split Atheros SuperG support out into it's own file that's included only

with a new IEEE80211_SUPPORT_SUPERG option

1 files changed, 26 insertions, 211 deletions

diff --git a/sys/net80211/ieee80211_output.c b/sys/net80211/ieee80211_output.c
index 66b8c94..1e5788b 100644
--- a/sys/net80211/ieee80211_output.c
+++ b/sys/net80211/ieee80211_output.c
@@ -47,6 +47,9 @@ __FBSDID("$FreeBSD$");
 
 #include <net80211/ieee80211_var.h>
 #include <net80211/ieee80211_regdomain.h>
+#ifdef IEEE80211_SUPPORT_SUPERG
+#include <net80211/ieee80211_superg.h>
+#endif
 #ifdef IEEE80211_SUPPORT_TDMA
 #include <net80211/ieee80211_tdma.h>
 #endif
@@ -62,9 +65,6 @@ __FBSDID("$FreeBSD$");
 #define	ETHER_HEADER_COPY(dst, src) \
 	memcpy(dst, src, sizeof(struct ether_header))
 
-static struct mbuf *ieee80211_encap_fastframe(struct ieee80211vap *,
-	struct mbuf *m1, const struct ether_header *eh1,
-	struct mbuf *m2, const struct ether_header *eh2);
 static int ieee80211_fragment(struct ieee80211vap *, struct mbuf *,
 	u_int hdrsize, u_int ciphdrsize, u_int mtu);
 static	void ieee80211_tx_mgt_cb(struct ieee80211_node *, void *, int);
@@ -731,7 +731,7 @@ done:
  * Drivers and cipher modules assume we have done the necessary work
  * and fail rudely if they don't find the space they need.
  */
-static struct mbuf *
+struct mbuf *
 ieee80211_mbuf_adjust(struct ieee80211vap *vap, int hdrsize,
 	struct ieee80211_key *key, struct mbuf *m)
 {
@@ -861,7 +861,7 @@ ieee80211_encap(struct ieee80211_node *ni, struct mbuf *m)
 	struct ieee80211_frame *wh;
 	struct ieee80211_key *key;
 	struct llc *llc;
-	int hdrsize, hdrspace, datalen, addqos, txfrag, isff, is4addr;
+	int hdrsize, hdrspace, datalen, addqos, txfrag, is4addr;
 
 	/*
 	 * Copy existing Ethernet header to a safe place.  The
@@ -935,56 +935,7 @@ ieee80211_encap(struct ieee80211_node *ni, struct mbuf *m)
 	else
 		hdrspace = hdrsize;
 
-	if ((isff = m->m_flags & M_FF) != 0) {
-		struct mbuf *m2;
-		struct ether_header eh2;
-
-		/*
-		 * Fast frame encapsulation.  There must be two packets
-		 * chained with m_nextpkt.  We do header adjustment for
-		 * each, add the tunnel encapsulation, and then concatenate
-		 * the mbuf chains to form a single frame for transmission.
-		 */
-		m2 = m->m_nextpkt;
-		if (m2 == NULL) {
-			IEEE80211_DPRINTF(vap, IEEE80211_MSG_SUPERG,
-				"%s: only one frame\n", __func__);
-			goto bad;
-		}
-		m->m_nextpkt = NULL;
-		/*
-		 * Include fast frame headers in adjusting header
-		 * layout; this allocates space according to what
-		 * ieee80211_encap_fastframe will do.
-		 */
-		m = ieee80211_mbuf_adjust(vap,
-			hdrspace + sizeof(struct llc) + sizeof(uint32_t) + 2 +
-			    sizeof(struct ether_header),
-			key, m);
-		if (m == NULL) {
-			/* NB: ieee80211_mbuf_adjust handles msgs+statistics */
-			m_freem(m2);
-			goto bad;
-		}
-		/*
-		 * Copy second frame's Ethernet header out of line
-		 * and adjust for encapsulation headers.  Note that
-		 * we make room for padding in case there isn't room
-		 * at the end of first frame.
-		 */
-		KASSERT(m2->m_len >= sizeof(eh2), ("no ethernet header!"));
-		ETHER_HEADER_COPY(&eh2, mtod(m2, caddr_t));
-		m2 = ieee80211_mbuf_adjust(vap,
-			ATH_FF_MAX_HDR_PAD + sizeof(struct ether_header),
-			NULL, m2);
-		if (m2 == NULL) {
-			/* NB: ieee80211_mbuf_adjust handles msgs+statistics */
-			goto bad;
-		}
-		m = ieee80211_encap_fastframe(vap, m, &eh, m2, &eh2);
-		if (m == NULL)
-			goto bad;
-	} else {
+	if (__predict_true((m->m_flags & M_FF) == 0)) {
 		/*
 		 * Normal frame.
 		 */
@@ -1002,6 +953,12 @@ ieee80211_encap(struct ieee80211_node *ni, struct mbuf *m)
 		llc->llc_snap.org_code[1] = 0;
 		llc->llc_snap.org_code[2] = 0;
 		llc->llc_snap.ether_type = eh.ether_type;
+	} else {
+#ifdef IEEE80211_SUPPORT_SUPERG
+		m = ieee80211_ff_encap(vap, m, hdrspace, key);
+		if (m == NULL)
+#endif
+			goto bad;
 	}
 	datalen = m->m_pkthdr.len;		/* NB: w/o 802.11 header */
 
@@ -1047,7 +1004,7 @@ ieee80211_encap(struct ieee80211_node *ni, struct mbuf *m)
 	case IEEE80211_M_WDS:		/* NB: is4addr should always be true */
 		goto bad;
 	}
-	if (m->m_flags & M_MORE_DATA)
+		if (m->m_flags & M_MORE_DATA)
 		wh->i_fc[1] |= IEEE80211_FC1_MORE_DATA;
 	if (addqos) {
 		uint8_t *qos;
@@ -1128,7 +1085,7 @@ ieee80211_encap(struct ieee80211_node *ni, struct mbuf *m)
 	txfrag = (m->m_pkthdr.len > vap->iv_fragthreshold &&
 	    !IEEE80211_IS_MULTICAST(wh->i_addr1) &&
 	    (vap->iv_caps & IEEE80211_C_TXFRAG) &&
-	    !isff);		/* NB: don't fragment ff's */
+	    (m->m_flags & M_FF) == 0);		/* NB: don't fragment ff's */
 	if (key != NULL) {
 		/*
 		 * IEEE 802.1X: send EAPOL frames always in the clear.
@@ -1175,135 +1132,6 @@ bad:
 }
 
 /*
- * Do Ethernet-LLC encapsulation for each payload in a fast frame
- * tunnel encapsulation.  The frame is assumed to have an Ethernet
- * header at the front that must be stripped before prepending the
- * LLC followed by the Ethernet header passed in (with an Ethernet
- * type that specifies the payload size).
- */
-static struct mbuf *
-ieee80211_encap1(struct ieee80211vap *vap, struct mbuf *m,
-	const struct ether_header *eh)
-{
-	struct llc *llc;
-	uint16_t payload;
-
-	/* XXX optimize by combining m_adj+M_PREPEND */
-	m_adj(m, sizeof(struct ether_header) - sizeof(struct llc));
-	llc = mtod(m, struct llc *);
-	llc->llc_dsap = llc->llc_ssap = LLC_SNAP_LSAP;
-	llc->llc_control = LLC_UI;
-	llc->llc_snap.org_code[0] = 0;
-	llc->llc_snap.org_code[1] = 0;
-	llc->llc_snap.org_code[2] = 0;
-	llc->llc_snap.ether_type = eh->ether_type;
-	payload = m->m_pkthdr.len;		/* NB: w/o Ethernet header */
-
-	M_PREPEND(m, sizeof(struct ether_header), M_DONTWAIT);
-	if (m == NULL) {		/* XXX cannot happen */
-		IEEE80211_DPRINTF(vap, IEEE80211_MSG_SUPERG,
-			"%s: no space for ether_header\n", __func__);
-		vap->iv_stats.is_tx_nobuf++;
-		return NULL;
-	}
-	ETHER_HEADER_COPY(mtod(m, void *), eh);
-	mtod(m, struct ether_header *)->ether_type = htons(payload);
-	return m;
-}
-
-/*
- * Do fast frame tunnel encapsulation.  The two frames and
- * Ethernet headers are supplied.  The caller is assumed to
- * have arrange for space in the mbuf chains for encapsulating
- * headers (to avoid major mbuf fragmentation).
- *
- * The encapsulated frame is returned or NULL if there is a
- * problem (should not happen).
- */
-static struct mbuf *
-ieee80211_encap_fastframe(struct ieee80211vap *vap,
-	struct mbuf *m1, const struct ether_header *eh1,
-	struct mbuf *m2, const struct ether_header *eh2)
-{
-	struct llc *llc;
-	struct mbuf *m;
-	int pad;
-
-	/*
-	 * First, each frame gets a standard encapsulation.
-	 */
-	m1 = ieee80211_encap1(vap, m1, eh1);
-	if (m1 == NULL) {
-		m_freem(m2);
-		return NULL;
-	}
-	m2 = ieee80211_encap1(vap, m2, eh2);
-	if (m2 == NULL) {
-		m_freem(m1);
-		return NULL;
-	}
-
-	/*
-	 * Pad leading frame to a 4-byte boundary.  If there
-	 * is space at the end of the first frame, put it
-	 * there; otherwise prepend to the front of the second
-	 * frame.  We know doing the second will always work
-	 * because we reserve space above.  We prefer appending
-	 * as this typically has better DMA alignment properties.
-	 */
-	for (m = m1; m->m_next != NULL; m = m->m_next)
-		;
-	pad = roundup2(m1->m_pkthdr.len, 4) - m1->m_pkthdr.len;
-	if (pad) {
-		if (M_TRAILINGSPACE(m) < pad) {		/* prepend to second */
-			m2->m_data -= pad;
-			m2->m_len += pad;
-			m2->m_pkthdr.len += pad;
-		} else {				/* append to first */
-			m->m_len += pad;
-			m1->m_pkthdr.len += pad;
-		}
-	}
-
-	/*
-	 * Now, stick 'em together and prepend the tunnel headers;
-	 * first the Atheros tunnel header (all zero for now) and
-	 * then a special fast frame LLC.
-	 *
-	 * XXX optimize by prepending together
-	 */
-	m->m_next = m2;			/* NB: last mbuf from above */
-	m1->m_pkthdr.len += m2->m_pkthdr.len;
-	M_PREPEND(m1, sizeof(uint32_t)+2, M_DONTWAIT);
-	if (m1 == NULL) {		/* XXX cannot happen */
-		IEEE80211_DPRINTF(vap, IEEE80211_MSG_SUPERG,
-			"%s: no space for tunnel header\n", __func__);
-		vap->iv_stats.is_tx_nobuf++;
-		return NULL;
-	}
-	memset(mtod(m1, void *), 0, sizeof(uint32_t)+2);
-
-	M_PREPEND(m1, sizeof(struct llc), M_DONTWAIT);
-	if (m1 == NULL) {		/* XXX cannot happen */
-		IEEE80211_DPRINTF(vap, IEEE80211_MSG_SUPERG,
-			"%s: no space for llc header\n", __func__);
-		vap->iv_stats.is_tx_nobuf++;
-		return NULL;
-	}
-	llc = mtod(m1, struct llc *);
-	llc->llc_dsap = llc->llc_ssap = LLC_SNAP_LSAP;
-	llc->llc_control = LLC_UI;
-	llc->llc_snap.org_code[0] = ATH_FF_SNAP_ORGCODE_0;
-	llc->llc_snap.org_code[1] = ATH_FF_SNAP_ORGCODE_1;
-	llc->llc_snap.org_code[2] = ATH_FF_SNAP_ORGCODE_2;
-	llc->llc_snap.ether_type = htons(ATH_FF_ETH_TYPE);
-
-	vap->iv_stats.is_ff_encap++;
-
-	return m1;
-}
-
-/*
  * Fragment the frame according to the specified mtu.
  * The size of the 802.11 header (w/o padding) is provided
  * so we don't need to recalculate it.  We create a new
@@ -1568,31 +1396,6 @@ ieee80211_add_wme_param(uint8_t *frm, struct ieee80211_wme_state *wme)
 }
 #undef WME_OUI_BYTES
 
-#define	ATH_OUI_BYTES		0x00, 0x03, 0x7f
-/*
- * Add a WME information element to a frame.
- */
-static uint8_t *
-ieee80211_add_ath(uint8_t *frm, uint8_t caps, uint16_t defkeyix)
-{
-	static const struct ieee80211_ath_ie info = {
-		.ath_id		= IEEE80211_ELEMID_VENDOR,
-		.ath_len	= sizeof(struct ieee80211_ath_ie) - 2,
-		.ath_oui	= { ATH_OUI_BYTES },
-		.ath_oui_type	= ATH_OUI_TYPE,
-		.ath_oui_subtype= ATH_OUI_SUBTYPE,
-		.ath_version	= ATH_OUI_VERSION,
-	};
-	struct ieee80211_ath_ie *ath = (struct ieee80211_ath_ie *) frm;
-
-	memcpy(frm, &info, sizeof(info));
-	ath->ath_capability = caps;
-	ath->ath_defkeyix[0] = (defkeyix & 0xff);
-	ath->ath_defkeyix[1] = ((defkeyix >> 8) & 0xff);
-	return frm + sizeof(info); 
-}
-#undef ATH_OUI_BYTES
-
 /*
  * Add an 11h Power Constraint element to a frame.
  */
@@ -1977,7 +1780,9 @@ ieee80211_send_mgmt(struct ieee80211_node *ni, int type, int arg)
 		       + sizeof(struct ieee80211_wme_info)
 		       + sizeof(struct ieee80211_ie_htcap)
 		       + 4 + sizeof(struct ieee80211_ie_htcap)
+#ifdef IEEE80211_SUPPORT_SUPERG
 		       + sizeof(struct ieee80211_ath_ie)
+#endif
 		       + (vap->iv_appie_wpa != NULL ?
 				vap->iv_appie_wpa->ie_len : 0)
 		       + (vap->iv_appie_assocreq != NULL ?
@@ -2046,6 +1851,7 @@ ieee80211_send_mgmt(struct ieee80211_node *ni, int type, int arg)
 		    ni->ni_ies.htcap_ie != NULL &&
 		    ni->ni_ies.htcap_ie[0] == IEEE80211_ELEMID_VENDOR)
 			frm = ieee80211_add_htcap_vendor(frm, ni);
+#ifdef IEEE80211_SUPPORT_SUPERG
 		if (IEEE80211_ATH_CAP(vap, ni, IEEE80211_F_ATHEROS))
 			frm = ieee80211_add_ath(frm,
 				IEEE80211_ATH_CAP(vap, ni, IEEE80211_F_ATHEROS),
@@ -2053,6 +1859,7 @@ ieee80211_send_mgmt(struct ieee80211_node *ni, int type, int arg)
 				ni->ni_authmode != IEEE80211_AUTH_8021X &&
 				vap->iv_def_txkey != IEEE80211_KEYIX_NONE ?
 				vap->iv_def_txkey : 0x7fff);
+#endif /* IEEE80211_SUPPORT_SUPERG */
 		if (vap->iv_appie_assocreq != NULL)
 			frm = add_appie(frm, vap->iv_appie_assocreq);
 		m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
@@ -2088,7 +1895,9 @@ ieee80211_send_mgmt(struct ieee80211_node *ni, int type, int arg)
 		       + sizeof(struct ieee80211_ie_htcap) + 4
 		       + sizeof(struct ieee80211_ie_htinfo) + 4
 		       + sizeof(struct ieee80211_wme_param)
+#ifdef IEEE80211_SUPPORT_SUPERG
 		       + sizeof(struct ieee80211_ath_ie)
+#endif
 		       + (vap->iv_appie_assocresp != NULL ?
 				vap->iv_appie_assocresp->ie_len : 0)
 		);
@@ -2123,10 +1932,12 @@ ieee80211_send_mgmt(struct ieee80211_node *ni, int type, int arg)
 			frm = ieee80211_add_htcap_vendor(frm, ni);
 			frm = ieee80211_add_htinfo_vendor(frm, ni);
 		}
+#ifdef IEEE80211_SUPPORT_SUPERG
 		if (IEEE80211_ATH_CAP(vap, ni, IEEE80211_F_ATHEROS))
 			frm = ieee80211_add_ath(frm,
 				IEEE80211_ATH_CAP(vap, ni, IEEE80211_F_ATHEROS),
 				ni->ni_ath_defkeyix);
+#endif /* IEEE80211_SUPPORT_SUPERG */
 		if (vap->iv_appie_assocresp != NULL)
 			frm = add_appie(frm, vap->iv_appie_assocresp);
 		m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
@@ -2227,7 +2038,9 @@ ieee80211_alloc_proberesp(struct ieee80211_node *bss, int legacy)
 	       + sizeof(struct ieee80211_wme_param)
 	       + 4 + sizeof(struct ieee80211_ie_htcap)
 	       + 4 + sizeof(struct ieee80211_ie_htinfo)
+#ifdef IEEE80211_SUPPORT_SUPERG
 	       + sizeof(struct ieee80211_ath_ie)
+#endif
 	       + (vap->iv_appie_proberesp != NULL ?
 			vap->iv_appie_proberesp->ie_len : 0)
 	);
@@ -2310,9 +2123,11 @@ ieee80211_alloc_proberesp(struct ieee80211_node *bss, int legacy)
 		frm = ieee80211_add_htcap_vendor(frm, bss);
 		frm = ieee80211_add_htinfo_vendor(frm, bss);
 	}
+#ifdef IEEE80211_SUPPORT_SUPERG
 	if (bss->ni_ies.ath_ie != NULL && legacy != IEEE80211_SEND_LEGACY_11B)
 		frm = ieee80211_add_ath(frm, bss->ni_ath_flags,
 			bss->ni_ath_defkeyix);
+#endif
 	if (vap->iv_appie_proberesp != NULL)
 		frm = add_appie(frm, vap->iv_appie_proberesp);
 	m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);