qedi_debugfs.c

  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
 14int qedi_do_not_recover;
 15static struct dentry *qedi_dbg_root;
 16
 17void
 18qedi_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
 38void
 39qedi_dbg_host_exit(struct qedi_dbg_ctx *qedi)
 40{
 41	debugfs_remove_recursive(qedi->bdf_dentry);
 42	qedi->bdf_dentry = NULL;
 43}
 44
 45void
 46qedi_dbg_init(char *drv_name)
 47{
 48	qedi_dbg_root = debugfs_create_dir(drv_name, NULL);
 49}
 50
 51void
 52qedi_dbg_exit(void)
 53{
 54	debugfs_remove_recursive(qedi_dbg_root);
 55	qedi_dbg_root = NULL;
 56}
 57
 58static ssize_t
 59qedi_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
 69static ssize_t
 70qedi_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
 80static 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
 86const 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
 93static ssize_t
 94qedi_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
119static ssize_t
120qedi_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
130static int
131qedi_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
162static int
163qedi_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
172static int
173qedi_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
209static int
210qedi_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
219const 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};