1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * QLogic iSCSI Offload Driver
4 * Copyright (c) 2016 Cavium Inc.
5 */
6
7 #include "qedi.h"
8 #include "qedi_dbg.h"
9
10 #include <linux/uaccess.h>
11 #include <linux/debugfs.h>
12 #include <linux/module.h>
13
14 int qedi_do_not_recover;
15 static struct dentry *qedi_dbg_root;
16
17 void
qedi_dbg_host_init(struct qedi_dbg_ctx * qedi,const struct qedi_debugfs_ops * dops,const struct file_operations * fops)18 qedi_dbg_host_init(struct qedi_dbg_ctx *qedi,
19 const struct qedi_debugfs_ops *dops,
20 const struct file_operations *fops)
21 {
22 char host_dirname[32];
23
24 sprintf(host_dirname, "host%u", qedi->host_no);
25 qedi->bdf_dentry = debugfs_create_dir(host_dirname, qedi_dbg_root);
26
27 while (dops) {
28 if (!(dops->name))
29 break;
30
31 debugfs_create_file(dops->name, 0600, qedi->bdf_dentry, qedi,
32 fops);
33 dops++;
34 fops++;
35 }
36 }
37
38 void
qedi_dbg_host_exit(struct qedi_dbg_ctx * qedi)39 qedi_dbg_host_exit(struct qedi_dbg_ctx *qedi)
40 {
41 debugfs_remove_recursive(qedi->bdf_dentry);
42 qedi->bdf_dentry = NULL;
43 }
44
45 void
qedi_dbg_init(char * drv_name)46 qedi_dbg_init(char *drv_name)
47 {
48 qedi_dbg_root = debugfs_create_dir(drv_name, NULL);
49 }
50
51 void
qedi_dbg_exit(void)52 qedi_dbg_exit(void)
53 {
54 debugfs_remove_recursive(qedi_dbg_root);
55 qedi_dbg_root = NULL;
56 }
57
58 static ssize_t
qedi_dbg_do_not_recover_enable(struct qedi_dbg_ctx * qedi_dbg)59 qedi_dbg_do_not_recover_enable(struct qedi_dbg_ctx *qedi_dbg)
60 {
61 if (!qedi_do_not_recover)
62 qedi_do_not_recover = 1;
63
64 QEDI_INFO(qedi_dbg, QEDI_LOG_DEBUGFS, "do_not_recover=%d\n",
65 qedi_do_not_recover);
66 return 0;
67 }
68
69 static ssize_t
qedi_dbg_do_not_recover_disable(struct qedi_dbg_ctx * qedi_dbg)70 qedi_dbg_do_not_recover_disable(struct qedi_dbg_ctx *qedi_dbg)
71 {
72 if (qedi_do_not_recover)
73 qedi_do_not_recover = 0;
74
75 QEDI_INFO(qedi_dbg, QEDI_LOG_DEBUGFS, "do_not_recover=%d\n",
76 qedi_do_not_recover);
77 return 0;
78 }
79
80 static struct qedi_list_of_funcs qedi_dbg_do_not_recover_ops[] = {
81 { "enable", qedi_dbg_do_not_recover_enable },
82 { "disable", qedi_dbg_do_not_recover_disable },
83 { NULL, NULL }
84 };
85
86 const struct qedi_debugfs_ops qedi_debugfs_ops[] = {
87 { "gbl_ctx", NULL },
88 { "do_not_recover", qedi_dbg_do_not_recover_ops},
89 { "io_trace", NULL },
90 { NULL, NULL }
91 };
92
93 static ssize_t
qedi_dbg_do_not_recover_cmd_write(struct file * filp,const char __user * buffer,size_t count,loff_t * ppos)94 qedi_dbg_do_not_recover_cmd_write(struct file *filp, const char __user *buffer,
95 size_t count, loff_t *ppos)
96 {
97 size_t cnt = 0;
98 struct qedi_dbg_ctx *qedi_dbg =
99 (struct qedi_dbg_ctx *)filp->private_data;
100 struct qedi_list_of_funcs *lof = qedi_dbg_do_not_recover_ops;
101
102 if (*ppos)
103 return 0;
104
105 while (lof) {
106 if (!(lof->oper_str))
107 break;
108
109 if (!strncmp(lof->oper_str, buffer, strlen(lof->oper_str))) {
110 cnt = lof->oper_func(qedi_dbg);
111 break;
112 }
113
114 lof++;
115 }
116 return (count - cnt);
117 }
118
119 static ssize_t
qedi_dbg_do_not_recover_cmd_read(struct file * filp,char __user * buffer,size_t count,loff_t * ppos)120 qedi_dbg_do_not_recover_cmd_read(struct file *filp, char __user *buffer,
121 size_t count, loff_t *ppos)
122 {
123 char buf[64];
124 int len;
125
126 len = sprintf(buf, "do_not_recover=%d\n", qedi_do_not_recover);
127 return simple_read_from_buffer(buffer, count, ppos, buf, len);
128 }
129
130 static int
qedi_gbl_ctx_show(struct seq_file * s,void * unused)131 qedi_gbl_ctx_show(struct seq_file *s, void *unused)
132 {
133 struct qedi_fastpath *fp = NULL;
134 struct qed_sb_info *sb_info = NULL;
135 struct status_block *sb = NULL;
136 struct global_queue *que = NULL;
137 int id;
138 u16 prod_idx;
139 struct qedi_ctx *qedi = s->private;
140 unsigned long flags;
141
142 seq_puts(s, " DUMP CQ CONTEXT:\n");
143
144 for (id = 0; id < MIN_NUM_CPUS_MSIX(qedi); id++) {
145 spin_lock_irqsave(&qedi->hba_lock, flags);
146 seq_printf(s, "=========FAST CQ PATH [%d] ==========\n", id);
147 fp = &qedi->fp_array[id];
148 sb_info = fp->sb_info;
149 sb = sb_info->sb_virt;
150 prod_idx = (sb->pi_array[QEDI_PROTO_CQ_PROD_IDX] &
151 STATUS_BLOCK_PROD_INDEX_MASK);
152 seq_printf(s, "SB PROD IDX: %d\n", prod_idx);
153 que = qedi->global_queues[fp->sb_id];
154 seq_printf(s, "DRV CONS IDX: %d\n", que->cq_cons_idx);
155 seq_printf(s, "CQ complete host memory: %d\n", fp->sb_id);
156 seq_puts(s, "=========== END ==================\n\n\n");
157 spin_unlock_irqrestore(&qedi->hba_lock, flags);
158 }
159 return 0;
160 }
161
162 static int
qedi_dbg_gbl_ctx_open(struct inode * inode,struct file * file)163 qedi_dbg_gbl_ctx_open(struct inode *inode, struct file *file)
164 {
165 struct qedi_dbg_ctx *qedi_dbg = inode->i_private;
166 struct qedi_ctx *qedi = container_of(qedi_dbg, struct qedi_ctx,
167 dbg_ctx);
168
169 return single_open(file, qedi_gbl_ctx_show, qedi);
170 }
171
172 static int
qedi_io_trace_show(struct seq_file * s,void * unused)173 qedi_io_trace_show(struct seq_file *s, void *unused)
174 {
175 int id, idx = 0;
176 struct qedi_ctx *qedi = s->private;
177 struct qedi_io_log *io_log;
178 unsigned long flags;
179
180 seq_puts(s, " DUMP IO LOGS:\n");
181 spin_lock_irqsave(&qedi->io_trace_lock, flags);
182 idx = qedi->io_trace_idx;
183 for (id = 0; id < QEDI_IO_TRACE_SIZE; id++) {
184 io_log = &qedi->io_trace_buf[idx];
185 seq_printf(s, "iodir-%d:", io_log->direction);
186 seq_printf(s, "tid-0x%x:", io_log->task_id);
187 seq_printf(s, "cid-0x%x:", io_log->cid);
188 seq_printf(s, "lun-%d:", io_log->lun);
189 seq_printf(s, "op-0x%02x:", io_log->op);
190 seq_printf(s, "0x%02x%02x%02x%02x:", io_log->lba[0],
191 io_log->lba[1], io_log->lba[2], io_log->lba[3]);
192 seq_printf(s, "buflen-%d:", io_log->bufflen);
193 seq_printf(s, "sgcnt-%d:", io_log->sg_count);
194 seq_printf(s, "res-0x%08x:", io_log->result);
195 seq_printf(s, "jif-%lu:", io_log->jiffies);
196 seq_printf(s, "blk_req_cpu-%d:", io_log->blk_req_cpu);
197 seq_printf(s, "req_cpu-%d:", io_log->req_cpu);
198 seq_printf(s, "intr_cpu-%d:", io_log->intr_cpu);
199 seq_printf(s, "blk_rsp_cpu-%d\n", io_log->blk_rsp_cpu);
200
201 idx++;
202 if (idx == QEDI_IO_TRACE_SIZE)
203 idx = 0;
204 }
205 spin_unlock_irqrestore(&qedi->io_trace_lock, flags);
206 return 0;
207 }
208
209 static int
qedi_dbg_io_trace_open(struct inode * inode,struct file * file)210 qedi_dbg_io_trace_open(struct inode *inode, struct file *file)
211 {
212 struct qedi_dbg_ctx *qedi_dbg = inode->i_private;
213 struct qedi_ctx *qedi = container_of(qedi_dbg, struct qedi_ctx,
214 dbg_ctx);
215
216 return single_open(file, qedi_io_trace_show, qedi);
217 }
218
219 const struct file_operations qedi_dbg_fops[] = {
220 qedi_dbg_fileops_seq(qedi, gbl_ctx),
221 qedi_dbg_fileops(qedi, do_not_recover),
222 qedi_dbg_fileops_seq(qedi, io_trace),
223 { },
224 };
225