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authorUrsula Braun <ursula.braun@de.ibm.com>2011-02-02 06:04:34 +0000
committerDavid S. Miller <davem@davemloft.net>2011-02-02 15:00:01 -0800
commitd0ff1f52361d714863c49abb721a8714ea4e76d6 (patch)
treea7fe4ddcb49a0b38d0cbf713664df5f4c19d73cd /drivers/s390/net
parent8b2e18f662939fb3d9b0ffe5da953ba56d259e3a (diff)
downloadlinux-linaro-android-d0ff1f52361d714863c49abb721a8714ea4e76d6.tar.gz
qeth: allow OSA CHPARM change in suspend state
For OSA the CHPARM-definition determines the number of available outbound queues. A CHPARM-change may occur while a Linux system with probed OSA device is in suspend state. This patch enables proper resuming of an OSA device in this case. Signed-off-by: Ursula braun <ursula.braun@de.ibm.com> Signed-off-by: Frank Blaschka <frank.blaschka@de.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/s390/net')
-rw-r--r--drivers/s390/net/qeth_core_main.c104
1 files changed, 63 insertions, 41 deletions
diff --git a/drivers/s390/net/qeth_core_main.c b/drivers/s390/net/qeth_core_main.c
index eca3e094031..019ae58ab91 100644
--- a/drivers/s390/net/qeth_core_main.c
+++ b/drivers/s390/net/qeth_core_main.c
@@ -988,16 +988,30 @@ static void qeth_get_channel_path_desc(struct qeth_card *card)
chp_dsc = (struct channelPath_dsc *)ccw_device_get_chp_desc(ccwdev, 0);
if (chp_dsc != NULL) {
/* CHPP field bit 6 == 1 -> single queue */
- if ((chp_dsc->chpp & 0x02) == 0x02)
+ if ((chp_dsc->chpp & 0x02) == 0x02) {
+ if ((atomic_read(&card->qdio.state) !=
+ QETH_QDIO_UNINITIALIZED) &&
+ (card->qdio.no_out_queues == 4))
+ /* change from 4 to 1 outbound queues */
+ 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;
+ } else {
+ if ((atomic_read(&card->qdio.state) !=
+ QETH_QDIO_UNINITIALIZED) &&
+ (card->qdio.no_out_queues == 1)) {
+ /* change from 1 to 4 outbound queues */
+ qeth_free_qdio_buffers(card);
+ card->qdio.default_out_queue = 2;
+ }
+ card->qdio.no_out_queues = 4;
+ }
card->info.func_level = 0x4100 + chp_dsc->desc;
kfree(chp_dsc);
}
- if (card->qdio.no_out_queues == 1) {
- card->qdio.default_out_queue = 0;
- dev_info(&card->gdev->dev,
- "Priority Queueing not supported\n");
- }
QETH_DBF_TEXT_(SETUP, 2, "nr:%x", card->qdio.no_out_queues);
QETH_DBF_TEXT_(SETUP, 2, "lvl:%02x", card->info.func_level);
return;
@@ -3756,6 +3770,47 @@ static inline int qeth_get_qdio_q_format(struct qeth_card *card)
}
}
+static void qeth_determine_capabilities(struct qeth_card *card)
+{
+ int rc;
+ int length;
+ char *prcd;
+ struct ccw_device *ddev;
+ int ddev_offline = 0;
+
+ QETH_DBF_TEXT(SETUP, 2, "detcapab");
+ ddev = CARD_DDEV(card);
+ if (!ddev->online) {
+ ddev_offline = 1;
+ rc = ccw_device_set_online(ddev);
+ if (rc) {
+ QETH_DBF_TEXT_(SETUP, 2, "3err%d", rc);
+ goto out;
+ }
+ }
+
+ rc = qeth_read_conf_data(card, (void **) &prcd, &length);
+ if (rc) {
+ QETH_DBF_MESSAGE(2, "%s qeth_read_conf_data returned %i\n",
+ dev_name(&card->gdev->dev), rc);
+ QETH_DBF_TEXT_(SETUP, 2, "5err%d", rc);
+ goto out_offline;
+ }
+ qeth_configure_unitaddr(card, prcd);
+ qeth_configure_blkt_default(card, prcd);
+ kfree(prcd);
+
+ rc = qdio_get_ssqd_desc(ddev, &card->ssqd);
+ if (rc)
+ QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);
+
+out_offline:
+ if (ddev_offline == 1)
+ ccw_device_set_offline(ddev);
+out:
+ return;
+}
+
static int qeth_qdio_establish(struct qeth_card *card)
{
struct qdio_initialize init_data;
@@ -3886,6 +3941,7 @@ int qeth_core_hardsetup_card(struct qeth_card *card)
QETH_DBF_TEXT(SETUP, 2, "hrdsetup");
atomic_set(&card->force_alloc_skb, 0);
+ qeth_get_channel_path_desc(card);
retry:
if (retries)
QETH_DBF_MESSAGE(2, "%s Retrying to do IDX activates.\n",
@@ -3914,6 +3970,7 @@ retriable:
else
goto retry;
}
+ qeth_determine_capabilities(card);
qeth_init_tokens(card);
qeth_init_func_level(card);
rc = qeth_idx_activate_channel(&card->read, qeth_idx_read_cb);
@@ -4183,41 +4240,6 @@ void qeth_core_free_discipline(struct qeth_card *card)
card->discipline.ccwgdriver = NULL;
}
-static void qeth_determine_capabilities(struct qeth_card *card)
-{
- int rc;
- int length;
- char *prcd;
-
- QETH_DBF_TEXT(SETUP, 2, "detcapab");
- rc = ccw_device_set_online(CARD_DDEV(card));
- if (rc) {
- QETH_DBF_TEXT_(SETUP, 2, "3err%d", rc);
- goto out;
- }
-
-
- rc = qeth_read_conf_data(card, (void **) &prcd, &length);
- if (rc) {
- QETH_DBF_MESSAGE(2, "%s qeth_read_conf_data returned %i\n",
- dev_name(&card->gdev->dev), rc);
- QETH_DBF_TEXT_(SETUP, 2, "5err%d", rc);
- goto out_offline;
- }
- qeth_configure_unitaddr(card, prcd);
- qeth_configure_blkt_default(card, prcd);
- kfree(prcd);
-
- rc = qdio_get_ssqd_desc(CARD_DDEV(card), &card->ssqd);
- if (rc)
- QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);
-
-out_offline:
- ccw_device_set_offline(CARD_DDEV(card));
-out:
- return;
-}
-
static int qeth_core_probe_device(struct ccwgroup_device *gdev)
{
struct qeth_card *card;