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1/* SPDX-License-Identifier: GPL-2.0
2 *
3 * Copyright 2008-2013 Solarflare Communications Inc.
4 * Copyright (C) 2022-2025, Advanced Micro Devices, Inc.
5 */
6
7#ifndef CDX_MCDID_H
8#define CDX_MCDID_H
9
10#include <linux/mutex.h>
11#include <linux/kref.h>
12#include <linux/rpmsg.h>
13
14#include "mc_cdx_pcol.h"
15
16#ifdef DEBUG
17#define CDX_WARN_ON_ONCE_PARANOID(x) WARN_ON_ONCE(x)
18#define CDX_WARN_ON_PARANOID(x) WARN_ON(x)
19#else
20#define CDX_WARN_ON_ONCE_PARANOID(x) do {} while (0)
21#define CDX_WARN_ON_PARANOID(x) do {} while (0)
22#endif
23
24#define MCDI_BUF_LEN (8 + MCDI_CTL_SDU_LEN_MAX)
25
26static inline struct cdx_mcdi_iface *cdx_mcdi_if(struct cdx_mcdi *cdx)
27{
28 return cdx->mcdi ? &cdx->mcdi->iface : NULL;
29}
30
31int cdx_mcdi_rpc_async(struct cdx_mcdi *cdx, unsigned int cmd,
32 const struct cdx_dword *inbuf, size_t inlen,
33 cdx_mcdi_async_completer *complete,
34 unsigned long cookie);
35int cdx_mcdi_wait_for_quiescence(struct cdx_mcdi *cdx,
36 unsigned int timeout_jiffies);
37
38/*
39 * We expect that 16- and 32-bit fields in MCDI requests and responses
40 * are appropriately aligned, but 64-bit fields are only
41 * 32-bit-aligned.
42 */
43#define MCDI_BYTE(_buf, _field) \
44 ((void)BUILD_BUG_ON_ZERO(MC_CMD_ ## _field ## _LEN != 1), \
45 *MCDI_PTR(_buf, _field))
46#define MCDI_WORD(_buf, _field) \
47 ((void)BUILD_BUG_ON_ZERO(MC_CMD_ ## _field ## _LEN != 2), \
48 le16_to_cpu(*(__force const __le16 *)MCDI_PTR(_buf, _field)))
49#define MCDI_POPULATE_DWORD_1(_buf, _field, _name1, _value1) \
50 CDX_POPULATE_DWORD_1(*_MCDI_DWORD(_buf, _field), \
51 MC_CMD_ ## _name1, _value1)
52#define MCDI_SET_QWORD(_buf, _field, _value) \
53 do { \
54 CDX_POPULATE_DWORD_1(_MCDI_DWORD(_buf, _field)[0], \
55 CDX_DWORD, (u32)(_value)); \
56 CDX_POPULATE_DWORD_1(_MCDI_DWORD(_buf, _field)[1], \
57 CDX_DWORD, (u64)(_value) >> 32); \
58 } while (0)
59#define MCDI_QWORD(_buf, _field) \
60 (CDX_DWORD_FIELD(_MCDI_DWORD(_buf, _field)[0], CDX_DWORD) | \
61 (u64)CDX_DWORD_FIELD(_MCDI_DWORD(_buf, _field)[1], CDX_DWORD) << 32)
62
63#endif /* CDX_MCDID_H */