent device to
* register the device to mdev module.
*
* @owner: The module owner.
@@ -85,10 +85,10 @@ struct mdev_device {
* @mdev: mediated device structure
* @vma: vma structure
* Parent device that support mediated device should be registered with mdev
- * module with parent_ops structure.
+ * module with mdev_parent_ops structure.
**/
-struct parent_ops {
+struct mdev_parent_ops {
struct module *owner;
const struct attribute_group **dev_attr_groups;
const struct attribute_group **mdev_attr_groups;
@@ -158,7 +158,7 @@ static inline void mdev_set_drvdata(struct mdev_device *mdev, void *data)
#define dev_is_mdev(d) ((d)->bus == &mdev_bus_type)
extern int mdev_register_device(struct device *dev,
- const struct parent_ops *ops);
+ const struct mdev_parent_ops *ops);
extern void mdev_unregister_device(struct device *dev);
extern int mdev_register_driver(struct mdev_driver *drv, struct module *owner);
diff --git a/samples/vfio-mdev/mtty.c b/samples/vfio-mdev/mtty.c
index 6b633a4..1a74f0e 100644
--- a/samples/vfio-mdev/mtty.c
+++ b/samples/vfio-mdev/mtty.c
@@ -1402,7 +1402,7 @@ struct attribute_group *mdev_type_groups[] = {
NULL,
};
-struct parent_ops mdev_fops = {
+struct mdev_parent_ops mdev_fops = {
.owner = THIS_MODULE,
.dev_attr_groups = mtty_dev_groups,
.mdev_attr_groups = mdev_dev_groups,
On 12/22/2016 07:27 AM, Alex Williamson wrote:
> Cleanup the namespace a bit by prefixing structures with mdev_ and
> also more concretely define the mdev interface. Structs with comments
> defining which fields are private vs public tempts poor behavior,
> especially for an interface where we expect out of tree vendor drivers.
Personally I like this series :)
Side notes: 1) There is also Documentation to be updated; 2) your mail
address in Author field is @nuc.home?
--
Thanks,
Jike
>
> ---
>
> Alex Williamson (4):
> vfio-mdev: Remove an unused structure element
> vfio-mdev: de-polute the namespace, rename parent_device & parent_ops
> vfio-mdev: Make mdev_parent private
> vfio-mdev: Make mdev_device private and abstract interfaces
>
>
> drivers/gpu/drm/i915/gvt/kvmgt.c | 22 +++++++------
> drivers/vfio/mdev/mdev_core.c | 64 ++++++++++++++++++++++++++++++--------
> drivers/vfio/mdev/mdev_private.h | 28 +++++++++++++++--
> drivers/vfio/mdev/mdev_sysfs.c | 8 ++---
> drivers/vfio/mdev/vfio_mdev.c | 12 ++++---
> include/linux/mdev.h | 54 +++++++-------------------------
> samples/vfio-mdev/mtty.c | 28 +++++++++--------
> 7 files changed, 123 insertions(+), 93 deletions(-)
> --
> To unsubscribe from this list: send the line "unsubscribe kvm" in
> the body of a message to [email protected]
> More majordomo info at http://vger.kernel.org/majordomo-info.html
>
>
On Thu, 22 Dec 2016 10:11:00 +0800
Jike Song <[email protected]> wrote:
> On 12/22/2016 07:27 AM, Alex Williamson wrote:
> > Cleanup the namespace a bit by prefixing structures with mdev_ and
> > also more concretely define the mdev interface. Structs with comments
> > defining which fields are private vs public tempts poor behavior,
> > especially for an interface where we expect out of tree vendor drivers.
>
> Personally I like this series :)
>
> Side notes: 1) There is also Documentation to be updated; 2) your mail
> address in Author field is @nuc.home?
Thank you on both points, clearly I wrote these on something other than
my usual system. Thanks,
Alex
> >
> > ---
> >
> > Alex Williamson (4):
> > vfio-mdev: Remove an unused structure element
> > vfio-mdev: de-polute the namespace, rename parent_device & parent_ops
> > vfio-mdev: Make mdev_parent private
> > vfio-mdev: Make mdev_device private and abstract interfaces
> >
> >
> > drivers/gpu/drm/i915/gvt/kvmgt.c | 22 +++++++------
> > drivers/vfio/mdev/mdev_core.c | 64 ++++++++++++++++++++++++++++++--------
> > drivers/vfio/mdev/mdev_private.h | 28 +++++++++++++++--
> > drivers/vfio/mdev/mdev_sysfs.c | 8 ++---
> > drivers/vfio/mdev/vfio_mdev.c | 12 ++++---
> > include/linux/mdev.h | 54 +++++++-------------------------
> > samples/vfio-mdev/mtty.c | 28 +++++++++--------
> > 7 files changed, 123 insertions(+), 93 deletions(-)
> > --
> > To unsubscribe from this list: send the line "unsubscribe kvm" in
> > the body of a message to [email protected]
> > More majordomo info at http://vger.kernel.org/majordomo-info.html
> >
> >
Not sure if this is appropriate, but if not having the Documentation considered,
for patch 2-4:
Reviewed-by: Jike Song <[email protected]>
--
Thanks,
Jike
On 12/22/2016 07:27 AM, Alex Williamson wrote:
> From: Alex Williamson <[email protected]>
>
> Add an mdev_ prefix so we're not poluting the namespace so much.
>
> Cc: Kirti Wankhede <[email protected]>
> Cc: Zhenyu Wang <[email protected]>
> Cc: Zhi Wang <[email protected]>
> Cc: Jike Song <[email protected]>
> Signed-off-by: Alex Williamson <[email protected]>
> ---
> drivers/gpu/drm/i915/gvt/kvmgt.c | 2 +-
> drivers/vfio/mdev/mdev_core.c | 28 ++++++++++++++--------------
> drivers/vfio/mdev/mdev_private.h | 6 +++---
> drivers/vfio/mdev/mdev_sysfs.c | 8 ++++----
> drivers/vfio/mdev/vfio_mdev.c | 12 ++++++------
> include/linux/mdev.h | 16 ++++++++--------
> samples/vfio-mdev/mtty.c | 2 +-
> 7 files changed, 37 insertions(+), 37 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/gvt/kvmgt.c b/drivers/gpu/drm/i915/gvt/kvmgt.c
> index 4dd6722..081ada2 100644
> --- a/drivers/gpu/drm/i915/gvt/kvmgt.c
> +++ b/drivers/gpu/drm/i915/gvt/kvmgt.c
> @@ -1089,7 +1089,7 @@ static long intel_vgpu_ioctl(struct mdev_device *mdev, unsigned int cmd,
> return 0;
> }
>
> -static const struct parent_ops intel_vgpu_ops = {
> +static const struct mdev_parent_ops intel_vgpu_ops = {
> .supported_type_groups = intel_vgpu_type_groups,
> .create = intel_vgpu_create,
> .remove = intel_vgpu_remove,
> diff --git a/drivers/vfio/mdev/mdev_core.c b/drivers/vfio/mdev/mdev_core.c
> index be1ee89..4a140e0 100644
> --- a/drivers/vfio/mdev/mdev_core.c
> +++ b/drivers/vfio/mdev/mdev_core.c
> @@ -42,7 +42,7 @@ static int _find_mdev_device(struct device *dev, void *data)
> return 0;
> }
>
> -static bool mdev_device_exist(struct parent_device *parent, uuid_le uuid)
> +static bool mdev_device_exist(struct mdev_parent *parent, uuid_le uuid)
> {
> struct device *dev;
>
> @@ -56,9 +56,9 @@ static bool mdev_device_exist(struct parent_device *parent, uuid_le uuid)
> }
>
> /* Should be called holding parent_list_lock */
> -static struct parent_device *__find_parent_device(struct device *dev)
> +static struct mdev_parent *__find_parent_device(struct device *dev)
> {
> - struct parent_device *parent;
> + struct mdev_parent *parent;
>
> list_for_each_entry(parent, &parent_list, next) {
> if (parent->dev == dev)
> @@ -69,8 +69,8 @@ static struct parent_device *__find_parent_device(struct device *dev)
>
> static void mdev_release_parent(struct kref *kref)
> {
> - struct parent_device *parent = container_of(kref, struct parent_device,
> - ref);
> + struct mdev_parent *parent = container_of(kref, struct mdev_parent,
> + ref);
> struct device *dev = parent->dev;
>
> kfree(parent);
> @@ -78,7 +78,7 @@ static void mdev_release_parent(struct kref *kref)
> }
>
> static
> -inline struct parent_device *mdev_get_parent(struct parent_device *parent)
> +inline struct mdev_parent *mdev_get_parent(struct mdev_parent *parent)
> {
> if (parent)
> kref_get(&parent->ref);
> @@ -86,7 +86,7 @@ inline struct parent_device *mdev_get_parent(struct parent_device *parent)
> return parent;
> }
>
> -static inline void mdev_put_parent(struct parent_device *parent)
> +static inline void mdev_put_parent(struct mdev_parent *parent)
> {
> if (parent)
> kref_put(&parent->ref, mdev_release_parent);
> @@ -95,7 +95,7 @@ static inline void mdev_put_parent(struct parent_device *parent)
> static int mdev_device_create_ops(struct kobject *kobj,
> struct mdev_device *mdev)
> {
> - struct parent_device *parent = mdev->parent;
> + struct mdev_parent *parent = mdev->parent;
> int ret;
>
> ret = parent->ops->create(kobj, mdev);
> @@ -122,7 +122,7 @@ static int mdev_device_create_ops(struct kobject *kobj,
> */
> static int mdev_device_remove_ops(struct mdev_device *mdev, bool force_remove)
> {
> - struct parent_device *parent = mdev->parent;
> + struct mdev_parent *parent = mdev->parent;
> int ret;
>
> /*
> @@ -153,10 +153,10 @@ static int mdev_device_remove_cb(struct device *dev, void *data)
> * Add device to list of registered parent devices.
> * Returns a negative value on error, otherwise 0.
> */
> -int mdev_register_device(struct device *dev, const struct parent_ops *ops)
> +int mdev_register_device(struct device *dev, const struct mdev_parent_ops *ops)
> {
> int ret;
> - struct parent_device *parent;
> + struct mdev_parent *parent;
>
> /* check for mandatory ops */
> if (!ops || !ops->create || !ops->remove || !ops->supported_type_groups)
> @@ -229,7 +229,7 @@ int mdev_register_device(struct device *dev, const struct parent_ops *ops)
>
> void mdev_unregister_device(struct device *dev)
> {
> - struct parent_device *parent;
> + struct mdev_parent *parent;
> bool force_remove = true;
>
> mutex_lock(&parent_list_lock);
> @@ -266,7 +266,7 @@ int mdev_device_create(struct kobject *kobj, struct device *dev, uuid_le uuid)
> {
> int ret;
> struct mdev_device *mdev;
> - struct parent_device *parent;
> + struct mdev_parent *parent;
> struct mdev_type *type = to_mdev_type(kobj);
>
> parent = mdev_get_parent(type->parent);
> @@ -330,7 +330,7 @@ int mdev_device_create(struct kobject *kobj, struct device *dev, uuid_le uuid)
> int mdev_device_remove(struct device *dev, bool force_remove)
> {
> struct mdev_device *mdev;
> - struct parent_device *parent;
> + struct mdev_parent *parent;
> struct mdev_type *type;
> int ret;
>
> diff --git a/drivers/vfio/mdev/mdev_private.h b/drivers/vfio/mdev/mdev_private.h
> index d35097c..0b72c2d9 100644
> --- a/drivers/vfio/mdev/mdev_private.h
> +++ b/drivers/vfio/mdev/mdev_private.h
> @@ -19,7 +19,7 @@
> struct mdev_type {
> struct kobject kobj;
> struct kobject *devices_kobj;
> - struct parent_device *parent;
> + struct mdev_parent *parent;
> struct list_head next;
> struct attribute_group *group;
> };
> @@ -29,8 +29,8 @@ struct mdev_type {
> #define to_mdev_type(_kobj) \
> container_of(_kobj, struct mdev_type, kobj)
>
> -int parent_create_sysfs_files(struct parent_device *parent);
> -void parent_remove_sysfs_files(struct parent_device *parent);
> +int parent_create_sysfs_files(struct mdev_parent *parent);
> +void parent_remove_sysfs_files(struct mdev_parent *parent);
>
> int mdev_create_sysfs_files(struct device *dev, struct mdev_type *type);
> void mdev_remove_sysfs_files(struct device *dev, struct mdev_type *type);
> diff --git a/drivers/vfio/mdev/mdev_sysfs.c b/drivers/vfio/mdev/mdev_sysfs.c
> index 1a53deb..802df21 100644
> --- a/drivers/vfio/mdev/mdev_sysfs.c
> +++ b/drivers/vfio/mdev/mdev_sysfs.c
> @@ -92,7 +92,7 @@ static void mdev_type_release(struct kobject *kobj)
> .release = mdev_type_release,
> };
>
> -struct mdev_type *add_mdev_supported_type(struct parent_device *parent,
> +struct mdev_type *add_mdev_supported_type(struct mdev_parent *parent,
> struct attribute_group *group)
> {
> struct mdev_type *type;
> @@ -158,7 +158,7 @@ static void remove_mdev_supported_type(struct mdev_type *type)
> kobject_put(&type->kobj);
> }
>
> -static int add_mdev_supported_type_groups(struct parent_device *parent)
> +static int add_mdev_supported_type_groups(struct mdev_parent *parent)
> {
> int i;
>
> @@ -183,7 +183,7 @@ static int add_mdev_supported_type_groups(struct parent_device *parent)
> }
>
> /* mdev sysfs functions */
> -void parent_remove_sysfs_files(struct parent_device *parent)
> +void parent_remove_sysfs_files(struct mdev_parent *parent)
> {
> struct mdev_type *type, *tmp;
>
> @@ -196,7 +196,7 @@ void parent_remove_sysfs_files(struct parent_device *parent)
> kset_unregister(parent->mdev_types_kset);
> }
>
> -int parent_create_sysfs_files(struct parent_device *parent)
> +int parent_create_sysfs_files(struct mdev_parent *parent)
> {
> int ret;
>
> diff --git a/drivers/vfio/mdev/vfio_mdev.c b/drivers/vfio/mdev/vfio_mdev.c
> index ffc3675..fa848a7 100644
> --- a/drivers/vfio/mdev/vfio_mdev.c
> +++ b/drivers/vfio/mdev/vfio_mdev.c
> @@ -27,7 +27,7 @@
> static int vfio_mdev_open(void *device_data)
> {
> struct mdev_device *mdev = device_data;
> - struct parent_device *parent = mdev->parent;
> + struct mdev_parent *parent = mdev->parent;
> int ret;
>
> if (unlikely(!parent->ops->open))
> @@ -46,7 +46,7 @@ static int vfio_mdev_open(void *device_data)
> static void vfio_mdev_release(void *device_data)
> {
> struct mdev_device *mdev = device_data;
> - struct parent_device *parent = mdev->parent;
> + struct mdev_parent *parent = mdev->parent;
>
> if (likely(parent->ops->release))
> parent->ops->release(mdev);
> @@ -58,7 +58,7 @@ static long vfio_mdev_unlocked_ioctl(void *device_data,
> unsigned int cmd, unsigned long arg)
> {
> struct mdev_device *mdev = device_data;
> - struct parent_device *parent = mdev->parent;
> + struct mdev_parent *parent = mdev->parent;
>
> if (unlikely(!parent->ops->ioctl))
> return -EINVAL;
> @@ -70,7 +70,7 @@ static ssize_t vfio_mdev_read(void *device_data, char __user *buf,
> size_t count, loff_t *ppos)
> {
> struct mdev_device *mdev = device_data;
> - struct parent_device *parent = mdev->parent;
> + struct mdev_parent *parent = mdev->parent;
>
> if (unlikely(!parent->ops->read))
> return -EINVAL;
> @@ -82,7 +82,7 @@ static ssize_t vfio_mdev_write(void *device_data, const char __user *buf,
> size_t count, loff_t *ppos)
> {
> struct mdev_device *mdev = device_data;
> - struct parent_device *parent = mdev->parent;
> + struct mdev_parent *parent = mdev->parent;
>
> if (unlikely(!parent->ops->write))
> return -EINVAL;
> @@ -93,7 +93,7 @@ static ssize_t vfio_mdev_write(void *device_data, const char __user *buf,
> static int vfio_mdev_mmap(void *device_data, struct vm_area_struct *vma)
> {
> struct mdev_device *mdev = device_data;
> - struct parent_device *parent = mdev->parent;
> + struct mdev_parent *parent = mdev->parent;
>
> if (unlikely(!parent->ops->mmap))
> return -EINVAL;
> diff --git a/include/linux/mdev.h b/include/linux/mdev.h
> index c3dbf0e..f7c04bb 100644
> --- a/include/linux/mdev.h
> +++ b/include/linux/mdev.h
> @@ -14,9 +14,9 @@
> #define MDEV_H
>
> /* Parent device */
> -struct parent_device {
> - struct device *dev;
> - const struct parent_ops *ops;
> +struct mdev_parent {
> + struct device *dev;
> + const struct mdev_parent_ops *ops;
>
> /* internal */
> struct kref ref;
> @@ -29,7 +29,7 @@ struct parent_device {
> /* Mediated device */
> struct mdev_device {
> struct device dev;
> - struct parent_device *parent;
> + struct mdev_parent *parent;
> uuid_le uuid;
> void *driver_data;
>
> @@ -39,7 +39,7 @@ struct mdev_device {
> };
>
> /**
> - * struct parent_ops - Structure to be registered for each parent device to
> + * struct mdev_parent_ops - Structure to be registered for each parent device to
> * register the device to mdev module.
> *
> * @owner: The module owner.
> @@ -85,10 +85,10 @@ struct mdev_device {
> * @mdev: mediated device structure
> * @vma: vma structure
> * Parent device that support mediated device should be registered with mdev
> - * module with parent_ops structure.
> + * module with mdev_parent_ops structure.
> **/
>
> -struct parent_ops {
> +struct mdev_parent_ops {
> struct module *owner;
> const struct attribute_group **dev_attr_groups;
> const struct attribute_group **mdev_attr_groups;
> @@ -158,7 +158,7 @@ static inline void mdev_set_drvdata(struct mdev_device *mdev, void *data)
> #define dev_is_mdev(d) ((d)->bus == &mdev_bus_type)
>
> extern int mdev_register_device(struct device *dev,
> - const struct parent_ops *ops);
> + const struct mdev_parent_ops *ops);
> extern void mdev_unregister_device(struct device *dev);
>
> extern int mdev_register_driver(struct mdev_driver *drv, struct module *owner);
> diff --git a/samples/vfio-mdev/mtty.c b/samples/vfio-mdev/mtty.c
> index 6b633a4..1a74f0e 100644
> --- a/samples/vfio-mdev/mtty.c
> +++ b/samples/vfio-mdev/mtty.c
> @@ -1402,7 +1402,7 @@ struct attribute_group *mdev_type_groups[] = {
> NULL,
> };
>
> -struct parent_ops mdev_fops = {
> +struct mdev_parent_ops mdev_fops = {
> .owner = THIS_MODULE,
> .dev_attr_groups = mtty_dev_groups,
> .mdev_attr_groups = mdev_dev_groups,
>