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 16 debug_info_t *qdio_dbf_setup; 17 debug_info_t *qdio_dbf_error; 18 19 static struct dentry *debugfs_root; 20 #define MAX_DEBUGFS_QUEUES 32 21 static struct dentry *debugfs_queues[MAX_DEBUGFS_QUEUES] = { NULL }; 22 static DEFINE_MUTEX(debugfs_mutex); 23 #define QDIO_DEBUGFS_NAME_LEN 40 24 25 void 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 54 static 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 qdio_siga_sync_q(q); 74 for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; i++) { 75 get_buf_state(q, i, &state, 0); 76 switch (state) { 77 case SLSB_P_INPUT_NOT_INIT: 78 case SLSB_P_OUTPUT_NOT_INIT: 79 seq_printf(m, "N"); 80 break; 81 case SLSB_P_INPUT_PRIMED: 82 case SLSB_CU_OUTPUT_PRIMED: 83 seq_printf(m, "+"); 84 break; 85 case SLSB_P_INPUT_ACK: 86 seq_printf(m, "A"); 87 break; 88 case SLSB_P_INPUT_ERROR: 89 case SLSB_P_OUTPUT_ERROR: 90 seq_printf(m, "x"); 91 break; 92 case SLSB_CU_INPUT_EMPTY: 93 case SLSB_P_OUTPUT_EMPTY: 94 seq_printf(m, "-"); 95 break; 96 case SLSB_P_INPUT_HALTED: 97 case SLSB_P_OUTPUT_HALTED: 98 seq_printf(m, "."); 99 break; 100 default: 101 seq_printf(m, "?"); 102 } 103 if (i == 63) 104 seq_printf(m, "\n"); 105 } 106 seq_printf(m, "\n"); 107 seq_printf(m, "|64 |72 |80 |88 |96 |104 |112 | 127|\n"); 108 return 0; 109 } 110 111 static ssize_t qstat_seq_write(struct file *file, const char __user *buf, 112 size_t count, loff_t *off) 113 { 114 struct seq_file *seq = file->private_data; 115 struct qdio_q *q = seq->private; 116 117 if (!q) 118 return 0; 119 120 if (q->is_input_q) 121 xchg(q->irq_ptr->dsci, 1); 122 local_bh_disable(); 123 tasklet_schedule(&q->tasklet); 124 local_bh_enable(); 125 return count; 126 } 127 128 static int qstat_seq_open(struct inode *inode, struct file *filp) 129 { 130 return single_open(filp, qstat_show, 131 filp->f_path.dentry->d_inode->i_private); 132 } 133 134 static void remove_debugfs_entry(struct qdio_q *q) 135 { 136 int i; 137 138 for (i = 0; i < MAX_DEBUGFS_QUEUES; i++) { 139 if (!debugfs_queues[i]) 140 continue; 141 if (debugfs_queues[i]->d_inode->i_private == q) { 142 debugfs_remove(debugfs_queues[i]); 143 debugfs_queues[i] = NULL; 144 } 145 } 146 } 147 148 static struct file_operations debugfs_fops = { 149 .owner = THIS_MODULE, 150 .open = qstat_seq_open, 151 .read = seq_read, 152 .write = qstat_seq_write, 153 .llseek = seq_lseek, 154 .release = single_release, 155 }; 156 157 static void setup_debugfs_entry(struct qdio_q *q, struct ccw_device *cdev) 158 { 159 int i = 0; 160 char name[QDIO_DEBUGFS_NAME_LEN]; 161 162 while (debugfs_queues[i] != NULL) { 163 i++; 164 if (i >= MAX_DEBUGFS_QUEUES) 165 return; 166 } 167 snprintf(name, QDIO_DEBUGFS_NAME_LEN, "%s_%s_%d", 168 dev_name(&cdev->dev), 169 q->is_input_q ? "input" : "output", 170 q->nr); 171 debugfs_queues[i] = debugfs_create_file(name, S_IFREG | S_IRUGO | S_IWUSR, 172 debugfs_root, q, &debugfs_fops); 173 if (IS_ERR(debugfs_queues[i])) 174 debugfs_queues[i] = NULL; 175 } 176 177 void qdio_setup_debug_entries(struct qdio_irq *irq_ptr, struct ccw_device *cdev) 178 { 179 struct qdio_q *q; 180 int i; 181 182 mutex_lock(&debugfs_mutex); 183 for_each_input_queue(irq_ptr, q, i) 184 setup_debugfs_entry(q, cdev); 185 for_each_output_queue(irq_ptr, q, i) 186 setup_debugfs_entry(q, cdev); 187 mutex_unlock(&debugfs_mutex); 188 } 189 190 void qdio_shutdown_debug_entries(struct qdio_irq *irq_ptr, struct ccw_device *cdev) 191 { 192 struct qdio_q *q; 193 int i; 194 195 mutex_lock(&debugfs_mutex); 196 for_each_input_queue(irq_ptr, q, i) 197 remove_debugfs_entry(q); 198 for_each_output_queue(irq_ptr, q, i) 199 remove_debugfs_entry(q); 200 mutex_unlock(&debugfs_mutex); 201 } 202 203 int __init qdio_debug_init(void) 204 { 205 debugfs_root = debugfs_create_dir("qdio_queues", NULL); 206 207 qdio_dbf_setup = debug_register("qdio_setup", 16, 1, 16); 208 debug_register_view(qdio_dbf_setup, &debug_hex_ascii_view); 209 debug_set_level(qdio_dbf_setup, DBF_INFO); 210 DBF_EVENT("dbf created\n"); 211 212 qdio_dbf_error = debug_register("qdio_error", 4, 1, 16); 213 debug_register_view(qdio_dbf_error, &debug_hex_ascii_view); 214 debug_set_level(qdio_dbf_error, DBF_INFO); 215 DBF_ERROR("dbf created\n"); 216 return 0; 217 } 218 219 void qdio_debug_exit(void) 220 { 221 debugfs_remove(debugfs_root); 222 if (qdio_dbf_setup) 223 debug_unregister(qdio_dbf_setup); 224 if (qdio_dbf_error) 225 debug_unregister(qdio_dbf_error); 226 } 227