[S390] qeth: New read configuration data.

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>

3 files changed, 76 insertions, 5 deletions

diff --git a/drivers/s390/net/qeth.h b/drivers/s390/net/qeth.h
index 84b108d7c7fd..b34eb82edd98 100644
--- a/drivers/s390/net/qeth.h
+++ b/drivers/s390/net/qeth.h
@@ -288,6 +288,7 @@ qeth_is_ipa_enabled(struct qeth_ipa_info *ipa, enum qeth_ipa_funcs func)
  */
 #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 @@ enum qeth_channel_states {
         CH_STATE_ACTIVATING,
         CH_STATE_HALTED,
         CH_STATE_STOPPED,
+        CH_STATE_RCD,
+        CH_STATE_RCD_DONE,
 };
 /**
  * card state machine
diff --git a/drivers/s390/net/qeth_main.c b/drivers/s390/net/qeth_main.c
index ad7792dc1a04..6fd8870551d3 100644
--- a/drivers/s390/net/qeth_main.c
+++ b/drivers/s390/net/qeth_main.c
@@ -315,7 +315,8 @@ qeth_alloc_card(void)
 }
 
 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 @@ __qeth_check_irb_error(struct ccw_device *cdev, struct irb *irb)
                 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_irq(struct ccw_device *cdev, unsigned long intparm, struct irb *irb)
 
         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 @@ qeth_irq(struct ccw_device *cdev, unsigned long intparm, struct irb *irb)
                 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 @@ qeth_irq(struct ccw_device *cdev, unsigned long intparm, struct irb *irb)
                         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 @@ qeth_irq(struct ccw_device *cdev, unsigned long intparm, struct irb *irb)
                 }
         }
 
+        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 @@ qeth_probe_device(struct ccwgroup_device *gdev)
 }
 
 
+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 @@ qeth_get_unitaddr(struct qeth_card *card)
         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 @@ qeth_get_unitaddr(struct qeth_card *card)
         card->info.cula = prcd[63];
         card->info.guestlan = ((prcd[0x10] == _ascebc['V']) &&
                                (prcd[0x11] == _ascebc['M']));
+        kfree(prcd);
         return 0;
 }
 
diff --git a/drivers/s390/net/qeth_mpc.h b/drivers/s390/net/qeth_mpc.h
index 0477c47471c5..d74bc43da72a 100644
--- a/drivers/s390/net/qeth_mpc.h
+++ b/drivers/s390/net/qeth_mpc.h
@@ -37,6 +37,7 @@ extern unsigned char IPA_PDU_HEADER[];
 
 #define QETH_CLEAR_CHANNEL_PARM -10
 #define QETH_HALT_CHANNEL_PARM  -11
+#define QETH_RCD_PARM -12
 
 /*****************************************************************************/
 /* IP Assist related definitions                                             */