diff options
Diffstat (limited to 'drivers/s390/net/qeth_l2_main.c')
| -rw-r--r-- | drivers/s390/net/qeth_l2_main.c | 1242 |
1 files changed, 1242 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 000000000000..4417a3629ae0 --- /dev/null +++ b/drivers/s390/net/qeth_l2_main.c @@ -0,0 +1,1242 @@ +/* + * drivers/s390/net/qeth_l2_main.c + * + * Copyright IBM Corp. 2007 + * 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> + */ + +#include <linux/module.h> +#include <linux/moduleparam.h> +#include <linux/string.h> +#include <linux/errno.h> +#include <linux/kernel.h> +#include <linux/etherdevice.h> +#include <linux/mii.h> +#include <linux/ip.h> + +#include <asm/s390_rdev.h> + +#include "qeth_core.h" +#include "qeth_core_offl.h" + +#define QETH_DBF_TEXT_(name, level, text...) \ + do { \ + if (qeth_dbf_passes(qeth_dbf_##name, level)) { \ + char *dbf_txt_buf = get_cpu_var(qeth_l2_dbf_txt_buf); \ + sprintf(dbf_txt_buf, text); \ + debug_text_event(qeth_dbf_##name, level, dbf_txt_buf); \ + put_cpu_var(qeth_l2_dbf_txt_buf); \ + } \ + } while (0) + +static DEFINE_PER_CPU(char[256], qeth_l2_dbf_txt_buf); + +static int qeth_l2_set_offline(struct ccwgroup_device *); +static int qeth_l2_stop(struct net_device *); +static int qeth_l2_send_delmac(struct qeth_card *, __u8 *); +static int qeth_l2_send_setdelmac(struct qeth_card *, __u8 *, + enum qeth_ipa_cmds, + int (*reply_cb) (struct qeth_card *, + struct qeth_reply*, + unsigned long)); +static void qeth_l2_set_multicast_list(struct net_device *); +static int qeth_l2_recover(void *); + +static int qeth_l2_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd) +{ + struct qeth_card *card = netdev_priv(dev); + struct mii_ioctl_data *mii_data; + int rc = 0; + + if (!card) + return -ENODEV; + + if ((card->state != CARD_STATE_UP) && + (card->state != CARD_STATE_SOFTSETUP)) + return -ENODEV; + + if (card->info.type == QETH_CARD_TYPE_OSN) + return -EPERM; + + switch (cmd) { + case SIOC_QETH_ADP_SET_SNMP_CONTROL: + rc = qeth_snmp_command(card, rq->ifr_ifru.ifru_data); + break; + case SIOC_QETH_GET_CARD_TYPE: + if ((card->info.type == QETH_CARD_TYPE_OSAE) && + !card->info.guestlan) + return 1; + return 0; + break; + case SIOCGMIIPHY: + mii_data = if_mii(rq); + mii_data->phy_id = 0; + break; + case SIOCGMIIREG: + mii_data = if_mii(rq); + if (mii_data->phy_id != 0) + rc = -EINVAL; + else + mii_data->val_out = qeth_mdio_read(dev, + mii_data->phy_id, mii_data->reg_num); + break; + default: + rc = -EOPNOTSUPP; + } + if (rc) + QETH_DBF_TEXT_(trace, 2, "ioce%d", rc); + return rc; +} + +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; + unsigned char *readno; + __u16 temp_dev_no, card_dev_no; + char *endp; + unsigned long flags; + + 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) { + readno = CARD_RDEV_ID(card); + readno += (strlen(readno) - 4); + card_dev_no = simple_strtoul(readno, &endp, 16); + if (card_dev_no == temp_dev_no) { + ndev = card->dev; + break; + } + } + read_unlock_irqrestore(&qeth_core_card_list.rwlock, flags); + return ndev; +} + +static int qeth_l2_send_setgroupmac_cb(struct qeth_card *card, + struct qeth_reply *reply, + unsigned long data) +{ + struct qeth_ipa_cmd *cmd; + __u8 *mac; + + QETH_DBF_TEXT(trace, 2, "L2Sgmacb"); + cmd = (struct qeth_ipa_cmd *) data; + mac = &cmd->data.setdelmac.mac[0]; + /* MAC already registered, needed in couple/uncouple case */ + if (cmd->hdr.return_code == 0x2005) { + PRINT_WARN("Group MAC %02x:%02x:%02x:%02x:%02x:%02x " \ + "already existing on %s \n", + mac[0], mac[1], mac[2], mac[3], mac[4], mac[5], + QETH_CARD_IFNAME(card)); + cmd->hdr.return_code = 0; + } + if (cmd->hdr.return_code) + PRINT_ERR("Could not set group MAC " \ + "%02x:%02x:%02x:%02x:%02x:%02x on %s: %x\n", + mac[0], mac[1], mac[2], mac[3], mac[4], mac[5], + QETH_CARD_IFNAME(card), cmd->hdr.return_code); + return 0; +} + +static int qeth_l2_send_setgroupmac(struct qeth_card *card, __u8 *mac) +{ + QETH_DBF_TEXT(trace, 2, "L2Sgmac"); + return qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETGMAC, + qeth_l2_send_setgroupmac_cb); +} + +static int qeth_l2_send_delgroupmac_cb(struct qeth_card *card, + struct qeth_reply *reply, + unsigned long data) +{ + struct qeth_ipa_cmd *cmd; + __u8 *mac; + + QETH_DBF_TEXT(trace, 2, "L2Dgmacb"); + cmd = (struct qeth_ipa_cmd *) data; + mac = &cmd->data.setdelmac.mac[0]; + if (cmd->hdr.return_code) + PRINT_ERR("Could not delete group MAC " \ + "%02x:%02x:%02x:%02x:%02x:%02x on %s: %x\n", + mac[0], mac[1], mac[2], mac[3], mac[4], mac[5], + QETH_CARD_IFNAME(card), cmd->hdr.return_code); + return 0; +} + +static int qeth_l2_send_delgroupmac(struct qeth_card *card, __u8 *mac) +{ + QETH_DBF_TEXT(trace, 2, "L2Dgmac"); + return qeth_l2_send_setdelmac(card, mac, IPA_CMD_DELGMAC, + qeth_l2_send_delgroupmac_cb); +} + +static void qeth_l2_add_mc(struct qeth_card *card, __u8 *mac) +{ + struct qeth_mc_mac *mc; + + mc = kmalloc(sizeof(struct qeth_mc_mac), GFP_ATOMIC); + + if (!mc) { + PRINT_ERR("no mem vor mc mac address\n"); + return; + } + + memcpy(mc->mc_addr, mac, OSA_ADDR_LEN); + mc->mc_addrlen = OSA_ADDR_LEN; + + if (!qeth_l2_send_setgroupmac(card, mac)) + list_add_tail(&mc->list, &card->mc_list); + else + kfree(mc); +} + +static void qeth_l2_del_all_mc(struct qeth_card *card) +{ + struct qeth_mc_mac *mc, *tmp; + + spin_lock_bh(&card->mclock); + list_for_each_entry_safe(mc, tmp, &card->mc_list, list) { + qeth_l2_send_delgroupmac(card, mc->mc_addr); + list_del(&mc->list); + kfree(mc); + } + spin_unlock_bh(&card->mclock); +} + +static void qeth_l2_get_packet_type(struct qeth_card *card, + struct qeth_hdr *hdr, struct sk_buff *skb) +{ + __u16 hdr_mac; + + if (!memcmp(skb->data + QETH_HEADER_SIZE, + skb->dev->broadcast, 6)) { + /* broadcast? */ + hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_BROADCAST; + return; + } + hdr_mac = *((__u16 *)skb->data); + /* tr multicast? */ + switch (card->info.link_type) { + case QETH_LINK_TYPE_HSTR: + case QETH_LINK_TYPE_LANE_TR: + if ((hdr_mac == QETH_TR_MAC_NC) || + (hdr_mac == QETH_TR_MAC_C)) + hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_MULTICAST; + else + hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_UNICAST; + break; + /* eth or so multicast? */ + default: + if ((hdr_mac == QETH_ETH_MAC_V4) || + (hdr_mac == QETH_ETH_MAC_V6)) + hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_MULTICAST; + else + hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_UNICAST; + } +} + +static void qeth_l2_fill_header(struct qeth_card *card, struct qeth_hdr *hdr, + struct sk_buff *skb, int ipv, int cast_type) +{ + struct vlan_ethhdr *veth = (struct vlan_ethhdr *)((skb->data) + + QETH_HEADER_SIZE); + + memset(hdr, 0, sizeof(struct qeth_hdr)); + hdr->hdr.l2.id = QETH_HEADER_TYPE_LAYER2; + + /* 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 + qeth_l2_get_packet_type(card, hdr, skb); + + hdr->hdr.l2.pkt_length = skb->len-QETH_HEADER_SIZE; + /* 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_DBF_TEXT(trace, 2, "L2sdvcb"); + cmd = (struct qeth_ipa_cmd *) data; + if (cmd->hdr.return_code) { + PRINT_ERR("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_DBF_TEXT_(trace, 2, "L2VL%4x", cmd->hdr.command); + QETH_DBF_TEXT_(trace, 2, "L2%s", CARD_BUS_ID(card)); + QETH_DBF_TEXT_(trace, 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_DBF_TEXT_(trace, 4, "L2sdv%x", ipacmd); + iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4); + 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, int clear) +{ + struct qeth_vlan_vid *id; + QETH_DBF_TEXT(trace, 3, "L2prcvln"); + spin_lock_bh(&card->vlanlock); + list_for_each_entry(id, &card->vid_list, list) { + if (clear) + qeth_l2_send_setdelvlan(card, id->vid, + IPA_CMD_DELVLAN); + else + qeth_l2_send_setdelvlan(card, id->vid, + IPA_CMD_SETVLAN); + } + spin_unlock_bh(&card->vlanlock); +} + +static void qeth_l2_vlan_rx_add_vid(struct net_device *dev, unsigned short vid) +{ + struct qeth_card *card = netdev_priv(dev); + struct qeth_vlan_vid *id; + + QETH_DBF_TEXT_(trace, 4, "aid:%d", vid); + id = kmalloc(sizeof(struct qeth_vlan_vid), GFP_ATOMIC); + if (id) { + id->vid = vid; + qeth_l2_send_setdelvlan(card, vid, IPA_CMD_SETVLAN); + spin_lock_bh(&card->vlanlock); + list_add_tail(&id->list, &card->vid_list); + spin_unlock_bh(&card->vlanlock); + } else { + PRINT_ERR("no memory for vid\n"); + } +} + +static void qeth_l2_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid) +{ + struct qeth_vlan_vid *id, *tmpid = NULL; + struct qeth_card *card = netdev_priv(dev); + + QETH_DBF_TEXT_(trace, 4, "kid:%d", vid); + 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) { + qeth_l2_send_setdelvlan(card, vid, IPA_CMD_DELVLAN); + kfree(tmpid); + } + qeth_l2_set_multicast_list(card->dev); +} + +static int qeth_l2_stop_card(struct qeth_card *card, int recovery_mode) +{ + int rc = 0; + + QETH_DBF_TEXT(setup , 2, "stopcard"); + QETH_DBF_HEX(setup, 2, &card, sizeof(void *)); + + qeth_set_allowed_threads(card, 0, 1); + if (qeth_wait_for_threads(card, ~QETH_RECOVER_THREAD)) + return -ERESTARTSYS; + 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(); + } + if (!card->use_hard_stop) { + __u8 *mac = &card->dev->dev_addr[0]; + rc = qeth_l2_send_delmac(card, mac); + QETH_DBF_TEXT_(setup, 2, "Lerr%d", rc); + } + card->state = CARD_STATE_SOFTSETUP; + } + if (card->state == CARD_STATE_SOFTSETUP) { + qeth_l2_process_vlans(card, 1); + qeth_l2_del_all_mc(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); + } + card->use_hard_stop = 0; + return rc; +} + +static void qeth_l2_process_inbound_buffer(struct qeth_card *card, + struct qeth_qdio_buffer *buf, int index) +{ + struct qdio_buffer_element *element; + struct sk_buff *skb; + struct qeth_hdr *hdr; + int offset; + unsigned int len; + + /* get first element of current buffer */ + element = (struct qdio_buffer_element *)&buf->buffer->element[0]; + offset = 0; + if (card->options.performance_stats) + card->perf_stats.bufs_rec++; + while ((skb = qeth_core_get_next_skb(card, buf->buffer, &element, + &offset, &hdr))) { + skb->dev = card->dev; + /* is device UP ? */ + if (!(card->dev->flags & IFF_UP)) { + dev_kfree_skb_any(skb); + continue; + } + + 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->options.checksum_type == NO_CHECKSUMMING) + skb->ip_summed = CHECKSUM_UNNECESSARY; + else + skb->ip_summed = CHECKSUM_NONE; + *((__u32 *)skb->cb) = ++card->seqno.pkt_seqno; + len = skb->len; + netif_rx(skb); + break; + case QETH_HEADER_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; + default: + dev_kfree_skb_any(skb); + QETH_DBF_TEXT(trace, 3, "inbunkno"); + QETH_DBF_HEX(control, 3, hdr, QETH_DBF_CONTROL_LEN); + continue; + } + card->dev->last_rx = jiffies; + card->stats.rx_packets++; + card->stats.rx_bytes += len; + } +} + +static int qeth_l2_send_setdelmac(struct qeth_card *card, __u8 *mac, + enum qeth_ipa_cmds ipacmd, + int (*reply_cb) (struct qeth_card *, + struct qeth_reply*, + unsigned long)) +{ + struct qeth_ipa_cmd *cmd; + struct qeth_cmd_buffer *iob; + + QETH_DBF_TEXT(trace, 2, "L2sdmac"); + iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4); + 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_send_ipa_cmd(card, iob, reply_cb, NULL); +} + +static int qeth_l2_send_setmac_cb(struct qeth_card *card, + struct qeth_reply *reply, + unsigned long data) +{ + struct qeth_ipa_cmd *cmd; + + QETH_DBF_TEXT(trace, 2, "L2Smaccb"); + cmd = (struct qeth_ipa_cmd *) data; + if (cmd->hdr.return_code) { + QETH_DBF_TEXT_(trace, 2, "L2er%x", cmd->hdr.return_code); + card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED; + cmd->hdr.return_code = -EIO; + } else { + card->info.mac_bits |= QETH_LAYER2_MAC_REGISTERED; + memcpy(card->dev->dev_addr, cmd->data.setdelmac.mac, + OSA_ADDR_LEN); + PRINT_INFO("MAC address %2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x " + "successfully registered on device %s\n", + card->dev->dev_addr[0], card->dev->dev_addr[1], + card->dev->dev_addr[2], card->dev->dev_addr[3], + card->dev->dev_addr[4], card->dev->dev_addr[5], + card->dev->name); + } + return 0; +} + +static int qeth_l2_send_setmac(struct qeth_card *card, __u8 *mac) +{ + QETH_DBF_TEXT(trace, 2, "L2Setmac"); + return qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETVMAC, + qeth_l2_send_setmac_cb); +} + +static int qeth_l2_send_delmac_cb(struct qeth_card *card, + struct qeth_reply *reply, + unsigned long data) +{ + struct qeth_ipa_cmd *cmd; + + QETH_DBF_TEXT(trace, 2, "L2Dmaccb"); + cmd = (struct qeth_ipa_cmd *) data; + if (cmd->hdr.return_code) { + QETH_DBF_TEXT_(trace, 2, "err%d", cmd->hdr.return_code); + cmd->hdr.return_code = -EIO; + return 0; + } + card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED; + + return 0; +} + +static int qeth_l2_send_delmac(struct qeth_card *card, __u8 *mac) +{ + QETH_DBF_TEXT(trace, 2, "L2Delmac"); + if (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED)) + return 0; + return qeth_l2_send_setdelmac(card, mac, IPA_CMD_DELVMAC, + qeth_l2_send_delmac_cb); +} + +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, "doL2init"); + QETH_DBF_TEXT_(setup, 2, "doL2%s", CARD_BUS_ID(card)); + + rc = qeth_query_setadapterparms(card); + if (rc) { + PRINT_WARN("could not query adapter parameters on device %s: " + "x%x\n", CARD_BUS_ID(card), rc); + } + + if (card->info.guestlan) { + rc = qeth_setadpparms_change_macaddr(card); + if (rc) { + PRINT_WARN("couldn't get MAC address on " + "device %s: x%x\n", + CARD_BUS_ID(card), rc); + QETH_DBF_TEXT_(setup, 2, "1err%d", rc); + return rc; + } + QETH_DBF_HEX(setup, 2, card->dev->dev_addr, OSA_ADDR_LEN); + } else { + random_ether_addr(card->dev->dev_addr); + memcpy(card->dev->dev_addr, vendor_pre, 3); + } + return 0; +} + +static int qeth_l2_set_mac_address(struct net_device *dev, void *p) +{ + struct sockaddr *addr = p; + struct qeth_card *card = netdev_priv(dev); + int rc = 0; + + QETH_DBF_TEXT(trace, 3, "setmac"); + + if (qeth_l2_verify_dev(dev) != QETH_REAL_CARD) { + QETH_DBF_TEXT(trace, 3, "setmcINV"); + return -EOPNOTSUPP; + } + + if (card->info.type == QETH_CARD_TYPE_OSN) { + PRINT_WARN("Setting MAC address on %s is not supported.\n", + dev->name); + QETH_DBF_TEXT(trace, 3, "setmcOSN"); + return -EOPNOTSUPP; + } + QETH_DBF_TEXT_(trace, 3, "%s", CARD_BUS_ID(card)); + QETH_DBF_HEX(trace, 3, addr->sa_data, OSA_ADDR_LEN); + rc = qeth_l2_send_delmac(card, &card->dev->dev_addr[0]); + if (!rc) + rc = qeth_l2_send_setmac(card, addr->sa_data); + return rc; +} + +static void qeth_l2_set_multicast_list(struct net_device *dev) +{ + struct qeth_card *card = netdev_priv(dev); + struct dev_mc_list *dm; + + if (card->info.type == QETH_CARD_TYPE_OSN) + return ; + + QETH_DBF_TEXT(trace, 3, "setmulti"); + qeth_l2_del_all_mc(card); + spin_lock_bh(&card->mclock); + for (dm = dev->mc_list; dm; dm = dm->next) + qeth_l2_add_mc(card, dm->dmi_addr); + spin_unlock_bh(&card->mclock); + if (!qeth_adp_supported(card, IPA_SETADP_SET_PROMISC_MODE)) + return; + qeth_setadp_promisc_mode(card); +} + +static int qeth_l2_hard_start_xmit(struct sk_buff *skb, struct net_device *dev) +{ + int rc; + struct qeth_hdr *hdr = NULL; + int elements = 0; + struct qeth_card *card = netdev_priv(dev); + struct sk_buff *new_skb = skb; + int ipv = qeth_get_ip_version(skb); + int cast_type = qeth_get_cast_type(card, skb); + struct qeth_qdio_out_q *queue = card->qdio.out_qs + [qeth_get_priority_queue(card, skb, ipv, cast_type)]; + int tx_bytes = skb->len; + enum qeth_large_send_types large_send = QETH_LARGE_SEND_NO; + struct qeth_eddp_context *ctx = NULL; + + QETH_DBF_TEXT(trace, 6, "l2xmit"); + + if ((card->state != CARD_STATE_UP) || !card->lan_online) { + card->stats.tx_carrier_errors++; + goto tx_drop; + } + + if ((card->info.type == QETH_CARD_TYPE_OSN) && + (skb->protocol == htons(ETH_P_IPV6))) + 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); + + if (skb_is_gso(skb)) + large_send = QETH_LARGE_SEND_EDDP; + + if (card->info.type == QETH_CARD_TYPE_OSN) + hdr = (struct qeth_hdr *)skb->data; + else { + new_skb = qeth_prepare_skb(card, skb, &hdr); + if (!new_skb) + goto tx_drop; + qeth_l2_fill_header(card, hdr, new_skb, ipv, cast_type); + } + + if (large_send == QETH_LARGE_SEND_EDDP) { + ctx = qeth_eddp_create_context(card, new_skb, hdr, + skb->sk->sk_protocol); + if (ctx == NULL) { + PRINT_WARN("could not create eddp context\n"); + goto tx_drop; + } + } else { + elements = qeth_get_elements_no(card, (void *)hdr, new_skb, 0); + if (!elements) + goto tx_drop; + } + + if ((large_send == QETH_LARGE_SEND_NO) && + (skb->ip_summed == CHECKSUM_PARTIAL)) + qeth_tx_csum(new_skb); + + if (card->info.type != QETH_CARD_TYPE_IQD) + rc = qeth_do_send_packet(card, queue, new_skb, hdr, + elements, ctx); + else + rc = qeth_do_send_packet_fast(card, queue, new_skb, hdr, + elements, ctx); + if (!rc) { + card->stats.tx_packets++; + card->stats.tx_bytes += tx_bytes; + if (new_skb != skb) + dev_kfree_skb_any(skb); + if (card->options.performance_stats) { + if (large_send != QETH_LARGE_SEND_NO) { + card->perf_stats.large_send_bytes += tx_bytes; + card->perf_stats.large_send_cnt++; + } + if (skb_shinfo(new_skb)->nr_frags > 0) { + card->perf_stats.sg_skbs_sent++; + /* nr_frags + skb->data */ + card->perf_stats.sg_frags_sent += + skb_shinfo(new_skb)->nr_frags + 1; + } + } + + if (ctx != NULL) { + qeth_eddp_put_context(ctx); + dev_kfree_skb_any(new_skb); + } + } else { + if (ctx != NULL) + qeth_eddp_put_context(ctx); + + if (rc == -EBUSY) { + if (new_skb != skb) + dev_kfree_skb_any(new_skb); + return NETDEV_TX_BUSY; + } else + goto tx_drop; + } + + netif_wake_queue(dev); + if (card->options.performance_stats) + card->perf_stats.outbound_time += qeth_get_micros() - + card->perf_stats.outbound_start_time; + return rc; + +tx_drop: + card->stats.tx_dropped++; + card->stats.tx_errors++; + if ((new_skb != skb) && new_skb) + dev_kfree_skb_any(new_skb); + dev_kfree_skb_any(skb); + return NETDEV_TX_OK; +} + +static void qeth_l2_qdio_input_handler(struct ccw_device *ccwdev, + unsigned int status, unsigned int qdio_err, + unsigned int siga_err, unsigned int queue, + int first_element, int count, unsigned long card_ptr) +{ + struct net_device *net_dev; + struct qeth_card *card; + struct qeth_qdio_buffer *buffer; + int index; + int i; + + QETH_DBF_TEXT(trace, 6, "qdinput"); + card = (struct qeth_card *) card_ptr; + net_dev = card->dev; + if (card->options.performance_stats) { + card->perf_stats.inbound_cnt++; + card->perf_stats.inbound_start_time = qeth_get_micros(); + } + if (status & QDIO_STATUS_LOOK_FOR_ERROR) { + if (status & QDIO_STATUS_ACTIVATE_CHECK_CONDITION) { + QETH_DBF_TEXT(trace, 1, "qdinchk"); + QETH_DBF_TEXT_(trace, 1, "%s", CARD_BUS_ID(card)); + QETH_DBF_TEXT_(trace, 1, "%04X%04X", first_element, + count); + QETH_DBF_TEXT_(trace, 1, "%04X%04X", queue, status); + qeth_schedule_recovery(card); + return; + } + } + for (i = first_element; i < (first_element + count); ++i) { + index = i % QDIO_MAX_BUFFERS_PER_Q; + buffer = &card->qdio.in_q->bufs[index]; + if (!((status & QDIO_STATUS_LOOK_FOR_ERROR) && + qeth_check_qdio_errors(buffer->buffer, + qdio_err, siga_err, "qinerr"))) + qeth_l2_process_inbound_buffer(card, buffer, index); + /* clear buffer and give back to hardware */ + qeth_put_buffer_pool_entry(card, buffer->pool_entry); + qeth_queue_input_buffer(card, index); + } + if (card->options.performance_stats) + card->perf_stats.inbound_time += qeth_get_micros() - + card->perf_stats.inbound_start_time; +} + +static int qeth_l2_open(struct net_device *dev) +{ + struct qeth_card *card = netdev_priv(dev); + + QETH_DBF_TEXT(trace, 4, "qethopen"); + 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_DBF_TEXT(trace, 4, "nomacadr"); + return -EPERM; + } + card->data.state = CH_STATE_UP; + card->state = CARD_STATE_UP; + card->dev->flags |= IFF_UP; + netif_start_queue(dev); + + if (!card->lan_online && netif_carrier_ok(dev)) + netif_carrier_off(dev); + return 0; +} + + +static int qeth_l2_stop(struct net_device *dev) +{ + struct qeth_card *card = netdev_priv(dev); + + QETH_DBF_TEXT(trace, 4, "qethstop"); + netif_tx_disable(dev); + card->dev->flags &= ~IFF_UP; + if (card->state == CARD_STATE_UP) + card->state = CARD_STATE_SOFTSETUP; + return 0; +} + +static int qeth_l2_probe_device(struct ccwgroup_device *gdev) +{ + struct qeth_card *card = dev_get_drvdata(&gdev->dev); + + INIT_LIST_HEAD(&card->vid_list); + INIT_LIST_HEAD(&card->mc_list); + card->options.layer2 = 1; + card->discipline.input_handler = (qdio_handler_t *) + qeth_l2_qdio_input_handler; + card->discipline.output_handler = (qdio_handler_t *) + qeth_qdio_output_handler; + card->discipline.recover = qeth_l2_recover; + return 0; +} + +static void qeth_l2_remove_device(struct ccwgroup_device *cgdev) +{ + struct qeth_card *card = dev_get_drvdata(&cgdev->dev); + + wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0); + + if (cgdev->state == CCWGROUP_ONLINE) { + card->use_hard_stop = 1; + qeth_l2_set_offline(cgdev); + } + + if (card->dev) { + unregister_netdev(card->dev); + card->dev = NULL; + } + + qeth_l2_del_all_mc(card); + return; +} + +static struct ethtool_ops qeth_l2_ethtool_ops = { + .get_link = ethtool_op_get_link, + .get_tx_csum = ethtool_op_get_tx_csum, + .set_tx_csum = ethtool_op_set_tx_hw_csum, + .get_sg = ethtool_op_get_sg, + .set_sg = ethtool_op_set_sg, + .get_tso = ethtool_op_get_tso, + .set_tso = ethtool_op_set_tso, + .get_strings = qeth_core_get_strings, + .get_ethtool_stats = qeth_core_get_ethtool_stats, + .get_stats_count = qeth_core_get_stats_count, + .get_drvinfo = qeth_core_get_drvinfo, +}; + +static struct ethtool_ops qeth_l2_osn_ops = { + .get_strings = qeth_core_get_strings, + .get_ethtool_stats = qeth_core_get_ethtool_stats, + .get_stats_count = qeth_core_get_stats_count, + .get_drvinfo = qeth_core_get_drvinfo, +}; + +static int qeth_l2_setup_netdev(struct qeth_card *card) +{ + switch (card->info.type) { + case QETH_CARD_TYPE_OSAE: + card->dev = alloc_etherdev(0); + break; + case QETH_CARD_TYPE_IQD: + card->dev = alloc_netdev(0, "hsi%d", ether_setup); + break; + case QETH_CARD_TYPE_OSN: + card->dev = alloc_netdev(0, "osn%d", ether_setup); + card->dev->flags |= IFF_NOARP; + break; + default: + card->dev = alloc_etherdev(0); + } + + if (!card->dev) + return -ENODEV; + + card->dev->priv = card; + card->dev->tx_timeout = &qeth_tx_timeout; + card->dev->watchdog_timeo = QETH_TX_TIMEOUT; + card->dev->open = qeth_l2_open; + card->dev->stop = qeth_l2_stop; + card->dev->hard_start_xmit = qeth_l2_hard_start_xmit; + card->dev->do_ioctl = qeth_l2_do_ioctl; + card->dev->get_stats = qeth_get_stats; + card->dev->change_mtu = qeth_change_mtu; + card->dev->set_multicast_list = qeth_l2_set_multicast_list; + card->dev->vlan_rx_kill_vid = qeth_l2_vlan_rx_kill_vid; + card->dev->vlan_rx_add_vid = qeth_l2_vlan_rx_add_vid; + card->dev->set_mac_address = qeth_l2_set_mac_address; + card->dev->mtu = card->info.initial_mtu; + if (card->info.type != QETH_CARD_TYPE_OSN) + SET_ETHTOOL_OPS(card->dev, &qeth_l2_ethtool_ops); + else + SET_ETHTOOL_OPS(card->dev, &qeth_l2_osn_ops); + card->dev->features |= NETIF_F_HW_VLAN_FILTER; + card->info.broadcast_capable = 1; + qeth_l2_request_initial_mac(card); + SET_NETDEV_DEV(card->dev, &card->gdev->dev); + return register_netdev(card->dev); +} + +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; + + BUG_ON(!card); + QETH_DBF_TEXT(setup, 2, "setonlin"); + QETH_DBF_HEX(setup, 2, &card, sizeof(void *)); + + qeth_set_allowed_threads(card, QETH_RECOVER_THREAD, 1); + if (qeth_wait_for_threads(card, ~QETH_RECOVER_THREAD)) { + PRINT_WARN("set_online of card %s interrupted by user!\n", + CARD_BUS_ID(card)); + return -ERESTARTSYS; + } + + recover_flag = card->state; + rc = ccw_device_set_online(CARD_RDEV(card)); + if (rc) { + QETH_DBF_TEXT_(setup, 2, "1err%d", rc); + return -EIO; + } + rc = ccw_device_set_online(CARD_WDEV(card)); + if (rc) { + QETH_DBF_TEXT_(setup, 2, "1err%d", rc); + return -EIO; + } + rc = ccw_device_set_online(CARD_DDEV(card)); + if (rc) { + QETH_DBF_TEXT_(setup, 2, "1err%d", rc); + return -EIO; + } + + rc = qeth_core_hardsetup_card(card); + if (rc) { + QETH_DBF_TEXT_(setup, 2, "2err%d", rc); + goto out_remove; + } + + if (!card->dev && qeth_l2_setup_netdev(card)) + goto out_remove; + + if (card->info.type != QETH_CARD_TYPE_OSN) + qeth_l2_send_setmac(card, &card->dev->dev_addr[0]); + + card->state = CARD_STATE_HARDSETUP; + qeth_print_status_message(card); + + /* softsetup */ + QETH_DBF_TEXT(setup, 2, "softsetp"); + + rc = qeth_send_startlan(card); + if (rc) { + QETH_DBF_TEXT_(setup, 2, "1err%d", rc); + if (rc == 0xe080) { + PRINT_WARN("LAN on card %s if offline! " + "Waiting for STARTLAN from card.\n", + CARD_BUS_ID(card)); + card->lan_online = 0; + } + return rc; + } else + card->lan_online = 1; + + if (card->info.type != QETH_CARD_TYPE_OSN) { + qeth_set_large_send(card, card->options.large_send); + qeth_l2_process_vlans(card, 0); + } + + netif_tx_disable(card->dev); + + rc = qeth_init_qdio_queues(card); + if (rc) { + QETH_DBF_TEXT_(setup, 2, "6err%d", rc); + goto out_remove; + } + card->state = CARD_STATE_SOFTSETUP; + netif_carrier_on(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_multicast_list(card->dev); + } + /* let user_space know that device is online */ + kobject_uevent(&gdev->dev.kobj, KOBJ_CHANGE); + return 0; +out_remove: + card->use_hard_stop = 1; + 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)); + if (recover_flag == CARD_STATE_RECOVER) + card->state = CARD_STATE_RECOVER; + else + card->state = CARD_STATE_DOWN; + return -ENODEV; +} + +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; + + 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 (qeth_l2_stop_card(card, recovery_mode) == -ERESTARTSYS) { + PRINT_WARN("Stopping card %s interrupted by user!\n", + CARD_BUS_ID(card)); + return -ERESTARTSYS; + } + 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); + 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); + 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_DBF_TEXT(trace, 2, "recover1"); + QETH_DBF_HEX(trace, 2, &card, sizeof(void *)); + if (!qeth_do_run_thread(card, QETH_RECOVER_THREAD)) + return 0; + QETH_DBF_TEXT(trace, 2, "recover2"); + PRINT_WARN("Recovery of device %s started ...\n", + CARD_BUS_ID(card)); + card->use_hard_stop = 1; + __qeth_l2_set_offline(card->gdev, 1); + rc = __qeth_l2_set_online(card->gdev, 1); + /* don't run another scheduled recovery */ + qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD); + qeth_clear_thread_running_bit(card, QETH_RECOVER_THREAD); + if (!rc) + PRINT_INFO("Device %s successfully recovered!\n", + CARD_BUS_ID(card)); + else + PRINT_INFO("Device %s could not be recovered!\n", + CARD_BUS_ID(card)); + return 0; +} + +static int __init qeth_l2_init(void) +{ + PRINT_INFO("register layer 2 discipline\n"); + return 0; +} + +static void __exit qeth_l2_exit(void) +{ + PRINT_INFO("unregister layer 2 discipline\n"); +} + +static void qeth_l2_shutdown(struct ccwgroup_device *gdev) +{ + struct qeth_card *card = dev_get_drvdata(&gdev->dev); + qeth_qdio_clear_card(card, 0); + qeth_clear_qdio_buffers(card); +} + +struct ccwgroup_driver qeth_l2_ccwgroup_driver = { + .probe = qeth_l2_probe_device, + .remove = qeth_l2_remove_device, + .set_online = qeth_l2_set_online, + .set_offline = qeth_l2_set_offline, + .shutdown = qeth_l2_shutdown, +}; +EXPORT_SYMBOL_GPL(qeth_l2_ccwgroup_driver); + +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_DBF_TEXT(trace, 5, "osndctrd"); + + wait_event(card->wait_q, + atomic_cmpxchg(&card->write.irq_pending, 0, 1) == 0); + qeth_prepare_control_data(card, len, iob); + QETH_DBF_TEXT(trace, 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) { + PRINT_WARN("qeth_osn_send_control_data: " + "ccw_device_start rc = %i\n", rc); + QETH_DBF_TEXT_(trace, 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_DBF_TEXT(trace, 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; + + QETH_DBF_TEXT(trace, 2, "osnsdmc"); + if (!dev) + return -ENODEV; + card = netdev_priv(dev); + if (!card) + return -ENODEV; + if ((card->state != CARD_STATE_UP) && + (card->state != CARD_STATE_SOFTSETUP)) + 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; + + QETH_DBF_TEXT(trace, 2, "osnreg"); + *dev = qeth_l2_netdev_by_devno(read_dev_no); + if (*dev == NULL) + return -ENODEV; + card = netdev_priv(*dev); + if (!card) + return -ENODEV; + 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; + + QETH_DBF_TEXT(trace, 2, "osndereg"); + if (!dev) + return; + card = netdev_priv(dev); + if (!card) + return; + card->osn_info.assist_cb = NULL; + card->osn_info.data_cb = NULL; + return; +} +EXPORT_SYMBOL(qeth_osn_deregister); + +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"); |