wl12xx: support FW TX inactivity triggers

In AP mode we register for the MAX_TX_RETRY and INACTIVE_STA events.
Both are reported to the upper layers as a TX failure in the offending
stations.

In STA mode we register only for the MAX_TX_RETRY event. A TX failure is
interpreted as a loss of connection.

Support for IEEE80211_HW_REPORTS_TX_ACK_STATUS has been removed to avoid
the inherent race condition of a mac80211 TX failure counter in addition
to the FW counter.

This patch depends on "mac80211: allow low level driver to report packet
loss"

Signed-off-by: Arik Nemtsov <arik@wizery.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Arik Nemtsov 2011-04-26 23:21:51 +03:00 committed by John W. Linville
parent a039a99349
commit 47684808fd
10 changed files with 125 additions and 17 deletions

View File

@ -1524,22 +1524,46 @@ out:
return ret;
}
int wl1271_acx_max_tx_retry(struct wl1271 *wl)
int wl1271_acx_ap_max_tx_retry(struct wl1271 *wl)
{
struct wl1271_acx_max_tx_retry *acx = NULL;
struct wl1271_acx_ap_max_tx_retry *acx = NULL;
int ret;
wl1271_debug(DEBUG_ACX, "acx max tx retry");
wl1271_debug(DEBUG_ACX, "acx ap max tx retry");
acx = kzalloc(sizeof(*acx), GFP_KERNEL);
if (!acx)
return -ENOMEM;
acx->max_tx_retry = cpu_to_le16(wl->conf.tx.ap_max_tx_retries);
acx->max_tx_retry = cpu_to_le16(wl->conf.tx.max_tx_retries);
ret = wl1271_cmd_configure(wl, ACX_MAX_TX_FAILURE, acx, sizeof(*acx));
if (ret < 0) {
wl1271_warning("acx max tx retry failed: %d", ret);
wl1271_warning("acx ap max tx retry failed: %d", ret);
goto out;
}
out:
kfree(acx);
return ret;
}
int wl1271_acx_sta_max_tx_retry(struct wl1271 *wl)
{
struct wl1271_acx_sta_max_tx_retry *acx = NULL;
int ret;
wl1271_debug(DEBUG_ACX, "acx sta max tx retry");
acx = kzalloc(sizeof(*acx), GFP_KERNEL);
if (!acx)
return -ENOMEM;
acx->max_tx_retry = wl->conf.tx.max_tx_retries;
ret = wl1271_cmd_configure(wl, ACX_CONS_TX_FAILURE, acx, sizeof(*acx));
if (ret < 0) {
wl1271_warning("acx sta max tx retry failed: %d", ret);
goto out;
}

View File

@ -1145,7 +1145,7 @@ struct wl1271_acx_fw_tsf_information {
u8 padding[3];
} __packed;
struct wl1271_acx_max_tx_retry {
struct wl1271_acx_ap_max_tx_retry {
struct acx_header header;
/*
@ -1156,6 +1156,13 @@ struct wl1271_acx_max_tx_retry {
u8 padding_1[2];
} __packed;
struct wl1271_acx_sta_max_tx_retry {
struct acx_header header;
u8 max_tx_retry;
u8 padding_1[3];
} __packed;
struct wl1271_acx_config_ps {
struct acx_header header;
@ -1307,7 +1314,8 @@ int wl1271_acx_set_ba_session(struct wl1271 *wl,
int wl1271_acx_set_ba_receiver_session(struct wl1271 *wl, u8 tid_index, u16 ssn,
bool enable);
int wl1271_acx_tsf_info(struct wl1271 *wl, u64 *mactime);
int wl1271_acx_max_tx_retry(struct wl1271 *wl);
int wl1271_acx_ap_max_tx_retry(struct wl1271 *wl);
int wl1271_acx_sta_max_tx_retry(struct wl1271 *wl);
int wl1271_acx_config_ps(struct wl1271 *wl);
int wl1271_acx_set_inconnection_sta(struct wl1271 *wl, u8 *addr);

View File

@ -478,10 +478,12 @@ static int wl1271_boot_run_firmware(struct wl1271 *wl)
DISCONNECT_EVENT_COMPLETE_ID |
RSSI_SNR_TRIGGER_0_EVENT_ID |
PSPOLL_DELIVERY_FAILURE_EVENT_ID |
SOFT_GEMINI_SENSE_EVENT_ID;
SOFT_GEMINI_SENSE_EVENT_ID |
MAX_TX_RETRY_EVENT_ID;
if (wl->bss_type == BSS_TYPE_AP_BSS)
wl->event_mask |= STA_REMOVE_COMPLETE_EVENT_ID;
wl->event_mask |= STA_REMOVE_COMPLETE_EVENT_ID |
INACTIVE_STA_EVENT_ID;
else
wl->event_mask |= DUMMY_PACKET_EVENT_ID;

View File

@ -1070,7 +1070,7 @@ int wl1271_cmd_start_bss(struct wl1271 *wl)
memcpy(cmd->bssid, bss_conf->bssid, ETH_ALEN);
cmd->aging_period = cpu_to_le16(WL1271_AP_DEF_INACTIV_SEC);
cmd->aging_period = cpu_to_le16(wl->conf.tx.ap_aging_period);
cmd->bss_index = WL1271_AP_BSS_INDEX;
cmd->global_hlid = WL1271_AP_GLOBAL_HLID;
cmd->broadcast_hlid = WL1271_AP_BROADCAST_HLID;

View File

@ -683,10 +683,18 @@ struct conf_tx_settings {
struct conf_tx_rate_class ap_bcst_conf;
/*
* AP-mode - allow this number of TX retries to a station before an
* Allow this number of TX retries to a connected station/AP before an
* event is triggered from FW.
* In AP-mode the hlids of unreachable stations are given in the
* "sta_tx_retry_exceeded" member in the event mailbox.
*/
u16 ap_max_tx_retries;
u8 max_tx_retries;
/*
* AP-mode - after this number of seconds a connected station is
* considered inactive.
*/
u16 ap_aging_period;
/*
* Configuration for TID parameters.

View File

@ -174,6 +174,8 @@ static int wl1271_event_process(struct wl1271 *wl, struct event_mailbox *mbox)
u32 vector;
bool beacon_loss = false;
bool is_ap = (wl->bss_type == BSS_TYPE_AP_BSS);
bool disconnect_sta = false;
unsigned long sta_bitmap = 0;
wl1271_event_mbox_dump(mbox);
@ -235,9 +237,54 @@ static int wl1271_event_process(struct wl1271 *wl, struct event_mailbox *mbox)
wl1271_tx_dummy_packet(wl);
}
/*
* "TX retries exceeded" has a different meaning according to mode.
* In AP mode the offending station is disconnected. In STA mode we
* report connection loss.
*/
if (vector & MAX_TX_RETRY_EVENT_ID) {
wl1271_debug(DEBUG_EVENT, "MAX_TX_RETRY_EVENT_ID");
if (is_ap) {
sta_bitmap |= le16_to_cpu(mbox->sta_tx_retry_exceeded);
disconnect_sta = true;
} else {
beacon_loss = true;
}
}
if ((vector & INACTIVE_STA_EVENT_ID) && is_ap) {
wl1271_debug(DEBUG_EVENT, "INACTIVE_STA_EVENT_ID");
sta_bitmap |= le16_to_cpu(mbox->sta_aging_status);
disconnect_sta = true;
}
if (wl->vif && beacon_loss)
ieee80211_connection_loss(wl->vif);
if (is_ap && disconnect_sta) {
u32 num_packets = wl->conf.tx.max_tx_retries;
struct ieee80211_sta *sta;
const u8 *addr;
int h;
for (h = find_first_bit(&sta_bitmap, AP_MAX_LINKS);
h < AP_MAX_LINKS;
h = find_next_bit(&sta_bitmap, AP_MAX_LINKS, h+1)) {
if (!wl1271_is_active_sta(wl, h))
continue;
addr = wl->links[h].addr;
rcu_read_lock();
sta = ieee80211_find_sta(wl->vif, addr);
if (sta) {
wl1271_debug(DEBUG_EVENT, "remove sta %d", h);
ieee80211_report_low_ack(sta, num_packets);
}
rcu_read_unlock();
}
}
return 0;
}

View File

@ -58,13 +58,16 @@ enum {
CHANNEL_SWITCH_COMPLETE_EVENT_ID = BIT(17),
BSS_LOSE_EVENT_ID = BIT(18),
REGAINED_BSS_EVENT_ID = BIT(19),
ROAMING_TRIGGER_MAX_TX_RETRY_EVENT_ID = BIT(20),
MAX_TX_RETRY_EVENT_ID = BIT(20),
/* STA: dummy paket for dynamic mem blocks */
DUMMY_PACKET_EVENT_ID = BIT(21),
/* AP: STA remove complete */
STA_REMOVE_COMPLETE_EVENT_ID = BIT(21),
SOFT_GEMINI_SENSE_EVENT_ID = BIT(22),
/* STA: SG prediction */
SOFT_GEMINI_PREDICTION_EVENT_ID = BIT(23),
/* AP: Inactive STA */
INACTIVE_STA_EVENT_ID = BIT(23),
SOFT_GEMINI_AVALANCHE_EVENT_ID = BIT(24),
PLT_RX_CALIBRATION_COMPLETE_EVENT_ID = BIT(25),
DBG_EVENT_ID = BIT(26),
@ -119,7 +122,11 @@ struct event_mailbox {
/* AP FW only */
u8 hlid_removed;
/* a bitmap of hlids for stations that have been inactive too long */
__le16 sta_aging_status;
/* a bitmap of hlids for stations which didn't respond to TX */
__le16 sta_tx_retry_exceeded;
u8 reserved_5[24];
@ -130,4 +137,7 @@ void wl1271_event_mbox_config(struct wl1271 *wl);
int wl1271_event_handle(struct wl1271 *wl, u8 mbox);
void wl1271_pspoll_work(struct work_struct *work);
/* Functions from main.c */
bool wl1271_is_active_sta(struct wl1271 *wl, u8 hlid);
#endif

View File

@ -375,6 +375,10 @@ static int wl1271_sta_hw_init(struct wl1271 *wl)
if (ret < 0)
return ret;
ret = wl1271_acx_sta_max_tx_retry(wl);
if (ret < 0)
return ret;
ret = wl1271_acx_sta_mem_cfg(wl);
if (ret < 0)
return ret;
@ -441,7 +445,7 @@ static int wl1271_ap_hw_init(struct wl1271 *wl)
if (ret < 0)
return ret;
ret = wl1271_acx_max_tx_retry(wl);
ret = wl1271_acx_ap_max_tx_retry(wl);
if (ret < 0)
return ret;

View File

@ -192,7 +192,8 @@ static struct conf_drv_settings default_conf = {
.long_retry_limit = 10,
.aflags = 0,
},
.ap_max_tx_retries = 100,
.max_tx_retries = 100,
.ap_aging_period = 300,
.tid_conf_count = 4,
.tid_conf = {
[CONF_TX_AC_BE] = {
@ -2953,6 +2954,12 @@ static void wl1271_free_sta(struct wl1271 *wl, u8 hlid)
__clear_bit(hlid, (unsigned long *)&wl->ap_fw_ps_map);
}
bool wl1271_is_active_sta(struct wl1271 *wl, u8 hlid)
{
int id = hlid - WL1271_AP_STA_HLID_START;
return test_bit(id, wl->ap_hlid_map);
}
static int wl1271_op_sta_add(struct ieee80211_hw *hw,
struct ieee80211_vif *vif,
struct ieee80211_sta *sta)
@ -3535,7 +3542,6 @@ int wl1271_init_ieee80211(struct wl1271 *wl)
IEEE80211_HW_HAS_RATE_CONTROL |
IEEE80211_HW_CONNECTION_MONITOR |
IEEE80211_HW_SUPPORTS_CQM_RSSI |
IEEE80211_HW_REPORTS_TX_ACK_STATUS |
IEEE80211_HW_AP_LINK_PS;
wl->hw->wiphy->cipher_suites = cipher_suites;

View File

@ -172,7 +172,6 @@ extern u32 wl12xx_debug_level;
#define WL1271_PS_STA_MAX_BLOCKS (2 * 9)
#define WL1271_AP_BSS_INDEX 0
#define WL1271_AP_DEF_INACTIV_SEC 300
#define WL1271_AP_DEF_BEACON_EXP 20
#define ACX_TX_DESCRIPTORS 32