1
2
3
4
5
6
7#include "qla_def.h"
8
9#include <linux/debugfs.h>
10#include <linux/seq_file.h>
11
12static struct dentry *qla2x00_dfs_root;
13static atomic_t qla2x00_dfs_root_count;
14
15static int
16qla2x00_dfs_fce_show(struct seq_file *s, void *unused)
17{
18 scsi_qla_host_t *vha = s->private;
19 uint32_t cnt;
20 uint32_t *fce;
21 uint64_t fce_start;
22 struct qla_hw_data *ha = vha->hw;
23
24 mutex_lock(&ha->fce_mutex);
25
26 seq_printf(s, "FCE Trace Buffer\n");
27 seq_printf(s, "In Pointer = %llx\n\n", (unsigned long long)ha->fce_wr);
28 seq_printf(s, "Base = %llx\n\n", (unsigned long long) ha->fce_dma);
29 seq_printf(s, "FCE Enable Registers\n");
30 seq_printf(s, "%08x %08x %08x %08x %08x %08x\n",
31 ha->fce_mb[0], ha->fce_mb[2], ha->fce_mb[3], ha->fce_mb[4],
32 ha->fce_mb[5], ha->fce_mb[6]);
33
34 fce = (uint32_t *) ha->fce;
35 fce_start = (unsigned long long) ha->fce_dma;
36 for (cnt = 0; cnt < fce_calc_size(ha->fce_bufs) / 4; cnt++) {
37 if (cnt % 8 == 0)
38 seq_printf(s, "\n%llx: ",
39 (unsigned long long)((cnt * 4) + fce_start));
40 else
41 seq_printf(s, " ");
42 seq_printf(s, "%08x", *fce++);
43 }
44
45 seq_printf(s, "\nEnd\n");
46
47 mutex_unlock(&ha->fce_mutex);
48
49 return 0;
50}
51
52static int
53qla2x00_dfs_fce_open(struct inode *inode, struct file *file)
54{
55 scsi_qla_host_t *vha = inode->i_private;
56 struct qla_hw_data *ha = vha->hw;
57 int rval;
58
59 if (!ha->flags.fce_enabled)
60 goto out;
61
62 mutex_lock(&ha->fce_mutex);
63
64
65 rval = qla2x00_disable_fce_trace(vha, &ha->fce_wr, &ha->fce_rd);
66 if (rval)
67 qla_printk(KERN_WARNING, ha,
68 "DebugFS: Unable to disable FCE (%d).\n", rval);
69
70 ha->flags.fce_enabled = 0;
71
72 mutex_unlock(&ha->fce_mutex);
73out:
74 return single_open(file, qla2x00_dfs_fce_show, vha);
75}
76
77static int
78qla2x00_dfs_fce_release(struct inode *inode, struct file *file)
79{
80 scsi_qla_host_t *vha = inode->i_private;
81 struct qla_hw_data *ha = vha->hw;
82 int rval;
83
84 if (ha->flags.fce_enabled)
85 goto out;
86
87 mutex_lock(&ha->fce_mutex);
88
89
90 ha->flags.fce_enabled = 1;
91 memset(ha->fce, 0, fce_calc_size(ha->fce_bufs));
92 rval = qla2x00_enable_fce_trace(vha, ha->fce_dma, ha->fce_bufs,
93 ha->fce_mb, &ha->fce_bufs);
94 if (rval) {
95 qla_printk(KERN_WARNING, ha,
96 "DebugFS: Unable to reinitialize FCE (%d).\n", rval);
97 ha->flags.fce_enabled = 0;
98 }
99
100 mutex_unlock(&ha->fce_mutex);
101out:
102 return single_release(inode, file);
103}
104
105static const struct file_operations dfs_fce_ops = {
106 .open = qla2x00_dfs_fce_open,
107 .read = seq_read,
108 .llseek = seq_lseek,
109 .release = qla2x00_dfs_fce_release,
110};
111
112int
113qla2x00_dfs_setup(scsi_qla_host_t *vha)
114{
115 struct qla_hw_data *ha = vha->hw;
116
117 if (!IS_QLA25XX(ha) && !IS_QLA81XX(ha))
118 goto out;
119 if (!ha->fce)
120 goto out;
121
122 if (qla2x00_dfs_root)
123 goto create_dir;
124
125 atomic_set(&qla2x00_dfs_root_count, 0);
126 qla2x00_dfs_root = debugfs_create_dir(QLA2XXX_DRIVER_NAME, NULL);
127 if (!qla2x00_dfs_root) {
128 qla_printk(KERN_NOTICE, ha,
129 "DebugFS: Unable to create root directory.\n");
130 goto out;
131 }
132
133create_dir:
134 if (ha->dfs_dir)
135 goto create_nodes;
136
137 mutex_init(&ha->fce_mutex);
138 ha->dfs_dir = debugfs_create_dir(vha->host_str, qla2x00_dfs_root);
139 if (!ha->dfs_dir) {
140 qla_printk(KERN_NOTICE, ha,
141 "DebugFS: Unable to create ha directory.\n");
142 goto out;
143 }
144
145 atomic_inc(&qla2x00_dfs_root_count);
146
147create_nodes:
148 ha->dfs_fce = debugfs_create_file("fce", S_IRUSR, ha->dfs_dir, vha,
149 &dfs_fce_ops);
150 if (!ha->dfs_fce) {
151 qla_printk(KERN_NOTICE, ha,
152 "DebugFS: Unable to fce node.\n");
153 goto out;
154 }
155out:
156 return 0;
157}
158
159int
160qla2x00_dfs_remove(scsi_qla_host_t *vha)
161{
162 struct qla_hw_data *ha = vha->hw;
163 if (ha->dfs_fce) {
164 debugfs_remove(ha->dfs_fce);
165 ha->dfs_fce = NULL;
166 }
167
168 if (ha->dfs_dir) {
169 debugfs_remove(ha->dfs_dir);
170 ha->dfs_dir = NULL;
171 atomic_dec(&qla2x00_dfs_root_count);
172 }
173
174 if (atomic_read(&qla2x00_dfs_root_count) == 0 &&
175 qla2x00_dfs_root) {
176 debugfs_remove(qla2x00_dfs_root);
177 qla2x00_dfs_root = NULL;
178 }
179
180 return 0;
181}
182
