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/*
* Copyright (c) 2004, 2005 Topspin Communications. All rights reserved.
* Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
* Copyright (c) 2004 Voltaire, Inc. All rights reserved.
*
* This software is available to you under a choice of one of two
* licenses. You may choose to be licensed under the terms of the GNU
* General Public License (GPL) Version 2, available from the file
* COPYING in the main directory of this source tree, or the
* OpenIB.org BSD license below:
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* - Redistributions of source code must retain the above
* copyright notice, this list of conditions and the following
* disclaimer.
*
* - Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#ifndef _IPOIB_H
#define _IPOIB_H
#include <linux/list.h>
#include <linux/skbuff.h>
#include <linux/netdevice.h>
#include <linux/workqueue.h>
#include <linux/kref.h>
#include <linux/if_infiniband.h>
#include <linux/mutex.h>
#include <net/neighbour.h>
#include <net/sch_generic.h>
#include <linux/atomic.h>
#include <rdma/ib_verbs.h>
#include <rdma/ib_pack.h>
#include <rdma/ib_sa.h>
#include <linux/sched.h>
/* constants */
enum ipoib_flush_level {
IPOIB_FLUSH_LIGHT,
IPOIB_FLUSH_NORMAL,
IPOIB_FLUSH_HEAVY
};
enum {
IPOIB_ENCAP_LEN = 4,
IPOIB_PSEUDO_LEN = 20,
IPOIB_HARD_LEN = IPOIB_ENCAP_LEN + IPOIB_PSEUDO_LEN,
IPOIB_UD_HEAD_SIZE = IB_GRH_BYTES + IPOIB_ENCAP_LEN,
IPOIB_UD_RX_SG = 2, /* max buffer needed for 4K mtu */
IPOIB_CM_MTU = 0x10000 - 0x10, /* padding to align header to 16 */
IPOIB_CM_BUF_SIZE = IPOIB_CM_MTU + IPOIB_ENCAP_LEN,
IPOIB_CM_HEAD_SIZE = IPOIB_CM_BUF_SIZE % PAGE_SIZE,
IPOIB_CM_RX_SG = ALIGN(IPOIB_CM_BUF_SIZE, PAGE_SIZE) / PAGE_SIZE,
IPOIB_RX_RING_SIZE = 256,
IPOIB_TX_RING_SIZE = 128,
IPOIB_MAX_QUEUE_SIZE = 8192,
IPOIB_MIN_QUEUE_SIZE = 2,
IPOIB_CM_MAX_CONN_QP = 4096,
IPOIB_NUM_WC = 4,
IPOIB_MAX_PATH_REC_QUEUE = 3,
IPOIB_MAX_MCAST_QUEUE = 64,
IPOIB_FLAG_OPER_UP = 0,
IPOIB_FLAG_INITIALIZED = 1,
IPOIB_FLAG_ADMIN_UP = 2,
IPOIB_PKEY_ASSIGNED = 3,
IPOIB_FLAG_SUBINTERFACE = 5,
IPOIB_STOP_REAPER = 7,
IPOIB_FLAG_ADMIN_CM = 9,
IPOIB_FLAG_UMCAST = 10,
IPOIB_STOP_NEIGH_GC = 11,
IPOIB_NEIGH_TBL_FLUSH = 12,
IPOIB_FLAG_DEV_ADDR_SET = 13,
IPOIB_FLAG_DEV_ADDR_CTRL = 14,
IPOIB_FLAG_GOING_DOWN = 15,
IPOIB_MAX_BACKOFF_SECONDS = 16,
IPOIB_MCAST_FLAG_FOUND = 0, /* used in set_multicast_list */
IPOIB_MCAST_FLAG_SENDONLY = 1,
/*
* For IPOIB_MCAST_FLAG_BUSY
* When set, in flight join and mcast->mc is unreliable
* When clear and mcast->mc IS_ERR_OR_NULL, need to restart or
* haven't started yet
* When clear and mcast->mc is valid pointer, join was successful
*/
IPOIB_MCAST_FLAG_BUSY = 2,
IPOIB_MCAST_FLAG_ATTACHED = 3,
MAX_SEND_CQE = 16,
IPOIB_CM_COPYBREAK = 256,
IPOIB_NON_CHILD = 0,
IPOIB_LEGACY_CHILD = 1,
IPOIB_RTNL_CHILD = 2,
};
#define IPOIB_OP_RECV (1ul << 31)
#ifdef CONFIG_INFINIBAND_IPOIB_CM
#define IPOIB_OP_CM (1ul << 30)
#else
#define IPOIB_OP_CM (0)
#endif
#define IPOIB_QPN_MASK ((__force u32) cpu_to_be32(0xFFFFFF))
/* structs */
struct ipoib_header {
__be16 proto;
u16 reserved;
};
struct ipoib_pseudo_header {
u8 hwaddr[INFINIBAND_ALEN];
};
static inline void skb_add_pseudo_hdr(struct sk_buff *skb)
{
char *data = skb_push(skb, IPOIB_PSEUDO_LEN);
/*
* only the ipoib header is present now, make room for a dummy
* pseudo header and set skb field accordingly
*/
memset(data, 0, IPOIB_PSEUDO_LEN);
skb_reset_mac_header(skb);
skb_pull(skb, IPOIB_HARD_LEN);
}
/* Used for all multicast joins (broadcast, IPv4 mcast and IPv6 mcast) */
struct ipoib_mcast {
struct ib_sa_mcmember_rec mcmember;
struct ib_sa_multicast *mc;
struct ipoib_ah *ah;
struct rb_node rb_node;
struct list_head list;
unsigned long created;
unsigned long backoff;
unsigned long delay_until;
unsigned long flags;
unsigned char logcount;
struct list_head neigh_list;
struct sk_buff_head pkt_queue;
struct net_device *dev;
struct completion done;
};
struct ipoib_rx_buf {
struct sk_buff *skb;
u64 mapping[IPOIB_UD_RX_SG];
};
struct ipoib_tx_buf {
struct sk_buff *skb;
u64 mapping[MAX_SKB_FRAGS + 1];
};
struct ipoib_cm_tx_buf {
struct sk_buff *skb;
u64 mapping;
};
struct ib_cm_id;
struct ipoib_cm_data {
__be32 qpn; /* High byte MUST be ignored on receive */
__be32 mtu;
};
/*
* Quoting 10.3.1 Queue Pair and EE Context States:
*
* Note, for QPs that are associated with an SRQ, the Consumer should take the
* QP through the Error State before invoking a Destroy QP or a Modify QP to the
* Reset State. The Consumer may invoke the Destroy QP without first performing
* a Modify QP to the Error State and waiting for the Affiliated Asynchronous
* Last WQE Reached Event. However, if the Consumer does not wait for the
* Affiliated Asynchronous Last WQE Reached Event, then WQE and Data Segment
* leakage may occur. Therefore, it is good programming practice to tear down a
* QP that is associated with an SRQ by using the following process:
*
* - Put the QP in the Error State
* - Wait for the Affiliated Asynchronous Last WQE Reached Event;
* - either:
* drain the CQ by invoking the Poll CQ verb and either wait for CQ
* to be empty or the number of Poll CQ operations has exceeded
* CQ capacity size;
* - or
* post another WR that completes on the same CQ and wait for this
* WR to return as a WC;
* - and then invoke a Destroy QP or Reset QP.
*
* We use the second option and wait for a completion on the
* same CQ before destroying QPs attached to our SRQ.
*/
enum ipoib_cm_state {
IPOIB_CM_RX_LIVE,
IPOIB_CM_RX_ERROR, /* Ignored by stale task */
IPOIB_CM_RX_FLUSH /* Last WQE Reached event observed */
};
struct ipoib_cm_rx {
struct ib_cm_id *id;
struct ib_qp *qp;
struct ipoib_cm_rx_buf *rx_ring;
struct list_head list;
struct net_device *dev;
unsigned long jiffies;
enum ipoib_cm_state state;
int recv_count;
};
struct ipoib_cm_tx {
struct ib_cm_id *id;
struct ib_qp *qp;
struct list_head list;
struct net_device *dev;
struct ipoib_neigh *neigh;
struct ipoib_path *path;
struct ipoib_tx_buf *tx_ring;
unsigned tx_head;
unsigned tx_tail;
unsigned long flags;
u32 mtu;
unsigned max_send_sge
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