1 /* 2 * drivers/s390/cio/qdio_debug.c 3 * 4 * Copyright IBM Corp. 2008,2009 5 * 6 * Author: Jan Glauber (jang@linux.vnet.ibm.com) 7 */ 8 #include <linux/seq_file.h> 9 #include <linux/debugfs.h> 10 #include <asm/debug.h> 11 #include "qdio_debug.h" 12 #include "qdio.h" 13 14 debug_info_t *qdio_dbf_setup; 15 debug_info_t *qdio_dbf_error; 16 17 static struct dentry *debugfs_root; 18 #define QDIO_DEBUGFS_NAME_LEN 10 19 20 void qdio_allocate_dbf(struct qdio_initialize *init_data, 21 struct qdio_irq *irq_ptr) 22 { 23 char text[20]; 24 25 DBF_EVENT("qfmt:%1d", init_data->q_format); 26 DBF_HEX(init_data->adapter_name, 8); 27 DBF_EVENT("qpff%4x", init_data->qib_param_field_format); 28 DBF_HEX(&init_data->qib_param_field, sizeof(void *)); 29 DBF_HEX(&init_data->input_slib_elements, sizeof(void *)); 30 DBF_HEX(&init_data->output_slib_elements, sizeof(void *)); 31 DBF_EVENT("niq:%1d noq:%1d", init_data->no_input_qs, 32 init_data->no_output_qs); 33 DBF_HEX(&init_data->input_handler, sizeof(void *)); 34 DBF_HEX(&init_data->output_handler, sizeof(void *)); 35 DBF_HEX(&init_data->int_parm, sizeof(long)); 36 DBF_HEX(&init_data->flags, sizeof(long)); 37 DBF_HEX(&init_data->input_sbal_addr_array, sizeof(void *)); 38 DBF_HEX(&init_data->output_sbal_addr_array, sizeof(void *)); 39 DBF_EVENT("irq:%8lx", (unsigned long)irq_ptr); 40 41 /* allocate trace view for the interface */ 42 snprintf(text, 20, "qdio_%s", dev_name(&init_data->cdev->dev)); 43 irq_ptr->debug_area = debug_register(text, 2, 1, 16); 44 debug_register_view(irq_ptr->debug_area, &debug_hex_ascii_view); 45 debug_set_level(irq_ptr->debug_area, DBF_WARN); 46 DBF_DEV_EVENT(DBF_ERR, irq_ptr, "dbf created"); 47 } 48 49 static int qstat_show(struct seq_file *m, void *v) 50 { 51 unsigned char state; 52 struct qdio_q *q = m->private; 53 int i; 54 55 if (!q) 56 return 0; 57 58 seq_printf(m, "device state indicator: %d\n", *(u32 *)q->irq_ptr->dsci); 59 seq_printf(m, "nr_used: %d\n", atomic_read(&q->nr_buf_used)); 60 seq_printf(m, "ftc: %d\n", q->first_to_check); 61 seq_printf(m, "last_move: %d\n", q->last_move); 62 seq_printf(m, "polling: %d\n", q->u.in.polling); 63 seq_printf(m, "ack start: %d\n", q->u.in.ack_start); 64 seq_printf(m, "ack count: %d\n", q->u.in.ack_count); 65 seq_printf(m, "slsb buffer states:\n"); 66 seq_printf(m, "|0 |8 |16 |24 |32 |40 |48 |56 63|\n"); 67 68 for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; i++) { 69 debug_get_buf_state(q, i, &state); 70 switch (state) { 71 case SLSB_P_INPUT_NOT_INIT: 72 case SLSB_P_OUTPUT_NOT_INIT: 73 seq_printf(m, "N"); 74 break; 75 case SLSB_P_INPUT_PRIMED: 76 case SLSB_CU_OUTPUT_PRIMED: 77 seq_printf(m, "+"); 78 break; 79 case SLSB_P_INPUT_ACK: 80 seq_printf(m, "A"); 81 break; 82 case SLSB_P_INPUT_ERROR: 83 case SLSB_P_OUTPUT_ERROR: 84 seq_printf(m, "x"); 85 break; 86 case SLSB_CU_INPUT_EMPTY: 87 case SLSB_P_OUTPUT_EMPTY: 88 seq_printf(m, "-"); 89 break; 90 case SLSB_P_INPUT_HALTED: 91 case SLSB_P_OUTPUT_HALTED: 92 seq_printf(m, "."); 93 break; 94 default: 95 seq_printf(m, "?"); 96 } 97 if (i == 63) 98 seq_printf(m, "\n"); 99 } 100 seq_printf(m, "\n"); 101 seq_printf(m, "|64 |72 |80 |88 |96 |104 |112 | 127|\n"); 102 return 0; 103 } 104 105 static ssize_t qstat_seq_write(struct file *file, const char __user *buf, 106 size_t count, loff_t *off) 107 { 108 struct seq_file *seq = file->private_data; 109 struct qdio_q *q = seq->private; 110 111 if (!q) 112 return 0; 113 114 if (q->is_input_q) 115 xchg(q->irq_ptr->dsci, 1); 116 local_bh_disable(); 117 tasklet_schedule(&q->tasklet); 118 local_bh_enable(); 119 return count; 120 } 121 122 static int qstat_seq_open(struct inode *inode, struct file *filp) 123 { 124 return single_open(filp, qstat_show, 125 filp->f_path.dentry->d_inode->i_private); 126 } 127 128 static struct file_operations debugfs_fops = { 129 .owner = THIS_MODULE, 130 .open = qstat_seq_open, 131 .read = seq_read, 132 .write = qstat_seq_write, 133 .llseek = seq_lseek, 134 .release = single_release, 135 }; 136 137 static void setup_debugfs_entry(struct qdio_q *q, struct ccw_device *cdev) 138 { 139 char name[QDIO_DEBUGFS_NAME_LEN]; 140 141 snprintf(name, QDIO_DEBUGFS_NAME_LEN, "%s_%d", 142 q->is_input_q ? "input" : "output", 143 q->nr); 144 q->debugfs_q = debugfs_create_file(name, S_IFREG | S_IRUGO | S_IWUSR, 145 q->irq_ptr->debugfs_dev, q, &debugfs_fops); 146 if (IS_ERR(q->debugfs_q)) 147 q->debugfs_q = NULL; 148 } 149 150 void qdio_setup_debug_entries(struct qdio_irq *irq_ptr, struct ccw_device *cdev) 151 { 152 struct qdio_q *q; 153 int i; 154 155 irq_ptr->debugfs_dev = debugfs_create_dir(dev_name(&cdev->dev), 156 debugfs_root); 157 if (IS_ERR(irq_ptr->debugfs_dev)) 158 irq_ptr->debugfs_dev = NULL; 159 for_each_input_queue(irq_ptr, q, i) 160 setup_debugfs_entry(q, cdev); 161 for_each_output_queue(irq_ptr, q, i) 162 setup_debugfs_entry(q, cdev); 163 } 164 165 void qdio_shutdown_debug_entries(struct qdio_irq *irq_ptr, struct ccw_device *cdev) 166 { 167 struct qdio_q *q; 168 int i; 169 170 for_each_input_queue(irq_ptr, q, i) 171 debugfs_remove(q->debugfs_q); 172 for_each_output_queue(irq_ptr, q, i) 173 debugfs_remove(q->debugfs_q); 174 debugfs_remove(irq_ptr->debugfs_dev); 175 } 176 177 int __init qdio_debug_init(void) 178 { 179 debugfs_root = debugfs_create_dir("qdio", NULL); 180 181 qdio_dbf_setup = debug_register("qdio_setup", 16, 1, 16); 182 debug_register_view(qdio_dbf_setup, &debug_hex_ascii_view); 183 debug_set_level(qdio_dbf_setup, DBF_INFO); 184 DBF_EVENT("dbf created\n"); 185 186 qdio_dbf_error = debug_register("qdio_error", 4, 1, 16); 187 debug_register_view(qdio_dbf_error, &debug_hex_ascii_view); 188 debug_set_level(qdio_dbf_error, DBF_INFO); 189 DBF_ERROR("dbf created\n"); 190 return 0; 191 } 192 193 void qdio_debug_exit(void) 194 { 195 debugfs_remove(debugfs_root); 196 if (qdio_dbf_setup) 197 debug_unregister(qdio_dbf_setup); 198 if (qdio_dbf_error) 199 debug_unregister(qdio_dbf_error); 200 } 201