1 /*- 2 * Copyright (c) 2018 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/cdefs.h> 32 __FBSDID("$FreeBSD$"); 33 34 #include <sys/param.h> 35 #include <sys/systm.h> 36 #include <sys/bus.h> 37 #include <sys/rman.h> 38 #include <sys/kernel.h> 39 #include <sys/module.h> 40 #include <machine/bus.h> 41 42 #include <dev/ofw/ofw_bus.h> 43 #include <dev/ofw/ofw_bus_subr.h> 44 45 #include <arm64/coresight/coresight.h> 46 47 MALLOC_DEFINE(M_CORESIGHT, "coresight", "ARM Coresight"); 48 static struct mtx cs_mtx; 49 50 struct coresight_device_list cs_devs; 51 52 static int 53 coresight_get_ports(phandle_t dev_node, 54 struct coresight_platform_data *pdata) 55 { 56 phandle_t node, child; 57 pcell_t port_reg; 58 phandle_t xref; 59 char *name; 60 int ret; 61 phandle_t endpoint_child; 62 struct endpoint *endp; 63 64 child = ofw_bus_find_child(dev_node, "ports"); 65 if (child) 66 node = child; 67 else 68 node = dev_node; 69 70 for (child = OF_child(node); child != 0; child = OF_peer(child)) { 71 ret = OF_getprop_alloc(child, "name", (void **)&name); 72 if (ret == -1) 73 continue; 74 75 if (strcasecmp(name, "port") || 76 strncasecmp(name, "port@", 6)) { 77 78 port_reg = -1; 79 OF_getencprop(child, "reg", (void *)&port_reg, sizeof(port_reg)); 80 81 endpoint_child = ofw_bus_find_child(child, "endpoint"); 82 if (endpoint_child) { 83 if (OF_getencprop(endpoint_child, "remote-endpoint", &xref, 84 sizeof(xref)) == -1) { 85 printf("failed\n"); 86 continue; 87 } 88 endp = malloc(sizeof(struct endpoint), M_CORESIGHT, 89 M_WAITOK | M_ZERO); 90 endp->my_node = endpoint_child; 91 endp->their_node = OF_node_from_xref(xref); 92 endp->dev_node = dev_node; 93 endp->reg = port_reg; 94 if (OF_getproplen(endpoint_child, "slave-mode") >= 0) { 95 pdata->in_ports++; 96 endp->slave = 1; 97 } else { 98 pdata->out_ports++; 99 } 100 101 mtx_lock(&pdata->mtx_lock); 102 TAILQ_INSERT_TAIL(&pdata->endpoints, endp, link); 103 mtx_unlock(&pdata->mtx_lock); 104 } 105 } 106 } 107 108 return (0); 109 } 110 111 int 112 coresight_register(struct coresight_desc *desc) 113 { 114 struct coresight_device *cs_dev; 115 116 cs_dev = malloc(sizeof(struct coresight_device), 117 M_CORESIGHT, M_WAITOK | M_ZERO); 118 cs_dev->dev = desc->dev; 119 cs_dev->node = ofw_bus_get_node(desc->dev); 120 cs_dev->pdata = desc->pdata; 121 cs_dev->dev_type = desc->dev_type; 122 123 mtx_lock(&cs_mtx); 124 TAILQ_INSERT_TAIL(&cs_devs, cs_dev, link); 125 mtx_unlock(&cs_mtx); 126 127 return (0); 128 } 129 130 struct endpoint * 131 coresight_get_output_endpoint(struct coresight_platform_data *pdata) 132 { 133 struct endpoint *endp; 134 135 if (pdata->out_ports != 1) 136 return (NULL); 137 138 TAILQ_FOREACH(endp, &pdata->endpoints, link) { 139 if (endp->slave == 0) 140 return (endp); 141 } 142 143 return (NULL); 144 } 145 146 struct coresight_device * 147 coresight_get_output_device(struct endpoint *endp, struct endpoint **out_endp) 148 { 149 struct coresight_device *cs_dev; 150 struct endpoint *endp2; 151 152 TAILQ_FOREACH(cs_dev, &cs_devs, link) { 153 TAILQ_FOREACH(endp2, &cs_dev->pdata->endpoints, link) { 154 if (endp->their_node == endp2->my_node) { 155 *out_endp = endp2; 156 return (cs_dev); 157 } 158 } 159 } 160 161 return (NULL); 162 } 163 164 static int 165 coresight_get_cpu(phandle_t node, 166 struct coresight_platform_data *pdata) 167 { 168 phandle_t cpu_node; 169 pcell_t xref; 170 pcell_t cpu_reg; 171 172 if (OF_getencprop(node, "cpu", &xref, sizeof(xref)) != -1) { 173 cpu_node = OF_node_from_xref(xref); 174 if (OF_getencprop(cpu_node, "reg", (void *)&cpu_reg, 175 sizeof(cpu_reg)) > 0) { 176 pdata->cpu = cpu_reg; 177 return (0); 178 } 179 } 180 181 return (-1); 182 } 183 184 struct coresight_platform_data * 185 coresight_get_platform_data(device_t dev) 186 { 187 struct coresight_platform_data *pdata; 188 phandle_t node; 189 190 node = ofw_bus_get_node(dev); 191 192 pdata = malloc(sizeof(struct coresight_platform_data), 193 M_CORESIGHT, M_WAITOK | M_ZERO); 194 mtx_init(&pdata->mtx_lock, "Coresight Platform Data", NULL, MTX_DEF); 195 TAILQ_INIT(&pdata->endpoints); 196 197 coresight_get_cpu(node, pdata); 198 coresight_get_ports(node, pdata); 199 200 if (bootverbose) 201 printf("Total ports: in %d out %d\n", 202 pdata->in_ports, pdata->out_ports); 203 204 return (pdata); 205 } 206 207 static void 208 coresight_init(void) 209 { 210 211 mtx_init(&cs_mtx, "ARM Coresight", NULL, MTX_DEF); 212 TAILQ_INIT(&cs_devs); 213 } 214 215 SYSINIT(coresight, SI_SUB_DRIVERS, SI_ORDER_FIRST, coresight_init, NULL); 216