rdma: Remove nes

This driver was first merged over 10 years ago and has not seen major
activity by the authors in the last 7 years. However, in that time it has
been patched 150 times to adapt it to changing kernel APIs.

Further, the hardware has several issues, like not supporting 64 bit DMA,
that make it rather uninteresting for use with modern systems and RDMA.

Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Reviewed-by: Leon Romanovsky <leonro@mellanox.com>
Reviewed-by: Shiraz Saleem <shiraz.saleem@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>

1 files changed, 0 insertions, 470 deletions

diff --git a/drivers/infiniband/hw/nes/nes_cm.h b/drivers/infiniband/hw/nes/nes_cm.h
deleted file mode 100644
index b9cc02b4e8d5..000000000000
--- a/drivers/infiniband/hw/nes/nes_cm.h
+++ /dev/null
@@ -1,470 +0,0 @@
-/*
- * Copyright (c) 2006 - 2014 Intel Corporation.  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 NES_CM_H
-#define NES_CM_H
-
-#define QUEUE_EVENTS
-
-#define NES_MANAGE_APBVT_DEL 0
-#define NES_MANAGE_APBVT_ADD 1
-
-#define NES_MPA_REQUEST_ACCEPT  1
-#define NES_MPA_REQUEST_REJECT  2
-
-/* IETF MPA -- defines, enums, structs */
-#define IEFT_MPA_KEY_REQ  "MPA ID Req Frame"
-#define IEFT_MPA_KEY_REP  "MPA ID Rep Frame"
-#define IETF_MPA_KEY_SIZE 16
-#define IETF_MPA_VERSION  1
-#define IETF_MAX_PRIV_DATA_LEN 512
-#define IETF_MPA_FRAME_SIZE    20
-#define IETF_RTR_MSG_SIZE      4
-#define IETF_MPA_V2_FLAG       0x10
-
-/* IETF RTR MSG Fields               */
-#define IETF_PEER_TO_PEER       0x8000
-#define IETF_FLPDU_ZERO_LEN     0x4000
-#define IETF_RDMA0_WRITE        0x8000
-#define IETF_RDMA0_READ         0x4000
-#define IETF_NO_IRD_ORD         0x3FFF
-#define NES_MAX_IRD		 0x40
-#define NES_MAX_ORD		 0x7F
-
-enum ietf_mpa_flags {
-	IETF_MPA_FLAGS_MARKERS = 0x80,	/* receive Markers */
-	IETF_MPA_FLAGS_CRC     = 0x40,	/* receive Markers */
-	IETF_MPA_FLAGS_REJECT  = 0x20,	/* Reject */
-};
-
-struct ietf_mpa_v1 {
-	u8 key[IETF_MPA_KEY_SIZE];
-	u8 flags;
-	u8 rev;
-	__be16 priv_data_len;
-	u8 priv_data[0];
-};
-
-#define ietf_mpa_req_resp_frame ietf_mpa_frame
-
-struct ietf_rtr_msg {
-	__be16 ctrl_ird;
-	__be16 ctrl_ord;
-};
-
-struct ietf_mpa_v2 {
-	u8 key[IETF_MPA_KEY_SIZE];
-	u8 flags;
-	u8 rev;
-	 __be16 priv_data_len;
-	struct ietf_rtr_msg rtr_msg;
-	u8 priv_data[0];
-};
-
-struct nes_v4_quad {
-	u32 rsvd0;
-	__le32 DstIpAdrIndex;	/* Only most significant 5 bits are valid */
-	__be32 SrcIpadr;
-	__be16 TcpPorts[2];		/* src is low, dest is high */
-};
-
-struct nes_cm_node;
-enum nes_timer_type {
-	NES_TIMER_TYPE_SEND,
-	NES_TIMER_TYPE_RECV,
-	NES_TIMER_NODE_CLEANUP,
-	NES_TIMER_TYPE_CLOSE,
-};
-
-#define NES_PASSIVE_STATE_INDICATED	0
-#define NES_DO_NOT_SEND_RESET_EVENT	1
-#define NES_SEND_RESET_EVENT		2
-
-#define MAX_NES_IFS 4
-
-#define SET_ACK 1
-#define SET_SYN 2
-#define SET_FIN 4
-#define SET_RST 8
-
-#define TCP_OPTIONS_PADDING	3
-
-struct option_base {
-	u8 optionnum;
-	u8 length;
-};
-
-enum option_numbers {
-	OPTION_NUMBER_END,
-	OPTION_NUMBER_NONE,
-	OPTION_NUMBER_MSS,
-	OPTION_NUMBER_WINDOW_SCALE,
-	OPTION_NUMBER_SACK_PERM,
-	OPTION_NUMBER_SACK,
-	OPTION_NUMBER_WRITE0 = 0xbc
-};
-
-struct option_mss {
-	u8 optionnum;
-	u8 length;
-	__be16 mss;
-};
-
-struct option_windowscale {
-	u8 optionnum;
-	u8 length;
-	u8 shiftcount;
-};
-
-union all_known_options {
-	char as_end;
-	struct option_base as_base;
-	struct option_mss as_mss;
-	struct option_windowscale as_windowscale;
-};
-
-struct nes_timer_entry {
-	struct list_head list;
-	unsigned long timetosend;	/* jiffies */
-	struct sk_buff *skb;
-	u32 type;
-	u32 retrycount;
-	u32 retranscount;
-	u32 context;
-	u32 seq_num;
-	u32 send_retrans;
-	int close_when_complete;
-	struct net_device *netdev;
-};
-
-#define NES_DEFAULT_RETRYS  64
-#define NES_DEFAULT_RETRANS 8
-#ifdef CONFIG_INFINIBAND_NES_DEBUG
-#define NES_RETRY_TIMEOUT   (1000*HZ/1000)
-#else
-#define NES_RETRY_TIMEOUT   (3000*HZ/1000)
-#endif
-#define NES_SHORT_TIME      (10)
-#define NES_LONG_TIME       (2000*HZ/1000)
-#define NES_MAX_TIMEOUT     ((unsigned long) (12*HZ))
-
-#define NES_CM_HASHTABLE_SIZE         1024
-#define NES_CM_TCP_TIMER_INTERVAL     3000
-#define NES_CM_DEFAULT_MTU            1540
-#define NES_CM_DEFAULT_FRAME_CNT      10
-#define NES_CM_THREAD_STACK_SIZE      256
-#define NES_CM_DEFAULT_RCV_WND        64240	// before we know that window scaling is allowed
-#define NES_CM_DEFAULT_RCV_WND_SCALED 256960  // after we know that window scaling is allowed
-#define NES_CM_DEFAULT_RCV_WND_SCALE  2
-#define NES_CM_DEFAULT_FREE_PKTS      0x000A
-#define NES_CM_FREE_PKT_LO_WATERMARK  2
-
-#define NES_CM_DEFAULT_MSS   536
-
-#define NES_CM_DEF_SEQ       0x159bf75f
-#define NES_CM_DEF_LOCAL_ID  0x3b47
-
-#define NES_CM_DEF_SEQ2      0x18ed5740
-#define NES_CM_DEF_LOCAL_ID2 0xb807
-#define	MAX_CM_BUFFER	(IETF_MPA_FRAME_SIZE + IETF_RTR_MSG_SIZE + IETF_MAX_PRIV_DATA_LEN)
-
-typedef u32 nes_addr_t;
-
-#define nes_cm_tsa_context nes_qp_context
-
-struct nes_qp;
-
-/* cm node transition states */
-enum nes_cm_node_state {
-	NES_CM_STATE_UNKNOWN,
-	NES_CM_STATE_INITED,
-	NES_CM_STATE_LISTENING,
-	NES_CM_STATE_SYN_RCVD,
-	NES_CM_STATE_SYN_SENT,
-	NES_CM_STATE_ONE_SIDE_ESTABLISHED,
-	NES_CM_STATE_ESTABLISHED,
-	NES_CM_STATE_ACCEPTING,
-	NES_CM_STATE_MPAREQ_SENT,
-	NES_CM_STATE_MPAREQ_RCVD,
-	NES_CM_STATE_MPAREJ_RCVD,
-	NES_CM_STATE_TSA,
-	NES_CM_STATE_FIN_WAIT1,
-	NES_CM_STATE_FIN_WAIT2,
-	NES_CM_STATE_CLOSE_WAIT,
-	NES_CM_STATE_TIME_WAIT,
-	NES_CM_STATE_LAST_ACK,
-	NES_CM_STATE_CLOSING,
-	NES_CM_STATE_LISTENER_DESTROYED,
-	NES_CM_STATE_CLOSED
-};
-
-enum mpa_frame_version {
-	IETF_MPA_V1 = 1,
-	IETF_MPA_V2 = 2
-};
-
-enum mpa_frame_key {
-	MPA_KEY_REQUEST,
-	MPA_KEY_REPLY
-};
-
-enum send_rdma0 {
-	SEND_RDMA_READ_ZERO = 1,
-	SEND_RDMA_WRITE_ZERO = 2
-};
-
-enum nes_tcpip_pkt_type {
-	NES_PKT_TYPE_UNKNOWN,
-	NES_PKT_TYPE_SYN,
-	NES_PKT_TYPE_SYNACK,
-	NES_PKT_TYPE_ACK,
-	NES_PKT_TYPE_FIN,
-	NES_PKT_TYPE_RST
-};
-
-
-/* type of nes connection */
-enum nes_cm_conn_type {
-	NES_CM_IWARP_CONN_TYPE,
-};
-
-/* CM context params */
-struct nes_cm_tcp_context {
-	u8  client;
-
-	u32 loc_seq_num;
-	u32 loc_ack_num;
-	u32 rem_ack_num;
-	u32 rcv_nxt;
-
-	u32 loc_id;
-	u32 rem_id;
-
-	u32 snd_wnd;
-	u32 max_snd_wnd;
-
-	u32 rcv_wnd;
-	u32 mss;
-	u8  snd_wscale;
-	u8  rcv_wscale;
-
-	struct nes_cm_tsa_context tsa_cntxt;
-};
-
-
-enum nes_cm_listener_state {
-	NES_CM_LISTENER_PASSIVE_STATE = 1,
-	NES_CM_LISTENER_ACTIVE_STATE = 2,
-	NES_CM_LISTENER_EITHER_STATE = 3
-};
-
-struct nes_cm_listener {
-	struct list_head           list;
-	struct nes_cm_core         *cm_core;
-	u8                         loc_mac[ETH_ALEN];
-	nes_addr_t                 loc_addr;
-	u16                        loc_port;
-	struct iw_cm_id            *cm_id;
-	enum nes_cm_conn_type      conn_type;
-	atomic_t                   ref_count;
-	struct nes_vnic            *nesvnic;
-	atomic_t                   pend_accepts_cnt;
-	int                        backlog;
-	enum nes_cm_listener_state listener_state;
-	u32                        reused_node;
-	u8			   tos;
-};
-
-/* per connection node and node state information */
-struct nes_cm_node {
-	nes_addr_t                loc_addr, rem_addr;
-	u16                       loc_port, rem_port;
-
-	u8                        loc_mac[ETH_ALEN];
-	u8                        rem_mac[ETH_ALEN];
-
-	enum nes_cm_node_state    state;
-	struct nes_cm_tcp_context tcp_cntxt;
-	struct nes_cm_core        *cm_core;
-	struct sk_buff_head       resend_list;
-	atomic_t                  ref_count;
-	struct net_device         *netdev;
-
-	struct nes_cm_node        *loopbackpartner;
-
-	struct nes_timer_entry	  *send_entry;
-	struct nes_timer_entry    *recv_entry;
-	spinlock_t                retrans_list_lock;
-	enum send_rdma0           send_rdma0_op;
-
-	union {
-		struct ietf_mpa_v1 mpa_frame;
-		struct ietf_mpa_v2 mpa_v2_frame;
-		u8                 mpa_frame_buf[MAX_CM_BUFFER];
-	};
-	enum mpa_frame_version    mpa_frame_rev;
-	u16			  ird_size;
-	u16                       ord_size;
-	u16			  mpav2_ird_ord;
-
-	u16                       mpa_frame_size;
-	struct iw_cm_id           *cm_id;
-	struct list_head          list;
-	bool                      accelerated;
-	struct nes_cm_listener    *listener;
-	enum nes_cm_conn_type     conn_type;
-	struct nes_vnic           *nesvnic;
-	int                       apbvt_set;
-	int                       accept_pend;
-	struct list_head	timer_entry;
-	struct list_head	reset_entry;
-	struct nes_qp		*nesqp;
-	atomic_t 		passive_state;
-	u8			tos;
-};
-
-/* structure for client or CM to fill when making CM api calls. */
-/*	- only need to set relevant data, based on op. */
-struct nes_cm_info {
-	union {
-		struct iw_cm_id   *cm_id;
-		struct net_device *netdev;
-	};
-
-	u16 loc_port;
-	u16 rem_port;
-	nes_addr_t loc_addr;
-	nes_addr_t rem_addr;
-	enum nes_cm_conn_type  conn_type;
-	int backlog;
-};
-
-/* CM event codes */
-enum  nes_cm_event_type {
-	NES_CM_EVENT_UNKNOWN,
-	NES_CM_EVENT_ESTABLISHED,
-	NES_CM_EVENT_MPA_REQ,
-	NES_CM_EVENT_MPA_CONNECT,
-	NES_CM_EVENT_MPA_ACCEPT,
-	NES_CM_EVENT_MPA_REJECT,
-	NES_CM_EVENT_MPA_ESTABLISHED,
-	NES_CM_EVENT_CONNECTED,
-	NES_CM_EVENT_CLOSED,
-	NES_CM_EVENT_RESET,
-	NES_CM_EVENT_DROPPED_PKT,
-	NES_CM_EVENT_CLOSE_IMMED,
-	NES_CM_EVENT_CLOSE_HARD,
-	NES_CM_EVENT_CLOSE_CLEAN,
-	NES_CM_EVENT_ABORTED,
-	NES_CM_EVENT_SEND_FIRST
-};
-
-/* event to post to CM event handler */
-struct nes_cm_event {
-	enum nes_cm_event_type type;
-
-	struct nes_cm_info cm_info;
-	struct work_struct event_work;
-	struct nes_cm_node *cm_node;
-};
-
-struct nes_cm_core {
-	enum nes_cm_node_state  state;
-
-	atomic_t                listen_node_cnt;
-	struct nes_cm_node      listen_list;
-	spinlock_t              listen_list_lock;
-
-	u32                     mtu;
-	u32                     free_tx_pkt_max;
-	u32                     rx_pkt_posted;
-	atomic_t                ht_node_cnt;
-	struct list_head        connected_nodes;
-	/* struct list_head hashtable[NES_CM_HASHTABLE_SIZE]; */
-	spinlock_t              ht_lock;
-
-	struct timer_list       tcp_timer;
-
-	const struct nes_cm_ops *api;
-
-	int (*post_event)(struct nes_cm_event *event);
-	atomic_t                events_posted;
-	struct workqueue_struct *event_wq;
-	struct workqueue_struct *disconn_wq;
-
-	atomic_t                node_cnt;
-	u64                     aborted_connects;
-	u32                     options;
-
-	struct nes_cm_node      *current_listen_node;
-};
-
-
-#define NES_CM_SET_PKT_SIZE        (1 << 1)
-#define NES_CM_SET_FREE_PKT_Q_SIZE (1 << 2)
-
-/* CM ops/API for client interface */
-struct nes_cm_ops {
-	int (*accelerated)(struct nes_cm_core *, struct nes_cm_node *);
-	struct nes_cm_listener * (*listen)(struct nes_cm_core *, struct nes_vnic *,
-			struct nes_cm_info *);
-	int (*stop_listener)(struct nes_cm_core *, struct nes_cm_listener *);
-	struct nes_cm_node * (*connect)(struct nes_cm_core *,
-			struct nes_vnic *, u16, void *,
-			struct nes_cm_info *);
-	int (*close)(struct nes_cm_core *, struct nes_cm_node *);
-	int (*accept)(struct nes_cm_core *, struct nes_cm_node *);
-	int (*reject)(struct nes_cm_core *, struct nes_cm_node *);
-	int (*recv_pkt)(struct nes_cm_core *, struct nes_vnic *,
-			struct sk_buff *);
-	int (*destroy_cm_core)(struct nes_cm_core *);
-	int (*get)(struct nes_cm_core *);
-	int (*set)(struct nes_cm_core *, u32, u32);
-};
-
-int schedule_nes_timer(struct nes_cm_node *, struct sk_buff *,
-		enum nes_timer_type, int, int);
-
-int nes_accept(struct iw_cm_id *, struct iw_cm_conn_param *);
-int nes_reject(struct iw_cm_id *, const void *, u8);
-int nes_connect(struct iw_cm_id *, struct iw_cm_conn_param *);
-int nes_create_listen(struct iw_cm_id *, int);
-int nes_destroy_listen(struct iw_cm_id *);
-
-int nes_cm_recv(struct sk_buff *, struct net_device *);
-int nes_cm_start(void);
-int nes_cm_stop(void);
-int nes_add_ref_cm_node(struct nes_cm_node *cm_node);
-int nes_rem_ref_cm_node(struct nes_cm_node *cm_node);
-
-#endif			/* NES_CM_H */