linux/drivers/infiniband/hw/cxgb3/iwch_cm.h
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   1/*
   2 * Copyright (c) 2006 Chelsio, Inc. All rights reserved.
   3 *
   4 * This software is available to you under a choice of one of two
   5 * licenses.  You may choose to be licensed under the terms of the GNU
   6 * General Public License (GPL) Version 2, available from the file
   7 * COPYING in the main directory of this source tree, or the
   8 * OpenIB.org BSD license below:
   9 *
  10 *     Redistribution and use in source and binary forms, with or
  11 *     without modification, are permitted provided that the following
  12 *     conditions are met:
  13 *
  14 *      - Redistributions of source code must retain the above
  15 *        copyright notice, this list of conditions and the following
  16 *        disclaimer.
  17 *
  18 *      - Redistributions in binary form must reproduce the above
  19 *        copyright notice, this list of conditions and the following
  20 *        disclaimer in the documentation and/or other materials
  21 *        provided with the distribution.
  22 *
  23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  30 * SOFTWARE.
  31 */
  32#ifndef _IWCH_CM_H_
  33#define _IWCH_CM_H_
  34
  35#include <linux/inet.h>
  36#include <linux/wait.h>
  37#include <linux/spinlock.h>
  38#include <linux/kref.h>
  39
  40#include <rdma/ib_verbs.h>
  41#include <rdma/iw_cm.h>
  42
  43#include "cxgb3_offload.h"
  44#include "iwch_provider.h"
  45
  46#define MPA_KEY_REQ "MPA ID Req Frame"
  47#define MPA_KEY_REP "MPA ID Rep Frame"
  48
  49#define MPA_MAX_PRIVATE_DATA    256
  50#define MPA_REV         0       /* XXX - amso1100 uses rev 0 ! */
  51#define MPA_REJECT              0x20
  52#define MPA_CRC                 0x40
  53#define MPA_MARKERS             0x80
  54#define MPA_FLAGS_MASK          0xE0
  55
  56#define put_ep(ep) { \
  57        PDBG("put_ep (via %s:%u) ep %p refcnt %d\n", __func__, __LINE__,  \
  58             ep, atomic_read(&((ep)->kref.refcount))); \
  59        WARN_ON(atomic_read(&((ep)->kref.refcount)) < 1); \
  60        kref_put(&((ep)->kref), __free_ep); \
  61}
  62
  63#define get_ep(ep) { \
  64        PDBG("get_ep (via %s:%u) ep %p, refcnt %d\n", __func__, __LINE__, \
  65             ep, atomic_read(&((ep)->kref.refcount))); \
  66        kref_get(&((ep)->kref));  \
  67}
  68
  69struct mpa_message {
  70        u8 key[16];
  71        u8 flags;
  72        u8 revision;
  73        __be16 private_data_size;
  74        u8 private_data[0];
  75};
  76
  77struct terminate_message {
  78        u8 layer_etype;
  79        u8 ecode;
  80        __be16 hdrct_rsvd;
  81        u8 len_hdrs[0];
  82};
  83
  84#define TERM_MAX_LENGTH (sizeof(struct terminate_message) + 2 + 18 + 28)
  85
  86enum iwch_layers_types {
  87        LAYER_RDMAP             = 0x00,
  88        LAYER_DDP               = 0x10,
  89        LAYER_MPA               = 0x20,
  90        RDMAP_LOCAL_CATA        = 0x00,
  91        RDMAP_REMOTE_PROT       = 0x01,
  92        RDMAP_REMOTE_OP         = 0x02,
  93        DDP_LOCAL_CATA          = 0x00,
  94        DDP_TAGGED_ERR          = 0x01,
  95        DDP_UNTAGGED_ERR        = 0x02,
  96        DDP_LLP                 = 0x03
  97};
  98
  99enum iwch_rdma_ecodes {
 100        RDMAP_INV_STAG          = 0x00,
 101        RDMAP_BASE_BOUNDS       = 0x01,
 102        RDMAP_ACC_VIOL          = 0x02,
 103        RDMAP_STAG_NOT_ASSOC    = 0x03,
 104        RDMAP_TO_WRAP           = 0x04,
 105        RDMAP_INV_VERS          = 0x05,
 106        RDMAP_INV_OPCODE        = 0x06,
 107        RDMAP_STREAM_CATA       = 0x07,
 108        RDMAP_GLOBAL_CATA       = 0x08,
 109        RDMAP_CANT_INV_STAG     = 0x09,
 110        RDMAP_UNSPECIFIED       = 0xff
 111};
 112
 113enum iwch_ddp_ecodes {
 114        DDPT_INV_STAG           = 0x00,
 115        DDPT_BASE_BOUNDS        = 0x01,
 116        DDPT_STAG_NOT_ASSOC     = 0x02,
 117        DDPT_TO_WRAP            = 0x03,
 118        DDPT_INV_VERS           = 0x04,
 119        DDPU_INV_QN             = 0x01,
 120        DDPU_INV_MSN_NOBUF      = 0x02,
 121        DDPU_INV_MSN_RANGE      = 0x03,
 122        DDPU_INV_MO             = 0x04,
 123        DDPU_MSG_TOOBIG         = 0x05,
 124        DDPU_INV_VERS           = 0x06
 125};
 126
 127enum iwch_mpa_ecodes {
 128        MPA_CRC_ERR             = 0x02,
 129        MPA_MARKER_ERR          = 0x03
 130};
 131
 132enum iwch_ep_state {
 133        IDLE = 0,
 134        LISTEN,
 135        CONNECTING,
 136        MPA_REQ_WAIT,
 137        MPA_REQ_SENT,
 138        MPA_REQ_RCVD,
 139        MPA_REP_SENT,
 140        FPDU_MODE,
 141        ABORTING,
 142        CLOSING,
 143        MORIBUND,
 144        DEAD,
 145};
 146
 147enum iwch_ep_flags {
 148        PEER_ABORT_IN_PROGRESS  = 0,
 149        ABORT_REQ_IN_PROGRESS   = 1,
 150        RELEASE_RESOURCES       = 2,
 151        CLOSE_SENT              = 3,
 152};
 153
 154struct iwch_ep_common {
 155        struct iw_cm_id *cm_id;
 156        struct iwch_qp *qp;
 157        struct t3cdev *tdev;
 158        enum iwch_ep_state state;
 159        struct kref kref;
 160        spinlock_t lock;
 161        struct sockaddr_in local_addr;
 162        struct sockaddr_in remote_addr;
 163        wait_queue_head_t waitq;
 164        int rpl_done;
 165        int rpl_err;
 166        unsigned long flags;
 167};
 168
 169struct iwch_listen_ep {
 170        struct iwch_ep_common com;
 171        unsigned int stid;
 172        int backlog;
 173};
 174
 175struct iwch_ep {
 176        struct iwch_ep_common com;
 177        struct iwch_ep *parent_ep;
 178        struct timer_list timer;
 179        unsigned int atid;
 180        u32 hwtid;
 181        u32 snd_seq;
 182        u32 rcv_seq;
 183        struct l2t_entry *l2t;
 184        struct dst_entry *dst;
 185        struct sk_buff *mpa_skb;
 186        struct iwch_mpa_attributes mpa_attr;
 187        unsigned int mpa_pkt_len;
 188        u8 mpa_pkt[sizeof(struct mpa_message) + MPA_MAX_PRIVATE_DATA];
 189        u8 tos;
 190        u16 emss;
 191        u16 plen;
 192        u32 ird;
 193        u32 ord;
 194};
 195
 196static inline struct iwch_ep *to_ep(struct iw_cm_id *cm_id)
 197{
 198        return cm_id->provider_data;
 199}
 200
 201static inline struct iwch_listen_ep *to_listen_ep(struct iw_cm_id *cm_id)
 202{
 203        return cm_id->provider_data;
 204}
 205
 206static inline int compute_wscale(int win)
 207{
 208        int wscale = 0;
 209
 210        while (wscale < 14 && (65535<<wscale) < win)
 211                wscale++;
 212        return wscale;
 213}
 214
 215/* CM prototypes */
 216
 217int iwch_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param);
 218int iwch_create_listen(struct iw_cm_id *cm_id, int backlog);
 219int iwch_destroy_listen(struct iw_cm_id *cm_id);
 220int iwch_reject_cr(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len);
 221int iwch_accept_cr(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param);
 222int iwch_ep_disconnect(struct iwch_ep *ep, int abrupt, gfp_t gfp);
 223int iwch_quiesce_tid(struct iwch_ep *ep);
 224int iwch_resume_tid(struct iwch_ep *ep);
 225void __free_ep(struct kref *kref);
 226void iwch_rearp(struct iwch_ep *ep);
 227int iwch_ep_redirect(void *ctx, struct dst_entry *old, struct dst_entry *new, struct l2t_entry *l2t);
 228
 229int __init iwch_cm_init(void);
 230void __exit iwch_cm_term(void);
 231extern int peer2peer;
 232
 233#endif                          /* _IWCH_CM_H_ */
 234