/* given a chanspec and a string buffer, format the chanspec as a
* string, and return the original pointer a.
* Min buffer length must be CHANSPEC_STR_LEN.
* On error return NULL
*/
char *
wf_chspec_ntoa(chanspec_t chspec, char *buf)
{
const char *band, *bw, *sb;
uint channel;
band = "";
bw = "";
sb = "";
channel = CHSPEC_CHANNEL(chspec);
/* check for non-default band spec */
if ((CHSPEC_IS2G(chspec) && channel > CH_MAX_2G_CHANNEL) ||
(CHSPEC_IS5G(chspec) && channel <= CH_MAX_2G_CHANNEL))
band = (CHSPEC_IS2G(chspec)) ? "b" : "a";
if (CHSPEC_IS40(chspec)) {
if (CHSPEC_SB_UPPER(chspec)) {
sb = "u";
channel += CH_10MHZ_APART;
} else {
sb = "l";
channel -= CH_10MHZ_APART;
}
} else if (CHSPEC_IS10(chspec)) {
bw = "n";
}
/* Outputs a max of 6 chars including '\0' */
snprintf(buf, 6, "%d%s%s%s", channel, band, bw, sb);
return (buf);
}
char *
wf_chspec_ntoa(chanspec_t chspec, char *buf)
{
const char *band, *bw, *sb;
uint channel;
DHD_MYTRACE(("%s-%s\n", __FILE__, __FUNCTION__));
band = "";
bw = "";
sb = "";
channel = CHSPEC_CHANNEL(chspec);
if ((CHSPEC_IS2G(chspec) && channel > CH_MAX_2G_CHANNEL) ||
(CHSPEC_IS5G(chspec) && channel <= CH_MAX_2G_CHANNEL))
band = (CHSPEC_IS2G(chspec)) ? "b" : "a";
if (CHSPEC_IS40(chspec)) {
if (CHSPEC_SB_UPPER(chspec)) {
sb = "u";
channel += CH_10MHZ_APART;
} else {
sb = "l";
channel -= CH_10MHZ_APART;
}
} else if (CHSPEC_IS10(chspec)) {
bw = "n";
}
snprintf(buf, 6, "%d%s%s%s", channel, band, bw, sb);
return (buf);
}
int wlmEstimatedPowerGet(int *estPower, int chain)
{
tx_power_t power;
int mimo;
memset(&power, 0, sizeof(power));
if (wlu_get(irh, WLC_CURRENT_PWR, &power, sizeof(power)) < 0) {
printf("wlmEstimatedPowerGet: %s\n", wlmLastError());
return FALSE;
}
power.flags = dtoh32(power.flags);
power.chanspec = dtohchanspec(power.chanspec);
mimo = (power.flags & WL_TX_POWER_F_MIMO);
/* value returned is in units of quarter dBm, need to multiply by 250 to get milli-dBm */
if (mimo) {
*estPower = power.est_Pout[chain] * 250;
} else {
*estPower = power.est_Pout[0] * 250;
}
if (!mimo && CHSPEC_IS2G(power.chanspec)) {
*estPower = power.est_Pout_cck * 250;
}
return TRUE;
}
/* given a chanspec and a string buffer, format the chanspec as a
* string, and return the original pointer a.
* Min buffer length must be CHANSPEC_STR_LEN.
* On error return NULL
*/
char *
wf_chspec_ntoa(chanspec_t chspec, char *buf)
{
const char *band;
uint ctl_chan;
if (wf_chspec_malformed(chspec))
return NULL;
band = "";
/* check for non-default band spec */
if ((CHSPEC_IS2G(chspec) && CHSPEC_CHANNEL(chspec) > CH_MAX_2G_CHANNEL) ||
(CHSPEC_IS5G(chspec) && CHSPEC_CHANNEL(chspec) <= CH_MAX_2G_CHANNEL))
band = (CHSPEC_IS2G(chspec)) ? "2g" : "5g";
/* ctl channel */
ctl_chan = wf_chspec_ctlchan(chspec);
/* bandwidth and ctl sideband */
if (CHSPEC_IS20(chspec)) {
snprintf(buf, CHANSPEC_STR_LEN, "%s%d", band, ctl_chan);
} else if (!CHSPEC_IS8080(chspec)) {
const char *bw;
const char *sb = "";
bw = wf_chspec_bw_str[(chspec & WL_CHANSPEC_BW_MASK) >> WL_CHANSPEC_BW_SHIFT];
#ifdef CHANSPEC_NEW_40MHZ_FORMAT
/* ctl sideband string if needed for 2g 40MHz */
if (CHSPEC_IS40(chspec) && CHSPEC_IS2G(chspec)) {
sb = CHSPEC_SB_UPPER(chspec) ? "u" : "l";
}
snprintf(buf, CHANSPEC_STR_LEN, "%s%d/%s%s", band, ctl_chan, bw, sb);
#else
/* ctl sideband string instead of BW for 40MHz */
if (CHSPEC_IS40(chspec)) {
sb = CHSPEC_SB_UPPER(chspec) ? "u" : "l";
snprintf(buf, CHANSPEC_STR_LEN, "%s%d%s", band, ctl_chan, sb);
} else {
snprintf(buf, CHANSPEC_STR_LEN, "%s%d/%s", band, ctl_chan, bw);
}
#endif /* CHANSPEC_NEW_40MHZ_FORMAT */
} else {
char *
wf_chspec_ntoa(chanspec_t chspec, char *buf)
{
const char *band;
uint ctl_chan;
if (wf_chspec_malformed(chspec))
return NULL;
band = "";
if ((CHSPEC_IS2G(chspec) && CHSPEC_CHANNEL(chspec) > CH_MAX_2G_CHANNEL) ||
(CHSPEC_IS5G(chspec) && CHSPEC_CHANNEL(chspec) <= CH_MAX_2G_CHANNEL))
band = (CHSPEC_IS2G(chspec)) ? "2g" : "5g";
ctl_chan = wf_chspec_ctlchan(chspec);
if (CHSPEC_IS20(chspec)) {
snprintf(buf, CHANSPEC_STR_LEN, "%s%d", band, ctl_chan);
} else if (!CHSPEC_IS8080(chspec)) {
const char *bw;
const char *sb = "";
bw = wf_chspec_bw_str[(chspec & WL_CHANSPEC_BW_MASK) >> WL_CHANSPEC_BW_SHIFT];
#ifdef CHANSPEC_NEW_40MHZ_FORMAT
if (CHSPEC_IS40(chspec) && CHSPEC_IS2G(chspec)) {
sb = CHSPEC_SB_UPPER(chspec) ? "u" : "l";
}
snprintf(buf, CHANSPEC_STR_LEN, "%s%d/%s%s", band, ctl_chan, bw, sb);
#else
if (CHSPEC_IS40(chspec)) {
sb = CHSPEC_SB_UPPER(chspec) ? "u" : "l";
snprintf(buf, CHANSPEC_STR_LEN, "%s%d%s", band, ctl_chan, sb);
} else {
snprintf(buf, CHANSPEC_STR_LEN, "%s%d/%s", band, ctl_chan, bw);
}
#endif
} else {
/*
* Verify the chanspec is using a legal set of parameters, i.e. that the
* chanspec specified a band, bw, ctl_sb and channel and that the
* combination could be legal given any set of circumstances.
* RETURNS: true is the chanspec is malformed, false if it looks good.
*/
static bool brcms_c_chspec_malformed(u16 chanspec)
{
/* must be 2G or 5G band */
if (!CHSPEC_IS5G(chanspec) && !CHSPEC_IS2G(chanspec))
return true;
/* must be 20 or 40 bandwidth */
if (!CHSPEC_IS40(chanspec) && !CHSPEC_IS20(chanspec))
return true;
/* 20MHZ b/w must have no ctl sb, 40 must have a ctl sb */
if (CHSPEC_IS20(chanspec)) {
if (!CHSPEC_SB_NONE(chanspec))
return true;
} else if (!CHSPEC_SB_UPPER(chanspec) && !CHSPEC_SB_LOWER(chanspec)) {
return true;
}
return false;
}
/*
* Verify the chanspec is using a legal set of parameters, i.e. that the
* chanspec specified a band, bw, ctl_sb and channel and that the
* combination could be legal given any set of circumstances.
* RETURNS: TRUE is the chanspec is malformed, false if it looks good.
*/
bool
wf_chspec_malformed(chanspec_t chanspec)
{
/* must be 2G or 5G band */
if (!CHSPEC_IS5G(chanspec) && !CHSPEC_IS2G(chanspec))
return TRUE;
/* must be 20 or 40 bandwidth */
if (!CHSPEC_IS40(chanspec) && !CHSPEC_IS20(chanspec))
return TRUE;
/* 20MHZ b/w must have no ctl sb, 40 must have a ctl sb */
if (CHSPEC_IS20_UNCOND(chanspec)) {
if (!CHSPEC_SB_NONE(chanspec))
return TRUE;
} else {
if (!CHSPEC_SB_UPPER(chanspec) && !CHSPEC_SB_LOWER(chanspec))
return TRUE;
}
return FALSE;
}
bool
wf_chspec_malformed(chanspec_t chanspec)
{
if (!CHSPEC_IS5G(chanspec) && !CHSPEC_IS2G(chanspec))
return TRUE;
if (!CHSPEC_IS40(chanspec) && !CHSPEC_IS20(chanspec))
return TRUE;
if (CHSPEC_IS20(chanspec)) {
if (!CHSPEC_SB_NONE(chanspec))
return TRUE;
} else {
if (!CHSPEC_SB_UPPER(chanspec) && !CHSPEC_SB_LOWER(chanspec))
return TRUE;
}
return FALSE;
}
bool
wf_chspec_malformed(chanspec_t chanspec)
{
DHD_MYTRACE(("%s-%s\n", __FILE__, __FUNCTION__));
if (!CHSPEC_IS5G(chanspec) && !CHSPEC_IS2G(chanspec))
return TRUE;
if (!CHSPEC_IS40(chanspec) && !CHSPEC_IS20(chanspec))
return TRUE;
if (CHSPEC_IS20_UNCOND(chanspec)) {
if (!CHSPEC_SB_NONE(chanspec))
return TRUE;
} else {
if (!CHSPEC_SB_UPPER(chanspec) && !CHSPEC_SB_LOWER(chanspec))
return TRUE;
}
return FALSE;
}
int get_roam_channel_list(int target_chan,
chanspec_t *channels, const wlc_ssid_t *ssid, int ioctl_ver)
{
int i, n = 1;
uint band, band2G, band5G, bw;
#ifdef D11AC_IOTYPES
if (ioctl_ver == 1) {
/* legacy chanspec */
band2G = WL_LCHANSPEC_BAND_2G;
band5G = WL_LCHANSPEC_BAND_5G;
bw = WL_LCHANSPEC_BW_20 | WL_LCHANSPEC_CTL_SB_NONE;
} else {
band2G = WL_CHANSPEC_BAND_2G;
band5G = WL_CHANSPEC_BAND_5G;
bw = WL_CHANSPEC_BW_20;
}
#else
band2G = WL_CHANSPEC_BAND_2G;
band5G = WL_CHANSPEC_BAND_5G;
bw = WL_CHANSPEC_BW_20 | WL_CHANSPEC_CTL_SB_NONE;
#endif /* D11AC_IOTYPES */
if (target_chan <= 14)
band = band2G;
else
band = band5G;
*channels = (target_chan & WL_CHANSPEC_CHAN_MASK) | band | bw;
WL_DBG((" %s: %02d 0x%04X\n", __FUNCTION__, target_chan, *channels));
++channels;
#if defined(CUSTOMER_HW4) && defined(WES_SUPPORT)
if (roamscan_mode) {
for (i = 0; i < n_roam_cache; i++) {
if ((roam_cache[i].chanspec & WL_CHANSPEC_CHAN_MASK) != target_chan) {
*channels = roam_cache[i].chanspec & WL_CHANSPEC_CHAN_MASK;
WL_DBG((" %s: %02d\n", __FUNCTION__, *channels));
if (*channels <= 14)
*channels |= band2G | bw;
else
*channels |= band5G | bw;
channels++;
n++;
}
}
return n;
}
#endif /* WES_SUPPORT */
for (i = 0; i < n_roam_cache; i++) {
chanspec_t ch = roam_cache[i].chanspec;
if ((roam_cache[i].ssid_len == ssid->SSID_len) &&
((ch & WL_CHANSPEC_CHAN_MASK) != target_chan) &&
((roam_band == WLC_BAND_AUTO) ||
((roam_band == WLC_BAND_2G) && CHSPEC_IS2G(ch)) ||
((roam_band == WLC_BAND_5G) && CHSPEC_IS5G(ch))) &&
(memcmp(roam_cache[i].ssid, ssid->SSID, ssid->SSID_len) == 0)) {
/* match found, add it */
*channels = ch & WL_CHANSPEC_CHAN_MASK;
if (*channels <= 14)
*channels |= band2G | bw;
else
*channels |= band5G | bw;
WL_DBG((" %s: %02d 0x%04X\n", __FUNCTION__,
ch & WL_CHANSPEC_CHAN_MASK, *channels));
channels++; n++;
}
}
return n;
}
/*
Take an array of measumrements representing summaries of different channels.
Return a recomended channel.
Interference is evil, get rid of that first.
Then hunt for lowest Other bss traffic.
Don't forget that channels with low duration times may not have accurate readings.
For the moment, do not overwrite input array.
*/
int
cca_analyze(cca_congest_channel_req_t *input[], int num_chans, uint flags, chanspec_t *answer)
{
uint8 bitmap[CEIL(MAX_CCA_CHANNELS, NBBY)]; /* 38 Max channels needs 5 bytes = 40 */
int i, left, winner;
uint32 min_obss = 1 << 30;
ASSERT(num_chans < MAX_CCA_CHANNELS);
for (i = 0; i < (int)sizeof(bitmap); i++)
bitmap[i] = 0;
/* Initially, all channels are up for consideration */
for (i = 0; i < num_chans; i++) {
if (input[i]->chanspec)
setbit(bitmap, i);
}
cca_info(bitmap, num_chans, &left, &i);
if (!left)
return CCA_ERRNO_TOO_FEW;
/* Filter for 2.4 GHz Band */
if (flags & CCA_FLAG_2G_ONLY) {
for (i = 0; i < num_chans; i++) {
if (!CHSPEC_IS2G(input[i]->chanspec))
clrbit(bitmap, i);
}
}
cca_info(bitmap, num_chans, &left, &i);
if (!left)
return CCA_ERRNO_BAND;
/* Filter for 5 GHz Band */
if (flags & CCA_FLAG_5G_ONLY) {
for (i = 0; i < num_chans; i++) {
if (!CHSPEC_IS5G(input[i]->chanspec))
clrbit(bitmap, i);
}
}
cca_info(bitmap, num_chans, &left, &i);
if (!left)
return CCA_ERRNO_BAND;
/* Filter for Duration */
if (!(flags & CCA_FLAG_IGNORE_DURATION)) {
for (i = 0; i < num_chans; i++) {
if (input[i]->secs[0].duration < CCA_THRESH_MILLI)
clrbit(bitmap, i);
}
}
cca_info(bitmap, num_chans, &left, &i);
if (!left)
return CCA_ERRNO_DURATION;
/* Filter for 1 6 11 on 2.4 Band */
if (flags & CCA_FLAGS_PREFER_1_6_11) {
int tmp_channel = spec_to_chan(input[i]->chanspec);
int is2g = CHSPEC_IS2G(input[i]->chanspec);
for (i = 0; i < num_chans; i++) {
if (is2g && tmp_channel != 1 && tmp_channel != 6 && tmp_channel != 11)
clrbit(bitmap, i);
}
}
cca_info(bitmap, num_chans, &left, &i);
if (!left)
return CCA_ERRNO_PREF_CHAN;
/* Toss high interference interference */
if (!(flags & CCA_FLAG_IGNORE_INTERFER)) {
for (i = 0; i < num_chans; i++) {
if (input[i]->secs[0].interference > CCA_THRESH_INTERFERE)
clrbit(bitmap, i);
}
cca_info(bitmap, num_chans, &left, &i);
if (!left)
return CCA_ERRNO_INTERFER;
}
/* Now find lowest obss */
winner = 0;
for (i = 0; i < num_chans; i++) {
if (isset(bitmap, i) && input[i]->secs[0].congest_obss < min_obss) {
winner = i;
min_obss = input[i]->secs[0].congest_obss;
}
}
*answer = input[winner]->chanspec;
return 0;
}
/*
Take an array of measumrements representing summaries of different channels.
Return a recomended channel.
Interference is evil, get rid of that first.
Then hunt for lowest Other bss traffic.
Don't forget that channels with low duration times may not have accurate readings.
For the moment, do not overwrite input array.
*/
int
cca_analyze(cca_congest_channel_req_t *input[], int num_chans, uint flags, chanspec_t *answer)
{
uint8 *bitmap = NULL; /* 38 Max channels needs 5 bytes = 40 */
int i, left, winner, ret_val = 0;
uint32 min_obss = 1 << 30;
uint bitmap_sz;
bitmap_sz = CEIL(num_chans, NBBY);
bitmap = (uint8 *)malloc(bitmap_sz);
if (bitmap == NULL) {
printf("unable to allocate memory\n");
return BCME_NOMEM;
}
memset(bitmap, 0, bitmap_sz);
/* Initially, all channels are up for consideration */
for (i = 0; i < num_chans; i++) {
if (input[i]->chanspec)
setbit(bitmap, i);
}
cca_info(bitmap, num_chans, &left, &i);
if (!left) {
ret_val = CCA_ERRNO_TOO_FEW;
goto f_exit;
}
/* Filter for 2.4 GHz Band */
if (flags & CCA_FLAG_2G_ONLY) {
for (i = 0; i < num_chans; i++) {
if (!CHSPEC_IS2G(input[i]->chanspec))
clrbit(bitmap, i);
}
}
cca_info(bitmap, num_chans, &left, &i);
if (!left) {
ret_val = CCA_ERRNO_BAND;
goto f_exit;
}
/* Filter for 5 GHz Band */
if (flags & CCA_FLAG_5G_ONLY) {
for (i = 0; i < num_chans; i++) {
if (!CHSPEC_IS5G(input[i]->chanspec))
clrbit(bitmap, i);
}
}
cca_info(bitmap, num_chans, &left, &i);
if (!left) {
ret_val = CCA_ERRNO_BAND;
goto f_exit;
}
/* Filter for Duration */
if (!(flags & CCA_FLAG_IGNORE_DURATION)) {
for (i = 0; i < num_chans; i++) {
if (input[i]->secs[0].duration < CCA_THRESH_MILLI)
clrbit(bitmap, i);
}
}
cca_info(bitmap, num_chans, &left, &i);
if (!left) {
ret_val = CCA_ERRNO_DURATION;
goto f_exit;
}
/* Filter for 1 6 11 on 2.4 Band */
if (flags & CCA_FLAGS_PREFER_1_6_11) {
int tmp_channel = spec_to_chan(input[i]->chanspec);
int is2g = CHSPEC_IS2G(input[i]->chanspec);
for (i = 0; i < num_chans; i++) {
if (is2g && tmp_channel != 1 && tmp_channel != 6 && tmp_channel != 11)
clrbit(bitmap, i);
}
}
cca_info(bitmap, num_chans, &left, &i);
if (!left) {
ret_val = CCA_ERRNO_PREF_CHAN;
goto f_exit;
}
/* Toss high interference interference */
if (!(flags & CCA_FLAG_IGNORE_INTERFER)) {
for (i = 0; i < num_chans; i++) {
if (input[i]->secs[0].interference > CCA_THRESH_INTERFERE)
clrbit(bitmap, i);
}
cca_info(bitmap, num_chans, &left, &i);
if (!left) {
ret_val = CCA_ERRNO_INTERFER;
goto f_exit;
}
}
/* Now find lowest obss */
winner = 0;
for (i = 0; i < num_chans; i++) {
if (isset(bitmap, i) && input[i]->secs[0].congest_obss < min_obss) {
winner = i;
min_obss = input[i]->secs[0].congest_obss;
}
}
*answer = input[winner]->chanspec;
f_exit:
free(bitmap); /* free the allocated memory for bitmap */
return ret_val;
}