1/* SPDX-License-Identifier: GPL-2.0-only */
2/* Copyright 2014 Cisco Systems, Inc. All rights reserved. */
3
4#ifndef __SNIC_TRC_H
5#define __SNIC_TRC_H
6
7#ifdef CONFIG_SCSI_SNIC_DEBUG_FS
8
9extern ssize_t simple_read_from_buffer(void __user *to,
10 size_t count,
11 loff_t *ppos,
12 const void *from,
13 size_t available);
14
15extern unsigned int snic_trace_max_pages;
16
17/* Global Data structure for trace to manage trace functionality */
18struct snic_trc_data {
19 u64 ts; /* Time Stamp */
20 char *fn; /* Ptr to Function Name */
21 u32 hno; /* SCSI Host ID */
22 u32 tag; /* Command Tag */
23 u64 data[5];
24} __attribute__((__packed__));
25
26#define SNIC_TRC_ENTRY_SZ 64 /* in Bytes */
27
28struct snic_trc {
29 spinlock_t lock;
30 struct snic_trc_data *buf; /* Trace Buffer */
31 u32 max_idx; /* Max Index into trace buffer */
32 u32 rd_idx;
33 u32 wr_idx;
34 bool enable; /* Control Variable for Tracing */
35};
36
37int snic_trc_init(void);
38void snic_trc_free(void);
39void snic_trc_debugfs_init(void);
40void snic_trc_debugfs_term(void);
41struct snic_trc_data *snic_get_trc_buf(void);
42int snic_get_trc_data(char *buf, int buf_sz);
43
44void snic_debugfs_init(void);
45void snic_debugfs_term(void);
46
47static inline void
48snic_trace(char *fn, u16 hno, u32 tag, u64 d1, u64 d2, u64 d3, u64 d4, u64 d5)
49{
50 struct snic_trc_data *tr_rec = snic_get_trc_buf();
51
52 if (!tr_rec)
53 return;
54
55 tr_rec->fn = (char *)fn;
56 tr_rec->hno = hno;
57 tr_rec->tag = tag;
58 tr_rec->data[0] = d1;
59 tr_rec->data[1] = d2;
60 tr_rec->data[2] = d3;
61 tr_rec->data[3] = d4;
62 tr_rec->data[4] = d5;
63 tr_rec->ts = jiffies; /* Update time stamp at last */
64}
65
66#define SNIC_TRC(_hno, _tag, d1, d2, d3, d4, d5) \
67 do { \
68 if (unlikely(snic_glob->trc.enable)) \
69 snic_trace((char *)__func__, \
70 (u16)(_hno), \
71 (u32)(_tag), \
72 (u64)(d1), \
73 (u64)(d2), \
74 (u64)(d3), \
75 (u64)(d4), \
76 (u64)(d5)); \
77 } while (0)
78#else
79
80#define SNIC_TRC(_hno, _tag, d1, d2, d3, d4, d5) \
81 do { \
82 if (unlikely(snic_log_level & 0x2)) \
83 SNIC_DBG("SnicTrace: %s %2u %2u %llx %llx %llx %llx %llx", \
84 (char *)__func__, \
85 (u16)(_hno), \
86 (u32)(_tag), \
87 (u64)(d1), \
88 (u64)(d2), \
89 (u64)(d3), \
90 (u64)(d4), \
91 (u64)(d5)); \
92 } while (0)
93#endif /* end of CONFIG_SCSI_SNIC_DEBUG_FS */
94
95#define SNIC_TRC_CMD(sc) \
96 ((u64)sc->cmnd[0] << 56 | (u64)sc->cmnd[7] << 40 | \
97 (u64)sc->cmnd[8] << 32 | (u64)sc->cmnd[2] << 24 | \
98 (u64)sc->cmnd[3] << 16 | (u64)sc->cmnd[4] << 8 | \
99 (u64)sc->cmnd[5])
100
101#define SNIC_TRC_CMD_STATE_FLAGS(sc) \
102 ((u64) CMD_FLAGS(sc) << 32 | CMD_STATE(sc))
103
104#endif /* end of __SNIC_TRC_H */
105

source code of linux/drivers/scsi/snic/snic_trc.h