2 * Copyright 2014 Cisco Systems, Inc. All rights reserved.
4 * This program is free software; you may redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; version 2 of the License.
8 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
9 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
10 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
11 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
12 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
13 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
14 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
21 #ifdef CONFIG_SCSI_SNIC_DEBUG_FS
23 extern ssize_t simple_read_from_buffer(void __user *to,
29 extern unsigned int snic_trace_max_pages;
31 /* Global Data structure for trace to manage trace functionality */
32 struct snic_trc_data {
33 u64 ts; /* Time Stamp */
34 char *fn; /* Ptr to Function Name */
35 u32 hno; /* SCSI Host ID */
36 u32 tag; /* Command Tag */
38 } __attribute__((__packed__));
40 #define SNIC_TRC_ENTRY_SZ 64 /* in Bytes */
44 struct snic_trc_data *buf; /* Trace Buffer */
45 u32 max_idx; /* Max Index into trace buffer */
48 bool enable; /* Control Variable for Tracing */
50 struct dentry *trc_enable; /* debugfs file object */
51 struct dentry *trc_file;
54 int snic_trc_init(void);
55 void snic_trc_free(void);
56 int snic_trc_debugfs_init(void);
57 void snic_trc_debugfs_term(void);
58 struct snic_trc_data *snic_get_trc_buf(void);
59 int snic_get_trc_data(char *buf, int buf_sz);
61 int snic_debugfs_init(void);
62 void snic_debugfs_term(void);
65 snic_trace(char *fn, u16 hno, u32 tag, u64 d1, u64 d2, u64 d3, u64 d4, u64 d5)
67 struct snic_trc_data *tr_rec = snic_get_trc_buf();
72 tr_rec->fn = (char *)fn;
80 tr_rec->ts = jiffies; /* Update time stamp at last */
83 #define SNIC_TRC(_hno, _tag, d1, d2, d3, d4, d5) \
85 if (unlikely(snic_glob->trc.enable)) \
86 snic_trace((char *)__func__, \
97 #define SNIC_TRC(_hno, _tag, d1, d2, d3, d4, d5) \
99 if (unlikely(snic_log_level & 0x2)) \
100 SNIC_DBG("SnicTrace: %s %2u %2u %llx %llx %llx %llx %llx", \
110 #endif /* end of CONFIG_SCSI_SNIC_DEBUG_FS */
112 #define SNIC_TRC_CMD(sc) \
113 ((u64)sc->cmnd[0] << 56 | (u64)sc->cmnd[7] << 40 | \
114 (u64)sc->cmnd[8] << 32 | (u64)sc->cmnd[2] << 24 | \
115 (u64)sc->cmnd[3] << 16 | (u64)sc->cmnd[4] << 8 | \
118 #define SNIC_TRC_CMD_STATE_FLAGS(sc) \
119 ((u64) CMD_FLAGS(sc) << 32 | CMD_STATE(sc))
121 #endif /* end of __SNIC_TRC_H */