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linux/drivers/s390/net/qeth_core_main.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/compat.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/log2.h>
#include <linux/ip.h>
#include <linux/tcp.h>
#include <linux/mii.h>
#include <linux/mm.h>
#include <linux/kthread.h>
#include <linux/slab.h>
#include <linux/if_vlan.h>
#include <linux/netdevice.h>
#include <linux/netdev_features.h>
#include <linux/rcutree.h>
#include <linux/skbuff.h>
#include <linux/vmalloc.h>
#include <net/iucv/af_iucv.h>
#include <net/dsfield.h>
#include <asm/ebcdic.h>
#include <asm/chpid.h>
#include <asm/io.h>
#include <asm/sysinfo.h>
#include <asm/diag.h>
#include <asm/cio.h>
#include <asm/ccwdev.h>
#include <asm/cpcmd.h>
#include "qeth_core.h"
struct qeth_dbf_info qeth_dbf[QETH_DBF_INFOS] = {
/* define dbf - Name, Pages, Areas, Maxlen, Level, View, Handle */
/* N P A M L V H */
[QETH_DBF_SETUP] = {"qeth_setup",
8, 1, 8, 5, &debug_hex_ascii_view, NULL},
[QETH_DBF_MSG] = {"qeth_msg", 8, 1, 11 * sizeof(long), 3,
&debug_sprintf_view, NULL},
[QETH_DBF_CTRL] = {"qeth_control",
8, 1, QETH_DBF_CTRL_LEN, 5, &debug_hex_ascii_view, NULL},
};
EXPORT_SYMBOL_GPL(qeth_dbf);
struct kmem_cache *qeth_core_header_cache;
EXPORT_SYMBOL_GPL(qeth_core_header_cache);
static struct kmem_cache *qeth_qdio_outbuf_cache;
static struct device *qeth_core_root_dev;
static struct dentry *qeth_debugfs_root;
static struct lock_class_key qdio_out_skb_queue_key;
static void qeth_issue_next_read_cb(struct qeth_card *card,
struct qeth_cmd_buffer *iob,
unsigned int data_length);
static int qeth_qdio_establish(struct qeth_card *);
static void qeth_free_qdio_queues(struct qeth_card *card);
static void qeth_notify_skbs(struct qeth_qdio_out_q *queue,
struct qeth_qdio_out_buffer *buf,
enum iucv_tx_notify notification);
static void qeth_tx_complete_buf(struct qeth_qdio_out_buffer *buf, bool error,
int budget);
static int qeth_init_qdio_out_buf(struct qeth_qdio_out_q *, int);
static void qeth_close_dev_handler(struct work_struct *work)
{
struct qeth_card *card;
card = container_of(work, struct qeth_card, close_dev_work);
QETH_CARD_TEXT(card, 2, "cldevhdl");
ccwgroup_set_offline(card->gdev);
}
static const char *qeth_get_cardname(struct qeth_card *card)
{
if (IS_VM_NIC(card)) {
switch (card->info.type) {
case QETH_CARD_TYPE_OSD:
return " Virtual NIC QDIO";
case QETH_CARD_TYPE_IQD:
return " Virtual NIC Hiper";
case QETH_CARD_TYPE_OSM:
return " Virtual NIC QDIO - OSM";
case QETH_CARD_TYPE_OSX:
return " Virtual NIC QDIO - OSX";
default:
return " unknown";
}
} else {
switch (card->info.type) {
case QETH_CARD_TYPE_OSD:
return " OSD Express";
case QETH_CARD_TYPE_IQD:
return " HiperSockets";
case QETH_CARD_TYPE_OSN:
return " OSN QDIO";
case QETH_CARD_TYPE_OSM:
return " OSM QDIO";
case QETH_CARD_TYPE_OSX:
return " OSX QDIO";
default:
return " unknown";
}
}
return " n/a";
}
/* max length to be returned: 14 */
const char *qeth_get_cardname_short(struct qeth_card *card)
{
if (IS_VM_NIC(card)) {
switch (card->info.type) {
case QETH_CARD_TYPE_OSD:
return "Virt.NIC QDIO";
case QETH_CARD_TYPE_IQD:
return "Virt.NIC Hiper";
case QETH_CARD_TYPE_OSM:
return "Virt.NIC OSM";
case QETH_CARD_TYPE_OSX:
return "Virt.NIC OSX";
default:
return "unknown";
}
} else {
switch (card->info.type) {
case QETH_CARD_TYPE_OSD:
switch (card->info.link_type) {
case QETH_LINK_TYPE_FAST_ETH:
return "OSD_100";
case QETH_LINK_TYPE_HSTR:
return "HSTR";
case QETH_LINK_TYPE_GBIT_ETH:
return "OSD_1000";
case QETH_LINK_TYPE_10GBIT_ETH:
return "OSD_10GIG";
case QETH_LINK_TYPE_25GBIT_ETH:
return "OSD_25GIG";
case QETH_LINK_TYPE_LANE_ETH100:
return "OSD_FE_LANE";
case QETH_LINK_TYPE_LANE_TR:
return "OSD_TR_LANE";
case QETH_LINK_TYPE_LANE_ETH1000:
return "OSD_GbE_LANE";
case QETH_LINK_TYPE_LANE:
return "OSD_ATM_LANE";
default:
return "OSD_Express";
}
case QETH_CARD_TYPE_IQD:
return "HiperSockets";
case QETH_CARD_TYPE_OSN:
return "OSN";
case QETH_CARD_TYPE_OSM:
return "OSM_1000";
case QETH_CARD_TYPE_OSX:
return "OSX_10GIG";
default:
return "unknown";
}
}
return "n/a";
}
void qeth_set_allowed_threads(struct qeth_card *card, unsigned long threads,
int clear_start_mask)
{
unsigned long flags;
spin_lock_irqsave(&card->thread_mask_lock, flags);
card->thread_allowed_mask = threads;
if (clear_start_mask)
card->thread_start_mask &= threads;
spin_unlock_irqrestore(&card->thread_mask_lock, flags);
wake_up(&card->wait_q);
}
EXPORT_SYMBOL_GPL(qeth_set_allowed_threads);
int qeth_threads_running(struct qeth_card *card, unsigned long threads)
{
unsigned long flags;
int rc = 0;
spin_lock_irqsave(&card->thread_mask_lock, flags);
rc = (card->thread_running_mask & threads);
spin_unlock_irqrestore(&card->thread_mask_lock, flags);
return rc;
}
EXPORT_SYMBOL_GPL(qeth_threads_running);
void qeth_clear_working_pool_list(struct qeth_card *card)
{
struct qeth_buffer_pool_entry *pool_entry, *tmp;
QETH_CARD_TEXT(card, 5, "clwrklst");
list_for_each_entry_safe(pool_entry, tmp,
&card->qdio.in_buf_pool.entry_list, list){
list_del(&pool_entry->list);
}
}
EXPORT_SYMBOL_GPL(qeth_clear_working_pool_list);
static void qeth_free_pool_entry(struct qeth_buffer_pool_entry *entry)
{
unsigned int i;
for (i = 0; i < ARRAY_SIZE(entry->elements); i++) {
if (entry->elements[i])
__free_page(entry->elements[i]);
}
kfree(entry);
}
static void qeth_free_buffer_pool(struct qeth_card *card)
{
struct qeth_buffer_pool_entry *entry, *tmp;
list_for_each_entry_safe(entry, tmp, &card->qdio.init_pool.entry_list,
init_list) {
list_del(&entry->init_list);
qeth_free_pool_entry(entry);
}
}
static struct qeth_buffer_pool_entry *qeth_alloc_pool_entry(unsigned int pages)
{
struct qeth_buffer_pool_entry *entry;
unsigned int i;
entry = kzalloc(sizeof(*entry), GFP_KERNEL);
if (!entry)
return NULL;
for (i = 0; i < pages; i++) {
entry->elements[i] = __dev_alloc_page(GFP_KERNEL);
if (!entry->elements[i]) {
qeth_free_pool_entry(entry);
return NULL;
}
}
return entry;
}
static int qeth_alloc_buffer_pool(struct qeth_card *card)
{
unsigned int buf_elements = QETH_MAX_BUFFER_ELEMENTS(card);
unsigned int i;
QETH_CARD_TEXT(card, 5, "alocpool");
for (i = 0; i < card->qdio.init_pool.buf_count; ++i) {
struct qeth_buffer_pool_entry *entry;
entry = qeth_alloc_pool_entry(buf_elements);
if (!entry) {
qeth_free_buffer_pool(card);
return -ENOMEM;
}
list_add(&entry->init_list, &card->qdio.init_pool.entry_list);
}
return 0;
}
int qeth_resize_buffer_pool(struct qeth_card *card, unsigned int count)
{
unsigned int buf_elements = QETH_MAX_BUFFER_ELEMENTS(card);
struct qeth_qdio_buffer_pool *pool = &card->qdio.init_pool;
struct qeth_buffer_pool_entry *entry, *tmp;
int delta = count - pool->buf_count;
LIST_HEAD(entries);
QETH_CARD_TEXT(card, 2, "realcbp");
/* Defer until queue is allocated: */
if (!card->qdio.in_q)
goto out;
/* Remove entries from the pool: */
while (delta < 0) {
entry = list_first_entry(&pool->entry_list,
struct qeth_buffer_pool_entry,
init_list);
list_del(&entry->init_list);
qeth_free_pool_entry(entry);
delta++;
}
/* Allocate additional entries: */
while (delta > 0) {
entry = qeth_alloc_pool_entry(buf_elements);
if (!entry) {
list_for_each_entry_safe(entry, tmp, &entries,
init_list) {
list_del(&entry->init_list);
qeth_free_pool_entry(entry);
}
return -ENOMEM;
}
list_add(&entry->init_list, &entries);
delta--;
}
list_splice(&entries, &pool->entry_list);
out:
card->qdio.in_buf_pool.buf_count = count;
pool->buf_count = count;
return 0;
}
EXPORT_SYMBOL_GPL(qeth_resize_buffer_pool);
static void qeth_free_qdio_queue(struct qeth_qdio_q *q)
{
if (!q)
return;
qdio_free_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
kfree(q);
}
static struct qeth_qdio_q *qeth_alloc_qdio_queue(void)
{
struct qeth_qdio_q *q = kzalloc(sizeof(*q), GFP_KERNEL);
int i;
if (!q)
return NULL;
if (qdio_alloc_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q)) {
kfree(q);
return NULL;
}
for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; ++i)
q->bufs[i].buffer = q->qdio_bufs[i];
QETH_DBF_HEX(SETUP, 2, &q, sizeof(void *));
return q;
}
static int qeth_cq_init(struct qeth_card *card)
{
int rc;
if (card->options.cq == QETH_CQ_ENABLED) {
QETH_CARD_TEXT(card, 2, "cqinit");
qdio_reset_buffers(card->qdio.c_q->qdio_bufs,
QDIO_MAX_BUFFERS_PER_Q);
card->qdio.c_q->next_buf_to_init = 127;
rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT,
card->qdio.no_in_queues - 1, 0,
127);
if (rc) {
QETH_CARD_TEXT_(card, 2, "1err%d", rc);
goto out;
}
}
rc = 0;
out:
return rc;
}
static int qeth_alloc_cq(struct qeth_card *card)
{
int rc;
if (card->options.cq == QETH_CQ_ENABLED) {
int i;
struct qdio_outbuf_state *outbuf_states;
QETH_CARD_TEXT(card, 2, "cqon");
card->qdio.c_q = qeth_alloc_qdio_queue();
if (!card->qdio.c_q) {
rc = -1;
goto kmsg_out;
}
card->qdio.no_in_queues = 2;
card->qdio.out_bufstates =
kcalloc(card->qdio.no_out_queues *
QDIO_MAX_BUFFERS_PER_Q,
sizeof(struct qdio_outbuf_state),
GFP_KERNEL);
outbuf_states = card->qdio.out_bufstates;
if (outbuf_states == NULL) {
rc = -1;
goto free_cq_out;
}
for (i = 0; i < card->qdio.no_out_queues; ++i) {
card->qdio.out_qs[i]->bufstates = outbuf_states;
outbuf_states += QDIO_MAX_BUFFERS_PER_Q;
}
} else {
QETH_CARD_TEXT(card, 2, "nocq");
card->qdio.c_q = NULL;
card->qdio.no_in_queues = 1;
}
QETH_CARD_TEXT_(card, 2, "iqc%d", card->qdio.no_in_queues);
rc = 0;
out:
return rc;
free_cq_out:
qeth_free_qdio_queue(card->qdio.c_q);
card->qdio.c_q = NULL;
kmsg_out:
dev_err(&card->gdev->dev, "Failed to create completion queue\n");
goto out;
}
static void qeth_free_cq(struct qeth_card *card)
{
if (card->qdio.c_q) {
--card->qdio.no_in_queues;
qeth_free_qdio_queue(card->qdio.c_q);
card->qdio.c_q = NULL;
}
kfree(card->qdio.out_bufstates);
card->qdio.out_bufstates = NULL;
}
static enum iucv_tx_notify qeth_compute_cq_notification(int sbalf15,
int delayed)
{
enum iucv_tx_notify n;
switch (sbalf15) {
case 0:
n = delayed ? TX_NOTIFY_DELAYED_OK : TX_NOTIFY_OK;
break;
case 4:
case 16:
case 17:
case 18:
n = delayed ? TX_NOTIFY_DELAYED_UNREACHABLE :
TX_NOTIFY_UNREACHABLE;
break;
default:
n = delayed ? TX_NOTIFY_DELAYED_GENERALERROR :
TX_NOTIFY_GENERALERROR;
break;
}
return n;
}
static void qeth_cleanup_handled_pending(struct qeth_qdio_out_q *q, int bidx,
int forced_cleanup)
{
if (q->card->options.cq != QETH_CQ_ENABLED)
return;
if (q->bufs[bidx]->next_pending != NULL) {
struct qeth_qdio_out_buffer *head = q->bufs[bidx];
struct qeth_qdio_out_buffer *c = q->bufs[bidx]->next_pending;
while (c) {
if (forced_cleanup ||
atomic_read(&c->state) ==
QETH_QDIO_BUF_HANDLED_DELAYED) {
struct qeth_qdio_out_buffer *f = c;
QETH_CARD_TEXT(f->q->card, 5, "fp");
QETH_CARD_TEXT_(f->q->card, 5, "%lx", (long) f);
/* release here to avoid interleaving between
outbound tasklet and inbound tasklet
regarding notifications and lifecycle */
qeth_tx_complete_buf(c, forced_cleanup, 0);
c = f->next_pending;
WARN_ON_ONCE(head->next_pending != f);
head->next_pending = c;
kmem_cache_free(qeth_qdio_outbuf_cache, f);
} else {
head = c;
c = c->next_pending;
}
}
}
if (forced_cleanup && (atomic_read(&(q->bufs[bidx]->state)) ==
QETH_QDIO_BUF_HANDLED_DELAYED)) {
/* for recovery situations */
qeth_init_qdio_out_buf(q, bidx);
QETH_CARD_TEXT(q->card, 2, "clprecov");
}
}
static void qeth_qdio_handle_aob(struct qeth_card *card,
unsigned long phys_aob_addr)
{
struct qaob *aob;
struct qeth_qdio_out_buffer *buffer;
enum iucv_tx_notify notification;
unsigned int i;
aob = (struct qaob *) phys_to_virt(phys_aob_addr);
QETH_CARD_TEXT(card, 5, "haob");
QETH_CARD_TEXT_(card, 5, "%lx", phys_aob_addr);
buffer = (struct qeth_qdio_out_buffer *) aob->user1;
QETH_CARD_TEXT_(card, 5, "%lx", aob->user1);
if (atomic_cmpxchg(&buffer->state, QETH_QDIO_BUF_PRIMED,
QETH_QDIO_BUF_IN_CQ) == QETH_QDIO_BUF_PRIMED) {
notification = TX_NOTIFY_OK;
} else {
WARN_ON_ONCE(atomic_read(&buffer->state) !=
QETH_QDIO_BUF_PENDING);
atomic_set(&buffer->state, QETH_QDIO_BUF_IN_CQ);
notification = TX_NOTIFY_DELAYED_OK;
}
if (aob->aorc != 0) {
QETH_CARD_TEXT_(card, 2, "aorc%02X", aob->aorc);
notification = qeth_compute_cq_notification(aob->aorc, 1);
}
qeth_notify_skbs(buffer->q, buffer, notification);
/* Free dangling allocations. The attached skbs are handled by
* qeth_cleanup_handled_pending().
*/
for (i = 0;
i < aob->sb_count && i < QETH_MAX_BUFFER_ELEMENTS(card);
i++) {
void *data = phys_to_virt(aob->sba[i]);
if (data && buffer->is_header[i])
kmem_cache_free(qeth_core_header_cache, data);
}
atomic_set(&buffer->state, QETH_QDIO_BUF_HANDLED_DELAYED);
qdio_release_aob(aob);
}
static void qeth_setup_ccw(struct ccw1 *ccw, u8 cmd_code, u8 flags, u32 len,
void *data)
{
ccw->cmd_code = cmd_code;
ccw->flags = flags | CCW_FLAG_SLI;
ccw->count = len;
ccw->cda = (__u32) __pa(data);
}
static int __qeth_issue_next_read(struct qeth_card *card)
{
struct qeth_cmd_buffer *iob = card->read_cmd;
struct qeth_channel *channel = iob->channel;
struct ccw1 *ccw = __ccw_from_cmd(iob);
int rc;
QETH_CARD_TEXT(card, 5, "issnxrd");
if (channel->state != CH_STATE_UP)
return -EIO;
memset(iob->data, 0, iob->length);
qeth_setup_ccw(ccw, CCW_CMD_READ, 0, iob->length, iob->data);
iob->callback = qeth_issue_next_read_cb;
/* keep the cmd alive after completion: */
qeth_get_cmd(iob);
QETH_CARD_TEXT(card, 6, "noirqpnd");
rc = ccw_device_start(channel->ccwdev, ccw, (addr_t) iob, 0, 0);
if (!rc) {
channel->active_cmd = iob;
} else {
QETH_DBF_MESSAGE(2, "error %i on device %x when starting next read ccw!\n",
rc, CARD_DEVID(card));
qeth_unlock_channel(card, channel);
qeth_put_cmd(iob);
card->read_or_write_problem = 1;
qeth_schedule_recovery(card);
}
return rc;
}
static int qeth_issue_next_read(struct qeth_card *card)
{
int ret;
spin_lock_irq(get_ccwdev_lock(CARD_RDEV(card)));
ret = __qeth_issue_next_read(card);
spin_unlock_irq(get_ccwdev_lock(CARD_RDEV(card)));
return ret;
}
static void qeth_enqueue_cmd(struct qeth_card *card,
struct qeth_cmd_buffer *iob)
{
spin_lock_irq(&card->lock);
list_add_tail(&iob->list, &card->cmd_waiter_list);
spin_unlock_irq(&card->lock);
}
static void qeth_dequeue_cmd(struct qeth_card *card,
struct qeth_cmd_buffer *iob)
{
spin_lock_irq(&card->lock);
list_del(&iob->list);
spin_unlock_irq(&card->lock);
}
void qeth_notify_cmd(struct qeth_cmd_buffer *iob, int reason)
{
iob->rc = reason;
complete(&iob->done);
}
EXPORT_SYMBOL_GPL(qeth_notify_cmd);
static void qeth_flush_local_addrs4(struct qeth_card *card)
{
struct qeth_local_addr *addr;
struct hlist_node *tmp;
unsigned int i;
spin_lock_irq(&card->local_addrs4_lock);
hash_for_each_safe(card->local_addrs4, i, tmp, addr, hnode) {
hash_del_rcu(&addr->hnode);
kfree_rcu(addr, rcu);
}
spin_unlock_irq(&card->local_addrs4_lock);
}
static void qeth_flush_local_addrs6(struct qeth_card *card)
{
struct qeth_local_addr *addr;
struct hlist_node *tmp;
unsigned int i;
spin_lock_irq(&card->local_addrs6_lock);
hash_for_each_safe(card->local_addrs6, i, tmp, addr, hnode) {
hash_del_rcu(&addr->hnode);
kfree_rcu(addr, rcu);
}
spin_unlock_irq(&card->local_addrs6_lock);
}
void qeth_flush_local_addrs(struct qeth_card *card)
{
qeth_flush_local_addrs4(card);
qeth_flush_local_addrs6(card);
}
EXPORT_SYMBOL_GPL(qeth_flush_local_addrs);
static void qeth_add_local_addrs4(struct qeth_card *card,
struct qeth_ipacmd_local_addrs4 *cmd)
{
unsigned int i;
if (cmd->addr_length !=
sizeof_field(struct qeth_ipacmd_local_addr4, addr)) {
dev_err_ratelimited(&card->gdev->dev,
"Dropped IPv4 ADD LOCAL ADDR event with bad length %u\n",
cmd->addr_length);
return;
}
spin_lock(&card->local_addrs4_lock);
for (i = 0; i < cmd->count; i++) {
unsigned int key = ipv4_addr_hash(cmd->addrs[i].addr);
struct qeth_local_addr *addr;
bool duplicate = false;
hash_for_each_possible(card->local_addrs4, addr, hnode, key) {
if (addr->addr.s6_addr32[3] == cmd->addrs[i].addr) {
duplicate = true;
break;
}
}
if (duplicate)
continue;
addr = kmalloc(sizeof(*addr), GFP_ATOMIC);
if (!addr) {
dev_err(&card->gdev->dev,
"Failed to allocate local addr object. Traffic to %pI4 might suffer.\n",
&cmd->addrs[i].addr);
continue;
}
ipv6_addr_set(&addr->addr, 0, 0, 0, cmd->addrs[i].addr);
hash_add_rcu(card->local_addrs4, &addr->hnode, key);
}
spin_unlock(&card->local_addrs4_lock);
}
static void qeth_add_local_addrs6(struct qeth_card *card,
struct qeth_ipacmd_local_addrs6 *cmd)
{
unsigned int i;
if (cmd->addr_length !=
sizeof_field(struct qeth_ipacmd_local_addr6, addr)) {
dev_err_ratelimited(&card->gdev->dev,
"Dropped IPv6 ADD LOCAL ADDR event with bad length %u\n",
cmd->addr_length);
return;
}
spin_lock(&card->local_addrs6_lock);
for (i = 0; i < cmd->count; i++) {
u32 key = ipv6_addr_hash(&cmd->addrs[i].addr);
struct qeth_local_addr *addr;
bool duplicate = false;
hash_for_each_possible(card->local_addrs6, addr, hnode, key) {
if (ipv6_addr_equal(&addr->addr, &cmd->addrs[i].addr)) {
duplicate = true;
break;
}
}
if (duplicate)
continue;
addr = kmalloc(sizeof(*addr), GFP_ATOMIC);
if (!addr) {
dev_err(&card->gdev->dev,
"Failed to allocate local addr object. Traffic to %pI6c might suffer.\n",
&cmd->addrs[i].addr);
continue;
}
addr->addr = cmd->addrs[i].addr;
hash_add_rcu(card->local_addrs6, &addr->hnode, key);
}
spin_unlock(&card->local_addrs6_lock);
}
static void qeth_del_local_addrs4(struct qeth_card *card,
struct qeth_ipacmd_local_addrs4 *cmd)
{
unsigned int i;
if (cmd->addr_length !=
sizeof_field(struct qeth_ipacmd_local_addr4, addr)) {
dev_err_ratelimited(&card->gdev->dev,
"Dropped IPv4 DEL LOCAL ADDR event with bad length %u\n",
cmd->addr_length);
return;
}
spin_lock(&card->local_addrs4_lock);
for (i = 0; i < cmd->count; i++) {
struct qeth_ipacmd_local_addr4 *addr = &cmd->addrs[i];
unsigned int key = ipv4_addr_hash(addr->addr);
struct qeth_local_addr *tmp;
hash_for_each_possible(card->local_addrs4, tmp, hnode, key) {
if (tmp->addr.s6_addr32[3] == addr->addr) {
hash_del_rcu(&tmp->hnode);
kfree_rcu(tmp, rcu);
break;
}
}
}
spin_unlock(&card->local_addrs4_lock);
}
static void qeth_del_local_addrs6(struct qeth_card *card,
struct qeth_ipacmd_local_addrs6 *cmd)
{
unsigned int i;
if (cmd->addr_length !=
sizeof_field(struct qeth_ipacmd_local_addr6, addr)) {
dev_err_ratelimited(&card->gdev->dev,
"Dropped IPv6 DEL LOCAL ADDR event with bad length %u\n",
cmd->addr_length);
return;
}
spin_lock(&card->local_addrs6_lock);
for (i = 0; i < cmd->count; i++) {
struct qeth_ipacmd_local_addr6 *addr = &cmd->addrs[i];
u32 key = ipv6_addr_hash(&addr->addr);
struct qeth_local_addr *tmp;
hash_for_each_possible(card->local_addrs6, tmp, hnode, key) {
if (ipv6_addr_equal(&tmp->addr, &addr->addr)) {
hash_del_rcu(&tmp->hnode);
kfree_rcu(tmp, rcu);
break;
}
}
}
spin_unlock(&card->local_addrs6_lock);
}
static bool qeth_next_hop_is_local_v4(struct qeth_card *card,
struct sk_buff *skb)
{
struct qeth_local_addr *tmp;
bool is_local = false;
unsigned int key;
__be32 next_hop;
if (hash_empty(card->local_addrs4))
return false;
rcu_read_lock();
next_hop = qeth_next_hop_v4_rcu(skb, qeth_dst_check_rcu(skb, 4));
key = ipv4_addr_hash(next_hop);
hash_for_each_possible_rcu(card->local_addrs4, tmp, hnode, key) {
if (tmp->addr.s6_addr32[3] == next_hop) {
is_local = true;
break;
}
}
rcu_read_unlock();
return is_local;
}
static bool qeth_next_hop_is_local_v6(struct qeth_card *card,
struct sk_buff *skb)
{
struct qeth_local_addr *tmp;
struct in6_addr *next_hop;
bool is_local = false;
u32 key;
if (hash_empty(card->local_addrs6))
return false;
rcu_read_lock();
next_hop = qeth_next_hop_v6_rcu(skb, qeth_dst_check_rcu(skb, 6));
key = ipv6_addr_hash(next_hop);
hash_for_each_possible_rcu(card->local_addrs6, tmp, hnode, key) {
if (ipv6_addr_equal(&tmp->addr, next_hop)) {
is_local = true;
break;
}
}
rcu_read_unlock();
return is_local;
}
static int qeth_debugfs_local_addr_show(struct seq_file *m, void *v)
{
struct qeth_card *card = m->private;
struct qeth_local_addr *tmp;
unsigned int i;
rcu_read_lock();
hash_for_each_rcu(card->local_addrs4, i, tmp, hnode)
seq_printf(m, "%pI4\n", &tmp->addr.s6_addr32[3]);
hash_for_each_rcu(card->local_addrs6, i, tmp, hnode)
seq_printf(m, "%pI6c\n", &tmp->addr);
rcu_read_unlock();
return 0;
}
DEFINE_SHOW_ATTRIBUTE(qeth_debugfs_local_addr);
static void qeth_issue_ipa_msg(struct qeth_ipa_cmd *cmd, int rc,
struct qeth_card *card)
{
const char *ipa_name;
int com = cmd->hdr.command;
ipa_name = qeth_get_ipa_cmd_name(com);
if (rc)
QETH_DBF_MESSAGE(2, "IPA: %s(%#x) for device %x returned %#x \"%s\"\n",
ipa_name, com, CARD_DEVID(card), rc,
qeth_get_ipa_msg(rc));
else
QETH_DBF_MESSAGE(5, "IPA: %s(%#x) for device %x succeeded\n",
ipa_name, com, CARD_DEVID(card));
}
static struct qeth_ipa_cmd *qeth_check_ipa_data(struct qeth_card *card,
struct qeth_ipa_cmd *cmd)
{
QETH_CARD_TEXT(card, 5, "chkipad");
if (IS_IPA_REPLY(cmd)) {
if (cmd->hdr.command != IPA_CMD_SETCCID &&
cmd->hdr.command != IPA_CMD_DELCCID &&
cmd->hdr.command != IPA_CMD_MODCCID &&
cmd->hdr.command != IPA_CMD_SET_DIAG_ASS)
qeth_issue_ipa_msg(cmd, cmd->hdr.return_code, card);
return cmd;
}
/* handle unsolicited event: */
switch (cmd->hdr.command) {
case IPA_CMD_STOPLAN:
if (cmd->hdr.return_code == IPA_RC_VEPA_TO_VEB_TRANSITION) {
dev_err(&card->gdev->dev,
"Interface %s is down because the adjacent port is no longer in reflective relay mode\n",
QETH_CARD_IFNAME(card));
schedule_work(&card->close_dev_work);
} else {
dev_warn(&card->gdev->dev,
"The link for interface %s on CHPID 0x%X failed\n",
QETH_CARD_IFNAME(card), card->info.chpid);
qeth_issue_ipa_msg(cmd, cmd->hdr.return_code, card);
netif_carrier_off(card->dev);
}
return NULL;
case IPA_CMD_STARTLAN:
dev_info(&card->gdev->dev,
"The link for %s on CHPID 0x%X has been restored\n",
QETH_CARD_IFNAME(card), card->info.chpid);
if (card->info.hwtrap)
card->info.hwtrap = 2;
qeth_schedule_recovery(card);
return NULL;
case IPA_CMD_SETBRIDGEPORT_IQD:
case IPA_CMD_SETBRIDGEPORT_OSA:
case IPA_CMD_ADDRESS_CHANGE_NOTIF:
if (card->discipline->control_event_handler(card, cmd))
return cmd;
return NULL;
case IPA_CMD_MODCCID:
return cmd;
case IPA_CMD_REGISTER_LOCAL_ADDR:
if (cmd->hdr.prot_version == QETH_PROT_IPV4)
qeth_add_local_addrs4(card, &cmd->data.local_addrs4);
else if (cmd->hdr.prot_version == QETH_PROT_IPV6)
qeth_add_local_addrs6(card, &cmd->data.local_addrs6);
QETH_CARD_TEXT(card, 3, "irla");
return NULL;
case IPA_CMD_UNREGISTER_LOCAL_ADDR:
if (cmd->hdr.prot_version == QETH_PROT_IPV4)
qeth_del_local_addrs4(card, &cmd->data.local_addrs4);
else if (cmd->hdr.prot_version == QETH_PROT_IPV6)
qeth_del_local_addrs6(card, &cmd->data.local_addrs6);
QETH_CARD_TEXT(card, 3, "urla");
return NULL;
default:
QETH_DBF_MESSAGE(2, "Received data is IPA but not a reply!\n");
return cmd;
}
}
void qeth_clear_ipacmd_list(struct qeth_card *card)
{
struct qeth_cmd_buffer *iob;
unsigned long flags;
QETH_CARD_TEXT(card, 4, "clipalst");
spin_lock_irqsave(&card->lock, flags);
list_for_each_entry(iob, &card->cmd_waiter_list, list)
qeth_notify_cmd(iob, -EIO);
spin_unlock_irqrestore(&card->lock, flags);
}
EXPORT_SYMBOL_GPL(qeth_clear_ipacmd_list);
static int qeth_check_idx_response(struct qeth_card *card,
unsigned char *buffer)
{
QETH_DBF_HEX(CTRL, 2, buffer, QETH_DBF_CTRL_LEN);
if ((buffer[2] & QETH_IDX_TERMINATE_MASK) == QETH_IDX_TERMINATE) {
QETH_DBF_MESSAGE(2, "received an IDX TERMINATE with cause code %#04x\n",
buffer[4]);
QETH_CARD_TEXT(card, 2, "ckidxres");
QETH_CARD_TEXT(card, 2, " idxterm");
QETH_CARD_TEXT_(card, 2, "rc%x", buffer[4]);
if (buffer[4] == QETH_IDX_TERM_BAD_TRANSPORT ||
buffer[4] == QETH_IDX_TERM_BAD_TRANSPORT_VM) {
dev_err(&card->gdev->dev,
"The device does not support the configured transport mode\n");
return -EPROTONOSUPPORT;
}
return -EIO;
}
return 0;
}
void qeth_put_cmd(struct qeth_cmd_buffer *iob)
{
if (refcount_dec_and_test(&iob->ref_count)) {
kfree(iob->data);
kfree(iob);
}
}
EXPORT_SYMBOL_GPL(qeth_put_cmd);
static void qeth_release_buffer_cb(struct qeth_card *card,
struct qeth_cmd_buffer *iob,
unsigned int data_length)
{
qeth_put_cmd(iob);
}
static void qeth_cancel_cmd(struct qeth_cmd_buffer *iob, int rc)
{
qeth_notify_cmd(iob, rc);
qeth_put_cmd(iob);
}
struct qeth_cmd_buffer *qeth_alloc_cmd(struct qeth_channel *channel,
unsigned int length, unsigned int ccws,
long timeout)
{
struct qeth_cmd_buffer *iob;
if (length > QETH_BUFSIZE)
return NULL;
iob = kzalloc(sizeof(*iob), GFP_KERNEL);
if (!iob)
return NULL;
iob->data = kzalloc(ALIGN(length, 8) + ccws * sizeof(struct ccw1),
GFP_KERNEL | GFP_DMA);
if (!iob->data) {
kfree(iob);
return NULL;
}
init_completion(&iob->done);
spin_lock_init(&iob->lock);
INIT_LIST_HEAD(&iob->list);
refcount_set(&iob->ref_count, 1);
iob->channel = channel;
iob->timeout = timeout;
iob->length = length;
return iob;
}
EXPORT_SYMBOL_GPL(qeth_alloc_cmd);
static void qeth_issue_next_read_cb(struct qeth_card *card,
struct qeth_cmd_buffer *iob,
unsigned int data_length)
{
struct qeth_cmd_buffer *request = NULL;
struct qeth_ipa_cmd *cmd = NULL;
struct qeth_reply *reply = NULL;
struct qeth_cmd_buffer *tmp;
unsigned long flags;
int rc = 0;
QETH_CARD_TEXT(card, 4, "sndctlcb");
rc = qeth_check_idx_response(card, iob->data);
switch (rc) {
case 0:
break;
case -EIO:
qeth_schedule_recovery(card);
/* fall through */
default:
qeth_clear_ipacmd_list(card);
goto err_idx;
}
cmd = __ipa_reply(iob);
if (cmd) {
cmd = qeth_check_ipa_data(card, cmd);
if (!cmd)
goto out;
if (IS_OSN(card) && card->osn_info.assist_cb &&
cmd->hdr.command != IPA_CMD_STARTLAN) {
card->osn_info.assist_cb(card->dev, cmd);
goto out;
}
}
/* match against pending cmd requests */
spin_lock_irqsave(&card->lock, flags);
list_for_each_entry(tmp, &card->cmd_waiter_list, list) {
if (tmp->match && tmp->match(tmp, iob)) {
request = tmp;
/* take the object outside the lock */
qeth_get_cmd(request);
break;
}
}
spin_unlock_irqrestore(&card->lock, flags);
if (!request)
goto out;
reply = &request->reply;
if (!reply->callback) {
rc = 0;
goto no_callback;
}
spin_lock_irqsave(&request->lock, flags);
if (request->rc)
/* Bail out when the requestor has already left: */
rc = request->rc;
else
rc = reply->callback(card, reply, cmd ? (unsigned long)cmd :
(unsigned long)iob);
spin_unlock_irqrestore(&request->lock, flags);
no_callback:
if (rc <= 0)
qeth_notify_cmd(request, rc);
qeth_put_cmd(request);
out:
memcpy(&card->seqno.pdu_hdr_ack,
QETH_PDU_HEADER_SEQ_NO(iob->data),
QETH_SEQ_NO_LENGTH);
__qeth_issue_next_read(card);
err_idx:
qeth_put_cmd(iob);
}
static int qeth_set_thread_start_bit(struct qeth_card *card,
unsigned long thread)
{
unsigned long flags;
int rc = 0;
spin_lock_irqsave(&card->thread_mask_lock, flags);
if (!(card->thread_allowed_mask & thread))
rc = -EPERM;
else if (card->thread_start_mask & thread)
rc = -EBUSY;
else
card->thread_start_mask |= thread;
spin_unlock_irqrestore(&card->thread_mask_lock, flags);
return rc;
}
static void qeth_clear_thread_start_bit(struct qeth_card *card,
unsigned long thread)
{
unsigned long flags;
spin_lock_irqsave(&card->thread_mask_lock, flags);
card->thread_start_mask &= ~thread;
spin_unlock_irqrestore(&card->thread_mask_lock, flags);
wake_up(&card->wait_q);
}
static void qeth_clear_thread_running_bit(struct qeth_card *card,
unsigned long thread)
{
unsigned long flags;
spin_lock_irqsave(&card->thread_mask_lock, flags);
card->thread_running_mask &= ~thread;
spin_unlock_irqrestore(&card->thread_mask_lock, flags);
wake_up_all(&card->wait_q);
}
static int __qeth_do_run_thread(struct qeth_card *card, unsigned long thread)
{
unsigned long flags;
int rc = 0;
spin_lock_irqsave(&card->thread_mask_lock, flags);
if (card->thread_start_mask & thread) {
if ((card->thread_allowed_mask & thread) &&
!(card->thread_running_mask & thread)) {
rc = 1;
card->thread_start_mask &= ~thread;
card->thread_running_mask |= thread;
} else
rc = -EPERM;
}
spin_unlock_irqrestore(&card->thread_mask_lock, flags);
return rc;
}
static int qeth_do_run_thread(struct qeth_card *card, unsigned long thread)
{
int rc = 0;
wait_event(card->wait_q,
(rc = __qeth_do_run_thread(card, thread)) >= 0);
return rc;
}
int qeth_schedule_recovery(struct qeth_card *card)
{
int rc;
QETH_CARD_TEXT(card, 2, "startrec");
rc = qeth_set_thread_start_bit(card, QETH_RECOVER_THREAD);
if (!rc)
schedule_work(&card->kernel_thread_starter);
return rc;
}
static int qeth_get_problem(struct qeth_card *card, struct ccw_device *cdev,
struct irb *irb)
{
int dstat, cstat;
char *sense;
sense = (char *) irb->ecw;
cstat = irb->scsw.cmd.cstat;
dstat = irb->scsw.cmd.dstat;
if (cstat & (SCHN_STAT_CHN_CTRL_CHK | SCHN_STAT_INTF_CTRL_CHK |
SCHN_STAT_CHN_DATA_CHK | SCHN_STAT_CHAIN_CHECK |
SCHN_STAT_PROT_CHECK | SCHN_STAT_PROG_CHECK)) {
QETH_CARD_TEXT(card, 2, "CGENCHK");
dev_warn(&cdev->dev, "The qeth device driver "
"failed to recover an error on the device\n");
QETH_DBF_MESSAGE(2, "check on channel %x with dstat=%#x, cstat=%#x\n",
CCW_DEVID(cdev), dstat, cstat);
print_hex_dump(KERN_WARNING, "qeth: irb ", DUMP_PREFIX_OFFSET,
16, 1, irb, 64, 1);
return -EIO;
}
if (dstat & DEV_STAT_UNIT_CHECK) {
if (sense[SENSE_RESETTING_EVENT_BYTE] &
SENSE_RESETTING_EVENT_FLAG) {
QETH_CARD_TEXT(card, 2, "REVIND");
return -EIO;
}
if (sense[SENSE_COMMAND_REJECT_BYTE] &
SENSE_COMMAND_REJECT_FLAG) {
QETH_CARD_TEXT(card, 2, "CMDREJi");
return -EIO;
}
if ((sense[2] == 0xaf) && (sense[3] == 0xfe)) {
QETH_CARD_TEXT(card, 2, "AFFE");
return -EIO;
}
if ((!sense[0]) && (!sense[1]) && (!sense[2]) && (!sense[3])) {
QETH_CARD_TEXT(card, 2, "ZEROSEN");
return 0;
}
QETH_CARD_TEXT(card, 2, "DGENCHK");
return -EIO;
}
return 0;
}
static int qeth_check_irb_error(struct qeth_card *card, struct ccw_device *cdev,
struct irb *irb)
{
if (!IS_ERR(irb))
return 0;
switch (PTR_ERR(irb)) {
case -EIO:
QETH_DBF_MESSAGE(2, "i/o-error on channel %x\n",
CCW_DEVID(cdev));
QETH_CARD_TEXT(card, 2, "ckirberr");
QETH_CARD_TEXT_(card, 2, " rc%d", -EIO);
return -EIO;
case -ETIMEDOUT:
dev_warn(&cdev->dev, "A hardware operation timed out"
" on the device\n");
QETH_CARD_TEXT(card, 2, "ckirberr");
QETH_CARD_TEXT_(card, 2, " rc%d", -ETIMEDOUT);
return -ETIMEDOUT;
default:
QETH_DBF_MESSAGE(2, "unknown error %ld on channel %x\n",
PTR_ERR(irb), CCW_DEVID(cdev));
QETH_CARD_TEXT(card, 2, "ckirberr");
QETH_CARD_TEXT(card, 2, " rc???");
return PTR_ERR(irb);
}
}
static void qeth_irq(struct ccw_device *cdev, unsigned long intparm,
struct irb *irb)
{
int rc;
int cstat, dstat;
struct qeth_cmd_buffer *iob = NULL;
struct ccwgroup_device *gdev;
struct qeth_channel *channel;
struct qeth_card *card;
/* while we hold the ccwdev lock, this stays valid: */
gdev = dev_get_drvdata(&cdev->dev);
card = dev_get_drvdata(&gdev->dev);
QETH_CARD_TEXT(card, 5, "irq");
if (card->read.ccwdev == cdev) {
channel = &card->read;
QETH_CARD_TEXT(card, 5, "read");
} else if (card->write.ccwdev == cdev) {
channel = &card->write;
QETH_CARD_TEXT(card, 5, "write");
} else {
channel = &card->data;
QETH_CARD_TEXT(card, 5, "data");
}
if (intparm == 0) {
QETH_CARD_TEXT(card, 5, "irqunsol");
} else if ((addr_t)intparm != (addr_t)channel->active_cmd) {
QETH_CARD_TEXT(card, 5, "irqunexp");
dev_err(&cdev->dev,
"Received IRQ with intparm %lx, expected %px\n",
intparm, channel->active_cmd);
if (channel->active_cmd)
qeth_cancel_cmd(channel->active_cmd, -EIO);
} else {
iob = (struct qeth_cmd_buffer *) (addr_t)intparm;
}
channel->active_cmd = NULL;
qeth_unlock_channel(card, channel);
rc = qeth_check_irb_error(card, cdev, irb);
if (rc) {
/* IO was terminated, free its resources. */
if (iob)
qeth_cancel_cmd(iob, rc);
return;
}
if (irb->scsw.cmd.fctl & SCSW_FCTL_CLEAR_FUNC) {
channel->state = CH_STATE_STOPPED;
wake_up(&card->wait_q);
}
if (irb->scsw.cmd.fctl & SCSW_FCTL_HALT_FUNC) {
channel->state = CH_STATE_HALTED;
wake_up(&card->wait_q);
}
if (iob && (irb->scsw.cmd.fctl & (SCSW_FCTL_CLEAR_FUNC |
SCSW_FCTL_HALT_FUNC))) {
qeth_cancel_cmd(iob, -ECANCELED);
iob = NULL;
}
cstat = irb->scsw.cmd.cstat;
dstat = irb->scsw.cmd.dstat;
if ((dstat & DEV_STAT_UNIT_EXCEP) ||
(dstat & DEV_STAT_UNIT_CHECK) ||
(cstat)) {
if (irb->esw.esw0.erw.cons) {
dev_warn(&channel->ccwdev->dev,
"The qeth device driver failed to recover "
"an error on the device\n");
QETH_DBF_MESSAGE(2, "sense data available on channel %x: cstat %#X dstat %#X\n",
CCW_DEVID(channel->ccwdev), cstat,
dstat);
print_hex_dump(KERN_WARNING, "qeth: irb ",
DUMP_PREFIX_OFFSET, 16, 1, irb, 32, 1);
print_hex_dump(KERN_WARNING, "qeth: sense data ",
DUMP_PREFIX_OFFSET, 16, 1, irb->ecw, 32, 1);
}
rc = qeth_get_problem(card, cdev, irb);
if (rc) {
card->read_or_write_problem = 1;
if (iob)
qeth_cancel_cmd(iob, rc);
qeth_clear_ipacmd_list(card);
qeth_schedule_recovery(card);
return;
}
}
if (iob) {
/* sanity check: */
if (irb->scsw.cmd.count > iob->length) {
qeth_cancel_cmd(iob, -EIO);
return;
}
if (iob->callback)
iob->callback(card, iob,
iob->length - irb->scsw.cmd.count);
}
}
static void qeth_notify_skbs(struct qeth_qdio_out_q *q,
struct qeth_qdio_out_buffer *buf,
enum iucv_tx_notify notification)
{
struct sk_buff *skb;
skb_queue_walk(&buf->skb_list, skb) {
QETH_CARD_TEXT_(q->card, 5, "skbn%d", notification);
QETH_CARD_TEXT_(q->card, 5, "%lx", (long) skb);
if (skb->protocol == htons(ETH_P_AF_IUCV) && skb->sk)
iucv_sk(skb->sk)->sk_txnotify(skb, notification);
}
}
static void qeth_tx_complete_buf(struct qeth_qdio_out_buffer *buf, bool error,
int budget)
{
struct qeth_qdio_out_q *queue = buf->q;
struct sk_buff *skb;
/* release may never happen from within CQ tasklet scope */
WARN_ON_ONCE(atomic_read(&buf->state) == QETH_QDIO_BUF_IN_CQ);
if (atomic_read(&buf->state) == QETH_QDIO_BUF_PENDING)
qeth_notify_skbs(queue, buf, TX_NOTIFY_GENERALERROR);
/* Empty buffer? */
if (buf->next_element_to_fill == 0)
return;
QETH_TXQ_STAT_INC(queue, bufs);
QETH_TXQ_STAT_ADD(queue, buf_elements, buf->next_element_to_fill);
if (error) {
QETH_TXQ_STAT_ADD(queue, tx_errors, buf->frames);
} else {
QETH_TXQ_STAT_ADD(queue, tx_packets, buf->frames);
QETH_TXQ_STAT_ADD(queue, tx_bytes, buf->bytes);
}
while ((skb = __skb_dequeue(&buf->skb_list)) != NULL) {
unsigned int bytes = qdisc_pkt_len(skb);
bool is_tso = skb_is_gso(skb);
unsigned int packets;
packets = is_tso ? skb_shinfo(skb)->gso_segs : 1;
if (!error) {
if (skb->ip_summed == CHECKSUM_PARTIAL)
QETH_TXQ_STAT_ADD(queue, skbs_csum, packets);
if (skb_is_nonlinear(skb))
QETH_TXQ_STAT_INC(queue, skbs_sg);
if (is_tso) {
QETH_TXQ_STAT_INC(queue, skbs_tso);
QETH_TXQ_STAT_ADD(queue, tso_bytes, bytes);
}
}
napi_consume_skb(skb, budget);
}
}
static void qeth_clear_output_buffer(struct qeth_qdio_out_q *queue,
struct qeth_qdio_out_buffer *buf,
bool error, int budget)
{
int i;
/* is PCI flag set on buffer? */
if (buf->buffer->element[0].sflags & SBAL_SFLAGS0_PCI_REQ)
atomic_dec(&queue->set_pci_flags_count);
qeth_tx_complete_buf(buf, error, budget);
for (i = 0; i < queue->max_elements; ++i) {
void *data = phys_to_virt(buf->buffer->element[i].addr);
if (data && buf->is_header[i])
kmem_cache_free(qeth_core_header_cache, data);
buf->is_header[i] = 0;
}
qeth_scrub_qdio_buffer(buf->buffer, queue->max_elements);
buf->next_element_to_fill = 0;
buf->frames = 0;
buf->bytes = 0;
atomic_set(&buf->state, QETH_QDIO_BUF_EMPTY);
}
static void qeth_drain_output_queue(struct qeth_qdio_out_q *q, bool free)
{
int j;
for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
if (!q->bufs[j])
continue;
qeth_cleanup_handled_pending(q, j, 1);
qeth_clear_output_buffer(q, q->bufs[j], true, 0);
if (free) {
kmem_cache_free(qeth_qdio_outbuf_cache, q->bufs[j]);
q->bufs[j] = NULL;
}
}
}
void qeth_drain_output_queues(struct qeth_card *card)
{
int i;
QETH_CARD_TEXT(card, 2, "clearqdbf");
/* clear outbound buffers to free skbs */
for (i = 0; i < card->qdio.no_out_queues; ++i) {
if (card->qdio.out_qs[i])
qeth_drain_output_queue(card->qdio.out_qs[i], false);
}
}
EXPORT_SYMBOL_GPL(qeth_drain_output_queues);
static int qeth_osa_set_output_queues(struct qeth_card *card, bool single)
{
unsigned int max = single ? 1 : card->dev->num_tx_queues;
unsigned int count;
int rc;
count = IS_VM_NIC(card) ? min(max, card->dev->real_num_tx_queues) : max;
rtnl_lock();
rc = netif_set_real_num_tx_queues(card->dev, count);
rtnl_unlock();
if (rc)
return rc;
if (card->qdio.no_out_queues == max)
return 0;
if (atomic_read(&card->qdio.state) != QETH_QDIO_UNINITIALIZED)
qeth_free_qdio_queues(card);
if (max == 1 && card->qdio.do_prio_queueing != QETH_PRIOQ_DEFAULT)
dev_info(&card->gdev->dev, "Priority Queueing not supported\n");
card->qdio.no_out_queues = max;
return 0;
}
static int qeth_update_from_chp_desc(struct qeth_card *card)
{
struct ccw_device *ccwdev;
struct channel_path_desc_fmt0 *chp_dsc;
int rc = 0;
QETH_CARD_TEXT(card, 2, "chp_desc");
ccwdev = card->data.ccwdev;
chp_dsc = ccw_device_get_chp_desc(ccwdev, 0);
if (!chp_dsc)
return -ENOMEM;
card->info.func_level = 0x4100 + chp_dsc->desc;
if (IS_OSD(card) || IS_OSX(card))
/* CHPP field bit 6 == 1 -> single queue */
rc = qeth_osa_set_output_queues(card, chp_dsc->chpp & 0x02);
kfree(chp_dsc);
QETH_CARD_TEXT_(card, 2, "nr:%x", card->qdio.no_out_queues);
QETH_CARD_TEXT_(card, 2, "lvl:%02x", card->info.func_level);
return rc;
}
static void qeth_init_qdio_info(struct qeth_card *card)
{
QETH_CARD_TEXT(card, 4, "intqdinf");
atomic_set(&card->qdio.state, QETH_QDIO_UNINITIALIZED);
card->qdio.do_prio_queueing = QETH_PRIOQ_DEFAULT;
card->qdio.default_out_queue = QETH_DEFAULT_QUEUE;
/* inbound */
card->qdio.no_in_queues = 1;
card->qdio.in_buf_size = QETH_IN_BUF_SIZE_DEFAULT;
if (IS_IQD(card))
card->qdio.init_pool.buf_count = QETH_IN_BUF_COUNT_HSDEFAULT;
else
card->qdio.init_pool.buf_count = QETH_IN_BUF_COUNT_DEFAULT;
card->qdio.in_buf_pool.buf_count = card->qdio.init_pool.buf_count;
INIT_LIST_HEAD(&card->qdio.in_buf_pool.entry_list);
INIT_LIST_HEAD(&card->qdio.init_pool.entry_list);
}
static void qeth_set_initial_options(struct qeth_card *card)
{
card->options.route4.type = NO_ROUTER;
card->options.route6.type = NO_ROUTER;
card->options.isolation = ISOLATION_MODE_NONE;
card->options.cq = QETH_CQ_DISABLED;
card->options.layer = QETH_DISCIPLINE_UNDETERMINED;
}
static int qeth_do_start_thread(struct qeth_card *card, unsigned long thread)
{
unsigned long flags;
int rc = 0;
spin_lock_irqsave(&card->thread_mask_lock, flags);
QETH_CARD_TEXT_(card, 4, " %02x%02x%02x",
(u8) card->thread_start_mask,
(u8) card->thread_allowed_mask,
(u8) card->thread_running_mask);
rc = (card->thread_start_mask & thread);
spin_unlock_irqrestore(&card->thread_mask_lock, flags);
return rc;
}
static int qeth_do_reset(void *data);
static void qeth_start_kernel_thread(struct work_struct *work)
{
struct task_struct *ts;
struct qeth_card *card = container_of(work, struct qeth_card,
kernel_thread_starter);
QETH_CARD_TEXT(card , 2, "strthrd");
if (card->read.state != CH_STATE_UP &&
card->write.state != CH_STATE_UP)
return;
if (qeth_do_start_thread(card, QETH_RECOVER_THREAD)) {
ts = kthread_run(qeth_do_reset, card, "qeth_recover");
if (IS_ERR(ts)) {
qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
qeth_clear_thread_running_bit(card,
QETH_RECOVER_THREAD);
}
}
}
static void qeth_buffer_reclaim_work(struct work_struct *);
static void qeth_setup_card(struct qeth_card *card)
{
QETH_CARD_TEXT(card, 2, "setupcrd");
card->info.type = CARD_RDEV(card)->id.driver_info;
card->state = CARD_STATE_DOWN;
spin_lock_init(&card->lock);
spin_lock_init(&card->thread_mask_lock);
mutex_init(&card->conf_mutex);
mutex_init(&card->discipline_mutex);
INIT_WORK(&card->kernel_thread_starter, qeth_start_kernel_thread);
INIT_LIST_HEAD(&card->cmd_waiter_list);
init_waitqueue_head(&card->wait_q);
qeth_set_initial_options(card);
/* IP address takeover */
INIT_LIST_HEAD(&card->ipato.entries);
qeth_init_qdio_info(card);
INIT_DELAYED_WORK(&card->buffer_reclaim_work, qeth_buffer_reclaim_work);
INIT_WORK(&card->close_dev_work, qeth_close_dev_handler);
hash_init(card->local_addrs4);
hash_init(card->local_addrs6);
spin_lock_init(&card->local_addrs4_lock);
spin_lock_init(&card->local_addrs6_lock);
}
static void qeth_core_sl_print(struct seq_file *m, struct service_level *slr)
{
struct qeth_card *card = container_of(slr, struct qeth_card,
qeth_service_level);
if (card->info.mcl_level[0])
seq_printf(m, "qeth: %s firmware level %s\n",
CARD_BUS_ID(card), card->info.mcl_level);
}
static struct qeth_card *qeth_alloc_card(struct ccwgroup_device *gdev)
{
struct qeth_card *card;
QETH_DBF_TEXT(SETUP, 2, "alloccrd");
card = kzalloc(sizeof(*card), GFP_KERNEL);
if (!card)
goto out;
QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
card->gdev = gdev;
dev_set_drvdata(&gdev->dev, card);
CARD_RDEV(card) = gdev->cdev[0];
CARD_WDEV(card) = gdev->cdev[1];
CARD_DDEV(card) = gdev->cdev[2];
card->event_wq = alloc_ordered_workqueue("%s_event", 0,
dev_name(&gdev->dev));
if (!card->event_wq)
goto out_wq;
card->read_cmd = qeth_alloc_cmd(&card->read, QETH_BUFSIZE, 1, 0);
if (!card->read_cmd)
goto out_read_cmd;
card->debugfs = debugfs_create_dir(dev_name(&gdev->dev),
qeth_debugfs_root);
debugfs_create_file("local_addrs", 0400, card->debugfs, card,
&qeth_debugfs_local_addr_fops);
card->qeth_service_level.seq_print = qeth_core_sl_print;
register_service_level(&card->qeth_service_level);
return card;
out_read_cmd:
destroy_workqueue(card->event_wq);
out_wq:
dev_set_drvdata(&gdev->dev, NULL);
kfree(card);
out:
return NULL;
}
static int qeth_clear_channel(struct qeth_card *card,
struct qeth_channel *channel)
{
int rc;
QETH_CARD_TEXT(card, 3, "clearch");
spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
rc = ccw_device_clear(channel->ccwdev, (addr_t)channel->active_cmd);
spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));
if (rc)
return rc;
rc = wait_event_interruptible_timeout(card->wait_q,
channel->state == CH_STATE_STOPPED, QETH_TIMEOUT);
if (rc == -ERESTARTSYS)
return rc;
if (channel->state != CH_STATE_STOPPED)
return -ETIME;
channel->state = CH_STATE_DOWN;
return 0;
}
static int qeth_halt_channel(struct qeth_card *card,
struct qeth_channel *channel)
{
int rc;
QETH_CARD_TEXT(card, 3, "haltch");
spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
rc = ccw_device_halt(channel->ccwdev, (addr_t)channel->active_cmd);
spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));
if (rc)
return rc;
rc = wait_event_interruptible_timeout(card->wait_q,
channel->state == CH_STATE_HALTED, QETH_TIMEOUT);
if (rc == -ERESTARTSYS)
return rc;
if (channel->state != CH_STATE_HALTED)
return -ETIME;
return 0;
}
int qeth_stop_channel(struct qeth_channel *channel)
{
struct ccw_device *cdev = channel->ccwdev;
int rc;
rc = ccw_device_set_offline(cdev);
spin_lock_irq(get_ccwdev_lock(cdev));
if (channel->active_cmd) {
dev_err(&cdev->dev, "Stopped channel while cmd %px was still active\n",
channel->active_cmd);
channel->active_cmd = NULL;
}
cdev->handler = NULL;
spin_unlock_irq(get_ccwdev_lock(cdev));
return rc;
}
EXPORT_SYMBOL_GPL(qeth_stop_channel);
static int qeth_start_channel(struct qeth_channel *channel)
{
struct ccw_device *cdev = channel->ccwdev;
int rc;
channel->state = CH_STATE_DOWN;
atomic_set(&channel->irq_pending, 0);
spin_lock_irq(get_ccwdev_lock(cdev));
cdev->handler = qeth_irq;
spin_unlock_irq(get_ccwdev_lock(cdev));
rc = ccw_device_set_online(cdev);
if (rc)
goto err;
return 0;
err:
spin_lock_irq(get_ccwdev_lock(cdev));
cdev->handler = NULL;
spin_unlock_irq(get_ccwdev_lock(cdev));
return rc;
}
static int qeth_halt_channels(struct qeth_card *card)
{
int rc1 = 0, rc2 = 0, rc3 = 0;
QETH_CARD_TEXT(card, 3, "haltchs");
rc1 = qeth_halt_channel(card, &card->read);
rc2 = qeth_halt_channel(card, &card->write);
rc3 = qeth_halt_channel(card, &card->data);
if (rc1)
return rc1;
if (rc2)
return rc2;
return rc3;
}
static int qeth_clear_channels(struct qeth_card *card)
{
int rc1 = 0, rc2 = 0, rc3 = 0;
QETH_CARD_TEXT(card, 3, "clearchs");
rc1 = qeth_clear_channel(card, &card->read);
rc2 = qeth_clear_channel(card, &card->write);
rc3 = qeth_clear_channel(card, &card->data);
if (rc1)
return rc1;
if (rc2)
return rc2;
return rc3;
}
static int qeth_clear_halt_card(struct qeth_card *card, int halt)
{
int rc = 0;
QETH_CARD_TEXT(card, 3, "clhacrd");
if (halt)
rc = qeth_halt_channels(card);
if (rc)
return rc;
return qeth_clear_channels(card);
}
int qeth_qdio_clear_card(struct qeth_card *card, int use_halt)
{
int rc = 0;
QETH_CARD_TEXT(card, 3, "qdioclr");
switch (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_ESTABLISHED,
QETH_QDIO_CLEANING)) {
case QETH_QDIO_ESTABLISHED:
if (IS_IQD(card))
rc = qdio_shutdown(CARD_DDEV(card),
QDIO_FLAG_CLEANUP_USING_HALT);
else
rc = qdio_shutdown(CARD_DDEV(card),
QDIO_FLAG_CLEANUP_USING_CLEAR);
if (rc)
QETH_CARD_TEXT_(card, 3, "1err%d", rc);
atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
break;
case QETH_QDIO_CLEANING:
return rc;
default:
break;
}
rc = qeth_clear_halt_card(card, use_halt);
if (rc)
QETH_CARD_TEXT_(card, 3, "2err%d", rc);
return rc;
}
EXPORT_SYMBOL_GPL(qeth_qdio_clear_card);
static enum qeth_discipline_id qeth_vm_detect_layer(struct qeth_card *card)
{
enum qeth_discipline_id disc = QETH_DISCIPLINE_UNDETERMINED;
struct diag26c_vnic_resp *response = NULL;
struct diag26c_vnic_req *request = NULL;
struct ccw_dev_id id;
char userid[80];
int rc = 0;
QETH_CARD_TEXT(card, 2, "vmlayer");
cpcmd("QUERY USERID", userid, sizeof(userid), &rc);
if (rc)
goto out;
request = kzalloc(sizeof(*request), GFP_KERNEL | GFP_DMA);
response = kzalloc(sizeof(*response), GFP_KERNEL | GFP_DMA);
if (!request || !response) {
rc = -ENOMEM;
goto out;
}
ccw_device_get_id(CARD_RDEV(card), &id);
request->resp_buf_len = sizeof(*response);
request->resp_version = DIAG26C_VERSION6_VM65918;
request->req_format = DIAG26C_VNIC_INFO;
ASCEBC(userid, 8);
memcpy(&request->sys_name, userid, 8);
request->devno = id.devno;
QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
rc = diag26c(request, response, DIAG26C_PORT_VNIC);
QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
if (rc)
goto out;
QETH_DBF_HEX(CTRL, 2, response, sizeof(*response));
if (request->resp_buf_len < sizeof(*response) ||
response->version != request->resp_version) {
rc = -EIO;
goto out;
}
if (response->protocol == VNIC_INFO_PROT_L2)
disc = QETH_DISCIPLINE_LAYER2;
else if (response->protocol == VNIC_INFO_PROT_L3)
disc = QETH_DISCIPLINE_LAYER3;
out:
kfree(response);
kfree(request);
if (rc)
QETH_CARD_TEXT_(card, 2, "err%x", rc);
return disc;
}
/* Determine whether the device requires a specific layer discipline */
static enum qeth_discipline_id qeth_enforce_discipline(struct qeth_card *card)
{
enum qeth_discipline_id disc = QETH_DISCIPLINE_UNDETERMINED;
if (IS_OSM(card) || IS_OSN(card))
disc = QETH_DISCIPLINE_LAYER2;
else if (IS_VM_NIC(card))
disc = IS_IQD(card) ? QETH_DISCIPLINE_LAYER3 :
qeth_vm_detect_layer(card);
switch (disc) {
case QETH_DISCIPLINE_LAYER2:
QETH_CARD_TEXT(card, 3, "force l2");
break;
case QETH_DISCIPLINE_LAYER3:
QETH_CARD_TEXT(card, 3, "force l3");
break;
default:
QETH_CARD_TEXT(card, 3, "force no");
}
return disc;
}
static void qeth_set_blkt_defaults(struct qeth_card *card)
{
QETH_CARD_TEXT(card, 2, "cfgblkt");
if (card->info.use_v1_blkt) {
card->info.blkt.time_total = 0;
card->info.blkt.inter_packet = 0;
card->info.blkt.inter_packet_jumbo = 0;
} else {
card->info.blkt.time_total = 250;
card->info.blkt.inter_packet = 5;
card->info.blkt.inter_packet_jumbo = 15;
}
}
static void qeth_idx_init(struct qeth_card *card)
{
memset(&card->seqno, 0, sizeof(card->seqno));
card->token.issuer_rm_w = 0x00010103UL;
card->token.cm_filter_w = 0x00010108UL;
card->token.cm_connection_w = 0x0001010aUL;
card->token.ulp_filter_w = 0x0001010bUL;
card->token.ulp_connection_w = 0x0001010dUL;
switch (card->info.type) {
case QETH_CARD_TYPE_IQD:
card->info.func_level = QETH_IDX_FUNC_LEVEL_IQD;
break;
case QETH_CARD_TYPE_OSD:
case QETH_CARD_TYPE_OSN:
card->info.func_level = QETH_IDX_FUNC_LEVEL_OSD;
break;
default:
break;
}
}
static void qeth_idx_finalize_cmd(struct qeth_card *card,
struct qeth_cmd_buffer *iob)
{
memcpy(QETH_TRANSPORT_HEADER_SEQ_NO(iob->data), &card->seqno.trans_hdr,
QETH_SEQ_NO_LENGTH);
if (iob->channel == &card->write)
card->seqno.trans_hdr++;
}
static int qeth_peer_func_level(int level)
{
if ((level & 0xff) == 8)
return (level & 0xff) + 0x400;
if (((level >> 8) & 3) == 1)
return (level & 0xff) + 0x200;
return level;
}
static void qeth_mpc_finalize_cmd(struct qeth_card *card,
struct qeth_cmd_buffer *iob)
{
qeth_idx_finalize_cmd(card, iob);
memcpy(QETH_PDU_HEADER_SEQ_NO(iob->data),
&card->seqno.pdu_hdr, QETH_SEQ_NO_LENGTH);
card->seqno.pdu_hdr++;
memcpy(QETH_PDU_HEADER_ACK_SEQ_NO(iob->data),
&card->seqno.pdu_hdr_ack, QETH_SEQ_NO_LENGTH);
iob->callback = qeth_release_buffer_cb;
}
static bool qeth_mpc_match_reply(struct qeth_cmd_buffer *iob,
struct qeth_cmd_buffer *reply)
{
/* MPC cmds are issued strictly in sequence. */
return !IS_IPA(reply->data);
}
static struct qeth_cmd_buffer *qeth_mpc_alloc_cmd(struct qeth_card *card,
void *data,
unsigned int data_length)
{
struct qeth_cmd_buffer *iob;
iob = qeth_alloc_cmd(&card->write, data_length, 1, QETH_TIMEOUT);
if (!iob)
return NULL;
memcpy(iob->data, data, data_length);
qeth_setup_ccw(__ccw_from_cmd(iob), CCW_CMD_WRITE, 0, data_length,
iob->data);
iob->finalize = qeth_mpc_finalize_cmd;
iob->match = qeth_mpc_match_reply;
return iob;
}
/**
* qeth_send_control_data() - send control command to the card
* @card: qeth_card structure pointer
* @iob: qeth_cmd_buffer pointer
* @reply_cb: callback function pointer
* @cb_card: pointer to the qeth_card structure
* @cb_reply: pointer to the qeth_reply structure
* @cb_cmd: pointer to the original iob for non-IPA
* commands, or to the qeth_ipa_cmd structure
* for the IPA commands.
* @reply_param: private pointer passed to the callback
*
* Callback function gets called one or more times, with cb_cmd
* pointing to the response returned by the hardware. Callback
* function must return
* > 0 if more reply blocks are expected,
* 0 if the last or only reply block is received, and
* < 0 on error.
* Callback function can get the value of the reply_param pointer from the
* field 'param' of the structure qeth_reply.
*/
static int qeth_send_control_data(struct qeth_card *card,
struct qeth_cmd_buffer *iob,
int (*reply_cb)(struct qeth_card *cb_card,
struct qeth_reply *cb_reply,
unsigned long cb_cmd),
void *reply_param)
{
struct qeth_channel *channel = iob->channel;
struct qeth_reply *reply = &iob->reply;
long timeout = iob->timeout;
int rc;
QETH_CARD_TEXT(card, 2, "sendctl");
reply->callback = reply_cb;
reply->param = reply_param;
timeout = wait_event_interruptible_timeout(card->wait_q,
qeth_trylock_channel(channel),
timeout);
if (timeout <= 0) {
qeth_put_cmd(iob);
return (timeout == -ERESTARTSYS) ? -EINTR : -ETIME;
}
if (iob->finalize)
iob->finalize(card, iob);
QETH_DBF_HEX(CTRL, 2, iob->data, min(iob->length, QETH_DBF_CTRL_LEN));
qeth_enqueue_cmd(card, iob);
/* This pairs with iob->callback, and keeps the iob alive after IO: */
qeth_get_cmd(iob);
QETH_CARD_TEXT(card, 6, "noirqpnd");
spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
rc = ccw_device_start_timeout(channel->ccwdev, __ccw_from_cmd(iob),
(addr_t) iob, 0, 0, timeout);
if (!rc)
channel->active_cmd = iob;
spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));
if (rc) {
QETH_DBF_MESSAGE(2, "qeth_send_control_data on device %x: ccw_device_start rc = %i\n",
CARD_DEVID(card), rc);
QETH_CARD_TEXT_(card, 2, " err%d", rc);
qeth_dequeue_cmd(card, iob);
qeth_put_cmd(iob);
qeth_unlock_channel(card, channel);
goto out;
}
timeout = wait_for_completion_interruptible_timeout(&iob->done,
timeout);
if (timeout <= 0)
rc = (timeout == -ERESTARTSYS) ? -EINTR : -ETIME;
qeth_dequeue_cmd(card, iob);
if (reply_cb) {
/* Wait until the callback for a late reply has completed: */
spin_lock_irq(&iob->lock);
if (rc)
/* Zap any callback that's still pending: */
iob->rc = rc;
spin_unlock_irq(&iob->lock);
}
if (!rc)
rc = iob->rc;
out:
qeth_put_cmd(iob);
return rc;
}
struct qeth_node_desc {
struct node_descriptor nd1;
struct node_descriptor nd2;
struct node_descriptor nd3;
};
static void qeth_read_conf_data_cb(struct qeth_card *card,
struct qeth_cmd_buffer *iob,
unsigned int data_length)
{
struct qeth_node_desc *nd = (struct qeth_node_desc *) iob->data;
int rc = 0;
u8 *tag;
QETH_CARD_TEXT(card, 2, "cfgunit");
if (data_length < sizeof(*nd)) {
rc = -EINVAL;
goto out;
}
card->info.is_vm_nic = nd->nd1.plant[0] == _ascebc['V'] &&
nd->nd1.plant[1] == _ascebc['M'];
tag = (u8 *)&nd->nd1.tag;
card->info.chpid = tag[0];
card->info.unit_addr2 = tag[1];
tag = (u8 *)&nd->nd2.tag;
card->info.cula = tag[1];
card->info.use_v1_blkt = nd->nd3.model[0] == 0xF0 &&
nd->nd3.model[1] == 0xF0 &&
nd->nd3.model[2] >= 0xF1 &&
nd->nd3.model[2] <= 0xF4;
out:
qeth_notify_cmd(iob, rc);
qeth_put_cmd(iob);
}
static int qeth_read_conf_data(struct qeth_card *card)
{
struct qeth_channel *channel = &card->data;
struct qeth_cmd_buffer *iob;
struct ciw *ciw;
/* scan for RCD command in extended SenseID data */
ciw = ccw_device_get_ciw(channel->ccwdev, CIW_TYPE_RCD);
if (!ciw || ciw->cmd == 0)
return -EOPNOTSUPP;
if (ciw->count < sizeof(struct qeth_node_desc))
return -EINVAL;
iob = qeth_alloc_cmd(channel, ciw->count, 1, QETH_RCD_TIMEOUT);
if (!iob)
return -ENOMEM;
iob->callback = qeth_read_conf_data_cb;
qeth_setup_ccw(__ccw_from_cmd(iob), ciw->cmd, 0, iob->length,
iob->data);
return qeth_send_control_data(card, iob, NULL, NULL);
}
static int qeth_idx_check_activate_response(struct qeth_card *card,
struct qeth_channel *channel,
struct qeth_cmd_buffer *iob)
{
int rc;
rc = qeth_check_idx_response(card, iob->data);
if (rc)
return rc;
if (QETH_IS_IDX_ACT_POS_REPLY(iob->data))
return 0;
/* negative reply: */
QETH_CARD_TEXT_(card, 2, "idxneg%c",
QETH_IDX_ACT_CAUSE_CODE(iob->data));
switch (QETH_IDX_ACT_CAUSE_CODE(iob->data)) {
case QETH_IDX_ACT_ERR_EXCL:
dev_err(&channel->ccwdev->dev,
"The adapter is used exclusively by another host\n");
return -EBUSY;
case QETH_IDX_ACT_ERR_AUTH:
case QETH_IDX_ACT_ERR_AUTH_USER:
dev_err(&channel->ccwdev->dev,
"Setting the device online failed because of insufficient authorization\n");
return -EPERM;
default:
QETH_DBF_MESSAGE(2, "IDX_ACTIVATE on channel %x: negative reply\n",
CCW_DEVID(channel->ccwdev));
return -EIO;
}
}
static void qeth_idx_activate_read_channel_cb(struct qeth_card *card,
struct qeth_cmd_buffer *iob,
unsigned int data_length)
{
struct qeth_channel *channel = iob->channel;
u16 peer_level;
int rc;
QETH_CARD_TEXT(card, 2, "idxrdcb");
rc = qeth_idx_check_activate_response(card, channel, iob);
if (rc)
goto out;
memcpy(&peer_level, QETH_IDX_ACT_FUNC_LEVEL(iob->data), 2);
if (peer_level != qeth_peer_func_level(card->info.func_level)) {
QETH_DBF_MESSAGE(2, "IDX_ACTIVATE on channel %x: function level mismatch (sent: %#x, received: %#x)\n",
CCW_DEVID(channel->ccwdev),
card->info.func_level, peer_level);
rc = -EINVAL;
goto out;
}
memcpy(&card->token.issuer_rm_r,
QETH_IDX_ACT_ISSUER_RM_TOKEN(iob->data),
QETH_MPC_TOKEN_LENGTH);
memcpy(&card->info.mcl_level[0],
QETH_IDX_REPLY_LEVEL(iob->data), QETH_MCL_LENGTH);
out:
qeth_notify_cmd(iob, rc);
qeth_put_cmd(iob);
}
static void qeth_idx_activate_write_channel_cb(struct qeth_card *card,
struct qeth_cmd_buffer *iob,
unsigned int data_length)
{
struct qeth_channel *channel = iob->channel;
u16 peer_level;
int rc;
QETH_CARD_TEXT(card, 2, "idxwrcb");
rc = qeth_idx_check_activate_response(card, channel, iob);
if (rc)
goto out;
memcpy(&peer_level, QETH_IDX_ACT_FUNC_LEVEL(iob->data), 2);
if ((peer_level & ~0x0100) !=
qeth_peer_func_level(card->info.func_level)) {
QETH_DBF_MESSAGE(2, "IDX_ACTIVATE on channel %x: function level mismatch (sent: %#x, received: %#x)\n",
CCW_DEVID(channel->ccwdev),
card->info.func_level, peer_level);
rc = -EINVAL;
}
out:
qeth_notify_cmd(iob, rc);
qeth_put_cmd(iob);
}
static void qeth_idx_setup_activate_cmd(struct qeth_card *card,
struct qeth_cmd_buffer *iob)
{
u16 addr = (card->info.cula << 8) + card->info.unit_addr2;
u8 port = ((u8)card->dev->dev_port) | 0x80;
struct ccw1 *ccw = __ccw_from_cmd(iob);
struct ccw_dev_id dev_id;
qeth_setup_ccw(&ccw[0], CCW_CMD_WRITE, CCW_FLAG_CC, IDX_ACTIVATE_SIZE,
iob->data);
qeth_setup_ccw(&ccw[1], CCW_CMD_READ, 0, iob->length, iob->data);
ccw_device_get_id(CARD_DDEV(card), &dev_id);
iob->finalize = qeth_idx_finalize_cmd;
port |= QETH_IDX_ACT_INVAL_FRAME;
memcpy(QETH_IDX_ACT_PNO(iob->data), &port, 1);
memcpy(QETH_IDX_ACT_ISSUER_RM_TOKEN(iob->data),
&card->token.issuer_rm_w, QETH_MPC_TOKEN_LENGTH);
memcpy(QETH_IDX_ACT_FUNC_LEVEL(iob->data),
&card->info.func_level, 2);
memcpy(QETH_IDX_ACT_QDIO_DEV_CUA(iob->data), &dev_id.devno, 2);
memcpy(QETH_IDX_ACT_QDIO_DEV_REALADDR(iob->data), &addr, 2);
}
static int qeth_idx_activate_read_channel(struct qeth_card *card)
{
struct qeth_channel *channel = &card->read;
struct qeth_cmd_buffer *iob;
int rc;
QETH_CARD_TEXT(card, 2, "idxread");
iob = qeth_alloc_cmd(channel, QETH_BUFSIZE, 2, QETH_TIMEOUT);
if (!iob)
return -ENOMEM;
memcpy(iob->data, IDX_ACTIVATE_READ, IDX_ACTIVATE_SIZE);
qeth_idx_setup_activate_cmd(card, iob);
iob->callback = qeth_idx_activate_read_channel_cb;
rc = qeth_send_control_data(card, iob, NULL, NULL);
if (rc)
return rc;
channel->state = CH_STATE_UP;
return 0;
}
static int qeth_idx_activate_write_channel(struct qeth_card *card)
{
struct qeth_channel *channel = &card->write;
struct qeth_cmd_buffer *iob;
int rc;
QETH_CARD_TEXT(card, 2, "idxwrite");
iob = qeth_alloc_cmd(channel, QETH_BUFSIZE, 2, QETH_TIMEOUT);
if (!iob)
return -ENOMEM;
memcpy(iob->data, IDX_ACTIVATE_WRITE, IDX_ACTIVATE_SIZE);
qeth_idx_setup_activate_cmd(card, iob);
iob->callback = qeth_idx_activate_write_channel_cb;
rc = qeth_send_control_data(card, iob, NULL, NULL);
if (rc)
return rc;
channel->state = CH_STATE_UP;
return 0;
}
static int qeth_cm_enable_cb(struct qeth_card *card, struct qeth_reply *reply,
unsigned long data)
{
struct qeth_cmd_buffer *iob;
QETH_CARD_TEXT(card, 2, "cmenblcb");
iob = (struct qeth_cmd_buffer *) data;
memcpy(&card->token.cm_filter_r,
QETH_CM_ENABLE_RESP_FILTER_TOKEN(iob->data),
QETH_MPC_TOKEN_LENGTH);
return 0;
}
static int qeth_cm_enable(struct qeth_card *card)
{
struct qeth_cmd_buffer *iob;
QETH_CARD_TEXT(card, 2, "cmenable");
iob = qeth_mpc_alloc_cmd(card, CM_ENABLE, CM_ENABLE_SIZE);
if (!iob)
return -ENOMEM;
memcpy(QETH_CM_ENABLE_ISSUER_RM_TOKEN(iob->data),
&card->token.issuer_rm_r, QETH_MPC_TOKEN_LENGTH);
memcpy(QETH_CM_ENABLE_FILTER_TOKEN(iob->data),
&card->token.cm_filter_w, QETH_MPC_TOKEN_LENGTH);
return qeth_send_control_data(card, iob, qeth_cm_enable_cb, NULL);
}
static int qeth_cm_setup_cb(struct qeth_card *card, struct qeth_reply *reply,
unsigned long data)
{
struct qeth_cmd_buffer *iob;
QETH_CARD_TEXT(card, 2, "cmsetpcb");
iob = (struct qeth_cmd_buffer *) data;
memcpy(&card->token.cm_connection_r,
QETH_CM_SETUP_RESP_DEST_ADDR(iob->data),
QETH_MPC_TOKEN_LENGTH);
return 0;
}
static int qeth_cm_setup(struct qeth_card *card)
{
struct qeth_cmd_buffer *iob;
QETH_CARD_TEXT(card, 2, "cmsetup");
iob = qeth_mpc_alloc_cmd(card, CM_SETUP, CM_SETUP_SIZE);
if (!iob)
return -ENOMEM;
memcpy(QETH_CM_SETUP_DEST_ADDR(iob->data),
&card->token.issuer_rm_r, QETH_MPC_TOKEN_LENGTH);
memcpy(QETH_CM_SETUP_CONNECTION_TOKEN(iob->data),
&card->token.cm_connection_w, QETH_MPC_TOKEN_LENGTH);
memcpy(QETH_CM_SETUP_FILTER_TOKEN(iob->data),
&card->token.cm_filter_r, QETH_MPC_TOKEN_LENGTH);
return qeth_send_control_data(card, iob, qeth_cm_setup_cb, NULL);
}
static int qeth_update_max_mtu(struct qeth_card *card, unsigned int max_mtu)
{
struct net_device *dev = card->dev;
unsigned int new_mtu;
if (!max_mtu) {
/* IQD needs accurate max MTU to set up its RX buffers: */
if (IS_IQD(card))
return -EINVAL;
/* tolerate quirky HW: */
max_mtu = ETH_MAX_MTU;
}
rtnl_lock();
if (IS_IQD(card)) {
/* move any device with default MTU to new max MTU: */
new_mtu = (dev->mtu == dev->max_mtu) ? max_mtu : dev->mtu;
/* adjust RX buffer size to new max MTU: */
card->qdio.in_buf_size = max_mtu + 2 * PAGE_SIZE;
if (dev->max_mtu && dev->max_mtu != max_mtu)
qeth_free_qdio_queues(card);
} else {
if (dev->mtu)
new_mtu = dev->mtu;
/* default MTUs for first setup: */
else if (IS_LAYER2(card))
new_mtu = ETH_DATA_LEN;
else
new_mtu = ETH_DATA_LEN - 8; /* allow for LLC + SNAP */
}
dev->max_mtu = max_mtu;
dev->mtu = min(new_mtu, max_mtu);
rtnl_unlock();
return 0;
}
static int qeth_get_mtu_outof_framesize(int framesize)
{
switch (framesize) {
case 0x4000:
return 8192;
case 0x6000:
return 16384;
case 0xa000:
return 32768;
case 0xffff:
return 57344;
default:
return 0;
}
}
static int qeth_ulp_enable_cb(struct qeth_card *card, struct qeth_reply *reply,
unsigned long data)
{
__u16 mtu, framesize;
__u16 len;
__u8 link_type;
struct qeth_cmd_buffer *iob;
QETH_CARD_TEXT(card, 2, "ulpenacb");
iob = (struct qeth_cmd_buffer *) data;
memcpy(&card->token.ulp_filter_r,
QETH_ULP_ENABLE_RESP_FILTER_TOKEN(iob->data),
QETH_MPC_TOKEN_LENGTH);
if (IS_IQD(card)) {
memcpy(&framesize, QETH_ULP_ENABLE_RESP_MAX_MTU(iob->data), 2);
mtu = qeth_get_mtu_outof_framesize(framesize);
} else {
mtu = *(__u16 *)QETH_ULP_ENABLE_RESP_MAX_MTU(iob->data);
}
*(u16 *)reply->param = mtu;
memcpy(&len, QETH_ULP_ENABLE_RESP_DIFINFO_LEN(iob->data), 2);
if (len >= QETH_MPC_DIFINFO_LEN_INDICATES_LINK_TYPE) {
memcpy(&link_type,
QETH_ULP_ENABLE_RESP_LINK_TYPE(iob->data), 1);
card->info.link_type = link_type;
} else
card->info.link_type = 0;
QETH_CARD_TEXT_(card, 2, "link%d", card->info.link_type);
return 0;
}
static u8 qeth_mpc_select_prot_type(struct qeth_card *card)
{
if (IS_OSN(card))
return QETH_PROT_OSN2;
return IS_LAYER2(card) ? QETH_PROT_LAYER2 : QETH_PROT_TCPIP;
}
static int qeth_ulp_enable(struct qeth_card *card)
{
u8 prot_type = qeth_mpc_select_prot_type(card);
struct qeth_cmd_buffer *iob;
u16 max_mtu;
int rc;
QETH_CARD_TEXT(card, 2, "ulpenabl");
iob = qeth_mpc_alloc_cmd(card, ULP_ENABLE, ULP_ENABLE_SIZE);
if (!iob)
return -ENOMEM;
*(QETH_ULP_ENABLE_LINKNUM(iob->data)) = (u8) card->dev->dev_port;
memcpy(QETH_ULP_ENABLE_PROT_TYPE(iob->data), &prot_type, 1);
memcpy(QETH_ULP_ENABLE_DEST_ADDR(iob->data),
&card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
memcpy(QETH_ULP_ENABLE_FILTER_TOKEN(iob->data),
&card->token.ulp_filter_w, QETH_MPC_TOKEN_LENGTH);
rc = qeth_send_control_data(card, iob, qeth_ulp_enable_cb, &max_mtu);
if (rc)
return rc;
return qeth_update_max_mtu(card, max_mtu);
}
static int qeth_ulp_setup_cb(struct qeth_card *card, struct qeth_reply *reply,
unsigned long data)
{
struct qeth_cmd_buffer *iob;
QETH_CARD_TEXT(card, 2, "ulpstpcb");
iob = (struct qeth_cmd_buffer *) data;
memcpy(&card->token.ulp_connection_r,
QETH_ULP_SETUP_RESP_CONNECTION_TOKEN(iob->data),
QETH_MPC_TOKEN_LENGTH);
if (!strncmp("00S", QETH_ULP_SETUP_RESP_CONNECTION_TOKEN(iob->data),
3)) {
QETH_CARD_TEXT(card, 2, "olmlimit");
dev_err(&card->gdev->dev, "A connection could not be "
"established because of an OLM limit\n");
return -EMLINK;
}
return 0;
}
static int qeth_ulp_setup(struct qeth_card *card)
{
__u16 temp;
struct qeth_cmd_buffer *iob;
struct ccw_dev_id dev_id;
QETH_CARD_TEXT(card, 2, "ulpsetup");
iob = qeth_mpc_alloc_cmd(card, ULP_SETUP, ULP_SETUP_SIZE);
if (!iob)
return -ENOMEM;
memcpy(QETH_ULP_SETUP_DEST_ADDR(iob->data),
&card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
memcpy(QETH_ULP_SETUP_CONNECTION_TOKEN(iob->data),
&card->token.ulp_connection_w, QETH_MPC_TOKEN_LENGTH);
memcpy(QETH_ULP_SETUP_FILTER_TOKEN(iob->data),
&card->token.ulp_filter_r, QETH_MPC_TOKEN_LENGTH);
ccw_device_get_id(CARD_DDEV(card), &dev_id);
memcpy(QETH_ULP_SETUP_CUA(iob->data), &dev_id.devno, 2);
temp = (card->info.cula << 8) + card->info.unit_addr2;
memcpy(QETH_ULP_SETUP_REAL_DEVADDR(iob->data), &temp, 2);
return qeth_send_control_data(card, iob, qeth_ulp_setup_cb, NULL);
}
static int qeth_init_qdio_out_buf(struct qeth_qdio_out_q *q, int bidx)
{
struct qeth_qdio_out_buffer *newbuf;
newbuf = kmem_cache_zalloc(qeth_qdio_outbuf_cache, GFP_ATOMIC);
if (!newbuf)
return -ENOMEM;
newbuf->buffer = q->qdio_bufs[bidx];
skb_queue_head_init(&newbuf->skb_list);
lockdep_set_class(&newbuf->skb_list.lock, &qdio_out_skb_queue_key);
newbuf->q = q;
newbuf->next_pending = q->bufs[bidx];
atomic_set(&newbuf->state, QETH_QDIO_BUF_EMPTY);
q->bufs[bidx] = newbuf;
return 0;
}
static void qeth_free_output_queue(struct qeth_qdio_out_q *q)
{
if (!q)
return;
qeth_drain_output_queue(q, true);
qdio_free_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
kfree(q);
}
static struct qeth_qdio_out_q *qeth_alloc_output_queue(void)
{
struct qeth_qdio_out_q *q = kzalloc(sizeof(*q), GFP_KERNEL);
if (!q)
return NULL;
if (qdio_alloc_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q)) {
kfree(q);
return NULL;
}
return q;
}
static void qeth_tx_completion_timer(struct timer_list *timer)
{
struct qeth_qdio_out_q *queue = from_timer(queue, timer, timer);
napi_schedule(&queue->napi);
QETH_TXQ_STAT_INC(queue, completion_timer);
}
static int qeth_alloc_qdio_queues(struct qeth_card *card)
{
int i, j;
QETH_CARD_TEXT(card, 2, "allcqdbf");
if (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_UNINITIALIZED,
QETH_QDIO_ALLOCATED) != QETH_QDIO_UNINITIALIZED)
return 0;
QETH_CARD_TEXT(card, 2, "inq");
card->qdio.in_q = qeth_alloc_qdio_queue();
if (!card->qdio.in_q)
goto out_nomem;
/* inbound buffer pool */
if (qeth_alloc_buffer_pool(card))
goto out_freeinq;
/* outbound */
for (i = 0; i < card->qdio.no_out_queues; ++i) {
struct qeth_qdio_out_q *queue;
queue = qeth_alloc_output_queue();
if (!queue)
goto out_freeoutq;
QETH_CARD_TEXT_(card, 2, "outq %i", i);
QETH_CARD_HEX(card, 2, &queue, sizeof(void *));
card->qdio.out_qs[i] = queue;
queue->card = card;
queue->queue_no = i;
timer_setup(&queue->timer, qeth_tx_completion_timer, 0);
queue->coalesce_usecs = QETH_TX_COALESCE_USECS;
queue->max_coalesced_frames = QETH_TX_MAX_COALESCED_FRAMES;
/* give outbound qeth_qdio_buffers their qdio_buffers */
for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
WARN_ON(queue->bufs[j]);
if (qeth_init_qdio_out_buf(queue, j))
goto out_freeoutqbufs;
}
}
/* completion */
if (qeth_alloc_cq(card))
goto out_freeoutq;
return 0;
out_freeoutqbufs:
while (j > 0) {
--j;
kmem_cache_free(qeth_qdio_outbuf_cache,
card->qdio.out_qs[i]->bufs[j]);
card->qdio.out_qs[i]->bufs[j] = NULL;
}
out_freeoutq:
while (i > 0) {
qeth_free_output_queue(card->qdio.out_qs[--i]);
card->qdio.out_qs[i] = NULL;
}
qeth_free_buffer_pool(card);
out_freeinq:
qeth_free_qdio_queue(card->qdio.in_q);
card->qdio.in_q = NULL;
out_nomem:
atomic_set(&card->qdio.state, QETH_QDIO_UNINITIALIZED);
return -ENOMEM;
}
static void qeth_free_qdio_queues(struct qeth_card *card)
{
int i, j;
if (atomic_xchg(&card->qdio.state, QETH_QDIO_UNINITIALIZED) ==
QETH_QDIO_UNINITIALIZED)
return;
qeth_free_cq(card);
for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
if (card->qdio.in_q->bufs[j].rx_skb)
dev_kfree_skb_any(card->qdio.in_q->bufs[j].rx_skb);
}
qeth_free_qdio_queue(card->qdio.in_q);
card->qdio.in_q = NULL;
/* inbound buffer pool */
qeth_free_buffer_pool(card);
/* free outbound qdio_qs */
for (i = 0; i < card->qdio.no_out_queues; i++) {
qeth_free_output_queue(card->qdio.out_qs[i]);
card->qdio.out_qs[i] = NULL;
}
}
static void qeth_create_qib_param_field(struct qeth_card *card,
char *param_field)
{
param_field[0] = _ascebc['P'];
param_field[1] = _ascebc['C'];
param_field[2] = _ascebc['I'];
param_field[3] = _ascebc['T'];
*((unsigned int *) (&param_field[4])) = QETH_PCI_THRESHOLD_A(card);
*((unsigned int *) (&param_field[8])) = QETH_PCI_THRESHOLD_B(card);
*((unsigned int *) (&param_field[12])) = QETH_PCI_TIMER_VALUE(card);
}
static void qeth_create_qib_param_field_blkt(struct qeth_card *card,
char *param_field)
{
param_field[16] = _ascebc['B'];
param_field[17] = _ascebc['L'];
param_field[18] = _ascebc['K'];
param_field[19] = _ascebc['T'];
*((unsigned int *) (&param_field[20])) = card->info.blkt.time_total;
*((unsigned int *) (&param_field[24])) = card->info.blkt.inter_packet;
*((unsigned int *) (&param_field[28])) =
card->info.blkt.inter_packet_jumbo;
}
static int qeth_qdio_activate(struct qeth_card *card)
{
QETH_CARD_TEXT(card, 3, "qdioact");
return qdio_activate(CARD_DDEV(card));
}
static int qeth_dm_act(struct qeth_card *card)
{
struct qeth_cmd_buffer *iob;
QETH_CARD_TEXT(card, 2, "dmact");
iob = qeth_mpc_alloc_cmd(card, DM_ACT, DM_ACT_SIZE);
if (!iob)
return -ENOMEM;
memcpy(QETH_DM_ACT_DEST_ADDR(iob->data),
&card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
memcpy(QETH_DM_ACT_CONNECTION_TOKEN(iob->data),
&card->token.ulp_connection_r, QETH_MPC_TOKEN_LENGTH);
return qeth_send_control_data(card, iob, NULL, NULL);
}
static int qeth_mpc_initialize(struct qeth_card *card)
{
int rc;
QETH_CARD_TEXT(card, 2, "mpcinit");
rc = qeth_issue_next_read(card);
if (rc) {
QETH_CARD_TEXT_(card, 2, "1err%d", rc);
return rc;
}
rc = qeth_cm_enable(card);
if (rc) {
QETH_CARD_TEXT_(card, 2, "2err%d", rc);
return rc;
}
rc = qeth_cm_setup(card);
if (rc) {
QETH_CARD_TEXT_(card, 2, "3err%d", rc);
return rc;
}
rc = qeth_ulp_enable(card);
if (rc) {
QETH_CARD_TEXT_(card, 2, "4err%d", rc);
return rc;
}
rc = qeth_ulp_setup(card);
if (rc) {
QETH_CARD_TEXT_(card, 2, "5err%d", rc);
return rc;
}
rc = qeth_alloc_qdio_queues(card);
if (rc) {
QETH_CARD_TEXT_(card, 2, "5err%d", rc);
return rc;
}
rc = qeth_qdio_establish(card);
if (rc) {
QETH_CARD_TEXT_(card, 2, "6err%d", rc);
qeth_free_qdio_queues(card);
return rc;
}
rc = qeth_qdio_activate(card);
if (rc) {
QETH_CARD_TEXT_(card, 2, "7err%d", rc);
return rc;
}
rc = qeth_dm_act(card);
if (rc) {
QETH_CARD_TEXT_(card, 2, "8err%d", rc);
return rc;
}
return 0;
}
void qeth_print_status_message(struct qeth_card *card)
{
switch (card->info.type) {
case QETH_CARD_TYPE_OSD:
case QETH_CARD_TYPE_OSM:
case QETH_CARD_TYPE_OSX:
/* VM will use a non-zero first character
* to indicate a HiperSockets like reporting
* of the level OSA sets the first character to zero
* */
if (!card->info.mcl_level[0]) {
sprintf(card->info.mcl_level, "%02x%02x",
card->info.mcl_level[2],
card->info.mcl_level[3]);
break;
}
/* fallthrough */
case QETH_CARD_TYPE_IQD:
if (IS_VM_NIC(card) || (card->info.mcl_level[0] & 0x80)) {
card->info.mcl_level[0] = (char) _ebcasc[(__u8)
card->info.mcl_level[0]];
card->info.mcl_level[1] = (char) _ebcasc[(__u8)
card->info.mcl_level[1]];
card->info.mcl_level[2] = (char) _ebcasc[(__u8)
card->info.mcl_level[2]];
card->info.mcl_level[3] = (char) _ebcasc[(__u8)
card->info.mcl_level[3]];
card->info.mcl_level[QETH_MCL_LENGTH] = 0;
}
break;
default:
memset(&card->info.mcl_level[0], 0, QETH_MCL_LENGTH + 1);
}
dev_info(&card->gdev->dev,
"Device is a%s card%s%s%s\nwith link type %s.\n",
qeth_get_cardname(card),
(card->info.mcl_level[0]) ? " (level: " : "",
(card->info.mcl_level[0]) ? card->info.mcl_level : "",
(card->info.mcl_level[0]) ? ")" : "",
qeth_get_cardname_short(card));
}
EXPORT_SYMBOL_GPL(qeth_print_status_message);
static void qeth_initialize_working_pool_list(struct qeth_card *card)
{
struct qeth_buffer_pool_entry *entry;
QETH_CARD_TEXT(card, 5, "inwrklst");
list_for_each_entry(entry,
&card->qdio.init_pool.entry_list, init_list) {
qeth_put_buffer_pool_entry(card, entry);
}
}
static struct qeth_buffer_pool_entry *qeth_find_free_buffer_pool_entry(
struct qeth_card *card)
{
struct qeth_buffer_pool_entry *entry;
int i, free;
if (list_empty(&card->qdio.in_buf_pool.entry_list))
return NULL;
list_for_each_entry(entry, &card->qdio.in_buf_pool.entry_list, list) {
free = 1;
for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
if (page_count(entry->elements[i]) > 1) {
free = 0;
break;
}
}
if (free) {
list_del_init(&entry->list);
return entry;
}
}
/* no free buffer in pool so take first one and swap pages */
entry = list_first_entry(&card->qdio.in_buf_pool.entry_list,
struct qeth_buffer_pool_entry, list);
for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
if (page_count(entry->elements[i]) > 1) {
struct page *page = dev_alloc_page();
if (!page)
return NULL;
__free_page(entry->elements[i]);
entry->elements[i] = page;
QETH_CARD_STAT_INC(card, rx_sg_alloc_page);
}
}
list_del_init(&entry->list);
return entry;
}
static int qeth_init_input_buffer(struct qeth_card *card,
struct qeth_qdio_buffer *buf)
{
struct qeth_buffer_pool_entry *pool_entry;
int i;
if ((card->options.cq == QETH_CQ_ENABLED) && (!buf->rx_skb)) {
buf->rx_skb = netdev_alloc_skb(card->dev,
ETH_HLEN +
sizeof(struct ipv6hdr));
if (!buf->rx_skb)
return -ENOMEM;
}
pool_entry = qeth_find_free_buffer_pool_entry(card);
if (!pool_entry)
return -ENOBUFS;
/*
* since the buffer is accessed only from the input_tasklet
* there shouldn't be a need to synchronize; also, since we use
* the QETH_IN_BUF_REQUEUE_THRESHOLD we should never run out off
* buffers
*/
buf->pool_entry = pool_entry;
for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
buf->buffer->element[i].length = PAGE_SIZE;
buf->buffer->element[i].addr =
page_to_phys(pool_entry->elements[i]);
if (i == QETH_MAX_BUFFER_ELEMENTS(card) - 1)
buf->buffer->element[i].eflags = SBAL_EFLAGS_LAST_ENTRY;
else
buf->buffer->element[i].eflags = 0;
buf->buffer->element[i].sflags = 0;
}
return 0;
}
static unsigned int qeth_tx_select_bulk_max(struct qeth_card *card,
struct qeth_qdio_out_q *queue)
{
if (!IS_IQD(card) ||
qeth_iqd_is_mcast_queue(card, queue) ||
card->options.cq == QETH_CQ_ENABLED ||
qdio_get_ssqd_desc(CARD_DDEV(card), &card->ssqd))
return 1;
return card->ssqd.mmwc ? card->ssqd.mmwc : 1;
}
static int qeth_init_qdio_queues(struct qeth_card *card)
{
unsigned int i;
int rc;
QETH_CARD_TEXT(card, 2, "initqdqs");
/* inbound queue */
qdio_reset_buffers(card->qdio.in_q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
memset(&card->rx, 0, sizeof(struct qeth_rx));
qeth_initialize_working_pool_list(card);
/*give only as many buffers to hardware as we have buffer pool entries*/
for (i = 0; i < card->qdio.in_buf_pool.buf_count - 1; i++) {
rc = qeth_init_input_buffer(card, &card->qdio.in_q->bufs[i]);
if (rc)
return rc;
}
card->qdio.in_q->next_buf_to_init =
card->qdio.in_buf_pool.buf_count - 1;
rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, 0, 0,
card->qdio.in_buf_pool.buf_count - 1);
if (rc) {
QETH_CARD_TEXT_(card, 2, "1err%d", rc);
return rc;
}
/* completion */
rc = qeth_cq_init(card);
if (rc) {
return rc;
}
/* outbound queue */
for (i = 0; i < card->qdio.no_out_queues; ++i) {
struct qeth_qdio_out_q *queue = card->qdio.out_qs[i];
qdio_reset_buffers(queue->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
queue->max_elements = QETH_MAX_BUFFER_ELEMENTS(card);
queue->next_buf_to_fill = 0;
queue->do_pack = 0;
queue->prev_hdr = NULL;
queue->coalesced_frames = 0;
queue->bulk_start = 0;
queue->bulk_count = 0;
queue->bulk_max = qeth_tx_select_bulk_max(card, queue);
atomic_set(&queue->used_buffers, 0);
atomic_set(&queue->set_pci_flags_count, 0);
atomic_set(&queue->state, QETH_OUT_Q_UNLOCKED);
netdev_tx_reset_queue(netdev_get_tx_queue(card->dev, i));
}
return 0;
}
static void qeth_ipa_finalize_cmd(struct qeth_card *card,
struct qeth_cmd_buffer *iob)
{
qeth_mpc_finalize_cmd(card, iob);
/* override with IPA-specific values: */
__ipa_cmd(iob)->hdr.seqno = card->seqno.ipa++;
}
void qeth_prepare_ipa_cmd(struct qeth_card *card, struct qeth_cmd_buffer *iob,
u16 cmd_length,
bool (*match)(struct qeth_cmd_buffer *iob,
struct qeth_cmd_buffer *reply))
{
u8 prot_type = qeth_mpc_select_prot_type(card);
u16 total_length = iob->length;
qeth_setup_ccw(__ccw_from_cmd(iob), CCW_CMD_WRITE, 0, total_length,
iob->data);
iob->finalize = qeth_ipa_finalize_cmd;
iob->match = match;
memcpy(iob->data, IPA_PDU_HEADER, IPA_PDU_HEADER_SIZE);
memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &total_length, 2);
memcpy(QETH_IPA_CMD_PROT_TYPE(iob->data), &prot_type, 1);
memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &cmd_length, 2);
memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &cmd_length, 2);
memcpy(QETH_IPA_CMD_DEST_ADDR(iob->data),
&card->token.ulp_connection_r, QETH_MPC_TOKEN_LENGTH);
memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &cmd_length, 2);
}
EXPORT_SYMBOL_GPL(qeth_prepare_ipa_cmd);
static bool qeth_ipa_match_reply(struct qeth_cmd_buffer *iob,
struct qeth_cmd_buffer *reply)
{
struct qeth_ipa_cmd *ipa_reply = __ipa_reply(reply);
return ipa_reply && (__ipa_cmd(iob)->hdr.seqno == ipa_reply->hdr.seqno);
}
struct qeth_cmd_buffer *qeth_ipa_alloc_cmd(struct qeth_card *card,
enum qeth_ipa_cmds cmd_code,
enum qeth_prot_versions prot,
unsigned int data_length)
{
enum qeth_link_types link_type = card->info.link_type;
struct qeth_cmd_buffer *iob;
struct qeth_ipacmd_hdr *hdr;
data_length += offsetof(struct qeth_ipa_cmd, data);
iob = qeth_alloc_cmd(&card->write, IPA_PDU_HEADER_SIZE + data_length, 1,
QETH_IPA_TIMEOUT);
if (!iob)
return NULL;
qeth_prepare_ipa_cmd(card, iob, data_length, qeth_ipa_match_reply);
hdr = &__ipa_cmd(iob)->hdr;
hdr->command = cmd_code;
hdr->initiator = IPA_CMD_INITIATOR_HOST;
/* hdr->seqno is set by qeth_send_control_data() */
hdr->adapter_type = (link_type == QETH_LINK_TYPE_HSTR) ? 2 : 1;
hdr->rel_adapter_no = (u8) card->dev->dev_port;
hdr->prim_version_no = IS_LAYER2(card) ? 2 : 1;
hdr->param_count = 1;
hdr->prot_version = prot;
return iob;
}
EXPORT_SYMBOL_GPL(qeth_ipa_alloc_cmd);
static int qeth_send_ipa_cmd_cb(struct qeth_card *card,
struct qeth_reply *reply, unsigned long data)
{
struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
return (cmd->hdr.return_code) ? -EIO : 0;
}
/**
* qeth_send_ipa_cmd() - send an IPA command
*
* See qeth_send_control_data() for explanation of the arguments.
*/
int qeth_send_ipa_cmd(struct qeth_card *card, struct qeth_cmd_buffer *iob,
int (*reply_cb)(struct qeth_card *, struct qeth_reply*,
unsigned long),
void *reply_param)
{
int rc;
QETH_CARD_TEXT(card, 4, "sendipa");
if (card->read_or_write_problem) {
qeth_put_cmd(iob);
return -EIO;
}
if (reply_cb == NULL)
reply_cb = qeth_send_ipa_cmd_cb;
rc = qeth_send_control_data(card, iob, reply_cb, reply_param);
if (rc == -ETIME) {
qeth_clear_ipacmd_list(card);
qeth_schedule_recovery(card);
}
return rc;
}
EXPORT_SYMBOL_GPL(qeth_send_ipa_cmd);
static int qeth_send_startlan_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 == IPA_RC_LAN_OFFLINE)
return -ENETDOWN;
return (cmd->hdr.return_code) ? -EIO : 0;
}
static int qeth_send_startlan(struct qeth_card *card)
{
struct qeth_cmd_buffer *iob;
QETH_CARD_TEXT(card, 2, "strtlan");
iob = qeth_ipa_alloc_cmd(card, IPA_CMD_STARTLAN, QETH_PROT_NONE, 0);
if (!iob)
return -ENOMEM;
return qeth_send_ipa_cmd(card, iob, qeth_send_startlan_cb, NULL);
}
static int qeth_setadpparms_inspect_rc(struct qeth_ipa_cmd *cmd)
{
if (!cmd->hdr.return_code)
cmd->hdr.return_code =
cmd->data.setadapterparms.hdr.return_code;
return cmd->hdr.return_code;
}
static int qeth_query_setadapterparms_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, 3, "quyadpcb");
if (qeth_setadpparms_inspect_rc(cmd))
return -EIO;
if (cmd->data.setadapterparms.data.query_cmds_supp.lan_type & 0x7f) {
card->info.link_type =
cmd->data.setadapterparms.data.query_cmds_supp.lan_type;
QETH_CARD_TEXT_(card, 2, "lnk %d", card->info.link_type);
}
card->options.adp.supported =
cmd->data.setadapterparms.data.query_cmds_supp.supported_cmds;
return 0;
}
static struct qeth_cmd_buffer *qeth_get_adapter_cmd(struct qeth_card *card,
enum qeth_ipa_setadp_cmd adp_cmd,
unsigned int data_length)
{
struct qeth_ipacmd_setadpparms_hdr *hdr;
struct qeth_cmd_buffer *iob;
iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SETADAPTERPARMS, QETH_PROT_IPV4,
data_length +
offsetof(struct qeth_ipacmd_setadpparms,
data));
if (!iob)
return NULL;
hdr = &__ipa_cmd(iob)->data.setadapterparms.hdr;
hdr->cmdlength = sizeof(*hdr) + data_length;
hdr->command_code = adp_cmd;
hdr->used_total = 1;
hdr->seq_no = 1;
return iob;
}
static int qeth_query_setadapterparms(struct qeth_card *card)
{
int rc;
struct qeth_cmd_buffer *iob;
QETH_CARD_TEXT(card, 3, "queryadp");
iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_COMMANDS_SUPPORTED,
SETADP_DATA_SIZEOF(query_cmds_supp));
if (!iob)
return -ENOMEM;
rc = qeth_send_ipa_cmd(card, iob, qeth_query_setadapterparms_cb, NULL);
return rc;
}
static int qeth_query_ipassists_cb(struct qeth_card *card,
struct qeth_reply *reply, unsigned long data)
{
struct qeth_ipa_cmd *cmd;
QETH_CARD_TEXT(card, 2, "qipasscb");
cmd = (struct qeth_ipa_cmd *) data;
switch (cmd->hdr.return_code) {
case IPA_RC_SUCCESS:
break;
case IPA_RC_NOTSUPP:
case IPA_RC_L2_UNSUPPORTED_CMD:
QETH_CARD_TEXT(card, 2, "ipaunsup");
card->options.ipa4.supported |= IPA_SETADAPTERPARMS;
card->options.ipa6.supported |= IPA_SETADAPTERPARMS;
return -EOPNOTSUPP;
default:
QETH_DBF_MESSAGE(1, "IPA_CMD_QIPASSIST on device %x: Unhandled rc=%#x\n",
CARD_DEVID(card), cmd->hdr.return_code);
return -EIO;
}
if (cmd->hdr.prot_version == QETH_PROT_IPV4)
card->options.ipa4 = cmd->hdr.assists;
else if (cmd->hdr.prot_version == QETH_PROT_IPV6)
card->options.ipa6 = cmd->hdr.assists;
else
QETH_DBF_MESSAGE(1, "IPA_CMD_QIPASSIST on device %x: Flawed LIC detected\n",
CARD_DEVID(card));
return 0;
}
static int qeth_query_ipassists(struct qeth_card *card,
enum qeth_prot_versions prot)
{
int rc;
struct qeth_cmd_buffer *iob;
QETH_CARD_TEXT_(card, 2, "qipassi%i", prot);
iob = qeth_ipa_alloc_cmd(card, IPA_CMD_QIPASSIST, prot, 0);
if (!iob)
return -ENOMEM;
rc = qeth_send_ipa_cmd(card, iob, qeth_query_ipassists_cb, NULL);
return rc;
}
static int qeth_query_switch_attributes_cb(struct qeth_card *card,
struct qeth_reply *reply, unsigned long data)
{
struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
struct qeth_query_switch_attributes *attrs;
struct qeth_switch_info *sw_info;
QETH_CARD_TEXT(card, 2, "qswiatcb");
if (qeth_setadpparms_inspect_rc(cmd))
return -EIO;
sw_info = (struct qeth_switch_info *)reply->param;
attrs = &cmd->data.setadapterparms.data.query_switch_attributes;
sw_info->capabilities = attrs->capabilities;
sw_info->settings = attrs->settings;
QETH_CARD_TEXT_(card, 2, "%04x%04x", sw_info->capabilities,
sw_info->settings);
return 0;
}
int qeth_query_switch_attributes(struct qeth_card *card,
struct qeth_switch_info *sw_info)
{
struct qeth_cmd_buffer *iob;
QETH_CARD_TEXT(card, 2, "qswiattr");
if (!qeth_adp_supported(card, IPA_SETADP_QUERY_SWITCH_ATTRIBUTES))
return -EOPNOTSUPP;
if (!netif_carrier_ok(card->dev))
return -ENOMEDIUM;
iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_SWITCH_ATTRIBUTES, 0);
if (!iob)
return -ENOMEM;
return qeth_send_ipa_cmd(card, iob,
qeth_query_switch_attributes_cb, sw_info);
}
struct qeth_cmd_buffer *qeth_get_diag_cmd(struct qeth_card *card,
enum qeth_diags_cmds sub_cmd,
unsigned int data_length)
{
struct qeth_ipacmd_diagass *cmd;
struct qeth_cmd_buffer *iob;
iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SET_DIAG_ASS, QETH_PROT_NONE,
DIAG_HDR_LEN + data_length);
if (!iob)
return NULL;
cmd = &__ipa_cmd(iob)->data.diagass;
cmd->subcmd_len = DIAG_SUB_HDR_LEN + data_length;
cmd->subcmd = sub_cmd;
return iob;
}
EXPORT_SYMBOL_GPL(qeth_get_diag_cmd);
static int qeth_query_setdiagass_cb(struct qeth_card *card,
struct qeth_reply *reply, unsigned long data)
{
struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
u16 rc = cmd->hdr.return_code;
if (rc) {
QETH_CARD_TEXT_(card, 2, "diagq:%x", rc);
return -EIO;
}
card->info.diagass_support = cmd->data.diagass.ext;
return 0;
}
static int qeth_query_setdiagass(struct qeth_card *card)
{
struct qeth_cmd_buffer *iob;
QETH_CARD_TEXT(card, 2, "qdiagass");
iob = qeth_get_diag_cmd(card, QETH_DIAGS_CMD_QUERY, 0);
if (!iob)
return -ENOMEM;
return qeth_send_ipa_cmd(card, iob, qeth_query_setdiagass_cb, NULL);
}
static void qeth_get_trap_id(struct qeth_card *card, struct qeth_trap_id *tid)
{
unsigned long info = get_zeroed_page(GFP_KERNEL);
struct sysinfo_2_2_2 *info222 = (struct sysinfo_2_2_2 *)info;
struct sysinfo_3_2_2 *info322 = (struct sysinfo_3_2_2 *)info;
struct ccw_dev_id ccwid;
int level;
tid->chpid = card->info.chpid;
ccw_device_get_id(CARD_RDEV(card), &ccwid);
tid->ssid = ccwid.ssid;
tid->devno = ccwid.devno;
if (!info)
return;
level = stsi(NULL, 0, 0, 0);
if ((level >= 2) && (stsi(info222, 2, 2, 2) == 0))
tid->lparnr = info222->lpar_number;
if ((level >= 3) && (stsi(info322, 3, 2, 2) == 0)) {
EBCASC(info322->vm[0].name, sizeof(info322->vm[0].name));
memcpy(tid->vmname, info322->vm[0].name, sizeof(tid->vmname));
}
free_page(info);
return;
}
static int qeth_hw_trap_cb(struct qeth_card *card,
struct qeth_reply *reply, unsigned long data)
{
struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
u16 rc = cmd->hdr.return_code;
if (rc) {
QETH_CARD_TEXT_(card, 2, "trapc:%x", rc);
return -EIO;
}
return 0;
}
int qeth_hw_trap(struct qeth_card *card, enum qeth_diags_trap_action action)
{
struct qeth_cmd_buffer *iob;
struct qeth_ipa_cmd *cmd;
QETH_CARD_TEXT(card, 2, "diagtrap");
iob = qeth_get_diag_cmd(card, QETH_DIAGS_CMD_TRAP, 64);
if (!iob)
return -ENOMEM;
cmd = __ipa_cmd(iob);
cmd->data.diagass.type = 1;
cmd->data.diagass.action = action;
switch (action) {
case QETH_DIAGS_TRAP_ARM:
cmd->data.diagass.options = 0x0003;
cmd->data.diagass.ext = 0x00010000 +
sizeof(struct qeth_trap_id);
qeth_get_trap_id(card,
(struct qeth_trap_id *)cmd->data.diagass.cdata);
break;
case QETH_DIAGS_TRAP_DISARM:
cmd->data.diagass.options = 0x0001;
break;
case QETH_DIAGS_TRAP_CAPTURE:
break;
}
return qeth_send_ipa_cmd(card, iob, qeth_hw_trap_cb, NULL);
}
static int qeth_check_qdio_errors(struct qeth_card *card,
struct qdio_buffer *buf,
unsigned int qdio_error,
const char *dbftext)
{
if (qdio_error) {
QETH_CARD_TEXT(card, 2, dbftext);
QETH_CARD_TEXT_(card, 2, " F15=%02X",
buf->element[15].sflags);
QETH_CARD_TEXT_(card, 2, " F14=%02X",
buf->element[14].sflags);
QETH_CARD_TEXT_(card, 2, " qerr=%X", qdio_error);
if ((buf->element[15].sflags) == 0x12) {
QETH_CARD_STAT_INC(card, rx_fifo_errors);
return 0;
} else
return 1;
}
return 0;
}
static void qeth_queue_input_buffer(struct qeth_card *card, int index)
{
struct qeth_qdio_q *queue = card->qdio.in_q;
struct list_head *lh;
int count;
int i;
int rc;
int newcount = 0;
count = (index < queue->next_buf_to_init)?
card->qdio.in_buf_pool.buf_count -
(queue->next_buf_to_init - index) :
card->qdio.in_buf_pool.buf_count -
(queue->next_buf_to_init + QDIO_MAX_BUFFERS_PER_Q - index);
/* only requeue at a certain threshold to avoid SIGAs */
if (count >= QETH_IN_BUF_REQUEUE_THRESHOLD(card)) {
for (i = queue->next_buf_to_init;
i < queue->next_buf_to_init + count; ++i) {
if (qeth_init_input_buffer(card,
&queue->bufs[QDIO_BUFNR(i)])) {
break;
} else {
newcount++;
}
}
if (newcount < count) {
/* we are in memory shortage so we switch back to
traditional skb allocation and drop packages */
atomic_set(&card->force_alloc_skb, 3);
count = newcount;
} else {
atomic_add_unless(&card->force_alloc_skb, -1, 0);
}
if (!count) {
i = 0;
list_for_each(lh, &card->qdio.in_buf_pool.entry_list)
i++;
if (i == card->qdio.in_buf_pool.buf_count) {
QETH_CARD_TEXT(card, 2, "qsarbw");
card->reclaim_index = index;
schedule_delayed_work(
&card->buffer_reclaim_work,
QETH_RECLAIM_WORK_TIME);
}
return;
}
/*
* according to old code it should be avoided to requeue all
* 128 buffers in order to benefit from PCI avoidance.
* this function keeps at least one buffer (the buffer at
* 'index') un-requeued -> this buffer is the first buffer that
* will be requeued the next time
*/
rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, 0,
queue->next_buf_to_init, count);
if (rc) {
QETH_CARD_TEXT(card, 2, "qinberr");
}
queue->next_buf_to_init = QDIO_BUFNR(queue->next_buf_to_init +
count);
}
}
static void qeth_buffer_reclaim_work(struct work_struct *work)
{
struct qeth_card *card = container_of(work, struct qeth_card,
buffer_reclaim_work.work);
QETH_CARD_TEXT_(card, 2, "brw:%x", card->reclaim_index);
qeth_queue_input_buffer(card, card->reclaim_index);
}
static void qeth_handle_send_error(struct qeth_card *card,
struct qeth_qdio_out_buffer *buffer, unsigned int qdio_err)
{
int sbalf15 = buffer->buffer->element[15].sflags;
QETH_CARD_TEXT(card, 6, "hdsnderr");
qeth_check_qdio_errors(card, buffer->buffer, qdio_err, "qouterr");
if (!qdio_err)
return;
if ((sbalf15 >= 15) && (sbalf15 <= 31))
return;
QETH_CARD_TEXT(card, 1, "lnkfail");
QETH_CARD_TEXT_(card, 1, "%04x %02x",
(u16)qdio_err, (u8)sbalf15);
}
/**
* qeth_prep_flush_pack_buffer - Prepares flushing of a packing buffer.
* @queue: queue to check for packing buffer
*
* Returns number of buffers that were prepared for flush.
*/
static int qeth_prep_flush_pack_buffer(struct qeth_qdio_out_q *queue)
{
struct qeth_qdio_out_buffer *buffer;
buffer = queue->bufs[queue->next_buf_to_fill];
if ((atomic_read(&buffer->state) == QETH_QDIO_BUF_EMPTY) &&
(buffer->next_element_to_fill > 0)) {
/* it's a packing buffer */
atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
queue->next_buf_to_fill =
QDIO_BUFNR(queue->next_buf_to_fill + 1);
return 1;
}
return 0;
}
/*
* Switched to packing state if the number of used buffers on a queue
* reaches a certain limit.
*/
static void qeth_switch_to_packing_if_needed(struct qeth_qdio_out_q *queue)
{
if (!queue->do_pack) {
if (atomic_read(&queue->used_buffers)
>= QETH_HIGH_WATERMARK_PACK){
/* switch non-PACKING -> PACKING */
QETH_CARD_TEXT(queue->card, 6, "np->pack");
QETH_TXQ_STAT_INC(queue, packing_mode_switch);
queue->do_pack = 1;
}
}
}
/*
* Switches from packing to non-packing mode. If there is a packing
* buffer on the queue this buffer will be prepared to be flushed.
* In that case 1 is returned to inform the caller. If no buffer
* has to be flushed, zero is returned.
*/
static int qeth_switch_to_nonpacking_if_needed(struct qeth_qdio_out_q *queue)
{
if (queue->do_pack) {
if (atomic_read(&queue->used_buffers)
<= QETH_LOW_WATERMARK_PACK) {
/* switch PACKING -> non-PACKING */
QETH_CARD_TEXT(queue->card, 6, "pack->np");
QETH_TXQ_STAT_INC(queue, packing_mode_switch);
queue->do_pack = 0;
return qeth_prep_flush_pack_buffer(queue);
}
}
return 0;
}
static void qeth_flush_buffers(struct qeth_qdio_out_q *queue, int index,
int count)
{
struct qeth_qdio_out_buffer *buf = queue->bufs[index];
unsigned int qdio_flags = QDIO_FLAG_SYNC_OUTPUT;
struct qeth_card *card = queue->card;
int rc;
int i;
for (i = index; i < index + count; ++i) {
unsigned int bidx = QDIO_BUFNR(i);
struct sk_buff *skb;
buf = queue->bufs[bidx];
buf->buffer->element[buf->next_element_to_fill - 1].eflags |=
SBAL_EFLAGS_LAST_ENTRY;
queue->coalesced_frames += buf->frames;
if (queue->bufstates)
queue->bufstates[bidx].user = buf;
if (IS_IQD(card)) {
skb_queue_walk(&buf->skb_list, skb)
skb_tx_timestamp(skb);
}
}
if (!IS_IQD(card)) {
if (!queue->do_pack) {
if ((atomic_read(&queue->used_buffers) >=
(QETH_HIGH_WATERMARK_PACK -
QETH_WATERMARK_PACK_FUZZ)) &&
!atomic_read(&queue->set_pci_flags_count)) {
/* it's likely that we'll go to packing
* mode soon */
atomic_inc(&queue->set_pci_flags_count);
buf->buffer->element[0].sflags |= SBAL_SFLAGS0_PCI_REQ;
}
} else {
if (!atomic_read(&queue->set_pci_flags_count)) {
/*
* there's no outstanding PCI any more, so we
* have to request a PCI to be sure the the PCI
* will wake at some time in the future then we
* can flush packed buffers that might still be
* hanging around, which can happen if no
* further send was requested by the stack
*/
atomic_inc(&queue->set_pci_flags_count);
buf->buffer->element[0].sflags |= SBAL_SFLAGS0_PCI_REQ;
}
}
if (atomic_read(&queue->set_pci_flags_count))
qdio_flags |= QDIO_FLAG_PCI_OUT;
}
QETH_TXQ_STAT_INC(queue, doorbell);
rc = do_QDIO(CARD_DDEV(queue->card), qdio_flags,
queue->queue_no, index, count);
/* Fake the TX completion interrupt: */
if (IS_IQD(card)) {
unsigned int frames = READ_ONCE(queue->max_coalesced_frames);
unsigned int usecs = READ_ONCE(queue->coalesce_usecs);
if (frames && queue->coalesced_frames >= frames) {
napi_schedule(&queue->napi);
queue->coalesced_frames = 0;
QETH_TXQ_STAT_INC(queue, coal_frames);
} else if (usecs) {
qeth_tx_arm_timer(queue, usecs);
}
}
if (rc) {
/* ignore temporary SIGA errors without busy condition */
if (rc == -ENOBUFS)
return;
QETH_CARD_TEXT(queue->card, 2, "flushbuf");
QETH_CARD_TEXT_(queue->card, 2, " q%d", queue->queue_no);
QETH_CARD_TEXT_(queue->card, 2, " idx%d", index);
QETH_CARD_TEXT_(queue->card, 2, " c%d", count);
QETH_CARD_TEXT_(queue->card, 2, " err%d", rc);
/* this must not happen under normal circumstances. if it
* happens something is really wrong -> recover */
qeth_schedule_recovery(queue->card);
return;
}
}
static void qeth_flush_queue(struct qeth_qdio_out_q *queue)
{
qeth_flush_buffers(queue, queue->bulk_start, queue->bulk_count);
queue->bulk_start = QDIO_BUFNR(queue->bulk_start + queue->bulk_count);
queue->prev_hdr = NULL;
queue->bulk_count = 0;
}
static void qeth_check_outbound_queue(struct qeth_qdio_out_q *queue)
{
int index;
int flush_cnt = 0;
int q_was_packing = 0;
/*
* check if weed have to switch to non-packing mode or if
* we have to get a pci flag out on the queue
*/
if ((atomic_read(&queue->used_buffers) <= QETH_LOW_WATERMARK_PACK) ||
!atomic_read(&queue->set_pci_flags_count)) {
if (atomic_xchg(&queue->state, QETH_OUT_Q_LOCKED_FLUSH) ==
QETH_OUT_Q_UNLOCKED) {
/*
* If we get in here, there was no action in
* do_send_packet. So, we check if there is a
* packing buffer to be flushed here.
*/
index = queue->next_buf_to_fill;
q_was_packing = queue->do_pack;
/* queue->do_pack may change */
barrier();
flush_cnt += qeth_switch_to_nonpacking_if_needed(queue);
if (!flush_cnt &&
!atomic_read(&queue->set_pci_flags_count))
flush_cnt += qeth_prep_flush_pack_buffer(queue);
if (q_was_packing)
QETH_TXQ_STAT_ADD(queue, bufs_pack, flush_cnt);
if (flush_cnt)
qeth_flush_buffers(queue, index, flush_cnt);
atomic_set(&queue->state, QETH_OUT_Q_UNLOCKED);
}
}
}
static void qeth_qdio_poll(struct ccw_device *cdev, unsigned long card_ptr)
{
struct qeth_card *card = (struct qeth_card *)card_ptr;
napi_schedule_irqoff(&card->napi);
}
int qeth_configure_cq(struct qeth_card *card, enum qeth_cq cq)
{
int rc;
if (card->options.cq == QETH_CQ_NOTAVAILABLE) {
rc = -1;
goto out;
} else {
if (card->options.cq == cq) {
rc = 0;
goto out;
}
qeth_free_qdio_queues(card);
card->options.cq = cq;
rc = 0;
}
out:
return rc;
}
EXPORT_SYMBOL_GPL(qeth_configure_cq);
static void qeth_qdio_cq_handler(struct qeth_card *card, unsigned int qdio_err,
unsigned int queue, int first_element,
int count)
{
struct qeth_qdio_q *cq = card->qdio.c_q;
int i;
int rc;
QETH_CARD_TEXT_(card, 5, "qcqhe%d", first_element);
QETH_CARD_TEXT_(card, 5, "qcqhc%d", count);
QETH_CARD_TEXT_(card, 5, "qcqherr%d", qdio_err);
if (qdio_err) {
netif_tx_stop_all_queues(card->dev);
qeth_schedule_recovery(card);
return;
}
for (i = first_element; i < first_element + count; ++i) {
struct qdio_buffer *buffer = cq->qdio_bufs[QDIO_BUFNR(i)];
int e = 0;
while ((e < QDIO_MAX_ELEMENTS_PER_BUFFER) &&
buffer->element[e].addr) {
unsigned long phys_aob_addr = buffer->element[e].addr;
qeth_qdio_handle_aob(card, phys_aob_addr);
++e;
}
qeth_scrub_qdio_buffer(buffer, QDIO_MAX_ELEMENTS_PER_BUFFER);
}
rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, queue,
card->qdio.c_q->next_buf_to_init,
count);
if (rc) {
dev_warn(&card->gdev->dev,
"QDIO reported an error, rc=%i\n", rc);
QETH_CARD_TEXT(card, 2, "qcqherr");
}
cq->next_buf_to_init = QDIO_BUFNR(cq->next_buf_to_init + count);
}
static void qeth_qdio_input_handler(struct ccw_device *ccwdev,
unsigned int qdio_err, int queue,
int first_elem, int count,
unsigned long card_ptr)
{
struct qeth_card *card = (struct qeth_card *)card_ptr;
QETH_CARD_TEXT_(card, 2, "qihq%d", queue);
QETH_CARD_TEXT_(card, 2, "qiec%d", qdio_err);
if (qdio_err)
qeth_schedule_recovery(card);
}
static void qeth_qdio_output_handler(struct ccw_device *ccwdev,
unsigned int qdio_error, int __queue,
int first_element, int count,
unsigned long card_ptr)
{
struct qeth_card *card = (struct qeth_card *) card_ptr;
struct qeth_qdio_out_q *queue = card->qdio.out_qs[__queue];
struct net_device *dev = card->dev;
struct netdev_queue *txq;
int i;
QETH_CARD_TEXT(card, 6, "qdouhdl");
if (qdio_error & QDIO_ERROR_FATAL) {
QETH_CARD_TEXT(card, 2, "achkcond");
netif_tx_stop_all_queues(dev);
qeth_schedule_recovery(card);
return;
}
for (i = first_element; i < (first_element + count); ++i) {
struct qeth_qdio_out_buffer *buf = queue->bufs[QDIO_BUFNR(i)];
qeth_handle_send_error(card, buf, qdio_error);
qeth_clear_output_buffer(queue, buf, qdio_error, 0);
}
atomic_sub(count, &queue->used_buffers);
qeth_check_outbound_queue(queue);
txq = netdev_get_tx_queue(dev, __queue);
/* xmit may have observed the full-condition, but not yet stopped the
* txq. In which case the code below won't trigger. So before returning,
* xmit will re-check the txq's fill level and wake it up if needed.
*/
if (netif_tx_queue_stopped(txq) && !qeth_out_queue_is_full(queue))
netif_tx_wake_queue(txq);
}
/**
* Note: Function assumes that we have 4 outbound queues.
*/
int qeth_get_priority_queue(struct qeth_card *card, struct sk_buff *skb)
{
struct vlan_ethhdr *veth = vlan_eth_hdr(skb);
u8 tos;
switch (card->qdio.do_prio_queueing) {
case QETH_PRIO_Q_ING_TOS:
case QETH_PRIO_Q_ING_PREC:
switch (qeth_get_ip_version(skb)) {
case 4:
tos = ipv4_get_dsfield(ip_hdr(skb));
break;
case 6:
tos = ipv6_get_dsfield(ipv6_hdr(skb));
break;
default:
return card->qdio.default_out_queue;
}
if (card->qdio.do_prio_queueing == QETH_PRIO_Q_ING_PREC)
return ~tos >> 6 & 3;
if (tos & IPTOS_MINCOST)
return 3;
if (tos & IPTOS_RELIABILITY)
return 2;
if (tos & IPTOS_THROUGHPUT)
return 1;
if (tos & IPTOS_LOWDELAY)
return 0;
break;
case QETH_PRIO_Q_ING_SKB:
if (skb->priority > 5)
return 0;
return ~skb->priority >> 1 & 3;
case QETH_PRIO_Q_ING_VLAN:
if (veth->h_vlan_proto == htons(ETH_P_8021Q))
return ~ntohs(veth->h_vlan_TCI) >>
(VLAN_PRIO_SHIFT + 1) & 3;
break;
case QETH_PRIO_Q_ING_FIXED:
return card->qdio.default_out_queue;
default:
break;
}
return card->qdio.default_out_queue;
}
EXPORT_SYMBOL_GPL(qeth_get_priority_queue);
/**
* qeth_get_elements_for_frags() - find number of SBALEs for skb frags.
* @skb: SKB address
*
* Returns the number of pages, and thus QDIO buffer elements, needed to cover
* fragmented part of the SKB. Returns zero for linear SKB.
*/
static int qeth_get_elements_for_frags(struct sk_buff *skb)
{
int cnt, elements = 0;
for (cnt = 0; cnt < skb_shinfo(skb)->nr_frags; cnt++) {
skb_frag_t *frag = &skb_shinfo(skb)->frags[cnt];
elements += qeth_get_elements_for_range(
(addr_t)skb_frag_address(frag),
(addr_t)skb_frag_address(frag) + skb_frag_size(frag));
}
return elements;
}
/**
* qeth_count_elements() - Counts the number of QDIO buffer elements needed
* to transmit an skb.
* @skb: the skb to operate on.
* @data_offset: skip this part of the skb's linear data
*
* Returns the number of pages, and thus QDIO buffer elements, needed to map the
* skb's data (both its linear part and paged fragments).
*/
unsigned int qeth_count_elements(struct sk_buff *skb, unsigned int data_offset)
{
unsigned int elements = qeth_get_elements_for_frags(skb);
addr_t end = (addr_t)skb->data + skb_headlen(skb);
addr_t start = (addr_t)skb->data + data_offset;
if (start != end)
elements += qeth_get_elements_for_range(start, end);
return elements;
}
EXPORT_SYMBOL_GPL(qeth_count_elements);
#define QETH_HDR_CACHE_OBJ_SIZE (sizeof(struct qeth_hdr_tso) + \
MAX_TCP_HEADER)
/**
* qeth_add_hw_header() - add a HW header to an skb.
* @skb: skb that the HW header should be added to.
* @hdr: double pointer to a qeth_hdr. When returning with >= 0,
* it contains a valid pointer to a qeth_hdr.
* @hdr_len: length of the HW header.
* @proto_len: length of protocol headers that need to be in same page as the
* HW header.
*
* Returns the pushed length. If the header can't be pushed on
* (eg. because it would cross a page boundary), it is allocated from
* the cache instead and 0 is returned.
* The number of needed buffer elements is returned in @elements.
* Error to create the hdr is indicated by returning with < 0.
*/
static int qeth_add_hw_header(struct qeth_qdio_out_q *queue,
struct sk_buff *skb, struct qeth_hdr **hdr,
unsigned int hdr_len, unsigned int proto_len,
unsigned int *elements)
{
gfp_t gfp = GFP_ATOMIC | (skb_pfmemalloc(skb) ? __GFP_MEMALLOC : 0);
const unsigned int contiguous = proto_len ? proto_len : 1;
const unsigned int max_elements = queue->max_elements;
unsigned int __elements;
addr_t start, end;
bool push_ok;
int rc;
check_layout:
start = (addr_t)skb->data - hdr_len;
end = (addr_t)skb->data;
if (qeth_get_elements_for_range(start, end + contiguous) == 1) {
/* Push HW header into same page as first protocol header. */
push_ok = true;
/* ... but TSO always needs a separate element for headers: */
if (skb_is_gso(skb))
__elements = 1 + qeth_count_elements(skb, proto_len);
else
__elements = qeth_count_elements(skb, 0);
} else if (!proto_len && PAGE_ALIGNED(skb->data)) {
/* Push HW header into preceding page, flush with skb->data. */
push_ok = true;
__elements = 1 + qeth_count_elements(skb, 0);
} else {
/* Use header cache, copy protocol headers up. */
push_ok = false;
__elements = 1 + qeth_count_elements(skb, proto_len);
}
/* Compress skb to fit into one IO buffer: */
if (__elements > max_elements) {
if (!skb_is_nonlinear(skb)) {
/* Drop it, no easy way of shrinking it further. */
QETH_DBF_MESSAGE(2, "Dropped an oversized skb (Max Elements=%u / Actual=%u / Length=%u).\n",
max_elements, __elements, skb->len);
return -E2BIG;
}
rc = skb_linearize(skb);
if (rc) {
QETH_TXQ_STAT_INC(queue, skbs_linearized_fail);
return rc;
}
QETH_TXQ_STAT_INC(queue, skbs_linearized);
/* Linearization changed the layout, re-evaluate: */
goto check_layout;
}
*elements = __elements;
/* Add the header: */
if (push_ok) {
*hdr = skb_push(skb, hdr_len);
return hdr_len;
}
/* Fall back to cache element with known-good alignment: */
if (hdr_len + proto_len > QETH_HDR_CACHE_OBJ_SIZE)
return -E2BIG;
*hdr = kmem_cache_alloc(qeth_core_header_cache, gfp);
if (!*hdr)
return -ENOMEM;
/* Copy protocol headers behind HW header: */
skb_copy_from_linear_data(skb, ((char *)*hdr) + hdr_len, proto_len);
return 0;
}
static bool qeth_iqd_may_bulk(struct qeth_qdio_out_q *queue,
struct sk_buff *curr_skb,
struct qeth_hdr *curr_hdr)
{
struct qeth_qdio_out_buffer *buffer = queue->bufs[queue->bulk_start];
struct qeth_hdr *prev_hdr = queue->prev_hdr;
if (!prev_hdr)
return true;
/* All packets must have the same target: */
if (curr_hdr->hdr.l2.id == QETH_HEADER_TYPE_LAYER2) {
struct sk_buff *prev_skb = skb_peek(&buffer->skb_list);
return ether_addr_equal(eth_hdr(prev_skb)->h_dest,
eth_hdr(curr_skb)->h_dest) &&
qeth_l2_same_vlan(&prev_hdr->hdr.l2, &curr_hdr->hdr.l2);
}
return qeth_l3_same_next_hop(&prev_hdr->hdr.l3, &curr_hdr->hdr.l3) &&
qeth_l3_iqd_same_vlan(&prev_hdr->hdr.l3, &curr_hdr->hdr.l3);
}
/**
* qeth_fill_buffer() - map skb into an output buffer
* @buf: buffer to transport the skb
* @skb: skb to map into the buffer
* @hdr: qeth_hdr for this skb. Either at skb->data, or allocated
* from qeth_core_header_cache.
* @offset: when mapping the skb, start at skb->data + offset
* @hd_len: if > 0, build a dedicated header element of this size
*/
static unsigned int qeth_fill_buffer(struct qeth_qdio_out_buffer *buf,
struct sk_buff *skb, struct qeth_hdr *hdr,
unsigned int offset, unsigned int hd_len)
{
struct qdio_buffer *buffer = buf->buffer;
int element = buf->next_element_to_fill;
int length = skb_headlen(skb) - offset;
char *data = skb->data + offset;
unsigned int elem_length, cnt;
bool is_first_elem = true;
__skb_queue_tail(&buf->skb_list, skb);
/* build dedicated element for HW Header */
if (hd_len) {
is_first_elem = false;
buffer->element[element].addr = virt_to_phys(hdr);
buffer->element[element].length = hd_len;
buffer->element[element].eflags = SBAL_EFLAGS_FIRST_FRAG;
/* HW header is allocated from cache: */
if ((void *)hdr != skb->data)
buf->is_header[element] = 1;
/* HW header was pushed and is contiguous with linear part: */
else if (length > 0 && !PAGE_ALIGNED(data) &&
(data == (char *)hdr + hd_len))
buffer->element[element].eflags |=
SBAL_EFLAGS_CONTIGUOUS;
element++;
}
/* map linear part into buffer element(s) */
while (length > 0) {
elem_length = min_t(unsigned int, length,
PAGE_SIZE - offset_in_page(data));
buffer->element[element].addr = virt_to_phys(data);
buffer->element[element].length = elem_length;
length -= elem_length;
if (is_first_elem) {
is_first_elem = false;
if (length || skb_is_nonlinear(skb))
/* skb needs additional elements */
buffer->element[element].eflags =
SBAL_EFLAGS_FIRST_FRAG;
else
buffer->element[element].eflags = 0;
} else {
buffer->element[element].eflags =
SBAL_EFLAGS_MIDDLE_FRAG;
}
data += elem_length;
element++;
}
/* map page frags into buffer element(s) */
for (cnt = 0; cnt < skb_shinfo(skb)->nr_frags; cnt++) {
skb_frag_t *frag = &skb_shinfo(skb)->frags[cnt];
data = skb_frag_address(frag);
length = skb_frag_size(frag);
while (length > 0) {
elem_length = min_t(unsigned int, length,
PAGE_SIZE - offset_in_page(data));
buffer->element[element].addr = virt_to_phys(data);
buffer->element[element].length = elem_length;
buffer->element[element].eflags =
SBAL_EFLAGS_MIDDLE_FRAG;
length -= elem_length;
data += elem_length;
element++;
}
}
if (buffer->element[element - 1].eflags)
buffer->element[element - 1].eflags = SBAL_EFLAGS_LAST_FRAG;
buf->next_element_to_fill = element;
return element;
}
static int __qeth_xmit(struct qeth_card *card, struct qeth_qdio_out_q *queue,
struct sk_buff *skb, unsigned int elements,
struct qeth_hdr *hdr, unsigned int offset,
unsigned int hd_len)
{
unsigned int bytes = qdisc_pkt_len(skb);
struct qeth_qdio_out_buffer *buffer;
unsigned int next_element;
struct netdev_queue *txq;
bool stopped = false;
bool flush;
buffer = queue->bufs[QDIO_BUFNR(queue->bulk_start + queue->bulk_count)];
txq = netdev_get_tx_queue(card->dev, skb_get_queue_mapping(skb));
/* Just a sanity check, the wake/stop logic should ensure that we always
* get a free buffer.
*/
if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY)
return -EBUSY;
flush = !qeth_iqd_may_bulk(queue, skb, hdr);
if (flush ||
(buffer->next_element_to_fill + elements > queue->max_elements)) {
if (buffer->next_element_to_fill > 0) {
atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
queue->bulk_count++;
}
if (queue->bulk_count >= queue->bulk_max)
flush = true;
if (flush)
qeth_flush_queue(queue);
buffer = queue->bufs[QDIO_BUFNR(queue->bulk_start +
queue->bulk_count)];
/* Sanity-check again: */
if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY)
return -EBUSY;
}
if (buffer->next_element_to_fill == 0 &&
atomic_inc_return(&queue->used_buffers) >= QDIO_MAX_BUFFERS_PER_Q) {
/* If a TX completion happens right _here_ and misses to wake
* the txq, then our re-check below will catch the race.
*/
QETH_TXQ_STAT_INC(queue, stopped);
netif_tx_stop_queue(txq);
stopped = true;
}
next_element = qeth_fill_buffer(buffer, skb, hdr, offset, hd_len);
buffer->bytes += bytes;
buffer->frames += skb_is_gso(skb) ? skb_shinfo(skb)->gso_segs : 1;
queue->prev_hdr = hdr;
flush = __netdev_tx_sent_queue(txq, bytes,
!stopped && netdev_xmit_more());
if (flush || next_element >= queue->max_elements) {
atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
queue->bulk_count++;
if (queue->bulk_count >= queue->bulk_max)
flush = true;
if (flush)
qeth_flush_queue(queue);
}
if (stopped && !qeth_out_queue_is_full(queue))
netif_tx_start_queue(txq);
return 0;
}
int qeth_do_send_packet(struct qeth_card *card, struct qeth_qdio_out_q *queue,
struct sk_buff *skb, struct qeth_hdr *hdr,
unsigned int offset, unsigned int hd_len,
int elements_needed)
{
struct qeth_qdio_out_buffer *buffer;
unsigned int next_element;
struct netdev_queue *txq;
bool stopped = false;
int start_index;
int flush_count = 0;
int do_pack = 0;
int tmp;
int rc = 0;
/* spin until we get the queue ... */
while (atomic_cmpxchg(&queue->state, QETH_OUT_Q_UNLOCKED,
QETH_OUT_Q_LOCKED) != QETH_OUT_Q_UNLOCKED);
start_index = queue->next_buf_to_fill;
buffer = queue->bufs[queue->next_buf_to_fill];
/* Just a sanity check, the wake/stop logic should ensure that we always
* get a free buffer.
*/
if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY) {
atomic_set(&queue->state, QETH_OUT_Q_UNLOCKED);
return -EBUSY;
}
txq = netdev_get_tx_queue(card->dev, skb_get_queue_mapping(skb));
/* check if we need to switch packing state of this queue */
qeth_switch_to_packing_if_needed(queue);
if (queue->do_pack) {
do_pack = 1;
/* does packet fit in current buffer? */
if (buffer->next_element_to_fill + elements_needed >
queue->max_elements) {
/* ... no -> set state PRIMED */
atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
flush_count++;
queue->next_buf_to_fill =
QDIO_BUFNR(queue->next_buf_to_fill + 1);
buffer = queue->bufs[queue->next_buf_to_fill];
/* We stepped forward, so sanity-check again: */
if (atomic_read(&buffer->state) !=
QETH_QDIO_BUF_EMPTY) {
qeth_flush_buffers(queue, start_index,
flush_count);
atomic_set(&queue->state,
QETH_OUT_Q_UNLOCKED);
rc = -EBUSY;
goto out;
}
}
}
if (buffer->next_element_to_fill == 0 &&
atomic_inc_return(&queue->used_buffers) >= QDIO_MAX_BUFFERS_PER_Q) {
/* If a TX completion happens right _here_ and misses to wake
* the txq, then our re-check below will catch the race.
*/
QETH_TXQ_STAT_INC(queue, stopped);
netif_tx_stop_queue(txq);
stopped = true;
}
next_element = qeth_fill_buffer(buffer, skb, hdr, offset, hd_len);
buffer->bytes += qdisc_pkt_len(skb);
buffer->frames += skb_is_gso(skb) ? skb_shinfo(skb)->gso_segs : 1;
if (queue->do_pack)
QETH_TXQ_STAT_INC(queue, skbs_pack);
if (!queue->do_pack || stopped || next_element >= queue->max_elements) {
flush_count++;
atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
queue->next_buf_to_fill =
QDIO_BUFNR(queue->next_buf_to_fill + 1);
}
if (flush_count)
qeth_flush_buffers(queue, start_index, flush_count);
else if (!atomic_read(&queue->set_pci_flags_count))
atomic_xchg(&queue->state, QETH_OUT_Q_LOCKED_FLUSH);
/*
* queue->state will go from LOCKED -> UNLOCKED or from
* LOCKED_FLUSH -> LOCKED if output_handler wanted to 'notify' us
* (switch packing state or flush buffer to get another pci flag out).
* In that case we will enter this loop
*/
while (atomic_dec_return(&queue->state)) {
start_index = queue->next_buf_to_fill;
/* check if we can go back to non-packing state */
tmp = qeth_switch_to_nonpacking_if_needed(queue);
/*
* check if we need to flush a packing buffer to get a pci
* flag out on the queue
*/
if (!tmp && !atomic_read(&queue->set_pci_flags_count))
tmp = qeth_prep_flush_pack_buffer(queue);
if (tmp) {
qeth_flush_buffers(queue, start_index, tmp);
flush_count += tmp;
}
}
out:
/* at this point the queue is UNLOCKED again */
if (do_pack)
QETH_TXQ_STAT_ADD(queue, bufs_pack, flush_count);
if (stopped && !qeth_out_queue_is_full(queue))
netif_tx_start_queue(txq);
return rc;
}
EXPORT_SYMBOL_GPL(qeth_do_send_packet);
static void qeth_fill_tso_ext(struct qeth_hdr_tso *hdr,
unsigned int payload_len, struct sk_buff *skb,
unsigned int proto_len)
{
struct qeth_hdr_ext_tso *ext = &hdr->ext;
ext->hdr_tot_len = sizeof(*ext);
ext->imb_hdr_no = 1;
ext->hdr_type = 1;
ext->hdr_version = 1;
ext->hdr_len = 28;
ext->payload_len = payload_len;
ext->mss = skb_shinfo(skb)->gso_size;
ext->dg_hdr_len = proto_len;
}
int qeth_xmit(struct qeth_card *card, struct sk_buff *skb,
struct qeth_qdio_out_q *queue, int ipv,
void (*fill_header)(struct qeth_qdio_out_q *queue,
struct qeth_hdr *hdr, struct sk_buff *skb,
int ipv, unsigned int data_len))
{
unsigned int proto_len, hw_hdr_len;
unsigned int frame_len = skb->len;
bool is_tso = skb_is_gso(skb);
unsigned int data_offset = 0;
struct qeth_hdr *hdr = NULL;
unsigned int hd_len = 0;
unsigned int elements;
int push_len, rc;
if (is_tso) {
hw_hdr_len = sizeof(struct qeth_hdr_tso);
proto_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
} else {
hw_hdr_len = sizeof(struct qeth_hdr);
proto_len = (IS_IQD(card) && IS_LAYER2(card)) ? ETH_HLEN : 0;
}
rc = skb_cow_head(skb, hw_hdr_len);
if (rc)
return rc;
push_len = qeth_add_hw_header(queue, skb, &hdr, hw_hdr_len, proto_len,
&elements);
if (push_len < 0)
return push_len;
if (is_tso || !push_len) {
/* HW header needs its own buffer element. */
hd_len = hw_hdr_len + proto_len;
data_offset = push_len + proto_len;
}
memset(hdr, 0, hw_hdr_len);
fill_header(queue, hdr, skb, ipv, frame_len);
if (is_tso)
qeth_fill_tso_ext((struct qeth_hdr_tso *) hdr,
frame_len - proto_len, skb, proto_len);
if (IS_IQD(card)) {
rc = __qeth_xmit(card, queue, skb, elements, hdr, data_offset,
hd_len);
} else {
/* TODO: drop skb_orphan() once TX completion is fast enough */
skb_orphan(skb);
rc = qeth_do_send_packet(card, queue, skb, hdr, data_offset,
hd_len, elements);
}
if (rc && !push_len)
kmem_cache_free(qeth_core_header_cache, hdr);
return rc;
}
EXPORT_SYMBOL_GPL(qeth_xmit);
static int qeth_setadp_promisc_mode_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_setadpparms *setparms;
QETH_CARD_TEXT(card, 4, "prmadpcb");
setparms = &(cmd->data.setadapterparms);
if (qeth_setadpparms_inspect_rc(cmd)) {
QETH_CARD_TEXT_(card, 4, "prmrc%x", cmd->hdr.return_code);
setparms->data.mode = SET_PROMISC_MODE_OFF;
}
card->info.promisc_mode = setparms->data.mode;
return (cmd->hdr.return_code) ? -EIO : 0;
}
void qeth_setadp_promisc_mode(struct qeth_card *card, bool enable)
{
enum qeth_ipa_promisc_modes mode = enable ? SET_PROMISC_MODE_ON :
SET_PROMISC_MODE_OFF;
struct qeth_cmd_buffer *iob;
struct qeth_ipa_cmd *cmd;
QETH_CARD_TEXT(card, 4, "setprom");
QETH_CARD_TEXT_(card, 4, "mode:%x", mode);
iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_PROMISC_MODE,
SETADP_DATA_SIZEOF(mode));
if (!iob)
return;
cmd = __ipa_cmd(iob);
cmd->data.setadapterparms.data.mode = mode;
qeth_send_ipa_cmd(card, iob, qeth_setadp_promisc_mode_cb, NULL);
}
EXPORT_SYMBOL_GPL(qeth_setadp_promisc_mode);
static int qeth_setadpparms_change_macaddr_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_setadpparms *adp_cmd;
QETH_CARD_TEXT(card, 4, "chgmaccb");
if (qeth_setadpparms_inspect_rc(cmd))
return -EIO;
adp_cmd = &cmd->data.setadapterparms;
if (!is_valid_ether_addr(adp_cmd->data.change_addr.addr))
return -EADDRNOTAVAIL;
if (IS_LAYER2(card) && IS_OSD(card) && !IS_VM_NIC(card) &&
!(adp_cmd->hdr.flags & QETH_SETADP_FLAGS_VIRTUAL_MAC))
return -EADDRNOTAVAIL;
ether_addr_copy(card->dev->dev_addr, adp_cmd->data.change_addr.addr);
return 0;
}
int qeth_setadpparms_change_macaddr(struct qeth_card *card)
{
int rc;
struct qeth_cmd_buffer *iob;
struct qeth_ipa_cmd *cmd;
QETH_CARD_TEXT(card, 4, "chgmac");
iob = qeth_get_adapter_cmd(card, IPA_SETADP_ALTER_MAC_ADDRESS,
SETADP_DATA_SIZEOF(change_addr));
if (!iob)
return -ENOMEM;
cmd = __ipa_cmd(iob);
cmd->data.setadapterparms.data.change_addr.cmd = CHANGE_ADDR_READ_MAC;
cmd->data.setadapterparms.data.change_addr.addr_size = ETH_ALEN;
ether_addr_copy(cmd->data.setadapterparms.data.change_addr.addr,
card->dev->dev_addr);
rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_change_macaddr_cb,
NULL);
return rc;
}
EXPORT_SYMBOL_GPL(qeth_setadpparms_change_macaddr);
static int qeth_setadpparms_set_access_ctrl_cb(struct qeth_card *card,
struct qeth_reply *reply, unsigned long data)
{
struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
struct qeth_set_access_ctrl *access_ctrl_req;
int fallback = *(int *)reply->param;
QETH_CARD_TEXT(card, 4, "setaccb");
if (cmd->hdr.return_code)
return -EIO;
qeth_setadpparms_inspect_rc(cmd);
access_ctrl_req = &cmd->data.setadapterparms.data.set_access_ctrl;
QETH_CARD_TEXT_(card, 2, "rc=%d",
cmd->data.setadapterparms.hdr.return_code);
if (cmd->data.setadapterparms.hdr.return_code !=
SET_ACCESS_CTRL_RC_SUCCESS)
QETH_DBF_MESSAGE(3, "ERR:SET_ACCESS_CTRL(%#x) on device %x: %#x\n",
access_ctrl_req->subcmd_code, CARD_DEVID(card),
cmd->data.setadapterparms.hdr.return_code);
switch (cmd->data.setadapterparms.hdr.return_code) {
case SET_ACCESS_CTRL_RC_SUCCESS:
if (card->options.isolation == ISOLATION_MODE_NONE) {
dev_info(&card->gdev->dev,
"QDIO data connection isolation is deactivated\n");
} else {
dev_info(&card->gdev->dev,
"QDIO data connection isolation is activated\n");
}
break;
case SET_ACCESS_CTRL_RC_ALREADY_NOT_ISOLATED:
QETH_DBF_MESSAGE(2, "QDIO data connection isolation on device %x already deactivated\n",
CARD_DEVID(card));
if (fallback)
card->options.isolation = card->options.prev_isolation;
break;
case SET_ACCESS_CTRL_RC_ALREADY_ISOLATED:
QETH_DBF_MESSAGE(2, "QDIO data connection isolation on device %x already activated\n",
CARD_DEVID(card));
if (fallback)
card->options.isolation = card->options.prev_isolation;
break;
case SET_ACCESS_CTRL_RC_NOT_SUPPORTED:
dev_err(&card->gdev->dev, "Adapter does not "
"support QDIO data connection isolation\n");
break;
case SET_ACCESS_CTRL_RC_NONE_SHARED_ADAPTER:
dev_err(&card->gdev->dev,
"Adapter is dedicated. "
"QDIO data connection isolation not supported\n");
if (fallback)
card->options.isolation = card->options.prev_isolation;
break;
case SET_ACCESS_CTRL_RC_ACTIVE_CHECKSUM_OFF:
dev_err(&card->gdev->dev,
"TSO does not permit QDIO data connection isolation\n");
if (fallback)
card->options.isolation = card->options.prev_isolation;
break;
case SET_ACCESS_CTRL_RC_REFLREL_UNSUPPORTED:
dev_err(&card->gdev->dev, "The adjacent switch port does not "
"support reflective relay mode\n");
if (fallback)
card->options.isolation = card->options.prev_isolation;
break;
case SET_ACCESS_CTRL_RC_REFLREL_FAILED:
dev_err(&card->gdev->dev, "The reflective relay mode cannot be "
"enabled at the adjacent switch port");
if (fallback)
card->options.isolation = card->options.prev_isolation;
break;
case SET_ACCESS_CTRL_RC_REFLREL_DEACT_FAILED:
dev_warn(&card->gdev->dev, "Turning off reflective relay mode "
"at the adjacent switch failed\n");
break;
default:
/* this should never happen */
if (fallback)
card->options.isolation = card->options.prev_isolation;
break;
}
return (cmd->hdr.return_code) ? -EIO : 0;
}
static int qeth_setadpparms_set_access_ctrl(struct qeth_card *card,
enum qeth_ipa_isolation_modes isolation, int fallback)
{
int rc;
struct qeth_cmd_buffer *iob;
struct qeth_ipa_cmd *cmd;
struct qeth_set_access_ctrl *access_ctrl_req;
QETH_CARD_TEXT(card, 4, "setacctl");
iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_ACCESS_CONTROL,
SETADP_DATA_SIZEOF(set_access_ctrl));
if (!iob)
return -ENOMEM;
cmd = __ipa_cmd(iob);
access_ctrl_req = &cmd->data.setadapterparms.data.set_access_ctrl;
access_ctrl_req->subcmd_code = isolation;
rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_set_access_ctrl_cb,
&fallback);
QETH_CARD_TEXT_(card, 2, "rc=%d", rc);
return rc;
}
int qeth_set_access_ctrl_online(struct qeth_card *card, int fallback)
{
int rc = 0;
QETH_CARD_TEXT(card, 4, "setactlo");
if ((IS_OSD(card) || IS_OSX(card)) &&
qeth_adp_supported(card, IPA_SETADP_SET_ACCESS_CONTROL)) {
rc = qeth_setadpparms_set_access_ctrl(card,
card->options.isolation, fallback);
if (rc) {
QETH_DBF_MESSAGE(3, "IPA(SET_ACCESS_CTRL(%d) on device %x: sent failed\n",
rc, CARD_DEVID(card));
rc = -EOPNOTSUPP;
}
} else if (card->options.isolation != ISOLATION_MODE_NONE) {
card->options.isolation = ISOLATION_MODE_NONE;
dev_err(&card->gdev->dev, "Adapter does not "
"support QDIO data connection isolation\n");
rc = -EOPNOTSUPP;
}
return rc;
}
void qeth_tx_timeout(struct net_device *dev, unsigned int txqueue)
{
struct qeth_card *card;
card = dev->ml_priv;
QETH_CARD_TEXT(card, 4, "txtimeo");
qeth_schedule_recovery(card);
}
EXPORT_SYMBOL_GPL(qeth_tx_timeout);
static int qeth_mdio_read(struct net_device *dev, int phy_id, int regnum)
{
struct qeth_card *card = dev->ml_priv;
int rc = 0;
switch (regnum) {
case MII_BMCR: /* Basic mode control register */
rc = BMCR_FULLDPLX;
if ((card->info.link_type != QETH_LINK_TYPE_GBIT_ETH) &&
(card->info.link_type != QETH_LINK_TYPE_OSN) &&
(card->info.link_type != QETH_LINK_TYPE_10GBIT_ETH) &&
(card->info.link_type != QETH_LINK_TYPE_25GBIT_ETH))
rc |= BMCR_SPEED100;
break;
case MII_BMSR: /* Basic mode status register */
rc = BMSR_ERCAP | BMSR_ANEGCOMPLETE | BMSR_LSTATUS |
BMSR_10HALF | BMSR_10FULL | BMSR_100HALF | BMSR_100FULL |
BMSR_100BASE4;
break;
case MII_PHYSID1: /* PHYS ID 1 */
rc = (dev->dev_addr[0] << 16) | (dev->dev_addr[1] << 8) |
dev->dev_addr[2];
rc = (rc >> 5) & 0xFFFF;
break;
case MII_PHYSID2: /* PHYS ID 2 */
rc = (dev->dev_addr[2] << 10) & 0xFFFF;
break;
case MII_ADVERTISE: /* Advertisement control reg */
rc = ADVERTISE_ALL;
break;
case MII_LPA: /* Link partner ability reg */
rc = LPA_10HALF | LPA_10FULL | LPA_100HALF | LPA_100FULL |
LPA_100BASE4 | LPA_LPACK;
break;
case MII_EXPANSION: /* Expansion register */
break;
case MII_DCOUNTER: /* disconnect counter */
break;
case MII_FCSCOUNTER: /* false carrier counter */
break;
case MII_NWAYTEST: /* N-way auto-neg test register */
break;
case MII_RERRCOUNTER: /* rx error counter */
rc = card->stats.rx_length_errors +
card->stats.rx_frame_errors +
card->stats.rx_fifo_errors;
break;
case MII_SREVISION: /* silicon revision */
break;
case MII_RESV1: /* reserved 1 */
break;
case MII_LBRERROR: /* loopback, rx, bypass error */
break;
case MII_PHYADDR: /* physical address */
break;
case MII_RESV2: /* reserved 2 */
break;
case MII_TPISTATUS: /* TPI status for 10mbps */
break;
case MII_NCONFIG: /* network interface config */
break;
default:
break;
}
return rc;
}
static int qeth_snmp_command_cb(struct qeth_card *card,
struct qeth_reply *reply, unsigned long data)
{
struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
struct qeth_arp_query_info *qinfo = reply->param;
struct qeth_ipacmd_setadpparms *adp_cmd;
unsigned int data_len;
void *snmp_data;
QETH_CARD_TEXT(card, 3, "snpcmdcb");
if (cmd->hdr.return_code) {
QETH_CARD_TEXT_(card, 4, "scer1%x", cmd->hdr.return_code);
return -EIO;
}
if (cmd->data.setadapterparms.hdr.return_code) {
cmd->hdr.return_code =
cmd->data.setadapterparms.hdr.return_code;
QETH_CARD_TEXT_(card, 4, "scer2%x", cmd->hdr.return_code);
return -EIO;
}
adp_cmd = &cmd->data.setadapterparms;
data_len = adp_cmd->hdr.cmdlength - sizeof(adp_cmd->hdr);
if (adp_cmd->hdr.seq_no == 1) {
snmp_data = &adp_cmd->data.snmp;
} else {
snmp_data = &adp_cmd->data.snmp.request;
data_len -= offsetof(struct qeth_snmp_cmd, request);
}
/* check if there is enough room in userspace */
if ((qinfo->udata_len - qinfo->udata_offset) < data_len) {
QETH_CARD_TEXT_(card, 4, "scer3%i", -ENOSPC);
return -ENOSPC;
}
QETH_CARD_TEXT_(card, 4, "snore%i",
cmd->data.setadapterparms.hdr.used_total);
QETH_CARD_TEXT_(card, 4, "sseqn%i",
cmd->data.setadapterparms.hdr.seq_no);
/*copy entries to user buffer*/
memcpy(qinfo->udata + qinfo->udata_offset, snmp_data, data_len);
qinfo->udata_offset += data_len;
if (cmd->data.setadapterparms.hdr.seq_no <
cmd->data.setadapterparms.hdr.used_total)
return 1;
return 0;
}
static int qeth_snmp_command(struct qeth_card *card, char __user *udata)
{
struct qeth_snmp_ureq __user *ureq;
struct qeth_cmd_buffer *iob;
unsigned int req_len;
struct qeth_arp_query_info qinfo = {0, };
int rc = 0;
QETH_CARD_TEXT(card, 3, "snmpcmd");
if (IS_VM_NIC(card))
return -EOPNOTSUPP;
if ((!qeth_adp_supported(card, IPA_SETADP_SET_SNMP_CONTROL)) &&
IS_LAYER3(card))
return -EOPNOTSUPP;
ureq = (struct qeth_snmp_ureq __user *) udata;
if (get_user(qinfo.udata_len, &ureq->hdr.data_len) ||
get_user(req_len, &ureq->hdr.req_len))
return -EFAULT;
/* Sanitize user input, to avoid overflows in iob size calculation: */
if (req_len > QETH_BUFSIZE)
return -EINVAL;
iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_SNMP_CONTROL, req_len);
if (!iob)
return -ENOMEM;
if (copy_from_user(&__ipa_cmd(iob)->data.setadapterparms.data.snmp,
&ureq->cmd, req_len)) {
qeth_put_cmd(iob);
return -EFAULT;
}
qinfo.udata = kzalloc(qinfo.udata_len, GFP_KERNEL);
if (!qinfo.udata) {
qeth_put_cmd(iob);
return -ENOMEM;
}
qinfo.udata_offset = sizeof(struct qeth_snmp_ureq_hdr);
rc = qeth_send_ipa_cmd(card, iob, qeth_snmp_command_cb, &qinfo);
if (rc)
QETH_DBF_MESSAGE(2, "SNMP command failed on device %x: (%#x)\n",
CARD_DEVID(card), rc);
else {
if (copy_to_user(udata, qinfo.udata, qinfo.udata_len))
rc = -EFAULT;
}
kfree(qinfo.udata);
return rc;
}
static int qeth_setadpparms_query_oat_cb(struct qeth_card *card,
struct qeth_reply *reply, unsigned long data)
{
struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
struct qeth_qoat_priv *priv;
char *resdata;
int resdatalen;
QETH_CARD_TEXT(card, 3, "qoatcb");
if (qeth_setadpparms_inspect_rc(cmd))
return -EIO;
priv = (struct qeth_qoat_priv *)reply->param;
resdatalen = cmd->data.setadapterparms.hdr.cmdlength;
resdata = (char *)data + 28;
if (resdatalen > (priv->buffer_len - priv->response_len))
return -ENOSPC;
memcpy((priv->buffer + priv->response_len), resdata,
resdatalen);
priv->response_len += resdatalen;
if (cmd->data.setadapterparms.hdr.seq_no <
cmd->data.setadapterparms.hdr.used_total)
return 1;
return 0;
}
static int qeth_query_oat_command(struct qeth_card *card, char __user *udata)
{
int rc = 0;
struct qeth_cmd_buffer *iob;
struct qeth_ipa_cmd *cmd;
struct qeth_query_oat *oat_req;
struct qeth_query_oat_data oat_data;
struct qeth_qoat_priv priv;
void __user *tmp;
QETH_CARD_TEXT(card, 3, "qoatcmd");
if (!qeth_adp_supported(card, IPA_SETADP_QUERY_OAT)) {
rc = -EOPNOTSUPP;
goto out;
}
if (copy_from_user(&oat_data, udata,
sizeof(struct qeth_query_oat_data))) {
rc = -EFAULT;
goto out;
}
priv.buffer_len = oat_data.buffer_len;
priv.response_len = 0;
priv.buffer = vzalloc(oat_data.buffer_len);
if (!priv.buffer) {
rc = -ENOMEM;
goto out;
}
iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_OAT,
SETADP_DATA_SIZEOF(query_oat));
if (!iob) {
rc = -ENOMEM;
goto out_free;
}
cmd = __ipa_cmd(iob);
oat_req = &cmd->data.setadapterparms.data.query_oat;
oat_req->subcmd_code = oat_data.command;
rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_query_oat_cb,
&priv);
if (!rc) {
if (is_compat_task())
tmp = compat_ptr(oat_data.ptr);
else
tmp = (void __user *)(unsigned long)oat_data.ptr;
if (copy_to_user(tmp, priv.buffer,
priv.response_len)) {
rc = -EFAULT;
goto out_free;
}
oat_data.response_len = priv.response_len;
if (copy_to_user(udata, &oat_data,
sizeof(struct qeth_query_oat_data)))
rc = -EFAULT;
}
out_free:
vfree(priv.buffer);
out:
return rc;
}
static int qeth_query_card_info_cb(struct qeth_card *card,
struct qeth_reply *reply, unsigned long data)
{
struct carrier_info *carrier_info = (struct carrier_info *)reply->param;
struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
struct qeth_query_card_info *card_info;
QETH_CARD_TEXT(card, 2, "qcrdincb");
if (qeth_setadpparms_inspect_rc(cmd))
return -EIO;
card_info = &cmd->data.setadapterparms.data.card_info;
carrier_info->card_type = card_info->card_type;
carrier_info->port_mode = card_info->port_mode;
carrier_info->port_speed = card_info->port_speed;
return 0;
}
int qeth_query_card_info(struct qeth_card *card,
struct carrier_info *carrier_info)
{
struct qeth_cmd_buffer *iob;
QETH_CARD_TEXT(card, 2, "qcrdinfo");
if (!qeth_adp_supported(card, IPA_SETADP_QUERY_CARD_INFO))
return -EOPNOTSUPP;
iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_CARD_INFO, 0);
if (!iob)
return -ENOMEM;
return qeth_send_ipa_cmd(card, iob, qeth_query_card_info_cb,
(void *)carrier_info);
}
/**
* qeth_vm_request_mac() - Request a hypervisor-managed MAC address
* @card: pointer to a qeth_card
*
* Returns
* 0, if a MAC address has been set for the card's netdevice
* a return code, for various error conditions
*/
int qeth_vm_request_mac(struct qeth_card *card)
{
struct diag26c_mac_resp *response;
struct diag26c_mac_req *request;
struct ccw_dev_id id;
int rc;
QETH_CARD_TEXT(card, 2, "vmreqmac");
request = kzalloc(sizeof(*request), GFP_KERNEL | GFP_DMA);
response = kzalloc(sizeof(*response), GFP_KERNEL | GFP_DMA);
if (!request || !response) {
rc = -ENOMEM;
goto out;
}
ccw_device_get_id(CARD_DDEV(card), &id);
request->resp_buf_len = sizeof(*response);
request->resp_version = DIAG26C_VERSION2;
request->op_code = DIAG26C_GET_MAC;
request->devno = id.devno;
QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
rc = diag26c(request, response, DIAG26C_MAC_SERVICES);
QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
if (rc)
goto out;
QETH_DBF_HEX(CTRL, 2, response, sizeof(*response));
if (request->resp_buf_len < sizeof(*response) ||
response->version != request->resp_version) {
rc = -EIO;
QETH_CARD_TEXT(card, 2, "badresp");
QETH_CARD_HEX(card, 2, &request->resp_buf_len,
sizeof(request->resp_buf_len));
} else if (!is_valid_ether_addr(response->mac)) {
rc = -EINVAL;
QETH_CARD_TEXT(card, 2, "badmac");
QETH_CARD_HEX(card, 2, response->mac, ETH_ALEN);
} else {
ether_addr_copy(card->dev->dev_addr, response->mac);
}
out:
kfree(response);
kfree(request);
return rc;
}
EXPORT_SYMBOL_GPL(qeth_vm_request_mac);
static void qeth_determine_capabilities(struct qeth_card *card)
{
struct qeth_channel *channel = &card->data;
struct ccw_device *ddev = channel->ccwdev;
int rc;
int ddev_offline = 0;
QETH_CARD_TEXT(card, 2, "detcapab");
if (!ddev->online) {
ddev_offline = 1;
rc = qeth_start_channel(channel);
if (rc) {
QETH_CARD_TEXT_(card, 2, "3err%d", rc);
goto out;
}
}
rc = qeth_read_conf_data(card);
if (rc) {
QETH_DBF_MESSAGE(2, "qeth_read_conf_data on device %x returned %i\n",
CARD_DEVID(card), rc);
QETH_CARD_TEXT_(card, 2, "5err%d", rc);
goto out_offline;
}
rc = qdio_get_ssqd_desc(ddev, &card->ssqd);
if (rc)
QETH_CARD_TEXT_(card, 2, "6err%d", rc);
QETH_CARD_TEXT_(card, 2, "qfmt%d", card->ssqd.qfmt);
QETH_CARD_TEXT_(card, 2, "ac1:%02x", card->ssqd.qdioac1);
QETH_CARD_TEXT_(card, 2, "ac2:%04x", card->ssqd.qdioac2);
QETH_CARD_TEXT_(card, 2, "ac3:%04x", card->ssqd.qdioac3);
QETH_CARD_TEXT_(card, 2, "icnt%d", card->ssqd.icnt);
if (!((card->ssqd.qfmt != QDIO_IQDIO_QFMT) ||
((card->ssqd.qdioac1 & CHSC_AC1_INITIATE_INPUTQ) == 0) ||
((card->ssqd.qdioac3 & CHSC_AC3_FORMAT2_CQ_AVAILABLE) == 0))) {
dev_info(&card->gdev->dev,
"Completion Queueing supported\n");
} else {
card->options.cq = QETH_CQ_NOTAVAILABLE;
}
out_offline:
if (ddev_offline == 1)
qeth_stop_channel(channel);
out:
return;
}
static int qeth_qdio_establish(struct qeth_card *card)
{
struct qdio_buffer **out_sbal_ptrs[QETH_MAX_OUT_QUEUES];
struct qdio_buffer **in_sbal_ptrs[QETH_MAX_IN_QUEUES];
struct qdio_initialize init_data;
char *qib_param_field;
unsigned int i;
int rc = 0;
QETH_CARD_TEXT(card, 2, "qdioest");
qib_param_field = kzalloc(sizeof_field(struct qib, parm), GFP_KERNEL);
if (!qib_param_field) {
rc = -ENOMEM;
goto out_free_nothing;
}
qeth_create_qib_param_field(card, qib_param_field);
qeth_create_qib_param_field_blkt(card, qib_param_field);
in_sbal_ptrs[0] = card->qdio.in_q->qdio_bufs;
if (card->options.cq == QETH_CQ_ENABLED)
in_sbal_ptrs[1] = card->qdio.c_q->qdio_bufs;
for (i = 0; i < card->qdio.no_out_queues; i++)
out_sbal_ptrs[i] = card->qdio.out_qs[i]->qdio_bufs;
memset(&init_data, 0, sizeof(struct qdio_initialize));
init_data.q_format = IS_IQD(card) ? QDIO_IQDIO_QFMT :
QDIO_QETH_QFMT;
init_data.qib_param_field_format = 0;
init_data.qib_param_field = qib_param_field;
init_data.no_input_qs = card->qdio.no_in_queues;
init_data.no_output_qs = card->qdio.no_out_queues;
init_data.input_handler = qeth_qdio_input_handler;
init_data.output_handler = qeth_qdio_output_handler;
init_data.irq_poll = qeth_qdio_poll;
init_data.int_parm = (unsigned long) card;
init_data.input_sbal_addr_array = in_sbal_ptrs;
init_data.output_sbal_addr_array = out_sbal_ptrs;
init_data.output_sbal_state_array = card->qdio.out_bufstates;
init_data.scan_threshold = IS_IQD(card) ? 0 : 32;
if (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_ALLOCATED,
QETH_QDIO_ESTABLISHED) == QETH_QDIO_ALLOCATED) {
rc = qdio_allocate(CARD_DDEV(card), init_data.no_input_qs,
init_data.no_output_qs);
if (rc) {
atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
goto out;
}
rc = qdio_establish(CARD_DDEV(card), &init_data);
if (rc) {
atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
qdio_free(CARD_DDEV(card));
}
}
switch (card->options.cq) {
case QETH_CQ_ENABLED:
dev_info(&card->gdev->dev, "Completion Queue support enabled");
break;
case QETH_CQ_DISABLED:
dev_info(&card->gdev->dev, "Completion Queue support disabled");
break;
default:
break;
}
out:
kfree(qib_param_field);
out_free_nothing:
return rc;
}
static void qeth_core_free_card(struct qeth_card *card)
{
QETH_CARD_TEXT(card, 2, "freecrd");
unregister_service_level(&card->qeth_service_level);
debugfs_remove_recursive(card->debugfs);
qeth_put_cmd(card->read_cmd);
destroy_workqueue(card->event_wq);
dev_set_drvdata(&card->gdev->dev, NULL);
kfree(card);
}
void qeth_trace_features(struct qeth_card *card)
{
QETH_CARD_TEXT(card, 2, "features");
QETH_CARD_HEX(card, 2, &card->options.ipa4, sizeof(card->options.ipa4));
QETH_CARD_HEX(card, 2, &card->options.ipa6, sizeof(card->options.ipa6));
QETH_CARD_HEX(card, 2, &card->options.adp, sizeof(card->options.adp));
QETH_CARD_HEX(card, 2, &card->info.diagass_support,
sizeof(card->info.diagass_support));
}
EXPORT_SYMBOL_GPL(qeth_trace_features);
static struct ccw_device_id qeth_ids[] = {
{CCW_DEVICE_DEVTYPE(0x1731, 0x01, 0x1732, 0x01),
.driver_info = QETH_CARD_TYPE_OSD},
{CCW_DEVICE_DEVTYPE(0x1731, 0x05, 0x1732, 0x05),
.driver_info = QETH_CARD_TYPE_IQD},
#ifdef CONFIG_QETH_OSN
{CCW_DEVICE_DEVTYPE(0x1731, 0x06, 0x1732, 0x06),
.driver_info = QETH_CARD_TYPE_OSN},
#endif
{CCW_DEVICE_DEVTYPE(0x1731, 0x02, 0x1732, 0x03),
.driver_info = QETH_CARD_TYPE_OSM},
#ifdef CONFIG_QETH_OSX
{CCW_DEVICE_DEVTYPE(0x1731, 0x02, 0x1732, 0x02),
.driver_info = QETH_CARD_TYPE_OSX},
#endif
{},
};
MODULE_DEVICE_TABLE(ccw, qeth_ids);
static struct ccw_driver qeth_ccw_driver = {
.driver = {
.owner = THIS_MODULE,
.name = "qeth",
},
.ids = qeth_ids,
.probe = ccwgroup_probe_ccwdev,
.remove = ccwgroup_remove_ccwdev,
};
int qeth_core_hardsetup_card(struct qeth_card *card, bool *carrier_ok)
{
int retries = 3;
int rc;
QETH_CARD_TEXT(card, 2, "hrdsetup");
atomic_set(&card->force_alloc_skb, 0);
rc = qeth_update_from_chp_desc(card);
if (rc)
return rc;
retry:
if (retries < 3)
QETH_DBF_MESSAGE(2, "Retrying to do IDX activates on device %x.\n",
CARD_DEVID(card));
rc = qeth_qdio_clear_card(card, !IS_IQD(card));
qeth_stop_channel(&card->data);
qeth_stop_channel(&card->write);
qeth_stop_channel(&card->read);
qdio_free(CARD_DDEV(card));
rc = qeth_start_channel(&card->read);
if (rc)
goto retriable;
rc = qeth_start_channel(&card->write);
if (rc)
goto retriable;
rc = qeth_start_channel(&card->data);
if (rc)
goto retriable;
retriable:
if (rc == -ERESTARTSYS) {
QETH_CARD_TEXT(card, 2, "break1");
return rc;
} else if (rc) {
QETH_CARD_TEXT_(card, 2, "1err%d", rc);
if (--retries < 0)
goto out;
else
goto retry;
}
qeth_determine_capabilities(card);
qeth_idx_init(card);
rc = qeth_idx_activate_read_channel(card);
if (rc == -EINTR) {
QETH_CARD_TEXT(card, 2, "break2");
return rc;
} else if (rc) {
QETH_CARD_TEXT_(card, 2, "3err%d", rc);
if (--retries < 0)
goto out;
else
goto retry;
}
rc = qeth_idx_activate_write_channel(card);
if (rc == -EINTR) {
QETH_CARD_TEXT(card, 2, "break3");
return rc;
} else if (rc) {
QETH_CARD_TEXT_(card, 2, "4err%d", rc);
if (--retries < 0)
goto out;
else
goto retry;
}
card->read_or_write_problem = 0;
rc = qeth_mpc_initialize(card);
if (rc) {
QETH_CARD_TEXT_(card, 2, "5err%d", rc);
goto out;
}
rc = qeth_send_startlan(card);
if (rc) {
QETH_CARD_TEXT_(card, 2, "6err%d", rc);
if (rc == -ENETDOWN) {
dev_warn(&card->gdev->dev, "The LAN is offline\n");
*carrier_ok = false;
} else {
goto out;
}
} else {
*carrier_ok = true;
}
card->options.ipa4.supported = 0;
card->options.ipa6.supported = 0;
card->options.adp.supported = 0;
card->options.sbp.supported_funcs = 0;
card->info.diagass_support = 0;
rc = qeth_query_ipassists(card, QETH_PROT_IPV4);
if (rc == -ENOMEM)
goto out;
if (qeth_is_supported(card, IPA_IPV6)) {
rc = qeth_query_ipassists(card, QETH_PROT_IPV6);
if (rc == -ENOMEM)
goto out;
}
if (qeth_is_supported(card, IPA_SETADAPTERPARMS)) {
rc = qeth_query_setadapterparms(card);
if (rc < 0) {
QETH_CARD_TEXT_(card, 2, "7err%d", rc);
goto out;
}
}
if (qeth_adp_supported(card, IPA_SETADP_SET_DIAG_ASSIST)) {
rc = qeth_query_setdiagass(card);
if (rc)
QETH_CARD_TEXT_(card, 2, "8err%d", rc);
}
if (!qeth_is_diagass_supported(card, QETH_DIAGS_CMD_TRAP) ||
(card->info.hwtrap && qeth_hw_trap(card, QETH_DIAGS_TRAP_ARM)))
card->info.hwtrap = 0;
rc = qeth_set_access_ctrl_online(card, 0);
if (rc)
goto out;
rc = qeth_init_qdio_queues(card);
if (rc) {
QETH_CARD_TEXT_(card, 2, "9err%d", rc);
goto out;
}
return 0;
out:
dev_warn(&card->gdev->dev, "The qeth device driver failed to recover "
"an error on the device\n");
QETH_DBF_MESSAGE(2, "Initialization for device %x failed in hardsetup! rc=%d\n",
CARD_DEVID(card), rc);
return rc;
}
EXPORT_SYMBOL_GPL(qeth_core_hardsetup_card);
static int qeth_set_online(struct qeth_card *card)
{
int rc;
mutex_lock(&card->discipline_mutex);
mutex_lock(&card->conf_mutex);
QETH_CARD_TEXT(card, 2, "setonlin");
rc = card->discipline->set_online(card);
mutex_unlock(&card->conf_mutex);
mutex_unlock(&card->discipline_mutex);
return rc;
}
int qeth_set_offline(struct qeth_card *card, bool resetting)
{
int rc, rc2, rc3;
mutex_lock(&card->discipline_mutex);
mutex_lock(&card->conf_mutex);
QETH_CARD_TEXT(card, 3, "setoffl");
if ((!resetting && 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();
card->discipline->set_offline(card);
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(&card->gdev->dev.kobj, KOBJ_CHANGE);
mutex_unlock(&card->conf_mutex);
mutex_unlock(&card->discipline_mutex);
return 0;
}
EXPORT_SYMBOL_GPL(qeth_set_offline);
static int qeth_do_reset(void *data)
{
struct qeth_card *card = data;
int rc;
QETH_CARD_TEXT(card, 2, "recover1");
if (!qeth_do_run_thread(card, QETH_RECOVER_THREAD))
return 0;
QETH_CARD_TEXT(card, 2, "recover2");
dev_warn(&card->gdev->dev,
"A recovery process has been started for the device\n");
qeth_set_offline(card, true);
rc = qeth_set_online(card);
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;
}
#if IS_ENABLED(CONFIG_QETH_L3)
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 qeth_hdr_layer3 *l3_hdr = &hdr->hdr.l3;
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 (!(l3_hdr->flags & QETH_HDR_PASSTHRU)) {
u16 prot = (l3_hdr->flags & QETH_HDR_IPV6) ? ETH_P_IPV6 :
ETH_P_IP;
unsigned char tg_addr[ETH_ALEN];
skb_reset_network_header(skb);
switch (l3_hdr->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, 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, dev->dev_addr);
}
if (l3_hdr->ext_flags & QETH_HDR_EXT_SRC_MAC_ADDR)
dev_hard_header(skb, dev, prot, tg_addr,
&l3_hdr->next_hop.rx.src_mac, skb->len);
else
dev_hard_header(skb, dev, prot, tg_addr, "FAKELL",
skb->len);
}
/* copy VLAN tag from hdr into skb */
if (!card->options.sniffer &&
(l3_hdr->ext_flags & (QETH_HDR_EXT_VLAN_FRAME |
QETH_HDR_EXT_INCLUDE_VLAN_TAG))) {
u16 tag = (l3_hdr->ext_flags & QETH_HDR_EXT_VLAN_FRAME) ?
l3_hdr->vlan_id :
l3_hdr->next_hop.rx.vlan_id;
__vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), tag);
}
}
#endif
static void qeth_receive_skb(struct qeth_card *card, struct sk_buff *skb,
struct qeth_hdr *hdr, bool uses_frags)
{
struct napi_struct *napi = &card->napi;
bool is_cso;
switch (hdr->hdr.l2.id) {
case QETH_HEADER_TYPE_OSN:
skb_push(skb, sizeof(*hdr));
skb_copy_to_linear_data(skb, hdr, sizeof(*hdr));
QETH_CARD_STAT_ADD(card, rx_bytes, skb->len);
QETH_CARD_STAT_INC(card, rx_packets);
card->osn_info.data_cb(skb);
return;
#if IS_ENABLED(CONFIG_QETH_L3)
case QETH_HEADER_TYPE_LAYER3:
qeth_l3_rebuild_skb(card, skb, hdr);
is_cso = hdr->hdr.l3.ext_flags & QETH_HDR_EXT_CSUM_TRANSP_REQ;
break;
#endif
case QETH_HEADER_TYPE_LAYER2:
is_cso = hdr->hdr.l2.flags[1] & QETH_HDR_EXT_CSUM_TRANSP_REQ;
break;
default:
/* never happens */
if (uses_frags)
napi_free_frags(napi);
else
dev_kfree_skb_any(skb);
return;
}
if (is_cso && (card->dev->features & NETIF_F_RXCSUM)) {
skb->ip_summed = CHECKSUM_UNNECESSARY;
QETH_CARD_STAT_INC(card, rx_skb_csum);
} else {
skb->ip_summed = CHECKSUM_NONE;
}
QETH_CARD_STAT_ADD(card, rx_bytes, skb->len);
QETH_CARD_STAT_INC(card, rx_packets);
if (skb_is_nonlinear(skb)) {
QETH_CARD_STAT_INC(card, rx_sg_skbs);
QETH_CARD_STAT_ADD(card, rx_sg_frags,
skb_shinfo(skb)->nr_frags);
}
if (uses_frags) {
napi_gro_frags(napi);
} else {
skb->protocol = eth_type_trans(skb, skb->dev);
napi_gro_receive(napi, skb);
}
}
static void qeth_create_skb_frag(struct sk_buff *skb, char *data, int data_len)
{
struct page *page = virt_to_page(data);
unsigned int next_frag;
next_frag = skb_shinfo(skb)->nr_frags;
get_page(page);
skb_add_rx_frag(skb, next_frag, page, offset_in_page(data), data_len,
data_len);
}
static inline int qeth_is_last_sbale(struct qdio_buffer_element *sbale)
{
return (sbale->eflags & SBAL_EFLAGS_LAST_ENTRY);
}
static int qeth_extract_skb(struct qeth_card *card,
struct qeth_qdio_buffer *qethbuffer, u8 *element_no,
int *__offset)
{
struct qeth_priv *priv = netdev_priv(card->dev);
struct qdio_buffer *buffer = qethbuffer->buffer;
struct napi_struct *napi = &card->napi;
struct qdio_buffer_element *element;
unsigned int linear_len = 0;
bool uses_frags = false;
int offset = *__offset;
bool use_rx_sg = false;
unsigned int headroom;
struct qeth_hdr *hdr;
struct sk_buff *skb;
int skb_len = 0;
element = &buffer->element[*element_no];
next_packet:
/* qeth_hdr must not cross element boundaries */
while (element->length < offset + sizeof(struct qeth_hdr)) {
if (qeth_is_last_sbale(element))
return -ENODATA;
element++;
offset = 0;
}
hdr = phys_to_virt(element->addr) + offset;
offset += sizeof(*hdr);
skb = NULL;
switch (hdr->hdr.l2.id) {
case QETH_HEADER_TYPE_LAYER2:
skb_len = hdr->hdr.l2.pkt_length;
linear_len = ETH_HLEN;
headroom = 0;
break;
case QETH_HEADER_TYPE_LAYER3:
skb_len = hdr->hdr.l3.length;
if (!IS_LAYER3(card)) {
QETH_CARD_STAT_INC(card, rx_dropped_notsupp);
goto walk_packet;
}
if (hdr->hdr.l3.flags & QETH_HDR_PASSTHRU) {
linear_len = ETH_HLEN;
headroom = 0;
break;
}
if (hdr->hdr.l3.flags & QETH_HDR_IPV6)
linear_len = sizeof(struct ipv6hdr);
else
linear_len = sizeof(struct iphdr);
headroom = ETH_HLEN;
break;
case QETH_HEADER_TYPE_OSN:
skb_len = hdr->hdr.osn.pdu_length;
if (!IS_OSN(card)) {
QETH_CARD_STAT_INC(card, rx_dropped_notsupp);
goto walk_packet;
}
linear_len = skb_len;
headroom = sizeof(struct qeth_hdr);
break;
default:
if (hdr->hdr.l2.id & QETH_HEADER_MASK_INVAL)
QETH_CARD_STAT_INC(card, rx_frame_errors);
else
QETH_CARD_STAT_INC(card, rx_dropped_notsupp);
/* Can't determine packet length, drop the whole buffer. */
return -EPROTONOSUPPORT;
}
if (skb_len < linear_len) {
QETH_CARD_STAT_INC(card, rx_dropped_runt);
goto walk_packet;
}
use_rx_sg = (card->options.cq == QETH_CQ_ENABLED) ||
(skb_len > READ_ONCE(priv->rx_copybreak) &&
!atomic_read(&card->force_alloc_skb) &&
!IS_OSN(card));
if (use_rx_sg) {
/* QETH_CQ_ENABLED only: */
if (qethbuffer->rx_skb &&
skb_tailroom(qethbuffer->rx_skb) >= linear_len + headroom) {
skb = qethbuffer->rx_skb;
qethbuffer->rx_skb = NULL;
goto use_skb;
}
skb = napi_get_frags(napi);
if (!skb) {
/* -ENOMEM, no point in falling back further. */
QETH_CARD_STAT_INC(card, rx_dropped_nomem);
goto walk_packet;
}
if (skb_tailroom(skb) >= linear_len + headroom) {
uses_frags = true;
goto use_skb;
}
netdev_info_once(card->dev,
"Insufficient linear space in NAPI frags skb, need %u but have %u\n",
linear_len + headroom, skb_tailroom(skb));
/* Shouldn't happen. Don't optimize, fall back to linear skb. */
}
linear_len = skb_len;
skb = napi_alloc_skb(napi, linear_len + headroom);
if (!skb) {
QETH_CARD_STAT_INC(card, rx_dropped_nomem);
goto walk_packet;
}
use_skb:
if (headroom)
skb_reserve(skb, headroom);
walk_packet:
while (skb_len) {
int data_len = min(skb_len, (int)(element->length - offset));
char *data = phys_to_virt(element->addr) + offset;
skb_len -= data_len;
offset += data_len;
/* Extract data from current element: */
if (skb && data_len) {
if (linear_len) {
unsigned int copy_len;
copy_len = min_t(unsigned int, linear_len,
data_len);
skb_put_data(skb, data, copy_len);
linear_len -= copy_len;
data_len -= copy_len;
data += copy_len;
}
if (data_len)
qeth_create_skb_frag(skb, data, data_len);
}
/* Step forward to next element: */
if (skb_len) {
if (qeth_is_last_sbale(element)) {
QETH_CARD_TEXT(card, 4, "unexeob");
QETH_CARD_HEX(card, 2, buffer, sizeof(void *));
if (skb) {
if (uses_frags)
napi_free_frags(napi);
else
dev_kfree_skb_any(skb);
QETH_CARD_STAT_INC(card,
rx_length_errors);
}
return -EMSGSIZE;
}
element++;
offset = 0;
}
}
/* This packet was skipped, go get another one: */
if (!skb)
goto next_packet;
*element_no = element - &buffer->element[0];
*__offset = offset;
qeth_receive_skb(card, skb, hdr, uses_frags);
return 0;
}
static unsigned int qeth_extract_skbs(struct qeth_card *card, int budget,
struct qeth_qdio_buffer *buf, bool *done)
{
unsigned int work_done = 0;
while (budget) {
if (qeth_extract_skb(card, buf, &card->rx.buf_element,
&card->rx.e_offset)) {
*done = true;
break;
}
work_done++;
budget--;
}
return work_done;
}
static unsigned int qeth_rx_poll(struct qeth_card *card, int budget)
{
unsigned int work_done = 0;
while (budget > 0) {
struct qeth_qdio_buffer *buffer;
unsigned int skbs_done = 0;
bool done = false;
/* Fetch completed RX buffers: */
if (!card->rx.b_count) {
card->rx.qdio_err = 0;
card->rx.b_count = qdio_get_next_buffers(
card->data.ccwdev, 0, &card->rx.b_index,
&card->rx.qdio_err);
if (card->rx.b_count <= 0) {
card->rx.b_count = 0;
break;
}
}
/* Process one completed RX buffer: */
buffer = &card->qdio.in_q->bufs[card->rx.b_index];
if (!(card->rx.qdio_err &&
qeth_check_qdio_errors(card, buffer->buffer,
card->rx.qdio_err, "qinerr")))
skbs_done = qeth_extract_skbs(card, budget, buffer,
&done);
else
done = true;
work_done += skbs_done;
budget -= skbs_done;
if (done) {
QETH_CARD_STAT_INC(card, rx_bufs);
qeth_put_buffer_pool_entry(card, buffer->pool_entry);
qeth_queue_input_buffer(card, card->rx.b_index);
card->rx.b_count--;
/* Step forward to next buffer: */
card->rx.b_index = QDIO_BUFNR(card->rx.b_index + 1);
card->rx.buf_element = 0;
card->rx.e_offset = 0;
}
}
return work_done;
}
static void qeth_cq_poll(struct qeth_card *card)
{
unsigned int work_done = 0;
while (work_done < QDIO_MAX_BUFFERS_PER_Q) {
unsigned int start, error;
int completed;
completed = qdio_inspect_queue(CARD_DDEV(card), 1, true, &start,
&error);
if (completed <= 0)
return;
qeth_qdio_cq_handler(card, error, 1, start, completed);
work_done += completed;
}
}
int qeth_poll(struct napi_struct *napi, int budget)
{
struct qeth_card *card = container_of(napi, struct qeth_card, napi);
unsigned int work_done;
work_done = qeth_rx_poll(card, budget);
if (card->options.cq == QETH_CQ_ENABLED)
qeth_cq_poll(card);
/* Exhausted the RX budget. Keep IRQ disabled, we get called again. */
if (budget && work_done >= budget)
return work_done;
if (napi_complete_done(napi, work_done) &&
qdio_start_irq(CARD_DDEV(card)))
napi_schedule(napi);
return work_done;
}
EXPORT_SYMBOL_GPL(qeth_poll);
static void qeth_iqd_tx_complete(struct qeth_qdio_out_q *queue,
unsigned int bidx, bool error, int budget)
{
struct qeth_qdio_out_buffer *buffer = queue->bufs[bidx];
u8 sflags = buffer->buffer->element[15].sflags;
struct qeth_card *card = queue->card;
if (queue->bufstates && (queue->bufstates[bidx].flags &
QDIO_OUTBUF_STATE_FLAG_PENDING)) {
WARN_ON_ONCE(card->options.cq != QETH_CQ_ENABLED);
if (atomic_cmpxchg(&buffer->state, QETH_QDIO_BUF_PRIMED,
QETH_QDIO_BUF_PENDING) ==
QETH_QDIO_BUF_PRIMED)
qeth_notify_skbs(queue, buffer, TX_NOTIFY_PENDING);
QETH_CARD_TEXT_(card, 5, "pel%u", bidx);
/* prepare the queue slot for re-use: */
qeth_scrub_qdio_buffer(buffer->buffer, queue->max_elements);
if (qeth_init_qdio_out_buf(queue, bidx)) {
QETH_CARD_TEXT(card, 2, "outofbuf");
qeth_schedule_recovery(card);
}
return;
}
if (card->options.cq == QETH_CQ_ENABLED)
qeth_notify_skbs(queue, buffer,
qeth_compute_cq_notification(sflags, 0));
qeth_clear_output_buffer(queue, buffer, error, budget);
}
static int qeth_tx_poll(struct napi_struct *napi, int budget)
{
struct qeth_qdio_out_q *queue = qeth_napi_to_out_queue(napi);
unsigned int queue_no = queue->queue_no;
struct qeth_card *card = queue->card;
struct net_device *dev = card->dev;
unsigned int work_done = 0;
struct netdev_queue *txq;
txq = netdev_get_tx_queue(dev, qeth_iqd_translate_txq(dev, queue_no));
while (1) {
unsigned int start, error, i;
unsigned int packets = 0;
unsigned int bytes = 0;
int completed;
if (qeth_out_queue_is_empty(queue)) {
napi_complete(napi);
return 0;
}
/* Give the CPU a breather: */
if (work_done >= QDIO_MAX_BUFFERS_PER_Q) {
QETH_TXQ_STAT_INC(queue, completion_yield);
if (napi_complete_done(napi, 0))
napi_schedule(napi);
return 0;
}
completed = qdio_inspect_queue(CARD_DDEV(card), queue_no, false,
&start, &error);
if (completed <= 0) {
/* Ensure we see TX completion for pending work: */
if (napi_complete_done(napi, 0))
qeth_tx_arm_timer(queue, QETH_TX_TIMER_USECS);
return 0;
}
for (i = start; i < start + completed; i++) {
struct qeth_qdio_out_buffer *buffer;
unsigned int bidx = QDIO_BUFNR(i);
buffer = queue->bufs[bidx];
packets += buffer->frames;
bytes += buffer->bytes;
qeth_handle_send_error(card, buffer, error);
qeth_iqd_tx_complete(queue, bidx, error, budget);
qeth_cleanup_handled_pending(queue, bidx, false);
}
netdev_tx_completed_queue(txq, packets, bytes);
atomic_sub(completed, &queue->used_buffers);
work_done += completed;
/* xmit may have observed the full-condition, but not yet
* stopped the txq. In which case the code below won't trigger.
* So before returning, xmit will re-check the txq's fill level
* and wake it up if needed.
*/
if (netif_tx_queue_stopped(txq) &&
!qeth_out_queue_is_full(queue))
netif_tx_wake_queue(txq);
}
}
static int qeth_setassparms_inspect_rc(struct qeth_ipa_cmd *cmd)
{
if (!cmd->hdr.return_code)
cmd->hdr.return_code = cmd->data.setassparms.hdr.return_code;
return cmd->hdr.return_code;
}
static int qeth_setassparms_get_caps_cb(struct qeth_card *card,
struct qeth_reply *reply,
unsigned long data)
{
struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
struct qeth_ipa_caps *caps = reply->param;
if (qeth_setassparms_inspect_rc(cmd))
return -EIO;
caps->supported = cmd->data.setassparms.data.caps.supported;
caps->enabled = cmd->data.setassparms.data.caps.enabled;
return 0;
}
int qeth_setassparms_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, 4, "defadpcb");
if (cmd->hdr.return_code)
return -EIO;
cmd->hdr.return_code = cmd->data.setassparms.hdr.return_code;
if (cmd->hdr.prot_version == QETH_PROT_IPV4)
card->options.ipa4.enabled = cmd->hdr.assists.enabled;
if (cmd->hdr.prot_version == QETH_PROT_IPV6)
card->options.ipa6.enabled = cmd->hdr.assists.enabled;
return 0;
}
EXPORT_SYMBOL_GPL(qeth_setassparms_cb);
struct qeth_cmd_buffer *qeth_get_setassparms_cmd(struct qeth_card *card,
enum qeth_ipa_funcs ipa_func,
u16 cmd_code,
unsigned int data_length,
enum qeth_prot_versions prot)
{
struct qeth_ipacmd_setassparms *setassparms;
struct qeth_ipacmd_setassparms_hdr *hdr;
struct qeth_cmd_buffer *iob;
QETH_CARD_TEXT(card, 4, "getasscm");
iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SETASSPARMS, prot,
data_length +
offsetof(struct qeth_ipacmd_setassparms,
data));
if (!iob)
return NULL;
setassparms = &__ipa_cmd(iob)->data.setassparms;
setassparms->assist_no = ipa_func;
hdr = &setassparms->hdr;
hdr->length = sizeof(*hdr) + data_length;
hdr->command_code = cmd_code;
return iob;
}
EXPORT_SYMBOL_GPL(qeth_get_setassparms_cmd);
int qeth_send_simple_setassparms_prot(struct qeth_card *card,
enum qeth_ipa_funcs ipa_func,
u16 cmd_code, u32 *data,
enum qeth_prot_versions prot)
{
unsigned int length = data ? SETASS_DATA_SIZEOF(flags_32bit) : 0;
struct qeth_cmd_buffer *iob;
QETH_CARD_TEXT_(card, 4, "simassp%i", prot);
iob = qeth_get_setassparms_cmd(card, ipa_func, cmd_code, length, prot);
if (!iob)
return -ENOMEM;
if (data)
__ipa_cmd(iob)->data.setassparms.data.flags_32bit = *data;
return qeth_send_ipa_cmd(card, iob, qeth_setassparms_cb, NULL);
}
EXPORT_SYMBOL_GPL(qeth_send_simple_setassparms_prot);
static void qeth_unregister_dbf_views(void)
{
int x;
for (x = 0; x < QETH_DBF_INFOS; x++) {
debug_unregister(qeth_dbf[x].id);
qeth_dbf[x].id = NULL;
}
}
void qeth_dbf_longtext(debug_info_t *id, int level, char *fmt, ...)
{
char dbf_txt_buf[32];
va_list args;
if (!debug_level_enabled(id, level))
return;
va_start(args, fmt);
vsnprintf(dbf_txt_buf, sizeof(dbf_txt_buf), fmt, args);
va_end(args);
debug_text_event(id, level, dbf_txt_buf);
}
EXPORT_SYMBOL_GPL(qeth_dbf_longtext);
static int qeth_register_dbf_views(void)
{
int ret;
int x;
for (x = 0; x < QETH_DBF_INFOS; x++) {
/* register the areas */
qeth_dbf[x].id = debug_register(qeth_dbf[x].name,
qeth_dbf[x].pages,
qeth_dbf[x].areas,
qeth_dbf[x].len);
if (qeth_dbf[x].id == NULL) {
qeth_unregister_dbf_views();
return -ENOMEM;
}
/* register a view */
ret = debug_register_view(qeth_dbf[x].id, qeth_dbf[x].view);
if (ret) {
qeth_unregister_dbf_views();
return ret;
}
/* set a passing level */
debug_set_level(qeth_dbf[x].id, qeth_dbf[x].level);
}
return 0;
}
static DEFINE_MUTEX(qeth_mod_mutex); /* for synchronized module loading */
int qeth_core_load_discipline(struct qeth_card *card,
enum qeth_discipline_id discipline)
{
mutex_lock(&qeth_mod_mutex);
switch (discipline) {
case QETH_DISCIPLINE_LAYER3:
card->discipline = try_then_request_module(
symbol_get(qeth_l3_discipline), "qeth_l3");
break;
case QETH_DISCIPLINE_LAYER2:
card->discipline = try_then_request_module(
symbol_get(qeth_l2_discipline), "qeth_l2");
break;
default:
break;
}
mutex_unlock(&qeth_mod_mutex);
if (!card->discipline) {
dev_err(&card->gdev->dev, "There is no kernel module to "
"support discipline %d\n", discipline);
return -EINVAL;
}
card->options.layer = discipline;
return 0;
}
void qeth_core_free_discipline(struct qeth_card *card)
{
if (IS_LAYER2(card))
symbol_put(qeth_l2_discipline);
else
symbol_put(qeth_l3_discipline);
card->options.layer = QETH_DISCIPLINE_UNDETERMINED;
card->discipline = NULL;
}
const struct device_type qeth_generic_devtype = {
.name = "qeth_generic",
.groups = qeth_generic_attr_groups,
};
EXPORT_SYMBOL_GPL(qeth_generic_devtype);
static const struct device_type qeth_osn_devtype = {
.name = "qeth_osn",
.groups = qeth_osn_attr_groups,
};
#define DBF_NAME_LEN 20
struct qeth_dbf_entry {
char dbf_name[DBF_NAME_LEN];
debug_info_t *dbf_info;
struct list_head dbf_list;
};
static LIST_HEAD(qeth_dbf_list);
static DEFINE_MUTEX(qeth_dbf_list_mutex);
static debug_info_t *qeth_get_dbf_entry(char *name)
{
struct qeth_dbf_entry *entry;
debug_info_t *rc = NULL;
mutex_lock(&qeth_dbf_list_mutex);
list_for_each_entry(entry, &qeth_dbf_list, dbf_list) {
if (strcmp(entry->dbf_name, name) == 0) {
rc = entry->dbf_info;
break;
}
}
mutex_unlock(&qeth_dbf_list_mutex);
return rc;
}
static int qeth_add_dbf_entry(struct qeth_card *card, char *name)
{
struct qeth_dbf_entry *new_entry;
card->debug = debug_register(name, 2, 1, 8);
if (!card->debug) {
QETH_DBF_TEXT_(SETUP, 2, "%s", "qcdbf");
goto err;
}
if (debug_register_view(card->debug, &debug_hex_ascii_view))
goto err_dbg;
new_entry = kzalloc(sizeof(struct qeth_dbf_entry), GFP_KERNEL);
if (!new_entry)
goto err_dbg;
strncpy(new_entry->dbf_name, name, DBF_NAME_LEN);
new_entry->dbf_info = card->debug;
mutex_lock(&qeth_dbf_list_mutex);
list_add(&new_entry->dbf_list, &qeth_dbf_list);
mutex_unlock(&qeth_dbf_list_mutex);
return 0;
err_dbg:
debug_unregister(card->debug);
err:
return -ENOMEM;
}
static void qeth_clear_dbf_list(void)
{
struct qeth_dbf_entry *entry, *tmp;
mutex_lock(&qeth_dbf_list_mutex);
list_for_each_entry_safe(entry, tmp, &qeth_dbf_list, dbf_list) {
list_del(&entry->dbf_list);
debug_unregister(entry->dbf_info);
kfree(entry);
}
mutex_unlock(&qeth_dbf_list_mutex);
}
static struct net_device *qeth_alloc_netdev(struct qeth_card *card)
{
struct net_device *dev;
struct qeth_priv *priv;
switch (card->info.type) {
case QETH_CARD_TYPE_IQD:
dev = alloc_netdev_mqs(sizeof(*priv), "hsi%d", NET_NAME_UNKNOWN,
ether_setup, QETH_MAX_OUT_QUEUES, 1);
break;
case QETH_CARD_TYPE_OSM:
dev = alloc_etherdev(sizeof(*priv));
break;
case QETH_CARD_TYPE_OSN:
dev = alloc_netdev(sizeof(*priv), "osn%d", NET_NAME_UNKNOWN,
ether_setup);
break;
default:
dev = alloc_etherdev_mqs(sizeof(*priv), QETH_MAX_OUT_QUEUES, 1);
}
if (!dev)
return NULL;
priv = netdev_priv(dev);
priv->rx_copybreak = QETH_RX_COPYBREAK;
dev->ml_priv = card;
dev->watchdog_timeo = QETH_TX_TIMEOUT;
dev->min_mtu = IS_OSN(card) ? 64 : 576;
/* initialized when device first goes online: */
dev->max_mtu = 0;
dev->mtu = 0;
SET_NETDEV_DEV(dev, &card->gdev->dev);
netif_carrier_off(dev);
dev->ethtool_ops = IS_OSN(card) ? &qeth_osn_ethtool_ops :
&qeth_ethtool_ops;
return dev;
}
struct net_device *qeth_clone_netdev(struct net_device *orig)
{
struct net_device *clone = qeth_alloc_netdev(orig->ml_priv);
if (!clone)
return NULL;
clone->dev_port = orig->dev_port;
return clone;
}
int qeth_setup_netdev(struct qeth_card *card)
{
struct net_device *dev = card->dev;
unsigned int num_tx_queues;
dev->priv_flags &= ~IFF_TX_SKB_SHARING;
dev->hw_features |= NETIF_F_SG;
dev->vlan_features |= NETIF_F_SG;
if (IS_IQD(card)) {
dev->features |= NETIF_F_SG;
num_tx_queues = QETH_IQD_MIN_TXQ;
} else if (IS_VM_NIC(card)) {
num_tx_queues = 1;
} else {
num_tx_queues = dev->real_num_tx_queues;
}
return qeth_set_real_num_tx_queues(card, num_tx_queues);
}
EXPORT_SYMBOL_GPL(qeth_setup_netdev);
static int qeth_core_probe_device(struct ccwgroup_device *gdev)
{
struct qeth_card *card;
struct device *dev;
int rc;
enum qeth_discipline_id enforced_disc;
char dbf_name[DBF_NAME_LEN];
QETH_DBF_TEXT(SETUP, 2, "probedev");
dev = &gdev->dev;
if (!get_device(dev))
return -ENODEV;
QETH_DBF_TEXT_(SETUP, 2, "%s", dev_name(&gdev->dev));
card = qeth_alloc_card(gdev);
if (!card) {
QETH_DBF_TEXT_(SETUP, 2, "1err%d", -ENOMEM);
rc = -ENOMEM;
goto err_dev;
}
snprintf(dbf_name, sizeof(dbf_name), "qeth_card_%s",
dev_name(&gdev->dev));
card->debug = qeth_get_dbf_entry(dbf_name);
if (!card->debug) {
rc = qeth_add_dbf_entry(card, dbf_name);
if (rc)
goto err_card;
}
qeth_setup_card(card);
card->dev = qeth_alloc_netdev(card);
if (!card->dev) {
rc = -ENOMEM;
goto err_card;
}
qeth_determine_capabilities(card);
qeth_set_blkt_defaults(card);
card->qdio.no_out_queues = card->dev->num_tx_queues;
rc = qeth_update_from_chp_desc(card);
if (rc)
goto err_chp_desc;
enforced_disc = qeth_enforce_discipline(card);
switch (enforced_disc) {
case QETH_DISCIPLINE_UNDETERMINED:
gdev->dev.type = &qeth_generic_devtype;
break;
default:
card->info.layer_enforced = true;
rc = qeth_core_load_discipline(card, enforced_disc);
if (rc)
goto err_load;
gdev->dev.type = IS_OSN(card) ? &qeth_osn_devtype :
card->discipline->devtype;
rc = card->discipline->setup(card->gdev);
if (rc)
goto err_disc;
break;
}
return 0;
err_disc:
qeth_core_free_discipline(card);
err_load:
err_chp_desc:
free_netdev(card->dev);
err_card:
qeth_core_free_card(card);
err_dev:
put_device(dev);
return rc;
}
static void qeth_core_remove_device(struct ccwgroup_device *gdev)
{
struct qeth_card *card = dev_get_drvdata(&gdev->dev);
QETH_CARD_TEXT(card, 2, "removedv");
if (card->discipline) {
card->discipline->remove(gdev);
qeth_core_free_discipline(card);
}
qeth_free_qdio_queues(card);
free_netdev(card->dev);
qeth_core_free_card(card);
put_device(&gdev->dev);
}
static int qeth_core_set_online(struct ccwgroup_device *gdev)
{
struct qeth_card *card = dev_get_drvdata(&gdev->dev);
int rc = 0;
enum qeth_discipline_id def_discipline;
if (!card->discipline) {
def_discipline = IS_IQD(card) ? QETH_DISCIPLINE_LAYER3 :
QETH_DISCIPLINE_LAYER2;
rc = qeth_core_load_discipline(card, def_discipline);
if (rc)
goto err;
rc = card->discipline->setup(card->gdev);
if (rc) {
qeth_core_free_discipline(card);
goto err;
}
}
rc = qeth_set_online(card);
err:
return rc;
}
static int qeth_core_set_offline(struct ccwgroup_device *gdev)
{
struct qeth_card *card = dev_get_drvdata(&gdev->dev);
return qeth_set_offline(card, false);
}
static void qeth_core_shutdown(struct ccwgroup_device *gdev)
{
struct qeth_card *card = dev_get_drvdata(&gdev->dev);
qeth_set_allowed_threads(card, 0, 1);
if ((gdev->state == CCWGROUP_ONLINE) && card->info.hwtrap)
qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
qeth_qdio_clear_card(card, 0);
qeth_drain_output_queues(card);
qdio_free(CARD_DDEV(card));
}
static ssize_t group_store(struct device_driver *ddrv, const char *buf,
size_t count)
{
int err;
err = ccwgroup_create_dev(qeth_core_root_dev, to_ccwgroupdrv(ddrv), 3,
buf);
return err ? err : count;
}
static DRIVER_ATTR_WO(group);
static struct attribute *qeth_drv_attrs[] = {
&driver_attr_group.attr,
NULL,
};
static struct attribute_group qeth_drv_attr_group = {
.attrs = qeth_drv_attrs,
};
static const struct attribute_group *qeth_drv_attr_groups[] = {
&qeth_drv_attr_group,
NULL,
};
static struct ccwgroup_driver qeth_core_ccwgroup_driver = {
.driver = {
.groups = qeth_drv_attr_groups,
.owner = THIS_MODULE,
.name = "qeth",
},
.ccw_driver = &qeth_ccw_driver,
.setup = qeth_core_probe_device,
.remove = qeth_core_remove_device,
.set_online = qeth_core_set_online,
.set_offline = qeth_core_set_offline,
.shutdown = qeth_core_shutdown,
};
struct qeth_card *qeth_get_card_by_busid(char *bus_id)
{
struct ccwgroup_device *gdev;
struct qeth_card *card;
gdev = get_ccwgroupdev_by_busid(&qeth_core_ccwgroup_driver, bus_id);
if (!gdev)
return NULL;
card = dev_get_drvdata(&gdev->dev);
put_device(&gdev->dev);
return card;
}
EXPORT_SYMBOL_GPL(qeth_get_card_by_busid);
int qeth_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
{
struct qeth_card *card = dev->ml_priv;
struct mii_ioctl_data *mii_data;
int rc = 0;
switch (cmd) {
case SIOC_QETH_ADP_SET_SNMP_CONTROL:
rc = qeth_snmp_command(card, rq->ifr_ifru.ifru_data);
break;
case SIOC_QETH_GET_CARD_TYPE:
if ((IS_OSD(card) || IS_OSM(card) || IS_OSX(card)) &&
!IS_VM_NIC(card))
return 1;
return 0;
case SIOCGMIIPHY:
mii_data = if_mii(rq);
mii_data->phy_id = 0;
break;
case SIOCGMIIREG:
mii_data = if_mii(rq);
if (mii_data->phy_id != 0)
rc = -EINVAL;
else
mii_data->val_out = qeth_mdio_read(dev,
mii_data->phy_id, mii_data->reg_num);
break;
case SIOC_QETH_QUERY_OAT:
rc = qeth_query_oat_command(card, rq->ifr_ifru.ifru_data);
break;
default:
if (card->discipline->do_ioctl)
rc = card->discipline->do_ioctl(dev, rq, cmd);
else
rc = -EOPNOTSUPP;
}
if (rc)
QETH_CARD_TEXT_(card, 2, "ioce%x", rc);
return rc;
}
EXPORT_SYMBOL_GPL(qeth_do_ioctl);
static int qeth_start_csum_cb(struct qeth_card *card, struct qeth_reply *reply,
unsigned long data)
{
struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
u32 *features = reply->param;
if (qeth_setassparms_inspect_rc(cmd))
return -EIO;
*features = cmd->data.setassparms.data.flags_32bit;
return 0;
}
static int qeth_set_csum_off(struct qeth_card *card, enum qeth_ipa_funcs cstype,
enum qeth_prot_versions prot)
{
return qeth_send_simple_setassparms_prot(card, cstype, IPA_CMD_ASS_STOP,
NULL, prot);
}
static int qeth_set_csum_on(struct qeth_card *card, enum qeth_ipa_funcs cstype,
enum qeth_prot_versions prot, u8 *lp2lp)
{
u32 required_features = QETH_IPA_CHECKSUM_UDP | QETH_IPA_CHECKSUM_TCP;
struct qeth_cmd_buffer *iob;
struct qeth_ipa_caps caps;
u32 features;
int rc;
/* some L3 HW requires combined L3+L4 csum offload: */
if (IS_LAYER3(card) && prot == QETH_PROT_IPV4 &&
cstype == IPA_OUTBOUND_CHECKSUM)
required_features |= QETH_IPA_CHECKSUM_IP_HDR;
iob = qeth_get_setassparms_cmd(card, cstype, IPA_CMD_ASS_START, 0,
prot);
if (!iob)
return -ENOMEM;
rc = qeth_send_ipa_cmd(card, iob, qeth_start_csum_cb, &features);
if (rc)
return rc;
if ((required_features & features) != required_features) {
qeth_set_csum_off(card, cstype, prot);
return -EOPNOTSUPP;
}
iob = qeth_get_setassparms_cmd(card, cstype, IPA_CMD_ASS_ENABLE,
SETASS_DATA_SIZEOF(flags_32bit),
prot);
if (!iob) {
qeth_set_csum_off(card, cstype, prot);
return -ENOMEM;
}
if (features & QETH_IPA_CHECKSUM_LP2LP)
required_features |= QETH_IPA_CHECKSUM_LP2LP;
__ipa_cmd(iob)->data.setassparms.data.flags_32bit = required_features;
rc = qeth_send_ipa_cmd(card, iob, qeth_setassparms_get_caps_cb, &caps);
if (rc) {
qeth_set_csum_off(card, cstype, prot);
return rc;
}
if (!qeth_ipa_caps_supported(&caps, required_features) ||
!qeth_ipa_caps_enabled(&caps, required_features)) {
qeth_set_csum_off(card, cstype, prot);
return -EOPNOTSUPP;
}
dev_info(&card->gdev->dev, "HW Checksumming (%sbound IPv%d) enabled\n",
cstype == IPA_INBOUND_CHECKSUM ? "in" : "out", prot);
if (lp2lp)
*lp2lp = qeth_ipa_caps_enabled(&caps, QETH_IPA_CHECKSUM_LP2LP);
return 0;
}
static int qeth_set_ipa_csum(struct qeth_card *card, bool on, int cstype,
enum qeth_prot_versions prot, u8 *lp2lp)
{
return on ? qeth_set_csum_on(card, cstype, prot, lp2lp) :
qeth_set_csum_off(card, cstype, prot);
}
static int qeth_start_tso_cb(struct qeth_card *card, struct qeth_reply *reply,
unsigned long data)
{
struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
struct qeth_tso_start_data *tso_data = reply->param;
if (qeth_setassparms_inspect_rc(cmd))
return -EIO;
tso_data->mss = cmd->data.setassparms.data.tso.mss;
tso_data->supported = cmd->data.setassparms.data.tso.supported;
return 0;
}
static int qeth_set_tso_off(struct qeth_card *card,
enum qeth_prot_versions prot)
{
return qeth_send_simple_setassparms_prot(card, IPA_OUTBOUND_TSO,
IPA_CMD_ASS_STOP, NULL, prot);
}
static int qeth_set_tso_on(struct qeth_card *card,
enum qeth_prot_versions prot)
{
struct qeth_tso_start_data tso_data;
struct qeth_cmd_buffer *iob;
struct qeth_ipa_caps caps;
int rc;
iob = qeth_get_setassparms_cmd(card, IPA_OUTBOUND_TSO,
IPA_CMD_ASS_START, 0, prot);
if (!iob)
return -ENOMEM;
rc = qeth_send_ipa_cmd(card, iob, qeth_start_tso_cb, &tso_data);
if (rc)
return rc;
if (!tso_data.mss || !(tso_data.supported & QETH_IPA_LARGE_SEND_TCP)) {
qeth_set_tso_off(card, prot);
return -EOPNOTSUPP;
}
iob = qeth_get_setassparms_cmd(card, IPA_OUTBOUND_TSO,
IPA_CMD_ASS_ENABLE,
SETASS_DATA_SIZEOF(caps), prot);
if (!iob) {
qeth_set_tso_off(card, prot);
return -ENOMEM;
}
/* enable TSO capability */
__ipa_cmd(iob)->data.setassparms.data.caps.enabled =
QETH_IPA_LARGE_SEND_TCP;
rc = qeth_send_ipa_cmd(card, iob, qeth_setassparms_get_caps_cb, &caps);
if (rc) {
qeth_set_tso_off(card, prot);
return rc;
}
if (!qeth_ipa_caps_supported(&caps, QETH_IPA_LARGE_SEND_TCP) ||
!qeth_ipa_caps_enabled(&caps, QETH_IPA_LARGE_SEND_TCP)) {
qeth_set_tso_off(card, prot);
return -EOPNOTSUPP;
}
dev_info(&card->gdev->dev, "TSOv%u enabled (MSS: %u)\n", prot,
tso_data.mss);
return 0;
}
static int qeth_set_ipa_tso(struct qeth_card *card, bool on,
enum qeth_prot_versions prot)
{
return on ? qeth_set_tso_on(card, prot) : qeth_set_tso_off(card, prot);
}
static int qeth_set_ipa_rx_csum(struct qeth_card *card, bool on)
{
int rc_ipv4 = (on) ? -EOPNOTSUPP : 0;
int rc_ipv6;
if (qeth_is_supported(card, IPA_INBOUND_CHECKSUM))
rc_ipv4 = qeth_set_ipa_csum(card, on, IPA_INBOUND_CHECKSUM,
QETH_PROT_IPV4, NULL);
if (!qeth_is_supported6(card, IPA_INBOUND_CHECKSUM_V6))
/* no/one Offload Assist available, so the rc is trivial */
return rc_ipv4;
rc_ipv6 = qeth_set_ipa_csum(card, on, IPA_INBOUND_CHECKSUM,
QETH_PROT_IPV6, NULL);
if (on)
/* enable: success if any Assist is active */
return (rc_ipv6) ? rc_ipv4 : 0;
/* disable: failure if any Assist is still active */
return (rc_ipv6) ? rc_ipv6 : rc_ipv4;
}
/**
* qeth_enable_hw_features() - (Re-)Enable HW functions for device features
* @dev: a net_device
*/
void qeth_enable_hw_features(struct net_device *dev)
{
struct qeth_card *card = dev->ml_priv;
netdev_features_t features;
features = dev->features;
/* force-off any feature that might need an IPA sequence.
* netdev_update_features() will restart them.
*/
dev->features &= ~dev->hw_features;
/* toggle VLAN filter, so that VIDs are re-programmed: */
if (IS_LAYER2(card) && IS_VM_NIC(card)) {
dev->features &= ~NETIF_F_HW_VLAN_CTAG_FILTER;
dev->wanted_features |= NETIF_F_HW_VLAN_CTAG_FILTER;
}
netdev_update_features(dev);
if (features != dev->features)
dev_warn(&card->gdev->dev,
"Device recovery failed to restore all offload features\n");
}
EXPORT_SYMBOL_GPL(qeth_enable_hw_features);
static void qeth_check_restricted_features(struct qeth_card *card,
netdev_features_t changed,
netdev_features_t actual)
{
netdev_features_t ipv6_features = NETIF_F_TSO6;
netdev_features_t ipv4_features = NETIF_F_TSO;
if (!card->info.has_lp2lp_cso_v6)
ipv6_features |= NETIF_F_IPV6_CSUM;
if (!card->info.has_lp2lp_cso_v4)
ipv4_features |= NETIF_F_IP_CSUM;
if ((changed & ipv6_features) && !(actual & ipv6_features))
qeth_flush_local_addrs6(card);
if ((changed & ipv4_features) && !(actual & ipv4_features))
qeth_flush_local_addrs4(card);
}
int qeth_set_features(struct net_device *dev, netdev_features_t features)
{
struct qeth_card *card = dev->ml_priv;
netdev_features_t changed = dev->features ^ features;
int rc = 0;
QETH_CARD_TEXT(card, 2, "setfeat");
QETH_CARD_HEX(card, 2, &features, sizeof(features));
if ((changed & NETIF_F_IP_CSUM)) {
rc = qeth_set_ipa_csum(card, features & NETIF_F_IP_CSUM,
IPA_OUTBOUND_CHECKSUM, QETH_PROT_IPV4,
&card->info.has_lp2lp_cso_v4);
if (rc)
changed ^= NETIF_F_IP_CSUM;
}
if (changed & NETIF_F_IPV6_CSUM) {
rc = qeth_set_ipa_csum(card, features & NETIF_F_IPV6_CSUM,
IPA_OUTBOUND_CHECKSUM, QETH_PROT_IPV6,
&card->info.has_lp2lp_cso_v6);
if (rc)
changed ^= NETIF_F_IPV6_CSUM;
}
if (changed & NETIF_F_RXCSUM) {
rc = qeth_set_ipa_rx_csum(card, features & NETIF_F_RXCSUM);
if (rc)
changed ^= NETIF_F_RXCSUM;
}
if (changed & NETIF_F_TSO) {
rc = qeth_set_ipa_tso(card, features & NETIF_F_TSO,
QETH_PROT_IPV4);
if (rc)
changed ^= NETIF_F_TSO;
}
if (changed & NETIF_F_TSO6) {
rc = qeth_set_ipa_tso(card, features & NETIF_F_TSO6,
QETH_PROT_IPV6);
if (rc)
changed ^= NETIF_F_TSO6;
}
qeth_check_restricted_features(card, dev->features ^ features,
dev->features ^ changed);
/* everything changed successfully? */
if ((dev->features ^ features) == changed)
return 0;
/* something went wrong. save changed features and return error */
dev->features ^= changed;
return -EIO;
}
EXPORT_SYMBOL_GPL(qeth_set_features);
netdev_features_t qeth_fix_features(struct net_device *dev,
netdev_features_t features)
{
struct qeth_card *card = dev->ml_priv;
QETH_CARD_TEXT(card, 2, "fixfeat");
if (!qeth_is_supported(card, IPA_OUTBOUND_CHECKSUM))
features &= ~NETIF_F_IP_CSUM;
if (!qeth_is_supported6(card, IPA_OUTBOUND_CHECKSUM_V6))
features &= ~NETIF_F_IPV6_CSUM;
if (!qeth_is_supported(card, IPA_INBOUND_CHECKSUM) &&
!qeth_is_supported6(card, IPA_INBOUND_CHECKSUM_V6))
features &= ~NETIF_F_RXCSUM;
if (!qeth_is_supported(card, IPA_OUTBOUND_TSO))
features &= ~NETIF_F_TSO;
if (!qeth_is_supported6(card, IPA_OUTBOUND_TSO))
features &= ~NETIF_F_TSO6;
QETH_CARD_HEX(card, 2, &features, sizeof(features));
return features;
}
EXPORT_SYMBOL_GPL(qeth_fix_features);
netdev_features_t qeth_features_check(struct sk_buff *skb,
struct net_device *dev,
netdev_features_t features)
{
/* Traffic with local next-hop is not eligible for some offloads: */
if (skb->ip_summed == CHECKSUM_PARTIAL) {
struct qeth_card *card = dev->ml_priv;
netdev_features_t restricted = 0;
if (skb_is_gso(skb) && !netif_needs_gso(skb, features))
restricted |= NETIF_F_ALL_TSO;
switch (vlan_get_protocol(skb)) {
case htons(ETH_P_IP):
if (!card->info.has_lp2lp_cso_v4)
restricted |= NETIF_F_IP_CSUM;
if (restricted && qeth_next_hop_is_local_v4(card, skb))
features &= ~restricted;
break;
case htons(ETH_P_IPV6):
if (!card->info.has_lp2lp_cso_v6)
restricted |= NETIF_F_IPV6_CSUM;
if (restricted && qeth_next_hop_is_local_v6(card, skb))
features &= ~restricted;
break;
default:
break;
}
}
/* GSO segmentation builds skbs with
* a (small) linear part for the headers, and
* page frags for the data.
* Compared to a linear skb, the header-only part consumes an
* additional buffer element. This reduces buffer utilization, and
* hurts throughput. So compress small segments into one element.
*/
if (netif_needs_gso(skb, features)) {
/* match skb_segment(): */
unsigned int doffset = skb->data - skb_mac_header(skb);
unsigned int hsize = skb_shinfo(skb)->gso_size;
unsigned int hroom = skb_headroom(skb);
/* linearize only if resulting skb allocations are order-0: */
if (SKB_DATA_ALIGN(hroom + doffset + hsize) <= SKB_MAX_HEAD(0))
features &= ~NETIF_F_SG;
}
return vlan_features_check(skb, features);
}
EXPORT_SYMBOL_GPL(qeth_features_check);
void qeth_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
{
struct qeth_card *card = dev->ml_priv;
struct qeth_qdio_out_q *queue;
unsigned int i;
QETH_CARD_TEXT(card, 5, "getstat");
stats->rx_packets = card->stats.rx_packets;
stats->rx_bytes = card->stats.rx_bytes;
stats->rx_errors = card->stats.rx_length_errors +
card->stats.rx_frame_errors +
card->stats.rx_fifo_errors;
stats->rx_dropped = card->stats.rx_dropped_nomem +
card->stats.rx_dropped_notsupp +
card->stats.rx_dropped_runt;
stats->multicast = card->stats.rx_multicast;
stats->rx_length_errors = card->stats.rx_length_errors;
stats->rx_frame_errors = card->stats.rx_frame_errors;
stats->rx_fifo_errors = card->stats.rx_fifo_errors;
for (i = 0; i < card->qdio.no_out_queues; i++) {
queue = card->qdio.out_qs[i];
stats->tx_packets += queue->stats.tx_packets;
stats->tx_bytes += queue->stats.tx_bytes;
stats->tx_errors += queue->stats.tx_errors;
stats->tx_dropped += queue->stats.tx_dropped;
}
}
EXPORT_SYMBOL_GPL(qeth_get_stats64);
#define TC_IQD_UCAST 0
static void qeth_iqd_set_prio_tc_map(struct net_device *dev,
unsigned int ucast_txqs)
{
unsigned int prio;
/* IQD requires mcast traffic to be placed on a dedicated queue, and
* qeth_iqd_select_queue() deals with this.
* For unicast traffic, we defer the queue selection to the stack.
* By installing a trivial prio map that spans over only the unicast
* queues, we can encourage the stack to spread the ucast traffic evenly
* without selecting the mcast queue.
*/
/* One traffic class, spanning over all active ucast queues: */
netdev_set_num_tc(dev, 1);
netdev_set_tc_queue(dev, TC_IQD_UCAST, ucast_txqs,
QETH_IQD_MIN_UCAST_TXQ);
/* Map all priorities to this traffic class: */
for (prio = 0; prio <= TC_BITMASK; prio++)
netdev_set_prio_tc_map(dev, prio, TC_IQD_UCAST);
}
int qeth_set_real_num_tx_queues(struct qeth_card *card, unsigned int count)
{
struct net_device *dev = card->dev;
int rc;
/* Per netif_setup_tc(), adjust the mapping first: */
if (IS_IQD(card))
qeth_iqd_set_prio_tc_map(dev, count - 1);
rc = netif_set_real_num_tx_queues(dev, count);
if (rc && IS_IQD(card))
qeth_iqd_set_prio_tc_map(dev, dev->real_num_tx_queues - 1);
return rc;
}
u16 qeth_iqd_select_queue(struct net_device *dev, struct sk_buff *skb,
u8 cast_type, struct net_device *sb_dev)
{
u16 txq;
if (cast_type != RTN_UNICAST)
return QETH_IQD_MCAST_TXQ;
if (dev->real_num_tx_queues == QETH_IQD_MIN_TXQ)
return QETH_IQD_MIN_UCAST_TXQ;
txq = netdev_pick_tx(dev, skb, sb_dev);
return (txq == QETH_IQD_MCAST_TXQ) ? QETH_IQD_MIN_UCAST_TXQ : txq;
}
EXPORT_SYMBOL_GPL(qeth_iqd_select_queue);
int qeth_open(struct net_device *dev)
{
struct qeth_card *card = dev->ml_priv;
QETH_CARD_TEXT(card, 4, "qethopen");
card->data.state = CH_STATE_UP;
netif_tx_start_all_queues(dev);
napi_enable(&card->napi);
local_bh_disable();
napi_schedule(&card->napi);
if (IS_IQD(card)) {
struct qeth_qdio_out_q *queue;
unsigned int i;
qeth_for_each_output_queue(card, queue, i) {
netif_tx_napi_add(dev, &queue->napi, qeth_tx_poll,
QETH_NAPI_WEIGHT);
napi_enable(&queue->napi);
napi_schedule(&queue->napi);
}
}
/* kick-start the NAPI softirq: */
local_bh_enable();
return 0;
}
EXPORT_SYMBOL_GPL(qeth_open);
int qeth_stop(struct net_device *dev)
{
struct qeth_card *card = dev->ml_priv;
QETH_CARD_TEXT(card, 4, "qethstop");
if (IS_IQD(card)) {
struct qeth_qdio_out_q *queue;
unsigned int i;
/* Quiesce the NAPI instances: */
qeth_for_each_output_queue(card, queue, i)
napi_disable(&queue->napi);
/* Stop .ndo_start_xmit, might still access queue->napi. */
netif_tx_disable(dev);
qeth_for_each_output_queue(card, queue, i) {
del_timer_sync(&queue->timer);
/* Queues may get re-allocated, so remove the NAPIs. */
netif_napi_del(&queue->napi);
}
} else {
netif_tx_disable(dev);
}
napi_disable(&card->napi);
qdio_stop_irq(CARD_DDEV(card));
return 0;
}
EXPORT_SYMBOL_GPL(qeth_stop);
static int __init qeth_core_init(void)
{
int rc;
pr_info("loading core functions\n");
qeth_debugfs_root = debugfs_create_dir("qeth", NULL);
rc = qeth_register_dbf_views();
if (rc)
goto dbf_err;
qeth_core_root_dev = root_device_register("qeth");
rc = PTR_ERR_OR_ZERO(qeth_core_root_dev);
if (rc)
goto register_err;
qeth_core_header_cache =
kmem_cache_create("qeth_hdr", QETH_HDR_CACHE_OBJ_SIZE,
roundup_pow_of_two(QETH_HDR_CACHE_OBJ_SIZE),
0, NULL);
if (!qeth_core_header_cache) {
rc = -ENOMEM;
goto slab_err;
}
qeth_qdio_outbuf_cache = kmem_cache_create("qeth_buf",
sizeof(struct qeth_qdio_out_buffer), 0, 0, NULL);
if (!qeth_qdio_outbuf_cache) {
rc = -ENOMEM;
goto cqslab_err;
}
rc = ccw_driver_register(&qeth_ccw_driver);
if (rc)
goto ccw_err;
rc = ccwgroup_driver_register(&qeth_core_ccwgroup_driver);
if (rc)
goto ccwgroup_err;
return 0;
ccwgroup_err:
ccw_driver_unregister(&qeth_ccw_driver);
ccw_err:
kmem_cache_destroy(qeth_qdio_outbuf_cache);
cqslab_err:
kmem_cache_destroy(qeth_core_header_cache);
slab_err:
root_device_unregister(qeth_core_root_dev);
register_err:
qeth_unregister_dbf_views();
dbf_err:
debugfs_remove_recursive(qeth_debugfs_root);
pr_err("Initializing the qeth device driver failed\n");
return rc;
}
static void __exit qeth_core_exit(void)
{
qeth_clear_dbf_list();
ccwgroup_driver_unregister(&qeth_core_ccwgroup_driver);
ccw_driver_unregister(&qeth_ccw_driver);
kmem_cache_destroy(qeth_qdio_outbuf_cache);
kmem_cache_destroy(qeth_core_header_cache);
root_device_unregister(qeth_core_root_dev);
qeth_unregister_dbf_views();
debugfs_remove_recursive(qeth_debugfs_root);
pr_info("core functions removed\n");
}
module_init(qeth_core_init);
module_exit(qeth_core_exit);
MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
MODULE_DESCRIPTION("qeth core functions");
MODULE_LICENSE("GPL");
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