// 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 <linux/skbuff_ref.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_info *tx_info = chcr_get_ktls_tx_info(tls_ctx);
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);
chcr_set_ktls_tx_info(tls_ctx, 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_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;
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 (chcr_get_ktls_tx_info(tls_ctx))
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);
chcr_set_ktls_tx_info(tls_ctx, 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 tls_offload_context_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 = tls_offload_ctx_tx(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 tls_offload_context_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);
tx_ctx = tls_offload_ctx_tx(tls_ctx);
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_info = chcr_get_ktls_tx_info(tls_ctx);
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->lock, flags);
do {
cxgb4_reclaim_completed_tx(adap, &q->q, true);
/* fetch the tls record */
record = tls_get_record(tx_ctx, 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->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->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->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->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->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 tls_offload_context_tx *tx_ctx;
struct chcr_ktls_info *tx_info;
unsigned long index;
xa_for_each(&u_ctx->tid_list, index, tx_ctx) {
tx_info = __chcr_get_ktls_tx_info(tx_ctx);
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);
memset(tx_ctx->driver_state, 0, TLS_DRIVER_STATE_SIZE_TX);
/* 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);
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