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
18 static struct dentry *bnxt_debug_mnt;
19
debugfs_dim_read(struct file * filep,char __user * buffer,size_t count,loff_t * ppos)20 static 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
58 static const struct file_operations debugfs_dim_fops = {
59 .owner = THIS_MODULE,
60 .open = simple_open,
61 .read = debugfs_dim_read,
62 };
63
debugfs_dim_ring_init(struct dim * dim,int ring_idx,struct dentry * dd)64 static 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
bnxt_debug_dev_init(struct bnxt * bp)73 void 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
bnxt_debug_dev_exit(struct bnxt * bp)91 void 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
bnxt_debug_init(void)99 void bnxt_debug_init(void)
100 {
101 bnxt_debug_mnt = debugfs_create_dir("bnxt_en", NULL);
102 }
103
bnxt_debug_exit(void)104 void bnxt_debug_exit(void)
105 {
106 debugfs_remove_recursive(bnxt_debug_mnt);
107 }
108