[6/9] rpmsg: virtio: use rpmsg ns device for the ns announcement
diff mbox series

Message ID 20200731114732.12815-7-arnaud.pouliquen@st.com
State Superseded
Headers show
Series
  • introduce name service announcement rpmsg driver
Related show

Commit Message

Arnaud POULIQUEN July 31, 2020, 11:47 a.m. UTC
As generic NS driver is available, rely on it for NS management instead of
managing it in RPMsg virtio bus.

Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@st.com>
---
 drivers/rpmsg/Kconfig            |  1 +
 drivers/rpmsg/virtio_rpmsg_bus.c | 86 ++++++++------------------------
 2 files changed, 21 insertions(+), 66 deletions(-)

Comments

Mathieu Poirier Aug. 24, 2020, 10:48 p.m. UTC | #1
On Fri, Jul 31, 2020 at 01:47:29PM +0200, Arnaud Pouliquen wrote:
> As generic NS driver is available, rely on it for NS management instead of
> managing it in RPMsg virtio bus.
> 
> Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@st.com>
> ---
>  drivers/rpmsg/Kconfig            |  1 +
>  drivers/rpmsg/virtio_rpmsg_bus.c | 86 ++++++++------------------------
>  2 files changed, 21 insertions(+), 66 deletions(-)
> 
> diff --git a/drivers/rpmsg/Kconfig b/drivers/rpmsg/Kconfig
> index 140faa975ea1..0143c9864c45 100644
> --- a/drivers/rpmsg/Kconfig
> +++ b/drivers/rpmsg/Kconfig
> @@ -71,5 +71,6 @@ config RPMSG_VIRTIO
>  	depends on HAS_DMA
>  	select RPMSG
>  	select VIRTIO
> +	select RPMSG_NS
>  
>  endmenu
> diff --git a/drivers/rpmsg/virtio_rpmsg_bus.c b/drivers/rpmsg/virtio_rpmsg_bus.c
> index b2927661868c..f771fdae150e 100644
> --- a/drivers/rpmsg/virtio_rpmsg_bus.c
> +++ b/drivers/rpmsg/virtio_rpmsg_bus.c
> @@ -48,7 +48,6 @@
>   * @endpoints_lock: lock of the endpoints set
>   * @sendq:	wait queue of sending contexts waiting for a tx buffers
>   * @sleepers:	number of senders that are waiting for a tx buffer
> - * @ns_ept:	the bus's name service endpoint
>   *
>   * This structure stores the rpmsg state of a given virtio remote processor
>   * device (there might be several virtio proc devices for each physical
> @@ -67,7 +66,6 @@ struct virtproc_info {
>  	struct mutex endpoints_lock;
>  	wait_queue_head_t sendq;
>  	atomic_t sleepers;
> -	struct rpmsg_endpoint *ns_ept;
>  };
>  
>  /* The feature bitmap for virtio rpmsg */
> @@ -841,68 +839,14 @@ static void rpmsg_xmit_done(struct virtqueue *svq)
>  	wake_up_interruptible(&vrp->sendq);
>  }
>  
> -/* invoked when a name service announcement arrives */
> -static int rpmsg_ns_cb(struct rpmsg_device *rpdev, void *data, int len,
> -		       void *priv, u32 src)
> -{
> -	struct rpmsg_ns_msg *msg = data;
> -	struct rpmsg_device *newch;
> -	struct rpmsg_channel_info chinfo;
> -	struct virtproc_info *vrp = priv;
> -	struct device *dev = &vrp->vdev->dev;
> -	int ret;
> -
> -#if defined(CONFIG_DYNAMIC_DEBUG)
> -	dynamic_hex_dump("NS announcement: ", DUMP_PREFIX_NONE, 16, 1,
> -			 data, len, true);
> -#endif
> -
> -	if (len != sizeof(*msg)) {
> -		dev_err(dev, "malformed ns msg (%d)\n", len);
> -		return -EINVAL;
> -	}
> -
> -	/*
> -	 * the name service ept does _not_ belong to a real rpmsg channel,
> -	 * and is handled by the rpmsg bus itself.
> -	 * for sanity reasons, make sure a valid rpdev has _not_ sneaked
> -	 * in somehow.
> -	 */
> -	if (rpdev) {
> -		dev_err(dev, "anomaly: ns ept has an rpdev handle\n");
> -		return -EINVAL;
> -	}
> -
> -	/* don't trust the remote processor for null terminating the name */
> -	msg->name[RPMSG_NAME_SIZE - 1] = '\0';
> -
> -	strncpy(chinfo.name, msg->name, sizeof(chinfo.name));
> -	chinfo.src = RPMSG_ADDR_ANY;
> -	chinfo.dst = virtio32_to_cpu(vrp->vdev, msg->addr);
> -
> -	dev_info(dev, "%sing channel %s addr 0x%x\n",
> -		 virtio32_to_cpu(vrp->vdev, msg->flags) & RPMSG_NS_DESTROY ?
> -		 "destroy" : "creat", msg->name, chinfo.dst);
> -
> -	if (virtio32_to_cpu(vrp->vdev, msg->flags) & RPMSG_NS_DESTROY) {
> -		ret = rpmsg_unregister_device(&vrp->vdev->dev, &chinfo);
> -		if (ret)
> -			dev_err(dev, "rpmsg_destroy_channel failed: %d\n", ret);
> -	} else {
> -		newch = __rpmsg_create_channel(vrp, &chinfo);
> -		if (!newch)
> -			dev_err(dev, "rpmsg_create_channel failed\n");
> -	}
> -
> -	return 0;
> -}
> -
>  static int rpmsg_probe(struct virtio_device *vdev)
>  {
>  	vq_callback_t *vq_cbs[] = { rpmsg_recv_done, rpmsg_xmit_done };
>  	static const char * const names[] = { "input", "output" };
>  	struct virtqueue *vqs[2];
>  	struct virtproc_info *vrp;
> +	struct virtio_rpmsg_channel *vch;
> +	struct rpmsg_device *rpdev_ns;
>  	void *bufs_va;
>  	int err = 0, i;
>  	size_t total_buf_space;
> @@ -978,14 +922,27 @@ static int rpmsg_probe(struct virtio_device *vdev)
>  
>  	/* if supported by the remote processor, enable the name service */
>  	if (virtio_has_feature(vdev, VIRTIO_RPMSG_F_NS)) {
> -		/* a dedicated endpoint handles the name service msgs */
> -		vrp->ns_ept = __rpmsg_create_ept(vrp, NULL, rpmsg_ns_cb,
> -						vrp, RPMSG_NS_ADDR);
> -		if (!vrp->ns_ept) {
> -			dev_err(&vdev->dev, "failed to create the ns ept\n");
> +		vch = kzalloc(sizeof(*vch), GFP_KERNEL);
> +		if (!vch) {
>  			err = -ENOMEM;
>  			goto free_coherent;
>  		}
> +
> +		/* Link the channel to our vrp */
> +		vch->vrp = vrp;
> +
> +		/* Assign public information to the rpmsg_device */
> +		rpdev_ns = &vch->rpdev;
> +		rpdev_ns->ops = &virtio_rpmsg_ops;
> +
> +		rpdev_ns->dev.parent = &vrp->vdev->dev;
> +		rpdev_ns->dev.release = virtio_rpmsg_release_device;
> +
> +		err = rpmsg_ns_register_device(rpdev_ns);
> +		if (err) {
> +			kfree(vch);
> +			goto free_coherent;
> +		}

This patch doesn't apply to Bjorn's rproc-next anymore - would you mind
rebasing?

>  	}
>  
>  	/*
> @@ -1038,9 +995,6 @@ static void rpmsg_remove(struct virtio_device *vdev)
>  	if (ret)
>  		dev_warn(&vdev->dev, "can't remove rpmsg device: %d\n", ret);
>  
> -	if (vrp->ns_ept)
> -		__rpmsg_destroy_ept(vrp, vrp->ns_ept);
> -
>  	idr_destroy(&vrp->endpoints);
>  
>  	vdev->config->del_vqs(vrp->vdev);
> -- 
> 2.17.1
>
Arnaud POULIQUEN Aug. 25, 2020, 12:02 p.m. UTC | #2
On 8/25/20 12:48 AM, Mathieu Poirier wrote:
> On Fri, Jul 31, 2020 at 01:47:29PM +0200, Arnaud Pouliquen wrote:
>> As generic NS driver is available, rely on it for NS management instead of
>> managing it in RPMsg virtio bus.
>>
>> Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@st.com>
>> ---
>>  drivers/rpmsg/Kconfig            |  1 +
>>  drivers/rpmsg/virtio_rpmsg_bus.c | 86 ++++++++------------------------
>>  2 files changed, 21 insertions(+), 66 deletions(-)
>>
>> diff --git a/drivers/rpmsg/Kconfig b/drivers/rpmsg/Kconfig
>> index 140faa975ea1..0143c9864c45 100644
>> --- a/drivers/rpmsg/Kconfig
>> +++ b/drivers/rpmsg/Kconfig
>> @@ -71,5 +71,6 @@ config RPMSG_VIRTIO
>>  	depends on HAS_DMA
>>  	select RPMSG
>>  	select VIRTIO
>> +	select RPMSG_NS
>>  
>>  endmenu
>> diff --git a/drivers/rpmsg/virtio_rpmsg_bus.c b/drivers/rpmsg/virtio_rpmsg_bus.c
>> index b2927661868c..f771fdae150e 100644
>> --- a/drivers/rpmsg/virtio_rpmsg_bus.c
>> +++ b/drivers/rpmsg/virtio_rpmsg_bus.c
>> @@ -48,7 +48,6 @@
>>   * @endpoints_lock: lock of the endpoints set
>>   * @sendq:	wait queue of sending contexts waiting for a tx buffers
>>   * @sleepers:	number of senders that are waiting for a tx buffer
>> - * @ns_ept:	the bus's name service endpoint
>>   *
>>   * This structure stores the rpmsg state of a given virtio remote processor
>>   * device (there might be several virtio proc devices for each physical
>> @@ -67,7 +66,6 @@ struct virtproc_info {
>>  	struct mutex endpoints_lock;
>>  	wait_queue_head_t sendq;
>>  	atomic_t sleepers;
>> -	struct rpmsg_endpoint *ns_ept;
>>  };
>>  
>>  /* The feature bitmap for virtio rpmsg */
>> @@ -841,68 +839,14 @@ static void rpmsg_xmit_done(struct virtqueue *svq)
>>  	wake_up_interruptible(&vrp->sendq);
>>  }
>>  
>> -/* invoked when a name service announcement arrives */
>> -static int rpmsg_ns_cb(struct rpmsg_device *rpdev, void *data, int len,
>> -		       void *priv, u32 src)
>> -{
>> -	struct rpmsg_ns_msg *msg = data;
>> -	struct rpmsg_device *newch;
>> -	struct rpmsg_channel_info chinfo;
>> -	struct virtproc_info *vrp = priv;
>> -	struct device *dev = &vrp->vdev->dev;
>> -	int ret;
>> -
>> -#if defined(CONFIG_DYNAMIC_DEBUG)
>> -	dynamic_hex_dump("NS announcement: ", DUMP_PREFIX_NONE, 16, 1,
>> -			 data, len, true);
>> -#endif
>> -
>> -	if (len != sizeof(*msg)) {
>> -		dev_err(dev, "malformed ns msg (%d)\n", len);
>> -		return -EINVAL;
>> -	}
>> -
>> -	/*
>> -	 * the name service ept does _not_ belong to a real rpmsg channel,
>> -	 * and is handled by the rpmsg bus itself.
>> -	 * for sanity reasons, make sure a valid rpdev has _not_ sneaked
>> -	 * in somehow.
>> -	 */
>> -	if (rpdev) {
>> -		dev_err(dev, "anomaly: ns ept has an rpdev handle\n");
>> -		return -EINVAL;
>> -	}
>> -
>> -	/* don't trust the remote processor for null terminating the name */
>> -	msg->name[RPMSG_NAME_SIZE - 1] = '\0';
>> -
>> -	strncpy(chinfo.name, msg->name, sizeof(chinfo.name));
>> -	chinfo.src = RPMSG_ADDR_ANY;
>> -	chinfo.dst = virtio32_to_cpu(vrp->vdev, msg->addr);
>> -
>> -	dev_info(dev, "%sing channel %s addr 0x%x\n",
>> -		 virtio32_to_cpu(vrp->vdev, msg->flags) & RPMSG_NS_DESTROY ?
>> -		 "destroy" : "creat", msg->name, chinfo.dst);
>> -
>> -	if (virtio32_to_cpu(vrp->vdev, msg->flags) & RPMSG_NS_DESTROY) {
>> -		ret = rpmsg_unregister_device(&vrp->vdev->dev, &chinfo);
>> -		if (ret)
>> -			dev_err(dev, "rpmsg_destroy_channel failed: %d\n", ret);
>> -	} else {
>> -		newch = __rpmsg_create_channel(vrp, &chinfo);
>> -		if (!newch)
>> -			dev_err(dev, "rpmsg_create_channel failed\n");
>> -	}
>> -
>> -	return 0;
>> -}
>> -
>>  static int rpmsg_probe(struct virtio_device *vdev)
>>  {
>>  	vq_callback_t *vq_cbs[] = { rpmsg_recv_done, rpmsg_xmit_done };
>>  	static const char * const names[] = { "input", "output" };
>>  	struct virtqueue *vqs[2];
>>  	struct virtproc_info *vrp;
>> +	struct virtio_rpmsg_channel *vch;
>> +	struct rpmsg_device *rpdev_ns;
>>  	void *bufs_va;
>>  	int err = 0, i;
>>  	size_t total_buf_space;
>> @@ -978,14 +922,27 @@ static int rpmsg_probe(struct virtio_device *vdev)
>>  
>>  	/* if supported by the remote processor, enable the name service */
>>  	if (virtio_has_feature(vdev, VIRTIO_RPMSG_F_NS)) {
>> -		/* a dedicated endpoint handles the name service msgs */
>> -		vrp->ns_ept = __rpmsg_create_ept(vrp, NULL, rpmsg_ns_cb,
>> -						vrp, RPMSG_NS_ADDR);
>> -		if (!vrp->ns_ept) {
>> -			dev_err(&vdev->dev, "failed to create the ns ept\n");
>> +		vch = kzalloc(sizeof(*vch), GFP_KERNEL);
>> +		if (!vch) {
>>  			err = -ENOMEM;
>>  			goto free_coherent;
>>  		}
>> +
>> +		/* Link the channel to our vrp */
>> +		vch->vrp = vrp;
>> +
>> +		/* Assign public information to the rpmsg_device */
>> +		rpdev_ns = &vch->rpdev;
>> +		rpdev_ns->ops = &virtio_rpmsg_ops;
>> +
>> +		rpdev_ns->dev.parent = &vrp->vdev->dev;
>> +		rpdev_ns->dev.release = virtio_rpmsg_release_device;
>> +
>> +		err = rpmsg_ns_register_device(rpdev_ns);
>> +		if (err) {
>> +			kfree(vch);
>> +			goto free_coherent;
>> +		}
> 
> This patch doesn't apply to Bjorn's rproc-next anymore - would you mind
> rebasing?

I will base my V2 on Bjorn's for-next (ca69dba7f13a293f83b08f003cd935c6abfee249)

Thanks,
Arnaud

> 
>>  	}
>>  
>>  	/*
>> @@ -1038,9 +995,6 @@ static void rpmsg_remove(struct virtio_device *vdev)
>>  	if (ret)
>>  		dev_warn(&vdev->dev, "can't remove rpmsg device: %d\n", ret);
>>  
>> -	if (vrp->ns_ept)
>> -		__rpmsg_destroy_ept(vrp, vrp->ns_ept);
>> -
>>  	idr_destroy(&vrp->endpoints);
>>  
>>  	vdev->config->del_vqs(vrp->vdev);
>> -- 
>> 2.17.1
>>

Patch
diff mbox series

diff --git a/drivers/rpmsg/Kconfig b/drivers/rpmsg/Kconfig
index 140faa975ea1..0143c9864c45 100644
--- a/drivers/rpmsg/Kconfig
+++ b/drivers/rpmsg/Kconfig
@@ -71,5 +71,6 @@  config RPMSG_VIRTIO
 	depends on HAS_DMA
 	select RPMSG
 	select VIRTIO
+	select RPMSG_NS
 
 endmenu
diff --git a/drivers/rpmsg/virtio_rpmsg_bus.c b/drivers/rpmsg/virtio_rpmsg_bus.c
index b2927661868c..f771fdae150e 100644
--- a/drivers/rpmsg/virtio_rpmsg_bus.c
+++ b/drivers/rpmsg/virtio_rpmsg_bus.c
@@ -48,7 +48,6 @@ 
  * @endpoints_lock: lock of the endpoints set
  * @sendq:	wait queue of sending contexts waiting for a tx buffers
  * @sleepers:	number of senders that are waiting for a tx buffer
- * @ns_ept:	the bus's name service endpoint
  *
  * This structure stores the rpmsg state of a given virtio remote processor
  * device (there might be several virtio proc devices for each physical
@@ -67,7 +66,6 @@  struct virtproc_info {
 	struct mutex endpoints_lock;
 	wait_queue_head_t sendq;
 	atomic_t sleepers;
-	struct rpmsg_endpoint *ns_ept;
 };
 
 /* The feature bitmap for virtio rpmsg */
@@ -841,68 +839,14 @@  static void rpmsg_xmit_done(struct virtqueue *svq)
 	wake_up_interruptible(&vrp->sendq);
 }
 
-/* invoked when a name service announcement arrives */
-static int rpmsg_ns_cb(struct rpmsg_device *rpdev, void *data, int len,
-		       void *priv, u32 src)
-{
-	struct rpmsg_ns_msg *msg = data;
-	struct rpmsg_device *newch;
-	struct rpmsg_channel_info chinfo;
-	struct virtproc_info *vrp = priv;
-	struct device *dev = &vrp->vdev->dev;
-	int ret;
-
-#if defined(CONFIG_DYNAMIC_DEBUG)
-	dynamic_hex_dump("NS announcement: ", DUMP_PREFIX_NONE, 16, 1,
-			 data, len, true);
-#endif
-
-	if (len != sizeof(*msg)) {
-		dev_err(dev, "malformed ns msg (%d)\n", len);
-		return -EINVAL;
-	}
-
-	/*
-	 * the name service ept does _not_ belong to a real rpmsg channel,
-	 * and is handled by the rpmsg bus itself.
-	 * for sanity reasons, make sure a valid rpdev has _not_ sneaked
-	 * in somehow.
-	 */
-	if (rpdev) {
-		dev_err(dev, "anomaly: ns ept has an rpdev handle\n");
-		return -EINVAL;
-	}
-
-	/* don't trust the remote processor for null terminating the name */
-	msg->name[RPMSG_NAME_SIZE - 1] = '\0';
-
-	strncpy(chinfo.name, msg->name, sizeof(chinfo.name));
-	chinfo.src = RPMSG_ADDR_ANY;
-	chinfo.dst = virtio32_to_cpu(vrp->vdev, msg->addr);
-
-	dev_info(dev, "%sing channel %s addr 0x%x\n",
-		 virtio32_to_cpu(vrp->vdev, msg->flags) & RPMSG_NS_DESTROY ?
-		 "destroy" : "creat", msg->name, chinfo.dst);
-
-	if (virtio32_to_cpu(vrp->vdev, msg->flags) & RPMSG_NS_DESTROY) {
-		ret = rpmsg_unregister_device(&vrp->vdev->dev, &chinfo);
-		if (ret)
-			dev_err(dev, "rpmsg_destroy_channel failed: %d\n", ret);
-	} else {
-		newch = __rpmsg_create_channel(vrp, &chinfo);
-		if (!newch)
-			dev_err(dev, "rpmsg_create_channel failed\n");
-	}
-
-	return 0;
-}
-
 static int rpmsg_probe(struct virtio_device *vdev)
 {
 	vq_callback_t *vq_cbs[] = { rpmsg_recv_done, rpmsg_xmit_done };
 	static const char * const names[] = { "input", "output" };
 	struct virtqueue *vqs[2];
 	struct virtproc_info *vrp;
+	struct virtio_rpmsg_channel *vch;
+	struct rpmsg_device *rpdev_ns;
 	void *bufs_va;
 	int err = 0, i;
 	size_t total_buf_space;
@@ -978,14 +922,27 @@  static int rpmsg_probe(struct virtio_device *vdev)
 
 	/* if supported by the remote processor, enable the name service */
 	if (virtio_has_feature(vdev, VIRTIO_RPMSG_F_NS)) {
-		/* a dedicated endpoint handles the name service msgs */
-		vrp->ns_ept = __rpmsg_create_ept(vrp, NULL, rpmsg_ns_cb,
-						vrp, RPMSG_NS_ADDR);
-		if (!vrp->ns_ept) {
-			dev_err(&vdev->dev, "failed to create the ns ept\n");
+		vch = kzalloc(sizeof(*vch), GFP_KERNEL);
+		if (!vch) {
 			err = -ENOMEM;
 			goto free_coherent;
 		}
+
+		/* Link the channel to our vrp */
+		vch->vrp = vrp;
+
+		/* Assign public information to the rpmsg_device */
+		rpdev_ns = &vch->rpdev;
+		rpdev_ns->ops = &virtio_rpmsg_ops;
+
+		rpdev_ns->dev.parent = &vrp->vdev->dev;
+		rpdev_ns->dev.release = virtio_rpmsg_release_device;
+
+		err = rpmsg_ns_register_device(rpdev_ns);
+		if (err) {
+			kfree(vch);
+			goto free_coherent;
+		}
 	}
 
 	/*
@@ -1038,9 +995,6 @@  static void rpmsg_remove(struct virtio_device *vdev)
 	if (ret)
 		dev_warn(&vdev->dev, "can't remove rpmsg device: %d\n", ret);
 
-	if (vrp->ns_ept)
-		__rpmsg_destroy_ept(vrp, vrp->ns_ept);
-
 	idr_destroy(&vrp->endpoints);
 
 	vdev->config->del_vqs(vrp->vdev);