471 lines
12 KiB
C
Executable file
471 lines
12 KiB
C
Executable file
/*
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* Copyright (c) 2006 - 2014 Intel Corporation. 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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*/
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#ifndef NES_CM_H
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#define NES_CM_H
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#define QUEUE_EVENTS
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#define NES_MANAGE_APBVT_DEL 0
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#define NES_MANAGE_APBVT_ADD 1
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#define NES_MPA_REQUEST_ACCEPT 1
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#define NES_MPA_REQUEST_REJECT 2
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/* IETF MPA -- defines, enums, structs */
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#define IEFT_MPA_KEY_REQ "MPA ID Req Frame"
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#define IEFT_MPA_KEY_REP "MPA ID Rep Frame"
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#define IETF_MPA_KEY_SIZE 16
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#define IETF_MPA_VERSION 1
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#define IETF_MAX_PRIV_DATA_LEN 512
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#define IETF_MPA_FRAME_SIZE 20
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#define IETF_RTR_MSG_SIZE 4
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#define IETF_MPA_V2_FLAG 0x10
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/* IETF RTR MSG Fields */
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#define IETF_PEER_TO_PEER 0x8000
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#define IETF_FLPDU_ZERO_LEN 0x4000
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#define IETF_RDMA0_WRITE 0x8000
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#define IETF_RDMA0_READ 0x4000
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#define IETF_NO_IRD_ORD 0x3FFF
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#define NES_MAX_IRD 0x40
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#define NES_MAX_ORD 0x7F
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enum ietf_mpa_flags {
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IETF_MPA_FLAGS_MARKERS = 0x80, /* receive Markers */
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IETF_MPA_FLAGS_CRC = 0x40, /* receive Markers */
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IETF_MPA_FLAGS_REJECT = 0x20, /* Reject */
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};
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struct ietf_mpa_v1 {
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u8 key[IETF_MPA_KEY_SIZE];
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u8 flags;
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u8 rev;
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__be16 priv_data_len;
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u8 priv_data[0];
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};
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#define ietf_mpa_req_resp_frame ietf_mpa_frame
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struct ietf_rtr_msg {
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__be16 ctrl_ird;
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__be16 ctrl_ord;
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};
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struct ietf_mpa_v2 {
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u8 key[IETF_MPA_KEY_SIZE];
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u8 flags;
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u8 rev;
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__be16 priv_data_len;
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struct ietf_rtr_msg rtr_msg;
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u8 priv_data[0];
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};
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struct nes_v4_quad {
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u32 rsvd0;
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__le32 DstIpAdrIndex; /* Only most significant 5 bits are valid */
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__be32 SrcIpadr;
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__be16 TcpPorts[2]; /* src is low, dest is high */
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};
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struct nes_cm_node;
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enum nes_timer_type {
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NES_TIMER_TYPE_SEND,
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NES_TIMER_TYPE_RECV,
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NES_TIMER_NODE_CLEANUP,
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NES_TIMER_TYPE_CLOSE,
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};
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#define NES_PASSIVE_STATE_INDICATED 0
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#define NES_DO_NOT_SEND_RESET_EVENT 1
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#define NES_SEND_RESET_EVENT 2
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#define MAX_NES_IFS 4
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#define SET_ACK 1
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#define SET_SYN 2
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#define SET_FIN 4
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#define SET_RST 8
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#define TCP_OPTIONS_PADDING 3
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struct option_base {
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u8 optionnum;
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u8 length;
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};
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enum option_numbers {
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OPTION_NUMBER_END,
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OPTION_NUMBER_NONE,
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OPTION_NUMBER_MSS,
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OPTION_NUMBER_WINDOW_SCALE,
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OPTION_NUMBER_SACK_PERM,
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OPTION_NUMBER_SACK,
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OPTION_NUMBER_WRITE0 = 0xbc
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};
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struct option_mss {
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u8 optionnum;
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u8 length;
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__be16 mss;
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};
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struct option_windowscale {
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u8 optionnum;
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u8 length;
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u8 shiftcount;
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};
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union all_known_options {
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char as_end;
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struct option_base as_base;
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struct option_mss as_mss;
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struct option_windowscale as_windowscale;
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};
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struct nes_timer_entry {
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struct list_head list;
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unsigned long timetosend; /* jiffies */
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struct sk_buff *skb;
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u32 type;
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u32 retrycount;
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u32 retranscount;
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u32 context;
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u32 seq_num;
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u32 send_retrans;
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int close_when_complete;
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struct net_device *netdev;
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};
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#define NES_DEFAULT_RETRYS 64
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#define NES_DEFAULT_RETRANS 8
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#ifdef CONFIG_INFINIBAND_NES_DEBUG
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#define NES_RETRY_TIMEOUT (1000*HZ/1000)
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#else
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#define NES_RETRY_TIMEOUT (3000*HZ/1000)
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#endif
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#define NES_SHORT_TIME (10)
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#define NES_LONG_TIME (2000*HZ/1000)
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#define NES_MAX_TIMEOUT ((unsigned long) (12*HZ))
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#define NES_CM_HASHTABLE_SIZE 1024
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#define NES_CM_TCP_TIMER_INTERVAL 3000
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#define NES_CM_DEFAULT_MTU 1540
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#define NES_CM_DEFAULT_FRAME_CNT 10
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#define NES_CM_THREAD_STACK_SIZE 256
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#define NES_CM_DEFAULT_RCV_WND 64240 // before we know that window scaling is allowed
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#define NES_CM_DEFAULT_RCV_WND_SCALED 256960 // after we know that window scaling is allowed
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#define NES_CM_DEFAULT_RCV_WND_SCALE 2
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#define NES_CM_DEFAULT_FREE_PKTS 0x000A
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#define NES_CM_FREE_PKT_LO_WATERMARK 2
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#define NES_CM_DEFAULT_MSS 536
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#define NES_CM_DEF_SEQ 0x159bf75f
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#define NES_CM_DEF_LOCAL_ID 0x3b47
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#define NES_CM_DEF_SEQ2 0x18ed5740
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#define NES_CM_DEF_LOCAL_ID2 0xb807
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#define MAX_CM_BUFFER (IETF_MPA_FRAME_SIZE + IETF_RTR_MSG_SIZE + IETF_MAX_PRIV_DATA_LEN)
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typedef u32 nes_addr_t;
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#define nes_cm_tsa_context nes_qp_context
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struct nes_qp;
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/* cm node transition states */
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enum nes_cm_node_state {
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NES_CM_STATE_UNKNOWN,
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NES_CM_STATE_INITED,
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NES_CM_STATE_LISTENING,
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NES_CM_STATE_SYN_RCVD,
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NES_CM_STATE_SYN_SENT,
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NES_CM_STATE_ONE_SIDE_ESTABLISHED,
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NES_CM_STATE_ESTABLISHED,
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NES_CM_STATE_ACCEPTING,
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NES_CM_STATE_MPAREQ_SENT,
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NES_CM_STATE_MPAREQ_RCVD,
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NES_CM_STATE_MPAREJ_RCVD,
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NES_CM_STATE_TSA,
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NES_CM_STATE_FIN_WAIT1,
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NES_CM_STATE_FIN_WAIT2,
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NES_CM_STATE_CLOSE_WAIT,
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NES_CM_STATE_TIME_WAIT,
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NES_CM_STATE_LAST_ACK,
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NES_CM_STATE_CLOSING,
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NES_CM_STATE_LISTENER_DESTROYED,
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NES_CM_STATE_CLOSED
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};
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enum mpa_frame_version {
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IETF_MPA_V1 = 1,
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IETF_MPA_V2 = 2
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};
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enum mpa_frame_key {
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MPA_KEY_REQUEST,
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MPA_KEY_REPLY
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};
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enum send_rdma0 {
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SEND_RDMA_READ_ZERO = 1,
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SEND_RDMA_WRITE_ZERO = 2
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};
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enum nes_tcpip_pkt_type {
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NES_PKT_TYPE_UNKNOWN,
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NES_PKT_TYPE_SYN,
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NES_PKT_TYPE_SYNACK,
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NES_PKT_TYPE_ACK,
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NES_PKT_TYPE_FIN,
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NES_PKT_TYPE_RST
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};
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/* type of nes connection */
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enum nes_cm_conn_type {
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NES_CM_IWARP_CONN_TYPE,
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};
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/* CM context params */
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struct nes_cm_tcp_context {
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u8 client;
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u32 loc_seq_num;
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u32 loc_ack_num;
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u32 rem_ack_num;
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u32 rcv_nxt;
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u32 loc_id;
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u32 rem_id;
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u32 snd_wnd;
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u32 max_snd_wnd;
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u32 rcv_wnd;
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u32 mss;
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u8 snd_wscale;
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u8 rcv_wscale;
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struct nes_cm_tsa_context tsa_cntxt;
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};
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enum nes_cm_listener_state {
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NES_CM_LISTENER_PASSIVE_STATE = 1,
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NES_CM_LISTENER_ACTIVE_STATE = 2,
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NES_CM_LISTENER_EITHER_STATE = 3
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};
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struct nes_cm_listener {
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struct list_head list;
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struct nes_cm_core *cm_core;
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u8 loc_mac[ETH_ALEN];
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nes_addr_t loc_addr;
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u16 loc_port;
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struct iw_cm_id *cm_id;
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enum nes_cm_conn_type conn_type;
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atomic_t ref_count;
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struct nes_vnic *nesvnic;
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atomic_t pend_accepts_cnt;
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int backlog;
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enum nes_cm_listener_state listener_state;
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u32 reused_node;
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u8 tos;
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};
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/* per connection node and node state information */
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struct nes_cm_node {
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nes_addr_t loc_addr, rem_addr;
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u16 loc_port, rem_port;
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u8 loc_mac[ETH_ALEN];
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u8 rem_mac[ETH_ALEN];
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enum nes_cm_node_state state;
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struct nes_cm_tcp_context tcp_cntxt;
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struct nes_cm_core *cm_core;
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struct sk_buff_head resend_list;
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atomic_t ref_count;
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struct net_device *netdev;
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struct nes_cm_node *loopbackpartner;
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struct nes_timer_entry *send_entry;
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struct nes_timer_entry *recv_entry;
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spinlock_t retrans_list_lock;
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enum send_rdma0 send_rdma0_op;
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union {
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struct ietf_mpa_v1 mpa_frame;
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struct ietf_mpa_v2 mpa_v2_frame;
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u8 mpa_frame_buf[MAX_CM_BUFFER];
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};
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enum mpa_frame_version mpa_frame_rev;
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u16 ird_size;
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u16 ord_size;
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u16 mpav2_ird_ord;
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u16 mpa_frame_size;
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struct iw_cm_id *cm_id;
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struct list_head list;
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bool accelerated;
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struct nes_cm_listener *listener;
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enum nes_cm_conn_type conn_type;
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struct nes_vnic *nesvnic;
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int apbvt_set;
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int accept_pend;
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struct list_head timer_entry;
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struct list_head reset_entry;
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struct nes_qp *nesqp;
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atomic_t passive_state;
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u8 tos;
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};
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/* structure for client or CM to fill when making CM api calls. */
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/* - only need to set relevant data, based on op. */
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struct nes_cm_info {
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union {
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struct iw_cm_id *cm_id;
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struct net_device *netdev;
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};
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u16 loc_port;
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u16 rem_port;
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nes_addr_t loc_addr;
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nes_addr_t rem_addr;
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enum nes_cm_conn_type conn_type;
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int backlog;
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};
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/* CM event codes */
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enum nes_cm_event_type {
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NES_CM_EVENT_UNKNOWN,
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NES_CM_EVENT_ESTABLISHED,
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NES_CM_EVENT_MPA_REQ,
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NES_CM_EVENT_MPA_CONNECT,
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NES_CM_EVENT_MPA_ACCEPT,
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NES_CM_EVENT_MPA_REJECT,
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NES_CM_EVENT_MPA_ESTABLISHED,
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NES_CM_EVENT_CONNECTED,
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NES_CM_EVENT_CLOSED,
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NES_CM_EVENT_RESET,
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NES_CM_EVENT_DROPPED_PKT,
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NES_CM_EVENT_CLOSE_IMMED,
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NES_CM_EVENT_CLOSE_HARD,
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NES_CM_EVENT_CLOSE_CLEAN,
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NES_CM_EVENT_ABORTED,
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NES_CM_EVENT_SEND_FIRST
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};
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/* event to post to CM event handler */
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struct nes_cm_event {
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enum nes_cm_event_type type;
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struct nes_cm_info cm_info;
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struct work_struct event_work;
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struct nes_cm_node *cm_node;
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};
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struct nes_cm_core {
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enum nes_cm_node_state state;
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atomic_t listen_node_cnt;
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struct nes_cm_node listen_list;
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spinlock_t listen_list_lock;
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u32 mtu;
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u32 free_tx_pkt_max;
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u32 rx_pkt_posted;
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atomic_t ht_node_cnt;
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struct list_head connected_nodes;
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/* struct list_head hashtable[NES_CM_HASHTABLE_SIZE]; */
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spinlock_t ht_lock;
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struct timer_list tcp_timer;
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const struct nes_cm_ops *api;
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int (*post_event)(struct nes_cm_event *event);
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atomic_t events_posted;
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struct workqueue_struct *event_wq;
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struct workqueue_struct *disconn_wq;
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atomic_t node_cnt;
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u64 aborted_connects;
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u32 options;
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struct nes_cm_node *current_listen_node;
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};
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#define NES_CM_SET_PKT_SIZE (1 << 1)
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#define NES_CM_SET_FREE_PKT_Q_SIZE (1 << 2)
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/* CM ops/API for client interface */
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struct nes_cm_ops {
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int (*accelerated)(struct nes_cm_core *, struct nes_cm_node *);
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struct nes_cm_listener * (*listen)(struct nes_cm_core *, struct nes_vnic *,
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struct nes_cm_info *);
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int (*stop_listener)(struct nes_cm_core *, struct nes_cm_listener *);
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struct nes_cm_node * (*connect)(struct nes_cm_core *,
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struct nes_vnic *, u16, void *,
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struct nes_cm_info *);
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int (*close)(struct nes_cm_core *, struct nes_cm_node *);
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int (*accept)(struct nes_cm_core *, struct nes_cm_node *);
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int (*reject)(struct nes_cm_core *, struct nes_cm_node *);
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int (*recv_pkt)(struct nes_cm_core *, struct nes_vnic *,
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struct sk_buff *);
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int (*destroy_cm_core)(struct nes_cm_core *);
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int (*get)(struct nes_cm_core *);
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int (*set)(struct nes_cm_core *, u32, u32);
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};
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int schedule_nes_timer(struct nes_cm_node *, struct sk_buff *,
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enum nes_timer_type, int, int);
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int nes_accept(struct iw_cm_id *, struct iw_cm_conn_param *);
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int nes_reject(struct iw_cm_id *, const void *, u8);
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int nes_connect(struct iw_cm_id *, struct iw_cm_conn_param *);
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int nes_create_listen(struct iw_cm_id *, int);
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int nes_destroy_listen(struct iw_cm_id *);
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int nes_cm_recv(struct sk_buff *, struct net_device *);
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int nes_cm_start(void);
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int nes_cm_stop(void);
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int nes_add_ref_cm_node(struct nes_cm_node *cm_node);
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int nes_rem_ref_cm_node(struct nes_cm_node *cm_node);
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#endif /* NES_CM_H */
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