571 строка
16 KiB
C
571 строка
16 KiB
C
/*
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* Copyright (C) 2016 Red Hat
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*
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* Authors:
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* Rob Clark <robdclark@gmail.com>
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*/
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#ifndef DRM_PRINT_H_
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#define DRM_PRINT_H_
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#include <linux/compiler.h>
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#include <linux/printk.h>
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#include <linux/seq_file.h>
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#include <linux/device.h>
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#include <linux/debugfs.h>
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#include <drm/drm.h>
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/* Do *not* use outside of drm_print.[ch]! */
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extern unsigned int __drm_debug;
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/**
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* DOC: print
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*
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* A simple wrapper for dev_printk(), seq_printf(), etc. Allows same
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* debug code to be used for both debugfs and printk logging.
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*
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* For example::
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*
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* void log_some_info(struct drm_printer *p)
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* {
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* drm_printf(p, "foo=%d\n", foo);
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* drm_printf(p, "bar=%d\n", bar);
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* }
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*
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* #ifdef CONFIG_DEBUG_FS
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* void debugfs_show(struct seq_file *f)
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* {
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* struct drm_printer p = drm_seq_file_printer(f);
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* log_some_info(&p);
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* }
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* #endif
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*
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* void some_other_function(...)
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* {
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* struct drm_printer p = drm_info_printer(drm->dev);
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* log_some_info(&p);
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* }
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*/
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/**
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* struct drm_printer - drm output "stream"
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*
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* Do not use struct members directly. Use drm_printer_seq_file(),
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* drm_printer_info(), etc to initialize. And drm_printf() for output.
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*/
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struct drm_printer {
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/* private: */
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void (*printfn)(struct drm_printer *p, struct va_format *vaf);
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void (*puts)(struct drm_printer *p, const char *str);
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void *arg;
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const char *prefix;
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};
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void __drm_printfn_coredump(struct drm_printer *p, struct va_format *vaf);
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void __drm_puts_coredump(struct drm_printer *p, const char *str);
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void __drm_printfn_seq_file(struct drm_printer *p, struct va_format *vaf);
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void __drm_puts_seq_file(struct drm_printer *p, const char *str);
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void __drm_printfn_info(struct drm_printer *p, struct va_format *vaf);
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void __drm_printfn_debug(struct drm_printer *p, struct va_format *vaf);
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void __drm_printfn_err(struct drm_printer *p, struct va_format *vaf);
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__printf(2, 3)
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void drm_printf(struct drm_printer *p, const char *f, ...);
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void drm_puts(struct drm_printer *p, const char *str);
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void drm_print_regset32(struct drm_printer *p, struct debugfs_regset32 *regset);
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void drm_print_bits(struct drm_printer *p, unsigned long value,
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const char * const bits[], unsigned int nbits);
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__printf(2, 0)
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/**
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* drm_vprintf - print to a &drm_printer stream
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* @p: the &drm_printer
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* @fmt: format string
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* @va: the va_list
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*/
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static inline void
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drm_vprintf(struct drm_printer *p, const char *fmt, va_list *va)
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{
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struct va_format vaf = { .fmt = fmt, .va = va };
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p->printfn(p, &vaf);
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}
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/**
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* drm_printf_indent - Print to a &drm_printer stream with indentation
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* @printer: DRM printer
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* @indent: Tab indentation level (max 5)
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* @fmt: Format string
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*/
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#define drm_printf_indent(printer, indent, fmt, ...) \
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drm_printf((printer), "%.*s" fmt, (indent), "\t\t\t\t\tX", ##__VA_ARGS__)
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/**
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* struct drm_print_iterator - local struct used with drm_printer_coredump
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* @data: Pointer to the devcoredump output buffer
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* @start: The offset within the buffer to start writing
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* @remain: The number of bytes to write for this iteration
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*/
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struct drm_print_iterator {
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void *data;
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ssize_t start;
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ssize_t remain;
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/* private: */
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ssize_t offset;
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};
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/**
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* drm_coredump_printer - construct a &drm_printer that can output to a buffer
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* from the read function for devcoredump
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* @iter: A pointer to a struct drm_print_iterator for the read instance
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*
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* This wrapper extends drm_printf() to work with a dev_coredumpm() callback
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* function. The passed in drm_print_iterator struct contains the buffer
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* pointer, size and offset as passed in from devcoredump.
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*
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* For example::
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*
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* void coredump_read(char *buffer, loff_t offset, size_t count,
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* void *data, size_t datalen)
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* {
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* struct drm_print_iterator iter;
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* struct drm_printer p;
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*
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* iter.data = buffer;
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* iter.start = offset;
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* iter.remain = count;
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*
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* p = drm_coredump_printer(&iter);
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*
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* drm_printf(p, "foo=%d\n", foo);
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* }
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*
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* void makecoredump(...)
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* {
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* ...
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* dev_coredumpm(dev, THIS_MODULE, data, 0, GFP_KERNEL,
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* coredump_read, ...)
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* }
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*
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* RETURNS:
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* The &drm_printer object
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*/
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static inline struct drm_printer
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drm_coredump_printer(struct drm_print_iterator *iter)
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{
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struct drm_printer p = {
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.printfn = __drm_printfn_coredump,
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.puts = __drm_puts_coredump,
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.arg = iter,
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};
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/* Set the internal offset of the iterator to zero */
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iter->offset = 0;
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return p;
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}
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/**
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* drm_seq_file_printer - construct a &drm_printer that outputs to &seq_file
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* @f: the &struct seq_file to output to
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*
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* RETURNS:
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* The &drm_printer object
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*/
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static inline struct drm_printer drm_seq_file_printer(struct seq_file *f)
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{
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struct drm_printer p = {
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.printfn = __drm_printfn_seq_file,
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.puts = __drm_puts_seq_file,
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.arg = f,
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};
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return p;
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}
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/**
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* drm_info_printer - construct a &drm_printer that outputs to dev_printk()
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* @dev: the &struct device pointer
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*
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* RETURNS:
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* The &drm_printer object
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*/
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static inline struct drm_printer drm_info_printer(struct device *dev)
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{
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struct drm_printer p = {
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.printfn = __drm_printfn_info,
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.arg = dev,
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};
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return p;
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}
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/**
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* drm_debug_printer - construct a &drm_printer that outputs to pr_debug()
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* @prefix: debug output prefix
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*
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* RETURNS:
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* The &drm_printer object
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*/
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static inline struct drm_printer drm_debug_printer(const char *prefix)
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{
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struct drm_printer p = {
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.printfn = __drm_printfn_debug,
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.prefix = prefix
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};
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return p;
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}
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/**
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* drm_err_printer - construct a &drm_printer that outputs to pr_err()
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* @prefix: debug output prefix
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*
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* RETURNS:
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* The &drm_printer object
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*/
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static inline struct drm_printer drm_err_printer(const char *prefix)
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{
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struct drm_printer p = {
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.printfn = __drm_printfn_err,
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.prefix = prefix
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};
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return p;
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}
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/**
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* enum drm_debug_category - The DRM debug categories
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*
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* Each of the DRM debug logging macros use a specific category, and the logging
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* is filtered by the drm.debug module parameter. This enum specifies the values
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* for the interface.
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*
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* Each DRM_DEBUG_<CATEGORY> macro logs to DRM_UT_<CATEGORY> category, except
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* DRM_DEBUG() logs to DRM_UT_CORE.
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*
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* Enabling verbose debug messages is done through the drm.debug parameter, each
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* category being enabled by a bit:
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*
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* - drm.debug=0x1 will enable CORE messages
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* - drm.debug=0x2 will enable DRIVER messages
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* - drm.debug=0x3 will enable CORE and DRIVER messages
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* - ...
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* - drm.debug=0x1ff will enable all messages
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*
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* An interesting feature is that it's possible to enable verbose logging at
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* run-time by echoing the debug value in its sysfs node::
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*
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* # echo 0xf > /sys/module/drm/parameters/debug
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*
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*/
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enum drm_debug_category {
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/**
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* @DRM_UT_CORE: Used in the generic drm code: drm_ioctl.c, drm_mm.c,
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* drm_memory.c, ...
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*/
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DRM_UT_CORE = 0x01,
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/**
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* @DRM_UT_DRIVER: Used in the vendor specific part of the driver: i915,
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* radeon, ... macro.
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*/
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DRM_UT_DRIVER = 0x02,
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/**
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* @DRM_UT_KMS: Used in the modesetting code.
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*/
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DRM_UT_KMS = 0x04,
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/**
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* @DRM_UT_PRIME: Used in the prime code.
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*/
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DRM_UT_PRIME = 0x08,
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/**
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* @DRM_UT_ATOMIC: Used in the atomic code.
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*/
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DRM_UT_ATOMIC = 0x10,
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/**
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* @DRM_UT_VBL: Used for verbose debug message in the vblank code.
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*/
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DRM_UT_VBL = 0x20,
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/**
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* @DRM_UT_STATE: Used for verbose atomic state debugging.
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*/
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DRM_UT_STATE = 0x40,
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/**
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* @DRM_UT_LEASE: Used in the lease code.
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*/
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DRM_UT_LEASE = 0x80,
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/**
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* @DRM_UT_DP: Used in the DP code.
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*/
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DRM_UT_DP = 0x100,
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/**
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* @DRM_UT_DRMRES: Used in the drm managed resources code.
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*/
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DRM_UT_DRMRES = 0x200,
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};
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static inline bool drm_debug_enabled(enum drm_debug_category category)
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{
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return unlikely(__drm_debug & category);
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}
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/*
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* struct device based logging
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*
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* Prefer drm_device based logging over device or prink based logging.
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*/
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__printf(3, 4)
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void drm_dev_printk(const struct device *dev, const char *level,
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const char *format, ...);
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__printf(3, 4)
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void drm_dev_dbg(const struct device *dev, enum drm_debug_category category,
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const char *format, ...);
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/**
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* DRM_DEV_ERROR() - Error output.
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*
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* @dev: device pointer
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* @fmt: printf() like format string.
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*/
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#define DRM_DEV_ERROR(dev, fmt, ...) \
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drm_dev_printk(dev, KERN_ERR, "*ERROR* " fmt, ##__VA_ARGS__)
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/**
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* DRM_DEV_ERROR_RATELIMITED() - Rate limited error output.
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*
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* @dev: device pointer
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* @fmt: printf() like format string.
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*
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* Like DRM_ERROR() but won't flood the log.
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*/
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#define DRM_DEV_ERROR_RATELIMITED(dev, fmt, ...) \
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({ \
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static DEFINE_RATELIMIT_STATE(_rs, \
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DEFAULT_RATELIMIT_INTERVAL, \
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DEFAULT_RATELIMIT_BURST); \
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\
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if (__ratelimit(&_rs)) \
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DRM_DEV_ERROR(dev, fmt, ##__VA_ARGS__); \
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})
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#define DRM_DEV_INFO(dev, fmt, ...) \
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drm_dev_printk(dev, KERN_INFO, fmt, ##__VA_ARGS__)
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#define DRM_DEV_INFO_ONCE(dev, fmt, ...) \
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({ \
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static bool __print_once __read_mostly; \
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if (!__print_once) { \
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__print_once = true; \
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DRM_DEV_INFO(dev, fmt, ##__VA_ARGS__); \
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} \
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})
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/**
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* DRM_DEV_DEBUG() - Debug output for generic drm code
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*
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* @dev: device pointer
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* @fmt: printf() like format string.
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*/
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#define DRM_DEV_DEBUG(dev, fmt, ...) \
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drm_dev_dbg(dev, DRM_UT_CORE, fmt, ##__VA_ARGS__)
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/**
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* DRM_DEV_DEBUG_DRIVER() - Debug output for vendor specific part of the driver
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*
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* @dev: device pointer
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* @fmt: printf() like format string.
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*/
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#define DRM_DEV_DEBUG_DRIVER(dev, fmt, ...) \
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drm_dev_dbg(dev, DRM_UT_DRIVER, fmt, ##__VA_ARGS__)
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/**
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* DRM_DEV_DEBUG_KMS() - Debug output for modesetting code
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*
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* @dev: device pointer
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* @fmt: printf() like format string.
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*/
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#define DRM_DEV_DEBUG_KMS(dev, fmt, ...) \
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drm_dev_dbg(dev, DRM_UT_KMS, fmt, ##__VA_ARGS__)
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/*
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* struct drm_device based logging
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*
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* Prefer drm_device based logging over device or prink based logging.
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*/
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/* Helper for struct drm_device based logging. */
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#define __drm_printk(drm, level, type, fmt, ...) \
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dev_##level##type((drm)->dev, "[drm] " fmt, ##__VA_ARGS__)
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#define drm_info(drm, fmt, ...) \
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__drm_printk((drm), info,, fmt, ##__VA_ARGS__)
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#define drm_notice(drm, fmt, ...) \
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__drm_printk((drm), notice,, fmt, ##__VA_ARGS__)
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#define drm_warn(drm, fmt, ...) \
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__drm_printk((drm), warn,, fmt, ##__VA_ARGS__)
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#define drm_err(drm, fmt, ...) \
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__drm_printk((drm), err,, "*ERROR* " fmt, ##__VA_ARGS__)
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#define drm_info_once(drm, fmt, ...) \
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__drm_printk((drm), info, _once, fmt, ##__VA_ARGS__)
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#define drm_notice_once(drm, fmt, ...) \
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__drm_printk((drm), notice, _once, fmt, ##__VA_ARGS__)
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#define drm_warn_once(drm, fmt, ...) \
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__drm_printk((drm), warn, _once, fmt, ##__VA_ARGS__)
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#define drm_err_once(drm, fmt, ...) \
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__drm_printk((drm), err, _once, "*ERROR* " fmt, ##__VA_ARGS__)
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#define drm_err_ratelimited(drm, fmt, ...) \
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__drm_printk((drm), err, _ratelimited, "*ERROR* " fmt, ##__VA_ARGS__)
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#define drm_dbg_core(drm, fmt, ...) \
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drm_dev_dbg((drm) ? (drm)->dev : NULL, DRM_UT_CORE, fmt, ##__VA_ARGS__)
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#define drm_dbg(drm, fmt, ...) \
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drm_dev_dbg((drm) ? (drm)->dev : NULL, DRM_UT_DRIVER, fmt, ##__VA_ARGS__)
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#define drm_dbg_kms(drm, fmt, ...) \
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drm_dev_dbg((drm) ? (drm)->dev : NULL, DRM_UT_KMS, fmt, ##__VA_ARGS__)
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#define drm_dbg_prime(drm, fmt, ...) \
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drm_dev_dbg((drm) ? (drm)->dev : NULL, DRM_UT_PRIME, fmt, ##__VA_ARGS__)
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#define drm_dbg_atomic(drm, fmt, ...) \
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drm_dev_dbg((drm) ? (drm)->dev : NULL, DRM_UT_ATOMIC, fmt, ##__VA_ARGS__)
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#define drm_dbg_vbl(drm, fmt, ...) \
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drm_dev_dbg((drm) ? (drm)->dev : NULL, DRM_UT_VBL, fmt, ##__VA_ARGS__)
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#define drm_dbg_state(drm, fmt, ...) \
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drm_dev_dbg((drm) ? (drm)->dev : NULL, DRM_UT_STATE, fmt, ##__VA_ARGS__)
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#define drm_dbg_lease(drm, fmt, ...) \
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drm_dev_dbg((drm) ? (drm)->dev : NULL, DRM_UT_LEASE, fmt, ##__VA_ARGS__)
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#define drm_dbg_dp(drm, fmt, ...) \
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drm_dev_dbg((drm) ? (drm)->dev : NULL, DRM_UT_DP, fmt, ##__VA_ARGS__)
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#define drm_dbg_drmres(drm, fmt, ...) \
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drm_dev_dbg((drm) ? (drm)->dev : NULL, DRM_UT_DRMRES, fmt, ##__VA_ARGS__)
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/*
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* printk based logging
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*
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* Prefer drm_device based logging over device or prink based logging.
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*/
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__printf(2, 3)
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void __drm_dbg(enum drm_debug_category category, const char *format, ...);
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__printf(1, 2)
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void __drm_err(const char *format, ...);
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/* Macros to make printk easier */
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#define _DRM_PRINTK(once, level, fmt, ...) \
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printk##once(KERN_##level "[" DRM_NAME "] " fmt, ##__VA_ARGS__)
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#define DRM_INFO(fmt, ...) \
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_DRM_PRINTK(, INFO, fmt, ##__VA_ARGS__)
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#define DRM_NOTE(fmt, ...) \
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_DRM_PRINTK(, NOTICE, fmt, ##__VA_ARGS__)
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#define DRM_WARN(fmt, ...) \
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_DRM_PRINTK(, WARNING, fmt, ##__VA_ARGS__)
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#define DRM_INFO_ONCE(fmt, ...) \
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_DRM_PRINTK(_once, INFO, fmt, ##__VA_ARGS__)
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#define DRM_NOTE_ONCE(fmt, ...) \
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_DRM_PRINTK(_once, NOTICE, fmt, ##__VA_ARGS__)
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#define DRM_WARN_ONCE(fmt, ...) \
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_DRM_PRINTK(_once, WARNING, fmt, ##__VA_ARGS__)
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#define DRM_ERROR(fmt, ...) \
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__drm_err(fmt, ##__VA_ARGS__)
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#define DRM_ERROR_RATELIMITED(fmt, ...) \
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DRM_DEV_ERROR_RATELIMITED(NULL, fmt, ##__VA_ARGS__)
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#define DRM_DEBUG(fmt, ...) \
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__drm_dbg(DRM_UT_CORE, fmt, ##__VA_ARGS__)
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#define DRM_DEBUG_DRIVER(fmt, ...) \
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__drm_dbg(DRM_UT_DRIVER, fmt, ##__VA_ARGS__)
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#define DRM_DEBUG_KMS(fmt, ...) \
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__drm_dbg(DRM_UT_KMS, fmt, ##__VA_ARGS__)
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#define DRM_DEBUG_PRIME(fmt, ...) \
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__drm_dbg(DRM_UT_PRIME, fmt, ##__VA_ARGS__)
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#define DRM_DEBUG_ATOMIC(fmt, ...) \
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__drm_dbg(DRM_UT_ATOMIC, fmt, ##__VA_ARGS__)
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#define DRM_DEBUG_VBL(fmt, ...) \
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__drm_dbg(DRM_UT_VBL, fmt, ##__VA_ARGS__)
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#define DRM_DEBUG_LEASE(fmt, ...) \
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__drm_dbg(DRM_UT_LEASE, fmt, ##__VA_ARGS__)
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#define DRM_DEBUG_DP(fmt, ...) \
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__drm_dbg(DRM_UT_DP, fmt, ## __VA_ARGS__)
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#define __DRM_DEFINE_DBG_RATELIMITED(category, drm, fmt, ...) \
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({ \
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static DEFINE_RATELIMIT_STATE(rs_, DEFAULT_RATELIMIT_INTERVAL, DEFAULT_RATELIMIT_BURST);\
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const struct drm_device *drm_ = (drm); \
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\
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if (drm_debug_enabled(DRM_UT_ ## category) && __ratelimit(&rs_)) \
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drm_dev_printk(drm_ ? drm_->dev : NULL, KERN_DEBUG, fmt, ## __VA_ARGS__); \
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})
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#define drm_dbg_kms_ratelimited(drm, fmt, ...) \
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__DRM_DEFINE_DBG_RATELIMITED(KMS, drm, fmt, ## __VA_ARGS__)
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#define DRM_DEBUG_KMS_RATELIMITED(fmt, ...) drm_dbg_kms_ratelimited(NULL, fmt, ## __VA_ARGS__)
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/*
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* struct drm_device based WARNs
|
|
*
|
|
* drm_WARN*() acts like WARN*(), but with the key difference of
|
|
* using device specific information so that we know from which device
|
|
* warning is originating from.
|
|
*
|
|
* Prefer drm_device based drm_WARN* over regular WARN*
|
|
*/
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|
|
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/* Helper for struct drm_device based WARNs */
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|
#define drm_WARN(drm, condition, format, arg...) \
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WARN(condition, "%s %s: " format, \
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|
dev_driver_string((drm)->dev), \
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|
dev_name((drm)->dev), ## arg)
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|
|
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#define drm_WARN_ONCE(drm, condition, format, arg...) \
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|
WARN_ONCE(condition, "%s %s: " format, \
|
|
dev_driver_string((drm)->dev), \
|
|
dev_name((drm)->dev), ## arg)
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|
|
|
#define drm_WARN_ON(drm, x) \
|
|
drm_WARN((drm), (x), "%s", \
|
|
"drm_WARN_ON(" __stringify(x) ")")
|
|
|
|
#define drm_WARN_ON_ONCE(drm, x) \
|
|
drm_WARN_ONCE((drm), (x), "%s", \
|
|
"drm_WARN_ON_ONCE(" __stringify(x) ")")
|
|
|
|
#endif /* DRM_PRINT_H_ */
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