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sys/dev/cxgbe/crypto/t4_kern_tls.c

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/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2018-2019 Chelsio Communications, Inc.
* All rights reserved.
* Written by: John Baldwin <jhb@FreeBSD.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include "opt_inet.h"
#include "opt_inet6.h"
#include "opt_kern_tls.h"
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/ktr.h>
#include <sys/ktls.h>
#include <sys/sglist.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/sockbuf.h>
#include <netinet/in.h>
#include <netinet/in_pcb.h>
#include <netinet/ip.h>
#include <netinet/ip6.h>
#include <netinet/tcp_var.h>
#include <opencrypto/cryptodev.h>
#include <opencrypto/xform.h>
#include "common/common.h"
#include "common/t4_regs.h"
#include "common/t4_regs_values.h"
#include "common/t4_tcb.h"
#include "t4_l2t.h"
#include "t4_clip.h"
#include "t4_mp_ring.h"
#include "crypto/t4_crypto.h"
#if defined(INET) || defined(INET6)
#define SALT_SIZE 4
#define GCM_TAG_SIZE 16
#define TLS_HEADER_LENGTH 5
#define TLS_KEY_CONTEXT_SZ roundup2(sizeof(struct tls_keyctx), 32)
struct tls_scmd {
__be32 seqno_numivs;
__be32 ivgen_hdrlen;
};
struct tls_key_req {
/* FW_ULPTX_WR */
__be32 wr_hi;
__be32 wr_mid;
__be32 ftid;
__u8 reneg_to_write_rx;
__u8 protocol;
__be16 mfs;
/* master command */
__be32 cmd;
__be32 len16; /* command length */
__be32 dlen; /* data length in 32-byte units */
__be32 kaddr;
/* sub-command */
__be32 sc_more;
__be32 sc_len;
}__packed;
struct tls_keyctx {
struct tx_keyctx_hdr {
__u8 ctxlen;
__u8 r2;
__be16 dualck_to_txvalid;
__u8 txsalt[4];
__be64 r5;
} txhdr;
struct keys {
__u8 edkey[32];
__u8 ipad[64];
__u8 opad[64];
} keys;
};
#define S_TLS_KEYCTX_TX_WR_TXOPAD_PRESENT 11
#define M_TLS_KEYCTX_TX_WR_TXOPAD_PRESENT 0x1
#define V_TLS_KEYCTX_TX_WR_TXOPAD_PRESENT(x) \
((x) << S_TLS_KEYCTX_TX_WR_TXOPAD_PRESENT)
#define G_TLS_KEYCTX_TX_WR_TXOPAD_PRESENT(x) \
(((x) >> S_TLS_KEYCTX_TX_WR_TXOPAD_PRESENT) & \
M_TLS_KEYCTX_TX_WR_TXOPAD_PRESENT)
#define F_TLS_KEYCTX_TX_WR_TXOPAD_PRESENT \
V_TLS_KEYCTX_TX_WR_TXOPAD_PRESENT(1U)
#define S_TLS_KEYCTX_TX_WR_SALT_PRESENT 10
#define M_TLS_KEYCTX_TX_WR_SALT_PRESENT 0x1
#define V_TLS_KEYCTX_TX_WR_SALT_PRESENT(x) \
((x) << S_TLS_KEYCTX_TX_WR_SALT_PRESENT)
#define G_TLS_KEYCTX_TX_WR_SALT_PRESENT(x) \
(((x) >> S_TLS_KEYCTX_TX_WR_SALT_PRESENT) & \
M_TLS_KEYCTX_TX_WR_SALT_PRESENT)
#define F_TLS_KEYCTX_TX_WR_SALT_PRESENT \
V_TLS_KEYCTX_TX_WR_SALT_PRESENT(1U)
#define S_TLS_KEYCTX_TX_WR_TXCK_SIZE 6
#define M_TLS_KEYCTX_TX_WR_TXCK_SIZE 0xf
#define V_TLS_KEYCTX_TX_WR_TXCK_SIZE(x) \
((x) << S_TLS_KEYCTX_TX_WR_TXCK_SIZE)
#define G_TLS_KEYCTX_TX_WR_TXCK_SIZE(x) \
(((x) >> S_TLS_KEYCTX_TX_WR_TXCK_SIZE) & \
M_TLS_KEYCTX_TX_WR_TXCK_SIZE)
#define S_TLS_KEYCTX_TX_WR_TXMK_SIZE 2
#define M_TLS_KEYCTX_TX_WR_TXMK_SIZE 0xf
#define V_TLS_KEYCTX_TX_WR_TXMK_SIZE(x) \
((x) << S_TLS_KEYCTX_TX_WR_TXMK_SIZE)
#define G_TLS_KEYCTX_TX_WR_TXMK_SIZE(x) \
(((x) >> S_TLS_KEYCTX_TX_WR_TXMK_SIZE) & \
M_TLS_KEYCTX_TX_WR_TXMK_SIZE)
#define S_TLS_KEYCTX_TX_WR_TXVALID 0
#define M_TLS_KEYCTX_TX_WR_TXVALID 0x1
#define V_TLS_KEYCTX_TX_WR_TXVALID(x) \
((x) << S_TLS_KEYCTX_TX_WR_TXVALID)
#define G_TLS_KEYCTX_TX_WR_TXVALID(x) \
(((x) >> S_TLS_KEYCTX_TX_WR_TXVALID) & M_TLS_KEYCTX_TX_WR_TXVALID)
#define F_TLS_KEYCTX_TX_WR_TXVALID V_TLS_KEYCTX_TX_WR_TXVALID(1U)
/* Key Context Programming Operation type */
#define KEY_WRITE_RX 0x1
#define KEY_WRITE_TX 0x2
#define KEY_DELETE_RX 0x4
#define KEY_DELETE_TX 0x8
struct tlspcb {
struct cxgbe_snd_tag com;
struct vi_info *vi; /* virtual interface */
struct adapter *sc;
struct l2t_entry *l2te; /* L2 table entry used by this connection */
int tid; /* Connection identifier */
int tx_key_addr;
bool inline_key;
bool using_timestamps;
unsigned char enc_mode;
struct tls_scmd scmd0;
struct tls_scmd scmd0_short;
unsigned int tx_key_info_size;
uint32_t prev_seq;
uint32_t prev_ack;
uint32_t prev_tsecr;
uint16_t prev_win;
uint16_t prev_mss;
/* Only used outside of setup and teardown when using inline keys. */
struct tls_keyctx keyctx;
/* Fields only used during setup and teardown. */
struct inpcb *inp; /* backpointer to host stack's PCB */
struct sge_txq *txq;
struct sge_wrq *ctrlq;
struct clip_entry *ce; /* CLIP table entry used by this tid */
unsigned char auth_mode;
unsigned char hmac_ctrl;
unsigned char mac_first;
unsigned char iv_size;
unsigned int frag_size;
unsigned int cipher_secret_size;
int proto_ver;
bool open_pending;
};
static int ktls_setup_keys(struct tlspcb *tlsp,
const struct ktls_session *tls, struct sge_txq *txq);
static inline struct tlspcb *
mst_to_tls(struct m_snd_tag *t)
{
return ((struct tlspcb *)mst_to_cst(t));
}
/* XXX: There are similar versions of these two in tom/t4_tls.c. */
static int
get_new_keyid(struct tlspcb *tlsp)
{
vmem_addr_t addr;
if (vmem_alloc(tlsp->sc->key_map, TLS_KEY_CONTEXT_SZ,
M_NOWAIT | M_FIRSTFIT, &addr) != 0)
return (-1);
return (addr);
}
static void
free_keyid(struct tlspcb *tlsp, int keyid)
{
CTR3(KTR_CXGBE, "%s: tid %d key addr %#x", __func__, tlsp->tid, keyid);
vmem_free(tlsp->sc->key_map, keyid, TLS_KEY_CONTEXT_SZ);
}
static struct tlspcb *
alloc_tlspcb(struct ifnet *ifp, struct vi_info *vi, int flags)
{
struct port_info *pi = vi->pi;
struct adapter *sc = pi->adapter;
struct tlspcb *tlsp;
tlsp = malloc(sizeof(*tlsp), M_CXGBE, M_ZERO | flags);
if (tlsp == NULL)
return (NULL);
cxgbe_snd_tag_init(&tlsp->com, ifp, IF_SND_TAG_TYPE_TLS);
tlsp->vi = vi;
tlsp->sc = sc;
tlsp->ctrlq = &sc->sge.ctrlq[pi->port_id];
tlsp->tid = -1;
tlsp->tx_key_addr = -1;
return (tlsp);
}
static void
init_ktls_key_params(struct tlspcb *tlsp, const struct ktls_session *tls)
{
int mac_key_size;
if (tls->params.tls_vminor == TLS_MINOR_VER_ONE)
tlsp->proto_ver = SCMD_PROTO_VERSION_TLS_1_1;
else
tlsp->proto_ver = SCMD_PROTO_VERSION_TLS_1_2;
tlsp->cipher_secret_size = tls->params.cipher_key_len;
tlsp->tx_key_info_size = sizeof(struct tx_keyctx_hdr) +
tlsp->cipher_secret_size;
if (tls->params.cipher_algorithm == CRYPTO_AES_NIST_GCM_16) {
tlsp->auth_mode = SCMD_AUTH_MODE_GHASH;
tlsp->enc_mode = SCMD_CIPH_MODE_AES_GCM;
tlsp->iv_size = 4;
tlsp->mac_first = 0;
tlsp->hmac_ctrl = SCMD_HMAC_CTRL_NOP;
tlsp->tx_key_info_size += GMAC_BLOCK_LEN;
} else {
switch (tls->params.auth_algorithm) {
case CRYPTO_SHA1_HMAC:
mac_key_size = roundup2(SHA1_HASH_LEN, 16);
tlsp->auth_mode = SCMD_AUTH_MODE_SHA1;
break;
case CRYPTO_SHA2_256_HMAC:
mac_key_size = SHA2_256_HASH_LEN;
tlsp->auth_mode = SCMD_AUTH_MODE_SHA256;
break;
case CRYPTO_SHA2_384_HMAC:
mac_key_size = SHA2_512_HASH_LEN;
tlsp->auth_mode = SCMD_AUTH_MODE_SHA512_384;
break;
}
tlsp->enc_mode = SCMD_CIPH_MODE_AES_CBC;
tlsp->iv_size = 8; /* for CBC, iv is 16B, unit of 2B */
tlsp->mac_first = 1;
tlsp->hmac_ctrl = SCMD_HMAC_CTRL_NO_TRUNC;
tlsp->tx_key_info_size += mac_key_size * 2;
}
tlsp->frag_size = tls->params.max_frame_len;
}
static int
ktls_act_open_cpl_size(bool isipv6)
{
if (isipv6)
return (sizeof(struct cpl_t6_act_open_req6));
else
return (sizeof(struct cpl_t6_act_open_req));
}
static void
mk_ktls_act_open_req(struct adapter *sc, struct vi_info *vi, struct inpcb *inp,
struct tlspcb *tlsp, int atid, void *dst)
{
struct tcpcb *tp = intotcpcb(inp);
struct cpl_t6_act_open_req *cpl6;
struct cpl_act_open_req *cpl;
uint64_t options;
int qid_atid;
cpl6 = dst;
cpl = (struct cpl_act_open_req *)cpl6;
INIT_TP_WR(cpl6, 0);
qid_atid = V_TID_QID(sc->sge.fwq.abs_id) | V_TID_TID(atid) |
V_TID_COOKIE(CPL_COOKIE_KERN_TLS);
OPCODE_TID(cpl) = htobe32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ,
qid_atid));
inp_4tuple_get(inp, &cpl->local_ip, &cpl->local_port,
&cpl->peer_ip, &cpl->peer_port);
options = F_TCAM_BYPASS | V_ULP_MODE(ULP_MODE_NONE);
options |= V_SMAC_SEL(vi->smt_idx) | V_TX_CHAN(vi->pi->tx_chan);
options |= F_NON_OFFLOAD;
cpl->opt0 = htobe64(options);
options = V_TX_QUEUE(sc->params.tp.tx_modq[vi->pi->tx_chan]);
if (tp->t_flags & TF_REQ_TSTMP)
options |= F_TSTAMPS_EN;
cpl->opt2 = htobe32(options);
}
static void
mk_ktls_act_open_req6(struct adapter *sc, struct vi_info *vi,
struct inpcb *inp, struct tlspcb *tlsp, int atid, void *dst)
{
struct tcpcb *tp = intotcpcb(inp);
struct cpl_t6_act_open_req6 *cpl6;
struct cpl_act_open_req6 *cpl;
uint64_t options;
int qid_atid;
cpl6 = dst;
cpl = (struct cpl_act_open_req6 *)cpl6;
INIT_TP_WR(cpl6, 0);
qid_atid = V_TID_QID(sc->sge.fwq.abs_id) | V_TID_TID(atid) |
V_TID_COOKIE(CPL_COOKIE_KERN_TLS);
OPCODE_TID(cpl) = htobe32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ6,
qid_atid));
cpl->local_port = inp->inp_lport;
cpl->local_ip_hi = *(uint64_t *)&inp->in6p_laddr.s6_addr[0];
cpl->local_ip_lo = *(uint64_t *)&inp->in6p_laddr.s6_addr[8];
cpl->peer_port = inp->inp_fport;
cpl->peer_ip_hi = *(uint64_t *)&inp->in6p_faddr.s6_addr[0];
cpl->peer_ip_lo = *(uint64_t *)&inp->in6p_faddr.s6_addr[8];
options = F_TCAM_BYPASS | V_ULP_MODE(ULP_MODE_NONE);
options |= V_SMAC_SEL(vi->smt_idx) | V_TX_CHAN(vi->pi->tx_chan);
options |= F_NON_OFFLOAD;
cpl->opt0 = htobe64(options);
options = V_TX_QUEUE(sc->params.tp.tx_modq[vi->pi->tx_chan]);
if (tp->t_flags & TF_REQ_TSTMP)
options |= F_TSTAMPS_EN;
cpl->opt2 = htobe32(options);
}
static int
send_ktls_act_open_req(struct adapter *sc, struct vi_info *vi,
struct inpcb *inp, struct tlspcb *tlsp, int atid)
{
struct wrqe *wr;
bool isipv6;
isipv6 = (inp->inp_vflag & INP_IPV6) != 0;
if (isipv6) {
tlsp->ce = t4_hold_lip(sc, &inp->in6p_laddr, NULL);
if (tlsp->ce == NULL)
return (ENOENT);
}
wr = alloc_wrqe(ktls_act_open_cpl_size(isipv6), tlsp->ctrlq);
if (wr == NULL) {
CTR2(KTR_CXGBE, "%s: atid %d failed to alloc WR", __func__,
atid);
return (ENOMEM);
}
if (isipv6)
mk_ktls_act_open_req6(sc, vi, inp, tlsp, atid, wrtod(wr));
else
mk_ktls_act_open_req(sc, vi, inp, tlsp, atid, wrtod(wr));
tlsp->open_pending = true;
t4_wrq_tx(sc, wr);
return (0);
}
static int
ktls_act_open_rpl(struct sge_iq *iq, const struct rss_header *rss,
struct mbuf *m)
{
struct adapter *sc = iq->adapter;
const struct cpl_act_open_rpl *cpl = (const void *)(rss + 1);
u_int atid = G_TID_TID(G_AOPEN_ATID(be32toh(cpl->atid_status)));
u_int status = G_AOPEN_STATUS(be32toh(cpl->atid_status));
struct tlspcb *tlsp = lookup_atid(sc, atid);
struct inpcb *inp = tlsp->inp;
CTR3(KTR_CXGBE, "%s: atid %d status %d", __func__, atid, status);
free_atid(sc, atid);
if (status == 0)
tlsp->tid = GET_TID(cpl);
INP_WLOCK(inp);
tlsp->open_pending = false;
wakeup(tlsp);
INP_WUNLOCK(inp);
return (0);
}
/* SET_TCB_FIELD sent as a ULP command looks like this */
#define LEN__SET_TCB_FIELD_ULP (sizeof(struct ulp_txpkt) + \
sizeof(struct ulptx_idata) + sizeof(struct cpl_set_tcb_field_core))
_Static_assert((LEN__SET_TCB_FIELD_ULP + sizeof(struct ulptx_idata)) % 16 == 0,
"CPL_SET_TCB_FIELD ULP command not 16-byte aligned");
static void
write_set_tcb_field_ulp(struct tlspcb *tlsp, void *dst, struct sge_txq *txq,
uint16_t word, uint64_t mask, uint64_t val)
{
struct ulp_txpkt *txpkt;
struct ulptx_idata *idata;
struct cpl_set_tcb_field_core *cpl;
/* ULP_TXPKT */
txpkt = dst;
txpkt->cmd_dest = htobe32(V_ULPTX_CMD(ULP_TX_PKT) |
V_ULP_TXPKT_DATAMODIFY(0) |
V_ULP_TXPKT_CHANNELID(tlsp->vi->pi->port_id) | V_ULP_TXPKT_DEST(0) |
V_ULP_TXPKT_FID(txq->eq.cntxt_id) | V_ULP_TXPKT_RO(1));
txpkt->len = htobe32(howmany(LEN__SET_TCB_FIELD_ULP, 16));
/* ULPTX_IDATA sub-command */
idata = (struct ulptx_idata *)(txpkt + 1);
idata->cmd_more = htobe32(V_ULPTX_CMD(ULP_TX_SC_IMM));
idata->len = htobe32(sizeof(*cpl));
/* CPL_SET_TCB_FIELD */
cpl = (struct cpl_set_tcb_field_core *)(idata + 1);
OPCODE_TID(cpl) = htobe32(MK_OPCODE_TID(CPL_SET_TCB_FIELD, tlsp->tid));
cpl->reply_ctrl = htobe16(F_NO_REPLY);
cpl->word_cookie = htobe16(V_WORD(word));
cpl->mask = htobe64(mask);
cpl->val = htobe64(val);
/* ULPTX_NOOP */
idata = (struct ulptx_idata *)(cpl + 1);
idata->cmd_more = htobe32(V_ULPTX_CMD(ULP_TX_SC_NOOP));
idata->len = htobe32(0);
}
static int
ktls_set_tcb_fields(struct tlspcb *tlsp, struct tcpcb *tp, struct sge_txq *txq)
{
struct fw_ulptx_wr *wr;
struct mbuf *m;
char *dst;
void *items[1];
int error, len;
len = sizeof(*wr) + 3 * roundup2(LEN__SET_TCB_FIELD_ULP, 16);
if (tp->t_flags & TF_REQ_TSTMP)
len += roundup2(LEN__SET_TCB_FIELD_ULP, 16);
m = alloc_wr_mbuf(len, M_NOWAIT);
if (m == NULL) {
CTR2(KTR_CXGBE, "%s: tid %d failed to alloc WR mbuf", __func__,
tlsp->tid);
return (ENOMEM);
}
m->m_pkthdr.snd_tag = m_snd_tag_ref(&tlsp->com.com);
m->m_pkthdr.csum_flags |= CSUM_SND_TAG;
/* FW_ULPTX_WR */
wr = mtod(m, void *);
wr->op_to_compl = htobe32(V_FW_WR_OP(FW_ULPTX_WR));
wr->flowid_len16 = htobe32(F_FW_ULPTX_WR_DATA |
V_FW_WR_LEN16(len / 16));
wr->cookie = 0;
dst = (char *)(wr + 1);
/* Clear TF_NON_OFFLOAD and set TF_CORE_BYPASS */
write_set_tcb_field_ulp(tlsp, dst, txq, W_TCB_T_FLAGS,
V_TCB_T_FLAGS(V_TF_CORE_BYPASS(1) | V_TF_NON_OFFLOAD(1)),
V_TCB_T_FLAGS(V_TF_CORE_BYPASS(1)));
dst += roundup2(LEN__SET_TCB_FIELD_ULP, 16);
/* Clear the SND_UNA_RAW, SND_NXT_RAW, and SND_MAX_RAW offsets. */
write_set_tcb_field_ulp(tlsp, dst, txq, W_TCB_SND_UNA_RAW,
V_TCB_SND_NXT_RAW(M_TCB_SND_NXT_RAW) |
V_TCB_SND_UNA_RAW(M_TCB_SND_UNA_RAW),
V_TCB_SND_NXT_RAW(0) | V_TCB_SND_UNA_RAW(0));
dst += roundup2(LEN__SET_TCB_FIELD_ULP, 16);
write_set_tcb_field_ulp(tlsp, dst, txq, W_TCB_SND_MAX_RAW,
V_TCB_SND_MAX_RAW(M_TCB_SND_MAX_RAW), V_TCB_SND_MAX_RAW(0));
dst += roundup2(LEN__SET_TCB_FIELD_ULP, 16);
if (tp->t_flags & TF_REQ_TSTMP) {
write_set_tcb_field_ulp(tlsp, dst, txq, W_TCB_TIMESTAMP_OFFSET,
V_TCB_TIMESTAMP_OFFSET(M_TCB_TIMESTAMP_OFFSET),
V_TCB_TIMESTAMP_OFFSET(tp->ts_offset >> 28));
dst += roundup2(LEN__SET_TCB_FIELD_ULP, 16);
}
KASSERT(dst - (char *)wr == len, ("%s: length mismatch", __func__));
items[0] = m;
error = mp_ring_enqueue(txq->r, items, 1, 1);
if (error)
m_free(m);
return (error);
}
int
cxgbe_tls_tag_alloc(struct ifnet *ifp, union if_snd_tag_alloc_params *params,
struct m_snd_tag **pt)
{
const struct ktls_session *tls;
struct tlspcb *tlsp;
struct adapter *sc;
struct vi_info *vi;
struct inpcb *inp;
struct tcpcb *tp;
struct sge_txq *txq;
int atid, error, keyid;
tls = params->tls.tls;
/* Only TLS 1.1 and TLS 1.2 are currently supported. */
if (tls->params.tls_vmajor != TLS_MAJOR_VER_ONE ||
tls->params.tls_vminor < TLS_MINOR_VER_ONE ||
tls->params.tls_vminor > TLS_MINOR_VER_TWO)
return (EPROTONOSUPPORT);
/* Sanity check values in *tls. */
switch (tls->params.cipher_algorithm) {
case CRYPTO_AES_CBC:
/* XXX: Explicitly ignore any provided IV. */
switch (tls->params.cipher_key_len) {
case 128 / 8:
case 192 / 8:
case 256 / 8:
break;
default:
return (EINVAL);
}
switch (tls->params.auth_algorithm) {
case CRYPTO_SHA1_HMAC:
case CRYPTO_SHA2_256_HMAC:
case CRYPTO_SHA2_384_HMAC:
break;
default:
return (EPROTONOSUPPORT);
}
break;
case CRYPTO_AES_NIST_GCM_16:
if (tls->params.iv_len != SALT_SIZE)
return (EINVAL);
switch (tls->params.cipher_key_len) {
case 128 / 8:
case 192 / 8:
case 256 / 8:
break;
default:
return (EINVAL);
}
break;
default:
return (EPROTONOSUPPORT);
}
vi = ifp->if_softc;
sc = vi->pi->adapter;
tlsp = alloc_tlspcb(ifp, vi, M_WAITOK);
atid = alloc_atid(sc, tlsp);
if (atid < 0) {
error = ENOMEM;
goto failed;
}
if (sc->tlst.inline_keys)
keyid = -1;
else
keyid = get_new_keyid(tlsp);
if (keyid < 0) {
CTR2(KTR_CXGBE, "%s: atid %d using immediate key ctx", __func__,
atid);
tlsp->inline_key = true;
} else {
tlsp->tx_key_addr = keyid;
CTR3(KTR_CXGBE, "%s: atid %d allocated TX key addr %#x",
__func__,
atid, tlsp->tx_key_addr);
}
inp = params->tls.inp;
INP_RLOCK(inp);
if (inp->inp_flags & (INP_TIMEWAIT | INP_DROPPED)) {
INP_RUNLOCK(inp);
error = ECONNRESET;
goto failed;
}
tlsp->inp = inp;
tp = inp->inp_ppcb;
if (tp->t_flags & TF_REQ_TSTMP) {
tlsp->using_timestamps = true;
if ((tp->ts_offset & 0xfffffff) != 0) {
INP_RUNLOCK(inp);
error = EINVAL;
goto failed;
}
} else
tlsp->using_timestamps = false;
error = send_ktls_act_open_req(sc, vi, inp, tlsp, atid);
if (error) {
INP_RUNLOCK(inp);
goto failed;
}
/* Wait for reply to active open. */
CTR2(KTR_CXGBE, "%s: atid %d sent CPL_ACT_OPEN_REQ", __func__,
atid);
while (tlsp->open_pending) {
/*
* XXX: PCATCH? We would then have to discard the PCB
* when the completion CPL arrived.
*/
error = rw_sleep(tlsp, &inp->inp_lock, 0, "t6tlsop", 0);
}
atid = -1;
if (tlsp->tid < 0) {
INP_RUNLOCK(inp);
error = ENOMEM;
goto failed;
}
if (inp->inp_flags & (INP_TIMEWAIT | INP_DROPPED)) {
INP_RUNLOCK(inp);
error = ECONNRESET;
goto failed;
}
txq = &sc->sge.txq[vi->first_txq];
if (inp->inp_flowtype != M_HASHTYPE_NONE)
txq += ((inp->inp_flowid % (vi->ntxq - vi->rsrv_noflowq)) +
vi->rsrv_noflowq);
tlsp->txq = txq;
error = ktls_set_tcb_fields(tlsp, tp, txq);
INP_RUNLOCK(inp);
if (error)
goto failed;
init_ktls_key_params(tlsp, tls);
error = ktls_setup_keys(tlsp, tls, txq);
if (error)
goto failed;
/* The SCMD fields used when encrypting a full TLS record. */
tlsp->scmd0.seqno_numivs = htobe32(V_SCMD_SEQ_NO_CTRL(3) |
V_SCMD_PROTO_VERSION(tlsp->proto_ver) |
V_SCMD_ENC_DEC_CTRL(SCMD_ENCDECCTRL_ENCRYPT) |
V_SCMD_CIPH_AUTH_SEQ_CTRL((tlsp->mac_first == 0)) |
V_SCMD_CIPH_MODE(tlsp->enc_mode) |
V_SCMD_AUTH_MODE(tlsp->auth_mode) |
V_SCMD_HMAC_CTRL(tlsp->hmac_ctrl) |
V_SCMD_IV_SIZE(tlsp->iv_size) | V_SCMD_NUM_IVS(1));
tlsp->scmd0.ivgen_hdrlen = V_SCMD_IV_GEN_CTRL(0) |
V_SCMD_TLS_FRAG_ENABLE(0);
if (tlsp->inline_key)
tlsp->scmd0.ivgen_hdrlen |= V_SCMD_KEY_CTX_INLINE(1);
tlsp->scmd0.ivgen_hdrlen = htobe32(tlsp->scmd0.ivgen_hdrlen);
/*
* The SCMD fields used when encrypting a partial TLS record
* (no trailer and possibly a truncated payload).
*/
tlsp->scmd0_short.seqno_numivs = V_SCMD_SEQ_NO_CTRL(0) |
V_SCMD_PROTO_VERSION(SCMD_PROTO_VERSION_GENERIC) |
V_SCMD_ENC_DEC_CTRL(SCMD_ENCDECCTRL_ENCRYPT) |
V_SCMD_CIPH_AUTH_SEQ_CTRL((tlsp->mac_first == 0)) |
V_SCMD_AUTH_MODE(SCMD_AUTH_MODE_NOP) |
V_SCMD_HMAC_CTRL(SCMD_HMAC_CTRL_NOP) |
V_SCMD_IV_SIZE(AES_BLOCK_LEN / 2) | V_SCMD_NUM_IVS(0);
if (tlsp->enc_mode == SCMD_CIPH_MODE_AES_GCM)
tlsp->scmd0_short.seqno_numivs |=
V_SCMD_CIPH_MODE(SCMD_CIPH_MODE_AES_CTR);
else
tlsp->scmd0_short.seqno_numivs |=
V_SCMD_CIPH_MODE(tlsp->enc_mode);
tlsp->scmd0_short.seqno_numivs =
htobe32(tlsp->scmd0_short.seqno_numivs);
tlsp->scmd0_short.ivgen_hdrlen = V_SCMD_IV_GEN_CTRL(0) |
V_SCMD_TLS_FRAG_ENABLE(0) |
V_SCMD_AADIVDROP(1);
if (tlsp->inline_key)
tlsp->scmd0_short.ivgen_hdrlen |= V_SCMD_KEY_CTX_INLINE(1);
TXQ_LOCK(txq);
if (tlsp->enc_mode == SCMD_CIPH_MODE_AES_GCM)
txq->kern_tls_gcm++;
else
txq->kern_tls_cbc++;
TXQ_UNLOCK(txq);
*pt = &tlsp->com.com;
return (0);
failed:
if (atid >= 0)
free_atid(sc, atid);
m_snd_tag_rele(&tlsp->com.com);
return (error);
}
/* XXX: Should share this with ccr(4) eventually. */
static void
init_ktls_gmac_hash(const char *key, int klen, char *ghash)
{
static char zeroes[GMAC_BLOCK_LEN];
uint32_t keysched[4 * (RIJNDAEL_MAXNR + 1)];
int rounds;
rounds = rijndaelKeySetupEnc(keysched, key, klen);
rijndaelEncrypt(keysched, rounds, zeroes, ghash);
}
/* XXX: Should share this with ccr(4) eventually. */
static void
ktls_copy_partial_hash(void *dst, int cri_alg, union authctx *auth_ctx)
{
uint32_t *u32;
uint64_t *u64;
u_int i;
u32 = (uint32_t *)dst;
u64 = (uint64_t *)dst;
switch (cri_alg) {
case CRYPTO_SHA1_HMAC:
for (i = 0; i < SHA1_HASH_LEN / 4; i++)
u32[i] = htobe32(auth_ctx->sha1ctx.h.b32[i]);
break;
case CRYPTO_SHA2_256_HMAC:
for (i = 0; i < SHA2_256_HASH_LEN / 4; i++)
u32[i] = htobe32(auth_ctx->sha256ctx.state[i]);
break;
case CRYPTO_SHA2_384_HMAC:
for (i = 0; i < SHA2_512_HASH_LEN / 8; i++)
u64[i] = htobe64(auth_ctx->sha384ctx.state[i]);
break;
}
}
static void
init_ktls_hmac_digest(struct auth_hash *axf, u_int partial_digest_len,
char *key, int klen, char *dst)
{
union authctx auth_ctx;
char ipad[SHA2_512_BLOCK_LEN], opad[SHA2_512_BLOCK_LEN];
u_int i;
/*
* If the key is larger than the block size, use the digest of
* the key as the key instead.
*/
klen /= 8;
if (klen > axf->blocksize) {
axf->Init(&auth_ctx);
axf->Update(&auth_ctx, key, klen);
axf->Final(ipad, &auth_ctx);
klen = axf->hashsize;
} else
memcpy(ipad, key, klen);
memset(ipad + klen, 0, axf->blocksize - klen);
memcpy(opad, ipad, axf->blocksize);
for (i = 0; i < axf->blocksize; i++) {
ipad[i] ^= HMAC_IPAD_VAL;
opad[i] ^= HMAC_OPAD_VAL;
}
/*
* Hash the raw ipad and opad and store the partial results in
* the key context.
*/
axf->Init(&auth_ctx);
axf->Update(&auth_ctx, ipad, axf->blocksize);
ktls_copy_partial_hash(dst, axf->type, &auth_ctx);
dst += roundup2(partial_digest_len, 16);
axf->Init(&auth_ctx);
axf->Update(&auth_ctx, opad, axf->blocksize);
ktls_copy_partial_hash(dst, axf->type, &auth_ctx);
}
static int
ktls_setup_keys(struct tlspcb *tlsp, const struct ktls_session *tls,
struct sge_txq *txq)
{
struct auth_hash *axf;
int error, keyid, kwrlen, kctxlen, len;
struct tls_key_req *kwr;
struct tls_keyctx *kctx;
void *items[1], *key;
struct tx_keyctx_hdr *khdr;
unsigned int ck_size, mk_size, partial_digest_len;
struct mbuf *m;
/*
* Store the salt and keys in the key context. For
* connections with an inline key, this key context is passed
* as immediate data in each work request. For connections
* storing the key in DDR, a work request is used to store a
* copy of the key context in DDR.
*/
kctx = &tlsp->keyctx;
khdr = &kctx->txhdr;
switch (tlsp->cipher_secret_size) {
case 128 / 8:
ck_size = CHCR_KEYCTX_CIPHER_KEY_SIZE_128;
break;
case 192 / 8:
ck_size = CHCR_KEYCTX_CIPHER_KEY_SIZE_192;
break;
case 256 / 8:
ck_size = CHCR_KEYCTX_CIPHER_KEY_SIZE_256;
break;
default:
panic("bad key size");
}
axf = NULL;
partial_digest_len = 0;
if (tlsp->enc_mode == SCMD_CIPH_MODE_AES_GCM)
mk_size = CHCR_KEYCTX_MAC_KEY_SIZE_512;
else {
switch (tlsp->auth_mode) {
case SCMD_AUTH_MODE_SHA1:
axf = &auth_hash_hmac_sha1;
mk_size = CHCR_KEYCTX_MAC_KEY_SIZE_160;
partial_digest_len = SHA1_HASH_LEN;
break;
case SCMD_AUTH_MODE_SHA256:
axf = &auth_hash_hmac_sha2_256;
mk_size = CHCR_KEYCTX_MAC_KEY_SIZE_256;
partial_digest_len = SHA2_256_HASH_LEN;
break;
case SCMD_AUTH_MODE_SHA512_384:
axf = &auth_hash_hmac_sha2_384;
mk_size = CHCR_KEYCTX_MAC_KEY_SIZE_512;
partial_digest_len = SHA2_512_HASH_LEN;
break;
default:
panic("bad auth mode");
}
}
khdr->ctxlen = (tlsp->tx_key_info_size >> 4);
khdr->dualck_to_txvalid = V_TLS_KEYCTX_TX_WR_SALT_PRESENT(1) |
V_TLS_KEYCTX_TX_WR_TXCK_SIZE(ck_size) |
V_TLS_KEYCTX_TX_WR_TXMK_SIZE(mk_size) |
V_TLS_KEYCTX_TX_WR_TXVALID(1);
if (tlsp->enc_mode != SCMD_CIPH_MODE_AES_GCM)
khdr->dualck_to_txvalid |= V_TLS_KEYCTX_TX_WR_TXOPAD_PRESENT(1);
khdr->dualck_to_txvalid = htobe16(khdr->dualck_to_txvalid);
key = kctx->keys.edkey;
memcpy(key, tls->params.cipher_key, tls->params.cipher_key_len);
if (tlsp->enc_mode == SCMD_CIPH_MODE_AES_GCM) {
memcpy(khdr->txsalt, tls->params.iv, SALT_SIZE);
init_ktls_gmac_hash(tls->params.cipher_key,
tls->params.cipher_key_len * 8,
(char *)key + tls->params.cipher_key_len);
} else {
init_ktls_hmac_digest(axf, partial_digest_len,
tls->params.auth_key, tls->params.auth_key_len * 8,
(char *)key + tls->params.cipher_key_len);
}
if (tlsp->inline_key)
return (0);
keyid = tlsp->tx_key_addr;
/* Populate key work request. */
kwrlen = sizeof(*kwr);
kctxlen = roundup2(sizeof(*kctx), 32);
len = kwrlen + kctxlen;
m = alloc_wr_mbuf(len, M_NOWAIT);
if (m == NULL) {
CTR2(KTR_CXGBE, "%s: tid %d failed to alloc WR mbuf", __func__,
tlsp->tid);
return (ENOMEM);
}
m->m_pkthdr.snd_tag = m_snd_tag_ref(&tlsp->com.com);
m->m_pkthdr.csum_flags |= CSUM_SND_TAG;
kwr = mtod(m, void *);
memset(kwr, 0, len);
kwr->wr_hi = htobe32(V_FW_WR_OP(FW_ULPTX_WR) |
F_FW_WR_ATOMIC);
kwr->wr_mid = htobe32(V_FW_WR_LEN16(DIV_ROUND_UP(len, 16)));
kwr->protocol = tlsp->proto_ver;
kwr->mfs = htons(tlsp->frag_size);
kwr->reneg_to_write_rx = KEY_WRITE_TX;
/* master command */
kwr->cmd = htobe32(V_ULPTX_CMD(ULP_TX_MEM_WRITE) |
V_T5_ULP_MEMIO_ORDER(1) | V_T5_ULP_MEMIO_IMM(1));
kwr->dlen = htobe32(V_ULP_MEMIO_DATA_LEN(kctxlen >> 5));
kwr->len16 = htobe32((tlsp->tid << 8) |
DIV_ROUND_UP(len - sizeof(struct work_request_hdr), 16));
kwr->kaddr = htobe32(V_ULP_MEMIO_ADDR(keyid >> 5));
/* sub command */
kwr->sc_more = htobe32(V_ULPTX_CMD(ULP_TX_SC_IMM));
kwr->sc_len = htobe32(kctxlen);
kctx = (struct tls_keyctx *)(kwr + 1);
memcpy(kctx, &tlsp->keyctx, sizeof(*kctx));
/*
* Place the key work request in the transmit queue. It
* should be sent to the NIC before any TLS packets using this
* session.
*/
items[0] = m;
error = mp_ring_enqueue(txq->r, items, 1, 1);
if (error)
m_free(m);
else
CTR2(KTR_CXGBE, "%s: tid %d sent key WR", __func__, tlsp->tid);
return (error);
}
static u_int
ktls_base_wr_size(struct tlspcb *tlsp)
{
u_int wr_len;
wr_len = sizeof(struct fw_ulptx_wr); // 16
wr_len += sizeof(struct ulp_txpkt); // 8
wr_len += sizeof(struct ulptx_idata); // 8
wr_len += sizeof(struct cpl_tx_sec_pdu);// 32
if (tlsp->inline_key)
wr_len += tlsp->tx_key_info_size;
else {
wr_len += sizeof(struct ulptx_sc_memrd);// 8
wr_len += sizeof(struct ulptx_idata); // 8
}
wr_len += sizeof(struct cpl_tx_data); // 16
return (wr_len);
}
/* How many bytes of TCP payload to send for a given TLS record. */
static u_int
ktls_tcp_payload_length(struct tlspcb *tlsp, struct mbuf *m_tls)
{
struct mbuf_ext_pgs *ext_pgs;
struct tls_record_layer *hdr;
u_int plen, mlen;
MBUF_EXT_PGS_ASSERT(m_tls);
ext_pgs = m_tls->m_ext.ext_pgs;
hdr = (void *)ext_pgs->hdr;
plen = ntohs(hdr->tls_length);
/*
* What range of the TLS record is the mbuf requesting to be
* sent.
*/
mlen = mtod(m_tls, vm_offset_t) + m_tls->m_len;
/* Always send complete records. */
if (mlen == TLS_HEADER_LENGTH + plen)
return (mlen);
/*
* If the host stack has asked to send part of the trailer,
* trim the length to avoid sending any of the trailer. There
* is no way to send a partial trailer currently.
*/
if (mlen > TLS_HEADER_LENGTH + plen - ext_pgs->trail_len)
mlen = TLS_HEADER_LENGTH + plen - ext_pgs->trail_len;
/*
* For AES-CBC adjust the ciphertext length for the block
* size.
*/
if (tlsp->enc_mode == SCMD_CIPH_MODE_AES_CBC &&
mlen > TLS_HEADER_LENGTH) {
mlen = TLS_HEADER_LENGTH + rounddown(mlen - TLS_HEADER_LENGTH,
AES_BLOCK_LEN);
}
#ifdef VERBOSE_TRACES
CTR4(KTR_CXGBE, "%s: tid %d short TLS record (%u vs %u)",
__func__, tlsp->tid, mlen, TLS_HEADER_LENGTH + plen);
#endif
return (mlen);
}
/*
* For a "short" TLS record, determine the offset into the TLS record
* payload to send. This offset does not include the TLS header, but
* a non-zero offset implies that a header will not be sent.
*/
static u_int
ktls_payload_offset(struct tlspcb *tlsp, struct mbuf *m_tls)
{
struct mbuf_ext_pgs *ext_pgs;
struct tls_record_layer *hdr;
u_int offset, plen;
#ifdef INVARIANTS
u_int mlen;
#endif
MBUF_EXT_PGS_ASSERT(m_tls);
ext_pgs = m_tls->m_ext.ext_pgs;
hdr = (void *)ext_pgs->hdr;
plen = ntohs(hdr->tls_length);
#ifdef INVARIANTS
mlen = mtod(m_tls, vm_offset_t) + m_tls->m_len;
MPASS(mlen < TLS_HEADER_LENGTH + plen);
#endif
if (mtod(m_tls, vm_offset_t) <= ext_pgs->hdr_len)
return (0);
if (tlsp->enc_mode == SCMD_CIPH_MODE_AES_GCM) {
/*
* Always send something. This function is only called
* if we aren't sending the tag at all, but if the
* request starts in the tag then we are in an odd
* state where would effectively send nothing. Cap
* the offset at the last byte of the record payload
* to send the last cipher block.
*/
offset = min(mtod(m_tls, vm_offset_t) - ext_pgs->hdr_len,
(plen - TLS_HEADER_LENGTH - ext_pgs->trail_len) - 1);
return (rounddown(offset, AES_BLOCK_LEN));
}
return (0);
}
static u_int
ktls_sgl_size(u_int nsegs)
{
u_int wr_len;
/* First segment is part of ulptx_sgl. */
nsegs--;
wr_len = sizeof(struct ulptx_sgl);
wr_len += 8 * ((3 * nsegs) / 2 + (nsegs & 1));
return (wr_len);
}
static int
ktls_wr_len(struct tlspcb *tlsp, struct mbuf *m, struct mbuf *m_tls,
int *nsegsp)
{
struct mbuf_ext_pgs *ext_pgs;
struct tls_record_layer *hdr;
u_int imm_len, offset, plen, wr_len, tlen;
MBUF_EXT_PGS_ASSERT(m_tls);
ext_pgs = m_tls->m_ext.ext_pgs;
/*
* Determine the size of the TLS record payload to send
* excluding header and trailer.
*/
tlen = ktls_tcp_payload_length(tlsp, m_tls);
if (tlen <= ext_pgs->hdr_len) {
/*
* For requests that only want to send the TLS header,
* send a tunnelled packet as immediate data.
*/
wr_len = sizeof(struct fw_eth_tx_pkt_wr) +
sizeof(struct cpl_tx_pkt_core) +
roundup2(m->m_len + m_tls->m_len, 16);
if (wr_len > SGE_MAX_WR_LEN) {
CTR3(KTR_CXGBE,
"%s: tid %d TLS header-only packet too long (len %d)",
__func__, tlsp->tid, m->m_len + m_tls->m_len);
}
/* This should always be the last TLS record in a chain. */
MPASS(m_tls->m_next == NULL);
/*
* XXX: Set a bogus 'nsegs' value to avoid tripping an
* assertion in mbuf_nsegs() in t4_sge.c.
*/
*nsegsp = 1;
return (wr_len);
}
hdr = (void *)ext_pgs->hdr;
plen = TLS_HEADER_LENGTH + ntohs(hdr->tls_length) - ext_pgs->trail_len;
if (tlen < plen) {
plen = tlen;
offset = ktls_payload_offset(tlsp, m_tls);
} else
offset = 0;
/* Calculate the size of the work request. */
wr_len = ktls_base_wr_size(tlsp);
/*
* Full records and short records with an offset of 0 include
* the TLS header as immediate data. Short records include a
* raw AES IV as immediate data.
*/
imm_len = 0;
if (offset == 0)
imm_len += ext_pgs->hdr_len;
if (plen == tlen)
imm_len += AES_BLOCK_LEN;
wr_len += roundup2(imm_len, 16);
/* TLS record payload via DSGL. */
*nsegsp = sglist_count_ext_pgs(ext_pgs, ext_pgs->hdr_len + offset,
plen - (ext_pgs->hdr_len + offset));
wr_len += ktls_sgl_size(*nsegsp);
wr_len = roundup2(wr_len, 16);
return (wr_len);
}
/*
* See if we have any TCP options requiring a dedicated options-only
* packet.
*/
static int
ktls_has_tcp_options(struct tcphdr *tcp)
{
u_char *cp;
int cnt, opt, optlen;
cp = (u_char *)(tcp + 1);
cnt = tcp->th_off * 4 - 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:
case TCPOPT_TIMESTAMP:
break;
default:
return (1);
}
}
return (0);
}
/*
* Find the TCP timestamp option.
*/
static void *
ktls_find_tcp_timestamps(struct tcphdr *tcp)
{
u_char *cp;
int cnt, opt, optlen;
cp = (u_char *)(tcp + 1);
cnt = tcp->th_off * 4 - 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;
}
if (opt == TCPOPT_TIMESTAMP && optlen == TCPOLEN_TIMESTAMP)
return (cp + 2);
}
return (NULL);
}
int
t6_ktls_parse_pkt(struct mbuf *m, int *nsegsp, int *len16p)
{
struct tlspcb *tlsp;
struct ether_header *eh;
struct ip *ip;
struct ip6_hdr *ip6;
struct tcphdr *tcp;
struct mbuf *m_tls;
int nsegs;
u_int wr_len, tot_len;
/*
* Locate headers in initial mbuf.
*
* XXX: This assumes all of the headers are in the initial mbuf.
* Could perhaps use m_advance() like parse_pkt() if that turns
* out to not be true.
*/
M_ASSERTPKTHDR(m);
MPASS(m->m_pkthdr.snd_tag != NULL);
tlsp = mst_to_tls(m->m_pkthdr.snd_tag);
if (m->m_len <= sizeof(*eh) + sizeof(*ip)) {
CTR2(KTR_CXGBE, "%s: tid %d header mbuf too short", __func__,
tlsp->tid);
return (EINVAL);
}
eh = mtod(m, struct ether_header *);
if (ntohs(eh->ether_type) != ETHERTYPE_IP &&
ntohs(eh->ether_type) != ETHERTYPE_IPV6) {
CTR2(KTR_CXGBE, "%s: tid %d mbuf not ETHERTYPE_IP{,V6}",
__func__, tlsp->tid);
return (EINVAL);
}
m->m_pkthdr.l2hlen = sizeof(*eh);
/* XXX: Reject unsupported IP options? */
if (ntohs(eh->ether_type) == ETHERTYPE_IP) {
ip = (struct ip *)(eh + 1);
if (ip->ip_p != IPPROTO_TCP) {
CTR2(KTR_CXGBE, "%s: tid %d mbuf not IPPROTO_TCP",
__func__, tlsp->tid);
return (EINVAL);
}
m->m_pkthdr.l3hlen = ip->ip_hl * 4;
} else {
ip6 = (struct ip6_hdr *)(eh + 1);
if (ip6->ip6_nxt != IPPROTO_TCP) {
CTR3(KTR_CXGBE, "%s: tid %d mbuf not IPPROTO_TCP (%u)",
__func__, tlsp->tid, ip6->ip6_nxt);
return (EINVAL);
}
m->m_pkthdr.l3hlen = sizeof(struct ip6_hdr);
}
if (m->m_len < m->m_pkthdr.l2hlen + m->m_pkthdr.l3hlen +
sizeof(*tcp)) {
CTR2(KTR_CXGBE, "%s: tid %d header mbuf too short (2)",
__func__, tlsp->tid);
return (EINVAL);
}
tcp = (struct tcphdr *)((char *)(eh + 1) + m->m_pkthdr.l3hlen);
m->m_pkthdr.l4hlen = tcp->th_off * 4;
/* Bail if there is TCP payload before the TLS record. */
if (m->m_len != m->m_pkthdr.l2hlen + m->m_pkthdr.l3hlen +
m->m_pkthdr.l4hlen) {
CTR6(KTR_CXGBE,
"%s: tid %d header mbuf bad length (%d + %d + %d != %d)",
__func__, tlsp->tid, m->m_pkthdr.l2hlen,
m->m_pkthdr.l3hlen, m->m_pkthdr.l4hlen, m->m_len);
return (EINVAL);
}
/* Assume all headers are in 'm' for now. */
MPASS(m->m_next != NULL);
MPASS(m->m_next->m_flags & M_NOMAP);
tot_len = 0;
/*
* Each of the remaining mbufs in the chain should reference a
* TLS record.
*/
*nsegsp = 0;
for (m_tls = m->m_next; m_tls != NULL; m_tls = m_tls->m_next) {
MPASS(m_tls->m_flags & M_NOMAP);
wr_len = ktls_wr_len(tlsp, m, m_tls, &nsegs);
#ifdef VERBOSE_TRACES
CTR4(KTR_CXGBE, "%s: tid %d wr_len %d nsegs %d", __func__,
tlsp->tid, wr_len, nsegs);
#endif
if (wr_len > SGE_MAX_WR_LEN || nsegs > TX_SGL_SEGS)
return (EFBIG);
tot_len += roundup2(wr_len, EQ_ESIZE);
/*
* Store 'nsegs' for the first TLS record in the
* header mbuf's metadata.
*/
if (*nsegsp == 0)
*nsegsp = nsegs;
}
MPASS(tot_len != 0);
/*
* See if we have any TCP options or a FIN requiring a
* dedicated packet.
*/
if ((tcp->th_flags & TH_FIN) != 0 || ktls_has_tcp_options(tcp)) {
wr_len = sizeof(struct fw_eth_tx_pkt_wr) +
sizeof(struct cpl_tx_pkt_core) + roundup2(m->m_len, 16);
if (wr_len > SGE_MAX_WR_LEN) {
CTR3(KTR_CXGBE,
"%s: tid %d options-only packet too long (len %d)",
__func__, tlsp->tid, m->m_len);
return (EINVAL);
}
tot_len += roundup2(wr_len, EQ_ESIZE);
}
/* Include room for a TP work request to program an L2T entry. */
tot_len += EQ_ESIZE;
/*
* Include room for a ULPTX work request including up to 5
* CPL_SET_TCB_FIELD commands before the first TLS work
* request.
*/
wr_len = sizeof(struct fw_ulptx_wr) +
5 * roundup2(LEN__SET_TCB_FIELD_ULP, 16);
/*
* If timestamps are present, reserve 1 more command for
* setting the echoed timestamp.
*/
if (tlsp->using_timestamps)
wr_len += roundup2(LEN__SET_TCB_FIELD_ULP, 16);
tot_len += roundup2(wr_len, EQ_ESIZE);
*len16p = tot_len / 16;
#ifdef VERBOSE_TRACES
CTR4(KTR_CXGBE, "%s: tid %d len16 %d nsegs %d", __func__,
tlsp->tid, *len16p, *nsegsp);
#endif
return (0);
}
/*
* If the SGL ends on an address that is not 16 byte aligned, this function will
* add a 0 filled flit at the end.
*/
static void
write_gl_to_buf(struct sglist *gl, caddr_t to)
{
struct sglist_seg *seg;
__be64 *flitp;
struct ulptx_sgl *usgl;
int i, nflits, nsegs;
KASSERT(((uintptr_t)to & 0xf) == 0,
("%s: SGL must start at a 16 byte boundary: %p", __func__, to));
nsegs = gl->sg_nseg;
MPASS(nsegs > 0);
nflits = (3 * (nsegs - 1)) / 2 + ((nsegs - 1) & 1) + 2;
flitp = (__be64 *)to;
seg = &gl->sg_segs[0];
usgl = (void *)flitp;
usgl->cmd_nsge = htobe32(V_ULPTX_CMD(ULP_TX_SC_DSGL) |
V_ULPTX_NSGE(nsegs));
usgl->len0 = htobe32(seg->ss_len);
usgl->addr0 = htobe64(seg->ss_paddr);
seg++;
for (i = 0; i < nsegs - 1; i++, seg++) {
usgl->sge[i / 2].len[i & 1] = htobe32(seg->ss_len);
usgl->sge[i / 2].addr[i & 1] = htobe64(seg->ss_paddr);
}
if (i & 1)
usgl->sge[i / 2].len[1] = htobe32(0);
flitp += nflits;
if (nflits & 1) {
MPASS(((uintptr_t)flitp) & 0xf);
*flitp++ = 0;
}
MPASS((((uintptr_t)flitp) & 0xf) == 0);
}
static inline void
copy_to_txd(struct sge_eq *eq, caddr_t from, caddr_t *to, int len)
{
MPASS((uintptr_t)(*to) >= (uintptr_t)&eq->desc[0]);
MPASS((uintptr_t)(*to) < (uintptr_t)&eq->desc[eq->sidx]);
if (__predict_true((uintptr_t)(*to) + len <=
(uintptr_t)&eq->desc[eq->sidx])) {
bcopy(from, *to, len);
(*to) += len;
if ((uintptr_t)(*to) == (uintptr_t)&eq->desc[eq->sidx])
(*to) = (caddr_t)eq->desc;
} else {
int portion = (uintptr_t)&eq->desc[eq->sidx] - (uintptr_t)(*to);
bcopy(from, *to, portion);
from += portion;
portion = len - portion; /* remaining */
bcopy(from, (void *)eq->desc, portion);
(*to) = (caddr_t)eq->desc + portion;
}
}
static int
ktls_write_tcp_options(struct sge_txq *txq, void *dst, struct mbuf *m,
u_int available, u_int pidx)
{
struct tx_sdesc *txsd;
struct fw_eth_tx_pkt_wr *wr;
struct cpl_tx_pkt_core *cpl;
uint32_t ctrl;
uint64_t ctrl1;
int len16, ndesc, pktlen;
struct ether_header *eh;
struct ip *ip, newip;
struct ip6_hdr *ip6, newip6;
struct tcphdr *tcp, newtcp;
caddr_t out;
TXQ_LOCK_ASSERT_OWNED(txq);
M_ASSERTPKTHDR(m);
wr = dst;
pktlen = m->m_len;
ctrl = sizeof(struct cpl_tx_pkt_core) + pktlen;
len16 = howmany(sizeof(struct fw_eth_tx_pkt_wr) + ctrl, 16);
ndesc = howmany(len16, EQ_ESIZE / 16);
MPASS(ndesc <= available);
/* Firmware work request header */
wr->op_immdlen = htobe32(V_FW_WR_OP(FW_ETH_TX_PKT_WR) |
V_FW_ETH_TX_PKT_WR_IMMDLEN(ctrl));
ctrl = V_FW_WR_LEN16(len16);
wr->equiq_to_len16 = htobe32(ctrl);
wr->r3 = 0;
cpl = (void *)(wr + 1);
/* Checksum offload */
ctrl1 = 0;
txq->txcsum++;
/* CPL header */
cpl->ctrl0 = txq->cpl_ctrl0;
cpl->pack = 0;
cpl->len = htobe16(pktlen);
cpl->ctrl1 = htobe64(ctrl1);
out = (void *)(cpl + 1);
/* Copy over Ethernet header. */
eh = mtod(m, struct ether_header *);
copy_to_txd(&txq->eq, (caddr_t)eh, &out, m->m_pkthdr.l2hlen);
/* Fixup length in IP header and copy out. */
if (ntohs(eh->ether_type) == ETHERTYPE_IP) {
ip = (void *)((char *)eh + m->m_pkthdr.l2hlen);
newip = *ip;
newip.ip_len = htons(pktlen - m->m_pkthdr.l2hlen);
copy_to_txd(&txq->eq, (caddr_t)&newip, &out, sizeof(newip));
if (m->m_pkthdr.l3hlen > sizeof(*ip))
copy_to_txd(&txq->eq, (caddr_t)(ip + 1), &out,
m->m_pkthdr.l3hlen - sizeof(*ip));
} else {
ip6 = (void *)((char *)eh + m->m_pkthdr.l2hlen);
newip6 = *ip6;
newip6.ip6_plen = htons(pktlen - m->m_pkthdr.l2hlen);
copy_to_txd(&txq->eq, (caddr_t)&newip6, &out, sizeof(newip6));
MPASS(m->m_pkthdr.l3hlen == sizeof(*ip6));
}
/* Clear PUSH and FIN in the TCP header if present. */
tcp = (void *)((char *)eh + m->m_pkthdr.l2hlen + m->m_pkthdr.l3hlen);
newtcp = *tcp;
newtcp.th_flags &= ~(TH_PUSH | TH_FIN);
copy_to_txd(&txq->eq, (caddr_t)&newtcp, &out, sizeof(newtcp));
/* Copy rest of packet. */
copy_to_txd(&txq->eq, (caddr_t)(tcp + 1), &out, pktlen -
(m->m_pkthdr.l2hlen + m->m_pkthdr.l3hlen + sizeof(*tcp)));
txq->imm_wrs++;
txq->txpkt_wrs++;
txq->kern_tls_options++;
txsd = &txq->sdesc[pidx];
txsd->m = NULL;
txsd->desc_used = ndesc;
return (ndesc);
}
static int
ktls_write_tunnel_packet(struct sge_txq *txq, void *dst, struct mbuf *m,
struct mbuf *m_tls, u_int available, tcp_seq tcp_seqno, u_int pidx)
{
struct tx_sdesc *txsd;
struct fw_eth_tx_pkt_wr *wr;
struct cpl_tx_pkt_core *cpl;
uint32_t ctrl;
uint64_t ctrl1;
int len16, ndesc, pktlen;
struct ether_header *eh;
struct ip *ip, newip;
struct ip6_hdr *ip6, newip6;
struct tcphdr *tcp, newtcp;
struct mbuf_ext_pgs *ext_pgs;
caddr_t out;
TXQ_LOCK_ASSERT_OWNED(txq);
M_ASSERTPKTHDR(m);
/* Locate the template TLS header. */
MBUF_EXT_PGS_ASSERT(m_tls);
ext_pgs = m_tls->m_ext.ext_pgs;
/* This should always be the last TLS record in a chain. */
MPASS(m_tls->m_next == NULL);
wr = dst;
pktlen = m->m_len + m_tls->m_len;
ctrl = sizeof(struct cpl_tx_pkt_core) + pktlen;
len16 = howmany(sizeof(struct fw_eth_tx_pkt_wr) + ctrl, 16);
ndesc = howmany(len16, EQ_ESIZE / 16);
MPASS(ndesc <= available);
/* Firmware work request header */
wr->op_immdlen = htobe32(V_FW_WR_OP(FW_ETH_TX_PKT_WR) |
V_FW_ETH_TX_PKT_WR_IMMDLEN(ctrl));
ctrl = V_FW_WR_LEN16(len16);
wr->equiq_to_len16 = htobe32(ctrl);
wr->r3 = 0;
cpl = (void *)(wr + 1);
/* Checksum offload */
ctrl1 = 0;
txq->txcsum++;
/* CPL header */
cpl->ctrl0 = txq->cpl_ctrl0;
cpl->pack = 0;
cpl->len = htobe16(pktlen);
cpl->ctrl1 = htobe64(ctrl1);
out = (void *)(cpl + 1);
/* Copy over Ethernet header. */
eh = mtod(m, struct ether_header *);
copy_to_txd(&txq->eq, (caddr_t)eh, &out, m->m_pkthdr.l2hlen);
/* Fixup length in IP header and copy out. */
if (ntohs(eh->ether_type) == ETHERTYPE_IP) {
ip = (void *)((char *)eh + m->m_pkthdr.l2hlen);
newip = *ip;
newip.ip_len = htons(pktlen - m->m_pkthdr.l2hlen);
copy_to_txd(&txq->eq, (caddr_t)&newip, &out, sizeof(newip));
if (m->m_pkthdr.l3hlen > sizeof(*ip))
copy_to_txd(&txq->eq, (caddr_t)(ip + 1), &out,
m->m_pkthdr.l3hlen - sizeof(*ip));
} else {
ip6 = (void *)((char *)eh + m->m_pkthdr.l2hlen);
newip6 = *ip6;
newip6.ip6_plen = htons(pktlen - m->m_pkthdr.l2hlen);
copy_to_txd(&txq->eq, (caddr_t)&newip6, &out, sizeof(newip6));
MPASS(m->m_pkthdr.l3hlen == sizeof(*ip6));
}
/* Set sequence number in TCP header. */
tcp = (void *)((char *)eh + m->m_pkthdr.l2hlen + m->m_pkthdr.l3hlen);
newtcp = *tcp;
newtcp.th_seq = htonl(tcp_seqno + mtod(m_tls, vm_offset_t));
copy_to_txd(&txq->eq, (caddr_t)&newtcp, &out, sizeof(newtcp));
/* Copy rest of TCP header. */
copy_to_txd(&txq->eq, (caddr_t)(tcp + 1), &out, m->m_len -
(m->m_pkthdr.l2hlen + m->m_pkthdr.l3hlen + sizeof(*tcp)));
/* Copy the subset of the TLS header requested. */
copy_to_txd(&txq->eq, (char *)ext_pgs->hdr + mtod(m_tls, vm_offset_t),
&out, m_tls->m_len);
txq->imm_wrs++;
txq->txpkt_wrs++;
txq->kern_tls_header++;
txsd = &txq->sdesc[pidx];
txsd->m = m;
txsd->desc_used = ndesc;
return (ndesc);
}
_Static_assert(sizeof(struct cpl_set_tcb_field) <= EQ_ESIZE,
"CPL_SET_TCB_FIELD must be smaller than a single TX descriptor");
_Static_assert(W_TCB_SND_UNA_RAW == W_TCB_SND_NXT_RAW,
"SND_NXT_RAW and SND_UNA_RAW are in different words");
static int
ktls_write_tls_wr(struct tlspcb *tlsp, struct sge_txq *txq,
void *dst, struct mbuf *m, struct tcphdr *tcp, struct mbuf *m_tls,
u_int nsegs, u_int available, tcp_seq tcp_seqno, uint32_t *tsopt,
u_int pidx, bool set_l2t_idx)
{
struct sge_eq *eq = &txq->eq;
struct tx_sdesc *txsd;
struct fw_ulptx_wr *wr;
struct ulp_txpkt *txpkt;
struct ulptx_sc_memrd *memrd;
struct ulptx_idata *idata;
struct cpl_tx_sec_pdu *sec_pdu;
struct cpl_tx_data *tx_data;
struct mbuf_ext_pgs *ext_pgs;
struct tls_record_layer *hdr;
char *iv, *out;
u_int aad_start, aad_stop;
u_int auth_start, auth_stop, auth_insert;
u_int cipher_start, cipher_stop, iv_offset;
u_int imm_len, mss, ndesc, offset, plen, tlen, twr_len, wr_len;
u_int fields, tx_max_offset, tx_max;
bool first_wr, last_wr, using_scratch;
ndesc = 0;
MPASS(tlsp->txq == txq);
first_wr = (tlsp->prev_seq == 0 && tlsp->prev_ack == 0 &&
tlsp->prev_win == 0);
/*
* Use the per-txq scratch pad if near the end of the ring to
* simplify handling of wrap-around. This uses a simple but
* not quite perfect test of using the scratch buffer if we
* can't fit a maximal work request in without wrapping.
*/
using_scratch = (eq->sidx - pidx < SGE_MAX_WR_LEN / EQ_ESIZE);
/* Locate the TLS header. */
MBUF_EXT_PGS_ASSERT(m_tls);
ext_pgs = m_tls->m_ext.ext_pgs;
hdr = (void *)ext_pgs->hdr;
plen = TLS_HEADER_LENGTH + ntohs(hdr->tls_length) - ext_pgs->trail_len;
/* Determine how much of the TLS record to send. */
tlen = ktls_tcp_payload_length(tlsp, m_tls);
if (tlen <= ext_pgs->hdr_len) {
/*
* For requests that only want to send the TLS header,
* send a tunnelled packet as immediate data.
*/
#ifdef VERBOSE_TRACES
CTR3(KTR_CXGBE, "%s: tid %d header-only TLS record %u",
__func__, tlsp->tid, (u_int)ext_pgs->seqno);
#endif
return (ktls_write_tunnel_packet(txq, dst, m, m_tls, available,
tcp_seqno, pidx));
}
if (tlen < plen) {
plen = tlen;
offset = ktls_payload_offset(tlsp, m_tls);
#ifdef VERBOSE_TRACES
CTR4(KTR_CXGBE, "%s: tid %d short TLS record %u with offset %u",
__func__, tlsp->tid, (u_int)ext_pgs->seqno, offset);
#endif
if (m_tls->m_next == NULL && (tcp->th_flags & TH_FIN) != 0) {
txq->kern_tls_fin_short++;
#ifdef INVARIANTS
panic("%s: FIN on short TLS record", __func__);
#endif
}
} else
offset = 0;
/*
* This is the last work request for a given TLS mbuf chain if
* it is the last mbuf in the chain and FIN is not set. If
* FIN is set, then ktls_write_tcp_fin() will write out the
* last work request.
*/
last_wr = m_tls->m_next == NULL && (tcp->th_flags & TH_FIN) == 0;
/*
* The host stack may ask us to not send part of the start of
* a TLS record. (For example, the stack might have
* previously sent a "short" TLS record and might later send
* down an mbuf that requests to send the remainder of the TLS
* record.) The crypto engine must process a TLS record from
* the beginning if computing a GCM tag or HMAC, so we always
* send the TLS record from the beginning as input to the
* crypto engine and via CPL_TX_DATA to TP. However, TP will
* drop individual packets after they have been chopped up
* into MSS-sized chunks if the entire sequence range of those
* packets is less than SND_UNA. SND_UNA is computed as
* TX_MAX - SND_UNA_RAW. Thus, use the offset stored in
* m_data to set TX_MAX to the first byte in the TCP sequence
* space the host actually wants us to send and set
* SND_UNA_RAW to 0.
*
* If the host sends us back to back requests that span the
* trailer of a single TLS record (first request ends "in" the
* trailer and second request starts at the next byte but
* still "in" the trailer), the initial bytes of the trailer
* that the first request drops will not be retransmitted. If
* the host uses the same requests when retransmitting the
* connection will hang. To handle this, always transmit the
* full trailer for a request that begins "in" the trailer
* (the second request in the example above). This should
* also help to avoid retransmits for the common case.
*
* A similar condition exists when using CBC for back to back
* requests that span a single AES block. The first request
* will be truncated to end at the end of the previous AES
* block. To handle this, always begin transmission at the
* start of the current AES block.
*/
tx_max_offset = mtod(m_tls, vm_offset_t);
if (tx_max_offset > TLS_HEADER_LENGTH + ntohs(hdr->tls_length) -
ext_pgs->trail_len) {
/* Always send the full trailer. */
tx_max_offset = TLS_HEADER_LENGTH + ntohs(hdr->tls_length) -
ext_pgs->trail_len;
}
if (tlsp->enc_mode == SCMD_CIPH_MODE_AES_CBC &&
tx_max_offset > TLS_HEADER_LENGTH) {
/* Always send all of the first AES block. */
tx_max_offset = TLS_HEADER_LENGTH +
rounddown(tx_max_offset - TLS_HEADER_LENGTH,
AES_BLOCK_LEN);
}
tx_max = tcp_seqno + tx_max_offset;
/*
* Update TCB fields. Reserve space for the FW_ULPTX_WR header
* but don't populate it until we know how many field updates
* are required.
*/
if (using_scratch)
wr = (void *)txq->ss;
else
wr = dst;
out = (void *)(wr + 1);
fields = 0;
if (set_l2t_idx) {
KASSERT(nsegs != 0,
("trying to set L2T_IX for subsequent TLS WR"));
#ifdef VERBOSE_TRACES
CTR3(KTR_CXGBE, "%s: tid %d set L2T_IX to %d", __func__,
tlsp->tid, tlsp->l2te->idx);
#endif
write_set_tcb_field_ulp(tlsp, out, txq, W_TCB_L2T_IX,
V_TCB_L2T_IX(M_TCB_L2T_IX), V_TCB_L2T_IX(tlsp->l2te->idx));
out += roundup2(LEN__SET_TCB_FIELD_ULP, 16);
fields++;
}
if (tsopt != NULL && tlsp->prev_tsecr != ntohl(tsopt[1])) {
KASSERT(nsegs != 0,
("trying to set T_RTSEQ_RECENT for subsequent TLS WR"));
#ifdef VERBOSE_TRACES
CTR2(KTR_CXGBE, "%s: tid %d wrote updated T_RTSEQ_RECENT",
__func__, tlsp->tid);
#endif
write_set_tcb_field_ulp(tlsp, out, txq, W_TCB_T_RTSEQ_RECENT,
V_TCB_T_RTSEQ_RECENT(M_TCB_T_RTSEQ_RECENT),
V_TCB_T_RTSEQ_RECENT(ntohl(tsopt[1])));
out += roundup2(LEN__SET_TCB_FIELD_ULP, 16);
fields++;
tlsp->prev_tsecr = ntohl(tsopt[1]);
}
if (first_wr || tlsp->prev_seq != tx_max) {
KASSERT(nsegs != 0,
("trying to set TX_MAX for subsequent TLS WR"));
#ifdef VERBOSE_TRACES
CTR4(KTR_CXGBE,
"%s: tid %d setting TX_MAX to %u (tcp_seqno %u)",
__func__, tlsp->tid, tx_max, tcp_seqno);
#endif
write_set_tcb_field_ulp(tlsp, out, txq, W_TCB_TX_MAX,
V_TCB_TX_MAX(M_TCB_TX_MAX), V_TCB_TX_MAX(tx_max));
out += roundup2(LEN__SET_TCB_FIELD_ULP, 16);
fields++;
}
/*
* If there is data to drop at the beginning of this TLS
* record or if this is a retransmit,
* reset SND_UNA_RAW to 0 so that SND_UNA == TX_MAX.
*/
if (tlsp->prev_seq != tx_max || mtod(m_tls, vm_offset_t) != 0) {
KASSERT(nsegs != 0,
("trying to clear SND_UNA_RAW for subsequent TLS WR"));
#ifdef VERBOSE_TRACES
CTR2(KTR_CXGBE, "%s: tid %d clearing SND_UNA_RAW", __func__,
tlsp->tid);
#endif
write_set_tcb_field_ulp(tlsp, out, txq, W_TCB_SND_UNA_RAW,
V_TCB_SND_UNA_RAW(M_TCB_SND_UNA_RAW),
V_TCB_SND_UNA_RAW(0));
out += roundup2(LEN__SET_TCB_FIELD_ULP, 16);
fields++;
}
/*
* Store the expected sequence number of the next byte after
* this record.
*/
tlsp->prev_seq = tcp_seqno + tlen;
if (first_wr || tlsp->prev_ack != ntohl(tcp->th_ack)) {
KASSERT(nsegs != 0,
("trying to set RCV_NXT for subsequent TLS WR"));
write_set_tcb_field_ulp(tlsp, out, txq, W_TCB_RCV_NXT,
V_TCB_RCV_NXT(M_TCB_RCV_NXT),
V_TCB_RCV_NXT(ntohl(tcp->th_ack)));
out += roundup2(LEN__SET_TCB_FIELD_ULP, 16);
fields++;
tlsp->prev_ack = ntohl(tcp->th_ack);
}
if (first_wr || tlsp->prev_win != ntohs(tcp->th_win)) {
KASSERT(nsegs != 0,
("trying to set RCV_WND for subsequent TLS WR"));
write_set_tcb_field_ulp(tlsp, out, txq, W_TCB_RCV_WND,
V_TCB_RCV_WND(M_TCB_RCV_WND),
V_TCB_RCV_WND(ntohs(tcp->th_win)));
out += roundup2(LEN__SET_TCB_FIELD_ULP, 16);
fields++;
tlsp->prev_win = ntohs(tcp->th_win);
}
/* Recalculate 'nsegs' if cached value is not available. */
if (nsegs == 0)
nsegs = sglist_count_ext_pgs(ext_pgs, ext_pgs->hdr_len +
offset, plen - (ext_pgs->hdr_len + offset));
/* Calculate the size of the TLS work request. */
twr_len = ktls_base_wr_size(tlsp);
imm_len = 0;
if (offset == 0)
imm_len += ext_pgs->hdr_len;
if (plen == tlen)
imm_len += AES_BLOCK_LEN;
twr_len += roundup2(imm_len, 16);
twr_len += ktls_sgl_size(nsegs);
/*
* If any field updates were required, determine if they can
* be included in the TLS work request. If not, use the
* FW_ULPTX_WR work request header at 'wr' as a dedicated work
* request for the field updates and start a new work request
* for the TLS work request afterward.
*/
if (fields != 0) {
wr_len = fields * roundup2(LEN__SET_TCB_FIELD_ULP, 16);
if (twr_len + wr_len <= SGE_MAX_WR_LEN &&
tlsp->sc->tlst.combo_wrs) {
wr_len += twr_len;
txpkt = (void *)out;
} else {
wr_len += sizeof(*wr);
wr->op_to_compl = htobe32(V_FW_WR_OP(FW_ULPTX_WR));
wr->flowid_len16 = htobe32(F_FW_ULPTX_WR_DATA |
V_FW_WR_LEN16(wr_len / 16));
wr->cookie = 0;
/*
* If we were using scratch space, copy the
* field updates work request to the ring.
*/
if (using_scratch) {
out = dst;
copy_to_txd(eq, txq->ss, &out, wr_len);
}
ndesc = howmany(wr_len, EQ_ESIZE);
MPASS(ndesc <= available);
txq->raw_wrs++;
txsd = &txq->sdesc[pidx];
txsd->m = NULL;
txsd->desc_used = ndesc;
IDXINCR(pidx, ndesc, eq->sidx);
dst = &eq->desc[pidx];
/*
* Determine if we should use scratch space
* for the TLS work request based on the
* available space after advancing pidx for
* the field updates work request.
*/
wr_len = twr_len;
using_scratch = (eq->sidx - pidx <
howmany(wr_len, EQ_ESIZE));
if (using_scratch)
wr = (void *)txq->ss;
else
wr = dst;
txpkt = (void *)(wr + 1);
}
} else {
wr_len = twr_len;
txpkt = (void *)out;
}
wr_len = roundup2(wr_len, 16);
MPASS(ndesc + howmany(wr_len, EQ_ESIZE) <= available);
/* FW_ULPTX_WR */
wr->op_to_compl = htobe32(V_FW_WR_OP(FW_ULPTX_WR));
wr->flowid_len16 = htobe32(F_FW_ULPTX_WR_DATA |
V_FW_WR_LEN16(wr_len / 16));
wr->cookie = 0;
/* ULP_TXPKT */
txpkt->cmd_dest = htobe32(V_ULPTX_CMD(ULP_TX_PKT) |
V_ULP_TXPKT_DATAMODIFY(0) |
V_ULP_TXPKT_CHANNELID(tlsp->vi->pi->port_id) | V_ULP_TXPKT_DEST(0) |
V_ULP_TXPKT_FID(txq->eq.cntxt_id) | V_ULP_TXPKT_RO(1));
txpkt->len = htobe32(howmany(twr_len - sizeof(*wr), 16));
/* ULPTX_IDATA sub-command */
idata = (void *)(txpkt + 1);
idata->cmd_more = htobe32(V_ULPTX_CMD(ULP_TX_SC_IMM) |
V_ULP_TX_SC_MORE(1));
idata->len = sizeof(struct cpl_tx_sec_pdu);
/*
* The key context, CPL_TX_DATA, and immediate data are part
* of this ULPTX_IDATA when using an inline key. When reading
* the key from memory, the CPL_TX_DATA and immediate data are
* part of a separate ULPTX_IDATA.
*/
if (tlsp->inline_key)
idata->len += tlsp->tx_key_info_size +
sizeof(struct cpl_tx_data) + imm_len;
idata->len = htobe32(idata->len);
/* CPL_TX_SEC_PDU */
sec_pdu = (void *)(idata + 1);
/*
* For short records, AAD is counted as header data in SCMD0,
* the IV is next followed by a cipher region for the payload.
*/
if (plen == tlen) {
aad_start = 0;
aad_stop = 0;
iv_offset = 1;
auth_start = 0;
auth_stop = 0;
auth_insert = 0;
cipher_start = AES_BLOCK_LEN + 1;
cipher_stop = 0;
sec_pdu->pldlen = htobe32(16 + plen -
(ext_pgs->hdr_len + offset));
/* These two flits are actually a CPL_TLS_TX_SCMD_FMT. */
sec_pdu->seqno_numivs = tlsp->scmd0_short.seqno_numivs;
sec_pdu->ivgen_hdrlen = htobe32(
tlsp->scmd0_short.ivgen_hdrlen |
V_SCMD_HDR_LEN(offset == 0 ? ext_pgs->hdr_len : 0));
txq->kern_tls_short++;
} else {
/*
* AAD is TLS header. IV is after AAD. The cipher region
* starts after the IV. See comments in ccr_authenc() and
* ccr_gmac() in t4_crypto.c regarding cipher and auth
* start/stop values.
*/
aad_start = 1;
aad_stop = TLS_HEADER_LENGTH;
iv_offset = TLS_HEADER_LENGTH + 1;
cipher_start = ext_pgs->hdr_len + 1;
if (tlsp->enc_mode == SCMD_CIPH_MODE_AES_GCM) {
cipher_stop = 0;
auth_start = cipher_start;
auth_stop = 0;
auth_insert = 0;
} else {
cipher_stop = 0;
auth_start = cipher_start;
auth_stop = 0;
auth_insert = 0;
}
sec_pdu->pldlen = htobe32(plen);
/* These two flits are actually a CPL_TLS_TX_SCMD_FMT. */
sec_pdu->seqno_numivs = tlsp->scmd0.seqno_numivs;
sec_pdu->ivgen_hdrlen = tlsp->scmd0.ivgen_hdrlen;
if (mtod(m_tls, vm_offset_t) == 0)
txq->kern_tls_full++;
else
txq->kern_tls_partial++;
}
sec_pdu->op_ivinsrtofst = htobe32(
V_CPL_TX_SEC_PDU_OPCODE(CPL_TX_SEC_PDU) |
V_CPL_TX_SEC_PDU_CPLLEN(2) | V_CPL_TX_SEC_PDU_PLACEHOLDER(0) |
V_CPL_TX_SEC_PDU_IVINSRTOFST(iv_offset));
sec_pdu->aadstart_cipherstop_hi = htobe32(
V_CPL_TX_SEC_PDU_AADSTART(aad_start) |
V_CPL_TX_SEC_PDU_AADSTOP(aad_stop) |
V_CPL_TX_SEC_PDU_CIPHERSTART(cipher_start) |
V_CPL_TX_SEC_PDU_CIPHERSTOP_HI(cipher_stop >> 4));
sec_pdu->cipherstop_lo_authinsert = htobe32(
V_CPL_TX_SEC_PDU_CIPHERSTOP_LO(cipher_stop & 0xf) |
V_CPL_TX_SEC_PDU_AUTHSTART(auth_start) |
V_CPL_TX_SEC_PDU_AUTHSTOP(auth_stop) |
V_CPL_TX_SEC_PDU_AUTHINSERT(auth_insert));
sec_pdu->scmd1 = htobe64(ext_pgs->seqno);
/* Key context */
out = (void *)(sec_pdu + 1);
if (tlsp->inline_key) {
memcpy(out, &tlsp->keyctx, tlsp->tx_key_info_size);
out += tlsp->tx_key_info_size;
} else {
/* ULPTX_SC_MEMRD to read key context. */
memrd = (void *)out;
memrd->cmd_to_len = htobe32(V_ULPTX_CMD(ULP_TX_SC_MEMRD) |
V_ULP_TX_SC_MORE(1) |
V_ULPTX_LEN16(tlsp->tx_key_info_size >> 4));
memrd->addr = htobe32(tlsp->tx_key_addr >> 5);
/* ULPTX_IDATA for CPL_TX_DATA and TLS header. */
idata = (void *)(memrd + 1);
idata->cmd_more = htobe32(V_ULPTX_CMD(ULP_TX_SC_IMM) |
V_ULP_TX_SC_MORE(1));
idata->len = htobe32(sizeof(struct cpl_tx_data) + imm_len);
out = (void *)(idata + 1);
}
/* CPL_TX_DATA */
tx_data = (void *)out;
OPCODE_TID(tx_data) = htonl(MK_OPCODE_TID(CPL_TX_DATA, tlsp->tid));
if (m->m_pkthdr.csum_flags & CSUM_TSO) {
mss = m->m_pkthdr.tso_segsz;
tlsp->prev_mss = mss;
} else if (tlsp->prev_mss != 0)
mss = tlsp->prev_mss;
else
mss = tlsp->vi->ifp->if_mtu -
(m->m_pkthdr.l3hlen + m->m_pkthdr.l4hlen);
if (offset == 0) {
tx_data->len = htobe32(V_TX_DATA_MSS(mss) | V_TX_LENGTH(tlen));
tx_data->rsvd = htobe32(tcp_seqno);
} else {
tx_data->len = htobe32(V_TX_DATA_MSS(mss) |
V_TX_LENGTH(tlen - (ext_pgs->hdr_len + offset)));
tx_data->rsvd = htobe32(tcp_seqno + ext_pgs->hdr_len + offset);
}
tx_data->flags = htobe32(F_TX_BYPASS);
if (last_wr && tcp->th_flags & TH_PUSH)
tx_data->flags |= htobe32(F_TX_PUSH | F_TX_SHOVE);
/* Populate the TLS header */
out = (void *)(tx_data + 1);
if (offset == 0) {
memcpy(out, ext_pgs->hdr, ext_pgs->hdr_len);
out += ext_pgs->hdr_len;
}
/* AES IV for a short record. */
if (plen == tlen) {
iv = out;
if (tlsp->enc_mode == SCMD_CIPH_MODE_AES_GCM) {
memcpy(iv, tlsp->keyctx.txhdr.txsalt, SALT_SIZE);
memcpy(iv + 4, hdr + 1, 8);
*(uint32_t *)(iv + 12) = htobe32(2 +
offset / AES_BLOCK_LEN);
} else
memcpy(iv, hdr + 1, AES_BLOCK_LEN);
out += AES_BLOCK_LEN;
}
if (imm_len % 16 != 0) {
/* Zero pad to an 8-byte boundary. */
memset(out, 0, 8 - (imm_len % 8));
out += 8 - (imm_len % 8);
/*
* Insert a ULP_TX_SC_NOOP if needed so the SGL is
* 16-byte aligned.
*/
if (imm_len % 16 <= 8) {
idata = (void *)out;
idata->cmd_more = htobe32(V_ULPTX_CMD(ULP_TX_SC_NOOP));
idata->len = htobe32(0);
out = (void *)(idata + 1);
}
}
/* SGL for record payload */
sglist_reset(txq->gl);
if (sglist_append_ext_pgs(txq->gl, ext_pgs, ext_pgs->hdr_len + offset,
plen - (ext_pgs->hdr_len + offset)) != 0) {
#ifdef INVARIANTS
panic("%s: failed to append sglist", __func__);
#endif
}
write_gl_to_buf(txq->gl, out);
if (using_scratch) {
out = dst;
copy_to_txd(eq, txq->ss, &out, wr_len);
}
ndesc += howmany(wr_len, EQ_ESIZE);
MPASS(ndesc <= available);
txq->tls_wrs++;
txq->kern_tls_records++;
txq->kern_tls_octets += tlen - mtod(m_tls, vm_offset_t);
if (mtod(m_tls, vm_offset_t) != 0) {
if (offset == 0)
txq->kern_tls_waste += mtod(m_tls, vm_offset_t);
else
txq->kern_tls_waste += mtod(m_tls, vm_offset_t) -
(ext_pgs->hdr_len + offset);
}
txsd = &txq->sdesc[pidx];
if (last_wr)
txsd->m = m;
else
txsd->m = NULL;
txsd->desc_used = howmany(wr_len, EQ_ESIZE);
return (ndesc);
}
static int
ktls_write_tcp_fin(struct sge_txq *txq, void *dst, struct mbuf *m,
u_int available, tcp_seq tcp_seqno, u_int pidx)
{
struct tx_sdesc *txsd;
struct fw_eth_tx_pkt_wr *wr;
struct cpl_tx_pkt_core *cpl;
uint32_t ctrl;
uint64_t ctrl1;
int len16, ndesc, pktlen;
struct ether_header *eh;
struct ip *ip, newip;
struct ip6_hdr *ip6, newip6;
struct tcphdr *tcp, newtcp;
caddr_t out;
TXQ_LOCK_ASSERT_OWNED(txq);
M_ASSERTPKTHDR(m);
wr = dst;
pktlen = m->m_len;
ctrl = sizeof(struct cpl_tx_pkt_core) + pktlen;
len16 = howmany(sizeof(struct fw_eth_tx_pkt_wr) + ctrl, 16);
ndesc = howmany(len16, EQ_ESIZE / 16);
MPASS(ndesc <= available);
/* Firmware work request header */
wr->op_immdlen = htobe32(V_FW_WR_OP(FW_ETH_TX_PKT_WR) |
V_FW_ETH_TX_PKT_WR_IMMDLEN(ctrl));
ctrl = V_FW_WR_LEN16(len16);
wr->equiq_to_len16 = htobe32(ctrl);
wr->r3 = 0;
cpl = (void *)(wr + 1);
/* Checksum offload */
ctrl1 = 0;
txq->txcsum++;
/* CPL header */
cpl->ctrl0 = txq->cpl_ctrl0;
cpl->pack = 0;
cpl->len = htobe16(pktlen);
cpl->ctrl1 = htobe64(ctrl1);
out = (void *)(cpl + 1);
/* Copy over Ethernet header. */
eh = mtod(m, struct ether_header *);
copy_to_txd(&txq->eq, (caddr_t)eh, &out, m->m_pkthdr.l2hlen);
/* Fixup length in IP header and copy out. */
if (ntohs(eh->ether_type) == ETHERTYPE_IP) {
ip = (void *)((char *)eh + m->m_pkthdr.l2hlen);
newip = *ip;
newip.ip_len = htons(pktlen - m->m_pkthdr.l2hlen);
copy_to_txd(&txq->eq, (caddr_t)&newip, &out, sizeof(newip));
if (m->m_pkthdr.l3hlen > sizeof(*ip))
copy_to_txd(&txq->eq, (caddr_t)(ip + 1), &out,
m->m_pkthdr.l3hlen - sizeof(*ip));
} else {
ip6 = (void *)((char *)eh + m->m_pkthdr.l2hlen);
newip6 = *ip6;
newip6.ip6_plen = htons(pktlen - m->m_pkthdr.l2hlen);
copy_to_txd(&txq->eq, (caddr_t)&newip6, &out, sizeof(newip6));
MPASS(m->m_pkthdr.l3hlen == sizeof(*ip6));
}
/* Set sequence number in TCP header. */
tcp = (void *)((char *)eh + m->m_pkthdr.l2hlen + m->m_pkthdr.l3hlen);
newtcp = *tcp;
newtcp.th_seq = htonl(tcp_seqno);
copy_to_txd(&txq->eq, (caddr_t)&newtcp, &out, sizeof(newtcp));
/* Copy rest of packet. */
copy_to_txd(&txq->eq, (caddr_t)(tcp + 1), &out, m->m_len -
(m->m_pkthdr.l2hlen + m->m_pkthdr.l3hlen + sizeof(*tcp)));
txq->imm_wrs++;
txq->txpkt_wrs++;
txq->kern_tls_fin++;
txsd = &txq->sdesc[pidx];
txsd->m = m;
txsd->desc_used = ndesc;
return (ndesc);
}
int
t6_ktls_write_wr(struct sge_txq *txq, void *dst, struct mbuf *m, u_int nsegs,
u_int available)
{
struct sge_eq *eq = &txq->eq;
struct tx_sdesc *txsd;
struct tlspcb *tlsp;
struct tcphdr *tcp;
struct mbuf *m_tls;
struct ether_header *eh;
tcp_seq tcp_seqno;
u_int ndesc, pidx, totdesc;
uint16_t vlan_tag;
bool has_fin, set_l2t_idx;
void *tsopt;
M_ASSERTPKTHDR(m);
MPASS(m->m_pkthdr.snd_tag != NULL);
tlsp = mst_to_tls(m->m_pkthdr.snd_tag);
totdesc = 0;
eh = mtod(m, struct ether_header *);
tcp = (struct tcphdr *)((char *)eh + m->m_pkthdr.l2hlen +
m->m_pkthdr.l3hlen);
pidx = eq->pidx;
has_fin = (tcp->th_flags & TH_FIN) != 0;
/*
* If this TLS record has a FIN, then we will send any
* requested options as part of the FIN packet.
*/
if (!has_fin && ktls_has_tcp_options(tcp)) {
ndesc = ktls_write_tcp_options(txq, dst, m, available, pidx);
totdesc += ndesc;
IDXINCR(pidx, ndesc, eq->sidx);
dst = &eq->desc[pidx];
#ifdef VERBOSE_TRACES
CTR2(KTR_CXGBE, "%s: tid %d wrote TCP options packet", __func__,
tlsp->tid);
#endif
}
/*
* Allocate a new L2T entry if necessary. This may write out
* a work request to the txq.
*/
if (m->m_flags & M_VLANTAG)
vlan_tag = m->m_pkthdr.ether_vtag;
else
vlan_tag = 0xfff;
set_l2t_idx = false;
if (tlsp->l2te == NULL || tlsp->l2te->vlan != vlan_tag ||
memcmp(tlsp->l2te->dmac, eh->ether_dhost, ETHER_ADDR_LEN) != 0) {
set_l2t_idx = true;
if (tlsp->l2te)
t4_l2t_release(tlsp->l2te);
tlsp->l2te = t4_l2t_alloc_tls(tlsp->sc, txq, dst, &ndesc,
vlan_tag, tlsp->vi->pi->lport, eh->ether_dhost);
if (tlsp->l2te == NULL)
CXGBE_UNIMPLEMENTED("failed to allocate TLS L2TE");
if (ndesc != 0) {
MPASS(ndesc <= available - totdesc);
txq->raw_wrs++;
txsd = &txq->sdesc[pidx];
txsd->m = NULL;
txsd->desc_used = ndesc;
totdesc += ndesc;
IDXINCR(pidx, ndesc, eq->sidx);
dst = &eq->desc[pidx];
}
}
/*
* Iterate over each TLS record constructing a work request
* for that record.
*/
for (m_tls = m->m_next; m_tls != NULL; m_tls = m_tls->m_next) {
MPASS(m_tls->m_flags & M_NOMAP);
/*
* Determine the initial TCP sequence number for this
* record.
*/
tsopt = NULL;
if (m_tls == m->m_next) {
tcp_seqno = ntohl(tcp->th_seq) -
mtod(m_tls, vm_offset_t);
if (tlsp->using_timestamps)
tsopt = ktls_find_tcp_timestamps(tcp);
} else {
MPASS(mtod(m_tls, vm_offset_t) == 0);
tcp_seqno = tlsp->prev_seq;
}
ndesc = ktls_write_tls_wr(tlsp, txq, dst, m, tcp, m_tls,
nsegs, available - totdesc, tcp_seqno, tsopt, pidx,
set_l2t_idx);
totdesc += ndesc;
IDXINCR(pidx, ndesc, eq->sidx);
dst = &eq->desc[pidx];
/*
* The value of nsegs from the header mbuf's metadata
* is only valid for the first TLS record.
*/
nsegs = 0;
/* Only need to set the L2T index once. */
set_l2t_idx = false;
}
if (has_fin) {
/*
* If the TCP header for this chain has FIN sent, then
* explicitly send a packet that has FIN set. This
* will also have PUSH set if requested. This assumes
* we sent at least one TLS record work request and
* uses the TCP sequence number after that reqeust as
* the sequence number for the FIN packet.
*/
ndesc = ktls_write_tcp_fin(txq, dst, m, available,
tlsp->prev_seq, pidx);
totdesc += ndesc;
}
MPASS(totdesc <= available);
return (totdesc);
}
void
cxgbe_tls_tag_free(struct m_snd_tag *mst)
{
struct adapter *sc;
struct tlspcb *tlsp;
tlsp = mst_to_tls(mst);
sc = tlsp->sc;
CTR2(KTR_CXGBE, "%s: tid %d", __func__, tlsp->tid);
if (tlsp->l2te)
t4_l2t_release(tlsp->l2te);
if (tlsp->tid >= 0)
release_tid(sc, tlsp->tid, tlsp->ctrlq);
if (tlsp->ce)
t4_release_lip(sc, tlsp->ce);
if (tlsp->tx_key_addr >= 0)
free_keyid(tlsp, tlsp->tx_key_addr);
explicit_bzero(&tlsp->keyctx, sizeof(&tlsp->keyctx));
free(tlsp, M_CXGBE);
}
void
t6_ktls_modload(void)
{
t4_register_shared_cpl_handler(CPL_ACT_OPEN_RPL, ktls_act_open_rpl,
CPL_COOKIE_KERN_TLS);
}
void
t6_ktls_modunload(void)
{
t4_register_shared_cpl_handler(CPL_ACT_OPEN_RPL, NULL,
CPL_COOKIE_KERN_TLS);
}
#else
int
cxgbe_tls_tag_alloc(struct ifnet *ifp, union if_snd_tag_alloc_params *params,
struct m_snd_tag **pt)
{
return (ENXIO);
}
int
t6_ktls_parse_pkt(struct mbuf *m, int *nsegsp, int *len16p)
{
return (EINVAL);
}
int
t6_ktls_write_wr(struct sge_txq *txq, void *dst, struct mbuf *m, u_int nsegs,
u_int available)
{
panic("can't happen");
}
void
cxgbe_tls_tag_free(struct m_snd_tag *mst)
{
panic("can't happen");
}
void
t6_ktls_modload(void)
{
}
void
t6_ktls_modunload(void)
{
}
#endif