1*54fd6bd4SShubhrajyoti Datta /* SPDX-License-Identifier: GPL-2.0 2*54fd6bd4SShubhrajyoti Datta * 3*54fd6bd4SShubhrajyoti Datta * Copyright 2008-2013 Solarflare Communications Inc. 4*54fd6bd4SShubhrajyoti Datta * Copyright (C) 2022-2025, Advanced Micro Devices, Inc. 5*54fd6bd4SShubhrajyoti Datta */ 6*54fd6bd4SShubhrajyoti Datta 7*54fd6bd4SShubhrajyoti Datta #ifndef CDX_MCDID_H 8*54fd6bd4SShubhrajyoti Datta #define CDX_MCDID_H 9*54fd6bd4SShubhrajyoti Datta 10*54fd6bd4SShubhrajyoti Datta #include <linux/mutex.h> 11*54fd6bd4SShubhrajyoti Datta #include <linux/kref.h> 12*54fd6bd4SShubhrajyoti Datta #include <linux/rpmsg.h> 13*54fd6bd4SShubhrajyoti Datta 14*54fd6bd4SShubhrajyoti Datta #include "mc_cdx_pcol.h" 15*54fd6bd4SShubhrajyoti Datta 16*54fd6bd4SShubhrajyoti Datta #ifdef DEBUG 17*54fd6bd4SShubhrajyoti Datta #define CDX_WARN_ON_ONCE_PARANOID(x) WARN_ON_ONCE(x) 18*54fd6bd4SShubhrajyoti Datta #define CDX_WARN_ON_PARANOID(x) WARN_ON(x) 19*54fd6bd4SShubhrajyoti Datta #else 20*54fd6bd4SShubhrajyoti Datta #define CDX_WARN_ON_ONCE_PARANOID(x) do {} while (0) 21*54fd6bd4SShubhrajyoti Datta #define CDX_WARN_ON_PARANOID(x) do {} while (0) 22*54fd6bd4SShubhrajyoti Datta #endif 23*54fd6bd4SShubhrajyoti Datta 24*54fd6bd4SShubhrajyoti Datta #define MCDI_BUF_LEN (8 + MCDI_CTL_SDU_LEN_MAX) 25*54fd6bd4SShubhrajyoti Datta 26*54fd6bd4SShubhrajyoti Datta static inline struct cdx_mcdi_iface *cdx_mcdi_if(struct cdx_mcdi *cdx) 27*54fd6bd4SShubhrajyoti Datta { 28*54fd6bd4SShubhrajyoti Datta return cdx->mcdi ? &cdx->mcdi->iface : NULL; 29*54fd6bd4SShubhrajyoti Datta } 30*54fd6bd4SShubhrajyoti Datta 31*54fd6bd4SShubhrajyoti Datta int cdx_mcdi_rpc_async(struct cdx_mcdi *cdx, unsigned int cmd, 32*54fd6bd4SShubhrajyoti Datta const struct cdx_dword *inbuf, size_t inlen, 33*54fd6bd4SShubhrajyoti Datta cdx_mcdi_async_completer *complete, 34*54fd6bd4SShubhrajyoti Datta unsigned long cookie); 35*54fd6bd4SShubhrajyoti Datta int cdx_mcdi_wait_for_quiescence(struct cdx_mcdi *cdx, 36*54fd6bd4SShubhrajyoti Datta unsigned int timeout_jiffies); 37*54fd6bd4SShubhrajyoti Datta 38*54fd6bd4SShubhrajyoti Datta /* 39*54fd6bd4SShubhrajyoti Datta * We expect that 16- and 32-bit fields in MCDI requests and responses 40*54fd6bd4SShubhrajyoti Datta * are appropriately aligned, but 64-bit fields are only 41*54fd6bd4SShubhrajyoti Datta * 32-bit-aligned. 42*54fd6bd4SShubhrajyoti Datta */ 43*54fd6bd4SShubhrajyoti Datta #define MCDI_BYTE(_buf, _field) \ 44*54fd6bd4SShubhrajyoti Datta ((void)BUILD_BUG_ON_ZERO(MC_CMD_ ## _field ## _LEN != 1), \ 45*54fd6bd4SShubhrajyoti Datta *MCDI_PTR(_buf, _field)) 46*54fd6bd4SShubhrajyoti Datta #define MCDI_WORD(_buf, _field) \ 47*54fd6bd4SShubhrajyoti Datta ((void)BUILD_BUG_ON_ZERO(MC_CMD_ ## _field ## _LEN != 2), \ 48*54fd6bd4SShubhrajyoti Datta le16_to_cpu(*(__force const __le16 *)MCDI_PTR(_buf, _field))) 49*54fd6bd4SShubhrajyoti Datta #define MCDI_POPULATE_DWORD_1(_buf, _field, _name1, _value1) \ 50*54fd6bd4SShubhrajyoti Datta CDX_POPULATE_DWORD_1(*_MCDI_DWORD(_buf, _field), \ 51*54fd6bd4SShubhrajyoti Datta MC_CMD_ ## _name1, _value1) 52*54fd6bd4SShubhrajyoti Datta #define MCDI_SET_QWORD(_buf, _field, _value) \ 53*54fd6bd4SShubhrajyoti Datta do { \ 54*54fd6bd4SShubhrajyoti Datta CDX_POPULATE_DWORD_1(_MCDI_DWORD(_buf, _field)[0], \ 55*54fd6bd4SShubhrajyoti Datta CDX_DWORD, (u32)(_value)); \ 56*54fd6bd4SShubhrajyoti Datta CDX_POPULATE_DWORD_1(_MCDI_DWORD(_buf, _field)[1], \ 57*54fd6bd4SShubhrajyoti Datta CDX_DWORD, (u64)(_value) >> 32); \ 58*54fd6bd4SShubhrajyoti Datta } while (0) 59*54fd6bd4SShubhrajyoti Datta #define MCDI_QWORD(_buf, _field) \ 60*54fd6bd4SShubhrajyoti Datta (CDX_DWORD_FIELD(_MCDI_DWORD(_buf, _field)[0], CDX_DWORD) | \ 61*54fd6bd4SShubhrajyoti Datta (u64)CDX_DWORD_FIELD(_MCDI_DWORD(_buf, _field)[1], CDX_DWORD) << 32) 62*54fd6bd4SShubhrajyoti Datta 63*54fd6bd4SShubhrajyoti Datta #endif /* CDX_MCDID_H */ 64