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 #define DRV_MODULE_NAME         "cxgb4i"
  39 #define DRV_MODULE_DESC         "Chelsio T4-T6 iSCSI Driver"
  40 #define DRV_MODULE_VERSION      "0.9.5-ko"
  41 #define DRV_MODULE_RELDATE      "Apr. 2015"
  42
  43 static char version[] =
  44         DRV_MODULE_DESC " " DRV_MODULE_NAME
  45         " v" DRV_MODULE_VERSION " (" DRV_MODULE_RELDATE ")\n";
  46
  47 MODULE_AUTHOR("Chelsio Communications, Inc.");
  48 MODULE_DESCRIPTION(DRV_MODULE_DESC);
  49 MODULE_VERSION(DRV_MODULE_VERSION);
  50 MODULE_LICENSE("GPL");
  51
  52 module_param(dbg_level, uint, 0644);
  53 MODULE_PARM_DESC(dbg_level, "Debug flag (default=0)");
  54
  55 #define CXGB4I_DEFAULT_10G_RCV_WIN (256 * 1024)
  56 static int cxgb4i_rcv_win = -1;
  57 module_param(cxgb4i_rcv_win, int, 0644);
  58 MODULE_PARM_DESC(cxgb4i_rcv_win, "TCP reveive window in bytes");
  59
  60 #define CXGB4I_DEFAULT_10G_SND_WIN (128 * 1024)
  61 static int cxgb4i_snd_win = -1;
  62 module_param(cxgb4i_snd_win, int, 0644);
  63 MODULE_PARM_DESC(cxgb4i_snd_win, "TCP send window in bytes");
  64
  65 static int cxgb4i_rx_credit_thres = 10 * 1024;
  66 module_param(cxgb4i_rx_credit_thres, int, 0644);
  67 MODULE_PARM_DESC(cxgb4i_rx_credit_thres,
  68                 "RX credits return threshold in bytes (default=10KB)");
  69
  70 static unsigned int cxgb4i_max_connect = (8 * 1024);
  71 module_param(cxgb4i_max_connect, uint, 0644);
  72 MODULE_PARM_DESC(cxgb4i_max_connect, "Maximum number of connections");
  73
  74 static unsigned short cxgb4i_sport_base = 20000;
  75 module_param(cxgb4i_sport_base, ushort, 0644);
  76 MODULE_PARM_DESC(cxgb4i_sport_base, "Starting port number (default 20000)");
  77
  78 typedef void (*cxgb4i_cplhandler_func)(struct cxgbi_device *, struct sk_buff *);
  79
  80 static void *t4_uld_add(const struct cxgb4_lld_info *);
  81 static int t4_uld_rx_handler(void *, const __be64 *, const struct pkt_gl *);
  82 static int t4_uld_state_change(void *, enum cxgb4_state state);
  83 static inline int send_tx_flowc_wr(struct cxgbi_sock *);
  84
  85 static const struct cxgb4_uld_info cxgb4i_uld_info = {
  86         .name = DRV_MODULE_NAME,
  87         .nrxq = MAX_ULD_QSETS,
  88         .ntxq = MAX_ULD_QSETS,
  89         .rxq_size = 1024,
  90         .lro = false,
  91         .add = t4_uld_add,
  92         .rx_handler = t4_uld_rx_handler,
  93         .state_change = t4_uld_state_change,
  94 };
  95
  96 static struct scsi_host_template cxgb4i_host_template = {
  97         .module         = THIS_MODULE,
  98         .name           = DRV_MODULE_NAME,
  99         .proc_name      = DRV_MODULE_NAME,
 100         .can_queue      = CXGB4I_SCSI_HOST_QDEPTH,
 101         .queuecommand   = iscsi_queuecommand,
 102         .change_queue_depth = scsi_change_queue_depth,
 103         .sg_tablesize   = SG_ALL,
 104         .max_sectors    = 0xFFFF,
 105         .cmd_per_lun    = ISCSI_DEF_CMD_PER_LUN,
 106         .eh_timed_out   = iscsi_eh_cmd_timed_out,
 107         .eh_abort_handler = iscsi_eh_abort,
 108         .eh_device_reset_handler = iscsi_eh_device_reset,
 109         .eh_target_reset_handler = iscsi_eh_recover_target,
 110         .target_alloc   = iscsi_target_alloc,
 111         .use_clustering = DISABLE_CLUSTERING,
 112         .this_id        = -1,
 113         .track_queue_depth = 1,
 114 };
 115
 116 static struct iscsi_transport cxgb4i_iscsi_transport = {
 117         .owner          = THIS_MODULE,
 118         .name           = DRV_MODULE_NAME,
 119         .caps           = CAP_RECOVERY_L0 | CAP_MULTI_R2T | CAP_HDRDGST |
 120                                 CAP_DATADGST | CAP_DIGEST_OFFLOAD |
 121                                 CAP_PADDING_OFFLOAD | CAP_TEXT_NEGO,
 122         .attr_is_visible        = cxgbi_attr_is_visible,
 123         .get_host_param = cxgbi_get_host_param,
 124         .set_host_param = cxgbi_set_host_param,
 125         /* session management */
 126         .create_session = cxgbi_create_session,
 127         .destroy_session        = cxgbi_destroy_session,
 128         .get_session_param = iscsi_session_get_param,
 129         /* connection management */
 130         .create_conn    = cxgbi_create_conn,
 131         .bind_conn              = cxgbi_bind_conn,
 132         .destroy_conn   = iscsi_tcp_conn_teardown,
 133         .start_conn             = iscsi_conn_start,
 134         .stop_conn              = iscsi_conn_stop,
 135         .get_conn_param = iscsi_conn_get_param,
 136         .set_param      = cxgbi_set_conn_param,
 137         .get_stats      = cxgbi_get_conn_stats,
 138         /* pdu xmit req from user space */
 139         .send_pdu       = iscsi_conn_send_pdu,
 140         /* task */
 141         .init_task      = iscsi_tcp_task_init,
 142         .xmit_task      = iscsi_tcp_task_xmit,
 143         .cleanup_task   = cxgbi_cleanup_task,
 144         /* pdu */
 145         .alloc_pdu      = cxgbi_conn_alloc_pdu,
 146         .init_pdu       = cxgbi_conn_init_pdu,
 147         .xmit_pdu       = cxgbi_conn_xmit_pdu,
 148         .parse_pdu_itt  = cxgbi_parse_pdu_itt,
 149         /* TCP connect/disconnect */
 150         .get_ep_param   = cxgbi_get_ep_param,
 151         .ep_connect     = cxgbi_ep_connect,
 152         .ep_poll        = cxgbi_ep_poll,
 153         .ep_disconnect  = cxgbi_ep_disconnect,
 154         /* Error recovery timeout call */
 155         .session_recovery_timedout = iscsi_session_recovery_timedout,
 156 };
 157
 158 static struct scsi_transport_template *cxgb4i_stt;
 159
 160 /*
 161  * CPL (Chelsio Protocol Language) defines a message passing interface between
 162  * the host driver and Chelsio asic.
 163  * The section below implments CPLs that related to iscsi tcp connection
 164  * open/close/abort and data send/receive.
 165  */
 166
 167 #define RCV_BUFSIZ_MASK         0x3FFU
 168 #define MAX_IMM_TX_PKT_LEN      256
 169
 170 static int push_tx_frames(struct cxgbi_sock *, int);
 171
 172 /*
 173  * is_ofld_imm - check whether a packet can be sent as immediate data
 174  * @skb: the packet
 175  *
 176  * Returns true if a packet can be sent as an offload WR with immediate
 177  * data.  We currently use the same limit as for Ethernet packets.
 178  */
 179 static inline bool is_ofld_imm(const struct sk_buff *skb)
 180 {
 181         int len = skb->len;
 182
 183         if (likely(cxgbi_skcb_test_flag(skb, SKCBF_TX_NEED_HDR)))
 184                 len += sizeof(struct fw_ofld_tx_data_wr);
 185
 186         return len <= MAX_IMM_TX_PKT_LEN;
 187 }
 188
 189 static void send_act_open_req(struct cxgbi_sock *csk, struct sk_buff *skb,
 190                                 struct l2t_entry *e)
 191 {
 192         struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev);
 193         int wscale = cxgbi_sock_compute_wscale(csk->mss_idx);
 194         unsigned long long opt0;
 195         unsigned int opt2;
 196         unsigned int qid_atid = ((unsigned int)csk->atid) |
 197                                  (((unsigned int)csk->rss_qid) << 14);
 198
 199         opt0 = KEEP_ALIVE_F |
 200                 WND_SCALE_V(wscale) |
 201                 MSS_IDX_V(csk->mss_idx) |
 202                 L2T_IDX_V(((struct l2t_entry *)csk->l2t)->idx) |
 203                 TX_CHAN_V(csk->tx_chan) |
 204                 SMAC_SEL_V(csk->smac_idx) |
 205                 ULP_MODE_V(ULP_MODE_ISCSI) |
 206                 RCV_BUFSIZ_V(csk->rcv_win >> 10);
 207
 208         opt2 = RX_CHANNEL_V(0) |
 209                 RSS_QUEUE_VALID_F |
 210                 RSS_QUEUE_V(csk->rss_qid);
 211
 212         if (is_t4(lldi->adapter_type)) {
 213                 struct cpl_act_open_req *req =
 214                                 (struct cpl_act_open_req *)skb->head;
 215
 216                 INIT_TP_WR(req, 0);
 217                 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ,
 218                                         qid_atid));
 219                 req->local_port = csk->saddr.sin_port;
 220                 req->peer_port = csk->daddr.sin_port;
 221                 req->local_ip = csk->saddr.sin_addr.s_addr;
 222                 req->peer_ip = csk->daddr.sin_addr.s_addr;
 223                 req->opt0 = cpu_to_be64(opt0);
 224                 req->params = cpu_to_be32(cxgb4_select_ntuple(
 225                                         csk->cdev->ports[csk->port_id],
 226                                         csk->l2t));
 227                 opt2 |= RX_FC_VALID_F;
 228                 req->opt2 = cpu_to_be32(opt2);
 229
 230                 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
 231                         "csk t4 0x%p, %pI4:%u-%pI4:%u, atid %d, qid %u.\n",
 232                         csk, &req->local_ip, ntohs(req->local_port),
 233                         &req->peer_ip, ntohs(req->peer_port),
 234                         csk->atid, csk->rss_qid);
 235         } else if (is_t5(lldi->adapter_type)) {
 236                 struct cpl_t5_act_open_req *req =
 237                                 (struct cpl_t5_act_open_req *)skb->head;
 238                 u32 isn = (prandom_u32() & ~7UL) - 1;
 239
 240                 INIT_TP_WR(req, 0);
 241                 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ,
 242                                         qid_atid));
 243                 req->local_port = csk->saddr.sin_port;
 244                 req->peer_port = csk->daddr.sin_port;
 245                 req->local_ip = csk->saddr.sin_addr.s_addr;
 246                 req->peer_ip = csk->daddr.sin_addr.s_addr;
 247                 req->opt0 = cpu_to_be64(opt0);
 248                 req->params = cpu_to_be64(FILTER_TUPLE_V(
 249                                 cxgb4_select_ntuple(
 250                                         csk->cdev->ports[csk->port_id],
 251                                         csk->l2t)));
 252                 req->rsvd = cpu_to_be32(isn);
 253                 opt2 |= T5_ISS_VALID;
 254                 opt2 |= T5_OPT_2_VALID_F;
 255
 256                 req->opt2 = cpu_to_be32(opt2);
 257
 258                 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
 259                         "csk t5 0x%p, %pI4:%u-%pI4:%u, atid %d, qid %u.\n",
 260                         csk, &req->local_ip, ntohs(req->local_port),
 261                         &req->peer_ip, ntohs(req->peer_port),
 262                         csk->atid, csk->rss_qid);
 263         } else {
 264                 struct cpl_t6_act_open_req *req =
 265                                 (struct cpl_t6_act_open_req *)skb->head;
 266                 u32 isn = (prandom_u32() & ~7UL) - 1;
 267
 268                 INIT_TP_WR(req, 0);
 269                 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ,
 270                                                             qid_atid));
 271                 req->local_port = csk->saddr.sin_port;
 272                 req->peer_port = csk->daddr.sin_port;
 273                 req->local_ip = csk->saddr.sin_addr.s_addr;
 274                 req->peer_ip = csk->daddr.sin_addr.s_addr;
 275                 req->opt0 = cpu_to_be64(opt0);
 276                 req->params = cpu_to_be64(FILTER_TUPLE_V(
 277                                 cxgb4_select_ntuple(
 278                                         csk->cdev->ports[csk->port_id],
 279                                         csk->l2t)));
 280                 req->rsvd = cpu_to_be32(isn);
 281
 282                 opt2 |= T5_ISS_VALID;
 283                 opt2 |= RX_FC_DISABLE_F;
 284                 opt2 |= T5_OPT_2_VALID_F;
 285
 286                 req->opt2 = cpu_to_be32(opt2);
 287                 req->rsvd2 = cpu_to_be32(0);
 288                 req->opt3 = cpu_to_be32(0);
 289
 290                 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
 291                           "csk t6 0x%p, %pI4:%u-%pI4:%u, atid %d, qid %u.\n",
 292                           csk, &req->local_ip, ntohs(req->local_port),
 293                           &req->peer_ip, ntohs(req->peer_port),
 294                           csk->atid, csk->rss_qid);
 295         }
 296
 297         set_wr_txq(skb, CPL_PRIORITY_SETUP, csk->port_id);
 298
 299         pr_info_ipaddr("t%d csk 0x%p,%u,0x%lx,%u, rss_qid %u.\n",
 300                        (&csk->saddr), (&csk->daddr),
 301                        CHELSIO_CHIP_VERSION(lldi->adapter_type), csk,
 302                        csk->state, csk->flags, csk->atid, csk->rss_qid);
 303
 304         cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t);
 305 }
 306
 307 #if IS_ENABLED(CONFIG_IPV6)
 308 static void send_act_open_req6(struct cxgbi_sock *csk, struct sk_buff *skb,
 309                                struct l2t_entry *e)
 310 {
 311         struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev);
 312         int wscale = cxgbi_sock_compute_wscale(csk->mss_idx);
 313         unsigned long long opt0;
 314         unsigned int opt2;
 315         unsigned int qid_atid = ((unsigned int)csk->atid) |
 316                                  (((unsigned int)csk->rss_qid) << 14);
 317
 318         opt0 = KEEP_ALIVE_F |
 319                 WND_SCALE_V(wscale) |
 320                 MSS_IDX_V(csk->mss_idx) |
 321                 L2T_IDX_V(((struct l2t_entry *)csk->l2t)->idx) |
 322                 TX_CHAN_V(csk->tx_chan) |
 323                 SMAC_SEL_V(csk->smac_idx) |
 324                 ULP_MODE_V(ULP_MODE_ISCSI) |
 325                 RCV_BUFSIZ_V(csk->rcv_win >> 10);
 326
 327         opt2 = RX_CHANNEL_V(0) |
 328                 RSS_QUEUE_VALID_F |
 329                 RSS_QUEUE_V(csk->rss_qid);
 330
 331         if (is_t4(lldi->adapter_type)) {
 332                 struct cpl_act_open_req6 *req =
 333                             (struct cpl_act_open_req6 *)skb->head;
 334
 335                 INIT_TP_WR(req, 0);
 336                 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ6,
 337                                                             qid_atid));
 338                 req->local_port = csk->saddr6.sin6_port;
 339                 req->peer_port = csk->daddr6.sin6_port;
 340
 341                 req->local_ip_hi = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr);
 342                 req->local_ip_lo = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr +
 343                                                                     8);
 344                 req->peer_ip_hi = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr);
 345                 req->peer_ip_lo = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr +
 346                                                                     8);
 347
 348                 req->opt0 = cpu_to_be64(opt0);
 349
 350                 opt2 |= RX_FC_VALID_F;
 351                 req->opt2 = cpu_to_be32(opt2);
 352
 353                 req->params = cpu_to_be32(cxgb4_select_ntuple(
 354                                           csk->cdev->ports[csk->port_id],
 355                                           csk->l2t));
 356         } else if (is_t5(lldi->adapter_type)) {
 357                 struct cpl_t5_act_open_req6 *req =
 358                                 (struct cpl_t5_act_open_req6 *)skb->head;
 359
 360                 INIT_TP_WR(req, 0);
 361                 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ6,
 362                                                             qid_atid));
 363                 req->local_port = csk->saddr6.sin6_port;
 364                 req->peer_port = csk->daddr6.sin6_port;
 365                 req->local_ip_hi = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr);
 366                 req->local_ip_lo = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr +
 367                                                                         8);
 368                 req->peer_ip_hi = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr);
 369                 req->peer_ip_lo = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr +
 370                                                                         8);
 371                 req->opt0 = cpu_to_be64(opt0);
 372
 373                 opt2 |= T5_OPT_2_VALID_F;
 374                 req->opt2 = cpu_to_be32(opt2);
 375
 376                 req->params = cpu_to_be64(FILTER_TUPLE_V(cxgb4_select_ntuple(
 377                                           csk->cdev->ports[csk->port_id],
 378                                           csk->l2t)));
 379         } else {
 380                 struct cpl_t6_act_open_req6 *req =
 381                                 (struct cpl_t6_act_open_req6 *)skb->head;
 382
 383                 INIT_TP_WR(req, 0);
 384                 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ6,
 385                                                             qid_atid));
 386                 req->local_port = csk->saddr6.sin6_port;
 387                 req->peer_port = csk->daddr6.sin6_port;
 388                 req->local_ip_hi = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr);
 389                 req->local_ip_lo = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr +
 390                                                                         8);
 391                 req->peer_ip_hi = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr);
 392                 req->peer_ip_lo = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr +
 393                                                                         8);
 394                 req->opt0 = cpu_to_be64(opt0);
 395
 396                 opt2 |= RX_FC_DISABLE_F;
 397                 opt2 |= T5_OPT_2_VALID_F;
 398
 399                 req->opt2 = cpu_to_be32(opt2);
 400
 401                 req->params = cpu_to_be64(FILTER_TUPLE_V(cxgb4_select_ntuple(
 402                                           csk->cdev->ports[csk->port_id],
 403                                           csk->l2t)));
 404
 405                 req->rsvd2 = cpu_to_be32(0);
 406                 req->opt3 = cpu_to_be32(0);
 407         }
 408
 409         set_wr_txq(skb, CPL_PRIORITY_SETUP, csk->port_id);
 410
 411         pr_info("t%d csk 0x%p,%u,0x%lx,%u, [%pI6]:%u-[%pI6]:%u, rss_qid %u.\n",
 412                 CHELSIO_CHIP_VERSION(lldi->adapter_type), csk, csk->state,
 413                 csk->flags, csk->atid,
 414                 &csk->saddr6.sin6_addr, ntohs(csk->saddr.sin_port),
 415                 &csk->daddr6.sin6_addr, ntohs(csk->daddr.sin_port),
 416                 csk->rss_qid);
 417
 418         cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t);
 419 }
 420 #endif
 421
 422 static void send_close_req(struct cxgbi_sock *csk)
 423 {
 424         struct sk_buff *skb = csk->cpl_close;
 425         struct cpl_close_con_req *req = (struct cpl_close_con_req *)skb->head;
 426         unsigned int tid = csk->tid;
 427
 428         log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
 429                 "csk 0x%p,%u,0x%lx, tid %u.\n",
 430                 csk, csk->state, csk->flags, csk->tid);
 431         csk->cpl_close = NULL;
 432         set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id);
 433         INIT_TP_WR(req, tid);
 434         OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_CLOSE_CON_REQ, tid));
 435         req->rsvd = 0;
 436
 437         cxgbi_sock_skb_entail(csk, skb);
 438         if (csk->state >= CTP_ESTABLISHED)
 439                 push_tx_frames(csk, 1);
 440 }
 441
 442 static void abort_arp_failure(void *handle, struct sk_buff *skb)
 443 {
 444         struct cxgbi_sock *csk = (struct cxgbi_sock *)handle;
 445         struct cpl_abort_req *req;
 446
 447         log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
 448                 "csk 0x%p,%u,0x%lx, tid %u, abort.\n",
 449                 csk, csk->state, csk->flags, csk->tid);
 450         req = (struct cpl_abort_req *)skb->data;
 451         req->cmd = CPL_ABORT_NO_RST;
 452         cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
 453 }
 454
 455 static void send_abort_req(struct cxgbi_sock *csk)
 456 {
 457         struct cpl_abort_req *req;
 458         struct sk_buff *skb = csk->cpl_abort_req;
 459
 460         if (unlikely(csk->state == CTP_ABORTING) || !skb || !csk->cdev)
 461                 return;
 462
 463         if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT)) {
 464                 send_tx_flowc_wr(csk);
 465                 cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT);
 466         }
 467
 468         cxgbi_sock_set_state(csk, CTP_ABORTING);
 469         cxgbi_sock_set_flag(csk, CTPF_ABORT_RPL_PENDING);
 470         cxgbi_sock_purge_write_queue(csk);
 471
 472         csk->cpl_abort_req = NULL;
 473         req = (struct cpl_abort_req *)skb->head;
 474         set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id);
 475         req->cmd = CPL_ABORT_SEND_RST;
 476         t4_set_arp_err_handler(skb, csk, abort_arp_failure);
 477         INIT_TP_WR(req, csk->tid);
 478         OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_REQ, csk->tid));
 479         req->rsvd0 = htonl(csk->snd_nxt);
 480         req->rsvd1 = !cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT);
 481
 482         log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
 483                 "csk 0x%p,%u,0x%lx,%u, snd_nxt %u, 0x%x.\n",
 484                 csk, csk->state, csk->flags, csk->tid, csk->snd_nxt,
 485                 req->rsvd1);
 486
 487         cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t);
 488 }
 489
 490 static void send_abort_rpl(struct cxgbi_sock *csk, int rst_status)
 491 {
 492         struct sk_buff *skb = csk->cpl_abort_rpl;
 493         struct cpl_abort_rpl *rpl = (struct cpl_abort_rpl *)skb->head;
 494
 495         log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
 496                 "csk 0x%p,%u,0x%lx,%u, status %d.\n",
 497                 csk, csk->state, csk->flags, csk->tid, rst_status);
 498
 499         csk->cpl_abort_rpl = NULL;
 500         set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id);
 501         INIT_TP_WR(rpl, csk->tid);
 502         OPCODE_TID(rpl) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_RPL, csk->tid));
 503         rpl->cmd = rst_status;
 504         cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
 505 }
 506
 507 /*
 508  * CPL connection rx data ack: host ->
 509  * Send RX credits through an RX_DATA_ACK CPL message. Returns the number of
 510  * credits sent.
 511  */
 512 static u32 send_rx_credits(struct cxgbi_sock *csk, u32 credits)
 513 {
 514         struct sk_buff *skb;
 515         struct cpl_rx_data_ack *req;
 516
 517         log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
 518                 "csk 0x%p,%u,0x%lx,%u, credit %u.\n",
 519                 csk, csk->state, csk->flags, csk->tid, credits);
 520
 521         skb = alloc_wr(sizeof(*req), 0, GFP_ATOMIC);
 522         if (!skb) {
 523                 pr_info("csk 0x%p, credit %u, OOM.\n", csk, credits);
 524                 return 0;
 525         }
 526         req = (struct cpl_rx_data_ack *)skb->head;
 527
 528         set_wr_txq(skb, CPL_PRIORITY_ACK, csk->port_id);
 529         INIT_TP_WR(req, csk->tid);
 530         OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_RX_DATA_ACK,
 531                                       csk->tid));
 532         req->credit_dack = cpu_to_be32(RX_CREDITS_V(credits)
 533                                        | RX_FORCE_ACK_F);
 534         cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
 535         return credits;
 536 }
 537
 538 /*
 539  * sgl_len - calculates the size of an SGL of the given capacity
 540  * @n: the number of SGL entries
 541  * Calculates the number of flits needed for a scatter/gather list that
 542  * can hold the given number of entries.
 543  */
 544 static inline unsigned int sgl_len(unsigned int n)
 545 {
 546         n--;
 547         return (3 * n) / 2 + (n & 1) + 2;
 548 }
 549
 550 /*
 551  * calc_tx_flits_ofld - calculate # of flits for an offload packet
 552  * @skb: the packet
 553  *
 554  * Returns the number of flits needed for the given offload packet.
 555  * These packets are already fully constructed and no additional headers
 556  * will be added.
 557  */
 558 static inline unsigned int calc_tx_flits_ofld(const struct sk_buff *skb)
 559 {
 560         unsigned int flits, cnt;
 561
 562         if (is_ofld_imm(skb))
 563                 return DIV_ROUND_UP(skb->len, 8);
 564         flits = skb_transport_offset(skb) / 8;
 565         cnt = skb_shinfo(skb)->nr_frags;
 566         if (skb_tail_pointer(skb) != skb_transport_header(skb))
 567                 cnt++;
 568         return flits + sgl_len(cnt);
 569 }
 570
 571 #define FLOWC_WR_NPARAMS_MIN    9
 572 static inline int tx_flowc_wr_credits(int *nparamsp, int *flowclenp)
 573 {
 574         int nparams, flowclen16, flowclen;
 575
 576         nparams = FLOWC_WR_NPARAMS_MIN;
 577         flowclen = offsetof(struct fw_flowc_wr, mnemval[nparams]);
 578         flowclen16 = DIV_ROUND_UP(flowclen, 16);
 579         flowclen = flowclen16 * 16;
 580         /*
 581          * Return the number of 16-byte credits used by the FlowC request.
 582          * Pass back the nparams and actual FlowC length if requested.
 583          */
 584         if (nparamsp)
 585                 *nparamsp = nparams;
 586         if (flowclenp)
 587                 *flowclenp = flowclen;
 588
 589         return flowclen16;
 590 }
 591
 592 static inline int send_tx_flowc_wr(struct cxgbi_sock *csk)
 593 {
 594         struct sk_buff *skb;
 595         struct fw_flowc_wr *flowc;
 596         int nparams, flowclen16, flowclen;
 597
 598         flowclen16 = tx_flowc_wr_credits(&nparams, &flowclen);
 599         skb = alloc_wr(flowclen, 0, GFP_ATOMIC);
 600         flowc = (struct fw_flowc_wr *)skb->head;
 601         flowc->op_to_nparams =
 602                 htonl(FW_WR_OP_V(FW_FLOWC_WR) | FW_FLOWC_WR_NPARAMS_V(nparams));
 603         flowc->flowid_len16 =
 604                 htonl(FW_WR_LEN16_V(flowclen16) | FW_WR_FLOWID_V(csk->tid));
 605         flowc->mnemval[0].mnemonic = FW_FLOWC_MNEM_PFNVFN;
 606         flowc->mnemval[0].val = htonl(csk->cdev->pfvf);
 607         flowc->mnemval[1].mnemonic = FW_FLOWC_MNEM_CH;
 608         flowc->mnemval[1].val = htonl(csk->tx_chan);
 609         flowc->mnemval[2].mnemonic = FW_FLOWC_MNEM_PORT;
 610         flowc->mnemval[2].val = htonl(csk->tx_chan);
 611         flowc->mnemval[3].mnemonic = FW_FLOWC_MNEM_IQID;
 612         flowc->mnemval[3].val = htonl(csk->rss_qid);
 613         flowc->mnemval[4].mnemonic = FW_FLOWC_MNEM_SNDNXT;
 614         flowc->mnemval[4].val = htonl(csk->snd_nxt);
 615         flowc->mnemval[5].mnemonic = FW_FLOWC_MNEM_RCVNXT;
 616         flowc->mnemval[5].val = htonl(csk->rcv_nxt);
 617         flowc->mnemval[6].mnemonic = FW_FLOWC_MNEM_SNDBUF;
 618         flowc->mnemval[6].val = htonl(csk->snd_win);
 619         flowc->mnemval[7].mnemonic = FW_FLOWC_MNEM_MSS;
 620         flowc->mnemval[7].val = htonl(csk->advmss);
 621         flowc->mnemval[8].mnemonic = 0;
 622         flowc->mnemval[8].val = 0;
 623         flowc->mnemval[8].mnemonic = FW_FLOWC_MNEM_TXDATAPLEN_MAX;
 624         flowc->mnemval[8].val = 16384;
 625
 626         set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id);
 627
 628         log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
 629                 "csk 0x%p, tid 0x%x, %u,%u,%u,%u,%u,%u,%u.\n",
 630                 csk, csk->tid, 0, csk->tx_chan, csk->rss_qid,
 631                 csk->snd_nxt, csk->rcv_nxt, csk->snd_win,
 632                 csk->advmss);
 633
 634         cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
 635
 636         return flowclen16;
 637 }
 638
 639 static inline void make_tx_data_wr(struct cxgbi_sock *csk, struct sk_buff *skb,
 640                                    int dlen, int len, u32 credits, int compl)
 641 {
 642         struct fw_ofld_tx_data_wr *req;
 643         unsigned int submode = cxgbi_skcb_ulp_mode(skb) & 3;
 644         unsigned int wr_ulp_mode = 0, val;
 645         bool imm = is_ofld_imm(skb);
 646
 647         req = (struct fw_ofld_tx_data_wr *)__skb_push(skb, sizeof(*req));
 648
 649         if (imm) {
 650                 req->op_to_immdlen = htonl(FW_WR_OP_V(FW_OFLD_TX_DATA_WR) |
 651                                         FW_WR_COMPL_F |
 652                                         FW_WR_IMMDLEN_V(dlen));
 653                 req->flowid_len16 = htonl(FW_WR_FLOWID_V(csk->tid) |
 654                                                 FW_WR_LEN16_V(credits));
 655         } else {
 656                 req->op_to_immdlen =
 657                         cpu_to_be32(FW_WR_OP_V(FW_OFLD_TX_DATA_WR) |
 658                                         FW_WR_COMPL_F |
 659                                         FW_WR_IMMDLEN_V(0));
 660                 req->flowid_len16 =
 661                         cpu_to_be32(FW_WR_FLOWID_V(csk->tid) |
 662                                         FW_WR_LEN16_V(credits));
 663         }
 664         if (submode)
 665                 wr_ulp_mode = FW_OFLD_TX_DATA_WR_ULPMODE_V(ULP2_MODE_ISCSI) |
 666                                 FW_OFLD_TX_DATA_WR_ULPSUBMODE_V(submode);
 667         val = skb_peek(&csk->write_queue) ? 0 : 1;
 668         req->tunnel_to_proxy = htonl(wr_ulp_mode |
 669                                      FW_OFLD_TX_DATA_WR_SHOVE_V(val));
 670         req->plen = htonl(len);
 671         if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT))
 672                 cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT);
 673 }
 674
 675 static void arp_failure_skb_discard(void *handle, struct sk_buff *skb)
 676 {
 677         kfree_skb(skb);
 678 }
 679
 680 static int push_tx_frames(struct cxgbi_sock *csk, int req_completion)
 681 {
 682         int total_size = 0;
 683         struct sk_buff *skb;
 684
 685         if (unlikely(csk->state < CTP_ESTABLISHED ||
 686                 csk->state == CTP_CLOSE_WAIT_1 || csk->state >= CTP_ABORTING)) {
 687                 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK |
 688                          1 << CXGBI_DBG_PDU_TX,
 689                         "csk 0x%p,%u,0x%lx,%u, in closing state.\n",
 690                         csk, csk->state, csk->flags, csk->tid);
 691                 return 0;
 692         }
 693
 694         while (csk->wr_cred && (skb = skb_peek(&csk->write_queue)) != NULL) {
 695                 int dlen = skb->len;
 696                 int len = skb->len;
 697                 unsigned int credits_needed;
 698                 int flowclen16 = 0;
 699
 700                 skb_reset_transport_header(skb);
 701                 if (is_ofld_imm(skb))
 702                         credits_needed = DIV_ROUND_UP(dlen, 16);
 703                 else
 704                         credits_needed = DIV_ROUND_UP(
 705                                                 8 * calc_tx_flits_ofld(skb),
 706                                                 16);
 707
 708                 if (likely(cxgbi_skcb_test_flag(skb, SKCBF_TX_NEED_HDR)))
 709                         credits_needed += DIV_ROUND_UP(
 710                                         sizeof(struct fw_ofld_tx_data_wr),
 711                                         16);
 712
 713                 /*
 714                  * Assumes the initial credits is large enough to support
 715                  * fw_flowc_wr plus largest possible first payload
 716                  */
 717                 if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT)) {
 718                         flowclen16 = send_tx_flowc_wr(csk);
 719                         csk->wr_cred -= flowclen16;
 720                         csk->wr_una_cred += flowclen16;
 721                         cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT);
 722                 }
 723
 724                 if (csk->wr_cred < credits_needed) {
 725                         log_debug(1 << CXGBI_DBG_PDU_TX,
 726                                 "csk 0x%p, skb %u/%u, wr %d < %u.\n",
 727                                 csk, skb->len, skb->data_len,
 728                                 credits_needed, csk->wr_cred);
 729                         break;
 730                 }
 731                 __skb_unlink(skb, &csk->write_queue);
 732                 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id);
 733                 skb->csum = credits_needed + flowclen16;
 734                 csk->wr_cred -= credits_needed;
 735                 csk->wr_una_cred += credits_needed;
 736                 cxgbi_sock_enqueue_wr(csk, skb);
 737
 738                 log_debug(1 << CXGBI_DBG_PDU_TX,
 739                         "csk 0x%p, skb %u/%u, wr %d, left %u, unack %u.\n",
 740                         csk, skb->len, skb->data_len, credits_needed,
 741                         csk->wr_cred, csk->wr_una_cred);
 742
 743                 if (likely(cxgbi_skcb_test_flag(skb, SKCBF_TX_NEED_HDR))) {
 744                         len += cxgbi_ulp_extra_len(cxgbi_skcb_ulp_mode(skb));
 745                         make_tx_data_wr(csk, skb, dlen, len, credits_needed,
 746                                         req_completion);
 747                         csk->snd_nxt += len;
 748                         cxgbi_skcb_clear_flag(skb, SKCBF_TX_NEED_HDR);
 749                 } else if (cxgbi_skcb_test_flag(skb, SKCBF_TX_FLAG_COMPL) &&
 750                            (csk->wr_una_cred >= (csk->wr_max_cred / 2))) {
 751                         struct cpl_close_con_req *req =
 752                                 (struct cpl_close_con_req *)skb->data;
 753                         req->wr.wr_hi |= htonl(FW_WR_COMPL_F);
 754                 }
 755                 total_size += skb->truesize;
 756                 t4_set_arp_err_handler(skb, csk, arp_failure_skb_discard);
 757
 758                 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_TX,
 759                         "csk 0x%p,%u,0x%lx,%u, skb 0x%p, %u.\n",
 760                         csk, csk->state, csk->flags, csk->tid, skb, len);
 761
 762                 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t);
 763         }
 764         return total_size;
 765 }
 766
 767 static inline void free_atid(struct cxgbi_sock *csk)
 768 {
 769         struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev);
 770
 771         if (cxgbi_sock_flag(csk, CTPF_HAS_ATID)) {
 772                 cxgb4_free_atid(lldi->tids, csk->atid);
 773                 cxgbi_sock_clear_flag(csk, CTPF_HAS_ATID);
 774                 cxgbi_sock_put(csk);
 775         }
 776 }
 777
 778 static void do_act_establish(struct cxgbi_device *cdev, struct sk_buff *skb)
 779 {
 780         struct cxgbi_sock *csk;
 781         struct cpl_act_establish *req = (struct cpl_act_establish *)skb->data;
 782         unsigned short tcp_opt = ntohs(req->tcp_opt);
 783         unsigned int tid = GET_TID(req);
 784         unsigned int atid = TID_TID_G(ntohl(req->tos_atid));
 785         struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
 786         struct tid_info *t = lldi->tids;
 787         u32 rcv_isn = be32_to_cpu(req->rcv_isn);
 788
 789         csk = lookup_atid(t, atid);
 790         if (unlikely(!csk)) {
 791                 pr_err("NO conn. for atid %u, cdev 0x%p.\n", atid, cdev);
 792                 goto rel_skb;
 793         }
 794
 795         if (csk->atid != atid) {
 796                 pr_err("bad conn atid %u, csk 0x%p,%u,0x%lx,tid %u, atid %u.\n",
 797                         atid, csk, csk->state, csk->flags, csk->tid, csk->atid);
 798                 goto rel_skb;
 799         }
 800
 801         pr_info_ipaddr("atid 0x%x, tid 0x%x, csk 0x%p,%u,0x%lx, isn %u.\n",
 802                        (&csk->saddr), (&csk->daddr),
 803                        atid, tid, csk, csk->state, csk->flags, rcv_isn);
 804
 805         module_put(cdev->owner);
 806
 807         cxgbi_sock_get(csk);
 808         csk->tid = tid;
 809         cxgb4_insert_tid(lldi->tids, csk, tid);
 810         cxgbi_sock_set_flag(csk, CTPF_HAS_TID);
 811
 812         free_atid(csk);
 813
 814         spin_lock_bh(&csk->lock);
 815         if (unlikely(csk->state != CTP_ACTIVE_OPEN))
 816                 pr_info("csk 0x%p,%u,0x%lx,%u, got EST.\n",
 817                         csk, csk->state, csk->flags, csk->tid);
 818
 819         if (csk->retry_timer.function) {
 820                 del_timer(&csk->retry_timer);
 821                 csk->retry_timer.function = NULL;
 822         }
 823
 824         csk->copied_seq = csk->rcv_wup = csk->rcv_nxt = rcv_isn;
 825         /*
 826          * Causes the first RX_DATA_ACK to supply any Rx credits we couldn't
 827          * pass through opt0.
 828          */
 829         if (csk->rcv_win > (RCV_BUFSIZ_MASK << 10))
 830                 csk->rcv_wup -= csk->rcv_win - (RCV_BUFSIZ_MASK << 10);
 831
 832         csk->advmss = lldi->mtus[TCPOPT_MSS_G(tcp_opt)] - 40;
 833         if (TCPOPT_TSTAMP_G(tcp_opt))
 834                 csk->advmss -= 12;
 835         if (csk->advmss < 128)
 836                 csk->advmss = 128;
 837
 838         log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
 839                 "csk 0x%p, mss_idx %u, advmss %u.\n",
 840                         csk, TCPOPT_MSS_G(tcp_opt), csk->advmss);
 841
 842         cxgbi_sock_established(csk, ntohl(req->snd_isn), ntohs(req->tcp_opt));
 843
 844         if (unlikely(cxgbi_sock_flag(csk, CTPF_ACTIVE_CLOSE_NEEDED)))
 845                 send_abort_req(csk);
 846         else {
 847                 if (skb_queue_len(&csk->write_queue))
 848                         push_tx_frames(csk, 0);
 849                 cxgbi_conn_tx_open(csk);
 850         }
 851         spin_unlock_bh(&csk->lock);
 852
 853 rel_skb:
 854         __kfree_skb(skb);
 855 }
 856
 857 static int act_open_rpl_status_to_errno(int status)
 858 {
 859         switch (status) {
 860         case CPL_ERR_CONN_RESET:
 861                 return -ECONNREFUSED;
 862         case CPL_ERR_ARP_MISS:
 863                 return -EHOSTUNREACH;
 864         case CPL_ERR_CONN_TIMEDOUT:
 865                 return -ETIMEDOUT;
 866         case CPL_ERR_TCAM_FULL:
 867                 return -ENOMEM;
 868         case CPL_ERR_CONN_EXIST:
 869                 return -EADDRINUSE;
 870         default:
 871                 return -EIO;
 872         }
 873 }
 874
 875 static void csk_act_open_retry_timer(unsigned long data)
 876 {
 877         struct sk_buff *skb = NULL;
 878         struct cxgbi_sock *csk = (struct cxgbi_sock *)data;
 879         struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev);
 880         void (*send_act_open_func)(struct cxgbi_sock *, struct sk_buff *,
 881                                    struct l2t_entry *);
 882         int t4 = is_t4(lldi->adapter_type), size, size6;
 883
 884         log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
 885                 "csk 0x%p,%u,0x%lx,%u.\n",
 886                 csk, csk->state, csk->flags, csk->tid);
 887
 888         cxgbi_sock_get(csk);
 889         spin_lock_bh(&csk->lock);
 890
 891         if (t4) {
 892                 size = sizeof(struct cpl_act_open_req);
 893                 size6 = sizeof(struct cpl_act_open_req6);
 894         } else {
 895                 size = sizeof(struct cpl_t5_act_open_req);
 896                 size6 = sizeof(struct cpl_t5_act_open_req6);
 897         }
 898
 899         if (csk->csk_family == AF_INET) {
 900                 send_act_open_func = send_act_open_req;
 901                 skb = alloc_wr(size, 0, GFP_ATOMIC);
 902 #if IS_ENABLED(CONFIG_IPV6)
 903         } else {
 904                 send_act_open_func = send_act_open_req6;
 905                 skb = alloc_wr(size6, 0, GFP_ATOMIC);
 906 #endif
 907         }
 908
 909         if (!skb)
 910                 cxgbi_sock_fail_act_open(csk, -ENOMEM);
 911         else {
 912                 skb->sk = (struct sock *)csk;
 913                 t4_set_arp_err_handler(skb, csk,
 914                                        cxgbi_sock_act_open_req_arp_failure);
 915                 send_act_open_func(csk, skb, csk->l2t);
 916         }
 917
 918         spin_unlock_bh(&csk->lock);
 919         cxgbi_sock_put(csk);
 920
 921 }
 922
 923 static inline bool is_neg_adv(unsigned int status)
 924 {
 925         return status == CPL_ERR_RTX_NEG_ADVICE ||
 926                 status == CPL_ERR_KEEPALV_NEG_ADVICE ||
 927                 status == CPL_ERR_PERSIST_NEG_ADVICE;
 928 }
 929
 930 static void do_act_open_rpl(struct cxgbi_device *cdev, struct sk_buff *skb)
 931 {
 932         struct cxgbi_sock *csk;
 933         struct cpl_act_open_rpl *rpl = (struct cpl_act_open_rpl *)skb->data;
 934         unsigned int tid = GET_TID(rpl);
 935         unsigned int atid =
 936                 TID_TID_G(AOPEN_ATID_G(be32_to_cpu(rpl->atid_status)));
 937         unsigned int status = AOPEN_STATUS_G(be32_to_cpu(rpl->atid_status));
 938         struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
 939         struct tid_info *t = lldi->tids;
 940
 941         csk = lookup_atid(t, atid);
 942         if (unlikely(!csk)) {
 943                 pr_err("NO matching conn. atid %u, tid %u.\n", atid, tid);
 944                 goto rel_skb;
 945         }
 946
 947         pr_info_ipaddr("tid %u/%u, status %u.\n"
 948                        "csk 0x%p,%u,0x%lx. ", (&csk->saddr), (&csk->daddr),
 949                        atid, tid, status, csk, csk->state, csk->flags);
 950
 951         if (is_neg_adv(status))
 952                 goto rel_skb;
 953
 954         module_put(cdev->owner);
 955
 956         if (status && status != CPL_ERR_TCAM_FULL &&
 957             status != CPL_ERR_CONN_EXIST &&
 958             status != CPL_ERR_ARP_MISS)
 959                 cxgb4_remove_tid(lldi->tids, csk->port_id, GET_TID(rpl));
 960
 961         cxgbi_sock_get(csk);
 962         spin_lock_bh(&csk->lock);
 963
 964         if (status == CPL_ERR_CONN_EXIST &&
 965             csk->retry_timer.function != csk_act_open_retry_timer) {
 966                 csk->retry_timer.function = csk_act_open_retry_timer;
 967                 mod_timer(&csk->retry_timer, jiffies + HZ / 2);
 968         } else
 969                 cxgbi_sock_fail_act_open(csk,
 970                                         act_open_rpl_status_to_errno(status));
 971
 972         spin_unlock_bh(&csk->lock);
 973         cxgbi_sock_put(csk);
 974 rel_skb:
 975         __kfree_skb(skb);
 976 }
 977
 978 static void do_peer_close(struct cxgbi_device *cdev, struct sk_buff *skb)
 979 {
 980         struct cxgbi_sock *csk;
 981         struct cpl_peer_close *req = (struct cpl_peer_close *)skb->data;
 982         unsigned int tid = GET_TID(req);
 983         struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
 984         struct tid_info *t = lldi->tids;
 985
 986         csk = lookup_tid(t, tid);
 987         if (unlikely(!csk)) {
 988                 pr_err("can't find connection for tid %u.\n", tid);
 989                 goto rel_skb;
 990         }
 991         pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u.\n",
 992                        (&csk->saddr), (&csk->daddr),
 993                        csk, csk->state, csk->flags, csk->tid);
 994         cxgbi_sock_rcv_peer_close(csk);
 995 rel_skb:
 996         __kfree_skb(skb);
 997 }
 998
 999 static void do_close_con_rpl(struct cxgbi_device *cdev, struct sk_buff *skb)
1000 {
1001         struct cxgbi_sock *csk;
1002         struct cpl_close_con_rpl *rpl = (struct cpl_close_con_rpl *)skb->data;
1003         unsigned int tid = GET_TID(rpl);
1004         struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1005         struct tid_info *t = lldi->tids;
1006
1007         csk = lookup_tid(t, tid);
1008         if (unlikely(!csk)) {
1009                 pr_err("can't find connection for tid %u.\n", tid);
1010                 goto rel_skb;
1011         }
1012         pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u.\n",
1013                        (&csk->saddr), (&csk->daddr),
1014                        csk, csk->state, csk->flags, csk->tid);
1015         cxgbi_sock_rcv_close_conn_rpl(csk, ntohl(rpl->snd_nxt));
1016 rel_skb:
1017         __kfree_skb(skb);
1018 }
1019
1020 static int abort_status_to_errno(struct cxgbi_sock *csk, int abort_reason,
1021                                                                 int *need_rst)
1022 {
1023         switch (abort_reason) {
1024         case CPL_ERR_BAD_SYN: /* fall through */
1025         case CPL_ERR_CONN_RESET:
1026                 return csk->state > CTP_ESTABLISHED ?
1027                         -EPIPE : -ECONNRESET;
1028         case CPL_ERR_XMIT_TIMEDOUT:
1029         case CPL_ERR_PERSIST_TIMEDOUT:
1030         case CPL_ERR_FINWAIT2_TIMEDOUT:
1031         case CPL_ERR_KEEPALIVE_TIMEDOUT:
1032                 return -ETIMEDOUT;
1033         default:
1034                 return -EIO;
1035         }
1036 }
1037
1038 static void do_abort_req_rss(struct cxgbi_device *cdev, struct sk_buff *skb)
1039 {
1040         struct cxgbi_sock *csk;
1041         struct cpl_abort_req_rss *req = (struct cpl_abort_req_rss *)skb->data;
1042         unsigned int tid = GET_TID(req);
1043         struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1044         struct tid_info *t = lldi->tids;
1045         int rst_status = CPL_ABORT_NO_RST;
1046
1047         csk = lookup_tid(t, tid);
1048         if (unlikely(!csk)) {
1049                 pr_err("can't find connection for tid %u.\n", tid);
1050                 goto rel_skb;
1051         }
1052
1053         pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u, status %u.\n",
1054                        (&csk->saddr), (&csk->daddr),
1055                        csk, csk->state, csk->flags, csk->tid, req->status);
1056
1057         if (is_neg_adv(req->status))
1058                 goto rel_skb;
1059
1060         cxgbi_sock_get(csk);
1061         spin_lock_bh(&csk->lock);
1062
1063         cxgbi_sock_clear_flag(csk, CTPF_ABORT_REQ_RCVD);
1064
1065         if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT)) {
1066                 send_tx_flowc_wr(csk);
1067                 cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT);
1068         }
1069
1070         cxgbi_sock_set_flag(csk, CTPF_ABORT_REQ_RCVD);
1071         cxgbi_sock_set_state(csk, CTP_ABORTING);
1072
1073         send_abort_rpl(csk, rst_status);
1074
1075         if (!cxgbi_sock_flag(csk, CTPF_ABORT_RPL_PENDING)) {
1076                 csk->err = abort_status_to_errno(csk, req->status, &rst_status);
1077                 cxgbi_sock_closed(csk);
1078         }
1079
1080         spin_unlock_bh(&csk->lock);
1081         cxgbi_sock_put(csk);
1082 rel_skb:
1083         __kfree_skb(skb);
1084 }
1085
1086 static void do_abort_rpl_rss(struct cxgbi_device *cdev, struct sk_buff *skb)
1087 {
1088         struct cxgbi_sock *csk;
1089         struct cpl_abort_rpl_rss *rpl = (struct cpl_abort_rpl_rss *)skb->data;
1090         unsigned int tid = GET_TID(rpl);
1091         struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1092         struct tid_info *t = lldi->tids;
1093
1094         csk = lookup_tid(t, tid);
1095         if (!csk)
1096                 goto rel_skb;
1097
1098         if (csk)
1099                 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u, status %u.\n",
1100                                (&csk->saddr), (&csk->daddr), csk,
1101                                csk->state, csk->flags, csk->tid, rpl->status);
1102
1103         if (rpl->status == CPL_ERR_ABORT_FAILED)
1104                 goto rel_skb;
1105
1106         cxgbi_sock_rcv_abort_rpl(csk);
1107 rel_skb:
1108         __kfree_skb(skb);
1109 }
1110
1111 static void do_rx_data(struct cxgbi_device *cdev, struct sk_buff *skb)
1112 {
1113         struct cxgbi_sock *csk;
1114         struct cpl_rx_data *cpl = (struct cpl_rx_data *)skb->data;
1115         unsigned int tid = GET_TID(cpl);
1116         struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1117         struct tid_info *t = lldi->tids;
1118
1119         csk = lookup_tid(t, tid);
1120         if (!csk) {
1121                 pr_err("can't find connection for tid %u.\n", tid);
1122         } else {
1123                 /* not expecting this, reset the connection. */
1124                 pr_err("csk 0x%p, tid %u, rcv cpl_rx_data.\n", csk, tid);
1125                 spin_lock_bh(&csk->lock);
1126                 send_abort_req(csk);
1127                 spin_unlock_bh(&csk->lock);
1128         }
1129         __kfree_skb(skb);
1130 }
1131
1132 static void do_rx_iscsi_hdr(struct cxgbi_device *cdev, struct sk_buff *skb)
1133 {
1134         struct cxgbi_sock *csk;
1135         struct cpl_iscsi_hdr *cpl = (struct cpl_iscsi_hdr *)skb->data;
1136         unsigned short pdu_len_ddp = be16_to_cpu(cpl->pdu_len_ddp);
1137         unsigned int tid = GET_TID(cpl);
1138         struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1139         struct tid_info *t = lldi->tids;
1140
1141         csk = lookup_tid(t, tid);
1142         if (unlikely(!csk)) {
1143                 pr_err("can't find conn. for tid %u.\n", tid);
1144                 goto rel_skb;
1145         }
1146
1147         log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
1148                 "csk 0x%p,%u,0x%lx, tid %u, skb 0x%p,%u, 0x%x.\n",
1149                 csk, csk->state, csk->flags, csk->tid, skb, skb->len,
1150                 pdu_len_ddp);
1151
1152         spin_lock_bh(&csk->lock);
1153
1154         if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) {
1155                 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1156                         "csk 0x%p,%u,0x%lx,%u, bad state.\n",
1157                         csk, csk->state, csk->flags, csk->tid);
1158                 if (csk->state != CTP_ABORTING)
1159                         goto abort_conn;
1160                 else
1161                         goto discard;
1162         }
1163
1164         cxgbi_skcb_tcp_seq(skb) = ntohl(cpl->seq);
1165         cxgbi_skcb_flags(skb) = 0;
1166
1167         skb_reset_transport_header(skb);
1168         __skb_pull(skb, sizeof(*cpl));
1169         __pskb_trim(skb, ntohs(cpl->len));
1170
1171         if (!csk->skb_ulp_lhdr) {
1172                 unsigned char *bhs;
1173                 unsigned int hlen, dlen, plen;
1174
1175                 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
1176                         "csk 0x%p,%u,0x%lx, tid %u, skb 0x%p header.\n",
1177                         csk, csk->state, csk->flags, csk->tid, skb);
1178                 csk->skb_ulp_lhdr = skb;
1179                 cxgbi_skcb_set_flag(skb, SKCBF_RX_HDR);
1180
1181                 if (cxgbi_skcb_tcp_seq(skb) != csk->rcv_nxt) {
1182                         pr_info("tid %u, CPL_ISCSI_HDR, bad seq, 0x%x/0x%x.\n",
1183                                 csk->tid, cxgbi_skcb_tcp_seq(skb),
1184                                 csk->rcv_nxt);
1185                         goto abort_conn;
1186                 }
1187
1188                 bhs = skb->data;
1189                 hlen = ntohs(cpl->len);
1190                 dlen = ntohl(*(unsigned int *)(bhs + 4)) & 0xFFFFFF;
1191
1192                 plen = ISCSI_PDU_LEN_G(pdu_len_ddp);
1193                 if (is_t4(lldi->adapter_type))
1194                         plen -= 40;
1195
1196                 if ((hlen + dlen) != plen) {
1197                         pr_info("tid 0x%x, CPL_ISCSI_HDR, pdu len "
1198                                 "mismatch %u != %u + %u, seq 0x%x.\n",
1199                                 csk->tid, plen, hlen, dlen,
1200                                 cxgbi_skcb_tcp_seq(skb));
1201                         goto abort_conn;
1202                 }
1203
1204                 cxgbi_skcb_rx_pdulen(skb) = (hlen + dlen + 3) & (~0x3);
1205                 if (dlen)
1206                         cxgbi_skcb_rx_pdulen(skb) += csk->dcrc_len;
1207                 csk->rcv_nxt += cxgbi_skcb_rx_pdulen(skb);
1208
1209                 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
1210                         "csk 0x%p, skb 0x%p, 0x%x,%u+%u,0x%x,0x%x.\n",
1211                         csk, skb, *bhs, hlen, dlen,
1212                         ntohl(*((unsigned int *)(bhs + 16))),
1213                         ntohl(*((unsigned int *)(bhs + 24))));
1214
1215         } else {
1216                 struct sk_buff *lskb = csk->skb_ulp_lhdr;
1217
1218                 cxgbi_skcb_set_flag(lskb, SKCBF_RX_DATA);
1219                 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
1220                         "csk 0x%p,%u,0x%lx, skb 0x%p data, 0x%p.\n",
1221                         csk, csk->state, csk->flags, skb, lskb);
1222         }
1223
1224         __skb_queue_tail(&csk->receive_queue, skb);
1225         spin_unlock_bh(&csk->lock);
1226         return;
1227
1228 abort_conn:
1229         send_abort_req(csk);
1230 discard:
1231         spin_unlock_bh(&csk->lock);
1232 rel_skb:
1233         __kfree_skb(skb);
1234 }
1235
1236 static void do_rx_iscsi_data(struct cxgbi_device *cdev, struct sk_buff *skb)
1237 {
1238         struct cxgbi_sock *csk;
1239         struct cpl_iscsi_hdr *cpl = (struct cpl_iscsi_hdr *)skb->data;
1240         struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1241         struct tid_info *t = lldi->tids;
1242         struct sk_buff *lskb;
1243         u32 tid = GET_TID(cpl);
1244         u16 pdu_len_ddp = be16_to_cpu(cpl->pdu_len_ddp);
1245
1246         csk = lookup_tid(t, tid);
1247         if (unlikely(!csk)) {
1248                 pr_err("can't find conn. for tid %u.\n", tid);
1249                 goto rel_skb;
1250         }
1251
1252         log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
1253                   "csk 0x%p,%u,0x%lx, tid %u, skb 0x%p,%u, 0x%x.\n",
1254                   csk, csk->state, csk->flags, csk->tid, skb,
1255                   skb->len, pdu_len_ddp);
1256
1257         spin_lock_bh(&csk->lock);
1258
1259         if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) {
1260                 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1261                           "csk 0x%p,%u,0x%lx,%u, bad state.\n",
1262                           csk, csk->state, csk->flags, csk->tid);
1263
1264                 if (csk->state != CTP_ABORTING)
1265                         goto abort_conn;
1266                 else
1267                         goto discard;
1268         }
1269
1270         cxgbi_skcb_tcp_seq(skb) = be32_to_cpu(cpl->seq);
1271         cxgbi_skcb_flags(skb) = 0;
1272
1273         skb_reset_transport_header(skb);
1274         __skb_pull(skb, sizeof(*cpl));
1275         __pskb_trim(skb, ntohs(cpl->len));
1276
1277         if (!csk->skb_ulp_lhdr)
1278                 csk->skb_ulp_lhdr = skb;
1279
1280         lskb = csk->skb_ulp_lhdr;
1281         cxgbi_skcb_set_flag(lskb, SKCBF_RX_DATA);
1282
1283         log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
1284                   "csk 0x%p,%u,0x%lx, skb 0x%p data, 0x%p.\n",
1285                   csk, csk->state, csk->flags, skb, lskb);
1286
1287         __skb_queue_tail(&csk->receive_queue, skb);
1288         spin_unlock_bh(&csk->lock);
1289         return;
1290
1291 abort_conn:
1292         send_abort_req(csk);
1293 discard:
1294         spin_unlock_bh(&csk->lock);
1295 rel_skb:
1296         __kfree_skb(skb);
1297 }
1298
1299 static void
1300 cxgb4i_process_ddpvld(struct cxgbi_sock *csk,
1301                       struct sk_buff *skb, u32 ddpvld)
1302 {
1303         if (ddpvld & (1 << CPL_RX_DDP_STATUS_HCRC_SHIFT)) {
1304                 pr_info("csk 0x%p, lhdr 0x%p, status 0x%x, hcrc bad 0x%lx.\n",
1305                         csk, skb, ddpvld, cxgbi_skcb_flags(skb));
1306                 cxgbi_skcb_set_flag(skb, SKCBF_RX_HCRC_ERR);
1307         }
1308
1309         if (ddpvld & (1 << CPL_RX_DDP_STATUS_DCRC_SHIFT)) {
1310                 pr_info("csk 0x%p, lhdr 0x%p, status 0x%x, dcrc bad 0x%lx.\n",
1311                         csk, skb, ddpvld, cxgbi_skcb_flags(skb));
1312                 cxgbi_skcb_set_flag(skb, SKCBF_RX_DCRC_ERR);
1313         }
1314
1315         if (ddpvld & (1 << CPL_RX_DDP_STATUS_PAD_SHIFT)) {
1316                 log_debug(1 << CXGBI_DBG_PDU_RX,
1317                           "csk 0x%p, lhdr 0x%p, status 0x%x, pad bad.\n",
1318                           csk, skb, ddpvld);
1319                 cxgbi_skcb_set_flag(skb, SKCBF_RX_PAD_ERR);
1320         }
1321
1322         if ((ddpvld & (1 << CPL_RX_DDP_STATUS_DDP_SHIFT)) &&
1323             !cxgbi_skcb_test_flag(skb, SKCBF_RX_DATA)) {
1324                 log_debug(1 << CXGBI_DBG_PDU_RX,
1325                           "csk 0x%p, lhdr 0x%p, 0x%x, data ddp'ed.\n",
1326                           csk, skb, ddpvld);
1327                 cxgbi_skcb_set_flag(skb, SKCBF_RX_DATA_DDPD);
1328         }
1329 }
1330
1331 static void do_rx_data_ddp(struct cxgbi_device *cdev,
1332                                   struct sk_buff *skb)
1333 {
1334         struct cxgbi_sock *csk;
1335         struct sk_buff *lskb;
1336         struct cpl_rx_data_ddp *rpl = (struct cpl_rx_data_ddp *)skb->data;
1337         unsigned int tid = GET_TID(rpl);
1338         struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1339         struct tid_info *t = lldi->tids;
1340         u32 ddpvld = be32_to_cpu(rpl->ddpvld);
1341
1342         csk = lookup_tid(t, tid);
1343         if (unlikely(!csk)) {
1344                 pr_err("can't find connection for tid %u.\n", tid);
1345                 goto rel_skb;
1346         }
1347
1348         log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
1349                 "csk 0x%p,%u,0x%lx, skb 0x%p,0x%x, lhdr 0x%p.\n",
1350                 csk, csk->state, csk->flags, skb, ddpvld, csk->skb_ulp_lhdr);
1351
1352         spin_lock_bh(&csk->lock);
1353
1354         if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) {
1355                 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1356                         "csk 0x%p,%u,0x%lx,%u, bad state.\n",
1357                         csk, csk->state, csk->flags, csk->tid);
1358                 if (csk->state != CTP_ABORTING)
1359                         goto abort_conn;
1360                 else
1361                         goto discard;
1362         }
1363
1364         if (!csk->skb_ulp_lhdr) {
1365                 pr_err("tid 0x%x, rcv RX_DATA_DDP w/o pdu bhs.\n", csk->tid);
1366                 goto abort_conn;
1367         }
1368
1369         lskb = csk->skb_ulp_lhdr;
1370         csk->skb_ulp_lhdr = NULL;
1371
1372         cxgbi_skcb_rx_ddigest(lskb) = ntohl(rpl->ulp_crc);
1373
1374         if (ntohs(rpl->len) != cxgbi_skcb_rx_pdulen(lskb))
1375                 pr_info("tid 0x%x, RX_DATA_DDP pdulen %u != %u.\n",
1376                         csk->tid, ntohs(rpl->len), cxgbi_skcb_rx_pdulen(lskb));
1377
1378         cxgb4i_process_ddpvld(csk, lskb, ddpvld);
1379
1380         log_debug(1 << CXGBI_DBG_PDU_RX,
1381                 "csk 0x%p, lskb 0x%p, f 0x%lx.\n",
1382                 csk, lskb, cxgbi_skcb_flags(lskb));
1383
1384         cxgbi_skcb_set_flag(lskb, SKCBF_RX_STATUS);
1385         cxgbi_conn_pdu_ready(csk);
1386         spin_unlock_bh(&csk->lock);
1387         goto rel_skb;
1388
1389 abort_conn:
1390         send_abort_req(csk);
1391 discard:
1392         spin_unlock_bh(&csk->lock);
1393 rel_skb:
1394         __kfree_skb(skb);
1395 }
1396
1397 static void
1398 do_rx_iscsi_cmp(struct cxgbi_device *cdev, struct sk_buff *skb)
1399 {
1400         struct cxgbi_sock *csk;
1401         struct cpl_rx_iscsi_cmp *rpl = (struct cpl_rx_iscsi_cmp *)skb->data;
1402         struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1403         struct tid_info *t = lldi->tids;
1404         struct sk_buff *data_skb = NULL;
1405         u32 tid = GET_TID(rpl);
1406         u32 ddpvld = be32_to_cpu(rpl->ddpvld);
1407         u32 seq = be32_to_cpu(rpl->seq);
1408         u16 pdu_len_ddp = be16_to_cpu(rpl->pdu_len_ddp);
1409
1410         csk = lookup_tid(t, tid);
1411         if (unlikely(!csk)) {
1412                 pr_err("can't find connection for tid %u.\n", tid);
1413                 goto rel_skb;
1414         }
1415
1416         log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
1417                   "csk 0x%p,%u,0x%lx, skb 0x%p,0x%x, lhdr 0x%p, len %u, "
1418                   "pdu_len_ddp %u, status %u.\n",
1419                   csk, csk->state, csk->flags, skb, ddpvld, csk->skb_ulp_lhdr,
1420                   ntohs(rpl->len), pdu_len_ddp,  rpl->status);
1421
1422         spin_lock_bh(&csk->lock);
1423
1424         if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) {
1425                 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1426                           "csk 0x%p,%u,0x%lx,%u, bad state.\n",
1427                           csk, csk->state, csk->flags, csk->tid);
1428
1429                 if (csk->state != CTP_ABORTING)
1430                         goto abort_conn;
1431                 else
1432                         goto discard;
1433         }
1434
1435         cxgbi_skcb_tcp_seq(skb) = seq;
1436         cxgbi_skcb_flags(skb) = 0;
1437         cxgbi_skcb_rx_pdulen(skb) = 0;
1438
1439         skb_reset_transport_header(skb);
1440         __skb_pull(skb, sizeof(*rpl));
1441         __pskb_trim(skb, be16_to_cpu(rpl->len));
1442
1443         csk->rcv_nxt = seq + pdu_len_ddp;
1444
1445         if (csk->skb_ulp_lhdr) {
1446                 data_skb = skb_peek(&csk->receive_queue);
1447                 if (!data_skb ||
1448                     !cxgbi_skcb_test_flag(data_skb, SKCBF_RX_DATA)) {
1449                         pr_err("Error! freelist data not found 0x%p, tid %u\n",
1450                                data_skb, tid);
1451
1452                         goto abort_conn;
1453                 }
1454                 __skb_unlink(data_skb, &csk->receive_queue);
1455
1456                 cxgbi_skcb_set_flag(skb, SKCBF_RX_DATA);
1457
1458                 __skb_queue_tail(&csk->receive_queue, skb);
1459                 __skb_queue_tail(&csk->receive_queue, data_skb);
1460         } else {
1461                  __skb_queue_tail(&csk->receive_queue, skb);
1462         }
1463
1464         csk->skb_ulp_lhdr = NULL;
1465
1466         cxgbi_skcb_set_flag(skb, SKCBF_RX_HDR);
1467         cxgbi_skcb_set_flag(skb, SKCBF_RX_STATUS);
1468         cxgbi_skcb_set_flag(skb, SKCBF_RX_ISCSI_COMPL);
1469         cxgbi_skcb_rx_ddigest(skb) = be32_to_cpu(rpl->ulp_crc);
1470
1471         cxgb4i_process_ddpvld(csk, skb, ddpvld);
1472
1473         log_debug(1 << CXGBI_DBG_PDU_RX, "csk 0x%p, skb 0x%p, f 0x%lx.\n",
1474                   csk, skb, cxgbi_skcb_flags(skb));
1475
1476         cxgbi_conn_pdu_ready(csk);
1477         spin_unlock_bh(&csk->lock);
1478
1479         return;
1480
1481 abort_conn:
1482         send_abort_req(csk);
1483 discard:
1484         spin_unlock_bh(&csk->lock);
1485 rel_skb:
1486         __kfree_skb(skb);
1487 }
1488
1489 static void do_fw4_ack(struct cxgbi_device *cdev, struct sk_buff *skb)
1490 {
1491         struct cxgbi_sock *csk;
1492         struct cpl_fw4_ack *rpl = (struct cpl_fw4_ack *)skb->data;
1493         unsigned int tid = GET_TID(rpl);
1494         struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1495         struct tid_info *t = lldi->tids;
1496
1497         csk = lookup_tid(t, tid);
1498         if (unlikely(!csk))
1499                 pr_err("can't find connection for tid %u.\n", tid);
1500         else {
1501                 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1502                         "csk 0x%p,%u,0x%lx,%u.\n",
1503                         csk, csk->state, csk->flags, csk->tid);
1504                 cxgbi_sock_rcv_wr_ack(csk, rpl->credits, ntohl(rpl->snd_una),
1505                                         rpl->seq_vld);
1506         }
1507         __kfree_skb(skb);
1508 }
1509
1510 static void do_set_tcb_rpl(struct cxgbi_device *cdev, struct sk_buff *skb)
1511 {
1512         struct cpl_set_tcb_rpl *rpl = (struct cpl_set_tcb_rpl *)skb->data;
1513         unsigned int tid = GET_TID(rpl);
1514         struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1515         struct tid_info *t = lldi->tids;
1516         struct cxgbi_sock *csk;
1517
1518         csk = lookup_tid(t, tid);
1519         if (!csk)
1520                 pr_err("can't find conn. for tid %u.\n", tid);
1521
1522         log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1523                 "csk 0x%p,%u,%lx,%u, status 0x%x.\n",
1524                 csk, csk->state, csk->flags, csk->tid, rpl->status);
1525
1526         if (rpl->status != CPL_ERR_NONE)
1527                 pr_err("csk 0x%p,%u, SET_TCB_RPL status %u.\n",
1528                         csk, tid, rpl->status);
1529
1530         __kfree_skb(skb);
1531 }
1532
1533 static int alloc_cpls(struct cxgbi_sock *csk)
1534 {
1535         csk->cpl_close = alloc_wr(sizeof(struct cpl_close_con_req),
1536                                         0, GFP_KERNEL);
1537         if (!csk->cpl_close)
1538                 return -ENOMEM;
1539
1540         csk->cpl_abort_req = alloc_wr(sizeof(struct cpl_abort_req),
1541                                         0, GFP_KERNEL);
1542         if (!csk->cpl_abort_req)
1543                 goto free_cpls;
1544
1545         csk->cpl_abort_rpl = alloc_wr(sizeof(struct cpl_abort_rpl),
1546                                         0, GFP_KERNEL);
1547         if (!csk->cpl_abort_rpl)
1548                 goto free_cpls;
1549         return 0;
1550
1551 free_cpls:
1552         cxgbi_sock_free_cpl_skbs(csk);
1553         return -ENOMEM;
1554 }
1555
1556 static inline void l2t_put(struct cxgbi_sock *csk)
1557 {
1558         if (csk->l2t) {
1559                 cxgb4_l2t_release(csk->l2t);
1560                 csk->l2t = NULL;
1561                 cxgbi_sock_put(csk);
1562         }
1563 }
1564
1565 static void release_offload_resources(struct cxgbi_sock *csk)
1566 {
1567         struct cxgb4_lld_info *lldi;
1568 #if IS_ENABLED(CONFIG_IPV6)
1569         struct net_device *ndev = csk->cdev->ports[csk->port_id];
1570 #endif
1571
1572         log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1573                 "csk 0x%p,%u,0x%lx,%u.\n",
1574                 csk, csk->state, csk->flags, csk->tid);
1575
1576         cxgbi_sock_free_cpl_skbs(csk);
1577         if (csk->wr_cred != csk->wr_max_cred) {
1578                 cxgbi_sock_purge_wr_queue(csk);
1579                 cxgbi_sock_reset_wr_list(csk);
1580         }
1581
1582         l2t_put(csk);
1583 #if IS_ENABLED(CONFIG_IPV6)
1584         if (csk->csk_family == AF_INET6)
1585                 cxgb4_clip_release(ndev,
1586                                    (const u32 *)&csk->saddr6.sin6_addr, 1);
1587 #endif
1588
1589         if (cxgbi_sock_flag(csk, CTPF_HAS_ATID))
1590                 free_atid(csk);
1591         else if (cxgbi_sock_flag(csk, CTPF_HAS_TID)) {
1592                 lldi = cxgbi_cdev_priv(csk->cdev);
1593                 cxgb4_remove_tid(lldi->tids, 0, csk->tid);
1594                 cxgbi_sock_clear_flag(csk, CTPF_HAS_TID);
1595                 cxgbi_sock_put(csk);
1596         }
1597         csk->dst = NULL;
1598         csk->cdev = NULL;
1599 }
1600
1601 static int init_act_open(struct cxgbi_sock *csk)
1602 {
1603         struct cxgbi_device *cdev = csk->cdev;
1604         struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1605         struct net_device *ndev = cdev->ports[csk->port_id];
1606         struct sk_buff *skb = NULL;
1607         struct neighbour *n = NULL;
1608         void *daddr;
1609         unsigned int step;
1610         unsigned int size, size6;
1611         unsigned int linkspeed;
1612         unsigned int rcv_winf, snd_winf;
1613
1614         log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1615                 "csk 0x%p,%u,0x%lx,%u.\n",
1616                 csk, csk->state, csk->flags, csk->tid);
1617
1618         if (csk->csk_family == AF_INET)
1619                 daddr = &csk->daddr.sin_addr.s_addr;
1620 #if IS_ENABLED(CONFIG_IPV6)
1621         else if (csk->csk_family == AF_INET6)
1622                 daddr = &csk->daddr6.sin6_addr;
1623 #endif
1624         else {
1625                 pr_err("address family 0x%x not supported\n", csk->csk_family);
1626                 goto rel_resource;
1627         }
1628
1629         n = dst_neigh_lookup(csk->dst, daddr);
1630
1631         if (!n) {
1632                 pr_err("%s, can't get neighbour of csk->dst.\n", ndev->name);
1633                 goto rel_resource;
1634         }
1635
1636         csk->atid = cxgb4_alloc_atid(lldi->tids, csk);
1637         if (csk->atid < 0) {
1638                 pr_err("%s, NO atid available.\n", ndev->name);
1639                 goto rel_resource_without_clip;
1640         }
1641         cxgbi_sock_set_flag(csk, CTPF_HAS_ATID);
1642         cxgbi_sock_get(csk);
1643
1644         csk->l2t = cxgb4_l2t_get(lldi->l2t, n, ndev, 0);
1645         if (!csk->l2t) {
1646                 pr_err("%s, cannot alloc l2t.\n", ndev->name);
1647                 goto rel_resource_without_clip;
1648         }
1649         cxgbi_sock_get(csk);
1650
1651 #if IS_ENABLED(CONFIG_IPV6)
1652         if (csk->csk_family == AF_INET6)
1653                 cxgb4_clip_get(ndev, (const u32 *)&csk->saddr6.sin6_addr, 1);
1654 #endif
1655
1656         if (is_t4(lldi->adapter_type)) {
1657                 size = sizeof(struct cpl_act_open_req);
1658                 size6 = sizeof(struct cpl_act_open_req6);
1659         } else if (is_t5(lldi->adapter_type)) {
1660                 size = sizeof(struct cpl_t5_act_open_req);
1661                 size6 = sizeof(struct cpl_t5_act_open_req6);
1662         } else {
1663                 size = sizeof(struct cpl_t6_act_open_req);
1664                 size6 = sizeof(struct cpl_t6_act_open_req6);
1665         }
1666
1667         if (csk->csk_family == AF_INET)
1668                 skb = alloc_wr(size, 0, GFP_NOIO);
1669 #if IS_ENABLED(CONFIG_IPV6)
1670         else
1671                 skb = alloc_wr(size6, 0, GFP_NOIO);
1672 #endif
1673
1674         if (!skb)
1675                 goto rel_resource;
1676         skb->sk = (struct sock *)csk;
1677         t4_set_arp_err_handler(skb, csk, cxgbi_sock_act_open_req_arp_failure);
1678
1679         if (!csk->mtu)
1680                 csk->mtu = dst_mtu(csk->dst);
1681         cxgb4_best_mtu(lldi->mtus, csk->mtu, &csk->mss_idx);
1682         csk->tx_chan = cxgb4_port_chan(ndev);
1683         csk->smac_idx = cxgb4_tp_smt_idx(lldi->adapter_type,
1684                                          cxgb4_port_viid(ndev));
1685         step = lldi->ntxq / lldi->nchan;
1686         csk->txq_idx = cxgb4_port_idx(ndev) * step;
1687         step = lldi->nrxq / lldi->nchan;
1688         csk->rss_qid = lldi->rxq_ids[cxgb4_port_idx(ndev) * step];
1689         linkspeed = ((struct port_info *)netdev_priv(ndev))->link_cfg.speed;
1690         csk->snd_win = cxgb4i_snd_win;
1691         csk->rcv_win = cxgb4i_rcv_win;
1692         if (cxgb4i_rcv_win <= 0) {
1693                 csk->rcv_win = CXGB4I_DEFAULT_10G_RCV_WIN;
1694                 rcv_winf = linkspeed / SPEED_10000;
1695                 if (rcv_winf)
1696                         csk->rcv_win *= rcv_winf;
1697         }
1698         if (cxgb4i_snd_win <= 0) {
1699                 csk->snd_win = CXGB4I_DEFAULT_10G_SND_WIN;
1700                 snd_winf = linkspeed / SPEED_10000;
1701                 if (snd_winf)
1702                         csk->snd_win *= snd_winf;
1703         }
1704         csk->wr_cred = lldi->wr_cred -
1705                        DIV_ROUND_UP(sizeof(struct cpl_abort_req), 16);
1706         csk->wr_max_cred = csk->wr_cred;
1707         csk->wr_una_cred = 0;
1708         cxgbi_sock_reset_wr_list(csk);
1709         csk->err = 0;
1710
1711         pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u,%u,%u, mtu %u,%u, smac %u.\n",
1712                        (&csk->saddr), (&csk->daddr), csk, csk->state,
1713                        csk->flags, csk->tx_chan, csk->txq_idx, csk->rss_qid,
1714                        csk->mtu, csk->mss_idx, csk->smac_idx);
1715
1716         /* must wait for either a act_open_rpl or act_open_establish */
1717         if (!try_module_get(cdev->owner)) {
1718                 pr_err("%s, try_module_get failed.\n", ndev->name);
1719                 goto rel_resource;
1720         }
1721
1722         cxgbi_sock_set_state(csk, CTP_ACTIVE_OPEN);
1723         if (csk->csk_family == AF_INET)
1724                 send_act_open_req(csk, skb, csk->l2t);
1725 #if IS_ENABLED(CONFIG_IPV6)
1726         else
1727                 send_act_open_req6(csk, skb, csk->l2t);
1728 #endif
1729         neigh_release(n);
1730
1731         return 0;
1732
1733 rel_resource:
1734 #if IS_ENABLED(CONFIG_IPV6)
1735         if (csk->csk_family == AF_INET6)
1736                 cxgb4_clip_release(ndev,
1737                                    (const u32 *)&csk->saddr6.sin6_addr, 1);
1738 #endif
1739 rel_resource_without_clip:
1740         if (n)
1741                 neigh_release(n);
1742         if (skb)
1743                 __kfree_skb(skb);
1744         return -EINVAL;
1745 }
1746
1747 static cxgb4i_cplhandler_func cxgb4i_cplhandlers[NUM_CPL_CMDS] = {
1748         [CPL_ACT_ESTABLISH] = do_act_establish,
1749         [CPL_ACT_OPEN_RPL] = do_act_open_rpl,
1750         [CPL_PEER_CLOSE] = do_peer_close,
1751         [CPL_ABORT_REQ_RSS] = do_abort_req_rss,
1752         [CPL_ABORT_RPL_RSS] = do_abort_rpl_rss,
1753         [CPL_CLOSE_CON_RPL] = do_close_con_rpl,
1754         [CPL_FW4_ACK] = do_fw4_ack,
1755         [CPL_ISCSI_HDR] = do_rx_iscsi_hdr,
1756         [CPL_ISCSI_DATA] = do_rx_iscsi_data,
1757         [CPL_SET_TCB_RPL] = do_set_tcb_rpl,
1758         [CPL_RX_DATA_DDP] = do_rx_data_ddp,
1759         [CPL_RX_ISCSI_DDP] = do_rx_data_ddp,
1760         [CPL_RX_ISCSI_CMP] = do_rx_iscsi_cmp,
1761         [CPL_RX_DATA] = do_rx_data,
1762 };
1763
1764 static int cxgb4i_ofld_init(struct cxgbi_device *cdev)
1765 {
1766         int rc;
1767
1768         if (cxgb4i_max_connect > CXGB4I_MAX_CONN)
1769                 cxgb4i_max_connect = CXGB4I_MAX_CONN;
1770
1771         rc = cxgbi_device_portmap_create(cdev, cxgb4i_sport_base,
1772                                         cxgb4i_max_connect);
1773         if (rc < 0)
1774                 return rc;
1775
1776         cdev->csk_release_offload_resources = release_offload_resources;
1777         cdev->csk_push_tx_frames = push_tx_frames;
1778         cdev->csk_send_abort_req = send_abort_req;
1779         cdev->csk_send_close_req = send_close_req;
1780         cdev->csk_send_rx_credits = send_rx_credits;
1781         cdev->csk_alloc_cpls = alloc_cpls;
1782         cdev->csk_init_act_open = init_act_open;
1783
1784         pr_info("cdev 0x%p, offload up, added.\n", cdev);
1785         return 0;
1786 }
1787
1788 static inline void
1789 ulp_mem_io_set_hdr(struct cxgbi_device *cdev,
1790                    struct ulp_mem_io *req,
1791                    unsigned int wr_len, unsigned int dlen,
1792                    unsigned int pm_addr,
1793                    int tid)
1794 {
1795         struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1796         struct ulptx_idata *idata = (struct ulptx_idata *)(req + 1);
1797
1798         INIT_ULPTX_WR(req, wr_len, 0, tid);
1799         req->wr.wr_hi = htonl(FW_WR_OP_V(FW_ULPTX_WR) |
1800                 FW_WR_ATOMIC_V(0));
1801         req->cmd = htonl(ULPTX_CMD_V(ULP_TX_MEM_WRITE) |
1802                 ULP_MEMIO_ORDER_V(is_t4(lldi->adapter_type)) |
1803                 T5_ULP_MEMIO_IMM_V(!is_t4(lldi->adapter_type)));
1804         req->dlen = htonl(ULP_MEMIO_DATA_LEN_V(dlen >> 5));
1805         req->lock_addr = htonl(ULP_MEMIO_ADDR_V(pm_addr >> 5));
1806         req->len16 = htonl(DIV_ROUND_UP(wr_len - sizeof(req->wr), 16));
1807
1808         idata->cmd_more = htonl(ULPTX_CMD_V(ULP_TX_SC_IMM));
1809         idata->len = htonl(dlen);
1810 }
1811
1812 static struct sk_buff *
1813 ddp_ppod_init_idata(struct cxgbi_device *cdev,
1814                     struct cxgbi_ppm *ppm,
1815                     unsigned int idx, unsigned int npods,
1816                     unsigned int tid)
1817 {
1818         unsigned int pm_addr = (idx << PPOD_SIZE_SHIFT) + ppm->llimit;
1819         unsigned int dlen = npods << PPOD_SIZE_SHIFT;
1820         unsigned int wr_len = roundup(sizeof(struct ulp_mem_io) +
1821                                 sizeof(struct ulptx_idata) + dlen, 16);
1822         struct sk_buff *skb = alloc_wr(wr_len, 0, GFP_ATOMIC);
1823
1824         if (!skb) {
1825                 pr_err("%s: %s idx %u, npods %u, OOM.\n",
1826                        __func__, ppm->ndev->name, idx, npods);
1827                 return NULL;
1828         }
1829
1830         ulp_mem_io_set_hdr(cdev, (struct ulp_mem_io *)skb->head, wr_len, dlen,
1831                            pm_addr, tid);
1832
1833         return skb;
1834 }
1835
1836 static int ddp_ppod_write_idata(struct cxgbi_ppm *ppm, struct cxgbi_sock *csk,
1837                                 struct cxgbi_task_tag_info *ttinfo,
1838                                 unsigned int idx, unsigned int npods,
1839                                 struct scatterlist **sg_pp,
1840                                 unsigned int *sg_off)
1841 {
1842         struct cxgbi_device *cdev = csk->cdev;
1843         struct sk_buff *skb = ddp_ppod_init_idata(cdev, ppm, idx, npods,
1844                                                   csk->tid);
1845         struct ulp_mem_io *req;
1846         struct ulptx_idata *idata;
1847         struct cxgbi_pagepod *ppod;
1848         int i;
1849
1850         if (!skb)
1851                 return -ENOMEM;
1852
1853         req = (struct ulp_mem_io *)skb->head;
1854         idata = (struct ulptx_idata *)(req + 1);
1855         ppod = (struct cxgbi_pagepod *)(idata + 1);
1856
1857         for (i = 0; i < npods; i++, ppod++)
1858                 cxgbi_ddp_set_one_ppod(ppod, ttinfo, sg_pp, sg_off);
1859
1860         cxgbi_skcb_set_flag(skb, SKCBF_TX_MEM_WRITE);
1861         cxgbi_skcb_set_flag(skb, SKCBF_TX_FLAG_COMPL);
1862         set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id);
1863
1864         spin_lock_bh(&csk->lock);
1865         cxgbi_sock_skb_entail(csk, skb);
1866         spin_unlock_bh(&csk->lock);
1867
1868         return 0;
1869 }
1870
1871 static int ddp_set_map(struct cxgbi_ppm *ppm, struct cxgbi_sock *csk,
1872                        struct cxgbi_task_tag_info *ttinfo)
1873 {
1874         unsigned int pidx = ttinfo->idx;
1875         unsigned int npods = ttinfo->npods;
1876         unsigned int i, cnt;
1877         int err = 0;
1878         struct scatterlist *sg = ttinfo->sgl;
1879         unsigned int offset = 0;
1880
1881         ttinfo->cid = csk->port_id;
1882
1883         for (i = 0; i < npods; i += cnt, pidx += cnt) {
1884                 cnt = npods - i;
1885
1886                 if (cnt > ULPMEM_IDATA_MAX_NPPODS)
1887                         cnt = ULPMEM_IDATA_MAX_NPPODS;
1888                 err = ddp_ppod_write_idata(ppm, csk, ttinfo, pidx, cnt,
1889                                            &sg, &offset);
1890                 if (err < 0)
1891                         break;
1892         }
1893
1894         return err;
1895 }
1896
1897 static int ddp_setup_conn_pgidx(struct cxgbi_sock *csk, unsigned int tid,
1898                                 int pg_idx, bool reply)
1899 {
1900         struct sk_buff *skb;
1901         struct cpl_set_tcb_field *req;
1902
1903         if (!pg_idx || pg_idx >= DDP_PGIDX_MAX)
1904                 return 0;
1905
1906         skb = alloc_wr(sizeof(*req), 0, GFP_KERNEL);
1907         if (!skb)
1908                 return -ENOMEM;
1909
1910         /*  set up ulp page size */
1911         req = (struct cpl_set_tcb_field *)skb->head;
1912         INIT_TP_WR(req, csk->tid);
1913         OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, csk->tid));
1914         req->reply_ctrl = htons(NO_REPLY_V(reply) | QUEUENO_V(csk->rss_qid));
1915         req->word_cookie = htons(0);
1916         req->mask = cpu_to_be64(0x3 << 8);
1917         req->val = cpu_to_be64(pg_idx << 8);
1918         set_wr_txq(skb, CPL_PRIORITY_CONTROL, csk->port_id);
1919
1920         log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1921                 "csk 0x%p, tid 0x%x, pg_idx %u.\n", csk, csk->tid, pg_idx);
1922
1923         cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
1924         return 0;
1925 }
1926
1927 static int ddp_setup_conn_digest(struct cxgbi_sock *csk, unsigned int tid,
1928                                  int hcrc, int dcrc, int reply)
1929 {
1930         struct sk_buff *skb;
1931         struct cpl_set_tcb_field *req;
1932
1933         if (!hcrc && !dcrc)
1934                 return 0;
1935
1936         skb = alloc_wr(sizeof(*req), 0, GFP_KERNEL);
1937         if (!skb)
1938                 return -ENOMEM;
1939
1940         csk->hcrc_len = (hcrc ? 4 : 0);
1941         csk->dcrc_len = (dcrc ? 4 : 0);
1942         /*  set up ulp submode */
1943         req = (struct cpl_set_tcb_field *)skb->head;
1944         INIT_TP_WR(req, tid);
1945         OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, tid));
1946         req->reply_ctrl = htons(NO_REPLY_V(reply) | QUEUENO_V(csk->rss_qid));
1947         req->word_cookie = htons(0);
1948         req->mask = cpu_to_be64(0x3 << 4);
1949         req->val = cpu_to_be64(((hcrc ? ULP_CRC_HEADER : 0) |
1950                                 (dcrc ? ULP_CRC_DATA : 0)) << 4);
1951         set_wr_txq(skb, CPL_PRIORITY_CONTROL, csk->port_id);
1952
1953         log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1954                 "csk 0x%p, tid 0x%x, crc %d,%d.\n", csk, csk->tid, hcrc, dcrc);
1955
1956         cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
1957         return 0;
1958 }
1959
1960 static struct cxgbi_ppm *cdev2ppm(struct cxgbi_device *cdev)
1961 {
1962         return (struct cxgbi_ppm *)(*((struct cxgb4_lld_info *)
1963                                        (cxgbi_cdev_priv(cdev)))->iscsi_ppm);
1964 }
1965
1966 static int cxgb4i_ddp_init(struct cxgbi_device *cdev)
1967 {
1968         struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1969         struct net_device *ndev = cdev->ports[0];
1970         struct cxgbi_tag_format tformat;
1971         unsigned int ppmax;
1972         int i;
1973
1974         if (!lldi->vr->iscsi.size) {
1975                 pr_warn("%s, iscsi NOT enabled, check config!\n", ndev->name);
1976                 return -EACCES;
1977         }
1978
1979         cdev->flags |= CXGBI_FLAG_USE_PPOD_OFLDQ;
1980         ppmax = lldi->vr->iscsi.size >> PPOD_SIZE_SHIFT;
1981
1982         memset(&tformat, 0, sizeof(struct cxgbi_tag_format));
1983         for (i = 0; i < 4; i++)
1984                 tformat.pgsz_order[i] = (lldi->iscsi_pgsz_order >> (i << 3))
1985                                          & 0xF;
1986         cxgbi_tagmask_check(lldi->iscsi_tagmask, &tformat);
1987
1988         cxgbi_ddp_ppm_setup(lldi->iscsi_ppm, cdev, &tformat, ppmax,
1989                             lldi->iscsi_llimit, lldi->vr->iscsi.start, 2);
1990
1991         cdev->csk_ddp_setup_digest = ddp_setup_conn_digest;
1992         cdev->csk_ddp_setup_pgidx = ddp_setup_conn_pgidx;
1993         cdev->csk_ddp_set_map = ddp_set_map;
1994         cdev->tx_max_size = min_t(unsigned int, ULP2_MAX_PDU_PAYLOAD,
1995                                   lldi->iscsi_iolen - ISCSI_PDU_NONPAYLOAD_LEN);
1996         cdev->rx_max_size = min_t(unsigned int, ULP2_MAX_PDU_PAYLOAD,
1997                                   lldi->iscsi_iolen - ISCSI_PDU_NONPAYLOAD_LEN);
1998         cdev->cdev2ppm = cdev2ppm;
1999
2000         return 0;
2001 }
2002
2003 static void *t4_uld_add(const struct cxgb4_lld_info *lldi)
2004 {
2005         struct cxgbi_device *cdev;
2006         struct port_info *pi;
2007         int i, rc;
2008
2009         cdev = cxgbi_device_register(sizeof(*lldi), lldi->nports);
2010         if (!cdev) {
2011                 pr_info("t4 device 0x%p, register failed.\n", lldi);
2012                 return NULL;
2013         }
2014         pr_info("0x%p,0x%x, ports %u,%s, chan %u, q %u,%u, wr %u.\n",
2015                 cdev, lldi->adapter_type, lldi->nports,
2016                 lldi->ports[0]->name, lldi->nchan, lldi->ntxq,
2017                 lldi->nrxq, lldi->wr_cred);
2018         for (i = 0; i < lldi->nrxq; i++)
2019                 log_debug(1 << CXGBI_DBG_DEV,
2020                         "t4 0x%p, rxq id #%d: %u.\n",
2021                         cdev, i, lldi->rxq_ids[i]);
2022
2023         memcpy(cxgbi_cdev_priv(cdev), lldi, sizeof(*lldi));
2024         cdev->flags = CXGBI_FLAG_DEV_T4;
2025         cdev->pdev = lldi->pdev;
2026         cdev->ports = lldi->ports;
2027         cdev->nports = lldi->nports;
2028         cdev->mtus = lldi->mtus;
2029         cdev->nmtus = NMTUS;
2030         cdev->rx_credit_thres = (CHELSIO_CHIP_VERSION(lldi->adapter_type) <=
2031                                  CHELSIO_T5) ? cxgb4i_rx_credit_thres : 0;
2032         cdev->skb_tx_rsvd = CXGB4I_TX_HEADER_LEN;
2033         cdev->skb_rx_extra = sizeof(struct cpl_iscsi_hdr);
2034         cdev->itp = &cxgb4i_iscsi_transport;
2035         cdev->owner = THIS_MODULE;
2036
2037         cdev->pfvf = FW_VIID_PFN_G(cxgb4_port_viid(lldi->ports[0]))
2038                         << FW_VIID_PFN_S;
2039         pr_info("cdev 0x%p,%s, pfvf %u.\n",
2040                 cdev, lldi->ports[0]->name, cdev->pfvf);
2041
2042         rc = cxgb4i_ddp_init(cdev);
2043         if (rc) {
2044                 pr_info("t4 0x%p ddp init failed.\n", cdev);
2045                 goto err_out;
2046         }
2047         rc = cxgb4i_ofld_init(cdev);
2048         if (rc) {
2049                 pr_info("t4 0x%p ofld init failed.\n", cdev);
2050                 goto err_out;
2051         }
2052
2053         rc = cxgbi_hbas_add(cdev, CXGB4I_MAX_LUN, CXGBI_MAX_CONN,
2054                                 &cxgb4i_host_template, cxgb4i_stt);
2055         if (rc)
2056                 goto err_out;
2057
2058         for (i = 0; i < cdev->nports; i++) {
2059                 pi = netdev_priv(lldi->ports[i]);
2060                 cdev->hbas[i]->port_id = pi->port_id;
2061         }
2062         return cdev;
2063
2064 err_out:
2065         cxgbi_device_unregister(cdev);
2066         return ERR_PTR(-ENOMEM);
2067 }
2068
2069 #define RX_PULL_LEN     128
2070 static int t4_uld_rx_handler(void *handle, const __be64 *rsp,
2071                                 const struct pkt_gl *pgl)
2072 {
2073         const struct cpl_act_establish *rpl;
2074         struct sk_buff *skb;
2075         unsigned int opc;
2076         struct cxgbi_device *cdev = handle;
2077
2078         if (pgl == NULL) {
2079                 unsigned int len = 64 - sizeof(struct rsp_ctrl) - 8;
2080
2081                 skb = alloc_wr(len, 0, GFP_ATOMIC);
2082                 if (!skb)
2083                         goto nomem;
2084                 skb_copy_to_linear_data(skb, &rsp[1], len);
2085         } else {
2086                 if (unlikely(*(u8 *)rsp != *(u8 *)pgl->va)) {
2087                         pr_info("? FL 0x%p,RSS%#llx,FL %#llx,len %u.\n",
2088                                 pgl->va, be64_to_cpu(*rsp),
2089                                 be64_to_cpu(*(u64 *)pgl->va),
2090                                 pgl->tot_len);
2091                         return 0;
2092                 }
2093                 skb = cxgb4_pktgl_to_skb(pgl, RX_PULL_LEN, RX_PULL_LEN);
2094                 if (unlikely(!skb))
2095                         goto nomem;
2096         }
2097
2098         rpl = (struct cpl_act_establish *)skb->data;
2099         opc = rpl->ot.opcode;
2100         log_debug(1 << CXGBI_DBG_TOE,
2101                 "cdev %p, opcode 0x%x(0x%x,0x%x), skb %p.\n",
2102                  cdev, opc, rpl->ot.opcode_tid, ntohl(rpl->ot.opcode_tid), skb);
2103         if (cxgb4i_cplhandlers[opc])
2104                 cxgb4i_cplhandlers[opc](cdev, skb);
2105         else {
2106                 pr_err("No handler for opcode 0x%x.\n", opc);
2107                 __kfree_skb(skb);
2108         }
2109         return 0;
2110 nomem:
2111         log_debug(1 << CXGBI_DBG_TOE, "OOM bailing out.\n");
2112         return 1;
2113 }
2114
2115 static int t4_uld_state_change(void *handle, enum cxgb4_state state)
2116 {
2117         struct cxgbi_device *cdev = handle;
2118
2119         switch (state) {
2120         case CXGB4_STATE_UP:
2121                 pr_info("cdev 0x%p, UP.\n", cdev);
2122                 break;
2123         case CXGB4_STATE_START_RECOVERY:
2124                 pr_info("cdev 0x%p, RECOVERY.\n", cdev);
2125                 /* close all connections */
2126                 break;
2127         case CXGB4_STATE_DOWN:
2128                 pr_info("cdev 0x%p, DOWN.\n", cdev);
2129                 break;
2130         case CXGB4_STATE_DETACH:
2131                 pr_info("cdev 0x%p, DETACH.\n", cdev);
2132                 cxgbi_device_unregister(cdev);
2133                 break;
2134         default:
2135                 pr_info("cdev 0x%p, unknown state %d.\n", cdev, state);
2136                 break;
2137         }
2138         return 0;
2139 }
2140
2141 static int __init cxgb4i_init_module(void)
2142 {
2143         int rc;
2144
2145         printk(KERN_INFO "%s", version);
2146
2147         rc = cxgbi_iscsi_init(&cxgb4i_iscsi_transport, &cxgb4i_stt);
2148         if (rc < 0)
2149                 return rc;
2150         cxgb4_register_uld(CXGB4_ULD_ISCSI, &cxgb4i_uld_info);
2151
2152         return 0;
2153 }
2154
2155 static void __exit cxgb4i_exit_module(void)
2156 {
2157         cxgb4_unregister_uld(CXGB4_ULD_ISCSI);
2158         cxgbi_device_unregister_all(CXGBI_FLAG_DEV_T4);
2159         cxgbi_iscsi_cleanup(&cxgb4i_iscsi_transport, &cxgb4i_stt);
2160 }
2161
2162 module_init(cxgb4i_init_module);
2163 module_exit(cxgb4i_exit_module);