cm.c 106.6 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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int c4iw_max_read_depth = 8;
module_param(c4iw_max_read_depth, int, 0644);
MODULE_PARM_DESC(c4iw_max_read_depth, "Per-connection max ORD/IRD (default=8)");

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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)] -
		   sizeof(struct iphdr) - sizeof(struct tcphdr);
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	ep->mss = ep->emss;
	if (GET_TCPOPT_TSTAMP(opt))
		ep->emss -= 12;
	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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		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)
{
	printk(KERN_ERR MOD "ARP failure duing connect\n");
	kfree_skb(skb);
}

/*
 * Handle an ARP failure for a CPL_ABORT_REQ.  Change it into a no RST variant
 * and send it along.
 */
static void abort_arp_failure(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);

	flowc->op_to_nparams = cpu_to_be32(FW_WR_OP(FW_FLOWC_WR) |
					   FW_FLOWC_WR_NPARAMS(8));
	flowc->flowid_len16 = cpu_to_be32(FW_WR_LEN16(DIV_ROUND_UP(flowclen,
					  16)) | FW_WR_FLOWID(ep->hwtid));

	flowc->mnemval[0].mnemonic = FW_FLOWC_MNEM_PFNVFN;
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	flowc->mnemval[0].val = cpu_to_be32(PCI_FUNC(ep->com.dev->rdev.lldi.pdev->devfn) << 8);
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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));
}

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static void best_mtu(const unsigned short *mtus, unsigned short mtu,
		     unsigned int *idx, int use_ts)
{
	unsigned short hdr_size = sizeof(struct iphdr) +
				  sizeof(struct tcphdr) +
				  (use_ts ? 12 : 0);
	unsigned short data_size = mtu - hdr_size;

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

583 584 585
static int send_connect(struct c4iw_ep *ep)
{
	struct cpl_act_open_req *req;
586
	struct cpl_t5_act_open_req *t5_req;
587 588
	struct cpl_act_open_req6 *req6;
	struct cpl_t5_act_open_req6 *t5_req6;
589 590 591 592 593
	struct sk_buff *skb;
	u64 opt0;
	u32 opt2;
	unsigned int mtu_idx;
	int wscale;
594 595 596 597 598 599 600
	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);
601 602 603 604 605 606 607 608
	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;
609
	int win;
610 611 612 613

	wrlen = (ep->com.remote_addr.ss_family == AF_INET) ?
			roundup(sizev4, 16) :
			roundup(sizev6, 16);
614 615 616 617 618 619 620 621 622

	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
623
	set_wr_txq(skb, CPL_PRIORITY_SETUP, ep->ctrlq_idx);
624

625 626
	best_mtu(ep->com.dev->rdev.lldi.mtus, ep->mtu, &mtu_idx,
		 enable_tcp_timestamps);
627
	wscale = compute_wscale(rcv_win);
628 629 630 631 632 633 634 635 636

	/*
	 * 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;

637 638
	opt0 = (nocong ? NO_CONG(1) : 0) |
	       KEEP_ALIVE(1) |
639
	       DELACK(1) |
640 641 642 643 644 645
	       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
646
	       ULP_MODE(ULP_MODE_TCPDDP) |
647
	       RCV_BUFSIZ(win);
648
	opt2 = RX_CHANNEL(0) |
649
	       CCTRL_ECN(enable_ecn) |
650 651 652 653 654 655 656
	       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);
657 658 659 660
	if (is_t5(ep->com.dev->rdev.lldi.adapter_type)) {
		opt2 |= T5_OPT_2_VALID;
		opt2 |= V_CONG_CNTRL(CONG_ALG_TAHOE);
	}
661 662
	t4_set_arp_err_handler(skb, NULL, act_open_req_arp_failure);

663
	if (is_t4(ep->com.dev->rdev.lldi.adapter_type)) {
664 665 666 667 668 669 670 671 672 673 674
		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);
675 676 677
			req->params = cpu_to_be32(cxgb4_select_ntuple(
						ep->com.dev->rdev.lldi.ports[0],
						ep->l2t));
678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696
			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);
697 698 699
			req6->params = cpu_to_be32(cxgb4_select_ntuple(
						ep->com.dev->rdev.lldi.ports[0],
						ep->l2t));
700 701
			req6->opt2 = cpu_to_be32(opt2);
		}
702
	} else {
703 704 705 706 707 708 709
		u32 isn = (prandom_u32() & ~7UL) - 1;

		opt2 |= T5_OPT_2_VALID;
		opt2 |= CONG_CNTRL_VALID; /* OPT_2_ISS for T5 */
		if (peer2peer)
			isn += 4;

710 711 712 713 714
		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(
715 716
					MK_OPCODE_TID(CPL_ACT_OPEN_REQ,
					((ep->rss_qid << 14) | ep->atid)));
717 718 719 720 721 722
			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(
723 724 725
						     cxgb4_select_ntuple(
					     ep->com.dev->rdev.lldi.ports[0],
					     ep->l2t)));
726 727 728
			t5_req->rsvd = cpu_to_be32(isn);
			PDBG("%s snd_isn %u\n", __func__,
			     be32_to_cpu(t5_req->rsvd));
729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748
			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);
			t5_req6->params = (__force __be64)cpu_to_be32(
749 750 751
							cxgb4_select_ntuple(
						ep->com.dev->rdev.lldi.ports[0],
						ep->l2t));
752 753 754
			t5_req6->rsvd = cpu_to_be32(isn);
			PDBG("%s snd_isn %u\n", __func__,
			     be32_to_cpu(t5_req6->rsvd));
755 756
			t5_req6->opt2 = cpu_to_be32(opt2);
		}
757 758
	}

759
	set_bit(ACT_OPEN_REQ, &ep->com.history);
760 761 762
	return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
}

763 764
static void send_mpa_req(struct c4iw_ep *ep, struct sk_buff *skb,
		u8 mpa_rev_to_use)
765 766 767 768
{
	int mpalen, wrlen;
	struct fw_ofld_tx_data_wr *req;
	struct mpa_message *mpa;
769
	struct mpa_v2_conn_params mpa_v2_params;
770 771 772 773 774 775

	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;
776 777
	if (mpa_rev_to_use == 2)
		mpalen += sizeof(struct mpa_v2_conn_params);
778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802
	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(
		FW_WR_OP(FW_OFLD_TX_DATA_WR) |
		FW_WR_COMPL(1) |
		FW_WR_IMMDLEN(mpalen));
	req->flowid_len16 = cpu_to_be32(
		FW_WR_FLOWID(ep->hwtid) |
		FW_WR_LEN16(wrlen >> 4));
	req->plen = cpu_to_be32(mpalen);
	req->tunnel_to_proxy = cpu_to_be32(
		FW_OFLD_TX_DATA_WR_FLUSH(1) |
		FW_OFLD_TX_DATA_WR_SHOVE(1));

	mpa = (struct mpa_message *)(req + 1);
	memcpy(mpa->key, MPA_KEY_REQ, sizeof(mpa->key));
	mpa->flags = (crc_enabled ? MPA_CRC : 0) |
803 804
		     (markers_enabled ? MPA_MARKERS : 0) |
		     (mpa_rev_to_use == 2 ? MPA_ENHANCED_RDMA_CONN : 0);
805
	mpa->private_data_size = htons(ep->plen);
806
	mpa->revision = mpa_rev_to_use;
807
	if (mpa_rev_to_use == 1) {
808
		ep->tried_with_mpa_v1 = 1;
809 810
		ep->retry_with_mpa_v1 = 0;
	}
811 812

	if (mpa_rev_to_use == 2) {
813 814
		mpa->private_data_size = htons(ntohs(mpa->private_data_size) +
					       sizeof (struct mpa_v2_conn_params));
815 816 817 818 819 820 821 822 823 824 825 826 827 828
		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));
829

830 831 832 833 834 835 836 837
		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);
838 839 840 841 842 843 844 845 846 847 848 849

	/*
	 * 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);
850
	__state_set(&ep->com, MPA_REQ_SENT);
851
	ep->mpa_attr.initiator = 1;
852
	ep->snd_seq += mpalen;
853 854 855 856 857 858 859 860 861
	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;
862
	struct mpa_v2_conn_params mpa_v2_params;
863 864 865 866

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

	mpalen = sizeof(*mpa) + plen;
867 868
	if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn)
		mpalen += sizeof(struct mpa_v2_conn_params);
869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895
	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(
		FW_WR_OP(FW_OFLD_TX_DATA_WR) |
		FW_WR_COMPL(1) |
		FW_WR_IMMDLEN(mpalen));
	req->flowid_len16 = cpu_to_be32(
		FW_WR_FLOWID(ep->hwtid) |
		FW_WR_LEN16(wrlen >> 4));
	req->plen = cpu_to_be32(mpalen);
	req->tunnel_to_proxy = cpu_to_be32(
		FW_OFLD_TX_DATA_WR_FLUSH(1) |
		FW_OFLD_TX_DATA_WR_SHOVE(1));

	mpa = (struct mpa_message *)(req + 1);
	memset(mpa, 0, sizeof(*mpa));
	memcpy(mpa->key, MPA_KEY_REP, sizeof(mpa->key));
	mpa->flags = MPA_REJECT;
896
	mpa->revision = ep->mpa_attr.version;
897
	mpa->private_data_size = htons(plen);
898 899 900

	if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) {
		mpa->flags |= MPA_ENHANCED_RDMA_CONN;
901 902
		mpa->private_data_size = htons(ntohs(mpa->private_data_size) +
					       sizeof (struct mpa_v2_conn_params));
903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920
		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);
921 922 923 924 925 926 927 928 929 930 931

	/*
	 * 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;
932
	ep->snd_seq += mpalen;
933 934 935 936 937 938 939 940 941
	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;
942
	struct mpa_v2_conn_params mpa_v2_params;
943 944 945 946

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

	mpalen = sizeof(*mpa) + plen;
947 948
	if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn)
		mpalen += sizeof(struct mpa_v2_conn_params);
949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976
	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(
		FW_WR_OP(FW_OFLD_TX_DATA_WR) |
		FW_WR_COMPL(1) |
		FW_WR_IMMDLEN(mpalen));
	req->flowid_len16 = cpu_to_be32(
		FW_WR_FLOWID(ep->hwtid) |
		FW_WR_LEN16(wrlen >> 4));
	req->plen = cpu_to_be32(mpalen);
	req->tunnel_to_proxy = cpu_to_be32(
		FW_OFLD_TX_DATA_WR_FLUSH(1) |
		FW_OFLD_TX_DATA_WR_SHOVE(1));

	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);
977
	mpa->revision = ep->mpa_attr.version;
978
	mpa->private_data_size = htons(plen);
979 980 981

	if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) {
		mpa->flags |= MPA_ENHANCED_RDMA_CONN;
982 983
		mpa->private_data_size = htons(ntohs(mpa->private_data_size) +
					       sizeof (struct mpa_v2_conn_params));
984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006
		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);
1007 1008 1009 1010 1011 1012 1013 1014 1015

	/*
	 * 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;
1016
	__state_set(&ep->com, MPA_REP_SENT);
1017
	ep->snd_seq += mpalen;
1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033
	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));

1034
	mutex_lock(&ep->com.mutex);
1035 1036 1037 1038 1039
	dst_confirm(ep->dst);

	/* setup the hwtid for this connection */
	ep->hwtid = tid;
	cxgb4_insert_tid(t, ep, tid);
1040
	insert_handle(dev, &dev->hwtid_idr, ep, ep->hwtid);
1041 1042 1043 1044 1045 1046 1047

	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 */
1048
	remove_handle(ep->com.dev, &ep->com.dev->atid_idr, atid);
1049
	cxgb4_free_atid(t, atid);
1050
	set_bit(ACT_ESTAB, &ep->com.history);
1051 1052 1053

	/* start MPA negotiation */
	send_flowc(ep, NULL);
1054 1055 1056 1057
	if (ep->retry_with_mpa_v1)
		send_mpa_req(ep, skb, 1);
	else
		send_mpa_req(ep, skb, mpa_rev);
1058
	mutex_unlock(&ep->com.mutex);
1059 1060 1061
	return 0;
}

1062
static void close_complete_upcall(struct c4iw_ep *ep, int status)
1063 1064 1065 1066 1067 1068
{
	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;
1069
	event.status = status;
1070 1071 1072 1073 1074 1075
	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;
1076
		set_bit(CLOSE_UPCALL, &ep->com.history);
1077 1078 1079 1080 1081 1082
	}
}

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);
1083
	__state_set(&ep->com, ABORTING);
1084
	set_bit(ABORT_CONN, &ep->com.history);
1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098
	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);
1099
		set_bit(DISCONN_UPCALL, &ep->com.history);
1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116
	}
}

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;
1117
		set_bit(ABORT_UPCALL, &ep->com.history);
1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128
	}
}

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;
1129 1130 1131 1132
	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));
1133 1134

	if ((status == 0) || (status == -ECONNREFUSED)) {
1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147
		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);
		}
1148
	}
1149 1150 1151

	PDBG("%s ep %p tid %u status %d\n", __func__, ep,
	     ep->hwtid, status);
1152
	set_bit(CONN_RPL_UPCALL, &ep->com.history);
1153 1154
	ep->com.cm_id->event_handler(ep->com.cm_id, &event);

1155 1156 1157 1158 1159 1160
	if (status < 0) {
		ep->com.cm_id->rem_ref(ep->com.cm_id);
		ep->com.cm_id = NULL;
	}
}

1161
static int connect_request_upcall(struct c4iw_ep *ep)
1162 1163
{
	struct iw_cm_event event;
1164
	int ret;
1165 1166 1167 1168

	PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
	memset(&event, 0, sizeof(event));
	event.event = IW_CM_EVENT_CONNECT_REQUEST;
1169 1170 1171 1172
	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));
1173
	event.provider_data = ep;
1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188
	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 */
		event.ord = c4iw_max_read_depth;
		event.ird = c4iw_max_read_depth;
		event.private_data_len = ep->plen;
		event.private_data = ep->mpa_pkt + sizeof(struct mpa_message);
	}
1189 1190 1191 1192 1193
	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);
1194
	set_bit(CONNREQ_UPCALL, &ep->com.history);
1195
	c4iw_put_ep(&ep->parent_ep->com);
1196
	return ret;
1197 1198 1199 1200 1201 1202 1203 1204 1205
}

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;
1206 1207
	event.ird = ep->ird;
	event.ord = ep->ord;
1208 1209 1210
	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);
1211
		set_bit(ESTAB_UPCALL, &ep->com.history);
1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227
	}
}

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;
	}

1228 1229 1230 1231 1232 1233 1234 1235
	/*
	 * 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;

1236 1237 1238 1239 1240
	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));
1241 1242 1243
	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
1244
	set_wr_txq(skb, CPL_PRIORITY_ACK, ep->ctrlq_idx);
1245 1246 1247 1248
	c4iw_ofld_send(&ep->com.dev->rdev, skb);
	return credits;
}

1249
static int process_mpa_reply(struct c4iw_ep *ep, struct sk_buff *skb)
1250 1251
{
	struct mpa_message *mpa;
1252
	struct mpa_v2_conn_params *mpa_v2_params;
1253
	u16 plen;
1254 1255
	u16 resp_ird, resp_ord;
	u8 rtr_mismatch = 0, insuff_ird = 0;
1256 1257 1258
	struct c4iw_qp_attributes attrs;
	enum c4iw_qp_attr_mask mask;
	int err;
1259
	int disconnect = 0;
1260 1261 1262 1263

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

	/*
S
Steve Wise 已提交
1264 1265 1266
	 * Stop mpa timer.  If it expired, then
	 * we ignore the MPA reply.  process_timeout()
	 * will abort the connection.
1267
	 */
S
Steve Wise 已提交
1268
	if (stop_ep_timer(ep))
1269
		return 0;
1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290

	/*
	 * 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))
1291
		return 0;
1292 1293 1294
	mpa = (struct mpa_message *) ep->mpa_pkt;

	/* Validate MPA header. */
1295 1296 1297
	if (mpa->revision > mpa_rev) {
		printk(KERN_ERR MOD "%s MPA version mismatch. Local = %d,"
		       " Received = %d\n", __func__, mpa_rev, mpa->revision);
1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330
		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))
1331
		return 0;
1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342

	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.
	 */
1343
	__state_set(&ep->com, FPDU_MODE);
1344 1345 1346
	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;
1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388
	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;

			/*
			 * This is a double-check. Ideally, below checks are
			 * not required since ird/ord stuff has been taken
			 * care of in c4iw_accept_cr
			 */
			if ((ep->ird < resp_ord) || (ep->ord > resp_ird)) {
				err = -ENOMEM;
				ep->ird = resp_ord;
				ep->ord = resp_ird;
				insuff_ird = 1;
			}

			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;

1389
	PDBG("%s - crc_enabled=%d, recv_marker_enabled=%d, "
1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401
	     "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
	 */
1402
	if ((ep->mpa_attr.version == 2) && peer2peer &&
1403 1404 1405 1406
			(ep->mpa_attr.p2p_type != p2p_type)) {
		ep->mpa_attr.p2p_type = FW_RI_INIT_P2PTYPE_DISABLED;
		rtr_mismatch = 1;
	}
1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422

	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;
1423 1424 1425 1426 1427 1428 1429 1430 1431 1432

	/*
	 * 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;
1433
		attrs.send_term = 1;
1434
		err = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
1435
				C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
1436
		err = -ENOMEM;
1437
		disconnect = 1;
1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452
		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;
1453
		attrs.send_term = 1;
1454
		err = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
1455
				C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
1456
		err = -ENOMEM;
1457
		disconnect = 1;
1458 1459
		goto out;
	}
1460 1461
	goto out;
err:
1462
	__state_set(&ep->com, ABORTING);
1463
	send_abort(ep, skb, GFP_KERNEL);
1464 1465
out:
	connect_reply_upcall(ep, err);
1466
	return disconnect;
1467 1468 1469 1470 1471
}

static void process_mpa_request(struct c4iw_ep *ep, struct sk_buff *skb)
{
	struct mpa_message *mpa;
1472
	struct mpa_v2_conn_params *mpa_v2_params;
1473 1474 1475 1476 1477 1478 1479 1480 1481
	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
1482
		(void)stop_ep_timer(ep);
1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508
		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.
	 */
1509 1510 1511
	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
1512
		(void)stop_ep_timer(ep);
1513 1514 1515 1516 1517
		abort_connection(ep, skb, GFP_KERNEL);
		return;
	}

	if (memcmp(mpa->key, MPA_KEY_REQ, sizeof(mpa->key))) {
S
Steve Wise 已提交
1518
		(void)stop_ep_timer(ep);
1519 1520 1521 1522 1523 1524 1525 1526 1527 1528
		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
1529
		(void)stop_ep_timer(ep);
1530 1531 1532 1533 1534 1535 1536 1537
		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
1538
		(void)stop_ep_timer(ep);
1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557
		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;
1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588
	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;
			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;

1589 1590 1591 1592 1593 1594
	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
1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608
	/*
	 * 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 {
1609
			abort_connection(ep, skb, GFP_KERNEL);
S
Steve Wise 已提交
1610 1611
		}
		mutex_unlock(&ep->parent_ep->com.mutex);
1612
	}
1613 1614 1615 1616 1617 1618 1619 1620 1621 1622
	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;
1623
	__u8 status = hdr->status;
1624
	int disconnect = 0;
1625 1626

	ep = lookup_tid(t, tid);
1627 1628
	if (!ep)
		return 0;
1629 1630 1631
	PDBG("%s ep %p tid %u dlen %u\n", __func__, ep, ep->hwtid, dlen);
	skb_pull(skb, sizeof(*hdr));
	skb_trim(skb, dlen);
1632
	mutex_lock(&ep->com.mutex);
1633 1634 1635 1636

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

1637
	switch (ep->com.state) {
1638
	case MPA_REQ_SENT:
1639
		ep->rcv_seq += dlen;
1640
		disconnect = process_mpa_reply(ep, skb);
1641 1642
		break;
	case MPA_REQ_WAIT:
1643
		ep->rcv_seq += dlen;
1644 1645
		process_mpa_request(ep, skb);
		break;
1646 1647 1648
	case FPDU_MODE: {
		struct c4iw_qp_attributes attrs;
		BUG_ON(!ep->com.qp);
1649
		if (status)
1650
			pr_err("%s Unexpected streaming data." \
1651 1652
			       " qpid %u ep %p state %d tid %u status %d\n",
			       __func__, ep->com.qp->wq.sq.qid, ep,
1653
			       ep->com.state, ep->hwtid, status);
1654
		attrs.next_state = C4IW_QP_STATE_TERMINATE;
1655
		c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
1656 1657
			       C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
		disconnect = 1;
1658 1659
		break;
	}
1660 1661 1662
	default:
		break;
	}
1663
	mutex_unlock(&ep->com.mutex);
1664 1665
	if (disconnect)
		c4iw_ep_disconnect(ep, 0, GFP_KERNEL);
1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 1677
	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);
1678 1679 1680 1681
	if (!ep) {
		printk(KERN_WARNING MOD "Abort rpl to freed endpoint\n");
		return 0;
	}
1682
	PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1683
	mutex_lock(&ep->com.mutex);
1684 1685
	switch (ep->com.state) {
	case ABORTING:
1686
		c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
1687 1688 1689 1690 1691 1692 1693 1694
		__state_set(&ep->com, DEAD);
		release = 1;
		break;
	default:
		printk(KERN_ERR "%s ep %p state %d\n",
		     __func__, ep, ep->com.state);
		break;
	}
1695
	mutex_unlock(&ep->com.mutex);
1696 1697 1698 1699 1700 1701

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

1702 1703 1704 1705 1706 1707
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;
1708
	struct sockaddr_in *sin;
1709
	int win;
1710 1711 1712 1713 1714 1715

	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));
	req->len16_pkd = htonl(FW_WR_LEN16(DIV_ROUND_UP(sizeof(*req), 16)));
1716 1717
	req->le.filter = cpu_to_be32(cxgb4_select_ntuple(
				     ep->com.dev->rdev.lldi.ports[0],
1718
				     ep->l2t));
1719
	sin = (struct sockaddr_in *)&ep->com.mapped_local_addr;
1720 1721
	req->le.lport = sin->sin_port;
	req->le.u.ipv4.lip = sin->sin_addr.s_addr;
1722
	sin = (struct sockaddr_in *)&ep->com.mapped_remote_addr;
1723 1724
	req->le.pport = sin->sin_port;
	req->le.u.ipv4.pip = sin->sin_addr.s_addr;
1725 1726 1727 1728 1729
	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);
1730
	req->tcb.tx_max = (__force __be32) jiffies;
1731
	req->tcb.rcv_adv = htons(1);
1732 1733
	best_mtu(ep->com.dev->rdev.lldi.mtus, ep->mtu, &mtu_idx,
		 enable_tcp_timestamps);
1734
	wscale = compute_wscale(rcv_win);
1735 1736 1737 1738 1739 1740 1741 1742 1743

	/*
	 * 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;

1744
	req->tcb.opt0 = (__force __be64) (TCAM_BYPASS(1) |
1745 1746 1747 1748 1749 1750 1751 1752 1753 1754
		(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) |
1755
		RCV_BUFSIZ(win));
1756
	req->tcb.opt2 = (__force __be32) (PACE(1) |
1757 1758 1759
		TX_QUEUE(ep->com.dev->rdev.lldi.tx_modq[ep->tx_chan]) |
		RX_CHANNEL(0) |
		CCTRL_ECN(enable_ecn) |
1760
		RSS_QUEUE_VALID | RSS_QUEUE(ep->rss_qid));
1761
	if (enable_tcp_timestamps)
1762
		req->tcb.opt2 |= (__force __be32) TSTAMPS_EN(1);
1763
	if (enable_tcp_sack)
1764
		req->tcb.opt2 |= (__force __be32) SACK_EN(1);
1765
	if (wscale && enable_tcp_window_scaling)
1766 1767 1768
		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);
1769 1770
	set_wr_txq(skb, CPL_PRIORITY_CONTROL, ep->ctrlq_idx);
	set_bit(ACT_OFLD_CONN, &ep->com.history);
1771 1772 1773
	c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
}

1774 1775 1776 1777 1778 1779 1780 1781 1782
/*
 * 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;
}

1783 1784 1785 1786 1787 1788 1789 1790 1791
/* 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;
}

1792 1793 1794 1795 1796 1797 1798
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);
}

1799 1800
#define ACT_OPEN_RETRY_COUNT 2

1801 1802 1803 1804 1805 1806 1807 1808 1809 1810 1811 1812 1813 1814 1815 1816 1817 1818 1819 1820 1821 1822 1823 1824 1825 1826 1827 1828 1829 1830 1831 1832 1833 1834 1835 1836 1837 1838 1839 1840 1841 1842 1843 1844 1845 1846
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];
1847
		set_tcp_window(ep, (struct port_info *)netdev_priv(pdev));
1848 1849 1850 1851 1852 1853 1854 1855
		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
1856 1857
		ep->tx_chan = cxgb4_port_chan(pdev);
		ep->smac_idx = (cxgb4_port_viid(pdev) & 0x7F) << 1;
1858 1859
		step = cdev->rdev.lldi.ntxq /
			cdev->rdev.lldi.nchan;
S
Steve Wise 已提交
1860 1861
		ep->txq_idx = cxgb4_port_idx(pdev) * step;
		ep->ctrlq_idx = cxgb4_port_idx(pdev);
1862 1863 1864
		step = cdev->rdev.lldi.nrxq /
			cdev->rdev.lldi.nchan;
		ep->rss_qid = cdev->rdev.lldi.rxq_ids[
S
Steve Wise 已提交
1865
			cxgb4_port_idx(pdev) * step];
1866
		set_tcp_window(ep, (struct port_info *)netdev_priv(pdev));
1867 1868 1869 1870 1871 1872 1873 1874 1875 1876 1877 1878 1879 1880 1881

		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;
}

1882 1883 1884
static int c4iw_reconnect(struct c4iw_ep *ep)
{
	int err = 0;
1885 1886 1887 1888
	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;
1889 1890 1891 1892 1893 1894
	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;
1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910

	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 */
1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925
	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) {
1926 1927 1928 1929
		pr_err("%s - cannot find route.\n", __func__);
		err = -EHOSTUNREACH;
		goto fail3;
	}
1930 1931
	err = import_ep(ep, iptype, ra, ep->dst, ep->com.dev, false);
	if (err) {
1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966
		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;
}

1967 1968 1969 1970 1971 1972 1973 1974
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));
1975 1976 1977 1978
	struct sockaddr_in *la;
	struct sockaddr_in *ra;
	struct sockaddr_in6 *la6;
	struct sockaddr_in6 *ra6;
1979 1980

	ep = lookup_atid(t, atid);
1981 1982 1983 1984
	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;
1985 1986 1987 1988

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

1989
	if (is_neg_adv(status)) {
1990 1991 1992 1993 1994
		printk(KERN_WARNING MOD "Connection problems for atid %u\n",
			atid);
		return 0;
	}

1995 1996
	set_bit(ACT_OPEN_RPL, &ep->com.history);

1997 1998 1999 2000 2001 2002 2003
	/*
	 * Log interesting failures.
	 */
	switch (status) {
	case CPL_ERR_CONN_RESET:
	case CPL_ERR_CONN_TIMEDOUT:
		break;
2004
	case CPL_ERR_TCAM_FULL:
2005
		mutex_lock(&dev->rdev.stats.lock);
2006
		dev->rdev.stats.tcam_full++;
2007 2008 2009
		mutex_unlock(&dev->rdev.stats.lock);
		if (ep->com.local_addr.ss_family == AF_INET &&
		    dev->rdev.lldi.enable_fw_ofld_conn) {
2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026
			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;
		}
2027
		break;
2028
	default:
2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039
		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));
		}
2040 2041 2042
		break;
	}

2043 2044 2045 2046 2047 2048
	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));

2049
	remove_handle(ep->com.dev, &ep->com.dev->atid_idr, atid);
2050 2051 2052 2053 2054 2055 2056 2057 2058 2059 2060 2061 2062 2063 2064 2065
	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) {
2066 2067
		PDBG("%s stid %d lookup failure!\n", __func__, stid);
		goto out;
2068 2069 2070
	}
	PDBG("%s ep %p status %d error %d\n", __func__, ep,
	     rpl->status, status2errno(rpl->status));
2071
	c4iw_wake_up(&ep->com.wr_wait, status2errno(rpl->status));
2072

2073
out:
2074 2075 2076 2077 2078 2079 2080 2081 2082 2083 2084
	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);
2085
	c4iw_wake_up(&ep->com.wr_wait, status2errno(rpl->status));
2086 2087 2088
	return 0;
}

2089
static void accept_cr(struct c4iw_ep *ep, struct sk_buff *skb,
2090 2091 2092 2093 2094 2095 2096
		      struct cpl_pass_accept_req *req)
{
	struct cpl_pass_accept_rpl *rpl;
	unsigned int mtu_idx;
	u64 opt0;
	u32 opt2;
	int wscale;
2097
	struct cpl_t5_pass_accept_rpl *rpl5 = NULL;
2098
	int win;
2099 2100 2101

	PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
	BUG_ON(skb_cloned(skb));
2102

2103
	skb_get(skb);
2104 2105 2106 2107 2108 2109 2110 2111 2112 2113 2114 2115 2116 2117
	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,
		 enable_tcp_timestamps && req->tcpopt.tstamp);
2118
	wscale = compute_wscale(rcv_win);
2119 2120 2121 2122 2123 2124 2125 2126

	/*
	 * 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;
2127 2128
	opt0 = (nocong ? NO_CONG(1) : 0) |
	       KEEP_ALIVE(1) |
2129
	       DELACK(1) |
2130 2131 2132 2133 2134
	       WND_SCALE(wscale) |
	       MSS_IDX(mtu_idx) |
	       L2T_IDX(ep->l2t->idx) |
	       TX_CHAN(ep->tx_chan) |
	       SMAC_SEL(ep->smac_idx) |
2135
	       DSCP(ep->tos >> 2) |
S
Steve Wise 已提交
2136
	       ULP_MODE(ULP_MODE_TCPDDP) |
2137
	       RCV_BUFSIZ(win);
2138 2139 2140 2141 2142 2143 2144 2145 2146
	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);
2147 2148 2149 2150 2151 2152 2153 2154 2155
	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);
	}
2156
	if (is_t5(ep->com.dev->rdev.lldi.adapter_type)) {
2157
		u32 isn = (prandom_u32() & ~7UL) - 1;
2158 2159
		opt2 |= T5_OPT_2_VALID;
		opt2 |= V_CONG_CNTRL(CONG_ALG_TAHOE);
2160 2161 2162 2163 2164 2165 2166
		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));
2167
	}
2168 2169 2170

	rpl->opt0 = cpu_to_be64(opt0);
	rpl->opt2 = cpu_to_be32(opt2);
S
Steve Wise 已提交
2171
	set_wr_txq(skb, CPL_PRIORITY_SETUP, ep->ctrlq_idx);
2172
	t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
2173 2174 2175 2176 2177
	c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);

	return;
}

2178
static void reject_cr(struct c4iw_dev *dev, u32 hwtid, struct sk_buff *skb)
2179
{
2180
	PDBG("%s c4iw_dev %p tid %u\n", __func__, dev, hwtid);
2181 2182 2183 2184 2185 2186 2187
	BUG_ON(skb_cloned(skb));
	skb_trim(skb, sizeof(struct cpl_tid_release));
	skb_get(skb);
	release_tid(&dev->rdev, hwtid, skb);
	return;
}

2188 2189
static void get_4tuple(struct cpl_pass_accept_req *req, int *iptype,
		       __u8 *local_ip, __u8 *peer_ip,
2190 2191 2192 2193 2194
		       __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);
2195
	struct ipv6hdr *ip6 = (struct ipv6hdr *)((u8 *)(req + 1) + eth_len);
2196 2197 2198
	struct tcphdr *tcp = (struct tcphdr *)
			     ((u8 *)(req + 1) + eth_len + ip_len);

2199 2200 2201 2202 2203 2204 2205 2206 2207 2208 2209 2210 2211 2212 2213
	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);
	}
2214 2215 2216 2217 2218 2219 2220 2221
	*peer_port = tcp->source;
	*local_port = tcp->dest;

	return;
}

static int pass_accept_req(struct c4iw_dev *dev, struct sk_buff *skb)
{
2222
	struct c4iw_ep *child_ep = NULL, *parent_ep;
2223 2224 2225 2226 2227
	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;
2228
	__u8 local_ip[16], peer_ip[16];
2229
	__be16 local_port, peer_port;
2230
	int err;
2231
	u16 peer_mss = ntohs(req->tcpopt.mss);
2232
	int iptype;
2233
	unsigned short hdrs;
2234 2235

	parent_ep = lookup_stid(t, stid);
2236 2237 2238 2239 2240
	if (!parent_ep) {
		PDBG("%s connect request on invalid stid %d\n", __func__, stid);
		goto reject;
	}

2241 2242 2243 2244 2245 2246
	if (state_read(&parent_ep->com) != LISTEN) {
		printk(KERN_ERR "%s - listening ep not in LISTEN\n",
		       __func__);
		goto reject;
	}

2247 2248
	get_4tuple(req, &iptype, local_ip, peer_ip, &local_port, &peer_port);

2249
	/* Find output route */
2250 2251 2252 2253 2254 2255 2256 2257 2258 2259 2260 2261 2262 2263 2264 2265 2266 2267 2268
	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) {
2269 2270 2271 2272
		printk(KERN_ERR MOD "%s - failed to find dst entry!\n",
		       __func__);
		goto reject;
	}
2273 2274 2275 2276

	child_ep = alloc_ep(sizeof(*child_ep), GFP_KERNEL);
	if (!child_ep) {
		printk(KERN_ERR MOD "%s - failed to allocate ep entry!\n",
2277 2278 2279 2280 2281
		       __func__);
		dst_release(dst);
		goto reject;
	}

2282
	err = import_ep(child_ep, iptype, peer_ip, dst, dev, false);
2283 2284
	if (err) {
		printk(KERN_ERR MOD "%s - failed to allocate l2t entry!\n",
2285 2286
		       __func__);
		dst_release(dst);
2287
		kfree(child_ep);
2288 2289
		goto reject;
	}
2290

2291 2292 2293 2294
	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;
2295

2296 2297 2298
	state_set(&child_ep->com, CONNECTING);
	child_ep->com.dev = dev;
	child_ep->com.cm_id = NULL;
2299 2300 2301 2302 2303 2304 2305 2306 2307 2308 2309 2310 2311 2312 2313 2314 2315 2316 2317 2318 2319
	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);
	}
2320 2321 2322 2323 2324 2325 2326
	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__,
2327
	     child_ep->tx_chan, child_ep->smac_idx, child_ep->rss_qid);
2328 2329 2330

	init_timer(&child_ep->timer);
	cxgb4_insert_tid(t, child_ep, hwtid);
2331
	insert_handle(dev, &dev->hwtid_idr, child_ep, child_ep->hwtid);
2332
	accept_cr(child_ep, skb, req);
2333
	set_bit(PASS_ACCEPT_REQ, &child_ep->com.history);
2334 2335
	goto out;
reject:
2336
	reject_cr(dev, hwtid, skb);
2337 2338 2339 2340 2341 2342 2343 2344 2345 2346 2347 2348 2349 2350 2351 2352
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);

2353 2354 2355
	PDBG("%s ep %p hwtid %u tcp_opt 0x%02x\n", __func__, ep, tid,
	     ntohs(req->tcp_opt));

2356 2357 2358 2359 2360 2361
	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);
2362
	set_bit(PASS_ESTAB, &ep->com.history);
2363 2364 2365 2366 2367 2368 2369 2370 2371 2372 2373 2374 2375

	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
2376
	int ret;
2377 2378 2379 2380 2381

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

2382
	set_bit(PEER_CLOSE, &ep->com.history);
2383
	mutex_lock(&ep->com.mutex);
2384 2385 2386 2387 2388 2389 2390 2391 2392 2393 2394 2395 2396 2397 2398 2399 2400 2401
	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);
2402
		c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
2403 2404 2405 2406
		break;
	case MPA_REP_SENT:
		__state_set(&ep->com, CLOSING);
		PDBG("waking up ep %p tid %u\n", ep, ep->hwtid);
2407
		c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
2408 2409
		break;
	case FPDU_MODE:
2410
		start_ep_timer(ep);
2411
		__state_set(&ep->com, CLOSING);
2412
		attrs.next_state = C4IW_QP_STATE_CLOSING;
S
Steve Wise 已提交
2413
		ret = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
2414
				       C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
S
Steve Wise 已提交
2415 2416 2417 2418
		if (ret != -ECONNRESET) {
			peer_close_upcall(ep);
			disconnect = 1;
		}
2419 2420 2421 2422 2423 2424 2425 2426 2427
		break;
	case ABORTING:
		disconnect = 0;
		break;
	case CLOSING:
		__state_set(&ep->com, MORIBUND);
		disconnect = 0;
		break;
	case MORIBUND:
S
Steve Wise 已提交
2428
		(void)stop_ep_timer(ep);
2429 2430 2431 2432 2433
		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);
		}
2434
		close_complete_upcall(ep, 0);
2435 2436 2437 2438 2439 2440 2441 2442 2443 2444
		__state_set(&ep->com, DEAD);
		release = 1;
		disconnect = 0;
		break;
	case DEAD:
		disconnect = 0;
		break;
	default:
		BUG_ON(1);
	}
2445
	mutex_unlock(&ep->com.mutex);
2446 2447 2448 2449 2450 2451 2452 2453 2454 2455 2456 2457 2458 2459 2460 2461 2462 2463 2464 2465
	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);
2466
	if (is_neg_adv(req->status)) {
2467 2468 2469 2470 2471 2472
		PDBG("%s neg_adv_abort ep %p tid %u\n", __func__, ep,
		     ep->hwtid);
		return 0;
	}
	PDBG("%s ep %p tid %u state %u\n", __func__, ep, ep->hwtid,
	     ep->com.state);
2473
	set_bit(PEER_ABORT, &ep->com.history);
2474 2475 2476

	/*
	 * Wake up any threads in rdma_init() or rdma_fini().
2477 2478
	 * However, this is not needed if com state is just
	 * MPA_REQ_SENT
2479
	 */
2480 2481
	if (ep->com.state != MPA_REQ_SENT)
		c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
2482 2483

	mutex_lock(&ep->com.mutex);
2484 2485 2486 2487
	switch (ep->com.state) {
	case CONNECTING:
		break;
	case MPA_REQ_WAIT:
S
Steve Wise 已提交
2488
		(void)stop_ep_timer(ep);
2489 2490
		break;
	case MPA_REQ_SENT:
S
Steve Wise 已提交
2491
		(void)stop_ep_timer(ep);
2492
		if (mpa_rev == 1 || (mpa_rev == 2 && ep->tried_with_mpa_v1))
2493 2494 2495 2496 2497 2498 2499 2500 2501 2502 2503 2504 2505 2506
			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;
		}
2507 2508 2509 2510 2511 2512 2513
		break;
	case MPA_REP_SENT:
		break;
	case MPA_REQ_RCVD:
		break;
	case MORIBUND:
	case CLOSING:
2514
		stop_ep_timer(ep);
2515 2516 2517 2518 2519 2520 2521 2522 2523 2524 2525 2526 2527 2528 2529 2530 2531 2532
		/*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__);
2533
		mutex_unlock(&ep->com.mutex);
2534 2535 2536 2537 2538 2539 2540 2541
		return 0;
	default:
		BUG_ON(1);
		break;
	}
	dst_confirm(ep->dst);
	if (ep->com.state != ABORTING) {
		__state_set(&ep->com, DEAD);
2542 2543 2544
		/* we don't release if we want to retry with mpa_v1 */
		if (!ep->retry_with_mpa_v1)
			release = 1;
2545
	}
2546
	mutex_unlock(&ep->com.mutex);
2547 2548 2549 2550 2551 2552 2553 2554 2555 2556 2557 2558 2559 2560 2561 2562 2563

	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);
2564 2565
	else if (ep->retry_with_mpa_v1) {
		remove_handle(ep->com.dev, &ep->com.dev->hwtid_idr, ep->hwtid);
2566 2567 2568 2569 2570 2571
		cxgb4_remove_tid(ep->com.dev->rdev.lldi.tids, 0, ep->hwtid);
		dst_release(ep->dst);
		cxgb4_l2t_release(ep->l2t);
		c4iw_reconnect(ep);
	}

2572 2573 2574 2575 2576 2577 2578 2579 2580 2581 2582 2583 2584 2585 2586 2587 2588 2589
	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 */
2590
	mutex_lock(&ep->com.mutex);
2591 2592 2593 2594 2595
	switch (ep->com.state) {
	case CLOSING:
		__state_set(&ep->com, MORIBUND);
		break;
	case MORIBUND:
S
Steve Wise 已提交
2596
		(void)stop_ep_timer(ep);
2597 2598 2599 2600 2601 2602 2603
		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);
		}
2604
		close_complete_upcall(ep, 0);
2605 2606 2607 2608 2609 2610 2611 2612 2613 2614
		__state_set(&ep->com, DEAD);
		release = 1;
		break;
	case ABORTING:
	case DEAD:
		break;
	default:
		BUG_ON(1);
		break;
	}
2615
	mutex_unlock(&ep->com.mutex);
2616 2617 2618 2619 2620 2621 2622
	if (release)
		release_ep_resources(ep);
	return 0;
}

static int terminate(struct c4iw_dev *dev, struct sk_buff *skb)
{
2623
	struct cpl_rdma_terminate *rpl = cplhdr(skb);
2624
	struct tid_info *t = dev->rdev.lldi.tids;
2625 2626 2627
	unsigned int tid = GET_TID(rpl);
	struct c4iw_ep *ep;
	struct c4iw_qp_attributes attrs;
2628 2629

	ep = lookup_tid(t, tid);
2630
	BUG_ON(!ep);
2631

2632
	if (ep && ep->com.qp) {
2633 2634 2635 2636 2637 2638
		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
2639
		printk(KERN_WARNING MOD "TERM received tid %u no ep/qp\n", tid);
2640 2641 2642 2643 2644 2645 2646 2647 2648 2649 2650 2651 2652 2653 2654 2655 2656 2657 2658 2659 2660

	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) {
2661 2662
		PDBG("%s 0 credit ack ep %p tid %u state %u\n",
		     __func__, ep, ep->hwtid, state_read(&ep->com));
2663 2664 2665 2666 2667 2668 2669 2670 2671 2672 2673 2674 2675 2676 2677 2678
		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)
{
2679 2680
	int err = 0;
	int disconnect = 0;
2681 2682 2683
	struct c4iw_ep *ep = to_ep(cm_id);
	PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);

2684 2685 2686
	mutex_lock(&ep->com.mutex);
	if (ep->com.state == DEAD) {
		mutex_unlock(&ep->com.mutex);
2687 2688 2689
		c4iw_put_ep(&ep->com);
		return -ECONNRESET;
	}
2690
	set_bit(ULP_REJECT, &ep->com.history);
2691
	BUG_ON(ep->com.state != MPA_REQ_RCVD);
2692 2693 2694 2695
	if (mpa_rev == 0)
		abort_connection(ep, NULL, GFP_KERNEL);
	else {
		err = send_mpa_reject(ep, pdata, pdata_len);
2696
		disconnect = 1;
2697
	}
2698 2699 2700
	mutex_unlock(&ep->com.mutex);
	if (disconnect)
		err = c4iw_ep_disconnect(ep, 0, GFP_KERNEL);
2701 2702 2703 2704 2705 2706 2707 2708 2709 2710 2711 2712 2713 2714
	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);
2715 2716 2717

	mutex_lock(&ep->com.mutex);
	if (ep->com.state == DEAD) {
2718 2719 2720 2721
		err = -ECONNRESET;
		goto err;
	}

2722
	BUG_ON(ep->com.state != MPA_REQ_RCVD);
2723 2724
	BUG_ON(!qp);

2725
	set_bit(ULP_ACCEPT, &ep->com.history);
2726 2727
	if ((conn_param->ord > c4iw_max_read_depth) ||
	    (conn_param->ird > c4iw_max_read_depth)) {
2728 2729 2730 2731 2732
		abort_connection(ep, NULL, GFP_KERNEL);
		err = -EINVAL;
		goto err;
	}

2733 2734 2735 2736 2737 2738 2739 2740 2741 2742 2743 2744 2745 2746 2747 2748 2749 2750 2751
	if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) {
		if (conn_param->ord > ep->ird) {
			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;
		}
		if (conn_param->ird > ep->ord) {
			if (!ep->ord)
				conn_param->ird = 1;
			else {
				abort_connection(ep, NULL, GFP_KERNEL);
				err = -ENOMEM;
				goto err;
			}
		}
2752

2753
	}
2754 2755 2756
	ep->ird = conn_param->ird;
	ep->ord = conn_param->ord;

2757 2758 2759
	if (ep->mpa_attr.version != 2)
		if (peer2peer && ep->ird == 0)
			ep->ird = 1;
2760 2761 2762

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

2763 2764 2765
	cm_id->add_ref(cm_id);
	ep->com.cm_id = cm_id;
	ep->com.qp = qp;
2766
	ref_qp(ep);
2767

2768 2769 2770 2771 2772 2773 2774 2775 2776 2777 2778 2779 2780 2781 2782 2783 2784 2785 2786 2787 2788 2789 2790
	/* 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;

2791
	__state_set(&ep->com, FPDU_MODE);
2792
	established_upcall(ep);
2793
	mutex_unlock(&ep->com.mutex);
2794 2795 2796 2797 2798 2799
	c4iw_put_ep(&ep->com);
	return 0;
err1:
	ep->com.cm_id = NULL;
	cm_id->rem_ref(cm_id);
err:
2800
	mutex_unlock(&ep->com.mutex);
2801 2802 2803 2804
	c4iw_put_ep(&ep->com);
	return err;
}

2805 2806 2807 2808 2809 2810 2811 2812 2813 2814 2815 2816 2817 2818 2819 2820 2821 2822 2823 2824 2825 2826 2827 2828 2829 2830 2831 2832 2833 2834 2835 2836 2837 2838 2839 2840 2841 2842 2843 2844 2845 2846 2847 2848 2849 2850 2851 2852 2853 2854 2855 2856 2857 2858 2859 2860 2861 2862 2863 2864 2865
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;
}

2866 2867 2868 2869
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;
2870
	int err = 0;
2871 2872 2873 2874 2875 2876
	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;
2877 2878
	__u8 *ra;
	int iptype;
2879
	int iwpm_err = 0;
2880

2881 2882 2883 2884 2885
	if ((conn_param->ord > c4iw_max_read_depth) ||
	    (conn_param->ird > c4iw_max_read_depth)) {
		err = -EINVAL;
		goto out;
	}
2886 2887 2888 2889 2890 2891 2892 2893 2894 2895 2896 2897 2898 2899 2900 2901 2902 2903 2904 2905 2906
	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);
2907 2908 2909
	if (!ep->com.qp) {
		PDBG("%s qpn 0x%x not found!\n", __func__, conn_param->qpn);
		err = -EINVAL;
2910
		goto fail1;
2911
	}
2912
	ref_qp(ep);
2913 2914 2915 2916 2917 2918 2919 2920 2921 2922
	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;
2923
		goto fail1;
2924
	}
2925
	insert_handle(dev, &dev->atid_idr, ep, ep->atid);
2926

2927 2928 2929 2930 2931 2932 2933 2934 2935 2936 2937 2938 2939 2940 2941 2942 2943 2944 2945 2946 2947 2948 2949 2950 2951 2952 2953 2954 2955 2956 2957 2958 2959 2960 2961 2962 2963 2964 2965 2966
	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;

2967 2968 2969
	if (cm_id->remote_addr.ss_family == AF_INET) {
		iptype = 4;
		ra = (__u8 *)&raddr->sin_addr;
2970

2971 2972 2973 2974 2975 2976
		/*
		 * 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)
2977
				goto fail1;
2978 2979 2980 2981 2982 2983 2984 2985 2986 2987 2988 2989 2990 2991 2992 2993 2994 2995 2996
		}

		/* 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)
2997
				goto fail1;
2998 2999 3000 3001 3002 3003 3004 3005 3006 3007 3008 3009 3010
		}

		/* 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) {
3011 3012
		printk(KERN_ERR MOD "%s - cannot find route.\n", __func__);
		err = -EHOSTUNREACH;
3013
		goto fail2;
3014 3015
	}

3016
	err = import_ep(ep, iptype, ra, ep->dst, ep->com.dev, true);
3017
	if (err) {
3018
		printk(KERN_ERR MOD "%s - cannot alloc l2e.\n", __func__);
3019
		goto fail3;
3020 3021 3022 3023 3024 3025 3026 3027 3028 3029 3030 3031 3032 3033 3034 3035
	}

	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:
3036 3037
	dst_release(ep->dst);
fail2:
3038
	remove_handle(ep->com.dev, &ep->com.dev->atid_idr, ep->atid);
3039
	cxgb4_free_atid(ep->com.dev->rdev.lldi.tids, ep->atid);
3040
fail1:
3041 3042 3043 3044 3045 3046
	cm_id->rem_ref(cm_id);
	c4iw_put_ep(&ep->com);
out:
	return err;
}

3047 3048 3049
static int create_server6(struct c4iw_dev *dev, struct c4iw_listen_ep *ep)
{
	int err;
3050 3051
	struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)
				    &ep->com.mapped_local_addr;
3052 3053 3054 3055 3056 3057 3058 3059 3060 3061 3062 3063 3064 3065 3066 3067 3068 3069 3070 3071

	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;
3072 3073
	struct sockaddr_in *sin = (struct sockaddr_in *)
				  &ep->com.mapped_local_addr;
3074 3075 3076 3077 3078 3079 3080 3081 3082 3083 3084 3085 3086 3087 3088 3089 3090 3091 3092 3093 3094 3095 3096 3097 3098 3099 3100 3101 3102

	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;
}

3103 3104 3105 3106 3107
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;
3108 3109 3110
	struct iwpm_dev_data pm_reg_msg;
	struct iwpm_sa_data pm_msg;
	int iwpm_err = 0;
3111 3112 3113 3114 3115 3116 3117 3118 3119 3120 3121 3122 3123 3124

	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;
3125 3126
	memcpy(&ep->com.local_addr, &cm_id->local_addr,
	       sizeof(ep->com.local_addr));
3127 3128 3129 3130

	/*
	 * Allocate a server TID.
	 */
3131 3132
	if (dev->rdev.lldi.enable_fw_ofld_conn &&
	    ep->com.local_addr.ss_family == AF_INET)
3133 3134
		ep->stid = cxgb4_alloc_sftid(dev->rdev.lldi.tids,
					     cm_id->local_addr.ss_family, ep);
3135
	else
3136 3137
		ep->stid = cxgb4_alloc_stid(dev->rdev.lldi.tids,
					    cm_id->local_addr.ss_family, ep);
3138

3139
	if (ep->stid == -1) {
3140
		printk(KERN_ERR MOD "%s - cannot alloc stid.\n", __func__);
3141 3142 3143
		err = -ENOMEM;
		goto fail2;
	}
3144
	insert_handle(dev, &dev->stid_idr, ep, ep->stid);
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 3170 3171 3172 3173 3174 3175

	/* 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);
3176
	state_set(&ep->com, LISTEN);
3177 3178 3179 3180
	if (ep->com.local_addr.ss_family == AF_INET)
		err = create_server4(dev, ep);
	else
		err = create_server6(dev, ep);
3181 3182 3183 3184
	if (!err) {
		cm_id->provider_data = ep;
		goto out;
	}
3185 3186

fail3:
3187 3188
	cxgb4_free_stid(ep->com.dev->rdev.lldi.tids, ep->stid,
			ep->com.local_addr.ss_family);
3189 3190 3191 3192 3193 3194 3195 3196 3197 3198 3199 3200 3201 3202 3203 3204 3205
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);
3206 3207
	if (ep->com.dev->rdev.lldi.enable_fw_ofld_conn &&
	    ep->com.local_addr.ss_family == AF_INET) {
3208 3209 3210 3211 3212
		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);
3213 3214 3215
		err = cxgb4_remove_server(
				ep->com.dev->rdev.lldi.ports[0], ep->stid,
				ep->com.dev->rdev.lldi.rxq_ids[0], 0);
3216 3217 3218 3219 3220
		if (err)
			goto done;
		err = c4iw_wait_for_reply(&ep->com.dev->rdev, &ep->com.wr_wait,
					  0, 0, __func__);
	}
3221
	remove_handle(ep->com.dev, &ep->com.dev->stid_idr, ep->stid);
3222 3223
	cxgb4_free_stid(ep->com.dev->rdev.lldi.tids, ep->stid,
			ep->com.local_addr.ss_family);
3224 3225 3226 3227 3228 3229 3230 3231 3232 3233 3234 3235 3236
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;

3237
	mutex_lock(&ep->com.mutex);
3238 3239 3240 3241 3242 3243 3244

	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;
3245
		close_complete_upcall(ep, -EIO);
3246 3247 3248 3249 3250 3251 3252 3253 3254 3255 3256 3257 3258
		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;
3259
			start_ep_timer(ep);
3260 3261 3262 3263 3264 3265 3266
		}
		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
3267
				(void)stop_ep_timer(ep);
3268 3269 3270 3271 3272 3273 3274 3275 3276 3277 3278 3279 3280 3281 3282 3283 3284
				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
3285
		if (abrupt) {
3286
			set_bit(EP_DISC_ABORT, &ep->com.history);
3287
			close_complete_upcall(ep, -ECONNRESET);
S
Steve Wise 已提交
3288
			ret = send_abort(ep, NULL, gfp);
3289 3290
		} else {
			set_bit(EP_DISC_CLOSE, &ep->com.history);
3291
			ret = send_halfclose(ep, gfp);
3292
		}
3293 3294 3295
		if (ret)
			fatal = 1;
	}
S
Steve Wise 已提交
3296
	mutex_unlock(&ep->com.mutex);
3297 3298 3299 3300 3301
	if (fatal)
		release_ep_resources(ep);
	return ret;
}

3302 3303 3304 3305
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;
3306
	int atid = be32_to_cpu(req->tid);
3307

3308 3309
	ep = (struct c4iw_ep *)lookup_atid(dev->rdev.lldi.tids,
					   (__force u32) req->tid);
3310 3311 3312 3313 3314
	if (!ep)
		return;

	switch (req->retval) {
	case FW_ENOMEM:
3315 3316 3317 3318 3319
		set_bit(ACT_RETRY_NOMEM, &ep->com.history);
		if (ep->retry_count++ < ACT_OPEN_RETRY_COUNT) {
			send_fw_act_open_req(ep, atid);
			return;
		}
3320
	case FW_EADDRINUSE:
3321 3322 3323 3324 3325
		set_bit(ACT_RETRY_INUSE, &ep->com.history);
		if (ep->retry_count++ < ACT_OPEN_RETRY_COUNT) {
			send_fw_act_open_req(ep, atid);
			return;
		}
3326 3327 3328 3329 3330 3331
		break;
	default:
		pr_info("%s unexpected ofld conn wr retval %d\n",
		       __func__, req->retval);
		break;
	}
3332 3333 3334 3335 3336
	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);
3337
	connect_reply_upcall(ep, status2errno(req->retval));
3338 3339 3340 3341 3342 3343
	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);
3344 3345 3346 3347 3348 3349 3350 3351 3352
}

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;

3353
	rpl_skb = (struct sk_buff *)(unsigned long)req->cookie;
3354 3355 3356
	BUG_ON(!rpl_skb);
	if (req->retval) {
		PDBG("%s passive open failure %d\n", __func__, req->retval);
3357 3358 3359
		mutex_lock(&dev->rdev.stats.lock);
		dev->rdev.stats.pas_ofld_conn_fails++;
		mutex_unlock(&dev->rdev.stats.lock);
3360 3361 3362 3363
		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,
3364 3365
					(__force u32) htonl(
					(__force u32) req->tid)));
3366 3367 3368 3369 3370 3371 3372 3373
		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)
3374 3375
{
	struct cpl_fw6_msg *rpl = cplhdr(skb);
3376 3377 3378 3379 3380 3381 3382 3383 3384 3385 3386 3387 3388 3389 3390 3391 3392 3393 3394 3395 3396 3397 3398 3399 3400 3401 3402 3403
	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;
3404
	u16 vlantag, len, hdr_len, eth_hdr_len;
3405 3406 3407 3408
	u8 intf;
	struct cpl_rx_pkt *cpl = cplhdr(skb);
	struct cpl_pass_accept_req *req;
	struct tcp_options_received tmp_opt;
3409
	struct c4iw_dev *dev;
3410

3411
	dev = *((struct c4iw_dev **) (skb->cb + sizeof(void *)));
3412
	/* Store values from cpl_rx_pkt in temporary location. */
3413 3414 3415 3416
	vlantag = (__force u16) cpl->vlan;
	len = (__force u16) cpl->len;
	l2info  = (__force u32) cpl->l2info;
	hdr_len = (__force u16) cpl->hdr_len;
3417 3418 3419 3420 3421 3422 3423 3424 3425 3426
	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
3427
	tcp_parse_options(skb, &tmp_opt, 0, NULL);
3428 3429 3430 3431

	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) |
3432 3433
			 V_SYN_MAC_IDX(G_RX_MACIDX(
			 (__force int) htonl(l2info))) |
3434
			 F_SYN_XACT_MATCH);
3435 3436 3437
	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));
3438 3439 3440 3441 3442 3443
	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))) |
3444
				   V_ETH_HDR_LEN(G_RX_ETHHDR_LEN(eth_hdr_len)));
3445 3446
	req->vlan = (__force __be16) vlantag;
	req->len = (__force __be16) len;
3447 3448 3449 3450 3451 3452 3453 3454 3455 3456 3457 3458 3459 3460 3461 3462 3463 3464 3465 3466 3467
	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);
3468
	int ret;
3469 3470 3471 3472 3473 3474 3475

	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));
	req->op_compl = htonl(V_WR_OP(FW_OFLD_CONNECTION_WR) | FW_WR_COMPL(1));
	req->len16_pkd = htonl(FW_WR_LEN16(DIV_ROUND_UP(sizeof(*req), 16)));
	req->le.version_cpl = htonl(F_FW_OFLD_CONNECTION_WR_CPL);
3476
	req->le.filter = (__force __be32) filter;
3477 3478 3479 3480 3481 3482 3483 3484 3485 3486 3487 3488 3489 3490 3491 3492 3493 3494 3495 3496 3497 3498 3499 3500 3501
	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));
3502
	req->cookie = (unsigned long)skb;
3503 3504

	set_wr_txq(req_skb, CPL_PRIORITY_CONTROL, port_id);
3505 3506 3507 3508 3509 3510 3511
	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);
	}
3512 3513 3514 3515 3516 3517 3518 3519 3520 3521 3522 3523 3524 3525 3526 3527 3528 3529 3530 3531 3532 3533 3534 3535 3536 3537
}

/*
 * 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;
3538
	u16 rss_qid, eth_hdr_len;
3539 3540 3541 3542 3543 3544 3545 3546 3547 3548 3549 3550 3551 3552 3553 3554 3555 3556
	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.
	 */
3557
	stid = (__force int) cpu_to_be32((__force u32) rss->hash_val);
3558 3559 3560 3561 3562 3563 3564

	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;
	}

3565 3566 3567 3568
	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) {
3569 3570 3571 3572 3573 3574 3575 3576 3577 3578 3579 3580 3581 3582 3583 3584 3585 3586 3587 3588
		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);

3589 3590 3591
	dst = find_route(dev, iph->daddr, iph->saddr, tcph->dest, tcph->source,
			 iph->tos);
	if (!dst) {
3592 3593 3594 3595 3596 3597
		pr_err("%s - failed to find dst entry!\n",
		       __func__);
		goto reject;
	}
	neigh = dst_neigh_lookup_skb(dst, skb);

3598 3599 3600 3601 3602 3603
	if (!neigh) {
		pr_err("%s - failed to allocate neigh!\n",
		       __func__);
		goto free_dst;
	}

3604 3605 3606 3607 3608 3609 3610 3611
	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 {
3612
		pdev = get_real_dev(neigh->dev);
3613
		e = cxgb4_l2t_get(dev->rdev.lldi.l2t, neigh,
3614 3615 3616
					pdev, 0);
		pi = (struct port_info *)netdev_priv(pdev);
		tx_chan = cxgb4_port_chan(pdev);
3617
	}
3618
	neigh_release(neigh);
3619 3620 3621 3622 3623 3624 3625 3626
	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];
3627
	window = (__force u16) htons((__force u16)tcph->window);
3628 3629

	/* Calcuate filter portion for LE region. */
3630 3631 3632
	filter = (__force unsigned int) cpu_to_be32(cxgb4_select_ntuple(
						    dev->rdev.lldi.ports[0],
						    e));
3633 3634 3635 3636 3637 3638 3639 3640 3641 3642 3643 3644 3645 3646

	/*
	 * 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:
3647 3648 3649
	return 0;
}

3650 3651 3652 3653 3654 3655 3656 3657 3658 3659 3660 3661 3662 3663 3664 3665 3666 3667
/*
 * 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,
3668
	[CPL_FW4_ACK] = fw4_ack,
3669 3670
	[CPL_FW6_MSG] = deferred_fw6_msg,
	[CPL_RX_PKT] = rx_pkt
3671 3672 3673 3674 3675 3676 3677
};

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

3678
	mutex_lock(&ep->com.mutex);
3679 3680
	PDBG("%s ep %p tid %u state %d\n", __func__, ep, ep->hwtid,
	     ep->com.state);
3681
	set_bit(TIMEDOUT, &ep->com.history);
3682 3683 3684 3685 3686 3687 3688 3689 3690 3691 3692 3693 3694 3695 3696 3697 3698
	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);
3699
		close_complete_upcall(ep, -ETIMEDOUT);
3700
		break;
S
Steve Wise 已提交
3701 3702 3703 3704 3705 3706 3707 3708 3709 3710
	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;
3711
	default:
J
Julia Lawall 已提交
3712
		WARN(1, "%s unexpected state ep %p tid %u state %u\n",
3713 3714 3715 3716 3717
			__func__, ep, ep->hwtid, ep->com.state);
		abort = 0;
	}
	if (abort)
		abort_connection(ep, NULL, GFP_KERNEL);
3718
	mutex_unlock(&ep->com.mutex);
3719 3720 3721 3722 3723 3724 3725 3726 3727 3728 3729 3730 3731
	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
3732 3733
		tmp->next = NULL;
		tmp->prev = NULL;
3734 3735 3736 3737 3738 3739 3740 3741 3742 3743 3744 3745
		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;
3746
	struct cpl_act_establish *rpl;
3747 3748 3749
	unsigned int opcode;
	int ret;

S
Steve Wise 已提交
3750
	process_timedout_eps();
3751 3752 3753 3754 3755 3756 3757 3758 3759
	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
3760
		process_timedout_eps();
3761 3762 3763 3764 3765 3766 3767 3768
	}
}

static DECLARE_WORK(skb_work, process_work);

static void ep_timeout(unsigned long arg)
{
	struct c4iw_ep *ep = (struct c4iw_ep *)arg;
3769
	int kickit = 0;
3770 3771

	spin_lock(&timeout_lock);
3772
	if (!test_and_set_bit(TIMEOUT, &ep->com.flags)) {
S
Steve Wise 已提交
3773 3774 3775 3776 3777 3778 3779
		/*
		 * Only insert if it is not already on the list.
		 */
		if (!ep->entry.next) {
			list_add_tail(&ep->entry, &timeout_list);
			kickit = 1;
		}
3780
	}
3781
	spin_unlock(&timeout_lock);
3782 3783
	if (kickit)
		queue_work(workq, &skb_work);
3784 3785
}

3786 3787 3788 3789 3790 3791 3792 3793 3794 3795 3796 3797 3798 3799 3800 3801 3802 3803 3804 3805 3806 3807 3808 3809 3810 3811 3812
/*
 * 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));
	}
3813
	kfree_skb(skb);
3814 3815 3816
	return 0;
}

3817 3818 3819 3820 3821 3822 3823 3824 3825
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) {
3826
	case FW6_TYPE_WR_RPL:
3827
		ret = (int)((be64_to_cpu(rpl->data[0]) >> 8) & 0xff);
3828
		wr_waitp = (struct c4iw_wr_wait *)(__force unsigned long) rpl->data[1];
3829
		PDBG("%s wr_waitp %p ret %u\n", __func__, wr_waitp, ret);
3830 3831
		if (wr_waitp)
			c4iw_wake_up(wr_waitp, ret ? -ret : 0);
3832
		kfree_skb(skb);
3833
		break;
3834 3835
	case FW6_TYPE_CQE:
	case FW6_TYPE_OFLD_CONNECTION_WR_RPL:
3836
		sched(dev, skb);
3837
		break;
3838 3839 3840
	default:
		printk(KERN_ERR MOD "%s unexpected fw6 msg type %u\n", __func__,
		       rpl->type);
3841
		kfree_skb(skb);
3842 3843 3844 3845 3846
		break;
	}
	return 0;
}

S
Steve Wise 已提交
3847 3848 3849 3850 3851 3852 3853 3854
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);
3855 3856 3857 3858 3859 3860
	if (!ep) {
		printk(KERN_WARNING MOD
		       "Abort on non-existent endpoint, tid %d\n", tid);
		kfree_skb(skb);
		return 0;
	}
3861
	if (is_neg_adv(req->status)) {
S
Steve Wise 已提交
3862 3863 3864 3865 3866 3867 3868 3869 3870 3871
		PDBG("%s neg_adv_abort ep %p tid %u\n", __func__, ep,
		     ep->hwtid);
		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().
3872 3873
	 * However, if we are on MPAv2 and want to retry with MPAv1
	 * then, don't wake up yet.
S
Steve Wise 已提交
3874
	 */
3875 3876 3877 3878 3879
	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
3880 3881 3882 3883
	sched(dev, skb);
	return 0;
}

3884 3885 3886 3887 3888 3889 3890 3891 3892 3893 3894 3895 3896 3897 3898 3899
/*
 * 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
3900
	[CPL_ABORT_REQ_RSS] = peer_abort_intr,
3901 3902 3903
	[CPL_RDMA_TERMINATE] = sched,
	[CPL_FW4_ACK] = sched,
	[CPL_SET_TCB_RPL] = set_tcb_rpl,
3904 3905
	[CPL_FW6_MSG] = fw6_msg,
	[CPL_RX_PKT] = sched
3906 3907
};

3908 3909
int __init c4iw_cm_init(void)
{
3910
	spin_lock_init(&timeout_lock);
3911 3912 3913 3914 3915 3916 3917 3918 3919 3920 3921
	skb_queue_head_init(&rxq);

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

	return 0;
}

void __exit c4iw_cm_term(void)
{
3922
	WARN_ON(!list_empty(&timeout_list));
3923 3924 3925
	flush_workqueue(workq);
	destroy_workqueue(workq);
}