1 /* 2 * QLogic iSCSI Offload Driver 3 * Copyright (c) 2016 Cavium Inc. 4 * 5 * This software is available under the terms of the GNU General Public License 6 * (GPL) Version 2, available from the file COPYING in the main directory of 7 * this source tree. 8 */ 9 10 #include "qedi.h" 11 #include "qedi_dbg.h" 12 13 #include <linux/uaccess.h> 14 #include <linux/debugfs.h> 15 #include <linux/module.h> 16 17 int qedi_do_not_recover; 18 static struct dentry *qedi_dbg_root; 19 20 void 21 qedi_dbg_host_init(struct qedi_dbg_ctx *qedi, 22 struct qedi_debugfs_ops *dops, 23 const struct file_operations *fops) 24 { 25 char host_dirname[32]; 26 struct dentry *file_dentry = NULL; 27 28 sprintf(host_dirname, "host%u", qedi->host_no); 29 qedi->bdf_dentry = debugfs_create_dir(host_dirname, qedi_dbg_root); 30 if (!qedi->bdf_dentry) 31 return; 32 33 while (dops) { 34 if (!(dops->name)) 35 break; 36 37 file_dentry = debugfs_create_file(dops->name, 0600, 38 qedi->bdf_dentry, qedi, 39 fops); 40 if (!file_dentry) { 41 QEDI_INFO(qedi, QEDI_LOG_DEBUGFS, 42 "Debugfs entry %s creation failed\n", 43 dops->name); 44 debugfs_remove_recursive(qedi->bdf_dentry); 45 return; 46 } 47 dops++; 48 fops++; 49 } 50 } 51 52 void 53 qedi_dbg_host_exit(struct qedi_dbg_ctx *qedi) 54 { 55 debugfs_remove_recursive(qedi->bdf_dentry); 56 qedi->bdf_dentry = NULL; 57 } 58 59 void 60 qedi_dbg_init(char *drv_name) 61 { 62 qedi_dbg_root = debugfs_create_dir(drv_name, NULL); 63 if (!qedi_dbg_root) 64 QEDI_INFO(NULL, QEDI_LOG_DEBUGFS, "Init of debugfs failed\n"); 65 } 66 67 void 68 qedi_dbg_exit(void) 69 { 70 debugfs_remove_recursive(qedi_dbg_root); 71 qedi_dbg_root = NULL; 72 } 73 74 static ssize_t 75 qedi_dbg_do_not_recover_enable(struct qedi_dbg_ctx *qedi_dbg) 76 { 77 if (!qedi_do_not_recover) 78 qedi_do_not_recover = 1; 79 80 QEDI_INFO(qedi_dbg, QEDI_LOG_DEBUGFS, "do_not_recover=%d\n", 81 qedi_do_not_recover); 82 return 0; 83 } 84 85 static ssize_t 86 qedi_dbg_do_not_recover_disable(struct qedi_dbg_ctx *qedi_dbg) 87 { 88 if (qedi_do_not_recover) 89 qedi_do_not_recover = 0; 90 91 QEDI_INFO(qedi_dbg, QEDI_LOG_DEBUGFS, "do_not_recover=%d\n", 92 qedi_do_not_recover); 93 return 0; 94 } 95 96 static struct qedi_list_of_funcs qedi_dbg_do_not_recover_ops[] = { 97 { "enable", qedi_dbg_do_not_recover_enable }, 98 { "disable", qedi_dbg_do_not_recover_disable }, 99 { NULL, NULL } 100 }; 101 102 struct qedi_debugfs_ops qedi_debugfs_ops[] = { 103 { "gbl_ctx", NULL }, 104 { "do_not_recover", qedi_dbg_do_not_recover_ops}, 105 { "io_trace", NULL }, 106 { NULL, NULL } 107 }; 108 109 static ssize_t 110 qedi_dbg_do_not_recover_cmd_write(struct file *filp, const char __user *buffer, 111 size_t count, loff_t *ppos) 112 { 113 size_t cnt = 0; 114 struct qedi_dbg_ctx *qedi_dbg = 115 (struct qedi_dbg_ctx *)filp->private_data; 116 struct qedi_list_of_funcs *lof = qedi_dbg_do_not_recover_ops; 117 118 if (*ppos) 119 return 0; 120 121 while (lof) { 122 if (!(lof->oper_str)) 123 break; 124 125 if (!strncmp(lof->oper_str, buffer, strlen(lof->oper_str))) { 126 cnt = lof->oper_func(qedi_dbg); 127 break; 128 } 129 130 lof++; 131 } 132 return (count - cnt); 133 } 134 135 static ssize_t 136 qedi_dbg_do_not_recover_cmd_read(struct file *filp, char __user *buffer, 137 size_t count, loff_t *ppos) 138 { 139 size_t cnt = 0; 140 141 if (*ppos) 142 return 0; 143 144 cnt = sprintf(buffer, "do_not_recover=%d\n", qedi_do_not_recover); 145 cnt = min_t(int, count, cnt - *ppos); 146 *ppos += cnt; 147 return cnt; 148 } 149 150 static int 151 qedi_gbl_ctx_show(struct seq_file *s, void *unused) 152 { 153 struct qedi_fastpath *fp = NULL; 154 struct qed_sb_info *sb_info = NULL; 155 struct status_block_e4 *sb = NULL; 156 struct global_queue *que = NULL; 157 int id; 158 u16 prod_idx; 159 struct qedi_ctx *qedi = s->private; 160 unsigned long flags; 161 162 seq_puts(s, " DUMP CQ CONTEXT:\n"); 163 164 for (id = 0; id < MIN_NUM_CPUS_MSIX(qedi); id++) { 165 spin_lock_irqsave(&qedi->hba_lock, flags); 166 seq_printf(s, "=========FAST CQ PATH [%d] ==========\n", id); 167 fp = &qedi->fp_array[id]; 168 sb_info = fp->sb_info; 169 sb = sb_info->sb_virt; 170 prod_idx = (sb->pi_array[QEDI_PROTO_CQ_PROD_IDX] & 171 STATUS_BLOCK_E4_PROD_INDEX_MASK); 172 seq_printf(s, "SB PROD IDX: %d\n", prod_idx); 173 que = qedi->global_queues[fp->sb_id]; 174 seq_printf(s, "DRV CONS IDX: %d\n", que->cq_cons_idx); 175 seq_printf(s, "CQ complete host memory: %d\n", fp->sb_id); 176 seq_puts(s, "=========== END ==================\n\n\n"); 177 spin_unlock_irqrestore(&qedi->hba_lock, flags); 178 } 179 return 0; 180 } 181 182 static int 183 qedi_dbg_gbl_ctx_open(struct inode *inode, struct file *file) 184 { 185 struct qedi_dbg_ctx *qedi_dbg = inode->i_private; 186 struct qedi_ctx *qedi = container_of(qedi_dbg, struct qedi_ctx, 187 dbg_ctx); 188 189 return single_open(file, qedi_gbl_ctx_show, qedi); 190 } 191 192 static int 193 qedi_io_trace_show(struct seq_file *s, void *unused) 194 { 195 int id, idx = 0; 196 struct qedi_ctx *qedi = s->private; 197 struct qedi_io_log *io_log; 198 unsigned long flags; 199 200 seq_puts(s, " DUMP IO LOGS:\n"); 201 spin_lock_irqsave(&qedi->io_trace_lock, flags); 202 idx = qedi->io_trace_idx; 203 for (id = 0; id < QEDI_IO_TRACE_SIZE; id++) { 204 io_log = &qedi->io_trace_buf[idx]; 205 seq_printf(s, "iodir-%d:", io_log->direction); 206 seq_printf(s, "tid-0x%x:", io_log->task_id); 207 seq_printf(s, "cid-0x%x:", io_log->cid); 208 seq_printf(s, "lun-%d:", io_log->lun); 209 seq_printf(s, "op-0x%02x:", io_log->op); 210 seq_printf(s, "0x%02x%02x%02x%02x:", io_log->lba[0], 211 io_log->lba[1], io_log->lba[2], io_log->lba[3]); 212 seq_printf(s, "buflen-%d:", io_log->bufflen); 213 seq_printf(s, "sgcnt-%d:", io_log->sg_count); 214 seq_printf(s, "res-0x%08x:", io_log->result); 215 seq_printf(s, "jif-%lu:", io_log->jiffies); 216 seq_printf(s, "blk_req_cpu-%d:", io_log->blk_req_cpu); 217 seq_printf(s, "req_cpu-%d:", io_log->req_cpu); 218 seq_printf(s, "intr_cpu-%d:", io_log->intr_cpu); 219 seq_printf(s, "blk_rsp_cpu-%d\n", io_log->blk_rsp_cpu); 220 221 idx++; 222 if (idx == QEDI_IO_TRACE_SIZE) 223 idx = 0; 224 } 225 spin_unlock_irqrestore(&qedi->io_trace_lock, flags); 226 return 0; 227 } 228 229 static int 230 qedi_dbg_io_trace_open(struct inode *inode, struct file *file) 231 { 232 struct qedi_dbg_ctx *qedi_dbg = inode->i_private; 233 struct qedi_ctx *qedi = container_of(qedi_dbg, struct qedi_ctx, 234 dbg_ctx); 235 236 return single_open(file, qedi_io_trace_show, qedi); 237 } 238 239 const struct file_operations qedi_dbg_fops[] = { 240 qedi_dbg_fileops_seq(qedi, gbl_ctx), 241 qedi_dbg_fileops(qedi, do_not_recover), 242 qedi_dbg_fileops_seq(qedi, io_trace), 243 { }, 244 }; 245