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mac80211: pass dtim_period to low level driver 

This patch adds the dtim_period in ieee80211_bss_conf, this allows the low
level driver to know the dtim_period, and to plan power save accordingly.

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Zhu Yi <yi.zhu@intel.com>
Acked-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Emmanuel Grumbach 2008-07-18 13:52:59 +08:00 committed by John W. Linville
parent 298df1f62a
commit 98f7dfd86c
4 changed files with 28 additions and 1 deletions
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13
include/linux/ieee80211.h
View File

@ -506,6 +506,19 @@ struct ieee80211_channel_sw_ie {
u8 count;
} __attribute__ ((packed));
/**
* struct ieee80211_tim
*
* This structure refers to "Traffic Indication Map information element"
*/
struct ieee80211_tim_ie {
u8 dtim_count;
u8 dtim_period;
u8 bitmap_ctrl;
/* variable size: 1 - 251 bytes */
u8 virtual_map[0];
} __attribute__ ((packed));
struct ieee80211_mgmt {
__le16 frame_control;
__le16 duration;

4
include/net/mac80211.h
View File

@ -177,9 +177,10 @@ enum ieee80211_bss_change {
* @aid: association ID number, valid only when @assoc is true
* @use_cts_prot: use CTS protection
* @use_short_preamble: use 802.11b short preamble
* @dtim_period: num of beacons before the next DTIM, for PSM
* @timestamp: beacon timestamp
* @beacon_int: beacon interval
* @assoc_capability: capabbilities taken from assoc resp
* @assoc_capability: capabilities taken from assoc resp
* @assoc_ht: association in HT mode
* @ht_conf: ht capabilities
* @ht_bss_conf: ht extended capabilities
@ -191,6 +192,7 @@ struct ieee80211_bss_conf {
/* erp related data */
bool use_cts_prot;
bool use_short_preamble;
u8 dtim_period;
u16 beacon_int;
u16 assoc_capability;
u64 timestamp;

1
net/mac80211/ieee80211_i.h
View File

@ -82,6 +82,7 @@ struct ieee80211_sta_bss {
u8 bssid[ETH_ALEN];
u8 ssid[IEEE80211_MAX_SSID_LEN];
u8 dtim_period;
u16 capability; /* host byte order */
enum ieee80211_band band;
int freq;

11
net/mac80211/mlme.c
View File

@ -551,6 +551,7 @@ static void ieee80211_set_associated(struct net_device *dev,
/* set timing information */
sdata->bss_conf.beacon_int = bss->beacon_int;
sdata->bss_conf.timestamp = bss->timestamp;
sdata->bss_conf.dtim_period = bss->dtim_period;
changed |= ieee80211_handle_bss_capability(sdata, bss);
@ -2688,6 +2689,16 @@ static void ieee80211_rx_bss_info(struct net_device *dev,
bss->beacon_int = le16_to_cpu(mgmt->u.beacon.beacon_int);
bss->capability = le16_to_cpu(mgmt->u.beacon.capab_info);
if (elems->tim) {
struct ieee80211_tim_ie *tim_ie =
(struct ieee80211_tim_ie *)elems->tim;
bss->dtim_period = tim_ie->dtim_period;
}
/* set default value for buggy APs */
if (!elems->tim || bss->dtim_period == 0)
bss->dtim_period = 1;
bss->supp_rates_len = 0;
if (elems->supp_rates) {
clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;