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torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/drivers/cdx/controller/mcdid.h
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/* SPDX-License-Identifier: GPL-2.0

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 *

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 * Copyright 2008-2013 Solarflare Communications Inc.

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 * Copyright (C) 2022-2025, Advanced Micro Devices, Inc.

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 */

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#ifndef CDX_MCDID_H

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#define CDX_MCDID_H

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#include <linux/mutex.h>

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#include <linux/kref.h>

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#include <linux/rpmsg.h>

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#include "mc_cdx_pcol.h"

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#ifdef DEBUG

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#define CDX_WARN_ON_ONCE_PARANOID(x) WARN_ON_ONCE(x)

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#define CDX_WARN_ON_PARANOID(x) WARN_ON(x)

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#else

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#define CDX_WARN_ON_ONCE_PARANOID(x) do {} while (0)

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#define CDX_WARN_ON_PARANOID(x) do {} while (0)

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#endif

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#define MCDI_BUF_LEN (8 + MCDI_CTL_SDU_LEN_MAX)

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static inline struct cdx_mcdi_iface *cdx_mcdi_if(struct cdx_mcdi *cdx)

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{

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	return cdx->mcdi ? &cdx->mcdi->iface : NULL;

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}

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int cdx_mcdi_rpc_async(struct cdx_mcdi *cdx, unsigned int cmd,

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		       const struct cdx_dword *inbuf, size_t inlen,

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		       cdx_mcdi_async_completer *complete,

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		       unsigned long cookie);

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int cdx_mcdi_wait_for_quiescence(struct cdx_mcdi *cdx,

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				 unsigned int timeout_jiffies);

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/*

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 * We expect that 16- and 32-bit fields in MCDI requests and responses

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 * are appropriately aligned, but 64-bit fields are only

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 * 32-bit-aligned.

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 */

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#define MCDI_BYTE(_buf, _field)						\

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	((void)BUILD_BUG_ON_ZERO(MC_CMD_ ## _field ## _LEN != 1),	\

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	 *MCDI_PTR(_buf, _field))

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#define MCDI_WORD(_buf, _field)						\

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	((void)BUILD_BUG_ON_ZERO(MC_CMD_ ## _field ## _LEN != 2),	\

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	 le16_to_cpu(*(__force const __le16 *)MCDI_PTR(_buf, _field)))

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#define MCDI_POPULATE_DWORD_1(_buf, _field, _name1, _value1)		\

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	CDX_POPULATE_DWORD_1(*_MCDI_DWORD(_buf, _field),		\

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			     MC_CMD_ ## _name1, _value1)

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#define MCDI_SET_QWORD(_buf, _field, _value)				\

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	do {								\

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		CDX_POPULATE_DWORD_1(_MCDI_DWORD(_buf, _field)[0],	\

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				     CDX_DWORD, (u32)(_value));	\

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		CDX_POPULATE_DWORD_1(_MCDI_DWORD(_buf, _field)[1],	\

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				     CDX_DWORD, (u64)(_value) >> 32);	\

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	} while (0)

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#define MCDI_QWORD(_buf, _field)					\

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	(CDX_DWORD_FIELD(_MCDI_DWORD(_buf, _field)[0], CDX_DWORD) |	\

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	(u64)CDX_DWORD_FIELD(_MCDI_DWORD(_buf, _field)[1], CDX_DWORD) << 32)

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#endif /* CDX_MCDID_H */

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