66a464dbc8
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>
127 lines
3.6 KiB
C
127 lines
3.6 KiB
C
/*
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*
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* linux/drivers/s390/net/ctcdbug.h ($Revision: 1.6 $)
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*
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* CTC / ESCON network driver - s390 dbf exploit.
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*
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* Copyright 2000,2003 IBM Corporation
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*
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* Author(s): Original Code written by
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* Peter Tiedemann (ptiedem@de.ibm.com)
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*
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* $Revision: 1.6 $ $Date: 2005/05/11 08:10:17 $
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#ifndef _CTCDBUG_H_
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#define _CTCDBUG_H_
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#include <asm/debug.h>
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#include "ctcmain.h"
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/**
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* Debug Facility stuff
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*/
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#define CTC_DBF_SETUP_NAME "ctc_setup"
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#define CTC_DBF_SETUP_LEN 16
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#define CTC_DBF_SETUP_PAGES 8
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#define CTC_DBF_SETUP_NR_AREAS 1
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#define CTC_DBF_SETUP_LEVEL 3
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#define CTC_DBF_DATA_NAME "ctc_data"
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#define CTC_DBF_DATA_LEN 128
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#define CTC_DBF_DATA_PAGES 8
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#define CTC_DBF_DATA_NR_AREAS 1
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#define CTC_DBF_DATA_LEVEL 3
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#define CTC_DBF_TRACE_NAME "ctc_trace"
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#define CTC_DBF_TRACE_LEN 16
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#define CTC_DBF_TRACE_PAGES 4
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#define CTC_DBF_TRACE_NR_AREAS 2
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#define CTC_DBF_TRACE_LEVEL 3
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#define DBF_TEXT(name,level,text) \
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do { \
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debug_text_event(ctc_dbf_##name,level,text); \
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} while (0)
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#define DBF_HEX(name,level,addr,len) \
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do { \
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debug_event(ctc_dbf_##name,level,(void*)(addr),len); \
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} while (0)
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DECLARE_PER_CPU(char[256], ctc_dbf_txt_buf);
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extern debug_info_t *ctc_dbf_setup;
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extern debug_info_t *ctc_dbf_data;
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extern debug_info_t *ctc_dbf_trace;
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#define DBF_TEXT_(name,level,text...) \
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do { \
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char* ctc_dbf_txt_buf = get_cpu_var(ctc_dbf_txt_buf); \
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sprintf(ctc_dbf_txt_buf, text); \
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debug_text_event(ctc_dbf_##name,level,ctc_dbf_txt_buf); \
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put_cpu_var(ctc_dbf_txt_buf); \
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} while (0)
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#define DBF_SPRINTF(name,level,text...) \
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do { \
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debug_sprintf_event(ctc_dbf_trace, level, ##text ); \
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debug_sprintf_event(ctc_dbf_trace, level, text ); \
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} while (0)
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int ctc_register_dbf_views(void);
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void ctc_unregister_dbf_views(void);
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/**
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* some more debug stuff
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*/
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#define HEXDUMP16(importance,header,ptr) \
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PRINT_##importance(header "%02x %02x %02x %02x %02x %02x %02x %02x " \
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"%02x %02x %02x %02x %02x %02x %02x %02x\n", \
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*(((char*)ptr)),*(((char*)ptr)+1),*(((char*)ptr)+2), \
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*(((char*)ptr)+3),*(((char*)ptr)+4),*(((char*)ptr)+5), \
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*(((char*)ptr)+6),*(((char*)ptr)+7),*(((char*)ptr)+8), \
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*(((char*)ptr)+9),*(((char*)ptr)+10),*(((char*)ptr)+11), \
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*(((char*)ptr)+12),*(((char*)ptr)+13), \
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*(((char*)ptr)+14),*(((char*)ptr)+15)); \
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PRINT_##importance(header "%02x %02x %02x %02x %02x %02x %02x %02x " \
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"%02x %02x %02x %02x %02x %02x %02x %02x\n", \
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*(((char*)ptr)+16),*(((char*)ptr)+17), \
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*(((char*)ptr)+18),*(((char*)ptr)+19), \
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*(((char*)ptr)+20),*(((char*)ptr)+21), \
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*(((char*)ptr)+22),*(((char*)ptr)+23), \
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*(((char*)ptr)+24),*(((char*)ptr)+25), \
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*(((char*)ptr)+26),*(((char*)ptr)+27), \
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*(((char*)ptr)+28),*(((char*)ptr)+29), \
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*(((char*)ptr)+30),*(((char*)ptr)+31));
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static inline void
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hex_dump(unsigned char *buf, size_t len)
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{
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size_t i;
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for (i = 0; i < len; i++) {
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if (i && !(i % 16))
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printk("\n");
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printk("%02x ", *(buf + i));
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}
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printk("\n");
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}
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#endif
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