From 833f1ea3b0c1665ef227428cc4a88179e6a66447 Mon Sep 17 00:00:00 2001
From: Michael Adisumarta <madisuma@codeaurora.org>
Date: Wed, 22 Sep 2021 12:20:10 -0700
Subject: [PATCH] msm_rmnet.h: Add new ioctls for rmnet to reg/unreg for
 notification

Add new ioctls for rmnet to reg/unreg for yellow water mark hit
notifications.

Change-Id: Ib1162213e8fc463efaaa1149330e889110dc3dab
Signed-off-by: Michael Adisumarta <madisuma@codeaurora.org>
---
 drivers/platform/msm/ipa_fmwk/ipa_fmwk.c | 26 +++++++++++++++
 include/linux/ipa.h                      | 40 ++++++++++++++++++++++++
 include/linux/ipa_fmwk.h                 |  2 ++
 3 files changed, 68 insertions(+)

diff --git a/drivers/platform/msm/ipa_fmwk/ipa_fmwk.c b/drivers/platform/msm/ipa_fmwk/ipa_fmwk.c
index 259d9f8041cb..cd3ef31151e6 100644
--- a/drivers/platform/msm/ipa_fmwk/ipa_fmwk.c
+++ b/drivers/platform/msm/ipa_fmwk/ipa_fmwk.c
@@ -225,6 +225,10 @@ struct ipa_fmwk_contex {
 
 	int (*ipa_unregister_rmnet_ll_cb)(void);
 
+	int (*ipa_register_notifier)(void *fn_ptr);
+
+	int (*ipa_unregister_notifier)(void *fn_ptr);
+
 	/* ipa_usb APIs */
 	int (*ipa_usb_init_teth_prot)(enum ipa_usb_teth_prot teth_prot,
 		struct ipa_usb_teth_params *teth_params,
@@ -552,6 +556,8 @@ int ipa_fmwk_register_ipa(const struct ipa_core_data *in)
 	ipa_fmwk_ctx->ipa_register_rmnet_ll_cb = in->ipa_register_rmnet_ll_cb;
 	ipa_fmwk_ctx->ipa_unregister_rmnet_ll_cb =
 		in->ipa_unregister_rmnet_ll_cb;
+	ipa_fmwk_ctx->ipa_register_notifier =
+		in->ipa_unregister_notifier;
 
 	ipa_fmwk_ctx->ipa_ready = true;
 	ipa_trigger_ipa_ready_cbs();
@@ -1051,6 +1057,26 @@ int ipa_unregister_rmnet_ll_cb(void)
 }
 EXPORT_SYMBOL(ipa_unregister_rmnet_ll_cb);
 
+int ipa_register_notifier(void *fn_ptr)
+{
+	int ret;
+
+	IPA_FMWK_DISPATCH_RETURN(ipa_register_notifier, fn_ptr);
+
+	return ret;
+}
+EXPORT_SYMBOL(ipa_register_notifier);
+
+int ipa_unregister_notifier(void *fn_ptr)
+{
+	int ret;
+
+	IPA_FMWK_DISPATCH_RETURN(ipa_unregister_notifier, fn_ptr);
+
+	return ret;
+}
+EXPORT_SYMBOL(ipa_unregister_notifier);
+
 /* registration API for IPA usb module */
 int ipa_fmwk_register_ipa_usb(const struct ipa_usb_data *in)
 {
diff --git a/include/linux/ipa.h b/include/linux/ipa.h
index 0b921b291178..fa528096b133 100644
--- a/include/linux/ipa.h
+++ b/include/linux/ipa.h
@@ -36,6 +36,12 @@
 #define IPA_SOCKsv5_ADD_V4_V6_COM_PM	2
 #define IPA_SOCKsv5_ADD_V6_V6_COM_PM	3
 
+/* Notifiers for rmnet driver */
+#define BUFF_ABOVE_HIGH_THRESHOLD_FOR_DEFAULT_PIPE        1
+#define BUFF_ABOVE_HIGH_THRESHOLD_FOR_COAL_PIPE           2
+#define BUFF_BELOW_LOW_THRESHOLD_FOR_DEFAULT_PIPE         3
+#define BUFF_BELOW_LOW_THRESHOLD_FOR_COAL_PIPE            4
+
 /**
  * enum ipa_transport_type
  * transport type: either GSI or SPS
@@ -1577,6 +1583,24 @@ int ipa_rmnet_ctl_xmit(struct sk_buff *skb);
  */
 int ipa_rmnet_ll_xmit(struct sk_buff *skb);
 
+/*
+ * ipa_register_notifier - Register for IPA atomic notifier
+ *
+ * @fn_ptr - Function pointer to get the notification
+ *
+ * This funciton will return 0 on success, -EAGAIN if reg fails.
+ */
+int ipa_register_notifier(void *fn_ptr);
+
+/*
+ * ipa_unregister_notifier - Unregister for IPA atomic notifier
+ *
+ * @fn_ptr - Function pointer to get the notification
+ *
+ * This funciton will return 0 on success, -EAGAIN if reg fails.
+ */
+int ipa_unregister_notifier(void *fn_ptr);
+
 void ipa_free_skb(struct ipa_rx_data *data);
 
 /*
@@ -2008,6 +2032,22 @@ static inline int ipa_rmnet_ll_xmit(struct sk_buff *skb)
 	return -EPERM;
 }
 
+/*
+ * Rmnet Notifier register
+ */
+static inline int ipa_register_notifier(struct sk_buff *skb)
+{
+	return -EPERM;
+}
+
+/*
+ * Rmnet Notifier unregister
+ */
+static inline int ipa_unregister_notifier(struct sk_buff *skb)
+{
+	return -EPERM;
+}
+
 static inline void ipa_free_skb(struct ipa_rx_data *rx_in)
 {
 }
diff --git a/include/linux/ipa_fmwk.h b/include/linux/ipa_fmwk.h
index dd724e4f80f0..3ce9f2e9107c 100644
--- a/include/linux/ipa_fmwk.h
+++ b/include/linux/ipa_fmwk.h
@@ -135,6 +135,8 @@ struct ipa_core_data {
 		void *user_data3);
 
 	int (*ipa_unregister_rmnet_ll_cb)(void);
+	int (*ipa_register_notifier)(void *fn_ptr);
+	int (*ipa_unregister_notifier)(void *fn_ptr);
 };
 
 struct ipa_usb_data {