mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
synced 2025-01-07 14:32:23 +00:00
2d2209f201
First set of functions to process an ADD_LINK LLC request as an SMC server. Find an alternate IB device, determine the new link group type and get the index for the new link. Then initialize the link and send the ADD_LINK LLC message to the peer. Save the contents of the response, ready the link, map all used buffers and register the buffers with the IB device. If any error occurs, stop the processing and clear the link. And call smc_llc_srv_add_link() in af_smc.c to start second link establishment after the initial link of a link group was created. Signed-off-by: Karsten Graul <kgraul@linux.ibm.com> Reviewed-by: Ursula Braun <ubraun@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
96 lines
3.1 KiB
C
96 lines
3.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
/*
|
|
* Shared Memory Communications over RDMA (SMC-R) and RoCE
|
|
*
|
|
* Definitions for LLC (link layer control) message handling
|
|
*
|
|
* Copyright IBM Corp. 2016
|
|
*
|
|
* Author(s): Klaus Wacker <Klaus.Wacker@de.ibm.com>
|
|
* Ursula Braun <ubraun@linux.vnet.ibm.com>
|
|
*/
|
|
|
|
#ifndef SMC_LLC_H
|
|
#define SMC_LLC_H
|
|
|
|
#include "smc_wr.h"
|
|
|
|
#define SMC_LLC_FLAG_RESP 0x80
|
|
|
|
#define SMC_LLC_WAIT_FIRST_TIME (5 * HZ)
|
|
#define SMC_LLC_WAIT_TIME (2 * HZ)
|
|
|
|
enum smc_llc_reqresp {
|
|
SMC_LLC_REQ,
|
|
SMC_LLC_RESP
|
|
};
|
|
|
|
enum smc_llc_msg_type {
|
|
SMC_LLC_CONFIRM_LINK = 0x01,
|
|
SMC_LLC_ADD_LINK = 0x02,
|
|
SMC_LLC_ADD_LINK_CONT = 0x03,
|
|
SMC_LLC_DELETE_LINK = 0x04,
|
|
SMC_LLC_CONFIRM_RKEY = 0x06,
|
|
SMC_LLC_TEST_LINK = 0x07,
|
|
SMC_LLC_CONFIRM_RKEY_CONT = 0x08,
|
|
SMC_LLC_DELETE_RKEY = 0x09,
|
|
};
|
|
|
|
#define smc_link_downing(state) \
|
|
(cmpxchg(state, SMC_LNK_ACTIVE, SMC_LNK_INACTIVE) == SMC_LNK_ACTIVE)
|
|
|
|
/* LLC DELETE LINK Request Reason Codes */
|
|
#define SMC_LLC_DEL_LOST_PATH 0x00010000
|
|
#define SMC_LLC_DEL_OP_INIT_TERM 0x00020000
|
|
#define SMC_LLC_DEL_PROG_INIT_TERM 0x00030000
|
|
#define SMC_LLC_DEL_PROT_VIOL 0x00040000
|
|
#define SMC_LLC_DEL_NO_ASYM_NEEDED 0x00050000
|
|
/* LLC DELETE LINK Response Reason Codes */
|
|
#define SMC_LLC_DEL_NOLNK 0x00100000 /* Unknown Link ID (no link) */
|
|
#define SMC_LLC_DEL_NOLGR 0x00200000 /* Unknown Link Group */
|
|
|
|
/* returns a usable link of the link group, or NULL */
|
|
static inline struct smc_link *smc_llc_usable_link(struct smc_link_group *lgr)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < SMC_LINKS_PER_LGR_MAX; i++)
|
|
if (smc_link_usable(&lgr->lnk[i]))
|
|
return &lgr->lnk[i];
|
|
return NULL;
|
|
}
|
|
|
|
/* transmit */
|
|
int smc_llc_send_confirm_link(struct smc_link *lnk,
|
|
enum smc_llc_reqresp reqresp);
|
|
int smc_llc_send_add_link(struct smc_link *link, u8 mac[], u8 gid[],
|
|
struct smc_link *link_new,
|
|
enum smc_llc_reqresp reqresp);
|
|
int smc_llc_send_delete_link(struct smc_link *link, u8 link_del_id,
|
|
enum smc_llc_reqresp reqresp, bool orderly,
|
|
u32 reason);
|
|
void smc_llc_lgr_init(struct smc_link_group *lgr, struct smc_sock *smc);
|
|
void smc_llc_lgr_clear(struct smc_link_group *lgr);
|
|
int smc_llc_link_init(struct smc_link *link);
|
|
void smc_llc_link_active(struct smc_link *link);
|
|
void smc_llc_link_clear(struct smc_link *link);
|
|
int smc_llc_do_confirm_rkey(struct smc_link *send_link,
|
|
struct smc_buf_desc *rmb_desc);
|
|
int smc_llc_do_delete_rkey(struct smc_link_group *lgr,
|
|
struct smc_buf_desc *rmb_desc);
|
|
int smc_llc_flow_initiate(struct smc_link_group *lgr,
|
|
enum smc_llc_flowtype type);
|
|
void smc_llc_flow_stop(struct smc_link_group *lgr, struct smc_llc_flow *flow);
|
|
int smc_llc_eval_conf_link(struct smc_llc_qentry *qentry,
|
|
enum smc_llc_reqresp type);
|
|
struct smc_llc_qentry *smc_llc_wait(struct smc_link_group *lgr,
|
|
struct smc_link *lnk,
|
|
int time_out, u8 exp_msg);
|
|
struct smc_llc_qentry *smc_llc_flow_qentry_clr(struct smc_llc_flow *flow);
|
|
void smc_llc_flow_qentry_del(struct smc_llc_flow *flow);
|
|
int smc_llc_cli_add_link(struct smc_link *link, struct smc_llc_qentry *qentry);
|
|
int smc_llc_srv_add_link(struct smc_link *link);
|
|
int smc_llc_init(void) __init;
|
|
|
|
#endif /* SMC_LLC_H */
|