diff options
| author | Karsten Graul <kgraul@linux.ibm.com> | 2020-04-30 16:55:48 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2020-04-30 22:44:34 +0300 |
| commit | 3bc67e098c3e215f6e09ba3c0e1f569e7ae020d0 (patch) | |
| tree | 208a8f1fb8abd074798bf179e81453c9cc8d83e2 /net/smc/smc_llc.c | |
| parent | ba21abd22f9ffa023921923a6c01d28b59731ff8 (diff) | |
| download | linux-3bc67e098c3e215f6e09ba3c0e1f569e7ae020d0.tar.xz | |
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>
Diffstat (limited to 'net/smc/smc_llc.c')
| -rw-r--r-- | net/smc/smc_llc.c | 56 |
1 files changed, 41 insertions, 15 deletions
diff --git a/net/smc/smc_llc.c b/net/smc/smc_llc.c index 4945abbad111..b7b5cc01b78e 100644 --- a/net/smc/smc_llc.c +++ b/net/smc/smc_llc.c @@ -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; - - rc = smc_rtoken_add(link, - llc->rtoken[0].rmb_vaddr, - llc->rtoken[0].rmb_key); - - /* ignore rtokens for other links, we have only one link */ - + struct smc_llc_msg_confirm_rkey *llc; + struct smc_llc_qentry *qentry; + struct smc_link *link; + int num_entries; + int rk_idx; + int i; + + qentry = lgr->llc_flow_rmt.qentry; + llc = &qentry->msg.confirm_rkey; + link = qentry->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; |