Allow boards and architectures to override the default environment lookup
code by overriding env_get_location.
Reviewed-by: Andre Przywara <andre.przywara@arm.com>
Reviewed-by: Lukasz Majewski <lukma@denx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Since we want to have multiple environments, we will need to initialise
all the environments since we don't know at init time what drivers might
fail when calling load.
Let's init all of them, and only consider for further operations the ones
that have not reported any errors at init time.
Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Now that we have everything in place to support multiple environment, let's
make sure the current code can use it.
The priority used between the various environment is the same one that was
used in the code previously.
At read / init times, the highest priority environment is going to be
detected, and we'll use the same one without lookup during writes. This
should implement the same behaviour than we currently have.
Reviewed-by: Andre Przywara <andre.przywara@arm.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Since we can have multiple environments now, it's better to provide a
decent indication on what environments were tried and which were the one to
fail and succeed.
Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Since we'll soon have support for multiple environments, the environment
saving message might end up being printed multiple times if the higher
priority environment cannot be used.
That might confuse the user, so let's make it explicit if the operation
failed or not.
Reviewed-by: Andre Przywara <andre.przywara@arm.com>
Reviewed-by: Lukasz Majewski <lukma@denx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
In preparation for the multiple environment support, let's introduce two
new parameters to the environment driver lookup function: the priority and
operation.
The operation parameter is meant to identify, obviously, the operation you
might want to perform on the environment.
The priority is a number passed to identify the environment priority you
want to retrieve. The lowest priority parameter (0) will be the primary
source.
Combining the two parameters allow you to support multiple environments
through different priorities, and to change those priorities between read
and writes operations.
This is especially useful to implement migration mechanisms where you want
to always use the same environment first, be it to read or write, while the
common case is more likely to use the same environment it has read from to
write it to.
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
The env_driver_lookup_default and env_get_default_location functions are
about to get refactored to support loading from multiple environment.
The name is therefore not really well suited anymore. Drop the default
part to be a bit more relevant.
Reviewed-by: Andre Przywara <andre.przywara@arm.com>
Reviewed-by: Lukasz Majewski <lukma@denx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
The nvedit command is the only user of env_driver_lookup_default outside of
the environment code itself, and it uses it only to print the environment
it's about to save to during env save.
As we're about to rework the environment to be able to handle multiple
environment sources, we might not have an idea of what environment backend
is going to be used before trying (and possibly failing for some).
Therefore, it makes sense to remove that message and move it to the
env_save function itself. As a side effect, we also can get rid of the call
to env_driver_lookup_default that is also about to get refactored.
Reviewed-by: Andre Przywara <andre.przywara@arm.com>
Reviewed-by: Lukasz Majewski <lukma@denx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
For example to store the environment in a file named "/uboot.env" in MMC
"0", where partition "1" contains the EXT4 filesystem, the following
configs should be added to the board's default config:
CONFIG_ENV_IS_IN_EXT4=y
CONFIG_ENV_EXT4_DEVICE_AND_PART="0:1"
CONFIG_ENV_EXT4_FILE="/uboot.env"
CONFIG_ENV_EXT4_INTERFACE="mmc"
Signed-off-by: Jorge Ramirez-Ortiz <jorge.ramirez-ortiz@linaro.org>
[trini: Fix some line over 80 chars issues]
Signed-off-by: Tom Rini <trini@konsulko.com>
Last user of this option went away in commit:
fdc7718999 ("board: usb_a9263: Update to support DT and DM")
Signed-off-by: Tuomas Tynkkynen <tuomas.tynkkynen@iki.fi>
With the change to the environment code to remove the common init stage
of pointing to the default environment and setting it as valid, combined
with the change to switch gd->env_valid from 0/1/2 to an enum we now
must set env_valid to one of the enum values rather than an int. And in
this case, not only was setting it to an int wrong, it was now the wrong
value. Finally, in the case of ENV_IS_NOWHERE we must still say that
our envionrment is invalid after init for things to continue to
function.
Fixes: 7938822a6b ("env: Drop common init() functions")
Tested-by: Marek Vasut <marek.vasut@gmail.com>
Reported-by: Marek Vasut <marek.vasut@gmail.com>
Reported-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Tom Rini <trini@konsulko.com>
---
Changes in v3:
- Actually include changes for env/nowhere.c
Use the env_save() function directly now that there is only one
implementation of saveenv().
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Wolfgang Denk <wd@denx.de>
Reviewed-by: Tom Rini <trini@konsulko.com>
This is a strange name for a function that loads the environment. There is
now only one implementation of this function, so use the new env_load()
function directly instead.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Tom Rini <trini@konsulko.com>
We only have a single implementation of this function now and it is called
env_get_char(). Drop the old function and the weak version.
Reviewed-by: Tom Rini <trini@konsulko.com>
Signed-off-by: Simon Glass <sjg@chromium.org>
Now that env_init() is only defined once we can drop the env_init_new()
name and just use env_init().
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Tom Rini <trini@konsulko.com>
Add a name to the driver and use that instead of the global variable
declared by each driver.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Tom Rini <trini@konsulko.com>
Most of the init() implementations just use the default environment.
Adjust env_init_new() to do this automatically, and drop the redundant
code.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Tom Rini <trini@konsulko.com>
Move over to use a the master implementation of the location drivers, with
each method calling out to the appropriate driver.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Tom Rini <trini@konsulko.com>
We plan to move to a environment access via drivers for each location
where the environment can be stored. Add an implementation for this. So
far it is not used, but will be pressed into service in a future patch.
Signed-off-by: Simon Glass <sjg@chromium.org>
