TWxSoftware/twx-linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

mac80211: add rate mask logic for vht rates

Browse Source 
Define rc_rateidx_vht_mcs_mask array and rate_idx_match_vht_mcs_mask()
method in order to apply mcs mask for vht rates

Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi83@gmail.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Lorenzo Bianconi
2015-08-06 23:47:33 +02:00
committed by Johannes Berg
parent e910867bd2
commit b119ad6e72
6 changed files with 181 additions and 16 deletions
Download Patch File Download Diff File Expand all files Collapse all files
net/mac80211/rate.c
+91 -11
View File
@@ -414,16 +414,77 @@ static bool rate_idx_match_mcs_mask(s8 *rate_idx, u8 *mcs_mask)
return false;
}
static bool rate_idx_match_vht_mcs_mask(s8 *rate_idx, u16 *vht_mask)
{
int i, j;
int ridx, rbit;
ridx = *rate_idx >> 4;
rbit = *rate_idx & 0xf;
if (ridx < 0 || ridx >= NL80211_VHT_NSS_MAX)
return false;
/* See whether the selected rate or anything below it is allowed. */
for (i = ridx; i >= 0; i--) {
for (j = rbit; j >= 0; j--) {
if (vht_mask[i] & BIT(j)) {
*rate_idx = (i << 4) | j;
return true;
}
}
rbit = 15;
}
/* Try to find a higher rate that would be allowed */
ridx = (*rate_idx + 1) >> 4;
rbit = (*rate_idx + 1) & 0xf;
for (i = ridx; i < NL80211_VHT_NSS_MAX; i++) {
for (j = rbit; j < 16; j++) {
if (vht_mask[i] & BIT(j)) {
*rate_idx = (i << 4) | j;
return true;
}
}
rbit = 0;
}
return false;
}
static void rate_idx_match_mask(s8 *rate_idx, u16 *rate_flags,
struct ieee80211_supported_band *sband,
enum nl80211_chan_width chan_width,
u32 mask,
u8 mcs_mask[IEEE80211_HT_MCS_MASK_LEN])
u8 mcs_mask[IEEE80211_HT_MCS_MASK_LEN],
u16 vht_mask[NL80211_VHT_NSS_MAX])
{
/* handle HT rates */
if (*rate_flags & IEEE80211_TX_RC_MCS) {
if (*rate_flags & IEEE80211_TX_RC_VHT_MCS) {
/* handle VHT rates */
if (rate_idx_match_vht_mcs_mask(rate_idx, vht_mask))
return;
*rate_idx = 0;
/* keep protection flags */
*rate_flags &= (IEEE80211_TX_RC_USE_RTS_CTS |
IEEE80211_TX_RC_USE_CTS_PROTECT |
IEEE80211_TX_RC_USE_SHORT_PREAMBLE);
*rate_flags |= IEEE80211_TX_RC_MCS;
if (chan_width == NL80211_CHAN_WIDTH_40)
*rate_flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
if (rate_idx_match_mcs_mask(rate_idx, mcs_mask))
return;
/* also try the legacy rates. */
*rate_flags &= ~(IEEE80211_TX_RC_MCS |
IEEE80211_TX_RC_40_MHZ_WIDTH);
if (rate_idx_match_legacy_mask(rate_idx, sband->n_bitrates,
mask))
return;
} else if (*rate_flags & IEEE80211_TX_RC_MCS) {
/* handle HT rates */
if (rate_idx_match_mcs_mask(rate_idx, mcs_mask))
return;
@@ -436,7 +497,7 @@ static void rate_idx_match_mask(s8 *rate_idx, u16 *rate_flags,
if (rate_idx_match_legacy_mask(rate_idx, sband->n_bitrates,
mask))
return;
} else if (!(*rate_flags & IEEE80211_TX_RC_VHT_MCS)) {
} else {
/* handle legacy rates */
if (rate_idx_match_legacy_mask(rate_idx, sband->n_bitrates,
mask))
@@ -620,7 +681,8 @@ static void rate_control_fill_sta_table(struct ieee80211_sta *sta,
static bool rate_control_cap_mask(struct ieee80211_sub_if_data *sdata,
struct ieee80211_supported_band *sband,
struct ieee80211_sta *sta, u32 *mask,
u8 mcs_mask[IEEE80211_HT_MCS_MASK_LEN])
u8 mcs_mask[IEEE80211_HT_MCS_MASK_LEN],
u16 vht_mask[NL80211_VHT_NSS_MAX])
{
u32 i, flags;
@@ -632,7 +694,8 @@ static bool rate_control_cap_mask(struct ieee80211_sub_if_data *sdata,
}
if (*mask == (1 << sband->n_bitrates) - 1 &&
!sdata->rc_has_mcs_mask[sband->band])
!sdata->rc_has_mcs_mask[sband->band] &&
!sdata->rc_has_vht_mcs_mask[sband->band])
return false;
if (sdata->rc_has_mcs_mask[sband->band])
@@ -641,11 +704,25 @@ static bool rate_control_cap_mask(struct ieee80211_sub_if_data *sdata,
else
memset(mcs_mask, 0xff, IEEE80211_HT_MCS_MASK_LEN);
if (sdata->rc_has_vht_mcs_mask[sband->band])
memcpy(vht_mask, sdata->rc_rateidx_vht_mcs_mask[sband->band],
sizeof(u16) * NL80211_VHT_NSS_MAX);
else
memset(vht_mask, 0xff, sizeof(u16) * NL80211_VHT_NSS_MAX);
if (sta) {
__le16 sta_vht_cap;
u16 sta_vht_mask[NL80211_VHT_NSS_MAX];
/* Filter out rates that the STA does not support */
*mask &= sta->supp_rates[sband->band];
for (i = 0; i < sizeof(mcs_mask); i++)
mcs_mask[i] &= sta->ht_cap.mcs.rx_mask[i];
sta_vht_cap = sta->vht_cap.vht_mcs.rx_mcs_map;
ieee80211_get_vht_mask_from_cap(sta_vht_cap, sta_vht_mask);
for (i = 0; i < NL80211_VHT_NSS_MAX; i++)
vht_mask[i] &= sta_vht_mask[i];
}
return true;
@@ -659,10 +736,11 @@ rate_control_apply_mask_ratetbl(struct sta_info *sta,
int i;
u32 mask;
u8 mcs_mask[IEEE80211_HT_MCS_MASK_LEN];
u16 vht_mask[NL80211_VHT_NSS_MAX];
enum nl80211_chan_width chan_width;
if (!rate_control_cap_mask(sta->sdata, sband, &sta->sta, &mask,
mcs_mask))
mcs_mask, vht_mask))
return;
chan_width = sta->sdata->vif.bss_conf.chandef.width;
@@ -671,7 +749,8 @@ rate_control_apply_mask_ratetbl(struct sta_info *sta,
break;
rate_idx_match_mask(&rates->rate[i].idx, &rates->rate[i].flags,
sband, chan_width, mask, mcs_mask);
sband, chan_width, mask, mcs_mask,
vht_mask);
}
}
@@ -684,7 +763,7 @@ static void rate_control_apply_mask(struct ieee80211_sub_if_data *sdata,
enum nl80211_chan_width chan_width;
u8 mcs_mask[IEEE80211_HT_MCS_MASK_LEN];
u32 mask;
u16 rate_flags;
u16 rate_flags, vht_mask[NL80211_VHT_NSS_MAX];
int i;
/*
@@ -692,7 +771,8 @@ static void rate_control_apply_mask(struct ieee80211_sub_if_data *sdata,
* default mask (allow all rates) is used to save some processing for
* the common case.
*/
if (!rate_control_cap_mask(sdata, sband, sta, &mask, mcs_mask))
if (!rate_control_cap_mask(sdata, sband, sta, &mask, mcs_mask,
vht_mask))
return;
/*
@@ -708,7 +788,7 @@ static void rate_control_apply_mask(struct ieee80211_sub_if_data *sdata,
rate_flags = rates[i].flags;
rate_idx_match_mask(&rates[i].idx, &rate_flags, sband,
chan_width, mask, mcs_mask);
chan_width, mask, mcs_mask, vht_mask);
rates[i].flags = rate_flags;
}
}