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net/smc: adapt SMC remote CONFIRM_RKEY processing to use the LLC flow 

Use the LLC flow framework for the processing of CONFIRM_RKEY messages
that were received from the peer.

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>
This commit is contained in:
Karsten Graul 2020-04-30 15:55:48 +02:00 committed by David S. Miller
parent ba21abd22f
commit 3bc67e098c
1 changed files with 38 additions and 12 deletions
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50
net/smc/smc_llc.c
View File

@ -105,6 +105,7 @@ struct smc_llc_msg_confirm_rkey_cont { /* type 0x08 */
};
#define SMC_LLC_DEL_RKEY_MAX 8
#define SMC_LLC_FLAG_RKEY_RETRY 0x10
#define SMC_LLC_FLAG_RKEY_NEG 0x20
struct smc_llc_msg_delete_rkey { /* type 0x09 */
@ -563,21 +564,41 @@ static void smc_llc_rx_delete_link(struct smc_link *link,
smc_lgr_terminate_sched(lgr);
}
static void smc_llc_rx_confirm_rkey(struct smc_link *link,
struct smc_llc_msg_confirm_rkey *llc)
/* process a confirm_rkey request from peer, remote flow */
static void smc_llc_rmt_conf_rkey(struct smc_link_group *lgr)
{
int rc;
struct smc_llc_msg_confirm_rkey *llc;
struct smc_llc_qentry *qentry;
struct smc_link *link;
int num_entries;
int rk_idx;
int i;
rc = smc_rtoken_add(link,
llc->rtoken[0].rmb_vaddr,
llc->rtoken[0].rmb_key);
qentry = lgr->llc_flow_rmt.qentry;
llc = &qentry->msg.confirm_rkey;
link = qentry->link;
/* ignore rtokens for other links, we have only one link */
num_entries = llc->rtoken[0].num_rkeys;
/* first rkey entry is for receiving link */
rk_idx = smc_rtoken_add(link,
llc->rtoken[0].rmb_vaddr,
llc->rtoken[0].rmb_key);
if (rk_idx < 0)
goto out_err;
for (i = 1; i <= min_t(u8, num_entries, SMC_LLC_RKEYS_PER_MSG - 1); i++)
smc_rtoken_set2(lgr, rk_idx, llc->rtoken[i].link_id,
llc->rtoken[i].rmb_vaddr,
llc->rtoken[i].rmb_key);
/* max links is 3 so there is no need to support conf_rkey_cont msgs */
goto out;
out_err:
llc->hd.flags |= SMC_LLC_FLAG_RKEY_NEG;
llc->hd.flags |= SMC_LLC_FLAG_RKEY_RETRY;
out:
llc->hd.flags |= SMC_LLC_FLAG_RESP;
if (rc < 0)
llc->hd.flags |= SMC_LLC_FLAG_RKEY_NEG;
smc_llc_send_message(link, llc);
smc_llc_send_message(link, &qentry->msg);
smc_llc_flow_qentry_del(&lgr->llc_flow_rmt);
}
static void smc_llc_rx_confirm_rkey_cont(struct smc_link *link,
@ -666,8 +687,13 @@ static void smc_llc_event_handler(struct smc_llc_qentry *qentry)
smc_llc_rx_delete_link(link, &llc->delete_link);
break;
case SMC_LLC_CONFIRM_RKEY:
smc_llc_rx_confirm_rkey(link, &llc->confirm_rkey);
break;
/* new request from remote, assign to remote flow */
if (smc_llc_flow_start(&lgr->llc_flow_rmt, qentry)) {
/* process here, does not wait for more llc msgs */
smc_llc_rmt_conf_rkey(lgr);
smc_llc_flow_stop(lgr, &lgr->llc_flow_rmt);
}
return;
case SMC_LLC_CONFIRM_RKEY_CONT:
smc_llc_rx_confirm_rkey_cont(link, &llc->confirm_rkey_cont);
break;