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 9 extern 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 15 extern unsigned int snic_trace_max_pages; 16 17 /* Global Data structure for trace to manage trace functionality */ 18 struct 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 28 struct 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 37 int snic_trc_init(void); 38 void snic_trc_free(void); 39 void snic_trc_debugfs_init(void); 40 void snic_trc_debugfs_term(void); 41 struct snic_trc_data *snic_get_trc_buf(void); 42 int snic_get_trc_data(char *buf, int buf_sz); 43 44 void snic_debugfs_init(void); 45 void snic_debugfs_term(void); 46 47 static inline void 48 snic_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