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 26 static inline struct cdx_mcdi_iface *cdx_mcdi_if(struct cdx_mcdi *cdx) 27 { 28 return cdx->mcdi ? &cdx->mcdi->iface : NULL; 29 } 30 31 int 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); 35 int 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 */ 64