linux/drivers/infiniband/hw/cxgb4/cm.c
<<
>>
Prefs
   1/*
   2 * Copyright (c) 2009-2010 Chelsio, Inc. All rights reserved.
   3 *
   4 * This software is available to you under a choice of one of two
   5 * licenses.  You may choose to be licensed under the terms of the GNU
   6 * General Public License (GPL) Version 2, available from the file
   7 * COPYING in the main directory of this source tree, or the
   8 * OpenIB.org BSD license below:
   9 *
  10 *     Redistribution and use in source and binary forms, with or
  11 *     without modification, are permitted provided that the following
  12 *     conditions are met:
  13 *
  14 *      - Redistributions of source code must retain the above
  15 *        copyright notice, this list of conditions and the following
  16 *        disclaimer.
  17 *
  18 *      - Redistributions in binary form must reproduce the above
  19 *        copyright notice, this list of conditions and the following
  20 *        disclaimer in the documentation and/or other materials
  21 *        provided with the distribution.
  22 *
  23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  30 * SOFTWARE.
  31 */
  32#include <linux/module.h>
  33#include <linux/list.h>
  34#include <linux/workqueue.h>
  35#include <linux/skbuff.h>
  36#include <linux/timer.h>
  37#include <linux/notifier.h>
  38#include <linux/inetdevice.h>
  39#include <linux/ip.h>
  40#include <linux/tcp.h>
  41
  42#include <net/neighbour.h>
  43#include <net/netevent.h>
  44#include <net/route.h>
  45
  46#include "iw_cxgb4.h"
  47
  48static char *states[] = {
  49        "idle",
  50        "listen",
  51        "connecting",
  52        "mpa_wait_req",
  53        "mpa_req_sent",
  54        "mpa_req_rcvd",
  55        "mpa_rep_sent",
  56        "fpdu_mode",
  57        "aborting",
  58        "closing",
  59        "moribund",
  60        "dead",
  61        NULL,
  62};
  63
  64static int dack_mode = 1;
  65module_param(dack_mode, int, 0644);
  66MODULE_PARM_DESC(dack_mode, "Delayed ack mode (default=1)");
  67
  68int c4iw_max_read_depth = 8;
  69module_param(c4iw_max_read_depth, int, 0644);
  70MODULE_PARM_DESC(c4iw_max_read_depth, "Per-connection max ORD/IRD (default=8)");
  71
  72static int enable_tcp_timestamps;
  73module_param(enable_tcp_timestamps, int, 0644);
  74MODULE_PARM_DESC(enable_tcp_timestamps, "Enable tcp timestamps (default=0)");
  75
  76static int enable_tcp_sack;
  77module_param(enable_tcp_sack, int, 0644);
  78MODULE_PARM_DESC(enable_tcp_sack, "Enable tcp SACK (default=0)");
  79
  80static int enable_tcp_window_scaling = 1;
  81module_param(enable_tcp_window_scaling, int, 0644);
  82MODULE_PARM_DESC(enable_tcp_window_scaling,
  83                 "Enable tcp window scaling (default=1)");
  84
  85int c4iw_debug;
  86module_param(c4iw_debug, int, 0644);
  87MODULE_PARM_DESC(c4iw_debug, "Enable debug logging (default=0)");
  88
  89static int peer2peer;
  90module_param(peer2peer, int, 0644);
  91MODULE_PARM_DESC(peer2peer, "Support peer2peer ULPs (default=0)");
  92
  93static int p2p_type = FW_RI_INIT_P2PTYPE_READ_REQ;
  94module_param(p2p_type, int, 0644);
  95MODULE_PARM_DESC(p2p_type, "RDMAP opcode to use for the RTR message: "
  96                           "1=RDMA_READ 0=RDMA_WRITE (default 1)");
  97
  98static int ep_timeout_secs = 60;
  99module_param(ep_timeout_secs, int, 0644);
 100MODULE_PARM_DESC(ep_timeout_secs, "CM Endpoint operation timeout "
 101                                   "in seconds (default=60)");
 102
 103static int mpa_rev = 1;
 104module_param(mpa_rev, int, 0644);
 105MODULE_PARM_DESC(mpa_rev, "MPA Revision, 0 supports amso1100, "
 106                 "1 is spec compliant. (default=1)");
 107
 108static int markers_enabled;
 109module_param(markers_enabled, int, 0644);
 110MODULE_PARM_DESC(markers_enabled, "Enable MPA MARKERS (default(0)=disabled)");
 111
 112static int crc_enabled = 1;
 113module_param(crc_enabled, int, 0644);
 114MODULE_PARM_DESC(crc_enabled, "Enable MPA CRC (default(1)=enabled)");
 115
 116static int rcv_win = 256 * 1024;
 117module_param(rcv_win, int, 0644);
 118MODULE_PARM_DESC(rcv_win, "TCP receive window in bytes (default=256KB)");
 119
 120static int snd_win = 128 * 1024;
 121module_param(snd_win, int, 0644);
 122MODULE_PARM_DESC(snd_win, "TCP send window in bytes (default=128KB)");
 123
 124static struct workqueue_struct *workq;
 125
 126static struct sk_buff_head rxq;
 127
 128static struct sk_buff *get_skb(struct sk_buff *skb, int len, gfp_t gfp);
 129static void ep_timeout(unsigned long arg);
 130static void connect_reply_upcall(struct c4iw_ep *ep, int status);
 131
 132static LIST_HEAD(timeout_list);
 133static spinlock_t timeout_lock;
 134
 135static void start_ep_timer(struct c4iw_ep *ep)
 136{
 137        PDBG("%s ep %p\n", __func__, ep);
 138        if (timer_pending(&ep->timer)) {
 139                PDBG("%s stopped / restarted timer ep %p\n", __func__, ep);
 140                del_timer_sync(&ep->timer);
 141        } else
 142                c4iw_get_ep(&ep->com);
 143        ep->timer.expires = jiffies + ep_timeout_secs * HZ;
 144        ep->timer.data = (unsigned long)ep;
 145        ep->timer.function = ep_timeout;
 146        add_timer(&ep->timer);
 147}
 148
 149static void stop_ep_timer(struct c4iw_ep *ep)
 150{
 151        PDBG("%s ep %p\n", __func__, ep);
 152        if (!timer_pending(&ep->timer)) {
 153                printk(KERN_ERR "%s timer stopped when its not running! "
 154                       "ep %p state %u\n", __func__, ep, ep->com.state);
 155                WARN_ON(1);
 156                return;
 157        }
 158        del_timer_sync(&ep->timer);
 159        c4iw_put_ep(&ep->com);
 160}
 161
 162static int c4iw_l2t_send(struct c4iw_rdev *rdev, struct sk_buff *skb,
 163                  struct l2t_entry *l2e)
 164{
 165        int     error = 0;
 166
 167        if (c4iw_fatal_error(rdev)) {
 168                kfree_skb(skb);
 169                PDBG("%s - device in error state - dropping\n", __func__);
 170                return -EIO;
 171        }
 172        error = cxgb4_l2t_send(rdev->lldi.ports[0], skb, l2e);
 173        if (error < 0)
 174                kfree_skb(skb);
 175        return error < 0 ? error : 0;
 176}
 177
 178int c4iw_ofld_send(struct c4iw_rdev *rdev, struct sk_buff *skb)
 179{
 180        int     error = 0;
 181
 182        if (c4iw_fatal_error(rdev)) {
 183                kfree_skb(skb);
 184                PDBG("%s - device in error state - dropping\n", __func__);
 185                return -EIO;
 186        }
 187        error = cxgb4_ofld_send(rdev->lldi.ports[0], skb);
 188        if (error < 0)
 189                kfree_skb(skb);
 190        return error < 0 ? error : 0;
 191}
 192
 193static void release_tid(struct c4iw_rdev *rdev, u32 hwtid, struct sk_buff *skb)
 194{
 195        struct cpl_tid_release *req;
 196
 197        skb = get_skb(skb, sizeof *req, GFP_KERNEL);
 198        if (!skb)
 199                return;
 200        req = (struct cpl_tid_release *) skb_put(skb, sizeof(*req));
 201        INIT_TP_WR(req, hwtid);
 202        OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_TID_RELEASE, hwtid));
 203        set_wr_txq(skb, CPL_PRIORITY_SETUP, 0);
 204        c4iw_ofld_send(rdev, skb);
 205        return;
 206}
 207
 208static void set_emss(struct c4iw_ep *ep, u16 opt)
 209{
 210        ep->emss = ep->com.dev->rdev.lldi.mtus[GET_TCPOPT_MSS(opt)] - 40;
 211        ep->mss = ep->emss;
 212        if (GET_TCPOPT_TSTAMP(opt))
 213                ep->emss -= 12;
 214        if (ep->emss < 128)
 215                ep->emss = 128;
 216        PDBG("%s mss_idx %u mss %u emss=%u\n", __func__, GET_TCPOPT_MSS(opt),
 217             ep->mss, ep->emss);
 218}
 219
 220static enum c4iw_ep_state state_read(struct c4iw_ep_common *epc)
 221{
 222        enum c4iw_ep_state state;
 223
 224        mutex_lock(&epc->mutex);
 225        state = epc->state;
 226        mutex_unlock(&epc->mutex);
 227        return state;
 228}
 229
 230static void __state_set(struct c4iw_ep_common *epc, enum c4iw_ep_state new)
 231{
 232        epc->state = new;
 233}
 234
 235static void state_set(struct c4iw_ep_common *epc, enum c4iw_ep_state new)
 236{
 237        mutex_lock(&epc->mutex);
 238        PDBG("%s - %s -> %s\n", __func__, states[epc->state], states[new]);
 239        __state_set(epc, new);
 240        mutex_unlock(&epc->mutex);
 241        return;
 242}
 243
 244static void *alloc_ep(int size, gfp_t gfp)
 245{
 246        struct c4iw_ep_common *epc;
 247
 248        epc = kzalloc(size, gfp);
 249        if (epc) {
 250                kref_init(&epc->kref);
 251                mutex_init(&epc->mutex);
 252                c4iw_init_wr_wait(&epc->wr_wait);
 253        }
 254        PDBG("%s alloc ep %p\n", __func__, epc);
 255        return epc;
 256}
 257
 258void _c4iw_free_ep(struct kref *kref)
 259{
 260        struct c4iw_ep *ep;
 261
 262        ep = container_of(kref, struct c4iw_ep, com.kref);
 263        PDBG("%s ep %p state %s\n", __func__, ep, states[state_read(&ep->com)]);
 264        if (test_bit(RELEASE_RESOURCES, &ep->com.flags)) {
 265                cxgb4_remove_tid(ep->com.dev->rdev.lldi.tids, 0, ep->hwtid);
 266                dst_release(ep->dst);
 267                cxgb4_l2t_release(ep->l2t);
 268        }
 269        kfree(ep);
 270}
 271
 272static void release_ep_resources(struct c4iw_ep *ep)
 273{
 274        set_bit(RELEASE_RESOURCES, &ep->com.flags);
 275        c4iw_put_ep(&ep->com);
 276}
 277
 278static int status2errno(int status)
 279{
 280        switch (status) {
 281        case CPL_ERR_NONE:
 282                return 0;
 283        case CPL_ERR_CONN_RESET:
 284                return -ECONNRESET;
 285        case CPL_ERR_ARP_MISS:
 286                return -EHOSTUNREACH;
 287        case CPL_ERR_CONN_TIMEDOUT:
 288                return -ETIMEDOUT;
 289        case CPL_ERR_TCAM_FULL:
 290                return -ENOMEM;
 291        case CPL_ERR_CONN_EXIST:
 292                return -EADDRINUSE;
 293        default:
 294                return -EIO;
 295        }
 296}
 297
 298/*
 299 * Try and reuse skbs already allocated...
 300 */
 301static struct sk_buff *get_skb(struct sk_buff *skb, int len, gfp_t gfp)
 302{
 303        if (skb && !skb_is_nonlinear(skb) && !skb_cloned(skb)) {
 304                skb_trim(skb, 0);
 305                skb_get(skb);
 306                skb_reset_transport_header(skb);
 307        } else {
 308                skb = alloc_skb(len, gfp);
 309        }
 310        return skb;
 311}
 312
 313static struct rtable *find_route(struct c4iw_dev *dev, __be32 local_ip,
 314                                 __be32 peer_ip, __be16 local_port,
 315                                 __be16 peer_port, u8 tos)
 316{
 317        struct rtable *rt;
 318
 319        rt = ip_route_output_ports(&init_net, NULL, peer_ip, local_ip,
 320                                   peer_port, local_port, IPPROTO_TCP,
 321                                   tos, 0);
 322        if (IS_ERR(rt))
 323                return NULL;
 324        return rt;
 325}
 326
 327static void arp_failure_discard(void *handle, struct sk_buff *skb)
 328{
 329        PDBG("%s c4iw_dev %p\n", __func__, handle);
 330        kfree_skb(skb);
 331}
 332
 333/*
 334 * Handle an ARP failure for an active open.
 335 */
 336static void act_open_req_arp_failure(void *handle, struct sk_buff *skb)
 337{
 338        printk(KERN_ERR MOD "ARP failure duing connect\n");
 339        kfree_skb(skb);
 340}
 341
 342/*
 343 * Handle an ARP failure for a CPL_ABORT_REQ.  Change it into a no RST variant
 344 * and send it along.
 345 */
 346static void abort_arp_failure(void *handle, struct sk_buff *skb)
 347{
 348        struct c4iw_rdev *rdev = handle;
 349        struct cpl_abort_req *req = cplhdr(skb);
 350
 351        PDBG("%s rdev %p\n", __func__, rdev);
 352        req->cmd = CPL_ABORT_NO_RST;
 353        c4iw_ofld_send(rdev, skb);
 354}
 355
 356static void send_flowc(struct c4iw_ep *ep, struct sk_buff *skb)
 357{
 358        unsigned int flowclen = 80;
 359        struct fw_flowc_wr *flowc;
 360        int i;
 361
 362        skb = get_skb(skb, flowclen, GFP_KERNEL);
 363        flowc = (struct fw_flowc_wr *)__skb_put(skb, flowclen);
 364
 365        flowc->op_to_nparams = cpu_to_be32(FW_WR_OP(FW_FLOWC_WR) |
 366                                           FW_FLOWC_WR_NPARAMS(8));
 367        flowc->flowid_len16 = cpu_to_be32(FW_WR_LEN16(DIV_ROUND_UP(flowclen,
 368                                          16)) | FW_WR_FLOWID(ep->hwtid));
 369
 370        flowc->mnemval[0].mnemonic = FW_FLOWC_MNEM_PFNVFN;
 371        flowc->mnemval[0].val = cpu_to_be32(PCI_FUNC(ep->com.dev->rdev.lldi.pdev->devfn) << 8);
 372        flowc->mnemval[1].mnemonic = FW_FLOWC_MNEM_CH;
 373        flowc->mnemval[1].val = cpu_to_be32(ep->tx_chan);
 374        flowc->mnemval[2].mnemonic = FW_FLOWC_MNEM_PORT;
 375        flowc->mnemval[2].val = cpu_to_be32(ep->tx_chan);
 376        flowc->mnemval[3].mnemonic = FW_FLOWC_MNEM_IQID;
 377        flowc->mnemval[3].val = cpu_to_be32(ep->rss_qid);
 378        flowc->mnemval[4].mnemonic = FW_FLOWC_MNEM_SNDNXT;
 379        flowc->mnemval[4].val = cpu_to_be32(ep->snd_seq);
 380        flowc->mnemval[5].mnemonic = FW_FLOWC_MNEM_RCVNXT;
 381        flowc->mnemval[5].val = cpu_to_be32(ep->rcv_seq);
 382        flowc->mnemval[6].mnemonic = FW_FLOWC_MNEM_SNDBUF;
 383        flowc->mnemval[6].val = cpu_to_be32(snd_win);
 384        flowc->mnemval[7].mnemonic = FW_FLOWC_MNEM_MSS;
 385        flowc->mnemval[7].val = cpu_to_be32(ep->emss);
 386        /* Pad WR to 16 byte boundary */
 387        flowc->mnemval[8].mnemonic = 0;
 388        flowc->mnemval[8].val = 0;
 389        for (i = 0; i < 9; i++) {
 390                flowc->mnemval[i].r4[0] = 0;
 391                flowc->mnemval[i].r4[1] = 0;
 392                flowc->mnemval[i].r4[2] = 0;
 393        }
 394
 395        set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
 396        c4iw_ofld_send(&ep->com.dev->rdev, skb);
 397}
 398
 399static int send_halfclose(struct c4iw_ep *ep, gfp_t gfp)
 400{
 401        struct cpl_close_con_req *req;
 402        struct sk_buff *skb;
 403        int wrlen = roundup(sizeof *req, 16);
 404
 405        PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
 406        skb = get_skb(NULL, wrlen, gfp);
 407        if (!skb) {
 408                printk(KERN_ERR MOD "%s - failed to alloc skb\n", __func__);
 409                return -ENOMEM;
 410        }
 411        set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
 412        t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
 413        req = (struct cpl_close_con_req *) skb_put(skb, wrlen);
 414        memset(req, 0, wrlen);
 415        INIT_TP_WR(req, ep->hwtid);
 416        OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_CLOSE_CON_REQ,
 417                                                    ep->hwtid));
 418        return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
 419}
 420
 421static int send_abort(struct c4iw_ep *ep, struct sk_buff *skb, gfp_t gfp)
 422{
 423        struct cpl_abort_req *req;
 424        int wrlen = roundup(sizeof *req, 16);
 425
 426        PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
 427        skb = get_skb(skb, wrlen, gfp);
 428        if (!skb) {
 429                printk(KERN_ERR MOD "%s - failed to alloc skb.\n",
 430                       __func__);
 431                return -ENOMEM;
 432        }
 433        set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
 434        t4_set_arp_err_handler(skb, &ep->com.dev->rdev, abort_arp_failure);
 435        req = (struct cpl_abort_req *) skb_put(skb, wrlen);
 436        memset(req, 0, wrlen);
 437        INIT_TP_WR(req, ep->hwtid);
 438        OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_REQ, ep->hwtid));
 439        req->cmd = CPL_ABORT_SEND_RST;
 440        return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
 441}
 442
 443static int send_connect(struct c4iw_ep *ep)
 444{
 445        struct cpl_act_open_req *req;
 446        struct sk_buff *skb;
 447        u64 opt0;
 448        u32 opt2;
 449        unsigned int mtu_idx;
 450        int wscale;
 451        int wrlen = roundup(sizeof *req, 16);
 452
 453        PDBG("%s ep %p atid %u\n", __func__, ep, ep->atid);
 454
 455        skb = get_skb(NULL, wrlen, GFP_KERNEL);
 456        if (!skb) {
 457                printk(KERN_ERR MOD "%s - failed to alloc skb.\n",
 458                       __func__);
 459                return -ENOMEM;
 460        }
 461        set_wr_txq(skb, CPL_PRIORITY_SETUP, ep->ctrlq_idx);
 462
 463        cxgb4_best_mtu(ep->com.dev->rdev.lldi.mtus, ep->mtu, &mtu_idx);
 464        wscale = compute_wscale(rcv_win);
 465        opt0 = KEEP_ALIVE(1) |
 466               DELACK(1) |
 467               WND_SCALE(wscale) |
 468               MSS_IDX(mtu_idx) |
 469               L2T_IDX(ep->l2t->idx) |
 470               TX_CHAN(ep->tx_chan) |
 471               SMAC_SEL(ep->smac_idx) |
 472               DSCP(ep->tos) |
 473               ULP_MODE(ULP_MODE_TCPDDP) |
 474               RCV_BUFSIZ(rcv_win>>10);
 475        opt2 = RX_CHANNEL(0) |
 476               RSS_QUEUE_VALID | RSS_QUEUE(ep->rss_qid);
 477        if (enable_tcp_timestamps)
 478                opt2 |= TSTAMPS_EN(1);
 479        if (enable_tcp_sack)
 480                opt2 |= SACK_EN(1);
 481        if (wscale && enable_tcp_window_scaling)
 482                opt2 |= WND_SCALE_EN(1);
 483        t4_set_arp_err_handler(skb, NULL, act_open_req_arp_failure);
 484
 485        req = (struct cpl_act_open_req *) skb_put(skb, wrlen);
 486        INIT_TP_WR(req, 0);
 487        OPCODE_TID(req) = cpu_to_be32(
 488                MK_OPCODE_TID(CPL_ACT_OPEN_REQ, ((ep->rss_qid<<14)|ep->atid)));
 489        req->local_port = ep->com.local_addr.sin_port;
 490        req->peer_port = ep->com.remote_addr.sin_port;
 491        req->local_ip = ep->com.local_addr.sin_addr.s_addr;
 492        req->peer_ip = ep->com.remote_addr.sin_addr.s_addr;
 493        req->opt0 = cpu_to_be64(opt0);
 494        req->params = 0;
 495        req->opt2 = cpu_to_be32(opt2);
 496        return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
 497}
 498
 499static void send_mpa_req(struct c4iw_ep *ep, struct sk_buff *skb)
 500{
 501        int mpalen, wrlen;
 502        struct fw_ofld_tx_data_wr *req;
 503        struct mpa_message *mpa;
 504
 505        PDBG("%s ep %p tid %u pd_len %d\n", __func__, ep, ep->hwtid, ep->plen);
 506
 507        BUG_ON(skb_cloned(skb));
 508
 509        mpalen = sizeof(*mpa) + ep->plen;
 510        wrlen = roundup(mpalen + sizeof *req, 16);
 511        skb = get_skb(skb, wrlen, GFP_KERNEL);
 512        if (!skb) {
 513                connect_reply_upcall(ep, -ENOMEM);
 514                return;
 515        }
 516        set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
 517
 518        req = (struct fw_ofld_tx_data_wr *)skb_put(skb, wrlen);
 519        memset(req, 0, wrlen);
 520        req->op_to_immdlen = cpu_to_be32(
 521                FW_WR_OP(FW_OFLD_TX_DATA_WR) |
 522                FW_WR_COMPL(1) |
 523                FW_WR_IMMDLEN(mpalen));
 524        req->flowid_len16 = cpu_to_be32(
 525                FW_WR_FLOWID(ep->hwtid) |
 526                FW_WR_LEN16(wrlen >> 4));
 527        req->plen = cpu_to_be32(mpalen);
 528        req->tunnel_to_proxy = cpu_to_be32(
 529                FW_OFLD_TX_DATA_WR_FLUSH(1) |
 530                FW_OFLD_TX_DATA_WR_SHOVE(1));
 531
 532        mpa = (struct mpa_message *)(req + 1);
 533        memcpy(mpa->key, MPA_KEY_REQ, sizeof(mpa->key));
 534        mpa->flags = (crc_enabled ? MPA_CRC : 0) |
 535                     (markers_enabled ? MPA_MARKERS : 0);
 536        mpa->private_data_size = htons(ep->plen);
 537        mpa->revision = mpa_rev;
 538
 539        if (ep->plen)
 540                memcpy(mpa->private_data, ep->mpa_pkt + sizeof(*mpa), ep->plen);
 541
 542        /*
 543         * Reference the mpa skb.  This ensures the data area
 544         * will remain in memory until the hw acks the tx.
 545         * Function fw4_ack() will deref it.
 546         */
 547        skb_get(skb);
 548        t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
 549        BUG_ON(ep->mpa_skb);
 550        ep->mpa_skb = skb;
 551        c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
 552        start_ep_timer(ep);
 553        state_set(&ep->com, MPA_REQ_SENT);
 554        ep->mpa_attr.initiator = 1;
 555        return;
 556}
 557
 558static int send_mpa_reject(struct c4iw_ep *ep, const void *pdata, u8 plen)
 559{
 560        int mpalen, wrlen;
 561        struct fw_ofld_tx_data_wr *req;
 562        struct mpa_message *mpa;
 563        struct sk_buff *skb;
 564
 565        PDBG("%s ep %p tid %u pd_len %d\n", __func__, ep, ep->hwtid, ep->plen);
 566
 567        mpalen = sizeof(*mpa) + plen;
 568        wrlen = roundup(mpalen + sizeof *req, 16);
 569
 570        skb = get_skb(NULL, wrlen, GFP_KERNEL);
 571        if (!skb) {
 572                printk(KERN_ERR MOD "%s - cannot alloc skb!\n", __func__);
 573                return -ENOMEM;
 574        }
 575        set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
 576
 577        req = (struct fw_ofld_tx_data_wr *)skb_put(skb, wrlen);
 578        memset(req, 0, wrlen);
 579        req->op_to_immdlen = cpu_to_be32(
 580                FW_WR_OP(FW_OFLD_TX_DATA_WR) |
 581                FW_WR_COMPL(1) |
 582                FW_WR_IMMDLEN(mpalen));
 583        req->flowid_len16 = cpu_to_be32(
 584                FW_WR_FLOWID(ep->hwtid) |
 585                FW_WR_LEN16(wrlen >> 4));
 586        req->plen = cpu_to_be32(mpalen);
 587        req->tunnel_to_proxy = cpu_to_be32(
 588                FW_OFLD_TX_DATA_WR_FLUSH(1) |
 589                FW_OFLD_TX_DATA_WR_SHOVE(1));
 590
 591        mpa = (struct mpa_message *)(req + 1);
 592        memset(mpa, 0, sizeof(*mpa));
 593        memcpy(mpa->key, MPA_KEY_REP, sizeof(mpa->key));
 594        mpa->flags = MPA_REJECT;
 595        mpa->revision = mpa_rev;
 596        mpa->private_data_size = htons(plen);
 597        if (plen)
 598                memcpy(mpa->private_data, pdata, plen);
 599
 600        /*
 601         * Reference the mpa skb again.  This ensures the data area
 602         * will remain in memory until the hw acks the tx.
 603         * Function fw4_ack() will deref it.
 604         */
 605        skb_get(skb);
 606        set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
 607        t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
 608        BUG_ON(ep->mpa_skb);
 609        ep->mpa_skb = skb;
 610        return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
 611}
 612
 613static int send_mpa_reply(struct c4iw_ep *ep, const void *pdata, u8 plen)
 614{
 615        int mpalen, wrlen;
 616        struct fw_ofld_tx_data_wr *req;
 617        struct mpa_message *mpa;
 618        struct sk_buff *skb;
 619
 620        PDBG("%s ep %p tid %u pd_len %d\n", __func__, ep, ep->hwtid, ep->plen);
 621
 622        mpalen = sizeof(*mpa) + plen;
 623        wrlen = roundup(mpalen + sizeof *req, 16);
 624
 625        skb = get_skb(NULL, wrlen, GFP_KERNEL);
 626        if (!skb) {
 627                printk(KERN_ERR MOD "%s - cannot alloc skb!\n", __func__);
 628                return -ENOMEM;
 629        }
 630        set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
 631
 632        req = (struct fw_ofld_tx_data_wr *) skb_put(skb, wrlen);
 633        memset(req, 0, wrlen);
 634        req->op_to_immdlen = cpu_to_be32(
 635                FW_WR_OP(FW_OFLD_TX_DATA_WR) |
 636                FW_WR_COMPL(1) |
 637                FW_WR_IMMDLEN(mpalen));
 638        req->flowid_len16 = cpu_to_be32(
 639                FW_WR_FLOWID(ep->hwtid) |
 640                FW_WR_LEN16(wrlen >> 4));
 641        req->plen = cpu_to_be32(mpalen);
 642        req->tunnel_to_proxy = cpu_to_be32(
 643                FW_OFLD_TX_DATA_WR_FLUSH(1) |
 644                FW_OFLD_TX_DATA_WR_SHOVE(1));
 645
 646        mpa = (struct mpa_message *)(req + 1);
 647        memset(mpa, 0, sizeof(*mpa));
 648        memcpy(mpa->key, MPA_KEY_REP, sizeof(mpa->key));
 649        mpa->flags = (ep->mpa_attr.crc_enabled ? MPA_CRC : 0) |
 650                     (markers_enabled ? MPA_MARKERS : 0);
 651        mpa->revision = mpa_rev;
 652        mpa->private_data_size = htons(plen);
 653        if (plen)
 654                memcpy(mpa->private_data, pdata, plen);
 655
 656        /*
 657         * Reference the mpa skb.  This ensures the data area
 658         * will remain in memory until the hw acks the tx.
 659         * Function fw4_ack() will deref it.
 660         */
 661        skb_get(skb);
 662        t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
 663        ep->mpa_skb = skb;
 664        state_set(&ep->com, MPA_REP_SENT);
 665        return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
 666}
 667
 668static int act_establish(struct c4iw_dev *dev, struct sk_buff *skb)
 669{
 670        struct c4iw_ep *ep;
 671        struct cpl_act_establish *req = cplhdr(skb);
 672        unsigned int tid = GET_TID(req);
 673        unsigned int atid = GET_TID_TID(ntohl(req->tos_atid));
 674        struct tid_info *t = dev->rdev.lldi.tids;
 675
 676        ep = lookup_atid(t, atid);
 677
 678        PDBG("%s ep %p tid %u snd_isn %u rcv_isn %u\n", __func__, ep, tid,
 679             be32_to_cpu(req->snd_isn), be32_to_cpu(req->rcv_isn));
 680
 681        dst_confirm(ep->dst);
 682
 683        /* setup the hwtid for this connection */
 684        ep->hwtid = tid;
 685        cxgb4_insert_tid(t, ep, tid);
 686
 687        ep->snd_seq = be32_to_cpu(req->snd_isn);
 688        ep->rcv_seq = be32_to_cpu(req->rcv_isn);
 689
 690        set_emss(ep, ntohs(req->tcp_opt));
 691
 692        /* dealloc the atid */
 693        cxgb4_free_atid(t, atid);
 694
 695        /* start MPA negotiation */
 696        send_flowc(ep, NULL);
 697        send_mpa_req(ep, skb);
 698
 699        return 0;
 700}
 701
 702static void close_complete_upcall(struct c4iw_ep *ep)
 703{
 704        struct iw_cm_event event;
 705
 706        PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
 707        memset(&event, 0, sizeof(event));
 708        event.event = IW_CM_EVENT_CLOSE;
 709        if (ep->com.cm_id) {
 710                PDBG("close complete delivered ep %p cm_id %p tid %u\n",
 711                     ep, ep->com.cm_id, ep->hwtid);
 712                ep->com.cm_id->event_handler(ep->com.cm_id, &event);
 713                ep->com.cm_id->rem_ref(ep->com.cm_id);
 714                ep->com.cm_id = NULL;
 715                ep->com.qp = NULL;
 716        }
 717}
 718
 719static int abort_connection(struct c4iw_ep *ep, struct sk_buff *skb, gfp_t gfp)
 720{
 721        PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
 722        close_complete_upcall(ep);
 723        state_set(&ep->com, ABORTING);
 724        return send_abort(ep, skb, gfp);
 725}
 726
 727static void peer_close_upcall(struct c4iw_ep *ep)
 728{
 729        struct iw_cm_event event;
 730
 731        PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
 732        memset(&event, 0, sizeof(event));
 733        event.event = IW_CM_EVENT_DISCONNECT;
 734        if (ep->com.cm_id) {
 735                PDBG("peer close delivered ep %p cm_id %p tid %u\n",
 736                     ep, ep->com.cm_id, ep->hwtid);
 737                ep->com.cm_id->event_handler(ep->com.cm_id, &event);
 738        }
 739}
 740
 741static void peer_abort_upcall(struct c4iw_ep *ep)
 742{
 743        struct iw_cm_event event;
 744
 745        PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
 746        memset(&event, 0, sizeof(event));
 747        event.event = IW_CM_EVENT_CLOSE;
 748        event.status = -ECONNRESET;
 749        if (ep->com.cm_id) {
 750                PDBG("abort delivered ep %p cm_id %p tid %u\n", ep,
 751                     ep->com.cm_id, ep->hwtid);
 752                ep->com.cm_id->event_handler(ep->com.cm_id, &event);
 753                ep->com.cm_id->rem_ref(ep->com.cm_id);
 754                ep->com.cm_id = NULL;
 755                ep->com.qp = NULL;
 756        }
 757}
 758
 759static void connect_reply_upcall(struct c4iw_ep *ep, int status)
 760{
 761        struct iw_cm_event event;
 762
 763        PDBG("%s ep %p tid %u status %d\n", __func__, ep, ep->hwtid, status);
 764        memset(&event, 0, sizeof(event));
 765        event.event = IW_CM_EVENT_CONNECT_REPLY;
 766        event.status = status;
 767        event.local_addr = ep->com.local_addr;
 768        event.remote_addr = ep->com.remote_addr;
 769
 770        if ((status == 0) || (status == -ECONNREFUSED)) {
 771                event.private_data_len = ep->plen;
 772                event.private_data = ep->mpa_pkt + sizeof(struct mpa_message);
 773        }
 774
 775        PDBG("%s ep %p tid %u status %d\n", __func__, ep,
 776             ep->hwtid, status);
 777        ep->com.cm_id->event_handler(ep->com.cm_id, &event);
 778
 779        if (status < 0) {
 780                ep->com.cm_id->rem_ref(ep->com.cm_id);
 781                ep->com.cm_id = NULL;
 782                ep->com.qp = NULL;
 783        }
 784}
 785
 786static void connect_request_upcall(struct c4iw_ep *ep)
 787{
 788        struct iw_cm_event event;
 789
 790        PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
 791        memset(&event, 0, sizeof(event));
 792        event.event = IW_CM_EVENT_CONNECT_REQUEST;
 793        event.local_addr = ep->com.local_addr;
 794        event.remote_addr = ep->com.remote_addr;
 795        event.private_data_len = ep->plen;
 796        event.private_data = ep->mpa_pkt + sizeof(struct mpa_message);
 797        event.provider_data = ep;
 798        if (state_read(&ep->parent_ep->com) != DEAD) {
 799                c4iw_get_ep(&ep->com);
 800                ep->parent_ep->com.cm_id->event_handler(
 801                                                ep->parent_ep->com.cm_id,
 802                                                &event);
 803        }
 804        c4iw_put_ep(&ep->parent_ep->com);
 805        ep->parent_ep = NULL;
 806}
 807
 808static void established_upcall(struct c4iw_ep *ep)
 809{
 810        struct iw_cm_event event;
 811
 812        PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
 813        memset(&event, 0, sizeof(event));
 814        event.event = IW_CM_EVENT_ESTABLISHED;
 815        if (ep->com.cm_id) {
 816                PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
 817                ep->com.cm_id->event_handler(ep->com.cm_id, &event);
 818        }
 819}
 820
 821static int update_rx_credits(struct c4iw_ep *ep, u32 credits)
 822{
 823        struct cpl_rx_data_ack *req;
 824        struct sk_buff *skb;
 825        int wrlen = roundup(sizeof *req, 16);
 826
 827        PDBG("%s ep %p tid %u credits %u\n", __func__, ep, ep->hwtid, credits);
 828        skb = get_skb(NULL, wrlen, GFP_KERNEL);
 829        if (!skb) {
 830                printk(KERN_ERR MOD "update_rx_credits - cannot alloc skb!\n");
 831                return 0;
 832        }
 833
 834        req = (struct cpl_rx_data_ack *) skb_put(skb, wrlen);
 835        memset(req, 0, wrlen);
 836        INIT_TP_WR(req, ep->hwtid);
 837        OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_RX_DATA_ACK,
 838                                                    ep->hwtid));
 839        req->credit_dack = cpu_to_be32(credits | RX_FORCE_ACK(1) |
 840                                       F_RX_DACK_CHANGE |
 841                                       V_RX_DACK_MODE(dack_mode));
 842        set_wr_txq(skb, CPL_PRIORITY_ACK, ep->ctrlq_idx);
 843        c4iw_ofld_send(&ep->com.dev->rdev, skb);
 844        return credits;
 845}
 846
 847static void process_mpa_reply(struct c4iw_ep *ep, struct sk_buff *skb)
 848{
 849        struct mpa_message *mpa;
 850        u16 plen;
 851        struct c4iw_qp_attributes attrs;
 852        enum c4iw_qp_attr_mask mask;
 853        int err;
 854
 855        PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
 856
 857        /*
 858         * Stop mpa timer.  If it expired, then the state has
 859         * changed and we bail since ep_timeout already aborted
 860         * the connection.
 861         */
 862        stop_ep_timer(ep);
 863        if (state_read(&ep->com) != MPA_REQ_SENT)
 864                return;
 865
 866        /*
 867         * If we get more than the supported amount of private data
 868         * then we must fail this connection.
 869         */
 870        if (ep->mpa_pkt_len + skb->len > sizeof(ep->mpa_pkt)) {
 871                err = -EINVAL;
 872                goto err;
 873        }
 874
 875        /*
 876         * copy the new data into our accumulation buffer.
 877         */
 878        skb_copy_from_linear_data(skb, &(ep->mpa_pkt[ep->mpa_pkt_len]),
 879                                  skb->len);
 880        ep->mpa_pkt_len += skb->len;
 881
 882        /*
 883         * if we don't even have the mpa message, then bail.
 884         */
 885        if (ep->mpa_pkt_len < sizeof(*mpa))
 886                return;
 887        mpa = (struct mpa_message *) ep->mpa_pkt;
 888
 889        /* Validate MPA header. */
 890        if (mpa->revision != mpa_rev) {
 891                err = -EPROTO;
 892                goto err;
 893        }
 894        if (memcmp(mpa->key, MPA_KEY_REP, sizeof(mpa->key))) {
 895                err = -EPROTO;
 896                goto err;
 897        }
 898
 899        plen = ntohs(mpa->private_data_size);
 900
 901        /*
 902         * Fail if there's too much private data.
 903         */
 904        if (plen > MPA_MAX_PRIVATE_DATA) {
 905                err = -EPROTO;
 906                goto err;
 907        }
 908
 909        /*
 910         * If plen does not account for pkt size
 911         */
 912        if (ep->mpa_pkt_len > (sizeof(*mpa) + plen)) {
 913                err = -EPROTO;
 914                goto err;
 915        }
 916
 917        ep->plen = (u8) plen;
 918
 919        /*
 920         * If we don't have all the pdata yet, then bail.
 921         * We'll continue process when more data arrives.
 922         */
 923        if (ep->mpa_pkt_len < (sizeof(*mpa) + plen))
 924                return;
 925
 926        if (mpa->flags & MPA_REJECT) {
 927                err = -ECONNREFUSED;
 928                goto err;
 929        }
 930
 931        /*
 932         * If we get here we have accumulated the entire mpa
 933         * start reply message including private data. And
 934         * the MPA header is valid.
 935         */
 936        state_set(&ep->com, FPDU_MODE);
 937        ep->mpa_attr.crc_enabled = (mpa->flags & MPA_CRC) | crc_enabled ? 1 : 0;
 938        ep->mpa_attr.recv_marker_enabled = markers_enabled;
 939        ep->mpa_attr.xmit_marker_enabled = mpa->flags & MPA_MARKERS ? 1 : 0;
 940        ep->mpa_attr.version = mpa_rev;
 941        ep->mpa_attr.p2p_type = peer2peer ? p2p_type :
 942                                            FW_RI_INIT_P2PTYPE_DISABLED;
 943        PDBG("%s - crc_enabled=%d, recv_marker_enabled=%d, "
 944             "xmit_marker_enabled=%d, version=%d\n", __func__,
 945             ep->mpa_attr.crc_enabled, ep->mpa_attr.recv_marker_enabled,
 946             ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version);
 947
 948        attrs.mpa_attr = ep->mpa_attr;
 949        attrs.max_ird = ep->ird;
 950        attrs.max_ord = ep->ord;
 951        attrs.llp_stream_handle = ep;
 952        attrs.next_state = C4IW_QP_STATE_RTS;
 953
 954        mask = C4IW_QP_ATTR_NEXT_STATE |
 955            C4IW_QP_ATTR_LLP_STREAM_HANDLE | C4IW_QP_ATTR_MPA_ATTR |
 956            C4IW_QP_ATTR_MAX_IRD | C4IW_QP_ATTR_MAX_ORD;
 957
 958        /* bind QP and TID with INIT_WR */
 959        err = c4iw_modify_qp(ep->com.qp->rhp,
 960                             ep->com.qp, mask, &attrs, 1);
 961        if (err)
 962                goto err;
 963        goto out;
 964err:
 965        state_set(&ep->com, ABORTING);
 966        send_abort(ep, skb, GFP_KERNEL);
 967out:
 968        connect_reply_upcall(ep, err);
 969        return;
 970}
 971
 972static void process_mpa_request(struct c4iw_ep *ep, struct sk_buff *skb)
 973{
 974        struct mpa_message *mpa;
 975        u16 plen;
 976
 977        PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
 978
 979        if (state_read(&ep->com) != MPA_REQ_WAIT)
 980                return;
 981
 982        /*
 983         * If we get more than the supported amount of private data
 984         * then we must fail this connection.
 985         */
 986        if (ep->mpa_pkt_len + skb->len > sizeof(ep->mpa_pkt)) {
 987                stop_ep_timer(ep);
 988                abort_connection(ep, skb, GFP_KERNEL);
 989                return;
 990        }
 991
 992        PDBG("%s enter (%s line %u)\n", __func__, __FILE__, __LINE__);
 993
 994        /*
 995         * Copy the new data into our accumulation buffer.
 996         */
 997        skb_copy_from_linear_data(skb, &(ep->mpa_pkt[ep->mpa_pkt_len]),
 998                                  skb->len);
 999        ep->mpa_pkt_len += skb->len;
1000
1001        /*
1002         * If we don't even have the mpa message, then bail.
1003         * We'll continue process when more data arrives.
1004         */
1005        if (ep->mpa_pkt_len < sizeof(*mpa))
1006                return;
1007
1008        PDBG("%s enter (%s line %u)\n", __func__, __FILE__, __LINE__);
1009        stop_ep_timer(ep);
1010        mpa = (struct mpa_message *) ep->mpa_pkt;
1011
1012        /*
1013         * Validate MPA Header.
1014         */
1015        if (mpa->revision != mpa_rev) {
1016                abort_connection(ep, skb, GFP_KERNEL);
1017                return;
1018        }
1019
1020        if (memcmp(mpa->key, MPA_KEY_REQ, sizeof(mpa->key))) {
1021                abort_connection(ep, skb, GFP_KERNEL);
1022                return;
1023        }
1024
1025        plen = ntohs(mpa->private_data_size);
1026
1027        /*
1028         * Fail if there's too much private data.
1029         */
1030        if (plen > MPA_MAX_PRIVATE_DATA) {
1031                abort_connection(ep, skb, GFP_KERNEL);
1032                return;
1033        }
1034
1035        /*
1036         * If plen does not account for pkt size
1037         */
1038        if (ep->mpa_pkt_len > (sizeof(*mpa) + plen)) {
1039                abort_connection(ep, skb, GFP_KERNEL);
1040                return;
1041        }
1042        ep->plen = (u8) plen;
1043
1044        /*
1045         * If we don't have all the pdata yet, then bail.
1046         */
1047        if (ep->mpa_pkt_len < (sizeof(*mpa) + plen))
1048                return;
1049
1050        /*
1051         * If we get here we have accumulated the entire mpa
1052         * start reply message including private data.
1053         */
1054        ep->mpa_attr.initiator = 0;
1055        ep->mpa_attr.crc_enabled = (mpa->flags & MPA_CRC) | crc_enabled ? 1 : 0;
1056        ep->mpa_attr.recv_marker_enabled = markers_enabled;
1057        ep->mpa_attr.xmit_marker_enabled = mpa->flags & MPA_MARKERS ? 1 : 0;
1058        ep->mpa_attr.version = mpa_rev;
1059        ep->mpa_attr.p2p_type = peer2peer ? p2p_type :
1060                                            FW_RI_INIT_P2PTYPE_DISABLED;
1061        PDBG("%s - crc_enabled=%d, recv_marker_enabled=%d, "
1062             "xmit_marker_enabled=%d, version=%d p2p_type=%d\n", __func__,
1063             ep->mpa_attr.crc_enabled, ep->mpa_attr.recv_marker_enabled,
1064             ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version,
1065             ep->mpa_attr.p2p_type);
1066
1067        state_set(&ep->com, MPA_REQ_RCVD);
1068
1069        /* drive upcall */
1070        connect_request_upcall(ep);
1071        return;
1072}
1073
1074static int rx_data(struct c4iw_dev *dev, struct sk_buff *skb)
1075{
1076        struct c4iw_ep *ep;
1077        struct cpl_rx_data *hdr = cplhdr(skb);
1078        unsigned int dlen = ntohs(hdr->len);
1079        unsigned int tid = GET_TID(hdr);
1080        struct tid_info *t = dev->rdev.lldi.tids;
1081
1082        ep = lookup_tid(t, tid);
1083        PDBG("%s ep %p tid %u dlen %u\n", __func__, ep, ep->hwtid, dlen);
1084        skb_pull(skb, sizeof(*hdr));
1085        skb_trim(skb, dlen);
1086
1087        ep->rcv_seq += dlen;
1088        BUG_ON(ep->rcv_seq != (ntohl(hdr->seq) + dlen));
1089
1090        /* update RX credits */
1091        update_rx_credits(ep, dlen);
1092
1093        switch (state_read(&ep->com)) {
1094        case MPA_REQ_SENT:
1095                process_mpa_reply(ep, skb);
1096                break;
1097        case MPA_REQ_WAIT:
1098                process_mpa_request(ep, skb);
1099                break;
1100        case MPA_REP_SENT:
1101                break;
1102        default:
1103                printk(KERN_ERR MOD "%s Unexpected streaming data."
1104                       " ep %p state %d tid %u\n",
1105                       __func__, ep, state_read(&ep->com), ep->hwtid);
1106
1107                /*
1108                 * The ep will timeout and inform the ULP of the failure.
1109                 * See ep_timeout().
1110                 */
1111                break;
1112        }
1113        return 0;
1114}
1115
1116static int abort_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
1117{
1118        struct c4iw_ep *ep;
1119        struct cpl_abort_rpl_rss *rpl = cplhdr(skb);
1120        int release = 0;
1121        unsigned int tid = GET_TID(rpl);
1122        struct tid_info *t = dev->rdev.lldi.tids;
1123
1124        ep = lookup_tid(t, tid);
1125        PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1126        BUG_ON(!ep);
1127        mutex_lock(&ep->com.mutex);
1128        switch (ep->com.state) {
1129        case ABORTING:
1130                __state_set(&ep->com, DEAD);
1131                release = 1;
1132                break;
1133        default:
1134                printk(KERN_ERR "%s ep %p state %d\n",
1135                     __func__, ep, ep->com.state);
1136                break;
1137        }
1138        mutex_unlock(&ep->com.mutex);
1139
1140        if (release)
1141                release_ep_resources(ep);
1142        return 0;
1143}
1144
1145/*
1146 * Return whether a failed active open has allocated a TID
1147 */
1148static inline int act_open_has_tid(int status)
1149{
1150        return status != CPL_ERR_TCAM_FULL && status != CPL_ERR_CONN_EXIST &&
1151               status != CPL_ERR_ARP_MISS;
1152}
1153
1154static int act_open_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
1155{
1156        struct c4iw_ep *ep;
1157        struct cpl_act_open_rpl *rpl = cplhdr(skb);
1158        unsigned int atid = GET_TID_TID(GET_AOPEN_ATID(
1159                                        ntohl(rpl->atid_status)));
1160        struct tid_info *t = dev->rdev.lldi.tids;
1161        int status = GET_AOPEN_STATUS(ntohl(rpl->atid_status));
1162
1163        ep = lookup_atid(t, atid);
1164
1165        PDBG("%s ep %p atid %u status %u errno %d\n", __func__, ep, atid,
1166             status, status2errno(status));
1167
1168        if (status == CPL_ERR_RTX_NEG_ADVICE) {
1169                printk(KERN_WARNING MOD "Connection problems for atid %u\n",
1170                        atid);
1171                return 0;
1172        }
1173
1174        connect_reply_upcall(ep, status2errno(status));
1175        state_set(&ep->com, DEAD);
1176
1177        if (status && act_open_has_tid(status))
1178                cxgb4_remove_tid(ep->com.dev->rdev.lldi.tids, 0, GET_TID(rpl));
1179
1180        cxgb4_free_atid(t, atid);
1181        dst_release(ep->dst);
1182        cxgb4_l2t_release(ep->l2t);
1183        c4iw_put_ep(&ep->com);
1184
1185        return 0;
1186}
1187
1188static int pass_open_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
1189{
1190        struct cpl_pass_open_rpl *rpl = cplhdr(skb);
1191        struct tid_info *t = dev->rdev.lldi.tids;
1192        unsigned int stid = GET_TID(rpl);
1193        struct c4iw_listen_ep *ep = lookup_stid(t, stid);
1194
1195        if (!ep) {
1196                printk(KERN_ERR MOD "stid %d lookup failure!\n", stid);
1197                return 0;
1198        }
1199        PDBG("%s ep %p status %d error %d\n", __func__, ep,
1200             rpl->status, status2errno(rpl->status));
1201        ep->com.wr_wait.ret = status2errno(rpl->status);
1202        ep->com.wr_wait.done = 1;
1203        wake_up(&ep->com.wr_wait.wait);
1204
1205        return 0;
1206}
1207
1208static int listen_stop(struct c4iw_listen_ep *ep)
1209{
1210        struct sk_buff *skb;
1211        struct cpl_close_listsvr_req *req;
1212
1213        PDBG("%s ep %p\n", __func__, ep);
1214        skb = get_skb(NULL, sizeof(*req), GFP_KERNEL);
1215        if (!skb) {
1216                printk(KERN_ERR MOD "%s - failed to alloc skb\n", __func__);
1217                return -ENOMEM;
1218        }
1219        req = (struct cpl_close_listsvr_req *) skb_put(skb, sizeof(*req));
1220        INIT_TP_WR(req, 0);
1221        OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_CLOSE_LISTSRV_REQ,
1222                                                    ep->stid));
1223        req->reply_ctrl = cpu_to_be16(
1224                          QUEUENO(ep->com.dev->rdev.lldi.rxq_ids[0]));
1225        set_wr_txq(skb, CPL_PRIORITY_SETUP, 0);
1226        return c4iw_ofld_send(&ep->com.dev->rdev, skb);
1227}
1228
1229static int close_listsrv_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
1230{
1231        struct cpl_close_listsvr_rpl *rpl = cplhdr(skb);
1232        struct tid_info *t = dev->rdev.lldi.tids;
1233        unsigned int stid = GET_TID(rpl);
1234        struct c4iw_listen_ep *ep = lookup_stid(t, stid);
1235
1236        PDBG("%s ep %p\n", __func__, ep);
1237        ep->com.wr_wait.ret = status2errno(rpl->status);
1238        ep->com.wr_wait.done = 1;
1239        wake_up(&ep->com.wr_wait.wait);
1240        return 0;
1241}
1242
1243static void accept_cr(struct c4iw_ep *ep, __be32 peer_ip, struct sk_buff *skb,
1244                      struct cpl_pass_accept_req *req)
1245{
1246        struct cpl_pass_accept_rpl *rpl;
1247        unsigned int mtu_idx;
1248        u64 opt0;
1249        u32 opt2;
1250        int wscale;
1251
1252        PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1253        BUG_ON(skb_cloned(skb));
1254        skb_trim(skb, sizeof(*rpl));
1255        skb_get(skb);
1256        cxgb4_best_mtu(ep->com.dev->rdev.lldi.mtus, ep->mtu, &mtu_idx);
1257        wscale = compute_wscale(rcv_win);
1258        opt0 = KEEP_ALIVE(1) |
1259               DELACK(1) |
1260               WND_SCALE(wscale) |
1261               MSS_IDX(mtu_idx) |
1262               L2T_IDX(ep->l2t->idx) |
1263               TX_CHAN(ep->tx_chan) |
1264               SMAC_SEL(ep->smac_idx) |
1265               DSCP(ep->tos) |
1266               ULP_MODE(ULP_MODE_TCPDDP) |
1267               RCV_BUFSIZ(rcv_win>>10);
1268        opt2 = RX_CHANNEL(0) |
1269               RSS_QUEUE_VALID | RSS_QUEUE(ep->rss_qid);
1270
1271        if (enable_tcp_timestamps && req->tcpopt.tstamp)
1272                opt2 |= TSTAMPS_EN(1);
1273        if (enable_tcp_sack && req->tcpopt.sack)
1274                opt2 |= SACK_EN(1);
1275        if (wscale && enable_tcp_window_scaling)
1276                opt2 |= WND_SCALE_EN(1);
1277
1278        rpl = cplhdr(skb);
1279        INIT_TP_WR(rpl, ep->hwtid);
1280        OPCODE_TID(rpl) = cpu_to_be32(MK_OPCODE_TID(CPL_PASS_ACCEPT_RPL,
1281                                      ep->hwtid));
1282        rpl->opt0 = cpu_to_be64(opt0);
1283        rpl->opt2 = cpu_to_be32(opt2);
1284        set_wr_txq(skb, CPL_PRIORITY_SETUP, ep->ctrlq_idx);
1285        c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
1286
1287        return;
1288}
1289
1290static void reject_cr(struct c4iw_dev *dev, u32 hwtid, __be32 peer_ip,
1291                      struct sk_buff *skb)
1292{
1293        PDBG("%s c4iw_dev %p tid %u peer_ip %x\n", __func__, dev, hwtid,
1294             peer_ip);
1295        BUG_ON(skb_cloned(skb));
1296        skb_trim(skb, sizeof(struct cpl_tid_release));
1297        skb_get(skb);
1298        release_tid(&dev->rdev, hwtid, skb);
1299        return;
1300}
1301
1302static void get_4tuple(struct cpl_pass_accept_req *req,
1303                       __be32 *local_ip, __be32 *peer_ip,
1304                       __be16 *local_port, __be16 *peer_port)
1305{
1306        int eth_len = G_ETH_HDR_LEN(be32_to_cpu(req->hdr_len));
1307        int ip_len = G_IP_HDR_LEN(be32_to_cpu(req->hdr_len));
1308        struct iphdr *ip = (struct iphdr *)((u8 *)(req + 1) + eth_len);
1309        struct tcphdr *tcp = (struct tcphdr *)
1310                             ((u8 *)(req + 1) + eth_len + ip_len);
1311
1312        PDBG("%s saddr 0x%x daddr 0x%x sport %u dport %u\n", __func__,
1313             ntohl(ip->saddr), ntohl(ip->daddr), ntohs(tcp->source),
1314             ntohs(tcp->dest));
1315
1316        *peer_ip = ip->saddr;
1317        *local_ip = ip->daddr;
1318        *peer_port = tcp->source;
1319        *local_port = tcp->dest;
1320
1321        return;
1322}
1323
1324static int pass_accept_req(struct c4iw_dev *dev, struct sk_buff *skb)
1325{
1326        struct c4iw_ep *child_ep, *parent_ep;
1327        struct cpl_pass_accept_req *req = cplhdr(skb);
1328        unsigned int stid = GET_POPEN_TID(ntohl(req->tos_stid));
1329        struct tid_info *t = dev->rdev.lldi.tids;
1330        unsigned int hwtid = GET_TID(req);
1331        struct dst_entry *dst;
1332        struct l2t_entry *l2t;
1333        struct rtable *rt;
1334        __be32 local_ip, peer_ip;
1335        __be16 local_port, peer_port;
1336        struct net_device *pdev;
1337        u32 tx_chan, smac_idx;
1338        u16 rss_qid;
1339        u32 mtu;
1340        int step;
1341        int txq_idx, ctrlq_idx;
1342
1343        parent_ep = lookup_stid(t, stid);
1344        PDBG("%s parent ep %p tid %u\n", __func__, parent_ep, hwtid);
1345
1346        get_4tuple(req, &local_ip, &peer_ip, &local_port, &peer_port);
1347
1348        if (state_read(&parent_ep->com) != LISTEN) {
1349                printk(KERN_ERR "%s - listening ep not in LISTEN\n",
1350                       __func__);
1351                goto reject;
1352        }
1353
1354        /* Find output route */
1355        rt = find_route(dev, local_ip, peer_ip, local_port, peer_port,
1356                        GET_POPEN_TOS(ntohl(req->tos_stid)));
1357        if (!rt) {
1358                printk(KERN_ERR MOD "%s - failed to find dst entry!\n",
1359                       __func__);
1360                goto reject;
1361        }
1362        dst = &rt->dst;
1363        if (dst->neighbour->dev->flags & IFF_LOOPBACK) {
1364                pdev = ip_dev_find(&init_net, peer_ip);
1365                BUG_ON(!pdev);
1366                l2t = cxgb4_l2t_get(dev->rdev.lldi.l2t, dst->neighbour,
1367                                    pdev, 0);
1368                mtu = pdev->mtu;
1369                tx_chan = cxgb4_port_chan(pdev);
1370                smac_idx = (cxgb4_port_viid(pdev) & 0x7F) << 1;
1371                step = dev->rdev.lldi.ntxq / dev->rdev.lldi.nchan;
1372                txq_idx = cxgb4_port_idx(pdev) * step;
1373                ctrlq_idx = cxgb4_port_idx(pdev);
1374                step = dev->rdev.lldi.nrxq / dev->rdev.lldi.nchan;
1375                rss_qid = dev->rdev.lldi.rxq_ids[cxgb4_port_idx(pdev) * step];
1376                dev_put(pdev);
1377        } else {
1378                l2t = cxgb4_l2t_get(dev->rdev.lldi.l2t, dst->neighbour,
1379                                        dst->neighbour->dev, 0);
1380                mtu = dst_mtu(dst);
1381                tx_chan = cxgb4_port_chan(dst->neighbour->dev);
1382                smac_idx = (cxgb4_port_viid(dst->neighbour->dev) & 0x7F) << 1;
1383                step = dev->rdev.lldi.ntxq / dev->rdev.lldi.nchan;
1384                txq_idx = cxgb4_port_idx(dst->neighbour->dev) * step;
1385                ctrlq_idx = cxgb4_port_idx(dst->neighbour->dev);
1386                step = dev->rdev.lldi.nrxq / dev->rdev.lldi.nchan;
1387                rss_qid = dev->rdev.lldi.rxq_ids[
1388                          cxgb4_port_idx(dst->neighbour->dev) * step];
1389        }
1390        if (!l2t) {
1391                printk(KERN_ERR MOD "%s - failed to allocate l2t entry!\n",
1392                       __func__);
1393                dst_release(dst);
1394                goto reject;
1395        }
1396
1397        child_ep = alloc_ep(sizeof(*child_ep), GFP_KERNEL);
1398        if (!child_ep) {
1399                printk(KERN_ERR MOD "%s - failed to allocate ep entry!\n",
1400                       __func__);
1401                cxgb4_l2t_release(l2t);
1402                dst_release(dst);
1403                goto reject;
1404        }
1405        state_set(&child_ep->com, CONNECTING);
1406        child_ep->com.dev = dev;
1407        child_ep->com.cm_id = NULL;
1408        child_ep->com.local_addr.sin_family = PF_INET;
1409        child_ep->com.local_addr.sin_port = local_port;
1410        child_ep->com.local_addr.sin_addr.s_addr = local_ip;
1411        child_ep->com.remote_addr.sin_family = PF_INET;
1412        child_ep->com.remote_addr.sin_port = peer_port;
1413        child_ep->com.remote_addr.sin_addr.s_addr = peer_ip;
1414        c4iw_get_ep(&parent_ep->com);
1415        child_ep->parent_ep = parent_ep;
1416        child_ep->tos = GET_POPEN_TOS(ntohl(req->tos_stid));
1417        child_ep->l2t = l2t;
1418        child_ep->dst = dst;
1419        child_ep->hwtid = hwtid;
1420        child_ep->tx_chan = tx_chan;
1421        child_ep->smac_idx = smac_idx;
1422        child_ep->rss_qid = rss_qid;
1423        child_ep->mtu = mtu;
1424        child_ep->txq_idx = txq_idx;
1425        child_ep->ctrlq_idx = ctrlq_idx;
1426
1427        PDBG("%s tx_chan %u smac_idx %u rss_qid %u\n", __func__,
1428             tx_chan, smac_idx, rss_qid);
1429
1430        init_timer(&child_ep->timer);
1431        cxgb4_insert_tid(t, child_ep, hwtid);
1432        accept_cr(child_ep, peer_ip, skb, req);
1433        goto out;
1434reject:
1435        reject_cr(dev, hwtid, peer_ip, skb);
1436out:
1437        return 0;
1438}
1439
1440static int pass_establish(struct c4iw_dev *dev, struct sk_buff *skb)
1441{
1442        struct c4iw_ep *ep;
1443        struct cpl_pass_establish *req = cplhdr(skb);
1444        struct tid_info *t = dev->rdev.lldi.tids;
1445        unsigned int tid = GET_TID(req);
1446
1447        ep = lookup_tid(t, tid);
1448        PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1449        ep->snd_seq = be32_to_cpu(req->snd_isn);
1450        ep->rcv_seq = be32_to_cpu(req->rcv_isn);
1451
1452        set_emss(ep, ntohs(req->tcp_opt));
1453
1454        dst_confirm(ep->dst);
1455        state_set(&ep->com, MPA_REQ_WAIT);
1456        start_ep_timer(ep);
1457        send_flowc(ep, skb);
1458
1459        return 0;
1460}
1461
1462static int peer_close(struct c4iw_dev *dev, struct sk_buff *skb)
1463{
1464        struct cpl_peer_close *hdr = cplhdr(skb);
1465        struct c4iw_ep *ep;
1466        struct c4iw_qp_attributes attrs;
1467        int disconnect = 1;
1468        int release = 0;
1469        int closing = 0;
1470        struct tid_info *t = dev->rdev.lldi.tids;
1471        unsigned int tid = GET_TID(hdr);
1472
1473        ep = lookup_tid(t, tid);
1474        PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1475        dst_confirm(ep->dst);
1476
1477        mutex_lock(&ep->com.mutex);
1478        switch (ep->com.state) {
1479        case MPA_REQ_WAIT:
1480                __state_set(&ep->com, CLOSING);
1481                break;
1482        case MPA_REQ_SENT:
1483                __state_set(&ep->com, CLOSING);
1484                connect_reply_upcall(ep, -ECONNRESET);
1485                break;
1486        case MPA_REQ_RCVD:
1487
1488                /*
1489                 * We're gonna mark this puppy DEAD, but keep
1490                 * the reference on it until the ULP accepts or
1491                 * rejects the CR. Also wake up anyone waiting
1492                 * in rdma connection migration (see c4iw_accept_cr()).
1493                 */
1494                __state_set(&ep->com, CLOSING);
1495                ep->com.wr_wait.done = 1;
1496                ep->com.wr_wait.ret = -ECONNRESET;
1497                PDBG("waking up ep %p tid %u\n", ep, ep->hwtid);
1498                wake_up(&ep->com.wr_wait.wait);
1499                break;
1500        case MPA_REP_SENT:
1501                __state_set(&ep->com, CLOSING);
1502                ep->com.wr_wait.done = 1;
1503                ep->com.wr_wait.ret = -ECONNRESET;
1504                PDBG("waking up ep %p tid %u\n", ep, ep->hwtid);
1505                wake_up(&ep->com.wr_wait.wait);
1506                break;
1507        case FPDU_MODE:
1508                start_ep_timer(ep);
1509                __state_set(&ep->com, CLOSING);
1510                closing = 1;
1511                peer_close_upcall(ep);
1512                break;
1513        case ABORTING:
1514                disconnect = 0;
1515                break;
1516        case CLOSING:
1517                __state_set(&ep->com, MORIBUND);
1518                disconnect = 0;
1519                break;
1520        case MORIBUND:
1521                stop_ep_timer(ep);
1522                if (ep->com.cm_id && ep->com.qp) {
1523                        attrs.next_state = C4IW_QP_STATE_IDLE;
1524                        c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
1525                                       C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
1526                }
1527                close_complete_upcall(ep);
1528                __state_set(&ep->com, DEAD);
1529                release = 1;
1530                disconnect = 0;
1531                break;
1532        case DEAD:
1533                disconnect = 0;
1534                break;
1535        default:
1536                BUG_ON(1);
1537        }
1538        mutex_unlock(&ep->com.mutex);
1539        if (closing) {
1540                attrs.next_state = C4IW_QP_STATE_CLOSING;
1541                c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
1542                               C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
1543        }
1544        if (disconnect)
1545                c4iw_ep_disconnect(ep, 0, GFP_KERNEL);
1546        if (release)
1547                release_ep_resources(ep);
1548        return 0;
1549}
1550
1551/*
1552 * Returns whether an ABORT_REQ_RSS message is a negative advice.
1553 */
1554static int is_neg_adv_abort(unsigned int status)
1555{
1556        return status == CPL_ERR_RTX_NEG_ADVICE ||
1557               status == CPL_ERR_PERSIST_NEG_ADVICE;
1558}
1559
1560static int peer_abort(struct c4iw_dev *dev, struct sk_buff *skb)
1561{
1562        struct cpl_abort_req_rss *req = cplhdr(skb);
1563        struct c4iw_ep *ep;
1564        struct cpl_abort_rpl *rpl;
1565        struct sk_buff *rpl_skb;
1566        struct c4iw_qp_attributes attrs;
1567        int ret;
1568        int release = 0;
1569        struct tid_info *t = dev->rdev.lldi.tids;
1570        unsigned int tid = GET_TID(req);
1571
1572        ep = lookup_tid(t, tid);
1573        if (is_neg_adv_abort(req->status)) {
1574                PDBG("%s neg_adv_abort ep %p tid %u\n", __func__, ep,
1575                     ep->hwtid);
1576                return 0;
1577        }
1578        PDBG("%s ep %p tid %u state %u\n", __func__, ep, ep->hwtid,
1579             ep->com.state);
1580
1581        /*
1582         * Wake up any threads in rdma_init() or rdma_fini().
1583         */
1584        ep->com.wr_wait.done = 1;
1585        ep->com.wr_wait.ret = -ECONNRESET;
1586        wake_up(&ep->com.wr_wait.wait);
1587
1588        mutex_lock(&ep->com.mutex);
1589        switch (ep->com.state) {
1590        case CONNECTING:
1591                break;
1592        case MPA_REQ_WAIT:
1593                stop_ep_timer(ep);
1594                break;
1595        case MPA_REQ_SENT:
1596                stop_ep_timer(ep);
1597                connect_reply_upcall(ep, -ECONNRESET);
1598                break;
1599        case MPA_REP_SENT:
1600                break;
1601        case MPA_REQ_RCVD:
1602                break;
1603        case MORIBUND:
1604        case CLOSING:
1605                stop_ep_timer(ep);
1606                /*FALLTHROUGH*/
1607        case FPDU_MODE:
1608                if (ep->com.cm_id && ep->com.qp) {
1609                        attrs.next_state = C4IW_QP_STATE_ERROR;
1610                        ret = c4iw_modify_qp(ep->com.qp->rhp,
1611                                     ep->com.qp, C4IW_QP_ATTR_NEXT_STATE,
1612                                     &attrs, 1);
1613                        if (ret)
1614                                printk(KERN_ERR MOD
1615                                       "%s - qp <- error failed!\n",
1616                                       __func__);
1617                }
1618                peer_abort_upcall(ep);
1619                break;
1620        case ABORTING:
1621                break;
1622        case DEAD:
1623                PDBG("%s PEER_ABORT IN DEAD STATE!!!!\n", __func__);
1624                mutex_unlock(&ep->com.mutex);
1625                return 0;
1626        default:
1627                BUG_ON(1);
1628                break;
1629        }
1630        dst_confirm(ep->dst);
1631        if (ep->com.state != ABORTING) {
1632                __state_set(&ep->com, DEAD);
1633                release = 1;
1634        }
1635        mutex_unlock(&ep->com.mutex);
1636
1637        rpl_skb = get_skb(skb, sizeof(*rpl), GFP_KERNEL);
1638        if (!rpl_skb) {
1639                printk(KERN_ERR MOD "%s - cannot allocate skb!\n",
1640                       __func__);
1641                release = 1;
1642                goto out;
1643        }
1644        set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
1645        rpl = (struct cpl_abort_rpl *) skb_put(rpl_skb, sizeof(*rpl));
1646        INIT_TP_WR(rpl, ep->hwtid);
1647        OPCODE_TID(rpl) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_RPL, ep->hwtid));
1648        rpl->cmd = CPL_ABORT_NO_RST;
1649        c4iw_ofld_send(&ep->com.dev->rdev, rpl_skb);
1650out:
1651        if (release)
1652                release_ep_resources(ep);
1653        return 0;
1654}
1655
1656static int close_con_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
1657{
1658        struct c4iw_ep *ep;
1659        struct c4iw_qp_attributes attrs;
1660        struct cpl_close_con_rpl *rpl = cplhdr(skb);
1661        int release = 0;
1662        struct tid_info *t = dev->rdev.lldi.tids;
1663        unsigned int tid = GET_TID(rpl);
1664
1665        ep = lookup_tid(t, tid);
1666
1667        PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1668        BUG_ON(!ep);
1669
1670        /* The cm_id may be null if we failed to connect */
1671        mutex_lock(&ep->com.mutex);
1672        switch (ep->com.state) {
1673        case CLOSING:
1674                __state_set(&ep->com, MORIBUND);
1675                break;
1676        case MORIBUND:
1677                stop_ep_timer(ep);
1678                if ((ep->com.cm_id) && (ep->com.qp)) {
1679                        attrs.next_state = C4IW_QP_STATE_IDLE;
1680                        c4iw_modify_qp(ep->com.qp->rhp,
1681                                             ep->com.qp,
1682                                             C4IW_QP_ATTR_NEXT_STATE,
1683                                             &attrs, 1);
1684                }
1685                close_complete_upcall(ep);
1686                __state_set(&ep->com, DEAD);
1687                release = 1;
1688                break;
1689        case ABORTING:
1690        case DEAD:
1691                break;
1692        default:
1693                BUG_ON(1);
1694                break;
1695        }
1696        mutex_unlock(&ep->com.mutex);
1697        if (release)
1698                release_ep_resources(ep);
1699        return 0;
1700}
1701
1702static int terminate(struct c4iw_dev *dev, struct sk_buff *skb)
1703{
1704        struct cpl_rdma_terminate *rpl = cplhdr(skb);
1705        struct tid_info *t = dev->rdev.lldi.tids;
1706        unsigned int tid = GET_TID(rpl);
1707        struct c4iw_ep *ep;
1708        struct c4iw_qp_attributes attrs;
1709
1710        ep = lookup_tid(t, tid);
1711        BUG_ON(!ep);
1712
1713        if (ep->com.qp) {
1714                printk(KERN_WARNING MOD "TERM received tid %u qpid %u\n", tid,
1715                       ep->com.qp->wq.sq.qid);
1716                attrs.next_state = C4IW_QP_STATE_TERMINATE;
1717                c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
1718                               C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
1719        } else
1720                printk(KERN_WARNING MOD "TERM received tid %u no qp\n", tid);
1721
1722        return 0;
1723}
1724
1725/*
1726 * Upcall from the adapter indicating data has been transmitted.
1727 * For us its just the single MPA request or reply.  We can now free
1728 * the skb holding the mpa message.
1729 */
1730static int fw4_ack(struct c4iw_dev *dev, struct sk_buff *skb)
1731{
1732        struct c4iw_ep *ep;
1733        struct cpl_fw4_ack *hdr = cplhdr(skb);
1734        u8 credits = hdr->credits;
1735        unsigned int tid = GET_TID(hdr);
1736        struct tid_info *t = dev->rdev.lldi.tids;
1737
1738
1739        ep = lookup_tid(t, tid);
1740        PDBG("%s ep %p tid %u credits %u\n", __func__, ep, ep->hwtid, credits);
1741        if (credits == 0) {
1742                PDBG("%s 0 credit ack ep %p tid %u state %u\n",
1743                     __func__, ep, ep->hwtid, state_read(&ep->com));
1744                return 0;
1745        }
1746
1747        dst_confirm(ep->dst);
1748        if (ep->mpa_skb) {
1749                PDBG("%s last streaming msg ack ep %p tid %u state %u "
1750                     "initiator %u freeing skb\n", __func__, ep, ep->hwtid,
1751                     state_read(&ep->com), ep->mpa_attr.initiator ? 1 : 0);
1752                kfree_skb(ep->mpa_skb);
1753                ep->mpa_skb = NULL;
1754        }
1755        return 0;
1756}
1757
1758int c4iw_reject_cr(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
1759{
1760        int err;
1761        struct c4iw_ep *ep = to_ep(cm_id);
1762        PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1763
1764        if (state_read(&ep->com) == DEAD) {
1765                c4iw_put_ep(&ep->com);
1766                return -ECONNRESET;
1767        }
1768        BUG_ON(state_read(&ep->com) != MPA_REQ_RCVD);
1769        if (mpa_rev == 0)
1770                abort_connection(ep, NULL, GFP_KERNEL);
1771        else {
1772                err = send_mpa_reject(ep, pdata, pdata_len);
1773                err = c4iw_ep_disconnect(ep, 0, GFP_KERNEL);
1774        }
1775        c4iw_put_ep(&ep->com);
1776        return 0;
1777}
1778
1779int c4iw_accept_cr(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
1780{
1781        int err;
1782        struct c4iw_qp_attributes attrs;
1783        enum c4iw_qp_attr_mask mask;
1784        struct c4iw_ep *ep = to_ep(cm_id);
1785        struct c4iw_dev *h = to_c4iw_dev(cm_id->device);
1786        struct c4iw_qp *qp = get_qhp(h, conn_param->qpn);
1787
1788        PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1789        if (state_read(&ep->com) == DEAD) {
1790                err = -ECONNRESET;
1791                goto err;
1792        }
1793
1794        BUG_ON(state_read(&ep->com) != MPA_REQ_RCVD);
1795        BUG_ON(!qp);
1796
1797        if ((conn_param->ord > c4iw_max_read_depth) ||
1798            (conn_param->ird > c4iw_max_read_depth)) {
1799                abort_connection(ep, NULL, GFP_KERNEL);
1800                err = -EINVAL;
1801                goto err;
1802        }
1803
1804        cm_id->add_ref(cm_id);
1805        ep->com.cm_id = cm_id;
1806        ep->com.qp = qp;
1807
1808        ep->ird = conn_param->ird;
1809        ep->ord = conn_param->ord;
1810
1811        if (peer2peer && ep->ird == 0)
1812                ep->ird = 1;
1813
1814        PDBG("%s %d ird %d ord %d\n", __func__, __LINE__, ep->ird, ep->ord);
1815
1816        /* bind QP to EP and move to RTS */
1817        attrs.mpa_attr = ep->mpa_attr;
1818        attrs.max_ird = ep->ird;
1819        attrs.max_ord = ep->ord;
1820        attrs.llp_stream_handle = ep;
1821        attrs.next_state = C4IW_QP_STATE_RTS;
1822
1823        /* bind QP and TID with INIT_WR */
1824        mask = C4IW_QP_ATTR_NEXT_STATE |
1825                             C4IW_QP_ATTR_LLP_STREAM_HANDLE |
1826                             C4IW_QP_ATTR_MPA_ATTR |
1827                             C4IW_QP_ATTR_MAX_IRD |
1828                             C4IW_QP_ATTR_MAX_ORD;
1829
1830        err = c4iw_modify_qp(ep->com.qp->rhp,
1831                             ep->com.qp, mask, &attrs, 1);
1832        if (err)
1833                goto err1;
1834        err = send_mpa_reply(ep, conn_param->private_data,
1835                             conn_param->private_data_len);
1836        if (err)
1837                goto err1;
1838
1839        state_set(&ep->com, FPDU_MODE);
1840        established_upcall(ep);
1841        c4iw_put_ep(&ep->com);
1842        return 0;
1843err1:
1844        ep->com.cm_id = NULL;
1845        ep->com.qp = NULL;
1846        cm_id->rem_ref(cm_id);
1847err:
1848        c4iw_put_ep(&ep->com);
1849        return err;
1850}
1851
1852int c4iw_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
1853{
1854        int err = 0;
1855        struct c4iw_dev *dev = to_c4iw_dev(cm_id->device);
1856        struct c4iw_ep *ep;
1857        struct rtable *rt;
1858        struct net_device *pdev;
1859        int step;
1860
1861        if ((conn_param->ord > c4iw_max_read_depth) ||
1862            (conn_param->ird > c4iw_max_read_depth)) {
1863                err = -EINVAL;
1864                goto out;
1865        }
1866        ep = alloc_ep(sizeof(*ep), GFP_KERNEL);
1867        if (!ep) {
1868                printk(KERN_ERR MOD "%s - cannot alloc ep.\n", __func__);
1869                err = -ENOMEM;
1870                goto out;
1871        }
1872        init_timer(&ep->timer);
1873        ep->plen = conn_param->private_data_len;
1874        if (ep->plen)
1875                memcpy(ep->mpa_pkt + sizeof(struct mpa_message),
1876                       conn_param->private_data, ep->plen);
1877        ep->ird = conn_param->ird;
1878        ep->ord = conn_param->ord;
1879
1880        if (peer2peer && ep->ord == 0)
1881                ep->ord = 1;
1882
1883        cm_id->add_ref(cm_id);
1884        ep->com.dev = dev;
1885        ep->com.cm_id = cm_id;
1886        ep->com.qp = get_qhp(dev, conn_param->qpn);
1887        BUG_ON(!ep->com.qp);
1888        PDBG("%s qpn 0x%x qp %p cm_id %p\n", __func__, conn_param->qpn,
1889             ep->com.qp, cm_id);
1890
1891        /*
1892         * Allocate an active TID to initiate a TCP connection.
1893         */
1894        ep->atid = cxgb4_alloc_atid(dev->rdev.lldi.tids, ep);
1895        if (ep->atid == -1) {
1896                printk(KERN_ERR MOD "%s - cannot alloc atid.\n", __func__);
1897                err = -ENOMEM;
1898                goto fail2;
1899        }
1900
1901        PDBG("%s saddr 0x%x sport 0x%x raddr 0x%x rport 0x%x\n", __func__,
1902             ntohl(cm_id->local_addr.sin_addr.s_addr),
1903             ntohs(cm_id->local_addr.sin_port),
1904             ntohl(cm_id->remote_addr.sin_addr.s_addr),
1905             ntohs(cm_id->remote_addr.sin_port));
1906
1907        /* find a route */
1908        rt = find_route(dev,
1909                        cm_id->local_addr.sin_addr.s_addr,
1910                        cm_id->remote_addr.sin_addr.s_addr,
1911                        cm_id->local_addr.sin_port,
1912                        cm_id->remote_addr.sin_port, 0);
1913        if (!rt) {
1914                printk(KERN_ERR MOD "%s - cannot find route.\n", __func__);
1915                err = -EHOSTUNREACH;
1916                goto fail3;
1917        }
1918        ep->dst = &rt->dst;
1919
1920        /* get a l2t entry */
1921        if (ep->dst->neighbour->dev->flags & IFF_LOOPBACK) {
1922                PDBG("%s LOOPBACK\n", __func__);
1923                pdev = ip_dev_find(&init_net,
1924                                   cm_id->remote_addr.sin_addr.s_addr);
1925                ep->l2t = cxgb4_l2t_get(ep->com.dev->rdev.lldi.l2t,
1926                                        ep->dst->neighbour,
1927                                        pdev, 0);
1928                ep->mtu = pdev->mtu;
1929                ep->tx_chan = cxgb4_port_chan(pdev);
1930                ep->smac_idx = (cxgb4_port_viid(pdev) & 0x7F) << 1;
1931                step = ep->com.dev->rdev.lldi.ntxq /
1932                       ep->com.dev->rdev.lldi.nchan;
1933                ep->txq_idx = cxgb4_port_idx(pdev) * step;
1934                step = ep->com.dev->rdev.lldi.nrxq /
1935                       ep->com.dev->rdev.lldi.nchan;
1936                ep->ctrlq_idx = cxgb4_port_idx(pdev);
1937                ep->rss_qid = ep->com.dev->rdev.lldi.rxq_ids[
1938                              cxgb4_port_idx(pdev) * step];
1939                dev_put(pdev);
1940        } else {
1941                ep->l2t = cxgb4_l2t_get(ep->com.dev->rdev.lldi.l2t,
1942                                        ep->dst->neighbour,
1943                                        ep->dst->neighbour->dev, 0);
1944                ep->mtu = dst_mtu(ep->dst);
1945                ep->tx_chan = cxgb4_port_chan(ep->dst->neighbour->dev);
1946                ep->smac_idx = (cxgb4_port_viid(ep->dst->neighbour->dev) &
1947                                0x7F) << 1;
1948                step = ep->com.dev->rdev.lldi.ntxq /
1949                       ep->com.dev->rdev.lldi.nchan;
1950                ep->txq_idx = cxgb4_port_idx(ep->dst->neighbour->dev) * step;
1951                ep->ctrlq_idx = cxgb4_port_idx(ep->dst->neighbour->dev);
1952                step = ep->com.dev->rdev.lldi.nrxq /
1953                       ep->com.dev->rdev.lldi.nchan;
1954                ep->rss_qid = ep->com.dev->rdev.lldi.rxq_ids[
1955                              cxgb4_port_idx(ep->dst->neighbour->dev) * step];
1956        }
1957        if (!ep->l2t) {
1958                printk(KERN_ERR MOD "%s - cannot alloc l2e.\n", __func__);
1959                err = -ENOMEM;
1960                goto fail4;
1961        }
1962
1963        PDBG("%s txq_idx %u tx_chan %u smac_idx %u rss_qid %u l2t_idx %u\n",
1964                __func__, ep->txq_idx, ep->tx_chan, ep->smac_idx, ep->rss_qid,
1965                ep->l2t->idx);
1966
1967        state_set(&ep->com, CONNECTING);
1968        ep->tos = 0;
1969        ep->com.local_addr = cm_id->local_addr;
1970        ep->com.remote_addr = cm_id->remote_addr;
1971
1972        /* send connect request to rnic */
1973        err = send_connect(ep);
1974        if (!err)
1975                goto out;
1976
1977        cxgb4_l2t_release(ep->l2t);
1978fail4:
1979        dst_release(ep->dst);
1980fail3:
1981        cxgb4_free_atid(ep->com.dev->rdev.lldi.tids, ep->atid);
1982fail2:
1983        cm_id->rem_ref(cm_id);
1984        c4iw_put_ep(&ep->com);
1985out:
1986        return err;
1987}
1988
1989int c4iw_create_listen(struct iw_cm_id *cm_id, int backlog)
1990{
1991        int err = 0;
1992        struct c4iw_dev *dev = to_c4iw_dev(cm_id->device);
1993        struct c4iw_listen_ep *ep;
1994
1995
1996        might_sleep();
1997
1998        ep = alloc_ep(sizeof(*ep), GFP_KERNEL);
1999        if (!ep) {
2000                printk(KERN_ERR MOD "%s - cannot alloc ep.\n", __func__);
2001                err = -ENOMEM;
2002                goto fail1;
2003        }
2004        PDBG("%s ep %p\n", __func__, ep);
2005        cm_id->add_ref(cm_id);
2006        ep->com.cm_id = cm_id;
2007        ep->com.dev = dev;
2008        ep->backlog = backlog;
2009        ep->com.local_addr = cm_id->local_addr;
2010
2011        /*
2012         * Allocate a server TID.
2013         */
2014        ep->stid = cxgb4_alloc_stid(dev->rdev.lldi.tids, PF_INET, ep);
2015        if (ep->stid == -1) {
2016                printk(KERN_ERR MOD "%s - cannot alloc stid.\n", __func__);
2017                err = -ENOMEM;
2018                goto fail2;
2019        }
2020
2021        state_set(&ep->com, LISTEN);
2022        c4iw_init_wr_wait(&ep->com.wr_wait);
2023        err = cxgb4_create_server(ep->com.dev->rdev.lldi.ports[0], ep->stid,
2024                                  ep->com.local_addr.sin_addr.s_addr,
2025                                  ep->com.local_addr.sin_port,
2026                                  ep->com.dev->rdev.lldi.rxq_ids[0]);
2027        if (err)
2028                goto fail3;
2029
2030        /* wait for pass_open_rpl */
2031        err = c4iw_wait_for_reply(&ep->com.dev->rdev, &ep->com.wr_wait, 0, 0,
2032                                  __func__);
2033        if (!err) {
2034                cm_id->provider_data = ep;
2035                goto out;
2036        }
2037fail3:
2038        cxgb4_free_stid(ep->com.dev->rdev.lldi.tids, ep->stid, PF_INET);
2039fail2:
2040        cm_id->rem_ref(cm_id);
2041        c4iw_put_ep(&ep->com);
2042fail1:
2043out:
2044        return err;
2045}
2046
2047int c4iw_destroy_listen(struct iw_cm_id *cm_id)
2048{
2049        int err;
2050        struct c4iw_listen_ep *ep = to_listen_ep(cm_id);
2051
2052        PDBG("%s ep %p\n", __func__, ep);
2053
2054        might_sleep();
2055        state_set(&ep->com, DEAD);
2056        c4iw_init_wr_wait(&ep->com.wr_wait);
2057        err = listen_stop(ep);
2058        if (err)
2059                goto done;
2060        err = c4iw_wait_for_reply(&ep->com.dev->rdev, &ep->com.wr_wait, 0, 0,
2061                                  __func__);
2062        cxgb4_free_stid(ep->com.dev->rdev.lldi.tids, ep->stid, PF_INET);
2063done:
2064        cm_id->rem_ref(cm_id);
2065        c4iw_put_ep(&ep->com);
2066        return err;
2067}
2068
2069int c4iw_ep_disconnect(struct c4iw_ep *ep, int abrupt, gfp_t gfp)
2070{
2071        int ret = 0;
2072        int close = 0;
2073        int fatal = 0;
2074        struct c4iw_rdev *rdev;
2075
2076        mutex_lock(&ep->com.mutex);
2077
2078        PDBG("%s ep %p state %s, abrupt %d\n", __func__, ep,
2079             states[ep->com.state], abrupt);
2080
2081        rdev = &ep->com.dev->rdev;
2082        if (c4iw_fatal_error(rdev)) {
2083                fatal = 1;
2084                close_complete_upcall(ep);
2085                ep->com.state = DEAD;
2086        }
2087        switch (ep->com.state) {
2088        case MPA_REQ_WAIT:
2089        case MPA_REQ_SENT:
2090        case MPA_REQ_RCVD:
2091        case MPA_REP_SENT:
2092        case FPDU_MODE:
2093                close = 1;
2094                if (abrupt)
2095                        ep->com.state = ABORTING;
2096                else {
2097                        ep->com.state = CLOSING;
2098                        start_ep_timer(ep);
2099                }
2100                set_bit(CLOSE_SENT, &ep->com.flags);
2101                break;
2102        case CLOSING:
2103                if (!test_and_set_bit(CLOSE_SENT, &ep->com.flags)) {
2104                        close = 1;
2105                        if (abrupt) {
2106                                stop_ep_timer(ep);
2107                                ep->com.state = ABORTING;
2108                        } else
2109                                ep->com.state = MORIBUND;
2110                }
2111                break;
2112        case MORIBUND:
2113        case ABORTING:
2114        case DEAD:
2115                PDBG("%s ignoring disconnect ep %p state %u\n",
2116                     __func__, ep, ep->com.state);
2117                break;
2118        default:
2119                BUG();
2120                break;
2121        }
2122
2123        mutex_unlock(&ep->com.mutex);
2124        if (close) {
2125                if (abrupt)
2126                        ret = abort_connection(ep, NULL, gfp);
2127                else
2128                        ret = send_halfclose(ep, gfp);
2129                if (ret)
2130                        fatal = 1;
2131        }
2132        if (fatal)
2133                release_ep_resources(ep);
2134        return ret;
2135}
2136
2137static int async_event(struct c4iw_dev *dev, struct sk_buff *skb)
2138{
2139        struct cpl_fw6_msg *rpl = cplhdr(skb);
2140        c4iw_ev_dispatch(dev, (struct t4_cqe *)&rpl->data[0]);
2141        return 0;
2142}
2143
2144/*
2145 * These are the real handlers that are called from a
2146 * work queue.
2147 */
2148static c4iw_handler_func work_handlers[NUM_CPL_CMDS] = {
2149        [CPL_ACT_ESTABLISH] = act_establish,
2150        [CPL_ACT_OPEN_RPL] = act_open_rpl,
2151        [CPL_RX_DATA] = rx_data,
2152        [CPL_ABORT_RPL_RSS] = abort_rpl,
2153        [CPL_ABORT_RPL] = abort_rpl,
2154        [CPL_PASS_OPEN_RPL] = pass_open_rpl,
2155        [CPL_CLOSE_LISTSRV_RPL] = close_listsrv_rpl,
2156        [CPL_PASS_ACCEPT_REQ] = pass_accept_req,
2157        [CPL_PASS_ESTABLISH] = pass_establish,
2158        [CPL_PEER_CLOSE] = peer_close,
2159        [CPL_ABORT_REQ_RSS] = peer_abort,
2160        [CPL_CLOSE_CON_RPL] = close_con_rpl,
2161        [CPL_RDMA_TERMINATE] = terminate,
2162        [CPL_FW4_ACK] = fw4_ack,
2163        [CPL_FW6_MSG] = async_event
2164};
2165
2166static void process_timeout(struct c4iw_ep *ep)
2167{
2168        struct c4iw_qp_attributes attrs;
2169        int abort = 1;
2170
2171        mutex_lock(&ep->com.mutex);
2172        PDBG("%s ep %p tid %u state %d\n", __func__, ep, ep->hwtid,
2173             ep->com.state);
2174        switch (ep->com.state) {
2175        case MPA_REQ_SENT:
2176                __state_set(&ep->com, ABORTING);
2177                connect_reply_upcall(ep, -ETIMEDOUT);
2178                break;
2179        case MPA_REQ_WAIT:
2180                __state_set(&ep->com, ABORTING);
2181                break;
2182        case CLOSING:
2183        case MORIBUND:
2184                if (ep->com.cm_id && ep->com.qp) {
2185                        attrs.next_state = C4IW_QP_STATE_ERROR;
2186                        c4iw_modify_qp(ep->com.qp->rhp,
2187                                     ep->com.qp, C4IW_QP_ATTR_NEXT_STATE,
2188                                     &attrs, 1);
2189                }
2190                __state_set(&ep->com, ABORTING);
2191                break;
2192        default:
2193                printk(KERN_ERR "%s unexpected state ep %p tid %u state %u\n",
2194                        __func__, ep, ep->hwtid, ep->com.state);
2195                WARN_ON(1);
2196                abort = 0;
2197        }
2198        mutex_unlock(&ep->com.mutex);
2199        if (abort)
2200                abort_connection(ep, NULL, GFP_KERNEL);
2201        c4iw_put_ep(&ep->com);
2202}
2203
2204static void process_timedout_eps(void)
2205{
2206        struct c4iw_ep *ep;
2207
2208        spin_lock_irq(&timeout_lock);
2209        while (!list_empty(&timeout_list)) {
2210                struct list_head *tmp;
2211
2212                tmp = timeout_list.next;
2213                list_del(tmp);
2214                spin_unlock_irq(&timeout_lock);
2215                ep = list_entry(tmp, struct c4iw_ep, entry);
2216                process_timeout(ep);
2217                spin_lock_irq(&timeout_lock);
2218        }
2219        spin_unlock_irq(&timeout_lock);
2220}
2221
2222static void process_work(struct work_struct *work)
2223{
2224        struct sk_buff *skb = NULL;
2225        struct c4iw_dev *dev;
2226        struct cpl_act_establish *rpl;
2227        unsigned int opcode;
2228        int ret;
2229
2230        while ((skb = skb_dequeue(&rxq))) {
2231                rpl = cplhdr(skb);
2232                dev = *((struct c4iw_dev **) (skb->cb + sizeof(void *)));
2233                opcode = rpl->ot.opcode;
2234
2235                BUG_ON(!work_handlers[opcode]);
2236                ret = work_handlers[opcode](dev, skb);
2237                if (!ret)
2238                        kfree_skb(skb);
2239        }
2240        process_timedout_eps();
2241}
2242
2243static DECLARE_WORK(skb_work, process_work);
2244
2245static void ep_timeout(unsigned long arg)
2246{
2247        struct c4iw_ep *ep = (struct c4iw_ep *)arg;
2248
2249        spin_lock(&timeout_lock);
2250        list_add_tail(&ep->entry, &timeout_list);
2251        spin_unlock(&timeout_lock);
2252        queue_work(workq, &skb_work);
2253}
2254
2255/*
2256 * All the CM events are handled on a work queue to have a safe context.
2257 */
2258static int sched(struct c4iw_dev *dev, struct sk_buff *skb)
2259{
2260
2261        /*
2262         * Save dev in the skb->cb area.
2263         */
2264        *((struct c4iw_dev **) (skb->cb + sizeof(void *))) = dev;
2265
2266        /*
2267         * Queue the skb and schedule the worker thread.
2268         */
2269        skb_queue_tail(&rxq, skb);
2270        queue_work(workq, &skb_work);
2271        return 0;
2272}
2273
2274static int set_tcb_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
2275{
2276        struct cpl_set_tcb_rpl *rpl = cplhdr(skb);
2277
2278        if (rpl->status != CPL_ERR_NONE) {
2279                printk(KERN_ERR MOD "Unexpected SET_TCB_RPL status %u "
2280                       "for tid %u\n", rpl->status, GET_TID(rpl));
2281        }
2282        kfree_skb(skb);
2283        return 0;
2284}
2285
2286static int fw6_msg(struct c4iw_dev *dev, struct sk_buff *skb)
2287{
2288        struct cpl_fw6_msg *rpl = cplhdr(skb);
2289        struct c4iw_wr_wait *wr_waitp;
2290        int ret;
2291
2292        PDBG("%s type %u\n", __func__, rpl->type);
2293
2294        switch (rpl->type) {
2295        case 1:
2296                ret = (int)((be64_to_cpu(rpl->data[0]) >> 8) & 0xff);
2297                wr_waitp = (struct c4iw_wr_wait *)(__force unsigned long) rpl->data[1];
2298                PDBG("%s wr_waitp %p ret %u\n", __func__, wr_waitp, ret);
2299                if (wr_waitp) {
2300                        if (ret)
2301                                wr_waitp->ret = -ret;
2302                        else
2303                                wr_waitp->ret = 0;
2304                        wr_waitp->done = 1;
2305                        wake_up(&wr_waitp->wait);
2306                }
2307                kfree_skb(skb);
2308                break;
2309        case 2:
2310                sched(dev, skb);
2311                break;
2312        default:
2313                printk(KERN_ERR MOD "%s unexpected fw6 msg type %u\n", __func__,
2314                       rpl->type);
2315                kfree_skb(skb);
2316                break;
2317        }
2318        return 0;
2319}
2320
2321/*
2322 * Most upcalls from the T4 Core go to sched() to
2323 * schedule the processing on a work queue.
2324 */
2325c4iw_handler_func c4iw_handlers[NUM_CPL_CMDS] = {
2326        [CPL_ACT_ESTABLISH] = sched,
2327        [CPL_ACT_OPEN_RPL] = sched,
2328        [CPL_RX_DATA] = sched,
2329        [CPL_ABORT_RPL_RSS] = sched,
2330        [CPL_ABORT_RPL] = sched,
2331        [CPL_PASS_OPEN_RPL] = sched,
2332        [CPL_CLOSE_LISTSRV_RPL] = sched,
2333        [CPL_PASS_ACCEPT_REQ] = sched,
2334        [CPL_PASS_ESTABLISH] = sched,
2335        [CPL_PEER_CLOSE] = sched,
2336        [CPL_CLOSE_CON_RPL] = sched,
2337        [CPL_ABORT_REQ_RSS] = sched,
2338        [CPL_RDMA_TERMINATE] = sched,
2339        [CPL_FW4_ACK] = sched,
2340        [CPL_SET_TCB_RPL] = set_tcb_rpl,
2341        [CPL_FW6_MSG] = fw6_msg
2342};
2343
2344int __init c4iw_cm_init(void)
2345{
2346        spin_lock_init(&timeout_lock);
2347        skb_queue_head_init(&rxq);
2348
2349        workq = create_singlethread_workqueue("iw_cxgb4");
2350        if (!workq)
2351                return -ENOMEM;
2352
2353        return 0;
2354}
2355
2356void __exit c4iw_cm_term(void)
2357{
2358        WARN_ON(!list_empty(&timeout_list));
2359        flush_workqueue(workq);
2360        destroy_workqueue(workq);
2361}
2362