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path: root/include/efi_loader.h
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2018-02-10efi_loader: correct efi_disk_registerHeinrich Schuchardt
efi_disk_register should return as status code (efi_status_t). Disks with zero blocks should be reported as 'not ready' without throwing an error. This patch solves a problem running OpenBSD on system configured with CONFIG_BLK=n (e.g. i.MX6). Reported-by: Jonathan Gray <jsg@jsg.id.au> Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de> Tested-by: Jonathan Gray <jsg@jsg.id.au> Signed-off-by: Alexander Graf <agraf@suse.de>
2018-02-10efi_driver: return type of efi_driver_init()Heinrich Schuchardt
Change the return type of efi_driver_init() to efi_status_t. efi_driver_init() calls efi_add_driver() which returns an efi_status_t value. efi_driver_init() should not subject this value to a conversion to int losing high bits on 64bit systems. Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de> Signed-off-by: Alexander Graf <agraf@suse.de>
2018-01-22efi_driver: EFI block driverHeinrich Schuchardt
This patch provides * a uclass for EFI drivers * a EFI driver for block devices For each EFI driver the uclass * creates a handle * adds the driver binding protocol The uclass provides the bind, start, and stop entry points for the driver binding protocol. In bind() and stop() it checks if the controller implements the protocol supported by the EFI driver. In the start() function it calls the bind() function of the EFI driver. In the stop() function it destroys the child controllers. The EFI block driver binds to controllers implementing the block io protocol. When the bind function of the EFI block driver is called it creates a new U-Boot block device. It installs child handles for all partitions and installs the simple file protocol on these. The read and write functions of the EFI block driver delegate calls to the controller that it is bound to. A usage example is as following: U-Boot loads the iPXE snp.efi executable. iPXE connects an iSCSI drive and exposes a handle with the block IO protocol. It calls ConnectController. Now the EFI block driver installs the partitions with the simple file protocol. iPXE uses the simple file protocol to load Grub or the Linux Kernel. Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de> [agraf: add comment on calloc len] Signed-off-by: Alexander Graf <agraf@suse.de>
2018-01-22efi_loader: add check_tpl parameter to efi_signal_eventHeinrich Schuchardt
In ExitBootServices we need to signal events irrespective of the current TPL level. A new parameter check_tpl is added to efi_signal_event(). Function efi_console_timer_notify() gets some comments. Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de> Signed-off-by: Alexander Graf <agraf@suse.de>
2018-01-22efi_loader: provide function to get last node of a device pathHeinrich Schuchardt
On a block device and its partitions the same protocols can be installed. To tell the apart we can use the type of the last node of the device path which is not the end node. The patch provides a utility function to find this last node. Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de> Signed-off-by: Alexander Graf <agraf@suse.de>
2018-01-22efi_loader: make efi_disk_create_partitions a global symbolHeinrich Schuchardt
Up to now we have been using efi_disk_create_partitions() to create partitions for block devices that existed before starting an EFI application. We need to call it for block devices created by EFI applications at run time. The EFI application will define the handle for the block device and install a device path protocol on it. We have to use this device path as stem for the partition device paths. Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de> Signed-off-by: Alexander Graf <agraf@suse.de>
2018-01-22efi_loader: provide a function to create a partition nodeHeinrich Schuchardt
Provide new function efi_dp_part_node() to create a device node for a partition. Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de> Signed-off-by: Alexander Graf <agraf@suse.de>
2018-01-22efi_loader: make efi_block_io_guid a global symbolHeinrich Schuchardt
The GUID of the EFI_BLOCK_IO_PROTOCOL is needed in different code parts. To avoid duplication make efi_block_io_guid a global symbol. Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de> Signed-off-by: Alexander Graf <agraf@suse.de>
2018-01-22efi_loader: return NULL from device path functionsHeinrich Schuchardt
For the construction of device paths we need to call the AllocatePool service. We should not ignore if it fails due to an out of memory situation. This patch changes the device path functions to return NULL if the memory allocation fails. Additional patches will be needed to fix the callers. Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de> Signed-off-by: Alexander Graf <agraf@suse.de>
2018-01-22efi_loader: consistently use efi_handle_t for handlesHeinrich Schuchardt
We should consistently use the efi_handle_t typedef when referring to handles. Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de> Reviewed-by: Simon Glass <sjg@chromium.org> Signed-off-by: Alexander Graf <agraf@suse.de>
2018-01-22efi_loader: implement ConnectControllerHeinrich Schuchardt
Implement the ConnectController boot service. A unit test is supplied in a subsequent patch. Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de> Signed-off-by: Alexander Graf <agraf@suse.de>
2018-01-22efi_loader: debug output installed device pathHeinrich Schuchardt
When a device path protocol is installed write the device path to the console in debug mode. For printing the new macro EFI_PRINT is used, which can be reused for future diagnostic output. Remove unused EFI_PRINT_GUID macro Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de> Signed-off-by: Alexander Graf <agraf@suse.de>
2018-01-22efi_loader: list of open protocol infosHeinrich Schuchardt
Add a list of open protocol infos to each protocol of a handle. Provide helper functions to access the list items. Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de> Signed-off-by: Alexander Graf <agraf@suse.de>
2017-12-16efi_loader: new function efi_delete_handle()Heinrich Schuchardt
Provide a function to remove a handle from the object list after removing all protocols. To avoid forward declarations other functions have to move up in the coding. Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de> Signed-off-by: Alexander Graf <agraf@suse.de>
2017-12-16efi_loader: return status from efi_setup_loaded_image()Heinrich Schuchardt
efi_setup_loaded_image() should return an error code indicating if an error has occurred. An error occurs if a protocol cannot be installed. Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de> Signed-off-by: Alexander Graf <agraf@suse.de>
2017-12-01efi_loader: helper function to add EFI object to listHeinrich Schuchardt
To avoid duplicate coding provide a helper function that initializes an EFI object and adds it to the EFI object list. efi_exit() is the only place where we dereference a handle to obtain a protocol interface. Add a comment to the function. Suggested-by: Alexander Graf <agraf@suse.de> Reviewed-by: Simon Glass <sjg@chromium.org> Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de> Signed-off-by: Alexander Graf <agraf@suse.de>
2017-12-01efi_loader: manage protocols in a linked listHeinrich Schuchardt
Reviewed-by: Simon Glass <sjg@chromium.org> Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de> Signed-off-by: Alexander Graf <agraf@suse.de>
2017-12-01efi_loader: efi_console: use helper functionsHeinrich Schuchardt
Use helper functions efi_created_handle and efi_add_protocol for creating the console handles and instaling the respective protocols. This change is needed if we want to move from an array of protocols to a linked list of protocols. Eliminate EFI_PROTOCOL_OBJECT which is not used anymore. Currently we have not defined protocol interfaces to be const. So efi_con_out and efi_console_control cannot be defined as const. Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de> Signed-off-by: Alexander Graf <agraf@suse.de>
2017-12-01efi_loader: helper functions for protocol managementHeinrich Schuchardt
This patch provides helper functions to manage protocols. efi_search_protocol - find a protocol on a handle efi_add_protocol - install a protocol on a handle efi_remove_protocol - remove a protocol from a handle efi_remove_all_protocols - remove all protocols from a handle Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de> Signed-off-by: Alexander Graf <agraf@suse.de>
2017-12-01efi_loader: argument of efi_search_obj should be constHeinrich Schuchardt
The argument of efi_search_obj is not changed so it should be marked as const. Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de> Signed-off-by: Alexander Graf <agraf@suse.de>
2017-12-01efi_loader: make efi_create_handle non-staticHeinrich Schuchardt
Export function efi_create_handle. Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de> Signed-off-by: Alexander Graf <agraf@suse.de>
2017-12-01efi_loader: efi_dp_match should have const argumentsHeinrich Schuchardt
efi_dp_match does not change its arguments. So they should be marked as const. Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de> Signed-off-by: Alexander Graf <agraf@suse.de>
2017-12-01efi_loader: rework efi_search_objHeinrich Schuchardt
EFI_HANDLEs are used both in boottime and in runtime services. efi_search_obj is a function that can be used to validate handles. So let's make it accessible via efi_loader.h. We can simplify the coding using list_for_each_entry. Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de> Signed-off-by: Alexander Graf <agraf@suse.de>
2017-12-01efi_loader: consistently use efi_uintn_t in boot servicesHeinrich Schuchardt
Consistenly use efi_uintn_t wherever the UEFI spec uses UINTN in boot services interfaces. Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de> Signed-off-by: Alexander Graf <agraf@suse.de>
2017-12-01efi_loader: replace UINTN by efi_uintn_tHeinrich Schuchardt
UINTN is used in the UEFI specification for unsigned integers matching the bitness of the CPU. Types in U-Boot should be lower case. The patch replaces it by efi_uintn_t. Suggested-by: Simon Glass <sjg@chromium.org> Suggested-by: Rob Clark <robdclark@gmail.com> Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de> Reviewed-by: Simon Glass <sjg@chromium.org> Signed-off-by: Alexander Graf <agraf@suse.de>
2017-12-01efi_loader: guard against double inclusion of efi_loader.hHeinrich Schuchardt
Use a define to detect double inclusion of efi_loader.h. Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de> Signed-off-by: Alexander Graf <agraf@suse.de>
2017-12-01efi_loader: implement SetWatchdogTimerHeinrich Schuchardt
The watchdog is initialized with a 5 minute timeout period. It can be reset by SetWatchdogTimer. It is stopped by ExitBoottimeServices. Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de> Signed-off-by: Alexander Graf <agraf@suse.de>
2017-10-12efi_loader: Add mem-mapped for fallbackRob Clark
When we don't have a real device/image path, such as 'bootefi hello', construct a mem-mapped device-path. This fixes 'bootefi hello' after devicepath refactoring. Fixes: 95c5553ea2 ("efi_loader: refactor boot device and loaded_image handling") Signed-off-by: Rob Clark <robdclark@gmail.com> Acked-by: Heinrich Schuchardt <xypron.glpk@gmx.de> Signed-off-by: Alexander Graf <agraf@suse.de>
2017-10-09efi_loader: use type bool for event statesHeinrich Schuchardt
Queued and signaled describe boolean states of events. So let's use type bool and rename the structure members to is_queued and is_signaled. Update the comments for is_queued and is_signaled. Reported-by: Simon Glass <sjg@chromium.org> Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de> Reviewed-by: Rob Clark <robdclark@gmail.com> Reviewed-by: Rob Clark <robdclark@gmail.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2017-10-05efi_loader: support 16 protocols per efi_objectHeinrich Schuchardt
8 protocols per efi_object is insufficient for iPXE. Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de> Reviewed-by: Simon Glass <sjg@chromium.org> Reviewed-by: Rob Clark <robdclark@gmail.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2017-09-20efi_loader: add bootmgrRob Clark
Similar to a "real" UEFI implementation, the bootmgr looks at the BootOrder and BootXXXX variables to try to find an EFI payload to load and boot. This is added as a sub-command of bootefi. The idea is that the distro bootcmd would first try loading a payload via the bootmgr, and then if that fails (ie. first boot or corrupted EFI variables) it would fallback to loading bootaa64.efi. (Which would then load fallback.efi which would look for \EFI\*\boot.csv and populate BootOrder and BootXXXX based on what it found.) Signed-off-by: Rob Clark <robdclark@gmail.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2017-09-20efi_loader: efi variable supportRob Clark
Add EFI variable support, mapping to u-boot environment variables. Variables are pretty important for setting up boot order, among other things. If the board supports saveenv, then it will be called in ExitBootServices() to persist variables set by the efi payload. (For example, fallback.efi configuring BootOrder and BootXXXX load-option variables.) Variables are *not* currently exposed at runtime, post ExitBootServices. On boards without a dedicated device for storage, which the loaded OS is not trying to also use, this is rather tricky. One idea, at least for boards that can persist RAM across reboot, is to keep a "journal" of modified variables in RAM, and then turn halt into a reboot into u-boot, plus store variables, plus halt. Whatever the solution, it likely involves some per-board support. Mapping between EFI variables and u-boot variables: efi_$guid_$varname = {attributes}(type)value For example: efi_8be4df61-93ca-11d2-aa0d-00e098032b8c_OsIndicationsSupported= "{ro,boot,run}(blob)0000000000000000" efi_8be4df61-93ca-11d2-aa0d-00e098032b8c_BootOrder= "(blob)00010000" The attributes are a comma separated list of these possible attributes: + ro - read-only + boot - boot-services access + run - runtime access NOTE: with current implementation, no variables are available after ExitBootServices, and all are persisted (if possible). If not specified, the attributes default to "{boot}". The required type is one of: + utf8 - raw utf8 string + blob - arbitrary length hex string Signed-off-by: Rob Clark <robdclark@gmail.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2017-09-20efi_loader: add file/filesys supportRob Clark
fallback.efi (and probably other things) use UEFI's simple-file-system protocol and file support to search for OS's to boot. Signed-off-by: Rob Clark <robdclark@gmail.com> [agraf: whitespace fixes, unsigned fixes] Signed-off-by: Alexander Graf <agraf@suse.de>
2017-09-20efi_loader: refactor boot device and loaded_image handlingRob Clark
Get rid of the hacky fake boot-device and duplicate device-path constructing (which needs to match what efi_disk and efi_net do). Instead convert over to use efi_device_path helpers to construct device-paths, and use that to look up the actual boot device. Also, extract out a helper to plug things in properly to the loaded_image. In a following patch we'll want to re-use this in efi_load_image() to handle the case of loading an image from a file_path. Signed-off-by: Rob Clark <robdclark@gmail.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2017-09-20efi_loader: flesh out device-path to textRob Clark
It needs to handle more device-path node types, and also multiple levels of path hierarchy. To simplify this, initially construct utf8 string to a temporary buffer, and then allocate the real utf16 buffer that is returned. This should be mostly for debugging or at least not critical- path so an extra copy won't hurt, and is saner than the alternative. Signed-off-by: Rob Clark <robdclark@gmail.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2017-09-20efi_loader: add device-path utilsRob Clark
Helpers to construct device-paths from devices, partitions, files, and for parsing and manipulating device-paths. For non-legacy devices, this will use u-boot's device-model to construct device-paths which include bus hierarchy to construct device-paths. For legacy devices we still fake it, but slightly more convincingly. Signed-off-by: Rob Clark <robdclark@gmail.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2017-09-18efi_loader: implement queueing of the notification functionHeinrich Schuchardt
For the correct implementation of the task priority level (TPL) calling the notification function must be queued. Add a status field 'queued' to events. In function efi_signal_event set status queued if a notification function exists and reset it after we have called the function. A later patch will add a check of the TPL here. In efi_create_event and efi_close_event unset the queued status. In function efi_wait_for_event and efi_check_event queue the notification function. In efi_timer_check call the efi_notify_event if the status queued is set. For all timer events set status signaled. In efi_console_timer_notify set the signaled state of the WaitForKey event. Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de> Signed-off-by: Alexander Graf <agraf@suse.de>
2017-09-18efi_selftest: provide an EFI selftest applicationHeinrich Schuchardt
A testing framework for the EFI API is provided. It can be executed with the 'bootefi selftest' command. It is coded in a way that at a later stage we may turn it into a standalone EFI application. The current build system does not allow this yet. All tests use a driver model and are run in three phases: setup, execute, teardown. A test may be setup and executed at boottime, it may be setup at boottime and executed at runtime, or it may be setup and executed at runtime. After executing all tests the system is reset. Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de> Signed-off-by: Alexander Graf <agraf@suse.de>
2017-09-18efi_loader: allow return value in EFI_CALLHeinrich Schuchardt
Macro EFI_CALL was introduced to call an UEFI function. Unfortunately it does not support return values. Most UEFI functions have a return value. So let's rename EFI_CALL to EFI_CALL_VOID and introduce a new EFI_CALL macro that supports return values. Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de> Signed-off-by: Alexander Graf <agraf@suse.de>
2017-09-18efi_loader: write protocol GUID in OpenProtocolHeinrich Schuchardt
To understand what is happening in OpenProtocol or LocateProtocol it is necessary to know the protocol interface GUID. Let's write a debug message. Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de> Signed-off-by: Alexander Graf <agraf@suse.de>
2017-08-18efi_loader: do not cast return value in EFI_EXITxypron.glpk@gmx.de
UEFI API functions have different return types. Some return a value of type EFI_STATUS other don't. We therefore should not cast the return value of EFI_EXIT to another type than the expression passed to EFI_EXIT. Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de> Signed-off-by: Alexander Graf <agraf@suse.de>
2017-07-29efi_loader: indent entry/exit prints to show nesting levelRob Clark
This should make it easier to see when a callback back to UEFI world calls back in to the u-boot world, and generally match up EFI_ENTRY() and EFI_EXIT() calls. Signed-off-by: Rob Clark <robdclark@gmail.com> [agraf: remove static from const var] Signed-off-by: Alexander Graf <agraf@suse.de>
2017-07-29efi_loader: add checking for incorrect use of EFI_ENTRY/EXITRob Clark
Missing an EFI_ENTRY() or doubling up EFI_EXIT() leads to non-obvious crashes. Let's add some error checking. Signed-off-by: Rob Clark <robdclark@gmail.com> [agraf: fix bogus assert() and fix app_gd breakage] Signed-off-by: Alexander Graf <agraf@suse.de>
2017-07-28efi_loader: Add an EFI_CALL() macroRob Clark
Rather than open-coding EFI_EXIT() + callback + EFI_ENTRY(), introduce an EFI_CALL() macro. This makes callbacks into UEFI world (of which there will be more in the future) more concise and easier to locate in the code. Signed-off-by: Rob Clark <robdclark@gmail.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2017-07-28efi_loader: only evaluate EFI_EXIT()'s ret onceRob Clark
There are a couple spots doing things like: return EFI_EXIT(some_fxn(...)); which I handn't noticed before. With addition of printing return value in the EFI_EXIT() macro, now the fxn call was getting evaluated twice. Which we didn't really want. Signed-off-by: Rob Clark <robdclark@gmail.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2017-07-25efi_loader: add helper macro to construct protocol objectsRob Clark
There are a bunch of protocols which should be exposed by GUID but are not. Add a helper macro to create an efi_object, to avoid much typing. Note that using the pointer for efiobj->handle is semi-arbitrary. We just need a unique value to match the efiobj supporting the protocol with the handle that LocateHandle() returns.. See LibLocateProtocol() in gnu-efi. It does LocateHandle() to find all the handles, and then loops over them calling HandleProtocol() with the GUID of the protocol it is trying to find. Signed-off-by: Rob Clark <robdclark@gmail.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2017-07-25efi_loader: log EFI return values tooRob Clark
Turns out this is rather useful to tracking down where things fail. Signed-off-by: Rob Clark <robdclark@gmail.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2017-07-24efi_loader: parameter types for CreateEvent, SetTimerxypron.glpk@gmx.de
The first argument 'type' of CreateEvent is an 32bit unsigned integer bitmap and not an enum. The second argument 'type' of SetTimer take values of an enum which is called EFI_TIMER_DELAY in the UEFI standard. To avoid confusion rename efi_event_type to efi_timer_delay. Reported-by: Alexander Graf <agraf@suse.de> Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de> Signed-off-by: Alexander Graf <agraf@suse.de>
2017-07-24efi_loader: move guidcmp to headerRob Clark
Want to re-use this for file protocol, which I'm working on. Signed-off-by: Rob Clark <robdclark@gmail.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2017-07-19efi_console: set up eventsxypron.glpk@gmx.de
Set up a timer event and the WaitForKey event. In the notify function of the timer event check for console input and signal the WaitForKey event accordingly. Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de> Signed-off-by: Alexander Graf <agraf@suse.de>
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