drivers/scsi/cxgbi/cxgb4i/cxgb4i.c

   1 /*
   2  * cxgb4i.c: Chelsio T4 iSCSI driver.
   3  *
   4  * Copyright (c) 2010 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/module.h>
  17 #include <linux/moduleparam.h>
  18 #include <scsi/scsi_host.h>
  19 #include <net/tcp.h>
  20 #include <net/dst.h>
  21 #include <linux/netdevice.h>
  22 #include <net/addrconf.h>
  23
  24 #include "t4_regs.h"
  25 #include "t4_msg.h"
  26 #include "cxgb4.h"
  27 #include "cxgb4_uld.h"
  28 #include "t4fw_api.h"
  29 #include "l2t.h"
  30 #include "cxgb4i.h"
  31
  32 static unsigned int dbg_level;
  33
  34 #include "../libcxgbi.h"
  35
  36 #define DRV_MODULE_NAME         "cxgb4i"
  37 #define DRV_MODULE_DESC         "Chelsio T4/T5 iSCSI Driver"
  38 #define DRV_MODULE_VERSION      "0.9.4"
  39
  40 static char version[] =
  41         DRV_MODULE_DESC " " DRV_MODULE_NAME
  42         " v" DRV_MODULE_VERSION "\n";
  43
  44 MODULE_AUTHOR("Chelsio Communications, Inc.");
  45 MODULE_DESCRIPTION(DRV_MODULE_DESC);
  46 MODULE_VERSION(DRV_MODULE_VERSION);
  47 MODULE_LICENSE("GPL");
  48
  49 module_param(dbg_level, uint, 0644);
  50 MODULE_PARM_DESC(dbg_level, "Debug flag (default=0)");
  51
  52 static int cxgb4i_rcv_win = 256 * 1024;
  53 module_param(cxgb4i_rcv_win, int, 0644);
  54 MODULE_PARM_DESC(cxgb4i_rcv_win, "TCP reveive window in bytes");
  55
  56 static int cxgb4i_snd_win = 128 * 1024;
  57 module_param(cxgb4i_snd_win, int, 0644);
  58 MODULE_PARM_DESC(cxgb4i_snd_win, "TCP send window in bytes");
  59
  60 static int cxgb4i_rx_credit_thres = 10 * 1024;
  61 module_param(cxgb4i_rx_credit_thres, int, 0644);
  62 MODULE_PARM_DESC(cxgb4i_rx_credit_thres,
  63                 "RX credits return threshold in bytes (default=10KB)");
  64
  65 static unsigned int cxgb4i_max_connect = (8 * 1024);
  66 module_param(cxgb4i_max_connect, uint, 0644);
  67 MODULE_PARM_DESC(cxgb4i_max_connect, "Maximum number of connections");
  68
  69 static unsigned short cxgb4i_sport_base = 20000;
  70 module_param(cxgb4i_sport_base, ushort, 0644);
  71 MODULE_PARM_DESC(cxgb4i_sport_base, "Starting port number (default 20000)");
  72
  73 typedef void (*cxgb4i_cplhandler_func)(struct cxgbi_device *, struct sk_buff *);
  74
  75 static void *t4_uld_add(const struct cxgb4_lld_info *);
  76 static int t4_uld_rx_handler(void *, const __be64 *, const struct pkt_gl *);
  77 static int t4_uld_state_change(void *, enum cxgb4_state state);
  78
  79 static const struct cxgb4_uld_info cxgb4i_uld_info = {
  80         .name = DRV_MODULE_NAME,
  81         .add = t4_uld_add,
  82         .rx_handler = t4_uld_rx_handler,
  83         .state_change = t4_uld_state_change,
  84 };
  85
  86 static struct scsi_host_template cxgb4i_host_template = {
  87         .module         = THIS_MODULE,
  88         .name           = DRV_MODULE_NAME,
  89         .proc_name      = DRV_MODULE_NAME,
  90         .can_queue      = CXGB4I_SCSI_HOST_QDEPTH,
  91         .queuecommand   = iscsi_queuecommand,
  92         .change_queue_depth = iscsi_change_queue_depth,
  93         .sg_tablesize   = SG_ALL,
  94         .max_sectors    = 0xFFFF,
  95         .cmd_per_lun    = ISCSI_DEF_CMD_PER_LUN,
  96         .eh_abort_handler = iscsi_eh_abort,
  97         .eh_device_reset_handler = iscsi_eh_device_reset,
  98         .eh_target_reset_handler = iscsi_eh_recover_target,
  99         .target_alloc   = iscsi_target_alloc,
 100         .use_clustering = DISABLE_CLUSTERING,
 101         .this_id        = -1,
 102 };
 103
 104 static struct iscsi_transport cxgb4i_iscsi_transport = {
 105         .owner          = THIS_MODULE,
 106         .name           = DRV_MODULE_NAME,
 107         .caps           = CAP_RECOVERY_L0 | CAP_MULTI_R2T | CAP_HDRDGST |
 108                                 CAP_DATADGST | CAP_DIGEST_OFFLOAD |
 109                                 CAP_PADDING_OFFLOAD | CAP_TEXT_NEGO,
 110         .attr_is_visible        = cxgbi_attr_is_visible,
 111         .get_host_param = cxgbi_get_host_param,
 112         .set_host_param = cxgbi_set_host_param,
 113         /* session management */
 114         .create_session = cxgbi_create_session,
 115         .destroy_session        = cxgbi_destroy_session,
 116         .get_session_param = iscsi_session_get_param,
 117         /* connection management */
 118         .create_conn    = cxgbi_create_conn,
 119         .bind_conn              = cxgbi_bind_conn,
 120         .destroy_conn   = iscsi_tcp_conn_teardown,
 121         .start_conn             = iscsi_conn_start,
 122         .stop_conn              = iscsi_conn_stop,
 123         .get_conn_param = iscsi_conn_get_param,
 124         .set_param      = cxgbi_set_conn_param,
 125         .get_stats      = cxgbi_get_conn_stats,
 126         /* pdu xmit req from user space */
 127         .send_pdu       = iscsi_conn_send_pdu,
 128         /* task */
 129         .init_task      = iscsi_tcp_task_init,
 130         .xmit_task      = iscsi_tcp_task_xmit,
 131         .cleanup_task   = cxgbi_cleanup_task,
 132         /* pdu */
 133         .alloc_pdu      = cxgbi_conn_alloc_pdu,
 134         .init_pdu       = cxgbi_conn_init_pdu,
 135         .xmit_pdu       = cxgbi_conn_xmit_pdu,
 136         .parse_pdu_itt  = cxgbi_parse_pdu_itt,
 137         /* TCP connect/disconnect */
 138         .get_ep_param   = cxgbi_get_ep_param,
 139         .ep_connect     = cxgbi_ep_connect,
 140         .ep_poll        = cxgbi_ep_poll,
 141         .ep_disconnect  = cxgbi_ep_disconnect,
 142         /* Error recovery timeout call */
 143         .session_recovery_timedout = iscsi_session_recovery_timedout,
 144 };
 145
 146 static struct scsi_transport_template *cxgb4i_stt;
 147
 148 /*
 149  * CPL (Chelsio Protocol Language) defines a message passing interface between
 150  * the host driver and Chelsio asic.
 151  * The section below implments CPLs that related to iscsi tcp connection
 152  * open/close/abort and data send/receive.
 153  */
 154
 155 #define DIV_ROUND_UP(n, d)      (((n) + (d) - 1) / (d))
 156 #define RCV_BUFSIZ_MASK         0x3FFU
 157 #define MAX_IMM_TX_PKT_LEN      128
 158
 159 static inline void set_queue(struct sk_buff *skb, unsigned int queue,
 160                                 const struct cxgbi_sock *csk)
 161 {
 162         skb->queue_mapping = queue;
 163 }
 164
 165 static int push_tx_frames(struct cxgbi_sock *, int);
 166
 167 /*
 168  * is_ofld_imm - check whether a packet can be sent as immediate data
 169  * @skb: the packet
 170  *
 171  * Returns true if a packet can be sent as an offload WR with immediate
 172  * data.  We currently use the same limit as for Ethernet packets.
 173  */
 174 static inline int is_ofld_imm(const struct sk_buff *skb)
 175 {
 176         return skb->len <= (MAX_IMM_TX_PKT_LEN -
 177                         sizeof(struct fw_ofld_tx_data_wr));
 178 }
 179
 180 static void send_act_open_req(struct cxgbi_sock *csk, struct sk_buff *skb,
 181                                 struct l2t_entry *e)
 182 {
 183         struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev);
 184         int t4 = is_t4(lldi->adapter_type);
 185         int wscale = cxgbi_sock_compute_wscale(csk->mss_idx);
 186         unsigned long long opt0;
 187         unsigned int opt2;
 188         unsigned int qid_atid = ((unsigned int)csk->atid) |
 189                                  (((unsigned int)csk->rss_qid) << 14);
 190
 191         opt0 = KEEP_ALIVE(1) |
 192                 WND_SCALE(wscale) |
 193                 MSS_IDX(csk->mss_idx) |
 194                 L2T_IDX(((struct l2t_entry *)csk->l2t)->idx) |
 195                 TX_CHAN(csk->tx_chan) |
 196                 SMAC_SEL(csk->smac_idx) |
 197                 ULP_MODE(ULP_MODE_ISCSI) |
 198                 RCV_BUFSIZ(cxgb4i_rcv_win >> 10);
 199         opt2 = RX_CHANNEL(0) |
 200                 RSS_QUEUE_VALID |
 201                 (1 << 20) |
 202                 RSS_QUEUE(csk->rss_qid);
 203
 204         if (is_t4(lldi->adapter_type)) {
 205                 struct cpl_act_open_req *req =
 206                                 (struct cpl_act_open_req *)skb->head;
 207
 208                 INIT_TP_WR(req, 0);
 209                 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ,
 210                                         qid_atid));
 211                 req->local_port = csk->saddr.sin_port;
 212                 req->peer_port = csk->daddr.sin_port;
 213                 req->local_ip = csk->saddr.sin_addr.s_addr;
 214                 req->peer_ip = csk->daddr.sin_addr.s_addr;
 215                 req->opt0 = cpu_to_be64(opt0);
 216                 req->params = cpu_to_be32(cxgb4_select_ntuple(
 217                                         csk->cdev->ports[csk->port_id],
 218                                         csk->l2t));
 219                 opt2 |= 1 << 22;
 220                 req->opt2 = cpu_to_be32(opt2);
 221
 222                 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
 223                         "csk t4 0x%p, %pI4:%u-%pI4:%u, atid %d, qid %u.\n",
 224                         csk, &req->local_ip, ntohs(req->local_port),
 225                         &req->peer_ip, ntohs(req->peer_port),
 226                         csk->atid, csk->rss_qid);
 227         } else {
 228                 struct cpl_t5_act_open_req *req =
 229                                 (struct cpl_t5_act_open_req *)skb->head;
 230
 231                 INIT_TP_WR(req, 0);
 232                 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ,
 233                                         qid_atid));
 234                 req->local_port = csk->saddr.sin_port;
 235                 req->peer_port = csk->daddr.sin_port;
 236                 req->local_ip = csk->saddr.sin_addr.s_addr;
 237                 req->peer_ip = csk->daddr.sin_addr.s_addr;
 238                 req->opt0 = cpu_to_be64(opt0);
 239                 req->params = cpu_to_be64(V_FILTER_TUPLE(
 240                                 cxgb4_select_ntuple(
 241                                         csk->cdev->ports[csk->port_id],
 242                                         csk->l2t)));
 243                 opt2 |= 1 << 31;
 244                 req->opt2 = cpu_to_be32(opt2);
 245
 246                 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
 247                         "csk t5 0x%p, %pI4:%u-%pI4:%u, atid %d, qid %u.\n",
 248                         csk, &req->local_ip, ntohs(req->local_port),
 249                         &req->peer_ip, ntohs(req->peer_port),
 250                         csk->atid, csk->rss_qid);
 251         }
 252
 253         set_wr_txq(skb, CPL_PRIORITY_SETUP, csk->port_id);
 254
 255         pr_info_ipaddr("t%d csk 0x%p,%u,0x%lx,%u, rss_qid %u.\n",
 256                        (&csk->saddr), (&csk->daddr), t4 ? 4 : 5, csk,
 257                        csk->state, csk->flags, csk->atid, csk->rss_qid);
 258
 259         cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t);
 260 }
 261
 262 #if IS_ENABLED(CONFIG_IPV6)
 263 static void send_act_open_req6(struct cxgbi_sock *csk, struct sk_buff *skb,
 264                                struct l2t_entry *e)
 265 {
 266         struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev);
 267         int t4 = is_t4(lldi->adapter_type);
 268         int wscale = cxgbi_sock_compute_wscale(csk->mss_idx);
 269         unsigned long long opt0;
 270         unsigned int opt2;
 271         unsigned int qid_atid = ((unsigned int)csk->atid) |
 272                                  (((unsigned int)csk->rss_qid) << 14);
 273
 274         opt0 = KEEP_ALIVE(1) |
 275                 WND_SCALE(wscale) |
 276                 MSS_IDX(csk->mss_idx) |
 277                 L2T_IDX(((struct l2t_entry *)csk->l2t)->idx) |
 278                 TX_CHAN(csk->tx_chan) |
 279                 SMAC_SEL(csk->smac_idx) |
 280                 ULP_MODE(ULP_MODE_ISCSI) |
 281                 RCV_BUFSIZ(cxgb4i_rcv_win >> 10);
 282
 283         opt2 = RX_CHANNEL(0) |
 284                 RSS_QUEUE_VALID |
 285                 RX_FC_DISABLE |
 286                 RSS_QUEUE(csk->rss_qid);
 287
 288         if (t4) {
 289                 struct cpl_act_open_req6 *req =
 290                             (struct cpl_act_open_req6 *)skb->head;
 291
 292                 INIT_TP_WR(req, 0);
 293                 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ6,
 294                                                             qid_atid));
 295                 req->local_port = csk->saddr6.sin6_port;
 296                 req->peer_port = csk->daddr6.sin6_port;
 297
 298                 req->local_ip_hi = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr);
 299                 req->local_ip_lo = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr +
 300                                                                     8);
 301                 req->peer_ip_hi = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr);
 302                 req->peer_ip_lo = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr +
 303                                                                     8);
 304
 305                 req->opt0 = cpu_to_be64(opt0);
 306
 307                 opt2 |= RX_FC_VALID;
 308                 req->opt2 = cpu_to_be32(opt2);
 309
 310                 req->params = cpu_to_be32(cxgb4_select_ntuple(
 311                                           csk->cdev->ports[csk->port_id],
 312                                           csk->l2t));
 313         } else {
 314                 struct cpl_t5_act_open_req6 *req =
 315                                 (struct cpl_t5_act_open_req6 *)skb->head;
 316
 317                 INIT_TP_WR(req, 0);
 318                 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ6,
 319                                                             qid_atid));
 320                 req->local_port = csk->saddr6.sin6_port;
 321                 req->peer_port = csk->daddr6.sin6_port;
 322                 req->local_ip_hi = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr);
 323                 req->local_ip_lo = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr +
 324                                                                         8);
 325                 req->peer_ip_hi = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr);
 326                 req->peer_ip_lo = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr +
 327                                                                         8);
 328                 req->opt0 = cpu_to_be64(opt0);
 329
 330                 opt2 |= T5_OPT_2_VALID;
 331                 req->opt2 = cpu_to_be32(opt2);
 332
 333                 req->params = cpu_to_be64(V_FILTER_TUPLE(cxgb4_select_ntuple(
 334                                           csk->cdev->ports[csk->port_id],
 335                                           csk->l2t)));
 336         }
 337
 338         set_wr_txq(skb, CPL_PRIORITY_SETUP, csk->port_id);
 339
 340         pr_info("t%d csk 0x%p,%u,0x%lx,%u, [%pI6]:%u-[%pI6]:%u, rss_qid %u.\n",
 341                 t4 ? 4 : 5, csk, csk->state, csk->flags, csk->atid,
 342                 &csk->saddr6.sin6_addr, ntohs(csk->saddr.sin_port),
 343                 &csk->daddr6.sin6_addr, ntohs(csk->daddr.sin_port),
 344                 csk->rss_qid);
 345
 346         cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t);
 347 }
 348 #endif
 349
 350 static void send_close_req(struct cxgbi_sock *csk)
 351 {
 352         struct sk_buff *skb = csk->cpl_close;
 353         struct cpl_close_con_req *req = (struct cpl_close_con_req *)skb->head;
 354         unsigned int tid = csk->tid;
 355
 356         log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
 357                 "csk 0x%p,%u,0x%lx, tid %u.\n",
 358                 csk, csk->state, csk->flags, csk->tid);
 359         csk->cpl_close = NULL;
 360         set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id);
 361         INIT_TP_WR(req, tid);
 362         OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_CLOSE_CON_REQ, tid));
 363         req->rsvd = 0;
 364
 365         cxgbi_sock_skb_entail(csk, skb);
 366         if (csk->state >= CTP_ESTABLISHED)
 367                 push_tx_frames(csk, 1);
 368 }
 369
 370 static void abort_arp_failure(void *handle, struct sk_buff *skb)
 371 {
 372         struct cxgbi_sock *csk = (struct cxgbi_sock *)handle;
 373         struct cpl_abort_req *req;
 374
 375         log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
 376                 "csk 0x%p,%u,0x%lx, tid %u, abort.\n",
 377                 csk, csk->state, csk->flags, csk->tid);
 378         req = (struct cpl_abort_req *)skb->data;
 379         req->cmd = CPL_ABORT_NO_RST;
 380         cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
 381 }
 382
 383 static void send_abort_req(struct cxgbi_sock *csk)
 384 {
 385         struct cpl_abort_req *req;
 386         struct sk_buff *skb = csk->cpl_abort_req;
 387
 388         if (unlikely(csk->state == CTP_ABORTING) || !skb || !csk->cdev)
 389                 return;
 390         cxgbi_sock_set_state(csk, CTP_ABORTING);
 391         cxgbi_sock_set_flag(csk, CTPF_ABORT_RPL_PENDING);
 392         cxgbi_sock_purge_write_queue(csk);
 393
 394         csk->cpl_abort_req = NULL;
 395         req = (struct cpl_abort_req *)skb->head;
 396         set_queue(skb, CPL_PRIORITY_DATA, csk);
 397         req->cmd = CPL_ABORT_SEND_RST;
 398         t4_set_arp_err_handler(skb, csk, abort_arp_failure);
 399         INIT_TP_WR(req, csk->tid);
 400         OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_REQ, csk->tid));
 401         req->rsvd0 = htonl(csk->snd_nxt);
 402         req->rsvd1 = !cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT);
 403
 404         log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
 405                 "csk 0x%p,%u,0x%lx,%u, snd_nxt %u, 0x%x.\n",
 406                 csk, csk->state, csk->flags, csk->tid, csk->snd_nxt,
 407                 req->rsvd1);
 408
 409         cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t);
 410 }
 411
 412 static void send_abort_rpl(struct cxgbi_sock *csk, int rst_status)
 413 {
 414         struct sk_buff *skb = csk->cpl_abort_rpl;
 415         struct cpl_abort_rpl *rpl = (struct cpl_abort_rpl *)skb->head;
 416
 417         log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
 418                 "csk 0x%p,%u,0x%lx,%u, status %d.\n",
 419                 csk, csk->state, csk->flags, csk->tid, rst_status);
 420
 421         csk->cpl_abort_rpl = NULL;
 422         set_queue(skb, CPL_PRIORITY_DATA, csk);
 423         INIT_TP_WR(rpl, csk->tid);
 424         OPCODE_TID(rpl) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_RPL, csk->tid));
 425         rpl->cmd = rst_status;
 426         cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
 427 }
 428
 429 /*
 430  * CPL connection rx data ack: host ->
 431  * Send RX credits through an RX_DATA_ACK CPL message. Returns the number of
 432  * credits sent.
 433  */
 434 static u32 send_rx_credits(struct cxgbi_sock *csk, u32 credits)
 435 {
 436         struct sk_buff *skb;
 437         struct cpl_rx_data_ack *req;
 438
 439         log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
 440                 "csk 0x%p,%u,0x%lx,%u, credit %u.\n",
 441                 csk, csk->state, csk->flags, csk->tid, credits);
 442
 443         skb = alloc_wr(sizeof(*req), 0, GFP_ATOMIC);
 444         if (!skb) {
 445                 pr_info("csk 0x%p, credit %u, OOM.\n", csk, credits);
 446                 return 0;
 447         }
 448         req = (struct cpl_rx_data_ack *)skb->head;
 449
 450         set_wr_txq(skb, CPL_PRIORITY_ACK, csk->port_id);
 451         INIT_TP_WR(req, csk->tid);
 452         OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_RX_DATA_ACK,
 453                                       csk->tid));
 454         req->credit_dack = cpu_to_be32(RX_CREDITS(credits) | RX_FORCE_ACK(1));
 455         cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
 456         return credits;
 457 }
 458
 459 /*
 460  * sgl_len - calculates the size of an SGL of the given capacity
 461  * @n: the number of SGL entries
 462  * Calculates the number of flits needed for a scatter/gather list that
 463  * can hold the given number of entries.
 464  */
 465 static inline unsigned int sgl_len(unsigned int n)
 466 {
 467         n--;
 468         return (3 * n) / 2 + (n & 1) + 2;
 469 }
 470
 471 /*
 472  * calc_tx_flits_ofld - calculate # of flits for an offload packet
 473  * @skb: the packet
 474  *
 475  * Returns the number of flits needed for the given offload packet.
 476  * These packets are already fully constructed and no additional headers
 477  * will be added.
 478  */
 479 static inline unsigned int calc_tx_flits_ofld(const struct sk_buff *skb)
 480 {
 481         unsigned int flits, cnt;
 482
 483         if (is_ofld_imm(skb))
 484                 return DIV_ROUND_UP(skb->len, 8);
 485         flits = skb_transport_offset(skb) / 8;
 486         cnt = skb_shinfo(skb)->nr_frags;
 487         if (skb_tail_pointer(skb) != skb_transport_header(skb))
 488                 cnt++;
 489         return flits + sgl_len(cnt);
 490 }
 491
 492 static inline void send_tx_flowc_wr(struct cxgbi_sock *csk)
 493 {
 494         struct sk_buff *skb;
 495         struct fw_flowc_wr *flowc;
 496         int flowclen, i;
 497
 498         flowclen = 80;
 499         skb = alloc_wr(flowclen, 0, GFP_ATOMIC);
 500         flowc = (struct fw_flowc_wr *)skb->head;
 501         flowc->op_to_nparams =
 502                 htonl(FW_WR_OP_V(FW_FLOWC_WR) | FW_FLOWC_WR_NPARAMS_V(8));
 503         flowc->flowid_len16 =
 504                 htonl(FW_WR_LEN16_V(DIV_ROUND_UP(72, 16)) |
 505                                 FW_WR_FLOWID_V(csk->tid));
 506         flowc->mnemval[0].mnemonic = FW_FLOWC_MNEM_PFNVFN;
 507         flowc->mnemval[0].val = htonl(csk->cdev->pfvf);
 508         flowc->mnemval[1].mnemonic = FW_FLOWC_MNEM_CH;
 509         flowc->mnemval[1].val = htonl(csk->tx_chan);
 510         flowc->mnemval[2].mnemonic = FW_FLOWC_MNEM_PORT;
 511         flowc->mnemval[2].val = htonl(csk->tx_chan);
 512         flowc->mnemval[3].mnemonic = FW_FLOWC_MNEM_IQID;
 513         flowc->mnemval[3].val = htonl(csk->rss_qid);
 514         flowc->mnemval[4].mnemonic = FW_FLOWC_MNEM_SNDNXT;
 515         flowc->mnemval[4].val = htonl(csk->snd_nxt);
 516         flowc->mnemval[5].mnemonic = FW_FLOWC_MNEM_RCVNXT;
 517         flowc->mnemval[5].val = htonl(csk->rcv_nxt);
 518         flowc->mnemval[6].mnemonic = FW_FLOWC_MNEM_SNDBUF;
 519         flowc->mnemval[6].val = htonl(cxgb4i_snd_win);
 520         flowc->mnemval[7].mnemonic = FW_FLOWC_MNEM_MSS;
 521         flowc->mnemval[7].val = htonl(csk->advmss);
 522         flowc->mnemval[8].mnemonic = 0;
 523         flowc->mnemval[8].val = 0;
 524         for (i = 0; i < 9; i++) {
 525                 flowc->mnemval[i].r4[0] = 0;
 526                 flowc->mnemval[i].r4[1] = 0;
 527                 flowc->mnemval[i].r4[2] = 0;
 528         }
 529         set_queue(skb, CPL_PRIORITY_DATA, csk);
 530
 531         log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
 532                 "csk 0x%p, tid 0x%x, %u,%u,%u,%u,%u,%u,%u.\n",
 533                 csk, csk->tid, 0, csk->tx_chan, csk->rss_qid,
 534                 csk->snd_nxt, csk->rcv_nxt, cxgb4i_snd_win,
 535                 csk->advmss);
 536
 537         cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
 538 }
 539
 540 static inline void make_tx_data_wr(struct cxgbi_sock *csk, struct sk_buff *skb,
 541                                    int dlen, int len, u32 credits, int compl)
 542 {
 543         struct fw_ofld_tx_data_wr *req;
 544         unsigned int submode = cxgbi_skcb_ulp_mode(skb) & 3;
 545         unsigned int wr_ulp_mode = 0, val;
 546
 547         req = (struct fw_ofld_tx_data_wr *)__skb_push(skb, sizeof(*req));
 548
 549         if (is_ofld_imm(skb)) {
 550                 req->op_to_immdlen = htonl(FW_WR_OP_V(FW_OFLD_TX_DATA_WR) |
 551                                         FW_WR_COMPL_F |
 552                                         FW_WR_IMMDLEN_V(dlen));
 553                 req->flowid_len16 = htonl(FW_WR_FLOWID_V(csk->tid) |
 554                                                 FW_WR_LEN16_V(credits));
 555         } else {
 556                 req->op_to_immdlen =
 557                         cpu_to_be32(FW_WR_OP_V(FW_OFLD_TX_DATA_WR) |
 558                                         FW_WR_COMPL_F |
 559                                         FW_WR_IMMDLEN_V(0));
 560                 req->flowid_len16 =
 561                         cpu_to_be32(FW_WR_FLOWID_V(csk->tid) |
 562                                         FW_WR_LEN16_V(credits));
 563         }
 564         if (submode)
 565                 wr_ulp_mode = FW_OFLD_TX_DATA_WR_ULPMODE_V(ULP2_MODE_ISCSI) |
 566                                 FW_OFLD_TX_DATA_WR_ULPSUBMODE_V(submode);
 567         val = skb_peek(&csk->write_queue) ? 0 : 1;
 568         req->tunnel_to_proxy = htonl(wr_ulp_mode |
 569                                      FW_OFLD_TX_DATA_WR_SHOVE_V(val));
 570         req->plen = htonl(len);
 571         if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT))
 572                 cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT);
 573 }
 574
 575 static void arp_failure_skb_discard(void *handle, struct sk_buff *skb)
 576 {
 577         kfree_skb(skb);
 578 }
 579
 580 static int push_tx_frames(struct cxgbi_sock *csk, int req_completion)
 581 {
 582         int total_size = 0;
 583         struct sk_buff *skb;
 584
 585         if (unlikely(csk->state < CTP_ESTABLISHED ||
 586                 csk->state == CTP_CLOSE_WAIT_1 || csk->state >= CTP_ABORTING)) {
 587                 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK |
 588                          1 << CXGBI_DBG_PDU_TX,
 589                         "csk 0x%p,%u,0x%lx,%u, in closing state.\n",
 590                         csk, csk->state, csk->flags, csk->tid);
 591                 return 0;
 592         }
 593
 594         while (csk->wr_cred && (skb = skb_peek(&csk->write_queue)) != NULL) {
 595                 int dlen = skb->len;
 596                 int len = skb->len;
 597                 unsigned int credits_needed;
 598
 599                 skb_reset_transport_header(skb);
 600                 if (is_ofld_imm(skb))
 601                         credits_needed = DIV_ROUND_UP(dlen +
 602                                         sizeof(struct fw_ofld_tx_data_wr), 16);
 603                 else
 604                         credits_needed = DIV_ROUND_UP(8*calc_tx_flits_ofld(skb)
 605                                         + sizeof(struct fw_ofld_tx_data_wr),
 606                                         16);
 607
 608                 if (csk->wr_cred < credits_needed) {
 609                         log_debug(1 << CXGBI_DBG_PDU_TX,
 610                                 "csk 0x%p, skb %u/%u, wr %d < %u.\n",
 611                                 csk, skb->len, skb->data_len,
 612                                 credits_needed, csk->wr_cred);
 613                         break;
 614                 }
 615                 __skb_unlink(skb, &csk->write_queue);
 616                 set_queue(skb, CPL_PRIORITY_DATA, csk);
 617                 skb->csum = credits_needed;
 618                 csk->wr_cred -= credits_needed;
 619                 csk->wr_una_cred += credits_needed;
 620                 cxgbi_sock_enqueue_wr(csk, skb);
 621
 622                 log_debug(1 << CXGBI_DBG_PDU_TX,
 623                         "csk 0x%p, skb %u/%u, wr %d, left %u, unack %u.\n",
 624                         csk, skb->len, skb->data_len, credits_needed,
 625                         csk->wr_cred, csk->wr_una_cred);
 626
 627                 if (likely(cxgbi_skcb_test_flag(skb, SKCBF_TX_NEED_HDR))) {
 628                         if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT)) {
 629                                 send_tx_flowc_wr(csk);
 630                                 skb->csum += 5;
 631                                 csk->wr_cred -= 5;
 632                                 csk->wr_una_cred += 5;
 633                         }
 634                         len += cxgbi_ulp_extra_len(cxgbi_skcb_ulp_mode(skb));
 635                         make_tx_data_wr(csk, skb, dlen, len, credits_needed,
 636                                         req_completion);
 637                         csk->snd_nxt += len;
 638                         cxgbi_skcb_clear_flag(skb, SKCBF_TX_NEED_HDR);
 639                 }
 640                 total_size += skb->truesize;
 641                 t4_set_arp_err_handler(skb, csk, arp_failure_skb_discard);
 642
 643                 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_TX,
 644                         "csk 0x%p,%u,0x%lx,%u, skb 0x%p, %u.\n",
 645                         csk, csk->state, csk->flags, csk->tid, skb, len);
 646
 647                 cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t);
 648         }
 649         return total_size;
 650 }
 651
 652 static inline void free_atid(struct cxgbi_sock *csk)
 653 {
 654         struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev);
 655
 656         if (cxgbi_sock_flag(csk, CTPF_HAS_ATID)) {
 657                 cxgb4_free_atid(lldi->tids, csk->atid);
 658                 cxgbi_sock_clear_flag(csk, CTPF_HAS_ATID);
 659                 cxgbi_sock_put(csk);
 660         }
 661 }
 662
 663 static void do_act_establish(struct cxgbi_device *cdev, struct sk_buff *skb)
 664 {
 665         struct cxgbi_sock *csk;
 666         struct cpl_act_establish *req = (struct cpl_act_establish *)skb->data;
 667         unsigned short tcp_opt = ntohs(req->tcp_opt);
 668         unsigned int tid = GET_TID(req);
 669         unsigned int atid = GET_TID_TID(ntohl(req->tos_atid));
 670         struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
 671         struct tid_info *t = lldi->tids;
 672         u32 rcv_isn = be32_to_cpu(req->rcv_isn);
 673
 674         csk = lookup_atid(t, atid);
 675         if (unlikely(!csk)) {
 676                 pr_err("NO conn. for atid %u, cdev 0x%p.\n", atid, cdev);
 677                 goto rel_skb;
 678         }
 679
 680         if (csk->atid != atid) {
 681                 pr_err("bad conn atid %u, csk 0x%p,%u,0x%lx,tid %u, atid %u.\n",
 682                         atid, csk, csk->state, csk->flags, csk->tid, csk->atid);
 683                 goto rel_skb;
 684         }
 685
 686         pr_info_ipaddr("atid 0x%x, tid 0x%x, csk 0x%p,%u,0x%lx, isn %u.\n",
 687                        (&csk->saddr), (&csk->daddr),
 688                        atid, tid, csk, csk->state, csk->flags, rcv_isn);
 689
 690         module_put(THIS_MODULE);
 691
 692         cxgbi_sock_get(csk);
 693         csk->tid = tid;
 694         cxgb4_insert_tid(lldi->tids, csk, tid);
 695         cxgbi_sock_set_flag(csk, CTPF_HAS_TID);
 696
 697         free_atid(csk);
 698
 699         spin_lock_bh(&csk->lock);
 700         if (unlikely(csk->state != CTP_ACTIVE_OPEN))
 701                 pr_info("csk 0x%p,%u,0x%lx,%u, got EST.\n",
 702                         csk, csk->state, csk->flags, csk->tid);
 703
 704         if (csk->retry_timer.function) {
 705                 del_timer(&csk->retry_timer);
 706                 csk->retry_timer.function = NULL;
 707         }
 708
 709         csk->copied_seq = csk->rcv_wup = csk->rcv_nxt = rcv_isn;
 710         /*
 711          * Causes the first RX_DATA_ACK to supply any Rx credits we couldn't
 712          * pass through opt0.
 713          */
 714         if (cxgb4i_rcv_win > (RCV_BUFSIZ_MASK << 10))
 715                 csk->rcv_wup -= cxgb4i_rcv_win - (RCV_BUFSIZ_MASK << 10);
 716
 717         csk->advmss = lldi->mtus[GET_TCPOPT_MSS(tcp_opt)] - 40;
 718         if (GET_TCPOPT_TSTAMP(tcp_opt))
 719                 csk->advmss -= 12;
 720         if (csk->advmss < 128)
 721                 csk->advmss = 128;
 722
 723         log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
 724                 "csk 0x%p, mss_idx %u, advmss %u.\n",
 725                         csk, GET_TCPOPT_MSS(tcp_opt), csk->advmss);
 726
 727         cxgbi_sock_established(csk, ntohl(req->snd_isn), ntohs(req->tcp_opt));
 728
 729         if (unlikely(cxgbi_sock_flag(csk, CTPF_ACTIVE_CLOSE_NEEDED)))
 730                 send_abort_req(csk);
 731         else {
 732                 if (skb_queue_len(&csk->write_queue))
 733                         push_tx_frames(csk, 0);
 734                 cxgbi_conn_tx_open(csk);
 735         }
 736         spin_unlock_bh(&csk->lock);
 737
 738 rel_skb:
 739         __kfree_skb(skb);
 740 }
 741
 742 static int act_open_rpl_status_to_errno(int status)
 743 {
 744         switch (status) {
 745         case CPL_ERR_CONN_RESET:
 746                 return -ECONNREFUSED;
 747         case CPL_ERR_ARP_MISS:
 748                 return -EHOSTUNREACH;
 749         case CPL_ERR_CONN_TIMEDOUT:
 750                 return -ETIMEDOUT;
 751         case CPL_ERR_TCAM_FULL:
 752                 return -ENOMEM;
 753         case CPL_ERR_CONN_EXIST:
 754                 return -EADDRINUSE;
 755         default:
 756                 return -EIO;
 757         }
 758 }
 759
 760 static void csk_act_open_retry_timer(unsigned long data)
 761 {
 762         struct sk_buff *skb = NULL;
 763         struct cxgbi_sock *csk = (struct cxgbi_sock *)data;
 764         struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev);
 765         void (*send_act_open_func)(struct cxgbi_sock *, struct sk_buff *,
 766                                    struct l2t_entry *);
 767         int t4 = is_t4(lldi->adapter_type), size, size6;
 768
 769         log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
 770                 "csk 0x%p,%u,0x%lx,%u.\n",
 771                 csk, csk->state, csk->flags, csk->tid);
 772
 773         cxgbi_sock_get(csk);
 774         spin_lock_bh(&csk->lock);
 775
 776         if (t4) {
 777                 size = sizeof(struct cpl_act_open_req);
 778                 size6 = sizeof(struct cpl_act_open_req6);
 779         } else {
 780                 size = sizeof(struct cpl_t5_act_open_req);
 781                 size6 = sizeof(struct cpl_t5_act_open_req6);
 782         }
 783
 784         if (csk->csk_family == AF_INET) {
 785                 send_act_open_func = send_act_open_req;
 786                 skb = alloc_wr(size, 0, GFP_ATOMIC);
 787 #if IS_ENABLED(CONFIG_IPV6)
 788         } else {
 789                 send_act_open_func = send_act_open_req6;
 790                 skb = alloc_wr(size6, 0, GFP_ATOMIC);
 791 #endif
 792         }
 793
 794         if (!skb)
 795                 cxgbi_sock_fail_act_open(csk, -ENOMEM);
 796         else {
 797                 skb->sk = (struct sock *)csk;
 798                 t4_set_arp_err_handler(skb, csk,
 799                                        cxgbi_sock_act_open_req_arp_failure);
 800                 send_act_open_func(csk, skb, csk->l2t);
 801         }
 802
 803         spin_unlock_bh(&csk->lock);
 804         cxgbi_sock_put(csk);
 805
 806 }
 807
 808 static void do_act_open_rpl(struct cxgbi_device *cdev, struct sk_buff *skb)
 809 {
 810         struct cxgbi_sock *csk;
 811         struct cpl_act_open_rpl *rpl = (struct cpl_act_open_rpl *)skb->data;
 812         unsigned int tid = GET_TID(rpl);
 813         unsigned int atid =
 814                 GET_TID_TID(GET_AOPEN_ATID(be32_to_cpu(rpl->atid_status)));
 815         unsigned int status = GET_AOPEN_STATUS(be32_to_cpu(rpl->atid_status));
 816         struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
 817         struct tid_info *t = lldi->tids;
 818
 819         csk = lookup_atid(t, atid);
 820         if (unlikely(!csk)) {
 821                 pr_err("NO matching conn. atid %u, tid %u.\n", atid, tid);
 822                 goto rel_skb;
 823         }
 824
 825         pr_info_ipaddr("tid %u/%u, status %u.\n"
 826                        "csk 0x%p,%u,0x%lx. ", (&csk->saddr), (&csk->daddr),
 827                        atid, tid, status, csk, csk->state, csk->flags);
 828
 829         if (status == CPL_ERR_RTX_NEG_ADVICE)
 830                 goto rel_skb;
 831
 832         if (status && status != CPL_ERR_TCAM_FULL &&
 833             status != CPL_ERR_CONN_EXIST &&
 834             status != CPL_ERR_ARP_MISS)
 835                 cxgb4_remove_tid(lldi->tids, csk->port_id, GET_TID(rpl));
 836
 837         cxgbi_sock_get(csk);
 838         spin_lock_bh(&csk->lock);
 839
 840         if (status == CPL_ERR_CONN_EXIST &&
 841             csk->retry_timer.function != csk_act_open_retry_timer) {
 842                 csk->retry_timer.function = csk_act_open_retry_timer;
 843                 mod_timer(&csk->retry_timer, jiffies + HZ / 2);
 844         } else
 845                 cxgbi_sock_fail_act_open(csk,
 846                                         act_open_rpl_status_to_errno(status));
 847
 848         spin_unlock_bh(&csk->lock);
 849         cxgbi_sock_put(csk);
 850 rel_skb:
 851         __kfree_skb(skb);
 852 }
 853
 854 static void do_peer_close(struct cxgbi_device *cdev, struct sk_buff *skb)
 855 {
 856         struct cxgbi_sock *csk;
 857         struct cpl_peer_close *req = (struct cpl_peer_close *)skb->data;
 858         unsigned int tid = GET_TID(req);
 859         struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
 860         struct tid_info *t = lldi->tids;
 861
 862         csk = lookup_tid(t, tid);
 863         if (unlikely(!csk)) {
 864                 pr_err("can't find connection for tid %u.\n", tid);
 865                 goto rel_skb;
 866         }
 867         pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u.\n",
 868                        (&csk->saddr), (&csk->daddr),
 869                        csk, csk->state, csk->flags, csk->tid);
 870         cxgbi_sock_rcv_peer_close(csk);
 871 rel_skb:
 872         __kfree_skb(skb);
 873 }
 874
 875 static void do_close_con_rpl(struct cxgbi_device *cdev, struct sk_buff *skb)
 876 {
 877         struct cxgbi_sock *csk;
 878         struct cpl_close_con_rpl *rpl = (struct cpl_close_con_rpl *)skb->data;
 879         unsigned int tid = GET_TID(rpl);
 880         struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
 881         struct tid_info *t = lldi->tids;
 882
 883         csk = lookup_tid(t, tid);
 884         if (unlikely(!csk)) {
 885                 pr_err("can't find connection for tid %u.\n", tid);
 886                 goto rel_skb;
 887         }
 888         pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u.\n",
 889                        (&csk->saddr), (&csk->daddr),
 890                        csk, csk->state, csk->flags, csk->tid);
 891         cxgbi_sock_rcv_close_conn_rpl(csk, ntohl(rpl->snd_nxt));
 892 rel_skb:
 893         __kfree_skb(skb);
 894 }
 895
 896 static int abort_status_to_errno(struct cxgbi_sock *csk, int abort_reason,
 897                                                                 int *need_rst)
 898 {
 899         switch (abort_reason) {
 900         case CPL_ERR_BAD_SYN: /* fall through */
 901         case CPL_ERR_CONN_RESET:
 902                 return csk->state > CTP_ESTABLISHED ?
 903                         -EPIPE : -ECONNRESET;
 904         case CPL_ERR_XMIT_TIMEDOUT:
 905         case CPL_ERR_PERSIST_TIMEDOUT:
 906         case CPL_ERR_FINWAIT2_TIMEDOUT:
 907         case CPL_ERR_KEEPALIVE_TIMEDOUT:
 908                 return -ETIMEDOUT;
 909         default:
 910                 return -EIO;
 911         }
 912 }
 913
 914 static void do_abort_req_rss(struct cxgbi_device *cdev, struct sk_buff *skb)
 915 {
 916         struct cxgbi_sock *csk;
 917         struct cpl_abort_req_rss *req = (struct cpl_abort_req_rss *)skb->data;
 918         unsigned int tid = GET_TID(req);
 919         struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
 920         struct tid_info *t = lldi->tids;
 921         int rst_status = CPL_ABORT_NO_RST;
 922
 923         csk = lookup_tid(t, tid);
 924         if (unlikely(!csk)) {
 925                 pr_err("can't find connection for tid %u.\n", tid);
 926                 goto rel_skb;
 927         }
 928
 929         pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u, status %u.\n",
 930                        (&csk->saddr), (&csk->daddr),
 931                        csk, csk->state, csk->flags, csk->tid, req->status);
 932
 933         if (req->status == CPL_ERR_RTX_NEG_ADVICE ||
 934             req->status == CPL_ERR_PERSIST_NEG_ADVICE)
 935                 goto rel_skb;
 936
 937         cxgbi_sock_get(csk);
 938         spin_lock_bh(&csk->lock);
 939
 940         if (!cxgbi_sock_flag(csk, CTPF_ABORT_REQ_RCVD)) {
 941                 cxgbi_sock_set_flag(csk, CTPF_ABORT_REQ_RCVD);
 942                 cxgbi_sock_set_state(csk, CTP_ABORTING);
 943                 goto done;
 944         }
 945
 946         cxgbi_sock_clear_flag(csk, CTPF_ABORT_REQ_RCVD);
 947         send_abort_rpl(csk, rst_status);
 948
 949         if (!cxgbi_sock_flag(csk, CTPF_ABORT_RPL_PENDING)) {
 950                 csk->err = abort_status_to_errno(csk, req->status, &rst_status);
 951                 cxgbi_sock_closed(csk);
 952         }
 953 done:
 954         spin_unlock_bh(&csk->lock);
 955         cxgbi_sock_put(csk);
 956 rel_skb:
 957         __kfree_skb(skb);
 958 }
 959
 960 static void do_abort_rpl_rss(struct cxgbi_device *cdev, struct sk_buff *skb)
 961 {
 962         struct cxgbi_sock *csk;
 963         struct cpl_abort_rpl_rss *rpl = (struct cpl_abort_rpl_rss *)skb->data;
 964         unsigned int tid = GET_TID(rpl);
 965         struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
 966         struct tid_info *t = lldi->tids;
 967
 968         csk = lookup_tid(t, tid);
 969         if (!csk)
 970                 goto rel_skb;
 971
 972         if (csk)
 973                 pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u, status %u.\n",
 974                                (&csk->saddr), (&csk->daddr), csk,
 975                                csk->state, csk->flags, csk->tid, rpl->status);
 976
 977         if (rpl->status == CPL_ERR_ABORT_FAILED)
 978                 goto rel_skb;
 979
 980         cxgbi_sock_rcv_abort_rpl(csk);
 981 rel_skb:
 982         __kfree_skb(skb);
 983 }
 984
 985 static void do_rx_iscsi_hdr(struct cxgbi_device *cdev, struct sk_buff *skb)
 986 {
 987         struct cxgbi_sock *csk;
 988         struct cpl_iscsi_hdr *cpl = (struct cpl_iscsi_hdr *)skb->data;
 989         unsigned short pdu_len_ddp = be16_to_cpu(cpl->pdu_len_ddp);
 990         unsigned int tid = GET_TID(cpl);
 991         struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
 992         struct tid_info *t = lldi->tids;
 993
 994         csk = lookup_tid(t, tid);
 995         if (unlikely(!csk)) {
 996                 pr_err("can't find conn. for tid %u.\n", tid);
 997                 goto rel_skb;
 998         }
 999
1000         log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
1001                 "csk 0x%p,%u,0x%lx, tid %u, skb 0x%p,%u, 0x%x.\n",
1002                 csk, csk->state, csk->flags, csk->tid, skb, skb->len,
1003                 pdu_len_ddp);
1004
1005         spin_lock_bh(&csk->lock);
1006
1007         if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) {
1008                 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1009                         "csk 0x%p,%u,0x%lx,%u, bad state.\n",
1010                         csk, csk->state, csk->flags, csk->tid);
1011                 if (csk->state != CTP_ABORTING)
1012                         goto abort_conn;
1013                 else
1014                         goto discard;
1015         }
1016
1017         cxgbi_skcb_tcp_seq(skb) = ntohl(cpl->seq);
1018         cxgbi_skcb_flags(skb) = 0;
1019
1020         skb_reset_transport_header(skb);
1021         __skb_pull(skb, sizeof(*cpl));
1022         __pskb_trim(skb, ntohs(cpl->len));
1023
1024         if (!csk->skb_ulp_lhdr) {
1025                 unsigned char *bhs;
1026                 unsigned int hlen, dlen, plen;
1027
1028                 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
1029                         "csk 0x%p,%u,0x%lx, tid %u, skb 0x%p header.\n",
1030                         csk, csk->state, csk->flags, csk->tid, skb);
1031                 csk->skb_ulp_lhdr = skb;
1032                 cxgbi_skcb_set_flag(skb, SKCBF_RX_HDR);
1033
1034                 if (cxgbi_skcb_tcp_seq(skb) != csk->rcv_nxt) {
1035                         pr_info("tid %u, CPL_ISCSI_HDR, bad seq, 0x%x/0x%x.\n",
1036                                 csk->tid, cxgbi_skcb_tcp_seq(skb),
1037                                 csk->rcv_nxt);
1038                         goto abort_conn;
1039                 }
1040
1041                 bhs = skb->data;
1042                 hlen = ntohs(cpl->len);
1043                 dlen = ntohl(*(unsigned int *)(bhs + 4)) & 0xFFFFFF;
1044
1045                 plen = ISCSI_PDU_LEN(pdu_len_ddp);
1046                 if (is_t4(lldi->adapter_type))
1047                         plen -= 40;
1048
1049                 if ((hlen + dlen) != plen) {
1050                         pr_info("tid 0x%x, CPL_ISCSI_HDR, pdu len "
1051                                 "mismatch %u != %u + %u, seq 0x%x.\n",
1052                                 csk->tid, plen, hlen, dlen,
1053                                 cxgbi_skcb_tcp_seq(skb));
1054                         goto abort_conn;
1055                 }
1056
1057                 cxgbi_skcb_rx_pdulen(skb) = (hlen + dlen + 3) & (~0x3);
1058                 if (dlen)
1059                         cxgbi_skcb_rx_pdulen(skb) += csk->dcrc_len;
1060                 csk->rcv_nxt += cxgbi_skcb_rx_pdulen(skb);
1061
1062                 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
1063                         "csk 0x%p, skb 0x%p, 0x%x,%u+%u,0x%x,0x%x.\n",
1064                         csk, skb, *bhs, hlen, dlen,
1065                         ntohl(*((unsigned int *)(bhs + 16))),
1066                         ntohl(*((unsigned int *)(bhs + 24))));
1067
1068         } else {
1069                 struct sk_buff *lskb = csk->skb_ulp_lhdr;
1070
1071                 cxgbi_skcb_set_flag(lskb, SKCBF_RX_DATA);
1072                 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
1073                         "csk 0x%p,%u,0x%lx, skb 0x%p data, 0x%p.\n",
1074                         csk, csk->state, csk->flags, skb, lskb);
1075         }
1076
1077         __skb_queue_tail(&csk->receive_queue, skb);
1078         spin_unlock_bh(&csk->lock);
1079         return;
1080
1081 abort_conn:
1082         send_abort_req(csk);
1083 discard:
1084         spin_unlock_bh(&csk->lock);
1085 rel_skb:
1086         __kfree_skb(skb);
1087 }
1088
1089 static void do_rx_data_ddp(struct cxgbi_device *cdev,
1090                                   struct sk_buff *skb)
1091 {
1092         struct cxgbi_sock *csk;
1093         struct sk_buff *lskb;
1094         struct cpl_rx_data_ddp *rpl = (struct cpl_rx_data_ddp *)skb->data;
1095         unsigned int tid = GET_TID(rpl);
1096         struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1097         struct tid_info *t = lldi->tids;
1098         unsigned int status = ntohl(rpl->ddpvld);
1099
1100         csk = lookup_tid(t, tid);
1101         if (unlikely(!csk)) {
1102                 pr_err("can't find connection for tid %u.\n", tid);
1103                 goto rel_skb;
1104         }
1105
1106         log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
1107                 "csk 0x%p,%u,0x%lx, skb 0x%p,0x%x, lhdr 0x%p.\n",
1108                 csk, csk->state, csk->flags, skb, status, csk->skb_ulp_lhdr);
1109
1110         spin_lock_bh(&csk->lock);
1111
1112         if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) {
1113                 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1114                         "csk 0x%p,%u,0x%lx,%u, bad state.\n",
1115                         csk, csk->state, csk->flags, csk->tid);
1116                 if (csk->state != CTP_ABORTING)
1117                         goto abort_conn;
1118                 else
1119                         goto discard;
1120         }
1121
1122         if (!csk->skb_ulp_lhdr) {
1123                 pr_err("tid 0x%x, rcv RX_DATA_DDP w/o pdu bhs.\n", csk->tid);
1124                 goto abort_conn;
1125         }
1126
1127         lskb = csk->skb_ulp_lhdr;
1128         csk->skb_ulp_lhdr = NULL;
1129
1130         cxgbi_skcb_rx_ddigest(lskb) = ntohl(rpl->ulp_crc);
1131
1132         if (ntohs(rpl->len) != cxgbi_skcb_rx_pdulen(lskb))
1133                 pr_info("tid 0x%x, RX_DATA_DDP pdulen %u != %u.\n",
1134                         csk->tid, ntohs(rpl->len), cxgbi_skcb_rx_pdulen(lskb));
1135
1136         if (status & (1 << CPL_RX_DDP_STATUS_HCRC_SHIFT)) {
1137                 pr_info("csk 0x%p, lhdr 0x%p, status 0x%x, hcrc bad 0x%lx.\n",
1138                         csk, lskb, status, cxgbi_skcb_flags(lskb));
1139                 cxgbi_skcb_set_flag(lskb, SKCBF_RX_HCRC_ERR);
1140         }
1141         if (status & (1 << CPL_RX_DDP_STATUS_DCRC_SHIFT)) {
1142                 pr_info("csk 0x%p, lhdr 0x%p, status 0x%x, dcrc bad 0x%lx.\n",
1143                         csk, lskb, status, cxgbi_skcb_flags(lskb));
1144                 cxgbi_skcb_set_flag(lskb, SKCBF_RX_DCRC_ERR);
1145         }
1146         if (status & (1 << CPL_RX_DDP_STATUS_PAD_SHIFT)) {
1147                 log_debug(1 << CXGBI_DBG_PDU_RX,
1148                         "csk 0x%p, lhdr 0x%p, status 0x%x, pad bad.\n",
1149                         csk, lskb, status);
1150                 cxgbi_skcb_set_flag(lskb, SKCBF_RX_PAD_ERR);
1151         }
1152         if ((status & (1 << CPL_RX_DDP_STATUS_DDP_SHIFT)) &&
1153                 !cxgbi_skcb_test_flag(lskb, SKCBF_RX_DATA)) {
1154                 log_debug(1 << CXGBI_DBG_PDU_RX,
1155                         "csk 0x%p, lhdr 0x%p, 0x%x, data ddp'ed.\n",
1156                         csk, lskb, status);
1157                 cxgbi_skcb_set_flag(lskb, SKCBF_RX_DATA_DDPD);
1158         }
1159         log_debug(1 << CXGBI_DBG_PDU_RX,
1160                 "csk 0x%p, lskb 0x%p, f 0x%lx.\n",
1161                 csk, lskb, cxgbi_skcb_flags(lskb));
1162
1163         cxgbi_skcb_set_flag(lskb, SKCBF_RX_STATUS);
1164         cxgbi_conn_pdu_ready(csk);
1165         spin_unlock_bh(&csk->lock);
1166         goto rel_skb;
1167
1168 abort_conn:
1169         send_abort_req(csk);
1170 discard:
1171         spin_unlock_bh(&csk->lock);
1172 rel_skb:
1173         __kfree_skb(skb);
1174 }
1175
1176 static void do_fw4_ack(struct cxgbi_device *cdev, struct sk_buff *skb)
1177 {
1178         struct cxgbi_sock *csk;
1179         struct cpl_fw4_ack *rpl = (struct cpl_fw4_ack *)skb->data;
1180         unsigned int tid = GET_TID(rpl);
1181         struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1182         struct tid_info *t = lldi->tids;
1183
1184         csk = lookup_tid(t, tid);
1185         if (unlikely(!csk))
1186                 pr_err("can't find connection for tid %u.\n", tid);
1187         else {
1188                 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1189                         "csk 0x%p,%u,0x%lx,%u.\n",
1190                         csk, csk->state, csk->flags, csk->tid);
1191                 cxgbi_sock_rcv_wr_ack(csk, rpl->credits, ntohl(rpl->snd_una),
1192                                         rpl->seq_vld);
1193         }
1194         __kfree_skb(skb);
1195 }
1196
1197 static void do_set_tcb_rpl(struct cxgbi_device *cdev, struct sk_buff *skb)
1198 {
1199         struct cpl_set_tcb_rpl *rpl = (struct cpl_set_tcb_rpl *)skb->data;
1200         unsigned int tid = GET_TID(rpl);
1201         struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1202         struct tid_info *t = lldi->tids;
1203         struct cxgbi_sock *csk;
1204
1205         csk = lookup_tid(t, tid);
1206         if (!csk)
1207                 pr_err("can't find conn. for tid %u.\n", tid);
1208
1209         log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1210                 "csk 0x%p,%u,%lx,%u, status 0x%x.\n",
1211                 csk, csk->state, csk->flags, csk->tid, rpl->status);
1212
1213         if (rpl->status != CPL_ERR_NONE)
1214                 pr_err("csk 0x%p,%u, SET_TCB_RPL status %u.\n",
1215                         csk, tid, rpl->status);
1216
1217         __kfree_skb(skb);
1218 }
1219
1220 static int alloc_cpls(struct cxgbi_sock *csk)
1221 {
1222         csk->cpl_close = alloc_wr(sizeof(struct cpl_close_con_req),
1223                                         0, GFP_KERNEL);
1224         if (!csk->cpl_close)
1225                 return -ENOMEM;
1226
1227         csk->cpl_abort_req = alloc_wr(sizeof(struct cpl_abort_req),
1228                                         0, GFP_KERNEL);
1229         if (!csk->cpl_abort_req)
1230                 goto free_cpls;
1231
1232         csk->cpl_abort_rpl = alloc_wr(sizeof(struct cpl_abort_rpl),
1233                                         0, GFP_KERNEL);
1234         if (!csk->cpl_abort_rpl)
1235                 goto free_cpls;
1236         return 0;
1237
1238 free_cpls:
1239         cxgbi_sock_free_cpl_skbs(csk);
1240         return -ENOMEM;
1241 }
1242
1243 static inline void l2t_put(struct cxgbi_sock *csk)
1244 {
1245         if (csk->l2t) {
1246                 cxgb4_l2t_release(csk->l2t);
1247                 csk->l2t = NULL;
1248                 cxgbi_sock_put(csk);
1249         }
1250 }
1251
1252 static void release_offload_resources(struct cxgbi_sock *csk)
1253 {
1254         struct cxgb4_lld_info *lldi;
1255
1256         log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1257                 "csk 0x%p,%u,0x%lx,%u.\n",
1258                 csk, csk->state, csk->flags, csk->tid);
1259
1260         cxgbi_sock_free_cpl_skbs(csk);
1261         if (csk->wr_cred != csk->wr_max_cred) {
1262                 cxgbi_sock_purge_wr_queue(csk);
1263                 cxgbi_sock_reset_wr_list(csk);
1264         }
1265
1266         l2t_put(csk);
1267         if (cxgbi_sock_flag(csk, CTPF_HAS_ATID))
1268                 free_atid(csk);
1269         else if (cxgbi_sock_flag(csk, CTPF_HAS_TID)) {
1270                 lldi = cxgbi_cdev_priv(csk->cdev);
1271                 cxgb4_remove_tid(lldi->tids, 0, csk->tid);
1272                 cxgbi_sock_clear_flag(csk, CTPF_HAS_TID);
1273                 cxgbi_sock_put(csk);
1274         }
1275         csk->dst = NULL;
1276         csk->cdev = NULL;
1277 }
1278
1279 static int init_act_open(struct cxgbi_sock *csk)
1280 {
1281         struct cxgbi_device *cdev = csk->cdev;
1282         struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1283         struct net_device *ndev = cdev->ports[csk->port_id];
1284         struct sk_buff *skb = NULL;
1285         struct neighbour *n = NULL;
1286         void *daddr;
1287         unsigned int step;
1288         unsigned int size, size6;
1289         int t4 = is_t4(lldi->adapter_type);
1290
1291         log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1292                 "csk 0x%p,%u,0x%lx,%u.\n",
1293                 csk, csk->state, csk->flags, csk->tid);
1294
1295         if (csk->csk_family == AF_INET)
1296                 daddr = &csk->daddr.sin_addr.s_addr;
1297 #if IS_ENABLED(CONFIG_IPV6)
1298         else if (csk->csk_family == AF_INET6)
1299                 daddr = &csk->daddr6.sin6_addr;
1300 #endif
1301         else {
1302                 pr_err("address family 0x%x not supported\n", csk->csk_family);
1303                 goto rel_resource;
1304         }
1305
1306         n = dst_neigh_lookup(csk->dst, daddr);
1307
1308         if (!n) {
1309                 pr_err("%s, can't get neighbour of csk->dst.\n", ndev->name);
1310                 goto rel_resource;
1311         }
1312
1313         csk->atid = cxgb4_alloc_atid(lldi->tids, csk);
1314         if (csk->atid < 0) {
1315                 pr_err("%s, NO atid available.\n", ndev->name);
1316                 return -EINVAL;
1317         }
1318         cxgbi_sock_set_flag(csk, CTPF_HAS_ATID);
1319         cxgbi_sock_get(csk);
1320
1321         csk->l2t = cxgb4_l2t_get(lldi->l2t, n, ndev, 0);
1322         if (!csk->l2t) {
1323                 pr_err("%s, cannot alloc l2t.\n", ndev->name);
1324                 goto rel_resource;
1325         }
1326         cxgbi_sock_get(csk);
1327
1328         if (t4) {
1329                 size = sizeof(struct cpl_act_open_req);
1330                 size6 = sizeof(struct cpl_act_open_req6);
1331         } else {
1332                 size = sizeof(struct cpl_t5_act_open_req);
1333                 size6 = sizeof(struct cpl_t5_act_open_req6);
1334         }
1335
1336         if (csk->csk_family == AF_INET)
1337                 skb = alloc_wr(size, 0, GFP_NOIO);
1338 #if IS_ENABLED(CONFIG_IPV6)
1339         else
1340                 skb = alloc_wr(size6, 0, GFP_NOIO);
1341 #endif
1342
1343         if (!skb)
1344                 goto rel_resource;
1345         skb->sk = (struct sock *)csk;
1346         t4_set_arp_err_handler(skb, csk, cxgbi_sock_act_open_req_arp_failure);
1347
1348         if (!csk->mtu)
1349                 csk->mtu = dst_mtu(csk->dst);
1350         cxgb4_best_mtu(lldi->mtus, csk->mtu, &csk->mss_idx);
1351         csk->tx_chan = cxgb4_port_chan(ndev);
1352         /* SMT two entries per row */
1353         csk->smac_idx = ((cxgb4_port_viid(ndev) & 0x7F)) << 1;
1354         step = lldi->ntxq / lldi->nchan;
1355         csk->txq_idx = cxgb4_port_idx(ndev) * step;
1356         step = lldi->nrxq / lldi->nchan;
1357         csk->rss_qid = lldi->rxq_ids[cxgb4_port_idx(ndev) * step];
1358         csk->wr_cred = lldi->wr_cred -
1359                        DIV_ROUND_UP(sizeof(struct cpl_abort_req), 16);
1360         csk->wr_max_cred = csk->wr_cred;
1361         csk->wr_una_cred = 0;
1362         cxgbi_sock_reset_wr_list(csk);
1363         csk->err = 0;
1364
1365         pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u,%u,%u, mtu %u,%u, smac %u.\n",
1366                        (&csk->saddr), (&csk->daddr), csk, csk->state,
1367                        csk->flags, csk->tx_chan, csk->txq_idx, csk->rss_qid,
1368                        csk->mtu, csk->mss_idx, csk->smac_idx);
1369
1370         /* must wait for either a act_open_rpl or act_open_establish */
1371         try_module_get(THIS_MODULE);
1372         cxgbi_sock_set_state(csk, CTP_ACTIVE_OPEN);
1373         if (csk->csk_family == AF_INET)
1374                 send_act_open_req(csk, skb, csk->l2t);
1375 #if IS_ENABLED(CONFIG_IPV6)
1376         else
1377                 send_act_open_req6(csk, skb, csk->l2t);
1378 #endif
1379         neigh_release(n);
1380
1381         return 0;
1382
1383 rel_resource:
1384         if (n)
1385                 neigh_release(n);
1386         if (skb)
1387                 __kfree_skb(skb);
1388         return -EINVAL;
1389 }
1390
1391 cxgb4i_cplhandler_func cxgb4i_cplhandlers[NUM_CPL_CMDS] = {
1392         [CPL_ACT_ESTABLISH] = do_act_establish,
1393         [CPL_ACT_OPEN_RPL] = do_act_open_rpl,
1394         [CPL_PEER_CLOSE] = do_peer_close,
1395         [CPL_ABORT_REQ_RSS] = do_abort_req_rss,
1396         [CPL_ABORT_RPL_RSS] = do_abort_rpl_rss,
1397         [CPL_CLOSE_CON_RPL] = do_close_con_rpl,
1398         [CPL_FW4_ACK] = do_fw4_ack,
1399         [CPL_ISCSI_HDR] = do_rx_iscsi_hdr,
1400         [CPL_ISCSI_DATA] = do_rx_iscsi_hdr,
1401         [CPL_SET_TCB_RPL] = do_set_tcb_rpl,
1402         [CPL_RX_DATA_DDP] = do_rx_data_ddp,
1403         [CPL_RX_ISCSI_DDP] = do_rx_data_ddp,
1404 };
1405
1406 int cxgb4i_ofld_init(struct cxgbi_device *cdev)
1407 {
1408         int rc;
1409
1410         if (cxgb4i_max_connect > CXGB4I_MAX_CONN)
1411                 cxgb4i_max_connect = CXGB4I_MAX_CONN;
1412
1413         rc = cxgbi_device_portmap_create(cdev, cxgb4i_sport_base,
1414                                         cxgb4i_max_connect);
1415         if (rc < 0)
1416                 return rc;
1417
1418         cdev->csk_release_offload_resources = release_offload_resources;
1419         cdev->csk_push_tx_frames = push_tx_frames;
1420         cdev->csk_send_abort_req = send_abort_req;
1421         cdev->csk_send_close_req = send_close_req;
1422         cdev->csk_send_rx_credits = send_rx_credits;
1423         cdev->csk_alloc_cpls = alloc_cpls;
1424         cdev->csk_init_act_open = init_act_open;
1425
1426         pr_info("cdev 0x%p, offload up, added.\n", cdev);
1427         return 0;
1428 }
1429
1430 /*
1431  * functions to program the pagepod in h/w
1432  */
1433 #define ULPMEM_IDATA_MAX_NPPODS 4 /* 256/PPOD_SIZE */
1434 static inline void ulp_mem_io_set_hdr(struct cxgb4_lld_info *lldi,
1435                                 struct ulp_mem_io *req,
1436                                 unsigned int wr_len, unsigned int dlen,
1437                                 unsigned int pm_addr)
1438 {
1439         struct ulptx_idata *idata = (struct ulptx_idata *)(req + 1);
1440
1441         INIT_ULPTX_WR(req, wr_len, 0, 0);
1442         if (is_t4(lldi->adapter_type))
1443                 req->cmd = htonl(ULPTX_CMD(ULP_TX_MEM_WRITE) |
1444                                         (ULP_MEMIO_ORDER(1)));
1445         else
1446                 req->cmd = htonl(ULPTX_CMD(ULP_TX_MEM_WRITE) |
1447                                         (V_T5_ULP_MEMIO_IMM(1)));
1448         req->dlen = htonl(ULP_MEMIO_DATA_LEN(dlen >> 5));
1449         req->lock_addr = htonl(ULP_MEMIO_ADDR(pm_addr >> 5));
1450         req->len16 = htonl(DIV_ROUND_UP(wr_len - sizeof(req->wr), 16));
1451
1452         idata->cmd_more = htonl(ULPTX_CMD(ULP_TX_SC_IMM));
1453         idata->len = htonl(dlen);
1454 }
1455
1456 static int ddp_ppod_write_idata(struct cxgbi_device *cdev, unsigned int port_id,
1457                                 struct cxgbi_pagepod_hdr *hdr, unsigned int idx,
1458                                 unsigned int npods,
1459                                 struct cxgbi_gather_list *gl,
1460                                 unsigned int gl_pidx)
1461 {
1462         struct cxgbi_ddp_info *ddp = cdev->ddp;
1463         struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1464         struct sk_buff *skb;
1465         struct ulp_mem_io *req;
1466         struct ulptx_idata *idata;
1467         struct cxgbi_pagepod *ppod;
1468         unsigned int pm_addr = idx * PPOD_SIZE + ddp->llimit;
1469         unsigned int dlen = PPOD_SIZE * npods;
1470         unsigned int wr_len = roundup(sizeof(struct ulp_mem_io) +
1471                                 sizeof(struct ulptx_idata) + dlen, 16);
1472         unsigned int i;
1473
1474         skb = alloc_wr(wr_len, 0, GFP_ATOMIC);
1475         if (!skb) {
1476                 pr_err("cdev 0x%p, idx %u, npods %u, OOM.\n",
1477                         cdev, idx, npods);
1478                 return -ENOMEM;
1479         }
1480         req = (struct ulp_mem_io *)skb->head;
1481         set_queue(skb, CPL_PRIORITY_CONTROL, NULL);
1482
1483         ulp_mem_io_set_hdr(lldi, req, wr_len, dlen, pm_addr);
1484         idata = (struct ulptx_idata *)(req + 1);
1485         ppod = (struct cxgbi_pagepod *)(idata + 1);
1486
1487         for (i = 0; i < npods; i++, ppod++, gl_pidx += PPOD_PAGES_MAX) {
1488                 if (!hdr && !gl)
1489                         cxgbi_ddp_ppod_clear(ppod);
1490                 else
1491                         cxgbi_ddp_ppod_set(ppod, hdr, gl, gl_pidx);
1492         }
1493
1494         cxgb4_ofld_send(cdev->ports[port_id], skb);
1495         return 0;
1496 }
1497
1498 static int ddp_set_map(struct cxgbi_sock *csk, struct cxgbi_pagepod_hdr *hdr,
1499                         unsigned int idx, unsigned int npods,
1500                         struct cxgbi_gather_list *gl)
1501 {
1502         unsigned int i, cnt;
1503         int err = 0;
1504
1505         for (i = 0; i < npods; i += cnt, idx += cnt) {
1506                 cnt = npods - i;
1507                 if (cnt > ULPMEM_IDATA_MAX_NPPODS)
1508                         cnt = ULPMEM_IDATA_MAX_NPPODS;
1509                 err = ddp_ppod_write_idata(csk->cdev, csk->port_id, hdr,
1510                                         idx, cnt, gl, 4 * i);
1511                 if (err < 0)
1512                         break;
1513         }
1514         return err;
1515 }
1516
1517 static void ddp_clear_map(struct cxgbi_hba *chba, unsigned int tag,
1518                           unsigned int idx, unsigned int npods)
1519 {
1520         unsigned int i, cnt;
1521         int err;
1522
1523         for (i = 0; i < npods; i += cnt, idx += cnt) {
1524                 cnt = npods - i;
1525                 if (cnt > ULPMEM_IDATA_MAX_NPPODS)
1526                         cnt = ULPMEM_IDATA_MAX_NPPODS;
1527                 err = ddp_ppod_write_idata(chba->cdev, chba->port_id, NULL,
1528                                         idx, cnt, NULL, 0);
1529                 if (err < 0)
1530                         break;
1531         }
1532 }
1533
1534 static int ddp_setup_conn_pgidx(struct cxgbi_sock *csk, unsigned int tid,
1535                                 int pg_idx, bool reply)
1536 {
1537         struct sk_buff *skb;
1538         struct cpl_set_tcb_field *req;
1539
1540         if (!pg_idx || pg_idx >= DDP_PGIDX_MAX)
1541                 return 0;
1542
1543         skb = alloc_wr(sizeof(*req), 0, GFP_KERNEL);
1544         if (!skb)
1545                 return -ENOMEM;
1546
1547         /*  set up ulp page size */
1548         req = (struct cpl_set_tcb_field *)skb->head;
1549         INIT_TP_WR(req, csk->tid);
1550         OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, csk->tid));
1551         req->reply_ctrl = htons(NO_REPLY(reply) | QUEUENO(csk->rss_qid));
1552         req->word_cookie = htons(0);
1553         req->mask = cpu_to_be64(0x3 << 8);
1554         req->val = cpu_to_be64(pg_idx << 8);
1555         set_wr_txq(skb, CPL_PRIORITY_CONTROL, csk->port_id);
1556
1557         log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1558                 "csk 0x%p, tid 0x%x, pg_idx %u.\n", csk, csk->tid, pg_idx);
1559
1560         cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
1561         return 0;
1562 }
1563
1564 static int ddp_setup_conn_digest(struct cxgbi_sock *csk, unsigned int tid,
1565                                  int hcrc, int dcrc, int reply)
1566 {
1567         struct sk_buff *skb;
1568         struct cpl_set_tcb_field *req;
1569
1570         if (!hcrc && !dcrc)
1571                 return 0;
1572
1573         skb = alloc_wr(sizeof(*req), 0, GFP_KERNEL);
1574         if (!skb)
1575                 return -ENOMEM;
1576
1577         csk->hcrc_len = (hcrc ? 4 : 0);
1578         csk->dcrc_len = (dcrc ? 4 : 0);
1579         /*  set up ulp submode */
1580         req = (struct cpl_set_tcb_field *)skb->head;
1581         INIT_TP_WR(req, tid);
1582         OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, tid));
1583         req->reply_ctrl = htons(NO_REPLY(reply) | QUEUENO(csk->rss_qid));
1584         req->word_cookie = htons(0);
1585         req->mask = cpu_to_be64(0x3 << 4);
1586         req->val = cpu_to_be64(((hcrc ? ULP_CRC_HEADER : 0) |
1587                                 (dcrc ? ULP_CRC_DATA : 0)) << 4);
1588         set_wr_txq(skb, CPL_PRIORITY_CONTROL, csk->port_id);
1589
1590         log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1591                 "csk 0x%p, tid 0x%x, crc %d,%d.\n", csk, csk->tid, hcrc, dcrc);
1592
1593         cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
1594         return 0;
1595 }
1596
1597 static int cxgb4i_ddp_init(struct cxgbi_device *cdev)
1598 {
1599         struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1600         struct cxgbi_ddp_info *ddp = cdev->ddp;
1601         unsigned int tagmask, pgsz_factor[4];
1602         int err;
1603
1604         if (ddp) {
1605                 kref_get(&ddp->refcnt);
1606                 pr_warn("cdev 0x%p, ddp 0x%p already set up.\n",
1607                         cdev, cdev->ddp);
1608                 return -EALREADY;
1609         }
1610
1611         err = cxgbi_ddp_init(cdev, lldi->vr->iscsi.start,
1612                         lldi->vr->iscsi.start + lldi->vr->iscsi.size - 1,
1613                         lldi->iscsi_iolen, lldi->iscsi_iolen);
1614         if (err < 0)
1615                 return err;
1616
1617         ddp = cdev->ddp;
1618
1619         tagmask = ddp->idx_mask << PPOD_IDX_SHIFT;
1620         cxgbi_ddp_page_size_factor(pgsz_factor);
1621         cxgb4_iscsi_init(lldi->ports[0], tagmask, pgsz_factor);
1622
1623         cdev->csk_ddp_setup_digest = ddp_setup_conn_digest;
1624         cdev->csk_ddp_setup_pgidx = ddp_setup_conn_pgidx;
1625         cdev->csk_ddp_set = ddp_set_map;
1626         cdev->csk_ddp_clear = ddp_clear_map;
1627
1628         pr_info("cxgb4i 0x%p tag: sw %u, rsvd %u,%u, mask 0x%x.\n",
1629                 cdev, cdev->tag_format.sw_bits, cdev->tag_format.rsvd_bits,
1630                 cdev->tag_format.rsvd_shift, cdev->tag_format.rsvd_mask);
1631         pr_info("cxgb4i 0x%p, nppods %u, bits %u, mask 0x%x,0x%x pkt %u/%u, "
1632                 " %u/%u.\n",
1633                 cdev, ddp->nppods, ddp->idx_bits, ddp->idx_mask,
1634                 ddp->rsvd_tag_mask, ddp->max_txsz, lldi->iscsi_iolen,
1635                 ddp->max_rxsz, lldi->iscsi_iolen);
1636         pr_info("cxgb4i 0x%p max payload size: %u/%u, %u/%u.\n",
1637                 cdev, cdev->tx_max_size, ddp->max_txsz, cdev->rx_max_size,
1638                 ddp->max_rxsz);
1639         return 0;
1640 }
1641
1642 static void *t4_uld_add(const struct cxgb4_lld_info *lldi)
1643 {
1644         struct cxgbi_device *cdev;
1645         struct port_info *pi;
1646         int i, rc;
1647
1648         cdev = cxgbi_device_register(sizeof(*lldi), lldi->nports);
1649         if (!cdev) {
1650                 pr_info("t4 device 0x%p, register failed.\n", lldi);
1651                 return NULL;
1652         }
1653         pr_info("0x%p,0x%x, ports %u,%s, chan %u, q %u,%u, wr %u.\n",
1654                 cdev, lldi->adapter_type, lldi->nports,
1655                 lldi->ports[0]->name, lldi->nchan, lldi->ntxq,
1656                 lldi->nrxq, lldi->wr_cred);
1657         for (i = 0; i < lldi->nrxq; i++)
1658                 log_debug(1 << CXGBI_DBG_DEV,
1659                         "t4 0x%p, rxq id #%d: %u.\n",
1660                         cdev, i, lldi->rxq_ids[i]);
1661
1662         memcpy(cxgbi_cdev_priv(cdev), lldi, sizeof(*lldi));
1663         cdev->flags = CXGBI_FLAG_DEV_T4;
1664         cdev->pdev = lldi->pdev;
1665         cdev->ports = lldi->ports;
1666         cdev->nports = lldi->nports;
1667         cdev->mtus = lldi->mtus;
1668         cdev->nmtus = NMTUS;
1669         cdev->snd_win = cxgb4i_snd_win;
1670         cdev->rcv_win = cxgb4i_rcv_win;
1671         cdev->rx_credit_thres = cxgb4i_rx_credit_thres;
1672         cdev->skb_tx_rsvd = CXGB4I_TX_HEADER_LEN;
1673         cdev->skb_rx_extra = sizeof(struct cpl_iscsi_hdr);
1674         cdev->itp = &cxgb4i_iscsi_transport;
1675
1676         cdev->pfvf = FW_VIID_PFN_GET(cxgb4_port_viid(lldi->ports[0])) << 8;
1677         pr_info("cdev 0x%p,%s, pfvf %u.\n",
1678                 cdev, lldi->ports[0]->name, cdev->pfvf);
1679
1680         rc = cxgb4i_ddp_init(cdev);
1681         if (rc) {
1682                 pr_info("t4 0x%p ddp init failed.\n", cdev);
1683                 goto err_out;
1684         }
1685         rc = cxgb4i_ofld_init(cdev);
1686         if (rc) {
1687                 pr_info("t4 0x%p ofld init failed.\n", cdev);
1688                 goto err_out;
1689         }
1690
1691         rc = cxgbi_hbas_add(cdev, CXGB4I_MAX_LUN, CXGBI_MAX_CONN,
1692                                 &cxgb4i_host_template, cxgb4i_stt);
1693         if (rc)
1694                 goto err_out;
1695
1696         for (i = 0; i < cdev->nports; i++) {
1697                 pi = netdev_priv(lldi->ports[i]);
1698                 cdev->hbas[i]->port_id = pi->port_id;
1699         }
1700         return cdev;
1701
1702 err_out:
1703         cxgbi_device_unregister(cdev);
1704         return ERR_PTR(-ENOMEM);
1705 }
1706
1707 #define RX_PULL_LEN     128
1708 static int t4_uld_rx_handler(void *handle, const __be64 *rsp,
1709                                 const struct pkt_gl *pgl)
1710 {
1711         const struct cpl_act_establish *rpl;
1712         struct sk_buff *skb;
1713         unsigned int opc;
1714         struct cxgbi_device *cdev = handle;
1715
1716         if (pgl == NULL) {
1717                 unsigned int len = 64 - sizeof(struct rsp_ctrl) - 8;
1718
1719                 skb = alloc_wr(len, 0, GFP_ATOMIC);
1720                 if (!skb)
1721                         goto nomem;
1722                 skb_copy_to_linear_data(skb, &rsp[1], len);
1723         } else {
1724                 if (unlikely(*(u8 *)rsp != *(u8 *)pgl->va)) {
1725                         pr_info("? FL 0x%p,RSS%#llx,FL %#llx,len %u.\n",
1726                                 pgl->va, be64_to_cpu(*rsp),
1727                                 be64_to_cpu(*(u64 *)pgl->va),
1728                                 pgl->tot_len);
1729                         return 0;
1730                 }
1731                 skb = cxgb4_pktgl_to_skb(pgl, RX_PULL_LEN, RX_PULL_LEN);
1732                 if (unlikely(!skb))
1733                         goto nomem;
1734         }
1735
1736         rpl = (struct cpl_act_establish *)skb->data;
1737         opc = rpl->ot.opcode;
1738         log_debug(1 << CXGBI_DBG_TOE,
1739                 "cdev %p, opcode 0x%x(0x%x,0x%x), skb %p.\n",
1740                  cdev, opc, rpl->ot.opcode_tid, ntohl(rpl->ot.opcode_tid), skb);
1741         if (cxgb4i_cplhandlers[opc])
1742                 cxgb4i_cplhandlers[opc](cdev, skb);
1743         else {
1744                 pr_err("No handler for opcode 0x%x.\n", opc);
1745                 __kfree_skb(skb);
1746         }
1747         return 0;
1748 nomem:
1749         log_debug(1 << CXGBI_DBG_TOE, "OOM bailing out.\n");
1750         return 1;
1751 }
1752
1753 static int t4_uld_state_change(void *handle, enum cxgb4_state state)
1754 {
1755         struct cxgbi_device *cdev = handle;
1756
1757         switch (state) {
1758         case CXGB4_STATE_UP:
1759                 pr_info("cdev 0x%p, UP.\n", cdev);
1760                 break;
1761         case CXGB4_STATE_START_RECOVERY:
1762                 pr_info("cdev 0x%p, RECOVERY.\n", cdev);
1763                 /* close all connections */
1764                 break;
1765         case CXGB4_STATE_DOWN:
1766                 pr_info("cdev 0x%p, DOWN.\n", cdev);
1767                 break;
1768         case CXGB4_STATE_DETACH:
1769                 pr_info("cdev 0x%p, DETACH.\n", cdev);
1770                 cxgbi_device_unregister(cdev);
1771                 break;
1772         default:
1773                 pr_info("cdev 0x%p, unknown state %d.\n", cdev, state);
1774                 break;
1775         }
1776         return 0;
1777 }
1778
1779 static int __init cxgb4i_init_module(void)
1780 {
1781         int rc;
1782
1783         printk(KERN_INFO "%s", version);
1784
1785         rc = cxgbi_iscsi_init(&cxgb4i_iscsi_transport, &cxgb4i_stt);
1786         if (rc < 0)
1787                 return rc;
1788         cxgb4_register_uld(CXGB4_ULD_ISCSI, &cxgb4i_uld_info);
1789
1790         return 0;
1791 }
1792
1793 static void __exit cxgb4i_exit_module(void)
1794 {
1795         cxgb4_unregister_uld(CXGB4_ULD_ISCSI);
1796         cxgbi_device_unregister_all(CXGBI_FLAG_DEV_T4);
1797         cxgbi_iscsi_cleanup(&cxgb4i_iscsi_transport, &cxgb4i_stt);
1798 }
1799
1800 module_init(cxgb4i_init_module);
1801 module_exit(cxgb4i_exit_module);