sysfs_show was incorrectly extracting the sysfs_attribute_type from the
gasket_sysfs_attribute. This prevented dispatch from working properly.
Signed-off-by: Nick Ewalt <nicholasewalt@google.com>
Signed-off-by: Todd Poynor <toddpoynor@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Array cm_mappable_regions is defined but is never used hence it is
redundant and can be removed.
Cleans up clang warning:
warning: 'cm_mappable_regions' defined but not used [-Wunused-const-variable=]
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The apex device is left out of reset mode at the end of device
probe/initialize processing. Add a call to enter reset at the end of
the sequence, triggering power gating and other low power features.
Signed-off-by: Todd Poynor <toddpoynor@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The gasket framework no longer provides callbacks to the device driver
for sysfs setup and teardown. Move the sysfs setup code to the device
probe function. Apex does not implement sysfs cleanup code.
Signed-off-by: Todd Poynor <toddpoynor@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Gasket device drivers are now in charge of the device add and remove
sequences; the framework callbacks for these are deleted. Move the
apex device add callback code to the probe function. Apex did not
implement the removal callback.
Signed-off-by: Todd Poynor <toddpoynor@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Gasket framework now places device drivers in charge of calling APIs to
enable and disable gasket device operations. Make the appropriate calls
from the apex driver.
Signed-off-by: Todd Poynor <toddpoynor@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
These are not implemented for apex, and are now being removed from the
gasket framework.
Signed-off-by: Todd Poynor <toddpoynor@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Apex driver moves PCI core calls like probe, enable, and remove from
gasket to apex. Call new functions in gasket to register apex as a PCI
device to the gasket framework.
Signed-off-by: Todd Poynor <toddpoynor@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Set default value of allow_power_save parameter to enable power save
mode, which is expected to be the state usually desired.
Signed-off-by: Marty Faltesek <mfaltesek@google.com>
Signed-off-by: Todd Poynor <toddpoynor@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Apex doesn't implement different types of resets based on the reset type
param passed through the gasket layer or from userspace via the
gasket_reset ioctl. The reset type is dropped from the gasket framework
in a previous patch due to a lack of present need and non-conforming use
of this parameter by the framework. Drop the parameter from the apex
driver as well.
Signed-off-by: Todd Poynor <toddpoynor@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
apex.h is supposed to contain kernel-userspace interface definitions,
but has a number of defines that are only used by apex_driver.c or are
not used at all. Move driver implementation defines not shared with
userspace to the driver source. Remove unused defines.
Signed-off-by: Todd Poynor <toddpoynor@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Fix multi-line alignment formatting to look like:
int ret = long_function_name(device, VARIABLE1, VARIABLE2,
VARIABLE3, VARIABLE4);
Many of these TODO items were previously cleaned up during the conversion
to standard logging functions.
Signed-off-by: Todd Poynor <toddpoynor@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Static functions don't need kernel doc formatting, can be simplified.
Reformat comments that can be single-line. Remove extraneous text.
Signed-off-by: Todd Poynor <toddpoynor@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Apex chips with class 0 (PCI_CLASS_NOT_DEFINED) fixed up to
PCI_CLASS_SYSTEM_OTHER to enable PCI resource assignments.
Signed-off-by: Todd Poynor <toddpoynor@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Drop gasket logging calls in favor of standard logging.
Signed-off-by: Todd Poynor <toddpoynor@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Debugging information is improperly logged at non-debug log level in a
number of places, and some logs regarding error conditions may be
generated too frequently, such that these could cause performance
problems and/or obscure other logs. Convert these to debug log level.
Signed-off-by: Zhongze Hu <frankhu@chromium.org>
Signed-off-by: Todd Poynor <toddpoynor@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Apex sysfs show function return -ENODEV if the attribute is not present,
rather than silently failing from the standpoint of the userspace
accessor.
Reported-by: Guenter Roeck <groeck@chromium.org>
Signed-off-by: Todd Poynor <toddpoynor@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Always allow root to open device for writing.
Drop special-casing of ioctl permissions for root vs. owner.
Convert to bool types as appropriate.
Reported-by: Dmitry Torokhov <dtor@chromium.org>
Signed-off-by: Zhongze Hu <frankhu@chromium.org>
Signed-off-by: Todd Poynor <toddpoynor@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Collapse together two checks and return immediately, avoid conditional
indentation for most of function code.
Reported-by: Guenter Roeck <groeck@chromium.org>
Signed-off-by: Simon Que <sque@chromium.org>
Signed-off-by: Todd Poynor <toddpoynor@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Changed logging statements to use %s and __func__ instead of hard coding
the function name in a string.
Signed-off-by: Felix Siegel <felix.siegel@posteo.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Remove log messages that solely print the function's name
everytime it is called.
Signed-off-by: Felix Siegel <felix.siegel@posteo.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Now that the SPDX tag is in all gasket files, that identifies the
license in a specific and legally-defined manner. So the extra GPL text
wording can be removed as it is no longer needed at all.
This is done on a quest to remove the 700+ different ways that files in
the kernel describe the GPL license text. And there's unneeded stuff
like the address (sometimes incorrect) for the FSF which is never
needed.
Cc: Rob Springer <rspringer@google.com>
Cc: John Joseph <jnjoseph@google.com>
Cc: Ben Chan <benchan@chromium.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
It's good to have SPDX identifiers in all files to make it easier to
audit the kernel tree for correct licenses.
Fix up the all of the staging gasket files to have a proper SPDX
identifier, based on the license text in the file itself. The SPDX
identifier is a legally binding shorthand, which can be used instead of
the full boiler plate text.
Cc: Rob Springer <rspringer@google.com>
Cc: John Joseph <jnjoseph@google.com>
Cc: Ben Chan <benchan@chromium.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The Gasket (Google ASIC Software, Kernel Extensions, and Tools) kernel
framework is a generic, flexible system that supports thin kernel
drivers. Gasket kernel drivers are expected to handle opening and
closing devices, mmap'ing BAR space as requested, a small selection of
ioctls, and handling page table translation (covered below). Any other
functions should be handled by userspace code.
The Gasket common module is not enough to run a device. In order to
customize the Gasket code for a given piece of hardware, a device
specific module must be created. At a minimum, this module must define a
struct gasket_driver_desc containing the device-specific data for use by
the framework; in addition, the module must declare an __init function
that calls gasket_register_device with the module's gasket_driver_desc
struct. Finally, the driver must define an exit function that calls
gasket_unregister_device with the module's gasket_driver_desc struct.
One of the core assumptions of the Gasket framework is that precisely
one process is allowed to have an open write handle to the device node
at any given time. (That process may, once it has one write handle, open
any number of additional write handles.) This is accomplished by
tracking open and close data for each driver instance.
Signed-off-by: Rob Springer <rspringer@google.com>
Signed-off-by: John Joseph <jnjoseph@google.com>
Signed-off-by: Simon Que <sque@chromium.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
