From 87d8a2a4a884900ed0f5bc6669c72cdd074f5231 Mon Sep 17 00:00:00 2001 From: Jiawen Wu Date: Fri, 18 Dec 2020 17:37:00 +0800 Subject: [PATCH] net/txgbe: destroy security session Add support to clear a security session's private data, get the size of a security session, add update the mbuf with provided metadata. Signed-off-by: Jiawen Wu --- drivers/net/txgbe/txgbe_ipsec.c | 167 ++++++++++++++++++++++++++++++++ drivers/net/txgbe/txgbe_ipsec.h | 15 +++ 2 files changed, 182 insertions(+) diff --git a/drivers/net/txgbe/txgbe_ipsec.c b/drivers/net/txgbe/txgbe_ipsec.c index 24dd09191a..ebf23493ec 100644 --- a/drivers/net/txgbe/txgbe_ipsec.c +++ b/drivers/net/txgbe/txgbe_ipsec.c @@ -196,6 +196,106 @@ txgbe_crypto_add_sa(struct txgbe_crypto_session *ic_session) return 0; } +static int +txgbe_crypto_remove_sa(struct rte_eth_dev *dev, + struct txgbe_crypto_session *ic_session) +{ + struct txgbe_hw *hw = TXGBE_DEV_HW(dev); + struct txgbe_ipsec *priv = TXGBE_DEV_IPSEC(dev); + uint32_t reg_val; + int sa_index = -1; + + if (ic_session->op == TXGBE_OP_AUTHENTICATED_DECRYPTION) { + int i, ip_index = -1; + + /* Find a match in the IP table*/ + for (i = 0; i < IPSEC_MAX_RX_IP_COUNT; i++) { + if (CMP_IP(priv->rx_ip_tbl[i].ip, ic_session->dst_ip)) { + ip_index = i; + break; + } + } + + /* Fail if no match*/ + if (ip_index < 0) { + PMD_DRV_LOG(ERR, + "Entry not found in the Rx IP table\n"); + return -1; + } + + /* Find a free entry in the SA table*/ + for (i = 0; i < IPSEC_MAX_SA_COUNT; i++) { + if (priv->rx_sa_tbl[i].spi == + rte_cpu_to_be_32(ic_session->spi)) { + sa_index = i; + break; + } + } + /* Fail if no match*/ + if (sa_index < 0) { + PMD_DRV_LOG(ERR, + "Entry not found in the Rx SA table\n"); + return -1; + } + + /* Disable and clear Rx SPI and key table entryes*/ + reg_val = TXGBE_IPSRXIDX_WRITE | + TXGBE_IPSRXIDX_TB_SPI | (sa_index << 3); + wr32(hw, TXGBE_IPSRXSPI, 0); + wr32(hw, TXGBE_IPSRXADDRIDX, 0); + wr32w(hw, TXGBE_IPSRXIDX, reg_val, TXGBE_IPSRXIDX_WRITE, 1000); + reg_val = TXGBE_IPSRXIDX_WRITE | + TXGBE_IPSRXIDX_TB_KEY | (sa_index << 3); + wr32(hw, TXGBE_IPSRXKEY(0), 0); + wr32(hw, TXGBE_IPSRXKEY(1), 0); + wr32(hw, TXGBE_IPSRXKEY(2), 0); + wr32(hw, TXGBE_IPSRXKEY(3), 0); + wr32(hw, TXGBE_IPSRXSALT, 0); + wr32(hw, TXGBE_IPSRXMODE, 0); + wr32w(hw, TXGBE_IPSRXIDX, reg_val, TXGBE_IPSRXIDX_WRITE, 1000); + priv->rx_sa_tbl[sa_index].used = 0; + + /* If last used then clear the IP table entry*/ + priv->rx_ip_tbl[ip_index].ref_count--; + if (priv->rx_ip_tbl[ip_index].ref_count == 0) { + reg_val = TXGBE_IPSRXIDX_WRITE | TXGBE_IPSRXIDX_TB_IP | + (ip_index << 3); + wr32(hw, TXGBE_IPSRXADDR(0), 0); + wr32(hw, TXGBE_IPSRXADDR(1), 0); + wr32(hw, TXGBE_IPSRXADDR(2), 0); + wr32(hw, TXGBE_IPSRXADDR(3), 0); + } + } else { /* session->dir == RTE_CRYPTO_OUTBOUND */ + int i; + + /* Find a match in the SA table*/ + for (i = 0; i < IPSEC_MAX_SA_COUNT; i++) { + if (priv->tx_sa_tbl[i].spi == + rte_cpu_to_be_32(ic_session->spi)) { + sa_index = i; + break; + } + } + /* Fail if no match entries*/ + if (sa_index < 0) { + PMD_DRV_LOG(ERR, + "Entry not found in the Tx SA table\n"); + return -1; + } + reg_val = TXGBE_IPSRXIDX_WRITE | (sa_index << 3); + wr32(hw, TXGBE_IPSTXKEY(0), 0); + wr32(hw, TXGBE_IPSTXKEY(1), 0); + wr32(hw, TXGBE_IPSTXKEY(2), 0); + wr32(hw, TXGBE_IPSTXKEY(3), 0); + wr32(hw, TXGBE_IPSTXSALT, 0); + wr32w(hw, TXGBE_IPSTXIDX, reg_val, TXGBE_IPSTXIDX_WRITE, 1000); + + priv->tx_sa_tbl[sa_index].used = 0; + } + + return 0; +} + static int txgbe_crypto_create_session(void *device, struct rte_security_session_conf *conf, @@ -259,6 +359,70 @@ txgbe_crypto_create_session(void *device, return 0; } +static unsigned int +txgbe_crypto_session_get_size(__rte_unused void *device) +{ + return sizeof(struct txgbe_crypto_session); +} + +static int +txgbe_crypto_remove_session(void *device, + struct rte_security_session *session) +{ + struct rte_eth_dev *eth_dev = device; + struct txgbe_crypto_session *ic_session = + (struct txgbe_crypto_session *) + get_sec_session_private_data(session); + struct rte_mempool *mempool = rte_mempool_from_obj(ic_session); + + if (eth_dev != ic_session->dev) { + PMD_DRV_LOG(ERR, "Session not bound to this device\n"); + return -ENODEV; + } + + if (txgbe_crypto_remove_sa(eth_dev, ic_session)) { + PMD_DRV_LOG(ERR, "Failed to remove session\n"); + return -EFAULT; + } + + rte_mempool_put(mempool, (void *)ic_session); + + return 0; +} + +static inline uint8_t +txgbe_crypto_compute_pad_len(struct rte_mbuf *m) +{ + if (m->nb_segs == 1) { + /* 16 bytes ICV + 2 bytes ESP trailer + payload padding size + * payload padding size is stored at + */ + uint8_t *esp_pad_len = rte_pktmbuf_mtod_offset(m, uint8_t *, + rte_pktmbuf_pkt_len(m) - + (ESP_TRAILER_SIZE + ESP_ICV_SIZE)); + return *esp_pad_len + ESP_TRAILER_SIZE + ESP_ICV_SIZE; + } + return 0; +} + +static int +txgbe_crypto_update_mb(void *device __rte_unused, + struct rte_security_session *session, + struct rte_mbuf *m, void *params __rte_unused) +{ + struct txgbe_crypto_session *ic_session = + get_sec_session_private_data(session); + if (ic_session->op == TXGBE_OP_AUTHENTICATED_ENCRYPTION) { + union txgbe_crypto_tx_desc_md *mdata = + (union txgbe_crypto_tx_desc_md *) + rte_security_dynfield(m); + mdata->enc = 1; + mdata->sa_idx = ic_session->sa_index; + mdata->pad_len = txgbe_crypto_compute_pad_len(m); + } + return 0; +} + static const struct rte_security_capability * txgbe_crypto_capabilities_get(void *device __rte_unused) { @@ -387,6 +551,9 @@ txgbe_crypto_capabilities_get(void *device __rte_unused) static struct rte_security_ops txgbe_security_ops = { .session_create = txgbe_crypto_create_session, + .session_get_size = txgbe_crypto_session_get_size, + .session_destroy = txgbe_crypto_remove_session, + .set_pkt_metadata = txgbe_crypto_update_mb, .capabilities_get = txgbe_crypto_capabilities_get }; diff --git a/drivers/net/txgbe/txgbe_ipsec.h b/drivers/net/txgbe/txgbe_ipsec.h index 2f0d813bc5..9b88defbf8 100644 --- a/drivers/net/txgbe/txgbe_ipsec.h +++ b/drivers/net/txgbe/txgbe_ipsec.h @@ -17,6 +17,9 @@ #define IPSEC_MAX_RX_IP_COUNT 128 #define IPSEC_MAX_SA_COUNT 1024 +#define ESP_ICV_SIZE 16 +#define ESP_TRAILER_SIZE 2 + enum txgbe_operation { TXGBE_OP_AUTHENTICATED_ENCRYPTION, TXGBE_OP_AUTHENTICATED_DECRYPTION @@ -68,6 +71,18 @@ struct txgbe_crypto_tx_sa_table { uint8_t used; }; +union txgbe_crypto_tx_desc_md { + uint64_t data; + struct { + /**< SA table index */ + uint32_t sa_idx; + /**< ICV and ESP trailer length */ + uint8_t pad_len; + /**< enable encryption */ + uint8_t enc; + }; +}; + struct txgbe_ipsec { struct txgbe_crypto_rx_ip_table rx_ip_tbl[IPSEC_MAX_RX_IP_COUNT]; struct txgbe_crypto_rx_sa_table rx_sa_tbl[IPSEC_MAX_SA_COUNT]; -- 2.20.1