diff options
Diffstat (limited to 'drivers/net/ethernet/chelsio/inline_crypto/ch_ktls/chcr_ktls.c')
-rw-r--r-- | drivers/net/ethernet/chelsio/inline_crypto/ch_ktls/chcr_ktls.c | 2275 |
1 files changed, 2275 insertions, 0 deletions
diff --git a/drivers/net/ethernet/chelsio/inline_crypto/ch_ktls/chcr_ktls.c b/drivers/net/ethernet/chelsio/inline_crypto/ch_ktls/chcr_ktls.c new file mode 100644 index 0000000000..bcdc7fc2f4 --- /dev/null +++ b/drivers/net/ethernet/chelsio/inline_crypto/ch_ktls/chcr_ktls.c @@ -0,0 +1,2275 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* Copyright (C) 2020 Chelsio Communications. All rights reserved. */ + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#include <linux/skbuff.h> +#include <linux/module.h> +#include <linux/highmem.h> +#include <linux/ip.h> +#include <net/ipv6.h> +#include <linux/netdevice.h> +#include <crypto/aes.h> +#include "chcr_ktls.h" + +static LIST_HEAD(uld_ctx_list); +static DEFINE_MUTEX(dev_mutex); + +/* chcr_get_nfrags_to_send: get the remaining nfrags after start offset + * @skb: skb + * @start: start offset. + * @len: how much data to send after @start + */ +static int chcr_get_nfrags_to_send(struct sk_buff *skb, u32 start, u32 len) +{ + struct skb_shared_info *si = skb_shinfo(skb); + u32 frag_size, skb_linear_data_len = skb_headlen(skb); + u8 nfrags = 0, frag_idx = 0; + skb_frag_t *frag; + + /* if its a linear skb then return 1 */ + if (!skb_is_nonlinear(skb)) + return 1; + + if (unlikely(start < skb_linear_data_len)) { + frag_size = min(len, skb_linear_data_len - start); + } else { + start -= skb_linear_data_len; + + frag = &si->frags[frag_idx]; + frag_size = skb_frag_size(frag); + while (start >= frag_size) { + start -= frag_size; + frag_idx++; + frag = &si->frags[frag_idx]; + frag_size = skb_frag_size(frag); + } + frag_size = min(len, skb_frag_size(frag) - start); + } + len -= frag_size; + nfrags++; + + while (len) { + frag_size = min(len, skb_frag_size(&si->frags[frag_idx])); + len -= frag_size; + nfrags++; + frag_idx++; + } + return nfrags; +} + +static int chcr_init_tcb_fields(struct chcr_ktls_info *tx_info); +static void clear_conn_resources(struct chcr_ktls_info *tx_info); +/* + * chcr_ktls_save_keys: calculate and save crypto keys. + * @tx_info - driver specific tls info. + * @crypto_info - tls crypto information. + * @direction - TX/RX direction. + * return - SUCCESS/FAILURE. + */ +static int chcr_ktls_save_keys(struct chcr_ktls_info *tx_info, + struct tls_crypto_info *crypto_info, + enum tls_offload_ctx_dir direction) +{ + int ck_size, key_ctx_size, mac_key_size, keylen, ghash_size, ret; + unsigned char ghash_h[TLS_CIPHER_AES_GCM_256_TAG_SIZE]; + struct tls12_crypto_info_aes_gcm_128 *info_128_gcm; + struct ktls_key_ctx *kctx = &tx_info->key_ctx; + struct crypto_aes_ctx aes_ctx; + unsigned char *key, *salt; + + switch (crypto_info->cipher_type) { + case TLS_CIPHER_AES_GCM_128: + info_128_gcm = + (struct tls12_crypto_info_aes_gcm_128 *)crypto_info; + keylen = TLS_CIPHER_AES_GCM_128_KEY_SIZE; + ck_size = CHCR_KEYCTX_CIPHER_KEY_SIZE_128; + tx_info->salt_size = TLS_CIPHER_AES_GCM_128_SALT_SIZE; + mac_key_size = CHCR_KEYCTX_MAC_KEY_SIZE_128; + tx_info->iv_size = TLS_CIPHER_AES_GCM_128_IV_SIZE; + tx_info->iv = be64_to_cpu(*(__be64 *)info_128_gcm->iv); + + ghash_size = TLS_CIPHER_AES_GCM_128_TAG_SIZE; + key = info_128_gcm->key; + salt = info_128_gcm->salt; + tx_info->record_no = *(u64 *)info_128_gcm->rec_seq; + + /* The SCMD fields used when encrypting a full TLS + * record. Its a one time calculation till the + * connection exists. + */ + tx_info->scmd0_seqno_numivs = + SCMD_SEQ_NO_CTRL_V(CHCR_SCMD_SEQ_NO_CTRL_64BIT) | + SCMD_CIPH_AUTH_SEQ_CTRL_F | + SCMD_PROTO_VERSION_V(CHCR_SCMD_PROTO_VERSION_TLS) | + SCMD_CIPH_MODE_V(CHCR_SCMD_CIPHER_MODE_AES_GCM) | + SCMD_AUTH_MODE_V(CHCR_SCMD_AUTH_MODE_GHASH) | + SCMD_IV_SIZE_V(TLS_CIPHER_AES_GCM_128_IV_SIZE >> 1) | + SCMD_NUM_IVS_V(1); + + /* keys will be sent inline. */ + tx_info->scmd0_ivgen_hdrlen = SCMD_KEY_CTX_INLINE_F; + + /* The SCMD fields used when encrypting a partial TLS + * record (no trailer and possibly a truncated payload). + */ + tx_info->scmd0_short_seqno_numivs = + SCMD_CIPH_AUTH_SEQ_CTRL_F | + SCMD_PROTO_VERSION_V(CHCR_SCMD_PROTO_VERSION_GENERIC) | + SCMD_CIPH_MODE_V(CHCR_SCMD_CIPHER_MODE_AES_CTR) | + SCMD_IV_SIZE_V(AES_BLOCK_LEN >> 1); + + tx_info->scmd0_short_ivgen_hdrlen = + tx_info->scmd0_ivgen_hdrlen | SCMD_AADIVDROP_F; + + break; + + default: + pr_err("GCM: cipher type 0x%x not supported\n", + crypto_info->cipher_type); + ret = -EINVAL; + goto out; + } + + key_ctx_size = CHCR_KTLS_KEY_CTX_LEN + + roundup(keylen, 16) + ghash_size; + /* Calculate the H = CIPH(K, 0 repeated 16 times). + * It will go in key context + */ + + ret = aes_expandkey(&aes_ctx, key, keylen); + if (ret) + goto out; + + memset(ghash_h, 0, ghash_size); + aes_encrypt(&aes_ctx, ghash_h, ghash_h); + memzero_explicit(&aes_ctx, sizeof(aes_ctx)); + + /* fill the Key context */ + if (direction == TLS_OFFLOAD_CTX_DIR_TX) { + kctx->ctx_hdr = FILL_KEY_CTX_HDR(ck_size, + mac_key_size, + key_ctx_size >> 4); + } else { + ret = -EINVAL; + goto out; + } + + memcpy(kctx->salt, salt, tx_info->salt_size); + memcpy(kctx->key, key, keylen); + memcpy(kctx->key + keylen, ghash_h, ghash_size); + tx_info->key_ctx_len = key_ctx_size; + +out: + return ret; +} + +/* + * chcr_ktls_act_open_req: creates TCB entry for ipv4 connection. + * @sk - tcp socket. + * @tx_info - driver specific tls info. + * @atid - connection active tid. + * return - send success/failure. + */ +static int chcr_ktls_act_open_req(struct sock *sk, + struct chcr_ktls_info *tx_info, + int atid) +{ + struct inet_sock *inet = inet_sk(sk); + struct cpl_t6_act_open_req *cpl6; + struct cpl_act_open_req *cpl; + struct sk_buff *skb; + unsigned int len; + int qid_atid; + u64 options; + + len = sizeof(*cpl6); + skb = alloc_skb(len, GFP_KERNEL); + if (unlikely(!skb)) + return -ENOMEM; + /* mark it a control pkt */ + set_wr_txq(skb, CPL_PRIORITY_CONTROL, tx_info->port_id); + + cpl6 = __skb_put_zero(skb, len); + cpl = (struct cpl_act_open_req *)cpl6; + INIT_TP_WR(cpl6, 0); + qid_atid = TID_QID_V(tx_info->rx_qid) | + TID_TID_V(atid); + OPCODE_TID(cpl) = htonl(MK_OPCODE_TID(CPL_ACT_OPEN_REQ, qid_atid)); + cpl->local_port = inet->inet_sport; + cpl->peer_port = inet->inet_dport; + cpl->local_ip = inet->inet_rcv_saddr; + cpl->peer_ip = inet->inet_daddr; + + /* fill first 64 bit option field. */ + options = TCAM_BYPASS_F | ULP_MODE_V(ULP_MODE_NONE) | NON_OFFLOAD_F | + SMAC_SEL_V(tx_info->smt_idx) | TX_CHAN_V(tx_info->tx_chan); + cpl->opt0 = cpu_to_be64(options); + + /* next 64 bit option field. */ + options = + TX_QUEUE_V(tx_info->adap->params.tp.tx_modq[tx_info->tx_chan]); + cpl->opt2 = htonl(options); + + return cxgb4_l2t_send(tx_info->netdev, skb, tx_info->l2te); +} + +#if IS_ENABLED(CONFIG_IPV6) +/* + * chcr_ktls_act_open_req6: creates TCB entry for ipv6 connection. + * @sk - tcp socket. + * @tx_info - driver specific tls info. + * @atid - connection active tid. + * return - send success/failure. + */ +static int chcr_ktls_act_open_req6(struct sock *sk, + struct chcr_ktls_info *tx_info, + int atid) +{ + struct inet_sock *inet = inet_sk(sk); + struct cpl_t6_act_open_req6 *cpl6; + struct cpl_act_open_req6 *cpl; + struct sk_buff *skb; + unsigned int len; + int qid_atid; + u64 options; + + len = sizeof(*cpl6); + skb = alloc_skb(len, GFP_KERNEL); + if (unlikely(!skb)) + return -ENOMEM; + /* mark it a control pkt */ + set_wr_txq(skb, CPL_PRIORITY_CONTROL, tx_info->port_id); + + cpl6 = __skb_put_zero(skb, len); + cpl = (struct cpl_act_open_req6 *)cpl6; + INIT_TP_WR(cpl6, 0); + qid_atid = TID_QID_V(tx_info->rx_qid) | TID_TID_V(atid); + OPCODE_TID(cpl) = htonl(MK_OPCODE_TID(CPL_ACT_OPEN_REQ6, qid_atid)); + cpl->local_port = inet->inet_sport; + cpl->peer_port = inet->inet_dport; + cpl->local_ip_hi = *(__be64 *)&sk->sk_v6_rcv_saddr.in6_u.u6_addr8[0]; + cpl->local_ip_lo = *(__be64 *)&sk->sk_v6_rcv_saddr.in6_u.u6_addr8[8]; + cpl->peer_ip_hi = *(__be64 *)&sk->sk_v6_daddr.in6_u.u6_addr8[0]; + cpl->peer_ip_lo = *(__be64 *)&sk->sk_v6_daddr.in6_u.u6_addr8[8]; + + /* first 64 bit option field. */ + options = TCAM_BYPASS_F | ULP_MODE_V(ULP_MODE_NONE) | NON_OFFLOAD_F | + SMAC_SEL_V(tx_info->smt_idx) | TX_CHAN_V(tx_info->tx_chan); + cpl->opt0 = cpu_to_be64(options); + /* next 64 bit option field. */ + options = + TX_QUEUE_V(tx_info->adap->params.tp.tx_modq[tx_info->tx_chan]); + cpl->opt2 = htonl(options); + + return cxgb4_l2t_send(tx_info->netdev, skb, tx_info->l2te); +} +#endif /* #if IS_ENABLED(CONFIG_IPV6) */ + +/* + * chcr_setup_connection: create a TCB entry so that TP will form tcp packets. + * @sk - tcp socket. + * @tx_info - driver specific tls info. + * return: NET_TX_OK/NET_XMIT_DROP + */ +static int chcr_setup_connection(struct sock *sk, + struct chcr_ktls_info *tx_info) +{ + struct tid_info *t = &tx_info->adap->tids; + int atid, ret = 0; + + atid = cxgb4_alloc_atid(t, tx_info); + if (atid == -1) + return -EINVAL; + + tx_info->atid = atid; + + if (tx_info->ip_family == AF_INET) { + ret = chcr_ktls_act_open_req(sk, tx_info, atid); +#if IS_ENABLED(CONFIG_IPV6) + } else { + ret = cxgb4_clip_get(tx_info->netdev, (const u32 *) + &sk->sk_v6_rcv_saddr, + 1); + if (ret) + return ret; + ret = chcr_ktls_act_open_req6(sk, tx_info, atid); +#endif + } + + /* if return type is NET_XMIT_CN, msg will be sent but delayed, mark ret + * success, if any other return type clear atid and return that failure. + */ + if (ret) { + if (ret == NET_XMIT_CN) { + ret = 0; + } else { +#if IS_ENABLED(CONFIG_IPV6) + /* clear clip entry */ + if (tx_info->ip_family == AF_INET6) + cxgb4_clip_release(tx_info->netdev, + (const u32 *) + &sk->sk_v6_rcv_saddr, + 1); +#endif + cxgb4_free_atid(t, atid); + } + } + + return ret; +} + +/* + * chcr_set_tcb_field: update tcb fields. + * @tx_info - driver specific tls info. + * @word - TCB word. + * @mask - TCB word related mask. + * @val - TCB word related value. + * @no_reply - set 1 if not looking for TP response. + */ +static int chcr_set_tcb_field(struct chcr_ktls_info *tx_info, u16 word, + u64 mask, u64 val, int no_reply) +{ + struct cpl_set_tcb_field *req; + struct sk_buff *skb; + + skb = alloc_skb(sizeof(struct cpl_set_tcb_field), GFP_ATOMIC); + if (!skb) + return -ENOMEM; + + req = (struct cpl_set_tcb_field *)__skb_put_zero(skb, sizeof(*req)); + INIT_TP_WR_CPL(req, CPL_SET_TCB_FIELD, tx_info->tid); + req->reply_ctrl = htons(QUEUENO_V(tx_info->rx_qid) | + NO_REPLY_V(no_reply)); + req->word_cookie = htons(TCB_WORD_V(word)); + req->mask = cpu_to_be64(mask); + req->val = cpu_to_be64(val); + + set_wr_txq(skb, CPL_PRIORITY_CONTROL, tx_info->port_id); + return cxgb4_ofld_send(tx_info->netdev, skb); +} + +/* + * chcr_ktls_dev_del: call back for tls_dev_del. + * Remove the tid and l2t entry and close the connection. + * it per connection basis. + * @netdev - net device. + * @tls_cts - tls context. + * @direction - TX/RX crypto direction + */ +static void chcr_ktls_dev_del(struct net_device *netdev, + struct tls_context *tls_ctx, + enum tls_offload_ctx_dir direction) +{ + struct chcr_ktls_ofld_ctx_tx *tx_ctx = + chcr_get_ktls_tx_context(tls_ctx); + struct chcr_ktls_info *tx_info = tx_ctx->chcr_info; + struct ch_ktls_port_stats_debug *port_stats; + struct chcr_ktls_uld_ctx *u_ctx; + + if (!tx_info) + return; + + u_ctx = tx_info->adap->uld[CXGB4_ULD_KTLS].handle; + if (u_ctx && u_ctx->detach) + return; + /* clear l2t entry */ + if (tx_info->l2te) + cxgb4_l2t_release(tx_info->l2te); + +#if IS_ENABLED(CONFIG_IPV6) + /* clear clip entry */ + if (tx_info->ip_family == AF_INET6) + cxgb4_clip_release(netdev, (const u32 *) + &tx_info->sk->sk_v6_rcv_saddr, + 1); +#endif + + /* clear tid */ + if (tx_info->tid != -1) { + cxgb4_remove_tid(&tx_info->adap->tids, tx_info->tx_chan, + tx_info->tid, tx_info->ip_family); + + xa_erase(&u_ctx->tid_list, tx_info->tid); + } + + port_stats = &tx_info->adap->ch_ktls_stats.ktls_port[tx_info->port_id]; + atomic64_inc(&port_stats->ktls_tx_connection_close); + kvfree(tx_info); + tx_ctx->chcr_info = NULL; + /* release module refcount */ + module_put(THIS_MODULE); +} + +/* + * chcr_ktls_dev_add: call back for tls_dev_add. + * Create a tcb entry for TP. Also add l2t entry for the connection. And + * generate keys & save those keys locally. + * @netdev - net device. + * @tls_cts - tls context. + * @direction - TX/RX crypto direction + * return: SUCCESS/FAILURE. + */ +static int chcr_ktls_dev_add(struct net_device *netdev, struct sock *sk, + enum tls_offload_ctx_dir direction, + struct tls_crypto_info *crypto_info, + u32 start_offload_tcp_sn) +{ + struct tls_context *tls_ctx = tls_get_ctx(sk); + struct ch_ktls_port_stats_debug *port_stats; + struct chcr_ktls_ofld_ctx_tx *tx_ctx; + struct chcr_ktls_uld_ctx *u_ctx; + struct chcr_ktls_info *tx_info; + struct dst_entry *dst; + struct adapter *adap; + struct port_info *pi; + struct neighbour *n; + u8 daaddr[16]; + int ret = -1; + + tx_ctx = chcr_get_ktls_tx_context(tls_ctx); + + pi = netdev_priv(netdev); + adap = pi->adapter; + port_stats = &adap->ch_ktls_stats.ktls_port[pi->port_id]; + atomic64_inc(&port_stats->ktls_tx_connection_open); + u_ctx = adap->uld[CXGB4_ULD_KTLS].handle; + + if (direction == TLS_OFFLOAD_CTX_DIR_RX) { + pr_err("not expecting for RX direction\n"); + goto out; + } + + if (tx_ctx->chcr_info) + goto out; + + if (u_ctx && u_ctx->detach) + goto out; + + tx_info = kvzalloc(sizeof(*tx_info), GFP_KERNEL); + if (!tx_info) + goto out; + + tx_info->sk = sk; + spin_lock_init(&tx_info->lock); + /* initialize tid and atid to -1, 0 is a also a valid id. */ + tx_info->tid = -1; + tx_info->atid = -1; + + tx_info->adap = adap; + tx_info->netdev = netdev; + tx_info->first_qset = pi->first_qset; + tx_info->tx_chan = pi->tx_chan; + tx_info->smt_idx = pi->smt_idx; + tx_info->port_id = pi->port_id; + tx_info->prev_ack = 0; + tx_info->prev_win = 0; + + tx_info->rx_qid = chcr_get_first_rx_qid(adap); + if (unlikely(tx_info->rx_qid < 0)) + goto free_tx_info; + + tx_info->prev_seq = start_offload_tcp_sn; + tx_info->tcp_start_seq_number = start_offload_tcp_sn; + + /* save crypto keys */ + ret = chcr_ktls_save_keys(tx_info, crypto_info, direction); + if (ret < 0) + goto free_tx_info; + + /* get peer ip */ + if (sk->sk_family == AF_INET) { + memcpy(daaddr, &sk->sk_daddr, 4); + tx_info->ip_family = AF_INET; +#if IS_ENABLED(CONFIG_IPV6) + } else { + if (!ipv6_only_sock(sk) && + ipv6_addr_type(&sk->sk_v6_daddr) == IPV6_ADDR_MAPPED) { + memcpy(daaddr, &sk->sk_daddr, 4); + tx_info->ip_family = AF_INET; + } else { + memcpy(daaddr, sk->sk_v6_daddr.in6_u.u6_addr8, 16); + tx_info->ip_family = AF_INET6; + } +#endif + } + + /* get the l2t index */ + dst = sk_dst_get(sk); + if (!dst) { + pr_err("DST entry not found\n"); + goto free_tx_info; + } + n = dst_neigh_lookup(dst, daaddr); + if (!n || !n->dev) { + pr_err("neighbour not found\n"); + dst_release(dst); + goto free_tx_info; + } + tx_info->l2te = cxgb4_l2t_get(adap->l2t, n, n->dev, 0); + + neigh_release(n); + dst_release(dst); + + if (!tx_info->l2te) { + pr_err("l2t entry not found\n"); + goto free_tx_info; + } + + /* Driver shouldn't be removed until any single connection exists */ + if (!try_module_get(THIS_MODULE)) + goto free_l2t; + + init_completion(&tx_info->completion); + /* create a filter and call cxgb4_l2t_send to send the packet out, which + * will take care of updating l2t entry in hw if not already done. + */ + tx_info->open_state = CH_KTLS_OPEN_PENDING; + + if (chcr_setup_connection(sk, tx_info)) + goto put_module; + + /* Wait for reply */ + wait_for_completion_timeout(&tx_info->completion, 30 * HZ); + spin_lock_bh(&tx_info->lock); + if (tx_info->open_state) { + /* need to wait for hw response, can't free tx_info yet. */ + if (tx_info->open_state == CH_KTLS_OPEN_PENDING) + tx_info->pending_close = true; + else + spin_unlock_bh(&tx_info->lock); + /* if in pending close, free the lock after the cleanup */ + goto put_module; + } + spin_unlock_bh(&tx_info->lock); + + /* initialize tcb */ + reinit_completion(&tx_info->completion); + /* mark it pending for hw response */ + tx_info->open_state = CH_KTLS_OPEN_PENDING; + + if (chcr_init_tcb_fields(tx_info)) + goto free_tid; + + /* Wait for reply */ + wait_for_completion_timeout(&tx_info->completion, 30 * HZ); + spin_lock_bh(&tx_info->lock); + if (tx_info->open_state) { + /* need to wait for hw response, can't free tx_info yet. */ + tx_info->pending_close = true; + /* free the lock after cleanup */ + goto free_tid; + } + spin_unlock_bh(&tx_info->lock); + + if (!cxgb4_check_l2t_valid(tx_info->l2te)) + goto free_tid; + + atomic64_inc(&port_stats->ktls_tx_ctx); + tx_ctx->chcr_info = tx_info; + + return 0; + +free_tid: +#if IS_ENABLED(CONFIG_IPV6) + /* clear clip entry */ + if (tx_info->ip_family == AF_INET6) + cxgb4_clip_release(netdev, (const u32 *) + &sk->sk_v6_rcv_saddr, + 1); +#endif + cxgb4_remove_tid(&tx_info->adap->tids, tx_info->tx_chan, + tx_info->tid, tx_info->ip_family); + + xa_erase(&u_ctx->tid_list, tx_info->tid); + +put_module: + /* release module refcount */ + module_put(THIS_MODULE); +free_l2t: + cxgb4_l2t_release(tx_info->l2te); +free_tx_info: + if (tx_info->pending_close) + spin_unlock_bh(&tx_info->lock); + else + kvfree(tx_info); +out: + atomic64_inc(&port_stats->ktls_tx_connection_fail); + return -1; +} + +/* + * chcr_init_tcb_fields: Initialize tcb fields to handle TCP seq number + * handling. + * @tx_info - driver specific tls info. + * return: NET_TX_OK/NET_XMIT_DROP + */ +static int chcr_init_tcb_fields(struct chcr_ktls_info *tx_info) +{ + int ret = 0; + + /* set tcb in offload and bypass */ + ret = + chcr_set_tcb_field(tx_info, TCB_T_FLAGS_W, + TCB_T_FLAGS_V(TF_CORE_BYPASS_F | TF_NON_OFFLOAD_F), + TCB_T_FLAGS_V(TF_CORE_BYPASS_F), 1); + if (ret) + return ret; + /* reset snd_una and snd_next fields in tcb */ + ret = chcr_set_tcb_field(tx_info, TCB_SND_UNA_RAW_W, + TCB_SND_NXT_RAW_V(TCB_SND_NXT_RAW_M) | + TCB_SND_UNA_RAW_V(TCB_SND_UNA_RAW_M), + 0, 1); + if (ret) + return ret; + + /* reset send max */ + ret = chcr_set_tcb_field(tx_info, TCB_SND_MAX_RAW_W, + TCB_SND_MAX_RAW_V(TCB_SND_MAX_RAW_M), + 0, 1); + if (ret) + return ret; + + /* update l2t index and request for tp reply to confirm tcb is + * initialised to handle tx traffic. + */ + ret = chcr_set_tcb_field(tx_info, TCB_L2T_IX_W, + TCB_L2T_IX_V(TCB_L2T_IX_M), + TCB_L2T_IX_V(tx_info->l2te->idx), 0); + return ret; +} + +/* + * chcr_ktls_cpl_act_open_rpl: connection reply received from TP. + */ +static int chcr_ktls_cpl_act_open_rpl(struct adapter *adap, + unsigned char *input) +{ + const struct cpl_act_open_rpl *p = (void *)input; + struct chcr_ktls_info *tx_info = NULL; + struct chcr_ktls_ofld_ctx_tx *tx_ctx; + struct chcr_ktls_uld_ctx *u_ctx; + unsigned int atid, tid, status; + struct tls_context *tls_ctx; + struct tid_info *t; + int ret = 0; + + tid = GET_TID(p); + status = AOPEN_STATUS_G(ntohl(p->atid_status)); + atid = TID_TID_G(AOPEN_ATID_G(ntohl(p->atid_status))); + + t = &adap->tids; + tx_info = lookup_atid(t, atid); + + if (!tx_info || tx_info->atid != atid) { + pr_err("%s: incorrect tx_info or atid\n", __func__); + return -1; + } + + cxgb4_free_atid(t, atid); + tx_info->atid = -1; + + spin_lock(&tx_info->lock); + /* HW response is very close, finish pending cleanup */ + if (tx_info->pending_close) { + spin_unlock(&tx_info->lock); + if (!status) { + cxgb4_remove_tid(&tx_info->adap->tids, tx_info->tx_chan, + tid, tx_info->ip_family); + } + kvfree(tx_info); + return 0; + } + + if (!status) { + tx_info->tid = tid; + cxgb4_insert_tid(t, tx_info, tx_info->tid, tx_info->ip_family); + /* Adding tid */ + tls_ctx = tls_get_ctx(tx_info->sk); + tx_ctx = chcr_get_ktls_tx_context(tls_ctx); + u_ctx = adap->uld[CXGB4_ULD_KTLS].handle; + if (u_ctx) { + ret = xa_insert_bh(&u_ctx->tid_list, tid, tx_ctx, + GFP_NOWAIT); + if (ret < 0) { + pr_err("%s: Failed to allocate tid XA entry = %d\n", + __func__, tx_info->tid); + tx_info->open_state = CH_KTLS_OPEN_FAILURE; + goto out; + } + } + tx_info->open_state = CH_KTLS_OPEN_SUCCESS; + } else { + tx_info->open_state = CH_KTLS_OPEN_FAILURE; + } +out: + spin_unlock(&tx_info->lock); + + complete(&tx_info->completion); + return ret; +} + +/* + * chcr_ktls_cpl_set_tcb_rpl: TCB reply received from TP. + */ +static int chcr_ktls_cpl_set_tcb_rpl(struct adapter *adap, unsigned char *input) +{ + const struct cpl_set_tcb_rpl *p = (void *)input; + struct chcr_ktls_info *tx_info = NULL; + struct tid_info *t; + u32 tid; + + tid = GET_TID(p); + + t = &adap->tids; + tx_info = lookup_tid(t, tid); + + if (!tx_info || tx_info->tid != tid) { + pr_err("%s: incorrect tx_info or tid\n", __func__); + return -1; + } + + spin_lock(&tx_info->lock); + if (tx_info->pending_close) { + spin_unlock(&tx_info->lock); + kvfree(tx_info); + return 0; + } + tx_info->open_state = CH_KTLS_OPEN_SUCCESS; + spin_unlock(&tx_info->lock); + + complete(&tx_info->completion); + return 0; +} + +static void *__chcr_write_cpl_set_tcb_ulp(struct chcr_ktls_info *tx_info, + u32 tid, void *pos, u16 word, + struct sge_eth_txq *q, u64 mask, + u64 val, u32 reply) +{ + struct cpl_set_tcb_field_core *cpl; + struct ulptx_idata *idata; + struct ulp_txpkt *txpkt; + + /* ULP_TXPKT */ + txpkt = pos; + txpkt->cmd_dest = htonl(ULPTX_CMD_V(ULP_TX_PKT) | + ULP_TXPKT_CHANNELID_V(tx_info->port_id) | + ULP_TXPKT_FID_V(q->q.cntxt_id) | + ULP_TXPKT_RO_F); + txpkt->len = htonl(DIV_ROUND_UP(CHCR_SET_TCB_FIELD_LEN, 16)); + + /* ULPTX_IDATA sub-command */ + idata = (struct ulptx_idata *)(txpkt + 1); + idata->cmd_more = htonl(ULPTX_CMD_V(ULP_TX_SC_IMM)); + idata->len = htonl(sizeof(*cpl)); + pos = idata + 1; + + cpl = pos; + /* CPL_SET_TCB_FIELD */ + OPCODE_TID(cpl) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, tid)); + cpl->reply_ctrl = htons(QUEUENO_V(tx_info->rx_qid) | + NO_REPLY_V(!reply)); + cpl->word_cookie = htons(TCB_WORD_V(word)); + cpl->mask = cpu_to_be64(mask); + cpl->val = cpu_to_be64(val); + + /* ULPTX_NOOP */ + idata = (struct ulptx_idata *)(cpl + 1); + idata->cmd_more = htonl(ULPTX_CMD_V(ULP_TX_SC_NOOP)); + idata->len = htonl(0); + pos = idata + 1; + + return pos; +} + + +/* + * chcr_write_cpl_set_tcb_ulp: update tcb values. + * TCB is responsible to create tcp headers, so all the related values + * should be correctly updated. + * @tx_info - driver specific tls info. + * @q - tx queue on which packet is going out. + * @tid - TCB identifier. + * @pos - current index where should we start writing. + * @word - TCB word. + * @mask - TCB word related mask. + * @val - TCB word related value. + * @reply - set 1 if looking for TP response. + * return - next position to write. + */ +static void *chcr_write_cpl_set_tcb_ulp(struct chcr_ktls_info *tx_info, + struct sge_eth_txq *q, u32 tid, + void *pos, u16 word, u64 mask, + u64 val, u32 reply) +{ + int left = (void *)q->q.stat - pos; + + if (unlikely(left < CHCR_SET_TCB_FIELD_LEN)) { + if (!left) { + pos = q->q.desc; + } else { + u8 buf[48] = {0}; + + __chcr_write_cpl_set_tcb_ulp(tx_info, tid, buf, word, q, + mask, val, reply); + + return chcr_copy_to_txd(buf, &q->q, pos, + CHCR_SET_TCB_FIELD_LEN); + } + } + + pos = __chcr_write_cpl_set_tcb_ulp(tx_info, tid, pos, word, q, + mask, val, reply); + + /* check again if we are at the end of the queue */ + if (left == CHCR_SET_TCB_FIELD_LEN) + pos = q->q.desc; + + return pos; +} + +/* + * chcr_ktls_xmit_tcb_cpls: update tcb entry so that TP will create the header + * with updated values like tcp seq, ack, window etc. + * @tx_info - driver specific tls info. + * @q - TX queue. + * @tcp_seq + * @tcp_ack + * @tcp_win + * return: NETDEV_TX_BUSY/NET_TX_OK. + */ +static int chcr_ktls_xmit_tcb_cpls(struct chcr_ktls_info *tx_info, + struct sge_eth_txq *q, u64 tcp_seq, + u64 tcp_ack, u64 tcp_win, bool offset) +{ + bool first_wr = ((tx_info->prev_ack == 0) && (tx_info->prev_win == 0)); + struct ch_ktls_port_stats_debug *port_stats; + u32 len, cpl = 0, ndesc, wr_len, wr_mid = 0; + struct fw_ulptx_wr *wr; + int credits; + void *pos; + + wr_len = sizeof(*wr); + /* there can be max 4 cpls, check if we have enough credits */ + len = wr_len + 4 * roundup(CHCR_SET_TCB_FIELD_LEN, 16); + ndesc = DIV_ROUND_UP(len, 64); + + credits = chcr_txq_avail(&q->q) - ndesc; + if (unlikely(credits < 0)) { + chcr_eth_txq_stop(q); + return NETDEV_TX_BUSY; + } + + if (unlikely(credits < ETHTXQ_STOP_THRES)) { + chcr_eth_txq_stop(q); + wr_mid |= FW_WR_EQUEQ_F | FW_WR_EQUIQ_F; + } + + pos = &q->q.desc[q->q.pidx]; + /* make space for WR, we'll fill it later when we know all the cpls + * being sent out and have complete length. + */ + wr = pos; + pos += wr_len; + /* update tx_max if its a re-transmit or the first wr */ + if (first_wr || tcp_seq != tx_info->prev_seq) { + pos = chcr_write_cpl_set_tcb_ulp(tx_info, q, tx_info->tid, pos, + TCB_TX_MAX_W, + TCB_TX_MAX_V(TCB_TX_MAX_M), + TCB_TX_MAX_V(tcp_seq), 0); + cpl++; + } + /* reset snd una if it's a re-transmit pkt */ + if (tcp_seq != tx_info->prev_seq || offset) { + /* reset snd_una */ + port_stats = + &tx_info->adap->ch_ktls_stats.ktls_port[tx_info->port_id]; + pos = chcr_write_cpl_set_tcb_ulp(tx_info, q, tx_info->tid, pos, + TCB_SND_UNA_RAW_W, + TCB_SND_UNA_RAW_V + (TCB_SND_UNA_RAW_M), + TCB_SND_UNA_RAW_V(0), 0); + if (tcp_seq != tx_info->prev_seq) + atomic64_inc(&port_stats->ktls_tx_ooo); + cpl++; + } + /* update ack */ + if (first_wr || tx_info->prev_ack != tcp_ack) { + pos = chcr_write_cpl_set_tcb_ulp(tx_info, q, tx_info->tid, pos, + TCB_RCV_NXT_W, + TCB_RCV_NXT_V(TCB_RCV_NXT_M), + TCB_RCV_NXT_V(tcp_ack), 0); + tx_info->prev_ack = tcp_ack; + cpl++; + } + /* update receive window */ + if (first_wr || tx_info->prev_win != tcp_win) { + chcr_write_cpl_set_tcb_ulp(tx_info, q, tx_info->tid, pos, + TCB_RCV_WND_W, + TCB_RCV_WND_V(TCB_RCV_WND_M), + TCB_RCV_WND_V(tcp_win), 0); + tx_info->prev_win = tcp_win; + cpl++; + } + + if (cpl) { + /* get the actual length */ + len = wr_len + cpl * roundup(CHCR_SET_TCB_FIELD_LEN, 16); + /* ULPTX wr */ + wr->op_to_compl = htonl(FW_WR_OP_V(FW_ULPTX_WR)); + wr->cookie = 0; + /* fill len in wr field */ + wr->flowid_len16 = htonl(wr_mid | + FW_WR_LEN16_V(DIV_ROUND_UP(len, 16))); + + ndesc = DIV_ROUND_UP(len, 64); + chcr_txq_advance(&q->q, ndesc); + cxgb4_ring_tx_db(tx_info->adap, &q->q, ndesc); + } + return 0; +} + +/* + * chcr_ktls_get_tx_flits + * returns number of flits to be sent out, it includes key context length, WR + * size and skb fragments. + */ +static unsigned int +chcr_ktls_get_tx_flits(u32 nr_frags, unsigned int key_ctx_len) +{ + return chcr_sgl_len(nr_frags) + + DIV_ROUND_UP(key_ctx_len + CHCR_KTLS_WR_SIZE, 8); +} + +/* + * chcr_ktls_check_tcp_options: To check if there is any TCP option available + * other than timestamp. + * @skb - skb contains partial record.. + * return: 1 / 0 + */ +static int +chcr_ktls_check_tcp_options(struct tcphdr *tcp) +{ + int cnt, opt, optlen; + u_char *cp; + + cp = (u_char *)(tcp + 1); + cnt = (tcp->doff << 2) - sizeof(struct tcphdr); + for (; cnt > 0; cnt -= optlen, cp += optlen) { + opt = cp[0]; + if (opt == TCPOPT_EOL) + break; + if (opt == TCPOPT_NOP) { + optlen = 1; + } else { + if (cnt < 2) + break; + optlen = cp[1]; + if (optlen < 2 || optlen > cnt) + break; + } + switch (opt) { + case TCPOPT_NOP: + break; + default: + return 1; + } + } + return 0; +} + +/* + * chcr_ktls_write_tcp_options : TP can't send out all the options, we need to + * send out separately. + * @tx_info - driver specific tls info. + * @skb - skb contains partial record.. + * @q - TX queue. + * @tx_chan - channel number. + * return: NETDEV_TX_OK/NETDEV_TX_BUSY. + */ +static int +chcr_ktls_write_tcp_options(struct chcr_ktls_info *tx_info, struct sk_buff *skb, + struct sge_eth_txq *q, uint32_t tx_chan) +{ + struct fw_eth_tx_pkt_wr *wr; + struct cpl_tx_pkt_core *cpl; + u32 ctrl, iplen, maclen; + struct ipv6hdr *ip6; + unsigned int ndesc; + struct tcphdr *tcp; + int len16, pktlen; + struct iphdr *ip; + u32 wr_mid = 0; + int credits; + u8 buf[150]; + u64 cntrl1; + void *pos; + + iplen = skb_network_header_len(skb); + maclen = skb_mac_header_len(skb); + + /* packet length = eth hdr len + ip hdr len + tcp hdr len + * (including options). + */ + pktlen = skb_tcp_all_headers(skb); + + ctrl = sizeof(*cpl) + pktlen; + len16 = DIV_ROUND_UP(sizeof(*wr) + ctrl, 16); + /* check how many descriptors needed */ + ndesc = DIV_ROUND_UP(len16, 4); + + credits = chcr_txq_avail(&q->q) - ndesc; + if (unlikely(credits < 0)) { + chcr_eth_txq_stop(q); + return NETDEV_TX_BUSY; + } + + if (unlikely(credits < ETHTXQ_STOP_THRES)) { + chcr_eth_txq_stop(q); + wr_mid |= FW_WR_EQUEQ_F | FW_WR_EQUIQ_F; + } + + pos = &q->q.desc[q->q.pidx]; + wr = pos; + + /* Firmware work request header */ + wr->op_immdlen = htonl(FW_WR_OP_V(FW_ETH_TX_PKT_WR) | + FW_WR_IMMDLEN_V(ctrl)); + + wr->equiq_to_len16 = htonl(wr_mid | FW_WR_LEN16_V(len16)); + wr->r3 = 0; + + cpl = (void *)(wr + 1); + + /* CPL header */ + cpl->ctrl0 = htonl(TXPKT_OPCODE_V(CPL_TX_PKT) | TXPKT_INTF_V(tx_chan) | + TXPKT_PF_V(tx_info->adap->pf)); + cpl->pack = 0; + cpl->len = htons(pktlen); + + memcpy(buf, skb->data, pktlen); + if (!IS_ENABLED(CONFIG_IPV6) || tx_info->ip_family == AF_INET) { + /* we need to correct ip header len */ + ip = (struct iphdr *)(buf + maclen); + ip->tot_len = htons(pktlen - maclen); + cntrl1 = TXPKT_CSUM_TYPE_V(TX_CSUM_TCPIP); + } else { + ip6 = (struct ipv6hdr *)(buf + maclen); + ip6->payload_len = htons(pktlen - maclen - iplen); + cntrl1 = TXPKT_CSUM_TYPE_V(TX_CSUM_TCPIP6); + } + + cntrl1 |= T6_TXPKT_ETHHDR_LEN_V(maclen - ETH_HLEN) | + TXPKT_IPHDR_LEN_V(iplen); + /* checksum offload */ + cpl->ctrl1 = cpu_to_be64(cntrl1); + + pos = cpl + 1; + + /* now take care of the tcp header, if fin is not set then clear push + * bit as well, and if fin is set, it will be sent at the last so we + * need to update the tcp sequence number as per the last packet. + */ + tcp = (struct tcphdr *)(buf + maclen + iplen); + + if (!tcp->fin) + tcp->psh = 0; + else + tcp->seq = htonl(tx_info->prev_seq); + + chcr_copy_to_txd(buf, &q->q, pos, pktlen); + + chcr_txq_advance(&q->q, ndesc); + cxgb4_ring_tx_db(tx_info->adap, &q->q, ndesc); + return 0; +} + +/* + * chcr_ktls_xmit_wr_complete: This sends out the complete record. If an skb + * received has partial end part of the record, send out the complete record, so + * that crypto block will be able to generate TAG/HASH. + * @skb - segment which has complete or partial end part. + * @tx_info - driver specific tls info. + * @q - TX queue. + * @tcp_seq + * @tcp_push - tcp push bit. + * @mss - segment size. + * return: NETDEV_TX_BUSY/NET_TX_OK. + */ +static int chcr_ktls_xmit_wr_complete(struct sk_buff *skb, + struct chcr_ktls_info *tx_info, + struct sge_eth_txq *q, u32 tcp_seq, + bool is_last_wr, u32 data_len, + u32 skb_offset, u32 nfrags, + bool tcp_push, u32 mss) +{ + u32 len16, wr_mid = 0, flits = 0, ndesc, cipher_start; + struct adapter *adap = tx_info->adap; + int credits, left, last_desc; + struct tx_sw_desc *sgl_sdesc; + struct cpl_tx_data *tx_data; + struct cpl_tx_sec_pdu *cpl; + struct ulptx_idata *idata; + struct ulp_txpkt *ulptx; + struct fw_ulptx_wr *wr; + void *pos; + u64 *end; + + /* get the number of flits required */ + flits = chcr_ktls_get_tx_flits(nfrags, tx_info->key_ctx_len); + /* number of descriptors */ + ndesc = chcr_flits_to_desc(flits); + /* check if enough credits available */ + credits = chcr_txq_avail(&q->q) - ndesc; + if (unlikely(credits < 0)) { + chcr_eth_txq_stop(q); + return NETDEV_TX_BUSY; + } + + if (unlikely(credits < ETHTXQ_STOP_THRES)) { + /* Credits are below the threshold values, stop the queue after + * injecting the Work Request for this packet. + */ + chcr_eth_txq_stop(q); + wr_mid |= FW_WR_EQUEQ_F | FW_WR_EQUIQ_F; + } + + last_desc = q->q.pidx + ndesc - 1; + if (last_desc >= q->q.size) + last_desc -= q->q.size; + sgl_sdesc = &q->q.sdesc[last_desc]; + + if (unlikely(cxgb4_map_skb(adap->pdev_dev, skb, sgl_sdesc->addr) < 0)) { + memset(sgl_sdesc->addr, 0, sizeof(sgl_sdesc->addr)); + q->mapping_err++; + return NETDEV_TX_BUSY; + } + + if (!is_last_wr) + skb_get(skb); + + pos = &q->q.desc[q->q.pidx]; + end = (u64 *)pos + flits; + /* FW_ULPTX_WR */ + wr = pos; + /* WR will need len16 */ + len16 = DIV_ROUND_UP(flits, 2); + wr->op_to_compl = htonl(FW_WR_OP_V(FW_ULPTX_WR)); + wr->flowid_len16 = htonl(wr_mid | FW_WR_LEN16_V(len16)); + wr->cookie = 0; + pos += sizeof(*wr); + /* ULP_TXPKT */ + ulptx = pos; + ulptx->cmd_dest = htonl(ULPTX_CMD_V(ULP_TX_PKT) | + ULP_TXPKT_CHANNELID_V(tx_info->port_id) | + ULP_TXPKT_FID_V(q->q.cntxt_id) | + ULP_TXPKT_RO_F); + ulptx->len = htonl(len16 - 1); + /* ULPTX_IDATA sub-command */ + idata = (struct ulptx_idata *)(ulptx + 1); + idata->cmd_more = htonl(ULPTX_CMD_V(ULP_TX_SC_IMM) | ULP_TX_SC_MORE_F); + /* idata length will include cpl_tx_sec_pdu + key context size + + * cpl_tx_data header. + */ + idata->len = htonl(sizeof(*cpl) + tx_info->key_ctx_len + + sizeof(*tx_data)); + /* SEC CPL */ + cpl = (struct cpl_tx_sec_pdu *)(idata + 1); + cpl->op_ivinsrtofst = + htonl(CPL_TX_SEC_PDU_OPCODE_V(CPL_TX_SEC_PDU) | + CPL_TX_SEC_PDU_CPLLEN_V(CHCR_CPL_TX_SEC_PDU_LEN_64BIT) | + CPL_TX_SEC_PDU_PLACEHOLDER_V(1) | + CPL_TX_SEC_PDU_IVINSRTOFST_V(TLS_HEADER_SIZE + 1)); + cpl->pldlen = htonl(data_len); + + /* encryption should start after tls header size + iv size */ + cipher_start = TLS_HEADER_SIZE + tx_info->iv_size + 1; + + cpl->aadstart_cipherstop_hi = + htonl(CPL_TX_SEC_PDU_AADSTART_V(1) | + CPL_TX_SEC_PDU_AADSTOP_V(TLS_HEADER_SIZE) | + CPL_TX_SEC_PDU_CIPHERSTART_V(cipher_start)); + + /* authentication will also start after tls header + iv size */ + cpl->cipherstop_lo_authinsert = + htonl(CPL_TX_SEC_PDU_AUTHSTART_V(cipher_start) | + CPL_TX_SEC_PDU_AUTHSTOP_V(TLS_CIPHER_AES_GCM_128_TAG_SIZE) | + CPL_TX_SEC_PDU_AUTHINSERT_V(TLS_CIPHER_AES_GCM_128_TAG_SIZE)); + + /* These two flits are actually a CPL_TLS_TX_SCMD_FMT. */ + cpl->seqno_numivs = htonl(tx_info->scmd0_seqno_numivs); + cpl->ivgen_hdrlen = htonl(tx_info->scmd0_ivgen_hdrlen); + cpl->scmd1 = cpu_to_be64(tx_info->record_no); + + pos = cpl + 1; + /* check if space left to fill the keys */ + left = (void *)q->q.stat - pos; + if (!left) { + left = (void *)end - (void *)q->q.stat; + pos = q->q.desc; + end = pos + left; + } + + pos = chcr_copy_to_txd(&tx_info->key_ctx, &q->q, pos, + tx_info->key_ctx_len); + left = (void *)q->q.stat - pos; + + if (!left) { + left = (void *)end - (void *)q->q.stat; + pos = q->q.desc; + end = pos + left; + } + /* CPL_TX_DATA */ + tx_data = (void *)pos; + OPCODE_TID(tx_data) = htonl(MK_OPCODE_TID(CPL_TX_DATA, tx_info->tid)); + tx_data->len = htonl(TX_DATA_MSS_V(mss) | TX_LENGTH_V(data_len)); + + tx_data->rsvd = htonl(tcp_seq); + + tx_data->flags = htonl(TX_BYPASS_F); + if (tcp_push) + tx_data->flags |= htonl(TX_PUSH_F | TX_SHOVE_F); + + /* check left again, it might go beyond queue limit */ + pos = tx_data + 1; + left = (void *)q->q.stat - pos; + + /* check the position again */ + if (!left) { + left = (void *)end - (void *)q->q.stat; + pos = q->q.desc; + end = pos + left; + } + + /* send the complete packet except the header */ + cxgb4_write_partial_sgl(skb, &q->q, pos, end, sgl_sdesc->addr, + skb_offset, data_len); + sgl_sdesc->skb = skb; + + chcr_txq_advance(&q->q, ndesc); + cxgb4_ring_tx_db(adap, &q->q, ndesc); + atomic64_inc(&adap->ch_ktls_stats.ktls_tx_send_records); + + return 0; +} + +/* + * chcr_ktls_xmit_wr_short: This is to send out partial records. If its + * a middle part of a record, fetch the prior data to make it 16 byte aligned + * and then only send it out. + * + * @skb - skb contains partial record.. + * @tx_info - driver specific tls info. + * @q - TX queue. + * @tcp_seq + * @tcp_push - tcp push bit. + * @mss - segment size. + * @tls_rec_offset - offset from start of the tls record. + * @perior_data - data before the current segment, required to make this record + * 16 byte aligned. + * @prior_data_len - prior_data length (less than 16) + * return: NETDEV_TX_BUSY/NET_TX_OK. + */ +static int chcr_ktls_xmit_wr_short(struct sk_buff *skb, + struct chcr_ktls_info *tx_info, + struct sge_eth_txq *q, + u32 tcp_seq, bool tcp_push, u32 mss, + u32 tls_rec_offset, u8 *prior_data, + u32 prior_data_len, u32 data_len, + u32 skb_offset) +{ + u32 len16, wr_mid = 0, cipher_start, nfrags; + struct adapter *adap = tx_info->adap; + unsigned int flits = 0, ndesc; + int credits, left, last_desc; + struct tx_sw_desc *sgl_sdesc; + struct cpl_tx_data *tx_data; + struct cpl_tx_sec_pdu *cpl; + struct ulptx_idata *idata; + struct ulp_txpkt *ulptx; + struct fw_ulptx_wr *wr; + __be64 iv_record; + void *pos; + u64 *end; + + nfrags = chcr_get_nfrags_to_send(skb, skb_offset, data_len); + /* get the number of flits required, it's a partial record so 2 flits + * (AES_BLOCK_SIZE) will be added. + */ + flits = chcr_ktls_get_tx_flits(nfrags, tx_info->key_ctx_len) + 2; + /* get the correct 8 byte IV of this record */ + iv_record = cpu_to_be64(tx_info->iv + tx_info->record_no); + /* If it's a middle record and not 16 byte aligned to run AES CTR, need + * to make it 16 byte aligned. So atleadt 2 extra flits of immediate + * data will be added. + */ + if (prior_data_len) + flits += 2; + /* number of descriptors */ + ndesc = chcr_flits_to_desc(flits); + /* check if enough credits available */ + credits = chcr_txq_avail(&q->q) - ndesc; + if (unlikely(credits < 0)) { + chcr_eth_txq_stop(q); + return NETDEV_TX_BUSY; + } + + if (unlikely(credits < ETHTXQ_STOP_THRES)) { + chcr_eth_txq_stop(q); + wr_mid |= FW_WR_EQUEQ_F | FW_WR_EQUIQ_F; + } + + last_desc = q->q.pidx + ndesc - 1; + if (last_desc >= q->q.size) + last_desc -= q->q.size; + sgl_sdesc = &q->q.sdesc[last_desc]; + + if (unlikely(cxgb4_map_skb(adap->pdev_dev, skb, sgl_sdesc->addr) < 0)) { + memset(sgl_sdesc->addr, 0, sizeof(sgl_sdesc->addr)); + q->mapping_err++; + return NETDEV_TX_BUSY; + } + + pos = &q->q.desc[q->q.pidx]; + end = (u64 *)pos + flits; + /* FW_ULPTX_WR */ + wr = pos; + /* WR will need len16 */ + len16 = DIV_ROUND_UP(flits, 2); + wr->op_to_compl = htonl(FW_WR_OP_V(FW_ULPTX_WR)); + wr->flowid_len16 = htonl(wr_mid | FW_WR_LEN16_V(len16)); + wr->cookie = 0; + pos += sizeof(*wr); + /* ULP_TXPKT */ + ulptx = pos; + ulptx->cmd_dest = htonl(ULPTX_CMD_V(ULP_TX_PKT) | + ULP_TXPKT_CHANNELID_V(tx_info->port_id) | + ULP_TXPKT_FID_V(q->q.cntxt_id) | + ULP_TXPKT_RO_F); + ulptx->len = htonl(len16 - 1); + /* ULPTX_IDATA sub-command */ + idata = (struct ulptx_idata *)(ulptx + 1); + idata->cmd_more = htonl(ULPTX_CMD_V(ULP_TX_SC_IMM) | ULP_TX_SC_MORE_F); + /* idata length will include cpl_tx_sec_pdu + key context size + + * cpl_tx_data header. + */ + idata->len = htonl(sizeof(*cpl) + tx_info->key_ctx_len + + sizeof(*tx_data) + AES_BLOCK_LEN + prior_data_len); + /* SEC CPL */ + cpl = (struct cpl_tx_sec_pdu *)(idata + 1); + /* cipher start will have tls header + iv size extra if its a header + * part of tls record. else only 16 byte IV will be added. + */ + cipher_start = + AES_BLOCK_LEN + 1 + + (!tls_rec_offset ? TLS_HEADER_SIZE + tx_info->iv_size : 0); + + cpl->op_ivinsrtofst = + htonl(CPL_TX_SEC_PDU_OPCODE_V(CPL_TX_SEC_PDU) | + CPL_TX_SEC_PDU_CPLLEN_V(CHCR_CPL_TX_SEC_PDU_LEN_64BIT) | + CPL_TX_SEC_PDU_IVINSRTOFST_V(1)); + cpl->pldlen = htonl(data_len + AES_BLOCK_LEN + prior_data_len); + cpl->aadstart_cipherstop_hi = + htonl(CPL_TX_SEC_PDU_CIPHERSTART_V(cipher_start)); + cpl->cipherstop_lo_authinsert = 0; + /* These two flits are actually a CPL_TLS_TX_SCMD_FMT. */ + cpl->seqno_numivs = htonl(tx_info->scmd0_short_seqno_numivs); + cpl->ivgen_hdrlen = htonl(tx_info->scmd0_short_ivgen_hdrlen); + cpl->scmd1 = 0; + + pos = cpl + 1; + /* check if space left to fill the keys */ + left = (void *)q->q.stat - pos; + if (!left) { + left = (void *)end - (void *)q->q.stat; + pos = q->q.desc; + end = pos + left; + } + + pos = chcr_copy_to_txd(&tx_info->key_ctx, &q->q, pos, + tx_info->key_ctx_len); + left = (void *)q->q.stat - pos; + + if (!left) { + left = (void *)end - (void *)q->q.stat; + pos = q->q.desc; + end = pos + left; + } + /* CPL_TX_DATA */ + tx_data = (void *)pos; + OPCODE_TID(tx_data) = htonl(MK_OPCODE_TID(CPL_TX_DATA, tx_info->tid)); + tx_data->len = htonl(TX_DATA_MSS_V(mss) | + TX_LENGTH_V(data_len + prior_data_len)); + tx_data->rsvd = htonl(tcp_seq); + tx_data->flags = htonl(TX_BYPASS_F); + if (tcp_push) + tx_data->flags |= htonl(TX_PUSH_F | TX_SHOVE_F); + + /* check left again, it might go beyond queue limit */ + pos = tx_data + 1; + left = (void *)q->q.stat - pos; + + /* check the position again */ + if (!left) { + left = (void *)end - (void *)q->q.stat; + pos = q->q.desc; + end = pos + left; + } + /* copy the 16 byte IV for AES-CTR, which includes 4 bytes of salt, 8 + * bytes of actual IV and 4 bytes of 16 byte-sequence. + */ + memcpy(pos, tx_info->key_ctx.salt, tx_info->salt_size); + memcpy(pos + tx_info->salt_size, &iv_record, tx_info->iv_size); + *(__be32 *)(pos + tx_info->salt_size + tx_info->iv_size) = + htonl(2 + (tls_rec_offset ? ((tls_rec_offset - + (TLS_HEADER_SIZE + tx_info->iv_size)) / AES_BLOCK_LEN) : 0)); + + pos += 16; + /* Prior_data_len will always be less than 16 bytes, fill the + * prio_data_len after AES_CTRL_BLOCK and clear the remaining length + * to 0. + */ + if (prior_data_len) + pos = chcr_copy_to_txd(prior_data, &q->q, pos, 16); + /* send the complete packet except the header */ + cxgb4_write_partial_sgl(skb, &q->q, pos, end, sgl_sdesc->addr, + skb_offset, data_len); + sgl_sdesc->skb = skb; + + chcr_txq_advance(&q->q, ndesc); + cxgb4_ring_tx_db(adap, &q->q, ndesc); + + return 0; +} + +/* + * chcr_ktls_tx_plaintxt: This handler will take care of the records which has + * only plain text (only tls header and iv) + * @tx_info - driver specific tls info. + * @skb - skb contains partial record.. + * @tcp_seq + * @mss - segment size. + * @tcp_push - tcp push bit. + * @q - TX queue. + * @port_id : port number + * @perior_data - data before the current segment, required to make this record + * 16 byte aligned. + * @prior_data_len - prior_data length (less than 16) + * return: NETDEV_TX_BUSY/NET_TX_OK. + */ +static int chcr_ktls_tx_plaintxt(struct chcr_ktls_info *tx_info, + struct sk_buff *skb, u32 tcp_seq, u32 mss, + bool tcp_push, struct sge_eth_txq *q, + u32 port_id, u8 *prior_data, + u32 data_len, u32 skb_offset, + u32 prior_data_len) +{ + int credits, left, len16, last_desc; + unsigned int flits = 0, ndesc; + struct tx_sw_desc *sgl_sdesc; + struct cpl_tx_data *tx_data; + struct ulptx_idata *idata; + struct ulp_txpkt *ulptx; + struct fw_ulptx_wr *wr; + u32 wr_mid = 0, nfrags; + void *pos; + u64 *end; + + flits = DIV_ROUND_UP(CHCR_PLAIN_TX_DATA_LEN, 8); + nfrags = chcr_get_nfrags_to_send(skb, skb_offset, data_len); + flits += chcr_sgl_len(nfrags); + if (prior_data_len) + flits += 2; + + /* WR will need len16 */ + len16 = DIV_ROUND_UP(flits, 2); + /* check how many descriptors needed */ + ndesc = DIV_ROUND_UP(flits, 8); + + credits = chcr_txq_avail(&q->q) - ndesc; + if (unlikely(credits < 0)) { + chcr_eth_txq_stop(q); + return NETDEV_TX_BUSY; + } + + if (unlikely(credits < ETHTXQ_STOP_THRES)) { + chcr_eth_txq_stop(q); + wr_mid |= FW_WR_EQUEQ_F | FW_WR_EQUIQ_F; + } + + last_desc = q->q.pidx + ndesc - 1; + if (last_desc >= q->q.size) + last_desc -= q->q.size; + sgl_sdesc = &q->q.sdesc[last_desc]; + + if (unlikely(cxgb4_map_skb(tx_info->adap->pdev_dev, skb, + sgl_sdesc->addr) < 0)) { + memset(sgl_sdesc->addr, 0, sizeof(sgl_sdesc->addr)); + q->mapping_err++; + return NETDEV_TX_BUSY; + } + + pos = &q->q.desc[q->q.pidx]; + end = (u64 *)pos + flits; + /* FW_ULPTX_WR */ + wr = pos; + wr->op_to_compl = htonl(FW_WR_OP_V(FW_ULPTX_WR)); + wr->flowid_len16 = htonl(wr_mid | FW_WR_LEN16_V(len16)); + wr->cookie = 0; + /* ULP_TXPKT */ + ulptx = (struct ulp_txpkt *)(wr + 1); + ulptx->cmd_dest = htonl(ULPTX_CMD_V(ULP_TX_PKT) | + ULP_TXPKT_DATAMODIFY_V(0) | + ULP_TXPKT_CHANNELID_V(tx_info->port_id) | + ULP_TXPKT_DEST_V(0) | + ULP_TXPKT_FID_V(q->q.cntxt_id) | ULP_TXPKT_RO_V(1)); + ulptx->len = htonl(len16 - 1); + /* ULPTX_IDATA sub-command */ + idata = (struct ulptx_idata *)(ulptx + 1); + idata->cmd_more = htonl(ULPTX_CMD_V(ULP_TX_SC_IMM) | ULP_TX_SC_MORE_F); + idata->len = htonl(sizeof(*tx_data) + prior_data_len); + /* CPL_TX_DATA */ + tx_data = (struct cpl_tx_data *)(idata + 1); + OPCODE_TID(tx_data) = htonl(MK_OPCODE_TID(CPL_TX_DATA, tx_info->tid)); + tx_data->len = htonl(TX_DATA_MSS_V(mss) | + TX_LENGTH_V(data_len + prior_data_len)); + /* set tcp seq number */ + tx_data->rsvd = htonl(tcp_seq); + tx_data->flags = htonl(TX_BYPASS_F); + if (tcp_push) + tx_data->flags |= htonl(TX_PUSH_F | TX_SHOVE_F); + + pos = tx_data + 1; + /* apart from prior_data_len, we should set remaining part of 16 bytes + * to be zero. + */ + if (prior_data_len) + pos = chcr_copy_to_txd(prior_data, &q->q, pos, 16); + + /* check left again, it might go beyond queue limit */ + left = (void *)q->q.stat - pos; + + /* check the position again */ + if (!left) { + left = (void *)end - (void *)q->q.stat; + pos = q->q.desc; + end = pos + left; + } + /* send the complete packet including the header */ + cxgb4_write_partial_sgl(skb, &q->q, pos, end, sgl_sdesc->addr, + skb_offset, data_len); + sgl_sdesc->skb = skb; + + chcr_txq_advance(&q->q, ndesc); + cxgb4_ring_tx_db(tx_info->adap, &q->q, ndesc); + return 0; +} + +static int chcr_ktls_tunnel_pkt(struct chcr_ktls_info *tx_info, + struct sk_buff *skb, + struct sge_eth_txq *q) +{ + u32 ctrl, iplen, maclen, wr_mid = 0, len16; + struct tx_sw_desc *sgl_sdesc; + struct fw_eth_tx_pkt_wr *wr; + struct cpl_tx_pkt_core *cpl; + unsigned int flits, ndesc; + int credits, last_desc; + u64 cntrl1, *end; + void *pos; + + ctrl = sizeof(*cpl); + flits = DIV_ROUND_UP(sizeof(*wr) + ctrl, 8); + + flits += chcr_sgl_len(skb_shinfo(skb)->nr_frags + 1); + len16 = DIV_ROUND_UP(flits, 2); + /* check how many descriptors needed */ + ndesc = DIV_ROUND_UP(flits, 8); + + credits = chcr_txq_avail(&q->q) - ndesc; + if (unlikely(credits < 0)) { + chcr_eth_txq_stop(q); + return -ENOMEM; + } + + if (unlikely(credits < ETHTXQ_STOP_THRES)) { + chcr_eth_txq_stop(q); + wr_mid |= FW_WR_EQUEQ_F | FW_WR_EQUIQ_F; + } + + last_desc = q->q.pidx + ndesc - 1; + if (last_desc >= q->q.size) + last_desc -= q->q.size; + sgl_sdesc = &q->q.sdesc[last_desc]; + + if (unlikely(cxgb4_map_skb(tx_info->adap->pdev_dev, skb, + sgl_sdesc->addr) < 0)) { + memset(sgl_sdesc->addr, 0, sizeof(sgl_sdesc->addr)); + q->mapping_err++; + return -ENOMEM; + } + + iplen = skb_network_header_len(skb); + maclen = skb_mac_header_len(skb); + + pos = &q->q.desc[q->q.pidx]; + end = (u64 *)pos + flits; + wr = pos; + + /* Firmware work request header */ + wr->op_immdlen = htonl(FW_WR_OP_V(FW_ETH_TX_PKT_WR) | + FW_WR_IMMDLEN_V(ctrl)); + + wr->equiq_to_len16 = htonl(wr_mid | FW_WR_LEN16_V(len16)); + wr->r3 = 0; + + cpl = (void *)(wr + 1); + + /* CPL header */ + cpl->ctrl0 = htonl(TXPKT_OPCODE_V(CPL_TX_PKT) | + TXPKT_INTF_V(tx_info->tx_chan) | + TXPKT_PF_V(tx_info->adap->pf)); + cpl->pack = 0; + cntrl1 = TXPKT_CSUM_TYPE_V(tx_info->ip_family == AF_INET ? + TX_CSUM_TCPIP : TX_CSUM_TCPIP6); + cntrl1 |= T6_TXPKT_ETHHDR_LEN_V(maclen - ETH_HLEN) | + TXPKT_IPHDR_LEN_V(iplen); + /* checksum offload */ + cpl->ctrl1 = cpu_to_be64(cntrl1); + cpl->len = htons(skb->len); + + pos = cpl + 1; + + cxgb4_write_sgl(skb, &q->q, pos, end, 0, sgl_sdesc->addr); + sgl_sdesc->skb = skb; + chcr_txq_advance(&q->q, ndesc); + cxgb4_ring_tx_db(tx_info->adap, &q->q, ndesc); + return 0; +} + +/* + * chcr_ktls_copy_record_in_skb + * @nskb - new skb where the frags to be added. + * @skb - old skb, to copy socket and destructor details. + * @record - specific record which has complete 16k record in frags. + */ +static void chcr_ktls_copy_record_in_skb(struct sk_buff *nskb, + struct sk_buff *skb, + struct tls_record_info *record) +{ + int i = 0; + + for (i = 0; i < record->num_frags; i++) { + skb_shinfo(nskb)->frags[i] = record->frags[i]; + /* increase the frag ref count */ + __skb_frag_ref(&skb_shinfo(nskb)->frags[i]); + } + + skb_shinfo(nskb)->nr_frags = record->num_frags; + nskb->data_len = record->len; + nskb->len += record->len; + nskb->truesize += record->len; + nskb->sk = skb->sk; + nskb->destructor = skb->destructor; + refcount_add(nskb->truesize, &nskb->sk->sk_wmem_alloc); +} + +/* + * chcr_end_part_handler: This handler will handle the record which + * is complete or if record's end part is received. T6 adapter has a issue that + * it can't send out TAG with partial record so if its an end part then we have + * to send TAG as well and for which we need to fetch the complete record and + * send it to crypto module. + * @tx_info - driver specific tls info. + * @skb - skb contains partial record. + * @record - complete record of 16K size. + * @tcp_seq + * @mss - segment size in which TP needs to chop a packet. + * @tcp_push_no_fin - tcp push if fin is not set. + * @q - TX queue. + * @tls_end_offset - offset from end of the record. + * @last wr : check if this is the last part of the skb going out. + * return: NETDEV_TX_OK/NETDEV_TX_BUSY. + */ +static int chcr_end_part_handler(struct chcr_ktls_info *tx_info, + struct sk_buff *skb, + struct tls_record_info *record, + u32 tcp_seq, int mss, bool tcp_push_no_fin, + struct sge_eth_txq *q, u32 skb_offset, + u32 tls_end_offset, bool last_wr) +{ + bool free_skb_if_tx_fails = false; + struct sk_buff *nskb = NULL; + + /* check if it is a complete record */ + if (tls_end_offset == record->len) { + nskb = skb; + atomic64_inc(&tx_info->adap->ch_ktls_stats.ktls_tx_complete_pkts); + } else { + nskb = alloc_skb(0, GFP_ATOMIC); + if (!nskb) { + dev_kfree_skb_any(skb); + return NETDEV_TX_BUSY; + } + + /* copy complete record in skb */ + chcr_ktls_copy_record_in_skb(nskb, skb, record); + /* packet is being sent from the beginning, update the tcp_seq + * accordingly. + */ + tcp_seq = tls_record_start_seq(record); + /* reset skb offset */ + skb_offset = 0; + + if (last_wr) + dev_kfree_skb_any(skb); + else + free_skb_if_tx_fails = true; + + last_wr = true; + + atomic64_inc(&tx_info->adap->ch_ktls_stats.ktls_tx_end_pkts); + } + + if (chcr_ktls_xmit_wr_complete(nskb, tx_info, q, tcp_seq, + last_wr, record->len, skb_offset, + record->num_frags, + (last_wr && tcp_push_no_fin), + mss)) { + if (free_skb_if_tx_fails) + dev_kfree_skb_any(skb); + goto out; + } + tx_info->prev_seq = record->end_seq; + return 0; +out: + dev_kfree_skb_any(nskb); + return NETDEV_TX_BUSY; +} + +/* + * chcr_short_record_handler: This handler will take care of the records which + * doesn't have end part (1st part or the middle part(/s) of a record). In such + * cases, AES CTR will be used in place of AES GCM to send out partial packet. + * This partial record might be the first part of the record, or the middle + * part. In case of middle record we should fetch the prior data to make it 16 + * byte aligned. If it has a partial tls header or iv then get to the start of + * tls header. And if it has partial TAG, then remove the complete TAG and send + * only the payload. + * There is one more possibility that it gets a partial header, send that + * portion as a plaintext. + * @tx_info - driver specific tls info. + * @skb - skb contains partial record.. + * @record - complete record of 16K size. + * @tcp_seq + * @mss - segment size in which TP needs to chop a packet. + * @tcp_push_no_fin - tcp push if fin is not set. + * @q - TX queue. + * @tls_end_offset - offset from end of the record. + * return: NETDEV_TX_OK/NETDEV_TX_BUSY. + */ +static int chcr_short_record_handler(struct chcr_ktls_info *tx_info, + struct sk_buff *skb, + struct tls_record_info *record, + u32 tcp_seq, int mss, bool tcp_push_no_fin, + u32 data_len, u32 skb_offset, + struct sge_eth_txq *q, u32 tls_end_offset) +{ + u32 tls_rec_offset = tcp_seq - tls_record_start_seq(record); + u8 prior_data[16] = {0}; + u32 prior_data_len = 0; + + /* check if the skb is ending in middle of tag/HASH, its a big + * trouble, send the packet before the HASH. + */ + int remaining_record = tls_end_offset - data_len; + + if (remaining_record > 0 && + remaining_record < TLS_CIPHER_AES_GCM_128_TAG_SIZE) { + int trimmed_len = 0; + + if (tls_end_offset > TLS_CIPHER_AES_GCM_128_TAG_SIZE) + trimmed_len = data_len - + (TLS_CIPHER_AES_GCM_128_TAG_SIZE - + remaining_record); + if (!trimmed_len) + return FALLBACK; + + WARN_ON(trimmed_len > data_len); + + data_len = trimmed_len; + atomic64_inc(&tx_info->adap->ch_ktls_stats.ktls_tx_trimmed_pkts); + } + + /* check if it is only the header part. */ + if (tls_rec_offset + data_len <= (TLS_HEADER_SIZE + tx_info->iv_size)) { + if (chcr_ktls_tx_plaintxt(tx_info, skb, tcp_seq, mss, + tcp_push_no_fin, q, + tx_info->port_id, prior_data, + data_len, skb_offset, prior_data_len)) + goto out; + + tx_info->prev_seq = tcp_seq + data_len; + return 0; + } + + /* check if the middle record's start point is 16 byte aligned. CTR + * needs 16 byte aligned start point to start encryption. + */ + if (tls_rec_offset) { + /* there is an offset from start, means its a middle record */ + int remaining = 0; + + if (tls_rec_offset < (TLS_HEADER_SIZE + tx_info->iv_size)) { + prior_data_len = tls_rec_offset; + tls_rec_offset = 0; + remaining = 0; + } else { + prior_data_len = + (tls_rec_offset - + (TLS_HEADER_SIZE + tx_info->iv_size)) + % AES_BLOCK_LEN; + remaining = tls_rec_offset - prior_data_len; + } + + /* if prior_data_len is not zero, means we need to fetch prior + * data to make this record 16 byte aligned, or we need to reach + * to start offset. + */ + if (prior_data_len) { + int i = 0; + skb_frag_t *f; + int frag_size = 0, frag_delta = 0; + + while (remaining > 0) { + frag_size = skb_frag_size(&record->frags[i]); + if (remaining < frag_size) + break; + + remaining -= frag_size; + i++; + } + f = &record->frags[i]; + frag_delta = skb_frag_size(f) - remaining; + + if (frag_delta >= prior_data_len) { + memcpy_from_page(prior_data, skb_frag_page(f), + skb_frag_off(f) + remaining, + prior_data_len); + } else { + memcpy_from_page(prior_data, skb_frag_page(f), + skb_frag_off(f) + remaining, + frag_delta); + + /* get the next page */ + f = &record->frags[i + 1]; + + memcpy_from_page(prior_data + frag_delta, + skb_frag_page(f), + skb_frag_off(f), + prior_data_len - frag_delta); + } + /* reset tcp_seq as per the prior_data_required len */ + tcp_seq -= prior_data_len; + } + atomic64_inc(&tx_info->adap->ch_ktls_stats.ktls_tx_middle_pkts); + } else { + atomic64_inc(&tx_info->adap->ch_ktls_stats.ktls_tx_start_pkts); + } + + if (chcr_ktls_xmit_wr_short(skb, tx_info, q, tcp_seq, tcp_push_no_fin, + mss, tls_rec_offset, prior_data, + prior_data_len, data_len, skb_offset)) { + goto out; + } + + tx_info->prev_seq = tcp_seq + data_len + prior_data_len; + return 0; +out: + dev_kfree_skb_any(skb); + return NETDEV_TX_BUSY; +} + +static int chcr_ktls_sw_fallback(struct sk_buff *skb, + struct chcr_ktls_info *tx_info, + struct sge_eth_txq *q) +{ + u32 data_len, skb_offset; + struct sk_buff *nskb; + struct tcphdr *th; + + nskb = tls_encrypt_skb(skb); + + if (!nskb) + return 0; + + th = tcp_hdr(nskb); + skb_offset = skb_tcp_all_headers(nskb); + data_len = nskb->len - skb_offset; + skb_tx_timestamp(nskb); + + if (chcr_ktls_tunnel_pkt(tx_info, nskb, q)) + goto out; + + tx_info->prev_seq = ntohl(th->seq) + data_len; + atomic64_inc(&tx_info->adap->ch_ktls_stats.ktls_tx_fallback); + return 0; +out: + dev_kfree_skb_any(nskb); + return 0; +} +/* nic tls TX handler */ +static int chcr_ktls_xmit(struct sk_buff *skb, struct net_device *dev) +{ + u32 tls_end_offset, tcp_seq, skb_data_len, skb_offset; + struct ch_ktls_port_stats_debug *port_stats; + struct chcr_ktls_ofld_ctx_tx *tx_ctx; + struct ch_ktls_stats_debug *stats; + struct tcphdr *th = tcp_hdr(skb); + int data_len, qidx, ret = 0, mss; + struct tls_record_info *record; + struct chcr_ktls_info *tx_info; + struct net_device *tls_netdev; + struct tls_context *tls_ctx; + struct sge_eth_txq *q; + struct adapter *adap; + unsigned long flags; + + tcp_seq = ntohl(th->seq); + skb_offset = skb_tcp_all_headers(skb); + skb_data_len = skb->len - skb_offset; + data_len = skb_data_len; + + mss = skb_is_gso(skb) ? skb_shinfo(skb)->gso_size : data_len; + + tls_ctx = tls_get_ctx(skb->sk); + tls_netdev = rcu_dereference_bh(tls_ctx->netdev); + /* Don't quit on NULL: if tls_device_down is running in parallel, + * netdev might become NULL, even if tls_is_skb_tx_device_offloaded was + * true. Rather continue processing this packet. + */ + if (unlikely(tls_netdev && tls_netdev != dev)) + goto out; + + tx_ctx = chcr_get_ktls_tx_context(tls_ctx); + tx_info = tx_ctx->chcr_info; + + if (unlikely(!tx_info)) + goto out; + + adap = tx_info->adap; + stats = &adap->ch_ktls_stats; + port_stats = &stats->ktls_port[tx_info->port_id]; + + qidx = skb->queue_mapping; + q = &adap->sge.ethtxq[qidx + tx_info->first_qset]; + cxgb4_reclaim_completed_tx(adap, &q->q, true); + /* if tcp options are set but finish is not send the options first */ + if (!th->fin && chcr_ktls_check_tcp_options(th)) { + ret = chcr_ktls_write_tcp_options(tx_info, skb, q, + tx_info->tx_chan); + if (ret) + return NETDEV_TX_BUSY; + } + + /* TCP segments can be in received either complete or partial. + * chcr_end_part_handler will handle cases if complete record or end + * part of the record is received. In case of partial end part of record, + * we will send the complete record again. + */ + + spin_lock_irqsave(&tx_ctx->base.lock, flags); + + do { + + cxgb4_reclaim_completed_tx(adap, &q->q, true); + /* fetch the tls record */ + record = tls_get_record(&tx_ctx->base, tcp_seq, + &tx_info->record_no); + /* By the time packet reached to us, ACK is received, and record + * won't be found in that case, handle it gracefully. + */ + if (unlikely(!record)) { + spin_unlock_irqrestore(&tx_ctx->base.lock, flags); + atomic64_inc(&port_stats->ktls_tx_drop_no_sync_data); + goto out; + } + + tls_end_offset = record->end_seq - tcp_seq; + + pr_debug("seq 0x%x, end_seq 0x%x prev_seq 0x%x, datalen 0x%x\n", + tcp_seq, record->end_seq, tx_info->prev_seq, data_len); + /* update tcb for the skb */ + if (skb_data_len == data_len) { + u32 tx_max = tcp_seq; + + if (!tls_record_is_start_marker(record) && + tls_end_offset < TLS_CIPHER_AES_GCM_128_TAG_SIZE) + tx_max = record->end_seq - + TLS_CIPHER_AES_GCM_128_TAG_SIZE; + + ret = chcr_ktls_xmit_tcb_cpls(tx_info, q, tx_max, + ntohl(th->ack_seq), + ntohs(th->window), + tls_end_offset != + record->len); + if (ret) { + spin_unlock_irqrestore(&tx_ctx->base.lock, + flags); + goto out; + } + + if (th->fin) + skb_get(skb); + } + + if (unlikely(tls_record_is_start_marker(record))) { + atomic64_inc(&port_stats->ktls_tx_skip_no_sync_data); + /* If tls_end_offset < data_len, means there is some + * data after start marker, which needs encryption, send + * plaintext first and take skb refcount. else send out + * complete pkt as plaintext. + */ + if (tls_end_offset < data_len) + skb_get(skb); + else + tls_end_offset = data_len; + + ret = chcr_ktls_tx_plaintxt(tx_info, skb, tcp_seq, mss, + (!th->fin && th->psh), q, + tx_info->port_id, NULL, + tls_end_offset, skb_offset, + 0); + + if (ret) { + /* free the refcount taken earlier */ + if (tls_end_offset < data_len) + dev_kfree_skb_any(skb); + spin_unlock_irqrestore(&tx_ctx->base.lock, flags); + goto out; + } + + data_len -= tls_end_offset; + tcp_seq = record->end_seq; + skb_offset += tls_end_offset; + continue; + } + + /* if a tls record is finishing in this SKB */ + if (tls_end_offset <= data_len) { + ret = chcr_end_part_handler(tx_info, skb, record, + tcp_seq, mss, + (!th->fin && th->psh), q, + skb_offset, + tls_end_offset, + skb_offset + + tls_end_offset == skb->len); + + data_len -= tls_end_offset; + /* tcp_seq increment is required to handle next record. + */ + tcp_seq += tls_end_offset; + skb_offset += tls_end_offset; + } else { + ret = chcr_short_record_handler(tx_info, skb, + record, tcp_seq, mss, + (!th->fin && th->psh), + data_len, skb_offset, + q, tls_end_offset); + data_len = 0; + } + + /* if any failure, come out from the loop. */ + if (ret) { + spin_unlock_irqrestore(&tx_ctx->base.lock, flags); + if (th->fin) + dev_kfree_skb_any(skb); + + if (ret == FALLBACK) + return chcr_ktls_sw_fallback(skb, tx_info, q); + + return NETDEV_TX_OK; + } + + /* length should never be less than 0 */ + WARN_ON(data_len < 0); + + } while (data_len > 0); + + spin_unlock_irqrestore(&tx_ctx->base.lock, flags); + atomic64_inc(&port_stats->ktls_tx_encrypted_packets); + atomic64_add(skb_data_len, &port_stats->ktls_tx_encrypted_bytes); + + /* tcp finish is set, send a separate tcp msg including all the options + * as well. + */ + if (th->fin) { + chcr_ktls_write_tcp_options(tx_info, skb, q, tx_info->tx_chan); + dev_kfree_skb_any(skb); + } + + return NETDEV_TX_OK; +out: + dev_kfree_skb_any(skb); + return NETDEV_TX_OK; +} + +static void *chcr_ktls_uld_add(const struct cxgb4_lld_info *lldi) +{ + struct chcr_ktls_uld_ctx *u_ctx; + + pr_info_once("%s - version %s\n", CHCR_KTLS_DRV_DESC, + CHCR_KTLS_DRV_VERSION); + u_ctx = kzalloc(sizeof(*u_ctx), GFP_KERNEL); + if (!u_ctx) { + u_ctx = ERR_PTR(-ENOMEM); + goto out; + } + u_ctx->lldi = *lldi; + u_ctx->detach = false; + xa_init_flags(&u_ctx->tid_list, XA_FLAGS_LOCK_BH); +out: + return u_ctx; +} + +static const struct tlsdev_ops chcr_ktls_ops = { + .tls_dev_add = chcr_ktls_dev_add, + .tls_dev_del = chcr_ktls_dev_del, +}; + +static chcr_handler_func work_handlers[NUM_CPL_CMDS] = { + [CPL_ACT_OPEN_RPL] = chcr_ktls_cpl_act_open_rpl, + [CPL_SET_TCB_RPL] = chcr_ktls_cpl_set_tcb_rpl, +}; + +static int chcr_ktls_uld_rx_handler(void *handle, const __be64 *rsp, + const struct pkt_gl *pgl) +{ + const struct cpl_act_open_rpl *rpl = (struct cpl_act_open_rpl *)rsp; + struct chcr_ktls_uld_ctx *u_ctx = handle; + u8 opcode = rpl->ot.opcode; + struct adapter *adap; + + adap = pci_get_drvdata(u_ctx->lldi.pdev); + + if (!work_handlers[opcode]) { + pr_err("Unsupported opcode %d received\n", opcode); + return 0; + } + + work_handlers[opcode](adap, (unsigned char *)&rsp[1]); + return 0; +} + +static void clear_conn_resources(struct chcr_ktls_info *tx_info) +{ + /* clear l2t entry */ + if (tx_info->l2te) + cxgb4_l2t_release(tx_info->l2te); + +#if IS_ENABLED(CONFIG_IPV6) + /* clear clip entry */ + if (tx_info->ip_family == AF_INET6) + cxgb4_clip_release(tx_info->netdev, (const u32 *) + &tx_info->sk->sk_v6_rcv_saddr, + 1); +#endif + + /* clear tid */ + if (tx_info->tid != -1) + cxgb4_remove_tid(&tx_info->adap->tids, tx_info->tx_chan, + tx_info->tid, tx_info->ip_family); +} + +static void ch_ktls_reset_all_conn(struct chcr_ktls_uld_ctx *u_ctx) +{ + struct ch_ktls_port_stats_debug *port_stats; + struct chcr_ktls_ofld_ctx_tx *tx_ctx; + struct chcr_ktls_info *tx_info; + unsigned long index; + + xa_for_each(&u_ctx->tid_list, index, tx_ctx) { + tx_info = tx_ctx->chcr_info; + clear_conn_resources(tx_info); + port_stats = &tx_info->adap->ch_ktls_stats.ktls_port[tx_info->port_id]; + atomic64_inc(&port_stats->ktls_tx_connection_close); + kvfree(tx_info); + tx_ctx->chcr_info = NULL; + /* release module refcount */ + module_put(THIS_MODULE); + } +} + +static int chcr_ktls_uld_state_change(void *handle, enum cxgb4_state new_state) +{ + struct chcr_ktls_uld_ctx *u_ctx = handle; + + switch (new_state) { + case CXGB4_STATE_UP: + pr_info("%s: Up\n", pci_name(u_ctx->lldi.pdev)); + mutex_lock(&dev_mutex); + list_add_tail(&u_ctx->entry, &uld_ctx_list); + mutex_unlock(&dev_mutex); + break; + case CXGB4_STATE_START_RECOVERY: + case CXGB4_STATE_DOWN: + case CXGB4_STATE_DETACH: + pr_info("%s: Down\n", pci_name(u_ctx->lldi.pdev)); + mutex_lock(&dev_mutex); + u_ctx->detach = true; + list_del(&u_ctx->entry); + ch_ktls_reset_all_conn(u_ctx); + xa_destroy(&u_ctx->tid_list); + mutex_unlock(&dev_mutex); + break; + default: + break; + } + + return 0; +} + +static struct cxgb4_uld_info chcr_ktls_uld_info = { + .name = CHCR_KTLS_DRV_MODULE_NAME, + .nrxq = 1, + .rxq_size = 1024, + .add = chcr_ktls_uld_add, + .tx_handler = chcr_ktls_xmit, + .rx_handler = chcr_ktls_uld_rx_handler, + .state_change = chcr_ktls_uld_state_change, + .tlsdev_ops = &chcr_ktls_ops, +}; + +static int __init chcr_ktls_init(void) +{ + cxgb4_register_uld(CXGB4_ULD_KTLS, &chcr_ktls_uld_info); + return 0; +} + +static void __exit chcr_ktls_exit(void) +{ + struct chcr_ktls_uld_ctx *u_ctx, *tmp; + struct adapter *adap; + + pr_info("driver unloaded\n"); + + mutex_lock(&dev_mutex); + list_for_each_entry_safe(u_ctx, tmp, &uld_ctx_list, entry) { + adap = pci_get_drvdata(u_ctx->lldi.pdev); + memset(&adap->ch_ktls_stats, 0, sizeof(adap->ch_ktls_stats)); + list_del(&u_ctx->entry); + xa_destroy(&u_ctx->tid_list); + kfree(u_ctx); + } + mutex_unlock(&dev_mutex); + cxgb4_unregister_uld(CXGB4_ULD_KTLS); +} + +module_init(chcr_ktls_init); +module_exit(chcr_ktls_exit); + +MODULE_DESCRIPTION("Chelsio NIC TLS ULD driver"); +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Chelsio Communications"); +MODULE_VERSION(CHCR_KTLS_DRV_VERSION); |