1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
|
// SPDX-License-Identifier: GPL-2.0
/*
* CDX host controller driver for AMD versal-net platform.
*
* Copyright (C) 2022-2023, Advanced Micro Devices, Inc.
*/
#include <linux/mod_devicetable.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/cdx/cdx_bus.h>
#include "cdx_controller.h"
#include "../cdx.h"
#include "mcdi_functions.h"
#include "mcdi.h"
static unsigned int cdx_mcdi_rpc_timeout(struct cdx_mcdi *cdx, unsigned int cmd)
{
return MCDI_RPC_TIMEOUT;
}
static void cdx_mcdi_request(struct cdx_mcdi *cdx,
const struct cdx_dword *hdr, size_t hdr_len,
const struct cdx_dword *sdu, size_t sdu_len)
{
if (cdx_rpmsg_send(cdx, hdr, hdr_len, sdu, sdu_len))
dev_err(&cdx->rpdev->dev, "Failed to send rpmsg data\n");
}
static const struct cdx_mcdi_ops mcdi_ops = {
.mcdi_rpc_timeout = cdx_mcdi_rpc_timeout,
.mcdi_request = cdx_mcdi_request,
};
void cdx_rpmsg_post_probe(struct cdx_controller *cdx)
{
/* Register CDX controller with CDX bus driver */
if (cdx_register_controller(cdx))
dev_err(cdx->dev, "Failed to register CDX controller\n");
}
void cdx_rpmsg_pre_remove(struct cdx_controller *cdx)
{
cdx_unregister_controller(cdx);
cdx_mcdi_wait_for_quiescence(cdx->priv, MCDI_RPC_TIMEOUT);
}
static int cdx_configure_device(struct cdx_controller *cdx,
u8 bus_num, u8 dev_num,
struct cdx_device_config *dev_config)
{
int ret = 0;
switch (dev_config->type) {
case CDX_DEV_RESET_CONF:
ret = cdx_mcdi_reset_device(cdx->priv, bus_num, dev_num);
break;
default:
ret = -EINVAL;
}
return ret;
}
static int cdx_scan_devices(struct cdx_controller *cdx)
{
struct cdx_mcdi *cdx_mcdi = cdx->priv;
u8 bus_num, dev_num, num_cdx_bus;
int ret;
/* MCDI FW Read: Fetch the number of CDX buses on this controller */
ret = cdx_mcdi_get_num_buses(cdx_mcdi);
if (ret < 0) {
dev_err(cdx->dev,
"Get number of CDX buses failed: %d\n", ret);
return ret;
}
num_cdx_bus = (u8)ret;
for (bus_num = 0; bus_num < num_cdx_bus; bus_num++) {
u8 num_cdx_dev;
/* MCDI FW Read: Fetch the number of devices present */
ret = cdx_mcdi_get_num_devs(cdx_mcdi, bus_num);
if (ret < 0) {
dev_err(cdx->dev,
"Get devices on CDX bus %d failed: %d\n", bus_num, ret);
continue;
}
num_cdx_dev = (u8)ret;
for (dev_num = 0; dev_num < num_cdx_dev; dev_num++) {
struct cdx_dev_params dev_params;
/* MCDI FW: Get the device config */
ret = cdx_mcdi_get_dev_config(cdx_mcdi, bus_num,
dev_num, &dev_params);
if (ret) {
dev_err(cdx->dev,
"CDX device config get failed for %d(bus):%d(dev), %d\n",
bus_num, dev_num, ret);
continue;
}
dev_params.cdx = cdx;
/* Add the device to the cdx bus */
ret = cdx_device_add(&dev_params);
if (ret) {
dev_err(cdx->dev, "registering cdx dev: %d failed: %d\n",
dev_num, ret);
continue;
}
dev_dbg(cdx->dev, "CDX dev: %d on cdx bus: %d created\n",
dev_num, bus_num);
}
}
return 0;
}
static struct cdx_ops cdx_ops = {
.scan = cdx_scan_devices,
.dev_configure = cdx_configure_device,
};
static int xlnx_cdx_probe(struct platform_device *pdev)
{
struct cdx_controller *cdx;
struct cdx_mcdi *cdx_mcdi;
int ret;
cdx_mcdi = kzalloc(sizeof(*cdx_mcdi), GFP_KERNEL);
if (!cdx_mcdi)
return -ENOMEM;
/* Store the MCDI ops */
cdx_mcdi->mcdi_ops = &mcdi_ops;
/* MCDI FW: Initialize the FW path */
ret = cdx_mcdi_init(cdx_mcdi);
if (ret) {
dev_err_probe(&pdev->dev, ret, "MCDI Initialization failed\n");
goto mcdi_init_fail;
}
cdx = kzalloc(sizeof(*cdx), GFP_KERNEL);
if (!cdx) {
ret = -ENOMEM;
goto cdx_alloc_fail;
}
platform_set_drvdata(pdev, cdx);
cdx->dev = &pdev->dev;
cdx->priv = cdx_mcdi;
cdx->ops = &cdx_ops;
ret = cdx_setup_rpmsg(pdev);
if (ret) {
if (ret != -EPROBE_DEFER)
dev_err(&pdev->dev, "Failed to register CDX RPMsg transport\n");
goto cdx_rpmsg_fail;
}
dev_info(&pdev->dev, "Successfully registered CDX controller with RPMsg as transport\n");
return 0;
cdx_rpmsg_fail:
kfree(cdx);
cdx_alloc_fail:
cdx_mcdi_finish(cdx_mcdi);
mcdi_init_fail:
kfree(cdx_mcdi);
return ret;
}
static int xlnx_cdx_remove(struct platform_device *pdev)
{
struct cdx_controller *cdx = platform_get_drvdata(pdev);
struct cdx_mcdi *cdx_mcdi = cdx->priv;
cdx_destroy_rpmsg(pdev);
kfree(cdx);
cdx_mcdi_finish(cdx_mcdi);
kfree(cdx_mcdi);
return 0;
}
static const struct of_device_id cdx_match_table[] = {
{.compatible = "xlnx,versal-net-cdx",},
{ },
};
MODULE_DEVICE_TABLE(of, cdx_match_table);
static struct platform_driver cdx_pdriver = {
.driver = {
.name = "cdx-controller",
.pm = NULL,
.of_match_table = cdx_match_table,
},
.probe = xlnx_cdx_probe,
.remove = xlnx_cdx_remove,
};
static int __init cdx_controller_init(void)
{
int ret;
ret = platform_driver_register(&cdx_pdriver);
if (ret)
pr_err("platform_driver_register() failed: %d\n", ret);
return ret;
}
static void __exit cdx_controller_exit(void)
{
platform_driver_unregister(&cdx_pdriver);
}
module_init(cdx_controller_init);
module_exit(cdx_controller_exit);
MODULE_AUTHOR("AMD Inc.");
MODULE_DESCRIPTION("CDX controller for AMD devices");
MODULE_LICENSE("GPL");
|
