[PATCH] s390: network driver

From: Martin Schwidefsky <schwidefsky@de.ibm.com>

Network driver changes:
 - iucv: Make grab_param function SMP safe.
 - lcs: Fix null-pointer dereference after unsuccessful set_online.
 - qeth: Fix kmalloc flags in qeth_alloc_reply.
 - qeth: Show broadcase capability also in route4/6 sysfs attributes.
 - qeth: Remove debug code.
 - qeth: Add option to qetharp user space interface to strip unused
         fields from query arp records.
 - qeth: Add shortcut in outbound path for HiperSockets.
 - qeth: Add more info to qeth_perf_stats.
 - qeth: Add support for direct SNMP interface to OSA express cards.

drivers/s390/net/iucv.c

 /* 
- * $Id: iucv.c,v 1.30 2004/05/13 09:21:23 braunu Exp $
+ * $Id: iucv.c,v 1.32 2004/05/18 09:28:43 braunu Exp $
  *
  * IUCV network driver
  *
@@ -29,7 +29,7 @@
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  *
- * RELEASE-TAG: IUCV lowlevel driver $Revision: 1.30 $
+ * RELEASE-TAG: IUCV lowlevel driver $Revision: 1.32 $
  *
  */
 
@@ -285,6 +285,7 @@ typedef struct {
 		iparml_set_mask p_set_mask;
 	} param;
 	atomic_t in_use;
+	__u32    res;
 }  __attribute__ ((aligned(8))) iucv_param;
 #define PARAM_POOL_SIZE (PAGE_SIZE / sizeof(iucv_param))
 
@@ -351,7 +352,7 @@ do { \
 static void
 iucv_banner(void)
 {
-	char vbuf[] = "$Revision: 1.30 $";
+	char vbuf[] = "$Revision: 1.32 $";
 	char *version = vbuf;
 
 	if ((version = strchr(version, ':'))) {
@@ -469,17 +470,19 @@ iucv_exit(void)
 static __inline__ iucv_param *
 grab_param(void)
 {
-	iucv_param *ret;
-	static int i = 0;
-
-	while (atomic_compare_and_swap(0, 1, &iucv_param_pool[i].in_use)) {
-		i++;
-		if (i >= PARAM_POOL_SIZE)
-			i = 0;
-	}
-	ret = &iucv_param_pool[i];
-	memset(&ret->param, 0, sizeof(ret->param));
-	return ret;
+	iucv_param *ptr;
+        static int hint = 0;
+
+	ptr = iucv_param_pool + hint;
+	do {
+		ptr++;
+		if (ptr >= iucv_param_pool + PARAM_POOL_SIZE)
+			ptr = iucv_param_pool;
+	} while (atomic_compare_and_swap(0, 1, &ptr->in_use));
+	hint = ptr - iucv_param_pool;
+
+	memset(&ptr->param, 0, sizeof(ptr->param));
+	return ptr;
 }
 
 /**

drivers/s390/net/lcs.c

@@ -11,7 +11,7 @@
  *			  Frank Pavlic (pavlic@de.ibm.com) and
  *		 	  Martin Schwidefsky <schwidefsky@de.ibm.com>
  *
- *    $Revision: 1.80 $	 $Date: 2004/05/13 08:22:06 $
+ *    $Revision: 1.81 $	 $Date: 2004/05/14 13:54:33 $
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -58,7 +58,7 @@
 /**
  * initialization string for output
  */
-#define VERSION_LCS_C  "$Revision: 1.80 $"
+#define VERSION_LCS_C  "$Revision: 1.81 $"
 
 static char version[] __initdata = "LCS driver ("VERSION_LCS_C "/" VERSION_LCS_H ")";
 static char debug_buffer[255];
@@ -1898,8 +1898,10 @@ lcs_new_device(struct ccwgroup_device *ccwgdev)
 	lcs_setup_card(card);
 	rc = lcs_detect(card);
 	if (rc) {
+		LCS_DBF_TEXT(2, setup, "dtctfail");
+		PRINT_WARN("Detection of LCS card failed with return code "
+			   "%d (0x%x)\n", rc, rc);
 		lcs_stopcard(card);
-		lcs_cleanup_card(card);
 		goto out;
 	}
 	if (card->dev) {
@@ -1962,7 +1964,6 @@ lcs_new_device(struct ccwgroup_device *ccwgdev)
 
 	ccw_device_set_offline(card->read.ccwdev);
 	ccw_device_set_offline(card->write.ccwdev);
-	lcs_cleanup_card(card);
 	return -ENODEV;
 }
 

drivers/s390/net/qeth.h

@@ -23,7 +23,7 @@
 
 #include "qeth_mpc.h"
 
-#define VERSION_QETH_H 		"$Revision: 1.107 $"
+#define VERSION_QETH_H 		"$Revision: 1.108 $"
 
 #ifdef CONFIG_QETH_IPV6
 #define QETH_VERSION_IPV6 	":IPv6"
@@ -179,15 +179,26 @@ struct qeth_perf_stats {
 
 	unsigned int sc_dp_p;
 	unsigned int sc_p_dp;
-
+	/* qdio_input_handler: number of times called, time spent in */
 	__u64 inbound_start_time;
 	unsigned int inbound_cnt;
 	unsigned int inbound_time;
+	/* qeth_send_packet: number of times called, time spent in */
 	__u64 outbound_start_time;
 	unsigned int outbound_cnt;
 	unsigned int outbound_time;
-	unsigned int inbound_do_qdio;
-	unsigned int outbound_do_qdio;
+	/* qdio_output_handler: number of times called, time spent in */
+	__u64 outbound_handler_start_time;
+	unsigned int outbound_handler_cnt;
+	unsigned int outbound_handler_time;
+	/* number of calls to and time spent in do_QDIO for inbound queue */
+	__u64 inbound_do_qdio_start_time;
+	unsigned int inbound_do_qdio_cnt;
+	unsigned int inbound_do_qdio_time;
+	/* number of calls to and time spent in do_QDIO for outbound queues */
+	__u64 outbound_do_qdio_start_time;
+	unsigned int outbound_do_qdio_cnt;
+	unsigned int outbound_do_qdio_time;
 };
 #endif /* CONFIG_QETH_PERF_STATS */
 
@@ -714,6 +725,15 @@ struct qeth_card_list_struct {
 
 extern struct qeth_card_list_struct qeth_card_list;
 
+/*notifier list */
+struct qeth_notify_list_struct {
+	struct list_head list;
+	struct task_struct *task;
+	int signum;
+};
+extern spinlock_t qeth_notify_lock;
+extern struct list_head qeth_notify_list;
+
 /*some helper functions*/
 
 inline static __u8
@@ -997,6 +1017,12 @@ qeth_add_rxip(struct qeth_card *, enum qeth_prot_versions, const u8 *);
 extern void
 qeth_del_rxip(struct qeth_card *, enum qeth_prot_versions, const u8 *);
 
+extern int
+qeth_notifier_register(struct task_struct *, int );
+
+extern int
+qeth_notifier_unregister(struct task_struct * );
+
 extern void
 qeth_schedule_recovery(struct qeth_card *);
 

drivers/s390/net/qeth_mpc.h

@@ -14,7 +14,7 @@
 
 #include <asm/qeth.h>
 
-#define VERSION_QETH_MPC_H "$Revision: 1.34 $"
+#define VERSION_QETH_MPC_H "$Revision: 1.35 $"
 
 extern const char *VERSION_QETH_MPC_C;
 
@@ -258,6 +258,7 @@ struct qeth_arp_query_data {
 /* used as parameter for arp_query reply */
 struct qeth_arp_query_info {
 	__u32 udata_len;
+	__u16 mask_bits;
 	__u32 udata_offset;
 	__u32 no_entries;
 	char *udata;
@@ -296,6 +297,29 @@ struct qeth_change_addr {
 	__u8 addr[OSA_ADDR_LEN];
 } __attribute__ ((packed));
 
+
+struct qeth_snmp_cmd {
+	__u8  token[16];
+	__u32 request;
+	__u32 interface;
+	__u32 returncode;
+	__u32 firmwarelevel;
+	__u32 seqno;
+	__u8  data;
+} __attribute__ ((packed));
+
+struct qeth_snmp_ureq_hdr {
+	__u32   data_len;
+	__u32   req_len;
+	__u32   reserved1;
+	__u32   reserved2;
+} __attribute__ ((packed));
+
+struct qeth_snmp_ureq {
+	struct qeth_snmp_ureq_hdr hdr;
+	struct qeth_snmp_cmd cmd;
+} __attribute__((packed));
+
 struct qeth_ipacmd_setadpparms_hdr {
 	__u32 supp_hw_cmds;
 	__u32 reserved1;
@@ -313,6 +337,7 @@ struct qeth_ipacmd_setadpparms {
 	union {
 		struct qeth_query_cmds_supp query_cmds_supp;
 		struct qeth_change_addr change_addr;
+		struct qeth_snmp_cmd snmp;
 		__u32 mode;
 	} data;
 } __attribute__ ((packed));

drivers/s390/net/qeth_proc.c

 /*
  *
- * linux/drivers/s390/net/qeth_fs.c ($Revision: 1.9 $)
+ * linux/drivers/s390/net/qeth_fs.c ($Revision: 1.10 $)
  *
  * Linux on zSeries OSA Express and HiperSockets support
  * This file contains code related to procfs.
@@ -21,7 +21,7 @@
 #include "qeth_mpc.h"
 #include "qeth_fs.h"
 
-const char *VERSION_QETH_PROC_C = "$Revision: 1.9 $";
+const char *VERSION_QETH_PROC_C = "$Revision: 1.10 $";
 
 /***** /proc/qeth *****/
 #define QETH_PROCFILE_NAME "qeth"
@@ -237,9 +237,11 @@ qeth_perf_procfile_seq_show(struct seq_file *s, void *it)
 		   card->perf_stats.bufs_sent_pack
 		  );
 	seq_printf(s, "  Packing state changes no pkg.->packing : %i/%i\n"
+		      "  Watermarks L/H                         : %i/%i\n"
 		      "  Current buffer usage (outbound q's)    : "
 		      "%i/%i/%i/%i\n\n",
 		        card->perf_stats.sc_dp_p, card->perf_stats.sc_p_dp,
+			QETH_LOW_WATERMARK_PACK, QETH_HIGH_WATERMARK_PACK,
 			atomic_read(&card->qdio.out_qs[0]->used_buffers),
 			(card->qdio.no_out_queues > 1)?
 				atomic_read(&card->qdio.out_qs[1]->used_buffers)
@@ -251,20 +253,26 @@ qeth_perf_procfile_seq_show(struct seq_file *s, void *it)
 				atomic_read(&card->qdio.out_qs[3]->used_buffers)
 				: 0
 		  );
-	seq_printf(s, "  Inbound time (in us)                   : %i\n"
-		      "  Inbound count                          : %i\n"
-		      "  Inboud do_QDIO count                   : %i\n"
+	seq_printf(s, "  Inbound handler time (in us)           : %i\n"
+		      "  Inbound handler count                  : %i\n"
+		      "  Inbound do_QDIO time (in us)           : %i\n"
+		      "  Inbound do_QDIO count                  : %i\n\n"
+		      "  Outbound handler time (in us)          : %i\n"
+		      "  Outbound handler count                 : %i\n\n"
 		      "  Outbound time (in us, incl QDIO)       : %i\n"
 		      "  Outbound count                         : %i\n"
-		      "  Outbound do_QDIO count                 : %i\n"
-		      "  Watermarks L/H                         : %i/%i\n\n",
+		      "  Outbound do_QDIO time (in us)          : %i\n"
+		      "  Outbound do_QDIO count                 : %i\n",
 		        card->perf_stats.inbound_time,
 			card->perf_stats.inbound_cnt,
-			card->perf_stats.inbound_do_qdio,
+		        card->perf_stats.inbound_do_qdio_time,
+			card->perf_stats.inbound_do_qdio_cnt,
+			card->perf_stats.outbound_handler_time,
+			card->perf_stats.outbound_handler_cnt,
 			card->perf_stats.outbound_time,
 			card->perf_stats.outbound_cnt,
-			card->perf_stats.outbound_do_qdio,
-			QETH_LOW_WATERMARK_PACK, QETH_HIGH_WATERMARK_PACK
+		        card->perf_stats.outbound_do_qdio_time,
+			card->perf_stats.outbound_do_qdio_cnt
 		  );
 
 	return 0;

drivers/s390/net/qeth_sys.c

 /*
  *
- * linux/drivers/s390/net/qeth_sys.c ($Revision: 1.29 $)
+ * linux/drivers/s390/net/qeth_sys.c ($Revision: 1.30 $)
  *
  * Linux on zSeries OSA Express and HiperSockets support
  * This file contains code related to sysfs.
@@ -20,7 +20,7 @@
 #include "qeth_mpc.h"
 #include "qeth_fs.h"
 
-const char *VERSION_QETH_SYS_C = "$Revision: 1.29 $";
+const char *VERSION_QETH_SYS_C = "$Revision: 1.30 $";
 
 /*****************************************************************************/
 /*                                                                           */
@@ -322,7 +322,8 @@ static DEVICE_ATTR(buffer_count, 0644, qeth_dev_bufcnt_show,
 		qeth_dev_bufcnt_store);
 
 static inline ssize_t
-qeth_dev_route_show(struct qeth_routing_info *route, char *buf)
+qeth_dev_route_show(struct qeth_card *card, struct qeth_routing_info *route,
+		    char *buf)
 {
 	switch (route->type) {
 	case PRIMARY_ROUTER:
@@ -330,11 +331,20 @@ qeth_dev_route_show(struct qeth_routing_info *route, char *buf)
 	case SECONDARY_ROUTER:
 		return sprintf(buf, "%s\n", "secondary router");
 	case MULTICAST_ROUTER:
-		return sprintf(buf, "%s\n", "multicast router");
+		if (card->info.broadcast_capable == QETH_BROADCAST_WITHOUT_ECHO)
+			return sprintf(buf, "%s\n", "multicast router+");
+		else
+			return sprintf(buf, "%s\n", "multicast router");
 	case PRIMARY_CONNECTOR:
-		return sprintf(buf, "%s\n", "primary connector");
+		if (card->info.broadcast_capable == QETH_BROADCAST_WITHOUT_ECHO)
+			return sprintf(buf, "%s\n", "primary connector+");
+		else
+			return sprintf(buf, "%s\n", "primary connector");
 	case SECONDARY_CONNECTOR:
-		return sprintf(buf, "%s\n", "secondary connector");
+		if (card->info.broadcast_capable == QETH_BROADCAST_WITHOUT_ECHO)
+			return sprintf(buf, "%s\n", "secondary connector+");
+		else
+			return sprintf(buf, "%s\n", "secondary connector");
 	default:
 		return sprintf(buf, "%s\n", "no");
 	}
@@ -348,7 +358,7 @@ qeth_dev_route4_show(struct device *dev, char *buf)
 	if (!card)
 		return -EINVAL;
 
-	return qeth_dev_route_show(&card->options.route4, buf);
+	return qeth_dev_route_show(card, &card->options.route4, buf);
 }
 
 static inline ssize_t
@@ -416,7 +426,7 @@ qeth_dev_route6_show(struct device *dev, char *buf)
 	if (!qeth_is_supported(card, IPA_IPV6))
 		return sprintf(buf, "%s\n", "n/a");
 
-	return qeth_dev_route_show(&card->options.route6, buf);
+	return qeth_dev_route_show(card, &card->options.route6, buf);
 }
 
 static ssize_t
@@ -1432,22 +1442,31 @@ qeth_driver_group_store(struct device_driver *ddrv, const char *buf,
 static DRIVER_ATTR(group, 0200, 0, qeth_driver_group_store);
 
 static ssize_t
-qeth_driver_snmp_register_show(struct device_driver *ddrv, char *buf)
-{
-	/* TODO */
-	return 0;
-}
-
-static ssize_t
-qeth_driver_snmp_register_store(struct device_driver *ddrv, const char *buf,
+qeth_driver_notifier_register_store(struct device_driver *ddrv, const char *buf,
 				size_t count)
 {
-	/* TODO */
+	int rc;
+	int signum;
+	char *tmp;
+
+	tmp = strsep((char **) &buf, "\n");
+	if (!strcmp(tmp, "unregister")){
+		return qeth_notifier_unregister(current);
+	}
+
+	signum = simple_strtoul(buf, &tmp, 10);
+	if ((signum < 0) || (signum > 32)){
+		PRINT_WARN("Signal number %d is out of range\n", signum);
+		return -EINVAL;
+	}
+	if ((rc = qeth_notifier_register(current, signum)))
+		return rc;
+
 	return count;
 }
 
-static DRIVER_ATTR(snmp_register, 0644, qeth_driver_snmp_register_show,
-		   qeth_driver_snmp_register_store);
+static DRIVER_ATTR(notifier_register, 0644, 0,
+		   qeth_driver_notifier_register_store);
 
 int
 qeth_create_driver_attributes(void)
@@ -1458,7 +1477,7 @@ qeth_create_driver_attributes(void)
 				     &driver_attr_group)))
 		return rc;
 	return driver_create_file(&qeth_ccwgroup_driver.driver,
-				  &driver_attr_snmp_register);
+				  &driver_attr_notifier_register);
 }
 
 void
@@ -1467,5 +1486,5 @@ qeth_remove_driver_attributes(void)
 	driver_remove_file(&qeth_ccwgroup_driver.driver,
 			&driver_attr_group);
 	driver_remove_file(&qeth_ccwgroup_driver.driver,
-			&driver_attr_snmp_register);
+			&driver_attr_notifier_register);
 }

include/asm-s390/qeth.h

@@ -8,8 +8,8 @@
  * Author(s):	Thomas Spatzier <tspat@de.ibm.com>
  *
  */
-#ifndef __ASM_S390_IOCTL_H__
-#define __ASM_S390_IOCTL_H__
+#ifndef __ASM_S390_QETH_IOCTL_H__
+#define __ASM_S390_QETH_IOCTL_H__
 #include <linux/ioctl.h>
 
 #define SIOC_QETH_ARP_SET_NO_ENTRIES    (SIOCDEVPRIVATE)
@@ -35,6 +35,13 @@ struct qeth_arp_qi_entry7 {
 	__u8 ipaddr[4];
 } __attribute__((packed));
 
+struct qeth_arp_qi_entry7_short {
+	__u8 macaddr_type;
+	__u8 ipaddr_type;
+	__u8 macaddr[6];
+	__u8 ipaddr[4];
+} __attribute__((packed));
+
 struct qeth_arp_qi_entry5 {
 	__u8 media_specific[32];
 	__u8 macaddr_type;
@@ -42,6 +49,19 @@ struct qeth_arp_qi_entry5 {
 	__u8 ipaddr[4];
 } __attribute__((packed));
 
+struct qeth_arp_qi_entry5_short {
+	__u8 macaddr_type;
+	__u8 ipaddr_type;
+	__u8 ipaddr[4];
+} __attribute__((packed));
+
+/*
+ * can be set by user if no "media specific information" is wanted
+ * -> saves a lot of space in user space buffer
+ */
+#define QETH_QARP_STRIP_ENTRIES  0x8000
+#define QETH_QARP_REQUEST_MASK   0x00ff
+
 /* data sent to user space as result of query arp ioctl */
 #define QETH_QARP_USER_DATA_SIZE 20000
 #define QETH_QARP_MASK_OFFSET    4
@@ -55,4 +75,4 @@ struct qeth_arp_query_user_data {
 	char *entries;
 } __attribute__((packed));
 
-#endif /* __ASM_S390_IOCTL_H__ */
+#endif /* __ASM_S390_QETH_IOCTL_H__ */