qeth: Display adjacent switch attributes

Add support to display the adjacent switch port's forwarding
attributes. Currently supports info on forwarding modes '802.1'
and 'rr' (reflective relay).

Signed-off-by: Stefan Raspl <raspl@linux.vnet.ibm.com>
Signed-off-by: Frank Blaschka <blaschka@linux.vnet.ibm.com>
Reviewed-by: Ursula Braun <ursula.braun@de.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

4 files changed, 100 insertions, 1 deletions

diff --git a/drivers/s390/net/qeth_core.h b/drivers/s390/net/qeth_core.h
index a2088af51cc5..bbafbd0e017a 100644
--- a/drivers/s390/net/qeth_core.h
+++ b/drivers/s390/net/qeth_core.h
@@ -766,6 +766,11 @@ struct carrier_info {
         __u32 port_speed;
 };
 
+struct qeth_switch_info {
+        __u32 capabilities;
+        __u32 settings;
+};
+
 #define QETH_NAPI_WEIGHT NAPI_POLL_WEIGHT
 
 struct qeth_card {
@@ -946,6 +951,8 @@ struct qeth_cmd_buffer *qeth_wait_for_buffer(struct qeth_channel *);
 int qeth_mdio_read(struct net_device *, int, int);
 int qeth_snmp_command(struct qeth_card *, char __user *);
 int qeth_query_oat_command(struct qeth_card *, char __user *);
+int qeth_query_switch_attributes(struct qeth_card *card,
+                                  struct qeth_switch_info *sw_info);
 int qeth_query_card_info(struct qeth_card *card,
         struct carrier_info *carrier_info);
 int qeth_send_control_data(struct qeth_card *, int, struct qeth_cmd_buffer *,
diff --git a/drivers/s390/net/qeth_core_main.c b/drivers/s390/net/qeth_core_main.c
index f54bec54d677..71bfacfc097e 100644
--- a/drivers/s390/net/qeth_core_main.c
+++ b/drivers/s390/net/qeth_core_main.c
@@ -3037,6 +3037,45 @@ int qeth_query_ipassists(struct qeth_card *card, enum qeth_prot_versions prot)
 }
 EXPORT_SYMBOL_GPL(qeth_query_ipassists);
 
+static int qeth_query_switch_attributes_cb(struct qeth_card *card,
+                                struct qeth_reply *reply, unsigned long data)
+{
+        struct qeth_ipa_cmd *cmd;
+        struct qeth_switch_info *sw_info;
+        struct qeth_query_switch_attributes *attrs;
+
+        QETH_CARD_TEXT(card, 2, "qswiatcb");
+        cmd = (struct qeth_ipa_cmd *) data;
+        sw_info = (struct qeth_switch_info *)reply->param;
+        if (cmd->data.setadapterparms.hdr.return_code == 0) {
+                attrs = &cmd->data.setadapterparms.data.query_switch_attributes;
+                sw_info->capabilities = attrs->capabilities;
+                sw_info->settings = attrs->settings;
+                QETH_CARD_TEXT_(card, 2, "%04x%04x", sw_info->capabilities,
+                                                        sw_info->settings);
+        }
+        qeth_default_setadapterparms_cb(card, reply, (unsigned long) cmd);
+
+        return 0;
+}
+
+int qeth_query_switch_attributes(struct qeth_card *card,
+                                 struct qeth_switch_info *sw_info)
+{
+        struct qeth_cmd_buffer *iob;
+
+        QETH_CARD_TEXT(card, 2, "qswiattr");
+        if (!qeth_adp_supported(card, IPA_SETADP_QUERY_SWITCH_ATTRIBUTES))
+                return -EOPNOTSUPP;
+        if (!netif_carrier_ok(card->dev))
+                return -ENOMEDIUM;
+        iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_SWITCH_ATTRIBUTES,
+                                sizeof(struct qeth_ipacmd_setadpparms_hdr));
+        return qeth_send_ipa_cmd(card, iob,
+                                qeth_query_switch_attributes_cb, sw_info);
+}
+EXPORT_SYMBOL_GPL(qeth_query_switch_attributes);
+
 static int qeth_query_setdiagass_cb(struct qeth_card *card,
                 struct qeth_reply *reply, unsigned long data)
 {
diff --git a/drivers/s390/net/qeth_core_mpc.h b/drivers/s390/net/qeth_core_mpc.h
index cf6a90ed42ae..1558be1af72d 100644
--- a/drivers/s390/net/qeth_core_mpc.h
+++ b/drivers/s390/net/qeth_core_mpc.h
@@ -242,6 +242,7 @@ enum qeth_ipa_setadp_cmd {
         IPA_SETADP_SET_DIAG_ASSIST              = 0x00002000L,
         IPA_SETADP_SET_ACCESS_CONTROL           = 0x00010000L,
         IPA_SETADP_QUERY_OAT                    = 0x00080000L,
+        IPA_SETADP_QUERY_SWITCH_ATTRIBUTES      = 0x00100000L,
 };
 enum qeth_ipa_mac_ops {
         CHANGE_ADDR_READ_MAC            = 0,
@@ -431,6 +432,21 @@ struct qeth_query_card_info {
         __u32   reserved2;
 };
 
+#define QETH_SWITCH_FORW_802_1          0x00000001
+#define QETH_SWITCH_FORW_REFL_RELAY     0x00000002
+#define QETH_SWITCH_CAP_RTE             0x00000004
+#define QETH_SWITCH_CAP_ECP             0x00000008
+#define QETH_SWITCH_CAP_VDP             0x00000010
+
+struct qeth_query_switch_attributes {
+        __u8  version;
+        __u8  reserved1;
+        __u16 reserved2;
+        __u32 capabilities;
+        __u32 settings;
+        __u8  reserved3[8];
+};
+
 struct qeth_ipacmd_setadpparms_hdr {
         __u32 supp_hw_cmds;
         __u32 reserved1;
@@ -452,6 +468,7 @@ struct qeth_ipacmd_setadpparms {
                 struct qeth_set_access_ctrl set_access_ctrl;
                 struct qeth_query_oat query_oat;
                 struct qeth_query_card_info card_info;
+                struct qeth_query_switch_attributes query_switch_attributes;
                 __u32 mode;
         } data;
 } __attribute__ ((packed));
diff --git a/drivers/s390/net/qeth_core_sys.c b/drivers/s390/net/qeth_core_sys.c
index 8a25a2be9890..15523f0e4c03 100644
--- a/drivers/s390/net/qeth_core_sys.c
+++ b/drivers/s390/net/qeth_core_sys.c
@@ -543,7 +543,42 @@ out:
 }
 
 static DEVICE_ATTR(isolation, 0644, qeth_dev_isolation_show,
-                   qeth_dev_isolation_store);
+                        qeth_dev_isolation_store);
+
+static ssize_t qeth_dev_switch_attrs_show(struct device *dev,
+                                struct device_attribute *attr, char *buf)
+{
+        struct qeth_card *card = dev_get_drvdata(dev);
+        struct qeth_switch_info sw_info;
+        int     rc = 0;
+
+        if (!card)
+                return -EINVAL;
+
+        if (card->state != CARD_STATE_SOFTSETUP && card->state != CARD_STATE_UP)
+                return sprintf(buf, "n/a\n");
+
+        rc = qeth_query_switch_attributes(card, &sw_info);
+        if (rc)
+                return rc;
+
+        if (!sw_info.capabilities)
+                rc = sprintf(buf, "unknown");
+
+        if (sw_info.capabilities & QETH_SWITCH_FORW_802_1)
+                rc = sprintf(buf, (sw_info.settings & QETH_SWITCH_FORW_802_1 ?
+                                                        "[802.1]" : "802.1"));
+        if (sw_info.capabilities & QETH_SWITCH_FORW_REFL_RELAY)
+                rc += sprintf(buf + rc,
+                        (sw_info.settings & QETH_SWITCH_FORW_REFL_RELAY ?
+                                                        " [rr]" : " rr"));
+        rc += sprintf(buf + rc, "\n");
+
+        return rc;
+}
+
+static DEVICE_ATTR(switch_attrs, 0444,
+                   qeth_dev_switch_attrs_show, NULL);
 
 static ssize_t qeth_hw_trap_show(struct device *dev,
                                 struct device_attribute *attr, char *buf)
@@ -728,6 +763,7 @@ static struct attribute *qeth_device_attrs[] = {
         &dev_attr_layer2.attr,
         &dev_attr_isolation.attr,
         &dev_attr_hw_trap.attr,
+        &dev_attr_switch_attrs.attr,
         NULL,
 };
 static struct attribute_group qeth_device_attr_group = {