| 1 | /* SPDX-License-Identifier: GPL-2.0 |
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| 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 | /* |
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| 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 /* CDX_MCDID_H */ |
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| 64 | |
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