1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Copyright (C) 2022-2023, Advanced Micro Devices, Inc. 4 */ 5 6 #include <linux/module.h> 7 8 #include "mcdi.h" 9 #include "mcdi_functions.h" 10 11 int cdx_mcdi_get_num_buses(struct cdx_mcdi *cdx) 12 { 13 MCDI_DECLARE_BUF(outbuf, MC_CMD_CDX_BUS_ENUM_BUSES_OUT_LEN); 14 size_t outlen; 15 int ret; 16 17 ret = cdx_mcdi_rpc(cdx, MC_CMD_CDX_BUS_ENUM_BUSES, NULL, 0, 18 outbuf, sizeof(outbuf), &outlen); 19 if (ret) 20 return ret; 21 22 if (outlen != MC_CMD_CDX_BUS_ENUM_BUSES_OUT_LEN) 23 return -EIO; 24 25 return MCDI_DWORD(outbuf, CDX_BUS_ENUM_BUSES_OUT_BUS_COUNT); 26 } 27 28 int cdx_mcdi_get_num_devs(struct cdx_mcdi *cdx, int bus_num) 29 { 30 MCDI_DECLARE_BUF(outbuf, MC_CMD_CDX_BUS_ENUM_DEVICES_OUT_LEN); 31 MCDI_DECLARE_BUF(inbuf, MC_CMD_CDX_BUS_ENUM_DEVICES_IN_LEN); 32 size_t outlen; 33 int ret; 34 35 MCDI_SET_DWORD(inbuf, CDX_BUS_ENUM_DEVICES_IN_BUS, bus_num); 36 37 ret = cdx_mcdi_rpc(cdx, MC_CMD_CDX_BUS_ENUM_DEVICES, inbuf, sizeof(inbuf), 38 outbuf, sizeof(outbuf), &outlen); 39 if (ret) 40 return ret; 41 42 if (outlen != MC_CMD_CDX_BUS_ENUM_DEVICES_OUT_LEN) 43 return -EIO; 44 45 return MCDI_DWORD(outbuf, CDX_BUS_ENUM_DEVICES_OUT_DEVICE_COUNT); 46 } 47 48 int cdx_mcdi_get_dev_config(struct cdx_mcdi *cdx, 49 u8 bus_num, u8 dev_num, 50 struct cdx_dev_params *dev_params) 51 { 52 MCDI_DECLARE_BUF(outbuf, MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT_LEN); 53 MCDI_DECLARE_BUF(inbuf, MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_IN_LEN); 54 struct resource *res = &dev_params->res[0]; 55 size_t outlen; 56 u32 req_id; 57 int ret; 58 59 MCDI_SET_DWORD(inbuf, CDX_BUS_GET_DEVICE_CONFIG_IN_BUS, bus_num); 60 MCDI_SET_DWORD(inbuf, CDX_BUS_GET_DEVICE_CONFIG_IN_DEVICE, dev_num); 61 62 ret = cdx_mcdi_rpc(cdx, MC_CMD_CDX_BUS_GET_DEVICE_CONFIG, inbuf, sizeof(inbuf), 63 outbuf, sizeof(outbuf), &outlen); 64 if (ret) 65 return ret; 66 67 if (outlen != MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT_LEN) 68 return -EIO; 69 70 dev_params->bus_num = bus_num; 71 dev_params->dev_num = dev_num; 72 73 req_id = MCDI_DWORD(outbuf, CDX_BUS_GET_DEVICE_CONFIG_OUT_REQUESTER_ID); 74 dev_params->req_id = req_id; 75 76 dev_params->res_count = 0; 77 if (MCDI_QWORD(outbuf, CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION0_SIZE) != 0) { 78 res[dev_params->res_count].start = 79 MCDI_QWORD(outbuf, CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION0_BASE); 80 res[dev_params->res_count].end = 81 MCDI_QWORD(outbuf, CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION0_BASE) + 82 MCDI_QWORD(outbuf, 83 CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION0_SIZE) - 1; 84 res[dev_params->res_count].flags = IORESOURCE_MEM; 85 dev_params->res_count++; 86 } 87 88 if (MCDI_QWORD(outbuf, CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION1_SIZE) != 0) { 89 res[dev_params->res_count].start = 90 MCDI_QWORD(outbuf, CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION1_BASE); 91 res[dev_params->res_count].end = 92 MCDI_QWORD(outbuf, CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION1_BASE) + 93 MCDI_QWORD(outbuf, 94 CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION1_SIZE) - 1; 95 res[dev_params->res_count].flags = IORESOURCE_MEM; 96 dev_params->res_count++; 97 } 98 99 if (MCDI_QWORD(outbuf, CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION2_SIZE) != 0) { 100 res[dev_params->res_count].start = 101 MCDI_QWORD(outbuf, CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION2_BASE); 102 res[dev_params->res_count].end = 103 MCDI_QWORD(outbuf, CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION2_BASE) + 104 MCDI_QWORD(outbuf, 105 CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION2_SIZE) - 1; 106 res[dev_params->res_count].flags = IORESOURCE_MEM; 107 dev_params->res_count++; 108 } 109 110 if (MCDI_QWORD(outbuf, CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION3_SIZE) != 0) { 111 res[dev_params->res_count].start = 112 MCDI_QWORD(outbuf, CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION3_BASE); 113 res[dev_params->res_count].end = 114 MCDI_QWORD(outbuf, CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION3_BASE) + 115 MCDI_QWORD(outbuf, 116 CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION3_SIZE) - 1; 117 res[dev_params->res_count].flags = IORESOURCE_MEM; 118 dev_params->res_count++; 119 } 120 121 dev_params->vendor = MCDI_WORD(outbuf, CDX_BUS_GET_DEVICE_CONFIG_OUT_VENDOR_ID); 122 dev_params->device = MCDI_WORD(outbuf, CDX_BUS_GET_DEVICE_CONFIG_OUT_DEVICE_ID); 123 124 return 0; 125 } 126 127 int cdx_mcdi_reset_device(struct cdx_mcdi *cdx, u8 bus_num, u8 dev_num) 128 { 129 MCDI_DECLARE_BUF(inbuf, MC_CMD_CDX_DEVICE_RESET_IN_LEN); 130 int ret; 131 132 MCDI_SET_DWORD(inbuf, CDX_DEVICE_RESET_IN_BUS, bus_num); 133 MCDI_SET_DWORD(inbuf, CDX_DEVICE_RESET_IN_DEVICE, dev_num); 134 135 ret = cdx_mcdi_rpc(cdx, MC_CMD_CDX_DEVICE_RESET, inbuf, sizeof(inbuf), 136 NULL, 0, NULL); 137 138 return ret; 139 } 140 141 static int cdx_mcdi_ctrl_flag_get(struct cdx_mcdi *cdx, u8 bus_num, 142 u8 dev_num, u32 *flags) 143 { 144 MCDI_DECLARE_BUF(inbuf, MC_CMD_CDX_DEVICE_CONTROL_GET_IN_LEN); 145 MCDI_DECLARE_BUF(outbuf, MC_CMD_CDX_DEVICE_CONTROL_GET_OUT_LEN); 146 size_t outlen; 147 int ret; 148 149 MCDI_SET_DWORD(inbuf, CDX_DEVICE_CONTROL_GET_IN_BUS, bus_num); 150 MCDI_SET_DWORD(inbuf, CDX_DEVICE_CONTROL_GET_IN_DEVICE, dev_num); 151 ret = cdx_mcdi_rpc(cdx, MC_CMD_CDX_DEVICE_CONTROL_GET, inbuf, 152 sizeof(inbuf), outbuf, sizeof(outbuf), &outlen); 153 if (ret) 154 return ret; 155 156 if (outlen != MC_CMD_CDX_DEVICE_CONTROL_GET_OUT_LEN) 157 return -EIO; 158 159 *flags = MCDI_DWORD(outbuf, CDX_DEVICE_CONTROL_GET_OUT_FLAGS); 160 161 return 0; 162 } 163 164 static int cdx_mcdi_ctrl_flag_set(struct cdx_mcdi *cdx, u8 bus_num, 165 u8 dev_num, bool enable, int bit_pos) 166 { 167 MCDI_DECLARE_BUF(inbuf, MC_CMD_CDX_DEVICE_CONTROL_SET_IN_LEN); 168 u32 flags; 169 int ret; 170 171 /* 172 * Get flags and then set/reset bit at bit_pos according to 173 * the input params. 174 */ 175 ret = cdx_mcdi_ctrl_flag_get(cdx, bus_num, dev_num, &flags); 176 if (ret) 177 return ret; 178 179 flags = flags & (u32)(~(BIT(bit_pos))); 180 if (enable) 181 flags |= (1 << bit_pos); 182 183 MCDI_SET_DWORD(inbuf, CDX_DEVICE_CONTROL_SET_IN_BUS, bus_num); 184 MCDI_SET_DWORD(inbuf, CDX_DEVICE_CONTROL_SET_IN_DEVICE, dev_num); 185 MCDI_SET_DWORD(inbuf, CDX_DEVICE_CONTROL_SET_IN_FLAGS, flags); 186 ret = cdx_mcdi_rpc(cdx, MC_CMD_CDX_DEVICE_CONTROL_SET, inbuf, 187 sizeof(inbuf), NULL, 0, NULL); 188 189 return ret; 190 } 191 192 int cdx_mcdi_bus_master_enable(struct cdx_mcdi *cdx, u8 bus_num, 193 u8 dev_num, bool enable) 194 { 195 return cdx_mcdi_ctrl_flag_set(cdx, bus_num, dev_num, enable, 196 MC_CMD_CDX_DEVICE_CONTROL_SET_IN_BUS_MASTER_ENABLE_LBN); 197 } 198