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/lock.h> 40 #include <sys/module.h> 41 #include <sys/mutex.h> 42 #include <machine/bus.h> 43 44 #include <dev/ofw/ofw_bus.h> 45 #include <dev/ofw/ofw_bus_subr.h> 46 47 #include <arm64/coresight/coresight.h> 48 49 MALLOC_DEFINE(M_CORESIGHT, "coresight", "ARM Coresight"); 50 static struct mtx cs_mtx; 51 52 struct coresight_device_list cs_devs; 53 54 static int 55 coresight_get_ports(phandle_t dev_node, 56 struct coresight_platform_data *pdata) 57 { 58 phandle_t node, child; 59 pcell_t port_reg; 60 phandle_t xref; 61 char *name; 62 int ret; 63 phandle_t endpoint_child; 64 struct endpoint *endp; 65 66 child = ofw_bus_find_child(dev_node, "ports"); 67 if (child) 68 node = child; 69 else 70 node = dev_node; 71 72 for (child = OF_child(node); child != 0; child = OF_peer(child)) { 73 ret = OF_getprop_alloc(child, "name", (void **)&name); 74 if (ret == -1) 75 continue; 76 77 if (strcasecmp(name, "port") || 78 strncasecmp(name, "port@", 6)) { 79 80 port_reg = -1; 81 OF_getencprop(child, "reg", (void *)&port_reg, sizeof(port_reg)); 82 83 endpoint_child = ofw_bus_find_child(child, "endpoint"); 84 if (endpoint_child) { 85 if (OF_getencprop(endpoint_child, "remote-endpoint", &xref, 86 sizeof(xref)) == -1) { 87 printf("failed\n"); 88 continue; 89 } 90 endp = malloc(sizeof(struct endpoint), M_CORESIGHT, 91 M_WAITOK | M_ZERO); 92 endp->my_node = endpoint_child; 93 endp->their_node = OF_node_from_xref(xref); 94 endp->dev_node = dev_node; 95 endp->reg = port_reg; 96 if (OF_getproplen(endpoint_child, "slave-mode") >= 0) { 97 pdata->in_ports++; 98 endp->slave = 1; 99 } else { 100 pdata->out_ports++; 101 } 102 103 mtx_lock(&pdata->mtx_lock); 104 TAILQ_INSERT_TAIL(&pdata->endpoints, endp, link); 105 mtx_unlock(&pdata->mtx_lock); 106 } 107 } 108 } 109 110 return (0); 111 } 112 113 int 114 coresight_register(struct coresight_desc *desc) 115 { 116 struct coresight_device *cs_dev; 117 118 cs_dev = malloc(sizeof(struct coresight_device), 119 M_CORESIGHT, M_WAITOK | M_ZERO); 120 cs_dev->dev = desc->dev; 121 cs_dev->node = ofw_bus_get_node(desc->dev); 122 cs_dev->pdata = desc->pdata; 123 cs_dev->dev_type = desc->dev_type; 124 125 mtx_lock(&cs_mtx); 126 TAILQ_INSERT_TAIL(&cs_devs, cs_dev, link); 127 mtx_unlock(&cs_mtx); 128 129 return (0); 130 } 131 132 struct endpoint * 133 coresight_get_output_endpoint(struct coresight_platform_data *pdata) 134 { 135 struct endpoint *endp; 136 137 if (pdata->out_ports != 1) 138 return (NULL); 139 140 TAILQ_FOREACH(endp, &pdata->endpoints, link) { 141 if (endp->slave == 0) 142 return (endp); 143 } 144 145 return (NULL); 146 } 147 148 struct coresight_device * 149 coresight_get_output_device(struct endpoint *endp, struct endpoint **out_endp) 150 { 151 struct coresight_device *cs_dev; 152 struct endpoint *endp2; 153 154 TAILQ_FOREACH(cs_dev, &cs_devs, link) { 155 TAILQ_FOREACH(endp2, &cs_dev->pdata->endpoints, link) { 156 if (endp->their_node == endp2->my_node) { 157 *out_endp = endp2; 158 return (cs_dev); 159 } 160 } 161 } 162 163 return (NULL); 164 } 165 166 static int 167 coresight_get_cpu(phandle_t node, 168 struct coresight_platform_data *pdata) 169 { 170 phandle_t cpu_node; 171 pcell_t xref; 172 pcell_t cpu_reg; 173 174 if (OF_getencprop(node, "cpu", &xref, sizeof(xref)) != -1) { 175 cpu_node = OF_node_from_xref(xref); 176 if (OF_getencprop(cpu_node, "reg", (void *)&cpu_reg, 177 sizeof(cpu_reg)) > 0) { 178 pdata->cpu = cpu_reg; 179 return (0); 180 } 181 } 182 183 return (-1); 184 } 185 186 struct coresight_platform_data * 187 coresight_get_platform_data(device_t dev) 188 { 189 struct coresight_platform_data *pdata; 190 phandle_t node; 191 192 node = ofw_bus_get_node(dev); 193 194 pdata = malloc(sizeof(struct coresight_platform_data), 195 M_CORESIGHT, M_WAITOK | M_ZERO); 196 mtx_init(&pdata->mtx_lock, "Coresight Platform Data", NULL, MTX_DEF); 197 TAILQ_INIT(&pdata->endpoints); 198 199 coresight_get_cpu(node, pdata); 200 coresight_get_ports(node, pdata); 201 202 if (bootverbose) 203 printf("Total ports: in %d out %d\n", 204 pdata->in_ports, pdata->out_ports); 205 206 return (pdata); 207 } 208 209 static void 210 coresight_init(void) 211 { 212 213 mtx_init(&cs_mtx, "ARM Coresight", NULL, MTX_DEF); 214 TAILQ_INIT(&cs_devs); 215 } 216 217 SYSINIT(coresight, SI_SUB_DRIVERS, SI_ORDER_FIRST, coresight_init, NULL); 218