On 4/4/22 18:10, Tony Krowiak wrote:
Let's move the probe and remove callbacks into the vfio_ap_ops.c
file to keep all code related to managing queues in a single file. This
way, all functions related to queue management can be removed from the
vfio_ap_private.h header file defining the public interfaces for the
vfio_ap device driver.
Signed-off-by: Tony Krowiak <akrowiak@xxxxxxxxxxxxx>
Reviewed-by: Halil Pasic <pasic@xxxxxxxxxxxxx>
---
drivers/s390/crypto/vfio_ap_drv.c | 59 +--------------------------
drivers/s390/crypto/vfio_ap_ops.c | 31 +++++++++++++-
drivers/s390/crypto/vfio_ap_private.h | 5 ++-
3 files changed, 34 insertions(+), 61 deletions(-)
diff --git a/drivers/s390/crypto/vfio_ap_drv.c b/drivers/s390/crypto/vfio_ap_drv.c
index 29ebd54f8919..9a300dd3b6f7 100644
--- a/drivers/s390/crypto/vfio_ap_drv.c
+++ b/drivers/s390/crypto/vfio_ap_drv.c
@@ -104,64 +104,9 @@ static const struct attribute_group vfio_queue_attr_group = {
.attrs = vfio_queue_attrs,
};
-/**
- * vfio_ap_queue_dev_probe: Allocate a vfio_ap_queue structure and associate it
- * with the device as driver_data.
- *
- * @apdev: the AP device being probed
- *
- * Return: returns 0 if the probe succeeded; otherwise, returns an error if
- * storage could not be allocated for a vfio_ap_queue object or the
- * sysfs 'status' attribute could not be created for the queue device.
- */
-static int vfio_ap_queue_dev_probe(struct ap_device *apdev)
-{
- int ret;
- struct vfio_ap_queue *q;
-
- q = kzalloc(sizeof(*q), GFP_KERNEL);
- if (!q)
- return -ENOMEM;
-
- mutex_lock(&matrix_dev->lock);
- dev_set_drvdata(&apdev->device, q);
- q->apqn = to_ap_queue(&apdev->device)->qid;
- q->saved_isc = VFIO_AP_ISC_INVALID;
-
- ret = sysfs_create_group(&apdev->device.kobj, &vfio_queue_attr_group);
- if (ret) {
- dev_set_drvdata(&apdev->device, NULL);
- kfree(q);
- }
-
- mutex_unlock(&matrix_dev->lock);
-
- return ret;
-}
-
-/**
- * vfio_ap_queue_dev_remove: Free the associated vfio_ap_queue structure.
- *
- * @apdev: the AP device being removed
- *
- * Takes the matrix lock to avoid actions on this device while doing the remove.
- */
-static void vfio_ap_queue_dev_remove(struct ap_device *apdev)
-{
- struct vfio_ap_queue *q;
-
- mutex_lock(&matrix_dev->lock);
- sysfs_remove_group(&apdev->device.kobj, &vfio_queue_attr_group);
- q = dev_get_drvdata(&apdev->device);
- vfio_ap_mdev_reset_queue(q, 1);
- dev_set_drvdata(&apdev->device, NULL);
- kfree(q);
- mutex_unlock(&matrix_dev->lock);
-}
-
static struct ap_driver vfio_ap_drv = {
- .probe = vfio_ap_queue_dev_probe,
- .remove = vfio_ap_queue_dev_remove,
+ .probe = vfio_ap_mdev_probe_queue,
+ .remove = vfio_ap_mdev_remove_queue,
.ids = ap_queue_ids,
};
diff --git a/drivers/s390/crypto/vfio_ap_ops.c b/drivers/s390/crypto/vfio_ap_ops.c
index 2227919fde13..16220157dbe3 100644
--- a/drivers/s390/crypto/vfio_ap_ops.c
+++ b/drivers/s390/crypto/vfio_ap_ops.c
@@ -1314,8 +1314,7 @@ static struct vfio_ap_queue *vfio_ap_find_queue(int apqn)
return q;
}
-int vfio_ap_mdev_reset_queue(struct vfio_ap_queue *q,
- unsigned int retry)
+static int vfio_ap_mdev_reset_queue(struct vfio_ap_queue *q, unsigned int retry)
{
struct ap_queue_status status;
int ret;
@@ -1524,3 +1523,31 @@ void vfio_ap_mdev_unregister(void)
mdev_unregister_device(&matrix_dev->device);
mdev_unregister_driver(&vfio_ap_matrix_driver);
}
+
+int vfio_ap_mdev_probe_queue(struct ap_device *apdev)
+{
+ struct vfio_ap_queue *q;
+
+ q = kzalloc(sizeof(*q), GFP_KERNEL);
+ if (!q)
+ return -ENOMEM;
+ mutex_lock(&matrix_dev->lock);
+ q->apqn = to_ap_queue(&apdev->device)->qid;
+ q->saved_isc = VFIO_AP_ISC_INVALID;
+ dev_set_drvdata(&apdev->device, q);
+ mutex_unlock(&matrix_dev->lock);
+
+ return 0;
+}
+
+void vfio_ap_mdev_remove_queue(struct ap_device *apdev)
+{
+ struct vfio_ap_queue *q;
+
+ mutex_lock(&matrix_dev->lock);
+ q = dev_get_drvdata(&apdev->device);
+ vfio_ap_mdev_reset_queue(q, 1);
+ dev_set_drvdata(&apdev->device, NULL);
+ kfree(q);
+ mutex_unlock(&matrix_dev->lock);
+}
diff --git a/drivers/s390/crypto/vfio_ap_private.h b/drivers/s390/crypto/vfio_ap_private.h
index 648fcaf8104a..3cade25a1620 100644
--- a/drivers/s390/crypto/vfio_ap_private.h
+++ b/drivers/s390/crypto/vfio_ap_private.h
@@ -119,7 +119,8 @@ struct vfio_ap_queue {
int vfio_ap_mdev_register(void);
void vfio_ap_mdev_unregister(void);
-int vfio_ap_mdev_reset_queue(struct vfio_ap_queue *q,
- unsigned int retry);
+
+int vfio_ap_mdev_probe_queue(struct ap_device *queue);
+void vfio_ap_mdev_remove_queue(struct ap_device *queue);
#endif /* _VFIO_AP_PRIVATE_H_ */
With this commit, you did more than just move the probe/remove functions. You also changed
their behavior. The call to sysfs_create_group has been removed. So the following in
vfop_ap_drv.c becomes dead code:
vfio_ap_mdev_for_queue
status_show
static DEVICE_ATTR_RO(status);
vfio_queue_attrs
vfio_queue_attr_group
Is this what you intended? If so, I assume we can live without the status attribute?
If this is the case then you'll want to remove all the dead code.
--
-- Jason J. Herne (jjherne@xxxxxxxxxxxxx)
