i40iw: add connection management code
i40iw_cm.c i40iw_cm.h are used for connection management.
changes since v2:
Implemented interface changes as reg_phys_mr() is
not part of inifiniband interface Done as
Christoph Hellwig <hch@infradead.org> did for nes.
Changes since v1:
improved casts
moved kmap() from i40iw_verbs.c to make them short
lived.
Acked-by: Anjali Singhai Jain <anjali.singhai@intel.com>
Acked-by: Shannon Nelson <shannon.nelson@intel.com>
Signed-off-by: Faisal Latif <faisal.latif@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
diff --git a/drivers/infiniband/hw/i40iw/i40iw_cm.h b/drivers/infiniband/hw/i40iw/i40iw_cm.h
new file mode 100644
index 0000000..5f8ceb4
--- /dev/null
+++ b/drivers/infiniband/hw/i40iw/i40iw_cm.h
@@ -0,0 +1,456 @@
+/*******************************************************************************
+*
+* Copyright (c) 2015 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
+* OpenFabrics.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 I40IW_CM_H
+#define I40IW_CM_H
+
+#define QUEUE_EVENTS
+
+#define I40IW_MANAGE_APBVT_DEL 0
+#define I40IW_MANAGE_APBVT_ADD 1
+
+#define I40IW_MPA_REQUEST_ACCEPT 1
+#define I40IW_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
+#define SNDMARKER_SEQNMASK 0x000001FF
+
+#define I40IW_MAX_IETF_SIZE 32
+
+#define MPA_ZERO_PAD_LEN 4
+
+/* 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
+
+/* HW-supported IRD sizes*/
+#define I40IW_HW_IRD_SETTING_2 2
+#define I40IW_HW_IRD_SETTING_4 4
+#define I40IW_HW_IRD_SETTING_8 8
+#define I40IW_HW_IRD_SETTING_16 16
+#define I40IW_HW_IRD_SETTING_32 32
+#define I40IW_HW_IRD_SETTING_64 64
+
+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 i40iw_cm_node;
+enum i40iw_timer_type {
+ I40IW_TIMER_TYPE_SEND,
+ I40IW_TIMER_TYPE_RECV,
+ I40IW_TIMER_NODE_CLEANUP,
+ I40IW_TIMER_TYPE_CLOSE,
+};
+
+#define I40IW_PASSIVE_STATE_INDICATED 0
+#define I40IW_DO_NOT_SEND_RESET_EVENT 1
+#define I40IW_SEND_RESET_EVENT 2
+
+#define MAX_I40IW_IFS 4
+
+#define SET_ACK 0x1
+#define SET_SYN 0x2
+#define SET_FIN 0x4
+#define SET_RST 0x8
+
+#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 i40iw_timer_entry {
+ struct list_head list;
+ unsigned long timetosend; /* jiffies */
+ struct i40iw_puda_buf *sqbuf;
+ u32 type;
+ u32 retrycount;
+ u32 retranscount;
+ u32 context;
+ u32 send_retrans;
+ int close_when_complete;
+};
+
+#define I40IW_DEFAULT_RETRYS 64
+#define I40IW_DEFAULT_RETRANS 8
+#define I40IW_DEFAULT_TTL 0x40
+#define I40IW_DEFAULT_RTT_VAR 0x6
+#define I40IW_DEFAULT_SS_THRESH 0x3FFFFFFF
+#define I40IW_DEFAULT_REXMIT_THRESH 8
+
+#define I40IW_RETRY_TIMEOUT HZ
+#define I40IW_SHORT_TIME 10
+#define I40IW_LONG_TIME (2 * HZ)
+#define I40IW_MAX_TIMEOUT ((unsigned long)(12 * HZ))
+
+#define I40IW_CM_HASHTABLE_SIZE 1024
+#define I40IW_CM_TCP_TIMER_INTERVAL 3000
+#define I40IW_CM_DEFAULT_MTU 1540
+#define I40IW_CM_DEFAULT_FRAME_CNT 10
+#define I40IW_CM_THREAD_STACK_SIZE 256
+#define I40IW_CM_DEFAULT_RCV_WND 64240
+#define I40IW_CM_DEFAULT_RCV_WND_SCALED 0x3fffc
+#define I40IW_CM_DEFAULT_RCV_WND_SCALE 2
+#define I40IW_CM_DEFAULT_FREE_PKTS 0x000A
+#define I40IW_CM_FREE_PKT_LO_WATERMARK 2
+
+#define I40IW_CM_DEFAULT_MSS 536
+
+#define I40IW_CM_DEF_SEQ 0x159bf75f
+#define I40IW_CM_DEF_LOCAL_ID 0x3b47
+
+#define I40IW_CM_DEF_SEQ2 0x18ed5740
+#define I40IW_CM_DEF_LOCAL_ID2 0xb807
+#define MAX_CM_BUFFER (I40IW_MAX_IETF_SIZE + IETF_MAX_PRIV_DATA_LEN)
+
+typedef u32 i40iw_addr_t;
+
+#define i40iw_cm_tsa_context i40iw_qp_context
+
+struct i40iw_qp;
+
+/* cm node transition states */
+enum i40iw_cm_node_state {
+ I40IW_CM_STATE_UNKNOWN,
+ I40IW_CM_STATE_INITED,
+ I40IW_CM_STATE_LISTENING,
+ I40IW_CM_STATE_SYN_RCVD,
+ I40IW_CM_STATE_SYN_SENT,
+ I40IW_CM_STATE_ONE_SIDE_ESTABLISHED,
+ I40IW_CM_STATE_ESTABLISHED,
+ I40IW_CM_STATE_ACCEPTING,
+ I40IW_CM_STATE_MPAREQ_SENT,
+ I40IW_CM_STATE_MPAREQ_RCVD,
+ I40IW_CM_STATE_MPAREJ_RCVD,
+ I40IW_CM_STATE_OFFLOADED,
+ I40IW_CM_STATE_FIN_WAIT1,
+ I40IW_CM_STATE_FIN_WAIT2,
+ I40IW_CM_STATE_CLOSE_WAIT,
+ I40IW_CM_STATE_TIME_WAIT,
+ I40IW_CM_STATE_LAST_ACK,
+ I40IW_CM_STATE_CLOSING,
+ I40IW_CM_STATE_LISTENER_DESTROYED,
+ I40IW_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 i40iw_tcpip_pkt_type {
+ I40IW_PKT_TYPE_UNKNOWN,
+ I40IW_PKT_TYPE_SYN,
+ I40IW_PKT_TYPE_SYNACK,
+ I40IW_PKT_TYPE_ACK,
+ I40IW_PKT_TYPE_FIN,
+ I40IW_PKT_TYPE_RST
+};
+
+/* CM context params */
+struct i40iw_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 timeval sent_ts;
+};
+
+enum i40iw_cm_listener_state {
+ I40IW_CM_LISTENER_PASSIVE_STATE = 1,
+ I40IW_CM_LISTENER_ACTIVE_STATE = 2,
+ I40IW_CM_LISTENER_EITHER_STATE = 3
+};
+
+struct i40iw_cm_listener {
+ struct list_head list;
+ struct i40iw_cm_core *cm_core;
+ u8 loc_mac[ETH_ALEN];
+ u32 loc_addr[4];
+ u16 loc_port;
+ u32 map_loc_addr[4];
+ u16 map_loc_port;
+ struct iw_cm_id *cm_id;
+ atomic_t ref_count;
+ struct i40iw_device *iwdev;
+ atomic_t pend_accepts_cnt;
+ int backlog;
+ enum i40iw_cm_listener_state listener_state;
+ u32 reused_node;
+ u8 user_pri;
+ u16 vlan_id;
+ bool qhash_set;
+ bool ipv4;
+ struct list_head child_listen_list;
+
+};
+
+struct i40iw_kmem_info {
+ void *addr;
+ u32 size;
+};
+
+/* per connection node and node state information */
+struct i40iw_cm_node {
+ u32 loc_addr[4], rem_addr[4];
+ u16 loc_port, rem_port;
+ u32 map_loc_addr[4], map_rem_addr[4];
+ u16 map_loc_port, map_rem_port;
+ u16 vlan_id;
+ enum i40iw_cm_node_state state;
+ u8 loc_mac[ETH_ALEN];
+ u8 rem_mac[ETH_ALEN];
+ atomic_t ref_count;
+ struct i40iw_qp *iwqp;
+ struct i40iw_device *iwdev;
+ struct i40iw_sc_dev *dev;
+ struct i40iw_cm_tcp_context tcp_cntxt;
+ struct i40iw_cm_core *cm_core;
+ struct i40iw_cm_node *loopbackpartner;
+ struct i40iw_timer_entry *send_entry;
+ struct i40iw_timer_entry *close_entry;
+ spinlock_t retrans_list_lock; /* cm transmit packet */
+ enum send_rdma0 send_rdma0_op;
+ u16 ird_size;
+ u16 ord_size;
+ u16 mpav2_ird_ord;
+ struct iw_cm_id *cm_id;
+ struct list_head list;
+ int accelerated;
+ struct i40iw_cm_listener *listener;
+ int apbvt_set;
+ int accept_pend;
+ struct list_head timer_entry;
+ struct list_head reset_entry;
+ atomic_t passive_state;
+ bool qhash_set;
+ u8 user_pri;
+ bool ipv4;
+ bool snd_mark_en;
+ u16 lsmm_size;
+ enum mpa_frame_version mpa_frame_rev;
+ struct i40iw_kmem_info pdata;
+ union {
+ struct ietf_mpa_v1 mpa_frame;
+ struct ietf_mpa_v2 mpa_v2_frame;
+ };
+
+ u8 pdata_buf[IETF_MAX_PRIV_DATA_LEN];
+ struct i40iw_kmem_info mpa_hdr;
+};
+
+/* structure for client or CM to fill when making CM api calls. */
+/* - only need to set relevant data, based on op. */
+struct i40iw_cm_info {
+ struct iw_cm_id *cm_id;
+ u16 loc_port;
+ u16 rem_port;
+ u32 loc_addr[4];
+ u32 rem_addr[4];
+ u16 map_loc_port;
+ u16 map_rem_port;
+ u32 map_loc_addr[4];
+ u32 map_rem_addr[4];
+ u16 vlan_id;
+ int backlog;
+ u16 user_pri;
+ bool ipv4;
+};
+
+/* CM event codes */
+enum i40iw_cm_event_type {
+ I40IW_CM_EVENT_UNKNOWN,
+ I40IW_CM_EVENT_ESTABLISHED,
+ I40IW_CM_EVENT_MPA_REQ,
+ I40IW_CM_EVENT_MPA_CONNECT,
+ I40IW_CM_EVENT_MPA_ACCEPT,
+ I40IW_CM_EVENT_MPA_REJECT,
+ I40IW_CM_EVENT_MPA_ESTABLISHED,
+ I40IW_CM_EVENT_CONNECTED,
+ I40IW_CM_EVENT_RESET,
+ I40IW_CM_EVENT_ABORTED
+};
+
+/* event to post to CM event handler */
+struct i40iw_cm_event {
+ enum i40iw_cm_event_type type;
+ struct i40iw_cm_info cm_info;
+ struct work_struct event_work;
+ struct i40iw_cm_node *cm_node;
+};
+
+struct i40iw_cm_core {
+ struct i40iw_device *iwdev;
+ struct i40iw_sc_dev *dev;
+
+ struct list_head listen_nodes;
+ struct list_head connected_nodes;
+
+ struct timer_list tcp_timer;
+
+ struct workqueue_struct *event_wq;
+ struct workqueue_struct *disconn_wq;
+
+ spinlock_t ht_lock; /* manage hash table */
+ spinlock_t listen_list_lock; /* listen list */
+
+ u64 stats_nodes_created;
+ u64 stats_nodes_destroyed;
+ u64 stats_listen_created;
+ u64 stats_listen_destroyed;
+ u64 stats_listen_nodes_created;
+ u64 stats_listen_nodes_destroyed;
+ u64 stats_loopbacks;
+ u64 stats_accepts;
+ u64 stats_rejects;
+ u64 stats_connect_errs;
+ u64 stats_passive_errs;
+ u64 stats_pkt_retrans;
+ u64 stats_backlog_drops;
+};
+
+int i40iw_schedule_cm_timer(struct i40iw_cm_node *cm_node,
+ struct i40iw_puda_buf *sqbuf,
+ enum i40iw_timer_type type,
+ int send_retrans,
+ int close_when_complete);
+
+int i40iw_accept(struct iw_cm_id *, struct iw_cm_conn_param *);
+int i40iw_reject(struct iw_cm_id *, const void *, u8);
+int i40iw_connect(struct iw_cm_id *, struct iw_cm_conn_param *);
+int i40iw_create_listen(struct iw_cm_id *, int);
+int i40iw_destroy_listen(struct iw_cm_id *);
+
+int i40iw_cm_start(struct i40iw_device *);
+int i40iw_cm_stop(struct i40iw_device *);
+
+int i40iw_arp_table(struct i40iw_device *iwdev,
+ u32 *ip_addr,
+ bool ipv4,
+ u8 *mac_addr,
+ u32 action);
+
+#endif /* I40IW_CM_H */