1/* Broadcom NetXtreme-C/E network driver.
2 *
3 * Copyright (c) 2017-2018 Broadcom Limited
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation.
8 */
9
10#include <linux/debugfs.h>
11#include <linux/module.h>
12#include <linux/pci.h>
13#include "bnxt_hsi.h"
14#include <linux/dim.h>
15#include "bnxt.h"
16#include "bnxt_debugfs.h"
17
18static struct dentry *bnxt_debug_mnt;
19
20static ssize_t debugfs_dim_read(struct file *filep,
21				char __user *buffer,
22				size_t count, loff_t *ppos)
23{
24	struct dim *dim = filep->private_data;
25	int len;
26	char *buf;
27
28	if (*ppos)
29		return 0;
30	if (!dim)
31		return -ENODEV;
32	buf = kasprintf(GFP_KERNEL,
33			"state = %d\n" \
34			"profile_ix = %d\n" \
35			"mode = %d\n" \
36			"tune_state = %d\n" \
37			"steps_right = %d\n" \
38			"steps_left = %d\n" \
39			"tired = %d\n",
40			dim->state,
41			dim->profile_ix,
42			dim->mode,
43			dim->tune_state,
44			dim->steps_right,
45			dim->steps_left,
46			dim->tired);
47	if (!buf)
48		return -ENOMEM;
49	if (count < strlen(buf)) {
50		kfree(buf);
51		return -ENOSPC;
52	}
53	len = simple_read_from_buffer(buffer, count, ppos, buf, strlen(buf));
54	kfree(buf);
55	return len;
56}
57
58static const struct file_operations debugfs_dim_fops = {
59	.owner = THIS_MODULE,
60	.open = simple_open,
61	.read = debugfs_dim_read,
62};
63
64static void debugfs_dim_ring_init(struct dim *dim, int ring_idx,
65				  struct dentry *dd)
66{
67	static char qname[16];
68
69	snprintf(qname, 10, "%d", ring_idx);
70	debugfs_create_file(qname, 0600, dd, dim, &debugfs_dim_fops);
71}
72
73void bnxt_debug_dev_init(struct bnxt *bp)
74{
75	const char *pname = pci_name(bp->pdev);
76	struct dentry *dir;
77	int i;
78
79	bp->debugfs_pdev = debugfs_create_dir(pname, bnxt_debug_mnt);
80	dir = debugfs_create_dir("dim", bp->debugfs_pdev);
81
82	/* create files for each rx ring */
83	for (i = 0; i < bp->cp_nr_rings; i++) {
84		struct bnxt_cp_ring_info *cpr = &bp->bnapi[i]->cp_ring;
85
86		if (cpr && bp->bnapi[i]->rx_ring)
87			debugfs_dim_ring_init(&cpr->dim, i, dir);
88	}
89}
90
91void bnxt_debug_dev_exit(struct bnxt *bp)
92{
93	if (bp) {
94		debugfs_remove_recursive(bp->debugfs_pdev);
95		bp->debugfs_pdev = NULL;
96	}
97}
98
99void bnxt_debug_init(void)
100{
101	bnxt_debug_mnt = debugfs_create_dir("bnxt_en", NULL);
102}
103
104void bnxt_debug_exit(void)
105{
106	debugfs_remove_recursive(bnxt_debug_mnt);
107}
108