From f0f86d39fec73479d4904e6d5b9db01a29597d58 Mon Sep 17 00:00:00 2001 From: Algapally Santosh Sagar Date: Wed, 25 Jan 2023 13:06:21 +0100 Subject: [PATCH] fru: ops: Display FRU fields properly for 0xc1 fields FRU data is not displayed properly in case of 0xc1 fields. The 0xC1 can be used in two cases. 1. Char record type 8-bit ASCII + Latin 1 with length of 1. (For example board revision 'A') 2. C1h (type/length byte encoded to indicate no more info fields). which can follow by 00h to fill all remaining unused space Hence removed the check end-of-the field c1 to allow c1 fields. "ASCII+LATIN1" is defined as the printable characters from the first set of 256 characters of Unicode 6.2 (U+0000h through U+00FFh, inclusive) expressed as an eight-bit value. (Unicode follows ISO/IEC 8859-1 in the layout of printable characters up to U+00FFh). So, print only printable chars and limit range from 0x20 ' ' to 0x7e '-' which will be also indication if 0xc1 behaves as record with one char or end of record. Signed-off-by: Algapally Santosh Sagar Signed-off-by: Michal Simek Link: https://lore.kernel.org/r/4198d73de600627872c80a5b07e5068502c589d7.1674648379.git.michal.simek@amd.com --- board/xilinx/common/fru_ops.c | 43 +++++++++++++++++++++++------------ 1 file changed, 28 insertions(+), 15 deletions(-) diff --git a/board/xilinx/common/fru_ops.c b/board/xilinx/common/fru_ops.c index c4f009affc..167252c240 100644 --- a/board/xilinx/common/fru_ops.c +++ b/board/xilinx/common/fru_ops.c @@ -1,6 +1,7 @@ // SPDX-License-Identifier: GPL-2.0 /* - * (C) Copyright 2019 - 2020 Xilinx, Inc. + * (C) Copyright 2019 - 2022, Xilinx, Inc. + * (C) Copyright 2022 - 2023, Advanced Micro Devices, Inc. */ #include @@ -61,9 +62,6 @@ static int fru_check_type_len(u8 type_len, u8 language, u8 *type) { int len; - if (type_len == FRU_TYPELEN_EOF) - return -EINVAL; - *type = (type_len & FRU_TYPELEN_CODE_MASK) >> FRU_TYPELEN_TYPE_SHIFT; len = type_len & FRU_TYPELEN_LEN_MASK; @@ -172,9 +170,16 @@ static int fru_parse_board(unsigned long addr) { u8 i, type; int len; - u8 *data, *term, *limit; + u8 *data, *term, *limit, *next_addr, *eof; memcpy(&fru_data.brd.ver, (void *)addr, 6); + + /* + * eof marks the last data byte (without checksum). That's why checksum + * is address length - 1 and last data byte is length - 2. + */ + eof = (u8 *)(fru_data.brd.len * 8 + addr - 2); + addr += 6; data = (u8 *)&fru_data.brd.manufacturer_type_len; @@ -184,10 +189,21 @@ static int fru_parse_board(unsigned long addr) for (i = 0; ; i++, data += FRU_BOARD_MAX_LEN) { len = fru_check_type_len(*(u8 *)addr, fru_data.brd.lang_code, &type); + next_addr = (u8 *)addr + 1; + + if ((u8 *)addr >= eof) { + debug("Reach EOF record: addr %lx, eof %lx\n", addr, + (unsigned long)eof); + break; + } + /* - * Stop cature if it end of fields + * Stop capture if the type is ASCII and valid field length + * is 1 (0xc1) and next FRU data is less than 0x20 (space " ") + * or it is 0x7f (delete 'DEL'). */ - if (len == -EINVAL) + if (type == FRU_TYPELEN_TYPE_ASCII8 && len == 1 && + (*next_addr < 0x20 || *next_addr == 0x7F)) break; /* Stop when amount of chars is more then fields to record */ @@ -332,9 +348,11 @@ static int fru_display_board(struct fru_board_data *brd, int verbose) for (u8 i = 0; i < (sizeof(boardinfo) / sizeof(*boardinfo)); i++) { len = fru_check_type_len(*data++, brd->lang_code, &type); - if (len == -EINVAL) { - printf("**** EOF for Board Area ****\n"); - break; + + /* Empty record has no len/type filled */ + if (!len) { + debug("%s not found\n", boardinfo[i]); + continue; } if (type <= FRU_TYPELEN_TYPE_ASCII8 && @@ -344,11 +362,6 @@ static int fru_display_board(struct fru_board_data *brd, int verbose) else debug("Type code: %s\n", typecode[type + 1]); - if (!len) { - debug("%s not found\n", boardinfo[i]); - continue; - } - switch (type) { case FRU_TYPELEN_TYPE_BINARY: debug("Length: %d\n", len); -- 2.39.5