diff options
Diffstat (limited to 'drivers/char/ftape/lowlevel/ftape-tracing.h')
| -rw-r--r-- | drivers/char/ftape/lowlevel/ftape-tracing.h | 180 |
1 files changed, 180 insertions, 0 deletions
diff --git a/drivers/char/ftape/lowlevel/ftape-tracing.h b/drivers/char/ftape/lowlevel/ftape-tracing.h new file mode 100644 index 000000000000..fa7cd20ee66c --- /dev/null +++ b/drivers/char/ftape/lowlevel/ftape-tracing.h @@ -0,0 +1,180 @@ +#ifndef _FTAPE_TRACING_H +#define _FTAPE_TRACING_H + +/* + * Copyright (C) 1994-1996 Bas Laarhoven, + * (C) 1996-1997 Claus-Justus Heine. + + 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 + the Free Software Foundation; either version 2, or (at your option) + any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; see the file COPYING. If not, write to + the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. + + * + * $Source: /homes/cvs/ftape-stacked/ftape/lowlevel/ftape-tracing.h,v $ + * $Revision: 1.2 $ + * $Date: 1997/10/05 19:18:28 $ + * + * This file contains definitions that eases the debugging of the + * QIC-40/80/3010/3020 floppy-tape driver "ftape" for Linux. + */ + +#include <linux/config.h> +#include <linux/kernel.h> + +/* + * Be very careful with TRACE_EXIT and TRACE_ABORT. + * + * if (something) TRACE_EXIT error; + * + * will NOT work. Use + * + * if (something) { + * TRACE_EXIT error; + * } + * + * instead. Maybe a bit dangerous, but save lots of lines of code. + */ + +#define LL_X "%d/%d KB" +#define LL(x) (unsigned int)((__u64)(x)>>10), (unsigned int)((x)&1023) + +typedef enum { + ft_t_nil = -1, + ft_t_bug, + ft_t_err, + ft_t_warn, + ft_t_info, + ft_t_noise, + ft_t_flow, + ft_t_fdc_dma, + ft_t_data_flow, + ft_t_any +} ft_trace_t; + +#ifdef CONFIG_FT_NO_TRACE_AT_ALL +/* the compiler will optimize away most TRACE() macros + */ +#define FT_TRACE_TOP_LEVEL ft_t_bug +#define TRACE_FUN(level) do {} while(0) +#define TRACE_EXIT return +#define TRACE(l, m, i...) \ +{ \ + if ((ft_trace_t)(l) == FT_TRACE_TOP_LEVEL) { \ + printk(KERN_INFO"ftape%s(%s):\n" \ + KERN_INFO m".\n" ,__FILE__, __FUNCTION__ , ##i); \ + } \ +} +#define SET_TRACE_LEVEL(l) if ((l) == (l)) do {} while(0) +#define TRACE_LEVEL FT_TRACE_TOP_LEVEL + +#else + +#ifdef CONFIG_FT_NO_TRACE +/* the compiler will optimize away many TRACE() macros + * the ftape_simple_trace_call() function simply increments + * the function nest level. + */ +#define FT_TRACE_TOP_LEVEL ft_t_warn +#define TRACE_FUN(level) ftape_function_nest_level++ +#define TRACE_EXIT ftape_function_nest_level--; return + +#else +#ifdef CONFIG_FT_FULL_DEBUG +#define FT_TRACE_TOP_LEVEL ft_t_any +#else +#define FT_TRACE_TOP_LEVEL ft_t_flow +#endif +#define TRACE_FUN(level) \ + const ft_trace_t _tracing = level; \ + if (ftape_tracing >= (ft_trace_t)(level) && \ + (ft_trace_t)(level) <= FT_TRACE_TOP_LEVEL) \ + ftape_trace_call(__FILE__, __FUNCTION__); \ + ftape_function_nest_level ++; + +#define TRACE_EXIT \ + --ftape_function_nest_level; \ + if (ftape_tracing >= (ft_trace_t)(_tracing) && \ + (ft_trace_t)(_tracing) <= FT_TRACE_TOP_LEVEL) \ + ftape_trace_exit(__FILE__, __FUNCTION__); \ + return + +#endif + +#define TRACE(l, m, i...) \ +{ \ + if (ftape_tracing >= (ft_trace_t)(l) && \ + (ft_trace_t)(l) <= FT_TRACE_TOP_LEVEL) { \ + ftape_trace_log(__FILE__, __FUNCTION__); \ + printk(m".\n" ,##i); \ + } \ +} + +#define SET_TRACE_LEVEL(l) \ +{ \ + if ((ft_trace_t)(l) <= FT_TRACE_TOP_LEVEL) { \ + ftape_tracing = (ft_trace_t)(l); \ + } else { \ + ftape_tracing = FT_TRACE_TOP_LEVEL; \ + } \ +} +#define TRACE_LEVEL \ +((ftape_tracing <= FT_TRACE_TOP_LEVEL) ? ftape_tracing : FT_TRACE_TOP_LEVEL) + + +/* Global variables declared in tracing.c + */ +extern ft_trace_t ftape_tracing; /* sets default level */ +extern int ftape_function_nest_level; + +/* Global functions declared in tracing.c + */ +extern void ftape_trace_call(const char *file, const char *name); +extern void ftape_trace_exit(const char *file, const char *name); +extern void ftape_trace_log (const char *file, const char *name); + +#endif /* !defined(CONFIG_FT_NO_TRACE_AT_ALL) */ + +/* + * Abort with a message. + */ +#define TRACE_ABORT(res, i...) \ +{ \ + TRACE(i); \ + TRACE_EXIT res; \ +} + +/* The following transforms the common "if(result < 0) ... " into a + * one-liner. + */ +#define _TRACE_CATCH(level, fun, action) \ +{ \ + int _res = (fun); \ + if (_res < 0) { \ + do { action /* */ ; } while(0); \ + TRACE_ABORT(_res, level, "%s failed: %d", #fun, _res); \ + } \ +} + +#define TRACE_CATCH(fun, fail) _TRACE_CATCH(ft_t_err, fun, fail) + +/* Abort the current function when signalled. This doesn't belong here, + * but rather into ftape-rw.h (maybe) + */ +#define FT_SIGNAL_EXIT(sig_mask) \ + if (sigtestsetmask(¤t->pending.signal, sig_mask)) { \ + TRACE_ABORT(-EINTR, \ + ft_t_warn, \ + "interrupted by non-blockable signal"); \ + } + +#endif /* _FTAPE_TRACING_H */ |