diff options
Diffstat (limited to 'drivers/s390/net/qeth_l2_main.c')
| -rw-r--r-- | drivers/s390/net/qeth_l2_main.c | 2405 |
1 files changed, 2405 insertions, 0 deletions
diff --git a/drivers/s390/net/qeth_l2_main.c b/drivers/s390/net/qeth_l2_main.c new file mode 100644 index 000000000..8d30f9ac3 --- /dev/null +++ b/drivers/s390/net/qeth_l2_main.c @@ -0,0 +1,2405 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright IBM Corp. 2007, 2009 + * Author(s): Utz Bacher <utz.bacher@de.ibm.com>, + * Frank Pavlic <fpavlic@de.ibm.com>, + * Thomas Spatzier <tspat@de.ibm.com>, + * Frank Blaschka <frank.blaschka@de.ibm.com> + */ + +#define KMSG_COMPONENT "qeth" +#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt + +#include <linux/module.h> +#include <linux/moduleparam.h> +#include <linux/string.h> +#include <linux/errno.h> +#include <linux/kernel.h> +#include <linux/slab.h> +#include <linux/etherdevice.h> +#include <linux/list.h> +#include <linux/hash.h> +#include <linux/hashtable.h> +#include <asm/setup.h> +#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_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 void qeth_l2_vnicc_set_defaults(struct qeth_card *card); +static void qeth_l2_vnicc_init(struct qeth_card *card); +static bool qeth_l2_vnicc_recover_timeout(struct qeth_card *card, u32 vnicc, + u32 *timeout); + +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_setdelmac_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 = __ipa_cmd(iob); + cmd->data.setdelmac.mac_length = ETH_ALEN; + ether_addr_copy(cmd->data.setdelmac.mac, mac); + return qeth_setdelmac_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) { + dev_info(&card->gdev->dev, + "MAC address %pM successfully registered on device %s\n", + mac, card->dev->name); + } else { + 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_write_mac(struct qeth_card *card, u8 *mac) +{ + enum qeth_ipa_cmds cmd = is_multicast_ether_addr(mac) ? + IPA_CMD_SETGMAC : IPA_CMD_SETVMAC; + int rc; + + QETH_CARD_TEXT(card, 2, "L2Wmac"); + rc = qeth_l2_send_setdelmac(card, mac, cmd); + if (rc == -EEXIST) + QETH_DBF_MESSAGE(2, "MAC %pM already registered on %s\n", + mac, QETH_CARD_IFNAME(card)); + else if (rc) + QETH_DBF_MESSAGE(2, "Failed to register MAC %pM on %s: %d\n", + mac, QETH_CARD_IFNAME(card), rc); + return rc; +} + +static int qeth_l2_remove_mac(struct qeth_card *card, u8 *mac) +{ + enum qeth_ipa_cmds cmd = is_multicast_ether_addr(mac) ? + IPA_CMD_DELGMAC : IPA_CMD_DELVMAC; + int rc; + + QETH_CARD_TEXT(card, 2, "L2Rmac"); + rc = qeth_l2_send_setdelmac(card, mac, cmd); + if (rc) + QETH_DBF_MESSAGE(2, "Failed to delete MAC %pM on %s: %d\n", + mac, QETH_CARD_IFNAME(card), rc); + return rc; +} + +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_UNICAST; + if (is_broadcast_ether_addr(skb->data)) + return RTN_BROADCAST; + if (is_multicast_ether_addr(skb->data)) + return RTN_MULTICAST; + return RTN_UNICAST; +} + +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_setdelvlan_makerc(struct qeth_card *card, int retcode) +{ + if (retcode) + QETH_CARD_TEXT_(card, 2, "err%04x", retcode); + + switch (retcode) { + case IPA_RC_SUCCESS: + return 0; + case IPA_RC_L2_INVALID_VLAN_ID: + return -EINVAL; + case IPA_RC_L2_DUP_VLAN_ID: + return -EEXIST; + case IPA_RC_L2_VLAN_ID_NOT_FOUND: + return -ENOENT; + case IPA_RC_L2_VLAN_ID_NOT_ALLOWED: + return -EPERM; + case -ENOMEM: + return -ENOMEM; + default: + return -EIO; + } +} + +static int qeth_l2_send_setdelvlan_cb(struct qeth_card *card, + struct qeth_reply *reply, + unsigned long data) +{ + struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data; + + QETH_CARD_TEXT(card, 2, "L2sdvcb"); + if (cmd->hdr.return_code) { + QETH_DBF_MESSAGE(2, "Error in processing VLAN %i on %s: 0x%x.\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 = __ipa_cmd(iob); + cmd->data.setdelvlan.vlan_id = i; + return qeth_setdelvlan_makerc(card, 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"); + mutex_lock(&card->vid_list_mutex); + list_for_each_entry(id, &card->vid_list, list) { + qeth_l2_send_setdelvlan(card, id->vid, IPA_CMD_SETVLAN); + } + mutex_unlock(&card->vid_list_mutex); +} + +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 (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) { + QETH_CARD_TEXT(card, 3, "aidREC"); + return 0; + } + id = kmalloc(sizeof(*id), GFP_KERNEL); + if (id) { + id->vid = vid; + rc = qeth_l2_send_setdelvlan(card, vid, IPA_CMD_SETVLAN); + if (rc) { + kfree(id); + return rc; + } + mutex_lock(&card->vid_list_mutex); + list_add_tail(&id->list, &card->vid_list); + mutex_unlock(&card->vid_list_mutex); + } 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 (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) { + QETH_CARD_TEXT(card, 3, "kidREC"); + return 0; + } + mutex_lock(&card->vid_list_mutex); + list_for_each_entry(id, &card->vid_list, list) { + if (id->vid == vid) { + list_del(&id->list); + tmpid = id; + break; + } + } + mutex_unlock(&card->vid_list_mutex); + if (tmpid) { + rc = qeth_l2_send_setdelvlan(card, vid, IPA_CMD_DELVLAN); + kfree(tmpid); + } + 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; + } + switch (hdr->hdr.l2.id) { + case QETH_HEADER_TYPE_LAYER2: + skb->protocol = eth_type_trans(skb, skb->dev); + qeth_rx_csum(card, skb, hdr->hdr.l2.flags[1]); + 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; + + 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) + goto out; + QETH_DBF_MESSAGE(2, "READ_MAC Assist failed on device %s: x%x\n", + CARD_BUS_ID(card), rc); + QETH_DBF_TEXT_(SETUP, 2, "1err%04x", rc); + /* fall back once more: */ + } + + /* some devices don't support a custom MAC address: */ + if (card->info.type == QETH_CARD_TYPE_OSM || + card->info.type == QETH_CARD_TYPE_OSX) + return (rc) ? rc : -EADDRNOTAVAIL; + eth_hw_addr_random(card->dev); + +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; + u8 old_addr[ETH_ALEN]; + int rc = 0; + + QETH_CARD_TEXT(card, 3, "setmac"); + + 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, ETH_ALEN); + if (!is_valid_ether_addr(addr->sa_data)) + return -EADDRNOTAVAIL; + + if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) { + QETH_CARD_TEXT(card, 3, "setmcREC"); + return -ERESTARTSYS; + } + + /* avoid racing against concurrent state change: */ + if (!mutex_trylock(&card->conf_mutex)) + return -EAGAIN; + + if (!qeth_card_hw_is_reachable(card)) { + ether_addr_copy(dev->dev_addr, addr->sa_data); + goto out_unlock; + } + + /* don't register the same address twice */ + if (ether_addr_equal_64bits(dev->dev_addr, addr->sa_data) && + (card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED)) + goto out_unlock; + + /* add the new address, switch over, drop the old */ + rc = qeth_l2_send_setmac(card, addr->sa_data); + if (rc) + goto out_unlock; + ether_addr_copy(old_addr, dev->dev_addr); + ether_addr_copy(dev->dev_addr, addr->sa_data); + + if (card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED) + qeth_l2_remove_mac(card, old_addr); + card->info.mac_bits |= QETH_LAYER2_MAC_REGISTERED; + +out_unlock: + mutex_unlock(&card->conf_mutex); + return rc; +} + +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) +{ + 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 (ether_addr_equal_64bits(ha->addr, mac->mac_addr)) { + mac->disp_flag = QETH_DISP_ADDR_DO_NOTHING; + return; + } + } + + mac = kzalloc(sizeof(struct qeth_mac), GFP_ATOMIC); + if (!mac) + return; + + ether_addr_copy(mac->mac_addr, ha->addr); + 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); + netdev_for_each_uc_addr(ha, dev) + qeth_l2_add_mac(card, ha); + + hash_for_each_safe(card->mac_htable, i, tmp, mac, hnode) { + switch (mac->disp_flag) { + case QETH_DISP_ADDR_DELETE: + qeth_l2_remove_mac(card, mac->mac_addr); + hash_del(&mac->hnode); + kfree(mac); + break; + case QETH_DISP_ADDR_ADD: + rc = qeth_l2_write_mac(card, mac->mac_addr); + if (rc) { + hash_del(&mac->hnode); + kfree(mac); + break; + } + /* fall through */ + default: + /* for next call to set_rx_mode(): */ + 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(struct qeth_card *card, struct sk_buff *skb, + struct qeth_qdio_out_q *queue, int cast_type, int ipv) +{ + const unsigned int proto_len = IS_IQD(card) ? ETH_HLEN : 0; + const unsigned int hw_hdr_len = sizeof(struct qeth_hdr); + unsigned int frame_len = skb->len; + unsigned int data_offset = 0; + struct qeth_hdr *hdr = NULL; + unsigned int hd_len = 0; + unsigned int elements; + int push_len, rc; + bool is_sg; + + rc = skb_cow_head(skb, hw_hdr_len); + if (rc) + return rc; + + push_len = qeth_add_hw_header(card, skb, &hdr, hw_hdr_len, proto_len, + &elements); + if (push_len < 0) + return push_len; + if (!push_len) { + /* HW header needs its own buffer element. */ + hd_len = hw_hdr_len + proto_len; + data_offset = proto_len; + } + qeth_l2_fill_header(hdr, skb, cast_type, frame_len); + if (skb->ip_summed == CHECKSUM_PARTIAL) { + qeth_tx_csum(skb, &hdr->hdr.l2.flags[1], ipv); + if (card->options.performance_stats) + card->perf_stats.tx_csum++; + } + + is_sg = skb_is_nonlinear(skb); + if (IS_IQD(card)) { + rc = qeth_do_send_packet_fast(queue, skb, hdr, data_offset, + hd_len); + } else { + /* TODO: drop skb_orphan() once TX completion is fast enough */ + skb_orphan(skb); + rc = qeth_do_send_packet(card, queue, skb, hdr, data_offset, + hd_len, elements); + } + + if (!rc) { + if (card->options.performance_stats) { + card->perf_stats.buf_elements_sent += elements; + if (is_sg) + card->perf_stats.sg_skbs_sent++; + } + } else { + if (!push_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); + int ipv = qeth_get_ip_version(skb); + struct qeth_qdio_out_q *queue; + int tx_bytes = skb->len; + int rc; + + if ((card->state != CARD_STATE_UP) || !card->lan_online) { + card->stats.tx_carrier_errors++; + goto tx_drop; + } + + queue = qeth_get_tx_queue(card, skb, ipv, cast_type); + + if (card->options.performance_stats) { + card->perf_stats.outbound_cnt++; + card->perf_stats.outbound_start_time = qeth_get_micros(); + } + netif_stop_queue(dev); + + if (IS_OSN(card)) + rc = qeth_l2_xmit_osn(card, skb, queue); + else + rc = qeth_l2_xmit(card, skb, queue, cast_type, ipv); + + 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; + qeth_l2_vnicc_set_defaults(card); + 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); + + cancel_work_sync(&card->close_dev_work); + if (qeth_netdev_is_registered(card->dev)) + unregister_netdev(card->dev); +} + +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_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) +{ + int rc; + + if (qeth_netdev_is_registered(card->dev)) + return 0; + + card->dev->priv_flags |= IFF_UNICAST_FLT; + 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->needed_headroom = sizeof(struct qeth_hdr); + } + + if (card->info.type == QETH_CARD_TYPE_OSM) + card->dev->features |= NETIF_F_VLAN_CHALLENGED; + else + card->dev->features |= NETIF_F_HW_VLAN_CTAG_FILTER; + + if (card->info.type == QETH_CARD_TYPE_OSD && !card->info.guestlan) { + 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_supported6(card, IPA_OUTBOUND_CHECKSUM_V6)) { + card->dev->hw_features |= NETIF_F_IPV6_CSUM; + card->dev->vlan_features |= NETIF_F_IPV6_CSUM; + } + if (qeth_is_supported(card, IPA_INBOUND_CHECKSUM) || + qeth_is_supported6(card, IPA_INBOUND_CHECKSUM_V6)) { + card->dev->hw_features |= NETIF_F_RXCSUM; + card->dev->vlan_features |= NETIF_F_RXCSUM; + } + + qeth_l2_request_initial_mac(card); + netif_napi_add(card->dev, &card->napi, qeth_poll, QETH_NAPI_WEIGHT); + rc = register_netdev(card->dev); + if (rc) + card->dev->netdev_ops = NULL; + return rc; +} + +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) +{ + /* Set BridgePort features */ + QETH_CARD_TEXT(card, 2, "featuSBP"); + QETH_CARD_HEX(card, 2, &card->options.sbp.supported_funcs, + sizeof(card->options.sbp.supported_funcs)); + /* VNIC Characteristics features */ + QETH_CARD_TEXT(card, 2, "feaVNICC"); + QETH_CARD_HEX(card, 2, &card->options.vnicc.sup_chars, + sizeof(card->options.vnicc.sup_chars)); +} + +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"); + + rc = qeth_l2_setup_netdev(card); + if (rc) + goto out_remove; + + if (card->info.type != QETH_CARD_TYPE_OSN && + !qeth_l2_send_setmac(card, card->dev->dev_addr)) + card->info.mac_bits |= QETH_LAYER2_MAC_REGISTERED; + + 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; + + /* for the rx_bcast characteristic, init VNICC after setmac */ + qeth_l2_vnicc_init(card); + + qeth_trace_features(card); + qeth_l2_trace_features(card); + + qeth_l2_setup_bridgeport_attrs(card); + + card->state = CARD_STATE_HARDSETUP; + 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) + 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); + + qeth_enable_hw_features(card->dev); + if (recover_flag == CARD_STATE_RECOVER) { + if (recovery_mode && + card->info.type != QETH_CARD_TYPE_OSN) { + __qeth_l2_open(card->dev); + qeth_l2_set_rx_mode(card->dev); + } else { + rtnl_lock(); + dev_open(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 *)); + + 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); + + 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); + 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, + .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) +{ + struct qeth_channel *channel = iob->channel; + unsigned long flags; + int rc = 0; + + QETH_CARD_TEXT(card, 5, "osndctrd"); + + wait_event(card->wait_q, + atomic_cmpxchg(&channel->irq_pending, 0, 1) == 0); + qeth_prepare_control_data(card, len, iob); + QETH_CARD_TEXT(card, 6, "osnoirqp"); + spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags); + rc = ccw_device_start_timeout(channel->ccwdev, channel->ccw, + (addr_t) iob, 0, 0, QETH_IPA_TIMEOUT); + spin_unlock_irqrestore(get_ccwdev_lock(channel->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(channel, iob); + atomic_set(&channel->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); + 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; + + 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(__ipa_cmd(iob), data, data_len); + return qeth_osn_send_ipa_cmd(card, iob, data_len); +} +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" : + "<INVALID>"); + 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" : + "<INVALID>"); + 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 = __ipa_cmd(iob); + 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); +} + +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); +} + +static bool qeth_bridgeport_is_in_use(struct qeth_card *card) +{ + return (card->options.sbp.role || card->options.sbp.reflect_promisc || + card->options.sbp.hostnotification); +} + +/* VNIC Characteristics support */ + +/* handle VNICC IPA command return codes; convert to error codes */ +static int qeth_l2_vnicc_makerc(struct qeth_card *card, int ipa_rc) +{ + int rc; + + switch (ipa_rc) { + case IPA_RC_SUCCESS: + return ipa_rc; + case IPA_RC_L2_UNSUPPORTED_CMD: + case IPA_RC_NOTSUPP: + rc = -EOPNOTSUPP; + break; + case IPA_RC_VNICC_OOSEQ: + rc = -EALREADY; + break; + case IPA_RC_VNICC_VNICBP: + rc = -EBUSY; + break; + case IPA_RC_L2_ADDR_TABLE_FULL: + rc = -ENOSPC; + break; + case IPA_RC_L2_MAC_NOT_AUTH_BY_ADP: + rc = -EACCES; + break; + default: + rc = -EIO; + } + + QETH_CARD_TEXT_(card, 2, "err%04x", ipa_rc); + return rc; +} + +/* generic VNICC request call back control */ +struct _qeth_l2_vnicc_request_cbctl { + u32 sub_cmd; + struct { + u32 vnic_char; + u32 timeout; + } param; + struct { + union{ + u32 *sup_cmds; + u32 *timeout; + }; + } result; +}; + +/* generic VNICC request call back */ +static int qeth_l2_vnicc_request_cb(struct qeth_card *card, + struct qeth_reply *reply, + unsigned long data) +{ + struct _qeth_l2_vnicc_request_cbctl *cbctl = + (struct _qeth_l2_vnicc_request_cbctl *) reply->param; + struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data; + struct qeth_ipacmd_vnicc *rep = &cmd->data.vnicc; + + QETH_CARD_TEXT(card, 2, "vniccrcb"); + if (cmd->hdr.return_code) + return 0; + /* return results to caller */ + card->options.vnicc.sup_chars = rep->hdr.sup; + card->options.vnicc.cur_chars = rep->hdr.cur; + + if (cbctl->sub_cmd == IPA_VNICC_QUERY_CMDS) + *cbctl->result.sup_cmds = rep->query_cmds.sup_cmds; + + if (cbctl->sub_cmd == IPA_VNICC_GET_TIMEOUT) + *cbctl->result.timeout = rep->getset_timeout.timeout; + + return 0; +} + +/* generic VNICC request */ +static int qeth_l2_vnicc_request(struct qeth_card *card, + struct _qeth_l2_vnicc_request_cbctl *cbctl) +{ + struct qeth_ipacmd_vnicc *req; + struct qeth_cmd_buffer *iob; + struct qeth_ipa_cmd *cmd; + int rc; + + QETH_CARD_TEXT(card, 2, "vniccreq"); + + /* get new buffer for request */ + iob = qeth_get_ipacmd_buffer(card, IPA_CMD_VNICC, 0); + if (!iob) + return -ENOMEM; + + /* create header for request */ + cmd = __ipa_cmd(iob); + req = &cmd->data.vnicc; + + /* create sub command header for request */ + req->sub_hdr.data_length = sizeof(req->sub_hdr); + req->sub_hdr.sub_command = cbctl->sub_cmd; + + /* create sub command specific request fields */ + switch (cbctl->sub_cmd) { + case IPA_VNICC_QUERY_CHARS: + break; + case IPA_VNICC_QUERY_CMDS: + req->sub_hdr.data_length += sizeof(req->query_cmds); + req->query_cmds.vnic_char = cbctl->param.vnic_char; + break; + case IPA_VNICC_ENABLE: + case IPA_VNICC_DISABLE: + req->sub_hdr.data_length += sizeof(req->set_char); + req->set_char.vnic_char = cbctl->param.vnic_char; + break; + case IPA_VNICC_SET_TIMEOUT: + req->getset_timeout.timeout = cbctl->param.timeout; + /* fallthrough */ + case IPA_VNICC_GET_TIMEOUT: + req->sub_hdr.data_length += sizeof(req->getset_timeout); + req->getset_timeout.vnic_char = cbctl->param.vnic_char; + break; + default: + qeth_release_buffer(iob->channel, iob); + return -EOPNOTSUPP; + } + + /* send request */ + rc = qeth_send_ipa_cmd(card, iob, qeth_l2_vnicc_request_cb, + (void *) cbctl); + + return qeth_l2_vnicc_makerc(card, rc); +} + +/* VNICC query VNIC characteristics request */ +static int qeth_l2_vnicc_query_chars(struct qeth_card *card) +{ + struct _qeth_l2_vnicc_request_cbctl cbctl; + + /* prepare callback control */ + cbctl.sub_cmd = IPA_VNICC_QUERY_CHARS; + + QETH_CARD_TEXT(card, 2, "vniccqch"); + return qeth_l2_vnicc_request(card, &cbctl); +} + +/* VNICC query sub commands request */ +static int qeth_l2_vnicc_query_cmds(struct qeth_card *card, u32 vnic_char, + u32 *sup_cmds) +{ + struct _qeth_l2_vnicc_request_cbctl cbctl; + + /* prepare callback control */ + cbctl.sub_cmd = IPA_VNICC_QUERY_CMDS; + cbctl.param.vnic_char = vnic_char; + cbctl.result.sup_cmds = sup_cmds; + + QETH_CARD_TEXT(card, 2, "vniccqcm"); + return qeth_l2_vnicc_request(card, &cbctl); +} + +/* VNICC enable/disable characteristic request */ +static int qeth_l2_vnicc_set_char(struct qeth_card *card, u32 vnic_char, + u32 cmd) +{ + struct _qeth_l2_vnicc_request_cbctl cbctl; + + /* prepare callback control */ + cbctl.sub_cmd = cmd; + cbctl.param.vnic_char = vnic_char; + + QETH_CARD_TEXT(card, 2, "vniccedc"); + return qeth_l2_vnicc_request(card, &cbctl); +} + +/* VNICC get/set timeout for characteristic request */ +static int qeth_l2_vnicc_getset_timeout(struct qeth_card *card, u32 vnicc, + u32 cmd, u32 *timeout) +{ + struct _qeth_l2_vnicc_request_cbctl cbctl; + + /* prepare callback control */ + cbctl.sub_cmd = cmd; + cbctl.param.vnic_char = vnicc; + if (cmd == IPA_VNICC_SET_TIMEOUT) + cbctl.param.timeout = *timeout; + if (cmd == IPA_VNICC_GET_TIMEOUT) + cbctl.result.timeout = timeout; + + QETH_CARD_TEXT(card, 2, "vniccgst"); + return qeth_l2_vnicc_request(card, &cbctl); +} + +/* set current VNICC flag state; called from sysfs store function */ +int qeth_l2_vnicc_set_state(struct qeth_card *card, u32 vnicc, bool state) +{ + int rc = 0; + u32 cmd; + + QETH_CARD_TEXT(card, 2, "vniccsch"); + + /* check if characteristic and enable/disable are supported */ + if (!(card->options.vnicc.sup_chars & vnicc) || + !(card->options.vnicc.set_char_sup & vnicc)) + return -EOPNOTSUPP; + + if (qeth_bridgeport_is_in_use(card)) + return -EBUSY; + + /* set enable/disable command and store wanted characteristic */ + if (state) { + cmd = IPA_VNICC_ENABLE; + card->options.vnicc.wanted_chars |= vnicc; + } else { + cmd = IPA_VNICC_DISABLE; + card->options.vnicc.wanted_chars &= ~vnicc; + } + + /* do we need to do anything? */ + if (card->options.vnicc.cur_chars == card->options.vnicc.wanted_chars) + return rc; + + /* if card is not ready, simply stop here */ + if (!qeth_card_hw_is_reachable(card)) { + if (state) + card->options.vnicc.cur_chars |= vnicc; + else + card->options.vnicc.cur_chars &= ~vnicc; + return rc; + } + + rc = qeth_l2_vnicc_set_char(card, vnicc, cmd); + if (rc) + card->options.vnicc.wanted_chars = + card->options.vnicc.cur_chars; + else { + /* successful online VNICC change; handle special cases */ + if (state && vnicc == QETH_VNICC_RX_BCAST) + card->options.vnicc.rx_bcast_enabled = true; + if (!state && vnicc == QETH_VNICC_LEARNING) + qeth_l2_vnicc_recover_timeout(card, vnicc, + &card->options.vnicc.learning_timeout); + } + + return rc; +} + +/* get current VNICC flag state; called from sysfs show function */ +int qeth_l2_vnicc_get_state(struct qeth_card *card, u32 vnicc, bool *state) +{ + int rc = 0; + + QETH_CARD_TEXT(card, 2, "vniccgch"); + + /* check if characteristic is supported */ + if (!(card->options.vnicc.sup_chars & vnicc)) + return -EOPNOTSUPP; + + if (qeth_bridgeport_is_in_use(card)) + return -EBUSY; + + /* if card is ready, query current VNICC state */ + if (qeth_card_hw_is_reachable(card)) + rc = qeth_l2_vnicc_query_chars(card); + + *state = (card->options.vnicc.cur_chars & vnicc) ? true : false; + return rc; +} + +/* set VNICC timeout; called from sysfs store function. Currently, only learning + * supports timeout + */ +int qeth_l2_vnicc_set_timeout(struct qeth_card *card, u32 timeout) +{ + int rc = 0; + + QETH_CARD_TEXT(card, 2, "vniccsto"); + + /* check if characteristic and set_timeout are supported */ + if (!(card->options.vnicc.sup_chars & QETH_VNICC_LEARNING) || + !(card->options.vnicc.getset_timeout_sup & QETH_VNICC_LEARNING)) + return -EOPNOTSUPP; + + if (qeth_bridgeport_is_in_use(card)) + return -EBUSY; + + /* do we need to do anything? */ + if (card->options.vnicc.learning_timeout == timeout) + return rc; + + /* if card is not ready, simply store the value internally and return */ + if (!qeth_card_hw_is_reachable(card)) { + card->options.vnicc.learning_timeout = timeout; + return rc; + } + + /* send timeout value to card; if successful, store value internally */ + rc = qeth_l2_vnicc_getset_timeout(card, QETH_VNICC_LEARNING, + IPA_VNICC_SET_TIMEOUT, &timeout); + if (!rc) + card->options.vnicc.learning_timeout = timeout; + + return rc; +} + +/* get current VNICC timeout; called from sysfs show function. Currently, only + * learning supports timeout + */ +int qeth_l2_vnicc_get_timeout(struct qeth_card *card, u32 *timeout) +{ + int rc = 0; + + QETH_CARD_TEXT(card, 2, "vniccgto"); + + /* check if characteristic and get_timeout are supported */ + if (!(card->options.vnicc.sup_chars & QETH_VNICC_LEARNING) || + !(card->options.vnicc.getset_timeout_sup & QETH_VNICC_LEARNING)) + return -EOPNOTSUPP; + + if (qeth_bridgeport_is_in_use(card)) + return -EBUSY; + + /* if card is ready, get timeout. Otherwise, just return stored value */ + *timeout = card->options.vnicc.learning_timeout; + if (qeth_card_hw_is_reachable(card)) + rc = qeth_l2_vnicc_getset_timeout(card, QETH_VNICC_LEARNING, + IPA_VNICC_GET_TIMEOUT, + timeout); + + return rc; +} + +/* check if VNICC is currently enabled */ +bool qeth_l2_vnicc_is_in_use(struct qeth_card *card) +{ + if (!card->options.vnicc.sup_chars) + return false; + /* default values are only OK if rx_bcast was not enabled by user + * or the card is offline. + */ + if (card->options.vnicc.cur_chars == QETH_VNICC_DEFAULT) { + if (!card->options.vnicc.rx_bcast_enabled || + !qeth_card_hw_is_reachable(card)) + return false; + } + return true; +} + +/* recover user timeout setting */ +static bool qeth_l2_vnicc_recover_timeout(struct qeth_card *card, u32 vnicc, + u32 *timeout) +{ + if (card->options.vnicc.sup_chars & vnicc && + card->options.vnicc.getset_timeout_sup & vnicc && + !qeth_l2_vnicc_getset_timeout(card, vnicc, IPA_VNICC_SET_TIMEOUT, + timeout)) + return false; + *timeout = QETH_VNICC_DEFAULT_TIMEOUT; + return true; +} + +/* recover user characteristic setting */ +static bool qeth_l2_vnicc_recover_char(struct qeth_card *card, u32 vnicc, + bool enable) +{ + u32 cmd = enable ? IPA_VNICC_ENABLE : IPA_VNICC_DISABLE; + + if (card->options.vnicc.sup_chars & vnicc && + card->options.vnicc.set_char_sup & vnicc && + !qeth_l2_vnicc_set_char(card, vnicc, cmd)) + return false; + card->options.vnicc.wanted_chars &= ~vnicc; + card->options.vnicc.wanted_chars |= QETH_VNICC_DEFAULT & vnicc; + return true; +} + +/* (re-)initialize VNICC */ +static void qeth_l2_vnicc_init(struct qeth_card *card) +{ + u32 *timeout = &card->options.vnicc.learning_timeout; + bool enable, error = false; + unsigned int chars_len, i; + unsigned long chars_tmp; + u32 sup_cmds, vnicc; + + QETH_CARD_TEXT(card, 2, "vniccini"); + /* reset rx_bcast */ + card->options.vnicc.rx_bcast_enabled = 0; + /* initial query and storage of VNIC characteristics */ + if (qeth_l2_vnicc_query_chars(card)) { + if (card->options.vnicc.wanted_chars != QETH_VNICC_DEFAULT || + *timeout != QETH_VNICC_DEFAULT_TIMEOUT) + dev_err(&card->gdev->dev, "Configuring the VNIC characteristics failed\n"); + /* fail quietly if user didn't change the default config */ + card->options.vnicc.sup_chars = 0; + card->options.vnicc.cur_chars = 0; + card->options.vnicc.wanted_chars = QETH_VNICC_DEFAULT; + return; + } + /* get supported commands for each supported characteristic */ + chars_tmp = card->options.vnicc.sup_chars; + chars_len = sizeof(card->options.vnicc.sup_chars) * BITS_PER_BYTE; + for_each_set_bit(i, &chars_tmp, chars_len) { + vnicc = BIT(i); + if (qeth_l2_vnicc_query_cmds(card, vnicc, &sup_cmds)) { + sup_cmds = 0; + error = true; + } + if ((sup_cmds & IPA_VNICC_SET_TIMEOUT) && + (sup_cmds & IPA_VNICC_GET_TIMEOUT)) + card->options.vnicc.getset_timeout_sup |= vnicc; + else + card->options.vnicc.getset_timeout_sup &= ~vnicc; + if ((sup_cmds & IPA_VNICC_ENABLE) && + (sup_cmds & IPA_VNICC_DISABLE)) + card->options.vnicc.set_char_sup |= vnicc; + else + card->options.vnicc.set_char_sup &= ~vnicc; + } + /* enforce assumed default values and recover settings, if changed */ + error |= qeth_l2_vnicc_recover_timeout(card, QETH_VNICC_LEARNING, + timeout); + chars_tmp = card->options.vnicc.wanted_chars ^ QETH_VNICC_DEFAULT; + chars_len = sizeof(card->options.vnicc.wanted_chars) * BITS_PER_BYTE; + for_each_set_bit(i, &chars_tmp, chars_len) { + vnicc = BIT(i); + enable = card->options.vnicc.wanted_chars & vnicc; + error |= qeth_l2_vnicc_recover_char(card, vnicc, enable); + } + if (error) + dev_err(&card->gdev->dev, "Configuring the VNIC characteristics failed\n"); +} + +/* configure default values of VNIC characteristics */ +static void qeth_l2_vnicc_set_defaults(struct qeth_card *card) +{ + /* characteristics values */ + card->options.vnicc.sup_chars = QETH_VNICC_ALL; + card->options.vnicc.cur_chars = QETH_VNICC_DEFAULT; + card->options.vnicc.learning_timeout = QETH_VNICC_DEFAULT_TIMEOUT; + /* supported commands */ + card->options.vnicc.set_char_sup = QETH_VNICC_ALL; + card->options.vnicc.getset_timeout_sup = QETH_VNICC_LEARNING; + /* settings wanted by users */ + card->options.vnicc.wanted_chars = QETH_VNICC_DEFAULT; +} + +module_init(qeth_l2_init); +module_exit(qeth_l2_exit); +MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>"); +MODULE_DESCRIPTION("qeth layer 2 discipline"); +MODULE_LICENSE("GPL"); |