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 #include <sys/param.h> 33 #include <sys/systm.h> 34 #include <sys/bus.h> 35 #include <sys/kernel.h> 36 #include <sys/module.h> 37 #include <sys/rman.h> 38 39 #include <dev/ofw/openfirm.h> 40 #include <dev/ofw/ofw_bus.h> 41 #include <dev/ofw/ofw_bus_subr.h> 42 43 #include "pmu.h" 44 45 static struct ofw_compat_data compat_data[] = { 46 {"arm,armv8-pmuv3", 1}, 47 {"arm,cortex-a77-pmu", 1}, 48 {"arm,cortex-a76-pmu", 1}, 49 {"arm,cortex-a75-pmu", 1}, 50 {"arm,cortex-a73-pmu", 1}, 51 {"arm,cortex-a72-pmu", 1}, 52 {"arm,cortex-a65-pmu", 1}, 53 {"arm,cortex-a57-pmu", 1}, 54 {"arm,cortex-a55-pmu", 1}, 55 {"arm,cortex-a53-pmu", 1}, 56 {"arm,cortex-a34-pmu", 1}, 57 58 {"arm,cortex-a17-pmu", 1}, 59 {"arm,cortex-a15-pmu", 1}, 60 {"arm,cortex-a12-pmu", 1}, 61 {"arm,cortex-a9-pmu", 1}, 62 {"arm,cortex-a8-pmu", 1}, 63 {"arm,cortex-a7-pmu", 1}, 64 {"arm,cortex-a5-pmu", 1}, 65 {"arm,arm11mpcore-pmu", 1}, 66 {"arm,arm1176-pmu", 1}, 67 {"arm,arm1136-pmu", 1}, 68 {"qcom,krait-pmu", 1}, 69 {NULL, 0} 70 }; 71 72 static int 73 pmu_fdt_probe(device_t dev) 74 { 75 76 if (!ofw_bus_status_okay(dev)) 77 return (ENXIO); 78 79 if (ofw_bus_search_compatible(dev, compat_data)->ocd_data != 0) { 80 device_set_desc(dev, "Performance Monitoring Unit"); 81 return (BUS_PROBE_DEFAULT); 82 } 83 84 return (ENXIO); 85 } 86 87 static int 88 pmu_parse_affinity(device_t dev, struct pmu_softc *sc, struct pmu_intr *irq, 89 phandle_t xref, uint32_t mpidr) 90 { 91 struct pcpu *pcpu; 92 int i, err; 93 94 95 if (xref != 0) { 96 err = OF_getencprop(OF_node_from_xref(xref), "reg", &mpidr, 97 sizeof(mpidr)); 98 if (err < 0) { 99 device_printf(dev, "missing 'reg' property\n"); 100 return (ENXIO); 101 } 102 } 103 104 for (i = 0; i < MAXCPU; i++) { 105 pcpu = pcpu_find(i); 106 if (pcpu != NULL && PCPU_GET_MPIDR(pcpu) == mpidr) { 107 irq->cpuid = i; 108 return (0); 109 } 110 } 111 112 device_printf(dev, "Cannot find CPU with MPIDR: 0x%08X\n", mpidr); 113 return (ENXIO); 114 } 115 116 static int 117 pmu_parse_intr(device_t dev, struct pmu_softc *sc) 118 { 119 bool has_affinity; 120 phandle_t node, *cpus; 121 int rid, err, ncpus, i; 122 123 124 node = ofw_bus_get_node(dev); 125 has_affinity = OF_hasprop(node, "interrupt-affinity"); 126 127 for (i = 0; i < MAX_RLEN; i++) 128 sc->irq[i].cpuid = -1; 129 130 cpus = NULL; 131 if (has_affinity) { 132 ncpus = OF_getencprop_alloc_multi(node, "interrupt-affinity", 133 sizeof(*cpus), (void **)&cpus); 134 if (ncpus < 0) { 135 device_printf(dev, 136 "Cannot read interrupt affinity property\n"); 137 return (ENXIO); 138 } 139 } 140 141 /* Process first interrupt */ 142 rid = 0; 143 sc->irq[0].res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, 144 RF_ACTIVE | RF_SHAREABLE); 145 146 if (sc->irq[0].res == NULL) { 147 device_printf(dev, "Cannot get interrupt\n"); 148 err = ENXIO; 149 goto done; 150 } 151 152 /* Check if PMU have one per-CPU interrupt */ 153 if (intr_is_per_cpu(sc->irq[0].res)) { 154 if (has_affinity) { 155 device_printf(dev, 156 "Per CPU interupt have declared affinity\n"); 157 err = ENXIO; 158 goto done; 159 } 160 return (0); 161 } 162 163 /* 164 * PMU with set of generic interrupts (one per core) 165 * Each one must be binded to exact core. 166 */ 167 err = pmu_parse_affinity(dev, sc, sc->irq + 0, 168 has_affinity ? cpus[0] : 0, 0); 169 if (err != 0) { 170 device_printf(dev, "Cannot parse affinity for CPUid: 0\n"); 171 goto done; 172 } 173 174 for (i = 1; i < MAX_RLEN; i++) { 175 rid = i; 176 sc->irq[i].res = bus_alloc_resource_any(dev, SYS_RES_IRQ, 177 &rid, RF_ACTIVE | RF_SHAREABLE); 178 if (sc->irq[i].res == NULL) 179 break; 180 181 if (intr_is_per_cpu(sc->irq[i].res)) 182 { 183 device_printf(dev, "Unexpected per CPU interupt\n"); 184 err = ENXIO; 185 goto done; 186 } 187 188 if (has_affinity && i >= ncpus) { 189 device_printf(dev, "Missing value in interrupt " 190 "affinity property\n"); 191 err = ENXIO; 192 goto done; 193 } 194 195 err = pmu_parse_affinity(dev, sc, sc->irq + i, 196 has_affinity ? cpus[i] : 0, i); 197 if (err != 0) { 198 device_printf(dev, 199 "Cannot parse affinity for CPUid: %d.\n", i); 200 goto done; 201 } 202 } 203 err = 0; 204 done: 205 OF_prop_free(cpus); 206 return (err); 207 } 208 209 static int 210 pmu_fdt_attach(device_t dev) 211 { 212 struct pmu_softc *sc; 213 int err; 214 215 sc = device_get_softc(dev); 216 err = pmu_parse_intr(dev, sc); 217 if (err != 0) 218 return (err); 219 220 return (pmu_attach(dev)); 221 } 222 223 static device_method_t pmu_fdt_methods[] = { 224 DEVMETHOD(device_probe, pmu_fdt_probe), 225 DEVMETHOD(device_attach, pmu_fdt_attach), 226 { 0, 0 } 227 }; 228 229 static driver_t pmu_fdt_driver = { 230 "pmu", 231 pmu_fdt_methods, 232 sizeof(struct pmu_softc), 233 }; 234 235 DRIVER_MODULE(pmu, simplebus, pmu_fdt_driver, 0, 0); 236