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-rw-r--r--lmr/margin_results.c283
1 files changed, 283 insertions, 0 deletions
diff --git a/lmr/margin_results.c b/lmr/margin_results.c
new file mode 100644
index 0000000..4d28f04
--- /dev/null
+++ b/lmr/margin_results.c
@@ -0,0 +1,283 @@
+/*
+ * 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 (!res->tim_off_reported)
+ printf("Rx(%X) - Attention: Vendor chose not to report the Max Timing Offset.\n"
+ "Utility used its max possible value (50%% UI) for calculations of %% UI and ps.\n"
+ "Keep in mind that for timing results of this receiver only steps values are "
+ "reliable.\n\n",
+ 10 + res->recvn - 1);
+ if (params.volt_support && !res->volt_off_reported)
+ printf("Rx(%X) - Attention: Vendor chose not to report the Max Voltage Offset.\n"
+ "Utility used its max possible value (500 mV) for calculations of mV.\n"
+ "Keep in mind that for voltage results of this receiver only steps values are "
+ "reliable.\n\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");
+ }
+}
+
+void
+margin_results_save_csv(struct margin_results *results, u8 recvs_n, char *dir,
+ struct pci_dev *up_port)
+{
+ char timestamp[64];
+ time_t tim = time(NULL);
+ strftime(timestamp, sizeof(timestamp), "%Y-%m-%dT%H:%M:%S", gmtime(&tim));
+
+ size_t pathlen = strlen(dir) + 128;
+ char *path = xmalloc(pathlen);
+ FILE *csv;
+
+ struct margin_res_lane *lane;
+ struct margin_results *res;
+ struct margin_params params;
+
+ enum lane_rating lane_rating;
+ u8 link_speed;
+
+ 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)
+ continue;
+ snprintf(path, pathlen, "%s/lmr_%0*x.%02x.%02x.%x_Rx%X_%s.csv", dir,
+ up_port->domain_16 == 0xffff ? 8 : 4, up_port->domain, up_port->bus, up_port->dev,
+ up_port->func, 10 + res->recvn - 1, timestamp);
+ csv = fopen(path, "w");
+ if (!csv)
+ die("Error while saving %s\n", path);
+
+ fprintf(csv, "Lane,Lane Status,Left %% UI,Left ps,Left Steps,Left Status,"
+ "Right %% UI,Right ps,Right Steps,Right Status,"
+ "Time %% UI,Time ps,Time Steps,Time Status,"
+ "Up mV,Up Steps,Up Status,Down mV,Down Steps,Down Status,"
+ "Voltage mV,Voltage Steps,Voltage Status\n");
+
+ if (check_recv_weird(res, MARGIN_TIM_MIN, MARGIN_VOLT_MIN))
+ lane_rating = WEIRD;
+ else
+ lane_rating = INIT;
+
+ for (int 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);
+ }
+ }
+
+ fprintf(csv, "%d,%s,", lane->lane, grades[lane_rating]);
+ if (params.ind_left_right_tim)
+ {
+ fprintf(csv, "%f,%f,%d,%s,%f,%f,%d,%s,NA,NA,NA,NA,", 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
+ {
+ for (int k = 0; k < 8; k++)
+ fprintf(csv, "NA,");
+ fprintf(csv, "%f,%f,%d,%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)
+ {
+ fprintf(csv, "%f,%d,%s,%f,%d,%s,NA,NA,NA\n", 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
+ {
+ for (int k = 0; k < 6; k++)
+ fprintf(csv, "NA,");
+ fprintf(csv, "%f,%d,%s\n", up_volt, lane->steps[VOLT_UP],
+ sts_strings[lane->statuses[VOLT_UP]]);
+ }
+ }
+ else
+ {
+ for (int k = 0; k < 8; k++)
+ fprintf(csv, "NA,");
+ fprintf(csv, "NA\n");
+ }
+ }
+ fclose(csv);
+ }
+ free(path);
+}
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