RDMA/nes: Add a driver for NetEffect RNICs

Add a standard NIC and RDMA/iWARP driver for NetEffect 1/10Gb ethernet adapters.

Signed-off-by: Glenn Streiff <gstreiff@neteffect.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

1 files changed, 433 insertions, 0 deletions

diff --git a/drivers/infiniband/hw/nes/nes_cm.h b/drivers/infiniband/hw/nes/nes_cm.h
new file mode 100644
index 0000000..a59f0a7
--- /dev/null
+++ b/drivers/infiniband/hw/nes/nes_cm.h
@@ -0,0 +1,433 @@
+/*
+ * Copyright (c) 2006 - 2008 NetEffect, 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 NES_CM_H
+#define NES_CM_H
+
+#define QUEUE_EVENTS
+
+#define NES_MANAGE_APBVT_DEL 0
+#define NES_MANAGE_APBVT_ADD 1
+
+/* 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
+
+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_frame {
+	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 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 MAX_NES_IFS 4
+
+#define SET_ACK 1
+#define SET_SYN 2
+#define SET_FIN 4
+#define SET_RST 8
+
+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_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
+
+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_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_CLOSED
+};
+
+/* 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;
+	struct timeval            sent_ts;
+};
+
+
+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;
+	u64                        session_id;
+	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;
+};
+
+/* per connection node and node state information */
+struct nes_cm_node {
+	u64                       session_id;
+	u32                       hashkey;
+
+	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 list_head          retrans_list;
+	spinlock_t                retrans_list_lock;
+	struct list_head          recv_list;
+	spinlock_t                recv_list_lock;
+
+	int                       send_write0;
+	union {
+		struct ietf_mpa_frame mpa_frame;
+		u8                    mpa_frame_buf[NES_CM_DEFAULT_MTU];
+	};
+	u16                       mpa_frame_size;
+	struct iw_cm_id           *cm_id;
+	struct list_head          list;
+	int                       accelerated;
+	struct nes_cm_listener    *listener;
+	enum nes_cm_conn_type     conn_type;
+	struct nes_vnic           *nesvnic;
+	int                       apbvt_set;
+	int                       accept_pend;
+};
+
+/* 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_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                session_id;
+
+	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;
+	struct sk_buff_head     tx_free_list;
+	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;
+
+	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 *, struct ietf_mpa_frame *,
+			struct nes_cm_info *);
+	int (*close)(struct nes_cm_core *, struct nes_cm_node *);
+	int (*accept)(struct nes_cm_core *, struct ietf_mpa_frame *,
+			struct nes_cm_node *);
+	int (*reject)(struct nes_cm_core *, struct ietf_mpa_frame *,
+			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 send_mpa_request(struct nes_cm_node *);
+struct sk_buff *form_cm_frame(struct sk_buff *, struct nes_cm_node *,
+		void *, u32, void *, u32, u8);
+int schedule_nes_timer(struct nes_cm_node *, struct sk_buff *,
+		enum nes_timer_type, int, int);
+void nes_cm_timer_tick(unsigned long);
+int send_syn(struct nes_cm_node *, u32);
+int send_reset(struct nes_cm_node *);
+int send_ack(struct nes_cm_node *);
+int send_fin(struct nes_cm_node *, struct sk_buff *);
+struct sk_buff *get_free_pkt(struct nes_cm_node *);
+int process_packet(struct nes_cm_node *, struct sk_buff *, struct nes_cm_core *);
+
+struct nes_cm_node * mini_cm_connect(struct nes_cm_core *,
+		struct nes_vnic *, struct ietf_mpa_frame *, struct nes_cm_info *);
+int mini_cm_accept(struct nes_cm_core *, struct ietf_mpa_frame *, struct nes_cm_node *);
+int mini_cm_reject(struct nes_cm_core *, struct ietf_mpa_frame *, struct nes_cm_node *);
+int mini_cm_close(struct nes_cm_core *, struct nes_cm_node *);
+int mini_cm_recv_pkt(struct nes_cm_core *, struct nes_vnic *, struct sk_buff *);
+struct nes_cm_core *mini_cm_alloc_core(struct nes_cm_info *);
+int mini_cm_dealloc_core(struct nes_cm_core *);
+int mini_cm_get(struct nes_cm_core *);
+int mini_cm_set(struct nes_cm_core *, u32, u32);
+
+int nes_cm_disconn(struct nes_qp *);
+void nes_disconnect_worker(struct work_struct *);
+int nes_cm_disconn_true(struct nes_qp *);
+int nes_disconnect(struct nes_qp *, 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);
+
+/* CM event handler functions */
+void cm_event_connected(struct nes_cm_event *);
+void cm_event_connect_error(struct nes_cm_event *);
+void cm_event_reset(struct nes_cm_event *);
+void cm_event_mpa_req(struct nes_cm_event *);
+int nes_cm_post_event(struct nes_cm_event *);
+
+#endif			/* NES_CM_H */