/* * Copyright IBM Corp. 2007, 2009 * Author(s): Utz Bacher , * Frank Pavlic , * Thomas Spatzier , * Frank Blaschka */ #define KMSG_COMPONENT "qeth" #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt #include #include #include #include #include #include #include #include #include #include #include #include #include #include "qeth_core.h" #include "qeth_l2.h" static int qeth_l2_set_offline(struct ccwgroup_device *); static int qeth_l2_stop(struct net_device *); static void qeth_l2_set_rx_mode(struct net_device *); static void qeth_bridgeport_query_support(struct qeth_card *card); static void qeth_bridge_state_change(struct qeth_card *card, struct qeth_ipa_cmd *cmd); static void qeth_bridge_host_event(struct qeth_card *card, struct qeth_ipa_cmd *cmd); static int qeth_l2_verify_dev(struct net_device *dev) { struct qeth_card *card; unsigned long flags; int rc = 0; read_lock_irqsave(&qeth_core_card_list.rwlock, flags); list_for_each_entry(card, &qeth_core_card_list.list, list) { if (card->dev == dev) { rc = QETH_REAL_CARD; break; } } read_unlock_irqrestore(&qeth_core_card_list.rwlock, flags); return rc; } static struct net_device *qeth_l2_netdev_by_devno(unsigned char *read_dev_no) { struct qeth_card *card; struct net_device *ndev; __u16 temp_dev_no; unsigned long flags; struct ccw_dev_id read_devid; ndev = NULL; memcpy(&temp_dev_no, read_dev_no, 2); read_lock_irqsave(&qeth_core_card_list.rwlock, flags); list_for_each_entry(card, &qeth_core_card_list.list, list) { ccw_device_get_id(CARD_RDEV(card), &read_devid); if (read_devid.devno == temp_dev_no) { ndev = card->dev; break; } } read_unlock_irqrestore(&qeth_core_card_list.rwlock, flags); return ndev; } static int qeth_setdel_makerc(struct qeth_card *card, int retcode) { int rc; if (retcode) QETH_CARD_TEXT_(card, 2, "err%04x", retcode); switch (retcode) { case IPA_RC_SUCCESS: rc = 0; break; case IPA_RC_L2_UNSUPPORTED_CMD: rc = -EOPNOTSUPP; break; case IPA_RC_L2_ADDR_TABLE_FULL: rc = -ENOSPC; break; case IPA_RC_L2_DUP_MAC: case IPA_RC_L2_DUP_LAYER3_MAC: rc = -EEXIST; break; case IPA_RC_L2_MAC_NOT_AUTH_BY_HYP: case IPA_RC_L2_MAC_NOT_AUTH_BY_ADP: rc = -EPERM; break; case IPA_RC_L2_MAC_NOT_FOUND: rc = -ENOENT; break; case -ENOMEM: rc = -ENOMEM; break; default: rc = -EIO; break; } return rc; } static int qeth_l2_send_setdelmac(struct qeth_card *card, __u8 *mac, enum qeth_ipa_cmds ipacmd) { struct qeth_ipa_cmd *cmd; struct qeth_cmd_buffer *iob; QETH_CARD_TEXT(card, 2, "L2sdmac"); iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4); if (!iob) return -ENOMEM; cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE); cmd->data.setdelmac.mac_length = OSA_ADDR_LEN; memcpy(&cmd->data.setdelmac.mac, mac, OSA_ADDR_LEN); return qeth_setdel_makerc(card, qeth_send_ipa_cmd(card, iob, NULL, NULL)); } static int qeth_l2_send_setmac(struct qeth_card *card, __u8 *mac) { int rc; QETH_CARD_TEXT(card, 2, "L2Setmac"); rc = qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETVMAC); if (rc == 0) { card->info.mac_bits |= QETH_LAYER2_MAC_REGISTERED; memcpy(card->dev->dev_addr, mac, OSA_ADDR_LEN); dev_info(&card->gdev->dev, "MAC address %pM successfully registered on device %s\n", card->dev->dev_addr, card->dev->name); } else { card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED; switch (rc) { case -EEXIST: dev_warn(&card->gdev->dev, "MAC address %pM already exists\n", mac); break; case -EPERM: dev_warn(&card->gdev->dev, "MAC address %pM is not authorized\n", mac); break; } } return rc; } static int qeth_l2_send_delmac(struct qeth_card *card, __u8 *mac) { int rc; QETH_CARD_TEXT(card, 2, "L2Delmac"); if (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED)) return 0; rc = qeth_l2_send_setdelmac(card, mac, IPA_CMD_DELVMAC); if (rc == 0) card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED; return rc; } static int qeth_l2_send_setgroupmac(struct qeth_card *card, __u8 *mac) { int rc; QETH_CARD_TEXT(card, 2, "L2Sgmac"); rc = qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETGMAC); if (rc == -EEXIST) QETH_DBF_MESSAGE(2, "Group MAC %pM already existing on %s\n", mac, QETH_CARD_IFNAME(card)); else if (rc) QETH_DBF_MESSAGE(2, "Could not set group MAC %pM on %s: %d\n", mac, QETH_CARD_IFNAME(card), rc); return rc; } static int qeth_l2_send_delgroupmac(struct qeth_card *card, __u8 *mac) { int rc; QETH_CARD_TEXT(card, 2, "L2Dgmac"); rc = qeth_l2_send_setdelmac(card, mac, IPA_CMD_DELGMAC); if (rc) QETH_DBF_MESSAGE(2, "Could not delete group MAC %pM on %s: %d\n", mac, QETH_CARD_IFNAME(card), rc); return rc; } static int qeth_l2_write_mac(struct qeth_card *card, struct qeth_mac *mac) { if (mac->is_uc) { return qeth_l2_send_setdelmac(card, mac->mac_addr, IPA_CMD_SETVMAC); } else { return qeth_l2_send_setgroupmac(card, mac->mac_addr); } } static int qeth_l2_remove_mac(struct qeth_card *card, struct qeth_mac *mac) { if (mac->is_uc) { return qeth_l2_send_setdelmac(card, mac->mac_addr, IPA_CMD_DELVMAC); } else { return qeth_l2_send_delgroupmac(card, mac->mac_addr); } } static void qeth_l2_del_all_macs(struct qeth_card *card) { struct qeth_mac *mac; struct hlist_node *tmp; int i; spin_lock_bh(&card->mclock); hash_for_each_safe(card->mac_htable, i, tmp, mac, hnode) { hash_del(&mac->hnode); kfree(mac); } spin_unlock_bh(&card->mclock); } static int qeth_l2_get_cast_type(struct qeth_card *card, struct sk_buff *skb) { if (card->info.type == QETH_CARD_TYPE_OSN) return RTN_UNSPEC; if (is_broadcast_ether_addr(skb->data)) return RTN_BROADCAST; if (is_multicast_ether_addr(skb->data)) return RTN_MULTICAST; return RTN_UNSPEC; } static void qeth_l2_hdr_csum(struct qeth_card *card, struct qeth_hdr *hdr, struct sk_buff *skb) { struct iphdr *iph = ip_hdr(skb); /* tcph->check contains already the pseudo hdr checksum * so just set the header flags */ if (iph->protocol == IPPROTO_UDP) hdr->hdr.l2.flags[1] |= QETH_HDR_EXT_UDP; hdr->hdr.l2.flags[1] |= QETH_HDR_EXT_CSUM_TRANSP_REQ | QETH_HDR_EXT_CSUM_HDR_REQ; iph->check = 0; if (card->options.performance_stats) card->perf_stats.tx_csum++; } static void qeth_l2_fill_header(struct qeth_hdr *hdr, struct sk_buff *skb, int cast_type, unsigned int data_len) { struct vlan_ethhdr *veth = (struct vlan_ethhdr *)skb_mac_header(skb); memset(hdr, 0, sizeof(struct qeth_hdr)); hdr->hdr.l2.id = QETH_HEADER_TYPE_LAYER2; hdr->hdr.l2.pkt_length = data_len; /* set byte byte 3 to casting flags */ if (cast_type == RTN_MULTICAST) hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_MULTICAST; else if (cast_type == RTN_BROADCAST) hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_BROADCAST; else hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_UNICAST; /* VSWITCH relies on the VLAN * information to be present in * the QDIO header */ if (veth->h_vlan_proto == __constant_htons(ETH_P_8021Q)) { hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_VLAN; hdr->hdr.l2.vlan_id = ntohs(veth->h_vlan_TCI); } } static int qeth_l2_send_setdelvlan_cb(struct qeth_card *card, struct qeth_reply *reply, unsigned long data) { struct qeth_ipa_cmd *cmd; QETH_CARD_TEXT(card, 2, "L2sdvcb"); cmd = (struct qeth_ipa_cmd *) data; if (cmd->hdr.return_code) { QETH_DBF_MESSAGE(2, "Error in processing VLAN %i on %s: 0x%x. " "Continuing\n", cmd->data.setdelvlan.vlan_id, QETH_CARD_IFNAME(card), cmd->hdr.return_code); QETH_CARD_TEXT_(card, 2, "L2VL%4x", cmd->hdr.command); QETH_CARD_TEXT_(card, 2, "err%d", cmd->hdr.return_code); } return 0; } static int qeth_l2_send_setdelvlan(struct qeth_card *card, __u16 i, enum qeth_ipa_cmds ipacmd) { struct qeth_ipa_cmd *cmd; struct qeth_cmd_buffer *iob; QETH_CARD_TEXT_(card, 4, "L2sdv%x", ipacmd); iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4); if (!iob) return -ENOMEM; cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE); cmd->data.setdelvlan.vlan_id = i; return qeth_send_ipa_cmd(card, iob, qeth_l2_send_setdelvlan_cb, NULL); } static void qeth_l2_process_vlans(struct qeth_card *card) { struct qeth_vlan_vid *id; QETH_CARD_TEXT(card, 3, "L2prcvln"); spin_lock_bh(&card->vlanlock); list_for_each_entry(id, &card->vid_list, list) { qeth_l2_send_setdelvlan(card, id->vid, IPA_CMD_SETVLAN); } spin_unlock_bh(&card->vlanlock); } static int qeth_l2_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid) { struct qeth_card *card = dev->ml_priv; struct qeth_vlan_vid *id; int rc; QETH_CARD_TEXT_(card, 4, "aid:%d", vid); if (!vid) return 0; if (card->info.type == QETH_CARD_TYPE_OSM) { QETH_CARD_TEXT(card, 3, "aidOSM"); return 0; } if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) { QETH_CARD_TEXT(card, 3, "aidREC"); return 0; } id = kmalloc(sizeof(struct qeth_vlan_vid), GFP_ATOMIC); if (id) { id->vid = vid; rc = qeth_l2_send_setdelvlan(card, vid, IPA_CMD_SETVLAN); if (rc) { kfree(id); return rc; } spin_lock_bh(&card->vlanlock); list_add_tail(&id->list, &card->vid_list); spin_unlock_bh(&card->vlanlock); } else { return -ENOMEM; } return 0; } static int qeth_l2_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid) { struct qeth_vlan_vid *id, *tmpid = NULL; struct qeth_card *card = dev->ml_priv; int rc = 0; QETH_CARD_TEXT_(card, 4, "kid:%d", vid); if (card->info.type == QETH_CARD_TYPE_OSM) { QETH_CARD_TEXT(card, 3, "kidOSM"); return 0; } if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) { QETH_CARD_TEXT(card, 3, "kidREC"); return 0; } spin_lock_bh(&card->vlanlock); list_for_each_entry(id, &card->vid_list, list) { if (id->vid == vid) { list_del(&id->list); tmpid = id; break; } } spin_unlock_bh(&card->vlanlock); if (tmpid) { rc = qeth_l2_send_setdelvlan(card, vid, IPA_CMD_DELVLAN); kfree(tmpid); } qeth_l2_set_rx_mode(card->dev); return rc; } static void qeth_l2_stop_card(struct qeth_card *card, int recovery_mode) { QETH_DBF_TEXT(SETUP , 2, "stopcard"); QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *)); qeth_set_allowed_threads(card, 0, 1); if (card->read.state == CH_STATE_UP && card->write.state == CH_STATE_UP && (card->state == CARD_STATE_UP)) { if (recovery_mode && card->info.type != QETH_CARD_TYPE_OSN) { qeth_l2_stop(card->dev); } else { rtnl_lock(); dev_close(card->dev); rtnl_unlock(); } card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED; card->state = CARD_STATE_SOFTSETUP; } if (card->state == CARD_STATE_SOFTSETUP) { qeth_l2_del_all_macs(card); qeth_clear_ipacmd_list(card); card->state = CARD_STATE_HARDSETUP; } if (card->state == CARD_STATE_HARDSETUP) { qeth_qdio_clear_card(card, 0); qeth_clear_qdio_buffers(card); qeth_clear_working_pool_list(card); card->state = CARD_STATE_DOWN; } if (card->state == CARD_STATE_DOWN) { qeth_clear_cmd_buffers(&card->read); qeth_clear_cmd_buffers(&card->write); } } static int qeth_l2_process_inbound_buffer(struct qeth_card *card, int budget, int *done) { int work_done = 0; struct sk_buff *skb; struct qeth_hdr *hdr; unsigned int len; *done = 0; WARN_ON_ONCE(!budget); while (budget) { skb = qeth_core_get_next_skb(card, &card->qdio.in_q->bufs[card->rx.b_index], &card->rx.b_element, &card->rx.e_offset, &hdr); if (!skb) { *done = 1; break; } skb->dev = card->dev; switch (hdr->hdr.l2.id) { case QETH_HEADER_TYPE_LAYER2: skb->pkt_type = PACKET_HOST; skb->protocol = eth_type_trans(skb, skb->dev); if ((card->dev->features & NETIF_F_RXCSUM) && ((hdr->hdr.l2.flags[1] & (QETH_HDR_EXT_CSUM_HDR_REQ | QETH_HDR_EXT_CSUM_TRANSP_REQ)) == (QETH_HDR_EXT_CSUM_HDR_REQ | QETH_HDR_EXT_CSUM_TRANSP_REQ))) skb->ip_summed = CHECKSUM_UNNECESSARY; else skb->ip_summed = CHECKSUM_NONE; if (skb->protocol == htons(ETH_P_802_2)) *((__u32 *)skb->cb) = ++card->seqno.pkt_seqno; len = skb->len; napi_gro_receive(&card->napi, skb); break; case QETH_HEADER_TYPE_OSN: if (card->info.type == QETH_CARD_TYPE_OSN) { skb_push(skb, sizeof(struct qeth_hdr)); skb_copy_to_linear_data(skb, hdr, sizeof(struct qeth_hdr)); len = skb->len; card->osn_info.data_cb(skb); break; } /* else unknown */ default: dev_kfree_skb_any(skb); QETH_CARD_TEXT(card, 3, "inbunkno"); QETH_DBF_HEX(CTRL, 3, hdr, sizeof(*hdr)); continue; } work_done++; budget--; card->stats.rx_packets++; card->stats.rx_bytes += len; } return work_done; } static int qeth_l2_request_initial_mac(struct qeth_card *card) { int rc = 0; char vendor_pre[] = {0x02, 0x00, 0x00}; QETH_DBF_TEXT(SETUP, 2, "l2reqmac"); QETH_DBF_TEXT_(SETUP, 2, "doL2%s", CARD_BUS_ID(card)); if (MACHINE_IS_VM) { rc = qeth_vm_request_mac(card); if (!rc) goto out; QETH_DBF_MESSAGE(2, "z/VM MAC Service failed on device %s: x%x\n", CARD_BUS_ID(card), rc); QETH_DBF_TEXT_(SETUP, 2, "err%04x", rc); /* fall back to alternative mechanism: */ } if (card->info.type == QETH_CARD_TYPE_IQD || card->info.type == QETH_CARD_TYPE_OSM || card->info.type == QETH_CARD_TYPE_OSX || card->info.guestlan) { rc = qeth_setadpparms_change_macaddr(card); if (rc) { QETH_DBF_MESSAGE(2, "couldn't get MAC address on " "device %s: x%x\n", CARD_BUS_ID(card), rc); QETH_DBF_TEXT_(SETUP, 2, "1err%04x", rc); return rc; } } else { eth_random_addr(card->dev->dev_addr); memcpy(card->dev->dev_addr, vendor_pre, 3); } out: QETH_DBF_HEX(SETUP, 2, card->dev->dev_addr, card->dev->addr_len); return 0; } static int qeth_l2_set_mac_address(struct net_device *dev, void *p) { struct sockaddr *addr = p; struct qeth_card *card = dev->ml_priv; int rc = 0; QETH_CARD_TEXT(card, 3, "setmac"); if (qeth_l2_verify_dev(dev) != QETH_REAL_CARD) { QETH_CARD_TEXT(card, 3, "setmcINV"); return -EOPNOTSUPP; } if (card->info.type == QETH_CARD_TYPE_OSN || card->info.type == QETH_CARD_TYPE_OSM || card->info.type == QETH_CARD_TYPE_OSX) { QETH_CARD_TEXT(card, 3, "setmcTYP"); return -EOPNOTSUPP; } QETH_CARD_HEX(card, 3, addr->sa_data, OSA_ADDR_LEN); if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) { QETH_CARD_TEXT(card, 3, "setmcREC"); return -ERESTARTSYS; } rc = qeth_l2_send_delmac(card, &card->dev->dev_addr[0]); if (!rc || (rc == -ENOENT)) rc = qeth_l2_send_setmac(card, addr->sa_data); return rc ? -EINVAL : 0; } static void qeth_promisc_to_bridge(struct qeth_card *card) { struct net_device *dev = card->dev; enum qeth_ipa_promisc_modes promisc_mode; int role; int rc; QETH_CARD_TEXT(card, 3, "pmisc2br"); if (!card->options.sbp.reflect_promisc) return; promisc_mode = (dev->flags & IFF_PROMISC) ? SET_PROMISC_MODE_ON : SET_PROMISC_MODE_OFF; if (promisc_mode == card->info.promisc_mode) return; if (promisc_mode == SET_PROMISC_MODE_ON) { if (card->options.sbp.reflect_promisc_primary) role = QETH_SBP_ROLE_PRIMARY; else role = QETH_SBP_ROLE_SECONDARY; } else role = QETH_SBP_ROLE_NONE; rc = qeth_bridgeport_setrole(card, role); QETH_DBF_TEXT_(SETUP, 2, "bpm%c%04x", (promisc_mode == SET_PROMISC_MODE_ON) ? '+' : '-', rc); if (!rc) { card->options.sbp.role = role; card->info.promisc_mode = promisc_mode; } } /* New MAC address is added to the hash table and marked to be written on card * only if there is not in the hash table storage already * */ static void qeth_l2_add_mac(struct qeth_card *card, struct netdev_hw_addr *ha, u8 is_uc) { u32 mac_hash = get_unaligned((u32 *)(&ha->addr[2])); struct qeth_mac *mac; hash_for_each_possible(card->mac_htable, mac, hnode, mac_hash) { if (is_uc == mac->is_uc && !memcmp(ha->addr, mac->mac_addr, OSA_ADDR_LEN)) { mac->disp_flag = QETH_DISP_ADDR_DO_NOTHING; return; } } mac = kzalloc(sizeof(struct qeth_mac), GFP_ATOMIC); if (!mac) return; memcpy(mac->mac_addr, ha->addr, OSA_ADDR_LEN); mac->is_uc = is_uc; mac->disp_flag = QETH_DISP_ADDR_ADD; hash_add(card->mac_htable, &mac->hnode, mac_hash); } static void qeth_l2_set_rx_mode(struct net_device *dev) { struct qeth_card *card = dev->ml_priv; struct netdev_hw_addr *ha; struct qeth_mac *mac; struct hlist_node *tmp; int i; int rc; if (card->info.type == QETH_CARD_TYPE_OSN) return; QETH_CARD_TEXT(card, 3, "setmulti"); if (qeth_threads_running(card, QETH_RECOVER_THREAD) && (card->state != CARD_STATE_UP)) return; spin_lock_bh(&card->mclock); netdev_for_each_mc_addr(ha, dev) qeth_l2_add_mac(card, ha, 0); netdev_for_each_uc_addr(ha, dev) qeth_l2_add_mac(card, ha, 1); hash_for_each_safe(card->mac_htable, i, tmp, mac, hnode) { if (mac->disp_flag == QETH_DISP_ADDR_DELETE) { qeth_l2_remove_mac(card, mac); hash_del(&mac->hnode); kfree(mac); } else if (mac->disp_flag == QETH_DISP_ADDR_ADD) { rc = qeth_l2_write_mac(card, mac); if (rc) { hash_del(&mac->hnode); kfree(mac); } else mac->disp_flag = QETH_DISP_ADDR_DELETE; } else mac->disp_flag = QETH_DISP_ADDR_DELETE; } spin_unlock_bh(&card->mclock); if (qeth_adp_supported(card, IPA_SETADP_SET_PROMISC_MODE)) qeth_setadp_promisc_mode(card); else qeth_promisc_to_bridge(card); } static int qeth_l2_xmit_iqd(struct qeth_card *card, struct sk_buff *skb, struct qeth_qdio_out_q *queue, int cast_type) { unsigned int data_offset = ETH_HLEN; struct qeth_hdr *hdr; int rc; hdr = kmem_cache_alloc(qeth_core_header_cache, GFP_ATOMIC); if (!hdr) return -ENOMEM; qeth_l2_fill_header(hdr, skb, cast_type, skb->len); skb_copy_from_linear_data(skb, ((char *)hdr) + sizeof(*hdr), data_offset); if (!qeth_get_elements_no(card, skb, 1, data_offset)) { rc = -E2BIG; goto out; } rc = qeth_do_send_packet_fast(card, queue, skb, hdr, data_offset, sizeof(*hdr) + data_offset); out: if (rc) kmem_cache_free(qeth_core_header_cache, hdr); return rc; } static int qeth_l2_xmit_osa(struct qeth_card *card, struct sk_buff *skb, struct qeth_qdio_out_q *queue, int cast_type) { int push_len = sizeof(struct qeth_hdr); unsigned int elements, nr_frags; unsigned int hdr_elements = 0; struct qeth_hdr *hdr = NULL; unsigned int hd_len = 0; int rc; /* fix hardware limitation: as long as we do not have sbal * chaining we can not send long frag lists */ if (!qeth_get_elements_no(card, skb, 0, 0)) { rc = skb_linearize(skb); if (card->options.performance_stats) { if (rc) card->perf_stats.tx_linfail++; else card->perf_stats.tx_lin++; } if (rc) return rc; } nr_frags = skb_shinfo(skb)->nr_frags; rc = skb_cow_head(skb, push_len); if (rc) return rc; push_len = qeth_push_hdr(skb, &hdr, push_len); if (push_len < 0) return push_len; if (!push_len) { /* hdr was allocated from cache */ hd_len = sizeof(*hdr); hdr_elements = 1; } qeth_l2_fill_header(hdr, skb, cast_type, skb->len - push_len); if (skb->ip_summed == CHECKSUM_PARTIAL) qeth_l2_hdr_csum(card, hdr, skb); elements = qeth_get_elements_no(card, skb, hdr_elements, 0); if (!elements) { rc = -E2BIG; goto out; } elements += hdr_elements; /* TODO: remove the skb_orphan() once TX completion is fast enough */ skb_orphan(skb); rc = qeth_do_send_packet(card, queue, skb, hdr, 0, hd_len, elements); out: if (!rc) { if (card->options.performance_stats && nr_frags) { card->perf_stats.sg_skbs_sent++; /* nr_frags + skb->data */ card->perf_stats.sg_frags_sent += nr_frags + 1; } } else { if (hd_len) kmem_cache_free(qeth_core_header_cache, hdr); if (rc == -EBUSY) /* roll back to ETH header */ skb_pull(skb, push_len); } return rc; } static int qeth_l2_xmit_osn(struct qeth_card *card, struct sk_buff *skb, struct qeth_qdio_out_q *queue) { unsigned int elements; struct qeth_hdr *hdr; if (skb->protocol == htons(ETH_P_IPV6)) return -EPROTONOSUPPORT; hdr = (struct qeth_hdr *)skb->data; elements = qeth_get_elements_no(card, skb, 0, 0); if (!elements) return -E2BIG; if (qeth_hdr_chk_and_bounce(skb, &hdr, sizeof(*hdr))) return -EINVAL; return qeth_do_send_packet(card, queue, skb, hdr, 0, 0, elements); } static netdev_tx_t qeth_l2_hard_start_xmit(struct sk_buff *skb, struct net_device *dev) { struct qeth_card *card = dev->ml_priv; int cast_type = qeth_l2_get_cast_type(card, skb); struct qeth_qdio_out_q *queue; int tx_bytes = skb->len; int rc; if (card->qdio.do_prio_queueing || (cast_type && card->info.is_multicast_different)) queue = card->qdio.out_qs[qeth_get_priority_queue(card, skb, qeth_get_ip_version(skb), cast_type)]; else queue = card->qdio.out_qs[card->qdio.default_out_queue]; if ((card->state != CARD_STATE_UP) || !card->lan_online) { card->stats.tx_carrier_errors++; goto tx_drop; } if (card->options.performance_stats) { card->perf_stats.outbound_cnt++; card->perf_stats.outbound_start_time = qeth_get_micros(); } netif_stop_queue(dev); switch (card->info.type) { case QETH_CARD_TYPE_OSN: rc = qeth_l2_xmit_osn(card, skb, queue); break; case QETH_CARD_TYPE_IQD: rc = qeth_l2_xmit_iqd(card, skb, queue, cast_type); break; default: rc = qeth_l2_xmit_osa(card, skb, queue, cast_type); } if (!rc) { card->stats.tx_packets++; card->stats.tx_bytes += tx_bytes; if (card->options.performance_stats) card->perf_stats.outbound_time += qeth_get_micros() - card->perf_stats.outbound_start_time; netif_wake_queue(dev); return NETDEV_TX_OK; } else if (rc == -EBUSY) { return NETDEV_TX_BUSY; } /* else fall through */ tx_drop: card->stats.tx_dropped++; card->stats.tx_errors++; dev_kfree_skb_any(skb); netif_wake_queue(dev); return NETDEV_TX_OK; } static int __qeth_l2_open(struct net_device *dev) { struct qeth_card *card = dev->ml_priv; int rc = 0; QETH_CARD_TEXT(card, 4, "qethopen"); if (card->state == CARD_STATE_UP) return rc; if (card->state != CARD_STATE_SOFTSETUP) return -ENODEV; if ((card->info.type != QETH_CARD_TYPE_OSN) && (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))) { QETH_CARD_TEXT(card, 4, "nomacadr"); return -EPERM; } card->data.state = CH_STATE_UP; card->state = CARD_STATE_UP; netif_start_queue(dev); if (qdio_stop_irq(card->data.ccwdev, 0) >= 0) { napi_enable(&card->napi); local_bh_disable(); napi_schedule(&card->napi); /* kick-start the NAPI softirq: */ local_bh_enable(); } else rc = -EIO; return rc; } static int qeth_l2_open(struct net_device *dev) { struct qeth_card *card = dev->ml_priv; QETH_CARD_TEXT(card, 5, "qethope_"); if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) { QETH_CARD_TEXT(card, 3, "openREC"); return -ERESTARTSYS; } return __qeth_l2_open(dev); } static int qeth_l2_stop(struct net_device *dev) { struct qeth_card *card = dev->ml_priv; QETH_CARD_TEXT(card, 4, "qethstop"); netif_tx_disable(dev); if (card->state == CARD_STATE_UP) { card->state = CARD_STATE_SOFTSETUP; napi_disable(&card->napi); } return 0; } static const struct device_type qeth_l2_devtype = { .name = "qeth_layer2", .groups = qeth_l2_attr_groups, }; static int qeth_l2_probe_device(struct ccwgroup_device *gdev) { struct qeth_card *card = dev_get_drvdata(&gdev->dev); int rc; if (gdev->dev.type == &qeth_generic_devtype) { rc = qeth_l2_create_device_attributes(&gdev->dev); if (rc) return rc; } INIT_LIST_HEAD(&card->vid_list); hash_init(card->mac_htable); card->options.layer2 = 1; card->info.hwtrap = 0; return 0; } static void qeth_l2_remove_device(struct ccwgroup_device *cgdev) { struct qeth_card *card = dev_get_drvdata(&cgdev->dev); if (cgdev->dev.type == &qeth_generic_devtype) qeth_l2_remove_device_attributes(&cgdev->dev); qeth_set_allowed_threads(card, 0, 1); wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0); if (cgdev->state == CCWGROUP_ONLINE) qeth_l2_set_offline(cgdev); if (card->dev) { unregister_netdev(card->dev); free_netdev(card->dev); card->dev = NULL; } return; } static const struct ethtool_ops qeth_l2_ethtool_ops = { .get_link = ethtool_op_get_link, .get_strings = qeth_core_get_strings, .get_ethtool_stats = qeth_core_get_ethtool_stats, .get_sset_count = qeth_core_get_sset_count, .get_drvinfo = qeth_core_get_drvinfo, .get_link_ksettings = qeth_core_ethtool_get_link_ksettings, }; static const struct ethtool_ops qeth_l2_osn_ops = { .get_strings = qeth_core_get_strings, .get_ethtool_stats = qeth_core_get_ethtool_stats, .get_sset_count = qeth_core_get_sset_count, .get_drvinfo = qeth_core_get_drvinfo, }; static const struct net_device_ops qeth_l2_netdev_ops = { .ndo_open = qeth_l2_open, .ndo_stop = qeth_l2_stop, .ndo_get_stats = qeth_get_stats, .ndo_start_xmit = qeth_l2_hard_start_xmit, .ndo_features_check = qeth_features_check, .ndo_validate_addr = eth_validate_addr, .ndo_set_rx_mode = qeth_l2_set_rx_mode, .ndo_do_ioctl = qeth_do_ioctl, .ndo_set_mac_address = qeth_l2_set_mac_address, .ndo_change_mtu = qeth_change_mtu, .ndo_vlan_rx_add_vid = qeth_l2_vlan_rx_add_vid, .ndo_vlan_rx_kill_vid = qeth_l2_vlan_rx_kill_vid, .ndo_tx_timeout = qeth_tx_timeout, .ndo_fix_features = qeth_fix_features, .ndo_set_features = qeth_set_features }; static int qeth_l2_setup_netdev(struct qeth_card *card) { switch (card->info.type) { case QETH_CARD_TYPE_IQD: card->dev = alloc_netdev(0, "hsi%d", NET_NAME_UNKNOWN, ether_setup); break; case QETH_CARD_TYPE_OSN: card->dev = alloc_netdev(0, "osn%d", NET_NAME_UNKNOWN, ether_setup); break; default: card->dev = alloc_etherdev(0); } if (!card->dev) return -ENODEV; card->dev->ml_priv = card; card->dev->watchdog_timeo = QETH_TX_TIMEOUT; card->dev->mtu = card->info.initial_mtu; card->dev->min_mtu = 64; card->dev->max_mtu = ETH_MAX_MTU; card->dev->netdev_ops = &qeth_l2_netdev_ops; if (card->info.type == QETH_CARD_TYPE_OSN) { card->dev->ethtool_ops = &qeth_l2_osn_ops; card->dev->flags |= IFF_NOARP; } else { card->dev->ethtool_ops = &qeth_l2_ethtool_ops; } card->dev->features |= NETIF_F_HW_VLAN_CTAG_FILTER; if (card->info.type == QETH_CARD_TYPE_OSD && !card->info.guestlan) { card->dev->hw_features = NETIF_F_SG; card->dev->vlan_features = NETIF_F_SG; card->dev->features |= NETIF_F_SG; /* OSA 3S and earlier has no RX/TX support */ if (qeth_is_supported(card, IPA_OUTBOUND_CHECKSUM)) { card->dev->hw_features |= NETIF_F_IP_CSUM; card->dev->vlan_features |= NETIF_F_IP_CSUM; } if (qeth_is_supported(card, IPA_INBOUND_CHECKSUM)) { card->dev->hw_features |= NETIF_F_RXCSUM; card->dev->vlan_features |= NETIF_F_RXCSUM; } } if (card->info.type != QETH_CARD_TYPE_OSN && card->info.type != QETH_CARD_TYPE_IQD) { card->dev->priv_flags &= ~IFF_TX_SKB_SHARING; card->dev->needed_headroom = sizeof(struct qeth_hdr); } card->info.broadcast_capable = 1; qeth_l2_request_initial_mac(card); SET_NETDEV_DEV(card->dev, &card->gdev->dev); netif_napi_add(card->dev, &card->napi, qeth_poll, QETH_NAPI_WEIGHT); netif_carrier_off(card->dev); return register_netdev(card->dev); } static int qeth_l2_start_ipassists(struct qeth_card *card) { /* configure isolation level */ if (qeth_set_access_ctrl_online(card, 0)) return -ENODEV; return 0; } static void qeth_l2_trace_features(struct qeth_card *card) { QETH_CARD_TEXT(card, 2, "l2featur"); QETH_CARD_HEX(card, 2, &card->options.sbp.supported_funcs, sizeof(card->options.sbp.supported_funcs)); } static int __qeth_l2_set_online(struct ccwgroup_device *gdev, int recovery_mode) { struct qeth_card *card = dev_get_drvdata(&gdev->dev); int rc = 0; enum qeth_card_states recover_flag; mutex_lock(&card->discipline_mutex); mutex_lock(&card->conf_mutex); QETH_DBF_TEXT(SETUP, 2, "setonlin"); QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *)); recover_flag = card->state; rc = qeth_core_hardsetup_card(card); if (rc) { QETH_DBF_TEXT_(SETUP, 2, "2err%04x", rc); rc = -ENODEV; goto out_remove; } qeth_bridgeport_query_support(card); if (card->options.sbp.supported_funcs) dev_info(&card->gdev->dev, "The device represents a Bridge Capable Port\n"); qeth_trace_features(card); qeth_l2_trace_features(card); if (!card->dev && qeth_l2_setup_netdev(card)) { rc = -ENODEV; goto out_remove; } if (card->info.type != QETH_CARD_TYPE_OSN) qeth_l2_send_setmac(card, &card->dev->dev_addr[0]); if (qeth_is_diagass_supported(card, QETH_DIAGS_CMD_TRAP)) { if (card->info.hwtrap && qeth_hw_trap(card, QETH_DIAGS_TRAP_ARM)) card->info.hwtrap = 0; } else card->info.hwtrap = 0; qeth_l2_setup_bridgeport_attrs(card); card->state = CARD_STATE_HARDSETUP; memset(&card->rx, 0, sizeof(struct qeth_rx)); qeth_print_status_message(card); /* softsetup */ QETH_DBF_TEXT(SETUP, 2, "softsetp"); if ((card->info.type == QETH_CARD_TYPE_OSD) || (card->info.type == QETH_CARD_TYPE_OSX)) { rc = qeth_l2_start_ipassists(card); if (rc) goto out_remove; } if (card->info.type != QETH_CARD_TYPE_OSN && card->info.type != QETH_CARD_TYPE_OSM) qeth_l2_process_vlans(card); netif_tx_disable(card->dev); rc = qeth_init_qdio_queues(card); if (rc) { QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc); rc = -ENODEV; goto out_remove; } card->state = CARD_STATE_SOFTSETUP; if (card->lan_online) netif_carrier_on(card->dev); else netif_carrier_off(card->dev); qeth_set_allowed_threads(card, 0xffffffff, 0); if (recover_flag == CARD_STATE_RECOVER) { if (recovery_mode && card->info.type != QETH_CARD_TYPE_OSN) { __qeth_l2_open(card->dev); } else { rtnl_lock(); dev_open(card->dev); rtnl_unlock(); } /* this also sets saved unicast addresses */ qeth_l2_set_rx_mode(card->dev); rtnl_lock(); qeth_recover_features(card->dev); rtnl_unlock(); } /* let user_space know that device is online */ kobject_uevent(&gdev->dev.kobj, KOBJ_CHANGE); mutex_unlock(&card->conf_mutex); mutex_unlock(&card->discipline_mutex); return 0; out_remove: qeth_l2_stop_card(card, 0); ccw_device_set_offline(CARD_DDEV(card)); ccw_device_set_offline(CARD_WDEV(card)); ccw_device_set_offline(CARD_RDEV(card)); qdio_free(CARD_DDEV(card)); if (recover_flag == CARD_STATE_RECOVER) card->state = CARD_STATE_RECOVER; else card->state = CARD_STATE_DOWN; mutex_unlock(&card->conf_mutex); mutex_unlock(&card->discipline_mutex); return rc; } static int qeth_l2_set_online(struct ccwgroup_device *gdev) { return __qeth_l2_set_online(gdev, 0); } static int __qeth_l2_set_offline(struct ccwgroup_device *cgdev, int recovery_mode) { struct qeth_card *card = dev_get_drvdata(&cgdev->dev); int rc = 0, rc2 = 0, rc3 = 0; enum qeth_card_states recover_flag; mutex_lock(&card->discipline_mutex); mutex_lock(&card->conf_mutex); QETH_DBF_TEXT(SETUP, 3, "setoffl"); QETH_DBF_HEX(SETUP, 3, &card, sizeof(void *)); if (card->dev && netif_carrier_ok(card->dev)) netif_carrier_off(card->dev); recover_flag = card->state; if ((!recovery_mode && card->info.hwtrap) || card->info.hwtrap == 2) { qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM); card->info.hwtrap = 1; } qeth_l2_stop_card(card, recovery_mode); rc = ccw_device_set_offline(CARD_DDEV(card)); rc2 = ccw_device_set_offline(CARD_WDEV(card)); rc3 = ccw_device_set_offline(CARD_RDEV(card)); if (!rc) rc = (rc2) ? rc2 : rc3; if (rc) QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc); qdio_free(CARD_DDEV(card)); if (recover_flag == CARD_STATE_UP) card->state = CARD_STATE_RECOVER; /* let user_space know that device is offline */ kobject_uevent(&cgdev->dev.kobj, KOBJ_CHANGE); mutex_unlock(&card->conf_mutex); mutex_unlock(&card->discipline_mutex); return 0; } static int qeth_l2_set_offline(struct ccwgroup_device *cgdev) { return __qeth_l2_set_offline(cgdev, 0); } static int qeth_l2_recover(void *ptr) { struct qeth_card *card; int rc = 0; card = (struct qeth_card *) ptr; QETH_CARD_TEXT(card, 2, "recover1"); if (!qeth_do_run_thread(card, QETH_RECOVER_THREAD)) return 0; QETH_CARD_TEXT(card, 2, "recover2"); dev_warn(&card->gdev->dev, "A recovery process has been started for the device\n"); qeth_set_recovery_task(card); __qeth_l2_set_offline(card->gdev, 1); rc = __qeth_l2_set_online(card->gdev, 1); if (!rc) dev_info(&card->gdev->dev, "Device successfully recovered!\n"); else { qeth_close_dev(card); dev_warn(&card->gdev->dev, "The qeth device driver " "failed to recover an error on the device\n"); } qeth_clear_recovery_task(card); qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD); qeth_clear_thread_running_bit(card, QETH_RECOVER_THREAD); return 0; } static int __init qeth_l2_init(void) { pr_info("register layer 2 discipline\n"); return 0; } static void __exit qeth_l2_exit(void) { pr_info("unregister layer 2 discipline\n"); } static int qeth_l2_pm_suspend(struct ccwgroup_device *gdev) { struct qeth_card *card = dev_get_drvdata(&gdev->dev); if (card->dev) netif_device_detach(card->dev); qeth_set_allowed_threads(card, 0, 1); wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0); if (gdev->state == CCWGROUP_OFFLINE) return 0; if (card->state == CARD_STATE_UP) { if (card->info.hwtrap) qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM); __qeth_l2_set_offline(card->gdev, 1); } else __qeth_l2_set_offline(card->gdev, 0); return 0; } static int qeth_l2_pm_resume(struct ccwgroup_device *gdev) { struct qeth_card *card = dev_get_drvdata(&gdev->dev); int rc = 0; if (gdev->state == CCWGROUP_OFFLINE) goto out; if (card->state == CARD_STATE_RECOVER) { rc = __qeth_l2_set_online(card->gdev, 1); if (rc) { rtnl_lock(); dev_close(card->dev); rtnl_unlock(); } } else rc = __qeth_l2_set_online(card->gdev, 0); out: qeth_set_allowed_threads(card, 0xffffffff, 0); if (card->dev) netif_device_attach(card->dev); if (rc) dev_warn(&card->gdev->dev, "The qeth device driver " "failed to recover an error on the device\n"); return rc; } /* Returns zero if the command is successfully "consumed" */ static int qeth_l2_control_event(struct qeth_card *card, struct qeth_ipa_cmd *cmd) { switch (cmd->hdr.command) { case IPA_CMD_SETBRIDGEPORT_OSA: case IPA_CMD_SETBRIDGEPORT_IQD: if (cmd->data.sbp.hdr.command_code == IPA_SBP_BRIDGE_PORT_STATE_CHANGE) { qeth_bridge_state_change(card, cmd); return 0; } else return 1; case IPA_CMD_ADDRESS_CHANGE_NOTIF: qeth_bridge_host_event(card, cmd); return 0; default: return 1; } } struct qeth_discipline qeth_l2_discipline = { .devtype = &qeth_l2_devtype, .start_poll = qeth_qdio_start_poll, .input_handler = (qdio_handler_t *) qeth_qdio_input_handler, .output_handler = (qdio_handler_t *) qeth_qdio_output_handler, .process_rx_buffer = qeth_l2_process_inbound_buffer, .recover = qeth_l2_recover, .setup = qeth_l2_probe_device, .remove = qeth_l2_remove_device, .set_online = qeth_l2_set_online, .set_offline = qeth_l2_set_offline, .freeze = qeth_l2_pm_suspend, .thaw = qeth_l2_pm_resume, .restore = qeth_l2_pm_resume, .do_ioctl = NULL, .control_event_handler = qeth_l2_control_event, }; EXPORT_SYMBOL_GPL(qeth_l2_discipline); static int qeth_osn_send_control_data(struct qeth_card *card, int len, struct qeth_cmd_buffer *iob) { unsigned long flags; int rc = 0; QETH_CARD_TEXT(card, 5, "osndctrd"); wait_event(card->wait_q, atomic_cmpxchg(&card->write.irq_pending, 0, 1) == 0); qeth_prepare_control_data(card, len, iob); QETH_CARD_TEXT(card, 6, "osnoirqp"); spin_lock_irqsave(get_ccwdev_lock(card->write.ccwdev), flags); rc = ccw_device_start(card->write.ccwdev, &card->write.ccw, (addr_t) iob, 0, 0); spin_unlock_irqrestore(get_ccwdev_lock(card->write.ccwdev), flags); if (rc) { QETH_DBF_MESSAGE(2, "qeth_osn_send_control_data: " "ccw_device_start rc = %i\n", rc); QETH_CARD_TEXT_(card, 2, " err%d", rc); qeth_release_buffer(iob->channel, iob); atomic_set(&card->write.irq_pending, 0); wake_up(&card->wait_q); } return rc; } static int qeth_osn_send_ipa_cmd(struct qeth_card *card, struct qeth_cmd_buffer *iob, int data_len) { u16 s1, s2; QETH_CARD_TEXT(card, 4, "osndipa"); qeth_prepare_ipa_cmd(card, iob, QETH_PROT_OSN2); s1 = (u16)(IPA_PDU_HEADER_SIZE + data_len); s2 = (u16)data_len; memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &s1, 2); memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &s2, 2); memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &s2, 2); memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &s2, 2); return qeth_osn_send_control_data(card, s1, iob); } int qeth_osn_assist(struct net_device *dev, void *data, int data_len) { struct qeth_cmd_buffer *iob; struct qeth_card *card; int rc; if (!dev) return -ENODEV; card = dev->ml_priv; if (!card) return -ENODEV; QETH_CARD_TEXT(card, 2, "osnsdmc"); if (!qeth_card_hw_is_reachable(card)) return -ENODEV; iob = qeth_wait_for_buffer(&card->write); memcpy(iob->data+IPA_PDU_HEADER_SIZE, data, data_len); rc = qeth_osn_send_ipa_cmd(card, iob, data_len); return rc; } EXPORT_SYMBOL(qeth_osn_assist); int qeth_osn_register(unsigned char *read_dev_no, struct net_device **dev, int (*assist_cb)(struct net_device *, void *), int (*data_cb)(struct sk_buff *)) { struct qeth_card *card; *dev = qeth_l2_netdev_by_devno(read_dev_no); if (*dev == NULL) return -ENODEV; card = (*dev)->ml_priv; if (!card) return -ENODEV; QETH_CARD_TEXT(card, 2, "osnreg"); if ((assist_cb == NULL) || (data_cb == NULL)) return -EINVAL; card->osn_info.assist_cb = assist_cb; card->osn_info.data_cb = data_cb; return 0; } EXPORT_SYMBOL(qeth_osn_register); void qeth_osn_deregister(struct net_device *dev) { struct qeth_card *card; if (!dev) return; card = dev->ml_priv; if (!card) return; QETH_CARD_TEXT(card, 2, "osndereg"); card->osn_info.assist_cb = NULL; card->osn_info.data_cb = NULL; return; } EXPORT_SYMBOL(qeth_osn_deregister); /* SETBRIDGEPORT support, async notifications */ enum qeth_an_event_type {anev_reg_unreg, anev_abort, anev_reset}; /** * qeth_bridge_emit_host_event() - bridgeport address change notification * @card: qeth_card structure pointer, for udev events. * @evtype: "normal" register/unregister, or abort, or reset. For abort * and reset token and addr_lnid are unused and may be NULL. * @code: event bitmask: high order bit 0x80 value 1 means removal of an * object, 0 - addition of an object. * 0x01 - VLAN, 0x02 - MAC, 0x03 - VLAN and MAC. * @token: "network token" structure identifying physical address of the port. * @addr_lnid: pointer to structure with MAC address and VLAN ID. * * This function is called when registrations and deregistrations are * reported by the hardware, and also when notifications are enabled - * for all currently registered addresses. */ static void qeth_bridge_emit_host_event(struct qeth_card *card, enum qeth_an_event_type evtype, u8 code, struct net_if_token *token, struct mac_addr_lnid *addr_lnid) { char str[7][32]; char *env[8]; int i = 0; switch (evtype) { case anev_reg_unreg: snprintf(str[i], sizeof(str[i]), "BRIDGEDHOST=%s", (code & IPA_ADDR_CHANGE_CODE_REMOVAL) ? "deregister" : "register"); env[i] = str[i]; i++; if (code & IPA_ADDR_CHANGE_CODE_VLANID) { snprintf(str[i], sizeof(str[i]), "VLAN=%d", addr_lnid->lnid); env[i] = str[i]; i++; } if (code & IPA_ADDR_CHANGE_CODE_MACADDR) { snprintf(str[i], sizeof(str[i]), "MAC=%pM", addr_lnid->mac); env[i] = str[i]; i++; } snprintf(str[i], sizeof(str[i]), "NTOK_BUSID=%x.%x.%04x", token->cssid, token->ssid, token->devnum); env[i] = str[i]; i++; snprintf(str[i], sizeof(str[i]), "NTOK_IID=%02x", token->iid); env[i] = str[i]; i++; snprintf(str[i], sizeof(str[i]), "NTOK_CHPID=%02x", token->chpid); env[i] = str[i]; i++; snprintf(str[i], sizeof(str[i]), "NTOK_CHID=%04x", token->chid); env[i] = str[i]; i++; break; case anev_abort: snprintf(str[i], sizeof(str[i]), "BRIDGEDHOST=abort"); env[i] = str[i]; i++; break; case anev_reset: snprintf(str[i], sizeof(str[i]), "BRIDGEDHOST=reset"); env[i] = str[i]; i++; break; } env[i] = NULL; kobject_uevent_env(&card->gdev->dev.kobj, KOBJ_CHANGE, env); } struct qeth_bridge_state_data { struct work_struct worker; struct qeth_card *card; struct qeth_sbp_state_change qports; }; static void qeth_bridge_state_change_worker(struct work_struct *work) { struct qeth_bridge_state_data *data = container_of(work, struct qeth_bridge_state_data, worker); /* We are only interested in the first entry - local port */ struct qeth_sbp_port_entry *entry = &data->qports.entry[0]; char env_locrem[32]; char env_role[32]; char env_state[32]; char *env[] = { env_locrem, env_role, env_state, NULL }; /* Role should not change by itself, but if it did, */ /* information from the hardware is authoritative. */ mutex_lock(&data->card->conf_mutex); data->card->options.sbp.role = entry->role; mutex_unlock(&data->card->conf_mutex); snprintf(env_locrem, sizeof(env_locrem), "BRIDGEPORT=statechange"); snprintf(env_role, sizeof(env_role), "ROLE=%s", (entry->role == QETH_SBP_ROLE_NONE) ? "none" : (entry->role == QETH_SBP_ROLE_PRIMARY) ? "primary" : (entry->role == QETH_SBP_ROLE_SECONDARY) ? "secondary" : ""); snprintf(env_state, sizeof(env_state), "STATE=%s", (entry->state == QETH_SBP_STATE_INACTIVE) ? "inactive" : (entry->state == QETH_SBP_STATE_STANDBY) ? "standby" : (entry->state == QETH_SBP_STATE_ACTIVE) ? "active" : ""); kobject_uevent_env(&data->card->gdev->dev.kobj, KOBJ_CHANGE, env); kfree(data); } static void qeth_bridge_state_change(struct qeth_card *card, struct qeth_ipa_cmd *cmd) { struct qeth_sbp_state_change *qports = &cmd->data.sbp.data.state_change; struct qeth_bridge_state_data *data; int extrasize; QETH_CARD_TEXT(card, 2, "brstchng"); if (qports->num_entries == 0) { QETH_CARD_TEXT(card, 2, "BPempty"); return; } if (qports->entry_length != sizeof(struct qeth_sbp_port_entry)) { QETH_CARD_TEXT_(card, 2, "BPsz%04x", qports->entry_length); return; } extrasize = sizeof(struct qeth_sbp_port_entry) * qports->num_entries; data = kzalloc(sizeof(struct qeth_bridge_state_data) + extrasize, GFP_ATOMIC); if (!data) { QETH_CARD_TEXT(card, 2, "BPSalloc"); return; } INIT_WORK(&data->worker, qeth_bridge_state_change_worker); data->card = card; memcpy(&data->qports, qports, sizeof(struct qeth_sbp_state_change) + extrasize); queue_work(qeth_wq, &data->worker); } struct qeth_bridge_host_data { struct work_struct worker; struct qeth_card *card; struct qeth_ipacmd_addr_change hostevs; }; static void qeth_bridge_host_event_worker(struct work_struct *work) { struct qeth_bridge_host_data *data = container_of(work, struct qeth_bridge_host_data, worker); int i; if (data->hostevs.lost_event_mask) { dev_info(&data->card->gdev->dev, "Address notification from the Bridge Port stopped %s (%s)\n", data->card->dev->name, (data->hostevs.lost_event_mask == 0x01) ? "Overflow" : (data->hostevs.lost_event_mask == 0x02) ? "Bridge port state change" : "Unknown reason"); mutex_lock(&data->card->conf_mutex); data->card->options.sbp.hostnotification = 0; mutex_unlock(&data->card->conf_mutex); qeth_bridge_emit_host_event(data->card, anev_abort, 0, NULL, NULL); } else for (i = 0; i < data->hostevs.num_entries; i++) { struct qeth_ipacmd_addr_change_entry *entry = &data->hostevs.entry[i]; qeth_bridge_emit_host_event(data->card, anev_reg_unreg, entry->change_code, &entry->token, &entry->addr_lnid); } kfree(data); } static void qeth_bridge_host_event(struct qeth_card *card, struct qeth_ipa_cmd *cmd) { struct qeth_ipacmd_addr_change *hostevs = &cmd->data.addrchange; struct qeth_bridge_host_data *data; int extrasize; QETH_CARD_TEXT(card, 2, "brhostev"); if (cmd->hdr.return_code != 0x0000) { if (cmd->hdr.return_code == 0x0010) { if (hostevs->lost_event_mask == 0x00) hostevs->lost_event_mask = 0xff; } else { QETH_CARD_TEXT_(card, 2, "BPHe%04x", cmd->hdr.return_code); return; } } extrasize = sizeof(struct qeth_ipacmd_addr_change_entry) * hostevs->num_entries; data = kzalloc(sizeof(struct qeth_bridge_host_data) + extrasize, GFP_ATOMIC); if (!data) { QETH_CARD_TEXT(card, 2, "BPHalloc"); return; } INIT_WORK(&data->worker, qeth_bridge_host_event_worker); data->card = card; memcpy(&data->hostevs, hostevs, sizeof(struct qeth_ipacmd_addr_change) + extrasize); queue_work(qeth_wq, &data->worker); } /* SETBRIDGEPORT support; sending commands */ struct _qeth_sbp_cbctl { u16 ipa_rc; u16 cmd_rc; union { u32 supported; struct { enum qeth_sbp_roles *role; enum qeth_sbp_states *state; } qports; } data; }; /** * qeth_bridgeport_makerc() - derive "traditional" error from hardware codes. * @card: qeth_card structure pointer, for debug messages. * @cbctl: state structure with hardware return codes. * @setcmd: IPA command code * * Returns negative errno-compatible error indication or 0 on success. */ static int qeth_bridgeport_makerc(struct qeth_card *card, struct _qeth_sbp_cbctl *cbctl, enum qeth_ipa_sbp_cmd setcmd) { int rc; int is_iqd = (card->info.type == QETH_CARD_TYPE_IQD); if ((is_iqd && (cbctl->ipa_rc == IPA_RC_SUCCESS)) || (!is_iqd && (cbctl->ipa_rc == cbctl->cmd_rc))) switch (cbctl->cmd_rc) { case IPA_RC_SUCCESS: rc = 0; break; case IPA_RC_L2_UNSUPPORTED_CMD: case IPA_RC_UNSUPPORTED_COMMAND: rc = -EOPNOTSUPP; break; case IPA_RC_SBP_OSA_NOT_CONFIGURED: case IPA_RC_SBP_IQD_NOT_CONFIGURED: rc = -ENODEV; /* maybe not the best code here? */ dev_err(&card->gdev->dev, "The device is not configured as a Bridge Port\n"); break; case IPA_RC_SBP_OSA_OS_MISMATCH: case IPA_RC_SBP_IQD_OS_MISMATCH: rc = -EPERM; dev_err(&card->gdev->dev, "A Bridge Port is already configured by a different operating system\n"); break; case IPA_RC_SBP_OSA_ANO_DEV_PRIMARY: case IPA_RC_SBP_IQD_ANO_DEV_PRIMARY: switch (setcmd) { case IPA_SBP_SET_PRIMARY_BRIDGE_PORT: rc = -EEXIST; dev_err(&card->gdev->dev, "The LAN already has a primary Bridge Port\n"); break; case IPA_SBP_SET_SECONDARY_BRIDGE_PORT: rc = -EBUSY; dev_err(&card->gdev->dev, "The device is already a primary Bridge Port\n"); break; default: rc = -EIO; } break; case IPA_RC_SBP_OSA_CURRENT_SECOND: case IPA_RC_SBP_IQD_CURRENT_SECOND: rc = -EBUSY; dev_err(&card->gdev->dev, "The device is already a secondary Bridge Port\n"); break; case IPA_RC_SBP_OSA_LIMIT_SECOND: case IPA_RC_SBP_IQD_LIMIT_SECOND: rc = -EEXIST; dev_err(&card->gdev->dev, "The LAN cannot have more secondary Bridge Ports\n"); break; case IPA_RC_SBP_OSA_CURRENT_PRIMARY: case IPA_RC_SBP_IQD_CURRENT_PRIMARY: rc = -EBUSY; dev_err(&card->gdev->dev, "The device is already a primary Bridge Port\n"); break; case IPA_RC_SBP_OSA_NOT_AUTHD_BY_ZMAN: case IPA_RC_SBP_IQD_NOT_AUTHD_BY_ZMAN: rc = -EACCES; dev_err(&card->gdev->dev, "The device is not authorized to be a Bridge Port\n"); break; default: rc = -EIO; } else switch (cbctl->ipa_rc) { case IPA_RC_NOTSUPP: rc = -EOPNOTSUPP; break; case IPA_RC_UNSUPPORTED_COMMAND: rc = -EOPNOTSUPP; break; default: rc = -EIO; } if (rc) { QETH_CARD_TEXT_(card, 2, "SBPi%04x", cbctl->ipa_rc); QETH_CARD_TEXT_(card, 2, "SBPc%04x", cbctl->cmd_rc); } return rc; } static struct qeth_cmd_buffer *qeth_sbp_build_cmd(struct qeth_card *card, enum qeth_ipa_sbp_cmd sbp_cmd, unsigned int cmd_length) { enum qeth_ipa_cmds ipa_cmd = (card->info.type == QETH_CARD_TYPE_IQD) ? IPA_CMD_SETBRIDGEPORT_IQD : IPA_CMD_SETBRIDGEPORT_OSA; struct qeth_cmd_buffer *iob; struct qeth_ipa_cmd *cmd; iob = qeth_get_ipacmd_buffer(card, ipa_cmd, 0); if (!iob) return iob; cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE); cmd->data.sbp.hdr.cmdlength = sizeof(struct qeth_ipacmd_sbp_hdr) + cmd_length; cmd->data.sbp.hdr.command_code = sbp_cmd; cmd->data.sbp.hdr.used_total = 1; cmd->data.sbp.hdr.seq_no = 1; return iob; } static int qeth_bridgeport_query_support_cb(struct qeth_card *card, struct qeth_reply *reply, unsigned long data) { struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data; struct _qeth_sbp_cbctl *cbctl = (struct _qeth_sbp_cbctl *)reply->param; QETH_CARD_TEXT(card, 2, "brqsupcb"); cbctl->ipa_rc = cmd->hdr.return_code; cbctl->cmd_rc = cmd->data.sbp.hdr.return_code; if ((cbctl->ipa_rc == 0) && (cbctl->cmd_rc == 0)) { cbctl->data.supported = cmd->data.sbp.data.query_cmds_supp.supported_cmds; } else { cbctl->data.supported = 0; } return 0; } /** * qeth_bridgeport_query_support() - store bitmask of supported subfunctions. * @card: qeth_card structure pointer. * * Sets bitmask of supported setbridgeport subfunctions in the qeth_card * strucutre: card->options.sbp.supported_funcs. */ static void qeth_bridgeport_query_support(struct qeth_card *card) { struct qeth_cmd_buffer *iob; struct _qeth_sbp_cbctl cbctl; QETH_CARD_TEXT(card, 2, "brqsuppo"); iob = qeth_sbp_build_cmd(card, IPA_SBP_QUERY_COMMANDS_SUPPORTED, sizeof(struct qeth_sbp_query_cmds_supp)); if (!iob) return; if (qeth_send_ipa_cmd(card, iob, qeth_bridgeport_query_support_cb, (void *)&cbctl) || qeth_bridgeport_makerc(card, &cbctl, IPA_SBP_QUERY_COMMANDS_SUPPORTED)) { /* non-zero makerc signifies failure, and produce messages */ card->options.sbp.role = QETH_SBP_ROLE_NONE; return; } card->options.sbp.supported_funcs = cbctl.data.supported; } static int qeth_bridgeport_query_ports_cb(struct qeth_card *card, struct qeth_reply *reply, unsigned long data) { struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data; struct qeth_sbp_query_ports *qports = &cmd->data.sbp.data.query_ports; struct _qeth_sbp_cbctl *cbctl = (struct _qeth_sbp_cbctl *)reply->param; QETH_CARD_TEXT(card, 2, "brqprtcb"); cbctl->ipa_rc = cmd->hdr.return_code; cbctl->cmd_rc = cmd->data.sbp.hdr.return_code; if ((cbctl->ipa_rc != 0) || (cbctl->cmd_rc != 0)) return 0; if (qports->entry_length != sizeof(struct qeth_sbp_port_entry)) { cbctl->cmd_rc = 0xffff; QETH_CARD_TEXT_(card, 2, "SBPs%04x", qports->entry_length); return 0; } /* first entry contains the state of the local port */ if (qports->num_entries > 0) { if (cbctl->data.qports.role) *cbctl->data.qports.role = qports->entry[0].role; if (cbctl->data.qports.state) *cbctl->data.qports.state = qports->entry[0].state; } return 0; } /** * qeth_bridgeport_query_ports() - query local bridgeport status. * @card: qeth_card structure pointer. * @role: Role of the port: 0-none, 1-primary, 2-secondary. * @state: State of the port: 0-inactive, 1-standby, 2-active. * * Returns negative errno-compatible error indication or 0 on success. * * 'role' and 'state' are not updated in case of hardware operation failure. */ int qeth_bridgeport_query_ports(struct qeth_card *card, enum qeth_sbp_roles *role, enum qeth_sbp_states *state) { int rc = 0; struct qeth_cmd_buffer *iob; struct _qeth_sbp_cbctl cbctl = { .data = { .qports = { .role = role, .state = state, }, }, }; QETH_CARD_TEXT(card, 2, "brqports"); if (!(card->options.sbp.supported_funcs & IPA_SBP_QUERY_BRIDGE_PORTS)) return -EOPNOTSUPP; iob = qeth_sbp_build_cmd(card, IPA_SBP_QUERY_BRIDGE_PORTS, 0); if (!iob) return -ENOMEM; rc = qeth_send_ipa_cmd(card, iob, qeth_bridgeport_query_ports_cb, (void *)&cbctl); if (rc < 0) return rc; return qeth_bridgeport_makerc(card, &cbctl, IPA_SBP_QUERY_BRIDGE_PORTS); } EXPORT_SYMBOL_GPL(qeth_bridgeport_query_ports); static int qeth_bridgeport_set_cb(struct qeth_card *card, struct qeth_reply *reply, unsigned long data) { struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data; struct _qeth_sbp_cbctl *cbctl = (struct _qeth_sbp_cbctl *)reply->param; QETH_CARD_TEXT(card, 2, "brsetrcb"); cbctl->ipa_rc = cmd->hdr.return_code; cbctl->cmd_rc = cmd->data.sbp.hdr.return_code; return 0; } /** * qeth_bridgeport_setrole() - Assign primary role to the port. * @card: qeth_card structure pointer. * @role: Role to assign. * * Returns negative errno-compatible error indication or 0 on success. */ int qeth_bridgeport_setrole(struct qeth_card *card, enum qeth_sbp_roles role) { int rc = 0; int cmdlength; struct qeth_cmd_buffer *iob; struct _qeth_sbp_cbctl cbctl; enum qeth_ipa_sbp_cmd setcmd; QETH_CARD_TEXT(card, 2, "brsetrol"); switch (role) { case QETH_SBP_ROLE_NONE: setcmd = IPA_SBP_RESET_BRIDGE_PORT_ROLE; cmdlength = sizeof(struct qeth_sbp_reset_role); break; case QETH_SBP_ROLE_PRIMARY: setcmd = IPA_SBP_SET_PRIMARY_BRIDGE_PORT; cmdlength = sizeof(struct qeth_sbp_set_primary); break; case QETH_SBP_ROLE_SECONDARY: setcmd = IPA_SBP_SET_SECONDARY_BRIDGE_PORT; cmdlength = sizeof(struct qeth_sbp_set_secondary); break; default: return -EINVAL; } if (!(card->options.sbp.supported_funcs & setcmd)) return -EOPNOTSUPP; iob = qeth_sbp_build_cmd(card, setcmd, cmdlength); if (!iob) return -ENOMEM; rc = qeth_send_ipa_cmd(card, iob, qeth_bridgeport_set_cb, (void *)&cbctl); if (rc < 0) return rc; return qeth_bridgeport_makerc(card, &cbctl, setcmd); } /** * qeth_anset_makerc() - derive "traditional" error from hardware codes. * @card: qeth_card structure pointer, for debug messages. * * Returns negative errno-compatible error indication or 0 on success. */ static int qeth_anset_makerc(struct qeth_card *card, int pnso_rc, u16 response) { int rc; if (pnso_rc == 0) switch (response) { case 0x0001: rc = 0; break; case 0x0004: case 0x0100: case 0x0106: rc = -EOPNOTSUPP; dev_err(&card->gdev->dev, "Setting address notification failed\n"); break; case 0x0107: rc = -EAGAIN; break; default: rc = -EIO; } else rc = -EIO; if (rc) { QETH_CARD_TEXT_(card, 2, "SBPp%04x", pnso_rc); QETH_CARD_TEXT_(card, 2, "SBPr%04x", response); } return rc; } static void qeth_bridgeport_an_set_cb(void *priv, enum qdio_brinfo_entry_type type, void *entry) { struct qeth_card *card = (struct qeth_card *)priv; struct qdio_brinfo_entry_l2 *l2entry; u8 code; if (type != l2_addr_lnid) { WARN_ON_ONCE(1); return; } l2entry = (struct qdio_brinfo_entry_l2 *)entry; code = IPA_ADDR_CHANGE_CODE_MACADDR; if (l2entry->addr_lnid.lnid < VLAN_N_VID) code |= IPA_ADDR_CHANGE_CODE_VLANID; qeth_bridge_emit_host_event(card, anev_reg_unreg, code, (struct net_if_token *)&l2entry->nit, (struct mac_addr_lnid *)&l2entry->addr_lnid); } /** * qeth_bridgeport_an_set() - Enable or disable bridgeport address notification * @card: qeth_card structure pointer. * @enable: 0 - disable, non-zero - enable notifications * * Returns negative errno-compatible error indication or 0 on success. * * On enable, emits a series of address notifications udev events for all * currently registered hosts. */ int qeth_bridgeport_an_set(struct qeth_card *card, int enable) { int rc; u16 response; struct ccw_device *ddev; struct subchannel_id schid; if (!card) return -EINVAL; if (!card->options.sbp.supported_funcs) return -EOPNOTSUPP; ddev = CARD_DDEV(card); ccw_device_get_schid(ddev, &schid); if (enable) { qeth_bridge_emit_host_event(card, anev_reset, 0, NULL, NULL); rc = qdio_pnso_brinfo(schid, 1, &response, qeth_bridgeport_an_set_cb, card); } else rc = qdio_pnso_brinfo(schid, 0, &response, NULL, NULL); return qeth_anset_makerc(card, rc, response); } EXPORT_SYMBOL_GPL(qeth_bridgeport_an_set); module_init(qeth_l2_init); module_exit(qeth_l2_exit); MODULE_AUTHOR("Frank Blaschka "); MODULE_DESCRIPTION("qeth layer 2 discipline"); MODULE_LICENSE("GPL");