1 /* 2 * Copyright 2012 Cisco Systems, Inc. All rights reserved. 3 * 4 * This program is free software; you may redistribute it and/or modify 5 * it under the terms of the GNU General Public License as published by 6 * the Free Software Foundation; version 2 of the License. 7 * 8 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 9 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 10 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 11 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 12 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 13 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 14 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 15 * SOFTWARE. 16 */ 17 18 #ifndef __FNIC_TRACE_H__ 19 #define __FNIC_TRACE_H__ 20 21 #define FNIC_ENTRY_SIZE_BYTES 64 22 #define FC_TRC_SIZE_BYTES 256 23 #define FC_TRC_HEADER_SIZE sizeof(struct fc_trace_hdr) 24 25 /* 26 * Fisrt bit of FNIC_FC_RECV and FNIC_FC_SEND is used to represent the type 27 * of frame 1 => Eth frame, 0=> FC frame 28 */ 29 30 #define FNIC_FC_RECV 0x52 /* Character R */ 31 #define FNIC_FC_SEND 0x54 /* Character T */ 32 #define FNIC_FC_LE 0x4C /* Character L */ 33 34 extern ssize_t simple_read_from_buffer(void __user *to, 35 size_t count, 36 loff_t *ppos, 37 const void *from, 38 size_t available); 39 40 extern unsigned int fnic_trace_max_pages; 41 extern int fnic_tracing_enabled; 42 extern unsigned int trace_max_pages; 43 44 extern unsigned int fnic_fc_trace_max_pages; 45 extern int fnic_fc_tracing_enabled; 46 extern int fnic_fc_trace_cleared; 47 48 typedef struct fnic_trace_dbg { 49 int wr_idx; 50 int rd_idx; 51 unsigned long *page_offset; 52 } fnic_trace_dbg_t; 53 54 typedef struct fnic_dbgfs { 55 int buffer_len; 56 char *buffer; 57 } fnic_dbgfs_t; 58 59 struct fnic_trace_data { 60 union { 61 struct { 62 u32 low; 63 u32 high; 64 }; 65 u64 val; 66 } timestamp, fnaddr; 67 u32 host_no; 68 u32 tag; 69 u64 data[5]; 70 } __attribute__((__packed__)); 71 72 typedef struct fnic_trace_data fnic_trace_data_t; 73 74 struct fc_trace_hdr { 75 struct timespec time_stamp; 76 u32 host_no; 77 u8 frame_type; 78 u8 frame_len; 79 } __attribute__((__packed__)); 80 81 #define FC_TRACE_ADDRESS(a) \ 82 ((unsigned long)(a) + sizeof(struct fc_trace_hdr)) 83 84 #define FNIC_TRACE_ENTRY_SIZE \ 85 (FNIC_ENTRY_SIZE_BYTES - sizeof(fnic_trace_data_t)) 86 87 #define FNIC_TRACE(_fn, _hn, _t, _a, _b, _c, _d, _e) \ 88 if (unlikely(fnic_tracing_enabled)) { \ 89 fnic_trace_data_t *trace_buf = fnic_trace_get_buf(); \ 90 if (trace_buf) { \ 91 if (sizeof(unsigned long) < 8) { \ 92 trace_buf->timestamp.low = jiffies; \ 93 trace_buf->fnaddr.low = (u32)(unsigned long)_fn; \ 94 } else { \ 95 trace_buf->timestamp.val = jiffies; \ 96 trace_buf->fnaddr.val = (u64)(unsigned long)_fn; \ 97 } \ 98 trace_buf->host_no = _hn; \ 99 trace_buf->tag = _t; \ 100 trace_buf->data[0] = (u64)(unsigned long)_a; \ 101 trace_buf->data[1] = (u64)(unsigned long)_b; \ 102 trace_buf->data[2] = (u64)(unsigned long)_c; \ 103 trace_buf->data[3] = (u64)(unsigned long)_d; \ 104 trace_buf->data[4] = (u64)(unsigned long)_e; \ 105 } \ 106 } 107 108 fnic_trace_data_t *fnic_trace_get_buf(void); 109 int fnic_get_trace_data(fnic_dbgfs_t *); 110 int fnic_trace_buf_init(void); 111 void fnic_trace_free(void); 112 int fnic_debugfs_init(void); 113 void fnic_debugfs_terminate(void); 114 int fnic_trace_debugfs_init(void); 115 void fnic_trace_debugfs_terminate(void); 116 117 /* Fnic FC CTLR Trace releated function */ 118 int fnic_fc_trace_init(void); 119 void fnic_fc_trace_free(void); 120 int fnic_fc_trace_set_data(u32 host_no, u8 frame_type, 121 char *frame, u32 fc_frame_len); 122 int fnic_fc_trace_get_data(fnic_dbgfs_t *fnic_dbgfs_prt, u8 rdata_flag); 123 void copy_and_format_trace_data(struct fc_trace_hdr *tdata, 124 fnic_dbgfs_t *fnic_dbgfs_prt, 125 int *len, u8 rdata_flag); 126 int fnic_fc_trace_debugfs_init(void); 127 void fnic_fc_trace_debugfs_terminate(void); 128 129 #endif 130