cxgb3_offload.c

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/*
 * Copyright (c) 2006-2008 Chelsio, Inc. All rights reserved.
 *
 * This software is available to you under a choice of one of two
 * licenses.  You may choose to be licensed under the terms of the GNU
 * General Public License (GPL) Version 2, available from the file
 * COPYING in the main directory of this source tree, or the
 * OpenIB.org BSD license below:
 *
 *     Redistribution and use in source and binary forms, with or
 *     without modification, are permitted provided that the following
 *     conditions are met:
 *
 *      - Redistributions of source code must retain the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer.
 *
 *      - Redistributions in binary form must reproduce the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer in the documentation and/or other materials
 *        provided with the distribution.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

#include <linux/list.h>
#include <linux/slab.h>
#include <net/neighbour.h>
#include <linux/notifier.h>
#include <linux/atomic.h>
#include <linux/proc_fs.h>
#include <linux/if_vlan.h>
#include <net/netevent.h>
#include <linux/highmem.h>
#include <linux/vmalloc.h>
#include <linux/export.h>

#include "common.h"
#include "regs.h"
#include "cxgb3_ioctl.h"
#include "cxgb3_ctl_defs.h"
#include "cxgb3_defs.h"
#include "l2t.h"
#include "firmware_exports.h"
#include "cxgb3_offload.h"

static LIST_HEAD(client_list);
static LIST_HEAD(ofld_dev_list);
static DEFINE_MUTEX(cxgb3_db_lock);

static DEFINE_RWLOCK(adapter_list_lock);
static LIST_HEAD(adapter_list);

static const unsigned int MAX_ATIDS = 64 * 1024;
static const unsigned int ATID_BASE = 0x10000;

static void cxgb_neigh_update(struct neighbour *neigh);
static void cxgb_redirect(struct dst_entry *old, struct neighbour *old_neigh,
              struct dst_entry *new, struct neighbour *new_neigh,
              const void *daddr);

static inline int offload_activated(struct t3cdev *tdev)
{
    const struct adapter *adapter = tdev2adap(tdev);

    return test_bit(OFFLOAD_DEVMAP_BIT, &adapter->open_device_map);
}

void cxgb3_register_client(struct cxgb3_client *client)
{
    struct t3cdev *tdev;

    mutex_lock(&cxgb3_db_lock);
    list_add_tail(&client->client_list, &client_list);

    if (client->add) {
        list_for_each_entry(tdev, &ofld_dev_list, ofld_dev_list) {
            if (offload_activated(tdev))
                client->add(tdev);
        }
    }
    mutex_unlock(&cxgb3_db_lock);
}

EXPORT_SYMBOL(cxgb3_register_client);

void cxgb3_unregister_client(struct cxgb3_client *client)
{
    struct t3cdev *tdev;

    mutex_lock(&cxgb3_db_lock);
    list_del(&client->client_list);

    if (client->remove) {
        list_for_each_entry(tdev, &ofld_dev_list, ofld_dev_list) {
            if (offload_activated(tdev))
                client->remove(tdev);
        }
    }
    mutex_unlock(&cxgb3_db_lock);
}

EXPORT_SYMBOL(cxgb3_unregister_client);

void cxgb3_add_clients(struct t3cdev *tdev)
{
    struct cxgb3_client *client;

    mutex_lock(&cxgb3_db_lock);
    list_for_each_entry(client, &client_list, client_list) {
        if (client->add)
            client->add(tdev);
    }
    mutex_unlock(&cxgb3_db_lock);
}

void cxgb3_remove_clients(struct t3cdev *tdev)
{
    struct cxgb3_client *client;

    mutex_lock(&cxgb3_db_lock);
    list_for_each_entry(client, &client_list, client_list) {
        if (client->remove)
            client->remove(tdev);
    }
    mutex_unlock(&cxgb3_db_lock);
}

void cxgb3_event_notify(struct t3cdev *tdev, u32 event, u32 port)
{
    struct cxgb3_client *client;

    mutex_lock(&cxgb3_db_lock);
    list_for_each_entry(client, &client_list, client_list) {
        if (client->event_handler)
            client->event_handler(tdev, event, port);
    }
    mutex_unlock(&cxgb3_db_lock);
}

static struct net_device *get_iff_from_mac(struct adapter *adapter,
                       const unsigned char *mac,
                       unsigned int vlan)
{
    int i;

    for_each_port(adapter, i) {
        struct net_device *dev = adapter->port[i];

        if (!memcmp(dev->dev_addr, mac, ETH_ALEN)) {
            if (vlan && vlan != VLAN_VID_MASK) {
                rcu_read_lock();
                dev = __vlan_find_dev_deep(dev, vlan);
                rcu_read_unlock();
            } else if (netif_is_bond_slave(dev)) {
                while (dev->master)
                    dev = dev->master;
            }
            return dev;
        }
    }
    return NULL;
}

static int cxgb_ulp_iscsi_ctl(struct adapter *adapter, unsigned int req,
                  void *data)
{
    int i;
    int ret = 0;
    unsigned int val = 0;
    struct ulp_iscsi_info *uiip = data;

    switch (req) {
    case ULP_ISCSI_GET_PARAMS:
        uiip->pdev = adapter->pdev;
        uiip->llimit = t3_read_reg(adapter, A_ULPRX_ISCSI_LLIMIT);
        uiip->ulimit = t3_read_reg(adapter, A_ULPRX_ISCSI_ULIMIT);
        uiip->tagmask = t3_read_reg(adapter, A_ULPRX_ISCSI_TAGMASK);

        val = t3_read_reg(adapter, A_ULPRX_ISCSI_PSZ);
        for (i = 0; i < 4; i++, val >>= 8)
            uiip->pgsz_factor[i] = val & 0xFF;

        val = t3_read_reg(adapter, A_TP_PARA_REG7);
        uiip->max_txsz =
        uiip->max_rxsz = min((val >> S_PMMAXXFERLEN0)&M_PMMAXXFERLEN0,
                     (val >> S_PMMAXXFERLEN1)&M_PMMAXXFERLEN1);
        /*
         * On tx, the iscsi pdu has to be <= tx page size and has to
         * fit into the Tx PM FIFO.
         */
        val = min(adapter->params.tp.tx_pg_size,
              t3_read_reg(adapter, A_PM1_TX_CFG) >> 17);
        uiip->max_txsz = min(val, uiip->max_txsz);

        /* set MaxRxData to 16224 */
        val = t3_read_reg(adapter, A_TP_PARA_REG2);
        if ((val >> S_MAXRXDATA) != 0x3f60) {
            val &= (M_RXCOALESCESIZE << S_RXCOALESCESIZE);
            val |= V_MAXRXDATA(0x3f60);
            printk(KERN_INFO
                "%s, iscsi set MaxRxData to 16224 (0x%x).\n",
                adapter->name, val);
            t3_write_reg(adapter, A_TP_PARA_REG2, val);
        }

        /*
         * on rx, the iscsi pdu has to be < rx page size and the
         * the max rx data length programmed in TP
         */
        val = min(adapter->params.tp.rx_pg_size,
              ((t3_read_reg(adapter, A_TP_PARA_REG2)) >>
                S_MAXRXDATA) & M_MAXRXDATA);
        uiip->max_rxsz = min(val, uiip->max_rxsz);
        break;
    case ULP_ISCSI_SET_PARAMS:
        t3_write_reg(adapter, A_ULPRX_ISCSI_TAGMASK, uiip->tagmask);
        /* program the ddp page sizes */
        for (i = 0; i < 4; i++)
            val |= (uiip->pgsz_factor[i] & 0xF) << (8 * i);
        if (val && (val != t3_read_reg(adapter, A_ULPRX_ISCSI_PSZ))) {
            printk(KERN_INFO
                "%s, setting iscsi pgsz 0x%x, %u,%u,%u,%u.\n",
                adapter->name, val, uiip->pgsz_factor[0],
                uiip->pgsz_factor[1], uiip->pgsz_factor[2],
                uiip->pgsz_factor[3]);
            t3_write_reg(adapter, A_ULPRX_ISCSI_PSZ, val);
        }
        break;
    default:
        ret = -EOPNOTSUPP;
    }
    return ret;
}

/* Response queue used for RDMA events. */
#define ASYNC_NOTIF_RSPQ 0

static int cxgb_rdma_ctl(struct adapter *adapter, unsigned int req, void *data)
{
    int ret = 0;

    switch (req) {
    case RDMA_GET_PARAMS: {
        struct rdma_info *rdma = data;
        struct pci_dev *pdev = adapter->pdev;

        rdma->udbell_physbase = pci_resource_start(pdev, 2);
        rdma->udbell_len = pci_resource_len(pdev, 2);
        rdma->tpt_base =
            t3_read_reg(adapter, A_ULPTX_TPT_LLIMIT);
        rdma->tpt_top = t3_read_reg(adapter, A_ULPTX_TPT_ULIMIT);
        rdma->pbl_base =
            t3_read_reg(adapter, A_ULPTX_PBL_LLIMIT);
        rdma->pbl_top = t3_read_reg(adapter, A_ULPTX_PBL_ULIMIT);
        rdma->rqt_base = t3_read_reg(adapter, A_ULPRX_RQ_LLIMIT);
        rdma->rqt_top = t3_read_reg(adapter, A_ULPRX_RQ_ULIMIT);
        rdma->kdb_addr = adapter->regs + A_SG_KDOORBELL;
        rdma->pdev = pdev;
        break;
    }
    case RDMA_CQ_OP:{
        unsigned long flags;
        struct rdma_cq_op *rdma = data;

        /* may be called in any context */
        spin_lock_irqsave(&adapter->sge.reg_lock, flags);
        ret = t3_sge_cqcntxt_op(adapter, rdma->id, rdma->op,
                    rdma->credits);
        spin_unlock_irqrestore(&adapter->sge.reg_lock, flags);
        break;
    }
    case RDMA_GET_MEM:{
        struct ch_mem_range *t = data;
        struct mc7 *mem;

        if ((t->addr & 7) || (t->len & 7))
            return -EINVAL;
        if (t->mem_id == MEM_CM)
            mem = &adapter->cm;
        else if (t->mem_id == MEM_PMRX)
            mem = &adapter->pmrx;
        else if (t->mem_id == MEM_PMTX)
            mem = &adapter->pmtx;
        else
            return -EINVAL;

        ret =
            t3_mc7_bd_read(mem, t->addr / 8, t->len / 8,
                    (u64 *) t->buf);
        if (ret)
            return ret;
        break;
    }
    case RDMA_CQ_SETUP:{
        struct rdma_cq_setup *rdma = data;

        spin_lock_irq(&adapter->sge.reg_lock);
        ret =
            t3_sge_init_cqcntxt(adapter, rdma->id,
                    rdma->base_addr, rdma->size,
                    ASYNC_NOTIF_RSPQ,
                    rdma->ovfl_mode, rdma->credits,
                    rdma->credit_thres);
        spin_unlock_irq(&adapter->sge.reg_lock);
        break;
    }
    case RDMA_CQ_DISABLE:
        spin_lock_irq(&adapter->sge.reg_lock);
        ret = t3_sge_disable_cqcntxt(adapter, *(unsigned int *)data);
        spin_unlock_irq(&adapter->sge.reg_lock);
        break;
    case RDMA_CTRL_QP_SETUP:{
        struct rdma_ctrlqp_setup *rdma = data;

        spin_lock_irq(&adapter->sge.reg_lock);
        ret = t3_sge_init_ecntxt(adapter, FW_RI_SGEEC_START, 0,
                        SGE_CNTXT_RDMA,
                        ASYNC_NOTIF_RSPQ,
                        rdma->base_addr, rdma->size,
                        FW_RI_TID_START, 1, 0);
        spin_unlock_irq(&adapter->sge.reg_lock);
        break;
    }
    case RDMA_GET_MIB: {
        spin_lock(&adapter->stats_lock);
        t3_tp_get_mib_stats(adapter, (struct tp_mib_stats *)data);
        spin_unlock(&adapter->stats_lock);
        break;
    }
    default:
        ret = -EOPNOTSUPP;
    }
    return ret;
}

static int cxgb_offload_ctl(struct t3cdev *tdev, unsigned int req, void *data)
{
    struct adapter *adapter = tdev2adap(tdev);
    struct tid_range *tid;
    struct mtutab *mtup;
    struct iff_mac *iffmacp;
    struct ddp_params *ddpp;
    struct adap_ports *ports;
    struct ofld_page_info *rx_page_info;
    struct tp_params *tp = &adapter->params.tp;
    int i;

    switch (req) {
    case GET_MAX_OUTSTANDING_WR:
        *(unsigned int *)data = FW_WR_NUM;
        break;
    case GET_WR_LEN:
        *(unsigned int *)data = WR_FLITS;
        break;
    case GET_TX_MAX_CHUNK:
        *(unsigned int *)data = 1 << 20;    /* 1MB */
        break;
    case GET_TID_RANGE:
        tid = data;
        tid->num = t3_mc5_size(&adapter->mc5) -
            adapter->params.mc5.nroutes -
            adapter->params.mc5.nfilters - adapter->params.mc5.nservers;
        tid->base = 0;
        break;
    case GET_STID_RANGE:
        tid = data;
        tid->num = adapter->params.mc5.nservers;
        tid->base = t3_mc5_size(&adapter->mc5) - tid->num -
            adapter->params.mc5.nfilters - adapter->params.mc5.nroutes;
        break;
    case GET_L2T_CAPACITY:
        *(unsigned int *)data = 2048;
        break;
    case GET_MTUS:
        mtup = data;
        mtup->size = NMTUS;
        mtup->mtus = adapter->params.mtus;
        break;
    case GET_IFF_FROM_MAC:
        iffmacp = data;
        iffmacp->dev = get_iff_from_mac(adapter, iffmacp->mac_addr,
                        iffmacp->vlan_tag &
                        VLAN_VID_MASK);
        break;
    case GET_DDP_PARAMS:
        ddpp = data;
        ddpp->llimit = t3_read_reg(adapter, A_ULPRX_TDDP_LLIMIT);
        ddpp->ulimit = t3_read_reg(adapter, A_ULPRX_TDDP_ULIMIT);
        ddpp->tag_mask = t3_read_reg(adapter, A_ULPRX_TDDP_TAGMASK);
        break;
    case GET_PORTS:
        ports = data;
        ports->nports = adapter->params.nports;
        for_each_port(adapter, i)
            ports->lldevs[i] = adapter->port[i];
        break;
    case ULP_ISCSI_GET_PARAMS:
    case ULP_ISCSI_SET_PARAMS:
        if (!offload_running(adapter))
            return -EAGAIN;
        return cxgb_ulp_iscsi_ctl(adapter, req, data);
    case RDMA_GET_PARAMS:
    case RDMA_CQ_OP:
    case RDMA_CQ_SETUP:
    case RDMA_CQ_DISABLE:
    case RDMA_CTRL_QP_SETUP:
    case RDMA_GET_MEM:
    case RDMA_GET_MIB:
        if (!offload_running(adapter))
            return -EAGAIN;
        return cxgb_rdma_ctl(adapter, req, data);
    case GET_RX_PAGE_INFO:
        rx_page_info = data;
        rx_page_info->page_size = tp->rx_pg_size;
        rx_page_info->num = tp->rx_num_pgs;
        break;
    case GET_ISCSI_IPV4ADDR: {
        struct iscsi_ipv4addr *p = data;
        struct port_info *pi = netdev_priv(p->dev);
        p->ipv4addr = pi->iscsi_ipv4addr;
        break;
    }
    case GET_EMBEDDED_INFO: {
        struct ch_embedded_info *e = data;

        spin_lock(&adapter->stats_lock);
        t3_get_fw_version(adapter, &e->fw_vers);
        t3_get_tp_version(adapter, &e->tp_vers);
        spin_unlock(&adapter->stats_lock);
        break;
    }
    default:
        return -EOPNOTSUPP;
    }
    return 0;
}

/*
 * Dummy handler for Rx offload packets in case we get an offload packet before
 * proper processing is setup.  This complains and drops the packet as it isn't
 * normal to get offload packets at this stage.
 */
static int rx_offload_blackhole(struct t3cdev *dev, struct sk_buff **skbs,
                int n)
{
    while (n--)
        dev_kfree_skb_any(skbs[n]);
    return 0;
}

static void dummy_neigh_update(struct t3cdev *dev, struct neighbour *neigh)
{
}

void cxgb3_set_dummy_ops(struct t3cdev *dev)
{
    dev->recv = rx_offload_blackhole;
    dev->neigh_update = dummy_neigh_update;
}

/*
 * Free an active-open TID.
 */
void *cxgb3_free_atid(struct t3cdev *tdev, int atid)
{
    struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
    union active_open_entry *p = atid2entry(t, atid);
    void *ctx = p->t3c_tid.ctx;

    spin_lock_bh(&t->atid_lock);
    p->next = t->afree;
    t->afree = p;
    t->atids_in_use--;
    spin_unlock_bh(&t->atid_lock);

    return ctx;
}

EXPORT_SYMBOL(cxgb3_free_atid);

/*
 * Free a server TID and return it to the free pool.
 */
void cxgb3_free_stid(struct t3cdev *tdev, int stid)
{
    struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
    union listen_entry *p = stid2entry(t, stid);

    spin_lock_bh(&t->stid_lock);
    p->next = t->sfree;
    t->sfree = p;
    t->stids_in_use--;
    spin_unlock_bh(&t->stid_lock);
}

EXPORT_SYMBOL(cxgb3_free_stid);

void cxgb3_insert_tid(struct t3cdev *tdev, struct cxgb3_client *client,
              void *ctx, unsigned int tid)
{
    struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;

    t->tid_tab[tid].client = client;
    t->tid_tab[tid].ctx = ctx;
    atomic_inc(&t->tids_in_use);
}

EXPORT_SYMBOL(cxgb3_insert_tid);

/*
 * Populate a TID_RELEASE WR.  The skb must be already propely sized.
 */
static inline void mk_tid_release(struct sk_buff *skb, unsigned int tid)
{
    struct cpl_tid_release *req;

    skb->priority = CPL_PRIORITY_SETUP;
    req = (struct cpl_tid_release *)__skb_put(skb, sizeof(*req));
    req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
    OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_TID_RELEASE, tid));
}

static void t3_process_tid_release_list(struct work_struct *work)
{
    struct t3c_data *td = container_of(work, struct t3c_data,
                       tid_release_task);
    struct sk_buff *skb;
    struct t3cdev *tdev = td->dev;


    spin_lock_bh(&td->tid_release_lock);
    while (td->tid_release_list) {
        struct t3c_tid_entry *p = td->tid_release_list;

        td->tid_release_list = p->ctx;
        spin_unlock_bh(&td->tid_release_lock);

        skb = alloc_skb(sizeof(struct cpl_tid_release),
                GFP_KERNEL);
        if (!skb)
            skb = td->nofail_skb;
        if (!skb) {
            spin_lock_bh(&td->tid_release_lock);
            p->ctx = (void *)td->tid_release_list;
            td->tid_release_list = p;
            break;
        }
        mk_tid_release(skb, p - td->tid_maps.tid_tab);
        cxgb3_ofld_send(tdev, skb);
        p->ctx = NULL;
        if (skb == td->nofail_skb)
            td->nofail_skb =
                alloc_skb(sizeof(struct cpl_tid_release),
                    GFP_KERNEL);
        spin_lock_bh(&td->tid_release_lock);
    }
    td->release_list_incomplete = (td->tid_release_list == NULL) ? 0 : 1;
    spin_unlock_bh(&td->tid_release_lock);

    if (!td->nofail_skb)
        td->nofail_skb =
            alloc_skb(sizeof(struct cpl_tid_release),
                GFP_KERNEL);
}

/* use ctx as a next pointer in the tid release list */
void cxgb3_queue_tid_release(struct t3cdev *tdev, unsigned int tid)
{
    struct t3c_data *td = T3C_DATA(tdev);
    struct t3c_tid_entry *p = &td->tid_maps.tid_tab[tid];

    spin_lock_bh(&td->tid_release_lock);
    p->ctx = (void *)td->tid_release_list;
    p->client = NULL;
    td->tid_release_list = p;
    if (!p->ctx || td->release_list_incomplete)
        schedule_work(&td->tid_release_task);
    spin_unlock_bh(&td->tid_release_lock);
}

EXPORT_SYMBOL(cxgb3_queue_tid_release);

/*
 * Remove a tid from the TID table.  A client may defer processing its last
 * CPL message if it is locked at the time it arrives, and while the message
 * sits in the client's backlog the TID may be reused for another connection.
 * To handle this we atomically switch the TID association if it still points
 * to the original client context.
 */
void cxgb3_remove_tid(struct t3cdev *tdev, void *ctx, unsigned int tid)
{
    struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;

    BUG_ON(tid >= t->ntids);
    if (tdev->type == T3A)
        (void)cmpxchg(&t->tid_tab[tid].ctx, ctx, NULL);
    else {
        struct sk_buff *skb;

        skb = alloc_skb(sizeof(struct cpl_tid_release), GFP_ATOMIC);
        if (likely(skb)) {
            mk_tid_release(skb, tid);
            cxgb3_ofld_send(tdev, skb);
            t->tid_tab[tid].ctx = NULL;
        } else
            cxgb3_queue_tid_release(tdev, tid);
    }
    atomic_dec(&t->tids_in_use);
}

EXPORT_SYMBOL(cxgb3_remove_tid);

int cxgb3_alloc_atid(struct t3cdev *tdev, struct cxgb3_client *client,
             void *ctx)
{
    int atid = -1;
    struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;

    spin_lock_bh(&t->atid_lock);
    if (t->afree &&
        t->atids_in_use + atomic_read(&t->tids_in_use) + MC5_MIN_TIDS <=
        t->ntids) {
        union active_open_entry *p = t->afree;

        atid = (p - t->atid_tab) + t->atid_base;
        t->afree = p->next;
        p->t3c_tid.ctx = ctx;
        p->t3c_tid.client = client;
        t->atids_in_use++;
    }
    spin_unlock_bh(&t->atid_lock);
    return atid;
}

EXPORT_SYMBOL(cxgb3_alloc_atid);

int cxgb3_alloc_stid(struct t3cdev *tdev, struct cxgb3_client *client,
             void *ctx)
{
    int stid = -1;
    struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;

    spin_lock_bh(&t->stid_lock);
    if (t->sfree) {
        union listen_entry *p = t->sfree;

        stid = (p - t->stid_tab) + t->stid_base;
        t->sfree = p->next;
        p->t3c_tid.ctx = ctx;
        p->t3c_tid.client = client;
        t->stids_in_use++;
    }
    spin_unlock_bh(&t->stid_lock);
    return stid;
}

EXPORT_SYMBOL(cxgb3_alloc_stid);

/* Get the t3cdev associated with a net_device */
struct t3cdev *dev2t3cdev(struct net_device *dev)
{
    const struct port_info *pi = netdev_priv(dev);

    return (struct t3cdev *)pi->adapter;
}

EXPORT_SYMBOL(dev2t3cdev);

static int do_smt_write_rpl(struct t3cdev *dev, struct sk_buff *skb)
{
    struct cpl_smt_write_rpl *rpl = cplhdr(skb);

    if (rpl->status != CPL_ERR_NONE)
        printk(KERN_ERR
               "Unexpected SMT_WRITE_RPL status %u for entry %u\n",
               rpl->status, GET_TID(rpl));

    return CPL_RET_BUF_DONE;
}

static int do_l2t_write_rpl(struct t3cdev *dev, struct sk_buff *skb)
{
    struct cpl_l2t_write_rpl *rpl = cplhdr(skb);

    if (rpl->status != CPL_ERR_NONE)
        printk(KERN_ERR
               "Unexpected L2T_WRITE_RPL status %u for entry %u\n",
               rpl->status, GET_TID(rpl));

    return CPL_RET_BUF_DONE;
}

static int do_rte_write_rpl(struct t3cdev *dev, struct sk_buff *skb)
{
    struct cpl_rte_write_rpl *rpl = cplhdr(skb);

    if (rpl->status != CPL_ERR_NONE)
        printk(KERN_ERR
               "Unexpected RTE_WRITE_RPL status %u for entry %u\n",
               rpl->status, GET_TID(rpl));

    return CPL_RET_BUF_DONE;
}

static int do_act_open_rpl(struct t3cdev *dev, struct sk_buff *skb)
{
    struct cpl_act_open_rpl *rpl = cplhdr(skb);
    unsigned int atid = G_TID(ntohl(rpl->atid));
    struct t3c_tid_entry *t3c_tid;

    t3c_tid = lookup_atid(&(T3C_DATA(dev))->tid_maps, atid);
    if (t3c_tid && t3c_tid->ctx && t3c_tid->client &&
        t3c_tid->client->handlers &&
        t3c_tid->client->handlers[CPL_ACT_OPEN_RPL]) {
        return t3c_tid->client->handlers[CPL_ACT_OPEN_RPL] (dev, skb,
                                    t3c_tid->
                                    ctx);
    } else {
        printk(KERN_ERR "%s: received clientless CPL command 0x%x\n",
               dev->name, CPL_ACT_OPEN_RPL);
        return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
    }
}

static int do_stid_rpl(struct t3cdev *dev, struct sk_buff *skb)
{
    union opcode_tid *p = cplhdr(skb);
    unsigned int stid = G_TID(ntohl(p->opcode_tid));
    struct t3c_tid_entry *t3c_tid;

    t3c_tid = lookup_stid(&(T3C_DATA(dev))->tid_maps, stid);
    if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
        t3c_tid->client->handlers[p->opcode]) {
        return t3c_tid->client->handlers[p->opcode] (dev, skb,
                                 t3c_tid->ctx);
    } else {
        printk(KERN_ERR "%s: received clientless CPL command 0x%x\n",
               dev->name, p->opcode);
        return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
    }
}

static int do_hwtid_rpl(struct t3cdev *dev, struct sk_buff *skb)
{
    union opcode_tid *p = cplhdr(skb);
    unsigned int hwtid = G_TID(ntohl(p->opcode_tid));
    struct t3c_tid_entry *t3c_tid;

    t3c_tid = lookup_tid(&(T3C_DATA(dev))->tid_maps, hwtid);
    if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
        t3c_tid->client->handlers[p->opcode]) {
        return t3c_tid->client->handlers[p->opcode]
            (dev, skb, t3c_tid->ctx);
    } else {
        printk(KERN_ERR "%s: received clientless CPL command 0x%x\n",
               dev->name, p->opcode);
        return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
    }
}

static int do_cr(struct t3cdev *dev, struct sk_buff *skb)
{
    struct cpl_pass_accept_req *req = cplhdr(skb);
    unsigned int stid = G_PASS_OPEN_TID(ntohl(req->tos_tid));
    struct tid_info *t = &(T3C_DATA(dev))->tid_maps;
    struct t3c_tid_entry *t3c_tid;
    unsigned int tid = GET_TID(req);

    if (unlikely(tid >= t->ntids)) {
        printk("%s: passive open TID %u too large\n",
               dev->name, tid);
        t3_fatal_err(tdev2adap(dev));
        return CPL_RET_BUF_DONE;
    }

    t3c_tid = lookup_stid(t, stid);
    if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
        t3c_tid->client->handlers[CPL_PASS_ACCEPT_REQ]) {
        return t3c_tid->client->handlers[CPL_PASS_ACCEPT_REQ]
            (dev, skb, t3c_tid->ctx);
    } else {
        printk(KERN_ERR "%s: received clientless CPL command 0x%x\n",
               dev->name, CPL_PASS_ACCEPT_REQ);
        return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
    }
}

/*
 * Returns an sk_buff for a reply CPL message of size len.  If the input
 * sk_buff has no other users it is trimmed and reused, otherwise a new buffer
 * is allocated.  The input skb must be of size at least len.  Note that this
 * operation does not destroy the original skb data even if it decides to reuse
 * the buffer.
 */
static struct sk_buff *cxgb3_get_cpl_reply_skb(struct sk_buff *skb, size_t len,
                           gfp_t gfp)
{
    if (likely(!skb_cloned(skb))) {
        BUG_ON(skb->len < len);
        __skb_trim(skb, len);
        skb_get(skb);
    } else {
        skb = alloc_skb(len, gfp);
        if (skb)
            __skb_put(skb, len);
    }
    return skb;
}

static int do_abort_req_rss(struct t3cdev *dev, struct sk_buff *skb)
{
    union opcode_tid *p = cplhdr(skb);
    unsigned int hwtid = G_TID(ntohl(p->opcode_tid));
    struct t3c_tid_entry *t3c_tid;

    t3c_tid = lookup_tid(&(T3C_DATA(dev))->tid_maps, hwtid);
    if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
        t3c_tid->client->handlers[p->opcode]) {
        return t3c_tid->client->handlers[p->opcode]
            (dev, skb, t3c_tid->ctx);
    } else {
        struct cpl_abort_req_rss *req = cplhdr(skb);
        struct cpl_abort_rpl *rpl;
        struct sk_buff *reply_skb;
        unsigned int tid = GET_TID(req);
        u8 cmd = req->status;

        if (req->status == CPL_ERR_RTX_NEG_ADVICE ||
            req->status == CPL_ERR_PERSIST_NEG_ADVICE)
            goto out;

        reply_skb = cxgb3_get_cpl_reply_skb(skb,
                            sizeof(struct
                               cpl_abort_rpl),
                            GFP_ATOMIC);

        if (!reply_skb) {
            printk("do_abort_req_rss: couldn't get skb!\n");
            goto out;
        }
        reply_skb->priority = CPL_PRIORITY_DATA;
        __skb_put(reply_skb, sizeof(struct cpl_abort_rpl));
        rpl = cplhdr(reply_skb);
        rpl->wr.wr_hi =
            htonl(V_WR_OP(FW_WROPCODE_OFLD_HOST_ABORT_CON_RPL));
        rpl->wr.wr_lo = htonl(V_WR_TID(tid));
        OPCODE_TID(rpl) = htonl(MK_OPCODE_TID(CPL_ABORT_RPL, tid));
        rpl->cmd = cmd;
        cxgb3_ofld_send(dev, reply_skb);
out:
        return CPL_RET_BUF_DONE;
    }
}

static int do_act_establish(struct t3cdev *dev, struct sk_buff *skb)
{
    struct cpl_act_establish *req = cplhdr(skb);
    unsigned int atid = G_PASS_OPEN_TID(ntohl(req->tos_tid));
    struct tid_info *t = &(T3C_DATA(dev))->tid_maps;
    struct t3c_tid_entry *t3c_tid;
    unsigned int tid = GET_TID(req);

    if (unlikely(tid >= t->ntids)) {
        printk("%s: active establish TID %u too large\n",
               dev->name, tid);
        t3_fatal_err(tdev2adap(dev));
        return CPL_RET_BUF_DONE;
    }

    t3c_tid = lookup_atid(t, atid);
    if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
        t3c_tid->client->handlers[CPL_ACT_ESTABLISH]) {
        return t3c_tid->client->handlers[CPL_ACT_ESTABLISH]
            (dev, skb, t3c_tid->ctx);
    } else {
        printk(KERN_ERR "%s: received clientless CPL command 0x%x\n",
               dev->name, CPL_ACT_ESTABLISH);
        return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
    }
}

static int do_trace(struct t3cdev *dev, struct sk_buff *skb)
{
    struct cpl_trace_pkt *p = cplhdr(skb);

    skb->protocol = htons(0xffff);
    skb->dev = dev->lldev;
    skb_pull(skb, sizeof(*p));
    skb_reset_mac_header(skb);
    netif_receive_skb(skb);
    return 0;
}

/*
 * That skb would better have come from process_responses() where we abuse
 * ->priority and ->csum to carry our data.  NB: if we get to per-arch
 * ->csum, the things might get really interesting here.
 */

static inline u32 get_hwtid(struct sk_buff *skb)
{
    return ntohl((__force __be32)skb->priority) >> 8 & 0xfffff;
}

static inline u32 get_opcode(struct sk_buff *skb)
{
    return G_OPCODE(ntohl((__force __be32)skb->csum));
}

static int do_term(struct t3cdev *dev, struct sk_buff *skb)
{
    unsigned int hwtid = get_hwtid(skb);
    unsigned int opcode = get_opcode(skb);
    struct t3c_tid_entry *t3c_tid;

    t3c_tid = lookup_tid(&(T3C_DATA(dev))->tid_maps, hwtid);
    if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
        t3c_tid->client->handlers[opcode]) {
        return t3c_tid->client->handlers[opcode] (dev, skb,
                              t3c_tid->ctx);
    } else {
        printk(KERN_ERR "%s: received clientless CPL command 0x%x\n",
               dev->name, opcode);
        return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
    }
}

static int nb_callback(struct notifier_block *self, unsigned long event,
               void *ctx)
{
    switch (event) {
    case (NETEVENT_NEIGH_UPDATE):{
        cxgb_neigh_update((struct neighbour *)ctx);
        break;
    }
    case (NETEVENT_REDIRECT):{
        struct netevent_redirect *nr = ctx;
        cxgb_redirect(nr->old, nr->old_neigh,
                  nr->new, nr->new_neigh,
                  nr->daddr);
        cxgb_neigh_update(nr->new_neigh);
        break;
    }
    default:
        break;
    }
    return 0;
}

static struct notifier_block nb = {
    .notifier_call = nb_callback
};

/*
 * Process a received packet with an unknown/unexpected CPL opcode.
 */
static int do_bad_cpl(struct t3cdev *dev, struct sk_buff *skb)
{
    printk(KERN_ERR "%s: received bad CPL command 0x%x\n", dev->name,
           *skb->data);
    return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
}

/*
 * Handlers for each CPL opcode
 */
static cpl_handler_func cpl_handlers[NUM_CPL_CMDS];

/*
 * Add a new handler to the CPL dispatch table.  A NULL handler may be supplied
 * to unregister an existing handler.
 */
void t3_register_cpl_handler(unsigned int opcode, cpl_handler_func h)
{
    if (opcode < NUM_CPL_CMDS)
        cpl_handlers[opcode] = h ? h : do_bad_cpl;
    else
        printk(KERN_ERR "T3C: handler registration for "
               "opcode %x failed\n", opcode);
}

EXPORT_SYMBOL(t3_register_cpl_handler);

/*
 * T3CDEV's receive method.
 */
static int process_rx(struct t3cdev *dev, struct sk_buff **skbs, int n)
{
    while (n--) {
        struct sk_buff *skb = *skbs++;
        unsigned int opcode = get_opcode(skb);
        int ret = cpl_handlers[opcode] (dev, skb);

#if VALIDATE_TID
        if (ret & CPL_RET_UNKNOWN_TID) {
            union opcode_tid *p = cplhdr(skb);

            printk(KERN_ERR "%s: CPL message (opcode %u) had "
                   "unknown TID %u\n", dev->name, opcode,
                   G_TID(ntohl(p->opcode_tid)));
        }
#endif
        if (ret & CPL_RET_BUF_DONE)
            kfree_skb(skb);
    }
    return 0;
}

/*
 * Sends an sk_buff to a T3C driver after dealing with any active network taps.
 */
int cxgb3_ofld_send(struct t3cdev *dev, struct sk_buff *skb)
{
    int r;

    local_bh_disable();
    r = dev->send(dev, skb);
    local_bh_enable();
    return r;
}

EXPORT_SYMBOL(cxgb3_ofld_send);

static int is_offloading(struct net_device *dev)
{
    struct adapter *adapter;
    int i;

    read_lock_bh(&adapter_list_lock);
    list_for_each_entry(adapter, &adapter_list, adapter_list) {
        for_each_port(adapter, i) {
            if (dev == adapter->port[i]) {
                read_unlock_bh(&adapter_list_lock);
                return 1;
            }
        }
    }
    read_unlock_bh(&adapter_list_lock);
    return 0;
}

static void cxgb_neigh_update(struct neighbour *neigh)
{
    struct net_device *dev;

    if (!neigh)
        return;
    dev = neigh->dev;
    if (dev && (is_offloading(dev))) {
        struct t3cdev *tdev = dev2t3cdev(dev);

        BUG_ON(!tdev);
        t3_l2t_update(tdev, neigh);
    }
}

static void set_l2t_ix(struct t3cdev *tdev, u32 tid, struct l2t_entry *e)
{
    struct sk_buff *skb;
    struct cpl_set_tcb_field *req;

    skb = alloc_skb(sizeof(*req), GFP_ATOMIC);
    if (!skb) {
        printk(KERN_ERR "%s: cannot allocate skb!\n", __func__);
        return;
    }
    skb->priority = CPL_PRIORITY_CONTROL;
    req = (struct cpl_set_tcb_field *)skb_put(skb, sizeof(*req));
    req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
    OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, tid));
    req->reply = 0;
    req->cpu_idx = 0;
    req->word = htons(W_TCB_L2T_IX);
    req->mask = cpu_to_be64(V_TCB_L2T_IX(M_TCB_L2T_IX));
    req->val = cpu_to_be64(V_TCB_L2T_IX(e->idx));
    tdev->send(tdev, skb);
}

static void cxgb_redirect(struct dst_entry *old, struct neighbour *old_neigh,
              struct dst_entry *new, struct neighbour *new_neigh,
              const void *daddr)
{
    struct net_device *olddev, *newdev;
    struct tid_info *ti;
    struct t3cdev *tdev;
    u32 tid;
    int update_tcb;
    struct l2t_entry *e;
    struct t3c_tid_entry *te;

    olddev = old_neigh->dev;
    newdev = new_neigh->dev;

    if (!is_offloading(olddev))
        return;
    if (!is_offloading(newdev)) {
        printk(KERN_WARNING "%s: Redirect to non-offload "
               "device ignored.\n", __func__);
        return;
    }
    tdev = dev2t3cdev(olddev);
    BUG_ON(!tdev);
    if (tdev != dev2t3cdev(newdev)) {
        printk(KERN_WARNING "%s: Redirect to different "
               "offload device ignored.\n", __func__);
        return;
    }

    /* Add new L2T entry */
    e = t3_l2t_get(tdev, new, newdev, daddr);
    if (!e) {
        printk(KERN_ERR "%s: couldn't allocate new l2t entry!\n",
               __func__);
        return;
    }

    /* Walk tid table and notify clients of dst change. */
    ti = &(T3C_DATA(tdev))->tid_maps;
    for (tid = 0; tid < ti->ntids; tid++) {
        te = lookup_tid(ti, tid);
        BUG_ON(!te);
        if (te && te->ctx && te->client && te->client->redirect) {
            update_tcb = te->client->redirect(te->ctx, old, new, e);
            if (update_tcb) {
                rcu_read_lock();
                l2t_hold(L2DATA(tdev), e);
                rcu_read_unlock();
                set_l2t_ix(tdev, tid, e);
            }
        }
    }
    l2t_release(tdev, e);
}

/*
 * Allocate a chunk of memory using kmalloc or, if that fails, vmalloc.
 * The allocated memory is cleared.
 */
void *cxgb_alloc_mem(unsigned long size)
{
    void *p = kzalloc(size, GFP_KERNEL);

    if (!p)
        p = vzalloc(size);
    return p;
}

/*
 * Free memory allocated through t3_alloc_mem().
 */
void cxgb_free_mem(void *addr)
{
    if (is_vmalloc_addr(addr))
        vfree(addr);
    else
        kfree(addr);
}

/*
 * Allocate and initialize the TID tables.  Returns 0 on success.
 */
static int init_tid_tabs(struct tid_info *t, unsigned int ntids,
             unsigned int natids, unsigned int nstids,
             unsigned int atid_base, unsigned int stid_base)
{
    unsigned long size = ntids * sizeof(*t->tid_tab) +
        natids * sizeof(*t->atid_tab) + nstids * sizeof(*t->stid_tab);

    t->tid_tab = cxgb_alloc_mem(size);
    if (!t->tid_tab)
        return -ENOMEM;

    t->stid_tab = (union listen_entry *)&t->tid_tab[ntids];
    t->atid_tab = (union active_open_entry *)&t->stid_tab[nstids];
    t->ntids = ntids;
    t->nstids = nstids;
    t->stid_base = stid_base;
    t->sfree = NULL;
    t->natids = natids;
    t->atid_base = atid_base;
    t->afree = NULL;
    t->stids_in_use = t->atids_in_use = 0;
    atomic_set(&t->tids_in_use, 0);
    spin_lock_init(&t->stid_lock);
    spin_lock_init(&t->atid_lock);

    /*
     * Setup the free lists for stid_tab and atid_tab.
     */
    if (nstids) {
        while (--nstids)
            t->stid_tab[nstids - 1].next = &t->stid_tab[nstids];
        t->sfree = t->stid_tab;
    }
    if (natids) {
        while (--natids)
            t->atid_tab[natids - 1].next = &t->atid_tab[natids];
        t->afree = t->atid_tab;
    }
    return 0;
}

static void free_tid_maps(struct tid_info *t)
{
    cxgb_free_mem(t->tid_tab);
}

static inline void add_adapter(struct adapter *adap)
{
    write_lock_bh(&adapter_list_lock);
    list_add_tail(&adap->adapter_list, &adapter_list);
    write_unlock_bh(&adapter_list_lock);
}

static inline void remove_adapter(struct adapter *adap)
{
    write_lock_bh(&adapter_list_lock);
    list_del(&adap->adapter_list);
    write_unlock_bh(&adapter_list_lock);
}

int cxgb3_offload_activate(struct adapter *adapter)
{
    struct t3cdev *dev = &adapter->tdev;
    int natids, err;
    struct t3c_data *t;
    struct tid_range stid_range, tid_range;
    struct mtutab mtutab;
    unsigned int l2t_capacity;

    t = kzalloc(sizeof(*t), GFP_KERNEL);
    if (!t)
        return -ENOMEM;

    err = -EOPNOTSUPP;
    if (dev->ctl(dev, GET_TX_MAX_CHUNK, &t->tx_max_chunk) < 0 ||
        dev->ctl(dev, GET_MAX_OUTSTANDING_WR, &t->max_wrs) < 0 ||
        dev->ctl(dev, GET_L2T_CAPACITY, &l2t_capacity) < 0 ||
        dev->ctl(dev, GET_MTUS, &mtutab) < 0 ||
        dev->ctl(dev, GET_TID_RANGE, &tid_range) < 0 ||
        dev->ctl(dev, GET_STID_RANGE, &stid_range) < 0)
        goto out_free;

    err = -ENOMEM;
    RCU_INIT_POINTER(dev->l2opt, t3_init_l2t(l2t_capacity));
    if (!L2DATA(dev))
        goto out_free;

    natids = min(tid_range.num / 2, MAX_ATIDS);
    err = init_tid_tabs(&t->tid_maps, tid_range.num, natids,
                stid_range.num, ATID_BASE, stid_range.base);
    if (err)
        goto out_free_l2t;

    t->mtus = mtutab.mtus;
    t->nmtus = mtutab.size;

    INIT_WORK(&t->tid_release_task, t3_process_tid_release_list);
    spin_lock_init(&t->tid_release_lock);
    INIT_LIST_HEAD(&t->list_node);
    t->dev = dev;

    T3C_DATA(dev) = t;
    dev->recv = process_rx;
    dev->neigh_update = t3_l2t_update;

    /* Register netevent handler once */
    if (list_empty(&adapter_list))
        register_netevent_notifier(&nb);

    t->nofail_skb = alloc_skb(sizeof(struct cpl_tid_release), GFP_KERNEL);
    t->release_list_incomplete = 0;

    add_adapter(adapter);
    return 0;

out_free_l2t:
    t3_free_l2t(L2DATA(dev));
    RCU_INIT_POINTER(dev->l2opt, NULL);
out_free:
    kfree(t);
    return err;
}

static void clean_l2_data(struct rcu_head *head)
{
    struct l2t_data *d = container_of(head, struct l2t_data, rcu_head);
    t3_free_l2t(d);
}


void cxgb3_offload_deactivate(struct adapter *adapter)
{
    struct t3cdev *tdev = &adapter->tdev;
    struct t3c_data *t = T3C_DATA(tdev);
    struct l2t_data *d;

    remove_adapter(adapter);
    if (list_empty(&adapter_list))
        unregister_netevent_notifier(&nb);

    free_tid_maps(&t->tid_maps);
    T3C_DATA(tdev) = NULL;
    rcu_read_lock();
    d = L2DATA(tdev);
    rcu_read_unlock();
    RCU_INIT_POINTER(tdev->l2opt, NULL);
    call_rcu(&d->rcu_head, clean_l2_data);
    if (t->nofail_skb)
        kfree_skb(t->nofail_skb);
    kfree(t);
}

static inline void register_tdev(struct t3cdev *tdev)
{
    static int unit;

    mutex_lock(&cxgb3_db_lock);
    snprintf(tdev->name, sizeof(tdev->name), "ofld_dev%d", unit++);
    list_add_tail(&tdev->ofld_dev_list, &ofld_dev_list);
    mutex_unlock(&cxgb3_db_lock);
}

static inline void unregister_tdev(struct t3cdev *tdev)
{
    mutex_lock(&cxgb3_db_lock);
    list_del(&tdev->ofld_dev_list);
    mutex_unlock(&cxgb3_db_lock);
}

static inline int adap2type(struct adapter *adapter)
{
    int type = 0;

    switch (adapter->params.rev) {
    case T3_REV_A:
        type = T3A;
        break;
    case T3_REV_B:
    case T3_REV_B2:
        type = T3B;
        break;
    case T3_REV_C:
        type = T3C;
        break;
    }
    return type;
}

void __devinit cxgb3_adapter_ofld(struct adapter *adapter)
{
    struct t3cdev *tdev = &adapter->tdev;

    INIT_LIST_HEAD(&tdev->ofld_dev_list);

    cxgb3_set_dummy_ops(tdev);
    tdev->send = t3_offload_tx;
    tdev->ctl = cxgb_offload_ctl;
    tdev->type = adap2type(adapter);

    register_tdev(tdev);
}

void __devexit cxgb3_adapter_unofld(struct adapter *adapter)
{
    struct t3cdev *tdev = &adapter->tdev;

    tdev->recv = NULL;
    tdev->neigh_update = NULL;

    unregister_tdev(tdev);
}

void __init cxgb3_offload_init(void)
{
    int i;

    for (i = 0; i < NUM_CPL_CMDS; ++i)
        cpl_handlers[i] = do_bad_cpl;

    t3_register_cpl_handler(CPL_SMT_WRITE_RPL, do_smt_write_rpl);
    t3_register_cpl_handler(CPL_L2T_WRITE_RPL, do_l2t_write_rpl);
    t3_register_cpl_handler(CPL_RTE_WRITE_RPL, do_rte_write_rpl);
    t3_register_cpl_handler(CPL_PASS_OPEN_RPL, do_stid_rpl);
    t3_register_cpl_handler(CPL_CLOSE_LISTSRV_RPL, do_stid_rpl);
    t3_register_cpl_handler(CPL_PASS_ACCEPT_REQ, do_cr);
    t3_register_cpl_handler(CPL_PASS_ESTABLISH, do_hwtid_rpl);
    t3_register_cpl_handler(CPL_ABORT_RPL_RSS, do_hwtid_rpl);
    t3_register_cpl_handler(CPL_ABORT_RPL, do_hwtid_rpl);
    t3_register_cpl_handler(CPL_RX_URG_NOTIFY, do_hwtid_rpl);
    t3_register_cpl_handler(CPL_RX_DATA, do_hwtid_rpl);
    t3_register_cpl_handler(CPL_TX_DATA_ACK, do_hwtid_rpl);
    t3_register_cpl_handler(CPL_TX_DMA_ACK, do_hwtid_rpl);
    t3_register_cpl_handler(CPL_ACT_OPEN_RPL, do_act_open_rpl);
    t3_register_cpl_handler(CPL_PEER_CLOSE, do_hwtid_rpl);
    t3_register_cpl_handler(CPL_CLOSE_CON_RPL, do_hwtid_rpl);
    t3_register_cpl_handler(CPL_ABORT_REQ_RSS, do_abort_req_rss);
    t3_register_cpl_handler(CPL_ACT_ESTABLISH, do_act_establish);
    t3_register_cpl_handler(CPL_SET_TCB_RPL, do_hwtid_rpl);
    t3_register_cpl_handler(CPL_GET_TCB_RPL, do_hwtid_rpl);
    t3_register_cpl_handler(CPL_RDMA_TERMINATE, do_term);
    t3_register_cpl_handler(CPL_RDMA_EC_STATUS, do_hwtid_rpl);
    t3_register_cpl_handler(CPL_TRACE_PKT, do_trace);
    t3_register_cpl_handler(CPL_RX_DATA_DDP, do_hwtid_rpl);
    t3_register_cpl_handler(CPL_RX_DDP_COMPLETE, do_hwtid_rpl);
    t3_register_cpl_handler(CPL_ISCSI_HDR, do_hwtid_rpl);
}