* with cfg80211.
*
* @center_freq: center frequency in MHz
+ * @freq_offset: offset from @center_freq, in KHz
* @hw_value: hardware-specific value for the channel
* @flags: channel flags from &enum ieee80211_channel_flags.
* @orig_flags: channel flags at registration time, used by regulatory
struct ieee80211_channel {
enum nl80211_band band;
u32 center_freq;
+ u16 freq_offset;
u16 hw_value;
u32 flags;
int max_antenna_gain;
* If edmg is requested (i.e. the .channels member is non-zero),
* chan will define the primary channel and all other
* parameters are ignored.
+ * @freq1_offset: offset from @center_freq1, in KHz
*/
struct cfg80211_chan_def {
struct ieee80211_channel *chan;
u32 center_freq1;
u32 center_freq2;
struct ieee80211_edmg edmg;
+ u16 freq1_offset;
};
/**
return (chandef1->chan == chandef2->chan &&
chandef1->width == chandef2->width &&
chandef1->center_freq1 == chandef2->center_freq1 &&
+ chandef1->freq1_offset == chandef2->freq1_offset &&
chandef1->center_freq2 == chandef2->center_freq2);
}
* cfg80211 offers a number of utility functions that can be useful.
*/
+/**
+ * ieee80211_channel_equal - compare two struct ieee80211_channel
+ *
+ * @a: 1st struct ieee80211_channel
+ * @b: 2nd struct ieee80211_channel
+ * Return: true if center frequency of @a == @b
+ */
+static inline bool
+ieee80211_channel_equal(struct ieee80211_channel *a,
+ struct ieee80211_channel *b)
+{
+ return (a->center_freq == b->center_freq &&
+ a->freq_offset == b->freq_offset);
+}
+
+/**
+ * ieee80211_channel_to_khz - convert ieee80211_channel to frequency in KHz
+ * @chan: struct ieee80211_channel to convert
+ * Return: The corresponding frequency (in KHz)
+ */
+static inline u32
+ieee80211_channel_to_khz(const struct ieee80211_channel *chan)
+{
+ return MHZ_TO_KHZ(chan->center_freq) + chan->freq_offset;
+}
+
+/**
+ * ieee80211_channel_to_freq_khz - convert channel number to frequency
+ * @chan: channel number
+ * @band: band, necessary due to channel number overlap
+ * Return: The corresponding frequency (in KHz), or 0 if the conversion failed.
+ */
+u32 ieee80211_channel_to_freq_khz(int chan, enum nl80211_band band);
+
/**
* ieee80211_channel_to_frequency - convert channel number to frequency
* @chan: channel number
* @band: band, necessary due to channel number overlap
* Return: The corresponding frequency (in MHz), or 0 if the conversion failed.
*/
-int ieee80211_channel_to_frequency(int chan, enum nl80211_band band);
+static inline int
+ieee80211_channel_to_frequency(int chan, enum nl80211_band band)
+{
+ return KHZ_TO_MHZ(ieee80211_channel_to_freq_khz(chan, band));
+}
+
+/**
+ * ieee80211_freq_khz_to_channel - convert frequency to channel number
+ * @freq: center frequency in KHz
+ * Return: The corresponding channel, or 0 if the conversion failed.
+ */
+int ieee80211_freq_khz_to_channel(u32 freq);
/**
* ieee80211_frequency_to_channel - convert frequency to channel number
- * @freq: center frequency
+ * @freq: center frequency in MHz
* Return: The corresponding channel, or 0 if the conversion failed.
*/
-int ieee80211_frequency_to_channel(int freq);
+static inline int
+ieee80211_frequency_to_channel(int freq)
+{
+ return ieee80211_freq_khz_to_channel(MHZ_TO_KHZ(freq));
+}
+
+/**
+ * ieee80211_get_channel_khz - get channel struct from wiphy for specified
+ * frequency
+ * @wiphy: the struct wiphy to get the channel for
+ * @freq: the center frequency (in KHz) of the channel
+ * Return: The channel struct from @wiphy at @freq.
+ */
+struct ieee80211_channel *
+ieee80211_get_channel_khz(struct wiphy *wiphy, u32 freq);
/**
* ieee80211_get_channel - get channel struct from wiphy for specified frequency
*
* @wiphy: the struct wiphy to get the channel for
- * @freq: the center frequency of the channel
- *
+ * @freq: the center frequency (in MHz) of the channel
* Return: The channel struct from @wiphy at @freq.
*/
-struct ieee80211_channel *ieee80211_get_channel(struct wiphy *wiphy, int freq);
+static inline struct ieee80211_channel *
+ieee80211_get_channel(struct wiphy *wiphy, int freq)
+{
+ return ieee80211_get_channel_khz(wiphy, MHZ_TO_KHZ(freq));
+}
/**
* ieee80211_get_response_rate - get basic rate for a given rate
bool ieee80211_chandef_to_operating_class(struct cfg80211_chan_def *chandef,
u8 *op_class);
+/**
+ * ieee80211_chandef_to_khz - convert chandef to frequency in KHz
+ *
+ * @chandef: the chandef to convert
+ *
+ * Returns the center frequency of chandef (1st segment) in KHz.
+ */
+static inline u32
+ieee80211_chandef_to_khz(const struct cfg80211_chan_def *chandef)
+{
+ return MHZ_TO_KHZ(chandef->center_freq1) + chandef->freq1_offset;
+}
+
/*
* cfg80211_tdls_oper_request - request userspace to perform TDLS operation
* @dev: the device on which the operation is requested
return;
chandef->chan = chan;
+ chandef->freq1_offset = chan->freq_offset;
chandef->center_freq2 = 0;
chandef->edmg.bw_config = 0;
chandef->edmg.channels = 0;
case NL80211_CHAN_WIDTH_10:
case NL80211_CHAN_WIDTH_20:
case NL80211_CHAN_WIDTH_20_NOHT:
- if (chandef->center_freq1 != control_freq)
+ if (ieee80211_chandef_to_khz(chandef) !=
+ ieee80211_channel_to_khz(chandef->chan))
return false;
if (chandef->center_freq2)
return false;
{
u32 start_freq;
- if (bandwidth <= 20)
+ bandwidth = MHZ_TO_KHZ(bandwidth);
+ if (bandwidth <= MHZ_TO_KHZ(20))
start_freq = center_freq;
else
- start_freq = center_freq - bandwidth/2 + 10;
+ start_freq = center_freq - bandwidth / 2 + MHZ_TO_KHZ(10);
return start_freq;
}
{
u32 end_freq;
- if (bandwidth <= 20)
+ bandwidth = MHZ_TO_KHZ(bandwidth);
+ if (bandwidth <= MHZ_TO_KHZ(20))
end_freq = center_freq;
else
- end_freq = center_freq + bandwidth/2 - 10;
+ end_freq = center_freq + bandwidth / 2 - MHZ_TO_KHZ(10);
return end_freq;
}
start_freq = cfg80211_get_start_freq(center_freq, bandwidth);
end_freq = cfg80211_get_end_freq(center_freq, bandwidth);
- for (freq = start_freq; freq <= end_freq; freq += 20) {
- c = ieee80211_get_channel(wiphy, freq);
+ for (freq = start_freq; freq <= end_freq; freq += MHZ_TO_KHZ(20)) {
+ c = ieee80211_get_channel_khz(wiphy, freq);
if (!c)
return -EINVAL;
return -EINVAL;
ret = cfg80211_get_chans_dfs_required(wiphy,
- chandef->center_freq1,
- width);
+ ieee80211_chandef_to_khz(chandef),
+ width);
if (ret < 0)
return ret;
else if (ret > 0)
return 0;
ret = cfg80211_get_chans_dfs_required(wiphy,
- chandef->center_freq2,
- width);
+ MHZ_TO_KHZ(chandef->center_freq2),
+ width);
if (ret < 0)
return ret;
else if (ret > 0)
* DFS_AVAILABLE). Return number of usable channels
* (require CAC). Allow DFS and non-DFS channel mix.
*/
- for (freq = start_freq; freq <= end_freq; freq += 20) {
- c = ieee80211_get_channel(wiphy, freq);
+ for (freq = start_freq; freq <= end_freq; freq += MHZ_TO_KHZ(20)) {
+ c = ieee80211_get_channel_khz(wiphy, freq);
if (!c)
return -EINVAL;
if (width < 0)
return false;
- r1 = cfg80211_get_chans_dfs_usable(wiphy, chandef->center_freq1,
- width);
+ r1 = cfg80211_get_chans_dfs_usable(wiphy,
+ MHZ_TO_KHZ(chandef->center_freq1),
+ width);
if (r1 < 0)
return false;
case NL80211_CHAN_WIDTH_80P80:
WARN_ON(!chandef->center_freq2);
r2 = cfg80211_get_chans_dfs_usable(wiphy,
- chandef->center_freq2,
- width);
+ MHZ_TO_KHZ(chandef->center_freq2),
+ width);
if (r2 < 0)
return false;
break;
* If any channel in between is disabled or has not
* had gone through CAC return false
*/
- for (freq = start_freq; freq <= end_freq; freq += 20) {
- c = ieee80211_get_channel(wiphy, freq);
+ for (freq = start_freq; freq <= end_freq; freq += MHZ_TO_KHZ(20)) {
+ c = ieee80211_get_channel_khz(wiphy, freq);
if (!c)
return false;
if (width < 0)
return false;
- r = cfg80211_get_chans_dfs_available(wiphy, chandef->center_freq1,
+ r = cfg80211_get_chans_dfs_available(wiphy,
+ MHZ_TO_KHZ(chandef->center_freq1),
width);
/* If any of channels unavailable for cf1 just return */
case NL80211_CHAN_WIDTH_80P80:
WARN_ON(!chandef->center_freq2);
r = cfg80211_get_chans_dfs_available(wiphy,
- chandef->center_freq2,
- width);
+ MHZ_TO_KHZ(chandef->center_freq2),
+ width);
break;
default:
WARN_ON(chandef->center_freq2);
start_freq = cfg80211_get_start_freq(center_freq, bandwidth);
end_freq = cfg80211_get_end_freq(center_freq, bandwidth);
- for (freq = start_freq; freq <= end_freq; freq += 20) {
- c = ieee80211_get_channel(wiphy, freq);
+ for (freq = start_freq; freq <= end_freq; freq += MHZ_TO_KHZ(20)) {
+ c = ieee80211_get_channel_khz(wiphy, freq);
if (!c)
return 0;
return 0;
t1 = cfg80211_get_chans_dfs_cac_time(wiphy,
- chandef->center_freq1,
+ MHZ_TO_KHZ(chandef->center_freq1),
width);
if (!chandef->center_freq2)
return t1;
t2 = cfg80211_get_chans_dfs_cac_time(wiphy,
- chandef->center_freq2,
+ MHZ_TO_KHZ(chandef->center_freq2),
width);
return max(t1, t2);
start_freq = cfg80211_get_start_freq(center_freq, bandwidth);
end_freq = cfg80211_get_end_freq(center_freq, bandwidth);
- for (freq = start_freq; freq <= end_freq; freq += 20) {
- c = ieee80211_get_channel(wiphy, freq);
+ for (freq = start_freq; freq <= end_freq; freq += MHZ_TO_KHZ(20)) {
+ c = ieee80211_get_channel_khz(wiphy, freq);
if (!c || c->flags & prohibited_flags)
return false;
}
prohibited_flags |= IEEE80211_CHAN_NO_OFDM;
- if (!cfg80211_secondary_chans_ok(wiphy, chandef->center_freq1,
+ if (!cfg80211_secondary_chans_ok(wiphy,
+ ieee80211_chandef_to_khz(chandef),
width, prohibited_flags))
return false;
if (!chandef->center_freq2)
return true;
- return cfg80211_secondary_chans_ok(wiphy, chandef->center_freq2,
+ return cfg80211_secondary_chans_ok(wiphy,
+ MHZ_TO_KHZ(chandef->center_freq2),
width, prohibited_flags);
}
EXPORT_SYMBOL(cfg80211_chandef_usable);
const struct ieee80211_channel *chan)
{
const struct ieee80211_freq_range *freq_range = NULL;
- u32 max_bandwidth_khz, bw_flags = 0;
+ u32 max_bandwidth_khz, center_freq_khz, bw_flags = 0;
freq_range = ®_rule->freq_range;
max_bandwidth_khz = freq_range->max_bandwidth_khz;
+ center_freq_khz = ieee80211_channel_to_khz(chan);
/* Check if auto calculation requested */
if (reg_rule->flags & NL80211_RRF_AUTO_BW)
max_bandwidth_khz = reg_get_max_bandwidth(regd, reg_rule);
/* If we get a reg_rule we can assume that at least 5Mhz fit */
if (!cfg80211_does_bw_fit_range(freq_range,
- MHZ_TO_KHZ(chan->center_freq),
+ center_freq_khz,
MHZ_TO_KHZ(10)))
bw_flags |= IEEE80211_CHAN_NO_10MHZ;
if (!cfg80211_does_bw_fit_range(freq_range,
- MHZ_TO_KHZ(chan->center_freq),
+ center_freq_khz,
MHZ_TO_KHZ(20)))
bw_flags |= IEEE80211_CHAN_NO_20MHZ;
flags = chan->orig_flags;
- reg_rule = freq_reg_info(wiphy, MHZ_TO_KHZ(chan->center_freq));
+ reg_rule = freq_reg_info(wiphy, ieee80211_channel_to_khz(chan));
if (IS_ERR(reg_rule)) {
/*
* We will disable all channels that do not match our
if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER &&
request_wiphy && request_wiphy == wiphy &&
request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) {
- pr_debug("Disabling freq %d MHz for good\n",
- chan->center_freq);
+ pr_debug("Disabling freq %d.%03d MHz for good\n",
+ chan->center_freq, chan->freq_offset);
chan->orig_flags |= IEEE80211_CHAN_DISABLED;
chan->flags = chan->orig_flags;
} else {
- pr_debug("Disabling freq %d MHz\n",
- chan->center_freq);
+ pr_debug("Disabling freq %d.%03d MHz\n",
+ chan->center_freq, chan->freq_offset);
chan->flags |= IEEE80211_CHAN_DISABLED;
}
return;
sband = wiphy->bands[reg_beacon->chan.band];
chan = &sband->channels[chan_idx];
- if (likely(chan->center_freq != reg_beacon->chan.center_freq))
+ if (likely(!ieee80211_channel_equal(chan, ®_beacon->chan)))
return;
if (chan->beacon_found)
u32 bw_flags = 0;
const struct ieee80211_reg_rule *reg_rule = NULL;
const struct ieee80211_power_rule *power_rule = NULL;
- u32 bw;
+ u32 bw, center_freq_khz;
+ center_freq_khz = ieee80211_channel_to_khz(chan);
for (bw = MHZ_TO_KHZ(20); bw >= min_bw; bw = bw / 2) {
- reg_rule = freq_reg_info_regd(MHZ_TO_KHZ(chan->center_freq),
- regd, bw);
+ reg_rule = freq_reg_info_regd(center_freq_khz, regd, bw);
if (!IS_ERR(reg_rule))
break;
}
if (IS_ERR_OR_NULL(reg_rule)) {
- pr_debug("Disabling freq %d MHz as custom regd has no rule that fits it\n",
- chan->center_freq);
+ pr_debug("Disabling freq %d.%03d MHz as custom regd has no rule that fits it\n",
+ chan->center_freq, chan->freq_offset);
if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) {
chan->flags |= IEEE80211_CHAN_DISABLED;
} else {
struct reg_beacon *pending_beacon;
list_for_each_entry(pending_beacon, ®_pending_beacons, list)
- if (beacon_chan->center_freq ==
- pending_beacon->chan.center_freq)
+ if (ieee80211_channel_equal(beacon_chan,
+ &pending_beacon->chan))
return true;
return false;
}
if (!reg_beacon)
return -ENOMEM;
- pr_debug("Found new beacon on frequency: %d MHz (Ch %d) on %s\n",
- beacon_chan->center_freq,
- ieee80211_frequency_to_channel(beacon_chan->center_freq),
+ pr_debug("Found new beacon on frequency: %d.%03d MHz (Ch %d) on %s\n",
+ beacon_chan->center_freq, beacon_chan->freq_offset,
+ ieee80211_freq_khz_to_channel(
+ ieee80211_channel_to_khz(beacon_chan)),
wiphy_name(wiphy));
memcpy(®_beacon->chan, beacon_chan,
return channel;
}
- freq = ieee80211_channel_to_frequency(channel_number, channel->band);
- alt_channel = ieee80211_get_channel(wiphy, freq);
+ freq = ieee80211_channel_to_freq_khz(channel_number, channel->band);
+ alt_channel = ieee80211_get_channel_khz(wiphy, freq);
if (!alt_channel) {
if (channel->band == NL80211_BAND_2GHZ) {
/*
} while (0)
#define CHAN_ENTRY __field(enum nl80211_band, band) \
- __field(u32, center_freq)
+ __field(u32, center_freq) \
+ __field(u16, freq_offset)
#define CHAN_ASSIGN(chan) \
do { \
if (chan) { \
__entry->band = chan->band; \
__entry->center_freq = chan->center_freq; \
+ __entry->freq_offset = chan->freq_offset; \
} else { \
__entry->band = 0; \
__entry->center_freq = 0; \
+ __entry->freq_offset = 0; \
} \
} while (0)
-#define CHAN_PR_FMT "band: %d, freq: %u"
-#define CHAN_PR_ARG __entry->band, __entry->center_freq
+#define CHAN_PR_FMT "band: %d, freq: %u.%03u"
+#define CHAN_PR_ARG __entry->band, __entry->center_freq, __entry->freq_offset
#define CHAN_DEF_ENTRY __field(enum nl80211_band, band) \
__field(u32, control_freq) \
+ __field(u32, freq_offset) \
__field(u32, width) \
__field(u32, center_freq1) \
+ __field(u32, freq1_offset) \
__field(u32, center_freq2)
#define CHAN_DEF_ASSIGN(chandef) \
do { \
__entry->band = (chandef)->chan->band; \
__entry->control_freq = \
(chandef)->chan->center_freq; \
+ __entry->freq_offset = \
+ (chandef)->chan->freq_offset; \
__entry->width = (chandef)->width; \
__entry->center_freq1 = (chandef)->center_freq1;\
+ __entry->freq1_offset = (chandef)->freq1_offset;\
__entry->center_freq2 = (chandef)->center_freq2;\
} else { \
__entry->band = 0; \
__entry->control_freq = 0; \
+ __entry->freq_offset = 0; \
__entry->width = 0; \
__entry->center_freq1 = 0; \
+ __entry->freq1_offset = 0; \
__entry->center_freq2 = 0; \
} \
} while (0)
#define CHAN_DEF_PR_FMT \
- "band: %d, control freq: %u, width: %d, cf1: %u, cf2: %u"
+ "band: %d, control freq: %u.%03u, width: %d, cf1: %u.%03u, cf2: %u"
#define CHAN_DEF_PR_ARG __entry->band, __entry->control_freq, \
- __entry->width, __entry->center_freq1, \
+ __entry->freq_offset, __entry->width, \
+ __entry->center_freq1, __entry->freq1_offset, \
__entry->center_freq2
#define SINFO_ENTRY __field(int, generation) \
}
EXPORT_SYMBOL(ieee80211_mandatory_rates);
-int ieee80211_channel_to_frequency(int chan, enum nl80211_band band)
+u32 ieee80211_channel_to_freq_khz(int chan, enum nl80211_band band)
{
/* see 802.11 17.3.8.3.2 and Annex J
* there are overlapping channel numbers in 5GHz and 2GHz bands */
switch (band) {
case NL80211_BAND_2GHZ:
if (chan == 14)
- return 2484;
+ return MHZ_TO_KHZ(2484);
else if (chan < 14)
- return 2407 + chan * 5;
+ return MHZ_TO_KHZ(2407 + chan * 5);
break;
case NL80211_BAND_5GHZ:
if (chan >= 182 && chan <= 196)
- return 4000 + chan * 5;
+ return MHZ_TO_KHZ(4000 + chan * 5);
else
- return 5000 + chan * 5;
+ return MHZ_TO_KHZ(5000 + chan * 5);
break;
case NL80211_BAND_6GHZ:
/* see 802.11ax D4.1 27.3.22.2 */
break;
case NL80211_BAND_60GHZ:
if (chan < 7)
- return 56160 + chan * 2160;
+ return MHZ_TO_KHZ(56160 + chan * 2160);
break;
default:
;
}
return 0; /* not supported */
}
-EXPORT_SYMBOL(ieee80211_channel_to_frequency);
+EXPORT_SYMBOL(ieee80211_channel_to_freq_khz);
-int ieee80211_frequency_to_channel(int freq)
+int ieee80211_freq_khz_to_channel(u32 freq)
{
+ /* TODO: just handle MHz for now */
+ freq = KHZ_TO_MHZ(freq);
+
/* see 802.11 17.3.8.3.2 and Annex J */
if (freq == 2484)
return 14;
else
return 0;
}
-EXPORT_SYMBOL(ieee80211_frequency_to_channel);
+EXPORT_SYMBOL(ieee80211_freq_khz_to_channel);
-struct ieee80211_channel *ieee80211_get_channel(struct wiphy *wiphy, int freq)
+struct ieee80211_channel *ieee80211_get_channel_khz(struct wiphy *wiphy,
+ u32 freq)
{
enum nl80211_band band;
struct ieee80211_supported_band *sband;
continue;
for (i = 0; i < sband->n_channels; i++) {
- if (sband->channels[i].center_freq == freq)
- return &sband->channels[i];
+ struct ieee80211_channel *chan = &sband->channels[i];
+
+ if (ieee80211_channel_to_khz(chan) == freq)
+ return chan;
}
}
return NULL;
}
-EXPORT_SYMBOL(ieee80211_get_channel);
+EXPORT_SYMBOL(ieee80211_get_channel_khz);
static void set_mandatory_flags_band(struct ieee80211_supported_band *sband)
{
projects / linux.git / commitdiff