drivers/scsi/cxgbi/cxgb4i/cxgb4i.c

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