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linux/net/mac80211/tests/tpe.c
Johannes Berg 39dc8b8ea3 wifi: mac80211: pass parsed TPE data to drivers 
Instead of passing the full TPE elements, in all their glory
and mixed up data formats for HE backward compatibility, parse
them fully into the right values, and pass that to the drivers.

Also introduce proper validation already in mac80211, so that
drivers don't need to do it, and parse the EHT portions.

The code now passes the values in the right order according to
the channel used by an interface, which could also be a subset
of the data advertised by the AP, if we couldn't connect with
the full bandwidth (for whatever reason.)

Also add kunit tests for the more complicated bits of it.

Reviewed-by: Miriam Rachel Korenblit <miriam.rachel.korenblit@intel.com>
Acked-by: Kalle Valo <kvalo@kernel.org>
Link: https://msgid.link/20240506214536.2aa839969b60.I265b28209e0b29772b2f125f7f83de44a4da877b@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2024-05-23 10:35:04 +02:00

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// SPDX-License-Identifier: GPL-2.0-only
/*
* KUnit tests for TPE element handling
*
* Copyright (C) 2024 Intel Corporation
*/
#include <kunit/test.h>
#include "../ieee80211_i.h"
MODULE_IMPORT_NS(EXPORTED_FOR_KUNIT_TESTING);
static struct ieee80211_channel chan6g_1 = {
.band = NL80211_BAND_6GHZ,
.center_freq = 5955,
};
static struct ieee80211_channel chan6g_33 = {
.band = NL80211_BAND_6GHZ,
.center_freq = 6115,
};
static struct ieee80211_channel chan6g_61 = {
.band = NL80211_BAND_6GHZ,
.center_freq = 6255,
};
static const struct subchan_test_case {
const char *desc;
struct cfg80211_chan_def c;
u8 n;
int expect;
} subchan_offset_cases[] = {
{
.desc = "identical 20 MHz",
.c.width = NL80211_CHAN_WIDTH_20,
.c.chan = &chan6g_1,
.c.center_freq1 = 5955,
.n = 1,
.expect = 0,
},
{
.desc = "identical 40 MHz",
.c.width = NL80211_CHAN_WIDTH_40,
.c.chan = &chan6g_1,
.c.center_freq1 = 5965,
.n = 2,
.expect = 0,
},
{
.desc = "identical 80+80 MHz",
/* not really is valid? doesn't matter for the test */
.c.width = NL80211_CHAN_WIDTH_80P80,
.c.chan = &chan6g_1,
.c.center_freq1 = 5985,
.c.center_freq2 = 6225,
.n = 16,
.expect = 0,
},
{
.desc = "identical 320 MHz",
.c.width = NL80211_CHAN_WIDTH_320,
.c.chan = &chan6g_1,
.c.center_freq1 = 6105,
.n = 16,
.expect = 0,
},
{
.desc = "lower 160 MHz of 320 MHz",
.c.width = NL80211_CHAN_WIDTH_320,
.c.chan = &chan6g_1,
.c.center_freq1 = 6105,
.n = 8,
.expect = 0,
},
{
.desc = "upper 160 MHz of 320 MHz",
.c.width = NL80211_CHAN_WIDTH_320,
.c.chan = &chan6g_61,
.c.center_freq1 = 6105,
.n = 8,
.expect = 8,
},
{
.desc = "upper 160 MHz of 320 MHz, go to 40",
.c.width = NL80211_CHAN_WIDTH_320,
.c.chan = &chan6g_61,
.c.center_freq1 = 6105,
.n = 2,
.expect = 8 + 4 + 2,
},
{
.desc = "secondary 80 above primary in 80+80 MHz",
/* not really is valid? doesn't matter for the test */
.c.width = NL80211_CHAN_WIDTH_80P80,
.c.chan = &chan6g_1,
.c.center_freq1 = 5985,
.c.center_freq2 = 6225,
.n = 4,
.expect = 0,
},
{
.desc = "secondary 80 below primary in 80+80 MHz",
/* not really is valid? doesn't matter for the test */
.c.width = NL80211_CHAN_WIDTH_80P80,
.c.chan = &chan6g_61,
.c.center_freq1 = 6225,
.c.center_freq2 = 5985,
.n = 4,
.expect = 4,
},
{
.desc = "secondary 80 below primary in 80+80 MHz, go to 20",
/* not really is valid? doesn't matter for the test */
.c.width = NL80211_CHAN_WIDTH_80P80,
.c.chan = &chan6g_61,
.c.center_freq1 = 6225,
.c.center_freq2 = 5985,
.n = 1,
.expect = 7,
},
};
KUNIT_ARRAY_PARAM_DESC(subchan_offset, subchan_offset_cases, desc);
static void subchan_offset(struct kunit *test)
{
const struct subchan_test_case *params = test->param_value;
int offset;
KUNIT_ASSERT_EQ(test, cfg80211_chandef_valid(&params->c), true);
offset = ieee80211_calc_chandef_subchan_offset(&params->c, params->n);
KUNIT_EXPECT_EQ(test, params->expect, offset);
}
static const struct psd_reorder_test_case {
const char *desc;
struct cfg80211_chan_def ap, used;
struct ieee80211_parsed_tpe_psd psd, out;
} psd_reorder_cases[] = {
{
.desc = "no changes, 320 MHz",
.ap.width = NL80211_CHAN_WIDTH_320,
.ap.chan = &chan6g_1,
.ap.center_freq1 = 6105,
.used.width = NL80211_CHAN_WIDTH_320,
.used.chan = &chan6g_1,
.used.center_freq1 = 6105,
.psd.valid = true,
.psd.count = 16,
.psd.n = 8,
.psd.power = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 },
.out.valid = true,
.out.count = 16,
.out.n = 8,
.out.power = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 },
},
{
.desc = "no changes, 320 MHz, 160 MHz used, n=0",
.ap.width = NL80211_CHAN_WIDTH_320,
.ap.chan = &chan6g_1,
.ap.center_freq1 = 6105,
.used.width = NL80211_CHAN_WIDTH_160,
.used.chan = &chan6g_1,
.used.center_freq1 = 6025,
.psd.valid = true,
.psd.count = 16,
.psd.n = 0,
.psd.power = { 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, },
.out.valid = true,
.out.count = 8,
.out.n = 0,
.out.power = { 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, },
},
{
.desc = "320 MHz, HE is 80, used 160, all lower",
.ap.width = NL80211_CHAN_WIDTH_320,
.ap.chan = &chan6g_1,
.ap.center_freq1 = 6105,
.used.width = NL80211_CHAN_WIDTH_160,
.used.chan = &chan6g_1,
.used.center_freq1 = 6025,
.psd.valid = true,
.psd.count = 16,
.psd.n = 4,
.psd.power = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 },
.out.valid = true,
.out.count = 8,
.out.n = 4,
.out.power = { 0, 1, 2, 3, 4, 5, 6, 7, 127, 127, 127, 127, 127, 127, 127, 127},
},
{
.desc = "320 MHz, HE is 80, used 160, all upper",
/*
* EHT: | | | | | | | | | | | | | | | | |
* HE: | | | | |
* used: | | | | | | | | |
*/
.ap.width = NL80211_CHAN_WIDTH_320,
.ap.chan = &chan6g_61,
.ap.center_freq1 = 6105,
.used.width = NL80211_CHAN_WIDTH_160,
.used.chan = &chan6g_61,
.used.center_freq1 = 6185,
.psd.valid = true,
.psd.count = 16,
.psd.n = 4,
.psd.power = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 },
.out.valid = true,
.out.count = 8,
.out.n = 4,
.out.power = { 12, 13, 14, 15, 0, 1, 2, 3, 127, 127, 127, 127, 127, 127, 127, 127},
},
{
.desc = "320 MHz, HE is 80, used 160, split",
/*
* EHT: | | | | | | | | | | | | | | | | |
* HE: | | | | |
* used: | | | | | | | | |
*/
.ap.width = NL80211_CHAN_WIDTH_320,
.ap.chan = &chan6g_33,
.ap.center_freq1 = 6105,
.used.width = NL80211_CHAN_WIDTH_160,
.used.chan = &chan6g_33,
.used.center_freq1 = 6185,
.psd.valid = true,
.psd.count = 16,
.psd.n = 4,
.psd.power = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 },
.out.valid = true,
.out.count = 8,
.out.n = 4,
.out.power = { 0, 1, 2, 3, 12, 13, 14, 15, 127, 127, 127, 127, 127, 127, 127, 127},
},
};
KUNIT_ARRAY_PARAM_DESC(psd_reorder, psd_reorder_cases, desc);
static void psd_reorder(struct kunit *test)
{
const struct psd_reorder_test_case *params = test->param_value;
struct ieee80211_parsed_tpe_psd tmp = params->psd;
KUNIT_ASSERT_EQ(test, cfg80211_chandef_valid(&params->ap), true);
KUNIT_ASSERT_EQ(test, cfg80211_chandef_valid(&params->used), true);
ieee80211_rearrange_tpe_psd(&tmp, &params->ap, &params->used);
KUNIT_EXPECT_MEMEQ(test, &tmp, &params->out, sizeof(tmp));
}
static struct kunit_case tpe_test_cases[] = {
KUNIT_CASE_PARAM(subchan_offset, subchan_offset_gen_params),
KUNIT_CASE_PARAM(psd_reorder, psd_reorder_gen_params),
{}
};
static struct kunit_suite tpe = {
.name = "mac80211-tpe",
.test_cases = tpe_test_cases,
};
kunit_test_suite(tpe);
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