linux/drivers/net/ethernet/chelsio/inline_crypto/ch_ktls/chcr_ktls.c
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   1// SPDX-License-Identifier: GPL-2.0-only
   2/* Copyright (C) 2020 Chelsio Communications.  All rights reserved. */
   3
   4#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
   5
   6#include <linux/skbuff.h>
   7#include <linux/module.h>
   8#include <linux/highmem.h>
   9#include <linux/ip.h>
  10#include <net/ipv6.h>
  11#include <linux/netdevice.h>
  12#include <crypto/aes.h>
  13#include "chcr_ktls.h"
  14
  15static LIST_HEAD(uld_ctx_list);
  16static DEFINE_MUTEX(dev_mutex);
  17
  18/* chcr_get_nfrags_to_send: get the remaining nfrags after start offset
  19 * @skb: skb
  20 * @start: start offset.
  21 * @len: how much data to send after @start
  22 */
  23static int chcr_get_nfrags_to_send(struct sk_buff *skb, u32 start, u32 len)
  24{
  25        struct skb_shared_info *si = skb_shinfo(skb);
  26        u32 frag_size, skb_linear_data_len = skb_headlen(skb);
  27        u8 nfrags = 0, frag_idx = 0;
  28        skb_frag_t *frag;
  29
  30        /* if its a linear skb then return 1 */
  31        if (!skb_is_nonlinear(skb))
  32                return 1;
  33
  34        if (unlikely(start < skb_linear_data_len)) {
  35                frag_size = min(len, skb_linear_data_len - start);
  36        } else {
  37                start -= skb_linear_data_len;
  38
  39                frag = &si->frags[frag_idx];
  40                frag_size = skb_frag_size(frag);
  41                while (start >= frag_size) {
  42                        start -= frag_size;
  43                        frag_idx++;
  44                        frag = &si->frags[frag_idx];
  45                        frag_size = skb_frag_size(frag);
  46                }
  47                frag_size = min(len, skb_frag_size(frag) - start);
  48        }
  49        len -= frag_size;
  50        nfrags++;
  51
  52        while (len) {
  53                frag_size = min(len, skb_frag_size(&si->frags[frag_idx]));
  54                len -= frag_size;
  55                nfrags++;
  56                frag_idx++;
  57        }
  58        return nfrags;
  59}
  60
  61static int chcr_init_tcb_fields(struct chcr_ktls_info *tx_info);
  62static void clear_conn_resources(struct chcr_ktls_info *tx_info);
  63/*
  64 * chcr_ktls_save_keys: calculate and save crypto keys.
  65 * @tx_info - driver specific tls info.
  66 * @crypto_info - tls crypto information.
  67 * @direction - TX/RX direction.
  68 * return - SUCCESS/FAILURE.
  69 */
  70static int chcr_ktls_save_keys(struct chcr_ktls_info *tx_info,
  71                               struct tls_crypto_info *crypto_info,
  72                               enum tls_offload_ctx_dir direction)
  73{
  74        int ck_size, key_ctx_size, mac_key_size, keylen, ghash_size, ret;
  75        unsigned char ghash_h[TLS_CIPHER_AES_GCM_256_TAG_SIZE];
  76        struct tls12_crypto_info_aes_gcm_128 *info_128_gcm;
  77        struct ktls_key_ctx *kctx = &tx_info->key_ctx;
  78        struct crypto_aes_ctx aes_ctx;
  79        unsigned char *key, *salt;
  80
  81        switch (crypto_info->cipher_type) {
  82        case TLS_CIPHER_AES_GCM_128:
  83                info_128_gcm =
  84                        (struct tls12_crypto_info_aes_gcm_128 *)crypto_info;
  85                keylen = TLS_CIPHER_AES_GCM_128_KEY_SIZE;
  86                ck_size = CHCR_KEYCTX_CIPHER_KEY_SIZE_128;
  87                tx_info->salt_size = TLS_CIPHER_AES_GCM_128_SALT_SIZE;
  88                mac_key_size = CHCR_KEYCTX_MAC_KEY_SIZE_128;
  89                tx_info->iv_size = TLS_CIPHER_AES_GCM_128_IV_SIZE;
  90                tx_info->iv = be64_to_cpu(*(__be64 *)info_128_gcm->iv);
  91
  92                ghash_size = TLS_CIPHER_AES_GCM_128_TAG_SIZE;
  93                key = info_128_gcm->key;
  94                salt = info_128_gcm->salt;
  95                tx_info->record_no = *(u64 *)info_128_gcm->rec_seq;
  96
  97                /* The SCMD fields used when encrypting a full TLS
  98                 * record. Its a one time calculation till the
  99                 * connection exists.
 100                 */
 101                tx_info->scmd0_seqno_numivs =
 102                        SCMD_SEQ_NO_CTRL_V(CHCR_SCMD_SEQ_NO_CTRL_64BIT) |
 103                        SCMD_CIPH_AUTH_SEQ_CTRL_F |
 104                        SCMD_PROTO_VERSION_V(CHCR_SCMD_PROTO_VERSION_TLS) |
 105                        SCMD_CIPH_MODE_V(CHCR_SCMD_CIPHER_MODE_AES_GCM) |
 106                        SCMD_AUTH_MODE_V(CHCR_SCMD_AUTH_MODE_GHASH) |
 107                        SCMD_IV_SIZE_V(TLS_CIPHER_AES_GCM_128_IV_SIZE >> 1) |
 108                        SCMD_NUM_IVS_V(1);
 109
 110                /* keys will be sent inline. */
 111                tx_info->scmd0_ivgen_hdrlen = SCMD_KEY_CTX_INLINE_F;
 112
 113                /* The SCMD fields used when encrypting a partial TLS
 114                 * record (no trailer and possibly a truncated payload).
 115                 */
 116                tx_info->scmd0_short_seqno_numivs =
 117                        SCMD_CIPH_AUTH_SEQ_CTRL_F |
 118                        SCMD_PROTO_VERSION_V(CHCR_SCMD_PROTO_VERSION_GENERIC) |
 119                        SCMD_CIPH_MODE_V(CHCR_SCMD_CIPHER_MODE_AES_CTR) |
 120                        SCMD_IV_SIZE_V(AES_BLOCK_LEN >> 1);
 121
 122                tx_info->scmd0_short_ivgen_hdrlen =
 123                        tx_info->scmd0_ivgen_hdrlen | SCMD_AADIVDROP_F;
 124
 125                break;
 126
 127        default:
 128                pr_err("GCM: cipher type 0x%x not supported\n",
 129                       crypto_info->cipher_type);
 130                ret = -EINVAL;
 131                goto out;
 132        }
 133
 134        key_ctx_size = CHCR_KTLS_KEY_CTX_LEN +
 135                       roundup(keylen, 16) + ghash_size;
 136        /* Calculate the H = CIPH(K, 0 repeated 16 times).
 137         * It will go in key context
 138         */
 139
 140        ret = aes_expandkey(&aes_ctx, key, keylen);
 141        if (ret)
 142                goto out;
 143
 144        memset(ghash_h, 0, ghash_size);
 145        aes_encrypt(&aes_ctx, ghash_h, ghash_h);
 146        memzero_explicit(&aes_ctx, sizeof(aes_ctx));
 147
 148        /* fill the Key context */
 149        if (direction == TLS_OFFLOAD_CTX_DIR_TX) {
 150                kctx->ctx_hdr = FILL_KEY_CTX_HDR(ck_size,
 151                                                 mac_key_size,
 152                                                 key_ctx_size >> 4);
 153        } else {
 154                ret = -EINVAL;
 155                goto out;
 156        }
 157
 158        memcpy(kctx->salt, salt, tx_info->salt_size);
 159        memcpy(kctx->key, key, keylen);
 160        memcpy(kctx->key + keylen, ghash_h, ghash_size);
 161        tx_info->key_ctx_len = key_ctx_size;
 162
 163out:
 164        return ret;
 165}
 166
 167/*
 168 * chcr_ktls_act_open_req: creates TCB entry for ipv4 connection.
 169 * @sk - tcp socket.
 170 * @tx_info - driver specific tls info.
 171 * @atid - connection active tid.
 172 * return - send success/failure.
 173 */
 174static int chcr_ktls_act_open_req(struct sock *sk,
 175                                  struct chcr_ktls_info *tx_info,
 176                                  int atid)
 177{
 178        struct inet_sock *inet = inet_sk(sk);
 179        struct cpl_t6_act_open_req *cpl6;
 180        struct cpl_act_open_req *cpl;
 181        struct sk_buff *skb;
 182        unsigned int len;
 183        int qid_atid;
 184        u64 options;
 185
 186        len = sizeof(*cpl6);
 187        skb = alloc_skb(len, GFP_KERNEL);
 188        if (unlikely(!skb))
 189                return -ENOMEM;
 190        /* mark it a control pkt */
 191        set_wr_txq(skb, CPL_PRIORITY_CONTROL, tx_info->port_id);
 192
 193        cpl6 = __skb_put_zero(skb, len);
 194        cpl = (struct cpl_act_open_req *)cpl6;
 195        INIT_TP_WR(cpl6, 0);
 196        qid_atid = TID_QID_V(tx_info->rx_qid) |
 197                   TID_TID_V(atid);
 198        OPCODE_TID(cpl) = htonl(MK_OPCODE_TID(CPL_ACT_OPEN_REQ, qid_atid));
 199        cpl->local_port = inet->inet_sport;
 200        cpl->peer_port = inet->inet_dport;
 201        cpl->local_ip = inet->inet_rcv_saddr;
 202        cpl->peer_ip = inet->inet_daddr;
 203
 204        /* fill first 64 bit option field. */
 205        options = TCAM_BYPASS_F | ULP_MODE_V(ULP_MODE_NONE) | NON_OFFLOAD_F |
 206                  SMAC_SEL_V(tx_info->smt_idx) | TX_CHAN_V(tx_info->tx_chan);
 207        cpl->opt0 = cpu_to_be64(options);
 208
 209        /* next 64 bit option field. */
 210        options =
 211                TX_QUEUE_V(tx_info->adap->params.tp.tx_modq[tx_info->tx_chan]);
 212        cpl->opt2 = htonl(options);
 213
 214        return cxgb4_l2t_send(tx_info->netdev, skb, tx_info->l2te);
 215}
 216
 217#if IS_ENABLED(CONFIG_IPV6)
 218/*
 219 * chcr_ktls_act_open_req6: creates TCB entry for ipv6 connection.
 220 * @sk - tcp socket.
 221 * @tx_info - driver specific tls info.
 222 * @atid - connection active tid.
 223 * return - send success/failure.
 224 */
 225static int chcr_ktls_act_open_req6(struct sock *sk,
 226                                   struct chcr_ktls_info *tx_info,
 227                                   int atid)
 228{
 229        struct inet_sock *inet = inet_sk(sk);
 230        struct cpl_t6_act_open_req6 *cpl6;
 231        struct cpl_act_open_req6 *cpl;
 232        struct sk_buff *skb;
 233        unsigned int len;
 234        int qid_atid;
 235        u64 options;
 236
 237        len = sizeof(*cpl6);
 238        skb = alloc_skb(len, GFP_KERNEL);
 239        if (unlikely(!skb))
 240                return -ENOMEM;
 241        /* mark it a control pkt */
 242        set_wr_txq(skb, CPL_PRIORITY_CONTROL, tx_info->port_id);
 243
 244        cpl6 = __skb_put_zero(skb, len);
 245        cpl = (struct cpl_act_open_req6 *)cpl6;
 246        INIT_TP_WR(cpl6, 0);
 247        qid_atid = TID_QID_V(tx_info->rx_qid) | TID_TID_V(atid);
 248        OPCODE_TID(cpl) = htonl(MK_OPCODE_TID(CPL_ACT_OPEN_REQ6, qid_atid));
 249        cpl->local_port = inet->inet_sport;
 250        cpl->peer_port = inet->inet_dport;
 251        cpl->local_ip_hi = *(__be64 *)&sk->sk_v6_rcv_saddr.in6_u.u6_addr8[0];
 252        cpl->local_ip_lo = *(__be64 *)&sk->sk_v6_rcv_saddr.in6_u.u6_addr8[8];
 253        cpl->peer_ip_hi = *(__be64 *)&sk->sk_v6_daddr.in6_u.u6_addr8[0];
 254        cpl->peer_ip_lo = *(__be64 *)&sk->sk_v6_daddr.in6_u.u6_addr8[8];
 255
 256        /* first 64 bit option field. */
 257        options = TCAM_BYPASS_F | ULP_MODE_V(ULP_MODE_NONE) | NON_OFFLOAD_F |
 258                  SMAC_SEL_V(tx_info->smt_idx) | TX_CHAN_V(tx_info->tx_chan);
 259        cpl->opt0 = cpu_to_be64(options);
 260        /* next 64 bit option field. */
 261        options =
 262                TX_QUEUE_V(tx_info->adap->params.tp.tx_modq[tx_info->tx_chan]);
 263        cpl->opt2 = htonl(options);
 264
 265        return cxgb4_l2t_send(tx_info->netdev, skb, tx_info->l2te);
 266}
 267#endif /* #if IS_ENABLED(CONFIG_IPV6) */
 268
 269/*
 270 * chcr_setup_connection:  create a TCB entry so that TP will form tcp packets.
 271 * @sk - tcp socket.
 272 * @tx_info - driver specific tls info.
 273 * return: NET_TX_OK/NET_XMIT_DROP
 274 */
 275static int chcr_setup_connection(struct sock *sk,
 276                                 struct chcr_ktls_info *tx_info)
 277{
 278        struct tid_info *t = &tx_info->adap->tids;
 279        int atid, ret = 0;
 280
 281        atid = cxgb4_alloc_atid(t, tx_info);
 282        if (atid == -1)
 283                return -EINVAL;
 284
 285        tx_info->atid = atid;
 286
 287        if (tx_info->ip_family == AF_INET) {
 288                ret = chcr_ktls_act_open_req(sk, tx_info, atid);
 289#if IS_ENABLED(CONFIG_IPV6)
 290        } else {
 291                ret = cxgb4_clip_get(tx_info->netdev, (const u32 *)
 292                                     &sk->sk_v6_rcv_saddr,
 293                                     1);
 294                if (ret)
 295                        return ret;
 296                ret = chcr_ktls_act_open_req6(sk, tx_info, atid);
 297#endif
 298        }
 299
 300        /* if return type is NET_XMIT_CN, msg will be sent but delayed, mark ret
 301         * success, if any other return type clear atid and return that failure.
 302         */
 303        if (ret) {
 304                if (ret == NET_XMIT_CN) {
 305                        ret = 0;
 306                } else {
 307#if IS_ENABLED(CONFIG_IPV6)
 308                        /* clear clip entry */
 309                        if (tx_info->ip_family == AF_INET6)
 310                                cxgb4_clip_release(tx_info->netdev,
 311                                                   (const u32 *)
 312                                                   &sk->sk_v6_rcv_saddr,
 313                                                   1);
 314#endif
 315                        cxgb4_free_atid(t, atid);
 316                }
 317        }
 318
 319        return ret;
 320}
 321
 322/*
 323 * chcr_set_tcb_field: update tcb fields.
 324 * @tx_info - driver specific tls info.
 325 * @word - TCB word.
 326 * @mask - TCB word related mask.
 327 * @val - TCB word related value.
 328 * @no_reply - set 1 if not looking for TP response.
 329 */
 330static int chcr_set_tcb_field(struct chcr_ktls_info *tx_info, u16 word,
 331                              u64 mask, u64 val, int no_reply)
 332{
 333        struct cpl_set_tcb_field *req;
 334        struct sk_buff *skb;
 335
 336        skb = alloc_skb(sizeof(struct cpl_set_tcb_field), GFP_ATOMIC);
 337        if (!skb)
 338                return -ENOMEM;
 339
 340        req = (struct cpl_set_tcb_field *)__skb_put_zero(skb, sizeof(*req));
 341        INIT_TP_WR_CPL(req, CPL_SET_TCB_FIELD, tx_info->tid);
 342        req->reply_ctrl = htons(QUEUENO_V(tx_info->rx_qid) |
 343                                NO_REPLY_V(no_reply));
 344        req->word_cookie = htons(TCB_WORD_V(word));
 345        req->mask = cpu_to_be64(mask);
 346        req->val = cpu_to_be64(val);
 347
 348        set_wr_txq(skb, CPL_PRIORITY_CONTROL, tx_info->port_id);
 349        return cxgb4_ofld_send(tx_info->netdev, skb);
 350}
 351
 352/*
 353 * chcr_ktls_dev_del:  call back for tls_dev_del.
 354 * Remove the tid and l2t entry and close the connection.
 355 * it per connection basis.
 356 * @netdev - net device.
 357 * @tls_cts - tls context.
 358 * @direction - TX/RX crypto direction
 359 */
 360static void chcr_ktls_dev_del(struct net_device *netdev,
 361                              struct tls_context *tls_ctx,
 362                              enum tls_offload_ctx_dir direction)
 363{
 364        struct chcr_ktls_ofld_ctx_tx *tx_ctx =
 365                                chcr_get_ktls_tx_context(tls_ctx);
 366        struct chcr_ktls_info *tx_info = tx_ctx->chcr_info;
 367        struct ch_ktls_port_stats_debug *port_stats;
 368        struct chcr_ktls_uld_ctx *u_ctx;
 369
 370        if (!tx_info)
 371                return;
 372
 373        u_ctx = tx_info->adap->uld[CXGB4_ULD_KTLS].handle;
 374        if (u_ctx && u_ctx->detach)
 375                return;
 376        /* clear l2t entry */
 377        if (tx_info->l2te)
 378                cxgb4_l2t_release(tx_info->l2te);
 379
 380#if IS_ENABLED(CONFIG_IPV6)
 381        /* clear clip entry */
 382        if (tx_info->ip_family == AF_INET6)
 383                cxgb4_clip_release(netdev, (const u32 *)
 384                                   &tx_info->sk->sk_v6_rcv_saddr,
 385                                   1);
 386#endif
 387
 388        /* clear tid */
 389        if (tx_info->tid != -1) {
 390                cxgb4_remove_tid(&tx_info->adap->tids, tx_info->tx_chan,
 391                                 tx_info->tid, tx_info->ip_family);
 392
 393                xa_erase(&u_ctx->tid_list, tx_info->tid);
 394        }
 395
 396        port_stats = &tx_info->adap->ch_ktls_stats.ktls_port[tx_info->port_id];
 397        atomic64_inc(&port_stats->ktls_tx_connection_close);
 398        kvfree(tx_info);
 399        tx_ctx->chcr_info = NULL;
 400        /* release module refcount */
 401        module_put(THIS_MODULE);
 402}
 403
 404/*
 405 * chcr_ktls_dev_add:  call back for tls_dev_add.
 406 * Create a tcb entry for TP. Also add l2t entry for the connection. And
 407 * generate keys & save those keys locally.
 408 * @netdev - net device.
 409 * @tls_cts - tls context.
 410 * @direction - TX/RX crypto direction
 411 * return: SUCCESS/FAILURE.
 412 */
 413static int chcr_ktls_dev_add(struct net_device *netdev, struct sock *sk,
 414                             enum tls_offload_ctx_dir direction,
 415                             struct tls_crypto_info *crypto_info,
 416                             u32 start_offload_tcp_sn)
 417{
 418        struct tls_context *tls_ctx = tls_get_ctx(sk);
 419        struct ch_ktls_port_stats_debug *port_stats;
 420        struct chcr_ktls_ofld_ctx_tx *tx_ctx;
 421        struct chcr_ktls_uld_ctx *u_ctx;
 422        struct chcr_ktls_info *tx_info;
 423        struct dst_entry *dst;
 424        struct adapter *adap;
 425        struct port_info *pi;
 426        struct neighbour *n;
 427        u8 daaddr[16];
 428        int ret = -1;
 429
 430        tx_ctx = chcr_get_ktls_tx_context(tls_ctx);
 431
 432        pi = netdev_priv(netdev);
 433        adap = pi->adapter;
 434        port_stats = &adap->ch_ktls_stats.ktls_port[pi->port_id];
 435        atomic64_inc(&port_stats->ktls_tx_connection_open);
 436        u_ctx = adap->uld[CXGB4_ULD_KTLS].handle;
 437
 438        if (direction == TLS_OFFLOAD_CTX_DIR_RX) {
 439                pr_err("not expecting for RX direction\n");
 440                goto out;
 441        }
 442
 443        if (tx_ctx->chcr_info)
 444                goto out;
 445
 446        if (u_ctx && u_ctx->detach)
 447                goto out;
 448
 449        tx_info = kvzalloc(sizeof(*tx_info), GFP_KERNEL);
 450        if (!tx_info)
 451                goto out;
 452
 453        tx_info->sk = sk;
 454        spin_lock_init(&tx_info->lock);
 455        /* initialize tid and atid to -1, 0 is a also a valid id. */
 456        tx_info->tid = -1;
 457        tx_info->atid = -1;
 458
 459        tx_info->adap = adap;
 460        tx_info->netdev = netdev;
 461        tx_info->first_qset = pi->first_qset;
 462        tx_info->tx_chan = pi->tx_chan;
 463        tx_info->smt_idx = pi->smt_idx;
 464        tx_info->port_id = pi->port_id;
 465        tx_info->prev_ack = 0;
 466        tx_info->prev_win = 0;
 467
 468        tx_info->rx_qid = chcr_get_first_rx_qid(adap);
 469        if (unlikely(tx_info->rx_qid < 0))
 470                goto free_tx_info;
 471
 472        tx_info->prev_seq = start_offload_tcp_sn;
 473        tx_info->tcp_start_seq_number = start_offload_tcp_sn;
 474
 475        /* save crypto keys */
 476        ret = chcr_ktls_save_keys(tx_info, crypto_info, direction);
 477        if (ret < 0)
 478                goto free_tx_info;
 479
 480        /* get peer ip */
 481        if (sk->sk_family == AF_INET) {
 482                memcpy(daaddr, &sk->sk_daddr, 4);
 483                tx_info->ip_family = AF_INET;
 484#if IS_ENABLED(CONFIG_IPV6)
 485        } else {
 486                if (!ipv6_only_sock(sk) &&
 487                    ipv6_addr_type(&sk->sk_v6_daddr) == IPV6_ADDR_MAPPED) {
 488                        memcpy(daaddr, &sk->sk_daddr, 4);
 489                        tx_info->ip_family = AF_INET;
 490                } else {
 491                        memcpy(daaddr, sk->sk_v6_daddr.in6_u.u6_addr8, 16);
 492                        tx_info->ip_family = AF_INET6;
 493                }
 494#endif
 495        }
 496
 497        /* get the l2t index */
 498        dst = sk_dst_get(sk);
 499        if (!dst) {
 500                pr_err("DST entry not found\n");
 501                goto free_tx_info;
 502        }
 503        n = dst_neigh_lookup(dst, daaddr);
 504        if (!n || !n->dev) {
 505                pr_err("neighbour not found\n");
 506                dst_release(dst);
 507                goto free_tx_info;
 508        }
 509        tx_info->l2te  = cxgb4_l2t_get(adap->l2t, n, n->dev, 0);
 510
 511        neigh_release(n);
 512        dst_release(dst);
 513
 514        if (!tx_info->l2te) {
 515                pr_err("l2t entry not found\n");
 516                goto free_tx_info;
 517        }
 518
 519        /* Driver shouldn't be removed until any single connection exists */
 520        if (!try_module_get(THIS_MODULE))
 521                goto free_l2t;
 522
 523        init_completion(&tx_info->completion);
 524        /* create a filter and call cxgb4_l2t_send to send the packet out, which
 525         * will take care of updating l2t entry in hw if not already done.
 526         */
 527        tx_info->open_state = CH_KTLS_OPEN_PENDING;
 528
 529        if (chcr_setup_connection(sk, tx_info))
 530                goto put_module;
 531
 532        /* Wait for reply */
 533        wait_for_completion_timeout(&tx_info->completion, 30 * HZ);
 534        spin_lock_bh(&tx_info->lock);
 535        if (tx_info->open_state) {
 536                /* need to wait for hw response, can't free tx_info yet. */
 537                if (tx_info->open_state == CH_KTLS_OPEN_PENDING)
 538                        tx_info->pending_close = true;
 539                else
 540                        spin_unlock_bh(&tx_info->lock);
 541                /* if in pending close, free the lock after the cleanup */
 542                goto put_module;
 543        }
 544        spin_unlock_bh(&tx_info->lock);
 545
 546        /* initialize tcb */
 547        reinit_completion(&tx_info->completion);
 548        /* mark it pending for hw response */
 549        tx_info->open_state = CH_KTLS_OPEN_PENDING;
 550
 551        if (chcr_init_tcb_fields(tx_info))
 552                goto free_tid;
 553
 554        /* Wait for reply */
 555        wait_for_completion_timeout(&tx_info->completion, 30 * HZ);
 556        spin_lock_bh(&tx_info->lock);
 557        if (tx_info->open_state) {
 558                /* need to wait for hw response, can't free tx_info yet. */
 559                tx_info->pending_close = true;
 560                /* free the lock after cleanup */
 561                goto free_tid;
 562        }
 563        spin_unlock_bh(&tx_info->lock);
 564
 565        if (!cxgb4_check_l2t_valid(tx_info->l2te))
 566                goto free_tid;
 567
 568        atomic64_inc(&port_stats->ktls_tx_ctx);
 569        tx_ctx->chcr_info = tx_info;
 570
 571        return 0;
 572
 573free_tid:
 574#if IS_ENABLED(CONFIG_IPV6)
 575        /* clear clip entry */
 576        if (tx_info->ip_family == AF_INET6)
 577                cxgb4_clip_release(netdev, (const u32 *)
 578                                   &sk->sk_v6_rcv_saddr,
 579                                   1);
 580#endif
 581        cxgb4_remove_tid(&tx_info->adap->tids, tx_info->tx_chan,
 582                         tx_info->tid, tx_info->ip_family);
 583
 584        xa_erase(&u_ctx->tid_list, tx_info->tid);
 585
 586put_module:
 587        /* release module refcount */
 588        module_put(THIS_MODULE);
 589free_l2t:
 590        cxgb4_l2t_release(tx_info->l2te);
 591free_tx_info:
 592        if (tx_info->pending_close)
 593                spin_unlock_bh(&tx_info->lock);
 594        else
 595                kvfree(tx_info);
 596out:
 597        atomic64_inc(&port_stats->ktls_tx_connection_fail);
 598        return -1;
 599}
 600
 601/*
 602 * chcr_init_tcb_fields:  Initialize tcb fields to handle TCP seq number
 603 *                        handling.
 604 * @tx_info - driver specific tls info.
 605 * return: NET_TX_OK/NET_XMIT_DROP
 606 */
 607static int chcr_init_tcb_fields(struct chcr_ktls_info *tx_info)
 608{
 609        int  ret = 0;
 610
 611        /* set tcb in offload and bypass */
 612        ret =
 613        chcr_set_tcb_field(tx_info, TCB_T_FLAGS_W,
 614                           TCB_T_FLAGS_V(TF_CORE_BYPASS_F | TF_NON_OFFLOAD_F),
 615                           TCB_T_FLAGS_V(TF_CORE_BYPASS_F), 1);
 616        if (ret)
 617                return ret;
 618        /* reset snd_una and snd_next fields in tcb */
 619        ret = chcr_set_tcb_field(tx_info, TCB_SND_UNA_RAW_W,
 620                                 TCB_SND_NXT_RAW_V(TCB_SND_NXT_RAW_M) |
 621                                 TCB_SND_UNA_RAW_V(TCB_SND_UNA_RAW_M),
 622                                 0, 1);
 623        if (ret)
 624                return ret;
 625
 626        /* reset send max */
 627        ret = chcr_set_tcb_field(tx_info, TCB_SND_MAX_RAW_W,
 628                                 TCB_SND_MAX_RAW_V(TCB_SND_MAX_RAW_M),
 629                                 0, 1);
 630        if (ret)
 631                return ret;
 632
 633        /* update l2t index and request for tp reply to confirm tcb is
 634         * initialised to handle tx traffic.
 635         */
 636        ret = chcr_set_tcb_field(tx_info, TCB_L2T_IX_W,
 637                                 TCB_L2T_IX_V(TCB_L2T_IX_M),
 638                                 TCB_L2T_IX_V(tx_info->l2te->idx), 0);
 639        return ret;
 640}
 641
 642/*
 643 * chcr_ktls_cpl_act_open_rpl: connection reply received from TP.
 644 */
 645static int chcr_ktls_cpl_act_open_rpl(struct adapter *adap,
 646                                      unsigned char *input)
 647{
 648        const struct cpl_act_open_rpl *p = (void *)input;
 649        struct chcr_ktls_info *tx_info = NULL;
 650        struct chcr_ktls_ofld_ctx_tx *tx_ctx;
 651        struct chcr_ktls_uld_ctx *u_ctx;
 652        unsigned int atid, tid, status;
 653        struct tls_context *tls_ctx;
 654        struct tid_info *t;
 655        int ret = 0;
 656
 657        tid = GET_TID(p);
 658        status = AOPEN_STATUS_G(ntohl(p->atid_status));
 659        atid = TID_TID_G(AOPEN_ATID_G(ntohl(p->atid_status)));
 660
 661        t = &adap->tids;
 662        tx_info = lookup_atid(t, atid);
 663
 664        if (!tx_info || tx_info->atid != atid) {
 665                pr_err("%s: incorrect tx_info or atid\n", __func__);
 666                return -1;
 667        }
 668
 669        cxgb4_free_atid(t, atid);
 670        tx_info->atid = -1;
 671
 672        spin_lock(&tx_info->lock);
 673        /* HW response is very close, finish pending cleanup */
 674        if (tx_info->pending_close) {
 675                spin_unlock(&tx_info->lock);
 676                if (!status) {
 677                        cxgb4_remove_tid(&tx_info->adap->tids, tx_info->tx_chan,
 678                                         tid, tx_info->ip_family);
 679                }
 680                kvfree(tx_info);
 681                return 0;
 682        }
 683
 684        if (!status) {
 685                tx_info->tid = tid;
 686                cxgb4_insert_tid(t, tx_info, tx_info->tid, tx_info->ip_family);
 687                /* Adding tid */
 688                tls_ctx = tls_get_ctx(tx_info->sk);
 689                tx_ctx = chcr_get_ktls_tx_context(tls_ctx);
 690                u_ctx = adap->uld[CXGB4_ULD_KTLS].handle;
 691                if (u_ctx) {
 692                        ret = xa_insert_bh(&u_ctx->tid_list, tid, tx_ctx,
 693                                           GFP_NOWAIT);
 694                        if (ret < 0) {
 695                                pr_err("%s: Failed to allocate tid XA entry = %d\n",
 696                                       __func__, tx_info->tid);
 697                                tx_info->open_state = CH_KTLS_OPEN_FAILURE;
 698                                goto out;
 699                        }
 700                }
 701                tx_info->open_state = CH_KTLS_OPEN_SUCCESS;
 702        } else {
 703                tx_info->open_state = CH_KTLS_OPEN_FAILURE;
 704        }
 705out:
 706        spin_unlock(&tx_info->lock);
 707
 708        complete(&tx_info->completion);
 709        return ret;
 710}
 711
 712/*
 713 * chcr_ktls_cpl_set_tcb_rpl: TCB reply received from TP.
 714 */
 715static int chcr_ktls_cpl_set_tcb_rpl(struct adapter *adap, unsigned char *input)
 716{
 717        const struct cpl_set_tcb_rpl *p = (void *)input;
 718        struct chcr_ktls_info *tx_info = NULL;
 719        struct tid_info *t;
 720        u32 tid;
 721
 722        tid = GET_TID(p);
 723
 724        t = &adap->tids;
 725        tx_info = lookup_tid(t, tid);
 726
 727        if (!tx_info || tx_info->tid != tid) {
 728                pr_err("%s: incorrect tx_info or tid\n", __func__);
 729                return -1;
 730        }
 731
 732        spin_lock(&tx_info->lock);
 733        if (tx_info->pending_close) {
 734                spin_unlock(&tx_info->lock);
 735                kvfree(tx_info);
 736                return 0;
 737        }
 738        tx_info->open_state = CH_KTLS_OPEN_SUCCESS;
 739        spin_unlock(&tx_info->lock);
 740
 741        complete(&tx_info->completion);
 742        return 0;
 743}
 744
 745static void *__chcr_write_cpl_set_tcb_ulp(struct chcr_ktls_info *tx_info,
 746                                        u32 tid, void *pos, u16 word,
 747                                        struct sge_eth_txq *q, u64 mask,
 748                                        u64 val, u32 reply)
 749{
 750        struct cpl_set_tcb_field_core *cpl;
 751        struct ulptx_idata *idata;
 752        struct ulp_txpkt *txpkt;
 753
 754        /* ULP_TXPKT */
 755        txpkt = pos;
 756        txpkt->cmd_dest = htonl(ULPTX_CMD_V(ULP_TX_PKT) |
 757                                ULP_TXPKT_CHANNELID_V(tx_info->port_id) |
 758                                ULP_TXPKT_FID_V(q->q.cntxt_id) |
 759                                ULP_TXPKT_RO_F);
 760        txpkt->len = htonl(DIV_ROUND_UP(CHCR_SET_TCB_FIELD_LEN, 16));
 761
 762        /* ULPTX_IDATA sub-command */
 763        idata = (struct ulptx_idata *)(txpkt + 1);
 764        idata->cmd_more = htonl(ULPTX_CMD_V(ULP_TX_SC_IMM));
 765        idata->len = htonl(sizeof(*cpl));
 766        pos = idata + 1;
 767
 768        cpl = pos;
 769        /* CPL_SET_TCB_FIELD */
 770        OPCODE_TID(cpl) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, tid));
 771        cpl->reply_ctrl = htons(QUEUENO_V(tx_info->rx_qid) |
 772                        NO_REPLY_V(!reply));
 773        cpl->word_cookie = htons(TCB_WORD_V(word));
 774        cpl->mask = cpu_to_be64(mask);
 775        cpl->val = cpu_to_be64(val);
 776
 777        /* ULPTX_NOOP */
 778        idata = (struct ulptx_idata *)(cpl + 1);
 779        idata->cmd_more = htonl(ULPTX_CMD_V(ULP_TX_SC_NOOP));
 780        idata->len = htonl(0);
 781        pos = idata + 1;
 782
 783        return pos;
 784}
 785
 786
 787/*
 788 * chcr_write_cpl_set_tcb_ulp: update tcb values.
 789 * TCB is responsible to create tcp headers, so all the related values
 790 * should be correctly updated.
 791 * @tx_info - driver specific tls info.
 792 * @q - tx queue on which packet is going out.
 793 * @tid - TCB identifier.
 794 * @pos - current index where should we start writing.
 795 * @word - TCB word.
 796 * @mask - TCB word related mask.
 797 * @val - TCB word related value.
 798 * @reply - set 1 if looking for TP response.
 799 * return - next position to write.
 800 */
 801static void *chcr_write_cpl_set_tcb_ulp(struct chcr_ktls_info *tx_info,
 802                                        struct sge_eth_txq *q, u32 tid,
 803                                        void *pos, u16 word, u64 mask,
 804                                        u64 val, u32 reply)
 805{
 806        int left = (void *)q->q.stat - pos;
 807
 808        if (unlikely(left < CHCR_SET_TCB_FIELD_LEN)) {
 809                if (!left) {
 810                        pos = q->q.desc;
 811                } else {
 812                        u8 buf[48] = {0};
 813
 814                        __chcr_write_cpl_set_tcb_ulp(tx_info, tid, buf, word, q,
 815                                                     mask, val, reply);
 816
 817                        return chcr_copy_to_txd(buf, &q->q, pos,
 818                                                CHCR_SET_TCB_FIELD_LEN);
 819                }
 820        }
 821
 822        pos = __chcr_write_cpl_set_tcb_ulp(tx_info, tid, pos, word, q,
 823                                           mask, val, reply);
 824
 825        /* check again if we are at the end of the queue */
 826        if (left == CHCR_SET_TCB_FIELD_LEN)
 827                pos = q->q.desc;
 828
 829        return pos;
 830}
 831
 832/*
 833 * chcr_ktls_xmit_tcb_cpls: update tcb entry so that TP will create the header
 834 * with updated values like tcp seq, ack, window etc.
 835 * @tx_info - driver specific tls info.
 836 * @q - TX queue.
 837 * @tcp_seq
 838 * @tcp_ack
 839 * @tcp_win
 840 * return: NETDEV_TX_BUSY/NET_TX_OK.
 841 */
 842static int chcr_ktls_xmit_tcb_cpls(struct chcr_ktls_info *tx_info,
 843                                   struct sge_eth_txq *q, u64 tcp_seq,
 844                                   u64 tcp_ack, u64 tcp_win, bool offset)
 845{
 846        bool first_wr = ((tx_info->prev_ack == 0) && (tx_info->prev_win == 0));
 847        struct ch_ktls_port_stats_debug *port_stats;
 848        u32 len, cpl = 0, ndesc, wr_len, wr_mid = 0;
 849        struct fw_ulptx_wr *wr;
 850        int credits;
 851        void *pos;
 852
 853        wr_len = sizeof(*wr);
 854        /* there can be max 4 cpls, check if we have enough credits */
 855        len = wr_len + 4 * roundup(CHCR_SET_TCB_FIELD_LEN, 16);
 856        ndesc = DIV_ROUND_UP(len, 64);
 857
 858        credits = chcr_txq_avail(&q->q) - ndesc;
 859        if (unlikely(credits < 0)) {
 860                chcr_eth_txq_stop(q);
 861                return NETDEV_TX_BUSY;
 862        }
 863
 864        if (unlikely(credits < ETHTXQ_STOP_THRES)) {
 865                chcr_eth_txq_stop(q);
 866                wr_mid |= FW_WR_EQUEQ_F | FW_WR_EQUIQ_F;
 867        }
 868
 869        pos = &q->q.desc[q->q.pidx];
 870        /* make space for WR, we'll fill it later when we know all the cpls
 871         * being sent out and have complete length.
 872         */
 873        wr = pos;
 874        pos += wr_len;
 875        /* update tx_max if its a re-transmit or the first wr */
 876        if (first_wr || tcp_seq != tx_info->prev_seq) {
 877                pos = chcr_write_cpl_set_tcb_ulp(tx_info, q, tx_info->tid, pos,
 878                                                 TCB_TX_MAX_W,
 879                                                 TCB_TX_MAX_V(TCB_TX_MAX_M),
 880                                                 TCB_TX_MAX_V(tcp_seq), 0);
 881                cpl++;
 882        }
 883        /* reset snd una if it's a re-transmit pkt */
 884        if (tcp_seq != tx_info->prev_seq || offset) {
 885                /* reset snd_una */
 886                port_stats =
 887                        &tx_info->adap->ch_ktls_stats.ktls_port[tx_info->port_id];
 888                pos = chcr_write_cpl_set_tcb_ulp(tx_info, q, tx_info->tid, pos,
 889                                                 TCB_SND_UNA_RAW_W,
 890                                                 TCB_SND_UNA_RAW_V
 891                                                 (TCB_SND_UNA_RAW_M),
 892                                                 TCB_SND_UNA_RAW_V(0), 0);
 893                if (tcp_seq != tx_info->prev_seq)
 894                        atomic64_inc(&port_stats->ktls_tx_ooo);
 895                cpl++;
 896        }
 897        /* update ack */
 898        if (first_wr || tx_info->prev_ack != tcp_ack) {
 899                pos = chcr_write_cpl_set_tcb_ulp(tx_info, q, tx_info->tid, pos,
 900                                                 TCB_RCV_NXT_W,
 901                                                 TCB_RCV_NXT_V(TCB_RCV_NXT_M),
 902                                                 TCB_RCV_NXT_V(tcp_ack), 0);
 903                tx_info->prev_ack = tcp_ack;
 904                cpl++;
 905        }
 906        /* update receive window */
 907        if (first_wr || tx_info->prev_win != tcp_win) {
 908                chcr_write_cpl_set_tcb_ulp(tx_info, q, tx_info->tid, pos,
 909                                           TCB_RCV_WND_W,
 910                                           TCB_RCV_WND_V(TCB_RCV_WND_M),
 911                                           TCB_RCV_WND_V(tcp_win), 0);
 912                tx_info->prev_win = tcp_win;
 913                cpl++;
 914        }
 915
 916        if (cpl) {
 917                /* get the actual length */
 918                len = wr_len + cpl * roundup(CHCR_SET_TCB_FIELD_LEN, 16);
 919                /* ULPTX wr */
 920                wr->op_to_compl = htonl(FW_WR_OP_V(FW_ULPTX_WR));
 921                wr->cookie = 0;
 922                /* fill len in wr field */
 923                wr->flowid_len16 = htonl(wr_mid |
 924                                         FW_WR_LEN16_V(DIV_ROUND_UP(len, 16)));
 925
 926                ndesc = DIV_ROUND_UP(len, 64);
 927                chcr_txq_advance(&q->q, ndesc);
 928                cxgb4_ring_tx_db(tx_info->adap, &q->q, ndesc);
 929        }
 930        return 0;
 931}
 932
 933/*
 934 * chcr_ktls_get_tx_flits
 935 * returns number of flits to be sent out, it includes key context length, WR
 936 * size and skb fragments.
 937 */
 938static unsigned int
 939chcr_ktls_get_tx_flits(u32 nr_frags, unsigned int key_ctx_len)
 940{
 941        return chcr_sgl_len(nr_frags) +
 942               DIV_ROUND_UP(key_ctx_len + CHCR_KTLS_WR_SIZE, 8);
 943}
 944
 945/*
 946 * chcr_ktls_check_tcp_options: To check if there is any TCP option available
 947 * other than timestamp.
 948 * @skb - skb contains partial record..
 949 * return: 1 / 0
 950 */
 951static int
 952chcr_ktls_check_tcp_options(struct tcphdr *tcp)
 953{
 954        int cnt, opt, optlen;
 955        u_char *cp;
 956
 957        cp = (u_char *)(tcp + 1);
 958        cnt = (tcp->doff << 2) - sizeof(struct tcphdr);
 959        for (; cnt > 0; cnt -= optlen, cp += optlen) {
 960                opt = cp[0];
 961                if (opt == TCPOPT_EOL)
 962                        break;
 963                if (opt == TCPOPT_NOP) {
 964                        optlen = 1;
 965                } else {
 966                        if (cnt < 2)
 967                                break;
 968                        optlen = cp[1];
 969                        if (optlen < 2 || optlen > cnt)
 970                                break;
 971                }
 972                switch (opt) {
 973                case TCPOPT_NOP:
 974                        break;
 975                default:
 976                        return 1;
 977                }
 978        }
 979        return 0;
 980}
 981
 982/*
 983 * chcr_ktls_write_tcp_options : TP can't send out all the options, we need to
 984 * send out separately.
 985 * @tx_info - driver specific tls info.
 986 * @skb - skb contains partial record..
 987 * @q - TX queue.
 988 * @tx_chan - channel number.
 989 * return: NETDEV_TX_OK/NETDEV_TX_BUSY.
 990 */
 991static int
 992chcr_ktls_write_tcp_options(struct chcr_ktls_info *tx_info, struct sk_buff *skb,
 993                            struct sge_eth_txq *q, uint32_t tx_chan)
 994{
 995        struct fw_eth_tx_pkt_wr *wr;
 996        struct cpl_tx_pkt_core *cpl;
 997        u32 ctrl, iplen, maclen;
 998        struct ipv6hdr *ip6;
 999        unsigned int ndesc;
1000        struct tcphdr *tcp;
1001        int len16, pktlen;
1002        struct iphdr *ip;
1003        u32 wr_mid = 0;
1004        int credits;
1005        u8 buf[150];
1006        u64 cntrl1;
1007        void *pos;
1008
1009        iplen = skb_network_header_len(skb);
1010        maclen = skb_mac_header_len(skb);
1011
1012        /* packet length = eth hdr len + ip hdr len + tcp hdr len
1013         * (including options).
1014         */
1015        pktlen = skb_transport_offset(skb) + tcp_hdrlen(skb);
1016
1017        ctrl = sizeof(*cpl) + pktlen;
1018        len16 = DIV_ROUND_UP(sizeof(*wr) + ctrl, 16);
1019        /* check how many descriptors needed */
1020        ndesc = DIV_ROUND_UP(len16, 4);
1021
1022        credits = chcr_txq_avail(&q->q) - ndesc;
1023        if (unlikely(credits < 0)) {
1024                chcr_eth_txq_stop(q);
1025                return NETDEV_TX_BUSY;
1026        }
1027
1028        if (unlikely(credits < ETHTXQ_STOP_THRES)) {
1029                chcr_eth_txq_stop(q);
1030                wr_mid |= FW_WR_EQUEQ_F | FW_WR_EQUIQ_F;
1031        }
1032
1033        pos = &q->q.desc[q->q.pidx];
1034        wr = pos;
1035
1036        /* Firmware work request header */
1037        wr->op_immdlen = htonl(FW_WR_OP_V(FW_ETH_TX_PKT_WR) |
1038                               FW_WR_IMMDLEN_V(ctrl));
1039
1040        wr->equiq_to_len16 = htonl(wr_mid | FW_WR_LEN16_V(len16));
1041        wr->r3 = 0;
1042
1043        cpl = (void *)(wr + 1);
1044
1045        /* CPL header */
1046        cpl->ctrl0 = htonl(TXPKT_OPCODE_V(CPL_TX_PKT) | TXPKT_INTF_V(tx_chan) |
1047                           TXPKT_PF_V(tx_info->adap->pf));
1048        cpl->pack = 0;
1049        cpl->len = htons(pktlen);
1050
1051        memcpy(buf, skb->data, pktlen);
1052        if (!IS_ENABLED(CONFIG_IPV6) || tx_info->ip_family == AF_INET) {
1053                /* we need to correct ip header len */
1054                ip = (struct iphdr *)(buf + maclen);
1055                ip->tot_len = htons(pktlen - maclen);
1056                cntrl1 = TXPKT_CSUM_TYPE_V(TX_CSUM_TCPIP);
1057        } else {
1058                ip6 = (struct ipv6hdr *)(buf + maclen);
1059                ip6->payload_len = htons(pktlen - maclen - iplen);
1060                cntrl1 = TXPKT_CSUM_TYPE_V(TX_CSUM_TCPIP6);
1061        }
1062
1063        cntrl1 |= T6_TXPKT_ETHHDR_LEN_V(maclen - ETH_HLEN) |
1064                  TXPKT_IPHDR_LEN_V(iplen);
1065        /* checksum offload */
1066        cpl->ctrl1 = cpu_to_be64(cntrl1);
1067
1068        pos = cpl + 1;
1069
1070        /* now take care of the tcp header, if fin is not set then clear push
1071         * bit as well, and if fin is set, it will be sent at the last so we
1072         * need to update the tcp sequence number as per the last packet.
1073         */
1074        tcp = (struct tcphdr *)(buf + maclen + iplen);
1075
1076        if (!tcp->fin)
1077                tcp->psh = 0;
1078        else
1079                tcp->seq = htonl(tx_info->prev_seq);
1080
1081        chcr_copy_to_txd(buf, &q->q, pos, pktlen);
1082
1083        chcr_txq_advance(&q->q, ndesc);
1084        cxgb4_ring_tx_db(tx_info->adap, &q->q, ndesc);
1085        return 0;
1086}
1087
1088/*
1089 * chcr_ktls_xmit_wr_complete: This sends out the complete record. If an skb
1090 * received has partial end part of the record, send out the complete record, so
1091 * that crypto block will be able to generate TAG/HASH.
1092 * @skb - segment which has complete or partial end part.
1093 * @tx_info - driver specific tls info.
1094 * @q - TX queue.
1095 * @tcp_seq
1096 * @tcp_push - tcp push bit.
1097 * @mss - segment size.
1098 * return: NETDEV_TX_BUSY/NET_TX_OK.
1099 */
1100static int chcr_ktls_xmit_wr_complete(struct sk_buff *skb,
1101                                      struct chcr_ktls_info *tx_info,
1102                                      struct sge_eth_txq *q, u32 tcp_seq,
1103                                      bool is_last_wr, u32 data_len,
1104                                      u32 skb_offset, u32 nfrags,
1105                                      bool tcp_push, u32 mss)
1106{
1107        u32 len16, wr_mid = 0, flits = 0, ndesc, cipher_start;
1108        struct adapter *adap = tx_info->adap;
1109        int credits, left, last_desc;
1110        struct tx_sw_desc *sgl_sdesc;
1111        struct cpl_tx_data *tx_data;
1112        struct cpl_tx_sec_pdu *cpl;
1113        struct ulptx_idata *idata;
1114        struct ulp_txpkt *ulptx;
1115        struct fw_ulptx_wr *wr;
1116        void *pos;
1117        u64 *end;
1118
1119        /* get the number of flits required */
1120        flits = chcr_ktls_get_tx_flits(nfrags, tx_info->key_ctx_len);
1121        /* number of descriptors */
1122        ndesc = chcr_flits_to_desc(flits);
1123        /* check if enough credits available */
1124        credits = chcr_txq_avail(&q->q) - ndesc;
1125        if (unlikely(credits < 0)) {
1126                chcr_eth_txq_stop(q);
1127                return NETDEV_TX_BUSY;
1128        }
1129
1130        if (unlikely(credits < ETHTXQ_STOP_THRES)) {
1131                /* Credits are below the threshold values, stop the queue after
1132                 * injecting the Work Request for this packet.
1133                 */
1134                chcr_eth_txq_stop(q);
1135                wr_mid |= FW_WR_EQUEQ_F | FW_WR_EQUIQ_F;
1136        }
1137
1138        last_desc = q->q.pidx + ndesc - 1;
1139        if (last_desc >= q->q.size)
1140                last_desc -= q->q.size;
1141        sgl_sdesc = &q->q.sdesc[last_desc];
1142
1143        if (unlikely(cxgb4_map_skb(adap->pdev_dev, skb, sgl_sdesc->addr) < 0)) {
1144                memset(sgl_sdesc->addr, 0, sizeof(sgl_sdesc->addr));
1145                q->mapping_err++;
1146                return NETDEV_TX_BUSY;
1147        }
1148
1149        if (!is_last_wr)
1150                skb_get(skb);
1151
1152        pos = &q->q.desc[q->q.pidx];
1153        end = (u64 *)pos + flits;
1154        /* FW_ULPTX_WR */
1155        wr = pos;
1156        /* WR will need len16 */
1157        len16 = DIV_ROUND_UP(flits, 2);
1158        wr->op_to_compl = htonl(FW_WR_OP_V(FW_ULPTX_WR));
1159        wr->flowid_len16 = htonl(wr_mid | FW_WR_LEN16_V(len16));
1160        wr->cookie = 0;
1161        pos += sizeof(*wr);
1162        /* ULP_TXPKT */
1163        ulptx = pos;
1164        ulptx->cmd_dest = htonl(ULPTX_CMD_V(ULP_TX_PKT) |
1165                                ULP_TXPKT_CHANNELID_V(tx_info->port_id) |
1166                                ULP_TXPKT_FID_V(q->q.cntxt_id) |
1167                                ULP_TXPKT_RO_F);
1168        ulptx->len = htonl(len16 - 1);
1169        /* ULPTX_IDATA sub-command */
1170        idata = (struct ulptx_idata *)(ulptx + 1);
1171        idata->cmd_more = htonl(ULPTX_CMD_V(ULP_TX_SC_IMM) | ULP_TX_SC_MORE_F);
1172        /* idata length will include cpl_tx_sec_pdu + key context size +
1173         * cpl_tx_data header.
1174         */
1175        idata->len = htonl(sizeof(*cpl) + tx_info->key_ctx_len +
1176                           sizeof(*tx_data));
1177        /* SEC CPL */
1178        cpl = (struct cpl_tx_sec_pdu *)(idata + 1);
1179        cpl->op_ivinsrtofst =
1180                htonl(CPL_TX_SEC_PDU_OPCODE_V(CPL_TX_SEC_PDU) |
1181                      CPL_TX_SEC_PDU_CPLLEN_V(CHCR_CPL_TX_SEC_PDU_LEN_64BIT) |
1182                      CPL_TX_SEC_PDU_PLACEHOLDER_V(1) |
1183                      CPL_TX_SEC_PDU_IVINSRTOFST_V(TLS_HEADER_SIZE + 1));
1184        cpl->pldlen = htonl(data_len);
1185
1186        /* encryption should start after tls header size + iv size */
1187        cipher_start = TLS_HEADER_SIZE + tx_info->iv_size + 1;
1188
1189        cpl->aadstart_cipherstop_hi =
1190                htonl(CPL_TX_SEC_PDU_AADSTART_V(1) |
1191                      CPL_TX_SEC_PDU_AADSTOP_V(TLS_HEADER_SIZE) |
1192                      CPL_TX_SEC_PDU_CIPHERSTART_V(cipher_start));
1193
1194        /* authentication will also start after tls header + iv size */
1195        cpl->cipherstop_lo_authinsert =
1196        htonl(CPL_TX_SEC_PDU_AUTHSTART_V(cipher_start) |
1197              CPL_TX_SEC_PDU_AUTHSTOP_V(TLS_CIPHER_AES_GCM_128_TAG_SIZE) |
1198              CPL_TX_SEC_PDU_AUTHINSERT_V(TLS_CIPHER_AES_GCM_128_TAG_SIZE));
1199
1200        /* These two flits are actually a CPL_TLS_TX_SCMD_FMT. */
1201        cpl->seqno_numivs = htonl(tx_info->scmd0_seqno_numivs);
1202        cpl->ivgen_hdrlen = htonl(tx_info->scmd0_ivgen_hdrlen);
1203        cpl->scmd1 = cpu_to_be64(tx_info->record_no);
1204
1205        pos = cpl + 1;
1206        /* check if space left to fill the keys */
1207        left = (void *)q->q.stat - pos;
1208        if (!left) {
1209                left = (void *)end - (void *)q->q.stat;
1210                pos = q->q.desc;
1211                end = pos + left;
1212        }
1213
1214        pos = chcr_copy_to_txd(&tx_info->key_ctx, &q->q, pos,
1215                               tx_info->key_ctx_len);
1216        left = (void *)q->q.stat - pos;
1217
1218        if (!left) {
1219                left = (void *)end - (void *)q->q.stat;
1220                pos = q->q.desc;
1221                end = pos + left;
1222        }
1223        /* CPL_TX_DATA */
1224        tx_data = (void *)pos;
1225        OPCODE_TID(tx_data) = htonl(MK_OPCODE_TID(CPL_TX_DATA, tx_info->tid));
1226        tx_data->len = htonl(TX_DATA_MSS_V(mss) | TX_LENGTH_V(data_len));
1227
1228        tx_data->rsvd = htonl(tcp_seq);
1229
1230        tx_data->flags = htonl(TX_BYPASS_F);
1231        if (tcp_push)
1232                tx_data->flags |= htonl(TX_PUSH_F | TX_SHOVE_F);
1233
1234        /* check left again, it might go beyond queue limit */
1235        pos = tx_data + 1;
1236        left = (void *)q->q.stat - pos;
1237
1238        /* check the position again */
1239        if (!left) {
1240                left = (void *)end - (void *)q->q.stat;
1241                pos = q->q.desc;
1242                end = pos + left;
1243        }
1244
1245        /* send the complete packet except the header */
1246        cxgb4_write_partial_sgl(skb, &q->q, pos, end, sgl_sdesc->addr,
1247                                skb_offset, data_len);
1248        sgl_sdesc->skb = skb;
1249
1250        chcr_txq_advance(&q->q, ndesc);
1251        cxgb4_ring_tx_db(adap, &q->q, ndesc);
1252        atomic64_inc(&adap->ch_ktls_stats.ktls_tx_send_records);
1253
1254        return 0;
1255}
1256
1257/*
1258 * chcr_ktls_xmit_wr_short: This is to send out partial records. If its
1259 * a middle part of a record, fetch the prior data to make it 16 byte aligned
1260 * and then only send it out.
1261 *
1262 * @skb - skb contains partial record..
1263 * @tx_info - driver specific tls info.
1264 * @q - TX queue.
1265 * @tcp_seq
1266 * @tcp_push - tcp push bit.
1267 * @mss - segment size.
1268 * @tls_rec_offset - offset from start of the tls record.
1269 * @perior_data - data before the current segment, required to make this record
1270 *                16 byte aligned.
1271 * @prior_data_len - prior_data length (less than 16)
1272 * return: NETDEV_TX_BUSY/NET_TX_OK.
1273 */
1274static int chcr_ktls_xmit_wr_short(struct sk_buff *skb,
1275                                   struct chcr_ktls_info *tx_info,
1276                                   struct sge_eth_txq *q,
1277                                   u32 tcp_seq, bool tcp_push, u32 mss,
1278                                   u32 tls_rec_offset, u8 *prior_data,
1279                                   u32 prior_data_len, u32 data_len,
1280                                   u32 skb_offset)
1281{
1282        u32 len16, wr_mid = 0, cipher_start, nfrags;
1283        struct adapter *adap = tx_info->adap;
1284        unsigned int flits = 0, ndesc;
1285        int credits, left, last_desc;
1286        struct tx_sw_desc *sgl_sdesc;
1287        struct cpl_tx_data *tx_data;
1288        struct cpl_tx_sec_pdu *cpl;
1289        struct ulptx_idata *idata;
1290        struct ulp_txpkt *ulptx;
1291        struct fw_ulptx_wr *wr;
1292        __be64 iv_record;
1293        void *pos;
1294        u64 *end;
1295
1296        nfrags = chcr_get_nfrags_to_send(skb, skb_offset, data_len);
1297        /* get the number of flits required, it's a partial record so 2 flits
1298         * (AES_BLOCK_SIZE) will be added.
1299         */
1300        flits = chcr_ktls_get_tx_flits(nfrags, tx_info->key_ctx_len) + 2;
1301        /* get the correct 8 byte IV of this record */
1302        iv_record = cpu_to_be64(tx_info->iv + tx_info->record_no);
1303        /* If it's a middle record and not 16 byte aligned to run AES CTR, need
1304         * to make it 16 byte aligned. So atleadt 2 extra flits of immediate
1305         * data will be added.
1306         */
1307        if (prior_data_len)
1308                flits += 2;
1309        /* number of descriptors */
1310        ndesc = chcr_flits_to_desc(flits);
1311        /* check if enough credits available */
1312        credits = chcr_txq_avail(&q->q) - ndesc;
1313        if (unlikely(credits < 0)) {
1314                chcr_eth_txq_stop(q);
1315                return NETDEV_TX_BUSY;
1316        }
1317
1318        if (unlikely(credits < ETHTXQ_STOP_THRES)) {
1319                chcr_eth_txq_stop(q);
1320                wr_mid |= FW_WR_EQUEQ_F | FW_WR_EQUIQ_F;
1321        }
1322
1323        last_desc = q->q.pidx + ndesc - 1;
1324        if (last_desc >= q->q.size)
1325                last_desc -= q->q.size;
1326        sgl_sdesc = &q->q.sdesc[last_desc];
1327
1328        if (unlikely(cxgb4_map_skb(adap->pdev_dev, skb, sgl_sdesc->addr) < 0)) {
1329                memset(sgl_sdesc->addr, 0, sizeof(sgl_sdesc->addr));
1330                q->mapping_err++;
1331                return NETDEV_TX_BUSY;
1332        }
1333
1334        pos = &q->q.desc[q->q.pidx];
1335        end = (u64 *)pos + flits;
1336        /* FW_ULPTX_WR */
1337        wr = pos;
1338        /* WR will need len16 */
1339        len16 = DIV_ROUND_UP(flits, 2);
1340        wr->op_to_compl = htonl(FW_WR_OP_V(FW_ULPTX_WR));
1341        wr->flowid_len16 = htonl(wr_mid | FW_WR_LEN16_V(len16));
1342        wr->cookie = 0;
1343        pos += sizeof(*wr);
1344        /* ULP_TXPKT */
1345        ulptx = pos;
1346        ulptx->cmd_dest = htonl(ULPTX_CMD_V(ULP_TX_PKT) |
1347                                ULP_TXPKT_CHANNELID_V(tx_info->port_id) |
1348                                ULP_TXPKT_FID_V(q->q.cntxt_id) |
1349                                ULP_TXPKT_RO_F);
1350        ulptx->len = htonl(len16 - 1);
1351        /* ULPTX_IDATA sub-command */
1352        idata = (struct ulptx_idata *)(ulptx + 1);
1353        idata->cmd_more = htonl(ULPTX_CMD_V(ULP_TX_SC_IMM) | ULP_TX_SC_MORE_F);
1354        /* idata length will include cpl_tx_sec_pdu + key context size +
1355         * cpl_tx_data header.
1356         */
1357        idata->len = htonl(sizeof(*cpl) + tx_info->key_ctx_len +
1358                           sizeof(*tx_data) + AES_BLOCK_LEN + prior_data_len);
1359        /* SEC CPL */
1360        cpl = (struct cpl_tx_sec_pdu *)(idata + 1);
1361        /* cipher start will have tls header + iv size extra if its a header
1362         * part of tls record. else only 16 byte IV will be added.
1363         */
1364        cipher_start =
1365                AES_BLOCK_LEN + 1 +
1366                (!tls_rec_offset ? TLS_HEADER_SIZE + tx_info->iv_size : 0);
1367
1368        cpl->op_ivinsrtofst =
1369                htonl(CPL_TX_SEC_PDU_OPCODE_V(CPL_TX_SEC_PDU) |
1370                      CPL_TX_SEC_PDU_CPLLEN_V(CHCR_CPL_TX_SEC_PDU_LEN_64BIT) |
1371                      CPL_TX_SEC_PDU_IVINSRTOFST_V(1));
1372        cpl->pldlen = htonl(data_len + AES_BLOCK_LEN + prior_data_len);
1373        cpl->aadstart_cipherstop_hi =
1374                htonl(CPL_TX_SEC_PDU_CIPHERSTART_V(cipher_start));
1375        cpl->cipherstop_lo_authinsert = 0;
1376        /* These two flits are actually a CPL_TLS_TX_SCMD_FMT. */
1377        cpl->seqno_numivs = htonl(tx_info->scmd0_short_seqno_numivs);
1378        cpl->ivgen_hdrlen = htonl(tx_info->scmd0_short_ivgen_hdrlen);
1379        cpl->scmd1 = 0;
1380
1381        pos = cpl + 1;
1382        /* check if space left to fill the keys */
1383        left = (void *)q->q.stat - pos;
1384        if (!left) {
1385                left = (void *)end - (void *)q->q.stat;
1386                pos = q->q.desc;
1387                end = pos + left;
1388        }
1389
1390        pos = chcr_copy_to_txd(&tx_info->key_ctx, &q->q, pos,
1391                               tx_info->key_ctx_len);
1392        left = (void *)q->q.stat - pos;
1393
1394        if (!left) {
1395                left = (void *)end - (void *)q->q.stat;
1396                pos = q->q.desc;
1397                end = pos + left;
1398        }
1399        /* CPL_TX_DATA */
1400        tx_data = (void *)pos;
1401        OPCODE_TID(tx_data) = htonl(MK_OPCODE_TID(CPL_TX_DATA, tx_info->tid));
1402        tx_data->len = htonl(TX_DATA_MSS_V(mss) |
1403                             TX_LENGTH_V(data_len + prior_data_len));
1404        tx_data->rsvd = htonl(tcp_seq);
1405        tx_data->flags = htonl(TX_BYPASS_F);
1406        if (tcp_push)
1407                tx_data->flags |= htonl(TX_PUSH_F | TX_SHOVE_F);
1408
1409        /* check left again, it might go beyond queue limit */
1410        pos = tx_data + 1;
1411        left = (void *)q->q.stat - pos;
1412
1413        /* check the position again */
1414        if (!left) {
1415                left = (void *)end - (void *)q->q.stat;
1416                pos = q->q.desc;
1417                end = pos + left;
1418        }
1419        /* copy the 16 byte IV for AES-CTR, which includes 4 bytes of salt, 8
1420         * bytes of actual IV and 4 bytes of 16 byte-sequence.
1421         */
1422        memcpy(pos, tx_info->key_ctx.salt, tx_info->salt_size);
1423        memcpy(pos + tx_info->salt_size, &iv_record, tx_info->iv_size);
1424        *(__be32 *)(pos + tx_info->salt_size + tx_info->iv_size) =
1425                htonl(2 + (tls_rec_offset ? ((tls_rec_offset -
1426                (TLS_HEADER_SIZE + tx_info->iv_size)) / AES_BLOCK_LEN) : 0));
1427
1428        pos += 16;
1429        /* Prior_data_len will always be less than 16 bytes, fill the
1430         * prio_data_len after AES_CTRL_BLOCK and clear the remaining length
1431         * to 0.
1432         */
1433        if (prior_data_len)
1434                pos = chcr_copy_to_txd(prior_data, &q->q, pos, 16);
1435        /* send the complete packet except the header */
1436        cxgb4_write_partial_sgl(skb, &q->q, pos, end, sgl_sdesc->addr,
1437                                skb_offset, data_len);
1438        sgl_sdesc->skb = skb;
1439
1440        chcr_txq_advance(&q->q, ndesc);
1441        cxgb4_ring_tx_db(adap, &q->q, ndesc);
1442
1443        return 0;
1444}
1445
1446/*
1447 * chcr_ktls_tx_plaintxt: This handler will take care of the records which has
1448 * only plain text (only tls header and iv)
1449 * @tx_info - driver specific tls info.
1450 * @skb - skb contains partial record..
1451 * @tcp_seq
1452 * @mss - segment size.
1453 * @tcp_push - tcp push bit.
1454 * @q - TX queue.
1455 * @port_id : port number
1456 * @perior_data - data before the current segment, required to make this record
1457 *               16 byte aligned.
1458 * @prior_data_len - prior_data length (less than 16)
1459 * return: NETDEV_TX_BUSY/NET_TX_OK.
1460 */
1461static int chcr_ktls_tx_plaintxt(struct chcr_ktls_info *tx_info,
1462                                 struct sk_buff *skb, u32 tcp_seq, u32 mss,
1463                                 bool tcp_push, struct sge_eth_txq *q,
1464                                 u32 port_id, u8 *prior_data,
1465                                 u32 data_len, u32 skb_offset,
1466                                 u32 prior_data_len)
1467{
1468        int credits, left, len16, last_desc;
1469        unsigned int flits = 0, ndesc;
1470        struct tx_sw_desc *sgl_sdesc;
1471        struct cpl_tx_data *tx_data;
1472        struct ulptx_idata *idata;
1473        struct ulp_txpkt *ulptx;
1474        struct fw_ulptx_wr *wr;
1475        u32 wr_mid = 0, nfrags;
1476        void *pos;
1477        u64 *end;
1478
1479        flits = DIV_ROUND_UP(CHCR_PLAIN_TX_DATA_LEN, 8);
1480        nfrags = chcr_get_nfrags_to_send(skb, skb_offset, data_len);
1481        flits += chcr_sgl_len(nfrags);
1482        if (prior_data_len)
1483                flits += 2;
1484
1485        /* WR will need len16 */
1486        len16 = DIV_ROUND_UP(flits, 2);
1487        /* check how many descriptors needed */
1488        ndesc = DIV_ROUND_UP(flits, 8);
1489
1490        credits = chcr_txq_avail(&q->q) - ndesc;
1491        if (unlikely(credits < 0)) {
1492                chcr_eth_txq_stop(q);
1493                return NETDEV_TX_BUSY;
1494        }
1495
1496        if (unlikely(credits < ETHTXQ_STOP_THRES)) {
1497                chcr_eth_txq_stop(q);
1498                wr_mid |= FW_WR_EQUEQ_F | FW_WR_EQUIQ_F;
1499        }
1500
1501        last_desc = q->q.pidx + ndesc - 1;
1502        if (last_desc >= q->q.size)
1503                last_desc -= q->q.size;
1504        sgl_sdesc = &q->q.sdesc[last_desc];
1505
1506        if (unlikely(cxgb4_map_skb(tx_info->adap->pdev_dev, skb,
1507                                   sgl_sdesc->addr) < 0)) {
1508                memset(sgl_sdesc->addr, 0, sizeof(sgl_sdesc->addr));
1509                q->mapping_err++;
1510                return NETDEV_TX_BUSY;
1511        }
1512
1513        pos = &q->q.desc[q->q.pidx];
1514        end = (u64 *)pos + flits;
1515        /* FW_ULPTX_WR */
1516        wr = pos;
1517        wr->op_to_compl = htonl(FW_WR_OP_V(FW_ULPTX_WR));
1518        wr->flowid_len16 = htonl(wr_mid | FW_WR_LEN16_V(len16));
1519        wr->cookie = 0;
1520        /* ULP_TXPKT */
1521        ulptx = (struct ulp_txpkt *)(wr + 1);
1522        ulptx->cmd_dest = htonl(ULPTX_CMD_V(ULP_TX_PKT) |
1523                        ULP_TXPKT_DATAMODIFY_V(0) |
1524                        ULP_TXPKT_CHANNELID_V(tx_info->port_id) |
1525                        ULP_TXPKT_DEST_V(0) |
1526                        ULP_TXPKT_FID_V(q->q.cntxt_id) | ULP_TXPKT_RO_V(1));
1527        ulptx->len = htonl(len16 - 1);
1528        /* ULPTX_IDATA sub-command */
1529        idata = (struct ulptx_idata *)(ulptx + 1);
1530        idata->cmd_more = htonl(ULPTX_CMD_V(ULP_TX_SC_IMM) | ULP_TX_SC_MORE_F);
1531        idata->len = htonl(sizeof(*tx_data) + prior_data_len);
1532        /* CPL_TX_DATA */
1533        tx_data = (struct cpl_tx_data *)(idata + 1);
1534        OPCODE_TID(tx_data) = htonl(MK_OPCODE_TID(CPL_TX_DATA, tx_info->tid));
1535        tx_data->len = htonl(TX_DATA_MSS_V(mss) |
1536                             TX_LENGTH_V(data_len + prior_data_len));
1537        /* set tcp seq number */
1538        tx_data->rsvd = htonl(tcp_seq);
1539        tx_data->flags = htonl(TX_BYPASS_F);
1540        if (tcp_push)
1541                tx_data->flags |= htonl(TX_PUSH_F | TX_SHOVE_F);
1542
1543        pos = tx_data + 1;
1544        /* apart from prior_data_len, we should set remaining part of 16 bytes
1545         * to be zero.
1546         */
1547        if (prior_data_len)
1548                pos = chcr_copy_to_txd(prior_data, &q->q, pos, 16);
1549
1550        /* check left again, it might go beyond queue limit */
1551        left = (void *)q->q.stat - pos;
1552
1553        /* check the position again */
1554        if (!left) {
1555                left = (void *)end - (void *)q->q.stat;
1556                pos = q->q.desc;
1557                end = pos + left;
1558        }
1559        /* send the complete packet including the header */
1560        cxgb4_write_partial_sgl(skb, &q->q, pos, end, sgl_sdesc->addr,
1561                                skb_offset, data_len);
1562        sgl_sdesc->skb = skb;
1563
1564        chcr_txq_advance(&q->q, ndesc);
1565        cxgb4_ring_tx_db(tx_info->adap, &q->q, ndesc);
1566        return 0;
1567}
1568
1569static int chcr_ktls_tunnel_pkt(struct chcr_ktls_info *tx_info,
1570                                struct sk_buff *skb,
1571                                struct sge_eth_txq *q)
1572{
1573        u32 ctrl, iplen, maclen, wr_mid = 0, len16;
1574        struct tx_sw_desc *sgl_sdesc;
1575        struct fw_eth_tx_pkt_wr *wr;
1576        struct cpl_tx_pkt_core *cpl;
1577        unsigned int flits, ndesc;
1578        int credits, last_desc;
1579        u64 cntrl1, *end;
1580        void *pos;
1581
1582        ctrl = sizeof(*cpl);
1583        flits = DIV_ROUND_UP(sizeof(*wr) + ctrl, 8);
1584
1585        flits += chcr_sgl_len(skb_shinfo(skb)->nr_frags + 1);
1586        len16 = DIV_ROUND_UP(flits, 2);
1587        /* check how many descriptors needed */
1588        ndesc = DIV_ROUND_UP(flits, 8);
1589
1590        credits = chcr_txq_avail(&q->q) - ndesc;
1591        if (unlikely(credits < 0)) {
1592                chcr_eth_txq_stop(q);
1593                return -ENOMEM;
1594        }
1595
1596        if (unlikely(credits < ETHTXQ_STOP_THRES)) {
1597                chcr_eth_txq_stop(q);
1598                wr_mid |= FW_WR_EQUEQ_F | FW_WR_EQUIQ_F;
1599        }
1600
1601        last_desc = q->q.pidx + ndesc - 1;
1602        if (last_desc >= q->q.size)
1603                last_desc -= q->q.size;
1604        sgl_sdesc = &q->q.sdesc[last_desc];
1605
1606        if (unlikely(cxgb4_map_skb(tx_info->adap->pdev_dev, skb,
1607                                   sgl_sdesc->addr) < 0)) {
1608                memset(sgl_sdesc->addr, 0, sizeof(sgl_sdesc->addr));
1609                q->mapping_err++;
1610                return -ENOMEM;
1611        }
1612
1613        iplen = skb_network_header_len(skb);
1614        maclen = skb_mac_header_len(skb);
1615
1616        pos = &q->q.desc[q->q.pidx];
1617        end = (u64 *)pos + flits;
1618        wr = pos;
1619
1620        /* Firmware work request header */
1621        wr->op_immdlen = htonl(FW_WR_OP_V(FW_ETH_TX_PKT_WR) |
1622                               FW_WR_IMMDLEN_V(ctrl));
1623
1624        wr->equiq_to_len16 = htonl(wr_mid | FW_WR_LEN16_V(len16));
1625        wr->r3 = 0;
1626
1627        cpl = (void *)(wr + 1);
1628
1629        /* CPL header */
1630        cpl->ctrl0 = htonl(TXPKT_OPCODE_V(CPL_TX_PKT) |
1631                           TXPKT_INTF_V(tx_info->tx_chan) |
1632                           TXPKT_PF_V(tx_info->adap->pf));
1633        cpl->pack = 0;
1634        cntrl1 = TXPKT_CSUM_TYPE_V(tx_info->ip_family == AF_INET ?
1635                                   TX_CSUM_TCPIP : TX_CSUM_TCPIP6);
1636        cntrl1 |= T6_TXPKT_ETHHDR_LEN_V(maclen - ETH_HLEN) |
1637                  TXPKT_IPHDR_LEN_V(iplen);
1638        /* checksum offload */
1639        cpl->ctrl1 = cpu_to_be64(cntrl1);
1640        cpl->len = htons(skb->len);
1641
1642        pos = cpl + 1;
1643
1644        cxgb4_write_sgl(skb, &q->q, pos, end, 0, sgl_sdesc->addr);
1645        sgl_sdesc->skb = skb;
1646        chcr_txq_advance(&q->q, ndesc);
1647        cxgb4_ring_tx_db(tx_info->adap, &q->q, ndesc);
1648        return 0;
1649}
1650
1651/*
1652 * chcr_ktls_copy_record_in_skb
1653 * @nskb - new skb where the frags to be added.
1654 * @skb - old skb, to copy socket and destructor details.
1655 * @record - specific record which has complete 16k record in frags.
1656 */
1657static void chcr_ktls_copy_record_in_skb(struct sk_buff *nskb,
1658                                         struct sk_buff *skb,
1659                                         struct tls_record_info *record)
1660{
1661        int i = 0;
1662
1663        for (i = 0; i < record->num_frags; i++) {
1664                skb_shinfo(nskb)->frags[i] = record->frags[i];
1665                /* increase the frag ref count */
1666                __skb_frag_ref(&skb_shinfo(nskb)->frags[i]);
1667        }
1668
1669        skb_shinfo(nskb)->nr_frags = record->num_frags;
1670        nskb->data_len = record->len;
1671        nskb->len += record->len;
1672        nskb->truesize += record->len;
1673        nskb->sk = skb->sk;
1674        nskb->destructor = skb->destructor;
1675        refcount_add(nskb->truesize, &nskb->sk->sk_wmem_alloc);
1676}
1677
1678/*
1679 * chcr_end_part_handler: This handler will handle the record which
1680 * is complete or if record's end part is received. T6 adapter has a issue that
1681 * it can't send out TAG with partial record so if its an end part then we have
1682 * to send TAG as well and for which we need to fetch the complete record and
1683 * send it to crypto module.
1684 * @tx_info - driver specific tls info.
1685 * @skb - skb contains partial record.
1686 * @record - complete record of 16K size.
1687 * @tcp_seq
1688 * @mss - segment size in which TP needs to chop a packet.
1689 * @tcp_push_no_fin - tcp push if fin is not set.
1690 * @q - TX queue.
1691 * @tls_end_offset - offset from end of the record.
1692 * @last wr : check if this is the last part of the skb going out.
1693 * return: NETDEV_TX_OK/NETDEV_TX_BUSY.
1694 */
1695static int chcr_end_part_handler(struct chcr_ktls_info *tx_info,
1696                                 struct sk_buff *skb,
1697                                 struct tls_record_info *record,
1698                                 u32 tcp_seq, int mss, bool tcp_push_no_fin,
1699                                 struct sge_eth_txq *q, u32 skb_offset,
1700                                 u32 tls_end_offset, bool last_wr)
1701{
1702        bool free_skb_if_tx_fails = false;
1703        struct sk_buff *nskb = NULL;
1704
1705        /* check if it is a complete record */
1706        if (tls_end_offset == record->len) {
1707                nskb = skb;
1708                atomic64_inc(&tx_info->adap->ch_ktls_stats.ktls_tx_complete_pkts);
1709        } else {
1710                nskb = alloc_skb(0, GFP_ATOMIC);
1711                if (!nskb) {
1712                        dev_kfree_skb_any(skb);
1713                        return NETDEV_TX_BUSY;
1714                }
1715
1716                /* copy complete record in skb */
1717                chcr_ktls_copy_record_in_skb(nskb, skb, record);
1718                /* packet is being sent from the beginning, update the tcp_seq
1719                 * accordingly.
1720                 */
1721                tcp_seq = tls_record_start_seq(record);
1722                /* reset skb offset */
1723                skb_offset = 0;
1724
1725                if (last_wr)
1726                        dev_kfree_skb_any(skb);
1727                else
1728                        free_skb_if_tx_fails = true;
1729
1730                last_wr = true;
1731
1732                atomic64_inc(&tx_info->adap->ch_ktls_stats.ktls_tx_end_pkts);
1733        }
1734
1735        if (chcr_ktls_xmit_wr_complete(nskb, tx_info, q, tcp_seq,
1736                                       last_wr, record->len, skb_offset,
1737                                       record->num_frags,
1738                                       (last_wr && tcp_push_no_fin),
1739                                       mss)) {
1740                if (free_skb_if_tx_fails)
1741                        dev_kfree_skb_any(skb);
1742                goto out;
1743        }
1744        tx_info->prev_seq = record->end_seq;
1745        return 0;
1746out:
1747        dev_kfree_skb_any(nskb);
1748        return NETDEV_TX_BUSY;
1749}
1750
1751/*
1752 * chcr_short_record_handler: This handler will take care of the records which
1753 * doesn't have end part (1st part or the middle part(/s) of a record). In such
1754 * cases, AES CTR will be used in place of AES GCM to send out partial packet.
1755 * This partial record might be the first part of the record, or the middle
1756 * part. In case of middle record we should fetch the prior data to make it 16
1757 * byte aligned. If it has a partial tls header or iv then get to the start of
1758 * tls header. And if it has partial TAG, then remove the complete TAG and send
1759 * only the payload.
1760 * There is one more possibility that it gets a partial header, send that
1761 * portion as a plaintext.
1762 * @tx_info - driver specific tls info.
1763 * @skb - skb contains partial record..
1764 * @record - complete record of 16K size.
1765 * @tcp_seq
1766 * @mss - segment size in which TP needs to chop a packet.
1767 * @tcp_push_no_fin - tcp push if fin is not set.
1768 * @q - TX queue.
1769 * @tls_end_offset - offset from end of the record.
1770 * return: NETDEV_TX_OK/NETDEV_TX_BUSY.
1771 */
1772static int chcr_short_record_handler(struct chcr_ktls_info *tx_info,
1773                                     struct sk_buff *skb,
1774                                     struct tls_record_info *record,
1775                                     u32 tcp_seq, int mss, bool tcp_push_no_fin,
1776                                     u32 data_len, u32 skb_offset,
1777                                     struct sge_eth_txq *q, u32 tls_end_offset)
1778{
1779        u32 tls_rec_offset = tcp_seq - tls_record_start_seq(record);
1780        u8 prior_data[16] = {0};
1781        u32 prior_data_len = 0;
1782
1783        /* check if the skb is ending in middle of tag/HASH, its a big
1784         * trouble, send the packet before the HASH.
1785         */
1786        int remaining_record = tls_end_offset - data_len;
1787
1788        if (remaining_record > 0 &&
1789            remaining_record < TLS_CIPHER_AES_GCM_128_TAG_SIZE) {
1790                int trimmed_len = 0;
1791
1792                if (tls_end_offset > TLS_CIPHER_AES_GCM_128_TAG_SIZE)
1793                        trimmed_len = data_len -
1794                                      (TLS_CIPHER_AES_GCM_128_TAG_SIZE -
1795                                       remaining_record);
1796                if (!trimmed_len)
1797                        return FALLBACK;
1798
1799                WARN_ON(trimmed_len > data_len);
1800
1801                data_len = trimmed_len;
1802                atomic64_inc(&tx_info->adap->ch_ktls_stats.ktls_tx_trimmed_pkts);
1803        }
1804
1805        /* check if it is only the header part. */
1806        if (tls_rec_offset + data_len <= (TLS_HEADER_SIZE + tx_info->iv_size)) {
1807                if (chcr_ktls_tx_plaintxt(tx_info, skb, tcp_seq, mss,
1808                                          tcp_push_no_fin, q,
1809                                          tx_info->port_id, prior_data,
1810                                          data_len, skb_offset, prior_data_len))
1811                        goto out;
1812
1813                tx_info->prev_seq = tcp_seq + data_len;
1814                return 0;
1815        }
1816
1817        /* check if the middle record's start point is 16 byte aligned. CTR
1818         * needs 16 byte aligned start point to start encryption.
1819         */
1820        if (tls_rec_offset) {
1821                /* there is an offset from start, means its a middle record */
1822                int remaining = 0;
1823
1824                if (tls_rec_offset < (TLS_HEADER_SIZE + tx_info->iv_size)) {
1825                        prior_data_len = tls_rec_offset;
1826                        tls_rec_offset = 0;
1827                        remaining = 0;
1828                } else {
1829                        prior_data_len =
1830                                (tls_rec_offset -
1831                                (TLS_HEADER_SIZE + tx_info->iv_size))
1832                                % AES_BLOCK_LEN;
1833                        remaining = tls_rec_offset - prior_data_len;
1834                }
1835
1836                /* if prior_data_len is not zero, means we need to fetch prior
1837                 * data to make this record 16 byte aligned, or we need to reach
1838                 * to start offset.
1839                 */
1840                if (prior_data_len) {
1841                        int i = 0;
1842                        u8 *data = NULL;
1843                        skb_frag_t *f;
1844                        u8 *vaddr;
1845                        int frag_size = 0, frag_delta = 0;
1846
1847                        while (remaining > 0) {
1848                                frag_size = skb_frag_size(&record->frags[i]);
1849                                if (remaining < frag_size)
1850                                        break;
1851
1852                                remaining -= frag_size;
1853                                i++;
1854                        }
1855                        f = &record->frags[i];
1856                        vaddr = kmap_atomic(skb_frag_page(f));
1857
1858                        data = vaddr + skb_frag_off(f)  + remaining;
1859                        frag_delta = skb_frag_size(f) - remaining;
1860
1861                        if (frag_delta >= prior_data_len) {
1862                                memcpy(prior_data, data, prior_data_len);
1863                                kunmap_atomic(vaddr);
1864                        } else {
1865                                memcpy(prior_data, data, frag_delta);
1866                                kunmap_atomic(vaddr);
1867                                /* get the next page */
1868                                f = &record->frags[i + 1];
1869                                vaddr = kmap_atomic(skb_frag_page(f));
1870                                data = vaddr + skb_frag_off(f);
1871                                memcpy(prior_data + frag_delta,
1872                                       data, (prior_data_len - frag_delta));
1873                                kunmap_atomic(vaddr);
1874                        }
1875                        /* reset tcp_seq as per the prior_data_required len */
1876                        tcp_seq -= prior_data_len;
1877                }
1878                atomic64_inc(&tx_info->adap->ch_ktls_stats.ktls_tx_middle_pkts);
1879        } else {
1880                atomic64_inc(&tx_info->adap->ch_ktls_stats.ktls_tx_start_pkts);
1881        }
1882
1883        if (chcr_ktls_xmit_wr_short(skb, tx_info, q, tcp_seq, tcp_push_no_fin,
1884                                    mss, tls_rec_offset, prior_data,
1885                                    prior_data_len, data_len, skb_offset)) {
1886                goto out;
1887        }
1888
1889        tx_info->prev_seq = tcp_seq + data_len + prior_data_len;
1890        return 0;
1891out:
1892        dev_kfree_skb_any(skb);
1893        return NETDEV_TX_BUSY;
1894}
1895
1896static int chcr_ktls_sw_fallback(struct sk_buff *skb,
1897                                 struct chcr_ktls_info *tx_info,
1898                                 struct sge_eth_txq *q)
1899{
1900        u32 data_len, skb_offset;
1901        struct sk_buff *nskb;
1902        struct tcphdr *th;
1903
1904        nskb = tls_encrypt_skb(skb);
1905
1906        if (!nskb)
1907                return 0;
1908
1909        th = tcp_hdr(nskb);
1910        skb_offset =  skb_transport_offset(nskb) + tcp_hdrlen(nskb);
1911        data_len = nskb->len - skb_offset;
1912        skb_tx_timestamp(nskb);
1913
1914        if (chcr_ktls_tunnel_pkt(tx_info, nskb, q))
1915                goto out;
1916
1917        tx_info->prev_seq = ntohl(th->seq) + data_len;
1918        atomic64_inc(&tx_info->adap->ch_ktls_stats.ktls_tx_fallback);
1919        return 0;
1920out:
1921        dev_kfree_skb_any(nskb);
1922        return 0;
1923}
1924/* nic tls TX handler */
1925static int chcr_ktls_xmit(struct sk_buff *skb, struct net_device *dev)
1926{
1927        u32 tls_end_offset, tcp_seq, skb_data_len, skb_offset;
1928        struct ch_ktls_port_stats_debug *port_stats;
1929        struct chcr_ktls_ofld_ctx_tx *tx_ctx;
1930        struct ch_ktls_stats_debug *stats;
1931        struct tcphdr *th = tcp_hdr(skb);
1932        int data_len, qidx, ret = 0, mss;
1933        struct tls_record_info *record;
1934        struct chcr_ktls_info *tx_info;
1935        struct tls_context *tls_ctx;
1936        struct sge_eth_txq *q;
1937        struct adapter *adap;
1938        unsigned long flags;
1939
1940        tcp_seq = ntohl(th->seq);
1941        skb_offset = skb_transport_offset(skb) + tcp_hdrlen(skb);
1942        skb_data_len = skb->len - skb_offset;
1943        data_len = skb_data_len;
1944
1945        mss = skb_is_gso(skb) ? skb_shinfo(skb)->gso_size : data_len;
1946
1947        tls_ctx = tls_get_ctx(skb->sk);
1948        if (unlikely(tls_ctx->netdev != dev))
1949                goto out;
1950
1951        tx_ctx = chcr_get_ktls_tx_context(tls_ctx);
1952        tx_info = tx_ctx->chcr_info;
1953
1954        if (unlikely(!tx_info))
1955                goto out;
1956
1957        adap = tx_info->adap;
1958        stats = &adap->ch_ktls_stats;
1959        port_stats = &stats->ktls_port[tx_info->port_id];
1960
1961        qidx = skb->queue_mapping;
1962        q = &adap->sge.ethtxq[qidx + tx_info->first_qset];
1963        cxgb4_reclaim_completed_tx(adap, &q->q, true);
1964        /* if tcp options are set but finish is not send the options first */
1965        if (!th->fin && chcr_ktls_check_tcp_options(th)) {
1966                ret = chcr_ktls_write_tcp_options(tx_info, skb, q,
1967                                                  tx_info->tx_chan);
1968                if (ret)
1969                        return NETDEV_TX_BUSY;
1970        }
1971
1972        /* TCP segments can be in received either complete or partial.
1973         * chcr_end_part_handler will handle cases if complete record or end
1974         * part of the record is received. In case of partial end part of record,
1975         * we will send the complete record again.
1976         */
1977
1978        spin_lock_irqsave(&tx_ctx->base.lock, flags);
1979
1980        do {
1981
1982                cxgb4_reclaim_completed_tx(adap, &q->q, true);
1983                /* fetch the tls record */
1984                record = tls_get_record(&tx_ctx->base, tcp_seq,
1985                                        &tx_info->record_no);
1986                /* By the time packet reached to us, ACK is received, and record
1987                 * won't be found in that case, handle it gracefully.
1988                 */
1989                if (unlikely(!record)) {
1990                        spin_unlock_irqrestore(&tx_ctx->base.lock, flags);
1991                        atomic64_inc(&port_stats->ktls_tx_drop_no_sync_data);
1992                        goto out;
1993                }
1994
1995                tls_end_offset = record->end_seq - tcp_seq;
1996
1997                pr_debug("seq 0x%x, end_seq 0x%x prev_seq 0x%x, datalen 0x%x\n",
1998                         tcp_seq, record->end_seq, tx_info->prev_seq, data_len);
1999                /* update tcb for the skb */
2000                if (skb_data_len == data_len) {
2001                        u32 tx_max = tcp_seq;
2002
2003                        if (!tls_record_is_start_marker(record) &&
2004                            tls_end_offset < TLS_CIPHER_AES_GCM_128_TAG_SIZE)
2005                                tx_max = record->end_seq -
2006                                        TLS_CIPHER_AES_GCM_128_TAG_SIZE;
2007
2008                        ret = chcr_ktls_xmit_tcb_cpls(tx_info, q, tx_max,
2009                                                      ntohl(th->ack_seq),
2010                                                      ntohs(th->window),
2011                                                      tls_end_offset !=
2012                                                      record->len);
2013                        if (ret) {
2014                                spin_unlock_irqrestore(&tx_ctx->base.lock,
2015                                                       flags);
2016                                goto out;
2017                        }
2018
2019                        if (th->fin)
2020                                skb_get(skb);
2021                }
2022
2023                if (unlikely(tls_record_is_start_marker(record))) {
2024                        atomic64_inc(&port_stats->ktls_tx_skip_no_sync_data);
2025                        /* If tls_end_offset < data_len, means there is some
2026                         * data after start marker, which needs encryption, send
2027                         * plaintext first and take skb refcount. else send out
2028                         * complete pkt as plaintext.
2029                         */
2030                        if (tls_end_offset < data_len)
2031                                skb_get(skb);
2032                        else
2033                                tls_end_offset = data_len;
2034
2035                        ret = chcr_ktls_tx_plaintxt(tx_info, skb, tcp_seq, mss,
2036                                                    (!th->fin && th->psh), q,
2037                                                    tx_info->port_id, NULL,
2038                                                    tls_end_offset, skb_offset,
2039                                                    0);
2040
2041                        if (ret) {
2042                                /* free the refcount taken earlier */
2043                                if (tls_end_offset < data_len)
2044                                        dev_kfree_skb_any(skb);
2045                                spin_unlock_irqrestore(&tx_ctx->base.lock, flags);
2046                                goto out;
2047                        }
2048
2049                        data_len -= tls_end_offset;
2050                        tcp_seq = record->end_seq;
2051                        skb_offset += tls_end_offset;
2052                        continue;
2053                }
2054
2055                /* if a tls record is finishing in this SKB */
2056                if (tls_end_offset <= data_len) {
2057                        ret = chcr_end_part_handler(tx_info, skb, record,
2058                                                    tcp_seq, mss,
2059                                                    (!th->fin && th->psh), q,
2060                                                    skb_offset,
2061                                                    tls_end_offset,
2062                                                    skb_offset +
2063                                                    tls_end_offset == skb->len);
2064
2065                        data_len -= tls_end_offset;
2066                        /* tcp_seq increment is required to handle next record.
2067                         */
2068                        tcp_seq += tls_end_offset;
2069                        skb_offset += tls_end_offset;
2070                } else {
2071                        ret = chcr_short_record_handler(tx_info, skb,
2072                                                        record, tcp_seq, mss,
2073                                                        (!th->fin && th->psh),
2074                                                        data_len, skb_offset,
2075                                                        q, tls_end_offset);
2076                        data_len = 0;
2077                }
2078
2079                /* if any failure, come out from the loop. */
2080                if (ret) {
2081                        spin_unlock_irqrestore(&tx_ctx->base.lock, flags);
2082                        if (th->fin)
2083                                dev_kfree_skb_any(skb);
2084
2085                        if (ret == FALLBACK)
2086                                return chcr_ktls_sw_fallback(skb, tx_info, q);
2087
2088                        return NETDEV_TX_OK;
2089                }
2090
2091                /* length should never be less than 0 */
2092                WARN_ON(data_len < 0);
2093
2094        } while (data_len > 0);
2095
2096        spin_unlock_irqrestore(&tx_ctx->base.lock, flags);
2097        atomic64_inc(&port_stats->ktls_tx_encrypted_packets);
2098        atomic64_add(skb_data_len, &port_stats->ktls_tx_encrypted_bytes);
2099
2100        /* tcp finish is set, send a separate tcp msg including all the options
2101         * as well.
2102         */
2103        if (th->fin) {
2104                chcr_ktls_write_tcp_options(tx_info, skb, q, tx_info->tx_chan);
2105                dev_kfree_skb_any(skb);
2106        }
2107
2108        return NETDEV_TX_OK;
2109out:
2110        dev_kfree_skb_any(skb);
2111        return NETDEV_TX_OK;
2112}
2113
2114static void *chcr_ktls_uld_add(const struct cxgb4_lld_info *lldi)
2115{
2116        struct chcr_ktls_uld_ctx *u_ctx;
2117
2118        pr_info_once("%s - version %s\n", CHCR_KTLS_DRV_DESC,
2119                     CHCR_KTLS_DRV_VERSION);
2120        u_ctx = kzalloc(sizeof(*u_ctx), GFP_KERNEL);
2121        if (!u_ctx) {
2122                u_ctx = ERR_PTR(-ENOMEM);
2123                goto out;
2124        }
2125        u_ctx->lldi = *lldi;
2126        u_ctx->detach = false;
2127        xa_init_flags(&u_ctx->tid_list, XA_FLAGS_LOCK_BH);
2128out:
2129        return u_ctx;
2130}
2131
2132static const struct tlsdev_ops chcr_ktls_ops = {
2133        .tls_dev_add = chcr_ktls_dev_add,
2134        .tls_dev_del = chcr_ktls_dev_del,
2135};
2136
2137static chcr_handler_func work_handlers[NUM_CPL_CMDS] = {
2138        [CPL_ACT_OPEN_RPL] = chcr_ktls_cpl_act_open_rpl,
2139        [CPL_SET_TCB_RPL] = chcr_ktls_cpl_set_tcb_rpl,
2140};
2141
2142static int chcr_ktls_uld_rx_handler(void *handle, const __be64 *rsp,
2143                                    const struct pkt_gl *pgl)
2144{
2145        const struct cpl_act_open_rpl *rpl = (struct cpl_act_open_rpl *)rsp;
2146        struct chcr_ktls_uld_ctx *u_ctx = handle;
2147        u8 opcode = rpl->ot.opcode;
2148        struct adapter *adap;
2149
2150        adap = pci_get_drvdata(u_ctx->lldi.pdev);
2151
2152        if (!work_handlers[opcode]) {
2153                pr_err("Unsupported opcode %d received\n", opcode);
2154                return 0;
2155        }
2156
2157        work_handlers[opcode](adap, (unsigned char *)&rsp[1]);
2158        return 0;
2159}
2160
2161static void clear_conn_resources(struct chcr_ktls_info *tx_info)
2162{
2163        /* clear l2t entry */
2164        if (tx_info->l2te)
2165                cxgb4_l2t_release(tx_info->l2te);
2166
2167#if IS_ENABLED(CONFIG_IPV6)
2168        /* clear clip entry */
2169        if (tx_info->ip_family == AF_INET6)
2170                cxgb4_clip_release(tx_info->netdev, (const u32 *)
2171                                   &tx_info->sk->sk_v6_rcv_saddr,
2172                                   1);
2173#endif
2174
2175        /* clear tid */
2176        if (tx_info->tid != -1)
2177                cxgb4_remove_tid(&tx_info->adap->tids, tx_info->tx_chan,
2178                                 tx_info->tid, tx_info->ip_family);
2179}
2180
2181static void ch_ktls_reset_all_conn(struct chcr_ktls_uld_ctx *u_ctx)
2182{
2183        struct ch_ktls_port_stats_debug *port_stats;
2184        struct chcr_ktls_ofld_ctx_tx *tx_ctx;
2185        struct chcr_ktls_info *tx_info;
2186        unsigned long index;
2187
2188        xa_for_each(&u_ctx->tid_list, index, tx_ctx) {
2189                tx_info = tx_ctx->chcr_info;
2190                clear_conn_resources(tx_info);
2191                port_stats = &tx_info->adap->ch_ktls_stats.ktls_port[tx_info->port_id];
2192                atomic64_inc(&port_stats->ktls_tx_connection_close);
2193                kvfree(tx_info);
2194                tx_ctx->chcr_info = NULL;
2195                /* release module refcount */
2196                module_put(THIS_MODULE);
2197        }
2198}
2199
2200static int chcr_ktls_uld_state_change(void *handle, enum cxgb4_state new_state)
2201{
2202        struct chcr_ktls_uld_ctx *u_ctx = handle;
2203
2204        switch (new_state) {
2205        case CXGB4_STATE_UP:
2206                pr_info("%s: Up\n", pci_name(u_ctx->lldi.pdev));
2207                mutex_lock(&dev_mutex);
2208                list_add_tail(&u_ctx->entry, &uld_ctx_list);
2209                mutex_unlock(&dev_mutex);
2210                break;
2211        case CXGB4_STATE_START_RECOVERY:
2212        case CXGB4_STATE_DOWN:
2213        case CXGB4_STATE_DETACH:
2214                pr_info("%s: Down\n", pci_name(u_ctx->lldi.pdev));
2215                mutex_lock(&dev_mutex);
2216                u_ctx->detach = true;
2217                list_del(&u_ctx->entry);
2218                ch_ktls_reset_all_conn(u_ctx);
2219                xa_destroy(&u_ctx->tid_list);
2220                mutex_unlock(&dev_mutex);
2221                break;
2222        default:
2223                break;
2224        }
2225
2226        return 0;
2227}
2228
2229static struct cxgb4_uld_info chcr_ktls_uld_info = {
2230        .name = CHCR_KTLS_DRV_MODULE_NAME,
2231        .nrxq = 1,
2232        .rxq_size = 1024,
2233        .add = chcr_ktls_uld_add,
2234        .tx_handler = chcr_ktls_xmit,
2235        .rx_handler = chcr_ktls_uld_rx_handler,
2236        .state_change = chcr_ktls_uld_state_change,
2237        .tlsdev_ops = &chcr_ktls_ops,
2238};
2239
2240static int __init chcr_ktls_init(void)
2241{
2242        cxgb4_register_uld(CXGB4_ULD_KTLS, &chcr_ktls_uld_info);
2243        return 0;
2244}
2245
2246static void __exit chcr_ktls_exit(void)
2247{
2248        struct chcr_ktls_uld_ctx *u_ctx, *tmp;
2249        struct adapter *adap;
2250
2251        pr_info("driver unloaded\n");
2252
2253        mutex_lock(&dev_mutex);
2254        list_for_each_entry_safe(u_ctx, tmp, &uld_ctx_list, entry) {
2255                adap = pci_get_drvdata(u_ctx->lldi.pdev);
2256                memset(&adap->ch_ktls_stats, 0, sizeof(adap->ch_ktls_stats));
2257                list_del(&u_ctx->entry);
2258                xa_destroy(&u_ctx->tid_list);
2259                kfree(u_ctx);
2260        }
2261        mutex_unlock(&dev_mutex);
2262        cxgb4_unregister_uld(CXGB4_ULD_KTLS);
2263}
2264
2265module_init(chcr_ktls_init);
2266module_exit(chcr_ktls_exit);
2267
2268MODULE_DESCRIPTION("Chelsio NIC TLS ULD driver");
2269MODULE_LICENSE("GPL");
2270MODULE_AUTHOR("Chelsio Communications");
2271MODULE_VERSION(CHCR_KTLS_DRV_VERSION);
2272