2 * drivers/s390/cio/qdio_debug.c
4 * Copyright IBM Corp. 2008,2009
6 * Author: Jan Glauber (jang@linux.vnet.ibm.com)
8 #include <linux/seq_file.h>
9 #include <linux/debugfs.h>
10 #include <linux/uaccess.h>
11 #include <linux/export.h>
12 #include <asm/debug.h>
13 #include "qdio_debug.h"
16 debug_info_t
*qdio_dbf_setup
;
17 debug_info_t
*qdio_dbf_error
;
19 static struct dentry
*debugfs_root
;
20 #define QDIO_DEBUGFS_NAME_LEN 10
22 void qdio_allocate_dbf(struct qdio_initialize
*init_data
,
23 struct qdio_irq
*irq_ptr
)
27 DBF_EVENT("qfmt:%1d", init_data
->q_format
);
28 DBF_HEX(init_data
->adapter_name
, 8);
29 DBF_EVENT("qpff%4x", init_data
->qib_param_field_format
);
30 DBF_HEX(&init_data
->qib_param_field
, sizeof(void *));
31 DBF_HEX(&init_data
->input_slib_elements
, sizeof(void *));
32 DBF_HEX(&init_data
->output_slib_elements
, sizeof(void *));
33 DBF_EVENT("niq:%1d noq:%1d", init_data
->no_input_qs
,
34 init_data
->no_output_qs
);
35 DBF_HEX(&init_data
->input_handler
, sizeof(void *));
36 DBF_HEX(&init_data
->output_handler
, sizeof(void *));
37 DBF_HEX(&init_data
->int_parm
, sizeof(long));
38 DBF_HEX(&init_data
->input_sbal_addr_array
, sizeof(void *));
39 DBF_HEX(&init_data
->output_sbal_addr_array
, sizeof(void *));
40 DBF_EVENT("irq:%8lx", (unsigned long)irq_ptr
);
42 /* allocate trace view for the interface */
43 snprintf(text
, 20, "qdio_%s", dev_name(&init_data
->cdev
->dev
));
44 irq_ptr
->debug_area
= debug_register(text
, 2, 1, 16);
45 debug_register_view(irq_ptr
->debug_area
, &debug_hex_ascii_view
);
46 debug_set_level(irq_ptr
->debug_area
, DBF_WARN
);
47 DBF_DEV_EVENT(DBF_ERR
, irq_ptr
, "dbf created");
50 static int qstat_show(struct seq_file
*m
, void *v
)
53 struct qdio_q
*q
= m
->private;
59 seq_printf(m
, "DSCI: %d nr_used: %d\n",
60 *(u32
*)q
->irq_ptr
->dsci
, atomic_read(&q
->nr_buf_used
));
61 seq_printf(m
, "ftc: %d last_move: %d\n",
62 q
->first_to_check
, q
->last_move
);
64 seq_printf(m
, "polling: %d ack start: %d ack count: %d\n",
65 q
->u
.in
.polling
, q
->u
.in
.ack_start
,
67 seq_printf(m
, "IRQs disabled: %u\n",
68 test_bit(QDIO_QUEUE_IRQS_DISABLED
,
69 &q
->u
.in
.queue_irq_state
));
71 seq_printf(m
, "SBAL states:\n");
72 seq_printf(m
, "|0 |8 |16 |24 |32 |40 |48 |56 63|\n");
74 for (i
= 0; i
< QDIO_MAX_BUFFERS_PER_Q
; i
++) {
75 debug_get_buf_state(q
, i
, &state
);
77 case SLSB_P_INPUT_NOT_INIT
:
78 case SLSB_P_OUTPUT_NOT_INIT
:
81 case SLSB_P_OUTPUT_PENDING
:
84 case SLSB_P_INPUT_PRIMED
:
85 case SLSB_CU_OUTPUT_PRIMED
:
88 case SLSB_P_INPUT_ACK
:
91 case SLSB_P_INPUT_ERROR
:
92 case SLSB_P_OUTPUT_ERROR
:
95 case SLSB_CU_INPUT_EMPTY
:
96 case SLSB_P_OUTPUT_EMPTY
:
99 case SLSB_P_INPUT_HALTED
:
100 case SLSB_P_OUTPUT_HALTED
:
110 seq_printf(m
, "|64 |72 |80 |88 |96 |104 |112 | 127|\n");
112 seq_printf(m
, "\nSBAL statistics:");
113 if (!q
->irq_ptr
->perf_stat_enabled
) {
114 seq_printf(m
, " disabled\n");
118 seq_printf(m
, "\n1 2.. 4.. 8.. "
119 "16.. 32.. 64.. 127\n");
120 for (i
= 0; i
< ARRAY_SIZE(q
->q_stats
.nr_sbals
); i
++)
121 seq_printf(m
, "%-10u ", q
->q_stats
.nr_sbals
[i
]);
122 seq_printf(m
, "\nError NOP Total\n%-10u %-10u %-10u\n\n",
123 q
->q_stats
.nr_sbal_error
, q
->q_stats
.nr_sbal_nop
,
124 q
->q_stats
.nr_sbal_total
);
128 static int qstat_seq_open(struct inode
*inode
, struct file
*filp
)
130 return single_open(filp
, qstat_show
,
131 filp
->f_path
.dentry
->d_inode
->i_private
);
134 static const struct file_operations debugfs_fops
= {
135 .owner
= THIS_MODULE
,
136 .open
= qstat_seq_open
,
139 .release
= single_release
,
142 static char *qperf_names
[] = {
143 "Assumed adapter interrupts",
146 "Inbound tasklet runs",
147 "Inbound tasklet resched",
148 "Inbound tasklet resched2",
149 "Outbound tasklet runs",
155 "Inbound stop_polling",
156 "Inbound queue full",
159 "Outbound queue full",
160 "Outbound fast_requeue",
161 "Outbound target_full",
163 "QEBSM eqbs partial",
165 "QEBSM sqbs partial",
166 "Discarded interrupts"
169 static int qperf_show(struct seq_file
*m
, void *v
)
171 struct qdio_irq
*irq_ptr
= m
->private;
177 if (!irq_ptr
->perf_stat_enabled
) {
178 seq_printf(m
, "disabled\n");
181 stat
= (unsigned int *)&irq_ptr
->perf_stat
;
183 for (i
= 0; i
< ARRAY_SIZE(qperf_names
); i
++)
184 seq_printf(m
, "%26s:\t%u\n",
185 qperf_names
[i
], *(stat
+ i
));
189 static ssize_t
qperf_seq_write(struct file
*file
, const char __user
*ubuf
,
190 size_t count
, loff_t
*off
)
192 struct seq_file
*seq
= file
->private_data
;
193 struct qdio_irq
*irq_ptr
= seq
->private;
201 ret
= kstrtoul_from_user(ubuf
, count
, 10, &val
);
207 irq_ptr
->perf_stat_enabled
= 0;
208 memset(&irq_ptr
->perf_stat
, 0, sizeof(irq_ptr
->perf_stat
));
209 for_each_input_queue(irq_ptr
, q
, i
)
210 memset(&q
->q_stats
, 0, sizeof(q
->q_stats
));
211 for_each_output_queue(irq_ptr
, q
, i
)
212 memset(&q
->q_stats
, 0, sizeof(q
->q_stats
));
215 irq_ptr
->perf_stat_enabled
= 1;
221 static int qperf_seq_open(struct inode
*inode
, struct file
*filp
)
223 return single_open(filp
, qperf_show
,
224 filp
->f_path
.dentry
->d_inode
->i_private
);
227 static struct file_operations debugfs_perf_fops
= {
228 .owner
= THIS_MODULE
,
229 .open
= qperf_seq_open
,
231 .write
= qperf_seq_write
,
233 .release
= single_release
,
235 static void setup_debugfs_entry(struct qdio_q
*q
, struct ccw_device
*cdev
)
237 char name
[QDIO_DEBUGFS_NAME_LEN
];
239 snprintf(name
, QDIO_DEBUGFS_NAME_LEN
, "%s_%d",
240 q
->is_input_q
? "input" : "output",
242 q
->debugfs_q
= debugfs_create_file(name
, S_IFREG
| S_IRUGO
| S_IWUSR
,
243 q
->irq_ptr
->debugfs_dev
, q
, &debugfs_fops
);
244 if (IS_ERR(q
->debugfs_q
))
248 void qdio_setup_debug_entries(struct qdio_irq
*irq_ptr
, struct ccw_device
*cdev
)
253 irq_ptr
->debugfs_dev
= debugfs_create_dir(dev_name(&cdev
->dev
),
255 if (IS_ERR(irq_ptr
->debugfs_dev
))
256 irq_ptr
->debugfs_dev
= NULL
;
258 irq_ptr
->debugfs_perf
= debugfs_create_file("statistics",
259 S_IFREG
| S_IRUGO
| S_IWUSR
,
260 irq_ptr
->debugfs_dev
, irq_ptr
,
262 if (IS_ERR(irq_ptr
->debugfs_perf
))
263 irq_ptr
->debugfs_perf
= NULL
;
265 for_each_input_queue(irq_ptr
, q
, i
)
266 setup_debugfs_entry(q
, cdev
);
267 for_each_output_queue(irq_ptr
, q
, i
)
268 setup_debugfs_entry(q
, cdev
);
271 void qdio_shutdown_debug_entries(struct qdio_irq
*irq_ptr
, struct ccw_device
*cdev
)
276 for_each_input_queue(irq_ptr
, q
, i
)
277 debugfs_remove(q
->debugfs_q
);
278 for_each_output_queue(irq_ptr
, q
, i
)
279 debugfs_remove(q
->debugfs_q
);
280 debugfs_remove(irq_ptr
->debugfs_perf
);
281 debugfs_remove(irq_ptr
->debugfs_dev
);
284 int __init
qdio_debug_init(void)
286 debugfs_root
= debugfs_create_dir("qdio", NULL
);
288 qdio_dbf_setup
= debug_register("qdio_setup", 16, 1, 16);
289 debug_register_view(qdio_dbf_setup
, &debug_hex_ascii_view
);
290 debug_set_level(qdio_dbf_setup
, DBF_INFO
);
291 DBF_EVENT("dbf created\n");
293 qdio_dbf_error
= debug_register("qdio_error", 4, 1, 16);
294 debug_register_view(qdio_dbf_error
, &debug_hex_ascii_view
);
295 debug_set_level(qdio_dbf_error
, DBF_INFO
);
296 DBF_ERROR("dbf created\n");
300 void qdio_debug_exit(void)
302 debugfs_remove(debugfs_root
);
304 debug_unregister(qdio_dbf_setup
);
306 debug_unregister(qdio_dbf_error
);