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linux/drivers/s390/net/qeth_l2_main.c

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/*
* drivers/s390/net/qeth_l2_main.c
*
* 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/etherdevice.h>
#include <linux/mii.h>
#include <linux/ip.h>
#include <linux/list.h>
#include "qeth_core.h"
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 = dev->ml_priv;
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;
__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_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 == IPA_RC_L2_DUP_MAC) {
QETH_DBF_MESSAGE(2, "Group MAC %pM already existing on %s \n",
mac, QETH_CARD_IFNAME(card));
cmd->hdr.return_code = 0;
}
if (cmd->hdr.return_code)
QETH_DBF_MESSAGE(2, "Could not set group MAC %pM on %s: %x\n",
mac, 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)
QETH_DBF_MESSAGE(2, "Could not delete group MAC %pM on %s: %x\n",
mac, 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, int vmac)
{
struct qeth_mc_mac *mc;
int rc;
mc = kmalloc(sizeof(struct qeth_mc_mac), GFP_ATOMIC);
if (!mc)
return;
memcpy(mc->mc_addr, mac, OSA_ADDR_LEN);
mc->mc_addrlen = OSA_ADDR_LEN;
mc->is_vmac = vmac;
if (vmac) {
rc = qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETVMAC,
NULL);
} else {
rc = qeth_l2_send_setgroupmac(card, mac);
}
if (!rc)
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) {
if (mc->is_vmac)
qeth_l2_send_setdelmac(card, mc->mc_addr,
IPA_CMD_DELVMAC, NULL);
else
qeth_l2_send_delgroupmac(card, mc->mc_addr);
list_del(&mc->list);
kfree(mc);
}
spin_unlock_bh(&card->mclock);
}
static inline int qeth_l2_get_cast_type(struct qeth_card *card,
struct sk_buff *skb)
{
if (card->info.type == QETH_CARD_TYPE_OSN)
return RTN_UNSPEC;
if (is_broadcast_ether_addr(skb->data))
return RTN_BROADCAST;
if (is_multicast_ether_addr(skb->data))
return RTN_MULTICAST;
return RTN_UNSPEC;
}
static void qeth_l2_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_mac_header(skb);
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
hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_UNICAST;
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) {
QETH_DBF_MESSAGE(2, "Error in processing VLAN %i on %s: 0x%x. "
"Continuing\n", cmd->data.setdelvlan.vlan_id,
QETH_CARD_IFNAME(card), cmd->hdr.return_code);
QETH_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 = dev->ml_priv;
struct qeth_vlan_vid *id;
QETH_DBF_TEXT_(TRACE, 4, "aid:%d", vid);
if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
QETH_DBF_TEXT(TRACE, 3, "aidREC");
return;
}
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);
}
}
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 = dev->ml_priv;
QETH_DBF_TEXT_(TRACE, 4, "kid:%d", vid);
if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
QETH_DBF_TEXT(TRACE, 3, "kidREC");
return;
}
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 (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 ||
recovery_mode) {
__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);
if (!card->use_hard_stop ||
recovery_mode)
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;
if (skb->protocol == htons(ETH_P_802_2))
*((__u32 *)skb->cb) = ++card->seqno.pkt_seqno;
len = skb->len;
netif_rx(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_DBF_TEXT(TRACE, 3, "inbunkno");
QETH_DBF_HEX(CTRL, 3, hdr, QETH_DBF_CTRL_LEN);
continue;
}
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;
switch (cmd->hdr.return_code) {
case IPA_RC_L2_DUP_MAC:
case IPA_RC_L2_DUP_LAYER3_MAC:
dev_warn(&card->gdev->dev,
"MAC address "
"%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x "
"already exists\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]);
break;
case IPA_RC_L2_MAC_NOT_AUTH_BY_HYP:
case IPA_RC_L2_MAC_NOT_AUTH_BY_ADP:
dev_warn(&card->gdev->dev,
"MAC address "
"%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x "
"is not authorized\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]);
break;
default:
break;
}
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);
dev_info(&card->gdev->dev,
"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) {
QETH_DBF_MESSAGE(2, "could not query adapter parameters on "
"device %s: x%x\n", CARD_BUS_ID(card), rc);
}
if ((card->info.type == QETH_CARD_TYPE_IQD) ||
(card->info.guestlan)) {
rc = qeth_setadpparms_change_macaddr(card);
if (rc) {
QETH_DBF_MESSAGE(2, "couldn't get MAC address on "
"device %s: x%x\n", CARD_BUS_ID(card), rc);
QETH_DBF_TEXT_(SETUP, 2, "1err%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 = dev->ml_priv;
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) {
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);
if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
QETH_DBF_TEXT(TRACE, 3, "setmcREC");
return -ERESTARTSYS;
}
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 = dev->ml_priv;
struct dev_addr_list *dm;
struct netdev_hw_addr *ha;
if (card->info.type == QETH_CARD_TYPE_OSN)
return ;
QETH_DBF_TEXT(TRACE, 3, "setmulti");
if (qeth_threads_running(card, QETH_RECOVER_THREAD) &&
(card->state != CARD_STATE_UP))
return;
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->da_addr, 0);
list_for_each_entry(ha, &dev->uc.list, list)
qeth_l2_add_mc(card, ha->addr, 1);
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 = dev->ml_priv;
struct sk_buff *new_skb = skb;
int ipv = qeth_get_ip_version(skb);
int cast_type = qeth_l2_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;
int data_offset = -1;
int elements_needed = 0;
int hd_len = 0;
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 (card->info.type == QETH_CARD_TYPE_OSN)
hdr = (struct qeth_hdr *)skb->data;
else {
if (card->info.type == QETH_CARD_TYPE_IQD) {
new_skb = skb;
data_offset = ETH_HLEN;
hd_len = ETH_HLEN;
hdr = kmem_cache_alloc(qeth_core_header_cache,
GFP_ATOMIC);
if (!hdr)
goto tx_drop;
elements_needed++;
skb_reset_mac_header(new_skb);
qeth_l2_fill_header(card, hdr, new_skb, ipv, cast_type);
hdr->hdr.l2.pkt_length = new_skb->len;
memcpy(((char *)hdr) + sizeof(struct qeth_hdr),
skb_mac_header(new_skb), ETH_HLEN);
} else {
/* create a clone with writeable headroom */
new_skb = skb_realloc_headroom(skb,
sizeof(struct qeth_hdr));
if (!new_skb)
goto tx_drop;
hdr = (struct qeth_hdr *)skb_push(new_skb,
sizeof(struct qeth_hdr));
skb_set_mac_header(new_skb, sizeof(struct qeth_hdr));
qeth_l2_fill_header(card, hdr, new_skb, ipv, cast_type);
}
}
elements = qeth_get_elements_no(card, (void *)hdr, new_skb,
elements_needed);
if (!elements) {
if (data_offset >= 0)
kmem_cache_free(qeth_core_header_cache, hdr);
goto tx_drop;
}
if (card->info.type != QETH_CARD_TYPE_IQD)
rc = qeth_do_send_packet(card, queue, new_skb, hdr,
elements);
else
rc = qeth_do_send_packet_fast(card, queue, new_skb, hdr,
elements, data_offset, hd_len);
if (!rc) {
card->stats.tx_packets++;
card->stats.tx_bytes += tx_bytes;
if (new_skb != skb)
dev_kfree_skb_any(skb);
rc = NETDEV_TX_OK;
} else {
if (data_offset >= 0)
kmem_cache_free(qeth_core_header_cache, hdr);
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);
netif_wake_queue(dev);
return NETDEV_TX_OK;
}
static void qeth_l2_qdio_input_handler(struct ccw_device *ccwdev,
unsigned int qdio_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;
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 (qdio_err & QDIO_ERROR_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", queue);
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 (!(qdio_err &&
qeth_check_qdio_errors(buffer->buffer, qdio_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 = dev->ml_priv;
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;
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 = dev->ml_priv;
QETH_DBF_TEXT(TRACE, 4, "qethstop");
netif_tx_disable(dev);
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);
qeth_set_allowed_threads(card, 0, 1);
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 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_stats_count = qeth_core_get_stats_count,
.get_drvinfo = qeth_core_get_drvinfo,
.get_settings = qeth_core_ethtool_get_settings,
};
static const 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 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_validate_addr = eth_validate_addr,
.ndo_set_multicast_list = qeth_l2_set_multicast_list,
.ndo_do_ioctl = qeth_l2_do_ioctl,
.ndo_set_mac_address = qeth_l2_set_mac_address,
.ndo_change_mtu = qeth_change_mtu,
.ndo_vlan_rx_add_vid = qeth_l2_vlan_rx_add_vid,
.ndo_vlan_rx_kill_vid = qeth_l2_vlan_rx_kill_vid,
.ndo_tx_timeout = qeth_tx_timeout,
};
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->ml_priv = card;
card->dev->watchdog_timeo = QETH_TX_TIMEOUT;
card->dev->mtu = card->info.initial_mtu;
card->dev->netdev_ops = &qeth_l2_netdev_ops;
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);
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) {
dev_warn(&card->gdev->dev,
"The LAN is offline\n");
card->lan_online = 0;
return 0;
}
goto out_remove;
} 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;
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);
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");
dev_warn(&card->gdev->dev,
"A recovery process has been started for the device\n");
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)
dev_info(&card->gdev->dev,
"Device successfully recovered!\n");
else {
if (card->dev) {
rtnl_lock();
dev_close(card->dev);
rtnl_unlock();
}
dev_warn(&card->gdev->dev, "The qeth device driver "
"failed to recover an error on the device\n");
}
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 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);
}
static int qeth_l2_pm_suspend(struct ccwgroup_device *gdev)
{
struct qeth_card *card = dev_get_drvdata(&gdev->dev);
if (card->dev)
netif_device_detach(card->dev);
qeth_set_allowed_threads(card, 0, 1);
wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
if (gdev->state == CCWGROUP_OFFLINE)
return 0;
if (card->state == CARD_STATE_UP) {
card->use_hard_stop = 1;
__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) {
if (card->dev) {
rtnl_lock();
dev_close(card->dev);
rtnl_unlock();
}
}
} else
rc = __qeth_l2_set_online(card->gdev, 0);
out:
qeth_set_allowed_threads(card, 0xffffffff, 0);
if (card->dev)
netif_device_attach(card->dev);
if (rc)
dev_warn(&card->gdev->dev, "The qeth device driver "
"failed to recover an error on the device\n");
return rc;
}
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,
.freeze = qeth_l2_pm_suspend,
.thaw = qeth_l2_pm_resume,
.restore = qeth_l2_pm_resume,
};
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) {
QETH_DBF_MESSAGE(2, "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 = dev->ml_priv;
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 = (*dev)->ml_priv;
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 = dev->ml_priv;
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");
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