qdio_debug.c revision 60b5df2f12f2ab54bfa7c1f0f0ce3f5953e73c0b
1/* 2 * drivers/s390/cio/qdio_debug.c 3 * 4 * Copyright IBM Corp. 2008 5 * 6 * Author: Jan Glauber (jang@linux.vnet.ibm.com) 7 */ 8#include <linux/proc_fs.h> 9#include <linux/seq_file.h> 10#include <linux/debugfs.h> 11#include <asm/qdio.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 MAX_DEBUGFS_QUEUES 32 21static struct dentry *debugfs_queues[MAX_DEBUGFS_QUEUES] = { NULL }; 22static DEFINE_MUTEX(debugfs_mutex); 23#define QDIO_DEBUGFS_NAME_LEN 40 24 25void qdio_allocate_dbf(struct qdio_initialize *init_data, 26 struct qdio_irq *irq_ptr) 27{ 28 char text[20]; 29 30 DBF_EVENT("qfmt:%1d", init_data->q_format); 31 DBF_HEX(init_data->adapter_name, 8); 32 DBF_EVENT("qpff%4x", init_data->qib_param_field_format); 33 DBF_HEX(&init_data->qib_param_field, sizeof(void *)); 34 DBF_HEX(&init_data->input_slib_elements, sizeof(void *)); 35 DBF_HEX(&init_data->output_slib_elements, sizeof(void *)); 36 DBF_EVENT("niq:%1d noq:%1d", init_data->no_input_qs, 37 init_data->no_output_qs); 38 DBF_HEX(&init_data->input_handler, sizeof(void *)); 39 DBF_HEX(&init_data->output_handler, sizeof(void *)); 40 DBF_HEX(&init_data->int_parm, sizeof(long)); 41 DBF_HEX(&init_data->flags, sizeof(long)); 42 DBF_HEX(&init_data->input_sbal_addr_array, sizeof(void *)); 43 DBF_HEX(&init_data->output_sbal_addr_array, sizeof(void *)); 44 DBF_EVENT("irq:%8lx", (unsigned long)irq_ptr); 45 46 /* allocate trace view for the interface */ 47 snprintf(text, 20, "qdio_%s", dev_name(&init_data->cdev->dev)); 48 irq_ptr->debug_area = debug_register(text, 2, 1, 16); 49 debug_register_view(irq_ptr->debug_area, &debug_hex_ascii_view); 50 debug_set_level(irq_ptr->debug_area, DBF_WARN); 51 DBF_DEV_EVENT(DBF_ERR, irq_ptr, "dbf created"); 52} 53 54static int qstat_show(struct seq_file *m, void *v) 55{ 56 unsigned char state; 57 struct qdio_q *q = m->private; 58 int i; 59 60 if (!q) 61 return 0; 62 63 seq_printf(m, "device state indicator: %d\n", *(u32 *)q->irq_ptr->dsci); 64 seq_printf(m, "nr_used: %d\n", atomic_read(&q->nr_buf_used)); 65 seq_printf(m, "ftc: %d\n", q->first_to_check); 66 seq_printf(m, "last_move: %d\n", q->last_move); 67 seq_printf(m, "polling: %d\n", q->u.in.polling); 68 seq_printf(m, "ack start: %d\n", q->u.in.ack_start); 69 seq_printf(m, "ack count: %d\n", q->u.in.ack_count); 70 seq_printf(m, "slsb buffer states:\n"); 71 seq_printf(m, "|0 |8 |16 |24 |32 |40 |48 |56 63|\n"); 72 73 for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; i++) { 74 debug_get_buf_state(q, i, &state); 75 switch (state) { 76 case SLSB_P_INPUT_NOT_INIT: 77 case SLSB_P_OUTPUT_NOT_INIT: 78 seq_printf(m, "N"); 79 break; 80 case SLSB_P_INPUT_PRIMED: 81 case SLSB_CU_OUTPUT_PRIMED: 82 seq_printf(m, "+"); 83 break; 84 case SLSB_P_INPUT_ACK: 85 seq_printf(m, "A"); 86 break; 87 case SLSB_P_INPUT_ERROR: 88 case SLSB_P_OUTPUT_ERROR: 89 seq_printf(m, "x"); 90 break; 91 case SLSB_CU_INPUT_EMPTY: 92 case SLSB_P_OUTPUT_EMPTY: 93 seq_printf(m, "-"); 94 break; 95 case SLSB_P_INPUT_HALTED: 96 case SLSB_P_OUTPUT_HALTED: 97 seq_printf(m, "."); 98 break; 99 default: 100 seq_printf(m, "?"); 101 } 102 if (i == 63) 103 seq_printf(m, "\n"); 104 } 105 seq_printf(m, "\n"); 106 seq_printf(m, "|64 |72 |80 |88 |96 |104 |112 | 127|\n"); 107 return 0; 108} 109 110static ssize_t qstat_seq_write(struct file *file, const char __user *buf, 111 size_t count, loff_t *off) 112{ 113 struct seq_file *seq = file->private_data; 114 struct qdio_q *q = seq->private; 115 116 if (!q) 117 return 0; 118 119 if (q->is_input_q) 120 xchg(q->irq_ptr->dsci, 1); 121 local_bh_disable(); 122 tasklet_schedule(&q->tasklet); 123 local_bh_enable(); 124 return count; 125} 126 127static int qstat_seq_open(struct inode *inode, struct file *filp) 128{ 129 return single_open(filp, qstat_show, 130 filp->f_path.dentry->d_inode->i_private); 131} 132 133static void remove_debugfs_entry(struct qdio_q *q) 134{ 135 int i; 136 137 for (i = 0; i < MAX_DEBUGFS_QUEUES; i++) { 138 if (!debugfs_queues[i]) 139 continue; 140 if (debugfs_queues[i]->d_inode->i_private == q) { 141 debugfs_remove(debugfs_queues[i]); 142 debugfs_queues[i] = NULL; 143 } 144 } 145} 146 147static struct file_operations debugfs_fops = { 148 .owner = THIS_MODULE, 149 .open = qstat_seq_open, 150 .read = seq_read, 151 .write = qstat_seq_write, 152 .llseek = seq_lseek, 153 .release = single_release, 154}; 155 156static void setup_debugfs_entry(struct qdio_q *q, struct ccw_device *cdev) 157{ 158 int i = 0; 159 char name[QDIO_DEBUGFS_NAME_LEN]; 160 161 while (debugfs_queues[i] != NULL) { 162 i++; 163 if (i >= MAX_DEBUGFS_QUEUES) 164 return; 165 } 166 snprintf(name, QDIO_DEBUGFS_NAME_LEN, "%s_%s_%d", 167 dev_name(&cdev->dev), 168 q->is_input_q ? "input" : "output", 169 q->nr); 170 debugfs_queues[i] = debugfs_create_file(name, S_IFREG | S_IRUGO | S_IWUSR, 171 debugfs_root, q, &debugfs_fops); 172 if (IS_ERR(debugfs_queues[i])) 173 debugfs_queues[i] = NULL; 174} 175 176void qdio_setup_debug_entries(struct qdio_irq *irq_ptr, struct ccw_device *cdev) 177{ 178 struct qdio_q *q; 179 int i; 180 181 mutex_lock(&debugfs_mutex); 182 for_each_input_queue(irq_ptr, q, i) 183 setup_debugfs_entry(q, cdev); 184 for_each_output_queue(irq_ptr, q, i) 185 setup_debugfs_entry(q, cdev); 186 mutex_unlock(&debugfs_mutex); 187} 188 189void qdio_shutdown_debug_entries(struct qdio_irq *irq_ptr, struct ccw_device *cdev) 190{ 191 struct qdio_q *q; 192 int i; 193 194 mutex_lock(&debugfs_mutex); 195 for_each_input_queue(irq_ptr, q, i) 196 remove_debugfs_entry(q); 197 for_each_output_queue(irq_ptr, q, i) 198 remove_debugfs_entry(q); 199 mutex_unlock(&debugfs_mutex); 200} 201 202int __init qdio_debug_init(void) 203{ 204 debugfs_root = debugfs_create_dir("qdio_queues", NULL); 205 206 qdio_dbf_setup = debug_register("qdio_setup", 16, 1, 16); 207 debug_register_view(qdio_dbf_setup, &debug_hex_ascii_view); 208 debug_set_level(qdio_dbf_setup, DBF_INFO); 209 DBF_EVENT("dbf created\n"); 210 211 qdio_dbf_error = debug_register("qdio_error", 4, 1, 16); 212 debug_register_view(qdio_dbf_error, &debug_hex_ascii_view); 213 debug_set_level(qdio_dbf_error, DBF_INFO); 214 DBF_ERROR("dbf created\n"); 215 return 0; 216} 217 218void qdio_debug_exit(void) 219{ 220 debugfs_remove(debugfs_root); 221 if (qdio_dbf_setup) 222 debug_unregister(qdio_dbf_setup); 223 if (qdio_dbf_error) 224 debug_unregister(qdio_dbf_error); 225} 226