cm.c 114.3 KB
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/*
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 * Copyright (c) 2009-2014 Chelsio, Inc. All rights reserved.
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 *
 * 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/workqueue.h>
#include <linux/skbuff.h>
#include <linux/timer.h>
#include <linux/notifier.h>
#include <linux/inetdevice.h>
#include <linux/ip.h>
#include <linux/tcp.h>
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#include <linux/if_vlan.h>
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#include <net/neighbour.h>
#include <net/netevent.h>
#include <net/route.h>
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#include <net/tcp.h>
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#include <net/ip6_route.h>
#include <net/addrconf.h>
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#include <rdma/ib_addr.h>

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#include "iw_cxgb4.h"
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#include "clip_tbl.h"
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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,
};

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static int nocong;
module_param(nocong, int, 0644);
MODULE_PARM_DESC(nocong, "Turn of congestion control (default=0)");

static int enable_ecn;
module_param(enable_ecn, int, 0644);
MODULE_PARM_DESC(enable_ecn, "Enable ECN (default=0/disabled)");

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static int dack_mode = 1;
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module_param(dack_mode, int, 0644);
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MODULE_PARM_DESC(dack_mode, "Delayed ack mode (default=1)");
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uint c4iw_max_read_depth = 32;
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module_param(c4iw_max_read_depth, int, 0644);
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MODULE_PARM_DESC(c4iw_max_read_depth,
		 "Per-connection max ORD/IRD (default=32)");
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static int enable_tcp_timestamps;
module_param(enable_tcp_timestamps, int, 0644);
MODULE_PARM_DESC(enable_tcp_timestamps, "Enable tcp timestamps (default=0)");

static int enable_tcp_sack;
module_param(enable_tcp_sack, int, 0644);
MODULE_PARM_DESC(enable_tcp_sack, "Enable tcp SACK (default=0)");

static int enable_tcp_window_scaling = 1;
module_param(enable_tcp_window_scaling, int, 0644);
MODULE_PARM_DESC(enable_tcp_window_scaling,
		 "Enable tcp window scaling (default=1)");

int c4iw_debug;
module_param(c4iw_debug, int, 0644);
MODULE_PARM_DESC(c4iw_debug, "Enable debug logging (default=0)");

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static int peer2peer = 1;
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module_param(peer2peer, int, 0644);
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MODULE_PARM_DESC(peer2peer, "Support peer2peer ULPs (default=1)");
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static int p2p_type = FW_RI_INIT_P2PTYPE_READ_REQ;
module_param(p2p_type, int, 0644);
MODULE_PARM_DESC(p2p_type, "RDMAP opcode to use for the RTR message: "
			   "1=RDMA_READ 0=RDMA_WRITE (default 1)");

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)");

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static int mpa_rev = 2;
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module_param(mpa_rev, int, 0644);
MODULE_PARM_DESC(mpa_rev, "MPA Revision, 0 supports amso1100, "
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		"1 is RFC5044 spec compliant, 2 is IETF MPA Peer Connect Draft"
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		" compliant (default=2)");
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static int markers_enabled;
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=256KB)");

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static int snd_win = 128 * 1024;
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module_param(snd_win, int, 0644);
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MODULE_PARM_DESC(snd_win, "TCP send window in bytes (default=128KB)");
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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 c4iw_ep *ep, int status);
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static int sched(struct c4iw_dev *dev, struct sk_buff *skb);
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static LIST_HEAD(timeout_list);
static spinlock_t timeout_lock;

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static void deref_cm_id(struct c4iw_ep_common *epc)
{
	epc->cm_id->rem_ref(epc->cm_id);
	epc->cm_id = NULL;
	set_bit(CM_ID_DEREFED, &epc->history);
}

static void ref_cm_id(struct c4iw_ep_common *epc)
{
	set_bit(CM_ID_REFED, &epc->history);
	epc->cm_id->add_ref(epc->cm_id);
}

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static void deref_qp(struct c4iw_ep *ep)
{
	c4iw_qp_rem_ref(&ep->com.qp->ibqp);
	clear_bit(QP_REFERENCED, &ep->com.flags);
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	set_bit(QP_DEREFED, &ep->com.history);
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}

static void ref_qp(struct c4iw_ep *ep)
{
	set_bit(QP_REFERENCED, &ep->com.flags);
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	set_bit(QP_REFED, &ep->com.history);
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	c4iw_qp_add_ref(&ep->com.qp->ibqp);
}

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static void start_ep_timer(struct c4iw_ep *ep)
{
	PDBG("%s ep %p\n", __func__, ep);
	if (timer_pending(&ep->timer)) {
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		pr_err("%s timer already started! ep %p\n",
		       __func__, ep);
		return;
	}
	clear_bit(TIMEOUT, &ep->com.flags);
	c4iw_get_ep(&ep->com);
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	ep->timer.expires = jiffies + ep_timeout_secs * HZ;
	ep->timer.data = (unsigned long)ep;
	ep->timer.function = ep_timeout;
	add_timer(&ep->timer);
}

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static int stop_ep_timer(struct c4iw_ep *ep)
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{
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	PDBG("%s ep %p stopping\n", __func__, ep);
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	del_timer_sync(&ep->timer);
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	if (!test_and_set_bit(TIMEOUT, &ep->com.flags)) {
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		c4iw_put_ep(&ep->com);
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		return 0;
	}
	return 1;
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}

static int c4iw_l2t_send(struct c4iw_rdev *rdev, struct sk_buff *skb,
		  struct l2t_entry *l2e)
{
	int	error = 0;

	if (c4iw_fatal_error(rdev)) {
		kfree_skb(skb);
		PDBG("%s - device in error state - dropping\n", __func__);
		return -EIO;
	}
	error = cxgb4_l2t_send(rdev->lldi.ports[0], skb, l2e);
	if (error < 0)
		kfree_skb(skb);
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	else if (error == NET_XMIT_DROP)
		return -ENOMEM;
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	return error < 0 ? error : 0;
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}

int c4iw_ofld_send(struct c4iw_rdev *rdev, struct sk_buff *skb)
{
	int	error = 0;

	if (c4iw_fatal_error(rdev)) {
		kfree_skb(skb);
		PDBG("%s - device in error state - dropping\n", __func__);
		return -EIO;
	}
	error = cxgb4_ofld_send(rdev->lldi.ports[0], skb);
	if (error < 0)
		kfree_skb(skb);
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	return error < 0 ? error : 0;
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}

static void release_tid(struct c4iw_rdev *rdev, 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));
	INIT_TP_WR(req, hwtid);
	OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_TID_RELEASE, hwtid));
	set_wr_txq(skb, CPL_PRIORITY_SETUP, 0);
	c4iw_ofld_send(rdev, skb);
	return;
}

static void set_emss(struct c4iw_ep *ep, u16 opt)
{
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	ep->emss = ep->com.dev->rdev.lldi.mtus[TCPOPT_MSS_G(opt)] -
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		   ((AF_INET == ep->com.remote_addr.ss_family) ?
		    sizeof(struct iphdr) : sizeof(struct ipv6hdr)) -
		   sizeof(struct tcphdr);
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	ep->mss = ep->emss;
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	if (TCPOPT_TSTAMP_G(opt))
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		ep->emss -= round_up(TCPOLEN_TIMESTAMP, 4);
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	if (ep->emss < 128)
		ep->emss = 128;
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	if (ep->emss & 7)
		PDBG("Warning: misaligned mtu idx %u mss %u emss=%u\n",
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		     TCPOPT_MSS_G(opt), ep->mss, ep->emss);
	PDBG("%s mss_idx %u mss %u emss=%u\n", __func__, TCPOPT_MSS_G(opt),
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	     ep->mss, ep->emss);
}

static enum c4iw_ep_state state_read(struct c4iw_ep_common *epc)
{
	enum c4iw_ep_state state;

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	mutex_lock(&epc->mutex);
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	state = epc->state;
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	mutex_unlock(&epc->mutex);
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	return state;
}

static void __state_set(struct c4iw_ep_common *epc, enum c4iw_ep_state new)
{
	epc->state = new;
}

static void state_set(struct c4iw_ep_common *epc, enum c4iw_ep_state new)
{
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	mutex_lock(&epc->mutex);
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	PDBG("%s - %s -> %s\n", __func__, states[epc->state], states[new]);
	__state_set(epc, new);
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	mutex_unlock(&epc->mutex);
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	return;
}

static void *alloc_ep(int size, gfp_t gfp)
{
	struct c4iw_ep_common *epc;

	epc = kzalloc(size, gfp);
	if (epc) {
		kref_init(&epc->kref);
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		mutex_init(&epc->mutex);
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		c4iw_init_wr_wait(&epc->wr_wait);
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	}
	PDBG("%s alloc ep %p\n", __func__, epc);
	return epc;
}

void _c4iw_free_ep(struct kref *kref)
{
	struct c4iw_ep *ep;

	ep = container_of(kref, struct c4iw_ep, com.kref);
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	PDBG("%s ep %p state %s\n", __func__, ep, states[ep->com.state]);
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	if (test_bit(QP_REFERENCED, &ep->com.flags))
		deref_qp(ep);
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	if (test_bit(RELEASE_RESOURCES, &ep->com.flags)) {
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		if (ep->com.remote_addr.ss_family == AF_INET6) {
			struct sockaddr_in6 *sin6 =
					(struct sockaddr_in6 *)
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					&ep->com.local_addr;
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			cxgb4_clip_release(
					ep->com.dev->rdev.lldi.ports[0],
					(const u32 *)&sin6->sin6_addr.s6_addr,
					1);
		}
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		remove_handle(ep->com.dev, &ep->com.dev->hwtid_idr, ep->hwtid);
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		cxgb4_remove_tid(ep->com.dev->rdev.lldi.tids, 0, ep->hwtid);
		dst_release(ep->dst);
		cxgb4_l2t_release(ep->l2t);
	}
	kfree(ep);
}

static void release_ep_resources(struct c4iw_ep *ep)
{
	set_bit(RELEASE_RESOURCES, &ep->com.flags);
	c4iw_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);
		skb_reset_transport_header(skb);
	} else {
		skb = alloc_skb(len, gfp);
	}
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	t4_set_arp_err_handler(skb, NULL, NULL);
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	return skb;
}

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static struct net_device *get_real_dev(struct net_device *egress_dev)
{
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	return rdma_vlan_dev_real_dev(egress_dev) ? : egress_dev;
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}

static int our_interface(struct c4iw_dev *dev, struct net_device *egress_dev)
{
	int i;

	egress_dev = get_real_dev(egress_dev);
	for (i = 0; i < dev->rdev.lldi.nports; i++)
		if (dev->rdev.lldi.ports[i] == egress_dev)
			return 1;
	return 0;
}

static struct dst_entry *find_route6(struct c4iw_dev *dev, __u8 *local_ip,
				     __u8 *peer_ip, __be16 local_port,
				     __be16 peer_port, u8 tos,
				     __u32 sin6_scope_id)
{
	struct dst_entry *dst = NULL;

	if (IS_ENABLED(CONFIG_IPV6)) {
		struct flowi6 fl6;

		memset(&fl6, 0, sizeof(fl6));
		memcpy(&fl6.daddr, peer_ip, 16);
		memcpy(&fl6.saddr, local_ip, 16);
		if (ipv6_addr_type(&fl6.daddr) & IPV6_ADDR_LINKLOCAL)
			fl6.flowi6_oif = sin6_scope_id;
		dst = ip6_route_output(&init_net, NULL, &fl6);
		if (!dst)
			goto out;
		if (!our_interface(dev, ip6_dst_idev(dst)->dev) &&
		    !(ip6_dst_idev(dst)->dev->flags & IFF_LOOPBACK)) {
			dst_release(dst);
			dst = NULL;
		}
	}

out:
	return dst;
}

static struct dst_entry *find_route(struct c4iw_dev *dev, __be32 local_ip,
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				 __be32 peer_ip, __be16 local_port,
				 __be16 peer_port, u8 tos)
{
	struct rtable *rt;
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	struct flowi4 fl4;
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	struct neighbour *n;
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	rt = ip_route_output_ports(&init_net, &fl4, NULL, peer_ip, local_ip,
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				   peer_port, local_port, IPPROTO_TCP,
				   tos, 0);
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	if (IS_ERR(rt))
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		return NULL;
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	n = dst_neigh_lookup(&rt->dst, &peer_ip);
	if (!n)
		return NULL;
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	if (!our_interface(dev, n->dev) &&
	    !(n->dev->flags & IFF_LOOPBACK)) {
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		neigh_release(n);
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		dst_release(&rt->dst);
		return NULL;
	}
	neigh_release(n);
	return &rt->dst;
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}

static void arp_failure_discard(void *handle, struct sk_buff *skb)
{
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	pr_err(MOD "ARP failure\n");
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	kfree_skb(skb);
}

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enum {
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	NUM_FAKE_CPLS = 2,
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	FAKE_CPL_PUT_EP_SAFE = NUM_CPL_CMDS + 0,
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	FAKE_CPL_PASS_PUT_EP_SAFE = NUM_CPL_CMDS + 1,
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};

static int _put_ep_safe(struct c4iw_dev *dev, struct sk_buff *skb)
{
	struct c4iw_ep *ep;

	ep = *((struct c4iw_ep **)(skb->cb + 2 * sizeof(void *)));
	release_ep_resources(ep);
	return 0;
}

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static int _put_pass_ep_safe(struct c4iw_dev *dev, struct sk_buff *skb)
{
	struct c4iw_ep *ep;

	ep = *((struct c4iw_ep **)(skb->cb + 2 * sizeof(void *)));
	c4iw_put_ep(&ep->parent_ep->com);
	release_ep_resources(ep);
	return 0;
}

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/*
 * Fake up a special CPL opcode and call sched() so process_work() will call
 * _put_ep_safe() in a safe context to free the ep resources.  This is needed
 * because ARP error handlers are called in an ATOMIC context, and
 * _c4iw_free_ep() needs to block.
 */
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static void queue_arp_failure_cpl(struct c4iw_ep *ep, struct sk_buff *skb,
				  int cpl)
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{
	struct cpl_act_establish *rpl = cplhdr(skb);

	/* Set our special ARP_FAILURE opcode */
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	rpl->ot.opcode = cpl;
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	/*
	 * Save ep in the skb->cb area, after where sched() will save the dev
	 * ptr.
	 */
	*((struct c4iw_ep **)(skb->cb + 2 * sizeof(void *))) = ep;
	sched(ep->com.dev, skb);
}

/* Handle an ARP failure for an accept */
static void pass_accept_rpl_arp_failure(void *handle, struct sk_buff *skb)
{
	struct c4iw_ep *ep = handle;

	pr_err(MOD "ARP failure during accept - tid %u -dropping connection\n",
	       ep->hwtid);

	__state_set(&ep->com, DEAD);
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	queue_arp_failure_cpl(ep, skb, FAKE_CPL_PASS_PUT_EP_SAFE);
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}

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/*
 * Handle an ARP failure for an active open.
 */
static void act_open_req_arp_failure(void *handle, struct sk_buff *skb)
{
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	struct c4iw_ep *ep = handle;

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	printk(KERN_ERR MOD "ARP failure during connect\n");
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	connect_reply_upcall(ep, -EHOSTUNREACH);
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	__state_set(&ep->com, DEAD);
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	if (ep->com.remote_addr.ss_family == AF_INET6) {
		struct sockaddr_in6 *sin6 =
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			(struct sockaddr_in6 *)&ep->com.local_addr;
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		cxgb4_clip_release(ep->com.dev->rdev.lldi.ports[0],
				   (const u32 *)&sin6->sin6_addr.s6_addr, 1);
	}
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	remove_handle(ep->com.dev, &ep->com.dev->atid_idr, ep->atid);
	cxgb4_free_atid(ep->com.dev->rdev.lldi.tids, ep->atid);
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	queue_arp_failure_cpl(ep, skb, FAKE_CPL_PUT_EP_SAFE);
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}

/*
 * 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(void *handle, struct sk_buff *skb)
{
	struct c4iw_rdev *rdev = handle;
	struct cpl_abort_req *req = cplhdr(skb);

	PDBG("%s rdev %p\n", __func__, rdev);
	req->cmd = CPL_ABORT_NO_RST;
	c4iw_ofld_send(rdev, skb);
}

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static int send_flowc(struct c4iw_ep *ep, struct sk_buff *skb)
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{
	unsigned int flowclen = 80;
	struct fw_flowc_wr *flowc;
	int i;
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	u16 vlan = ep->l2t->vlan;
	int nparams;

	if (vlan == CPL_L2T_VLAN_NONE)
		nparams = 8;
	else
		nparams = 9;
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	skb = get_skb(skb, flowclen, GFP_KERNEL);
	flowc = (struct fw_flowc_wr *)__skb_put(skb, flowclen);

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	flowc->op_to_nparams = cpu_to_be32(FW_WR_OP_V(FW_FLOWC_WR) |
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					   FW_FLOWC_WR_NPARAMS_V(nparams));
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	flowc->flowid_len16 = cpu_to_be32(FW_WR_LEN16_V(DIV_ROUND_UP(flowclen,
					  16)) | FW_WR_FLOWID_V(ep->hwtid));
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	flowc->mnemval[0].mnemonic = FW_FLOWC_MNEM_PFNVFN;
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	flowc->mnemval[0].val = cpu_to_be32(FW_PFVF_CMD_PFN_V
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					    (ep->com.dev->rdev.lldi.pf));
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	flowc->mnemval[1].mnemonic = FW_FLOWC_MNEM_CH;
	flowc->mnemval[1].val = cpu_to_be32(ep->tx_chan);
	flowc->mnemval[2].mnemonic = FW_FLOWC_MNEM_PORT;
	flowc->mnemval[2].val = cpu_to_be32(ep->tx_chan);
	flowc->mnemval[3].mnemonic = FW_FLOWC_MNEM_IQID;
	flowc->mnemval[3].val = cpu_to_be32(ep->rss_qid);
	flowc->mnemval[4].mnemonic = FW_FLOWC_MNEM_SNDNXT;
	flowc->mnemval[4].val = cpu_to_be32(ep->snd_seq);
	flowc->mnemval[5].mnemonic = FW_FLOWC_MNEM_RCVNXT;
	flowc->mnemval[5].val = cpu_to_be32(ep->rcv_seq);
	flowc->mnemval[6].mnemonic = FW_FLOWC_MNEM_SNDBUF;
586
	flowc->mnemval[6].val = cpu_to_be32(ep->snd_win);
587 588
	flowc->mnemval[7].mnemonic = FW_FLOWC_MNEM_MSS;
	flowc->mnemval[7].val = cpu_to_be32(ep->emss);
H
Hariprasad S 已提交
589 590 591 592 593 594 595 596 597 598 599
	if (nparams == 9) {
		u16 pri;

		pri = (vlan & VLAN_PRIO_MASK) >> VLAN_PRIO_SHIFT;
		flowc->mnemval[8].mnemonic = FW_FLOWC_MNEM_SCHEDCLASS;
		flowc->mnemval[8].val = cpu_to_be32(pri);
	} else {
		/* Pad WR to 16 byte boundary */
		flowc->mnemval[8].mnemonic = 0;
		flowc->mnemval[8].val = 0;
	}
600 601 602 603 604 605 606
	for (i = 0; i < 9; i++) {
		flowc->mnemval[i].r4[0] = 0;
		flowc->mnemval[i].r4[1] = 0;
		flowc->mnemval[i].r4[2] = 0;
	}

	set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
607
	return c4iw_ofld_send(&ep->com.dev->rdev, skb);
608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653
}

static int send_halfclose(struct c4iw_ep *ep, gfp_t gfp)
{
	struct cpl_close_con_req *req;
	struct sk_buff *skb;
	int wrlen = roundup(sizeof *req, 16);

	PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
	skb = get_skb(NULL, wrlen, gfp);
	if (!skb) {
		printk(KERN_ERR MOD "%s - failed to alloc skb\n", __func__);
		return -ENOMEM;
	}
	set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
	t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
	req = (struct cpl_close_con_req *) skb_put(skb, wrlen);
	memset(req, 0, wrlen);
	INIT_TP_WR(req, ep->hwtid);
	OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_CLOSE_CON_REQ,
						    ep->hwtid));
	return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
}

static int send_abort(struct c4iw_ep *ep, struct sk_buff *skb, gfp_t gfp)
{
	struct cpl_abort_req *req;
	int wrlen = roundup(sizeof *req, 16);

	PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
	skb = get_skb(skb, wrlen, gfp);
	if (!skb) {
		printk(KERN_ERR MOD "%s - failed to alloc skb.\n",
		       __func__);
		return -ENOMEM;
	}
	set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
	t4_set_arp_err_handler(skb, &ep->com.dev->rdev, abort_arp_failure);
	req = (struct cpl_abort_req *) skb_put(skb, wrlen);
	memset(req, 0, wrlen);
	INIT_TP_WR(req, ep->hwtid);
	OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_REQ, ep->hwtid));
	req->cmd = CPL_ABORT_SEND_RST;
	return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
}

654
static void best_mtu(const unsigned short *mtus, unsigned short mtu,
655
		     unsigned int *idx, int use_ts, int ipv6)
656
{
657 658 659
	unsigned short hdr_size = (ipv6 ?
				   sizeof(struct ipv6hdr) :
				   sizeof(struct iphdr)) +
660
				  sizeof(struct tcphdr) +
661 662
				  (use_ts ?
				   round_up(TCPOLEN_TIMESTAMP, 4) : 0);
663 664 665 666 667
	unsigned short data_size = mtu - hdr_size;

	cxgb4_best_aligned_mtu(mtus, hdr_size, data_size, 8, idx);
}

668 669
static int send_connect(struct c4iw_ep *ep)
{
670 671 672 673 674 675
	struct cpl_act_open_req *req = NULL;
	struct cpl_t5_act_open_req *t5req = NULL;
	struct cpl_t6_act_open_req *t6req = NULL;
	struct cpl_act_open_req6 *req6 = NULL;
	struct cpl_t5_act_open_req6 *t5req6 = NULL;
	struct cpl_t6_act_open_req6 *t6req6 = NULL;
676 677 678 679 680
	struct sk_buff *skb;
	u64 opt0;
	u32 opt2;
	unsigned int mtu_idx;
	int wscale;
681
	int win, sizev4, sizev6, wrlen;
682
	struct sockaddr_in *la = (struct sockaddr_in *)
683
				 &ep->com.local_addr;
684
	struct sockaddr_in *ra = (struct sockaddr_in *)
685
				 &ep->com.remote_addr;
686
	struct sockaddr_in6 *la6 = (struct sockaddr_in6 *)
687
				   &ep->com.local_addr;
688
	struct sockaddr_in6 *ra6 = (struct sockaddr_in6 *)
689
				   &ep->com.remote_addr;
H
Hariprasad S 已提交
690
	int ret;
691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711
	enum chip_type adapter_type = ep->com.dev->rdev.lldi.adapter_type;
	u32 isn = (prandom_u32() & ~7UL) - 1;

	switch (CHELSIO_CHIP_VERSION(adapter_type)) {
	case CHELSIO_T4:
		sizev4 = sizeof(struct cpl_act_open_req);
		sizev6 = sizeof(struct cpl_act_open_req6);
		break;
	case CHELSIO_T5:
		sizev4 = sizeof(struct cpl_t5_act_open_req);
		sizev6 = sizeof(struct cpl_t5_act_open_req6);
		break;
	case CHELSIO_T6:
		sizev4 = sizeof(struct cpl_t6_act_open_req);
		sizev6 = sizeof(struct cpl_t6_act_open_req6);
		break;
	default:
		pr_err("T%d Chip is not supported\n",
		       CHELSIO_CHIP_VERSION(adapter_type));
		return -EINVAL;
	}
712 713 714 715

	wrlen = (ep->com.remote_addr.ss_family == AF_INET) ?
			roundup(sizev4, 16) :
			roundup(sizev6, 16);
716 717 718 719 720 721 722 723 724

	PDBG("%s ep %p atid %u\n", __func__, ep, ep->atid);

	skb = get_skb(NULL, wrlen, GFP_KERNEL);
	if (!skb) {
		printk(KERN_ERR MOD "%s - failed to alloc skb.\n",
		       __func__);
		return -ENOMEM;
	}
S
Steve Wise 已提交
725
	set_wr_txq(skb, CPL_PRIORITY_SETUP, ep->ctrlq_idx);
726

727
	best_mtu(ep->com.dev->rdev.lldi.mtus, ep->mtu, &mtu_idx,
728 729
		 enable_tcp_timestamps,
		 (AF_INET == ep->com.remote_addr.ss_family) ? 0 : 1);
730
	wscale = compute_wscale(rcv_win);
731 732 733 734 735 736

	/*
	 * Specify the largest window that will fit in opt0. The
	 * remainder will be specified in the rx_data_ack.
	 */
	win = ep->rcv_win >> 10;
737 738
	if (win > RCV_BUFSIZ_M)
		win = RCV_BUFSIZ_M;
739

740
	opt0 = (nocong ? NO_CONG_F : 0) |
741
	       KEEP_ALIVE_F |
742
	       DELACK_F |
743 744 745 746 747
	       WND_SCALE_V(wscale) |
	       MSS_IDX_V(mtu_idx) |
	       L2T_IDX_V(ep->l2t->idx) |
	       TX_CHAN_V(ep->tx_chan) |
	       SMAC_SEL_V(ep->smac_idx) |
H
Hariprasad S 已提交
748
	       DSCP_V(ep->tos >> 2) |
749 750 751
	       ULP_MODE_V(ULP_MODE_TCPDDP) |
	       RCV_BUFSIZ_V(win);
	opt2 = RX_CHANNEL_V(0) |
752
	       CCTRL_ECN_V(enable_ecn) |
753
	       RSS_QUEUE_VALID_F | RSS_QUEUE_V(ep->rss_qid);
754
	if (enable_tcp_timestamps)
755
		opt2 |= TSTAMPS_EN_F;
756
	if (enable_tcp_sack)
757
		opt2 |= SACK_EN_F;
758
	if (wscale && enable_tcp_window_scaling)
759
		opt2 |= WND_SCALE_EN_F;
760 761 762 763
	if (CHELSIO_CHIP_VERSION(adapter_type) > CHELSIO_T4) {
		if (peer2peer)
			isn += 4;

764
		opt2 |= T5_OPT_2_VALID_F;
765
		opt2 |= CONG_CNTRL_V(CONG_ALG_TAHOE);
766
		opt2 |= T5_ISS_F;
767
	}
H
Hariprasad S 已提交
768 769 770 771 772

	if (ep->com.remote_addr.ss_family == AF_INET6)
		cxgb4_clip_get(ep->com.dev->rdev.lldi.ports[0],
			       (const u32 *)&la6->sin6_addr.s6_addr, 1);

773
	t4_set_arp_err_handler(skb, ep, act_open_req_arp_failure);
774

775 776 777 778
	if (ep->com.remote_addr.ss_family == AF_INET) {
		switch (CHELSIO_CHIP_VERSION(adapter_type)) {
		case CHELSIO_T4:
			req = (struct cpl_act_open_req *)skb_put(skb, wrlen);
779
			INIT_TP_WR(req, 0);
780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809
			break;
		case CHELSIO_T5:
			t5req = (struct cpl_t5_act_open_req *)skb_put(skb,
					wrlen);
			INIT_TP_WR(t5req, 0);
			req = (struct cpl_act_open_req *)t5req;
			break;
		case CHELSIO_T6:
			t6req = (struct cpl_t6_act_open_req *)skb_put(skb,
					wrlen);
			INIT_TP_WR(t6req, 0);
			req = (struct cpl_act_open_req *)t6req;
			t5req = (struct cpl_t5_act_open_req *)t6req;
			break;
		default:
			pr_err("T%d Chip is not supported\n",
			       CHELSIO_CHIP_VERSION(adapter_type));
			ret = -EINVAL;
			goto clip_release;
		}

		OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ,
					((ep->rss_qid<<14) | ep->atid)));
		req->local_port = la->sin_port;
		req->peer_port = ra->sin_port;
		req->local_ip = la->sin_addr.s_addr;
		req->peer_ip = ra->sin_addr.s_addr;
		req->opt0 = cpu_to_be64(opt0);

		if (is_t4(ep->com.dev->rdev.lldi.adapter_type)) {
810 811 812
			req->params = cpu_to_be32(cxgb4_select_ntuple(
						ep->com.dev->rdev.lldi.ports[0],
						ep->l2t));
813 814
			req->opt2 = cpu_to_be32(opt2);
		} else {
815 816 817 818 819 820 821 822 823 824 825
			t5req->params = cpu_to_be64(FILTER_TUPLE_V(
						cxgb4_select_ntuple(
						ep->com.dev->rdev.lldi.ports[0],
						ep->l2t)));
			t5req->rsvd = cpu_to_be32(isn);
			PDBG("%s snd_isn %u\n", __func__, t5req->rsvd);
			t5req->opt2 = cpu_to_be32(opt2);
		}
	} else {
		switch (CHELSIO_CHIP_VERSION(adapter_type)) {
		case CHELSIO_T4:
826 827
			req6 = (struct cpl_act_open_req6 *)skb_put(skb, wrlen);
			INIT_TP_WR(req6, 0);
828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859
			break;
		case CHELSIO_T5:
			t5req6 = (struct cpl_t5_act_open_req6 *)skb_put(skb,
					wrlen);
			INIT_TP_WR(t5req6, 0);
			req6 = (struct cpl_act_open_req6 *)t5req6;
			break;
		case CHELSIO_T6:
			t6req6 = (struct cpl_t6_act_open_req6 *)skb_put(skb,
					wrlen);
			INIT_TP_WR(t6req6, 0);
			req6 = (struct cpl_act_open_req6 *)t6req6;
			t5req6 = (struct cpl_t5_act_open_req6 *)t6req6;
			break;
		default:
			pr_err("T%d Chip is not supported\n",
			       CHELSIO_CHIP_VERSION(adapter_type));
			ret = -EINVAL;
			goto clip_release;
		}

		OPCODE_TID(req6) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ6,
					((ep->rss_qid<<14)|ep->atid)));
		req6->local_port = la6->sin6_port;
		req6->peer_port = ra6->sin6_port;
		req6->local_ip_hi = *((__be64 *)(la6->sin6_addr.s6_addr));
		req6->local_ip_lo = *((__be64 *)(la6->sin6_addr.s6_addr + 8));
		req6->peer_ip_hi = *((__be64 *)(ra6->sin6_addr.s6_addr));
		req6->peer_ip_lo = *((__be64 *)(ra6->sin6_addr.s6_addr + 8));
		req6->opt0 = cpu_to_be64(opt0);

		if (is_t4(ep->com.dev->rdev.lldi.adapter_type)) {
860 861 862
			req6->params = cpu_to_be32(cxgb4_select_ntuple(
						ep->com.dev->rdev.lldi.ports[0],
						ep->l2t));
863 864
			req6->opt2 = cpu_to_be32(opt2);
		} else {
865 866
			t5req6->params = cpu_to_be64(FILTER_TUPLE_V(
						cxgb4_select_ntuple(
867
						ep->com.dev->rdev.lldi.ports[0],
868
						ep->l2t)));
869 870 871
			t5req6->rsvd = cpu_to_be32(isn);
			PDBG("%s snd_isn %u\n", __func__, t5req6->rsvd);
			t5req6->opt2 = cpu_to_be32(opt2);
872
		}
873 874
	}

875
	set_bit(ACT_OPEN_REQ, &ep->com.history);
H
Hariprasad S 已提交
876
	ret = c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
877
clip_release:
H
Hariprasad S 已提交
878 879 880 881
	if (ret && ep->com.remote_addr.ss_family == AF_INET6)
		cxgb4_clip_release(ep->com.dev->rdev.lldi.ports[0],
				   (const u32 *)&la6->sin6_addr.s6_addr, 1);
	return ret;
882 883
}

884 885
static int send_mpa_req(struct c4iw_ep *ep, struct sk_buff *skb,
			u8 mpa_rev_to_use)
886
{
887
	int mpalen, wrlen, ret;
888 889
	struct fw_ofld_tx_data_wr *req;
	struct mpa_message *mpa;
890
	struct mpa_v2_conn_params mpa_v2_params;
891 892 893 894 895 896

	PDBG("%s ep %p tid %u pd_len %d\n", __func__, ep, ep->hwtid, ep->plen);

	BUG_ON(skb_cloned(skb));

	mpalen = sizeof(*mpa) + ep->plen;
897 898
	if (mpa_rev_to_use == 2)
		mpalen += sizeof(struct mpa_v2_conn_params);
899 900 901 902
	wrlen = roundup(mpalen + sizeof *req, 16);
	skb = get_skb(skb, wrlen, GFP_KERNEL);
	if (!skb) {
		connect_reply_upcall(ep, -ENOMEM);
903
		return -ENOMEM;
904 905 906 907 908 909
	}
	set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);

	req = (struct fw_ofld_tx_data_wr *)skb_put(skb, wrlen);
	memset(req, 0, wrlen);
	req->op_to_immdlen = cpu_to_be32(
910 911 912
		FW_WR_OP_V(FW_OFLD_TX_DATA_WR) |
		FW_WR_COMPL_F |
		FW_WR_IMMDLEN_V(mpalen));
913
	req->flowid_len16 = cpu_to_be32(
914 915
		FW_WR_FLOWID_V(ep->hwtid) |
		FW_WR_LEN16_V(wrlen >> 4));
916 917
	req->plen = cpu_to_be32(mpalen);
	req->tunnel_to_proxy = cpu_to_be32(
918 919
		FW_OFLD_TX_DATA_WR_FLUSH_F |
		FW_OFLD_TX_DATA_WR_SHOVE_F);
920 921 922 923

	mpa = (struct mpa_message *)(req + 1);
	memcpy(mpa->key, MPA_KEY_REQ, sizeof(mpa->key));
	mpa->flags = (crc_enabled ? MPA_CRC : 0) |
924 925
		     (markers_enabled ? MPA_MARKERS : 0) |
		     (mpa_rev_to_use == 2 ? MPA_ENHANCED_RDMA_CONN : 0);
926
	mpa->private_data_size = htons(ep->plen);
927
	mpa->revision = mpa_rev_to_use;
928
	if (mpa_rev_to_use == 1) {
929
		ep->tried_with_mpa_v1 = 1;
930 931
		ep->retry_with_mpa_v1 = 0;
	}
932 933

	if (mpa_rev_to_use == 2) {
934 935
		mpa->private_data_size = htons(ntohs(mpa->private_data_size) +
					       sizeof (struct mpa_v2_conn_params));
936 937
		PDBG("%s initiator ird %u ord %u\n", __func__, ep->ird,
		     ep->ord);
938 939 940 941 942 943 944 945 946 947 948 949 950 951
		mpa_v2_params.ird = htons((u16)ep->ird);
		mpa_v2_params.ord = htons((u16)ep->ord);

		if (peer2peer) {
			mpa_v2_params.ird |= htons(MPA_V2_PEER2PEER_MODEL);
			if (p2p_type == FW_RI_INIT_P2PTYPE_RDMA_WRITE)
				mpa_v2_params.ord |=
					htons(MPA_V2_RDMA_WRITE_RTR);
			else if (p2p_type == FW_RI_INIT_P2PTYPE_READ_REQ)
				mpa_v2_params.ord |=
					htons(MPA_V2_RDMA_READ_RTR);
		}
		memcpy(mpa->private_data, &mpa_v2_params,
		       sizeof(struct mpa_v2_conn_params));
952

953 954 955 956 957 958 959 960
		if (ep->plen)
			memcpy(mpa->private_data +
			       sizeof(struct mpa_v2_conn_params),
			       ep->mpa_pkt + sizeof(*mpa), ep->plen);
	} else
		if (ep->plen)
			memcpy(mpa->private_data,
					ep->mpa_pkt + sizeof(*mpa), ep->plen);
961 962 963 964 965 966 967 968 969 970

	/*
	 * Reference the mpa skb.  This ensures the data area
	 * will remain in memory until the hw acks the tx.
	 * Function fw4_ack() will deref it.
	 */
	skb_get(skb);
	t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
	BUG_ON(ep->mpa_skb);
	ep->mpa_skb = skb;
971 972 973
	ret = c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
	if (ret)
		return ret;
974
	start_ep_timer(ep);
975
	__state_set(&ep->com, MPA_REQ_SENT);
976
	ep->mpa_attr.initiator = 1;
977
	ep->snd_seq += mpalen;
978
	return ret;
979 980 981 982 983 984 985 986
}

static int send_mpa_reject(struct c4iw_ep *ep, const void *pdata, u8 plen)
{
	int mpalen, wrlen;
	struct fw_ofld_tx_data_wr *req;
	struct mpa_message *mpa;
	struct sk_buff *skb;
987
	struct mpa_v2_conn_params mpa_v2_params;
988 989 990 991

	PDBG("%s ep %p tid %u pd_len %d\n", __func__, ep, ep->hwtid, ep->plen);

	mpalen = sizeof(*mpa) + plen;
992 993
	if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn)
		mpalen += sizeof(struct mpa_v2_conn_params);
994 995 996 997 998 999 1000 1001 1002 1003 1004 1005
	wrlen = roundup(mpalen + sizeof *req, 16);

	skb = get_skb(NULL, wrlen, GFP_KERNEL);
	if (!skb) {
		printk(KERN_ERR MOD "%s - cannot alloc skb!\n", __func__);
		return -ENOMEM;
	}
	set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);

	req = (struct fw_ofld_tx_data_wr *)skb_put(skb, wrlen);
	memset(req, 0, wrlen);
	req->op_to_immdlen = cpu_to_be32(
1006 1007 1008
		FW_WR_OP_V(FW_OFLD_TX_DATA_WR) |
		FW_WR_COMPL_F |
		FW_WR_IMMDLEN_V(mpalen));
1009
	req->flowid_len16 = cpu_to_be32(
1010 1011
		FW_WR_FLOWID_V(ep->hwtid) |
		FW_WR_LEN16_V(wrlen >> 4));
1012 1013
	req->plen = cpu_to_be32(mpalen);
	req->tunnel_to_proxy = cpu_to_be32(
1014 1015
		FW_OFLD_TX_DATA_WR_FLUSH_F |
		FW_OFLD_TX_DATA_WR_SHOVE_F);
1016 1017 1018 1019 1020

	mpa = (struct mpa_message *)(req + 1);
	memset(mpa, 0, sizeof(*mpa));
	memcpy(mpa->key, MPA_KEY_REP, sizeof(mpa->key));
	mpa->flags = MPA_REJECT;
1021
	mpa->revision = ep->mpa_attr.version;
1022
	mpa->private_data_size = htons(plen);
1023 1024 1025

	if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) {
		mpa->flags |= MPA_ENHANCED_RDMA_CONN;
1026 1027
		mpa->private_data_size = htons(ntohs(mpa->private_data_size) +
					       sizeof (struct mpa_v2_conn_params));
1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045
		mpa_v2_params.ird = htons(((u16)ep->ird) |
					  (peer2peer ? MPA_V2_PEER2PEER_MODEL :
					   0));
		mpa_v2_params.ord = htons(((u16)ep->ord) | (peer2peer ?
					  (p2p_type ==
					   FW_RI_INIT_P2PTYPE_RDMA_WRITE ?
					   MPA_V2_RDMA_WRITE_RTR : p2p_type ==
					   FW_RI_INIT_P2PTYPE_READ_REQ ?
					   MPA_V2_RDMA_READ_RTR : 0) : 0));
		memcpy(mpa->private_data, &mpa_v2_params,
		       sizeof(struct mpa_v2_conn_params));

		if (ep->plen)
			memcpy(mpa->private_data +
			       sizeof(struct mpa_v2_conn_params), pdata, plen);
	} else
		if (plen)
			memcpy(mpa->private_data, pdata, plen);
1046 1047 1048 1049 1050 1051 1052 1053 1054 1055

	/*
	 * Reference the mpa skb again.  This ensures the data area
	 * will remain in memory until the hw acks the tx.
	 * Function fw4_ack() will deref it.
	 */
	skb_get(skb);
	set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
	BUG_ON(ep->mpa_skb);
	ep->mpa_skb = skb;
1056
	ep->snd_seq += mpalen;
1057 1058 1059 1060 1061 1062 1063 1064 1065
	return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
}

static int send_mpa_reply(struct c4iw_ep *ep, const void *pdata, u8 plen)
{
	int mpalen, wrlen;
	struct fw_ofld_tx_data_wr *req;
	struct mpa_message *mpa;
	struct sk_buff *skb;
1066
	struct mpa_v2_conn_params mpa_v2_params;
1067 1068 1069 1070

	PDBG("%s ep %p tid %u pd_len %d\n", __func__, ep, ep->hwtid, ep->plen);

	mpalen = sizeof(*mpa) + plen;
1071 1072
	if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn)
		mpalen += sizeof(struct mpa_v2_conn_params);
1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084
	wrlen = roundup(mpalen + sizeof *req, 16);

	skb = get_skb(NULL, wrlen, GFP_KERNEL);
	if (!skb) {
		printk(KERN_ERR MOD "%s - cannot alloc skb!\n", __func__);
		return -ENOMEM;
	}
	set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);

	req = (struct fw_ofld_tx_data_wr *) skb_put(skb, wrlen);
	memset(req, 0, wrlen);
	req->op_to_immdlen = cpu_to_be32(
1085 1086 1087
		FW_WR_OP_V(FW_OFLD_TX_DATA_WR) |
		FW_WR_COMPL_F |
		FW_WR_IMMDLEN_V(mpalen));
1088
	req->flowid_len16 = cpu_to_be32(
1089 1090
		FW_WR_FLOWID_V(ep->hwtid) |
		FW_WR_LEN16_V(wrlen >> 4));
1091 1092
	req->plen = cpu_to_be32(mpalen);
	req->tunnel_to_proxy = cpu_to_be32(
1093 1094
		FW_OFLD_TX_DATA_WR_FLUSH_F |
		FW_OFLD_TX_DATA_WR_SHOVE_F);
1095 1096 1097 1098 1099 1100

	mpa = (struct mpa_message *)(req + 1);
	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);
1101
	mpa->revision = ep->mpa_attr.version;
1102
	mpa->private_data_size = htons(plen);
1103 1104 1105

	if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) {
		mpa->flags |= MPA_ENHANCED_RDMA_CONN;
1106 1107
		mpa->private_data_size = htons(ntohs(mpa->private_data_size) +
					       sizeof (struct mpa_v2_conn_params));
1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130
		mpa_v2_params.ird = htons((u16)ep->ird);
		mpa_v2_params.ord = htons((u16)ep->ord);
		if (peer2peer && (ep->mpa_attr.p2p_type !=
					FW_RI_INIT_P2PTYPE_DISABLED)) {
			mpa_v2_params.ird |= htons(MPA_V2_PEER2PEER_MODEL);

			if (p2p_type == FW_RI_INIT_P2PTYPE_RDMA_WRITE)
				mpa_v2_params.ord |=
					htons(MPA_V2_RDMA_WRITE_RTR);
			else if (p2p_type == FW_RI_INIT_P2PTYPE_READ_REQ)
				mpa_v2_params.ord |=
					htons(MPA_V2_RDMA_READ_RTR);
		}

		memcpy(mpa->private_data, &mpa_v2_params,
		       sizeof(struct mpa_v2_conn_params));

		if (ep->plen)
			memcpy(mpa->private_data +
			       sizeof(struct mpa_v2_conn_params), pdata, plen);
	} else
		if (plen)
			memcpy(mpa->private_data, pdata, plen);
1131 1132 1133 1134 1135 1136 1137 1138

	/*
	 * Reference the mpa skb.  This ensures the data area
	 * will remain in memory until the hw acks the tx.
	 * Function fw4_ack() will deref it.
	 */
	skb_get(skb);
	ep->mpa_skb = skb;
1139
	__state_set(&ep->com, MPA_REP_SENT);
1140
	ep->snd_seq += mpalen;
1141 1142 1143 1144 1145 1146 1147 1148
	return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
}

static int act_establish(struct c4iw_dev *dev, struct sk_buff *skb)
{
	struct c4iw_ep *ep;
	struct cpl_act_establish *req = cplhdr(skb);
	unsigned int tid = GET_TID(req);
1149
	unsigned int atid = TID_TID_G(ntohl(req->tos_atid));
1150
	struct tid_info *t = dev->rdev.lldi.tids;
1151
	int ret;
1152 1153 1154 1155 1156 1157

	ep = lookup_atid(t, atid);

	PDBG("%s ep %p tid %u snd_isn %u rcv_isn %u\n", __func__, ep, tid,
	     be32_to_cpu(req->snd_isn), be32_to_cpu(req->rcv_isn));

1158
	mutex_lock(&ep->com.mutex);
1159 1160 1161 1162 1163
	dst_confirm(ep->dst);

	/* setup the hwtid for this connection */
	ep->hwtid = tid;
	cxgb4_insert_tid(t, ep, tid);
1164
	insert_handle(dev, &dev->hwtid_idr, ep, ep->hwtid);
1165 1166 1167 1168 1169 1170 1171

	ep->snd_seq = be32_to_cpu(req->snd_isn);
	ep->rcv_seq = be32_to_cpu(req->rcv_isn);

	set_emss(ep, ntohs(req->tcp_opt));

	/* dealloc the atid */
1172
	remove_handle(ep->com.dev, &ep->com.dev->atid_idr, atid);
1173
	cxgb4_free_atid(t, atid);
1174
	set_bit(ACT_ESTAB, &ep->com.history);
1175 1176

	/* start MPA negotiation */
1177 1178 1179
	ret = send_flowc(ep, NULL);
	if (ret)
		goto err;
1180
	if (ep->retry_with_mpa_v1)
1181
		ret = send_mpa_req(ep, skb, 1);
1182
	else
1183 1184 1185
		ret = send_mpa_req(ep, skb, mpa_rev);
	if (ret)
		goto err;
1186
	mutex_unlock(&ep->com.mutex);
1187
	return 0;
1188 1189 1190 1191 1192
err:
	mutex_unlock(&ep->com.mutex);
	connect_reply_upcall(ep, -ENOMEM);
	c4iw_ep_disconnect(ep, 0, GFP_KERNEL);
	return 0;
1193 1194
}

1195
static void close_complete_upcall(struct c4iw_ep *ep, int status)
1196 1197 1198 1199 1200 1201
{
	struct iw_cm_event event;

	PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
	memset(&event, 0, sizeof(event));
	event.event = IW_CM_EVENT_CLOSE;
1202
	event.status = status;
1203 1204 1205 1206
	if (ep->com.cm_id) {
		PDBG("close complete delivered ep %p cm_id %p tid %u\n",
		     ep, ep->com.cm_id, ep->hwtid);
		ep->com.cm_id->event_handler(ep->com.cm_id, &event);
1207
		deref_cm_id(&ep->com);
1208
		set_bit(CLOSE_UPCALL, &ep->com.history);
1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222
	}
}

static void peer_close_upcall(struct c4iw_ep *ep)
{
	struct iw_cm_event event;

	PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
	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 %u\n",
		     ep, ep->com.cm_id, ep->hwtid);
		ep->com.cm_id->event_handler(ep->com.cm_id, &event);
1223
		set_bit(DISCONN_UPCALL, &ep->com.history);
1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238
	}
}

static void peer_abort_upcall(struct c4iw_ep *ep)
{
	struct iw_cm_event event;

	PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
	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 %u\n", ep,
		     ep->com.cm_id, ep->hwtid);
		ep->com.cm_id->event_handler(ep->com.cm_id, &event);
1239
		deref_cm_id(&ep->com);
1240
		set_bit(ABORT_UPCALL, &ep->com.history);
1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251
	}
}

static void connect_reply_upcall(struct c4iw_ep *ep, int status)
{
	struct iw_cm_event event;

	PDBG("%s ep %p tid %u status %d\n", __func__, ep, ep->hwtid, status);
	memset(&event, 0, sizeof(event));
	event.event = IW_CM_EVENT_CONNECT_REPLY;
	event.status = status;
1252 1253 1254 1255
	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));
1256 1257

	if ((status == 0) || (status == -ECONNREFUSED)) {
1258 1259
		if (!ep->tried_with_mpa_v1) {
			/* this means MPA_v2 is used */
1260 1261
			event.ord = ep->ird;
			event.ird = ep->ord;
1262 1263 1264 1265 1266 1267 1268
			event.private_data_len = ep->plen -
				sizeof(struct mpa_v2_conn_params);
			event.private_data = ep->mpa_pkt +
				sizeof(struct mpa_message) +
				sizeof(struct mpa_v2_conn_params);
		} else {
			/* this means MPA_v1 is used */
1269 1270
			event.ord = cur_max_read_depth(ep->com.dev);
			event.ird = cur_max_read_depth(ep->com.dev);
1271 1272 1273 1274
			event.private_data_len = ep->plen;
			event.private_data = ep->mpa_pkt +
				sizeof(struct mpa_message);
		}
1275
	}
1276 1277 1278

	PDBG("%s ep %p tid %u status %d\n", __func__, ep,
	     ep->hwtid, status);
1279
	set_bit(CONN_RPL_UPCALL, &ep->com.history);
1280 1281
	ep->com.cm_id->event_handler(ep->com.cm_id, &event);

1282 1283
	if (status < 0)
		deref_cm_id(&ep->com);
1284 1285
}

1286
static int connect_request_upcall(struct c4iw_ep *ep)
1287 1288
{
	struct iw_cm_event event;
1289
	int ret;
1290 1291 1292 1293

	PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
	memset(&event, 0, sizeof(event));
	event.event = IW_CM_EVENT_CONNECT_REQUEST;
1294 1295 1296 1297
	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));
1298
	event.provider_data = ep;
1299 1300 1301 1302 1303 1304 1305 1306 1307 1308
	if (!ep->tried_with_mpa_v1) {
		/* this means MPA_v2 is used */
		event.ord = ep->ord;
		event.ird = ep->ird;
		event.private_data_len = ep->plen -
			sizeof(struct mpa_v2_conn_params);
		event.private_data = ep->mpa_pkt + sizeof(struct mpa_message) +
			sizeof(struct mpa_v2_conn_params);
	} else {
		/* this means MPA_v1 is used. Send max supported */
1309 1310
		event.ord = cur_max_read_depth(ep->com.dev);
		event.ird = cur_max_read_depth(ep->com.dev);
1311 1312 1313
		event.private_data_len = ep->plen;
		event.private_data = ep->mpa_pkt + sizeof(struct mpa_message);
	}
1314 1315 1316 1317 1318
	c4iw_get_ep(&ep->com);
	ret = ep->parent_ep->com.cm_id->event_handler(ep->parent_ep->com.cm_id,
						      &event);
	if (ret)
		c4iw_put_ep(&ep->com);
1319
	set_bit(CONNREQ_UPCALL, &ep->com.history);
1320
	c4iw_put_ep(&ep->parent_ep->com);
1321
	return ret;
1322 1323 1324 1325 1326 1327 1328 1329 1330
}

static void established_upcall(struct c4iw_ep *ep)
{
	struct iw_cm_event event;

	PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
	memset(&event, 0, sizeof(event));
	event.event = IW_CM_EVENT_ESTABLISHED;
1331 1332
	event.ird = ep->ord;
	event.ord = ep->ird;
1333 1334 1335
	if (ep->com.cm_id) {
		PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
		ep->com.cm_id->event_handler(ep->com.cm_id, &event);
1336
		set_bit(ESTAB_UPCALL, &ep->com.history);
1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352
	}
}

static int update_rx_credits(struct c4iw_ep *ep, u32 credits)
{
	struct cpl_rx_data_ack *req;
	struct sk_buff *skb;
	int wrlen = roundup(sizeof *req, 16);

	PDBG("%s ep %p tid %u credits %u\n", __func__, ep, ep->hwtid, credits);
	skb = get_skb(NULL, wrlen, GFP_KERNEL);
	if (!skb) {
		printk(KERN_ERR MOD "update_rx_credits - cannot alloc skb!\n");
		return 0;
	}

1353 1354 1355 1356 1357
	/*
	 * If we couldn't specify the entire rcv window at connection setup
	 * due to the limit in the number of bits in the RCV_BUFSIZ field,
	 * then add the overage in to the credits returned.
	 */
1358 1359
	if (ep->rcv_win > RCV_BUFSIZ_M * 1024)
		credits += ep->rcv_win - RCV_BUFSIZ_M * 1024;
1360

1361 1362 1363 1364 1365
	req = (struct cpl_rx_data_ack *) skb_put(skb, wrlen);
	memset(req, 0, wrlen);
	INIT_TP_WR(req, ep->hwtid);
	OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_RX_DATA_ACK,
						    ep->hwtid));
1366
	req->credit_dack = cpu_to_be32(credits | RX_FORCE_ACK_F |
1367 1368
				       RX_DACK_CHANGE_F |
				       RX_DACK_MODE_V(dack_mode));
S
Steve Wise 已提交
1369
	set_wr_txq(skb, CPL_PRIORITY_ACK, ep->ctrlq_idx);
1370 1371 1372 1373
	c4iw_ofld_send(&ep->com.dev->rdev, skb);
	return credits;
}

1374 1375
#define RELAXED_IRD_NEGOTIATION 1

1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387
/*
 * process_mpa_reply - process streaming mode MPA reply
 *
 * Returns:
 *
 * 0 upon success indicating a connect request was delivered to the ULP
 * or the mpa request is incomplete but valid so far.
 *
 * 1 if a failure requires the caller to close the connection.
 *
 * 2 if a failure requires the caller to abort the connection.
 */
1388
static int process_mpa_reply(struct c4iw_ep *ep, struct sk_buff *skb)
1389 1390
{
	struct mpa_message *mpa;
1391
	struct mpa_v2_conn_params *mpa_v2_params;
1392
	u16 plen;
1393 1394
	u16 resp_ird, resp_ord;
	u8 rtr_mismatch = 0, insuff_ird = 0;
1395 1396 1397
	struct c4iw_qp_attributes attrs;
	enum c4iw_qp_attr_mask mask;
	int err;
1398
	int disconnect = 0;
1399 1400 1401 1402 1403 1404 1405 1406 1407

	PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);

	/*
	 * 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;
1408
		goto err_stop_timer;
1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421
	}

	/*
	 * 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))
1422
		return 0;
1423 1424 1425
	mpa = (struct mpa_message *) ep->mpa_pkt;

	/* Validate MPA header. */
1426 1427 1428
	if (mpa->revision > mpa_rev) {
		printk(KERN_ERR MOD "%s MPA version mismatch. Local = %d,"
		       " Received = %d\n", __func__, mpa_rev, mpa->revision);
1429
		err = -EPROTO;
1430
		goto err_stop_timer;
1431 1432 1433
	}
	if (memcmp(mpa->key, MPA_KEY_REP, sizeof(mpa->key))) {
		err = -EPROTO;
1434
		goto err_stop_timer;
1435 1436 1437 1438 1439 1440 1441 1442 1443
	}

	plen = ntohs(mpa->private_data_size);

	/*
	 * Fail if there's too much private data.
	 */
	if (plen > MPA_MAX_PRIVATE_DATA) {
		err = -EPROTO;
1444
		goto err_stop_timer;
1445 1446 1447 1448 1449 1450 1451
	}

	/*
	 * If plen does not account for pkt size
	 */
	if (ep->mpa_pkt_len > (sizeof(*mpa) + plen)) {
		err = -EPROTO;
1452
		goto err_stop_timer;
1453 1454 1455 1456 1457 1458 1459 1460 1461
	}

	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))
1462
		return 0;
1463 1464 1465

	if (mpa->flags & MPA_REJECT) {
		err = -ECONNREFUSED;
1466
		goto err_stop_timer;
1467 1468
	}

1469 1470 1471 1472 1473 1474 1475 1476
	/*
	 * Stop mpa timer.  If it expired, then
	 * we ignore the MPA reply.  process_timeout()
	 * will abort the connection.
	 */
	if (stop_ep_timer(ep))
		return 0;

1477 1478 1479 1480 1481
	/*
	 * If we get here we have accumulated the entire mpa
	 * start reply message including private data. And
	 * the MPA header is valid.
	 */
1482
	__state_set(&ep->com, FPDU_MODE);
1483 1484 1485
	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;
1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498
	ep->mpa_attr.version = mpa->revision;
	ep->mpa_attr.p2p_type = FW_RI_INIT_P2PTYPE_DISABLED;

	if (mpa->revision == 2) {
		ep->mpa_attr.enhanced_rdma_conn =
			mpa->flags & MPA_ENHANCED_RDMA_CONN ? 1 : 0;
		if (ep->mpa_attr.enhanced_rdma_conn) {
			mpa_v2_params = (struct mpa_v2_conn_params *)
				(ep->mpa_pkt + sizeof(*mpa));
			resp_ird = ntohs(mpa_v2_params->ird) &
				MPA_V2_IRD_ORD_MASK;
			resp_ord = ntohs(mpa_v2_params->ord) &
				MPA_V2_IRD_ORD_MASK;
1499 1500
			PDBG("%s responder ird %u ord %u ep ird %u ord %u\n",
			     __func__, resp_ird, resp_ord, ep->ird, ep->ord);
1501 1502 1503 1504 1505 1506

			/*
			 * This is a double-check. Ideally, below checks are
			 * not required since ird/ord stuff has been taken
			 * care of in c4iw_accept_cr
			 */
1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522
			if (ep->ird < resp_ord) {
				if (RELAXED_IRD_NEGOTIATION && resp_ord <=
				    ep->com.dev->rdev.lldi.max_ordird_qp)
					ep->ird = resp_ord;
				else
					insuff_ird = 1;
			} else if (ep->ird > resp_ord) {
				ep->ird = resp_ord;
			}
			if (ep->ord > resp_ird) {
				if (RELAXED_IRD_NEGOTIATION)
					ep->ord = resp_ird;
				else
					insuff_ird = 1;
			}
			if (insuff_ird) {
1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543
				err = -ENOMEM;
				ep->ird = resp_ord;
				ep->ord = resp_ird;
			}

			if (ntohs(mpa_v2_params->ird) &
					MPA_V2_PEER2PEER_MODEL) {
				if (ntohs(mpa_v2_params->ord) &
						MPA_V2_RDMA_WRITE_RTR)
					ep->mpa_attr.p2p_type =
						FW_RI_INIT_P2PTYPE_RDMA_WRITE;
				else if (ntohs(mpa_v2_params->ord) &
						MPA_V2_RDMA_READ_RTR)
					ep->mpa_attr.p2p_type =
						FW_RI_INIT_P2PTYPE_READ_REQ;
			}
		}
	} else if (mpa->revision == 1)
		if (peer2peer)
			ep->mpa_attr.p2p_type = p2p_type;

1544
	PDBG("%s - crc_enabled=%d, recv_marker_enabled=%d, "
1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556
	     "xmit_marker_enabled=%d, version=%d p2p_type=%d local-p2p_type = "
	     "%d\n", __func__, ep->mpa_attr.crc_enabled,
	     ep->mpa_attr.recv_marker_enabled,
	     ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version,
	     ep->mpa_attr.p2p_type, p2p_type);

	/*
	 * If responder's RTR does not match with that of initiator, assign
	 * FW_RI_INIT_P2PTYPE_DISABLED in mpa attributes so that RTR is not
	 * generated when moving QP to RTS state.
	 * A TERM message will be sent after QP has moved to RTS state
	 */
1557
	if ((ep->mpa_attr.version == 2) && peer2peer &&
1558 1559 1560 1561
			(ep->mpa_attr.p2p_type != p2p_type)) {
		ep->mpa_attr.p2p_type = FW_RI_INIT_P2PTYPE_DISABLED;
		rtr_mismatch = 1;
	}
1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577

	attrs.mpa_attr = ep->mpa_attr;
	attrs.max_ird = ep->ird;
	attrs.max_ord = ep->ord;
	attrs.llp_stream_handle = ep;
	attrs.next_state = C4IW_QP_STATE_RTS;

	mask = C4IW_QP_ATTR_NEXT_STATE |
	    C4IW_QP_ATTR_LLP_STREAM_HANDLE | C4IW_QP_ATTR_MPA_ATTR |
	    C4IW_QP_ATTR_MAX_IRD | C4IW_QP_ATTR_MAX_ORD;

	/* bind QP and TID with INIT_WR */
	err = c4iw_modify_qp(ep->com.qp->rhp,
			     ep->com.qp, mask, &attrs, 1);
	if (err)
		goto err;
1578 1579 1580 1581 1582 1583 1584 1585 1586 1587

	/*
	 * If responder's RTR requirement did not match with what initiator
	 * supports, generate TERM message
	 */
	if (rtr_mismatch) {
		printk(KERN_ERR "%s: RTR mismatch, sending TERM\n", __func__);
		attrs.layer_etype = LAYER_MPA | DDP_LLP;
		attrs.ecode = MPA_NOMATCH_RTR;
		attrs.next_state = C4IW_QP_STATE_TERMINATE;
1588
		attrs.send_term = 1;
1589
		err = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
1590
				C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
1591
		err = -ENOMEM;
1592
		disconnect = 1;
1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607
		goto out;
	}

	/*
	 * Generate TERM if initiator IRD is not sufficient for responder
	 * provided ORD. Currently, we do the same behaviour even when
	 * responder provided IRD is also not sufficient as regards to
	 * initiator ORD.
	 */
	if (insuff_ird) {
		printk(KERN_ERR "%s: Insufficient IRD, sending TERM\n",
				__func__);
		attrs.layer_etype = LAYER_MPA | DDP_LLP;
		attrs.ecode = MPA_INSUFF_IRD;
		attrs.next_state = C4IW_QP_STATE_TERMINATE;
1608
		attrs.send_term = 1;
1609
		err = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
1610
				C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
1611
		err = -ENOMEM;
1612
		disconnect = 1;
1613 1614
		goto out;
	}
1615
	goto out;
1616 1617
err_stop_timer:
	stop_ep_timer(ep);
1618
err:
1619
	disconnect = 2;
1620 1621
out:
	connect_reply_upcall(ep, err);
1622
	return disconnect;
1623 1624
}

1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637
/*
 * process_mpa_request - process streaming mode MPA request
 *
 * Returns:
 *
 * 0 upon success indicating a connect request was delivered to the ULP
 * or the mpa request is incomplete but valid so far.
 *
 * 1 if a failure requires the caller to close the connection.
 *
 * 2 if a failure requires the caller to abort the connection.
 */
static int process_mpa_request(struct c4iw_ep *ep, struct sk_buff *skb)
1638 1639
{
	struct mpa_message *mpa;
1640
	struct mpa_v2_conn_params *mpa_v2_params;
1641 1642 1643 1644 1645 1646 1647 1648
	u16 plen;

	PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);

	/*
	 * If we get more than the supported amount of private data
	 * then we must fail this connection.
	 */
1649 1650
	if (ep->mpa_pkt_len + skb->len > sizeof(ep->mpa_pkt))
		goto err_stop_timer;
1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665

	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))
1666
		return 0;
1667 1668 1669 1670 1671 1672 1673

	PDBG("%s enter (%s line %u)\n", __func__, __FILE__, __LINE__);
	mpa = (struct mpa_message *) ep->mpa_pkt;

	/*
	 * Validate MPA Header.
	 */
1674 1675 1676
	if (mpa->revision > mpa_rev) {
		printk(KERN_ERR MOD "%s MPA version mismatch. Local = %d,"
		       " Received = %d\n", __func__, mpa_rev, mpa->revision);
1677
		goto err_stop_timer;
1678 1679
	}

1680 1681
	if (memcmp(mpa->key, MPA_KEY_REQ, sizeof(mpa->key)))
		goto err_stop_timer;
1682 1683 1684 1685 1686 1687

	plen = ntohs(mpa->private_data_size);

	/*
	 * Fail if there's too much private data.
	 */
1688 1689
	if (plen > MPA_MAX_PRIVATE_DATA)
		goto err_stop_timer;
1690 1691 1692 1693

	/*
	 * If plen does not account for pkt size
	 */
1694 1695
	if (ep->mpa_pkt_len > (sizeof(*mpa) + plen))
		goto err_stop_timer;
1696 1697 1698 1699 1700 1701
	ep->plen = (u8) plen;

	/*
	 * If we don't have all the pdata yet, then bail.
	 */
	if (ep->mpa_pkt_len < (sizeof(*mpa) + plen))
1702
		return 0;
1703 1704 1705 1706 1707 1708 1709 1710 1711

	/*
	 * 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;
1712 1713 1714 1715 1716 1717 1718 1719 1720 1721 1722 1723 1724 1725 1726
	ep->mpa_attr.version = mpa->revision;
	if (mpa->revision == 1)
		ep->tried_with_mpa_v1 = 1;
	ep->mpa_attr.p2p_type = FW_RI_INIT_P2PTYPE_DISABLED;

	if (mpa->revision == 2) {
		ep->mpa_attr.enhanced_rdma_conn =
			mpa->flags & MPA_ENHANCED_RDMA_CONN ? 1 : 0;
		if (ep->mpa_attr.enhanced_rdma_conn) {
			mpa_v2_params = (struct mpa_v2_conn_params *)
				(ep->mpa_pkt + sizeof(*mpa));
			ep->ird = ntohs(mpa_v2_params->ird) &
				MPA_V2_IRD_ORD_MASK;
			ep->ord = ntohs(mpa_v2_params->ord) &
				MPA_V2_IRD_ORD_MASK;
1727 1728
			PDBG("%s initiator ird %u ord %u\n", __func__, ep->ird,
			     ep->ord);
1729 1730 1731 1732 1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744
			if (ntohs(mpa_v2_params->ird) & MPA_V2_PEER2PEER_MODEL)
				if (peer2peer) {
					if (ntohs(mpa_v2_params->ord) &
							MPA_V2_RDMA_WRITE_RTR)
						ep->mpa_attr.p2p_type =
						FW_RI_INIT_P2PTYPE_RDMA_WRITE;
					else if (ntohs(mpa_v2_params->ord) &
							MPA_V2_RDMA_READ_RTR)
						ep->mpa_attr.p2p_type =
						FW_RI_INIT_P2PTYPE_READ_REQ;
				}
		}
	} else if (mpa->revision == 1)
		if (peer2peer)
			ep->mpa_attr.p2p_type = p2p_type;

1745 1746 1747 1748 1749 1750
	PDBG("%s - crc_enabled=%d, recv_marker_enabled=%d, "
	     "xmit_marker_enabled=%d, version=%d p2p_type=%d\n", __func__,
	     ep->mpa_attr.crc_enabled, ep->mpa_attr.recv_marker_enabled,
	     ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version,
	     ep->mpa_attr.p2p_type);

1751 1752 1753 1754 1755 1756
	__state_set(&ep->com, MPA_REQ_RCVD);

	/* drive upcall */
	mutex_lock_nested(&ep->parent_ep->com.mutex, SINGLE_DEPTH_NESTING);
	if (ep->parent_ep->com.state != DEAD) {
		if (connect_request_upcall(ep))
1757
			goto err_unlock_parent;
1758 1759
	} else {
		goto err_unlock_parent;
1760
	}
1761
	mutex_unlock(&ep->parent_ep->com.mutex);
1762 1763 1764 1765 1766 1767 1768 1769 1770
	return 0;

err_unlock_parent:
	mutex_unlock(&ep->parent_ep->com.mutex);
	goto err_out;
err_stop_timer:
	(void)stop_ep_timer(ep);
err_out:
	return 2;
1771 1772 1773 1774 1775 1776 1777 1778 1779
}

static int rx_data(struct c4iw_dev *dev, struct sk_buff *skb)
{
	struct c4iw_ep *ep;
	struct cpl_rx_data *hdr = cplhdr(skb);
	unsigned int dlen = ntohs(hdr->len);
	unsigned int tid = GET_TID(hdr);
	struct tid_info *t = dev->rdev.lldi.tids;
1780
	__u8 status = hdr->status;
1781
	int disconnect = 0;
1782 1783

	ep = lookup_tid(t, tid);
1784 1785
	if (!ep)
		return 0;
1786 1787 1788
	PDBG("%s ep %p tid %u dlen %u\n", __func__, ep, ep->hwtid, dlen);
	skb_pull(skb, sizeof(*hdr));
	skb_trim(skb, dlen);
1789
	mutex_lock(&ep->com.mutex);
1790 1791 1792 1793

	/* update RX credits */
	update_rx_credits(ep, dlen);

1794
	switch (ep->com.state) {
1795
	case MPA_REQ_SENT:
1796
		ep->rcv_seq += dlen;
1797
		disconnect = process_mpa_reply(ep, skb);
1798 1799
		break;
	case MPA_REQ_WAIT:
1800
		ep->rcv_seq += dlen;
1801 1802
		process_mpa_request(ep, skb);
		break;
1803 1804 1805
	case FPDU_MODE: {
		struct c4iw_qp_attributes attrs;
		BUG_ON(!ep->com.qp);
1806
		if (status)
1807
			pr_err("%s Unexpected streaming data." \
1808 1809
			       " qpid %u ep %p state %d tid %u status %d\n",
			       __func__, ep->com.qp->wq.sq.qid, ep,
1810
			       ep->com.state, ep->hwtid, status);
1811
		attrs.next_state = C4IW_QP_STATE_TERMINATE;
1812
		c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
1813 1814
			       C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
		disconnect = 1;
1815 1816
		break;
	}
1817 1818 1819
	default:
		break;
	}
1820
	mutex_unlock(&ep->com.mutex);
1821 1822
	if (disconnect)
		c4iw_ep_disconnect(ep, 0, GFP_KERNEL);
1823 1824 1825 1826 1827 1828 1829 1830 1831 1832 1833 1834
	return 0;
}

static int abort_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
{
	struct c4iw_ep *ep;
	struct cpl_abort_rpl_rss *rpl = cplhdr(skb);
	int release = 0;
	unsigned int tid = GET_TID(rpl);
	struct tid_info *t = dev->rdev.lldi.tids;

	ep = lookup_tid(t, tid);
1835 1836 1837 1838
	if (!ep) {
		printk(KERN_WARNING MOD "Abort rpl to freed endpoint\n");
		return 0;
	}
1839
	PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1840
	mutex_lock(&ep->com.mutex);
1841 1842
	switch (ep->com.state) {
	case ABORTING:
1843
		c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
1844 1845 1846 1847 1848 1849 1850 1851
		__state_set(&ep->com, DEAD);
		release = 1;
		break;
	default:
		printk(KERN_ERR "%s ep %p state %d\n",
		     __func__, ep, ep->com.state);
		break;
	}
1852
	mutex_unlock(&ep->com.mutex);
1853 1854 1855 1856 1857 1858

	if (release)
		release_ep_resources(ep);
	return 0;
}

1859
static int send_fw_act_open_req(struct c4iw_ep *ep, unsigned int atid)
1860 1861 1862 1863 1864
{
	struct sk_buff *skb;
	struct fw_ofld_connection_wr *req;
	unsigned int mtu_idx;
	int wscale;
1865
	struct sockaddr_in *sin;
1866
	int win;
1867 1868 1869 1870

	skb = get_skb(NULL, sizeof(*req), GFP_KERNEL);
	req = (struct fw_ofld_connection_wr *)__skb_put(skb, sizeof(*req));
	memset(req, 0, sizeof(*req));
1871
	req->op_compl = htonl(WR_OP_V(FW_OFLD_CONNECTION_WR));
1872
	req->len16_pkd = htonl(FW_WR_LEN16_V(DIV_ROUND_UP(sizeof(*req), 16)));
1873 1874
	req->le.filter = cpu_to_be32(cxgb4_select_ntuple(
				     ep->com.dev->rdev.lldi.ports[0],
1875
				     ep->l2t));
1876
	sin = (struct sockaddr_in *)&ep->com.local_addr;
1877 1878
	req->le.lport = sin->sin_port;
	req->le.u.ipv4.lip = sin->sin_addr.s_addr;
1879
	sin = (struct sockaddr_in *)&ep->com.remote_addr;
1880 1881
	req->le.pport = sin->sin_port;
	req->le.u.ipv4.pip = sin->sin_addr.s_addr;
1882
	req->tcb.t_state_to_astid =
1883 1884
			htonl(FW_OFLD_CONNECTION_WR_T_STATE_V(TCP_SYN_SENT) |
			FW_OFLD_CONNECTION_WR_ASTID_V(atid));
1885
	req->tcb.cplrxdataack_cplpassacceptrpl =
1886
			htons(FW_OFLD_CONNECTION_WR_CPLRXDATAACK_F);
1887
	req->tcb.tx_max = (__force __be32) jiffies;
1888
	req->tcb.rcv_adv = htons(1);
1889
	best_mtu(ep->com.dev->rdev.lldi.mtus, ep->mtu, &mtu_idx,
1890 1891
		 enable_tcp_timestamps,
		 (AF_INET == ep->com.remote_addr.ss_family) ? 0 : 1);
1892
	wscale = compute_wscale(rcv_win);
1893 1894 1895 1896 1897 1898

	/*
	 * Specify the largest window that will fit in opt0. The
	 * remainder will be specified in the rx_data_ack.
	 */
	win = ep->rcv_win >> 10;
1899 1900
	if (win > RCV_BUFSIZ_M)
		win = RCV_BUFSIZ_M;
1901

1902 1903
	req->tcb.opt0 = (__force __be64) (TCAM_BYPASS_F |
		(nocong ? NO_CONG_F : 0) |
1904
		KEEP_ALIVE_F |
1905
		DELACK_F |
1906 1907 1908 1909 1910
		WND_SCALE_V(wscale) |
		MSS_IDX_V(mtu_idx) |
		L2T_IDX_V(ep->l2t->idx) |
		TX_CHAN_V(ep->tx_chan) |
		SMAC_SEL_V(ep->smac_idx) |
H
Hariprasad S 已提交
1911
		DSCP_V(ep->tos >> 2) |
1912 1913
		ULP_MODE_V(ULP_MODE_TCPDDP) |
		RCV_BUFSIZ_V(win));
1914 1915
	req->tcb.opt2 = (__force __be32) (PACE_V(1) |
		TX_QUEUE_V(ep->com.dev->rdev.lldi.tx_modq[ep->tx_chan]) |
1916
		RX_CHANNEL_V(0) |
1917
		CCTRL_ECN_V(enable_ecn) |
1918
		RSS_QUEUE_VALID_F | RSS_QUEUE_V(ep->rss_qid));
1919
	if (enable_tcp_timestamps)
1920
		req->tcb.opt2 |= (__force __be32)TSTAMPS_EN_F;
1921
	if (enable_tcp_sack)
1922
		req->tcb.opt2 |= (__force __be32)SACK_EN_F;
1923
	if (wscale && enable_tcp_window_scaling)
1924 1925 1926
		req->tcb.opt2 |= (__force __be32)WND_SCALE_EN_F;
	req->tcb.opt0 = cpu_to_be64((__force u64)req->tcb.opt0);
	req->tcb.opt2 = cpu_to_be32((__force u32)req->tcb.opt2);
1927 1928
	set_wr_txq(skb, CPL_PRIORITY_CONTROL, ep->ctrlq_idx);
	set_bit(ACT_OFLD_CONN, &ep->com.history);
1929
	return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
1930 1931
}

1932 1933 1934 1935 1936 1937 1938 1939 1940
/*
 * 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;
}

1941 1942 1943 1944 1945 1946 1947 1948 1949
/* Returns whether a CPL status conveys negative advice.
 */
static int is_neg_adv(unsigned int status)
{
	return status == CPL_ERR_RTX_NEG_ADVICE ||
	       status == CPL_ERR_PERSIST_NEG_ADVICE ||
	       status == CPL_ERR_KEEPALV_NEG_ADVICE;
}

1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963
static char *neg_adv_str(unsigned int status)
{
	switch (status) {
	case CPL_ERR_RTX_NEG_ADVICE:
		return "Retransmit timeout";
	case CPL_ERR_PERSIST_NEG_ADVICE:
		return "Persist timeout";
	case CPL_ERR_KEEPALV_NEG_ADVICE:
		return "Keepalive timeout";
	default:
		return "Unknown";
	}
}

1964 1965 1966 1967 1968 1969 1970
static void set_tcp_window(struct c4iw_ep *ep, struct port_info *pi)
{
	ep->snd_win = snd_win;
	ep->rcv_win = rcv_win;
	PDBG("%s snd_win %d rcv_win %d\n", __func__, ep->snd_win, ep->rcv_win);
}

1971 1972
#define ACT_OPEN_RETRY_COUNT 2

1973 1974
static int import_ep(struct c4iw_ep *ep, int iptype, __u8 *peer_ip,
		     struct dst_entry *dst, struct c4iw_dev *cdev,
H
Hariprasad S 已提交
1975
		     bool clear_mpa_v1, enum chip_type adapter_type, u8 tos)
1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004
{
	struct neighbour *n;
	int err, step;
	struct net_device *pdev;

	n = dst_neigh_lookup(dst, peer_ip);
	if (!n)
		return -ENODEV;

	rcu_read_lock();
	err = -ENOMEM;
	if (n->dev->flags & IFF_LOOPBACK) {
		if (iptype == 4)
			pdev = ip_dev_find(&init_net, *(__be32 *)peer_ip);
		else if (IS_ENABLED(CONFIG_IPV6))
			for_each_netdev(&init_net, pdev) {
				if (ipv6_chk_addr(&init_net,
						  (struct in6_addr *)peer_ip,
						  pdev, 1))
					break;
			}
		else
			pdev = NULL;

		if (!pdev) {
			err = -ENODEV;
			goto out;
		}
		ep->l2t = cxgb4_l2t_get(cdev->rdev.lldi.l2t,
H
Hariprasad S 已提交
2005
					n, pdev, rt_tos2priority(tos));
2006 2007 2008 2009
		if (!ep->l2t)
			goto out;
		ep->mtu = pdev->mtu;
		ep->tx_chan = cxgb4_port_chan(pdev);
2010 2011
		ep->smac_idx = cxgb4_tp_smt_idx(adapter_type,
						cxgb4_port_viid(pdev));
2012 2013 2014 2015 2016 2017 2018 2019
		step = cdev->rdev.lldi.ntxq /
			cdev->rdev.lldi.nchan;
		ep->txq_idx = cxgb4_port_idx(pdev) * step;
		step = cdev->rdev.lldi.nrxq /
			cdev->rdev.lldi.nchan;
		ep->ctrlq_idx = cxgb4_port_idx(pdev);
		ep->rss_qid = cdev->rdev.lldi.rxq_ids[
			cxgb4_port_idx(pdev) * step];
2020
		set_tcp_window(ep, (struct port_info *)netdev_priv(pdev));
2021 2022 2023 2024 2025 2026 2027 2028
		dev_put(pdev);
	} else {
		pdev = get_real_dev(n->dev);
		ep->l2t = cxgb4_l2t_get(cdev->rdev.lldi.l2t,
					n, pdev, 0);
		if (!ep->l2t)
			goto out;
		ep->mtu = dst_mtu(dst);
S
Steve Wise 已提交
2029
		ep->tx_chan = cxgb4_port_chan(pdev);
2030 2031
		ep->smac_idx = cxgb4_tp_smt_idx(adapter_type,
						cxgb4_port_viid(pdev));
2032 2033
		step = cdev->rdev.lldi.ntxq /
			cdev->rdev.lldi.nchan;
S
Steve Wise 已提交
2034 2035
		ep->txq_idx = cxgb4_port_idx(pdev) * step;
		ep->ctrlq_idx = cxgb4_port_idx(pdev);
2036 2037 2038
		step = cdev->rdev.lldi.nrxq /
			cdev->rdev.lldi.nchan;
		ep->rss_qid = cdev->rdev.lldi.rxq_ids[
S
Steve Wise 已提交
2039
			cxgb4_port_idx(pdev) * step];
2040
		set_tcp_window(ep, (struct port_info *)netdev_priv(pdev));
2041 2042 2043 2044 2045 2046 2047 2048 2049 2050 2051 2052 2053 2054 2055

		if (clear_mpa_v1) {
			ep->retry_with_mpa_v1 = 0;
			ep->tried_with_mpa_v1 = 0;
		}
	}
	err = 0;
out:
	rcu_read_unlock();

	neigh_release(n);

	return err;
}

2056 2057 2058
static int c4iw_reconnect(struct c4iw_ep *ep)
{
	int err = 0;
2059
	struct sockaddr_in *laddr = (struct sockaddr_in *)
2060
				    &ep->com.cm_id->m_local_addr;
2061
	struct sockaddr_in *raddr = (struct sockaddr_in *)
2062
				    &ep->com.cm_id->m_remote_addr;
2063
	struct sockaddr_in6 *laddr6 = (struct sockaddr_in6 *)
2064
				      &ep->com.cm_id->m_local_addr;
2065
	struct sockaddr_in6 *raddr6 = (struct sockaddr_in6 *)
2066
				      &ep->com.cm_id->m_remote_addr;
2067 2068
	int iptype;
	__u8 *ra;
2069 2070 2071 2072 2073 2074 2075 2076 2077 2078 2079 2080 2081 2082 2083 2084

	PDBG("%s qp %p cm_id %p\n", __func__, ep->com.qp, ep->com.cm_id);
	init_timer(&ep->timer);

	/*
	 * Allocate an active TID to initiate a TCP connection.
	 */
	ep->atid = cxgb4_alloc_atid(ep->com.dev->rdev.lldi.tids, ep);
	if (ep->atid == -1) {
		pr_err("%s - cannot alloc atid.\n", __func__);
		err = -ENOMEM;
		goto fail2;
	}
	insert_handle(ep->com.dev, &ep->com.dev->atid_idr, ep, ep->atid);

	/* find a route */
2085
	if (ep->com.cm_id->m_local_addr.ss_family == AF_INET) {
2086 2087
		ep->dst = find_route(ep->com.dev, laddr->sin_addr.s_addr,
				     raddr->sin_addr.s_addr, laddr->sin_port,
H
Hariprasad S 已提交
2088
				     raddr->sin_port, ep->com.cm_id->tos);
2089 2090 2091 2092 2093 2094 2095 2096 2097 2098 2099
		iptype = 4;
		ra = (__u8 *)&raddr->sin_addr;
	} else {
		ep->dst = find_route6(ep->com.dev, laddr6->sin6_addr.s6_addr,
				      raddr6->sin6_addr.s6_addr,
				      laddr6->sin6_port, raddr6->sin6_port, 0,
				      raddr6->sin6_scope_id);
		iptype = 6;
		ra = (__u8 *)&raddr6->sin6_addr;
	}
	if (!ep->dst) {
2100 2101 2102 2103
		pr_err("%s - cannot find route.\n", __func__);
		err = -EHOSTUNREACH;
		goto fail3;
	}
2104
	err = import_ep(ep, iptype, ra, ep->dst, ep->com.dev, false,
H
Hariprasad S 已提交
2105 2106
			ep->com.dev->rdev.lldi.adapter_type,
			ep->com.cm_id->tos);
2107
	if (err) {
2108 2109 2110 2111 2112 2113 2114 2115 2116
		pr_err("%s - cannot alloc l2e.\n", __func__);
		goto fail4;
	}

	PDBG("%s txq_idx %u tx_chan %u smac_idx %u rss_qid %u l2t_idx %u\n",
	     __func__, ep->txq_idx, ep->tx_chan, ep->smac_idx, ep->rss_qid,
	     ep->l2t->idx);

	state_set(&ep->com, CONNECTING);
H
Hariprasad S 已提交
2117
	ep->tos = ep->com.cm_id->tos;
2118 2119 2120 2121 2122 2123 2124 2125 2126 2127 2128 2129 2130 2131 2132 2133 2134 2135 2136 2137 2138 2139 2140 2141 2142

	/* send connect request to rnic */
	err = send_connect(ep);
	if (!err)
		goto out;

	cxgb4_l2t_release(ep->l2t);
fail4:
	dst_release(ep->dst);
fail3:
	remove_handle(ep->com.dev, &ep->com.dev->atid_idr, ep->atid);
	cxgb4_free_atid(ep->com.dev->rdev.lldi.tids, ep->atid);
fail2:
	/*
	 * remember to send notification to upper layer.
	 * We are in here so the upper layer is not aware that this is
	 * re-connect attempt and so, upper layer is still waiting for
	 * response of 1st connect request.
	 */
	connect_reply_upcall(ep, -ECONNRESET);
	c4iw_put_ep(&ep->com);
out:
	return err;
}

2143 2144 2145 2146
static int act_open_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
{
	struct c4iw_ep *ep;
	struct cpl_act_open_rpl *rpl = cplhdr(skb);
2147 2148
	unsigned int atid = TID_TID_G(AOPEN_ATID_G(
				      ntohl(rpl->atid_status)));
2149
	struct tid_info *t = dev->rdev.lldi.tids;
2150
	int status = AOPEN_STATUS_G(ntohl(rpl->atid_status));
2151 2152 2153 2154
	struct sockaddr_in *la;
	struct sockaddr_in *ra;
	struct sockaddr_in6 *la6;
	struct sockaddr_in6 *ra6;
2155
	int ret = 0;
2156 2157

	ep = lookup_atid(t, atid);
2158 2159 2160 2161
	la = (struct sockaddr_in *)&ep->com.local_addr;
	ra = (struct sockaddr_in *)&ep->com.remote_addr;
	la6 = (struct sockaddr_in6 *)&ep->com.local_addr;
	ra6 = (struct sockaddr_in6 *)&ep->com.remote_addr;
2162 2163 2164 2165

	PDBG("%s ep %p atid %u status %u errno %d\n", __func__, ep, atid,
	     status, status2errno(status));

2166
	if (is_neg_adv(status)) {
2167 2168 2169 2170 2171 2172
		PDBG("%s Connection problems for atid %u status %u (%s)\n",
		     __func__, atid, status, neg_adv_str(status));
		ep->stats.connect_neg_adv++;
		mutex_lock(&dev->rdev.stats.lock);
		dev->rdev.stats.neg_adv++;
		mutex_unlock(&dev->rdev.stats.lock);
2173 2174 2175
		return 0;
	}

2176 2177
	set_bit(ACT_OPEN_RPL, &ep->com.history);

2178 2179 2180 2181 2182 2183 2184
	/*
	 * Log interesting failures.
	 */
	switch (status) {
	case CPL_ERR_CONN_RESET:
	case CPL_ERR_CONN_TIMEDOUT:
		break;
2185
	case CPL_ERR_TCAM_FULL:
2186
		mutex_lock(&dev->rdev.stats.lock);
2187
		dev->rdev.stats.tcam_full++;
2188 2189 2190
		mutex_unlock(&dev->rdev.stats.lock);
		if (ep->com.local_addr.ss_family == AF_INET &&
		    dev->rdev.lldi.enable_fw_ofld_conn) {
2191 2192 2193 2194
			ret = send_fw_act_open_req(ep, TID_TID_G(AOPEN_ATID_G(
						   ntohl(rpl->atid_status))));
			if (ret)
				goto fail;
2195 2196 2197 2198 2199 2200
			return 0;
		}
		break;
	case CPL_ERR_CONN_EXIST:
		if (ep->retry_count++ < ACT_OPEN_RETRY_COUNT) {
			set_bit(ACT_RETRY_INUSE, &ep->com.history);
H
Hariprasad S 已提交
2201 2202 2203
			if (ep->com.remote_addr.ss_family == AF_INET6) {
				struct sockaddr_in6 *sin6 =
						(struct sockaddr_in6 *)
2204
						&ep->com.local_addr;
H
Hariprasad S 已提交
2205 2206 2207 2208 2209
				cxgb4_clip_release(
						ep->com.dev->rdev.lldi.ports[0],
						(const u32 *)
						&sin6->sin6_addr.s6_addr, 1);
			}
2210 2211 2212 2213 2214 2215 2216 2217
			remove_handle(ep->com.dev, &ep->com.dev->atid_idr,
					atid);
			cxgb4_free_atid(t, atid);
			dst_release(ep->dst);
			cxgb4_l2t_release(ep->l2t);
			c4iw_reconnect(ep);
			return 0;
		}
2218
		break;
2219
	default:
2220 2221 2222 2223 2224 2225 2226 2227 2228 2229 2230
		if (ep->com.local_addr.ss_family == AF_INET) {
			pr_info("Active open failure - atid %u status %u errno %d %pI4:%u->%pI4:%u\n",
				atid, status, status2errno(status),
				&la->sin_addr.s_addr, ntohs(la->sin_port),
				&ra->sin_addr.s_addr, ntohs(ra->sin_port));
		} else {
			pr_info("Active open failure - atid %u status %u errno %d %pI6:%u->%pI6:%u\n",
				atid, status, status2errno(status),
				la6->sin6_addr.s6_addr, ntohs(la6->sin6_port),
				ra6->sin6_addr.s6_addr, ntohs(ra6->sin6_port));
		}
2231 2232 2233
		break;
	}

2234
fail:
2235 2236 2237
	connect_reply_upcall(ep, status2errno(status));
	state_set(&ep->com, DEAD);

H
Hariprasad S 已提交
2238 2239
	if (ep->com.remote_addr.ss_family == AF_INET6) {
		struct sockaddr_in6 *sin6 =
2240
			(struct sockaddr_in6 *)&ep->com.local_addr;
H
Hariprasad S 已提交
2241 2242 2243
		cxgb4_clip_release(ep->com.dev->rdev.lldi.ports[0],
				   (const u32 *)&sin6->sin6_addr.s6_addr, 1);
	}
2244 2245 2246
	if (status && act_open_has_tid(status))
		cxgb4_remove_tid(ep->com.dev->rdev.lldi.tids, 0, GET_TID(rpl));

2247
	remove_handle(ep->com.dev, &ep->com.dev->atid_idr, atid);
2248 2249 2250 2251 2252 2253 2254 2255 2256 2257 2258 2259 2260 2261 2262 2263
	cxgb4_free_atid(t, atid);
	dst_release(ep->dst);
	cxgb4_l2t_release(ep->l2t);
	c4iw_put_ep(&ep->com);

	return 0;
}

static int pass_open_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
{
	struct cpl_pass_open_rpl *rpl = cplhdr(skb);
	struct tid_info *t = dev->rdev.lldi.tids;
	unsigned int stid = GET_TID(rpl);
	struct c4iw_listen_ep *ep = lookup_stid(t, stid);

	if (!ep) {
2264 2265
		PDBG("%s stid %d lookup failure!\n", __func__, stid);
		goto out;
2266 2267 2268
	}
	PDBG("%s ep %p status %d error %d\n", __func__, ep,
	     rpl->status, status2errno(rpl->status));
2269
	c4iw_wake_up(&ep->com.wr_wait, status2errno(rpl->status));
2270

2271
out:
2272 2273 2274 2275 2276 2277 2278 2279 2280 2281 2282
	return 0;
}

static int close_listsrv_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
{
	struct cpl_close_listsvr_rpl *rpl = cplhdr(skb);
	struct tid_info *t = dev->rdev.lldi.tids;
	unsigned int stid = GET_TID(rpl);
	struct c4iw_listen_ep *ep = lookup_stid(t, stid);

	PDBG("%s ep %p\n", __func__, ep);
2283
	c4iw_wake_up(&ep->com.wr_wait, status2errno(rpl->status));
2284 2285 2286
	return 0;
}

2287 2288
static int accept_cr(struct c4iw_ep *ep, struct sk_buff *skb,
		     struct cpl_pass_accept_req *req)
2289 2290 2291 2292 2293 2294
{
	struct cpl_pass_accept_rpl *rpl;
	unsigned int mtu_idx;
	u64 opt0;
	u32 opt2;
	int wscale;
2295
	struct cpl_t5_pass_accept_rpl *rpl5 = NULL;
2296
	int win;
2297
	enum chip_type adapter_type = ep->com.dev->rdev.lldi.adapter_type;
2298 2299 2300

	PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
	BUG_ON(skb_cloned(skb));
2301

2302
	skb_get(skb);
2303
	rpl = cplhdr(skb);
2304
	if (!is_t4(adapter_type)) {
2305 2306 2307 2308 2309 2310 2311 2312 2313 2314 2315
		skb_trim(skb, roundup(sizeof(*rpl5), 16));
		rpl5 = (void *)rpl;
		INIT_TP_WR(rpl5, ep->hwtid);
	} else {
		skb_trim(skb, sizeof(*rpl));
		INIT_TP_WR(rpl, ep->hwtid);
	}
	OPCODE_TID(rpl) = cpu_to_be32(MK_OPCODE_TID(CPL_PASS_ACCEPT_RPL,
						    ep->hwtid));

	best_mtu(ep->com.dev->rdev.lldi.mtus, ep->mtu, &mtu_idx,
2316 2317
		 enable_tcp_timestamps && req->tcpopt.tstamp,
		 (AF_INET == ep->com.remote_addr.ss_family) ? 0 : 1);
2318
	wscale = compute_wscale(rcv_win);
2319 2320 2321 2322 2323 2324

	/*
	 * Specify the largest window that will fit in opt0. The
	 * remainder will be specified in the rx_data_ack.
	 */
	win = ep->rcv_win >> 10;
2325 2326
	if (win > RCV_BUFSIZ_M)
		win = RCV_BUFSIZ_M;
2327
	opt0 = (nocong ? NO_CONG_F : 0) |
2328
	       KEEP_ALIVE_F |
2329
	       DELACK_F |
2330 2331 2332 2333 2334
	       WND_SCALE_V(wscale) |
	       MSS_IDX_V(mtu_idx) |
	       L2T_IDX_V(ep->l2t->idx) |
	       TX_CHAN_V(ep->tx_chan) |
	       SMAC_SEL_V(ep->smac_idx) |
2335
	       DSCP_V(ep->tos >> 2) |
2336 2337 2338 2339
	       ULP_MODE_V(ULP_MODE_TCPDDP) |
	       RCV_BUFSIZ_V(win);
	opt2 = RX_CHANNEL_V(0) |
	       RSS_QUEUE_VALID_F | RSS_QUEUE_V(ep->rss_qid);
2340 2341

	if (enable_tcp_timestamps && req->tcpopt.tstamp)
2342
		opt2 |= TSTAMPS_EN_F;
2343
	if (enable_tcp_sack && req->tcpopt.sack)
2344
		opt2 |= SACK_EN_F;
2345
	if (wscale && enable_tcp_window_scaling)
2346
		opt2 |= WND_SCALE_EN_F;
2347 2348 2349 2350
	if (enable_ecn) {
		const struct tcphdr *tcph;
		u32 hlen = ntohl(req->hdr_len);

2351 2352 2353 2354 2355 2356
		if (CHELSIO_CHIP_VERSION(adapter_type) <= CHELSIO_T5)
			tcph = (const void *)(req + 1) + ETH_HDR_LEN_G(hlen) +
				IP_HDR_LEN_G(hlen);
		else
			tcph = (const void *)(req + 1) +
				T6_ETH_HDR_LEN_G(hlen) + T6_IP_HDR_LEN_G(hlen);
2357
		if (tcph->ece && tcph->cwr)
2358
			opt2 |= CCTRL_ECN_V(1);
2359
	}
2360
	if (CHELSIO_CHIP_VERSION(adapter_type) > CHELSIO_T4) {
2361
		u32 isn = (prandom_u32() & ~7UL) - 1;
2362
		opt2 |= T5_OPT_2_VALID_F;
2363
		opt2 |= CONG_CNTRL_V(CONG_ALG_TAHOE);
2364
		opt2 |= T5_ISS_F;
2365 2366 2367 2368 2369 2370
		rpl5 = (void *)rpl;
		memset(&rpl5->iss, 0, roundup(sizeof(*rpl5)-sizeof(*rpl), 16));
		if (peer2peer)
			isn += 4;
		rpl5->iss = cpu_to_be32(isn);
		PDBG("%s iss %u\n", __func__, be32_to_cpu(rpl5->iss));
2371
	}
2372 2373 2374

	rpl->opt0 = cpu_to_be64(opt0);
	rpl->opt2 = cpu_to_be32(opt2);
S
Steve Wise 已提交
2375
	set_wr_txq(skb, CPL_PRIORITY_SETUP, ep->ctrlq_idx);
2376
	t4_set_arp_err_handler(skb, ep, pass_accept_rpl_arp_failure);
2377

2378
	return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
2379 2380
}

2381
static void reject_cr(struct c4iw_dev *dev, u32 hwtid, struct sk_buff *skb)
2382
{
2383
	PDBG("%s c4iw_dev %p tid %u\n", __func__, dev, hwtid);
2384 2385 2386 2387 2388 2389
	BUG_ON(skb_cloned(skb));
	skb_trim(skb, sizeof(struct cpl_tid_release));
	release_tid(&dev->rdev, hwtid, skb);
	return;
}

2390 2391
static void get_4tuple(struct cpl_pass_accept_req *req, enum chip_type type,
		       int *iptype, __u8 *local_ip, __u8 *peer_ip,
2392 2393
		       __be16 *local_port, __be16 *peer_port)
{
2394 2395 2396 2397 2398 2399
	int eth_len = (CHELSIO_CHIP_VERSION(type) <= CHELSIO_T5) ?
		      ETH_HDR_LEN_G(be32_to_cpu(req->hdr_len)) :
		      T6_ETH_HDR_LEN_G(be32_to_cpu(req->hdr_len));
	int ip_len = (CHELSIO_CHIP_VERSION(type) <= CHELSIO_T5) ?
		     IP_HDR_LEN_G(be32_to_cpu(req->hdr_len)) :
		     T6_IP_HDR_LEN_G(be32_to_cpu(req->hdr_len));
2400
	struct iphdr *ip = (struct iphdr *)((u8 *)(req + 1) + eth_len);
2401
	struct ipv6hdr *ip6 = (struct ipv6hdr *)((u8 *)(req + 1) + eth_len);
2402 2403 2404
	struct tcphdr *tcp = (struct tcphdr *)
			     ((u8 *)(req + 1) + eth_len + ip_len);

2405 2406 2407 2408 2409 2410 2411 2412 2413 2414 2415 2416 2417 2418 2419
	if (ip->version == 4) {
		PDBG("%s saddr 0x%x daddr 0x%x sport %u dport %u\n", __func__,
		     ntohl(ip->saddr), ntohl(ip->daddr), ntohs(tcp->source),
		     ntohs(tcp->dest));
		*iptype = 4;
		memcpy(peer_ip, &ip->saddr, 4);
		memcpy(local_ip, &ip->daddr, 4);
	} else {
		PDBG("%s saddr %pI6 daddr %pI6 sport %u dport %u\n", __func__,
		     ip6->saddr.s6_addr, ip6->daddr.s6_addr, ntohs(tcp->source),
		     ntohs(tcp->dest));
		*iptype = 6;
		memcpy(peer_ip, ip6->saddr.s6_addr, 16);
		memcpy(local_ip, ip6->daddr.s6_addr, 16);
	}
2420 2421 2422 2423 2424 2425 2426 2427
	*peer_port = tcp->source;
	*local_port = tcp->dest;

	return;
}

static int pass_accept_req(struct c4iw_dev *dev, struct sk_buff *skb)
{
2428
	struct c4iw_ep *child_ep = NULL, *parent_ep;
2429
	struct cpl_pass_accept_req *req = cplhdr(skb);
2430
	unsigned int stid = PASS_OPEN_TID_G(ntohl(req->tos_stid));
2431 2432 2433
	struct tid_info *t = dev->rdev.lldi.tids;
	unsigned int hwtid = GET_TID(req);
	struct dst_entry *dst;
2434
	__u8 local_ip[16], peer_ip[16];
2435
	__be16 local_port, peer_port;
H
Hariprasad S 已提交
2436
	struct sockaddr_in6 *sin6;
2437
	int err;
2438
	u16 peer_mss = ntohs(req->tcpopt.mss);
2439
	int iptype;
2440
	unsigned short hdrs;
H
Hariprasad S 已提交
2441
	u8 tos = PASS_OPEN_TOS_G(ntohl(req->tos_stid));
2442 2443

	parent_ep = lookup_stid(t, stid);
2444 2445 2446 2447 2448
	if (!parent_ep) {
		PDBG("%s connect request on invalid stid %d\n", __func__, stid);
		goto reject;
	}

2449
	if (state_read(&parent_ep->com) != LISTEN) {
2450
		PDBG("%s - listening ep not in LISTEN\n", __func__);
2451 2452 2453
		goto reject;
	}

2454 2455
	get_4tuple(req, parent_ep->com.dev->rdev.lldi.adapter_type, &iptype,
		   local_ip, peer_ip, &local_port, &peer_port);
2456

2457
	/* Find output route */
2458 2459 2460 2461 2462 2463 2464
	if (iptype == 4)  {
		PDBG("%s parent ep %p hwtid %u laddr %pI4 raddr %pI4 lport %d rport %d peer_mss %d\n"
		     , __func__, parent_ep, hwtid,
		     local_ip, peer_ip, ntohs(local_port),
		     ntohs(peer_port), peer_mss);
		dst = find_route(dev, *(__be32 *)local_ip, *(__be32 *)peer_ip,
				 local_port, peer_port,
H
Hariprasad S 已提交
2465
				 tos);
2466 2467 2468 2469 2470 2471
	} else {
		PDBG("%s parent ep %p hwtid %u laddr %pI6 raddr %pI6 lport %d rport %d peer_mss %d\n"
		     , __func__, parent_ep, hwtid,
		     local_ip, peer_ip, ntohs(local_port),
		     ntohs(peer_port), peer_mss);
		dst = find_route6(dev, local_ip, peer_ip, local_port, peer_port,
2472
				  PASS_OPEN_TOS_G(ntohl(req->tos_stid)),
2473 2474 2475 2476
				  ((struct sockaddr_in6 *)
				  &parent_ep->com.local_addr)->sin6_scope_id);
	}
	if (!dst) {
2477 2478 2479 2480
		printk(KERN_ERR MOD "%s - failed to find dst entry!\n",
		       __func__);
		goto reject;
	}
2481 2482 2483 2484

	child_ep = alloc_ep(sizeof(*child_ep), GFP_KERNEL);
	if (!child_ep) {
		printk(KERN_ERR MOD "%s - failed to allocate ep entry!\n",
2485 2486 2487 2488 2489
		       __func__);
		dst_release(dst);
		goto reject;
	}

2490
	err = import_ep(child_ep, iptype, peer_ip, dst, dev, false,
H
Hariprasad S 已提交
2491
			parent_ep->com.dev->rdev.lldi.adapter_type, tos);
2492 2493
	if (err) {
		printk(KERN_ERR MOD "%s - failed to allocate l2t entry!\n",
2494 2495
		       __func__);
		dst_release(dst);
2496
		kfree(child_ep);
2497 2498
		goto reject;
	}
2499

2500 2501 2502 2503
	hdrs = sizeof(struct iphdr) + sizeof(struct tcphdr) +
	       ((enable_tcp_timestamps && req->tcpopt.tstamp) ? 12 : 0);
	if (peer_mss && child_ep->mtu > (peer_mss + hdrs))
		child_ep->mtu = peer_mss + hdrs;
2504

2505 2506 2507
	state_set(&child_ep->com, CONNECTING);
	child_ep->com.dev = dev;
	child_ep->com.cm_id = NULL;
2508

2509 2510
	if (iptype == 4) {
		struct sockaddr_in *sin = (struct sockaddr_in *)
2511
			&child_ep->com.local_addr;
2512

2513 2514 2515
		sin->sin_family = PF_INET;
		sin->sin_port = local_port;
		sin->sin_addr.s_addr = *(__be32 *)local_ip;
2516 2517 2518 2519 2520 2521 2522

		sin = (struct sockaddr_in *)&child_ep->com.local_addr;
		sin->sin_family = PF_INET;
		sin->sin_port = ((struct sockaddr_in *)
				 &parent_ep->com.local_addr)->sin_port;
		sin->sin_addr.s_addr = *(__be32 *)local_ip;

2523
		sin = (struct sockaddr_in *)&child_ep->com.remote_addr;
2524 2525 2526 2527
		sin->sin_family = PF_INET;
		sin->sin_port = peer_port;
		sin->sin_addr.s_addr = *(__be32 *)peer_ip;
	} else {
2528
		sin6 = (struct sockaddr_in6 *)&child_ep->com.local_addr;
2529 2530 2531
		sin6->sin6_family = PF_INET6;
		sin6->sin6_port = local_port;
		memcpy(sin6->sin6_addr.s6_addr, local_ip, 16);
2532 2533 2534 2535 2536 2537 2538

		sin6 = (struct sockaddr_in6 *)&child_ep->com.local_addr;
		sin6->sin6_family = PF_INET6;
		sin6->sin6_port = ((struct sockaddr_in6 *)
				   &parent_ep->com.local_addr)->sin6_port;
		memcpy(sin6->sin6_addr.s6_addr, local_ip, 16);

2539
		sin6 = (struct sockaddr_in6 *)&child_ep->com.remote_addr;
2540 2541 2542 2543
		sin6->sin6_family = PF_INET6;
		sin6->sin6_port = peer_port;
		memcpy(sin6->sin6_addr.s6_addr, peer_ip, 16);
	}
2544

2545 2546
	c4iw_get_ep(&parent_ep->com);
	child_ep->parent_ep = parent_ep;
H
Hariprasad S 已提交
2547
	child_ep->tos = tos;
2548 2549 2550 2551
	child_ep->dst = dst;
	child_ep->hwtid = hwtid;

	PDBG("%s tx_chan %u smac_idx %u rss_qid %u\n", __func__,
2552
	     child_ep->tx_chan, child_ep->smac_idx, child_ep->rss_qid);
2553 2554 2555

	init_timer(&child_ep->timer);
	cxgb4_insert_tid(t, child_ep, hwtid);
2556
	insert_handle(dev, &dev->hwtid_idr, child_ep, child_ep->hwtid);
2557 2558 2559 2560 2561 2562
	if (accept_cr(child_ep, skb, req)) {
		c4iw_put_ep(&parent_ep->com);
		release_ep_resources(child_ep);
	} else {
		set_bit(PASS_ACCEPT_REQ, &child_ep->com.history);
	}
H
Hariprasad S 已提交
2563
	if (iptype == 6) {
2564
		sin6 = (struct sockaddr_in6 *)&child_ep->com.local_addr;
H
Hariprasad S 已提交
2565 2566 2567
		cxgb4_clip_get(child_ep->com.dev->rdev.lldi.ports[0],
			       (const u32 *)&sin6->sin6_addr.s6_addr, 1);
	}
2568 2569
	goto out;
reject:
2570
	reject_cr(dev, hwtid, skb);
2571 2572 2573 2574 2575 2576 2577 2578 2579 2580
out:
	return 0;
}

static int pass_establish(struct c4iw_dev *dev, struct sk_buff *skb)
{
	struct c4iw_ep *ep;
	struct cpl_pass_establish *req = cplhdr(skb);
	struct tid_info *t = dev->rdev.lldi.tids;
	unsigned int tid = GET_TID(req);
2581
	int ret;
2582 2583 2584 2585 2586 2587

	ep = lookup_tid(t, tid);
	PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
	ep->snd_seq = be32_to_cpu(req->snd_isn);
	ep->rcv_seq = be32_to_cpu(req->rcv_isn);

2588 2589 2590
	PDBG("%s ep %p hwtid %u tcp_opt 0x%02x\n", __func__, ep, tid,
	     ntohs(req->tcp_opt));

2591 2592 2593
	set_emss(ep, ntohs(req->tcp_opt));

	dst_confirm(ep->dst);
2594 2595
	mutex_lock(&ep->com.mutex);
	ep->com.state = MPA_REQ_WAIT;
2596
	start_ep_timer(ep);
2597
	set_bit(PASS_ESTAB, &ep->com.history);
2598 2599 2600 2601
	ret = send_flowc(ep, skb);
	mutex_unlock(&ep->com.mutex);
	if (ret)
		c4iw_ep_disconnect(ep, 1, GFP_KERNEL);
2602 2603 2604 2605 2606 2607 2608 2609 2610 2611 2612 2613 2614

	return 0;
}

static int peer_close(struct c4iw_dev *dev, struct sk_buff *skb)
{
	struct cpl_peer_close *hdr = cplhdr(skb);
	struct c4iw_ep *ep;
	struct c4iw_qp_attributes attrs;
	int disconnect = 1;
	int release = 0;
	struct tid_info *t = dev->rdev.lldi.tids;
	unsigned int tid = GET_TID(hdr);
S
Steve Wise 已提交
2615
	int ret;
2616 2617 2618 2619 2620

	ep = lookup_tid(t, tid);
	PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
	dst_confirm(ep->dst);

2621
	set_bit(PEER_CLOSE, &ep->com.history);
2622
	mutex_lock(&ep->com.mutex);
2623 2624 2625 2626 2627 2628 2629 2630 2631 2632 2633 2634 2635 2636 2637 2638 2639 2640
	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 c4iw_accept_cr()).
		 */
		__state_set(&ep->com, CLOSING);
		PDBG("waking up ep %p tid %u\n", ep, ep->hwtid);
2641
		c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
2642 2643 2644 2645
		break;
	case MPA_REP_SENT:
		__state_set(&ep->com, CLOSING);
		PDBG("waking up ep %p tid %u\n", ep, ep->hwtid);
2646
		c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
2647 2648
		break;
	case FPDU_MODE:
2649
		start_ep_timer(ep);
2650
		__state_set(&ep->com, CLOSING);
2651
		attrs.next_state = C4IW_QP_STATE_CLOSING;
S
Steve Wise 已提交
2652
		ret = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
2653
				       C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
S
Steve Wise 已提交
2654 2655 2656 2657
		if (ret != -ECONNRESET) {
			peer_close_upcall(ep);
			disconnect = 1;
		}
2658 2659 2660 2661 2662 2663 2664 2665 2666
		break;
	case ABORTING:
		disconnect = 0;
		break;
	case CLOSING:
		__state_set(&ep->com, MORIBUND);
		disconnect = 0;
		break;
	case MORIBUND:
S
Steve Wise 已提交
2667
		(void)stop_ep_timer(ep);
2668 2669 2670 2671 2672
		if (ep->com.cm_id && ep->com.qp) {
			attrs.next_state = C4IW_QP_STATE_IDLE;
			c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
				       C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
		}
2673
		close_complete_upcall(ep, 0);
2674 2675 2676 2677 2678 2679 2680 2681 2682 2683
		__state_set(&ep->com, DEAD);
		release = 1;
		disconnect = 0;
		break;
	case DEAD:
		disconnect = 0;
		break;
	default:
		BUG_ON(1);
	}
2684
	mutex_unlock(&ep->com.mutex);
2685 2686 2687 2688 2689 2690 2691 2692 2693 2694 2695 2696 2697 2698 2699 2700 2701 2702 2703 2704
	if (disconnect)
		c4iw_ep_disconnect(ep, 0, GFP_KERNEL);
	if (release)
		release_ep_resources(ep);
	return 0;
}

static int peer_abort(struct c4iw_dev *dev, struct sk_buff *skb)
{
	struct cpl_abort_req_rss *req = cplhdr(skb);
	struct c4iw_ep *ep;
	struct cpl_abort_rpl *rpl;
	struct sk_buff *rpl_skb;
	struct c4iw_qp_attributes attrs;
	int ret;
	int release = 0;
	struct tid_info *t = dev->rdev.lldi.tids;
	unsigned int tid = GET_TID(req);

	ep = lookup_tid(t, tid);
2705
	if (is_neg_adv(req->status)) {
2706 2707 2708 2709 2710 2711 2712
		PDBG("%s Negative advice on abort- tid %u status %d (%s)\n",
		     __func__, ep->hwtid, req->status,
		     neg_adv_str(req->status));
		ep->stats.abort_neg_adv++;
		mutex_lock(&dev->rdev.stats.lock);
		dev->rdev.stats.neg_adv++;
		mutex_unlock(&dev->rdev.stats.lock);
2713 2714 2715 2716
		return 0;
	}
	PDBG("%s ep %p tid %u state %u\n", __func__, ep, ep->hwtid,
	     ep->com.state);
2717
	set_bit(PEER_ABORT, &ep->com.history);
2718 2719 2720

	/*
	 * Wake up any threads in rdma_init() or rdma_fini().
2721 2722
	 * However, this is not needed if com state is just
	 * MPA_REQ_SENT
2723
	 */
2724 2725
	if (ep->com.state != MPA_REQ_SENT)
		c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
2726 2727

	mutex_lock(&ep->com.mutex);
2728 2729
	switch (ep->com.state) {
	case CONNECTING:
2730
		c4iw_put_ep(&ep->parent_ep->com);
2731 2732
		break;
	case MPA_REQ_WAIT:
S
Steve Wise 已提交
2733
		(void)stop_ep_timer(ep);
2734 2735
		break;
	case MPA_REQ_SENT:
S
Steve Wise 已提交
2736
		(void)stop_ep_timer(ep);
2737
		if (mpa_rev == 1 || (mpa_rev == 2 && ep->tried_with_mpa_v1))
2738 2739 2740 2741 2742 2743 2744 2745 2746 2747 2748 2749 2750 2751
			connect_reply_upcall(ep, -ECONNRESET);
		else {
			/*
			 * we just don't send notification upwards because we
			 * want to retry with mpa_v1 without upper layers even
			 * knowing it.
			 *
			 * do some housekeeping so as to re-initiate the
			 * connection
			 */
			PDBG("%s: mpa_rev=%d. Retrying with mpav1\n", __func__,
			     mpa_rev);
			ep->retry_with_mpa_v1 = 1;
		}
2752 2753 2754 2755 2756 2757 2758
		break;
	case MPA_REP_SENT:
		break;
	case MPA_REQ_RCVD:
		break;
	case MORIBUND:
	case CLOSING:
2759
		stop_ep_timer(ep);
2760 2761 2762 2763 2764 2765 2766 2767 2768 2769 2770 2771 2772 2773 2774 2775 2776 2777
		/*FALLTHROUGH*/
	case FPDU_MODE:
		if (ep->com.cm_id && ep->com.qp) {
			attrs.next_state = C4IW_QP_STATE_ERROR;
			ret = c4iw_modify_qp(ep->com.qp->rhp,
				     ep->com.qp, C4IW_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__);
2778
		mutex_unlock(&ep->com.mutex);
2779 2780 2781 2782 2783 2784 2785 2786
		return 0;
	default:
		BUG_ON(1);
		break;
	}
	dst_confirm(ep->dst);
	if (ep->com.state != ABORTING) {
		__state_set(&ep->com, DEAD);
2787 2788 2789
		/* we don't release if we want to retry with mpa_v1 */
		if (!ep->retry_with_mpa_v1)
			release = 1;
2790
	}
2791
	mutex_unlock(&ep->com.mutex);
2792 2793 2794 2795 2796 2797 2798 2799 2800 2801 2802 2803 2804 2805 2806 2807 2808

	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;
	}
	set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
	rpl = (struct cpl_abort_rpl *) skb_put(rpl_skb, sizeof(*rpl));
	INIT_TP_WR(rpl, ep->hwtid);
	OPCODE_TID(rpl) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_RPL, ep->hwtid));
	rpl->cmd = CPL_ABORT_NO_RST;
	c4iw_ofld_send(&ep->com.dev->rdev, rpl_skb);
out:
	if (release)
		release_ep_resources(ep);
2809
	else if (ep->retry_with_mpa_v1) {
H
Hariprasad S 已提交
2810 2811 2812
		if (ep->com.remote_addr.ss_family == AF_INET6) {
			struct sockaddr_in6 *sin6 =
					(struct sockaddr_in6 *)
2813
					&ep->com.local_addr;
H
Hariprasad S 已提交
2814 2815 2816 2817 2818
			cxgb4_clip_release(
					ep->com.dev->rdev.lldi.ports[0],
					(const u32 *)&sin6->sin6_addr.s6_addr,
					1);
		}
2819
		remove_handle(ep->com.dev, &ep->com.dev->hwtid_idr, ep->hwtid);
2820 2821 2822 2823 2824 2825
		cxgb4_remove_tid(ep->com.dev->rdev.lldi.tids, 0, ep->hwtid);
		dst_release(ep->dst);
		cxgb4_l2t_release(ep->l2t);
		c4iw_reconnect(ep);
	}

2826 2827 2828 2829 2830 2831 2832 2833 2834 2835 2836 2837 2838 2839 2840 2841 2842 2843
	return 0;
}

static int close_con_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
{
	struct c4iw_ep *ep;
	struct c4iw_qp_attributes attrs;
	struct cpl_close_con_rpl *rpl = cplhdr(skb);
	int release = 0;
	struct tid_info *t = dev->rdev.lldi.tids;
	unsigned int tid = GET_TID(rpl);

	ep = lookup_tid(t, tid);

	PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
	BUG_ON(!ep);

	/* The cm_id may be null if we failed to connect */
2844
	mutex_lock(&ep->com.mutex);
2845
	set_bit(CLOSE_CON_RPL, &ep->com.history);
2846 2847 2848 2849 2850
	switch (ep->com.state) {
	case CLOSING:
		__state_set(&ep->com, MORIBUND);
		break;
	case MORIBUND:
S
Steve Wise 已提交
2851
		(void)stop_ep_timer(ep);
2852 2853 2854 2855 2856 2857 2858
		if ((ep->com.cm_id) && (ep->com.qp)) {
			attrs.next_state = C4IW_QP_STATE_IDLE;
			c4iw_modify_qp(ep->com.qp->rhp,
					     ep->com.qp,
					     C4IW_QP_ATTR_NEXT_STATE,
					     &attrs, 1);
		}
2859
		close_complete_upcall(ep, 0);
2860 2861 2862 2863 2864 2865 2866 2867 2868 2869
		__state_set(&ep->com, DEAD);
		release = 1;
		break;
	case ABORTING:
	case DEAD:
		break;
	default:
		BUG_ON(1);
		break;
	}
2870
	mutex_unlock(&ep->com.mutex);
2871 2872 2873 2874 2875 2876 2877
	if (release)
		release_ep_resources(ep);
	return 0;
}

static int terminate(struct c4iw_dev *dev, struct sk_buff *skb)
{
2878
	struct cpl_rdma_terminate *rpl = cplhdr(skb);
2879
	struct tid_info *t = dev->rdev.lldi.tids;
2880 2881 2882
	unsigned int tid = GET_TID(rpl);
	struct c4iw_ep *ep;
	struct c4iw_qp_attributes attrs;
2883 2884

	ep = lookup_tid(t, tid);
2885
	BUG_ON(!ep);
2886

2887
	if (ep && ep->com.qp) {
2888 2889 2890 2891 2892 2893
		printk(KERN_WARNING MOD "TERM received tid %u qpid %u\n", tid,
		       ep->com.qp->wq.sq.qid);
		attrs.next_state = C4IW_QP_STATE_TERMINATE;
		c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
			       C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
	} else
2894
		printk(KERN_WARNING MOD "TERM received tid %u no ep/qp\n", tid);
2895 2896 2897 2898 2899 2900 2901 2902 2903 2904 2905 2906 2907 2908 2909 2910 2911 2912 2913 2914 2915

	return 0;
}

/*
 * 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 fw4_ack(struct c4iw_dev *dev, struct sk_buff *skb)
{
	struct c4iw_ep *ep;
	struct cpl_fw4_ack *hdr = cplhdr(skb);
	u8 credits = hdr->credits;
	unsigned int tid = GET_TID(hdr);
	struct tid_info *t = dev->rdev.lldi.tids;


	ep = lookup_tid(t, tid);
	PDBG("%s ep %p tid %u credits %u\n", __func__, ep, ep->hwtid, credits);
	if (credits == 0) {
2916 2917
		PDBG("%s 0 credit ack ep %p tid %u state %u\n",
		     __func__, ep, ep->hwtid, state_read(&ep->com));
2918 2919 2920 2921 2922 2923 2924 2925 2926 2927
		return 0;
	}

	dst_confirm(ep->dst);
	if (ep->mpa_skb) {
		PDBG("%s last streaming msg ack ep %p tid %u state %u "
		     "initiator %u freeing skb\n", __func__, ep, ep->hwtid,
		     state_read(&ep->com), ep->mpa_attr.initiator ? 1 : 0);
		kfree_skb(ep->mpa_skb);
		ep->mpa_skb = NULL;
2928 2929 2930 2931
		mutex_lock(&ep->com.mutex);
		if (test_bit(STOP_MPA_TIMER, &ep->com.flags))
			stop_ep_timer(ep);
		mutex_unlock(&ep->com.mutex);
2932 2933 2934 2935 2936 2937
	}
	return 0;
}

int c4iw_reject_cr(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
{
2938 2939
	int err = 0;
	int disconnect = 0;
2940 2941 2942
	struct c4iw_ep *ep = to_ep(cm_id);
	PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);

2943 2944 2945
	mutex_lock(&ep->com.mutex);
	if (ep->com.state == DEAD) {
		mutex_unlock(&ep->com.mutex);
2946 2947 2948
		c4iw_put_ep(&ep->com);
		return -ECONNRESET;
	}
2949
	set_bit(ULP_REJECT, &ep->com.history);
2950
	BUG_ON(ep->com.state != MPA_REQ_RCVD);
2951
	if (mpa_rev == 0)
2952
		disconnect = 2;
2953 2954
	else {
		err = send_mpa_reject(ep, pdata, pdata_len);
2955
		disconnect = 1;
2956
	}
2957
	mutex_unlock(&ep->com.mutex);
2958 2959
	if (disconnect) {
		stop_ep_timer(ep);
2960
		err = c4iw_ep_disconnect(ep, disconnect == 2, GFP_KERNEL);
2961
	}
2962 2963 2964 2965 2966 2967 2968 2969 2970 2971 2972 2973
	c4iw_put_ep(&ep->com);
	return 0;
}

int c4iw_accept_cr(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
{
	int err;
	struct c4iw_qp_attributes attrs;
	enum c4iw_qp_attr_mask mask;
	struct c4iw_ep *ep = to_ep(cm_id);
	struct c4iw_dev *h = to_c4iw_dev(cm_id->device);
	struct c4iw_qp *qp = get_qhp(h, conn_param->qpn);
2974
	int abort = 0;
2975 2976

	PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
2977 2978 2979

	mutex_lock(&ep->com.mutex);
	if (ep->com.state == DEAD) {
2980
		err = -ECONNRESET;
2981
		goto err_out;
2982 2983
	}

2984
	BUG_ON(ep->com.state != MPA_REQ_RCVD);
2985 2986
	BUG_ON(!qp);

2987
	set_bit(ULP_ACCEPT, &ep->com.history);
2988 2989
	if ((conn_param->ord > cur_max_read_depth(ep->com.dev)) ||
	    (conn_param->ird > cur_max_read_depth(ep->com.dev))) {
2990
		err = -EINVAL;
2991
		goto err_abort;
2992 2993
	}

2994 2995
	if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) {
		if (conn_param->ord > ep->ird) {
2996 2997 2998 2999 3000 3001 3002 3003
			if (RELAXED_IRD_NEGOTIATION) {
				ep->ord = ep->ird;
			} else {
				ep->ird = conn_param->ird;
				ep->ord = conn_param->ord;
				send_mpa_reject(ep, conn_param->private_data,
						conn_param->private_data_len);
				err = -ENOMEM;
3004
				goto err_abort;
3005
			}
3006
		}
3007 3008 3009 3010 3011
		if (conn_param->ird < ep->ord) {
			if (RELAXED_IRD_NEGOTIATION &&
			    ep->ord <= h->rdev.lldi.max_ordird_qp) {
				conn_param->ird = ep->ord;
			} else {
3012
				err = -ENOMEM;
3013
				goto err_abort;
3014 3015 3016
			}
		}
	}
3017 3018 3019
	ep->ird = conn_param->ird;
	ep->ord = conn_param->ord;

3020
	if (ep->mpa_attr.version == 1) {
3021 3022
		if (peer2peer && ep->ird == 0)
			ep->ird = 1;
3023 3024 3025
	} else {
		if (peer2peer &&
		    (ep->mpa_attr.p2p_type != FW_RI_INIT_P2PTYPE_DISABLED) &&
3026
		    (p2p_type == FW_RI_INIT_P2PTYPE_READ_REQ) && ep->ird == 0)
3027 3028
			ep->ird = 1;
	}
3029 3030 3031

	PDBG("%s %d ird %d ord %d\n", __func__, __LINE__, ep->ird, ep->ord);

3032
	ep->com.cm_id = cm_id;
3033
	ref_cm_id(&ep->com);
3034
	ep->com.qp = qp;
3035
	ref_qp(ep);
3036

3037 3038 3039 3040 3041 3042 3043 3044 3045 3046 3047 3048 3049 3050 3051 3052 3053
	/* 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 = C4IW_QP_STATE_RTS;

	/* bind QP and TID with INIT_WR */
	mask = C4IW_QP_ATTR_NEXT_STATE |
			     C4IW_QP_ATTR_LLP_STREAM_HANDLE |
			     C4IW_QP_ATTR_MPA_ATTR |
			     C4IW_QP_ATTR_MAX_IRD |
			     C4IW_QP_ATTR_MAX_ORD;

	err = c4iw_modify_qp(ep->com.qp->rhp,
			     ep->com.qp, mask, &attrs, 1);
	if (err)
3054
		goto err_deref_cm_id;
3055 3056

	set_bit(STOP_MPA_TIMER, &ep->com.flags);
3057 3058 3059
	err = send_mpa_reply(ep, conn_param->private_data,
			     conn_param->private_data_len);
	if (err)
3060
		goto err_deref_cm_id;
3061

3062
	__state_set(&ep->com, FPDU_MODE);
3063
	established_upcall(ep);
3064
	mutex_unlock(&ep->com.mutex);
3065 3066
	c4iw_put_ep(&ep->com);
	return 0;
3067
err_deref_cm_id:
3068
	deref_cm_id(&ep->com);
3069 3070 3071
err_abort:
	abort = 1;
err_out:
3072
	mutex_unlock(&ep->com.mutex);
3073 3074
	if (abort)
		c4iw_ep_disconnect(ep, 1, GFP_KERNEL);
3075 3076 3077 3078
	c4iw_put_ep(&ep->com);
	return err;
}

3079 3080 3081 3082
static int pick_local_ipaddrs(struct c4iw_dev *dev, struct iw_cm_id *cm_id)
{
	struct in_device *ind;
	int found = 0;
3083 3084
	struct sockaddr_in *laddr = (struct sockaddr_in *)&cm_id->m_local_addr;
	struct sockaddr_in *raddr = (struct sockaddr_in *)&cm_id->m_remote_addr;
3085 3086 3087 3088 3089 3090 3091 3092 3093 3094 3095 3096 3097 3098 3099 3100 3101 3102 3103 3104 3105 3106 3107 3108 3109 3110 3111 3112 3113 3114 3115 3116 3117 3118 3119 3120 3121 3122 3123 3124 3125 3126 3127 3128

	ind = in_dev_get(dev->rdev.lldi.ports[0]);
	if (!ind)
		return -EADDRNOTAVAIL;
	for_primary_ifa(ind) {
		laddr->sin_addr.s_addr = ifa->ifa_address;
		raddr->sin_addr.s_addr = ifa->ifa_address;
		found = 1;
		break;
	}
	endfor_ifa(ind);
	in_dev_put(ind);
	return found ? 0 : -EADDRNOTAVAIL;
}

static int get_lladdr(struct net_device *dev, struct in6_addr *addr,
		      unsigned char banned_flags)
{
	struct inet6_dev *idev;
	int err = -EADDRNOTAVAIL;

	rcu_read_lock();
	idev = __in6_dev_get(dev);
	if (idev != NULL) {
		struct inet6_ifaddr *ifp;

		read_lock_bh(&idev->lock);
		list_for_each_entry(ifp, &idev->addr_list, if_list) {
			if (ifp->scope == IFA_LINK &&
			    !(ifp->flags & banned_flags)) {
				memcpy(addr, &ifp->addr, 16);
				err = 0;
				break;
			}
		}
		read_unlock_bh(&idev->lock);
	}
	rcu_read_unlock();
	return err;
}

static int pick_local_ip6addrs(struct c4iw_dev *dev, struct iw_cm_id *cm_id)
{
	struct in6_addr uninitialized_var(addr);
3129 3130
	struct sockaddr_in6 *la6 = (struct sockaddr_in6 *)&cm_id->m_local_addr;
	struct sockaddr_in6 *ra6 = (struct sockaddr_in6 *)&cm_id->m_remote_addr;
3131

3132
	if (!get_lladdr(dev->rdev.lldi.ports[0], &addr, IFA_F_TENTATIVE)) {
3133 3134 3135 3136 3137 3138 3139
		memcpy(la6->sin6_addr.s6_addr, &addr, 16);
		memcpy(ra6->sin6_addr.s6_addr, &addr, 16);
		return 0;
	}
	return -EADDRNOTAVAIL;
}

3140 3141 3142 3143
int c4iw_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
{
	struct c4iw_dev *dev = to_c4iw_dev(cm_id->device);
	struct c4iw_ep *ep;
3144
	int err = 0;
3145 3146 3147 3148
	struct sockaddr_in *laddr;
	struct sockaddr_in *raddr;
	struct sockaddr_in6 *laddr6;
	struct sockaddr_in6 *raddr6;
3149 3150
	__u8 *ra;
	int iptype;
3151

3152 3153
	if ((conn_param->ord > cur_max_read_depth(dev)) ||
	    (conn_param->ird > cur_max_read_depth(dev))) {
3154 3155 3156
		err = -EINVAL;
		goto out;
	}
3157 3158 3159 3160 3161 3162 3163 3164 3165 3166 3167 3168 3169 3170 3171 3172 3173 3174
	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.cm_id = cm_id;
3175 3176
	ref_cm_id(&ep->com);
	ep->com.dev = dev;
3177
	ep->com.qp = get_qhp(dev, conn_param->qpn);
3178 3179 3180
	if (!ep->com.qp) {
		PDBG("%s qpn 0x%x not found!\n", __func__, conn_param->qpn);
		err = -EINVAL;
3181
		goto fail1;
3182
	}
3183
	ref_qp(ep);
3184 3185 3186 3187 3188 3189 3190 3191 3192 3193
	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 = cxgb4_alloc_atid(dev->rdev.lldi.tids, ep);
	if (ep->atid == -1) {
		printk(KERN_ERR MOD "%s - cannot alloc atid.\n", __func__);
		err = -ENOMEM;
3194
		goto fail1;
3195
	}
3196
	insert_handle(dev, &dev->atid_idr, ep, ep->atid);
3197

3198
	memcpy(&ep->com.local_addr, &cm_id->m_local_addr,
3199
	       sizeof(ep->com.local_addr));
3200
	memcpy(&ep->com.remote_addr, &cm_id->m_remote_addr,
3201 3202
	       sizeof(ep->com.remote_addr));

3203 3204 3205 3206
	laddr = (struct sockaddr_in *)&ep->com.local_addr;
	raddr = (struct sockaddr_in *)&ep->com.remote_addr;
	laddr6 = (struct sockaddr_in6 *)&ep->com.local_addr;
	raddr6 = (struct sockaddr_in6 *) &ep->com.remote_addr;
3207

3208
	if (cm_id->m_remote_addr.ss_family == AF_INET) {
3209 3210
		iptype = 4;
		ra = (__u8 *)&raddr->sin_addr;
3211

3212 3213 3214 3215 3216 3217
		/*
		 * Handle loopback requests to INADDR_ANY.
		 */
		if ((__force int)raddr->sin_addr.s_addr == INADDR_ANY) {
			err = pick_local_ipaddrs(dev, cm_id);
			if (err)
3218
				goto fail1;
3219 3220 3221 3222 3223 3224 3225 3226
		}

		/* find a route */
		PDBG("%s saddr %pI4 sport 0x%x raddr %pI4 rport 0x%x\n",
		     __func__, &laddr->sin_addr, ntohs(laddr->sin_port),
		     ra, ntohs(raddr->sin_port));
		ep->dst = find_route(dev, laddr->sin_addr.s_addr,
				     raddr->sin_addr.s_addr, laddr->sin_port,
H
Hariprasad S 已提交
3227
				     raddr->sin_port, cm_id->tos);
3228 3229 3230 3231 3232 3233 3234 3235 3236 3237
	} else {
		iptype = 6;
		ra = (__u8 *)&raddr6->sin6_addr;

		/*
		 * Handle loopback requests to INADDR_ANY.
		 */
		if (ipv6_addr_type(&raddr6->sin6_addr) == IPV6_ADDR_ANY) {
			err = pick_local_ip6addrs(dev, cm_id);
			if (err)
3238
				goto fail1;
3239 3240 3241 3242 3243 3244 3245 3246 3247 3248 3249 3250 3251
		}

		/* find a route */
		PDBG("%s saddr %pI6 sport 0x%x raddr %pI6 rport 0x%x\n",
		     __func__, laddr6->sin6_addr.s6_addr,
		     ntohs(laddr6->sin6_port),
		     raddr6->sin6_addr.s6_addr, ntohs(raddr6->sin6_port));
		ep->dst = find_route6(dev, laddr6->sin6_addr.s6_addr,
				      raddr6->sin6_addr.s6_addr,
				      laddr6->sin6_port, raddr6->sin6_port, 0,
				      raddr6->sin6_scope_id);
	}
	if (!ep->dst) {
3252 3253
		printk(KERN_ERR MOD "%s - cannot find route.\n", __func__);
		err = -EHOSTUNREACH;
3254
		goto fail2;
3255 3256
	}

3257
	err = import_ep(ep, iptype, ra, ep->dst, ep->com.dev, true,
H
Hariprasad S 已提交
3258
			ep->com.dev->rdev.lldi.adapter_type, cm_id->tos);
3259
	if (err) {
3260
		printk(KERN_ERR MOD "%s - cannot alloc l2e.\n", __func__);
3261
		goto fail3;
3262 3263 3264 3265 3266 3267 3268
	}

	PDBG("%s txq_idx %u tx_chan %u smac_idx %u rss_qid %u l2t_idx %u\n",
		__func__, ep->txq_idx, ep->tx_chan, ep->smac_idx, ep->rss_qid,
		ep->l2t->idx);

	state_set(&ep->com, CONNECTING);
H
Hariprasad S 已提交
3269
	ep->tos = cm_id->tos;
3270 3271 3272 3273 3274 3275 3276 3277

	/* send connect request to rnic */
	err = send_connect(ep);
	if (!err)
		goto out;

	cxgb4_l2t_release(ep->l2t);
fail3:
3278 3279
	dst_release(ep->dst);
fail2:
3280
	remove_handle(ep->com.dev, &ep->com.dev->atid_idr, ep->atid);
3281
	cxgb4_free_atid(ep->com.dev->rdev.lldi.tids, ep->atid);
3282
fail1:
3283
	deref_cm_id(&ep->com);
3284 3285 3286 3287 3288
	c4iw_put_ep(&ep->com);
out:
	return err;
}

3289 3290 3291
static int create_server6(struct c4iw_dev *dev, struct c4iw_listen_ep *ep)
{
	int err;
3292
	struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)
3293
				    &ep->com.local_addr;
3294

3295 3296 3297 3298 3299 3300
	if (ipv6_addr_type(&sin6->sin6_addr) != IPV6_ADDR_ANY) {
		err = cxgb4_clip_get(ep->com.dev->rdev.lldi.ports[0],
				     (const u32 *)&sin6->sin6_addr.s6_addr, 1);
		if (err)
			return err;
	}
3301 3302 3303 3304 3305 3306 3307 3308 3309
	c4iw_init_wr_wait(&ep->com.wr_wait);
	err = cxgb4_create_server6(ep->com.dev->rdev.lldi.ports[0],
				   ep->stid, &sin6->sin6_addr,
				   sin6->sin6_port,
				   ep->com.dev->rdev.lldi.rxq_ids[0]);
	if (!err)
		err = c4iw_wait_for_reply(&ep->com.dev->rdev,
					  &ep->com.wr_wait,
					  0, 0, __func__);
3310 3311
	else if (err > 0)
		err = net_xmit_errno(err);
3312 3313 3314
	if (err) {
		cxgb4_clip_release(ep->com.dev->rdev.lldi.ports[0],
				   (const u32 *)&sin6->sin6_addr.s6_addr, 1);
3315 3316 3317
		pr_err("cxgb4_create_server6/filter failed err %d stid %d laddr %pI6 lport %d\n",
		       err, ep->stid,
		       sin6->sin6_addr.s6_addr, ntohs(sin6->sin6_port));
3318
	}
3319 3320 3321 3322 3323 3324
	return err;
}

static int create_server4(struct c4iw_dev *dev, struct c4iw_listen_ep *ep)
{
	int err;
3325
	struct sockaddr_in *sin = (struct sockaddr_in *)
3326
				  &ep->com.local_addr;
3327 3328 3329 3330 3331 3332 3333 3334

	if (dev->rdev.lldi.enable_fw_ofld_conn) {
		do {
			err = cxgb4_create_server_filter(
				ep->com.dev->rdev.lldi.ports[0], ep->stid,
				sin->sin_addr.s_addr, sin->sin_port, 0,
				ep->com.dev->rdev.lldi.rxq_ids[0], 0, 0);
			if (err == -EBUSY) {
3335 3336 3337 3338
				if (c4iw_fatal_error(&ep->com.dev->rdev)) {
					err = -EIO;
					break;
				}
3339 3340 3341 3342 3343 3344 3345 3346 3347 3348 3349 3350 3351
				set_current_state(TASK_UNINTERRUPTIBLE);
				schedule_timeout(usecs_to_jiffies(100));
			}
		} while (err == -EBUSY);
	} else {
		c4iw_init_wr_wait(&ep->com.wr_wait);
		err = cxgb4_create_server(ep->com.dev->rdev.lldi.ports[0],
				ep->stid, sin->sin_addr.s_addr, sin->sin_port,
				0, ep->com.dev->rdev.lldi.rxq_ids[0]);
		if (!err)
			err = c4iw_wait_for_reply(&ep->com.dev->rdev,
						  &ep->com.wr_wait,
						  0, 0, __func__);
3352 3353
		else if (err > 0)
			err = net_xmit_errno(err);
3354 3355 3356 3357 3358 3359 3360 3361
	}
	if (err)
		pr_err("cxgb4_create_server/filter failed err %d stid %d laddr %pI4 lport %d\n"
		       , err, ep->stid,
		       &sin->sin_addr, ntohs(sin->sin_port));
	return err;
}

3362 3363 3364 3365 3366 3367 3368 3369 3370 3371 3372 3373 3374 3375 3376 3377
int c4iw_create_listen(struct iw_cm_id *cm_id, int backlog)
{
	int err = 0;
	struct c4iw_dev *dev = to_c4iw_dev(cm_id->device);
	struct c4iw_listen_ep *ep;

	might_sleep();

	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.cm_id = cm_id;
3378
	ref_cm_id(&ep->com);
3379 3380
	ep->com.dev = dev;
	ep->backlog = backlog;
3381
	memcpy(&ep->com.local_addr, &cm_id->m_local_addr,
3382
	       sizeof(ep->com.local_addr));
3383 3384 3385 3386

	/*
	 * Allocate a server TID.
	 */
3387 3388
	if (dev->rdev.lldi.enable_fw_ofld_conn &&
	    ep->com.local_addr.ss_family == AF_INET)
3389
		ep->stid = cxgb4_alloc_sftid(dev->rdev.lldi.tids,
3390
					     cm_id->m_local_addr.ss_family, ep);
3391
	else
3392
		ep->stid = cxgb4_alloc_stid(dev->rdev.lldi.tids,
3393
					    cm_id->m_local_addr.ss_family, ep);
3394

3395
	if (ep->stid == -1) {
3396
		printk(KERN_ERR MOD "%s - cannot alloc stid.\n", __func__);
3397 3398 3399
		err = -ENOMEM;
		goto fail2;
	}
3400
	insert_handle(dev, &dev->stid_idr, ep, ep->stid);
3401

3402 3403
	memcpy(&ep->com.local_addr, &cm_id->m_local_addr,
	       sizeof(ep->com.local_addr));
3404

3405
	state_set(&ep->com, LISTEN);
3406 3407 3408 3409
	if (ep->com.local_addr.ss_family == AF_INET)
		err = create_server4(dev, ep);
	else
		err = create_server6(dev, ep);
3410 3411 3412 3413
	if (!err) {
		cm_id->provider_data = ep;
		goto out;
	}
3414

3415 3416
	cxgb4_free_stid(ep->com.dev->rdev.lldi.tids, ep->stid,
			ep->com.local_addr.ss_family);
3417
fail2:
3418
	deref_cm_id(&ep->com);
3419 3420 3421 3422 3423 3424 3425 3426 3427 3428 3429 3430 3431 3432 3433
	c4iw_put_ep(&ep->com);
fail1:
out:
	return err;
}

int c4iw_destroy_listen(struct iw_cm_id *cm_id)
{
	int err;
	struct c4iw_listen_ep *ep = to_listen_ep(cm_id);

	PDBG("%s ep %p\n", __func__, ep);

	might_sleep();
	state_set(&ep->com, DEAD);
3434 3435
	if (ep->com.dev->rdev.lldi.enable_fw_ofld_conn &&
	    ep->com.local_addr.ss_family == AF_INET) {
3436 3437 3438 3439
		err = cxgb4_remove_server_filter(
			ep->com.dev->rdev.lldi.ports[0], ep->stid,
			ep->com.dev->rdev.lldi.rxq_ids[0], 0);
	} else {
H
Hariprasad S 已提交
3440
		struct sockaddr_in6 *sin6;
3441
		c4iw_init_wr_wait(&ep->com.wr_wait);
3442 3443 3444
		err = cxgb4_remove_server(
				ep->com.dev->rdev.lldi.ports[0], ep->stid,
				ep->com.dev->rdev.lldi.rxq_ids[0], 0);
3445 3446 3447 3448
		if (err)
			goto done;
		err = c4iw_wait_for_reply(&ep->com.dev->rdev, &ep->com.wr_wait,
					  0, 0, __func__);
3449
		sin6 = (struct sockaddr_in6 *)&ep->com.local_addr;
H
Hariprasad S 已提交
3450 3451
		cxgb4_clip_release(ep->com.dev->rdev.lldi.ports[0],
				   (const u32 *)&sin6->sin6_addr.s6_addr, 1);
3452
	}
3453
	remove_handle(ep->com.dev, &ep->com.dev->stid_idr, ep->stid);
3454 3455
	cxgb4_free_stid(ep->com.dev->rdev.lldi.tids, ep->stid,
			ep->com.local_addr.ss_family);
3456
done:
3457
	deref_cm_id(&ep->com);
3458 3459 3460 3461 3462 3463 3464 3465 3466 3467 3468
	c4iw_put_ep(&ep->com);
	return err;
}

int c4iw_ep_disconnect(struct c4iw_ep *ep, int abrupt, gfp_t gfp)
{
	int ret = 0;
	int close = 0;
	int fatal = 0;
	struct c4iw_rdev *rdev;

3469
	mutex_lock(&ep->com.mutex);
3470 3471 3472 3473

	PDBG("%s ep %p state %s, abrupt %d\n", __func__, ep,
	     states[ep->com.state], abrupt);

3474 3475 3476 3477 3478 3479
	/*
	 * Ref the ep here in case we have fatal errors causing the
	 * ep to be released and freed.
	 */
	c4iw_get_ep(&ep->com);

3480 3481 3482
	rdev = &ep->com.dev->rdev;
	if (c4iw_fatal_error(rdev)) {
		fatal = 1;
3483
		close_complete_upcall(ep, -EIO);
3484 3485 3486 3487 3488 3489 3490 3491 3492 3493 3494 3495 3496
		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;
3497
			start_ep_timer(ep);
3498 3499 3500 3501 3502 3503 3504
		}
		set_bit(CLOSE_SENT, &ep->com.flags);
		break;
	case CLOSING:
		if (!test_and_set_bit(CLOSE_SENT, &ep->com.flags)) {
			close = 1;
			if (abrupt) {
S
Steve Wise 已提交
3505
				(void)stop_ep_timer(ep);
3506 3507 3508 3509 3510 3511 3512 3513 3514 3515 3516 3517 3518 3519 3520 3521 3522
				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;
	}

	if (close) {
S
Steve Wise 已提交
3523
		if (abrupt) {
3524
			set_bit(EP_DISC_ABORT, &ep->com.history);
3525
			close_complete_upcall(ep, -ECONNRESET);
S
Steve Wise 已提交
3526
			ret = send_abort(ep, NULL, gfp);
3527 3528
		} else {
			set_bit(EP_DISC_CLOSE, &ep->com.history);
3529
			ret = send_halfclose(ep, gfp);
3530
		}
3531
		if (ret) {
3532
			set_bit(EP_DISC_FAIL, &ep->com.history);
3533 3534 3535 3536
			if (!abrupt) {
				stop_ep_timer(ep);
				close_complete_upcall(ep, -EIO);
			}
3537 3538 3539 3540 3541 3542 3543 3544 3545 3546 3547 3548 3549
			if (ep->com.qp) {
				struct c4iw_qp_attributes attrs;

				attrs.next_state = C4IW_QP_STATE_ERROR;
				ret = c4iw_modify_qp(ep->com.qp->rhp,
						     ep->com.qp,
						     C4IW_QP_ATTR_NEXT_STATE,
						     &attrs, 1);
				if (ret)
					pr_err(MOD
					       "%s - qp <- error failed!\n",
					       __func__);
			}
3550
			fatal = 1;
3551
		}
3552
	}
S
Steve Wise 已提交
3553
	mutex_unlock(&ep->com.mutex);
3554
	c4iw_put_ep(&ep->com);
3555 3556 3557 3558 3559
	if (fatal)
		release_ep_resources(ep);
	return ret;
}

3560 3561 3562 3563
static void active_ofld_conn_reply(struct c4iw_dev *dev, struct sk_buff *skb,
			struct cpl_fw6_msg_ofld_connection_wr_rpl *req)
{
	struct c4iw_ep *ep;
3564
	int atid = be32_to_cpu(req->tid);
3565

3566 3567
	ep = (struct c4iw_ep *)lookup_atid(dev->rdev.lldi.tids,
					   (__force u32) req->tid);
3568 3569 3570 3571 3572
	if (!ep)
		return;

	switch (req->retval) {
	case FW_ENOMEM:
3573 3574 3575 3576 3577
		set_bit(ACT_RETRY_NOMEM, &ep->com.history);
		if (ep->retry_count++ < ACT_OPEN_RETRY_COUNT) {
			send_fw_act_open_req(ep, atid);
			return;
		}
3578
	case FW_EADDRINUSE:
3579 3580 3581 3582 3583
		set_bit(ACT_RETRY_INUSE, &ep->com.history);
		if (ep->retry_count++ < ACT_OPEN_RETRY_COUNT) {
			send_fw_act_open_req(ep, atid);
			return;
		}
3584 3585 3586 3587 3588 3589
		break;
	default:
		pr_info("%s unexpected ofld conn wr retval %d\n",
		       __func__, req->retval);
		break;
	}
3590 3591 3592 3593 3594
	pr_err("active ofld_connect_wr failure %d atid %d\n",
	       req->retval, atid);
	mutex_lock(&dev->rdev.stats.lock);
	dev->rdev.stats.act_ofld_conn_fails++;
	mutex_unlock(&dev->rdev.stats.lock);
3595
	connect_reply_upcall(ep, status2errno(req->retval));
3596
	state_set(&ep->com, DEAD);
H
Hariprasad S 已提交
3597 3598
	if (ep->com.remote_addr.ss_family == AF_INET6) {
		struct sockaddr_in6 *sin6 =
3599
			(struct sockaddr_in6 *)&ep->com.local_addr;
H
Hariprasad S 已提交
3600 3601 3602
		cxgb4_clip_release(ep->com.dev->rdev.lldi.ports[0],
				   (const u32 *)&sin6->sin6_addr.s6_addr, 1);
	}
3603 3604 3605 3606 3607
	remove_handle(dev, &dev->atid_idr, atid);
	cxgb4_free_atid(dev->rdev.lldi.tids, atid);
	dst_release(ep->dst);
	cxgb4_l2t_release(ep->l2t);
	c4iw_put_ep(&ep->com);
3608 3609 3610 3611 3612 3613 3614 3615 3616
}

static void passive_ofld_conn_reply(struct c4iw_dev *dev, struct sk_buff *skb,
			struct cpl_fw6_msg_ofld_connection_wr_rpl *req)
{
	struct sk_buff *rpl_skb;
	struct cpl_pass_accept_req *cpl;
	int ret;

3617
	rpl_skb = (struct sk_buff *)(unsigned long)req->cookie;
3618 3619 3620
	BUG_ON(!rpl_skb);
	if (req->retval) {
		PDBG("%s passive open failure %d\n", __func__, req->retval);
3621 3622 3623
		mutex_lock(&dev->rdev.stats.lock);
		dev->rdev.stats.pas_ofld_conn_fails++;
		mutex_unlock(&dev->rdev.stats.lock);
3624 3625 3626 3627
		kfree_skb(rpl_skb);
	} else {
		cpl = (struct cpl_pass_accept_req *)cplhdr(rpl_skb);
		OPCODE_TID(cpl) = htonl(MK_OPCODE_TID(CPL_PASS_ACCEPT_REQ,
3628 3629
					(__force u32) htonl(
					(__force u32) req->tid)));
3630 3631 3632 3633 3634 3635 3636 3637
		ret = pass_accept_req(dev, rpl_skb);
		if (!ret)
			kfree_skb(rpl_skb);
	}
	return;
}

static int deferred_fw6_msg(struct c4iw_dev *dev, struct sk_buff *skb)
3638 3639
{
	struct cpl_fw6_msg *rpl = cplhdr(skb);
3640 3641 3642 3643 3644 3645 3646 3647 3648 3649 3650 3651 3652 3653 3654 3655 3656 3657 3658 3659 3660 3661 3662 3663 3664 3665 3666
	struct cpl_fw6_msg_ofld_connection_wr_rpl *req;

	switch (rpl->type) {
	case FW6_TYPE_CQE:
		c4iw_ev_dispatch(dev, (struct t4_cqe *)&rpl->data[0]);
		break;
	case FW6_TYPE_OFLD_CONNECTION_WR_RPL:
		req = (struct cpl_fw6_msg_ofld_connection_wr_rpl *)rpl->data;
		switch (req->t_state) {
		case TCP_SYN_SENT:
			active_ofld_conn_reply(dev, skb, req);
			break;
		case TCP_SYN_RECV:
			passive_ofld_conn_reply(dev, skb, req);
			break;
		default:
			pr_err("%s unexpected ofld conn wr state %d\n",
			       __func__, req->t_state);
			break;
		}
		break;
	}
	return 0;
}

static void build_cpl_pass_accept_req(struct sk_buff *skb, int stid , u8 tos)
{
3667 3668 3669 3670
	__be32 l2info;
	__be16 hdr_len, vlantag, len;
	u16 eth_hdr_len;
	int tcp_hdr_len, ip_hdr_len;
3671 3672 3673 3674
	u8 intf;
	struct cpl_rx_pkt *cpl = cplhdr(skb);
	struct cpl_pass_accept_req *req;
	struct tcp_options_received tmp_opt;
3675
	struct c4iw_dev *dev;
3676
	enum chip_type type;
3677

3678
	dev = *((struct c4iw_dev **) (skb->cb + sizeof(void *)));
3679
	/* Store values from cpl_rx_pkt in temporary location. */
3680 3681 3682 3683
	vlantag = cpl->vlan;
	len = cpl->len;
	l2info  = cpl->l2info;
	hdr_len = cpl->hdr_len;
3684 3685 3686 3687 3688 3689 3690 3691 3692 3693
	intf = cpl->iff;

	__skb_pull(skb, sizeof(*req) + sizeof(struct rss_header));

	/*
	 * We need to parse the TCP options from SYN packet.
	 * to generate cpl_pass_accept_req.
	 */
	memset(&tmp_opt, 0, sizeof(tmp_opt));
	tcp_clear_options(&tmp_opt);
C
Christoph Paasch 已提交
3694
	tcp_parse_options(skb, &tmp_opt, 0, NULL);
3695 3696 3697

	req = (struct cpl_pass_accept_req *)__skb_push(skb, sizeof(*req));
	memset(req, 0, sizeof(*req));
3698 3699
	req->l2info = cpu_to_be16(SYN_INTF_V(intf) |
			 SYN_MAC_IDX_V(RX_MACIDX_G(
3700
			 be32_to_cpu(l2info))) |
3701
			 SYN_XACT_MATCH_F);
3702 3703 3704 3705 3706 3707 3708 3709 3710 3711 3712 3713 3714 3715 3716 3717 3718 3719 3720 3721
	type = dev->rdev.lldi.adapter_type;
	tcp_hdr_len = RX_TCPHDR_LEN_G(be16_to_cpu(hdr_len));
	ip_hdr_len = RX_IPHDR_LEN_G(be16_to_cpu(hdr_len));
	req->hdr_len =
		cpu_to_be32(SYN_RX_CHAN_V(RX_CHAN_G(be32_to_cpu(l2info))));
	if (CHELSIO_CHIP_VERSION(type) <= CHELSIO_T5) {
		eth_hdr_len = is_t4(type) ?
				RX_ETHHDR_LEN_G(be32_to_cpu(l2info)) :
				RX_T5_ETHHDR_LEN_G(be32_to_cpu(l2info));
		req->hdr_len |= cpu_to_be32(TCP_HDR_LEN_V(tcp_hdr_len) |
					    IP_HDR_LEN_V(ip_hdr_len) |
					    ETH_HDR_LEN_V(eth_hdr_len));
	} else { /* T6 and later */
		eth_hdr_len = RX_T6_ETHHDR_LEN_G(be32_to_cpu(l2info));
		req->hdr_len |= cpu_to_be32(T6_TCP_HDR_LEN_V(tcp_hdr_len) |
					    T6_IP_HDR_LEN_V(ip_hdr_len) |
					    T6_ETH_HDR_LEN_V(eth_hdr_len));
	}
	req->vlan = vlantag;
	req->len = len;
3722 3723
	req->tos_stid = cpu_to_be32(PASS_OPEN_TID_V(stid) |
				    PASS_OPEN_TOS_V(tos));
3724 3725 3726 3727 3728 3729 3730 3731 3732 3733 3734 3735 3736 3737 3738 3739 3740 3741 3742
	req->tcpopt.mss = htons(tmp_opt.mss_clamp);
	if (tmp_opt.wscale_ok)
		req->tcpopt.wsf = tmp_opt.snd_wscale;
	req->tcpopt.tstamp = tmp_opt.saw_tstamp;
	if (tmp_opt.sack_ok)
		req->tcpopt.sack = 1;
	OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_PASS_ACCEPT_REQ, 0));
	return;
}

static void send_fw_pass_open_req(struct c4iw_dev *dev, struct sk_buff *skb,
				  __be32 laddr, __be16 lport,
				  __be32 raddr, __be16 rport,
				  u32 rcv_isn, u32 filter, u16 window,
				  u32 rss_qid, u8 port_id)
{
	struct sk_buff *req_skb;
	struct fw_ofld_connection_wr *req;
	struct cpl_pass_accept_req *cpl = cplhdr(skb);
3743
	int ret;
3744 3745 3746 3747

	req_skb = alloc_skb(sizeof(struct fw_ofld_connection_wr), GFP_KERNEL);
	req = (struct fw_ofld_connection_wr *)__skb_put(req_skb, sizeof(*req));
	memset(req, 0, sizeof(*req));
3748
	req->op_compl = htonl(WR_OP_V(FW_OFLD_CONNECTION_WR) | FW_WR_COMPL_F);
3749
	req->len16_pkd = htonl(FW_WR_LEN16_V(DIV_ROUND_UP(sizeof(*req), 16)));
3750
	req->le.version_cpl = htonl(FW_OFLD_CONNECTION_WR_CPL_F);
3751
	req->le.filter = (__force __be32) filter;
3752 3753 3754 3755 3756 3757 3758
	req->le.lport = lport;
	req->le.pport = rport;
	req->le.u.ipv4.lip = laddr;
	req->le.u.ipv4.pip = raddr;
	req->tcb.rcv_nxt = htonl(rcv_isn + 1);
	req->tcb.rcv_adv = htons(window);
	req->tcb.t_state_to_astid =
3759 3760 3761
		 htonl(FW_OFLD_CONNECTION_WR_T_STATE_V(TCP_SYN_RECV) |
			FW_OFLD_CONNECTION_WR_RCV_SCALE_V(cpl->tcpopt.wsf) |
			FW_OFLD_CONNECTION_WR_ASTID_V(
3762
			PASS_OPEN_TID_G(ntohl(cpl->tos_stid))));
3763 3764 3765 3766 3767

	/*
	 * We store the qid in opt2 which will be used by the firmware
	 * to send us the wr response.
	 */
3768
	req->tcb.opt2 = htonl(RSS_QUEUE_V(rss_qid));
3769 3770 3771 3772 3773 3774 3775

	/*
	 * We initialize the MSS index in TCB to 0xF.
	 * So that when driver sends cpl_pass_accept_rpl
	 * TCB picks up the correct value. If this was 0
	 * TP will ignore any value > 0 for MSS index.
	 */
3776
	req->tcb.opt0 = cpu_to_be64(MSS_IDX_V(0xF));
H
Hariprasad S 已提交
3777
	req->cookie = (uintptr_t)skb;
3778 3779

	set_wr_txq(req_skb, CPL_PRIORITY_CONTROL, port_id);
3780 3781 3782 3783 3784 3785 3786
	ret = cxgb4_ofld_send(dev->rdev.lldi.ports[0], req_skb);
	if (ret < 0) {
		pr_err("%s - cxgb4_ofld_send error %d - dropping\n", __func__,
		       ret);
		kfree_skb(skb);
		kfree_skb(req_skb);
	}
3787 3788 3789 3790 3791 3792 3793 3794 3795 3796 3797 3798 3799 3800 3801 3802 3803 3804 3805 3806 3807 3808 3809 3810 3811 3812
}

/*
 * Handler for CPL_RX_PKT message. Need to handle cpl_rx_pkt
 * messages when a filter is being used instead of server to
 * redirect a syn packet. When packets hit filter they are redirected
 * to the offload queue and driver tries to establish the connection
 * using firmware work request.
 */
static int rx_pkt(struct c4iw_dev *dev, struct sk_buff *skb)
{
	int stid;
	unsigned int filter;
	struct ethhdr *eh = NULL;
	struct vlan_ethhdr *vlan_eh = NULL;
	struct iphdr *iph;
	struct tcphdr *tcph;
	struct rss_header *rss = (void *)skb->data;
	struct cpl_rx_pkt *cpl = (void *)skb->data;
	struct cpl_pass_accept_req *req = (void *)(rss + 1);
	struct l2t_entry *e;
	struct dst_entry *dst;
	struct c4iw_ep *lep;
	u16 window;
	struct port_info *pi;
	struct net_device *pdev;
3813
	u16 rss_qid, eth_hdr_len;
3814 3815 3816 3817 3818
	int step;
	u32 tx_chan;
	struct neighbour *neigh;

	/* Drop all non-SYN packets */
3819
	if (!(cpl->l2info & cpu_to_be32(RXF_SYN_F)))
3820 3821 3822 3823 3824 3825 3826 3827 3828 3829 3830 3831
		goto reject;

	/*
	 * Drop all packets which did not hit the filter.
	 * Unlikely to happen.
	 */
	if (!(rss->filter_hit && rss->filter_tid))
		goto reject;

	/*
	 * Calculate the server tid from filter hit index from cpl_rx_pkt.
	 */
3832
	stid = (__force int) cpu_to_be32((__force u32) rss->hash_val);
3833 3834 3835 3836 3837 3838 3839

	lep = (struct c4iw_ep *)lookup_stid(dev->rdev.lldi.tids, stid);
	if (!lep) {
		PDBG("%s connect request on invalid stid %d\n", __func__, stid);
		goto reject;
	}

3840 3841 3842 3843 3844 3845 3846 3847 3848 3849 3850 3851 3852 3853 3854 3855
	switch (CHELSIO_CHIP_VERSION(dev->rdev.lldi.adapter_type)) {
	case CHELSIO_T4:
		eth_hdr_len = RX_ETHHDR_LEN_G(be32_to_cpu(cpl->l2info));
		break;
	case CHELSIO_T5:
		eth_hdr_len = RX_T5_ETHHDR_LEN_G(be32_to_cpu(cpl->l2info));
		break;
	case CHELSIO_T6:
		eth_hdr_len = RX_T6_ETHHDR_LEN_G(be32_to_cpu(cpl->l2info));
		break;
	default:
		pr_err("T%d Chip is not supported\n",
		       CHELSIO_CHIP_VERSION(dev->rdev.lldi.adapter_type));
		goto reject;
	}

3856
	if (eth_hdr_len == ETH_HLEN) {
3857 3858 3859 3860 3861 3862 3863 3864 3865 3866 3867 3868 3869 3870 3871 3872 3873 3874 3875 3876
		eh = (struct ethhdr *)(req + 1);
		iph = (struct iphdr *)(eh + 1);
	} else {
		vlan_eh = (struct vlan_ethhdr *)(req + 1);
		iph = (struct iphdr *)(vlan_eh + 1);
		skb->vlan_tci = ntohs(cpl->vlan);
	}

	if (iph->version != 0x4)
		goto reject;

	tcph = (struct tcphdr *)(iph + 1);
	skb_set_network_header(skb, (void *)iph - (void *)rss);
	skb_set_transport_header(skb, (void *)tcph - (void *)rss);
	skb_get(skb);

	PDBG("%s lip 0x%x lport %u pip 0x%x pport %u tos %d\n", __func__,
	     ntohl(iph->daddr), ntohs(tcph->dest), ntohl(iph->saddr),
	     ntohs(tcph->source), iph->tos);

3877 3878 3879
	dst = find_route(dev, iph->daddr, iph->saddr, tcph->dest, tcph->source,
			 iph->tos);
	if (!dst) {
3880 3881 3882 3883 3884 3885
		pr_err("%s - failed to find dst entry!\n",
		       __func__);
		goto reject;
	}
	neigh = dst_neigh_lookup_skb(dst, skb);

3886 3887 3888 3889 3890 3891
	if (!neigh) {
		pr_err("%s - failed to allocate neigh!\n",
		       __func__);
		goto free_dst;
	}

3892 3893 3894 3895 3896 3897 3898 3899
	if (neigh->dev->flags & IFF_LOOPBACK) {
		pdev = ip_dev_find(&init_net, iph->daddr);
		e = cxgb4_l2t_get(dev->rdev.lldi.l2t, neigh,
				    pdev, 0);
		pi = (struct port_info *)netdev_priv(pdev);
		tx_chan = cxgb4_port_chan(pdev);
		dev_put(pdev);
	} else {
3900
		pdev = get_real_dev(neigh->dev);
3901
		e = cxgb4_l2t_get(dev->rdev.lldi.l2t, neigh,
3902 3903 3904
					pdev, 0);
		pi = (struct port_info *)netdev_priv(pdev);
		tx_chan = cxgb4_port_chan(pdev);
3905
	}
3906
	neigh_release(neigh);
3907 3908 3909 3910 3911 3912 3913 3914
	if (!e) {
		pr_err("%s - failed to allocate l2t entry!\n",
		       __func__);
		goto free_dst;
	}

	step = dev->rdev.lldi.nrxq / dev->rdev.lldi.nchan;
	rss_qid = dev->rdev.lldi.rxq_ids[pi->port_id * step];
3915
	window = (__force u16) htons((__force u16)tcph->window);
3916 3917

	/* Calcuate filter portion for LE region. */
3918 3919 3920
	filter = (__force unsigned int) cpu_to_be32(cxgb4_select_ntuple(
						    dev->rdev.lldi.ports[0],
						    e));
3921 3922 3923 3924 3925 3926 3927 3928 3929 3930 3931 3932 3933 3934

	/*
	 * Synthesize the cpl_pass_accept_req. We have everything except the
	 * TID. Once firmware sends a reply with TID we update the TID field
	 * in cpl and pass it through the regular cpl_pass_accept_req path.
	 */
	build_cpl_pass_accept_req(skb, stid, iph->tos);
	send_fw_pass_open_req(dev, skb, iph->daddr, tcph->dest, iph->saddr,
			      tcph->source, ntohl(tcph->seq), filter, window,
			      rss_qid, pi->port_id);
	cxgb4_l2t_release(e);
free_dst:
	dst_release(dst);
reject:
3935 3936 3937
	return 0;
}

3938 3939 3940 3941
/*
 * These are the real handlers that are called from a
 * work queue.
 */
3942
static c4iw_handler_func work_handlers[NUM_CPL_CMDS + NUM_FAKE_CPLS] = {
3943 3944 3945 3946 3947 3948 3949 3950 3951 3952 3953 3954 3955
	[CPL_ACT_ESTABLISH] = act_establish,
	[CPL_ACT_OPEN_RPL] = act_open_rpl,
	[CPL_RX_DATA] = rx_data,
	[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,
3956
	[CPL_FW4_ACK] = fw4_ack,
3957
	[CPL_FW6_MSG] = deferred_fw6_msg,
3958
	[CPL_RX_PKT] = rx_pkt,
3959 3960
	[FAKE_CPL_PUT_EP_SAFE] = _put_ep_safe,
	[FAKE_CPL_PASS_PUT_EP_SAFE] = _put_pass_ep_safe
3961 3962 3963 3964 3965 3966 3967
};

static void process_timeout(struct c4iw_ep *ep)
{
	struct c4iw_qp_attributes attrs;
	int abort = 1;

3968
	mutex_lock(&ep->com.mutex);
3969 3970
	PDBG("%s ep %p tid %u state %d\n", __func__, ep, ep->hwtid,
	     ep->com.state);
3971
	set_bit(TIMEDOUT, &ep->com.history);
3972 3973 3974 3975 3976
	switch (ep->com.state) {
	case MPA_REQ_SENT:
		connect_reply_upcall(ep, -ETIMEDOUT);
		break;
	case MPA_REQ_WAIT:
3977
	case MPA_REP_SENT:
3978 3979 3980 3981 3982 3983 3984 3985 3986
		break;
	case CLOSING:
	case MORIBUND:
		if (ep->com.cm_id && ep->com.qp) {
			attrs.next_state = C4IW_QP_STATE_ERROR;
			c4iw_modify_qp(ep->com.qp->rhp,
				     ep->com.qp, C4IW_QP_ATTR_NEXT_STATE,
				     &attrs, 1);
		}
3987
		close_complete_upcall(ep, -ETIMEDOUT);
3988
		break;
S
Steve Wise 已提交
3989 3990 3991 3992 3993 3994 3995 3996 3997 3998
	case ABORTING:
	case DEAD:

		/*
		 * These states are expected if the ep timed out at the same
		 * time as another thread was calling stop_ep_timer().
		 * So we silently do nothing for these states.
		 */
		abort = 0;
		break;
3999
	default:
J
Julia Lawall 已提交
4000
		WARN(1, "%s unexpected state ep %p tid %u state %u\n",
4001 4002 4003
			__func__, ep, ep->hwtid, ep->com.state);
		abort = 0;
	}
4004
	mutex_unlock(&ep->com.mutex);
4005 4006
	if (abort)
		c4iw_ep_disconnect(ep, 1, GFP_KERNEL);
4007 4008 4009 4010 4011 4012 4013 4014 4015 4016 4017 4018 4019
	c4iw_put_ep(&ep->com);
}

static void process_timedout_eps(void)
{
	struct c4iw_ep *ep;

	spin_lock_irq(&timeout_lock);
	while (!list_empty(&timeout_list)) {
		struct list_head *tmp;

		tmp = timeout_list.next;
		list_del(tmp);
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		tmp->next = NULL;
		tmp->prev = NULL;
4022 4023 4024 4025 4026 4027 4028 4029 4030 4031 4032 4033
		spin_unlock_irq(&timeout_lock);
		ep = list_entry(tmp, struct c4iw_ep, entry);
		process_timeout(ep);
		spin_lock_irq(&timeout_lock);
	}
	spin_unlock_irq(&timeout_lock);
}

static void process_work(struct work_struct *work)
{
	struct sk_buff *skb = NULL;
	struct c4iw_dev *dev;
4034
	struct cpl_act_establish *rpl;
4035 4036 4037
	unsigned int opcode;
	int ret;

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	process_timedout_eps();
4039 4040 4041 4042 4043 4044 4045 4046 4047
	while ((skb = skb_dequeue(&rxq))) {
		rpl = cplhdr(skb);
		dev = *((struct c4iw_dev **) (skb->cb + sizeof(void *)));
		opcode = rpl->ot.opcode;

		BUG_ON(!work_handlers[opcode]);
		ret = work_handlers[opcode](dev, skb);
		if (!ret)
			kfree_skb(skb);
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		process_timedout_eps();
4049 4050 4051 4052 4053 4054 4055 4056
	}
}

static DECLARE_WORK(skb_work, process_work);

static void ep_timeout(unsigned long arg)
{
	struct c4iw_ep *ep = (struct c4iw_ep *)arg;
4057
	int kickit = 0;
4058 4059

	spin_lock(&timeout_lock);
4060
	if (!test_and_set_bit(TIMEOUT, &ep->com.flags)) {
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		/*
		 * Only insert if it is not already on the list.
		 */
		if (!ep->entry.next) {
			list_add_tail(&ep->entry, &timeout_list);
			kickit = 1;
		}
4068
	}
4069
	spin_unlock(&timeout_lock);
4070 4071
	if (kickit)
		queue_work(workq, &skb_work);
4072 4073
}

4074 4075 4076 4077 4078 4079 4080 4081 4082 4083 4084 4085 4086 4087 4088 4089 4090 4091 4092 4093 4094 4095 4096 4097 4098 4099 4100
/*
 * All the CM events are handled on a work queue to have a safe context.
 */
static int sched(struct c4iw_dev *dev, struct sk_buff *skb)
{

	/*
	 * Save dev in the skb->cb area.
	 */
	*((struct c4iw_dev **) (skb->cb + sizeof(void *))) = dev;

	/*
	 * 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 c4iw_dev *dev, struct sk_buff *skb)
{
	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));
	}
4101
	kfree_skb(skb);
4102 4103 4104
	return 0;
}

4105 4106 4107 4108 4109 4110 4111 4112 4113
static int fw6_msg(struct c4iw_dev *dev, struct sk_buff *skb)
{
	struct cpl_fw6_msg *rpl = cplhdr(skb);
	struct c4iw_wr_wait *wr_waitp;
	int ret;

	PDBG("%s type %u\n", __func__, rpl->type);

	switch (rpl->type) {
4114
	case FW6_TYPE_WR_RPL:
4115
		ret = (int)((be64_to_cpu(rpl->data[0]) >> 8) & 0xff);
4116
		wr_waitp = (struct c4iw_wr_wait *)(__force unsigned long) rpl->data[1];
4117
		PDBG("%s wr_waitp %p ret %u\n", __func__, wr_waitp, ret);
4118 4119
		if (wr_waitp)
			c4iw_wake_up(wr_waitp, ret ? -ret : 0);
4120
		kfree_skb(skb);
4121
		break;
4122 4123
	case FW6_TYPE_CQE:
	case FW6_TYPE_OFLD_CONNECTION_WR_RPL:
4124
		sched(dev, skb);
4125
		break;
4126 4127 4128
	default:
		printk(KERN_ERR MOD "%s unexpected fw6 msg type %u\n", __func__,
		       rpl->type);
4129
		kfree_skb(skb);
4130 4131 4132 4133 4134
		break;
	}
	return 0;
}

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static int peer_abort_intr(struct c4iw_dev *dev, struct sk_buff *skb)
{
	struct cpl_abort_req_rss *req = cplhdr(skb);
	struct c4iw_ep *ep;
	struct tid_info *t = dev->rdev.lldi.tids;
	unsigned int tid = GET_TID(req);

	ep = lookup_tid(t, tid);
4143 4144 4145 4146 4147 4148
	if (!ep) {
		printk(KERN_WARNING MOD
		       "Abort on non-existent endpoint, tid %d\n", tid);
		kfree_skb(skb);
		return 0;
	}
4149
	if (is_neg_adv(req->status)) {
4150 4151 4152 4153 4154
		PDBG("%s Negative advice on abort- tid %u status %d (%s)\n",
		     __func__, ep->hwtid, req->status,
		     neg_adv_str(req->status));
		ep->stats.abort_neg_adv++;
		dev->rdev.stats.neg_adv++;
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		kfree_skb(skb);
		return 0;
	}
	PDBG("%s ep %p tid %u state %u\n", __func__, ep, ep->hwtid,
	     ep->com.state);

	/*
	 * Wake up any threads in rdma_init() or rdma_fini().
4163 4164
	 * However, if we are on MPAv2 and want to retry with MPAv1
	 * then, don't wake up yet.
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	 */
4166 4167 4168 4169 4170
	if (mpa_rev == 2 && !ep->tried_with_mpa_v1) {
		if (ep->com.state != MPA_REQ_SENT)
			c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
	} else
		c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
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	sched(dev, skb);
	return 0;
}

4175 4176 4177 4178 4179 4180 4181 4182 4183 4184 4185 4186 4187 4188 4189 4190
/*
 * Most upcalls from the T4 Core go to sched() to
 * schedule the processing on a work queue.
 */
c4iw_handler_func c4iw_handlers[NUM_CPL_CMDS] = {
	[CPL_ACT_ESTABLISH] = sched,
	[CPL_ACT_OPEN_RPL] = sched,
	[CPL_RX_DATA] = 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,
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	[CPL_ABORT_REQ_RSS] = peer_abort_intr,
4192 4193 4194
	[CPL_RDMA_TERMINATE] = sched,
	[CPL_FW4_ACK] = sched,
	[CPL_SET_TCB_RPL] = set_tcb_rpl,
4195 4196
	[CPL_FW6_MSG] = fw6_msg,
	[CPL_RX_PKT] = sched
4197 4198
};

4199 4200
int __init c4iw_cm_init(void)
{
4201
	spin_lock_init(&timeout_lock);
4202 4203 4204 4205 4206 4207 4208 4209 4210
	skb_queue_head_init(&rxq);

	workq = create_singlethread_workqueue("iw_cxgb4");
	if (!workq)
		return -ENOMEM;

	return 0;
}

4211
void c4iw_cm_term(void)
4212
{
4213
	WARN_ON(!list_empty(&timeout_list));
4214 4215 4216
	flush_workqueue(workq);
	destroy_workqueue(workq);
}