From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Kweh, Hock Leong" Subject: [PATCH v9 0/1] Enable capsule loader interface for efi firmware updating Date: Thu, 29 Oct 2015 01:58:56 +0800 Message-ID: <1446055138-26047-1-git-send-email-hock.leong.kweh@intel.com> Cc: Ong Boon Leong , LKML , linux-efi@vger.kernel.org, Sam Protsenko , Peter Jones , Andy Lutomirski , Roy Franz , Borislav Petkov , James Bottomley , Linux FS Devel , "Kweh, Hock Leong" , Fleming Matt , h.peter.anvin@intel.com To: Matt Fleming , Greg Kroah-Hartman Return-path: Sender: linux-kernel-owner@vger.kernel.org List-Id: linux-fsdevel.vger.kernel.org From: "Kweh, Hock Leong" Dear maintainers & communities, This patchset is created on top of Matt's patchset: 1.)https://lkml.org/lkml/2014/10/7/390 "[PATCH 1/2] efi: Move efi_status_to_err() to efi.h" 2.)https://lkml.org/lkml/2014/10/7/391 "[PATCH 2/2] efi: Capsule update support" It expose a misc char interface for user to upload the capsule binary and calling efi_capsule_update() API to pass the binary to EFI firmware. The steps to update efi firmware are: 1.) cat firmware.cap > /dev/efi_capsule_loader 2.) reboot Any failed upload error message will be returned while doing "cat" through file operation write() function call. Tested the code with Intel Quark Galileo GEN1 platform. Thanks. --- changelog v9: * squash 2 patches to become 1 patch * change function param to pass in cap_info instead of file structure * perform both alloc inside efi_capsule_setup_info() * change to use multiple exit labels instead of one function call * further code clean up base on Matt's comments changelog v8: * further clean up on kunmap() & efi_free_all_buff_pages() * design enhanced to support 1st few writes are less than efi header size * removed support to padding capsule and flag error once the upload size bigger than header defined size changelog v7: * add successful message printed in dmesg * shorten the code in efi_capsule_write() by splitting out efi_capsule_setup_info() & efi_capsule_submit_update() functions * design added capability to support multiple file open action * re-write those comments by following standard format * design added the "uncomplete" error return through flush() file operation changelog v6: * clean up on error handling for better code flow and review * clean up on pr_err() for critical error only * design taking care writing block that below PAGE_SIZE * once error has occurred, design will return -EIO until file close * document design expectations/scenarios in the code * change the dynamic allocation cap_info struct to statically allocated changelog v5: * changed to new design without leveraging firmware_class API * use misc_char device interface instead of sysfs * error return through file Write() function call Kweh, Hock Leong (1): efi: a misc char interface for user to update efi firmware drivers/firmware/efi/Kconfig | 10 drivers/firmware/efi/Makefile | 1 drivers/firmware/efi/capsule.c | 1 drivers/firmware/efi/efi-capsule-loader.c | 356 +++++++++++++++++++++++++++++ 4 files changed, 368 insertions(+) create mode 100644 drivers/firmware/efi/efi-capsule-loader.c -- 1.7.9.5