--- /dev/null
+/*
+ * Copyright (c) 2006 Chelsio, Inc. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses. You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ * Redistribution and use in source and binary forms, with or
+ * without modification, are permitted provided that the following
+ * conditions are met:
+ *
+ * - Redistributions of source code must retain the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials
+ * provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#include <linux/module.h>
+#include <linux/list.h>
+#include <linux/slab.h>
+#include <linux/workqueue.h>
+#include <linux/skbuff.h>
+#include <linux/timer.h>
+#include <linux/notifier.h>
+#include <linux/inetdevice.h>
+
+#include <net/neighbour.h>
+#include <net/netevent.h>
+#include <net/route.h>
+
+#include "tcb.h"
+#include "cxgb3_offload.h"
+#include "iwch.h"
+#include "iwch_provider.h"
+#include "iwch_cm.h"
+
+static char *states[] = {
+ "idle",
+ "listen",
+ "connecting",
+ "mpa_wait_req",
+ "mpa_req_sent",
+ "mpa_req_rcvd",
+ "mpa_rep_sent",
+ "fpdu_mode",
+ "aborting",
+ "closing",
+ "moribund",
+ "dead",
+ NULL,
+};
+
+int peer2peer = 0;
+module_param(peer2peer, int, 0644);
+MODULE_PARM_DESC(peer2peer, "Support peer2peer ULPs (default=0)");
+
+static int ep_timeout_secs = 60;
+module_param(ep_timeout_secs, int, 0644);
+MODULE_PARM_DESC(ep_timeout_secs, "CM Endpoint operation timeout "
+ "in seconds (default=60)");
+
+static int mpa_rev = 1;
+module_param(mpa_rev, int, 0644);
+MODULE_PARM_DESC(mpa_rev, "MPA Revision, 0 supports amso1100, "
+ "1 is spec compliant. (default=1)");
+
+static int markers_enabled = 0;
+module_param(markers_enabled, int, 0644);
+MODULE_PARM_DESC(markers_enabled, "Enable MPA MARKERS (default(0)=disabled)");
+
+static int crc_enabled = 1;
+module_param(crc_enabled, int, 0644);
+MODULE_PARM_DESC(crc_enabled, "Enable MPA CRC (default(1)=enabled)");
+
+static int rcv_win = 256 * 1024;
+module_param(rcv_win, int, 0644);
+MODULE_PARM_DESC(rcv_win, "TCP receive window in bytes (default=256)");
+
+static int snd_win = 32 * 1024;
+module_param(snd_win, int, 0644);
+MODULE_PARM_DESC(snd_win, "TCP send window in bytes (default=32KB)");
+
+static unsigned int nocong = 0;
+module_param(nocong, uint, 0644);
+MODULE_PARM_DESC(nocong, "Turn off congestion control (default=0)");
+
+static unsigned int cong_flavor = 1;
+module_param(cong_flavor, uint, 0644);
+MODULE_PARM_DESC(cong_flavor, "TCP Congestion control flavor (default=1)");
+
+static struct workqueue_struct *workq;
+
+static struct sk_buff_head rxq;
+
+static struct sk_buff *get_skb(struct sk_buff *skb, int len, gfp_t gfp);
+static void ep_timeout(unsigned long arg);
+static void connect_reply_upcall(struct iwch_ep *ep, int status);
+
+static void start_ep_timer(struct iwch_ep *ep)
+{
+ PDBG("%s ep %p\n", __func__, ep);
+ if (timer_pending(&ep->timer)) {
+ PDBG("%s stopped / restarted timer ep %p\n", __func__, ep);
+ del_timer_sync(&ep->timer);
+ } else
+ get_ep(&ep->com);
+ ep->timer.expires = jiffies + ep_timeout_secs * HZ;
+ ep->timer.data = (unsigned long)ep;
+ ep->timer.function = ep_timeout;
+ add_timer(&ep->timer);
+}
+
+static void stop_ep_timer(struct iwch_ep *ep)
+{
+ PDBG("%s ep %p\n", __func__, ep);
+ if (!timer_pending(&ep->timer)) {
+ WARN(1, "%s timer stopped when its not running! ep %p state %u\n",
+ __func__, ep, ep->com.state);
+ return;
+ }
+ del_timer_sync(&ep->timer);
+ put_ep(&ep->com);
+}
+
+static int iwch_l2t_send(struct t3cdev *tdev, struct sk_buff *skb, struct l2t_entry *l2e)
+{
+ int error = 0;
+ struct cxio_rdev *rdev;
+
+ rdev = (struct cxio_rdev *)tdev->ulp;
+ if (cxio_fatal_error(rdev)) {
+ kfree_skb(skb);
+ return -EIO;
+ }
+ error = l2t_send(tdev, skb, l2e);
+ if (error < 0)
+ kfree_skb(skb);
+ return error;
+}
+
+int iwch_cxgb3_ofld_send(struct t3cdev *tdev, struct sk_buff *skb)
+{
+ int error = 0;
+ struct cxio_rdev *rdev;
+
+ rdev = (struct cxio_rdev *)tdev->ulp;
+ if (cxio_fatal_error(rdev)) {
+ kfree_skb(skb);
+ return -EIO;
+ }
+ error = cxgb3_ofld_send(tdev, skb);
+ if (error < 0)
+ kfree_skb(skb);
+ return error;
+}
+
+static void release_tid(struct t3cdev *tdev, u32 hwtid, struct sk_buff *skb)
+{
+ struct cpl_tid_release *req;
+
+ skb = get_skb(skb, sizeof *req, GFP_KERNEL);
+ if (!skb)
+ return;
+ req = (struct cpl_tid_release *) skb_put(skb, sizeof(*req));
+ req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
+ OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_TID_RELEASE, hwtid));
+ skb->priority = CPL_PRIORITY_SETUP;
+ iwch_cxgb3_ofld_send(tdev, skb);
+ return;
+}
+
+int iwch_quiesce_tid(struct iwch_ep *ep)
+{
+ struct cpl_set_tcb_field *req;
+ struct sk_buff *skb = get_skb(NULL, sizeof(*req), GFP_KERNEL);
+
+ if (!skb)
+ return -ENOMEM;
+ req = (struct cpl_set_tcb_field *) skb_put(skb, sizeof(*req));
+ req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
+ req->wr.wr_lo = htonl(V_WR_TID(ep->hwtid));
+ OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, ep->hwtid));
+ req->reply = 0;
+ req->cpu_idx = 0;
+ req->word = htons(W_TCB_RX_QUIESCE);
+ req->mask = cpu_to_be64(1ULL << S_TCB_RX_QUIESCE);
+ req->val = cpu_to_be64(1 << S_TCB_RX_QUIESCE);
+
+ skb->priority = CPL_PRIORITY_DATA;
+ return iwch_cxgb3_ofld_send(ep->com.tdev, skb);
+}
+
+int iwch_resume_tid(struct iwch_ep *ep)
+{
+ struct cpl_set_tcb_field *req;
+ struct sk_buff *skb = get_skb(NULL, sizeof(*req), GFP_KERNEL);
+
+ if (!skb)
+ return -ENOMEM;
+ req = (struct cpl_set_tcb_field *) skb_put(skb, sizeof(*req));
+ req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
+ req->wr.wr_lo = htonl(V_WR_TID(ep->hwtid));
+ OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, ep->hwtid));
+ req->reply = 0;
+ req->cpu_idx = 0;
+ req->word = htons(W_TCB_RX_QUIESCE);
+ req->mask = cpu_to_be64(1ULL << S_TCB_RX_QUIESCE);
+ req->val = 0;
+
+ skb->priority = CPL_PRIORITY_DATA;
+ return iwch_cxgb3_ofld_send(ep->com.tdev, skb);
+}
+
+static void set_emss(struct iwch_ep *ep, u16 opt)
+{
+ PDBG("%s ep %p opt %u\n", __func__, ep, opt);
+ ep->emss = T3C_DATA(ep->com.tdev)->mtus[G_TCPOPT_MSS(opt)] - 40;
+ if (G_TCPOPT_TSTAMP(opt))
+ ep->emss -= 12;
+ if (ep->emss < 128)
+ ep->emss = 128;
+ PDBG("emss=%d\n", ep->emss);
+}
+
+static enum iwch_ep_state state_read(struct iwch_ep_common *epc)
+{
+ unsigned long flags;
+ enum iwch_ep_state state;
+
+ spin_lock_irqsave(&epc->lock, flags);
+ state = epc->state;
+ spin_unlock_irqrestore(&epc->lock, flags);
+ return state;
+}
+
+static void __state_set(struct iwch_ep_common *epc, enum iwch_ep_state new)
+{
+ epc->state = new;
+}
+
+static void state_set(struct iwch_ep_common *epc, enum iwch_ep_state new)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&epc->lock, flags);
+ PDBG("%s - %s -> %s\n", __func__, states[epc->state], states[new]);
+ __state_set(epc, new);
+ spin_unlock_irqrestore(&epc->lock, flags);
+ return;
+}
+
+static void *alloc_ep(int size, gfp_t gfp)
+{
+ struct iwch_ep_common *epc;
+
+ epc = kzalloc(size, gfp);
+ if (epc) {
+ kref_init(&epc->kref);
+ spin_lock_init(&epc->lock);
+ init_waitqueue_head(&epc->waitq);
+ }
+ PDBG("%s alloc ep %p\n", __func__, epc);
+ return epc;
+}
+
+void __free_ep(struct kref *kref)
+{
+ struct iwch_ep *ep;
+ ep = container_of(container_of(kref, struct iwch_ep_common, kref),
+ struct iwch_ep, com);
+ PDBG("%s ep %p state %s\n", __func__, ep, states[state_read(&ep->com)]);
+ if (test_bit(RELEASE_RESOURCES, &ep->com.flags)) {
+ cxgb3_remove_tid(ep->com.tdev, (void *)ep, ep->hwtid);
+ dst_release(ep->dst);
+ l2t_release(ep->com.tdev, ep->l2t);
+ }
+ kfree(ep);
+}
+
+static void release_ep_resources(struct iwch_ep *ep)
+{
+ PDBG("%s ep %p tid %d\n", __func__, ep, ep->hwtid);
+ set_bit(RELEASE_RESOURCES, &ep->com.flags);
+ put_ep(&ep->com);
+}
+
+static int status2errno(int status)
+{
+ switch (status) {
+ case CPL_ERR_NONE:
+ return 0;
+ case CPL_ERR_CONN_RESET:
+ return -ECONNRESET;
+ 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:
+ return -EADDRINUSE;
+ default:
+ return -EIO;
+ }
+}
+
+/*
+ * Try and reuse skbs already allocated...
+ */
+static struct sk_buff *get_skb(struct sk_buff *skb, int len, gfp_t gfp)
+{
+ if (skb && !skb_is_nonlinear(skb) && !skb_cloned(skb)) {
+ skb_trim(skb, 0);
+ skb_get(skb);
+ } else {
+ skb = alloc_skb(len, gfp);
+ }
+ return skb;
+}
+
+static struct rtable *find_route(struct t3cdev *dev, __be32 local_ip,
+ __be32 peer_ip, __be16 local_port,
+ __be16 peer_port, u8 tos)
+{
+ struct rtable *rt;
+ struct flowi4 fl4;
+
+ rt = ip_route_output_ports(&init_net, &fl4, NULL, peer_ip, local_ip,
+ peer_port, local_port, IPPROTO_TCP,
+ tos, 0);
+ if (IS_ERR(rt))
+ return NULL;
+ return rt;
+}
+
+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 void arp_failure_discard(struct t3cdev *dev, struct sk_buff *skb)
+{
+ PDBG("%s t3cdev %p\n", __func__, dev);
+ kfree_skb(skb);
+}
+
+/*
+ * Handle an ARP failure for an active open.
+ */
+static void act_open_req_arp_failure(struct t3cdev *dev, struct sk_buff *skb)
+{
+ printk(KERN_ERR MOD "ARP failure duing connect\n");
+ kfree_skb(skb);
+}
+
+/*
+ * 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 *dev, struct sk_buff *skb)
+{
+ struct cpl_abort_req *req = cplhdr(skb);
+
+ PDBG("%s t3cdev %p\n", __func__, dev);
+ req->cmd = CPL_ABORT_NO_RST;
+ iwch_cxgb3_ofld_send(dev, skb);
+}
+
+static int send_halfclose(struct iwch_ep *ep, gfp_t gfp)
+{
+ struct cpl_close_con_req *req;
+ struct sk_buff *skb;
+
+ PDBG("%s ep %p\n", __func__, ep);
+ skb = get_skb(NULL, sizeof(*req), gfp);
+ if (!skb) {
+ printk(KERN_ERR MOD "%s - failed to alloc skb\n", __func__);
+ return -ENOMEM;
+ }
+ skb->priority = CPL_PRIORITY_DATA;
+ set_arp_failure_handler(skb, arp_failure_discard);
+ 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(ep->hwtid));
+ OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_CLOSE_CON_REQ, ep->hwtid));
+ return iwch_l2t_send(ep->com.tdev, skb, ep->l2t);
+}
+
+static int send_abort(struct iwch_ep *ep, struct sk_buff *skb, gfp_t gfp)
+{
+ struct cpl_abort_req *req;
+
+ PDBG("%s ep %p\n", __func__, ep);
+ skb = get_skb(skb, sizeof(*req), gfp);
+ if (!skb) {
+ printk(KERN_ERR MOD "%s - failed to alloc skb.\n",
+ __func__);
+ return -ENOMEM;
+ }
+ skb->priority = CPL_PRIORITY_DATA;
+ set_arp_failure_handler(skb, abort_arp_failure);
+ req = (struct cpl_abort_req *) skb_put(skb, sizeof(*req));
+ memset(req, 0, 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(ep->hwtid));
+ OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_ABORT_REQ, ep->hwtid));
+ req->cmd = CPL_ABORT_SEND_RST;
+ return iwch_l2t_send(ep->com.tdev, skb, ep->l2t);
+}
+
+static int send_connect(struct iwch_ep *ep)
+{
+ struct cpl_act_open_req *req;
+ struct sk_buff *skb;
+ u32 opt0h, opt0l, opt2;
+ unsigned int mtu_idx;
+ int wscale;
+
+ PDBG("%s ep %p\n", __func__, ep);
+
+ skb = get_skb(NULL, sizeof(*req), GFP_KERNEL);
+ if (!skb) {
+ printk(KERN_ERR MOD "%s - failed to alloc skb.\n",
+ __func__);
+ return -ENOMEM;
+ }
+ mtu_idx = find_best_mtu(T3C_DATA(ep->com.tdev), dst_mtu(ep->dst));
+ wscale = compute_wscale(rcv_win);
+ opt0h = V_NAGLE(0) |
+ V_NO_CONG(nocong) |
+ V_KEEP_ALIVE(1) |
+ F_TCAM_BYPASS |
+ V_WND_SCALE(wscale) |
+ V_MSS_IDX(mtu_idx) |
+ V_L2T_IDX(ep->l2t->idx) | V_TX_CHANNEL(ep->l2t->smt_idx);
+ opt0l = V_TOS((ep->tos >> 2) & M_TOS) | V_RCV_BUFSIZ(rcv_win>>10);
+ opt2 = F_RX_COALESCE_VALID | V_RX_COALESCE(0) | V_FLAVORS_VALID(1) |
+ V_CONG_CONTROL_FLAVOR(cong_flavor);
+ skb->priority = CPL_PRIORITY_SETUP;
+ set_arp_failure_handler(skb, act_open_req_arp_failure);
+
+ 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, ep->atid));
+ req->local_port = ep->com.local_addr.sin_port;
+ req->peer_port = ep->com.remote_addr.sin_port;
+ req->local_ip = ep->com.local_addr.sin_addr.s_addr;
+ req->peer_ip = ep->com.remote_addr.sin_addr.s_addr;
+ req->opt0h = htonl(opt0h);
+ req->opt0l = htonl(opt0l);
+ req->params = 0;
+ req->opt2 = htonl(opt2);
+ return iwch_l2t_send(ep->com.tdev, skb, ep->l2t);
+}
+
+static void send_mpa_req(struct iwch_ep *ep, struct sk_buff *skb)
+{
+ int mpalen;
+ struct tx_data_wr *req;
+ struct mpa_message *mpa;
+ int len;
+
+ PDBG("%s ep %p pd_len %d\n", __func__, ep, ep->plen);
+
+ BUG_ON(skb_cloned(skb));
+
+ mpalen = sizeof(*mpa) + ep->plen;
+ if (skb->data + mpalen + sizeof(*req) > skb_end_pointer(skb)) {
+ kfree_skb(skb);
+ skb=alloc_skb(mpalen + sizeof(*req), GFP_KERNEL);
+ if (!skb) {
+ connect_reply_upcall(ep, -ENOMEM);
+ return;
+ }
+ }
+ skb_trim(skb, 0);
+ skb_reserve(skb, sizeof(*req));
+ skb_put(skb, mpalen);
+ skb->priority = CPL_PRIORITY_DATA;
+ mpa = (struct mpa_message *) skb->data;
+ memset(mpa, 0, sizeof(*mpa));
+ memcpy(mpa->key, MPA_KEY_REQ, sizeof(mpa->key));
+ mpa->flags = (crc_enabled ? MPA_CRC : 0) |
+ (markers_enabled ? MPA_MARKERS : 0);
+ mpa->private_data_size = htons(ep->plen);
+ mpa->revision = mpa_rev;
+
+ if (ep->plen)
+ memcpy(mpa->private_data, ep->mpa_pkt + sizeof(*mpa), ep->plen);
+
+ /*
+ * Reference the mpa skb. This ensures the data area
+ * will remain in memory until the hw acks the tx.
+ * Function tx_ack() will deref it.
+ */
+ skb_get(skb);
+ set_arp_failure_handler(skb, arp_failure_discard);
+ skb_reset_transport_header(skb);
+ len = skb->len;
+ req = (struct tx_data_wr *) skb_push(skb, sizeof(*req));
+ req->wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_TX_DATA)|F_WR_COMPL);
+ req->wr_lo = htonl(V_WR_TID(ep->hwtid));
+ req->len = htonl(len);
+ req->param = htonl(V_TX_PORT(ep->l2t->smt_idx) |
+ V_TX_SNDBUF(snd_win>>15));
+ req->flags = htonl(F_TX_INIT);
+ req->sndseq = htonl(ep->snd_seq);
+ BUG_ON(ep->mpa_skb);
+ ep->mpa_skb = skb;
+ iwch_l2t_send(ep->com.tdev, skb, ep->l2t);
+ start_ep_timer(ep);
+ state_set(&ep->com, MPA_REQ_SENT);
+ return;
+}
+
+static int send_mpa_reject(struct iwch_ep *ep, const void *pdata, u8 plen)
+{
+ int mpalen;
+ struct tx_data_wr *req;
+ struct mpa_message *mpa;
+ struct sk_buff *skb;
+
+ PDBG("%s ep %p plen %d\n", __func__, ep, plen);
+
+ mpalen = sizeof(*mpa) + plen;
+
+ skb = get_skb(NULL, mpalen + sizeof(*req), GFP_KERNEL);
+ if (!skb) {
+ printk(KERN_ERR MOD "%s - cannot alloc skb!\n", __func__);
+ return -ENOMEM;
+ }
+ skb_reserve(skb, sizeof(*req));
+ mpa = (struct mpa_message *) skb_put(skb, mpalen);
+ memset(mpa, 0, sizeof(*mpa));
+ memcpy(mpa->key, MPA_KEY_REP, sizeof(mpa->key));
+ mpa->flags = MPA_REJECT;
+ mpa->revision = mpa_rev;
+ mpa->private_data_size = htons(plen);
+ if (plen)
+ memcpy(mpa->private_data, pdata, plen);
+
+ /*
+ * Reference the mpa skb again. This ensures the data area
+ * will remain in memory until the hw acks the tx.
+ * Function tx_ack() will deref it.
+ */
+ skb_get(skb);
+ skb->priority = CPL_PRIORITY_DATA;
+ set_arp_failure_handler(skb, arp_failure_discard);
+ 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)|F_WR_COMPL);
+ req->wr_lo = htonl(V_WR_TID(ep->hwtid));
+ req->len = htonl(mpalen);
+ req->param = htonl(V_TX_PORT(ep->l2t->smt_idx) |
+ V_TX_SNDBUF(snd_win>>15));
+ req->flags = htonl(F_TX_INIT);
+ req->sndseq = htonl(ep->snd_seq);
+ BUG_ON(ep->mpa_skb);
+ ep->mpa_skb = skb;
+ return iwch_l2t_send(ep->com.tdev, skb, ep->l2t);
+}
+
+static int send_mpa_reply(struct iwch_ep *ep, const void *pdata, u8 plen)
+{
+ int mpalen;
+ struct tx_data_wr *req;
+ struct mpa_message *mpa;
+ int len;
+ struct sk_buff *skb;
+
+ PDBG("%s ep %p plen %d\n", __func__, ep, plen);
+
+ mpalen = sizeof(*mpa) + plen;
+
+ skb = get_skb(NULL, mpalen + sizeof(*req), GFP_KERNEL);
+ if (!skb) {
+ printk(KERN_ERR MOD "%s - cannot alloc skb!\n", __func__);
+ return -ENOMEM;
+ }
+ skb->priority = CPL_PRIORITY_DATA;
+ skb_reserve(skb, sizeof(*req));
+ mpa = (struct mpa_message *) skb_put(skb, mpalen);
+ memset(mpa, 0, sizeof(*mpa));
+ memcpy(mpa->key, MPA_KEY_REP, sizeof(mpa->key));
+ mpa->flags = (ep->mpa_attr.crc_enabled ? MPA_CRC : 0) |
+ (markers_enabled ? MPA_MARKERS : 0);
+ mpa->revision = mpa_rev;
+ mpa->private_data_size = htons(plen);
+ if (plen)
+ memcpy(mpa->private_data, pdata, plen);
+
+ /*
+ * Reference the mpa skb. This ensures the data area
+ * will remain in memory until the hw acks the tx.
+ * Function tx_ack() will deref it.
+ */
+ skb_get(skb);
+ set_arp_failure_handler(skb, arp_failure_discard);
+ skb_reset_transport_header(skb);
+ len = skb->len;
+ req = (struct tx_data_wr *) skb_push(skb, sizeof(*req));
+ req->wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_TX_DATA)|F_WR_COMPL);
+ req->wr_lo = htonl(V_WR_TID(ep->hwtid));
+ req->len = htonl(len);
+ req->param = htonl(V_TX_PORT(ep->l2t->smt_idx) |
+ V_TX_SNDBUF(snd_win>>15));
+ req->flags = htonl(F_TX_INIT);
+ req->sndseq = htonl(ep->snd_seq);
+ ep->mpa_skb = skb;
+ state_set(&ep->com, MPA_REP_SENT);
+ return iwch_l2t_send(ep->com.tdev, skb, ep->l2t);
+}
+
+static int act_establish(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
+{
+ struct iwch_ep *ep = ctx;
+ struct cpl_act_establish *req = cplhdr(skb);
+ unsigned int tid = GET_TID(req);
+
+ PDBG("%s ep %p tid %d\n", __func__, ep, tid);
+
+ dst_confirm(ep->dst);
+
+ /* setup the hwtid for this connection */
+ ep->hwtid = tid;
+ cxgb3_insert_tid(ep->com.tdev, &t3c_client, ep, tid);
+
+ ep->snd_seq = ntohl(req->snd_isn);
+ ep->rcv_seq = ntohl(req->rcv_isn);
+
+ set_emss(ep, ntohs(req->tcp_opt));
+
+ /* dealloc the atid */
+ cxgb3_free_atid(ep->com.tdev, ep->atid);
+
+ /* start MPA negotiation */
+ send_mpa_req(ep, skb);
+
+ return 0;
+}
+
+static void abort_connection(struct iwch_ep *ep, struct sk_buff *skb, gfp_t gfp)
+{
+ PDBG("%s ep %p\n", __FILE__, ep);
+ state_set(&ep->com, ABORTING);
+ send_abort(ep, skb, gfp);
+}
+
+static void close_complete_upcall(struct iwch_ep *ep)
+{
+ struct iw_cm_event event;
+
+ PDBG("%s ep %p\n", __func__, ep);
+ memset(&event, 0, sizeof(event));
+ event.event = IW_CM_EVENT_CLOSE;
+ if (ep->com.cm_id) {
+ PDBG("close complete delivered ep %p cm_id %p tid %d\n",
+ ep, ep->com.cm_id, ep->hwtid);
+ ep->com.cm_id->event_handler(ep->com.cm_id, &event);
+ ep->com.cm_id->rem_ref(ep->com.cm_id);
+ ep->com.cm_id = NULL;
+ ep->com.qp = NULL;
+ }
+}
+
+static void peer_close_upcall(struct iwch_ep *ep)
+{
+ struct iw_cm_event event;
+
+ PDBG("%s ep %p\n", __func__, ep);
+ memset(&event, 0, sizeof(event));
+ event.event = IW_CM_EVENT_DISCONNECT;
+ if (ep->com.cm_id) {
+ PDBG("peer close delivered ep %p cm_id %p tid %d\n",
+ ep, ep->com.cm_id, ep->hwtid);
+ ep->com.cm_id->event_handler(ep->com.cm_id, &event);
+ }
+}
+
+static void peer_abort_upcall(struct iwch_ep *ep)
+{
+ struct iw_cm_event event;
+
+ PDBG("%s ep %p\n", __func__, ep);
+ memset(&event, 0, sizeof(event));
+ event.event = IW_CM_EVENT_CLOSE;
+ event.status = -ECONNRESET;
+ if (ep->com.cm_id) {
+ PDBG("abort delivered ep %p cm_id %p tid %d\n", ep,
+ ep->com.cm_id, ep->hwtid);
+ ep->com.cm_id->event_handler(ep->com.cm_id, &event);
+ ep->com.cm_id->rem_ref(ep->com.cm_id);
+ ep->com.cm_id = NULL;
+ ep->com.qp = NULL;
+ }
+}
+
+static void connect_reply_upcall(struct iwch_ep *ep, int status)
+{
+ struct iw_cm_event event;
+
+ PDBG("%s ep %p status %d\n", __func__, ep, status);
+ memset(&event, 0, sizeof(event));
+ event.event = IW_CM_EVENT_CONNECT_REPLY;
+ event.status = status;
+ memcpy(&event.local_addr, &ep->com.local_addr,
+ sizeof(ep->com.local_addr));
+ memcpy(&event.remote_addr, &ep->com.remote_addr,
+ sizeof(ep->com.remote_addr));
+
+ if ((status == 0) || (status == -ECONNREFUSED)) {
+ event.private_data_len = ep->plen;
+ event.private_data = ep->mpa_pkt + sizeof(struct mpa_message);
+ }
+ if (ep->com.cm_id) {
+ PDBG("%s ep %p tid %d status %d\n", __func__, ep,
+ ep->hwtid, status);
+ ep->com.cm_id->event_handler(ep->com.cm_id, &event);
+ }
+ if (status < 0) {
+ ep->com.cm_id->rem_ref(ep->com.cm_id);
+ ep->com.cm_id = NULL;
+ ep->com.qp = NULL;
+ }
+}
+
+static void connect_request_upcall(struct iwch_ep *ep)
+{
+ struct iw_cm_event event;
+
+ PDBG("%s ep %p tid %d\n", __func__, ep, ep->hwtid);
+ memset(&event, 0, sizeof(event));
+ event.event = IW_CM_EVENT_CONNECT_REQUEST;
+ memcpy(&event.local_addr, &ep->com.local_addr,
+ sizeof(ep->com.local_addr));
+ memcpy(&event.remote_addr, &ep->com.remote_addr,
+ sizeof(ep->com.local_addr));
+ event.private_data_len = ep->plen;
+ event.private_data = ep->mpa_pkt + sizeof(struct mpa_message);
+ event.provider_data = ep;
+ /*
+ * Until ird/ord negotiation via MPAv2 support is added, send max
+ * supported values
+ */
+ event.ird = event.ord = 8;
+ if (state_read(&ep->parent_ep->com) != DEAD) {
+ get_ep(&ep->com);
+ ep->parent_ep->com.cm_id->event_handler(
+ ep->parent_ep->com.cm_id,
+ &event);
+ }
+ put_ep(&ep->parent_ep->com);
+ ep->parent_ep = NULL;
+}
+
+static void established_upcall(struct iwch_ep *ep)
+{
+ struct iw_cm_event event;
+
+ PDBG("%s ep %p\n", __func__, ep);
+ memset(&event, 0, sizeof(event));
+ event.event = IW_CM_EVENT_ESTABLISHED;
+ /*
+ * Until ird/ord negotiation via MPAv2 support is added, send max
+ * supported values
+ */
+ event.ird = event.ord = 8;
+ if (ep->com.cm_id) {
+ PDBG("%s ep %p tid %d\n", __func__, ep, ep->hwtid);
+ ep->com.cm_id->event_handler(ep->com.cm_id, &event);
+ }
+}
+
+static int update_rx_credits(struct iwch_ep *ep, u32 credits)
+{
+ struct cpl_rx_data_ack *req;
+ struct sk_buff *skb;
+
+ PDBG("%s ep %p credits %u\n", __func__, ep, credits);
+ skb = get_skb(NULL, sizeof(*req), GFP_KERNEL);
+ if (!skb) {
+ printk(KERN_ERR MOD "update_rx_credits - cannot alloc skb!\n");
+ 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, ep->hwtid));
+ req->credit_dack = htonl(V_RX_CREDITS(credits) | V_RX_FORCE_ACK(1));
+ skb->priority = CPL_PRIORITY_ACK;
+ iwch_cxgb3_ofld_send(ep->com.tdev, skb);
+ return credits;
+}
+
+static void process_mpa_reply(struct iwch_ep *ep, struct sk_buff *skb)
+{
+ struct mpa_message *mpa;
+ u16 plen;
+ struct iwch_qp_attributes attrs;
+ enum iwch_qp_attr_mask mask;
+ int err;
+
+ PDBG("%s ep %p\n", __func__, ep);
+
+ /*
+ * Stop mpa timer. If it expired, then the state has
+ * changed and we bail since ep_timeout already aborted
+ * the connection.
+ */
+ stop_ep_timer(ep);
+ if (state_read(&ep->com) != MPA_REQ_SENT)
+ return;
+
+ /*
+ * If we get more than the supported amount of private data
+ * then we must fail this connection.
+ */
+ if (ep->mpa_pkt_len + skb->len > sizeof(ep->mpa_pkt)) {
+ err = -EINVAL;
+ goto err;
+ }
+
+ /*
+ * copy the new data into our accumulation buffer.
+ */
+ skb_copy_from_linear_data(skb, &(ep->mpa_pkt[ep->mpa_pkt_len]),
+ skb->len);
+ ep->mpa_pkt_len += skb->len;
+
+ /*
+ * if we don't even have the mpa message, then bail.
+ */
+ if (ep->mpa_pkt_len < sizeof(*mpa))
+ return;
+ mpa = (struct mpa_message *) ep->mpa_pkt;
+
+ /* Validate MPA header. */
+ if (mpa->revision != mpa_rev) {
+ err = -EPROTO;
+ goto err;
+ }
+ if (memcmp(mpa->key, MPA_KEY_REP, sizeof(mpa->key))) {
+ err = -EPROTO;
+ goto err;
+ }
+
+ plen = ntohs(mpa->private_data_size);
+
+ /*
+ * Fail if there's too much private data.
+ */
+ if (plen > MPA_MAX_PRIVATE_DATA) {
+ err = -EPROTO;
+ goto err;
+ }
+
+ /*
+ * If plen does not account for pkt size
+ */
+ if (ep->mpa_pkt_len > (sizeof(*mpa) + plen)) {
+ err = -EPROTO;
+ goto err;
+ }
+
+ ep->plen = (u8) plen;
+
+ /*
+ * If we don't have all the pdata yet, then bail.
+ * We'll continue process when more data arrives.
+ */
+ if (ep->mpa_pkt_len < (sizeof(*mpa) + plen))
+ return;
+
+ if (mpa->flags & MPA_REJECT) {
+ err = -ECONNREFUSED;
+ goto err;
+ }
+
+ /*
+ * If we get here we have accumulated the entire mpa
+ * start reply message including private data. And
+ * the MPA header is valid.
+ */
+ state_set(&ep->com, FPDU_MODE);
+ ep->mpa_attr.initiator = 1;
+ ep->mpa_attr.crc_enabled = (mpa->flags & MPA_CRC) | crc_enabled ? 1 : 0;
+ ep->mpa_attr.recv_marker_enabled = markers_enabled;
+ ep->mpa_attr.xmit_marker_enabled = mpa->flags & MPA_MARKERS ? 1 : 0;
+ ep->mpa_attr.version = mpa_rev;
+ PDBG("%s - crc_enabled=%d, recv_marker_enabled=%d, "
+ "xmit_marker_enabled=%d, version=%d\n", __func__,
+ ep->mpa_attr.crc_enabled, ep->mpa_attr.recv_marker_enabled,
+ ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version);
+
+ attrs.mpa_attr = ep->mpa_attr;
+ attrs.max_ird = ep->ird;
+ attrs.max_ord = ep->ord;
+ attrs.llp_stream_handle = ep;
+ attrs.next_state = IWCH_QP_STATE_RTS;
+
+ mask = IWCH_QP_ATTR_NEXT_STATE |
+ IWCH_QP_ATTR_LLP_STREAM_HANDLE | IWCH_QP_ATTR_MPA_ATTR |
+ IWCH_QP_ATTR_MAX_IRD | IWCH_QP_ATTR_MAX_ORD;
+
+ /* bind QP and TID with INIT_WR */
+ err = iwch_modify_qp(ep->com.qp->rhp,
+ ep->com.qp, mask, &attrs, 1);
+ if (err)
+ goto err;
+
+ if (peer2peer && iwch_rqes_posted(ep->com.qp) == 0) {
+ iwch_post_zb_read(ep);
+ }
+
+ goto out;
+err:
+ abort_connection(ep, skb, GFP_KERNEL);
+out:
+ connect_reply_upcall(ep, err);
+ return;
+}
+
+static void process_mpa_request(struct iwch_ep *ep, struct sk_buff *skb)
+{
+ struct mpa_message *mpa;
+ u16 plen;
+
+ PDBG("%s ep %p\n", __func__, ep);
+
+ /*
+ * Stop mpa timer. If it expired, then the state has
+ * changed and we bail since ep_timeout already aborted
+ * the connection.
+ */
+ stop_ep_timer(ep);
+ if (state_read(&ep->com) != MPA_REQ_WAIT)
+ return;
+
+ /*
+ * If we get more than the supported amount of private data
+ * then we must fail this connection.
+ */
+ if (ep->mpa_pkt_len + skb->len > sizeof(ep->mpa_pkt)) {
+ abort_connection(ep, skb, GFP_KERNEL);
+ return;
+ }
+
+ PDBG("%s enter (%s line %u)\n", __func__, __FILE__, __LINE__);
+
+ /*
+ * Copy the new data into our accumulation buffer.
+ */
+ skb_copy_from_linear_data(skb, &(ep->mpa_pkt[ep->mpa_pkt_len]),
+ skb->len);
+ ep->mpa_pkt_len += skb->len;
+
+ /*
+ * If we don't even have the mpa message, then bail.
+ * We'll continue process when more data arrives.
+ */
+ if (ep->mpa_pkt_len < sizeof(*mpa))
+ return;
+ PDBG("%s enter (%s line %u)\n", __func__, __FILE__, __LINE__);
+ mpa = (struct mpa_message *) ep->mpa_pkt;
+
+ /*
+ * Validate MPA Header.
+ */
+ if (mpa->revision != mpa_rev) {
+ abort_connection(ep, skb, GFP_KERNEL);
+ return;
+ }
+
+ if (memcmp(mpa->key, MPA_KEY_REQ, sizeof(mpa->key))) {
+ abort_connection(ep, skb, GFP_KERNEL);
+ return;
+ }
+
+ plen = ntohs(mpa->private_data_size);
+
+ /*
+ * Fail if there's too much private data.
+ */
+ if (plen > MPA_MAX_PRIVATE_DATA) {
+ abort_connection(ep, skb, GFP_KERNEL);
+ return;
+ }
+
+ /*
+ * If plen does not account for pkt size
+ */
+ if (ep->mpa_pkt_len > (sizeof(*mpa) + plen)) {
+ abort_connection(ep, skb, GFP_KERNEL);
+ return;
+ }
+ ep->plen = (u8) plen;
+
+ /*
+ * If we don't have all the pdata yet, then bail.
+ */
+ if (ep->mpa_pkt_len < (sizeof(*mpa) + plen))
+ return;
+
+ /*
+ * If we get here we have accumulated the entire mpa
+ * start reply message including private data.
+ */
+ ep->mpa_attr.initiator = 0;
+ ep->mpa_attr.crc_enabled = (mpa->flags & MPA_CRC) | crc_enabled ? 1 : 0;
+ ep->mpa_attr.recv_marker_enabled = markers_enabled;
+ ep->mpa_attr.xmit_marker_enabled = mpa->flags & MPA_MARKERS ? 1 : 0;
+ ep->mpa_attr.version = mpa_rev;
+ PDBG("%s - crc_enabled=%d, recv_marker_enabled=%d, "
+ "xmit_marker_enabled=%d, version=%d\n", __func__,
+ ep->mpa_attr.crc_enabled, ep->mpa_attr.recv_marker_enabled,
+ ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version);
+
+ state_set(&ep->com, MPA_REQ_RCVD);
+
+ /* drive upcall */
+ connect_request_upcall(ep);
+ return;
+}
+
+static int rx_data(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
+{
+ struct iwch_ep *ep = ctx;
+ struct cpl_rx_data *hdr = cplhdr(skb);
+ unsigned int dlen = ntohs(hdr->len);
+
+ PDBG("%s ep %p dlen %u\n", __func__, ep, dlen);
+
+ skb_pull(skb, sizeof(*hdr));
+ skb_trim(skb, dlen);
+
+ ep->rcv_seq += dlen;
+ BUG_ON(ep->rcv_seq != (ntohl(hdr->seq) + dlen));
+
+ switch (state_read(&ep->com)) {
+ case MPA_REQ_SENT:
+ process_mpa_reply(ep, skb);
+ break;
+ case MPA_REQ_WAIT:
+ process_mpa_request(ep, skb);
+ break;
+ case MPA_REP_SENT:
+ break;
+ default:
+ printk(KERN_ERR MOD "%s Unexpected streaming data."
+ " ep %p state %d tid %d\n",
+ __func__, ep, state_read(&ep->com), ep->hwtid);
+
+ /*
+ * The ep will timeout and inform the ULP of the failure.
+ * See ep_timeout().
+ */
+ break;
+ }
+
+ /* update RX credits */
+ update_rx_credits(ep, dlen);
+
+ return CPL_RET_BUF_DONE;
+}
+
+/*
+ * Upcall from the adapter indicating data has been transmitted.
+ * For us its just the single MPA request or reply. We can now free
+ * the skb holding the mpa message.
+ */
+static int tx_ack(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
+{
+ struct iwch_ep *ep = ctx;
+ struct cpl_wr_ack *hdr = cplhdr(skb);
+ unsigned int credits = ntohs(hdr->credits);
+ unsigned long flags;
+ int post_zb = 0;
+
+ PDBG("%s ep %p credits %u\n", __func__, ep, credits);
+
+ if (credits == 0) {
+ PDBG("%s 0 credit ack ep %p state %u\n",
+ __func__, ep, state_read(&ep->com));
+ return CPL_RET_BUF_DONE;
+ }
+
+ spin_lock_irqsave(&ep->com.lock, flags);
+ BUG_ON(credits != 1);
+ dst_confirm(ep->dst);
+ if (!ep->mpa_skb) {
+ PDBG("%s rdma_init wr_ack ep %p state %u\n",
+ __func__, ep, ep->com.state);
+ if (ep->mpa_attr.initiator) {
+ PDBG("%s initiator ep %p state %u\n",
+ __func__, ep, ep->com.state);
+ if (peer2peer && ep->com.state == FPDU_MODE)
+ post_zb = 1;
+ } else {
+ PDBG("%s responder ep %p state %u\n",
+ __func__, ep, ep->com.state);
+ if (ep->com.state == MPA_REQ_RCVD) {
+ ep->com.rpl_done = 1;
+ wake_up(&ep->com.waitq);
+ }
+ }
+ } else {
+ PDBG("%s lsm ack ep %p state %u freeing skb\n",
+ __func__, ep, ep->com.state);
+ kfree_skb(ep->mpa_skb);
+ ep->mpa_skb = NULL;
+ }
+ spin_unlock_irqrestore(&ep->com.lock, flags);
+ if (post_zb)
+ iwch_post_zb_read(ep);
+ return CPL_RET_BUF_DONE;
+}
+
+static int abort_rpl(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
+{
+ struct iwch_ep *ep = ctx;
+ unsigned long flags;
+ int release = 0;
+
+ PDBG("%s ep %p\n", __func__, ep);
+ BUG_ON(!ep);
+
+ /*
+ * We get 2 abort replies from the HW. The first one must
+ * be ignored except for scribbling that we need one more.
+ */
+ if (!test_and_set_bit(ABORT_REQ_IN_PROGRESS, &ep->com.flags)) {
+ return CPL_RET_BUF_DONE;
+ }
+
+ spin_lock_irqsave(&ep->com.lock, flags);
+ switch (ep->com.state) {
+ case ABORTING:
+ close_complete_upcall(ep);
+ __state_set(&ep->com, DEAD);
+ release = 1;
+ break;
+ default:
+ printk(KERN_ERR "%s ep %p state %d\n",
+ __func__, ep, ep->com.state);
+ break;
+ }
+ spin_unlock_irqrestore(&ep->com.lock, flags);
+
+ if (release)
+ release_ep_resources(ep);
+ return CPL_RET_BUF_DONE;
+}
+
+/*
+ * 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;
+}
+
+static int act_open_rpl(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
+{
+ struct iwch_ep *ep = ctx;
+ struct cpl_act_open_rpl *rpl = cplhdr(skb);
+
+ PDBG("%s ep %p status %u errno %d\n", __func__, ep, rpl->status,
+ status2errno(rpl->status));
+ connect_reply_upcall(ep, status2errno(rpl->status));
+ state_set(&ep->com, DEAD);
+ if (ep->com.tdev->type != T3A && act_open_has_tid(rpl->status))
+ release_tid(ep->com.tdev, GET_TID(rpl), NULL);
+ cxgb3_free_atid(ep->com.tdev, ep->atid);
+ dst_release(ep->dst);
+ l2t_release(ep->com.tdev, ep->l2t);
+ put_ep(&ep->com);
+ return CPL_RET_BUF_DONE;
+}
+
+static int listen_start(struct iwch_listen_ep *ep)
+{
+ struct sk_buff *skb;
+ struct cpl_pass_open_req *req;
+
+ PDBG("%s ep %p\n", __func__, ep);
+ skb = get_skb(NULL, sizeof(*req), GFP_KERNEL);
+ if (!skb) {
+ printk(KERN_ERR MOD "t3c_listen_start failed to alloc skb!\n");
+ return -ENOMEM;
+ }
+
+ req = (struct cpl_pass_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_PASS_OPEN_REQ, ep->stid));
+ req->local_port = ep->com.local_addr.sin_port;
+ req->local_ip = ep->com.local_addr.sin_addr.s_addr;
+ req->peer_port = 0;
+ req->peer_ip = 0;
+ req->peer_netmask = 0;
+ req->opt0h = htonl(F_DELACK | F_TCAM_BYPASS);
+ req->opt0l = htonl(V_RCV_BUFSIZ(rcv_win>>10));
+ req->opt1 = htonl(V_CONN_POLICY(CPL_CONN_POLICY_ASK));
+
+ skb->priority = 1;
+ return iwch_cxgb3_ofld_send(ep->com.tdev, skb);
+}
+
+static int pass_open_rpl(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
+{
+ struct iwch_listen_ep *ep = ctx;
+ struct cpl_pass_open_rpl *rpl = cplhdr(skb);
+
+ PDBG("%s ep %p status %d error %d\n", __func__, ep,
+ rpl->status, status2errno(rpl->status));
+ ep->com.rpl_err = status2errno(rpl->status);
+ ep->com.rpl_done = 1;
+ wake_up(&ep->com.waitq);
+
+ return CPL_RET_BUF_DONE;
+}
+
+static int listen_stop(struct iwch_listen_ep *ep)
+{
+ struct sk_buff *skb;
+ struct cpl_close_listserv_req *req;
+
+ PDBG("%s ep %p\n", __func__, ep);
+ skb = get_skb(NULL, sizeof(*req), GFP_KERNEL);
+ if (!skb) {
+ printk(KERN_ERR MOD "%s - failed to alloc skb\n", __func__);
+ return -ENOMEM;
+ }
+ req = (struct cpl_close_listserv_req *) skb_put(skb, sizeof(*req));
+ req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
+ req->cpu_idx = 0;
+ OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_CLOSE_LISTSRV_REQ, ep->stid));
+ skb->priority = 1;
+ return iwch_cxgb3_ofld_send(ep->com.tdev, skb);
+}
+
+static int close_listsrv_rpl(struct t3cdev *tdev, struct sk_buff *skb,
+ void *ctx)
+{
+ struct iwch_listen_ep *ep = ctx;
+ struct cpl_close_listserv_rpl *rpl = cplhdr(skb);
+
+ PDBG("%s ep %p\n", __func__, ep);
+ ep->com.rpl_err = status2errno(rpl->status);
+ ep->com.rpl_done = 1;
+ wake_up(&ep->com.waitq);
+ return CPL_RET_BUF_DONE;
+}
+
+static void accept_cr(struct iwch_ep *ep, __be32 peer_ip, struct sk_buff *skb)
+{
+ struct cpl_pass_accept_rpl *rpl;
+ unsigned int mtu_idx;
+ u32 opt0h, opt0l, opt2;
+ int wscale;
+
+ PDBG("%s ep %p\n", __func__, ep);
+ BUG_ON(skb_cloned(skb));
+ skb_trim(skb, sizeof(*rpl));
+ skb_get(skb);
+ mtu_idx = find_best_mtu(T3C_DATA(ep->com.tdev), dst_mtu(ep->dst));
+ wscale = compute_wscale(rcv_win);
+ opt0h = V_NAGLE(0) |
+ V_NO_CONG(nocong) |
+ V_KEEP_ALIVE(1) |
+ F_TCAM_BYPASS |
+ V_WND_SCALE(wscale) |
+ V_MSS_IDX(mtu_idx) |
+ V_L2T_IDX(ep->l2t->idx) | V_TX_CHANNEL(ep->l2t->smt_idx);
+ opt0l = V_TOS((ep->tos >> 2) & M_TOS) | V_RCV_BUFSIZ(rcv_win>>10);
+ opt2 = F_RX_COALESCE_VALID | V_RX_COALESCE(0) | V_FLAVORS_VALID(1) |
+ V_CONG_CONTROL_FLAVOR(cong_flavor);
+
+ rpl = cplhdr(skb);
+ rpl->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
+ OPCODE_TID(rpl) = htonl(MK_OPCODE_TID(CPL_PASS_ACCEPT_RPL, ep->hwtid));
+ rpl->peer_ip = peer_ip;
+ rpl->opt0h = htonl(opt0h);
+ rpl->opt0l_status = htonl(opt0l | CPL_PASS_OPEN_ACCEPT);
+ rpl->opt2 = htonl(opt2);
+ rpl->rsvd = rpl->opt2; /* workaround for HW bug */
+ skb->priority = CPL_PRIORITY_SETUP;
+ iwch_l2t_send(ep->com.tdev, skb, ep->l2t);
+
+ return;
+}
+
+static void reject_cr(struct t3cdev *tdev, u32 hwtid, __be32 peer_ip,
+ struct sk_buff *skb)
+{
+ PDBG("%s t3cdev %p tid %u peer_ip %x\n", __func__, tdev, hwtid,
+ peer_ip);
+ BUG_ON(skb_cloned(skb));
+ skb_trim(skb, sizeof(struct cpl_tid_release));
+ skb_get(skb);
+
+ if (tdev->type != T3A)
+ release_tid(tdev, hwtid, skb);
+ else {
+ struct cpl_pass_accept_rpl *rpl;
+
+ rpl = cplhdr(skb);
+ skb->priority = CPL_PRIORITY_SETUP;
+ rpl->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
+ OPCODE_TID(rpl) = htonl(MK_OPCODE_TID(CPL_PASS_ACCEPT_RPL,
+ hwtid));
+ rpl->peer_ip = peer_ip;
+ rpl->opt0h = htonl(F_TCAM_BYPASS);
+ rpl->opt0l_status = htonl(CPL_PASS_OPEN_REJECT);
+ rpl->opt2 = 0;
+ rpl->rsvd = rpl->opt2;
+ iwch_cxgb3_ofld_send(tdev, skb);
+ }
+}
+
+static int pass_accept_req(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
+{
+ struct iwch_ep *child_ep, *parent_ep = ctx;
+ struct cpl_pass_accept_req *req = cplhdr(skb);
+ unsigned int hwtid = GET_TID(req);
+ struct dst_entry *dst;
+ struct l2t_entry *l2t;
+ struct rtable *rt;
+ struct iff_mac tim;
+
+ PDBG("%s parent ep %p tid %u\n", __func__, parent_ep, hwtid);
+
+ if (state_read(&parent_ep->com) != LISTEN) {
+ printk(KERN_ERR "%s - listening ep not in LISTEN\n",
+ __func__);
+ goto reject;
+ }
+
+ /*
+ * Find the netdev for this connection request.
+ */
+ tim.mac_addr = req->dst_mac;
+ tim.vlan_tag = ntohs(req->vlan_tag);
+ if (tdev->ctl(tdev, GET_IFF_FROM_MAC, &tim) < 0 || !tim.dev) {
+ printk(KERN_ERR "%s bad dst mac %pM\n",
+ __func__, req->dst_mac);
+ goto reject;
+ }
+
+ /* Find output route */
+ rt = find_route(tdev,
+ req->local_ip,
+ req->peer_ip,
+ req->local_port,
+ req->peer_port, G_PASS_OPEN_TOS(ntohl(req->tos_tid)));
+ if (!rt) {
+ printk(KERN_ERR MOD "%s - failed to find dst entry!\n",
+ __func__);
+ goto reject;
+ }
+ dst = &rt->dst;
+ l2t = t3_l2t_get(tdev, dst, NULL, &req->peer_ip);
+ if (!l2t) {
+ printk(KERN_ERR MOD "%s - failed to allocate l2t entry!\n",
+ __func__);
+ dst_release(dst);
+ goto reject;
+ }
+ child_ep = alloc_ep(sizeof(*child_ep), GFP_KERNEL);
+ if (!child_ep) {
+ printk(KERN_ERR MOD "%s - failed to allocate ep entry!\n",
+ __func__);
+ l2t_release(tdev, l2t);
+ dst_release(dst);
+ goto reject;
+ }
+ state_set(&child_ep->com, CONNECTING);
+ child_ep->com.tdev = tdev;
+ child_ep->com.cm_id = NULL;
+ child_ep->com.local_addr.sin_family = PF_INET;
+ child_ep->com.local_addr.sin_port = req->local_port;
+ child_ep->com.local_addr.sin_addr.s_addr = req->local_ip;
+ child_ep->com.remote_addr.sin_family = PF_INET;
+ child_ep->com.remote_addr.sin_port = req->peer_port;
+ child_ep->com.remote_addr.sin_addr.s_addr = req->peer_ip;
+ get_ep(&parent_ep->com);
+ child_ep->parent_ep = parent_ep;
+ child_ep->tos = G_PASS_OPEN_TOS(ntohl(req->tos_tid));
+ child_ep->l2t = l2t;
+ child_ep->dst = dst;
+ child_ep->hwtid = hwtid;
+ init_timer(&child_ep->timer);
+ cxgb3_insert_tid(tdev, &t3c_client, child_ep, hwtid);
+ accept_cr(child_ep, req->peer_ip, skb);
+ goto out;
+reject:
+ reject_cr(tdev, hwtid, req->peer_ip, skb);
+out:
+ return CPL_RET_BUF_DONE;
+}
+
+static int pass_establish(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
+{
+ struct iwch_ep *ep = ctx;
+ struct cpl_pass_establish *req = cplhdr(skb);
+
+ PDBG("%s ep %p\n", __func__, ep);
+ ep->snd_seq = ntohl(req->snd_isn);
+ ep->rcv_seq = ntohl(req->rcv_isn);
+
+ set_emss(ep, ntohs(req->tcp_opt));
+
+ dst_confirm(ep->dst);
+ state_set(&ep->com, MPA_REQ_WAIT);
+ start_ep_timer(ep);
+
+ return CPL_RET_BUF_DONE;
+}
+
+static int peer_close(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
+{
+ struct iwch_ep *ep = ctx;
+ struct iwch_qp_attributes attrs;
+ unsigned long flags;
+ int disconnect = 1;
+ int release = 0;
+
+ PDBG("%s ep %p\n", __func__, ep);
+ dst_confirm(ep->dst);
+
+ spin_lock_irqsave(&ep->com.lock, flags);
+ switch (ep->com.state) {
+ case MPA_REQ_WAIT:
+ __state_set(&ep->com, CLOSING);
+ break;
+ case MPA_REQ_SENT:
+ __state_set(&ep->com, CLOSING);
+ connect_reply_upcall(ep, -ECONNRESET);
+ break;
+ case MPA_REQ_RCVD:
+
+ /*
+ * We're gonna mark this puppy DEAD, but keep
+ * the reference on it until the ULP accepts or
+ * rejects the CR. Also wake up anyone waiting
+ * in rdma connection migration (see iwch_accept_cr()).
+ */
+ __state_set(&ep->com, CLOSING);
+ ep->com.rpl_done = 1;
+ ep->com.rpl_err = -ECONNRESET;
+ PDBG("waking up ep %p\n", ep);
+ wake_up(&ep->com.waitq);
+ break;
+ case MPA_REP_SENT:
+ __state_set(&ep->com, CLOSING);
+ ep->com.rpl_done = 1;
+ ep->com.rpl_err = -ECONNRESET;
+ PDBG("waking up ep %p\n", ep);
+ wake_up(&ep->com.waitq);
+ break;
+ case FPDU_MODE:
+ start_ep_timer(ep);
+ __state_set(&ep->com, CLOSING);
+ attrs.next_state = IWCH_QP_STATE_CLOSING;
+ iwch_modify_qp(ep->com.qp->rhp, ep->com.qp,
+ IWCH_QP_ATTR_NEXT_STATE, &attrs, 1);
+ peer_close_upcall(ep);
+ break;
+ case ABORTING:
+ disconnect = 0;
+ break;
+ case CLOSING:
+ __state_set(&ep->com, MORIBUND);
+ disconnect = 0;
+ break;
+ case MORIBUND:
+ stop_ep_timer(ep);
+ if (ep->com.cm_id && ep->com.qp) {
+ attrs.next_state = IWCH_QP_STATE_IDLE;
+ iwch_modify_qp(ep->com.qp->rhp, ep->com.qp,
+ IWCH_QP_ATTR_NEXT_STATE, &attrs, 1);
+ }
+ close_complete_upcall(ep);
+ __state_set(&ep->com, DEAD);
+ release = 1;
+ disconnect = 0;
+ break;
+ case DEAD:
+ disconnect = 0;
+ break;
+ default:
+ BUG_ON(1);
+ }
+ spin_unlock_irqrestore(&ep->com.lock, flags);
+ if (disconnect)
+ iwch_ep_disconnect(ep, 0, GFP_KERNEL);
+ if (release)
+ release_ep_resources(ep);
+ return CPL_RET_BUF_DONE;
+}
+
+/*
+ * Returns whether an ABORT_REQ_RSS message is a negative advice.
+ */
+static int is_neg_adv_abort(unsigned int status)
+{
+ return status == CPL_ERR_RTX_NEG_ADVICE ||
+ status == CPL_ERR_PERSIST_NEG_ADVICE;
+}
+
+static int peer_abort(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
+{
+ struct cpl_abort_req_rss *req = cplhdr(skb);
+ struct iwch_ep *ep = ctx;
+ struct cpl_abort_rpl *rpl;
+ struct sk_buff *rpl_skb;
+ struct iwch_qp_attributes attrs;
+ int ret;
+ int release = 0;
+ unsigned long flags;
+
+ if (is_neg_adv_abort(req->status)) {
+ PDBG("%s neg_adv_abort ep %p tid %d\n", __func__, ep,
+ ep->hwtid);
+ t3_l2t_send_event(ep->com.tdev, ep->l2t);
+ return CPL_RET_BUF_DONE;
+ }
+
+ /*
+ * We get 2 peer aborts from the HW. The first one must
+ * be ignored except for scribbling that we need one more.
+ */
+ if (!test_and_set_bit(PEER_ABORT_IN_PROGRESS, &ep->com.flags)) {
+ return CPL_RET_BUF_DONE;
+ }
+
+ spin_lock_irqsave(&ep->com.lock, flags);
+ PDBG("%s ep %p state %u\n", __func__, ep, ep->com.state);
+ switch (ep->com.state) {
+ case CONNECTING:
+ break;
+ case MPA_REQ_WAIT:
+ stop_ep_timer(ep);
+ break;
+ case MPA_REQ_SENT:
+ stop_ep_timer(ep);
+ connect_reply_upcall(ep, -ECONNRESET);
+ break;
+ case MPA_REP_SENT:
+ ep->com.rpl_done = 1;
+ ep->com.rpl_err = -ECONNRESET;
+ PDBG("waking up ep %p\n", ep);
+ wake_up(&ep->com.waitq);
+ break;
+ case MPA_REQ_RCVD:
+
+ /*
+ * We're gonna mark this puppy DEAD, but keep
+ * the reference on it until the ULP accepts or
+ * rejects the CR. Also wake up anyone waiting
+ * in rdma connection migration (see iwch_accept_cr()).
+ */
+ ep->com.rpl_done = 1;
+ ep->com.rpl_err = -ECONNRESET;
+ PDBG("waking up ep %p\n", ep);
+ wake_up(&ep->com.waitq);
+ break;
+ case MORIBUND:
+ case CLOSING:
+ stop_ep_timer(ep);
+ /*FALLTHROUGH*/
+ case FPDU_MODE:
+ if (ep->com.cm_id && ep->com.qp) {
+ attrs.next_state = IWCH_QP_STATE_ERROR;
+ ret = iwch_modify_qp(ep->com.qp->rhp,
+ ep->com.qp, IWCH_QP_ATTR_NEXT_STATE,
+ &attrs, 1);
+ if (ret)
+ printk(KERN_ERR MOD
+ "%s - qp <- error failed!\n",
+ __func__);
+ }
+ peer_abort_upcall(ep);
+ break;
+ case ABORTING:
+ break;
+ case DEAD:
+ PDBG("%s PEER_ABORT IN DEAD STATE!!!!\n", __func__);
+ spin_unlock_irqrestore(&ep->com.lock, flags);
+ return CPL_RET_BUF_DONE;
+ default:
+ BUG_ON(1);
+ break;
+ }
+ dst_confirm(ep->dst);
+ if (ep->com.state != ABORTING) {
+ __state_set(&ep->com, DEAD);
+ release = 1;
+ }
+ spin_unlock_irqrestore(&ep->com.lock, flags);
+
+ rpl_skb = get_skb(skb, sizeof(*rpl), GFP_KERNEL);
+ if (!rpl_skb) {
+ printk(KERN_ERR MOD "%s - cannot allocate skb!\n",
+ __func__);
+ release = 1;
+ goto out;
+ }
+ rpl_skb->priority = CPL_PRIORITY_DATA;
+ rpl = (struct cpl_abort_rpl *) skb_put(rpl_skb, sizeof(*rpl));
+ rpl->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_HOST_ABORT_CON_RPL));
+ rpl->wr.wr_lo = htonl(V_WR_TID(ep->hwtid));
+ OPCODE_TID(rpl) = htonl(MK_OPCODE_TID(CPL_ABORT_RPL, ep->hwtid));
+ rpl->cmd = CPL_ABORT_NO_RST;
+ iwch_cxgb3_ofld_send(ep->com.tdev, rpl_skb);
+out:
+ if (release)
+ release_ep_resources(ep);
+ return CPL_RET_BUF_DONE;
+}
+
+static int close_con_rpl(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
+{
+ struct iwch_ep *ep = ctx;
+ struct iwch_qp_attributes attrs;
+ unsigned long flags;
+ int release = 0;
+
+ PDBG("%s ep %p\n", __func__, ep);
+ BUG_ON(!ep);
+
+ /* The cm_id may be null if we failed to connect */
+ spin_lock_irqsave(&ep->com.lock, flags);
+ switch (ep->com.state) {
+ case CLOSING:
+ __state_set(&ep->com, MORIBUND);
+ break;
+ case MORIBUND:
+ stop_ep_timer(ep);
+ if ((ep->com.cm_id) && (ep->com.qp)) {
+ attrs.next_state = IWCH_QP_STATE_IDLE;
+ iwch_modify_qp(ep->com.qp->rhp,
+ ep->com.qp,
+ IWCH_QP_ATTR_NEXT_STATE,
+ &attrs, 1);
+ }
+ close_complete_upcall(ep);
+ __state_set(&ep->com, DEAD);
+ release = 1;
+ break;
+ case ABORTING:
+ case DEAD:
+ break;
+ default:
+ BUG_ON(1);
+ break;
+ }
+ spin_unlock_irqrestore(&ep->com.lock, flags);
+ if (release)
+ release_ep_resources(ep);
+ return CPL_RET_BUF_DONE;
+}
+
+/*
+ * T3A does 3 things when a TERM is received:
+ * 1) send up a CPL_RDMA_TERMINATE message with the TERM packet
+ * 2) generate an async event on the QP with the TERMINATE opcode
+ * 3) post a TERMINATE opcode cqe into the associated CQ.
+ *
+ * For (1), we save the message in the qp for later consumer consumption.
+ * For (2), we move the QP into TERMINATE, post a QP event and disconnect.
+ * For (3), we toss the CQE in cxio_poll_cq().
+ *
+ * terminate() handles case (1)...
+ */
+static int terminate(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
+{
+ struct iwch_ep *ep = ctx;
+
+ if (state_read(&ep->com) != FPDU_MODE)
+ return CPL_RET_BUF_DONE;
+
+ PDBG("%s ep %p\n", __func__, ep);
+ skb_pull(skb, sizeof(struct cpl_rdma_terminate));
+ PDBG("%s saving %d bytes of term msg\n", __func__, skb->len);
+ skb_copy_from_linear_data(skb, ep->com.qp->attr.terminate_buffer,
+ skb->len);
+ ep->com.qp->attr.terminate_msg_len = skb->len;
+ ep->com.qp->attr.is_terminate_local = 0;
+ return CPL_RET_BUF_DONE;
+}
+
+static int ec_status(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
+{
+ struct cpl_rdma_ec_status *rep = cplhdr(skb);
+ struct iwch_ep *ep = ctx;
+
+ PDBG("%s ep %p tid %u status %d\n", __func__, ep, ep->hwtid,
+ rep->status);
+ if (rep->status) {
+ struct iwch_qp_attributes attrs;
+
+ printk(KERN_ERR MOD "%s BAD CLOSE - Aborting tid %u\n",
+ __func__, ep->hwtid);
+ stop_ep_timer(ep);
+ attrs.next_state = IWCH_QP_STATE_ERROR;
+ iwch_modify_qp(ep->com.qp->rhp,
+ ep->com.qp, IWCH_QP_ATTR_NEXT_STATE,
+ &attrs, 1);
+ abort_connection(ep, NULL, GFP_KERNEL);
+ }
+ return CPL_RET_BUF_DONE;
+}
+
+static void ep_timeout(unsigned long arg)
+{
+ struct iwch_ep *ep = (struct iwch_ep *)arg;
+ struct iwch_qp_attributes attrs;
+ unsigned long flags;
+ int abort = 1;
+
+ spin_lock_irqsave(&ep->com.lock, flags);
+ PDBG("%s ep %p tid %u state %d\n", __func__, ep, ep->hwtid,
+ ep->com.state);
+ switch (ep->com.state) {
+ case MPA_REQ_SENT:
+ __state_set(&ep->com, ABORTING);
+ connect_reply_upcall(ep, -ETIMEDOUT);
+ break;
+ case MPA_REQ_WAIT:
+ __state_set(&ep->com, ABORTING);
+ break;
+ case CLOSING:
+ case MORIBUND:
+ if (ep->com.cm_id && ep->com.qp) {
+ attrs.next_state = IWCH_QP_STATE_ERROR;
+ iwch_modify_qp(ep->com.qp->rhp,
+ ep->com.qp, IWCH_QP_ATTR_NEXT_STATE,
+ &attrs, 1);
+ }
+ __state_set(&ep->com, ABORTING);
+ break;
+ default:
+ WARN(1, "%s unexpected state ep %p state %u\n",
+ __func__, ep, ep->com.state);
+ abort = 0;
+ }
+ spin_unlock_irqrestore(&ep->com.lock, flags);
+ if (abort)
+ abort_connection(ep, NULL, GFP_ATOMIC);
+ put_ep(&ep->com);
+}
+
+int iwch_reject_cr(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
+{
+ int err;
+ struct iwch_ep *ep = to_ep(cm_id);
+ PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
+
+ if (state_read(&ep->com) == DEAD) {
+ put_ep(&ep->com);
+ return -ECONNRESET;
+ }
+ BUG_ON(state_read(&ep->com) != MPA_REQ_RCVD);
+ if (mpa_rev == 0)
+ abort_connection(ep, NULL, GFP_KERNEL);
+ else {
+ err = send_mpa_reject(ep, pdata, pdata_len);
+ err = iwch_ep_disconnect(ep, 0, GFP_KERNEL);
+ }
+ put_ep(&ep->com);
+ return 0;
+}
+
+int iwch_accept_cr(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
+{
+ int err;
+ struct iwch_qp_attributes attrs;
+ enum iwch_qp_attr_mask mask;
+ struct iwch_ep *ep = to_ep(cm_id);
+ struct iwch_dev *h = to_iwch_dev(cm_id->device);
+ struct iwch_qp *qp = get_qhp(h, conn_param->qpn);
+
+ PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
+ if (state_read(&ep->com) == DEAD) {
+ err = -ECONNRESET;
+ goto err;
+ }
+
+ BUG_ON(state_read(&ep->com) != MPA_REQ_RCVD);
+ BUG_ON(!qp);
+
+ if ((conn_param->ord > qp->rhp->attr.max_rdma_read_qp_depth) ||
+ (conn_param->ird > qp->rhp->attr.max_rdma_reads_per_qp)) {
+ abort_connection(ep, NULL, GFP_KERNEL);
+ err = -EINVAL;
+ goto err;
+ }
+
+ cm_id->add_ref(cm_id);
+ ep->com.cm_id = cm_id;
+ ep->com.qp = qp;
+
+ ep->ird = conn_param->ird;
+ ep->ord = conn_param->ord;
+
+ if (peer2peer && ep->ird == 0)
+ ep->ird = 1;
+
+ PDBG("%s %d ird %d ord %d\n", __func__, __LINE__, ep->ird, ep->ord);
+
+ /* bind QP to EP and move to RTS */
+ attrs.mpa_attr = ep->mpa_attr;
+ attrs.max_ird = ep->ird;
+ attrs.max_ord = ep->ord;
+ attrs.llp_stream_handle = ep;
+ attrs.next_state = IWCH_QP_STATE_RTS;
+
+ /* bind QP and TID with INIT_WR */
+ mask = IWCH_QP_ATTR_NEXT_STATE |
+ IWCH_QP_ATTR_LLP_STREAM_HANDLE |
+ IWCH_QP_ATTR_MPA_ATTR |
+ IWCH_QP_ATTR_MAX_IRD |
+ IWCH_QP_ATTR_MAX_ORD;
+
+ err = iwch_modify_qp(ep->com.qp->rhp,
+ ep->com.qp, mask, &attrs, 1);
+ if (err)
+ goto err1;
+
+ /* if needed, wait for wr_ack */
+ if (iwch_rqes_posted(qp)) {
+ wait_event(ep->com.waitq, ep->com.rpl_done);
+ err = ep->com.rpl_err;
+ if (err)
+ goto err1;
+ }
+
+ err = send_mpa_reply(ep, conn_param->private_data,
+ conn_param->private_data_len);
+ if (err)
+ goto err1;
+
+
+ state_set(&ep->com, FPDU_MODE);
+ established_upcall(ep);
+ put_ep(&ep->com);
+ return 0;
+err1:
+ ep->com.cm_id = NULL;
+ ep->com.qp = NULL;
+ cm_id->rem_ref(cm_id);
+err:
+ put_ep(&ep->com);
+ return err;
+}
+
+static int is_loopback_dst(struct iw_cm_id *cm_id)
+{
+ struct net_device *dev;
+ struct sockaddr_in *raddr = (struct sockaddr_in *)&cm_id->remote_addr;
+
+ dev = ip_dev_find(&init_net, raddr->sin_addr.s_addr);
+ if (!dev)
+ return 0;
+ dev_put(dev);
+ return 1;
+}
+
+int iwch_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
+{
+ struct iwch_dev *h = to_iwch_dev(cm_id->device);
+ struct iwch_ep *ep;
+ struct rtable *rt;
+ int err = 0;
+ struct sockaddr_in *laddr = (struct sockaddr_in *)&cm_id->local_addr;
+ struct sockaddr_in *raddr = (struct sockaddr_in *)&cm_id->remote_addr;
+
+ if (cm_id->remote_addr.ss_family != PF_INET) {
+ err = -ENOSYS;
+ goto out;
+ }
+
+ if (is_loopback_dst(cm_id)) {
+ err = -ENOSYS;
+ goto out;
+ }
+
+ ep = alloc_ep(sizeof(*ep), GFP_KERNEL);
+ if (!ep) {
+ printk(KERN_ERR MOD "%s - cannot alloc ep.\n", __func__);
+ err = -ENOMEM;
+ goto out;
+ }
+ init_timer(&ep->timer);
+ ep->plen = conn_param->private_data_len;
+ if (ep->plen)
+ memcpy(ep->mpa_pkt + sizeof(struct mpa_message),
+ conn_param->private_data, ep->plen);
+ ep->ird = conn_param->ird;
+ ep->ord = conn_param->ord;
+
+ if (peer2peer && ep->ord == 0)
+ ep->ord = 1;
+
+ ep->com.tdev = h->rdev.t3cdev_p;
+
+ cm_id->add_ref(cm_id);
+ ep->com.cm_id = cm_id;
+ ep->com.qp = get_qhp(h, conn_param->qpn);
+ BUG_ON(!ep->com.qp);
+ PDBG("%s qpn 0x%x qp %p cm_id %p\n", __func__, conn_param->qpn,
+ ep->com.qp, cm_id);
+
+ /*
+ * Allocate an active TID to initiate a TCP connection.
+ */
+ ep->atid = cxgb3_alloc_atid(h->rdev.t3cdev_p, &t3c_client, ep);
+ if (ep->atid == -1) {
+ printk(KERN_ERR MOD "%s - cannot alloc atid.\n", __func__);
+ err = -ENOMEM;
+ goto fail2;
+ }
+
+ /* find a route */
+ rt = find_route(h->rdev.t3cdev_p, laddr->sin_addr.s_addr,
+ raddr->sin_addr.s_addr, laddr->sin_port,
+ raddr->sin_port, IPTOS_LOWDELAY);
+ if (!rt) {
+ printk(KERN_ERR MOD "%s - cannot find route.\n", __func__);
+ err = -EHOSTUNREACH;
+ goto fail3;
+ }
+ ep->dst = &rt->dst;
+ ep->l2t = t3_l2t_get(ep->com.tdev, ep->dst, NULL,
+ &raddr->sin_addr.s_addr);
+ if (!ep->l2t) {
+ printk(KERN_ERR MOD "%s - cannot alloc l2e.\n", __func__);
+ err = -ENOMEM;
+ goto fail4;
+ }
+
+ state_set(&ep->com, CONNECTING);
+ ep->tos = IPTOS_LOWDELAY;
+ memcpy(&ep->com.local_addr, &cm_id->local_addr,
+ sizeof(ep->com.local_addr));
+ memcpy(&ep->com.remote_addr, &cm_id->remote_addr,
+ sizeof(ep->com.remote_addr));
+
+ /* send connect request to rnic */
+ err = send_connect(ep);
+ if (!err)
+ goto out;
+
+ l2t_release(h->rdev.t3cdev_p, ep->l2t);
+fail4:
+ dst_release(ep->dst);
+fail3:
+ cxgb3_free_atid(ep->com.tdev, ep->atid);
+fail2:
+ cm_id->rem_ref(cm_id);
+ put_ep(&ep->com);
+out:
+ return err;
+}
+
+int iwch_create_listen(struct iw_cm_id *cm_id, int backlog)
+{
+ int err = 0;
+ struct iwch_dev *h = to_iwch_dev(cm_id->device);
+ struct iwch_listen_ep *ep;
+
+
+ might_sleep();
+
+ if (cm_id->local_addr.ss_family != PF_INET) {
+ err = -ENOSYS;
+ goto fail1;
+ }
+
+ ep = alloc_ep(sizeof(*ep), GFP_KERNEL);
+ if (!ep) {
+ printk(KERN_ERR MOD "%s - cannot alloc ep.\n", __func__);
+ err = -ENOMEM;
+ goto fail1;
+ }
+ PDBG("%s ep %p\n", __func__, ep);
+ ep->com.tdev = h->rdev.t3cdev_p;
+ cm_id->add_ref(cm_id);
+ ep->com.cm_id = cm_id;
+ ep->backlog = backlog;
+ memcpy(&ep->com.local_addr, &cm_id->local_addr,
+ sizeof(ep->com.local_addr));
+
+ /*
+ * Allocate a server TID.
+ */
+ ep->stid = cxgb3_alloc_stid(h->rdev.t3cdev_p, &t3c_client, ep);
+ if (ep->stid == -1) {
+ printk(KERN_ERR MOD "%s - cannot alloc atid.\n", __func__);
+ err = -ENOMEM;
+ goto fail2;
+ }
+
+ state_set(&ep->com, LISTEN);
+ err = listen_start(ep);
+ if (err)
+ goto fail3;
+
+ /* wait for pass_open_rpl */
+ wait_event(ep->com.waitq, ep->com.rpl_done);
+ err = ep->com.rpl_err;
+ if (!err) {
+ cm_id->provider_data = ep;
+ goto out;
+ }
+fail3:
+ cxgb3_free_stid(ep->com.tdev, ep->stid);
+fail2:
+ cm_id->rem_ref(cm_id);
+ put_ep(&ep->com);
+fail1:
+out:
+ return err;
+}
+
+int iwch_destroy_listen(struct iw_cm_id *cm_id)
+{
+ int err;
+ struct iwch_listen_ep *ep = to_listen_ep(cm_id);
+
+ PDBG("%s ep %p\n", __func__, ep);
+
+ might_sleep();
+ state_set(&ep->com, DEAD);
+ ep->com.rpl_done = 0;
+ ep->com.rpl_err = 0;
+ err = listen_stop(ep);
+ if (err)
+ goto done;
+ wait_event(ep->com.waitq, ep->com.rpl_done);
+ cxgb3_free_stid(ep->com.tdev, ep->stid);
+done:
+ err = ep->com.rpl_err;
+ cm_id->rem_ref(cm_id);
+ put_ep(&ep->com);
+ return err;
+}
+
+int iwch_ep_disconnect(struct iwch_ep *ep, int abrupt, gfp_t gfp)
+{
+ int ret=0;
+ unsigned long flags;
+ int close = 0;
+ int fatal = 0;
+ struct t3cdev *tdev;
+ struct cxio_rdev *rdev;
+
+ spin_lock_irqsave(&ep->com.lock, flags);
+
+ PDBG("%s ep %p state %s, abrupt %d\n", __func__, ep,
+ states[ep->com.state], abrupt);
+
+ tdev = (struct t3cdev *)ep->com.tdev;
+ rdev = (struct cxio_rdev *)tdev->ulp;
+ if (cxio_fatal_error(rdev)) {
+ fatal = 1;
+ close_complete_upcall(ep);
+ ep->com.state = DEAD;
+ }
+ switch (ep->com.state) {
+ case MPA_REQ_WAIT:
+ case MPA_REQ_SENT:
+ case MPA_REQ_RCVD:
+ case MPA_REP_SENT:
+ case FPDU_MODE:
+ close = 1;
+ if (abrupt)
+ ep->com.state = ABORTING;
+ else {
+ ep->com.state = CLOSING;
+ start_ep_timer(ep);
+ }
+ set_bit(CLOSE_SENT, &ep->com.flags);
+ break;
+ case CLOSING:
+ if (!test_and_set_bit(CLOSE_SENT, &ep->com.flags)) {
+ close = 1;
+ if (abrupt) {
+ stop_ep_timer(ep);
+ ep->com.state = ABORTING;
+ } else
+ ep->com.state = MORIBUND;
+ }
+ break;
+ case MORIBUND:
+ case ABORTING:
+ case DEAD:
+ PDBG("%s ignoring disconnect ep %p state %u\n",
+ __func__, ep, ep->com.state);
+ break;
+ default:
+ BUG();
+ break;
+ }
+
+ spin_unlock_irqrestore(&ep->com.lock, flags);
+ if (close) {
+ if (abrupt)
+ ret = send_abort(ep, NULL, gfp);
+ else
+ ret = send_halfclose(ep, gfp);
+ if (ret)
+ fatal = 1;
+ }
+ if (fatal)
+ release_ep_resources(ep);
+ return ret;
+}
+
+int iwch_ep_redirect(void *ctx, struct dst_entry *old, struct dst_entry *new,
+ struct l2t_entry *l2t)
+{
+ struct iwch_ep *ep = ctx;
+
+ if (ep->dst != old)
+ return 0;
+
+ PDBG("%s ep %p redirect to dst %p l2t %p\n", __func__, ep, new,
+ l2t);
+ dst_hold(new);
+ l2t_release(ep->com.tdev, ep->l2t);
+ ep->l2t = l2t;
+ dst_release(old);
+ ep->dst = new;
+ return 1;
+}
+
+/*
+ * All the CM events are handled on a work queue to have a safe context.
+ * These are the real handlers that are called from the work queue.
+ */
+static const cxgb3_cpl_handler_func work_handlers[NUM_CPL_CMDS] = {
+ [CPL_ACT_ESTABLISH] = act_establish,
+ [CPL_ACT_OPEN_RPL] = act_open_rpl,
+ [CPL_RX_DATA] = rx_data,
+ [CPL_TX_DMA_ACK] = tx_ack,
+ [CPL_ABORT_RPL_RSS] = abort_rpl,
+ [CPL_ABORT_RPL] = abort_rpl,
+ [CPL_PASS_OPEN_RPL] = pass_open_rpl,
+ [CPL_CLOSE_LISTSRV_RPL] = close_listsrv_rpl,
+ [CPL_PASS_ACCEPT_REQ] = pass_accept_req,
+ [CPL_PASS_ESTABLISH] = pass_establish,
+ [CPL_PEER_CLOSE] = peer_close,
+ [CPL_ABORT_REQ_RSS] = peer_abort,
+ [CPL_CLOSE_CON_RPL] = close_con_rpl,
+ [CPL_RDMA_TERMINATE] = terminate,
+ [CPL_RDMA_EC_STATUS] = ec_status,
+};
+
+static void process_work(struct work_struct *work)
+{
+ struct sk_buff *skb = NULL;
+ void *ep;
+ struct t3cdev *tdev;
+ int ret;
+
+ while ((skb = skb_dequeue(&rxq))) {
+ ep = *((void **) (skb->cb));
+ tdev = *((struct t3cdev **) (skb->cb + sizeof(void *)));
+ ret = work_handlers[G_OPCODE(ntohl((__force __be32)skb->csum))](tdev, skb, ep);
+ if (ret & CPL_RET_BUF_DONE)
+ kfree_skb(skb);
+
+ /*
+ * ep was referenced in sched(), and is freed here.
+ */
+ put_ep((struct iwch_ep_common *)ep);
+ }
+}
+
+static DECLARE_WORK(skb_work, process_work);
+
+static int sched(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
+{
+ struct iwch_ep_common *epc = ctx;
+
+ get_ep(epc);
+
+ /*
+ * Save ctx and tdev in the skb->cb area.
+ */
+ *((void **) skb->cb) = ctx;
+ *((struct t3cdev **) (skb->cb + sizeof(void *))) = tdev;
+
+ /*
+ * Queue the skb and schedule the worker thread.
+ */
+ skb_queue_tail(&rxq, skb);
+ queue_work(workq, &skb_work);
+ return 0;
+}
+
+static int set_tcb_rpl(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
+{
+ struct cpl_set_tcb_rpl *rpl = cplhdr(skb);
+
+ if (rpl->status != CPL_ERR_NONE) {
+ printk(KERN_ERR MOD "Unexpected SET_TCB_RPL status %u "
+ "for tid %u\n", rpl->status, GET_TID(rpl));
+ }
+ return CPL_RET_BUF_DONE;
+}
+
+/*
+ * All upcalls from the T3 Core go to sched() to schedule the
+ * processing on a work queue.
+ */
+cxgb3_cpl_handler_func t3c_handlers[NUM_CPL_CMDS] = {
+ [CPL_ACT_ESTABLISH] = sched,
+ [CPL_ACT_OPEN_RPL] = sched,
+ [CPL_RX_DATA] = sched,
+ [CPL_TX_DMA_ACK] = sched,
+ [CPL_ABORT_RPL_RSS] = sched,
+ [CPL_ABORT_RPL] = sched,
+ [CPL_PASS_OPEN_RPL] = sched,
+ [CPL_CLOSE_LISTSRV_RPL] = sched,
+ [CPL_PASS_ACCEPT_REQ] = sched,
+ [CPL_PASS_ESTABLISH] = sched,
+ [CPL_PEER_CLOSE] = sched,
+ [CPL_CLOSE_CON_RPL] = sched,
+ [CPL_ABORT_REQ_RSS] = sched,
+ [CPL_RDMA_TERMINATE] = sched,
+ [CPL_RDMA_EC_STATUS] = sched,
+ [CPL_SET_TCB_RPL] = set_tcb_rpl,
+};
+
+int __init iwch_cm_init(void)
+{
+ skb_queue_head_init(&rxq);
+
+ workq = create_singlethread_workqueue("iw_cxgb3");
+ if (!workq)
+ return -ENOMEM;
+
+ return 0;
+}
+
+void __exit iwch_cm_term(void)
+{
+ flush_workqueue(workq);
+ destroy_workqueue(workq);
+}
Code Review / kvmfornfv.git / blobdiff