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