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linux_dsm_epyc7002/drivers/s390/net/qeth_l3_main.c
Julian Wiedmann 8b5026bc16 s390/qeth: fix qdio teardown after early init error 
qeth_l?_set_online() goes through a number of initialization steps, and
on any error uses qeth_l?_stop_card() to tear down the residual state.

The first initialization step is qeth_core_hardsetup_card(). When this
fails after having established a QDIO context on the device
(ie. somewhere after qeth_mpc_initialize()), qeth_l?_stop_card() doesn't
shut down this QDIO context again (since the card state hasn't
progressed from DOWN at this stage).

Even worse, we then call qdio_free() as final teardown step to free the
QDIO data structures - while some of them are still hooked into wider
QDIO infrastructure such as the IRQ list. This is inevitably followed by
use-after-frees and other nastyness.

Fix this by unconditionally calling qeth_qdio_clear_card() to shut down
the QDIO context, and also to halt/clear any pending activity on the
various IO channels.
Remove the naive attempt at handling the teardown in
qeth_mpc_initialize(), it clearly doesn't suffice and we're handling it
properly now in the wider teardown code.

Fixes: 4a71df5004 ("qeth: new qeth device driver")
Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-12-24 22:41:06 -08:00

2532 lines
64 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/bitops.h>
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/etherdevice.h>
#include <linux/ip.h>
#include <linux/in.h>
#include <linux/ipv6.h>
#include <linux/inetdevice.h>
#include <linux/igmp.h>
#include <linux/slab.h>
#include <linux/if_ether.h>
#include <linux/if_vlan.h>
#include <linux/skbuff.h>
#include <net/ip.h>
#include <net/arp.h>
#include <net/route.h>
#include <net/ipv6.h>
#include <net/ip6_route.h>
#include <net/iucv/af_iucv.h>
#include <linux/hashtable.h>
#include "qeth_l3.h"
static int qeth_l3_set_offline(struct ccwgroup_device *);
static int qeth_l3_register_addr_entry(struct qeth_card *,
struct qeth_ipaddr *);
static int qeth_l3_deregister_addr_entry(struct qeth_card *,
struct qeth_ipaddr *);
static void qeth_l3_ipaddr4_to_string(const __u8 *addr, char *buf)
{
sprintf(buf, "%pI4", addr);
}
static void qeth_l3_ipaddr6_to_string(const __u8 *addr, char *buf)
{
sprintf(buf, "%pI6", addr);
}
void qeth_l3_ipaddr_to_string(enum qeth_prot_versions proto, const __u8 *addr,
char *buf)
{
if (proto == QETH_PROT_IPV4)
qeth_l3_ipaddr4_to_string(addr, buf);
else if (proto == QETH_PROT_IPV6)
qeth_l3_ipaddr6_to_string(addr, buf);
}
static struct qeth_ipaddr *qeth_l3_find_addr_by_ip(struct qeth_card *card,
struct qeth_ipaddr *query)
{
u32 key = qeth_l3_ipaddr_hash(query);
struct qeth_ipaddr *addr;
if (query->is_multicast) {
hash_for_each_possible(card->ip_mc_htable, addr, hnode, key)
if (qeth_l3_addr_match_ip(addr, query))
return addr;
} else {
hash_for_each_possible(card->ip_htable, addr, hnode, key)
if (qeth_l3_addr_match_ip(addr, query))
return addr;
}
return NULL;
}
static void qeth_l3_convert_addr_to_bits(u8 *addr, u8 *bits, int len)
{
int i, j;
u8 octet;
for (i = 0; i < len; ++i) {
octet = addr[i];
for (j = 7; j >= 0; --j) {
bits[i*8 + j] = octet & 1;
octet >>= 1;
}
}
}
static bool qeth_l3_is_addr_covered_by_ipato(struct qeth_card *card,
struct qeth_ipaddr *addr)
{
struct qeth_ipato_entry *ipatoe;
u8 addr_bits[128] = {0, };
u8 ipatoe_bits[128] = {0, };
int rc = 0;
if (!card->ipato.enabled)
return false;
if (addr->type != QETH_IP_TYPE_NORMAL)
return false;
qeth_l3_convert_addr_to_bits((u8 *) &addr->u, addr_bits,
(addr->proto == QETH_PROT_IPV4)? 4:16);
list_for_each_entry(ipatoe, &card->ipato.entries, entry) {
if (addr->proto != ipatoe->proto)
continue;
qeth_l3_convert_addr_to_bits(ipatoe->addr, ipatoe_bits,
(ipatoe->proto == QETH_PROT_IPV4) ?
4 : 16);
if (addr->proto == QETH_PROT_IPV4)
rc = !memcmp(addr_bits, ipatoe_bits,
min(32, ipatoe->mask_bits));
else
rc = !memcmp(addr_bits, ipatoe_bits,
min(128, ipatoe->mask_bits));
if (rc)
break;
}
/* invert? */
if ((addr->proto == QETH_PROT_IPV4) && card->ipato.invert4)
rc = !rc;
else if ((addr->proto == QETH_PROT_IPV6) && card->ipato.invert6)
rc = !rc;
return rc;
}
static int qeth_l3_delete_ip(struct qeth_card *card,
struct qeth_ipaddr *tmp_addr)
{
int rc = 0;
struct qeth_ipaddr *addr;
if (tmp_addr->type == QETH_IP_TYPE_RXIP)
QETH_CARD_TEXT(card, 2, "delrxip");
else if (tmp_addr->type == QETH_IP_TYPE_VIPA)
QETH_CARD_TEXT(card, 2, "delvipa");
else
QETH_CARD_TEXT(card, 2, "delip");
if (tmp_addr->proto == QETH_PROT_IPV4)
QETH_CARD_HEX(card, 4, &tmp_addr->u.a4.addr, 4);
else {
QETH_CARD_HEX(card, 4, &tmp_addr->u.a6.addr, 8);
QETH_CARD_HEX(card, 4, ((char *)&tmp_addr->u.a6.addr) + 8, 8);
}
addr = qeth_l3_find_addr_by_ip(card, tmp_addr);
if (!addr || !qeth_l3_addr_match_all(addr, tmp_addr))
return -ENOENT;
addr->ref_counter--;
if (addr->type == QETH_IP_TYPE_NORMAL && addr->ref_counter > 0)
return rc;
if (addr->in_progress)
return -EINPROGRESS;
if (qeth_card_hw_is_reachable(card))
rc = qeth_l3_deregister_addr_entry(card, addr);
hash_del(&addr->hnode);
kfree(addr);
return rc;
}
static int qeth_l3_add_ip(struct qeth_card *card, struct qeth_ipaddr *tmp_addr)
{
int rc = 0;
struct qeth_ipaddr *addr;
char buf[40];
if (tmp_addr->type == QETH_IP_TYPE_RXIP)
QETH_CARD_TEXT(card, 2, "addrxip");
else if (tmp_addr->type == QETH_IP_TYPE_VIPA)
QETH_CARD_TEXT(card, 2, "addvipa");
else
QETH_CARD_TEXT(card, 2, "addip");
if (tmp_addr->proto == QETH_PROT_IPV4)
QETH_CARD_HEX(card, 4, &tmp_addr->u.a4.addr, 4);
else {
QETH_CARD_HEX(card, 4, &tmp_addr->u.a6.addr, 8);
QETH_CARD_HEX(card, 4, ((char *)&tmp_addr->u.a6.addr) + 8, 8);
}
addr = qeth_l3_find_addr_by_ip(card, tmp_addr);
if (addr) {
if (tmp_addr->type != QETH_IP_TYPE_NORMAL)
return -EADDRINUSE;
if (qeth_l3_addr_match_all(addr, tmp_addr)) {
addr->ref_counter++;
return 0;
}
qeth_l3_ipaddr_to_string(tmp_addr->proto, (u8 *)&tmp_addr->u,
buf);
dev_warn(&card->gdev->dev,
"Registering IP address %s failed\n", buf);
return -EADDRINUSE;
} else {
addr = kmemdup(tmp_addr, sizeof(*tmp_addr), GFP_KERNEL);
if (!addr)
return -ENOMEM;
if (qeth_l3_is_addr_covered_by_ipato(card, addr)) {
QETH_CARD_TEXT(card, 2, "tkovaddr");
addr->ipato = 1;
}
hash_add(card->ip_htable, &addr->hnode,
qeth_l3_ipaddr_hash(addr));
if (!qeth_card_hw_is_reachable(card)) {
addr->disp_flag = QETH_DISP_ADDR_ADD;
return 0;
}
/* qeth_l3_register_addr_entry can go to sleep
* if we add a IPV4 addr. It is caused by the reason
* that SETIP ipa cmd starts ARP staff for IPV4 addr.
* Thus we should unlock spinlock, and make a protection
* using in_progress variable to indicate that there is
* an hardware operation with this IPV4 address
*/
if (addr->proto == QETH_PROT_IPV4) {
addr->in_progress = 1;
mutex_unlock(&card->ip_lock);
rc = qeth_l3_register_addr_entry(card, addr);
mutex_lock(&card->ip_lock);
addr->in_progress = 0;
} else
rc = qeth_l3_register_addr_entry(card, addr);
if (!rc || rc == -EADDRINUSE || rc == -ENETDOWN) {
addr->disp_flag = QETH_DISP_ADDR_DO_NOTHING;
if (addr->ref_counter < 1) {
qeth_l3_deregister_addr_entry(card, addr);
hash_del(&addr->hnode);
kfree(addr);
}
} else {
hash_del(&addr->hnode);
kfree(addr);
}
}
return rc;
}
static int qeth_l3_modify_ip(struct qeth_card *card, struct qeth_ipaddr *addr,
bool add)
{
int rc;
mutex_lock(&card->ip_lock);
rc = add ? qeth_l3_add_ip(card, addr) : qeth_l3_delete_ip(card, addr);
mutex_unlock(&card->ip_lock);
return rc;
}
static void qeth_l3_drain_rx_mode_cache(struct qeth_card *card)
{
struct qeth_ipaddr *addr;
struct hlist_node *tmp;
int i;
hash_for_each_safe(card->ip_mc_htable, i, tmp, addr, hnode) {
hash_del(&addr->hnode);
kfree(addr);
}
}
static void qeth_l3_clear_ip_htable(struct qeth_card *card, int recover)
{
struct qeth_ipaddr *addr;
struct hlist_node *tmp;
int i;
QETH_CARD_TEXT(card, 4, "clearip");
mutex_lock(&card->ip_lock);
hash_for_each_safe(card->ip_htable, i, tmp, addr, hnode) {
if (!recover) {
hash_del(&addr->hnode);
kfree(addr);
continue;
}
addr->disp_flag = QETH_DISP_ADDR_ADD;
}
mutex_unlock(&card->ip_lock);
}
static void qeth_l3_recover_ip(struct qeth_card *card)
{
struct qeth_ipaddr *addr;
struct hlist_node *tmp;
int i;
int rc;
QETH_CARD_TEXT(card, 4, "recovrip");
mutex_lock(&card->ip_lock);
hash_for_each_safe(card->ip_htable, i, tmp, addr, hnode) {
if (addr->disp_flag == QETH_DISP_ADDR_ADD) {
if (addr->proto == QETH_PROT_IPV4) {
addr->in_progress = 1;
mutex_unlock(&card->ip_lock);
rc = qeth_l3_register_addr_entry(card, addr);
mutex_lock(&card->ip_lock);
addr->in_progress = 0;
} else
rc = qeth_l3_register_addr_entry(card, addr);
if (!rc) {
addr->disp_flag = QETH_DISP_ADDR_DO_NOTHING;
if (addr->ref_counter < 1)
qeth_l3_delete_ip(card, addr);
} else {
hash_del(&addr->hnode);
kfree(addr);
}
}
}
mutex_unlock(&card->ip_lock);
}
static int qeth_l3_setdelip_cb(struct qeth_card *card, struct qeth_reply *reply,
unsigned long data)
{
struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
switch (cmd->hdr.return_code) {
case IPA_RC_SUCCESS:
return 0;
case IPA_RC_DUPLICATE_IP_ADDRESS:
return -EADDRINUSE;
case IPA_RC_MC_ADDR_NOT_FOUND:
return -ENOENT;
case IPA_RC_LAN_OFFLINE:
return -ENETDOWN;
default:
return -EIO;
}
}
static int qeth_l3_send_setdelmc(struct qeth_card *card,
struct qeth_ipaddr *addr, int ipacmd)
{
struct qeth_cmd_buffer *iob;
struct qeth_ipa_cmd *cmd;
QETH_CARD_TEXT(card, 4, "setdelmc");
iob = qeth_ipa_alloc_cmd(card, ipacmd, addr->proto,
IPA_DATA_SIZEOF(setdelipm));
if (!iob)
return -ENOMEM;
cmd = __ipa_cmd(iob);
if (addr->proto == QETH_PROT_IPV6) {
cmd->data.setdelipm.ip = addr->u.a6.addr;
ipv6_eth_mc_map(&addr->u.a6.addr, cmd->data.setdelipm.mac);
} else {
cmd->data.setdelipm.ip.s6_addr32[3] = addr->u.a4.addr;
ip_eth_mc_map(addr->u.a4.addr, cmd->data.setdelipm.mac);
}
return qeth_send_ipa_cmd(card, iob, qeth_l3_setdelip_cb, NULL);
}
static void qeth_l3_fill_netmask(u8 *netmask, unsigned int len)
{
int i, j;
for (i = 0; i < 16; i++) {
j = (len) - (i * 8);
if (j >= 8)
netmask[i] = 0xff;
else if (j > 0)
netmask[i] = (u8)(0xFF00 >> j);
else
netmask[i] = 0;
}
}
static u32 qeth_l3_get_setdelip_flags(struct qeth_ipaddr *addr, bool set)
{
switch (addr->type) {
case QETH_IP_TYPE_RXIP:
return (set) ? QETH_IPA_SETIP_TAKEOVER_FLAG : 0;
case QETH_IP_TYPE_VIPA:
return (set) ? QETH_IPA_SETIP_VIPA_FLAG :
QETH_IPA_DELIP_VIPA_FLAG;
default:
return (set && addr->ipato) ? QETH_IPA_SETIP_TAKEOVER_FLAG : 0;
}
}
static int qeth_l3_send_setdelip(struct qeth_card *card,
struct qeth_ipaddr *addr,
enum qeth_ipa_cmds ipacmd)
{
struct qeth_cmd_buffer *iob;
struct qeth_ipa_cmd *cmd;
__u8 netmask[16];
u32 flags;
QETH_CARD_TEXT(card, 4, "setdelip");
iob = qeth_ipa_alloc_cmd(card, ipacmd, addr->proto,
IPA_DATA_SIZEOF(setdelip6));
if (!iob)
return -ENOMEM;
cmd = __ipa_cmd(iob);
flags = qeth_l3_get_setdelip_flags(addr, ipacmd == IPA_CMD_SETIP);
QETH_CARD_TEXT_(card, 4, "flags%02X", flags);
if (addr->proto == QETH_PROT_IPV6) {
memcpy(cmd->data.setdelip6.ip_addr, &addr->u.a6.addr,
sizeof(struct in6_addr));
qeth_l3_fill_netmask(netmask, addr->u.a6.pfxlen);
memcpy(cmd->data.setdelip6.mask, netmask,
sizeof(struct in6_addr));
cmd->data.setdelip6.flags = flags;
} else {
memcpy(cmd->data.setdelip4.ip_addr, &addr->u.a4.addr, 4);
memcpy(cmd->data.setdelip4.mask, &addr->u.a4.mask, 4);
cmd->data.setdelip4.flags = flags;
}
return qeth_send_ipa_cmd(card, iob, qeth_l3_setdelip_cb, NULL);
}
static int qeth_l3_send_setrouting(struct qeth_card *card,
enum qeth_routing_types type, enum qeth_prot_versions prot)
{
int rc;
struct qeth_ipa_cmd *cmd;
struct qeth_cmd_buffer *iob;
QETH_CARD_TEXT(card, 4, "setroutg");
iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SETRTG, prot,
IPA_DATA_SIZEOF(setrtg));
if (!iob)
return -ENOMEM;
cmd = __ipa_cmd(iob);
cmd->data.setrtg.type = (type);
rc = qeth_send_ipa_cmd(card, iob, NULL, NULL);
return rc;
}
static int qeth_l3_correct_routing_type(struct qeth_card *card,
enum qeth_routing_types *type, enum qeth_prot_versions prot)
{
if (IS_IQD(card)) {
switch (*type) {
case NO_ROUTER:
case PRIMARY_CONNECTOR:
case SECONDARY_CONNECTOR:
case MULTICAST_ROUTER:
return 0;
default:
goto out_inval;
}
} else {
switch (*type) {
case NO_ROUTER:
case PRIMARY_ROUTER:
case SECONDARY_ROUTER:
return 0;
case MULTICAST_ROUTER:
if (qeth_is_ipafunc_supported(card, prot,
IPA_OSA_MC_ROUTER))
return 0;
default:
goto out_inval;
}
}
out_inval:
*type = NO_ROUTER;
return -EINVAL;
}
int qeth_l3_setrouting_v4(struct qeth_card *card)
{
int rc;
QETH_CARD_TEXT(card, 3, "setrtg4");
rc = qeth_l3_correct_routing_type(card, &card->options.route4.type,
QETH_PROT_IPV4);
if (rc)
return rc;
rc = qeth_l3_send_setrouting(card, card->options.route4.type,
QETH_PROT_IPV4);
if (rc) {
card->options.route4.type = NO_ROUTER;
QETH_DBF_MESSAGE(2, "Error (%#06x) while setting routing type on device %x. Type set to 'no router'.\n",
rc, CARD_DEVID(card));
}
return rc;
}
int qeth_l3_setrouting_v6(struct qeth_card *card)
{
int rc = 0;
QETH_CARD_TEXT(card, 3, "setrtg6");
if (!qeth_is_supported(card, IPA_IPV6))
return 0;
rc = qeth_l3_correct_routing_type(card, &card->options.route6.type,
QETH_PROT_IPV6);
if (rc)
return rc;
rc = qeth_l3_send_setrouting(card, card->options.route6.type,
QETH_PROT_IPV6);
if (rc) {
card->options.route6.type = NO_ROUTER;
QETH_DBF_MESSAGE(2, "Error (%#06x) while setting routing type on device %x. Type set to 'no router'.\n",
rc, CARD_DEVID(card));
}
return rc;
}
/*
* IP address takeover related functions
*/
/**
* qeth_l3_update_ipato() - Update 'takeover' property, for all NORMAL IPs.
*
* Caller must hold ip_lock.
*/
void qeth_l3_update_ipato(struct qeth_card *card)
{
struct qeth_ipaddr *addr;
unsigned int i;
hash_for_each(card->ip_htable, i, addr, hnode) {
if (addr->type != QETH_IP_TYPE_NORMAL)
continue;
addr->ipato = qeth_l3_is_addr_covered_by_ipato(card, addr);
}
}
static void qeth_l3_clear_ipato_list(struct qeth_card *card)
{
struct qeth_ipato_entry *ipatoe, *tmp;
mutex_lock(&card->ip_lock);
list_for_each_entry_safe(ipatoe, tmp, &card->ipato.entries, entry) {
list_del(&ipatoe->entry);
kfree(ipatoe);
}
qeth_l3_update_ipato(card);
mutex_unlock(&card->ip_lock);
}
int qeth_l3_add_ipato_entry(struct qeth_card *card,
struct qeth_ipato_entry *new)
{
struct qeth_ipato_entry *ipatoe;
int rc = 0;
QETH_CARD_TEXT(card, 2, "addipato");
mutex_lock(&card->ip_lock);
list_for_each_entry(ipatoe, &card->ipato.entries, entry) {
if (ipatoe->proto != new->proto)
continue;
if (!memcmp(ipatoe->addr, new->addr,
(ipatoe->proto == QETH_PROT_IPV4)? 4:16) &&
(ipatoe->mask_bits == new->mask_bits)) {
rc = -EEXIST;
break;
}
}
if (!rc) {
list_add_tail(&new->entry, &card->ipato.entries);
qeth_l3_update_ipato(card);
}
mutex_unlock(&card->ip_lock);
return rc;
}
int qeth_l3_del_ipato_entry(struct qeth_card *card,
enum qeth_prot_versions proto, u8 *addr,
int mask_bits)
{
struct qeth_ipato_entry *ipatoe, *tmp;
int rc = -ENOENT;
QETH_CARD_TEXT(card, 2, "delipato");
mutex_lock(&card->ip_lock);
list_for_each_entry_safe(ipatoe, tmp, &card->ipato.entries, entry) {
if (ipatoe->proto != proto)
continue;
if (!memcmp(ipatoe->addr, addr,
(proto == QETH_PROT_IPV4)? 4:16) &&
(ipatoe->mask_bits == mask_bits)) {
list_del(&ipatoe->entry);
qeth_l3_update_ipato(card);
kfree(ipatoe);
rc = 0;
}
}
mutex_unlock(&card->ip_lock);
return rc;
}
int qeth_l3_modify_rxip_vipa(struct qeth_card *card, bool add, const u8 *ip,
enum qeth_ip_types type,
enum qeth_prot_versions proto)
{
struct qeth_ipaddr addr;
qeth_l3_init_ipaddr(&addr, type, proto);
if (proto == QETH_PROT_IPV4)
memcpy(&addr.u.a4.addr, ip, 4);
else
memcpy(&addr.u.a6.addr, ip, 16);
return qeth_l3_modify_ip(card, &addr, add);
}
int qeth_l3_modify_hsuid(struct qeth_card *card, bool add)
{
struct qeth_ipaddr addr;
unsigned int i;
qeth_l3_init_ipaddr(&addr, QETH_IP_TYPE_NORMAL, QETH_PROT_IPV6);
addr.u.a6.addr.s6_addr[0] = 0xfe;
addr.u.a6.addr.s6_addr[1] = 0x80;
for (i = 0; i < 8; i++)
addr.u.a6.addr.s6_addr[8+i] = card->options.hsuid[i];
return qeth_l3_modify_ip(card, &addr, add);
}
static int qeth_l3_register_addr_entry(struct qeth_card *card,
struct qeth_ipaddr *addr)
{
char buf[50];
int rc = 0;
int cnt = 3;
if (card->options.sniffer)
return 0;
if (addr->proto == QETH_PROT_IPV4) {
QETH_CARD_TEXT(card, 2, "setaddr4");
QETH_CARD_HEX(card, 3, &addr->u.a4.addr, sizeof(int));
} else if (addr->proto == QETH_PROT_IPV6) {
QETH_CARD_TEXT(card, 2, "setaddr6");
QETH_CARD_HEX(card, 3, &addr->u.a6.addr, 8);
QETH_CARD_HEX(card, 3, ((char *)&addr->u.a6.addr) + 8, 8);
} else {
QETH_CARD_TEXT(card, 2, "setaddr?");
QETH_CARD_HEX(card, 3, addr, sizeof(struct qeth_ipaddr));
}
do {
if (addr->is_multicast)
rc = qeth_l3_send_setdelmc(card, addr, IPA_CMD_SETIPM);
else
rc = qeth_l3_send_setdelip(card, addr, IPA_CMD_SETIP);
if (rc)
QETH_CARD_TEXT(card, 2, "failed");
} while ((--cnt > 0) && rc);
if (rc) {
QETH_CARD_TEXT(card, 2, "FAILED");
qeth_l3_ipaddr_to_string(addr->proto, (u8 *)&addr->u, buf);
dev_warn(&card->gdev->dev,
"Registering IP address %s failed\n", buf);
}
return rc;
}
static int qeth_l3_deregister_addr_entry(struct qeth_card *card,
struct qeth_ipaddr *addr)
{
int rc = 0;
if (card->options.sniffer)
return 0;
if (addr->proto == QETH_PROT_IPV4) {
QETH_CARD_TEXT(card, 2, "deladdr4");
QETH_CARD_HEX(card, 3, &addr->u.a4.addr, sizeof(int));
} else if (addr->proto == QETH_PROT_IPV6) {
QETH_CARD_TEXT(card, 2, "deladdr6");
QETH_CARD_HEX(card, 3, &addr->u.a6.addr, 8);
QETH_CARD_HEX(card, 3, ((char *)&addr->u.a6.addr) + 8, 8);
} else {
QETH_CARD_TEXT(card, 2, "deladdr?");
QETH_CARD_HEX(card, 3, addr, sizeof(struct qeth_ipaddr));
}
if (addr->is_multicast)
rc = qeth_l3_send_setdelmc(card, addr, IPA_CMD_DELIPM);
else
rc = qeth_l3_send_setdelip(card, addr, IPA_CMD_DELIP);
if (rc)
QETH_CARD_TEXT(card, 2, "failed");
return rc;
}
static int qeth_l3_setadapter_parms(struct qeth_card *card)
{
int rc = 0;
QETH_CARD_TEXT(card, 2, "setadprm");
if (qeth_adp_supported(card, IPA_SETADP_ALTER_MAC_ADDRESS)) {
rc = qeth_setadpparms_change_macaddr(card);
if (rc)
dev_warn(&card->gdev->dev, "Reading the adapter MAC"
" address failed\n");
}
return rc;
}
static int qeth_l3_start_ipa_arp_processing(struct qeth_card *card)
{
int rc;
QETH_CARD_TEXT(card, 3, "ipaarp");
if (!qeth_is_supported(card, IPA_ARP_PROCESSING)) {
dev_info(&card->gdev->dev,
"ARP processing not supported on %s!\n",
QETH_CARD_IFNAME(card));
return 0;
}
rc = qeth_send_simple_setassparms(card, IPA_ARP_PROCESSING,
IPA_CMD_ASS_START, NULL);
if (rc) {
dev_warn(&card->gdev->dev,
"Starting ARP processing support for %s failed\n",
QETH_CARD_IFNAME(card));
}
return rc;
}
static int qeth_l3_start_ipa_source_mac(struct qeth_card *card)
{
int rc;
QETH_CARD_TEXT(card, 3, "stsrcmac");
if (!qeth_is_supported(card, IPA_SOURCE_MAC)) {
dev_info(&card->gdev->dev,
"Inbound source MAC-address not supported on %s\n",
QETH_CARD_IFNAME(card));
return -EOPNOTSUPP;
}
rc = qeth_send_simple_setassparms(card, IPA_SOURCE_MAC,
IPA_CMD_ASS_START, NULL);
if (rc)
dev_warn(&card->gdev->dev,
"Starting source MAC-address support for %s failed\n",
QETH_CARD_IFNAME(card));
return rc;
}
static int qeth_l3_start_ipa_vlan(struct qeth_card *card)
{
int rc = 0;
QETH_CARD_TEXT(card, 3, "strtvlan");
if (!qeth_is_supported(card, IPA_FULL_VLAN)) {
dev_info(&card->gdev->dev,
"VLAN not supported on %s\n", QETH_CARD_IFNAME(card));
return -EOPNOTSUPP;
}
rc = qeth_send_simple_setassparms(card, IPA_VLAN_PRIO,
IPA_CMD_ASS_START, NULL);
if (rc) {
dev_warn(&card->gdev->dev,
"Starting VLAN support for %s failed\n",
QETH_CARD_IFNAME(card));
} else {
dev_info(&card->gdev->dev, "VLAN enabled\n");
}
return rc;
}
static int qeth_l3_start_ipa_multicast(struct qeth_card *card)
{
int rc;
QETH_CARD_TEXT(card, 3, "stmcast");
if (!qeth_is_supported(card, IPA_MULTICASTING)) {
dev_info(&card->gdev->dev,
"Multicast not supported on %s\n",
QETH_CARD_IFNAME(card));
return -EOPNOTSUPP;
}
rc = qeth_send_simple_setassparms(card, IPA_MULTICASTING,
IPA_CMD_ASS_START, NULL);
if (rc) {
dev_warn(&card->gdev->dev,
"Starting multicast support for %s failed\n",
QETH_CARD_IFNAME(card));
} else {
dev_info(&card->gdev->dev, "Multicast enabled\n");
card->dev->flags |= IFF_MULTICAST;
}
return rc;
}
static int qeth_l3_softsetup_ipv6(struct qeth_card *card)
{
u32 ipv6_data = 3;
int rc;
QETH_CARD_TEXT(card, 3, "softipv6");
if (IS_IQD(card))
goto out;
rc = qeth_send_simple_setassparms(card, IPA_IPV6, IPA_CMD_ASS_START,
&ipv6_data);
if (rc) {
dev_err(&card->gdev->dev,
"Activating IPv6 support for %s failed\n",
QETH_CARD_IFNAME(card));
return rc;
}
rc = qeth_send_simple_setassparms_v6(card, IPA_IPV6, IPA_CMD_ASS_START,
NULL);
if (rc) {
dev_err(&card->gdev->dev,
"Activating IPv6 support for %s failed\n",
QETH_CARD_IFNAME(card));
return rc;
}
rc = qeth_send_simple_setassparms_v6(card, IPA_PASSTHRU,
IPA_CMD_ASS_START, NULL);
if (rc) {
dev_warn(&card->gdev->dev,
"Enabling the passthrough mode for %s failed\n",
QETH_CARD_IFNAME(card));
return rc;
}
out:
dev_info(&card->gdev->dev, "IPV6 enabled\n");
return 0;
}
static int qeth_l3_start_ipa_ipv6(struct qeth_card *card)
{
QETH_CARD_TEXT(card, 3, "strtipv6");
if (!qeth_is_supported(card, IPA_IPV6)) {
dev_info(&card->gdev->dev,
"IPv6 not supported on %s\n", QETH_CARD_IFNAME(card));
return 0;
}
return qeth_l3_softsetup_ipv6(card);
}
static int qeth_l3_start_ipa_broadcast(struct qeth_card *card)
{
u32 filter_data = 1;
int rc;
QETH_CARD_TEXT(card, 3, "stbrdcst");
card->info.broadcast_capable = 0;
if (!qeth_is_supported(card, IPA_FILTERING)) {
dev_info(&card->gdev->dev,
"Broadcast not supported on %s\n",
QETH_CARD_IFNAME(card));
rc = -EOPNOTSUPP;
goto out;
}
rc = qeth_send_simple_setassparms(card, IPA_FILTERING,
IPA_CMD_ASS_START, NULL);
if (rc) {
dev_warn(&card->gdev->dev, "Enabling broadcast filtering for "
"%s failed\n", QETH_CARD_IFNAME(card));
goto out;
}
rc = qeth_send_simple_setassparms(card, IPA_FILTERING,
IPA_CMD_ASS_CONFIGURE, &filter_data);
if (rc) {
dev_warn(&card->gdev->dev,
"Setting up broadcast filtering for %s failed\n",
QETH_CARD_IFNAME(card));
goto out;
}
card->info.broadcast_capable = QETH_BROADCAST_WITH_ECHO;
dev_info(&card->gdev->dev, "Broadcast enabled\n");
rc = qeth_send_simple_setassparms(card, IPA_FILTERING,
IPA_CMD_ASS_ENABLE, &filter_data);
if (rc) {
dev_warn(&card->gdev->dev, "Setting up broadcast echo "
"filtering for %s failed\n", QETH_CARD_IFNAME(card));
goto out;
}
card->info.broadcast_capable = QETH_BROADCAST_WITHOUT_ECHO;
out:
if (card->info.broadcast_capable)
card->dev->flags |= IFF_BROADCAST;
else
card->dev->flags &= ~IFF_BROADCAST;
return rc;
}
static int qeth_l3_start_ipassists(struct qeth_card *card)
{
QETH_CARD_TEXT(card, 3, "strtipas");
qeth_l3_start_ipa_arp_processing(card); /* go on*/
qeth_l3_start_ipa_source_mac(card); /* go on*/
qeth_l3_start_ipa_vlan(card); /* go on*/
qeth_l3_start_ipa_multicast(card); /* go on*/
qeth_l3_start_ipa_ipv6(card); /* go on*/
qeth_l3_start_ipa_broadcast(card); /* go on*/
return 0;
}
static int qeth_l3_iqd_read_initial_mac_cb(struct qeth_card *card,
struct qeth_reply *reply, unsigned long data)
{
struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
if (cmd->hdr.return_code)
return -EIO;
ether_addr_copy(card->dev->dev_addr,
cmd->data.create_destroy_addr.unique_id);
return 0;
}
static int qeth_l3_iqd_read_initial_mac(struct qeth_card *card)
{
int rc = 0;
struct qeth_cmd_buffer *iob;
struct qeth_ipa_cmd *cmd;
QETH_CARD_TEXT(card, 2, "hsrmac");
iob = qeth_ipa_alloc_cmd(card, IPA_CMD_CREATE_ADDR, QETH_PROT_IPV6,
IPA_DATA_SIZEOF(create_destroy_addr));
if (!iob)
return -ENOMEM;
cmd = __ipa_cmd(iob);
*((__u16 *) &cmd->data.create_destroy_addr.unique_id[6]) =
card->info.unique_id;
rc = qeth_send_ipa_cmd(card, iob, qeth_l3_iqd_read_initial_mac_cb,
NULL);
return rc;
}
static int qeth_l3_get_unique_id_cb(struct qeth_card *card,
struct qeth_reply *reply, unsigned long data)
{
struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
if (cmd->hdr.return_code == 0) {
card->info.unique_id = *((__u16 *)
&cmd->data.create_destroy_addr.unique_id[6]);
return 0;
}
card->info.unique_id = UNIQUE_ID_IF_CREATE_ADDR_FAILED |
UNIQUE_ID_NOT_BY_CARD;
dev_warn(&card->gdev->dev, "The network adapter failed to generate a unique ID\n");
return -EIO;
}
static int qeth_l3_get_unique_id(struct qeth_card *card)
{
int rc = 0;
struct qeth_cmd_buffer *iob;
struct qeth_ipa_cmd *cmd;
QETH_CARD_TEXT(card, 2, "guniqeid");
if (!qeth_is_supported(card, IPA_IPV6)) {
card->info.unique_id = UNIQUE_ID_IF_CREATE_ADDR_FAILED |
UNIQUE_ID_NOT_BY_CARD;
return 0;
}
iob = qeth_ipa_alloc_cmd(card, IPA_CMD_CREATE_ADDR, QETH_PROT_IPV6,
IPA_DATA_SIZEOF(create_destroy_addr));
if (!iob)
return -ENOMEM;
cmd = __ipa_cmd(iob);
*((__u16 *) &cmd->data.create_destroy_addr.unique_id[6]) =
card->info.unique_id;
rc = qeth_send_ipa_cmd(card, iob, qeth_l3_get_unique_id_cb, NULL);
return rc;
}
static int
qeth_diags_trace_cb(struct qeth_card *card, struct qeth_reply *reply,
unsigned long data)
{
struct qeth_ipa_cmd *cmd;
__u16 rc;
QETH_CARD_TEXT(card, 2, "diastrcb");
cmd = (struct qeth_ipa_cmd *)data;
rc = cmd->hdr.return_code;
if (rc)
QETH_CARD_TEXT_(card, 2, "dxter%x", rc);
switch (cmd->data.diagass.action) {
case QETH_DIAGS_CMD_TRACE_QUERY:
break;
case QETH_DIAGS_CMD_TRACE_DISABLE:
switch (rc) {
case 0:
case IPA_RC_INVALID_SUBCMD:
card->info.promisc_mode = SET_PROMISC_MODE_OFF;
dev_info(&card->gdev->dev, "The HiperSockets network "
"traffic analyzer is deactivated\n");
break;
default:
break;
}
break;
case QETH_DIAGS_CMD_TRACE_ENABLE:
switch (rc) {
case 0:
card->info.promisc_mode = SET_PROMISC_MODE_ON;
dev_info(&card->gdev->dev, "The HiperSockets network "
"traffic analyzer is activated\n");
break;
case IPA_RC_HARDWARE_AUTH_ERROR:
dev_warn(&card->gdev->dev, "The device is not "
"authorized to run as a HiperSockets network "
"traffic analyzer\n");
break;
case IPA_RC_TRACE_ALREADY_ACTIVE:
dev_warn(&card->gdev->dev, "A HiperSockets "
"network traffic analyzer is already "
"active in the HiperSockets LAN\n");
break;
default:
break;
}
break;
default:
QETH_DBF_MESSAGE(2, "Unknown sniffer action (%#06x) on device %x\n",
cmd->data.diagass.action, CARD_DEVID(card));
}
return rc ? -EIO : 0;
}
static int
qeth_diags_trace(struct qeth_card *card, enum qeth_diags_trace_cmds diags_cmd)
{
struct qeth_cmd_buffer *iob;
struct qeth_ipa_cmd *cmd;
QETH_CARD_TEXT(card, 2, "diagtrac");
iob = qeth_get_diag_cmd(card, QETH_DIAGS_CMD_TRACE, 0);
if (!iob)
return -ENOMEM;
cmd = __ipa_cmd(iob);
cmd->data.diagass.type = QETH_DIAGS_TYPE_HIPERSOCKET;
cmd->data.diagass.action = diags_cmd;
return qeth_send_ipa_cmd(card, iob, qeth_diags_trace_cb, NULL);
}
static int qeth_l3_add_mcast_rtnl(struct net_device *dev, int vid, void *arg)
{
struct qeth_card *card = arg;
struct inet6_dev *in6_dev;
struct in_device *in4_dev;
struct qeth_ipaddr *ipm;
struct qeth_ipaddr tmp;
struct ip_mc_list *im4;
struct ifmcaddr6 *im6;
QETH_CARD_TEXT(card, 4, "addmc");
if (!dev || !(dev->flags & IFF_UP))
goto out;
in4_dev = __in_dev_get_rtnl(dev);
if (!in4_dev)
goto walk_ipv6;
qeth_l3_init_ipaddr(&tmp, QETH_IP_TYPE_NORMAL, QETH_PROT_IPV4);
tmp.disp_flag = QETH_DISP_ADDR_ADD;
tmp.is_multicast = 1;
for (im4 = rtnl_dereference(in4_dev->mc_list); im4 != NULL;
im4 = rtnl_dereference(im4->next_rcu)) {
tmp.u.a4.addr = im4->multiaddr;
ipm = qeth_l3_find_addr_by_ip(card, &tmp);
if (ipm) {
/* for mcast, by-IP match means full match */
ipm->disp_flag = QETH_DISP_ADDR_DO_NOTHING;
continue;
}
ipm = kmemdup(&tmp, sizeof(tmp), GFP_KERNEL);
if (!ipm)
continue;
hash_add(card->ip_mc_htable, &ipm->hnode,
qeth_l3_ipaddr_hash(ipm));
}
walk_ipv6:
if (!qeth_is_supported(card, IPA_IPV6))
goto out;
in6_dev = __in6_dev_get(dev);
if (!in6_dev)
goto out;
qeth_l3_init_ipaddr(&tmp, QETH_IP_TYPE_NORMAL, QETH_PROT_IPV6);
tmp.disp_flag = QETH_DISP_ADDR_ADD;
tmp.is_multicast = 1;
read_lock_bh(&in6_dev->lock);
for (im6 = in6_dev->mc_list; im6 != NULL; im6 = im6->next) {
tmp.u.a6.addr = im6->mca_addr;
ipm = qeth_l3_find_addr_by_ip(card, &tmp);
if (ipm) {
/* for mcast, by-IP match means full match */
ipm->disp_flag = QETH_DISP_ADDR_DO_NOTHING;
continue;
}
ipm = kmemdup(&tmp, sizeof(tmp), GFP_ATOMIC);
if (!ipm)
continue;
hash_add(card->ip_mc_htable,
&ipm->hnode, qeth_l3_ipaddr_hash(ipm));
}
read_unlock_bh(&in6_dev->lock);
out:
return 0;
}
static int qeth_l3_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);
return 0;
}
static int qeth_l3_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);
return 0;
}
static void qeth_l3_rebuild_skb(struct qeth_card *card, struct sk_buff *skb,
struct qeth_hdr *hdr)
{
struct af_iucv_trans_hdr *iucv = (struct af_iucv_trans_hdr *) skb->data;
struct net_device *dev = skb->dev;
if (IS_IQD(card) && iucv->magic == ETH_P_AF_IUCV) {
dev_hard_header(skb, dev, ETH_P_AF_IUCV, dev->dev_addr,
"FAKELL", skb->len);
return;
}
if (!(hdr->hdr.l3.flags & QETH_HDR_PASSTHRU)) {
u16 prot = (hdr->hdr.l3.flags & QETH_HDR_IPV6) ? ETH_P_IPV6 :
ETH_P_IP;
unsigned char tg_addr[ETH_ALEN];
skb_reset_network_header(skb);
switch (hdr->hdr.l3.flags & QETH_HDR_CAST_MASK) {
case QETH_CAST_MULTICAST:
if (prot == ETH_P_IP)
ip_eth_mc_map(ip_hdr(skb)->daddr, tg_addr);
else
ipv6_eth_mc_map(&ipv6_hdr(skb)->daddr, tg_addr);
QETH_CARD_STAT_INC(card, rx_multicast);
break;
case QETH_CAST_BROADCAST:
ether_addr_copy(tg_addr, card->dev->broadcast);
QETH_CARD_STAT_INC(card, rx_multicast);
break;
default:
if (card->options.sniffer)
skb->pkt_type = PACKET_OTHERHOST;
ether_addr_copy(tg_addr, card->dev->dev_addr);
}
if (hdr->hdr.l3.ext_flags & QETH_HDR_EXT_SRC_MAC_ADDR)
card->dev->header_ops->create(skb, card->dev, prot,
tg_addr, &hdr->hdr.l3.next_hop.rx.src_mac,
skb->len);
else
card->dev->header_ops->create(skb, card->dev, prot,
tg_addr, "FAKELL", skb->len);
}
/* copy VLAN tag from hdr into skb */
if (!card->options.sniffer &&
(hdr->hdr.l3.ext_flags & (QETH_HDR_EXT_VLAN_FRAME |
QETH_HDR_EXT_INCLUDE_VLAN_TAG))) {
u16 tag = (hdr->hdr.l3.ext_flags & QETH_HDR_EXT_VLAN_FRAME) ?
hdr->hdr.l3.vlan_id :
hdr->hdr.l3.next_hop.rx.vlan_id;
__vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), tag);
}
qeth_rx_csum(card, skb, hdr->hdr.l3.ext_flags);
}
static int qeth_l3_process_inbound_buffer(struct qeth_card *card,
int budget, int *done)
{
int work_done = 0;
struct sk_buff *skb;
struct qeth_hdr *hdr;
*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;
}
if (hdr->hdr.l3.id == QETH_HEADER_TYPE_LAYER3)
qeth_l3_rebuild_skb(card, skb, hdr);
skb->protocol = eth_type_trans(skb, skb->dev);
QETH_CARD_STAT_INC(card, rx_packets);
QETH_CARD_STAT_ADD(card, rx_bytes, skb->len);
napi_gro_receive(&card->napi, skb);
work_done++;
budget--;
}
return work_done;
}
static void qeth_l3_stop_card(struct qeth_card *card)
{
QETH_CARD_TEXT(card, 2, "stopcard");
qeth_set_allowed_threads(card, 0, 1);
cancel_work_sync(&card->rx_mode_work);
qeth_l3_drain_rx_mode_cache(card);
if (card->options.sniffer &&
(card->info.promisc_mode == SET_PROMISC_MODE_ON))
qeth_diags_trace(card, QETH_DIAGS_CMD_TRACE_DISABLE);
if (card->state == CARD_STATE_SOFTSETUP) {
qeth_l3_clear_ip_htable(card, 1);
qeth_clear_ipacmd_list(card);
card->state = CARD_STATE_HARDSETUP;
}
if (card->state == CARD_STATE_HARDSETUP) {
qeth_drain_output_queues(card);
qeth_clear_working_pool_list(card);
card->state = CARD_STATE_DOWN;
}
qeth_qdio_clear_card(card, 0);
flush_workqueue(card->event_wq);
card->info.promisc_mode = 0;
}
static void qeth_l3_set_promisc_mode(struct qeth_card *card)
{
bool enable = card->dev->flags & IFF_PROMISC;
if (card->info.promisc_mode == enable)
return;
if (IS_VM_NIC(card)) { /* Guestlan trace */
if (qeth_adp_supported(card, IPA_SETADP_SET_PROMISC_MODE))
qeth_setadp_promisc_mode(card, enable);
} else if (card->options.sniffer && /* HiperSockets trace */
qeth_adp_supported(card, IPA_SETADP_SET_DIAG_ASSIST)) {
if (enable) {
QETH_CARD_TEXT(card, 3, "+promisc");
qeth_diags_trace(card, QETH_DIAGS_CMD_TRACE_ENABLE);
} else {
QETH_CARD_TEXT(card, 3, "-promisc");
qeth_diags_trace(card, QETH_DIAGS_CMD_TRACE_DISABLE);
}
}
}
static void qeth_l3_rx_mode_work(struct work_struct *work)
{
struct qeth_card *card = container_of(work, struct qeth_card,
rx_mode_work);
struct qeth_ipaddr *addr;
struct hlist_node *tmp;
int i, rc;
QETH_CARD_TEXT(card, 3, "setmulti");
if (!card->options.sniffer) {
rtnl_lock();
qeth_l3_add_mcast_rtnl(card->dev, 0, card);
if (qeth_is_supported(card, IPA_FULL_VLAN))
vlan_for_each(card->dev, qeth_l3_add_mcast_rtnl, card);
rtnl_unlock();
hash_for_each_safe(card->ip_mc_htable, i, tmp, addr, hnode) {
switch (addr->disp_flag) {
case QETH_DISP_ADDR_DELETE:
rc = qeth_l3_deregister_addr_entry(card, addr);
if (!rc || rc == -ENOENT) {
hash_del(&addr->hnode);
kfree(addr);
}
break;
case QETH_DISP_ADDR_ADD:
rc = qeth_l3_register_addr_entry(card, addr);
if (rc && rc != -ENETDOWN) {
hash_del(&addr->hnode);
kfree(addr);
break;
}
addr->ref_counter = 1;
/* fall through */
default:
/* for next call to set_rx_mode(): */
addr->disp_flag = QETH_DISP_ADDR_DELETE;
}
}
}
qeth_l3_set_promisc_mode(card);
}
static int qeth_l3_arp_makerc(u16 rc)
{
switch (rc) {
case IPA_RC_SUCCESS:
return 0;
case QETH_IPA_ARP_RC_NOTSUPP:
case QETH_IPA_ARP_RC_Q_NOTSUPP:
return -EOPNOTSUPP;
case QETH_IPA_ARP_RC_OUT_OF_RANGE:
return -EINVAL;
case QETH_IPA_ARP_RC_Q_NO_DATA:
return -ENOENT;
default:
return -EIO;
}
}
static int qeth_l3_arp_cmd_cb(struct qeth_card *card, struct qeth_reply *reply,
unsigned long data)
{
struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
qeth_setassparms_cb(card, reply, data);
return qeth_l3_arp_makerc(cmd->hdr.return_code);
}
static int qeth_l3_arp_set_no_entries(struct qeth_card *card, int no_entries)
{
struct qeth_cmd_buffer *iob;
int rc;
QETH_CARD_TEXT(card, 3, "arpstnoe");
/*
* currently GuestLAN only supports the ARP assist function
* IPA_CMD_ASS_ARP_QUERY_INFO, but not IPA_CMD_ASS_ARP_SET_NO_ENTRIES;
* thus we say EOPNOTSUPP for this ARP function
*/
if (IS_VM_NIC(card))
return -EOPNOTSUPP;
if (!qeth_is_supported(card, IPA_ARP_PROCESSING)) {
return -EOPNOTSUPP;
}
iob = qeth_get_setassparms_cmd(card, IPA_ARP_PROCESSING,
IPA_CMD_ASS_ARP_SET_NO_ENTRIES,
SETASS_DATA_SIZEOF(flags_32bit),
QETH_PROT_IPV4);
if (!iob)
return -ENOMEM;
__ipa_cmd(iob)->data.setassparms.data.flags_32bit = (u32) no_entries;
rc = qeth_send_ipa_cmd(card, iob, qeth_l3_arp_cmd_cb, NULL);
if (rc)
QETH_DBF_MESSAGE(2, "Could not set number of ARP entries on device %x: %#x\n",
CARD_DEVID(card), rc);
return rc;
}
static __u32 get_arp_entry_size(struct qeth_card *card,
struct qeth_arp_query_data *qdata,
struct qeth_arp_entrytype *type, __u8 strip_entries)
{
__u32 rc;
__u8 is_hsi;
is_hsi = qdata->reply_bits == 5;
if (type->ip == QETHARP_IP_ADDR_V4) {
QETH_CARD_TEXT(card, 4, "arpev4");
if (strip_entries) {
rc = is_hsi ? sizeof(struct qeth_arp_qi_entry5_short) :
sizeof(struct qeth_arp_qi_entry7_short);
} else {
rc = is_hsi ? sizeof(struct qeth_arp_qi_entry5) :
sizeof(struct qeth_arp_qi_entry7);
}
} else if (type->ip == QETHARP_IP_ADDR_V6) {
QETH_CARD_TEXT(card, 4, "arpev6");
if (strip_entries) {
rc = is_hsi ?
sizeof(struct qeth_arp_qi_entry5_short_ipv6) :
sizeof(struct qeth_arp_qi_entry7_short_ipv6);
} else {
rc = is_hsi ?
sizeof(struct qeth_arp_qi_entry5_ipv6) :
sizeof(struct qeth_arp_qi_entry7_ipv6);
}
} else {
QETH_CARD_TEXT(card, 4, "arpinv");
rc = 0;
}
return rc;
}
static int arpentry_matches_prot(struct qeth_arp_entrytype *type, __u16 prot)
{
return (type->ip == QETHARP_IP_ADDR_V4 && prot == QETH_PROT_IPV4) ||
(type->ip == QETHARP_IP_ADDR_V6 && prot == QETH_PROT_IPV6);
}
static int qeth_l3_arp_query_cb(struct qeth_card *card,
struct qeth_reply *reply, unsigned long data)
{
struct qeth_ipa_cmd *cmd;
struct qeth_arp_query_data *qdata;
struct qeth_arp_query_info *qinfo;
int e;
int entrybytes_done;
int stripped_bytes;
__u8 do_strip_entries;
QETH_CARD_TEXT(card, 3, "arpquecb");
qinfo = (struct qeth_arp_query_info *) reply->param;
cmd = (struct qeth_ipa_cmd *) data;
QETH_CARD_TEXT_(card, 4, "%i", cmd->hdr.prot_version);
if (cmd->hdr.return_code) {
QETH_CARD_TEXT(card, 4, "arpcberr");
QETH_CARD_TEXT_(card, 4, "%i", cmd->hdr.return_code);
return qeth_l3_arp_makerc(cmd->hdr.return_code);
}
if (cmd->data.setassparms.hdr.return_code) {
cmd->hdr.return_code = cmd->data.setassparms.hdr.return_code;
QETH_CARD_TEXT(card, 4, "setaperr");
QETH_CARD_TEXT_(card, 4, "%i", cmd->hdr.return_code);
return qeth_l3_arp_makerc(cmd->hdr.return_code);
}
qdata = &cmd->data.setassparms.data.query_arp;
QETH_CARD_TEXT_(card, 4, "anoen%i", qdata->no_entries);
do_strip_entries = (qinfo->mask_bits & QETH_QARP_STRIP_ENTRIES) > 0;
stripped_bytes = do_strip_entries ? QETH_QARP_MEDIASPECIFIC_BYTES : 0;
entrybytes_done = 0;
for (e = 0; e < qdata->no_entries; ++e) {
char *cur_entry;
__u32 esize;
struct qeth_arp_entrytype *etype;
cur_entry = &qdata->data + entrybytes_done;
etype = &((struct qeth_arp_qi_entry5 *) cur_entry)->type;
if (!arpentry_matches_prot(etype, cmd->hdr.prot_version)) {
QETH_CARD_TEXT(card, 4, "pmis");
QETH_CARD_TEXT_(card, 4, "%i", etype->ip);
break;
}
esize = get_arp_entry_size(card, qdata, etype,
do_strip_entries);
QETH_CARD_TEXT_(card, 5, "esz%i", esize);
if (!esize)
break;
if ((qinfo->udata_len - qinfo->udata_offset) < esize) {
QETH_CARD_TEXT_(card, 4, "qaer3%i", -ENOSPC);
memset(qinfo->udata, 0, 4);
return -ENOSPC;
}
memcpy(qinfo->udata + qinfo->udata_offset,
&qdata->data + entrybytes_done + stripped_bytes,
esize);
entrybytes_done += esize + stripped_bytes;
qinfo->udata_offset += esize;
++qinfo->no_entries;
}
/* check if all replies received ... */
if (cmd->data.setassparms.hdr.seq_no <
cmd->data.setassparms.hdr.number_of_replies)
return 1;
QETH_CARD_TEXT_(card, 4, "nove%i", qinfo->no_entries);
memcpy(qinfo->udata, &qinfo->no_entries, 4);
/* keep STRIP_ENTRIES flag so the user program can distinguish
* stripped entries from normal ones */
if (qinfo->mask_bits & QETH_QARP_STRIP_ENTRIES)
qdata->reply_bits |= QETH_QARP_STRIP_ENTRIES;
memcpy(qinfo->udata + QETH_QARP_MASK_OFFSET, &qdata->reply_bits, 2);
QETH_CARD_TEXT_(card, 4, "rc%i", 0);
return 0;
}
static int qeth_l3_query_arp_cache_info(struct qeth_card *card,
enum qeth_prot_versions prot,
struct qeth_arp_query_info *qinfo)
{
struct qeth_cmd_buffer *iob;
struct qeth_ipa_cmd *cmd;
int rc;
QETH_CARD_TEXT_(card, 3, "qarpipv%i", prot);
iob = qeth_get_setassparms_cmd(card, IPA_ARP_PROCESSING,
IPA_CMD_ASS_ARP_QUERY_INFO,
SETASS_DATA_SIZEOF(query_arp), prot);
if (!iob)
return -ENOMEM;
cmd = __ipa_cmd(iob);
cmd->data.setassparms.data.query_arp.request_bits = 0x000F;
rc = qeth_send_ipa_cmd(card, iob, qeth_l3_arp_query_cb, qinfo);
if (rc)
QETH_DBF_MESSAGE(2, "Error while querying ARP cache on device %x: %#x\n",
CARD_DEVID(card), rc);
return rc;
}
static int qeth_l3_arp_query(struct qeth_card *card, char __user *udata)
{
struct qeth_arp_query_info qinfo = {0, };
int rc;
QETH_CARD_TEXT(card, 3, "arpquery");
if (!qeth_is_supported(card,/*IPA_QUERY_ARP_ADDR_INFO*/
IPA_ARP_PROCESSING)) {
QETH_CARD_TEXT(card, 3, "arpqnsup");
rc = -EOPNOTSUPP;
goto out;
}
/* get size of userspace buffer and mask_bits -> 6 bytes */
if (copy_from_user(&qinfo, udata, 6)) {
rc = -EFAULT;
goto out;
}
qinfo.udata = kzalloc(qinfo.udata_len, GFP_KERNEL);
if (!qinfo.udata) {
rc = -ENOMEM;
goto out;
}
qinfo.udata_offset = QETH_QARP_ENTRIES_OFFSET;
rc = qeth_l3_query_arp_cache_info(card, QETH_PROT_IPV4, &qinfo);
if (rc) {
if (copy_to_user(udata, qinfo.udata, 4))
rc = -EFAULT;
goto free_and_out;
}
if (qinfo.mask_bits & QETH_QARP_WITH_IPV6) {
/* fails in case of GuestLAN QDIO mode */
qeth_l3_query_arp_cache_info(card, QETH_PROT_IPV6, &qinfo);
}
if (copy_to_user(udata, qinfo.udata, qinfo.udata_len)) {
QETH_CARD_TEXT(card, 4, "qactf");
rc = -EFAULT;
goto free_and_out;
}
QETH_CARD_TEXT(card, 4, "qacts");
free_and_out:
kfree(qinfo.udata);
out:
return rc;
}
static int qeth_l3_arp_modify_entry(struct qeth_card *card,
struct qeth_arp_cache_entry *entry,
enum qeth_arp_process_subcmds arp_cmd)
{
struct qeth_arp_cache_entry *cmd_entry;
struct qeth_cmd_buffer *iob;
int rc;
if (arp_cmd == IPA_CMD_ASS_ARP_ADD_ENTRY)
QETH_CARD_TEXT(card, 3, "arpadd");
else
QETH_CARD_TEXT(card, 3, "arpdel");
/*
* currently GuestLAN only supports the ARP assist function
* IPA_CMD_ASS_ARP_QUERY_INFO, but not IPA_CMD_ASS_ARP_ADD_ENTRY;
* thus we say EOPNOTSUPP for this ARP function
*/
if (IS_VM_NIC(card))
return -EOPNOTSUPP;
if (!qeth_is_supported(card, IPA_ARP_PROCESSING)) {
return -EOPNOTSUPP;
}
iob = qeth_get_setassparms_cmd(card, IPA_ARP_PROCESSING, arp_cmd,
SETASS_DATA_SIZEOF(arp_entry),
QETH_PROT_IPV4);
if (!iob)
return -ENOMEM;
cmd_entry = &__ipa_cmd(iob)->data.setassparms.data.arp_entry;
ether_addr_copy(cmd_entry->macaddr, entry->macaddr);
memcpy(cmd_entry->ipaddr, entry->ipaddr, 4);
rc = qeth_send_ipa_cmd(card, iob, qeth_l3_arp_cmd_cb, NULL);
if (rc)
QETH_DBF_MESSAGE(2, "Could not modify (cmd: %#x) ARP entry on device %x: %#x\n",
arp_cmd, CARD_DEVID(card), rc);
return rc;
}
static int qeth_l3_arp_flush_cache(struct qeth_card *card)
{
struct qeth_cmd_buffer *iob;
int rc;
QETH_CARD_TEXT(card, 3, "arpflush");
/*
* currently GuestLAN only supports the ARP assist function
* IPA_CMD_ASS_ARP_QUERY_INFO, but not IPA_CMD_ASS_ARP_FLUSH_CACHE;
* thus we say EOPNOTSUPP for this ARP function
*/
if (IS_VM_NIC(card) || IS_IQD(card))
return -EOPNOTSUPP;
if (!qeth_is_supported(card, IPA_ARP_PROCESSING)) {
return -EOPNOTSUPP;
}
iob = qeth_get_setassparms_cmd(card, IPA_ARP_PROCESSING,
IPA_CMD_ASS_ARP_FLUSH_CACHE, 0,
QETH_PROT_IPV4);
if (!iob)
return -ENOMEM;
rc = qeth_send_ipa_cmd(card, iob, qeth_l3_arp_cmd_cb, NULL);
if (rc)
QETH_DBF_MESSAGE(2, "Could not flush ARP cache on device %x: %#x\n",
CARD_DEVID(card), rc);
return rc;
}
static int qeth_l3_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
{
struct qeth_card *card = dev->ml_priv;
struct qeth_arp_cache_entry arp_entry;
enum qeth_arp_process_subcmds arp_cmd;
int rc = 0;
switch (cmd) {
case SIOC_QETH_ARP_SET_NO_ENTRIES:
if (!capable(CAP_NET_ADMIN)) {
rc = -EPERM;
break;
}
rc = qeth_l3_arp_set_no_entries(card, rq->ifr_ifru.ifru_ivalue);
break;
case SIOC_QETH_ARP_QUERY_INFO:
if (!capable(CAP_NET_ADMIN)) {
rc = -EPERM;
break;
}
rc = qeth_l3_arp_query(card, rq->ifr_ifru.ifru_data);
break;
case SIOC_QETH_ARP_ADD_ENTRY:
case SIOC_QETH_ARP_REMOVE_ENTRY:
if (!capable(CAP_NET_ADMIN))
return -EPERM;
if (copy_from_user(&arp_entry, rq->ifr_data, sizeof(arp_entry)))
return -EFAULT;
arp_cmd = (cmd == SIOC_QETH_ARP_ADD_ENTRY) ?
IPA_CMD_ASS_ARP_ADD_ENTRY :
IPA_CMD_ASS_ARP_REMOVE_ENTRY;
return qeth_l3_arp_modify_entry(card, &arp_entry, arp_cmd);
case SIOC_QETH_ARP_FLUSH_CACHE:
if (!capable(CAP_NET_ADMIN)) {
rc = -EPERM;
break;
}
rc = qeth_l3_arp_flush_cache(card);
break;
default:
rc = -EOPNOTSUPP;
}
return rc;
}
static int qeth_l3_get_cast_type_rcu(struct sk_buff *skb, struct dst_entry *dst,
int ipv)
{
struct neighbour *n = NULL;
if (dst)
n = dst_neigh_lookup_skb(dst, skb);
if (n) {
int cast_type = n->type;
neigh_release(n);
if ((cast_type == RTN_BROADCAST) ||
(cast_type == RTN_MULTICAST) ||
(cast_type == RTN_ANYCAST))
return cast_type;
return RTN_UNICAST;
}
/* no neighbour (eg AF_PACKET), fall back to target's IP address ... */
switch (ipv) {
case 4:
if (ipv4_is_lbcast(ip_hdr(skb)->daddr))
return RTN_BROADCAST;
return ipv4_is_multicast(ip_hdr(skb)->daddr) ?
RTN_MULTICAST : RTN_UNICAST;
case 6:
return ipv6_addr_is_multicast(&ipv6_hdr(skb)->daddr) ?
RTN_MULTICAST : RTN_UNICAST;
default:
/* ... and MAC address */
return qeth_get_ether_cast_type(skb);
}
}
static int qeth_l3_get_cast_type(struct sk_buff *skb)
{
int ipv = qeth_get_ip_version(skb);
struct dst_entry *dst;
int cast_type;
rcu_read_lock();
dst = qeth_dst_check_rcu(skb, ipv);
cast_type = qeth_l3_get_cast_type_rcu(skb, dst, ipv);
rcu_read_unlock();
return cast_type;
}
static u8 qeth_l3_cast_type_to_flag(int cast_type)
{
if (cast_type == RTN_MULTICAST)
return QETH_CAST_MULTICAST;
if (cast_type == RTN_ANYCAST)
return QETH_CAST_ANYCAST;
if (cast_type == RTN_BROADCAST)
return QETH_CAST_BROADCAST;
return QETH_CAST_UNICAST;
}
static void qeth_l3_fill_header(struct qeth_qdio_out_q *queue,
struct qeth_hdr *hdr, struct sk_buff *skb,
int ipv, unsigned int data_len)
{
struct qeth_hdr_layer3 *l3_hdr = &hdr->hdr.l3;
struct vlan_ethhdr *veth = vlan_eth_hdr(skb);
struct qeth_card *card = queue->card;
struct dst_entry *dst;
int cast_type;
hdr->hdr.l3.length = data_len;
if (skb_is_gso(skb)) {
hdr->hdr.l3.id = QETH_HEADER_TYPE_L3_TSO;
} else {
hdr->hdr.l3.id = QETH_HEADER_TYPE_LAYER3;
if (skb->protocol == htons(ETH_P_AF_IUCV)) {
l3_hdr->flags = QETH_HDR_IPV6 | QETH_CAST_UNICAST;
l3_hdr->next_hop.ipv6_addr.s6_addr16[0] = htons(0xfe80);
memcpy(&l3_hdr->next_hop.ipv6_addr.s6_addr32[2],
iucv_trans_hdr(skb)->destUserID, 8);
return;
}
if (skb->ip_summed == CHECKSUM_PARTIAL) {
qeth_tx_csum(skb, &hdr->hdr.l3.ext_flags, ipv);
/* some HW requires combined L3+L4 csum offload: */
if (ipv == 4)
hdr->hdr.l3.ext_flags |= QETH_HDR_EXT_CSUM_HDR_REQ;
}
}
if (ipv == 4 || IS_IQD(card)) {
/* NETIF_F_HW_VLAN_CTAG_TX */
if (skb_vlan_tag_present(skb)) {
hdr->hdr.l3.ext_flags |= QETH_HDR_EXT_VLAN_FRAME;
hdr->hdr.l3.vlan_id = skb_vlan_tag_get(skb);
}
} else if (veth->h_vlan_proto == htons(ETH_P_8021Q)) {
hdr->hdr.l3.ext_flags |= QETH_HDR_EXT_INCLUDE_VLAN_TAG;
hdr->hdr.l3.vlan_id = ntohs(veth->h_vlan_TCI);
}
rcu_read_lock();
dst = qeth_dst_check_rcu(skb, ipv);
if (IS_IQD(card) && skb_get_queue_mapping(skb) != QETH_IQD_MCAST_TXQ)
cast_type = RTN_UNICAST;
else
cast_type = qeth_l3_get_cast_type_rcu(skb, dst, ipv);
l3_hdr->flags |= qeth_l3_cast_type_to_flag(cast_type);
if (ipv == 4) {
struct rtable *rt = (struct rtable *) dst;
*((__be32 *) &hdr->hdr.l3.next_hop.ipv4.addr) = (rt) ?
rt_nexthop(rt, ip_hdr(skb)->daddr) :
ip_hdr(skb)->daddr;
} else if (ipv == 6) {
struct rt6_info *rt = (struct rt6_info *) dst;
if (rt && !ipv6_addr_any(&rt->rt6i_gateway))
l3_hdr->next_hop.ipv6_addr = rt->rt6i_gateway;
else
l3_hdr->next_hop.ipv6_addr = ipv6_hdr(skb)->daddr;
hdr->hdr.l3.flags |= QETH_HDR_IPV6;
if (!IS_IQD(card))
hdr->hdr.l3.flags |= QETH_HDR_PASSTHRU;
} else {
/* OSA only: */
l3_hdr->flags |= QETH_HDR_PASSTHRU;
}
rcu_read_unlock();
}
static void qeth_l3_fixup_headers(struct sk_buff *skb)
{
struct iphdr *iph = ip_hdr(skb);
/* this is safe, IPv6 traffic takes a different path */
if (skb->ip_summed == CHECKSUM_PARTIAL)
iph->check = 0;
if (skb_is_gso(skb)) {
iph->tot_len = 0;
tcp_hdr(skb)->check = ~tcp_v4_check(0, iph->saddr,
iph->daddr, 0);
}
}
static int qeth_l3_xmit(struct qeth_card *card, struct sk_buff *skb,
struct qeth_qdio_out_q *queue, int ipv)
{
unsigned int hw_hdr_len;
int rc;
/* re-use the L2 header area for the HW header: */
hw_hdr_len = skb_is_gso(skb) ? sizeof(struct qeth_hdr_tso) :
sizeof(struct qeth_hdr);
rc = skb_cow_head(skb, hw_hdr_len - ETH_HLEN);
if (rc)
return rc;
skb_pull(skb, ETH_HLEN);
qeth_l3_fixup_headers(skb);
return qeth_xmit(card, skb, queue, ipv, qeth_l3_fill_header);
}
static netdev_tx_t qeth_l3_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);
int ipv = qeth_get_ip_version(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)) {
queue = card->qdio.out_qs[qeth_iqd_translate_txq(dev, txq)];
if (card->options.sniffer)
goto tx_drop;
if ((card->options.cq != QETH_CQ_ENABLED && !ipv) ||
(card->options.cq == QETH_CQ_ENABLED &&
skb->protocol != htons(ETH_P_AF_IUCV)))
goto tx_drop;
} else {
queue = card->qdio.out_qs[txq];
}
if (!(dev->flags & IFF_BROADCAST) &&
qeth_l3_get_cast_type(skb) == RTN_BROADCAST)
goto tx_drop;
if (ipv == 4 || IS_IQD(card))
rc = qeth_l3_xmit(card, skb, queue, ipv);
else
rc = qeth_xmit(card, skb, queue, ipv, qeth_l3_fill_header);
if (!rc)
return NETDEV_TX_OK;
tx_drop:
QETH_TXQ_STAT_INC(queue, tx_dropped);
kfree_skb(skb);
return NETDEV_TX_OK;
}
static void qeth_l3_set_rx_mode(struct net_device *dev)
{
struct qeth_card *card = dev->ml_priv;
schedule_work(&card->rx_mode_work);
}
/*
* we need NOARP for IPv4 but we want neighbor solicitation for IPv6. Setting
* NOARP on the netdevice is no option because it also turns off neighbor
* solicitation. For IPv4 we install a neighbor_setup function. We don't want
* arp resolution but we want the hard header (packet socket will work
* e.g. tcpdump)
*/
static int qeth_l3_neigh_setup_noarp(struct neighbour *n)
{
n->nud_state = NUD_NOARP;
memcpy(n->ha, "FAKELL", 6);
n->output = n->ops->connected_output;
return 0;
}
static int
qeth_l3_neigh_setup(struct net_device *dev, struct neigh_parms *np)
{
if (np->tbl->family == AF_INET)
np->neigh_setup = qeth_l3_neigh_setup_noarp;
return 0;
}
static netdev_features_t qeth_l3_osa_features_check(struct sk_buff *skb,
struct net_device *dev,
netdev_features_t features)
{
if (qeth_get_ip_version(skb) != 4)
features &= ~NETIF_F_HW_VLAN_CTAG_TX;
return qeth_features_check(skb, dev, features);
}
static u16 qeth_l3_iqd_select_queue(struct net_device *dev, struct sk_buff *skb,
struct net_device *sb_dev)
{
return qeth_iqd_select_queue(dev, skb, qeth_l3_get_cast_type(skb),
sb_dev);
}
static u16 qeth_l3_osa_select_queue(struct net_device *dev, struct sk_buff *skb,
struct net_device *sb_dev)
{
struct qeth_card *card = dev->ml_priv;
return qeth_get_priority_queue(card, skb);
}
static const struct net_device_ops qeth_l3_netdev_ops = {
.ndo_open = qeth_open,
.ndo_stop = qeth_stop,
.ndo_get_stats64 = qeth_get_stats64,
.ndo_start_xmit = qeth_l3_hard_start_xmit,
.ndo_select_queue = qeth_l3_iqd_select_queue,
.ndo_validate_addr = eth_validate_addr,
.ndo_set_rx_mode = qeth_l3_set_rx_mode,
.ndo_do_ioctl = qeth_do_ioctl,
.ndo_fix_features = qeth_fix_features,
.ndo_set_features = qeth_set_features,
.ndo_vlan_rx_add_vid = qeth_l3_vlan_rx_add_vid,
.ndo_vlan_rx_kill_vid = qeth_l3_vlan_rx_kill_vid,
.ndo_tx_timeout = qeth_tx_timeout,
};
static const struct net_device_ops qeth_l3_osa_netdev_ops = {
.ndo_open = qeth_open,
.ndo_stop = qeth_stop,
.ndo_get_stats64 = qeth_get_stats64,
.ndo_start_xmit = qeth_l3_hard_start_xmit,
.ndo_features_check = qeth_l3_osa_features_check,
.ndo_select_queue = qeth_l3_osa_select_queue,
.ndo_validate_addr = eth_validate_addr,
.ndo_set_rx_mode = qeth_l3_set_rx_mode,
.ndo_do_ioctl = qeth_do_ioctl,
.ndo_fix_features = qeth_fix_features,
.ndo_set_features = qeth_set_features,
.ndo_vlan_rx_add_vid = qeth_l3_vlan_rx_add_vid,
.ndo_vlan_rx_kill_vid = qeth_l3_vlan_rx_kill_vid,
.ndo_tx_timeout = qeth_tx_timeout,
.ndo_neigh_setup = qeth_l3_neigh_setup,
};
static int qeth_l3_setup_netdev(struct qeth_card *card, bool carrier_ok)
{
unsigned int headroom;
int rc;
if (IS_OSD(card) || IS_OSX(card)) {
if ((card->info.link_type == QETH_LINK_TYPE_LANE_TR) ||
(card->info.link_type == QETH_LINK_TYPE_HSTR)) {
pr_info("qeth_l3: ignoring TR device\n");
return -ENODEV;
}
card->dev->netdev_ops = &qeth_l3_osa_netdev_ops;
/*IPv6 address autoconfiguration stuff*/
qeth_l3_get_unique_id(card);
if (!(card->info.unique_id & UNIQUE_ID_NOT_BY_CARD))
card->dev->dev_id = card->info.unique_id & 0xffff;
if (!IS_VM_NIC(card)) {
card->dev->features |= NETIF_F_SG;
card->dev->hw_features |= NETIF_F_TSO |
NETIF_F_RXCSUM | NETIF_F_IP_CSUM;
card->dev->vlan_features |= NETIF_F_TSO |
NETIF_F_RXCSUM | 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_supported6(card, IPA_OUTBOUND_TSO)) {
card->dev->hw_features |= NETIF_F_TSO6;
card->dev->vlan_features |= NETIF_F_TSO6;
}
/* allow for de-acceleration of NETIF_F_HW_VLAN_CTAG_TX: */
if (card->dev->hw_features & NETIF_F_TSO6)
headroom = sizeof(struct qeth_hdr_tso) + VLAN_HLEN;
else if (card->dev->hw_features & NETIF_F_TSO)
headroom = sizeof(struct qeth_hdr_tso);
else
headroom = sizeof(struct qeth_hdr) + VLAN_HLEN;
} else if (IS_IQD(card)) {
card->dev->flags |= IFF_NOARP;
card->dev->netdev_ops = &qeth_l3_netdev_ops;
headroom = sizeof(struct qeth_hdr) - ETH_HLEN;
rc = qeth_l3_iqd_read_initial_mac(card);
if (rc)
goto out;
} else
return -ENODEV;
card->dev->needed_headroom = headroom;
card->dev->features |= NETIF_F_HW_VLAN_CTAG_TX |
NETIF_F_HW_VLAN_CTAG_RX |
NETIF_F_HW_VLAN_CTAG_FILTER;
netif_keep_dst(card->dev);
if (card->dev->hw_features & (NETIF_F_TSO | NETIF_F_TSO6))
netif_set_gso_max_size(card->dev,
PAGE_SIZE * (QETH_MAX_BUFFER_ELEMENTS(card) - 1));
netif_napi_add(card->dev, &card->napi, qeth_poll, QETH_NAPI_WEIGHT);
rc = register_netdev(card->dev);
if (!rc && carrier_ok)
netif_carrier_on(card->dev);
out:
if (rc)
card->dev->netdev_ops = NULL;
return rc;
}
static const struct device_type qeth_l3_devtype = {
.name = "qeth_layer3",
.groups = qeth_l3_attr_groups,
};
static int qeth_l3_probe_device(struct ccwgroup_device *gdev)
{
struct qeth_card *card = dev_get_drvdata(&gdev->dev);
int rc;
hash_init(card->ip_htable);
mutex_init(&card->ip_lock);
card->cmd_wq = alloc_ordered_workqueue("%s_cmd", 0,
dev_name(&gdev->dev));
if (!card->cmd_wq)
return -ENOMEM;
if (gdev->dev.type == &qeth_generic_devtype) {
rc = qeth_l3_create_device_attributes(&gdev->dev);
if (rc) {
destroy_workqueue(card->cmd_wq);
return rc;
}
}
hash_init(card->ip_mc_htable);
INIT_WORK(&card->rx_mode_work, qeth_l3_rx_mode_work);
return 0;
}
static void qeth_l3_remove_device(struct ccwgroup_device *cgdev)
{
struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
if (cgdev->dev.type == &qeth_generic_devtype)
qeth_l3_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_l3_set_offline(cgdev);
cancel_work_sync(&card->close_dev_work);
if (qeth_netdev_is_registered(card->dev))
unregister_netdev(card->dev);
flush_workqueue(card->cmd_wq);
destroy_workqueue(card->cmd_wq);
qeth_l3_clear_ip_htable(card, 0);
qeth_l3_clear_ipato_list(card);
}
static int qeth_l3_set_online(struct ccwgroup_device *gdev)
{
struct qeth_card *card = dev_get_drvdata(&gdev->dev);
struct net_device *dev = card->dev;
int rc = 0;
bool carrier_ok;
mutex_lock(&card->discipline_mutex);
mutex_lock(&card->conf_mutex);
QETH_CARD_TEXT(card, 2, "setonlin");
rc = qeth_core_hardsetup_card(card, &carrier_ok);
if (rc) {
QETH_CARD_TEXT_(card, 2, "2err%04x", rc);
rc = -ENODEV;
goto out_remove;
}
card->state = CARD_STATE_HARDSETUP;
qeth_print_status_message(card);
/* softsetup */
QETH_CARD_TEXT(card, 2, "softsetp");
rc = qeth_l3_setadapter_parms(card);
if (rc)
QETH_CARD_TEXT_(card, 2, "2err%04x", rc);
if (!card->options.sniffer) {
rc = qeth_l3_start_ipassists(card);
if (rc) {
QETH_CARD_TEXT_(card, 2, "3err%d", rc);
goto out_remove;
}
rc = qeth_l3_setrouting_v4(card);
if (rc)
QETH_CARD_TEXT_(card, 2, "4err%04x", rc);
rc = qeth_l3_setrouting_v6(card);
if (rc)
QETH_CARD_TEXT_(card, 2, "5err%04x", rc);
}
rc = qeth_init_qdio_queues(card);
if (rc) {
QETH_CARD_TEXT_(card, 2, "6err%d", rc);
rc = -ENODEV;
goto out_remove;
}
card->state = CARD_STATE_SOFTSETUP;
qeth_set_allowed_threads(card, 0xffffffff, 0);
qeth_l3_recover_ip(card);
if (!qeth_netdev_is_registered(dev)) {
rc = qeth_l3_setup_netdev(card, carrier_ok);
if (rc)
goto out_remove;
} else {
rtnl_lock();
if (carrier_ok)
netif_carrier_on(dev);
else
netif_carrier_off(dev);
netif_device_attach(dev);
qeth_enable_hw_features(dev);
if (card->info.open_when_online) {
card->info.open_when_online = 0;
dev_open(dev, NULL);
}
rtnl_unlock();
}
qeth_trace_features(card);
/* 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_l3_stop_card(card);
qeth_stop_channel(&card->data);
qeth_stop_channel(&card->write);
qeth_stop_channel(&card->read);
qdio_free(CARD_DDEV(card));
mutex_unlock(&card->conf_mutex);
mutex_unlock(&card->discipline_mutex);
return rc;
}
static int __qeth_l3_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;
mutex_lock(&card->discipline_mutex);
mutex_lock(&card->conf_mutex);
QETH_CARD_TEXT(card, 3, "setoffl");
if ((!recovery_mode && card->info.hwtrap) || card->info.hwtrap == 2) {
qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
card->info.hwtrap = 1;
}
rtnl_lock();
card->info.open_when_online = card->dev->flags & IFF_UP;
dev_close(card->dev);
netif_device_detach(card->dev);
netif_carrier_off(card->dev);
rtnl_unlock();
qeth_l3_stop_card(card);
if (card->options.cq == QETH_CQ_ENABLED) {
rtnl_lock();
call_netdevice_notifiers(NETDEV_REBOOT, card->dev);
rtnl_unlock();
}
rc = qeth_stop_channel(&card->data);
rc2 = qeth_stop_channel(&card->write);
rc3 = qeth_stop_channel(&card->read);
if (!rc)
rc = (rc2) ? rc2 : rc3;
if (rc)
QETH_CARD_TEXT_(card, 2, "1err%d", rc);
qdio_free(CARD_DDEV(card));
/* 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_l3_set_offline(struct ccwgroup_device *cgdev)
{
return __qeth_l3_set_offline(cgdev, 0);
}
static int qeth_l3_recover(void *ptr)
{
struct qeth_card *card;
int rc = 0;
card = (struct qeth_card *) ptr;
QETH_CARD_TEXT(card, 2, "recover1");
QETH_CARD_HEX(card, 2, &card, sizeof(void *));
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_l3_set_offline(card->gdev, 1);
rc = qeth_l3_set_online(card->gdev);
if (!rc)
dev_info(&card->gdev->dev,
"Device successfully recovered!\n");
else {
ccwgroup_set_offline(card->gdev);
dev_warn(&card->gdev->dev, "The qeth device driver "
"failed to recover an error on the device\n");
}
qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
qeth_clear_thread_running_bit(card, QETH_RECOVER_THREAD);
return 0;
}
/* Returns zero if the command is successfully "consumed" */
static int qeth_l3_control_event(struct qeth_card *card,
struct qeth_ipa_cmd *cmd)
{
return 1;
}
struct qeth_discipline qeth_l3_discipline = {
.devtype = &qeth_l3_devtype,
.process_rx_buffer = qeth_l3_process_inbound_buffer,
.recover = qeth_l3_recover,
.setup = qeth_l3_probe_device,
.remove = qeth_l3_remove_device,
.set_online = qeth_l3_set_online,
.set_offline = qeth_l3_set_offline,
.do_ioctl = qeth_l3_do_ioctl,
.control_event_handler = qeth_l3_control_event,
};
EXPORT_SYMBOL_GPL(qeth_l3_discipline);
static int qeth_l3_handle_ip_event(struct qeth_card *card,
struct qeth_ipaddr *addr,
unsigned long event)
{
switch (event) {
case NETDEV_UP:
qeth_l3_modify_ip(card, addr, true);
return NOTIFY_OK;
case NETDEV_DOWN:
qeth_l3_modify_ip(card, addr, false);
return NOTIFY_OK;
default:
return NOTIFY_DONE;
}
}
struct qeth_l3_ip_event_work {
struct work_struct work;
struct qeth_card *card;
struct qeth_ipaddr addr;
};
#define to_ip_work(w) container_of((w), struct qeth_l3_ip_event_work, work)
static void qeth_l3_add_ip_worker(struct work_struct *work)
{
struct qeth_l3_ip_event_work *ip_work = to_ip_work(work);
qeth_l3_modify_ip(ip_work->card, &ip_work->addr, true);
kfree(work);
}
static void qeth_l3_delete_ip_worker(struct work_struct *work)
{
struct qeth_l3_ip_event_work *ip_work = to_ip_work(work);
qeth_l3_modify_ip(ip_work->card, &ip_work->addr, false);
kfree(work);
}
static struct qeth_card *qeth_l3_get_card_from_dev(struct net_device *dev)
{
if (is_vlan_dev(dev))
dev = vlan_dev_real_dev(dev);
if (dev->netdev_ops == &qeth_l3_osa_netdev_ops ||
dev->netdev_ops == &qeth_l3_netdev_ops)
return (struct qeth_card *) dev->ml_priv;
return NULL;
}
static int qeth_l3_ip_event(struct notifier_block *this,
unsigned long event, void *ptr)
{
struct in_ifaddr *ifa = (struct in_ifaddr *)ptr;
struct net_device *dev = ifa->ifa_dev->dev;
struct qeth_ipaddr addr;
struct qeth_card *card;
if (dev_net(dev) != &init_net)
return NOTIFY_DONE;
card = qeth_l3_get_card_from_dev(dev);
if (!card)
return NOTIFY_DONE;
QETH_CARD_TEXT(card, 3, "ipevent");
qeth_l3_init_ipaddr(&addr, QETH_IP_TYPE_NORMAL, QETH_PROT_IPV4);
addr.u.a4.addr = ifa->ifa_address;
addr.u.a4.mask = be32_to_cpu(ifa->ifa_mask);
return qeth_l3_handle_ip_event(card, &addr, event);
}
static struct notifier_block qeth_l3_ip_notifier = {
qeth_l3_ip_event,
NULL,
};
static int qeth_l3_ip6_event(struct notifier_block *this,
unsigned long event, void *ptr)
{
struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)ptr;
struct net_device *dev = ifa->idev->dev;
struct qeth_l3_ip_event_work *ip_work;
struct qeth_card *card;
if (event != NETDEV_UP && event != NETDEV_DOWN)
return NOTIFY_DONE;
card = qeth_l3_get_card_from_dev(dev);
if (!card)
return NOTIFY_DONE;
QETH_CARD_TEXT(card, 3, "ip6event");
if (!qeth_is_supported(card, IPA_IPV6))
return NOTIFY_DONE;
ip_work = kmalloc(sizeof(*ip_work), GFP_ATOMIC);
if (!ip_work)
return NOTIFY_DONE;
if (event == NETDEV_UP)
INIT_WORK(&ip_work->work, qeth_l3_add_ip_worker);
else
INIT_WORK(&ip_work->work, qeth_l3_delete_ip_worker);
ip_work->card = card;
qeth_l3_init_ipaddr(&ip_work->addr, QETH_IP_TYPE_NORMAL,
QETH_PROT_IPV6);
ip_work->addr.u.a6.addr = ifa->addr;
ip_work->addr.u.a6.pfxlen = ifa->prefix_len;
queue_work(card->cmd_wq, &ip_work->work);
return NOTIFY_OK;
}
static struct notifier_block qeth_l3_ip6_notifier = {
qeth_l3_ip6_event,
NULL,
};
static int qeth_l3_register_notifiers(void)
{
int rc;
QETH_DBF_TEXT(SETUP, 5, "regnotif");
rc = register_inetaddr_notifier(&qeth_l3_ip_notifier);
if (rc)
return rc;
rc = register_inet6addr_notifier(&qeth_l3_ip6_notifier);
if (rc) {
unregister_inetaddr_notifier(&qeth_l3_ip_notifier);
return rc;
}
return 0;
}
static void qeth_l3_unregister_notifiers(void)
{
QETH_DBF_TEXT(SETUP, 5, "unregnot");
WARN_ON(unregister_inetaddr_notifier(&qeth_l3_ip_notifier));
WARN_ON(unregister_inet6addr_notifier(&qeth_l3_ip6_notifier));
}
static int __init qeth_l3_init(void)
{
pr_info("register layer 3 discipline\n");
return qeth_l3_register_notifiers();
}
static void __exit qeth_l3_exit(void)
{
qeth_l3_unregister_notifiers();
pr_info("unregister layer 3 discipline\n");
}
module_init(qeth_l3_init);
module_exit(qeth_l3_exit);
MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
MODULE_DESCRIPTION("qeth layer 3 discipline");
MODULE_LICENSE("GPL");
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