[PATCH 0/2] net: usb: qmi_wwan: add qmap mux protocol support

[PATCH 0/2] net: usb: qmi_wwan: add qmap mux protocol support

[Daniele Palmas]

This patch adds support for qmap mux protocol available in recent
Qualcomm based modems.

The qmap mux protocol can be used for multiplexing data packets in
order to have multiple ip streams through the same physical device.

Two new sysfs files are added for adding/removing the qmap mux based
interfaces (named qmimux):

/sys/class/net/<iface>/qmi/add_mux
/sys/class/net/<iface>/qmi/del_mux

Main patch author is Bjørn Mork <bjorn-yOkvZcmFvRU@public.gmane.org>

An userspace implementation of the qmi requests needed to support
multiple ip streams is already available (namely libqmi since
version 1.18.0).

The qmap mux feature has been recently implemented in Codeaurora
gobinet out-of-kernel driver that was the inspiration for this
development.

Tests have been performed with Telit LE922A6 (PID 0x1040)

Daniele Palmas (2):
  net: usb: qmi_wwan: add qmap mux protocol support
  Documentation: ABI: testing: sysfs-class-net-qmi: add new qmap mux
    files description

 Documentation/ABI/testing/sysfs-class-net-qmi |  27 +++
 drivers/net/usb/qmi_wwan.c                    | 317 +++++++++++++++++++++++++-
 2 files changed, 343 insertions(+), 1 deletion(-)

-- 
2.8.1

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[PATCH 1/2] net: usb: qmi_wwan: add qmap mux protocol support

[Daniele Palmas]

This patch adds support for qmap mux protocol available in recent
Qualcomm based modems.

The qmap mux protocol can be used for multiplexing data packets in
order to have multiple ip streams through the same physical device.

Two new sysfs files are added for adding/removing the qmap mux based
interfaces (named qmimux):

- /sys/class/net/<iface>/qmi/add_mux
- /sys/class/net/<iface>/qmi/del_mux

Main patch author is Bjørn Mork <bjorn-yOkvZcmFvRU@public.gmane.org>

Signed-off-by: Bjørn Mork <bjorn-yOkvZcmFvRU@public.gmane.org>
Signed-off-by: Daniele Palmas <dnlplm-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
---
 drivers/net/usb/qmi_wwan.c | 317 ++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 316 insertions(+), 1 deletion(-)

diff --git a/drivers/net/usb/qmi_wwan.c b/drivers/net/usb/qmi_wwan.c
index 8056745..55f2303 100644
--- a/drivers/net/usb/qmi_wwan.c
+++ b/drivers/net/usb/qmi_wwan.c
@@ -58,12 +58,198 @@ struct qmi_wwan_state {
 
 enum qmi_wwan_flags {
 	QMI_WWAN_FLAG_RAWIP = 1 << 0,
+	QMI_WWAN_FLAG_MUX = 1 << 1,
 };
 
 enum qmi_wwan_quirks {
 	QMI_WWAN_QUIRK_DTR = 1 << 0,	/* needs "set DTR" request */
 };
 
+struct qmimux_hdr {
+	u8 pad;
+	u8 mux_id;
+	__be16 pkt_len;
+};
+
+struct qmimux_priv {
+	struct net_device *real_dev;
+	u8 mux_id;
+};
+
+static int qmimux_open(struct net_device *dev)
+{
+	struct qmimux_priv *priv = netdev_priv(dev);
+	struct net_device *real_dev = priv->real_dev;
+
+	if (!(priv->real_dev->flags & IFF_UP))
+		return -ENETDOWN;
+
+	if (netif_carrier_ok(real_dev))
+		netif_carrier_on(dev);
+	return 0;
+}
+
+static int qmimux_stop(struct net_device *dev)
+{
+	netif_carrier_off(dev);
+	return 0;
+}
+
+static netdev_tx_t qmimux_start_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+	struct qmimux_priv *priv = netdev_priv(dev);
+	unsigned int len = skb->len;
+	struct qmimux_hdr *hdr;
+
+	hdr = (struct qmimux_hdr *)skb_push(skb, sizeof(struct qmimux_hdr));
+	hdr->pad = 0;
+	hdr->mux_id = priv->mux_id;
+	hdr->pkt_len = cpu_to_be16(len);
+	skb->dev = priv->real_dev;
+	return dev_queue_xmit(skb);
+}
+
+static const struct net_device_ops qmimux_netdev_ops = {
+	.ndo_open       = qmimux_open,
+	.ndo_stop       = qmimux_stop,
+	.ndo_start_xmit = qmimux_start_xmit,
+};
+
+static void qmimux_setup(struct net_device *dev)
+{
+	dev->header_ops      = NULL;  /* No header */
+	dev->type            = ARPHRD_NONE;
+	dev->hard_header_len = 0;
+	dev->addr_len        = 0;
+	dev->flags           = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST;
+	dev->netdev_ops      = &qmimux_netdev_ops;
+	dev->destructor      = free_netdev;
+}
+
+static struct net_device *qmimux_find_dev(struct usbnet *dev, u8 mux_id)
+{
+	struct qmimux_priv *priv;
+	struct list_head *iter;
+	struct net_device *ldev;
+
+	rcu_read_lock();
+	netdev_for_each_upper_dev_rcu(dev->net, ldev, iter) {
+		priv = netdev_priv(ldev);
+		if (priv->mux_id == mux_id) {
+			rcu_read_unlock();
+			return ldev;
+		}
+	}
+	rcu_read_unlock();
+	return NULL;
+}
+
+static bool qmimux_has_slaves(struct usbnet *dev)
+{
+	return !list_empty(&dev->net->adj_list.upper);
+}
+
+static int qmimux_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
+{
+	unsigned int len, offset = sizeof(struct qmimux_hdr);
+	struct qmimux_hdr *hdr;
+	struct net_device *net;
+	struct sk_buff *skbn;
+
+	while (offset < skb->len) {
+		hdr = (struct qmimux_hdr *)skb->data;
+		len = be16_to_cpu(hdr->pkt_len);
+
+		/* drop the packet, bogus length */
+		if (offset + len > skb->len)
+			return 0;
+
+		/* control packet, we do not know what to do */
+		if (hdr->pad & 0x80)
+			goto skip;
+
+		net = qmimux_find_dev(dev, hdr->mux_id);
+		if (!net)
+			goto skip;
+		skbn = netdev_alloc_skb(net, len);
+		if (!skbn)
+			return 0;
+		skbn->dev = net;
+
+		switch (skb->data[offset] & 0xf0) {
+		case 0x40:
+			skbn->protocol = htons(ETH_P_IP);
+			break;
+		case 0x60:
+			skbn->protocol = htons(ETH_P_IPV6);
+			break;
+		default:
+			/* not ip - do not know what to do */
+			goto skip;
+		}
+
+		memcpy(skb_put(skbn, len), skb->data + offset, len);
+		if (netif_rx(skbn) != NET_RX_SUCCESS)
+			return 0;
+
+skip:
+		offset += len + sizeof(struct qmimux_hdr);
+	}
+	return 1;
+}
+
+static int qmimux_register_device(struct net_device *real_dev, u8 mux_id)
+{
+	struct net_device *new_dev;
+	struct qmimux_priv *priv;
+	int err;
+
+	new_dev = alloc_netdev(sizeof(struct qmimux_priv),
+			       "qmimux%d", NET_NAME_UNKNOWN, qmimux_setup);
+	if (!new_dev)
+		return -ENOBUFS;
+
+	dev_net_set(new_dev, dev_net(real_dev));
+	priv = netdev_priv(new_dev);
+	priv->mux_id = mux_id;
+	priv->real_dev = real_dev;
+
+	err = register_netdevice(new_dev);
+	if (err < 0)
+		goto out_free_newdev;
+
+	/* Account for reference in struct qmimux_priv_priv */
+	dev_hold(real_dev);
+
+	err = netdev_upper_dev_link(real_dev, new_dev);
+	if (err)
+		goto out_unregister_netdev;
+
+	netif_stacked_transfer_operstate(real_dev, new_dev);
+
+	return 0;
+
+out_unregister_netdev:
+	unregister_netdevice(new_dev);
+	dev_put(real_dev);
+
+out_free_newdev:
+	free_netdev(new_dev);
+	return err;
+}
+
+static void qmimux_unregister_device(struct net_device *dev)
+{
+	struct qmimux_priv *priv = netdev_priv(dev);
+	struct net_device *real_dev = priv->real_dev;
+
+	netdev_upper_dev_unlink(real_dev, dev);
+	unregister_netdevice(dev);
+
+	/* Get rid of the reference to real_dev */
+	dev_put(real_dev);
+}
+
 static void qmi_wwan_netdev_setup(struct net_device *net)
 {
 	struct usbnet *dev = netdev_priv(net);
@@ -137,10 +323,114 @@ static ssize_t raw_ip_store(struct device *d,  struct device_attribute *attr, co
 	return ret;
 }
 
+static ssize_t add_mux_show(struct device *d, struct device_attribute *attr, char *buf)
+{
+	struct net_device *dev = to_net_dev(d);
+	struct qmimux_priv *priv;
+	struct list_head *iter;
+	struct net_device *ldev;
+	ssize_t count = 0;
+
+	rcu_read_lock();
+	netdev_for_each_upper_dev_rcu(dev, ldev, iter) {
+		priv = netdev_priv(ldev);
+		count += scnprintf(&buf[count], PAGE_SIZE - count,
+				   "0x%02x\n", priv->mux_id);
+	}
+	rcu_read_unlock();
+	return count;
+}
+
+static ssize_t add_mux_store(struct device *d,  struct device_attribute *attr, const char *buf, size_t len)
+{
+	struct usbnet *dev = netdev_priv(to_net_dev(d));
+	struct qmi_wwan_state *info = (void *)&dev->data;
+	u8 mux_id;
+	int ret;
+
+	if (kstrtou8(buf, 0, &mux_id))
+		return -EINVAL;
+
+	/* mux_id [1 - 0x7f] range empirically found */
+	if (mux_id < 1 || mux_id > 0x7f)
+		return -EINVAL;
+
+	if (!rtnl_trylock())
+		return restart_syscall();
+
+	if (qmimux_find_dev(dev, mux_id)) {
+		netdev_err(dev->net, "mux_id already present\n");
+		ret = -EINVAL;
+		goto err;
+	}
+
+	/* we don't want to modify a running netdev */
+	if (netif_running(dev->net)) {
+		netdev_err(dev->net, "Cannot change a running device\n");
+		ret = -EBUSY;
+		goto err;
+	}
+
+	ret = qmimux_register_device(dev->net, mux_id);
+	if (!ret) {
+		info->flags |= QMI_WWAN_FLAG_MUX;
+		ret = len;
+	}
+err:
+	rtnl_unlock();
+	return ret;
+}
+
+static ssize_t del_mux_show(struct device *d, struct device_attribute *attr, char *buf)
+{
+	return add_mux_show(d, attr, buf);
+}
+
+static ssize_t del_mux_store(struct device *d,  struct device_attribute *attr, const char *buf, size_t len)
+{
+	struct usbnet *dev = netdev_priv(to_net_dev(d));
+	struct qmi_wwan_state *info = (void *)&dev->data;
+	struct net_device *del_dev;
+	u8 mux_id;
+	int ret = 0;
+
+	if (kstrtou8(buf, 0, &mux_id))
+		return -EINVAL;
+
+	if (!rtnl_trylock())
+		return restart_syscall();
+
+	/* we don't want to modify a running netdev */
+	if (netif_running(dev->net)) {
+		netdev_err(dev->net, "Cannot change a running device\n");
+		ret = -EBUSY;
+		goto err;
+	}
+
+	del_dev = qmimux_find_dev(dev, mux_id);
+	if (!del_dev) {
+		netdev_err(dev->net, "mux_id not present\n");
+		ret = -EINVAL;
+		goto err;
+	}
+	qmimux_unregister_device(del_dev);
+
+	if (!qmimux_has_slaves(dev))
+		info->flags &= ~QMI_WWAN_FLAG_MUX;
+	ret = len;
+err:
+	rtnl_unlock();
+	return ret;
+}
+
 static DEVICE_ATTR_RW(raw_ip);
+static DEVICE_ATTR_RW(add_mux);
+static DEVICE_ATTR_RW(del_mux);
 
 static struct attribute *qmi_wwan_sysfs_attrs[] = {
 	&dev_attr_raw_ip.attr,
+	&dev_attr_add_mux.attr,
+	&dev_attr_del_mux.attr,
 	NULL,
 };
 
@@ -184,6 +474,9 @@ static int qmi_wwan_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
 	if (skb->len < dev->net->hard_header_len)
 		return 0;
 
+	if (info->flags & QMI_WWAN_FLAG_MUX)
+		return qmimux_rx_fixup(dev, skb);
+
 	switch (skb->data[0] & 0xf0) {
 	case 0x40:
 		proto = htons(ETH_P_IP);
@@ -1030,11 +1323,33 @@ static int qmi_wwan_probe(struct usb_interface *intf,
 	return usbnet_probe(intf, id);
 }
 
+static void qmi_wwan_disconnect(struct usb_interface *intf)
+{
+	struct usbnet *dev = usb_get_intfdata(intf);
+	struct qmi_wwan_state *info = (void *)&dev->data;
+	struct list_head *iter;
+	struct net_device *ldev;
+
+	if (info->flags & QMI_WWAN_FLAG_MUX) {
+		if (!rtnl_trylock()) {
+			restart_syscall();
+			return;
+		}
+		rcu_read_lock();
+		netdev_for_each_upper_dev_rcu(dev->net, ldev, iter)
+			qmimux_unregister_device(ldev);
+		rcu_read_unlock();
+		rtnl_unlock();
+		info->flags &= ~QMI_WWAN_FLAG_MUX;
+	}
+	usbnet_disconnect(intf);
+}
+
 static struct usb_driver qmi_wwan_driver = {
 	.name		      = "qmi_wwan",
 	.id_table	      = products,
 	.probe		      = qmi_wwan_probe,
-	.disconnect	      = usbnet_disconnect,
+	.disconnect	      = qmi_wwan_disconnect,
 	.suspend	      = qmi_wwan_suspend,
 	.resume		      =	qmi_wwan_resume,
 	.reset_resume         = qmi_wwan_resume,
-- 
2.8.1

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[PATCH 2/2] Documentation: ABI: testing: sysfs-class-net-qmi: add new qmap mux files description

[Daniele Palmas]

This patch updates the documentation related to the new files added for
qmap mux support.

Signed-off-by: Daniele Palmas <dnlplm@gmail.com>
---
 Documentation/ABI/testing/sysfs-class-net-qmi | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)

diff --git a/Documentation/ABI/testing/sysfs-class-net-qmi b/Documentation/ABI/testing/sysfs-class-net-qmi
index fa5a00b..5191dc3 100644
--- a/Documentation/ABI/testing/sysfs-class-net-qmi
+++ b/Documentation/ABI/testing/sysfs-class-net-qmi
@@ -21,3 +21,30 @@ Description:
 		is responsible for coordination of driver and firmware
 		link framing mode, changing this setting to 'Y' if the
 		firmware is configured for 'raw-ip' mode.
+
+What:		/sys/class/net/<iface>/qmi/add_mux
+Date:		March 2017
+KernelVersion:	4.11
+Contact:	Bjørn Mork <bjorn@mork.no>
+Description:
+		Unsigned integer.
+
+		Write a number ranging from 1 to 127 to add a qmap mux
+		based network device, supported by recent Qualcomm based
+		modems.
+
+		The network device will be called qmimux.
+
+		Userspace is in charge of managing the qmux network device
+		activation and data stream setup  on them modem side by
+		using the proper QMI protocol requests.
+
+What:		/sys/class/net/<iface>/qmi/del_mux
+Date:		March 2017
+KernelVersion:	4.11
+Contact:	Bjørn Mork <bjorn@mork.no>
+Description:
+		Unsigned integer.
+
+		Write a number ranging from 1 to 127 to delete a previously
+		created qmap mux based network device.
-- 
2.8.1

Re: [PATCH 2/2] Documentation: ABI: testing: sysfs-class-net-qmi: add new qmap mux files description

[Sergei Shtylyov]

Hello!

On 03/24/2017 04:22 PM, Daniele Palmas wrote:

> This patch updates the documentation related to the new files added for
> qmap mux support.
>
> Signed-off-by: Daniele Palmas <dnlplm@gmail.com>
> ---
>  Documentation/ABI/testing/sysfs-class-net-qmi | 27 +++++++++++++++++++++++++++
>  1 file changed, 27 insertions(+)
>
> diff --git a/Documentation/ABI/testing/sysfs-class-net-qmi b/Documentation/ABI/testing/sysfs-class-net-qmi
> index fa5a00b..5191dc3 100644
> --- a/Documentation/ABI/testing/sysfs-class-net-qmi
> +++ b/Documentation/ABI/testing/sysfs-class-net-qmi
> @@ -21,3 +21,30 @@ Description:
>  		is responsible for coordination of driver and firmware
>  		link framing mode, changing this setting to 'Y' if the
>  		firmware is configured for 'raw-ip' mode.
> +
> +What:		/sys/class/net/<iface>/qmi/add_mux
> +Date:		March 2017
> +KernelVersion:	4.11
> +Contact:	Bjørn Mork <bjorn@mork.no>
> +Description:
> +		Unsigned integer.
> +
> +		Write a number ranging from 1 to 127 to add a qmap mux
> +		based network device, supported by recent Qualcomm based
> +		modems.
> +
> +		The network device will be called qmimux.
> +
> +		Userspace is in charge of managing the qmux network device
> +		activation and data stream setup  on them modem side by

    s/them/the/?

> +		using the proper QMI protocol requests.
[...]

MBR, Sergei

Re: [PATCH 2/2] Documentation: ABI: testing: sysfs-class-net-qmi: add new qmap mux files description

[Daniele Palmas]

Hi Sergei,

2017-03-24 17:31 GMT+01:00 Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>:
> Hello!
>
>
> On 03/24/2017 04:22 PM, Daniele Palmas wrote:
>
>> This patch updates the documentation related to the new files added for
>> qmap mux support.
>>
>> Signed-off-by: Daniele Palmas <dnlplm@gmail.com>
>> ---
>>  Documentation/ABI/testing/sysfs-class-net-qmi | 27
>> +++++++++++++++++++++++++++
>>  1 file changed, 27 insertions(+)
>>
>> diff --git a/Documentation/ABI/testing/sysfs-class-net-qmi
>> b/Documentation/ABI/testing/sysfs-class-net-qmi
>> index fa5a00b..5191dc3 100644
>> --- a/Documentation/ABI/testing/sysfs-class-net-qmi
>> +++ b/Documentation/ABI/testing/sysfs-class-net-qmi
>> @@ -21,3 +21,30 @@ Description:
>>                 is responsible for coordination of driver and firmware
>>                 link framing mode, changing this setting to 'Y' if the
>>                 firmware is configured for 'raw-ip' mode.
>> +
>> +What:          /sys/class/net/<iface>/qmi/add_mux
>> +Date:          March 2017
>> +KernelVersion: 4.11
>> +Contact:       Bjørn Mork <bjorn@mork.no>
>> +Description:
>> +               Unsigned integer.
>> +
>> +               Write a number ranging from 1 to 127 to add a qmap mux
>> +               based network device, supported by recent Qualcomm based
>> +               modems.
>> +
>> +               The network device will be called qmimux.
>> +
>> +               Userspace is in charge of managing the qmux network device
>> +               activation and data stream setup  on them modem side by
>
>
>    s/them/the/?
>

I will fix this if there will be a v2 series.

Thanks,
Daniele

>> +               using the proper QMI protocol requests.
>
> [...]
>
> MBR, Sergei
>

Re: [PATCH 0/2] net: usb: qmi_wwan: add qmap mux protocol support

[Subash Abhinov Kasiviswanathan]

On 2017-03-24 07:22, Daniele Palmas wrote:
> This patch adds support for qmap mux protocol available in recent
> Qualcomm based modems.
> 
> The qmap mux protocol can be used for multiplexing data packets in
> order to have multiple ip streams through the same physical device.
> 
> Two new sysfs files are added for adding/removing the qmap mux based
> interfaces (named qmimux):
> 
> /sys/class/net/<iface>/qmi/add_mux
> /sys/class/net/<iface>/qmi/del_mux
> 
> Main patch author is Bjørn Mork <bjorn@mork.no>
> 
> An userspace implementation of the qmi requests needed to support
> multiple ip streams is already available (namely libqmi since
> version 1.18.0).
> 
> The qmap mux feature has been recently implemented in Codeaurora
> gobinet out-of-kernel driver that was the inspiration for this
> development.
> 
> Tests have been performed with Telit LE922A6 (PID 0x1040)
> 
> Daniele Palmas (2):
>   net: usb: qmi_wwan: add qmap mux protocol support
>   Documentation: ABI: testing: sysfs-class-net-qmi: add new qmap mux
>     files description
> 
>  Documentation/ABI/testing/sysfs-class-net-qmi |  27 +++
>  drivers/net/usb/qmi_wwan.c                    | 317 
> +++++++++++++++++++++++++-
>  2 files changed, 343 insertions(+), 1 deletion(-)

Hi Daniele

We are working on something similar
https://www.mail-archive.com/netdev@vger.kernel.org/msg157677.html

We are planning to upstream this as a platform agnostic driver without
tying it to a particular physical transport here.

We also add support for aggregation and flow control (control packet 
0x80)
apart from the multiplexing.

Re: [PATCH 0/2] net: usb: qmi_wwan: add qmap mux protocol support

[Daniele Palmas]

Hi Subash,

2017-03-24 18:45 GMT+01:00 Subash Abhinov Kasiviswanathan
<subashab@codeaurora.org>:
> On 2017-03-24 07:22, Daniele Palmas wrote:
>>
>> This patch adds support for qmap mux protocol available in recent
>> Qualcomm based modems.
>>
>> The qmap mux protocol can be used for multiplexing data packets in
>> order to have multiple ip streams through the same physical device.
>>
>> Two new sysfs files are added for adding/removing the qmap mux based
>> interfaces (named qmimux):
>>
>> /sys/class/net/<iface>/qmi/add_mux
>> /sys/class/net/<iface>/qmi/del_mux
>>
>> Main patch author is Bjørn Mork <bjorn@mork.no>
>>
>> An userspace implementation of the qmi requests needed to support
>> multiple ip streams is already available (namely libqmi since
>> version 1.18.0).
>>
>> The qmap mux feature has been recently implemented in Codeaurora
>> gobinet out-of-kernel driver that was the inspiration for this
>> development.
>>
>> Tests have been performed with Telit LE922A6 (PID 0x1040)
>>
>> Daniele Palmas (2):
>>   net: usb: qmi_wwan: add qmap mux protocol support
>>   Documentation: ABI: testing: sysfs-class-net-qmi: add new qmap mux
>>     files description
>>
>>  Documentation/ABI/testing/sysfs-class-net-qmi |  27 +++
>>  drivers/net/usb/qmi_wwan.c                    | 317
>> +++++++++++++++++++++++++-
>>  2 files changed, 343 insertions(+), 1 deletion(-)
>
>
> Hi Daniele
>
> We are working on something similar
> https://www.mail-archive.com/netdev@vger.kernel.org/msg157677.html
>
> We are planning to upstream this as a platform agnostic driver without
> tying it to a particular physical transport here.
>
> We also add support for aggregation and flow control (control packet 0x80)
> apart from the multiplexing.
>

Thanks, I'll take a look at your patch series.

Regards,
Daniele

> --
> The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
> a Linux Foundation Collaborative Project

Re: [PATCH 0/2] net: usb: qmi_wwan: add qmap mux protocol support

[David Miller]

From: Daniele Palmas <dnlplm@gmail.com>
Date: Fri, 24 Mar 2017 14:22:44 +0100

> This patch adds support for qmap mux protocol available in recent
> Qualcomm based modems.
> 
> The qmap mux protocol can be used for multiplexing data packets in
> order to have multiple ip streams through the same physical device.
> 
> Two new sysfs files are added for adding/removing the qmap mux based
> interfaces (named qmimux):
> 
> /sys/class/net/<iface>/qmi/add_mux
> /sys/class/net/<iface>/qmi/del_mux
> 
> Main patch author is Bjørn Mork <bjorn@mork.no>
> 
> An userspace implementation of the qmi requests needed to support
> multiple ip streams is already available (namely libqmi since
> version 1.18.0).
> 
> The qmap mux feature has been recently implemented in Codeaurora
> gobinet out-of-kernel driver that was the inspiration for this
> development.
> 
> Tests have been performed with Telit LE922A6 (PID 0x1040)

Series applied, thanks.