[PATCH] ieee80211: Add QoS (WME) support to the ieee80211 subsystem

tree a3ad796273e98036eb0e9fc063225070fa24508a
parent 1b9c0aeb377abf8e4a43a86cff42382f74ca0259
author Mohamed Abbas <mabbas@linux.intel.com> 1124447069 -0500
committer James Ketrenos <jketreno@linux.intel.com> 1127313435 -0500

Add QoS (WME) support to the ieee80211 subsystem.

NOTE: This requires drivers that use the ieee80211 hard_start_xmit
(ipw2100 and ipw2200) to add the priority parameter to their callback.
Signed-off-by: James Ketrenos <jketreno@linux.intel.com>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>

include/net/ieee80211.h

@@ -92,6 +92,7 @@
 #define IEEE80211_STYPE_CFACK		0x0050
 #define IEEE80211_STYPE_CFPOLL		0x0060
 #define IEEE80211_STYPE_CFACKPOLL	0x0070
+#define IEEE80211_STYPE_QOS_DATA        0x0080
 
 #define IEEE80211_SCTL_FRAG		0x000F
 #define IEEE80211_SCTL_SEQ		0xFFF0
@@ -153,6 +154,7 @@ const char *escape_essid(const char *essid, u8 essid_len);
 
 #define IEEE80211_DL_TX            (1<<8)
 #define IEEE80211_DL_RX            (1<<9)
+#define IEEE80211_DL_QOS           (1<<31)
 
 #define IEEE80211_ERROR(f, a...) printk(KERN_ERR "ieee80211: " f, ## a)
 #define IEEE80211_WARNING(f, a...) printk(KERN_WARNING "ieee80211: " f, ## a)
@@ -166,6 +168,7 @@ const char *escape_essid(const char *essid, u8 essid_len);
 #define IEEE80211_DEBUG_DROP(f, a...)  IEEE80211_DEBUG(IEEE80211_DL_DROP, f, ## a)
 #define IEEE80211_DEBUG_TX(f, a...)  IEEE80211_DEBUG(IEEE80211_DL_TX, f, ## a)
 #define IEEE80211_DEBUG_RX(f, a...)  IEEE80211_DEBUG(IEEE80211_DL_RX, f, ## a)
+#define IEEE80211_DEBUG_QOS(f, a...)  IEEE80211_DEBUG(IEEE80211_DL_QOS, f, ## a)
 #include <linux/netdevice.h>
 #include <linux/wireless.h>
 #include <linux/if_arp.h>	/* ARPHRD_ETHER */
@@ -493,6 +496,7 @@ enum ieee80211_mfie {
 	MFIE_TYPE_RSN = 48,
 	MFIE_TYPE_RATES_EX = 50,
 	MFIE_TYPE_GENERIC = 221,
+	MFIE_TYPE_QOS_PARAMETER = 222,
 };
 
 /* Minimal header; can be used for passing 802.11 frames with sufficient
@@ -540,6 +544,29 @@ struct ieee80211_hdr_4addr {
 	u8 payload[0];
 } __attribute__ ((packed));
 
+struct ieee80211_hdr_3addrqos {
+	u16 frame_ctl;
+	u16 duration_id;
+	u8 addr1[ETH_ALEN];
+	u8 addr2[ETH_ALEN];
+	u8 addr3[ETH_ALEN];
+	u16 seq_ctl;
+	u8 payload[0];
+	u16 qos_ctl;
+} __attribute__ ((packed));
+
+struct ieee80211_hdr_4addrqos {
+	u16 frame_ctl;
+	u16 duration_id;
+	u8 addr1[ETH_ALEN];
+	u8 addr2[ETH_ALEN];
+	u8 addr3[ETH_ALEN];
+	u16 seq_ctl;
+	u8 addr4[ETH_ALEN];
+	u8 payload[0];
+	u16 qos_ctl;
+} __attribute__ ((packed));
+
 struct ieee80211_info_element {
 	u8 id;
 	u8 len;
@@ -645,6 +672,65 @@ struct ieee80211_txb {
 #define NETWORK_HAS_OFDM       (1<<1)
 #define NETWORK_HAS_CCK        (1<<2)
 
+/* QoS structure */
+#define NETWORK_HAS_QOS_PARAMETERS      (1<<3)
+#define NETWORK_HAS_QOS_INFORMATION     (1<<4)
+#define NETWORK_HAS_QOS_MASK            (NETWORK_HAS_QOS_PARAMETERS | NETWORK_HAS_QOS_INFORMATION)
+
+#define QOS_QUEUE_NUM                   4
+#define QOS_OUI_LEN                     3
+#define QOS_OUI_TYPE                    2
+#define QOS_ELEMENT_ID                  221
+#define QOS_OUI_INFO_SUB_TYPE           0
+#define QOS_OUI_PARAM_SUB_TYPE          1
+#define QOS_VERSION_1                   1
+#define QOS_AIFSN_MIN_VALUE             2
+
+struct ieee80211_qos_information_element {
+	u8 elementID;
+	u8 length;
+	u8 qui[QOS_OUI_LEN];
+	u8 qui_type;
+	u8 qui_subtype;
+	u8 version;
+	u8 ac_info;
+} __attribute__ ((packed));
+
+struct ieee80211_qos_ac_parameter {
+	u8 aci_aifsn;
+	u8 ecw_min_max;
+	u16 tx_op_limit;
+} __attribute__ ((packed));
+
+struct ieee80211_qos_parameter_info {
+	struct ieee80211_qos_information_element info_element;
+	u8 reserved;
+	struct ieee80211_qos_ac_parameter ac_params_record[QOS_QUEUE_NUM];
+} __attribute__ ((packed));
+
+struct ieee80211_qos_parameters {
+	u16 cw_min[QOS_QUEUE_NUM];
+	u16 cw_max[QOS_QUEUE_NUM];
+	u8 aifs[QOS_QUEUE_NUM];
+	u8 flag[QOS_QUEUE_NUM];
+	u16 tx_op_limit[QOS_QUEUE_NUM];
+} __attribute__ ((packed));
+
+struct ieee80211_qos_data {
+	struct ieee80211_qos_parameters parameters;
+	int active;
+	int supported;
+	u8 param_count;
+	u8 old_param_count;
+};
+
+struct ieee80211_tim_parameters {
+	u8 tim_count;
+	u8 tim_period;
+} __attribute__ ((packed));
+
+/*******************************************************/
+
 struct ieee80211_network {
 	/* These entries are used to identify a unique network */
 	u8 bssid[ETH_ALEN];
@@ -653,6 +739,8 @@ struct ieee80211_network {
 	u8 ssid[IW_ESSID_MAX_SIZE + 1];
 	u8 ssid_len;
 
+	struct ieee80211_qos_data qos_data;
+
 	/* These are network statistics */
 	struct ieee80211_rx_stats stats;
 	u16 capability;
@@ -672,6 +760,7 @@ struct ieee80211_network {
 	size_t wpa_ie_len;
 	u8 rsn_ie[MAX_WPA_IE_LEN];
 	size_t rsn_ie_len;
+	struct ieee80211_tim_parameters tim;
 	struct list_head list;
 };
 
@@ -769,10 +858,13 @@ struct ieee80211_device {
 	void (*set_security) (struct net_device * dev,
 			      struct ieee80211_security * sec);
 	int (*hard_start_xmit) (struct ieee80211_txb * txb,
-				struct net_device * dev);
+				struct net_device * dev, int pri);
 	int (*reset_port) (struct net_device * dev);
 	int (*is_queue_full) (struct net_device * dev, int pri);
 
+	int (*handle_management) (struct net_device * dev,
+				  struct ieee80211_network * network, u16 type);
+
 	/* Typical STA methods */
 	int (*handle_auth) (struct net_device * dev,
 			    struct ieee80211_auth * auth);
@@ -854,11 +946,14 @@ extern inline int ieee80211_is_valid_mode(struct ieee80211_device *ieee,
 extern inline int ieee80211_get_hdrlen(u16 fc)
 {
 	int hdrlen = IEEE80211_3ADDR_LEN;
+	u16 stype = WLAN_FC_GET_STYPE(fc);
 
 	switch (WLAN_FC_GET_TYPE(fc)) {
 	case IEEE80211_FTYPE_DATA:
 		if ((fc & IEEE80211_FCTL_FROMDS) && (fc & IEEE80211_FCTL_TODS))
 			hdrlen = IEEE80211_4ADDR_LEN;
+		if (stype & IEEE80211_STYPE_QOS_DATA)
+			hdrlen += 2;
 		break;
 	case IEEE80211_FTYPE_CTL:
 		switch (WLAN_FC_GET_STYPE(fc)) {

net/ieee80211/ieee80211_tx.c

@@ -465,7 +465,7 @@ int ieee80211_xmit(struct sk_buff *skb, struct net_device *dev)
 	dev_kfree_skb_any(skb);
 
 	if (txb) {
-		int ret = (*ieee->hard_start_xmit) (txb, dev);
+		int ret = (*ieee->hard_start_xmit) (txb, dev, priority);
 		if (ret == 0) {
 			stats->tx_packets++;
 			stats->tx_bytes += txb->payload_size;
@@ -500,6 +500,7 @@ int ieee80211_tx_frame(struct ieee80211_device *ieee,
 	unsigned long flags;
 	struct net_device_stats *stats = &ieee->stats;
 	struct sk_buff *skb_frag;
+	int priority = -1;
 
 	spin_lock_irqsave(&ieee->lock, flags);
 
@@ -540,7 +541,7 @@ int ieee80211_tx_frame(struct ieee80211_device *ieee,
 	spin_unlock_irqrestore(&ieee->lock, flags);
 
 	if (txb) {
-		if ((*ieee->hard_start_xmit) (txb, ieee->dev) == 0) {
+		if ((*ieee->hard_start_xmit) (txb, ieee->dev, priority) == 0) {
 			stats->tx_packets++;
 			stats->tx_bytes += txb->payload_size;
 			return 0;