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/*
* 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, S_IRUGO);
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, S_IRUGO);
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, S_IRUGO);
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, S_IRUGO);
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, S_IRUGO);
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, S_IRUGO);
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;
if (skb->destructor) {
skb->destructor(skb);
return;
}
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_UNKOWN;
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_UNKOWN;
spin_lock_irqsave(&rmnet_checksum_ul_stats, flags);
checksum_ul_stats[rc]++;
spin_unlock_irqrestore(&rmnet_checksum_ul_stats, flags);
}
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