234 строки
5.7 KiB
C
234 строки
5.7 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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#ifndef _IWCH_CM_H_
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#define _IWCH_CM_H_
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#include <linux/inet.h>
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#include <linux/wait.h>
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#include <linux/spinlock.h>
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#include <linux/kref.h>
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#include <rdma/ib_verbs.h>
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#include <rdma/iw_cm.h>
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#include "cxgb3_offload.h"
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#include "iwch_provider.h"
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#define MPA_KEY_REQ "MPA ID Req Frame"
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#define MPA_KEY_REP "MPA ID Rep Frame"
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#define MPA_MAX_PRIVATE_DATA 256
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#define MPA_REV 0 /* XXX - amso1100 uses rev 0 ! */
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#define MPA_REJECT 0x20
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#define MPA_CRC 0x40
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#define MPA_MARKERS 0x80
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#define MPA_FLAGS_MASK 0xE0
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#define put_ep(ep) { \
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PDBG("put_ep (via %s:%u) ep %p refcnt %d\n", __func__, __LINE__, \
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ep, atomic_read(&((ep)->kref.refcount))); \
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WARN_ON(atomic_read(&((ep)->kref.refcount)) < 1); \
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kref_put(&((ep)->kref), __free_ep); \
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}
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#define get_ep(ep) { \
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PDBG("get_ep (via %s:%u) ep %p, refcnt %d\n", __func__, __LINE__, \
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ep, atomic_read(&((ep)->kref.refcount))); \
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kref_get(&((ep)->kref)); \
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}
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struct mpa_message {
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u8 key[16];
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u8 flags;
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u8 revision;
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__be16 private_data_size;
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u8 private_data[0];
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};
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struct terminate_message {
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u8 layer_etype;
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u8 ecode;
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__be16 hdrct_rsvd;
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u8 len_hdrs[0];
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};
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#define TERM_MAX_LENGTH (sizeof(struct terminate_message) + 2 + 18 + 28)
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enum iwch_layers_types {
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LAYER_RDMAP = 0x00,
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LAYER_DDP = 0x10,
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LAYER_MPA = 0x20,
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RDMAP_LOCAL_CATA = 0x00,
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RDMAP_REMOTE_PROT = 0x01,
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RDMAP_REMOTE_OP = 0x02,
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DDP_LOCAL_CATA = 0x00,
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DDP_TAGGED_ERR = 0x01,
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DDP_UNTAGGED_ERR = 0x02,
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DDP_LLP = 0x03
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};
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enum iwch_rdma_ecodes {
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RDMAP_INV_STAG = 0x00,
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RDMAP_BASE_BOUNDS = 0x01,
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RDMAP_ACC_VIOL = 0x02,
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RDMAP_STAG_NOT_ASSOC = 0x03,
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RDMAP_TO_WRAP = 0x04,
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RDMAP_INV_VERS = 0x05,
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RDMAP_INV_OPCODE = 0x06,
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RDMAP_STREAM_CATA = 0x07,
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RDMAP_GLOBAL_CATA = 0x08,
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RDMAP_CANT_INV_STAG = 0x09,
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RDMAP_UNSPECIFIED = 0xff
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};
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enum iwch_ddp_ecodes {
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DDPT_INV_STAG = 0x00,
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DDPT_BASE_BOUNDS = 0x01,
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DDPT_STAG_NOT_ASSOC = 0x02,
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DDPT_TO_WRAP = 0x03,
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DDPT_INV_VERS = 0x04,
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DDPU_INV_QN = 0x01,
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DDPU_INV_MSN_NOBUF = 0x02,
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DDPU_INV_MSN_RANGE = 0x03,
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DDPU_INV_MO = 0x04,
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DDPU_MSG_TOOBIG = 0x05,
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DDPU_INV_VERS = 0x06
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};
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enum iwch_mpa_ecodes {
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MPA_CRC_ERR = 0x02,
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MPA_MARKER_ERR = 0x03
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};
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enum iwch_ep_state {
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IDLE = 0,
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LISTEN,
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CONNECTING,
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MPA_REQ_WAIT,
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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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};
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enum iwch_ep_flags {
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PEER_ABORT_IN_PROGRESS = 0,
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ABORT_REQ_IN_PROGRESS = 1,
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RELEASE_RESOURCES = 2,
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CLOSE_SENT = 3,
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};
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struct iwch_ep_common {
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struct iw_cm_id *cm_id;
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struct iwch_qp *qp;
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struct t3cdev *tdev;
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enum iwch_ep_state state;
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struct kref kref;
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spinlock_t lock;
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struct sockaddr_in local_addr;
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struct sockaddr_in remote_addr;
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wait_queue_head_t waitq;
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int rpl_done;
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int rpl_err;
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unsigned long flags;
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};
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struct iwch_listen_ep {
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struct iwch_ep_common com;
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unsigned int stid;
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int backlog;
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};
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struct iwch_ep {
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struct iwch_ep_common com;
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struct iwch_ep *parent_ep;
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struct timer_list timer;
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unsigned int atid;
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u32 hwtid;
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u32 snd_seq;
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u32 rcv_seq;
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struct l2t_entry *l2t;
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struct dst_entry *dst;
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struct sk_buff *mpa_skb;
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struct iwch_mpa_attributes mpa_attr;
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unsigned int mpa_pkt_len;
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u8 mpa_pkt[sizeof(struct mpa_message) + MPA_MAX_PRIVATE_DATA];
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u8 tos;
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u16 emss;
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u16 plen;
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u32 ird;
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u32 ord;
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};
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static inline struct iwch_ep *to_ep(struct iw_cm_id *cm_id)
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{
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return cm_id->provider_data;
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}
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static inline struct iwch_listen_ep *to_listen_ep(struct iw_cm_id *cm_id)
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{
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return cm_id->provider_data;
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}
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static inline int compute_wscale(int win)
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{
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int wscale = 0;
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while (wscale < 14 && (65535<<wscale) < win)
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wscale++;
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return wscale;
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}
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/* CM prototypes */
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int iwch_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param);
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int iwch_create_listen(struct iw_cm_id *cm_id, int backlog);
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int iwch_destroy_listen(struct iw_cm_id *cm_id);
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int iwch_reject_cr(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len);
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int iwch_accept_cr(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param);
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int iwch_ep_disconnect(struct iwch_ep *ep, int abrupt, gfp_t gfp);
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int iwch_quiesce_tid(struct iwch_ep *ep);
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int iwch_resume_tid(struct iwch_ep *ep);
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void __free_ep(struct kref *kref);
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void iwch_rearp(struct iwch_ep *ep);
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int iwch_ep_redirect(void *ctx, struct dst_entry *old, struct dst_entry *new, struct l2t_entry *l2t);
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int __init iwch_cm_init(void);
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void __exit iwch_cm_term(void);
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extern int peer2peer;
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#endif /* _IWCH_CM_H_ */
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