From: Rohit Maheshwari <rohitm@chelsio.com>
Date: Sat, 7 Mar 2020 20:06:05 +0530
Subject: cxgb4/chcr: complete record tx handling
Patch-mainline: v5.7-rc1
Git-commit: 5a4b9fe7fece62ecab6fb28fe92362f83b41c33e
References: jsc#SLE-15131
Added tx handling in this patch. This includes handling of segments
contain single complete record.
v1->v2:
- chcr_write_cpl_set_tcb_ulp is added in this patch.
v3->v4:
- mss calculation logic.
- replaced kfree_skb with dev_kfree_skb_any.
- corrected error message reported by kbuild test robot <lkp@intel.com>
Signed-off-by: Rohit Maheshwari <rohitm@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
drivers/crypto/chelsio/chcr_common.h | 36 +
drivers/crypto/chelsio/chcr_core.c | 18
drivers/crypto/chelsio/chcr_core.h | 1
drivers/crypto/chelsio/chcr_ktls.c | 577 ++++++++++++++++++++++++++++
drivers/crypto/chelsio/chcr_ktls.h | 13
drivers/net/ethernet/chelsio/cxgb4/sge.c | 5
drivers/net/ethernet/chelsio/cxgb4/t4_msg.h | 20
drivers/net/ethernet/chelsio/cxgb4/t4_tcb.h | 20
8 files changed, 686 insertions(+), 4 deletions(-)
--- a/drivers/crypto/chelsio/chcr_common.h
+++ b/drivers/crypto/chelsio/chcr_common.h
@@ -9,6 +9,11 @@
#define CHCR_MAX_SALT 4
#define CHCR_KEYCTX_MAC_KEY_SIZE_128 0
#define CHCR_KEYCTX_CIPHER_KEY_SIZE_128 0
+#define CHCR_SCMD_CIPHER_MODE_AES_GCM 2
+#define CHCR_CPL_TX_SEC_PDU_LEN_64BIT 2
+#define CHCR_SCMD_SEQ_NO_CTRL_64BIT 3
+#define CHCR_SCMD_PROTO_VERSION_TLS 0
+#define CHCR_SCMD_AUTH_MODE_GHASH 4
enum chcr_state {
CHCR_INIT = 0,
@@ -93,4 +98,35 @@ static inline void *chcr_copy_to_txd(con
}
return p;
}
+
+static inline unsigned int chcr_txq_avail(const struct sge_txq *q)
+{
+ return q->size - 1 - q->in_use;
+}
+
+static inline void chcr_txq_advance(struct sge_txq *q, unsigned int n)
+{
+ q->in_use += n;
+ q->pidx += n;
+ if (q->pidx >= q->size)
+ q->pidx -= q->size;
+}
+
+static inline void chcr_eth_txq_stop(struct sge_eth_txq *q)
+{
+ netif_tx_stop_queue(q->txq);
+ q->q.stops++;
+}
+
+static inline unsigned int chcr_sgl_len(unsigned int n)
+{
+ n--;
+ return (3 * n) / 2 + (n & 1) + 2;
+}
+
+static inline unsigned int chcr_flits_to_desc(unsigned int n)
+{
+ WARN_ON(n > SGE_MAX_WR_LEN / 8);
+ return DIV_ROUND_UP(n, 8);
+}
#endif /* __CHCR_COMMON_H__ */
--- a/drivers/crypto/chelsio/chcr_core.c
+++ b/drivers/crypto/chelsio/chcr_core.c
@@ -49,9 +49,9 @@ static struct cxgb4_uld_info chcr_uld_in
.add = chcr_uld_add,
.state_change = chcr_uld_state_change,
.rx_handler = chcr_uld_rx_handler,
-#ifdef CONFIG_CHELSIO_IPSEC_INLINE
+#if defined(CONFIG_CHELSIO_IPSEC_INLINE) || defined(CONFIG_CHELSIO_TLS_DEVICE)
.tx_handler = chcr_uld_tx_handler,
-#endif /* CONFIG_CHELSIO_IPSEC_INLINE */
+#endif /* CONFIG_CHELSIO_IPSEC_INLINE || CONFIG_CHELSIO_TLS_DEVICE */
};
static void detach_work_fn(struct work_struct *work)
@@ -237,12 +237,22 @@ int chcr_uld_rx_handler(void *handle, co
return 0;
}
-#ifdef CONFIG_CHELSIO_IPSEC_INLINE
+#if defined(CONFIG_CHELSIO_IPSEC_INLINE) || defined(CONFIG_CHELSIO_TLS_DEVICE)
int chcr_uld_tx_handler(struct sk_buff *skb, struct net_device *dev)
{
+ /* In case if skb's decrypted bit is set, it's nic tls packet, else it's
+ * ipsec packet.
+ */
+#ifdef CONFIG_CHELSIO_TLS_DEVICE
+ if (skb->decrypted)
+ return chcr_ktls_xmit(skb, dev);
+#endif
+#ifdef CONFIG_CHELSIO_IPSEC_INLINE
return chcr_ipsec_xmit(skb, dev);
+#endif
+ return 0;
}
-#endif /* CONFIG_CHELSIO_IPSEC_INLINE */
+#endif /* CONFIG_CHELSIO_IPSEC_INLINE || CONFIG_CHELSIO_TLS_DEVICE */
static void chcr_detach_device(struct uld_ctx *u_ctx)
{
--- a/drivers/crypto/chelsio/chcr_core.h
+++ b/drivers/crypto/chelsio/chcr_core.h
@@ -227,5 +227,6 @@ void chcr_enable_ktls(struct adapter *ad
void chcr_disable_ktls(struct adapter *adap);
int chcr_ktls_cpl_act_open_rpl(struct adapter *adap, unsigned char *input);
int chcr_ktls_cpl_set_tcb_rpl(struct adapter *adap, unsigned char *input);
+int chcr_ktls_xmit(struct sk_buff *skb, struct net_device *dev);
#endif
#endif /* __CHCR_CORE_H__ */
--- a/drivers/crypto/chelsio/chcr_ktls.c
+++ b/drivers/crypto/chelsio/chcr_ktls.c
@@ -39,6 +39,22 @@ static int chcr_ktls_save_keys(struct ch
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;
+
break;
default:
@@ -373,6 +389,7 @@ static int chcr_ktls_dev_add(struct net_
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;
@@ -572,4 +589,564 @@ int chcr_ktls_cpl_set_tcb_rpl(struct ada
chcr_ktls_update_connection_state(tx_info, KTLS_CONN_SET_TCB_RPL);
return 0;
}
+
+/*
+ * 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)
+{
+ struct cpl_set_tcb_field_core *cpl;
+ struct ulptx_idata *idata;
+ struct ulp_txpkt *txpkt;
+ void *save_pos = NULL;
+ u8 buf[48] = {0};
+ int left;
+
+ left = (void *)q->q.stat - pos;
+ if (unlikely(left < CHCR_SET_TCB_FIELD_LEN)) {
+ if (!left) {
+ pos = q->q.desc;
+ } else {
+ save_pos = pos;
+ pos = buf;
+ }
+ }
+ /* ULP_TXPKT */
+ txpkt = pos;
+ txpkt->cmd_dest = htonl(ULPTX_CMD_V(ULP_TX_PKT) | ULP_TXPKT_DEST_V(0));
+ 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);
+
+ if (save_pos) {
+ pos = chcr_copy_to_txd(buf, &q->q, save_pos,
+ CHCR_SET_TCB_FIELD_LEN);
+ } else {
+ /* check again if we are at the end of the queue */
+ if (left == CHCR_SET_TCB_FIELD_LEN)
+ pos = q->q.desc;
+ else
+ pos = idata + 1;
+ }
+
+ 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 first_wr = ((tx_info->prev_ack == 0) && (tx_info->prev_win == 0));
+ u32 len, cpl = 0, ndesc, wr_len;
+ 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;
+ }
+
+ 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) {
+ /* reset snd_una */
+ 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);
+ 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(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_skb_copy
+ * @nskb - new skb where the frags to be added.
+ * @skb - old skb from which frags will be copied.
+ */
+static void chcr_ktls_skb_copy(struct sk_buff *skb, struct sk_buff *nskb)
+{
+ int i;
+
+ for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
+ skb_shinfo(nskb)->frags[i] = skb_shinfo(skb)->frags[i];
+ __skb_frag_ref(&skb_shinfo(nskb)->frags[i]);
+ }
+
+ skb_shinfo(nskb)->nr_frags = skb_shinfo(skb)->nr_frags;
+ nskb->len += skb->data_len;
+ nskb->data_len = skb->data_len;
+ nskb->truesize += skb->data_len;
+}
+
+/*
+ * 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(const struct sk_buff *skb, unsigned int key_ctx_len)
+{
+ return chcr_sgl_len(skb_shinfo(skb)->nr_frags) +
+ DIV_ROUND_UP(key_ctx_len + CHCR_KTLS_WR_SIZE, 8);
+}
+
+/*
+ * 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 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(skb, 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 vaues, 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;
+ }
+
+ 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(skb->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(skb->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_sgl(skb, &q->q, pos, end, skb->len - skb->data_len,
+ sgl_sdesc->addr);
+ sgl_sdesc->skb = skb;
+
+ chcr_txq_advance(&q->q, ndesc);
+ cxgb4_ring_tx_db(adap, &q->q, ndesc);
+
+ return 0;
+}
+
+/*
+ * 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 tls_end_offset, bool last_wr)
+{
+ struct sk_buff *nskb = NULL;
+ /* check if it is a complete record */
+ if (tls_end_offset == record->len) {
+ nskb = skb;
+ } else {
+ /* handle it in next patch */
+ goto out;
+ }
+
+ if (chcr_ktls_xmit_wr_complete(nskb, tx_info, q, tcp_seq,
+ (last_wr && tcp_push_no_fin),
+ mss)) {
+ goto out;
+ }
+ return 0;
+out:
+ if (nskb)
+ dev_kfree_skb_any(nskb);
+ return NETDEV_TX_BUSY;
+}
+
+/* nic tls TX handler */
+int chcr_ktls_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+ struct chcr_ktls_ofld_ctx_tx *tx_ctx;
+ struct tcphdr *th = tcp_hdr(skb);
+ int data_len, qidx, ret = 0, mss;
+ struct tls_record_info *record;
+ struct chcr_ktls_info *tx_info;
+ u32 tls_end_offset, tcp_seq;
+ struct tls_context *tls_ctx;
+ struct sk_buff *local_skb;
+ int new_connection_state;
+ struct sge_eth_txq *q;
+ struct adapter *adap;
+ unsigned long flags;
+
+ tcp_seq = ntohl(th->seq);
+
+ mss = skb_is_gso(skb) ? skb_shinfo(skb)->gso_size : skb->data_len;
+
+ /* check if we haven't set it for ktls offload */
+ if (!skb->sk || !tls_is_sk_tx_device_offloaded(skb->sk))
+ goto out;
+
+ tls_ctx = tls_get_ctx(skb->sk);
+ if (unlikely(tls_ctx->netdev != dev))
+ goto out;
+
+ tx_ctx = chcr_get_ktls_tx_context(tls_ctx);
+ tx_info = tx_ctx->chcr_info;
+
+ if (unlikely(!tx_info))
+ goto out;
+
+ /* check the connection state, we don't need to pass new connection
+ * state, state machine will check and update the new state if it is
+ * stuck due to responses not received from HW.
+ * Start the tx handling only if state is KTLS_CONN_TX_READY.
+ */
+ new_connection_state = chcr_ktls_update_connection_state(tx_info, 0);
+ if (new_connection_state != KTLS_CONN_TX_READY)
+ goto out;
+
+ /* don't touch the original skb, make a new skb to extract each records
+ * and send them separately.
+ */
+ local_skb = alloc_skb(0, GFP_KERNEL);
+
+ if (unlikely(!local_skb))
+ return NETDEV_TX_BUSY;
+
+ adap = tx_info->adap;
+ qidx = skb->queue_mapping;
+ q = &adap->sge.ethtxq[qidx + tx_info->first_qset];
+ cxgb4_reclaim_completed_tx(adap, &q->q, true);
+ /* update tcb */
+ ret = chcr_ktls_xmit_tcb_cpls(tx_info, q, ntohl(th->seq),
+ ntohl(th->ack_seq),
+ ntohs(th->window));
+ if (ret) {
+ dev_kfree_skb_any(local_skb);
+ return NETDEV_TX_BUSY;
+ }
+
+ /* copy skb contents into local skb */
+ chcr_ktls_skb_copy(skb, local_skb);
+
+ /* go through the skb and send only one record at a time. */
+ data_len = skb->data_len;
+ /* TCP segments can be in received from host either complete or partial.
+ * chcr_end_part_handler will handle cases if complete record or end
+ * part of the record is received. Incase of partial end part of record,
+ * we will send the complete record again.
+ */
+ do {
+ int i;
+
+ cxgb4_reclaim_completed_tx(adap, &q->q, true);
+ /* lock taken */
+ spin_lock_irqsave(&tx_ctx->base.lock, flags);
+ /* fetch the tls record */
+ record = tls_get_record(&tx_ctx->base, tcp_seq,
+ &tx_info->record_no);
+ /* By the time packet reached to us, ACK is received, and record
+ * won't be found in that case, handle it gracefully.
+ */
+ if (unlikely(!record)) {
+ spin_unlock_irqrestore(&tx_ctx->base.lock, flags);
+ goto out;
+ }
+
+ if (unlikely(tls_record_is_start_marker(record))) {
+ spin_unlock_irqrestore(&tx_ctx->base.lock, flags);
+ goto out;
+ }
+
+ /* increase page reference count of the record, so that there
+ * won't be any chance of page free in middle if in case stack
+ * receives ACK and try to delete the record.
+ */
+ for (i = 0; i < record->num_frags; i++)
+ __skb_frag_ref(&record->frags[i]);
+ /* lock cleared */
+ spin_unlock_irqrestore(&tx_ctx->base.lock, flags);
+
+ 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);
+ /* if a tls record is finishing in this SKB */
+ if (tls_end_offset <= data_len) {
+ struct sk_buff *nskb = NULL;
+
+ if (tls_end_offset < data_len) {
+ /* handle it later */
+ goto clear_ref;
+ } else {
+ /* its the only record in this skb, directly
+ * point it.
+ */
+ nskb = local_skb;
+ }
+ ret = chcr_end_part_handler(tx_info, nskb, record,
+ tcp_seq, mss,
+ (!th->fin && th->psh), q,
+ tls_end_offset,
+ (nskb == local_skb));
+
+ if (ret && nskb != local_skb)
+ dev_kfree_skb_any(local_skb);
+
+ data_len -= tls_end_offset;
+ /* tcp_seq increment is required to handle next record.
+ */
+ tcp_seq += tls_end_offset;
+ }
+clear_ref:
+ /* clear the frag ref count which increased locally before */
+ for (i = 0; i < record->num_frags; i++) {
+ /* clear the frag ref count */
+ __skb_frag_unref(&record->frags[i]);
+ }
+
+ if (ret)
+ goto out;
+
+ WARN_ON(data_len < 0);
+
+ } while (data_len > 0);
+
+ tx_info->prev_seq = ntohl(th->seq) + skb->data_len;
+out:
+ dev_kfree_skb_any(skb);
+ return NETDEV_TX_OK;
+}
#endif /* CONFIG_CHELSIO_TLS_DEVICE */
--- a/drivers/crypto/chelsio/chcr_ktls.h
+++ b/drivers/crypto/chelsio/chcr_ktls.h
@@ -15,6 +15,13 @@
#define CHCR_TCB_STATE_CLOSED 0
#define CHCR_KTLS_KEY_CTX_LEN 16
#define CHCR_SET_TCB_FIELD_LEN sizeof(struct cpl_set_tcb_field)
+#define CHCR_PLAIN_TX_DATA_LEN (sizeof(struct fw_ulptx_wr) +\
+ sizeof(struct ulp_txpkt) +\
+ sizeof(struct ulptx_idata) +\
+ sizeof(struct cpl_tx_data))
+
+#define CHCR_KTLS_WR_SIZE (CHCR_PLAIN_TX_DATA_LEN +\
+ sizeof(struct cpl_tx_sec_pdu))
enum chcr_ktls_conn_state {
KTLS_CONN_CLOSED,
@@ -39,14 +46,19 @@ struct chcr_ktls_info {
int rx_qid;
u32 iv_size;
u32 prev_seq;
+ u32 prev_ack;
u32 salt_size;
u32 key_ctx_len;
+ u32 scmd0_seqno_numivs;
+ u32 scmd0_ivgen_hdrlen;
u32 tcp_start_seq_number;
enum chcr_ktls_conn_state connection_state;
+ u16 prev_win;
u8 tx_chan;
u8 smt_idx;
u8 port_id;
u8 ip_family;
+ u8 first_qset;
};
struct chcr_ktls_ofld_ctx_tx {
@@ -78,5 +90,6 @@ void chcr_enable_ktls(struct adapter *ad
void chcr_disable_ktls(struct adapter *adap);
int chcr_ktls_cpl_act_open_rpl(struct adapter *adap, unsigned char *input);
int chcr_ktls_cpl_set_tcb_rpl(struct adapter *adap, unsigned char *input);
+int chcr_ktls_xmit(struct sk_buff *skb, struct net_device *dev);
#endif /* CONFIG_CHELSIO_TLS_DEVICE */
#endif /* __CHCR_KTLS_H__ */
--- a/drivers/net/ethernet/chelsio/cxgb4/sge.c
+++ b/drivers/net/ethernet/chelsio/cxgb4/sge.c
@@ -1418,6 +1418,11 @@ static netdev_tx_t cxgb4_eth_xmit(struct
return adap->uld[CXGB4_ULD_CRYPTO].tx_handler(skb, dev);
#endif /* CHELSIO_IPSEC_INLINE */
+#ifdef CONFIG_CHELSIO_TLS_DEVICE
+ if (skb->decrypted)
+ return adap->uld[CXGB4_ULD_CRYPTO].tx_handler(skb, dev);
+#endif /* CHELSIO_TLS_DEVICE */
+
qidx = skb_get_queue_mapping(skb);
if (ptp_enabled) {
spin_lock(&adap->ptp_lock);
--- a/drivers/net/ethernet/chelsio/cxgb4/t4_msg.h
+++ b/drivers/net/ethernet/chelsio/cxgb4/t4_msg.h
@@ -47,6 +47,7 @@ enum {
CPL_CLOSE_LISTSRV_REQ = 0x9,
CPL_ABORT_REQ = 0xA,
CPL_ABORT_RPL = 0xB,
+ CPL_TX_DATA = 0xC,
CPL_RX_DATA_ACK = 0xD,
CPL_TX_PKT = 0xE,
CPL_L2T_WRITE_REQ = 0x12,
@@ -1470,6 +1471,16 @@ struct cpl_tx_data {
#define TX_FORCE_S 13
#define TX_FORCE_V(x) ((x) << TX_FORCE_S)
+#define TX_DATA_MSS_S 16
+#define TX_DATA_MSS_M 0xFFFF
+#define TX_DATA_MSS_V(x) ((x) << TX_DATA_MSS_S)
+#define TX_DATA_MSS_G(x) (((x) >> TX_DATA_MSS_S) & TX_DATA_MSS_M)
+
+#define TX_LENGTH_S 0
+#define TX_LENGTH_M 0xFFFF
+#define TX_LENGTH_V(x) ((x) << TX_LENGTH_S)
+#define TX_LENGTH_G(x) (((x) >> TX_LENGTH_S) & TX_LENGTH_M)
+
#define T6_TX_FORCE_S 20
#define T6_TX_FORCE_V(x) ((x) << T6_TX_FORCE_S)
#define T6_TX_FORCE_F T6_TX_FORCE_V(1U)
@@ -1479,6 +1490,15 @@ struct cpl_tx_data {
#define TX_SHOVE_S 14
#define TX_SHOVE_V(x) ((x) << TX_SHOVE_S)
+#define TX_SHOVE_F TX_SHOVE_V(1U)
+
+#define TX_BYPASS_S 21
+#define TX_BYPASS_V(x) ((x) << TX_BYPASS_S)
+#define TX_BYPASS_F TX_BYPASS_V(1U)
+
+#define TX_PUSH_S 22
+#define TX_PUSH_V(x) ((x) << TX_PUSH_S)
+#define TX_PUSH_F TX_PUSH_V(1U)
#define TX_ULP_MODE_S 10
#define TX_ULP_MODE_M 0x7
--- a/drivers/net/ethernet/chelsio/cxgb4/t4_tcb.h
+++ b/drivers/net/ethernet/chelsio/cxgb4/t4_tcb.h
@@ -74,6 +74,16 @@
#define TCB_RTT_TS_RECENT_AGE_M 0xffffffffULL
#define TCB_RTT_TS_RECENT_AGE_V(x) ((x) << TCB_RTT_TS_RECENT_AGE_S)
+#define TCB_T_RTSEQ_RECENT_W 7
+#define TCB_T_RTSEQ_RECENT_S 0
+#define TCB_T_RTSEQ_RECENT_M 0xffffffffULL
+#define TCB_T_RTSEQ_RECENT_V(x) ((x) << TCB_T_RTSEQ_RECENT_S)
+
+#define TCB_TX_MAX_W 9
+#define TCB_TX_MAX_S 0
+#define TCB_TX_MAX_M 0xffffffffULL
+#define TCB_TX_MAX_V(x) ((x) << TCB_TX_MAX_S)
+
#define TCB_SND_UNA_RAW_W 10
#define TCB_SND_UNA_RAW_S 0
#define TCB_SND_UNA_RAW_M 0xfffffffULL
@@ -89,6 +99,16 @@
#define TCB_SND_MAX_RAW_M 0xfffffffULL
#define TCB_SND_MAX_RAW_V(x) ((x) << TCB_SND_MAX_RAW_S)
+#define TCB_RCV_NXT_W 16
+#define TCB_RCV_NXT_S 10
+#define TCB_RCV_NXT_M 0xffffffffULL
+#define TCB_RCV_NXT_V(x) ((x) << TCB_RCV_NXT_S)
+
+#define TCB_RCV_WND_W 17
+#define TCB_RCV_WND_S 10
+#define TCB_RCV_WND_M 0xffffffULL
+#define TCB_RCV_WND_V(x) ((x) << TCB_RCV_WND_S)
+
#define TCB_RX_FRAG2_PTR_RAW_W 27
#define TCB_RX_FRAG3_LEN_RAW_W 29
#define TCB_RX_FRAG3_START_IDX_OFFSET_RAW_W 30