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chcr_ktls.c
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chcr_ktls.c
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// 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 "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);
start = 0;
} 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_cipher *cipher;
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
*/
cipher = crypto_alloc_cipher("aes", 0, 0);
if (IS_ERR(cipher)) {
ret = -ENOMEM;
goto out;
}
ret = crypto_cipher_setkey(cipher, key, keylen);
if (ret)
goto out1;
memset(ghash_h, 0, ghash_size);
crypto_cipher_encrypt_one(cipher, ghash_h, ghash_h);
/* 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 out1;
}
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;
out1:
crypto_free_cipher(cipher);
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 (!sk->sk_ipv6only &&
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) {
pos = 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 availbale
* 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)
{