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-rw-r--r--package/mac80211/patches/300-rt2x00_hw_encryption.patch248
1 files changed, 248 insertions, 0 deletions
diff --git a/package/mac80211/patches/300-rt2x00_hw_encryption.patch b/package/mac80211/patches/300-rt2x00_hw_encryption.patch
new file mode 100644
index 0000000000..51cb3264ac
--- /dev/null
+++ b/package/mac80211/patches/300-rt2x00_hw_encryption.patch
@@ -0,0 +1,248 @@
+From: Ivo van Doorn <IvDoorn@gmail.com>
+Date: Thu, 20 Nov 2008 22:29:36 +0000 (+0100)
+Subject: rt2x00: Implement HW encryption (rt2500usb)
+X-Git-Url: http://git.kernel.org/?p=linux%2Fkernel%2Fgit%2Fivd%2Frt2x00.git;a=commitdiff_plain;h=52fe465ab5eb6aeead5ac8d91dd70e363d0560b7
+
+rt2x00: Implement HW encryption (rt2500usb)
+
+rt2500usb supports hardware encryption.
+rt2500usb supports up to 4 shared and pairwise keys.
+
+Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
+---
+
+diff --git a/drivers/net/wireless/rt2x00/rt2500usb.c b/drivers/net/wireless/rt2x00/rt2500usb.c
+index 10cb46a..620ac65 100644
+--- a/drivers/net/wireless/rt2x00/rt2500usb.c
++++ b/drivers/net/wireless/rt2x00/rt2500usb.c
+@@ -36,6 +36,13 @@
+ #include "rt2500usb.h"
+
+ /*
++ * Allow hardware encryption to be disabled.
++ */
++static int modparam_nohwcrypt = 0;
++module_param_named(nohwcrypt, modparam_nohwcrypt, bool, S_IRUGO);
++MODULE_PARM_DESC(nohwcrypt, "Disable hardware encryption.");
++
++/*
+ * Register access.
+ * All access to the CSR registers will go through the methods
+ * rt2500usb_register_read and rt2500usb_register_write.
+@@ -323,6 +330,85 @@ static void rt2500usb_init_led(struct rt2x00_dev *rt2x00dev,
+ /*
+ * Configuration handlers.
+ */
++
++/*
++ * rt2500usb does not differentiate between shared and pairwise
++ * keys, so we should use the same function for both key types.
++ */
++static int rt2500usb_config_key(struct rt2x00_dev *rt2x00dev,
++ struct rt2x00lib_crypto *crypto,
++ struct ieee80211_key_conf *key)
++{
++ int timeout;
++ u32 mask;
++ u16 reg;
++
++ /* Support up to 4 keys */
++ if (key->hw_key_idx >= 4)
++ return -ENOSPC;
++
++ if (crypto->cmd == SET_KEY) {
++ /*
++ * Pairwise key will always be entry 0, but this
++ * could collide with a shared key on the same
++ * position...
++ */
++ mask = TXRX_CSR0_KEY_ID.bit_mask;
++
++ rt2500usb_register_read(rt2x00dev, TXRX_CSR0, &reg);
++
++ if ((reg & mask) && (reg & mask) == mask)
++ return -ENOSPC;
++
++ reg = rt2x00_get_field16(reg, TXRX_CSR0_KEY_ID);
++
++ key->hw_key_idx += reg ? ffz(reg) : 0;
++
++ /*
++ * The encryption key doesn't fit within the CSR cache,
++ * this means we should allocate it seperately and use
++ * rt2x00usb_vendor_request() to send the key to the hardware.
++ */
++ reg = KEY_ENTRY(key->hw_key_idx);
++ timeout = REGISTER_TIMEOUT32(sizeof(crypto->key));
++ rt2x00usb_vendor_request_large_buff(rt2x00dev, USB_MULTI_WRITE,
++ USB_VENDOR_REQUEST_OUT, reg,
++ crypto->key,
++ sizeof(crypto->key),
++ timeout);
++
++ /*
++ * The driver does not support the IV/EIV generation
++ * in hardware. However it doesn't support the IV/EIV
++ * inside the ieee80211 frame either, but requires it
++ * to be provided seperately for the descriptor.
++ * rt2x00lib will cut the IV/EIV data out of all frames
++ * given to us by mac80211, but we must tell mac80211
++ * to generate the IV/EIV data.
++ */
++ key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
++ key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
++ }
++
++ /*
++ * TXRX_CSR0_KEY_ID contains only single-bit fields to indicate
++ * a particular key is valid.
++ */
++ rt2500usb_register_read(rt2x00dev, TXRX_CSR0, &reg);
++ rt2x00_set_field16(&reg, TXRX_CSR0_ALGORITHM, crypto->cipher);
++ rt2x00_set_field16(&reg, TXRX_CSR0_IV_OFFSET, IEEE80211_HEADER);
++
++ mask = rt2x00_get_field16(reg, TXRX_CSR0_KEY_ID);
++ if (crypto->cmd == SET_KEY)
++ mask |= 1 << key->hw_key_idx;
++ else if (crypto->cmd == DISABLE_KEY)
++ mask &= ~(1 << key->hw_key_idx);
++ rt2x00_set_field16(&reg, TXRX_CSR0_KEY_ID, mask);
++ rt2500usb_register_write(rt2x00dev, TXRX_CSR0, reg);
++
++ return 0;
++}
++
+ static void rt2500usb_config_filter(struct rt2x00_dev *rt2x00dev,
+ const unsigned int filter_flags)
+ {
+@@ -844,7 +930,7 @@ static int rt2500usb_init_registers(struct rt2x00_dev *rt2x00dev)
+
+ rt2500usb_register_read(rt2x00dev, TXRX_CSR0, &reg);
+ rt2x00_set_field16(&reg, TXRX_CSR0_IV_OFFSET, IEEE80211_HEADER);
+- rt2x00_set_field16(&reg, TXRX_CSR0_KEY_ID, 0xff);
++ rt2x00_set_field16(&reg, TXRX_CSR0_KEY_ID, 0);
+ rt2500usb_register_write(rt2x00dev, TXRX_CSR0, reg);
+
+ rt2500usb_register_read(rt2x00dev, MAC_CSR18, &reg);
+@@ -1066,7 +1152,7 @@ static void rt2500usb_write_tx_desc(struct rt2x00_dev *rt2x00dev,
+ * Start writing the descriptor words.
+ */
+ rt2x00_desc_read(txd, 1, &word);
+- rt2x00_set_field32(&word, TXD_W1_IV_OFFSET, IEEE80211_HEADER);
++ rt2x00_set_field32(&word, TXD_W1_IV_OFFSET, txdesc->iv_offset);
+ rt2x00_set_field32(&word, TXD_W1_AIFS, txdesc->aifs);
+ rt2x00_set_field32(&word, TXD_W1_CWMIN, txdesc->cw_min);
+ rt2x00_set_field32(&word, TXD_W1_CWMAX, txdesc->cw_max);
+@@ -1079,6 +1165,11 @@ static void rt2500usb_write_tx_desc(struct rt2x00_dev *rt2x00dev,
+ rt2x00_set_field32(&word, TXD_W2_PLCP_LENGTH_HIGH, txdesc->length_high);
+ rt2x00_desc_write(txd, 2, word);
+
++ if (test_bit(ENTRY_TXD_ENCRYPT, &txdesc->flags)) {
++ _rt2x00_desc_write(txd, 3, skbdesc->iv);
++ _rt2x00_desc_write(txd, 4, skbdesc->eiv);
++ }
++
+ rt2x00_desc_read(txd, 0, &word);
+ rt2x00_set_field32(&word, TXD_W0_RETRY_LIMIT, txdesc->retry_limit);
+ rt2x00_set_field32(&word, TXD_W0_MORE_FRAG,
+@@ -1093,7 +1184,8 @@ static void rt2500usb_write_tx_desc(struct rt2x00_dev *rt2x00dev,
+ test_bit(ENTRY_TXD_FIRST_FRAGMENT, &txdesc->flags));
+ rt2x00_set_field32(&word, TXD_W0_IFS, txdesc->ifs);
+ rt2x00_set_field32(&word, TXD_W0_DATABYTE_COUNT, skb->len);
+- rt2x00_set_field32(&word, TXD_W0_CIPHER, CIPHER_NONE);
++ rt2x00_set_field32(&word, TXD_W0_CIPHER, txdesc->cipher);
++ rt2x00_set_field32(&word, TXD_W0_KEY_ID, txdesc->key_idx);
+ rt2x00_desc_write(txd, 0, word);
+ }
+
+@@ -1204,6 +1296,7 @@ static void rt2500usb_kick_tx_queue(struct rt2x00_dev *rt2x00dev,
+ static void rt2500usb_fill_rxdone(struct queue_entry *entry,
+ struct rxdone_entry_desc *rxdesc)
+ {
++ struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
+ struct queue_entry_priv_usb *entry_priv = entry->priv_data;
+ struct skb_frame_desc *skbdesc = get_skb_frame_desc(entry->skb);
+ __le32 *rxd =
+@@ -1231,6 +1324,31 @@ static void rt2500usb_fill_rxdone(struct queue_entry *entry,
+ if (rt2x00_get_field32(word0, RXD_W0_PHYSICAL_ERROR))
+ rxdesc->flags |= RX_FLAG_FAILED_PLCP_CRC;
+
++ if (test_bit(CONFIG_SUPPORT_HW_CRYPTO, &rt2x00dev->flags)) {
++ rxdesc->cipher = rt2x00_get_field32(word0, RXD_W0_CIPHER);
++ if (rt2x00_get_field32(word0, RXD_W0_CIPHER_ERROR))
++ rxdesc->cipher_status = RX_CRYPTO_FAIL_KEY;
++ }
++
++ if (rxdesc->cipher != CIPHER_NONE) {
++ _rt2x00_desc_read(rxd, 2, &rxdesc->iv);
++ _rt2x00_desc_read(rxd, 3, &rxdesc->eiv);
++ /* ICV is located at the end of frame */
++
++ /*
++ * Hardware has stripped IV/EIV data from 802.11 frame during
++ * decryption. It has provided the data seperately but rt2x00lib
++ * should decide if it should be reinserted.
++ */
++ rxdesc->flags |= RX_FLAG_IV_STRIPPED;
++ if (rxdesc->cipher != CIPHER_TKIP)
++ rxdesc->flags |= RX_FLAG_MMIC_STRIPPED;
++ if (rxdesc->cipher_status == RX_CRYPTO_SUCCESS)
++ rxdesc->flags |= RX_FLAG_DECRYPTED;
++ else if (rxdesc->cipher_status == RX_CRYPTO_FAIL_MIC)
++ rxdesc->flags |= RX_FLAG_MMIC_ERROR;
++ }
++
+ /*
+ * Obtain the status about this packet.
+ * When frame was received with an OFDM bitrate,
+@@ -1238,8 +1356,8 @@ static void rt2500usb_fill_rxdone(struct queue_entry *entry,
+ * a CCK bitrate the signal is the rate in 100kbit/s.
+ */
+ rxdesc->signal = rt2x00_get_field32(word1, RXD_W1_SIGNAL);
+- rxdesc->rssi = rt2x00_get_field32(word1, RXD_W1_RSSI) -
+- entry->queue->rt2x00dev->rssi_offset;
++ rxdesc->rssi =
++ rt2x00_get_field32(word1, RXD_W1_RSSI) - rt2x00dev->rssi_offset;
+ rxdesc->size = rt2x00_get_field32(word0, RXD_W0_DATABYTE_COUNT);
+
+ if (rt2x00_get_field32(word0, RXD_W0_OFDM))
+@@ -1729,6 +1847,8 @@ static int rt2500usb_probe_hw(struct rt2x00_dev *rt2x00dev)
+ __set_bit(DRIVER_REQUIRE_ATIM_QUEUE, &rt2x00dev->flags);
+ __set_bit(DRIVER_REQUIRE_BEACON_GUARD, &rt2x00dev->flags);
+ __set_bit(DRIVER_REQUIRE_SCHEDULED, &rt2x00dev->flags);
++ if (!modparam_nohwcrypt)
++ __set_bit(CONFIG_SUPPORT_HW_CRYPTO, &rt2x00dev->flags);
+ __set_bit(CONFIG_DISABLE_LINK_TUNING, &rt2x00dev->flags);
+
+ /*
+@@ -1748,6 +1868,7 @@ static const struct ieee80211_ops rt2500usb_mac80211_ops = {
+ .config = rt2x00mac_config,
+ .config_interface = rt2x00mac_config_interface,
+ .configure_filter = rt2x00mac_configure_filter,
++ .set_key = rt2x00mac_set_key,
+ .get_stats = rt2x00mac_get_stats,
+ .bss_info_changed = rt2x00mac_bss_info_changed,
+ .conf_tx = rt2x00mac_conf_tx,
+@@ -1769,6 +1890,8 @@ static const struct rt2x00lib_ops rt2500usb_rt2x00_ops = {
+ .get_tx_data_len = rt2500usb_get_tx_data_len,
+ .kick_tx_queue = rt2500usb_kick_tx_queue,
+ .fill_rxdone = rt2500usb_fill_rxdone,
++ .config_shared_key = rt2500usb_config_key,
++ .config_pairwise_key = rt2500usb_config_key,
+ .config_filter = rt2500usb_config_filter,
+ .config_intf = rt2500usb_config_intf,
+ .config_erp = rt2500usb_config_erp,
+diff --git a/drivers/net/wireless/rt2x00/rt2500usb.h b/drivers/net/wireless/rt2x00/rt2500usb.h
+index dbb5d68..4347dfd 100644
+--- a/drivers/net/wireless/rt2x00/rt2500usb.h
++++ b/drivers/net/wireless/rt2x00/rt2500usb.h
+@@ -447,6 +447,9 @@
+ #define SEC_CSR30 0x04bc
+ #define SEC_CSR31 0x04be
+
++#define KEY_ENTRY(__idx) \
++ ( SEC_CSR0 + ((__idx) * 16) )
++
+ /*
+ * PHY control registers.
+ */