Merge branch 'perf/core' into perf/uprobes

Merge in latest upstream (and the latest perf development tree),
to prepare for tooling changes, and also to pick up v3.4 MM
changes that the uprobes code needs to take care of.

Signed-off-by: Ingo Molnar <mingo@kernel.org>

1 files changed, 130 insertions, 39 deletions

diff --git a/drivers/net/wireless/wl12xx/cmd.c b/drivers/net/wireless/wl12xx/cmd.c
index 25990bd38be..3414fc11e9b 100644
--- a/drivers/net/wireless/wl12xx/cmd.c
+++ b/drivers/net/wireless/wl12xx/cmd.c
@@ -459,23 +459,39 @@ out:
 
 int wl12xx_allocate_link(struct wl1271 *wl, struct wl12xx_vif *wlvif, u8 *hlid)
 {
+	unsigned long flags;
 	u8 link = find_first_zero_bit(wl->links_map, WL12XX_MAX_LINKS);
 	if (link >= WL12XX_MAX_LINKS)
 		return -EBUSY;
 
+	/* these bits are used by op_tx */
+	spin_lock_irqsave(&wl->wl_lock, flags);
 	__set_bit(link, wl->links_map);
 	__set_bit(link, wlvif->links_map);
+	spin_unlock_irqrestore(&wl->wl_lock, flags);
 	*hlid = link;
 	return 0;
 }
 
 void wl12xx_free_link(struct wl1271 *wl, struct wl12xx_vif *wlvif, u8 *hlid)
 {
+	unsigned long flags;
+
 	if (*hlid == WL12XX_INVALID_LINK_ID)
 		return;
 
+	/* these bits are used by op_tx */
+	spin_lock_irqsave(&wl->wl_lock, flags);
 	__clear_bit(*hlid, wl->links_map);
 	__clear_bit(*hlid, wlvif->links_map);
+	spin_unlock_irqrestore(&wl->wl_lock, flags);
+
+	/*
+	 * At this point op_tx() will not add more packets to the queues. We
+	 * can purge them.
+	 */
+	wl1271_tx_reset_link_queues(wl, *hlid);
+
 	*hlid = WL12XX_INVALID_LINK_ID;
 }
 
@@ -515,7 +531,7 @@ static int wl12xx_cmd_role_start_dev(struct wl1271 *wl,
 			goto out_free;
 	}
 	cmd->device.hlid = wlvif->dev_hlid;
-	cmd->device.session = wlvif->session_counter;
+	cmd->device.session = wl12xx_get_new_session_id(wl, wlvif);
 
 	wl1271_debug(DEBUG_CMD, "role start: roleid=%d, hlid=%d, session=%d",
 		     cmd->role_id, cmd->device.hlid, cmd->device.session);
@@ -566,7 +582,7 @@ static int wl12xx_cmd_role_stop_dev(struct wl1271 *wl,
 		goto out_free;
 	}
 
-	ret = wl1271_cmd_wait_for_event(wl, DISCONNECT_EVENT_COMPLETE_ID);
+	ret = wl1271_cmd_wait_for_event(wl, ROLE_STOP_COMPLETE_EVENT_ID);
 	if (ret < 0) {
 		wl1271_error("cmd role stop dev event completion error");
 		goto out_free;
@@ -715,6 +731,8 @@ int wl12xx_cmd_role_start_ap(struct wl1271 *wl, struct wl12xx_vif *wlvif)
 	cmd->ap.beacon_interval = cpu_to_le16(wlvif->beacon_int);
 	cmd->ap.dtim_interval = bss_conf->dtim_period;
 	cmd->ap.beacon_expiry = WL1271_AP_DEF_BEACON_EXP;
+	/* FIXME: Change when adding DFS */
+	cmd->ap.reset_tsf = 1;  /* By default reset AP TSF */
 	cmd->channel = wlvif->channel;
 
 	if (!bss_conf->hidden_ssid) {
@@ -994,7 +1012,7 @@ out:
 }
 
 int wl1271_cmd_ps_mode(struct wl1271 *wl, struct wl12xx_vif *wlvif,
-		       u8 ps_mode)
+		       u8 ps_mode, u16 auto_ps_timeout)
 {
 	struct wl1271_cmd_ps_params *ps_params = NULL;
 	int ret = 0;
@@ -1009,6 +1027,7 @@ int wl1271_cmd_ps_mode(struct wl1271 *wl, struct wl12xx_vif *wlvif,
 
 	ps_params->role_id = wlvif->role_id;
 	ps_params->ps_mode = ps_mode;
+	ps_params->auto_ps_timeout = auto_ps_timeout;
 
 	ret = wl1271_cmd_send(wl, CMD_SET_PS_MODE, ps_params,
 			      sizeof(*ps_params), 0);
@@ -1022,13 +1041,15 @@ out:
 	return ret;
 }
 
-int wl1271_cmd_template_set(struct wl1271 *wl, u16 template_id,
-			    void *buf, size_t buf_len, int index, u32 rates)
+int wl1271_cmd_template_set(struct wl1271 *wl, u8 role_id,
+			    u16 template_id, void *buf, size_t buf_len,
+			    int index, u32 rates)
 {
 	struct wl1271_cmd_template_set *cmd;
 	int ret = 0;
 
-	wl1271_debug(DEBUG_CMD, "cmd template_set %d", template_id);
+	wl1271_debug(DEBUG_CMD, "cmd template_set %d (role %d)",
+		     template_id, role_id);
 
 	WARN_ON(buf_len > WL1271_CMD_TEMPL_MAX_SIZE);
 	buf_len = min_t(size_t, buf_len, WL1271_CMD_TEMPL_MAX_SIZE);
@@ -1039,6 +1060,8 @@ int wl1271_cmd_template_set(struct wl1271 *wl, u16 template_id,
 		goto out;
 	}
 
+	/* during initialization wlvif is NULL */
+	cmd->role_id = role_id;
 	cmd->len = cpu_to_le16(buf_len);
 	cmd->template_type = template_id;
 	cmd->enabled_rates = cpu_to_le32(rates);
@@ -1082,7 +1105,8 @@ int wl12xx_cmd_build_null_data(struct wl1271 *wl, struct wl12xx_vif *wlvif)
 		ptr = skb->data;
 	}
 
-	ret = wl1271_cmd_template_set(wl, CMD_TEMPL_NULL_DATA, ptr, size, 0,
+	ret = wl1271_cmd_template_set(wl, wlvif->role_id,
+				      CMD_TEMPL_NULL_DATA, ptr, size, 0,
 				      wlvif->basic_rate);
 
 out:
@@ -1105,7 +1129,7 @@ int wl12xx_cmd_build_klv_null_data(struct wl1271 *wl,
 	if (!skb)
 		goto out;
 
-	ret = wl1271_cmd_template_set(wl, CMD_TEMPL_KLV,
+	ret = wl1271_cmd_template_set(wl, wlvif->role_id, CMD_TEMPL_KLV,
 				      skb->data, skb->len,
 				      CMD_TEMPL_KLV_IDX_NULL_DATA,
 				      wlvif->basic_rate);
@@ -1130,7 +1154,8 @@ int wl1271_cmd_build_ps_poll(struct wl1271 *wl, struct wl12xx_vif *wlvif,
 	if (!skb)
 		goto out;
 
-	ret = wl1271_cmd_template_set(wl, CMD_TEMPL_PS_POLL, skb->data,
+	ret = wl1271_cmd_template_set(wl, wlvif->role_id,
+				      CMD_TEMPL_PS_POLL, skb->data,
 				      skb->len, 0, wlvif->basic_rate_set);
 
 out:
@@ -1138,9 +1163,10 @@ out:
 	return ret;
 }
 
-int wl1271_cmd_build_probe_req(struct wl1271 *wl, struct wl12xx_vif *wlvif,
+int wl12xx_cmd_build_probe_req(struct wl1271 *wl, struct wl12xx_vif *wlvif,
+			       u8 role_id, u8 band,
 			       const u8 *ssid, size_t ssid_len,
-			       const u8 *ie, size_t ie_len, u8 band)
+			       const u8 *ie, size_t ie_len)
 {
 	struct ieee80211_vif *vif = wl12xx_wlvif_to_vif(wlvif);
 	struct sk_buff *skb;
@@ -1158,10 +1184,12 @@ int wl1271_cmd_build_probe_req(struct wl1271 *wl, struct wl12xx_vif *wlvif,
 
 	rate = wl1271_tx_min_rate_get(wl, wlvif->bitrate_masks[band]);
 	if (band == IEEE80211_BAND_2GHZ)
-		ret = wl1271_cmd_template_set(wl, CMD_TEMPL_CFG_PROBE_REQ_2_4,
+		ret = wl1271_cmd_template_set(wl, role_id,
+					      CMD_TEMPL_CFG_PROBE_REQ_2_4,
 					      skb->data, skb->len, 0, rate);
 	else
-		ret = wl1271_cmd_template_set(wl, CMD_TEMPL_CFG_PROBE_REQ_5,
+		ret = wl1271_cmd_template_set(wl, role_id,
+					      CMD_TEMPL_CFG_PROBE_REQ_5,
 					      skb->data, skb->len, 0, rate);
 
 out:
@@ -1186,10 +1214,12 @@ struct sk_buff *wl1271_cmd_build_ap_probe_req(struct wl1271 *wl,
 
 	rate = wl1271_tx_min_rate_get(wl, wlvif->bitrate_masks[wlvif->band]);
 	if (wlvif->band == IEEE80211_BAND_2GHZ)
-		ret = wl1271_cmd_template_set(wl, CMD_TEMPL_CFG_PROBE_REQ_2_4,
+		ret = wl1271_cmd_template_set(wl, wlvif->role_id,
+					      CMD_TEMPL_CFG_PROBE_REQ_2_4,
 					      skb->data, skb->len, 0, rate);
 	else
-		ret = wl1271_cmd_template_set(wl, CMD_TEMPL_CFG_PROBE_REQ_5,
+		ret = wl1271_cmd_template_set(wl, wlvif->role_id,
+					      CMD_TEMPL_CFG_PROBE_REQ_5,
 					      skb->data, skb->len, 0, rate);
 
 	if (ret < 0)
@@ -1199,32 +1229,34 @@ out:
 	return skb;
 }
 
-int wl1271_cmd_build_arp_rsp(struct wl1271 *wl, struct wl12xx_vif *wlvif,
-			     __be32 ip_addr)
+int wl1271_cmd_build_arp_rsp(struct wl1271 *wl, struct wl12xx_vif *wlvif)
 {
-	int ret;
+	int ret, extra;
+	u16 fc;
 	struct ieee80211_vif *vif = wl12xx_wlvif_to_vif(wlvif);
-	struct wl12xx_arp_rsp_template tmpl;
+	struct sk_buff *skb;
+	struct wl12xx_arp_rsp_template *tmpl;
 	struct ieee80211_hdr_3addr *hdr;
 	struct arphdr *arp_hdr;
 
-	memset(&tmpl, 0, sizeof(tmpl));
+	skb = dev_alloc_skb(sizeof(*hdr) + sizeof(__le16) + sizeof(*tmpl) +
+			    WL1271_EXTRA_SPACE_MAX);
+	if (!skb) {
+		wl1271_error("failed to allocate buffer for arp rsp template");
+		return -ENOMEM;
+	}
 
-	/* mac80211 header */
-	hdr = &tmpl.hdr;
-	hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA |
-					 IEEE80211_STYPE_DATA |
-					 IEEE80211_FCTL_TODS);
-	memcpy(hdr->addr1, vif->bss_conf.bssid, ETH_ALEN);
-	memcpy(hdr->addr2, vif->addr, ETH_ALEN);
-	memset(hdr->addr3, 0xff, ETH_ALEN);
+	skb_reserve(skb, sizeof(*hdr) + WL1271_EXTRA_SPACE_MAX);
+
+	tmpl = (struct wl12xx_arp_rsp_template *)skb_put(skb, sizeof(*tmpl));
+	memset(tmpl, 0, sizeof(tmpl));
 
 	/* llc layer */
-	memcpy(tmpl.llc_hdr, rfc1042_header, sizeof(rfc1042_header));
-	tmpl.llc_type = cpu_to_be16(ETH_P_ARP);
+	memcpy(tmpl->llc_hdr, rfc1042_header, sizeof(rfc1042_header));
+	tmpl->llc_type = cpu_to_be16(ETH_P_ARP);
 
 	/* arp header */
-	arp_hdr = &tmpl.arp_hdr;
+	arp_hdr = &tmpl->arp_hdr;
 	arp_hdr->ar_hrd = cpu_to_be16(ARPHRD_ETHER);
 	arp_hdr->ar_pro = cpu_to_be16(ETH_P_IP);
 	arp_hdr->ar_hln = ETH_ALEN;
@@ -1232,13 +1264,59 @@ int wl1271_cmd_build_arp_rsp(struct wl1271 *wl, struct wl12xx_vif *wlvif,
 	arp_hdr->ar_op = cpu_to_be16(ARPOP_REPLY);
 
 	/* arp payload */
-	memcpy(tmpl.sender_hw, vif->addr, ETH_ALEN);
-	tmpl.sender_ip = ip_addr;
+	memcpy(tmpl->sender_hw, vif->addr, ETH_ALEN);
+	tmpl->sender_ip = wlvif->ip_addr;
 
-	ret = wl1271_cmd_template_set(wl, CMD_TEMPL_ARP_RSP,
-				      &tmpl, sizeof(tmpl), 0,
-				      wlvif->basic_rate);
+	/* encryption space */
+	switch (wlvif->encryption_type) {
+	case KEY_TKIP:
+		extra = WL1271_EXTRA_SPACE_TKIP;
+		break;
+	case KEY_AES:
+		extra = WL1271_EXTRA_SPACE_AES;
+		break;
+	case KEY_NONE:
+	case KEY_WEP:
+	case KEY_GEM:
+		extra = 0;
+		break;
+	default:
+		wl1271_warning("Unknown encryption type: %d",
+			       wlvif->encryption_type);
+		ret = -EINVAL;
+		goto out;
+	}
+
+	if (extra) {
+		u8 *space = skb_push(skb, extra);
+		memset(space, 0, extra);
+	}
+
+	/* QoS header - BE */
+	if (wlvif->sta.qos)
+		memset(skb_push(skb, sizeof(__le16)), 0, sizeof(__le16));
 
+	/* mac80211 header */
+	hdr = (struct ieee80211_hdr_3addr *)skb_push(skb, sizeof(*hdr));
+	memset(hdr, 0, sizeof(hdr));
+	fc = IEEE80211_FTYPE_DATA | IEEE80211_FCTL_TODS;
+	if (wlvif->sta.qos)
+		fc |= IEEE80211_STYPE_QOS_DATA;
+	else
+		fc |= IEEE80211_STYPE_DATA;
+	if (wlvif->encryption_type != KEY_NONE)
+		fc |= IEEE80211_FCTL_PROTECTED;
+
+	hdr->frame_control = cpu_to_le16(fc);
+	memcpy(hdr->addr1, vif->bss_conf.bssid, ETH_ALEN);
+	memcpy(hdr->addr2, vif->addr, ETH_ALEN);
+	memset(hdr->addr3, 0xff, ETH_ALEN);
+
+	ret = wl1271_cmd_template_set(wl, wlvif->role_id, CMD_TEMPL_ARP_RSP,
+				      skb->data, skb->len, 0,
+				      wlvif->basic_rate);
+out:
+	dev_kfree_skb(skb);
 	return ret;
 }
 
@@ -1260,7 +1338,8 @@ int wl1271_build_qos_null_data(struct wl1271 *wl, struct ieee80211_vif *vif)
 	/* FIXME: not sure what priority to use here */
 	template.qos_ctrl = cpu_to_le16(0);
 
-	return wl1271_cmd_template_set(wl, CMD_TEMPL_QOS_NULL_DATA, &template,
+	return wl1271_cmd_template_set(wl, wlvif->role_id,
+				       CMD_TEMPL_QOS_NULL_DATA, &template,
 				       sizeof(template), 0,
 				       wlvif->basic_rate);
 }
@@ -1739,11 +1818,20 @@ int wl12xx_croc(struct wl1271 *wl, u8 role_id)
 		goto out;
 
 	__clear_bit(role_id, wl->roc_map);
+
+	/*
+	 * Rearm the tx watchdog when removing the last ROC. This prevents
+	 * recoveries due to just finished ROCs - when Tx hasn't yet had
+	 * a chance to get out.
+	 */
+	if (find_first_bit(wl->roc_map, WL12XX_MAX_ROLES) >= WL12XX_MAX_ROLES)
+		wl12xx_rearm_tx_watchdog_locked(wl);
 out:
 	return ret;
 }
 
 int wl12xx_cmd_channel_switch(struct wl1271 *wl,
+			      struct wl12xx_vif *wlvif,
 			      struct ieee80211_channel_switch *ch_switch)
 {
 	struct wl12xx_cmd_channel_switch *cmd;
@@ -1757,10 +1845,13 @@ int wl12xx_cmd_channel_switch(struct wl1271 *wl,
 		goto out;
 	}
 
+	cmd->role_id = wlvif->role_id;
 	cmd->channel = ch_switch->channel->hw_value;
 	cmd->switch_time = ch_switch->count;
-	cmd->tx_suspend = ch_switch->block_tx;
-	cmd->flush = 0; /* this value is ignored by the FW */
+	cmd->stop_tx = ch_switch->block_tx;
+
+	/* FIXME: control from mac80211 in the future */
+	cmd->post_switch_tx_disable = 0;  /* Enable TX on the target channel */
 
 	ret = wl1271_cmd_send(wl, CMD_CHANNEL_SWITCH, cmd, sizeof(*cmd), 0);
 	if (ret < 0) {