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Subject[patch 7/9] qeth: New read configuration data.
From: Cornelia Huck <cornelia.huck@de.ibm.com>

Instead of the deprecated read_conf_data(), implement a new function
qeth_read_conf_data().

Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
---
drivers/s390/net/qeth.h | 3 +
drivers/s390/net/qeth_main.c | 77 ++++++++++++++++++++++++++++++++++++++++---
drivers/s390/net/qeth_mpc.h | 1
3 files changed, 76 insertions(+), 5 deletions(-)
Index: quilt-2.6/drivers/s390/net/qeth.h
===================================================================
--- quilt-2.6.orig/drivers/s390/net/qeth.h 2007-05-04 18:48:36.000000000 +0200
+++ quilt-2.6/drivers/s390/net/qeth.h 2007-05-04 18:50:16.000000000 +0200
@@ -288,6 +288,7 @@
*/
#define IF_NAME_LEN 16
#define QETH_TX_TIMEOUT 100 * HZ
+#define QETH_RCD_TIMEOUT 60 * HZ
#define QETH_HEADER_SIZE 32
#define MAX_PORTNO 15
#define QETH_FAKE_LL_LEN_ETH ETH_HLEN
@@ -582,6 +583,8 @@
CH_STATE_ACTIVATING,
CH_STATE_HALTED,
CH_STATE_STOPPED,
+ CH_STATE_RCD,
+ CH_STATE_RCD_DONE,
};
/**
* card state machine
Index: quilt-2.6/drivers/s390/net/qeth_main.c
===================================================================
--- quilt-2.6.orig/drivers/s390/net/qeth_main.c 2007-05-04 18:48:36.000000000 +0200
+++ quilt-2.6/drivers/s390/net/qeth_main.c 2007-05-04 18:50:16.000000000 +0200
@@ -315,7 +315,8 @@
}

static long
-__qeth_check_irb_error(struct ccw_device *cdev, struct irb *irb)
+__qeth_check_irb_error(struct ccw_device *cdev, unsigned long intparm,
+ struct irb *irb)
{
if (!IS_ERR(irb))
return 0;
@@ -330,6 +331,14 @@
PRINT_WARN("timeout on device %s\n", cdev->dev.bus_id);
QETH_DBF_TEXT(trace, 2, "ckirberr");
QETH_DBF_TEXT_(trace, 2, " rc%d", -ETIMEDOUT);
+ if (intparm == QETH_RCD_PARM) {
+ struct qeth_card *card = CARD_FROM_CDEV(cdev);
+
+ if (card && (card->data.ccwdev == cdev)) {
+ card->data.state = CH_STATE_DOWN;
+ wake_up(&card->wait_q);
+ }
+ }
break;
default:
PRINT_WARN("unknown error %ld on device %s\n", PTR_ERR(irb),
@@ -401,7 +410,7 @@

QETH_DBF_TEXT(trace,5,"irq");

- if (__qeth_check_irb_error(cdev, irb))
+ if (__qeth_check_irb_error(cdev, intparm, irb))
return;
cstat = irb->scsw.cstat;
dstat = irb->scsw.dstat;
@@ -429,7 +438,8 @@
channel->state = CH_STATE_HALTED;

/*let's wake up immediately on data channel*/
- if ((channel == &card->data) && (intparm != 0))
+ if ((channel == &card->data) && (intparm != 0) &&
+ (intparm != QETH_RCD_PARM))
goto out;

if (intparm == QETH_CLEAR_CHANNEL_PARM) {
@@ -453,6 +463,10 @@
HEXDUMP16(WARN,"irb: ",irb);
HEXDUMP16(WARN,"sense data: ",irb->ecw);
}
+ if (intparm == QETH_RCD_PARM) {
+ channel->state = CH_STATE_DOWN;
+ goto out;
+ }
rc = qeth_get_problem(cdev,irb);
if (rc) {
qeth_schedule_recovery(card);
@@ -460,6 +474,10 @@
}
}

+ if (intparm == QETH_RCD_PARM) {
+ channel->state = CH_STATE_RCD_DONE;
+ goto out;
+ }
if (intparm) {
buffer = (struct qeth_cmd_buffer *) __va((addr_t)intparm);
buffer->state = BUF_STATE_PROCESSED;
@@ -1204,6 +1222,54 @@
}


+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;
+
+ channel->ccw.cmd_code = ciw->cmd;
+ channel->ccw.cda = (__u32) __pa (rcd_buf);
+ channel->ccw.count = ciw->count;
+ channel->ccw.flags = CCW_FLAG_SLI;
+ 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 int
qeth_get_unitaddr(struct qeth_card *card)
{
@@ -1212,9 +1278,9 @@
int rc;

QETH_DBF_TEXT(setup, 2, "getunit");
- rc = read_conf_data(CARD_DDEV(card), (void **) &prcd, &length);
+ rc = qeth_read_conf_data(card, (void **) &prcd, &length);
if (rc) {
- PRINT_ERR("read_conf_data for device %s returned %i\n",
+ PRINT_ERR("qeth_read_conf_data for device %s returned %i\n",
CARD_DDEV_ID(card), rc);
return rc;
}
@@ -1223,6 +1289,7 @@
card->info.cula = prcd[63];
card->info.guestlan = ((prcd[0x10] == _ascebc['V']) &&
(prcd[0x11] == _ascebc['M']));
+ kfree(prcd);
return 0;
}

Index: quilt-2.6/drivers/s390/net/qeth_mpc.h
===================================================================
--- quilt-2.6.orig/drivers/s390/net/qeth_mpc.h 2007-05-04 18:48:36.000000000 +0200
+++ quilt-2.6/drivers/s390/net/qeth_mpc.h 2007-05-04 18:50:16.000000000 +0200
@@ -37,6 +37,7 @@

#define QETH_CLEAR_CHANNEL_PARM -10
#define QETH_HALT_CHANNEL_PARM -11
+#define QETH_RCD_PARM -12

/*****************************************************************************/
/* IP Assist related definitions */
--
blue skies,
Martin.

"Reality continues to ruin my life." - Calvin.

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