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 116