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df613b96 AV |
1 | /* |
2 | * QLogic Fibre Channel HBA Driver | |
bd21eaf9 | 3 | * Copyright (c) 2003-2014 QLogic Corporation |
df613b96 AV |
4 | * |
5 | * See LICENSE.qla2xxx for copyright and licensing details. | |
6 | */ | |
7 | #include "qla_def.h" | |
8 | ||
9 | #include <linux/debugfs.h> | |
10 | #include <linux/seq_file.h> | |
11 | ||
12 | static struct dentry *qla2x00_dfs_root; | |
13 | static atomic_t qla2x00_dfs_root_count; | |
14 | ||
15 | static int | |
16 | qla2x00_dfs_fce_show(struct seq_file *s, void *unused) | |
17 | { | |
7b867cf7 | 18 | scsi_qla_host_t *vha = s->private; |
df613b96 AV |
19 | uint32_t cnt; |
20 | uint32_t *fce; | |
21 | uint64_t fce_start; | |
7b867cf7 | 22 | struct qla_hw_data *ha = vha->hw; |
df613b96 AV |
23 | |
24 | mutex_lock(&ha->fce_mutex); | |
25 | ||
91c40f24 | 26 | seq_puts(s, "FCE Trace Buffer\n"); |
279e7f54 | 27 | seq_printf(s, "In Pointer = %llx\n\n", (unsigned long long)ha->fce_wr); |
df613b96 | 28 | seq_printf(s, "Base = %llx\n\n", (unsigned long long) ha->fce_dma); |
91c40f24 | 29 | seq_puts(s, "FCE Enable Registers\n"); |
df613b96 AV |
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 | |
91c40f24 | 41 | seq_puts(s, " "); |
df613b96 AV |
42 | seq_printf(s, "%08x", *fce++); |
43 | } | |
44 | ||
91c40f24 | 45 | seq_puts(s, "\nEnd\n"); |
df613b96 AV |
46 | |
47 | mutex_unlock(&ha->fce_mutex); | |
48 | ||
49 | return 0; | |
50 | } | |
51 | ||
52 | static int | |
53 | qla2x00_dfs_fce_open(struct inode *inode, struct file *file) | |
54 | { | |
7b867cf7 AC |
55 | scsi_qla_host_t *vha = inode->i_private; |
56 | struct qla_hw_data *ha = vha->hw; | |
df613b96 AV |
57 | int rval; |
58 | ||
59 | if (!ha->flags.fce_enabled) | |
60 | goto out; | |
61 | ||
62 | mutex_lock(&ha->fce_mutex); | |
63 | ||
64 | /* Pause tracing to flush FCE buffers. */ | |
7b867cf7 | 65 | rval = qla2x00_disable_fce_trace(vha, &ha->fce_wr, &ha->fce_rd); |
df613b96 | 66 | if (rval) |
7c3df132 | 67 | ql_dbg(ql_dbg_user, vha, 0x705c, |
df613b96 AV |
68 | "DebugFS: Unable to disable FCE (%d).\n", rval); |
69 | ||
70 | ha->flags.fce_enabled = 0; | |
71 | ||
72 | mutex_unlock(&ha->fce_mutex); | |
73 | out: | |
94279ede | 74 | return single_open(file, qla2x00_dfs_fce_show, vha); |
df613b96 AV |
75 | } |
76 | ||
77 | static int | |
78 | qla2x00_dfs_fce_release(struct inode *inode, struct file *file) | |
79 | { | |
7b867cf7 AC |
80 | scsi_qla_host_t *vha = inode->i_private; |
81 | struct qla_hw_data *ha = vha->hw; | |
df613b96 AV |
82 | int rval; |
83 | ||
84 | if (ha->flags.fce_enabled) | |
85 | goto out; | |
86 | ||
87 | mutex_lock(&ha->fce_mutex); | |
88 | ||
89 | /* Re-enable FCE tracing. */ | |
90 | ha->flags.fce_enabled = 1; | |
91 | memset(ha->fce, 0, fce_calc_size(ha->fce_bufs)); | |
7b867cf7 | 92 | rval = qla2x00_enable_fce_trace(vha, ha->fce_dma, ha->fce_bufs, |
df613b96 AV |
93 | ha->fce_mb, &ha->fce_bufs); |
94 | if (rval) { | |
7c3df132 | 95 | ql_dbg(ql_dbg_user, vha, 0x700d, |
df613b96 AV |
96 | "DebugFS: Unable to reinitialize FCE (%d).\n", rval); |
97 | ha->flags.fce_enabled = 0; | |
98 | } | |
99 | ||
100 | mutex_unlock(&ha->fce_mutex); | |
101 | out: | |
102 | return single_release(inode, file); | |
103 | } | |
104 | ||
105 | static 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 | ||
112 | int | |
7b867cf7 | 113 | qla2x00_dfs_setup(scsi_qla_host_t *vha) |
df613b96 | 114 | { |
7b867cf7 | 115 | struct qla_hw_data *ha = vha->hw; |
3a03eb79 | 116 | |
f73cb695 CD |
117 | if (!IS_QLA25XX(ha) && !IS_QLA81XX(ha) && !IS_QLA83XX(ha) && |
118 | !IS_QLA27XX(ha)) | |
df613b96 AV |
119 | goto out; |
120 | if (!ha->fce) | |
121 | goto out; | |
122 | ||
123 | if (qla2x00_dfs_root) | |
124 | goto create_dir; | |
125 | ||
126 | atomic_set(&qla2x00_dfs_root_count, 0); | |
127 | qla2x00_dfs_root = debugfs_create_dir(QLA2XXX_DRIVER_NAME, NULL); | |
128 | if (!qla2x00_dfs_root) { | |
7c3df132 SK |
129 | ql_log(ql_log_warn, vha, 0x00f7, |
130 | "Unable to create debugfs root directory.\n"); | |
df613b96 AV |
131 | goto out; |
132 | } | |
133 | ||
134 | create_dir: | |
135 | if (ha->dfs_dir) | |
136 | goto create_nodes; | |
137 | ||
138 | mutex_init(&ha->fce_mutex); | |
7b867cf7 | 139 | ha->dfs_dir = debugfs_create_dir(vha->host_str, qla2x00_dfs_root); |
df613b96 | 140 | if (!ha->dfs_dir) { |
7c3df132 SK |
141 | ql_log(ql_log_warn, vha, 0x00f8, |
142 | "Unable to create debugfs ha directory.\n"); | |
df613b96 AV |
143 | goto out; |
144 | } | |
145 | ||
146 | atomic_inc(&qla2x00_dfs_root_count); | |
147 | ||
148 | create_nodes: | |
94279ede | 149 | ha->dfs_fce = debugfs_create_file("fce", S_IRUSR, ha->dfs_dir, vha, |
df613b96 AV |
150 | &dfs_fce_ops); |
151 | if (!ha->dfs_fce) { | |
7c3df132 SK |
152 | ql_log(ql_log_warn, vha, 0x00f9, |
153 | "Unable to create debugfs fce node.\n"); | |
df613b96 AV |
154 | goto out; |
155 | } | |
156 | out: | |
157 | return 0; | |
158 | } | |
159 | ||
160 | int | |
7b867cf7 | 161 | qla2x00_dfs_remove(scsi_qla_host_t *vha) |
df613b96 | 162 | { |
7b867cf7 | 163 | struct qla_hw_data *ha = vha->hw; |
df613b96 AV |
164 | if (ha->dfs_fce) { |
165 | debugfs_remove(ha->dfs_fce); | |
166 | ha->dfs_fce = NULL; | |
167 | } | |
168 | ||
169 | if (ha->dfs_dir) { | |
170 | debugfs_remove(ha->dfs_dir); | |
171 | ha->dfs_dir = NULL; | |
172 | atomic_dec(&qla2x00_dfs_root_count); | |
173 | } | |
174 | ||
175 | if (atomic_read(&qla2x00_dfs_root_count) == 0 && | |
176 | qla2x00_dfs_root) { | |
177 | debugfs_remove(qla2x00_dfs_root); | |
178 | qla2x00_dfs_root = NULL; | |
179 | } | |
180 | ||
181 | return 0; | |
182 | } |