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1// SPDX-License-Identifier: GPL-2.0-only2/*3 * QLogic iSCSI Offload Driver4 * 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 17void18qedi_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 38void39qedi_dbg_host_exit(struct qedi_dbg_ctx *qedi)40{41	debugfs_remove_recursive(qedi->bdf_dentry);42	qedi->bdf_dentry = NULL;43}44 45void46qedi_dbg_init(char *drv_name)47{48	qedi_dbg_root = debugfs_create_dir(drv_name, NULL);49}50 51void52qedi_dbg_exit(void)53{54	debugfs_remove_recursive(qedi_dbg_root);55	qedi_dbg_root = NULL;56}57 58static ssize_t59qedi_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_t70qedi_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_t94qedi_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_t120qedi_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 int131qedi_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 int163qedi_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 int173qedi_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 int210qedi_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};225