1 files changed, 83 insertions, 220 deletions

diff --git a/drivers/net/usb/rndis_host.c b/drivers/net/usb/rndis_host.c
index 1ebe3259be0d..a61324757b17 100644
--- a/drivers/net/usb/rndis_host.c
+++ b/drivers/net/usb/rndis_host.c
@@ -29,8 +29,8 @@
 #include <linux/mii.h>
 #include <linux/usb.h>
 #include <linux/usb/cdc.h>
-
-#include "usbnet.h"
+#include <linux/usb/usbnet.h>
+#include <linux/usb/rndis_host.h>
 
 
 /*
@@ -56,217 +56,17 @@
  */
 
 /*
- * CONTROL uses CDC "encapsulated commands" with funky notifications.
- *  - control-out:  SEND_ENCAPSULATED
- *  - interrupt-in:  RESPONSE_AVAILABLE
- *  - control-in:  GET_ENCAPSULATED
- *
- * We'll try to ignore the RESPONSE_AVAILABLE notifications.
- *
- * REVISIT some RNDIS implementations seem to have curious issues still
- * to be resolved.
- */
-struct rndis_msg_hdr {
-        __le32  msg_type;                       /* RNDIS_MSG_* */
-        __le32  msg_len;
-        // followed by data that varies between messages
-        __le32  request_id;
-        __le32  status;
-        // ... and more
-} __attribute__ ((packed));
-
-/* MS-Windows uses this strange size, but RNDIS spec says 1024 minimum */
-#define CONTROL_BUFFER_SIZE             1025
-
-/* RNDIS defines an (absurdly huge) 10 second control timeout,
- * but ActiveSync seems to use a more usual 5 second timeout
- * (which matches the USB 2.0 spec).
- */
-#define RNDIS_CONTROL_TIMEOUT_MS        (5 * 1000)
-
-
-#define ccpu2 __constant_cpu_to_le32
-
-#define RNDIS_MSG_COMPLETION    ccpu2(0x80000000)
-
-/* codes for "msg_type" field of rndis messages;
- * only the data channel uses packet messages (maybe batched);
- * everything else goes on the control channel.
- */
-#define RNDIS_MSG_PACKET        ccpu2(0x00000001)       /* 1-N packets */
-#define RNDIS_MSG_INIT          ccpu2(0x00000002)
-#define RNDIS_MSG_INIT_C        (RNDIS_MSG_INIT|RNDIS_MSG_COMPLETION)
-#define RNDIS_MSG_HALT          ccpu2(0x00000003)
-#define RNDIS_MSG_QUERY         ccpu2(0x00000004)
-#define RNDIS_MSG_QUERY_C       (RNDIS_MSG_QUERY|RNDIS_MSG_COMPLETION)
-#define RNDIS_MSG_SET           ccpu2(0x00000005)
-#define RNDIS_MSG_SET_C         (RNDIS_MSG_SET|RNDIS_MSG_COMPLETION)
-#define RNDIS_MSG_RESET         ccpu2(0x00000006)
-#define RNDIS_MSG_RESET_C       (RNDIS_MSG_RESET|RNDIS_MSG_COMPLETION)
-#define RNDIS_MSG_INDICATE      ccpu2(0x00000007)
-#define RNDIS_MSG_KEEPALIVE     ccpu2(0x00000008)
-#define RNDIS_MSG_KEEPALIVE_C   (RNDIS_MSG_KEEPALIVE|RNDIS_MSG_COMPLETION)
-
-/* codes for "status" field of completion messages */
-#define RNDIS_STATUS_SUCCESS            ccpu2(0x00000000)
-#define RNDIS_STATUS_FAILURE            ccpu2(0xc0000001)
-#define RNDIS_STATUS_INVALID_DATA       ccpu2(0xc0010015)
-#define RNDIS_STATUS_NOT_SUPPORTED      ccpu2(0xc00000bb)
-#define RNDIS_STATUS_MEDIA_CONNECT      ccpu2(0x4001000b)
-#define RNDIS_STATUS_MEDIA_DISCONNECT   ccpu2(0x4001000c)
-
-
-struct rndis_data_hdr {
-        __le32  msg_type;               /* RNDIS_MSG_PACKET */
-        __le32  msg_len;                // rndis_data_hdr + data_len + pad
-        __le32  data_offset;            // 36 -- right after header
-        __le32  data_len;               // ... real packet size
-
-        __le32  oob_data_offset;        // zero
-        __le32  oob_data_len;           // zero
-        __le32  num_oob;                // zero
-        __le32  packet_data_offset;     // zero
-
-        __le32  packet_data_len;        // zero
-        __le32  vc_handle;              // zero
-        __le32  reserved;               // zero
-} __attribute__ ((packed));
-
-struct rndis_init {             /* OUT */
-        // header and:
-        __le32  msg_type;                       /* RNDIS_MSG_INIT */
-        __le32  msg_len;                        // 24
-        __le32  request_id;
-        __le32  major_version;                  // of rndis (1.0)
-        __le32  minor_version;
-        __le32  max_transfer_size;
-} __attribute__ ((packed));
-
-struct rndis_init_c {           /* IN */
-        // header and:
-        __le32  msg_type;                       /* RNDIS_MSG_INIT_C */
-        __le32  msg_len;
-        __le32  request_id;
-        __le32  status;
-        __le32  major_version;                  // of rndis (1.0)
-        __le32  minor_version;
-        __le32  device_flags;
-        __le32  medium;                         // zero == 802.3
-        __le32  max_packets_per_message;
-        __le32  max_transfer_size;
-        __le32  packet_alignment;               // max 7; (1<<n) bytes
-        __le32  af_list_offset;                 // zero
-        __le32  af_list_size;                   // zero
-} __attribute__ ((packed));
-
-struct rndis_halt {             /* OUT (no reply) */
-        // header and:
-        __le32  msg_type;                       /* RNDIS_MSG_HALT */
-        __le32  msg_len;
-        __le32  request_id;
-} __attribute__ ((packed));
-
-struct rndis_query {            /* OUT */
-        // header and:
-        __le32  msg_type;                       /* RNDIS_MSG_QUERY */
-        __le32  msg_len;
-        __le32  request_id;
-        __le32  oid;
-        __le32  len;
-        __le32  offset;
-/*?*/   __le32  handle;                         // zero
-} __attribute__ ((packed));
-
-struct rndis_query_c {          /* IN */
-        // header and:
-        __le32  msg_type;                       /* RNDIS_MSG_QUERY_C */
-        __le32  msg_len;
-        __le32  request_id;
-        __le32  status;
-        __le32  len;
-        __le32  offset;
-} __attribute__ ((packed));
-
-struct rndis_set {              /* OUT */
-        // header and:
-        __le32  msg_type;                       /* RNDIS_MSG_SET */
-        __le32  msg_len;
-        __le32  request_id;
-        __le32  oid;
-        __le32  len;
-        __le32  offset;
-/*?*/   __le32  handle;                         // zero
-} __attribute__ ((packed));
-
-struct rndis_set_c {            /* IN */
-        // header and:
-        __le32  msg_type;                       /* RNDIS_MSG_SET_C */
-        __le32  msg_len;
-        __le32  request_id;
-        __le32  status;
-} __attribute__ ((packed));
-
-struct rndis_reset {            /* IN */
-        // header and:
-        __le32  msg_type;                       /* RNDIS_MSG_RESET */
-        __le32  msg_len;
-        __le32  reserved;
-} __attribute__ ((packed));
-
-struct rndis_reset_c {          /* OUT */
-        // header and:
-        __le32  msg_type;                       /* RNDIS_MSG_RESET_C */
-        __le32  msg_len;
-        __le32  status;
-        __le32  addressing_lost;
-} __attribute__ ((packed));
-
-struct rndis_indicate {         /* IN (unrequested) */
-        // header and:
-        __le32  msg_type;                       /* RNDIS_MSG_INDICATE */
-        __le32  msg_len;
-        __le32  status;
-        __le32  length;
-        __le32  offset;
-/**/    __le32  diag_status;
-        __le32  error_offset;
-/**/    __le32  message;
-} __attribute__ ((packed));
-
-struct rndis_keepalive {        /* OUT (optionally IN) */
-        // header and:
-        __le32  msg_type;                       /* RNDIS_MSG_KEEPALIVE */
-        __le32  msg_len;
-        __le32  request_id;
-} __attribute__ ((packed));
-
-struct rndis_keepalive_c {      /* IN (optionally OUT) */
-        // header and:
-        __le32  msg_type;                       /* RNDIS_MSG_KEEPALIVE_C */
-        __le32  msg_len;
-        __le32  request_id;
-        __le32  status;
-} __attribute__ ((packed));
-
-/* NOTE:  about 30 OIDs are "mandatory" for peripherals to support ... and
- * there are gobs more that may optionally be supported.  We'll avoid as much
- * of that mess as possible.
- */
-#define OID_802_3_PERMANENT_ADDRESS     ccpu2(0x01010101)
-#define OID_GEN_MAXIMUM_FRAME_SIZE      ccpu2(0x00010106)
-#define OID_GEN_CURRENT_PACKET_FILTER   ccpu2(0x0001010e)
-
-/*
  * RNDIS notifications from device: command completion; "reverse"
  * keepalives; etc
  */
-static void rndis_status(struct usbnet *dev, struct urb *urb)
+void rndis_status(struct usbnet *dev, struct urb *urb)
 {
         devdbg(dev, "rndis status urb, len %d stat %d",
                 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);
 
 /*
  * RPC done RNDIS-style.  Caller guarantees:
@@ -278,7 +78,7 @@ static void rndis_status(struct usbnet *dev, struct urb *urb)
  * Call context is likely probe(), before interface name is known,
  * which is why we won't try to use it in the diagnostics.
  */
-static int rndis_command(struct usbnet *dev, struct rndis_msg_hdr *buf)
+int rndis_command(struct usbnet *dev, struct rndis_msg_hdr *buf)
 {
         struct cdc_state        *info = (void *) &dev->data;
         int                     master_ifnum;
@@ -347,10 +147,26 @@ static int rndis_command(struct usbnet *dev, struct rndis_msg_hdr *buf)
                                         request_id, xid);
                                 /* then likely retry */
                         } else switch (buf->msg_type) {
-                        case RNDIS_MSG_INDICATE: {      /* fault */
-                                // struct rndis_indicate *msg = (void *)buf;
-                                dev_info(&info->control->dev,
-                                        "rndis fault indication\n");
+                        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));
+                                }
                                 }
                                 break;
                         case RNDIS_MSG_KEEPALIVE: {     /* ping */
@@ -387,6 +203,7 @@ static int rndis_command(struct usbnet *dev, struct rndis_msg_hdr *buf)
         dev_dbg(&info->control->dev, "rndis response timeout\n");
         return -ETIMEDOUT;
 }
+EXPORT_SYMBOL_GPL(rndis_command);
 
 /*
  * rndis_query:
@@ -453,7 +270,8 @@ response_error:
         return -EDOM;
 }
 
-static int rndis_bind(struct usbnet *dev, struct usb_interface *intf)
+int
+generic_rndis_bind(struct usbnet *dev, struct usb_interface *intf, int flags)
 {
         int                     retval;
         struct net_device       *net = dev->net;
@@ -467,8 +285,9 @@ static int rndis_bind(struct usbnet *dev, struct usb_interface *intf)
                 struct rndis_query_c    *get_c;
                 struct rndis_set        *set;
                 struct rndis_set_c      *set_c;
+                struct rndis_halt       *halt;
         } u;
-        u32                     tmp;
+        u32                     tmp, *phym;
         int                     reply_len;
         unsigned char           *bp;
 
@@ -517,7 +336,7 @@ static int rndis_bind(struct usbnet *dev, struct usb_interface *intf)
                                 "dev can't take %u byte packets (max %u)\n",
                                 dev->hard_mtu, tmp);
                         retval = -EINVAL;
-                        goto fail_and_release;
+                        goto halt_fail_and_release;
                 }
                 dev->hard_mtu = tmp;
                 net->mtu = dev->hard_mtu - net->hard_header_len;
@@ -533,13 +352,43 @@ static int rndis_bind(struct usbnet *dev, struct usb_interface *intf)
                 dev->hard_mtu, tmp, dev->rx_urb_size,
                 1 << le32_to_cpu(u.init_c->packet_alignment));
 
+        /* module has some device initialization code needs to be done right
+         * after RNDIS_INIT */
+        if (dev->driver_info->early_init &&
+                        dev->driver_info->early_init(dev) != 0)
+                goto halt_fail_and_release;
+
+        /* Check physical medium */
+        reply_len = sizeof *phym;
+        retval = rndis_query(dev, intf, u.buf, OID_GEN_PHYSICAL_MEDIUM,
+                        0, (void **) &phym, &reply_len);
+        if (retval != 0)
+                /* OID is optional so don't fail here. */
+                *phym = RNDIS_PHYSICAL_MEDIUM_UNSPECIFIED;
+        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");
+                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");
+                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);
         if (unlikely(retval< 0)) {
                 dev_err(&intf->dev, "rndis get ethaddr, %d\n", retval);
-                goto fail_and_release;
+                goto halt_fail_and_release;
         }
         memcpy(net->dev_addr, bp, ETH_ALEN);
 
@@ -550,12 +399,12 @@ static int rndis_bind(struct usbnet *dev, struct usb_interface *intf)
         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) = ccpu2(DEFAULT_FILTER);
+        *(__le32 *)(u.buf + sizeof *u.set) = RNDIS_DEFAULT_FILTER;
 
         retval = rndis_command(dev, u.header);
         if (unlikely(retval < 0)) {
                 dev_err(&intf->dev, "rndis set packet filter, %d\n", retval);
-                goto fail_and_release;
+                goto halt_fail_and_release;
         }
 
         retval = 0;
@@ -563,6 +412,11 @@ static int rndis_bind(struct usbnet *dev, struct usb_interface *intf)
         kfree(u.buf);
         return retval;
 
+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);
 fail_and_release:
         usb_set_intfdata(info->data, NULL);
         usb_driver_release_interface(driver_of(intf), info->data);
@@ -571,13 +425,19 @@ fail:
         kfree(u.buf);
         return retval;
 }
+EXPORT_SYMBOL_GPL(generic_rndis_bind);
+
+static int rndis_bind(struct usbnet *dev, struct usb_interface *intf)
+{
+        return generic_rndis_bind(dev, intf, FLAG_RNDIS_PHYM_NOT_WIRELESS);
+}
 
-static void rndis_unbind(struct usbnet *dev, struct usb_interface *intf)
+void rndis_unbind(struct usbnet *dev, struct usb_interface *intf)
 {
         struct rndis_halt       *halt;
 
         /* try to clear any rndis state/activity (no i/o from stack!) */
-        halt = kzalloc(sizeof *halt, GFP_KERNEL);
+        halt = kzalloc(CONTROL_BUFFER_SIZE, GFP_KERNEL);
         if (halt) {
                 halt->msg_type = RNDIS_MSG_HALT;
                 halt->msg_len = ccpu2(sizeof *halt);
@@ -585,13 +445,14 @@ static void rndis_unbind(struct usbnet *dev, struct usb_interface *intf)
                 kfree(halt);
         }
 
-        return usbnet_cdc_unbind(dev, intf);
+        usbnet_cdc_unbind(dev, intf);
 }
+EXPORT_SYMBOL_GPL(rndis_unbind);
 
 /*
  * DATA -- host must not write zlps
  */
-static int rndis_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
+int rndis_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
 {
         /* peripheral may have batched packets to us... */
         while (likely(skb->len)) {
@@ -633,8 +494,9 @@ static int rndis_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
         /* caller will usbnet_skb_return the remaining packet */
         return 1;
 }
+EXPORT_SYMBOL_GPL(rndis_rx_fixup);
 
-static struct sk_buff *
+struct sk_buff *
 rndis_tx_fixup(struct usbnet *dev, struct sk_buff *skb, gfp_t flags)
 {
         struct rndis_data_hdr   *hdr;
@@ -679,6 +541,7 @@ fill:
         /* FIXME make the last packet always be short ... */
         return skb;
 }
+EXPORT_SYMBOL_GPL(rndis_tx_fixup);
 
 
 static const struct driver_info rndis_info = {