drivers/fpga/intel_sdm_mb.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * Copyright (C) 2018 Intel Corporation <www.intel.com>
 */

#include <altera.h>
#include <log.h>
#include <time.h>
#include <watchdog.h>
#include <asm/arch/mailbox_s10.h>
#include <asm/arch/smc_api.h>
#include <linux/delay.h>
#include <linux/errno.h>
#include <linux/intel-smc.h>
#include <linux/string.h>

#define RECONFIG_STATUS_POLL_RESP_TIMEOUT_MS		60000
#define RECONFIG_STATUS_INTERVAL_DELAY_US		1000000

#if !defined(CONFIG_XPL_BUILD) && defined(CONFIG_SPL_ATF)

#define BITSTREAM_CHUNK_SIZE				0xFFFF0
#define RECONFIG_STATUS_POLL_RETRY_MAX			100

static const struct mbox_cfgstat_major_err {
	int			err_no;
	const char		*error_name;
} mbox_cfgstat_major_err[] = {
	{MBOX_CFGSTATE_MAJOR_ERR_WRONG_BL31_VER,
	"Please check ATF BL31 version, require v2.11 above to print more error status."},
	{MBOX_CFGSTATE_MAJOR_ERR_STATE_CONFIG,
	"Mailbox in configuration state."},
	{MBOX_CFGSTATE_MAJOR_ERR_BITSTREAM_ERR,
	"Bitstream Invalid."},
	{MBOX_CFGSTATE_MAJOR_ERR_EXT_HW_ACCESS_FAIL,
	"External HW access failure."},
	{MBOX_CFGSTATE_MAJOR_ERR_BITSTREAM_CORRUPTION,
	"Bitstream valid but corrupted. Bitstream corruption error when reading the bitstream from the source."
	},
	{MBOX_CFGSTATE_MAJOR_ERR_INTERNAL_ERR,
	"Bitstream element not understood. Internal error."},
	{MBOX_CFGSTATE_MAJOR_ERR_DEVICE_ERR,
	"Unable to communicate on internal configuration network. Device operation error."},
	{MBOX_CFGSTATE_MAJOR_ERR_HPS_WDT,
	"HPS Watchdog Timer. HPS watchdog timeout failure."},
	{MBOX_CFGSTATE_MAJOR_ERR_INTERNAL_UNKNOWN_ERR,
	"Other unknown error occurred"},
	{MBOX_CFGSTATE_MAJOR_ERR_SYSTEM_INIT_ERR,
	"Error before main CMF start. System initialization failure."},
	{MBOX_CFGSTATE_MAJOR_ERR_DECRYPTION_ERR,
	"Decryption Error."},
	{MBOX_CFGSTATE_MAJOR_ERR_VERIFY_IMAGE_ERR,
	"Verify image error."},
	{MBOX_CFGSTATE_MAJOR_ERR_UNK,
	"Unknown error number at major field!"}
};

#define MBOX_CFGSTAT_MAJOR_ERR_MAX ARRAY_SIZE(mbox_cfgstat_major_err)

static const struct mbox_cfgstat_minor_err {
	int			err_no;
	const char		*error_name;
} mbox_cfgstat_minor_err[] = {
	{MBOX_CFGSTATE_MINOR_ERR_BASIC_ERR,
	"Catchall Error."},
	{MBOX_CFGSTATE_MINOR_ERR_CNT_RESP_ERR,
	"Detected an error during configuration. Detected an error during configuration."
	},
	{MBOX_CFGSTATE_MINOR_ERR_QSPI_DEV_ERR,
	"QSPI Device related error. Detected QSPI device related error during configuration."
	},
	{MBOX_CFGSTATE_MINOR_ERR_MAIN_DESC_INV,
	"Bitstream section main descriptor invalid. Detected an error during configuration due to a corrupted bitstream."
	},
	{MBOX_CFGSTATE_MINOR_ERR_BS_INCOMPATIBLE,
	"Bistream not compatible with device. Detected an error during configuration due to incompatible bitstream with the device."
	},
	{MBOX_CFGSTATE_MINOR_ERR_BS_INV_SHA,
	"Bitstream invalid SHA setting. Detected an error during configuration due to a corrupted bitstream."
	},
	{MBOX_CFGSTATE_MINOR_ERR_ROUTE_FAIL,
	"Bitstream processing route failed. Detected an error during configuration due to a corrupted bitstream."
	},
	{MBOX_CFGSTATE_MINOR_ERR_GO_BIT_ALREADY_SET,
	"Failed DMA during bitstream processing. Detected an error during configuration due to a corrupted bitstream."
	},
	{MBOX_CFGSTATE_MINOR_ERR_CPU_BLK_FAIL,
	"Failed DMA during bitstream processing. Detected an error during configuration."
	},
	{MBOX_CFGSTATE_MINOR_ERR_ACT_SKIP_FAIL,
	"Skip action failed. Detected an error during configuration."},
	{MBOX_CFGSTATE_MINOR_ERR_ACT_MCAST_FAIL,
	"Multicast Action Failed. Detected an error during configuration."},
	{MBOX_CFGSTATE_MINOR_ERR_ACT_IND_SZ_FAIL,
	"Index Size Action Failed. Detected an error during configuration."},
	{MBOX_CFGSTATE_MINOR_ERR_ACT_IF_FAIL,
	"If Action Failed. Detected an error during configuration."},
	{MBOX_CFGSTATE_MINOR_ERR_ACT_PIN_FAIL,
	"Pin Action Failed. Detected an error during configuration."},
	{MBOX_CFGSTATE_MINOR_ERR_ACT_FUSEFLTR_FAIL,
	"Fuse Filter Action Failed. Detected an error during configuration."},
	{MBOX_CFGSTATE_MINOR_ERR_ACT_GENERIC_FAIL,
	"Other Action Failed. Detected an error during configuration."},
	{MBOX_CFGSTATE_MINOR_ERR_DATA_STARVE_ERR,
	"Datapath starved. Detected an error during configuration."},
	{MBOX_CFGSTATE_MINOR_ERR_CNT_RAM_INIT_FAIL,
	"CNT/SSM RAM Initialization Failed. Detected an error during configuration."},
	{MBOX_CFGSTATE_MINOR_ERR_ACT_SETUP_S4,
	"S4 Setup Failed. Detected an error during configuration."},
	{MBOX_CFGSTATE_MINOR_ERR_WIPE_DATA_STARVE,
	"Datapath starved during wipe. Detected an error during configuration."},
	{MBOX_CFGSTATE_MINOR_ERR_FUSE_RD_FAIL,
	"eFUSE Read Failure. Detected an error during configuration."},
	{MBOX_CFGSTATE_MINOR_ERR_AUTH_FAIL,
	"Authentication Failure. Detected a bitstream authentication error during configuration."
	},
	{MBOX_CFGSTATE_MINOR_ERR_MAIN_DESC_SHA_FAIL,
	"Bitstream Section Main Descriptor Hash Check Failed. Detected an error during configuration due to a corrupted bitstream."
	},
	{MBOX_CFGSTATE_MINOR_ERR_SKIP_DATA_RAM_FAIL,
	"Skip Action Failed. Detected an error during configuration."},
	{MBOX_CFGSTATE_MINOR_ERR_ACT_FIXED_FAIL,
	"Fixed Action Failed. Detected an error during configuration."},
	{MBOX_CFGSTATE_MINOR_ERR_ACT_MCAST_FLTR_FAIL,
	"Multicast Filter Action Failed. Detected an error during configuration."},
	{MBOX_CFGSTATE_MINOR_ERR_ACT_SECTOR_FAIL,
	"Sector Group Action Failed. Detected an error during configuration."},
	{MBOX_CFGSTATE_MINOR_ERR_ACT_HASH_FAIL,
	"Hash Action Failed. Detected an error during configuration."},
	{MBOX_CFGSTATE_MINOR_ERR_ACT_DECOMP_SETUP_FAIL,
	"Decompression Setup Action Failed. Detected an error during configuration."},
	{MBOX_CFGSTATE_MINOR_ERR_INTERNAL_OS_ERR,
	"RTOS Error. Detected an error during configuration."},
	{MBOX_CFGSTATE_MINOR_ERR_WIPE_FAIL,
	"Wipe Bitstream Failed. Detected an error during configuration."},
	{MBOX_CFGSTATE_MINOR_ERR_CNOC_ERR,
	"Internal Configuration Network Failure. Detected an error during configuration."
	},
	{MBOX_CFGSTATE_MINOR_ERR_PMF_RESUME_FAIL,
	"Power Management Firmware Failed Resume. Detected an error during configuration."
	},
	{MBOX_CFGSTATE_MINOR_ERR_PMF_RUN_FAIL,
	"Power Management Firmware Failed Run. Detected an error during configuration."},
	{MBOX_CFGSTATE_MINOR_ERR_PMF_PAUSE_FAIL,
	"Power Management Firmware Failed Pause. Detected an error during configuration."
	},
	{MBOX_CFGSTATE_MINOR_ERR_RET_INT_ASSERT_FAIL,
	"Internal Configuration Network Return Interrupt Failure. Detected an error during configuration."
	},
	{MBOX_CFGSTATE_MINOR_ERR_STATE_MACHINE_ERR,
	"Configuration State Machine Error. Detected an error during configuration."},
	{MBOX_CFGSTATE_MINOR_ERR_CMF_TRANSITION_FAIL,
	"Error during CMF load/reload. Detected a firmware transition error during configuration."
	},
	{MBOX_CFGSTATE_MINOR_ERR_SHA_SETUP_FAIL,
	"Error setting up SHA engine. Detected an error during configuration."},
	{MBOX_CFGSTATE_MINOR_ERR_WR_DMA_TIMEOUT,
	"Write DMA timed out. Detected an error during configuration."},
	{MBOX_CFGSTATE_MINOR_ERR_MEM_ALLOC_FAIL,
	"Out of Memory. Detected an error during configuration."},
	{MBOX_CFGSTATE_MINOR_ERR_SYNC_RD_FAIL,
	"Sync Block Read Fail. Detected an error during configuration."},
	{MBOX_CFGSTATE_MINOR_ERR_CHK_CFG_REQ_FAIL,
	"Configuration Status Check Failed. Detected an error during configuration."},
	{MBOX_CFGSTATE_MINOR_ERR_HPS_CFG_REQ_FAIL,
	"HPS Configuration Request Failed. Detected an error during configuration."},
	{MBOX_CFGSTATE_MINOR_ERR_CFG_HANDLE_ERR,
	"Driver Handle Error. Detected an error during configuration."},
	{MBOX_CFGSTATE_MINOR_ERR_INV_ACTION_ITEM,
	"Bistream contains invalid action. Detected an error during configuration."},
	{MBOX_CFGSTATE_MINOR_ERR_SKIP_DATA_PREBUF_ERR,
	"Prebuffer Error during Skip Action. Detected an error during configuration."},
	{MBOX_CFGSTATE_MINOR_ERR_MBOX_TIMEOUT,
	"Mailbox Processing Timeout. Detected an error during configuration."},
	{MBOX_CFGSTATE_MINOR_ERR_AVST_FIFO_OVERFLOW_ERR,
	"AVST FIFO Overflow. Detected an error during configuration."},
	{MBOX_CFGSTATE_MINOR_ERR_RD_DMA_TIMEOUT,
	"Read DMA timed out. Detected an error during configuration."},
	{MBOX_CFGSTATE_MINOR_ERR_PMF_INIT_ERR,
	"Power Management Firmware Initialization Error. Detected a PMBUS error during configuration."
	},
	{MBOX_CFGSTATE_MINOR_ERR_PMF_SHUTDOWN_ERR,
	"Power Management Firmware Shutdown Error. Detected a PMBUS error during configuration."
	},
	{MBOX_CFGSTATE_MINOR_ERR_BITSTREAM_INTERRUPTED,
	"Bitstream processing was interrupted by another event. Detected an error during configuration."
	},
	{MBOX_CFGSTATE_MINOR_ERR_FPGA_MBOX_WIPE_TIMEOUT,
	"Mailbox Wipe Timeout. Detected an error during configuration."},
	{MBOX_CFGSTATE_MINOR_ERR_MAIN_DESC_TYPE_INV,
	"Bitstream Section Main Descriptor Type is Invalid. Detected an error during configuration due to a corrupted bitstream."
	},
	{MBOX_CFGSTATE_MINOR_ERR_MAIN_DESC_VERSION_INV,
	"Bitstream Section Main Descriptor Version is Invalid. Detected an error during configuration due to a corrupted bitstream."
	},
	{MBOX_CFGSTATE_MINOR_ERR_MAIN_DESC_DEVICE_TYPE_INV,
	"Bitstream Section Main Descriptor Device is Invalid. Detected an error during configuration due to a corrupted bitstream."
	},
	{MBOX_CFGSTATE_MINOR_ERR_MAIN_DESC_DESIGN_HASH_ERR,
	"Bitstream Section Main Descriptor Hash Mismatch. Detected an error during configuration due to a corrupted bitstream."
	},
	{MBOX_CFGSTATE_MINOR_ERR_MAIN_DESC_EXT_REF_CLK_ERR,
	"Bitstream Section Main Descriptor External Clock Setting Invalid. Detected an error during configuration due to a corrupted bitstream."
	},
	{MBOX_CFGSTATE_MINOR_ERR_MAIN_DESC_PWR_TBL_INV,
	"Bitstream Section Main Descriptor Power Table is invalid. Detected an error during configuration due to a corrupted bitstream."
	},
	{MBOX_CFGSTATE_MINOR_ERR_MAIN_DESC_PIN_TBL_OFST_ERR,
	"Bitstream Section Main Descriptor Offset to Pin Table is Invalid. Detected an error during configuration due to a corrupted bitstream."
	},
	{MBOX_CFGSTATE_MINOR_ERR_MAIN_DESC_PIN_TBL_INV,
	"Bitstream Section Main Descriptor Pin Table is Invalid. Detected an error during configuration due to a corrupted bitstream."
	},
	{MBOX_CFGSTATE_MINOR_ERR_MAIN_DESC_NO_PIN_TBL,
	"Bitstream Section Main Descriptor missing pin table. Detected an error during configuration due to a corrupted bitstream."
	},
	{MBOX_CFGSTATE_MINOR_ERR_MAIN_DESC_CFG_CLK_PLL_FAILED,
	"Bitstream Section Main Descriptor PLL setting failure. Detected an error during configuration due to a corrupted bitstream."
	},
	{MBOX_CFGSTATE_MINOR_ERR_MAIN_DESC_AS_CLK_FAILED,
	"Bitstream Section Main Descriptor QSPI Clock Setting Failure. Detected an error during configuration due to a corrupted bitstream."
	},
	{MBOX_CFGSTATE_MINOR_ERR_MAIN_DESC_POF_ID_FAILED,
	"Bitstream Section Main Descriptor POF ID not valid. Detected an incompatible PR bitstream during configuration."
	},
	{MBOX_CFGSTATE_MINOR_ERR_MAIN_DESC_PW_TBL_OFST_ERR,
	"code not used."},
	{MBOX_CFGSTATE_MINOR_ERR_MAIN_DESC_PP_TBL_OFST_ERR,
	"code not used."},
	{MBOX_CFGSTATE_MINOR_ERR_MAIN_DESC_PP_TBL_INV,
	"code not used."},
	{MBOX_CFGSTATE_MINOR_ERR_MAIN_DESC_SP_TBL_OFST_ERR,
	"code not used."},
	{MBOX_CFGSTATE_MINOR_ERR_MAIN_DESC_SP_TBL_INV,
	"code not used."},
	{MBOX_CFGSTATE_MINOR_ERR_MAIN_DESC_SU_TBL_OFST_ERR,
	"code not used."},
	{MBOX_CFGSTATE_MINOR_ERR_MAIN_DESC_SU_TBL_INV,
	"code not used."},
	{MBOX_CFGSTATE_MINOR_ERR_MBOX_TASK_CRYPTO_SRC_CLR_ERR,
	"Mailbox Source Failed to Clear. Detected an error during configuration."},
	{MBOX_CFGSTATE_MINOR_ERR_MBOX_TASK_EVENT_GROUP_POST_ERR,
	"Mailbox Event Post Error. Detected an error during configuration."},
	{MBOX_CFGSTATE_MINOR_ERR_TRNG_TEST_FAIL,
	"True Random Number Generator Failed Test. Detected an error during configuration."
	},
	{MBOX_CFGSTATE_MINOR_ERR_MBOX_TASK_ANTI_DOS_TMR_INIT_ERR,
	"Mailbox Anti-DOS Timer failed initialization. Detected an error during configuration."
	},
	{MBOX_CFGSTATE_MINOR_ERR_OS_STK_CHK_ERR,
	"RTOS Stack Check Error. Detected an error during configuration."},
	{MBOX_CFGSTATE_MINOR_ERR_MBOX_TASK_INIT,
	"Mailbox Task failed to initialize. Detected an error during configuration."},
	{MBOX_CFGSTATE_MINOR_ERR_MAIN_DESC_COMPAT_ID_MATCH_ERR,
	"Bitstream Section Main Descriptor Compatibility ID mismatch. Detected a bitstream error during configuration."
	},
	{MBOX_CFGSTATE_MINOR_ERR_MAIN_DESC_COMPAT_ID_INV,
	"Bitstream Section Main Descriptor Compatibility ID not Valid. Detected an error during configuration due to a corrupted bitstream."
	},
	{MBOX_CFGSTATE_MINOR_ERR_MAIN_DESC_AES_ECRYPT_CHK_FAIL,
	"Bitstream Section Main Descriptor AES Test Failed. Detected an error during configuration due to a corrupted bitstream."
	},
	{MBOX_CFGSTATE_MINOR_ERR_ACT_KEY_FAIL,
	"Key Action Failure. Detected a bitstream decryption error during configuration due to a corrupted bitstream."
	},
	{MBOX_CFGSTATE_MINOR_ERR_ACT_KEY_CHALLENGE_FAIL,
	"Key Challenge Failure. Detected a bitstream decryption error during configuration."
	},
	{MBOX_CFGSTATE_MINOR_ERR_MBOX_TASK_MSGQ_DEQUEUE_FAIL,
	"Mailbox Task Queue failed to dequeue. Detected an error during configuration."},
	{MBOX_CFGSTATE_MINOR_ERR_SECT_COMPAT_CHK_ERR,
	"Bitstream Section Compatibility Check Error. Detected an error during configuration due to a corrupted bitstream."
	},
	{MBOX_CFGSTATE_MINOR_ERR_SECT_COMPAT_UPDATE_ERR,
	"Bitstream Section Compatibility Update Error. Detected an error during configuration due to a corrupted bitstream."
	},
	{MBOX_CFGSTATE_MINOR_ERR_SECT_SEC_CHK_FAILED,
	"Bitstream Section Security Check Failed. Detected an error during configuration due to a corrupted bitstream."
	},
	{MBOX_CFGSTATE_MINOR_ERR_CNT_RAM_ECC_ERR_UNRECOVERABLE,
	"Unrecoverable Error in CNT/SSM RAM. Detected an error during configuration."},
	{MBOX_CFGSTATE_MINOR_ERR_MBOX_REFORMAT_INPUT_ERR,
	"Mailbox Input Processing Error. Detected an error during configuration."},
	{MBOX_CFGSTATE_MINOR_ERR_MBOX_REFORMAT_OUTPUT_ERR,
	"Mailbox Output Processing Error. Detected an error during configuration."},
	{MBOX_CFGSTATE_MINOR_ERR_MBOX_WLBL_ERR,
	"(Provision only) Provision CMF's allowed mailbox cmd group is invalid. Detected an error during configuration."
	},
	{MBOX_CFGSTATE_MINOR_ERR_MBOX_HOOK_CB_ERR,
	"Mailbox Callback Error. Detected an error during configuration."},
	{MBOX_CFGSTATE_MINOR_ERR_CMF_RLD_DECOMP_LOAD_ERR,
	"CMF Reload failed to load Decompression Code. Detected an error during configuration."
	},
	{MBOX_CFGSTATE_MINOR_ERR_CMF_RLD_DECOMP_RUN_ERR,
	"CMF Reload failed to run Decompression Code. Detected an error during configuration."
	},
	{MBOX_CFGSTATE_MINOR_ERR_CNT_PERIPH_ECC_ERR_UNRECOVERABLE,
	"Unrecoverable Error in CNT/SSM Peripheral. Detected an error during configuration."
	},
	{MBOX_CFGSTATE_MINOR_ERR_MAIN_SECT_ADDR_ERR,
	"(Provision only) invalid Flash image CMF header's main section address. Detected an error during configuration."
	},
	{MBOX_CFGSTATE_MINOR_ERR_MAIN_DESC_SCRAMBLE_RATIO_CHK_FAIL,
	"Bitstream Section Main Descriptor Invalid Scrambler Ratio. Detected an error during configuration due to a corrupted bitstream."
	},
	{MBOX_CFGSTATE_MINOR_ERR_TAMPER_EVENT_TRIGGERED,
	"Tamper Detected. Detected an error during configuration."},
	{MBOX_CFGSTATE_MINOR_ERR_MAIN_DESC_ANTI_TAMPER_TBL_INV,
	"Bitstream Section Main Descriptor Anti Tamper Table Invalid. Detected an error during configuration due to a corrupted bitstream."
	},
	{MBOX_CFGSTATE_MINOR_ERR_MAIN_DESC_EXT_CLCK_MODE_DISALLOWED,
	"External Clock info presented, but external clock not allowed on device. Detected an error during configuration due to a corrupted bitstream."
	},
	{MBOX_CFGSTATE_MINOR_ERR_MAIN_DESC_SEC_OPTIONS_INIT_FAIL,
	"Bitstream Section Main Descriptor Security Option Initialization Failed. Detected an error during configuration due to a corrupted bitstream."
	},
	{MBOX_CFGSTATE_MINOR_ERR_MAIN_DESC_EN_USR_CAN_FUSE_INV,
	"User cancellation fuse table initialization failed. Detected an error during configuration."
	},
	{MBOX_CFGSTATE_MINOR_ERR_MAIN_DESC_AS_DEVICE_NO_SGX_ERR,
	"Not yet turned on for Rearch code. Detected an incompatible bitstream during configuration. You cannot use the bitstream from an advanced security-enabled devices on a non-advanced security-enabled device."
	},
	{MBOX_CFGSTATE_MINOR_ERR_MAIN_DESC_POF_ID_LIMIT_EXCEED_ERR,
	"Not yet turned on for Rearch code. Detected an invalid bitstream during configuration."
	},
	{MBOX_CFGSTATE_MINOR_ERR_PROVISION_CMF_INV_STATE,
	"(Provision only) Internal state machine wrong state. Detected an error during configuration."
	},
	{MBOX_CFGSTATE_MINOR_ERR_PROVISION_CMF_FATAL_ERR,
	"(Provision only) Fatal error detected with Provision CMF. Detected an error during configuration."
	},
	{MBOX_CFGSTATE_MINOR_ERR_PROVISION_CMF_SM_EXIT_FAIL,
	"(Provision only) State machine's state function exit error. Detected an error during configuration."
	},
	{MBOX_CFGSTATE_MINOR_ERR_PROVISION_CMF_SM_ENTRY_FAIL,
	"(Provision only) State machine's state function entry error. Detected an error during configuration."
	},
	{MBOX_CFGSTATE_MINOR_ERR_ACTION_DATA_UNSUPPORTED_CTX,
	"Not yet turned on for Rearch code. Detected an error during configuration."},
	{MBOX_CFGSTATE_MINOR_ERR_CMF_EXCEPTION,
	"Processor Exception. Detected an error during configuration."},
	{MBOX_CFGSTATE_MINOR_ERR_ECC_INIT_FAIL,
	"SDM Peripheral ECC Initialization Failure. Detected an error during configuration."
	},
	{MBOX_CFGSTATE_MINOR_ERR_DEFAULT_UNREGISTERED_ISR,
	"Unregistered Interrupt Occurred. Detected an error during configuration."},
	{MBOX_CFGSTATE_MINOR_ERR_GENERAL_TIMEOUT,
	"Execution Timeout. Detected an error during configuration."},
	{MBOX_CFGSTATE_MINOR_ERR_ACT_OPERATION_CLK_FAIL,
	"Clock Operation Action Failed. Detected an error during configuration."},
	{MBOX_CFGSTATE_MINOR_ERR_ACT_VERIFY_HASH_FAIL,
	"Verify Hash Action Failed. Detected an error during configuration."},
	{MBOX_CFGSTATE_MINOR_ERR_CFG_STATE_UPDATE_ERR,
	"Error updating configuration state. Detected an error during configuration."},
	{MBOX_CFGSTATE_MINOR_ERR_MAIN_DESC_READ_DDR_HASH_FAIL,
	"Error while reading HPS DDR hash from main descriptor."},
	{MBOX_CFGSTATE_MINOR_ERR_CVP_FLOW_ERR,
	"Error during CvP Phase 2 data flow handling or handshake."},
	{MBOX_CFGSTATE_MINOR_ERR_MAIN_DESC_KEYED_HASH_ERR,
	"Encountered keyed hash error while processing a main descriptor."},
	{MBOX_CFGSTATE_MINOR_ERR_CMF_DESC_BAD_JTAG_ID,
	"New CMF Descriptor JTAG ID mismatch with original configured CMF JTAG ID."
	},
	{MBOX_CFGSTATE_MINOR_ERR_MAIN_DESC_PMF_NOT_SUPPORTED,
	"The IO Descriptor contains a power table but the current CMF does not support PMF. Bitstream incompatile with Firmware."
	},
	{
	MBOX_CFGSTATE_MINOR_ERR_MAIN_DESC_ANTI_TAMPER_NOT_SUPPORTED,
	"The IO Descriptor contains anti-tamper setting but the current CMF does not support anti-tamper. Bitstream incompatile with Firmware."
	},
	{MBOX_CFGSTATE_MINOR_ERR_ACT_RECOVERY_FAIL,
	"Recovery Action Failed. Detected an error during configuration."},
	{MBOX_CFGSTATE_MINOR_ERR_COLD_RESET_CMF_CORRUPTED,
	"Error when process CMF section after cold reset. Detected CMF section error or incompatible upon cold reset using JTAG or AVST."
	},
	{MBOX_CFGSTATE_MINOR_ERR_COLD_RESET_IO_HPS_CORRUPTED,
	"Error when process IO/HPIO/HPS section after cold reset and hps wipe. Detected an error when try to bring up HPS again after cold reset."
	},
	{MBOX_CFGSTATE_MINOR_ERR_COLD_RESET_FPGA_CORRUPTED,
	"Error when process FPGA section header after cold reset. Detected an error in FPGA after successfully bring up HPS."
	},
	{MBOX_CFGSTATE_MINOR_ERR_CRC_CHK_FAIL,
	" CRC32 Check Fail. Detected an error during configuration."},
	{MBOX_CFGSTATE_MINOR_ERR_COMPAT_TBL_SFIXED_VALUE_INV,
	"Error when process compatibility table in main section header. SFixed offset value in compatibility table is not valid."
	},
	{
	MBOX_CFGSTATE_MINOR_ERR_FEATURE_EN_FUSE_NOT_BLOWN,
	"Error bitstream contains feature(s) that are only allowed when a feature fuse is blown on the device, and the device did not have the feature fuse blown. Bitstream requires feature enable fuse to be blown."
	},
	{MBOX_CFGSTATE_MINOR_ERR_UIB_REFCLK_MISSING,
	"UIB REFCLK missing. Device requires refclk to proceed configuration."},
	{MBOX_CFGSTATE_MINOR_ERR_UIB_REFCLK_TIMEOUT,
	"UIB REFCLK timeout. Device requires refclk to proceed configuration."},
	{MBOX_CFGSTATE_MINOR_ERR_UIB_REFCLK_TIMEOUT_MISSING,
	"UIB REFCLK missing and timeout. Device requires refclk to proceed configuration."
	},
	{MBOX_CFGSTATE_MINOR_ERR_TRAMP_SYNC_BLCK_ERR,
	"Sync block before SSBL processing failure. Detected a firmware error during reconfiguration."
	},
	{MBOX_CFGSTATE_MINOR_ERR_TRAMP_SSBL_SHA_ERR,
	"SSBL sha mismatch with bitstream. Detected a bitstream error during reconfiguration."
	},
	{MBOX_CFGSTATE_MINOR_ERR_TRAMP_BLCK0_SHA_MISMATCH_ERR,
	"Block0 Sha mismatch when trampoline reloads. Detected a bitstream error during reconfiguration."
	},
	{MBOX_CFGSTATE_MINOR_ERR_TRAMP_BLCK0_AUTH_ERR,
	"Trampoline authentication failure. Detected a bitstream error during reconfiguration."
	},
	{MBOX_CFGSTATE_MINOR_ERR_TRAMP_TRAMP_LOAD_ERR,
	"Trampoline Load compressed tramp failure. Detected a bitstream error during reconfiguration."
	},
	{MBOX_CFGSTATE_MINOR_ERR_TRAMP_CMF_SIZE_ERR,
	"Trampoline failed to retrieve SSBL or TSBL load information. Detected a bitstream error during reconfiguration."
	},
	{MBOX_CFGSTATE_MINOR_ERR_TRAMP_TRANSITION_ERR,
	"Trampoline failed to find a bootable DCMF. Detected an error during application images transition."
	},
	{MBOX_CFGSTATE_MINOR_ERR_TRAMP_SYNC_ERR,
	"Only used by RMA and ENG loader on legacy code. Detected an error during configuration."
	},
	{MBOX_CFGSTATE_MINOR_ERR_TRAMP_LOAD_CERT_ERR,
	"Main CMF failed to authenticate a certificate bitstream. Detected a bitstream authentication error during reconfiguration."
	},
	{MBOX_CFGSTATE_MINOR_ERR_TRAMP_LOAD_NOT_ALLOWED_ERR,
	"Only used by Provision CMF, failure to initialize HW drivers. Detected an error during reconfiguration."
	},
	{MBOX_CFGSTATE_MINOR_ERR_TRAMP_FUSE_ERR,
	"Only used by RMA and Eng loader on Legacy code. Detected an error during configuration."
	},
	{MBOX_CFGSTATE_MINOR_ERR_TRAMP_INPUT_BUFFER_ERR,
	"Provision CMF only, Trampoline inbuf HW access error. Detected a hardware error during reconfiguration."
	},
	{MBOX_CFGSTATE_MINOR_ERR_TRAMP_CMF_TYPE_ERR,
	"Trampoline/DCMF loading another CMF andfound CMF type mismatched with current one. Detected a bitstream error during reconfiguration."
	},
	{MBOX_CFGSTATE_MINOR_ERR_TRAMP_QSPI_INDR_READ_START_ERR,
	"Trampoline QSPI indirect read start error. Detected an error when accessing the QSPI flash."
	},
	{MBOX_CFGSTATE_MINOR_ERR_PMF_I2C_COMM_ERR,
	"Generic I2C error, ie Bad Address."},
	{MBOX_CFGSTATE_MINOR_ERR_PMF_TARGET_VOLTAGE_ERR,
	"Failed to reach Target Voltage. Voltage Regulator unable to achieve the requested voltage."
	},
	{MBOX_CFGSTATE_MINOR_ERR_PMF_HANDSHAKE_ERR,
	"Slave Mode ALERT/VOUT_COMMAND handshake did not happen."},
	{MBOX_CFGSTATE_MINOR_ERR_PMF_ITD_OUT_OF_RANGE_ERR,
	"Fuse values calculated voltage greater that cutoff max. ITD fuse is out of range."
	},
	{MBOX_CFGSTATE_MINOR_ERR_PMF_PWR_TABLE_ERR,
	"Error while reading or processing the Power Table. Internal Error while reading or decoding the Bitstream's Power Table."
	},
	{MBOX_CFGSTATE_MINOR_ERR_PMF_EFUSE_DECODE_ERR,
	"Error while reading or decoding the efuse values. Internal Error while reading or decoding the efuse values."
	},
	{MBOX_CFGSTATE_MINOR_ERR_PMF_VCCL_PWRGOOD_ERR,
	"Failed to verify the vccl power is good. Failed to validate the vccl power is valid on the board."
	},
	{MBOX_CFGSTATE_MINOR_ERR_PMF_CLR_FAULTS_ERR,
	"Error while sending CLEAR_FAULTS command. Error while sending CLEAR_FAULTS command,"
	},
	{MBOX_CFGSTATE_MINOR_ERR_PMF_VOUT_MODE_ERR,
	"Error while sending VOUT_MODE command. Error while sending VOUT_MODE command,"},
	{MBOX_CFGSTATE_MINOR_ERR_PMF_PAGE_COMMAND_ERR,
	"Error while sending PAGE_COMMAND command. Error while sending PAGE_COMMAND command,"
	},
	{MBOX_CFGSTATE_MINOR_ERR_PMF_VOUT_COMMAND_ERR,
	"Error while sending VOUT_COMMAND command. Error while sending VOUT_COMMAND command,"
	},
	{MBOX_CFGSTATE_MINOR_ERR_PMF_READ_VOUT_ERR,
	"Error while sending READ_VOUT command. Error while sending READ_VOUT command,"},
	{MBOX_CFGSTATE_MINOR_ERR_PMF_LTM4677_DEFAULT_ADC_CTRL_ERR,
	"Error while sending the vendor specific LTM4677 MFR_ADC_CTRL command. Error while sending the vendor specific LTM4677 MFR_ADC_CTRL command,"
	},
	{MBOX_CFGSTATE_MINOR_ERR_PMF_FIRST_I2C_CMD_FAILED_ERR,
	"First I2C messaged failed, ie Bad Address. The first I2C command has failed, no response from Voltage Regulator."
	},
	{MBOX_CFGSTATE_MINOR_ERR_RSU_CMF_AUTH_ERR,
	"Failed to authenticate CMF section. Detected a firmware authentication error during configuration."
	},
	{MBOX_CFGSTATE_MINOR_ERR_RSU_USER_AUTH_ERR,
	"Failed to authenticate USER section. Detected a bitstream authentication error during configuration."
	},
	{MBOX_CFGSTATE_MINOR_ERR_RSU_CMF_DESC_SHA_MISMATCH,
	"Block0 SHA mismatch when DCMF loads an APP image. Detected an error when loading the application image from flash."
	},
	{MBOX_CFGSTATE_MINOR_ERR_RSU_POINTERS_NOT_FOUND_ERR,
	"RSU CPB table parsing failed. Detected an error when parsing the RSU CPB block."
	},
	{MBOX_CFGSTATE_MINOR_ERR_RSU_QSPI_FREQ_CHANGE,
	"QSPI reference clock freq update failed. Detected an error during configuration."
	},
	{MBOX_CFGSTATE_MINOR_ERR_RSU_FACTORY_IMG_FAILED,
	"RSU factory image failed to boot. Detected an error when loading the factory image. Check the factory image validity. If corrupted, regenerate and reprogram again the factory image in the flash. When authentication enabled,"
	},
	{MBOX_CFGSTATE_MINOR_ERR_RSU_CMF_TYPE_ERR,
	"APP image CMF type mismatched with DCMF. Detected an error when loading the application image."
	},
	{
	MBOX_CFGSTATE_MINOR_ERR_RSU_UCMF_SIG_DESC_ERR,
	"UCMF reports failure in parsing of an signature block, can be from new DCMF, new DCIO or new Factory. Detected an error during factory image update in flash."
	},
	{MBOX_CFGSTATE_MINOR_ERR_RSU_UCMF_INTERNAL_AUTH_ERR,
	"UCMF reports authentication failure of new DCMF, new DCIO or new Factory. Detected an error during DCMF update in flash."
	},
	{MBOX_CFGSTATE_MINOR_ERR_RSU_UCMF_COPY_FAILED,
	"UCMF reports QSPI flash write failure while upgrading DCMF, DCIO or Factory. Detected an error during DCMF update in flash."
	},
	{MBOX_CFGSTATE_MINOR_ERR_RSU_UCMF_ERASE_FAILED,
	"UCMF reports QSPI flash erase failure while upgrading DCMF, DCIO or Factory. Detected an error during DCMF update in flash."
	},
	{MBOX_CFGSTATE_MINOR_ERR_RSU_RM_UCMF_FROM_CPB_FAILED,
	"UCMF reports failure to remove UCMF address from RSU CPB table. Detected an error during RSU CPB table update in flash."
	},
	{MBOX_CFGSTATE_MINOR_ERR_RSU_UCMF_COMBINED_APP_AUTH_ERR,
	"UCMF reports authentication failure of new combined app image. Detected an error during combined app image update in flash."
	},
	{MBOX_CFGSTATE_MINOR_ERR_RSU_UCMF_FLASH_ACCESS_ERR,
	"UCMF failed to upgrade for more than max retry times. Detected an error during DCMF update in flash."
	},
	{MBOX_CFGSTATE_MINOR_ERR_RSU_DCMF_DCIO_CORRUPTED,
	"DCMF reports failure when parse dcio section, causing force factory boot. Detected an error when parsing dcio section."
	},
	{MBOX_CFGSTATE_MINOR_ERR_RSU_DCMF_CPB0_CORRUPTED,
	"DCMF reports failure when parse cpb0 and thus cpb1 is used. Detected an error in RSU CPB0 table."
	},
	{MBOX_CFGSTATE_MINOR_ERR_RSU_DCMF_CPB1_CORRUPTED,
	"DCMF reports failure when parse both cpb0 and cpb1, causing force factory boot. Detected an error in both RSU CPB0 and CPB1 table."
	},
	{MBOX_CFGSTATE_MINOR_ERR_RSU_PROVISION_COMPLETE,
	"Non-JTAG Provisioning Successful. Non-Jtag Provisioning was Successful DCMF will load next highest priority application image."
	},
	{MBOX_CFGSTATE_MINOR_ERR_RSU_PROVISION_ERR,
	"Non-JTAG Provisioning Failed. An error occurred while provisioning the device."},
	{MBOX_CFGSTATE_MINOR_ERR_SYSINIT_EFUSE_INIT_FAIL,
	"Efuse cache generation failure. Detected an error during configuration."},
	{MBOX_CFGSTATE_MINOR_ERR_SYSINIT_SEC_PROT_ERR,
	"Security lock and disable driver failure. Detected an error during configuration."
	},
	{MBOX_CFGSTATE_MINOR_ERR_SYSINIT_EFUSE_LCK_ERR,
	"efuse lock operation failure."},
	{MBOX_CFGSTATE_MINOR_ERR_SYSINIT_SEC_BBRAM_CLEAN_ERR,
	"BBRAM clean up failure."},
	{MBOX_CFGSTATE_MINOR_ERR_SYSINIT_ENG_LOAD_DIMK_ERR,
	"DIMK failed to derive device identity."},
	{MBOX_CFGSTATE_MINOR_ERR_SYSINIT_SEC_UKV_CLEAN_ERR,
	"Key Vault clean up failure."},
	{MBOX_CFGSTATE_MINOR_ERR_SYSINIT_EFUSE_ZERO_ERR,
	"No security efuse allowed."},
	{MBOX_CFGSTATE_MINOR_ERR_SYSINIT_ENG_LOAD_ERR,
	"efuse policy check failed."},
	{MBOX_CFGSTATE_MINOR_ERR_SYSINIT_PERST_INIT_FAIL,
	"Peristent data initialization failure. Detected an error during configuration."
	},
	{MBOX_CFGSTATE_MINOR_ERR_SYSINIT_DIMK_INIT_FAIL,
	"DIMK Initialization failure. Detected an error during configuration."},
	{MBOX_CFGSTATE_MINOR_ERR_SYSINIT_PERST_SECONDARY_INIT_FAIL,
	"Handoff data include CMF main and signature blocks validation failure. Detected an error during configuration."
	},
	{MBOX_CFGSTATE_MINOR_ERR_SYSINIT_BR_INFO_INIT_FAIL,
	"CMF Bootrom header validation failure."},
	{MBOX_CFGSTATE_MINOR_ERR_SYSINIT_CMF_DESC_FAIL,
	"CMF Descriptor failure."},
	{MBOX_CFGSTATE_MINOR_ERR_SYSINIT_DRNG_INIT_FAIL,
	"DRNG Initialization failed."},
	{MBOX_CFGSTATE_MINOR_ERR_UNK,
	"Unknown error number at minor field!"}
};

#define MBOX_CFGSTAT_MINOR_ERR_MAX ARRAY_SIZE(mbox_cfgstat_minor_err)

struct mbox_err_msg {
	const char *major_err_str;
	const char *minor_err_str;
};

static void mbox_cfgstat_to_str(int err, struct mbox_err_msg *err_msg)
{
	int i;
	u32 major_err;
	u32 minor_err;

	major_err = FIELD_GET(MBOX_CFG_STATUS_MAJOR_ERR_MSK, err);

	minor_err = FIELD_GET(MBOX_CFG_STATUS_MINOR_ERR_MSK, err);

	if (!err_msg) {
		printf("Invalid argument\n");
		return;
	}

	err_msg->major_err_str = "";
	err_msg->minor_err_str = "";

	/*
	 * In the case of getting error number 0, meaning the
	 * ATF BL31 is not supporting the feature yet thus,
	 * the SMC call will return 0 at the second argument
	 * return the message to indicate that current BL31
	 * is not yet supporting feature and need to check
	 * the BL31 version.
	 */
	if (err == 0) {
		err_msg->major_err_str = mbox_cfgstat_major_err[err].error_name;
		return;
	}

	/* Initialize the major error string with unknown error */
	err_msg->major_err_str = mbox_cfgstat_major_err[0].error_name;

	for (i = 0; i < MBOX_CFGSTAT_MAJOR_ERR_MAX - 1; i++) {
		if (mbox_cfgstat_major_err[i].err_no == major_err) {
			err_msg->major_err_str = mbox_cfgstat_major_err[i].error_name;
			break;
		}
	}

	/* Return configuration state if device still under config state */
	if (major_err == MBOX_CFGSTATE_MAJOR_ERR_STATE_CONFIG)
		return;

	/* Initialize the minor error string with unknown error */
	err_msg->minor_err_str = mbox_cfgstat_minor_err[0].error_name;

	for (i = 0; i < MBOX_CFGSTAT_MINOR_ERR_MAX - 1; i++) {
		if (mbox_cfgstat_minor_err[i].err_no == minor_err) {
			err_msg->minor_err_str = mbox_cfgstat_minor_err[i].error_name;
			break;
		}
	}
}

/*
 * Polling the FPGA configuration status.
 * Return 0 for success, non-zero for error.
 */
static int reconfig_status_polling_resp(uint32_t *error_status)
{
	int ret;
	u64 res_buf[3];
	unsigned long start = get_timer(0);

	while (1) {
		ret = invoke_smc(INTEL_SIP_SMC_FPGA_CONFIG_ISDONE, NULL, 0,
				res_buf, ARRAY_SIZE(res_buf));

		if (error_status)
			*error_status = (uint32_t)res_buf[0];

		if (!ret)
			return 0;	/* configuration success */

		if (ret != INTEL_SIP_SMC_STATUS_BUSY)
			return ret;

		if (get_timer(start) > RECONFIG_STATUS_POLL_RESP_TIMEOUT_MS)
			return -ETIMEDOUT;	/* time out */

		puts(".");
		udelay(RECONFIG_STATUS_INTERVAL_DELAY_US);
		schedule();
	}

	return -ETIMEDOUT;
}

static int send_bitstream(const void *rbf_data, size_t rbf_size)
{
	int i;
	u64 res_buf[3];
	u64 args[2];
	u32 xfer_count = 0;
	int ret, wr_ret = 0, retry = 0;
	size_t buf_size = (rbf_size > BITSTREAM_CHUNK_SIZE) ?
				BITSTREAM_CHUNK_SIZE : rbf_size;

	while (rbf_size || xfer_count) {
		if (!wr_ret && rbf_size) {
			args[0] = (u64)rbf_data;
			args[1] = buf_size;
			wr_ret = invoke_smc(INTEL_SIP_SMC_FPGA_CONFIG_WRITE,
					    args, 2, NULL, 0);

			debug("wr_ret = %d, rbf_data = %p, buf_size = %08lx\n",
			      wr_ret, rbf_data, buf_size);

			if (wr_ret)
				continue;

			rbf_size -= buf_size;
			rbf_data += buf_size;

			if (buf_size >= rbf_size)
				buf_size = rbf_size;

			xfer_count++;
			puts(".");
		} else {
			ret = invoke_smc(
				INTEL_SIP_SMC_FPGA_CONFIG_COMPLETED_WRITE,
				NULL, 0, res_buf, ARRAY_SIZE(res_buf));
			if (!ret) {
				for (i = 0; i < ARRAY_SIZE(res_buf); i++) {
					if (!res_buf[i])
						break;
					xfer_count--;
					wr_ret = 0;
					retry = 0;
				}
			} else if (ret !=
				   INTEL_SIP_SMC_STATUS_BUSY)
				return ret;
			else if (!xfer_count)
				return INTEL_SIP_SMC_STATUS_ERROR;

			if (++retry >= RECONFIG_STATUS_POLL_RETRY_MAX)
				return -ETIMEDOUT;

			udelay(20000);
		}
		schedule();
	}

	return 0;
}

/*
 * This is the interface used by FPGA driver.
 * Return 0 for success, non-zero for error.
 */
int intel_sdm_mb_load(Altera_desc *desc, const void *rbf_data, size_t rbf_size)
{
	int ret;
	u64 arg = 1;
	u32 err_status = 0;
	u64 res_buf[3];
	struct mbox_err_msg err_msg;

	debug("Invoking FPGA_CONFIG_START...\n");

	ret = invoke_smc(INTEL_SIP_SMC_FPGA_CONFIG_START, &arg, 1, NULL, 0);

	if (ret) {
		puts("U-Boot SMC: Failure in RECONFIG mailbox command!\n");
		return ret;
	}

	ret = send_bitstream(rbf_data, rbf_size);
	if (ret) {
		puts("\nU-Boot SMC: Error sending bitstream!\n");
		ret = invoke_smc(INTEL_SIP_SMC_FPGA_CONFIG_ISDONE, NULL, 0,
				 res_buf, ARRAY_SIZE(res_buf));

		err_status = res_buf[0];
		mbox_cfgstat_to_str(err_status, &err_msg);
		printf("SDM: Config status: (0x%x)\nSDM Err: %s\n%s\n", err_status,
		       err_msg.major_err_str, err_msg.minor_err_str);

		return ret;
	}

	/* Make sure we don't send MBOX_RECONFIG_STATUS too fast */
	udelay(RECONFIG_STATUS_INTERVAL_DELAY_US);

	debug("U-Boot SMC: Polling with MBOX_RECONFIG_STATUS...\n");
	ret = reconfig_status_polling_resp(&err_status);
	if (ret) {
		printf("\nU-Boot SMC: FPGA reconfiguration failed!\n");
		mbox_cfgstat_to_str(err_status, &err_msg);
		printf("SDM: Config status: (0x%x)\nSDM Err:%s\n%s\n", err_status,
		       err_msg.major_err_str, err_msg.minor_err_str);

		return ret;
	}

	puts("FPGA reconfiguration OK!\n");

	return ret;
}

#else

static const struct mbox_cfgstat_state {
	int			err_no;
	const char		*error_name;
} mbox_cfgstat_state[] = {
	{MBOX_CFGSTAT_STATE_IDLE, "FPGA in idle mode."},
	{MBOX_CFGSTAT_STATE_CONFIG, "FPGA in config mode."},
	{MBOX_CFGSTAT_STATE_FAILACK, "Acknowledgment failed!"},
	{MBOX_CFGSTAT_STATE_ERROR_INVALID, "Invalid bitstream!"},
	{MBOX_CFGSTAT_STATE_ERROR_CORRUPT, "Corrupted bitstream!"},
	{MBOX_CFGSTAT_STATE_ERROR_AUTH, "Authentication failed!"},
	{MBOX_CFGSTAT_STATE_ERROR_CORE_IO, "I/O error!"},
	{MBOX_CFGSTAT_STATE_ERROR_HARDWARE, "Hardware error!"},
	{MBOX_CFGSTAT_STATE_ERROR_FAKE, "Fake error!"},
	{MBOX_CFGSTAT_STATE_ERROR_BOOT_INFO, "Error in boot info!"},
	{MBOX_CFGSTAT_STATE_ERROR_QSPI_ERROR, "Error in QSPI!"},
	{MBOX_RESP_ERROR, "Mailbox general error!"},
	{-ETIMEDOUT, "I/O timeout error"},
	{-1, "Unknown error!"}
};

#define MBOX_CFGSTAT_MAX ARRAY_SIZE(mbox_cfgstat_state)

static const char *mbox_cfgstat_to_str(int err)
{
	int i;

	for (i = 0; i < MBOX_CFGSTAT_MAX - 1; i++) {
		if (mbox_cfgstat_state[i].err_no == err)
			return mbox_cfgstat_state[i].error_name;
	}

	return mbox_cfgstat_state[MBOX_CFGSTAT_MAX - 1].error_name;
}

/*
 * Add the ongoing transaction's command ID into pending list and return
 * the command ID for next transfer.
 */
static u8 add_transfer(u32 *xfer_pending_list, size_t list_size, u8 id)
{
	int i;

	for (i = 0; i < list_size; i++) {
		if (xfer_pending_list[i])
			continue;
		xfer_pending_list[i] = id;
		debug("ID(%d) added to transaction pending list\n", id);
		/*
		 * Increment command ID for next transaction.
		 * Valid command ID (4 bits) is from 1 to 15.
		 */
		id = (id % 15) + 1;
		break;
	}

	return id;
}

/*
 * Check whether response ID match the command ID in the transfer
 * pending list. If a match is found in the transfer pending list,
 * it clears the transfer pending list and return the matched
 * command ID.
 */
static int get_and_clr_transfer(u32 *xfer_pending_list, size_t list_size,
				u8 id)
{
	int i;

	for (i = 0; i < list_size; i++) {
		if (id != xfer_pending_list[i])
			continue;
		xfer_pending_list[i] = 0;
		return id;
	}

	return 0;
}

/*
 * Polling the FPGA configuration status.
 * Return 0 for success, non-zero for error.
 */
static int reconfig_status_polling_resp(void)
{
	int ret;
	unsigned long start = get_timer(0);

	while (1) {
		ret = mbox_get_fpga_config_status(MBOX_RECONFIG_STATUS);
		if (!ret)
			return 0;	/* configuration success */

		if (ret != MBOX_CFGSTAT_STATE_CONFIG)
			return ret;

		if (get_timer(start) > RECONFIG_STATUS_POLL_RESP_TIMEOUT_MS)
			break;	/* time out */

		puts(".");
		udelay(RECONFIG_STATUS_INTERVAL_DELAY_US);
		schedule();
	}

	return -ETIMEDOUT;
}

static u32 get_resp_hdr(u32 *r_index, u32 *w_index, u32 *resp_count,
			u32 *resp_buf, u32 buf_size, u32 client_id)
{
	u32 buf[MBOX_RESP_BUFFER_SIZE];
	u32 mbox_hdr;
	u32 resp_len;
	u32 hdr_len;
	u32 i;

	if (*resp_count < buf_size) {
		u32 rcv_len_max = buf_size - *resp_count;

		if (rcv_len_max > MBOX_RESP_BUFFER_SIZE)
			rcv_len_max = MBOX_RESP_BUFFER_SIZE;
		resp_len = mbox_rcv_resp(buf, rcv_len_max);

		for (i = 0; i < resp_len; i++) {
			resp_buf[(*w_index)++] = buf[i];
			*w_index %= buf_size;
			(*resp_count)++;
		}
	}

	/* No response in buffer */
	if (*resp_count == 0)
		return 0;

	mbox_hdr = resp_buf[*r_index];

	hdr_len = MBOX_RESP_LEN_GET(mbox_hdr);

	/* Insufficient header length to return a mailbox header */
	if ((*resp_count - 1) < hdr_len)
		return 0;

	*r_index += (hdr_len + 1);
	*r_index %= buf_size;
	*resp_count -= (hdr_len + 1);

	/* Make sure response belongs to us */
	if (MBOX_RESP_CLIENT_GET(mbox_hdr) != client_id)
		return 0;

	return mbox_hdr;
}

/* Send bit stream data to SDM via RECONFIG_DATA mailbox command */
static int send_reconfig_data(const void *rbf_data, size_t rbf_size,
			      u32 xfer_max, u32 buf_size_max)
{
	u32 response_buffer[MBOX_RESP_BUFFER_SIZE];
	u32 xfer_pending[MBOX_RESP_BUFFER_SIZE];
	u32 resp_rindex = 0;
	u32 resp_windex = 0;
	u32 resp_count = 0;
	u32 xfer_count = 0;
	int resp_err = 0;
	u8 cmd_id = 1;
	u32 args[3];
	int ret;

	debug("SDM xfer_max = %d\n", xfer_max);
	debug("SDM buf_size_max = %x\n\n", buf_size_max);

	memset(xfer_pending, 0, sizeof(xfer_pending));

	while (rbf_size || xfer_count) {
		if (!resp_err && rbf_size && xfer_count < xfer_max) {
			args[0] = MBOX_ARG_DESC_COUNT(1);
			args[1] = (u64)rbf_data;
			if (rbf_size >= buf_size_max) {
				args[2] = buf_size_max;
				rbf_size -= buf_size_max;
				rbf_data += buf_size_max;
			} else {
				args[2] = (u64)rbf_size;
				rbf_size = 0;
			}

			resp_err = mbox_send_cmd_only(cmd_id, MBOX_RECONFIG_DATA,
						 MBOX_CMD_INDIRECT, 3, args);
			if (!resp_err) {
				xfer_count++;
				cmd_id = add_transfer(xfer_pending,
						      MBOX_RESP_BUFFER_SIZE,
						      cmd_id);
			}
			puts(".");
		} else {
			u32 resp_hdr = get_resp_hdr(&resp_rindex, &resp_windex,
						    &resp_count,
						    response_buffer,
						    MBOX_RESP_BUFFER_SIZE,
						    MBOX_CLIENT_ID_UBOOT);

			/*
			 * If no valid response header found or
			 * non-zero length from RECONFIG_DATA
			 */
			if (!resp_hdr || MBOX_RESP_LEN_GET(resp_hdr))
				continue;

			/* Check for response's status */
			if (!resp_err) {
				resp_err = MBOX_RESP_ERR_GET(resp_hdr);
				debug("Response error code: %08x\n", resp_err);
			}

			ret = get_and_clr_transfer(xfer_pending,
						   MBOX_RESP_BUFFER_SIZE,
						   MBOX_RESP_ID_GET(resp_hdr));
			if (ret) {
				/* Claim and reuse the ID */
				cmd_id = (u8)ret;
				xfer_count--;
			}

			if (resp_err && !xfer_count)
				return resp_err;
		}
		schedule();
	}

	return 0;
}

/*
 * This is the interface used by FPGA driver.
 * Return 0 for success, non-zero for error.
 */
int intel_sdm_mb_load(Altera_desc *desc, const void *rbf_data, size_t rbf_size)
{
	int ret;
	u32 resp_len = 2;
	u32 resp_buf[2];

	debug("Sending MBOX_RECONFIG...\n");
	ret = mbox_send_cmd(MBOX_ID_UBOOT, MBOX_RECONFIG, MBOX_CMD_DIRECT, 0,
			    NULL, 0, &resp_len, resp_buf);
	if (ret) {
		puts("Failure in RECONFIG mailbox command!\n");
		return ret;
	}

	ret = send_reconfig_data(rbf_data, rbf_size, resp_buf[0], resp_buf[1]);
	if (ret) {
		printf("RECONFIG_DATA error: %08x, %s\n", ret,
		       mbox_cfgstat_to_str(ret));
		return ret;
	}

	/* Make sure we don't send MBOX_RECONFIG_STATUS too fast */
	udelay(RECONFIG_STATUS_INTERVAL_DELAY_US);

	debug("Polling with MBOX_RECONFIG_STATUS...\n");
	ret = reconfig_status_polling_resp();
	if (ret) {
		printf("RECONFIG_STATUS Error: %08x, %s\n", ret,
		       mbox_cfgstat_to_str(ret));
		return ret;
	}

	puts("FPGA reconfiguration OK!\n");

	return ret;
}
#endif