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- /* SPDX-License-Identifier: GPL-2.0-only */
- /* Copyright 2014 Cisco Systems, Inc. All rights reserved. */
- #ifndef __SNIC_TRC_H
- #define __SNIC_TRC_H
- #ifdef CONFIG_SCSI_SNIC_DEBUG_FS
- extern ssize_t simple_read_from_buffer(void __user *to,
- size_t count,
- loff_t *ppos,
- const void *from,
- size_t available);
- extern unsigned int snic_trace_max_pages;
- /* Global Data structure for trace to manage trace functionality */
- struct snic_trc_data {
- u64 ts; /* Time Stamp */
- char *fn; /* Ptr to Function Name */
- u32 hno; /* SCSI Host ID */
- u32 tag; /* Command Tag */
- u64 data[5];
- } __attribute__((__packed__));
- #define SNIC_TRC_ENTRY_SZ 64 /* in Bytes */
- struct snic_trc {
- spinlock_t lock;
- struct snic_trc_data *buf; /* Trace Buffer */
- u32 max_idx; /* Max Index into trace buffer */
- u32 rd_idx;
- u32 wr_idx;
- bool enable; /* Control Variable for Tracing */
- };
- int snic_trc_init(void);
- void snic_trc_free(void);
- void snic_trc_debugfs_init(void);
- void snic_trc_debugfs_term(void);
- struct snic_trc_data *snic_get_trc_buf(void);
- int snic_get_trc_data(char *buf, int buf_sz);
- void snic_debugfs_init(void);
- void snic_debugfs_term(void);
- static inline void
- snic_trace(char *fn, u16 hno, u32 tag, u64 d1, u64 d2, u64 d3, u64 d4, u64 d5)
- {
- struct snic_trc_data *tr_rec = snic_get_trc_buf();
- if (!tr_rec)
- return;
- tr_rec->fn = (char *)fn;
- tr_rec->hno = hno;
- tr_rec->tag = tag;
- tr_rec->data[0] = d1;
- tr_rec->data[1] = d2;
- tr_rec->data[2] = d3;
- tr_rec->data[3] = d4;
- tr_rec->data[4] = d5;
- tr_rec->ts = jiffies; /* Update time stamp at last */
- }
- #define SNIC_TRC(_hno, _tag, d1, d2, d3, d4, d5) \
- do { \
- if (unlikely(snic_glob->trc.enable)) \
- snic_trace((char *)__func__, \
- (u16)(_hno), \
- (u32)(_tag), \
- (u64)(d1), \
- (u64)(d2), \
- (u64)(d3), \
- (u64)(d4), \
- (u64)(d5)); \
- } while (0)
- #else
- #define SNIC_TRC(_hno, _tag, d1, d2, d3, d4, d5) \
- do { \
- if (unlikely(snic_log_level & 0x2)) \
- SNIC_DBG("SnicTrace: %s %2u %2u %llx %llx %llx %llx %llx", \
- (char *)__func__, \
- (u16)(_hno), \
- (u32)(_tag), \
- (u64)(d1), \
- (u64)(d2), \
- (u64)(d3), \
- (u64)(d4), \
- (u64)(d5)); \
- } while (0)
- #endif /* end of CONFIG_SCSI_SNIC_DEBUG_FS */
- #define SNIC_TRC_CMD(sc) \
- ((u64)sc->cmnd[0] << 56 | (u64)sc->cmnd[7] << 40 | \
- (u64)sc->cmnd[8] << 32 | (u64)sc->cmnd[2] << 24 | \
- (u64)sc->cmnd[3] << 16 | (u64)sc->cmnd[4] << 8 | \
- (u64)sc->cmnd[5])
- #define SNIC_TRC_CMD_STATE_FLAGS(sc) \
- ((u64) CMD_FLAGS(sc) << 32 | CMD_STATE(sc))
- #endif /* end of __SNIC_TRC_H */
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