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// SPDX-License-Identifier: GPL-2.0-only
/*
* KUnit tests for channel helper functions
*
* Copyright (C) 2024 Intel Corporation
*/
#include <net/mac80211.h>
#include "../mvm.h"
#include <kunit/test.h>
MODULE_IMPORT_NS(EXPORTED_FOR_KUNIT_TESTING);
static struct ieee80211_channel chan_5ghz = {
.band = NL80211_BAND_5GHZ,
};
static struct ieee80211_channel chan_6ghz = {
.band = NL80211_BAND_6GHZ,
};
static struct ieee80211_channel chan_2ghz = {
.band = NL80211_BAND_2GHZ,
};
static struct iwl_mvm_phy_ctxt ctx = {};
static struct iwl_mvm_vif_link_info mvm_link = {
.phy_ctxt = &ctx,
.active = true
};
static struct cfg80211_bss bss = {};
static struct ieee80211_bss_conf link_conf = {.bss = &bss};
static const struct link_grading_case {
const char *desc;
const struct cfg80211_chan_def chandef;
s32 signal;
s16 channel_util;
int chan_load_by_us;
unsigned int grade;
} link_grading_cases[] = {
{
.desc = "UHB, RSSI below range, no factors",
.chandef = {
.chan = &chan_6ghz,
.width = NL80211_CHAN_WIDTH_20,
},
.signal = -100,
.grade = 177,
},
{
.desc = "LB, RSSI in range, no factors",
.chandef = {
.chan = &chan_2ghz,
.width = NL80211_CHAN_WIDTH_20,
},
.signal = -84,
.grade = 344,
},
{
.desc = "HB, RSSI above range, no factors",
.chandef = {
.chan = &chan_5ghz,
.width = NL80211_CHAN_WIDTH_20,
},
.signal = -50,
.grade = 3442,
},
{
.desc = "HB, BSS Load IE (20 percent), inactive link, no puncturing factor",
.chandef = {
.chan = &chan_5ghz,
.width = NL80211_CHAN_WIDTH_20,
},
.signal = -66,
.channel_util = 51,
.grade = 1836,
},
{
.desc = "LB, BSS Load IE (20 percent), active link, chan_load_by_us=10 percent. No puncturing factor",
.chandef = {
.chan = &chan_2ghz,
.width = NL80211_CHAN_WIDTH_20,
},
.signal = -61,
.channel_util = 51,
.chan_load_by_us = 10,
.grade = 2061,
},
{
.desc = "UHB, BSS Load IE (40 percent), active link, chan_load_by_us=50 (invalid) percent. No puncturing factor",
.chandef = {
.chan = &chan_6ghz,
.width = NL80211_CHAN_WIDTH_20,
},
.signal = -66,
.channel_util = 102,
.chan_load_by_us = 50,
.grade = 1552,
},
{ .desc = "HB, 80 MHz, no channel load factor, punctured percentage 0",
.chandef = {
.chan = &chan_5ghz,
.width = NL80211_CHAN_WIDTH_80,
.punctured = 0x0000
},
.signal = -72,
.grade = 1750,
},
{ .desc = "HB, 160 MHz, no channel load factor, punctured percentage 25",
.chandef = {
.chan = &chan_5ghz,
.width = NL80211_CHAN_WIDTH_160,
.punctured = 0x3
},
.signal = -72,
.grade = 1312,
},
{ .desc = "UHB, 320 MHz, no channel load factor, punctured percentage 12.5 (2/16)",
.chandef = {
.chan = &chan_6ghz,
.width = NL80211_CHAN_WIDTH_320,
.punctured = 0x3
},
.signal = -72,
.grade = 1806,
},
{ .desc = "HB, 160 MHz, channel load 20, channel load by us 10, punctured percentage 25",
.chandef = {
.chan = &chan_5ghz,
.width = NL80211_CHAN_WIDTH_160,
.punctured = 0x3
},
.channel_util = 51,
.chan_load_by_us = 10,
.signal = -72,
.grade = 1179,
},
};
KUNIT_ARRAY_PARAM_DESC(link_grading, link_grading_cases, desc)
static void setup_link_conf(struct kunit *test)
{
const struct link_grading_case *params = test->param_value;
size_t vif_size = sizeof(struct ieee80211_vif) +
sizeof(struct iwl_mvm_vif);
struct ieee80211_vif *vif = kunit_kzalloc(test, vif_size, GFP_KERNEL);
struct ieee80211_bss_load_elem *bss_load;
struct element *element;
size_t ies_size = sizeof(struct cfg80211_bss_ies) + sizeof(*bss_load) + sizeof(element);
struct cfg80211_bss_ies *ies;
struct iwl_mvm_vif *mvmvif;
KUNIT_ASSERT_NOT_NULL(test, vif);
mvmvif = iwl_mvm_vif_from_mac80211(vif);
if (params->chan_load_by_us > 0) {
ctx.channel_load_by_us = params->chan_load_by_us;
mvmvif->link[0] = &mvm_link;
}
link_conf.vif = vif;
link_conf.chanreq.oper = params->chandef;
bss.signal = DBM_TO_MBM(params->signal);
ies = kunit_kzalloc(test, ies_size, GFP_KERNEL);
KUNIT_ASSERT_NOT_NULL(test, ies);
ies->len = sizeof(*bss_load) + sizeof(struct element);
element = (void *)ies->data;
element->datalen = sizeof(*bss_load);
element->id = 11;
bss_load = (void *)element->data;
bss_load->channel_util = params->channel_util;
rcu_assign_pointer(bss.ies, ies);
}
static void test_link_grading(struct kunit *test)
{
const struct link_grading_case *params = test->param_value;
unsigned int ret;
setup_link_conf(test);
rcu_read_lock();
ret = iwl_mvm_get_link_grade(&link_conf);
rcu_read_unlock();
KUNIT_EXPECT_EQ(test, ret, params->grade);
kunit_kfree(test, link_conf.vif);
RCU_INIT_POINTER(bss.ies, NULL);
}
static struct kunit_case link_grading_test_cases[] = {
KUNIT_CASE_PARAM(test_link_grading, link_grading_gen_params),
{}
};
static struct kunit_suite link_grading = {
.name = "iwlmvm-link-grading",
.test_cases = link_grading_test_cases,
};
kunit_test_suite(link_grading);
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