drivers/scsi/cxgbi/cxgb4i/cxgb4i.c

   1 /*
   2  * cxgb4i.c: Chelsio T4 iSCSI driver.
   3  *
   4  * Copyright (c) 2010-2015 Chelsio Communications, Inc.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation.
   9  *
  10  * Written by:  Karen Xie (kxie@chelsio.com)
  11  *              Rakesh Ranjan (rranjan@chelsio.com)
  12  */
  13
  14 #define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__
  15
  16 #include <linux/kernel.h>
  17 #include <linux/module.h>
  18 #include <linux/moduleparam.h>
  19 #include <scsi/scsi_host.h>
  20 #include <net/tcp.h>
  21 #include <net/dst.h>
  22 #include <linux/netdevice.h>
  23 #include <net/addrconf.h>
  24
  25 #include "t4_regs.h"
  26 #include "t4_msg.h"
  27 #include "cxgb4.h"
  28 #include "cxgb4_uld.h"
  29 #include "t4fw_api.h"
  30 #include "l2t.h"
  31 #include "cxgb4i.h"
  32 #include "clip_tbl.h"
  33
  34 static unsigned int dbg_level;
  35
  36 #include "../libcxgbi.h"
  37
  38 #ifdef CONFIG_CHELSIO_T4_DCB
  39 #include <net/dcbevent.h>
  40 #include "cxgb4_dcb.h"
  41 #endif
  42
  43 #define DRV_MODULE_NAME         "cxgb4i"
  44 #define DRV_MODULE_DESC         "Chelsio T4-T6 iSCSI Driver"
  45 #define DRV_MODULE_VERSION      "0.9.5-ko"
  46 #define DRV_MODULE_RELDATE      "Apr. 2015"
  47
  48 static char version[] =
  49         DRV_MODULE_DESC " " DRV_MODULE_NAME
  50         " v" DRV_MODULE_VERSION " (" DRV_MODULE_RELDATE ")\n";
  51
  52 MODULE_AUTHOR("Chelsio Communications, Inc.");
  53 MODULE_DESCRIPTION(DRV_MODULE_DESC);
  54 MODULE_VERSION(DRV_MODULE_VERSION);
  55 MODULE_LICENSE("GPL");
  56
  57 module_param(dbg_level, uint, 0644);
  58 MODULE_PARM_DESC(dbg_level, "Debug flag (default=0)");
  59
  60 #define CXGB4I_DEFAULT_10G_RCV_WIN (256 * 1024)
  61 static int cxgb4i_rcv_win = -1;
  62 module_param(cxgb4i_rcv_win, int, 0644);
  63 MODULE_PARM_DESC(cxgb4i_rcv_win, "TCP receive window in bytes");
  64
  65 #define CXGB4I_DEFAULT_10G_SND_WIN (128 * 1024)
  66 static int cxgb4i_snd_win = -1;
  67 module_param(cxgb4i_snd_win, int, 0644);
  68 MODULE_PARM_DESC(cxgb4i_snd_win, "TCP send window in bytes");
  69
  70 static int cxgb4i_rx_credit_thres = 10 * 1024;
  71 module_param(cxgb4i_rx_credit_thres, int, 0644);
  72 MODULE_PARM_DESC(cxgb4i_rx_credit_thres,
  73                 "RX credits return threshold in bytes (default=10KB)");
  74
  75 static unsigned int cxgb4i_max_connect = (8 * 1024);
  76 module_param(cxgb4i_max_connect, uint, 0644);
  77 MODULE_PARM_DESC(cxgb4i_max_connect, "Maximum number of connections");
  78
  79 static unsigned short cxgb4i_sport_base = 20000;
  80 module_param(cxgb4i_sport_base, ushort, 0644);
  81 MODULE_PARM_DESC(cxgb4i_sport_base, "Starting port number (default 20000)");
  82
  83 typedef void (*cxgb4i_cplhandler_func)(struct cxgbi_device *, struct sk_buff *);
  84
  85 static void *t4_uld_add(const struct cxgb4_lld_info *);
  86 static int t4_uld_rx_handler(void *, const __be64 *, const struct pkt_gl *);
  87 static int t4_uld_state_change(void *, enum cxgb4_state state);
  88 static inline int send_tx_flowc_wr(struct cxgbi_sock *);
  89
  90 static const struct cxgb4_uld_info cxgb4i_uld_info = {
  91         .name = DRV_MODULE_NAME,
  92         .nrxq = MAX_ULD_QSETS,
  93         .ntxq = MAX_ULD_QSETS,
  94         .rxq_size = 1024,
  95         .lro = false,
  96         .add = t4_uld_add,
  97         .rx_handler = t4_uld_rx_handler,
  98         .state_change = t4_uld_state_change,
  99 };
 100
 101 static struct scsi_host_template cxgb4i_host_template = {
 102         .module         = THIS_MODULE,
 103         .name           = DRV_MODULE_NAME,
 104         .proc_name      = DRV_MODULE_NAME,
 105         .can_queue      = CXGB4I_SCSI_HOST_QDEPTH,
 106         .queuecommand   = iscsi_queuecommand,
 107         .change_queue_depth = scsi_change_queue_depth,
 108         .sg_tablesize   = SG_ALL,
 109         .max_sectors    = 0xFFFF,
 110         .cmd_per_lun    = ISCSI_DEF_CMD_PER_LUN,
 111         .eh_timed_out   = iscsi_eh_cmd_timed_out,
 112         .eh_abort_handler = iscsi_eh_abort,
 113         .eh_device_reset_handler = iscsi_eh_device_reset,
 114         .eh_target_reset_handler = iscsi_eh_recover_target,
 115         .target_alloc   = iscsi_target_alloc,
 116         .dma_boundary   = PAGE_SIZE - 1,
 117         .this_id        = -1,
 118         .track_queue_depth = 1,
 119         .cmd_size       = sizeof(struct iscsi_cmd),
 120 };
 121
 122 static struct iscsi_transport cxgb4i_iscsi_transport = {
 123         .owner          = THIS_MODULE,
 124         .name           = DRV_MODULE_NAME,
 125         .caps           = CAP_RECOVERY_L0 | CAP_MULTI_R2T | CAP_HDRDGST |
 126                                 CAP_DATADGST | CAP_DIGEST_OFFLOAD |
 127                                 CAP_PADDING_OFFLOAD | CAP_TEXT_NEGO,
 128         .attr_is_visible        = cxgbi_attr_is_visible,
 129         .get_host_param = cxgbi_get_host_param,
 130         .set_host_param = cxgbi_set_host_param,
 131         /* session management */
 132         .create_session = cxgbi_create_session,
 133         .destroy_session        = cxgbi_destroy_session,
 134         .get_session_param = iscsi_session_get_param,
 135         /* connection management */
 136         .create_conn    = cxgbi_create_conn,
 137         .bind_conn              = cxgbi_bind_conn,
 138         .unbind_conn    = iscsi_conn_unbind,
 139         .destroy_conn   = iscsi_tcp_conn_teardown,
 140         .start_conn             = iscsi_conn_start,
 141         .stop_conn              = iscsi_conn_stop,
 142         .get_conn_param = iscsi_conn_get_param,
 143         .set_param      = cxgbi_set_conn_param,
 144         .get_stats      = cxgbi_get_conn_stats,
 145         /* pdu xmit req from user space */
 146         .send_pdu       = iscsi_conn_send_pdu,
 147         /* task */
 148         .init_task      = iscsi_tcp_task_init,
 149         .xmit_task      = iscsi_tcp_task_xmit,
 150         .cleanup_task   = cxgbi_cleanup_task,
 151         /* pdu */
 152         .alloc_pdu      = cxgbi_conn_alloc_pdu,
 153         .init_pdu       = cxgbi_conn_init_pdu,
 154         .xmit_pdu       = cxgbi_conn_xmit_pdu,
 155         .parse_pdu_itt  = cxgbi_parse_pdu_itt,
 156         /* TCP connect/disconnect */
 157         .get_ep_param   = cxgbi_get_ep_param,
 158         .ep_connect     = cxgbi_ep_connect,
 159         .ep_poll        = cxgbi_ep_poll,
 160         .ep_disconnect  = cxgbi_ep_disconnect,
 161         /* Error recovery timeout call */
 162         .session_recovery_timedout = iscsi_session_recovery_timedout,
 163 };
 164
 165 #ifdef CONFIG_CHELSIO_T4_DCB
 166 static int
 167 cxgb4_dcb_change_notify(struct notifier_block *, unsigned long, void *);
 168
 169 static struct notifier_block cxgb4_dcb_change = {
 170         .notifier_call = cxgb4_dcb_change_notify,
 171 };
 172 #endif
 173
 174 static struct scsi_transport_template *cxgb4i_stt;
 175
 176 /*
 177  * CPL (Chelsio Protocol Language) defines a message passing interface between
 178  * the host driver and Chelsio asic.
 179  * The section below implments CPLs that related to iscsi tcp connection
 180  * open/close/abort and data send/receive.
 181  */
 182
 183 #define RCV_BUFSIZ_MASK         0x3FFU
 184 #define MAX_IMM_TX_PKT_LEN      256
 185
 186 static int push_tx_frames(struct cxgbi_sock *, int);
 187
 188 /*
 189  * is_ofld_imm - check whether a packet can be sent as immediate data
 190  * @skb: the packet
 191  *
 192  * Returns true if a packet can be sent as an offload WR with immediate
 193  * data.  We currently use the same limit as for Ethernet packets.
 194  */
 195 static inline bool is_ofld_imm(const struct sk_buff *skb)
 196 {
 197         int len = skb->len;
 198
 199         if (likely(cxgbi_skcb_test_flag(skb, SKCBF_TX_NEED_HDR)))
 200                 len += sizeof(struct fw_ofld_tx_data_wr);
 201
 202         if  (likely(cxgbi_skcb_test_flag((struct sk_buff *)skb, SKCBF_TX_ISO)))
 203                 len += sizeof(struct cpl_tx_data_iso);
 204
 205         return (len <= MAX_IMM_OFLD_TX_DATA_WR_LEN);
 206 }
 207
 208 static void send_act_open_req(struct cxgbi_sock *csk, struct sk_buff *skb,
 209                                 struct l2t_entry *e)
 210 {
 211         struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev);
 212         int wscale = cxgbi_sock_compute_wscale(csk->mss_idx);
 213         unsigned long long opt0;
 214         unsigned int opt2;
 215         unsigned int qid_atid = ((unsigned int)csk->atid) |
 216                                  (((unsigned int)csk->rss_qid) << 14);
 217
 218         opt0 = KEEP_ALIVE_F |
 219                 WND_SCALE_V(wscale) |
 220                 MSS_IDX_V(csk->mss_idx) |
 221                 L2T_IDX_V(((struct l2t_entry *)csk->l2t)->idx) |
 222                 TX_CHAN_V(csk->tx_chan) |
 223                 SMAC_SEL_V(csk->smac_idx) |
 224                 ULP_MODE_V(ULP_MODE_ISCSI) |
 225                 RCV_BUFSIZ_V(csk->rcv_win >> 10);
 226
 227         opt2 = RX_CHANNEL_V(0) |
 228                 RSS_QUEUE_VALID_F |
 229                 RSS_QUEUE_V(csk->rss_qid);
 230
 231         if (is_t4(lldi->adapter_type)) {
 232                 struct cpl_act_open_req *req =
 233                                 (struct cpl_act_open_req *)skb->head;
 234
 235                 INIT_TP_WR(req, 0);
 236                 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ,
 237                                         qid_atid));
 238                 req->local_port = csk->saddr.sin_port;
 239                 req->peer_port = csk->daddr.sin_port;
 240                 req->local_ip = csk->saddr.sin_addr.s_addr;
 241                 req->peer_ip = csk->daddr.sin_addr.s_addr;
 242                 req->opt0 = cpu_to_be64(opt0);
 243                 req->params = cpu_to_be32(cxgb4_select_ntuple(
 244                                         csk->cdev->ports[csk->port_id],
 245                                         csk->l2t));
 246                 opt2 |= RX_FC_VALID_F;
 247                 req->opt2 = cpu_to_be32(opt2);
 248
 249                 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
 250                         "csk t4 0x%p, %pI4:%u-%pI4:%u, atid %d, qid %u.\n",
 251                         csk, &req->local_ip, ntohs(req->local_port),
 252                         &req->peer_ip, ntohs(req->peer_port),
 253                         csk->atid, csk->rss_qid);
 254         } else if (is_t5(lldi->adapter_type)) {
 255                 struct cpl_t5_act_open_req *req =
 256                                 (struct cpl_t5_act_open_req *)skb->head;
 257                 u32 isn = (prandom_u32() & ~7UL) - 1;
 258
 259                 INIT_TP_WR(req, 0);
 260                 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ,
 261                                         qid_atid));
 262                 req->local_port = csk->saddr.sin_port;
 263                 req->peer_port = csk->daddr.sin_port;
 264                 req->local_ip = csk->saddr.sin_addr.s_addr;
 265                 req->peer_ip = csk->daddr.sin_addr.s_addr;
 266                 req->opt0 = cpu_to_be64(opt0);
 267                 req->params = cpu_to_be64(FILTER_TUPLE_V(
 268                                 cxgb4_select_ntuple(
 269                                         csk->cdev->ports[csk->port_id],
 270                                         csk->l2t)));
 271                 req->rsvd = cpu_to_be32(isn);
 272                 opt2 |= T5_ISS_VALID;
 273                 opt2 |= T5_OPT_2_VALID_F;
 274
 275                 req->opt2 = cpu_to_be32(opt2);
 276
 277                 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
 278                         "csk t5 0x%p, %pI4:%u-%pI4:%u, atid %d, qid %u.\n",
 279                         csk, &req->local_ip, ntohs(req->local_port),
 280                         &req->peer_ip, ntohs(req->peer_port),
 281                         csk->atid, csk->rss_qid);
 282         } else {
 283                 struct cpl_t6_act_open_req *req =
 284                                 (struct cpl_t6_act_open_req *)skb->head;
 285                 u32 isn = (prandom_u32() & ~7UL) - 1;
 286
 287                 INIT_TP_WR(req, 0);
 288                 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ,
 289                                                             qid_atid));
 290                 req->local_port = csk->saddr.sin_port;
 291                 req->peer_port = csk->daddr.sin_port;
 292                 req->local_ip = csk->saddr.sin_addr.s_addr;
 293                 req->peer_ip = csk->daddr.sin_addr.s_addr;
 294                 req->opt0 = cpu_to_be64(opt0);
 295                 req->params = cpu_to_be64(FILTER_TUPLE_V(
 296                                 cxgb4_select_ntuple(
 297                                         csk->cdev->ports[csk->port_id],
 298                                         csk->l2t)));
 299                 req->rsvd = cpu_to_be32(isn);
 300
 301                 opt2 |= T5_ISS_VALID;
 302                 opt2 |= RX_FC_DISABLE_F;
 303                 opt2 |= T5_OPT_2_VALID_F;
 304
 305                 req->opt2 = cpu_to_be32(opt2);
 306                 req->rsvd2 = cpu_to_be32(0);
 307                 req->opt3 = cpu_to_be32(0);
 308
 309                 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
 310                           "csk t6 0x%p, %pI4:%u-%pI4:%u, atid %d, qid %u.\n",
 311                           csk, &req->local_ip, ntohs(req->local_port),
 312                           &req->peer_ip, ntohs(req->peer_port),
 313                           csk->atid, csk->rss_qid);
 314         }
 315
 316         set_wr_txq(skb, CPL_PRIORITY_SETUP, csk->port_id);
 317
 318         pr_info_ipaddr("t%d csk 0x%p,%u,0x%lx,%u, rss_qid %u.\n",
 319                        (&csk->saddr), (&csk->daddr),
 320                        CHELSIO_CHIP_VERSION(lldi->adapter_type), csk,
 321                        csk->state, csk->flags, csk->atid, csk->rss_qid);
 322
 323         cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t);
 324 }
 325
 326 #if IS_ENABLED(CONFIG_IPV6)
 327 static void send_act_open_req6(struct cxgbi_sock *csk, struct sk_buff *skb,
 328                                struct l2t_entry *e)
 329 {
 330         struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev);
 331         int wscale = cxgbi_sock_compute_wscale(csk->mss_idx);
 332         unsigned long long opt0;
 333         unsigned int opt2;
 334         unsigned int qid_atid = ((unsigned int)csk->atid) |
 335                                  (((unsigned int)csk->rss_qid) << 14);
 336
 337         opt0 = KEEP_ALIVE_F |
 338                 WND_SCALE_V(wscale) |
 339                 MSS_IDX_V(csk->mss_idx) |
 340                 L2T_IDX_V(((struct l2t_entry *)csk->l2t)->idx) |
 341                 TX_CHAN_V(csk->tx_chan) |
 342                 SMAC_SEL_V(csk->smac_idx) |
 343                 ULP_MODE_V(ULP_MODE_ISCSI) |
 344                 RCV_BUFSIZ_V(csk->rcv_win >> 10);
 345
 346         opt2 = RX_CHANNEL_V(0) |
 347                 RSS_QUEUE_VALID_F |
 348                 RSS_QUEUE_V(csk->rss_qid);
 349
 350         if (is_t4(lldi->adapter_type)) {
 351                 struct cpl_act_open_req6 *req =
 352                             (struct cpl_act_open_req6 *)skb->head;
 353
 354                 INIT_TP_WR(req, 0);
 355                 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ6,
 356                                                             qid_atid));
 357                 req->local_port = csk->saddr6.sin6_port;
 358                 req->peer_port = csk->daddr6.sin6_port;
 359
 360                 req->local_ip_hi = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr);
 361                 req->local_ip_lo = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr +
 362                                                                     8);
 363                 req->peer_ip_hi = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr);
 364                 req->peer_ip_lo = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr +
 365                                                                     8);
 366
 367                 req->opt0 = cpu_to_be64(opt0);
 368
 369                 opt2 |= RX_FC_VALID_F;
 370                 req->opt2 = cpu_to_be32(opt2);
 371
 372                 req->params = cpu_to_be32(cxgb4_select_ntuple(
 373                                           csk->cdev->ports[csk->port_id],
 374                                           csk->l2t));
 375         } else if (is_t5(lldi->adapter_type)) {
 376                 struct cpl_t5_act_open_req6 *req =
 377                                 (struct cpl_t5_act_open_req6 *)skb->head;
 378
 379                 INIT_TP_WR(req, 0);
 380                 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ6,
 381                                                             qid_atid));
 382                 req->local_port = csk->saddr6.sin6_port;
 383                 req->peer_port = csk->daddr6.sin6_port;
 384                 req->local_ip_hi = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr);
 385                 req->local_ip_lo = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr +
 386                                                                         8);
 387                 req->peer_ip_hi = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr);
 388                 req->peer_ip_lo = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr +
 389                                                                         8);
 390                 req->opt0 = cpu_to_be64(opt0);
 391
 392                 opt2 |= T5_OPT_2_VALID_F;
 393                 req->opt2 = cpu_to_be32(opt2);
 394
 395                 req->params = cpu_to_be64(FILTER_TUPLE_V(cxgb4_select_ntuple(
 396                                           csk->cdev->ports[csk->port_id],
 397                                           csk->l2t)));
 398         } else {
 399                 struct cpl_t6_act_open_req6 *req =
 400                                 (struct cpl_t6_act_open_req6 *)skb->head;
 401
 402                 INIT_TP_WR(req, 0);
 403                 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ6,
 404                                                             qid_atid));
 405                 req->local_port = csk->saddr6.sin6_port;
 406                 req->peer_port = csk->daddr6.sin6_port;
 407                 req->local_ip_hi = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr);
 408                 req->local_ip_lo = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr +
 409                                                                         8);
 410                 req->peer_ip_hi = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr);
 411                 req->peer_ip_lo = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr +
 412                                                                         8);
 413                 req->opt0 = cpu_to_be64(opt0);
 414
 415                 opt2 |= RX_FC_DISABLE_F;
 416                 opt2 |= T5_OPT_2_VALID_F;
 417
 418                 req->opt2 = cpu_to_be32(opt2);
 419
 420                 req->params = cpu_to_be64(FILTER_TUPLE_V(cxgb4_select_ntuple(
 421                                           csk->cdev->ports[csk->port_id],
 422                                           csk->l2t)));
 423
 424                 req->rsvd2 = cpu_to_be32(0);
 425                 req->opt3 = cpu_to_be32(0);
 426         }
 427
 428         set_wr_txq(skb, CPL_PRIORITY_SETUP, csk->port_id);
 429
 430         pr_info("t%d csk 0x%p,%u,0x%lx,%u, [%pI6]:%u-[%pI6]:%u, rss_qid %u.\n",
 431                 CHELSIO_CHIP_VERSION(lldi->adapter_type), csk, csk->state,
 432                 csk->flags, csk->atid,
 433                 &csk->saddr6.sin6_addr, ntohs(csk->saddr.sin_port),
 434                 &csk->daddr6.sin6_addr, ntohs(csk->daddr.sin_port),
 435                 csk->rss_qid);
 436
 437         cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t);
 438 }
 439 #endif
 440
 441 static void send_close_req(struct cxgbi_sock *csk)
 442 {
 443         struct sk_buff *skb = csk->cpl_close;
 444         struct cpl_close_con_req *req = (struct cpl_close_con_req *)skb->head;
 445         unsigned int tid = csk->tid;
 446
 447         log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
 448                 "csk 0x%p,%u,0x%lx, tid %u.\n",
 449                 csk, csk->state, csk->flags, csk->tid);
 450         csk->cpl_close = NULL;
 451         set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id);
 452         INIT_TP_WR(req, tid);
 453         OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_CLOSE_CON_REQ, tid));
 454         req->rsvd = 0;
 455
 456         cxgbi_sock_skb_entail(csk, skb);
 457         if (csk->state >= CTP_ESTABLISHED)
 458                 push_tx_frames(csk, 1);
 459 }
 460
 461 static void abort_arp_failure(void *handle, struct sk_buff *skb)
 462 {
 463         struct cxgbi_sock *csk = (struct cxgbi_sock *)handle;
 464         struct cpl_abort_req *req;
 465
 466         log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
 467                 "csk 0x%p,%u,0x%lx, tid %u, abort.\n",
 468                 csk, csk->state, csk->flags, csk->tid);
 469         req = (struct cpl_abort_req *)skb->data;
 470         req->cmd = CPL_ABORT_NO_RST;
 471         cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
 472 }
 473
 474 static void send_abort_req(struct cxgbi_sock *csk)
 475 {
 476         struct cpl_abort_req *req;
 477         struct sk_buff *skb = csk->cpl_abort_req;
 478
 479         if (unlikely(csk->state == CTP_ABORTING) || !skb || !csk->cdev)
 480                 return;
 481
 482         if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT)) {
 483                 send_tx_flowc_wr(csk);
 484                 cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT);
 485         }
 486
 487         cxgbi_sock_set_state(csk, CTP_ABORTING);
 488         cxgbi_sock_set_flag(csk, CTPF_ABORT_RPL_PENDING);
 489         cxgbi_sock_purge_write_queue(csk);
 490
 491         csk->cpl_abort_req = NULL;
 492         req = (struct cpl_abort_req *)skb->head;
 493         set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id);
 494         req->cmd = CPL_ABORT_SEND_RST;
 495         t4_set_arp_err_handler(skb, csk, abort_arp_failure);
 496         INIT_TP_WR(req, csk->tid);
 497         OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_REQ, csk->tid));
 498         req->rsvd0 = htonl(csk->snd_nxt);
 499         req->rsvd1 = !cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT);
 500
 501         log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
 502                 "csk 0x%p,%u,0x%lx,%u, snd_nxt %u, 0x%x.\n",
 503                 csk, csk->state, csk->flags, csk->tid, csk->snd_nxt,
 504                 req->rsvd1);
 505
 506         cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t);
 507 }
 508
 509 static void send_abort_rpl(struct cxgbi_sock *csk, int rst_status)
 510 {
 511         struct sk_buff *skb = csk->cpl_abort_rpl;
 512         struct cpl_abort_rpl *rpl = (struct cpl_abort_rpl *)skb->head;
 513
 514         log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
 515                 "csk 0x%p,%u,0x%lx,%u, status %d.\n",
 516                 csk, csk->state, csk->flags, csk->tid, rst_status);
 517
 518         csk->cpl_abort_rpl = NULL;
 519         set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id);
 520         INIT_TP_WR(rpl, csk->tid);
 521         OPCODE_TID(rpl) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_RPL, csk->tid));
 522         rpl->cmd = rst_status;
 523         cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
 524 }
 525
 526 /*
 527  * CPL connection rx data ack: host ->
 528  * Send RX credits through an RX_DATA_ACK CPL message. Returns the number of
 529  * credits sent.
 530  */
 531 static u32 send_rx_credits(struct cxgbi_sock *csk, u32 credits)
 532 {
 533         struct sk_buff *skb;
 534         struct cpl_rx_data_ack *req;
 535
 536         log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
 537                 "csk 0x%p,%u,0x%lx,%u, credit %u.\n",
 538                 csk, csk->state, csk->flags, csk->tid, credits);
 539
 540         skb = alloc_wr(sizeof(*req), 0, GFP_ATOMIC);
 541         if (!skb) {
 542                 pr_info("csk 0x%p, credit %u, OOM.\n", csk, credits);
 543                 return 0;
 544         }
 545         req = (struct cpl_rx_data_ack *)skb->head;
 546
 547         set_wr_txq(skb, CPL_PRIORITY_ACK, csk->port_id);
 548         INIT_TP_WR(req, csk->tid);
 549         OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_RX_DATA_ACK,
 550                                       csk->tid));
 551         req->credit_dack = cpu_to_be32(RX_CREDITS_V(credits)
 552                                        | RX_FORCE_ACK_F);
 553         cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
 554         return credits;
 555 }
 556
 557 /*
 558  * sgl_len - calculates the size of an SGL of the given capacity
 559  * @n: the number of SGL entries
 560  * Calculates the number of flits needed for a scatter/gather list that
 561  * can hold the given number of entries.
 562  */
 563 static inline unsigned int sgl_len(unsigned int n)
 564 {
 565         n--;
 566         return (3 * n) / 2 + (n & 1) + 2;
 567 }
 568
 569 /*
 570  * calc_tx_flits_ofld - calculate # of flits for an offload packet
 571  * @skb: the packet
 572  *
 573  * Returns the number of flits needed for the given offload packet.
 574  * These packets are already fully constructed and no additional headers
 575  * will be added.
 576  */
 577 static inline unsigned int calc_tx_flits_ofld(const struct sk_buff *skb)
 578 {
 579         unsigned int flits, cnt;
 580
 581         if (is_ofld_imm(skb))
 582                 return DIV_ROUND_UP(skb->len, 8);
 583         flits = skb_transport_offset(skb) / 8;
 584         cnt = skb_shinfo(skb)->nr_frags;
 585         if (skb_tail_pointer(skb) != skb_transport_header(skb))
 586                 cnt++;
 587         return flits + sgl_len(cnt);
 588 }
 589
 590 #define FLOWC_WR_NPARAMS_MIN    9
 591 static inline int tx_flowc_wr_credits(int *nparamsp, int *flowclenp)
 592 {
 593         int nparams, flowclen16, flowclen;
 594
 595         nparams = FLOWC_WR_NPARAMS_MIN;
 596 #ifdef CONFIG_CHELSIO_T4_DCB
 597         nparams++;
 598 #endif
 599         flowclen = offsetof(struct fw_flowc_wr, mnemval[nparams]);
 600         flowclen16 = DIV_ROUND_UP(flowclen, 16);
 601         flowclen = flowclen16 * 16;
 602         /*
 603          * Return the number of 16-byte credits used by the FlowC request.
 604          * Pass back the nparams and actual FlowC length if requested.
 605          */
 606         if (nparamsp)
 607                 *nparamsp = nparams;
 608         if (flowclenp)
 609                 *flowclenp = flowclen;
 610
 611         return flowclen16;
 612 }
 613
 614 static inline int send_tx_flowc_wr(struct cxgbi_sock *csk)
 615 {
 616         struct sk_buff *skb;
 617         struct fw_flowc_wr *flowc;
 618         int nparams, flowclen16, flowclen;
 619
 620 #ifdef CONFIG_CHELSIO_T4_DCB
 621         u16 vlan = ((struct l2t_entry *)csk->l2t)->vlan;
 622 #endif
 623         flowclen16 = tx_flowc_wr_credits(&nparams, &flowclen);
 624         skb = alloc_wr(flowclen, 0, GFP_ATOMIC);
 625         flowc = (struct fw_flowc_wr *)skb->head;
 626         flowc->op_to_nparams =
 627                 htonl(FW_WR_OP_V(FW_FLOWC_WR) | FW_FLOWC_WR_NPARAMS_V(nparams));
 628         flowc->flowid_len16 =
 629                 htonl(FW_WR_LEN16_V(flowclen16) | FW_WR_FLOWID_V(csk->tid));
 630         flowc->mnemval[0].mnemonic = FW_FLOWC_MNEM_PFNVFN;
 631         flowc->mnemval[0].val = htonl(csk->cdev->pfvf);
 632         flowc->mnemval[1].mnemonic = FW_FLOWC_MNEM_CH;
 633         flowc->mnemval[1].val = htonl(csk->tx_chan);
 634         flowc->mnemval[2].mnemonic = FW_FLOWC_MNEM_PORT;
 635         flowc->mnemval[2].val = htonl(csk->tx_chan);
 636         flowc->mnemval[3].mnemonic = FW_FLOWC_MNEM_IQID;
 637         flowc->mnemval[3].val = htonl(csk->rss_qid);
 638         flowc->mnemval[4].mnemonic = FW_FLOWC_MNEM_SNDNXT;
 639         flowc->mnemval[4].val = htonl(csk->snd_nxt);
 640         flowc->mnemval[5].mnemonic = FW_FLOWC_MNEM_RCVNXT;
 641         flowc->mnemval[5].val = htonl(csk->rcv_nxt);
 642         flowc->mnemval[6].mnemonic = FW_FLOWC_MNEM_SNDBUF;
 643         flowc->mnemval[6].val = htonl(csk->snd_win);
 644         flowc->mnemval[7].mnemonic = FW_FLOWC_MNEM_MSS;
 645         flowc->mnemval[7].val = htonl(csk->advmss);
 646         flowc->mnemval[8].mnemonic = 0;
 647         flowc->mnemval[8].val = 0;
 648         flowc->mnemval[8].mnemonic = FW_FLOWC_MNEM_TXDATAPLEN_MAX;
 649         if (csk->cdev->skb_iso_txhdr)
 650                 flowc->mnemval[8].val = cpu_to_be32(CXGBI_MAX_ISO_DATA_IN_SKB);
 651         else
 652                 flowc->mnemval[8].val = cpu_to_be32(16128);
 653 #ifdef CONFIG_CHELSIO_T4_DCB
 654         flowc->mnemval[9].mnemonic = FW_FLOWC_MNEM_DCBPRIO;
 655         if (vlan == CPL_L2T_VLAN_NONE) {
 656                 pr_warn_ratelimited("csk %u without VLAN Tag on DCB Link\n",
 657                                     csk->tid);
 658                 flowc->mnemval[9].val = cpu_to_be32(0);
 659         } else {
 660                 flowc->mnemval[9].val = cpu_to_be32((vlan & VLAN_PRIO_MASK) >>
 661                                         VLAN_PRIO_SHIFT);
 662         }
 663 #endif
 664
 665         set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id);
 666
 667         log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
 668                 "csk 0x%p, tid 0x%x, %u,%u,%u,%u,%u,%u,%u.\n",
 669                 csk, csk->tid, 0, csk->tx_chan, csk->rss_qid,
 670                 csk->snd_nxt, csk->rcv_nxt, csk->snd_win,
 671                 csk->advmss);
 672
 673         cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
 674
 675         return flowclen16;
 676 }
 677
 678 static void
 679 cxgb4i_make_tx_iso_cpl(struct sk_buff *skb, struct cpl_tx_data_iso *cpl)
 680 {
 681         struct cxgbi_iso_info *info = (struct cxgbi_iso_info *)skb->head;
 682         u32 imm_en = !!(info->flags & CXGBI_ISO_INFO_IMM_ENABLE);
 683         u32 fslice = !!(info->flags & CXGBI_ISO_INFO_FSLICE);
 684         u32 lslice = !!(info->flags & CXGBI_ISO_INFO_LSLICE);
 685         u32 pdu_type = (info->op == ISCSI_OP_SCSI_CMD) ? 0 : 1;
 686         u32 submode = cxgbi_skcb_tx_ulp_mode(skb) & 0x3;
 687
 688         cpl->op_to_scsi = cpu_to_be32(CPL_TX_DATA_ISO_OP_V(CPL_TX_DATA_ISO) |
 689                                 CPL_TX_DATA_ISO_FIRST_V(fslice) |
 690                                 CPL_TX_DATA_ISO_LAST_V(lslice) |
 691                                 CPL_TX_DATA_ISO_CPLHDRLEN_V(0) |
 692                                 CPL_TX_DATA_ISO_HDRCRC_V(submode & 1) |
 693                                 CPL_TX_DATA_ISO_PLDCRC_V(((submode >> 1) & 1)) |
 694                                 CPL_TX_DATA_ISO_IMMEDIATE_V(imm_en) |
 695                                 CPL_TX_DATA_ISO_SCSI_V(pdu_type));
 696
 697         cpl->ahs_len = info->ahs;
 698         cpl->mpdu = cpu_to_be16(DIV_ROUND_UP(info->mpdu, 4));
 699         cpl->burst_size = cpu_to_be32(info->burst_size);
 700         cpl->len = cpu_to_be32(info->len);
 701         cpl->reserved2_seglen_offset =
 702              cpu_to_be32(CPL_TX_DATA_ISO_SEGLEN_OFFSET_V(info->segment_offset));
 703         cpl->datasn_offset = cpu_to_be32(info->datasn_offset);
 704         cpl->buffer_offset = cpu_to_be32(info->buffer_offset);
 705         cpl->reserved3 = cpu_to_be32(0);
 706         log_debug(1 << CXGBI_DBG_ISCSI | 1 << CXGBI_DBG_PDU_TX,
 707                   "iso: flags 0x%x, op %u, ahs %u, num_pdu %u, mpdu %u, "
 708                   "burst_size %u, iso_len %u\n",
 709                   info->flags, info->op, info->ahs, info->num_pdu,
 710                   info->mpdu, info->burst_size << 2, info->len);
 711 }
 712
 713 static void
 714 cxgb4i_make_tx_data_wr(struct cxgbi_sock *csk, struct sk_buff *skb, int dlen,
 715                        int len, u32 credits, int compl)
 716 {
 717         struct cxgbi_device *cdev = csk->cdev;
 718         struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
 719         struct fw_ofld_tx_data_wr *req;
 720         struct cpl_tx_data_iso *cpl;
 721         u32 submode = cxgbi_skcb_tx_ulp_mode(skb) & 0x3;
 722         u32 wr_ulp_mode = 0;
 723         u32 hdr_size = sizeof(*req);
 724         u32 opcode = FW_OFLD_TX_DATA_WR;
 725         u32 immlen = 0;
 726         u32 force = is_t5(lldi->adapter_type) ? TX_FORCE_V(!submode) :
 727                                                 T6_TX_FORCE_F;
 728
 729         if (cxgbi_skcb_test_flag(skb, SKCBF_TX_ISO)) {
 730                 hdr_size += sizeof(struct cpl_tx_data_iso);
 731                 opcode = FW_ISCSI_TX_DATA_WR;
 732                 immlen += sizeof(struct cpl_tx_data_iso);
 733                 submode |= 8;
 734         }
 735
 736         if (is_ofld_imm(skb))
 737                 immlen += dlen;
 738
 739         req = (struct fw_ofld_tx_data_wr *)__skb_push(skb, hdr_size);
 740         req->op_to_immdlen = cpu_to_be32(FW_WR_OP_V(opcode) |
 741                                          FW_WR_COMPL_V(compl) |
 742                                          FW_WR_IMMDLEN_V(immlen));
 743         req->flowid_len16 = cpu_to_be32(FW_WR_FLOWID_V(csk->tid) |
 744                                         FW_WR_LEN16_V(credits));
 745         req->plen = cpu_to_be32(len);
 746         cpl =  (struct cpl_tx_data_iso *)(req + 1);
 747
 748         if (likely(cxgbi_skcb_test_flag(skb, SKCBF_TX_ISO)))
 749                 cxgb4i_make_tx_iso_cpl(skb, cpl);
 750
 751         if (submode)
 752                 wr_ulp_mode = FW_OFLD_TX_DATA_WR_ULPMODE_V(ULP2_MODE_ISCSI) |
 753                               FW_OFLD_TX_DATA_WR_ULPSUBMODE_V(submode);
 754
 755         req->tunnel_to_proxy = cpu_to_be32(wr_ulp_mode | force |
 756                                            FW_OFLD_TX_DATA_WR_SHOVE_V(1U));
 757
 758         if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT))
 759                 cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT);
 760 }
 761
 762 static void arp_failure_skb_discard(void *handle, struct sk_buff *skb)
 763 {
 764         kfree_skb(skb);
 765 }
 766
 767 static int push_tx_frames(struct cxgbi_sock *csk, int req_completion)
 768 {
 769         int total_size = 0;
 770         struct sk_buff *skb;
 771
 772         if (unlikely(csk->state < CTP_ESTABLISHED ||
 773                 csk->state == CTP_CLOSE_WAIT_1 || csk->state >= CTP_ABORTING)) {
 774                 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK |
 775                           1 << CXGBI_DBG_PDU_TX,
 776                           "csk 0x%p,%u,0x%lx,%u, in closing state.\n",
 777                           csk, csk->state, csk->flags, csk->tid);
 778                 return 0;
 779         }
 780
 781         while (csk->wr_cred && ((skb = skb_peek(&csk->write_queue)) != NULL)) {
 782                 struct cxgbi_iso_info *iso_cpl;
 783                 u32 dlen = skb->len;
 784                 u32 len = skb->len;
 785                 u32 iso_cpl_len = 0;
 786                 u32 flowclen16 = 0;
 787                 u32 credits_needed;
 788                 u32 num_pdu = 1, hdr_len;
 789
 790                 if (cxgbi_skcb_test_flag(skb, SKCBF_TX_ISO))
 791                         iso_cpl_len = sizeof(struct cpl_tx_data_iso);
 792
 793                 if (is_ofld_imm(skb))
 794                         credits_needed = DIV_ROUND_UP(dlen + iso_cpl_len, 16);
 795                 else
 796                         credits_needed =
 797                                 DIV_ROUND_UP((8 * calc_tx_flits_ofld(skb)) +
 798                                              iso_cpl_len, 16);
 799
 800                 if (likely(cxgbi_skcb_test_flag(skb, SKCBF_TX_NEED_HDR)))
 801                         credits_needed +=
 802                            DIV_ROUND_UP(sizeof(struct fw_ofld_tx_data_wr), 16);
 803
 804                 /*
 805                  * Assumes the initial credits is large enough to support
 806                  * fw_flowc_wr plus largest possible first payload
 807                  */
 808                 if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT)) {
 809                         flowclen16 = send_tx_flowc_wr(csk);
 810                         csk->wr_cred -= flowclen16;
 811                         csk->wr_una_cred += flowclen16;
 812                         cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT);
 813                 }
 814
 815                 if (csk->wr_cred < credits_needed) {
 816                         log_debug(1 << CXGBI_DBG_PDU_TX,
 817                                   "csk 0x%p, skb %u/%u, wr %d < %u.\n",
 818                                   csk, skb->len, skb->data_len,
 819                                   credits_needed, csk->wr_cred);
 820
 821                         csk->no_tx_credits++;
 822                         break;
 823                 }
 824
 825                 csk->no_tx_credits = 0;
 826
 827                 __skb_unlink(skb, &csk->write_queue);
 828                 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id);
 829                 skb->csum = (__force __wsum)(credits_needed + flowclen16);
 830                 csk->wr_cred -= credits_needed;
 831                 csk->wr_una_cred += credits_needed;
 832                 cxgbi_sock_enqueue_wr(csk, skb);
 833
 834                 log_debug(1 << CXGBI_DBG_PDU_TX,
 835                         "csk 0x%p, skb %u/%u, wr %d, left %u, unack %u.\n",
 836                         csk, skb->len, skb->data_len, credits_needed,
 837                         csk->wr_cred, csk->wr_una_cred);
 838
 839                 if (!req_completion &&
 840                     ((csk->wr_una_cred >= (csk->wr_max_cred / 2)) ||
 841                      after(csk->write_seq, (csk->snd_una + csk->snd_win / 2))))
 842                         req_completion = 1;
 843
 844                 if (likely(cxgbi_skcb_test_flag(skb, SKCBF_TX_NEED_HDR))) {
 845                         u32 ulp_mode = cxgbi_skcb_tx_ulp_mode(skb);
 846
 847                         if (cxgbi_skcb_test_flag(skb, SKCBF_TX_ISO)) {
 848                                 iso_cpl = (struct cxgbi_iso_info *)skb->head;
 849                                 num_pdu = iso_cpl->num_pdu;
 850                                 hdr_len = cxgbi_skcb_tx_iscsi_hdrlen(skb);
 851                                 len += (cxgbi_ulp_extra_len(ulp_mode) * num_pdu) +
 852                                        (hdr_len * (num_pdu - 1));
 853                         } else {
 854                                 len += cxgbi_ulp_extra_len(ulp_mode);
 855                         }
 856
 857                         cxgb4i_make_tx_data_wr(csk, skb, dlen, len,
 858                                                credits_needed, req_completion);
 859                         csk->snd_nxt += len;
 860                         cxgbi_skcb_clear_flag(skb, SKCBF_TX_NEED_HDR);
 861                 } else if (cxgbi_skcb_test_flag(skb, SKCBF_TX_FLAG_COMPL) &&
 862                            (csk->wr_una_cred >= (csk->wr_max_cred / 2))) {
 863                         struct cpl_close_con_req *req =
 864                                 (struct cpl_close_con_req *)skb->data;
 865
 866                         req->wr.wr_hi |= cpu_to_be32(FW_WR_COMPL_F);
 867                 }
 868
 869                 total_size += skb->truesize;
 870                 t4_set_arp_err_handler(skb, csk, arp_failure_skb_discard);
 871
 872                 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_TX,
 873                           "csk 0x%p,%u,0x%lx,%u, skb 0x%p, %u.\n",
 874                           csk, csk->state, csk->flags, csk->tid, skb, len);
 875                 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t);
 876         }
 877         return total_size;
 878 }
 879
 880 static inline void free_atid(struct cxgbi_sock *csk)
 881 {
 882         struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev);
 883
 884         if (cxgbi_sock_flag(csk, CTPF_HAS_ATID)) {
 885                 cxgb4_free_atid(lldi->tids, csk->atid);
 886                 cxgbi_sock_clear_flag(csk, CTPF_HAS_ATID);
 887                 cxgbi_sock_put(csk);
 888         }
 889 }
 890
 891 static void do_act_establish(struct cxgbi_device *cdev, struct sk_buff *skb)
 892 {
 893         struct cxgbi_sock *csk;
 894         struct cpl_act_establish *req = (struct cpl_act_establish *)skb->data;
 895         unsigned short tcp_opt = ntohs(req->tcp_opt);
 896         unsigned int tid = GET_TID(req);
 897         unsigned int atid = TID_TID_G(ntohl(req->tos_atid));
 898         struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
 899         struct tid_info *t = lldi->tids;
 900         u32 rcv_isn = be32_to_cpu(req->rcv_isn);
 901
 902         csk = lookup_atid(t, atid);
 903         if (unlikely(!csk)) {
 904                 pr_err("NO conn. for atid %u, cdev 0x%p.\n", atid, cdev);
 905                 goto rel_skb;
 906         }
 907
 908         if (csk->atid != atid) {
 909                 pr_err("bad conn atid %u, csk 0x%p,%u,0x%lx,tid %u, atid %u.\n",
 910                         atid, csk, csk->state, csk->flags, csk->tid, csk->atid);
 911                 goto rel_skb;
 912         }
 913
 914         pr_info_ipaddr("atid 0x%x, tid 0x%x, csk 0x%p,%u,0x%lx, isn %u.\n",
 915                        (&csk->saddr), (&csk->daddr),
 916                        atid, tid, csk, csk->state, csk->flags, rcv_isn);
 917
 918         module_put(cdev->owner);
 919
 920         cxgbi_sock_get(csk);
 921         csk->tid = tid;
 922         cxgb4_insert_tid(lldi->tids, csk, tid, csk->csk_family);
 923         cxgbi_sock_set_flag(csk, CTPF_HAS_TID);
 924
 925         free_atid(csk);
 926
 927         spin_lock_bh(&csk->lock);
 928         if (unlikely(csk->state != CTP_ACTIVE_OPEN))
 929                 pr_info("csk 0x%p,%u,0x%lx,%u, got EST.\n",
 930                         csk, csk->state, csk->flags, csk->tid);
 931
 932         if (csk->retry_timer.function) {
 933                 del_timer(&csk->retry_timer);
 934                 csk->retry_timer.function = NULL;
 935         }
 936
 937         csk->copied_seq = csk->rcv_wup = csk->rcv_nxt = rcv_isn;
 938         /*
 939          * Causes the first RX_DATA_ACK to supply any Rx credits we couldn't
 940          * pass through opt0.
 941          */
 942         if (csk->rcv_win > (RCV_BUFSIZ_MASK << 10))
 943                 csk->rcv_wup -= csk->rcv_win - (RCV_BUFSIZ_MASK << 10);
 944
 945         csk->advmss = lldi->mtus[TCPOPT_MSS_G(tcp_opt)] - 40;
 946         if (TCPOPT_TSTAMP_G(tcp_opt))
 947                 csk->advmss -= 12;
 948         if (csk->advmss < 128)
 949                 csk->advmss = 128;
 950
 951         log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
 952                 "csk 0x%p, mss_idx %u, advmss %u.\n",
 953                         csk, TCPOPT_MSS_G(tcp_opt), csk->advmss);
 954
 955         cxgbi_sock_established(csk, ntohl(req->snd_isn), ntohs(req->tcp_opt));
 956
 957         if (unlikely(cxgbi_sock_flag(csk, CTPF_ACTIVE_CLOSE_NEEDED)))
 958                 send_abort_req(csk);
 959         else {
 960                 if (skb_queue_len(&csk->write_queue))
 961                         push_tx_frames(csk, 0);
 962                 cxgbi_conn_tx_open(csk);
 963         }
 964         spin_unlock_bh(&csk->lock);
 965
 966 rel_skb:
 967         __kfree_skb(skb);
 968 }
 969
 970 static int act_open_rpl_status_to_errno(int status)
 971 {
 972         switch (status) {
 973         case CPL_ERR_CONN_RESET:
 974                 return -ECONNREFUSED;
 975         case CPL_ERR_ARP_MISS:
 976                 return -EHOSTUNREACH;
 977         case CPL_ERR_CONN_TIMEDOUT:
 978                 return -ETIMEDOUT;
 979         case CPL_ERR_TCAM_FULL:
 980                 return -ENOMEM;
 981         case CPL_ERR_CONN_EXIST:
 982                 return -EADDRINUSE;
 983         default:
 984                 return -EIO;
 985         }
 986 }
 987
 988 static void csk_act_open_retry_timer(struct timer_list *t)
 989 {
 990         struct sk_buff *skb = NULL;
 991         struct cxgbi_sock *csk = from_timer(csk, t, retry_timer);
 992         struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev);
 993         void (*send_act_open_func)(struct cxgbi_sock *, struct sk_buff *,
 994                                    struct l2t_entry *);
 995         int t4 = is_t4(lldi->adapter_type), size, size6;
 996
 997         log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
 998                 "csk 0x%p,%u,0x%lx,%u.\n",
 999                 csk, csk->state, csk->flags, csk->tid);
1000
1001         cxgbi_sock_get(csk);
1002         spin_lock_bh(&csk->lock);
1003
1004         if (t4) {
1005                 size = sizeof(struct cpl_act_open_req);
1006                 size6 = sizeof(struct cpl_act_open_req6);
1007         } else {
1008                 size = sizeof(struct cpl_t5_act_open_req);
1009                 size6 = sizeof(struct cpl_t5_act_open_req6);
1010         }
1011
1012         if (csk->csk_family == AF_INET) {
1013                 send_act_open_func = send_act_open_req;
1014                 skb = alloc_wr(size, 0, GFP_ATOMIC);
1015 #if IS_ENABLED(CONFIG_IPV6)
1016         } else {
1017                 send_act_open_func = send_act_open_req6;
1018                 skb = alloc_wr(size6, 0, GFP_ATOMIC);
1019 #endif
1020         }
1021
1022         if (!skb)
1023                 cxgbi_sock_fail_act_open(csk, -ENOMEM);
1024         else {
1025                 skb->sk = (struct sock *)csk;
1026                 t4_set_arp_err_handler(skb, csk,
1027                                        cxgbi_sock_act_open_req_arp_failure);
1028                 send_act_open_func(csk, skb, csk->l2t);
1029         }
1030
1031         spin_unlock_bh(&csk->lock);
1032         cxgbi_sock_put(csk);
1033
1034 }
1035
1036 static inline bool is_neg_adv(unsigned int status)
1037 {
1038         return status == CPL_ERR_RTX_NEG_ADVICE ||
1039                 status == CPL_ERR_KEEPALV_NEG_ADVICE ||
1040                 status == CPL_ERR_PERSIST_NEG_ADVICE;
1041 }
1042
1043 static void do_act_open_rpl(struct cxgbi_device *cdev, struct sk_buff *skb)
1044 {
1045         struct cxgbi_sock *csk;
1046         struct cpl_act_open_rpl *rpl = (struct cpl_act_open_rpl *)skb->data;
1047         unsigned int tid = GET_TID(rpl);
1048         unsigned int atid =
1049                 TID_TID_G(AOPEN_ATID_G(be32_to_cpu(rpl->atid_status)));
1050         unsigned int status = AOPEN_STATUS_G(be32_to_cpu(rpl->atid_status));
1051         struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1052         struct tid_info *t = lldi->tids;
1053
1054         csk = lookup_atid(t, atid);
1055         if (unlikely(!csk)) {
1056                 pr_err("NO matching conn. atid %u, tid %u.\n", atid, tid);
1057                 goto rel_skb;
1058         }
1059
1060         pr_info_ipaddr("tid %u/%u, status %u.\n"
1061                        "csk 0x%p,%u,0x%lx. ", (&csk->saddr), (&csk->daddr),
1062                        atid, tid, status, csk, csk->state, csk->flags);
1063
1064         if (is_neg_adv(status))
1065                 goto rel_skb;
1066
1067         module_put(cdev->owner);
1068
1069         if (status && status != CPL_ERR_TCAM_FULL &&
1070             status != CPL_ERR_CONN_EXIST &&
1071             status != CPL_ERR_ARP_MISS)
1072                 cxgb4_remove_tid(lldi->tids, csk->port_id, GET_TID(rpl),
1073                                  csk->csk_family);
1074
1075         cxgbi_sock_get(csk);
1076         spin_lock_bh(&csk->lock);
1077
1078         if (status == CPL_ERR_CONN_EXIST &&
1079             csk->retry_timer.function != csk_act_open_retry_timer) {
1080                 csk->retry_timer.function = csk_act_open_retry_timer;
1081                 mod_timer(&csk->retry_timer, jiffies + HZ / 2);
1082         } else
1083                 cxgbi_sock_fail_act_open(csk,
1084                                         act_open_rpl_status_to_errno(status));
1085
1086         spin_unlock_bh(&csk->lock);
1087         cxgbi_sock_put(csk);
1088 rel_skb:
1089         __kfree_skb(skb);
1090 }
1091
1092 static void do_peer_close(struct cxgbi_device *cdev, struct sk_buff *skb)
1093 {
1094         struct cxgbi_sock *csk;
1095         struct cpl_peer_close *req = (struct cpl_peer_close *)skb->data;
1096         unsigned int tid = GET_TID(req);
1097         struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1098         struct tid_info *t = lldi->tids;
1099
1100         csk = lookup_tid(t, tid);
1101         if (unlikely(!csk)) {
1102                 pr_err("can't find connection for tid %u.\n", tid);
1103                 goto rel_skb;
1104         }
1105         pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u.\n",
1106                        (&csk->saddr), (&csk->daddr),
1107                        csk, csk->state, csk->flags, csk->tid);
1108         cxgbi_sock_rcv_peer_close(csk);
1109 rel_skb:
1110         __kfree_skb(skb);
1111 }
1112
1113 static void do_close_con_rpl(struct cxgbi_device *cdev, struct sk_buff *skb)
1114 {
1115         struct cxgbi_sock *csk;
1116         struct cpl_close_con_rpl *rpl = (struct cpl_close_con_rpl *)skb->data;
1117         unsigned int tid = GET_TID(rpl);
1118         struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1119         struct tid_info *t = lldi->tids;
1120
1121         csk = lookup_tid(t, tid);
1122         if (unlikely(!csk)) {
1123                 pr_err("can't find connection for tid %u.\n", tid);
1124                 goto rel_skb;
1125         }
1126         pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u.\n",
1127                        (&csk->saddr), (&csk->daddr),
1128                        csk, csk->state, csk->flags, csk->tid);
1129         cxgbi_sock_rcv_close_conn_rpl(csk, ntohl(rpl->snd_nxt));
1130 rel_skb:
1131         __kfree_skb(skb);
1132 }
1133
1134 static int abort_status_to_errno(struct cxgbi_sock *csk, int abort_reason,
1135                                                                 int *need_rst)
1136 {
1137         switch (abort_reason) {
1138         case CPL_ERR_BAD_SYN:
1139         case CPL_ERR_CONN_RESET:
1140                 return csk->state > CTP_ESTABLISHED ?
1141                         -EPIPE : -ECONNRESET;
1142         case CPL_ERR_XMIT_TIMEDOUT:
1143         case CPL_ERR_PERSIST_TIMEDOUT:
1144         case CPL_ERR_FINWAIT2_TIMEDOUT:
1145         case CPL_ERR_KEEPALIVE_TIMEDOUT:
1146                 return -ETIMEDOUT;
1147         default:
1148                 return -EIO;
1149         }
1150 }
1151
1152 static void do_abort_req_rss(struct cxgbi_device *cdev, struct sk_buff *skb)
1153 {
1154         struct cxgbi_sock *csk;
1155         struct cpl_abort_req_rss *req = (struct cpl_abort_req_rss *)skb->data;
1156         unsigned int tid = GET_TID(req);
1157         struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1158         struct tid_info *t = lldi->tids;
1159         int rst_status = CPL_ABORT_NO_RST;
1160
1161         csk = lookup_tid(t, tid);
1162         if (unlikely(!csk)) {
1163                 pr_err("can't find connection for tid %u.\n", tid);
1164                 goto rel_skb;
1165         }
1166
1167         pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u, status %u.\n",
1168                        (&csk->saddr), (&csk->daddr),
1169                        csk, csk->state, csk->flags, csk->tid, req->status);
1170
1171         if (is_neg_adv(req->status))
1172                 goto rel_skb;
1173
1174         cxgbi_sock_get(csk);
1175         spin_lock_bh(&csk->lock);
1176
1177         cxgbi_sock_clear_flag(csk, CTPF_ABORT_REQ_RCVD);
1178
1179         if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT)) {
1180                 send_tx_flowc_wr(csk);
1181                 cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT);
1182         }
1183
1184         cxgbi_sock_set_flag(csk, CTPF_ABORT_REQ_RCVD);
1185         cxgbi_sock_set_state(csk, CTP_ABORTING);
1186
1187         send_abort_rpl(csk, rst_status);
1188
1189         if (!cxgbi_sock_flag(csk, CTPF_ABORT_RPL_PENDING)) {
1190                 csk->err = abort_status_to_errno(csk, req->status, &rst_status);
1191                 cxgbi_sock_closed(csk);
1192         }
1193
1194         spin_unlock_bh(&csk->lock);
1195         cxgbi_sock_put(csk);
1196 rel_skb:
1197         __kfree_skb(skb);
1198 }
1199
1200 static void do_abort_rpl_rss(struct cxgbi_device *cdev, struct sk_buff *skb)
1201 {
1202         struct cxgbi_sock *csk;
1203         struct cpl_abort_rpl_rss *rpl = (struct cpl_abort_rpl_rss *)skb->data;
1204         unsigned int tid = GET_TID(rpl);
1205         struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1206         struct tid_info *t = lldi->tids;
1207
1208         csk = lookup_tid(t, tid);
1209         if (!csk)
1210                 goto rel_skb;
1211
1212         pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u, status %u.\n",
1213                        (&csk->saddr), (&csk->daddr), csk,
1214                        csk->state, csk->flags, csk->tid, rpl->status);
1215
1216         if (rpl->status == CPL_ERR_ABORT_FAILED)
1217                 goto rel_skb;
1218
1219         cxgbi_sock_rcv_abort_rpl(csk);
1220 rel_skb:
1221         __kfree_skb(skb);
1222 }
1223
1224 static void do_rx_data(struct cxgbi_device *cdev, struct sk_buff *skb)
1225 {
1226         struct cxgbi_sock *csk;
1227         struct cpl_rx_data *cpl = (struct cpl_rx_data *)skb->data;
1228         unsigned int tid = GET_TID(cpl);
1229         struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1230         struct tid_info *t = lldi->tids;
1231
1232         csk = lookup_tid(t, tid);
1233         if (!csk) {
1234                 pr_err("can't find connection for tid %u.\n", tid);
1235         } else {
1236                 /* not expecting this, reset the connection. */
1237                 pr_err("csk 0x%p, tid %u, rcv cpl_rx_data.\n", csk, tid);
1238                 spin_lock_bh(&csk->lock);
1239                 send_abort_req(csk);
1240                 spin_unlock_bh(&csk->lock);
1241         }
1242         __kfree_skb(skb);
1243 }
1244
1245 static void do_rx_iscsi_hdr(struct cxgbi_device *cdev, struct sk_buff *skb)
1246 {
1247         struct cxgbi_sock *csk;
1248         struct cpl_iscsi_hdr *cpl = (struct cpl_iscsi_hdr *)skb->data;
1249         unsigned short pdu_len_ddp = be16_to_cpu(cpl->pdu_len_ddp);
1250         unsigned int tid = GET_TID(cpl);
1251         struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1252         struct tid_info *t = lldi->tids;
1253
1254         csk = lookup_tid(t, tid);
1255         if (unlikely(!csk)) {
1256                 pr_err("can't find conn. for tid %u.\n", tid);
1257                 goto rel_skb;
1258         }
1259
1260         log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
1261                 "csk 0x%p,%u,0x%lx, tid %u, skb 0x%p,%u, 0x%x.\n",
1262                 csk, csk->state, csk->flags, csk->tid, skb, skb->len,
1263                 pdu_len_ddp);
1264
1265         spin_lock_bh(&csk->lock);
1266
1267         if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) {
1268                 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1269                         "csk 0x%p,%u,0x%lx,%u, bad state.\n",
1270                         csk, csk->state, csk->flags, csk->tid);
1271                 if (csk->state != CTP_ABORTING)
1272                         goto abort_conn;
1273                 else
1274                         goto discard;
1275         }
1276
1277         cxgbi_skcb_tcp_seq(skb) = ntohl(cpl->seq);
1278         cxgbi_skcb_flags(skb) = 0;
1279
1280         skb_reset_transport_header(skb);
1281         __skb_pull(skb, sizeof(*cpl));
1282         __pskb_trim(skb, ntohs(cpl->len));
1283
1284         if (!csk->skb_ulp_lhdr) {
1285                 unsigned char *bhs;
1286                 unsigned int hlen, dlen, plen;
1287
1288                 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
1289                         "csk 0x%p,%u,0x%lx, tid %u, skb 0x%p header.\n",
1290                         csk, csk->state, csk->flags, csk->tid, skb);
1291                 csk->skb_ulp_lhdr = skb;
1292                 cxgbi_skcb_set_flag(skb, SKCBF_RX_HDR);
1293
1294                 if ((CHELSIO_CHIP_VERSION(lldi->adapter_type) <= CHELSIO_T5) &&
1295                     (cxgbi_skcb_tcp_seq(skb) != csk->rcv_nxt)) {
1296                         pr_info("tid %u, CPL_ISCSI_HDR, bad seq, 0x%x/0x%x.\n",
1297                                 csk->tid, cxgbi_skcb_tcp_seq(skb),
1298                                 csk->rcv_nxt);
1299                         goto abort_conn;
1300                 }
1301
1302                 bhs = skb->data;
1303                 hlen = ntohs(cpl->len);
1304                 dlen = ntohl(*(unsigned int *)(bhs + 4)) & 0xFFFFFF;
1305
1306                 plen = ISCSI_PDU_LEN_G(pdu_len_ddp);
1307                 if (is_t4(lldi->adapter_type))
1308                         plen -= 40;
1309
1310                 if ((hlen + dlen) != plen) {
1311                         pr_info("tid 0x%x, CPL_ISCSI_HDR, pdu len "
1312                                 "mismatch %u != %u + %u, seq 0x%x.\n",
1313                                 csk->tid, plen, hlen, dlen,
1314                                 cxgbi_skcb_tcp_seq(skb));
1315                         goto abort_conn;
1316                 }
1317
1318                 cxgbi_skcb_rx_pdulen(skb) = (hlen + dlen + 3) & (~0x3);
1319                 if (dlen)
1320                         cxgbi_skcb_rx_pdulen(skb) += csk->dcrc_len;
1321                 csk->rcv_nxt += cxgbi_skcb_rx_pdulen(skb);
1322
1323                 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
1324                         "csk 0x%p, skb 0x%p, 0x%x,%u+%u,0x%x,0x%x.\n",
1325                         csk, skb, *bhs, hlen, dlen,
1326                         ntohl(*((unsigned int *)(bhs + 16))),
1327                         ntohl(*((unsigned int *)(bhs + 24))));
1328
1329         } else {
1330                 struct sk_buff *lskb = csk->skb_ulp_lhdr;
1331
1332                 cxgbi_skcb_set_flag(lskb, SKCBF_RX_DATA);
1333                 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
1334                         "csk 0x%p,%u,0x%lx, skb 0x%p data, 0x%p.\n",
1335                         csk, csk->state, csk->flags, skb, lskb);
1336         }
1337
1338         __skb_queue_tail(&csk->receive_queue, skb);
1339         spin_unlock_bh(&csk->lock);
1340         return;
1341
1342 abort_conn:
1343         send_abort_req(csk);
1344 discard:
1345         spin_unlock_bh(&csk->lock);
1346 rel_skb:
1347         __kfree_skb(skb);
1348 }
1349
1350 static void do_rx_iscsi_data(struct cxgbi_device *cdev, struct sk_buff *skb)
1351 {
1352         struct cxgbi_sock *csk;
1353         struct cpl_iscsi_hdr *cpl = (struct cpl_iscsi_hdr *)skb->data;
1354         struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1355         struct tid_info *t = lldi->tids;
1356         struct sk_buff *lskb;
1357         u32 tid = GET_TID(cpl);
1358         u16 pdu_len_ddp = be16_to_cpu(cpl->pdu_len_ddp);
1359
1360         csk = lookup_tid(t, tid);
1361         if (unlikely(!csk)) {
1362                 pr_err("can't find conn. for tid %u.\n", tid);
1363                 goto rel_skb;
1364         }
1365
1366         log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
1367                   "csk 0x%p,%u,0x%lx, tid %u, skb 0x%p,%u, 0x%x.\n",
1368                   csk, csk->state, csk->flags, csk->tid, skb,
1369                   skb->len, pdu_len_ddp);
1370
1371         spin_lock_bh(&csk->lock);
1372
1373         if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) {
1374                 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1375                           "csk 0x%p,%u,0x%lx,%u, bad state.\n",
1376                           csk, csk->state, csk->flags, csk->tid);
1377
1378                 if (csk->state != CTP_ABORTING)
1379                         goto abort_conn;
1380                 else
1381                         goto discard;
1382         }
1383
1384         cxgbi_skcb_tcp_seq(skb) = be32_to_cpu(cpl->seq);
1385         cxgbi_skcb_flags(skb) = 0;
1386
1387         skb_reset_transport_header(skb);
1388         __skb_pull(skb, sizeof(*cpl));
1389         __pskb_trim(skb, ntohs(cpl->len));
1390
1391         if (!csk->skb_ulp_lhdr)
1392                 csk->skb_ulp_lhdr = skb;
1393
1394         lskb = csk->skb_ulp_lhdr;
1395         cxgbi_skcb_set_flag(lskb, SKCBF_RX_DATA);
1396
1397         log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
1398                   "csk 0x%p,%u,0x%lx, skb 0x%p data, 0x%p.\n",
1399                   csk, csk->state, csk->flags, skb, lskb);
1400
1401         __skb_queue_tail(&csk->receive_queue, skb);
1402         spin_unlock_bh(&csk->lock);
1403         return;
1404
1405 abort_conn:
1406         send_abort_req(csk);
1407 discard:
1408         spin_unlock_bh(&csk->lock);
1409 rel_skb:
1410         __kfree_skb(skb);
1411 }
1412
1413 static void
1414 cxgb4i_process_ddpvld(struct cxgbi_sock *csk,
1415                       struct sk_buff *skb, u32 ddpvld)
1416 {
1417         if (ddpvld & (1 << CPL_RX_DDP_STATUS_HCRC_SHIFT)) {
1418                 pr_info("csk 0x%p, lhdr 0x%p, status 0x%x, hcrc bad 0x%lx.\n",
1419                         csk, skb, ddpvld, cxgbi_skcb_flags(skb));
1420                 cxgbi_skcb_set_flag(skb, SKCBF_RX_HCRC_ERR);
1421         }
1422
1423         if (ddpvld & (1 << CPL_RX_DDP_STATUS_DCRC_SHIFT)) {
1424                 pr_info("csk 0x%p, lhdr 0x%p, status 0x%x, dcrc bad 0x%lx.\n",
1425                         csk, skb, ddpvld, cxgbi_skcb_flags(skb));
1426                 cxgbi_skcb_set_flag(skb, SKCBF_RX_DCRC_ERR);
1427         }
1428
1429         if (ddpvld & (1 << CPL_RX_DDP_STATUS_PAD_SHIFT)) {
1430                 log_debug(1 << CXGBI_DBG_PDU_RX,
1431                           "csk 0x%p, lhdr 0x%p, status 0x%x, pad bad.\n",
1432                           csk, skb, ddpvld);
1433                 cxgbi_skcb_set_flag(skb, SKCBF_RX_PAD_ERR);
1434         }
1435
1436         if ((ddpvld & (1 << CPL_RX_DDP_STATUS_DDP_SHIFT)) &&
1437             !cxgbi_skcb_test_flag(skb, SKCBF_RX_DATA)) {
1438                 log_debug(1 << CXGBI_DBG_PDU_RX,
1439                           "csk 0x%p, lhdr 0x%p, 0x%x, data ddp'ed.\n",
1440                           csk, skb, ddpvld);
1441                 cxgbi_skcb_set_flag(skb, SKCBF_RX_DATA_DDPD);
1442         }
1443 }
1444
1445 static void do_rx_data_ddp(struct cxgbi_device *cdev,
1446                                   struct sk_buff *skb)
1447 {
1448         struct cxgbi_sock *csk;
1449         struct sk_buff *lskb;
1450         struct cpl_rx_data_ddp *rpl = (struct cpl_rx_data_ddp *)skb->data;
1451         unsigned int tid = GET_TID(rpl);
1452         struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1453         struct tid_info *t = lldi->tids;
1454         u32 ddpvld = be32_to_cpu(rpl->ddpvld);
1455
1456         csk = lookup_tid(t, tid);
1457         if (unlikely(!csk)) {
1458                 pr_err("can't find connection for tid %u.\n", tid);
1459                 goto rel_skb;
1460         }
1461
1462         log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
1463                 "csk 0x%p,%u,0x%lx, skb 0x%p,0x%x, lhdr 0x%p.\n",
1464                 csk, csk->state, csk->flags, skb, ddpvld, csk->skb_ulp_lhdr);
1465
1466         spin_lock_bh(&csk->lock);
1467
1468         if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) {
1469                 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1470                         "csk 0x%p,%u,0x%lx,%u, bad state.\n",
1471                         csk, csk->state, csk->flags, csk->tid);
1472                 if (csk->state != CTP_ABORTING)
1473                         goto abort_conn;
1474                 else
1475                         goto discard;
1476         }
1477
1478         if (!csk->skb_ulp_lhdr) {
1479                 pr_err("tid 0x%x, rcv RX_DATA_DDP w/o pdu bhs.\n", csk->tid);
1480                 goto abort_conn;
1481         }
1482
1483         lskb = csk->skb_ulp_lhdr;
1484         csk->skb_ulp_lhdr = NULL;
1485
1486         cxgbi_skcb_rx_ddigest(lskb) = ntohl(rpl->ulp_crc);
1487
1488         if (ntohs(rpl->len) != cxgbi_skcb_rx_pdulen(lskb))
1489                 pr_info("tid 0x%x, RX_DATA_DDP pdulen %u != %u.\n",
1490                         csk->tid, ntohs(rpl->len), cxgbi_skcb_rx_pdulen(lskb));
1491
1492         cxgb4i_process_ddpvld(csk, lskb, ddpvld);
1493
1494         log_debug(1 << CXGBI_DBG_PDU_RX,
1495                 "csk 0x%p, lskb 0x%p, f 0x%lx.\n",
1496                 csk, lskb, cxgbi_skcb_flags(lskb));
1497
1498         cxgbi_skcb_set_flag(lskb, SKCBF_RX_STATUS);
1499         cxgbi_conn_pdu_ready(csk);
1500         spin_unlock_bh(&csk->lock);
1501         goto rel_skb;
1502
1503 abort_conn:
1504         send_abort_req(csk);
1505 discard:
1506         spin_unlock_bh(&csk->lock);
1507 rel_skb:
1508         __kfree_skb(skb);
1509 }
1510
1511 static void
1512 do_rx_iscsi_cmp(struct cxgbi_device *cdev, struct sk_buff *skb)
1513 {
1514         struct cxgbi_sock *csk;
1515         struct cpl_rx_iscsi_cmp *rpl = (struct cpl_rx_iscsi_cmp *)skb->data;
1516         struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1517         struct tid_info *t = lldi->tids;
1518         struct sk_buff *data_skb = NULL;
1519         u32 tid = GET_TID(rpl);
1520         u32 ddpvld = be32_to_cpu(rpl->ddpvld);
1521         u32 seq = be32_to_cpu(rpl->seq);
1522         u16 pdu_len_ddp = be16_to_cpu(rpl->pdu_len_ddp);
1523
1524         csk = lookup_tid(t, tid);
1525         if (unlikely(!csk)) {
1526                 pr_err("can't find connection for tid %u.\n", tid);
1527                 goto rel_skb;
1528         }
1529
1530         log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
1531                   "csk 0x%p,%u,0x%lx, skb 0x%p,0x%x, lhdr 0x%p, len %u, "
1532                   "pdu_len_ddp %u, status %u.\n",
1533                   csk, csk->state, csk->flags, skb, ddpvld, csk->skb_ulp_lhdr,
1534                   ntohs(rpl->len), pdu_len_ddp,  rpl->status);
1535
1536         spin_lock_bh(&csk->lock);
1537
1538         if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) {
1539                 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1540                           "csk 0x%p,%u,0x%lx,%u, bad state.\n",
1541                           csk, csk->state, csk->flags, csk->tid);
1542
1543                 if (csk->state != CTP_ABORTING)
1544                         goto abort_conn;
1545                 else
1546                         goto discard;
1547         }
1548
1549         cxgbi_skcb_tcp_seq(skb) = seq;
1550         cxgbi_skcb_flags(skb) = 0;
1551         cxgbi_skcb_rx_pdulen(skb) = 0;
1552
1553         skb_reset_transport_header(skb);
1554         __skb_pull(skb, sizeof(*rpl));
1555         __pskb_trim(skb, be16_to_cpu(rpl->len));
1556
1557         csk->rcv_nxt = seq + pdu_len_ddp;
1558
1559         if (csk->skb_ulp_lhdr) {
1560                 data_skb = skb_peek(&csk->receive_queue);
1561                 if (!data_skb ||
1562                     !cxgbi_skcb_test_flag(data_skb, SKCBF_RX_DATA)) {
1563                         pr_err("Error! freelist data not found 0x%p, tid %u\n",
1564                                data_skb, tid);
1565
1566                         goto abort_conn;
1567                 }
1568                 __skb_unlink(data_skb, &csk->receive_queue);
1569
1570                 cxgbi_skcb_set_flag(skb, SKCBF_RX_DATA);
1571
1572                 __skb_queue_tail(&csk->receive_queue, skb);
1573                 __skb_queue_tail(&csk->receive_queue, data_skb);
1574         } else {
1575                  __skb_queue_tail(&csk->receive_queue, skb);
1576         }
1577
1578         csk->skb_ulp_lhdr = NULL;
1579
1580         cxgbi_skcb_set_flag(skb, SKCBF_RX_HDR);
1581         cxgbi_skcb_set_flag(skb, SKCBF_RX_STATUS);
1582         cxgbi_skcb_set_flag(skb, SKCBF_RX_ISCSI_COMPL);
1583         cxgbi_skcb_rx_ddigest(skb) = be32_to_cpu(rpl->ulp_crc);
1584
1585         cxgb4i_process_ddpvld(csk, skb, ddpvld);
1586
1587         log_debug(1 << CXGBI_DBG_PDU_RX, "csk 0x%p, skb 0x%p, f 0x%lx.\n",
1588                   csk, skb, cxgbi_skcb_flags(skb));
1589
1590         cxgbi_conn_pdu_ready(csk);
1591         spin_unlock_bh(&csk->lock);
1592
1593         return;
1594
1595 abort_conn:
1596         send_abort_req(csk);
1597 discard:
1598         spin_unlock_bh(&csk->lock);
1599 rel_skb:
1600         __kfree_skb(skb);
1601 }
1602
1603 static void do_fw4_ack(struct cxgbi_device *cdev, struct sk_buff *skb)
1604 {
1605         struct cxgbi_sock *csk;
1606         struct cpl_fw4_ack *rpl = (struct cpl_fw4_ack *)skb->data;
1607         unsigned int tid = GET_TID(rpl);
1608         struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1609         struct tid_info *t = lldi->tids;
1610
1611         csk = lookup_tid(t, tid);
1612         if (unlikely(!csk))
1613                 pr_err("can't find connection for tid %u.\n", tid);
1614         else {
1615                 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1616                         "csk 0x%p,%u,0x%lx,%u.\n",
1617                         csk, csk->state, csk->flags, csk->tid);
1618                 cxgbi_sock_rcv_wr_ack(csk, rpl->credits, ntohl(rpl->snd_una),
1619                                         rpl->seq_vld);
1620         }
1621         __kfree_skb(skb);
1622 }
1623
1624 static void do_set_tcb_rpl(struct cxgbi_device *cdev, struct sk_buff *skb)
1625 {
1626         struct cpl_set_tcb_rpl *rpl = (struct cpl_set_tcb_rpl *)skb->data;
1627         unsigned int tid = GET_TID(rpl);
1628         struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1629         struct tid_info *t = lldi->tids;
1630         struct cxgbi_sock *csk;
1631
1632         csk = lookup_tid(t, tid);
1633         if (!csk) {
1634                 pr_err("can't find conn. for tid %u.\n", tid);
1635                 return;
1636         }
1637
1638         log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1639                 "csk 0x%p,%u,%lx,%u, status 0x%x.\n",
1640                 csk, csk->state, csk->flags, csk->tid, rpl->status);
1641
1642         if (rpl->status != CPL_ERR_NONE) {
1643                 pr_err("csk 0x%p,%u, SET_TCB_RPL status %u.\n",
1644                         csk, tid, rpl->status);
1645                 csk->err = -EINVAL;
1646         }
1647
1648         complete(&csk->cmpl);
1649
1650         __kfree_skb(skb);
1651 }
1652
1653 static int alloc_cpls(struct cxgbi_sock *csk)
1654 {
1655         csk->cpl_close = alloc_wr(sizeof(struct cpl_close_con_req),
1656                                         0, GFP_KERNEL);
1657         if (!csk->cpl_close)
1658                 return -ENOMEM;
1659
1660         csk->cpl_abort_req = alloc_wr(sizeof(struct cpl_abort_req),
1661                                         0, GFP_KERNEL);
1662         if (!csk->cpl_abort_req)
1663                 goto free_cpls;
1664
1665         csk->cpl_abort_rpl = alloc_wr(sizeof(struct cpl_abort_rpl),
1666                                         0, GFP_KERNEL);
1667         if (!csk->cpl_abort_rpl)
1668                 goto free_cpls;
1669         return 0;
1670
1671 free_cpls:
1672         cxgbi_sock_free_cpl_skbs(csk);
1673         return -ENOMEM;
1674 }
1675
1676 static inline void l2t_put(struct cxgbi_sock *csk)
1677 {
1678         if (csk->l2t) {
1679                 cxgb4_l2t_release(csk->l2t);
1680                 csk->l2t = NULL;
1681                 cxgbi_sock_put(csk);
1682         }
1683 }
1684
1685 static void release_offload_resources(struct cxgbi_sock *csk)
1686 {
1687         struct cxgb4_lld_info *lldi;
1688 #if IS_ENABLED(CONFIG_IPV6)
1689         struct net_device *ndev = csk->cdev->ports[csk->port_id];
1690 #endif
1691
1692         log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1693                 "csk 0x%p,%u,0x%lx,%u.\n",
1694                 csk, csk->state, csk->flags, csk->tid);
1695
1696         cxgbi_sock_free_cpl_skbs(csk);
1697         cxgbi_sock_purge_write_queue(csk);
1698         if (csk->wr_cred != csk->wr_max_cred) {
1699                 cxgbi_sock_purge_wr_queue(csk);
1700                 cxgbi_sock_reset_wr_list(csk);
1701         }
1702
1703         l2t_put(csk);
1704 #if IS_ENABLED(CONFIG_IPV6)
1705         if (csk->csk_family == AF_INET6)
1706                 cxgb4_clip_release(ndev,
1707                                    (const u32 *)&csk->saddr6.sin6_addr, 1);
1708 #endif
1709
1710         if (cxgbi_sock_flag(csk, CTPF_HAS_ATID))
1711                 free_atid(csk);
1712         else if (cxgbi_sock_flag(csk, CTPF_HAS_TID)) {
1713                 lldi = cxgbi_cdev_priv(csk->cdev);
1714                 cxgb4_remove_tid(lldi->tids, 0, csk->tid,
1715                                  csk->csk_family);
1716                 cxgbi_sock_clear_flag(csk, CTPF_HAS_TID);
1717                 cxgbi_sock_put(csk);
1718         }
1719         csk->dst = NULL;
1720 }
1721
1722 #ifdef CONFIG_CHELSIO_T4_DCB
1723 static inline u8 get_iscsi_dcb_state(struct net_device *ndev)
1724 {
1725         return ndev->dcbnl_ops->getstate(ndev);
1726 }
1727
1728 static int select_priority(int pri_mask)
1729 {
1730         if (!pri_mask)
1731                 return 0;
1732         return (ffs(pri_mask) - 1);
1733 }
1734
1735 static u8 get_iscsi_dcb_priority(struct net_device *ndev)
1736 {
1737         int rv;
1738         u8 caps;
1739
1740         struct dcb_app iscsi_dcb_app = {
1741                 .protocol = 3260
1742         };
1743
1744         rv = (int)ndev->dcbnl_ops->getcap(ndev, DCB_CAP_ATTR_DCBX, &caps);
1745         if (rv)
1746                 return 0;
1747
1748         if (caps & DCB_CAP_DCBX_VER_IEEE) {
1749                 iscsi_dcb_app.selector = IEEE_8021QAZ_APP_SEL_STREAM;
1750                 rv = dcb_ieee_getapp_mask(ndev, &iscsi_dcb_app);
1751                 if (!rv) {
1752                         iscsi_dcb_app.selector = IEEE_8021QAZ_APP_SEL_ANY;
1753                         rv = dcb_ieee_getapp_mask(ndev, &iscsi_dcb_app);
1754                 }
1755         } else if (caps & DCB_CAP_DCBX_VER_CEE) {
1756                 iscsi_dcb_app.selector = DCB_APP_IDTYPE_PORTNUM;
1757                 rv = dcb_getapp(ndev, &iscsi_dcb_app);
1758         }
1759
1760         log_debug(1 << CXGBI_DBG_ISCSI,
1761                   "iSCSI priority is set to %u\n", select_priority(rv));
1762         return select_priority(rv);
1763 }
1764 #endif
1765
1766 static int init_act_open(struct cxgbi_sock *csk)
1767 {
1768         struct cxgbi_device *cdev = csk->cdev;
1769         struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1770         struct net_device *ndev = cdev->ports[csk->port_id];
1771         struct sk_buff *skb = NULL;
1772         struct neighbour *n = NULL;
1773         void *daddr;
1774         unsigned int step;
1775         unsigned int rxq_idx;
1776         unsigned int size, size6;
1777         unsigned int linkspeed;
1778         unsigned int rcv_winf, snd_winf;
1779 #ifdef CONFIG_CHELSIO_T4_DCB
1780         u8 priority = 0;
1781 #endif
1782         log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1783                 "csk 0x%p,%u,0x%lx,%u.\n",
1784                 csk, csk->state, csk->flags, csk->tid);
1785
1786         if (csk->csk_family == AF_INET)
1787                 daddr = &csk->daddr.sin_addr.s_addr;
1788 #if IS_ENABLED(CONFIG_IPV6)
1789         else if (csk->csk_family == AF_INET6)
1790                 daddr = &csk->daddr6.sin6_addr;
1791 #endif
1792         else {
1793                 pr_err("address family 0x%x not supported\n", csk->csk_family);
1794                 goto rel_resource;
1795         }
1796
1797         n = dst_neigh_lookup(csk->dst, daddr);
1798
1799         if (!n) {
1800                 pr_err("%s, can't get neighbour of csk->dst.\n", ndev->name);
1801                 goto rel_resource;
1802         }
1803
1804         if (!(n->nud_state & NUD_VALID))
1805                 neigh_event_send(n, NULL);
1806
1807         csk->atid = cxgb4_alloc_atid(lldi->tids, csk);
1808         if (csk->atid < 0) {
1809                 pr_err("%s, NO atid available.\n", ndev->name);
1810                 goto rel_resource_without_clip;
1811         }
1812         cxgbi_sock_set_flag(csk, CTPF_HAS_ATID);
1813         cxgbi_sock_get(csk);
1814
1815 #ifdef CONFIG_CHELSIO_T4_DCB
1816         if (get_iscsi_dcb_state(ndev))
1817                 priority = get_iscsi_dcb_priority(ndev);
1818
1819         csk->dcb_priority = priority;
1820         csk->l2t = cxgb4_l2t_get(lldi->l2t, n, ndev, priority);
1821 #else
1822         csk->l2t = cxgb4_l2t_get(lldi->l2t, n, ndev, 0);
1823 #endif
1824         if (!csk->l2t) {
1825                 pr_err("%s, cannot alloc l2t.\n", ndev->name);
1826                 goto rel_resource_without_clip;
1827         }
1828         cxgbi_sock_get(csk);
1829
1830 #if IS_ENABLED(CONFIG_IPV6)
1831         if (csk->csk_family == AF_INET6)
1832                 cxgb4_clip_get(ndev, (const u32 *)&csk->saddr6.sin6_addr, 1);
1833 #endif
1834
1835         if (is_t4(lldi->adapter_type)) {
1836                 size = sizeof(struct cpl_act_open_req);
1837                 size6 = sizeof(struct cpl_act_open_req6);
1838         } else if (is_t5(lldi->adapter_type)) {
1839                 size = sizeof(struct cpl_t5_act_open_req);
1840                 size6 = sizeof(struct cpl_t5_act_open_req6);
1841         } else {
1842                 size = sizeof(struct cpl_t6_act_open_req);
1843                 size6 = sizeof(struct cpl_t6_act_open_req6);
1844         }
1845
1846         if (csk->csk_family == AF_INET)
1847                 skb = alloc_wr(size, 0, GFP_NOIO);
1848 #if IS_ENABLED(CONFIG_IPV6)
1849         else
1850                 skb = alloc_wr(size6, 0, GFP_NOIO);
1851 #endif
1852
1853         if (!skb)
1854                 goto rel_resource;
1855         skb->sk = (struct sock *)csk;
1856         t4_set_arp_err_handler(skb, csk, cxgbi_sock_act_open_req_arp_failure);
1857
1858         if (!csk->mtu)
1859                 csk->mtu = dst_mtu(csk->dst);
1860         cxgb4_best_mtu(lldi->mtus, csk->mtu, &csk->mss_idx);
1861         csk->tx_chan = cxgb4_port_chan(ndev);
1862         csk->smac_idx = ((struct port_info *)netdev_priv(ndev))->smt_idx;
1863         step = lldi->ntxq / lldi->nchan;
1864         csk->txq_idx = cxgb4_port_idx(ndev) * step;
1865         step = lldi->nrxq / lldi->nchan;
1866         rxq_idx = (cxgb4_port_idx(ndev) * step) + (cdev->rxq_idx_cntr % step);
1867         cdev->rxq_idx_cntr++;
1868         csk->rss_qid = lldi->rxq_ids[rxq_idx];
1869         linkspeed = ((struct port_info *)netdev_priv(ndev))->link_cfg.speed;
1870         csk->snd_win = cxgb4i_snd_win;
1871         csk->rcv_win = cxgb4i_rcv_win;
1872         if (cxgb4i_rcv_win <= 0) {
1873                 csk->rcv_win = CXGB4I_DEFAULT_10G_RCV_WIN;
1874                 rcv_winf = linkspeed / SPEED_10000;
1875                 if (rcv_winf)
1876                         csk->rcv_win *= rcv_winf;
1877         }
1878         if (cxgb4i_snd_win <= 0) {
1879                 csk->snd_win = CXGB4I_DEFAULT_10G_SND_WIN;
1880                 snd_winf = linkspeed / SPEED_10000;
1881                 if (snd_winf)
1882                         csk->snd_win *= snd_winf;
1883         }
1884         csk->wr_cred = lldi->wr_cred -
1885                        DIV_ROUND_UP(sizeof(struct cpl_abort_req), 16);
1886         csk->wr_max_cred = csk->wr_cred;
1887         csk->wr_una_cred = 0;
1888         cxgbi_sock_reset_wr_list(csk);
1889         csk->err = 0;
1890
1891         pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u,%u,%u, mtu %u,%u, smac %u.\n",
1892                        (&csk->saddr), (&csk->daddr), csk, csk->state,
1893                        csk->flags, csk->tx_chan, csk->txq_idx, csk->rss_qid,
1894                        csk->mtu, csk->mss_idx, csk->smac_idx);
1895
1896         /* must wait for either a act_open_rpl or act_open_establish */
1897         if (!try_module_get(cdev->owner)) {
1898                 pr_err("%s, try_module_get failed.\n", ndev->name);
1899                 goto rel_resource;
1900         }
1901
1902         cxgbi_sock_set_state(csk, CTP_ACTIVE_OPEN);
1903         if (csk->csk_family == AF_INET)
1904                 send_act_open_req(csk, skb, csk->l2t);
1905 #if IS_ENABLED(CONFIG_IPV6)
1906         else
1907                 send_act_open_req6(csk, skb, csk->l2t);
1908 #endif
1909         neigh_release(n);
1910
1911         return 0;
1912
1913 rel_resource:
1914 #if IS_ENABLED(CONFIG_IPV6)
1915         if (csk->csk_family == AF_INET6)
1916                 cxgb4_clip_release(ndev,
1917                                    (const u32 *)&csk->saddr6.sin6_addr, 1);
1918 #endif
1919 rel_resource_without_clip:
1920         if (n)
1921                 neigh_release(n);
1922         if (skb)
1923                 __kfree_skb(skb);
1924         return -EINVAL;
1925 }
1926
1927 static cxgb4i_cplhandler_func cxgb4i_cplhandlers[NUM_CPL_CMDS] = {
1928         [CPL_ACT_ESTABLISH] = do_act_establish,
1929         [CPL_ACT_OPEN_RPL] = do_act_open_rpl,
1930         [CPL_PEER_CLOSE] = do_peer_close,
1931         [CPL_ABORT_REQ_RSS] = do_abort_req_rss,
1932         [CPL_ABORT_RPL_RSS] = do_abort_rpl_rss,
1933         [CPL_CLOSE_CON_RPL] = do_close_con_rpl,
1934         [CPL_FW4_ACK] = do_fw4_ack,
1935         [CPL_ISCSI_HDR] = do_rx_iscsi_hdr,
1936         [CPL_ISCSI_DATA] = do_rx_iscsi_data,
1937         [CPL_SET_TCB_RPL] = do_set_tcb_rpl,
1938         [CPL_RX_DATA_DDP] = do_rx_data_ddp,
1939         [CPL_RX_ISCSI_DDP] = do_rx_data_ddp,
1940         [CPL_RX_ISCSI_CMP] = do_rx_iscsi_cmp,
1941         [CPL_RX_DATA] = do_rx_data,
1942 };
1943
1944 static int cxgb4i_ofld_init(struct cxgbi_device *cdev)
1945 {
1946         int rc;
1947
1948         if (cxgb4i_max_connect > CXGB4I_MAX_CONN)
1949                 cxgb4i_max_connect = CXGB4I_MAX_CONN;
1950
1951         rc = cxgbi_device_portmap_create(cdev, cxgb4i_sport_base,
1952                                         cxgb4i_max_connect);
1953         if (rc < 0)
1954                 return rc;
1955
1956         cdev->csk_release_offload_resources = release_offload_resources;
1957         cdev->csk_push_tx_frames = push_tx_frames;
1958         cdev->csk_send_abort_req = send_abort_req;
1959         cdev->csk_send_close_req = send_close_req;
1960         cdev->csk_send_rx_credits = send_rx_credits;
1961         cdev->csk_alloc_cpls = alloc_cpls;
1962         cdev->csk_init_act_open = init_act_open;
1963
1964         pr_info("cdev 0x%p, offload up, added.\n", cdev);
1965         return 0;
1966 }
1967
1968 static inline void
1969 ulp_mem_io_set_hdr(struct cxgbi_device *cdev,
1970                    struct ulp_mem_io *req,
1971                    unsigned int wr_len, unsigned int dlen,
1972                    unsigned int pm_addr,
1973                    int tid)
1974 {
1975         struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1976         struct ulptx_idata *idata = (struct ulptx_idata *)(req + 1);
1977
1978         INIT_ULPTX_WR(req, wr_len, 0, tid);
1979         req->wr.wr_hi = htonl(FW_WR_OP_V(FW_ULPTX_WR) |
1980                 FW_WR_ATOMIC_V(0));
1981         req->cmd = htonl(ULPTX_CMD_V(ULP_TX_MEM_WRITE) |
1982                 ULP_MEMIO_ORDER_V(is_t4(lldi->adapter_type)) |
1983                 T5_ULP_MEMIO_IMM_V(!is_t4(lldi->adapter_type)));
1984         req->dlen = htonl(ULP_MEMIO_DATA_LEN_V(dlen >> 5));
1985         req->lock_addr = htonl(ULP_MEMIO_ADDR_V(pm_addr >> 5));
1986         req->len16 = htonl(DIV_ROUND_UP(wr_len - sizeof(req->wr), 16));
1987
1988         idata->cmd_more = htonl(ULPTX_CMD_V(ULP_TX_SC_IMM));
1989         idata->len = htonl(dlen);
1990 }
1991
1992 static struct sk_buff *
1993 ddp_ppod_init_idata(struct cxgbi_device *cdev,
1994                     struct cxgbi_ppm *ppm,
1995                     unsigned int idx, unsigned int npods,
1996                     unsigned int tid)
1997 {
1998         unsigned int pm_addr = (idx << PPOD_SIZE_SHIFT) + ppm->llimit;
1999         unsigned int dlen = npods << PPOD_SIZE_SHIFT;
2000         unsigned int wr_len = roundup(sizeof(struct ulp_mem_io) +
2001                                 sizeof(struct ulptx_idata) + dlen, 16);
2002         struct sk_buff *skb = alloc_wr(wr_len, 0, GFP_ATOMIC);
2003
2004         if (!skb) {
2005                 pr_err("%s: %s idx %u, npods %u, OOM.\n",
2006                        __func__, ppm->ndev->name, idx, npods);
2007                 return NULL;
2008         }
2009
2010         ulp_mem_io_set_hdr(cdev, (struct ulp_mem_io *)skb->head, wr_len, dlen,
2011                            pm_addr, tid);
2012
2013         return skb;
2014 }
2015
2016 static int ddp_ppod_write_idata(struct cxgbi_ppm *ppm, struct cxgbi_sock *csk,
2017                                 struct cxgbi_task_tag_info *ttinfo,
2018                                 unsigned int idx, unsigned int npods,
2019                                 struct scatterlist **sg_pp,
2020                                 unsigned int *sg_off)
2021 {
2022         struct cxgbi_device *cdev = csk->cdev;
2023         struct sk_buff *skb = ddp_ppod_init_idata(cdev, ppm, idx, npods,
2024                                                   csk->tid);
2025         struct ulp_mem_io *req;
2026         struct ulptx_idata *idata;
2027         struct cxgbi_pagepod *ppod;
2028         int i;
2029
2030         if (!skb)
2031                 return -ENOMEM;
2032
2033         req = (struct ulp_mem_io *)skb->head;
2034         idata = (struct ulptx_idata *)(req + 1);
2035         ppod = (struct cxgbi_pagepod *)(idata + 1);
2036
2037         for (i = 0; i < npods; i++, ppod++)
2038                 cxgbi_ddp_set_one_ppod(ppod, ttinfo, sg_pp, sg_off);
2039
2040         cxgbi_skcb_set_flag(skb, SKCBF_TX_MEM_WRITE);
2041         cxgbi_skcb_set_flag(skb, SKCBF_TX_FLAG_COMPL);
2042         set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id);
2043
2044         spin_lock_bh(&csk->lock);
2045         cxgbi_sock_skb_entail(csk, skb);
2046         spin_unlock_bh(&csk->lock);
2047
2048         return 0;
2049 }
2050
2051 static int ddp_set_map(struct cxgbi_ppm *ppm, struct cxgbi_sock *csk,
2052                        struct cxgbi_task_tag_info *ttinfo)
2053 {
2054         unsigned int pidx = ttinfo->idx;
2055         unsigned int npods = ttinfo->npods;
2056         unsigned int i, cnt;
2057         int err = 0;
2058         struct scatterlist *sg = ttinfo->sgl;
2059         unsigned int offset = 0;
2060
2061         ttinfo->cid = csk->port_id;
2062
2063         for (i = 0; i < npods; i += cnt, pidx += cnt) {
2064                 cnt = npods - i;
2065
2066                 if (cnt > ULPMEM_IDATA_MAX_NPPODS)
2067                         cnt = ULPMEM_IDATA_MAX_NPPODS;
2068                 err = ddp_ppod_write_idata(ppm, csk, ttinfo, pidx, cnt,
2069                                            &sg, &offset);
2070                 if (err < 0)
2071                         break;
2072         }
2073
2074         return err;
2075 }
2076
2077 static int ddp_setup_conn_pgidx(struct cxgbi_sock *csk, unsigned int tid,
2078                                 int pg_idx)
2079 {
2080         struct sk_buff *skb;
2081         struct cpl_set_tcb_field *req;
2082
2083         if (!pg_idx || pg_idx >= DDP_PGIDX_MAX)
2084                 return 0;
2085
2086         skb = alloc_wr(sizeof(*req), 0, GFP_KERNEL);
2087         if (!skb)
2088                 return -ENOMEM;
2089
2090         /*  set up ulp page size */
2091         req = (struct cpl_set_tcb_field *)skb->head;
2092         INIT_TP_WR(req, csk->tid);
2093         OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, csk->tid));
2094         req->reply_ctrl = htons(NO_REPLY_V(0) | QUEUENO_V(csk->rss_qid));
2095         req->word_cookie = htons(0);
2096         req->mask = cpu_to_be64(0x3 << 8);
2097         req->val = cpu_to_be64(pg_idx << 8);
2098         set_wr_txq(skb, CPL_PRIORITY_CONTROL, csk->port_id);
2099
2100         log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
2101                 "csk 0x%p, tid 0x%x, pg_idx %u.\n", csk, csk->tid, pg_idx);
2102
2103         reinit_completion(&csk->cmpl);
2104         cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
2105         wait_for_completion(&csk->cmpl);
2106
2107         return csk->err;
2108 }
2109
2110 static int ddp_setup_conn_digest(struct cxgbi_sock *csk, unsigned int tid,
2111                                  int hcrc, int dcrc)
2112 {
2113         struct sk_buff *skb;
2114         struct cpl_set_tcb_field *req;
2115
2116         if (!hcrc && !dcrc)
2117                 return 0;
2118
2119         skb = alloc_wr(sizeof(*req), 0, GFP_KERNEL);
2120         if (!skb)
2121                 return -ENOMEM;
2122
2123         csk->hcrc_len = (hcrc ? 4 : 0);
2124         csk->dcrc_len = (dcrc ? 4 : 0);
2125         /*  set up ulp submode */
2126         req = (struct cpl_set_tcb_field *)skb->head;
2127         INIT_TP_WR(req, tid);
2128         OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, tid));
2129         req->reply_ctrl = htons(NO_REPLY_V(0) | QUEUENO_V(csk->rss_qid));
2130         req->word_cookie = htons(0);
2131         req->mask = cpu_to_be64(0x3 << 4);
2132         req->val = cpu_to_be64(((hcrc ? ULP_CRC_HEADER : 0) |
2133                                 (dcrc ? ULP_CRC_DATA : 0)) << 4);
2134         set_wr_txq(skb, CPL_PRIORITY_CONTROL, csk->port_id);
2135
2136         log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
2137                 "csk 0x%p, tid 0x%x, crc %d,%d.\n", csk, csk->tid, hcrc, dcrc);
2138
2139         reinit_completion(&csk->cmpl);
2140         cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
2141         wait_for_completion(&csk->cmpl);
2142
2143         return csk->err;
2144 }
2145
2146 static struct cxgbi_ppm *cdev2ppm(struct cxgbi_device *cdev)
2147 {
2148         return (struct cxgbi_ppm *)(*((struct cxgb4_lld_info *)
2149                                        (cxgbi_cdev_priv(cdev)))->iscsi_ppm);
2150 }
2151
2152 static int cxgb4i_ddp_init(struct cxgbi_device *cdev)
2153 {
2154         struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
2155         struct net_device *ndev = cdev->ports[0];
2156         struct cxgbi_tag_format tformat;
2157         int i, err;
2158
2159         if (!lldi->vr->iscsi.size) {
2160                 pr_warn("%s, iscsi NOT enabled, check config!\n", ndev->name);
2161                 return -EACCES;
2162         }
2163
2164         cdev->flags |= CXGBI_FLAG_USE_PPOD_OFLDQ;
2165
2166         memset(&tformat, 0, sizeof(struct cxgbi_tag_format));
2167         for (i = 0; i < 4; i++)
2168                 tformat.pgsz_order[i] = (lldi->iscsi_pgsz_order >> (i << 3))
2169                                          & 0xF;
2170         cxgbi_tagmask_check(lldi->iscsi_tagmask, &tformat);
2171
2172         pr_info("iscsi_edram.start 0x%x iscsi_edram.size 0x%x",
2173                 lldi->vr->ppod_edram.start, lldi->vr->ppod_edram.size);
2174
2175         err = cxgbi_ddp_ppm_setup(lldi->iscsi_ppm, cdev, &tformat,
2176                                   lldi->vr->iscsi.size, lldi->iscsi_llimit,
2177                                   lldi->vr->iscsi.start, 2,
2178                                   lldi->vr->ppod_edram.start,
2179                                   lldi->vr->ppod_edram.size);
2180
2181         if (err < 0)
2182                 return err;
2183
2184         cdev->csk_ddp_setup_digest = ddp_setup_conn_digest;
2185         cdev->csk_ddp_setup_pgidx = ddp_setup_conn_pgidx;
2186         cdev->csk_ddp_set_map = ddp_set_map;
2187         cdev->tx_max_size = min_t(unsigned int, ULP2_MAX_PDU_PAYLOAD,
2188                                   lldi->iscsi_iolen - ISCSI_PDU_NONPAYLOAD_LEN);
2189         cdev->rx_max_size = min_t(unsigned int, ULP2_MAX_PDU_PAYLOAD,
2190                                   lldi->iscsi_iolen - ISCSI_PDU_NONPAYLOAD_LEN);
2191         cdev->cdev2ppm = cdev2ppm;
2192
2193         return 0;
2194 }
2195
2196 static bool is_memfree(struct adapter *adap)
2197 {
2198         u32 io;
2199
2200         io = t4_read_reg(adap, MA_TARGET_MEM_ENABLE_A);
2201         if (is_t5(adap->params.chip)) {
2202                 if ((io & EXT_MEM0_ENABLE_F) || (io & EXT_MEM1_ENABLE_F))
2203                         return false;
2204         } else if (io & EXT_MEM_ENABLE_F) {
2205                 return false;
2206         }
2207
2208         return true;
2209 }
2210
2211 static void *t4_uld_add(const struct cxgb4_lld_info *lldi)
2212 {
2213         struct cxgbi_device *cdev;
2214         struct port_info *pi;
2215         struct net_device *ndev;
2216         struct adapter *adap;
2217         struct tid_info *t;
2218         u32 max_cmds = CXGB4I_SCSI_HOST_QDEPTH;
2219         u32 max_conn = CXGBI_MAX_CONN;
2220         int i, rc;
2221
2222         cdev = cxgbi_device_register(sizeof(*lldi), lldi->nports);
2223         if (!cdev) {
2224                 pr_info("t4 device 0x%p, register failed.\n", lldi);
2225                 return NULL;
2226         }
2227         pr_info("0x%p,0x%x, ports %u,%s, chan %u, q %u,%u, wr %u.\n",
2228                 cdev, lldi->adapter_type, lldi->nports,
2229                 lldi->ports[0]->name, lldi->nchan, lldi->ntxq,
2230                 lldi->nrxq, lldi->wr_cred);
2231         for (i = 0; i < lldi->nrxq; i++)
2232                 log_debug(1 << CXGBI_DBG_DEV,
2233                         "t4 0x%p, rxq id #%d: %u.\n",
2234                         cdev, i, lldi->rxq_ids[i]);
2235
2236         memcpy(cxgbi_cdev_priv(cdev), lldi, sizeof(*lldi));
2237         cdev->flags = CXGBI_FLAG_DEV_T4;
2238         cdev->pdev = lldi->pdev;
2239         cdev->ports = lldi->ports;
2240         cdev->nports = lldi->nports;
2241         cdev->mtus = lldi->mtus;
2242         cdev->nmtus = NMTUS;
2243         cdev->rx_credit_thres = (CHELSIO_CHIP_VERSION(lldi->adapter_type) <=
2244                                  CHELSIO_T5) ? cxgb4i_rx_credit_thres : 0;
2245         cdev->skb_tx_rsvd = CXGB4I_TX_HEADER_LEN;
2246         cdev->skb_rx_extra = sizeof(struct cpl_iscsi_hdr);
2247         cdev->itp = &cxgb4i_iscsi_transport;
2248         cdev->owner = THIS_MODULE;
2249
2250         cdev->pfvf = FW_PFVF_CMD_PFN_V(lldi->pf);
2251         pr_info("cdev 0x%p,%s, pfvf %u.\n",
2252                 cdev, lldi->ports[0]->name, cdev->pfvf);
2253
2254         rc = cxgb4i_ddp_init(cdev);
2255         if (rc) {
2256                 pr_info("t4 0x%p ddp init failed %d.\n", cdev, rc);
2257                 goto err_out;
2258         }
2259
2260         ndev = cdev->ports[0];
2261         adap = netdev2adap(ndev);
2262         if (adap) {
2263                 t = &adap->tids;
2264                 if (t->ntids <= CXGBI_MAX_CONN)
2265                         max_conn = t->ntids;
2266
2267                 if (is_memfree(adap)) {
2268                         cdev->flags |=  CXGBI_FLAG_DEV_ISO_OFF;
2269                         max_cmds = CXGB4I_SCSI_HOST_QDEPTH >> 2;
2270
2271                         pr_info("%s: 0x%p, tid %u, SO adapter.\n",
2272                                 ndev->name, cdev, t->ntids);
2273                 }
2274         } else {
2275                 pr_info("%s, 0x%p, NO adapter struct.\n", ndev->name, cdev);
2276         }
2277
2278         /* ISO is enabled in T5/T6 firmware version >= 1.13.43.0 */
2279         if (!is_t4(lldi->adapter_type) &&
2280             (lldi->fw_vers >= 0x10d2b00) &&
2281             !(cdev->flags & CXGBI_FLAG_DEV_ISO_OFF))
2282                 cdev->skb_iso_txhdr = sizeof(struct cpl_tx_data_iso);
2283
2284         rc = cxgb4i_ofld_init(cdev);
2285         if (rc) {
2286                 pr_info("t4 0x%p ofld init failed.\n", cdev);
2287                 goto err_out;
2288         }
2289
2290         cxgb4i_host_template.can_queue = max_cmds;
2291         rc = cxgbi_hbas_add(cdev, CXGB4I_MAX_LUN, max_conn,
2292                             &cxgb4i_host_template, cxgb4i_stt);
2293         if (rc)
2294                 goto err_out;
2295
2296         for (i = 0; i < cdev->nports; i++) {
2297                 pi = netdev_priv(lldi->ports[i]);
2298                 cdev->hbas[i]->port_id = pi->port_id;
2299         }
2300         return cdev;
2301
2302 err_out:
2303         cxgbi_device_unregister(cdev);
2304         return ERR_PTR(-ENOMEM);
2305 }
2306
2307 #define RX_PULL_LEN     128
2308 static int t4_uld_rx_handler(void *handle, const __be64 *rsp,
2309                                 const struct pkt_gl *pgl)
2310 {
2311         const struct cpl_act_establish *rpl;
2312         struct sk_buff *skb;
2313         unsigned int opc;
2314         struct cxgbi_device *cdev = handle;
2315
2316         if (pgl == NULL) {
2317                 unsigned int len = 64 - sizeof(struct rsp_ctrl) - 8;
2318
2319                 skb = alloc_wr(len, 0, GFP_ATOMIC);
2320                 if (!skb)
2321                         goto nomem;
2322                 skb_copy_to_linear_data(skb, &rsp[1], len);
2323         } else {
2324                 if (unlikely(*(u8 *)rsp != *(u8 *)pgl->va)) {
2325                         pr_info("? FL 0x%p,RSS%#llx,FL %#llx,len %u.\n",
2326                                 pgl->va, be64_to_cpu(*rsp),
2327                                 be64_to_cpu(*(u64 *)pgl->va),
2328                                 pgl->tot_len);
2329                         return 0;
2330                 }
2331                 skb = cxgb4_pktgl_to_skb(pgl, RX_PULL_LEN, RX_PULL_LEN);
2332                 if (unlikely(!skb))
2333                         goto nomem;
2334         }
2335
2336         rpl = (struct cpl_act_establish *)skb->data;
2337         opc = rpl->ot.opcode;
2338         log_debug(1 << CXGBI_DBG_TOE,
2339                 "cdev %p, opcode 0x%x(0x%x,0x%x), skb %p.\n",
2340                  cdev, opc, rpl->ot.opcode_tid, ntohl(rpl->ot.opcode_tid), skb);
2341         if (opc >= ARRAY_SIZE(cxgb4i_cplhandlers) || !cxgb4i_cplhandlers[opc]) {
2342                 pr_err("No handler for opcode 0x%x.\n", opc);
2343                 __kfree_skb(skb);
2344         } else
2345                 cxgb4i_cplhandlers[opc](cdev, skb);
2346
2347         return 0;
2348 nomem:
2349         log_debug(1 << CXGBI_DBG_TOE, "OOM bailing out.\n");
2350         return 1;
2351 }
2352
2353 static int t4_uld_state_change(void *handle, enum cxgb4_state state)
2354 {
2355         struct cxgbi_device *cdev = handle;
2356
2357         switch (state) {
2358         case CXGB4_STATE_UP:
2359                 pr_info("cdev 0x%p, UP.\n", cdev);
2360                 break;
2361         case CXGB4_STATE_START_RECOVERY:
2362                 pr_info("cdev 0x%p, RECOVERY.\n", cdev);
2363                 /* close all connections */
2364                 break;
2365         case CXGB4_STATE_DOWN:
2366                 pr_info("cdev 0x%p, DOWN.\n", cdev);
2367                 break;
2368         case CXGB4_STATE_DETACH:
2369                 pr_info("cdev 0x%p, DETACH.\n", cdev);
2370                 cxgbi_device_unregister(cdev);
2371                 break;
2372         default:
2373                 pr_info("cdev 0x%p, unknown state %d.\n", cdev, state);
2374                 break;
2375         }
2376         return 0;
2377 }
2378
2379 #ifdef CONFIG_CHELSIO_T4_DCB
2380 static int
2381 cxgb4_dcb_change_notify(struct notifier_block *self, unsigned long val,
2382                         void *data)
2383 {
2384         int i, port = 0xFF;
2385         struct net_device *ndev;
2386         struct cxgbi_device *cdev = NULL;
2387         struct dcb_app_type *iscsi_app = data;
2388         struct cxgbi_ports_map *pmap;
2389         u8 priority;
2390
2391         if (iscsi_app->dcbx & DCB_CAP_DCBX_VER_IEEE) {
2392                 if ((iscsi_app->app.selector != IEEE_8021QAZ_APP_SEL_STREAM) &&
2393                     (iscsi_app->app.selector != IEEE_8021QAZ_APP_SEL_ANY))
2394                         return NOTIFY_DONE;
2395
2396                 priority = iscsi_app->app.priority;
2397         } else if (iscsi_app->dcbx & DCB_CAP_DCBX_VER_CEE) {
2398                 if (iscsi_app->app.selector != DCB_APP_IDTYPE_PORTNUM)
2399                         return NOTIFY_DONE;
2400
2401                 if (!iscsi_app->app.priority)
2402                         return NOTIFY_DONE;
2403
2404                 priority = ffs(iscsi_app->app.priority) - 1;
2405         } else {
2406                 return NOTIFY_DONE;
2407         }
2408
2409         if (iscsi_app->app.protocol != 3260)
2410                 return NOTIFY_DONE;
2411
2412         log_debug(1 << CXGBI_DBG_ISCSI, "iSCSI priority for ifid %d is %u\n",
2413                   iscsi_app->ifindex, priority);
2414
2415         ndev = dev_get_by_index(&init_net, iscsi_app->ifindex);
2416         if (!ndev)
2417                 return NOTIFY_DONE;
2418
2419         cdev = cxgbi_device_find_by_netdev_rcu(ndev, &port);
2420
2421         dev_put(ndev);
2422         if (!cdev)
2423                 return NOTIFY_DONE;
2424
2425         pmap = &cdev->pmap;
2426
2427         for (i = 0; i < pmap->used; i++) {
2428                 if (pmap->port_csk[i]) {
2429                         struct cxgbi_sock *csk = pmap->port_csk[i];
2430
2431                         if (csk->dcb_priority != priority) {
2432                                 iscsi_conn_failure(csk->user_data,
2433                                                    ISCSI_ERR_CONN_FAILED);
2434                                 pr_info("Restarting iSCSI connection %p with "
2435                                         "priority %u->%u.\n", csk,
2436                                         csk->dcb_priority, priority);
2437                         }
2438                 }
2439         }
2440         return NOTIFY_OK;
2441 }
2442 #endif
2443
2444 static int __init cxgb4i_init_module(void)
2445 {
2446         int rc;
2447
2448         printk(KERN_INFO "%s", version);
2449
2450         rc = cxgbi_iscsi_init(&cxgb4i_iscsi_transport, &cxgb4i_stt);
2451         if (rc < 0)
2452                 return rc;
2453         cxgb4_register_uld(CXGB4_ULD_ISCSI, &cxgb4i_uld_info);
2454
2455 #ifdef CONFIG_CHELSIO_T4_DCB
2456         pr_info("%s dcb enabled.\n", DRV_MODULE_NAME);
2457         register_dcbevent_notifier(&cxgb4_dcb_change);
2458 #endif
2459         return 0;
2460 }
2461
2462 static void __exit cxgb4i_exit_module(void)
2463 {
2464 #ifdef CONFIG_CHELSIO_T4_DCB
2465         unregister_dcbevent_notifier(&cxgb4_dcb_change);
2466 #endif
2467         cxgb4_unregister_uld(CXGB4_ULD_ISCSI);
2468         cxgbi_device_unregister_all(CXGBI_FLAG_DEV_T4);
2469         cxgbi_iscsi_cleanup(&cxgb4i_iscsi_transport, &cxgb4i_stt);
2470 }
2471
2472 module_init(cxgb4i_init_module);
2473 module_exit(cxgb4i_exit_module);