xref: /openbmc/linux/drivers/scsi/fnic/fnic_trace.h (revision e6550b3e)
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