1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
|
/*
* The PCI Utilities -- Display/save margining results
*
* Copyright (c) 2023 KNS Group LLC (YADRO)
*
* Can be freely distributed and used under the terms of the GNU GPL v2+.
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include "lmr.h"
enum lane_rating {
BAD = 0,
OKAY,
PERFECT,
WEIRD,
INIT,
};
static char *const grades[] = { "Bad", "Okay", "Perfect", "Weird" };
static char *const sts_strings[] = { "NAK", "LIM", "THR" };
static const double ui[] = { 62.5 / 100, 31.25 / 100 };
static enum lane_rating
rate_lane(double value, double min, double recommended, enum lane_rating cur_rate)
{
enum lane_rating res = PERFECT;
if (value < recommended)
res = OKAY;
if (value < min)
res = BAD;
if (cur_rate == INIT)
return res;
if (res < cur_rate)
return res;
else
return cur_rate;
}
static bool
check_recv_weird(struct margin_results *results, double tim_min, double volt_min)
{
bool result = true;
struct margin_res_lane *lane;
for (int i = 0; i < results->lanes_n && result; i++)
{
lane = &(results->lanes[i]);
if (lane->steps[TIM_LEFT] * results->tim_coef != tim_min)
result = false;
if (results->params.ind_left_right_tim
&& lane->steps[TIM_RIGHT] * results->tim_coef != tim_min)
result = false;
if (results->params.volt_support)
{
if (lane->steps[VOLT_UP] * results->volt_coef != volt_min)
result = false;
if (results->params.ind_up_down_volt
&& lane->steps[VOLT_DOWN] * results->volt_coef != volt_min)
result = false;
}
}
return result;
}
void
margin_results_print_brief(struct margin_results *results, u8 recvs_n)
{
struct margin_res_lane *lane;
struct margin_results *res;
struct margin_params params;
enum lane_rating lane_rating;
u8 link_speed;
char *no_test_msgs[] = { "",
"Margining Ready bit is Clear",
"Error during caps reading",
"Margining prerequisites are not satisfied (16/32 GT/s, D0)",
"Invalid lanes specified with arguments",
"Invalid receivers specified with arguments",
"Couldn't disable ASPM" };
for (int i = 0; i < recvs_n; i++)
{
res = &(results[i]);
params = res->params;
link_speed = res->link_speed - 4;
if (res->test_status != MARGIN_TEST_OK)
{
if (res->test_status < MARGIN_TEST_PREREQS)
printf("Rx(%X) -", 10 + res->recvn - 1);
printf(" Couldn't run test (%s)\n\n", no_test_msgs[res->test_status]);
continue;
}
if (res->lane_reversal)
printf("Rx(%X) - Lane Reversal\n", 10 + res->recvn - 1);
if (check_recv_weird(res, MARGIN_TIM_MIN, MARGIN_VOLT_MIN))
lane_rating = WEIRD;
else
lane_rating = INIT;
for (u8 j = 0; j < res->lanes_n; j++)
{
lane = &(res->lanes[j]);
double left_ui = lane->steps[TIM_LEFT] * res->tim_coef;
double right_ui = lane->steps[TIM_RIGHT] * res->tim_coef;
double up_volt = lane->steps[VOLT_UP] * res->volt_coef;
double down_volt = lane->steps[VOLT_DOWN] * res->volt_coef;
if (lane_rating != WEIRD)
{
lane_rating = rate_lane(left_ui, MARGIN_TIM_MIN, MARGIN_TIM_RECOMMEND, INIT);
if (params.ind_left_right_tim)
lane_rating
= rate_lane(right_ui, MARGIN_TIM_MIN, MARGIN_TIM_RECOMMEND, lane_rating);
if (params.volt_support)
{
lane_rating = rate_lane(up_volt, MARGIN_VOLT_MIN, MARGIN_VOLT_MIN, lane_rating);
if (params.ind_up_down_volt)
lane_rating
= rate_lane(down_volt, MARGIN_VOLT_MIN, MARGIN_VOLT_MIN, lane_rating);
}
}
printf("Rx(%X) Lane %2d - %s\t", 10 + res->recvn - 1, lane->lane, grades[lane_rating]);
if (params.ind_left_right_tim)
printf("L %4.1f%% UI - %5.2fps - %2dst %s, R %4.1f%% UI - %5.2fps - %2dst %s", left_ui,
left_ui * ui[link_speed], lane->steps[TIM_LEFT],
sts_strings[lane->statuses[TIM_LEFT]], right_ui, right_ui * ui[link_speed],
lane->steps[TIM_RIGHT], sts_strings[lane->statuses[TIM_RIGHT]]);
else
printf("T %4.1f%% UI - %5.2fps - %2dst %s", left_ui, left_ui * ui[link_speed],
lane->steps[TIM_LEFT], sts_strings[lane->statuses[TIM_LEFT]]);
if (params.volt_support)
{
if (params.ind_up_down_volt)
printf(", U %5.1f mV - %3dst %s, D %5.1f mV - %3dst %s", up_volt,
lane->steps[VOLT_UP], sts_strings[lane->statuses[VOLT_UP]], down_volt,
lane->steps[VOLT_DOWN], sts_strings[lane->statuses[VOLT_DOWN]]);
else
printf(", V %5.1f mV - %3dst %s", up_volt, lane->steps[VOLT_UP],
sts_strings[lane->statuses[VOLT_UP]]);
}
printf("\n");
}
printf("\n");
}
}
|
