diff options
| -rw-r--r-- | lmr/lmr.h | 8 | ||||
| -rw-r--r-- | lmr/margin_results.c | 159 |
2 files changed, 167 insertions, 0 deletions
@@ -17,6 +17,10 @@ #define MARGIN_STEP_MS 1000 +#define MARGIN_TIM_MIN 20 +#define MARGIN_TIM_RECOMMEND 30 +#define MARGIN_VOLT_MIN 50 + /* PCI Device wrapper for margining functions */ struct margin_dev { struct pci_dev *dev; @@ -205,4 +209,8 @@ void margin_log_receiver(struct margin_recv *recv); /* Margining in progress log */ void margin_log_margining(struct margin_lanes_data arg); +/* margin_results */ + +void margin_results_print_brief(struct margin_results *results, u8 recvs_n); + #endif diff --git a/lmr/margin_results.c b/lmr/margin_results.c new file mode 100644 index 0000000..5ee065d --- /dev/null +++ b/lmr/margin_results.c @@ -0,0 +1,159 @@ +/* + * 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"); + } +} |