s390/cio: Add new Operation Code OC3 to PNSO

Add support for operation code 3 (OC3) of the
Perform-Network-Subchannel-Operations (PNSO) function
of the Channel-Subsystem-Call (CHSC) instruction.

PNSO provides 2 operation codes:
OC0 - BRIDGE_INFO
OC3 - ADDR_INFO (new)

Extend the function calls to *pnso* to pass the OC and
add new response code 0108.

Support for OC3 is indicated by a flag in the css_general_characteristics.
Signed-off-by: Alexandra Winter <wintera@linux.ibm.com>
Reviewed-by: Julian Wiedmann <jwi@linux.ibm.com>
Reviewed-by: Peter Oberparleiter <oberpar@linux.ibm.com>
Reviewed-by: Vineeth Vijayan <vneethv@linux.ibm.com>
Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Acked-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

arch/s390/include/asm/ccwdev.h

@@ -238,7 +238,6 @@ extern void ccw_device_get_schid(struct ccw_device *, struct subchannel_id *);
 struct channel_path_desc_fmt0 *ccw_device_get_chp_desc(struct ccw_device *, int);
 u8 *ccw_device_get_util_str(struct ccw_device *cdev, int chp_idx);
 int ccw_device_pnso(struct ccw_device *cdev,
-		    struct chsc_pnso_area *pnso_area,
-		    struct chsc_pnso_resume_token resume_token,
-		    int cnc);
+		    struct chsc_pnso_area *pnso_area, u8 oc,
+		    struct chsc_pnso_resume_token resume_token, int cnc);
 #endif /* _S390_CCWDEV_H_ */

arch/s390/include/asm/chsc.h

@@ -11,6 +11,13 @@
 
 #include <uapi/asm/chsc.h>
 
+/**
+ * Operation codes for CHSC PNSO:
+ *    PNSO_OC_NET_BRIDGE_INFO - only addresses that are visible to a bridgeport
+ *    PNSO_OC_NET_ADDR_INFO   - all addresses
+ */
+#define PNSO_OC_NET_BRIDGE_INFO		0
+#define PNSO_OC_NET_ADDR_INFO		3
 /**
  * struct chsc_pnso_naid_l2 - network address information descriptor
  * @nit:  Network interface token

arch/s390/include/asm/css_chars.h

@@ -36,7 +36,9 @@ struct css_general_char {
 	u64 alt_ssi : 1; /* bit 108 */
 	u64 : 1;
 	u64 narf : 1;	 /* bit 110 */
-	u64 : 12;
+	u64 : 5;
+	u64 enarf: 1;	 /* bit 116 */
+	u64 : 6;
 	u64 util_str : 1;/* bit 123 */
 } __packed;
 

drivers/s390/cio/chsc.c

@@ -65,6 +65,8 @@ int chsc_error_from_response(int response)
 	case 0x0100:
 	case 0x0102:
 		return -ENOMEM;
+	case 0x0108:		/* "HW limit exceeded" for the op 0x003d */
+		return -EUSERS;
 	default:
 		return -EIO;
 	}
@@ -1340,6 +1342,7 @@ EXPORT_SYMBOL_GPL(chsc_scm_info);
  * chsc_pnso() - Perform Network-Subchannel Operation
  * @schid:		id of the subchannel on which PNSO is performed
  * @pnso_area:		request and response block for the operation
+ * @oc:			Operation Code
  * @resume_token:	resume token for multiblock response
  * @cnc:		Boolean change-notification control
  *
@@ -1347,10 +1350,8 @@ EXPORT_SYMBOL_GPL(chsc_scm_info);
  *
  * Returns 0 on success.
  */
-int chsc_pnso(struct subchannel_id schid,
-	      struct chsc_pnso_area *pnso_area,
-	      struct chsc_pnso_resume_token resume_token,
-	      int cnc)
+int chsc_pnso(struct subchannel_id schid, struct chsc_pnso_area *pnso_area,
+	      u8 oc, struct chsc_pnso_resume_token resume_token, int cnc)
 {
 	memset(pnso_area, 0, sizeof(*pnso_area));
 	pnso_area->request.length = 0x0030;
@@ -1359,7 +1360,7 @@ int chsc_pnso(struct subchannel_id schid,
 	pnso_area->ssid  = schid.ssid;
 	pnso_area->sch	 = schid.sch_no;
 	pnso_area->cssid = schid.cssid;
-	pnso_area->oc	 = 0; /* Store-network-bridging-information list */
+	pnso_area->oc	 = oc;
 	pnso_area->resume_token = resume_token;
 	pnso_area->n	   = (cnc != 0);
 	if (chsc(pnso_area))

drivers/s390/cio/chsc.h

@@ -205,10 +205,8 @@ struct chsc_scm_info {
 
 int chsc_scm_info(struct chsc_scm_info *scm_area, u64 token);
 
-int chsc_pnso(struct subchannel_id schid,
-	      struct chsc_pnso_area *pnso_area,
-	      struct chsc_pnso_resume_token resume_token,
-	      int cnc);
+int chsc_pnso(struct subchannel_id schid, struct chsc_pnso_area *pnso_area,
+	      u8 oc, struct chsc_pnso_resume_token resume_token, int cnc);
 
 int __init chsc_get_cssid(int idx);
 

drivers/s390/cio/device_ops.c

@@ -714,6 +714,7 @@ EXPORT_SYMBOL_GPL(ccw_device_get_schid);
  * ccw_device_pnso() - Perform Network-Subchannel Operation
  * @cdev:		device on which PNSO is performed
  * @pnso_area:		request and response block for the operation
+ * @oc:			Operation Code
  * @resume_token:	resume token for multiblock response
  * @cnc:		Boolean change-notification control
  *
@@ -722,14 +723,13 @@ EXPORT_SYMBOL_GPL(ccw_device_get_schid);
  * Returns 0 on success.
  */
 int ccw_device_pnso(struct ccw_device *cdev,
-		    struct chsc_pnso_area *pnso_area,
-		    struct chsc_pnso_resume_token resume_token,
-		    int cnc)
+		    struct chsc_pnso_area *pnso_area, u8 oc,
+		    struct chsc_pnso_resume_token resume_token, int cnc)
 {
 	struct subchannel_id schid;
 
 	ccw_device_get_schid(cdev, &schid);
-	return chsc_pnso(schid, pnso_area, resume_token, cnc);
+	return chsc_pnso(schid, pnso_area, oc, resume_token, cnc);
 }
 EXPORT_SYMBOL_GPL(ccw_device_pnso);
 

drivers/s390/net/qeth_l2_main.c

@@ -642,6 +642,7 @@ static void qeth_l2_set_rx_mode(struct net_device *dev)
 /**
  *	qeth_l2_pnso() - perform network subchannel operation
  *	@card: qeth_card structure pointer
+ *	@oc: Operation Code
  *	@cnc: Boolean Change-Notification Control
  *	@cb: Callback function will be executed for each element
  *		of the address list
@@ -652,7 +653,7 @@ static void qeth_l2_set_rx_mode(struct net_device *dev)
  *	control" is set, further changes in the address list will be reported
  *	via the IPA command.
  */
-static int qeth_l2_pnso(struct qeth_card *card, int cnc,
+static int qeth_l2_pnso(struct qeth_card *card, u8 oc, int cnc,
 			void (*cb)(void *priv, struct chsc_pnso_naid_l2 *entry),
 			void *priv)
 {
@@ -663,13 +664,14 @@ static int qeth_l2_pnso(struct qeth_card *card, int cnc,
 	int i, size, elems;
 	int rc;
 
-	QETH_CARD_TEXT(card, 2, "PNSO");
 	rr = (struct chsc_pnso_area *)get_zeroed_page(GFP_KERNEL);
 	if (rr == NULL)
 		return -ENOMEM;
 	do {
+		QETH_CARD_TEXT(card, 2, "PNSO");
 		/* on the first iteration, naihdr.resume_token will be zero */
-		rc = ccw_device_pnso(ddev, rr, rr->naihdr.resume_token, cnc);
+		rc = ccw_device_pnso(ddev, rr, oc, rr->naihdr.resume_token,
+				     cnc);
 		if (rc)
 			continue;
 		if (cb == NULL)
@@ -1578,11 +1580,12 @@ int qeth_bridgeport_an_set(struct qeth_card *card, int enable)
 	if (enable) {
 		qeth_bridge_emit_host_event(card, anev_reset, 0, NULL, NULL);
 		qeth_l2_set_pnso_mode(card, QETH_PNSO_BRIDGEPORT);
-		rc = qeth_l2_pnso(card, 1, qeth_bridgeport_an_set_cb, card);
+		rc = qeth_l2_pnso(card, PNSO_OC_NET_BRIDGE_INFO, 1,
+				  qeth_bridgeport_an_set_cb, card);
 		if (rc)
 			qeth_l2_set_pnso_mode(card, QETH_PNSO_NONE);
 	} else {
-		rc = qeth_l2_pnso(card, 0, NULL, NULL);
+		rc = qeth_l2_pnso(card, PNSO_OC_NET_BRIDGE_INFO, 0, NULL, NULL);
 		qeth_l2_set_pnso_mode(card, QETH_PNSO_NONE);
 	}
 	return rc;