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kernel/drivers/s390/net/qeth_l2_main.c
tqcq e5480701d3 init repo.
2024-07-22 17:22:30 +08:00

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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/if_bridge.h>
#include <linux/list.h>
#include <linux/hash.h>
#include <linux/hashtable.h>
#include <net/switchdev.h>
#include <asm/chsc.h>
#include <asm/css_chars.h>
#include <asm/setup.h>
#include "qeth_core.h"
#include "qeth_l2.h"
static int qeth_l2_setdelmac_makerc(struct qeth_card *card, u16 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 = -EADDRINUSE;
break;
case IPA_RC_L2_MAC_NOT_AUTH_BY_HYP:
case IPA_RC_L2_MAC_NOT_AUTH_BY_ADP:
rc = -EADDRNOTAVAIL;
break;
case IPA_RC_L2_MAC_NOT_FOUND:
rc = -ENOENT;
break;
default:
rc = -EIO;
break;
}
return rc;
}
static int qeth_l2_send_setdelmac_cb(struct qeth_card *card,
struct qeth_reply *reply,
unsigned long data)
{
struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
return qeth_l2_setdelmac_makerc(card, cmd->hdr.return_code);
}
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_ipa_alloc_cmd(card, ipacmd, QETH_PROT_IPV4,
IPA_DATA_SIZEOF(setdelmac));
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_send_ipa_cmd(card, iob, qeth_l2_send_setdelmac_cb, 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\n", mac);
} else {
switch (rc) {
case -EADDRINUSE:
dev_warn(&card->gdev->dev,
"MAC address %pM already exists\n", mac);
break;
case -EADDRNOTAVAIL:
dev_warn(&card->gdev->dev,
"MAC address %pM is not authorized\n", mac);
break;
}
}
return rc;
}
static int qeth_l2_write_mac(struct qeth_card *card, u8 *mac)
{
enum qeth_ipa_cmds cmd = is_multicast_ether_addr(mac) ?
IPA_CMD_SETGMAC : IPA_CMD_SETVMAC;
int rc;
QETH_CARD_TEXT(card, 2, "L2Wmac");
rc = qeth_l2_send_setdelmac(card, mac, cmd);
if (rc == -EADDRINUSE)
QETH_DBF_MESSAGE(2, "MAC already registered on device %x\n",
CARD_DEVID(card));
else if (rc)
QETH_DBF_MESSAGE(2, "Failed to register MAC on device %x: %d\n",
CARD_DEVID(card), rc);
return rc;
}
static int qeth_l2_remove_mac(struct qeth_card *card, u8 *mac)
{
enum qeth_ipa_cmds cmd = is_multicast_ether_addr(mac) ?
IPA_CMD_DELGMAC : IPA_CMD_DELVMAC;
int rc;
QETH_CARD_TEXT(card, 2, "L2Rmac");
rc = qeth_l2_send_setdelmac(card, mac, cmd);
if (rc)
QETH_DBF_MESSAGE(2, "Failed to delete MAC on device %u: %d\n",
CARD_DEVID(card), rc);
return rc;
}
static void qeth_l2_drain_rx_mode_cache(struct qeth_card *card)
{
struct qeth_mac *mac;
struct hlist_node *tmp;
int i;
hash_for_each_safe(card->rx_mode_addrs, i, tmp, mac, hnode) {
hash_del(&mac->hnode);
kfree(mac);
}
}
static void qeth_l2_fill_header(struct qeth_qdio_out_q *queue,
struct qeth_hdr *hdr, struct sk_buff *skb,
__be16 proto, unsigned int data_len)
{
int cast_type = qeth_get_ether_cast_type(skb);
struct vlan_ethhdr *veth = vlan_eth_hdr(skb);
hdr->hdr.l2.pkt_length = data_len;
if (skb_is_gso(skb)) {
hdr->hdr.l2.id = QETH_HEADER_TYPE_L2_TSO;
} else {
hdr->hdr.l2.id = QETH_HEADER_TYPE_LAYER2;
if (skb->ip_summed == CHECKSUM_PARTIAL)
qeth_tx_csum(skb, &hdr->hdr.l2.flags[1], proto);
}
/* 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 == 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_setdelvlan_makerc(struct qeth_card *card, u16 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;
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 %u on device %x: %#x.\n",
cmd->data.setdelvlan.vlan_id,
CARD_DEVID(card), cmd->hdr.return_code);
QETH_CARD_TEXT_(card, 2, "L2VL%4x", cmd->hdr.command);
}
return qeth_l2_setdelvlan_makerc(card, cmd->hdr.return_code);
}
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_ipa_alloc_cmd(card, ipacmd, QETH_PROT_IPV4,
IPA_DATA_SIZEOF(setdelvlan));
if (!iob)
return -ENOMEM;
cmd = __ipa_cmd(iob);
cmd->data.setdelvlan.vlan_id = i;
return qeth_send_ipa_cmd(card, iob, qeth_l2_send_setdelvlan_cb, NULL);
}
static int qeth_l2_vlan_rx_add_vid(struct net_device *dev,
__be16 proto, u16 vid)
{
struct qeth_card *card = dev->ml_priv;
QETH_CARD_TEXT_(card, 4, "aid:%d", vid);
if (!vid)
return 0;
return qeth_l2_send_setdelvlan(card, vid, IPA_CMD_SETVLAN);
}
static int qeth_l2_vlan_rx_kill_vid(struct net_device *dev,
__be16 proto, u16 vid)
{
struct qeth_card *card = dev->ml_priv;
QETH_CARD_TEXT_(card, 4, "kid:%d", vid);
if (!vid)
return 0;
return qeth_l2_send_setdelvlan(card, vid, IPA_CMD_DELVLAN);
}
static void qeth_l2_set_pnso_mode(struct qeth_card *card,
enum qeth_pnso_mode mode)
{
spin_lock_irq(get_ccwdev_lock(CARD_RDEV(card)));
WRITE_ONCE(card->info.pnso_mode, mode);
spin_unlock_irq(get_ccwdev_lock(CARD_RDEV(card)));
if (mode == QETH_PNSO_NONE)
drain_workqueue(card->event_wq);
}
static void qeth_l2_dev2br_fdb_flush(struct qeth_card *card)
{
struct switchdev_notifier_fdb_info info = {};
QETH_CARD_TEXT(card, 2, "fdbflush");
info.addr = NULL;
/* flush all VLANs: */
info.vid = 0;
info.added_by_user = false;
info.offloaded = true;
call_switchdev_notifiers(SWITCHDEV_FDB_FLUSH_TO_BRIDGE,
card->dev, &info.info, NULL);
}
static int qeth_l2_request_initial_mac(struct qeth_card *card)
{
int rc = 0;
QETH_CARD_TEXT(card, 2, "l2reqmac");
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 %x: %#x\n",
CARD_DEVID(card), rc);
QETH_CARD_TEXT_(card, 2, "err%04x", rc);
/* fall back to alternative mechanism: */
}
rc = qeth_setadpparms_change_macaddr(card);
if (!rc)
goto out;
QETH_DBF_MESSAGE(2, "READ_MAC Assist failed on device %x: %#x\n",
CARD_DEVID(card), rc);
QETH_CARD_TEXT_(card, 2, "1err%04x", rc);
/* Fall back once more, but some devices don't support a custom MAC
* address:
*/
if (IS_OSM(card) || IS_OSX(card))
return (rc) ? rc : -EADDRNOTAVAIL;
eth_hw_addr_random(card->dev);
out:
QETH_CARD_HEX(card, 2, card->dev->dev_addr, card->dev->addr_len);
return 0;
}
static void qeth_l2_register_dev_addr(struct qeth_card *card)
{
if (!is_valid_ether_addr(card->dev->dev_addr))
qeth_l2_request_initial_mac(card);
if (!qeth_l2_send_setmac(card, card->dev->dev_addr))
card->info.dev_addr_is_registered = 1;
else
card->info.dev_addr_is_registered = 0;
}
static int qeth_l2_validate_addr(struct net_device *dev)
{
struct qeth_card *card = dev->ml_priv;
if (card->info.dev_addr_is_registered)
return eth_validate_addr(dev);
QETH_CARD_TEXT(card, 4, "nomacadr");
return -EPERM;
}
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 (IS_OSM(card) || IS_OSX(card)) {
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;
/* don't register the same address twice */
if (ether_addr_equal_64bits(dev->dev_addr, addr->sa_data) &&
card->info.dev_addr_is_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.dev_addr_is_registered)
qeth_l2_remove_mac(card, old_addr);
card->info.dev_addr_is_registered = 1;
return 0;
}
static void qeth_l2_promisc_to_bridge(struct qeth_card *card, bool enable)
{
int role;
int rc;
QETH_CARD_TEXT(card, 3, "pmisc2br");
if (enable) {
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_CARD_TEXT_(card, 2, "bpm%c%04x", enable ? '+' : '-', rc);
if (!rc) {
card->options.sbp.role = role;
card->info.promisc_mode = enable;
}
}
static void qeth_l2_set_promisc_mode(struct qeth_card *card)
{
bool enable = card->dev->flags & IFF_PROMISC;
if (card->info.promisc_mode == enable)
return;
if (qeth_adp_supported(card, IPA_SETADP_SET_PROMISC_MODE)) {
qeth_setadp_promisc_mode(card, enable);
} else {
mutex_lock(&card->sbp_lock);
if (card->options.sbp.reflect_promisc)
qeth_l2_promisc_to_bridge(card, enable);
mutex_unlock(&card->sbp_lock);
}
}
/* 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->rx_mode_addrs, 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->rx_mode_addrs, &mac->hnode, mac_hash);
}
static void qeth_l2_rx_mode_work(struct work_struct *work)
{
struct qeth_card *card = container_of(work, struct qeth_card,
rx_mode_work);
struct net_device *dev = card->dev;
struct netdev_hw_addr *ha;
struct qeth_mac *mac;
struct hlist_node *tmp;
int i;
int rc;
QETH_CARD_TEXT(card, 3, "setmulti");
netif_addr_lock_bh(dev);
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);
netif_addr_unlock_bh(dev);
hash_for_each_safe(card->rx_mode_addrs, 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;
}
fallthrough;
default:
/* for next call to set_rx_mode(): */
mac->disp_flag = QETH_DISP_ADDR_DELETE;
}
}
qeth_l2_set_promisc_mode(card);
}
static netdev_tx_t qeth_l2_hard_start_xmit(struct sk_buff *skb,
struct net_device *dev)
{
struct qeth_card *card = dev->ml_priv;
u16 txq = skb_get_queue_mapping(skb);
struct qeth_qdio_out_q *queue;
int rc;
if (!skb_is_gso(skb))
qdisc_skb_cb(skb)->pkt_len = skb->len;
if (IS_IQD(card))
txq = qeth_iqd_translate_txq(dev, txq);
queue = card->qdio.out_qs[txq];
rc = qeth_xmit(card, skb, queue, vlan_get_protocol(skb),
qeth_l2_fill_header);
if (!rc)
return NETDEV_TX_OK;
QETH_TXQ_STAT_INC(queue, tx_dropped);
kfree_skb(skb);
return NETDEV_TX_OK;
}
static u16 qeth_l2_select_queue(struct net_device *dev, struct sk_buff *skb,
struct net_device *sb_dev)
{
struct qeth_card *card = dev->ml_priv;
if (IS_IQD(card))
return qeth_iqd_select_queue(dev, skb,
qeth_get_ether_cast_type(skb),
sb_dev);
if (qeth_uses_tx_prio_queueing(card))
return qeth_get_priority_queue(card, skb);
return netdev_pick_tx(dev, skb, sb_dev);
}
static void qeth_l2_set_rx_mode(struct net_device *dev)
{
struct qeth_card *card = dev->ml_priv;
schedule_work(&card->rx_mode_work);
}
/**
* qeth_l2_pnso() - perform network subchannel operation
* @card: qeth_card structure pointer
* @oc: Operation Code
* @cnc: Boolean Change-Notification Control
* @cb: Callback function will be executed for each element
* of the address list
* @priv: Pointer to pass to the callback function.
*
* Collects network information in a network address list and calls the
* callback function for every entry in the list. If "change-notification-
* control" is set, further changes in the address list will be reported
* via the IPA command.
*/
static int qeth_l2_pnso(struct qeth_card *card, u8 oc, int cnc,
void (*cb)(void *priv, struct chsc_pnso_naid_l2 *entry),
void *priv)
{
struct ccw_device *ddev = CARD_DDEV(card);
struct chsc_pnso_area *rr;
u32 prev_instance = 0;
int isfirstblock = 1;
int i, size, elems;
int rc;
rr = (struct chsc_pnso_area *)get_zeroed_page(GFP_KERNEL);
if (rr == NULL)
return -ENOMEM;
do {
QETH_CARD_TEXT(card, 2, "PNSO");
/* on the first iteration, naihdr.resume_token will be zero */
rc = ccw_device_pnso(ddev, rr, oc, rr->naihdr.resume_token,
cnc);
if (rc)
continue;
if (cb == NULL)
continue;
size = rr->naihdr.naids;
if (size != sizeof(struct chsc_pnso_naid_l2)) {
WARN_ON_ONCE(1);
continue;
}
elems = (rr->response.length - sizeof(struct chsc_header) -
sizeof(struct chsc_pnso_naihdr)) / size;
if (!isfirstblock && (rr->naihdr.instance != prev_instance)) {
/* Inform the caller that they need to scrap */
/* the data that was already reported via cb */
rc = -EAGAIN;
break;
}
isfirstblock = 0;
prev_instance = rr->naihdr.instance;
for (i = 0; i < elems; i++)
(*cb)(priv, &rr->entries[i]);
} while ((rc == -EBUSY) || (!rc && /* list stored */
/* resume token is non-zero => list incomplete */
(rr->naihdr.resume_token.t1 || rr->naihdr.resume_token.t2)));
if (rc)
QETH_CARD_TEXT_(card, 2, "PNrp%04x", rr->response.code);
free_page((unsigned long)rr);
return rc;
}
static bool qeth_is_my_net_if_token(struct qeth_card *card,
struct net_if_token *token)
{
return ((card->info.ddev_devno == token->devnum) &&
(card->info.cssid == token->cssid) &&
(card->info.iid == token->iid) &&
(card->info.ssid == token->ssid) &&
(card->info.chpid == token->chpid) &&
(card->info.chid == token->chid));
}
/**
* qeth_l2_dev2br_fdb_notify() - update fdb of master bridge
* @card: qeth_card structure pointer
* @code: event bitmask: high order bit 0x80 set to
* 1 - removal of an object
* 0 - addition of an object
* Object type(s):
* 0x01 - VLAN, 0x02 - MAC, 0x03 - VLAN and MAC
* @token: "network token" structure identifying 'physical' location
* of the target
* @addr_lnid: structure with MAC address and VLAN ID of the target
*/
static void qeth_l2_dev2br_fdb_notify(struct qeth_card *card, u8 code,
struct net_if_token *token,
struct mac_addr_lnid *addr_lnid)
{
struct switchdev_notifier_fdb_info info = {};
u8 ntfy_mac[ETH_ALEN];
ether_addr_copy(ntfy_mac, addr_lnid->mac);
/* Ignore VLAN only changes */
if (!(code & IPA_ADDR_CHANGE_CODE_MACADDR))
return;
/* Ignore mcast entries */
if (is_multicast_ether_addr(ntfy_mac))
return;
/* Ignore my own addresses */
if (qeth_is_my_net_if_token(card, token))
return;
info.addr = ntfy_mac;
/* don't report VLAN IDs */
info.vid = 0;
info.added_by_user = false;
info.offloaded = true;
if (code & IPA_ADDR_CHANGE_CODE_REMOVAL) {
call_switchdev_notifiers(SWITCHDEV_FDB_DEL_TO_BRIDGE,
card->dev, &info.info, NULL);
QETH_CARD_TEXT(card, 4, "andelmac");
QETH_CARD_TEXT_(card, 4,
"mc%012llx", ether_addr_to_u64(ntfy_mac));
} else {
call_switchdev_notifiers(SWITCHDEV_FDB_ADD_TO_BRIDGE,
card->dev, &info.info, NULL);
QETH_CARD_TEXT(card, 4, "anaddmac");
QETH_CARD_TEXT_(card, 4,
"mc%012llx", ether_addr_to_u64(ntfy_mac));
}
}
static void qeth_l2_dev2br_an_set_cb(void *priv,
struct chsc_pnso_naid_l2 *entry)
{
u8 code = IPA_ADDR_CHANGE_CODE_MACADDR;
struct qeth_card *card = priv;
if (entry->addr_lnid.lnid < VLAN_N_VID)
code |= IPA_ADDR_CHANGE_CODE_VLANID;
qeth_l2_dev2br_fdb_notify(card, code,
(struct net_if_token *)&entry->nit,
(struct mac_addr_lnid *)&entry->addr_lnid);
}
/**
* qeth_l2_dev2br_an_set() -
* Enable or disable 'dev to bridge network address notification'
* @card: qeth_card structure pointer
* @enable: Enable or disable 'dev to bridge network address notification'
*
* Returns negative errno-compatible error indication or 0 on success.
*
* On enable, emits a series of address notifications for all
* currently registered hosts.
*/
static int qeth_l2_dev2br_an_set(struct qeth_card *card, bool enable)
{
int rc;
if (enable) {
QETH_CARD_TEXT(card, 2, "anseton");
rc = qeth_l2_pnso(card, PNSO_OC_NET_ADDR_INFO, 1,
qeth_l2_dev2br_an_set_cb, card);
if (rc == -EAGAIN)
/* address notification enabled, but inconsistent
* addresses reported -> disable address notification
*/
qeth_l2_pnso(card, PNSO_OC_NET_ADDR_INFO, 0,
NULL, NULL);
} else {
QETH_CARD_TEXT(card, 2, "ansetoff");
rc = qeth_l2_pnso(card, PNSO_OC_NET_ADDR_INFO, 0, NULL, NULL);
}
return rc;
}
struct qeth_l2_br2dev_event_work {
struct work_struct work;
struct net_device *br_dev;
struct net_device *lsync_dev;
struct net_device *dst_dev;
unsigned long event;
unsigned char addr[ETH_ALEN];
};
static const struct net_device_ops qeth_l2_netdev_ops;
static bool qeth_l2_must_learn(struct net_device *netdev,
struct net_device *dstdev)
{
struct qeth_priv *priv;
priv = netdev_priv(netdev);
return (netdev != dstdev &&
(priv->brport_features & BR_LEARNING_SYNC) &&
!(br_port_flag_is_set(netdev, BR_ISOLATED) &&
br_port_flag_is_set(dstdev, BR_ISOLATED)) &&
netdev->netdev_ops == &qeth_l2_netdev_ops);
}
/**
* qeth_l2_br2dev_worker() - update local MACs
* @work: bridge to device FDB update
*
* Update local MACs of a learning_sync bridgeport so it can receive
* messages for a destination port.
* In case of an isolated learning_sync port, also update its isolated
* siblings.
*/
static void qeth_l2_br2dev_worker(struct work_struct *work)
{
struct qeth_l2_br2dev_event_work *br2dev_event_work =
container_of(work, struct qeth_l2_br2dev_event_work, work);
struct net_device *lsyncdev = br2dev_event_work->lsync_dev;
struct net_device *dstdev = br2dev_event_work->dst_dev;
struct net_device *brdev = br2dev_event_work->br_dev;
unsigned long event = br2dev_event_work->event;
unsigned char *addr = br2dev_event_work->addr;
struct qeth_card *card = lsyncdev->ml_priv;
struct net_device *lowerdev;
struct list_head *iter;
int err = 0;
QETH_CARD_TEXT_(card, 4, "b2dw%04lx", event);
QETH_CARD_TEXT_(card, 4, "ma%012llx", ether_addr_to_u64(addr));
rcu_read_lock();
/* Verify preconditions are still valid: */
if (!netif_is_bridge_port(lsyncdev) ||
brdev != netdev_master_upper_dev_get_rcu(lsyncdev))
goto unlock;
if (!qeth_l2_must_learn(lsyncdev, dstdev))
goto unlock;
if (br_port_flag_is_set(lsyncdev, BR_ISOLATED)) {
/* Update lsyncdev and its isolated sibling(s): */
iter = &brdev->adj_list.lower;
lowerdev = netdev_next_lower_dev_rcu(brdev, &iter);
while (lowerdev) {
if (br_port_flag_is_set(lowerdev, BR_ISOLATED)) {
switch (event) {
case SWITCHDEV_FDB_ADD_TO_DEVICE:
err = dev_uc_add(lowerdev, addr);
break;
case SWITCHDEV_FDB_DEL_TO_DEVICE:
err = dev_uc_del(lowerdev, addr);
break;
default:
break;
}
if (err) {
QETH_CARD_TEXT(card, 2, "b2derris");
QETH_CARD_TEXT_(card, 2,
"err%02lx%03d", event,
lowerdev->ifindex);
}
}
lowerdev = netdev_next_lower_dev_rcu(brdev, &iter);
}
} else {
switch (event) {
case SWITCHDEV_FDB_ADD_TO_DEVICE:
err = dev_uc_add(lsyncdev, addr);
break;
case SWITCHDEV_FDB_DEL_TO_DEVICE:
err = dev_uc_del(lsyncdev, addr);
break;
default:
break;
}
if (err)
QETH_CARD_TEXT_(card, 2, "b2derr%02lx", event);
}
unlock:
rcu_read_unlock();
dev_put(brdev);
dev_put(lsyncdev);
dev_put(dstdev);
kfree(br2dev_event_work);
}
static int qeth_l2_br2dev_queue_work(struct net_device *brdev,
struct net_device *lsyncdev,
struct net_device *dstdev,
unsigned long event,
const unsigned char *addr)
{
struct qeth_l2_br2dev_event_work *worker_data;
struct qeth_card *card;
worker_data = kzalloc(sizeof(*worker_data), GFP_ATOMIC);
if (!worker_data)
return -ENOMEM;
INIT_WORK(&worker_data->work, qeth_l2_br2dev_worker);
worker_data->br_dev = brdev;
worker_data->lsync_dev = lsyncdev;
worker_data->dst_dev = dstdev;
worker_data->event = event;
ether_addr_copy(worker_data->addr, addr);
card = lsyncdev->ml_priv;
/* Take a reference on the sw port devices and the bridge */
dev_hold(brdev);
dev_hold(lsyncdev);
dev_hold(dstdev);
queue_work(card->event_wq, &worker_data->work);
return 0;
}
/* Called under rtnl_lock */
static int qeth_l2_switchdev_event(struct notifier_block *unused,
unsigned long event, void *ptr)
{
struct net_device *dstdev, *brdev, *lowerdev;
struct switchdev_notifier_fdb_info *fdb_info;
struct switchdev_notifier_info *info = ptr;
struct list_head *iter;
struct qeth_card *card;
int rc;
if (!(event == SWITCHDEV_FDB_ADD_TO_DEVICE ||
event == SWITCHDEV_FDB_DEL_TO_DEVICE))
return NOTIFY_DONE;
dstdev = switchdev_notifier_info_to_dev(info);
brdev = netdev_master_upper_dev_get_rcu(dstdev);
if (!brdev || !netif_is_bridge_master(brdev))
return NOTIFY_DONE;
fdb_info = container_of(info,
struct switchdev_notifier_fdb_info,
info);
iter = &brdev->adj_list.lower;
lowerdev = netdev_next_lower_dev_rcu(brdev, &iter);
while (lowerdev) {
if (qeth_l2_must_learn(lowerdev, dstdev)) {
card = lowerdev->ml_priv;
QETH_CARD_TEXT_(card, 4, "b2dqw%03lx", event);
rc = qeth_l2_br2dev_queue_work(brdev, lowerdev,
dstdev, event,
fdb_info->addr);
if (rc) {
QETH_CARD_TEXT(card, 2, "b2dqwerr");
return NOTIFY_BAD;
}
}
lowerdev = netdev_next_lower_dev_rcu(brdev, &iter);
}
return NOTIFY_DONE;
}
static struct notifier_block qeth_l2_sw_notifier = {
.notifier_call = qeth_l2_switchdev_event,
};
static refcount_t qeth_l2_switchdev_notify_refcnt;
/* Called under rtnl_lock */
static void qeth_l2_br2dev_get(void)
{
int rc;
if (!refcount_inc_not_zero(&qeth_l2_switchdev_notify_refcnt)) {
rc = register_switchdev_notifier(&qeth_l2_sw_notifier);
if (rc) {
QETH_DBF_MESSAGE(2,
"failed to register qeth_l2_sw_notifier: %d\n",
rc);
} else {
refcount_set(&qeth_l2_switchdev_notify_refcnt, 1);
QETH_DBF_MESSAGE(2, "qeth_l2_sw_notifier registered\n");
}
}
QETH_DBF_TEXT_(SETUP, 2, "b2d+%04d",
qeth_l2_switchdev_notify_refcnt.refs.counter);
}
/* Called under rtnl_lock */
static void qeth_l2_br2dev_put(void)
{
int rc;
if (refcount_dec_and_test(&qeth_l2_switchdev_notify_refcnt)) {
rc = unregister_switchdev_notifier(&qeth_l2_sw_notifier);
if (rc) {
QETH_DBF_MESSAGE(2,
"failed to unregister qeth_l2_sw_notifier: %d\n",
rc);
} else {
QETH_DBF_MESSAGE(2,
"qeth_l2_sw_notifier unregistered\n");
}
}
QETH_DBF_TEXT_(SETUP, 2, "b2d-%04d",
qeth_l2_switchdev_notify_refcnt.refs.counter);
}
static int qeth_l2_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
struct net_device *dev, u32 filter_mask,
int nlflags)
{
struct qeth_priv *priv = netdev_priv(dev);
struct qeth_card *card = dev->ml_priv;
u16 mode = BRIDGE_MODE_UNDEF;
/* Do not even show qeth devs that cannot do bridge_setlink */
if (!priv->brport_hw_features || !netif_device_present(dev) ||
qeth_bridgeport_is_in_use(card))
return -EOPNOTSUPP;
return ndo_dflt_bridge_getlink(skb, pid, seq, dev,
mode, priv->brport_features,
priv->brport_hw_features,
nlflags, filter_mask, NULL);
}
static const struct nla_policy qeth_brport_policy[IFLA_BRPORT_MAX + 1] = {
[IFLA_BRPORT_LEARNING_SYNC] = { .type = NLA_U8 },
};
/**
* qeth_l2_bridge_setlink() - set bridgeport attributes
* @dev: netdevice
* @nlh: netlink message header
* @flags: bridge flags (here: BRIDGE_FLAGS_SELF)
* @extack: extended ACK report struct
*
* Called under rtnl_lock
*/
static int qeth_l2_bridge_setlink(struct net_device *dev, struct nlmsghdr *nlh,
u16 flags, struct netlink_ext_ack *extack)
{
struct qeth_priv *priv = netdev_priv(dev);
struct nlattr *bp_tb[IFLA_BRPORT_MAX + 1];
struct qeth_card *card = dev->ml_priv;
struct nlattr *attr, *nested_attr;
bool enable, has_protinfo = false;
int rem1, rem2;
int rc;
if (!netif_device_present(dev))
return -ENODEV;
nlmsg_for_each_attr(attr, nlh, sizeof(struct ifinfomsg), rem1) {
if (nla_type(attr) == IFLA_PROTINFO) {
rc = nla_parse_nested(bp_tb, IFLA_BRPORT_MAX, attr,
qeth_brport_policy, extack);
if (rc)
return rc;
has_protinfo = true;
} else if (nla_type(attr) == IFLA_AF_SPEC) {
nla_for_each_nested(nested_attr, attr, rem2) {
if (nla_type(nested_attr) == IFLA_BRIDGE_FLAGS)
continue;
NL_SET_ERR_MSG_ATTR(extack, nested_attr,
"Unsupported attribute");
return -EINVAL;
}
} else {
NL_SET_ERR_MSG_ATTR(extack, attr, "Unsupported attribute");
return -EINVAL;
}
}
if (!has_protinfo)
return 0;
if (!bp_tb[IFLA_BRPORT_LEARNING_SYNC])
return -EINVAL;
if (!(priv->brport_hw_features & BR_LEARNING_SYNC)) {
NL_SET_ERR_MSG_ATTR(extack, bp_tb[IFLA_BRPORT_LEARNING_SYNC],
"Operation not supported by HW");
return -EOPNOTSUPP;
}
if (!IS_ENABLED(CONFIG_NET_SWITCHDEV)) {
NL_SET_ERR_MSG_ATTR(extack, bp_tb[IFLA_BRPORT_LEARNING_SYNC],
"Requires NET_SWITCHDEV");
return -EOPNOTSUPP;
}
enable = !!nla_get_u8(bp_tb[IFLA_BRPORT_LEARNING_SYNC]);
if (enable == !!(priv->brport_features & BR_LEARNING_SYNC))
return 0;
mutex_lock(&card->sbp_lock);
/* do not change anything if BridgePort is enabled */
if (qeth_bridgeport_is_in_use(card)) {
NL_SET_ERR_MSG(extack, "n/a (BridgePort)");
rc = -EBUSY;
} else if (enable) {
qeth_l2_set_pnso_mode(card, QETH_PNSO_ADDR_INFO);
rc = qeth_l2_dev2br_an_set(card, true);
if (rc) {
qeth_l2_set_pnso_mode(card, QETH_PNSO_NONE);
} else {
priv->brport_features |= BR_LEARNING_SYNC;
qeth_l2_br2dev_get();
}
} else {
rc = qeth_l2_dev2br_an_set(card, false);
if (!rc) {
qeth_l2_set_pnso_mode(card, QETH_PNSO_NONE);
priv->brport_features ^= BR_LEARNING_SYNC;
qeth_l2_dev2br_fdb_flush(card);
qeth_l2_br2dev_put();
}
}
mutex_unlock(&card->sbp_lock);
return rc;
}
static const struct net_device_ops qeth_l2_netdev_ops = {
.ndo_open = qeth_open,
.ndo_stop = qeth_stop,
.ndo_get_stats64 = qeth_get_stats64,
.ndo_start_xmit = qeth_l2_hard_start_xmit,
.ndo_features_check = qeth_features_check,
.ndo_select_queue = qeth_l2_select_queue,
.ndo_validate_addr = qeth_l2_validate_addr,
.ndo_set_rx_mode = qeth_l2_set_rx_mode,
.ndo_eth_ioctl = qeth_do_ioctl,
.ndo_siocdevprivate = qeth_siocdevprivate,
.ndo_set_mac_address = qeth_l2_set_mac_address,
.ndo_vlan_rx_add_vid = qeth_l2_vlan_rx_add_vid,
.ndo_vlan_rx_kill_vid = qeth_l2_vlan_rx_kill_vid,
.ndo_tx_timeout = qeth_tx_timeout,
.ndo_fix_features = qeth_fix_features,
.ndo_set_features = qeth_set_features,
.ndo_bridge_getlink = qeth_l2_bridge_getlink,
.ndo_bridge_setlink = qeth_l2_bridge_setlink,
};
static int qeth_l2_setup_netdev(struct qeth_card *card)
{
card->dev->needed_headroom = sizeof(struct qeth_hdr);
card->dev->netdev_ops = &qeth_l2_netdev_ops;
card->dev->priv_flags |= IFF_UNICAST_FLT;
if (IS_OSM(card)) {
card->dev->features |= NETIF_F_VLAN_CHALLENGED;
} else {
if (!IS_VM_NIC(card))
card->dev->hw_features |= NETIF_F_HW_VLAN_CTAG_FILTER;
card->dev->features |= NETIF_F_HW_VLAN_CTAG_FILTER;
}
if (IS_OSD(card) && !IS_VM_NIC(card)) {
card->dev->features |= NETIF_F_SG;
/* OSA 3S and earlier has no RX/TX support */
if (qeth_is_supported(card, IPA_OUTBOUND_CHECKSUM)) {
card->dev->hw_features |= NETIF_F_IP_CSUM;
card->dev->vlan_features |= NETIF_F_IP_CSUM;
}
}
if (qeth_is_supported6(card, IPA_OUTBOUND_CHECKSUM_V6)) {
card->dev->hw_features |= NETIF_F_IPV6_CSUM;
card->dev->vlan_features |= NETIF_F_IPV6_CSUM;
}
if (qeth_is_supported(card, IPA_INBOUND_CHECKSUM) ||
qeth_is_supported6(card, IPA_INBOUND_CHECKSUM_V6)) {
card->dev->hw_features |= NETIF_F_RXCSUM;
card->dev->vlan_features |= NETIF_F_RXCSUM;
}
if (qeth_is_supported(card, IPA_OUTBOUND_TSO)) {
card->dev->hw_features |= NETIF_F_TSO;
card->dev->vlan_features |= NETIF_F_TSO;
}
if (qeth_is_supported6(card, IPA_OUTBOUND_TSO)) {
card->dev->hw_features |= NETIF_F_TSO6;
card->dev->vlan_features |= NETIF_F_TSO6;
}
if (card->dev->hw_features & (NETIF_F_TSO | NETIF_F_TSO6)) {
card->dev->needed_headroom = sizeof(struct qeth_hdr_tso);
netif_keep_dst(card->dev);
netif_set_gso_max_size(card->dev,
PAGE_SIZE * (QDIO_MAX_ELEMENTS_PER_BUFFER - 1));
}
netif_napi_add(card->dev, &card->napi, qeth_poll, QETH_NAPI_WEIGHT);
return register_netdev(card->dev);
}
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 void qeth_l2_setup_bridgeport_attrs(struct qeth_card *card)
{
if (!card->options.sbp.reflect_promisc &&
card->options.sbp.role != QETH_SBP_ROLE_NONE) {
/* Conditional to avoid spurious error messages */
qeth_bridgeport_setrole(card, card->options.sbp.role);
/* Let the callback function refresh the stored role value. */
qeth_bridgeport_query_ports(card, &card->options.sbp.role,
NULL);
}
if (card->options.sbp.hostnotification) {
if (qeth_bridgeport_an_set(card, 1))
card->options.sbp.hostnotification = 0;
}
}
/**
* qeth_l2_detect_dev2br_support() -
* Detect whether this card supports 'dev to bridge fdb network address
* change notification' and thus can support the learning_sync bridgeport
* attribute
* @card: qeth_card structure pointer
*/
static void qeth_l2_detect_dev2br_support(struct qeth_card *card)
{
struct qeth_priv *priv = netdev_priv(card->dev);
bool dev2br_supported;
QETH_CARD_TEXT(card, 2, "d2brsup");
if (!IS_IQD(card))
return;
/* dev2br requires valid cssid,iid,chid */
dev2br_supported = card->info.ids_valid &&
css_general_characteristics.enarf;
QETH_CARD_TEXT_(card, 2, "D2Bsup%02x", dev2br_supported);
if (dev2br_supported)
priv->brport_hw_features |= BR_LEARNING_SYNC;
else
priv->brport_hw_features &= ~BR_LEARNING_SYNC;
}
static void qeth_l2_enable_brport_features(struct qeth_card *card)
{
struct qeth_priv *priv = netdev_priv(card->dev);
int rc;
if (priv->brport_features & BR_LEARNING_SYNC) {
if (priv->brport_hw_features & BR_LEARNING_SYNC) {
qeth_l2_set_pnso_mode(card, QETH_PNSO_ADDR_INFO);
rc = qeth_l2_dev2br_an_set(card, true);
if (rc == -EAGAIN) {
/* Recoverable error, retry once */
qeth_l2_set_pnso_mode(card, QETH_PNSO_NONE);
qeth_l2_dev2br_fdb_flush(card);
qeth_l2_set_pnso_mode(card, QETH_PNSO_ADDR_INFO);
rc = qeth_l2_dev2br_an_set(card, true);
}
if (rc) {
netdev_err(card->dev,
"failed to enable bridge learning_sync: %d\n",
rc);
qeth_l2_set_pnso_mode(card, QETH_PNSO_NONE);
qeth_l2_dev2br_fdb_flush(card);
priv->brport_features ^= BR_LEARNING_SYNC;
}
} else {
dev_warn(&card->gdev->dev,
"bridge learning_sync not supported\n");
priv->brport_features ^= BR_LEARNING_SYNC;
}
}
}
/* 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;
u8 role;
u8 state;
};
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);
char env_locrem[32];
char env_role[32];
char env_state[32];
char *env[] = {
env_locrem,
env_role,
env_state,
NULL
};
snprintf(env_locrem, sizeof(env_locrem), "BRIDGEPORT=statechange");
snprintf(env_role, sizeof(env_role), "ROLE=%s",
(data->role == QETH_SBP_ROLE_NONE) ? "none" :
(data->role == QETH_SBP_ROLE_PRIMARY) ? "primary" :
(data->role == QETH_SBP_ROLE_SECONDARY) ? "secondary" :
"<INVALID>");
snprintf(env_state, sizeof(env_state), "STATE=%s",
(data->state == QETH_SBP_STATE_INACTIVE) ? "inactive" :
(data->state == QETH_SBP_STATE_STANDBY) ? "standby" :
(data->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_port_data *qports = &cmd->data.sbp.data.port_data;
struct qeth_bridge_state_data *data;
QETH_CARD_TEXT(card, 2, "brstchng");
if (qports->num_entries == 0) {
QETH_CARD_TEXT(card, 2, "BPempty");
return;
}
if (qports->entry_length != sizeof(struct qeth_sbp_port_entry)) {
QETH_CARD_TEXT_(card, 2, "BPsz%04x", qports->entry_length);
return;
}
data = kzalloc(sizeof(*data), GFP_ATOMIC);
if (!data) {
QETH_CARD_TEXT(card, 2, "BPSalloc");
return;
}
INIT_WORK(&data->worker, qeth_bridge_state_change_worker);
data->card = card;
/* Information for the local port: */
data->role = qports->entry[0].role;
data->state = qports->entry[0].state;
queue_work(card->event_wq, &data->worker);
}
struct qeth_addr_change_data {
struct delayed_work dwork;
struct qeth_card *card;
struct qeth_ipacmd_addr_change ac_event;
};
static void qeth_l2_dev2br_worker(struct work_struct *work)
{
struct delayed_work *dwork = to_delayed_work(work);
struct qeth_addr_change_data *data;
struct qeth_card *card;
struct qeth_priv *priv;
unsigned int i;
int rc;
data = container_of(dwork, struct qeth_addr_change_data, dwork);
card = data->card;
priv = netdev_priv(card->dev);
QETH_CARD_TEXT(card, 4, "dev2brew");
if (READ_ONCE(card->info.pnso_mode) == QETH_PNSO_NONE)
goto free;
if (data->ac_event.lost_event_mask) {
/* Potential re-config in progress, try again later: */
if (!rtnl_trylock()) {
queue_delayed_work(card->event_wq, dwork,
msecs_to_jiffies(100));
return;
}
if (!netif_device_present(card->dev)) {
rtnl_unlock();
goto free;
}
QETH_DBF_MESSAGE(3,
"Address change notification overflow on device %x\n",
CARD_DEVID(card));
/* Card fdb and bridge fdb are out of sync, card has stopped
* notifications (no need to drain_workqueue). Purge all
* 'extern_learn' entries from the parent bridge and restart
* the notifications.
*/
qeth_l2_dev2br_fdb_flush(card);
rc = qeth_l2_dev2br_an_set(card, true);
if (rc) {
/* TODO: if we want to retry after -EAGAIN, be
* aware there could be stale entries in the
* workqueue now, that need to be drained.
* For now we give up:
*/
netdev_err(card->dev,
"bridge learning_sync failed to recover: %d\n",
rc);
WRITE_ONCE(card->info.pnso_mode,
QETH_PNSO_NONE);
/* To remove fdb entries reported by an_set: */
qeth_l2_dev2br_fdb_flush(card);
priv->brport_features ^= BR_LEARNING_SYNC;
} else {
QETH_DBF_MESSAGE(3,
"Address Notification resynced on device %x\n",
CARD_DEVID(card));
}
rtnl_unlock();
} else {
for (i = 0; i < data->ac_event.num_entries; i++) {
struct qeth_ipacmd_addr_change_entry *entry =
&data->ac_event.entry[i];
qeth_l2_dev2br_fdb_notify(card,
entry->change_code,
&entry->token,
&entry->addr_lnid);
}
}
free:
kfree(data);
}
static void qeth_addr_change_event_worker(struct work_struct *work)
{
struct delayed_work *dwork = to_delayed_work(work);
struct qeth_addr_change_data *data;
struct qeth_card *card;
int i;
data = container_of(dwork, struct qeth_addr_change_data, dwork);
card = data->card;
QETH_CARD_TEXT(data->card, 4, "adrchgew");
if (READ_ONCE(card->info.pnso_mode) == QETH_PNSO_NONE)
goto free;
if (data->ac_event.lost_event_mask) {
/* Potential re-config in progress, try again later: */
if (!mutex_trylock(&card->sbp_lock)) {
queue_delayed_work(card->event_wq, dwork,
msecs_to_jiffies(100));
return;
}
dev_info(&data->card->gdev->dev,
"Address change notification stopped on %s (%s)\n",
netdev_name(card->dev),
(data->ac_event.lost_event_mask == 0x01)
? "Overflow"
: (data->ac_event.lost_event_mask == 0x02)
? "Bridge port state change"
: "Unknown reason");
data->card->options.sbp.hostnotification = 0;
card->info.pnso_mode = QETH_PNSO_NONE;
mutex_unlock(&data->card->sbp_lock);
qeth_bridge_emit_host_event(data->card, anev_abort,
0, NULL, NULL);
} else
for (i = 0; i < data->ac_event.num_entries; i++) {
struct qeth_ipacmd_addr_change_entry *entry =
&data->ac_event.entry[i];
qeth_bridge_emit_host_event(data->card,
anev_reg_unreg,
entry->change_code,
&entry->token,
&entry->addr_lnid);
}
free:
kfree(data);
}
static void qeth_addr_change_event(struct qeth_card *card,
struct qeth_ipa_cmd *cmd)
{
struct qeth_ipacmd_addr_change *hostevs =
&cmd->data.addrchange;
struct qeth_addr_change_data *data;
int extrasize;
if (card->info.pnso_mode == QETH_PNSO_NONE)
return;
QETH_CARD_TEXT(card, 4, "adrchgev");
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, "ACHN%04x",
cmd->hdr.return_code);
return;
}
}
extrasize = sizeof(struct qeth_ipacmd_addr_change_entry) *
hostevs->num_entries;
data = kzalloc(sizeof(struct qeth_addr_change_data) + extrasize,
GFP_ATOMIC);
if (!data) {
QETH_CARD_TEXT(card, 2, "ACNalloc");
return;
}
if (card->info.pnso_mode == QETH_PNSO_BRIDGEPORT)
INIT_DELAYED_WORK(&data->dwork, qeth_addr_change_event_worker);
else
INIT_DELAYED_WORK(&data->dwork, qeth_l2_dev2br_worker);
data->card = card;
memcpy(&data->ac_event, hostevs,
sizeof(struct qeth_ipacmd_addr_change) + extrasize);
queue_delayed_work(card->event_wq, &data->dwork, 0);
}
/* SETBRIDGEPORT support; sending commands */
struct _qeth_sbp_cbctl {
union {
u32 supported;
struct {
enum qeth_sbp_roles *role;
enum qeth_sbp_states *state;
} qports;
} data;
};
static int qeth_bridgeport_makerc(struct qeth_card *card,
struct qeth_ipa_cmd *cmd)
{
struct qeth_ipacmd_setbridgeport *sbp = &cmd->data.sbp;
enum qeth_ipa_sbp_cmd setcmd = sbp->hdr.command_code;
u16 ipa_rc = cmd->hdr.return_code;
u16 sbp_rc = sbp->hdr.return_code;
int rc;
if (ipa_rc == IPA_RC_SUCCESS && sbp_rc == IPA_RC_SUCCESS)
return 0;
if ((IS_IQD(card) && ipa_rc == IPA_RC_SUCCESS) ||
(!IS_IQD(card) && ipa_rc == sbp_rc)) {
switch (sbp_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 (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", ipa_rc);
QETH_CARD_TEXT_(card, 2, "SBPc%04x", sbp_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 data_length)
{
enum qeth_ipa_cmds ipa_cmd = IS_IQD(card) ? IPA_CMD_SETBRIDGEPORT_IQD :
IPA_CMD_SETBRIDGEPORT_OSA;
struct qeth_ipacmd_sbp_hdr *hdr;
struct qeth_cmd_buffer *iob;
iob = qeth_ipa_alloc_cmd(card, ipa_cmd, QETH_PROT_NONE,
data_length +
offsetof(struct qeth_ipacmd_setbridgeport,
data));
if (!iob)
return iob;
hdr = &__ipa_cmd(iob)->data.sbp.hdr;
hdr->cmdlength = sizeof(*hdr) + data_length;
hdr->command_code = sbp_cmd;
hdr->used_total = 1;
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;
int rc;
QETH_CARD_TEXT(card, 2, "brqsupcb");
rc = qeth_bridgeport_makerc(card, cmd);
if (rc)
return rc;
cbctl->data.supported =
cmd->data.sbp.data.query_cmds_supp.supported_cmds;
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,
SBP_DATA_SIZEOF(query_cmds_supp));
if (!iob)
return;
if (qeth_send_ipa_cmd(card, iob, qeth_bridgeport_query_support_cb,
&cbctl)) {
card->options.sbp.role = QETH_SBP_ROLE_NONE;
card->options.sbp.supported_funcs = 0;
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_cbctl *cbctl = (struct _qeth_sbp_cbctl *)reply->param;
struct qeth_sbp_port_data *qports;
int rc;
QETH_CARD_TEXT(card, 2, "brqprtcb");
rc = qeth_bridgeport_makerc(card, cmd);
if (rc)
return rc;
qports = &cmd->data.sbp.data.port_data;
if (qports->entry_length != sizeof(struct qeth_sbp_port_entry)) {
QETH_CARD_TEXT_(card, 2, "SBPs%04x", qports->entry_length);
return -EINVAL;
}
/* 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)
{
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;
return qeth_send_ipa_cmd(card, iob, qeth_bridgeport_query_ports_cb,
&cbctl);
}
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;
QETH_CARD_TEXT(card, 2, "brsetrcb");
return qeth_bridgeport_makerc(card, cmd);
}
/**
* 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)
{
struct qeth_cmd_buffer *iob;
enum qeth_ipa_sbp_cmd setcmd;
unsigned int cmdlength = 0;
QETH_CARD_TEXT(card, 2, "brsetrol");
switch (role) {
case QETH_SBP_ROLE_NONE:
setcmd = IPA_SBP_RESET_BRIDGE_PORT_ROLE;
break;
case QETH_SBP_ROLE_PRIMARY:
setcmd = IPA_SBP_SET_PRIMARY_BRIDGE_PORT;
cmdlength = SBP_DATA_SIZEOF(set_primary);
break;
case QETH_SBP_ROLE_SECONDARY:
setcmd = IPA_SBP_SET_SECONDARY_BRIDGE_PORT;
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;
return qeth_send_ipa_cmd(card, iob, qeth_bridgeport_set_cb, NULL);
}
static void qeth_bridgeport_an_set_cb(void *priv,
struct chsc_pnso_naid_l2 *entry)
{
struct qeth_card *card = (struct qeth_card *)priv;
u8 code;
code = IPA_ADDR_CHANGE_CODE_MACADDR;
if (entry->addr_lnid.lnid < VLAN_N_VID)
code |= IPA_ADDR_CHANGE_CODE_VLANID;
qeth_bridge_emit_host_event(card, anev_reg_unreg, code,
(struct net_if_token *)&entry->nit,
(struct mac_addr_lnid *)&entry->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;
if (!card->options.sbp.supported_funcs)
return -EOPNOTSUPP;
if (enable) {
qeth_bridge_emit_host_event(card, anev_reset, 0, NULL, NULL);
qeth_l2_set_pnso_mode(card, QETH_PNSO_BRIDGEPORT);
rc = qeth_l2_pnso(card, PNSO_OC_NET_BRIDGE_INFO, 1,
qeth_bridgeport_an_set_cb, card);
if (rc)
qeth_l2_set_pnso_mode(card, QETH_PNSO_NONE);
} else {
rc = qeth_l2_pnso(card, PNSO_OC_NET_BRIDGE_INFO, 0, NULL, NULL);
qeth_l2_set_pnso_mode(card, QETH_PNSO_NONE);
}
return rc;
}
/* VNIC Characteristics support */
/* handle VNICC IPA command return codes; convert to error codes */
static int qeth_l2_vnicc_makerc(struct qeth_card *card, u16 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 */
static int qeth_l2_vnicc_request_cb(struct qeth_card *card,
struct qeth_reply *reply,
unsigned long data)
{
struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
struct qeth_ipacmd_vnicc *rep = &cmd->data.vnicc;
u32 sub_cmd = cmd->data.vnicc.hdr.sub_command;
QETH_CARD_TEXT(card, 2, "vniccrcb");
if (cmd->hdr.return_code)
return qeth_l2_vnicc_makerc(card, cmd->hdr.return_code);
/* return results to caller */
card->options.vnicc.sup_chars = rep->vnicc_cmds.supported;
card->options.vnicc.cur_chars = rep->vnicc_cmds.enabled;
if (sub_cmd == IPA_VNICC_QUERY_CMDS)
*(u32 *)reply->param = rep->data.query_cmds.sup_cmds;
else if (sub_cmd == IPA_VNICC_GET_TIMEOUT)
*(u32 *)reply->param = rep->data.getset_timeout.timeout;
return 0;
}
static struct qeth_cmd_buffer *qeth_l2_vnicc_build_cmd(struct qeth_card *card,
u32 vnicc_cmd,
unsigned int data_length)
{
struct qeth_ipacmd_vnicc_hdr *hdr;
struct qeth_cmd_buffer *iob;
iob = qeth_ipa_alloc_cmd(card, IPA_CMD_VNICC, QETH_PROT_NONE,
data_length +
offsetof(struct qeth_ipacmd_vnicc, data));
if (!iob)
return NULL;
hdr = &__ipa_cmd(iob)->data.vnicc.hdr;
hdr->data_length = sizeof(*hdr) + data_length;
hdr->sub_command = vnicc_cmd;
return iob;
}
/* VNICC query VNIC characteristics request */
static int qeth_l2_vnicc_query_chars(struct qeth_card *card)
{
struct qeth_cmd_buffer *iob;
QETH_CARD_TEXT(card, 2, "vniccqch");
iob = qeth_l2_vnicc_build_cmd(card, IPA_VNICC_QUERY_CHARS, 0);
if (!iob)
return -ENOMEM;
return qeth_send_ipa_cmd(card, iob, qeth_l2_vnicc_request_cb, NULL);
}
/* VNICC query sub commands request */
static int qeth_l2_vnicc_query_cmds(struct qeth_card *card, u32 vnic_char,
u32 *sup_cmds)
{
struct qeth_cmd_buffer *iob;
QETH_CARD_TEXT(card, 2, "vniccqcm");
iob = qeth_l2_vnicc_build_cmd(card, IPA_VNICC_QUERY_CMDS,
VNICC_DATA_SIZEOF(query_cmds));
if (!iob)
return -ENOMEM;
__ipa_cmd(iob)->data.vnicc.data.query_cmds.vnic_char = vnic_char;
return qeth_send_ipa_cmd(card, iob, qeth_l2_vnicc_request_cb, sup_cmds);
}
/* VNICC enable/disable characteristic request */
static int qeth_l2_vnicc_set_char(struct qeth_card *card, u32 vnic_char,
u32 cmd)
{
struct qeth_cmd_buffer *iob;
QETH_CARD_TEXT(card, 2, "vniccedc");
iob = qeth_l2_vnicc_build_cmd(card, cmd, VNICC_DATA_SIZEOF(set_char));
if (!iob)
return -ENOMEM;
__ipa_cmd(iob)->data.vnicc.data.set_char.vnic_char = vnic_char;
return qeth_send_ipa_cmd(card, iob, qeth_l2_vnicc_request_cb, NULL);
}
/* 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_vnicc_getset_timeout *getset_timeout;
struct qeth_cmd_buffer *iob;
QETH_CARD_TEXT(card, 2, "vniccgst");
iob = qeth_l2_vnicc_build_cmd(card, cmd,
VNICC_DATA_SIZEOF(getset_timeout));
if (!iob)
return -ENOMEM;
getset_timeout = &__ipa_cmd(iob)->data.vnicc.data.getset_timeout;
getset_timeout->vnic_char = vnicc;
if (cmd == IPA_VNICC_SET_TIMEOUT)
getset_timeout->timeout = *timeout;
return qeth_send_ipa_cmd(card, iob, qeth_l2_vnicc_request_cb, timeout);
}
/* 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;
}
/* set current VNICC flag state; called from sysfs store function */
int qeth_l2_vnicc_set_state(struct qeth_card *card, u32 vnicc, bool state)
{
int rc = 0;
u32 cmd;
QETH_CARD_TEXT(card, 2, "vniccsch");
/* check if characteristic and enable/disable are supported */
if (!(card->options.vnicc.sup_chars & vnicc) ||
!(card->options.vnicc.set_char_sup & vnicc))
return -EOPNOTSUPP;
if (qeth_bridgeport_is_in_use(card))
return -EBUSY;
/* set enable/disable command and store wanted characteristic */
if (state) {
cmd = IPA_VNICC_ENABLE;
card->options.vnicc.wanted_chars |= vnicc;
} else {
cmd = IPA_VNICC_DISABLE;
card->options.vnicc.wanted_chars &= ~vnicc;
}
/* do we need to do anything? */
if (card->options.vnicc.cur_chars == card->options.vnicc.wanted_chars)
return rc;
/* if card is not ready, simply stop here */
if (!qeth_card_hw_is_reachable(card)) {
if (state)
card->options.vnicc.cur_chars |= vnicc;
else
card->options.vnicc.cur_chars &= ~vnicc;
return rc;
}
rc = qeth_l2_vnicc_set_char(card, vnicc, cmd);
if (rc)
card->options.vnicc.wanted_chars =
card->options.vnicc.cur_chars;
else {
/* successful online VNICC change; handle special cases */
if (state && vnicc == QETH_VNICC_RX_BCAST)
card->options.vnicc.rx_bcast_enabled = true;
if (!state && vnicc == QETH_VNICC_LEARNING)
qeth_l2_vnicc_recover_timeout(card, vnicc,
&card->options.vnicc.learning_timeout);
}
return rc;
}
/* get current VNICC flag state; called from sysfs show function */
int qeth_l2_vnicc_get_state(struct qeth_card *card, u32 vnicc, bool *state)
{
int rc = 0;
QETH_CARD_TEXT(card, 2, "vniccgch");
/* check if characteristic is supported */
if (!(card->options.vnicc.sup_chars & vnicc))
return -EOPNOTSUPP;
if (qeth_bridgeport_is_in_use(card))
return -EBUSY;
/* if card is ready, query current VNICC state */
if (qeth_card_hw_is_reachable(card))
rc = qeth_l2_vnicc_query_chars(card);
*state = (card->options.vnicc.cur_chars & vnicc) ? true : false;
return rc;
}
/* set VNICC timeout; called from sysfs store function. Currently, only learning
* supports timeout
*/
int qeth_l2_vnicc_set_timeout(struct qeth_card *card, u32 timeout)
{
int rc = 0;
QETH_CARD_TEXT(card, 2, "vniccsto");
/* check if characteristic and set_timeout are supported */
if (!(card->options.vnicc.sup_chars & QETH_VNICC_LEARNING) ||
!(card->options.vnicc.getset_timeout_sup & QETH_VNICC_LEARNING))
return -EOPNOTSUPP;
if (qeth_bridgeport_is_in_use(card))
return -EBUSY;
/* do we need to do anything? */
if (card->options.vnicc.learning_timeout == timeout)
return rc;
/* if card is not ready, simply store the value internally and return */
if (!qeth_card_hw_is_reachable(card)) {
card->options.vnicc.learning_timeout = timeout;
return rc;
}
/* send timeout value to card; if successful, store value internally */
rc = qeth_l2_vnicc_getset_timeout(card, QETH_VNICC_LEARNING,
IPA_VNICC_SET_TIMEOUT, &timeout);
if (!rc)
card->options.vnicc.learning_timeout = timeout;
return rc;
}
/* get current VNICC timeout; called from sysfs show function. Currently, only
* learning supports timeout
*/
int qeth_l2_vnicc_get_timeout(struct qeth_card *card, u32 *timeout)
{
int rc = 0;
QETH_CARD_TEXT(card, 2, "vniccgto");
/* check if characteristic and get_timeout are supported */
if (!(card->options.vnicc.sup_chars & QETH_VNICC_LEARNING) ||
!(card->options.vnicc.getset_timeout_sup & QETH_VNICC_LEARNING))
return -EOPNOTSUPP;
if (qeth_bridgeport_is_in_use(card))
return -EBUSY;
/* if card is ready, get timeout. Otherwise, just return stored value */
*timeout = card->options.vnicc.learning_timeout;
if (qeth_card_hw_is_reachable(card))
rc = qeth_l2_vnicc_getset_timeout(card, QETH_VNICC_LEARNING,
IPA_VNICC_GET_TIMEOUT,
timeout);
return rc;
}
/* check if VNICC is currently enabled */
static bool _qeth_l2_vnicc_is_in_use(struct qeth_card *card)
{
if (!card->options.vnicc.sup_chars)
return false;
/* default values are only OK if rx_bcast was not enabled by user
* or the card is offline.
*/
if (card->options.vnicc.cur_chars == QETH_VNICC_DEFAULT) {
if (!card->options.vnicc.rx_bcast_enabled ||
!qeth_card_hw_is_reachable(card))
return false;
}
return true;
}
/**
* qeth_bridgeport_allowed - are any qeth_bridgeport functions allowed?
* @card: qeth_card structure pointer
*
* qeth_bridgeport functionality is mutually exclusive with usage of the
* VNIC Characteristics and dev2br address notifications
*/
bool qeth_bridgeport_allowed(struct qeth_card *card)
{
struct qeth_priv *priv = netdev_priv(card->dev);
return (!_qeth_l2_vnicc_is_in_use(card) &&
!(priv->brport_features & BR_LEARNING_SYNC));
}
/* recover user characteristic setting */
static bool qeth_l2_vnicc_recover_char(struct qeth_card *card, u32 vnicc,
bool enable)
{
u32 cmd = enable ? IPA_VNICC_ENABLE : IPA_VNICC_DISABLE;
if (card->options.vnicc.sup_chars & vnicc &&
card->options.vnicc.set_char_sup & vnicc &&
!qeth_l2_vnicc_set_char(card, vnicc, cmd))
return false;
card->options.vnicc.wanted_chars &= ~vnicc;
card->options.vnicc.wanted_chars |= QETH_VNICC_DEFAULT & vnicc;
return true;
}
/* (re-)initialize VNICC */
static void qeth_l2_vnicc_init(struct qeth_card *card)
{
u32 *timeout = &card->options.vnicc.learning_timeout;
bool enable, error = false;
unsigned int chars_len, i;
unsigned long chars_tmp;
u32 sup_cmds, vnicc;
QETH_CARD_TEXT(card, 2, "vniccini");
/* reset rx_bcast */
card->options.vnicc.rx_bcast_enabled = 0;
/* initial query and storage of VNIC characteristics */
if (qeth_l2_vnicc_query_chars(card)) {
if (card->options.vnicc.wanted_chars != QETH_VNICC_DEFAULT ||
*timeout != QETH_VNICC_DEFAULT_TIMEOUT)
dev_err(&card->gdev->dev, "Configuring the VNIC characteristics failed\n");
/* fail quietly if user didn't change the default config */
card->options.vnicc.sup_chars = 0;
card->options.vnicc.cur_chars = 0;
card->options.vnicc.wanted_chars = QETH_VNICC_DEFAULT;
return;
}
/* get supported commands for each supported characteristic */
chars_tmp = card->options.vnicc.sup_chars;
chars_len = sizeof(card->options.vnicc.sup_chars) * BITS_PER_BYTE;
for_each_set_bit(i, &chars_tmp, chars_len) {
vnicc = BIT(i);
if (qeth_l2_vnicc_query_cmds(card, vnicc, &sup_cmds)) {
sup_cmds = 0;
error = true;
}
if ((sup_cmds & IPA_VNICC_SET_TIMEOUT) &&
(sup_cmds & IPA_VNICC_GET_TIMEOUT))
card->options.vnicc.getset_timeout_sup |= vnicc;
else
card->options.vnicc.getset_timeout_sup &= ~vnicc;
if ((sup_cmds & IPA_VNICC_ENABLE) &&
(sup_cmds & IPA_VNICC_DISABLE))
card->options.vnicc.set_char_sup |= vnicc;
else
card->options.vnicc.set_char_sup &= ~vnicc;
}
/* enforce assumed default values and recover settings, if changed */
error |= qeth_l2_vnicc_recover_timeout(card, QETH_VNICC_LEARNING,
timeout);
/* Change chars, if necessary */
chars_tmp = card->options.vnicc.wanted_chars ^
card->options.vnicc.cur_chars;
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;
}
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;
qeth_l2_vnicc_set_defaults(card);
mutex_init(&card->sbp_lock);
if (gdev->dev.type) {
rc = device_add_groups(&gdev->dev, qeth_l2_attr_groups);
if (rc)
return rc;
} else {
gdev->dev.type = &qeth_l2_devtype;
}
INIT_WORK(&card->rx_mode_work, qeth_l2_rx_mode_work);
return 0;
}
static void qeth_l2_remove_device(struct ccwgroup_device *gdev)
{
struct qeth_card *card = dev_get_drvdata(&gdev->dev);
struct qeth_priv *priv;
if (gdev->dev.type != &qeth_l2_devtype)
device_remove_groups(&gdev->dev, qeth_l2_attr_groups);
qeth_set_allowed_threads(card, 0, 1);
wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
if (gdev->state == CCWGROUP_ONLINE)
qeth_set_offline(card, card->discipline, false);
if (card->dev->reg_state == NETREG_REGISTERED) {
priv = netdev_priv(card->dev);
if (priv->brport_features & BR_LEARNING_SYNC) {
rtnl_lock();
qeth_l2_br2dev_put();
rtnl_unlock();
}
unregister_netdev(card->dev);
}
}
static int qeth_l2_set_online(struct qeth_card *card, bool carrier_ok)
{
struct net_device *dev = card->dev;
int rc = 0;
qeth_l2_detect_dev2br_support(card);
mutex_lock(&card->sbp_lock);
qeth_bridgeport_query_support(card);
if (card->options.sbp.supported_funcs) {
qeth_l2_setup_bridgeport_attrs(card);
dev_info(&card->gdev->dev,
"The device represents a Bridge Capable Port\n");
}
mutex_unlock(&card->sbp_lock);
qeth_l2_register_dev_addr(card);
/* for the rx_bcast characteristic, init VNICC after setmac */
qeth_l2_vnicc_init(card);
qeth_l2_trace_features(card);
/* softsetup */
QETH_CARD_TEXT(card, 2, "softsetp");
card->state = CARD_STATE_SOFTSETUP;
qeth_set_allowed_threads(card, 0xffffffff, 0);
if (dev->reg_state != NETREG_REGISTERED) {
rc = qeth_l2_setup_netdev(card);
if (rc)
goto err_setup;
if (carrier_ok)
netif_carrier_on(dev);
} else {
rtnl_lock();
rc = qeth_set_real_num_tx_queues(card,
qeth_tx_actual_queues(card));
if (rc) {
rtnl_unlock();
goto err_set_queues;
}
if (carrier_ok)
netif_carrier_on(dev);
else
netif_carrier_off(dev);
netif_device_attach(dev);
qeth_enable_hw_features(dev);
qeth_l2_enable_brport_features(card);
if (netif_running(dev)) {
local_bh_disable();
napi_schedule(&card->napi);
/* kick-start the NAPI softirq: */
local_bh_enable();
qeth_l2_set_rx_mode(dev);
}
rtnl_unlock();
}
return 0;
err_set_queues:
err_setup:
qeth_set_allowed_threads(card, 0, 1);
card->state = CARD_STATE_DOWN;
return rc;
}
static void qeth_l2_set_offline(struct qeth_card *card)
{
struct qeth_priv *priv = netdev_priv(card->dev);
qeth_set_allowed_threads(card, 0, 1);
qeth_l2_drain_rx_mode_cache(card);
if (card->state == CARD_STATE_SOFTSETUP)
card->state = CARD_STATE_DOWN;
qeth_l2_set_pnso_mode(card, QETH_PNSO_NONE);
if (priv->brport_features & BR_LEARNING_SYNC)
qeth_l2_dev2br_fdb_flush(card);
}
/* 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;
}
return 1;
case IPA_CMD_ADDRESS_CHANGE_NOTIF:
qeth_addr_change_event(card, cmd);
return 0;
default:
return 1;
}
}
const struct qeth_discipline qeth_l2_discipline = {
.setup = qeth_l2_probe_device,
.remove = qeth_l2_remove_device,
.set_online = qeth_l2_set_online,
.set_offline = qeth_l2_set_offline,
.do_ioctl = NULL,
.control_event_handler = qeth_l2_control_event,
};
EXPORT_SYMBOL_GPL(qeth_l2_discipline);
static int __init qeth_l2_init(void)
{
pr_info("register layer 2 discipline\n");
refcount_set(&qeth_l2_switchdev_notify_refcnt, 0);
return 0;
}
static void __exit qeth_l2_exit(void)
{
pr_info("unregister layer 2 discipline\n");
}
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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