--- zzzz-none-000/linux-3.10.107/net/atm/pppoatm.c	2017-06-27 09:49:32.000000000 +0000
+++ vr9-7490-729/linux-3.10.107/net/atm/pppoatm.c	2021-11-10 11:53:56.000000000 +0000
@@ -33,6 +33,12 @@
  * These hooks are not yet available in ppp_generic
  */
 
+/**
+ * Some part of this file is modified by Ikanos Communications. 
+ *
+ * Copyright (C) 2013-2014 Ikanos Communications.
+ */  
+
 #define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__
 
 #include <linux/module.h>
@@ -50,6 +56,14 @@
 
 #include "common.h"
 
+#if defined(CONFIG_MACH_FUSIV)
+#define LLC_PPPOA_OVERHEAD 6
+#define VC_PPPOA_OVERHEAD 2
+extern int (*AtmUpdateNewVCInfo_ptr)(int encap, struct atm_vcc *atmvcc, int moduleId, char *ifname);
+extern int (*AtmDeleteVCInfo_ptr)(short vpi,int vci);
+extern int get_PPPOAOverhead(struct ppp_channel *ppp_chan);
+#endif
+
 enum pppoatm_encaps {
 	e_autodetect = PPPOATM_ENCAPS_AUTODETECT,
 	e_vc = PPPOATM_ENCAPS_VC,
@@ -169,6 +183,10 @@
 {
 	struct pppoatm_vcc *pvcc;
 	pvcc = atmvcc_to_pvcc(atmvcc);
+
+#if defined(CONFIG_MACH_FUSIV)
+	(*AtmDeleteVCInfo_ptr)(atmvcc->vpi,atmvcc->vci);
+#endif
 	atmvcc->push = pvcc->old_push;
 	atmvcc->pop = pvcc->old_pop;
 	atmvcc->release_cb = pvcc->old_release_cb;
@@ -196,10 +214,12 @@
 	atm_return(atmvcc, skb->truesize);
 	switch (pvcc->encaps) {
 	case e_llc:
+#if !defined(CONFIG_MACH_FUSIV)
 		if (skb->len < LLC_LEN ||
 		    memcmp(skb->data, pppllc, LLC_LEN))
 			goto error;
 		skb_pull(skb, LLC_LEN);
+#endif
 		break;
 	case e_autodetect:
 		if (pvcc->chan.ppp == NULL) {	/* Not bound yet! */
@@ -385,7 +405,22 @@
 	return -ENOTTY;
 }
 
+#if defined(CONFIG_MACH_FUSIV)
+int getInfaceUnit(void* atmVCC)
+{
+        int unit = -1;
+        struct atm_vcc *atmvcc = (struct atm_vcc *)atmVCC;
+        struct pppoatm_vcc *pvcc = atmvcc_to_pvcc(atmvcc);
+        unit = ppp_unit_number(&(pvcc->chan));
+        return unit;
+}
+#endif
+
+#if defined(CONFIG_MACH_FUSIV)
+static /*const*/ struct ppp_channel_ops pppoatm_ops = {
+#else
 static const struct ppp_channel_ops pppoatm_ops = {
+#endif
 	.start_xmit = pppoatm_send,
 	.ioctl = pppoatm_devppp_ioctl,
 };
@@ -434,7 +469,9 @@
 	atmvcc->release_cb = pppoatm_release_cb;
 	__module_get(THIS_MODULE);
 	atmvcc->owner = THIS_MODULE;
-
+#if defined(CONFIG_MACH_FUSIV)
+        (*AtmUpdateNewVCInfo_ptr)(be.encaps, atmvcc, ADI_PPPOA_MODULE, "ppp0");
+#endif
 	/* re-process everything received between connection setup and
 	   backend setup */
 	vcc_process_recv_queue(atmvcc);
@@ -466,6 +503,22 @@
 			return -EINVAL;
 		return pppoatm_assign_vcc(atmvcc, argp);
 		}
+#if defined(CONFIG_MACH_FUSIV)
+          case ATM_DEL_INTERFACE:
+                {
+                atm_backend_t b;
+                if (get_user(b, (atm_backend_t *) arg))
+                        return -EFAULT;
+                if (b != ATM_BACKEND_PPP)
+                        return -ENOIOCTLCMD;
+                if (!capable(CAP_NET_ADMIN))
+                        return -EPERM;
+                pppoatm_unassign_vcc(atmvcc);
+
+                }
+
+                return 0;
+#endif
 	case PPPIOCGCHAN:
 		return put_user(ppp_channel_index(&atmvcc_to_pvcc(atmvcc)->
 		    chan), (int __user *) argp) ? -EFAULT : 0;
@@ -476,6 +529,32 @@
 	return -ENOIOCTLCMD;
 }
 
+#if defined(CONFIG_MACH_FUSIV)
+int isPPPModTypePPPoA(struct ppp_channel *pppchan)
+{
+    if ((pppchan->ops) &&
+        (pppchan->ops->start_xmit) &&
+        (pppchan->ops->start_xmit == pppoatm_send))
+        return 1;
+
+    return 0;
+}
+
+
+int get_PPPOAOverhead(struct ppp_channel *pppchan)
+{
+  struct pppoatm_vcc *pvcc = chan_to_pvcc(pppchan);
+  if (pvcc->encaps == e_llc)
+   {
+     return LLC_PPPOA_OVERHEAD; 
+   }
+  else
+   {
+     return VC_PPPOA_OVERHEAD;
+   }
+}
+#endif
+
 static struct atm_ioctl pppoatm_ioctl_ops = {
 	.owner	= THIS_MODULE,
 	.ioctl	= pppoatm_ioctl,
@@ -495,6 +574,13 @@
 module_init(pppoatm_init);
 module_exit(pppoatm_exit);
 
+#if defined(CONFIG_MACH_FUSIV)
+EXPORT_SYMBOL(isPPPModTypePPPoA);
+EXPORT_SYMBOL(getInfaceUnit);
+
+EXPORT_SYMBOL(get_PPPOAOverhead);
+#endif
+
 MODULE_AUTHOR("Mitchell Blank Jr <mitch@sfgoth.com>");
 MODULE_DESCRIPTION("RFC2364 PPP over ATM/AAL5");
 MODULE_LICENSE("GPL");