This patch allows p54 to utilize its WEP and CCMP accelerator.
However, I'm not sure how TKIP is supposed to work... Kalle?
Signed-off-by: Christian Lamparter <chunkeey@xxxxxx>
---
diff -Nurp a/drivers/net/wireless/p54/p54common.c b/drivers/net/wireless/p54/p54common.c
--- a/drivers/net/wireless/p54/p54common.c 2008-11-14 18:37:34.000000000 +0100
+++ b/drivers/net/wireless/p54/p54common.c 2008-11-14 18:55:53.000000000 +0100
@@ -26,6 +26,9 @@
#include "p54.h"
#include "p54common.h"
+static int modparam_nohwcrypt;
+module_param_named(nohwcrypt, modparam_nohwcrypt, bool, S_IRUGO);
+MODULE_PARM_DESC(nohwcrypt, "Disable hardware encryption.");
MODULE_AUTHOR("Michael Wu <flamingice@xxxxxxxxxxxx>");
MODULE_DESCRIPTION("Softmac Prism54 common code");
MODULE_LICENSE("GPL");
@@ -196,6 +199,8 @@ int p54_parse_firmware(struct ieee80211_
priv->rx_end = le32_to_cpu(desc->rx_end) - 0x3500;
priv->headroom = desc->headroom;
priv->tailroom = desc->tailroom;
+ priv->privacy_caps = desc->privacy_caps;
+ priv->rx_keycache_size = desc->rx_keycache_size;
if (le32_to_cpu(bootrec->len) == 11)
priv->rx_mtu = le16_to_cpu(desc->rx_mtu);
else
@@ -238,6 +243,15 @@ int p54_parse_firmware(struct ieee80211_
priv->tx_stats[7].limit = 2; /* AC_BK */
dev->queues = 4;
}
+
+ if (!modparam_nohwcrypt)
+ printk(KERN_INFO "%s: Available cryptographic accelerator for"
+ " WEP:%s, TKIP:no, CCMP:%s\n",
+ wiphy_name(dev->wiphy),
+ (priv->privacy_caps & BR_DESC_PRIV_CAP_WEP) ? "YES" :
+ "no", (priv->privacy_caps & BR_DESC_PRIV_CAP_AESCCMP) ?
+ "YES" : "no");
+
priv->fw_crc = crc;
return 0;
@@ -539,6 +553,11 @@ static int p54_rx_data(struct ieee80211_
return 0;
}
+ if (hdr->decrypt_status == P54_DECRYPT_OK)
+ rx_status.flag |= RX_FLAG_DECRYPTED;
+ if (hdr->decrypt_status == P54_DECRYPT_FAIL_MICHAEL)
+ rx_status.flag |= RX_FLAG_MMIC_ERROR;
+
rx_status.signal = p54_rssi_to_dbm(dev, hdr->rssi);
rx_status.noise = priv->noise;
/* XX correct? */
@@ -1087,6 +1106,20 @@ static int p54_tx_fill(struct ieee80211_
return ret;
}
+static u8 p54_convert_algo(enum ieee80211_key_alg alg)
+{
+ switch (alg) {
+ case ALG_WEP:
+ return P54_CRYPTO_WEP;
+ case ALG_TKIP:
+ return P54_CRYPTO_TKIPMICHAEL;
+ case ALG_CCMP:
+ return P54_CRYPTO_AESCCMP;
+ default:
+ return 0;
+ }
+}
+
static int p54_tx(struct ieee80211_hw *dev, struct sk_buff *skb)
{
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
@@ -1097,13 +1130,14 @@ static int p54_tx(struct ieee80211_hw *d
size_t padding, len, tim_len = 0;
int i, j, ridx;
u16 hdr_flags = 0, aid = 0;
- u8 rate, queue;
+ u8 rate, queue, crypt_offset;
u8 cts_rate = 0x20;
u8 rc_flags;
u8 calculated_tries[4];
u8 nrates = 0, nremaining = 8;
queue = skb_get_queue_mapping(skb);
+ crypt_offset = ieee80211_get_hdrlen_from_skb(skb);
if (p54_tx_fill(dev, skb, info, &queue, &tim_len, &hdr_flags, &aid)) {
current_queue = &priv->tx_stats[queue];
@@ -1209,10 +1243,23 @@ static int p54_tx(struct ieee80211_hw *d
/* TODO: enable bursting */
hdr->flags = cpu_to_le16(hdr_flags);
hdr->tries = ridx;
- txhdr->crypt_offset = 0;
txhdr->rts_rate_idx = 0;
- txhdr->key_type = 0;
- txhdr->key_len = 0;
+ if (info->control.hw_key) {
+ crypt_offset += info->control.hw_key->iv_len;
+ if (info->control.hw_key->flags & IEEE80211_KEY_FLAG_WMM_STA)
+ crypt_offset += IEEE80211_QOS_CTL_LEN;
+ txhdr->crypt_offset = crypt_offset;
+ txhdr->key_type = p54_convert_algo(info->control.hw_key->alg);
+ txhdr->key_len = min((u8)16, info->control.hw_key->keylen);
+ memcpy(txhdr->key, info->control.hw_key->key, txhdr->key_len);
+
+ /* reserve some space for ICV */
+ hdr->len += info->control.hw_key->icv_len;
+ } else {
+ txhdr->crypt_offset = 0;
+ txhdr->key_type = 0;
+ txhdr->key_len = 0;
+ }
txhdr->hw_queue = queue;
if (current_queue)
txhdr->backlog = current_queue->len;
@@ -1841,6 +1888,66 @@ static void p54_bss_info_changed(struct
}
+static int p54_set_key(struct ieee80211_hw *dev, enum set_key_cmd cmd,
+ const u8 *local_address, const u8 *address,
+ struct ieee80211_key_conf *key)
+{
+ struct p54_common *priv = dev->priv;
+ struct sk_buff *skb;
+ struct p54_keycache *rxkey;
+ u8 algo = 0;
+
+ if (modparam_nohwcrypt)
+ return -ENOSPC;
+
+ if (cmd == DISABLE_KEY)
+ algo = 0;
+ else {
+ switch (key->alg) {
+ case ALG_TKIP:
+ return -EOPNOTSUPP;
+ break;
+ case ALG_WEP:
+ if (!(priv->privacy_caps & BR_DESC_PRIV_CAP_WEP))
+ return -EOPNOTSUPP;
+ key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
+ algo = P54_CRYPTO_WEP;
+ break;
+ case ALG_CCMP:
+ if (!(priv->privacy_caps & BR_DESC_PRIV_CAP_AESCCMP))
+ return -EOPNOTSUPP;
+ key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
+ algo = P54_CRYPTO_AESCCMP;
+ break;
+ default:
+ return -EINVAL;
+ }
+ }
+
+ mutex_lock(&priv->conf_mutex);
+ skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL_OPSET, sizeof(*rxkey) +
+ sizeof(struct p54_hdr), P54_CONTROL_TYPE_RX_KEYCACHE,
+ GFP_ATOMIC);
+ if (!skb) {
+ mutex_unlock(&priv->conf_mutex);
+ return -ENOMEM;
+ }
+
+ rxkey = (struct p54_keycache *)skb_put(skb, sizeof(*rxkey));
+ rxkey->entry = cpu_to_le16(key->keyidx);
+ rxkey->key_id = cpu_to_le16(key->keyidx);
+ rxkey->key_len = min((u8)16, key->keylen);
+ rxkey->key_type = algo;
+ if (address)
+ memcpy(rxkey->mac, address, ETH_ALEN);
+ else
+ memset(rxkey->mac, ~0, ETH_ALEN);
+ memcpy(rxkey->key, key->key, rxkey->key_len);
+ priv->tx(dev, skb, 1);
+ mutex_unlock(&priv->conf_mutex);
+ return 0;
+}
+
static const struct ieee80211_ops p54_ops = {
.tx = p54_tx,
.start = p54_start,
@@ -1848,6 +1955,7 @@ static const struct ieee80211_ops p54_op
.add_interface = p54_add_interface,
.remove_interface = p54_remove_interface,
.set_tim = p54_set_tim,
+ .set_key = p54_set_key,
.config = p54_config,
.config_interface = p54_config_interface,
.bss_info_changed = p54_bss_info_changed,
diff -Nurp a/drivers/net/wireless/p54/p54.h b/drivers/net/wireless/p54/p54.h
--- a/drivers/net/wireless/p54/p54.h 2008-11-14 17:19:36.000000000 +0100
+++ b/drivers/net/wireless/p54/p54.h 2008-11-14 18:54:15.000000000 +0100
@@ -116,6 +116,8 @@ struct p54_common {
int noise;
void *eeprom;
struct completion eeprom_comp;
+ u8 privacy_caps;
+ u8 rx_keycache_size;
};
int p54_rx(struct ieee80211_hw *dev, struct sk_buff *skb);
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