drivers/infiniband/hw/irdma/cm.h

   1 /* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */
   2 /* Copyright (c) 2015 - 2021 Intel Corporation */
   3 #ifndef IRDMA_CM_H
   4 #define IRDMA_CM_H
   5
   6 #define IRDMA_MPA_REQUEST_ACCEPT        1
   7 #define IRDMA_MPA_REQUEST_REJECT        2
   8
   9 /* IETF MPA -- defines */
  10 #define IEFT_MPA_KEY_REQ        "MPA ID Req Frame"
  11 #define IEFT_MPA_KEY_REP        "MPA ID Rep Frame"
  12 #define IETF_MPA_KEY_SIZE       16
  13 #define IETF_MPA_VER            1
  14 #define IETF_MAX_PRIV_DATA_LEN  512
  15 #define IETF_MPA_FRAME_SIZE     20
  16 #define IETF_RTR_MSG_SIZE       4
  17 #define IETF_MPA_V2_FLAG        0x10
  18 #define SNDMARKER_SEQNMASK      0x000001ff
  19 #define IRDMA_MAX_IETF_SIZE     32
  20
  21 /* IETF RTR MSG Fields */
  22 #define IETF_PEER_TO_PEER       0x8000
  23 #define IETF_FLPDU_ZERO_LEN     0x4000
  24 #define IETF_RDMA0_WRITE        0x8000
  25 #define IETF_RDMA0_READ         0x4000
  26 #define IETF_NO_IRD_ORD         0x3fff
  27
  28 #define MAX_PORTS       65536
  29
  30 #define IRDMA_PASSIVE_STATE_INDICATED   0
  31 #define IRDMA_DO_NOT_SEND_RESET_EVENT   1
  32 #define IRDMA_SEND_RESET_EVENT          2
  33
  34 #define MAX_IRDMA_IFS   4
  35
  36 #define SET_ACK         1
  37 #define SET_SYN         2
  38 #define SET_FIN         4
  39 #define SET_RST         8
  40
  41 #define TCP_OPTIONS_PADDING     3
  42
  43 #define IRDMA_DEFAULT_RETRYS    64
  44 #define IRDMA_DEFAULT_RETRANS   32
  45 #define IRDMA_DEFAULT_TTL               0x40
  46 #define IRDMA_DEFAULT_RTT_VAR           6
  47 #define IRDMA_DEFAULT_SS_THRESH         0x3fffffff
  48 #define IRDMA_DEFAULT_REXMIT_THRESH     8
  49
  50 #define IRDMA_RETRY_TIMEOUT     HZ
  51 #define IRDMA_SHORT_TIME        10
  52 #define IRDMA_LONG_TIME         (2 * HZ)
  53 #define IRDMA_MAX_TIMEOUT       ((unsigned long)(12 * HZ))
  54
  55 #define IRDMA_CM_HASHTABLE_SIZE         1024
  56 #define IRDMA_CM_TCP_TIMER_INTERVAL     3000
  57 #define IRDMA_CM_DEFAULT_MTU            1540
  58 #define IRDMA_CM_DEFAULT_FRAME_CNT      10
  59 #define IRDMA_CM_THREAD_STACK_SIZE      256
  60 #define IRDMA_CM_DEFAULT_RCV_WND        64240
  61 #define IRDMA_CM_DEFAULT_RCV_WND_SCALED 0x3FFFC
  62 #define IRDMA_CM_DEFAULT_RCV_WND_SCALE  2
  63 #define IRDMA_CM_DEFAULT_FREE_PKTS      10
  64 #define IRDMA_CM_FREE_PKT_LO_WATERMARK  2
  65 #define IRDMA_CM_DEFAULT_MSS            536
  66 #define IRDMA_CM_DEFAULT_MPA_VER        2
  67 #define IRDMA_CM_DEFAULT_SEQ            0x159bf75f
  68 #define IRDMA_CM_DEFAULT_LOCAL_ID       0x3b47
  69 #define IRDMA_CM_DEFAULT_SEQ2           0x18ed5740
  70 #define IRDMA_CM_DEFAULT_LOCAL_ID2      0xb807
  71 #define IRDMA_MAX_CM_BUF                (IRDMA_MAX_IETF_SIZE + IETF_MAX_PRIV_DATA_LEN)
  72
  73 enum ietf_mpa_flags {
  74         IETF_MPA_FLAGS_REJECT  = 0x20,
  75         IETF_MPA_FLAGS_CRC     = 0x40,
  76         IETF_MPA_FLAGS_MARKERS = 0x80,
  77 };
  78
  79 enum irdma_timer_type {
  80         IRDMA_TIMER_TYPE_SEND,
  81         IRDMA_TIMER_TYPE_CLOSE,
  82 };
  83
  84 enum option_nums {
  85         OPTION_NUM_EOL,
  86         OPTION_NUM_NONE,
  87         OPTION_NUM_MSS,
  88         OPTION_NUM_WINDOW_SCALE,
  89         OPTION_NUM_SACK_PERM,
  90         OPTION_NUM_SACK,
  91         OPTION_NUM_WRITE0 = 0xbc,
  92 };
  93
  94 /* cm node transition states */
  95 enum irdma_cm_node_state {
  96         IRDMA_CM_STATE_UNKNOWN,
  97         IRDMA_CM_STATE_INITED,
  98         IRDMA_CM_STATE_LISTENING,
  99         IRDMA_CM_STATE_SYN_RCVD,
 100         IRDMA_CM_STATE_SYN_SENT,
 101         IRDMA_CM_STATE_ONE_SIDE_ESTABLISHED,
 102         IRDMA_CM_STATE_ESTABLISHED,
 103         IRDMA_CM_STATE_ACCEPTING,
 104         IRDMA_CM_STATE_MPAREQ_SENT,
 105         IRDMA_CM_STATE_MPAREQ_RCVD,
 106         IRDMA_CM_STATE_MPAREJ_RCVD,
 107         IRDMA_CM_STATE_OFFLOADED,
 108         IRDMA_CM_STATE_FIN_WAIT1,
 109         IRDMA_CM_STATE_FIN_WAIT2,
 110         IRDMA_CM_STATE_CLOSE_WAIT,
 111         IRDMA_CM_STATE_TIME_WAIT,
 112         IRDMA_CM_STATE_LAST_ACK,
 113         IRDMA_CM_STATE_CLOSING,
 114         IRDMA_CM_STATE_LISTENER_DESTROYED,
 115         IRDMA_CM_STATE_CLOSED,
 116 };
 117
 118 enum mpa_frame_ver {
 119         IETF_MPA_V1 = 1,
 120         IETF_MPA_V2 = 2,
 121 };
 122
 123 enum mpa_frame_key {
 124         MPA_KEY_REQUEST,
 125         MPA_KEY_REPLY,
 126 };
 127
 128 enum send_rdma0 {
 129         SEND_RDMA_READ_ZERO  = 1,
 130         SEND_RDMA_WRITE_ZERO = 2,
 131 };
 132
 133 enum irdma_tcpip_pkt_type {
 134         IRDMA_PKT_TYPE_UNKNOWN,
 135         IRDMA_PKT_TYPE_SYN,
 136         IRDMA_PKT_TYPE_SYNACK,
 137         IRDMA_PKT_TYPE_ACK,
 138         IRDMA_PKT_TYPE_FIN,
 139         IRDMA_PKT_TYPE_RST,
 140 };
 141
 142 enum irdma_cm_listener_state {
 143         IRDMA_CM_LISTENER_PASSIVE_STATE = 1,
 144         IRDMA_CM_LISTENER_ACTIVE_STATE  = 2,
 145         IRDMA_CM_LISTENER_EITHER_STATE  = 3,
 146 };
 147
 148 /* CM event codes */
 149 enum irdma_cm_event_type {
 150         IRDMA_CM_EVENT_UNKNOWN,
 151         IRDMA_CM_EVENT_ESTABLISHED,
 152         IRDMA_CM_EVENT_MPA_REQ,
 153         IRDMA_CM_EVENT_MPA_CONNECT,
 154         IRDMA_CM_EVENT_MPA_ACCEPT,
 155         IRDMA_CM_EVENT_MPA_REJECT,
 156         IRDMA_CM_EVENT_MPA_ESTABLISHED,
 157         IRDMA_CM_EVENT_CONNECTED,
 158         IRDMA_CM_EVENT_RESET,
 159         IRDMA_CM_EVENT_ABORTED,
 160 };
 161
 162 struct ietf_mpa_v1 {
 163         u8 key[IETF_MPA_KEY_SIZE];
 164         u8 flags;
 165         u8 rev;
 166         __be16 priv_data_len;
 167         u8 priv_data[];
 168 };
 169
 170 struct ietf_rtr_msg {
 171         __be16 ctrl_ird;
 172         __be16 ctrl_ord;
 173 };
 174
 175 struct ietf_mpa_v2 {
 176         u8 key[IETF_MPA_KEY_SIZE];
 177         u8 flags;
 178         u8 rev;
 179         __be16 priv_data_len;
 180         struct ietf_rtr_msg rtr_msg;
 181         u8 priv_data[];
 182 };
 183
 184 struct option_base {
 185         u8 optionnum;
 186         u8 len;
 187 };
 188
 189 struct option_mss {
 190         u8 optionnum;
 191         u8 len;
 192         __be16 mss;
 193 };
 194
 195 struct option_windowscale {
 196         u8 optionnum;
 197         u8 len;
 198         u8 shiftcount;
 199 };
 200
 201 union all_known_options {
 202         char eol;
 203         struct option_base base;
 204         struct option_mss mss;
 205         struct option_windowscale windowscale;
 206 };
 207
 208 struct irdma_timer_entry {
 209         struct list_head list;
 210         unsigned long timetosend; /* jiffies */
 211         struct irdma_puda_buf *sqbuf;
 212         u32 type;
 213         u32 retrycount;
 214         u32 retranscount;
 215         u32 context;
 216         u32 send_retrans;
 217         int close_when_complete;
 218 };
 219
 220 /* CM context params */
 221 struct irdma_cm_tcp_context {
 222         u8 client;
 223         u32 loc_seq_num;
 224         u32 loc_ack_num;
 225         u32 rem_ack_num;
 226         u32 rcv_nxt;
 227         u32 loc_id;
 228         u32 rem_id;
 229         u32 snd_wnd;
 230         u32 max_snd_wnd;
 231         u32 rcv_wnd;
 232         u32 mss;
 233         u8 snd_wscale;
 234         u8 rcv_wscale;
 235 };
 236
 237 struct irdma_apbvt_entry {
 238         struct hlist_node hlist;
 239         u32 use_cnt;
 240         u16 port;
 241 };
 242
 243 struct irdma_cm_listener {
 244         struct list_head list;
 245         struct iw_cm_id *cm_id;
 246         struct irdma_cm_core *cm_core;
 247         struct irdma_device *iwdev;
 248         struct list_head child_listen_list;
 249         struct irdma_apbvt_entry *apbvt_entry;
 250         enum irdma_cm_listener_state listener_state;
 251         refcount_t refcnt;
 252         atomic_t pend_accepts_cnt;
 253         u32 loc_addr[4];
 254         u32 reused_node;
 255         int backlog;
 256         u16 loc_port;
 257         u16 vlan_id;
 258         u8 loc_mac[ETH_ALEN];
 259         u8 user_pri;
 260         u8 tos;
 261         bool qhash_set:1;
 262         bool ipv4:1;
 263 };
 264
 265 struct irdma_kmem_info {
 266         void *addr;
 267         u32 size;
 268 };
 269
 270 struct irdma_mpa_priv_info {
 271         const void *addr;
 272         u32 size;
 273 };
 274
 275 struct irdma_cm_node {
 276         struct irdma_qp *iwqp;
 277         struct irdma_device *iwdev;
 278         struct irdma_sc_dev *dev;
 279         struct irdma_cm_tcp_context tcp_cntxt;
 280         struct irdma_cm_core *cm_core;
 281         struct irdma_timer_entry *send_entry;
 282         struct irdma_timer_entry *close_entry;
 283         struct irdma_cm_listener *listener;
 284         struct list_head timer_entry;
 285         struct list_head reset_entry;
 286         struct list_head teardown_entry;
 287         struct irdma_apbvt_entry *apbvt_entry;
 288         struct rcu_head rcu_head;
 289         struct irdma_mpa_priv_info pdata;
 290         struct irdma_sc_ah *ah;
 291         union {
 292                 struct ietf_mpa_v1 mpa_frame;
 293                 struct ietf_mpa_v2 mpa_v2_frame;
 294         };
 295         struct irdma_kmem_info mpa_hdr;
 296         struct iw_cm_id *cm_id;
 297         struct hlist_node list;
 298         struct completion establish_comp;
 299         spinlock_t retrans_list_lock; /* protect CM node rexmit updates*/
 300         atomic_t passive_state;
 301         refcount_t refcnt;
 302         enum irdma_cm_node_state state;
 303         enum send_rdma0 send_rdma0_op;
 304         enum mpa_frame_ver mpa_frame_rev;
 305         u32 loc_addr[4], rem_addr[4];
 306         u16 loc_port, rem_port;
 307         int apbvt_set;
 308         int accept_pend;
 309         u16 vlan_id;
 310         u16 ird_size;
 311         u16 ord_size;
 312         u16 mpav2_ird_ord;
 313         u16 lsmm_size;
 314         u8 pdata_buf[IETF_MAX_PRIV_DATA_LEN];
 315         u8 loc_mac[ETH_ALEN];
 316         u8 rem_mac[ETH_ALEN];
 317         u8 user_pri;
 318         u8 tos;
 319         bool ack_rcvd:1;
 320         bool qhash_set:1;
 321         bool ipv4:1;
 322         bool snd_mark_en:1;
 323         bool rcv_mark_en:1;
 324         bool do_lpb:1;
 325         bool accelerated:1;
 326 };
 327
 328 /* Used by internal CM APIs to pass CM information*/
 329 struct irdma_cm_info {
 330         struct iw_cm_id *cm_id;
 331         u16 loc_port;
 332         u16 rem_port;
 333         u32 loc_addr[4];
 334         u32 rem_addr[4];
 335         u32 qh_qpid;
 336         u16 vlan_id;
 337         int backlog;
 338         u8 user_pri;
 339         u8 tos;
 340         bool ipv4;
 341 };
 342
 343 struct irdma_cm_event {
 344         enum irdma_cm_event_type type;
 345         struct irdma_cm_info cm_info;
 346         struct work_struct event_work;
 347         struct irdma_cm_node *cm_node;
 348 };
 349
 350 struct irdma_cm_core {
 351         struct irdma_device *iwdev;
 352         struct irdma_sc_dev *dev;
 353         struct list_head listen_list;
 354         DECLARE_HASHTABLE(cm_hash_tbl, 8);
 355         DECLARE_HASHTABLE(apbvt_hash_tbl, 8);
 356         struct timer_list tcp_timer;
 357         struct workqueue_struct *event_wq;
 358         spinlock_t ht_lock; /* protect CM node (active side) list */
 359         spinlock_t listen_list_lock; /* protect listener list */
 360         spinlock_t apbvt_lock; /*serialize apbvt add/del entries*/
 361         u64 stats_nodes_created;
 362         u64 stats_nodes_destroyed;
 363         u64 stats_listen_created;
 364         u64 stats_listen_destroyed;
 365         u64 stats_listen_nodes_created;
 366         u64 stats_listen_nodes_destroyed;
 367         u64 stats_lpbs;
 368         u64 stats_accepts;
 369         u64 stats_rejects;
 370         u64 stats_connect_errs;
 371         u64 stats_passive_errs;
 372         u64 stats_pkt_retrans;
 373         u64 stats_backlog_drops;
 374         struct irdma_puda_buf *(*form_cm_frame)(struct irdma_cm_node *cm_node,
 375                                                 struct irdma_kmem_info *options,
 376                                                 struct irdma_kmem_info *hdr,
 377                                                 struct irdma_mpa_priv_info *pdata,
 378                                                 u8 flags);
 379         int (*cm_create_ah)(struct irdma_cm_node *cm_node, bool wait);
 380         void (*cm_free_ah)(struct irdma_cm_node *cm_node);
 381 };
 382
 383 int irdma_schedule_cm_timer(struct irdma_cm_node *cm_node,
 384                             struct irdma_puda_buf *sqbuf,
 385                             enum irdma_timer_type type, int send_retrans,
 386                             int close_when_complete);
 387
 388 static inline u8 irdma_tos2dscp(u8 tos)
 389 {
 390 #define IRDMA_DSCP_VAL GENMASK(7, 2)
 391         return (u8)FIELD_GET(IRDMA_DSCP_VAL, tos);
 392 }
 393
 394 int irdma_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param);
 395 int irdma_reject(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len);
 396 int irdma_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param);
 397 int irdma_create_listen(struct iw_cm_id *cm_id, int backlog);
 398 int irdma_destroy_listen(struct iw_cm_id *cm_id);
 399 int irdma_add_arp(struct irdma_pci_f *rf, u32 *ip, bool ipv4, const u8 *mac);
 400 void irdma_cm_teardown_connections(struct irdma_device *iwdev, u32 *ipaddr,
 401                                    struct irdma_cm_info *nfo,
 402                                    bool disconnect_all);
 403 int irdma_cm_start(struct irdma_device *dev);
 404 int irdma_cm_stop(struct irdma_device *dev);
 405 bool irdma_ipv4_is_lpb(u32 loc_addr, u32 rem_addr);
 406 bool irdma_ipv6_is_lpb(u32 *loc_addr, u32 *rem_addr);
 407 int irdma_arp_table(struct irdma_pci_f *rf, u32 *ip_addr, bool ipv4,
 408                     const u8 *mac_addr, u32 action);
 409 void irdma_if_notify(struct irdma_device *iwdev, struct net_device *netdev,
 410                      u32 *ipaddr, bool ipv4, bool ifup);
 411 bool irdma_port_in_use(struct irdma_cm_core *cm_core, u16 port);
 412 void irdma_send_ack(struct irdma_cm_node *cm_node);
 413 void irdma_lpb_nop(struct irdma_sc_qp *qp);
 414 void irdma_rem_ref_cm_node(struct irdma_cm_node *cm_node);
 415 void irdma_add_conn_est_qh(struct irdma_cm_node *cm_node);
 416 #endif /* IRDMA_CM_H */