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Tue, 27 Sep 2022 10:27:33 +0000 From: Simon Horman To: David Miller , Jakub Kicinski , Paolo Abeni Cc: netdev@vger.kernel.org, oss-drivers@corigine.com, Leon Romanovsky , Huanhuan Wang Subject: [PATCH net-next v2 3/3] nfp: implement xfrm callbacks and expose ipsec offload feature to upper layer Date: Tue, 27 Sep 2022 12:27:07 +0200 Message-Id: <20220927102707.479199-4-simon.horman@corigine.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20220927102707.479199-1-simon.horman@corigine.com> References: <20220927102707.479199-1-simon.horman@corigine.com> X-ClientProxiedBy: AS4P192CA0017.EURP192.PROD.OUTLOOK.COM (2603:10a6:20b:5e1::12) To PH0PR13MB4842.namprd13.prod.outlook.com (2603:10b6:510:78::6) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: PH0PR13MB4842:EE_|MN2PR13MB4150:EE_ X-MS-Office365-Filtering-Correlation-Id: 6c75a404-33eb-49c6-a72a-08daa072e372 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:PH0PR13MB4842.namprd13.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230022)(4636009)(346002)(376002)(136003)(396003)(366004)(39840400004)(451199015)(186003)(2906002)(36756003)(41300700001)(30864003)(6666004)(44832011)(5660300002)(1076003)(6512007)(107886003)(8936002)(2616005)(6506007)(52116002)(38100700002)(83380400001)(86362001)(54906003)(6486002)(110136005)(478600001)(316002)(4326008)(8676002)(66556008)(66946007)(66476007);DIR:OUT;SFP:1102; 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It supports 16K SA info in total. Expose ipsec offload feature to upper layer, this feature will signal the availability of the offload. Based on initial work of Norm Bagley . Signed-off-by: Huanhuan Wang Signed-off-by: Simon Horman --- .../net/ethernet/netronome/nfp/crypto/ipsec.c | 562 +++++++++++++++++- .../ethernet/netronome/nfp/nfp_net_common.c | 6 + .../net/ethernet/netronome/nfp/nfp_net_ctrl.h | 4 +- 3 files changed, 568 insertions(+), 4 deletions(-) diff --git a/drivers/net/ethernet/netronome/nfp/crypto/ipsec.c b/drivers/net/ethernet/netronome/nfp/crypto/ipsec.c index 658fcba8e733..a81e6cde4ea8 100644 --- a/drivers/net/ethernet/netronome/nfp/crypto/ipsec.c +++ b/drivers/net/ethernet/netronome/nfp/crypto/ipsec.c @@ -17,6 +17,77 @@ #define NFP_NET_IPSEC_MAX_SA_CNT (16 * 1024) /* Firmware support a maximum of 16K sa offload */ #define OFFLOAD_HANDLE_ERROR 0xffffffff +/* IPsec config message cmd codes */ +enum nfp_ipsec_cfg_mssg_cmd_codes { + NFP_IPSEC_CFG_MSSG_ADD_SA, /* Add a new SA */ + NFP_IPSEC_CFG_MSSG_INV_SA, /* Invalidate an existing SA */ + NFP_IPSEC_CFG_MSSG_MODIFY_SA, /* Modify an existing SA */ + NFP_IPSEC_CFG_MSSG_GET_SA_STATS, /* Report SA counters, flags, etc. */ + NFP_IPSEC_CFG_MSSG_GET_SEQ_NUMS, /* Allocate sequence numbers */ + NFP_IPSEC_CFG_MSSG_LAST +}; + +/* IPsec config message response codes */ +enum nfp_ipsec_cfg_mssg_rsp_codes { + NFP_IPSEC_CFG_MSSG_OK, + NFP_IPSEC_CFG_MSSG_FAILED, + NFP_IPSEC_CFG_MSSG_SA_VALID, + NFP_IPSEC_CFG_MSSG_SA_HASH_ADD_FAILED, + NFP_IPSEC_CFG_MSSG_SA_HASH_DEL_FAILED, + NFP_IPSEC_CFG_MSSG_SA_INVALID_CMD +}; + +/* Protocol */ +enum nfp_ipsec_sa_prot { + NFP_IPSEC_PROTOCOL_AH = 0, + NFP_IPSEC_PROTOCOL_ESP = 1 +}; + +/* Mode */ +enum nfp_ipsec_sa_mode { + NFP_IPSEC_PROTMODE_TRANSPORT = 0, + NFP_IPSEC_PROTMODE_TUNNEL = 1 +}; + +/* Cipher types */ +enum nfp_ipsec_sa_cipher { + NFP_IPSEC_CIPHER_NULL, + NFP_IPSEC_CIPHER_3DES, + NFP_IPSEC_CIPHER_AES128, + NFP_IPSEC_CIPHER_AES192, + NFP_IPSEC_CIPHER_AES256, + NFP_IPSEC_CIPHER_AES128_NULL, + NFP_IPSEC_CIPHER_AES192_NULL, + NFP_IPSEC_CIPHER_AES256_NULL, + NFP_IPSEC_CIPHER_CHACHA20 +}; + +/* Cipher modes */ +enum nfp_ipsec_sa_cipher_mode { + NFP_IPSEC_CIMODE_ECB, + NFP_IPSEC_CIMODE_CBC, + NFP_IPSEC_CIMODE_CFB, + NFP_IPSEC_CIMODE_OFB, + NFP_IPSEC_CIMODE_CTR +}; + +/* Hash types */ +enum nfp_ipsec_sa_hash_type { + NFP_IPSEC_HASH_NONE, + NFP_IPSEC_HASH_MD5_96, + NFP_IPSEC_HASH_SHA1_96, + NFP_IPSEC_HASH_SHA256_96, + NFP_IPSEC_HASH_SHA384_96, + NFP_IPSEC_HASH_SHA512_96, + NFP_IPSEC_HASH_MD5_128, + NFP_IPSEC_HASH_SHA1_80, + NFP_IPSEC_HASH_SHA256_128, + NFP_IPSEC_HASH_SHA384_192, + NFP_IPSEC_HASH_SHA512_256, + NFP_IPSEC_HASH_GF128_128, + NFP_IPSEC_HASH_POLY1305_128 +}; + /* IPSEC_CFG_MSSG_ADD_SA */ struct nfp_ipsec_cfg_add_sa { u32 ciph_key[8]; /* Cipher Key */ @@ -71,6 +142,73 @@ struct nfp_ipsec_cfg_add_sa { uint32_t tfc_padding :16; /* Traffic Flow Confidential Pad */ }; +/* IPSEC_CFG_MSSG_INV_SA */ +struct nfp_ipsec_cfg_inv_sa { + u32 spare6; +}; + +/* IPSEC_CFG_MSSG_GET_SA_STATS */ +struct nfp_ipsec_cfg_get_sa_stats { + u32 seq_lo; /* Sequence Number (low 32bits) */ + u32 seq_high; /* Sequence Number (high 32bits) */ + u32 arw_counter_lo; /* Anti-replay wndw cntr */ + u32 arw_counter_high; /* Anti-replay wndw cntr */ + u32 arw_bitmap_lo; /* Anti-replay wndw bitmap */ + u32 arw_bitmap_high; /* Anti-replay wndw bitmap */ + uint32_t reserved1:1; + uint32_t soft_lifetime_byte_cnt_exceeded :1; /* Soft cnt_exceeded */ + uint32_t hard_lifetime_byte_cnt_exceeded :1; /* Hard cnt_exceeded */ + uint32_t soft_lifetime_time_limit_exceeded :1; /* Soft cnt_exceeded */ + uint32_t hard_lifetime_time_limit_exceeded :1; /* Hard cnt_exceeded */ + uint32_t spare7:27; + u32 lifetime_byte_count; + u32 pkt_count; + u32 discards_auth; /* Auth failures */ + u32 discards_unsupported; /* Unsupported crypto mode */ + u32 discards_alignment; /* Alignment error */ + u32 discards_hard_bytelimit; /* Byte Count limit */ + u32 discards_seq_num_wrap; /* Sequ Number wrap */ + u32 discards_pmtu_limit_exceeded; /* PMTU Limit */ + u32 discards_arw_old_seq; /* Anti-Replay seq small */ + u32 discards_arw_replay; /* Anti-Replay seq rcvd */ + u32 discards_ctrl_word; /* Bad SA Control word */ + u32 discards_ip_hdr_len; /* Hdr offset from too high */ + u32 discards_eop_buf; /* No EOP buffer */ + u32 ipv4_id_counter; /* IPv4 ID field counter */ + u32 discards_isl_fail; /* Inbound SPD Lookup failure */ + u32 discards_ext_not_found; /* Ext header end */ + u32 discards_max_ext_hdrs; /* Max ext header */ + u32 discards_non_ext_hdrs; /* Non-extension headers */ + u32 discards_ext_hdr_too_big; /* Ext header chain */ + u32 discards_hard_timelimit; /* Time Limit */ +}; + +/* IPSEC_CFG_MSSG_GET_SEQ_NUMS */ +struct ipsec_cfg_get_seq_nums { + u32 seq_nums; /* Sequence numbers to allocate */ + u32 seq_num_low; /* Rtrn start seq num 31:00 */ + u32 seq_num_hi; /* Rtrn start seq num 63:32 */ +}; + +/* IPSEC_CFG_MSSG */ +struct nfp_ipsec_cfg_mssg { + union { + struct{ + uint32_t cmd:16; /* One of nfp_ipsec_cfg_mssg_cmd_codes */ + uint32_t rsp:16; /* One of nfp_ipsec_cfg_mssg_rsp_codes */ + uint32_t sa_idx:16; /* SA table index */ + uint32_t spare0:16; + union { + struct nfp_ipsec_cfg_add_sa cfg_add_sa; + struct nfp_ipsec_cfg_inv_sa cfg_inv_sa; + struct nfp_ipsec_cfg_get_sa_stats cfg_get_stats; + struct ipsec_cfg_get_seq_nums cfg_get_seq_nums; + }; + }; + u32 raw[64]; + }; +}; + struct nfp_net_ipsec_sa_data { struct nfp_ipsec_cfg_add_sa nfp_sa; struct xfrm_state *x; @@ -84,22 +222,442 @@ struct nfp_net_ipsec_data { struct mutex lock; /* Protects nfp_net_ipsec_data struct */ }; +static int nfp_ipsec_cfg_cmd_issue(struct nfp_net *nn, int type, int saidx, + struct nfp_ipsec_cfg_mssg *msg) +{ + int i, msg_size, ret; + + msg->cmd = type; + msg->sa_idx = saidx; + msg->rsp = 0; + msg_size = ARRAY_SIZE(msg->raw); + + for (i = 0; i < msg_size; i++) + nn_writel(nn, NFP_NET_CFG_MBOX_VAL + 4 * i, msg->raw[i]); + + ret = nfp_net_mbox_reconfig(nn, NFP_NET_CFG_MBOX_CMD_IPSEC); + if (ret < 0) + return ret; + + /* For now we always read the whole message response back */ + for (i = 0; i < msg_size; i++) + msg->raw[i] = nn_readl(nn, NFP_NET_CFG_MBOX_VAL + 4 * i); + + switch (msg->rsp) { + case NFP_IPSEC_CFG_MSSG_OK: + return 0; + case NFP_IPSEC_CFG_MSSG_SA_INVALID_CMD: + return -EINVAL; + case NFP_IPSEC_CFG_MSSG_SA_VALID: + return -EEXIST; + case NFP_IPSEC_CFG_MSSG_FAILED: + case NFP_IPSEC_CFG_MSSG_SA_HASH_ADD_FAILED: + case NFP_IPSEC_CFG_MSSG_SA_HASH_DEL_FAILED: + return -EIO; + default: + return -EDOM; + } +} + +static int set_aes_keylen(struct nfp_ipsec_cfg_add_sa *cfg, int alg, int keylen) +{ + if (alg == SADB_X_EALG_NULL_AES_GMAC) { + if (keylen == 128) + cfg->ctrl_word.cipher = NFP_IPSEC_CIPHER_AES128_NULL; + else if (keylen == 192) + cfg->ctrl_word.cipher = NFP_IPSEC_CIPHER_AES192_NULL; + else if (keylen == 256) + cfg->ctrl_word.cipher = NFP_IPSEC_CIPHER_AES256_NULL; + else + return -EINVAL; + } else { + if (keylen == 128) + cfg->ctrl_word.cipher = NFP_IPSEC_CIPHER_AES128; + else if (keylen == 192) + cfg->ctrl_word.cipher = NFP_IPSEC_CIPHER_AES192; + else if (keylen == 256) + cfg->ctrl_word.cipher = NFP_IPSEC_CIPHER_AES256; + else + return -EINVAL; + } + + return 0; +} + static int nfp_net_xfrm_add_state(struct xfrm_state *x) { - return -EOPNOTSUPP; + int i, key_len, trunc_len, err = 0, saidx = -1; + struct net_device *netdev = x->xso.dev; + struct nfp_net_ipsec_sa_data *sa_data; + struct nfp_ipsec_cfg_add_sa *cfg; + struct nfp_net_ipsec_data *ipd; + struct nfp_ipsec_cfg_mssg msg; + struct nfp_net *nn; + __be32 *p; + + nn = netdev_priv(netdev); + ipd = nn->ipsec_data; + cfg = &msg.cfg_add_sa; + + nn_dbg(nn, "XFRM add state!\n"); + mutex_lock(&ipd->lock); + + if (ipd->sa_free_cnt == 0) { + nn_err(nn, "No space for xfrm offload\n"); + err = -ENOSPC; + goto error; + } + + saidx = ipd->sa_free_stack[ipd->sa_free_cnt - 1]; + sa_data = &ipd->sa_entries[saidx]; + memset(&msg, 0, sizeof(msg)); + + /* General */ + switch (x->props.mode) { + case XFRM_MODE_TUNNEL: + cfg->ctrl_word.mode = NFP_IPSEC_PROTMODE_TUNNEL; + break; + case XFRM_MODE_TRANSPORT: + cfg->ctrl_word.mode = NFP_IPSEC_PROTMODE_TRANSPORT; + break; + default: + nn_err(nn, "Unsupported mode for xfrm offload\n"); + err = -EINVAL; + goto error; + } + + switch (x->id.proto) { + case IPPROTO_ESP: + cfg->ctrl_word.proto = NFP_IPSEC_PROTOCOL_ESP; + break; + case IPPROTO_AH: + cfg->ctrl_word.proto = NFP_IPSEC_PROTOCOL_AH; + break; + default: + nn_err(nn, "Unsupported protocol for xfrm offload\n"); + err = -EINVAL; + goto error; + } + + if (x->props.flags & XFRM_STATE_ESN) { + nn_err(nn, "Unsupported XFRM_REPLAY_MODE_ESN for xfrm offload\n"); + err = -EINVAL; + goto error; + } + + cfg->ctrl_word.ena_arw = 0; + cfg->ctrl_word.ext_arw = 0; + cfg->spi = ntohl(x->id.spi); + + /* Hash/Authentication */ + if (x->aalg) + trunc_len = x->aalg->alg_trunc_len; + else + trunc_len = 0; + + switch (x->props.aalgo) { + case SADB_AALG_NONE: + if (x->aead) { + trunc_len = -1; + } else { + nn_err(nn, "Unsupported authentication algorithm\n"); + err = -EINVAL; + goto error; + } + break; + case SADB_X_AALG_NULL: + cfg->ctrl_word.hash = NFP_IPSEC_HASH_NONE; + trunc_len = -1; + break; + case SADB_AALG_MD5HMAC: + if (trunc_len == 96) + cfg->ctrl_word.hash = NFP_IPSEC_HASH_MD5_96; + else if (trunc_len == 128) + cfg->ctrl_word.hash = NFP_IPSEC_HASH_MD5_128; + else + trunc_len = 0; + break; + case SADB_AALG_SHA1HMAC: + if (trunc_len == 96) + cfg->ctrl_word.hash = NFP_IPSEC_HASH_SHA1_96; + else if (trunc_len == 80) + cfg->ctrl_word.hash = NFP_IPSEC_HASH_SHA1_80; + else + trunc_len = 0; + break; + case SADB_X_AALG_SHA2_256HMAC: + if (trunc_len == 96) + cfg->ctrl_word.hash = NFP_IPSEC_HASH_SHA256_96; + else if (trunc_len == 128) + cfg->ctrl_word.hash = NFP_IPSEC_HASH_SHA256_128; + else + trunc_len = 0; + break; + case SADB_X_AALG_SHA2_384HMAC: + if (trunc_len == 96) + cfg->ctrl_word.hash = NFP_IPSEC_HASH_SHA384_96; + else if (trunc_len == 192) + cfg->ctrl_word.hash = NFP_IPSEC_HASH_SHA384_192; + else + trunc_len = 0; + break; + case SADB_X_AALG_SHA2_512HMAC: + if (trunc_len == 96) + cfg->ctrl_word.hash = NFP_IPSEC_HASH_SHA512_96; + else if (trunc_len == 256) + cfg->ctrl_word.hash = NFP_IPSEC_HASH_SHA512_256; + else + trunc_len = 0; + break; + default: + nn_err(nn, "Unsupported authentication algorithm\n"); + err = -EINVAL; + goto error; + } + + if (!trunc_len) { + nn_err(nn, "Unsupported authentication algorithm trunc length\n"); + err = -EINVAL; + goto error; + } + + if (x->aalg) { + p = (__be32 *)x->aalg->alg_key; + key_len = DIV_ROUND_UP(x->aalg->alg_key_len, BITS_PER_BYTE); + if (key_len > sizeof(cfg->auth_key)) { + nn_err(nn, "Insufficient space for offloaded auth key\n"); + err = -EINVAL; + goto error; + } + for (i = 0; i < key_len / sizeof(cfg->auth_key[0]) ; i++) + cfg->auth_key[i] = ntohl(*p++); + } + /* Encryption */ + switch (x->props.ealgo) { + case SADB_EALG_NONE: + case SADB_EALG_NULL: + cfg->ctrl_word.cimode = NFP_IPSEC_CIMODE_CBC; + cfg->ctrl_word.cipher = NFP_IPSEC_CIPHER_NULL; + break; + case SADB_EALG_3DESCBC: + cfg->ctrl_word.cimode = NFP_IPSEC_CIMODE_CBC; + cfg->ctrl_word.cipher = NFP_IPSEC_CIPHER_3DES; + break; + case SADB_X_EALG_AES_GCM_ICV16: + case SADB_X_EALG_NULL_AES_GMAC: + if (!x->aead) { + nn_err(nn, "Invalid AES key data\n"); + err = -EINVAL; + goto error; + } + + if (x->aead->alg_icv_len != 128) { + nn_err(nn, "ICV must be 128bit with SADB_X_EALG_AES_GCM_ICV16\n"); + err = -EINVAL; + goto error; + } + cfg->ctrl_word.cimode = NFP_IPSEC_CIMODE_CTR; + cfg->ctrl_word.hash = NFP_IPSEC_HASH_GF128_128; + + /* Aead->alg_key_len includes 32-bit salt */ + if (set_aes_keylen(cfg, x->props.ealgo, x->aead->alg_key_len - 32)) { + nn_err(nn, "Unsupported AES key length %d\n", x->aead->alg_key_len); + err = -EINVAL; + goto error; + } + break; + case SADB_X_EALG_AESCBC: + cfg->ctrl_word.cimode = NFP_IPSEC_CIMODE_CBC; + if (!x->ealg) { + nn_err(nn, "Invalid AES key data\n"); + err = -EINVAL; + goto error; + } + if (set_aes_keylen(cfg, x->props.ealgo, x->ealg->alg_key_len) < 0) { + nn_err(nn, "Unsupported AES key length %d\n", x->ealg->alg_key_len); + err = -EINVAL; + goto error; + } + break; + default: + nn_err(nn, "Unsupported encryption algorithm for offload\n"); + err = -EINVAL; + goto error; + } + + if (x->aead) { + int salt_len = 4; + + p = (__be32 *)x->aead->alg_key; + key_len = DIV_ROUND_UP(x->aead->alg_key_len, BITS_PER_BYTE); + key_len -= salt_len; + + if (key_len > sizeof(cfg->ciph_key)) { + nn_err(nn, "Insufficient space for offloaded key\n"); + err = -EINVAL; + goto error; + } + + for (i = 0; i < key_len / sizeof(cfg->ciph_key[0]) ; i++) + cfg->ciph_key[i] = ntohl(*p++); + + /* Load up the salt */ + for (i = 0; i < salt_len; i++) + cfg->auth_key[i] = ntohl(*p++); + } + + if (x->ealg) { + p = (__be32 *)x->ealg->alg_key; + key_len = DIV_ROUND_UP(x->ealg->alg_key_len, BITS_PER_BYTE); + + if (key_len > sizeof(cfg->ciph_key)) { + nn_err(nn, "Insufficient space for offloaded key\n"); + err = -EINVAL; + goto error; + } + for (i = 0; i < key_len / sizeof(cfg->ciph_key[0]) ; i++) + cfg->ciph_key[i] = ntohl(*p++); + } + /* IP related info */ + switch (x->props.family) { + case AF_INET: + cfg->ipv6 = 0; + cfg->src_ip[0] = ntohl(x->props.saddr.a4); + cfg->dst_ip[0] = ntohl(x->id.daddr.a4); + break; + case AF_INET6: + cfg->ipv6 = 1; + for (i = 0; i < 4; i++) { + cfg->src_ip[i] = ntohl(x->props.saddr.a6[i]); + cfg->dst_ip[i] = ntohl(x->id.daddr.a6[i]); + } + break; + default: + nn_err(nn, "Unsupported address family\n"); + err = -EINVAL; + goto error; + } + + /* Maximum nic ipsec code could handle. Other limits may apply. */ + cfg->pmtu_limit = 0xffff; + + /* Host will generate the sequence numbers so that if packets get + * fragmented in host, sequence numbers will stay in sync. + */ + cfg->ctrl_word.gen_seq = 0; + + cfg->ctrl_word.encap_dsbl = 1; + + /* Sa direction */ + cfg->ctrl_word.dir = x->xso.dir; + + /* Allocate saidx and commit the Sa */ + ipd->sa_free_cnt -= 1; + sa_data->invalidated = 0; + sa_data->x = x; + x->xso.offload_handle = saidx + 1; + err = nfp_ipsec_cfg_cmd_issue(nn, NFP_IPSEC_CFG_MSSG_ADD_SA, saidx, &msg); + if (err) { + nn_err(nn, "Failed to issue ipsec command err ret=%d\n", err); + goto error; + } + + mutex_unlock(&ipd->lock); + + nn_dbg(nn, "Successfully offload saidx %d\n", saidx); + return 0; +error: + if (saidx < 0) { + ipd->sa_free_stack[ipd->sa_free_cnt] = saidx; + ipd->sa_free_cnt++; + } + mutex_unlock(&ipd->lock); + x->xso.offload_handle = OFFLOAD_HANDLE_ERROR; + return err; +} + +static void xfrm_invalidate(struct nfp_net *nn, unsigned int saidx, int is_del) +{ + struct nfp_net_ipsec_data *ipd = nn->ipsec_data; + struct nfp_net_ipsec_sa_data *sa_data; + struct nfp_ipsec_cfg_mssg msg; + int err; + + sa_data = &ipd->sa_entries[saidx]; + if (!sa_data->invalidated) { + err = nfp_ipsec_cfg_cmd_issue(nn, NFP_IPSEC_CFG_MSSG_INV_SA, saidx, &msg); + if (err) + nn_warn(nn, "Failed to invalidate SA in hardware\n"); + sa_data->invalidated = 1; + } else if (is_del) { + nn_warn(nn, "Unexpected invalidate state for offloaded saidx %d\n", saidx); + } } static void nfp_net_xfrm_del_state(struct xfrm_state *x) { + struct net_device *netdev = x->xso.dev; + struct nfp_net_ipsec_data *ipd; + struct nfp_net *nn; + + nn = netdev_priv(netdev); + ipd = nn->ipsec_data; + + nn_dbg(nn, "XFRM del state!\n"); + + if (x->xso.offload_handle == OFFLOAD_HANDLE_ERROR) { + nn_err(nn, "Invalid xfrm offload handle\n"); + return; + } + + mutex_lock(&ipd->lock); + xfrm_invalidate(nn, x->xso.offload_handle - 1, 1); + mutex_unlock(&ipd->lock); } static void nfp_net_xfrm_free_state(struct xfrm_state *x) { + struct net_device *netdev = x->xso.dev; + struct nfp_net_ipsec_data *ipd; + struct nfp_net *nn; + int saidx; + + nn = netdev_priv(netdev); + ipd = nn->ipsec_data; + + nn_dbg(nn, "XFRM free state!\n"); + + if (x->xso.offload_handle == OFFLOAD_HANDLE_ERROR) { + nn_err(nn, "Invalid xfrm offload handle\n"); + return; + } + + mutex_lock(&ipd->lock); + saidx = x->xso.offload_handle - 1; + xfrm_invalidate(nn, saidx, 0); + ipd->sa_entries[saidx].x = NULL; + /* Return saidx to free list */ + ipd->sa_free_stack[ipd->sa_free_cnt] = saidx; + ipd->sa_free_cnt++; + + mutex_unlock(&ipd->lock); } static bool nfp_net_ipsec_offload_ok(struct sk_buff *skb, struct xfrm_state *x) { - return false; + if (x->props.family == AF_INET) { + /* Offload with IPv4 options is not supported yet */ + if (ip_hdr(skb)->ihl != 5) + return false; + } else if (x->props.family == AF_INET6) { + /* Offload with IPv6 extension headers is not support yet */ + if (ipv6_ext_hdr(ipv6_hdr(skb)->nexthdr)) + return false; + } else { + return false; + } + + return true; } static const struct xfrmdev_ops nfp_net_ipsec_xfrmdev_ops = { diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net_common.c b/drivers/net/ethernet/netronome/nfp/nfp_net_common.c index 040c0c2aad80..0e48e2887278 100644 --- a/drivers/net/ethernet/netronome/nfp/nfp_net_common.c +++ b/drivers/net/ethernet/netronome/nfp/nfp_net_common.c @@ -2375,6 +2375,12 @@ static void nfp_net_netdev_init(struct nfp_net *nn) } if (nn->cap & NFP_NET_CFG_CTRL_RSS_ANY) netdev->hw_features |= NETIF_F_RXHASH; + +#ifdef CONFIG_NFP_NET_IPSEC + if (nn->cap_w1 & NFP_NET_CFG_CTRL_IPSEC) + netdev->hw_features |= NETIF_F_HW_ESP | NETIF_F_HW_ESP_TX_CSUM; +#endif + if (nn->cap & NFP_NET_CFG_CTRL_VXLAN) { if (nn->cap & NFP_NET_CFG_CTRL_LSO) { netdev->hw_features |= NETIF_F_GSO_UDP_TUNNEL | diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net_ctrl.h b/drivers/net/ethernet/netronome/nfp/nfp_net_ctrl.h index fff05496152d..b7e62d1186ca 100644 --- a/drivers/net/ethernet/netronome/nfp/nfp_net_ctrl.h +++ b/drivers/net/ethernet/netronome/nfp/nfp_net_ctrl.h @@ -399,14 +399,14 @@ */ #define NFP_NET_CFG_MBOX_BASE 0x1800 #define NFP_NET_CFG_MBOX_VAL_MAX_SZ 0x1F8 - +#define NFP_NET_CFG_MBOX_VAL 0x1808 #define NFP_NET_CFG_MBOX_SIMPLE_CMD 0x0 #define NFP_NET_CFG_MBOX_SIMPLE_RET 0x4 #define NFP_NET_CFG_MBOX_SIMPLE_VAL 0x8 #define NFP_NET_CFG_MBOX_CMD_CTAG_FILTER_ADD 1 #define NFP_NET_CFG_MBOX_CMD_CTAG_FILTER_KILL 2 - +#define NFP_NET_CFG_MBOX_CMD_IPSEC 3 #define NFP_NET_CFG_MBOX_CMD_PCI_DSCP_PRIOMAP_SET 5 #define NFP_NET_CFG_MBOX_CMD_TLV_CMSG 6