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1// SPDX-License-Identifier: GPL-2.02/*3 * Copyright IBM Corp. 2008, 20094 *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 16debug_info_t *qdio_dbf_setup;17debug_info_t *qdio_dbf_error;18 19static struct dentry *debugfs_root;20#define QDIO_DEBUGFS_NAME_LEN 1021#define QDIO_DBF_NAME_LEN 2022 23struct 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 29static LIST_HEAD(qdio_dbf_list);30static DEFINE_MUTEX(qdio_dbf_list_mutex);31 32static 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 48static 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 61int 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 strscpy(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 99static 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: %llx\n", q->timestamp);109 seq_printf(m, "Last Data IRQ: %llx Last AI: %llx\n",110 q->irq_ptr->last_data_irq_time, last_ai_time);111 seq_printf(m, "nr_used: %d ftc: %d\n",112 atomic_read(&q->nr_buf_used), q->first_to_check);113 if (q->is_input_q) {114 seq_printf(m, "batch start: %u batch count: %u\n",115 q->u.in.batch_start, q->u.in.batch_count);116 seq_printf(m, "DSCI: %x IRQs disabled: %u\n",117 *(u8 *)q->irq_ptr->dsci,118 test_bit(QDIO_IRQ_DISABLED,119 &q->irq_ptr->poll_state));120 }121 seq_printf(m, "SBAL states:\n");122 seq_printf(m, "|0 |8 |16 |24 |32 |40 |48 |56 63|\n");123 124 for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; i++) {125 debug_get_buf_state(q, i, &state);126 switch (state) {127 case SLSB_P_INPUT_NOT_INIT:128 case SLSB_P_OUTPUT_NOT_INIT:129 seq_printf(m, "N");130 break;131 case SLSB_P_OUTPUT_PENDING:132 seq_printf(m, "P");133 break;134 case SLSB_P_INPUT_PRIMED:135 case SLSB_CU_OUTPUT_PRIMED:136 seq_printf(m, "+");137 break;138 case SLSB_P_INPUT_ACK:139 seq_printf(m, "A");140 break;141 case SLSB_P_INPUT_ERROR:142 case SLSB_P_OUTPUT_ERROR:143 seq_printf(m, "x");144 break;145 case SLSB_CU_INPUT_EMPTY:146 case SLSB_P_OUTPUT_EMPTY:147 seq_printf(m, "-");148 break;149 case SLSB_P_INPUT_HALTED:150 case SLSB_P_OUTPUT_HALTED:151 seq_printf(m, ".");152 break;153 default:154 seq_printf(m, "?");155 }156 if (i == 63)157 seq_printf(m, "\n");158 }159 seq_printf(m, "\n");160 seq_printf(m, "|64 |72 |80 |88 |96 |104 |112 | 127|\n");161 162 seq_printf(m, "\nSBAL statistics:");163 if (!q->irq_ptr->perf_stat_enabled) {164 seq_printf(m, " disabled\n");165 return 0;166 }167 168 seq_printf(m, "\n1 2.. 4.. 8.. "169 "16.. 32.. 64.. 128\n");170 for (i = 0; i < ARRAY_SIZE(q->q_stats.nr_sbals); i++)171 seq_printf(m, "%-10u ", q->q_stats.nr_sbals[i]);172 seq_printf(m, "\nError NOP Total\n%-10u %-10u %-10u\n\n",173 q->q_stats.nr_sbal_error, q->q_stats.nr_sbal_nop,174 q->q_stats.nr_sbal_total);175 return 0;176}177 178DEFINE_SHOW_ATTRIBUTE(qstat);179 180static int ssqd_show(struct seq_file *m, void *v)181{182 struct ccw_device *cdev = m->private;183 struct qdio_ssqd_desc ssqd;184 int rc;185 186 rc = qdio_get_ssqd_desc(cdev, &ssqd);187 if (rc)188 return rc;189 190 seq_hex_dump(m, "", DUMP_PREFIX_NONE, 16, 4, &ssqd, sizeof(ssqd),191 false);192 return 0;193}194 195DEFINE_SHOW_ATTRIBUTE(ssqd);196 197static char *qperf_names[] = {198 "Assumed adapter interrupts",199 "QDIO interrupts",200 "SIGA read",201 "SIGA write",202 "SIGA sync",203 "Inbound calls",204 "Inbound stop_polling",205 "Inbound queue full",206 "Outbound calls",207 "Outbound queue full",208 "Outbound fast_requeue",209 "Outbound target_full",210 "QEBSM eqbs",211 "QEBSM eqbs partial",212 "QEBSM sqbs",213 "QEBSM sqbs partial",214 "Discarded interrupts"215};216 217static int qperf_show(struct seq_file *m, void *v)218{219 struct qdio_irq *irq_ptr = m->private;220 unsigned int *stat;221 int i;222 223 if (!irq_ptr)224 return 0;225 if (!irq_ptr->perf_stat_enabled) {226 seq_printf(m, "disabled\n");227 return 0;228 }229 stat = (unsigned int *)&irq_ptr->perf_stat;230 231 for (i = 0; i < ARRAY_SIZE(qperf_names); i++)232 seq_printf(m, "%26s:\t%u\n",233 qperf_names[i], *(stat + i));234 return 0;235}236 237static ssize_t qperf_seq_write(struct file *file, const char __user *ubuf,238 size_t count, loff_t *off)239{240 struct seq_file *seq = file->private_data;241 struct qdio_irq *irq_ptr = seq->private;242 struct qdio_q *q;243 unsigned long val;244 int ret, i;245 246 if (!irq_ptr)247 return 0;248 249 ret = kstrtoul_from_user(ubuf, count, 10, &val);250 if (ret)251 return ret;252 253 switch (val) {254 case 0:255 irq_ptr->perf_stat_enabled = 0;256 memset(&irq_ptr->perf_stat, 0, sizeof(irq_ptr->perf_stat));257 for_each_input_queue(irq_ptr, q, i)258 memset(&q->q_stats, 0, sizeof(q->q_stats));259 for_each_output_queue(irq_ptr, q, i)260 memset(&q->q_stats, 0, sizeof(q->q_stats));261 break;262 case 1:263 irq_ptr->perf_stat_enabled = 1;264 break;265 }266 return count;267}268 269static int qperf_seq_open(struct inode *inode, struct file *filp)270{271 return single_open(filp, qperf_show,272 file_inode(filp)->i_private);273}274 275static const struct file_operations debugfs_perf_fops = {276 .owner = THIS_MODULE,277 .open = qperf_seq_open,278 .read = seq_read,279 .write = qperf_seq_write,280 .llseek = seq_lseek,281 .release = single_release,282};283 284static void setup_debugfs_entry(struct dentry *parent, struct qdio_q *q)285{286 char name[QDIO_DEBUGFS_NAME_LEN];287 288 snprintf(name, QDIO_DEBUGFS_NAME_LEN, "%s_%d",289 q->is_input_q ? "input" : "output",290 q->nr);291 debugfs_create_file(name, 0444, parent, q, &qstat_fops);292}293 294void qdio_setup_debug_entries(struct qdio_irq *irq_ptr)295{296 struct qdio_q *q;297 int i;298 299 irq_ptr->debugfs_dev = debugfs_create_dir(dev_name(&irq_ptr->cdev->dev),300 debugfs_root);301 debugfs_create_file("statistics", S_IFREG | S_IRUGO | S_IWUSR,302 irq_ptr->debugfs_dev, irq_ptr, &debugfs_perf_fops);303 debugfs_create_file("ssqd", 0444, irq_ptr->debugfs_dev, irq_ptr->cdev,304 &ssqd_fops);305 306 for_each_input_queue(irq_ptr, q, i)307 setup_debugfs_entry(irq_ptr->debugfs_dev, q);308 for_each_output_queue(irq_ptr, q, i)309 setup_debugfs_entry(irq_ptr->debugfs_dev, q);310}311 312void qdio_shutdown_debug_entries(struct qdio_irq *irq_ptr)313{314 debugfs_remove_recursive(irq_ptr->debugfs_dev);315}316 317int __init qdio_debug_init(void)318{319 debugfs_root = debugfs_create_dir("qdio", NULL);320 321 qdio_dbf_setup = debug_register("qdio_setup", 16, 1, 16);322 debug_register_view(qdio_dbf_setup, &debug_hex_ascii_view);323 debug_set_level(qdio_dbf_setup, DBF_INFO);324 DBF_EVENT("dbf created\n");325 326 qdio_dbf_error = debug_register("qdio_error", 4, 1, 16);327 debug_register_view(qdio_dbf_error, &debug_hex_ascii_view);328 debug_set_level(qdio_dbf_error, DBF_INFO);329 DBF_ERROR("dbf created\n");330 return 0;331}332 333void qdio_debug_exit(void)334{335 qdio_clear_dbf_list();336 debugfs_remove_recursive(debugfs_root);337 debug_unregister(qdio_dbf_setup);338 debug_unregister(qdio_dbf_error);339}340