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wl12xx: 1281/1283 support - Add dummy packet support 

Support sending dummy packet to wl128x FW as results of
dummy packet event. That is part of dynamic TX mem blocks mechanism.

Only send dummy packet when not in AP mode.

[Even though the DUMMY_PACKET_EVENT_ID and the
STA_REMOVE_COMPLETE_EVENT_ID events are defined to the same value, we
need to treat them separately in the code.  Keep the check and enable
STA_REMOVE_COMPLETE_EVENT_ID for AP mode and DUMMY_PACKET_EVENT_ID for
STA.  Moved one warning to a cleaner place.  Use WL1271_TID_MGMT for
dummy packets -- Luca]

Signed-off-by: Shahar Levi <shahar_levi@ti.com>
Reviewed-by: Luciano Coelho <coelho@ti.com>
Signed-off-by: Luciano Coelho <coelho@ti.com>
This commit is contained in:
Shahar Levi 2011-03-06 16:32:14 +02:00 committed by Luciano Coelho
parent ae77eccf04
commit ae47c45fd0
7 changed files with 117 additions and 22 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/net/wireless/wl12xx/boot.c
View File

@ -482,6 +482,8 @@ static int wl1271_boot_run_firmware(struct wl1271 *wl)
if (wl->bss_type == BSS_TYPE_AP_BSS)
wl->event_mask |= STA_REMOVE_COMPLETE_EVENT_ID;
else
wl->event_mask |= DUMMY_PACKET_EVENT_ID;
ret = wl1271_event_unmask(wl);
if (ret < 0) {

6
drivers/net/wireless/wl12xx/event.c
View File

@ -228,6 +228,12 @@ static int wl1271_event_process(struct wl1271 *wl, struct event_mailbox *mbox)
wl1271_event_rssi_trigger(wl, mbox);
}
if ((vector & DUMMY_PACKET_EVENT_ID) && !is_ap) {
wl1271_debug(DEBUG_EVENT, "DUMMY_PACKET_ID_EVENT_ID");
if (wl->vif)
wl1271_tx_dummy_packet(wl);
}
if (wl->vif && beacon_loss)
ieee80211_connection_loss(wl->vif);

5
drivers/net/wireless/wl12xx/event.h
View File

@ -59,7 +59,10 @@ enum {
BSS_LOSE_EVENT_ID = BIT(18),
REGAINED_BSS_EVENT_ID = BIT(19),
ROAMING_TRIGGER_MAX_TX_RETRY_EVENT_ID = BIT(20),
STA_REMOVE_COMPLETE_EVENT_ID = BIT(21), /* AP */
/* 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),
SOFT_GEMINI_PREDICTION_EVENT_ID = BIT(23),
SOFT_GEMINI_AVALANCHE_EVENT_ID = BIT(24),

1
drivers/net/wireless/wl12xx/io.h
View File

@ -170,5 +170,6 @@ struct ieee80211_hw *wl1271_alloc_hw(void);
int wl1271_free_hw(struct wl1271 *wl);
irqreturn_t wl1271_irq(int irq, void *data);
bool wl1271_set_block_size(struct wl1271 *wl);
int wl1271_tx_dummy_packet(struct wl1271 *wl);
#endif

42
drivers/net/wireless/wl12xx/main.c
View File

@ -1174,6 +1174,48 @@ static void wl1271_op_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
spin_unlock_irqrestore(&wl->wl_lock, flags);
}
#define TX_DUMMY_PACKET_SIZE 1400
int wl1271_tx_dummy_packet(struct wl1271 *wl)
{
struct sk_buff *skb = NULL;
struct ieee80211_hdr_3addr *hdr;
int ret = 0;
skb = dev_alloc_skb(
sizeof(struct wl1271_tx_hw_descr) + sizeof(*hdr) +
TX_DUMMY_PACKET_SIZE);
if (!skb) {
wl1271_warning("failed to allocate buffer for dummy packet");
ret = -ENOMEM;
goto out;
}
skb_reserve(skb, sizeof(struct wl1271_tx_hw_descr));
hdr = (struct ieee80211_hdr_3addr *) skb_put(skb, sizeof(*hdr));
memset(hdr, 0, sizeof(*hdr));
hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA |
IEEE80211_FCTL_TODS |
IEEE80211_STYPE_NULLFUNC);
memcpy(hdr->addr1, wl->bssid, ETH_ALEN);
memcpy(hdr->addr2, wl->mac_addr, ETH_ALEN);
memcpy(hdr->addr3, wl->bssid, ETH_ALEN);
skb_put(skb, TX_DUMMY_PACKET_SIZE);
memset(skb->data, 0, TX_DUMMY_PACKET_SIZE);
skb->pkt_type = TX_PKT_TYPE_DUMMY_REQ;
/* CONF_TX_AC_VO */
skb->queue_mapping = 0;
wl1271_op_tx(wl->hw, skb);
out:
return ret;
}
static struct notifier_block wl1271_dev_notifier = {
.notifier_call = wl1271_dev_notify,
};

77
drivers/net/wireless/wl12xx/tx.c
View File

@ -215,13 +215,29 @@ static void wl1271_tx_fill_hdr(struct wl1271 *wl, struct sk_buff *skb,
else
desc->life_time = cpu_to_le16(TX_HW_AP_MODE_PKT_LIFETIME_TU);
/* configure the tx attributes */
tx_attr = wl->session_counter << TX_HW_ATTR_OFST_SESSION_COUNTER;
/* queue (we use same identifiers for tid's and ac's */
ac = wl1271_tx_get_queue(skb_get_queue_mapping(skb));
desc->tid = ac;
if (skb->pkt_type == TX_PKT_TYPE_DUMMY_REQ) {
/*
* FW expects the dummy packet to have an invalid session id -
* any session id that is different than the one set in the join
*/
tx_attr = ((~wl->session_counter) <<
TX_HW_ATTR_OFST_SESSION_COUNTER) &
TX_HW_ATTR_SESSION_COUNTER;
tx_attr |= TX_HW_ATTR_TX_DUMMY_REQ;
/* Dummy packets require the TID to be management */
desc->tid = WL1271_TID_MGMT;
} else {
/* configure the tx attributes */
tx_attr =
wl->session_counter << TX_HW_ATTR_OFST_SESSION_COUNTER;
}
if (wl->bss_type != BSS_TYPE_AP_BSS) {
desc->aid = hlid;
@ -587,6 +603,12 @@ static void wl1271_tx_complete_packet(struct wl1271 *wl,
skb = wl->tx_frames[id];
info = IEEE80211_SKB_CB(skb);
if (skb->pkt_type == TX_PKT_TYPE_DUMMY_REQ) {
dev_kfree_skb(skb);
wl1271_free_tx_id(wl, id);
return;
}
/* update the TX status info */
if (result->status == TX_SUCCESS) {
if (!(info->flags & IEEE80211_TX_CTL_NO_ACK))
@ -716,10 +738,15 @@ void wl1271_tx_reset(struct wl1271 *wl)
while ((skb = skb_dequeue(&wl->tx_queue[i]))) {
wl1271_debug(DEBUG_TX, "freeing skb 0x%p",
skb);
info = IEEE80211_SKB_CB(skb);
info->status.rates[0].idx = -1;
info->status.rates[0].count = 0;
ieee80211_tx_status(wl->hw, skb);
if (skb->pkt_type == TX_PKT_TYPE_DUMMY_REQ) {
dev_kfree_skb(skb);
} else {
info = IEEE80211_SKB_CB(skb);
info->status.rates[0].idx = -1;
info->status.rates[0].count = 0;
ieee80211_tx_status(wl->hw, skb);
}
}
}
}
@ -740,21 +767,29 @@ void wl1271_tx_reset(struct wl1271 *wl)
wl1271_free_tx_id(wl, i);
wl1271_debug(DEBUG_TX, "freeing skb 0x%p", skb);
/* Remove private headers before passing the skb to mac80211 */
info = IEEE80211_SKB_CB(skb);
skb_pull(skb, sizeof(struct wl1271_tx_hw_descr));
if (info->control.hw_key &&
info->control.hw_key->cipher == WLAN_CIPHER_SUITE_TKIP) {
int hdrlen = ieee80211_get_hdrlen_from_skb(skb);
memmove(skb->data + WL1271_TKIP_IV_SPACE, skb->data,
hdrlen);
skb_pull(skb, WL1271_TKIP_IV_SPACE);
if (skb->pkt_type == TX_PKT_TYPE_DUMMY_REQ) {
dev_kfree_skb(skb);
} else {
/*
* Remove private headers before passing the skb to
* mac80211
*/
info = IEEE80211_SKB_CB(skb);
skb_pull(skb, sizeof(struct wl1271_tx_hw_descr));
if (info->control.hw_key &&
info->control.hw_key->cipher ==
WLAN_CIPHER_SUITE_TKIP) {
int hdrlen = ieee80211_get_hdrlen_from_skb(skb);
memmove(skb->data + WL1271_TKIP_IV_SPACE,
skb->data, hdrlen);
skb_pull(skb, WL1271_TKIP_IV_SPACE);
}
info->status.rates[0].idx = -1;
info->status.rates[0].count = 0;
ieee80211_tx_status(wl->hw, skb);
}
info->status.rates[0].idx = -1;
info->status.rates[0].count = 0;
ieee80211_tx_status(wl->hw, skb);
}
}

6
drivers/net/wireless/wl12xx/tx.h
View File

@ -41,6 +41,9 @@
BIT(8) | BIT(9))
#define TX_HW_ATTR_LAST_WORD_PAD (BIT(10) | BIT(11))
#define TX_HW_ATTR_TX_CMPLT_REQ BIT(12)
#define TX_HW_ATTR_TX_DUMMY_REQ BIT(13)
#define TX_PKT_TYPE_DUMMY_REQ 5
#define TX_HW_ATTR_OFST_SAVE_RETRIES 0
#define TX_HW_ATTR_OFST_HEADER_PAD 1
@ -55,6 +58,9 @@
#define WL1271_TX_ALIGN_TO 4
#define WL1271_TKIP_IV_SPACE 4
/* Used for management frames and dummy packets */
#define WL1271_TID_MGMT 7
struct wl127x_tx_mem {
/*
* Number of extra memory blocks to allocate for this packet