cm.c 108.8 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"

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)");

static int mpa_rev = 1;
module_param(mpa_rev, int, 0644);
MODULE_PARM_DESC(mpa_rev, "MPA Revision, 0 supports amso1100, "
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		"1 is RFC0544 spec compliant, 2 is IETF MPA Peer Connect Draft"
		" compliant (default=1)");
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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 LIST_HEAD(timeout_list);
static spinlock_t timeout_lock;

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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);
}

static void ref_qp(struct c4iw_ep *ep)
{
	set_bit(QP_REFERENCED, &ep->com.flags);
	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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	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[GET_TCPOPT_MSS(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;
	if (GET_TCPOPT_TSTAMP(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",
		     GET_TCPOPT_MSS(opt), ep->mss, ep->emss);
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	PDBG("%s mss_idx %u mss %u emss=%u\n", __func__, GET_TCPOPT_MSS(opt),
	     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);
	PDBG("%s ep %p state %s\n", __func__, ep, states[state_read(&ep->com)]);
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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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		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);
	}
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	if (test_bit(RELEASE_MAPINFO, &ep->com.flags)) {
		print_addr(&ep->com, __func__, "remove_mapinfo/mapping");
		iwpm_remove_mapinfo(&ep->com.local_addr,
				    &ep->com.mapped_local_addr);
		iwpm_remove_mapping(&ep->com.local_addr, RDMA_NL_C4IW);
	}
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	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)
{
	PDBG("%s c4iw_dev %p\n", __func__, handle);
	kfree_skb(skb);
}

/*
 * 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 duing connect\n");
	kfree_skb(skb);
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	connect_reply_upcall(ep, -EHOSTUNREACH);
	state_set(&ep->com, DEAD);
	remove_handle(ep->com.dev, &ep->com.dev->atid_idr, ep->atid);
	cxgb4_free_atid(ep->com.dev->rdev.lldi.tids, ep->atid);
	dst_release(ep->dst);
	cxgb4_l2t_release(ep->l2t);
	c4iw_put_ep(&ep->com);
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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);
}

static void send_flowc(struct c4iw_ep *ep, struct sk_buff *skb)
{
	unsigned int flowclen = 80;
	struct fw_flowc_wr *flowc;
	int i;

	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) |
					   FW_FLOWC_WR_NPARAMS_V(8));
	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
					    (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;
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	flowc->mnemval[6].val = cpu_to_be32(ep->snd_win);
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	flowc->mnemval[7].mnemonic = FW_FLOWC_MNEM_MSS;
	flowc->mnemval[7].val = cpu_to_be32(ep->emss);
	/* Pad WR to 16 byte boundary */
	flowc->mnemval[8].mnemonic = 0;
	flowc->mnemval[8].val = 0;
	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);
	c4iw_ofld_send(&ep->com.dev->rdev, skb);
}

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);
}

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/*
 * c4iw_form_pm_msg - Form a port mapper message with mapping info
 */
static void c4iw_form_pm_msg(struct c4iw_ep *ep,
				struct iwpm_sa_data *pm_msg)
{
	memcpy(&pm_msg->loc_addr, &ep->com.local_addr,
		sizeof(ep->com.local_addr));
	memcpy(&pm_msg->rem_addr, &ep->com.remote_addr,
		sizeof(ep->com.remote_addr));
}

/*
 * c4iw_form_reg_msg - Form a port mapper message with dev info
 */
static void c4iw_form_reg_msg(struct c4iw_dev *dev,
				struct iwpm_dev_data *pm_msg)
{
	memcpy(pm_msg->dev_name, dev->ibdev.name, IWPM_DEVNAME_SIZE);
	memcpy(pm_msg->if_name, dev->rdev.lldi.ports[0]->name,
				IWPM_IFNAME_SIZE);
}

static void c4iw_record_pm_msg(struct c4iw_ep *ep,
			struct iwpm_sa_data *pm_msg)
{
	memcpy(&ep->com.mapped_local_addr, &pm_msg->mapped_loc_addr,
		sizeof(ep->com.mapped_local_addr));
	memcpy(&ep->com.mapped_remote_addr, &pm_msg->mapped_rem_addr,
		sizeof(ep->com.mapped_remote_addr));
}

586
static void best_mtu(const unsigned short *mtus, unsigned short mtu,
587
		     unsigned int *idx, int use_ts, int ipv6)
588
{
589 590 591
	unsigned short hdr_size = (ipv6 ?
				   sizeof(struct ipv6hdr) :
				   sizeof(struct iphdr)) +
592
				  sizeof(struct tcphdr) +
593 594
				  (use_ts ?
				   round_up(TCPOLEN_TIMESTAMP, 4) : 0);
595 596 597 598 599
	unsigned short data_size = mtu - hdr_size;

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

600 601 602
static int send_connect(struct c4iw_ep *ep)
{
	struct cpl_act_open_req *req;
603
	struct cpl_t5_act_open_req *t5_req;
604 605
	struct cpl_act_open_req6 *req6;
	struct cpl_t5_act_open_req6 *t5_req6;
606 607 608 609 610
	struct sk_buff *skb;
	u64 opt0;
	u32 opt2;
	unsigned int mtu_idx;
	int wscale;
611 612 613 614 615 616 617
	int wrlen;
	int sizev4 = is_t4(ep->com.dev->rdev.lldi.adapter_type) ?
				sizeof(struct cpl_act_open_req) :
				sizeof(struct cpl_t5_act_open_req);
	int sizev6 = is_t4(ep->com.dev->rdev.lldi.adapter_type) ?
				sizeof(struct cpl_act_open_req6) :
				sizeof(struct cpl_t5_act_open_req6);
618 619 620 621 622 623 624 625
	struct sockaddr_in *la = (struct sockaddr_in *)
				 &ep->com.mapped_local_addr;
	struct sockaddr_in *ra = (struct sockaddr_in *)
				 &ep->com.mapped_remote_addr;
	struct sockaddr_in6 *la6 = (struct sockaddr_in6 *)
				   &ep->com.mapped_local_addr;
	struct sockaddr_in6 *ra6 = (struct sockaddr_in6 *)
				   &ep->com.mapped_remote_addr;
626
	int win;
627 628 629 630

	wrlen = (ep->com.remote_addr.ss_family == AF_INET) ?
			roundup(sizev4, 16) :
			roundup(sizev6, 16);
631 632 633 634 635 636 637 638 639

	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
640
	set_wr_txq(skb, CPL_PRIORITY_SETUP, ep->ctrlq_idx);
641

642
	best_mtu(ep->com.dev->rdev.lldi.mtus, ep->mtu, &mtu_idx,
643 644
		 enable_tcp_timestamps,
		 (AF_INET == ep->com.remote_addr.ss_family) ? 0 : 1);
645
	wscale = compute_wscale(rcv_win);
646 647 648 649 650 651 652 653 654

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

655 656
	opt0 = (nocong ? NO_CONG(1) : 0) |
	       KEEP_ALIVE(1) |
657
	       DELACK(1) |
658 659 660 661 662 663
	       WND_SCALE(wscale) |
	       MSS_IDX(mtu_idx) |
	       L2T_IDX(ep->l2t->idx) |
	       TX_CHAN(ep->tx_chan) |
	       SMAC_SEL(ep->smac_idx) |
	       DSCP(ep->tos) |
S
Steve Wise 已提交
664
	       ULP_MODE(ULP_MODE_TCPDDP) |
665
	       RCV_BUFSIZ(win);
666
	opt2 = RX_CHANNEL(0) |
667
	       CCTRL_ECN(enable_ecn) |
668 669 670 671 672 673 674
	       RSS_QUEUE_VALID | RSS_QUEUE(ep->rss_qid);
	if (enable_tcp_timestamps)
		opt2 |= TSTAMPS_EN(1);
	if (enable_tcp_sack)
		opt2 |= SACK_EN(1);
	if (wscale && enable_tcp_window_scaling)
		opt2 |= WND_SCALE_EN(1);
675 676 677
	if (is_t5(ep->com.dev->rdev.lldi.adapter_type)) {
		opt2 |= T5_OPT_2_VALID;
		opt2 |= V_CONG_CNTRL(CONG_ALG_TAHOE);
678
		opt2 |= CONG_CNTRL_VALID; /* OPT_2_ISS for T5 */
679
	}
680
	t4_set_arp_err_handler(skb, ep, act_open_req_arp_failure);
681

682
	if (is_t4(ep->com.dev->rdev.lldi.adapter_type)) {
683 684 685 686 687 688 689 690 691 692 693
		if (ep->com.remote_addr.ss_family == AF_INET) {
			req = (struct cpl_act_open_req *) skb_put(skb, wrlen);
			INIT_TP_WR(req, 0);
			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);
694 695 696
			req->params = cpu_to_be32(cxgb4_select_ntuple(
						ep->com.dev->rdev.lldi.ports[0],
						ep->l2t));
697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715
			req->opt2 = cpu_to_be32(opt2);
		} else {
			req6 = (struct cpl_act_open_req6 *)skb_put(skb, wrlen);

			INIT_TP_WR(req6, 0);
			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);
716 717 718
			req6->params = cpu_to_be32(cxgb4_select_ntuple(
						ep->com.dev->rdev.lldi.ports[0],
						ep->l2t));
719 720
			req6->opt2 = cpu_to_be32(opt2);
		}
721
	} else {
722 723 724 725 726
		u32 isn = (prandom_u32() & ~7UL) - 1;

		if (peer2peer)
			isn += 4;

727 728 729 730 731
		if (ep->com.remote_addr.ss_family == AF_INET) {
			t5_req = (struct cpl_t5_act_open_req *)
				 skb_put(skb, wrlen);
			INIT_TP_WR(t5_req, 0);
			OPCODE_TID(t5_req) = cpu_to_be32(
732 733
					MK_OPCODE_TID(CPL_ACT_OPEN_REQ,
					((ep->rss_qid << 14) | ep->atid)));
734 735 736 737 738 739
			t5_req->local_port = la->sin_port;
			t5_req->peer_port = ra->sin_port;
			t5_req->local_ip = la->sin_addr.s_addr;
			t5_req->peer_ip = ra->sin_addr.s_addr;
			t5_req->opt0 = cpu_to_be64(opt0);
			t5_req->params = cpu_to_be64(V_FILTER_TUPLE(
740 741 742
						     cxgb4_select_ntuple(
					     ep->com.dev->rdev.lldi.ports[0],
					     ep->l2t)));
743 744 745
			t5_req->rsvd = cpu_to_be32(isn);
			PDBG("%s snd_isn %u\n", __func__,
			     be32_to_cpu(t5_req->rsvd));
746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764
			t5_req->opt2 = cpu_to_be32(opt2);
		} else {
			t5_req6 = (struct cpl_t5_act_open_req6 *)
				  skb_put(skb, wrlen);
			INIT_TP_WR(t5_req6, 0);
			OPCODE_TID(t5_req6) = cpu_to_be32(
					      MK_OPCODE_TID(CPL_ACT_OPEN_REQ6,
					      ((ep->rss_qid<<14)|ep->atid)));
			t5_req6->local_port = la6->sin6_port;
			t5_req6->peer_port = ra6->sin6_port;
			t5_req6->local_ip_hi = *((__be64 *)
						(la6->sin6_addr.s6_addr));
			t5_req6->local_ip_lo = *((__be64 *)
						(la6->sin6_addr.s6_addr + 8));
			t5_req6->peer_ip_hi = *((__be64 *)
						(ra6->sin6_addr.s6_addr));
			t5_req6->peer_ip_lo = *((__be64 *)
						(ra6->sin6_addr.s6_addr + 8));
			t5_req6->opt0 = cpu_to_be64(opt0);
765
			t5_req6->params = cpu_to_be64(V_FILTER_TUPLE(
766 767
							cxgb4_select_ntuple(
						ep->com.dev->rdev.lldi.ports[0],
768
						ep->l2t)));
769 770 771
			t5_req6->rsvd = cpu_to_be32(isn);
			PDBG("%s snd_isn %u\n", __func__,
			     be32_to_cpu(t5_req6->rsvd));
772 773
			t5_req6->opt2 = cpu_to_be32(opt2);
		}
774 775
	}

776
	set_bit(ACT_OPEN_REQ, &ep->com.history);
777 778 779
	return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
}

780 781
static void send_mpa_req(struct c4iw_ep *ep, struct sk_buff *skb,
		u8 mpa_rev_to_use)
782 783 784 785
{
	int mpalen, wrlen;
	struct fw_ofld_tx_data_wr *req;
	struct mpa_message *mpa;
786
	struct mpa_v2_conn_params mpa_v2_params;
787 788 789 790 791 792

	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;
793 794
	if (mpa_rev_to_use == 2)
		mpalen += sizeof(struct mpa_v2_conn_params);
795 796 797 798 799 800 801 802 803 804 805
	wrlen = roundup(mpalen + sizeof *req, 16);
	skb = get_skb(skb, wrlen, GFP_KERNEL);
	if (!skb) {
		connect_reply_upcall(ep, -ENOMEM);
		return;
	}
	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(
806 807 808
		FW_WR_OP_V(FW_OFLD_TX_DATA_WR) |
		FW_WR_COMPL_F |
		FW_WR_IMMDLEN_V(mpalen));
809
	req->flowid_len16 = cpu_to_be32(
810 811
		FW_WR_FLOWID_V(ep->hwtid) |
		FW_WR_LEN16_V(wrlen >> 4));
812 813
	req->plen = cpu_to_be32(mpalen);
	req->tunnel_to_proxy = cpu_to_be32(
814 815
		FW_OFLD_TX_DATA_WR_FLUSH_F |
		FW_OFLD_TX_DATA_WR_SHOVE_F);
816 817 818 819

	mpa = (struct mpa_message *)(req + 1);
	memcpy(mpa->key, MPA_KEY_REQ, sizeof(mpa->key));
	mpa->flags = (crc_enabled ? MPA_CRC : 0) |
820 821
		     (markers_enabled ? MPA_MARKERS : 0) |
		     (mpa_rev_to_use == 2 ? MPA_ENHANCED_RDMA_CONN : 0);
822
	mpa->private_data_size = htons(ep->plen);
823
	mpa->revision = mpa_rev_to_use;
824
	if (mpa_rev_to_use == 1) {
825
		ep->tried_with_mpa_v1 = 1;
826 827
		ep->retry_with_mpa_v1 = 0;
	}
828 829

	if (mpa_rev_to_use == 2) {
830 831
		mpa->private_data_size = htons(ntohs(mpa->private_data_size) +
					       sizeof (struct mpa_v2_conn_params));
832 833
		PDBG("%s initiator ird %u ord %u\n", __func__, ep->ird,
		     ep->ord);
834 835 836 837 838 839 840 841 842 843 844 845 846 847
		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));
848

849 850 851 852 853 854 855 856
		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);
857 858 859 860 861 862 863 864 865 866 867 868

	/*
	 * 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;
	c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
	start_ep_timer(ep);
869
	__state_set(&ep->com, MPA_REQ_SENT);
870
	ep->mpa_attr.initiator = 1;
871
	ep->snd_seq += mpalen;
872 873 874 875 876 877 878 879 880
	return;
}

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;
881
	struct mpa_v2_conn_params mpa_v2_params;
882 883 884 885

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

	mpalen = sizeof(*mpa) + plen;
886 887
	if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn)
		mpalen += sizeof(struct mpa_v2_conn_params);
888 889 890 891 892 893 894 895 896 897 898 899
	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(
900 901 902
		FW_WR_OP_V(FW_OFLD_TX_DATA_WR) |
		FW_WR_COMPL_F |
		FW_WR_IMMDLEN_V(mpalen));
903
	req->flowid_len16 = cpu_to_be32(
904 905
		FW_WR_FLOWID_V(ep->hwtid) |
		FW_WR_LEN16_V(wrlen >> 4));
906 907
	req->plen = cpu_to_be32(mpalen);
	req->tunnel_to_proxy = cpu_to_be32(
908 909
		FW_OFLD_TX_DATA_WR_FLUSH_F |
		FW_OFLD_TX_DATA_WR_SHOVE_F);
910 911 912 913 914

	mpa = (struct mpa_message *)(req + 1);
	memset(mpa, 0, sizeof(*mpa));
	memcpy(mpa->key, MPA_KEY_REP, sizeof(mpa->key));
	mpa->flags = MPA_REJECT;
915
	mpa->revision = ep->mpa_attr.version;
916
	mpa->private_data_size = htons(plen);
917 918 919

	if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) {
		mpa->flags |= MPA_ENHANCED_RDMA_CONN;
920 921
		mpa->private_data_size = htons(ntohs(mpa->private_data_size) +
					       sizeof (struct mpa_v2_conn_params));
922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939
		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);
940 941 942 943 944 945 946 947 948 949 950

	/*
	 * 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);
	t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
	BUG_ON(ep->mpa_skb);
	ep->mpa_skb = skb;
951
	ep->snd_seq += mpalen;
952 953 954 955 956 957 958 959 960
	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;
961
	struct mpa_v2_conn_params mpa_v2_params;
962 963 964 965

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

	mpalen = sizeof(*mpa) + plen;
966 967
	if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn)
		mpalen += sizeof(struct mpa_v2_conn_params);
968 969 970 971 972 973 974 975 976 977 978 979
	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(
980 981 982
		FW_WR_OP_V(FW_OFLD_TX_DATA_WR) |
		FW_WR_COMPL_F |
		FW_WR_IMMDLEN_V(mpalen));
983
	req->flowid_len16 = cpu_to_be32(
984 985
		FW_WR_FLOWID_V(ep->hwtid) |
		FW_WR_LEN16_V(wrlen >> 4));
986 987
	req->plen = cpu_to_be32(mpalen);
	req->tunnel_to_proxy = cpu_to_be32(
988 989
		FW_OFLD_TX_DATA_WR_FLUSH_F |
		FW_OFLD_TX_DATA_WR_SHOVE_F);
990 991 992 993 994 995

	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);
996
	mpa->revision = ep->mpa_attr.version;
997
	mpa->private_data_size = htons(plen);
998 999 1000

	if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) {
		mpa->flags |= MPA_ENHANCED_RDMA_CONN;
1001 1002
		mpa->private_data_size = htons(ntohs(mpa->private_data_size) +
					       sizeof (struct mpa_v2_conn_params));
1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025
		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);
1026 1027 1028 1029 1030 1031 1032 1033 1034

	/*
	 * 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);
	ep->mpa_skb = skb;
1035
	__state_set(&ep->com, MPA_REP_SENT);
1036
	ep->snd_seq += mpalen;
1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052
	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);
	unsigned int atid = GET_TID_TID(ntohl(req->tos_atid));
	struct tid_info *t = dev->rdev.lldi.tids;

	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));

1053
	mutex_lock(&ep->com.mutex);
1054 1055 1056 1057 1058
	dst_confirm(ep->dst);

	/* setup the hwtid for this connection */
	ep->hwtid = tid;
	cxgb4_insert_tid(t, ep, tid);
1059
	insert_handle(dev, &dev->hwtid_idr, ep, ep->hwtid);
1060 1061 1062 1063 1064 1065 1066

	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 */
1067
	remove_handle(ep->com.dev, &ep->com.dev->atid_idr, atid);
1068
	cxgb4_free_atid(t, atid);
1069
	set_bit(ACT_ESTAB, &ep->com.history);
1070 1071 1072

	/* start MPA negotiation */
	send_flowc(ep, NULL);
1073 1074 1075 1076
	if (ep->retry_with_mpa_v1)
		send_mpa_req(ep, skb, 1);
	else
		send_mpa_req(ep, skb, mpa_rev);
1077
	mutex_unlock(&ep->com.mutex);
1078 1079 1080
	return 0;
}

1081
static void close_complete_upcall(struct c4iw_ep *ep, int status)
1082 1083 1084 1085 1086 1087
{
	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;
1088
	event.status = status;
1089 1090 1091 1092 1093 1094
	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);
		ep->com.cm_id->rem_ref(ep->com.cm_id);
		ep->com.cm_id = NULL;
1095
		set_bit(CLOSE_UPCALL, &ep->com.history);
1096 1097 1098 1099 1100 1101
	}
}

static int abort_connection(struct c4iw_ep *ep, struct sk_buff *skb, gfp_t gfp)
{
	PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1102
	__state_set(&ep->com, ABORTING);
1103
	set_bit(ABORT_CONN, &ep->com.history);
1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117
	return send_abort(ep, skb, gfp);
}

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);
1118
		set_bit(DISCONN_UPCALL, &ep->com.history);
1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135
	}
}

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);
		ep->com.cm_id->rem_ref(ep->com.cm_id);
		ep->com.cm_id = NULL;
1136
		set_bit(ABORT_UPCALL, &ep->com.history);
1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147
	}
}

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;
1148 1149 1150 1151
	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));
1152 1153

	if ((status == 0) || (status == -ECONNREFUSED)) {
1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166
		if (!ep->tried_with_mpa_v1) {
			/* this means MPA_v2 is used */
			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 */
			event.private_data_len = ep->plen;
			event.private_data = ep->mpa_pkt +
				sizeof(struct mpa_message);
		}
1167
	}
1168 1169 1170

	PDBG("%s ep %p tid %u status %d\n", __func__, ep,
	     ep->hwtid, status);
1171
	set_bit(CONN_RPL_UPCALL, &ep->com.history);
1172 1173
	ep->com.cm_id->event_handler(ep->com.cm_id, &event);

1174 1175 1176 1177 1178 1179
	if (status < 0) {
		ep->com.cm_id->rem_ref(ep->com.cm_id);
		ep->com.cm_id = NULL;
	}
}

1180
static int connect_request_upcall(struct c4iw_ep *ep)
1181 1182
{
	struct iw_cm_event event;
1183
	int ret;
1184 1185 1186 1187

	PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
	memset(&event, 0, sizeof(event));
	event.event = IW_CM_EVENT_CONNECT_REQUEST;
1188 1189 1190 1191
	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));
1192
	event.provider_data = ep;
1193 1194 1195 1196 1197 1198 1199 1200 1201 1202
	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 */
1203 1204
		event.ord = cur_max_read_depth(ep->com.dev);
		event.ird = cur_max_read_depth(ep->com.dev);
1205 1206 1207
		event.private_data_len = ep->plen;
		event.private_data = ep->mpa_pkt + sizeof(struct mpa_message);
	}
1208 1209 1210 1211 1212
	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);
1213
	set_bit(CONNREQ_UPCALL, &ep->com.history);
1214
	c4iw_put_ep(&ep->parent_ep->com);
1215
	return ret;
1216 1217 1218 1219 1220 1221 1222 1223 1224
}

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;
1225 1226
	event.ird = ep->ird;
	event.ord = ep->ord;
1227 1228 1229
	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);
1230
		set_bit(ESTAB_UPCALL, &ep->com.history);
1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246
	}
}

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;
	}

1247 1248 1249 1250 1251 1252 1253 1254
	/*
	 * 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.
	 */
	if (ep->rcv_win > RCV_BUFSIZ_MASK * 1024)
		credits += ep->rcv_win - RCV_BUFSIZ_MASK * 1024;

1255 1256 1257 1258 1259
	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));
1260 1261 1262
	req->credit_dack = cpu_to_be32(credits | RX_FORCE_ACK(1) |
				       F_RX_DACK_CHANGE |
				       V_RX_DACK_MODE(dack_mode));
S
Steve Wise 已提交
1263
	set_wr_txq(skb, CPL_PRIORITY_ACK, ep->ctrlq_idx);
1264 1265 1266 1267
	c4iw_ofld_send(&ep->com.dev->rdev, skb);
	return credits;
}

1268 1269
#define RELAXED_IRD_NEGOTIATION 1

1270
static int process_mpa_reply(struct c4iw_ep *ep, struct sk_buff *skb)
1271 1272
{
	struct mpa_message *mpa;
1273
	struct mpa_v2_conn_params *mpa_v2_params;
1274
	u16 plen;
1275 1276
	u16 resp_ird, resp_ord;
	u8 rtr_mismatch = 0, insuff_ird = 0;
1277 1278 1279
	struct c4iw_qp_attributes attrs;
	enum c4iw_qp_attr_mask mask;
	int err;
1280
	int disconnect = 0;
1281 1282 1283 1284

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

	/*
S
Steve Wise 已提交
1285 1286 1287
	 * Stop mpa timer.  If it expired, then
	 * we ignore the MPA reply.  process_timeout()
	 * will abort the connection.
1288
	 */
S
Steve Wise 已提交
1289
	if (stop_ep_timer(ep))
1290
		return 0;
1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311

	/*
	 * If we get more than the supported amount of private data
	 * then we must fail this connection.
	 */
	if (ep->mpa_pkt_len + skb->len > sizeof(ep->mpa_pkt)) {
		err = -EINVAL;
		goto err;
	}

	/*
	 * copy the new data into our accumulation buffer.
	 */
	skb_copy_from_linear_data(skb, &(ep->mpa_pkt[ep->mpa_pkt_len]),
				  skb->len);
	ep->mpa_pkt_len += skb->len;

	/*
	 * if we don't even have the mpa message, then bail.
	 */
	if (ep->mpa_pkt_len < sizeof(*mpa))
1312
		return 0;
1313 1314 1315
	mpa = (struct mpa_message *) ep->mpa_pkt;

	/* Validate MPA header. */
1316 1317 1318
	if (mpa->revision > mpa_rev) {
		printk(KERN_ERR MOD "%s MPA version mismatch. Local = %d,"
		       " Received = %d\n", __func__, mpa_rev, mpa->revision);
1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351
		err = -EPROTO;
		goto err;
	}
	if (memcmp(mpa->key, MPA_KEY_REP, sizeof(mpa->key))) {
		err = -EPROTO;
		goto err;
	}

	plen = ntohs(mpa->private_data_size);

	/*
	 * Fail if there's too much private data.
	 */
	if (plen > MPA_MAX_PRIVATE_DATA) {
		err = -EPROTO;
		goto err;
	}

	/*
	 * If plen does not account for pkt size
	 */
	if (ep->mpa_pkt_len > (sizeof(*mpa) + plen)) {
		err = -EPROTO;
		goto err;
	}

	ep->plen = (u8) plen;

	/*
	 * If we don't have all the pdata yet, then bail.
	 * We'll continue process when more data arrives.
	 */
	if (ep->mpa_pkt_len < (sizeof(*mpa) + plen))
1352
		return 0;
1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363

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

	/*
	 * If we get here we have accumulated the entire mpa
	 * start reply message including private data. And
	 * the MPA header is valid.
	 */
1364
	__state_set(&ep->com, FPDU_MODE);
1365 1366 1367
	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;
1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380
	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;
1381 1382
			PDBG("%s responder ird %u ord %u ep ird %u ord %u\n",
			     __func__, resp_ird, resp_ord, ep->ird, ep->ord);
1383 1384 1385 1386 1387 1388

			/*
			 * This is a double-check. Ideally, below checks are
			 * not required since ird/ord stuff has been taken
			 * care of in c4iw_accept_cr
			 */
1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404
			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) {
1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425
				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;

1426
	PDBG("%s - crc_enabled=%d, recv_marker_enabled=%d, "
1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438
	     "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
	 */
1439
	if ((ep->mpa_attr.version == 2) && peer2peer &&
1440 1441 1442 1443
			(ep->mpa_attr.p2p_type != p2p_type)) {
		ep->mpa_attr.p2p_type = FW_RI_INIT_P2PTYPE_DISABLED;
		rtr_mismatch = 1;
	}
1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459

	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;
1460 1461 1462 1463 1464 1465 1466 1467 1468 1469

	/*
	 * 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;
1470
		attrs.send_term = 1;
1471
		err = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
1472
				C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
1473
		err = -ENOMEM;
1474
		disconnect = 1;
1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489
		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;
1490
		attrs.send_term = 1;
1491
		err = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
1492
				C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
1493
		err = -ENOMEM;
1494
		disconnect = 1;
1495 1496
		goto out;
	}
1497 1498
	goto out;
err:
1499
	__state_set(&ep->com, ABORTING);
1500
	send_abort(ep, skb, GFP_KERNEL);
1501 1502
out:
	connect_reply_upcall(ep, err);
1503
	return disconnect;
1504 1505 1506 1507 1508
}

static void process_mpa_request(struct c4iw_ep *ep, struct sk_buff *skb)
{
	struct mpa_message *mpa;
1509
	struct mpa_v2_conn_params *mpa_v2_params;
1510 1511 1512 1513 1514 1515 1516 1517 1518
	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.
	 */
	if (ep->mpa_pkt_len + skb->len > sizeof(ep->mpa_pkt)) {
S
Steve Wise 已提交
1519
		(void)stop_ep_timer(ep);
1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545
		abort_connection(ep, skb, GFP_KERNEL);
		return;
	}

	PDBG("%s enter (%s line %u)\n", __func__, __FILE__, __LINE__);

	/*
	 * Copy the new data into our accumulation buffer.
	 */
	skb_copy_from_linear_data(skb, &(ep->mpa_pkt[ep->mpa_pkt_len]),
				  skb->len);
	ep->mpa_pkt_len += skb->len;

	/*
	 * If we don't even have the mpa message, then bail.
	 * We'll continue process when more data arrives.
	 */
	if (ep->mpa_pkt_len < sizeof(*mpa))
		return;

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

	/*
	 * Validate MPA Header.
	 */
1546 1547 1548
	if (mpa->revision > mpa_rev) {
		printk(KERN_ERR MOD "%s MPA version mismatch. Local = %d,"
		       " Received = %d\n", __func__, mpa_rev, mpa->revision);
S
Steve Wise 已提交
1549
		(void)stop_ep_timer(ep);
1550 1551 1552 1553 1554
		abort_connection(ep, skb, GFP_KERNEL);
		return;
	}

	if (memcmp(mpa->key, MPA_KEY_REQ, sizeof(mpa->key))) {
S
Steve Wise 已提交
1555
		(void)stop_ep_timer(ep);
1556 1557 1558 1559 1560 1561 1562 1563 1564 1565
		abort_connection(ep, skb, GFP_KERNEL);
		return;
	}

	plen = ntohs(mpa->private_data_size);

	/*
	 * Fail if there's too much private data.
	 */
	if (plen > MPA_MAX_PRIVATE_DATA) {
S
Steve Wise 已提交
1566
		(void)stop_ep_timer(ep);
1567 1568 1569 1570 1571 1572 1573 1574
		abort_connection(ep, skb, GFP_KERNEL);
		return;
	}

	/*
	 * If plen does not account for pkt size
	 */
	if (ep->mpa_pkt_len > (sizeof(*mpa) + plen)) {
S
Steve Wise 已提交
1575
		(void)stop_ep_timer(ep);
1576 1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594
		abort_connection(ep, skb, GFP_KERNEL);
		return;
	}
	ep->plen = (u8) plen;

	/*
	 * If we don't have all the pdata yet, then bail.
	 */
	if (ep->mpa_pkt_len < (sizeof(*mpa) + plen))
		return;

	/*
	 * If we get here we have accumulated the entire mpa
	 * start reply message including private data.
	 */
	ep->mpa_attr.initiator = 0;
	ep->mpa_attr.crc_enabled = (mpa->flags & MPA_CRC) | crc_enabled ? 1 : 0;
	ep->mpa_attr.recv_marker_enabled = markers_enabled;
	ep->mpa_attr.xmit_marker_enabled = mpa->flags & MPA_MARKERS ? 1 : 0;
1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609
	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;
1610 1611
			PDBG("%s initiator ird %u ord %u\n", __func__, ep->ird,
			     ep->ord);
1612 1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 1627
			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;

1628 1629 1630 1631 1632 1633
	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);

S
Steve Wise 已提交
1634 1635 1636 1637 1638 1639 1640 1641 1642 1643 1644 1645 1646 1647
	/*
	 * If the endpoint timer already expired, then we ignore
	 * the start request.  process_timeout() will abort
	 * the connection.
	 */
	if (!stop_ep_timer(ep)) {
		__state_set(&ep->com, MPA_REQ_RCVD);

		/* drive upcall */
		mutex_lock(&ep->parent_ep->com.mutex);
		if (ep->parent_ep->com.state != DEAD) {
			if (connect_request_upcall(ep))
				abort_connection(ep, skb, GFP_KERNEL);
		} else {
1648
			abort_connection(ep, skb, GFP_KERNEL);
S
Steve Wise 已提交
1649 1650
		}
		mutex_unlock(&ep->parent_ep->com.mutex);
1651
	}
1652 1653 1654 1655 1656 1657 1658 1659 1660 1661
	return;
}

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;
1662
	__u8 status = hdr->status;
1663
	int disconnect = 0;
1664 1665

	ep = lookup_tid(t, tid);
1666 1667
	if (!ep)
		return 0;
1668 1669 1670
	PDBG("%s ep %p tid %u dlen %u\n", __func__, ep, ep->hwtid, dlen);
	skb_pull(skb, sizeof(*hdr));
	skb_trim(skb, dlen);
1671
	mutex_lock(&ep->com.mutex);
1672 1673 1674 1675

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

1676
	switch (ep->com.state) {
1677
	case MPA_REQ_SENT:
1678
		ep->rcv_seq += dlen;
1679
		disconnect = process_mpa_reply(ep, skb);
1680 1681
		break;
	case MPA_REQ_WAIT:
1682
		ep->rcv_seq += dlen;
1683 1684
		process_mpa_request(ep, skb);
		break;
1685 1686 1687
	case FPDU_MODE: {
		struct c4iw_qp_attributes attrs;
		BUG_ON(!ep->com.qp);
1688
		if (status)
1689
			pr_err("%s Unexpected streaming data." \
1690 1691
			       " qpid %u ep %p state %d tid %u status %d\n",
			       __func__, ep->com.qp->wq.sq.qid, ep,
1692
			       ep->com.state, ep->hwtid, status);
1693
		attrs.next_state = C4IW_QP_STATE_TERMINATE;
1694
		c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
1695 1696
			       C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
		disconnect = 1;
1697 1698
		break;
	}
1699 1700 1701
	default:
		break;
	}
1702
	mutex_unlock(&ep->com.mutex);
1703 1704
	if (disconnect)
		c4iw_ep_disconnect(ep, 0, GFP_KERNEL);
1705 1706 1707 1708 1709 1710 1711 1712 1713 1714 1715 1716
	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);
1717 1718 1719 1720
	if (!ep) {
		printk(KERN_WARNING MOD "Abort rpl to freed endpoint\n");
		return 0;
	}
1721
	PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1722
	mutex_lock(&ep->com.mutex);
1723 1724
	switch (ep->com.state) {
	case ABORTING:
1725
		c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
1726 1727 1728 1729 1730 1731 1732 1733
		__state_set(&ep->com, DEAD);
		release = 1;
		break;
	default:
		printk(KERN_ERR "%s ep %p state %d\n",
		     __func__, ep, ep->com.state);
		break;
	}
1734
	mutex_unlock(&ep->com.mutex);
1735 1736 1737 1738 1739 1740

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

1741 1742 1743 1744 1745 1746
static void send_fw_act_open_req(struct c4iw_ep *ep, unsigned int atid)
{
	struct sk_buff *skb;
	struct fw_ofld_connection_wr *req;
	unsigned int mtu_idx;
	int wscale;
1747
	struct sockaddr_in *sin;
1748
	int win;
1749 1750 1751 1752 1753

	skb = get_skb(NULL, sizeof(*req), GFP_KERNEL);
	req = (struct fw_ofld_connection_wr *)__skb_put(skb, sizeof(*req));
	memset(req, 0, sizeof(*req));
	req->op_compl = htonl(V_WR_OP(FW_OFLD_CONNECTION_WR));
1754
	req->len16_pkd = htonl(FW_WR_LEN16_V(DIV_ROUND_UP(sizeof(*req), 16)));
1755 1756
	req->le.filter = cpu_to_be32(cxgb4_select_ntuple(
				     ep->com.dev->rdev.lldi.ports[0],
1757
				     ep->l2t));
1758
	sin = (struct sockaddr_in *)&ep->com.mapped_local_addr;
1759 1760
	req->le.lport = sin->sin_port;
	req->le.u.ipv4.lip = sin->sin_addr.s_addr;
1761
	sin = (struct sockaddr_in *)&ep->com.mapped_remote_addr;
1762 1763
	req->le.pport = sin->sin_port;
	req->le.u.ipv4.pip = sin->sin_addr.s_addr;
1764 1765 1766 1767 1768
	req->tcb.t_state_to_astid =
			htonl(V_FW_OFLD_CONNECTION_WR_T_STATE(TCP_SYN_SENT) |
			V_FW_OFLD_CONNECTION_WR_ASTID(atid));
	req->tcb.cplrxdataack_cplpassacceptrpl =
			htons(F_FW_OFLD_CONNECTION_WR_CPLRXDATAACK);
1769
	req->tcb.tx_max = (__force __be32) jiffies;
1770
	req->tcb.rcv_adv = htons(1);
1771
	best_mtu(ep->com.dev->rdev.lldi.mtus, ep->mtu, &mtu_idx,
1772 1773
		 enable_tcp_timestamps,
		 (AF_INET == ep->com.remote_addr.ss_family) ? 0 : 1);
1774
	wscale = compute_wscale(rcv_win);
1775 1776 1777 1778 1779 1780 1781 1782 1783

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

1784
	req->tcb.opt0 = (__force __be64) (TCAM_BYPASS(1) |
1785 1786 1787 1788 1789 1790 1791 1792 1793 1794
		(nocong ? NO_CONG(1) : 0) |
		KEEP_ALIVE(1) |
		DELACK(1) |
		WND_SCALE(wscale) |
		MSS_IDX(mtu_idx) |
		L2T_IDX(ep->l2t->idx) |
		TX_CHAN(ep->tx_chan) |
		SMAC_SEL(ep->smac_idx) |
		DSCP(ep->tos) |
		ULP_MODE(ULP_MODE_TCPDDP) |
1795
		RCV_BUFSIZ(win));
1796
	req->tcb.opt2 = (__force __be32) (PACE(1) |
1797 1798 1799
		TX_QUEUE(ep->com.dev->rdev.lldi.tx_modq[ep->tx_chan]) |
		RX_CHANNEL(0) |
		CCTRL_ECN(enable_ecn) |
1800
		RSS_QUEUE_VALID | RSS_QUEUE(ep->rss_qid));
1801
	if (enable_tcp_timestamps)
1802
		req->tcb.opt2 |= (__force __be32) TSTAMPS_EN(1);
1803
	if (enable_tcp_sack)
1804
		req->tcb.opt2 |= (__force __be32) SACK_EN(1);
1805
	if (wscale && enable_tcp_window_scaling)
1806 1807 1808
		req->tcb.opt2 |= (__force __be32) WND_SCALE_EN(1);
	req->tcb.opt0 = cpu_to_be64((__force u64) req->tcb.opt0);
	req->tcb.opt2 = cpu_to_be32((__force u32) req->tcb.opt2);
1809 1810
	set_wr_txq(skb, CPL_PRIORITY_CONTROL, ep->ctrlq_idx);
	set_bit(ACT_OFLD_CONN, &ep->com.history);
1811 1812 1813
	c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
}

1814 1815 1816 1817 1818 1819 1820 1821 1822
/*
 * 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;
}

1823 1824 1825 1826 1827 1828 1829 1830 1831
/* 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;
}

1832 1833 1834 1835 1836 1837 1838 1839 1840 1841 1842 1843 1844 1845
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";
	}
}

1846 1847 1848 1849 1850 1851 1852
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);
}

1853 1854
#define ACT_OPEN_RETRY_COUNT 2

1855 1856 1857 1858 1859 1860 1861 1862 1863 1864 1865 1866 1867 1868 1869 1870 1871 1872 1873 1874 1875 1876 1877 1878 1879 1880 1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900
static int import_ep(struct c4iw_ep *ep, int iptype, __u8 *peer_ip,
		     struct dst_entry *dst, struct c4iw_dev *cdev,
		     bool clear_mpa_v1)
{
	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,
					n, pdev, 0);
		if (!ep->l2t)
			goto out;
		ep->mtu = pdev->mtu;
		ep->tx_chan = cxgb4_port_chan(pdev);
		ep->smac_idx = (cxgb4_port_viid(pdev) & 0x7F) << 1;
		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];
1901
		set_tcp_window(ep, (struct port_info *)netdev_priv(pdev));
1902 1903 1904 1905 1906 1907 1908 1909
		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
1910 1911
		ep->tx_chan = cxgb4_port_chan(pdev);
		ep->smac_idx = (cxgb4_port_viid(pdev) & 0x7F) << 1;
1912 1913
		step = cdev->rdev.lldi.ntxq /
			cdev->rdev.lldi.nchan;
S
Steve Wise 已提交
1914 1915
		ep->txq_idx = cxgb4_port_idx(pdev) * step;
		ep->ctrlq_idx = cxgb4_port_idx(pdev);
1916 1917 1918
		step = cdev->rdev.lldi.nrxq /
			cdev->rdev.lldi.nchan;
		ep->rss_qid = cdev->rdev.lldi.rxq_ids[
S
Steve Wise 已提交
1919
			cxgb4_port_idx(pdev) * step];
1920
		set_tcp_window(ep, (struct port_info *)netdev_priv(pdev));
1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 1935

		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;
}

1936 1937 1938
static int c4iw_reconnect(struct c4iw_ep *ep)
{
	int err = 0;
1939 1940 1941 1942
	struct sockaddr_in *laddr = (struct sockaddr_in *)
				    &ep->com.cm_id->local_addr;
	struct sockaddr_in *raddr = (struct sockaddr_in *)
				    &ep->com.cm_id->remote_addr;
1943 1944 1945 1946 1947 1948
	struct sockaddr_in6 *laddr6 = (struct sockaddr_in6 *)
				      &ep->com.cm_id->local_addr;
	struct sockaddr_in6 *raddr6 = (struct sockaddr_in6 *)
				      &ep->com.cm_id->remote_addr;
	int iptype;
	__u8 *ra;
1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964

	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 */
1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979
	if (ep->com.cm_id->local_addr.ss_family == AF_INET) {
		ep->dst = find_route(ep->com.dev, laddr->sin_addr.s_addr,
				     raddr->sin_addr.s_addr, laddr->sin_port,
				     raddr->sin_port, 0);
		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) {
1980 1981 1982 1983
		pr_err("%s - cannot find route.\n", __func__);
		err = -EHOSTUNREACH;
		goto fail3;
	}
1984 1985
	err = import_ep(ep, iptype, ra, ep->dst, ep->com.dev, false);
	if (err) {
1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020
		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);
	ep->tos = 0;

	/* 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;
}

2021 2022 2023 2024 2025 2026 2027 2028
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);
	unsigned int atid = GET_TID_TID(GET_AOPEN_ATID(
					ntohl(rpl->atid_status)));
	struct tid_info *t = dev->rdev.lldi.tids;
	int status = GET_AOPEN_STATUS(ntohl(rpl->atid_status));
2029 2030 2031 2032
	struct sockaddr_in *la;
	struct sockaddr_in *ra;
	struct sockaddr_in6 *la6;
	struct sockaddr_in6 *ra6;
2033 2034

	ep = lookup_atid(t, atid);
2035 2036 2037 2038
	la = (struct sockaddr_in *)&ep->com.mapped_local_addr;
	ra = (struct sockaddr_in *)&ep->com.mapped_remote_addr;
	la6 = (struct sockaddr_in6 *)&ep->com.mapped_local_addr;
	ra6 = (struct sockaddr_in6 *)&ep->com.mapped_remote_addr;
2039 2040 2041 2042

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

2043
	if (is_neg_adv(status)) {
2044 2045 2046
		dev_warn(&dev->rdev.lldi.pdev->dev,
			 "Connection problems for atid %u status %u (%s)\n",
			 atid, status, neg_adv_str(status));
2047 2048 2049
		return 0;
	}

2050 2051
	set_bit(ACT_OPEN_RPL, &ep->com.history);

2052 2053 2054 2055 2056 2057 2058
	/*
	 * Log interesting failures.
	 */
	switch (status) {
	case CPL_ERR_CONN_RESET:
	case CPL_ERR_CONN_TIMEDOUT:
		break;
2059
	case CPL_ERR_TCAM_FULL:
2060
		mutex_lock(&dev->rdev.stats.lock);
2061
		dev->rdev.stats.tcam_full++;
2062 2063 2064
		mutex_unlock(&dev->rdev.stats.lock);
		if (ep->com.local_addr.ss_family == AF_INET &&
		    dev->rdev.lldi.enable_fw_ofld_conn) {
2065 2066 2067 2068 2069 2070 2071 2072 2073 2074 2075 2076 2077 2078 2079 2080 2081
			send_fw_act_open_req(ep,
					     GET_TID_TID(GET_AOPEN_ATID(
					     ntohl(rpl->atid_status))));
			return 0;
		}
		break;
	case CPL_ERR_CONN_EXIST:
		if (ep->retry_count++ < ACT_OPEN_RETRY_COUNT) {
			set_bit(ACT_RETRY_INUSE, &ep->com.history);
			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;
		}
2082
		break;
2083
	default:
2084 2085 2086 2087 2088 2089 2090 2091 2092 2093 2094
		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));
		}
2095 2096 2097
		break;
	}

2098 2099 2100 2101 2102 2103
	connect_reply_upcall(ep, status2errno(status));
	state_set(&ep->com, DEAD);

	if (status && act_open_has_tid(status))
		cxgb4_remove_tid(ep->com.dev->rdev.lldi.tids, 0, GET_TID(rpl));

2104
	remove_handle(ep->com.dev, &ep->com.dev->atid_idr, atid);
2105 2106 2107 2108 2109 2110 2111 2112 2113 2114 2115 2116 2117 2118 2119 2120
	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) {
2121 2122
		PDBG("%s stid %d lookup failure!\n", __func__, stid);
		goto out;
2123 2124 2125
	}
	PDBG("%s ep %p status %d error %d\n", __func__, ep,
	     rpl->status, status2errno(rpl->status));
2126
	c4iw_wake_up(&ep->com.wr_wait, status2errno(rpl->status));
2127

2128
out:
2129 2130 2131 2132 2133 2134 2135 2136 2137 2138 2139
	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);
2140
	c4iw_wake_up(&ep->com.wr_wait, status2errno(rpl->status));
2141 2142 2143
	return 0;
}

2144
static void accept_cr(struct c4iw_ep *ep, struct sk_buff *skb,
2145 2146 2147 2148 2149 2150 2151
		      struct cpl_pass_accept_req *req)
{
	struct cpl_pass_accept_rpl *rpl;
	unsigned int mtu_idx;
	u64 opt0;
	u32 opt2;
	int wscale;
2152
	struct cpl_t5_pass_accept_rpl *rpl5 = NULL;
2153
	int win;
2154 2155 2156

	PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
	BUG_ON(skb_cloned(skb));
2157

2158
	skb_get(skb);
2159 2160 2161 2162 2163 2164 2165 2166 2167 2168 2169 2170 2171
	rpl = cplhdr(skb);
	if (is_t5(ep->com.dev->rdev.lldi.adapter_type)) {
		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,
2172 2173
		 enable_tcp_timestamps && req->tcpopt.tstamp,
		 (AF_INET == ep->com.remote_addr.ss_family) ? 0 : 1);
2174
	wscale = compute_wscale(rcv_win);
2175 2176 2177 2178 2179 2180 2181 2182

	/*
	 * Specify the largest window that will fit in opt0. The
	 * remainder will be specified in the rx_data_ack.
	 */
	win = ep->rcv_win >> 10;
	if (win > RCV_BUFSIZ_MASK)
		win = RCV_BUFSIZ_MASK;
2183 2184
	opt0 = (nocong ? NO_CONG(1) : 0) |
	       KEEP_ALIVE(1) |
2185
	       DELACK(1) |
2186 2187 2188 2189 2190
	       WND_SCALE(wscale) |
	       MSS_IDX(mtu_idx) |
	       L2T_IDX(ep->l2t->idx) |
	       TX_CHAN(ep->tx_chan) |
	       SMAC_SEL(ep->smac_idx) |
2191
	       DSCP(ep->tos >> 2) |
S
Steve Wise 已提交
2192
	       ULP_MODE(ULP_MODE_TCPDDP) |
2193
	       RCV_BUFSIZ(win);
2194 2195 2196 2197 2198 2199 2200 2201 2202
	opt2 = RX_CHANNEL(0) |
	       RSS_QUEUE_VALID | RSS_QUEUE(ep->rss_qid);

	if (enable_tcp_timestamps && req->tcpopt.tstamp)
		opt2 |= TSTAMPS_EN(1);
	if (enable_tcp_sack && req->tcpopt.sack)
		opt2 |= SACK_EN(1);
	if (wscale && enable_tcp_window_scaling)
		opt2 |= WND_SCALE_EN(1);
2203 2204 2205 2206 2207 2208 2209 2210 2211
	if (enable_ecn) {
		const struct tcphdr *tcph;
		u32 hlen = ntohl(req->hdr_len);

		tcph = (const void *)(req + 1) + G_ETH_HDR_LEN(hlen) +
			G_IP_HDR_LEN(hlen);
		if (tcph->ece && tcph->cwr)
			opt2 |= CCTRL_ECN(1);
	}
2212
	if (is_t5(ep->com.dev->rdev.lldi.adapter_type)) {
2213
		u32 isn = (prandom_u32() & ~7UL) - 1;
2214 2215
		opt2 |= T5_OPT_2_VALID;
		opt2 |= V_CONG_CNTRL(CONG_ALG_TAHOE);
2216 2217 2218 2219 2220 2221 2222
		opt2 |= CONG_CNTRL_VALID; /* OPT_2_ISS for T5 */
		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));
2223
	}
2224 2225 2226

	rpl->opt0 = cpu_to_be64(opt0);
	rpl->opt2 = cpu_to_be32(opt2);
S
Steve Wise 已提交
2227
	set_wr_txq(skb, CPL_PRIORITY_SETUP, ep->ctrlq_idx);
2228
	t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
2229 2230 2231 2232 2233
	c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);

	return;
}

2234
static void reject_cr(struct c4iw_dev *dev, u32 hwtid, struct sk_buff *skb)
2235
{
2236
	PDBG("%s c4iw_dev %p tid %u\n", __func__, dev, hwtid);
2237 2238 2239 2240 2241 2242
	BUG_ON(skb_cloned(skb));
	skb_trim(skb, sizeof(struct cpl_tid_release));
	release_tid(&dev->rdev, hwtid, skb);
	return;
}

2243 2244
static void get_4tuple(struct cpl_pass_accept_req *req, int *iptype,
		       __u8 *local_ip, __u8 *peer_ip,
2245 2246 2247 2248 2249
		       __be16 *local_port, __be16 *peer_port)
{
	int eth_len = G_ETH_HDR_LEN(be32_to_cpu(req->hdr_len));
	int ip_len = G_IP_HDR_LEN(be32_to_cpu(req->hdr_len));
	struct iphdr *ip = (struct iphdr *)((u8 *)(req + 1) + eth_len);
2250
	struct ipv6hdr *ip6 = (struct ipv6hdr *)((u8 *)(req + 1) + eth_len);
2251 2252 2253
	struct tcphdr *tcp = (struct tcphdr *)
			     ((u8 *)(req + 1) + eth_len + ip_len);

2254 2255 2256 2257 2258 2259 2260 2261 2262 2263 2264 2265 2266 2267 2268
	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);
	}
2269 2270 2271 2272 2273 2274 2275 2276
	*peer_port = tcp->source;
	*local_port = tcp->dest;

	return;
}

static int pass_accept_req(struct c4iw_dev *dev, struct sk_buff *skb)
{
2277
	struct c4iw_ep *child_ep = NULL, *parent_ep;
2278 2279 2280 2281 2282
	struct cpl_pass_accept_req *req = cplhdr(skb);
	unsigned int stid = GET_POPEN_TID(ntohl(req->tos_stid));
	struct tid_info *t = dev->rdev.lldi.tids;
	unsigned int hwtid = GET_TID(req);
	struct dst_entry *dst;
2283
	__u8 local_ip[16], peer_ip[16];
2284
	__be16 local_port, peer_port;
2285
	int err;
2286
	u16 peer_mss = ntohs(req->tcpopt.mss);
2287
	int iptype;
2288
	unsigned short hdrs;
2289 2290

	parent_ep = lookup_stid(t, stid);
2291 2292 2293 2294 2295
	if (!parent_ep) {
		PDBG("%s connect request on invalid stid %d\n", __func__, stid);
		goto reject;
	}

2296 2297 2298 2299 2300 2301
	if (state_read(&parent_ep->com) != LISTEN) {
		printk(KERN_ERR "%s - listening ep not in LISTEN\n",
		       __func__);
		goto reject;
	}

2302 2303
	get_4tuple(req, &iptype, local_ip, peer_ip, &local_port, &peer_port);

2304
	/* Find output route */
2305 2306 2307 2308 2309 2310 2311 2312 2313 2314 2315 2316 2317 2318 2319 2320 2321 2322 2323
	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,
				 GET_POPEN_TOS(ntohl(req->tos_stid)));
	} 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,
				  PASS_OPEN_TOS(ntohl(req->tos_stid)),
				  ((struct sockaddr_in6 *)
				  &parent_ep->com.local_addr)->sin6_scope_id);
	}
	if (!dst) {
2324 2325 2326 2327
		printk(KERN_ERR MOD "%s - failed to find dst entry!\n",
		       __func__);
		goto reject;
	}
2328 2329 2330 2331

	child_ep = alloc_ep(sizeof(*child_ep), GFP_KERNEL);
	if (!child_ep) {
		printk(KERN_ERR MOD "%s - failed to allocate ep entry!\n",
2332 2333 2334 2335 2336
		       __func__);
		dst_release(dst);
		goto reject;
	}

2337
	err = import_ep(child_ep, iptype, peer_ip, dst, dev, false);
2338 2339
	if (err) {
		printk(KERN_ERR MOD "%s - failed to allocate l2t entry!\n",
2340 2341
		       __func__);
		dst_release(dst);
2342
		kfree(child_ep);
2343 2344
		goto reject;
	}
2345

2346 2347 2348 2349
	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;
2350

2351 2352 2353
	state_set(&child_ep->com, CONNECTING);
	child_ep->com.dev = dev;
	child_ep->com.cm_id = NULL;
2354 2355 2356 2357 2358 2359 2360 2361 2362 2363 2364 2365 2366 2367 2368 2369 2370 2371 2372 2373 2374
	if (iptype == 4) {
		struct sockaddr_in *sin = (struct sockaddr_in *)
			&child_ep->com.local_addr;
		sin->sin_family = PF_INET;
		sin->sin_port = local_port;
		sin->sin_addr.s_addr = *(__be32 *)local_ip;
		sin = (struct sockaddr_in *)&child_ep->com.remote_addr;
		sin->sin_family = PF_INET;
		sin->sin_port = peer_port;
		sin->sin_addr.s_addr = *(__be32 *)peer_ip;
	} else {
		struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)
			&child_ep->com.local_addr;
		sin6->sin6_family = PF_INET6;
		sin6->sin6_port = local_port;
		memcpy(sin6->sin6_addr.s6_addr, local_ip, 16);
		sin6 = (struct sockaddr_in6 *)&child_ep->com.remote_addr;
		sin6->sin6_family = PF_INET6;
		sin6->sin6_port = peer_port;
		memcpy(sin6->sin6_addr.s6_addr, peer_ip, 16);
	}
2375 2376 2377 2378 2379 2380 2381
	c4iw_get_ep(&parent_ep->com);
	child_ep->parent_ep = parent_ep;
	child_ep->tos = GET_POPEN_TOS(ntohl(req->tos_stid));
	child_ep->dst = dst;
	child_ep->hwtid = hwtid;

	PDBG("%s tx_chan %u smac_idx %u rss_qid %u\n", __func__,
2382
	     child_ep->tx_chan, child_ep->smac_idx, child_ep->rss_qid);
2383 2384 2385

	init_timer(&child_ep->timer);
	cxgb4_insert_tid(t, child_ep, hwtid);
2386
	insert_handle(dev, &dev->hwtid_idr, child_ep, child_ep->hwtid);
2387
	accept_cr(child_ep, skb, req);
2388
	set_bit(PASS_ACCEPT_REQ, &child_ep->com.history);
2389 2390
	goto out;
reject:
2391
	reject_cr(dev, hwtid, skb);
2392 2393 2394 2395 2396 2397 2398 2399 2400 2401 2402 2403 2404 2405 2406 2407
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);

	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);

2408 2409 2410
	PDBG("%s ep %p hwtid %u tcp_opt 0x%02x\n", __func__, ep, tid,
	     ntohs(req->tcp_opt));

2411 2412 2413 2414 2415 2416
	set_emss(ep, ntohs(req->tcp_opt));

	dst_confirm(ep->dst);
	state_set(&ep->com, MPA_REQ_WAIT);
	start_ep_timer(ep);
	send_flowc(ep, skb);
2417
	set_bit(PASS_ESTAB, &ep->com.history);
2418 2419 2420 2421 2422 2423 2424 2425 2426 2427 2428 2429 2430

	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
2431
	int ret;
2432 2433 2434 2435 2436

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

2437
	set_bit(PEER_CLOSE, &ep->com.history);
2438
	mutex_lock(&ep->com.mutex);
2439 2440 2441 2442 2443 2444 2445 2446 2447 2448 2449 2450 2451 2452 2453 2454 2455 2456
	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);
2457
		c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
2458 2459 2460 2461
		break;
	case MPA_REP_SENT:
		__state_set(&ep->com, CLOSING);
		PDBG("waking up ep %p tid %u\n", ep, ep->hwtid);
2462
		c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
2463 2464
		break;
	case FPDU_MODE:
2465
		start_ep_timer(ep);
2466
		__state_set(&ep->com, CLOSING);
2467
		attrs.next_state = C4IW_QP_STATE_CLOSING;
S
Steve Wise 已提交
2468
		ret = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
2469
				       C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
S
Steve Wise 已提交
2470 2471 2472 2473
		if (ret != -ECONNRESET) {
			peer_close_upcall(ep);
			disconnect = 1;
		}
2474 2475 2476 2477 2478 2479 2480 2481 2482
		break;
	case ABORTING:
		disconnect = 0;
		break;
	case CLOSING:
		__state_set(&ep->com, MORIBUND);
		disconnect = 0;
		break;
	case MORIBUND:
S
Steve Wise 已提交
2483
		(void)stop_ep_timer(ep);
2484 2485 2486 2487 2488
		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);
		}
2489
		close_complete_upcall(ep, 0);
2490 2491 2492 2493 2494 2495 2496 2497 2498 2499
		__state_set(&ep->com, DEAD);
		release = 1;
		disconnect = 0;
		break;
	case DEAD:
		disconnect = 0;
		break;
	default:
		BUG_ON(1);
	}
2500
	mutex_unlock(&ep->com.mutex);
2501 2502 2503 2504 2505 2506 2507 2508 2509 2510 2511 2512 2513 2514 2515 2516 2517 2518 2519 2520
	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);
2521
	if (is_neg_adv(req->status)) {
2522 2523 2524
		dev_warn(&dev->rdev.lldi.pdev->dev,
			 "Negative advice on abort - tid %u status %d (%s)\n",
			 ep->hwtid, req->status, neg_adv_str(req->status));
2525 2526 2527 2528
		return 0;
	}
	PDBG("%s ep %p tid %u state %u\n", __func__, ep, ep->hwtid,
	     ep->com.state);
2529
	set_bit(PEER_ABORT, &ep->com.history);
2530 2531 2532

	/*
	 * Wake up any threads in rdma_init() or rdma_fini().
2533 2534
	 * However, this is not needed if com state is just
	 * MPA_REQ_SENT
2535
	 */
2536 2537
	if (ep->com.state != MPA_REQ_SENT)
		c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
2538 2539

	mutex_lock(&ep->com.mutex);
2540 2541 2542 2543
	switch (ep->com.state) {
	case CONNECTING:
		break;
	case MPA_REQ_WAIT:
S
Steve Wise 已提交
2544
		(void)stop_ep_timer(ep);
2545 2546
		break;
	case MPA_REQ_SENT:
S
Steve Wise 已提交
2547
		(void)stop_ep_timer(ep);
2548
		if (mpa_rev == 1 || (mpa_rev == 2 && ep->tried_with_mpa_v1))
2549 2550 2551 2552 2553 2554 2555 2556 2557 2558 2559 2560 2561 2562
			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;
		}
2563 2564 2565 2566 2567 2568 2569
		break;
	case MPA_REP_SENT:
		break;
	case MPA_REQ_RCVD:
		break;
	case MORIBUND:
	case CLOSING:
2570
		stop_ep_timer(ep);
2571 2572 2573 2574 2575 2576 2577 2578 2579 2580 2581 2582 2583 2584 2585 2586 2587 2588
		/*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__);
2589
		mutex_unlock(&ep->com.mutex);
2590 2591 2592 2593 2594 2595 2596 2597
		return 0;
	default:
		BUG_ON(1);
		break;
	}
	dst_confirm(ep->dst);
	if (ep->com.state != ABORTING) {
		__state_set(&ep->com, DEAD);
2598 2599 2600
		/* we don't release if we want to retry with mpa_v1 */
		if (!ep->retry_with_mpa_v1)
			release = 1;
2601
	}
2602
	mutex_unlock(&ep->com.mutex);
2603 2604 2605 2606 2607 2608 2609 2610 2611 2612 2613 2614 2615 2616 2617 2618 2619

	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);
2620 2621
	else if (ep->retry_with_mpa_v1) {
		remove_handle(ep->com.dev, &ep->com.dev->hwtid_idr, ep->hwtid);
2622 2623 2624 2625 2626 2627
		cxgb4_remove_tid(ep->com.dev->rdev.lldi.tids, 0, ep->hwtid);
		dst_release(ep->dst);
		cxgb4_l2t_release(ep->l2t);
		c4iw_reconnect(ep);
	}

2628 2629 2630 2631 2632 2633 2634 2635 2636 2637 2638 2639 2640 2641 2642 2643 2644 2645
	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 */
2646
	mutex_lock(&ep->com.mutex);
2647 2648 2649 2650 2651
	switch (ep->com.state) {
	case CLOSING:
		__state_set(&ep->com, MORIBUND);
		break;
	case MORIBUND:
S
Steve Wise 已提交
2652
		(void)stop_ep_timer(ep);
2653 2654 2655 2656 2657 2658 2659
		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);
		}
2660
		close_complete_upcall(ep, 0);
2661 2662 2663 2664 2665 2666 2667 2668 2669 2670
		__state_set(&ep->com, DEAD);
		release = 1;
		break;
	case ABORTING:
	case DEAD:
		break;
	default:
		BUG_ON(1);
		break;
	}
2671
	mutex_unlock(&ep->com.mutex);
2672 2673 2674 2675 2676 2677 2678
	if (release)
		release_ep_resources(ep);
	return 0;
}

static int terminate(struct c4iw_dev *dev, struct sk_buff *skb)
{
2679
	struct cpl_rdma_terminate *rpl = cplhdr(skb);
2680
	struct tid_info *t = dev->rdev.lldi.tids;
2681 2682 2683
	unsigned int tid = GET_TID(rpl);
	struct c4iw_ep *ep;
	struct c4iw_qp_attributes attrs;
2684 2685

	ep = lookup_tid(t, tid);
2686
	BUG_ON(!ep);
2687

2688
	if (ep && ep->com.qp) {
2689 2690 2691 2692 2693 2694
		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
2695
		printk(KERN_WARNING MOD "TERM received tid %u no ep/qp\n", tid);
2696 2697 2698 2699 2700 2701 2702 2703 2704 2705 2706 2707 2708 2709 2710 2711 2712 2713 2714 2715 2716

	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) {
2717 2718
		PDBG("%s 0 credit ack ep %p tid %u state %u\n",
		     __func__, ep, ep->hwtid, state_read(&ep->com));
2719 2720 2721 2722 2723 2724 2725 2726 2727 2728 2729 2730 2731 2732 2733 2734
		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;
	}
	return 0;
}

int c4iw_reject_cr(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
{
2735 2736
	int err = 0;
	int disconnect = 0;
2737 2738 2739
	struct c4iw_ep *ep = to_ep(cm_id);
	PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);

2740 2741 2742
	mutex_lock(&ep->com.mutex);
	if (ep->com.state == DEAD) {
		mutex_unlock(&ep->com.mutex);
2743 2744 2745
		c4iw_put_ep(&ep->com);
		return -ECONNRESET;
	}
2746
	set_bit(ULP_REJECT, &ep->com.history);
2747
	BUG_ON(ep->com.state != MPA_REQ_RCVD);
2748 2749 2750 2751
	if (mpa_rev == 0)
		abort_connection(ep, NULL, GFP_KERNEL);
	else {
		err = send_mpa_reject(ep, pdata, pdata_len);
2752
		disconnect = 1;
2753
	}
2754 2755 2756
	mutex_unlock(&ep->com.mutex);
	if (disconnect)
		err = c4iw_ep_disconnect(ep, 0, GFP_KERNEL);
2757 2758 2759 2760 2761 2762 2763 2764 2765 2766 2767 2768 2769 2770
	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);

	PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
2771 2772 2773

	mutex_lock(&ep->com.mutex);
	if (ep->com.state == DEAD) {
2774 2775 2776 2777
		err = -ECONNRESET;
		goto err;
	}

2778
	BUG_ON(ep->com.state != MPA_REQ_RCVD);
2779 2780
	BUG_ON(!qp);

2781
	set_bit(ULP_ACCEPT, &ep->com.history);
2782 2783
	if ((conn_param->ord > cur_max_read_depth(ep->com.dev)) ||
	    (conn_param->ird > cur_max_read_depth(ep->com.dev))) {
2784 2785 2786 2787 2788
		abort_connection(ep, NULL, GFP_KERNEL);
		err = -EINVAL;
		goto err;
	}

2789 2790
	if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) {
		if (conn_param->ord > ep->ird) {
2791 2792 2793 2794 2795 2796 2797 2798 2799 2800 2801
			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);
				abort_connection(ep, NULL, GFP_KERNEL);
				err = -ENOMEM;
				goto err;
			}
2802
		}
2803 2804 2805 2806 2807
		if (conn_param->ird < ep->ord) {
			if (RELAXED_IRD_NEGOTIATION &&
			    ep->ord <= h->rdev.lldi.max_ordird_qp) {
				conn_param->ird = ep->ord;
			} else {
2808 2809 2810 2811 2812 2813
				abort_connection(ep, NULL, GFP_KERNEL);
				err = -ENOMEM;
				goto err;
			}
		}
	}
2814 2815 2816
	ep->ird = conn_param->ird;
	ep->ord = conn_param->ord;

2817
	if (ep->mpa_attr.version == 1) {
2818 2819
		if (peer2peer && ep->ird == 0)
			ep->ird = 1;
2820 2821 2822 2823 2824 2825
	} else {
		if (peer2peer &&
		    (ep->mpa_attr.p2p_type != FW_RI_INIT_P2PTYPE_DISABLED) &&
		    (p2p_type == FW_RI_INIT_P2PTYPE_READ_REQ) && ep->ord == 0)
			ep->ird = 1;
	}
2826 2827 2828

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

2829 2830 2831
	cm_id->add_ref(cm_id);
	ep->com.cm_id = cm_id;
	ep->com.qp = qp;
2832
	ref_qp(ep);
2833

2834 2835 2836 2837 2838 2839 2840 2841 2842 2843 2844 2845 2846 2847 2848 2849 2850 2851 2852 2853 2854 2855 2856
	/* 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)
		goto err1;
	err = send_mpa_reply(ep, conn_param->private_data,
			     conn_param->private_data_len);
	if (err)
		goto err1;

2857
	__state_set(&ep->com, FPDU_MODE);
2858
	established_upcall(ep);
2859
	mutex_unlock(&ep->com.mutex);
2860 2861 2862 2863
	c4iw_put_ep(&ep->com);
	return 0;
err1:
	ep->com.cm_id = NULL;
2864
	abort_connection(ep, NULL, GFP_KERNEL);
2865 2866
	cm_id->rem_ref(cm_id);
err:
2867
	mutex_unlock(&ep->com.mutex);
2868 2869 2870 2871
	c4iw_put_ep(&ep->com);
	return err;
}

2872 2873 2874 2875 2876 2877 2878 2879 2880 2881 2882 2883 2884 2885 2886 2887 2888 2889 2890 2891 2892 2893 2894 2895 2896 2897 2898 2899 2900 2901 2902 2903 2904 2905 2906 2907 2908 2909 2910 2911 2912 2913 2914 2915 2916 2917 2918 2919 2920 2921 2922 2923 2924 2925 2926 2927 2928 2929 2930 2931 2932
static int pick_local_ipaddrs(struct c4iw_dev *dev, struct iw_cm_id *cm_id)
{
	struct in_device *ind;
	int found = 0;
	struct sockaddr_in *laddr = (struct sockaddr_in *)&cm_id->local_addr;
	struct sockaddr_in *raddr = (struct sockaddr_in *)&cm_id->remote_addr;

	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);
	struct sockaddr_in6 *la6 = (struct sockaddr_in6 *)&cm_id->local_addr;
	struct sockaddr_in6 *ra6 = (struct sockaddr_in6 *)&cm_id->remote_addr;

	if (get_lladdr(dev->rdev.lldi.ports[0], &addr, IFA_F_TENTATIVE)) {
		memcpy(la6->sin6_addr.s6_addr, &addr, 16);
		memcpy(ra6->sin6_addr.s6_addr, &addr, 16);
		return 0;
	}
	return -EADDRNOTAVAIL;
}

2933 2934 2935 2936
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;
2937
	int err = 0;
2938 2939 2940 2941 2942 2943
	struct sockaddr_in *laddr;
	struct sockaddr_in *raddr;
	struct sockaddr_in6 *laddr6;
	struct sockaddr_in6 *raddr6;
	struct iwpm_dev_data pm_reg_msg;
	struct iwpm_sa_data pm_msg;
2944 2945
	__u8 *ra;
	int iptype;
2946
	int iwpm_err = 0;
2947

2948 2949
	if ((conn_param->ord > cur_max_read_depth(dev)) ||
	    (conn_param->ird > cur_max_read_depth(dev))) {
2950 2951 2952
		err = -EINVAL;
		goto out;
	}
2953 2954 2955 2956 2957 2958 2959 2960 2961 2962 2963 2964 2965 2966 2967 2968 2969 2970 2971 2972 2973
	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;

	cm_id->add_ref(cm_id);
	ep->com.dev = dev;
	ep->com.cm_id = cm_id;
	ep->com.qp = get_qhp(dev, conn_param->qpn);
2974 2975 2976
	if (!ep->com.qp) {
		PDBG("%s qpn 0x%x not found!\n", __func__, conn_param->qpn);
		err = -EINVAL;
2977
		goto fail1;
2978
	}
2979
	ref_qp(ep);
2980 2981 2982 2983 2984 2985 2986 2987 2988 2989
	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;
2990
		goto fail1;
2991
	}
2992
	insert_handle(dev, &dev->atid_idr, ep, ep->atid);
2993

2994 2995 2996 2997 2998 2999 3000 3001 3002 3003 3004 3005 3006 3007 3008 3009 3010 3011 3012 3013 3014 3015 3016 3017 3018 3019 3020 3021 3022 3023 3024 3025 3026 3027 3028 3029 3030 3031 3032 3033
	memcpy(&ep->com.local_addr, &cm_id->local_addr,
	       sizeof(ep->com.local_addr));
	memcpy(&ep->com.remote_addr, &cm_id->remote_addr,
	       sizeof(ep->com.remote_addr));

	/* No port mapper available, go with the specified peer information */
	memcpy(&ep->com.mapped_local_addr, &cm_id->local_addr,
	       sizeof(ep->com.mapped_local_addr));
	memcpy(&ep->com.mapped_remote_addr, &cm_id->remote_addr,
	       sizeof(ep->com.mapped_remote_addr));

	c4iw_form_reg_msg(dev, &pm_reg_msg);
	iwpm_err = iwpm_register_pid(&pm_reg_msg, RDMA_NL_C4IW);
	if (iwpm_err) {
		PDBG("%s: Port Mapper reg pid fail (err = %d).\n",
			__func__, iwpm_err);
	}
	if (iwpm_valid_pid() && !iwpm_err) {
		c4iw_form_pm_msg(ep, &pm_msg);
		iwpm_err = iwpm_add_and_query_mapping(&pm_msg, RDMA_NL_C4IW);
		if (iwpm_err)
			PDBG("%s: Port Mapper query fail (err = %d).\n",
				__func__, iwpm_err);
		else
			c4iw_record_pm_msg(ep, &pm_msg);
	}
	if (iwpm_create_mapinfo(&ep->com.local_addr,
				&ep->com.mapped_local_addr, RDMA_NL_C4IW)) {
		iwpm_remove_mapping(&ep->com.local_addr, RDMA_NL_C4IW);
		err = -ENOMEM;
		goto fail1;
	}
	print_addr(&ep->com, __func__, "add_query/create_mapinfo");
	set_bit(RELEASE_MAPINFO, &ep->com.flags);

	laddr = (struct sockaddr_in *)&ep->com.mapped_local_addr;
	raddr = (struct sockaddr_in *)&ep->com.mapped_remote_addr;
	laddr6 = (struct sockaddr_in6 *)&ep->com.mapped_local_addr;
	raddr6 = (struct sockaddr_in6 *) &ep->com.mapped_remote_addr;

3034 3035 3036
	if (cm_id->remote_addr.ss_family == AF_INET) {
		iptype = 4;
		ra = (__u8 *)&raddr->sin_addr;
3037

3038 3039 3040 3041 3042 3043
		/*
		 * 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)
3044
				goto fail1;
3045 3046 3047 3048 3049 3050 3051 3052 3053 3054 3055 3056 3057 3058 3059 3060 3061 3062 3063
		}

		/* 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,
				     raddr->sin_port, 0);
	} 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)
3064
				goto fail1;
3065 3066 3067 3068 3069 3070 3071 3072 3073 3074 3075 3076 3077
		}

		/* 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) {
3078 3079
		printk(KERN_ERR MOD "%s - cannot find route.\n", __func__);
		err = -EHOSTUNREACH;
3080
		goto fail2;
3081 3082
	}

3083
	err = import_ep(ep, iptype, ra, ep->dst, ep->com.dev, true);
3084
	if (err) {
3085
		printk(KERN_ERR MOD "%s - cannot alloc l2e.\n", __func__);
3086
		goto fail3;
3087 3088 3089 3090 3091 3092 3093 3094 3095 3096 3097 3098 3099 3100 3101 3102
	}

	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);
	ep->tos = 0;

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

	cxgb4_l2t_release(ep->l2t);
fail3:
3103 3104
	dst_release(ep->dst);
fail2:
3105
	remove_handle(ep->com.dev, &ep->com.dev->atid_idr, ep->atid);
3106
	cxgb4_free_atid(ep->com.dev->rdev.lldi.tids, ep->atid);
3107
fail1:
3108 3109 3110 3111 3112 3113
	cm_id->rem_ref(cm_id);
	c4iw_put_ep(&ep->com);
out:
	return err;
}

3114 3115 3116
static int create_server6(struct c4iw_dev *dev, struct c4iw_listen_ep *ep)
{
	int err;
3117 3118
	struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)
				    &ep->com.mapped_local_addr;
3119 3120 3121 3122 3123 3124 3125 3126 3127 3128 3129 3130 3131 3132 3133 3134 3135 3136 3137 3138

	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__);
	if (err)
		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));
	return err;
}

static int create_server4(struct c4iw_dev *dev, struct c4iw_listen_ep *ep)
{
	int err;
3139 3140
	struct sockaddr_in *sin = (struct sockaddr_in *)
				  &ep->com.mapped_local_addr;
3141 3142 3143 3144 3145 3146 3147 3148 3149 3150 3151 3152 3153 3154 3155 3156 3157 3158 3159 3160 3161 3162 3163 3164 3165 3166 3167 3168 3169

	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) {
				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__);
	}
	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;
}

3170 3171 3172 3173 3174
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;
3175 3176 3177
	struct iwpm_dev_data pm_reg_msg;
	struct iwpm_sa_data pm_msg;
	int iwpm_err = 0;
3178 3179 3180 3181 3182 3183 3184 3185 3186 3187 3188 3189 3190 3191

	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);
	cm_id->add_ref(cm_id);
	ep->com.cm_id = cm_id;
	ep->com.dev = dev;
	ep->backlog = backlog;
3192 3193
	memcpy(&ep->com.local_addr, &cm_id->local_addr,
	       sizeof(ep->com.local_addr));
3194 3195 3196 3197

	/*
	 * Allocate a server TID.
	 */
3198 3199
	if (dev->rdev.lldi.enable_fw_ofld_conn &&
	    ep->com.local_addr.ss_family == AF_INET)
3200 3201
		ep->stid = cxgb4_alloc_sftid(dev->rdev.lldi.tids,
					     cm_id->local_addr.ss_family, ep);
3202
	else
3203 3204
		ep->stid = cxgb4_alloc_stid(dev->rdev.lldi.tids,
					    cm_id->local_addr.ss_family, ep);
3205

3206
	if (ep->stid == -1) {
3207
		printk(KERN_ERR MOD "%s - cannot alloc stid.\n", __func__);
3208 3209 3210
		err = -ENOMEM;
		goto fail2;
	}
3211
	insert_handle(dev, &dev->stid_idr, ep, ep->stid);
3212 3213 3214 3215 3216 3217 3218 3219 3220 3221 3222 3223 3224 3225 3226 3227 3228 3229 3230 3231 3232 3233 3234 3235 3236 3237 3238 3239 3240 3241 3242

	/* No port mapper available, go with the specified info */
	memcpy(&ep->com.mapped_local_addr, &cm_id->local_addr,
	       sizeof(ep->com.mapped_local_addr));

	c4iw_form_reg_msg(dev, &pm_reg_msg);
	iwpm_err = iwpm_register_pid(&pm_reg_msg, RDMA_NL_C4IW);
	if (iwpm_err) {
		PDBG("%s: Port Mapper reg pid fail (err = %d).\n",
			__func__, iwpm_err);
	}
	if (iwpm_valid_pid() && !iwpm_err) {
		memcpy(&pm_msg.loc_addr, &ep->com.local_addr,
				sizeof(ep->com.local_addr));
		iwpm_err = iwpm_add_mapping(&pm_msg, RDMA_NL_C4IW);
		if (iwpm_err)
			PDBG("%s: Port Mapper query fail (err = %d).\n",
				__func__, iwpm_err);
		else
			memcpy(&ep->com.mapped_local_addr,
				&pm_msg.mapped_loc_addr,
				sizeof(ep->com.mapped_local_addr));
	}
	if (iwpm_create_mapinfo(&ep->com.local_addr,
				&ep->com.mapped_local_addr, RDMA_NL_C4IW)) {
		err = -ENOMEM;
		goto fail3;
	}
	print_addr(&ep->com, __func__, "add_mapping/create_mapinfo");

	set_bit(RELEASE_MAPINFO, &ep->com.flags);
3243
	state_set(&ep->com, LISTEN);
3244 3245 3246 3247
	if (ep->com.local_addr.ss_family == AF_INET)
		err = create_server4(dev, ep);
	else
		err = create_server6(dev, ep);
3248 3249 3250 3251
	if (!err) {
		cm_id->provider_data = ep;
		goto out;
	}
3252 3253

fail3:
3254 3255
	cxgb4_free_stid(ep->com.dev->rdev.lldi.tids, ep->stid,
			ep->com.local_addr.ss_family);
3256 3257 3258 3259 3260 3261 3262 3263 3264 3265 3266 3267 3268 3269 3270 3271 3272
fail2:
	cm_id->rem_ref(cm_id);
	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);
3273 3274
	if (ep->com.dev->rdev.lldi.enable_fw_ofld_conn &&
	    ep->com.local_addr.ss_family == AF_INET) {
3275 3276 3277 3278 3279
		err = cxgb4_remove_server_filter(
			ep->com.dev->rdev.lldi.ports[0], ep->stid,
			ep->com.dev->rdev.lldi.rxq_ids[0], 0);
	} else {
		c4iw_init_wr_wait(&ep->com.wr_wait);
3280 3281 3282
		err = cxgb4_remove_server(
				ep->com.dev->rdev.lldi.ports[0], ep->stid,
				ep->com.dev->rdev.lldi.rxq_ids[0], 0);
3283 3284 3285 3286 3287
		if (err)
			goto done;
		err = c4iw_wait_for_reply(&ep->com.dev->rdev, &ep->com.wr_wait,
					  0, 0, __func__);
	}
3288
	remove_handle(ep->com.dev, &ep->com.dev->stid_idr, ep->stid);
3289 3290
	cxgb4_free_stid(ep->com.dev->rdev.lldi.tids, ep->stid,
			ep->com.local_addr.ss_family);
3291 3292 3293 3294 3295 3296 3297 3298 3299 3300 3301 3302 3303
done:
	cm_id->rem_ref(cm_id);
	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;

3304
	mutex_lock(&ep->com.mutex);
3305 3306 3307 3308 3309 3310 3311

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

	rdev = &ep->com.dev->rdev;
	if (c4iw_fatal_error(rdev)) {
		fatal = 1;
3312
		close_complete_upcall(ep, -EIO);
3313 3314 3315 3316 3317 3318 3319 3320 3321 3322 3323 3324 3325
		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;
3326
			start_ep_timer(ep);
3327 3328 3329 3330 3331 3332 3333
		}
		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
3334
				(void)stop_ep_timer(ep);
3335 3336 3337 3338 3339 3340 3341 3342 3343 3344 3345 3346 3347 3348 3349 3350 3351
				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
3352
		if (abrupt) {
3353
			set_bit(EP_DISC_ABORT, &ep->com.history);
3354
			close_complete_upcall(ep, -ECONNRESET);
S
Steve Wise 已提交
3355
			ret = send_abort(ep, NULL, gfp);
3356 3357
		} else {
			set_bit(EP_DISC_CLOSE, &ep->com.history);
3358
			ret = send_halfclose(ep, gfp);
3359
		}
3360 3361 3362
		if (ret)
			fatal = 1;
	}
S
Steve Wise 已提交
3363
	mutex_unlock(&ep->com.mutex);
3364 3365 3366 3367 3368
	if (fatal)
		release_ep_resources(ep);
	return ret;
}

3369 3370 3371 3372
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;
3373
	int atid = be32_to_cpu(req->tid);
3374

3375 3376
	ep = (struct c4iw_ep *)lookup_atid(dev->rdev.lldi.tids,
					   (__force u32) req->tid);
3377 3378 3379 3380 3381
	if (!ep)
		return;

	switch (req->retval) {
	case FW_ENOMEM:
3382 3383 3384 3385 3386
		set_bit(ACT_RETRY_NOMEM, &ep->com.history);
		if (ep->retry_count++ < ACT_OPEN_RETRY_COUNT) {
			send_fw_act_open_req(ep, atid);
			return;
		}
3387
	case FW_EADDRINUSE:
3388 3389 3390 3391 3392
		set_bit(ACT_RETRY_INUSE, &ep->com.history);
		if (ep->retry_count++ < ACT_OPEN_RETRY_COUNT) {
			send_fw_act_open_req(ep, atid);
			return;
		}
3393 3394 3395 3396 3397 3398
		break;
	default:
		pr_info("%s unexpected ofld conn wr retval %d\n",
		       __func__, req->retval);
		break;
	}
3399 3400 3401 3402 3403
	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);
3404
	connect_reply_upcall(ep, status2errno(req->retval));
3405 3406 3407 3408 3409 3410
	state_set(&ep->com, DEAD);
	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);
3411 3412 3413 3414 3415 3416 3417 3418 3419
}

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;

3420
	rpl_skb = (struct sk_buff *)(unsigned long)req->cookie;
3421 3422 3423
	BUG_ON(!rpl_skb);
	if (req->retval) {
		PDBG("%s passive open failure %d\n", __func__, req->retval);
3424 3425 3426
		mutex_lock(&dev->rdev.stats.lock);
		dev->rdev.stats.pas_ofld_conn_fails++;
		mutex_unlock(&dev->rdev.stats.lock);
3427 3428 3429 3430
		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,
3431 3432
					(__force u32) htonl(
					(__force u32) req->tid)));
3433 3434 3435 3436 3437 3438 3439 3440
		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)
3441 3442
{
	struct cpl_fw6_msg *rpl = cplhdr(skb);
3443 3444 3445 3446 3447 3448 3449 3450 3451 3452 3453 3454 3455 3456 3457 3458 3459 3460 3461 3462 3463 3464 3465 3466 3467 3468 3469 3470
	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)
{
	u32 l2info;
3471
	u16 vlantag, len, hdr_len, eth_hdr_len;
3472 3473 3474 3475
	u8 intf;
	struct cpl_rx_pkt *cpl = cplhdr(skb);
	struct cpl_pass_accept_req *req;
	struct tcp_options_received tmp_opt;
3476
	struct c4iw_dev *dev;
3477

3478
	dev = *((struct c4iw_dev **) (skb->cb + sizeof(void *)));
3479
	/* Store values from cpl_rx_pkt in temporary location. */
3480 3481 3482 3483
	vlantag = (__force u16) cpl->vlan;
	len = (__force u16) cpl->len;
	l2info  = (__force u32) cpl->l2info;
	hdr_len = (__force u16) cpl->hdr_len;
3484 3485 3486 3487 3488 3489 3490 3491 3492 3493
	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
3494
	tcp_parse_options(skb, &tmp_opt, 0, NULL);
3495 3496 3497 3498

	req = (struct cpl_pass_accept_req *)__skb_push(skb, sizeof(*req));
	memset(req, 0, sizeof(*req));
	req->l2info = cpu_to_be16(V_SYN_INTF(intf) |
3499 3500
			 V_SYN_MAC_IDX(G_RX_MACIDX(
			 (__force int) htonl(l2info))) |
3501
			 F_SYN_XACT_MATCH);
3502 3503 3504
	eth_hdr_len = is_t4(dev->rdev.lldi.adapter_type) ?
			    G_RX_ETHHDR_LEN((__force int) htonl(l2info)) :
			    G_RX_T5_ETHHDR_LEN((__force int) htonl(l2info));
3505 3506 3507 3508 3509 3510
	req->hdr_len = cpu_to_be32(V_SYN_RX_CHAN(G_RX_CHAN(
					(__force int) htonl(l2info))) |
				   V_TCP_HDR_LEN(G_RX_TCPHDR_LEN(
					(__force int) htons(hdr_len))) |
				   V_IP_HDR_LEN(G_RX_IPHDR_LEN(
					(__force int) htons(hdr_len))) |
3511
				   V_ETH_HDR_LEN(G_RX_ETHHDR_LEN(eth_hdr_len)));
3512 3513
	req->vlan = (__force __be16) vlantag;
	req->len = (__force __be16) len;
3514 3515 3516 3517 3518 3519 3520 3521 3522 3523 3524 3525 3526 3527 3528 3529 3530 3531 3532 3533 3534
	req->tos_stid = cpu_to_be32(PASS_OPEN_TID(stid) |
				    PASS_OPEN_TOS(tos));
	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);
3535
	int ret;
3536 3537 3538 3539

	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));
3540 3541
	req->op_compl = htonl(V_WR_OP(FW_OFLD_CONNECTION_WR) | FW_WR_COMPL_F);
	req->len16_pkd = htonl(FW_WR_LEN16_V(DIV_ROUND_UP(sizeof(*req), 16)));
3542
	req->le.version_cpl = htonl(F_FW_OFLD_CONNECTION_WR_CPL);
3543
	req->le.filter = (__force __be32) filter;
3544 3545 3546 3547 3548 3549 3550 3551 3552 3553 3554 3555 3556 3557 3558 3559 3560 3561 3562 3563 3564 3565 3566 3567 3568
	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 =
		 htonl(V_FW_OFLD_CONNECTION_WR_T_STATE(TCP_SYN_RECV) |
			V_FW_OFLD_CONNECTION_WR_RCV_SCALE(cpl->tcpopt.wsf) |
			V_FW_OFLD_CONNECTION_WR_ASTID(
			GET_PASS_OPEN_TID(ntohl(cpl->tos_stid))));

	/*
	 * We store the qid in opt2 which will be used by the firmware
	 * to send us the wr response.
	 */
	req->tcb.opt2 = htonl(V_RSS_QUEUE(rss_qid));

	/*
	 * 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.
	 */
	req->tcb.opt0 = cpu_to_be64(V_MSS_IDX(0xF));
3569
	req->cookie = (unsigned long)skb;
3570 3571

	set_wr_txq(req_skb, CPL_PRIORITY_CONTROL, port_id);
3572 3573 3574 3575 3576 3577 3578
	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);
	}
3579 3580 3581 3582 3583 3584 3585 3586 3587 3588 3589 3590 3591 3592 3593 3594 3595 3596 3597 3598 3599 3600 3601 3602 3603 3604
}

/*
 * 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;
3605
	u16 rss_qid, eth_hdr_len;
3606 3607 3608 3609 3610 3611 3612 3613 3614 3615 3616 3617 3618 3619 3620 3621 3622 3623
	int step;
	u32 tx_chan;
	struct neighbour *neigh;

	/* Drop all non-SYN packets */
	if (!(cpl->l2info & cpu_to_be32(F_RXF_SYN)))
		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.
	 */
3624
	stid = (__force int) cpu_to_be32((__force u32) rss->hash_val);
3625 3626 3627 3628 3629 3630 3631

	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;
	}

3632 3633 3634 3635
	eth_hdr_len = is_t4(dev->rdev.lldi.adapter_type) ?
			    G_RX_ETHHDR_LEN(htonl(cpl->l2info)) :
			    G_RX_T5_ETHHDR_LEN(htonl(cpl->l2info));
	if (eth_hdr_len == ETH_HLEN) {
3636 3637 3638 3639 3640 3641 3642 3643 3644 3645 3646 3647 3648 3649 3650 3651 3652 3653 3654 3655
		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);

3656 3657 3658
	dst = find_route(dev, iph->daddr, iph->saddr, tcph->dest, tcph->source,
			 iph->tos);
	if (!dst) {
3659 3660 3661 3662 3663 3664
		pr_err("%s - failed to find dst entry!\n",
		       __func__);
		goto reject;
	}
	neigh = dst_neigh_lookup_skb(dst, skb);

3665 3666 3667 3668 3669 3670
	if (!neigh) {
		pr_err("%s - failed to allocate neigh!\n",
		       __func__);
		goto free_dst;
	}

3671 3672 3673 3674 3675 3676 3677 3678
	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 {
3679
		pdev = get_real_dev(neigh->dev);
3680
		e = cxgb4_l2t_get(dev->rdev.lldi.l2t, neigh,
3681 3682 3683
					pdev, 0);
		pi = (struct port_info *)netdev_priv(pdev);
		tx_chan = cxgb4_port_chan(pdev);
3684
	}
3685
	neigh_release(neigh);
3686 3687 3688 3689 3690 3691 3692 3693
	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];
3694
	window = (__force u16) htons((__force u16)tcph->window);
3695 3696

	/* Calcuate filter portion for LE region. */
3697 3698 3699
	filter = (__force unsigned int) cpu_to_be32(cxgb4_select_ntuple(
						    dev->rdev.lldi.ports[0],
						    e));
3700 3701 3702 3703 3704 3705 3706 3707 3708 3709 3710 3711 3712 3713

	/*
	 * 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:
3714 3715 3716
	return 0;
}

3717 3718 3719 3720 3721 3722 3723 3724 3725 3726 3727 3728 3729 3730 3731 3732 3733 3734
/*
 * These are the real handlers that are called from a
 * work queue.
 */
static c4iw_handler_func work_handlers[NUM_CPL_CMDS] = {
	[CPL_ACT_ESTABLISH] = act_establish,
	[CPL_ACT_OPEN_RPL] = act_open_rpl,
	[CPL_RX_DATA] = rx_data,
	[CPL_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,
3735
	[CPL_FW4_ACK] = fw4_ack,
3736 3737
	[CPL_FW6_MSG] = deferred_fw6_msg,
	[CPL_RX_PKT] = rx_pkt
3738 3739 3740 3741 3742 3743 3744
};

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

3745
	mutex_lock(&ep->com.mutex);
3746 3747
	PDBG("%s ep %p tid %u state %d\n", __func__, ep, ep->hwtid,
	     ep->com.state);
3748
	set_bit(TIMEDOUT, &ep->com.history);
3749 3750 3751 3752 3753 3754 3755 3756 3757 3758 3759 3760 3761 3762 3763 3764 3765
	switch (ep->com.state) {
	case MPA_REQ_SENT:
		__state_set(&ep->com, ABORTING);
		connect_reply_upcall(ep, -ETIMEDOUT);
		break;
	case MPA_REQ_WAIT:
		__state_set(&ep->com, ABORTING);
		break;
	case CLOSING:
	case MORIBUND:
		if (ep->com.cm_id && ep->com.qp) {
			attrs.next_state = C4IW_QP_STATE_ERROR;
			c4iw_modify_qp(ep->com.qp->rhp,
				     ep->com.qp, C4IW_QP_ATTR_NEXT_STATE,
				     &attrs, 1);
		}
		__state_set(&ep->com, ABORTING);
3766
		close_complete_upcall(ep, -ETIMEDOUT);
3767
		break;
S
Steve Wise 已提交
3768 3769 3770 3771 3772 3773 3774 3775 3776 3777
	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;
3778
	default:
J
Julia Lawall 已提交
3779
		WARN(1, "%s unexpected state ep %p tid %u state %u\n",
3780 3781 3782 3783 3784
			__func__, ep, ep->hwtid, ep->com.state);
		abort = 0;
	}
	if (abort)
		abort_connection(ep, NULL, GFP_KERNEL);
3785
	mutex_unlock(&ep->com.mutex);
3786 3787 3788 3789 3790 3791 3792 3793 3794 3795 3796 3797 3798
	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);
S
Steve Wise 已提交
3799 3800
		tmp->next = NULL;
		tmp->prev = NULL;
3801 3802 3803 3804 3805 3806 3807 3808 3809 3810 3811 3812
		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;
3813
	struct cpl_act_establish *rpl;
3814 3815 3816
	unsigned int opcode;
	int ret;

S
Steve Wise 已提交
3817
	process_timedout_eps();
3818 3819 3820 3821 3822 3823 3824 3825 3826
	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);
S
Steve Wise 已提交
3827
		process_timedout_eps();
3828 3829 3830 3831 3832 3833 3834 3835
	}
}

static DECLARE_WORK(skb_work, process_work);

static void ep_timeout(unsigned long arg)
{
	struct c4iw_ep *ep = (struct c4iw_ep *)arg;
3836
	int kickit = 0;
3837 3838

	spin_lock(&timeout_lock);
3839
	if (!test_and_set_bit(TIMEOUT, &ep->com.flags)) {
S
Steve Wise 已提交
3840 3841 3842 3843 3844 3845 3846
		/*
		 * Only insert if it is not already on the list.
		 */
		if (!ep->entry.next) {
			list_add_tail(&ep->entry, &timeout_list);
			kickit = 1;
		}
3847
	}
3848
	spin_unlock(&timeout_lock);
3849 3850
	if (kickit)
		queue_work(workq, &skb_work);
3851 3852
}

3853 3854 3855 3856 3857 3858 3859 3860 3861 3862 3863 3864 3865 3866 3867 3868 3869 3870 3871 3872 3873 3874 3875 3876 3877 3878 3879
/*
 * 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));
	}
3880
	kfree_skb(skb);
3881 3882 3883
	return 0;
}

3884 3885 3886 3887 3888 3889 3890 3891 3892
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) {
3893
	case FW6_TYPE_WR_RPL:
3894
		ret = (int)((be64_to_cpu(rpl->data[0]) >> 8) & 0xff);
3895
		wr_waitp = (struct c4iw_wr_wait *)(__force unsigned long) rpl->data[1];
3896
		PDBG("%s wr_waitp %p ret %u\n", __func__, wr_waitp, ret);
3897 3898
		if (wr_waitp)
			c4iw_wake_up(wr_waitp, ret ? -ret : 0);
3899
		kfree_skb(skb);
3900
		break;
3901 3902
	case FW6_TYPE_CQE:
	case FW6_TYPE_OFLD_CONNECTION_WR_RPL:
3903
		sched(dev, skb);
3904
		break;
3905 3906 3907
	default:
		printk(KERN_ERR MOD "%s unexpected fw6 msg type %u\n", __func__,
		       rpl->type);
3908
		kfree_skb(skb);
3909 3910 3911 3912 3913
		break;
	}
	return 0;
}

S
Steve Wise 已提交
3914 3915 3916 3917 3918 3919 3920 3921
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);
3922 3923 3924 3925 3926 3927
	if (!ep) {
		printk(KERN_WARNING MOD
		       "Abort on non-existent endpoint, tid %d\n", tid);
		kfree_skb(skb);
		return 0;
	}
3928
	if (is_neg_adv(req->status)) {
3929 3930 3931
		dev_warn(&dev->rdev.lldi.pdev->dev,
			 "Negative advice on abort - tid %u status %d (%s)\n",
			 ep->hwtid, req->status, neg_adv_str(req->status));
S
Steve Wise 已提交
3932 3933 3934 3935 3936 3937 3938 3939
		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().
3940 3941
	 * However, if we are on MPAv2 and want to retry with MPAv1
	 * then, don't wake up yet.
S
Steve Wise 已提交
3942
	 */
3943 3944 3945 3946 3947
	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);
S
Steve Wise 已提交
3948 3949 3950 3951
	sched(dev, skb);
	return 0;
}

3952 3953 3954 3955 3956 3957 3958 3959 3960 3961 3962 3963 3964 3965 3966 3967
/*
 * 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,
S
Steve Wise 已提交
3968
	[CPL_ABORT_REQ_RSS] = peer_abort_intr,
3969 3970 3971
	[CPL_RDMA_TERMINATE] = sched,
	[CPL_FW4_ACK] = sched,
	[CPL_SET_TCB_RPL] = set_tcb_rpl,
3972 3973
	[CPL_FW6_MSG] = fw6_msg,
	[CPL_RX_PKT] = sched
3974 3975
};

3976 3977
int __init c4iw_cm_init(void)
{
3978
	spin_lock_init(&timeout_lock);
3979 3980 3981 3982 3983 3984 3985 3986 3987
	skb_queue_head_init(&rxq);

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

	return 0;
}

3988
void c4iw_cm_term(void)
3989
{
3990
	WARN_ON(!list_empty(&timeout_list));
3991 3992 3993
	flush_workqueue(workq);
	destroy_workqueue(workq);
}