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/T5 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         .add = t4_uld_add,
  88         .rx_handler = t4_uld_rx_handler,
  89         .state_change = t4_uld_state_change,
  90 };
  91
  92 static struct scsi_host_template cxgb4i_host_template = {
  93         .module         = THIS_MODULE,
  94         .name           = DRV_MODULE_NAME,
  95         .proc_name      = DRV_MODULE_NAME,
  96         .can_queue      = CXGB4I_SCSI_HOST_QDEPTH,
  97         .queuecommand   = iscsi_queuecommand,
  98         .change_queue_depth = scsi_change_queue_depth,
  99         .sg_tablesize   = SG_ALL,
 100         .max_sectors    = 0xFFFF,
 101         .cmd_per_lun    = ISCSI_DEF_CMD_PER_LUN,
 102         .eh_abort_handler = iscsi_eh_abort,
 103         .eh_device_reset_handler = iscsi_eh_device_reset,
 104         .eh_target_reset_handler = iscsi_eh_recover_target,
 105         .target_alloc   = iscsi_target_alloc,
 106         .use_clustering = DISABLE_CLUSTERING,
 107         .this_id        = -1,
 108         .track_queue_depth = 1,
 109 };
 110
 111 static struct iscsi_transport cxgb4i_iscsi_transport = {
 112         .owner          = THIS_MODULE,
 113         .name           = DRV_MODULE_NAME,
 114         .caps           = CAP_RECOVERY_L0 | CAP_MULTI_R2T | CAP_HDRDGST |
 115                                 CAP_DATADGST | CAP_DIGEST_OFFLOAD |
 116                                 CAP_PADDING_OFFLOAD | CAP_TEXT_NEGO,
 117         .attr_is_visible        = cxgbi_attr_is_visible,
 118         .get_host_param = cxgbi_get_host_param,
 119         .set_host_param = cxgbi_set_host_param,
 120         /* session management */
 121         .create_session = cxgbi_create_session,
 122         .destroy_session        = cxgbi_destroy_session,
 123         .get_session_param = iscsi_session_get_param,
 124         /* connection management */
 125         .create_conn    = cxgbi_create_conn,
 126         .bind_conn              = cxgbi_bind_conn,
 127         .destroy_conn   = iscsi_tcp_conn_teardown,
 128         .start_conn             = iscsi_conn_start,
 129         .stop_conn              = iscsi_conn_stop,
 130         .get_conn_param = iscsi_conn_get_param,
 131         .set_param      = cxgbi_set_conn_param,
 132         .get_stats      = cxgbi_get_conn_stats,
 133         /* pdu xmit req from user space */
 134         .send_pdu       = iscsi_conn_send_pdu,
 135         /* task */
 136         .init_task      = iscsi_tcp_task_init,
 137         .xmit_task      = iscsi_tcp_task_xmit,
 138         .cleanup_task   = cxgbi_cleanup_task,
 139         /* pdu */
 140         .alloc_pdu      = cxgbi_conn_alloc_pdu,
 141         .init_pdu       = cxgbi_conn_init_pdu,
 142         .xmit_pdu       = cxgbi_conn_xmit_pdu,
 143         .parse_pdu_itt  = cxgbi_parse_pdu_itt,
 144         /* TCP connect/disconnect */
 145         .get_ep_param   = cxgbi_get_ep_param,
 146         .ep_connect     = cxgbi_ep_connect,
 147         .ep_poll        = cxgbi_ep_poll,
 148         .ep_disconnect  = cxgbi_ep_disconnect,
 149         /* Error recovery timeout call */
 150         .session_recovery_timedout = iscsi_session_recovery_timedout,
 151 };
 152
 153 static struct scsi_transport_template *cxgb4i_stt;
 154
 155 /*
 156  * CPL (Chelsio Protocol Language) defines a message passing interface between
 157  * the host driver and Chelsio asic.
 158  * The section below implments CPLs that related to iscsi tcp connection
 159  * open/close/abort and data send/receive.
 160  */
 161
 162 #define RCV_BUFSIZ_MASK         0x3FFU
 163 #define MAX_IMM_TX_PKT_LEN      256
 164
 165 static int push_tx_frames(struct cxgbi_sock *, int);
 166
 167 /*
 168  * is_ofld_imm - check whether a packet can be sent as immediate data
 169  * @skb: the packet
 170  *
 171  * Returns true if a packet can be sent as an offload WR with immediate
 172  * data.  We currently use the same limit as for Ethernet packets.
 173  */
 174 static inline bool is_ofld_imm(const struct sk_buff *skb)
 175 {
 176         int len = skb->len;
 177
 178         if (likely(cxgbi_skcb_test_flag(skb, SKCBF_TX_NEED_HDR)))
 179                 len += sizeof(struct fw_ofld_tx_data_wr);
 180
 181         return len <= MAX_IMM_TX_PKT_LEN;
 182 }
 183
 184 static void send_act_open_req(struct cxgbi_sock *csk, struct sk_buff *skb,
 185                                 struct l2t_entry *e)
 186 {
 187         struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev);
 188         int t4 = is_t4(lldi->adapter_type);
 189         int wscale = cxgbi_sock_compute_wscale(csk->mss_idx);
 190         unsigned long long opt0;
 191         unsigned int opt2;
 192         unsigned int qid_atid = ((unsigned int)csk->atid) |
 193                                  (((unsigned int)csk->rss_qid) << 14);
 194
 195         opt0 = KEEP_ALIVE_F |
 196                 WND_SCALE_V(wscale) |
 197                 MSS_IDX_V(csk->mss_idx) |
 198                 L2T_IDX_V(((struct l2t_entry *)csk->l2t)->idx) |
 199                 TX_CHAN_V(csk->tx_chan) |
 200                 SMAC_SEL_V(csk->smac_idx) |
 201                 ULP_MODE_V(ULP_MODE_ISCSI) |
 202                 RCV_BUFSIZ_V(csk->rcv_win >> 10);
 203
 204         opt2 = RX_CHANNEL_V(0) |
 205                 RSS_QUEUE_VALID_F |
 206                 RSS_QUEUE_V(csk->rss_qid);
 207
 208         if (is_t4(lldi->adapter_type)) {
 209                 struct cpl_act_open_req *req =
 210                                 (struct cpl_act_open_req *)skb->head;
 211
 212                 INIT_TP_WR(req, 0);
 213                 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ,
 214                                         qid_atid));
 215                 req->local_port = csk->saddr.sin_port;
 216                 req->peer_port = csk->daddr.sin_port;
 217                 req->local_ip = csk->saddr.sin_addr.s_addr;
 218                 req->peer_ip = csk->daddr.sin_addr.s_addr;
 219                 req->opt0 = cpu_to_be64(opt0);
 220                 req->params = cpu_to_be32(cxgb4_select_ntuple(
 221                                         csk->cdev->ports[csk->port_id],
 222                                         csk->l2t));
 223                 opt2 |= RX_FC_VALID_F;
 224                 req->opt2 = cpu_to_be32(opt2);
 225
 226                 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
 227                         "csk t4 0x%p, %pI4:%u-%pI4:%u, atid %d, qid %u.\n",
 228                         csk, &req->local_ip, ntohs(req->local_port),
 229                         &req->peer_ip, ntohs(req->peer_port),
 230                         csk->atid, csk->rss_qid);
 231         } else {
 232                 struct cpl_t5_act_open_req *req =
 233                                 (struct cpl_t5_act_open_req *)skb->head;
 234                 u32 isn = (prandom_u32() & ~7UL) - 1;
 235
 236                 INIT_TP_WR(req, 0);
 237                 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ,
 238                                         qid_atid));
 239                 req->local_port = csk->saddr.sin_port;
 240                 req->peer_port = csk->daddr.sin_port;
 241                 req->local_ip = csk->saddr.sin_addr.s_addr;
 242                 req->peer_ip = csk->daddr.sin_addr.s_addr;
 243                 req->opt0 = cpu_to_be64(opt0);
 244                 req->params = cpu_to_be64(FILTER_TUPLE_V(
 245                                 cxgb4_select_ntuple(
 246                                         csk->cdev->ports[csk->port_id],
 247                                         csk->l2t)));
 248                 req->rsvd = cpu_to_be32(isn);
 249                 opt2 |= T5_ISS_VALID;
 250                 opt2 |= T5_OPT_2_VALID_F;
 251
 252                 req->opt2 = cpu_to_be32(opt2);
 253
 254                 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
 255                         "csk t5 0x%p, %pI4:%u-%pI4:%u, atid %d, qid %u.\n",
 256                         csk, &req->local_ip, ntohs(req->local_port),
 257                         &req->peer_ip, ntohs(req->peer_port),
 258                         csk->atid, csk->rss_qid);
 259         }
 260
 261         set_wr_txq(skb, CPL_PRIORITY_SETUP, csk->port_id);
 262
 263         pr_info_ipaddr("t%d csk 0x%p,%u,0x%lx,%u, rss_qid %u.\n",
 264                        (&csk->saddr), (&csk->daddr), t4 ? 4 : 5, csk,
 265                        csk->state, csk->flags, csk->atid, csk->rss_qid);
 266
 267         cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t);
 268 }
 269
 270 #if IS_ENABLED(CONFIG_IPV6)
 271 static void send_act_open_req6(struct cxgbi_sock *csk, struct sk_buff *skb,
 272                                struct l2t_entry *e)
 273 {
 274         struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev);
 275         int t4 = is_t4(lldi->adapter_type);
 276         int wscale = cxgbi_sock_compute_wscale(csk->mss_idx);
 277         unsigned long long opt0;
 278         unsigned int opt2;
 279         unsigned int qid_atid = ((unsigned int)csk->atid) |
 280                                  (((unsigned int)csk->rss_qid) << 14);
 281
 282         opt0 = KEEP_ALIVE_F |
 283                 WND_SCALE_V(wscale) |
 284                 MSS_IDX_V(csk->mss_idx) |
 285                 L2T_IDX_V(((struct l2t_entry *)csk->l2t)->idx) |
 286                 TX_CHAN_V(csk->tx_chan) |
 287                 SMAC_SEL_V(csk->smac_idx) |
 288                 ULP_MODE_V(ULP_MODE_ISCSI) |
 289                 RCV_BUFSIZ_V(csk->rcv_win >> 10);
 290
 291         opt2 = RX_CHANNEL_V(0) |
 292                 RSS_QUEUE_VALID_F |
 293                 RX_FC_DISABLE_F |
 294                 RSS_QUEUE_V(csk->rss_qid);
 295
 296         if (t4) {
 297                 struct cpl_act_open_req6 *req =
 298                             (struct cpl_act_open_req6 *)skb->head;
 299
 300                 INIT_TP_WR(req, 0);
 301                 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ6,
 302                                                             qid_atid));
 303                 req->local_port = csk->saddr6.sin6_port;
 304                 req->peer_port = csk->daddr6.sin6_port;
 305
 306                 req->local_ip_hi = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr);
 307                 req->local_ip_lo = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr +
 308                                                                     8);
 309                 req->peer_ip_hi = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr);
 310                 req->peer_ip_lo = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr +
 311                                                                     8);
 312
 313                 req->opt0 = cpu_to_be64(opt0);
 314
 315                 opt2 |= RX_FC_VALID_F;
 316                 req->opt2 = cpu_to_be32(opt2);
 317
 318                 req->params = cpu_to_be32(cxgb4_select_ntuple(
 319                                           csk->cdev->ports[csk->port_id],
 320                                           csk->l2t));
 321         } else {
 322                 struct cpl_t5_act_open_req6 *req =
 323                                 (struct cpl_t5_act_open_req6 *)skb->head;
 324
 325                 INIT_TP_WR(req, 0);
 326                 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ6,
 327                                                             qid_atid));
 328                 req->local_port = csk->saddr6.sin6_port;
 329                 req->peer_port = csk->daddr6.sin6_port;
 330                 req->local_ip_hi = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr);
 331                 req->local_ip_lo = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr +
 332                                                                         8);
 333                 req->peer_ip_hi = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr);
 334                 req->peer_ip_lo = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr +
 335                                                                         8);
 336                 req->opt0 = cpu_to_be64(opt0);
 337
 338                 opt2 |= T5_OPT_2_VALID_F;
 339                 req->opt2 = cpu_to_be32(opt2);
 340
 341                 req->params = cpu_to_be64(FILTER_TUPLE_V(cxgb4_select_ntuple(
 342                                           csk->cdev->ports[csk->port_id],
 343                                           csk->l2t)));
 344         }
 345
 346         set_wr_txq(skb, CPL_PRIORITY_SETUP, csk->port_id);
 347
 348         pr_info("t%d csk 0x%p,%u,0x%lx,%u, [%pI6]:%u-[%pI6]:%u, rss_qid %u.\n",
 349                 t4 ? 4 : 5, csk, csk->state, csk->flags, csk->atid,
 350                 &csk->saddr6.sin6_addr, ntohs(csk->saddr.sin_port),
 351                 &csk->daddr6.sin6_addr, ntohs(csk->daddr.sin_port),
 352                 csk->rss_qid);
 353
 354         cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t);
 355 }
 356 #endif
 357
 358 static void send_close_req(struct cxgbi_sock *csk)
 359 {
 360         struct sk_buff *skb = csk->cpl_close;
 361         struct cpl_close_con_req *req = (struct cpl_close_con_req *)skb->head;
 362         unsigned int tid = csk->tid;
 363
 364         log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
 365                 "csk 0x%p,%u,0x%lx, tid %u.\n",
 366                 csk, csk->state, csk->flags, csk->tid);
 367         csk->cpl_close = NULL;
 368         set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id);
 369         INIT_TP_WR(req, tid);
 370         OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_CLOSE_CON_REQ, tid));
 371         req->rsvd = 0;
 372
 373         cxgbi_sock_skb_entail(csk, skb);
 374         if (csk->state >= CTP_ESTABLISHED)
 375                 push_tx_frames(csk, 1);
 376 }
 377
 378 static void abort_arp_failure(void *handle, struct sk_buff *skb)
 379 {
 380         struct cxgbi_sock *csk = (struct cxgbi_sock *)handle;
 381         struct cpl_abort_req *req;
 382
 383         log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
 384                 "csk 0x%p,%u,0x%lx, tid %u, abort.\n",
 385                 csk, csk->state, csk->flags, csk->tid);
 386         req = (struct cpl_abort_req *)skb->data;
 387         req->cmd = CPL_ABORT_NO_RST;
 388         cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
 389 }
 390
 391 static void send_abort_req(struct cxgbi_sock *csk)
 392 {
 393         struct cpl_abort_req *req;
 394         struct sk_buff *skb = csk->cpl_abort_req;
 395
 396         if (unlikely(csk->state == CTP_ABORTING) || !skb || !csk->cdev)
 397                 return;
 398
 399         if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT)) {
 400                 send_tx_flowc_wr(csk);
 401                 cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT);
 402         }
 403
 404         cxgbi_sock_set_state(csk, CTP_ABORTING);
 405         cxgbi_sock_set_flag(csk, CTPF_ABORT_RPL_PENDING);
 406         cxgbi_sock_purge_write_queue(csk);
 407
 408         csk->cpl_abort_req = NULL;
 409         req = (struct cpl_abort_req *)skb->head;
 410         set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id);
 411         req->cmd = CPL_ABORT_SEND_RST;
 412         t4_set_arp_err_handler(skb, csk, abort_arp_failure);
 413         INIT_TP_WR(req, csk->tid);
 414         OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_REQ, csk->tid));
 415         req->rsvd0 = htonl(csk->snd_nxt);
 416         req->rsvd1 = !cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT);
 417
 418         log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
 419                 "csk 0x%p,%u,0x%lx,%u, snd_nxt %u, 0x%x.\n",
 420                 csk, csk->state, csk->flags, csk->tid, csk->snd_nxt,
 421                 req->rsvd1);
 422
 423         cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t);
 424 }
 425
 426 static void send_abort_rpl(struct cxgbi_sock *csk, int rst_status)
 427 {
 428         struct sk_buff *skb = csk->cpl_abort_rpl;
 429         struct cpl_abort_rpl *rpl = (struct cpl_abort_rpl *)skb->head;
 430
 431         log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
 432                 "csk 0x%p,%u,0x%lx,%u, status %d.\n",
 433                 csk, csk->state, csk->flags, csk->tid, rst_status);
 434
 435         csk->cpl_abort_rpl = NULL;
 436         set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id);
 437         INIT_TP_WR(rpl, csk->tid);
 438         OPCODE_TID(rpl) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_RPL, csk->tid));
 439         rpl->cmd = rst_status;
 440         cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
 441 }
 442
 443 /*
 444  * CPL connection rx data ack: host ->
 445  * Send RX credits through an RX_DATA_ACK CPL message. Returns the number of
 446  * credits sent.
 447  */
 448 static u32 send_rx_credits(struct cxgbi_sock *csk, u32 credits)
 449 {
 450         struct sk_buff *skb;
 451         struct cpl_rx_data_ack *req;
 452
 453         log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
 454                 "csk 0x%p,%u,0x%lx,%u, credit %u.\n",
 455                 csk, csk->state, csk->flags, csk->tid, credits);
 456
 457         skb = alloc_wr(sizeof(*req), 0, GFP_ATOMIC);
 458         if (!skb) {
 459                 pr_info("csk 0x%p, credit %u, OOM.\n", csk, credits);
 460                 return 0;
 461         }
 462         req = (struct cpl_rx_data_ack *)skb->head;
 463
 464         set_wr_txq(skb, CPL_PRIORITY_ACK, csk->port_id);
 465         INIT_TP_WR(req, csk->tid);
 466         OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_RX_DATA_ACK,
 467                                       csk->tid));
 468         req->credit_dack = cpu_to_be32(RX_CREDITS_V(credits)
 469                                        | RX_FORCE_ACK_F);
 470         cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
 471         return credits;
 472 }
 473
 474 /*
 475  * sgl_len - calculates the size of an SGL of the given capacity
 476  * @n: the number of SGL entries
 477  * Calculates the number of flits needed for a scatter/gather list that
 478  * can hold the given number of entries.
 479  */
 480 static inline unsigned int sgl_len(unsigned int n)
 481 {
 482         n--;
 483         return (3 * n) / 2 + (n & 1) + 2;
 484 }
 485
 486 /*
 487  * calc_tx_flits_ofld - calculate # of flits for an offload packet
 488  * @skb: the packet
 489  *
 490  * Returns the number of flits needed for the given offload packet.
 491  * These packets are already fully constructed and no additional headers
 492  * will be added.
 493  */
 494 static inline unsigned int calc_tx_flits_ofld(const struct sk_buff *skb)
 495 {
 496         unsigned int flits, cnt;
 497
 498         if (is_ofld_imm(skb))
 499                 return DIV_ROUND_UP(skb->len, 8);
 500         flits = skb_transport_offset(skb) / 8;
 501         cnt = skb_shinfo(skb)->nr_frags;
 502         if (skb_tail_pointer(skb) != skb_transport_header(skb))
 503                 cnt++;
 504         return flits + sgl_len(cnt);
 505 }
 506
 507 #define FLOWC_WR_NPARAMS_MIN    9
 508 static inline int tx_flowc_wr_credits(int *nparamsp, int *flowclenp)
 509 {
 510         int nparams, flowclen16, flowclen;
 511
 512         nparams = FLOWC_WR_NPARAMS_MIN;
 513         flowclen = offsetof(struct fw_flowc_wr, mnemval[nparams]);
 514         flowclen16 = DIV_ROUND_UP(flowclen, 16);
 515         flowclen = flowclen16 * 16;
 516         /*
 517          * Return the number of 16-byte credits used by the FlowC request.
 518          * Pass back the nparams and actual FlowC length if requested.
 519          */
 520         if (nparamsp)
 521                 *nparamsp = nparams;
 522         if (flowclenp)
 523                 *flowclenp = flowclen;
 524
 525         return flowclen16;
 526 }
 527
 528 static inline int send_tx_flowc_wr(struct cxgbi_sock *csk)
 529 {
 530         struct sk_buff *skb;
 531         struct fw_flowc_wr *flowc;
 532         int nparams, flowclen16, flowclen;
 533
 534         flowclen16 = tx_flowc_wr_credits(&nparams, &flowclen);
 535         skb = alloc_wr(flowclen, 0, GFP_ATOMIC);
 536         flowc = (struct fw_flowc_wr *)skb->head;
 537         flowc->op_to_nparams =
 538                 htonl(FW_WR_OP_V(FW_FLOWC_WR) | FW_FLOWC_WR_NPARAMS_V(nparams));
 539         flowc->flowid_len16 =
 540                 htonl(FW_WR_LEN16_V(flowclen16) | FW_WR_FLOWID_V(csk->tid));
 541         flowc->mnemval[0].mnemonic = FW_FLOWC_MNEM_PFNVFN;
 542         flowc->mnemval[0].val = htonl(csk->cdev->pfvf);
 543         flowc->mnemval[1].mnemonic = FW_FLOWC_MNEM_CH;
 544         flowc->mnemval[1].val = htonl(csk->tx_chan);
 545         flowc->mnemval[2].mnemonic = FW_FLOWC_MNEM_PORT;
 546         flowc->mnemval[2].val = htonl(csk->tx_chan);
 547         flowc->mnemval[3].mnemonic = FW_FLOWC_MNEM_IQID;
 548         flowc->mnemval[3].val = htonl(csk->rss_qid);
 549         flowc->mnemval[4].mnemonic = FW_FLOWC_MNEM_SNDNXT;
 550         flowc->mnemval[4].val = htonl(csk->snd_nxt);
 551         flowc->mnemval[5].mnemonic = FW_FLOWC_MNEM_RCVNXT;
 552         flowc->mnemval[5].val = htonl(csk->rcv_nxt);
 553         flowc->mnemval[6].mnemonic = FW_FLOWC_MNEM_SNDBUF;
 554         flowc->mnemval[6].val = htonl(csk->snd_win);
 555         flowc->mnemval[7].mnemonic = FW_FLOWC_MNEM_MSS;
 556         flowc->mnemval[7].val = htonl(csk->advmss);
 557         flowc->mnemval[8].mnemonic = 0;
 558         flowc->mnemval[8].val = 0;
 559         flowc->mnemval[8].mnemonic = FW_FLOWC_MNEM_TXDATAPLEN_MAX;
 560         flowc->mnemval[8].val = 16384;
 561
 562         set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id);
 563
 564         log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
 565                 "csk 0x%p, tid 0x%x, %u,%u,%u,%u,%u,%u,%u.\n",
 566                 csk, csk->tid, 0, csk->tx_chan, csk->rss_qid,
 567                 csk->snd_nxt, csk->rcv_nxt, csk->snd_win,
 568                 csk->advmss);
 569
 570         cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
 571
 572         return flowclen16;
 573 }
 574
 575 static inline void make_tx_data_wr(struct cxgbi_sock *csk, struct sk_buff *skb,
 576                                    int dlen, int len, u32 credits, int compl)
 577 {
 578         struct fw_ofld_tx_data_wr *req;
 579         unsigned int submode = cxgbi_skcb_ulp_mode(skb) & 3;
 580         unsigned int wr_ulp_mode = 0, val;
 581         bool imm = is_ofld_imm(skb);
 582
 583         req = (struct fw_ofld_tx_data_wr *)__skb_push(skb, sizeof(*req));
 584
 585         if (imm) {
 586                 req->op_to_immdlen = htonl(FW_WR_OP_V(FW_OFLD_TX_DATA_WR) |
 587                                         FW_WR_COMPL_F |
 588                                         FW_WR_IMMDLEN_V(dlen));
 589                 req->flowid_len16 = htonl(FW_WR_FLOWID_V(csk->tid) |
 590                                                 FW_WR_LEN16_V(credits));
 591         } else {
 592                 req->op_to_immdlen =
 593                         cpu_to_be32(FW_WR_OP_V(FW_OFLD_TX_DATA_WR) |
 594                                         FW_WR_COMPL_F |
 595                                         FW_WR_IMMDLEN_V(0));
 596                 req->flowid_len16 =
 597                         cpu_to_be32(FW_WR_FLOWID_V(csk->tid) |
 598                                         FW_WR_LEN16_V(credits));
 599         }
 600         if (submode)
 601                 wr_ulp_mode = FW_OFLD_TX_DATA_WR_ULPMODE_V(ULP2_MODE_ISCSI) |
 602                                 FW_OFLD_TX_DATA_WR_ULPSUBMODE_V(submode);
 603         val = skb_peek(&csk->write_queue) ? 0 : 1;
 604         req->tunnel_to_proxy = htonl(wr_ulp_mode |
 605                                      FW_OFLD_TX_DATA_WR_SHOVE_V(val));
 606         req->plen = htonl(len);
 607         if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT))
 608                 cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT);
 609 }
 610
 611 static void arp_failure_skb_discard(void *handle, struct sk_buff *skb)
 612 {
 613         kfree_skb(skb);
 614 }
 615
 616 static int push_tx_frames(struct cxgbi_sock *csk, int req_completion)
 617 {
 618         int total_size = 0;
 619         struct sk_buff *skb;
 620
 621         if (unlikely(csk->state < CTP_ESTABLISHED ||
 622                 csk->state == CTP_CLOSE_WAIT_1 || csk->state >= CTP_ABORTING)) {
 623                 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK |
 624                          1 << CXGBI_DBG_PDU_TX,
 625                         "csk 0x%p,%u,0x%lx,%u, in closing state.\n",
 626                         csk, csk->state, csk->flags, csk->tid);
 627                 return 0;
 628         }
 629
 630         while (csk->wr_cred && (skb = skb_peek(&csk->write_queue)) != NULL) {
 631                 int dlen = skb->len;
 632                 int len = skb->len;
 633                 unsigned int credits_needed;
 634                 int flowclen16 = 0;
 635
 636                 skb_reset_transport_header(skb);
 637                 if (is_ofld_imm(skb))
 638                         credits_needed = DIV_ROUND_UP(dlen, 16);
 639                 else
 640                         credits_needed = DIV_ROUND_UP(
 641                                                 8 * calc_tx_flits_ofld(skb),
 642                                                 16);
 643
 644                 if (likely(cxgbi_skcb_test_flag(skb, SKCBF_TX_NEED_HDR)))
 645                         credits_needed += DIV_ROUND_UP(
 646                                         sizeof(struct fw_ofld_tx_data_wr),
 647                                         16);
 648
 649                 /*
 650                  * Assumes the initial credits is large enough to support
 651                  * fw_flowc_wr plus largest possible first payload
 652                  */
 653                 if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT)) {
 654                         flowclen16 = send_tx_flowc_wr(csk);
 655                         csk->wr_cred -= flowclen16;
 656                         csk->wr_una_cred += flowclen16;
 657                         cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT);
 658                 }
 659
 660                 if (csk->wr_cred < credits_needed) {
 661                         log_debug(1 << CXGBI_DBG_PDU_TX,
 662                                 "csk 0x%p, skb %u/%u, wr %d < %u.\n",
 663                                 csk, skb->len, skb->data_len,
 664                                 credits_needed, csk->wr_cred);
 665                         break;
 666                 }
 667                 __skb_unlink(skb, &csk->write_queue);
 668                 set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id);
 669                 skb->csum = credits_needed + flowclen16;
 670                 csk->wr_cred -= credits_needed;
 671                 csk->wr_una_cred += credits_needed;
 672                 cxgbi_sock_enqueue_wr(csk, skb);
 673
 674                 log_debug(1 << CXGBI_DBG_PDU_TX,
 675                         "csk 0x%p, skb %u/%u, wr %d, left %u, unack %u.\n",
 676                         csk, skb->len, skb->data_len, credits_needed,
 677                         csk->wr_cred, csk->wr_una_cred);
 678
 679                 if (likely(cxgbi_skcb_test_flag(skb, SKCBF_TX_NEED_HDR))) {
 680                         len += cxgbi_ulp_extra_len(cxgbi_skcb_ulp_mode(skb));
 681                         make_tx_data_wr(csk, skb, dlen, len, credits_needed,
 682                                         req_completion);
 683                         csk->snd_nxt += len;
 684                         cxgbi_skcb_clear_flag(skb, SKCBF_TX_NEED_HDR);
 685                 }
 686                 total_size += skb->truesize;
 687                 t4_set_arp_err_handler(skb, csk, arp_failure_skb_discard);
 688
 689                 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_TX,
 690                         "csk 0x%p,%u,0x%lx,%u, skb 0x%p, %u.\n",
 691                         csk, csk->state, csk->flags, csk->tid, skb, len);
 692
 693                 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t);
 694         }
 695         return total_size;
 696 }
 697
 698 static inline void free_atid(struct cxgbi_sock *csk)
 699 {
 700         struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev);
 701
 702         if (cxgbi_sock_flag(csk, CTPF_HAS_ATID)) {
 703                 cxgb4_free_atid(lldi->tids, csk->atid);
 704                 cxgbi_sock_clear_flag(csk, CTPF_HAS_ATID);
 705                 cxgbi_sock_put(csk);
 706         }
 707 }
 708
 709 static void do_act_establish(struct cxgbi_device *cdev, struct sk_buff *skb)
 710 {
 711         struct cxgbi_sock *csk;
 712         struct cpl_act_establish *req = (struct cpl_act_establish *)skb->data;
 713         unsigned short tcp_opt = ntohs(req->tcp_opt);
 714         unsigned int tid = GET_TID(req);
 715         unsigned int atid = TID_TID_G(ntohl(req->tos_atid));
 716         struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
 717         struct tid_info *t = lldi->tids;
 718         u32 rcv_isn = be32_to_cpu(req->rcv_isn);
 719
 720         csk = lookup_atid(t, atid);
 721         if (unlikely(!csk)) {
 722                 pr_err("NO conn. for atid %u, cdev 0x%p.\n", atid, cdev);
 723                 goto rel_skb;
 724         }
 725
 726         if (csk->atid != atid) {
 727                 pr_err("bad conn atid %u, csk 0x%p,%u,0x%lx,tid %u, atid %u.\n",
 728                         atid, csk, csk->state, csk->flags, csk->tid, csk->atid);
 729                 goto rel_skb;
 730         }
 731
 732         pr_info_ipaddr("atid 0x%x, tid 0x%x, csk 0x%p,%u,0x%lx, isn %u.\n",
 733                        (&csk->saddr), (&csk->daddr),
 734                        atid, tid, csk, csk->state, csk->flags, rcv_isn);
 735
 736         module_put(THIS_MODULE);
 737
 738         cxgbi_sock_get(csk);
 739         csk->tid = tid;
 740         cxgb4_insert_tid(lldi->tids, csk, tid);
 741         cxgbi_sock_set_flag(csk, CTPF_HAS_TID);
 742
 743         free_atid(csk);
 744
 745         spin_lock_bh(&csk->lock);
 746         if (unlikely(csk->state != CTP_ACTIVE_OPEN))
 747                 pr_info("csk 0x%p,%u,0x%lx,%u, got EST.\n",
 748                         csk, csk->state, csk->flags, csk->tid);
 749
 750         if (csk->retry_timer.function) {
 751                 del_timer(&csk->retry_timer);
 752                 csk->retry_timer.function = NULL;
 753         }
 754
 755         csk->copied_seq = csk->rcv_wup = csk->rcv_nxt = rcv_isn;
 756         /*
 757          * Causes the first RX_DATA_ACK to supply any Rx credits we couldn't
 758          * pass through opt0.
 759          */
 760         if (csk->rcv_win > (RCV_BUFSIZ_MASK << 10))
 761                 csk->rcv_wup -= csk->rcv_win - (RCV_BUFSIZ_MASK << 10);
 762
 763         csk->advmss = lldi->mtus[TCPOPT_MSS_G(tcp_opt)] - 40;
 764         if (TCPOPT_TSTAMP_G(tcp_opt))
 765                 csk->advmss -= 12;
 766         if (csk->advmss < 128)
 767                 csk->advmss = 128;
 768
 769         log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
 770                 "csk 0x%p, mss_idx %u, advmss %u.\n",
 771                         csk, TCPOPT_MSS_G(tcp_opt), csk->advmss);
 772
 773         cxgbi_sock_established(csk, ntohl(req->snd_isn), ntohs(req->tcp_opt));
 774
 775         if (unlikely(cxgbi_sock_flag(csk, CTPF_ACTIVE_CLOSE_NEEDED)))
 776                 send_abort_req(csk);
 777         else {
 778                 if (skb_queue_len(&csk->write_queue))
 779                         push_tx_frames(csk, 0);
 780                 cxgbi_conn_tx_open(csk);
 781         }
 782         spin_unlock_bh(&csk->lock);
 783
 784 rel_skb:
 785         __kfree_skb(skb);
 786 }
 787
 788 static int act_open_rpl_status_to_errno(int status)
 789 {
 790         switch (status) {
 791         case CPL_ERR_CONN_RESET:
 792                 return -ECONNREFUSED;
 793         case CPL_ERR_ARP_MISS:
 794                 return -EHOSTUNREACH;
 795         case CPL_ERR_CONN_TIMEDOUT:
 796                 return -ETIMEDOUT;
 797         case CPL_ERR_TCAM_FULL:
 798                 return -ENOMEM;
 799         case CPL_ERR_CONN_EXIST:
 800                 return -EADDRINUSE;
 801         default:
 802                 return -EIO;
 803         }
 804 }
 805
 806 static void csk_act_open_retry_timer(unsigned long data)
 807 {
 808         struct sk_buff *skb = NULL;
 809         struct cxgbi_sock *csk = (struct cxgbi_sock *)data;
 810         struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev);
 811         void (*send_act_open_func)(struct cxgbi_sock *, struct sk_buff *,
 812                                    struct l2t_entry *);
 813         int t4 = is_t4(lldi->adapter_type), size, size6;
 814
 815         log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
 816                 "csk 0x%p,%u,0x%lx,%u.\n",
 817                 csk, csk->state, csk->flags, csk->tid);
 818
 819         cxgbi_sock_get(csk);
 820         spin_lock_bh(&csk->lock);
 821
 822         if (t4) {
 823                 size = sizeof(struct cpl_act_open_req);
 824                 size6 = sizeof(struct cpl_act_open_req6);
 825         } else {
 826                 size = sizeof(struct cpl_t5_act_open_req);
 827                 size6 = sizeof(struct cpl_t5_act_open_req6);
 828         }
 829
 830         if (csk->csk_family == AF_INET) {
 831                 send_act_open_func = send_act_open_req;
 832                 skb = alloc_wr(size, 0, GFP_ATOMIC);
 833 #if IS_ENABLED(CONFIG_IPV6)
 834         } else {
 835                 send_act_open_func = send_act_open_req6;
 836                 skb = alloc_wr(size6, 0, GFP_ATOMIC);
 837 #endif
 838         }
 839
 840         if (!skb)
 841                 cxgbi_sock_fail_act_open(csk, -ENOMEM);
 842         else {
 843                 skb->sk = (struct sock *)csk;
 844                 t4_set_arp_err_handler(skb, csk,
 845                                        cxgbi_sock_act_open_req_arp_failure);
 846                 send_act_open_func(csk, skb, csk->l2t);
 847         }
 848
 849         spin_unlock_bh(&csk->lock);
 850         cxgbi_sock_put(csk);
 851
 852 }
 853
 854 static inline bool is_neg_adv(unsigned int status)
 855 {
 856         return status == CPL_ERR_RTX_NEG_ADVICE ||
 857                 status == CPL_ERR_KEEPALV_NEG_ADVICE ||
 858                 status == CPL_ERR_PERSIST_NEG_ADVICE;
 859 }
 860
 861 static void do_act_open_rpl(struct cxgbi_device *cdev, struct sk_buff *skb)
 862 {
 863         struct cxgbi_sock *csk;
 864         struct cpl_act_open_rpl *rpl = (struct cpl_act_open_rpl *)skb->data;
 865         unsigned int tid = GET_TID(rpl);
 866         unsigned int atid =
 867                 TID_TID_G(AOPEN_ATID_G(be32_to_cpu(rpl->atid_status)));
 868         unsigned int status = AOPEN_STATUS_G(be32_to_cpu(rpl->atid_status));
 869         struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
 870         struct tid_info *t = lldi->tids;
 871
 872         csk = lookup_atid(t, atid);
 873         if (unlikely(!csk)) {
 874                 pr_err("NO matching conn. atid %u, tid %u.\n", atid, tid);
 875                 goto rel_skb;
 876         }
 877
 878         pr_info_ipaddr("tid %u/%u, status %u.\n"
 879                        "csk 0x%p,%u,0x%lx. ", (&csk->saddr), (&csk->daddr),
 880                        atid, tid, status, csk, csk->state, csk->flags);
 881
 882         if (is_neg_adv(status))
 883                 goto rel_skb;
 884
 885         module_put(THIS_MODULE);
 886
 887         if (status && status != CPL_ERR_TCAM_FULL &&
 888             status != CPL_ERR_CONN_EXIST &&
 889             status != CPL_ERR_ARP_MISS)
 890                 cxgb4_remove_tid(lldi->tids, csk->port_id, GET_TID(rpl));
 891
 892         cxgbi_sock_get(csk);
 893         spin_lock_bh(&csk->lock);
 894
 895         if (status == CPL_ERR_CONN_EXIST &&
 896             csk->retry_timer.function != csk_act_open_retry_timer) {
 897                 csk->retry_timer.function = csk_act_open_retry_timer;
 898                 mod_timer(&csk->retry_timer, jiffies + HZ / 2);
 899         } else
 900                 cxgbi_sock_fail_act_open(csk,
 901                                         act_open_rpl_status_to_errno(status));
 902
 903         spin_unlock_bh(&csk->lock);
 904         cxgbi_sock_put(csk);
 905 rel_skb:
 906         __kfree_skb(skb);
 907 }
 908
 909 static void do_peer_close(struct cxgbi_device *cdev, struct sk_buff *skb)
 910 {
 911         struct cxgbi_sock *csk;
 912         struct cpl_peer_close *req = (struct cpl_peer_close *)skb->data;
 913         unsigned int tid = GET_TID(req);
 914         struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
 915         struct tid_info *t = lldi->tids;
 916
 917         csk = lookup_tid(t, tid);
 918         if (unlikely(!csk)) {
 919                 pr_err("can't find connection for tid %u.\n", tid);
 920                 goto rel_skb;
 921         }
 922         pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u.\n",
 923                        (&csk->saddr), (&csk->daddr),
 924                        csk, csk->state, csk->flags, csk->tid);
 925         cxgbi_sock_rcv_peer_close(csk);
 926 rel_skb:
 927         __kfree_skb(skb);
 928 }
 929
 930 static void do_close_con_rpl(struct cxgbi_device *cdev, struct sk_buff *skb)
 931 {
 932         struct cxgbi_sock *csk;
 933         struct cpl_close_con_rpl *rpl = (struct cpl_close_con_rpl *)skb->data;
 934         unsigned int tid = GET_TID(rpl);
 935         struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
 936         struct tid_info *t = lldi->tids;
 937
 938         csk = lookup_tid(t, tid);
 939         if (unlikely(!csk)) {
 940                 pr_err("can't find connection for tid %u.\n", tid);
 941                 goto rel_skb;
 942         }
 943         pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u.\n",
 944                        (&csk->saddr), (&csk->daddr),
 945                        csk, csk->state, csk->flags, csk->tid);
 946         cxgbi_sock_rcv_close_conn_rpl(csk, ntohl(rpl->snd_nxt));
 947 rel_skb:
 948         __kfree_skb(skb);
 949 }
 950
 951 static int abort_status_to_errno(struct cxgbi_sock *csk, int abort_reason,
 952                                                                 int *need_rst)
 953 {
 954         switch (abort_reason) {
 955         case CPL_ERR_BAD_SYN: /* fall through */
 956         case CPL_ERR_CONN_RESET:
 957                 return csk->state > CTP_ESTABLISHED ?
 958                         -EPIPE : -ECONNRESET;
 959         case CPL_ERR_XMIT_TIMEDOUT:
 960         case CPL_ERR_PERSIST_TIMEDOUT:
 961         case CPL_ERR_FINWAIT2_TIMEDOUT:
 962         case CPL_ERR_KEEPALIVE_TIMEDOUT:
 963                 return -ETIMEDOUT;
 964         default:
 965                 return -EIO;
 966         }
 967 }
 968
 969 static void do_abort_req_rss(struct cxgbi_device *cdev, struct sk_buff *skb)
 970 {
 971         struct cxgbi_sock *csk;
 972         struct cpl_abort_req_rss *req = (struct cpl_abort_req_rss *)skb->data;
 973         unsigned int tid = GET_TID(req);
 974         struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
 975         struct tid_info *t = lldi->tids;
 976         int rst_status = CPL_ABORT_NO_RST;
 977
 978         csk = lookup_tid(t, tid);
 979         if (unlikely(!csk)) {
 980                 pr_err("can't find connection for tid %u.\n", tid);
 981                 goto rel_skb;
 982         }
 983
 984         pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u, status %u.\n",
 985                        (&csk->saddr), (&csk->daddr),
 986                        csk, csk->state, csk->flags, csk->tid, req->status);
 987
 988         if (is_neg_adv(req->status))
 989                 goto rel_skb;
 990
 991         cxgbi_sock_get(csk);
 992         spin_lock_bh(&csk->lock);
 993
 994         cxgbi_sock_clear_flag(csk, CTPF_ABORT_REQ_RCVD);
 995
 996         if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT)) {
 997                 send_tx_flowc_wr(csk);
 998                 cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT);
 999         }
1000
1001         cxgbi_sock_set_flag(csk, CTPF_ABORT_REQ_RCVD);
1002         cxgbi_sock_set_state(csk, CTP_ABORTING);
1003
1004         send_abort_rpl(csk, rst_status);
1005
1006         if (!cxgbi_sock_flag(csk, CTPF_ABORT_RPL_PENDING)) {
1007                 csk->err = abort_status_to_errno(csk, req->status, &rst_status);
1008                 cxgbi_sock_closed(csk);
1009         }
1010
1011         spin_unlock_bh(&csk->lock);
1012         cxgbi_sock_put(csk);
1013 rel_skb:
1014         __kfree_skb(skb);
1015 }
1016
1017 static void do_abort_rpl_rss(struct cxgbi_device *cdev, struct sk_buff *skb)
1018 {
1019         struct cxgbi_sock *csk;
1020         struct cpl_abort_rpl_rss *rpl = (struct cpl_abort_rpl_rss *)skb->data;
1021         unsigned int tid = GET_TID(rpl);
1022         struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1023         struct tid_info *t = lldi->tids;
1024
1025         csk = lookup_tid(t, tid);
1026         if (!csk)
1027                 goto rel_skb;
1028
1029         if (csk)
1030                 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u, status %u.\n",
1031                                (&csk->saddr), (&csk->daddr), csk,
1032                                csk->state, csk->flags, csk->tid, rpl->status);
1033
1034         if (rpl->status == CPL_ERR_ABORT_FAILED)
1035                 goto rel_skb;
1036
1037         cxgbi_sock_rcv_abort_rpl(csk);
1038 rel_skb:
1039         __kfree_skb(skb);
1040 }
1041
1042 static void do_rx_data(struct cxgbi_device *cdev, struct sk_buff *skb)
1043 {
1044         struct cxgbi_sock *csk;
1045         struct cpl_rx_data *cpl = (struct cpl_rx_data *)skb->data;
1046         unsigned int tid = GET_TID(cpl);
1047         struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1048         struct tid_info *t = lldi->tids;
1049
1050         csk = lookup_tid(t, tid);
1051         if (!csk) {
1052                 pr_err("can't find connection for tid %u.\n", tid);
1053         } else {
1054                 /* not expecting this, reset the connection. */
1055                 pr_err("csk 0x%p, tid %u, rcv cpl_rx_data.\n", csk, tid);
1056                 spin_lock_bh(&csk->lock);
1057                 send_abort_req(csk);
1058                 spin_unlock_bh(&csk->lock);
1059         }
1060         __kfree_skb(skb);
1061 }
1062
1063 static void do_rx_iscsi_hdr(struct cxgbi_device *cdev, struct sk_buff *skb)
1064 {
1065         struct cxgbi_sock *csk;
1066         struct cpl_iscsi_hdr *cpl = (struct cpl_iscsi_hdr *)skb->data;
1067         unsigned short pdu_len_ddp = be16_to_cpu(cpl->pdu_len_ddp);
1068         unsigned int tid = GET_TID(cpl);
1069         struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1070         struct tid_info *t = lldi->tids;
1071
1072         csk = lookup_tid(t, tid);
1073         if (unlikely(!csk)) {
1074                 pr_err("can't find conn. for tid %u.\n", tid);
1075                 goto rel_skb;
1076         }
1077
1078         log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
1079                 "csk 0x%p,%u,0x%lx, tid %u, skb 0x%p,%u, 0x%x.\n",
1080                 csk, csk->state, csk->flags, csk->tid, skb, skb->len,
1081                 pdu_len_ddp);
1082
1083         spin_lock_bh(&csk->lock);
1084
1085         if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) {
1086                 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1087                         "csk 0x%p,%u,0x%lx,%u, bad state.\n",
1088                         csk, csk->state, csk->flags, csk->tid);
1089                 if (csk->state != CTP_ABORTING)
1090                         goto abort_conn;
1091                 else
1092                         goto discard;
1093         }
1094
1095         cxgbi_skcb_tcp_seq(skb) = ntohl(cpl->seq);
1096         cxgbi_skcb_flags(skb) = 0;
1097
1098         skb_reset_transport_header(skb);
1099         __skb_pull(skb, sizeof(*cpl));
1100         __pskb_trim(skb, ntohs(cpl->len));
1101
1102         if (!csk->skb_ulp_lhdr) {
1103                 unsigned char *bhs;
1104                 unsigned int hlen, dlen, plen;
1105
1106                 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
1107                         "csk 0x%p,%u,0x%lx, tid %u, skb 0x%p header.\n",
1108                         csk, csk->state, csk->flags, csk->tid, skb);
1109                 csk->skb_ulp_lhdr = skb;
1110                 cxgbi_skcb_set_flag(skb, SKCBF_RX_HDR);
1111
1112                 if (cxgbi_skcb_tcp_seq(skb) != csk->rcv_nxt) {
1113                         pr_info("tid %u, CPL_ISCSI_HDR, bad seq, 0x%x/0x%x.\n",
1114                                 csk->tid, cxgbi_skcb_tcp_seq(skb),
1115                                 csk->rcv_nxt);
1116                         goto abort_conn;
1117                 }
1118
1119                 bhs = skb->data;
1120                 hlen = ntohs(cpl->len);
1121                 dlen = ntohl(*(unsigned int *)(bhs + 4)) & 0xFFFFFF;
1122
1123                 plen = ISCSI_PDU_LEN_G(pdu_len_ddp);
1124                 if (is_t4(lldi->adapter_type))
1125                         plen -= 40;
1126
1127                 if ((hlen + dlen) != plen) {
1128                         pr_info("tid 0x%x, CPL_ISCSI_HDR, pdu len "
1129                                 "mismatch %u != %u + %u, seq 0x%x.\n",
1130                                 csk->tid, plen, hlen, dlen,
1131                                 cxgbi_skcb_tcp_seq(skb));
1132                         goto abort_conn;
1133                 }
1134
1135                 cxgbi_skcb_rx_pdulen(skb) = (hlen + dlen + 3) & (~0x3);
1136                 if (dlen)
1137                         cxgbi_skcb_rx_pdulen(skb) += csk->dcrc_len;
1138                 csk->rcv_nxt += cxgbi_skcb_rx_pdulen(skb);
1139
1140                 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
1141                         "csk 0x%p, skb 0x%p, 0x%x,%u+%u,0x%x,0x%x.\n",
1142                         csk, skb, *bhs, hlen, dlen,
1143                         ntohl(*((unsigned int *)(bhs + 16))),
1144                         ntohl(*((unsigned int *)(bhs + 24))));
1145
1146         } else {
1147                 struct sk_buff *lskb = csk->skb_ulp_lhdr;
1148
1149                 cxgbi_skcb_set_flag(lskb, SKCBF_RX_DATA);
1150                 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
1151                         "csk 0x%p,%u,0x%lx, skb 0x%p data, 0x%p.\n",
1152                         csk, csk->state, csk->flags, skb, lskb);
1153         }
1154
1155         __skb_queue_tail(&csk->receive_queue, skb);
1156         spin_unlock_bh(&csk->lock);
1157         return;
1158
1159 abort_conn:
1160         send_abort_req(csk);
1161 discard:
1162         spin_unlock_bh(&csk->lock);
1163 rel_skb:
1164         __kfree_skb(skb);
1165 }
1166
1167 static void do_rx_data_ddp(struct cxgbi_device *cdev,
1168                                   struct sk_buff *skb)
1169 {
1170         struct cxgbi_sock *csk;
1171         struct sk_buff *lskb;
1172         struct cpl_rx_data_ddp *rpl = (struct cpl_rx_data_ddp *)skb->data;
1173         unsigned int tid = GET_TID(rpl);
1174         struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1175         struct tid_info *t = lldi->tids;
1176         unsigned int status = ntohl(rpl->ddpvld);
1177
1178         csk = lookup_tid(t, tid);
1179         if (unlikely(!csk)) {
1180                 pr_err("can't find connection for tid %u.\n", tid);
1181                 goto rel_skb;
1182         }
1183
1184         log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
1185                 "csk 0x%p,%u,0x%lx, skb 0x%p,0x%x, lhdr 0x%p.\n",
1186                 csk, csk->state, csk->flags, skb, status, csk->skb_ulp_lhdr);
1187
1188         spin_lock_bh(&csk->lock);
1189
1190         if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) {
1191                 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1192                         "csk 0x%p,%u,0x%lx,%u, bad state.\n",
1193                         csk, csk->state, csk->flags, csk->tid);
1194                 if (csk->state != CTP_ABORTING)
1195                         goto abort_conn;
1196                 else
1197                         goto discard;
1198         }
1199
1200         if (!csk->skb_ulp_lhdr) {
1201                 pr_err("tid 0x%x, rcv RX_DATA_DDP w/o pdu bhs.\n", csk->tid);
1202                 goto abort_conn;
1203         }
1204
1205         lskb = csk->skb_ulp_lhdr;
1206         csk->skb_ulp_lhdr = NULL;
1207
1208         cxgbi_skcb_rx_ddigest(lskb) = ntohl(rpl->ulp_crc);
1209
1210         if (ntohs(rpl->len) != cxgbi_skcb_rx_pdulen(lskb))
1211                 pr_info("tid 0x%x, RX_DATA_DDP pdulen %u != %u.\n",
1212                         csk->tid, ntohs(rpl->len), cxgbi_skcb_rx_pdulen(lskb));
1213
1214         if (status & (1 << CPL_RX_DDP_STATUS_HCRC_SHIFT)) {
1215                 pr_info("csk 0x%p, lhdr 0x%p, status 0x%x, hcrc bad 0x%lx.\n",
1216                         csk, lskb, status, cxgbi_skcb_flags(lskb));
1217                 cxgbi_skcb_set_flag(lskb, SKCBF_RX_HCRC_ERR);
1218         }
1219         if (status & (1 << CPL_RX_DDP_STATUS_DCRC_SHIFT)) {
1220                 pr_info("csk 0x%p, lhdr 0x%p, status 0x%x, dcrc bad 0x%lx.\n",
1221                         csk, lskb, status, cxgbi_skcb_flags(lskb));
1222                 cxgbi_skcb_set_flag(lskb, SKCBF_RX_DCRC_ERR);
1223         }
1224         if (status & (1 << CPL_RX_DDP_STATUS_PAD_SHIFT)) {
1225                 log_debug(1 << CXGBI_DBG_PDU_RX,
1226                         "csk 0x%p, lhdr 0x%p, status 0x%x, pad bad.\n",
1227                         csk, lskb, status);
1228                 cxgbi_skcb_set_flag(lskb, SKCBF_RX_PAD_ERR);
1229         }
1230         if ((status & (1 << CPL_RX_DDP_STATUS_DDP_SHIFT)) &&
1231                 !cxgbi_skcb_test_flag(lskb, SKCBF_RX_DATA)) {
1232                 log_debug(1 << CXGBI_DBG_PDU_RX,
1233                         "csk 0x%p, lhdr 0x%p, 0x%x, data ddp'ed.\n",
1234                         csk, lskb, status);
1235                 cxgbi_skcb_set_flag(lskb, SKCBF_RX_DATA_DDPD);
1236         }
1237         log_debug(1 << CXGBI_DBG_PDU_RX,
1238                 "csk 0x%p, lskb 0x%p, f 0x%lx.\n",
1239                 csk, lskb, cxgbi_skcb_flags(lskb));
1240
1241         cxgbi_skcb_set_flag(lskb, SKCBF_RX_STATUS);
1242         cxgbi_conn_pdu_ready(csk);
1243         spin_unlock_bh(&csk->lock);
1244         goto rel_skb;
1245
1246 abort_conn:
1247         send_abort_req(csk);
1248 discard:
1249         spin_unlock_bh(&csk->lock);
1250 rel_skb:
1251         __kfree_skb(skb);
1252 }
1253
1254 static void do_fw4_ack(struct cxgbi_device *cdev, struct sk_buff *skb)
1255 {
1256         struct cxgbi_sock *csk;
1257         struct cpl_fw4_ack *rpl = (struct cpl_fw4_ack *)skb->data;
1258         unsigned int tid = GET_TID(rpl);
1259         struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1260         struct tid_info *t = lldi->tids;
1261
1262         csk = lookup_tid(t, tid);
1263         if (unlikely(!csk))
1264                 pr_err("can't find connection for tid %u.\n", tid);
1265         else {
1266                 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1267                         "csk 0x%p,%u,0x%lx,%u.\n",
1268                         csk, csk->state, csk->flags, csk->tid);
1269                 cxgbi_sock_rcv_wr_ack(csk, rpl->credits, ntohl(rpl->snd_una),
1270                                         rpl->seq_vld);
1271         }
1272         __kfree_skb(skb);
1273 }
1274
1275 static void do_set_tcb_rpl(struct cxgbi_device *cdev, struct sk_buff *skb)
1276 {
1277         struct cpl_set_tcb_rpl *rpl = (struct cpl_set_tcb_rpl *)skb->data;
1278         unsigned int tid = GET_TID(rpl);
1279         struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1280         struct tid_info *t = lldi->tids;
1281         struct cxgbi_sock *csk;
1282
1283         csk = lookup_tid(t, tid);
1284         if (!csk)
1285                 pr_err("can't find conn. for tid %u.\n", tid);
1286
1287         log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1288                 "csk 0x%p,%u,%lx,%u, status 0x%x.\n",
1289                 csk, csk->state, csk->flags, csk->tid, rpl->status);
1290
1291         if (rpl->status != CPL_ERR_NONE)
1292                 pr_err("csk 0x%p,%u, SET_TCB_RPL status %u.\n",
1293                         csk, tid, rpl->status);
1294
1295         __kfree_skb(skb);
1296 }
1297
1298 static int alloc_cpls(struct cxgbi_sock *csk)
1299 {
1300         csk->cpl_close = alloc_wr(sizeof(struct cpl_close_con_req),
1301                                         0, GFP_KERNEL);
1302         if (!csk->cpl_close)
1303                 return -ENOMEM;
1304
1305         csk->cpl_abort_req = alloc_wr(sizeof(struct cpl_abort_req),
1306                                         0, GFP_KERNEL);
1307         if (!csk->cpl_abort_req)
1308                 goto free_cpls;
1309
1310         csk->cpl_abort_rpl = alloc_wr(sizeof(struct cpl_abort_rpl),
1311                                         0, GFP_KERNEL);
1312         if (!csk->cpl_abort_rpl)
1313                 goto free_cpls;
1314         return 0;
1315
1316 free_cpls:
1317         cxgbi_sock_free_cpl_skbs(csk);
1318         return -ENOMEM;
1319 }
1320
1321 static inline void l2t_put(struct cxgbi_sock *csk)
1322 {
1323         if (csk->l2t) {
1324                 cxgb4_l2t_release(csk->l2t);
1325                 csk->l2t = NULL;
1326                 cxgbi_sock_put(csk);
1327         }
1328 }
1329
1330 static void release_offload_resources(struct cxgbi_sock *csk)
1331 {
1332         struct cxgb4_lld_info *lldi;
1333 #if IS_ENABLED(CONFIG_IPV6)
1334         struct net_device *ndev = csk->cdev->ports[csk->port_id];
1335 #endif
1336
1337         log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1338                 "csk 0x%p,%u,0x%lx,%u.\n",
1339                 csk, csk->state, csk->flags, csk->tid);
1340
1341         cxgbi_sock_free_cpl_skbs(csk);
1342         if (csk->wr_cred != csk->wr_max_cred) {
1343                 cxgbi_sock_purge_wr_queue(csk);
1344                 cxgbi_sock_reset_wr_list(csk);
1345         }
1346
1347         l2t_put(csk);
1348 #if IS_ENABLED(CONFIG_IPV6)
1349         if (csk->csk_family == AF_INET6)
1350                 cxgb4_clip_release(ndev,
1351                                    (const u32 *)&csk->saddr6.sin6_addr, 1);
1352 #endif
1353
1354         if (cxgbi_sock_flag(csk, CTPF_HAS_ATID))
1355                 free_atid(csk);
1356         else if (cxgbi_sock_flag(csk, CTPF_HAS_TID)) {
1357                 lldi = cxgbi_cdev_priv(csk->cdev);
1358                 cxgb4_remove_tid(lldi->tids, 0, csk->tid);
1359                 cxgbi_sock_clear_flag(csk, CTPF_HAS_TID);
1360                 cxgbi_sock_put(csk);
1361         }
1362         csk->dst = NULL;
1363         csk->cdev = NULL;
1364 }
1365
1366 static int init_act_open(struct cxgbi_sock *csk)
1367 {
1368         struct cxgbi_device *cdev = csk->cdev;
1369         struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1370         struct net_device *ndev = cdev->ports[csk->port_id];
1371         struct sk_buff *skb = NULL;
1372         struct neighbour *n = NULL;
1373         void *daddr;
1374         unsigned int step;
1375         unsigned int size, size6;
1376         int t4 = is_t4(lldi->adapter_type);
1377         unsigned int linkspeed;
1378         unsigned int rcv_winf, snd_winf;
1379
1380         log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1381                 "csk 0x%p,%u,0x%lx,%u.\n",
1382                 csk, csk->state, csk->flags, csk->tid);
1383
1384         if (csk->csk_family == AF_INET)
1385                 daddr = &csk->daddr.sin_addr.s_addr;
1386 #if IS_ENABLED(CONFIG_IPV6)
1387         else if (csk->csk_family == AF_INET6)
1388                 daddr = &csk->daddr6.sin6_addr;
1389 #endif
1390         else {
1391                 pr_err("address family 0x%x not supported\n", csk->csk_family);
1392                 goto rel_resource;
1393         }
1394
1395         n = dst_neigh_lookup(csk->dst, daddr);
1396
1397         if (!n) {
1398                 pr_err("%s, can't get neighbour of csk->dst.\n", ndev->name);
1399                 goto rel_resource;
1400         }
1401
1402         csk->atid = cxgb4_alloc_atid(lldi->tids, csk);
1403         if (csk->atid < 0) {
1404                 pr_err("%s, NO atid available.\n", ndev->name);
1405                 return -EINVAL;
1406         }
1407         cxgbi_sock_set_flag(csk, CTPF_HAS_ATID);
1408         cxgbi_sock_get(csk);
1409
1410         csk->l2t = cxgb4_l2t_get(lldi->l2t, n, ndev, 0);
1411         if (!csk->l2t) {
1412                 pr_err("%s, cannot alloc l2t.\n", ndev->name);
1413                 goto rel_resource_without_clip;
1414         }
1415         cxgbi_sock_get(csk);
1416
1417 #if IS_ENABLED(CONFIG_IPV6)
1418         if (csk->csk_family == AF_INET6)
1419                 cxgb4_clip_get(ndev, (const u32 *)&csk->saddr6.sin6_addr, 1);
1420 #endif
1421
1422         if (t4) {
1423                 size = sizeof(struct cpl_act_open_req);
1424                 size6 = sizeof(struct cpl_act_open_req6);
1425         } else {
1426                 size = sizeof(struct cpl_t5_act_open_req);
1427                 size6 = sizeof(struct cpl_t5_act_open_req6);
1428         }
1429
1430         if (csk->csk_family == AF_INET)
1431                 skb = alloc_wr(size, 0, GFP_NOIO);
1432 #if IS_ENABLED(CONFIG_IPV6)
1433         else
1434                 skb = alloc_wr(size6, 0, GFP_NOIO);
1435 #endif
1436
1437         if (!skb)
1438                 goto rel_resource;
1439         skb->sk = (struct sock *)csk;
1440         t4_set_arp_err_handler(skb, csk, cxgbi_sock_act_open_req_arp_failure);
1441
1442         if (!csk->mtu)
1443                 csk->mtu = dst_mtu(csk->dst);
1444         cxgb4_best_mtu(lldi->mtus, csk->mtu, &csk->mss_idx);
1445         csk->tx_chan = cxgb4_port_chan(ndev);
1446         /* SMT two entries per row */
1447         csk->smac_idx = ((cxgb4_port_viid(ndev) & 0x7F)) << 1;
1448         step = lldi->ntxq / lldi->nchan;
1449         csk->txq_idx = cxgb4_port_idx(ndev) * step;
1450         step = lldi->nrxq / lldi->nchan;
1451         csk->rss_qid = lldi->rxq_ids[cxgb4_port_idx(ndev) * step];
1452         linkspeed = ((struct port_info *)netdev_priv(ndev))->link_cfg.speed;
1453         csk->snd_win = cxgb4i_snd_win;
1454         csk->rcv_win = cxgb4i_rcv_win;
1455         if (cxgb4i_rcv_win <= 0) {
1456                 csk->rcv_win = CXGB4I_DEFAULT_10G_RCV_WIN;
1457                 rcv_winf = linkspeed / SPEED_10000;
1458                 if (rcv_winf)
1459                         csk->rcv_win *= rcv_winf;
1460         }
1461         if (cxgb4i_snd_win <= 0) {
1462                 csk->snd_win = CXGB4I_DEFAULT_10G_SND_WIN;
1463                 snd_winf = linkspeed / SPEED_10000;
1464                 if (snd_winf)
1465                         csk->snd_win *= snd_winf;
1466         }
1467         csk->wr_cred = lldi->wr_cred -
1468                        DIV_ROUND_UP(sizeof(struct cpl_abort_req), 16);
1469         csk->wr_max_cred = csk->wr_cred;
1470         csk->wr_una_cred = 0;
1471         cxgbi_sock_reset_wr_list(csk);
1472         csk->err = 0;
1473
1474         pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u,%u,%u, mtu %u,%u, smac %u.\n",
1475                        (&csk->saddr), (&csk->daddr), csk, csk->state,
1476                        csk->flags, csk->tx_chan, csk->txq_idx, csk->rss_qid,
1477                        csk->mtu, csk->mss_idx, csk->smac_idx);
1478
1479         /* must wait for either a act_open_rpl or act_open_establish */
1480         try_module_get(THIS_MODULE);
1481         cxgbi_sock_set_state(csk, CTP_ACTIVE_OPEN);
1482         if (csk->csk_family == AF_INET)
1483                 send_act_open_req(csk, skb, csk->l2t);
1484 #if IS_ENABLED(CONFIG_IPV6)
1485         else
1486                 send_act_open_req6(csk, skb, csk->l2t);
1487 #endif
1488         neigh_release(n);
1489
1490         return 0;
1491
1492 rel_resource:
1493 #if IS_ENABLED(CONFIG_IPV6)
1494         if (csk->csk_family == AF_INET6)
1495                 cxgb4_clip_release(ndev,
1496                                    (const u32 *)&csk->saddr6.sin6_addr, 1);
1497 #endif
1498 rel_resource_without_clip:
1499         if (n)
1500                 neigh_release(n);
1501         if (skb)
1502                 __kfree_skb(skb);
1503         return -EINVAL;
1504 }
1505
1506 static cxgb4i_cplhandler_func cxgb4i_cplhandlers[NUM_CPL_CMDS] = {
1507         [CPL_ACT_ESTABLISH] = do_act_establish,
1508         [CPL_ACT_OPEN_RPL] = do_act_open_rpl,
1509         [CPL_PEER_CLOSE] = do_peer_close,
1510         [CPL_ABORT_REQ_RSS] = do_abort_req_rss,
1511         [CPL_ABORT_RPL_RSS] = do_abort_rpl_rss,
1512         [CPL_CLOSE_CON_RPL] = do_close_con_rpl,
1513         [CPL_FW4_ACK] = do_fw4_ack,
1514         [CPL_ISCSI_HDR] = do_rx_iscsi_hdr,
1515         [CPL_ISCSI_DATA] = do_rx_iscsi_hdr,
1516         [CPL_SET_TCB_RPL] = do_set_tcb_rpl,
1517         [CPL_RX_DATA_DDP] = do_rx_data_ddp,
1518         [CPL_RX_ISCSI_DDP] = do_rx_data_ddp,
1519         [CPL_RX_DATA] = do_rx_data,
1520 };
1521
1522 static int cxgb4i_ofld_init(struct cxgbi_device *cdev)
1523 {
1524         int rc;
1525
1526         if (cxgb4i_max_connect > CXGB4I_MAX_CONN)
1527                 cxgb4i_max_connect = CXGB4I_MAX_CONN;
1528
1529         rc = cxgbi_device_portmap_create(cdev, cxgb4i_sport_base,
1530                                         cxgb4i_max_connect);
1531         if (rc < 0)
1532                 return rc;
1533
1534         cdev->csk_release_offload_resources = release_offload_resources;
1535         cdev->csk_push_tx_frames = push_tx_frames;
1536         cdev->csk_send_abort_req = send_abort_req;
1537         cdev->csk_send_close_req = send_close_req;
1538         cdev->csk_send_rx_credits = send_rx_credits;
1539         cdev->csk_alloc_cpls = alloc_cpls;
1540         cdev->csk_init_act_open = init_act_open;
1541
1542         pr_info("cdev 0x%p, offload up, added.\n", cdev);
1543         return 0;
1544 }
1545
1546 static inline void
1547 ulp_mem_io_set_hdr(struct cxgbi_device *cdev,
1548                    struct ulp_mem_io *req,
1549                    unsigned int wr_len, unsigned int dlen,
1550                    unsigned int pm_addr,
1551                    int tid)
1552 {
1553         struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1554         struct ulptx_idata *idata = (struct ulptx_idata *)(req + 1);
1555
1556         INIT_ULPTX_WR(req, wr_len, 0, tid);
1557         req->wr.wr_hi = htonl(FW_WR_OP_V(FW_ULPTX_WR) |
1558                 FW_WR_ATOMIC_V(0));
1559         req->cmd = htonl(ULPTX_CMD_V(ULP_TX_MEM_WRITE) |
1560                 ULP_MEMIO_ORDER_V(is_t4(lldi->adapter_type)) |
1561                 T5_ULP_MEMIO_IMM_V(!is_t4(lldi->adapter_type)));
1562         req->dlen = htonl(ULP_MEMIO_DATA_LEN_V(dlen >> 5));
1563         req->lock_addr = htonl(ULP_MEMIO_ADDR_V(pm_addr >> 5));
1564         req->len16 = htonl(DIV_ROUND_UP(wr_len - sizeof(req->wr), 16));
1565
1566         idata->cmd_more = htonl(ULPTX_CMD_V(ULP_TX_SC_IMM));
1567         idata->len = htonl(dlen);
1568 }
1569
1570 static struct sk_buff *
1571 ddp_ppod_init_idata(struct cxgbi_device *cdev,
1572                     struct cxgbi_ppm *ppm,
1573                     unsigned int idx, unsigned int npods,
1574                     unsigned int tid)
1575 {
1576         unsigned int pm_addr = (idx << PPOD_SIZE_SHIFT) + ppm->llimit;
1577         unsigned int dlen = npods << PPOD_SIZE_SHIFT;
1578         unsigned int wr_len = roundup(sizeof(struct ulp_mem_io) +
1579                                 sizeof(struct ulptx_idata) + dlen, 16);
1580         struct sk_buff *skb = alloc_wr(wr_len, 0, GFP_ATOMIC);
1581
1582         if (!skb) {
1583                 pr_err("%s: %s idx %u, npods %u, OOM.\n",
1584                        __func__, ppm->ndev->name, idx, npods);
1585                 return NULL;
1586         }
1587
1588         ulp_mem_io_set_hdr(cdev, (struct ulp_mem_io *)skb->head, wr_len, dlen,
1589                            pm_addr, tid);
1590
1591         return skb;
1592 }
1593
1594 static int ddp_ppod_write_idata(struct cxgbi_ppm *ppm, struct cxgbi_sock *csk,
1595                                 struct cxgbi_task_tag_info *ttinfo,
1596                                 unsigned int idx, unsigned int npods,
1597                                 struct scatterlist **sg_pp,
1598                                 unsigned int *sg_off)
1599 {
1600         struct cxgbi_device *cdev = csk->cdev;
1601         struct sk_buff *skb = ddp_ppod_init_idata(cdev, ppm, idx, npods,
1602                                                   csk->tid);
1603         struct ulp_mem_io *req;
1604         struct ulptx_idata *idata;
1605         struct cxgbi_pagepod *ppod;
1606         int i;
1607
1608         if (!skb)
1609                 return -ENOMEM;
1610
1611         req = (struct ulp_mem_io *)skb->head;
1612         idata = (struct ulptx_idata *)(req + 1);
1613         ppod = (struct cxgbi_pagepod *)(idata + 1);
1614
1615         for (i = 0; i < npods; i++, ppod++)
1616                 cxgbi_ddp_set_one_ppod(ppod, ttinfo, sg_pp, sg_off);
1617
1618         cxgbi_skcb_set_flag(skb, SKCBF_TX_MEM_WRITE);
1619         cxgbi_skcb_set_flag(skb, SKCBF_TX_FLAG_COMPL);
1620         set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id);
1621
1622         spin_lock_bh(&csk->lock);
1623         cxgbi_sock_skb_entail(csk, skb);
1624         spin_unlock_bh(&csk->lock);
1625
1626         return 0;
1627 }
1628
1629 static int ddp_set_map(struct cxgbi_ppm *ppm, struct cxgbi_sock *csk,
1630                        struct cxgbi_task_tag_info *ttinfo)
1631 {
1632         unsigned int pidx = ttinfo->idx;
1633         unsigned int npods = ttinfo->npods;
1634         unsigned int i, cnt;
1635         int err = 0;
1636         struct scatterlist *sg = ttinfo->sgl;
1637         unsigned int offset = 0;
1638
1639         ttinfo->cid = csk->port_id;
1640
1641         for (i = 0; i < npods; i += cnt, pidx += cnt) {
1642                 cnt = npods - i;
1643
1644                 if (cnt > ULPMEM_IDATA_MAX_NPPODS)
1645                         cnt = ULPMEM_IDATA_MAX_NPPODS;
1646                 err = ddp_ppod_write_idata(ppm, csk, ttinfo, pidx, cnt,
1647                                            &sg, &offset);
1648                 if (err < 0)
1649                         break;
1650         }
1651
1652         return err;
1653 }
1654
1655 static int ddp_setup_conn_pgidx(struct cxgbi_sock *csk, unsigned int tid,
1656                                 int pg_idx, bool reply)
1657 {
1658         struct sk_buff *skb;
1659         struct cpl_set_tcb_field *req;
1660
1661         if (!pg_idx || pg_idx >= DDP_PGIDX_MAX)
1662                 return 0;
1663
1664         skb = alloc_wr(sizeof(*req), 0, GFP_KERNEL);
1665         if (!skb)
1666                 return -ENOMEM;
1667
1668         /*  set up ulp page size */
1669         req = (struct cpl_set_tcb_field *)skb->head;
1670         INIT_TP_WR(req, csk->tid);
1671         OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, csk->tid));
1672         req->reply_ctrl = htons(NO_REPLY_V(reply) | QUEUENO_V(csk->rss_qid));
1673         req->word_cookie = htons(0);
1674         req->mask = cpu_to_be64(0x3 << 8);
1675         req->val = cpu_to_be64(pg_idx << 8);
1676         set_wr_txq(skb, CPL_PRIORITY_CONTROL, csk->port_id);
1677
1678         log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1679                 "csk 0x%p, tid 0x%x, pg_idx %u.\n", csk, csk->tid, pg_idx);
1680
1681         cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
1682         return 0;
1683 }
1684
1685 static int ddp_setup_conn_digest(struct cxgbi_sock *csk, unsigned int tid,
1686                                  int hcrc, int dcrc, int reply)
1687 {
1688         struct sk_buff *skb;
1689         struct cpl_set_tcb_field *req;
1690
1691         if (!hcrc && !dcrc)
1692                 return 0;
1693
1694         skb = alloc_wr(sizeof(*req), 0, GFP_KERNEL);
1695         if (!skb)
1696                 return -ENOMEM;
1697
1698         csk->hcrc_len = (hcrc ? 4 : 0);
1699         csk->dcrc_len = (dcrc ? 4 : 0);
1700         /*  set up ulp submode */
1701         req = (struct cpl_set_tcb_field *)skb->head;
1702         INIT_TP_WR(req, tid);
1703         OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, tid));
1704         req->reply_ctrl = htons(NO_REPLY_V(reply) | QUEUENO_V(csk->rss_qid));
1705         req->word_cookie = htons(0);
1706         req->mask = cpu_to_be64(0x3 << 4);
1707         req->val = cpu_to_be64(((hcrc ? ULP_CRC_HEADER : 0) |
1708                                 (dcrc ? ULP_CRC_DATA : 0)) << 4);
1709         set_wr_txq(skb, CPL_PRIORITY_CONTROL, csk->port_id);
1710
1711         log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1712                 "csk 0x%p, tid 0x%x, crc %d,%d.\n", csk, csk->tid, hcrc, dcrc);
1713
1714         cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
1715         return 0;
1716 }
1717
1718 static struct cxgbi_ppm *cdev2ppm(struct cxgbi_device *cdev)
1719 {
1720         return (struct cxgbi_ppm *)(*((struct cxgb4_lld_info *)
1721                                        (cxgbi_cdev_priv(cdev)))->iscsi_ppm);
1722 }
1723
1724 static int cxgb4i_ddp_init(struct cxgbi_device *cdev)
1725 {
1726         struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1727         struct net_device *ndev = cdev->ports[0];
1728         struct cxgbi_tag_format tformat;
1729         unsigned int ppmax;
1730         int i;
1731
1732         if (!lldi->vr->iscsi.size) {
1733                 pr_warn("%s, iscsi NOT enabled, check config!\n", ndev->name);
1734                 return -EACCES;
1735         }
1736
1737         cdev->flags |= CXGBI_FLAG_USE_PPOD_OFLDQ;
1738         ppmax = lldi->vr->iscsi.size >> PPOD_SIZE_SHIFT;
1739
1740         memset(&tformat, 0, sizeof(struct cxgbi_tag_format));
1741         for (i = 0; i < 4; i++)
1742                 tformat.pgsz_order[i] = (lldi->iscsi_pgsz_order >> (i << 3))
1743                                          & 0xF;
1744         cxgbi_tagmask_check(lldi->iscsi_tagmask, &tformat);
1745
1746         cxgbi_ddp_ppm_setup(lldi->iscsi_ppm, cdev, &tformat, ppmax,
1747                             lldi->iscsi_llimit, lldi->vr->iscsi.start, 2);
1748
1749         cdev->csk_ddp_setup_digest = ddp_setup_conn_digest;
1750         cdev->csk_ddp_setup_pgidx = ddp_setup_conn_pgidx;
1751         cdev->csk_ddp_set_map = ddp_set_map;
1752         cdev->tx_max_size = min_t(unsigned int, ULP2_MAX_PDU_PAYLOAD,
1753                                   lldi->iscsi_iolen - ISCSI_PDU_NONPAYLOAD_LEN);
1754         cdev->rx_max_size = min_t(unsigned int, ULP2_MAX_PDU_PAYLOAD,
1755                                   lldi->iscsi_iolen - ISCSI_PDU_NONPAYLOAD_LEN);
1756         cdev->cdev2ppm = cdev2ppm;
1757
1758         return 0;
1759 }
1760
1761 static void *t4_uld_add(const struct cxgb4_lld_info *lldi)
1762 {
1763         struct cxgbi_device *cdev;
1764         struct port_info *pi;
1765         int i, rc;
1766
1767         cdev = cxgbi_device_register(sizeof(*lldi), lldi->nports);
1768         if (!cdev) {
1769                 pr_info("t4 device 0x%p, register failed.\n", lldi);
1770                 return NULL;
1771         }
1772         pr_info("0x%p,0x%x, ports %u,%s, chan %u, q %u,%u, wr %u.\n",
1773                 cdev, lldi->adapter_type, lldi->nports,
1774                 lldi->ports[0]->name, lldi->nchan, lldi->ntxq,
1775                 lldi->nrxq, lldi->wr_cred);
1776         for (i = 0; i < lldi->nrxq; i++)
1777                 log_debug(1 << CXGBI_DBG_DEV,
1778                         "t4 0x%p, rxq id #%d: %u.\n",
1779                         cdev, i, lldi->rxq_ids[i]);
1780
1781         memcpy(cxgbi_cdev_priv(cdev), lldi, sizeof(*lldi));
1782         cdev->flags = CXGBI_FLAG_DEV_T4;
1783         cdev->pdev = lldi->pdev;
1784         cdev->ports = lldi->ports;
1785         cdev->nports = lldi->nports;
1786         cdev->mtus = lldi->mtus;
1787         cdev->nmtus = NMTUS;
1788         cdev->rx_credit_thres = cxgb4i_rx_credit_thres;
1789         cdev->skb_tx_rsvd = CXGB4I_TX_HEADER_LEN;
1790         cdev->skb_rx_extra = sizeof(struct cpl_iscsi_hdr);
1791         cdev->itp = &cxgb4i_iscsi_transport;
1792
1793         cdev->pfvf = FW_VIID_PFN_G(cxgb4_port_viid(lldi->ports[0]))
1794                         << FW_VIID_PFN_S;
1795         pr_info("cdev 0x%p,%s, pfvf %u.\n",
1796                 cdev, lldi->ports[0]->name, cdev->pfvf);
1797
1798         rc = cxgb4i_ddp_init(cdev);
1799         if (rc) {
1800                 pr_info("t4 0x%p ddp init failed.\n", cdev);
1801                 goto err_out;
1802         }
1803         rc = cxgb4i_ofld_init(cdev);
1804         if (rc) {
1805                 pr_info("t4 0x%p ofld init failed.\n", cdev);
1806                 goto err_out;
1807         }
1808
1809         rc = cxgbi_hbas_add(cdev, CXGB4I_MAX_LUN, CXGBI_MAX_CONN,
1810                                 &cxgb4i_host_template, cxgb4i_stt);
1811         if (rc)
1812                 goto err_out;
1813
1814         for (i = 0; i < cdev->nports; i++) {
1815                 pi = netdev_priv(lldi->ports[i]);
1816                 cdev->hbas[i]->port_id = pi->port_id;
1817         }
1818         return cdev;
1819
1820 err_out:
1821         cxgbi_device_unregister(cdev);
1822         return ERR_PTR(-ENOMEM);
1823 }
1824
1825 #define RX_PULL_LEN     128
1826 static int t4_uld_rx_handler(void *handle, const __be64 *rsp,
1827                                 const struct pkt_gl *pgl)
1828 {
1829         const struct cpl_act_establish *rpl;
1830         struct sk_buff *skb;
1831         unsigned int opc;
1832         struct cxgbi_device *cdev = handle;
1833
1834         if (pgl == NULL) {
1835                 unsigned int len = 64 - sizeof(struct rsp_ctrl) - 8;
1836
1837                 skb = alloc_wr(len, 0, GFP_ATOMIC);
1838                 if (!skb)
1839                         goto nomem;
1840                 skb_copy_to_linear_data(skb, &rsp[1], len);
1841         } else {
1842                 if (unlikely(*(u8 *)rsp != *(u8 *)pgl->va)) {
1843                         pr_info("? FL 0x%p,RSS%#llx,FL %#llx,len %u.\n",
1844                                 pgl->va, be64_to_cpu(*rsp),
1845                                 be64_to_cpu(*(u64 *)pgl->va),
1846                                 pgl->tot_len);
1847                         return 0;
1848                 }
1849                 skb = cxgb4_pktgl_to_skb(pgl, RX_PULL_LEN, RX_PULL_LEN);
1850                 if (unlikely(!skb))
1851                         goto nomem;
1852         }
1853
1854         rpl = (struct cpl_act_establish *)skb->data;
1855         opc = rpl->ot.opcode;
1856         log_debug(1 << CXGBI_DBG_TOE,
1857                 "cdev %p, opcode 0x%x(0x%x,0x%x), skb %p.\n",
1858                  cdev, opc, rpl->ot.opcode_tid, ntohl(rpl->ot.opcode_tid), skb);
1859         if (cxgb4i_cplhandlers[opc])
1860                 cxgb4i_cplhandlers[opc](cdev, skb);
1861         else {
1862                 pr_err("No handler for opcode 0x%x.\n", opc);
1863                 __kfree_skb(skb);
1864         }
1865         return 0;
1866 nomem:
1867         log_debug(1 << CXGBI_DBG_TOE, "OOM bailing out.\n");
1868         return 1;
1869 }
1870
1871 static int t4_uld_state_change(void *handle, enum cxgb4_state state)
1872 {
1873         struct cxgbi_device *cdev = handle;
1874
1875         switch (state) {
1876         case CXGB4_STATE_UP:
1877                 pr_info("cdev 0x%p, UP.\n", cdev);
1878                 break;
1879         case CXGB4_STATE_START_RECOVERY:
1880                 pr_info("cdev 0x%p, RECOVERY.\n", cdev);
1881                 /* close all connections */
1882                 break;
1883         case CXGB4_STATE_DOWN:
1884                 pr_info("cdev 0x%p, DOWN.\n", cdev);
1885                 break;
1886         case CXGB4_STATE_DETACH:
1887                 pr_info("cdev 0x%p, DETACH.\n", cdev);
1888                 cxgbi_device_unregister(cdev);
1889                 break;
1890         default:
1891                 pr_info("cdev 0x%p, unknown state %d.\n", cdev, state);
1892                 break;
1893         }
1894         return 0;
1895 }
1896
1897 static int __init cxgb4i_init_module(void)
1898 {
1899         int rc;
1900
1901         printk(KERN_INFO "%s", version);
1902
1903         rc = cxgbi_iscsi_init(&cxgb4i_iscsi_transport, &cxgb4i_stt);
1904         if (rc < 0)
1905                 return rc;
1906         cxgb4_register_uld(CXGB4_ULD_ISCSI, &cxgb4i_uld_info);
1907
1908         return 0;
1909 }
1910
1911 static void __exit cxgb4i_exit_module(void)
1912 {
1913         cxgb4_unregister_uld(CXGB4_ULD_ISCSI);
1914         cxgbi_device_unregister_all(CXGBI_FLAG_DEV_T4);
1915         cxgbi_iscsi_cleanup(&cxgb4i_iscsi_transport, &cxgb4i_stt);
1916 }
1917
1918 module_init(cxgb4i_init_module);
1919 module_exit(cxgb4i_exit_module);