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From: Cornelia Huck <cohuck@redhat.com>
To: Tony Krowiak <akrowiak@linux.ibm.com>
Cc: linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org,
	kvm@vger.kernel.org, freude@linux.ibm.com,
	borntraeger@de.ibm.com, frankja@linux.ibm.com, david@redhat.com,
	mjrosato@linux.ibm.com, schwidefsky@de.ibm.com,
	heiko.carstens@de.ibm.com, pmorel@linux.ibm.com,
	pasic@linux.ibm.com, alex.williamson@redhat.com,
	kwankhede@nvidia.com
Subject: Re: [PATCH v4 1/7] s390: vfio-ap: Refactor vfio_ap driver probe and remove callbacks
Date: Tue, 18 Jun 2019 18:14:56 +0200
Message-ID: <20190618181456.0252227b.cohuck@redhat.com> (raw)
In-Reply-To: <1560454780-20359-2-git-send-email-akrowiak@linux.ibm.com>

On Thu, 13 Jun 2019 15:39:34 -0400
Tony Krowiak <akrowiak@linux.ibm.com> wrote:

> In order to limit the number of private mdev functions called from the
> vfio_ap device driver as well as to provide a landing spot for dynamic
> configuration code related to binding/unbinding AP queue devices to/from
> the vfio_ap driver, the following changes are being introduced:
> 
> * Move code from the vfio_ap driver's probe callback into a function
>   defined in the mdev private operations file.
> 
> * Move code from the vfio_ap driver's remove callback into a function
>   defined in the mdev private operations file.
> 
> Signed-off-by: Tony Krowiak <akrowiak@linux.ibm.com>
> ---
>  drivers/s390/crypto/vfio_ap_drv.c     | 27 ++++++++++-----------------
>  drivers/s390/crypto/vfio_ap_ops.c     | 28 ++++++++++++++++++++++++++++
>  drivers/s390/crypto/vfio_ap_private.h |  6 +++---
>  3 files changed, 41 insertions(+), 20 deletions(-)
> 
> diff --git a/drivers/s390/crypto/vfio_ap_drv.c b/drivers/s390/crypto/vfio_ap_drv.c
> index 003662aa8060..3c60df70891b 100644
> --- a/drivers/s390/crypto/vfio_ap_drv.c
> +++ b/drivers/s390/crypto/vfio_ap_drv.c
> @@ -49,15 +49,15 @@ MODULE_DEVICE_TABLE(vfio_ap, ap_queue_ids);
>   */
>  static int vfio_ap_queue_dev_probe(struct ap_device *apdev)
>  {
> -	struct vfio_ap_queue *q;
> -
> -	q = kzalloc(sizeof(*q), GFP_KERNEL);
> -	if (!q)
> -		return -ENOMEM;
> -	dev_set_drvdata(&apdev->device, q);
> -	q->apqn = to_ap_queue(&apdev->device)->qid;
> -	q->saved_isc = VFIO_AP_ISC_INVALID;
> +	int ret;
> +	struct ap_queue *queue = to_ap_queue(&apdev->device);
> +
> +	ret = vfio_ap_mdev_probe_queue(queue);
> +	if (ret)
> +		return ret;
> +
>  	return 0;
> +

Maybe you could even condense this into a simple

return vfio_ap_mdev_probe_queue(to_ap_queue(&apdev->device));

(Unless you plan to do more things with queue in a future patch, of
course.)

>  }
>  
>  /**

(...)

> diff --git a/drivers/s390/crypto/vfio_ap_private.h b/drivers/s390/crypto/vfio_ap_private.h
> index f46dde56b464..5cc3c2ebf151 100644
> --- a/drivers/s390/crypto/vfio_ap_private.h
> +++ b/drivers/s390/crypto/vfio_ap_private.h
> @@ -90,8 +90,6 @@ struct ap_matrix_mdev {
>  
>  extern int vfio_ap_mdev_register(void);
>  extern void vfio_ap_mdev_unregister(void);
> -int vfio_ap_mdev_reset_queue(unsigned int apid, unsigned int apqi,
> -			     unsigned int retry);

If you don't need that function across files anymore, you probably want
to make it static.

>  
>  struct vfio_ap_queue {
>  	struct ap_matrix_mdev *matrix_mdev;
> @@ -100,5 +98,7 @@ struct vfio_ap_queue {
>  #define VFIO_AP_ISC_INVALID 0xff
>  	unsigned char saved_isc;
>  };
> -struct ap_queue_status vfio_ap_irq_disable(struct vfio_ap_queue *q);

Same here.

> +int vfio_ap_mdev_probe_queue(struct ap_queue *queue);
> +void vfio_ap_mdev_remove_queue(struct ap_queue *queue);
> +
>  #endif /* _VFIO_AP_PRIVATE_H_ */


  parent reply index

Thread overview: 32+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-06-13 19:39 [PATCH v4 0/7] s390: vfio-ap: dynamic configuration support Tony Krowiak
2019-06-13 19:39 ` [PATCH v4 1/7] s390: vfio-ap: Refactor vfio_ap driver probe and remove callbacks Tony Krowiak
2019-06-17  8:27   ` Harald Freudenberger
2019-06-17 14:24     ` Tony Krowiak
2019-06-18 16:14   ` Cornelia Huck [this message]
2019-06-19 12:31     ` Tony Krowiak
2019-06-13 19:39 ` [PATCH v4 2/7] s390: vfio-ap: wait for queue empty on queue reset Tony Krowiak
2019-06-17  8:47   ` Harald Freudenberger
2019-06-17 14:29     ` Tony Krowiak
2019-06-13 19:39 ` [PATCH v4 3/7] s390: zcrypt: driver callback to indicate resource in use Tony Krowiak
2019-06-17  9:28   ` Harald Freudenberger
2019-06-17 14:37     ` Tony Krowiak
2019-06-18 16:25   ` Cornelia Huck
2019-06-19 13:04     ` Tony Krowiak
2019-06-26 21:13       ` Tony Krowiak
2019-06-27  7:25         ` Cornelia Huck
2019-06-27 12:59           ` Tony Krowiak
2019-07-01 19:26       ` Cornelia Huck
2019-07-08 14:27         ` Tony Krowiak
2019-07-09 10:49           ` Cornelia Huck
2019-07-09 21:11             ` Tony Krowiak
2019-06-13 19:39 ` [PATCH v4 4/7] s390: vfio-ap: implement in-use callback for vfio_ap driver Tony Krowiak
2019-06-13 19:39 ` [PATCH v4 5/7] s390: vfio-ap: allow assignment of unavailable AP resources to mdev device Tony Krowiak
2019-06-17 10:05   ` Harald Freudenberger
2019-06-17 15:07     ` Tony Krowiak
2019-06-18  6:49       ` Harald Freudenberger
2019-06-19 13:39         ` Tony Krowiak
2019-06-13 19:39 ` [PATCH v4 6/7] s390: vfio-ap: allow hot plug/unplug of AP resources using " Tony Krowiak
2019-06-13 19:39 ` [PATCH v4 7/7] s390: vfio-ap: update documentation Tony Krowiak
2019-06-17 11:42   ` Harald Freudenberger
2019-06-17 15:21     ` Tony Krowiak
2019-07-09 15:30 ` [PATCH v4 0/7] s390: vfio-ap: dynamic configuration support Halil Pasic

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