Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Wireless Host Controller (WHC) debug.
4 *
5 * Copyright (C) 2008 Cambridge Silicon Radio Ltd.
6 */
7#include <linux/slab.h>
8#include <linux/kernel.h>
9#include <linux/debugfs.h>
10#include <linux/seq_file.h>
11#include <linux/export.h>
12
13#include "../../wusbcore/wusbhc.h"
14
15#include "whcd.h"
16
17struct whc_dbg {
18 struct dentry *di_f;
19 struct dentry *asl_f;
20 struct dentry *pzl_f;
21};
22
23static void qset_print(struct seq_file *s, struct whc_qset *qset)
24{
25 static const char *qh_type[] = {
26 "ctrl", "isoc", "bulk", "intr", "rsvd", "rsvd", "rsvd", "lpintr", };
27 struct whc_std *std;
28 struct urb *urb = NULL;
29 int i;
30
31 seq_printf(s, "qset %08x", (u32)qset->qset_dma);
32 if (&qset->list_node == qset->whc->async_list.prev) {
33 seq_printf(s, " (dummy)\n");
34 } else {
35 seq_printf(s, " ep%d%s-%s maxpkt: %d\n",
36 qset->qh.info1 & 0x0f,
37 (qset->qh.info1 >> 4) & 0x1 ? "in" : "out",
38 qh_type[(qset->qh.info1 >> 5) & 0x7],
39 (qset->qh.info1 >> 16) & 0xffff);
40 }
41 seq_printf(s, " -> %08x\n", (u32)qset->qh.link);
42 seq_printf(s, " info: %08x %08x %08x\n",
43 qset->qh.info1, qset->qh.info2, qset->qh.info3);
44 seq_printf(s, " sts: %04x errs: %d curwin: %08x\n",
45 qset->qh.status, qset->qh.err_count, qset->qh.cur_window);
46 seq_printf(s, " TD: sts: %08x opts: %08x\n",
47 qset->qh.overlay.qtd.status, qset->qh.overlay.qtd.options);
48
49 for (i = 0; i < WHCI_QSET_TD_MAX; i++) {
50 seq_printf(s, " %c%c TD[%d]: sts: %08x opts: %08x ptr: %08x\n",
51 i == qset->td_start ? 'S' : ' ',
52 i == qset->td_end ? 'E' : ' ',
53 i, qset->qtd[i].status, qset->qtd[i].options,
54 (u32)qset->qtd[i].page_list_ptr);
55 }
56 seq_printf(s, " ntds: %d\n", qset->ntds);
57 list_for_each_entry(std, &qset->stds, list_node) {
58 if (urb != std->urb) {
59 urb = std->urb;
60 seq_printf(s, " urb %p transferred: %d bytes\n", urb,
61 urb->actual_length);
62 }
63 if (std->qtd)
64 seq_printf(s, " sTD[%td]: %zu bytes @ %08x\n",
65 std->qtd - &qset->qtd[0],
66 std->len, std->num_pointers ?
67 (u32)(std->pl_virt[0].buf_ptr) : (u32)std->dma_addr);
68 else
69 seq_printf(s, " sTD[-]: %zd bytes @ %08x\n",
70 std->len, std->num_pointers ?
71 (u32)(std->pl_virt[0].buf_ptr) : (u32)std->dma_addr);
72 }
73}
74
75static int di_show(struct seq_file *s, void *p)
76{
77 struct whc *whc = s->private;
78 int d;
79
80 for (d = 0; d < whc->n_devices; d++) {
81 struct di_buf_entry *di = &whc->di_buf[d];
82
83 seq_printf(s, "DI[%d]\n", d);
84 seq_printf(s, " availability: %*pb\n",
85 UWB_NUM_MAS, (unsigned long *)di->availability_info);
86 seq_printf(s, " %c%c key idx: %d dev addr: %d\n",
87 (di->addr_sec_info & WHC_DI_SECURE) ? 'S' : ' ',
88 (di->addr_sec_info & WHC_DI_DISABLE) ? 'D' : ' ',
89 (di->addr_sec_info & WHC_DI_KEY_IDX_MASK) >> 8,
90 (di->addr_sec_info & WHC_DI_DEV_ADDR_MASK));
91 }
92 return 0;
93}
94DEFINE_SHOW_ATTRIBUTE(di);
95
96static int asl_show(struct seq_file *s, void *p)
97{
98 struct whc *whc = s->private;
99 struct whc_qset *qset;
100
101 list_for_each_entry(qset, &whc->async_list, list_node) {
102 qset_print(s, qset);
103 }
104
105 return 0;
106}
107DEFINE_SHOW_ATTRIBUTE(asl);
108
109static int pzl_show(struct seq_file *s, void *p)
110{
111 struct whc *whc = s->private;
112 struct whc_qset *qset;
113 int period;
114
115 for (period = 0; period < 5; period++) {
116 seq_printf(s, "Period %d\n", period);
117 list_for_each_entry(qset, &whc->periodic_list[period], list_node) {
118 qset_print(s, qset);
119 }
120 }
121 return 0;
122}
123DEFINE_SHOW_ATTRIBUTE(pzl);
124
125void whc_dbg_init(struct whc *whc)
126{
127 if (whc->wusbhc.pal.debugfs_dir == NULL)
128 return;
129
130 whc->dbg = kzalloc(sizeof(struct whc_dbg), GFP_KERNEL);
131 if (whc->dbg == NULL)
132 return;
133
134 whc->dbg->di_f = debugfs_create_file("di", 0444,
135 whc->wusbhc.pal.debugfs_dir, whc,
136 &di_fops);
137 whc->dbg->asl_f = debugfs_create_file("asl", 0444,
138 whc->wusbhc.pal.debugfs_dir, whc,
139 &asl_fops);
140 whc->dbg->pzl_f = debugfs_create_file("pzl", 0444,
141 whc->wusbhc.pal.debugfs_dir, whc,
142 &pzl_fops);
143}
144
145void whc_dbg_clean_up(struct whc *whc)
146{
147 if (whc->dbg) {
148 debugfs_remove(whc->dbg->pzl_f);
149 debugfs_remove(whc->dbg->asl_f);
150 debugfs_remove(whc->dbg->di_f);
151 kfree(whc->dbg);
152 }
153}