v4.19.13 snapshot.
diff --git a/drivers/crypto/chelsio/chcr_ipsec.c b/drivers/crypto/chelsio/chcr_ipsec.c
new file mode 100644
index 0000000..461b97e
--- /dev/null
+++ b/drivers/crypto/chelsio/chcr_ipsec.c
@@ -0,0 +1,652 @@
+/*
+ * This file is part of the Chelsio T6 Crypto driver for Linux.
+ *
+ * Copyright (c) 2003-2017 Chelsio Communications, Inc. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses. You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ * Redistribution and use in source and binary forms, with or
+ * without modification, are permitted provided that the following
+ * conditions are met:
+ *
+ * - Redistributions of source code must retain the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer.
+ *
+ * - 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.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ * Written and Maintained by:
+ * Atul Gupta (atul.gupta@chelsio.com)
+ */
+
+#define pr_fmt(fmt) "chcr:" fmt
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/crypto.h>
+#include <linux/cryptohash.h>
+#include <linux/skbuff.h>
+#include <linux/rtnetlink.h>
+#include <linux/highmem.h>
+#include <linux/if_vlan.h>
+#include <linux/ip.h>
+#include <linux/netdevice.h>
+#include <net/esp.h>
+#include <net/xfrm.h>
+#include <crypto/aes.h>
+#include <crypto/algapi.h>
+#include <crypto/hash.h>
+#include <crypto/sha.h>
+#include <crypto/authenc.h>
+#include <crypto/internal/aead.h>
+#include <crypto/null.h>
+#include <crypto/internal/skcipher.h>
+#include <crypto/aead.h>
+#include <crypto/scatterwalk.h>
+#include <crypto/internal/hash.h>
+
+#include "chcr_core.h"
+#include "chcr_algo.h"
+#include "chcr_crypto.h"
+
+/*
+ * Max Tx descriptor space we allow for an Ethernet packet to be inlined
+ * into a WR.
+ */
+#define MAX_IMM_TX_PKT_LEN 256
+#define GCM_ESP_IV_SIZE 8
+
+static int chcr_xfrm_add_state(struct xfrm_state *x);
+static void chcr_xfrm_del_state(struct xfrm_state *x);
+static void chcr_xfrm_free_state(struct xfrm_state *x);
+static bool chcr_ipsec_offload_ok(struct sk_buff *skb, struct xfrm_state *x);
+
+static const struct xfrmdev_ops chcr_xfrmdev_ops = {
+ .xdo_dev_state_add = chcr_xfrm_add_state,
+ .xdo_dev_state_delete = chcr_xfrm_del_state,
+ .xdo_dev_state_free = chcr_xfrm_free_state,
+ .xdo_dev_offload_ok = chcr_ipsec_offload_ok,
+};
+
+/* Add offload xfrms to Chelsio Interface */
+void chcr_add_xfrmops(const struct cxgb4_lld_info *lld)
+{
+ struct net_device *netdev = NULL;
+ int i;
+
+ for (i = 0; i < lld->nports; i++) {
+ netdev = lld->ports[i];
+ if (!netdev)
+ continue;
+ netdev->xfrmdev_ops = &chcr_xfrmdev_ops;
+ netdev->hw_enc_features |= NETIF_F_HW_ESP;
+ netdev->features |= NETIF_F_HW_ESP;
+ rtnl_lock();
+ netdev_change_features(netdev);
+ rtnl_unlock();
+ }
+}
+
+static inline int chcr_ipsec_setauthsize(struct xfrm_state *x,
+ struct ipsec_sa_entry *sa_entry)
+{
+ int hmac_ctrl;
+ int authsize = x->aead->alg_icv_len / 8;
+
+ sa_entry->authsize = authsize;
+
+ switch (authsize) {
+ case ICV_8:
+ hmac_ctrl = CHCR_SCMD_HMAC_CTRL_DIV2;
+ break;
+ case ICV_12:
+ hmac_ctrl = CHCR_SCMD_HMAC_CTRL_IPSEC_96BIT;
+ break;
+ case ICV_16:
+ hmac_ctrl = CHCR_SCMD_HMAC_CTRL_NO_TRUNC;
+ break;
+ default:
+ return -EINVAL;
+ }
+ return hmac_ctrl;
+}
+
+static inline int chcr_ipsec_setkey(struct xfrm_state *x,
+ struct ipsec_sa_entry *sa_entry)
+{
+ struct crypto_cipher *cipher;
+ int keylen = (x->aead->alg_key_len + 7) / 8;
+ unsigned char *key = x->aead->alg_key;
+ int ck_size, key_ctx_size = 0;
+ unsigned char ghash_h[AEAD_H_SIZE];
+ int ret = 0;
+
+ if (keylen > 3) {
+ keylen -= 4; /* nonce/salt is present in the last 4 bytes */
+ memcpy(sa_entry->salt, key + keylen, 4);
+ }
+
+ if (keylen == AES_KEYSIZE_128) {
+ ck_size = CHCR_KEYCTX_CIPHER_KEY_SIZE_128;
+ } else if (keylen == AES_KEYSIZE_192) {
+ ck_size = CHCR_KEYCTX_CIPHER_KEY_SIZE_192;
+ } else if (keylen == AES_KEYSIZE_256) {
+ ck_size = CHCR_KEYCTX_CIPHER_KEY_SIZE_256;
+ } else {
+ pr_err("GCM: Invalid key length %d\n", keylen);
+ ret = -EINVAL;
+ goto out;
+ }
+
+ memcpy(sa_entry->key, key, keylen);
+ sa_entry->enckey_len = keylen;
+ key_ctx_size = sizeof(struct _key_ctx) +
+ ((DIV_ROUND_UP(keylen, 16)) << 4) +
+ AEAD_H_SIZE;
+
+ sa_entry->key_ctx_hdr = FILL_KEY_CTX_HDR(ck_size,
+ CHCR_KEYCTX_MAC_KEY_SIZE_128,
+ 0, 0,
+ key_ctx_size >> 4);
+
+ /* Calculate the H = CIPH(K, 0 repeated 16 times).
+ * It will go in key context
+ */
+ cipher = crypto_alloc_cipher("aes-generic", 0, 0);
+ if (IS_ERR(cipher)) {
+ sa_entry->enckey_len = 0;
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ ret = crypto_cipher_setkey(cipher, key, keylen);
+ if (ret) {
+ sa_entry->enckey_len = 0;
+ goto out1;
+ }
+ memset(ghash_h, 0, AEAD_H_SIZE);
+ crypto_cipher_encrypt_one(cipher, ghash_h, ghash_h);
+ memcpy(sa_entry->key + (DIV_ROUND_UP(sa_entry->enckey_len, 16) *
+ 16), ghash_h, AEAD_H_SIZE);
+ sa_entry->kctx_len = ((DIV_ROUND_UP(sa_entry->enckey_len, 16)) << 4) +
+ AEAD_H_SIZE;
+out1:
+ crypto_free_cipher(cipher);
+out:
+ return ret;
+}
+
+/*
+ * chcr_xfrm_add_state
+ * returns 0 on success, negative error if failed to send message to FPGA
+ * positive error if FPGA returned a bad response
+ */
+static int chcr_xfrm_add_state(struct xfrm_state *x)
+{
+ struct ipsec_sa_entry *sa_entry;
+ int res = 0;
+
+ if (x->props.aalgo != SADB_AALG_NONE) {
+ pr_debug("CHCR: Cannot offload authenticated xfrm states\n");
+ return -EINVAL;
+ }
+ if (x->props.calgo != SADB_X_CALG_NONE) {
+ pr_debug("CHCR: Cannot offload compressed xfrm states\n");
+ return -EINVAL;
+ }
+ if (x->props.flags & XFRM_STATE_ESN) {
+ pr_debug("CHCR: Cannot offload ESN xfrm states\n");
+ return -EINVAL;
+ }
+ if (x->props.family != AF_INET &&
+ x->props.family != AF_INET6) {
+ pr_debug("CHCR: Only IPv4/6 xfrm state offloaded\n");
+ return -EINVAL;
+ }
+ if (x->props.mode != XFRM_MODE_TRANSPORT &&
+ x->props.mode != XFRM_MODE_TUNNEL) {
+ pr_debug("CHCR: Only transport and tunnel xfrm offload\n");
+ return -EINVAL;
+ }
+ if (x->id.proto != IPPROTO_ESP) {
+ pr_debug("CHCR: Only ESP xfrm state offloaded\n");
+ return -EINVAL;
+ }
+ if (x->encap) {
+ pr_debug("CHCR: Encapsulated xfrm state not offloaded\n");
+ return -EINVAL;
+ }
+ if (!x->aead) {
+ pr_debug("CHCR: Cannot offload xfrm states without aead\n");
+ return -EINVAL;
+ }
+ if (x->aead->alg_icv_len != 128 &&
+ x->aead->alg_icv_len != 96) {
+ pr_debug("CHCR: Cannot offload xfrm states with AEAD ICV length other than 96b & 128b\n");
+ return -EINVAL;
+ }
+ if ((x->aead->alg_key_len != 128 + 32) &&
+ (x->aead->alg_key_len != 256 + 32)) {
+ pr_debug("CHCR: Cannot offload xfrm states with AEAD key length other than 128/256 bit\n");
+ return -EINVAL;
+ }
+ if (x->tfcpad) {
+ pr_debug("CHCR: Cannot offload xfrm states with tfc padding\n");
+ return -EINVAL;
+ }
+ if (!x->geniv) {
+ pr_debug("CHCR: Cannot offload xfrm states without geniv\n");
+ return -EINVAL;
+ }
+ if (strcmp(x->geniv, "seqiv")) {
+ pr_debug("CHCR: Cannot offload xfrm states with geniv other than seqiv\n");
+ return -EINVAL;
+ }
+
+ sa_entry = kzalloc(sizeof(*sa_entry), GFP_KERNEL);
+ if (!sa_entry) {
+ res = -ENOMEM;
+ goto out;
+ }
+
+ sa_entry->hmac_ctrl = chcr_ipsec_setauthsize(x, sa_entry);
+ chcr_ipsec_setkey(x, sa_entry);
+ x->xso.offload_handle = (unsigned long)sa_entry;
+ try_module_get(THIS_MODULE);
+out:
+ return res;
+}
+
+static void chcr_xfrm_del_state(struct xfrm_state *x)
+{
+ /* do nothing */
+ if (!x->xso.offload_handle)
+ return;
+}
+
+static void chcr_xfrm_free_state(struct xfrm_state *x)
+{
+ struct ipsec_sa_entry *sa_entry;
+
+ if (!x->xso.offload_handle)
+ return;
+
+ sa_entry = (struct ipsec_sa_entry *)x->xso.offload_handle;
+ kfree(sa_entry);
+ module_put(THIS_MODULE);
+}
+
+static bool chcr_ipsec_offload_ok(struct sk_buff *skb, struct xfrm_state *x)
+{
+ /* Offload with IP options is not supported yet */
+ if (ip_hdr(skb)->ihl > 5)
+ return false;
+
+ return true;
+}
+
+static inline int is_eth_imm(const struct sk_buff *skb, unsigned int kctx_len)
+{
+ int hdrlen = sizeof(struct chcr_ipsec_req) + kctx_len;
+
+ hdrlen += sizeof(struct cpl_tx_pkt);
+ if (skb->len <= MAX_IMM_TX_PKT_LEN - hdrlen)
+ return hdrlen;
+ return 0;
+}
+
+static inline unsigned int calc_tx_sec_flits(const struct sk_buff *skb,
+ unsigned int kctx_len)
+{
+ unsigned int flits;
+ int hdrlen = is_eth_imm(skb, kctx_len);
+
+ /* If the skb is small enough, we can pump it out as a work request
+ * with only immediate data. In that case we just have to have the
+ * TX Packet header plus the skb data in the Work Request.
+ */
+
+ if (hdrlen)
+ return DIV_ROUND_UP(skb->len + hdrlen, sizeof(__be64));
+
+ flits = sgl_len(skb_shinfo(skb)->nr_frags + 1);
+
+ /* Otherwise, we're going to have to construct a Scatter gather list
+ * of the skb body and fragments. We also include the flits necessary
+ * for the TX Packet Work Request and CPL. We always have a firmware
+ * Write Header (incorporated as part of the cpl_tx_pkt_lso and
+ * cpl_tx_pkt structures), followed by either a TX Packet Write CPL
+ * message or, if we're doing a Large Send Offload, an LSO CPL message
+ * with an embedded TX Packet Write CPL message.
+ */
+ flits += (sizeof(struct fw_ulptx_wr) +
+ sizeof(struct chcr_ipsec_req) +
+ kctx_len +
+ sizeof(struct cpl_tx_pkt_core)) / sizeof(__be64);
+ return flits;
+}
+
+inline void *copy_cpltx_pktxt(struct sk_buff *skb,
+ struct net_device *dev,
+ void *pos)
+{
+ struct cpl_tx_pkt_core *cpl;
+ struct sge_eth_txq *q;
+ struct adapter *adap;
+ struct port_info *pi;
+ u32 ctrl0, qidx;
+ u64 cntrl = 0;
+ int left;
+
+ pi = netdev_priv(dev);
+ adap = pi->adapter;
+ qidx = skb->queue_mapping;
+ q = &adap->sge.ethtxq[qidx + pi->first_qset];
+
+ left = (void *)q->q.stat - pos;
+ if (!left)
+ pos = q->q.desc;
+
+ cpl = (struct cpl_tx_pkt_core *)pos;
+
+ cntrl = TXPKT_L4CSUM_DIS_F | TXPKT_IPCSUM_DIS_F;
+ ctrl0 = TXPKT_OPCODE_V(CPL_TX_PKT_XT) | TXPKT_INTF_V(pi->tx_chan) |
+ TXPKT_PF_V(adap->pf);
+ if (skb_vlan_tag_present(skb)) {
+ q->vlan_ins++;
+ cntrl |= TXPKT_VLAN_VLD_F | TXPKT_VLAN_V(skb_vlan_tag_get(skb));
+ }
+
+ cpl->ctrl0 = htonl(ctrl0);
+ cpl->pack = htons(0);
+ cpl->len = htons(skb->len);
+ cpl->ctrl1 = cpu_to_be64(cntrl);
+
+ pos += sizeof(struct cpl_tx_pkt_core);
+ return pos;
+}
+
+inline void *copy_key_cpltx_pktxt(struct sk_buff *skb,
+ struct net_device *dev,
+ void *pos,
+ struct ipsec_sa_entry *sa_entry)
+{
+ struct _key_ctx *key_ctx;
+ int left, eoq, key_len;
+ struct sge_eth_txq *q;
+ struct adapter *adap;
+ struct port_info *pi;
+ unsigned int qidx;
+
+ pi = netdev_priv(dev);
+ adap = pi->adapter;
+ qidx = skb->queue_mapping;
+ q = &adap->sge.ethtxq[qidx + pi->first_qset];
+ key_len = sa_entry->kctx_len;
+
+ /* end of queue, reset pos to start of queue */
+ eoq = (void *)q->q.stat - pos;
+ left = eoq;
+ if (!eoq) {
+ pos = q->q.desc;
+ left = 64 * q->q.size;
+ }
+
+ /* Copy the Key context header */
+ key_ctx = (struct _key_ctx *)pos;
+ key_ctx->ctx_hdr = sa_entry->key_ctx_hdr;
+ memcpy(key_ctx->salt, sa_entry->salt, MAX_SALT);
+ pos += sizeof(struct _key_ctx);
+ left -= sizeof(struct _key_ctx);
+
+ if (likely(key_len <= left)) {
+ memcpy(key_ctx->key, sa_entry->key, key_len);
+ pos += key_len;
+ } else {
+ memcpy(pos, sa_entry->key, left);
+ memcpy(q->q.desc, sa_entry->key + left,
+ key_len - left);
+ pos = (u8 *)q->q.desc + (key_len - left);
+ }
+ /* Copy CPL TX PKT XT */
+ pos = copy_cpltx_pktxt(skb, dev, pos);
+
+ return pos;
+}
+
+inline void *chcr_crypto_wreq(struct sk_buff *skb,
+ struct net_device *dev,
+ void *pos,
+ int credits,
+ struct ipsec_sa_entry *sa_entry)
+{
+ struct port_info *pi = netdev_priv(dev);
+ struct adapter *adap = pi->adapter;
+ unsigned int immdatalen = 0;
+ unsigned int ivsize = GCM_ESP_IV_SIZE;
+ struct chcr_ipsec_wr *wr;
+ unsigned int flits;
+ u32 wr_mid;
+ int qidx = skb_get_queue_mapping(skb);
+ struct sge_eth_txq *q = &adap->sge.ethtxq[qidx + pi->first_qset];
+ unsigned int kctx_len = sa_entry->kctx_len;
+ int qid = q->q.cntxt_id;
+
+ atomic_inc(&adap->chcr_stats.ipsec_cnt);
+
+ flits = calc_tx_sec_flits(skb, kctx_len);
+
+ if (is_eth_imm(skb, kctx_len))
+ immdatalen = skb->len;
+
+ /* WR Header */
+ wr = (struct chcr_ipsec_wr *)pos;
+ wr->wreq.op_to_compl = htonl(FW_WR_OP_V(FW_ULPTX_WR));
+ wr_mid = FW_CRYPTO_LOOKASIDE_WR_LEN16_V(DIV_ROUND_UP(flits, 2));
+
+ if (unlikely(credits < ETHTXQ_STOP_THRES)) {
+ netif_tx_stop_queue(q->txq);
+ q->q.stops++;
+ wr_mid |= FW_WR_EQUEQ_F | FW_WR_EQUIQ_F;
+ }
+ wr_mid |= FW_ULPTX_WR_DATA_F;
+ wr->wreq.flowid_len16 = htonl(wr_mid);
+
+ /* ULPTX */
+ wr->req.ulptx.cmd_dest = FILL_ULPTX_CMD_DEST(pi->port_id, qid);
+ wr->req.ulptx.len = htonl(DIV_ROUND_UP(flits, 2) - 1);
+
+ /* Sub-command */
+ wr->req.sc_imm.cmd_more = FILL_CMD_MORE(!immdatalen);
+ wr->req.sc_imm.len = cpu_to_be32(sizeof(struct cpl_tx_sec_pdu) +
+ sizeof(wr->req.key_ctx) +
+ kctx_len +
+ sizeof(struct cpl_tx_pkt_core) +
+ immdatalen);
+
+ /* CPL_SEC_PDU */
+ wr->req.sec_cpl.op_ivinsrtofst = htonl(
+ CPL_TX_SEC_PDU_OPCODE_V(CPL_TX_SEC_PDU) |
+ CPL_TX_SEC_PDU_CPLLEN_V(2) |
+ CPL_TX_SEC_PDU_PLACEHOLDER_V(1) |
+ CPL_TX_SEC_PDU_IVINSRTOFST_V(
+ (skb_transport_offset(skb) +
+ sizeof(struct ip_esp_hdr) + 1)));
+
+ wr->req.sec_cpl.pldlen = htonl(skb->len);
+
+ wr->req.sec_cpl.aadstart_cipherstop_hi = FILL_SEC_CPL_CIPHERSTOP_HI(
+ (skb_transport_offset(skb) + 1),
+ (skb_transport_offset(skb) +
+ sizeof(struct ip_esp_hdr)),
+ (skb_transport_offset(skb) +
+ sizeof(struct ip_esp_hdr) +
+ GCM_ESP_IV_SIZE + 1), 0);
+
+ wr->req.sec_cpl.cipherstop_lo_authinsert =
+ FILL_SEC_CPL_AUTHINSERT(0, skb_transport_offset(skb) +
+ sizeof(struct ip_esp_hdr) +
+ GCM_ESP_IV_SIZE + 1,
+ sa_entry->authsize,
+ sa_entry->authsize);
+ wr->req.sec_cpl.seqno_numivs =
+ FILL_SEC_CPL_SCMD0_SEQNO(CHCR_ENCRYPT_OP, 1,
+ CHCR_SCMD_CIPHER_MODE_AES_GCM,
+ CHCR_SCMD_AUTH_MODE_GHASH,
+ sa_entry->hmac_ctrl,
+ ivsize >> 1);
+ wr->req.sec_cpl.ivgen_hdrlen = FILL_SEC_CPL_IVGEN_HDRLEN(0, 0, 1,
+ 0, 0, 0);
+
+ pos += sizeof(struct fw_ulptx_wr) +
+ sizeof(struct ulp_txpkt) +
+ sizeof(struct ulptx_idata) +
+ sizeof(struct cpl_tx_sec_pdu);
+
+ pos = copy_key_cpltx_pktxt(skb, dev, pos, sa_entry);
+
+ return pos;
+}
+
+/**
+ * flits_to_desc - returns the num of Tx descriptors for the given flits
+ * @n: the number of flits
+ *
+ * Returns the number of Tx descriptors needed for the supplied number
+ * of flits.
+ */
+static inline unsigned int flits_to_desc(unsigned int n)
+{
+ WARN_ON(n > SGE_MAX_WR_LEN / 8);
+ return DIV_ROUND_UP(n, 8);
+}
+
+static inline unsigned int txq_avail(const struct sge_txq *q)
+{
+ return q->size - 1 - q->in_use;
+}
+
+static void eth_txq_stop(struct sge_eth_txq *q)
+{
+ netif_tx_stop_queue(q->txq);
+ q->q.stops++;
+}
+
+static inline void 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;
+}
+
+/*
+ * chcr_ipsec_xmit called from ULD Tx handler
+ */
+int chcr_ipsec_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+ struct xfrm_state *x = xfrm_input_state(skb);
+ struct ipsec_sa_entry *sa_entry;
+ u64 *pos, *end, *before, *sgl;
+ int qidx, left, credits;
+ unsigned int flits = 0, ndesc, kctx_len;
+ struct adapter *adap;
+ struct sge_eth_txq *q;
+ struct port_info *pi;
+ dma_addr_t addr[MAX_SKB_FRAGS + 1];
+ bool immediate = false;
+
+ if (!x->xso.offload_handle)
+ return NETDEV_TX_BUSY;
+
+ sa_entry = (struct ipsec_sa_entry *)x->xso.offload_handle;
+ kctx_len = sa_entry->kctx_len;
+
+ if (skb->sp->len != 1) {
+out_free: dev_kfree_skb_any(skb);
+ return NETDEV_TX_OK;
+ }
+
+ pi = netdev_priv(dev);
+ adap = pi->adapter;
+ qidx = skb->queue_mapping;
+ q = &adap->sge.ethtxq[qidx + pi->first_qset];
+
+ cxgb4_reclaim_completed_tx(adap, &q->q, true);
+
+ flits = calc_tx_sec_flits(skb, sa_entry->kctx_len);
+ ndesc = flits_to_desc(flits);
+ credits = txq_avail(&q->q) - ndesc;
+
+ if (unlikely(credits < 0)) {
+ eth_txq_stop(q);
+ dev_err(adap->pdev_dev,
+ "%s: Tx ring %u full while queue awake! cred:%d %d %d flits:%d\n",
+ dev->name, qidx, credits, ndesc, txq_avail(&q->q),
+ flits);
+ return NETDEV_TX_BUSY;
+ }
+
+ if (is_eth_imm(skb, kctx_len))
+ immediate = true;
+
+ if (!immediate &&
+ unlikely(cxgb4_map_skb(adap->pdev_dev, skb, addr) < 0)) {
+ q->mapping_err++;
+ goto out_free;
+ }
+
+ pos = (u64 *)&q->q.desc[q->q.pidx];
+ before = (u64 *)pos;
+ end = (u64 *)pos + flits;
+ /* Setup IPSec CPL */
+ pos = (void *)chcr_crypto_wreq(skb, dev, (void *)pos,
+ credits, sa_entry);
+ if (before > (u64 *)pos) {
+ left = (u8 *)end - (u8 *)q->q.stat;
+ end = (void *)q->q.desc + left;
+ }
+ if (pos == (u64 *)q->q.stat) {
+ left = (u8 *)end - (u8 *)q->q.stat;
+ end = (void *)q->q.desc + left;
+ pos = (void *)q->q.desc;
+ }
+
+ sgl = (void *)pos;
+ if (immediate) {
+ cxgb4_inline_tx_skb(skb, &q->q, sgl);
+ dev_consume_skb_any(skb);
+ } else {
+ int last_desc;
+
+ cxgb4_write_sgl(skb, &q->q, (void *)sgl, end,
+ 0, addr);
+ skb_orphan(skb);
+
+ last_desc = q->q.pidx + ndesc - 1;
+ if (last_desc >= q->q.size)
+ last_desc -= q->q.size;
+ q->q.sdesc[last_desc].skb = skb;
+ q->q.sdesc[last_desc].sgl = (struct ulptx_sgl *)sgl;
+ }
+ txq_advance(&q->q, ndesc);
+
+ cxgb4_ring_tx_db(adap, &q->q, ndesc);
+ return NETDEV_TX_OK;
+}