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coral / linux-mtk / 578f720cf7ccf226c280579afb2a7d2d8cedacaa / . / drivers / s390 / net / qeth_core_main.c
blob: 5f59e2dfc7db94b5de73eb5d45d1a0aae068e8de [file] [log] [blame]
// 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/ip.h>
#include <linux/tcp.h>
#include <linux/mii.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/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 qeth_card_list_struct qeth_core_card_list;
EXPORT_SYMBOL_GPL(qeth_core_card_list);
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 lock_class_key qdio_out_skb_queue_key;
static struct mutex qeth_mod_mutex;
static void qeth_send_control_data_cb(struct qeth_channel *,
struct qeth_cmd_buffer *);
static struct qeth_cmd_buffer *qeth_get_buffer(struct qeth_channel *);
static void qeth_free_buffer_pool(struct qeth_card *);
static int qeth_qdio_establish(struct qeth_card *);
static void qeth_free_qdio_buffers(struct qeth_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_release_skbs(struct qeth_qdio_out_buffer *buf);
static int qeth_init_qdio_out_buf(struct qeth_qdio_out_q *, int);
struct workqueue_struct *qeth_wq;
EXPORT_SYMBOL_GPL(qeth_wq);
int qeth_card_hw_is_reachable(struct qeth_card *card)
{
return (card->state == CARD_STATE_SOFTSETUP) ||
(card->state == CARD_STATE_UP);
}
EXPORT_SYMBOL_GPL(qeth_card_hw_is_reachable);
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");
rtnl_lock();
dev_close(card->dev);
rtnl_unlock();
ccwgroup_set_offline(card->gdev);
}
void qeth_close_dev(struct qeth_card *card)
{
QETH_CARD_TEXT(card, 2, "cldevsubm");
queue_work(qeth_wq, &card->close_dev_work);
}
EXPORT_SYMBOL_GPL(qeth_close_dev);
static const char *qeth_get_cardname(struct qeth_card *card)
{
if (card->info.guestlan) {
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 (card->info.guestlan) {
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_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_recovery_task(struct qeth_card *card)
{
card->recovery_task = current;
}
EXPORT_SYMBOL_GPL(qeth_set_recovery_task);
void qeth_clear_recovery_task(struct qeth_card *card)
{
card->recovery_task = NULL;
}
EXPORT_SYMBOL_GPL(qeth_clear_recovery_task);
static bool qeth_is_recovery_task(const struct qeth_card *card)
{
return card->recovery_task == current;
}
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);
int qeth_wait_for_threads(struct qeth_card *card, unsigned long threads)
{
if (qeth_is_recovery_task(card))
return 0;
return wait_event_interruptible(card->wait_q,
qeth_threads_running(card, threads) == 0);
}
EXPORT_SYMBOL_GPL(qeth_wait_for_threads);
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 int qeth_alloc_buffer_pool(struct qeth_card *card)
{
struct qeth_buffer_pool_entry *pool_entry;
void *ptr;
int i, j;
QETH_CARD_TEXT(card, 5, "alocpool");
for (i = 0; i < card->qdio.init_pool.buf_count; ++i) {
pool_entry = kzalloc(sizeof(*pool_entry), GFP_KERNEL);
if (!pool_entry) {
qeth_free_buffer_pool(card);
return -ENOMEM;
}
for (j = 0; j < QETH_MAX_BUFFER_ELEMENTS(card); ++j) {
ptr = (void *) __get_free_page(GFP_KERNEL);
if (!ptr) {
while (j > 0)
free_page((unsigned long)
pool_entry->elements[--j]);
kfree(pool_entry);
qeth_free_buffer_pool(card);
return -ENOMEM;
}
pool_entry->elements[j] = ptr;
}
list_add(&pool_entry->init_list,
&card->qdio.init_pool.entry_list);
}
return 0;
}
int qeth_realloc_buffer_pool(struct qeth_card *card, int bufcnt)
{
QETH_CARD_TEXT(card, 2, "realcbp");
if ((card->state != CARD_STATE_DOWN) &&
(card->state != CARD_STATE_RECOVER))
return -EPERM;
/* TODO: steel/add buffers from/to a running card's buffer pool (?) */
qeth_clear_working_pool_list(card);
qeth_free_buffer_pool(card);
card->qdio.in_buf_pool.buf_count = bufcnt;
card->qdio.init_pool.buf_count = bufcnt;
return qeth_alloc_buffer_pool(card);
}
EXPORT_SYMBOL_GPL(qeth_realloc_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_DBF_TEXT(SETUP, 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_DBF_TEXT_(SETUP, 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_DBF_TEXT(SETUP, 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_DBF_TEXT(SETUP, 2, "nocq");
card->qdio.c_q = NULL;
card->qdio.no_in_queues = 1;
}
QETH_DBF_TEXT_(SETUP, 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_release_skbs(c);
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++) {
if (aob->sba[i] && buffer->is_header[i])
kmem_cache_free(qeth_core_header_cache,
(void *) aob->sba[i]);
}
atomic_set(&buffer->state, QETH_QDIO_BUF_HANDLED_DELAYED);
qdio_release_aob(aob);
}
static inline int qeth_is_cq(struct qeth_card *card, unsigned int queue)
{
return card->options.cq == QETH_CQ_ENABLED &&
card->qdio.c_q != NULL &&
queue != 0 &&
queue == card->qdio.no_in_queues - 1;
}
static void qeth_setup_ccw(struct ccw1 *ccw, u8 cmd_code, u32 len, void *data)
{
ccw->cmd_code = cmd_code;
ccw->flags = CCW_FLAG_SLI;
ccw->count = len;
ccw->cda = (__u32) __pa(data);
}
static int __qeth_issue_next_read(struct qeth_card *card)
{
struct qeth_channel *channel = &card->read;
struct qeth_cmd_buffer *iob;
int rc;
QETH_CARD_TEXT(card, 5, "issnxrd");
if (channel->state != CH_STATE_UP)
return -EIO;
iob = qeth_get_buffer(channel);
if (!iob) {
dev_warn(&card->gdev->dev, "The qeth device driver "
"failed to recover an error on the device\n");
QETH_DBF_MESSAGE(2, "%s issue_next_read failed: no iob "
"available\n", dev_name(&card->gdev->dev));
return -ENOMEM;
}
qeth_setup_ccw(channel->ccw, CCW_CMD_READ, QETH_BUFSIZE, iob->data);
QETH_CARD_TEXT(card, 6, "noirqpnd");
rc = ccw_device_start(channel->ccwdev, channel->ccw,
(addr_t) iob, 0, 0);
if (rc) {
QETH_DBF_MESSAGE(2, "%s error in starting next read ccw! "
"rc=%i\n", dev_name(&card->gdev->dev), rc);
atomic_set(&channel->irq_pending, 0);
qeth_release_buffer(channel, iob);
card->read_or_write_problem = 1;
qeth_schedule_recovery(card);
wake_up(&card->wait_q);
}
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 struct qeth_reply *qeth_alloc_reply(struct qeth_card *card)
{
struct qeth_reply *reply;
reply = kzalloc(sizeof(struct qeth_reply), GFP_ATOMIC);
if (reply) {
refcount_set(&reply->refcnt, 1);
atomic_set(&reply->received, 0);
reply->card = card;
}
return reply;
}
static void qeth_get_reply(struct qeth_reply *reply)
{
refcount_inc(&reply->refcnt);
}
static void qeth_put_reply(struct qeth_reply *reply)
{
if (refcount_dec_and_test(&reply->refcnt))
kfree(reply);
}
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%X) for %s/%s returned "
"x%X \"%s\"\n",
ipa_name, com, dev_name(&card->gdev->dev),
QETH_CARD_IFNAME(card), rc,
qeth_get_ipa_msg(rc));
else
QETH_DBF_MESSAGE(5, "IPA: %s(x%X) for %s/%s succeeded\n",
ipa_name, com, dev_name(&card->gdev->dev),
QETH_CARD_IFNAME(card));
}
static struct qeth_ipa_cmd *qeth_check_ipa_data(struct qeth_card *card,
struct qeth_cmd_buffer *iob)
{
struct qeth_ipa_cmd *cmd = NULL;
QETH_CARD_TEXT(card, 5, "chkipad");
if (IS_IPA(iob->data)) {
cmd = (struct qeth_ipa_cmd *) PDU_ENCAPSULATION(iob->data);
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;
} else {
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));
qeth_close_dev(card);
} 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);
}
card->lan_online = 0;
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);
netif_carrier_on(card->dev);
card->lan_online = 1;
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;
else
return NULL;
case IPA_CMD_MODCCID:
return cmd;
case IPA_CMD_REGISTER_LOCAL_ADDR:
QETH_CARD_TEXT(card, 3, "irla");
break;
case IPA_CMD_UNREGISTER_LOCAL_ADDR:
QETH_CARD_TEXT(card, 3, "urla");
break;
default:
QETH_DBF_MESSAGE(2, "Received data is IPA "
"but not a reply!\n");
break;
}
}
}
return cmd;
}
void qeth_clear_ipacmd_list(struct qeth_card *card)
{
struct qeth_reply *reply, *r;
unsigned long flags;
QETH_CARD_TEXT(card, 4, "clipalst");
spin_lock_irqsave(&card->lock, flags);
list_for_each_entry_safe(reply, r, &card->cmd_waiter_list, list) {
qeth_get_reply(reply);
reply->rc = -EIO;
atomic_inc(&reply->received);
list_del_init(&reply->list);
wake_up(&reply->wait_q);
qeth_put_reply(reply);
}
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)
{
if (!buffer)
return 0;
QETH_DBF_HEX(CTRL, 2, buffer, QETH_DBF_CTRL_LEN);
if ((buffer[2] & 0xc0) == 0xc0) {
QETH_DBF_MESSAGE(2, "received an IDX TERMINATE with cause code %#02x\n",
buffer[4]);
QETH_CARD_TEXT(card, 2, "ckidxres");
QETH_CARD_TEXT(card, 2, " idxterm");
QETH_CARD_TEXT_(card, 2, " rc%d", -EIO);
if (buffer[4] == 0xf6) {
dev_err(&card->gdev->dev,
"The qeth device is not configured "
"for the OSI layer required by z/VM\n");
return -EPERM;
}
return -EIO;
}
return 0;
}
static struct qeth_card *CARD_FROM_CDEV(struct ccw_device *cdev)
{
struct qeth_card *card = dev_get_drvdata(&((struct ccwgroup_device *)
dev_get_drvdata(&cdev->dev))->dev);
return card;
}
static struct qeth_cmd_buffer *__qeth_get_buffer(struct qeth_channel *channel)
{
__u8 index;
QETH_CARD_TEXT(CARD_FROM_CDEV(channel->ccwdev), 6, "getbuff");
index = channel->io_buf_no;
do {
if (channel->iob[index].state == BUF_STATE_FREE) {
channel->iob[index].state = BUF_STATE_LOCKED;
channel->io_buf_no = (channel->io_buf_no + 1) %
QETH_CMD_BUFFER_NO;
memset(channel->iob[index].data, 0, QETH_BUFSIZE);
return channel->iob + index;
}
index = (index + 1) % QETH_CMD_BUFFER_NO;
} while (index != channel->io_buf_no);
return NULL;
}
void qeth_release_buffer(struct qeth_channel *channel,
struct qeth_cmd_buffer *iob)
{
unsigned long flags;
QETH_CARD_TEXT(CARD_FROM_CDEV(channel->ccwdev), 6, "relbuff");
spin_lock_irqsave(&channel->iob_lock, flags);
memset(iob->data, 0, QETH_BUFSIZE);
iob->state = BUF_STATE_FREE;
iob->callback = qeth_send_control_data_cb;
iob->rc = 0;
spin_unlock_irqrestore(&channel->iob_lock, flags);
wake_up(&channel->wait_q);
}
EXPORT_SYMBOL_GPL(qeth_release_buffer);
static struct qeth_cmd_buffer *qeth_get_buffer(struct qeth_channel *channel)
{
struct qeth_cmd_buffer *buffer = NULL;
unsigned long flags;
spin_lock_irqsave(&channel->iob_lock, flags);
buffer = __qeth_get_buffer(channel);
spin_unlock_irqrestore(&channel->iob_lock, flags);
return buffer;
}
struct qeth_cmd_buffer *qeth_wait_for_buffer(struct qeth_channel *channel)
{
struct qeth_cmd_buffer *buffer;
wait_event(channel->wait_q,
((buffer = qeth_get_buffer(channel)) != NULL));
return buffer;
}
EXPORT_SYMBOL_GPL(qeth_wait_for_buffer);
void qeth_clear_cmd_buffers(struct qeth_channel *channel)
{
int cnt;
for (cnt = 0; cnt < QETH_CMD_BUFFER_NO; cnt++)
qeth_release_buffer(channel, &channel->iob[cnt]);
channel->io_buf_no = 0;
}
EXPORT_SYMBOL_GPL(qeth_clear_cmd_buffers);
static void qeth_send_control_data_cb(struct qeth_channel *channel,
struct qeth_cmd_buffer *iob)
{
struct qeth_card *card;
struct qeth_reply *reply, *r;
struct qeth_ipa_cmd *cmd;
unsigned long flags;
int keep_reply;
int rc = 0;
card = CARD_FROM_CDEV(channel->ccwdev);
QETH_CARD_TEXT(card, 4, "sndctlcb");
rc = qeth_check_idx_response(card, iob->data);
switch (rc) {
case 0:
break;
case -EIO:
qeth_clear_ipacmd_list(card);
qeth_schedule_recovery(card);
/* fall through */
default:
goto out;
}
cmd = qeth_check_ipa_data(card, iob);
if ((cmd == NULL) && (card->state != CARD_STATE_DOWN))
goto out;
/*in case of OSN : check if cmd is set */
if (card->info.type == QETH_CARD_TYPE_OSN &&
cmd &&
cmd->hdr.command != IPA_CMD_STARTLAN &&
card->osn_info.assist_cb != NULL) {
card->osn_info.assist_cb(card->dev, cmd);
goto out;
}
spin_lock_irqsave(&card->lock, flags);
list_for_each_entry_safe(reply, r, &card->cmd_waiter_list, list) {
if ((reply->seqno == QETH_IDX_COMMAND_SEQNO) ||
((cmd) && (reply->seqno == cmd->hdr.seqno))) {
qeth_get_reply(reply);
list_del_init(&reply->list);
spin_unlock_irqrestore(&card->lock, flags);
keep_reply = 0;
if (reply->callback != NULL) {
if (cmd) {
reply->offset = (__u16)((char *)cmd -
(char *)iob->data);
keep_reply = reply->callback(card,
reply,
(unsigned long)cmd);
} else
keep_reply = reply->callback(card,
reply,
(unsigned long)iob);
}
if (cmd)
reply->rc = (u16) cmd->hdr.return_code;
else if (iob->rc)
reply->rc = iob->rc;
if (keep_reply) {
spin_lock_irqsave(&card->lock, flags);
list_add_tail(&reply->list,
&card->cmd_waiter_list);
spin_unlock_irqrestore(&card->lock, flags);
} else {
atomic_inc(&reply->received);
wake_up(&reply->wait_q);
}
qeth_put_reply(reply);
goto out;
}
}
spin_unlock_irqrestore(&card->lock, flags);
out:
memcpy(&card->seqno.pdu_hdr_ack,
QETH_PDU_HEADER_SEQ_NO(iob->data),
QETH_SEQ_NO_LENGTH);
qeth_release_buffer(channel, iob);
}
static int qeth_set_thread_start_bit(struct qeth_card *card,
unsigned long thread)
{
unsigned long flags;
spin_lock_irqsave(&card->thread_mask_lock, flags);
if (!(card->thread_allowed_mask & thread) ||
(card->thread_start_mask & thread)) {
spin_unlock_irqrestore(&card->thread_mask_lock, flags);
return -EPERM;
}
card->thread_start_mask |= thread;
spin_unlock_irqrestore(&card->thread_mask_lock, flags);
return 0;
}
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);
}
EXPORT_SYMBOL_GPL(qeth_clear_thread_start_bit);
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);
}
EXPORT_SYMBOL_GPL(qeth_clear_thread_running_bit);
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;
}
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;
}
EXPORT_SYMBOL_GPL(qeth_do_run_thread);
void qeth_schedule_recovery(struct qeth_card *card)
{
QETH_CARD_TEXT(card, 2, "startrec");
if (qeth_set_thread_start_bit(card, QETH_RECOVER_THREAD) == 0)
schedule_work(&card->kernel_thread_starter);
}
EXPORT_SYMBOL_GPL(qeth_schedule_recovery);
static int qeth_get_problem(struct ccw_device *cdev, struct irb *irb)
{
int dstat, cstat;
char *sense;
struct qeth_card *card;
sense = (char *) irb->ecw;
cstat = irb->scsw.cmd.cstat;
dstat = irb->scsw.cmd.dstat;
card = CARD_FROM_CDEV(cdev);
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, "%s check on device dstat=x%x, cstat=x%x\n",
dev_name(&cdev->dev), dstat, cstat);
print_hex_dump(KERN_WARNING, "qeth: irb ", DUMP_PREFIX_OFFSET,
16, 1, irb, 64, 1);
return 1;
}
if (dstat & DEV_STAT_UNIT_CHECK) {
if (sense[SENSE_RESETTING_EVENT_BYTE] &
SENSE_RESETTING_EVENT_FLAG) {
QETH_CARD_TEXT(card, 2, "REVIND");
return 1;
}
if (sense[SENSE_COMMAND_REJECT_BYTE] &
SENSE_COMMAND_REJECT_FLAG) {
QETH_CARD_TEXT(card, 2, "CMDREJi");
return 1;
}
if ((sense[2] == 0xaf) && (sense[3] == 0xfe)) {
QETH_CARD_TEXT(card, 2, "AFFE");
return 1;
}
if ((!sense[0]) && (!sense[1]) && (!sense[2]) && (!sense[3])) {
QETH_CARD_TEXT(card, 2, "ZEROSEN");
return 0;
}
QETH_CARD_TEXT(card, 2, "DGENCHK");
return 1;
}
return 0;
}
static long __qeth_check_irb_error(struct ccw_device *cdev,
unsigned long intparm, struct irb *irb)
{
struct qeth_card *card;
card = CARD_FROM_CDEV(cdev);
if (!card || !IS_ERR(irb))
return 0;
switch (PTR_ERR(irb)) {
case -EIO:
QETH_DBF_MESSAGE(2, "%s i/o-error on device\n",
dev_name(&cdev->dev));
QETH_CARD_TEXT(card, 2, "ckirberr");
QETH_CARD_TEXT_(card, 2, " rc%d", -EIO);
break;
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);
if (intparm == QETH_RCD_PARM) {
if (card->data.ccwdev == cdev) {
card->data.state = CH_STATE_DOWN;
wake_up(&card->wait_q);
}
}
break;
default:
QETH_DBF_MESSAGE(2, "%s unknown error %ld on device\n",
dev_name(&cdev->dev), PTR_ERR(irb));
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 qeth_channel *channel;
struct qeth_card *card;
card = CARD_FROM_CDEV(cdev);
if (!card)
return;
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 (qeth_intparm_is_iob(intparm))
iob = (struct qeth_cmd_buffer *) __va((addr_t)intparm);
if (__qeth_check_irb_error(cdev, intparm, irb)) {
/* IO was terminated, free its resources. */
if (iob)
qeth_release_buffer(iob->channel, iob);
atomic_set(&channel->irq_pending, 0);
wake_up(&card->wait_q);
return;
}
atomic_set(&channel->irq_pending, 0);
if (irb->scsw.cmd.fctl & (SCSW_FCTL_CLEAR_FUNC))
channel->state = CH_STATE_STOPPED;
if (irb->scsw.cmd.fctl & (SCSW_FCTL_HALT_FUNC))
channel->state = CH_STATE_HALTED;
/*let's wake up immediately on data channel*/
if ((channel == &card->data) && (intparm != 0) &&
(intparm != QETH_RCD_PARM))
goto out;
if (intparm == QETH_CLEAR_CHANNEL_PARM) {
QETH_CARD_TEXT(card, 6, "clrchpar");
/* we don't have to handle this further */
intparm = 0;
}
if (intparm == QETH_HALT_CHANNEL_PARM) {
QETH_CARD_TEXT(card, 6, "hltchpar");
/* we don't have to handle this further */
intparm = 0;
}
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, "%s sense data available. cstat "
"0x%X dstat 0x%X\n",
dev_name(&channel->ccwdev->dev), 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);
}
if (intparm == QETH_RCD_PARM) {
channel->state = CH_STATE_DOWN;
goto out;
}
rc = qeth_get_problem(cdev, irb);
if (rc) {
card->read_or_write_problem = 1;
if (iob)
qeth_release_buffer(iob->channel, iob);
qeth_clear_ipacmd_list(card);
qeth_schedule_recovery(card);
goto out;
}
}
if (intparm == QETH_RCD_PARM) {
channel->state = CH_STATE_RCD_DONE;
goto out;
}
if (channel == &card->data)
return;
if (channel == &card->read &&
channel->state == CH_STATE_UP)
__qeth_issue_next_read(card);
if (iob && iob->callback)
iob->callback(iob->channel, iob);
out:
wake_up(&card->wait_q);
return;
}
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;
if (skb_queue_empty(&buf->skb_list))
goto out;
skb = skb_peek(&buf->skb_list);
while (skb) {
QETH_CARD_TEXT_(q->card, 5, "skbn%d", notification);
QETH_CARD_TEXT_(q->card, 5, "%lx", (long) skb);
if (be16_to_cpu(skb->protocol) == ETH_P_AF_IUCV) {
if (skb->sk) {
struct iucv_sock *iucv = iucv_sk(skb->sk);
iucv->sk_txnotify(skb, notification);
}
}
if (skb_queue_is_last(&buf->skb_list, skb))
skb = NULL;
else
skb = skb_queue_next(&buf->skb_list, skb);
}
out:
return;
}
static void qeth_release_skbs(struct qeth_qdio_out_buffer *buf)
{
struct sk_buff *skb;
struct iucv_sock *iucv;
int notify_general_error = 0;
if (atomic_read(&buf->state) == QETH_QDIO_BUF_PENDING)
notify_general_error = 1;
/* release may never happen from within CQ tasklet scope */
WARN_ON_ONCE(atomic_read(&buf->state) == QETH_QDIO_BUF_IN_CQ);
skb = skb_dequeue(&buf->skb_list);
while (skb) {
QETH_CARD_TEXT(buf->q->card, 5, "skbr");
QETH_CARD_TEXT_(buf->q->card, 5, "%lx", (long) skb);
if (notify_general_error &&
be16_to_cpu(skb->protocol) == ETH_P_AF_IUCV) {
if (skb->sk) {
iucv = iucv_sk(skb->sk);
iucv->sk_txnotify(skb, TX_NOTIFY_GENERALERROR);
}
}
refcount_dec(&skb->users);
dev_kfree_skb_any(skb);
skb = skb_dequeue(&buf->skb_list);
}
}
static void qeth_clear_output_buffer(struct qeth_qdio_out_q *queue,
struct qeth_qdio_out_buffer *buf)
{
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_release_skbs(buf);
for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(queue->card); ++i) {
if (buf->buffer->element[i].addr && buf->is_header[i])
kmem_cache_free(qeth_core_header_cache,
buf->buffer->element[i].addr);
buf->is_header[i] = 0;
}
qeth_scrub_qdio_buffer(buf->buffer,
QETH_MAX_BUFFER_ELEMENTS(queue->card));
buf->next_element_to_fill = 0;
atomic_set(&buf->state, QETH_QDIO_BUF_EMPTY);
}
static void qeth_clear_outq_buffers(struct qeth_qdio_out_q *q, int 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]);
if (free) {
kmem_cache_free(qeth_qdio_outbuf_cache, q->bufs[j]);
q->bufs[j] = NULL;
}
}
}
void qeth_clear_qdio_buffers(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_clear_outq_buffers(card->qdio.out_qs[i], 0);
}
}
}
EXPORT_SYMBOL_GPL(qeth_clear_qdio_buffers);
static void qeth_free_buffer_pool(struct qeth_card *card)
{
struct qeth_buffer_pool_entry *pool_entry, *tmp;
int i = 0;
list_for_each_entry_safe(pool_entry, tmp,
&card->qdio.init_pool.entry_list, init_list){
for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i)
free_page((unsigned long)pool_entry->elements[i]);
list_del(&pool_entry->init_list);
kfree(pool_entry);
}
}
static void qeth_clean_channel(struct qeth_channel *channel)
{
struct ccw_device *cdev = channel->ccwdev;
int cnt;
QETH_DBF_TEXT(SETUP, 2, "freech");
spin_lock_irq(get_ccwdev_lock(cdev));
cdev->handler = NULL;
spin_unlock_irq(get_ccwdev_lock(cdev));
for (cnt = 0; cnt < QETH_CMD_BUFFER_NO; cnt++)
kfree(channel->iob[cnt].data);
kfree(channel->ccw);
}
static int qeth_setup_channel(struct qeth_channel *channel, bool alloc_buffers)
{
struct ccw_device *cdev = channel->ccwdev;
int cnt;
QETH_DBF_TEXT(SETUP, 2, "setupch");
channel->ccw = kmalloc(sizeof(struct ccw1), GFP_KERNEL | GFP_DMA);
if (!channel->ccw)
return -ENOMEM;
channel->state = CH_STATE_DOWN;
atomic_set(&channel->irq_pending, 0);
init_waitqueue_head(&channel->wait_q);
spin_lock_irq(get_ccwdev_lock(cdev));
cdev->handler = qeth_irq;
spin_unlock_irq(get_ccwdev_lock(cdev));
if (!alloc_buffers)
return 0;
for (cnt = 0; cnt < QETH_CMD_BUFFER_NO; cnt++) {
channel->iob[cnt].data =
kzalloc(QETH_BUFSIZE, GFP_DMA|GFP_KERNEL);
if (channel->iob[cnt].data == NULL)
break;
channel->iob[cnt].state = BUF_STATE_FREE;
channel->iob[cnt].channel = channel;
channel->iob[cnt].callback = qeth_send_control_data_cb;
channel->iob[cnt].rc = 0;
}
if (cnt < QETH_CMD_BUFFER_NO) {
qeth_clean_channel(channel);
return -ENOMEM;
}
channel->io_buf_no = 0;
spin_lock_init(&channel->iob_lock);
return 0;
}
static void qeth_set_single_write_queues(struct qeth_card *card)
{
if ((atomic_read(&card->qdio.state) != QETH_QDIO_UNINITIALIZED) &&
(card->qdio.no_out_queues == 4))
qeth_free_qdio_buffers(card);
card->qdio.no_out_queues = 1;
if (card->qdio.default_out_queue != 0)
dev_info(&card->gdev->dev, "Priority Queueing not supported\n");
card->qdio.default_out_queue = 0;
}
static void qeth_set_multiple_write_queues(struct qeth_card *card)
{
if ((atomic_read(&card->qdio.state) != QETH_QDIO_UNINITIALIZED) &&
(card->qdio.no_out_queues == 1)) {
qeth_free_qdio_buffers(card);
card->qdio.default_out_queue = 2;
}
card->qdio.no_out_queues = 4;
}
static int qeth_update_from_chp_desc(struct qeth_card *card)
{
struct ccw_device *ccwdev;
struct channel_path_desc_fmt0 *chp_dsc;
QETH_DBF_TEXT(SETUP, 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 (card->info.type == QETH_CARD_TYPE_IQD)
goto out;
/* CHPP field bit 6 == 1 -> single queue */
if ((chp_dsc->chpp & 0x02) == 0x02)
qeth_set_single_write_queues(card);
else
qeth_set_multiple_write_queues(card);
out:
kfree(chp_dsc);
QETH_DBF_TEXT_(SETUP, 2, "nr:%x", card->qdio.no_out_queues);
QETH_DBF_TEXT_(SETUP, 2, "lvl:%02x", card->info.func_level);
return 0;
}
static void qeth_init_qdio_info(struct qeth_card *card)
{
QETH_DBF_TEXT(SETUP, 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;
card->qdio.no_out_queues = QETH_MAX_QUEUES;
/* inbound */
card->qdio.no_in_queues = 1;
card->qdio.in_buf_size = QETH_IN_BUF_SIZE_DEFAULT;
if (card->info.type == QETH_CARD_TYPE_IQD)
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.rx_sg_cb = QETH_RX_SG_CB;
card->options.isolation = ISOLATION_MODE_NONE;
card->options.cq = QETH_CQ_DISABLED;
}
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 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(card->discipline->recover, (void *)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_DBF_TEXT(SETUP, 2, "setupcrd");
QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
card->info.type = CARD_RDEV(card)->id.driver_info;
card->state = CARD_STATE_DOWN;
spin_lock_init(&card->mclock);
spin_lock_init(&card->lock);
spin_lock_init(&card->ip_lock);
spin_lock_init(&card->thread_mask_lock);
mutex_init(&card->conf_mutex);
mutex_init(&card->discipline_mutex);
mutex_init(&card->vid_list_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);
}
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;
CARD_RDEV(card) = gdev->cdev[0];
CARD_WDEV(card) = gdev->cdev[1];
CARD_DDEV(card) = gdev->cdev[2];
if (qeth_setup_channel(&card->read, true))
goto out_ip;
if (qeth_setup_channel(&card->write, true))
goto out_channel;
if (qeth_setup_channel(&card->data, false))
goto out_data;
card->options.layer2 = -1;
card->qeth_service_level.seq_print = qeth_core_sl_print;
register_service_level(&card->qeth_service_level);
return card;
out_data:
qeth_clean_channel(&card->write);
out_channel:
qeth_clean_channel(&card->read);
out_ip:
kfree(card);
out:
return NULL;
}
static int qeth_clear_channel(struct qeth_channel *channel)
{
unsigned long flags;
struct qeth_card *card;
int rc;
card = CARD_FROM_CDEV(channel->ccwdev);
QETH_CARD_TEXT(card, 3, "clearch");
spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
rc = ccw_device_clear(channel->ccwdev, QETH_CLEAR_CHANNEL_PARM);
spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);
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_channel *channel)
{
unsigned long flags;
struct qeth_card *card;
int rc;
card = CARD_FROM_CDEV(channel->ccwdev);
QETH_CARD_TEXT(card, 3, "haltch");
spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
rc = ccw_device_halt(channel->ccwdev, QETH_HALT_CHANNEL_PARM);
spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);
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;
}
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->read);
rc2 = qeth_halt_channel(&card->write);
rc3 = qeth_halt_channel(&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->read);
rc2 = qeth_clear_channel(&card->write);
rc3 = qeth_clear_channel(&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 (card->info.type == QETH_CARD_TYPE_IQD)
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);
card->state = CARD_STATE_DOWN;
return rc;
}
EXPORT_SYMBOL_GPL(qeth_qdio_clear_card);
static int qeth_read_conf_data(struct qeth_card *card, void **buffer,
int *length)
{
struct ciw *ciw;
char *rcd_buf;
int ret;
struct qeth_channel *channel = &card->data;
unsigned long flags;
/*
* 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;
rcd_buf = kzalloc(ciw->count, GFP_KERNEL | GFP_DMA);
if (!rcd_buf)
return -ENOMEM;
qeth_setup_ccw(channel->ccw, ciw->cmd, ciw->count, rcd_buf);
channel->state = CH_STATE_RCD;
spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
ret = ccw_device_start_timeout(channel->ccwdev, channel->ccw,
QETH_RCD_PARM, LPM_ANYPATH, 0,
QETH_RCD_TIMEOUT);
spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);
if (!ret)
wait_event(card->wait_q,
(channel->state == CH_STATE_RCD_DONE ||
channel->state == CH_STATE_DOWN));
if (channel->state == CH_STATE_DOWN)
ret = -EIO;
else
channel->state = CH_STATE_DOWN;
if (ret) {
kfree(rcd_buf);
*buffer = NULL;
*length = 0;
} else {
*length = ciw->count;
*buffer = rcd_buf;
}
return ret;
}
static void qeth_configure_unitaddr(struct qeth_card *card, char *prcd)
{
QETH_DBF_TEXT(SETUP, 2, "cfgunit");
card->info.chpid = prcd[30];
card->info.unit_addr2 = prcd[31];
card->info.cula = prcd[63];
card->info.guestlan = ((prcd[0x10] == _ascebc['V']) &&
(prcd[0x11] == _ascebc['M']));
}
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_DBF_TEXT(SETUP, 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_DBF_TEXT_(SETUP, 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 (card->info.type == QETH_CARD_TYPE_OSM ||
card->info.type == QETH_CARD_TYPE_OSN)
disc = QETH_DISCIPLINE_LAYER2;
else if (card->info.guestlan)
disc = (card->info.type == QETH_CARD_TYPE_IQD) ?
QETH_DISCIPLINE_LAYER3 :
qeth_vm_detect_layer(card);
switch (disc) {
case QETH_DISCIPLINE_LAYER2:
QETH_DBF_TEXT(SETUP, 3, "force l2");
break;
case QETH_DISCIPLINE_LAYER3:
QETH_DBF_TEXT(SETUP, 3, "force l3");
break;
default:
QETH_DBF_TEXT(SETUP, 3, "force no");
}
return disc;
}
static void qeth_configure_blkt_default(struct qeth_card *card, char *prcd)
{
QETH_DBF_TEXT(SETUP, 2, "cfgblkt");
if (prcd[74] == 0xF0 && prcd[75] == 0xF0 &&
prcd[76] >= 0xF1 && prcd[76] <= 0xF4) {
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_init_tokens(struct qeth_card *card)
{
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;
}
static void qeth_init_func_level(struct qeth_card *card)
{
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 int qeth_idx_activate_get_answer(struct qeth_channel *channel,
void (*idx_reply_cb)(struct qeth_channel *,
struct qeth_cmd_buffer *))
{
struct qeth_cmd_buffer *iob;
unsigned long flags;
int rc;
struct qeth_card *card;
QETH_DBF_TEXT(SETUP, 2, "idxanswr");
card = CARD_FROM_CDEV(channel->ccwdev);
iob = qeth_get_buffer(channel);
if (!iob)
return -ENOMEM;
iob->callback = idx_reply_cb;
qeth_setup_ccw(channel->ccw, CCW_CMD_READ, QETH_BUFSIZE, iob->data);
wait_event(card->wait_q,
atomic_cmpxchg(&channel->irq_pending, 0, 1) == 0);
QETH_DBF_TEXT(SETUP, 6, "noirqpnd");
spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
rc = ccw_device_start_timeout(channel->ccwdev, channel->ccw,
(addr_t) iob, 0, 0, QETH_TIMEOUT);
spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);
if (rc) {
QETH_DBF_MESSAGE(2, "Error2 in activating channel rc=%d\n", rc);
QETH_DBF_TEXT_(SETUP, 2, "2err%d", rc);
atomic_set(&channel->irq_pending, 0);
qeth_release_buffer(channel, iob);
wake_up(&card->wait_q);
return rc;
}
rc = wait_event_interruptible_timeout(card->wait_q,
channel->state == CH_STATE_UP, QETH_TIMEOUT);
if (rc == -ERESTARTSYS)
return rc;
if (channel->state != CH_STATE_UP) {
rc = -ETIME;
QETH_DBF_TEXT_(SETUP, 2, "3err%d", rc);
} else
rc = 0;
return rc;
}
static int qeth_idx_activate_channel(struct qeth_channel *channel,
void (*idx_reply_cb)(struct qeth_channel *,
struct qeth_cmd_buffer *))
{
struct qeth_card *card;
struct qeth_cmd_buffer *iob;
unsigned long flags;
__u16 temp;
__u8 tmp;
int rc;
struct ccw_dev_id temp_devid;
card = CARD_FROM_CDEV(channel->ccwdev);
QETH_DBF_TEXT(SETUP, 2, "idxactch");
iob = qeth_get_buffer(channel);
if (!iob)
return -ENOMEM;
iob->callback = idx_reply_cb;
qeth_setup_ccw(channel->ccw, CCW_CMD_WRITE, IDX_ACTIVATE_SIZE,
iob->data);
if (channel == &card->write) {
memcpy(iob->data, IDX_ACTIVATE_WRITE, IDX_ACTIVATE_SIZE);
memcpy(QETH_TRANSPORT_HEADER_SEQ_NO(iob->data),
&card->seqno.trans_hdr, QETH_SEQ_NO_LENGTH);
card->seqno.trans_hdr++;
} else {
memcpy(iob->data, IDX_ACTIVATE_READ, IDX_ACTIVATE_SIZE);
memcpy(QETH_TRANSPORT_HEADER_SEQ_NO(iob->data),
&card->seqno.trans_hdr, QETH_SEQ_NO_LENGTH);
}
tmp = ((u8)card->dev->dev_port) | 0x80;
memcpy(QETH_IDX_ACT_PNO(iob->data), &tmp, 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, sizeof(__u16));
ccw_device_get_id(CARD_DDEV(card), &temp_devid);
memcpy(QETH_IDX_ACT_QDIO_DEV_CUA(iob->data), &temp_devid.devno, 2);
temp = (card->info.cula << 8) + card->info.unit_addr2;
memcpy(QETH_IDX_ACT_QDIO_DEV_REALADDR(iob->data), &temp, 2);
wait_event(card->wait_q,
atomic_cmpxchg(&channel->irq_pending, 0, 1) == 0);
QETH_DBF_TEXT(SETUP, 6, "noirqpnd");
spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
rc = ccw_device_start_timeout(channel->ccwdev, channel->ccw,
(addr_t) iob, 0, 0, QETH_TIMEOUT);
spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);
if (rc) {
QETH_DBF_MESSAGE(2, "Error1 in activating channel. rc=%d\n",
rc);
QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
atomic_set(&channel->irq_pending, 0);
qeth_release_buffer(channel, iob);
wake_up(&card->wait_q);
return rc;
}
rc = wait_event_interruptible_timeout(card->wait_q,
channel->state == CH_STATE_ACTIVATING, QETH_TIMEOUT);
if (rc == -ERESTARTSYS)
return rc;
if (channel->state != CH_STATE_ACTIVATING) {
dev_warn(&channel->ccwdev->dev, "The qeth device driver"
" failed to recover an error on the device\n");
QETH_DBF_MESSAGE(2, "%s IDX activate timed out\n",
dev_name(&channel->ccwdev->dev));
QETH_DBF_TEXT_(SETUP, 2, "2err%d", -ETIME);
return -ETIME;
}
return qeth_idx_activate_get_answer(channel, idx_reply_cb);
}
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_idx_write_cb(struct qeth_channel *channel,
struct qeth_cmd_buffer *iob)
{
struct qeth_card *card;
__u16 temp;
QETH_DBF_TEXT(SETUP , 2, "idxwrcb");
if (channel->state == CH_STATE_DOWN) {
channel->state = CH_STATE_ACTIVATING;
goto out;
}
card = CARD_FROM_CDEV(channel->ccwdev);
if (!(QETH_IS_IDX_ACT_POS_REPLY(iob->data))) {
if (QETH_IDX_ACT_CAUSE_CODE(iob->data) == QETH_IDX_ACT_ERR_EXCL)
dev_err(&channel->ccwdev->dev,
"The adapter is used exclusively by another "
"host\n");
else
QETH_DBF_MESSAGE(2, "%s IDX_ACTIVATE on write channel:"
" negative reply\n",
dev_name(&channel->ccwdev->dev));
goto out;
}
memcpy(&temp, QETH_IDX_ACT_FUNC_LEVEL(iob->data), 2);
if ((temp & ~0x0100) != qeth_peer_func_level(card->info.func_level)) {
QETH_DBF_MESSAGE(2, "%s IDX_ACTIVATE on write channel: "
"function level mismatch (sent: 0x%x, received: "
"0x%x)\n", dev_name(&channel->ccwdev->dev),
card->info.func_level, temp);
goto out;
}
channel->state = CH_STATE_UP;
out:
qeth_release_buffer(channel, iob);
}
static void qeth_idx_read_cb(struct qeth_channel *channel,
struct qeth_cmd_buffer *iob)
{
struct qeth_card *card;
__u16 temp;
QETH_DBF_TEXT(SETUP , 2, "idxrdcb");
if (channel->state == CH_STATE_DOWN) {
channel->state = CH_STATE_ACTIVATING;
goto out;
}
card = CARD_FROM_CDEV(channel->ccwdev);
if (qeth_check_idx_response(card, iob->data))
goto out;
if (!(QETH_IS_IDX_ACT_POS_REPLY(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");
break;
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");
break;
default:
QETH_DBF_MESSAGE(2, "%s IDX_ACTIVATE on read channel:"
" negative reply\n",
dev_name(&channel->ccwdev->dev));
}
QETH_CARD_TEXT_(card, 2, "idxread%c",
QETH_IDX_ACT_CAUSE_CODE(iob->data));
goto out;
}
memcpy(&temp, QETH_IDX_ACT_FUNC_LEVEL(iob->data), 2);
if (temp != qeth_peer_func_level(card->info.func_level)) {
QETH_DBF_MESSAGE(2, "%s IDX_ACTIVATE on read channel: function "
"level mismatch (sent: 0x%x, received: 0x%x)\n",
dev_name(&channel->ccwdev->dev),
card->info.func_level, temp);
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);
channel->state = CH_STATE_UP;
out:
qeth_release_buffer(channel, iob);
}
void qeth_prepare_control_data(struct qeth_card *card, int len,
struct qeth_cmd_buffer *iob)
{
qeth_setup_ccw(iob->channel->ccw, CCW_CMD_WRITE, len, iob->data);
iob->callback = qeth_release_buffer;
memcpy(QETH_TRANSPORT_HEADER_SEQ_NO(iob->data),
&card->seqno.trans_hdr, QETH_SEQ_NO_LENGTH);
card->seqno.trans_hdr++;
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);
QETH_DBF_HEX(CTRL, 2, iob->data, QETH_DBF_CTRL_LEN);
}
EXPORT_SYMBOL_GPL(qeth_prepare_control_data);
/**
* qeth_send_control_data() - send control command to the card
* @card: qeth_card structure pointer
* @len: size of the command buffer
* @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
*
* Returns the value of the `return_code' field of the response
* block returned from the hardware, or other error indication.
* Value of zero indicates successful execution of the command.
*
* Callback function gets called one or more times, with cb_cmd
* pointing to the response returned by the hardware. Callback
* function must return non-zero if more reply blocks are expected,
* and zero if the last or only reply block is received. Callback
* function can get the value of the reply_param pointer from the
* field 'param' of the structure qeth_reply.
*/
int qeth_send_control_data(struct qeth_card *card, int len,
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;
int rc;
unsigned long flags;
struct qeth_reply *reply = NULL;
unsigned long timeout, event_timeout;
struct qeth_ipa_cmd *cmd = NULL;
QETH_CARD_TEXT(card, 2, "sendctl");
if (card->read_or_write_problem) {
qeth_release_buffer(channel, iob);
return -EIO;
}
reply = qeth_alloc_reply(card);
if (!reply) {
qeth_release_buffer(channel, iob);
return -ENOMEM;
}
reply->callback = reply_cb;
reply->param = reply_param;
init_waitqueue_head(&reply->wait_q);
while (atomic_cmpxchg(&channel->irq_pending, 0, 1)) ;
if (IS_IPA(iob->data)) {
cmd = __ipa_cmd(iob);
cmd->hdr.seqno = card->seqno.ipa++;
reply->seqno = cmd->hdr.seqno;
event_timeout = QETH_IPA_TIMEOUT;
} else {
reply->seqno = QETH_IDX_COMMAND_SEQNO;
event_timeout = QETH_TIMEOUT;
}
qeth_prepare_control_data(card, len, iob);
spin_lock_irqsave(&card->lock, flags);
list_add_tail(&reply->list, &card->cmd_waiter_list);
spin_unlock_irqrestore(&card->lock, flags);
timeout = jiffies + event_timeout;
QETH_CARD_TEXT(card, 6, "noirqpnd");
spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
rc = ccw_device_start_timeout(channel->ccwdev, channel->ccw,
(addr_t) iob, 0, 0, event_timeout);
spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);
if (rc) {
QETH_DBF_MESSAGE(2, "%s qeth_send_control_data: "
"ccw_device_start rc = %i\n",
dev_name(&channel->ccwdev->dev), rc);
QETH_CARD_TEXT_(card, 2, " err%d", rc);
spin_lock_irqsave(&card->lock, flags);
list_del_init(&reply->list);
qeth_put_reply(reply);
spin_unlock_irqrestore(&card->lock, flags);
qeth_release_buffer(channel, iob);
atomic_set(&channel->irq_pending, 0);
wake_up(&card->wait_q);
return rc;
}
/* we have only one long running ipassist, since we can ensure
process context of this command we can sleep */
if (cmd && cmd->hdr.command == IPA_CMD_SETIP &&
cmd->hdr.prot_version == QETH_PROT_IPV4) {
if (!wait_event_timeout(reply->wait_q,
atomic_read(&reply->received), event_timeout))
goto time_err;
} else {
while (!atomic_read(&reply->received)) {
if (time_after(jiffies, timeout))
goto time_err;
cpu_relax();
}
}
rc = reply->rc;
qeth_put_reply(reply);
return rc;
time_err:
reply->rc = -ETIME;
spin_lock_irqsave(&reply->card->lock, flags);
list_del_init(&reply->list);
spin_unlock_irqrestore(&reply->card->lock, flags);
atomic_inc(&reply->received);
rc = reply->rc;
qeth_put_reply(reply);
return rc;
}
EXPORT_SYMBOL_GPL(qeth_send_control_data);
static int qeth_cm_enable_cb(struct qeth_card *card, struct qeth_reply *reply,
unsigned long data)
{
struct qeth_cmd_buffer *iob;
QETH_DBF_TEXT(SETUP, 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);
QETH_DBF_TEXT_(SETUP, 2, " rc%d", iob->rc);
return 0;
}
static int qeth_cm_enable(struct qeth_card *card)
{
int rc;
struct qeth_cmd_buffer *iob;
QETH_DBF_TEXT(SETUP, 2, "cmenable");
iob = qeth_wait_for_buffer(&card->write);
memcpy(iob->data, CM_ENABLE, CM_ENABLE_SIZE);
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);
rc = qeth_send_control_data(card, CM_ENABLE_SIZE, iob,
qeth_cm_enable_cb, NULL);
return rc;
}
static int qeth_cm_setup_cb(struct qeth_card *card, struct qeth_reply *reply,
unsigned long data)
{
struct qeth_cmd_buffer *iob;
QETH_DBF_TEXT(SETUP, 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);
QETH_DBF_TEXT_(SETUP, 2, " rc%d", iob->rc);
return 0;
}
static int qeth_cm_setup(struct qeth_card *card)
{
int rc;
struct qeth_cmd_buffer *iob;
QETH_DBF_TEXT(SETUP, 2, "cmsetup");
iob = qeth_wait_for_buffer(&card->write);
memcpy(iob->data, CM_SETUP, CM_SETUP_SIZE);
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);
rc = qeth_send_control_data(card, CM_SETUP_SIZE, iob,
qeth_cm_setup_cb, NULL);
return rc;
}
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_buffers(card);
} else {
if (dev->mtu)
new_mtu = dev->mtu;
/* default MTUs for first setup: */
else if (card->options.layer2)
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_DBF_TEXT(SETUP, 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 (card->info.type == QETH_CARD_TYPE_IQD) {
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_DBF_TEXT_(SETUP, 2, "link%d", card->info.link_type);
QETH_DBF_TEXT_(SETUP, 2, " rc%d", iob->rc);
return 0;
}
static u8 qeth_mpc_select_prot_type(struct qeth_card *card)
{
if (IS_OSN(card))
return QETH_PROT_OSN2;
return (card->options.layer2 == 1) ? 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;
/*FIXME: trace view callbacks*/
QETH_DBF_TEXT(SETUP, 2, "ulpenabl");
iob = qeth_wait_for_buffer(&card->write);
memcpy(iob->data, ULP_ENABLE, ULP_ENABLE_SIZE);
*(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, ULP_ENABLE_SIZE, 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_DBF_TEXT(SETUP, 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_DBF_TEXT(SETUP, 2, "olmlimit");
dev_err(&card->gdev->dev, "A connection could not be "
"established because of an OLM limit\n");
iob->rc = -EMLINK;
}
QETH_DBF_TEXT_(SETUP, 2, " rc%d", iob->rc);
return 0;
}
static int qeth_ulp_setup(struct qeth_card *card)
{
int rc;
__u16 temp;
struct qeth_cmd_buffer *iob;
struct ccw_dev_id dev_id;
QETH_DBF_TEXT(SETUP, 2, "ulpsetup");
iob = qeth_wait_for_buffer(&card->write);
memcpy(iob->data, ULP_SETUP, ULP_SETUP_SIZE);
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);
rc = qeth_send_control_data(card, ULP_SETUP_SIZE, iob,
qeth_ulp_setup_cb, NULL);
return rc;
}
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_clear_outq_buffers(q, 1);
qdio_free_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
kfree(q);
}
static struct qeth_qdio_out_q *qeth_alloc_qdio_out_buf(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 int qeth_alloc_qdio_buffers(struct qeth_card *card)
{
int i, j;
QETH_DBF_TEXT(SETUP, 2, "allcqdbf");
if (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_UNINITIALIZED,
QETH_QDIO_ALLOCATED) != QETH_QDIO_UNINITIALIZED)
return 0;
QETH_DBF_TEXT(SETUP, 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 */
card->qdio.out_qs =
kcalloc(card->qdio.no_out_queues,
sizeof(struct qeth_qdio_out_q *),
GFP_KERNEL);
if (!card->qdio.out_qs)
goto out_freepool;
for (i = 0; i < card->qdio.no_out_queues; ++i) {
card->qdio.out_qs[i] = qeth_alloc_qdio_out_buf();
if (!card->qdio.out_qs[i])
goto out_freeoutq;
QETH_DBF_TEXT_(SETUP, 2, "outq %i", i);
QETH_DBF_HEX(SETUP, 2, &card->qdio.out_qs[i], sizeof(void *));
card->qdio.out_qs[i]->queue_no = i;
/* give outbound qeth_qdio_buffers their qdio_buffers */
for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
WARN_ON(card->qdio.out_qs[i]->bufs[j] != NULL);
if (qeth_init_qdio_out_buf(card->qdio.out_qs[i], 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]);
kfree(card->qdio.out_qs);
card->qdio.out_qs = NULL;
out_freepool:
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_buffers(struct qeth_card *card)
{
int i, j;
if (atomic_xchg(&card->qdio.state, QETH_QDIO_UNINITIALIZED) ==
QETH_QDIO_UNINITIALIZED)
return;
qeth_free_cq(card);
cancel_delayed_work_sync(&card->buffer_reclaim_work);
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 */
if (card->qdio.out_qs) {
for (i = 0; i < card->qdio.no_out_queues; i++)
qeth_free_output_queue(card->qdio.out_qs[i]);
kfree(card->qdio.out_qs);
card->qdio.out_qs = 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_DBF_TEXT(SETUP, 3, "qdioact");
return qdio_activate(CARD_DDEV(card));
}
static int qeth_dm_act(struct qeth_card *card)
{
int rc;
struct qeth_cmd_buffer *iob;
QETH_DBF_TEXT(SETUP, 2, "dmact");
iob = qeth_wait_for_buffer(&card->write);
memcpy(iob->data, DM_ACT, DM_ACT_SIZE);
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);
rc = qeth_send_control_data(card, DM_ACT_SIZE, iob, NULL, NULL);
return rc;
}
static int qeth_mpc_initialize(struct qeth_card *card)
{
int rc;
QETH_DBF_TEXT(SETUP, 2, "mpcinit");
rc = qeth_issue_next_read(card);
if (rc) {
QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
return rc;
}
rc = qeth_cm_enable(card);
if (rc) {
QETH_DBF_TEXT_(SETUP, 2, "2err%d", rc);
goto out_qdio;
}
rc = qeth_cm_setup(card);
if (rc) {
QETH_DBF_TEXT_(SETUP, 2, "3err%d", rc);
goto out_qdio;
}
rc = qeth_ulp_enable(card);
if (rc) {
QETH_DBF_TEXT_(SETUP, 2, "4err%d", rc);
goto out_qdio;
}
rc = qeth_ulp_setup(card);
if (rc) {
QETH_DBF_TEXT_(SETUP, 2, "5err%d", rc);
goto out_qdio;
}
rc = qeth_alloc_qdio_buffers(card);
if (rc) {
QETH_DBF_TEXT_(SETUP, 2, "5err%d", rc);
goto out_qdio;
}
rc = qeth_qdio_establish(card);
if (rc) {
QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);
qeth_free_qdio_buffers(card);
goto out_qdio;
}
rc = qeth_qdio_activate(card);
if (rc) {
QETH_DBF_TEXT_(SETUP, 2, "7err%d", rc);
goto out_qdio;
}
rc = qeth_dm_act(card);
if (rc) {
QETH_DBF_TEXT_(SETUP, 2, "8err%d", rc);
goto out_qdio;
}
return 0;
out_qdio:
qeth_qdio_clear_card(card, card->info.type != QETH_CARD_TYPE_IQD);
qdio_free(CARD_DDEV(card));
return rc;
}
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 ((card->info.guestlan) ||
(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 list_head *plh;
struct qeth_buffer_pool_entry *entry;
int i, free;
struct page *page;
if (list_empty(&card->qdio.in_buf_pool.entry_list))
return NULL;
list_for_each(plh, &card->qdio.in_buf_pool.entry_list) {
entry = list_entry(plh, struct qeth_buffer_pool_entry, list);
free = 1;
for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
if (page_count(virt_to_page(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_entry(card->qdio.in_buf_pool.entry_list.next,
struct qeth_buffer_pool_entry, list);
for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
if (page_count(virt_to_page(entry->elements[i])) > 1) {
page = alloc_page(GFP_ATOMIC);
if (!page) {
return NULL;
} else {
free_page((unsigned long)entry->elements[i]);
entry->elements[i] = page_address(page);
if (card->options.performance_stats)
card->perf_stats.sg_alloc_page_rx++;
}
}
}
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,
QETH_RX_PULL_LEN + ETH_HLEN);
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 = 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;
}
int qeth_init_qdio_queues(struct qeth_card *card)
{
int i, j;
int rc;
QETH_DBF_TEXT(SETUP, 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 =