// SPDX-License-Identifier: GPL-2.0/* * Copyright (C) 2022-2023, Advanced Micro Devices, Inc. */ #include <linux/module.h> #include "mcdi.h"#include "mcdi_functions.h" int cdx_mcdi_get_num_buses(struct cdx_mcdi *cdx){	MCDI_DECLARE_BUF(outbuf, MC_CMD_CDX_BUS_ENUM_BUSES_OUT_LEN);	size_t outlen;	int ret; 	ret = cdx_mcdi_rpc(cdx, MC_CMD_CDX_BUS_ENUM_BUSES, NULL, 0,			   outbuf, sizeof(outbuf), &outlen);	if (ret)		return ret; 	if (outlen != MC_CMD_CDX_BUS_ENUM_BUSES_OUT_LEN)		return -EIO; 	return MCDI_DWORD(outbuf, CDX_BUS_ENUM_BUSES_OUT_BUS_COUNT);} int cdx_mcdi_get_num_devs(struct cdx_mcdi *cdx, int bus_num){	MCDI_DECLARE_BUF(outbuf, MC_CMD_CDX_BUS_ENUM_DEVICES_OUT_LEN);	MCDI_DECLARE_BUF(inbuf, MC_CMD_CDX_BUS_ENUM_DEVICES_IN_LEN);	size_t outlen;	int ret; 	MCDI_SET_DWORD(inbuf, CDX_BUS_ENUM_DEVICES_IN_BUS, bus_num); 	ret = cdx_mcdi_rpc(cdx, MC_CMD_CDX_BUS_ENUM_DEVICES, inbuf, sizeof(inbuf),			   outbuf, sizeof(outbuf), &outlen);	if (ret)		return ret; 	if (outlen != MC_CMD_CDX_BUS_ENUM_DEVICES_OUT_LEN)		return -EIO; 	return MCDI_DWORD(outbuf, CDX_BUS_ENUM_DEVICES_OUT_DEVICE_COUNT);} int cdx_mcdi_get_dev_config(struct cdx_mcdi *cdx,			    u8 bus_num, u8 dev_num,			    struct cdx_dev_params *dev_params){	MCDI_DECLARE_BUF(outbuf, MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT_V2_LEN);	MCDI_DECLARE_BUF(inbuf, MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_IN_LEN);	struct resource *res = &dev_params->res[0];	size_t outlen;	u32 req_id;	int ret; 	MCDI_SET_DWORD(inbuf, CDX_BUS_GET_DEVICE_CONFIG_IN_BUS, bus_num);	MCDI_SET_DWORD(inbuf, CDX_BUS_GET_DEVICE_CONFIG_IN_DEVICE, dev_num); 	ret = cdx_mcdi_rpc(cdx, MC_CMD_CDX_BUS_GET_DEVICE_CONFIG, inbuf, sizeof(inbuf),			   outbuf, sizeof(outbuf), &outlen);	if (ret)		return ret; 	if (outlen != MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT_V2_LEN)		return -EIO; 	dev_params->bus_num = bus_num;	dev_params->dev_num = dev_num; 	req_id = MCDI_DWORD(outbuf, CDX_BUS_GET_DEVICE_CONFIG_OUT_REQUESTER_ID);	dev_params->req_id = req_id; 	dev_params->msi_dev_id = MCDI_DWORD(outbuf,					    CDX_BUS_GET_DEVICE_CONFIG_OUT_V2_REQUESTER_DEVICE_ID); 	dev_params->res_count = 0;	if (MCDI_QWORD(outbuf, CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION0_SIZE) != 0) {		res[dev_params->res_count].start =			MCDI_QWORD(outbuf, CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION0_BASE);		res[dev_params->res_count].end =			MCDI_QWORD(outbuf, CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION0_BASE) +				   MCDI_QWORD(outbuf,					      CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION0_SIZE) - 1;		res[dev_params->res_count].flags = IORESOURCE_MEM;		dev_params->res_count++;	} 	if (MCDI_QWORD(outbuf, CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION1_SIZE) != 0) {		res[dev_params->res_count].start =			MCDI_QWORD(outbuf, CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION1_BASE);		res[dev_params->res_count].end =			MCDI_QWORD(outbuf, CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION1_BASE) +				   MCDI_QWORD(outbuf,					      CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION1_SIZE) - 1;		res[dev_params->res_count].flags = IORESOURCE_MEM;		dev_params->res_count++;	} 	if (MCDI_QWORD(outbuf, CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION2_SIZE) != 0) {		res[dev_params->res_count].start =			MCDI_QWORD(outbuf, CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION2_BASE);		res[dev_params->res_count].end =			MCDI_QWORD(outbuf, CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION2_BASE) +				   MCDI_QWORD(outbuf,					      CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION2_SIZE) - 1;		res[dev_params->res_count].flags = IORESOURCE_MEM;		dev_params->res_count++;	} 	if (MCDI_QWORD(outbuf, CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION3_SIZE) != 0) {		res[dev_params->res_count].start =			MCDI_QWORD(outbuf, CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION3_BASE);		res[dev_params->res_count].end =			MCDI_QWORD(outbuf, CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION3_BASE) +				   MCDI_QWORD(outbuf,					      CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION3_SIZE) - 1;		res[dev_params->res_count].flags = IORESOURCE_MEM;		dev_params->res_count++;	} 	dev_params->vendor = MCDI_WORD(outbuf, CDX_BUS_GET_DEVICE_CONFIG_OUT_VENDOR_ID);	dev_params->device = MCDI_WORD(outbuf, CDX_BUS_GET_DEVICE_CONFIG_OUT_DEVICE_ID);	dev_params->subsys_vendor = MCDI_WORD(outbuf,					      CDX_BUS_GET_DEVICE_CONFIG_OUT_SUBSYS_VENDOR_ID);	dev_params->subsys_device = MCDI_WORD(outbuf,					      CDX_BUS_GET_DEVICE_CONFIG_OUT_SUBSYS_DEVICE_ID);	dev_params->class = MCDI_DWORD(outbuf,				       CDX_BUS_GET_DEVICE_CONFIG_OUT_DEVICE_CLASS) & 0xFFFFFF;	dev_params->revision = MCDI_BYTE(outbuf, CDX_BUS_GET_DEVICE_CONFIG_OUT_DEVICE_REVISION);	dev_params->num_msi = MCDI_DWORD(outbuf, CDX_BUS_GET_DEVICE_CONFIG_OUT_MSI_COUNT); 	return 0;} int cdx_mcdi_bus_enable(struct cdx_mcdi *cdx, u8 bus_num){	MCDI_DECLARE_BUF(inbuf, MC_CMD_CDX_BUS_UP_IN_LEN);	int ret; 	MCDI_SET_DWORD(inbuf, CDX_BUS_UP_IN_BUS, bus_num);	ret = cdx_mcdi_rpc(cdx, MC_CMD_CDX_BUS_UP, inbuf, sizeof(inbuf),			   NULL, 0, NULL); 	return ret;} int cdx_mcdi_bus_disable(struct cdx_mcdi *cdx, u8 bus_num){	MCDI_DECLARE_BUF(inbuf, MC_CMD_CDX_BUS_DOWN_IN_LEN);	int ret; 	MCDI_SET_DWORD(inbuf, CDX_BUS_DOWN_IN_BUS, bus_num);	ret = cdx_mcdi_rpc(cdx, MC_CMD_CDX_BUS_DOWN, inbuf, sizeof(inbuf),			   NULL, 0, NULL); 	return ret;} int cdx_mcdi_write_msi(struct cdx_mcdi *cdx, u8 bus_num, u8 dev_num,		       u32 msi_vector, u64 msi_address, u32 msi_data){	MCDI_DECLARE_BUF(inbuf, MC_CMD_CDX_DEVICE_WRITE_MSI_MSG_IN_LEN);	int ret; 	MCDI_SET_DWORD(inbuf, CDX_DEVICE_WRITE_MSI_MSG_IN_BUS, bus_num);	MCDI_SET_DWORD(inbuf, CDX_DEVICE_WRITE_MSI_MSG_IN_DEVICE, dev_num);	MCDI_SET_DWORD(inbuf, CDX_DEVICE_WRITE_MSI_MSG_IN_MSI_VECTOR, msi_vector);	MCDI_SET_QWORD(inbuf, CDX_DEVICE_WRITE_MSI_MSG_IN_MSI_ADDRESS, msi_address);	MCDI_SET_DWORD(inbuf, CDX_DEVICE_WRITE_MSI_MSG_IN_MSI_DATA, msi_data); 	ret = cdx_mcdi_rpc(cdx, MC_CMD_CDX_DEVICE_WRITE_MSI_MSG, inbuf, sizeof(inbuf),			   NULL, 0, NULL); 	return ret;} int cdx_mcdi_reset_device(struct cdx_mcdi *cdx, u8 bus_num, u8 dev_num){	MCDI_DECLARE_BUF(inbuf, MC_CMD_CDX_DEVICE_RESET_IN_LEN);	int ret; 	MCDI_SET_DWORD(inbuf, CDX_DEVICE_RESET_IN_BUS, bus_num);	MCDI_SET_DWORD(inbuf, CDX_DEVICE_RESET_IN_DEVICE, dev_num); 	ret = cdx_mcdi_rpc(cdx, MC_CMD_CDX_DEVICE_RESET, inbuf, sizeof(inbuf),			   NULL, 0, NULL); 	return ret;} static int cdx_mcdi_ctrl_flag_get(struct cdx_mcdi *cdx, u8 bus_num,				  u8 dev_num, u32 *flags){	MCDI_DECLARE_BUF(inbuf, MC_CMD_CDX_DEVICE_CONTROL_GET_IN_LEN);	MCDI_DECLARE_BUF(outbuf, MC_CMD_CDX_DEVICE_CONTROL_GET_OUT_LEN);	size_t outlen;	int ret; 	MCDI_SET_DWORD(inbuf, CDX_DEVICE_CONTROL_GET_IN_BUS, bus_num);	MCDI_SET_DWORD(inbuf, CDX_DEVICE_CONTROL_GET_IN_DEVICE, dev_num);	ret = cdx_mcdi_rpc(cdx, MC_CMD_CDX_DEVICE_CONTROL_GET, inbuf,			   sizeof(inbuf), outbuf, sizeof(outbuf), &outlen);	if (ret)		return ret; 	if (outlen != MC_CMD_CDX_DEVICE_CONTROL_GET_OUT_LEN)		return -EIO; 	*flags = MCDI_DWORD(outbuf, CDX_DEVICE_CONTROL_GET_OUT_FLAGS); 	return 0;} static int cdx_mcdi_ctrl_flag_set(struct cdx_mcdi *cdx, u8 bus_num,				  u8 dev_num, bool enable, int bit_pos){	MCDI_DECLARE_BUF(inbuf, MC_CMD_CDX_DEVICE_CONTROL_SET_IN_LEN);	u32 flags;	int ret; 	/*	 * Get flags and then set/reset bit at bit_pos according to	 * the input params.	 */	ret = cdx_mcdi_ctrl_flag_get(cdx, bus_num, dev_num, &flags);	if (ret)		return ret; 	flags = flags & (u32)(~(BIT(bit_pos)));	if (enable)		flags |= (1 << bit_pos); 	MCDI_SET_DWORD(inbuf, CDX_DEVICE_CONTROL_SET_IN_BUS, bus_num);	MCDI_SET_DWORD(inbuf, CDX_DEVICE_CONTROL_SET_IN_DEVICE, dev_num);	MCDI_SET_DWORD(inbuf, CDX_DEVICE_CONTROL_SET_IN_FLAGS, flags);	ret = cdx_mcdi_rpc(cdx, MC_CMD_CDX_DEVICE_CONTROL_SET, inbuf,			   sizeof(inbuf), NULL, 0, NULL); 	return ret;} int cdx_mcdi_bus_master_enable(struct cdx_mcdi *cdx, u8 bus_num,			       u8 dev_num, bool enable){	return cdx_mcdi_ctrl_flag_set(cdx, bus_num, dev_num, enable,			MC_CMD_CDX_DEVICE_CONTROL_SET_IN_BUS_MASTER_ENABLE_LBN);} int cdx_mcdi_msi_enable(struct cdx_mcdi *cdx, u8 bus_num,			u8 dev_num, bool enable){	return cdx_mcdi_ctrl_flag_set(cdx, bus_num, dev_num, enable,			MC_CMD_CDX_DEVICE_CONTROL_SET_IN_MSI_ENABLE_LBN);}