[PATCH] s390: debug feature changes

This patch changes the memory allocation method for the s390 debug feature.
Trace buffers had been allocated using the get_free_pages() function before.
Therefore it was not possible to get big memory areas in a running system due
to memory fragmentation.  Now the trace buffers are subdivided into several
subbuffers with pagesize.  Therefore it is now possible to allocate more
memory for the trace buffers and more trace records can be written.

In addition to that, dynamic specification of the size of the trace buffers is
implemented.  It is now possible to change the size of a trace buffer using a
new debugfs file instance.  When writing a number into this file, the trace
buffer size is changed to 'number * pagesize'.

In the past all the traces could be obtained from userspace by accessing files
in the "proc" filesystem.  Now with debugfs we have a new filesystem which
should be used for debugging purposes.  This patch moves the debug feature
from procfs to debugfs.

Since the interface of debug_register() changed, all device drivers, which use
the debug feature had to be adjusted.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

8 files changed, 39 insertions, 39 deletions

diff --git a/drivers/s390/net/claw.c b/drivers/s390/net/claw.c
index a99927d54ebb..60440dbe3a27 100644
--- a/drivers/s390/net/claw.c
+++ b/drivers/s390/net/claw.c
@@ -146,8 +146,8 @@ claw_unregister_debug_facility(void)
 static int
 claw_register_debug_facility(void)
 {
-        claw_dbf_setup = debug_register("claw_setup", 1, 1, 8);
-        claw_dbf_trace = debug_register("claw_trace", 1, 2, 8);
+        claw_dbf_setup = debug_register("claw_setup", 2, 1, 8);
+        claw_dbf_trace = debug_register("claw_trace", 2, 2, 8);
         if (claw_dbf_setup == NULL || claw_dbf_trace == NULL) {
                 printk(KERN_WARNING "Not enough memory for debug facility.\n");
                 claw_unregister_debug_facility();
diff --git a/drivers/s390/net/ctcdbug.c b/drivers/s390/net/ctcdbug.c
index 2c86bfa11b2f..0e2a8bb93032 100644
--- a/drivers/s390/net/ctcdbug.c
+++ b/drivers/s390/net/ctcdbug.c
@@ -1,6 +1,6 @@
 /*
  *
- * linux/drivers/s390/net/ctcdbug.c ($Revision: 1.4 $)
+ * linux/drivers/s390/net/ctcdbug.c ($Revision: 1.6 $)
  *
  * CTC / ESCON network driver - s390 dbf exploit.
  *
@@ -9,7 +9,7 @@
  *    Author(s): Original Code written by
  *                        Peter Tiedemann (ptiedem@de.ibm.com)
  *
- *    $Revision: 1.4 $   $Date: 2004/08/04 10:11:59 $
+ *    $Revision: 1.6 $   $Date: 2005/05/11 08:10:17 $
  *
  * 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
@@ -51,15 +51,15 @@ int
 ctc_register_dbf_views(void)
 {
         ctc_dbf_setup = debug_register(CTC_DBF_SETUP_NAME,
-                                        CTC_DBF_SETUP_INDEX,
+                                        CTC_DBF_SETUP_PAGES,
                                         CTC_DBF_SETUP_NR_AREAS,
                                         CTC_DBF_SETUP_LEN);
         ctc_dbf_data = debug_register(CTC_DBF_DATA_NAME,
-                                       CTC_DBF_DATA_INDEX,
+                                       CTC_DBF_DATA_PAGES,
                                        CTC_DBF_DATA_NR_AREAS,
                                        CTC_DBF_DATA_LEN);
         ctc_dbf_trace = debug_register(CTC_DBF_TRACE_NAME,
-                                        CTC_DBF_TRACE_INDEX,
+                                        CTC_DBF_TRACE_PAGES,
                                         CTC_DBF_TRACE_NR_AREAS,
                                         CTC_DBF_TRACE_LEN);
 
diff --git a/drivers/s390/net/ctcdbug.h b/drivers/s390/net/ctcdbug.h
index 7fe2ebd1792d..7d6afa1627c3 100644
--- a/drivers/s390/net/ctcdbug.h
+++ b/drivers/s390/net/ctcdbug.h
@@ -1,6 +1,6 @@
 /*
  *
- * linux/drivers/s390/net/ctcdbug.h ($Revision: 1.5 $)
+ * linux/drivers/s390/net/ctcdbug.h ($Revision: 1.6 $)
  *
  * CTC / ESCON network driver - s390 dbf exploit.
  *
@@ -9,7 +9,7 @@
  *    Author(s): Original Code written by
  *                        Peter Tiedemann (ptiedem@de.ibm.com)
  *
- *    $Revision: 1.5 $   $Date: 2005/02/27 19:46:44 $
+ *    $Revision: 1.6 $   $Date: 2005/05/11 08:10:17 $
  *
  * 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
@@ -35,19 +35,19 @@
  */
 #define CTC_DBF_SETUP_NAME "ctc_setup"
 #define CTC_DBF_SETUP_LEN 16
-#define CTC_DBF_SETUP_INDEX 3
+#define CTC_DBF_SETUP_PAGES 8
 #define CTC_DBF_SETUP_NR_AREAS 1
 #define CTC_DBF_SETUP_LEVEL 3
 
 #define CTC_DBF_DATA_NAME "ctc_data"
 #define CTC_DBF_DATA_LEN 128
-#define CTC_DBF_DATA_INDEX 3
+#define CTC_DBF_DATA_PAGES 8
 #define CTC_DBF_DATA_NR_AREAS 1
 #define CTC_DBF_DATA_LEVEL 3
 
 #define CTC_DBF_TRACE_NAME "ctc_trace"
 #define CTC_DBF_TRACE_LEN 16
-#define CTC_DBF_TRACE_INDEX 2
+#define CTC_DBF_TRACE_PAGES 4
 #define CTC_DBF_TRACE_NR_AREAS 2
 #define CTC_DBF_TRACE_LEVEL 3
 
diff --git a/drivers/s390/net/iucv.h b/drivers/s390/net/iucv.h
index 198330217eff..0c4644d3d2f3 100644
--- a/drivers/s390/net/iucv.h
+++ b/drivers/s390/net/iucv.h
@@ -37,19 +37,19 @@
  */
 #define IUCV_DBF_SETUP_NAME "iucv_setup"
 #define IUCV_DBF_SETUP_LEN 32
-#define IUCV_DBF_SETUP_INDEX 1
+#define IUCV_DBF_SETUP_PAGES 2
 #define IUCV_DBF_SETUP_NR_AREAS 1
 #define IUCV_DBF_SETUP_LEVEL 3
 
 #define IUCV_DBF_DATA_NAME "iucv_data"
 #define IUCV_DBF_DATA_LEN 128
-#define IUCV_DBF_DATA_INDEX 1
+#define IUCV_DBF_DATA_PAGES 2
 #define IUCV_DBF_DATA_NR_AREAS 1
 #define IUCV_DBF_DATA_LEVEL 2
 
 #define IUCV_DBF_TRACE_NAME "iucv_trace"
 #define IUCV_DBF_TRACE_LEN 16
-#define IUCV_DBF_TRACE_INDEX 2
+#define IUCV_DBF_TRACE_PAGES 4
 #define IUCV_DBF_TRACE_NR_AREAS 1
 #define IUCV_DBF_TRACE_LEVEL 3
 
diff --git a/drivers/s390/net/lcs.c b/drivers/s390/net/lcs.c
index ab086242d305..46f34ba93ac5 100644
--- a/drivers/s390/net/lcs.c
+++ b/drivers/s390/net/lcs.c
@@ -11,7 +11,7 @@
  *                        Frank Pavlic (pavlic@de.ibm.com) and
  *                        Martin Schwidefsky <schwidefsky@de.ibm.com>
  *
- *    $Revision: 1.98 $  $Date: 2005/04/18 13:41:29 $
+ *    $Revision: 1.99 $  $Date: 2005/05/11 08:10:17 $
  *
  * 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
@@ -59,7 +59,7 @@
 /**
  * initialization string for output
  */
-#define VERSION_LCS_C  "$Revision: 1.98 $"
+#define VERSION_LCS_C  "$Revision: 1.99 $"
 
 static char version[] __initdata = "LCS driver ("VERSION_LCS_C "/" VERSION_LCS_H ")";
 static char debug_buffer[255];
@@ -93,8 +93,8 @@ lcs_unregister_debug_facility(void)
 static int
 lcs_register_debug_facility(void)
 {
-        lcs_dbf_setup = debug_register("lcs_setup", 1, 1, 8);
-        lcs_dbf_trace = debug_register("lcs_trace", 1, 2, 8);
+        lcs_dbf_setup = debug_register("lcs_setup", 2, 1, 8);
+        lcs_dbf_trace = debug_register("lcs_trace", 2, 2, 8);
         if (lcs_dbf_setup == NULL || lcs_dbf_trace == NULL) {
                 PRINT_ERR("Not enough memory for debug facility.\n");
                 lcs_unregister_debug_facility();
diff --git a/drivers/s390/net/netiucv.c b/drivers/s390/net/netiucv.c
index 3fd4fb754b2d..69425a7a6e98 100644
--- a/drivers/s390/net/netiucv.c
+++ b/drivers/s390/net/netiucv.c
@@ -1,5 +1,5 @@
 /*
- * $Id: netiucv.c,v 1.63 2004/07/27 13:36:05 mschwide Exp $
+ * $Id: netiucv.c,v 1.66 2005/05/11 08:10:17 holzheu Exp $
  *
  * IUCV network driver
  *
@@ -30,7 +30,7 @@
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  *
- * RELEASE-TAG: IUCV network driver $Revision: 1.63 $
+ * RELEASE-TAG: IUCV network driver $Revision: 1.66 $
  *
  */
 
@@ -391,15 +391,15 @@ static int
 iucv_register_dbf_views(void)
 {
         iucv_dbf_setup = debug_register(IUCV_DBF_SETUP_NAME,
-                                        IUCV_DBF_SETUP_INDEX,
+                                        IUCV_DBF_SETUP_PAGES,
                                         IUCV_DBF_SETUP_NR_AREAS,
                                         IUCV_DBF_SETUP_LEN);
         iucv_dbf_data = debug_register(IUCV_DBF_DATA_NAME,
-                                       IUCV_DBF_DATA_INDEX,
+                                       IUCV_DBF_DATA_PAGES,
                                        IUCV_DBF_DATA_NR_AREAS,
                                        IUCV_DBF_DATA_LEN);
         iucv_dbf_trace = debug_register(IUCV_DBF_TRACE_NAME,
-                                        IUCV_DBF_TRACE_INDEX,
+                                        IUCV_DBF_TRACE_PAGES,
                                         IUCV_DBF_TRACE_NR_AREAS,
                                         IUCV_DBF_TRACE_LEN);
 
@@ -2076,7 +2076,7 @@ DRIVER_ATTR(remove, 0200, NULL, remove_write);
 static void
 netiucv_banner(void)
 {
-        char vbuf[] = "$Revision: 1.63 $";
+        char vbuf[] = "$Revision: 1.66 $";
         char *version = vbuf;
 
         if ((version = strchr(version, ':'))) {
diff --git a/drivers/s390/net/qeth.h b/drivers/s390/net/qeth.h
index a755b57db46b..008e0a5d2eb3 100644
--- a/drivers/s390/net/qeth.h
+++ b/drivers/s390/net/qeth.h
@@ -42,44 +42,44 @@
  */
 #define QETH_DBF_SETUP_NAME "qeth_setup"
 #define QETH_DBF_SETUP_LEN 8
-#define QETH_DBF_SETUP_INDEX 3
+#define QETH_DBF_SETUP_PAGES 8
 #define QETH_DBF_SETUP_NR_AREAS 1
 #define QETH_DBF_SETUP_LEVEL 5
 
 #define QETH_DBF_MISC_NAME "qeth_misc"
 #define QETH_DBF_MISC_LEN 128
-#define QETH_DBF_MISC_INDEX 1
+#define QETH_DBF_MISC_PAGES 2
 #define QETH_DBF_MISC_NR_AREAS 1
 #define QETH_DBF_MISC_LEVEL 2
 
 #define QETH_DBF_DATA_NAME "qeth_data"
 #define QETH_DBF_DATA_LEN 96
-#define QETH_DBF_DATA_INDEX 3
+#define QETH_DBF_DATA_PAGES 8
 #define QETH_DBF_DATA_NR_AREAS 1
 #define QETH_DBF_DATA_LEVEL 2
 
 #define QETH_DBF_CONTROL_NAME "qeth_control"
 #define QETH_DBF_CONTROL_LEN 256
-#define QETH_DBF_CONTROL_INDEX 3
+#define QETH_DBF_CONTROL_PAGES 8
 #define QETH_DBF_CONTROL_NR_AREAS 2
 #define QETH_DBF_CONTROL_LEVEL 5
 
 #define QETH_DBF_TRACE_NAME "qeth_trace"
 #define QETH_DBF_TRACE_LEN 8
-#define QETH_DBF_TRACE_INDEX 2
+#define QETH_DBF_TRACE_PAGES 4
 #define QETH_DBF_TRACE_NR_AREAS 2
 #define QETH_DBF_TRACE_LEVEL 3
 extern debug_info_t *qeth_dbf_trace;
 
 #define QETH_DBF_SENSE_NAME "qeth_sense"
 #define QETH_DBF_SENSE_LEN 64
-#define QETH_DBF_SENSE_INDEX 1
+#define QETH_DBF_SENSE_PAGES 2
 #define QETH_DBF_SENSE_NR_AREAS 1
 #define QETH_DBF_SENSE_LEVEL 2
 
 #define QETH_DBF_QERR_NAME "qeth_qerr"
 #define QETH_DBF_QERR_LEN 8
-#define QETH_DBF_QERR_INDEX 1
+#define QETH_DBF_QERR_PAGES 2
 #define QETH_DBF_QERR_NR_AREAS 2
 #define QETH_DBF_QERR_LEVEL 2
 
diff --git a/drivers/s390/net/qeth_main.c b/drivers/s390/net/qeth_main.c
index 208127a5033a..3cb88c770037 100644
--- a/drivers/s390/net/qeth_main.c
+++ b/drivers/s390/net/qeth_main.c
@@ -7639,31 +7639,31 @@ static int
 qeth_register_dbf_views(void)
 {
         qeth_dbf_setup = debug_register(QETH_DBF_SETUP_NAME,
-                                        QETH_DBF_SETUP_INDEX,
+                                        QETH_DBF_SETUP_PAGES,
                                         QETH_DBF_SETUP_NR_AREAS,
                                         QETH_DBF_SETUP_LEN);
         qeth_dbf_misc = debug_register(QETH_DBF_MISC_NAME,
-                                       QETH_DBF_MISC_INDEX,
+                                       QETH_DBF_MISC_PAGES,
                                        QETH_DBF_MISC_NR_AREAS,
                                        QETH_DBF_MISC_LEN);
         qeth_dbf_data = debug_register(QETH_DBF_DATA_NAME,
-                                       QETH_DBF_DATA_INDEX,
+                                       QETH_DBF_DATA_PAGES,
                                        QETH_DBF_DATA_NR_AREAS,
                                        QETH_DBF_DATA_LEN);
         qeth_dbf_control = debug_register(QETH_DBF_CONTROL_NAME,
-                                          QETH_DBF_CONTROL_INDEX,
+                                          QETH_DBF_CONTROL_PAGES,
                                           QETH_DBF_CONTROL_NR_AREAS,
                                           QETH_DBF_CONTROL_LEN);
         qeth_dbf_sense = debug_register(QETH_DBF_SENSE_NAME,
-                                        QETH_DBF_SENSE_INDEX,
+                                        QETH_DBF_SENSE_PAGES,
                                         QETH_DBF_SENSE_NR_AREAS,
                                         QETH_DBF_SENSE_LEN);
         qeth_dbf_qerr = debug_register(QETH_DBF_QERR_NAME,
-                                       QETH_DBF_QERR_INDEX,
+                                       QETH_DBF_QERR_PAGES,
                                        QETH_DBF_QERR_NR_AREAS,
                                        QETH_DBF_QERR_LEN);
         qeth_dbf_trace = debug_register(QETH_DBF_TRACE_NAME,
-                                        QETH_DBF_TRACE_INDEX,
+                                        QETH_DBF_TRACE_PAGES,
                                         QETH_DBF_TRACE_NR_AREAS,
                                         QETH_DBF_TRACE_LEN);