summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorAlex Williamson <alex.williamson@redhat.com>2021-06-21 15:29:51 -0600
committerAlex Williamson <alex.williamson@redhat.com>2021-06-21 15:29:51 -0600
commitbc01b7617d46524a3e31cf73e4e1948a9b3b702b (patch)
tree3dddad02fa1c7707ee30ce9edb2f571a1e9b654c
parent3b62a62429b26709895846180c93f0c21547f7ac (diff)
parent681c1615f8914451cfd432ad30e2f307b6490542 (diff)
Merge branch 'hch-mdev-direct-v4' into v5.14/vfio/next
-rw-r--r--Documentation/driver-api/vfio-mediated-device.rst35
-rw-r--r--Documentation/s390/vfio-ap.rst1
-rw-r--r--arch/s390/Kconfig2
-rw-r--r--drivers/base/base.h1
-rw-r--r--drivers/base/bus.c8
-rw-r--r--drivers/base/dd.c192
-rw-r--r--drivers/gpu/drm/i915/Kconfig2
-rw-r--r--drivers/vfio/mdev/Kconfig7
-rw-r--r--drivers/vfio/mdev/Makefile3
-rw-r--r--drivers/vfio/mdev/mdev_core.c46
-rw-r--r--drivers/vfio/mdev/mdev_driver.c10
-rw-r--r--drivers/vfio/mdev/mdev_private.h2
-rw-r--r--drivers/vfio/mdev/vfio_mdev.c24
-rw-r--r--include/linux/device.h2
-rw-r--r--include/linux/mdev.h2
-rw-r--r--samples/Kconfig6
-rw-r--r--samples/vfio-mdev/mbochs.c163
-rw-r--r--samples/vfio-mdev/mdpy.c159
-rw-r--r--samples/vfio-mdev/mtty.c185
19 files changed, 441 insertions, 409 deletions
diff --git a/Documentation/driver-api/vfio-mediated-device.rst b/Documentation/driver-api/vfio-mediated-device.rst
index 1779b85f014e..9f26079cacae 100644
--- a/Documentation/driver-api/vfio-mediated-device.rst
+++ b/Documentation/driver-api/vfio-mediated-device.rst
@@ -93,7 +93,7 @@ interfaces:
Registration Interface for a Mediated Bus Driver
------------------------------------------------
-The registration interface for a mediated bus driver provides the following
+The registration interface for a mediated device driver provides the following
structure to represent a mediated device's driver::
/*
@@ -136,37 +136,26 @@ The structures in the mdev_parent_ops structure are as follows:
* dev_attr_groups: attributes of the parent device
* mdev_attr_groups: attributes of the mediated device
* supported_config: attributes to define supported configurations
+* device_driver: device driver to bind for mediated device instances
-The functions in the mdev_parent_ops structure are as follows:
+The mdev_parent_ops also still has various functions pointers. Theses exist
+for historical reasons only and shall not be used for new drivers.
-* create: allocate basic resources in a driver for a mediated device
-* remove: free resources in a driver when a mediated device is destroyed
-
-(Note that mdev-core provides no implicit serialization of create/remove
-callbacks per mdev parent device, per mdev type, or any other categorization.
-Vendor drivers are expected to be fully asynchronous in this respect or
-provide their own internal resource protection.)
-
-The callbacks in the mdev_parent_ops structure are as follows:
-
-* open: open callback of mediated device
-* close: close callback of mediated device
-* ioctl: ioctl callback of mediated device
-* read : read emulation callback
-* write: write emulation callback
-* mmap: mmap emulation callback
-
-A driver should use the mdev_parent_ops structure in the function call to
-register itself with the mdev core driver::
+When a driver wants to add the GUID creation sysfs to an existing device it has
+probe'd to then it should call::
extern int mdev_register_device(struct device *dev,
const struct mdev_parent_ops *ops);
-However, the mdev_parent_ops structure is not required in the function call
-that a driver should use to unregister itself with the mdev core driver::
+This will provide the 'mdev_supported_types/XX/create' files which can then be
+used to trigger the creation of a mdev_device. The created mdev_device will be
+attached to the specified driver.
+
+When the driver needs to remove itself it calls::
extern void mdev_unregister_device(struct device *dev);
+Which will unbind and destroy all the created mdevs and remove the sysfs files.
Mediated Device Management Interface Through sysfs
==================================================
diff --git a/Documentation/s390/vfio-ap.rst b/Documentation/s390/vfio-ap.rst
index e15436599086..f57ae621f33e 100644
--- a/Documentation/s390/vfio-ap.rst
+++ b/Documentation/s390/vfio-ap.rst
@@ -514,7 +514,6 @@ These are the steps:
* S390_AP_IOMMU
* VFIO
* VFIO_MDEV
- * VFIO_MDEV_DEVICE
* KVM
If using make menuconfig select the following to build the vfio_ap module::
diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
index b4c7c34069f8..ea63fd22e119 100644
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -768,7 +768,7 @@ config VFIO_CCW
config VFIO_AP
def_tristate n
prompt "VFIO support for AP devices"
- depends on S390_AP_IOMMU && VFIO_MDEV_DEVICE && KVM
+ depends on S390_AP_IOMMU && VFIO_MDEV && KVM
depends on ZCRYPT
help
This driver grants access to Adjunct Processor (AP) devices
diff --git a/drivers/base/base.h b/drivers/base/base.h
index e5f9b7e656c3..404db83ee5ec 100644
--- a/drivers/base/base.h
+++ b/drivers/base/base.h
@@ -152,7 +152,6 @@ extern int driver_add_groups(struct device_driver *drv,
const struct attribute_group **groups);
extern void driver_remove_groups(struct device_driver *drv,
const struct attribute_group **groups);
-int device_driver_attach(struct device_driver *drv, struct device *dev);
void device_driver_detach(struct device *dev);
extern char *make_class_name(const char *name, struct kobject *kobj);
diff --git a/drivers/base/bus.c b/drivers/base/bus.c
index 36d0c654ea61..1f6b4bd61056 100644
--- a/drivers/base/bus.c
+++ b/drivers/base/bus.c
@@ -210,15 +210,11 @@ static ssize_t bind_store(struct device_driver *drv, const char *buf,
int err = -ENODEV;
dev = bus_find_device_by_name(bus, NULL, buf);
- if (dev && dev->driver == NULL && driver_match_device(drv, dev)) {
+ if (dev && driver_match_device(drv, dev)) {
err = device_driver_attach(drv, dev);
-
- if (err > 0) {
+ if (!err) {
/* success */
err = count;
- } else if (err == 0) {
- /* driver didn't accept device */
- err = -ENODEV;
}
}
put_device(dev);
diff --git a/drivers/base/dd.c b/drivers/base/dd.c
index ecd7cf848daf..daeb9b5763ae 100644
--- a/drivers/base/dd.c
+++ b/drivers/base/dd.c
@@ -471,6 +471,8 @@ static void driver_sysfs_remove(struct device *dev)
* (It is ok to call with no other effort from a driver's probe() method.)
*
* This function must be called with the device lock held.
+ *
+ * Callers should prefer to use device_driver_attach() instead.
*/
int device_bind_driver(struct device *dev)
{
@@ -491,15 +493,6 @@ EXPORT_SYMBOL_GPL(device_bind_driver);
static atomic_t probe_count = ATOMIC_INIT(0);
static DECLARE_WAIT_QUEUE_HEAD(probe_waitqueue);
-static void driver_deferred_probe_add_trigger(struct device *dev,
- int local_trigger_count)
-{
- driver_deferred_probe_add(dev);
- /* Did a trigger occur while probing? Need to re-trigger if yes */
- if (local_trigger_count != atomic_read(&deferred_trigger_count))
- driver_deferred_probe_trigger();
-}
-
static ssize_t state_synced_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
@@ -513,12 +506,43 @@ static ssize_t state_synced_show(struct device *dev,
}
static DEVICE_ATTR_RO(state_synced);
+
+static int call_driver_probe(struct device *dev, struct device_driver *drv)
+{
+ int ret = 0;
+
+ if (dev->bus->probe)
+ ret = dev->bus->probe(dev);
+ else if (drv->probe)
+ ret = drv->probe(dev);
+
+ switch (ret) {
+ case 0:
+ break;
+ case -EPROBE_DEFER:
+ /* Driver requested deferred probing */
+ dev_dbg(dev, "Driver %s requests probe deferral\n", drv->name);
+ break;
+ case -ENODEV:
+ case -ENXIO:
+ pr_debug("%s: probe of %s rejects match %d\n",
+ drv->name, dev_name(dev), ret);
+ break;
+ default:
+ /* driver matched but the probe failed */
+ pr_warn("%s: probe of %s failed with error %d\n",
+ drv->name, dev_name(dev), ret);
+ break;
+ }
+
+ return ret;
+}
+
static int really_probe(struct device *dev, struct device_driver *drv)
{
- int ret = -EPROBE_DEFER;
- int local_trigger_count = atomic_read(&deferred_trigger_count);
bool test_remove = IS_ENABLED(CONFIG_DEBUG_TEST_DRIVER_REMOVE) &&
!drv->suppress_bind_attrs;
+ int ret;
if (defer_all_probes) {
/*
@@ -527,17 +551,13 @@ static int really_probe(struct device *dev, struct device_driver *drv)
* wait_for_device_probe() right after that to avoid any races.
*/
dev_dbg(dev, "Driver %s force probe deferral\n", drv->name);
- driver_deferred_probe_add(dev);
- return ret;
+ return -EPROBE_DEFER;
}
ret = device_links_check_suppliers(dev);
- if (ret == -EPROBE_DEFER)
- driver_deferred_probe_add_trigger(dev, local_trigger_count);
if (ret)
return ret;
- atomic_inc(&probe_count);
pr_debug("bus: '%s': %s: probing driver %s with device %s\n",
drv->bus->name, __func__, drv->name, dev_name(dev));
if (!list_empty(&dev->devres_head)) {
@@ -572,14 +592,14 @@ re_probe:
goto probe_failed;
}
- if (dev->bus->probe) {
- ret = dev->bus->probe(dev);
- if (ret)
- goto probe_failed;
- } else if (drv->probe) {
- ret = drv->probe(dev);
- if (ret)
- goto probe_failed;
+ ret = call_driver_probe(dev, drv);
+ if (ret) {
+ /*
+ * Return probe errors as positive values so that the callers
+ * can distinguish them from other errors.
+ */
+ ret = -ret;
+ goto probe_failed;
}
if (device_add_groups(dev, drv->dev_groups)) {
@@ -621,7 +641,6 @@ re_probe:
dev->pm_domain->sync(dev);
driver_bound(dev);
- ret = 1;
pr_debug("bus: '%s': %s: bound device %s to driver %s\n",
drv->bus->name, __func__, dev_name(dev), drv->name);
goto done;
@@ -650,31 +669,7 @@ pinctrl_bind_failed:
dev->pm_domain->dismiss(dev);
pm_runtime_reinit(dev);
dev_pm_set_driver_flags(dev, 0);
-
- switch (ret) {
- case -EPROBE_DEFER:
- /* Driver requested deferred probing */
- dev_dbg(dev, "Driver %s requests probe deferral\n", drv->name);
- driver_deferred_probe_add_trigger(dev, local_trigger_count);
- break;
- case -ENODEV:
- case -ENXIO:
- pr_debug("%s: probe of %s rejects match %d\n",
- drv->name, dev_name(dev), ret);
- break;
- default:
- /* driver matched but the probe failed */
- pr_warn("%s: probe of %s failed with error %d\n",
- drv->name, dev_name(dev), ret);
- }
- /*
- * Ignore errors returned by ->probe so that the next driver can try
- * its luck.
- */
- ret = 0;
done:
- atomic_dec(&probe_count);
- wake_up_all(&probe_waitqueue);
return ret;
}
@@ -728,25 +723,14 @@ void wait_for_device_probe(void)
}
EXPORT_SYMBOL_GPL(wait_for_device_probe);
-/**
- * driver_probe_device - attempt to bind device & driver together
- * @drv: driver to bind a device to
- * @dev: device to try to bind to the driver
- *
- * This function returns -ENODEV if the device is not registered,
- * 1 if the device is bound successfully and 0 otherwise.
- *
- * This function must be called with @dev lock held. When called for a
- * USB interface, @dev->parent lock must be held as well.
- *
- * If the device has a parent, runtime-resume the parent before driver probing.
- */
-static int driver_probe_device(struct device_driver *drv, struct device *dev)
+static int __driver_probe_device(struct device_driver *drv, struct device *dev)
{
int ret = 0;
- if (!device_is_registered(dev))
+ if (dev->p->dead || !device_is_registered(dev))
return -ENODEV;
+ if (dev->driver)
+ return -EBUSY;
dev->can_match = true;
pr_debug("bus: '%s': %s: matched device %s with driver %s\n",
@@ -770,6 +754,42 @@ static int driver_probe_device(struct device_driver *drv, struct device *dev)
return ret;
}
+/**
+ * driver_probe_device - attempt to bind device & driver together
+ * @drv: driver to bind a device to
+ * @dev: device to try to bind to the driver
+ *
+ * This function returns -ENODEV if the device is not registered, -EBUSY if it
+ * already has a driver, 0 if the device is bound successfully and a positive
+ * (inverted) error code for failures from the ->probe method.
+ *
+ * This function must be called with @dev lock held. When called for a
+ * USB interface, @dev->parent lock must be held as well.
+ *
+ * If the device has a parent, runtime-resume the parent before driver probing.
+ */
+static int driver_probe_device(struct device_driver *drv, struct device *dev)
+{
+ int trigger_count = atomic_read(&deferred_trigger_count);
+ int ret;
+
+ atomic_inc(&probe_count);
+ ret = __driver_probe_device(drv, dev);
+ if (ret == -EPROBE_DEFER || ret == EPROBE_DEFER) {
+ driver_deferred_probe_add(dev);
+
+ /*
+ * Did a trigger occur while probing? Need to re-trigger if yes
+ */
+ if (trigger_count != atomic_read(&deferred_trigger_count) &&
+ !defer_all_probes)
+ driver_deferred_probe_trigger();
+ }
+ atomic_dec(&probe_count);
+ wake_up_all(&probe_waitqueue);
+ return ret;
+}
+
static inline bool cmdline_requested_async_probing(const char *drv_name)
{
return parse_option_str(async_probe_drv_names, drv_name);
@@ -867,7 +887,14 @@ static int __device_attach_driver(struct device_driver *drv, void *_data)
if (data->check_async && async_allowed != data->want_async)
return 0;
- return driver_probe_device(drv, dev);
+ /*
+ * Ignore errors returned by ->probe so that the next driver can try
+ * its luck.
+ */
+ ret = driver_probe_device(drv, dev);
+ if (ret < 0)
+ return ret;
+ return ret == 0;
}
static void __device_attach_async_helper(void *_dev, async_cookie_t cookie)
@@ -1023,43 +1050,34 @@ static void __device_driver_unlock(struct device *dev, struct device *parent)
* @dev: Device to attach it to
*
* Manually attach driver to a device. Will acquire both @dev lock and
- * @dev->parent lock if needed.
+ * @dev->parent lock if needed. Returns 0 on success, -ERR on failure.
*/
int device_driver_attach(struct device_driver *drv, struct device *dev)
{
- int ret = 0;
+ int ret;
__device_driver_lock(dev, dev->parent);
-
- /*
- * If device has been removed or someone has already successfully
- * bound a driver before us just skip the driver probe call.
- */
- if (!dev->p->dead && !dev->driver)
- ret = driver_probe_device(drv, dev);
-
+ ret = __driver_probe_device(drv, dev);
__device_driver_unlock(dev, dev->parent);
+ /* also return probe errors as normal negative errnos */
+ if (ret > 0)
+ ret = -ret;
+ if (ret == -EPROBE_DEFER)
+ return -EAGAIN;
return ret;
}
+EXPORT_SYMBOL_GPL(device_driver_attach);
static void __driver_attach_async_helper(void *_dev, async_cookie_t cookie)
{
struct device *dev = _dev;
struct device_driver *drv;
- int ret = 0;
+ int ret;
__device_driver_lock(dev, dev->parent);
-
drv = dev->p->async_driver;
-
- /*
- * If device has been removed or someone has already successfully
- * bound a driver before us just skip the driver probe call.
- */
- if (!dev->p->dead && !dev->driver)
- ret = driver_probe_device(drv, dev);
-
+ ret = driver_probe_device(drv, dev);
__device_driver_unlock(dev, dev->parent);
dev_dbg(dev, "driver %s async attach completed: %d\n", drv->name, ret);
@@ -1114,7 +1132,9 @@ static int __driver_attach(struct device *dev, void *data)
return 0;
}
- device_driver_attach(drv, dev);
+ __device_driver_lock(dev, dev->parent);
+ driver_probe_device(drv, dev);
+ __device_driver_unlock(dev, dev->parent);
return 0;
}
diff --git a/drivers/gpu/drm/i915/Kconfig b/drivers/gpu/drm/i915/Kconfig
index 1e1cb245fca7..53bc68631861 100644
--- a/drivers/gpu/drm/i915/Kconfig
+++ b/drivers/gpu/drm/i915/Kconfig
@@ -124,7 +124,7 @@ config DRM_I915_GVT_KVMGT
tristate "Enable KVM/VFIO support for Intel GVT-g"
depends on DRM_I915_GVT
depends on KVM
- depends on VFIO_MDEV && VFIO_MDEV_DEVICE
+ depends on VFIO_MDEV
default n
help
Choose this option if you want to enable KVMGT support for
diff --git a/drivers/vfio/mdev/Kconfig b/drivers/vfio/mdev/Kconfig
index 5da27f2100f9..763c877a1318 100644
--- a/drivers/vfio/mdev/Kconfig
+++ b/drivers/vfio/mdev/Kconfig
@@ -9,10 +9,3 @@ config VFIO_MDEV
See Documentation/driver-api/vfio-mediated-device.rst for more details.
If you don't know what do here, say N.
-
-config VFIO_MDEV_DEVICE
- tristate "VFIO driver for Mediated devices"
- depends on VFIO && VFIO_MDEV
- default n
- help
- VFIO based driver for Mediated devices.
diff --git a/drivers/vfio/mdev/Makefile b/drivers/vfio/mdev/Makefile
index 101516fdf375..ff9ecd802125 100644
--- a/drivers/vfio/mdev/Makefile
+++ b/drivers/vfio/mdev/Makefile
@@ -1,6 +1,5 @@
# SPDX-License-Identifier: GPL-2.0-only
-mdev-y := mdev_core.o mdev_sysfs.o mdev_driver.o
+mdev-y := mdev_core.o mdev_sysfs.o mdev_driver.o vfio_mdev.o
obj-$(CONFIG_VFIO_MDEV) += mdev.o
-obj-$(CONFIG_VFIO_MDEV_DEVICE) += vfio_mdev.o
diff --git a/drivers/vfio/mdev/mdev_core.c b/drivers/vfio/mdev/mdev_core.c
index 2a85d6fcb7dd..e4581ec093a6 100644
--- a/drivers/vfio/mdev/mdev_core.c
+++ b/drivers/vfio/mdev/mdev_core.c
@@ -94,9 +94,11 @@ static void mdev_device_remove_common(struct mdev_device *mdev)
mdev_remove_sysfs_files(mdev);
device_del(&mdev->dev);
lockdep_assert_held(&parent->unreg_sem);
- ret = parent->ops->remove(mdev);
- if (ret)
- dev_err(&mdev->dev, "Remove failed: err=%d\n", ret);
+ if (parent->ops->remove) {
+ ret = parent->ops->remove(mdev);
+ if (ret)
+ dev_err(&mdev->dev, "Remove failed: err=%d\n", ret);
+ }
/* Balances with device_initialize() */
put_device(&mdev->dev);
@@ -127,7 +129,9 @@ int mdev_register_device(struct device *dev, const struct mdev_parent_ops *ops)
char *envp[] = { env_string, NULL };
/* check for mandatory ops */
- if (!ops || !ops->create || !ops->remove || !ops->supported_type_groups)
+ if (!ops || !ops->supported_type_groups)
+ return -EINVAL;
+ if (!ops->device_driver && (!ops->create || !ops->remove))
return -EINVAL;
dev = get_device(dev);
@@ -256,6 +260,7 @@ int mdev_device_create(struct mdev_type *type, const guid_t *uuid)
int ret;
struct mdev_device *mdev, *tmp;
struct mdev_parent *parent = type->parent;
+ struct mdev_driver *drv = parent->ops->device_driver;
mutex_lock(&mdev_list_lock);
@@ -296,14 +301,22 @@ int mdev_device_create(struct mdev_type *type, const guid_t *uuid)
goto out_put_device;
}
- ret = parent->ops->create(mdev);
- if (ret)
- goto out_unlock;
+ if (parent->ops->create) {
+ ret = parent->ops->create(mdev);
+ if (ret)
+ goto out_unlock;
+ }
ret = device_add(&mdev->dev);
if (ret)
goto out_remove;
+ if (!drv)
+ drv = &vfio_mdev_driver;
+ ret = device_driver_attach(&drv->driver, &mdev->dev);
+ if (ret)
+ goto out_del;
+
ret = mdev_create_sysfs_files(mdev);
if (ret)
goto out_del;
@@ -317,7 +330,8 @@ int mdev_device_create(struct mdev_type *type, const guid_t *uuid)
out_del:
device_del(&mdev->dev);
out_remove:
- parent->ops->remove(mdev);
+ if (parent->ops->remove)
+ parent->ops->remove(mdev);
out_unlock:
up_read(&parent->unreg_sem);
out_put_device:
@@ -360,11 +374,24 @@ int mdev_device_remove(struct mdev_device *mdev)
static int __init mdev_init(void)
{
- return mdev_bus_register();
+ int rc;
+
+ rc = mdev_bus_register();
+ if (rc)
+ return rc;
+ rc = mdev_register_driver(&vfio_mdev_driver);
+ if (rc)
+ goto err_bus;
+ return 0;
+err_bus:
+ mdev_bus_unregister();
+ return rc;
}
static void __exit mdev_exit(void)
{
+ mdev_unregister_driver(&vfio_mdev_driver);
+
if (mdev_bus_compat_class)
class_compat_unregister(mdev_bus_compat_class);
@@ -378,4 +405,3 @@ MODULE_VERSION(DRIVER_VERSION);
MODULE_LICENSE("GPL v2");
MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
-MODULE_SOFTDEP("post: vfio_mdev");
diff --git a/drivers/vfio/mdev/mdev_driver.c b/drivers/vfio/mdev/mdev_driver.c
index 041699571b7e..c368ec824e2b 100644
--- a/drivers/vfio/mdev/mdev_driver.c
+++ b/drivers/vfio/mdev/mdev_driver.c
@@ -71,10 +71,20 @@ static int mdev_remove(struct device *dev)
return 0;
}
+static int mdev_match(struct device *dev, struct device_driver *drv)
+{
+ /*
+ * No drivers automatically match. Drivers are only bound by explicit
+ * device_driver_attach()
+ */
+ return 0;
+}
+
struct bus_type mdev_bus_type = {
.name = "mdev",
.probe = mdev_probe,
.remove = mdev_remove,
+ .match = mdev_match,
};
EXPORT_SYMBOL_GPL(mdev_bus_type);
diff --git a/drivers/vfio/mdev/mdev_private.h b/drivers/vfio/mdev/mdev_private.h
index 6999c89db7b1..afbad7b0a14a 100644
--- a/drivers/vfio/mdev/mdev_private.h
+++ b/drivers/vfio/mdev/mdev_private.h
@@ -37,6 +37,8 @@ struct mdev_type {
#define to_mdev_type(_kobj) \
container_of(_kobj, struct mdev_type, kobj)
+extern struct mdev_driver vfio_mdev_driver;
+
int parent_create_sysfs_files(struct mdev_parent *parent);
void parent_remove_sysfs_files(struct mdev_parent *parent);
diff --git a/drivers/vfio/mdev/vfio_mdev.c b/drivers/vfio/mdev/vfio_mdev.c
index 5ef4815609ed..39ef7489fe47 100644
--- a/drivers/vfio/mdev/vfio_mdev.c
+++ b/drivers/vfio/mdev/vfio_mdev.c
@@ -17,10 +17,6 @@
#include "mdev_private.h"
-#define DRIVER_VERSION "0.1"
-#define DRIVER_AUTHOR "NVIDIA Corporation"
-#define DRIVER_DESC "VFIO based driver for Mediated device"
-
static int vfio_mdev_open(struct vfio_device *core_vdev)
{
struct mdev_device *mdev = to_mdev_device(core_vdev->dev);
@@ -140,7 +136,7 @@ static void vfio_mdev_remove(struct mdev_device *mdev)
kfree(vdev);
}
-static struct mdev_driver vfio_mdev_driver = {
+struct mdev_driver vfio_mdev_driver = {
.driver = {
.name = "vfio_mdev",
.owner = THIS_MODULE,
@@ -149,21 +145,3 @@ static struct mdev_driver vfio_mdev_driver = {
.probe = vfio_mdev_probe,
.remove = vfio_mdev_remove,
};
-
-static int __init vfio_mdev_init(void)
-{
- return mdev_register_driver(&vfio_mdev_driver);
-}
-
-static void __exit vfio_mdev_exit(void)
-{
- mdev_unregister_driver(&vfio_mdev_driver);
-}
-
-module_init(vfio_mdev_init)
-module_exit(vfio_mdev_exit)
-
-MODULE_VERSION(DRIVER_VERSION);
-MODULE_LICENSE("GPL v2");
-MODULE_AUTHOR(DRIVER_AUTHOR);
-MODULE_DESCRIPTION(DRIVER_DESC);
diff --git a/include/linux/device.h b/include/linux/device.h
index f1a00040fa53..d8b9c9e7d493 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -845,6 +845,8 @@ static inline void *dev_get_platdata(const struct device *dev)
* Manual binding of a device to driver. See drivers/base/bus.c
* for information on use.
*/
+int __must_check device_driver_attach(struct device_driver *drv,
+ struct device *dev);
int __must_check device_bind_driver(struct device *dev);
void device_release_driver(struct device *dev);
int __must_check device_attach(struct device *dev);
diff --git a/include/linux/mdev.h b/include/linux/mdev.h
index 1fb34ea394ad..3a38598c2605 100644
--- a/include/linux/mdev.h
+++ b/include/linux/mdev.h
@@ -55,6 +55,7 @@ struct device *mtype_get_parent_dev(struct mdev_type *mtype);
* register the device to mdev module.
*
* @owner: The module owner.
+ * @device_driver: Which device driver to probe() on newly created devices
* @dev_attr_groups: Attributes of the parent device.
* @mdev_attr_groups: Attributes of the mediated device.
* @supported_type_groups: Attributes to define supported types. It is mandatory
@@ -103,6 +104,7 @@ struct device *mtype_get_parent_dev(struct mdev_type *mtype);
**/
struct mdev_parent_ops {
struct module *owner;
+ struct mdev_driver *device_driver;
const struct attribute_group **dev_attr_groups;
const struct attribute_group **mdev_attr_groups;
struct attribute_group **supported_type_groups;
diff --git a/samples/Kconfig b/samples/Kconfig
index b5a1a7aa7e23..b0503ef058d3 100644
--- a/samples/Kconfig
+++ b/samples/Kconfig
@@ -154,14 +154,14 @@ config SAMPLE_UHID
config SAMPLE_VFIO_MDEV_MTTY
tristate "Build VFIO mtty example mediated device sample code -- loadable modules only"
- depends on VFIO_MDEV_DEVICE && m
+ depends on VFIO_MDEV && m
help
Build a virtual tty sample driver for use as a VFIO
mediated device
config SAMPLE_VFIO_MDEV_MDPY
tristate "Build VFIO mdpy example mediated device sample code -- loadable modules only"
- depends on VFIO_MDEV_DEVICE && m
+ depends on VFIO_MDEV && m
help
Build a virtual display sample driver for use as a VFIO
mediated device. It is a simple framebuffer and supports
@@ -178,7 +178,7 @@ config SAMPLE_VFIO_MDEV_MDPY_FB
config SAMPLE_VFIO_MDEV_MBOCHS
tristate "Build VFIO mdpy example mediated device sample code -- loadable modules only"
- depends on VFIO_MDEV_DEVICE && m
+ depends on VFIO_MDEV && m
select DMA_SHARED_BUFFER
help
Build a virtual display sample driver for use as a VFIO
diff --git a/samples/vfio-mdev/mbochs.c b/samples/vfio-mdev/mbochs.c
index 881ef9a7296f..6c0f229db36a 100644
--- a/samples/vfio-mdev/mbochs.c
+++ b/samples/vfio-mdev/mbochs.c
@@ -130,6 +130,7 @@ static struct class *mbochs_class;
static struct cdev mbochs_cdev;
static struct device mbochs_dev;
static int mbochs_used_mbytes;
+static const struct vfio_device_ops mbochs_dev_ops;
struct vfio_region_info_ext {
struct vfio_region_info base;
@@ -160,6 +161,7 @@ struct mbochs_dmabuf {
/* State of each mdev device */
struct mdev_state {
+ struct vfio_device vdev;
u8 *vconfig;
u64 bar_mask[3];
u32 memory_bar_mask;
@@ -425,11 +427,9 @@ static void handle_edid_blob(struct mdev_state *mdev_state, u16 offset,
memcpy(buf, mdev_state->edid_blob + offset, count);
}
-static ssize_t mdev_access(struct mdev_device *mdev, char *buf, size_t count,
- loff_t pos, bool is_write)
+static ssize_t mdev_access(struct mdev_state *mdev_state, char *buf,
+ size_t count, loff_t pos, bool is_write)
{
- struct mdev_state *mdev_state = mdev_get_drvdata(mdev);
- struct device *dev = mdev_dev(mdev);
struct page *pg;
loff_t poff;
char *map;
@@ -478,7 +478,7 @@ static ssize_t mdev_access(struct mdev_device *mdev, char *buf, size_t count,
put_page(pg);
} else {
- dev_dbg(dev, "%s: %s @0x%llx (unhandled)\n",
+ dev_dbg(mdev_state->vdev.dev, "%s: %s @0x%llx (unhandled)\n",
__func__, is_write ? "WR" : "RD", pos);
ret = -1;
goto accessfailed;
@@ -493,9 +493,8 @@ accessfailed:
return ret;
}
-static int mbochs_reset(struct mdev_device *mdev)
+static int mbochs_reset(struct mdev_state *mdev_state)
{
- struct mdev_state *mdev_state = mdev_get_drvdata(mdev);
u32 size64k = mdev_state->memsize / (64 * 1024);
int i;
@@ -506,12 +505,13 @@ static int mbochs_reset(struct mdev_device *mdev)
return 0;
}
-static int mbochs_create(struct mdev_device *mdev)
+static int mbochs_probe(struct mdev_device *mdev)
{
const struct mbochs_type *type =
&mbochs_types[mdev_get_type_group_id(mdev)];
struct device *dev = mdev_dev(mdev);
struct mdev_state *mdev_state;
+ int ret = -ENOMEM;
if (type->mbytes + mbochs_used_mbytes > max_mbytes)
return -ENOMEM;
@@ -519,6 +519,7 @@ static int mbochs_create(struct mdev_device *mdev)
mdev_state = kzalloc(sizeof(struct mdev_state), GFP_KERNEL);
if (mdev_state == NULL)
return -ENOMEM;
+ vfio_init_group_dev(&mdev_state->vdev, &mdev->dev, &mbochs_dev_ops);
mdev_state->vconfig = kzalloc(MBOCHS_CONFIG_SPACE_SIZE, GFP_KERNEL);
if (mdev_state->vconfig == NULL)
@@ -537,7 +538,6 @@ static int mbochs_create(struct mdev_device *mdev)
mutex_init(&mdev_state->ops_lock);
mdev_state->mdev = mdev;
- mdev_set_drvdata(mdev, mdev_state);
INIT_LIST_HEAD(&mdev_state->dmabufs);
mdev_state->next_id = 1;
@@ -547,32 +547,38 @@ static int mbochs_create(struct mdev_device *mdev)
mdev_state->edid_regs.edid_offset = MBOCHS_EDID_BLOB_OFFSET;
mdev_state->edid_regs.edid_max_size = sizeof(mdev_state->edid_blob);
mbochs_create_config_space(mdev_state);
- mbochs_reset(mdev);
+ mbochs_reset(mdev_state);
mbochs_used_mbytes += type->mbytes;
+
+ ret = vfio_register_group_dev(&mdev_state->vdev);
+ if (ret)
+ goto err_mem;
+ dev_set_drvdata(&mdev->dev, mdev_state);
return 0;
err_mem:
kfree(mdev_state->vconfig);
kfree(mdev_state);
- return -ENOMEM;
+ return ret;
}
-static int mbochs_remove(struct mdev_device *mdev)
+static void mbochs_remove(struct mdev_device *mdev)
{
- struct mdev_state *mdev_state = mdev_get_drvdata(mdev);
+ struct mdev_state *mdev_state = dev_get_drvdata(&mdev->dev);
mbochs_used_mbytes -= mdev_state->type->mbytes;
- mdev_set_drvdata(mdev, NULL);
+ vfio_unregister_group_dev(&mdev_state->vdev);
kfree(mdev_state->pages);
kfree(mdev_state->vconfig);
kfree(mdev_state);
- return 0;
}
-static ssize_t mbochs_read(struct mdev_device *mdev, char __user *buf,
+static ssize_t mbochs_read(struct vfio_device *vdev, char __user *buf,
size_t count, loff_t *ppos)
{
+ struct mdev_state *mdev_state =
+ container_of(vdev, struct mdev_state, vdev);
unsigned int done = 0;
int ret;
@@ -582,7 +588,7 @@ static ssize_t mbochs_read(struct mdev_device *mdev, char __user *buf,
if (count >= 4 && !(*ppos % 4)) {
u32 val;
- ret = mdev_access(mdev, (char *)&val, sizeof(val),
+ ret = mdev_access(mdev_state, (char *)&val, sizeof(val),
*ppos, false);
if (ret <= 0)
goto read_err;
@@ -594,7 +600,7 @@ static ssize_t mbochs_read(struct mdev_device *mdev, char __user *buf,
} else if (count >= 2 && !(*ppos % 2)) {
u16 val;
- ret = mdev_access(mdev, (char *)&val, sizeof(val),
+ ret = mdev_access(mdev_state, (char *)&val, sizeof(val),
*ppos, false);
if (ret <= 0)
goto read_err;
@@ -606,7 +612,7 @@ static ssize_t mbochs_read(struct mdev_device *mdev, char __user *buf,
} else {
u8 val;
- ret = mdev_access(mdev, (char *)&val, sizeof(val),
+ ret = mdev_access(mdev_state, (char *)&val, sizeof(val),
*ppos, false);
if (ret <= 0)
goto read_err;
@@ -629,9 +635,11 @@ read_err:
return -EFAULT;
}
-static ssize_t mbochs_write(struct mdev_device *mdev, const char __user *buf,
+static ssize_t mbochs_write(struct vfio_device *vdev, const char __user *buf,
size_t count, loff_t *ppos)
{
+ struct mdev_state *mdev_state =
+ container_of(vdev, struct mdev_state, vdev);
unsigned int done = 0;
int ret;
@@ -644,7 +652,7 @@ static ssize_t mbochs_write(struct mdev_device *mdev, const char __user *buf,
if (copy_from_user(&val, buf, sizeof(val)))
goto write_err;
- ret = mdev_access(mdev, (char *)&val, sizeof(val),
+ ret = mdev_access(mdev_state, (char *)&val, sizeof(val),
*ppos, true);
if (ret <= 0)
goto write_err;
@@ -656,7 +664,7 @@ static ssize_t mbochs_write(struct mdev_device *mdev, const char __user *buf,
if (copy_from_user(&val, buf, sizeof(val)))
goto write_err;
- ret = mdev_access(mdev, (char *)&val, sizeof(val),
+ ret = mdev_access(mdev_state, (char *)&val, sizeof(val),
*ppos, true);
if (ret <= 0)
goto write_err;
@@ -668,7 +676,7 @@ static ssize_t mbochs_write(struct mdev_device *mdev, const char __user *buf,
if (copy_from_user(&val, buf, sizeof(val)))
goto write_err;
- ret = mdev_access(mdev, (char *)&val, sizeof(val),
+ ret = mdev_access(mdev_state, (char *)&val, sizeof(val),
*ppos, true);
if (ret <= 0)
goto write_err;
@@ -754,9 +762,10 @@ static const struct vm_operations_struct mbochs_region_vm_ops = {
.fault = mbochs_region_vm_fault,
};
-static int mbochs_mmap(struct mdev_device *mdev, struct vm_area_struct *vma)
+static int mbochs_mmap(struct vfio_device *vdev, struct vm_area_struct *vma)
{
- struct mdev_state *mdev_state = mdev_get_drvdata(mdev);
+ struct mdev_state *mdev_state =
+ container_of(vdev, struct mdev_state, vdev);
if (vma->vm_pgoff != MBOCHS_MEMORY_BAR_OFFSET >> PAGE_SHIFT)
return -EINVAL;
@@ -963,7 +972,7 @@ mbochs_dmabuf_find_by_id(struct mdev_state *mdev_state, u32 id)
static int mbochs_dmabuf_export(struct mbochs_dmabuf *dmabuf)
{
struct mdev_state *mdev_state = dmabuf->mdev_state;
- struct device *dev = mdev_dev(mdev_state->mdev);
+ struct device *dev = mdev_state->vdev.dev;
DEFINE_DMA_BUF_EXPORT_INFO(exp_info);
struct dma_buf *buf;
@@ -991,15 +1000,10 @@ static int mbochs_dmabuf_export(struct mbochs_dmabuf *dmabuf)
return 0;
}
-static int mbochs_get_region_info(struct mdev_device *mdev,
+static int mbochs_get_region_info(struct mdev_state *mdev_state,
struct vfio_region_info_ext *ext)
{
struct vfio_region_info *region_info = &ext->base;
- struct mdev_state *mdev_state;
-
- mdev_state = mdev_get_drvdata(mdev);
- if (!mdev_state)
- return -EINVAL;
if (region_info->index >= MBOCHS_NUM_REGIONS)
return -EINVAL;
@@ -1047,15 +1051,13 @@ static int mbochs_get_region_info(struct mdev_device *mdev,
return 0;
}
-static int mbochs_get_irq_info(struct mdev_device *mdev,
- struct vfio_irq_info *irq_info)
+static int mbochs_get_irq_info(struct vfio_irq_info *irq_info)
{
irq_info->count = 0;
return 0;
}
-static int mbochs_get_device_info(struct mdev_device *mdev,
- struct vfio_device_info *dev_info)
+static int mbochs_get_device_info(struct vfio_device_info *dev_info)
{
dev_info->flags = VFIO_DEVICE_FLAGS_PCI;
dev_info->num_regions = MBOCHS_NUM_REGIONS;
@@ -1063,11 +1065,9 @@ static int mbochs_get_device_info(struct mdev_device *mdev,
return 0;
}
-static int mbochs_query_gfx_plane(struct mdev_device *mdev,
+static int mbochs_query_gfx_plane(struct mdev_state *mdev_state,
struct vfio_device_gfx_plane_info *plane)
{
- struct mdev_state *mdev_state = mdev_get_drvdata(mdev);
- struct device *dev = mdev_dev(mdev);
struct mbochs_dmabuf *dmabuf;
struct mbochs_mode mode;
int ret;
@@ -1121,18 +1121,16 @@ static int mbochs_query_gfx_plane(struct mdev_device *mdev,
done:
if (plane->drm_plane_type == DRM_PLANE_TYPE_PRIMARY &&
mdev_state->active_id != plane->dmabuf_id) {
- dev_dbg(dev, "%s: primary: %d => %d\n", __func__,
- mdev_state->active_id, plane->dmabuf_id);
+ dev_dbg(mdev_state->vdev.dev, "%s: primary: %d => %d\n",
+ __func__, mdev_state->active_id, plane->dmabuf_id);
mdev_state->active_id = plane->dmabuf_id;
}
mutex_unlock(&mdev_state->ops_lock);
return 0;
}
-static int mbochs_get_gfx_dmabuf(struct mdev_device *mdev,
- u32 id)
+static int mbochs_get_gfx_dmabuf(struct mdev_state *mdev_state, u32 id)
{
- struct mdev_state *mdev_state = mdev_get_drvdata(mdev);
struct mbochs_dmabuf *dmabuf;
mutex_lock(&mdev_state->ops_lock);
@@ -1154,9 +1152,11 @@ static int mbochs_get_gfx_dmabuf(struct mdev_device *mdev,
return dma_buf_fd(dmabuf->buf, 0);
}
-static long mbochs_ioctl(struct mdev_device *mdev, unsigned int cmd,
- unsigned long arg)
+static long mbochs_ioctl(struct vfio_device *vdev, unsigned int cmd,
+ unsigned long arg)
{
+ struct mdev_state *mdev_state =
+ container_of(vdev, struct mdev_state, vdev);
int ret = 0;
unsigned long minsz, outsz;
@@ -1173,7 +1173,7 @@ static long mbochs_ioctl(struct mdev_device *mdev, unsigned int cmd,
if (info.argsz < minsz)
return -EINVAL;
- ret = mbochs_get_device_info(mdev, &info);
+ ret = mbochs_get_device_info(&info);
if (ret)
return ret;
@@ -1197,7 +1197,7 @@ static long mbochs_ioctl(struct mdev_device *mdev, unsigned int cmd,
if (outsz > sizeof(info))
return -EINVAL;
- ret = mbochs_get_region_info(mdev, &info);
+ ret = mbochs_get_region_info(mdev_state, &info);
if (ret)
return ret;
@@ -1220,7 +1220,7 @@ static long mbochs_ioctl(struct mdev_device *mdev, unsigned int cmd,
(info.index >= VFIO_PCI_NUM_IRQS))
return -EINVAL;
- ret = mbochs_get_irq_info(mdev, &info);
+ ret = mbochs_get_irq_info(&info);
if (ret)
return ret;
@@ -1243,7 +1243,7 @@ static long mbochs_ioctl(struct mdev_device *mdev, unsigned int cmd,
if (plane.argsz < minsz)
return -EINVAL;
- ret = mbochs_query_gfx_plane(mdev, &plane);
+ ret = mbochs_query_gfx_plane(mdev_state, &plane);
if (ret)
return ret;
@@ -1260,19 +1260,19 @@ static long mbochs_ioctl(struct mdev_device *mdev, unsigned int cmd,
if (get_user(dmabuf_id, (__u32 __user *)arg))
return -EFAULT;
- return mbochs_get_gfx_dmabuf(mdev, dmabuf_id);
+ return mbochs_get_gfx_dmabuf(mdev_state, dmabuf_id);
}
case VFIO_DEVICE_SET_IRQS:
return -EINVAL;
case VFIO_DEVICE_RESET:
- return mbochs_reset(mdev);
+ return mbochs_reset(mdev_state);
}
return -ENOTTY;
}
-static int mbochs_open(struct mdev_device *mdev)
+static int mbochs_open(struct vfio_device *vdev)
{
if (!try_module_get(THIS_MODULE))
return -ENODEV;
@@ -1280,9 +1280,10 @@ static int mbochs_open(struct mdev_device *mdev)
return 0;
}
-static void mbochs_close(struct mdev_device *mdev)
+static void mbochs_close(struct vfio_device *vdev)
{
- struct mdev_state *mdev_state = mdev_get_drvdata(mdev);
+ struct mdev_state *mdev_state =
+ container_of(vdev, struct mdev_state, vdev);
struct mbochs_dmabuf *dmabuf, *tmp;
mutex_lock(&mdev_state->ops_lock);
@@ -1306,8 +1307,7 @@ static ssize_t
memory_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
- struct mdev_device *mdev = mdev_from_dev(dev);
- struct mdev_state *mdev_state = mdev_get_drvdata(mdev);
+ struct mdev_state *mdev_state = dev_get_drvdata(dev);
return sprintf(buf, "%d MB\n", mdev_state->type->mbytes);
}
@@ -1398,18 +1398,30 @@ static struct attribute_group *mdev_type_groups[] = {
NULL,
};
+static const struct vfio_device_ops mbochs_dev_ops = {
+ .open = mbochs_open,
+ .release = mbochs_close,
+ .read = mbochs_read,
+ .write = mbochs_write,
+ .ioctl = mbochs_ioctl,
+ .mmap = mbochs_mmap,
+};
+
+static struct mdev_driver mbochs_driver = {
+ .driver = {
+ .name = "mbochs",
+ .owner = THIS_MODULE,
+ .mod_name = KBUILD_MODNAME,
+ .dev_groups = mdev_dev_groups,
+ },
+ .probe = mbochs_probe,
+ .remove = mbochs_remove,
+};
+
static const struct mdev_parent_ops mdev_fops = {
.owner = THIS_MODULE,
- .mdev_attr_groups = mdev_dev_groups,
+ .device_driver = &mbochs_driver,
.supported_type_groups = mdev_type_groups,
- .create = mbochs_create,
- .remove = mbochs_remove,
- .open = mbochs_open,
- .release = mbochs_close,
- .read = mbochs_read,
- .write = mbochs_write,
- .ioctl = mbochs_ioctl,
- .mmap = mbochs_mmap,
};
static const struct file_operations vd_fops = {
@@ -1434,11 +1446,15 @@ static int __init mbochs_dev_init(void)
cdev_add(&mbochs_cdev, mbochs_devt, MINORMASK + 1);
pr_info("%s: major %d\n", __func__, MAJOR(mbochs_devt));
+ ret = mdev_register_driver(&mbochs_driver);
+ if (ret)
+ goto err_cdev;
+
mbochs_class = class_create(THIS_MODULE, MBOCHS_CLASS_NAME);
if (IS_ERR(mbochs_class)) {
pr_err("Error: failed to register mbochs_dev class\n");
ret = PTR_ERR(mbochs_class);
- goto failed1;
+ goto err_driver;
}
mbochs_dev.class = mbochs_class;
mbochs_dev.release = mbochs_device_release;
@@ -1446,19 +1462,21 @@ static int __init mbochs_dev_init(void)
ret = device_register(&mbochs_dev);
if (ret)
- goto failed2;
+ goto err_class;
ret = mdev_register_device(&mbochs_dev, &mdev_fops);
if (ret)
- goto failed3;
+ goto err_device;
return 0;
-failed3:
+err_device:
device_unregister(&mbochs_dev);
-failed2:
+err_class:
class_destroy(mbochs_class);
-failed1:
+err_driver:
+ mdev_unregister_driver(&mbochs_driver);
+err_cdev:
cdev_del(&mbochs_cdev);
unregister_chrdev_region(mbochs_devt, MINORMASK + 1);
return ret;
@@ -1470,6 +1488,7 @@ static void __exit mbochs_dev_exit(void)
mdev_unregister_device(&mbochs_dev);
device_unregister(&mbochs_dev);
+ mdev_unregister_driver(&mbochs_driver);
cdev_del(&mbochs_cdev);
unregister_chrdev_region(mbochs_devt, MINORMASK + 1);
class_destroy(mbochs_class);
diff --git a/samples/vfio-mdev/mdpy.c b/samples/vfio-mdev/mdpy.c
index e889c1cf8fd1..7e9c9df0f05b 100644
--- a/samples/vfio-mdev/mdpy.c
+++ b/samples/vfio-mdev/mdpy.c
@@ -85,9 +85,11 @@ static struct class *mdpy_class;
static struct cdev mdpy_cdev;
static struct device mdpy_dev;
static u32 mdpy_count;
+static const struct vfio_device_ops mdpy_dev_ops;
/* State of each mdev device */
struct mdev_state {
+ struct vfio_device vdev;
u8 *vconfig;
u32 bar_mask;
struct mutex ops_lock;
@@ -162,11 +164,9 @@ static void handle_pci_cfg_write(struct mdev_state *mdev_state, u16 offset,
}
}
-static ssize_t mdev_access(struct mdev_device *mdev, char *buf, size_t count,
- loff_t pos, bool is_write)
+static ssize_t mdev_access(struct mdev_state *mdev_state, char *buf,
+ size_t count, loff_t pos, bool is_write)
{
- struct mdev_state *mdev_state = mdev_get_drvdata(mdev);
- struct device *dev = mdev_dev(mdev);
int ret = 0;
mutex_lock(&mdev_state->ops_lock);
@@ -187,8 +187,9 @@ static ssize_t mdev_access(struct mdev_device *mdev, char *buf, size_t count,
memcpy(buf, mdev_state->memblk, count);
} else {
- dev_info(dev, "%s: %s @0x%llx (unhandled)\n",
- __func__, is_write ? "WR" : "RD", pos);
+ dev_info(mdev_state->vdev.dev,
+ "%s: %s @0x%llx (unhandled)\n", __func__,
+ is_write ? "WR" : "RD", pos);
ret = -1;
goto accessfailed;
}
@@ -202,9 +203,8 @@ accessfailed:
return ret;
}
-static int mdpy_reset(struct mdev_device *mdev)
+static int mdpy_reset(struct mdev_state *mdev_state)
{
- struct mdev_state *mdev_state = mdev_get_drvdata(mdev);
u32 stride, i;
/* initialize with gray gradient */
@@ -216,13 +216,14 @@ static int mdpy_reset(struct mdev_device *mdev)
return 0;
}
-static int mdpy_create(struct mdev_device *mdev)
+static int mdpy_probe(struct mdev_device *mdev)
{
const struct mdpy_type *type =
&mdpy_types[mdev_get_type_group_id(mdev)];
struct device *dev = mdev_dev(mdev);
struct mdev_state *mdev_state;
u32 fbsize;
+ int ret;
if (mdpy_count >= max_devices)
return -ENOMEM;
@@ -230,6 +231,7 @@ static int mdpy_create(struct mdev_device *mdev)
mdev_state = kzalloc(sizeof(struct mdev_state), GFP_KERNEL);
if (mdev_state == NULL)
return -ENOMEM;
+ vfio_init_group_dev(&mdev_state->vdev, &mdev->dev, &mdpy_dev_ops);
mdev_state->vconfig = kzalloc(MDPY_CONFIG_SPACE_SIZE, GFP_KERNEL);
if (mdev_state->vconfig == NULL) {
@@ -250,36 +252,41 @@ static int mdpy_create(struct mdev_device *mdev)
mutex_init(&mdev_state->ops_lock);
mdev_state->mdev = mdev;
- mdev_set_drvdata(mdev, mdev_state);
-
mdev_state->type = type;
mdev_state->memsize = fbsize;
mdpy_create_config_space(mdev_state);
- mdpy_reset(mdev);
+ mdpy_reset(mdev_state);
mdpy_count++;
+
+ ret = vfio_register_group_dev(&mdev_state->vdev);
+ if (ret) {
+ kfree(mdev_state);
+ return ret;
+ }
+ dev_set_drvdata(&mdev->dev, mdev_state);
return 0;
}
-static int mdpy_remove(struct mdev_device *mdev)
+static void mdpy_remove(struct mdev_device *mdev)
{
- struct mdev_state *mdev_state = mdev_get_drvdata(mdev);
- struct device *dev = mdev_dev(mdev);
+ struct mdev_state *mdev_state = dev_get_drvdata(&mdev->dev);
- dev_info(dev, "%s\n", __func__);
+ dev_info(&mdev->dev, "%s\n", __func__);
- mdev_set_drvdata(mdev, NULL);
+ vfio_unregister_group_dev(&mdev_state->vdev);
vfree(mdev_state->memblk);
kfree(mdev_state->vconfig);
kfree(mdev_state);
mdpy_count--;
- return 0;
}
-static ssize_t mdpy_read(struct mdev_device *mdev, char __user *buf,
+static ssize_t mdpy_read(struct vfio_device *vdev, char __user *buf,
size_t count, loff_t *ppos)
{
+ struct mdev_state *mdev_state =
+ container_of(vdev, struct mdev_state, vdev);
unsigned int done = 0;
int ret;
@@ -289,8 +296,8 @@ static ssize_t mdpy_read(struct mdev_device *mdev, char __user *buf,
if (count >= 4 && !(*ppos % 4)) {
u32 val;
- ret = mdev_access(mdev, (char *)&val, sizeof(val),
- *ppos, false);
+ ret = mdev_access(mdev_state, (char *)&val, sizeof(val),
+ *ppos, false);
if (ret <= 0)
goto read_err;
@@ -301,7 +308,7 @@ static ssize_t mdpy_read(struct mdev_device *mdev, char __user *buf,
} else if (count >= 2 && !(*ppos % 2)) {
u16 val;
- ret = mdev_access(mdev, (char *)&val, sizeof(val),
+ ret = mdev_access(mdev_state, (char *)&val, sizeof(val),
*ppos, false);
if (ret <= 0)
goto read_err;
@@ -313,7 +320,7 @@ static ssize_t mdpy_read(struct mdev_device *mdev, char __user *buf,
} else {
u8 val;
- ret = mdev_access(mdev, (char *)&val, sizeof(val),
+ ret = mdev_access(mdev_state, (char *)&val, sizeof(val),
*ppos, false);
if (ret <= 0)
goto read_err;
@@ -336,9 +343,11 @@ read_err:
return -EFAULT;
}
-static ssize_t mdpy_write(struct mdev_device *mdev, const char __user *buf,
+static ssize_t mdpy_write(struct vfio_device *vdev, const char __user *buf,
size_t count, loff_t *ppos)
{
+ struct mdev_state *mdev_state =
+ container_of(vdev, struct mdev_state, vdev);
unsigned int done = 0;
int ret;
@@ -351,7 +360,7 @@ static ssize_t mdpy_write(struct mdev_device *mdev, const char __user *buf,
if (copy_from_user(&val, buf, sizeof(val)))
goto write_err;
- ret = mdev_access(mdev, (char *)&val, sizeof(val),
+ ret = mdev_access(mdev_state, (char *)&val, sizeof(val),
*ppos, true);
if (ret <= 0)
goto write_err;
@@ -363,7 +372,7 @@ static ssize_t mdpy_write(struct mdev_device *mdev, const char __user *buf,
if (copy_from_user(&val, buf, sizeof(val)))
goto write_err;
- ret = mdev_access(mdev, (char *)&val, sizeof(val),
+ ret = mdev_access(mdev_state, (char *)&val, sizeof(val),
*ppos, true);
if (ret <= 0)
goto write_err;
@@ -375,7 +384,7 @@ static ssize_t mdpy_write(struct mdev_device *mdev, const char __user *buf,
if (copy_from_user(&val, buf, sizeof(val)))
goto write_err;
- ret = mdev_access(mdev, (char *)&val, sizeof(val),
+ ret = mdev_access(mdev_state, (char *)&val, sizeof(val),
*ppos, true);
if (ret <= 0)
goto write_err;
@@ -393,9 +402,10 @@ write_err:
return -EFAULT;
}
-static int mdpy_mmap(struct mdev_device *mdev, struct vm_area_struct *vma)
+static int mdpy_mmap(struct vfio_device *vdev, struct vm_area_struct *vma)
{
- struct mdev_state *mdev_state = mdev_get_drvdata(mdev);
+ struct mdev_state *mdev_state =
+ container_of(vdev, struct mdev_state, vdev);
if (vma->vm_pgoff != MDPY_MEMORY_BAR_OFFSET >> PAGE_SHIFT)
return -EINVAL;
@@ -409,16 +419,10 @@ static int mdpy_mmap(struct mdev_device *mdev, struct vm_area_struct *vma)
return remap_vmalloc_range(vma, mdev_state->memblk, 0);
}
-static int mdpy_get_region_info(struct mdev_device *mdev,
+static int mdpy_get_region_info(struct mdev_state *mdev_state,
struct vfio_region_info *region_info,
u16 *cap_type_id, void **cap_type)
{
- struct mdev_state *mdev_state;
-
- mdev_state = mdev_get_drvdata(mdev);
- if (!mdev_state)
- return -EINVAL;
-
if (region_info->index >= VFIO_PCI_NUM_REGIONS &&
region_info->index != MDPY_DISPLAY_REGION)
return -EINVAL;
@@ -447,15 +451,13 @@ static int mdpy_get_region_info(struct mdev_device *mdev,
return 0;
}
-static int mdpy_get_irq_info(struct mdev_device *mdev,
- struct vfio_irq_info *irq_info)
+static int mdpy_get_irq_info(struct vfio_irq_info *irq_info)
{
irq_info->count = 0;
return 0;
}
-static int mdpy_get_device_info(struct mdev_device *mdev,
- struct vfio_device_info *dev_info)
+static int mdpy_get_device_info(struct vfio_device_info *dev_info)
{
dev_info->flags = VFIO_DEVICE_FLAGS_PCI;
dev_info->num_regions = VFIO_PCI_NUM_REGIONS;
@@ -463,11 +465,9 @@ static int mdpy_get_device_info(struct mdev_device *mdev,
return 0;
}
-static int mdpy_query_gfx_plane(struct mdev_device *mdev,
+static int mdpy_query_gfx_plane(struct mdev_state *mdev_state,
struct vfio_device_gfx_plane_info *plane)
{
- struct mdev_state *mdev_state = mdev_get_drvdata(mdev);
-
if (plane->flags & VFIO_GFX_PLANE_TYPE_PROBE) {
if (plane->flags == (VFIO_GFX_PLANE_TYPE_PROBE |
VFIO_GFX_PLANE_TYPE_REGION))
@@ -496,14 +496,13 @@ static int mdpy_query_gfx_plane(struct mdev_device *mdev,
return 0;
}
-static long mdpy_ioctl(struct mdev_device *mdev, unsigned int cmd,
+static long mdpy_ioctl(struct vfio_device *vdev, unsigned int cmd,
unsigned long arg)
{
int ret = 0;
unsigned long minsz;
- struct mdev_state *mdev_state;
-
- mdev_state = mdev_get_drvdata(mdev);
+ struct mdev_state *mdev_state =
+ container_of(vdev, struct mdev_state, vdev);
switch (cmd) {
case VFIO_DEVICE_GET_INFO:
@@ -518,7 +517,7 @@ static long mdpy_ioctl(struct mdev_device *mdev, unsigned int cmd,
if (info.argsz < minsz)
return -EINVAL;
- ret = mdpy_get_device_info(mdev, &info);
+ ret = mdpy_get_device_info(&info);
if (ret)
return ret;
@@ -543,7 +542,7 @@ static long mdpy_ioctl(struct mdev_device *mdev, unsigned int cmd,
if (info.argsz < minsz)
return -EINVAL;
- ret = mdpy_get_region_info(mdev, &info, &cap_type_id,
+ ret = mdpy_get_region_info(mdev_state, &info, &cap_type_id,
&cap_type);
if (ret)
return ret;
@@ -567,7 +566,7 @@ static long mdpy_ioctl(struct mdev_device *mdev, unsigned int cmd,
(info.index >= mdev_state->dev_info.num_irqs))
return -EINVAL;
- ret = mdpy_get_irq_info(mdev, &info);
+ ret = mdpy_get_irq_info(&info);
if (ret)
return ret;
@@ -590,7 +589,7 @@ static long mdpy_ioctl(struct mdev_device *mdev, unsigned int cmd,
if (plane.argsz < minsz)
return -EINVAL;
- ret = mdpy_query_gfx_plane(mdev, &plane);
+ ret = mdpy_query_gfx_plane(mdev_state, &plane);
if (ret)
return ret;
@@ -604,12 +603,12 @@ static long mdpy_ioctl(struct mdev_device *mdev, unsigned int cmd,
return -EINVAL;
case VFIO_DEVICE_RESET:
- return mdpy_reset(mdev);
+ return mdpy_reset(mdev_state);
}
return -ENOTTY;
}
-static int mdpy_open(struct mdev_device *mdev)
+static int mdpy_open(struct vfio_device *vdev)
{
if (!try_module_get(THIS_MODULE))
return -ENODEV;
@@ -617,7 +616,7 @@ static int mdpy_open(struct mdev_device *mdev)
return 0;
}
-static void mdpy_close(struct mdev_device *mdev)
+static void mdpy_close(struct vfio_device *vdev)
{
module_put(THIS_MODULE);
}
@@ -626,8 +625,7 @@ static ssize_t
resolution_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
- struct mdev_device *mdev = mdev_from_dev(dev);
- struct mdev_state *mdev_state = mdev_get_drvdata(mdev);
+ struct mdev_state *mdev_state = dev_get_drvdata(dev);
return sprintf(buf, "%dx%d\n",
mdev_state->type->width,
@@ -716,18 +714,30 @@ static struct attribute_group *mdev_type_groups[] = {
NULL,
};
+static const struct vfio_device_ops mdpy_dev_ops = {
+ .open = mdpy_open,
+ .release = mdpy_close,
+ .read = mdpy_read,
+ .write = mdpy_write,
+ .ioctl = mdpy_ioctl,
+ .mmap = mdpy_mmap,
+};
+
+static struct mdev_driver mdpy_driver = {
+ .driver = {
+ .name = "mdpy",
+ .owner = THIS_MODULE,
+ .mod_name = KBUILD_MODNAME,
+ .dev_groups = mdev_dev_groups,
+ },
+ .probe = mdpy_probe,
+ .remove = mdpy_remove,
+};
+
static const struct mdev_parent_ops mdev_fops = {
.owner = THIS_MODULE,
- .mdev_attr_groups = mdev_dev_groups,
+ .device_driver = &mdpy_driver,
.supported_type_groups = mdev_type_groups,
- .create = mdpy_create,
- .remove = mdpy_remove,
- .open = mdpy_open,
- .release = mdpy_close,
- .read = mdpy_read,
- .write = mdpy_write,
- .ioctl = mdpy_ioctl,
- .mmap = mdpy_mmap,
};
static const struct file_operations vd_fops = {
@@ -752,11 +762,15 @@ static int __init mdpy_dev_init(void)
cdev_add(&mdpy_cdev, mdpy_devt, MINORMASK + 1);
pr_info("%s: major %d\n", __func__, MAJOR(mdpy_devt));
+ ret = mdev_register_driver(&mdpy_driver);
+ if (ret)
+ goto err_cdev;
+
mdpy_class = class_create(THIS_MODULE, MDPY_CLASS_NAME);
if (IS_ERR(mdpy_class)) {
pr_err("Error: failed to register mdpy_dev class\n");
ret = PTR_ERR(mdpy_class);
- goto failed1;
+ goto err_driver;
}
mdpy_dev.class = mdpy_class;
mdpy_dev.release = mdpy_device_release;
@@ -764,19 +778,21 @@ static int __init mdpy_dev_init(void)
ret = device_register(&mdpy_dev);
if (ret)
- goto failed2;
+ goto err_class;
ret = mdev_register_device(&mdpy_dev, &mdev_fops);
if (ret)
- goto failed3;
+ goto err_device;
return 0;
-failed3:
+err_device:
device_unregister(&mdpy_dev);
-failed2:
+err_class:
class_destroy(mdpy_class);
-failed1:
+err_driver:
+ mdev_unregister_driver(&mdpy_driver);
+err_cdev:
cdev_del(&mdpy_cdev);
unregister_chrdev_region(mdpy_devt, MINORMASK + 1);
return ret;
@@ -788,6 +804,7 @@ static void __exit mdpy_dev_exit(void)
mdev_unregister_device(&mdpy_dev);
device_unregister(&mdpy_dev);
+ mdev_unregister_driver(&mdpy_driver);
cdev_del(&mdpy_cdev);
unregister_chrdev_region(mdpy_devt, MINORMASK + 1);
class_destroy(mdpy_class);
diff --git a/samples/vfio-mdev/mtty.c b/samples/vfio-mdev/mtty.c
index b9b24be4abda..faf9b8e8873a 100644
--- a/samples/vfio-mdev/mtty.c
+++ b/samples/vfio-mdev/mtty.c
@@ -127,6 +127,7 @@ struct serial_port {
/* State of each mdev device */
struct mdev_state {
+ struct vfio_device vdev;
int irq_fd;
struct eventfd_ctx *intx_evtfd;
struct eventfd_ctx *msi_evtfd;
@@ -150,6 +151,8 @@ static const struct file_operations vd_fops = {
.owner = THIS_MODULE,
};
+static const struct vfio_device_ops mtty_dev_ops;
+
/* function prototypes */
static int mtty_trigger_interrupt(struct mdev_state *mdev_state);
@@ -631,22 +634,15 @@ static void mdev_read_base(struct mdev_state *mdev_state)
}
}
-static ssize_t mdev_access(struct mdev_device *mdev, u8 *buf, size_t count,
+static ssize_t mdev_access(struct mdev_state *mdev_state, u8 *buf, size_t count,
loff_t pos, bool is_write)
{
- struct mdev_state *mdev_state;
unsigned int index;
loff_t offset;
int ret = 0;
- if (!mdev || !buf)
- return -EINVAL;
-
- mdev_state = mdev_get_drvdata(mdev);
- if (!mdev_state) {
- pr_err("%s mdev_state not found\n", __func__);
+ if (!buf)
return -EINVAL;
- }
mutex_lock(&mdev_state->ops_lock);
@@ -708,15 +704,18 @@ accessfailed:
return ret;
}
-static int mtty_create(struct mdev_device *mdev)
+static int mtty_probe(struct mdev_device *mdev)
{
struct mdev_state *mdev_state;
int nr_ports = mdev_get_type_group_id(mdev) + 1;
+ int ret;
mdev_state = kzalloc(sizeof(struct mdev_state), GFP_KERNEL);
if (mdev_state == NULL)
return -ENOMEM;
+ vfio_init_group_dev(&mdev_state->vdev, &mdev->dev, &mtty_dev_ops);
+
mdev_state->nr_ports = nr_ports;
mdev_state->irq_index = -1;
mdev_state->s[0].max_fifo_size = MAX_FIFO_SIZE;
@@ -731,7 +730,6 @@ static int mtty_create(struct mdev_device *mdev)
mutex_init(&mdev_state->ops_lock);
mdev_state->mdev = mdev;
- mdev_set_drvdata(mdev, mdev_state);
mtty_create_config_space(mdev_state);
@@ -739,50 +737,40 @@ static int mtty_create(struct mdev_device *mdev)
list_add(&mdev_state->next, &mdev_devices_list);
mutex_unlock(&mdev_list_lock);
+ ret = vfio_register_group_dev(&mdev_state->vdev);
+ if (ret) {
+ kfree(mdev_state);
+ return ret;
+ }
+ dev_set_drvdata(&mdev->dev, mdev_state);
return 0;
}
-static int mtty_remove(struct mdev_device *mdev)
+static void mtty_remove(struct mdev_device *mdev)
{
- struct mdev_state *mds, *tmp_mds;
- struct mdev_state *mdev_state = mdev_get_drvdata(mdev);
- int ret = -EINVAL;
+ struct mdev_state *mdev_state = dev_get_drvdata(&mdev->dev);
+ vfio_unregister_group_dev(&mdev_state->vdev);
mutex_lock(&mdev_list_lock);
- list_for_each_entry_safe(mds, tmp_mds, &mdev_devices_list, next) {
- if (mdev_state == mds) {
- list_del(&mdev_state->next);
- mdev_set_drvdata(mdev, NULL);
- kfree(mdev_state->vconfig);
- kfree(mdev_state);
- ret = 0;
- break;
- }
- }
+ list_del(&mdev_state->next);
mutex_unlock(&mdev_list_lock);
- return ret;
+ kfree(mdev_state->vconfig);
+ kfree(mdev_state);
}
-static int mtty_reset(struct mdev_device *mdev)
+static int mtty_reset(struct mdev_state *mdev_state)
{
- struct mdev_state *mdev_state;
-
- if (!mdev)
- return -EINVAL;
-
- mdev_state = mdev_get_drvdata(mdev);
- if (!mdev_state)
- return -EINVAL;
-
pr_info("%s: called\n", __func__);
return 0;
}
-static ssize_t mtty_read(struct mdev_device *mdev, char __user *buf,
+static ssize_t mtty_read(struct vfio_device *vdev, char __user *buf,
size_t count, loff_t *ppos)
{
+ struct mdev_state *mdev_state =
+ container_of(vdev, struct mdev_state, vdev);
unsigned int done = 0;
int ret;
@@ -792,7 +780,7 @@ static ssize_t mtty_read(struct mdev_device *mdev, char __user *buf,
if (count >= 4 && !(*ppos % 4)) {
u32 val;
- ret = mdev_access(mdev, (u8 *)&val, sizeof(val),
+ ret = mdev_access(mdev_state, (u8 *)&val, sizeof(val),
*ppos, false);
if (ret <= 0)
goto read_err;
@@ -804,7 +792,7 @@ static ssize_t mtty_read(struct mdev_device *mdev, char __user *buf,
} else if (count >= 2 && !(*ppos % 2)) {
u16 val;
- ret = mdev_access(mdev, (u8 *)&val, sizeof(val),
+ ret = mdev_access(mdev_state, (u8 *)&val, sizeof(val),
*ppos, false);
if (ret <= 0)
goto read_err;
@@ -816,7 +804,7 @@ static ssize_t mtty_read(struct mdev_device *mdev, char __user *buf,
} else {
u8 val;
- ret = mdev_access(mdev, (u8 *)&val, sizeof(val),
+ ret = mdev_access(mdev_state, (u8 *)&val, sizeof(val),
*ppos, false);
if (ret <= 0)
goto read_err;
@@ -839,9 +827,11 @@ read_err:
return -EFAULT;
}
-static ssize_t mtty_write(struct mdev_device *mdev, const char __user *buf,
+static ssize_t mtty_write(struct vfio_device *vdev, const char __user *buf,
size_t count, loff_t *ppos)
{
+ struct mdev_state *mdev_state =
+ container_of(vdev, struct mdev_state, vdev);
unsigned int done = 0;
int ret;
@@ -854,7 +844,7 @@ static ssize_t mtty_write(struct mdev_device *mdev, const char __user *buf,
if (copy_from_user(&val, buf, sizeof(val)))
goto write_err;
- ret = mdev_access(mdev, (u8 *)&val, sizeof(val),
+ ret = mdev_access(mdev_state, (u8 *)&val, sizeof(val),
*ppos, true);
if (ret <= 0)
goto write_err;
@@ -866,7 +856,7 @@ static ssize_t mtty_write(struct mdev_device *mdev, const char __user *buf,
if (copy_from_user(&val, buf, sizeof(val)))
goto write_err;
- ret = mdev_access(mdev, (u8 *)&val, sizeof(val),
+ ret = mdev_access(mdev_state, (u8 *)&val, sizeof(val),
*ppos, true);
if (ret <= 0)
goto write_err;
@@ -878,7 +868,7 @@ static ssize_t mtty_write(struct mdev_device *mdev, const char __user *buf,
if (copy_from_user(&val, buf, sizeof(val)))
goto write_err;
- ret = mdev_access(mdev, (u8 *)&val, sizeof(val),
+ ret = mdev_access(mdev_state, (u8 *)&val, sizeof(val),
*ppos, true);
if (ret <= 0)
goto write_err;
@@ -896,19 +886,11 @@ write_err:
return -EFAULT;
}
-static int mtty_set_irqs(struct mdev_device *mdev, uint32_t flags,
+static int mtty_set_irqs(struct mdev_state *mdev_state, uint32_t flags,
unsigned int index, unsigned int start,
unsigned int count, void *data)
{
int ret = 0;
- struct mdev_state *mdev_state;
-
- if (!mdev)
- return -EINVAL;
-
- mdev_state = mdev_get_drvdata(mdev);
- if (!mdev_state)
- return -EINVAL;
mutex_lock(&mdev_state->ops_lock);
switch (index) {
@@ -1024,21 +1006,13 @@ static int mtty_trigger_interrupt(struct mdev_state *mdev_state)
return ret;
}
-static int mtty_get_region_info(struct mdev_device *mdev,
+static int mtty_get_region_info(struct mdev_state *mdev_state,
struct vfio_region_info *region_info,
u16 *cap_type_id, void **cap_type)
{
unsigned int size = 0;
- struct mdev_state *mdev_state;
u32 bar_index;
- if (!mdev)
- return -EINVAL;
-
- mdev_state = mdev_get_drvdata(mdev);
- if (!mdev_state)
- return -EINVAL;
-
bar_index = region_info->index;
if (bar_index >= VFIO_PCI_NUM_REGIONS)
return -EINVAL;
@@ -1073,8 +1047,7 @@ static int mtty_get_region_info(struct mdev_device *mdev,
return 0;
}
-static int mtty_get_irq_info(struct mdev_device *mdev,
- struct vfio_irq_info *irq_info)
+static int mtty_get_irq_info(struct vfio_irq_info *irq_info)
{
switch (irq_info->index) {
case VFIO_PCI_INTX_IRQ_INDEX:
@@ -1098,8 +1071,7 @@ static int mtty_get_irq_info(struct mdev_device *mdev,
return 0;
}
-static int mtty_get_device_info(struct mdev_device *mdev,
- struct vfio_device_info *dev_info)
+static int mtty_get_device_info(struct vfio_device_info *dev_info)
{
dev_info->flags = VFIO_DEVICE_FLAGS_PCI;
dev_info->num_regions = VFIO_PCI_NUM_REGIONS;
@@ -1108,19 +1080,13 @@ static int mtty_get_device_info(struct mdev_device *mdev,
return 0;
}
-static long mtty_ioctl(struct mdev_device *mdev, unsigned int cmd,
+static long mtty_ioctl(struct vfio_device *vdev, unsigned int cmd,
unsigned long arg)
{
+ struct mdev_state *mdev_state =
+ container_of(vdev, struct mdev_state, vdev);
int ret = 0;
unsigned long minsz;
- struct mdev_state *mdev_state;
-
- if (!mdev)
- return -EINVAL;
-
- mdev_state = mdev_get_drvdata(mdev);
- if (!mdev_state)
- return -ENODEV;
switch (cmd) {
case VFIO_DEVICE_GET_INFO:
@@ -1135,7 +1101,7 @@ static long mtty_ioctl(struct mdev_device *mdev, unsigned int cmd,
if (info.argsz < minsz)
return -EINVAL;
- ret = mtty_get_device_info(mdev, &info);
+ ret = mtty_get_device_info(&info);
if (ret)
return ret;
@@ -1160,7 +1126,7 @@ static long mtty_ioctl(struct mdev_device *mdev, unsigned int cmd,
if (info.argsz < minsz)
return -EINVAL;
- ret = mtty_get_region_info(mdev, &info, &cap_type_id,
+ ret = mtty_get_region_info(mdev_state, &info, &cap_type_id,
&cap_type);
if (ret)
return ret;
@@ -1184,7 +1150,7 @@ static long mtty_ioctl(struct mdev_device *mdev, unsigned int cmd,
(info.index >= mdev_state->dev_info.num_irqs))
return -EINVAL;
- ret = mtty_get_irq_info(mdev, &info);
+ ret = mtty_get_irq_info(&info);
if (ret)
return ret;
@@ -1218,25 +1184,25 @@ static long mtty_ioctl(struct mdev_device *mdev, unsigned int cmd,
return PTR_ERR(data);
}
- ret = mtty_set_irqs(mdev, hdr.flags, hdr.index, hdr.start,
+ ret = mtty_set_irqs(mdev_state, hdr.flags, hdr.index, hdr.start,
hdr.count, data);
kfree(ptr);
return ret;
}
case VFIO_DEVICE_RESET:
- return mtty_reset(mdev);
+ return mtty_reset(mdev_state);
}
return -ENOTTY;
}
-static int mtty_open(struct mdev_device *mdev)
+static int mtty_open(struct vfio_device *vdev)
{
pr_info("%s\n", __func__);
return 0;
}
-static void mtty_close(struct mdev_device *mdev)
+static void mtty_close(struct vfio_device *mdev)
{
pr_info("%s\n", __func__);
}
@@ -1351,18 +1317,31 @@ static struct attribute_group *mdev_type_groups[] = {
NULL,
};
+static const struct vfio_device_ops mtty_dev_ops = {
+ .name = "vfio-mtty",
+ .open = mtty_open,
+ .release = mtty_close,
+ .read = mtty_read,
+ .write = mtty_write,
+ .ioctl = mtty_ioctl,
+};
+
+static struct mdev_driver mtty_driver = {
+ .driver = {
+ .name = "mtty",
+ .owner = THIS_MODULE,
+ .mod_name = KBUILD_MODNAME,
+ .dev_groups = mdev_dev_groups,
+ },
+ .probe = mtty_probe,
+ .remove = mtty_remove,
+};
+
static const struct mdev_parent_ops mdev_fops = {
.owner = THIS_MODULE,
+ .device_driver = &mtty_driver,
.dev_attr_groups = mtty_dev_groups,
- .mdev_attr_groups = mdev_dev_groups,
.supported_type_groups = mdev_type_groups,
- .create = mtty_create,
- .remove = mtty_remove,
- .open = mtty_open,
- .release = mtty_close,
- .read = mtty_read,
- .write = mtty_write,
- .ioctl = mtty_ioctl,
};
static void mtty_device_release(struct device *dev)
@@ -1393,12 +1372,16 @@ static int __init mtty_dev_init(void)
pr_info("major_number:%d\n", MAJOR(mtty_dev.vd_devt));
+ ret = mdev_register_driver(&mtty_driver);
+ if (ret)
+ goto err_cdev;
+
mtty_dev.vd_class = class_create(THIS_MODULE, MTTY_CLASS_NAME);
if (IS_ERR(mtty_dev.vd_class)) {
pr_err("Error: failed to register mtty_dev class\n");
ret = PTR_ERR(mtty_dev.vd_class);
- goto failed1;
+ goto err_driver;
}
mtty_dev.dev.class = mtty_dev.vd_class;
@@ -1407,28 +1390,25 @@ static int __init mtty_dev_init(void)
ret = device_register(&mtty_dev.dev);
if (ret)
- goto failed2;
+ goto err_class;
ret = mdev_register_device(&mtty_dev.dev, &mdev_fops);
if (ret)
- goto failed3;
+ goto err_device;
mutex_init(&mdev_list_lock);
INIT_LIST_HEAD(&mdev_devices_list);
+ return 0;
- goto all_done;
-
-failed3:
-
+err_device:
device_unregister(&mtty_dev.dev);
-failed2:
+err_class:
class_destroy(mtty_dev.vd_class);
-
-failed1:
+err_driver:
+ mdev_unregister_driver(&mtty_driver);
+err_cdev:
cdev_del(&mtty_dev.vd_cdev);
unregister_chrdev_region(mtty_dev.vd_devt, MINORMASK + 1);
-
-all_done:
return ret;
}
@@ -1439,6 +1419,7 @@ static void __exit mtty_dev_exit(void)
device_unregister(&mtty_dev.dev);
idr_destroy(&mtty_dev.vd_idr);
+ mdev_unregister_driver(&mtty_driver);
cdev_del(&mtty_dev.vd_cdev);
unregister_chrdev_region(mtty_dev.vd_devt, MINORMASK + 1);
class_destroy(mtty_dev.vd_class);