Merge commit 'linus/master' into merge-linus

Conflicts:

	arch/x86/kvm/i8254.c

1 files changed, 215 insertions, 0 deletions

diff --git a/drivers/net/wireless/rt2x00/rt2x00crypto.c b/drivers/net/wireless/rt2x00/rt2x00crypto.c
new file mode 100644
index 00000000000..5a858e5106c
--- /dev/null
+++ b/drivers/net/wireless/rt2x00/rt2x00crypto.c
@@ -0,0 +1,215 @@
+/*
+	Copyright (C) 2004 - 2008 rt2x00 SourceForge Project
+	<http://rt2x00.serialmonkey.com>
+
+	This program is free software; you can redistribute it and/or modify
+	it under the terms of the GNU General Public License as published by
+	the Free Software Foundation; either version 2 of the License, or
+	(at your option) any later version.
+
+	This program is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+	GNU General Public License for more details.
+
+	You should have received a copy of the GNU General Public License
+	along with this program; if not, write to the
+	Free Software Foundation, Inc.,
+	59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+/*
+	Module: rt2x00lib
+	Abstract: rt2x00 crypto specific routines.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+
+#include "rt2x00.h"
+#include "rt2x00lib.h"
+
+enum cipher rt2x00crypto_key_to_cipher(struct ieee80211_key_conf *key)
+{
+	switch (key->alg) {
+	case ALG_WEP:
+		if (key->keylen == LEN_WEP40)
+			return CIPHER_WEP64;
+		else
+			return CIPHER_WEP128;
+	case ALG_TKIP:
+		return CIPHER_TKIP;
+	case ALG_CCMP:
+		return CIPHER_AES;
+	default:
+		return CIPHER_NONE;
+	}
+}
+
+unsigned int rt2x00crypto_tx_overhead(struct ieee80211_tx_info *tx_info)
+{
+	struct ieee80211_key_conf *key = tx_info->control.hw_key;
+	unsigned int overhead = 0;
+
+	/*
+	 * Extend frame length to include IV/EIV/ICV/MMIC,
+	 * note that these lengths should only be added when
+	 * mac80211 does not generate it.
+	 */
+	overhead += key->icv_len;
+
+	if (!(key->flags & IEEE80211_KEY_FLAG_GENERATE_IV))
+		overhead += key->iv_len;
+
+	if (!(key->flags & IEEE80211_KEY_FLAG_GENERATE_MMIC)) {
+		if (key->alg == ALG_TKIP)
+			overhead += 8;
+	}
+
+	return overhead;
+}
+
+void rt2x00crypto_tx_remove_iv(struct sk_buff *skb, unsigned int iv_len)
+{
+	struct skb_frame_desc *skbdesc = get_skb_frame_desc(skb);
+	unsigned int header_length = ieee80211_get_hdrlen_from_skb(skb);
+
+	if (unlikely(!iv_len))
+		return;
+
+	/* Copy IV/EIV data */
+	if (iv_len >= 4)
+		memcpy(&skbdesc->iv, skb->data + header_length, 4);
+	if (iv_len >= 8)
+		memcpy(&skbdesc->eiv, skb->data + header_length + 4, 4);
+
+	/* Move ieee80211 header */
+	memmove(skb->data + iv_len, skb->data, header_length);
+
+	/* Pull buffer to correct size */
+	skb_pull(skb, iv_len);
+
+	/* IV/EIV data has officially be stripped */
+	skbdesc->flags |= FRAME_DESC_IV_STRIPPED;
+}
+
+void rt2x00crypto_tx_insert_iv(struct sk_buff *skb)
+{
+	struct skb_frame_desc *skbdesc = get_skb_frame_desc(skb);
+	unsigned int header_length = ieee80211_get_hdrlen_from_skb(skb);
+	const unsigned int iv_len =
+	    ((!!(skbdesc->iv)) * 4) + ((!!(skbdesc->eiv)) * 4);
+
+	if (!(skbdesc->flags & FRAME_DESC_IV_STRIPPED))
+		return;
+
+	skb_push(skb, iv_len);
+
+	/* Move ieee80211 header */
+	memmove(skb->data, skb->data + iv_len, header_length);
+
+	/* Copy IV/EIV data */
+	if (iv_len >= 4)
+		memcpy(skb->data + header_length, &skbdesc->iv, 4);
+	if (iv_len >= 8)
+		memcpy(skb->data + header_length + 4, &skbdesc->eiv, 4);
+
+	/* IV/EIV data has returned into the frame */
+	skbdesc->flags &= ~FRAME_DESC_IV_STRIPPED;
+}
+
+void rt2x00crypto_rx_insert_iv(struct sk_buff *skb, unsigned int align,
+			       unsigned int header_length,
+			       struct rxdone_entry_desc *rxdesc)
+{
+	unsigned int payload_len = rxdesc->size - header_length;
+	unsigned int iv_len;
+	unsigned int icv_len;
+	unsigned int transfer = 0;
+
+	/*
+	 * WEP64/WEP128: Provides IV & ICV
+	 * TKIP: Provides IV/EIV & ICV
+	 * AES: Provies IV/EIV & ICV
+	 */
+	switch (rxdesc->cipher) {
+	case CIPHER_WEP64:
+	case CIPHER_WEP128:
+		iv_len = 4;
+		icv_len = 4;
+		break;
+	case CIPHER_TKIP:
+		iv_len = 8;
+		icv_len = 4;
+		break;
+	case CIPHER_AES:
+		iv_len = 8;
+		icv_len = 8;
+		break;
+	default:
+		/* Unsupport type */
+		return;
+	}
+
+	/*
+	 * Make room for new data, note that we increase both
+	 * headsize and tailsize when required. The tailsize is
+	 * only needed when ICV data needs to be inserted and
+	 * the padding is smaller then the ICV data.
+	 * When alignment requirements is greater then the
+	 * ICV data we must trim the skb to the correct size
+	 * because we need to remove the extra bytes.
+	 */
+	skb_push(skb, iv_len + align);
+	if (align < icv_len)
+		skb_put(skb, icv_len - align);
+	else if (align > icv_len)
+		skb_trim(skb, rxdesc->size + iv_len + icv_len);
+
+	/* Move ieee80211 header */
+	memmove(skb->data + transfer,
+		skb->data + transfer + iv_len + align,
+		header_length);
+	transfer += header_length;
+
+	/* Copy IV data */
+	if (iv_len >= 4) {
+		memcpy(skb->data + transfer, &rxdesc->iv, 4);
+		transfer += 4;
+	}
+
+	/* Copy EIV data */
+	if (iv_len >= 8) {
+		memcpy(skb->data + transfer, &rxdesc->eiv, 4);
+		transfer += 4;
+	}
+
+	/* Move payload */
+	if (align) {
+		memmove(skb->data + transfer,
+			skb->data + transfer + align,
+			payload_len);
+	}
+
+	/*
+	 * NOTE: Always count the payload as transfered,
+	 * even when alignment was set to zero. This is required
+	 * for determining the correct offset for the ICV data.
+	 */
+	transfer += payload_len;
+
+	/* Copy ICV data */
+	if (icv_len >= 4) {
+		memcpy(skb->data + transfer, &rxdesc->icv, 4);
+		/*
+		 * AES appends 8 bytes, we can't fill the upper
+		 * 4 bytes, but mac80211 doesn't care about what
+		 * we provide here anyway and strips it immediately.
+		 */
+		transfer += icv_len;
+	}
+
+	/* IV/EIV/ICV has been inserted into frame */
+	rxdesc->size = transfer;
+	rxdesc->flags &= ~RX_FLAG_IV_STRIPPED;
+}