![David S. Miller](/assets/img/avatar_default.png)
The idea here is this minimizes the number of places one has to edit in order to make changes to how flows are defined and used. Signed-off-by: David S. Miller <davem@davemloft.net>
2239 lines
57 KiB
C
2239 lines
57 KiB
C
/*
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* Copyright (c) 2006 Chelsio, Inc. All rights reserved.
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*
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* This software is available to you under a choice of one of two
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* licenses. You may choose to be licensed under the terms of the GNU
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* General Public License (GPL) Version 2, available from the file
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* COPYING in the main directory of this source tree, or the
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* OpenIB.org BSD license below:
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* - Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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*
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* - Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#include <linux/module.h>
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#include <linux/list.h>
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#include <linux/slab.h>
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#include <linux/workqueue.h>
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#include <linux/skbuff.h>
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#include <linux/timer.h>
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#include <linux/notifier.h>
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#include <linux/inetdevice.h>
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#include <net/neighbour.h>
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#include <net/netevent.h>
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#include <net/route.h>
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#include "tcb.h"
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#include "cxgb3_offload.h"
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#include "iwch.h"
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#include "iwch_provider.h"
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#include "iwch_cm.h"
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static char *states[] = {
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"idle",
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"listen",
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"connecting",
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"mpa_wait_req",
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"mpa_req_sent",
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"mpa_req_rcvd",
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"mpa_rep_sent",
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"fpdu_mode",
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"aborting",
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"closing",
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"moribund",
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"dead",
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NULL,
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};
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int peer2peer = 0;
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module_param(peer2peer, int, 0644);
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MODULE_PARM_DESC(peer2peer, "Support peer2peer ULPs (default=0)");
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static int ep_timeout_secs = 60;
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module_param(ep_timeout_secs, int, 0644);
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MODULE_PARM_DESC(ep_timeout_secs, "CM Endpoint operation timeout "
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"in seconds (default=60)");
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static int mpa_rev = 1;
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module_param(mpa_rev, int, 0644);
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MODULE_PARM_DESC(mpa_rev, "MPA Revision, 0 supports amso1100, "
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"1 is spec compliant. (default=1)");
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static int markers_enabled = 0;
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module_param(markers_enabled, int, 0644);
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MODULE_PARM_DESC(markers_enabled, "Enable MPA MARKERS (default(0)=disabled)");
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static int crc_enabled = 1;
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module_param(crc_enabled, int, 0644);
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MODULE_PARM_DESC(crc_enabled, "Enable MPA CRC (default(1)=enabled)");
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static int rcv_win = 256 * 1024;
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module_param(rcv_win, int, 0644);
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MODULE_PARM_DESC(rcv_win, "TCP receive window in bytes (default=256)");
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static int snd_win = 32 * 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=32KB)");
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static unsigned int nocong = 0;
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module_param(nocong, uint, 0644);
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MODULE_PARM_DESC(nocong, "Turn off congestion control (default=0)");
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static unsigned int cong_flavor = 1;
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module_param(cong_flavor, uint, 0644);
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MODULE_PARM_DESC(cong_flavor, "TCP Congestion control flavor (default=1)");
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static struct workqueue_struct *workq;
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static struct sk_buff_head rxq;
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static struct sk_buff *get_skb(struct sk_buff *skb, int len, gfp_t gfp);
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static void ep_timeout(unsigned long arg);
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static void connect_reply_upcall(struct iwch_ep *ep, int status);
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static void start_ep_timer(struct iwch_ep *ep)
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{
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PDBG("%s ep %p\n", __func__, ep);
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if (timer_pending(&ep->timer)) {
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PDBG("%s stopped / restarted timer ep %p\n", __func__, ep);
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del_timer_sync(&ep->timer);
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} else
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get_ep(&ep->com);
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ep->timer.expires = jiffies + ep_timeout_secs * HZ;
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ep->timer.data = (unsigned long)ep;
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ep->timer.function = ep_timeout;
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add_timer(&ep->timer);
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}
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static void stop_ep_timer(struct iwch_ep *ep)
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{
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PDBG("%s ep %p\n", __func__, ep);
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if (!timer_pending(&ep->timer)) {
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printk(KERN_ERR "%s timer stopped when its not running! ep %p state %u\n",
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__func__, ep, ep->com.state);
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WARN_ON(1);
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return;
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}
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del_timer_sync(&ep->timer);
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put_ep(&ep->com);
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}
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static int iwch_l2t_send(struct t3cdev *tdev, struct sk_buff *skb, struct l2t_entry *l2e)
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{
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int error = 0;
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struct cxio_rdev *rdev;
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rdev = (struct cxio_rdev *)tdev->ulp;
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if (cxio_fatal_error(rdev)) {
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kfree_skb(skb);
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return -EIO;
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}
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error = l2t_send(tdev, skb, l2e);
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if (error < 0)
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kfree_skb(skb);
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return error;
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}
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int iwch_cxgb3_ofld_send(struct t3cdev *tdev, struct sk_buff *skb)
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{
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int error = 0;
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struct cxio_rdev *rdev;
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rdev = (struct cxio_rdev *)tdev->ulp;
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if (cxio_fatal_error(rdev)) {
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kfree_skb(skb);
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return -EIO;
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}
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error = cxgb3_ofld_send(tdev, skb);
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if (error < 0)
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kfree_skb(skb);
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return error;
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}
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static void release_tid(struct t3cdev *tdev, u32 hwtid, struct sk_buff *skb)
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{
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struct cpl_tid_release *req;
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skb = get_skb(skb, sizeof *req, GFP_KERNEL);
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if (!skb)
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return;
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req = (struct cpl_tid_release *) skb_put(skb, sizeof(*req));
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req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
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OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_TID_RELEASE, hwtid));
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skb->priority = CPL_PRIORITY_SETUP;
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iwch_cxgb3_ofld_send(tdev, skb);
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return;
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}
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int iwch_quiesce_tid(struct iwch_ep *ep)
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{
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struct cpl_set_tcb_field *req;
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struct sk_buff *skb = get_skb(NULL, sizeof(*req), GFP_KERNEL);
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if (!skb)
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return -ENOMEM;
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req = (struct cpl_set_tcb_field *) skb_put(skb, sizeof(*req));
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req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
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req->wr.wr_lo = htonl(V_WR_TID(ep->hwtid));
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OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, ep->hwtid));
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req->reply = 0;
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req->cpu_idx = 0;
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req->word = htons(W_TCB_RX_QUIESCE);
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req->mask = cpu_to_be64(1ULL << S_TCB_RX_QUIESCE);
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req->val = cpu_to_be64(1 << S_TCB_RX_QUIESCE);
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skb->priority = CPL_PRIORITY_DATA;
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return iwch_cxgb3_ofld_send(ep->com.tdev, skb);
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}
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int iwch_resume_tid(struct iwch_ep *ep)
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{
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struct cpl_set_tcb_field *req;
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struct sk_buff *skb = get_skb(NULL, sizeof(*req), GFP_KERNEL);
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if (!skb)
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return -ENOMEM;
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req = (struct cpl_set_tcb_field *) skb_put(skb, sizeof(*req));
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req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
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req->wr.wr_lo = htonl(V_WR_TID(ep->hwtid));
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OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, ep->hwtid));
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req->reply = 0;
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req->cpu_idx = 0;
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req->word = htons(W_TCB_RX_QUIESCE);
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req->mask = cpu_to_be64(1ULL << S_TCB_RX_QUIESCE);
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req->val = 0;
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skb->priority = CPL_PRIORITY_DATA;
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return iwch_cxgb3_ofld_send(ep->com.tdev, skb);
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}
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static void set_emss(struct iwch_ep *ep, u16 opt)
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{
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PDBG("%s ep %p opt %u\n", __func__, ep, opt);
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ep->emss = T3C_DATA(ep->com.tdev)->mtus[G_TCPOPT_MSS(opt)] - 40;
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if (G_TCPOPT_TSTAMP(opt))
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ep->emss -= 12;
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if (ep->emss < 128)
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ep->emss = 128;
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PDBG("emss=%d\n", ep->emss);
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}
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static enum iwch_ep_state state_read(struct iwch_ep_common *epc)
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{
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unsigned long flags;
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enum iwch_ep_state state;
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spin_lock_irqsave(&epc->lock, flags);
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state = epc->state;
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spin_unlock_irqrestore(&epc->lock, flags);
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return state;
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}
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static void __state_set(struct iwch_ep_common *epc, enum iwch_ep_state new)
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{
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epc->state = new;
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}
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static void state_set(struct iwch_ep_common *epc, enum iwch_ep_state new)
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{
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unsigned long flags;
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spin_lock_irqsave(&epc->lock, flags);
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PDBG("%s - %s -> %s\n", __func__, states[epc->state], states[new]);
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__state_set(epc, new);
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spin_unlock_irqrestore(&epc->lock, flags);
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return;
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}
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static void *alloc_ep(int size, gfp_t gfp)
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{
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struct iwch_ep_common *epc;
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epc = kzalloc(size, gfp);
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if (epc) {
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kref_init(&epc->kref);
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spin_lock_init(&epc->lock);
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init_waitqueue_head(&epc->waitq);
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}
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PDBG("%s alloc ep %p\n", __func__, epc);
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return epc;
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}
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void __free_ep(struct kref *kref)
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{
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struct iwch_ep *ep;
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ep = container_of(container_of(kref, struct iwch_ep_common, kref),
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struct iwch_ep, com);
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PDBG("%s ep %p state %s\n", __func__, ep, states[state_read(&ep->com)]);
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if (test_bit(RELEASE_RESOURCES, &ep->com.flags)) {
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cxgb3_remove_tid(ep->com.tdev, (void *)ep, ep->hwtid);
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dst_release(ep->dst);
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l2t_release(L2DATA(ep->com.tdev), ep->l2t);
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}
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kfree(ep);
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}
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static void release_ep_resources(struct iwch_ep *ep)
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{
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PDBG("%s ep %p tid %d\n", __func__, ep, ep->hwtid);
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set_bit(RELEASE_RESOURCES, &ep->com.flags);
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put_ep(&ep->com);
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}
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static int status2errno(int status)
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{
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switch (status) {
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case CPL_ERR_NONE:
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return 0;
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case CPL_ERR_CONN_RESET:
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return -ECONNRESET;
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case CPL_ERR_ARP_MISS:
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return -EHOSTUNREACH;
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case CPL_ERR_CONN_TIMEDOUT:
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return -ETIMEDOUT;
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case CPL_ERR_TCAM_FULL:
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return -ENOMEM;
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case CPL_ERR_CONN_EXIST:
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return -EADDRINUSE;
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default:
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return -EIO;
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}
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}
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/*
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* Try and reuse skbs already allocated...
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*/
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static struct sk_buff *get_skb(struct sk_buff *skb, int len, gfp_t gfp)
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{
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if (skb && !skb_is_nonlinear(skb) && !skb_cloned(skb)) {
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skb_trim(skb, 0);
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skb_get(skb);
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} else {
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skb = alloc_skb(len, gfp);
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}
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return skb;
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}
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static struct rtable *find_route(struct t3cdev *dev, __be32 local_ip,
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__be32 peer_ip, __be16 local_port,
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__be16 peer_port, u8 tos)
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{
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struct rtable *rt;
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rt = ip_route_output_ports(&init_net, NULL, peer_ip, local_ip,
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peer_port, local_port, IPPROTO_TCP,
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tos, 0);
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if (IS_ERR(rt))
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return NULL;
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return rt;
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}
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static unsigned int find_best_mtu(const struct t3c_data *d, unsigned short mtu)
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{
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int i = 0;
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while (i < d->nmtus - 1 && d->mtus[i + 1] <= mtu)
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++i;
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return i;
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}
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static void arp_failure_discard(struct t3cdev *dev, struct sk_buff *skb)
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{
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PDBG("%s t3cdev %p\n", __func__, dev);
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kfree_skb(skb);
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}
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/*
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* Handle an ARP failure for an active open.
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*/
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static void act_open_req_arp_failure(struct t3cdev *dev, struct sk_buff *skb)
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{
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printk(KERN_ERR MOD "ARP failure duing connect\n");
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kfree_skb(skb);
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}
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/*
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* Handle an ARP failure for a CPL_ABORT_REQ. Change it into a no RST variant
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* and send it along.
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*/
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static void abort_arp_failure(struct t3cdev *dev, struct sk_buff *skb)
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{
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struct cpl_abort_req *req = cplhdr(skb);
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PDBG("%s t3cdev %p\n", __func__, dev);
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req->cmd = CPL_ABORT_NO_RST;
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iwch_cxgb3_ofld_send(dev, skb);
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}
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static int send_halfclose(struct iwch_ep *ep, gfp_t gfp)
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{
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struct cpl_close_con_req *req;
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struct sk_buff *skb;
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PDBG("%s ep %p\n", __func__, ep);
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skb = get_skb(NULL, sizeof(*req), gfp);
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if (!skb) {
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printk(KERN_ERR MOD "%s - failed to alloc skb\n", __func__);
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return -ENOMEM;
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}
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skb->priority = CPL_PRIORITY_DATA;
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set_arp_failure_handler(skb, arp_failure_discard);
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req = (struct cpl_close_con_req *) skb_put(skb, sizeof(*req));
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req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_CLOSE_CON));
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req->wr.wr_lo = htonl(V_WR_TID(ep->hwtid));
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OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_CLOSE_CON_REQ, ep->hwtid));
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return iwch_l2t_send(ep->com.tdev, skb, ep->l2t);
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}
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static int send_abort(struct iwch_ep *ep, struct sk_buff *skb, gfp_t gfp)
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{
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struct cpl_abort_req *req;
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PDBG("%s ep %p\n", __func__, ep);
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skb = get_skb(skb, sizeof(*req), gfp);
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if (!skb) {
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printk(KERN_ERR MOD "%s - failed to alloc skb.\n",
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__func__);
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return -ENOMEM;
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}
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skb->priority = CPL_PRIORITY_DATA;
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set_arp_failure_handler(skb, abort_arp_failure);
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req = (struct cpl_abort_req *) skb_put(skb, sizeof(*req));
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req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_HOST_ABORT_CON_REQ));
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req->wr.wr_lo = htonl(V_WR_TID(ep->hwtid));
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OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_ABORT_REQ, ep->hwtid));
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req->cmd = CPL_ABORT_SEND_RST;
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return iwch_l2t_send(ep->com.tdev, skb, ep->l2t);
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}
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static int send_connect(struct iwch_ep *ep)
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{
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struct cpl_act_open_req *req;
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struct sk_buff *skb;
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u32 opt0h, opt0l, opt2;
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unsigned int mtu_idx;
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int wscale;
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PDBG("%s ep %p\n", __func__, ep);
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skb = get_skb(NULL, sizeof(*req), GFP_KERNEL);
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if (!skb) {
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printk(KERN_ERR MOD "%s - failed to alloc skb.\n",
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__func__);
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return -ENOMEM;
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}
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mtu_idx = find_best_mtu(T3C_DATA(ep->com.tdev), dst_mtu(ep->dst));
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wscale = compute_wscale(rcv_win);
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opt0h = V_NAGLE(0) |
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V_NO_CONG(nocong) |
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V_KEEP_ALIVE(1) |
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F_TCAM_BYPASS |
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V_WND_SCALE(wscale) |
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V_MSS_IDX(mtu_idx) |
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V_L2T_IDX(ep->l2t->idx) | V_TX_CHANNEL(ep->l2t->smt_idx);
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opt0l = V_TOS((ep->tos >> 2) & M_TOS) | V_RCV_BUFSIZ(rcv_win>>10);
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opt2 = F_RX_COALESCE_VALID | V_RX_COALESCE(0) | V_FLAVORS_VALID(1) |
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V_CONG_CONTROL_FLAVOR(cong_flavor);
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skb->priority = CPL_PRIORITY_SETUP;
|
|
set_arp_failure_handler(skb, act_open_req_arp_failure);
|
|
|
|
req = (struct cpl_act_open_req *) skb_put(skb, sizeof(*req));
|
|
req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
|
|
OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_ACT_OPEN_REQ, ep->atid));
|
|
req->local_port = ep->com.local_addr.sin_port;
|
|
req->peer_port = ep->com.remote_addr.sin_port;
|
|
req->local_ip = ep->com.local_addr.sin_addr.s_addr;
|
|
req->peer_ip = ep->com.remote_addr.sin_addr.s_addr;
|
|
req->opt0h = htonl(opt0h);
|
|
req->opt0l = htonl(opt0l);
|
|
req->params = 0;
|
|
req->opt2 = htonl(opt2);
|
|
return iwch_l2t_send(ep->com.tdev, skb, ep->l2t);
|
|
}
|
|
|
|
static void send_mpa_req(struct iwch_ep *ep, struct sk_buff *skb)
|
|
{
|
|
int mpalen;
|
|
struct tx_data_wr *req;
|
|
struct mpa_message *mpa;
|
|
int len;
|
|
|
|
PDBG("%s ep %p pd_len %d\n", __func__, ep, ep->plen);
|
|
|
|
BUG_ON(skb_cloned(skb));
|
|
|
|
mpalen = sizeof(*mpa) + ep->plen;
|
|
if (skb->data + mpalen + sizeof(*req) > skb_end_pointer(skb)) {
|
|
kfree_skb(skb);
|
|
skb=alloc_skb(mpalen + sizeof(*req), GFP_KERNEL);
|
|
if (!skb) {
|
|
connect_reply_upcall(ep, -ENOMEM);
|
|
return;
|
|
}
|
|
}
|
|
skb_trim(skb, 0);
|
|
skb_reserve(skb, sizeof(*req));
|
|
skb_put(skb, mpalen);
|
|
skb->priority = CPL_PRIORITY_DATA;
|
|
mpa = (struct mpa_message *) skb->data;
|
|
memset(mpa, 0, sizeof(*mpa));
|
|
memcpy(mpa->key, MPA_KEY_REQ, sizeof(mpa->key));
|
|
mpa->flags = (crc_enabled ? MPA_CRC : 0) |
|
|
(markers_enabled ? MPA_MARKERS : 0);
|
|
mpa->private_data_size = htons(ep->plen);
|
|
mpa->revision = mpa_rev;
|
|
|
|
if (ep->plen)
|
|
memcpy(mpa->private_data, ep->mpa_pkt + sizeof(*mpa), ep->plen);
|
|
|
|
/*
|
|
* Reference the mpa skb. This ensures the data area
|
|
* will remain in memory until the hw acks the tx.
|
|
* Function tx_ack() will deref it.
|
|
*/
|
|
skb_get(skb);
|
|
set_arp_failure_handler(skb, arp_failure_discard);
|
|
skb_reset_transport_header(skb);
|
|
len = skb->len;
|
|
req = (struct tx_data_wr *) skb_push(skb, sizeof(*req));
|
|
req->wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_TX_DATA)|F_WR_COMPL);
|
|
req->wr_lo = htonl(V_WR_TID(ep->hwtid));
|
|
req->len = htonl(len);
|
|
req->param = htonl(V_TX_PORT(ep->l2t->smt_idx) |
|
|
V_TX_SNDBUF(snd_win>>15));
|
|
req->flags = htonl(F_TX_INIT);
|
|
req->sndseq = htonl(ep->snd_seq);
|
|
BUG_ON(ep->mpa_skb);
|
|
ep->mpa_skb = skb;
|
|
iwch_l2t_send(ep->com.tdev, skb, ep->l2t);
|
|
start_ep_timer(ep);
|
|
state_set(&ep->com, MPA_REQ_SENT);
|
|
return;
|
|
}
|
|
|
|
static int send_mpa_reject(struct iwch_ep *ep, const void *pdata, u8 plen)
|
|
{
|
|
int mpalen;
|
|
struct tx_data_wr *req;
|
|
struct mpa_message *mpa;
|
|
struct sk_buff *skb;
|
|
|
|
PDBG("%s ep %p plen %d\n", __func__, ep, plen);
|
|
|
|
mpalen = sizeof(*mpa) + plen;
|
|
|
|
skb = get_skb(NULL, mpalen + sizeof(*req), GFP_KERNEL);
|
|
if (!skb) {
|
|
printk(KERN_ERR MOD "%s - cannot alloc skb!\n", __func__);
|
|
return -ENOMEM;
|
|
}
|
|
skb_reserve(skb, sizeof(*req));
|
|
mpa = (struct mpa_message *) skb_put(skb, mpalen);
|
|
memset(mpa, 0, sizeof(*mpa));
|
|
memcpy(mpa->key, MPA_KEY_REP, sizeof(mpa->key));
|
|
mpa->flags = MPA_REJECT;
|
|
mpa->revision = mpa_rev;
|
|
mpa->private_data_size = htons(plen);
|
|
if (plen)
|
|
memcpy(mpa->private_data, pdata, plen);
|
|
|
|
/*
|
|
* Reference the mpa skb again. This ensures the data area
|
|
* will remain in memory until the hw acks the tx.
|
|
* Function tx_ack() will deref it.
|
|
*/
|
|
skb_get(skb);
|
|
skb->priority = CPL_PRIORITY_DATA;
|
|
set_arp_failure_handler(skb, arp_failure_discard);
|
|
skb_reset_transport_header(skb);
|
|
req = (struct tx_data_wr *) skb_push(skb, sizeof(*req));
|
|
req->wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_TX_DATA)|F_WR_COMPL);
|
|
req->wr_lo = htonl(V_WR_TID(ep->hwtid));
|
|
req->len = htonl(mpalen);
|
|
req->param = htonl(V_TX_PORT(ep->l2t->smt_idx) |
|
|
V_TX_SNDBUF(snd_win>>15));
|
|
req->flags = htonl(F_TX_INIT);
|
|
req->sndseq = htonl(ep->snd_seq);
|
|
BUG_ON(ep->mpa_skb);
|
|
ep->mpa_skb = skb;
|
|
return iwch_l2t_send(ep->com.tdev, skb, ep->l2t);
|
|
}
|
|
|
|
static int send_mpa_reply(struct iwch_ep *ep, const void *pdata, u8 plen)
|
|
{
|
|
int mpalen;
|
|
struct tx_data_wr *req;
|
|
struct mpa_message *mpa;
|
|
int len;
|
|
struct sk_buff *skb;
|
|
|
|
PDBG("%s ep %p plen %d\n", __func__, ep, plen);
|
|
|
|
mpalen = sizeof(*mpa) + plen;
|
|
|
|
skb = get_skb(NULL, mpalen + sizeof(*req), GFP_KERNEL);
|
|
if (!skb) {
|
|
printk(KERN_ERR MOD "%s - cannot alloc skb!\n", __func__);
|
|
return -ENOMEM;
|
|
}
|
|
skb->priority = CPL_PRIORITY_DATA;
|
|
skb_reserve(skb, sizeof(*req));
|
|
mpa = (struct mpa_message *) skb_put(skb, mpalen);
|
|
memset(mpa, 0, sizeof(*mpa));
|
|
memcpy(mpa->key, MPA_KEY_REP, sizeof(mpa->key));
|
|
mpa->flags = (ep->mpa_attr.crc_enabled ? MPA_CRC : 0) |
|
|
(markers_enabled ? MPA_MARKERS : 0);
|
|
mpa->revision = mpa_rev;
|
|
mpa->private_data_size = htons(plen);
|
|
if (plen)
|
|
memcpy(mpa->private_data, pdata, plen);
|
|
|
|
/*
|
|
* Reference the mpa skb. This ensures the data area
|
|
* will remain in memory until the hw acks the tx.
|
|
* Function tx_ack() will deref it.
|
|
*/
|
|
skb_get(skb);
|
|
set_arp_failure_handler(skb, arp_failure_discard);
|
|
skb_reset_transport_header(skb);
|
|
len = skb->len;
|
|
req = (struct tx_data_wr *) skb_push(skb, sizeof(*req));
|
|
req->wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_TX_DATA)|F_WR_COMPL);
|
|
req->wr_lo = htonl(V_WR_TID(ep->hwtid));
|
|
req->len = htonl(len);
|
|
req->param = htonl(V_TX_PORT(ep->l2t->smt_idx) |
|
|
V_TX_SNDBUF(snd_win>>15));
|
|
req->flags = htonl(F_TX_INIT);
|
|
req->sndseq = htonl(ep->snd_seq);
|
|
ep->mpa_skb = skb;
|
|
state_set(&ep->com, MPA_REP_SENT);
|
|
return iwch_l2t_send(ep->com.tdev, skb, ep->l2t);
|
|
}
|
|
|
|
static int act_establish(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
|
|
{
|
|
struct iwch_ep *ep = ctx;
|
|
struct cpl_act_establish *req = cplhdr(skb);
|
|
unsigned int tid = GET_TID(req);
|
|
|
|
PDBG("%s ep %p tid %d\n", __func__, ep, tid);
|
|
|
|
dst_confirm(ep->dst);
|
|
|
|
/* setup the hwtid for this connection */
|
|
ep->hwtid = tid;
|
|
cxgb3_insert_tid(ep->com.tdev, &t3c_client, ep, tid);
|
|
|
|
ep->snd_seq = ntohl(req->snd_isn);
|
|
ep->rcv_seq = ntohl(req->rcv_isn);
|
|
|
|
set_emss(ep, ntohs(req->tcp_opt));
|
|
|
|
/* dealloc the atid */
|
|
cxgb3_free_atid(ep->com.tdev, ep->atid);
|
|
|
|
/* start MPA negotiation */
|
|
send_mpa_req(ep, skb);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void abort_connection(struct iwch_ep *ep, struct sk_buff *skb, gfp_t gfp)
|
|
{
|
|
PDBG("%s ep %p\n", __FILE__, ep);
|
|
state_set(&ep->com, ABORTING);
|
|
send_abort(ep, skb, gfp);
|
|
}
|
|
|
|
static void close_complete_upcall(struct iwch_ep *ep)
|
|
{
|
|
struct iw_cm_event event;
|
|
|
|
PDBG("%s ep %p\n", __func__, ep);
|
|
memset(&event, 0, sizeof(event));
|
|
event.event = IW_CM_EVENT_CLOSE;
|
|
if (ep->com.cm_id) {
|
|
PDBG("close complete delivered ep %p cm_id %p tid %d\n",
|
|
ep, ep->com.cm_id, ep->hwtid);
|
|
ep->com.cm_id->event_handler(ep->com.cm_id, &event);
|
|
ep->com.cm_id->rem_ref(ep->com.cm_id);
|
|
ep->com.cm_id = NULL;
|
|
ep->com.qp = NULL;
|
|
}
|
|
}
|
|
|
|
static void peer_close_upcall(struct iwch_ep *ep)
|
|
{
|
|
struct iw_cm_event event;
|
|
|
|
PDBG("%s ep %p\n", __func__, ep);
|
|
memset(&event, 0, sizeof(event));
|
|
event.event = IW_CM_EVENT_DISCONNECT;
|
|
if (ep->com.cm_id) {
|
|
PDBG("peer close delivered ep %p cm_id %p tid %d\n",
|
|
ep, ep->com.cm_id, ep->hwtid);
|
|
ep->com.cm_id->event_handler(ep->com.cm_id, &event);
|
|
}
|
|
}
|
|
|
|
static void peer_abort_upcall(struct iwch_ep *ep)
|
|
{
|
|
struct iw_cm_event event;
|
|
|
|
PDBG("%s ep %p\n", __func__, ep);
|
|
memset(&event, 0, sizeof(event));
|
|
event.event = IW_CM_EVENT_CLOSE;
|
|
event.status = -ECONNRESET;
|
|
if (ep->com.cm_id) {
|
|
PDBG("abort delivered ep %p cm_id %p tid %d\n", ep,
|
|
ep->com.cm_id, ep->hwtid);
|
|
ep->com.cm_id->event_handler(ep->com.cm_id, &event);
|
|
ep->com.cm_id->rem_ref(ep->com.cm_id);
|
|
ep->com.cm_id = NULL;
|
|
ep->com.qp = NULL;
|
|
}
|
|
}
|
|
|
|
static void connect_reply_upcall(struct iwch_ep *ep, int status)
|
|
{
|
|
struct iw_cm_event event;
|
|
|
|
PDBG("%s ep %p status %d\n", __func__, ep, status);
|
|
memset(&event, 0, sizeof(event));
|
|
event.event = IW_CM_EVENT_CONNECT_REPLY;
|
|
event.status = status;
|
|
event.local_addr = ep->com.local_addr;
|
|
event.remote_addr = ep->com.remote_addr;
|
|
|
|
if ((status == 0) || (status == -ECONNREFUSED)) {
|
|
event.private_data_len = ep->plen;
|
|
event.private_data = ep->mpa_pkt + sizeof(struct mpa_message);
|
|
}
|
|
if (ep->com.cm_id) {
|
|
PDBG("%s ep %p tid %d status %d\n", __func__, ep,
|
|
ep->hwtid, status);
|
|
ep->com.cm_id->event_handler(ep->com.cm_id, &event);
|
|
}
|
|
if (status < 0) {
|
|
ep->com.cm_id->rem_ref(ep->com.cm_id);
|
|
ep->com.cm_id = NULL;
|
|
ep->com.qp = NULL;
|
|
}
|
|
}
|
|
|
|
static void connect_request_upcall(struct iwch_ep *ep)
|
|
{
|
|
struct iw_cm_event event;
|
|
|
|
PDBG("%s ep %p tid %d\n", __func__, ep, ep->hwtid);
|
|
memset(&event, 0, sizeof(event));
|
|
event.event = IW_CM_EVENT_CONNECT_REQUEST;
|
|
event.local_addr = ep->com.local_addr;
|
|
event.remote_addr = ep->com.remote_addr;
|
|
event.private_data_len = ep->plen;
|
|
event.private_data = ep->mpa_pkt + sizeof(struct mpa_message);
|
|
event.provider_data = ep;
|
|
if (state_read(&ep->parent_ep->com) != DEAD) {
|
|
get_ep(&ep->com);
|
|
ep->parent_ep->com.cm_id->event_handler(
|
|
ep->parent_ep->com.cm_id,
|
|
&event);
|
|
}
|
|
put_ep(&ep->parent_ep->com);
|
|
ep->parent_ep = NULL;
|
|
}
|
|
|
|
static void established_upcall(struct iwch_ep *ep)
|
|
{
|
|
struct iw_cm_event event;
|
|
|
|
PDBG("%s ep %p\n", __func__, ep);
|
|
memset(&event, 0, sizeof(event));
|
|
event.event = IW_CM_EVENT_ESTABLISHED;
|
|
if (ep->com.cm_id) {
|
|
PDBG("%s ep %p tid %d\n", __func__, ep, ep->hwtid);
|
|
ep->com.cm_id->event_handler(ep->com.cm_id, &event);
|
|
}
|
|
}
|
|
|
|
static int update_rx_credits(struct iwch_ep *ep, u32 credits)
|
|
{
|
|
struct cpl_rx_data_ack *req;
|
|
struct sk_buff *skb;
|
|
|
|
PDBG("%s ep %p credits %u\n", __func__, ep, credits);
|
|
skb = get_skb(NULL, sizeof(*req), GFP_KERNEL);
|
|
if (!skb) {
|
|
printk(KERN_ERR MOD "update_rx_credits - cannot alloc skb!\n");
|
|
return 0;
|
|
}
|
|
|
|
req = (struct cpl_rx_data_ack *) skb_put(skb, sizeof(*req));
|
|
req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
|
|
OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_RX_DATA_ACK, ep->hwtid));
|
|
req->credit_dack = htonl(V_RX_CREDITS(credits) | V_RX_FORCE_ACK(1));
|
|
skb->priority = CPL_PRIORITY_ACK;
|
|
iwch_cxgb3_ofld_send(ep->com.tdev, skb);
|
|
return credits;
|
|
}
|
|
|
|
static void process_mpa_reply(struct iwch_ep *ep, struct sk_buff *skb)
|
|
{
|
|
struct mpa_message *mpa;
|
|
u16 plen;
|
|
struct iwch_qp_attributes attrs;
|
|
enum iwch_qp_attr_mask mask;
|
|
int err;
|
|
|
|
PDBG("%s ep %p\n", __func__, ep);
|
|
|
|
/*
|
|
* Stop mpa timer. If it expired, then the state has
|
|
* changed and we bail since ep_timeout already aborted
|
|
* the connection.
|
|
*/
|
|
stop_ep_timer(ep);
|
|
if (state_read(&ep->com) != MPA_REQ_SENT)
|
|
return;
|
|
|
|
/*
|
|
* If we get more than the supported amount of private data
|
|
* then we must fail this connection.
|
|
*/
|
|
if (ep->mpa_pkt_len + skb->len > sizeof(ep->mpa_pkt)) {
|
|
err = -EINVAL;
|
|
goto err;
|
|
}
|
|
|
|
/*
|
|
* copy the new data into our accumulation buffer.
|
|
*/
|
|
skb_copy_from_linear_data(skb, &(ep->mpa_pkt[ep->mpa_pkt_len]),
|
|
skb->len);
|
|
ep->mpa_pkt_len += skb->len;
|
|
|
|
/*
|
|
* if we don't even have the mpa message, then bail.
|
|
*/
|
|
if (ep->mpa_pkt_len < sizeof(*mpa))
|
|
return;
|
|
mpa = (struct mpa_message *) ep->mpa_pkt;
|
|
|
|
/* Validate MPA header. */
|
|
if (mpa->revision != mpa_rev) {
|
|
err = -EPROTO;
|
|
goto err;
|
|
}
|
|
if (memcmp(mpa->key, MPA_KEY_REP, sizeof(mpa->key))) {
|
|
err = -EPROTO;
|
|
goto err;
|
|
}
|
|
|
|
plen = ntohs(mpa->private_data_size);
|
|
|
|
/*
|
|
* Fail if there's too much private data.
|
|
*/
|
|
if (plen > MPA_MAX_PRIVATE_DATA) {
|
|
err = -EPROTO;
|
|
goto err;
|
|
}
|
|
|
|
/*
|
|
* If plen does not account for pkt size
|
|
*/
|
|
if (ep->mpa_pkt_len > (sizeof(*mpa) + plen)) {
|
|
err = -EPROTO;
|
|
goto err;
|
|
}
|
|
|
|
ep->plen = (u8) plen;
|
|
|
|
/*
|
|
* If we don't have all the pdata yet, then bail.
|
|
* We'll continue process when more data arrives.
|
|
*/
|
|
if (ep->mpa_pkt_len < (sizeof(*mpa) + plen))
|
|
return;
|
|
|
|
if (mpa->flags & MPA_REJECT) {
|
|
err = -ECONNREFUSED;
|
|
goto err;
|
|
}
|
|
|
|
/*
|
|
* If we get here we have accumulated the entire mpa
|
|
* start reply message including private data. And
|
|
* the MPA header is valid.
|
|
*/
|
|
state_set(&ep->com, FPDU_MODE);
|
|
ep->mpa_attr.initiator = 1;
|
|
ep->mpa_attr.crc_enabled = (mpa->flags & MPA_CRC) | crc_enabled ? 1 : 0;
|
|
ep->mpa_attr.recv_marker_enabled = markers_enabled;
|
|
ep->mpa_attr.xmit_marker_enabled = mpa->flags & MPA_MARKERS ? 1 : 0;
|
|
ep->mpa_attr.version = mpa_rev;
|
|
PDBG("%s - crc_enabled=%d, recv_marker_enabled=%d, "
|
|
"xmit_marker_enabled=%d, version=%d\n", __func__,
|
|
ep->mpa_attr.crc_enabled, ep->mpa_attr.recv_marker_enabled,
|
|
ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version);
|
|
|
|
attrs.mpa_attr = ep->mpa_attr;
|
|
attrs.max_ird = ep->ird;
|
|
attrs.max_ord = ep->ord;
|
|
attrs.llp_stream_handle = ep;
|
|
attrs.next_state = IWCH_QP_STATE_RTS;
|
|
|
|
mask = IWCH_QP_ATTR_NEXT_STATE |
|
|
IWCH_QP_ATTR_LLP_STREAM_HANDLE | IWCH_QP_ATTR_MPA_ATTR |
|
|
IWCH_QP_ATTR_MAX_IRD | IWCH_QP_ATTR_MAX_ORD;
|
|
|
|
/* bind QP and TID with INIT_WR */
|
|
err = iwch_modify_qp(ep->com.qp->rhp,
|
|
ep->com.qp, mask, &attrs, 1);
|
|
if (err)
|
|
goto err;
|
|
|
|
if (peer2peer && iwch_rqes_posted(ep->com.qp) == 0) {
|
|
iwch_post_zb_read(ep->com.qp);
|
|
}
|
|
|
|
goto out;
|
|
err:
|
|
abort_connection(ep, skb, GFP_KERNEL);
|
|
out:
|
|
connect_reply_upcall(ep, err);
|
|
return;
|
|
}
|
|
|
|
static void process_mpa_request(struct iwch_ep *ep, struct sk_buff *skb)
|
|
{
|
|
struct mpa_message *mpa;
|
|
u16 plen;
|
|
|
|
PDBG("%s ep %p\n", __func__, ep);
|
|
|
|
/*
|
|
* Stop mpa timer. If it expired, then the state has
|
|
* changed and we bail since ep_timeout already aborted
|
|
* the connection.
|
|
*/
|
|
stop_ep_timer(ep);
|
|
if (state_read(&ep->com) != MPA_REQ_WAIT)
|
|
return;
|
|
|
|
/*
|
|
* If we get more than the supported amount of private data
|
|
* then we must fail this connection.
|
|
*/
|
|
if (ep->mpa_pkt_len + skb->len > sizeof(ep->mpa_pkt)) {
|
|
abort_connection(ep, skb, GFP_KERNEL);
|
|
return;
|
|
}
|
|
|
|
PDBG("%s enter (%s line %u)\n", __func__, __FILE__, __LINE__);
|
|
|
|
/*
|
|
* Copy the new data into our accumulation buffer.
|
|
*/
|
|
skb_copy_from_linear_data(skb, &(ep->mpa_pkt[ep->mpa_pkt_len]),
|
|
skb->len);
|
|
ep->mpa_pkt_len += skb->len;
|
|
|
|
/*
|
|
* If we don't even have the mpa message, then bail.
|
|
* We'll continue process when more data arrives.
|
|
*/
|
|
if (ep->mpa_pkt_len < sizeof(*mpa))
|
|
return;
|
|
PDBG("%s enter (%s line %u)\n", __func__, __FILE__, __LINE__);
|
|
mpa = (struct mpa_message *) ep->mpa_pkt;
|
|
|
|
/*
|
|
* Validate MPA Header.
|
|
*/
|
|
if (mpa->revision != mpa_rev) {
|
|
abort_connection(ep, skb, GFP_KERNEL);
|
|
return;
|
|
}
|
|
|
|
if (memcmp(mpa->key, MPA_KEY_REQ, sizeof(mpa->key))) {
|
|
abort_connection(ep, skb, GFP_KERNEL);
|
|
return;
|
|
}
|
|
|
|
plen = ntohs(mpa->private_data_size);
|
|
|
|
/*
|
|
* Fail if there's too much private data.
|
|
*/
|
|
if (plen > MPA_MAX_PRIVATE_DATA) {
|
|
abort_connection(ep, skb, GFP_KERNEL);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* If plen does not account for pkt size
|
|
*/
|
|
if (ep->mpa_pkt_len > (sizeof(*mpa) + plen)) {
|
|
abort_connection(ep, skb, GFP_KERNEL);
|
|
return;
|
|
}
|
|
ep->plen = (u8) plen;
|
|
|
|
/*
|
|
* If we don't have all the pdata yet, then bail.
|
|
*/
|
|
if (ep->mpa_pkt_len < (sizeof(*mpa) + plen))
|
|
return;
|
|
|
|
/*
|
|
* If we get here we have accumulated the entire mpa
|
|
* start reply message including private data.
|
|
*/
|
|
ep->mpa_attr.initiator = 0;
|
|
ep->mpa_attr.crc_enabled = (mpa->flags & MPA_CRC) | crc_enabled ? 1 : 0;
|
|
ep->mpa_attr.recv_marker_enabled = markers_enabled;
|
|
ep->mpa_attr.xmit_marker_enabled = mpa->flags & MPA_MARKERS ? 1 : 0;
|
|
ep->mpa_attr.version = mpa_rev;
|
|
PDBG("%s - crc_enabled=%d, recv_marker_enabled=%d, "
|
|
"xmit_marker_enabled=%d, version=%d\n", __func__,
|
|
ep->mpa_attr.crc_enabled, ep->mpa_attr.recv_marker_enabled,
|
|
ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version);
|
|
|
|
state_set(&ep->com, MPA_REQ_RCVD);
|
|
|
|
/* drive upcall */
|
|
connect_request_upcall(ep);
|
|
return;
|
|
}
|
|
|
|
static int rx_data(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
|
|
{
|
|
struct iwch_ep *ep = ctx;
|
|
struct cpl_rx_data *hdr = cplhdr(skb);
|
|
unsigned int dlen = ntohs(hdr->len);
|
|
|
|
PDBG("%s ep %p dlen %u\n", __func__, ep, dlen);
|
|
|
|
skb_pull(skb, sizeof(*hdr));
|
|
skb_trim(skb, dlen);
|
|
|
|
ep->rcv_seq += dlen;
|
|
BUG_ON(ep->rcv_seq != (ntohl(hdr->seq) + dlen));
|
|
|
|
switch (state_read(&ep->com)) {
|
|
case MPA_REQ_SENT:
|
|
process_mpa_reply(ep, skb);
|
|
break;
|
|
case MPA_REQ_WAIT:
|
|
process_mpa_request(ep, skb);
|
|
break;
|
|
case MPA_REP_SENT:
|
|
break;
|
|
default:
|
|
printk(KERN_ERR MOD "%s Unexpected streaming data."
|
|
" ep %p state %d tid %d\n",
|
|
__func__, ep, state_read(&ep->com), ep->hwtid);
|
|
|
|
/*
|
|
* The ep will timeout and inform the ULP of the failure.
|
|
* See ep_timeout().
|
|
*/
|
|
break;
|
|
}
|
|
|
|
/* update RX credits */
|
|
update_rx_credits(ep, dlen);
|
|
|
|
return CPL_RET_BUF_DONE;
|
|
}
|
|
|
|
/*
|
|
* Upcall from the adapter indicating data has been transmitted.
|
|
* For us its just the single MPA request or reply. We can now free
|
|
* the skb holding the mpa message.
|
|
*/
|
|
static int tx_ack(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
|
|
{
|
|
struct iwch_ep *ep = ctx;
|
|
struct cpl_wr_ack *hdr = cplhdr(skb);
|
|
unsigned int credits = ntohs(hdr->credits);
|
|
|
|
PDBG("%s ep %p credits %u\n", __func__, ep, credits);
|
|
|
|
if (credits == 0) {
|
|
PDBG("%s 0 credit ack ep %p state %u\n",
|
|
__func__, ep, state_read(&ep->com));
|
|
return CPL_RET_BUF_DONE;
|
|
}
|
|
|
|
BUG_ON(credits != 1);
|
|
dst_confirm(ep->dst);
|
|
if (!ep->mpa_skb) {
|
|
PDBG("%s rdma_init wr_ack ep %p state %u\n",
|
|
__func__, ep, state_read(&ep->com));
|
|
if (ep->mpa_attr.initiator) {
|
|
PDBG("%s initiator ep %p state %u\n",
|
|
__func__, ep, state_read(&ep->com));
|
|
if (peer2peer)
|
|
iwch_post_zb_read(ep->com.qp);
|
|
} else {
|
|
PDBG("%s responder ep %p state %u\n",
|
|
__func__, ep, state_read(&ep->com));
|
|
ep->com.rpl_done = 1;
|
|
wake_up(&ep->com.waitq);
|
|
}
|
|
} else {
|
|
PDBG("%s lsm ack ep %p state %u freeing skb\n",
|
|
__func__, ep, state_read(&ep->com));
|
|
kfree_skb(ep->mpa_skb);
|
|
ep->mpa_skb = NULL;
|
|
}
|
|
return CPL_RET_BUF_DONE;
|
|
}
|
|
|
|
static int abort_rpl(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
|
|
{
|
|
struct iwch_ep *ep = ctx;
|
|
unsigned long flags;
|
|
int release = 0;
|
|
|
|
PDBG("%s ep %p\n", __func__, ep);
|
|
BUG_ON(!ep);
|
|
|
|
/*
|
|
* We get 2 abort replies from the HW. The first one must
|
|
* be ignored except for scribbling that we need one more.
|
|
*/
|
|
if (!test_and_set_bit(ABORT_REQ_IN_PROGRESS, &ep->com.flags)) {
|
|
return CPL_RET_BUF_DONE;
|
|
}
|
|
|
|
spin_lock_irqsave(&ep->com.lock, flags);
|
|
switch (ep->com.state) {
|
|
case ABORTING:
|
|
close_complete_upcall(ep);
|
|
__state_set(&ep->com, DEAD);
|
|
release = 1;
|
|
break;
|
|
default:
|
|
printk(KERN_ERR "%s ep %p state %d\n",
|
|
__func__, ep, ep->com.state);
|
|
break;
|
|
}
|
|
spin_unlock_irqrestore(&ep->com.lock, flags);
|
|
|
|
if (release)
|
|
release_ep_resources(ep);
|
|
return CPL_RET_BUF_DONE;
|
|
}
|
|
|
|
/*
|
|
* Return whether a failed active open has allocated a TID
|
|
*/
|
|
static inline int act_open_has_tid(int status)
|
|
{
|
|
return status != CPL_ERR_TCAM_FULL && status != CPL_ERR_CONN_EXIST &&
|
|
status != CPL_ERR_ARP_MISS;
|
|
}
|
|
|
|
static int act_open_rpl(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
|
|
{
|
|
struct iwch_ep *ep = ctx;
|
|
struct cpl_act_open_rpl *rpl = cplhdr(skb);
|
|
|
|
PDBG("%s ep %p status %u errno %d\n", __func__, ep, rpl->status,
|
|
status2errno(rpl->status));
|
|
connect_reply_upcall(ep, status2errno(rpl->status));
|
|
state_set(&ep->com, DEAD);
|
|
if (ep->com.tdev->type != T3A && act_open_has_tid(rpl->status))
|
|
release_tid(ep->com.tdev, GET_TID(rpl), NULL);
|
|
cxgb3_free_atid(ep->com.tdev, ep->atid);
|
|
dst_release(ep->dst);
|
|
l2t_release(L2DATA(ep->com.tdev), ep->l2t);
|
|
put_ep(&ep->com);
|
|
return CPL_RET_BUF_DONE;
|
|
}
|
|
|
|
static int listen_start(struct iwch_listen_ep *ep)
|
|
{
|
|
struct sk_buff *skb;
|
|
struct cpl_pass_open_req *req;
|
|
|
|
PDBG("%s ep %p\n", __func__, ep);
|
|
skb = get_skb(NULL, sizeof(*req), GFP_KERNEL);
|
|
if (!skb) {
|
|
printk(KERN_ERR MOD "t3c_listen_start failed to alloc skb!\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
req = (struct cpl_pass_open_req *) skb_put(skb, sizeof(*req));
|
|
req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
|
|
OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_PASS_OPEN_REQ, ep->stid));
|
|
req->local_port = ep->com.local_addr.sin_port;
|
|
req->local_ip = ep->com.local_addr.sin_addr.s_addr;
|
|
req->peer_port = 0;
|
|
req->peer_ip = 0;
|
|
req->peer_netmask = 0;
|
|
req->opt0h = htonl(F_DELACK | F_TCAM_BYPASS);
|
|
req->opt0l = htonl(V_RCV_BUFSIZ(rcv_win>>10));
|
|
req->opt1 = htonl(V_CONN_POLICY(CPL_CONN_POLICY_ASK));
|
|
|
|
skb->priority = 1;
|
|
return iwch_cxgb3_ofld_send(ep->com.tdev, skb);
|
|
}
|
|
|
|
static int pass_open_rpl(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
|
|
{
|
|
struct iwch_listen_ep *ep = ctx;
|
|
struct cpl_pass_open_rpl *rpl = cplhdr(skb);
|
|
|
|
PDBG("%s ep %p status %d error %d\n", __func__, ep,
|
|
rpl->status, status2errno(rpl->status));
|
|
ep->com.rpl_err = status2errno(rpl->status);
|
|
ep->com.rpl_done = 1;
|
|
wake_up(&ep->com.waitq);
|
|
|
|
return CPL_RET_BUF_DONE;
|
|
}
|
|
|
|
static int listen_stop(struct iwch_listen_ep *ep)
|
|
{
|
|
struct sk_buff *skb;
|
|
struct cpl_close_listserv_req *req;
|
|
|
|
PDBG("%s ep %p\n", __func__, ep);
|
|
skb = get_skb(NULL, sizeof(*req), GFP_KERNEL);
|
|
if (!skb) {
|
|
printk(KERN_ERR MOD "%s - failed to alloc skb\n", __func__);
|
|
return -ENOMEM;
|
|
}
|
|
req = (struct cpl_close_listserv_req *) skb_put(skb, sizeof(*req));
|
|
req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
|
|
req->cpu_idx = 0;
|
|
OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_CLOSE_LISTSRV_REQ, ep->stid));
|
|
skb->priority = 1;
|
|
return iwch_cxgb3_ofld_send(ep->com.tdev, skb);
|
|
}
|
|
|
|
static int close_listsrv_rpl(struct t3cdev *tdev, struct sk_buff *skb,
|
|
void *ctx)
|
|
{
|
|
struct iwch_listen_ep *ep = ctx;
|
|
struct cpl_close_listserv_rpl *rpl = cplhdr(skb);
|
|
|
|
PDBG("%s ep %p\n", __func__, ep);
|
|
ep->com.rpl_err = status2errno(rpl->status);
|
|
ep->com.rpl_done = 1;
|
|
wake_up(&ep->com.waitq);
|
|
return CPL_RET_BUF_DONE;
|
|
}
|
|
|
|
static void accept_cr(struct iwch_ep *ep, __be32 peer_ip, struct sk_buff *skb)
|
|
{
|
|
struct cpl_pass_accept_rpl *rpl;
|
|
unsigned int mtu_idx;
|
|
u32 opt0h, opt0l, opt2;
|
|
int wscale;
|
|
|
|
PDBG("%s ep %p\n", __func__, ep);
|
|
BUG_ON(skb_cloned(skb));
|
|
skb_trim(skb, sizeof(*rpl));
|
|
skb_get(skb);
|
|
mtu_idx = find_best_mtu(T3C_DATA(ep->com.tdev), dst_mtu(ep->dst));
|
|
wscale = compute_wscale(rcv_win);
|
|
opt0h = V_NAGLE(0) |
|
|
V_NO_CONG(nocong) |
|
|
V_KEEP_ALIVE(1) |
|
|
F_TCAM_BYPASS |
|
|
V_WND_SCALE(wscale) |
|
|
V_MSS_IDX(mtu_idx) |
|
|
V_L2T_IDX(ep->l2t->idx) | V_TX_CHANNEL(ep->l2t->smt_idx);
|
|
opt0l = V_TOS((ep->tos >> 2) & M_TOS) | V_RCV_BUFSIZ(rcv_win>>10);
|
|
opt2 = F_RX_COALESCE_VALID | V_RX_COALESCE(0) | V_FLAVORS_VALID(1) |
|
|
V_CONG_CONTROL_FLAVOR(cong_flavor);
|
|
|
|
rpl = cplhdr(skb);
|
|
rpl->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
|
|
OPCODE_TID(rpl) = htonl(MK_OPCODE_TID(CPL_PASS_ACCEPT_RPL, ep->hwtid));
|
|
rpl->peer_ip = peer_ip;
|
|
rpl->opt0h = htonl(opt0h);
|
|
rpl->opt0l_status = htonl(opt0l | CPL_PASS_OPEN_ACCEPT);
|
|
rpl->opt2 = htonl(opt2);
|
|
rpl->rsvd = rpl->opt2; /* workaround for HW bug */
|
|
skb->priority = CPL_PRIORITY_SETUP;
|
|
iwch_l2t_send(ep->com.tdev, skb, ep->l2t);
|
|
|
|
return;
|
|
}
|
|
|
|
static void reject_cr(struct t3cdev *tdev, u32 hwtid, __be32 peer_ip,
|
|
struct sk_buff *skb)
|
|
{
|
|
PDBG("%s t3cdev %p tid %u peer_ip %x\n", __func__, tdev, hwtid,
|
|
peer_ip);
|
|
BUG_ON(skb_cloned(skb));
|
|
skb_trim(skb, sizeof(struct cpl_tid_release));
|
|
skb_get(skb);
|
|
|
|
if (tdev->type != T3A)
|
|
release_tid(tdev, hwtid, skb);
|
|
else {
|
|
struct cpl_pass_accept_rpl *rpl;
|
|
|
|
rpl = cplhdr(skb);
|
|
skb->priority = CPL_PRIORITY_SETUP;
|
|
rpl->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
|
|
OPCODE_TID(rpl) = htonl(MK_OPCODE_TID(CPL_PASS_ACCEPT_RPL,
|
|
hwtid));
|
|
rpl->peer_ip = peer_ip;
|
|
rpl->opt0h = htonl(F_TCAM_BYPASS);
|
|
rpl->opt0l_status = htonl(CPL_PASS_OPEN_REJECT);
|
|
rpl->opt2 = 0;
|
|
rpl->rsvd = rpl->opt2;
|
|
iwch_cxgb3_ofld_send(tdev, skb);
|
|
}
|
|
}
|
|
|
|
static int pass_accept_req(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
|
|
{
|
|
struct iwch_ep *child_ep, *parent_ep = ctx;
|
|
struct cpl_pass_accept_req *req = cplhdr(skb);
|
|
unsigned int hwtid = GET_TID(req);
|
|
struct dst_entry *dst;
|
|
struct l2t_entry *l2t;
|
|
struct rtable *rt;
|
|
struct iff_mac tim;
|
|
|
|
PDBG("%s parent ep %p tid %u\n", __func__, parent_ep, hwtid);
|
|
|
|
if (state_read(&parent_ep->com) != LISTEN) {
|
|
printk(KERN_ERR "%s - listening ep not in LISTEN\n",
|
|
__func__);
|
|
goto reject;
|
|
}
|
|
|
|
/*
|
|
* Find the netdev for this connection request.
|
|
*/
|
|
tim.mac_addr = req->dst_mac;
|
|
tim.vlan_tag = ntohs(req->vlan_tag);
|
|
if (tdev->ctl(tdev, GET_IFF_FROM_MAC, &tim) < 0 || !tim.dev) {
|
|
printk(KERN_ERR "%s bad dst mac %pM\n",
|
|
__func__, req->dst_mac);
|
|
goto reject;
|
|
}
|
|
|
|
/* Find output route */
|
|
rt = find_route(tdev,
|
|
req->local_ip,
|
|
req->peer_ip,
|
|
req->local_port,
|
|
req->peer_port, G_PASS_OPEN_TOS(ntohl(req->tos_tid)));
|
|
if (!rt) {
|
|
printk(KERN_ERR MOD "%s - failed to find dst entry!\n",
|
|
__func__);
|
|
goto reject;
|
|
}
|
|
dst = &rt->dst;
|
|
l2t = t3_l2t_get(tdev, dst->neighbour, dst->neighbour->dev);
|
|
if (!l2t) {
|
|
printk(KERN_ERR MOD "%s - failed to allocate l2t entry!\n",
|
|
__func__);
|
|
dst_release(dst);
|
|
goto reject;
|
|
}
|
|
child_ep = alloc_ep(sizeof(*child_ep), GFP_KERNEL);
|
|
if (!child_ep) {
|
|
printk(KERN_ERR MOD "%s - failed to allocate ep entry!\n",
|
|
__func__);
|
|
l2t_release(L2DATA(tdev), l2t);
|
|
dst_release(dst);
|
|
goto reject;
|
|
}
|
|
state_set(&child_ep->com, CONNECTING);
|
|
child_ep->com.tdev = tdev;
|
|
child_ep->com.cm_id = NULL;
|
|
child_ep->com.local_addr.sin_family = PF_INET;
|
|
child_ep->com.local_addr.sin_port = req->local_port;
|
|
child_ep->com.local_addr.sin_addr.s_addr = req->local_ip;
|
|
child_ep->com.remote_addr.sin_family = PF_INET;
|
|
child_ep->com.remote_addr.sin_port = req->peer_port;
|
|
child_ep->com.remote_addr.sin_addr.s_addr = req->peer_ip;
|
|
get_ep(&parent_ep->com);
|
|
child_ep->parent_ep = parent_ep;
|
|
child_ep->tos = G_PASS_OPEN_TOS(ntohl(req->tos_tid));
|
|
child_ep->l2t = l2t;
|
|
child_ep->dst = dst;
|
|
child_ep->hwtid = hwtid;
|
|
init_timer(&child_ep->timer);
|
|
cxgb3_insert_tid(tdev, &t3c_client, child_ep, hwtid);
|
|
accept_cr(child_ep, req->peer_ip, skb);
|
|
goto out;
|
|
reject:
|
|
reject_cr(tdev, hwtid, req->peer_ip, skb);
|
|
out:
|
|
return CPL_RET_BUF_DONE;
|
|
}
|
|
|
|
static int pass_establish(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
|
|
{
|
|
struct iwch_ep *ep = ctx;
|
|
struct cpl_pass_establish *req = cplhdr(skb);
|
|
|
|
PDBG("%s ep %p\n", __func__, ep);
|
|
ep->snd_seq = ntohl(req->snd_isn);
|
|
ep->rcv_seq = ntohl(req->rcv_isn);
|
|
|
|
set_emss(ep, ntohs(req->tcp_opt));
|
|
|
|
dst_confirm(ep->dst);
|
|
state_set(&ep->com, MPA_REQ_WAIT);
|
|
start_ep_timer(ep);
|
|
|
|
return CPL_RET_BUF_DONE;
|
|
}
|
|
|
|
static int peer_close(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
|
|
{
|
|
struct iwch_ep *ep = ctx;
|
|
struct iwch_qp_attributes attrs;
|
|
unsigned long flags;
|
|
int disconnect = 1;
|
|
int release = 0;
|
|
|
|
PDBG("%s ep %p\n", __func__, ep);
|
|
dst_confirm(ep->dst);
|
|
|
|
spin_lock_irqsave(&ep->com.lock, flags);
|
|
switch (ep->com.state) {
|
|
case MPA_REQ_WAIT:
|
|
__state_set(&ep->com, CLOSING);
|
|
break;
|
|
case MPA_REQ_SENT:
|
|
__state_set(&ep->com, CLOSING);
|
|
connect_reply_upcall(ep, -ECONNRESET);
|
|
break;
|
|
case MPA_REQ_RCVD:
|
|
|
|
/*
|
|
* We're gonna mark this puppy DEAD, but keep
|
|
* the reference on it until the ULP accepts or
|
|
* rejects the CR. Also wake up anyone waiting
|
|
* in rdma connection migration (see iwch_accept_cr()).
|
|
*/
|
|
__state_set(&ep->com, CLOSING);
|
|
ep->com.rpl_done = 1;
|
|
ep->com.rpl_err = -ECONNRESET;
|
|
PDBG("waking up ep %p\n", ep);
|
|
wake_up(&ep->com.waitq);
|
|
break;
|
|
case MPA_REP_SENT:
|
|
__state_set(&ep->com, CLOSING);
|
|
ep->com.rpl_done = 1;
|
|
ep->com.rpl_err = -ECONNRESET;
|
|
PDBG("waking up ep %p\n", ep);
|
|
wake_up(&ep->com.waitq);
|
|
break;
|
|
case FPDU_MODE:
|
|
start_ep_timer(ep);
|
|
__state_set(&ep->com, CLOSING);
|
|
attrs.next_state = IWCH_QP_STATE_CLOSING;
|
|
iwch_modify_qp(ep->com.qp->rhp, ep->com.qp,
|
|
IWCH_QP_ATTR_NEXT_STATE, &attrs, 1);
|
|
peer_close_upcall(ep);
|
|
break;
|
|
case ABORTING:
|
|
disconnect = 0;
|
|
break;
|
|
case CLOSING:
|
|
__state_set(&ep->com, MORIBUND);
|
|
disconnect = 0;
|
|
break;
|
|
case MORIBUND:
|
|
stop_ep_timer(ep);
|
|
if (ep->com.cm_id && ep->com.qp) {
|
|
attrs.next_state = IWCH_QP_STATE_IDLE;
|
|
iwch_modify_qp(ep->com.qp->rhp, ep->com.qp,
|
|
IWCH_QP_ATTR_NEXT_STATE, &attrs, 1);
|
|
}
|
|
close_complete_upcall(ep);
|
|
__state_set(&ep->com, DEAD);
|
|
release = 1;
|
|
disconnect = 0;
|
|
break;
|
|
case DEAD:
|
|
disconnect = 0;
|
|
break;
|
|
default:
|
|
BUG_ON(1);
|
|
}
|
|
spin_unlock_irqrestore(&ep->com.lock, flags);
|
|
if (disconnect)
|
|
iwch_ep_disconnect(ep, 0, GFP_KERNEL);
|
|
if (release)
|
|
release_ep_resources(ep);
|
|
return CPL_RET_BUF_DONE;
|
|
}
|
|
|
|
/*
|
|
* Returns whether an ABORT_REQ_RSS message is a negative advice.
|
|
*/
|
|
static int is_neg_adv_abort(unsigned int status)
|
|
{
|
|
return status == CPL_ERR_RTX_NEG_ADVICE ||
|
|
status == CPL_ERR_PERSIST_NEG_ADVICE;
|
|
}
|
|
|
|
static int peer_abort(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
|
|
{
|
|
struct cpl_abort_req_rss *req = cplhdr(skb);
|
|
struct iwch_ep *ep = ctx;
|
|
struct cpl_abort_rpl *rpl;
|
|
struct sk_buff *rpl_skb;
|
|
struct iwch_qp_attributes attrs;
|
|
int ret;
|
|
int release = 0;
|
|
unsigned long flags;
|
|
|
|
if (is_neg_adv_abort(req->status)) {
|
|
PDBG("%s neg_adv_abort ep %p tid %d\n", __func__, ep,
|
|
ep->hwtid);
|
|
t3_l2t_send_event(ep->com.tdev, ep->l2t);
|
|
return CPL_RET_BUF_DONE;
|
|
}
|
|
|
|
/*
|
|
* We get 2 peer aborts from the HW. The first one must
|
|
* be ignored except for scribbling that we need one more.
|
|
*/
|
|
if (!test_and_set_bit(PEER_ABORT_IN_PROGRESS, &ep->com.flags)) {
|
|
return CPL_RET_BUF_DONE;
|
|
}
|
|
|
|
spin_lock_irqsave(&ep->com.lock, flags);
|
|
PDBG("%s ep %p state %u\n", __func__, ep, ep->com.state);
|
|
switch (ep->com.state) {
|
|
case CONNECTING:
|
|
break;
|
|
case MPA_REQ_WAIT:
|
|
stop_ep_timer(ep);
|
|
break;
|
|
case MPA_REQ_SENT:
|
|
stop_ep_timer(ep);
|
|
connect_reply_upcall(ep, -ECONNRESET);
|
|
break;
|
|
case MPA_REP_SENT:
|
|
ep->com.rpl_done = 1;
|
|
ep->com.rpl_err = -ECONNRESET;
|
|
PDBG("waking up ep %p\n", ep);
|
|
wake_up(&ep->com.waitq);
|
|
break;
|
|
case MPA_REQ_RCVD:
|
|
|
|
/*
|
|
* We're gonna mark this puppy DEAD, but keep
|
|
* the reference on it until the ULP accepts or
|
|
* rejects the CR. Also wake up anyone waiting
|
|
* in rdma connection migration (see iwch_accept_cr()).
|
|
*/
|
|
ep->com.rpl_done = 1;
|
|
ep->com.rpl_err = -ECONNRESET;
|
|
PDBG("waking up ep %p\n", ep);
|
|
wake_up(&ep->com.waitq);
|
|
break;
|
|
case MORIBUND:
|
|
case CLOSING:
|
|
stop_ep_timer(ep);
|
|
/*FALLTHROUGH*/
|
|
case FPDU_MODE:
|
|
if (ep->com.cm_id && ep->com.qp) {
|
|
attrs.next_state = IWCH_QP_STATE_ERROR;
|
|
ret = iwch_modify_qp(ep->com.qp->rhp,
|
|
ep->com.qp, IWCH_QP_ATTR_NEXT_STATE,
|
|
&attrs, 1);
|
|
if (ret)
|
|
printk(KERN_ERR MOD
|
|
"%s - qp <- error failed!\n",
|
|
__func__);
|
|
}
|
|
peer_abort_upcall(ep);
|
|
break;
|
|
case ABORTING:
|
|
break;
|
|
case DEAD:
|
|
PDBG("%s PEER_ABORT IN DEAD STATE!!!!\n", __func__);
|
|
spin_unlock_irqrestore(&ep->com.lock, flags);
|
|
return CPL_RET_BUF_DONE;
|
|
default:
|
|
BUG_ON(1);
|
|
break;
|
|
}
|
|
dst_confirm(ep->dst);
|
|
if (ep->com.state != ABORTING) {
|
|
__state_set(&ep->com, DEAD);
|
|
release = 1;
|
|
}
|
|
spin_unlock_irqrestore(&ep->com.lock, flags);
|
|
|
|
rpl_skb = get_skb(skb, sizeof(*rpl), GFP_KERNEL);
|
|
if (!rpl_skb) {
|
|
printk(KERN_ERR MOD "%s - cannot allocate skb!\n",
|
|
__func__);
|
|
release = 1;
|
|
goto out;
|
|
}
|
|
rpl_skb->priority = CPL_PRIORITY_DATA;
|
|
rpl = (struct cpl_abort_rpl *) skb_put(rpl_skb, sizeof(*rpl));
|
|
rpl->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_HOST_ABORT_CON_RPL));
|
|
rpl->wr.wr_lo = htonl(V_WR_TID(ep->hwtid));
|
|
OPCODE_TID(rpl) = htonl(MK_OPCODE_TID(CPL_ABORT_RPL, ep->hwtid));
|
|
rpl->cmd = CPL_ABORT_NO_RST;
|
|
iwch_cxgb3_ofld_send(ep->com.tdev, rpl_skb);
|
|
out:
|
|
if (release)
|
|
release_ep_resources(ep);
|
|
return CPL_RET_BUF_DONE;
|
|
}
|
|
|
|
static int close_con_rpl(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
|
|
{
|
|
struct iwch_ep *ep = ctx;
|
|
struct iwch_qp_attributes attrs;
|
|
unsigned long flags;
|
|
int release = 0;
|
|
|
|
PDBG("%s ep %p\n", __func__, ep);
|
|
BUG_ON(!ep);
|
|
|
|
/* The cm_id may be null if we failed to connect */
|
|
spin_lock_irqsave(&ep->com.lock, flags);
|
|
switch (ep->com.state) {
|
|
case CLOSING:
|
|
__state_set(&ep->com, MORIBUND);
|
|
break;
|
|
case MORIBUND:
|
|
stop_ep_timer(ep);
|
|
if ((ep->com.cm_id) && (ep->com.qp)) {
|
|
attrs.next_state = IWCH_QP_STATE_IDLE;
|
|
iwch_modify_qp(ep->com.qp->rhp,
|
|
ep->com.qp,
|
|
IWCH_QP_ATTR_NEXT_STATE,
|
|
&attrs, 1);
|
|
}
|
|
close_complete_upcall(ep);
|
|
__state_set(&ep->com, DEAD);
|
|
release = 1;
|
|
break;
|
|
case ABORTING:
|
|
case DEAD:
|
|
break;
|
|
default:
|
|
BUG_ON(1);
|
|
break;
|
|
}
|
|
spin_unlock_irqrestore(&ep->com.lock, flags);
|
|
if (release)
|
|
release_ep_resources(ep);
|
|
return CPL_RET_BUF_DONE;
|
|
}
|
|
|
|
/*
|
|
* T3A does 3 things when a TERM is received:
|
|
* 1) send up a CPL_RDMA_TERMINATE message with the TERM packet
|
|
* 2) generate an async event on the QP with the TERMINATE opcode
|
|
* 3) post a TERMINATE opcde cqe into the associated CQ.
|
|
*
|
|
* For (1), we save the message in the qp for later consumer consumption.
|
|
* For (2), we move the QP into TERMINATE, post a QP event and disconnect.
|
|
* For (3), we toss the CQE in cxio_poll_cq().
|
|
*
|
|
* terminate() handles case (1)...
|
|
*/
|
|
static int terminate(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
|
|
{
|
|
struct iwch_ep *ep = ctx;
|
|
|
|
if (state_read(&ep->com) != FPDU_MODE)
|
|
return CPL_RET_BUF_DONE;
|
|
|
|
PDBG("%s ep %p\n", __func__, ep);
|
|
skb_pull(skb, sizeof(struct cpl_rdma_terminate));
|
|
PDBG("%s saving %d bytes of term msg\n", __func__, skb->len);
|
|
skb_copy_from_linear_data(skb, ep->com.qp->attr.terminate_buffer,
|
|
skb->len);
|
|
ep->com.qp->attr.terminate_msg_len = skb->len;
|
|
ep->com.qp->attr.is_terminate_local = 0;
|
|
return CPL_RET_BUF_DONE;
|
|
}
|
|
|
|
static int ec_status(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
|
|
{
|
|
struct cpl_rdma_ec_status *rep = cplhdr(skb);
|
|
struct iwch_ep *ep = ctx;
|
|
|
|
PDBG("%s ep %p tid %u status %d\n", __func__, ep, ep->hwtid,
|
|
rep->status);
|
|
if (rep->status) {
|
|
struct iwch_qp_attributes attrs;
|
|
|
|
printk(KERN_ERR MOD "%s BAD CLOSE - Aborting tid %u\n",
|
|
__func__, ep->hwtid);
|
|
stop_ep_timer(ep);
|
|
attrs.next_state = IWCH_QP_STATE_ERROR;
|
|
iwch_modify_qp(ep->com.qp->rhp,
|
|
ep->com.qp, IWCH_QP_ATTR_NEXT_STATE,
|
|
&attrs, 1);
|
|
abort_connection(ep, NULL, GFP_KERNEL);
|
|
}
|
|
return CPL_RET_BUF_DONE;
|
|
}
|
|
|
|
static void ep_timeout(unsigned long arg)
|
|
{
|
|
struct iwch_ep *ep = (struct iwch_ep *)arg;
|
|
struct iwch_qp_attributes attrs;
|
|
unsigned long flags;
|
|
int abort = 1;
|
|
|
|
spin_lock_irqsave(&ep->com.lock, flags);
|
|
PDBG("%s ep %p tid %u state %d\n", __func__, ep, ep->hwtid,
|
|
ep->com.state);
|
|
switch (ep->com.state) {
|
|
case MPA_REQ_SENT:
|
|
__state_set(&ep->com, ABORTING);
|
|
connect_reply_upcall(ep, -ETIMEDOUT);
|
|
break;
|
|
case MPA_REQ_WAIT:
|
|
__state_set(&ep->com, ABORTING);
|
|
break;
|
|
case CLOSING:
|
|
case MORIBUND:
|
|
if (ep->com.cm_id && ep->com.qp) {
|
|
attrs.next_state = IWCH_QP_STATE_ERROR;
|
|
iwch_modify_qp(ep->com.qp->rhp,
|
|
ep->com.qp, IWCH_QP_ATTR_NEXT_STATE,
|
|
&attrs, 1);
|
|
}
|
|
__state_set(&ep->com, ABORTING);
|
|
break;
|
|
default:
|
|
printk(KERN_ERR "%s unexpected state ep %p state %u\n",
|
|
__func__, ep, ep->com.state);
|
|
WARN_ON(1);
|
|
abort = 0;
|
|
}
|
|
spin_unlock_irqrestore(&ep->com.lock, flags);
|
|
if (abort)
|
|
abort_connection(ep, NULL, GFP_ATOMIC);
|
|
put_ep(&ep->com);
|
|
}
|
|
|
|
int iwch_reject_cr(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
|
|
{
|
|
int err;
|
|
struct iwch_ep *ep = to_ep(cm_id);
|
|
PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
|
|
|
|
if (state_read(&ep->com) == DEAD) {
|
|
put_ep(&ep->com);
|
|
return -ECONNRESET;
|
|
}
|
|
BUG_ON(state_read(&ep->com) != MPA_REQ_RCVD);
|
|
if (mpa_rev == 0)
|
|
abort_connection(ep, NULL, GFP_KERNEL);
|
|
else {
|
|
err = send_mpa_reject(ep, pdata, pdata_len);
|
|
err = iwch_ep_disconnect(ep, 0, GFP_KERNEL);
|
|
}
|
|
put_ep(&ep->com);
|
|
return 0;
|
|
}
|
|
|
|
int iwch_accept_cr(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
|
|
{
|
|
int err;
|
|
struct iwch_qp_attributes attrs;
|
|
enum iwch_qp_attr_mask mask;
|
|
struct iwch_ep *ep = to_ep(cm_id);
|
|
struct iwch_dev *h = to_iwch_dev(cm_id->device);
|
|
struct iwch_qp *qp = get_qhp(h, conn_param->qpn);
|
|
|
|
PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
|
|
if (state_read(&ep->com) == DEAD) {
|
|
err = -ECONNRESET;
|
|
goto err;
|
|
}
|
|
|
|
BUG_ON(state_read(&ep->com) != MPA_REQ_RCVD);
|
|
BUG_ON(!qp);
|
|
|
|
if ((conn_param->ord > qp->rhp->attr.max_rdma_read_qp_depth) ||
|
|
(conn_param->ird > qp->rhp->attr.max_rdma_reads_per_qp)) {
|
|
abort_connection(ep, NULL, GFP_KERNEL);
|
|
err = -EINVAL;
|
|
goto err;
|
|
}
|
|
|
|
cm_id->add_ref(cm_id);
|
|
ep->com.cm_id = cm_id;
|
|
ep->com.qp = qp;
|
|
|
|
ep->ird = conn_param->ird;
|
|
ep->ord = conn_param->ord;
|
|
|
|
if (peer2peer && ep->ird == 0)
|
|
ep->ird = 1;
|
|
|
|
PDBG("%s %d ird %d ord %d\n", __func__, __LINE__, ep->ird, ep->ord);
|
|
|
|
/* bind QP to EP and move to RTS */
|
|
attrs.mpa_attr = ep->mpa_attr;
|
|
attrs.max_ird = ep->ird;
|
|
attrs.max_ord = ep->ord;
|
|
attrs.llp_stream_handle = ep;
|
|
attrs.next_state = IWCH_QP_STATE_RTS;
|
|
|
|
/* bind QP and TID with INIT_WR */
|
|
mask = IWCH_QP_ATTR_NEXT_STATE |
|
|
IWCH_QP_ATTR_LLP_STREAM_HANDLE |
|
|
IWCH_QP_ATTR_MPA_ATTR |
|
|
IWCH_QP_ATTR_MAX_IRD |
|
|
IWCH_QP_ATTR_MAX_ORD;
|
|
|
|
err = iwch_modify_qp(ep->com.qp->rhp,
|
|
ep->com.qp, mask, &attrs, 1);
|
|
if (err)
|
|
goto err1;
|
|
|
|
/* if needed, wait for wr_ack */
|
|
if (iwch_rqes_posted(qp)) {
|
|
wait_event(ep->com.waitq, ep->com.rpl_done);
|
|
err = ep->com.rpl_err;
|
|
if (err)
|
|
goto err1;
|
|
}
|
|
|
|
err = send_mpa_reply(ep, conn_param->private_data,
|
|
conn_param->private_data_len);
|
|
if (err)
|
|
goto err1;
|
|
|
|
|
|
state_set(&ep->com, FPDU_MODE);
|
|
established_upcall(ep);
|
|
put_ep(&ep->com);
|
|
return 0;
|
|
err1:
|
|
ep->com.cm_id = NULL;
|
|
ep->com.qp = NULL;
|
|
cm_id->rem_ref(cm_id);
|
|
err:
|
|
put_ep(&ep->com);
|
|
return err;
|
|
}
|
|
|
|
static int is_loopback_dst(struct iw_cm_id *cm_id)
|
|
{
|
|
struct net_device *dev;
|
|
|
|
dev = ip_dev_find(&init_net, cm_id->remote_addr.sin_addr.s_addr);
|
|
if (!dev)
|
|
return 0;
|
|
dev_put(dev);
|
|
return 1;
|
|
}
|
|
|
|
int iwch_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
|
|
{
|
|
int err = 0;
|
|
struct iwch_dev *h = to_iwch_dev(cm_id->device);
|
|
struct iwch_ep *ep;
|
|
struct rtable *rt;
|
|
|
|
if (is_loopback_dst(cm_id)) {
|
|
err = -ENOSYS;
|
|
goto out;
|
|
}
|
|
|
|
ep = alloc_ep(sizeof(*ep), GFP_KERNEL);
|
|
if (!ep) {
|
|
printk(KERN_ERR MOD "%s - cannot alloc ep.\n", __func__);
|
|
err = -ENOMEM;
|
|
goto out;
|
|
}
|
|
init_timer(&ep->timer);
|
|
ep->plen = conn_param->private_data_len;
|
|
if (ep->plen)
|
|
memcpy(ep->mpa_pkt + sizeof(struct mpa_message),
|
|
conn_param->private_data, ep->plen);
|
|
ep->ird = conn_param->ird;
|
|
ep->ord = conn_param->ord;
|
|
|
|
if (peer2peer && ep->ord == 0)
|
|
ep->ord = 1;
|
|
|
|
ep->com.tdev = h->rdev.t3cdev_p;
|
|
|
|
cm_id->add_ref(cm_id);
|
|
ep->com.cm_id = cm_id;
|
|
ep->com.qp = get_qhp(h, conn_param->qpn);
|
|
BUG_ON(!ep->com.qp);
|
|
PDBG("%s qpn 0x%x qp %p cm_id %p\n", __func__, conn_param->qpn,
|
|
ep->com.qp, cm_id);
|
|
|
|
/*
|
|
* Allocate an active TID to initiate a TCP connection.
|
|
*/
|
|
ep->atid = cxgb3_alloc_atid(h->rdev.t3cdev_p, &t3c_client, ep);
|
|
if (ep->atid == -1) {
|
|
printk(KERN_ERR MOD "%s - cannot alloc atid.\n", __func__);
|
|
err = -ENOMEM;
|
|
goto fail2;
|
|
}
|
|
|
|
/* find a route */
|
|
rt = find_route(h->rdev.t3cdev_p,
|
|
cm_id->local_addr.sin_addr.s_addr,
|
|
cm_id->remote_addr.sin_addr.s_addr,
|
|
cm_id->local_addr.sin_port,
|
|
cm_id->remote_addr.sin_port, IPTOS_LOWDELAY);
|
|
if (!rt) {
|
|
printk(KERN_ERR MOD "%s - cannot find route.\n", __func__);
|
|
err = -EHOSTUNREACH;
|
|
goto fail3;
|
|
}
|
|
ep->dst = &rt->dst;
|
|
|
|
/* get a l2t entry */
|
|
ep->l2t = t3_l2t_get(ep->com.tdev, ep->dst->neighbour,
|
|
ep->dst->neighbour->dev);
|
|
if (!ep->l2t) {
|
|
printk(KERN_ERR MOD "%s - cannot alloc l2e.\n", __func__);
|
|
err = -ENOMEM;
|
|
goto fail4;
|
|
}
|
|
|
|
state_set(&ep->com, CONNECTING);
|
|
ep->tos = IPTOS_LOWDELAY;
|
|
ep->com.local_addr = cm_id->local_addr;
|
|
ep->com.remote_addr = cm_id->remote_addr;
|
|
|
|
/* send connect request to rnic */
|
|
err = send_connect(ep);
|
|
if (!err)
|
|
goto out;
|
|
|
|
l2t_release(L2DATA(h->rdev.t3cdev_p), ep->l2t);
|
|
fail4:
|
|
dst_release(ep->dst);
|
|
fail3:
|
|
cxgb3_free_atid(ep->com.tdev, ep->atid);
|
|
fail2:
|
|
cm_id->rem_ref(cm_id);
|
|
put_ep(&ep->com);
|
|
out:
|
|
return err;
|
|
}
|
|
|
|
int iwch_create_listen(struct iw_cm_id *cm_id, int backlog)
|
|
{
|
|
int err = 0;
|
|
struct iwch_dev *h = to_iwch_dev(cm_id->device);
|
|
struct iwch_listen_ep *ep;
|
|
|
|
|
|
might_sleep();
|
|
|
|
ep = alloc_ep(sizeof(*ep), GFP_KERNEL);
|
|
if (!ep) {
|
|
printk(KERN_ERR MOD "%s - cannot alloc ep.\n", __func__);
|
|
err = -ENOMEM;
|
|
goto fail1;
|
|
}
|
|
PDBG("%s ep %p\n", __func__, ep);
|
|
ep->com.tdev = h->rdev.t3cdev_p;
|
|
cm_id->add_ref(cm_id);
|
|
ep->com.cm_id = cm_id;
|
|
ep->backlog = backlog;
|
|
ep->com.local_addr = cm_id->local_addr;
|
|
|
|
/*
|
|
* Allocate a server TID.
|
|
*/
|
|
ep->stid = cxgb3_alloc_stid(h->rdev.t3cdev_p, &t3c_client, ep);
|
|
if (ep->stid == -1) {
|
|
printk(KERN_ERR MOD "%s - cannot alloc atid.\n", __func__);
|
|
err = -ENOMEM;
|
|
goto fail2;
|
|
}
|
|
|
|
state_set(&ep->com, LISTEN);
|
|
err = listen_start(ep);
|
|
if (err)
|
|
goto fail3;
|
|
|
|
/* wait for pass_open_rpl */
|
|
wait_event(ep->com.waitq, ep->com.rpl_done);
|
|
err = ep->com.rpl_err;
|
|
if (!err) {
|
|
cm_id->provider_data = ep;
|
|
goto out;
|
|
}
|
|
fail3:
|
|
cxgb3_free_stid(ep->com.tdev, ep->stid);
|
|
fail2:
|
|
cm_id->rem_ref(cm_id);
|
|
put_ep(&ep->com);
|
|
fail1:
|
|
out:
|
|
return err;
|
|
}
|
|
|
|
int iwch_destroy_listen(struct iw_cm_id *cm_id)
|
|
{
|
|
int err;
|
|
struct iwch_listen_ep *ep = to_listen_ep(cm_id);
|
|
|
|
PDBG("%s ep %p\n", __func__, ep);
|
|
|
|
might_sleep();
|
|
state_set(&ep->com, DEAD);
|
|
ep->com.rpl_done = 0;
|
|
ep->com.rpl_err = 0;
|
|
err = listen_stop(ep);
|
|
if (err)
|
|
goto done;
|
|
wait_event(ep->com.waitq, ep->com.rpl_done);
|
|
cxgb3_free_stid(ep->com.tdev, ep->stid);
|
|
done:
|
|
err = ep->com.rpl_err;
|
|
cm_id->rem_ref(cm_id);
|
|
put_ep(&ep->com);
|
|
return err;
|
|
}
|
|
|
|
int iwch_ep_disconnect(struct iwch_ep *ep, int abrupt, gfp_t gfp)
|
|
{
|
|
int ret=0;
|
|
unsigned long flags;
|
|
int close = 0;
|
|
int fatal = 0;
|
|
struct t3cdev *tdev;
|
|
struct cxio_rdev *rdev;
|
|
|
|
spin_lock_irqsave(&ep->com.lock, flags);
|
|
|
|
PDBG("%s ep %p state %s, abrupt %d\n", __func__, ep,
|
|
states[ep->com.state], abrupt);
|
|
|
|
tdev = (struct t3cdev *)ep->com.tdev;
|
|
rdev = (struct cxio_rdev *)tdev->ulp;
|
|
if (cxio_fatal_error(rdev)) {
|
|
fatal = 1;
|
|
close_complete_upcall(ep);
|
|
ep->com.state = DEAD;
|
|
}
|
|
switch (ep->com.state) {
|
|
case MPA_REQ_WAIT:
|
|
case MPA_REQ_SENT:
|
|
case MPA_REQ_RCVD:
|
|
case MPA_REP_SENT:
|
|
case FPDU_MODE:
|
|
close = 1;
|
|
if (abrupt)
|
|
ep->com.state = ABORTING;
|
|
else {
|
|
ep->com.state = CLOSING;
|
|
start_ep_timer(ep);
|
|
}
|
|
set_bit(CLOSE_SENT, &ep->com.flags);
|
|
break;
|
|
case CLOSING:
|
|
if (!test_and_set_bit(CLOSE_SENT, &ep->com.flags)) {
|
|
close = 1;
|
|
if (abrupt) {
|
|
stop_ep_timer(ep);
|
|
ep->com.state = ABORTING;
|
|
} else
|
|
ep->com.state = MORIBUND;
|
|
}
|
|
break;
|
|
case MORIBUND:
|
|
case ABORTING:
|
|
case DEAD:
|
|
PDBG("%s ignoring disconnect ep %p state %u\n",
|
|
__func__, ep, ep->com.state);
|
|
break;
|
|
default:
|
|
BUG();
|
|
break;
|
|
}
|
|
|
|
spin_unlock_irqrestore(&ep->com.lock, flags);
|
|
if (close) {
|
|
if (abrupt)
|
|
ret = send_abort(ep, NULL, gfp);
|
|
else
|
|
ret = send_halfclose(ep, gfp);
|
|
if (ret)
|
|
fatal = 1;
|
|
}
|
|
if (fatal)
|
|
release_ep_resources(ep);
|
|
return ret;
|
|
}
|
|
|
|
int iwch_ep_redirect(void *ctx, struct dst_entry *old, struct dst_entry *new,
|
|
struct l2t_entry *l2t)
|
|
{
|
|
struct iwch_ep *ep = ctx;
|
|
|
|
if (ep->dst != old)
|
|
return 0;
|
|
|
|
PDBG("%s ep %p redirect to dst %p l2t %p\n", __func__, ep, new,
|
|
l2t);
|
|
dst_hold(new);
|
|
l2t_release(L2DATA(ep->com.tdev), ep->l2t);
|
|
ep->l2t = l2t;
|
|
dst_release(old);
|
|
ep->dst = new;
|
|
return 1;
|
|
}
|
|
|
|
/*
|
|
* All the CM events are handled on a work queue to have a safe context.
|
|
* These are the real handlers that are called from the work queue.
|
|
*/
|
|
static const cxgb3_cpl_handler_func work_handlers[NUM_CPL_CMDS] = {
|
|
[CPL_ACT_ESTABLISH] = act_establish,
|
|
[CPL_ACT_OPEN_RPL] = act_open_rpl,
|
|
[CPL_RX_DATA] = rx_data,
|
|
[CPL_TX_DMA_ACK] = tx_ack,
|
|
[CPL_ABORT_RPL_RSS] = abort_rpl,
|
|
[CPL_ABORT_RPL] = abort_rpl,
|
|
[CPL_PASS_OPEN_RPL] = pass_open_rpl,
|
|
[CPL_CLOSE_LISTSRV_RPL] = close_listsrv_rpl,
|
|
[CPL_PASS_ACCEPT_REQ] = pass_accept_req,
|
|
[CPL_PASS_ESTABLISH] = pass_establish,
|
|
[CPL_PEER_CLOSE] = peer_close,
|
|
[CPL_ABORT_REQ_RSS] = peer_abort,
|
|
[CPL_CLOSE_CON_RPL] = close_con_rpl,
|
|
[CPL_RDMA_TERMINATE] = terminate,
|
|
[CPL_RDMA_EC_STATUS] = ec_status,
|
|
};
|
|
|
|
static void process_work(struct work_struct *work)
|
|
{
|
|
struct sk_buff *skb = NULL;
|
|
void *ep;
|
|
struct t3cdev *tdev;
|
|
int ret;
|
|
|
|
while ((skb = skb_dequeue(&rxq))) {
|
|
ep = *((void **) (skb->cb));
|
|
tdev = *((struct t3cdev **) (skb->cb + sizeof(void *)));
|
|
ret = work_handlers[G_OPCODE(ntohl((__force __be32)skb->csum))](tdev, skb, ep);
|
|
if (ret & CPL_RET_BUF_DONE)
|
|
kfree_skb(skb);
|
|
|
|
/*
|
|
* ep was referenced in sched(), and is freed here.
|
|
*/
|
|
put_ep((struct iwch_ep_common *)ep);
|
|
}
|
|
}
|
|
|
|
static DECLARE_WORK(skb_work, process_work);
|
|
|
|
static int sched(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
|
|
{
|
|
struct iwch_ep_common *epc = ctx;
|
|
|
|
get_ep(epc);
|
|
|
|
/*
|
|
* Save ctx and tdev in the skb->cb area.
|
|
*/
|
|
*((void **) skb->cb) = ctx;
|
|
*((struct t3cdev **) (skb->cb + sizeof(void *))) = tdev;
|
|
|
|
/*
|
|
* Queue the skb and schedule the worker thread.
|
|
*/
|
|
skb_queue_tail(&rxq, skb);
|
|
queue_work(workq, &skb_work);
|
|
return 0;
|
|
}
|
|
|
|
static int set_tcb_rpl(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
|
|
{
|
|
struct cpl_set_tcb_rpl *rpl = cplhdr(skb);
|
|
|
|
if (rpl->status != CPL_ERR_NONE) {
|
|
printk(KERN_ERR MOD "Unexpected SET_TCB_RPL status %u "
|
|
"for tid %u\n", rpl->status, GET_TID(rpl));
|
|
}
|
|
return CPL_RET_BUF_DONE;
|
|
}
|
|
|
|
/*
|
|
* All upcalls from the T3 Core go to sched() to schedule the
|
|
* processing on a work queue.
|
|
*/
|
|
cxgb3_cpl_handler_func t3c_handlers[NUM_CPL_CMDS] = {
|
|
[CPL_ACT_ESTABLISH] = sched,
|
|
[CPL_ACT_OPEN_RPL] = sched,
|
|
[CPL_RX_DATA] = sched,
|
|
[CPL_TX_DMA_ACK] = sched,
|
|
[CPL_ABORT_RPL_RSS] = sched,
|
|
[CPL_ABORT_RPL] = sched,
|
|
[CPL_PASS_OPEN_RPL] = sched,
|
|
[CPL_CLOSE_LISTSRV_RPL] = sched,
|
|
[CPL_PASS_ACCEPT_REQ] = sched,
|
|
[CPL_PASS_ESTABLISH] = sched,
|
|
[CPL_PEER_CLOSE] = sched,
|
|
[CPL_CLOSE_CON_RPL] = sched,
|
|
[CPL_ABORT_REQ_RSS] = sched,
|
|
[CPL_RDMA_TERMINATE] = sched,
|
|
[CPL_RDMA_EC_STATUS] = sched,
|
|
[CPL_SET_TCB_RPL] = set_tcb_rpl,
|
|
};
|
|
|
|
int __init iwch_cm_init(void)
|
|
{
|
|
skb_queue_head_init(&rxq);
|
|
|
|
workq = create_singlethread_workqueue("iw_cxgb3");
|
|
if (!workq)
|
|
return -ENOMEM;
|
|
|
|
return 0;
|
|
}
|
|
|
|
void __exit iwch_cm_term(void)
|
|
{
|
|
flush_workqueue(workq);
|
|
destroy_workqueue(workq);
|
|
}
|