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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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79e29cb8fb
This commit adds the bootctl platform driver for Mellanox BlueField
Soc, which queries secure state and controls the eMMC boot partition
swapping by sending SMC calls to ATF running at EL3.
Below are the sequences of typical use case.
1. User requests boot partition swapping, which could be on-demand or
during boot-image upgrade via UEFI capsule;
2. This bootctl driver handles the request and sends SMC call
to ATF. ATF programs register BREADCRUMB0 which has value
preserved during warm reset. It also programs eMMC to swap
the boot partition;
3. After software reset (rebooting), ATF BL1 (BootRom) checks
register BREADCRUMB0 and enable watchdog if configured;
4. If booting fails, the watchdog timer will trigger rebooting.
In such case, ATF Boot ROM will switch the boot partition
back to the previous one. This is a robust feature and used
to prevent failure during boot partition upgrade.
Reviewed-by: Vadim Pasternak <vadimp@mellanox.com>
Signed-off-by: Liming Sun <lsun@mellanox.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
104 lines
4.1 KiB
C
104 lines
4.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (c) 2019, Mellanox Technologies. All rights reserved.
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*/
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#ifndef __MLXBF_BOOTCTL_H__
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#define __MLXBF_BOOTCTL_H__
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/*
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* Request that the on-chip watchdog be enabled, or disabled, after
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* the next chip soft reset. This call does not affect the current
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* status of the on-chip watchdog. If non-zero, the argument
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* specifies the watchdog interval in seconds. If zero, the watchdog
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* will not be enabled after the next soft reset. Non-zero errors are
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* returned as documented below.
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*/
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#define MLXBF_BOOTCTL_SET_POST_RESET_WDOG 0x82000000
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/*
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* Query the status which has been requested for the on-chip watchdog
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* after the next chip soft reset. Returns the interval as set by
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* MLXBF_BOOTCTL_SET_POST_RESET_WDOG.
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*/
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#define MLXBF_BOOTCTL_GET_POST_RESET_WDOG 0x82000001
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/*
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* Request that a specific boot action be taken at the next soft
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* reset. By default, the boot action is set by external chip pins,
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* which are sampled on hard reset. Note that the boot action
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* requested by this call will persist on subsequent resets unless
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* this service, or the MLNX_SET_SECOND_RESET_ACTION service, is
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* invoked. See below for the available MLNX_BOOT_xxx parameter
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* values. Non-zero errors are returned as documented below.
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*/
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#define MLXBF_BOOTCTL_SET_RESET_ACTION 0x82000002
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/*
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* Return the specific boot action which will be taken at the next
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* soft reset. Returns the reset action (see below for the parameter
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* values for MLXBF_BOOTCTL_SET_RESET_ACTION).
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*/
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#define MLXBF_BOOTCTL_GET_RESET_ACTION 0x82000003
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/*
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* Request that a specific boot action be taken at the soft reset
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* after the next soft reset. For a specified valid boot mode, the
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* effect of this call is identical to that of invoking
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* MLXBF_BOOTCTL_SET_RESET_ACTION after the next chip soft reset; in
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* particular, after that reset, the action for the now next reset can
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* be queried with MLXBF_BOOTCTL_GET_RESET_ACTION and modified with
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* MLXBF_BOOTCTL_SET_RESET_ACTION. You may also specify the parameter as
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* MLNX_BOOT_NONE, which is equivalent to specifying that no call to
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* MLXBF_BOOTCTL_SET_RESET_ACTION be taken after the next chip soft reset.
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* This call does not affect the action to be taken at the next soft
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* reset. Non-zero errors are returned as documented below.
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*/
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#define MLXBF_BOOTCTL_SET_SECOND_RESET_ACTION 0x82000004
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/*
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* Return the specific boot action which will be taken at the soft
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* reset after the next soft reset; this will be one of the valid
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* actions for MLXBF_BOOTCTL_SET_SECOND_RESET_ACTION.
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*/
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#define MLXBF_BOOTCTL_GET_SECOND_RESET_ACTION 0x82000005
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/*
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* Return the fuse status of the current chip. The caller should specify
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* with the second argument if the state of the lifecycle fuses or the
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* version of secure boot fuse keys left should be returned.
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*/
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#define MLXBF_BOOTCTL_GET_TBB_FUSE_STATUS 0x82000006
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/* Reset eMMC by programming the RST_N register. */
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#define MLXBF_BOOTCTL_SET_EMMC_RST_N 0x82000007
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#define MLXBF_BOOTCTL_GET_DIMM_INFO 0x82000008
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/* SMC function IDs for SiP Service queries */
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#define MLXBF_BOOTCTL_SIP_SVC_CALL_COUNT 0x8200ff00
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#define MLXBF_BOOTCTL_SIP_SVC_UID 0x8200ff01
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#define MLXBF_BOOTCTL_SIP_SVC_VERSION 0x8200ff03
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/* ARM Standard Service Calls version numbers */
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#define MLXBF_BOOTCTL_SVC_VERSION_MAJOR 0x0
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#define MLXBF_BOOTCTL_SVC_VERSION_MINOR 0x2
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/* Number of svc calls defined. */
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#define MLXBF_BOOTCTL_NUM_SVC_CALLS 12
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/* Valid reset actions for MLXBF_BOOTCTL_SET_RESET_ACTION. */
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#define MLXBF_BOOTCTL_EXTERNAL 0 /* Not boot from eMMC */
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#define MLXBF_BOOTCTL_EMMC 1 /* From primary eMMC boot partition */
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#define MLNX_BOOTCTL_SWAP_EMMC 2 /* Swap eMMC boot partitions and reboot */
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#define MLXBF_BOOTCTL_EMMC_LEGACY 3 /* From primary eMMC in legacy mode */
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/* Valid arguments for requesting the fuse status. */
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#define MLXBF_BOOTCTL_FUSE_STATUS_LIFECYCLE 0 /* Return lifecycle status. */
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#define MLXBF_BOOTCTL_FUSE_STATUS_KEYS 1 /* Return secure boot key status */
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/* Additional value to disable the MLXBF_BOOTCTL_SET_SECOND_RESET_ACTION. */
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#define MLXBF_BOOTCTL_NONE 0x7fffffff /* Don't change next boot action */
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#endif /* __MLXBF_BOOTCTL_H__ */
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