1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Copyright IBM Corp. 2008, 2009 4 * 5 * Author: Jan Glauber (jang@linux.vnet.ibm.com) 6 */ 7 #include <linux/seq_file.h> 8 #include <linux/debugfs.h> 9 #include <linux/uaccess.h> 10 #include <linux/export.h> 11 #include <linux/slab.h> 12 #include <asm/debug.h> 13 #include "qdio_debug.h" 14 #include "qdio.h" 15 16 debug_info_t *qdio_dbf_setup; 17 debug_info_t *qdio_dbf_error; 18 19 static struct dentry *debugfs_root; 20 #define QDIO_DEBUGFS_NAME_LEN 10 21 #define QDIO_DBF_NAME_LEN 20 22 23 struct qdio_dbf_entry { 24 char dbf_name[QDIO_DBF_NAME_LEN]; 25 debug_info_t *dbf_info; 26 struct list_head dbf_list; 27 }; 28 29 static LIST_HEAD(qdio_dbf_list); 30 static DEFINE_MUTEX(qdio_dbf_list_mutex); 31 32 static debug_info_t *qdio_get_dbf_entry(char *name) 33 { 34 struct qdio_dbf_entry *entry; 35 debug_info_t *rc = NULL; 36 37 mutex_lock(&qdio_dbf_list_mutex); 38 list_for_each_entry(entry, &qdio_dbf_list, dbf_list) { 39 if (strcmp(entry->dbf_name, name) == 0) { 40 rc = entry->dbf_info; 41 break; 42 } 43 } 44 mutex_unlock(&qdio_dbf_list_mutex); 45 return rc; 46 } 47 48 static void qdio_clear_dbf_list(void) 49 { 50 struct qdio_dbf_entry *entry, *tmp; 51 52 mutex_lock(&qdio_dbf_list_mutex); 53 list_for_each_entry_safe(entry, tmp, &qdio_dbf_list, dbf_list) { 54 list_del(&entry->dbf_list); 55 debug_unregister(entry->dbf_info); 56 kfree(entry); 57 } 58 mutex_unlock(&qdio_dbf_list_mutex); 59 } 60 61 int qdio_allocate_dbf(struct qdio_irq *irq_ptr) 62 { 63 char text[QDIO_DBF_NAME_LEN]; 64 struct qdio_dbf_entry *new_entry; 65 66 DBF_EVENT("irq:%8lx", (unsigned long)irq_ptr); 67 68 /* allocate trace view for the interface */ 69 snprintf(text, QDIO_DBF_NAME_LEN, "qdio_%s", 70 dev_name(&irq_ptr->cdev->dev)); 71 irq_ptr->debug_area = qdio_get_dbf_entry(text); 72 if (irq_ptr->debug_area) 73 DBF_DEV_EVENT(DBF_ERR, irq_ptr, "dbf reused"); 74 else { 75 irq_ptr->debug_area = debug_register(text, 2, 1, 16); 76 if (!irq_ptr->debug_area) 77 return -ENOMEM; 78 if (debug_register_view(irq_ptr->debug_area, 79 &debug_hex_ascii_view)) { 80 debug_unregister(irq_ptr->debug_area); 81 return -ENOMEM; 82 } 83 debug_set_level(irq_ptr->debug_area, DBF_WARN); 84 DBF_DEV_EVENT(DBF_ERR, irq_ptr, "dbf created"); 85 new_entry = kzalloc(sizeof(struct qdio_dbf_entry), GFP_KERNEL); 86 if (!new_entry) { 87 debug_unregister(irq_ptr->debug_area); 88 return -ENOMEM; 89 } 90 strlcpy(new_entry->dbf_name, text, QDIO_DBF_NAME_LEN); 91 new_entry->dbf_info = irq_ptr->debug_area; 92 mutex_lock(&qdio_dbf_list_mutex); 93 list_add(&new_entry->dbf_list, &qdio_dbf_list); 94 mutex_unlock(&qdio_dbf_list_mutex); 95 } 96 return 0; 97 } 98 99 static int qstat_show(struct seq_file *m, void *v) 100 { 101 unsigned char state; 102 struct qdio_q *q = m->private; 103 int i; 104 105 if (!q) 106 return 0; 107 108 seq_printf(m, "Timestamp: %Lx Last AI: %Lx\n", 109 q->timestamp, last_ai_time); 110 seq_printf(m, "nr_used: %d ftc: %d\n", 111 atomic_read(&q->nr_buf_used), q->first_to_check); 112 if (q->is_input_q) { 113 seq_printf(m, "batch start: %u batch count: %u\n", 114 q->u.in.batch_start, q->u.in.batch_count); 115 seq_printf(m, "DSCI: %x IRQs disabled: %u\n", 116 *(u8 *)q->irq_ptr->dsci, 117 test_bit(QDIO_IRQ_DISABLED, 118 &q->irq_ptr->poll_state)); 119 } 120 seq_printf(m, "SBAL states:\n"); 121 seq_printf(m, "|0 |8 |16 |24 |32 |40 |48 |56 63|\n"); 122 123 for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; i++) { 124 debug_get_buf_state(q, i, &state); 125 switch (state) { 126 case SLSB_P_INPUT_NOT_INIT: 127 case SLSB_P_OUTPUT_NOT_INIT: 128 seq_printf(m, "N"); 129 break; 130 case SLSB_P_OUTPUT_PENDING: 131 seq_printf(m, "P"); 132 break; 133 case SLSB_P_INPUT_PRIMED: 134 case SLSB_CU_OUTPUT_PRIMED: 135 seq_printf(m, "+"); 136 break; 137 case SLSB_P_INPUT_ACK: 138 seq_printf(m, "A"); 139 break; 140 case SLSB_P_INPUT_ERROR: 141 case SLSB_P_OUTPUT_ERROR: 142 seq_printf(m, "x"); 143 break; 144 case SLSB_CU_INPUT_EMPTY: 145 case SLSB_P_OUTPUT_EMPTY: 146 seq_printf(m, "-"); 147 break; 148 case SLSB_P_INPUT_HALTED: 149 case SLSB_P_OUTPUT_HALTED: 150 seq_printf(m, "."); 151 break; 152 default: 153 seq_printf(m, "?"); 154 } 155 if (i == 63) 156 seq_printf(m, "\n"); 157 } 158 seq_printf(m, "\n"); 159 seq_printf(m, "|64 |72 |80 |88 |96 |104 |112 | 127|\n"); 160 161 seq_printf(m, "\nSBAL statistics:"); 162 if (!q->irq_ptr->perf_stat_enabled) { 163 seq_printf(m, " disabled\n"); 164 return 0; 165 } 166 167 seq_printf(m, "\n1 2.. 4.. 8.. " 168 "16.. 32.. 64.. 127\n"); 169 for (i = 0; i < ARRAY_SIZE(q->q_stats.nr_sbals); i++) 170 seq_printf(m, "%-10u ", q->q_stats.nr_sbals[i]); 171 seq_printf(m, "\nError NOP Total\n%-10u %-10u %-10u\n\n", 172 q->q_stats.nr_sbal_error, q->q_stats.nr_sbal_nop, 173 q->q_stats.nr_sbal_total); 174 return 0; 175 } 176 177 DEFINE_SHOW_ATTRIBUTE(qstat); 178 179 static int ssqd_show(struct seq_file *m, void *v) 180 { 181 struct ccw_device *cdev = m->private; 182 struct qdio_ssqd_desc ssqd; 183 int rc; 184 185 rc = qdio_get_ssqd_desc(cdev, &ssqd); 186 if (rc) 187 return rc; 188 189 seq_hex_dump(m, "", DUMP_PREFIX_NONE, 16, 4, &ssqd, sizeof(ssqd), 190 false); 191 return 0; 192 } 193 194 DEFINE_SHOW_ATTRIBUTE(ssqd); 195 196 static char *qperf_names[] = { 197 "Assumed adapter interrupts", 198 "QDIO interrupts", 199 "Requested PCIs", 200 "Inbound tasklet runs", 201 "Inbound tasklet resched", 202 "Inbound tasklet resched2", 203 "Outbound tasklet runs", 204 "SIGA read", 205 "SIGA write", 206 "SIGA sync", 207 "Inbound calls", 208 "Inbound handler", 209 "Inbound stop_polling", 210 "Inbound queue full", 211 "Outbound calls", 212 "Outbound handler", 213 "Outbound queue full", 214 "Outbound fast_requeue", 215 "Outbound target_full", 216 "QEBSM eqbs", 217 "QEBSM eqbs partial", 218 "QEBSM sqbs", 219 "QEBSM sqbs partial", 220 "Discarded interrupts" 221 }; 222 223 static int qperf_show(struct seq_file *m, void *v) 224 { 225 struct qdio_irq *irq_ptr = m->private; 226 unsigned int *stat; 227 int i; 228 229 if (!irq_ptr) 230 return 0; 231 if (!irq_ptr->perf_stat_enabled) { 232 seq_printf(m, "disabled\n"); 233 return 0; 234 } 235 stat = (unsigned int *)&irq_ptr->perf_stat; 236 237 for (i = 0; i < ARRAY_SIZE(qperf_names); i++) 238 seq_printf(m, "%26s:\t%u\n", 239 qperf_names[i], *(stat + i)); 240 return 0; 241 } 242 243 static ssize_t qperf_seq_write(struct file *file, const char __user *ubuf, 244 size_t count, loff_t *off) 245 { 246 struct seq_file *seq = file->private_data; 247 struct qdio_irq *irq_ptr = seq->private; 248 struct qdio_q *q; 249 unsigned long val; 250 int ret, i; 251 252 if (!irq_ptr) 253 return 0; 254 255 ret = kstrtoul_from_user(ubuf, count, 10, &val); 256 if (ret) 257 return ret; 258 259 switch (val) { 260 case 0: 261 irq_ptr->perf_stat_enabled = 0; 262 memset(&irq_ptr->perf_stat, 0, sizeof(irq_ptr->perf_stat)); 263 for_each_input_queue(irq_ptr, q, i) 264 memset(&q->q_stats, 0, sizeof(q->q_stats)); 265 for_each_output_queue(irq_ptr, q, i) 266 memset(&q->q_stats, 0, sizeof(q->q_stats)); 267 break; 268 case 1: 269 irq_ptr->perf_stat_enabled = 1; 270 break; 271 } 272 return count; 273 } 274 275 static int qperf_seq_open(struct inode *inode, struct file *filp) 276 { 277 return single_open(filp, qperf_show, 278 file_inode(filp)->i_private); 279 } 280 281 static const struct file_operations debugfs_perf_fops = { 282 .owner = THIS_MODULE, 283 .open = qperf_seq_open, 284 .read = seq_read, 285 .write = qperf_seq_write, 286 .llseek = seq_lseek, 287 .release = single_release, 288 }; 289 290 static void setup_debugfs_entry(struct dentry *parent, struct qdio_q *q) 291 { 292 char name[QDIO_DEBUGFS_NAME_LEN]; 293 294 snprintf(name, QDIO_DEBUGFS_NAME_LEN, "%s_%d", 295 q->is_input_q ? "input" : "output", 296 q->nr); 297 debugfs_create_file(name, 0444, parent, q, &qstat_fops); 298 } 299 300 void qdio_setup_debug_entries(struct qdio_irq *irq_ptr) 301 { 302 struct qdio_q *q; 303 int i; 304 305 irq_ptr->debugfs_dev = debugfs_create_dir(dev_name(&irq_ptr->cdev->dev), 306 debugfs_root); 307 debugfs_create_file("statistics", S_IFREG | S_IRUGO | S_IWUSR, 308 irq_ptr->debugfs_dev, irq_ptr, &debugfs_perf_fops); 309 debugfs_create_file("ssqd", 0444, irq_ptr->debugfs_dev, irq_ptr->cdev, 310 &ssqd_fops); 311 312 for_each_input_queue(irq_ptr, q, i) 313 setup_debugfs_entry(irq_ptr->debugfs_dev, q); 314 for_each_output_queue(irq_ptr, q, i) 315 setup_debugfs_entry(irq_ptr->debugfs_dev, q); 316 } 317 318 void qdio_shutdown_debug_entries(struct qdio_irq *irq_ptr) 319 { 320 debugfs_remove_recursive(irq_ptr->debugfs_dev); 321 } 322 323 int __init qdio_debug_init(void) 324 { 325 debugfs_root = debugfs_create_dir("qdio", NULL); 326 327 qdio_dbf_setup = debug_register("qdio_setup", 16, 1, 16); 328 debug_register_view(qdio_dbf_setup, &debug_hex_ascii_view); 329 debug_set_level(qdio_dbf_setup, DBF_INFO); 330 DBF_EVENT("dbf created\n"); 331 332 qdio_dbf_error = debug_register("qdio_error", 4, 1, 16); 333 debug_register_view(qdio_dbf_error, &debug_hex_ascii_view); 334 debug_set_level(qdio_dbf_error, DBF_INFO); 335 DBF_ERROR("dbf created\n"); 336 return 0; 337 } 338 339 void qdio_debug_exit(void) 340 { 341 qdio_clear_dbf_list(); 342 debugfs_remove_recursive(debugfs_root); 343 debug_unregister(qdio_dbf_setup); 344 debug_unregister(qdio_dbf_error); 345 } 346