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path: root/drivers/net/usb/rndis_host.c
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Diffstat (limited to 'drivers/net/usb/rndis_host.c')
-rw-r--r--drivers/net/usb/rndis_host.c273
1 files changed, 158 insertions, 115 deletions
diff --git a/drivers/net/usb/rndis_host.c b/drivers/net/usb/rndis_host.c
index 369c731114b..524a47a2812 100644
--- a/drivers/net/usb/rndis_host.c
+++ b/drivers/net/usb/rndis_host.c
@@ -13,15 +13,14 @@
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include <linux/module.h>
-#include <linux/init.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/ethtool.h>
#include <linux/workqueue.h>
+#include <linux/slab.h>
#include <linux/mii.h>
#include <linux/usb.h>
#include <linux/usb/cdc.h>
@@ -57,14 +56,41 @@
*/
void rndis_status(struct usbnet *dev, struct urb *urb)
{
- devdbg(dev, "rndis status urb, len %d stat %d",
- urb->actual_length, urb->status);
+ netdev_dbg(dev->net, "rndis status urb, len %d stat %d\n",
+ urb->actual_length, urb->status);
// FIXME for keepalives, respond immediately (asynchronously)
// if not an RNDIS status, do like cdc_status(dev,urb) does
}
EXPORT_SYMBOL_GPL(rndis_status);
/*
+ * RNDIS indicate messages.
+ */
+static void rndis_msg_indicate(struct usbnet *dev, struct rndis_indicate *msg,
+ int buflen)
+{
+ struct cdc_state *info = (void *)&dev->data;
+ struct device *udev = &info->control->dev;
+
+ if (dev->driver_info->indication) {
+ dev->driver_info->indication(dev, msg, buflen);
+ } else {
+ u32 status = le32_to_cpu(msg->status);
+
+ switch (status) {
+ case RNDIS_STATUS_MEDIA_CONNECT:
+ dev_info(udev, "rndis media connect\n");
+ break;
+ case RNDIS_STATUS_MEDIA_DISCONNECT:
+ dev_info(udev, "rndis media disconnect\n");
+ break;
+ default:
+ dev_info(udev, "rndis indication: 0x%08x\n", status);
+ }
+ }
+}
+
+/*
* RPC done RNDIS-style. Caller guarantees:
* - message is properly byteswapped
* - there's no other request pending
@@ -74,22 +100,25 @@ EXPORT_SYMBOL_GPL(rndis_status);
* Call context is likely probe(), before interface name is known,
* which is why we won't try to use it in the diagnostics.
*/
-int rndis_command(struct usbnet *dev, struct rndis_msg_hdr *buf)
+int rndis_command(struct usbnet *dev, struct rndis_msg_hdr *buf, int buflen)
{
struct cdc_state *info = (void *) &dev->data;
+ struct usb_cdc_notification notification;
int master_ifnum;
int retval;
+ int partial;
unsigned count;
- __le32 rsp;
- u32 xid = 0, msg_len, request_id;
+ u32 xid = 0, msg_len, request_id, msg_type, rsp,
+ status;
/* REVISIT when this gets called from contexts other than probe() or
* disconnect(): either serialize, or dispatch responses on xid
*/
+ msg_type = le32_to_cpu(buf->msg_type);
+
/* Issue the request; xid is unique, don't bother byteswapping it */
- if (likely(buf->msg_type != RNDIS_MSG_HALT
- && buf->msg_type != RNDIS_MSG_RESET)) {
+ if (likely(msg_type != RNDIS_MSG_HALT && msg_type != RNDIS_MSG_RESET)) {
xid = dev->xid++;
if (!xid)
xid = dev->xid++;
@@ -106,14 +135,21 @@ int rndis_command(struct usbnet *dev, struct rndis_msg_hdr *buf)
if (unlikely(retval < 0 || xid == 0))
return retval;
- // FIXME Seems like some devices discard responses when
- // we time out and cancel our "get response" requests...
- // so, this is fragile. Probably need to poll for status.
+ /* Some devices don't respond on the control channel until
+ * polled on the status channel, so do that first. */
+ if (dev->driver_info->data & RNDIS_DRIVER_DATA_POLL_STATUS) {
+ retval = usb_interrupt_msg(
+ dev->udev,
+ usb_rcvintpipe(dev->udev,
+ dev->status->desc.bEndpointAddress),
+ &notification, sizeof(notification), &partial,
+ RNDIS_CONTROL_TIMEOUT_MS);
+ if (unlikely(retval < 0))
+ return retval;
+ }
- /* ignore status endpoint, just poll the control channel;
- * the request probably completed immediately
- */
- rsp = buf->msg_type | RNDIS_MSG_COMPLETION;
+ /* Poll the control channel; the request probably completed immediately */
+ rsp = le32_to_cpu(buf->msg_type) | RNDIS_MSG_COMPLETION;
for (count = 0; count < 10; count++) {
memset(buf, 0, CONTROL_BUFFER_SIZE);
retval = usb_control_msg(dev->udev,
@@ -121,56 +157,39 @@ int rndis_command(struct usbnet *dev, struct rndis_msg_hdr *buf)
USB_CDC_GET_ENCAPSULATED_RESPONSE,
USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
0, master_ifnum,
- buf, CONTROL_BUFFER_SIZE,
+ buf, buflen,
RNDIS_CONTROL_TIMEOUT_MS);
if (likely(retval >= 8)) {
+ msg_type = le32_to_cpu(buf->msg_type);
msg_len = le32_to_cpu(buf->msg_len);
+ status = le32_to_cpu(buf->status);
request_id = (__force u32) buf->request_id;
- if (likely(buf->msg_type == rsp)) {
+ if (likely(msg_type == rsp)) {
if (likely(request_id == xid)) {
if (unlikely(rsp == RNDIS_MSG_RESET_C))
return 0;
- if (likely(RNDIS_STATUS_SUCCESS
- == buf->status))
+ if (likely(RNDIS_STATUS_SUCCESS ==
+ status))
return 0;
dev_dbg(&info->control->dev,
"rndis reply status %08x\n",
- le32_to_cpu(buf->status));
+ status);
return -EL3RST;
}
dev_dbg(&info->control->dev,
"rndis reply id %d expected %d\n",
request_id, xid);
/* then likely retry */
- } else switch (buf->msg_type) {
- case RNDIS_MSG_INDICATE: { /* fault/event */
- struct rndis_indicate *msg = (void *)buf;
- int state = 0;
-
- switch (msg->status) {
- case RNDIS_STATUS_MEDIA_CONNECT:
- state = 1;
- case RNDIS_STATUS_MEDIA_DISCONNECT:
- dev_info(&info->control->dev,
- "rndis media %sconnect\n",
- !state?"dis":"");
- if (dev->driver_info->link_change)
- dev->driver_info->link_change(
- dev, state);
- break;
- default:
- dev_info(&info->control->dev,
- "rndis indication: 0x%08x\n",
- le32_to_cpu(msg->status));
- }
- }
+ } else switch (msg_type) {
+ case RNDIS_MSG_INDICATE: /* fault/event */
+ rndis_msg_indicate(dev, (void *)buf, buflen);
break;
- case RNDIS_MSG_KEEPALIVE: { /* ping */
+ case RNDIS_MSG_KEEPALIVE: { /* ping */
struct rndis_keepalive_c *msg = (void *)buf;
- msg->msg_type = RNDIS_MSG_KEEPALIVE_C;
- msg->msg_len = ccpu2(sizeof *msg);
- msg->status = RNDIS_STATUS_SUCCESS;
+ msg->msg_type = cpu_to_le32(RNDIS_MSG_KEEPALIVE_C);
+ msg->msg_len = cpu_to_le32(sizeof *msg);
+ msg->status = cpu_to_le32(RNDIS_STATUS_SUCCESS);
retval = usb_control_msg(dev->udev,
usb_sndctrlpipe(dev->udev, 0),
USB_CDC_SEND_ENCAPSULATED_COMMAND,
@@ -194,7 +213,7 @@ int rndis_command(struct usbnet *dev, struct rndis_msg_hdr *buf)
dev_dbg(&info->control->dev,
"rndis response error, code %d\n", retval);
}
- msleep(2);
+ msleep(20);
}
dev_dbg(&info->control->dev, "rndis response timeout\n");
return -ETIMEDOUT;
@@ -233,13 +252,13 @@ static int rndis_query(struct usbnet *dev, struct usb_interface *intf,
u.buf = buf;
memset(u.get, 0, sizeof *u.get + in_len);
- u.get->msg_type = RNDIS_MSG_QUERY;
+ u.get->msg_type = cpu_to_le32(RNDIS_MSG_QUERY);
u.get->msg_len = cpu_to_le32(sizeof *u.get + in_len);
- u.get->oid = oid;
+ u.get->oid = cpu_to_le32(oid);
u.get->len = cpu_to_le32(in_len);
- u.get->offset = ccpu2(20);
+ u.get->offset = cpu_to_le32(20);
- retval = rndis_command(dev, u.header);
+ retval = rndis_command(dev, u.header, CONTROL_BUFFER_SIZE);
if (unlikely(retval < 0)) {
dev_err(&intf->dev, "RNDIS_MSG_QUERY(0x%08x) failed, %d\n",
oid, retval);
@@ -266,6 +285,16 @@ response_error:
return -EDOM;
}
+/* same as usbnet_netdev_ops but MTU change not allowed */
+static const struct net_device_ops rndis_netdev_ops = {
+ .ndo_open = usbnet_open,
+ .ndo_stop = usbnet_stop,
+ .ndo_start_xmit = usbnet_start_xmit,
+ .ndo_tx_timeout = usbnet_tx_timeout,
+ .ndo_set_mac_address = eth_mac_addr,
+ .ndo_validate_addr = eth_validate_addr,
+};
+
int
generic_rndis_bind(struct usbnet *dev, struct usb_interface *intf, int flags)
{
@@ -283,7 +312,8 @@ generic_rndis_bind(struct usbnet *dev, struct usb_interface *intf, int flags)
struct rndis_set_c *set_c;
struct rndis_halt *halt;
} u;
- u32 tmp, phym_unspec, *phym;
+ u32 tmp;
+ __le32 phym_unspec, *phym;
int reply_len;
unsigned char *bp;
@@ -295,10 +325,10 @@ generic_rndis_bind(struct usbnet *dev, struct usb_interface *intf, int flags)
if (retval < 0)
goto fail;
- u.init->msg_type = RNDIS_MSG_INIT;
- u.init->msg_len = ccpu2(sizeof *u.init);
- u.init->major_version = ccpu2(1);
- u.init->minor_version = ccpu2(0);
+ u.init->msg_type = cpu_to_le32(RNDIS_MSG_INIT);
+ u.init->msg_len = cpu_to_le32(sizeof *u.init);
+ u.init->major_version = cpu_to_le32(1);
+ u.init->minor_version = cpu_to_le32(0);
/* max transfer (in spec) is 0x4000 at full speed, but for
* TX we'll stick to one Ethernet packet plus RNDIS framing.
@@ -316,8 +346,8 @@ generic_rndis_bind(struct usbnet *dev, struct usb_interface *intf, int flags)
dev->maxpacket = usb_maxpacket(dev->udev, dev->out, 1);
if (dev->maxpacket == 0) {
- if (netif_msg_probe(dev))
- dev_dbg(&intf->dev, "dev->maxpacket can't be 0\n");
+ netif_dbg(dev, probe, dev->net,
+ "dev->maxpacket can't be 0\n");
retval = -EINVAL;
goto fail_and_release;
}
@@ -326,8 +356,9 @@ generic_rndis_bind(struct usbnet *dev, struct usb_interface *intf, int flags)
dev->rx_urb_size &= ~(dev->maxpacket - 1);
u.init->max_transfer_size = cpu_to_le32(dev->rx_urb_size);
- net->change_mtu = NULL;
- retval = rndis_command(dev, u.header);
+ net->netdev_ops = &rndis_netdev_ops;
+
+ retval = rndis_command(dev, u.header, CONTROL_BUFFER_SIZE);
if (unlikely(retval < 0)) {
/* it might not even be an RNDIS device!! */
dev_err(&intf->dev, "RNDIS init failed, %d\n", retval);
@@ -342,12 +373,12 @@ generic_rndis_bind(struct usbnet *dev, struct usb_interface *intf, int flags)
retval = -EINVAL;
goto halt_fail_and_release;
}
- dev->hard_mtu = tmp;
- net->mtu = dev->hard_mtu - net->hard_header_len;
dev_warn(&intf->dev,
"dev can't take %u byte packets (max %u), "
"adjusting MTU to %u\n",
- dev->hard_mtu, tmp, net->mtu);
+ dev->hard_mtu, tmp, tmp - net->hard_header_len);
+ dev->hard_mtu = tmp;
+ net->mtu = dev->hard_mtu - net->hard_header_len;
}
/* REVISIT: peripheral "alignment" request is ignored ... */
@@ -365,34 +396,34 @@ generic_rndis_bind(struct usbnet *dev, struct usb_interface *intf, int flags)
/* Check physical medium */
phym = NULL;
reply_len = sizeof *phym;
- retval = rndis_query(dev, intf, u.buf, OID_GEN_PHYSICAL_MEDIUM,
- 0, (void **) &phym, &reply_len);
+ retval = rndis_query(dev, intf, u.buf,
+ RNDIS_OID_GEN_PHYSICAL_MEDIUM,
+ 0, (void **) &phym, &reply_len);
if (retval != 0 || !phym) {
/* OID is optional so don't fail here. */
- phym_unspec = RNDIS_PHYSICAL_MEDIUM_UNSPECIFIED;
+ phym_unspec = cpu_to_le32(RNDIS_PHYSICAL_MEDIUM_UNSPECIFIED);
phym = &phym_unspec;
}
if ((flags & FLAG_RNDIS_PHYM_WIRELESS) &&
- *phym != RNDIS_PHYSICAL_MEDIUM_WIRELESS_LAN) {
- if (netif_msg_probe(dev))
- dev_dbg(&intf->dev, "driver requires wireless "
- "physical medium, but device is not.\n");
+ le32_to_cpup(phym) != RNDIS_PHYSICAL_MEDIUM_WIRELESS_LAN) {
+ netif_dbg(dev, probe, dev->net,
+ "driver requires wireless physical medium, but device is not\n");
retval = -ENODEV;
goto halt_fail_and_release;
}
if ((flags & FLAG_RNDIS_PHYM_NOT_WIRELESS) &&
- *phym == RNDIS_PHYSICAL_MEDIUM_WIRELESS_LAN) {
- if (netif_msg_probe(dev))
- dev_dbg(&intf->dev, "driver requires non-wireless "
- "physical medium, but device is wireless.\n");
+ le32_to_cpup(phym) == RNDIS_PHYSICAL_MEDIUM_WIRELESS_LAN) {
+ netif_dbg(dev, probe, dev->net,
+ "driver requires non-wireless physical medium, but device is wireless.\n");
retval = -ENODEV;
goto halt_fail_and_release;
}
/* Get designated host ethernet address */
reply_len = ETH_ALEN;
- retval = rndis_query(dev, intf, u.buf, OID_802_3_PERMANENT_ADDRESS,
- 48, (void **) &bp, &reply_len);
+ retval = rndis_query(dev, intf, u.buf,
+ RNDIS_OID_802_3_PERMANENT_ADDRESS,
+ 48, (void **) &bp, &reply_len);
if (unlikely(retval< 0)) {
dev_err(&intf->dev, "rndis get ethaddr, %d\n", retval);
goto halt_fail_and_release;
@@ -401,14 +432,14 @@ generic_rndis_bind(struct usbnet *dev, struct usb_interface *intf, int flags)
/* set a nonzero filter to enable data transfers */
memset(u.set, 0, sizeof *u.set);
- u.set->msg_type = RNDIS_MSG_SET;
- u.set->msg_len = ccpu2(4 + sizeof *u.set);
- u.set->oid = OID_GEN_CURRENT_PACKET_FILTER;
- u.set->len = ccpu2(4);
- u.set->offset = ccpu2((sizeof *u.set) - 8);
- *(__le32 *)(u.buf + sizeof *u.set) = RNDIS_DEFAULT_FILTER;
-
- retval = rndis_command(dev, u.header);
+ u.set->msg_type = cpu_to_le32(RNDIS_MSG_SET);
+ u.set->msg_len = cpu_to_le32(4 + sizeof *u.set);
+ u.set->oid = cpu_to_le32(RNDIS_OID_GEN_CURRENT_PACKET_FILTER);
+ u.set->len = cpu_to_le32(4);
+ u.set->offset = cpu_to_le32((sizeof *u.set) - 8);
+ *(__le32 *)(u.buf + sizeof *u.set) = cpu_to_le32(RNDIS_DEFAULT_FILTER);
+
+ retval = rndis_command(dev, u.header, CONTROL_BUFFER_SIZE);
if (unlikely(retval < 0)) {
dev_err(&intf->dev, "rndis set packet filter, %d\n", retval);
goto halt_fail_and_release;
@@ -421,9 +452,9 @@ generic_rndis_bind(struct usbnet *dev, struct usb_interface *intf, int flags)
halt_fail_and_release:
memset(u.halt, 0, sizeof *u.halt);
- u.halt->msg_type = RNDIS_MSG_HALT;
- u.halt->msg_len = ccpu2(sizeof *u.halt);
- (void) rndis_command(dev, (void *)u.halt);
+ u.halt->msg_type = cpu_to_le32(RNDIS_MSG_HALT);
+ u.halt->msg_len = cpu_to_le32(sizeof *u.halt);
+ (void) rndis_command(dev, (void *)u.halt, CONTROL_BUFFER_SIZE);
fail_and_release:
usb_set_intfdata(info->data, NULL);
usb_driver_release_interface(driver_of(intf), info->data);
@@ -446,9 +477,9 @@ void rndis_unbind(struct usbnet *dev, struct usb_interface *intf)
/* try to clear any rndis state/activity (no i/o from stack!) */
halt = kzalloc(CONTROL_BUFFER_SIZE, GFP_KERNEL);
if (halt) {
- halt->msg_type = RNDIS_MSG_HALT;
- halt->msg_len = ccpu2(sizeof *halt);
- (void) rndis_command(dev, (void *)halt);
+ halt->msg_type = cpu_to_le32(RNDIS_MSG_HALT);
+ halt->msg_len = cpu_to_le32(sizeof *halt);
+ (void) rndis_command(dev, (void *)halt, CONTROL_BUFFER_SIZE);
kfree(halt);
}
@@ -461,24 +492,28 @@ EXPORT_SYMBOL_GPL(rndis_unbind);
*/
int rndis_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
{
+ /* This check is no longer done by usbnet */
+ if (skb->len < dev->net->hard_header_len)
+ return 0;
+
/* peripheral may have batched packets to us... */
while (likely(skb->len)) {
struct rndis_data_hdr *hdr = (void *)skb->data;
struct sk_buff *skb2;
- u32 msg_len, data_offset, data_len;
+ u32 msg_type, msg_len, data_offset, data_len;
+ msg_type = le32_to_cpu(hdr->msg_type);
msg_len = le32_to_cpu(hdr->msg_len);
data_offset = le32_to_cpu(hdr->data_offset);
data_len = le32_to_cpu(hdr->data_len);
/* don't choke if we see oob, per-packet data, etc */
- if (unlikely(hdr->msg_type != RNDIS_MSG_PACKET
- || skb->len < msg_len
+ if (unlikely(msg_type != RNDIS_MSG_PACKET || skb->len < msg_len
|| (data_offset + data_len + 8) > msg_len)) {
- dev->stats.rx_frame_errors++;
- devdbg(dev, "bad rndis message %d/%d/%d/%d, len %d",
- le32_to_cpu(hdr->msg_type),
- msg_len, data_offset, data_len, skb->len);
+ dev->net->stats.rx_frame_errors++;
+ netdev_dbg(dev->net, "bad rndis message %d/%d/%d/%d, len %d\n",
+ le32_to_cpu(hdr->msg_type),
+ msg_len, data_offset, data_len, skb->len);
return 0;
}
skb_pull(skb, 8 + data_offset);
@@ -540,9 +575,9 @@ rndis_tx_fixup(struct usbnet *dev, struct sk_buff *skb, gfp_t flags)
fill:
hdr = (void *) __skb_push(skb, sizeof *hdr);
memset(hdr, 0, sizeof *hdr);
- hdr->msg_type = RNDIS_MSG_PACKET;
+ hdr->msg_type = cpu_to_le32(RNDIS_MSG_PACKET);
hdr->msg_len = cpu_to_le32(skb->len);
- hdr->data_offset = ccpu2(sizeof(*hdr) - 8);
+ hdr->data_offset = cpu_to_le32(sizeof(*hdr) - 8);
hdr->data_len = cpu_to_le32(len);
/* FIXME make the last packet always be short ... */
@@ -553,7 +588,7 @@ EXPORT_SYMBOL_GPL(rndis_tx_fixup);
static const struct driver_info rndis_info = {
.description = "RNDIS device",
- .flags = FLAG_ETHER | FLAG_FRAMING_RN | FLAG_NO_SETINT,
+ .flags = FLAG_ETHER | FLAG_POINTTOPOINT | FLAG_FRAMING_RN | FLAG_NO_SETINT,
.bind = rndis_bind,
.unbind = rndis_unbind,
.status = rndis_status,
@@ -561,19 +596,36 @@ static const struct driver_info rndis_info = {
.tx_fixup = rndis_tx_fixup,
};
-#undef ccpu2
-
+static const struct driver_info rndis_poll_status_info = {
+ .description = "RNDIS device (poll status before control)",
+ .flags = FLAG_ETHER | FLAG_POINTTOPOINT | FLAG_FRAMING_RN | FLAG_NO_SETINT,
+ .data = RNDIS_DRIVER_DATA_POLL_STATUS,
+ .bind = rndis_bind,
+ .unbind = rndis_unbind,
+ .status = rndis_status,
+ .rx_fixup = rndis_rx_fixup,
+ .tx_fixup = rndis_tx_fixup,
+};
/*-------------------------------------------------------------------------*/
static const struct usb_device_id products [] = {
{
+ /* 2Wire HomePortal 1000SW */
+ USB_DEVICE_AND_INTERFACE_INFO(0x1630, 0x0042,
+ USB_CLASS_COMM, 2 /* ACM */, 0x0ff),
+ .driver_info = (unsigned long) &rndis_poll_status_info,
+}, {
/* RNDIS is MSFT's un-official variant of CDC ACM */
USB_INTERFACE_INFO(USB_CLASS_COMM, 2 /* ACM */, 0x0ff),
.driver_info = (unsigned long) &rndis_info,
}, {
/* "ActiveSync" is an undocumented variant of RNDIS, used in WM5 */
USB_INTERFACE_INFO(USB_CLASS_MISC, 1, 1),
+ .driver_info = (unsigned long) &rndis_poll_status_info,
+}, {
+ /* RNDIS for tethering */
+ USB_INTERFACE_INFO(USB_CLASS_WIRELESS_CONTROLLER, 1, 3),
.driver_info = (unsigned long) &rndis_info,
},
{ }, // END
@@ -587,19 +639,10 @@ static struct usb_driver rndis_driver = {
.disconnect = usbnet_disconnect,
.suspend = usbnet_suspend,
.resume = usbnet_resume,
+ .disable_hub_initiated_lpm = 1,
};
-static int __init rndis_init(void)
-{
- return usb_register(&rndis_driver);
-}
-module_init(rndis_init);
-
-static void __exit rndis_exit(void)
-{
- usb_deregister(&rndis_driver);
-}
-module_exit(rndis_exit);
+module_usb_driver(rndis_driver);
MODULE_AUTHOR("David Brownell");
MODULE_DESCRIPTION("USB Host side RNDIS driver");
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-10 07:22:17 +0000