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
cdx_mcdi_get_num_buses(struct cdx_mcdi * cdx)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
cdx_mcdi_get_num_devs(struct cdx_mcdi * cdx,int bus_num)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
cdx_mcdi_get_dev_config(struct cdx_mcdi * cdx,u8 bus_num,u8 dev_num,struct cdx_dev_params * dev_params)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
cdx_mcdi_reset_device(struct cdx_mcdi * cdx,u8 bus_num,u8 dev_num)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
