drivers/scsi/fnic/fnic_trace.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /* Copyright 2012 Cisco Systems, Inc.  All rights reserved. */
   3
   4 #ifndef __FNIC_TRACE_H__
   5 #define __FNIC_TRACE_H__
   6
   7 #define FNIC_ENTRY_SIZE_BYTES 64
   8 #define FC_TRC_SIZE_BYTES 256
   9 #define FC_TRC_HEADER_SIZE sizeof(struct fc_trace_hdr)
  10
  11 /*
  12  * Fisrt bit of FNIC_FC_RECV and FNIC_FC_SEND is used to represent the type
  13  * of frame 1 => Eth frame, 0=> FC frame
  14  */
  15
  16 #define FNIC_FC_RECV 0x52 /* Character R */
  17 #define FNIC_FC_SEND 0x54 /* Character T */
  18 #define FNIC_FC_LE 0x4C /* Character L */
  19
  20 extern ssize_t simple_read_from_buffer(void __user *to,
  21                                           size_t count,
  22                                           loff_t *ppos,
  23                                           const void *from,
  24                                           size_t available);
  25
  26 extern unsigned int fnic_trace_max_pages;
  27 extern int fnic_tracing_enabled;
  28 extern unsigned int trace_max_pages;
  29
  30 extern unsigned int fnic_fc_trace_max_pages;
  31 extern int fnic_fc_tracing_enabled;
  32 extern int fnic_fc_trace_cleared;
  33
  34 typedef struct fnic_trace_dbg {
  35         int wr_idx;
  36         int rd_idx;
  37         unsigned long *page_offset;
  38 } fnic_trace_dbg_t;
  39
  40 typedef struct fnic_dbgfs {
  41         int buffer_len;
  42         char *buffer;
  43 } fnic_dbgfs_t;
  44
  45 struct fnic_trace_data {
  46         union {
  47                 struct {
  48                         u32 low;
  49                         u32 high;
  50                 };
  51                 u64 val;
  52         } timestamp, fnaddr;
  53         u32 host_no;
  54         u32 tag;
  55         u64 data[5];
  56 } __attribute__((__packed__));
  57
  58 typedef struct fnic_trace_data fnic_trace_data_t;
  59
  60 struct fc_trace_hdr {
  61         struct timespec64 time_stamp;
  62         u32 host_no;
  63         u8 frame_type;
  64         u8 frame_len;
  65 } __attribute__((__packed__));
  66
  67 #define FC_TRACE_ADDRESS(a) \
  68         ((unsigned long)(a) + sizeof(struct fc_trace_hdr))
  69
  70 #define FNIC_TRACE_ENTRY_SIZE \
  71                   (FNIC_ENTRY_SIZE_BYTES - sizeof(fnic_trace_data_t))
  72
  73 #define FNIC_TRACE(_fn, _hn, _t, _a, _b, _c, _d, _e)           \
  74         if (unlikely(fnic_tracing_enabled)) {                   \
  75                 fnic_trace_data_t *trace_buf = fnic_trace_get_buf(); \
  76                 if (trace_buf) { \
  77                         if (sizeof(unsigned long) < 8) { \
  78                                 trace_buf->timestamp.low = jiffies; \
  79                                 trace_buf->fnaddr.low = (u32)(unsigned long)_fn; \
  80                         } else { \
  81                                 trace_buf->timestamp.val = jiffies; \
  82                                 trace_buf->fnaddr.val = (u64)(unsigned long)_fn; \
  83                         } \
  84                         trace_buf->host_no = _hn; \
  85                         trace_buf->tag = _t; \
  86                         trace_buf->data[0] = (u64)(unsigned long)_a; \
  87                         trace_buf->data[1] = (u64)(unsigned long)_b; \
  88                         trace_buf->data[2] = (u64)(unsigned long)_c; \
  89                         trace_buf->data[3] = (u64)(unsigned long)_d; \
  90                         trace_buf->data[4] = (u64)(unsigned long)_e; \
  91                 } \
  92         }
  93
  94 fnic_trace_data_t *fnic_trace_get_buf(void);
  95 int fnic_get_trace_data(fnic_dbgfs_t *);
  96 int fnic_trace_buf_init(void);
  97 void fnic_trace_free(void);
  98 int fnic_debugfs_init(void);
  99 void fnic_debugfs_terminate(void);
 100 void fnic_trace_debugfs_init(void);
 101 void fnic_trace_debugfs_terminate(void);
 102
 103 /* Fnic FC CTLR Trace releated function */
 104 int fnic_fc_trace_init(void);
 105 void fnic_fc_trace_free(void);
 106 int fnic_fc_trace_set_data(u32 host_no, u8 frame_type,
 107                                 char *frame, u32 fc_frame_len);
 108 int fnic_fc_trace_get_data(fnic_dbgfs_t *fnic_dbgfs_prt, u8 rdata_flag);
 109 void copy_and_format_trace_data(struct fc_trace_hdr *tdata,
 110                                 fnic_dbgfs_t *fnic_dbgfs_prt,
 111                                 int *len, u8 rdata_flag);
 112 void fnic_fc_trace_debugfs_init(void);
 113 void fnic_fc_trace_debugfs_terminate(void);
 114
 115 #endif