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-rw-r--r--drivers/infiniband/hw/irdma/cm.h416
1 files changed, 416 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/irdma/cm.h b/drivers/infiniband/hw/irdma/cm.h
new file mode 100644
index 0000000000..7feadb3e1e
--- /dev/null
+++ b/drivers/infiniband/hw/irdma/cm.h
@@ -0,0 +1,416 @@
+/* SPDX-License-Identifier: GPL-2.0 or Linux-OpenIB */
+/* Copyright (c) 2015 - 2021 Intel Corporation */
+#ifndef IRDMA_CM_H
+#define IRDMA_CM_H
+
+#define IRDMA_MPA_REQUEST_ACCEPT 1
+#define IRDMA_MPA_REQUEST_REJECT 2
+
+/* IETF MPA -- defines */
+#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_VER 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 IRDMA_MAX_IETF_SIZE 32
+
+/* 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 MAX_PORTS 65536
+
+#define IRDMA_PASSIVE_STATE_INDICATED 0
+#define IRDMA_DO_NOT_SEND_RESET_EVENT 1
+#define IRDMA_SEND_RESET_EVENT 2
+
+#define MAX_IRDMA_IFS 4
+
+#define SET_ACK 1
+#define SET_SYN 2
+#define SET_FIN 4
+#define SET_RST 8
+
+#define TCP_OPTIONS_PADDING 3
+
+#define IRDMA_DEFAULT_RETRYS 64
+#define IRDMA_DEFAULT_RETRANS 32
+#define IRDMA_DEFAULT_TTL 0x40
+#define IRDMA_DEFAULT_RTT_VAR 6
+#define IRDMA_DEFAULT_SS_THRESH 0x3fffffff
+#define IRDMA_DEFAULT_REXMIT_THRESH 8
+
+#define IRDMA_RETRY_TIMEOUT HZ
+#define IRDMA_SHORT_TIME 10
+#define IRDMA_LONG_TIME (2 * HZ)
+#define IRDMA_MAX_TIMEOUT ((unsigned long)(12 * HZ))
+
+#define IRDMA_CM_HASHTABLE_SIZE 1024
+#define IRDMA_CM_TCP_TIMER_INTERVAL 3000
+#define IRDMA_CM_DEFAULT_MTU 1540
+#define IRDMA_CM_DEFAULT_FRAME_CNT 10
+#define IRDMA_CM_THREAD_STACK_SIZE 256
+#define IRDMA_CM_DEFAULT_RCV_WND 64240
+#define IRDMA_CM_DEFAULT_RCV_WND_SCALED 0x3FFFC
+#define IRDMA_CM_DEFAULT_RCV_WND_SCALE 2
+#define IRDMA_CM_DEFAULT_FREE_PKTS 10
+#define IRDMA_CM_FREE_PKT_LO_WATERMARK 2
+#define IRDMA_CM_DEFAULT_MSS 536
+#define IRDMA_CM_DEFAULT_MPA_VER 2
+#define IRDMA_CM_DEFAULT_SEQ 0x159bf75f
+#define IRDMA_CM_DEFAULT_LOCAL_ID 0x3b47
+#define IRDMA_CM_DEFAULT_SEQ2 0x18ed5740
+#define IRDMA_CM_DEFAULT_LOCAL_ID2 0xb807
+#define IRDMA_MAX_CM_BUF (IRDMA_MAX_IETF_SIZE + IETF_MAX_PRIV_DATA_LEN)
+
+enum ietf_mpa_flags {
+ IETF_MPA_FLAGS_REJECT = 0x20,
+ IETF_MPA_FLAGS_CRC = 0x40,
+ IETF_MPA_FLAGS_MARKERS = 0x80,
+};
+
+enum irdma_timer_type {
+ IRDMA_TIMER_TYPE_SEND,
+ IRDMA_TIMER_TYPE_CLOSE,
+};
+
+enum option_nums {
+ OPTION_NUM_EOL,
+ OPTION_NUM_NONE,
+ OPTION_NUM_MSS,
+ OPTION_NUM_WINDOW_SCALE,
+ OPTION_NUM_SACK_PERM,
+ OPTION_NUM_SACK,
+ OPTION_NUM_WRITE0 = 0xbc,
+};
+
+/* cm node transition states */
+enum irdma_cm_node_state {
+ IRDMA_CM_STATE_UNKNOWN,
+ IRDMA_CM_STATE_INITED,
+ IRDMA_CM_STATE_LISTENING,
+ IRDMA_CM_STATE_SYN_RCVD,
+ IRDMA_CM_STATE_SYN_SENT,
+ IRDMA_CM_STATE_ONE_SIDE_ESTABLISHED,
+ IRDMA_CM_STATE_ESTABLISHED,
+ IRDMA_CM_STATE_ACCEPTING,
+ IRDMA_CM_STATE_MPAREQ_SENT,
+ IRDMA_CM_STATE_MPAREQ_RCVD,
+ IRDMA_CM_STATE_MPAREJ_RCVD,
+ IRDMA_CM_STATE_OFFLOADED,
+ IRDMA_CM_STATE_FIN_WAIT1,
+ IRDMA_CM_STATE_FIN_WAIT2,
+ IRDMA_CM_STATE_CLOSE_WAIT,
+ IRDMA_CM_STATE_TIME_WAIT,
+ IRDMA_CM_STATE_LAST_ACK,
+ IRDMA_CM_STATE_CLOSING,
+ IRDMA_CM_STATE_LISTENER_DESTROYED,
+ IRDMA_CM_STATE_CLOSED,
+};
+
+enum mpa_frame_ver {
+ 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 irdma_tcpip_pkt_type {
+ IRDMA_PKT_TYPE_UNKNOWN,
+ IRDMA_PKT_TYPE_SYN,
+ IRDMA_PKT_TYPE_SYNACK,
+ IRDMA_PKT_TYPE_ACK,
+ IRDMA_PKT_TYPE_FIN,
+ IRDMA_PKT_TYPE_RST,
+};
+
+enum irdma_cm_listener_state {
+ IRDMA_CM_LISTENER_PASSIVE_STATE = 1,
+ IRDMA_CM_LISTENER_ACTIVE_STATE = 2,
+ IRDMA_CM_LISTENER_EITHER_STATE = 3,
+};
+
+/* CM event codes */
+enum irdma_cm_event_type {
+ IRDMA_CM_EVENT_UNKNOWN,
+ IRDMA_CM_EVENT_ESTABLISHED,
+ IRDMA_CM_EVENT_MPA_REQ,
+ IRDMA_CM_EVENT_MPA_CONNECT,
+ IRDMA_CM_EVENT_MPA_ACCEPT,
+ IRDMA_CM_EVENT_MPA_REJECT,
+ IRDMA_CM_EVENT_MPA_ESTABLISHED,
+ IRDMA_CM_EVENT_CONNECTED,
+ IRDMA_CM_EVENT_RESET,
+ IRDMA_CM_EVENT_ABORTED,
+};
+
+struct ietf_mpa_v1 {
+ u8 key[IETF_MPA_KEY_SIZE];
+ u8 flags;
+ u8 rev;
+ __be16 priv_data_len;
+ u8 priv_data[];
+};
+
+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[];
+};
+
+struct option_base {
+ u8 optionnum;
+ u8 len;
+};
+
+struct option_mss {
+ u8 optionnum;
+ u8 len;
+ __be16 mss;
+};
+
+struct option_windowscale {
+ u8 optionnum;
+ u8 len;
+ u8 shiftcount;
+};
+
+union all_known_options {
+ char eol;
+ struct option_base base;
+ struct option_mss mss;
+ struct option_windowscale windowscale;
+};
+
+struct irdma_timer_entry {
+ struct list_head list;
+ unsigned long timetosend; /* jiffies */
+ struct irdma_puda_buf *sqbuf;
+ u32 type;
+ u32 retrycount;
+ u32 retranscount;
+ u32 context;
+ u32 send_retrans;
+ int close_when_complete;
+};
+
+/* CM context params */
+struct irdma_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 irdma_apbvt_entry {
+ struct hlist_node hlist;
+ u32 use_cnt;
+ u16 port;
+};
+
+struct irdma_cm_listener {
+ struct list_head list;
+ struct iw_cm_id *cm_id;
+ struct irdma_cm_core *cm_core;
+ struct irdma_device *iwdev;
+ struct list_head child_listen_list;
+ struct irdma_apbvt_entry *apbvt_entry;
+ enum irdma_cm_listener_state listener_state;
+ refcount_t refcnt;
+ atomic_t pend_accepts_cnt;
+ u32 loc_addr[4];
+ u32 reused_node;
+ int backlog;
+ u16 loc_port;
+ u16 vlan_id;
+ u8 loc_mac[ETH_ALEN];
+ u8 user_pri;
+ u8 tos;
+ bool qhash_set:1;
+ bool ipv4:1;
+};
+
+struct irdma_kmem_info {
+ void *addr;
+ u32 size;
+};
+
+struct irdma_mpa_priv_info {
+ const void *addr;
+ u32 size;
+};
+
+struct irdma_cm_node {
+ struct irdma_qp *iwqp;
+ struct irdma_device *iwdev;
+ struct irdma_sc_dev *dev;
+ struct irdma_cm_tcp_context tcp_cntxt;
+ struct irdma_cm_core *cm_core;
+ struct irdma_timer_entry *send_entry;
+ struct irdma_timer_entry *close_entry;
+ struct irdma_cm_listener *listener;
+ struct list_head timer_entry;
+ struct list_head reset_entry;
+ struct list_head teardown_entry;
+ struct irdma_apbvt_entry *apbvt_entry;
+ struct rcu_head rcu_head;
+ struct irdma_mpa_priv_info pdata;
+ struct irdma_sc_ah *ah;
+ union {
+ struct ietf_mpa_v1 mpa_frame;
+ struct ietf_mpa_v2 mpa_v2_frame;
+ };
+ struct irdma_kmem_info mpa_hdr;
+ struct iw_cm_id *cm_id;
+ struct hlist_node list;
+ struct completion establish_comp;
+ spinlock_t retrans_list_lock; /* protect CM node rexmit updates*/
+ atomic_t passive_state;
+ refcount_t refcnt;
+ enum irdma_cm_node_state state;
+ enum send_rdma0 send_rdma0_op;
+ enum mpa_frame_ver mpa_frame_rev;
+ u32 loc_addr[4], rem_addr[4];
+ u16 loc_port, rem_port;
+ int apbvt_set;
+ int accept_pend;
+ u16 vlan_id;
+ u16 ird_size;
+ u16 ord_size;
+ u16 mpav2_ird_ord;
+ u16 lsmm_size;
+ u8 pdata_buf[IETF_MAX_PRIV_DATA_LEN];
+ u8 loc_mac[ETH_ALEN];
+ u8 rem_mac[ETH_ALEN];
+ u8 user_pri;
+ u8 tos;
+ bool ack_rcvd:1;
+ bool qhash_set:1;
+ bool ipv4:1;
+ bool snd_mark_en:1;
+ bool rcv_mark_en:1;
+ bool do_lpb:1;
+ bool accelerated:1;
+};
+
+/* Used by internal CM APIs to pass CM information*/
+struct irdma_cm_info {
+ struct iw_cm_id *cm_id;
+ u16 loc_port;
+ u16 rem_port;
+ u32 loc_addr[4];
+ u32 rem_addr[4];
+ u32 qh_qpid;
+ u16 vlan_id;
+ int backlog;
+ u8 user_pri;
+ u8 tos;
+ bool ipv4;
+};
+
+struct irdma_cm_event {
+ enum irdma_cm_event_type type;
+ struct irdma_cm_info cm_info;
+ struct work_struct event_work;
+ struct irdma_cm_node *cm_node;
+};
+
+struct irdma_cm_core {
+ struct irdma_device *iwdev;
+ struct irdma_sc_dev *dev;
+ struct list_head listen_list;
+ DECLARE_HASHTABLE(cm_hash_tbl, 8);
+ DECLARE_HASHTABLE(apbvt_hash_tbl, 8);
+ struct timer_list tcp_timer;
+ struct workqueue_struct *event_wq;
+ spinlock_t ht_lock; /* protect CM node (active side) list */
+ spinlock_t listen_list_lock; /* protect listener list */
+ spinlock_t apbvt_lock; /*serialize apbvt add/del entries*/
+ 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_lpbs;
+ u64 stats_accepts;
+ u64 stats_rejects;
+ u64 stats_connect_errs;
+ u64 stats_passive_errs;
+ u64 stats_pkt_retrans;
+ u64 stats_backlog_drops;
+ struct irdma_puda_buf *(*form_cm_frame)(struct irdma_cm_node *cm_node,
+ struct irdma_kmem_info *options,
+ struct irdma_kmem_info *hdr,
+ struct irdma_mpa_priv_info *pdata,
+ u8 flags);
+ int (*cm_create_ah)(struct irdma_cm_node *cm_node, bool wait);
+ void (*cm_free_ah)(struct irdma_cm_node *cm_node);
+};
+
+int irdma_schedule_cm_timer(struct irdma_cm_node *cm_node,
+ struct irdma_puda_buf *sqbuf,
+ enum irdma_timer_type type, int send_retrans,
+ int close_when_complete);
+
+static inline u8 irdma_tos2dscp(u8 tos)
+{
+#define IRDMA_DSCP_VAL GENMASK(7, 2)
+ return (u8)FIELD_GET(IRDMA_DSCP_VAL, tos);
+}
+
+int irdma_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param);
+int irdma_reject(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len);
+int irdma_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param);
+int irdma_create_listen(struct iw_cm_id *cm_id, int backlog);
+int irdma_destroy_listen(struct iw_cm_id *cm_id);
+int irdma_add_arp(struct irdma_pci_f *rf, u32 *ip, bool ipv4, const u8 *mac);
+void irdma_cm_teardown_connections(struct irdma_device *iwdev, u32 *ipaddr,
+ struct irdma_cm_info *nfo,
+ bool disconnect_all);
+int irdma_cm_start(struct irdma_device *dev);
+int irdma_cm_stop(struct irdma_device *dev);
+bool irdma_ipv4_is_lpb(u32 loc_addr, u32 rem_addr);
+bool irdma_ipv6_is_lpb(u32 *loc_addr, u32 *rem_addr);
+int irdma_arp_table(struct irdma_pci_f *rf, u32 *ip_addr, bool ipv4,
+ const u8 *mac_addr, u32 action);
+void irdma_if_notify(struct irdma_device *iwdev, struct net_device *netdev,
+ u32 *ipaddr, bool ipv4, bool ifup);
+bool irdma_port_in_use(struct irdma_cm_core *cm_core, u16 port);
+void irdma_send_ack(struct irdma_cm_node *cm_node);
+void irdma_lpb_nop(struct irdma_sc_qp *qp);
+void irdma_rem_ref_cm_node(struct irdma_cm_node *cm_node);
+void irdma_add_conn_est_qh(struct irdma_cm_node *cm_node);
+#endif /* IRDMA_CM_H */