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linux-next/drivers/s390/net/qeth_core_sys.c
Stefan Raspl d66cb37e96 qeth: Add new priority queueing options 
The existing options for priority queueing within OSA devices were based on
the now partially defunct TOS field. This patch adds two new options as
follows:
   - prio_queueing_skb: bases priority queueing on skb-priority
   - prio_queueing_vlan: uses the priority code point in the 802.1Q header

Signed-off-by: Stefan Raspl <raspl@linux.vnet.ibm.com>
Signed-off-by: Frank Blaschka <frank.blaschka@de.ibm.com>
Reviewed-by: Ursula Braun <ursula.braun@de.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-04-28 13:44:10 -04:00

759 lines
19 KiB
C
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/*
* Copyright IBM Corp. 2007
* 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/list.h>
#include <linux/rwsem.h>
#include <asm/ebcdic.h>
#include "qeth_core.h"
static ssize_t qeth_dev_state_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct qeth_card *card = dev_get_drvdata(dev);
if (!card)
return -EINVAL;
switch (card->state) {
case CARD_STATE_DOWN:
return sprintf(buf, "DOWN\n");
case CARD_STATE_HARDSETUP:
return sprintf(buf, "HARDSETUP\n");
case CARD_STATE_SOFTSETUP:
return sprintf(buf, "SOFTSETUP\n");
case CARD_STATE_UP:
if (card->lan_online)
return sprintf(buf, "UP (LAN ONLINE)\n");
else
return sprintf(buf, "UP (LAN OFFLINE)\n");
case CARD_STATE_RECOVER:
return sprintf(buf, "RECOVER\n");
default:
return sprintf(buf, "UNKNOWN\n");
}
}
static DEVICE_ATTR(state, 0444, qeth_dev_state_show, NULL);
static ssize_t qeth_dev_chpid_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct qeth_card *card = dev_get_drvdata(dev);
if (!card)
return -EINVAL;
return sprintf(buf, "%02X\n", card->info.chpid);
}
static DEVICE_ATTR(chpid, 0444, qeth_dev_chpid_show, NULL);
static ssize_t qeth_dev_if_name_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct qeth_card *card = dev_get_drvdata(dev);
if (!card)
return -EINVAL;
return sprintf(buf, "%s\n", QETH_CARD_IFNAME(card));
}
static DEVICE_ATTR(if_name, 0444, qeth_dev_if_name_show, NULL);
static ssize_t qeth_dev_card_type_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct qeth_card *card = dev_get_drvdata(dev);
if (!card)
return -EINVAL;
return sprintf(buf, "%s\n", qeth_get_cardname_short(card));
}
static DEVICE_ATTR(card_type, 0444, qeth_dev_card_type_show, NULL);
static inline const char *qeth_get_bufsize_str(struct qeth_card *card)
{
if (card->qdio.in_buf_size == 16384)
return "16k";
else if (card->qdio.in_buf_size == 24576)
return "24k";
else if (card->qdio.in_buf_size == 32768)
return "32k";
else if (card->qdio.in_buf_size == 40960)
return "40k";
else
return "64k";
}
static ssize_t qeth_dev_inbuf_size_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct qeth_card *card = dev_get_drvdata(dev);
if (!card)
return -EINVAL;
return sprintf(buf, "%s\n", qeth_get_bufsize_str(card));
}
static DEVICE_ATTR(inbuf_size, 0444, qeth_dev_inbuf_size_show, NULL);
static ssize_t qeth_dev_portno_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct qeth_card *card = dev_get_drvdata(dev);
if (!card)
return -EINVAL;
return sprintf(buf, "%i\n", card->info.portno);
}
static ssize_t qeth_dev_portno_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count)
{
struct qeth_card *card = dev_get_drvdata(dev);
char *tmp;
unsigned int portno, limit;
int rc = 0;
if (!card)
return -EINVAL;
mutex_lock(&card->conf_mutex);
if ((card->state != CARD_STATE_DOWN) &&
(card->state != CARD_STATE_RECOVER)) {
rc = -EPERM;
goto out;
}
portno = simple_strtoul(buf, &tmp, 16);
if (portno > QETH_MAX_PORTNO) {
rc = -EINVAL;
goto out;
}
limit = (card->ssqd.pcnt ? card->ssqd.pcnt - 1 : card->ssqd.pcnt);
if (portno > limit) {
rc = -EINVAL;
goto out;
}
card->info.portno = portno;
out:
mutex_unlock(&card->conf_mutex);
return rc ? rc : count;
}
static DEVICE_ATTR(portno, 0644, qeth_dev_portno_show, qeth_dev_portno_store);
static ssize_t qeth_dev_portname_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct qeth_card *card = dev_get_drvdata(dev);
char portname[9] = {0, };
if (!card)
return -EINVAL;
if (card->info.portname_required) {
memcpy(portname, card->info.portname + 1, 8);
EBCASC(portname, 8);
return sprintf(buf, "%s\n", portname);
} else
return sprintf(buf, "no portname required\n");
}
static ssize_t qeth_dev_portname_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count)
{
struct qeth_card *card = dev_get_drvdata(dev);
char *tmp;
int i, rc = 0;
if (!card)
return -EINVAL;
mutex_lock(&card->conf_mutex);
if ((card->state != CARD_STATE_DOWN) &&
(card->state != CARD_STATE_RECOVER)) {
rc = -EPERM;
goto out;
}
tmp = strsep((char **) &buf, "\n");
if ((strlen(tmp) > 8) || (strlen(tmp) == 0)) {
rc = -EINVAL;
goto out;
}
card->info.portname[0] = strlen(tmp);
/* for beauty reasons */
for (i = 1; i < 9; i++)
card->info.portname[i] = ' ';
strcpy(card->info.portname + 1, tmp);
ASCEBC(card->info.portname + 1, 8);
out:
mutex_unlock(&card->conf_mutex);
return rc ? rc : count;
}
static DEVICE_ATTR(portname, 0644, qeth_dev_portname_show,
qeth_dev_portname_store);
static ssize_t qeth_dev_prioqing_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct qeth_card *card = dev_get_drvdata(dev);
if (!card)
return -EINVAL;
switch (card->qdio.do_prio_queueing) {
case QETH_PRIO_Q_ING_PREC:
return sprintf(buf, "%s\n", "by precedence");
case QETH_PRIO_Q_ING_TOS:
return sprintf(buf, "%s\n", "by type of service");
case QETH_PRIO_Q_ING_SKB:
return sprintf(buf, "%s\n", "by skb-priority");
case QETH_PRIO_Q_ING_VLAN:
return sprintf(buf, "%s\n", "by VLAN headers");
default:
return sprintf(buf, "always queue %i\n",
card->qdio.default_out_queue);
}
}
static ssize_t qeth_dev_prioqing_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count)
{
struct qeth_card *card = dev_get_drvdata(dev);
char *tmp;
int rc = 0;
if (!card)
return -EINVAL;
mutex_lock(&card->conf_mutex);
if ((card->state != CARD_STATE_DOWN) &&
(card->state != CARD_STATE_RECOVER)) {
rc = -EPERM;
goto out;
}
/* check if 1920 devices are supported ,
* if though we have to permit priority queueing
*/
if (card->qdio.no_out_queues == 1) {
card->qdio.do_prio_queueing = QETH_PRIOQ_DEFAULT;
rc = -EPERM;
goto out;
}
tmp = strsep((char **) &buf, "\n");
if (!strcmp(tmp, "prio_queueing_prec")) {
card->qdio.do_prio_queueing = QETH_PRIO_Q_ING_PREC;
card->qdio.default_out_queue = QETH_DEFAULT_QUEUE;
} else if (!strcmp(tmp, "prio_queueing_skb")) {
card->qdio.do_prio_queueing = QETH_PRIO_Q_ING_SKB;
card->qdio.default_out_queue = QETH_DEFAULT_QUEUE;
} else if (!strcmp(tmp, "prio_queueing_tos")) {
card->qdio.do_prio_queueing = QETH_PRIO_Q_ING_TOS;
card->qdio.default_out_queue = QETH_DEFAULT_QUEUE;
} else if (!strcmp(tmp, "prio_queueing_vlan")) {
if (!card->options.layer2) {
rc = -ENOTSUPP;
goto out;
}
card->qdio.do_prio_queueing = QETH_PRIO_Q_ING_VLAN;
card->qdio.default_out_queue = QETH_DEFAULT_QUEUE;
} else if (!strcmp(tmp, "no_prio_queueing:0")) {
card->qdio.do_prio_queueing = QETH_NO_PRIO_QUEUEING;
card->qdio.default_out_queue = 0;
} else if (!strcmp(tmp, "no_prio_queueing:1")) {
card->qdio.do_prio_queueing = QETH_NO_PRIO_QUEUEING;
card->qdio.default_out_queue = 1;
} else if (!strcmp(tmp, "no_prio_queueing:2")) {
card->qdio.do_prio_queueing = QETH_NO_PRIO_QUEUEING;
card->qdio.default_out_queue = 2;
} else if (!strcmp(tmp, "no_prio_queueing:3")) {
card->qdio.do_prio_queueing = QETH_NO_PRIO_QUEUEING;
card->qdio.default_out_queue = 3;
} else if (!strcmp(tmp, "no_prio_queueing")) {
card->qdio.do_prio_queueing = QETH_NO_PRIO_QUEUEING;
card->qdio.default_out_queue = QETH_DEFAULT_QUEUE;
} else
rc = -EINVAL;
out:
mutex_unlock(&card->conf_mutex);
return rc ? rc : count;
}
static DEVICE_ATTR(priority_queueing, 0644, qeth_dev_prioqing_show,
qeth_dev_prioqing_store);
static ssize_t qeth_dev_bufcnt_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct qeth_card *card = dev_get_drvdata(dev);
if (!card)
return -EINVAL;
return sprintf(buf, "%i\n", card->qdio.in_buf_pool.buf_count);
}
static ssize_t qeth_dev_bufcnt_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count)
{
struct qeth_card *card = dev_get_drvdata(dev);
char *tmp;
int cnt, old_cnt;
int rc = 0;
if (!card)
return -EINVAL;
mutex_lock(&card->conf_mutex);
if ((card->state != CARD_STATE_DOWN) &&
(card->state != CARD_STATE_RECOVER)) {
rc = -EPERM;
goto out;
}
old_cnt = card->qdio.in_buf_pool.buf_count;
cnt = simple_strtoul(buf, &tmp, 10);
cnt = (cnt < QETH_IN_BUF_COUNT_MIN) ? QETH_IN_BUF_COUNT_MIN :
((cnt > QETH_IN_BUF_COUNT_MAX) ? QETH_IN_BUF_COUNT_MAX : cnt);
if (old_cnt != cnt) {
rc = qeth_realloc_buffer_pool(card, cnt);
}
out:
mutex_unlock(&card->conf_mutex);
return rc ? rc : count;
}
static DEVICE_ATTR(buffer_count, 0644, qeth_dev_bufcnt_show,
qeth_dev_bufcnt_store);
static ssize_t qeth_dev_recover_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count)
{
struct qeth_card *card = dev_get_drvdata(dev);
char *tmp;
int i;
if (!card)
return -EINVAL;
if (card->state != CARD_STATE_UP)
return -EPERM;
i = simple_strtoul(buf, &tmp, 16);
if (i == 1)
qeth_schedule_recovery(card);
return count;
}
static DEVICE_ATTR(recover, 0200, NULL, qeth_dev_recover_store);
static ssize_t qeth_dev_performance_stats_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct qeth_card *card = dev_get_drvdata(dev);
if (!card)
return -EINVAL;
return sprintf(buf, "%i\n", card->options.performance_stats ? 1:0);
}
static ssize_t qeth_dev_performance_stats_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count)
{
struct qeth_card *card = dev_get_drvdata(dev);
char *tmp;
int i, rc = 0;
if (!card)
return -EINVAL;
mutex_lock(&card->conf_mutex);
i = simple_strtoul(buf, &tmp, 16);
if ((i == 0) || (i == 1)) {
if (i == card->options.performance_stats)
goto out;
card->options.performance_stats = i;
if (i == 0)
memset(&card->perf_stats, 0,
sizeof(struct qeth_perf_stats));
card->perf_stats.initial_rx_packets = card->stats.rx_packets;
card->perf_stats.initial_tx_packets = card->stats.tx_packets;
} else
rc = -EINVAL;
out:
mutex_unlock(&card->conf_mutex);
return rc ? rc : count;
}
static DEVICE_ATTR(performance_stats, 0644, qeth_dev_performance_stats_show,
qeth_dev_performance_stats_store);
static ssize_t qeth_dev_layer2_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct qeth_card *card = dev_get_drvdata(dev);
if (!card)
return -EINVAL;
return sprintf(buf, "%i\n", card->options.layer2);
}
static ssize_t qeth_dev_layer2_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count)
{
struct qeth_card *card = dev_get_drvdata(dev);
char *tmp;
int i, rc = 0;
enum qeth_discipline_id newdis;
if (!card)
return -EINVAL;
mutex_lock(&card->discipline_mutex);
if (card->state != CARD_STATE_DOWN) {
rc = -EPERM;
goto out;
}
i = simple_strtoul(buf, &tmp, 16);
switch (i) {
case 0:
newdis = QETH_DISCIPLINE_LAYER3;
break;
case 1:
newdis = QETH_DISCIPLINE_LAYER2;
break;
default:
rc = -EINVAL;
goto out;
}
if (card->options.layer2 == newdis)
goto out;
else {
card->info.mac_bits = 0;
if (card->discipline) {
card->discipline->remove(card->gdev);
qeth_core_free_discipline(card);
}
}
rc = qeth_core_load_discipline(card, newdis);
if (rc)
goto out;
rc = card->discipline->setup(card->gdev);
out:
mutex_unlock(&card->discipline_mutex);
return rc ? rc : count;
}
static DEVICE_ATTR(layer2, 0644, qeth_dev_layer2_show,
qeth_dev_layer2_store);
#define ATTR_QETH_ISOLATION_NONE ("none")
#define ATTR_QETH_ISOLATION_FWD ("forward")
#define ATTR_QETH_ISOLATION_DROP ("drop")
static ssize_t qeth_dev_isolation_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct qeth_card *card = dev_get_drvdata(dev);
if (!card)
return -EINVAL;
switch (card->options.isolation) {
case ISOLATION_MODE_NONE:
return snprintf(buf, 6, "%s\n", ATTR_QETH_ISOLATION_NONE);
case ISOLATION_MODE_FWD:
return snprintf(buf, 9, "%s\n", ATTR_QETH_ISOLATION_FWD);
case ISOLATION_MODE_DROP:
return snprintf(buf, 6, "%s\n", ATTR_QETH_ISOLATION_DROP);
default:
return snprintf(buf, 5, "%s\n", "N/A");
}
}
static ssize_t qeth_dev_isolation_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count)
{
struct qeth_card *card = dev_get_drvdata(dev);
enum qeth_ipa_isolation_modes isolation;
int rc = 0;
char *tmp, *curtoken;
curtoken = (char *) buf;
if (!card)
return -EINVAL;
mutex_lock(&card->conf_mutex);
/* check for unknown, too, in case we do not yet know who we are */
if (card->info.type != QETH_CARD_TYPE_OSD &&
card->info.type != QETH_CARD_TYPE_OSX &&
card->info.type != QETH_CARD_TYPE_UNKNOWN) {
rc = -EOPNOTSUPP;
dev_err(&card->gdev->dev, "Adapter does not "
"support QDIO data connection isolation\n");
goto out;
}
/* parse input into isolation mode */
tmp = strsep(&curtoken, "\n");
if (!strcmp(tmp, ATTR_QETH_ISOLATION_NONE)) {
isolation = ISOLATION_MODE_NONE;
} else if (!strcmp(tmp, ATTR_QETH_ISOLATION_FWD)) {
isolation = ISOLATION_MODE_FWD;
} else if (!strcmp(tmp, ATTR_QETH_ISOLATION_DROP)) {
isolation = ISOLATION_MODE_DROP;
} else {
rc = -EINVAL;
goto out;
}
rc = count;
/* defer IP assist if device is offline (until discipline->set_online)*/
card->options.prev_isolation = card->options.isolation;
card->options.isolation = isolation;
if (card->state == CARD_STATE_SOFTSETUP ||
card->state == CARD_STATE_UP) {
int ipa_rc = qeth_set_access_ctrl_online(card, 1);
if (ipa_rc != 0)
rc = ipa_rc;
}
out:
mutex_unlock(&card->conf_mutex);
return rc;
}
static DEVICE_ATTR(isolation, 0644, qeth_dev_isolation_show,
qeth_dev_isolation_store);
static ssize_t qeth_hw_trap_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct qeth_card *card = dev_get_drvdata(dev);
if (!card)
return -EINVAL;
if (card->info.hwtrap)
return snprintf(buf, 5, "arm\n");
else
return snprintf(buf, 8, "disarm\n");
}
static ssize_t qeth_hw_trap_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count)
{
struct qeth_card *card = dev_get_drvdata(dev);
int rc = 0;
char *tmp, *curtoken;
int state = 0;
curtoken = (char *)buf;
if (!card)
return -EINVAL;
mutex_lock(&card->conf_mutex);
if (card->state == CARD_STATE_SOFTSETUP || card->state == CARD_STATE_UP)
state = 1;
tmp = strsep(&curtoken, "\n");
if (!strcmp(tmp, "arm") && !card->info.hwtrap) {
if (state) {
if (qeth_is_diagass_supported(card,
QETH_DIAGS_CMD_TRAP)) {
rc = qeth_hw_trap(card, QETH_DIAGS_TRAP_ARM);
if (!rc)
card->info.hwtrap = 1;
} else
rc = -EINVAL;
} else
card->info.hwtrap = 1;
} else if (!strcmp(tmp, "disarm") && card->info.hwtrap) {
if (state) {
rc = qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
if (!rc)
card->info.hwtrap = 0;
} else
card->info.hwtrap = 0;
} else if (!strcmp(tmp, "trap") && state && card->info.hwtrap)
rc = qeth_hw_trap(card, QETH_DIAGS_TRAP_CAPTURE);
else
rc = -EINVAL;
mutex_unlock(&card->conf_mutex);
return rc ? rc : count;
}
static DEVICE_ATTR(hw_trap, 0644, qeth_hw_trap_show,
qeth_hw_trap_store);
static ssize_t qeth_dev_blkt_show(char *buf, struct qeth_card *card, int value)
{
if (!card)
return -EINVAL;
return sprintf(buf, "%i\n", value);
}
static ssize_t qeth_dev_blkt_store(struct qeth_card *card,
const char *buf, size_t count, int *value, int max_value)
{
char *tmp;
int i, rc = 0;
if (!card)
return -EINVAL;
mutex_lock(&card->conf_mutex);
if ((card->state != CARD_STATE_DOWN) &&
(card->state != CARD_STATE_RECOVER)) {
rc = -EPERM;
goto out;
}
i = simple_strtoul(buf, &tmp, 10);
if (i <= max_value)
*value = i;
else
rc = -EINVAL;
out:
mutex_unlock(&card->conf_mutex);
return rc ? rc : count;
}
static ssize_t qeth_dev_blkt_total_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct qeth_card *card = dev_get_drvdata(dev);
return qeth_dev_blkt_show(buf, card, card->info.blkt.time_total);
}
static ssize_t qeth_dev_blkt_total_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count)
{
struct qeth_card *card = dev_get_drvdata(dev);
return qeth_dev_blkt_store(card, buf, count,
&card->info.blkt.time_total, 5000);
}
static DEVICE_ATTR(total, 0644, qeth_dev_blkt_total_show,
qeth_dev_blkt_total_store);
static ssize_t qeth_dev_blkt_inter_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct qeth_card *card = dev_get_drvdata(dev);
return qeth_dev_blkt_show(buf, card, card->info.blkt.inter_packet);
}
static ssize_t qeth_dev_blkt_inter_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count)
{
struct qeth_card *card = dev_get_drvdata(dev);
return qeth_dev_blkt_store(card, buf, count,
&card->info.blkt.inter_packet, 1000);
}
static DEVICE_ATTR(inter, 0644, qeth_dev_blkt_inter_show,
qeth_dev_blkt_inter_store);
static ssize_t qeth_dev_blkt_inter_jumbo_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct qeth_card *card = dev_get_drvdata(dev);
return qeth_dev_blkt_show(buf, card,
card->info.blkt.inter_packet_jumbo);
}
static ssize_t qeth_dev_blkt_inter_jumbo_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count)
{
struct qeth_card *card = dev_get_drvdata(dev);
return qeth_dev_blkt_store(card, buf, count,
&card->info.blkt.inter_packet_jumbo, 1000);
}
static DEVICE_ATTR(inter_jumbo, 0644, qeth_dev_blkt_inter_jumbo_show,
qeth_dev_blkt_inter_jumbo_store);
static struct attribute *qeth_blkt_device_attrs[] = {
&dev_attr_total.attr,
&dev_attr_inter.attr,
&dev_attr_inter_jumbo.attr,
NULL,
};
static struct attribute_group qeth_device_blkt_group = {
.name = "blkt",
.attrs = qeth_blkt_device_attrs,
};
static struct attribute *qeth_device_attrs[] = {
&dev_attr_state.attr,
&dev_attr_chpid.attr,
&dev_attr_if_name.attr,
&dev_attr_card_type.attr,
&dev_attr_inbuf_size.attr,
&dev_attr_portno.attr,
&dev_attr_portname.attr,
&dev_attr_priority_queueing.attr,
&dev_attr_buffer_count.attr,
&dev_attr_recover.attr,
&dev_attr_performance_stats.attr,
&dev_attr_layer2.attr,
&dev_attr_isolation.attr,
&dev_attr_hw_trap.attr,
NULL,
};
static struct attribute_group qeth_device_attr_group = {
.attrs = qeth_device_attrs,
};
const struct attribute_group *qeth_generic_attr_groups[] = {
&qeth_device_attr_group,
&qeth_device_blkt_group,
NULL,
};
static struct attribute *qeth_osn_device_attrs[] = {
&dev_attr_state.attr,
&dev_attr_chpid.attr,
&dev_attr_if_name.attr,
&dev_attr_card_type.attr,
&dev_attr_buffer_count.attr,
&dev_attr_recover.attr,
NULL,
};
static struct attribute_group qeth_osn_device_attr_group = {
.attrs = qeth_osn_device_attrs,
};
const struct attribute_group *qeth_osn_attr_groups[] = {
&qeth_osn_device_attr_group,
NULL,
};
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