diff options
Diffstat (limited to 'drivers/scsi/snic/snic_trc.h')
| -rw-r--r-- | drivers/scsi/snic/snic_trc.h | 121 |
1 files changed, 121 insertions, 0 deletions
diff --git a/drivers/scsi/snic/snic_trc.h b/drivers/scsi/snic/snic_trc.h new file mode 100644 index 000000000..b37f8867b --- /dev/null +++ b/drivers/scsi/snic/snic_trc.h @@ -0,0 +1,121 @@ +/* + * Copyright 2014 Cisco Systems, Inc. All rights reserved. + * + * This program is free software; you may redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +#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 */ + + struct dentry *trc_enable; /* debugfs file object */ + struct dentry *trc_file; +}; + +int snic_trc_init(void); +void snic_trc_free(void); +int 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); + +int 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 */ |