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/* SPDX-License-Identifier: BSD-3-Clause
* Copyright(c) 2018 Netronome Systems, Inc.
* All rights reserved.
*/
#ifndef __NFP_HWINFO_H__
#define __NFP_HWINFO_H__
#include <inttypes.h>
#define HWINFO_SIZE_MIN 0x100
/*
* The Hardware Info Table defines the properties of the system.
*
* HWInfo v1 Table (fixed size)
*
* 0x0000: uint32_t version Hardware Info Table version (1.0)
* 0x0004: uint32_t size Total size of the table, including the
* CRC32 (IEEE 802.3)
* 0x0008: uint32_t jumptab Offset of key/value table
* 0x000c: uint32_t keys Total number of keys in the key/value
* table
* NNNNNN: Key/value jump table and string data
* (size - 4): uint32_t crc32 CRC32 (same as IEEE 802.3, POSIX csum, etc)
* CRC32("",0) = ~0, CRC32("a",1) = 0x48C279FE
*
* HWInfo v2 Table (variable size)
*
* 0x0000: uint32_t version Hardware Info Table version (2.0)
* 0x0004: uint32_t size Current size of the data area, excluding
* CRC32
* 0x0008: uint32_t limit Maximum size of the table
* 0x000c: uint32_t reserved Unused, set to zero
* NNNNNN: Key/value data
* (size - 4): uint32_t crc32 CRC32 (same as IEEE 802.3, POSIX csum, etc)
* CRC32("",0) = ~0, CRC32("a",1) = 0x48C279FE
*
* If the HWInfo table is in the process of being updated, the low bit of
* version will be set.
*
* HWInfo v1 Key/Value Table
* -------------------------
*
* The key/value table is a set of offsets to ASCIIZ strings which have
* been strcmp(3) sorted (yes, please use bsearch(3) on the table).
*
* All keys are guaranteed to be unique.
*
* N+0: uint32_t key_1 Offset to the first key
* N+4: uint32_t val_1 Offset to the first value
* N+8: uint32_t key_2 Offset to the second key
* N+c: uint32_t val_2 Offset to the second value
* ...
*
* HWInfo v2 Key/Value Table
* -------------------------
*
* Packed UTF8Z strings, ie 'key1\000value1\000key2\000value2\000'
*
* Unsorted.
*/
#define NFP_HWINFO_VERSION_1 ('H' << 24 | 'I' << 16 | 1 << 8 | 0 << 1 | 0)
#define NFP_HWINFO_VERSION_2 ('H' << 24 | 'I' << 16 | 2 << 8 | 0 << 1 | 0)
#define NFP_HWINFO_VERSION_UPDATING BIT(0)
struct nfp_hwinfo {
uint8_t start[0];
uint32_t version;
uint32_t size;
/* v2 specific fields */
uint32_t limit;
uint32_t resv;
char data[];
};
struct nfp_hwinfo *nfp_hwinfo_read(struct nfp_cpp *cpp);
const char *nfp_hwinfo_lookup(struct nfp_hwinfo *hwinfo, const char *lookup);
#endif
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