cm.c 99.7 KB
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/*
 * Copyright (c) 2009-2010 Chelsio, Inc. All rights reserved.
 *
 * This software is available to you under a choice of one of two
 * licenses.  You may choose to be licensed under the terms of the GNU
 * General Public License (GPL) Version 2, available from the file
 * COPYING in the main directory of this source tree, or the
 * OpenIB.org BSD license below:
 *
 *     Redistribution and use in source and binary forms, with or
 *     without modification, are permitted provided that the following
 *     conditions are met:
 *
 *      - Redistributions of source code must retain the above
 *	  copyright notice, this list of conditions and the following
 *	  disclaimer.
 *
 *      - Redistributions in binary form must reproduce the above
 *	  copyright notice, this list of conditions and the following
 *	  disclaimer in the documentation and/or other materials
 *	  provided with the distribution.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */
#include <linux/module.h>
#include <linux/list.h>
#include <linux/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 "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)");

static int peer2peer;
module_param(peer2peer, int, 0644);
MODULE_PARM_DESC(peer2peer, "Support peer2peer ULPs (default=0)");

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);
}

static void stop_ep_timer(struct c4iw_ep *ep)
{
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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))
		c4iw_put_ep(&ep->com);
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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)
{
	ep->emss = ep->com.dev->rdev.lldi.mtus[GET_TCPOPT_MSS(opt)] - 40;
	ep->mss = ep->emss;
	if (GET_TCPOPT_TSTAMP(opt))
		ep->emss -= 12;
	if (ep->emss < 128)
		ep->emss = 128;
	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);
	}
	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)
{
	struct net_device *phys_dev = egress_dev;
	if (egress_dev->priv_flags & IFF_802_1Q_VLAN)
		phys_dev = vlan_dev_real_dev(egress_dev);
	return phys_dev;
}

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;
	if (!our_interface(dev, n->dev)) {
		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;
	flowc->mnemval[6].val = cpu_to_be32(snd_win);
	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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#define VLAN_NONE 0xfff
#define FILTER_SEL_VLAN_NONE 0xffff
#define FILTER_SEL_WIDTH_P_FC (3+1) /* port uses 3 bits, FCoE one bit */
#define FILTER_SEL_WIDTH_VIN_P_FC \
	(6 + 7 + FILTER_SEL_WIDTH_P_FC) /* 6 bits are unused, VF uses 7 bits*/
#define FILTER_SEL_WIDTH_TAG_P_FC \
	(3 + FILTER_SEL_WIDTH_VIN_P_FC) /* PF uses 3 bits */
#define FILTER_SEL_WIDTH_VLD_TAG_P_FC (1 + FILTER_SEL_WIDTH_TAG_P_FC)

static unsigned int select_ntuple(struct c4iw_dev *dev, struct dst_entry *dst,
				  struct l2t_entry *l2t)
{
	unsigned int ntuple = 0;
	u32 viid;

	switch (dev->rdev.lldi.filt_mode) {

	/* default filter mode */
	case HW_TPL_FR_MT_PR_IV_P_FC:
		if (l2t->vlan == VLAN_NONE)
			ntuple |= FILTER_SEL_VLAN_NONE << FILTER_SEL_WIDTH_P_FC;
		else {
			ntuple |= l2t->vlan << FILTER_SEL_WIDTH_P_FC;
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			ntuple |= 1 << FILTER_SEL_WIDTH_TAG_P_FC;
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		}
		ntuple |= l2t->lport << S_PORT | IPPROTO_TCP <<
			  FILTER_SEL_WIDTH_VLD_TAG_P_FC;
		break;
	case HW_TPL_FR_MT_PR_OV_P_FC: {
		viid = cxgb4_port_viid(l2t->neigh->dev);

		ntuple |= FW_VIID_VIN_GET(viid) << FILTER_SEL_WIDTH_P_FC;
		ntuple |= FW_VIID_PFN_GET(viid) << FILTER_SEL_WIDTH_VIN_P_FC;
		ntuple |= FW_VIID_VIVLD_GET(viid) << FILTER_SEL_WIDTH_TAG_P_FC;
		ntuple |= l2t->lport << S_PORT | IPPROTO_TCP <<
			  FILTER_SEL_WIDTH_VLD_TAG_P_FC;
		break;
	}
	default:
		break;
	}
	return ntuple;
}

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static int send_connect(struct c4iw_ep *ep)
{
	struct cpl_act_open_req *req;
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	struct cpl_t5_act_open_req *t5_req;
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	struct cpl_act_open_req6 *req6;
	struct cpl_t5_act_open_req6 *t5_req6;
577 578 579 580 581
	struct sk_buff *skb;
	u64 opt0;
	u32 opt2;
	unsigned int mtu_idx;
	int wscale;
582 583 584 585 586 587 588 589 590 591 592 593 594 595 596
	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);
	struct sockaddr_in *la = (struct sockaddr_in *)&ep->com.local_addr;
	struct sockaddr_in *ra = (struct sockaddr_in *)&ep->com.remote_addr;
	struct sockaddr_in6 *la6 = (struct sockaddr_in6 *)&ep->com.local_addr;
	struct sockaddr_in6 *ra6 = (struct sockaddr_in6 *)&ep->com.remote_addr;

	wrlen = (ep->com.remote_addr.ss_family == AF_INET) ?
			roundup(sizev4, 16) :
			roundup(sizev6, 16);
597 598 599 600 601 602 603 604 605

	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
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	set_wr_txq(skb, CPL_PRIORITY_SETUP, ep->ctrlq_idx);
607 608 609

	cxgb4_best_mtu(ep->com.dev->rdev.lldi.mtus, ep->mtu, &mtu_idx);
	wscale = compute_wscale(rcv_win);
610 611
	opt0 = (nocong ? NO_CONG(1) : 0) |
	       KEEP_ALIVE(1) |
612
	       DELACK(1) |
613 614 615 616 617 618
	       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
619
	       ULP_MODE(ULP_MODE_TCPDDP) |
620 621
	       RCV_BUFSIZ(rcv_win>>10);
	opt2 = RX_CHANNEL(0) |
622
	       CCTRL_ECN(enable_ecn) |
623 624 625 626 627 628 629 630 631
	       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);
	t4_set_arp_err_handler(skb, NULL, act_open_req_arp_failure);

632
	if (is_t4(ep->com.dev->rdev.lldi.adapter_type)) {
633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669
		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);
			req->params = cpu_to_be32(select_ntuple(ep->com.dev,
						ep->dst, ep->l2t));
			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);
			req6->params = cpu_to_be32(
					select_ntuple(ep->com.dev, ep->dst,
						      ep->l2t));
			req6->opt2 = cpu_to_be32(opt2);
		}
670
	} else {
671 672 673 674 675
		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(
676 677
					MK_OPCODE_TID(CPL_ACT_OPEN_REQ,
					((ep->rss_qid << 14) | ep->atid)));
678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708
			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(
						select_ntuple(ep->com.dev,
						ep->dst, ep->l2t)));
			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(
				select_ntuple(ep->com.dev, ep->dst, ep->l2t));
			t5_req6->opt2 = cpu_to_be32(opt2);
		}
709 710
	}

711
	set_bit(ACT_OPEN_REQ, &ep->com.history);
712 713 714
	return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
}

715 716
static void send_mpa_req(struct c4iw_ep *ep, struct sk_buff *skb,
		u8 mpa_rev_to_use)
717 718 719 720
{
	int mpalen, wrlen;
	struct fw_ofld_tx_data_wr *req;
	struct mpa_message *mpa;
721
	struct mpa_v2_conn_params mpa_v2_params;
722 723 724 725 726 727

	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;
728 729
	if (mpa_rev_to_use == 2)
		mpalen += sizeof(struct mpa_v2_conn_params);
730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754
	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) |
755 756
		     (markers_enabled ? MPA_MARKERS : 0) |
		     (mpa_rev_to_use == 2 ? MPA_ENHANCED_RDMA_CONN : 0);
757
	mpa->private_data_size = htons(ep->plen);
758
	mpa->revision = mpa_rev_to_use;
759
	if (mpa_rev_to_use == 1) {
760
		ep->tried_with_mpa_v1 = 1;
761 762
		ep->retry_with_mpa_v1 = 0;
	}
763 764

	if (mpa_rev_to_use == 2) {
765 766
		mpa->private_data_size = htons(ntohs(mpa->private_data_size) +
					       sizeof (struct mpa_v2_conn_params));
767 768 769 770 771 772 773 774 775 776 777 778 779 780
		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));
781

782 783 784 785 786 787 788 789
		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);
790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812

	/*
	 * 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);
	state_set(&ep->com, MPA_REQ_SENT);
	ep->mpa_attr.initiator = 1;
	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;
813
	struct mpa_v2_conn_params mpa_v2_params;
814 815 816 817

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

	mpalen = sizeof(*mpa) + plen;
818 819
	if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn)
		mpalen += sizeof(struct mpa_v2_conn_params);
820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846
	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;
847
	mpa->revision = ep->mpa_attr.version;
848
	mpa->private_data_size = htons(plen);
849 850 851

	if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) {
		mpa->flags |= MPA_ENHANCED_RDMA_CONN;
852 853
		mpa->private_data_size = htons(ntohs(mpa->private_data_size) +
					       sizeof (struct mpa_v2_conn_params));
854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871
		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);
872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891

	/*
	 * 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;
	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;
892
	struct mpa_v2_conn_params mpa_v2_params;
893 894 895 896

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

	mpalen = sizeof(*mpa) + plen;
897 898
	if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn)
		mpalen += sizeof(struct mpa_v2_conn_params);
899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926
	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);
927
	mpa->revision = ep->mpa_attr.version;
928
	mpa->private_data_size = htons(plen);
929 930 931

	if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) {
		mpa->flags |= MPA_ENHANCED_RDMA_CONN;
932 933
		mpa->private_data_size = htons(ntohs(mpa->private_data_size) +
					       sizeof (struct mpa_v2_conn_params));
934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956
		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);
957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987

	/*
	 * 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;
	state_set(&ep->com, MPA_REP_SENT);
	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));

	dst_confirm(ep->dst);

	/* setup the hwtid for this connection */
	ep->hwtid = tid;
	cxgb4_insert_tid(t, ep, tid);
988
	insert_handle(dev, &dev->hwtid_idr, ep, ep->hwtid);
989 990 991 992 993 994 995

	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 */
996
	remove_handle(ep->com.dev, &ep->com.dev->atid_idr, atid);
997
	cxgb4_free_atid(t, atid);
998
	set_bit(ACT_ESTAB, &ep->com.history);
999 1000 1001

	/* start MPA negotiation */
	send_flowc(ep, NULL);
1002 1003 1004 1005
	if (ep->retry_with_mpa_v1)
		send_mpa_req(ep, skb, 1);
	else
		send_mpa_req(ep, skb, mpa_rev);
1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022

	return 0;
}

static void close_complete_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;
	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;
1023
		set_bit(CLOSE_UPCALL, &ep->com.history);
1024 1025 1026 1027 1028 1029 1030 1031
	}
}

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);
	close_complete_upcall(ep);
	state_set(&ep->com, ABORTING);
1032
	set_bit(ABORT_CONN, &ep->com.history);
1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046
	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);
1047
		set_bit(DISCONN_UPCALL, &ep->com.history);
1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064
	}
}

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;
1065
		set_bit(ABORT_UPCALL, &ep->com.history);
1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076
	}
}

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;
1077 1078 1079 1080
	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));
1081 1082

	if ((status == 0) || (status == -ECONNREFUSED)) {
1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095
		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);
		}
1096
	}
1097 1098 1099

	PDBG("%s ep %p tid %u status %d\n", __func__, ep,
	     ep->hwtid, status);
1100
	set_bit(CONN_RPL_UPCALL, &ep->com.history);
1101 1102
	ep->com.cm_id->event_handler(ep->com.cm_id, &event);

1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115
	if (status < 0) {
		ep->com.cm_id->rem_ref(ep->com.cm_id);
		ep->com.cm_id = NULL;
	}
}

static void connect_request_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_CONNECT_REQUEST;
1116 1117 1118 1119
	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));
1120
	event.provider_data = ep;
1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135
	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);
	}
1136 1137 1138 1139 1140 1141
	if (state_read(&ep->parent_ep->com) != DEAD) {
		c4iw_get_ep(&ep->com);
		ep->parent_ep->com.cm_id->event_handler(
						ep->parent_ep->com.cm_id,
						&event);
	}
1142
	set_bit(CONNREQ_UPCALL, &ep->com.history);
1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153
	c4iw_put_ep(&ep->parent_ep->com);
	ep->parent_ep = NULL;
}

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;
1154 1155
	event.ird = ep->ird;
	event.ord = ep->ord;
1156 1157 1158
	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);
1159
		set_bit(ESTAB_UPCALL, &ep->com.history);
1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180
	}
}

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;
	}

	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));
1181 1182 1183
	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
1184
	set_wr_txq(skb, CPL_PRIORITY_ACK, ep->ctrlq_idx);
1185 1186 1187 1188 1189 1190 1191
	c4iw_ofld_send(&ep->com.dev->rdev, skb);
	return credits;
}

static void process_mpa_reply(struct c4iw_ep *ep, struct sk_buff *skb)
{
	struct mpa_message *mpa;
1192
	struct mpa_v2_conn_params *mpa_v2_params;
1193
	u16 plen;
1194 1195
	u16 resp_ird, resp_ord;
	u8 rtr_mismatch = 0, insuff_ird = 0;
1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234
	struct c4iw_qp_attributes attrs;
	enum c4iw_qp_attr_mask mask;
	int err;

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

	/*
	 * Stop mpa timer.  If it expired, then the state has
	 * changed and we bail since ep_timeout already aborted
	 * the connection.
	 */
	stop_ep_timer(ep);
	if (state_read(&ep->com) != MPA_REQ_SENT)
		return;

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

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

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

	/* Validate MPA header. */
1235 1236 1237
	if (mpa->revision > mpa_rev) {
		printk(KERN_ERR MOD "%s MPA version mismatch. Local = %d,"
		       " Received = %d\n", __func__, mpa_rev, mpa->revision);
1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286
		err = -EPROTO;
		goto err;
	}
	if (memcmp(mpa->key, MPA_KEY_REP, sizeof(mpa->key))) {
		err = -EPROTO;
		goto err;
	}

	plen = ntohs(mpa->private_data_size);

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

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

	ep->plen = (u8) plen;

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

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

	/*
	 * If we get here we have accumulated the entire mpa
	 * start reply message including private data. And
	 * the MPA header is valid.
	 */
	state_set(&ep->com, FPDU_MODE);
	ep->mpa_attr.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;
1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 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
	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;

1329
	PDBG("%s - crc_enabled=%d, recv_marker_enabled=%d, "
1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341
	     "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
	 */
1342
	if ((ep->mpa_attr.version == 2) && peer2peer &&
1343 1344 1345 1346
			(ep->mpa_attr.p2p_type != p2p_type)) {
		ep->mpa_attr.p2p_type = FW_RI_INIT_P2PTYPE_DISABLED;
		rtr_mismatch = 1;
	}
1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362

	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;
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 1389 1390 1391 1392 1393 1394 1395

	/*
	 * 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;
		err = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
				C4IW_QP_ATTR_NEXT_STATE, &attrs, 0);
		err = -ENOMEM;
		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;
		err = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
				C4IW_QP_ATTR_NEXT_STATE, &attrs, 0);
		err = -ENOMEM;
		goto out;
	}
1396 1397
	goto out;
err:
1398 1399
	state_set(&ep->com, ABORTING);
	send_abort(ep, skb, GFP_KERNEL);
1400 1401 1402 1403 1404 1405 1406 1407
out:
	connect_reply_upcall(ep, err);
	return;
}

static void process_mpa_request(struct c4iw_ep *ep, struct sk_buff *skb)
{
	struct mpa_message *mpa;
1408
	struct mpa_v2_conn_params *mpa_v2_params;
1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448
	u16 plen;

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

	if (state_read(&ep->com) != MPA_REQ_WAIT)
		return;

	/*
	 * If we get more than the supported amount of private data
	 * then we must fail this connection.
	 */
	if (ep->mpa_pkt_len + skb->len > sizeof(ep->mpa_pkt)) {
		stop_ep_timer(ep);
		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__);
	stop_ep_timer(ep);
	mpa = (struct mpa_message *) ep->mpa_pkt;

	/*
	 * Validate MPA Header.
	 */
1449 1450 1451
	if (mpa->revision > mpa_rev) {
		printk(KERN_ERR MOD "%s MPA version mismatch. Local = %d,"
		       " Received = %d\n", __func__, mpa_rev, mpa->revision);
1452
		stop_ep_timer(ep);
1453 1454 1455 1456 1457
		abort_connection(ep, skb, GFP_KERNEL);
		return;
	}

	if (memcmp(mpa->key, MPA_KEY_REQ, sizeof(mpa->key))) {
1458
		stop_ep_timer(ep);
1459 1460 1461 1462 1463 1464 1465 1466 1467 1468
		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) {
1469
		stop_ep_timer(ep);
1470 1471 1472 1473 1474 1475 1476 1477
		abort_connection(ep, skb, GFP_KERNEL);
		return;
	}

	/*
	 * If plen does not account for pkt size
	 */
	if (ep->mpa_pkt_len > (sizeof(*mpa) + plen)) {
1478
		stop_ep_timer(ep);
1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497
		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;
1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528
	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;

1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548
	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);

	state_set(&ep->com, MPA_REQ_RCVD);

	/* drive upcall */
	connect_request_upcall(ep);
	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;
1549
	__u8 status = hdr->status;
1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560

	ep = lookup_tid(t, tid);
	PDBG("%s ep %p tid %u dlen %u\n", __func__, ep, ep->hwtid, dlen);
	skb_pull(skb, sizeof(*hdr));
	skb_trim(skb, dlen);

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

	switch (state_read(&ep->com)) {
	case MPA_REQ_SENT:
1561
		ep->rcv_seq += dlen;
1562 1563 1564
		process_mpa_reply(ep, skb);
		break;
	case MPA_REQ_WAIT:
1565
		ep->rcv_seq += dlen;
1566 1567
		process_mpa_request(ep, skb);
		break;
1568 1569 1570
	case FPDU_MODE: {
		struct c4iw_qp_attributes attrs;
		BUG_ON(!ep->com.qp);
1571
		if (status)
1572
			pr_err("%s Unexpected streaming data." \
1573 1574 1575
			       " qpid %u ep %p state %d tid %u status %d\n",
			       __func__, ep->com.qp->wq.sq.qid, ep,
			       state_read(&ep->com), ep->hwtid, status);
1576
		attrs.next_state = C4IW_QP_STATE_TERMINATE;
1577
		c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
1578
			       C4IW_QP_ATTR_NEXT_STATE, &attrs, 0);
1579 1580
		break;
	}
1581 1582 1583
	default:
		break;
	}
1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595
	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);
1596 1597 1598 1599
	if (!ep) {
		printk(KERN_WARNING MOD "Abort rpl to freed endpoint\n");
		return 0;
	}
1600
	PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1601
	mutex_lock(&ep->com.mutex);
1602 1603
	switch (ep->com.state) {
	case ABORTING:
1604
		c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
1605 1606 1607 1608 1609 1610 1611 1612
		__state_set(&ep->com, DEAD);
		release = 1;
		break;
	default:
		printk(KERN_ERR "%s ep %p state %d\n",
		     __func__, ep, ep->com.state);
		break;
	}
1613
	mutex_unlock(&ep->com.mutex);
1614 1615 1616 1617 1618 1619

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

1620 1621 1622 1623 1624 1625
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;
1626
	struct sockaddr_in *sin;
1627 1628 1629 1630 1631 1632 1633 1634

	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)));
	req->le.filter = cpu_to_be32(select_ntuple(ep->com.dev, ep->dst,
				     ep->l2t));
1635 1636 1637 1638 1639 1640
	sin = (struct sockaddr_in *)&ep->com.local_addr;
	req->le.lport = sin->sin_port;
	req->le.u.ipv4.lip = sin->sin_addr.s_addr;
	sin = (struct sockaddr_in *)&ep->com.remote_addr;
	req->le.pport = sin->sin_port;
	req->le.u.ipv4.pip = sin->sin_addr.s_addr;
1641 1642 1643 1644 1645
	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);
1646
	req->tcb.tx_max = (__force __be32) jiffies;
1647
	req->tcb.rcv_adv = htons(1);
1648 1649
	cxgb4_best_mtu(ep->com.dev->rdev.lldi.mtus, ep->mtu, &mtu_idx);
	wscale = compute_wscale(rcv_win);
1650
	req->tcb.opt0 = (__force __be64) (TCAM_BYPASS(1) |
1651 1652 1653 1654 1655 1656 1657 1658 1659 1660
		(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) |
1661 1662
		RCV_BUFSIZ(rcv_win >> 10));
	req->tcb.opt2 = (__force __be32) (PACE(1) |
1663 1664 1665
		TX_QUEUE(ep->com.dev->rdev.lldi.tx_modq[ep->tx_chan]) |
		RX_CHANNEL(0) |
		CCTRL_ECN(enable_ecn) |
1666
		RSS_QUEUE_VALID | RSS_QUEUE(ep->rss_qid));
1667
	if (enable_tcp_timestamps)
1668
		req->tcb.opt2 |= (__force __be32) TSTAMPS_EN(1);
1669
	if (enable_tcp_sack)
1670
		req->tcb.opt2 |= (__force __be32) SACK_EN(1);
1671
	if (wscale && enable_tcp_window_scaling)
1672 1673 1674
		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);
1675 1676
	set_wr_txq(skb, CPL_PRIORITY_CONTROL, ep->ctrlq_idx);
	set_bit(ACT_OFLD_CONN, &ep->com.history);
1677 1678 1679
	c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
}

1680 1681 1682 1683 1684 1685 1686 1687 1688
/*
 * 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;
}

1689 1690
#define ACT_OPEN_RETRY_COUNT 2

1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708 1709 1710 1711 1712 1713 1714 1715 1716 1717 1718 1719 1720 1721 1722 1723 1724 1725 1726 1727 1728 1729 1730 1731 1732 1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744 1745 1746 1747 1748 1749 1750 1751 1752 1753 1754 1755 1756 1757 1758 1759 1760 1761 1762 1763 1764 1765 1766 1767 1768 1769
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];
		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);
		ep->tx_chan = cxgb4_port_chan(n->dev);
		ep->smac_idx = (cxgb4_port_viid(n->dev) & 0x7F) << 1;
		step = cdev->rdev.lldi.ntxq /
			cdev->rdev.lldi.nchan;
		ep->txq_idx = cxgb4_port_idx(n->dev) * step;
		ep->ctrlq_idx = cxgb4_port_idx(n->dev);
		step = cdev->rdev.lldi.nrxq /
			cdev->rdev.lldi.nchan;
		ep->rss_qid = cdev->rdev.lldi.rxq_ids[
			cxgb4_port_idx(n->dev) * step];

		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;
}

1770 1771 1772
static int c4iw_reconnect(struct c4iw_ep *ep)
{
	int err = 0;
1773 1774 1775 1776
	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;
1777 1778 1779 1780 1781 1782
	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;
1783 1784 1785 1786 1787 1788 1789 1790 1791 1792 1793 1794 1795 1796 1797 1798

	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 */
1799 1800 1801 1802 1803 1804 1805 1806 1807 1808 1809 1810 1811 1812 1813
	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) {
1814 1815 1816 1817
		pr_err("%s - cannot find route.\n", __func__);
		err = -EHOSTUNREACH;
		goto fail3;
	}
1818 1819
	err = import_ep(ep, iptype, ra, ep->dst, ep->com.dev, false);
	if (err) {
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 1847 1848 1849 1850 1851 1852 1853 1854
		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;
}

1855 1856 1857 1858 1859 1860 1861 1862
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));
1863 1864 1865 1866
	struct sockaddr_in *la;
	struct sockaddr_in *ra;
	struct sockaddr_in6 *la6;
	struct sockaddr_in6 *ra6;
1867 1868

	ep = lookup_atid(t, atid);
1869 1870 1871 1872
	la = (struct sockaddr_in *)&ep->com.local_addr;
	ra = (struct sockaddr_in *)&ep->com.remote_addr;
	la6 = (struct sockaddr_in6 *)&ep->com.local_addr;
	ra6 = (struct sockaddr_in6 *)&ep->com.remote_addr;
1873 1874 1875 1876 1877 1878 1879 1880 1881 1882

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

	if (status == CPL_ERR_RTX_NEG_ADVICE) {
		printk(KERN_WARNING MOD "Connection problems for atid %u\n",
			atid);
		return 0;
	}

1883 1884
	set_bit(ACT_OPEN_RPL, &ep->com.history);

1885 1886 1887 1888 1889 1890 1891
	/*
	 * Log interesting failures.
	 */
	switch (status) {
	case CPL_ERR_CONN_RESET:
	case CPL_ERR_CONN_TIMEDOUT:
		break;
1892
	case CPL_ERR_TCAM_FULL:
1893
		mutex_lock(&dev->rdev.stats.lock);
1894
		dev->rdev.stats.tcam_full++;
1895 1896 1897
		mutex_unlock(&dev->rdev.stats.lock);
		if (ep->com.local_addr.ss_family == AF_INET &&
		    dev->rdev.lldi.enable_fw_ofld_conn) {
1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914
			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;
		}
1915
		break;
1916
	default:
1917 1918 1919 1920 1921 1922 1923 1924 1925 1926 1927
		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));
		}
1928 1929 1930
		break;
	}

1931 1932 1933 1934 1935 1936
	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));

1937
	remove_handle(ep->com.dev, &ep->com.dev->atid_idr, atid);
1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953
	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) {
1954 1955
		PDBG("%s stid %d lookup failure!\n", __func__, stid);
		goto out;
1956 1957 1958
	}
	PDBG("%s ep %p status %d error %d\n", __func__, ep,
	     rpl->status, status2errno(rpl->status));
1959
	c4iw_wake_up(&ep->com.wr_wait, status2errno(rpl->status));
1960

1961
out:
1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972
	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);
1973
	c4iw_wake_up(&ep->com.wr_wait, status2errno(rpl->status));
1974 1975 1976
	return 0;
}

1977
static void accept_cr(struct c4iw_ep *ep, struct sk_buff *skb,
1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991
		      struct cpl_pass_accept_req *req)
{
	struct cpl_pass_accept_rpl *rpl;
	unsigned int mtu_idx;
	u64 opt0;
	u32 opt2;
	int wscale;

	PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
	BUG_ON(skb_cloned(skb));
	skb_trim(skb, sizeof(*rpl));
	skb_get(skb);
	cxgb4_best_mtu(ep->com.dev->rdev.lldi.mtus, ep->mtu, &mtu_idx);
	wscale = compute_wscale(rcv_win);
1992 1993
	opt0 = (nocong ? NO_CONG(1) : 0) |
	       KEEP_ALIVE(1) |
1994
	       DELACK(1) |
1995 1996 1997 1998 1999
	       WND_SCALE(wscale) |
	       MSS_IDX(mtu_idx) |
	       L2T_IDX(ep->l2t->idx) |
	       TX_CHAN(ep->tx_chan) |
	       SMAC_SEL(ep->smac_idx) |
2000
	       DSCP(ep->tos >> 2) |
S
Steve Wise 已提交
2001
	       ULP_MODE(ULP_MODE_TCPDDP) |
2002 2003 2004 2005 2006 2007 2008 2009 2010 2011
	       RCV_BUFSIZ(rcv_win>>10);
	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);
2012 2013 2014 2015 2016 2017 2018 2019 2020
	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);
	}
2021 2022 2023 2024 2025 2026 2027

	rpl = cplhdr(skb);
	INIT_TP_WR(rpl, ep->hwtid);
	OPCODE_TID(rpl) = cpu_to_be32(MK_OPCODE_TID(CPL_PASS_ACCEPT_RPL,
				      ep->hwtid));
	rpl->opt0 = cpu_to_be64(opt0);
	rpl->opt2 = cpu_to_be32(opt2);
S
Steve Wise 已提交
2028
	set_wr_txq(skb, CPL_PRIORITY_SETUP, ep->ctrlq_idx);
2029
	t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
2030 2031 2032 2033 2034
	c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);

	return;
}

2035
static void reject_cr(struct c4iw_dev *dev, u32 hwtid, struct sk_buff *skb)
2036
{
2037
	PDBG("%s c4iw_dev %p tid %u\n", __func__, dev, hwtid);
2038 2039 2040 2041 2042 2043 2044
	BUG_ON(skb_cloned(skb));
	skb_trim(skb, sizeof(struct cpl_tid_release));
	skb_get(skb);
	release_tid(&dev->rdev, hwtid, skb);
	return;
}

2045 2046
static void get_4tuple(struct cpl_pass_accept_req *req, int *iptype,
		       __u8 *local_ip, __u8 *peer_ip,
2047 2048 2049 2050 2051
		       __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);
2052
	struct ipv6hdr *ip6 = (struct ipv6hdr *)((u8 *)(req + 1) + eth_len);
2053 2054 2055
	struct tcphdr *tcp = (struct tcphdr *)
			     ((u8 *)(req + 1) + eth_len + ip_len);

2056 2057 2058 2059 2060 2061 2062 2063 2064 2065 2066 2067 2068 2069 2070
	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);
	}
2071 2072 2073 2074 2075 2076 2077 2078
	*peer_port = tcp->source;
	*local_port = tcp->dest;

	return;
}

static int pass_accept_req(struct c4iw_dev *dev, struct sk_buff *skb)
{
2079
	struct c4iw_ep *child_ep = NULL, *parent_ep;
2080 2081 2082 2083 2084
	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;
2085
	__u8 local_ip[16], peer_ip[16];
2086
	__be16 local_port, peer_port;
2087
	int err;
2088
	u16 peer_mss = ntohs(req->tcpopt.mss);
2089
	int iptype;
2090 2091

	parent_ep = lookup_stid(t, stid);
2092 2093 2094 2095 2096
	if (!parent_ep) {
		PDBG("%s connect request on invalid stid %d\n", __func__, stid);
		goto reject;
	}

2097 2098 2099 2100 2101 2102
	if (state_read(&parent_ep->com) != LISTEN) {
		printk(KERN_ERR "%s - listening ep not in LISTEN\n",
		       __func__);
		goto reject;
	}

2103 2104
	get_4tuple(req, &iptype, local_ip, peer_ip, &local_port, &peer_port);

2105
	/* Find output route */
2106 2107 2108 2109 2110 2111 2112 2113 2114 2115 2116 2117 2118 2119 2120 2121 2122 2123 2124
	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) {
2125 2126 2127 2128
		printk(KERN_ERR MOD "%s - failed to find dst entry!\n",
		       __func__);
		goto reject;
	}
2129 2130 2131 2132

	child_ep = alloc_ep(sizeof(*child_ep), GFP_KERNEL);
	if (!child_ep) {
		printk(KERN_ERR MOD "%s - failed to allocate ep entry!\n",
2133 2134 2135 2136 2137
		       __func__);
		dst_release(dst);
		goto reject;
	}

2138
	err = import_ep(child_ep, iptype, peer_ip, dst, dev, false);
2139 2140
	if (err) {
		printk(KERN_ERR MOD "%s - failed to allocate l2t entry!\n",
2141 2142
		       __func__);
		dst_release(dst);
2143
		kfree(child_ep);
2144 2145
		goto reject;
	}
2146

2147 2148 2149
	if (peer_mss && child_ep->mtu > (peer_mss + 40))
		child_ep->mtu = peer_mss + 40;

2150 2151 2152
	state_set(&child_ep->com, CONNECTING);
	child_ep->com.dev = dev;
	child_ep->com.cm_id = NULL;
2153 2154 2155 2156 2157 2158 2159 2160 2161 2162 2163 2164 2165 2166 2167 2168 2169 2170 2171 2172 2173
	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);
	}
2174 2175 2176 2177 2178 2179 2180
	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__,
2181
	     child_ep->tx_chan, child_ep->smac_idx, child_ep->rss_qid);
2182 2183 2184

	init_timer(&child_ep->timer);
	cxgb4_insert_tid(t, child_ep, hwtid);
2185
	insert_handle(dev, &dev->hwtid_idr, child_ep, child_ep->hwtid);
2186
	accept_cr(child_ep, skb, req);
2187
	set_bit(PASS_ACCEPT_REQ, &child_ep->com.history);
2188 2189
	goto out;
reject:
2190
	reject_cr(dev, hwtid, skb);
2191 2192 2193 2194 2195 2196 2197 2198 2199 2200 2201 2202 2203 2204 2205 2206
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);

2207 2208 2209
	PDBG("%s ep %p hwtid %u tcp_opt 0x%02x\n", __func__, ep, tid,
	     ntohs(req->tcp_opt));

2210 2211 2212 2213 2214 2215
	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);
2216
	set_bit(PASS_ESTAB, &ep->com.history);
2217 2218 2219 2220 2221 2222 2223 2224 2225 2226 2227 2228 2229

	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
2230
	int ret;
2231 2232 2233 2234 2235

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

2236
	set_bit(PEER_CLOSE, &ep->com.history);
2237
	mutex_lock(&ep->com.mutex);
2238 2239 2240 2241 2242 2243 2244 2245 2246 2247 2248 2249 2250 2251 2252 2253 2254 2255
	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);
2256
		c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
2257 2258 2259 2260
		break;
	case MPA_REP_SENT:
		__state_set(&ep->com, CLOSING);
		PDBG("waking up ep %p tid %u\n", ep, ep->hwtid);
2261
		c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
2262 2263
		break;
	case FPDU_MODE:
2264
		start_ep_timer(ep);
2265
		__state_set(&ep->com, CLOSING);
2266
		attrs.next_state = C4IW_QP_STATE_CLOSING;
S
Steve Wise 已提交
2267
		ret = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
2268
				       C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
S
Steve Wise 已提交
2269 2270 2271 2272
		if (ret != -ECONNRESET) {
			peer_close_upcall(ep);
			disconnect = 1;
		}
2273 2274 2275 2276 2277 2278 2279 2280 2281
		break;
	case ABORTING:
		disconnect = 0;
		break;
	case CLOSING:
		__state_set(&ep->com, MORIBUND);
		disconnect = 0;
		break;
	case MORIBUND:
2282
		stop_ep_timer(ep);
2283 2284 2285 2286 2287 2288 2289 2290 2291 2292 2293 2294 2295 2296 2297 2298
		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);
		}
		close_complete_upcall(ep);
		__state_set(&ep->com, DEAD);
		release = 1;
		disconnect = 0;
		break;
	case DEAD:
		disconnect = 0;
		break;
	default:
		BUG_ON(1);
	}
2299
	mutex_unlock(&ep->com.mutex);
2300 2301 2302 2303 2304 2305 2306 2307 2308 2309 2310 2311 2312 2313 2314 2315 2316 2317 2318 2319 2320 2321 2322 2323 2324 2325 2326 2327 2328 2329 2330 2331 2332 2333 2334 2335
	if (disconnect)
		c4iw_ep_disconnect(ep, 0, GFP_KERNEL);
	if (release)
		release_ep_resources(ep);
	return 0;
}

/*
 * Returns whether an ABORT_REQ_RSS message is a negative advice.
 */
static int is_neg_adv_abort(unsigned int status)
{
	return status == CPL_ERR_RTX_NEG_ADVICE ||
	       status == CPL_ERR_PERSIST_NEG_ADVICE;
}

static int peer_abort(struct 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);
	if (is_neg_adv_abort(req->status)) {
		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);
2336
	set_bit(PEER_ABORT, &ep->com.history);
2337 2338 2339

	/*
	 * Wake up any threads in rdma_init() or rdma_fini().
2340 2341
	 * However, this is not needed if com state is just
	 * MPA_REQ_SENT
2342
	 */
2343 2344
	if (ep->com.state != MPA_REQ_SENT)
		c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
2345 2346

	mutex_lock(&ep->com.mutex);
2347 2348 2349 2350
	switch (ep->com.state) {
	case CONNECTING:
		break;
	case MPA_REQ_WAIT:
2351
		stop_ep_timer(ep);
2352 2353
		break;
	case MPA_REQ_SENT:
2354
		stop_ep_timer(ep);
2355
		if (mpa_rev == 1 || (mpa_rev == 2 && ep->tried_with_mpa_v1))
2356 2357 2358 2359 2360 2361 2362 2363 2364 2365 2366 2367 2368 2369
			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;
		}
2370 2371 2372 2373 2374 2375 2376
		break;
	case MPA_REP_SENT:
		break;
	case MPA_REQ_RCVD:
		break;
	case MORIBUND:
	case CLOSING:
2377
		stop_ep_timer(ep);
2378 2379 2380 2381 2382 2383 2384 2385 2386 2387 2388 2389 2390 2391 2392 2393 2394 2395
		/*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__);
2396
		mutex_unlock(&ep->com.mutex);
2397 2398 2399 2400 2401 2402 2403 2404
		return 0;
	default:
		BUG_ON(1);
		break;
	}
	dst_confirm(ep->dst);
	if (ep->com.state != ABORTING) {
		__state_set(&ep->com, DEAD);
2405 2406 2407
		/* we don't release if we want to retry with mpa_v1 */
		if (!ep->retry_with_mpa_v1)
			release = 1;
2408
	}
2409
	mutex_unlock(&ep->com.mutex);
2410 2411 2412 2413 2414 2415 2416 2417 2418 2419 2420 2421 2422 2423 2424 2425 2426

	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);
2427 2428
	else if (ep->retry_with_mpa_v1) {
		remove_handle(ep->com.dev, &ep->com.dev->hwtid_idr, ep->hwtid);
2429 2430 2431 2432 2433 2434
		cxgb4_remove_tid(ep->com.dev->rdev.lldi.tids, 0, ep->hwtid);
		dst_release(ep->dst);
		cxgb4_l2t_release(ep->l2t);
		c4iw_reconnect(ep);
	}

2435 2436 2437 2438 2439 2440 2441 2442 2443 2444 2445 2446 2447 2448 2449 2450 2451 2452
	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 */
2453
	mutex_lock(&ep->com.mutex);
2454 2455 2456 2457 2458
	switch (ep->com.state) {
	case CLOSING:
		__state_set(&ep->com, MORIBUND);
		break;
	case MORIBUND:
2459
		stop_ep_timer(ep);
2460 2461 2462 2463 2464 2465 2466 2467 2468 2469 2470 2471 2472 2473 2474 2475 2476 2477
		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);
		}
		close_complete_upcall(ep);
		__state_set(&ep->com, DEAD);
		release = 1;
		break;
	case ABORTING:
	case DEAD:
		break;
	default:
		BUG_ON(1);
		break;
	}
2478
	mutex_unlock(&ep->com.mutex);
2479 2480 2481 2482 2483 2484 2485
	if (release)
		release_ep_resources(ep);
	return 0;
}

static int terminate(struct c4iw_dev *dev, struct sk_buff *skb)
{
2486
	struct cpl_rdma_terminate *rpl = cplhdr(skb);
2487
	struct tid_info *t = dev->rdev.lldi.tids;
2488 2489 2490
	unsigned int tid = GET_TID(rpl);
	struct c4iw_ep *ep;
	struct c4iw_qp_attributes attrs;
2491 2492

	ep = lookup_tid(t, tid);
2493
	BUG_ON(!ep);
2494

2495
	if (ep && ep->com.qp) {
2496 2497 2498 2499 2500 2501
		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
2502
		printk(KERN_WARNING MOD "TERM received tid %u no ep/qp\n", tid);
2503 2504 2505 2506 2507 2508 2509 2510 2511 2512 2513 2514 2515 2516 2517 2518 2519 2520 2521 2522 2523

	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) {
2524 2525
		PDBG("%s 0 credit ack ep %p tid %u state %u\n",
		     __func__, ep, ep->hwtid, state_read(&ep->com));
2526 2527 2528 2529 2530 2531 2532 2533 2534 2535 2536 2537 2538 2539 2540 2541 2542 2543 2544 2545 2546 2547 2548 2549
		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)
{
	int err;
	struct c4iw_ep *ep = to_ep(cm_id);
	PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);

	if (state_read(&ep->com) == DEAD) {
		c4iw_put_ep(&ep->com);
		return -ECONNRESET;
	}
2550
	set_bit(ULP_REJECT, &ep->com.history);
2551 2552 2553 2554 2555 2556 2557 2558 2559 2560 2561 2562 2563 2564 2565 2566 2567 2568 2569 2570 2571 2572 2573 2574 2575 2576 2577 2578 2579
	BUG_ON(state_read(&ep->com) != MPA_REQ_RCVD);
	if (mpa_rev == 0)
		abort_connection(ep, NULL, GFP_KERNEL);
	else {
		err = send_mpa_reject(ep, pdata, pdata_len);
		err = c4iw_ep_disconnect(ep, 0, GFP_KERNEL);
	}
	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);
	if (state_read(&ep->com) == DEAD) {
		err = -ECONNRESET;
		goto err;
	}

	BUG_ON(state_read(&ep->com) != MPA_REQ_RCVD);
	BUG_ON(!qp);

2580
	set_bit(ULP_ACCEPT, &ep->com.history);
2581 2582
	if ((conn_param->ord > c4iw_max_read_depth) ||
	    (conn_param->ird > c4iw_max_read_depth)) {
2583 2584 2585 2586 2587
		abort_connection(ep, NULL, GFP_KERNEL);
		err = -EINVAL;
		goto err;
	}

2588 2589 2590 2591 2592 2593 2594 2595 2596 2597 2598 2599 2600 2601 2602 2603 2604 2605 2606
	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;
			}
		}
2607

2608
	}
2609 2610 2611
	ep->ird = conn_param->ird;
	ep->ord = conn_param->ord;

2612 2613 2614
	if (ep->mpa_attr.version != 2)
		if (peer2peer && ep->ird == 0)
			ep->ird = 1;
2615 2616 2617

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

2618 2619 2620
	cm_id->add_ref(cm_id);
	ep->com.cm_id = cm_id;
	ep->com.qp = qp;
2621
	ref_qp(ep);
2622

2623 2624 2625 2626 2627 2628 2629 2630 2631 2632 2633 2634 2635 2636 2637 2638 2639 2640 2641 2642 2643 2644 2645 2646 2647 2648 2649 2650 2651 2652 2653 2654 2655 2656 2657
	/* 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;

	state_set(&ep->com, FPDU_MODE);
	established_upcall(ep);
	c4iw_put_ep(&ep->com);
	return 0;
err1:
	ep->com.cm_id = NULL;
	cm_id->rem_ref(cm_id);
err:
	c4iw_put_ep(&ep->com);
	return err;
}

2658 2659 2660 2661 2662 2663 2664 2665 2666 2667 2668 2669 2670 2671 2672 2673 2674 2675 2676 2677 2678 2679 2680 2681 2682 2683 2684 2685 2686 2687 2688 2689 2690 2691 2692 2693 2694 2695 2696 2697 2698 2699 2700 2701 2702 2703 2704 2705 2706 2707 2708 2709 2710 2711 2712 2713 2714 2715 2716 2717 2718
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;
}

2719 2720 2721 2722
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;
2723
	int err = 0;
2724 2725
	struct sockaddr_in *laddr = (struct sockaddr_in *)&cm_id->local_addr;
	struct sockaddr_in *raddr = (struct sockaddr_in *)&cm_id->remote_addr;
2726 2727 2728 2729 2730
	struct sockaddr_in6 *laddr6 = (struct sockaddr_in6 *)&cm_id->local_addr;
	struct sockaddr_in6 *raddr6 = (struct sockaddr_in6 *)
				      &cm_id->remote_addr;
	__u8 *ra;
	int iptype;
2731

2732 2733 2734 2735 2736
	if ((conn_param->ord > c4iw_max_read_depth) ||
	    (conn_param->ird > c4iw_max_read_depth)) {
		err = -EINVAL;
		goto out;
	}
2737 2738 2739 2740 2741 2742 2743 2744 2745 2746 2747 2748 2749 2750 2751 2752 2753 2754 2755 2756 2757
	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);
2758 2759 2760 2761 2762
	if (!ep->com.qp) {
		PDBG("%s qpn 0x%x not found!\n", __func__, conn_param->qpn);
		err = -EINVAL;
		goto fail2;
	}
2763
	ref_qp(ep);
2764 2765 2766 2767 2768 2769 2770 2771 2772 2773 2774 2775
	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;
		goto fail2;
	}
2776
	insert_handle(dev, &dev->atid_idr, ep, ep->atid);
2777

2778 2779 2780
	if (cm_id->remote_addr.ss_family == AF_INET) {
		iptype = 4;
		ra = (__u8 *)&raddr->sin_addr;
2781

2782 2783 2784 2785 2786 2787 2788 2789 2790 2791 2792 2793 2794 2795 2796 2797 2798 2799 2800 2801 2802 2803 2804 2805 2806 2807 2808 2809 2810 2811 2812 2813 2814 2815 2816 2817 2818 2819 2820 2821
		/*
		 * 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)
				goto fail2;
		}

		/* 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)
				goto fail2;
		}

		/* 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) {
2822 2823 2824 2825 2826
		printk(KERN_ERR MOD "%s - cannot find route.\n", __func__);
		err = -EHOSTUNREACH;
		goto fail3;
	}

2827
	err = import_ep(ep, iptype, ra, ep->dst, ep->com.dev, true);
2828
	if (err) {
2829 2830 2831 2832 2833 2834 2835 2836 2837 2838
		printk(KERN_ERR MOD "%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;
2839 2840 2841 2842
	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));
2843 2844 2845 2846 2847 2848 2849 2850 2851 2852

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

	cxgb4_l2t_release(ep->l2t);
fail4:
	dst_release(ep->dst);
fail3:
2853
	remove_handle(ep->com.dev, &ep->com.dev->atid_idr, ep->atid);
2854 2855 2856 2857 2858 2859 2860 2861
	cxgb4_free_atid(ep->com.dev->rdev.lldi.tids, ep->atid);
fail2:
	cm_id->rem_ref(cm_id);
	c4iw_put_ep(&ep->com);
out:
	return err;
}

2862 2863 2864 2865 2866 2867 2868 2869 2870 2871 2872 2873 2874 2875 2876 2877 2878 2879 2880 2881 2882 2883 2884 2885 2886 2887 2888 2889 2890 2891 2892 2893 2894 2895 2896 2897 2898 2899 2900 2901 2902 2903 2904 2905 2906 2907 2908 2909 2910 2911 2912 2913 2914 2915
static int create_server6(struct c4iw_dev *dev, struct c4iw_listen_ep *ep)
{
	int err;
	struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)&ep->com.local_addr;

	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;
	struct sockaddr_in *sin = (struct sockaddr_in *)&ep->com.local_addr;

	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;
}

2916 2917 2918 2919 2920 2921 2922 2923 2924 2925 2926 2927 2928 2929 2930 2931 2932 2933 2934
int c4iw_create_listen(struct iw_cm_id *cm_id, int backlog)
{
	int err = 0;
	struct c4iw_dev *dev = to_c4iw_dev(cm_id->device);
	struct c4iw_listen_ep *ep;

	might_sleep();

	ep = alloc_ep(sizeof(*ep), GFP_KERNEL);
	if (!ep) {
		printk(KERN_ERR MOD "%s - cannot alloc ep.\n", __func__);
		err = -ENOMEM;
		goto fail1;
	}
	PDBG("%s ep %p\n", __func__, ep);
	cm_id->add_ref(cm_id);
	ep->com.cm_id = cm_id;
	ep->com.dev = dev;
	ep->backlog = backlog;
2935 2936
	memcpy(&ep->com.local_addr, &cm_id->local_addr,
	       sizeof(ep->com.local_addr));
2937 2938 2939 2940

	/*
	 * Allocate a server TID.
	 */
2941
	if (dev->rdev.lldi.enable_fw_ofld_conn)
2942 2943
		ep->stid = cxgb4_alloc_sftid(dev->rdev.lldi.tids,
					     cm_id->local_addr.ss_family, ep);
2944
	else
2945 2946
		ep->stid = cxgb4_alloc_stid(dev->rdev.lldi.tids,
					    cm_id->local_addr.ss_family, ep);
2947

2948
	if (ep->stid == -1) {
2949
		printk(KERN_ERR MOD "%s - cannot alloc stid.\n", __func__);
2950 2951 2952
		err = -ENOMEM;
		goto fail2;
	}
2953
	insert_handle(dev, &dev->stid_idr, ep, ep->stid);
2954
	state_set(&ep->com, LISTEN);
2955 2956 2957 2958
	if (ep->com.local_addr.ss_family == AF_INET)
		err = create_server4(dev, ep);
	else
		err = create_server6(dev, ep);
2959 2960 2961 2962
	if (!err) {
		cm_id->provider_data = ep;
		goto out;
	}
2963 2964
	cxgb4_free_stid(ep->com.dev->rdev.lldi.tids, ep->stid,
			ep->com.local_addr.ss_family);
2965 2966 2967 2968 2969 2970 2971 2972 2973 2974 2975 2976 2977 2978 2979 2980 2981
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);
2982 2983
	if (ep->com.dev->rdev.lldi.enable_fw_ofld_conn &&
	    ep->com.local_addr.ss_family == AF_INET) {
2984 2985 2986 2987 2988
		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);
2989 2990 2991
		err = cxgb4_remove_server(
				ep->com.dev->rdev.lldi.ports[0], ep->stid,
				ep->com.dev->rdev.lldi.rxq_ids[0], 0);
2992 2993 2994 2995 2996
		if (err)
			goto done;
		err = c4iw_wait_for_reply(&ep->com.dev->rdev, &ep->com.wr_wait,
					  0, 0, __func__);
	}
2997
	remove_handle(ep->com.dev, &ep->com.dev->stid_idr, ep->stid);
2998 2999
	cxgb4_free_stid(ep->com.dev->rdev.lldi.tids, ep->stid,
			ep->com.local_addr.ss_family);
3000 3001 3002 3003 3004 3005 3006 3007 3008 3009 3010 3011 3012
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;

3013
	mutex_lock(&ep->com.mutex);
3014 3015 3016 3017 3018 3019 3020 3021 3022 3023 3024 3025 3026 3027 3028 3029 3030 3031 3032 3033 3034

	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;
		close_complete_upcall(ep);
		ep->com.state = DEAD;
	}
	switch (ep->com.state) {
	case MPA_REQ_WAIT:
	case MPA_REQ_SENT:
	case MPA_REQ_RCVD:
	case MPA_REP_SENT:
	case FPDU_MODE:
		close = 1;
		if (abrupt)
			ep->com.state = ABORTING;
		else {
			ep->com.state = CLOSING;
3035
			start_ep_timer(ep);
3036 3037 3038 3039 3040 3041 3042
		}
		set_bit(CLOSE_SENT, &ep->com.flags);
		break;
	case CLOSING:
		if (!test_and_set_bit(CLOSE_SENT, &ep->com.flags)) {
			close = 1;
			if (abrupt) {
3043
				stop_ep_timer(ep);
3044 3045 3046 3047 3048 3049 3050 3051 3052 3053 3054 3055 3056 3057 3058 3059 3060
				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
3061
		if (abrupt) {
3062
			set_bit(EP_DISC_ABORT, &ep->com.history);
S
Steve Wise 已提交
3063 3064
			close_complete_upcall(ep);
			ret = send_abort(ep, NULL, gfp);
3065 3066
		} else {
			set_bit(EP_DISC_CLOSE, &ep->com.history);
3067
			ret = send_halfclose(ep, gfp);
3068
		}
3069 3070 3071
		if (ret)
			fatal = 1;
	}
S
Steve Wise 已提交
3072
	mutex_unlock(&ep->com.mutex);
3073 3074 3075 3076 3077
	if (fatal)
		release_ep_resources(ep);
	return ret;
}

3078 3079 3080 3081
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;
3082
	int atid = be32_to_cpu(req->tid);
3083

3084 3085
	ep = (struct c4iw_ep *)lookup_atid(dev->rdev.lldi.tids,
					   (__force u32) req->tid);
3086 3087 3088 3089 3090
	if (!ep)
		return;

	switch (req->retval) {
	case FW_ENOMEM:
3091 3092 3093 3094 3095
		set_bit(ACT_RETRY_NOMEM, &ep->com.history);
		if (ep->retry_count++ < ACT_OPEN_RETRY_COUNT) {
			send_fw_act_open_req(ep, atid);
			return;
		}
3096
	case FW_EADDRINUSE:
3097 3098 3099 3100 3101
		set_bit(ACT_RETRY_INUSE, &ep->com.history);
		if (ep->retry_count++ < ACT_OPEN_RETRY_COUNT) {
			send_fw_act_open_req(ep, atid);
			return;
		}
3102 3103 3104 3105 3106 3107
		break;
	default:
		pr_info("%s unexpected ofld conn wr retval %d\n",
		       __func__, req->retval);
		break;
	}
3108 3109 3110 3111 3112
	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);
3113
	connect_reply_upcall(ep, status2errno(req->retval));
3114 3115 3116 3117 3118 3119
	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);
3120 3121 3122 3123 3124 3125 3126 3127 3128
}

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;

3129
	rpl_skb = (struct sk_buff *)(unsigned long)req->cookie;
3130 3131 3132
	BUG_ON(!rpl_skb);
	if (req->retval) {
		PDBG("%s passive open failure %d\n", __func__, req->retval);
3133 3134 3135
		mutex_lock(&dev->rdev.stats.lock);
		dev->rdev.stats.pas_ofld_conn_fails++;
		mutex_unlock(&dev->rdev.stats.lock);
3136 3137 3138 3139
		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,
3140 3141
					(__force u32) htonl(
					(__force u32) req->tid)));
3142 3143 3144 3145 3146 3147 3148 3149
		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)
3150 3151
{
	struct cpl_fw6_msg *rpl = cplhdr(skb);
3152 3153 3154 3155 3156 3157 3158 3159 3160 3161 3162 3163 3164 3165 3166 3167 3168 3169 3170 3171 3172 3173 3174 3175 3176 3177 3178 3179
	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;
3180
	u16 vlantag, len, hdr_len, eth_hdr_len;
3181 3182 3183 3184
	u8 intf;
	struct cpl_rx_pkt *cpl = cplhdr(skb);
	struct cpl_pass_accept_req *req;
	struct tcp_options_received tmp_opt;
3185
	struct c4iw_dev *dev;
3186

3187
	dev = *((struct c4iw_dev **) (skb->cb + sizeof(void *)));
3188
	/* Store values from cpl_rx_pkt in temporary location. */
3189 3190 3191 3192
	vlantag = (__force u16) cpl->vlan;
	len = (__force u16) cpl->len;
	l2info  = (__force u32) cpl->l2info;
	hdr_len = (__force u16) cpl->hdr_len;
3193 3194 3195 3196 3197 3198 3199 3200 3201 3202
	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
3203
	tcp_parse_options(skb, &tmp_opt, 0, NULL);
3204 3205 3206 3207

	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) |
3208 3209
			 V_SYN_MAC_IDX(G_RX_MACIDX(
			 (__force int) htonl(l2info))) |
3210
			 F_SYN_XACT_MATCH);
3211 3212 3213
	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));
3214 3215 3216 3217 3218 3219
	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))) |
3220
				   V_ETH_HDR_LEN(G_RX_ETHHDR_LEN(eth_hdr_len)));
3221 3222
	req->vlan = (__force __be16) vlantag;
	req->len = (__force __be16) len;
3223 3224 3225 3226 3227 3228 3229 3230 3231 3232 3233 3234 3235 3236 3237 3238 3239 3240 3241 3242 3243 3244 3245 3246 3247 3248 3249 3250
	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);

	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);
3251
	req->le.filter = (__force __be32) filter;
3252 3253 3254 3255 3256 3257 3258 3259 3260 3261 3262 3263 3264 3265 3266 3267 3268 3269 3270 3271 3272 3273 3274 3275 3276
	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));
3277
	req->cookie = (unsigned long)skb;
3278 3279 3280 3281 3282 3283 3284 3285 3286 3287 3288 3289 3290 3291 3292 3293 3294 3295 3296 3297 3298 3299 3300 3301 3302 3303 3304 3305 3306

	set_wr_txq(req_skb, CPL_PRIORITY_CONTROL, port_id);
	cxgb4_ofld_send(dev->rdev.lldi.ports[0], req_skb);
}

/*
 * 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;
3307
	u16 rss_qid, eth_hdr_len;
3308 3309 3310 3311 3312 3313 3314 3315 3316 3317 3318 3319 3320 3321 3322 3323 3324 3325
	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.
	 */
3326
	stid = (__force int) cpu_to_be32((__force u32) rss->hash_val);
3327 3328 3329 3330 3331 3332 3333

	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;
	}

3334 3335 3336 3337
	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) {
3338 3339 3340 3341 3342 3343 3344 3345 3346 3347 3348 3349 3350 3351 3352 3353 3354 3355 3356 3357
		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);

3358 3359 3360
	dst = find_route(dev, iph->daddr, iph->saddr, tcph->dest, tcph->source,
			 iph->tos);
	if (!dst) {
3361 3362 3363 3364 3365 3366
		pr_err("%s - failed to find dst entry!\n",
		       __func__);
		goto reject;
	}
	neigh = dst_neigh_lookup_skb(dst, skb);

3367 3368 3369 3370 3371 3372
	if (!neigh) {
		pr_err("%s - failed to allocate neigh!\n",
		       __func__);
		goto free_dst;
	}

3373 3374 3375 3376 3377 3378 3379 3380
	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 {
3381
		pdev = get_real_dev(neigh->dev);
3382
		e = cxgb4_l2t_get(dev->rdev.lldi.l2t, neigh,
3383 3384 3385
					pdev, 0);
		pi = (struct port_info *)netdev_priv(pdev);
		tx_chan = cxgb4_port_chan(pdev);
3386 3387 3388 3389 3390 3391 3392 3393 3394
	}
	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];
3395
	window = (__force u16) htons((__force u16)tcph->window);
3396 3397

	/* Calcuate filter portion for LE region. */
3398
	filter = (__force unsigned int) cpu_to_be32(select_ntuple(dev, dst, e));
3399 3400 3401 3402 3403 3404 3405 3406 3407 3408 3409 3410 3411 3412

	/*
	 * 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:
3413 3414 3415
	return 0;
}

3416 3417 3418 3419 3420 3421 3422 3423 3424 3425 3426 3427 3428 3429 3430 3431 3432 3433
/*
 * 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,
3434
	[CPL_FW4_ACK] = fw4_ack,
3435 3436
	[CPL_FW6_MSG] = deferred_fw6_msg,
	[CPL_RX_PKT] = rx_pkt
3437 3438 3439 3440 3441 3442 3443
};

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

3444
	mutex_lock(&ep->com.mutex);
3445 3446
	PDBG("%s ep %p tid %u state %d\n", __func__, ep, ep->hwtid,
	     ep->com.state);
3447
	set_bit(TIMEDOUT, &ep->com.history);
3448 3449 3450 3451 3452 3453 3454 3455 3456 3457 3458 3459 3460 3461 3462 3463 3464 3465 3466
	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);
		break;
	default:
J
Julia Lawall 已提交
3467
		WARN(1, "%s unexpected state ep %p tid %u state %u\n",
3468 3469 3470
			__func__, ep, ep->hwtid, ep->com.state);
		abort = 0;
	}
3471
	mutex_unlock(&ep->com.mutex);
3472 3473 3474 3475 3476 3477 3478 3479 3480 3481 3482 3483 3484 3485 3486 3487 3488 3489 3490 3491 3492 3493 3494 3495 3496 3497 3498
	if (abort)
		abort_connection(ep, NULL, GFP_KERNEL);
	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);
		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;
3499
	struct cpl_act_establish *rpl;
3500 3501 3502 3503 3504 3505 3506 3507 3508 3509 3510 3511 3512 3513 3514 3515 3516 3517 3518 3519 3520
	unsigned int opcode;
	int ret;

	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);
	}
	process_timedout_eps();
}

static DECLARE_WORK(skb_work, process_work);

static void ep_timeout(unsigned long arg)
{
	struct c4iw_ep *ep = (struct c4iw_ep *)arg;
3521
	int kickit = 0;
3522 3523

	spin_lock(&timeout_lock);
3524 3525 3526 3527
	if (!test_and_set_bit(TIMEOUT, &ep->com.flags)) {
		list_add_tail(&ep->entry, &timeout_list);
		kickit = 1;
	}
3528
	spin_unlock(&timeout_lock);
3529 3530
	if (kickit)
		queue_work(workq, &skb_work);
3531 3532
}

3533 3534 3535 3536 3537 3538 3539 3540 3541 3542 3543 3544 3545 3546 3547 3548 3549 3550 3551 3552 3553 3554 3555 3556 3557 3558 3559
/*
 * 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));
	}
3560
	kfree_skb(skb);
3561 3562 3563
	return 0;
}

3564 3565 3566 3567 3568 3569 3570 3571 3572
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) {
3573
	case FW6_TYPE_WR_RPL:
3574
		ret = (int)((be64_to_cpu(rpl->data[0]) >> 8) & 0xff);
3575
		wr_waitp = (struct c4iw_wr_wait *)(__force unsigned long) rpl->data[1];
3576
		PDBG("%s wr_waitp %p ret %u\n", __func__, wr_waitp, ret);
3577 3578
		if (wr_waitp)
			c4iw_wake_up(wr_waitp, ret ? -ret : 0);
3579
		kfree_skb(skb);
3580
		break;
3581 3582
	case FW6_TYPE_CQE:
	case FW6_TYPE_OFLD_CONNECTION_WR_RPL:
3583
		sched(dev, skb);
3584
		break;
3585 3586 3587
	default:
		printk(KERN_ERR MOD "%s unexpected fw6 msg type %u\n", __func__,
		       rpl->type);
3588
		kfree_skb(skb);
3589 3590 3591 3592 3593
		break;
	}
	return 0;
}

S
Steve Wise 已提交
3594 3595 3596 3597 3598 3599 3600 3601
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);
3602 3603 3604 3605 3606 3607
	if (!ep) {
		printk(KERN_WARNING MOD
		       "Abort on non-existent endpoint, tid %d\n", tid);
		kfree_skb(skb);
		return 0;
	}
S
Steve Wise 已提交
3608 3609 3610 3611 3612 3613 3614 3615 3616 3617 3618
	if (is_neg_adv_abort(req->status)) {
		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().
3619 3620
	 * However, if we are on MPAv2 and want to retry with MPAv1
	 * then, don't wake up yet.
S
Steve Wise 已提交
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	 */
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	if (mpa_rev == 2 && !ep->tried_with_mpa_v1) {
		if (ep->com.state != MPA_REQ_SENT)
			c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
	} else
		c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
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	sched(dev, skb);
	return 0;
}

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/*
 * Most upcalls from the T4 Core go to sched() to
 * schedule the processing on a work queue.
 */
c4iw_handler_func c4iw_handlers[NUM_CPL_CMDS] = {
	[CPL_ACT_ESTABLISH] = sched,
	[CPL_ACT_OPEN_RPL] = sched,
	[CPL_RX_DATA] = sched,
	[CPL_ABORT_RPL_RSS] = sched,
	[CPL_ABORT_RPL] = sched,
	[CPL_PASS_OPEN_RPL] = sched,
	[CPL_CLOSE_LISTSRV_RPL] = sched,
	[CPL_PASS_ACCEPT_REQ] = sched,
	[CPL_PASS_ESTABLISH] = sched,
	[CPL_PEER_CLOSE] = sched,
	[CPL_CLOSE_CON_RPL] = sched,
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	[CPL_ABORT_REQ_RSS] = peer_abort_intr,
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	[CPL_RDMA_TERMINATE] = sched,
	[CPL_FW4_ACK] = sched,
	[CPL_SET_TCB_RPL] = set_tcb_rpl,
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	[CPL_FW6_MSG] = fw6_msg,
	[CPL_RX_PKT] = sched
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};

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int __init c4iw_cm_init(void)
{
3657
	spin_lock_init(&timeout_lock);
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	skb_queue_head_init(&rxq);

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

	return 0;
}

void __exit c4iw_cm_term(void)
{
3669
	WARN_ON(!list_empty(&timeout_list));
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	flush_workqueue(workq);
	destroy_workqueue(workq);
}