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Author SHA1 Message Date
Heinrich Schuchardt
2496796587 log: provide missing macros
With commit d094a0734c ("log: allow for message continuation") we have
defined a special log level and category for message continuation. Let's
have a macro for using these.

If logging is enabled log_cont() will create a continuation log output with
the same logging level and category as the previous message.

If logging is not enabled, log_cont() will print like printf().

Provide macros for logging levels LOG_EMERG, LOG_ALERT, LOG_CRIT.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
2021-01-16 19:17:11 -05:00
Heinrich Schuchardt
5176365a6b log: make debug_cond() function like
Change debug_cond() such that it can be used instead of a function like
debug().

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
2021-01-16 19:17:11 -05:00
Heinrich Schuchardt
9e925d0c47 log: typos in include/log.h
Correct several typos.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
2020-12-02 16:21:58 -05:00
Simon Glass
d61e784136 log: Fix comment for LOGC_BOOT
This comment is in the wrong format, so reports an error with
'make htmldocs'. Fix it.

Fixes: b73d61a556 ("x86: zimage: Add a little more logging")
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
2020-12-02 16:21:58 -05:00
Simon Glass
b73d61a556 x86: zimage: Add a little more logging
Add logging for each part of the boot process, using a new

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Igor Opaniuk <igor.opaniuk@toradex.com>
2020-11-06 09:51:34 +08:00
Sean Anderson
00ebb7feb7 doc: Add log kerneldocs to documentation
The functions in log.h are already mostly documented, so add them to the
generated documentation.

Signed-off-by: Sean Anderson <seanga2@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
2020-10-30 10:58:07 -04:00
Sean Anderson
1c593a105a cmd: log: Add commands to list categories and drivers
This allows users to query which categories and drivers are available on
their system. This allows them to construct filter-add commands without
(e.g.) adjusting the log format to show categories and drivers.

Signed-off-by: Sean Anderson <seanga2@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
2020-10-30 10:56:10 -04:00
Sean Anderson
40455a6915 log: Add filter flag to match greater than a log level
This is the complement of the existing behavior to match only messages with
a log level less than a threshold. This is primarily useful in conjunction
with LOGFF_DENY.

Signed-off-by: Sean Anderson <seanga2@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
2020-10-30 10:55:26 -04:00
Sean Anderson
fe3b1a2d21 log: Add filter flag to deny on match
Without this flag, log filters can only explicitly accept messages.
Allowing denial makes it easier to filter certain subsystems. Unlike
allow-ing filters, deny-ing filters are added to the beginning of the
filter list. This should do the Right Thing most of the time, but it's
less-universal than allowing filters to be inserted anywhere. If this
becomes a problem, then perhaps log_filter_add* should take a filter number
to insert before/after.

Signed-off-by: Sean Anderson <seanga2@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
2020-10-30 10:55:26 -04:00
Sean Anderson
a02f84ee9c log: Add function to create a filter with flags
This function exposes a way to specify flags when creating a filter.

Signed-off-by: Sean Anderson <seanga2@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
2020-10-30 10:55:26 -04:00
Sean Anderson
3102c1d2c2 log: Expose some helper functions
These functions are required by "cmd: log: Add commands to manipulate
filters" and "test: Add a test for log filter-*".

Signed-off-by: Sean Anderson <seanga2@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
2020-10-30 10:55:26 -04:00
Sean Anderson
b66a924f97 log: Fix incorrect documentation of log_filter.cat_list
Logging category lists are terminated by LOGC_END, not LOGC_NONE.

Fixes: e9c8d49d54 ("log: Add an implementation of logging")

Signed-off-by: Sean Anderson <seanga2@gmail.com>
Reviewed-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
2020-10-30 10:54:38 -04:00
Heinrich Schuchardt
d094a0734c log: allow for message continuation
Some drivers use macro pr_cont() for continuing a message sent via printk.
Hence if we want to convert printk messaging to using the logging system,
we must support continuation of log messages too.

As pr_cont() does not provide a message level we need a means of
remembering the last log level.

With the patch a pseudo log level LOGL_CONT as well as a pseudo log
category LOGC_CONT are introduced. Using these results in the application
of the same log level and category as in the previous log message.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
2020-10-27 13:50:53 -04:00
Simon Glass
8021296a71 log: Add missing category names
Add some category names that were missed in recent changes. Update the
comment as a reminder.

Signed-off-by: Simon Glass <sjg@chromium.org>
2020-10-22 09:53:31 -04:00
Simon Glass
3d03ab6361 log: Add a way to enable/disable a log device
At present all log devices are enabled by default. Add a function to allow
devices to be disabled or enabled at runtime.

Signed-off-by: Simon Glass <sjg@chromium.org>
2020-10-10 16:50:11 -04:00
Simon Glass
b45203004e log: Add a flag to enable log drivers
At present there is no way to disable a log driver. But the syslog driver
causes (attempted) network traffic in sandbox every time a log message
is printed, which is often.

Add a flag to enable a log driver. Adjust struct log_device to use a short
for next_filter_num so that no more memory is used for devices. Also fix
a missing line in the struct log_driver comment while here.

To maintain compatibility, enable it for all drivers for now.

Signed-off-by: Simon Glass <sjg@chromium.org>
2020-10-10 16:50:11 -04:00
Simon Glass
52d3df7fef log: Allow LOG_DEBUG to always enable log output
At present if CONFIG_LOG enabled, putting LOG_DEBUG at the top of a file
(before log.h inclusion) causes _log() to be executed for every log()
call, regardless of the build- or run-time logging level.

However there is no guarantee that the log record will actually be
displayed. If the current log level is lower than LOGL_DEBUG then it will
not be.

Add a way to signal that the log record should always be displayed and
update log_passes_filters() to handle this.

With the new behaviour, log_debug() will always log if LOG_DEBUG is
enabled.

Move log_test_syslog_nodebug() into its own file since it cannot be made
to work where it is, with LOG_DEBUG defined.

Signed-off-by: Simon Glass <sjg@chromium.org>
2020-10-10 16:49:58 -04:00
Heinrich Schuchardt
3c21d7738a log: don't show function by default
The name of the function emitting a log message may be of interest for a
developer but is distracting for normal users. See the example below:

    try_load_entry() Booting: Debian

Make the default format for log messages customizable. By default show
only the message text.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
2020-07-09 18:57:22 -06:00
Simon Glass
0914011310 command: Remove the cmd_tbl_t typedef
We should not use typedefs in U-Boot. They cannot be used as forward
declarations which means that header files must include the full header to
access them.

Drop the typedef and rename the struct to remove the _s suffix which is
now not useful.

This requires quite a few header-file additions.

Signed-off-by: Simon Glass <sjg@chromium.org>
2020-05-18 18:36:55 -04:00
Simon Glass
90526e9fba common: Drop net.h from common header
Move this header out of the common header. Network support is used in
quite a few places but it still does not warrant blanket inclusion.

Note that this net.h header itself has quite a lot in it. It could be
split into the driver-mode support, functions, structures, checksumming,
etc.

Signed-off-by: Simon Glass <sjg@chromium.org>
2020-05-18 17:33:31 -04:00
Tom Rini
f51b4bcf61 Functions for reading indexed values from device tree
Enhancements to 'dm' command
 Log test enhancements and syslog driver
 DM change to read parent ofdata before children
 Minor fixes
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Merge tag 'dm-pull-10apr20-take2' of git://git.denx.de/u-boot-dm

Functions for reading indexed values from device tree
Enhancements to 'dm' command
Log test enhancements and syslog driver
DM change to read parent ofdata before children
Minor fixes
2020-04-16 13:45:03 -04:00
Heinrich Schuchardt
20fd256deb log: output for CONFIG_LOG=n
If CONFIG_LOG=n, we should still output errors, warnings, notices, infos,
and for DEBUG=1 also debug messages.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
2020-04-16 08:07:58 -06:00
Simon Glass
7ca2850cbc dm: core: Add basic ACPI support
ACPI (Advanced Configuration and Power Interface) is a standard for
specifying information about a platform. It is a little like device
tree but the bindings are part of the specification and it supports an
interpreted bytecode language.

Driver model does not use ACPI for U-Boot's configuration, but it is
convenient to have it support generation of ACPI tables for passing to
Linux, etc.

As a starting point, add an optional set of ACPI operations to each
device. Initially only a single operation is available, to obtain the
ACPI name for the device. More operations are added later.

Enable ACPI for sandbox to ensure build coverage and so that we can add
tests.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Wolfgang Wallner <wolfgang.wallner@br-automation.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
2020-04-16 14:36:28 +08:00
Sean Anderson
aaa05deb12 log: Include missing header for log.h
log.h references cmd_tbl_t but command.h was not included

Signed-off-by: Sean Anderson <seanga2@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
2020-01-07 16:03:01 -07:00
Simon Glass
cce61fc428 dm: devres: Convert to use logging
At present when CONFIG_DEBUG_DEVRES is enabled, U-Boot prints log messages
to the console with every devres allocation/free event. This causes most
tests to fail since the console output is not as expected.

In particular this prevents us from adding a device to sandbox which uses
devres in its bind method.

Move devres over to use U-Boot's logging feature instead, and add a new
category for devres.

Signed-off-by: Simon Glass <sjg@chromium.org>
2020-01-07 16:02:38 -07:00
Simon Glass
cd01d2d595 common: Add a noisy assert()
Some U-Boot code uses BUG_ON() and WARN_ON() macros. These use __FILE__
which can include quite a large path, depending on how U-Boot is built.

The existing assert() is only checked if DEBUG is enabled. Add a new one
which is always checked, and prints a (smaller) error in that case.

Signed-off-by: Simon Glass <sjg@chromium.org>
2020-01-07 16:02:38 -07:00
Simon Glass
fd42948fc9 log: Add log_nop() to avoid unused-variable warnings
If a log statement includes a variable and logging is disabled, this can
generate warnings about unused variables. Add a bit more complexity to the
macros to avoid this for the common case.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
2019-10-08 13:57:44 +08:00
Heinrich Schuchardt
b236f8c086 log: document the assign() macro
Provide a concise description of the assert() macro. Point out that the
tested expression is always executed, irrespective of the value of _DEBUG.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
2019-08-07 15:31:02 -04:00
Simon Glass
f9811e8575 log: Allow #define LOG_DEBUG to enable logging in a file
At present it is possible to '#define DEBUG' at the top of a file which
causes all debug() statements in that file to become active. There is
currently no equivalent with logging, but this is a useful function.

Add a LOG_DEBUG define along with documentation.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
2019-02-20 15:21:44 +08:00
Simon Glass
6fc7e93896 log: Fix up Kconfig log level names
The log level numbers in the Kconfig are not actually correct. Fix them
and also add a missing space in the header-file comment.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
2019-02-20 15:21:44 +08:00
Simon Glass
ed4e933d13 log: Check printf() arguments
At present logging does not check printf() arguments. Now that all users
have been corrected, enable this to prevent further problems.

Signed-off-by: Simon Glass <sjg@chromium.org>
2019-01-14 17:47:13 -07:00
Simon Glass
7cbd2d2e32 malloc_simple: Add logging of allocations
It is sometimes useful to see what memory is being allocated early during
boot. Add logging to support this, using a new LOGC_ALLOC category.

Signed-off-by: Simon Glass <sjg@chromium.org>
2018-11-29 09:30:05 -07:00
Simon Glass
9f407d4ef0 Add core support for a bloblist to convey data from SPL
At present there is no standard way in U-Boot to pass information from SPL
to U-Boot proper. But sometimes SPL wants to convey information to U-Boot
that U-Boot cannot easily figure out. For example, if SPL sets up SDRAM
then it might want to pass the size of SDRAM, or the location of each
bank, to U-Boot proper.

Add a new 'bloblist' feature which provides this. A bloblist is set up in
the first phase of U-Boot that runs (i.e. TPL or SPL). The location of
this info may be in SRAM or CAR (x86 cache-as-RAM) or somewhere else.

Information placed in this region is preserved (with a checksum) through
TPL and SPL and ends up in U-Boot. At this point it is copied into SDRAM
so it can be used after relocation.

Reviewed-by: Tom Rini <trini@konsulko.com>
Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: Andreas Dannenberg <dannenberg@ti.com>
2018-11-26 08:25:32 -05:00
Simon Glass
4d8d3056f8 spl: Add support for logging in SPL and TPL
It is sometimes useful to log information in SPL and TPL. Add support for
this.

Reviewed-by: Tom Rini <trini@konsulko.com>
Signed-off-by: Simon Glass <sjg@chromium.org>
2018-11-26 08:25:32 -05:00
Simon Glass
a5c13b68e7 sandbox: log: Add a category for sandbox
It seems useful to make sandbox its own log category since it is used for
so much testing. Add this as a new category.

Signed-off-by: Simon Glass <sjg@chromium.org>
2018-11-20 19:14:22 -07:00
Simon Glass
0bf964592a log: Add comments to the rest of the log categories
At present some of the log categories are missing comments. Add them.

Signed-off-by: Simon Glass <sjg@chromium.org>
2018-10-09 04:40:27 -06:00
Simon Glass
c3aed5db59 sandbox: spi: Add more logging
Add logging to aid debugging features in these drivers. Also drop some
code in sandbox_spi_xfer() which is not used.

Signed-off-by: Simon Glass <sjg@chromium.org>
2018-10-09 04:40:27 -06:00
Simon Glass
cdd140af5c log: Add helpers for common log levels
At present to output a log message you need something like:

   log(UCLASS_SPI, LOCL_INFO, "message1");
   log(UCLASS_SPI, LOCL_INFO, "message2");

but many files use the same category throughout. Also it is helpful to
shorten the length of log names, providing helpers for common logging
levels. Add some macros so that it is possible to do:

   (top of file, before #includes)
   #define LOG_CATEGORY UCLASS_SPI

   (later in the file)
   log_info("message1");
   log_debug("message2");
   log_err("message3");

Signed-off-by: Simon Glass <sjg@chromium.org>
2018-10-09 04:40:26 -06:00
Simon Glass
fbcf37e48e log: Correct definition of log_msg_ret()
This macro should have two parameters, not one. Fix it so that it
correctly resolves to _ret when logging is disabled.

Signed-off-by: Simon Glass <sjg@chromium.org>
2018-10-08 08:30:22 -06:00
Simon Glass
b616cef97a log: Add a way to log a return value with a message
It is sometimes useful to show a message when logging an error return
value, perhaps to add a few details about the problem. Add a function to
support this.

Signed-off-by: Simon Glass <sjg@chromium.org>
2018-07-09 09:11:00 -06:00
Simon Glass
c2e4e7e631 log: Fix incorect range check in log_get_cat_name()
This allows access to an element after the end of the array. Fix it.

Reported-by: Coverity (CID: 173279)
Signed-off-by: Simon Glass <sjg@chromium.org>
2018-06-18 14:43:14 -04:00
Tom Rini
83d290c56f SPDX: Convert all of our single license tags to Linux Kernel style
When U-Boot started using SPDX tags we were among the early adopters and
there weren't a lot of other examples to borrow from.  So we picked the
area of the file that usually had a full license text and replaced it
with an appropriate SPDX-License-Identifier: entry.  Since then, the
Linux Kernel has adopted SPDX tags and they place it as the very first
line in a file (except where shebangs are used, then it's second line)
and with slightly different comment styles than us.

In part due to community overlap, in part due to better tag visibility
and in part for other minor reasons, switch over to that style.

This commit changes all instances where we have a single declared
license in the tag as both the before and after are identical in tag
contents.  There's also a few places where I found we did not have a tag
and have introduced one.

Signed-off-by: Tom Rini <trini@konsulko.com>
2018-05-07 09:34:12 -04:00
Heinrich Schuchardt
d8d8997bbc log: fix typo LOGL_EFI
According to the documentation the EFI log category is called LOGC_EFI.
All other categories start with LOGC_. So let's fix it.

Fixes: 1973b381a1 ("log: add category LOGC_EFI")
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Alexander Graf <agraf@suse.de>
2018-04-23 21:34:28 +02:00
Heinrich Schuchardt
1973b381a1 log: add category LOGC_EFI
The EFI implementation does not fit into any of the existing categories.

Provide LOGC_EFI so that EFI related message can be filtered.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
2018-02-03 10:09:28 -07:00
Simon Glass
3707c6ee0d log: Add a way to log error-return values
When functions return an error it propagates up the stack to the point
where it is reported. Often the error code provides enough information
about the root cause of the error that this is obvious what went wrong.

However in some cases the error may be hard to trace. For example if a
driver uses several devices to perform an operation, it may not be
obvious which one failed.

Add a log_ret() macro to help with this. This can be used to wrap any
error-return value. The logging system will then output a log record when
the original error is generated, making it easy to trace the call stack
of the error.

This macro can significantly impact code size, so its use is controlled
by a Kconfig option, which is enabled for sandbox.

Signed-off-by: Simon Glass <sjg@chromium.org>
2018-02-03 10:09:27 -07:00
Simon Glass
3b73e8d067 log: Add control over log formatting
It is useful to be able to control the output format of log records on the
console. As a starting point, add definitions for controlling which
elements of the log record are displayed. Use function and message as the
default, since these are the most useful fields.

Signed-off-by: Simon Glass <sjg@chromium.org>
2018-02-03 10:09:27 -07:00
Simon Glass
f941c8d76c log: Add functions to convert IDs to/from names
Category and level both use an enum for their ID values. Add functions to
convert these IDs to strings and vice versa. This will allow the log to
output the strings instead of the (inscrutable) values.

At the same time, add a new 'driver-model' category, to cover core
driver-model functions and fix an incorrect value for LOGL_MAX.

Tests will be added with the new 'log' subcommands.

Signed-off-by: Simon Glass <sjg@chromium.org>
(Updated to correct clang warnings)
2018-02-03 10:09:13 -07:00
Simon Glass
ef11ed8239 log: Add a test command
Add a command which exercises the logging system.

Signed-off-by: Simon Glass <sjg@chromium.org>
2017-12-07 15:17:00 -05:00
Simon Glass
e9c8d49d54 log: Add an implementation of logging
Add the logging header file and implementation with some configuration
options to control it.

Signed-off-by: Simon Glass <sjg@chromium.org>
2017-12-07 15:17:00 -05:00
Simon Glass
0e98b0a650 Move debug and logging support to a separate header
Before adding new features, move these definitions to a separate header
to avoid further cluttering common.h.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
2017-12-07 15:17:00 -05:00