1// SPDX-License-Identifier: GPL-2.0
2/*
3 * HiSilicon PCIe Trace and Tuning (PTT) support
4 * Copyright (c) 2022 HiSilicon Technologies Co., Ltd.
5 */
6
7#include <stdlib.h>
8#include <stdio.h>
9#include <string.h>
10#include <endian.h>
11#include <byteswap.h>
12#include <linux/bitops.h>
13#include <stdarg.h>
14
15#include "../color.h"
16#include "hisi-ptt-pkt-decoder.h"
17
18/*
19 * For 8DW format, the bit[31:11] of DW0 is always 0x1fffff, which can be
20 * used to distinguish the data format.
21 * 8DW format is like:
22 *   bits [                 31:11                 ][       10:0       ]
23 *        |---------------------------------------|-------------------|
24 *    DW0 [                0x1fffff               ][ Reserved (0x7ff) ]
25 *    DW1 [                       Prefix                              ]
26 *    DW2 [                     Header DW0                            ]
27 *    DW3 [                     Header DW1                            ]
28 *    DW4 [                     Header DW2                            ]
29 *    DW5 [                     Header DW3                            ]
30 *    DW6 [                   Reserved (0x0)                          ]
31 *    DW7 [                        Time                               ]
32 *
33 * 4DW format is like:
34 *   bits [31:30] [ 29:25 ][24][23][22][21][    20:11   ][    10:0    ]
35 *        |-----|---------|---|---|---|---|-------------|-------------|
36 *    DW0 [ Fmt ][  Type  ][T9][T8][TH][SO][   Length   ][    Time    ]
37 *    DW1 [                     Header DW1                            ]
38 *    DW2 [                     Header DW2                            ]
39 *    DW3 [                     Header DW3                            ]
40 */
41
42enum hisi_ptt_8dw_pkt_field_type {
43	HISI_PTT_8DW_CHK_AND_RSV0,
44	HISI_PTT_8DW_PREFIX,
45	HISI_PTT_8DW_HEAD0,
46	HISI_PTT_8DW_HEAD1,
47	HISI_PTT_8DW_HEAD2,
48	HISI_PTT_8DW_HEAD3,
49	HISI_PTT_8DW_RSV1,
50	HISI_PTT_8DW_TIME,
51	HISI_PTT_8DW_TYPE_MAX
52};
53
54enum hisi_ptt_4dw_pkt_field_type {
55	HISI_PTT_4DW_HEAD1,
56	HISI_PTT_4DW_HEAD2,
57	HISI_PTT_4DW_HEAD3,
58	HISI_PTT_4DW_TYPE_MAX
59};
60
61static const char * const hisi_ptt_8dw_pkt_field_name[] = {
62	[HISI_PTT_8DW_PREFIX]	= "Prefix",
63	[HISI_PTT_8DW_HEAD0]	= "Header DW0",
64	[HISI_PTT_8DW_HEAD1]	= "Header DW1",
65	[HISI_PTT_8DW_HEAD2]	= "Header DW2",
66	[HISI_PTT_8DW_HEAD3]	= "Header DW3",
67	[HISI_PTT_8DW_TIME]	= "Time"
68};
69
70static const char * const hisi_ptt_4dw_pkt_field_name[] = {
71	[HISI_PTT_4DW_HEAD1]	= "Header DW1",
72	[HISI_PTT_4DW_HEAD2]	= "Header DW2",
73	[HISI_PTT_4DW_HEAD3]	= "Header DW3",
74};
75
76union hisi_ptt_4dw {
77	struct {
78		uint32_t format : 2;
79		uint32_t type : 5;
80		uint32_t t9 : 1;
81		uint32_t t8 : 1;
82		uint32_t th : 1;
83		uint32_t so : 1;
84		uint32_t len : 10;
85		uint32_t time : 11;
86	};
87	uint32_t value;
88};
89
90static void hisi_ptt_print_pkt(const unsigned char *buf, int pos, const char *desc)
91{
92	const char *color = PERF_COLOR_BLUE;
93	int i;
94
95	printf(".");
96	color_fprintf(stdout, color, "  %08x: ", pos);
97	for (i = 0; i < HISI_PTT_FIELD_LENTH; i++)
98		color_fprintf(stdout, color, "%02x ", buf[pos + i]);
99	for (i = 0; i < HISI_PTT_MAX_SPACE_LEN; i++)
100		color_fprintf(stdout, color, "   ");
101	color_fprintf(stdout, color, "  %s\n", desc);
102}
103
104static int hisi_ptt_8dw_kpt_desc(const unsigned char *buf, int pos)
105{
106	int i;
107
108	for (i = 0; i < HISI_PTT_8DW_TYPE_MAX; i++) {
109		/* Do not show 8DW check field and reserved fields */
110		if (i == HISI_PTT_8DW_CHK_AND_RSV0 || i == HISI_PTT_8DW_RSV1) {
111			pos += HISI_PTT_FIELD_LENTH;
112			continue;
113		}
114
115		hisi_ptt_print_pkt(buf, pos, hisi_ptt_8dw_pkt_field_name[i]);
116		pos += HISI_PTT_FIELD_LENTH;
117	}
118
119	return hisi_ptt_pkt_size[HISI_PTT_8DW_PKT];
120}
121
122static void hisi_ptt_4dw_print_dw0(const unsigned char *buf, int pos)
123{
124	const char *color = PERF_COLOR_BLUE;
125	union hisi_ptt_4dw dw0;
126	int i;
127
128	dw0.value = *(uint32_t *)(buf + pos);
129	printf(".");
130	color_fprintf(stdout, color, "  %08x: ", pos);
131	for (i = 0; i < HISI_PTT_FIELD_LENTH; i++)
132		color_fprintf(stdout, color, "%02x ", buf[pos + i]);
133	for (i = 0; i < HISI_PTT_MAX_SPACE_LEN; i++)
134		color_fprintf(stdout, color, "   ");
135
136	color_fprintf(stdout, color,
137		      "  %s %x %s %x %s %x %s %x %s %x %s %x %s %x %s %x\n",
138		      "Format", dw0.format, "Type", dw0.type, "T9", dw0.t9,
139		      "T8", dw0.t8, "TH", dw0.th, "SO", dw0.so, "Length",
140		      dw0.len, "Time", dw0.time);
141}
142
143static int hisi_ptt_4dw_kpt_desc(const unsigned char *buf, int pos)
144{
145	int i;
146
147	hisi_ptt_4dw_print_dw0(buf, pos);
148	pos += HISI_PTT_FIELD_LENTH;
149
150	for (i = 0; i < HISI_PTT_4DW_TYPE_MAX; i++) {
151		hisi_ptt_print_pkt(buf, pos, hisi_ptt_4dw_pkt_field_name[i]);
152		pos += HISI_PTT_FIELD_LENTH;
153	}
154
155	return hisi_ptt_pkt_size[HISI_PTT_4DW_PKT];
156}
157
158int hisi_ptt_pkt_desc(const unsigned char *buf, int pos, enum hisi_ptt_pkt_type type)
159{
160	if (type == HISI_PTT_8DW_PKT)
161		return hisi_ptt_8dw_kpt_desc(buf, pos);
162
163	return hisi_ptt_4dw_kpt_desc(buf, pos);
164}
165