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779e6e1c JG |
1 | /* |
2 | * drivers/s390/cio/qdio_debug.c | |
3 | * | |
3f09bb89 | 4 | * Copyright IBM Corp. 2008,2009 |
779e6e1c JG |
5 | * |
6 | * Author: Jan Glauber (jang@linux.vnet.ibm.com) | |
7 | */ | |
779e6e1c JG |
8 | #include <linux/seq_file.h> |
9 | #include <linux/debugfs.h> | |
779e6e1c JG |
10 | #include <asm/debug.h> |
11 | #include "qdio_debug.h" | |
12 | #include "qdio.h" | |
13 | ||
14 | debug_info_t *qdio_dbf_setup; | |
22f99347 | 15 | debug_info_t *qdio_dbf_error; |
779e6e1c JG |
16 | |
17 | static struct dentry *debugfs_root; | |
3f09bb89 | 18 | #define QDIO_DEBUGFS_NAME_LEN 10 |
779e6e1c | 19 | |
22f99347 JG |
20 | void qdio_allocate_dbf(struct qdio_initialize *init_data, |
21 | struct qdio_irq *irq_ptr) | |
779e6e1c | 22 | { |
22f99347 JG |
23 | char text[20]; |
24 | ||
25 | DBF_EVENT("qfmt:%1d", init_data->q_format); | |
26 | DBF_HEX(init_data->adapter_name, 8); | |
27 | DBF_EVENT("qpff%4x", init_data->qib_param_field_format); | |
28 | DBF_HEX(&init_data->qib_param_field, sizeof(void *)); | |
29 | DBF_HEX(&init_data->input_slib_elements, sizeof(void *)); | |
30 | DBF_HEX(&init_data->output_slib_elements, sizeof(void *)); | |
31 | DBF_EVENT("niq:%1d noq:%1d", init_data->no_input_qs, | |
32 | init_data->no_output_qs); | |
33 | DBF_HEX(&init_data->input_handler, sizeof(void *)); | |
34 | DBF_HEX(&init_data->output_handler, sizeof(void *)); | |
35 | DBF_HEX(&init_data->int_parm, sizeof(long)); | |
36 | DBF_HEX(&init_data->flags, sizeof(long)); | |
37 | DBF_HEX(&init_data->input_sbal_addr_array, sizeof(void *)); | |
38 | DBF_HEX(&init_data->output_sbal_addr_array, sizeof(void *)); | |
39 | DBF_EVENT("irq:%8lx", (unsigned long)irq_ptr); | |
40 | ||
41 | /* allocate trace view for the interface */ | |
42 | snprintf(text, 20, "qdio_%s", dev_name(&init_data->cdev->dev)); | |
43 | irq_ptr->debug_area = debug_register(text, 2, 1, 16); | |
44 | debug_register_view(irq_ptr->debug_area, &debug_hex_ascii_view); | |
45 | debug_set_level(irq_ptr->debug_area, DBF_WARN); | |
46 | DBF_DEV_EVENT(DBF_ERR, irq_ptr, "dbf created"); | |
779e6e1c JG |
47 | } |
48 | ||
49 | static int qstat_show(struct seq_file *m, void *v) | |
50 | { | |
51 | unsigned char state; | |
52 | struct qdio_q *q = m->private; | |
53 | int i; | |
54 | ||
55 | if (!q) | |
56 | return 0; | |
57 | ||
6486cda6 JG |
58 | seq_printf(m, "DSCI: %d nr_used: %d\n", |
59 | *(u32 *)q->irq_ptr->dsci, atomic_read(&q->nr_buf_used)); | |
60 | seq_printf(m, "ftc: %d last_move: %d\n", q->first_to_check, q->last_move); | |
61 | seq_printf(m, "polling: %d ack start: %d ack count: %d\n", | |
62 | q->u.in.polling, q->u.in.ack_start, q->u.in.ack_count); | |
779e6e1c | 63 | seq_printf(m, "slsb buffer states:\n"); |
50f769df | 64 | seq_printf(m, "|0 |8 |16 |24 |32 |40 |48 |56 63|\n"); |
779e6e1c | 65 | |
779e6e1c | 66 | for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; i++) { |
60b5df2f | 67 | debug_get_buf_state(q, i, &state); |
779e6e1c JG |
68 | switch (state) { |
69 | case SLSB_P_INPUT_NOT_INIT: | |
70 | case SLSB_P_OUTPUT_NOT_INIT: | |
71 | seq_printf(m, "N"); | |
72 | break; | |
73 | case SLSB_P_INPUT_PRIMED: | |
74 | case SLSB_CU_OUTPUT_PRIMED: | |
75 | seq_printf(m, "+"); | |
76 | break; | |
77 | case SLSB_P_INPUT_ACK: | |
78 | seq_printf(m, "A"); | |
79 | break; | |
80 | case SLSB_P_INPUT_ERROR: | |
81 | case SLSB_P_OUTPUT_ERROR: | |
82 | seq_printf(m, "x"); | |
83 | break; | |
84 | case SLSB_CU_INPUT_EMPTY: | |
85 | case SLSB_P_OUTPUT_EMPTY: | |
86 | seq_printf(m, "-"); | |
87 | break; | |
88 | case SLSB_P_INPUT_HALTED: | |
89 | case SLSB_P_OUTPUT_HALTED: | |
90 | seq_printf(m, "."); | |
91 | break; | |
92 | default: | |
93 | seq_printf(m, "?"); | |
94 | } | |
95 | if (i == 63) | |
96 | seq_printf(m, "\n"); | |
97 | } | |
98 | seq_printf(m, "\n"); | |
50f769df | 99 | seq_printf(m, "|64 |72 |80 |88 |96 |104 |112 | 127|\n"); |
779e6e1c JG |
100 | return 0; |
101 | } | |
102 | ||
103 | static ssize_t qstat_seq_write(struct file *file, const char __user *buf, | |
104 | size_t count, loff_t *off) | |
105 | { | |
106 | struct seq_file *seq = file->private_data; | |
107 | struct qdio_q *q = seq->private; | |
108 | ||
109 | if (!q) | |
110 | return 0; | |
779e6e1c JG |
111 | if (q->is_input_q) |
112 | xchg(q->irq_ptr->dsci, 1); | |
113 | local_bh_disable(); | |
114 | tasklet_schedule(&q->tasklet); | |
115 | local_bh_enable(); | |
116 | return count; | |
117 | } | |
118 | ||
119 | static int qstat_seq_open(struct inode *inode, struct file *filp) | |
120 | { | |
121 | return single_open(filp, qstat_show, | |
122 | filp->f_path.dentry->d_inode->i_private); | |
123 | } | |
124 | ||
828c0950 | 125 | static const struct file_operations debugfs_fops = { |
779e6e1c JG |
126 | .owner = THIS_MODULE, |
127 | .open = qstat_seq_open, | |
128 | .read = seq_read, | |
129 | .write = qstat_seq_write, | |
130 | .llseek = seq_lseek, | |
131 | .release = single_release, | |
132 | }; | |
133 | ||
6486cda6 JG |
134 | static char *qperf_names[] = { |
135 | "Assumed adapter interrupts", | |
136 | "QDIO interrupts", | |
137 | "Requested PCIs", | |
138 | "Inbound tasklet runs", | |
139 | "Inbound tasklet resched", | |
140 | "Inbound tasklet resched2", | |
141 | "Outbound tasklet runs", | |
142 | "SIGA read", | |
143 | "SIGA write", | |
144 | "SIGA sync", | |
145 | "Inbound calls", | |
146 | "Inbound handler", | |
147 | "Inbound stop_polling", | |
148 | "Inbound queue full", | |
149 | "Outbound calls", | |
150 | "Outbound handler", | |
151 | "Outbound fast_requeue", | |
152 | "Outbound target_full", | |
153 | "QEBSM eqbs", | |
154 | "QEBSM eqbs partial", | |
155 | "QEBSM sqbs", | |
156 | "QEBSM sqbs partial" | |
157 | }; | |
158 | ||
159 | static int qperf_show(struct seq_file *m, void *v) | |
160 | { | |
161 | struct qdio_irq *irq_ptr = m->private; | |
162 | unsigned int *stat; | |
163 | int i; | |
164 | ||
165 | if (!irq_ptr) | |
166 | return 0; | |
167 | if (!irq_ptr->perf_stat_enabled) { | |
168 | seq_printf(m, "disabled\n"); | |
169 | return 0; | |
170 | } | |
171 | stat = (unsigned int *)&irq_ptr->perf_stat; | |
172 | ||
173 | for (i = 0; i < ARRAY_SIZE(qperf_names); i++) | |
174 | seq_printf(m, "%26s:\t%u\n", | |
175 | qperf_names[i], *(stat + i)); | |
176 | return 0; | |
177 | } | |
178 | ||
179 | static ssize_t qperf_seq_write(struct file *file, const char __user *ubuf, | |
180 | size_t count, loff_t *off) | |
181 | { | |
182 | struct seq_file *seq = file->private_data; | |
183 | struct qdio_irq *irq_ptr = seq->private; | |
184 | unsigned long val; | |
185 | char buf[8]; | |
186 | int ret; | |
187 | ||
188 | if (!irq_ptr) | |
189 | return 0; | |
190 | if (count >= sizeof(buf)) | |
191 | return -EINVAL; | |
192 | if (copy_from_user(&buf, ubuf, count)) | |
193 | return -EFAULT; | |
194 | buf[count] = 0; | |
195 | ||
196 | ret = strict_strtoul(buf, 10, &val); | |
197 | if (ret < 0) | |
198 | return ret; | |
199 | ||
200 | switch (val) { | |
201 | case 0: | |
202 | irq_ptr->perf_stat_enabled = 0; | |
203 | memset(&irq_ptr->perf_stat, 0, sizeof(irq_ptr->perf_stat)); | |
204 | break; | |
205 | case 1: | |
206 | irq_ptr->perf_stat_enabled = 1; | |
207 | break; | |
208 | } | |
209 | return count; | |
210 | } | |
211 | ||
212 | static int qperf_seq_open(struct inode *inode, struct file *filp) | |
213 | { | |
214 | return single_open(filp, qperf_show, | |
215 | filp->f_path.dentry->d_inode->i_private); | |
216 | } | |
217 | ||
218 | static struct file_operations debugfs_perf_fops = { | |
219 | .owner = THIS_MODULE, | |
220 | .open = qperf_seq_open, | |
221 | .read = seq_read, | |
222 | .write = qperf_seq_write, | |
223 | .llseek = seq_lseek, | |
224 | .release = single_release, | |
225 | }; | |
779e6e1c JG |
226 | static void setup_debugfs_entry(struct qdio_q *q, struct ccw_device *cdev) |
227 | { | |
2c780914 | 228 | char name[QDIO_DEBUGFS_NAME_LEN]; |
779e6e1c | 229 | |
3f09bb89 | 230 | snprintf(name, QDIO_DEBUGFS_NAME_LEN, "%s_%d", |
2c780914 JG |
231 | q->is_input_q ? "input" : "output", |
232 | q->nr); | |
3f09bb89 JG |
233 | q->debugfs_q = debugfs_create_file(name, S_IFREG | S_IRUGO | S_IWUSR, |
234 | q->irq_ptr->debugfs_dev, q, &debugfs_fops); | |
235 | if (IS_ERR(q->debugfs_q)) | |
236 | q->debugfs_q = NULL; | |
779e6e1c JG |
237 | } |
238 | ||
239 | void qdio_setup_debug_entries(struct qdio_irq *irq_ptr, struct ccw_device *cdev) | |
240 | { | |
241 | struct qdio_q *q; | |
242 | int i; | |
243 | ||
3f09bb89 JG |
244 | irq_ptr->debugfs_dev = debugfs_create_dir(dev_name(&cdev->dev), |
245 | debugfs_root); | |
246 | if (IS_ERR(irq_ptr->debugfs_dev)) | |
247 | irq_ptr->debugfs_dev = NULL; | |
6486cda6 JG |
248 | |
249 | irq_ptr->debugfs_perf = debugfs_create_file("statistics", | |
250 | S_IFREG | S_IRUGO | S_IWUSR, | |
251 | irq_ptr->debugfs_dev, irq_ptr, | |
252 | &debugfs_perf_fops); | |
253 | if (IS_ERR(irq_ptr->debugfs_perf)) | |
254 | irq_ptr->debugfs_perf = NULL; | |
255 | ||
779e6e1c JG |
256 | for_each_input_queue(irq_ptr, q, i) |
257 | setup_debugfs_entry(q, cdev); | |
258 | for_each_output_queue(irq_ptr, q, i) | |
259 | setup_debugfs_entry(q, cdev); | |
779e6e1c JG |
260 | } |
261 | ||
262 | void qdio_shutdown_debug_entries(struct qdio_irq *irq_ptr, struct ccw_device *cdev) | |
263 | { | |
264 | struct qdio_q *q; | |
265 | int i; | |
266 | ||
779e6e1c | 267 | for_each_input_queue(irq_ptr, q, i) |
3f09bb89 | 268 | debugfs_remove(q->debugfs_q); |
779e6e1c | 269 | for_each_output_queue(irq_ptr, q, i) |
3f09bb89 | 270 | debugfs_remove(q->debugfs_q); |
6486cda6 | 271 | debugfs_remove(irq_ptr->debugfs_perf); |
3f09bb89 | 272 | debugfs_remove(irq_ptr->debugfs_dev); |
779e6e1c JG |
273 | } |
274 | ||
275 | int __init qdio_debug_init(void) | |
276 | { | |
3f09bb89 | 277 | debugfs_root = debugfs_create_dir("qdio", NULL); |
22f99347 JG |
278 | |
279 | qdio_dbf_setup = debug_register("qdio_setup", 16, 1, 16); | |
280 | debug_register_view(qdio_dbf_setup, &debug_hex_ascii_view); | |
281 | debug_set_level(qdio_dbf_setup, DBF_INFO); | |
282 | DBF_EVENT("dbf created\n"); | |
283 | ||
284 | qdio_dbf_error = debug_register("qdio_error", 4, 1, 16); | |
285 | debug_register_view(qdio_dbf_error, &debug_hex_ascii_view); | |
286 | debug_set_level(qdio_dbf_error, DBF_INFO); | |
287 | DBF_ERROR("dbf created\n"); | |
288 | return 0; | |
779e6e1c JG |
289 | } |
290 | ||
291 | void qdio_debug_exit(void) | |
292 | { | |
293 | debugfs_remove(debugfs_root); | |
22f99347 JG |
294 | if (qdio_dbf_setup) |
295 | debug_unregister(qdio_dbf_setup); | |
296 | if (qdio_dbf_error) | |
297 | debug_unregister(qdio_dbf_error); | |
779e6e1c | 298 | } |