1// SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause)
2/* Copyright 2015 Freescale Semiconductor Inc.
3 * Copyright 2018-2019 NXP
4 */
5#include <linux/module.h>
6#include <linux/debugfs.h>
7#include "dpaa2-eth.h"
8#include "dpaa2-eth-debugfs.h"
9
10#define DPAA2_ETH_DBG_ROOT "dpaa2-eth"
11
12static struct dentry *dpaa2_dbg_root;
13
14static int dpaa2_dbg_cpu_show(struct seq_file *file, void *offset)
15{
16	struct dpaa2_eth_priv *priv = (struct dpaa2_eth_priv *)file->private;
17	struct rtnl_link_stats64 *stats;
18	struct dpaa2_eth_drv_stats *extras;
19	int i;
20
21	seq_printf(file, "Per-CPU stats for %s\n", priv->net_dev->name);
22	seq_printf(file, "%s%16s%16s%16s%16s%16s%16s%16s%16s%16s\n",
23		   "CPU", "Rx", "Rx Err", "Rx SG", "Tx", "Tx Err", "Tx conf",
24		   "Tx SG", "Tx converted to SG", "Enq busy");
25
26	for_each_online_cpu(i) {
27		stats = per_cpu_ptr(priv->percpu_stats, i);
28		extras = per_cpu_ptr(priv->percpu_extras, i);
29		seq_printf(file, "%3d%16llu%16llu%16llu%16llu%16llu%16llu%16llu%16llu%16llu\n",
30			   i,
31			   stats->rx_packets,
32			   stats->rx_errors,
33			   extras->rx_sg_frames,
34			   stats->tx_packets,
35			   stats->tx_errors,
36			   extras->tx_conf_frames,
37			   extras->tx_sg_frames,
38			   extras->tx_converted_sg_frames,
39			   extras->tx_portal_busy);
40	}
41
42	return 0;
43}
44
45DEFINE_SHOW_ATTRIBUTE(dpaa2_dbg_cpu);
46
47static char *fq_type_to_str(struct dpaa2_eth_fq *fq)
48{
49	switch (fq->type) {
50	case DPAA2_RX_FQ:
51		return "Rx";
52	case DPAA2_TX_CONF_FQ:
53		return "Tx conf";
54	default:
55		return "N/A";
56	}
57}
58
59static int dpaa2_dbg_fqs_show(struct seq_file *file, void *offset)
60{
61	struct dpaa2_eth_priv *priv = (struct dpaa2_eth_priv *)file->private;
62	struct dpaa2_eth_fq *fq;
63	u32 fcnt, bcnt;
64	int i, err;
65
66	seq_printf(file, "FQ stats for %s:\n", priv->net_dev->name);
67	seq_printf(file, "%s%16s%16s%16s%16s%16s\n",
68		   "VFQID", "CPU", "TC", "Type", "Frames", "Pending frames");
69
70	for (i = 0; i <  priv->num_fqs; i++) {
71		fq = &priv->fq[i];
72		err = dpaa2_io_query_fq_count(NULL, fq->fqid, &fcnt, &bcnt);
73		if (err)
74			fcnt = 0;
75
76		/* Skip FQs with no traffic */
77		if (!fq->stats.frames && !fcnt)
78			continue;
79
80		seq_printf(file, "%5d%16d%16d%16s%16llu%16u\n",
81			   fq->fqid,
82			   fq->target_cpu,
83			   fq->tc,
84			   fq_type_to_str(fq),
85			   fq->stats.frames,
86			   fcnt);
87	}
88
89	return 0;
90}
91
92DEFINE_SHOW_ATTRIBUTE(dpaa2_dbg_fqs);
93
94static int dpaa2_dbg_ch_show(struct seq_file *file, void *offset)
95{
96	struct dpaa2_eth_priv *priv = (struct dpaa2_eth_priv *)file->private;
97	struct dpaa2_eth_channel *ch;
98	int i;
99
100	seq_printf(file, "Channel stats for %s:\n", priv->net_dev->name);
101	seq_printf(file, "%s%16s%16s%16s%16s%16s%16s\n",
102		   "CHID", "CPU", "Deq busy", "Frames", "CDANs",
103		   "Avg Frm/CDAN", "Buf count");
104
105	for (i = 0; i < priv->num_channels; i++) {
106		ch = priv->channel[i];
107		seq_printf(file, "%4d%16d%16llu%16llu%16llu%16llu%16d\n",
108			   ch->ch_id,
109			   ch->nctx.desired_cpu,
110			   ch->stats.dequeue_portal_busy,
111			   ch->stats.frames,
112			   ch->stats.cdan,
113			   div64_u64(ch->stats.frames, ch->stats.cdan),
114			   ch->buf_count);
115	}
116
117	return 0;
118}
119
120DEFINE_SHOW_ATTRIBUTE(dpaa2_dbg_ch);
121
122void dpaa2_dbg_add(struct dpaa2_eth_priv *priv)
123{
124	struct dentry *dir;
125
126	/* Create a directory for the interface */
127	dir = debugfs_create_dir(priv->net_dev->name, dpaa2_dbg_root);
128	priv->dbg.dir = dir;
129
130	/* per-cpu stats file */
131	debugfs_create_file("cpu_stats", 0444, dir, priv, &dpaa2_dbg_cpu_fops);
132
133	/* per-fq stats file */
134	debugfs_create_file("fq_stats", 0444, dir, priv, &dpaa2_dbg_fqs_fops);
135
136	/* per-fq stats file */
137	debugfs_create_file("ch_stats", 0444, dir, priv, &dpaa2_dbg_ch_fops);
138}
139
140void dpaa2_dbg_remove(struct dpaa2_eth_priv *priv)
141{
142	debugfs_remove_recursive(priv->dbg.dir);
143}
144
145void dpaa2_eth_dbg_init(void)
146{
147	dpaa2_dbg_root = debugfs_create_dir(DPAA2_ETH_DBG_ROOT, NULL);
148	pr_debug("DPAA2-ETH: debugfs created\n");
149}
150
151void dpaa2_eth_dbg_exit(void)
152{
153	debugfs_remove(dpaa2_dbg_root);
154}
155