[S390] service level interface.

Add a new proc interface /proc/service_levels that allows any code
to report a relevant service level, e.g. the microcode level of
devices, the service level of the hypervisor, etc.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

2 files changed, 13 insertions, 0 deletions

diff --git a/drivers/s390/net/qeth_core.h b/drivers/s390/net/qeth_core.h
index af6d60458513..1414d3df69dc 100644
--- a/drivers/s390/net/qeth_core.h
+++ b/drivers/s390/net/qeth_core.h
@@ -31,6 +31,7 @@
 #include <asm/qdio.h>
 #include <asm/ccwdev.h>
 #include <asm/ccwgroup.h>
+#include <asm/sysinfo.h>
 
 #include "qeth_core_mpc.h"
 
@@ -733,6 +734,7 @@ struct qeth_card {
         struct qeth_osn_info osn_info;
         struct qeth_discipline discipline;
         atomic_t force_alloc_skb;
+        struct service_level qeth_service_level;
 };
 
 struct qeth_card_list_struct {
diff --git a/drivers/s390/net/qeth_core_main.c b/drivers/s390/net/qeth_core_main.c
index ebdc549da537..3dc752c29c73 100644
--- a/drivers/s390/net/qeth_core_main.c
+++ b/drivers/s390/net/qeth_core_main.c
@@ -1138,6 +1138,14 @@ static int qeth_setup_card(struct qeth_card *card)
         return 0;
 }
 
+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);
+        seq_printf(m, "qeth: %s firmware level %s\n", CARD_BUS_ID(card),
+                        card->info.mcl_level);
+}
+
 static struct qeth_card *qeth_alloc_card(void)
 {
         struct qeth_card *card;
@@ -1157,6 +1165,8 @@ static struct qeth_card *qeth_alloc_card(void)
                 return NULL;
         }
         card->options.layer2 = -1;
+        card->qeth_service_level.seq_print = qeth_core_sl_print;
+        register_service_level(&card->qeth_service_level);
         return card;
 }
 
@@ -3730,6 +3740,7 @@ static void qeth_core_free_card(struct qeth_card *card)
                 free_netdev(card->dev);
         kfree(card->ip_tbd_list);
         qeth_free_qdio_buffers(card);
+        unregister_service_level(&card->qeth_service_level);
         kfree(card);
 }