diff options
Diffstat (limited to 'package/mac80211/patches/300-rt2x00_hw_encryption.patch')
| -rw-r--r-- | package/mac80211/patches/300-rt2x00_hw_encryption.patch | 248 |
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 000000000..51cb3264a --- /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, ®); ++ ++ 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, ®); ++ rt2x00_set_field16(®, TXRX_CSR0_ALGORITHM, crypto->cipher); ++ rt2x00_set_field16(®, 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(®, 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, ®); + rt2x00_set_field16(®, TXRX_CSR0_IV_OFFSET, IEEE80211_HEADER); +- rt2x00_set_field16(®, TXRX_CSR0_KEY_ID, 0xff); ++ rt2x00_set_field16(®, TXRX_CSR0_KEY_ID, 0); + rt2500usb_register_write(rt2x00dev, TXRX_CSR0, reg); + + rt2500usb_register_read(rt2x00dev, MAC_CSR18, ®); +@@ -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. + */ |