1 /*-
2 * Copyright (c) 2018-2020 Ruslan Bukin <br@bsdpad.com>
3 * All rights reserved.
4 *
5 * This software was developed by SRI International and the University of
6 * Cambridge Computer Laboratory under DARPA/AFRL contract FA8750-10-C-0237
7 * ("CTSRD"), as part of the DARPA CRASH research programme.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 * SUCH DAMAGE.
29 */
30
31 #include <sys/param.h>
32 #include <sys/systm.h>
33 #include <sys/bus.h>
34 #include <sys/rman.h>
35 #include <sys/kernel.h>
36 #include <sys/lock.h>
37 #include <sys/module.h>
38 #include <sys/mutex.h>
39 #include <machine/bus.h>
40
41 #include <dev/ofw/ofw_bus.h>
42 #include <dev/ofw/ofw_bus_subr.h>
43
44 #include <arm64/coresight/coresight.h>
45
46 static int
coresight_fdt_get_ports(phandle_t dev_node,struct coresight_platform_data * pdata)47 coresight_fdt_get_ports(phandle_t dev_node,
48 struct coresight_platform_data *pdata)
49 {
50 phandle_t node, child;
51 pcell_t port_reg;
52 phandle_t xref;
53 char *name;
54 int ret;
55 phandle_t endpoint_child;
56 struct endpoint *endp;
57
58 child = ofw_bus_find_child(dev_node, "ports");
59 if (child)
60 node = child;
61 else
62 node = dev_node;
63
64 for (child = OF_child(node); child != 0; child = OF_peer(child)) {
65 ret = OF_getprop_alloc(child, "name", (void **)&name);
66 if (ret == -1)
67 continue;
68
69 if (strcasecmp(name, "port") ||
70 strncasecmp(name, "port@", 6)) {
71 port_reg = -1;
72 OF_getencprop(child, "reg", (void *)&port_reg,
73 sizeof(port_reg));
74
75 endpoint_child = ofw_bus_find_child(child, "endpoint");
76 if (endpoint_child) {
77 if (OF_getencprop(endpoint_child,
78 "remote-endpoint", &xref,
79 sizeof(xref)) == -1) {
80 printf("failed\n");
81 continue;
82 }
83 endp = malloc(sizeof(struct endpoint),
84 M_CORESIGHT, M_WAITOK | M_ZERO);
85 endp->my_node = endpoint_child;
86 endp->their_node = OF_node_from_xref(xref);
87 endp->dev_node = dev_node;
88 endp->reg = port_reg;
89 if (OF_getproplen(endpoint_child,
90 "slave-mode") >= 0) {
91 pdata->in_ports++;
92 endp->input = 1;
93 } else
94 pdata->out_ports++;
95
96 mtx_lock(&pdata->mtx_lock);
97 TAILQ_INSERT_TAIL(&pdata->endpoints,
98 endp, link);
99 mtx_unlock(&pdata->mtx_lock);
100 }
101 }
102 }
103
104 return (0);
105 }
106
107 static int
coresight_fdt_get_cpu(phandle_t node,struct coresight_platform_data * pdata)108 coresight_fdt_get_cpu(phandle_t node,
109 struct coresight_platform_data *pdata)
110 {
111 phandle_t cpu_node;
112 pcell_t xref;
113 pcell_t cpu_reg;
114
115 if (OF_getencprop(node, "cpu", &xref, sizeof(xref)) != -1) {
116 cpu_node = OF_node_from_xref(xref);
117 if (OF_getencprop(cpu_node, "reg", (void *)&cpu_reg,
118 sizeof(cpu_reg)) > 0) {
119 pdata->cpu = cpu_reg;
120 return (0);
121 }
122 }
123
124 return (-1);
125 }
126
127 struct coresight_platform_data *
coresight_fdt_get_platform_data(device_t dev)128 coresight_fdt_get_platform_data(device_t dev)
129 {
130 struct coresight_platform_data *pdata;
131 phandle_t node;
132
133 node = ofw_bus_get_node(dev);
134
135 pdata = malloc(sizeof(struct coresight_platform_data),
136 M_CORESIGHT, M_WAITOK | M_ZERO);
137 pdata->bus_type = CORESIGHT_BUS_FDT;
138
139 mtx_init(&pdata->mtx_lock, "Coresight Platform Data", NULL, MTX_DEF);
140 TAILQ_INIT(&pdata->endpoints);
141
142 coresight_fdt_get_cpu(node, pdata);
143 coresight_fdt_get_ports(node, pdata);
144
145 if (bootverbose)
146 printf("Total ports: in %d out %d\n",
147 pdata->in_ports, pdata->out_ports);
148
149 return (pdata);
150 }
151