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119 lines
4.0 KiB
119 lines
4.0 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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/* |
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* Shared Memory Communications over RDMA (SMC-R) and RoCE |
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* |
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* Definitions for LLC (link layer control) message handling |
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* |
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* Copyright IBM Corp. 2016 |
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* |
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* Author(s): Klaus Wacker <[email protected]> |
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* Ursula Braun <[email protected]> |
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*/ |
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#ifndef SMC_LLC_H |
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#define SMC_LLC_H |
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#include "smc_wr.h" |
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#define SMC_LLC_FLAG_RESP 0x80 |
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#define SMC_LLC_WAIT_FIRST_TIME (5 * HZ) |
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#define SMC_LLC_WAIT_TIME (2 * HZ) |
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enum smc_llc_reqresp { |
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SMC_LLC_REQ, |
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SMC_LLC_RESP |
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}; |
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enum smc_llc_msg_type { |
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SMC_LLC_CONFIRM_LINK = 0x01, |
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SMC_LLC_ADD_LINK = 0x02, |
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SMC_LLC_ADD_LINK_CONT = 0x03, |
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SMC_LLC_DELETE_LINK = 0x04, |
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SMC_LLC_REQ_ADD_LINK = 0x05, |
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SMC_LLC_CONFIRM_RKEY = 0x06, |
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SMC_LLC_TEST_LINK = 0x07, |
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SMC_LLC_CONFIRM_RKEY_CONT = 0x08, |
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SMC_LLC_DELETE_RKEY = 0x09, |
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/* V2 types */ |
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SMC_LLC_CONFIRM_LINK_V2 = 0x21, |
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SMC_LLC_ADD_LINK_V2 = 0x22, |
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SMC_LLC_DELETE_LINK_V2 = 0x24, |
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SMC_LLC_REQ_ADD_LINK_V2 = 0x25, |
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SMC_LLC_CONFIRM_RKEY_V2 = 0x26, |
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SMC_LLC_TEST_LINK_V2 = 0x27, |
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SMC_LLC_DELETE_RKEY_V2 = 0x29, |
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}; |
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#define smc_link_downing(state) \ |
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(cmpxchg(state, SMC_LNK_ACTIVE, SMC_LNK_INACTIVE) == SMC_LNK_ACTIVE) |
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/* LLC DELETE LINK Request Reason Codes */ |
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#define SMC_LLC_DEL_LOST_PATH 0x00010000 |
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#define SMC_LLC_DEL_OP_INIT_TERM 0x00020000 |
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#define SMC_LLC_DEL_PROG_INIT_TERM 0x00030000 |
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#define SMC_LLC_DEL_PROT_VIOL 0x00040000 |
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#define SMC_LLC_DEL_NO_ASYM_NEEDED 0x00050000 |
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/* LLC DELETE LINK Response Reason Codes */ |
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#define SMC_LLC_DEL_NOLNK 0x00100000 /* Unknown Link ID (no link) */ |
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#define SMC_LLC_DEL_NOLGR 0x00200000 /* Unknown Link Group */ |
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/* returns a usable link of the link group, or NULL */ |
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static inline struct smc_link *smc_llc_usable_link(struct smc_link_group *lgr) |
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{ |
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int i; |
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for (i = 0; i < SMC_LINKS_PER_LGR_MAX; i++) |
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if (smc_link_usable(&lgr->lnk[i])) |
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return &lgr->lnk[i]; |
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return NULL; |
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} |
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/* set the termination reason code for the link group */ |
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static inline void smc_llc_set_termination_rsn(struct smc_link_group *lgr, |
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u32 rsn) |
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{ |
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if (!lgr->llc_termination_rsn) |
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lgr->llc_termination_rsn = rsn; |
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} |
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/* transmit */ |
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int smc_llc_send_confirm_link(struct smc_link *lnk, |
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enum smc_llc_reqresp reqresp); |
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int smc_llc_send_add_link(struct smc_link *link, u8 mac[], u8 gid[], |
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struct smc_link *link_new, |
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enum smc_llc_reqresp reqresp); |
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int smc_llc_send_delete_link(struct smc_link *link, u8 link_del_id, |
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enum smc_llc_reqresp reqresp, bool orderly, |
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u32 reason); |
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void smc_llc_srv_delete_link_local(struct smc_link *link, u8 del_link_id); |
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void smc_llc_lgr_init(struct smc_link_group *lgr, struct smc_sock *smc); |
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void smc_llc_lgr_clear(struct smc_link_group *lgr); |
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int smc_llc_link_init(struct smc_link *link); |
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void smc_llc_link_active(struct smc_link *link); |
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void smc_llc_link_clear(struct smc_link *link, bool log); |
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int smc_llc_do_confirm_rkey(struct smc_link *send_link, |
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struct smc_buf_desc *rmb_desc); |
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int smc_llc_do_delete_rkey(struct smc_link_group *lgr, |
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struct smc_buf_desc *rmb_desc); |
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int smc_llc_flow_initiate(struct smc_link_group *lgr, |
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enum smc_llc_flowtype type); |
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void smc_llc_flow_stop(struct smc_link_group *lgr, struct smc_llc_flow *flow); |
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int smc_llc_eval_conf_link(struct smc_llc_qentry *qentry, |
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enum smc_llc_reqresp type); |
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void smc_llc_link_set_uid(struct smc_link *link); |
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void smc_llc_save_peer_uid(struct smc_llc_qentry *qentry); |
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struct smc_llc_qentry *smc_llc_wait(struct smc_link_group *lgr, |
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struct smc_link *lnk, |
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int time_out, u8 exp_msg); |
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struct smc_llc_qentry *smc_llc_flow_qentry_clr(struct smc_llc_flow *flow); |
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void smc_llc_flow_qentry_del(struct smc_llc_flow *flow); |
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void smc_llc_send_link_delete_all(struct smc_link_group *lgr, bool ord, |
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u32 rsn); |
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int smc_llc_cli_add_link(struct smc_link *link, struct smc_llc_qentry *qentry); |
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int smc_llc_srv_add_link(struct smc_link *link, |
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struct smc_llc_qentry *req_qentry); |
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void smc_llc_add_link_local(struct smc_link *link); |
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int smc_llc_init(void) __init; |
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#endif /* SMC_LLC_H */
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