Revert "Disable build of xen kernel."

[people/pmueller/ipfire-2.x.git] / src / patches / suse-2.6.27.25 / patches.drivers / cxgb3i

Subject: add cxgb3i iscsi driver
From: Karen Xie <kxie@chelsio.com>
References: FATE#304154,bnc#433500

Add Chelsio S3 iscsi initiator driver.
This patch implements the cxgb3i iscsi connection offload.

Signed-off-by: Karen Xie <kxie@chelsio.com>
Signed-off-by: Chandra Seetharaman <sekharan@us.ibm.com>
Signed-off-by: Hannes Reinecke <hare@suse.de>
---

---
 drivers/scsi/Kconfig                 |    2 
 drivers/scsi/Makefile                |    1 
 drivers/scsi/cxgb3i/Kconfig          |    7 
 drivers/scsi/cxgb3i/Makefile         |    5 
 drivers/scsi/cxgb3i/cxgb3i.h         |  179 +++
 drivers/scsi/cxgb3i/cxgb3i_init.c    |  109 +
 drivers/scsi/cxgb3i/cxgb3i_iscsi.c   |  854 ++++++++++++++
 drivers/scsi/cxgb3i/cxgb3i_offload.c | 2021 +++++++++++++++++++++++++++++++++++
 drivers/scsi/cxgb3i/cxgb3i_offload.h |  220 +++
 drivers/scsi/cxgb3i/cxgb3i_ulp2.c    |  741 ++++++++++++
 drivers/scsi/cxgb3i/cxgb3i_ulp2.h    |  108 +
 11 files changed, 4247 insertions(+)

--- /dev/null
+++ b/drivers/scsi/cxgb3i/cxgb3i.h
@@ -0,0 +1,179 @@
+/*
+ * cxgb3i.h: Chelsio S3xx iSCSI driver.
+ *
+ * Copyright (c) 2008 Chelsio Communications, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation.
+ *
+ * Written by: Karen Xie (kxie@chelsio.com)
+ */
+
+#ifndef __CXGB3I_H__
+#define __CXGB3I_H__
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/errno.h>
+#include <linux/types.h>
+#include <linux/list.h>
+#include <linux/netdevice.h>
+#include <linux/scatterlist.h>
+
+/* from cxgb3 LLD */
+#include "common.h"
+#include "t3_cpl.h"
+#include "t3cdev.h"
+#include "cxgb3_ctl_defs.h"
+#include "cxgb3_offload.h"
+#include "firmware_exports.h"
+#include "cxgb3i_offload.h"
+/* from iscsi */
+#include "../iscsi_tcp.h"
+
+#define CXGB3I_SCSI_QDEPTH_DFLT        128
+#define CXGB3I_MAX_TARGET      CXGB3I_MAX_CONN
+#define CXGB3I_MAX_LUN         512
+#define ISCSI_PDU_HEADER_MAX   (56 + 256) /* bhs + digests + ahs */
+
+struct cxgb3i_adapter;
+struct cxgb3i_hba;
+struct cxgb3i_endpoint;
+
+/**
+ * struct cxgb3i_tag_format - cxgb3i ulp tag for steering pdu payload
+ *
+ * @idx_bits:  # of bits used to store itt (from iscsi laryer)
+ * @age_bits:  # of bits used to store age (from iscsi laryer)
+ * @rsvd_bits: # of bits used by h/w
+ * @rsvd_shift:        shift left
+ * @rsvd_mask:  bit mask
+ * @rsvd_tag_mask:  h/w tag bit mask
+ *
+ */
+struct cxgb3i_tag_format {
+       unsigned char idx_bits;
+       unsigned char age_bits;
+       unsigned char rsvd_bits;
+       unsigned char rsvd_shift;
+       u32 rsvd_mask;
+       u32 rsvd_tag_mask;
+};
+
+/**
+ * struct cxgb3i_ddp_info - cxgb3i direct data placement for pdu payload
+ *
+ * @llimit:    lower bound of the page pod memory
+ * @ulimit:    upper bound of the page pod memory
+ * @nppods:    # of page pod entries
+ * @idx_last:  page pod entry last used
+ * @map_lock:  lock to synchonize access to the page pod map
+ * @map:       page pod map
+ */
+struct cxgb3i_ddp_info {
+       unsigned int llimit;
+       unsigned int ulimit;
+       unsigned int nppods;
+       unsigned int idx_last;
+       spinlock_t map_lock;
+       u8 *map;
+};
+
+/**
+ * struct cxgb3i_hba - cxgb3i iscsi structure (per port)
+ *
+ * @snic:      cxgb3i adapter containing this port
+ * @ndev:      pointer to netdev structure
+ * @shost:     pointer to scsi host structure
+ */
+struct cxgb3i_hba {
+       struct cxgb3i_adapter *snic;
+       struct net_device *ndev;
+       struct Scsi_Host *shost;
+};
+
+/**
+ * struct cxgb3i_adapter - cxgb3i adapter structure (per pci)
+ *
+ * @listhead:  list head to link elements
+ * @lock:      lock for this structure
+ * @tdev:      pointer to t3cdev used by cxgb3 driver
+ * @pdev:      pointer to pci dev
+ * @hba_cnt:   # of hbas (the same as # of ports)
+ * @hba:       all the hbas on this adapter
+ * @tx_max_size: max. tx packet size supported
+ * @rx_max_size: max. rx packet size supported
+ * @tag_format: ulp tag format settings
+ * @ddp:       ulp ddp state
+ */
+struct cxgb3i_adapter {
+       struct list_head list_head;
+       spinlock_t lock;
+       struct t3cdev *tdev;
+       struct pci_dev *pdev;
+       unsigned char hba_cnt;
+       struct cxgb3i_hba *hba[MAX_NPORTS];
+
+       unsigned int tx_max_size;
+       unsigned int rx_max_size;
+
+       struct cxgb3i_tag_format tag_format;
+       struct cxgb3i_ddp_info ddp;
+};
+
+/**
+ * struct cxgb3i_conn - cxgb3i iscsi connection
+ *
+ * @tcp_conn:  pointer to iscsi_tcp_conn structure
+ * @listhead:  list head to link elements
+ * @conn:      pointer to iscsi_conn structure
+ * @hba:       pointer to the hba this conn. is going through
+ */
+struct cxgb3i_conn {
+       struct iscsi_tcp_conn tcp_conn;
+       struct list_head list_head;
+       struct cxgb3i_endpoint *cep;
+       struct iscsi_conn *conn;
+       struct cxgb3i_hba *hba;
+};
+
+/**
+ * struct cxgb3i_endpoint - iscsi tcp endpoint
+ *
+ * @c3cn:      the h/w tcp connection representation
+ * @hba:       pointer to the hba this conn. is going through
+ * @cconn:     pointer to the associated cxgb3i iscsi connection
+ */
+struct cxgb3i_endpoint {
+       struct s3_conn *c3cn;
+       struct cxgb3i_hba *hba;
+       struct cxgb3i_conn *cconn;
+};
+
+/*
+ * Function Prototypes
+ */
+int cxgb3i_iscsi_init(void);
+void cxgb3i_iscsi_cleanup(void);
+
+struct cxgb3i_adapter *cxgb3i_adapter_add(struct t3cdev *);
+void cxgb3i_adapter_remove(struct t3cdev *);
+int cxgb3i_adapter_ulp_init(struct cxgb3i_adapter *);
+void cxgb3i_adapter_ulp_cleanup(struct cxgb3i_adapter *);
+
+struct cxgb3i_hba *cxgb3i_hba_find_by_netdev(struct net_device *);
+struct cxgb3i_hba *cxgb3i_hba_host_add(struct cxgb3i_adapter *,
+                                      struct net_device *);
+void cxgb3i_hba_host_remove(struct cxgb3i_hba *);
+
+int cxgb3i_ulp2_init(void);
+void cxgb3i_ulp2_cleanup(void);
+int cxgb3i_conn_ulp_setup(struct cxgb3i_conn *, int, int);
+void cxgb3i_ddp_tag_release(struct cxgb3i_adapter *, u32,
+                           struct scatterlist *, unsigned int);
+u32 cxgb3i_ddp_tag_reserve(struct cxgb3i_adapter *, unsigned int,
+                          u32, unsigned int, struct scatterlist *,
+                          unsigned int);
+int cxgb3i_conn_ulp2_xmit(struct iscsi_conn *);
+#endif
--- /dev/null
+++ b/drivers/scsi/cxgb3i/cxgb3i_init.c
@@ -0,0 +1,109 @@
+/* cxgb3i_init.c: Chelsio S3xx iSCSI driver.
+ *
+ * Copyright (c) 2008 Chelsio Communications, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation.
+ *
+ * Written by: Karen Xie (kxie@chelsio.com)
+ */
+
+#include "cxgb3i.h"
+
+#define DRV_MODULE_NAME         "cxgb3i"
+#define DRV_MODULE_VERSION     "1.0.0"
+#define DRV_MODULE_RELDATE     "Jun. 1, 2008"
+
+static char version[] =
+       "Chelsio S3xx iSCSI Driver " DRV_MODULE_NAME
+       " v" DRV_MODULE_VERSION " (" DRV_MODULE_RELDATE ")\n";
+
+MODULE_AUTHOR("Karen Xie <kxie@chelsio.com>");
+MODULE_DESCRIPTION("Chelsio S3xx iSCSI Driver");
+MODULE_LICENSE("GPL");
+MODULE_VERSION(DRV_MODULE_VERSION);
+
+static void open_s3_dev(struct t3cdev *);
+static void close_s3_dev(struct t3cdev *);
+
+static cxgb3_cpl_handler_func cxgb3i_cpl_handlers[NUM_CPL_CMDS];
+static struct cxgb3_client t3c_client = {
+       .name = "iscsi_cxgb3",
+       .handlers = cxgb3i_cpl_handlers,
+       .add = open_s3_dev,
+       .remove = close_s3_dev,
+};
+
+/**
+ * open_s3_dev - register with cxgb3 LLD
+ * @t3dev:     cxgb3 adapter instance
+ */
+static void open_s3_dev(struct t3cdev *t3dev)
+{
+       static int vers_printed;
+
+       if (!vers_printed) {
+               printk(KERN_INFO "%s", version);
+               vers_printed = 1;
+       }
+
+       cxgb3i_log_debug("open cxgb3 %s.\n", t3dev->name);
+       cxgb3i_sdev_add(t3dev, &t3c_client);
+       cxgb3i_adapter_add(t3dev);
+}
+
+/**
+ * close_s3_dev - de-register with cxgb3 LLD
+ * @t3dev:     cxgb3 adapter instance
+ */
+static void close_s3_dev(struct t3cdev *t3dev)
+{
+       cxgb3i_log_debug("close cxgb3 %s.\n", t3dev->name);
+       cxgb3i_adapter_remove(t3dev);
+       cxgb3i_sdev_remove(t3dev);
+}
+
+/**
+ * cxgb3i_init_module - module init entry point
+ *
+ * initialize any driver wide global data structures and register itself
+ *     with the cxgb3 module
+ */
+static int __init cxgb3i_init_module(void)
+{
+       int err;
+
+       err = cxgb3i_sdev_init(cxgb3i_cpl_handlers);
+       if (err < 0)
+               return err;
+
+       err = cxgb3i_iscsi_init();
+       if (err < 0)
+               return err;
+
+       err = cxgb3i_ulp2_init();
+       if (err < 0)
+               return err;
+
+       cxgb3_register_client(&t3c_client);
+
+       return 0;
+}
+
+/**
+ * cxgb3i_exit_module - module cleanup/exit entry point
+ *
+ * go through the driver hba list and for each hba, release any resource held.
+ *     and unregisters iscsi transport and the cxgb3 module
+ */
+static void __exit cxgb3i_exit_module(void)
+{
+       cxgb3_unregister_client(&t3c_client);
+       cxgb3i_ulp2_cleanup();
+       cxgb3i_iscsi_cleanup();
+       cxgb3i_sdev_cleanup();
+}
+
+module_init(cxgb3i_init_module);
+module_exit(cxgb3i_exit_module);
--- /dev/null
+++ b/drivers/scsi/cxgb3i/cxgb3i_iscsi.c
@@ -0,0 +1,854 @@
+/* cxgb3i_iscsi.c: Chelsio S3xx iSCSI driver.
+ *
+ * Copyright (c) 2008 Chelsio Communications, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation.
+ *
+ * Written by: Karen Xie (kxie@chelsio.com)
+ */
+
+#include <linux/inet.h>
+#include <linux/crypto.h>
+#include <net/tcp.h>
+#include <scsi/scsi_cmnd.h>
+#include <scsi/scsi_device.h>
+#include <scsi/scsi_eh.h>
+#include <scsi/scsi_host.h>
+#include <scsi/scsi.h>
+#include <scsi/iscsi_proto.h>
+#include <scsi/libiscsi.h>
+#include <scsi/scsi_transport_iscsi.h>
+
+#include "cxgb3i.h"
+
+static struct scsi_transport_template *cxgb3i_scsi_transport;
+static struct scsi_host_template cxgb3i_host_template;
+static struct iscsi_transport cxgb3i_iscsi_transport;
+
+static LIST_HEAD(cxgb3i_snic_list);
+static DEFINE_RWLOCK(cxgb3i_snic_rwlock);
+
+/**
+ * cxgb3i_adapter_add - init a s3 adapter structure and any h/w settings
+ * @snic:      pointer to adapter instance
+ */
+struct cxgb3i_adapter *cxgb3i_adapter_add(struct t3cdev *t3dev)
+{
+       struct cxgb3i_adapter *snic;
+       struct adapter *adapter = tdev2adap(t3dev);
+       int i;
+
+       snic = kzalloc(sizeof(*snic), GFP_KERNEL);
+       if (!snic) {
+               cxgb3i_log_debug("cxgb3 %s, OOM.\n", t3dev->name);
+               return NULL;
+       }
+
+       spin_lock_init(&snic->lock);
+       snic->tdev = t3dev;
+       snic->pdev = adapter->pdev;
+
+       if (cxgb3i_adapter_ulp_init(snic))
+               goto free_snic;
+
+       for_each_port(adapter, i) {
+               snic->hba[i] = cxgb3i_hba_host_add(snic, adapter->port[i]);
+               if (!snic->hba[i])
+                       goto ulp_cleanup;
+       }
+       snic->hba_cnt = adapter->params.nports;
+
+       /* add to the list */
+       write_lock(&cxgb3i_snic_rwlock);
+       list_add_tail(&snic->list_head, &cxgb3i_snic_list);
+       write_unlock(&cxgb3i_snic_rwlock);
+
+       return snic;
+
+ulp_cleanup:
+       cxgb3i_adapter_ulp_cleanup(snic);
+free_snic:
+       kfree(snic);
+       return NULL;
+}
+
+/**
+ * cxgb3i_snic_cleanup - release all the resources held and cleanup h/w settings
+ * @snic:      pointer to adapter instance
+ */
+void cxgb3i_adapter_remove(struct t3cdev *t3dev)
+{
+       int i;
+       struct cxgb3i_adapter *snic;
+
+       /* remove from the list */
+       read_lock(&cxgb3i_snic_rwlock);
+       list_for_each_entry(snic, &cxgb3i_snic_list, list_head) {
+               if (snic->tdev == t3dev) {
+                       list_del(&snic->list_head);
+                       break;
+               }
+       }
+       write_unlock(&cxgb3i_snic_rwlock);
+
+       if (snic) {
+               for (i = 0; i < snic->hba_cnt; i++) {
+                       if (snic->hba[i]) {
+                               cxgb3i_hba_host_remove(snic->hba[i]);
+                               snic->hba[i] = NULL;
+                       }
+               }
+
+               /* release ddp resources */
+               cxgb3i_adapter_ulp_cleanup(snic);
+               kfree(snic);
+       }
+}
+
+struct cxgb3i_hba *cxgb3i_hba_find_by_netdev(struct net_device *ndev)
+{
+       struct cxgb3i_adapter *snic;
+       int i;
+
+       read_lock(&cxgb3i_snic_rwlock);
+       list_for_each_entry(snic, &cxgb3i_snic_list, list_head) {
+               for (i = 0; i < snic->hba_cnt; i++) {
+                       if (snic->hba[i]->ndev == ndev) {
+                               read_unlock(&cxgb3i_snic_rwlock);
+                               return snic->hba[i];
+                       }
+               }
+       }
+       read_unlock(&cxgb3i_snic_rwlock);
+       return NULL;
+}
+
+struct cxgb3i_hba *cxgb3i_hba_host_add(struct cxgb3i_adapter *snic,
+                                      struct net_device *ndev)
+{
+       struct cxgb3i_hba *hba;
+       struct Scsi_Host *shost;
+       int err;
+
+       shost = iscsi_host_alloc(&cxgb3i_host_template,
+                                sizeof(struct cxgb3i_hba),
+                                CXGB3I_SCSI_QDEPTH_DFLT);
+       if (!shost) {
+               cxgb3i_log_info("iscsi_host_alloc failed.\n");
+               return NULL;
+       }
+
+       shost->transportt = cxgb3i_scsi_transport;
+       shost->max_lun = CXGB3I_MAX_LUN;
+       shost->max_id = CXGB3I_MAX_TARGET;
+       shost->max_channel = 0;
+       shost->max_cmd_len = 16;
+
+       hba = iscsi_host_priv(shost);
+       hba->snic = snic;
+       hba->ndev = ndev;
+       hba->shost = shost;
+
+       pci_dev_get(snic->pdev);
+       err = iscsi_host_add(shost, &snic->pdev->dev);
+       if (err) {
+               cxgb3i_log_info("iscsi_host_add failed.\n");
+               goto pci_dev_put;
+       }
+
+       cxgb3i_log_debug("shost 0x%p, hba 0x%p, no %u.\n",
+                        shost, hba, shost->host_no);
+
+       return hba;
+
+pci_dev_put:
+       pci_dev_put(snic->pdev);
+       scsi_host_put(shost);
+       return NULL;
+}
+
+void cxgb3i_hba_host_remove(struct cxgb3i_hba *hba)
+{
+       cxgb3i_log_debug("shost 0x%p, hba 0x%p, no %u.\n",
+                        hba->shost, hba, hba->shost->host_no);
+       iscsi_host_remove(hba->shost);
+       pci_dev_put(hba->snic->pdev);
+       iscsi_host_free(hba->shost);
+}
+
+/**
+ * cxgb3i_ep_connect - establish TCP connection to target portal
+ * @dst_addr:          target IP address
+ * @non_blocking:      blocking or non-blocking call
+ *
+ * Initiates a TCP/IP connection to the dst_addr
+ */
+static struct iscsi_endpoint *cxgb3i_ep_connect(struct sockaddr *dst_addr,
+                                               int non_blocking)
+{
+       struct iscsi_endpoint *ep;
+       struct cxgb3i_endpoint *cep;
+       struct cxgb3i_hba *hba;
+       struct s3_conn *c3cn = NULL;
+       int err = 0;
+
+       c3cn = cxgb3i_c3cn_create();
+       if (!c3cn) {
+               cxgb3i_log_info("ep connect OOM.\n");
+               err = -ENOMEM;
+               goto release_conn;
+       }
+
+       err = cxgb3i_c3cn_connect(c3cn, (struct sockaddr_in *)dst_addr);
+       if (err < 0) {
+               cxgb3i_log_info("ep connect failed.\n");
+               goto release_conn;
+       }
+       hba = cxgb3i_hba_find_by_netdev(c3cn->dst_cache->dev);
+       if (!hba) {
+               err = -ENOSPC;
+               cxgb3i_log_info("NOT going through cxgbi device.\n");
+               goto release_conn;
+       }
+       if (c3cn_in_state(c3cn, C3CN_STATE_CLOSE)) {
+               err = -ENOSPC;
+               cxgb3i_log_info("ep connect unable to connect.\n");
+               goto release_conn;
+       }
+
+       ep = iscsi_create_endpoint(sizeof(*cep));
+       if (!ep) {
+               err = -ENOMEM;
+               cxgb3i_log_info("iscsi alloc ep, OOM.\n");
+               goto release_conn;
+       }
+       cep = ep->dd_data;
+       cep->c3cn = c3cn;
+       cep->hba = hba;
+
+       cxgb3i_log_debug("ep 0x%p, 0x%p, c3cn 0x%p, hba 0x%p.\n",
+                         ep, cep, c3cn, hba);
+       return ep;
+
+release_conn:
+       cxgb3i_log_debug("conn 0x%p failed, release.\n", c3cn);
+       if (c3cn)
+               cxgb3i_c3cn_release(c3cn);
+       return ERR_PTR(err);
+}
+
+/**
+ * cxgb3i_ep_poll - polls for TCP connection establishement
+ * @ep:                TCP connection (endpoint) handle
+ * @timeout_ms:        timeout value in milli secs
+ *
+ * polls for TCP connect request to complete
+ */
+static int cxgb3i_ep_poll(struct iscsi_endpoint *ep, int timeout_ms)
+{
+       struct cxgb3i_endpoint *cep = ep->dd_data;
+       struct s3_conn *c3cn = cep->c3cn;
+
+       if (!c3cn_in_state(c3cn, C3CN_STATE_ESTABLISHED))
+               return 0;
+       cxgb3i_log_debug("ep 0x%p, c3cn 0x%p established.\n", ep, c3cn);
+       return 1;
+}
+
+/**
+ * cxgb3i_ep_disconnect - teardown TCP connection
+ * @ep:                TCP connection (endpoint) handle
+ *
+ * teardown TCP connection
+ */
+static void cxgb3i_ep_disconnect(struct iscsi_endpoint *ep)
+{
+       struct cxgb3i_endpoint *cep = ep->dd_data;
+       struct cxgb3i_conn *cconn = cep->cconn;
+
+       cxgb3i_log_debug("ep 0x%p, cep 0x%p.\n", ep, cep);
+
+       if (cconn && cconn->conn) {
+               struct iscsi_tcp_conn *tcp_conn = &cconn->tcp_conn;
+
+               /*
+                * stop the xmit path so the xmit_segment function is
+                * not being called
+                */
+               write_lock_bh(&cep->c3cn->callback_lock);
+               set_bit(ISCSI_SUSPEND_BIT, &cconn->conn->suspend_rx);
+               cep->c3cn->user_data = NULL;
+               cconn->cep = NULL;
+               tcp_conn->sock = NULL;
+               write_unlock_bh(&cep->c3cn->callback_lock);
+       }
+
+       cxgb3i_log_debug("ep 0x%p, cep 0x%p, release c3cn 0x%p.\n",
+                        ep, cep, cep->c3cn);
+       cxgb3i_c3cn_release(cep->c3cn);
+       iscsi_destroy_endpoint(ep);
+}
+
+/**
+ * cxgb3i_session_create - create a new iscsi session
+ * @cmds_max:          max # of commands
+ * @qdepth:            scsi queue depth
+ * @initial_cmdsn:     initial iscsi CMDSN for this session
+ * @host_no:           pointer to return host no
+ *
+ * Creates a new iSCSI session
+ */
+static struct iscsi_cls_session *
+cxgb3i_session_create(struct iscsi_endpoint *ep, u16 cmds_max, u16 qdepth,
+                     u32 initial_cmdsn, u32 *host_no)
+{
+       struct cxgb3i_endpoint *cep;
+       struct cxgb3i_hba *hba;
+       struct Scsi_Host *shost;
+       struct iscsi_cls_session *cls_session;
+       struct iscsi_session *session;
+       int i;
+
+       if (!ep) {
+               cxgb3i_log_error("%s, missing endpoint.\n", __func__);
+               return NULL;
+       }
+
+       cep = ep->dd_data;
+       hba = cep->hba;
+       shost = hba->shost;
+       cxgb3i_log_debug("ep 0x%p, cep 0x%p, hba 0x%p.\n", ep, cep, hba);
+       BUG_ON(hba != iscsi_host_priv(shost));
+
+       *host_no = shost->host_no;
+
+       cls_session = iscsi_session_setup(&cxgb3i_iscsi_transport, shost,
+                                         cmds_max,
+                                         sizeof(struct iscsi_tcp_task),
+                                         initial_cmdsn, ISCSI_MAX_TARGET);
+       if (!cls_session)
+               return NULL;
+       session = cls_session->dd_data;
+
+       for (i = 0; i < session->cmds_max; i++) {
+               struct iscsi_task *task = session->cmds[i];
+               struct iscsi_tcp_task *tcp_task = task->dd_data;
+
+               task->hdr = &tcp_task->hdr.cmd_hdr;
+               task->hdr_max = sizeof(tcp_task->hdr) - ISCSI_DIGEST_SIZE;
+       }
+
+       if (iscsi_r2tpool_alloc(session))
+               goto remove_session;
+
+       return cls_session;
+
+remove_session:
+       iscsi_session_teardown(cls_session);
+       return NULL;
+}
+
+/**
+ * cxgb3i_session_destroy - destroys iscsi session
+ * @cls_session:       pointer to iscsi cls session
+ *
+ * Destroys an iSCSI session instance and releases its all resources held
+ */
+static void cxgb3i_session_destroy(struct iscsi_cls_session *cls_session)
+{
+       cxgb3i_log_debug("sess 0x%p.\n", cls_session);
+       iscsi_r2tpool_free(cls_session->dd_data);
+       iscsi_session_teardown(cls_session);
+}
+
+/**
+ * cxgb3i_conn_create - create iscsi connection instance
+ * @cls_session:       pointer to iscsi cls session
+ * @cid:               iscsi cid
+ *
+ * Creates a new iSCSI connection instance for a given session
+ */
+static inline void cxgb3i_conn_max_xmit_dlength(struct iscsi_conn *conn)
+{
+       struct cxgb3i_conn *cconn = conn->dd_data;
+
+       if (conn->max_xmit_dlength)
+               conn->max_xmit_dlength = min_t(unsigned int,
+                                               conn->max_xmit_dlength,
+                                               cconn->hba->snic->tx_max_size -
+                                               ISCSI_PDU_HEADER_MAX);
+       else
+               conn->max_xmit_dlength = cconn->hba->snic->tx_max_size -
+                                               ISCSI_PDU_HEADER_MAX;
+       cxgb3i_log_debug("conn 0x%p, max xmit %u.\n",
+                        conn, conn->max_xmit_dlength);
+}
+
+static inline void cxgb3i_conn_max_recv_dlength(struct iscsi_conn *conn)
+{
+       struct cxgb3i_conn *cconn = conn->dd_data;
+
+       if (conn->max_recv_dlength)
+               conn->max_recv_dlength = min_t(unsigned int,
+                                               conn->max_recv_dlength,
+                                               cconn->hba->snic->rx_max_size -
+                                               ISCSI_PDU_HEADER_MAX);
+       else
+               conn->max_recv_dlength = cconn->hba->snic->rx_max_size -
+                                               ISCSI_PDU_HEADER_MAX;
+       cxgb3i_log_debug("conn 0x%p, max recv %u.\n",
+                        conn, conn->max_recv_dlength);
+}
+
+static struct iscsi_cls_conn *cxgb3i_conn_create(struct iscsi_cls_session
+                                                *cls_session, u32 cid)
+{
+       struct iscsi_cls_conn *cls_conn;
+       struct iscsi_conn *conn;
+       struct cxgb3i_conn *cconn;
+
+       cxgb3i_log_debug("sess 0x%p, cid %u.\n", cls_session, cid);
+
+       cls_conn = iscsi_conn_setup(cls_session, sizeof(*cconn), cid);
+       if (!cls_conn)
+               return NULL;
+       conn = cls_conn->dd_data;
+
+       cconn = conn->dd_data;
+       cconn->tcp_conn.iscsi_conn = conn;
+       cconn->conn = conn;
+
+       return cls_conn;
+}
+
+/**
+ * cxgb3i_conn_xmit_segment - transmit segment
+ * @conn:      pointer to iscsi conn
+ */
+static int cxgb3i_conn_xmit_segment(struct iscsi_conn *conn)
+{
+       struct cxgb3i_conn *cconn = conn->dd_data;
+       struct iscsi_tcp_conn *tcp_conn = &cconn->tcp_conn;
+       struct iscsi_segment *segment = &tcp_conn->out.segment;
+
+       if (segment->total_copied < segment->total_size)
+               return cxgb3i_conn_ulp2_xmit(conn);
+       return 0;
+}
+
+/**
+ * cxgb3i_conn_bind - binds iscsi sess, conn and endpoint together
+ * @cls_session:       pointer to iscsi cls session
+ * @cls_conn:          pointer to iscsi cls conn
+ * @transport_eph:     64-bit EP handle
+ * @is_leading:                leading connection on this session?
+ *
+ * Binds together an iSCSI session, an iSCSI connection and a
+ *     TCP connection. This routine returns error code if the TCP
+ *     connection does not belong on the device iSCSI sess/conn is bound
+ */
+
+static int cxgb3i_conn_bind(struct iscsi_cls_session *cls_session,
+                           struct iscsi_cls_conn *cls_conn,
+                           u64 transport_eph, int is_leading)
+{
+       struct iscsi_conn *conn = cls_conn->dd_data;
+       struct cxgb3i_conn *cconn = conn->dd_data;
+       struct iscsi_tcp_conn *tcp_conn = &cconn->tcp_conn;
+       struct iscsi_endpoint *ep;
+       struct cxgb3i_endpoint *cep;
+       struct s3_conn *c3cn;
+       int err;
+
+       ep = iscsi_lookup_endpoint(transport_eph);
+       if (!ep)
+               return -EINVAL;
+
+       cxgb3i_log_debug("ep 0x%p, cls sess 0x%p, cls conn 0x%p.\n",
+                        ep, cls_session, cls_conn);
+
+       err = iscsi_conn_bind(cls_session, cls_conn, is_leading);
+       if (err)
+               return -EINVAL;
+
+       cep = ep->dd_data;
+       c3cn = cep->c3cn;
+
+       read_lock(&c3cn->callback_lock);
+       /* mnc: TODO don't abuse iscsi_tcp fields */
+       tcp_conn->sock = (struct socket *)c3cn;
+       c3cn->user_data = conn;
+       read_unlock(&c3cn->callback_lock);
+
+       cconn->hba = cep->hba;
+       cconn->cep = cep;
+       cep->cconn = cconn;
+
+       cxgb3i_conn_max_xmit_dlength(conn);
+       cxgb3i_conn_max_recv_dlength(conn);
+
+       spin_lock_bh(&conn->session->lock);
+       sprintf(conn->portal_address, NIPQUAD_FMT,
+               NIPQUAD(c3cn->daddr.sin_addr.s_addr));
+       conn->portal_port = ntohs(c3cn->daddr.sin_port);
+       spin_unlock_bh(&conn->session->lock);
+
+       tcp_conn->xmit_segment = cxgb3i_conn_xmit_segment;
+       iscsi_tcp_hdr_recv_prep(tcp_conn);
+
+       return 0;
+}
+
+/**
+ * cxgb3i_conn_get_param - return iscsi connection parameter to caller
+ * @cls_conn:  pointer to iscsi cls conn
+ * @param:     parameter type identifier
+ * @buf:       buffer pointer
+ *
+ * returns iSCSI connection parameters
+ */
+static int cxgb3i_conn_get_param(struct iscsi_cls_conn *cls_conn,
+                                enum iscsi_param param, char *buf)
+{
+       struct iscsi_conn *conn = cls_conn->dd_data;
+       int len;
+
+       cxgb3i_log_debug("cls_conn 0x%p, param %d.\n", cls_conn, param);
+
+       switch (param) {
+       case ISCSI_PARAM_CONN_PORT:
+               spin_lock_bh(&conn->session->lock);
+               len = sprintf(buf, "%hu\n", conn->portal_port);
+               spin_unlock_bh(&conn->session->lock);
+               break;
+       case ISCSI_PARAM_CONN_ADDRESS:
+               spin_lock_bh(&conn->session->lock);
+               len = sprintf(buf, "%s\n", conn->portal_address);
+               spin_unlock_bh(&conn->session->lock);
+               break;
+       default:
+               return iscsi_conn_get_param(cls_conn, param, buf);
+       }
+
+       return len;
+}
+
+static int cxgb3i_conn_set_param(struct iscsi_cls_conn *cls_conn,
+                                enum iscsi_param param, char *buf, int buflen)
+{
+       struct iscsi_conn *conn = cls_conn->dd_data;
+       struct iscsi_session *session = conn->session;
+       struct cxgb3i_conn *cconn = conn->dd_data;
+       int value, err = 0;
+
+       switch (param) {
+       case ISCSI_PARAM_HDRDGST_EN:
+               err = iscsi_set_param(cls_conn, param, buf, buflen);
+               if (!err && conn->hdrdgst_en)
+                       cxgb3i_conn_ulp_setup(cconn, conn->hdrdgst_en,
+                                             conn->datadgst_en);
+               break;
+       case ISCSI_PARAM_DATADGST_EN:
+               err = iscsi_set_param(cls_conn, param, buf, buflen);
+               if (!err && conn->datadgst_en)
+                       cxgb3i_conn_ulp_setup(cconn, conn->hdrdgst_en,
+                                             conn->datadgst_en);
+               break;
+       case ISCSI_PARAM_MAX_R2T:
+               sscanf(buf, "%d", &value);
+               if (value <= 0 || !is_power_of_2(value))
+                       return -EINVAL;
+               if (session->max_r2t == value)
+                       break;
+               iscsi_r2tpool_free(session);
+               err = iscsi_set_param(cls_conn, param, buf, buflen);
+               if (!err && iscsi_r2tpool_alloc(session))
+                       return -ENOMEM;
+       case ISCSI_PARAM_MAX_RECV_DLENGTH:
+               err = iscsi_set_param(cls_conn, param, buf, buflen);
+               cxgb3i_conn_max_recv_dlength(conn);
+               break;
+       case ISCSI_PARAM_MAX_XMIT_DLENGTH:
+               err = iscsi_set_param(cls_conn, param, buf, buflen);
+               cxgb3i_conn_max_xmit_dlength(conn);
+               break;
+       default:
+               return iscsi_set_param(cls_conn, param, buf, buflen);
+       }
+       return err;
+}
+
+/**
+ * cxgb3i_host_set_param - configure host (adapter) related parameters
+ * @shost:     scsi host pointer
+ * @param:     parameter type identifier
+ * @buf:       buffer pointer
+ */
+static int cxgb3i_host_set_param(struct Scsi_Host *shost,
+                                enum iscsi_host_param param,
+                                char *buf, int buflen)
+{
+       struct cxgb3i_hba *hba = iscsi_host_priv(shost);
+
+       cxgb3i_log_debug("param %d, buf %s.\n", param, buf);
+
+       if (hba && param == ISCSI_HOST_PARAM_IPADDRESS) {
+               __be32 addr = in_aton(buf);
+               cxgb3i_set_private_ipv4addr(hba->ndev, addr);
+               return 0;
+       }
+
+       return iscsi_host_get_param(shost, param, buf);
+}
+
+/**
+ * cxgb3i_host_get_param - returns host (adapter) related parameters
+ * @shost:     scsi host pointer
+ * @param:     parameter type identifier
+ * @buf:       buffer pointer
+ */
+static int cxgb3i_host_get_param(struct Scsi_Host *shost,
+                                enum iscsi_host_param param, char *buf)
+{
+       struct cxgb3i_hba *hba = iscsi_host_priv(shost);
+       int i;
+       int len = 0;
+
+       cxgb3i_log_debug("hba %s, param %d.\n", hba->ndev->name, param);
+
+       switch (param) {
+       case ISCSI_HOST_PARAM_HWADDRESS:
+               for (i = 0; i < 6; i++)
+                       len +=
+                           sprintf(buf + len, "%02x.",
+                                   hba->ndev->dev_addr[i]);
+               len--;
+               buf[len] = '\0';
+               break;
+       case ISCSI_HOST_PARAM_NETDEV_NAME:
+               len = sprintf(buf, "%s\n", hba->ndev->name);
+               break;
+       case ISCSI_HOST_PARAM_IPADDRESS:
+       {
+               __be32 addr;
+
+               addr = cxgb3i_get_private_ipv4addr(hba->ndev);
+               len = sprintf(buf, "%u.%u.%u.%u", NIPQUAD(addr));
+               break;
+       }
+       default:
+               return iscsi_host_get_param(shost, param, buf);
+       }
+       return len;
+}
+
+/**
+ * cxgb3i_conn_get_stats - returns iSCSI stats
+ * @cls_conn:  pointer to iscsi cls conn
+ * @stats:     pointer to iscsi statistic struct
+ */
+static void cxgb3i_conn_get_stats(struct iscsi_cls_conn *cls_conn,
+                                 struct iscsi_stats *stats)
+{
+       struct iscsi_conn *conn = cls_conn->dd_data;
+
+       stats->txdata_octets = conn->txdata_octets;
+       stats->rxdata_octets = conn->rxdata_octets;
+       stats->scsicmd_pdus = conn->scsicmd_pdus_cnt;
+       stats->dataout_pdus = conn->dataout_pdus_cnt;
+       stats->scsirsp_pdus = conn->scsirsp_pdus_cnt;
+       stats->datain_pdus = conn->datain_pdus_cnt;
+       stats->r2t_pdus = conn->r2t_pdus_cnt;
+       stats->tmfcmd_pdus = conn->tmfcmd_pdus_cnt;
+       stats->tmfrsp_pdus = conn->tmfrsp_pdus_cnt;
+       stats->digest_err = 0;
+       stats->timeout_err = 0;
+       stats->custom_length = 1;
+       strcpy(stats->custom[0].desc, "eh_abort_cnt");
+       stats->custom[0].value = conn->eh_abort_cnt;
+}
+
+static inline u32 tag_base(struct cxgb3i_tag_format *format,
+                          unsigned int idx, unsigned int age)
+{
+       u32 sw_bits = idx | (age << format->idx_bits);
+       u32 tag = sw_bits >> format->rsvd_shift;
+
+       tag <<= format->rsvd_bits + format->rsvd_shift;
+       tag |= sw_bits & ((1 << format->rsvd_shift) - 1);
+       return tag;
+}
+
+static inline void cxgb3i_parse_tag(struct cxgb3i_tag_format *format,
+                                   u32 tag, u32 *rsvd_bits, u32 *sw_bits)
+{
+       if (rsvd_bits)
+               *rsvd_bits = (tag >> format->rsvd_shift) & format->rsvd_mask;
+       if (sw_bits) {
+               *sw_bits = (tag >> (format->rsvd_shift + format->rsvd_bits))
+                           << format->rsvd_shift;
+               *sw_bits |= tag & ((1 << format->rsvd_shift) - 1);
+       }
+}
+
+
+static void cxgb3i_parse_itt(struct iscsi_conn *conn, itt_t itt,
+                            int *idx, int *age)
+{
+       struct cxgb3i_conn *cconn = conn->dd_data;
+       struct cxgb3i_adapter *snic = cconn->hba->snic;
+       u32 sw_bits;
+
+       cxgb3i_parse_tag(&snic->tag_format, itt, NULL, &sw_bits);
+       if (idx)
+               *idx = sw_bits & ISCSI_ITT_MASK;
+       if (age)
+               *age = (sw_bits >> snic->tag_format.idx_bits) & ISCSI_AGE_MASK;
+}
+
+static int cxgb3i_reserve_itt(struct iscsi_task *task, itt_t *hdr_itt)
+{
+       struct scsi_cmnd *sc = task->sc;
+       struct iscsi_conn *conn = task->conn;
+       struct iscsi_session *sess = conn->session;
+       struct cxgb3i_conn *cconn = conn->dd_data;
+       struct iscsi_tcp_conn *tcp_conn = &cconn->tcp_conn;
+       struct cxgb3i_adapter *snic = cconn->hba->snic;
+       u32 sw_tag = tag_base(&snic->tag_format, task->itt, sess->age);
+       u32 tag = RESERVED_ITT;
+
+       if (sc && (sc->sc_data_direction == DMA_FROM_DEVICE)) {
+               struct s3_conn *c3cn = (struct s3_conn *)(tcp_conn->sock);
+               tag =
+                   cxgb3i_ddp_tag_reserve(snic, c3cn->tid, sw_tag,
+                                          scsi_out(sc)->length,
+                                          scsi_out(sc)->table.sgl,
+                                          scsi_out(sc)->table.nents);
+       }
+       if (tag == RESERVED_ITT)
+               tag = sw_tag | (snic->tag_format.rsvd_mask <<
+                               snic->tag_format.rsvd_shift);
+       *hdr_itt = htonl(tag);
+       return 0;
+}
+
+static void cxgb3i_release_itt(struct iscsi_task *task, itt_t hdr_itt)
+{
+       struct scsi_cmnd *sc = task->sc;
+       struct iscsi_conn *conn = task->conn;
+       struct cxgb3i_conn *cconn = conn->dd_data;
+       struct cxgb3i_adapter *snic = cconn->hba->snic;
+
+       hdr_itt = ntohl(hdr_itt);
+       if (sc && (sc->sc_data_direction == DMA_FROM_DEVICE))
+               cxgb3i_ddp_tag_release(snic, hdr_itt,
+                                      scsi_out(sc)->table.sgl,
+                                      scsi_out(sc)->table.nents);
+}
+
+/**
+ * cxgb3i_host_template -- Scsi_Host_Template structure
+ *     used when registering with the scsi mid layer
+ */
+static struct scsi_host_template cxgb3i_host_template = {
+       .module = THIS_MODULE,
+       .name = "Chelsio S3xx iSCSI Initiator",
+       .proc_name = "cxgb3i",
+       .queuecommand = iscsi_queuecommand,
+       .change_queue_depth = iscsi_change_queue_depth,
+       .can_queue = 128 * (ISCSI_DEF_XMIT_CMDS_MAX - 1),
+       .sg_tablesize = SG_ALL,
+       .max_sectors = 0xFFFF,
+       .cmd_per_lun = ISCSI_DEF_CMD_PER_LUN,
+       .eh_abort_handler = iscsi_eh_abort,
+       .eh_device_reset_handler = iscsi_eh_device_reset,
+       .eh_target_reset_handler = iscsi_eh_host_reset,
+       .use_clustering = DISABLE_CLUSTERING,
+       .this_id = -1,
+};
+
+static struct iscsi_transport cxgb3i_iscsi_transport = {
+       .owner = THIS_MODULE,
+       .name = "cxgb3i",
+       .caps = CAP_RECOVERY_L0 | CAP_MULTI_R2T | CAP_HDRDGST
+           | CAP_DATADGST | CAP_DIGEST_OFFLOAD,
+       .param_mask = ISCSI_MAX_RECV_DLENGTH |
+           ISCSI_MAX_XMIT_DLENGTH |
+           ISCSI_HDRDGST_EN |
+           ISCSI_DATADGST_EN |
+           ISCSI_INITIAL_R2T_EN |
+           ISCSI_MAX_R2T |
+           ISCSI_IMM_DATA_EN |
+           ISCSI_FIRST_BURST |
+           ISCSI_MAX_BURST |
+           ISCSI_PDU_INORDER_EN |
+           ISCSI_DATASEQ_INORDER_EN |
+           ISCSI_ERL |
+           ISCSI_CONN_PORT |
+           ISCSI_CONN_ADDRESS |
+           ISCSI_EXP_STATSN |
+           ISCSI_PERSISTENT_PORT |
+           ISCSI_PERSISTENT_ADDRESS |
+           ISCSI_TARGET_NAME | ISCSI_TPGT |
+           ISCSI_USERNAME | ISCSI_PASSWORD |
+           ISCSI_USERNAME_IN | ISCSI_PASSWORD_IN |
+           ISCSI_FAST_ABORT | ISCSI_ABORT_TMO |
+           ISCSI_LU_RESET_TMO |
+           ISCSI_PING_TMO | ISCSI_RECV_TMO |
+           ISCSI_IFACE_NAME | ISCSI_INITIATOR_NAME,
+       .host_param_mask = ISCSI_HOST_HWADDRESS | ISCSI_HOST_IPADDRESS |
+           ISCSI_HOST_INITIATOR_NAME | ISCSI_HOST_NETDEV_NAME,
+       .get_host_param = cxgb3i_host_get_param,
+       .set_host_param = cxgb3i_host_set_param,
+       /* session management */
+       .create_session = cxgb3i_session_create,
+       .destroy_session = cxgb3i_session_destroy,
+       .get_session_param = iscsi_session_get_param,
+       /* connection management */
+       .create_conn = cxgb3i_conn_create,
+       .bind_conn = cxgb3i_conn_bind,
+       .destroy_conn = iscsi_conn_teardown,
+       .start_conn = iscsi_conn_start,
+       .stop_conn = iscsi_conn_stop,
+       .get_conn_param = cxgb3i_conn_get_param,
+       .set_param = cxgb3i_conn_set_param,
+       .get_stats = cxgb3i_conn_get_stats,
+       /* pdu xmit req. from user space */
+       .send_pdu = iscsi_conn_send_pdu,
+       /* task */
+       .init_task = iscsi_tcp_task_init,
+       .xmit_task = iscsi_tcp_task_xmit,
+       .cleanup_task = iscsi_tcp_cleanup_task,
+       .parse_itt = cxgb3i_parse_itt,
+       .reserve_itt = cxgb3i_reserve_itt,
+       .release_itt = cxgb3i_release_itt,
+       /* TCP connect/disconnect */
+       .ep_connect = cxgb3i_ep_connect,
+       .ep_poll = cxgb3i_ep_poll,
+       .ep_disconnect = cxgb3i_ep_disconnect,
+       /* Error recovery timeout call */
+       .session_recovery_timedout = iscsi_session_recovery_timedout,
+};
+
+int cxgb3i_iscsi_init(void)
+{
+       cxgb3i_scsi_transport =
+           iscsi_register_transport(&cxgb3i_iscsi_transport);
+       if (!cxgb3i_scsi_transport) {
+               cxgb3i_log_error("Could not register cxgb3i transport.\n");
+               return -ENODEV;
+       }
+       cxgb3i_log_debug("cxgb3i transport 0x%p.\n", cxgb3i_scsi_transport);
+       return 0;
+}
+
+void cxgb3i_iscsi_cleanup(void)
+{
+       if (cxgb3i_scsi_transport) {
+               cxgb3i_log_debug("cxgb3i transport 0x%p.\n",
+                                cxgb3i_scsi_transport);
+               iscsi_unregister_transport(&cxgb3i_iscsi_transport);
+       }
+}
--- /dev/null
+++ b/drivers/scsi/cxgb3i/cxgb3i_offload.c
@@ -0,0 +1,2021 @@
+/*
+ * Copyright (C) 2003-2008 Chelsio Communications.  All rights reserved.
+ *
+ * Written by Dimitris Michailidis (dm@chelsio.com)
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the LICENSE file included in this
+ * release for licensing terms and conditions.
+ */
+
+#include <linux/if_vlan.h>
+#include <linux/version.h>
+
+#include "cxgb3_defs.h"
+#include "cxgb3_ctl_defs.h"
+#include "firmware_exports.h"
+#include "cxgb3i_offload.h"
+#include "cxgb3i_ulp2.h"
+
+static int cxgb3_rcv_win = 256 * 1024;
+module_param(cxgb3_rcv_win, int, 0644);
+MODULE_PARM_DESC(cxgb3_rcv_win, "TCP receive window in bytes (default=256KB)");
+
+static int cxgb3_snd_win = 64 * 1024;
+module_param(cxgb3_snd_win, int, 0644);
+MODULE_PARM_DESC(cxgb3_snd_win, "TCP send window in bytes (default=64KB)");
+
+static int cxgb3_rx_credit_thres = 10 * 1024;
+module_param(cxgb3_rx_credit_thres, int, 0644);
+MODULE_PARM_DESC(rx_credit_thres,
+                "RX credits return threshold in bytes (default=10KB)");
+
+static unsigned int cxgb3_max_connect = 8 * 1024;
+module_param(cxgb3_max_connect, uint, 0644);
+MODULE_PARM_DESC(cxgb3_max_connect, "Max. # of connections (default=8092)");
+
+static unsigned int cxgb3_sport_base = 20000;
+module_param(cxgb3_sport_base, uint, 0644);
+MODULE_PARM_DESC(cxgb3_sport_base, "starting port number (default=20000)");
+
+#ifdef __DEBUG_C3CN_TX__
+#define c3cn_tx_debug         cxgb3i_log_debug
+#else
+#define c3cn_tx_debug(fmt...)
+#endif
+
+/* connection flags */
+static inline void c3cn_set_flag(struct s3_conn *c3cn, enum c3cn_flags flag)
+{
+       __set_bit(flag, &c3cn->flags);
+       c3cn_conn_debug("c3cn 0x%p, set %d, s 0x%x, f 0x%lx.\n",
+                       c3cn, flag, c3cn->state, c3cn->flags);
+}
+
+static inline void c3cn_reset_flag(struct s3_conn *c3cn, enum c3cn_flags flag)
+{
+       __clear_bit(flag, &c3cn->flags);
+       c3cn_conn_debug("c3cn 0x%p, clear %d, s 0x%x, f 0x%lx.\n",
+                       c3cn, flag, c3cn->state, c3cn->flags);
+}
+
+static inline int c3cn_flag(struct s3_conn *c3cn, enum c3cn_flags flag)
+{
+       if (c3cn == NULL)
+               return 0;
+       return test_bit(flag, &c3cn->flags);
+}
+
+/* connection state */
+static void c3cn_set_state(struct s3_conn *c3cn, int state)
+{
+       c3cn_conn_debug("c3cn 0x%p state -> 0x%x.\n", c3cn, state);
+       c3cn->state = state;
+}
+
+/* connection reference count */
+static inline void c3cn_hold(struct s3_conn *c3cn)
+{
+       atomic_inc(&c3cn->refcnt);
+}
+
+static inline void c3cn_put(struct s3_conn *c3cn)
+{
+       if (atomic_dec_and_test(&c3cn->refcnt)) {
+               c3cn_conn_debug("free c3cn 0x%p, 0x%x, 0x%lx.\n",
+                               c3cn, c3cn->state, c3cn->flags);
+               kfree(c3cn);
+       }
+}
+
+/* minimal port allocation management scheme */
+static spinlock_t sport_map_lock;
+static unsigned int sport_map_next;
+static unsigned long *sport_map;
+
+/*
+ * Find a free source port in our allocation map.  We use a very simple rotor
+ * scheme to look for the next free port.
+ *
+ * If a source port has been specified make sure that it doesn't collide with
+ * our normal source port allocation map.  If it's outside the range of our
+ * allocation scheme just let them use it.
+ */
+static int c3cn_get_port(struct s3_conn *c3cn)
+{
+       unsigned int start;
+
+       if (!sport_map)
+               goto error_out;
+
+       if (c3cn->saddr.sin_port != 0) {
+               int sport = ntohs(c3cn->saddr.sin_port) - cxgb3_sport_base;
+               int err = 0;
+
+               if (sport < 0 || sport >= cxgb3_max_connect)
+                       return 0;
+               spin_lock(&sport_map_lock);
+               err = __test_and_set_bit(sport, sport_map);
+               spin_unlock(&sport_map_lock);
+               return err ? -EADDRINUSE : 0;
+       }
+
+       spin_lock(&sport_map_lock);
+       start = sport_map_next;
+       do {
+               unsigned int new = sport_map_next;
+               if (++sport_map_next >= cxgb3_max_connect)
+                       sport_map_next = 0;
+               if (!(__test_and_set_bit(new, sport_map))) {
+                       spin_unlock(&sport_map_lock);
+                       c3cn_conn_debug("reserve port %u.\n",
+                                       cxgb3_sport_base + new);
+                       c3cn->saddr.sin_port = htons(cxgb3_sport_base + new);
+                       return 0;
+               }
+       } while (sport_map_next != start);
+       spin_unlock(&sport_map_lock);
+
+error_out:
+       return -EADDRNOTAVAIL;
+}
+
+/*
+ * Deallocate a source port from the allocation map.  If the source port is
+ * outside our allocation range just return -- the caller is responsible for
+ * keeping track of their port usage outside of our allocation map.
+ */
+static void c3cn_put_port(struct s3_conn *c3cn)
+{
+       if (c3cn->saddr.sin_port) {
+               int old = ntohs(c3cn->saddr.sin_port) - cxgb3_sport_base;
+               c3cn->saddr.sin_port = 0;
+
+               if (old < 0 || old >= cxgb3_max_connect)
+                       return;
+
+               c3cn_conn_debug("release port %u.\n", cxgb3_sport_base + old);
+               spin_lock(&sport_map_lock);
+               __clear_bit(old, sport_map);
+               spin_unlock(&sport_map_lock);
+       }
+}
+
+static void c3cn_reset_timer(struct s3_conn *c3cn, struct timer_list *timer,
+                     unsigned long expires)
+{
+       if (!mod_timer(timer, expires))
+               c3cn_hold(c3cn);
+}
+
+typedef int (cxgb3_cpl_handler_decl) (struct t3cdev *,
+                                     struct sk_buff *, void *);
+
+static cxgb3_cpl_handler_decl do_act_establish;
+static cxgb3_cpl_handler_decl do_act_open_rpl;
+static cxgb3_cpl_handler_decl do_wr_ack;
+static cxgb3_cpl_handler_decl do_peer_close;
+static cxgb3_cpl_handler_decl do_abort_req;
+static cxgb3_cpl_handler_decl do_abort_rpl;
+static cxgb3_cpl_handler_decl do_close_con_rpl;
+static cxgb3_cpl_handler_decl do_iscsi_hdr;
+
+static LIST_HEAD(cxgb3_list);
+static DEFINE_MUTEX(cxgb3_list_lock);
+
+/*
+ * For ULP connections HW may inserts digest bytes into the pdu. This array
+ * contains the compensating extra lengths for ULP packets.  It is indexed by
+ * a packet's ULP submode.
+ */
+static const unsigned int cxgb3_ulp_extra_len[] = { 0, 4, 4, 8 };
+
+/*
+ * Return the length of any HW additions that will be made to a Tx packet.
+ * Such additions can happen for some types of ULP packets.
+ */
+static inline unsigned int ulp_extra_len(const struct sk_buff *skb)
+{
+       return cxgb3_ulp_extra_len[skb_ulp_mode(skb) & 3];
+}
+
+/*
+ * Size of WRs in bytes.  Note that we assume all devices we are handling have
+ * the same WR size.
+ */
+static unsigned int wrlen __read_mostly;
+
+/*
+ * The number of WRs needed for an skb depends on the number of page fragments
+ * in the skb and whether it has any payload in its main body.  This maps the
+ * length of the gather list represented by an skb into the # of necessary WRs.
+ */
+static unsigned int skb_wrs[MAX_SKB_FRAGS + 2] __read_mostly;
+
+static void s3_init_wr_tab(unsigned int wr_len)
+{
+       int i;
+
+       if (skb_wrs[1])         /* already initialized */
+               return;
+
+       for (i = 1; i < ARRAY_SIZE(skb_wrs); i++) {
+               int sgl_len = (3 * i) / 2 + (i & 1);
+
+               sgl_len += 3;
+               skb_wrs[i] = (sgl_len <= wr_len
+                             ? 1 : 1 + (sgl_len - 2) / (wr_len - 1));
+       }
+
+       wrlen = wr_len * 8;
+}
+
+/*
+ * cxgb3i API operations.
+ */
+/*
+ * large memory chunk allocation/release
+ */
+void *cxgb3i_alloc_big_mem(unsigned int size)
+{
+       void *p = kmalloc(size, GFP_KERNEL);
+       if (!p)
+               p = vmalloc(size);
+       if (p)
+               memset(p, 0, size);
+       return p;
+}
+
+void cxgb3i_free_big_mem(void *addr)
+{
+       if (is_vmalloc_addr(addr))
+               vfree(addr);
+       else
+               kfree(addr);
+}
+
+void cxgb3i_sdev_cleanup(void)
+{
+       if (sport_map)
+               cxgb3i_free_big_mem(sport_map);
+}
+
+int cxgb3i_sdev_init(cxgb3_cpl_handler_func *cpl_handlers)
+{
+       cpl_handlers[CPL_ACT_ESTABLISH] = do_act_establish;
+       cpl_handlers[CPL_ACT_OPEN_RPL] = do_act_open_rpl;
+       cpl_handlers[CPL_PEER_CLOSE] = do_peer_close;
+       cpl_handlers[CPL_ABORT_REQ_RSS] = do_abort_req;
+       cpl_handlers[CPL_ABORT_RPL_RSS] = do_abort_rpl;
+       cpl_handlers[CPL_CLOSE_CON_RPL] = do_close_con_rpl;
+       cpl_handlers[CPL_TX_DMA_ACK] = do_wr_ack;
+       cpl_handlers[CPL_ISCSI_HDR] = do_iscsi_hdr;
+
+       if (cxgb3_max_connect > CXGB3I_MAX_CONN)
+               cxgb3_max_connect = CXGB3I_MAX_CONN;
+       sport_map = cxgb3i_alloc_big_mem(DIV_ROUND_UP(cxgb3_max_connect,
+                                                     8 *
+                                                     sizeof(unsigned long)));
+       if (!sport_map)
+               return -ENOMEM;
+       return 0;
+}
+
+void cxgb3i_sdev_add(struct t3cdev *cdev, struct cxgb3_client *client)
+{
+       struct cxgb3i_sdev_data *cdata;
+       struct adap_ports *ports;
+       struct ofld_page_info rx_page_info;
+       unsigned int wr_len;
+       int i;
+
+       cdata = kzalloc(sizeof *cdata, GFP_KERNEL);
+       if (!cdata)
+               return;
+       ports = kzalloc(sizeof *ports, GFP_KERNEL);
+       if (!ports)
+               goto free_ports;
+       cdata->ports = ports;
+
+       if (cdev->ctl(cdev, GET_WR_LEN, &wr_len) < 0 ||
+           cdev->ctl(cdev, GET_PORTS, cdata->ports) < 0 ||
+           cdev->ctl(cdev, GET_RX_PAGE_INFO, &rx_page_info) < 0)
+               goto free_ports;
+
+       s3_init_wr_tab(wr_len);
+
+       INIT_LIST_HEAD(&cdata->list);
+       cdata->cdev = cdev;
+       cdata->client = client;
+       cdata->rx_page_size = rx_page_info.page_size;
+       skb_queue_head_init(&cdata->deferq);
+
+       for (i = 0; i < ports->nports; i++)
+               NDEV2CDATA(ports->lldevs[i]) = cdata;
+
+       mutex_lock(&cxgb3_list_lock);
+       list_add_tail(&cdata->list, &cxgb3_list);
+       mutex_unlock(&cxgb3_list_lock);
+
+       return;
+
+free_ports:
+       kfree(ports);
+       kfree(cdata);
+}
+
+void cxgb3i_sdev_remove(struct t3cdev *cdev)
+{
+       struct cxgb3i_sdev_data *cdata = CXGB3_SDEV_DATA(cdev);
+       struct adap_ports *ports = cdata->ports;
+       int i;
+
+       for (i = 0; i < ports->nports; i++)
+               NDEV2CDATA(ports->lldevs[i]) = NULL;
+
+       mutex_lock(&cxgb3_list_lock);
+       list_del(&cdata->list);
+       mutex_unlock(&cxgb3_list_lock);
+
+       kfree(ports);
+       kfree(cdata);
+}
+
+/*
+ * Return TRUE if the specified net device is for a port on one of our
+ * registered adapters.
+ */
+static int is_cxgb3_dev(struct net_device *dev)
+{
+       struct cxgb3i_sdev_data *cdata;
+
+       mutex_lock(&cxgb3_list_lock);
+       list_for_each_entry(cdata, &cxgb3_list, list) {
+               struct adap_ports *ports = cdata->ports;
+               int i;
+
+               for (i = 0; i < ports->nports; i++)
+                       if (dev == ports->lldevs[i]) {
+                               mutex_unlock(&cxgb3_list_lock);
+                               return 1;
+                       }
+       }
+       mutex_unlock(&cxgb3_list_lock);
+       return 0;
+}
+
+/*
+ * Primary cxgb3 API operations.
+ * =============================
+ */
+
+static int s3_push_frames(struct s3_conn *, int);
+static int s3_send_reset(struct s3_conn *, int, struct sk_buff *);
+static void t3_release_offload_resources(struct s3_conn *);
+static void mk_close_req(struct s3_conn *);
+
+struct s3_conn *cxgb3i_c3cn_create(void)
+{
+       struct s3_conn *c3cn;
+
+       c3cn = kzalloc(sizeof(*c3cn), GFP_KERNEL);
+       if (c3cn == NULL)
+               return NULL;
+
+       c3cn_conn_debug("alloc c3cn 0x%p.\n", c3cn);
+
+       c3cn->flags = 0;
+       spin_lock_init(&c3cn->lock);
+       atomic_set(&c3cn->refcnt, 1);
+       skb_queue_head_init(&c3cn->receive_queue);
+       skb_queue_head_init(&c3cn->write_queue);
+       setup_timer(&c3cn->retry_timer, NULL, (unsigned long)c3cn);
+       rwlock_init(&c3cn->callback_lock);
+
+       return c3cn;
+}
+
+static inline void s3_purge_write_queue(struct s3_conn *c3cn)
+{
+       struct sk_buff *skb;
+
+       while ((skb = __skb_dequeue(&c3cn->write_queue)))
+               __kfree_skb(skb);
+}
+
+static void c3cn_done(struct s3_conn *c3cn)
+{
+       c3cn_conn_debug("c3cn 0x%p, state 0x%x, flag 0x%lx.\n",
+                        c3cn, c3cn->state, c3cn->flags);
+
+       c3cn_put_port(c3cn);
+       t3_release_offload_resources(c3cn);
+       c3cn_set_state(c3cn, C3CN_STATE_CLOSE);
+       c3cn->shutdown = C3CN_SHUTDOWN_MASK;
+       cxgb3i_conn_closing(c3cn);
+}
+
+static void c3cn_close(struct s3_conn *c3cn)
+{
+       int data_lost, old_state;
+
+       c3cn_conn_debug("c3cn 0x%p, state 0x%x, flag 0x%lx.\n",
+                        c3cn, c3cn->state, c3cn->flags);
+
+       dst_confirm(c3cn->dst_cache);
+
+       spin_lock_bh(&c3cn->lock);
+       c3cn->shutdown |= C3CN_SHUTDOWN_MASK;
+
+       /*
+        * We need to flush the receive buffs.  We do this only on the
+        * descriptor close, not protocol-sourced closes, because the
+        * reader process may not have drained the data yet!  Make a note
+        * of whether any received data will be lost so we can decide whether
+        * to FIN or RST.
+        */
+       data_lost = skb_queue_len(&c3cn->receive_queue);
+       __skb_queue_purge(&c3cn->receive_queue);
+
+       if (c3cn->state == C3CN_STATE_CLOSE)
+               /* Nothing if we are already closed */
+               c3cn_conn_debug("c3cn 0x%p, 0x%x, already closed.\n",
+                               c3cn, c3cn->state);
+       else if (data_lost || c3cn->state == C3CN_STATE_SYN_SENT) {
+               c3cn_conn_debug("c3cn 0x%p, 0x%x -> closing, send reset.\n",
+                               c3cn, c3cn->state);
+               /* Unread data was tossed, zap the connection. */
+               s3_send_reset(c3cn, CPL_ABORT_SEND_RST, NULL);
+               goto unlock;
+       } else if (c3cn->state == C3CN_STATE_ESTABLISHED) {
+               c3cn_conn_debug("c3cn 0x%p, est. -> closing, send close_req.\n",
+                               c3cn);
+               c3cn_set_state(c3cn, C3CN_STATE_CLOSING);
+               mk_close_req(c3cn);
+       }
+
+unlock:
+       old_state = c3cn->state;
+       c3cn_hold(c3cn); /* must last past the potential destroy() */
+
+       spin_unlock_bh(&c3cn->lock);
+
+       /*
+        * There are no more user references at this point.  Grab the
+        * connection lock and finish the close.
+        */
+       local_bh_disable();
+       spin_lock(&c3cn->lock);
+
+       /*
+        * Because the connection was orphaned before the spin_lock()
+        * either the backlog or a BH may have already destroyed it.
+        * Bail out if so.
+        */
+       if (old_state != C3CN_STATE_CLOSE && c3cn->state == C3CN_STATE_CLOSE)
+               goto out;
+
+       if (c3cn->state == C3CN_STATE_CLOSE)
+               s3_purge_write_queue(c3cn);
+
+out:
+       spin_unlock(&c3cn->lock);
+       local_bh_enable();
+       c3cn_put(c3cn);
+}
+
+void cxgb3i_c3cn_release(struct s3_conn *c3cn)
+{
+       c3cn_conn_debug("c3cn 0x%p, s 0x%x, f 0x%lx.\n",
+                       c3cn, c3cn->state, c3cn->flags);
+       if (likely(c3cn->state != C3CN_STATE_SYN_SENT))
+               c3cn_close(c3cn);
+       else
+               c3cn_set_flag(c3cn, C3CN_CLOSE_NEEDED);
+       c3cn_put(c3cn);
+}
+
+
+/*
+ * Local utility routines used to implement primary cxgb3 API operations.
+ * ======================================================================
+ */
+
+static u32 s3_send_rx_credits(struct s3_conn *, u32, u32, int);
+static int act_open(struct s3_conn *, struct net_device *);
+static void mk_act_open_req(struct s3_conn *, struct sk_buff *,
+                           unsigned int, const struct l2t_entry *);
+static void skb_entail(struct s3_conn *, struct sk_buff *, int);
+
+static inline void reset_wr_list(struct s3_conn *c3cn)
+{
+       c3cn->wr_pending_head = NULL;
+}
+
+/*
+ * Add a WR to a connections's list of pending WRs.  This is a singly-linked
+ * list of sk_buffs operating as a FIFO.  The head is kept in wr_pending_head
+ * and the tail in wr_pending_tail.
+ */
+static inline void enqueue_wr(struct s3_conn *c3cn,
+                             struct sk_buff *skb)
+{
+       skb->sp = NULL;
+
+       /*
+        * We want to take an extra reference since both us and the driver
+        * need to free the packet before it's really freed.  We know there's
+        * just one user currently so we use atomic_set rather than skb_get
+        * to avoid the atomic op.
+        */
+       atomic_set(&skb->users, 2);
+
+       if (!c3cn->wr_pending_head)
+               c3cn->wr_pending_head = skb;
+       else
+               c3cn->wr_pending_tail->sp = (void *)skb;
+       c3cn->wr_pending_tail = skb;
+}
+
+/*
+ * The next two functions calculate the option 0 value for a connection.
+ */
+static inline int compute_wscale(int win)
+{
+       int wscale = 0;
+       while (wscale < 14 && (65535<<wscale) < win)
+               wscale++;
+       return wscale;
+}
+
+static inline unsigned int calc_opt0h(struct s3_conn *c3cn)
+{
+       int wscale = compute_wscale(cxgb3_rcv_win);
+       return  V_KEEP_ALIVE(1) |
+               F_TCAM_BYPASS |
+               V_WND_SCALE(wscale) |
+               V_MSS_IDX(c3cn->mss_idx);
+}
+
+static inline unsigned int calc_opt0l(struct s3_conn *c3cn)
+{
+       return  V_ULP_MODE(ULP_MODE_ISCSI) |
+               V_RCV_BUFSIZ(cxgb3_rcv_win>>10);
+}
+
+static inline void make_tx_data_wr(struct s3_conn *c3cn,
+                                  struct sk_buff *skb, int len)
+{
+       struct tx_data_wr *req;
+
+       skb_reset_transport_header(skb);
+       req = (struct tx_data_wr *)__skb_push(skb, sizeof(*req));
+       req->wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_TX_DATA));
+       req->wr_lo = htonl(V_WR_TID(c3cn->tid));
+       req->sndseq = htonl(c3cn->snd_nxt);
+       /* len includes the length of any HW ULP additions */
+       req->len = htonl(len);
+       req->param = htonl(V_TX_PORT(c3cn->l2t->smt_idx));
+       /* V_TX_ULP_SUBMODE sets both the mode and submode */
+       req->flags = htonl(V_TX_ULP_SUBMODE(skb_ulp_mode(skb)) |
+                          V_TX_SHOVE((skb_peek(&c3cn->write_queue) ? 0 : 1)));
+
+       if (!c3cn_flag(c3cn, C3CN_TX_DATA_SENT)) {
+
+               req->flags |= htonl(V_TX_ACK_PAGES(2) | F_TX_INIT |
+                                   V_TX_CPU_IDX(c3cn->qset));
+
+               /* Sendbuffer is in units of 32KB.
+                */
+               req->param |= htonl(V_TX_SNDBUF(cxgb3_snd_win >> 15));
+               c3cn_set_flag(c3cn, C3CN_TX_DATA_SENT);
+       }
+}
+
+/**
+ * cxgb3_egress_dev - return the cxgb3 egress device
+ * @root_dev: the root device anchoring the search
+ * @c3cn: the connection used to determine egress port in bonding mode
+ * @context: in bonding mode, indicates a connection set up or failover
+ *
+ * Return egress device or NULL if the egress device isn't one of our ports.
+ *
+ * Given a root network device it returns the physical egress device that is a
+ * descendant of the root device.  The root device may be either a physical
+ * device, in which case it is the device returned, or a virtual device, such
+ * as a VLAN or bonding device.  In case of a bonding device the search
+ * considers the decisions of the bonding device given its mode to locate the
+ * correct egress device.
+ */
+static struct net_device *cxgb3_egress_dev(struct net_device *root_dev,
+                                          struct s3_conn *c3cn,
+                                          int context)
+{
+       while (root_dev) {
+               if (root_dev->priv_flags & IFF_802_1Q_VLAN)
+                       root_dev = vlan_dev_real_dev(root_dev);
+               else if (is_cxgb3_dev(root_dev))
+                       return root_dev;
+               else
+                       return NULL;
+       }
+       return NULL;
+}
+
+static struct rtable *find_route(__be32 saddr, __be32 daddr,
+                                __be16 sport, __be16 dport)
+{
+       struct rtable *rt;
+       struct flowi fl = {
+               .oif = 0,
+               .nl_u = {
+                        .ip4_u = {
+                                  .daddr = daddr,
+                                  .saddr = saddr,
+                                  .tos = 0 } },
+               .proto = IPPROTO_TCP,
+               .uli_u = {
+                         .ports = {
+                                   .sport = sport,
+                                   .dport = dport } } };
+
+       if (ip_route_output_flow(&init_net, &rt, &fl, NULL, 0))
+               return NULL;
+       return rt;
+}
+
+int cxgb3i_c3cn_connect(struct s3_conn *c3cn, struct sockaddr_in *usin)
+{
+       struct rtable *rt;
+       struct net_device *dev;
+       struct cxgb3i_sdev_data *cdata;
+       struct t3cdev *cdev;
+       __be32 sipv4;
+       int err;
+
+       if (usin->sin_family != AF_INET)
+               return -EAFNOSUPPORT;
+
+       /* get a source port if one hasn't been provided */
+       err = c3cn_get_port(c3cn);
+       if (err)
+               return err;
+
+       c3cn_conn_debug("c3cn 0x%p get port %u.\n",
+                       c3cn, ntohs(c3cn->saddr.sin_port));
+
+       c3cn->daddr.sin_port = usin->sin_port;
+       c3cn->daddr.sin_addr.s_addr = usin->sin_addr.s_addr;
+
+       rt = find_route(c3cn->saddr.sin_addr.s_addr,
+                       c3cn->daddr.sin_addr.s_addr,
+                       c3cn->saddr.sin_port,
+                       c3cn->daddr.sin_port);
+       if (rt == NULL) {
+               c3cn_conn_debug("NO route to 0x%x, port %u.\n",
+                               c3cn->daddr.sin_addr.s_addr,
+                               ntohs(c3cn->daddr.sin_port));
+               return -ENETUNREACH;
+       }
+
+       if (rt->rt_flags & (RTCF_MULTICAST | RTCF_BROADCAST)) {
+               c3cn_conn_debug("multi-cast route to 0x%x, port %u.\n",
+                               c3cn->daddr.sin_addr.s_addr,
+                               ntohs(c3cn->daddr.sin_port));
+               ip_rt_put(rt);
+               return -ENETUNREACH;
+       }
+
+       if (!c3cn->saddr.sin_addr.s_addr)
+               c3cn->saddr.sin_addr.s_addr = rt->rt_src;
+
+       /* now commit destination to connection */
+       c3cn->dst_cache = &rt->u.dst;
+
+       /* try to establish an offloaded connection */
+       dev = cxgb3_egress_dev(c3cn->dst_cache->dev, c3cn, 0);
+       if (dev == NULL) {
+               c3cn_conn_debug("c3cn 0x%p, egress dev NULL.\n", c3cn);
+               return -ENETUNREACH;
+       }
+       cdata = NDEV2CDATA(dev);
+       cdev = cdata->cdev;
+
+       sipv4 = cxgb3i_get_private_ipv4addr(dev);
+       if (!sipv4) {
+               c3cn_conn_debug("c3cn 0x%p, iscsi ip not configured.\n", c3cn);
+               sipv4 = c3cn->saddr.sin_addr.s_addr;
+               cxgb3i_set_private_ipv4addr(dev, sipv4);
+       } else
+               c3cn->saddr.sin_addr.s_addr = sipv4;
+
+       c3cn_conn_debug("c3cn 0x%p, %u.%u.%u.%u,%u-%u.%u.%u.%u,%u SYN_SENT.\n",
+                       c3cn, NIPQUAD(c3cn->saddr.sin_addr.s_addr),
+                       ntohs(c3cn->saddr.sin_port),
+                       NIPQUAD(c3cn->daddr.sin_addr.s_addr),
+                       ntohs(c3cn->daddr.sin_port));
+
+       c3cn_set_state(c3cn, C3CN_STATE_SYN_SENT);
+
+       if (!act_open(c3cn, dev))
+               return 0;
+
+       /*
+        * If we get here, we don't have an offload connection so simply
+        * return a failure.
+        */
+       err = -ENOTSUPP;
+
+       /*
+        * This trashes the connection and releases the local port,
+        * if necessary.
+        */
+       c3cn_conn_debug("c3cn 0x%p -> CLOSE.\n", c3cn);
+       c3cn_set_state(c3cn, C3CN_STATE_CLOSE);
+       ip_rt_put(rt);
+       c3cn_put_port(c3cn);
+       c3cn->daddr.sin_port = 0;
+       return err;
+}
+
+/*
+ * Set of states for which we should return RX credits.
+ */
+#define CREDIT_RETURN_STATE (C3CN_STATE_ESTABLISHED)
+
+/*
+ * Called after some received data has been read.  It returns RX credits
+ * to the HW for the amount of data processed.
+ */
+void cxgb3i_c3cn_rx_credits(struct s3_conn *c3cn, int copied)
+{
+       struct t3cdev *cdev;
+       int must_send;
+       u32 credits, dack = 0;
+
+       if (!c3cn_in_state(c3cn, CREDIT_RETURN_STATE))
+               return;
+
+       credits = c3cn->copied_seq - c3cn->rcv_wup;
+       if (unlikely(!credits))
+               return;
+
+       cdev = c3cn->cdev;
+
+       if (unlikely(cxgb3_rx_credit_thres == 0))
+               return;
+
+       dack = F_RX_DACK_CHANGE | V_RX_DACK_MODE(1);
+
+       /*
+        * For coalescing to work effectively ensure the receive window has
+        * at least 16KB left.
+        */
+       must_send = credits + 16384 >= cxgb3_rcv_win;
+
+       if (must_send || credits >= cxgb3_rx_credit_thres)
+               c3cn->rcv_wup += s3_send_rx_credits(c3cn, credits, dack,
+                                                   must_send);
+}
+
+/*
+ * Generic ARP failure handler that discards the buffer.
+ */
+static void arp_failure_discard(struct t3cdev *cdev, struct sk_buff *skb)
+{
+       kfree_skb(skb);
+}
+
+/*
+ * Prepends TX_DATA_WR or CPL_CLOSE_CON_REQ headers to buffers waiting in a
+ * connection's send queue and sends them on to T3.  Must be called with the
+ * connection's lock held.  Returns the amount of send buffer space that was
+ * freed as a result of sending queued data to T3.
+ */
+static int s3_push_frames(struct s3_conn *c3cn, int req_completion)
+{
+       int total_size = 0;
+       struct sk_buff *skb;
+       struct t3cdev *cdev;
+       struct cxgb3i_sdev_data *cdata;
+
+       if (unlikely(c3cn_in_state(c3cn,
+                                  C3CN_STATE_SYN_SENT | C3CN_STATE_CLOSE)))
+               return 0;
+
+       /*
+        * We shouldn't really be called at all after an abort but check just
+        * in case.
+        */
+       if (unlikely(c3cn_flag(c3cn, C3CN_ABORT_SHUTDOWN)))
+               return 0;
+
+       cdev = c3cn->cdev;
+       cdata = CXGB3_SDEV_DATA(cdev);
+
+       while (c3cn->wr_avail
+              && (skb = skb_peek(&c3cn->write_queue)) != NULL
+              && !c3cn_flag(c3cn, C3CN_TX_WAIT_IDLE)) {
+
+               int len = skb->len;     /* length before skb_push */
+               int frags = skb_shinfo(skb)->nr_frags + (len != skb->data_len);
+               int wrs_needed = skb_wrs[frags];
+
+               if (wrs_needed > 1 && len + sizeof(struct tx_data_wr) <= wrlen)
+                       wrs_needed = 1;
+
+               WARN_ON(frags >= ARRAY_SIZE(skb_wrs) || wrs_needed < 1);
+
+               if (c3cn->wr_avail < wrs_needed)
+                       break;
+
+               __skb_unlink(skb, &c3cn->write_queue);
+               skb->priority = CPL_PRIORITY_DATA;
+               skb->csum = wrs_needed; /* remember this until the WR_ACK */
+               c3cn->wr_avail -= wrs_needed;
+               c3cn->wr_unacked += wrs_needed;
+               enqueue_wr(c3cn, skb);
+
+               if (likely(CXGB3_SKB_CB(skb)->flags & C3CB_FLAG_NEED_HDR)) {
+                       len += ulp_extra_len(skb);
+                       make_tx_data_wr(c3cn, skb, len);
+                       c3cn->snd_nxt += len;
+                       if ((req_completion
+                            && c3cn->wr_unacked == wrs_needed)
+                           || (CXGB3_SKB_CB(skb)->flags & C3CB_FLAG_COMPL)
+                           || c3cn->wr_unacked >= c3cn->wr_max / 2) {
+                               struct work_request_hdr *wr = cplhdr(skb);
+
+                               wr->wr_hi |= htonl(F_WR_COMPL);
+                               c3cn->wr_unacked = 0;
+                       }
+                       CXGB3_SKB_CB(skb)->flags &= ~C3CB_FLAG_NEED_HDR;
+               } else if (skb->data[0] == FW_WROPCODE_OFLD_CLOSE_CON)
+                       c3cn_set_flag(c3cn, C3CN_CLOSE_CON_REQUESTED);
+
+               total_size += skb->truesize;
+               set_arp_failure_handler(skb, arp_failure_discard);
+               l2t_send(cdev, skb, c3cn->l2t);
+       }
+       return total_size;
+}
+
+/*
+ * Handle an ARP failure for a CPL_ABORT_REQ.  Change it into a no RST variant
+ * and send it along.
+ */
+static void abort_arp_failure(struct t3cdev *cdev, struct sk_buff *skb)
+{
+       struct cpl_abort_req *req = cplhdr(skb);
+
+       c3cn_conn_debug("tdev 0x%p.\n", cdev);
+
+       req->cmd = CPL_ABORT_NO_RST;
+       cxgb3_ofld_send(cdev, skb);
+}
+
+/*
+ * Send an ABORT_REQ message.  Cannot fail.  This routine makes sure we do
+ * not send multiple ABORT_REQs for the same connection and also that we do
+ * not try to send a message after the connection has closed.  Returns 1 if
+ * an ABORT_REQ wasn't generated after all, 0 otherwise.
+ */
+static int s3_send_reset(struct s3_conn *c3cn, int mode,
+                        struct sk_buff *skb)
+{
+       struct cpl_abort_req *req;
+       unsigned int tid = c3cn->tid;
+
+       if (unlikely(c3cn_flag(c3cn, C3CN_ABORT_SHUTDOWN) || !c3cn->cdev)) {
+               if (skb)
+                       __kfree_skb(skb);
+               return 1;
+       }
+
+       c3cn_conn_debug("c3cn 0x%p, mode %d, flag ABORT_RPL + ABORT_SHUT.\n",
+                       c3cn, mode);
+
+       c3cn_set_flag(c3cn, C3CN_ABORT_RPL_PENDING);
+       c3cn_set_flag(c3cn, C3CN_ABORT_SHUTDOWN);
+
+       /* Purge the send queue so we don't send anything after an abort. */
+       s3_purge_write_queue(c3cn);
+
+       if (!skb)
+               skb = alloc_skb(sizeof(*req), GFP_KERNEL | __GFP_NOFAIL);
+       skb->priority = CPL_PRIORITY_DATA;
+       set_arp_failure_handler(skb, abort_arp_failure);
+
+       req = (struct cpl_abort_req *)skb_put(skb, sizeof(*req));
+       req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_HOST_ABORT_CON_REQ));
+       req->wr.wr_lo = htonl(V_WR_TID(tid));
+       OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_ABORT_REQ, tid));
+       req->rsvd0 = htonl(c3cn->snd_nxt);
+       req->rsvd1 = !c3cn_flag(c3cn, C3CN_TX_DATA_SENT);
+       req->cmd = mode;
+
+       l2t_send(c3cn->cdev, skb, c3cn->l2t);
+       return 0;
+}
+
+/*
+ * Add a list of skbs to a connection send queue.  This interface is intended
+ * for use by in-kernel ULPs.  The skbs must comply with the max size limit of
+ * the device and have a headroom of at least TX_HEADER_LEN bytes.
+ */
+int cxgb3i_c3cn_send_pdus(struct s3_conn *c3cn, struct sk_buff *skb, int flags)
+{
+       struct sk_buff *next;
+       int err, copied = 0;
+
+       spin_lock_bh(&c3cn->lock);
+
+       if (!c3cn_in_state(c3cn, C3CN_STATE_ESTABLISHED)) {
+               err = -EAGAIN;
+               goto out_err;
+       }
+
+       err = -EPIPE;
+       if (c3cn->err || (c3cn->shutdown & C3CN_SEND_SHUTDOWN))
+               goto out_err;
+
+       while (skb) {
+               if (unlikely(skb_headroom(skb) < TX_HEADER_LEN)) {
+                       c3cn_tx_debug("c3cn 0x%p, skb head.\n", c3cn);
+                       err = -EINVAL;
+                       goto out_err;
+               }
+
+               next = skb->next;
+               skb->next = NULL;
+               skb_entail(c3cn, skb, C3CB_FLAG_NO_APPEND | C3CB_FLAG_NEED_HDR);
+               copied += skb->len;
+               c3cn->write_seq += skb->len + ulp_extra_len(skb);
+               skb = next;
+       }
+done:
+       if (likely(skb_queue_len(&c3cn->write_queue)))
+               s3_push_frames(c3cn, 1);
+       spin_unlock_bh(&c3cn->lock);
+       return copied;
+
+out_err:
+       if (copied == 0 && err == -EPIPE)
+               copied = c3cn->err ? c3cn->err : -EPIPE;
+       goto done;
+}
+
+/*
+ * Low-level utility routines for primary API functions.
+ * =====================================================
+ */
+/* routines to implement CPL message processing */
+static void c3cn_act_establish(struct s3_conn *, struct sk_buff *);
+static void active_open_failed(struct s3_conn *, struct sk_buff *);
+static void wr_ack(struct s3_conn *, struct sk_buff *);
+static void do_peer_fin(struct s3_conn *, struct sk_buff *);
+static void process_abort_req(struct s3_conn *, struct sk_buff *);
+static void process_abort_rpl(struct s3_conn *, struct sk_buff *);
+static void process_close_con_rpl(struct s3_conn *, struct sk_buff *);
+static void process_rx_iscsi_hdr(struct s3_conn *, struct sk_buff *);
+
+static struct sk_buff *__get_cpl_reply_skb(struct sk_buff *, size_t, gfp_t);
+
+static void fail_act_open(struct s3_conn *, int);
+static void init_offload_conn(struct s3_conn *, struct t3cdev *,
+                             struct dst_entry *);
+
+/*
+ * Insert a connection into the TID table and take an extra reference.
+ */
+static inline void c3cn_insert_tid(struct cxgb3i_sdev_data *cdata,
+                                  struct s3_conn *c3cn,
+                                  unsigned int tid)
+{
+       c3cn_hold(c3cn);
+       cxgb3_insert_tid(cdata->cdev, cdata->client, c3cn, tid);
+}
+
+static inline void free_atid(struct t3cdev *cdev, unsigned int tid)
+{
+       struct s3_conn *c3cn = cxgb3_free_atid(cdev, tid);
+       if (c3cn)
+               c3cn_put(c3cn);
+}
+
+/*
+ * This function is intended for allocations of small control messages.
+ * Such messages go as immediate data and usually the pakets are freed
+ * immediately.  We maintain a cache of one small sk_buff and use it whenever
+ * it is available (has a user count of 1).  Otherwise we get a fresh buffer.
+ */
+#define CTRL_SKB_LEN 120
+
+static struct sk_buff *alloc_ctrl_skb(const struct s3_conn *c3cn,
+                                     int len)
+{
+       struct sk_buff *skb = c3cn->ctrl_skb_cache;
+
+       if (likely(skb && !skb_shared(skb) && !skb_cloned(skb))) {
+               __skb_trim(skb, 0);
+               atomic_set(&skb->users, 2);
+       } else if (likely(!in_atomic()))
+               skb = alloc_skb(len, GFP_ATOMIC | __GFP_NOFAIL);
+       else
+               skb = alloc_skb(len, GFP_ATOMIC);
+       return skb;
+}
+
+/*
+ * Handle an ARP failure for an active open.
+ */
+static void act_open_req_arp_failure(struct t3cdev *dev, struct sk_buff *skb)
+{
+       struct s3_conn *c3cn = (struct s3_conn *)skb->sk;
+
+       c3cn_conn_debug("c3cn 0x%p, state 0x%x.\n", c3cn, c3cn->state);
+
+       c3cn_hold(c3cn);
+       spin_lock(&c3cn->lock);
+       if (c3cn->state == C3CN_STATE_SYN_SENT) {
+               fail_act_open(c3cn, EHOSTUNREACH);
+               __kfree_skb(skb);
+       }
+       spin_unlock(&c3cn->lock);
+       c3cn_put(c3cn);
+}
+
+/*
+ * Send an active open request.
+ */
+static int act_open(struct s3_conn *c3cn, struct net_device *dev)
+{
+       struct cxgb3i_sdev_data *cdata = NDEV2CDATA(dev);
+       struct t3cdev *cdev = cdata->cdev;
+       struct dst_entry *dst = c3cn->dst_cache;
+       struct sk_buff *skb;
+
+       c3cn_conn_debug("c3cn 0x%p, state 0x%x, flag 0x%lx.\n",
+                       c3cn, c3cn->state, c3cn->flags);
+       /*
+        * Initialize connection data.  Note that the flags and ULP mode are
+        * initialized higher up ...
+        */
+       c3cn->dev = dev;
+       c3cn->cdev = cdev;
+       c3cn->tid = cxgb3_alloc_atid(cdev, cdata->client, c3cn);
+       if (c3cn->tid < 0)
+               goto out_err;
+
+       c3cn->qset = 0;
+       c3cn->l2t = t3_l2t_get(cdev, dst->neighbour, dev);
+       if (!c3cn->l2t)
+               goto free_tid;
+
+       skb = alloc_skb(sizeof(struct cpl_act_open_req), GFP_KERNEL);
+       if (!skb)
+               goto free_l2t;
+
+       skb->sk = (struct sock *)c3cn;
+       set_arp_failure_handler(skb, act_open_req_arp_failure);
+
+       c3cn_hold(c3cn);
+
+       init_offload_conn(c3cn, cdev, dst);
+       c3cn->err = 0;
+       c3cn_reset_flag(c3cn, C3CN_DONE);
+
+       mk_act_open_req(c3cn, skb, c3cn->tid, c3cn->l2t);
+       l2t_send(cdev, skb, c3cn->l2t);
+       return 0;
+
+free_l2t:
+       l2t_release(L2DATA(cdev), c3cn->l2t);
+free_tid:
+       free_atid(cdev, c3cn->tid);
+       c3cn->tid = 0;
+out_err:
+       return -1;
+}
+
+/*
+ * Close a connection by sending a CPL_CLOSE_CON_REQ message.  Cannot fail
+ * under any circumstances.  We take the easy way out and always queue the
+ * message to the write_queue.  We can optimize the case where the queue is
+ * already empty though the optimization is probably not worth it.
+ */
+static void mk_close_req(struct s3_conn *c3cn)
+{
+       struct sk_buff *skb;
+       struct cpl_close_con_req *req;
+       unsigned int tid = c3cn->tid;
+
+       c3cn_conn_debug("c3cn 0x%p, state 0x%x, flag 0x%lx.\n",
+                       c3cn, c3cn->state, c3cn->flags);
+
+       skb = alloc_skb(sizeof(struct cpl_close_con_req),
+                       GFP_KERNEL | __GFP_NOFAIL);
+       req = (struct cpl_close_con_req *)__skb_put(skb, sizeof(*req));
+       req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_CLOSE_CON));
+       req->wr.wr_lo = htonl(V_WR_TID(tid));
+       OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_CLOSE_CON_REQ, tid));
+       req->rsvd = htonl(c3cn->write_seq);
+
+       skb_entail(c3cn, skb, C3CB_FLAG_NO_APPEND);
+       if (c3cn->state != C3CN_STATE_SYN_SENT)
+               s3_push_frames(c3cn, 1);
+}
+
+static void skb_entail(struct s3_conn *c3cn, struct sk_buff *skb,
+                      int flags)
+{
+       CXGB3_SKB_CB(skb)->seq = c3cn->write_seq;
+       CXGB3_SKB_CB(skb)->flags = flags;
+       __skb_queue_tail(&c3cn->write_queue, skb);
+}
+
+/*
+ * Send RX credits through an RX_DATA_ACK CPL message.  If nofail is 0 we are
+ * permitted to return without sending the message in case we cannot allocate
+ * an sk_buff.  Returns the number of credits sent.
+ */
+static u32 s3_send_rx_credits(struct s3_conn *c3cn, u32 credits, u32 dack,
+                             int nofail)
+{
+       struct sk_buff *skb;
+       struct cpl_rx_data_ack *req;
+
+       skb = (nofail ? alloc_ctrl_skb(c3cn, sizeof(*req))
+              : alloc_skb(sizeof(*req), GFP_ATOMIC));
+       if (!skb)
+               return 0;
+
+       req = (struct cpl_rx_data_ack *)__skb_put(skb, sizeof(*req));
+       req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
+       OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_RX_DATA_ACK, c3cn->tid));
+       req->credit_dack = htonl(dack | V_RX_CREDITS(credits));
+       skb->priority = CPL_PRIORITY_ACK;
+       cxgb3_ofld_send(c3cn->cdev, skb);
+       return credits;
+}
+
+static void mk_act_open_req(struct s3_conn *c3cn, struct sk_buff *skb,
+                           unsigned int atid, const struct l2t_entry *e)
+{
+       struct cpl_act_open_req *req;
+
+       c3cn_conn_debug("c3cn 0x%p, atid 0x%x.\n", c3cn, atid);
+
+       skb->priority = CPL_PRIORITY_SETUP;
+       req = (struct cpl_act_open_req *)__skb_put(skb, sizeof(*req));
+       req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
+       OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_ACT_OPEN_REQ, atid));
+       req->local_port = c3cn->saddr.sin_port;
+       req->peer_port = c3cn->daddr.sin_port;
+       req->local_ip = c3cn->saddr.sin_addr.s_addr;
+       req->peer_ip = c3cn->daddr.sin_addr.s_addr;
+       req->opt0h = htonl(calc_opt0h(c3cn) | V_L2T_IDX(e->idx) |
+                          V_TX_CHANNEL(e->smt_idx));
+       req->opt0l = htonl(calc_opt0l(c3cn));
+       req->params = 0;
+}
+
+/*
+ * Definitions and declarations for CPL handler functions.
+ * =======================================================
+ */
+
+/*
+ * Similar to process_cpl_msg() but takes an extra connection reference around
+ * the call to the handler.  Should be used if the handler may drop a
+ * connection reference.
+ */
+static inline void process_cpl_msg_ref(void (*fn) (struct s3_conn *,
+                                                  struct sk_buff *),
+                                      struct s3_conn *c3cn,
+                                      struct sk_buff *skb)
+{
+       c3cn_hold(c3cn);
+       process_cpl_msg(fn, c3cn, skb);
+       c3cn_put(c3cn);
+}
+
+/*
+ * Return whether a failed active open has allocated a TID
+ */
+static inline int act_open_has_tid(int status)
+{
+       return status != CPL_ERR_TCAM_FULL && status != CPL_ERR_CONN_EXIST &&
+           status != CPL_ERR_ARP_MISS;
+}
+
+/*
+ * Returns true if a connection cannot accept new Rx data.
+ */
+static inline int c3cn_no_receive(const struct s3_conn *c3cn)
+{
+       return c3cn->shutdown & C3CN_RCV_SHUTDOWN;
+}
+
+/*
+ * A helper function that aborts a connection and increments the given MIB
+ * counter.  The supplied skb is used to generate the ABORT_REQ message if
+ * possible.  Must be called with softirqs disabled.
+ */
+static inline void abort_conn(struct s3_conn *c3cn,
+                             struct sk_buff *skb)
+{
+       struct sk_buff *abort_skb;
+
+       c3cn_conn_debug("c3cn 0x%p, state 0x%x, flag 0x%lx.\n",
+                       c3cn, c3cn->state, c3cn->flags);
+
+       abort_skb = __get_cpl_reply_skb(skb, sizeof(struct cpl_abort_req),
+                                       GFP_ATOMIC);
+       if (abort_skb)
+               s3_send_reset(c3cn, CPL_ABORT_SEND_RST, abort_skb);
+}
+
+/*
+ * Returns whether an ABORT_REQ_RSS message is a negative advice.
+ */
+static inline int is_neg_adv_abort(unsigned int status)
+{
+       return  status == CPL_ERR_RTX_NEG_ADVICE ||
+               status == CPL_ERR_PERSIST_NEG_ADVICE;
+}
+
+/*
+ * CPL handler functions.
+ * ======================
+ */
+
+/*
+ * Process a CPL_ACT_ESTABLISH message.
+ */
+static int do_act_establish(struct t3cdev *cdev, struct sk_buff *skb,
+                           void *ctx)
+{
+       struct cpl_act_establish *req = cplhdr(skb);
+       unsigned int tid = GET_TID(req);
+       unsigned int atid = G_PASS_OPEN_TID(ntohl(req->tos_tid));
+       struct s3_conn *c3cn = ctx;
+       struct cxgb3i_sdev_data *cdata = CXGB3_SDEV_DATA(cdev);
+
+       c3cn_conn_debug("rcv, tid 0x%x, c3cn 0x%p, 0x%x, 0x%lx.\n",
+                       tid, c3cn, c3cn->state, c3cn->flags);
+       /*
+        * It's OK if the TID is currently in use, the owning connection may
+        * have backlogged its last CPL message(s).  Just take it away.
+        */
+       c3cn->tid = tid;
+       c3cn_insert_tid(cdata, c3cn, tid);
+       free_atid(cdev, atid);
+
+       c3cn->qset = G_QNUM(ntohl(skb->csum));
+
+       process_cpl_msg(c3cn_act_establish, c3cn, skb);
+       return 0;
+}
+
+/*
+ * Process an ACT_OPEN_RPL CPL message.
+ */
+static int do_act_open_rpl(struct t3cdev *cdev, struct sk_buff *skb, void *ctx)
+{
+       struct s3_conn *c3cn = ctx;
+       struct cpl_act_open_rpl *rpl = cplhdr(skb);
+
+       c3cn_conn_debug("rcv, status 0x%x, c3cn 0x%p, 0x%x, 0x%lx.\n",
+                       rpl->status, c3cn, c3cn->state, c3cn->flags);
+
+       if (act_open_has_tid(rpl->status))
+               cxgb3_queue_tid_release(cdev, GET_TID(rpl));
+
+       process_cpl_msg_ref(active_open_failed, c3cn, skb);
+       return 0;
+}
+
+/*
+ * Handler RX_ISCSI_HDR CPL messages.
+ */
+static int do_iscsi_hdr(struct t3cdev *t3dev, struct sk_buff *skb, void *ctx)
+{
+       struct s3_conn *c3cn = ctx;
+       process_cpl_msg(process_rx_iscsi_hdr, c3cn, skb);
+       return 0;
+}
+
+/*
+ * Handler for TX_DATA_ACK CPL messages.
+ */
+static int do_wr_ack(struct t3cdev *cdev, struct sk_buff *skb, void *ctx)
+{
+       struct s3_conn *c3cn = ctx;
+
+       process_cpl_msg(wr_ack, c3cn, skb);
+       return 0;
+}
+
+/*
+ * Handler for PEER_CLOSE CPL messages.
+ */
+static int do_peer_close(struct t3cdev *cdev, struct sk_buff *skb, void *ctx)
+{
+       struct s3_conn *c3cn = ctx;
+
+       c3cn_conn_debug("rcv, c3cn 0x%p, 0x%x, 0x%lx.\n",
+                       c3cn, c3cn->state, c3cn->flags);
+       process_cpl_msg_ref(do_peer_fin, c3cn, skb);
+       return 0;
+}
+
+/*
+ * Handle an ABORT_REQ_RSS CPL message.
+ */
+static int do_abort_req(struct t3cdev *cdev, struct sk_buff *skb, void *ctx)
+{
+       const struct cpl_abort_req_rss *req = cplhdr(skb);
+       struct s3_conn *c3cn = ctx;
+
+       c3cn_conn_debug("rcv, c3cn 0x%p, 0x%x, 0x%lx.\n",
+                       c3cn, c3cn->state, c3cn->flags);
+
+       if (is_neg_adv_abort(req->status)) {
+               __kfree_skb(skb);
+               return 0;
+       }
+
+       process_cpl_msg_ref(process_abort_req, c3cn, skb);
+       return 0;
+}
+
+/*
+ * Handle an ABORT_RPL_RSS CPL message.
+ */
+static int do_abort_rpl(struct t3cdev *cdev, struct sk_buff *skb, void *ctx)
+{
+       struct cpl_abort_rpl_rss *rpl = cplhdr(skb);
+       struct s3_conn *c3cn = ctx;
+
+       c3cn_conn_debug("rcv, status 0x%x, c3cn 0x%p, 0x%x, 0x%lx.\n",
+                       rpl->status, c3cn, c3cn ? c3cn->state : 0,
+                       c3cn ? c3cn->flags : 0UL);
+
+       /*
+        * Ignore replies to post-close aborts indicating that the abort was
+        * requested too late.  These connections are terminated when we get
+        * PEER_CLOSE or CLOSE_CON_RPL and by the time the abort_rpl_rss
+        * arrives the TID is either no longer used or it has been recycled.
+        */
+       if (rpl->status == CPL_ERR_ABORT_FAILED)
+               goto discard;
+
+       /*
+        * Sometimes we've already closed the connection, e.g., a post-close
+        * abort races with ABORT_REQ_RSS, the latter frees the connection
+        * expecting the ABORT_REQ will fail with CPL_ERR_ABORT_FAILED,
+        * but FW turns the ABORT_REQ into a regular one and so we get
+        * ABORT_RPL_RSS with status 0 and no connection.  Only on T3A.
+        */
+       if (!c3cn)
+               goto discard;
+
+       process_cpl_msg_ref(process_abort_rpl, c3cn, skb);
+       return 0;
+
+discard:
+       __kfree_skb(skb);
+       return 0;
+}
+
+/*
+ * Handler for CLOSE_CON_RPL CPL messages.
+ */
+static int do_close_con_rpl(struct t3cdev *cdev, struct sk_buff *skb,
+                           void *ctx)
+{
+       struct s3_conn *c3cn = ctx;
+
+       c3cn_conn_debug("rcv, c3cn 0x%p, 0x%x, 0x%lx.\n",
+                        c3cn, c3cn->state, c3cn->flags);
+
+       process_cpl_msg_ref(process_close_con_rpl, c3cn, skb);
+       return 0;
+}
+
+/*
+ * Definitions and declarations for CPL message processing.
+ * ========================================================
+ */
+
+static void make_established(struct s3_conn *, u32, unsigned int);
+static void act_open_retry_timer(unsigned long);
+static void mk_act_open_req(struct s3_conn *, struct sk_buff *,
+                           unsigned int, const struct l2t_entry *);
+static int act_open_rpl_status_to_errno(int);
+static void handle_excess_rx(struct s3_conn *, struct sk_buff *);
+static int abort_status_to_errno(struct s3_conn *, int, int *);
+static void send_abort_rpl(struct sk_buff *, struct t3cdev *, int);
+static struct sk_buff *get_cpl_reply_skb(struct sk_buff *, size_t, gfp_t);
+
+/*
+ * Dequeue and return the first unacknowledged's WR on a connections's pending
+ * list.
+ */
+static inline struct sk_buff *dequeue_wr(struct s3_conn *c3cn)
+{
+       struct sk_buff *skb = c3cn->wr_pending_head;
+
+       if (likely(skb)) {
+               /* Don't bother clearing the tail */
+               c3cn->wr_pending_head = (struct sk_buff *)skb->sp;
+               skb->sp = NULL;
+       }
+       return skb;
+}
+
+/*
+ * Return the first pending WR without removing it from the list.
+ */
+static inline struct sk_buff *peek_wr(const struct s3_conn *c3cn)
+{
+       return c3cn->wr_pending_head;
+}
+
+static inline void free_wr_skb(struct sk_buff *skb)
+{
+       kfree_skb(skb);
+}
+
+static void purge_wr_queue(struct s3_conn *c3cn)
+{
+       struct sk_buff *skb;
+       while ((skb = dequeue_wr(c3cn)) != NULL)
+               free_wr_skb(skb);
+}
+
+static inline void set_abort_rpl_wr(struct sk_buff *skb, unsigned int tid,
+                                   int cmd)
+{
+       struct cpl_abort_rpl *rpl = cplhdr(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;
+}
+
+/*
+ * CPL message processing ...
+ * ==========================
+ */
+
+/*
+ * Updates connection state from an active establish CPL message.  Runs with
+ * the connection lock held.
+ */
+static void c3cn_act_establish(struct s3_conn *c3cn,
+                              struct sk_buff *skb)
+{
+       struct cpl_act_establish *req = cplhdr(skb);
+       u32 rcv_isn = ntohl(req->rcv_isn);      /* real RCV_ISN + 1 */
+
+       c3cn_conn_debug("c3cn 0x%p, state 0x%x, flag 0x%lx.\n",
+                       c3cn, c3cn->state, c3cn->flags);
+
+       if (unlikely(c3cn->state != C3CN_STATE_SYN_SENT))
+               printk(KERN_ERR "TID %u expected SYN_SENT, found %d\n",
+                      c3cn->tid, c3cn->state);
+
+       c3cn->copied_seq = c3cn->rcv_wup = c3cn->rcv_nxt = rcv_isn;
+       make_established(c3cn, ntohl(req->snd_isn), ntohs(req->tcp_opt));
+
+       if (unlikely(c3cn_flag(c3cn, C3CN_CLOSE_NEEDED))) {
+               /* upper layer has requested closing */
+               abort_conn(c3cn, skb);
+               return;
+       }
+
+       __kfree_skb(skb);
+       if (s3_push_frames(c3cn, 1))
+               cxgb3i_conn_tx_open(c3cn);
+}
+
+/*
+ * Handle active open failures.
+ */
+static void active_open_failed(struct s3_conn *c3cn,
+                              struct sk_buff *skb)
+{
+       struct cpl_act_open_rpl *rpl = cplhdr(skb);
+
+       c3cn_conn_debug("c3cn 0x%p, state 0x%x, flag 0x%lx.\n",
+                       c3cn, c3cn->state, c3cn->flags);
+
+       if (rpl->status == CPL_ERR_CONN_EXIST &&
+           c3cn->retry_timer.function != act_open_retry_timer) {
+               c3cn->retry_timer.function = act_open_retry_timer;
+               c3cn_reset_timer(c3cn, &c3cn->retry_timer,
+                                jiffies + HZ / 2);
+       } else
+               fail_act_open(c3cn, act_open_rpl_status_to_errno(rpl->status));
+       __kfree_skb(skb);
+}
+
+/*
+ * Process received pdu for a connection.
+ */
+static void process_rx_iscsi_hdr(struct s3_conn *c3cn,
+                                struct sk_buff *skb)
+{
+       struct cpl_iscsi_hdr *hdr_cpl = cplhdr(skb);
+       struct cpl_iscsi_hdr_norss data_cpl;
+       struct cpl_rx_data_ddp_norss ddp_cpl;
+       unsigned int hdr_len, data_len, status;
+       unsigned int len;
+       int err;
+
+       if (unlikely(c3cn_no_receive(c3cn))) {
+               handle_excess_rx(c3cn, skb);
+               return;
+       }
+
+       CXGB3_SKB_CB(skb)->seq = ntohl(hdr_cpl->seq);
+       CXGB3_SKB_CB(skb)->flags = 0;
+
+       skb_reset_transport_header(skb);
+       __skb_pull(skb, sizeof(struct cpl_iscsi_hdr));
+
+       len = hdr_len = ntohs(hdr_cpl->len);
+       /* msg coalesce is off or not enough data received */
+       if (skb->len <= hdr_len) {
+               printk(KERN_ERR "%s: TID %u, ISCSI_HDR, skb len %u < %u.\n",
+                      c3cn->cdev->name, c3cn->tid, skb->len, hdr_len);
+               goto abort_conn;
+       }
+
+       err = skb_copy_bits(skb, skb->len - sizeof(ddp_cpl), &ddp_cpl,
+                           sizeof(ddp_cpl));
+       if (err < 0)
+               goto abort_conn;
+
+       skb_ulp_mode(skb) = ULP2_FLAG_DATA_READY;
+       skb_ulp_pdulen(skb) = ntohs(ddp_cpl.len);
+       skb_ulp_ddigest(skb) = ntohl(ddp_cpl.ulp_crc);
+       status = ntohl(ddp_cpl.ddp_status);
+
+       if (status & (1 << RX_DDP_STATUS_HCRC_SHIFT))
+               skb_ulp_mode(skb) |= ULP2_FLAG_HCRC_ERROR;
+       if (status & (1 << RX_DDP_STATUS_DCRC_SHIFT))
+               skb_ulp_mode(skb) |= ULP2_FLAG_DCRC_ERROR;
+       if (status & (1 << RX_DDP_STATUS_PAD_SHIFT))
+               skb_ulp_mode(skb) |= ULP2_FLAG_PAD_ERROR;
+
+       if (skb->len > (hdr_len + sizeof(ddp_cpl))) {
+               err = skb_copy_bits(skb, hdr_len, &data_cpl, sizeof(data_cpl));
+               if (err < 0)
+                       goto abort_conn;
+               data_len = ntohs(data_cpl.len);
+               len += sizeof(data_cpl) + data_len;
+       } else if (status & (1 << RX_DDP_STATUS_DDP_SHIFT))
+               skb_ulp_mode(skb) |= ULP2_FLAG_DATA_DDPED;
+
+       c3cn->rcv_nxt = ntohl(ddp_cpl.seq) + skb_ulp_pdulen(skb);
+       __pskb_trim(skb, len);
+       __skb_queue_tail(&c3cn->receive_queue, skb);
+       cxgb3i_conn_pdu_ready(c3cn);
+
+       return;
+
+abort_conn:
+       s3_send_reset(c3cn, CPL_ABORT_SEND_RST, NULL);
+       __kfree_skb(skb);
+}
+
+/*
+ * Process an acknowledgment of WR completion.  Advance snd_una and send the
+ * next batch of work requests from the write queue.
+ */
+static void wr_ack(struct s3_conn *c3cn, struct sk_buff *skb)
+{
+       struct cpl_wr_ack *hdr = cplhdr(skb);
+       unsigned int credits = ntohs(hdr->credits);
+       u32 snd_una = ntohl(hdr->snd_una);
+
+       c3cn->wr_avail += credits;
+       if (c3cn->wr_unacked > c3cn->wr_max - c3cn->wr_avail)
+               c3cn->wr_unacked = c3cn->wr_max - c3cn->wr_avail;
+
+       while (credits) {
+               struct sk_buff *p = peek_wr(c3cn);
+
+               if (unlikely(!p)) {
+                       printk(KERN_ERR "%u WR_ACK credits for TID %u with "
+                              "nothing pending, state %u\n",
+                              credits, c3cn->tid, c3cn->state);
+                       break;
+               }
+               if (unlikely(credits < p->csum)) {
+                       p->csum -= credits;
+                       break;
+               } else {
+                       dequeue_wr(c3cn);
+                       credits -= p->csum;
+                       free_wr_skb(p);
+               }
+       }
+
+       if (unlikely(before(snd_una, c3cn->snd_una)))
+               goto out_free;
+
+       if (c3cn->snd_una != snd_una) {
+               c3cn->snd_una = snd_una;
+               dst_confirm(c3cn->dst_cache);
+               if (c3cn->snd_una == c3cn->snd_nxt)
+                       c3cn_reset_flag(c3cn, C3CN_TX_WAIT_IDLE);
+       }
+
+       if (skb_queue_len(&c3cn->write_queue) && s3_push_frames(c3cn, 0))
+               cxgb3i_conn_tx_open(c3cn);
+out_free:
+       __kfree_skb(skb);
+}
+
+/*
+ * Handle a peer FIN.
+ */
+static void do_peer_fin(struct s3_conn *c3cn, struct sk_buff *skb)
+{
+       int keep = 0;
+
+       c3cn_conn_debug("c3cn 0x%p, state 0x%x, flag 0x%lx.\n",
+                       c3cn, c3cn->state, c3cn->flags);
+
+       if (c3cn_flag(c3cn, C3CN_ABORT_RPL_PENDING))
+               goto out;
+
+       c3cn->shutdown |= C3CN_RCV_SHUTDOWN;
+       c3cn_set_flag(c3cn, C3CN_DONE);
+
+       switch (c3cn->state) {
+       case C3CN_STATE_ESTABLISHED:
+               break;
+       case C3CN_STATE_CLOSING:
+               c3cn_done(c3cn);
+               break;
+       default:
+               printk(KERN_ERR
+                      "%s: TID %u received PEER_CLOSE in bad state %d\n",
+                      c3cn->cdev->name, c3cn->tid, c3cn->state);
+       }
+
+       cxgb3i_conn_closing(c3cn);
+out:
+       if (!keep)
+               __kfree_skb(skb);
+}
+
+/*
+ * Process abort requests.  If we are waiting for an ABORT_RPL we ignore this
+ * request except that we need to reply to it.
+ */
+static void process_abort_req(struct s3_conn *c3cn,
+                             struct sk_buff *skb)
+{
+       int rst_status = CPL_ABORT_NO_RST;
+       const struct cpl_abort_req_rss *req = cplhdr(skb);
+
+       c3cn_conn_debug("c3cn 0x%p, state 0x%x, flag 0x%lx.\n",
+                       c3cn, c3cn->state, c3cn->flags);
+
+       if (!c3cn_flag(c3cn, C3CN_ABORT_REQ_RCVD)) {
+               c3cn_set_flag(c3cn, C3CN_ABORT_REQ_RCVD);
+               c3cn_set_flag(c3cn, C3CN_ABORT_SHUTDOWN);
+               __kfree_skb(skb);
+               return;
+       }
+       c3cn_reset_flag(c3cn, C3CN_ABORT_REQ_RCVD);
+
+       /*
+        * Three cases to consider:
+        * a) We haven't sent an abort_req; close the connection.
+        * b) We have sent a post-close abort_req that will get to TP too late
+        *    and will generate a CPL_ERR_ABORT_FAILED reply.  The reply will
+        *    be ignored and the connection should be closed now.
+        * c) We have sent a regular abort_req that will get to TP too late.
+        *    That will generate an abort_rpl with status 0, wait for it.
+        */
+       send_abort_rpl(skb, c3cn->cdev, rst_status);
+
+       if (!c3cn_flag(c3cn, C3CN_ABORT_RPL_PENDING)) {
+               c3cn->err =
+                   abort_status_to_errno(c3cn, req->status, &rst_status);
+
+               c3cn_done(c3cn);
+       }
+}
+
+/*
+ * Process abort replies.  We only process these messages if we anticipate
+ * them as the coordination between SW and HW in this area is somewhat lacking
+ * and sometimes we get ABORT_RPLs after we are done with the connection that
+ * originated the ABORT_REQ.
+ */
+static void process_abort_rpl(struct s3_conn *c3cn,
+                             struct sk_buff *skb)
+{
+       c3cn_conn_debug("c3cn 0x%p, state 0x%x, flag 0x%lx.\n",
+                       c3cn, c3cn->state, c3cn->flags);
+
+       if (c3cn_flag(c3cn, C3CN_ABORT_RPL_PENDING)) {
+               if (!c3cn_flag(c3cn, C3CN_ABORT_RPL_RCVD))
+                       c3cn_set_flag(c3cn, C3CN_ABORT_RPL_RCVD);
+               else {
+                       c3cn_reset_flag(c3cn, C3CN_ABORT_RPL_RCVD);
+                       c3cn_reset_flag(c3cn, C3CN_ABORT_RPL_PENDING);
+                       BUG_ON(c3cn_flag(c3cn, C3CN_ABORT_REQ_RCVD));
+                       c3cn_done(c3cn);
+               }
+       }
+       __kfree_skb(skb);
+}
+
+/*
+ * Process a peer ACK to our FIN.
+ */
+static void process_close_con_rpl(struct s3_conn *c3cn,
+                                 struct sk_buff *skb)
+{
+       struct cpl_close_con_rpl *rpl = cplhdr(skb);
+
+       c3cn_conn_debug("c3cn 0x%p, state 0x%x, flag 0x%lx.\n",
+                       c3cn, c3cn->state, c3cn->flags);
+
+       c3cn->snd_una = ntohl(rpl->snd_nxt) - 1;        /* exclude FIN */
+
+       if (c3cn_flag(c3cn, C3CN_ABORT_RPL_PENDING))
+               goto out;
+
+       if (c3cn->state == C3CN_STATE_CLOSING) {
+               c3cn_done(c3cn);
+       } else
+               printk(KERN_ERR
+                      "%s: TID %u received CLOSE_CON_RPL in bad state %d\n",
+                      c3cn->cdev->name, c3cn->tid, c3cn->state);
+out:
+       kfree_skb(skb);
+}
+
+/*
+ * Random utility functions for CPL message processing ...
+ * =======================================================
+ */
+
+/**
+ *     find_best_mtu - find the entry in the MTU table closest to an MTU
+ *     @d: TOM state
+ *     @mtu: the target MTU
+ *
+ *     Returns the index of the value in the MTU table that is closest to but
+ *     does not exceed the target MTU.
+ */
+static unsigned int find_best_mtu(const struct t3c_data *d, unsigned short mtu)
+{
+       int i = 0;
+
+       while (i < d->nmtus - 1 && d->mtus[i + 1] <= mtu)
+               ++i;
+       return i;
+}
+
+static unsigned int select_mss(struct s3_conn *c3cn, unsigned int pmtu)
+{
+       unsigned int idx;
+       struct dst_entry *dst = c3cn->dst_cache;
+       struct t3cdev *cdev = c3cn->cdev;
+       const struct t3c_data *td = T3C_DATA(cdev);
+       u16 advmss = dst_metric(dst, RTAX_ADVMSS);
+
+       if (advmss > pmtu - 40)
+               advmss = pmtu - 40;
+       if (advmss < td->mtus[0] - 40)
+               advmss = td->mtus[0] - 40;
+       idx = find_best_mtu(td, advmss + 40);
+       return idx;
+}
+
+static void fail_act_open(struct s3_conn *c3cn, int errno)
+{
+       c3cn_conn_debug("c3cn 0x%p, state 0x%x, flag 0x%lx.\n",
+                       c3cn, c3cn->state, c3cn->flags);
+
+       c3cn->err = errno;
+       c3cn_done(c3cn);
+}
+
+/*
+ * Assign offload parameters to some connection fields.
+ */
+static void init_offload_conn(struct s3_conn *c3cn,
+                             struct t3cdev *cdev,
+                             struct dst_entry *dst)
+{
+       BUG_ON(c3cn->cdev != cdev);
+       c3cn->wr_max = c3cn->wr_avail = T3C_DATA(cdev)->max_wrs;
+       c3cn->wr_unacked = 0;
+       c3cn->mss_idx = select_mss(c3cn, dst_mtu(dst));
+
+       c3cn->ctrl_skb_cache = alloc_skb(CTRL_SKB_LEN, gfp_any());
+       reset_wr_list(c3cn);
+}
+
+static void act_open_retry_timer(unsigned long data)
+{
+       struct sk_buff *skb;
+       struct s3_conn *c3cn = (struct s3_conn *)data;
+
+       c3cn_conn_debug("c3cn 0x%p, state 0x%x.\n", c3cn, c3cn->state);
+
+       spin_lock(&c3cn->lock);
+       skb = alloc_skb(sizeof(struct cpl_act_open_req), GFP_ATOMIC);
+       if (!skb)
+               fail_act_open(c3cn, ENOMEM);
+       else {
+               skb->sk = (struct sock *)c3cn;
+               set_arp_failure_handler(skb, act_open_req_arp_failure);
+               mk_act_open_req(c3cn, skb, c3cn->tid, c3cn->l2t);
+               l2t_send(c3cn->cdev, skb, c3cn->l2t);
+       }
+       spin_unlock(&c3cn->lock);
+       c3cn_put(c3cn);
+}
+
+/*
+ * Convert an ACT_OPEN_RPL status to a Linux errno.
+ */
+static int act_open_rpl_status_to_errno(int status)
+{
+       switch (status) {
+       case CPL_ERR_CONN_RESET:
+               return ECONNREFUSED;
+       case CPL_ERR_ARP_MISS:
+               return EHOSTUNREACH;
+       case CPL_ERR_CONN_TIMEDOUT:
+               return ETIMEDOUT;
+       case CPL_ERR_TCAM_FULL:
+               return ENOMEM;
+       case CPL_ERR_CONN_EXIST:
+               printk(KERN_ERR "ACTIVE_OPEN_RPL: 4-tuple in use\n");
+               return EADDRINUSE;
+       default:
+               return EIO;
+       }
+}
+
+/*
+ * Convert the status code of an ABORT_REQ into a Linux error code.  Also
+ * indicate whether RST should be sent in response.
+ */
+static int abort_status_to_errno(struct s3_conn *c3cn,
+                                int abort_reason, int *need_rst)
+{
+       switch (abort_reason) {
+       case CPL_ERR_BAD_SYN: /* fall through */
+       case CPL_ERR_CONN_RESET:
+               return c3cn->state == C3CN_STATE_CLOSING ? EPIPE : ECONNRESET;
+       case CPL_ERR_XMIT_TIMEDOUT:
+       case CPL_ERR_PERSIST_TIMEDOUT:
+       case CPL_ERR_FINWAIT2_TIMEDOUT:
+       case CPL_ERR_KEEPALIVE_TIMEDOUT:
+               return ETIMEDOUT;
+       default:
+               return EIO;
+       }
+}
+
+static void send_abort_rpl(struct sk_buff *skb, struct t3cdev *cdev,
+                          int rst_status)
+{
+       struct sk_buff *reply_skb;
+       struct cpl_abort_req_rss *req = cplhdr(skb);
+
+       reply_skb = get_cpl_reply_skb(skb, sizeof(struct cpl_abort_rpl),
+                                     gfp_any());
+
+       reply_skb->priority = CPL_PRIORITY_DATA;
+       set_abort_rpl_wr(reply_skb, GET_TID(req), rst_status);
+       kfree_skb(skb);
+       cxgb3_ofld_send(cdev, reply_skb);
+}
+
+/*
+ * 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 *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;
+}
+
+/*
+ * Release resources held by an offload connection (TID, L2T entry, etc.)
+ */
+static void t3_release_offload_resources(struct s3_conn *c3cn)
+{
+       struct t3cdev *cdev = c3cn->cdev;
+       unsigned int tid = c3cn->tid;
+
+       if (!cdev)
+               return;
+
+       c3cn->qset = 0;
+
+       kfree_skb(c3cn->ctrl_skb_cache);
+       c3cn->ctrl_skb_cache = NULL;
+
+       if (c3cn->wr_avail != c3cn->wr_max) {
+               purge_wr_queue(c3cn);
+               reset_wr_list(c3cn);
+       }
+
+       if (c3cn->l2t) {
+               l2t_release(L2DATA(cdev), c3cn->l2t);
+               c3cn->l2t = NULL;
+       }
+
+       if (c3cn->state == C3CN_STATE_SYN_SENT) /* we have ATID */
+               free_atid(cdev, tid);
+       else {          /* we have TID */
+               cxgb3_remove_tid(cdev, (void *)c3cn, tid);
+               c3cn_put(c3cn);
+       }
+
+       c3cn->cdev = NULL;
+}
+
+/*
+ * Handles Rx data that arrives in a state where the connection isn't
+ * accepting new data.
+ */
+static void handle_excess_rx(struct s3_conn *c3cn, struct sk_buff *skb)
+{
+       if (!c3cn_flag(c3cn, C3CN_ABORT_SHUTDOWN))
+               abort_conn(c3cn, skb);
+
+       kfree_skb(skb);
+}
+
+/*
+ * Like get_cpl_reply_skb() but the returned buffer starts out empty.
+ */
+static struct sk_buff *__get_cpl_reply_skb(struct sk_buff *skb, size_t len,
+                                          gfp_t gfp)
+{
+       if (likely(!skb_cloned(skb) && !skb->data_len)) {
+               __skb_trim(skb, 0);
+               skb_get(skb);
+       } else
+               skb = alloc_skb(len, gfp);
+       return skb;
+}
+
+/*
+ * Completes some final bits of initialization for just established connections
+ * and changes their state to C3CN_STATE_ESTABLISHED.
+ *
+ * snd_isn here is the ISN after the SYN, i.e., the true ISN + 1.
+ */
+static void make_established(struct s3_conn *c3cn, u32 snd_isn,
+                            unsigned int opt)
+{
+       c3cn_conn_debug("c3cn 0x%p, state 0x%x.\n", c3cn, c3cn->state);
+
+       c3cn->write_seq = c3cn->snd_nxt = c3cn->snd_una = snd_isn;
+
+       /*
+        * Causes the first RX_DATA_ACK to supply any Rx credits we couldn't
+        * pass through opt0.
+        */
+       if (cxgb3_rcv_win > (M_RCV_BUFSIZ << 10))
+               c3cn->rcv_wup -= cxgb3_rcv_win - (M_RCV_BUFSIZ << 10);
+
+       dst_confirm(c3cn->dst_cache);
+
+       smp_mb();
+       c3cn_set_state(c3cn, C3CN_STATE_ESTABLISHED);
+}
--- /dev/null
+++ b/drivers/scsi/cxgb3i/cxgb3i_offload.h
@@ -0,0 +1,220 @@
+/*
+ * Copyright (C) 2003-2008 Chelsio Communications.  All rights reserved.
+ *
+ * Written by Dimitris Michailidis (dm@chelsio.com)
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the LICENSE file included in this
+ * release for licensing terms and conditions.
+ */
+
+#ifndef _CXGB3I_OFFLOAD_H
+#define _CXGB3I_OFFLOAD_H
+
+#include <linux/skbuff.h>
+#include <net/tcp.h>
+
+#include "common.h"
+#include "adapter.h"
+#include "t3cdev.h"
+#include "cxgb3_offload.h"
+
+#define cxgb3i_log_error(fmt...) printk(KERN_ERR "cxgb3i: ERR! " fmt)
+#define cxgb3i_log_warn(fmt...)         printk(KERN_WARNING "cxgb3i: WARN! " fmt)
+#define cxgb3i_log_info(fmt...)  printk(KERN_INFO "cxgb3i: " fmt)
+
+#ifdef __DEBUG_CXGB3I__
+#define cxgb3i_log_debug(fmt, args...) \
+       printk(KERN_INFO "cxgb3i: %s - " fmt, __func__ , ## args)
+#else
+#define cxgb3i_log_debug(fmt...)
+#endif
+
+#ifdef __DEBUG_C3CN_CONN__
+#define c3cn_conn_debug         cxgb3i_log_debug
+#else
+#define c3cn_conn_debug(fmt...)
+#endif
+
+/*
+ * Data structure to keep track of cxgb3 connection.
+ */
+struct s3_conn {
+       struct net_device *dev;         /* net device of with connection */
+       struct t3cdev *cdev;            /* adapter t3cdev for net device */
+       unsigned long flags;            /* see c3cn_flags below */
+       int tid;                        /* ID of TCP Control Block */
+       int qset;                       /* queue Set used by connection */
+       int mss_idx;                    /* Maximum Segment Size table index */
+       struct l2t_entry *l2t;          /* ARP resolution for offload packets */
+       int wr_max;                     /* maximum in-flight writes */
+       int wr_avail;                   /* number of writes available */
+       int wr_unacked;                 /* writes since last request for */
+                                       /*   completion notification */
+       struct sk_buff *wr_pending_head;/* head of pending write queue */
+       struct sk_buff *wr_pending_tail;/* tail of pending write queue */
+       struct sk_buff *ctrl_skb_cache; /* single entry cached skb for */
+                                       /*   short-term control operations */
+       spinlock_t lock;                /* connection status lock */
+       atomic_t refcnt;                /* reference count on connection */
+       volatile unsigned int state;    /* connection state */
+       struct sockaddr_in saddr;       /* source IP/port address */
+       struct sockaddr_in daddr;       /* destination IP/port address */
+       struct dst_entry *dst_cache;    /* reference to destination route */
+       unsigned char shutdown;         /* shutdown status */
+       struct sk_buff_head receive_queue;/* received PDUs */
+       struct sk_buff_head write_queue;/* un-pushed pending writes */
+
+       struct timer_list retry_timer;  /* retry timer for various operations */
+       int err;                        /* connection error status */
+       rwlock_t callback_lock;         /* lock for opaque user context */
+       void *user_data;                /* opaque user context */
+
+       u32 rcv_nxt;                    /* what we want to receive next */
+       u32 copied_seq;                 /* head of yet unread data */
+       u32 rcv_wup;                    /* rcv_nxt on last window update sent */
+       u32 snd_nxt;                    /* next sequence we send */
+       u32 snd_una;                    /* first byte we want an ack for */
+
+       u32 write_seq;                  /* tail+1 of data held in send buffer */
+};
+
+/* Flags in c3cn->shutdown */
+#define C3CN_RCV_SHUTDOWN      0x1
+#define C3CN_SEND_SHUTDOWN     0x2
+#define C3CN_SHUTDOWN_MASK     (C3CN_RCV_SHUTDOWN | C3CN_SEND_SHUTDOWN)
+
+/*
+ * connection state bitmap
+ */
+#define C3CN_STATE_CLOSE       0x1
+#define C3CN_STATE_SYN_SENT    0x2
+#define C3CN_STATE_ESTABLISHED 0x4
+#define C3CN_STATE_CLOSING     0x8
+#define C3CN_STATE_ABORING     0x10
+
+#define C3CN_STATE_MASK                0xFF
+
+static inline unsigned int c3cn_in_state(const struct s3_conn *c3cn,
+                                        unsigned int states)
+{
+       return states & c3cn->state;
+}
+
+/*
+ * Connection flags -- many to track some close related events.
+ */
+enum c3cn_flags {
+       C3CN_ABORT_RPL_RCVD,    /* received one ABORT_RPL_RSS message */
+       C3CN_ABORT_REQ_RCVD,    /* received one ABORT_REQ_RSS message */
+       C3CN_TX_WAIT_IDLE,      /* suspend Tx until in-flight data is ACKed */
+       C3CN_ABORT_SHUTDOWN,    /* shouldn't send more abort requests */
+
+       C3CN_ABORT_RPL_PENDING, /* expecting an abort reply */
+       C3CN_CLOSE_CON_REQUESTED,       /* we've sent a close_conn_req */
+       C3CN_TX_DATA_SENT,      /* already sent a TX_DATA WR */
+       C3CN_CLOSE_NEEDED,      /* need to be closed */
+       C3CN_DONE,
+};
+
+/*
+ * Per adapter data.  Linked off of each Ethernet device port on the adapter.
+ * Also available via the t3cdev structure since we have pointers to our port
+ * net_device's there ...
+ */
+struct cxgb3i_sdev_data {
+       struct list_head list;          /* links for list of all adapters */
+       struct t3cdev *cdev;            /* adapter t3cdev */
+       struct cxgb3_client *client;    /* CPL client pointer */
+       struct adap_ports *ports;       /* array of adapter ports */
+       unsigned int rx_page_size;      /* RX page size */
+       struct sk_buff_head deferq;     /* queue for processing replies from */
+                                       /*   worker thread context */
+       struct work_struct deferq_task; /* worker thread */
+};
+#define NDEV2CDATA(ndev) (*(struct cxgb3i_sdev_data **)&(ndev)->ec_ptr)
+#define CXGB3_SDEV_DATA(cdev) NDEV2CDATA((cdev)->lldev)
+
+/*
+ * Primary API routines.
+ */
+void cxgb3i_sdev_cleanup(void);
+int cxgb3i_sdev_init(cxgb3_cpl_handler_func *);
+void cxgb3i_sdev_add(struct t3cdev *, struct cxgb3_client *);
+void cxgb3i_sdev_remove(struct t3cdev *);
+
+struct s3_conn *cxgb3i_c3cn_create(void);
+int cxgb3i_c3cn_connect(struct s3_conn *, struct sockaddr_in *);
+void cxgb3i_c3cn_rx_credits(struct s3_conn *, int);
+int cxgb3i_c3cn_send_pdus(struct s3_conn *, struct sk_buff *, int);
+void cxgb3i_c3cn_release(struct s3_conn *);
+
+/*
+ * Definitions for sk_buff state and ULP mode management.
+ */
+
+struct cxgb3_skb_cb {
+       __u8 flags;             /* see C3CB_FLAG_* below */
+       __u8 ulp_mode;          /* ULP mode/submode of sk_buff */
+       __u32 seq;              /* sequence number */
+       __u32 ddigest;          /* ULP rx_data_ddp selected field */
+       __u32 pdulen;           /* ULP rx_data_ddp selected field */
+       __u8 ulp_data[16];      /* scratch area for ULP */
+};
+
+#define CXGB3_SKB_CB(skb)      ((struct cxgb3_skb_cb *)&((skb)->cb[0]))
+
+#define skb_ulp_mode(skb)      (CXGB3_SKB_CB(skb)->ulp_mode)
+#define skb_ulp_ddigest(skb)   (CXGB3_SKB_CB(skb)->ddigest)
+#define skb_ulp_pdulen(skb)    (CXGB3_SKB_CB(skb)->pdulen)
+#define skb_ulp_data(skb)      (CXGB3_SKB_CB(skb)->ulp_data)
+
+enum {
+       C3CB_FLAG_NEED_HDR = 1 << 0,    /* packet needs a TX_DATA_WR header */
+       C3CB_FLAG_NO_APPEND = 1 << 1,   /* don't grow this skb */
+       C3CB_FLAG_BARRIER = 1 << 2,     /* set TX_WAIT_IDLE after sending */
+       C3CB_FLAG_COMPL = 1 << 4,       /* request WR completion */
+};
+
+/*
+ * Top-level CPL message processing used by most CPL messages that
+ * pertain to connections.
+ */
+static inline void process_cpl_msg(void (*fn)(struct s3_conn *,
+                                             struct sk_buff *),
+                                  struct s3_conn *c3cn,
+                                  struct sk_buff *skb)
+{
+       spin_lock(&c3cn->lock);
+       fn(c3cn, skb);
+       spin_unlock(&c3cn->lock);
+}
+
+/*
+ * Opaque version of structure the SGE stores at skb->head of TX_DATA packets
+ * and for which we must reserve space.
+ */
+struct sge_opaque_hdr {
+       void *dev;
+       dma_addr_t addr[MAX_SKB_FRAGS + 1];
+};
+
+/* for TX: a skb must have a headroom of at least TX_HEADER_LEN bytes */
+#define TX_HEADER_LEN \
+               (sizeof(struct tx_data_wr) + sizeof(struct sge_opaque_hdr))
+
+void *cxgb3i_alloc_big_mem(unsigned int);
+void cxgb3i_free_big_mem(void *);
+
+/*
+ * get and set private ip for iscsi traffic
+ */
+#define cxgb3i_get_private_ipv4addr(ndev) \
+       (((struct port_info *)(netdev_priv(ndev)))->iscsi_ipv4addr)
+#define cxgb3i_set_private_ipv4addr(ndev, addr) \
+       (((struct port_info *)(netdev_priv(ndev)))->iscsi_ipv4addr) = addr
+
+/* max. connections per adapter */
+#define CXGB3I_MAX_CONN                16384
+#endif /* _CXGB3_OFFLOAD_H */
--- /dev/null
+++ b/drivers/scsi/cxgb3i/cxgb3i_ulp2.c
@@ -0,0 +1,741 @@
+/*
+ * cxgb3i_ulp2.c: Chelsio S3xx iSCSI driver.
+ *
+ * Copyright (c) 2008 Chelsio Communications, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation.
+ *
+ * Written by: Karen Xie (kxie@chelsio.com)
+ */
+
+#include <linux/skbuff.h>
+#include <scsi/scsi_cmnd.h>
+#include <scsi/scsi_host.h>
+#include <linux/crypto.h>
+
+#include "cxgb3i.h"
+#include "cxgb3i_ulp2.h"
+
+#ifdef __DEBUG_CXGB3I_RX__
+#define cxgb3i_rx_debug                cxgb3i_log_debug
+#else
+#define cxgb3i_rx_debug(fmt...)
+#endif
+
+#ifdef __DEBUG_CXGB3I_TX__
+#define cxgb3i_tx_debug                cxgb3i_log_debug
+#else
+#define cxgb3i_tx_debug(fmt...)
+#endif
+
+#ifdef __DEBUG_CXGB3I_TAG__
+#define cxgb3i_tag_debug       cxgb3i_log_debug
+#else
+#define cxgb3i_tag_debug(fmt...)
+#endif
+
+#ifdef __DEBUG_CXGB3I_DDP__
+#define cxgb3i_ddp_debug       cxgb3i_log_debug
+#else
+#define cxgb3i_ddp_debug(fmt...)
+#endif
+
+static struct page *pad_page;
+
+#define ULP2_PGIDX_MAX         4
+#define ULP2_4K_PAGE_SHIFT     12
+#define ULP2_4K_PAGE_MASK      (~((1UL << ULP2_4K_PAGE_SHIFT) - 1))
+static unsigned char ddp_page_order[ULP2_PGIDX_MAX];
+static unsigned long ddp_page_size[ULP2_PGIDX_MAX];
+static unsigned char ddp_page_shift[ULP2_PGIDX_MAX];
+static unsigned char sw_tag_idx_bits;
+static unsigned char sw_tag_age_bits;
+
+static void cxgb3i_ddp_page_init(void)
+{
+       int i;
+       unsigned long n = PAGE_SIZE >> ULP2_4K_PAGE_SHIFT;
+
+       if (PAGE_SIZE & (~ULP2_4K_PAGE_MASK)) {
+               cxgb3i_log_debug("PAGE_SIZE 0x%lx is not multiple of 4K, "
+                               "ddp disabled.\n", PAGE_SIZE);
+               return;
+       }
+       n = __ilog2_u32(n);
+       for (i = 0; i < ULP2_PGIDX_MAX; i++, n++) {
+               ddp_page_order[i] = n;
+               ddp_page_shift[i] = ULP2_4K_PAGE_SHIFT + n;
+               ddp_page_size[i] = 1 << ddp_page_shift[i];
+               cxgb3i_log_debug("%d, order %u, shift %u, size 0x%lx.\n", i,
+                                ddp_page_order[i], ddp_page_shift[i],
+                                ddp_page_size[i]);
+       }
+
+       sw_tag_idx_bits = (__ilog2_u32(ISCSI_ITT_MASK)) + 1;
+       sw_tag_age_bits = (__ilog2_u32(ISCSI_AGE_MASK)) + 1;
+}
+
+static inline void ulp_mem_io_set_hdr(struct sk_buff *skb, unsigned int addr)
+{
+       struct ulp_mem_io *req = (struct ulp_mem_io *)skb->head;
+
+       req->wr.wr_lo = 0;
+       req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_BYPASS));
+       req->cmd_lock_addr = htonl(V_ULP_MEMIO_ADDR(addr >> 5) |
+                                  V_ULPTX_CMD(ULP_MEM_WRITE));
+       req->len = htonl(V_ULP_MEMIO_DATA_LEN(PPOD_SIZE >> 5) |
+                        V_ULPTX_NFLITS((PPOD_SIZE >> 3) + 1));
+}
+
+static int set_ddp_map(struct cxgb3i_adapter *snic, struct pagepod_hdr *hdr,
+                      unsigned int idx, unsigned int npods,
+                      struct scatterlist *sgl, unsigned int sgcnt)
+{
+       struct cxgb3i_ddp_info *ddp = &snic->ddp;
+       struct scatterlist *sg = sgl;
+       unsigned int pm_addr = (idx << PPOD_SIZE_SHIFT) + ddp->llimit;
+       int i;
+
+       for (i = 0; i < npods; i++, pm_addr += PPOD_SIZE) {
+               struct sk_buff *skb;
+               struct pagepod *ppod;
+               int j, k;
+               skb =
+                   alloc_skb(sizeof(struct ulp_mem_io) + PPOD_SIZE,
+                             GFP_ATOMIC);
+               if (!skb) {
+                       cxgb3i_log_debug("skb OMM.\n");
+                       return -ENOMEM;
+               }
+               skb_put(skb, sizeof(struct ulp_mem_io) + PPOD_SIZE);
+
+               ulp_mem_io_set_hdr(skb, pm_addr);
+               ppod =
+                   (struct pagepod *)(skb->head + sizeof(struct ulp_mem_io));
+               memcpy(&(ppod->hdr), hdr, sizeof(struct pagepod));
+               for (j = 0, k = i * 4; j < 5; j++, k++) {
+                       if (k < sgcnt) {
+                               ppod->addr[j] = cpu_to_be64(sg_dma_address(sg));
+                               if (j < 4)
+                                       sg = sg_next(sg);
+                       } else
+                               ppod->addr[j] = 0UL;
+               }
+
+               skb->priority = CPL_PRIORITY_CONTROL;
+               cxgb3_ofld_send(snic->tdev, skb);
+       }
+       return 0;
+}
+
+static int clear_ddp_map(struct cxgb3i_adapter *snic, unsigned int idx,
+                        unsigned int npods)
+{
+       struct cxgb3i_ddp_info *ddp = &snic->ddp;
+       unsigned int pm_addr = (idx << PPOD_SIZE_SHIFT) + ddp->llimit;
+       int i;
+
+       for (i = 0; i < npods; i++, pm_addr += PPOD_SIZE) {
+               struct sk_buff *skb;
+               skb =
+                   alloc_skb(sizeof(struct ulp_mem_io) + PPOD_SIZE,
+                             GFP_ATOMIC);
+               if (!skb)
+                       return -ENOMEM;
+               skb_put(skb, sizeof(struct ulp_mem_io) + PPOD_SIZE);
+               memset((skb->head + sizeof(struct ulp_mem_io)), 0, PPOD_SIZE);
+               ulp_mem_io_set_hdr(skb, pm_addr);
+               skb->priority = CPL_PRIORITY_CONTROL;
+               cxgb3_ofld_send(snic->tdev, skb);
+       }
+       return 0;
+}
+
+static int cxgb3i_ddp_sgl_check(struct scatterlist *sgl, unsigned int sgcnt)
+{
+       struct scatterlist *sg;
+       int i;
+
+       /* make sure the sgl is fit for ddp:
+        *      each has the same page size, and
+        *      first & last page do not need to be used completely, and
+        *      the rest of page must be used completely
+        */
+       for_each_sg(sgl, sg, sgcnt, i) {
+               if ((i && sg->offset) ||
+                   ((i != sgcnt - 1) &&
+                    (sg->length + sg->offset) != PAGE_SIZE)) {
+                       cxgb3i_tag_debug("sg %u/%u, off %u, len %u.\n",
+                                        i, sgcnt, sg->offset, sg->length);
+                       return -EINVAL;
+               }
+       }
+
+       return 0;
+}
+
+static inline int ddp_find_unused_entries(struct cxgb3i_ddp_info *ddp,
+                                         int start, int max, int count)
+{
+       unsigned int i, j;
+
+       spin_lock(&ddp->map_lock);
+       for (i = start; i <= max;) {
+               for (j = 0; j < count; j++) {
+                       if (ddp->map[i + j])
+                               break;
+               }
+               if (j == count) {
+                       memset(&ddp->map[i], 1, count);
+                       spin_unlock(&ddp->map_lock);
+                       return i;
+               }
+               i += j + 1;
+       }
+       spin_unlock(&ddp->map_lock);
+       return -EBUSY;
+}
+
+static inline void ddp_unmark_entries(struct cxgb3i_ddp_info *ddp,
+                                     int start, int count)
+{
+       spin_lock(&ddp->map_lock);
+       memset(&ddp->map[start], 0, count);
+       spin_unlock(&ddp->map_lock);
+}
+
+static inline int sgl_map(struct cxgb3i_adapter *snic,
+                         struct scatterlist *sgl, unsigned int sgcnt)
+{
+       struct scatterlist *sg;
+       int i, err;
+
+       for_each_sg(sgl, sg, sgcnt, i) {
+               err = pci_map_sg(snic->pdev, sg, 1, PCI_DMA_FROMDEVICE);
+               if (err <= 0) {
+                       cxgb3i_tag_debug("sgcnt %d/%u, pci map failed %d.\n",
+                                        i, sgcnt, err);
+                       return err;
+               }
+       }
+       return sgcnt;
+}
+
+static inline void sgl_unmap(struct cxgb3i_adapter *snic,
+                            struct scatterlist *sgl, unsigned int sgcnt)
+{
+       struct scatterlist *sg;
+       int i;
+
+       for_each_sg(sgl, sg, sgcnt, i) {
+               if (sg_dma_address(sg))
+                       pci_unmap_sg(snic->pdev, sg, 1, PCI_DMA_FROMDEVICE);
+               else
+                       break;
+       }
+}
+
+u32 cxgb3i_ddp_tag_reserve(struct cxgb3i_adapter *snic, unsigned int tid,
+                          u32 sw_tag, unsigned int xferlen,
+                          struct scatterlist *sgl, unsigned int sgcnt)
+{
+       struct cxgb3i_ddp_info *ddp = &snic->ddp;
+       struct pagepod_hdr hdr;
+       unsigned int npods;
+       int idx = -1, idx_max;
+       u32 tag;
+       int err;
+
+       if (!ddp || !sgcnt || xferlen < PAGE_SIZE) {
+               cxgb3i_tag_debug("sgcnt %u, xferlen %u < %lu, NO DDP.\n",
+                                sgcnt, xferlen, PAGE_SIZE);
+               return RESERVED_ITT;
+       }
+
+       err = cxgb3i_ddp_sgl_check(sgl, sgcnt);
+       if (err < 0) {
+               cxgb3i_tag_debug("sgcnt %u, xferlen %u, SGL check fail.\n",
+                                sgcnt, xferlen);
+               return RESERVED_ITT;
+       }
+
+       npods = (sgcnt + PPOD_PAGES_MAX - 1) >> PPOD_PAGES_SHIFT;
+       idx_max = ddp->nppods - npods + 1;
+
+       if (ddp->idx_last == ddp->nppods)
+               idx = ddp_find_unused_entries(ddp, 0, idx_max, npods);
+       else {
+               idx = ddp_find_unused_entries(ddp, ddp->idx_last + 1, idx_max,
+                                             npods);
+               if ((idx < 0) && (ddp->idx_last >= npods))
+                       idx = ddp_find_unused_entries(ddp, 0,
+                                                     ddp->idx_last - npods + 1,
+                                                     npods);
+       }
+       if (idx < 0) {
+               cxgb3i_tag_debug("sgcnt %u, xferlen %u, npods %u NO DDP.\n",
+                                sgcnt, xferlen, npods);
+               return RESERVED_ITT;
+       }
+
+       err = sgl_map(snic, sgl, sgcnt);
+       if (err < sgcnt)
+               goto unmap_sgl;
+
+       tag = sw_tag | (idx << snic->tag_format.rsvd_shift);
+
+       hdr.rsvd = 0;
+       hdr.vld_tid = htonl(F_PPOD_VALID | V_PPOD_TID(tid));
+       hdr.pgsz_tag_clr = htonl(tag & snic->tag_format.rsvd_tag_mask);
+       hdr.maxoffset = htonl(xferlen);
+       hdr.pgoffset = htonl(sgl->offset);
+
+       if (set_ddp_map(snic, &hdr, idx, npods, sgl, sgcnt) < 0)
+               goto unmap_sgl;
+
+       ddp->idx_last = idx;
+       cxgb3i_tag_debug("tid 0x%x, xfer %u, 0x%x -> ddp 0x%x (0x%x, %u).\n",
+                        tid, xferlen, sw_tag, tag, idx, npods);
+       return tag;
+
+unmap_sgl:
+       sgl_unmap(snic, sgl, sgcnt);
+       ddp_unmark_entries(ddp, idx, npods);
+       return RESERVED_ITT;
+}
+
+void cxgb3i_ddp_tag_release(struct cxgb3i_adapter *snic, u32 tag,
+                           struct scatterlist *sgl, unsigned int sgcnt)
+{
+       u32 idx = (tag >> snic->tag_format.rsvd_shift) &
+                 snic->tag_format.rsvd_mask;
+       unsigned int npods = (sgcnt + PPOD_PAGES_MAX - 1) >> PPOD_PAGES_SHIFT;
+
+       if (idx < snic->tag_format.rsvd_mask) {
+               cxgb3i_tag_debug("ddp tag 0x%x, release idx 0x%x, npods %u.\n",
+                                tag, idx, npods);
+               clear_ddp_map(snic, idx, npods);
+               ddp_unmark_entries(&snic->ddp, idx, npods);
+               sgl_unmap(snic, sgl, sgcnt);
+       }
+}
+
+int cxgb3i_conn_ulp_setup(struct cxgb3i_conn *cconn, int hcrc, int dcrc)
+{
+       struct iscsi_tcp_conn *tcp_conn = cconn->conn->dd_data;
+       struct s3_conn *c3cn = (struct s3_conn *)(tcp_conn->sock);
+       struct sk_buff *skb = alloc_skb(sizeof(struct cpl_set_tcb_field),
+                                       GFP_KERNEL | __GFP_NOFAIL);
+       struct cpl_set_tcb_field *req;
+       u32 submode = (hcrc ? 1 : 0) | (dcrc ? 2 : 0);
+
+       /* set up ulp submode and page size */
+       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, c3cn->tid));
+       req->reply = V_NO_REPLY(1);
+       req->cpu_idx = 0;
+       req->word = htons(31);
+       req->mask = cpu_to_be64(0xFF000000);
+       /* the connection page size is always the same as ddp-pgsz0 */
+       req->val = cpu_to_be64(submode << 24);
+       skb->priority = CPL_PRIORITY_CONTROL;
+
+       cxgb3_ofld_send(c3cn->cdev, skb);
+       return 0;
+}
+
+static int cxgb3i_conn_read_pdu_skb(struct iscsi_conn *conn,
+                                   struct sk_buff *skb)
+{
+       struct iscsi_tcp_conn *tcp_conn = conn->dd_data;
+       struct iscsi_segment *segment = &tcp_conn->in.segment;
+       struct iscsi_hdr *hdr = (struct iscsi_hdr *)tcp_conn->in.hdr_buf;
+       unsigned char *buf = (unsigned char *)hdr;
+       unsigned int offset = sizeof(struct iscsi_hdr);
+       int err;
+
+       cxgb3i_rx_debug("conn 0x%p, skb 0x%p, len %u, flag 0x%x.\n",
+                       conn, skb, skb->len, skb_ulp_mode(skb));
+
+       /* read bhs */
+       err = skb_copy_bits(skb, 0, buf, sizeof(struct iscsi_hdr));
+       if (err < 0)
+               return err;
+       segment->copied = sizeof(struct iscsi_hdr);
+       /* read ahs */
+       if (hdr->hlength) {
+               unsigned int ahslen = hdr->hlength << 2;
+               /* Make sure we don't overflow */
+               if (sizeof(*hdr) + ahslen > sizeof(tcp_conn->in.hdr_buf))
+                       return -ISCSI_ERR_AHSLEN;
+               err = skb_copy_bits(skb, offset, buf + offset, ahslen);
+               if (err < 0)
+                       return err;
+               offset += ahslen;
+       }
+       /* header digest */
+       if (conn->hdrdgst_en)
+               offset += ISCSI_DIGEST_SIZE;
+
+       /* check header digest */
+       segment->status = (conn->hdrdgst_en &&
+                          (skb_ulp_mode(skb) & ULP2_FLAG_HCRC_ERROR)) ?
+           ISCSI_SEGMENT_DGST_ERR : 0;
+
+       hdr->itt = ntohl(hdr->itt);
+       segment->total_copied = segment->total_size;
+       tcp_conn->in.hdr = hdr;
+       err = iscsi_tcp_hdr_dissect(conn, hdr);
+       if (err)
+               return err;
+
+       if (tcp_conn->in.datalen) {
+               segment = &tcp_conn->in.segment;
+               segment->status = (conn->datadgst_en &&
+                                  (skb_ulp_mode(skb) & ULP2_FLAG_DCRC_ERROR)) ?
+                   ISCSI_SEGMENT_DGST_ERR : 0;
+               if (skb_ulp_mode(skb) & ULP2_FLAG_DATA_DDPED) {
+                       cxgb3i_ddp_debug("opcode 0x%x, data %u, ddp'ed.\n",
+                                        hdr->opcode & ISCSI_OPCODE_MASK,
+                                        tcp_conn->in.datalen);
+                       segment->total_copied = segment->total_size;
+               } else
+                       offset += sizeof(struct cpl_iscsi_hdr_norss);
+
+               while (segment->total_copied < segment->total_size) {
+                       iscsi_tcp_segment_map(segment, 1);
+                       err = skb_copy_bits(skb, offset, segment->data,
+                                           segment->size);
+                       iscsi_tcp_segment_unmap(segment);
+                       if (err)
+                               return err;
+                       segment->total_copied += segment->size;
+                       offset += segment->size;
+
+                       if (segment->total_copied < segment->total_size)
+                               iscsi_tcp_segment_init_sg(segment,
+                                                         sg_next(segment->sg),
+                                                         0);
+               }
+               err = segment->done(tcp_conn, segment);
+       }
+       return err;
+}
+
+static inline void tx_skb_setmode(struct sk_buff *skb, int hcrc, int dcrc)
+{
+       u8 submode = 0;
+
+       if (hcrc)
+               submode |= 1;
+       if (dcrc)
+               submode |= 2;
+       skb_ulp_mode(skb) = (ULP_MODE_ISCSI << 4) | submode;
+}
+
+int cxgb3i_conn_ulp2_xmit(struct iscsi_conn *conn)
+{
+       struct iscsi_tcp_conn *tcp_conn = conn->dd_data;
+       struct iscsi_segment *hdr_seg = &tcp_conn->out.segment;
+       struct iscsi_segment *data_seg = &tcp_conn->out.data_segment;
+       unsigned int hdrlen = hdr_seg->total_size;
+       unsigned int datalen = data_seg->total_size;
+       unsigned int padlen = iscsi_padding(datalen);
+       unsigned int copymax = SKB_MAX_HEAD(TX_HEADER_LEN);
+       unsigned int copylen;
+       struct sk_buff *skb;
+       unsigned char *dst;
+       int err = -EAGAIN;
+
+       if (data_seg->data && ((datalen + padlen) < copymax))
+               copylen = hdrlen + datalen + padlen;
+       else
+               copylen = hdrlen;
+
+       /* supports max. 16K pdus, so one skb is enough to hold all the data */
+       skb = alloc_skb(TX_HEADER_LEN + copylen, GFP_ATOMIC);
+       if (!skb)
+               return -EAGAIN;
+
+       skb_reserve(skb, TX_HEADER_LEN);
+       skb_put(skb, copylen);
+       dst = skb->data;
+
+       tx_skb_setmode(skb, conn->hdrdgst_en, datalen ? conn->datadgst_en : 0);
+
+       memcpy(dst, hdr_seg->data, hdrlen);
+       dst += hdrlen;
+
+       if (!datalen)
+               goto send_pdu;
+
+       if (data_seg->data) {
+               /* data is in a linear buffer */
+               if (copylen > hdrlen) {
+                       /* data fits in the skb's headroom */
+                       memcpy(dst, data_seg->data, datalen);
+                       dst += datalen;
+                       if (padlen)
+                               memset(dst, 0, padlen);
+               } else {
+                       unsigned int offset = 0;
+                       while (datalen) {
+                               struct page *page = alloc_page(GFP_ATOMIC);
+                               int idx = skb_shinfo(skb)->nr_frags;
+                               skb_frag_t *frag = &skb_shinfo(skb)->frags[idx];
+
+                               if (!page)
+                                       goto free_skb;
+
+                               frag->page = page;
+                               frag->page_offset = 0;
+                               if (datalen > PAGE_SIZE)
+                                       frag->size = PAGE_SIZE;
+                               else
+                                       frag->size = datalen;
+                               memcpy(page_address(page),
+                                      data_seg->data + offset, frag->size);
+
+                               skb_shinfo(skb)->nr_frags++;
+                               datalen -= frag->size;
+                               offset += frag->size;
+                       }
+               }
+       } else {
+               struct scatterlist *sg = data_seg->sg;
+               unsigned int offset = data_seg->sg_offset;
+               while (datalen) {
+                       int idx = skb_shinfo(skb)->nr_frags;
+                       skb_frag_t *frag = &skb_shinfo(skb)->frags[idx];
+                       struct page *pg = sg_page(sg);
+
+                       get_page(pg);
+                       frag->page = pg;
+                       frag->page_offset = offset + sg->offset;
+                       frag->size = min(sg->length, datalen);
+
+                       offset = 0;
+                       skb_shinfo(skb)->nr_frags++;
+                       datalen -= frag->size;
+                       sg = sg_next(sg);
+               }
+       }
+
+       if (skb_shinfo(skb)->nr_frags) {
+               if (padlen) {
+                       int idx = skb_shinfo(skb)->nr_frags;
+                       skb_frag_t *frag = &skb_shinfo(skb)->frags[idx];
+                       frag->page = pad_page;
+                       frag->page_offset = 0;
+                       frag->size = padlen;
+                       skb_shinfo(skb)->nr_frags++;
+               }
+               datalen = data_seg->total_size + padlen;
+               skb->data_len += datalen;
+               skb->truesize += datalen;
+               skb->len += datalen;
+       }
+
+send_pdu:
+       err = cxgb3i_c3cn_send_pdus((struct s3_conn *)tcp_conn->sock,
+                                   skb, MSG_DONTWAIT | MSG_NOSIGNAL);
+       if (err > 0) {
+               int pdulen = hdrlen + datalen + padlen;
+               if (conn->hdrdgst_en)
+                       pdulen += ISCSI_DIGEST_SIZE;
+               if (datalen && conn->datadgst_en)
+                       pdulen += ISCSI_DIGEST_SIZE;
+
+               hdr_seg->total_copied = hdr_seg->total_size;
+               if (datalen)
+                       data_seg->total_copied = data_seg->total_size;
+               conn->txdata_octets += pdulen;
+               return pdulen;
+       }
+
+free_skb:
+       kfree_skb(skb);
+       if (err < 0 && err != -EAGAIN) {
+               cxgb3i_log_error("conn 0x%p, xmit err %d.\n", conn, err);
+               iscsi_conn_failure(conn, ISCSI_ERR_CONN_FAILED);
+               return err;
+       }
+       return -EAGAIN;
+}
+
+int cxgb3i_ulp2_init(void)
+{
+       pad_page = alloc_page(GFP_KERNEL);
+       if (!pad_page)
+               return -ENOMEM;
+       memset(page_address(pad_page), 0, PAGE_SIZE);
+       cxgb3i_ddp_page_init();
+       return 0;
+}
+
+void cxgb3i_ulp2_cleanup(void)
+{
+       if (pad_page) {
+               __free_page(pad_page);
+               pad_page = NULL;
+       }
+}
+
+void cxgb3i_conn_pdu_ready(struct s3_conn *c3cn)
+{
+       struct sk_buff *skb;
+       unsigned int read = 0;
+       struct iscsi_conn *conn = c3cn->user_data;
+       int err = 0;
+
+       cxgb3i_rx_debug("cn 0x%p.\n", c3cn);
+
+       read_lock(&c3cn->callback_lock);
+       if (unlikely(!conn || conn->suspend_rx)) {
+               cxgb3i_rx_debug("conn 0x%p, id %d, suspend_rx %lu!\n",
+                               conn, conn ? conn->id : 0xFF,
+                               conn ? conn->suspend_rx : 0xFF);
+               read_unlock(&c3cn->callback_lock);
+               return;
+       }
+       skb = skb_peek(&c3cn->receive_queue);
+       while (!err && skb) {
+               __skb_unlink(skb, &c3cn->receive_queue);
+               read += skb_ulp_pdulen(skb);
+               err = cxgb3i_conn_read_pdu_skb(conn, skb);
+               __kfree_skb(skb);
+               skb = skb_peek(&c3cn->receive_queue);
+       }
+       read_unlock(&c3cn->callback_lock);
+       if (c3cn) {
+               c3cn->copied_seq += read;
+               cxgb3i_c3cn_rx_credits(c3cn, read);
+       }
+       conn->rxdata_octets += read;
+
+       if (err) {
+               cxgb3i_log_info("conn 0x%p rx failed err %d.\n", conn, err);
+               iscsi_conn_failure(conn, ISCSI_ERR_CONN_FAILED);
+       }
+}
+
+void cxgb3i_conn_tx_open(struct s3_conn *c3cn)
+{
+       struct iscsi_conn *conn = c3cn->user_data;
+       struct iscsi_tcp_conn *tcp_conn;
+
+       cxgb3i_tx_debug("cn 0x%p.\n", c3cn);
+       if (conn) {
+               cxgb3i_tx_debug("cn 0x%p, cid %d.\n", c3cn, conn->id);
+               tcp_conn = conn->dd_data;
+               scsi_queue_work(conn->session->host, &conn->xmitwork);
+       }
+}
+
+void cxgb3i_conn_closing(struct s3_conn *c3cn)
+{
+       struct iscsi_conn *conn;
+
+       read_lock(&c3cn->callback_lock);
+       conn = c3cn->user_data;
+       if (conn && c3cn->state != C3CN_STATE_ESTABLISHED)
+               iscsi_conn_failure(conn, ISCSI_ERR_CONN_FAILED);
+       read_unlock(&c3cn->callback_lock);
+}
+
+int cxgb3i_adapter_ulp_init(struct cxgb3i_adapter *snic)
+{
+       struct t3cdev *tdev = snic->tdev;
+       struct cxgb3i_ddp_info *ddp = &snic->ddp;
+       struct ulp_iscsi_info uinfo;
+       unsigned int ppmax, bits, max_bits;
+       int i, err;
+
+       spin_lock_init(&ddp->map_lock);
+
+       err = tdev->ctl(tdev, ULP_ISCSI_GET_PARAMS, &uinfo);
+       if (err < 0) {
+               cxgb3i_log_error("%s, failed to get iscsi param err=%d.\n",
+                                tdev->name, err);
+               return err;
+       }
+
+       ppmax = (uinfo.ulimit - uinfo.llimit + 1) >> PPOD_SIZE_SHIFT;
+       max_bits = min(PPOD_IDX_MAX_SIZE,
+                      (32 - sw_tag_idx_bits - sw_tag_age_bits));
+       bits = __ilog2_u32(ppmax) + 1;
+       if (bits > max_bits)
+               bits = max_bits;
+       ppmax = (1 << bits) - 1;
+
+       snic->tx_max_size = min_t(unsigned int,
+                                 uinfo.max_txsz, ULP2_MAX_PKT_SIZE);
+       snic->rx_max_size = min_t(unsigned int,
+                                 uinfo.max_rxsz, ULP2_MAX_PKT_SIZE);
+
+       snic->tag_format.idx_bits = sw_tag_idx_bits;
+       snic->tag_format.age_bits = sw_tag_age_bits;
+       snic->tag_format.rsvd_bits = bits;
+       snic->tag_format.rsvd_shift = PPOD_IDX_SHIFT;
+       snic->tag_format.rsvd_mask = (1 << snic->tag_format.rsvd_bits) - 1;
+       snic->tag_format.rsvd_tag_mask =
+               (1 << (snic->tag_format.rsvd_bits + PPOD_IDX_SHIFT)) - 1;
+
+       ddp->map = cxgb3i_alloc_big_mem(ppmax);
+       if (!ddp->map) {
+               cxgb3i_log_warn("snic unable to alloc ddp ppod 0x%u, "
+                               "ddp disabled.\n", ppmax);
+               return 0;
+       }
+       ddp->llimit = uinfo.llimit;
+       ddp->ulimit = uinfo.ulimit;
+
+       uinfo.tagmask =
+           snic->tag_format.rsvd_mask << snic->tag_format.rsvd_shift;
+       for (i = 0; i < ULP2_PGIDX_MAX; i++)
+               uinfo.pgsz_factor[i] = ddp_page_order[i];
+
+       uinfo.ulimit = uinfo.llimit + (ppmax << PPOD_SIZE_SHIFT);
+
+       err = tdev->ctl(tdev, ULP_ISCSI_SET_PARAMS, &uinfo);
+       if (err < 0) {
+               cxgb3i_log_warn("snic unable to set iscsi param err=%d, "
+                               "ddp disabled.\n", err);
+               goto free_ppod_map;
+       }
+
+       ddp->nppods = ppmax;
+       ddp->idx_last = ppmax;
+
+       tdev->ulp_iscsi = ddp;
+
+       cxgb3i_log_info("snic nppods %u (0x%x ~ 0x%x), rsvd shift %u, "
+                       "bits %u, mask 0x%x, 0x%x, pkt %u,%u.\n",
+                       ppmax, ddp->llimit, ddp->ulimit,
+                       snic->tag_format.rsvd_shift,
+                       snic->tag_format.rsvd_bits,
+                       snic->tag_format.rsvd_mask, uinfo.tagmask,
+                       snic->tx_max_size, snic->rx_max_size);
+
+       return 0;
+
+free_ppod_map:
+       cxgb3i_free_big_mem(ddp->map);
+       return 0;
+}
+
+void cxgb3i_adapter_ulp_cleanup(struct cxgb3i_adapter *snic)
+{
+       u8 *map = snic->ddp.map;
+
+       if (map) {
+               snic->tdev->ulp_iscsi = NULL;
+               spin_lock(&snic->lock);
+               snic->ddp.map = NULL;
+               spin_unlock(&snic->lock);
+               cxgb3i_free_big_mem(map);
+       }
+}
--- /dev/null
+++ b/drivers/scsi/cxgb3i/cxgb3i_ulp2.h
@@ -0,0 +1,108 @@
+/*
+ * cxgb3i_ulp2.h: Chelsio S3xx iSCSI driver.
+ *
+ * Copyright (c) 2008 Chelsio Communications, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation.
+ *
+ * Written by: Karen Xie (kxie@chelsio.com)
+ */
+
+#ifndef __CXGB3I_ULP2_H__
+#define __CXGB3I_ULP2_H__
+
+#define ULP2_PDU_PAYLOAD_DFLT  (16224 - ISCSI_PDU_HEADER_MAX)
+#define PPOD_PAGES_MAX         4
+#define PPOD_PAGES_SHIFT       2       /* 4 pages per pod */
+
+struct pagepod_hdr {
+       u32 vld_tid;
+       u32 pgsz_tag_clr;
+       u32 maxoffset;
+       u32 pgoffset;
+       u64 rsvd;
+};
+
+struct pagepod {
+       struct pagepod_hdr hdr;
+       u64 addr[PPOD_PAGES_MAX + 1];
+};
+
+#define PPOD_SIZE              sizeof(struct pagepod)  /* 64 */
+#define PPOD_SIZE_SHIFT                6
+
+#define PPOD_COLOR_SHIFT       0
+#define PPOD_COLOR_SIZE                6
+#define PPOD_COLOR_MASK                ((1 << PPOD_COLOR_SIZE) - 1)
+
+#define PPOD_IDX_SHIFT         PPOD_COLOR_SIZE
+#define PPOD_IDX_MAX_SIZE      24
+
+#define S_PPOD_TID    0
+#define M_PPOD_TID    0xFFFFFF
+#define V_PPOD_TID(x) ((x) << S_PPOD_TID)
+
+#define S_PPOD_VALID    24
+#define V_PPOD_VALID(x) ((x) << S_PPOD_VALID)
+#define F_PPOD_VALID    V_PPOD_VALID(1U)
+
+#define S_PPOD_COLOR    0
+#define M_PPOD_COLOR    0x3F
+#define V_PPOD_COLOR(x) ((x) << S_PPOD_COLOR)
+
+#define S_PPOD_TAG    6
+#define M_PPOD_TAG    0xFFFFFF
+#define V_PPOD_TAG(x) ((x) << S_PPOD_TAG)
+
+#define S_PPOD_PGSZ    30
+#define M_PPOD_PGSZ    0x3
+#define V_PPOD_PGSZ(x) ((x) << S_PPOD_PGSZ)
+
+struct cpl_iscsi_hdr_norss {
+       union opcode_tid ot;
+       u16 pdu_len_ddp;
+       u16 len;
+       u32 seq;
+       u16 urg;
+       u8 rsvd;
+       u8 status;
+};
+
+struct cpl_rx_data_ddp_norss {
+       union opcode_tid ot;
+       u16 urg;
+       u16 len;
+       u32 seq;
+       u32 nxt_seq;
+       u32 ulp_crc;
+       u32 ddp_status;
+};
+
+#define RX_DDP_STATUS_IPP_SHIFT                27      /* invalid pagepod */
+#define RX_DDP_STATUS_TID_SHIFT                26      /* tid mismatch */
+#define RX_DDP_STATUS_COLOR_SHIFT      25      /* color mismatch */
+#define RX_DDP_STATUS_OFFSET_SHIFT     24      /* offset mismatch */
+#define RX_DDP_STATUS_ULIMIT_SHIFT     23      /* ulimit error */
+#define RX_DDP_STATUS_TAG_SHIFT                22      /* tag mismatch */
+#define RX_DDP_STATUS_DCRC_SHIFT       21      /* dcrc error */
+#define RX_DDP_STATUS_HCRC_SHIFT       20      /* hcrc error */
+#define RX_DDP_STATUS_PAD_SHIFT                19      /* pad error */
+#define RX_DDP_STATUS_PPP_SHIFT                18      /* pagepod parity error */
+#define RX_DDP_STATUS_LLIMIT_SHIFT     17      /* llimit error */
+#define RX_DDP_STATUS_DDP_SHIFT                16      /* ddp'able */
+#define RX_DDP_STATUS_PMM_SHIFT                15      /* pagepod mismatch */
+
+#define ULP2_FLAG_DATA_READY           0x1
+#define ULP2_FLAG_DATA_DDPED           0x2
+#define ULP2_FLAG_HCRC_ERROR           0x10
+#define ULP2_FLAG_DCRC_ERROR           0x20
+#define ULP2_FLAG_PAD_ERROR            0x40
+
+#define ULP2_MAX_PKT_SIZE              16224
+
+void cxgb3i_conn_closing(struct s3_conn *);
+void cxgb3i_conn_pdu_ready(struct s3_conn *c3cn);
+void cxgb3i_conn_tx_open(struct s3_conn *c3cn);
+#endif
--- /dev/null
+++ b/drivers/scsi/cxgb3i/Kconfig
@@ -0,0 +1,7 @@
+config SCSI_CXGB3_ISCSI
+       tristate "Chelsio S3xx iSCSI support"
+       select CHELSIO_T3
+       select SCSI_ISCSI_ATTRS
+       select ISCSI_TCP
+       ---help---
+       This driver supports iSCSI offload for the Chelsio S3 series devices.
--- /dev/null
+++ b/drivers/scsi/cxgb3i/Makefile
@@ -0,0 +1,5 @@
+EXTRA_CFLAGS += -I$(TOPDIR)/drivers/net/cxgb3
+
+cxgb3i-y := cxgb3i_init.o cxgb3i_iscsi.o cxgb3i_ulp2.o cxgb3i_offload.o
+
+obj-$(CONFIG_SCSI_CXGB3_ISCSI) += cxgb3i.o
--- a/drivers/scsi/Kconfig
+++ b/drivers/scsi/Kconfig
@@ -352,6 +352,8 @@ config ISCSI_TCP
 
         http://open-iscsi.org
 
+source "drivers/scsi/cxgb3i/Kconfig"
+
 config SGIWD93_SCSI
        tristate "SGI WD93C93 SCSI Driver"
        depends on SGI_HAS_WD93 && SCSI
--- a/drivers/scsi/Makefile
+++ b/drivers/scsi/Makefile
@@ -40,6 +40,7 @@ obj-$(CONFIG_LIBFC)           += libfc/
 obj-$(CONFIG_FCOE)             += fcoe/
 obj-$(CONFIG_ISCSI_TCP)        += libiscsi.o   iscsi_tcp.o
 obj-$(CONFIG_INFINIBAND_ISER)  += libiscsi.o
+obj-$(CONFIG_SCSI_CXGB3_ISCSI) += iscsi_tcp.o  cxgb3i/
 obj-$(CONFIG_SCSI_A4000T)      += 53c700.o     a4000t.o
 obj-$(CONFIG_SCSI_ZORRO7XX)    += 53c700.o     zorro7xx.o
 obj-$(CONFIG_A3000_SCSI)       += a3000.o      wd33c93.o