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remarkable-linux/drivers/s390/net/qeth_l2_main.c
Julian Wiedmann db71bbbd11 s390/qeth: fix request-side race during cmd IO timeout 
Submitting a cmd IO request (usually on the WRITE device, but for IDX
also on the READ device) is currently done with ccw_device_start()
and a manual timeout in the caller.
On timeout, the caller cleans up the related resources (eg. IO buffer).
But 1) the IO might still be active and utilize those resources, and
    2) when the IO completes, qeth_irq() will attempt to clean up the
       same resources again.

Instead of introducing additional resource locking, switch to
ccw_device_start_timeout() to ensure IO termination after timeout, and
let the IRQ handler alone deal with cleaning up after a request.

This also removes a stray write->irq_pending reset from
clear_ipacmd_list(). The routine doesn't terminate any pending IO on
the WRITE device, so this should be handled properly via IO timeout
in the IRQ handler.

Signed-off-by: Julian Wiedmann <jwi@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-04-22 14:42:32 -04:00

2491 lines
68 KiB
C
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// 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/ip.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_l2_set_rx_mode(struct net_device *);
static void qeth_bridgeport_query_support(struct qeth_card *card);
static void qeth_bridge_state_change(struct qeth_card *card,
struct qeth_ipa_cmd *cmd);
static void qeth_bridge_host_event(struct qeth_card *card,
struct qeth_ipa_cmd *cmd);
static 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_64bits(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_64bits(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_UNSPEC;
if (is_broadcast_ether_addr(skb->data))
return RTN_BROADCAST;
if (is_multicast_ether_addr(skb->data))
return RTN_MULTICAST;
return RTN_UNSPEC;
}
static void qeth_l2_hdr_csum(struct qeth_card *card, struct qeth_hdr *hdr,
struct sk_buff *skb)
{
struct iphdr *iph = ip_hdr(skb);
/* tcph->check contains already the pseudo hdr checksum
* so just set the header flags
*/
if (iph->protocol == IPPROTO_UDP)
hdr->hdr.l2.flags[1] |= QETH_HDR_EXT_UDP;
hdr->hdr.l2.flags[1] |= QETH_HDR_EXT_CSUM_TRANSP_REQ |
QETH_HDR_EXT_CSUM_HDR_REQ;
iph->check = 0;
if (card->options.performance_stats)
card->perf_stats.tx_csum++;
}
static void qeth_l2_fill_header(struct qeth_hdr *hdr, struct sk_buff *skb,
int cast_type, unsigned int data_len)
{
struct vlan_ethhdr *veth = (struct vlan_ethhdr *)skb_mac_header(skb);
memset(hdr, 0, sizeof(struct qeth_hdr));
hdr->hdr.l2.id = QETH_HEADER_TYPE_LAYER2;
hdr->hdr.l2.pkt_length = data_len;
/* set byte byte 3 to casting flags */
if (cast_type == RTN_MULTICAST)
hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_MULTICAST;
else if (cast_type == RTN_BROADCAST)
hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_BROADCAST;
else
hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_UNICAST;
/* VSWITCH relies on the VLAN
* information to be present in
* the QDIO header */
if (veth->h_vlan_proto == __constant_htons(ETH_P_8021Q)) {
hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_VLAN;
hdr->hdr.l2.vlan_id = ntohs(veth->h_vlan_TCI);
}
}
static int qeth_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");
spin_lock_bh(&card->vlanlock);
list_for_each_entry(id, &card->vid_list, list) {
qeth_l2_send_setdelvlan(card, id->vid, IPA_CMD_SETVLAN);
}
spin_unlock_bh(&card->vlanlock);
}
static int qeth_l2_vlan_rx_add_vid(struct net_device *dev,
__be16 proto, u16 vid)
{
struct qeth_card *card = dev->ml_priv;
struct qeth_vlan_vid *id;
int rc;
QETH_CARD_TEXT_(card, 4, "aid:%d", vid);
if (!vid)
return 0;
if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
QETH_CARD_TEXT(card, 3, "aidREC");
return 0;
}
id = kmalloc(sizeof(struct qeth_vlan_vid), GFP_ATOMIC);
if (id) {
id->vid = vid;
rc = qeth_l2_send_setdelvlan(card, vid, IPA_CMD_SETVLAN);
if (rc) {
kfree(id);
return rc;
}
spin_lock_bh(&card->vlanlock);
list_add_tail(&id->list, &card->vid_list);
spin_unlock_bh(&card->vlanlock);
} else {
return -ENOMEM;
}
return 0;
}
static int qeth_l2_vlan_rx_kill_vid(struct net_device *dev,
__be16 proto, u16 vid)
{
struct qeth_vlan_vid *id, *tmpid = NULL;
struct qeth_card *card = dev->ml_priv;
int rc = 0;
QETH_CARD_TEXT_(card, 4, "kid:%d", vid);
if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
QETH_CARD_TEXT(card, 3, "kidREC");
return 0;
}
spin_lock_bh(&card->vlanlock);
list_for_each_entry(id, &card->vid_list, list) {
if (id->vid == vid) {
list_del(&id->list);
tmpid = id;
break;
}
}
spin_unlock_bh(&card->vlanlock);
if (tmpid) {
rc = qeth_l2_send_setdelvlan(card, vid, IPA_CMD_DELVLAN);
kfree(tmpid);
}
qeth_l2_set_rx_mode(card->dev);
return rc;
}
static void qeth_l2_stop_card(struct qeth_card *card, int recovery_mode)
{
QETH_DBF_TEXT(SETUP , 2, "stopcard");
QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
qeth_set_allowed_threads(card, 0, 1);
if (card->read.state == CH_STATE_UP &&
card->write.state == CH_STATE_UP &&
(card->state == CARD_STATE_UP)) {
if (recovery_mode &&
card->info.type != QETH_CARD_TYPE_OSN) {
qeth_l2_stop(card->dev);
} else {
rtnl_lock();
dev_close(card->dev);
rtnl_unlock();
}
card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
card->state = CARD_STATE_SOFTSETUP;
}
if (card->state == CARD_STATE_SOFTSETUP) {
qeth_l2_del_all_macs(card);
qeth_clear_ipacmd_list(card);
card->state = CARD_STATE_HARDSETUP;
}
if (card->state == CARD_STATE_HARDSETUP) {
qeth_qdio_clear_card(card, 0);
qeth_clear_qdio_buffers(card);
qeth_clear_working_pool_list(card);
card->state = CARD_STATE_DOWN;
}
if (card->state == CARD_STATE_DOWN) {
qeth_clear_cmd_buffers(&card->read);
qeth_clear_cmd_buffers(&card->write);
}
}
static int qeth_l2_process_inbound_buffer(struct qeth_card *card,
int budget, int *done)
{
int work_done = 0;
struct sk_buff *skb;
struct qeth_hdr *hdr;
unsigned int len;
*done = 0;
WARN_ON_ONCE(!budget);
while (budget) {
skb = qeth_core_get_next_skb(card,
&card->qdio.in_q->bufs[card->rx.b_index],
&card->rx.b_element, &card->rx.e_offset, &hdr);
if (!skb) {
*done = 1;
break;
}
switch (hdr->hdr.l2.id) {
case QETH_HEADER_TYPE_LAYER2:
skb->protocol = eth_type_trans(skb, skb->dev);
if ((card->dev->features & NETIF_F_RXCSUM)
&& ((hdr->hdr.l2.flags[1] &
(QETH_HDR_EXT_CSUM_HDR_REQ |
QETH_HDR_EXT_CSUM_TRANSP_REQ)) ==
(QETH_HDR_EXT_CSUM_HDR_REQ |
QETH_HDR_EXT_CSUM_TRANSP_REQ)))
skb->ip_summed = CHECKSUM_UNNECESSARY;
else
skb->ip_summed = CHECKSUM_NONE;
if (skb->protocol == htons(ETH_P_802_2))
*((__u32 *)skb->cb) = ++card->seqno.pkt_seqno;
len = skb->len;
napi_gro_receive(&card->napi, skb);
break;
case QETH_HEADER_TYPE_OSN:
if (card->info.type == QETH_CARD_TYPE_OSN) {
skb_push(skb, sizeof(struct qeth_hdr));
skb_copy_to_linear_data(skb, hdr,
sizeof(struct qeth_hdr));
len = skb->len;
card->osn_info.data_cb(skb);
break;
}
/* else unknown */
default:
dev_kfree_skb_any(skb);
QETH_CARD_TEXT(card, 3, "inbunkno");
QETH_DBF_HEX(CTRL, 3, hdr, QETH_DBF_CTRL_LEN);
continue;
}
work_done++;
budget--;
card->stats.rx_packets++;
card->stats.rx_bytes += len;
}
return work_done;
}
static int qeth_l2_request_initial_mac(struct qeth_card *card)
{
int rc = 0;
char vendor_pre[] = {0x02, 0x00, 0x00};
QETH_DBF_TEXT(SETUP, 2, "l2reqmac");
QETH_DBF_TEXT_(SETUP, 2, "doL2%s", CARD_BUS_ID(card));
if (MACHINE_IS_VM) {
rc = qeth_vm_request_mac(card);
if (!rc)
goto out;
QETH_DBF_MESSAGE(2, "z/VM MAC Service failed on device %s: x%x\n",
CARD_BUS_ID(card), rc);
QETH_DBF_TEXT_(SETUP, 2, "err%04x", rc);
/* fall back to alternative mechanism: */
}
if (card->info.type == QETH_CARD_TYPE_IQD ||
card->info.type == QETH_CARD_TYPE_OSM ||
card->info.type == QETH_CARD_TYPE_OSX ||
card->info.guestlan) {
rc = qeth_setadpparms_change_macaddr(card);
if (rc) {
QETH_DBF_MESSAGE(2, "couldn't get MAC address on "
"device %s: x%x\n", CARD_BUS_ID(card), rc);
QETH_DBF_TEXT_(SETUP, 2, "1err%04x", rc);
return rc;
}
} else {
eth_random_addr(card->dev->dev_addr);
memcpy(card->dev->dev_addr, vendor_pre, 3);
}
out:
QETH_DBF_HEX(SETUP, 2, card->dev->dev_addr, card->dev->addr_len);
return 0;
}
static int qeth_l2_set_mac_address(struct net_device *dev, void *p)
{
struct sockaddr *addr = p;
struct qeth_card *card = dev->ml_priv;
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;
}
if (!qeth_card_hw_is_reachable(card)) {
ether_addr_copy(dev->dev_addr, addr->sa_data);
return 0;
}
/* 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))
return 0;
/* add the new address, switch over, drop the old */
rc = qeth_l2_send_setmac(card, addr->sa_data);
if (rc)
return rc;
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;
return 0;
}
static void qeth_promisc_to_bridge(struct qeth_card *card)
{
struct net_device *dev = card->dev;
enum qeth_ipa_promisc_modes promisc_mode;
int role;
int rc;
QETH_CARD_TEXT(card, 3, "pmisc2br");
if (!card->options.sbp.reflect_promisc)
return;
promisc_mode = (dev->flags & IFF_PROMISC) ? SET_PROMISC_MODE_ON
: SET_PROMISC_MODE_OFF;
if (promisc_mode == card->info.promisc_mode)
return;
if (promisc_mode == SET_PROMISC_MODE_ON) {
if (card->options.sbp.reflect_promisc_primary)
role = QETH_SBP_ROLE_PRIMARY;
else
role = QETH_SBP_ROLE_SECONDARY;
} else
role = QETH_SBP_ROLE_NONE;
rc = qeth_bridgeport_setrole(card, role);
QETH_DBF_TEXT_(SETUP, 2, "bpm%c%04x",
(promisc_mode == SET_PROMISC_MODE_ON) ? '+' : '-', rc);
if (!rc) {
card->options.sbp.role = role;
card->info.promisc_mode = promisc_mode;
}
}
/* New MAC address is added to the hash table and marked to be written on card
* only if there is not in the hash table storage already
*
*/
static void qeth_l2_add_mac(struct qeth_card *card, struct netdev_hw_addr *ha)
{
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_iqd(struct qeth_card *card, struct sk_buff *skb,
struct qeth_qdio_out_q *queue, int cast_type)
{
unsigned int data_offset = ETH_HLEN;
struct qeth_hdr *hdr;
int rc;
hdr = kmem_cache_alloc(qeth_core_header_cache, GFP_ATOMIC);
if (!hdr)
return -ENOMEM;
qeth_l2_fill_header(hdr, skb, cast_type, skb->len);
skb_copy_from_linear_data(skb, ((char *)hdr) + sizeof(*hdr),
data_offset);
if (!qeth_get_elements_no(card, skb, 1, data_offset)) {
rc = -E2BIG;
goto out;
}
rc = qeth_do_send_packet_fast(queue, skb, hdr, data_offset,
sizeof(*hdr) + data_offset);
out:
if (rc)
kmem_cache_free(qeth_core_header_cache, hdr);
return rc;
}
static int qeth_l2_xmit_osa(struct qeth_card *card, struct sk_buff *skb,
struct qeth_qdio_out_q *queue, int cast_type)
{
int push_len = sizeof(struct qeth_hdr);
unsigned int elements, nr_frags;
unsigned int hdr_elements = 0;
struct qeth_hdr *hdr = NULL;
unsigned int hd_len = 0;
int rc;
/* fix hardware limitation: as long as we do not have sbal
* chaining we can not send long frag lists
*/
if (!qeth_get_elements_no(card, skb, 0, 0)) {
rc = skb_linearize(skb);
if (card->options.performance_stats) {
if (rc)
card->perf_stats.tx_linfail++;
else
card->perf_stats.tx_lin++;
}
if (rc)
return rc;
}
nr_frags = skb_shinfo(skb)->nr_frags;
rc = skb_cow_head(skb, push_len);
if (rc)
return rc;
push_len = qeth_push_hdr(skb, &hdr, push_len);
if (push_len < 0)
return push_len;
if (!push_len) {
/* hdr was allocated from cache */
hd_len = sizeof(*hdr);
hdr_elements = 1;
}
qeth_l2_fill_header(hdr, skb, cast_type, skb->len - push_len);
if (skb->ip_summed == CHECKSUM_PARTIAL)
qeth_l2_hdr_csum(card, hdr, skb);
elements = qeth_get_elements_no(card, skb, hdr_elements, 0);
if (!elements) {
rc = -E2BIG;
goto out;
}
elements += hdr_elements;
/* TODO: remove the skb_orphan() once TX completion is fast enough */
skb_orphan(skb);
rc = qeth_do_send_packet(card, queue, skb, hdr, 0, hd_len, elements);
out:
if (!rc) {
if (card->options.performance_stats && nr_frags) {
card->perf_stats.sg_skbs_sent++;
/* nr_frags + skb->data */
card->perf_stats.sg_frags_sent += nr_frags + 1;
}
} else {
if (hd_len)
kmem_cache_free(qeth_core_header_cache, hdr);
if (rc == -EBUSY)
/* roll back to ETH header */
skb_pull(skb, push_len);
}
return rc;
}
static int qeth_l2_xmit_osn(struct qeth_card *card, struct sk_buff *skb,
struct qeth_qdio_out_q *queue)
{
unsigned int elements;
struct qeth_hdr *hdr;
if (skb->protocol == htons(ETH_P_IPV6))
return -EPROTONOSUPPORT;
hdr = (struct qeth_hdr *)skb->data;
elements = qeth_get_elements_no(card, skb, 0, 0);
if (!elements)
return -E2BIG;
if (qeth_hdr_chk_and_bounce(skb, &hdr, sizeof(*hdr)))
return -EINVAL;
return qeth_do_send_packet(card, queue, skb, hdr, 0, 0, elements);
}
static netdev_tx_t qeth_l2_hard_start_xmit(struct sk_buff *skb,
struct net_device *dev)
{
struct qeth_card *card = dev->ml_priv;
int cast_type = qeth_l2_get_cast_type(card, skb);
struct qeth_qdio_out_q *queue;
int tx_bytes = skb->len;
int rc;
if (card->qdio.do_prio_queueing || (cast_type &&
card->info.is_multicast_different))
queue = card->qdio.out_qs[qeth_get_priority_queue(card, skb,
qeth_get_ip_version(skb), cast_type)];
else
queue = card->qdio.out_qs[card->qdio.default_out_queue];
if ((card->state != CARD_STATE_UP) || !card->lan_online) {
card->stats.tx_carrier_errors++;
goto tx_drop;
}
if (card->options.performance_stats) {
card->perf_stats.outbound_cnt++;
card->perf_stats.outbound_start_time = qeth_get_micros();
}
netif_stop_queue(dev);
switch (card->info.type) {
case QETH_CARD_TYPE_OSN:
rc = qeth_l2_xmit_osn(card, skb, queue);
break;
case QETH_CARD_TYPE_IQD:
rc = qeth_l2_xmit_iqd(card, skb, queue, cast_type);
break;
default:
rc = qeth_l2_xmit_osa(card, skb, queue, cast_type);
}
if (!rc) {
card->stats.tx_packets++;
card->stats.tx_bytes += tx_bytes;
if (card->options.performance_stats)
card->perf_stats.outbound_time += qeth_get_micros() -
card->perf_stats.outbound_start_time;
netif_wake_queue(dev);
return NETDEV_TX_OK;
} else if (rc == -EBUSY) {
return NETDEV_TX_BUSY;
} /* else fall through */
tx_drop:
card->stats.tx_dropped++;
card->stats.tx_errors++;
dev_kfree_skb_any(skb);
netif_wake_queue(dev);
return NETDEV_TX_OK;
}
static int __qeth_l2_open(struct net_device *dev)
{
struct qeth_card *card = dev->ml_priv;
int rc = 0;
QETH_CARD_TEXT(card, 4, "qethopen");
if (card->state == CARD_STATE_UP)
return rc;
if (card->state != CARD_STATE_SOFTSETUP)
return -ENODEV;
if ((card->info.type != QETH_CARD_TYPE_OSN) &&
(!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))) {
QETH_CARD_TEXT(card, 4, "nomacadr");
return -EPERM;
}
card->data.state = CH_STATE_UP;
card->state = CARD_STATE_UP;
netif_start_queue(dev);
if (qdio_stop_irq(card->data.ccwdev, 0) >= 0) {
napi_enable(&card->napi);
napi_schedule(&card->napi);
} 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);
if (card->dev) {
unregister_netdev(card->dev);
free_netdev(card->dev);
card->dev = NULL;
}
return;
}
static const struct ethtool_ops qeth_l2_ethtool_ops = {
.get_link = ethtool_op_get_link,
.get_strings = qeth_core_get_strings,
.get_ethtool_stats = qeth_core_get_ethtool_stats,
.get_sset_count = qeth_core_get_sset_count,
.get_drvinfo = qeth_core_get_drvinfo,
.get_link_ksettings = qeth_core_ethtool_get_link_ksettings,
};
static const struct ethtool_ops qeth_l2_osn_ops = {
.get_strings = qeth_core_get_strings,
.get_ethtool_stats = qeth_core_get_ethtool_stats,
.get_sset_count = qeth_core_get_sset_count,
.get_drvinfo = qeth_core_get_drvinfo,
};
static const struct net_device_ops qeth_l2_netdev_ops = {
.ndo_open = qeth_l2_open,
.ndo_stop = qeth_l2_stop,
.ndo_get_stats = qeth_get_stats,
.ndo_start_xmit = qeth_l2_hard_start_xmit,
.ndo_features_check = qeth_features_check,
.ndo_validate_addr = eth_validate_addr,
.ndo_set_rx_mode = qeth_l2_set_rx_mode,
.ndo_do_ioctl = qeth_do_ioctl,
.ndo_set_mac_address = qeth_l2_set_mac_address,
.ndo_change_mtu = qeth_change_mtu,
.ndo_vlan_rx_add_vid = qeth_l2_vlan_rx_add_vid,
.ndo_vlan_rx_kill_vid = qeth_l2_vlan_rx_kill_vid,
.ndo_tx_timeout = qeth_tx_timeout,
.ndo_fix_features = qeth_fix_features,
.ndo_set_features = qeth_set_features
};
static int qeth_l2_setup_netdev(struct qeth_card *card)
{
switch (card->info.type) {
case QETH_CARD_TYPE_IQD:
card->dev = alloc_netdev(0, "hsi%d", NET_NAME_UNKNOWN,
ether_setup);
break;
case QETH_CARD_TYPE_OSN:
card->dev = alloc_netdev(0, "osn%d", NET_NAME_UNKNOWN,
ether_setup);
break;
default:
card->dev = alloc_etherdev(0);
}
if (!card->dev)
return -ENODEV;
card->dev->ml_priv = card;
card->dev->priv_flags |= IFF_UNICAST_FLT;
card->dev->watchdog_timeo = QETH_TX_TIMEOUT;
card->dev->mtu = card->info.initial_mtu;
card->dev->min_mtu = 64;
card->dev->max_mtu = ETH_MAX_MTU;
card->dev->netdev_ops = &qeth_l2_netdev_ops;
if (card->info.type == QETH_CARD_TYPE_OSN) {
card->dev->ethtool_ops = &qeth_l2_osn_ops;
card->dev->flags |= IFF_NOARP;
} else {
card->dev->ethtool_ops = &qeth_l2_ethtool_ops;
}
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_OSN &&
card->info.type != QETH_CARD_TYPE_IQD) {
card->dev->priv_flags &= ~IFF_TX_SKB_SHARING;
card->dev->needed_headroom = sizeof(struct qeth_hdr);
card->dev->hw_features |= NETIF_F_SG;
card->dev->vlan_features |= NETIF_F_SG;
}
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_supported(card, IPA_INBOUND_CHECKSUM)) {
card->dev->hw_features |= NETIF_F_RXCSUM;
card->dev->vlan_features |= NETIF_F_RXCSUM;
}
}
card->info.broadcast_capable = 1;
qeth_l2_request_initial_mac(card);
SET_NETDEV_DEV(card->dev, &card->gdev->dev);
netif_napi_add(card->dev, &card->napi, qeth_poll, QETH_NAPI_WEIGHT);
netif_carrier_off(card->dev);
return register_netdev(card->dev);
}
static int qeth_l2_start_ipassists(struct qeth_card *card)
{
/* configure isolation level */
if (qeth_set_access_ctrl_online(card, 0))
return -ENODEV;
return 0;
}
static void qeth_l2_trace_features(struct qeth_card *card)
{
/* 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");
if (!card->dev && qeth_l2_setup_netdev(card)) {
rc = -ENODEV;
goto out_remove;
}
if (card->info.type != QETH_CARD_TYPE_OSN &&
!qeth_l2_send_setmac(card, card->dev->dev_addr))
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);
if (recover_flag == CARD_STATE_RECOVER) {
if (recovery_mode &&
card->info.type != QETH_CARD_TYPE_OSN) {
__qeth_l2_open(card->dev);
} else {
rtnl_lock();
dev_open(card->dev);
rtnl_unlock();
}
/* this also sets saved unicast addresses */
qeth_l2_set_rx_mode(card->dev);
rtnl_lock();
qeth_recover_features(card->dev);
rtnl_unlock();
}
/* let user_space know that device is online */
kobject_uevent(&gdev->dev.kobj, KOBJ_CHANGE);
mutex_unlock(&card->conf_mutex);
mutex_unlock(&card->discipline_mutex);
return 0;
out_remove:
qeth_l2_stop_card(card, 0);
ccw_device_set_offline(CARD_DDEV(card));
ccw_device_set_offline(CARD_WDEV(card));
ccw_device_set_offline(CARD_RDEV(card));
qdio_free(CARD_DDEV(card));
if (recover_flag == CARD_STATE_RECOVER)
card->state = CARD_STATE_RECOVER;
else
card->state = CARD_STATE_DOWN;
mutex_unlock(&card->conf_mutex);
mutex_unlock(&card->discipline_mutex);
return rc;
}
static int qeth_l2_set_online(struct ccwgroup_device *gdev)
{
return __qeth_l2_set_online(gdev, 0);
}
static int __qeth_l2_set_offline(struct ccwgroup_device *cgdev,
int recovery_mode)
{
struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
int rc = 0, rc2 = 0, rc3 = 0;
enum qeth_card_states recover_flag;
mutex_lock(&card->discipline_mutex);
mutex_lock(&card->conf_mutex);
QETH_DBF_TEXT(SETUP, 3, "setoffl");
QETH_DBF_HEX(SETUP, 3, &card, sizeof(void *));
if (card->dev && netif_carrier_ok(card->dev))
netif_carrier_off(card->dev);
recover_flag = card->state;
if ((!recovery_mode && card->info.hwtrap) || card->info.hwtrap == 2) {
qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
card->info.hwtrap = 1;
}
qeth_l2_stop_card(card, recovery_mode);
rc = ccw_device_set_offline(CARD_DDEV(card));
rc2 = ccw_device_set_offline(CARD_WDEV(card));
rc3 = ccw_device_set_offline(CARD_RDEV(card));
if (!rc)
rc = (rc2) ? rc2 : rc3;
if (rc)
QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
qdio_free(CARD_DDEV(card));
if (recover_flag == CARD_STATE_UP)
card->state = CARD_STATE_RECOVER;
/* let user_space know that device is offline */
kobject_uevent(&cgdev->dev.kobj, KOBJ_CHANGE);
mutex_unlock(&card->conf_mutex);
mutex_unlock(&card->discipline_mutex);
return 0;
}
static int qeth_l2_set_offline(struct ccwgroup_device *cgdev)
{
return __qeth_l2_set_offline(cgdev, 0);
}
static int qeth_l2_recover(void *ptr)
{
struct qeth_card *card;
int rc = 0;
card = (struct qeth_card *) ptr;
QETH_CARD_TEXT(card, 2, "recover1");
if (!qeth_do_run_thread(card, QETH_RECOVER_THREAD))
return 0;
QETH_CARD_TEXT(card, 2, "recover2");
dev_warn(&card->gdev->dev,
"A recovery process has been started for the device\n");
qeth_set_recovery_task(card);
__qeth_l2_set_offline(card->gdev, 1);
rc = __qeth_l2_set_online(card->gdev, 1);
if (!rc)
dev_info(&card->gdev->dev,
"Device successfully recovered!\n");
else {
qeth_close_dev(card);
dev_warn(&card->gdev->dev, "The qeth device driver "
"failed to recover an error on the device\n");
}
qeth_clear_recovery_task(card);
qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
qeth_clear_thread_running_bit(card, QETH_RECOVER_THREAD);
return 0;
}
static int __init qeth_l2_init(void)
{
pr_info("register layer 2 discipline\n");
return 0;
}
static void __exit qeth_l2_exit(void)
{
pr_info("unregister layer 2 discipline\n");
}
static int qeth_l2_pm_suspend(struct ccwgroup_device *gdev)
{
struct qeth_card *card = dev_get_drvdata(&gdev->dev);
if (card->dev)
netif_device_detach(card->dev);
qeth_set_allowed_threads(card, 0, 1);
wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
if (gdev->state == CCWGROUP_OFFLINE)
return 0;
if (card->state == CARD_STATE_UP) {
if (card->info.hwtrap)
qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
__qeth_l2_set_offline(card->gdev, 1);
} else
__qeth_l2_set_offline(card->gdev, 0);
return 0;
}
static int qeth_l2_pm_resume(struct ccwgroup_device *gdev)
{
struct qeth_card *card = dev_get_drvdata(&gdev->dev);
int rc = 0;
if (gdev->state == CCWGROUP_OFFLINE)
goto out;
if (card->state == CARD_STATE_RECOVER) {
rc = __qeth_l2_set_online(card->gdev, 1);
if (rc) {
rtnl_lock();
dev_close(card->dev);
rtnl_unlock();
}
} else
rc = __qeth_l2_set_online(card->gdev, 0);
out:
qeth_set_allowed_threads(card, 0xffffffff, 0);
if (card->dev)
netif_device_attach(card->dev);
if (rc)
dev_warn(&card->gdev->dev, "The qeth device driver "
"failed to recover an error on the device\n");
return rc;
}
/* Returns zero if the command is successfully "consumed" */
static int qeth_l2_control_event(struct qeth_card *card,
struct qeth_ipa_cmd *cmd)
{
switch (cmd->hdr.command) {
case IPA_CMD_SETBRIDGEPORT_OSA:
case IPA_CMD_SETBRIDGEPORT_IQD:
if (cmd->data.sbp.hdr.command_code ==
IPA_SBP_BRIDGE_PORT_STATE_CHANGE) {
qeth_bridge_state_change(card, cmd);
return 0;
} else
return 1;
case IPA_CMD_ADDRESS_CHANGE_NOTIF:
qeth_bridge_host_event(card, cmd);
return 0;
default:
return 1;
}
}
struct qeth_discipline qeth_l2_discipline = {
.devtype = &qeth_l2_devtype,
.start_poll = qeth_qdio_start_poll,
.input_handler = (qdio_handler_t *) qeth_qdio_input_handler,
.output_handler = (qdio_handler_t *) qeth_qdio_output_handler,
.process_rx_buffer = qeth_l2_process_inbound_buffer,
.recover = qeth_l2_recover,
.setup = qeth_l2_probe_device,
.remove = qeth_l2_remove_device,
.set_online = qeth_l2_set_online,
.set_offline = qeth_l2_set_offline,
.freeze = qeth_l2_pm_suspend,
.thaw = qeth_l2_pm_resume,
.restore = qeth_l2_pm_resume,
.do_ioctl = NULL,
.control_event_handler = qeth_l2_control_event,
};
EXPORT_SYMBOL_GPL(qeth_l2_discipline);
static int qeth_osn_send_control_data(struct qeth_card *card, int len,
struct qeth_cmd_buffer *iob)
{
unsigned long flags;
int rc = 0;
QETH_CARD_TEXT(card, 5, "osndctrd");
wait_event(card->wait_q,
atomic_cmpxchg(&card->write.irq_pending, 0, 1) == 0);
qeth_prepare_control_data(card, len, iob);
QETH_CARD_TEXT(card, 6, "osnoirqp");
spin_lock_irqsave(get_ccwdev_lock(card->write.ccwdev), flags);
rc = ccw_device_start_timeout(CARD_WDEV(card), &card->write.ccw,
(addr_t) iob, 0, 0, QETH_IPA_TIMEOUT);
spin_unlock_irqrestore(get_ccwdev_lock(card->write.ccwdev), flags);
if (rc) {
QETH_DBF_MESSAGE(2, "qeth_osn_send_control_data: "
"ccw_device_start rc = %i\n", rc);
QETH_CARD_TEXT_(card, 2, " err%d", rc);
qeth_release_buffer(iob->channel, iob);
atomic_set(&card->write.irq_pending, 0);
wake_up(&card->wait_q);
}
return rc;
}
static int qeth_osn_send_ipa_cmd(struct qeth_card *card,
struct qeth_cmd_buffer *iob, int data_len)
{
u16 s1, s2;
QETH_CARD_TEXT(card, 4, "osndipa");
qeth_prepare_ipa_cmd(card, iob, QETH_PROT_OSN2);
s1 = (u16)(IPA_PDU_HEADER_SIZE + data_len);
s2 = (u16)data_len;
memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &s1, 2);
memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &s2, 2);
memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &s2, 2);
memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &s2, 2);
return qeth_osn_send_control_data(card, s1, iob);
}
int qeth_osn_assist(struct net_device *dev, void *data, int data_len)
{
struct qeth_cmd_buffer *iob;
struct qeth_card *card;
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->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);
}
EXPORT_SYMBOL_GPL(qeth_bridgeport_query_ports);
static int qeth_bridgeport_set_cb(struct qeth_card *card,
struct qeth_reply *reply, unsigned long data)
{
struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
struct _qeth_sbp_cbctl *cbctl = (struct _qeth_sbp_cbctl *)reply->param;
QETH_CARD_TEXT(card, 2, "brsetrcb");
cbctl->ipa_rc = cmd->hdr.return_code;
cbctl->cmd_rc = cmd->data.sbp.hdr.return_code;
return 0;
}
/**
* qeth_bridgeport_setrole() - Assign primary role to the port.
* @card: qeth_card structure pointer.
* @role: Role to assign.
*
* Returns negative errno-compatible error indication or 0 on success.
*/
int qeth_bridgeport_setrole(struct qeth_card *card, enum qeth_sbp_roles role)
{
int rc = 0;
int cmdlength;
struct qeth_cmd_buffer *iob;
struct _qeth_sbp_cbctl cbctl;
enum qeth_ipa_sbp_cmd setcmd;
QETH_CARD_TEXT(card, 2, "brsetrol");
switch (role) {
case QETH_SBP_ROLE_NONE:
setcmd = IPA_SBP_RESET_BRIDGE_PORT_ROLE;
cmdlength = sizeof(struct qeth_sbp_reset_role);
break;
case QETH_SBP_ROLE_PRIMARY:
setcmd = IPA_SBP_SET_PRIMARY_BRIDGE_PORT;
cmdlength = sizeof(struct qeth_sbp_set_primary);
break;
case QETH_SBP_ROLE_SECONDARY:
setcmd = IPA_SBP_SET_SECONDARY_BRIDGE_PORT;
cmdlength = sizeof(struct qeth_sbp_set_secondary);
break;
default:
return -EINVAL;
}
if (!(card->options.sbp.supported_funcs & setcmd))
return -EOPNOTSUPP;
iob = qeth_sbp_build_cmd(card, setcmd, cmdlength);
if (!iob)
return -ENOMEM;
rc = qeth_send_ipa_cmd(card, iob, qeth_bridgeport_set_cb,
(void *)&cbctl);
if (rc < 0)
return rc;
return qeth_bridgeport_makerc(card, &cbctl, setcmd);
}
/**
* qeth_anset_makerc() - derive "traditional" error from hardware codes.
* @card: qeth_card structure pointer, for debug messages.
*
* Returns negative errno-compatible error indication or 0 on success.
*/
static int qeth_anset_makerc(struct qeth_card *card, int pnso_rc, u16 response)
{
int rc;
if (pnso_rc == 0)
switch (response) {
case 0x0001:
rc = 0;
break;
case 0x0004:
case 0x0100:
case 0x0106:
rc = -EOPNOTSUPP;
dev_err(&card->gdev->dev,
"Setting address notification failed\n");
break;
case 0x0107:
rc = -EAGAIN;
break;
default:
rc = -EIO;
}
else
rc = -EIO;
if (rc) {
QETH_CARD_TEXT_(card, 2, "SBPp%04x", pnso_rc);
QETH_CARD_TEXT_(card, 2, "SBPr%04x", response);
}
return rc;
}
static void qeth_bridgeport_an_set_cb(void *priv,
enum qdio_brinfo_entry_type type, void *entry)
{
struct qeth_card *card = (struct qeth_card *)priv;
struct qdio_brinfo_entry_l2 *l2entry;
u8 code;
if (type != l2_addr_lnid) {
WARN_ON_ONCE(1);
return;
}
l2entry = (struct qdio_brinfo_entry_l2 *)entry;
code = IPA_ADDR_CHANGE_CODE_MACADDR;
if (l2entry->addr_lnid.lnid)
code |= IPA_ADDR_CHANGE_CODE_VLANID;
qeth_bridge_emit_host_event(card, anev_reg_unreg, code,
(struct net_if_token *)&l2entry->nit,
(struct mac_addr_lnid *)&l2entry->addr_lnid);
}
/**
* qeth_bridgeport_an_set() - Enable or disable bridgeport address notification
* @card: qeth_card structure pointer.
* @enable: 0 - disable, non-zero - enable notifications
*
* Returns negative errno-compatible error indication or 0 on success.
*
* On enable, emits a series of address notifications udev events for all
* currently registered hosts.
*/
int qeth_bridgeport_an_set(struct qeth_card *card, int enable)
{
int rc;
u16 response;
struct ccw_device *ddev;
struct subchannel_id schid;
if (!card)
return -EINVAL;
if (!card->options.sbp.supported_funcs)
return -EOPNOTSUPP;
ddev = CARD_DDEV(card);
ccw_device_get_schid(ddev, &schid);
if (enable) {
qeth_bridge_emit_host_event(card, anev_reset, 0, NULL, NULL);
rc = qdio_pnso_brinfo(schid, 1, &response,
qeth_bridgeport_an_set_cb, card);
} else
rc = qdio_pnso_brinfo(schid, 0, &response, NULL, NULL);
return qeth_anset_makerc(card, rc, response);
}
EXPORT_SYMBOL_GPL(qeth_bridgeport_an_set);
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");
/* do not change anything if BridgePort is enabled */
if (qeth_bridgeport_is_in_use(card))
return -EBUSY;
/* check if characteristic and enable/disable are supported */
if (!(card->options.vnicc.sup_chars & vnicc) ||
!(card->options.vnicc.set_char_sup & vnicc))
return -EOPNOTSUPP;
/* 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");
/* do not get anything if BridgePort is enabled */
if (qeth_bridgeport_is_in_use(card))
return -EBUSY;
/* check if characteristic is supported */
if (!(card->options.vnicc.sup_chars & vnicc))
return -EOPNOTSUPP;
/* 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");
/* do not change anything if BridgePort is enabled */
if (qeth_bridgeport_is_in_use(card))
return -EBUSY;
/* 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;
/* 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");
/* do not get anything if BridgePort is enabled */
if (qeth_bridgeport_is_in_use(card))
return -EBUSY;
/* 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 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 everything is turned off, VNICC is not active */
if (!card->options.vnicc.cur_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;
unsigned int chars_len, i;
unsigned long chars_tmp;
u32 sup_cmds, vnicc;
bool enable, error;
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);
qeth_l2_vnicc_query_cmds(card, vnicc, &sup_cmds);
if (!(sup_cmds & IPA_VNICC_SET_TIMEOUT) ||
!(sup_cmds & IPA_VNICC_GET_TIMEOUT))
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;
}
/* 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_tmp |= QETH_VNICC_BRIDGE_INVISIBLE;
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");
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