core: rmnet: Fastforward to 4.19 tip

This brings the RmNet and DFC modules up to date with the 4.19 tip as of
commit 9b38611ea527 ("rmnet: Reduce synchronize_rcu calls").

As part of this, the rmnet_ctl driver was also incorporated, using commit
4ceee3aafb7d ("rmnet_ctl: Add IPC logging and optimizations")

Change-Id: Ic45d46074c7401dfed408c769cfb6462dac0d4ee
Signed-off-by: Sean Tranchetti <stranche@codeaurora.org>

core/rmnet_config.h

@@ -1,4 +1,4 @@
-/* Copyright (c) 2013-2014, 2016-2019 The Linux Foundation. All rights reserved.
+/* Copyright (c) 2013-2014, 2016-2020 The Linux Foundation. All rights reserved.
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 and
@@ -28,6 +28,11 @@ struct rmnet_endpoint {
 	struct hlist_node hlnode;
 };
 
+struct rmnet_agg_stats {
+	u64 ul_agg_reuse;
+	u64 ul_agg_alloc;
+};
+
 struct rmnet_port_priv_stats {
 	u64 dl_hdr_last_qmap_vers;
 	u64 dl_hdr_last_ep_id;
@@ -41,14 +46,22 @@ struct rmnet_port_priv_stats {
 	u64 dl_hdr_total_pkts;
 	u64 dl_trl_last_seq;
 	u64 dl_trl_count;
+	struct rmnet_agg_stats agg;
 };
 
 struct rmnet_egress_agg_params {
 	u16 agg_size;
-	u16 agg_count;
+	u8 agg_count;
+	u8 agg_features;
 	u32 agg_time;
 };
 
+struct rmnet_agg_page {
+	struct list_head list;
+	struct page *page;
+};
+
+
 /* One instance of this structure is instantiated for each real_dev associated
  * with rmnet.
  */
@@ -73,12 +86,16 @@ struct rmnet_port {
 	struct timespec64 agg_last;
 	struct hrtimer hrtimer;
 	struct work_struct agg_wq;
+	u8 agg_size_order;
+	struct list_head agg_list;
+	struct rmnet_agg_page *agg_head;
 
 	void *qmi_info;
 
 	/* dl marker elements */
 	struct list_head dl_list;
 	struct rmnet_port_priv_stats stats;
+	int dl_marker_flush;
 
 	/* Descriptor pool */
 	spinlock_t desc_pool_lock;
@@ -137,6 +154,7 @@ struct rmnet_priv_stats {
 	u64 csum_sw;
 	u64 csum_hw;
 	struct rmnet_coal_stats coal;
+	u64 ul_prio;
 };
 
 struct rmnet_priv {