drivers/infiniband/hw/cxgb3/iwch_cm.h

   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
  69 struct mpa_message {
  70         u8 key[16];
  71         u8 flags;
  72         u8 revision;
  73         __be16 private_data_size;
  74         u8 private_data[0];
  75 };
  76
  77 struct 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
  86 enum 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
  99 enum 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
 113 enum 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
 127 enum iwch_mpa_ecodes {
 128         MPA_CRC_ERR             = 0x02,
 129         MPA_MARKER_ERR          = 0x03
 130 };
 131
 132 enum 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
 147 enum iwch_ep_flags {
 148         PEER_ABORT_IN_PROGRESS  = (1 << 0),
 149         ABORT_REQ_IN_PROGRESS   = (1 << 1),
 150         RELEASE_RESOURCES       = (1 << 2),
 151 };
 152
 153 struct iwch_ep_common {
 154         struct iw_cm_id *cm_id;
 155         struct iwch_qp *qp;
 156         struct t3cdev *tdev;
 157         enum iwch_ep_state state;
 158         struct kref kref;
 159         spinlock_t lock;
 160         struct sockaddr_in local_addr;
 161         struct sockaddr_in remote_addr;
 162         wait_queue_head_t waitq;
 163         int rpl_done;
 164         int rpl_err;
 165         u32 flags;
 166 };
 167
 168 struct iwch_listen_ep {
 169         struct iwch_ep_common com;
 170         unsigned int stid;
 171         int backlog;
 172 };
 173
 174 struct iwch_ep {
 175         struct iwch_ep_common com;
 176         struct iwch_ep *parent_ep;
 177         struct timer_list timer;
 178         unsigned int atid;
 179         u32 hwtid;
 180         u32 snd_seq;
 181         u32 rcv_seq;
 182         struct l2t_entry *l2t;
 183         struct dst_entry *dst;
 184         struct sk_buff *mpa_skb;
 185         struct iwch_mpa_attributes mpa_attr;
 186         unsigned int mpa_pkt_len;
 187         u8 mpa_pkt[sizeof(struct mpa_message) + MPA_MAX_PRIVATE_DATA];
 188         u8 tos;
 189         u16 emss;
 190         u16 plen;
 191         u32 ird;
 192         u32 ord;
 193 };
 194
 195 static inline struct iwch_ep *to_ep(struct iw_cm_id *cm_id)
 196 {
 197         return cm_id->provider_data;
 198 }
 199
 200 static inline struct iwch_listen_ep *to_listen_ep(struct iw_cm_id *cm_id)
 201 {
 202         return cm_id->provider_data;
 203 }
 204
 205 static inline int compute_wscale(int win)
 206 {
 207         int wscale = 0;
 208
 209         while (wscale < 14 && (65535<<wscale) < win)
 210                 wscale++;
 211         return wscale;
 212 }
 213
 214 /* CM prototypes */
 215
 216 int iwch_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param);
 217 int iwch_create_listen(struct iw_cm_id *cm_id, int backlog);
 218 int iwch_destroy_listen(struct iw_cm_id *cm_id);
 219 int iwch_reject_cr(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len);
 220 int iwch_accept_cr(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param);
 221 int iwch_ep_disconnect(struct iwch_ep *ep, int abrupt, gfp_t gfp);
 222 int iwch_quiesce_tid(struct iwch_ep *ep);
 223 int iwch_resume_tid(struct iwch_ep *ep);
 224 void __free_ep(struct kref *kref);
 225 void iwch_rearp(struct iwch_ep *ep);
 226 int iwch_ep_redirect(void *ctx, struct dst_entry *old, struct dst_entry *new, struct l2t_entry *l2t);
 227
 228 int __init iwch_cm_init(void);
 229 void __exit iwch_cm_term(void);
 230 extern int peer2peer;
 231
 232 #endif                          /* _IWCH_CM_H_ */