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cdx: Split mcdi.h and reorganize headers

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Move bitfield.h from the CDX controller directory to include/linux/cdx to make
them accessible to other drivers.

As part of this refactoring, split mcdi.h into two headers:

- mcdi.h: retains interface-level declarations
- mcdid.h: contains internal definitions and macros

This is in preparation for VersalNET EDAC driver that relies on it.

Signed-off-by: Shubhrajyoti Datta <shubhrajyoti.datta@amd.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Acked-by: Nikhil Agarwal <nikhil.agarwal@amd.com>
Link: https://lore.kernel.org/20250908115649.22903-1-shubhrajyoti.datta@amd.com
This commit is contained in:
Shubhrajyoti Datta
2025-09-08 17:26:45 +05:30
committed by Borislav Petkov (AMD)
parent 2292c8061c
commit 54fd6bd42e
8 changed files with 71 additions and 57 deletions
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63
drivers/cdx/controller/mcdid.h Normal file
View File

@@ -0,0 +1,63 @@
/* SPDX-License-Identifier: GPL-2.0
*
* Copyright 2008-2013 Solarflare Communications Inc.
* Copyright (C) 2022-2025, Advanced Micro Devices, Inc.
*/
#ifndef CDX_MCDID_H
#define CDX_MCDID_H
#include <linux/mutex.h>
#include <linux/kref.h>
#include <linux/rpmsg.h>
#include "mc_cdx_pcol.h"
#ifdef DEBUG
#define CDX_WARN_ON_ONCE_PARANOID(x) WARN_ON_ONCE(x)
#define CDX_WARN_ON_PARANOID(x) WARN_ON(x)
#else
#define CDX_WARN_ON_ONCE_PARANOID(x) do {} while (0)
#define CDX_WARN_ON_PARANOID(x) do {} while (0)
#endif
#define MCDI_BUF_LEN (8 + MCDI_CTL_SDU_LEN_MAX)
static inline struct cdx_mcdi_iface *cdx_mcdi_if(struct cdx_mcdi *cdx)
{
return cdx->mcdi ? &cdx->mcdi->iface : NULL;
}
int cdx_mcdi_rpc_async(struct cdx_mcdi *cdx, unsigned int cmd,
const struct cdx_dword *inbuf, size_t inlen,
cdx_mcdi_async_completer *complete,
unsigned long cookie);
int cdx_mcdi_wait_for_quiescence(struct cdx_mcdi *cdx,
unsigned int timeout_jiffies);
/*
* We expect that 16- and 32-bit fields in MCDI requests and responses
* are appropriately aligned, but 64-bit fields are only
* 32-bit-aligned.
*/
#define MCDI_BYTE(_buf, _field) \
((void)BUILD_BUG_ON_ZERO(MC_CMD_ ## _field ## _LEN != 1), \
*MCDI_PTR(_buf, _field))
#define MCDI_WORD(_buf, _field) \
((void)BUILD_BUG_ON_ZERO(MC_CMD_ ## _field ## _LEN != 2), \
le16_to_cpu(*(__force const __le16 *)MCDI_PTR(_buf, _field)))
#define MCDI_POPULATE_DWORD_1(_buf, _field, _name1, _value1) \
CDX_POPULATE_DWORD_1(*_MCDI_DWORD(_buf, _field), \
MC_CMD_ ## _name1, _value1)
#define MCDI_SET_QWORD(_buf, _field, _value) \
do { \
CDX_POPULATE_DWORD_1(_MCDI_DWORD(_buf, _field)[0], \
CDX_DWORD, (u32)(_value)); \
CDX_POPULATE_DWORD_1(_MCDI_DWORD(_buf, _field)[1], \
CDX_DWORD, (u64)(_value) >> 32); \
} while (0)
#define MCDI_QWORD(_buf, _field) \
(CDX_DWORD_FIELD(_MCDI_DWORD(_buf, _field)[0], CDX_DWORD) | \
(u64)CDX_DWORD_FIELD(_MCDI_DWORD(_buf, _field)[1], CDX_DWORD) << 32)
#endif /* CDX_MCDID_H */