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iwlwifi: 802.11n comply HT rate scaling flows with mac80211 framework 

This patch conforms the rate scaling flows according to the new mac80211's
HT framework

Signed-off-by: Ron Rindjunsky <ron.rindjunsky@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Ron Rindjunsky 2007-11-26 16:14:41 +02:00 committed by David S. Miller
parent 67d620357a
commit 270243a505
1 changed files with 57 additions and 36 deletions
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91
drivers/net/wireless/iwlwifi/iwl-4965-rs.c
View File

@ -498,14 +498,13 @@ static inline void rs_toggle_antenna(struct iwl4965_rate *new_rate,
} }
} }
static inline u8 rs_use_green(struct iwl4965_priv *priv) static inline u8 rs_use_green(struct iwl4965_priv *priv,
struct ieee80211_conf *conf)
{ {
#ifdef CONFIG_IWL4965_HT #ifdef CONFIG_IWL4965_HT
if (!priv->is_ht_enabled || !priv->current_assoc_ht.is_ht) return ((conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) &&
return 0; priv->current_ht_config.is_green_field &&
!priv->current_ht_config.non_GF_STA_present);
return ((priv->current_assoc_ht.is_green_field) &&
!(priv->current_assoc_ht.operating_mode & 0x4));
#endif /* CONFIG_IWL4965_HT */ #endif /* CONFIG_IWL4965_HT */
return 0; return 0;
} }
@ -1047,6 +1046,8 @@ static inline u8 rs_is_both_ant_supp(u8 valid_antenna)
*/ */
static int rs_switch_to_mimo(struct iwl4965_priv *priv, static int rs_switch_to_mimo(struct iwl4965_priv *priv,
struct iwl4965_rate_scale_priv *lq_data, struct iwl4965_rate_scale_priv *lq_data,
struct ieee80211_conf *conf,
struct sta_info *sta,
struct iwl4965_scale_tbl_info *tbl, int index) struct iwl4965_scale_tbl_info *tbl, int index)
{ {
#ifdef CONFIG_IWL4965_HT #ifdef CONFIG_IWL4965_HT
@ -1054,7 +1055,8 @@ static int rs_switch_to_mimo(struct iwl4965_priv *priv,
s32 rate; s32 rate;
s8 is_green = lq_data->is_green; s8 is_green = lq_data->is_green;
if (!priv->is_ht_enabled || !priv->current_assoc_ht.is_ht) if (!(conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) ||
!sta->ht_info.ht_supported)
return -1; return -1;
IWL_DEBUG_HT("LQ: try to switch to MIMO\n"); IWL_DEBUG_HT("LQ: try to switch to MIMO\n");
@ -1062,7 +1064,7 @@ static int rs_switch_to_mimo(struct iwl4965_priv *priv,
rs_get_supported_rates(lq_data, NULL, tbl->lq_type, rs_get_supported_rates(lq_data, NULL, tbl->lq_type,
&rate_mask); &rate_mask);
if (priv->current_assoc_ht.tx_mimo_ps_mode == IWL_MIMO_PS_STATIC) if (priv->current_ht_config.tx_mimo_ps_mode == IWL_MIMO_PS_STATIC)
return -1; return -1;
/* Need both Tx chains/antennas to support MIMO */ /* Need both Tx chains/antennas to support MIMO */
@ -1071,17 +1073,18 @@ static int rs_switch_to_mimo(struct iwl4965_priv *priv,
tbl->is_dup = lq_data->is_dup; tbl->is_dup = lq_data->is_dup;
tbl->action = 0; tbl->action = 0;
if (priv->current_channel_width == IWL_CHANNEL_WIDTH_40MHZ) if (priv->current_ht_config.supported_chan_width
== IWL_CHANNEL_WIDTH_40MHZ)
tbl->is_fat = 1; tbl->is_fat = 1;
else else
tbl->is_fat = 0; tbl->is_fat = 0;
if (tbl->is_fat) { if (tbl->is_fat) {
if (priv->current_assoc_ht.sgf & HT_SHORT_GI_40MHZ_ONLY) if (priv->current_ht_config.sgf & HT_SHORT_GI_40MHZ_ONLY)
tbl->is_SGI = 1; tbl->is_SGI = 1;
else else
tbl->is_SGI = 0; tbl->is_SGI = 0;
} else if (priv->current_assoc_ht.sgf & HT_SHORT_GI_20MHZ_ONLY) } else if (priv->current_ht_config.sgf & HT_SHORT_GI_20MHZ_ONLY)
tbl->is_SGI = 1; tbl->is_SGI = 1;
else else
tbl->is_SGI = 0; tbl->is_SGI = 0;
@ -1108,6 +1111,8 @@ static int rs_switch_to_mimo(struct iwl4965_priv *priv,
*/ */
static int rs_switch_to_siso(struct iwl4965_priv *priv, static int rs_switch_to_siso(struct iwl4965_priv *priv,
struct iwl4965_rate_scale_priv *lq_data, struct iwl4965_rate_scale_priv *lq_data,
struct ieee80211_conf *conf,
struct sta_info *sta,
struct iwl4965_scale_tbl_info *tbl, int index) struct iwl4965_scale_tbl_info *tbl, int index)
{ {
#ifdef CONFIG_IWL4965_HT #ifdef CONFIG_IWL4965_HT
@ -1116,7 +1121,8 @@ static int rs_switch_to_siso(struct iwl4965_priv *priv,
s32 rate; s32 rate;
IWL_DEBUG_HT("LQ: try to switch to SISO\n"); IWL_DEBUG_HT("LQ: try to switch to SISO\n");
if (!priv->is_ht_enabled || !priv->current_assoc_ht.is_ht) if (!(conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) ||
!sta->ht_info.ht_supported)
return -1; return -1;
tbl->is_dup = lq_data->is_dup; tbl->is_dup = lq_data->is_dup;
@ -1125,17 +1131,18 @@ static int rs_switch_to_siso(struct iwl4965_priv *priv,
rs_get_supported_rates(lq_data, NULL, tbl->lq_type, rs_get_supported_rates(lq_data, NULL, tbl->lq_type,
&rate_mask); &rate_mask);
if (priv->current_channel_width == IWL_CHANNEL_WIDTH_40MHZ) if (priv->current_ht_config.supported_chan_width
== IWL_CHANNEL_WIDTH_40MHZ)
tbl->is_fat = 1; tbl->is_fat = 1;
else else
tbl->is_fat = 0; tbl->is_fat = 0;
if (tbl->is_fat) { if (tbl->is_fat) {
if (priv->current_assoc_ht.sgf & HT_SHORT_GI_40MHZ_ONLY) if (priv->current_ht_config.sgf & HT_SHORT_GI_40MHZ_ONLY)
tbl->is_SGI = 1; tbl->is_SGI = 1;
else else
tbl->is_SGI = 0; tbl->is_SGI = 0;
} else if (priv->current_assoc_ht.sgf & HT_SHORT_GI_20MHZ_ONLY) } else if (priv->current_ht_config.sgf & HT_SHORT_GI_20MHZ_ONLY)
tbl->is_SGI = 1; tbl->is_SGI = 1;
else else
tbl->is_SGI = 0; tbl->is_SGI = 0;
@ -1167,6 +1174,8 @@ static int rs_switch_to_siso(struct iwl4965_priv *priv,
*/ */
static int rs_move_legacy_other(struct iwl4965_priv *priv, static int rs_move_legacy_other(struct iwl4965_priv *priv,
struct iwl4965_rate_scale_priv *lq_data, struct iwl4965_rate_scale_priv *lq_data,
struct ieee80211_conf *conf,
struct sta_info *sta,
int index) int index)
{ {
int ret = 0; int ret = 0;
@ -1213,8 +1222,8 @@ static int rs_move_legacy_other(struct iwl4965_priv *priv,
search_tbl->lq_type = LQ_SISO; search_tbl->lq_type = LQ_SISO;
search_tbl->is_SGI = 0; search_tbl->is_SGI = 0;
search_tbl->is_fat = 0; search_tbl->is_fat = 0;
ret = rs_switch_to_siso(priv, lq_data, search_tbl, ret = rs_switch_to_siso(priv, lq_data, conf, sta,
index); search_tbl, index);
if (!ret) { if (!ret) {
lq_data->search_better_tbl = 1; lq_data->search_better_tbl = 1;
lq_data->action_counter = 0; lq_data->action_counter = 0;
@ -1231,8 +1240,8 @@ static int rs_move_legacy_other(struct iwl4965_priv *priv,
search_tbl->is_SGI = 0; search_tbl->is_SGI = 0;
search_tbl->is_fat = 0; search_tbl->is_fat = 0;
search_tbl->antenna_type = ANT_BOTH; search_tbl->antenna_type = ANT_BOTH;
ret = rs_switch_to_mimo(priv, lq_data, search_tbl, ret = rs_switch_to_mimo(priv, lq_data, conf, sta,
index); search_tbl, index);
if (!ret) { if (!ret) {
lq_data->search_better_tbl = 1; lq_data->search_better_tbl = 1;
lq_data->action_counter = 0; lq_data->action_counter = 0;
@ -1263,6 +1272,8 @@ static int rs_move_legacy_other(struct iwl4965_priv *priv,
*/ */
static int rs_move_siso_to_other(struct iwl4965_priv *priv, static int rs_move_siso_to_other(struct iwl4965_priv *priv,
struct iwl4965_rate_scale_priv *lq_data, struct iwl4965_rate_scale_priv *lq_data,
struct ieee80211_conf *conf,
struct sta_info *sta,
int index) int index)
{ {
int ret; int ret;
@ -1303,8 +1314,8 @@ static int rs_move_siso_to_other(struct iwl4965_priv *priv,
search_tbl->is_SGI = 0; search_tbl->is_SGI = 0;
search_tbl->is_fat = 0; search_tbl->is_fat = 0;
search_tbl->antenna_type = ANT_BOTH; search_tbl->antenna_type = ANT_BOTH;
ret = rs_switch_to_mimo(priv, lq_data, search_tbl, ret = rs_switch_to_mimo(priv, lq_data, conf, sta,
index); search_tbl, index);
if (!ret) { if (!ret) {
lq_data->search_better_tbl = 1; lq_data->search_better_tbl = 1;
goto out; goto out;
@ -1356,6 +1367,8 @@ static int rs_move_siso_to_other(struct iwl4965_priv *priv,
*/ */
static int rs_move_mimo_to_other(struct iwl4965_priv *priv, static int rs_move_mimo_to_other(struct iwl4965_priv *priv,
struct iwl4965_rate_scale_priv *lq_data, struct iwl4965_rate_scale_priv *lq_data,
struct ieee80211_conf *conf,
struct sta_info *sta,
int index) int index)
{ {
int ret; int ret;
@ -1385,8 +1398,8 @@ static int rs_move_mimo_to_other(struct iwl4965_priv *priv,
else else
search_tbl->antenna_type = ANT_AUX; search_tbl->antenna_type = ANT_AUX;
ret = rs_switch_to_siso(priv, lq_data, search_tbl, ret = rs_switch_to_siso(priv, lq_data, conf, sta,
index); search_tbl, index);
if (!ret) { if (!ret) {
lq_data->search_better_tbl = 1; lq_data->search_better_tbl = 1;
goto out; goto out;
@ -1536,6 +1549,9 @@ static void rs_rate_scale_perform(struct iwl4965_priv *priv,
struct ieee80211_hdr *hdr, struct ieee80211_hdr *hdr,
struct sta_info *sta) struct sta_info *sta)
{ {
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
struct ieee80211_hw *hw = local_to_hw(local);
struct ieee80211_conf *conf = &hw->conf;
int low = IWL_RATE_INVALID; int low = IWL_RATE_INVALID;
int high = IWL_RATE_INVALID; int high = IWL_RATE_INVALID;
int index; int index;
@ -1851,11 +1867,11 @@ static void rs_rate_scale_perform(struct iwl4965_priv *priv,
/* Select a new "search" modulation mode to try. /* Select a new "search" modulation mode to try.
* If one is found, set up the new "search" table. */ * If one is found, set up the new "search" table. */
if (is_legacy(tbl->lq_type)) if (is_legacy(tbl->lq_type))
rs_move_legacy_other(priv, lq_data, index); rs_move_legacy_other(priv, lq_data, conf, sta, index);
else if (is_siso(tbl->lq_type)) else if (is_siso(tbl->lq_type))
rs_move_siso_to_other(priv, lq_data, index); rs_move_siso_to_other(priv, lq_data, conf, sta, index);
else else
rs_move_mimo_to_other(priv, lq_data, index); rs_move_mimo_to_other(priv, lq_data, conf, sta, index);
/* If new "search" mode was selected, set up in uCode table */ /* If new "search" mode was selected, set up in uCode table */
if (lq_data->search_better_tbl) { if (lq_data->search_better_tbl) {
@ -1883,7 +1899,7 @@ static void rs_rate_scale_perform(struct iwl4965_priv *priv,
tbl1 = &(lq_data->lq_info[lq_data->active_tbl]); tbl1 = &(lq_data->lq_info[lq_data->active_tbl]);
if (is_legacy(tbl1->lq_type) && if (is_legacy(tbl1->lq_type) &&
#ifdef CONFIG_IWL4965_HT #ifdef CONFIG_IWL4965_HT
!priv->current_assoc_ht.is_ht && (!(conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE)) &&
#endif #endif
(lq_data->action_counter >= 1)) { (lq_data->action_counter >= 1)) {
lq_data->action_counter = 0; lq_data->action_counter = 0;
@ -1939,6 +1955,7 @@ out:
static void rs_initialize_lq(struct iwl4965_priv *priv, static void rs_initialize_lq(struct iwl4965_priv *priv,
struct ieee80211_conf *conf,
struct sta_info *sta) struct sta_info *sta)
{ {
int i; int i;
@ -1946,7 +1963,7 @@ static void rs_initialize_lq(struct iwl4965_priv *priv,
struct iwl4965_scale_tbl_info *tbl; struct iwl4965_scale_tbl_info *tbl;
u8 active_tbl = 0; u8 active_tbl = 0;
int rate_idx; int rate_idx;
u8 use_green = rs_use_green(priv); u8 use_green = rs_use_green(priv, conf);
struct iwl4965_rate mcs_rate; struct iwl4965_rate mcs_rate;
if (!sta || !sta->rate_ctrl_priv) if (!sta || !sta->rate_ctrl_priv)
@ -1997,6 +2014,7 @@ static void rs_get_rate(void *priv_rate, struct net_device *dev,
int i; int i;
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
struct ieee80211_conf *conf = &local->hw.conf;
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
struct sta_info *sta; struct sta_info *sta;
struct iwl4965_priv *priv = (struct iwl4965_priv *)priv_rate; struct iwl4965_priv *priv = (struct iwl4965_priv *)priv_rate;
@ -2030,7 +2048,7 @@ static void rs_get_rate(void *priv_rate, struct net_device *dev,
lq->lq.sta_id = sta_id; lq->lq.sta_id = sta_id;
lq->lq.rs_table[0].rate_n_flags = 0; lq->lq.rs_table[0].rate_n_flags = 0;
lq->ibss_sta_added = 1; lq->ibss_sta_added = 1;
rs_initialize_lq(priv, sta); rs_initialize_lq(priv, conf, sta);
} }
if (!lq->ibss_sta_added) if (!lq->ibss_sta_added)
goto done; goto done;
@ -2072,6 +2090,7 @@ static void rs_rate_init(void *priv_rate, void *priv_sta,
struct sta_info *sta) struct sta_info *sta)
{ {
int i, j; int i, j;
struct ieee80211_conf *conf = &local->hw.conf;
struct ieee80211_hw_mode *mode = local->oper_hw_mode; struct ieee80211_hw_mode *mode = local->oper_hw_mode;
struct iwl4965_priv *priv = (struct iwl4965_priv *)priv_rate; struct iwl4965_priv *priv = (struct iwl4965_priv *)priv_rate;
struct iwl4965_rate_scale_priv *crl = priv_sta; struct iwl4965_rate_scale_priv *crl = priv_sta;
@ -2126,7 +2145,7 @@ static void rs_rate_init(void *priv_rate, void *priv_sta,
crl->is_dup = 0; crl->is_dup = 0;
crl->valid_antenna = priv->valid_antenna; crl->valid_antenna = priv->valid_antenna;
crl->antenna = priv->antenna; crl->antenna = priv->antenna;
crl->is_green = rs_use_green(priv); crl->is_green = rs_use_green(priv, conf);
crl->active_rate = priv->active_rate; crl->active_rate = priv->active_rate;
crl->active_rate &= ~(0x1000); crl->active_rate &= ~(0x1000);
crl->active_rate_basic = priv->active_rate_basic; crl->active_rate_basic = priv->active_rate_basic;
@ -2136,14 +2155,16 @@ static void rs_rate_init(void *priv_rate, void *priv_sta,
* active_siso_rate mask includes 9 MBits (bit 5), and CCK (bits 0-3), * active_siso_rate mask includes 9 MBits (bit 5), and CCK (bits 0-3),
* supp_rates[] does not; shift to convert format, force 9 MBits off. * supp_rates[] does not; shift to convert format, force 9 MBits off.
*/ */
crl->active_siso_rate = (priv->current_assoc_ht.supp_rates[0] << 1); crl->active_siso_rate = (priv->current_ht_config.supp_mcs_set[0] << 1);
crl->active_siso_rate |= (priv->current_assoc_ht.supp_rates[0] & 0x1); crl->active_siso_rate |=
(priv->current_ht_config.supp_mcs_set[0] & 0x1);
crl->active_siso_rate &= ~((u16)0x2); crl->active_siso_rate &= ~((u16)0x2);
crl->active_siso_rate = crl->active_siso_rate << IWL_FIRST_OFDM_RATE; crl->active_siso_rate = crl->active_siso_rate << IWL_FIRST_OFDM_RATE;
/* Same here */ /* Same here */
crl->active_mimo_rate = (priv->current_assoc_ht.supp_rates[1] << 1); crl->active_mimo_rate = (priv->current_ht_config.supp_mcs_set[1] << 1);
crl->active_mimo_rate |= (priv->current_assoc_ht.supp_rates[1] & 0x1); crl->active_mimo_rate |=
(priv->current_ht_config.supp_mcs_set[1] & 0x1);
crl->active_mimo_rate &= ~((u16)0x2); crl->active_mimo_rate &= ~((u16)0x2);
crl->active_mimo_rate = crl->active_mimo_rate << IWL_FIRST_OFDM_RATE; crl->active_mimo_rate = crl->active_mimo_rate << IWL_FIRST_OFDM_RATE;
IWL_DEBUG_HT("MIMO RATE 0x%X SISO MASK 0x%X\n", crl->active_siso_rate, IWL_DEBUG_HT("MIMO RATE 0x%X SISO MASK 0x%X\n", crl->active_siso_rate,
@ -2156,7 +2177,7 @@ static void rs_rate_init(void *priv_rate, void *priv_sta,
if (priv->assoc_station_added) if (priv->assoc_station_added)
priv->lq_mngr.lq_ready = 1; priv->lq_mngr.lq_ready = 1;
rs_initialize_lq(priv, sta); rs_initialize_lq(priv, conf, sta);
} }
static void rs_fill_link_cmd(struct iwl4965_rate_scale_priv *lq_data, static void rs_fill_link_cmd(struct iwl4965_rate_scale_priv *lq_data,