diff options
Diffstat (limited to 'net/smc/smc_ism.c')
| -rw-r--r-- | net/smc/smc_ism.c | 88 |
1 files changed, 73 insertions, 15 deletions
diff --git a/net/smc/smc_ism.c b/net/smc/smc_ism.c index ac88de2a06a0..84f98e18c7db 100644 --- a/net/smc/smc_ism.c +++ b/net/smc/smc_ism.c @@ -91,6 +91,11 @@ bool smc_ism_is_v2_capable(void) return smc_ism_v2_capable; } +void smc_ism_set_v2_capable(void) +{ + smc_ism_v2_capable = true; +} + /* Set a connection using this DMBE. */ void smc_ism_set_conn(struct smc_connection *conn) { @@ -126,6 +131,8 @@ int smc_ism_get_vlan(struct smcd_dev *smcd, unsigned short vlanid) if (!vlanid) /* No valid vlan id */ return -EINVAL; + if (!smcd->ops->add_vlan_id) + return -EOPNOTSUPP; /* create new vlan entry, in case we need it */ new_vlan = kzalloc(sizeof(*new_vlan), GFP_KERNEL); @@ -171,6 +178,8 @@ int smc_ism_put_vlan(struct smcd_dev *smcd, unsigned short vlanid) if (!vlanid) /* No valid vlan id */ return -EINVAL; + if (!smcd->ops->del_vlan_id) + return -EOPNOTSUPP; spin_lock_irqsave(&smcd->lock, flags); list_for_each_entry(vlan, &smcd->vlan, list) { @@ -222,7 +231,6 @@ int smc_ism_unregister_dmb(struct smcd_dev *smcd, struct smc_buf_desc *dmb_desc) int smc_ism_register_dmb(struct smc_link_group *lgr, int dmb_len, struct smc_buf_desc *dmb_desc) { -#if IS_ENABLED(CONFIG_ISM) struct smcd_dmb dmb; int rc; @@ -231,7 +239,7 @@ int smc_ism_register_dmb(struct smc_link_group *lgr, int dmb_len, dmb.sba_idx = dmb_desc->sba_idx; dmb.vlan_id = lgr->vlan_id; dmb.rgid = lgr->peer_gid.gid; - rc = lgr->smcd->ops->register_dmb(lgr->smcd, &dmb, &smc_ism_client); + rc = lgr->smcd->ops->register_dmb(lgr->smcd, &dmb, lgr->smcd->client); if (!rc) { dmb_desc->sba_idx = dmb.sba_idx; dmb_desc->token = dmb.dmb_tok; @@ -240,9 +248,46 @@ int smc_ism_register_dmb(struct smc_link_group *lgr, int dmb_len, dmb_desc->len = dmb.dmb_len; } return rc; -#else - return 0; -#endif +} + +bool smc_ism_support_dmb_nocopy(struct smcd_dev *smcd) +{ + /* for now only loopback-ism supports + * merging sndbuf with peer DMB to avoid + * data copies between them. + */ + return (smcd->ops->support_dmb_nocopy && + smcd->ops->support_dmb_nocopy(smcd)); +} + +int smc_ism_attach_dmb(struct smcd_dev *dev, u64 token, + struct smc_buf_desc *dmb_desc) +{ + struct smcd_dmb dmb; + int rc = 0; + + if (!dev->ops->attach_dmb) + return -EINVAL; + + memset(&dmb, 0, sizeof(dmb)); + dmb.dmb_tok = token; + rc = dev->ops->attach_dmb(dev, &dmb); + if (!rc) { + dmb_desc->sba_idx = dmb.sba_idx; + dmb_desc->token = dmb.dmb_tok; + dmb_desc->cpu_addr = dmb.cpu_addr; + dmb_desc->dma_addr = dmb.dma_addr; + dmb_desc->len = dmb.dmb_len; + } + return rc; +} + +int smc_ism_detach_dmb(struct smcd_dev *dev, u64 token) +{ + if (!dev->ops->detach_dmb) + return -EINVAL; + + return dev->ops->detach_dmb(dev, token); } static int smc_nl_handle_smcd_dev(struct smcd_dev *smcd, @@ -322,6 +367,8 @@ static void smc_nl_prep_smcd_dev(struct smcd_dev_list *dev_list, list_for_each_entry(smcd, &dev_list->list, list) { if (num < snum) goto next; + if (smc_ism_is_loopback(smcd)) + goto next; if (smc_nl_handle_smcd_dev(smcd, skb, cb)) goto errout; next: @@ -372,7 +419,8 @@ static void smcd_handle_sw_event(struct smc_ism_event_work *wrk) smc_smcd_terminate(wrk->smcd, &peer_gid, ev_info.vlan_id); break; case ISM_EVENT_CODE_TESTLINK: /* Activity timer */ - if (ev_info.code == ISM_EVENT_REQUEST) { + if (ev_info.code == ISM_EVENT_REQUEST && + wrk->smcd->ops->signal_event) { ev_info.code = ISM_EVENT_RESPONSE; wrk->smcd->ops->signal_event(wrk->smcd, &peer_gid, @@ -436,7 +484,7 @@ static struct smcd_dev *smcd_alloc_dev(struct device *parent, const char *name, static void smcd_register_dev(struct ism_dev *ism) { const struct smcd_ops *ops = ism_get_smcd_ops(); - struct smcd_dev *smcd; + struct smcd_dev *smcd, *fentry; if (!ops) return; @@ -446,20 +494,28 @@ static void smcd_register_dev(struct ism_dev *ism) if (!smcd) return; smcd->priv = ism; + smcd->client = &smc_ism_client; ism_set_priv(ism, &smc_ism_client, smcd); if (smc_pnetid_by_dev_port(&ism->pdev->dev, 0, smcd->pnetid)) smc_pnetid_by_table_smcd(smcd); + if (smcd->ops->supports_v2()) + smc_ism_set_v2_capable(); mutex_lock(&smcd_dev_list.mutex); - if (list_empty(&smcd_dev_list.list)) { - if (smcd->ops->supports_v2()) - smc_ism_v2_capable = true; - } - /* sort list: devices without pnetid before devices with pnetid */ - if (smcd->pnetid[0]) + /* sort list: + * - devices without pnetid before devices with pnetid; + * - loopback-ism always at the very beginning; + */ + if (!smcd->pnetid[0]) { + fentry = list_first_entry_or_null(&smcd_dev_list.list, + struct smcd_dev, list); + if (fentry && smc_ism_is_loopback(fentry)) + list_add(&smcd->list, &fentry->list); + else + list_add(&smcd->list, &smcd_dev_list.list); + } else { list_add_tail(&smcd->list, &smcd_dev_list.list); - else - list_add(&smcd->list, &smcd_dev_list.list); + } mutex_unlock(&smcd_dev_list.mutex); pr_warn_ratelimited("smc: adding smcd device %s with pnetid %.16s%s\n", @@ -541,6 +597,8 @@ int smc_ism_signal_shutdown(struct smc_link_group *lgr) if (lgr->peer_shutdown) return 0; + if (!lgr->smcd->ops->signal_event) + return 0; memcpy(ev_info.uid, lgr->id, SMC_LGR_ID_SIZE); ev_info.vlan_id = lgr->vlan_id; |