Loading...
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
11int 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
28int 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
48int 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_V2_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_V2_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->msi_dev_id = MCDI_DWORD(outbuf,
77 CDX_BUS_GET_DEVICE_CONFIG_OUT_V2_REQUESTER_DEVICE_ID);
78
79 dev_params->res_count = 0;
80 if (MCDI_QWORD(outbuf, CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION0_SIZE) != 0) {
81 res[dev_params->res_count].start =
82 MCDI_QWORD(outbuf, CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION0_BASE);
83 res[dev_params->res_count].end =
84 MCDI_QWORD(outbuf, CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION0_BASE) +
85 MCDI_QWORD(outbuf,
86 CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION0_SIZE) - 1;
87 res[dev_params->res_count].flags = IORESOURCE_MEM;
88 dev_params->res_count++;
89 }
90
91 if (MCDI_QWORD(outbuf, CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION1_SIZE) != 0) {
92 res[dev_params->res_count].start =
93 MCDI_QWORD(outbuf, CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION1_BASE);
94 res[dev_params->res_count].end =
95 MCDI_QWORD(outbuf, CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION1_BASE) +
96 MCDI_QWORD(outbuf,
97 CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION1_SIZE) - 1;
98 res[dev_params->res_count].flags = IORESOURCE_MEM;
99 dev_params->res_count++;
100 }
101
102 if (MCDI_QWORD(outbuf, CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION2_SIZE) != 0) {
103 res[dev_params->res_count].start =
104 MCDI_QWORD(outbuf, CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION2_BASE);
105 res[dev_params->res_count].end =
106 MCDI_QWORD(outbuf, CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION2_BASE) +
107 MCDI_QWORD(outbuf,
108 CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION2_SIZE) - 1;
109 res[dev_params->res_count].flags = IORESOURCE_MEM;
110 dev_params->res_count++;
111 }
112
113 if (MCDI_QWORD(outbuf, CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION3_SIZE) != 0) {
114 res[dev_params->res_count].start =
115 MCDI_QWORD(outbuf, CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION3_BASE);
116 res[dev_params->res_count].end =
117 MCDI_QWORD(outbuf, CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION3_BASE) +
118 MCDI_QWORD(outbuf,
119 CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION3_SIZE) - 1;
120 res[dev_params->res_count].flags = IORESOURCE_MEM;
121 dev_params->res_count++;
122 }
123
124 dev_params->vendor = MCDI_WORD(outbuf, CDX_BUS_GET_DEVICE_CONFIG_OUT_VENDOR_ID);
125 dev_params->device = MCDI_WORD(outbuf, CDX_BUS_GET_DEVICE_CONFIG_OUT_DEVICE_ID);
126 dev_params->subsys_vendor = MCDI_WORD(outbuf,
127 CDX_BUS_GET_DEVICE_CONFIG_OUT_SUBSYS_VENDOR_ID);
128 dev_params->subsys_device = MCDI_WORD(outbuf,
129 CDX_BUS_GET_DEVICE_CONFIG_OUT_SUBSYS_DEVICE_ID);
130 dev_params->class = MCDI_DWORD(outbuf,
131 CDX_BUS_GET_DEVICE_CONFIG_OUT_DEVICE_CLASS) & 0xFFFFFF;
132 dev_params->revision = MCDI_BYTE(outbuf, CDX_BUS_GET_DEVICE_CONFIG_OUT_DEVICE_REVISION);
133 dev_params->num_msi = MCDI_DWORD(outbuf, CDX_BUS_GET_DEVICE_CONFIG_OUT_MSI_COUNT);
134
135 return 0;
136}
137
138int cdx_mcdi_bus_enable(struct cdx_mcdi *cdx, u8 bus_num)
139{
140 MCDI_DECLARE_BUF(inbuf, MC_CMD_CDX_BUS_UP_IN_LEN);
141 int ret;
142
143 MCDI_SET_DWORD(inbuf, CDX_BUS_UP_IN_BUS, bus_num);
144 ret = cdx_mcdi_rpc(cdx, MC_CMD_CDX_BUS_UP, inbuf, sizeof(inbuf),
145 NULL, 0, NULL);
146
147 return ret;
148}
149
150int cdx_mcdi_bus_disable(struct cdx_mcdi *cdx, u8 bus_num)
151{
152 MCDI_DECLARE_BUF(inbuf, MC_CMD_CDX_BUS_DOWN_IN_LEN);
153 int ret;
154
155 MCDI_SET_DWORD(inbuf, CDX_BUS_DOWN_IN_BUS, bus_num);
156 ret = cdx_mcdi_rpc(cdx, MC_CMD_CDX_BUS_DOWN, inbuf, sizeof(inbuf),
157 NULL, 0, NULL);
158
159 return ret;
160}
161
162int cdx_mcdi_write_msi(struct cdx_mcdi *cdx, u8 bus_num, u8 dev_num,
163 u32 msi_vector, u64 msi_address, u32 msi_data)
164{
165 MCDI_DECLARE_BUF(inbuf, MC_CMD_CDX_DEVICE_WRITE_MSI_MSG_IN_LEN);
166 int ret;
167
168 MCDI_SET_DWORD(inbuf, CDX_DEVICE_WRITE_MSI_MSG_IN_BUS, bus_num);
169 MCDI_SET_DWORD(inbuf, CDX_DEVICE_WRITE_MSI_MSG_IN_DEVICE, dev_num);
170 MCDI_SET_DWORD(inbuf, CDX_DEVICE_WRITE_MSI_MSG_IN_MSI_VECTOR, msi_vector);
171 MCDI_SET_QWORD(inbuf, CDX_DEVICE_WRITE_MSI_MSG_IN_MSI_ADDRESS, msi_address);
172 MCDI_SET_DWORD(inbuf, CDX_DEVICE_WRITE_MSI_MSG_IN_MSI_DATA, msi_data);
173
174 ret = cdx_mcdi_rpc(cdx, MC_CMD_CDX_DEVICE_WRITE_MSI_MSG, inbuf, sizeof(inbuf),
175 NULL, 0, NULL);
176
177 return ret;
178}
179
180int cdx_mcdi_reset_device(struct cdx_mcdi *cdx, u8 bus_num, u8 dev_num)
181{
182 MCDI_DECLARE_BUF(inbuf, MC_CMD_CDX_DEVICE_RESET_IN_LEN);
183 int ret;
184
185 MCDI_SET_DWORD(inbuf, CDX_DEVICE_RESET_IN_BUS, bus_num);
186 MCDI_SET_DWORD(inbuf, CDX_DEVICE_RESET_IN_DEVICE, dev_num);
187
188 ret = cdx_mcdi_rpc(cdx, MC_CMD_CDX_DEVICE_RESET, inbuf, sizeof(inbuf),
189 NULL, 0, NULL);
190
191 return ret;
192}
193
194static int cdx_mcdi_ctrl_flag_get(struct cdx_mcdi *cdx, u8 bus_num,
195 u8 dev_num, u32 *flags)
196{
197 MCDI_DECLARE_BUF(inbuf, MC_CMD_CDX_DEVICE_CONTROL_GET_IN_LEN);
198 MCDI_DECLARE_BUF(outbuf, MC_CMD_CDX_DEVICE_CONTROL_GET_OUT_LEN);
199 size_t outlen;
200 int ret;
201
202 MCDI_SET_DWORD(inbuf, CDX_DEVICE_CONTROL_GET_IN_BUS, bus_num);
203 MCDI_SET_DWORD(inbuf, CDX_DEVICE_CONTROL_GET_IN_DEVICE, dev_num);
204 ret = cdx_mcdi_rpc(cdx, MC_CMD_CDX_DEVICE_CONTROL_GET, inbuf,
205 sizeof(inbuf), outbuf, sizeof(outbuf), &outlen);
206 if (ret)
207 return ret;
208
209 if (outlen != MC_CMD_CDX_DEVICE_CONTROL_GET_OUT_LEN)
210 return -EIO;
211
212 *flags = MCDI_DWORD(outbuf, CDX_DEVICE_CONTROL_GET_OUT_FLAGS);
213
214 return 0;
215}
216
217static int cdx_mcdi_ctrl_flag_set(struct cdx_mcdi *cdx, u8 bus_num,
218 u8 dev_num, bool enable, int bit_pos)
219{
220 MCDI_DECLARE_BUF(inbuf, MC_CMD_CDX_DEVICE_CONTROL_SET_IN_LEN);
221 u32 flags;
222 int ret;
223
224 /*
225 * Get flags and then set/reset bit at bit_pos according to
226 * the input params.
227 */
228 ret = cdx_mcdi_ctrl_flag_get(cdx, bus_num, dev_num, &flags);
229 if (ret)
230 return ret;
231
232 flags = flags & (u32)(~(BIT(bit_pos)));
233 if (enable)
234 flags |= (1 << bit_pos);
235
236 MCDI_SET_DWORD(inbuf, CDX_DEVICE_CONTROL_SET_IN_BUS, bus_num);
237 MCDI_SET_DWORD(inbuf, CDX_DEVICE_CONTROL_SET_IN_DEVICE, dev_num);
238 MCDI_SET_DWORD(inbuf, CDX_DEVICE_CONTROL_SET_IN_FLAGS, flags);
239 ret = cdx_mcdi_rpc(cdx, MC_CMD_CDX_DEVICE_CONTROL_SET, inbuf,
240 sizeof(inbuf), NULL, 0, NULL);
241
242 return ret;
243}
244
245int cdx_mcdi_bus_master_enable(struct cdx_mcdi *cdx, u8 bus_num,
246 u8 dev_num, bool enable)
247{
248 return cdx_mcdi_ctrl_flag_set(cdx, bus_num, dev_num, enable,
249 MC_CMD_CDX_DEVICE_CONTROL_SET_IN_BUS_MASTER_ENABLE_LBN);
250}
251
252int cdx_mcdi_msi_enable(struct cdx_mcdi *cdx, u8 bus_num,
253 u8 dev_num, bool enable)
254{
255 return cdx_mcdi_ctrl_flag_set(cdx, bus_num, dev_num, enable,
256 MC_CMD_CDX_DEVICE_CONTROL_SET_IN_MSI_ENABLE_LBN);
257}