net: rmnet_data: Add snapshot of rmnet_data driver
This is a snapshot of the rmnet_data driver taken as of msm-4.4.
commit 5da00923b1544ba ("rmnet_data: Changing format specifier to
%pK").
Additionally, fix some style issues reported by checkpatch.
CRs-Fixed: 1078373
Change-Id: Idb2df22e61803e04a01db64ea5e9d1e93ae92e09
Signed-off-by: Subash Abhinov Kasiviswanathan <subashab@codeaurora.org>
diff --git a/net/rmnet_data/rmnet_data_stats.c b/net/rmnet_data/rmnet_data_stats.c
new file mode 100644
index 0000000..f4aa492
--- /dev/null
+++ b/net/rmnet_data/rmnet_data_stats.c
@@ -0,0 +1,143 @@
+/* Copyright (c) 2014, 2016 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
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ *
+ * RMNET Data statistics
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/export.h>
+#include <linux/skbuff.h>
+#include <linux/spinlock.h>
+#include <linux/netdevice.h>
+#include <net/rmnet_config.h>
+#include "rmnet_data_private.h"
+#include "rmnet_data_stats.h"
+#include "rmnet_data_config.h"
+#include "rmnet_map.h"
+
+enum rmnet_deagg_e {
+ RMNET_STATS_AGG_BUFF,
+ RMNET_STATS_AGG_PKT,
+ RMNET_STATS_AGG_MAX
+};
+
+static DEFINE_SPINLOCK(rmnet_skb_free_lock);
+unsigned long int skb_free[RMNET_STATS_SKBFREE_MAX];
+module_param_array(skb_free, ulong, 0, 0444);
+MODULE_PARM_DESC(skb_free, "SKBs dropped or freed");
+
+static DEFINE_SPINLOCK(rmnet_queue_xmit_lock);
+unsigned long int queue_xmit[RMNET_STATS_QUEUE_XMIT_MAX * 2];
+module_param_array(queue_xmit, ulong, 0, 0444);
+MODULE_PARM_DESC(queue_xmit, "SKBs queued for transmit");
+
+static DEFINE_SPINLOCK(rmnet_deagg_count);
+unsigned long int deagg_count[RMNET_STATS_AGG_MAX];
+module_param_array(deagg_count, ulong, 0, 0444);
+MODULE_PARM_DESC(deagg_count, "SKBs De-aggregated");
+
+static DEFINE_SPINLOCK(rmnet_agg_count);
+unsigned long int agg_count[RMNET_STATS_AGG_MAX];
+module_param_array(agg_count, ulong, 0, 0444);
+MODULE_PARM_DESC(agg_count, "SKBs Aggregated");
+
+static DEFINE_SPINLOCK(rmnet_checksum_dl_stats);
+unsigned long int checksum_dl_stats[RMNET_MAP_CHECKSUM_ENUM_LENGTH];
+module_param_array(checksum_dl_stats, ulong, 0, 0444);
+MODULE_PARM_DESC(checksum_dl_stats, "Downlink Checksum Statistics");
+
+static DEFINE_SPINLOCK(rmnet_checksum_ul_stats);
+unsigned long int checksum_ul_stats[RMNET_MAP_CHECKSUM_ENUM_LENGTH];
+module_param_array(checksum_ul_stats, ulong, 0, 0444);
+MODULE_PARM_DESC(checksum_ul_stats, "Uplink Checksum Statistics");
+
+void rmnet_kfree_skb(struct sk_buff *skb, unsigned int reason)
+{
+ unsigned long flags;
+
+ if (reason >= RMNET_STATS_SKBFREE_MAX)
+ reason = RMNET_STATS_SKBFREE_UNKNOWN;
+
+ spin_lock_irqsave(&rmnet_skb_free_lock, flags);
+ skb_free[reason]++;
+ spin_unlock_irqrestore(&rmnet_skb_free_lock, flags);
+
+ if (likely(skb)) {
+ struct rmnet_phys_ep_conf_s *config;
+
+ config = (struct rmnet_phys_ep_conf_s *)rcu_dereference
+ (skb->dev->rx_handler_data);
+ if (likely(config))
+ config->recycle(skb);
+ else
+ kfree_skb(skb);
+ }
+}
+
+void rmnet_stats_queue_xmit(int rc, unsigned int reason)
+{
+ unsigned long flags;
+
+ if (rc != 0)
+ reason += RMNET_STATS_QUEUE_XMIT_MAX;
+ if (reason >= RMNET_STATS_QUEUE_XMIT_MAX * 2)
+ reason = RMNET_STATS_SKBFREE_UNKNOWN;
+
+ spin_lock_irqsave(&rmnet_queue_xmit_lock, flags);
+ queue_xmit[reason]++;
+ spin_unlock_irqrestore(&rmnet_queue_xmit_lock, flags);
+}
+
+void rmnet_stats_agg_pkts(int aggcount)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&rmnet_agg_count, flags);
+ agg_count[RMNET_STATS_AGG_BUFF]++;
+ agg_count[RMNET_STATS_AGG_PKT] += aggcount;
+ spin_unlock_irqrestore(&rmnet_agg_count, flags);
+}
+
+void rmnet_stats_deagg_pkts(int aggcount)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&rmnet_deagg_count, flags);
+ deagg_count[RMNET_STATS_AGG_BUFF]++;
+ deagg_count[RMNET_STATS_AGG_PKT] += aggcount;
+ spin_unlock_irqrestore(&rmnet_deagg_count, flags);
+}
+
+void rmnet_stats_dl_checksum(unsigned int rc)
+{
+ unsigned long flags;
+
+ if (rc >= RMNET_MAP_CHECKSUM_ENUM_LENGTH)
+ rc = RMNET_MAP_CHECKSUM_ERR_UNKNOWN;
+
+ spin_lock_irqsave(&rmnet_checksum_dl_stats, flags);
+ checksum_dl_stats[rc]++;
+ spin_unlock_irqrestore(&rmnet_checksum_dl_stats, flags);
+}
+
+void rmnet_stats_ul_checksum(unsigned int rc)
+{
+ unsigned long flags;
+
+ if (rc >= RMNET_MAP_CHECKSUM_ENUM_LENGTH)
+ rc = RMNET_MAP_CHECKSUM_ERR_UNKNOWN;
+
+ spin_lock_irqsave(&rmnet_checksum_ul_stats, flags);
+ checksum_ul_stats[rc]++;
+ spin_unlock_irqrestore(&rmnet_checksum_ul_stats, flags);
+}