1 /*- 2 * Copyright (c) 2015 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/kernel.h> 38 #include <sys/module.h> 39 #include <sys/rman.h> 40 41 #include <dev/ofw/openfirm.h> 42 #include <dev/ofw/ofw_bus.h> 43 #include <dev/ofw/ofw_bus_subr.h> 44 45 #include "pmu.h" 46 47 static struct ofw_compat_data compat_data[] = { 48 {"arm,armv8-pmuv3", 1}, 49 {"arm,cortex-a77-pmu", 1}, 50 {"arm,cortex-a76-pmu", 1}, 51 {"arm,cortex-a75-pmu", 1}, 52 {"arm,cortex-a73-pmu", 1}, 53 {"arm,cortex-a72-pmu", 1}, 54 {"arm,cortex-a65-pmu", 1}, 55 {"arm,cortex-a57-pmu", 1}, 56 {"arm,cortex-a55-pmu", 1}, 57 {"arm,cortex-a53-pmu", 1}, 58 {"arm,cortex-a34-pmu", 1}, 59 60 {"arm,cortex-a17-pmu", 1}, 61 {"arm,cortex-a15-pmu", 1}, 62 {"arm,cortex-a12-pmu", 1}, 63 {"arm,cortex-a9-pmu", 1}, 64 {"arm,cortex-a8-pmu", 1}, 65 {"arm,cortex-a7-pmu", 1}, 66 {"arm,cortex-a5-pmu", 1}, 67 {"arm,arm11mpcore-pmu", 1}, 68 {"arm,arm1176-pmu", 1}, 69 {"arm,arm1136-pmu", 1}, 70 {"qcom,krait-pmu", 1}, 71 {NULL, 0} 72 }; 73 74 static int 75 pmu_fdt_probe(device_t dev) 76 { 77 78 if (!ofw_bus_status_okay(dev)) 79 return (ENXIO); 80 81 if (ofw_bus_search_compatible(dev, compat_data)->ocd_data != 0) { 82 device_set_desc(dev, "Performance Monitoring Unit"); 83 return (BUS_PROBE_DEFAULT); 84 } 85 86 return (ENXIO); 87 } 88 89 static int 90 pmu_parse_affinity(device_t dev, struct pmu_softc *sc, struct pmu_intr *irq, 91 phandle_t xref, uint32_t mpidr) 92 { 93 struct pcpu *pcpu; 94 int i, err; 95 96 97 if (xref != 0) { 98 err = OF_getencprop(OF_node_from_xref(xref), "reg", &mpidr, 99 sizeof(mpidr)); 100 if (err < 0) { 101 device_printf(dev, "missing 'reg' property\n"); 102 return (ENXIO); 103 } 104 } 105 106 for (i = 0; i < MAXCPU; i++) { 107 pcpu = pcpu_find(i); 108 if (pcpu != NULL && PCPU_GET_MPIDR(pcpu) == mpidr) { 109 irq->cpuid = i; 110 return (0); 111 } 112 } 113 114 device_printf(dev, "Cannot find CPU with MPIDR: 0x%08X\n", mpidr); 115 return (ENXIO); 116 } 117 118 static int 119 pmu_parse_intr(device_t dev, struct pmu_softc *sc) 120 { 121 bool has_affinity; 122 phandle_t node, *cpus; 123 int rid, err, ncpus, i; 124 125 126 node = ofw_bus_get_node(dev); 127 has_affinity = OF_hasprop(node, "interrupt-affinity"); 128 129 for (i = 0; i < MAX_RLEN; i++) 130 sc->irq[i].cpuid = -1; 131 132 cpus = NULL; 133 if (has_affinity) { 134 ncpus = OF_getencprop_alloc_multi(node, "interrupt-affinity", 135 sizeof(*cpus), (void **)&cpus); 136 if (ncpus < 0) { 137 device_printf(dev, 138 "Cannot read interrupt affinity property\n"); 139 return (ENXIO); 140 } 141 } 142 143 /* Process first interrupt */ 144 rid = 0; 145 sc->irq[0].res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, 146 RF_ACTIVE | RF_SHAREABLE); 147 148 if (sc->irq[0].res == NULL) { 149 device_printf(dev, "Cannot get interrupt\n"); 150 err = ENXIO; 151 goto done; 152 } 153 154 /* Check if PMU have one per-CPU interrupt */ 155 if (intr_is_per_cpu(sc->irq[0].res)) { 156 if (has_affinity) { 157 device_printf(dev, 158 "Per CPU interupt have declared affinity\n"); 159 err = ENXIO; 160 goto done; 161 } 162 return (0); 163 } 164 165 /* 166 * PMU with set of generic interrupts (one per core) 167 * Each one must be binded to exact core. 168 */ 169 err = pmu_parse_affinity(dev, sc, sc->irq + 0, 170 has_affinity ? cpus[0] : 0, 0); 171 if (err != 0) { 172 device_printf(dev, "Cannot parse affinity for CPUid: 0\n"); 173 goto done; 174 } 175 176 for (i = 1; i < MAX_RLEN; i++) { 177 rid = i; 178 sc->irq[i].res = bus_alloc_resource_any(dev, SYS_RES_IRQ, 179 &rid, RF_ACTIVE | RF_SHAREABLE); 180 if (sc->irq[i].res == NULL) 181 break; 182 183 if (intr_is_per_cpu(sc->irq[i].res)) 184 { 185 device_printf(dev, "Unexpected per CPU interupt\n"); 186 err = ENXIO; 187 goto done; 188 } 189 190 if (has_affinity && i >= ncpus) { 191 device_printf(dev, "Missing value in interrupt " 192 "affinity property\n"); 193 err = ENXIO; 194 goto done; 195 } 196 197 err = pmu_parse_affinity(dev, sc, sc->irq + i, 198 has_affinity ? cpus[i] : 0, i); 199 if (err != 0) { 200 device_printf(dev, 201 "Cannot parse affinity for CPUid: %d.\n", i); 202 goto done; 203 } 204 } 205 err = 0; 206 done: 207 OF_prop_free(cpus); 208 return (err); 209 } 210 211 static int 212 pmu_fdt_attach(device_t dev) 213 { 214 struct pmu_softc *sc; 215 int err; 216 217 sc = device_get_softc(dev); 218 err = pmu_parse_intr(dev, sc); 219 if (err != 0) 220 return (err); 221 222 return (pmu_attach(dev)); 223 } 224 225 static device_method_t pmu_fdt_methods[] = { 226 DEVMETHOD(device_probe, pmu_fdt_probe), 227 DEVMETHOD(device_attach, pmu_fdt_attach), 228 { 0, 0 } 229 }; 230 231 static driver_t pmu_fdt_driver = { 232 "pmu", 233 pmu_fdt_methods, 234 sizeof(struct pmu_softc), 235 }; 236 237 DRIVER_MODULE(pmu, simplebus, pmu_fdt_driver, 0, 0); 238