1 // SPDX-License-Identifier: GPL-2.0
3 * Copyright (C) 2022-2023, Advanced Micro Devices, Inc.
6 #include <linux/module.h>
9 #include "mcdi_functions.h"
11 int cdx_mcdi_get_num_buses(struct cdx_mcdi *cdx)
13 MCDI_DECLARE_BUF(outbuf, MC_CMD_CDX_BUS_ENUM_BUSES_OUT_LEN);
17 ret = cdx_mcdi_rpc(cdx, MC_CMD_CDX_BUS_ENUM_BUSES, NULL, 0,
18 outbuf, sizeof(outbuf), &outlen);
22 if (outlen != MC_CMD_CDX_BUS_ENUM_BUSES_OUT_LEN)
25 return MCDI_DWORD(outbuf, CDX_BUS_ENUM_BUSES_OUT_BUS_COUNT);
28 int cdx_mcdi_get_num_devs(struct cdx_mcdi *cdx, int bus_num)
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);
35 MCDI_SET_DWORD(inbuf, CDX_BUS_ENUM_DEVICES_IN_BUS, bus_num);
37 ret = cdx_mcdi_rpc(cdx, MC_CMD_CDX_BUS_ENUM_DEVICES, inbuf, sizeof(inbuf),
38 outbuf, sizeof(outbuf), &outlen);
42 if (outlen != MC_CMD_CDX_BUS_ENUM_DEVICES_OUT_LEN)
45 return MCDI_DWORD(outbuf, CDX_BUS_ENUM_DEVICES_OUT_DEVICE_COUNT);
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)
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];
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);
62 ret = cdx_mcdi_rpc(cdx, MC_CMD_CDX_BUS_GET_DEVICE_CONFIG, inbuf, sizeof(inbuf),
63 outbuf, sizeof(outbuf), &outlen);
67 if (outlen != MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT_LEN)
70 dev_params->bus_num = bus_num;
71 dev_params->dev_num = dev_num;
73 req_id = MCDI_DWORD(outbuf, CDX_BUS_GET_DEVICE_CONFIG_OUT_REQUESTER_ID);
74 dev_params->req_id = req_id;
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) +
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++;
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) +
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++;
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) +
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++;
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) +
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++;
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 dev_params->subsys_vendor = MCDI_WORD(outbuf,
124 CDX_BUS_GET_DEVICE_CONFIG_OUT_SUBSYS_VENDOR_ID);
125 dev_params->subsys_device = MCDI_WORD(outbuf,
126 CDX_BUS_GET_DEVICE_CONFIG_OUT_SUBSYS_DEVICE_ID);
127 dev_params->class = MCDI_DWORD(outbuf,
128 CDX_BUS_GET_DEVICE_CONFIG_OUT_DEVICE_CLASS) & 0xFFFFFF;
129 dev_params->revision = MCDI_BYTE(outbuf, CDX_BUS_GET_DEVICE_CONFIG_OUT_DEVICE_REVISION);
134 int cdx_mcdi_bus_enable(struct cdx_mcdi *cdx, u8 bus_num)
136 MCDI_DECLARE_BUF(inbuf, MC_CMD_CDX_BUS_UP_IN_LEN);
139 MCDI_SET_DWORD(inbuf, CDX_BUS_UP_IN_BUS, bus_num);
140 ret = cdx_mcdi_rpc(cdx, MC_CMD_CDX_BUS_UP, inbuf, sizeof(inbuf),
146 int cdx_mcdi_bus_disable(struct cdx_mcdi *cdx, u8 bus_num)
148 MCDI_DECLARE_BUF(inbuf, MC_CMD_CDX_BUS_DOWN_IN_LEN);
151 MCDI_SET_DWORD(inbuf, CDX_BUS_DOWN_IN_BUS, bus_num);
152 ret = cdx_mcdi_rpc(cdx, MC_CMD_CDX_BUS_DOWN, inbuf, sizeof(inbuf),
158 int cdx_mcdi_reset_device(struct cdx_mcdi *cdx, u8 bus_num, u8 dev_num)
160 MCDI_DECLARE_BUF(inbuf, MC_CMD_CDX_DEVICE_RESET_IN_LEN);
163 MCDI_SET_DWORD(inbuf, CDX_DEVICE_RESET_IN_BUS, bus_num);
164 MCDI_SET_DWORD(inbuf, CDX_DEVICE_RESET_IN_DEVICE, dev_num);
166 ret = cdx_mcdi_rpc(cdx, MC_CMD_CDX_DEVICE_RESET, inbuf, sizeof(inbuf),
172 static int cdx_mcdi_ctrl_flag_get(struct cdx_mcdi *cdx, u8 bus_num,
173 u8 dev_num, u32 *flags)
175 MCDI_DECLARE_BUF(inbuf, MC_CMD_CDX_DEVICE_CONTROL_GET_IN_LEN);
176 MCDI_DECLARE_BUF(outbuf, MC_CMD_CDX_DEVICE_CONTROL_GET_OUT_LEN);
180 MCDI_SET_DWORD(inbuf, CDX_DEVICE_CONTROL_GET_IN_BUS, bus_num);
181 MCDI_SET_DWORD(inbuf, CDX_DEVICE_CONTROL_GET_IN_DEVICE, dev_num);
182 ret = cdx_mcdi_rpc(cdx, MC_CMD_CDX_DEVICE_CONTROL_GET, inbuf,
183 sizeof(inbuf), outbuf, sizeof(outbuf), &outlen);
187 if (outlen != MC_CMD_CDX_DEVICE_CONTROL_GET_OUT_LEN)
190 *flags = MCDI_DWORD(outbuf, CDX_DEVICE_CONTROL_GET_OUT_FLAGS);
195 static int cdx_mcdi_ctrl_flag_set(struct cdx_mcdi *cdx, u8 bus_num,
196 u8 dev_num, bool enable, int bit_pos)
198 MCDI_DECLARE_BUF(inbuf, MC_CMD_CDX_DEVICE_CONTROL_SET_IN_LEN);
203 * Get flags and then set/reset bit at bit_pos according to
206 ret = cdx_mcdi_ctrl_flag_get(cdx, bus_num, dev_num, &flags);
210 flags = flags & (u32)(~(BIT(bit_pos)));
212 flags |= (1 << bit_pos);
214 MCDI_SET_DWORD(inbuf, CDX_DEVICE_CONTROL_SET_IN_BUS, bus_num);
215 MCDI_SET_DWORD(inbuf, CDX_DEVICE_CONTROL_SET_IN_DEVICE, dev_num);
216 MCDI_SET_DWORD(inbuf, CDX_DEVICE_CONTROL_SET_IN_FLAGS, flags);
217 ret = cdx_mcdi_rpc(cdx, MC_CMD_CDX_DEVICE_CONTROL_SET, inbuf,
218 sizeof(inbuf), NULL, 0, NULL);
223 int cdx_mcdi_bus_master_enable(struct cdx_mcdi *cdx, u8 bus_num,
224 u8 dev_num, bool enable)
226 return cdx_mcdi_ctrl_flag_set(cdx, bus_num, dev_num, enable,
227 MC_CMD_CDX_DEVICE_CONTROL_SET_IN_BUS_MASTER_ENABLE_LBN);