gicv3_acpi.c revision 1.3.8.1
1 /* $NetBSD: gicv3_acpi.c,v 1.3.8.1 2019/09/22 12:42:12 martin Exp $ */ 2 3 /*- 4 * Copyright (c) 2018 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Jared McNeill <jmcneill (at) invisible.ca>. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include "pci.h" 33 34 #define _INTR_PRIVATE 35 36 #include <sys/cdefs.h> 37 __KERNEL_RCSID(0, "$NetBSD: gicv3_acpi.c,v 1.3.8.1 2019/09/22 12:42:12 martin Exp $"); 38 39 #include <sys/param.h> 40 #include <sys/bus.h> 41 #include <sys/cpu.h> 42 #include <sys/kernel.h> 43 #include <sys/device.h> 44 #include <sys/kmem.h> 45 46 #include <dev/acpi/acpireg.h> 47 #include <dev/acpi/acpivar.h> 48 49 #include <dev/fdt/fdtvar.h> 50 51 #include <arm/cortex/gicv3.h> 52 #include <arm/cortex/gicv3_its.h> 53 #include <arm/cortex/gic_reg.h> 54 55 #define GICD_SIZE 0x10000 56 #define GICR_SIZE 0x20000 57 #define GITS_SIZE 0x20000 58 59 extern struct bus_space arm_generic_bs_tag; 60 extern struct arm32_bus_dma_tag arm_generic_dma_tag; 61 62 struct gicv3_acpi_softc { 63 struct gicv3_softc sc_gic; 64 65 ACPI_MADT_GENERIC_DISTRIBUTOR *sc_madt_gicd; 66 }; 67 68 static int gicv3_acpi_match(device_t, cfdata_t, void *); 69 static void gicv3_acpi_attach(device_t, device_t, void *); 70 71 static int gicv3_acpi_map_dist(struct gicv3_acpi_softc *); 72 static int gicv3_acpi_map_redist(struct gicv3_acpi_softc *); 73 #if NPCI > 0 74 static int gicv3_acpi_map_its(struct gicv3_acpi_softc *); 75 #endif 76 77 CFATTACH_DECL_NEW(gicv3_acpi, sizeof(struct gicv3_acpi_softc), gicv3_acpi_match, gicv3_acpi_attach, NULL, NULL); 78 79 static int 80 gicv3_acpi_match(device_t parent, cfdata_t cf, void *aux) 81 { 82 ACPI_SUBTABLE_HEADER *hdrp = aux; 83 ACPI_MADT_GENERIC_DISTRIBUTOR *gicd; 84 85 if (hdrp->Type != ACPI_MADT_TYPE_GENERIC_DISTRIBUTOR) 86 return 0; 87 88 gicd = (ACPI_MADT_GENERIC_DISTRIBUTOR *)hdrp; 89 90 switch (gicd->Version) { 91 case ACPI_MADT_GIC_VERSION_NONE: 92 return __SHIFTOUT(reg_id_aa64pfr0_el1_read(), ID_AA64PFR0_EL1_GIC) == 1; 93 case ACPI_MADT_GIC_VERSION_V3: 94 case ACPI_MADT_GIC_VERSION_V4: 95 return 1; 96 default: 97 return 0; 98 } 99 } 100 101 static void 102 gicv3_acpi_attach(device_t parent, device_t self, void *aux) 103 { 104 struct gicv3_acpi_softc * const sc = device_private(self); 105 ACPI_MADT_GENERIC_DISTRIBUTOR *gicd = aux; 106 int error; 107 108 sc->sc_gic.sc_dev = self; 109 sc->sc_gic.sc_bst = &arm_generic_bs_tag; 110 sc->sc_gic.sc_dmat = &arm_generic_dma_tag; 111 sc->sc_madt_gicd = gicd; 112 113 aprint_naive("\n"); 114 aprint_normal(": GICv3\n"); 115 116 error = gicv3_acpi_map_dist(sc); 117 if (error) { 118 aprint_error_dev(self, "failed to map distributor: %d\n", error); 119 return; 120 } 121 122 error = gicv3_acpi_map_redist(sc); 123 if (error) { 124 aprint_error_dev(self, "failed to map redistributor: %d\n", error); 125 return; 126 } 127 128 error = gicv3_init(&sc->sc_gic); 129 if (error) { 130 aprint_error_dev(self, "failed to initialize GIC: %d\n", error); 131 return; 132 } 133 134 #if NPCI > 0 135 gicv3_acpi_map_its(sc); 136 #endif 137 138 arm_fdt_irq_set_handler(gicv3_irq_handler); 139 } 140 141 static int 142 gicv3_acpi_map_dist(struct gicv3_acpi_softc *sc) 143 { 144 const bus_addr_t addr = sc->sc_madt_gicd->BaseAddress; 145 const bus_size_t size = GICD_SIZE; 146 int error; 147 148 error = bus_space_map(sc->sc_gic.sc_bst, addr, size, 0, &sc->sc_gic.sc_bsh_d); 149 if (error) 150 return error; 151 152 return 0; 153 } 154 155 static ACPI_STATUS 156 gicv3_acpi_count_gicr(ACPI_SUBTABLE_HEADER *hdrp, void *aux) 157 { 158 ACPI_MADT_GENERIC_REDISTRIBUTOR *gicr; 159 int *count = aux; 160 161 if (hdrp->Type == ACPI_MADT_TYPE_GENERIC_REDISTRIBUTOR) { 162 gicr = (ACPI_MADT_GENERIC_REDISTRIBUTOR *)hdrp; 163 *count += howmany(gicr->Length, GICR_SIZE); 164 } 165 166 return AE_OK; 167 } 168 169 static ACPI_STATUS 170 gicv3_acpi_map_gicr(ACPI_SUBTABLE_HEADER *hdrp, void *aux) 171 { 172 struct gicv3_acpi_softc * const sc = aux; 173 ACPI_MADT_GENERIC_REDISTRIBUTOR *gicr; 174 bus_space_handle_t bsh; 175 bus_size_t off; 176 177 if (hdrp->Type != ACPI_MADT_TYPE_GENERIC_REDISTRIBUTOR) 178 return AE_OK; 179 180 gicr = (ACPI_MADT_GENERIC_REDISTRIBUTOR *)hdrp; 181 182 if (bus_space_map(sc->sc_gic.sc_bst, gicr->BaseAddress, gicr->Length, 0, &bsh) != 0) { 183 aprint_error_dev(sc->sc_gic.sc_dev, "failed to map redistributor at 0x%" PRIx64 " len %#x\n", 184 gicr->BaseAddress, gicr->Length); 185 return AE_OK; 186 } 187 188 for (off = 0; off < gicr->Length; off += GICR_SIZE) { 189 const int redist = sc->sc_gic.sc_bsh_r_count; 190 if (bus_space_subregion(sc->sc_gic.sc_bst, bsh, off, GICR_SIZE, &sc->sc_gic.sc_bsh_r[redist]) != 0) { 191 aprint_error_dev(sc->sc_gic.sc_dev, "couldn't subregion redistributor registers\n"); 192 return AE_OK; 193 } 194 195 aprint_debug_dev(sc->sc_gic.sc_dev, "redist at 0x%" PRIx64 " [GICR]\n", gicr->BaseAddress + off); 196 197 sc->sc_gic.sc_bsh_r_count++; 198 199 /* If this is the last redist in this region, skip to the next one */ 200 const uint32_t typer = bus_space_read_4(sc->sc_gic.sc_bst, sc->sc_gic.sc_bsh_r[redist], GICR_TYPER); 201 if (typer & GICR_TYPER_Last) 202 break; 203 204 /* If the redistributor supports virtual LPIs, skip the VLPI register region */ 205 if (typer & GICR_TYPER_VLPIS) 206 off += GICR_SIZE; 207 } 208 209 return AE_OK; 210 } 211 212 static ACPI_STATUS 213 gicv3_acpi_count_gicc(ACPI_SUBTABLE_HEADER *hdrp, void *aux) 214 { 215 ACPI_MADT_GENERIC_INTERRUPT *gicc; 216 int *count = aux; 217 218 if (hdrp->Type == ACPI_MADT_TYPE_GENERIC_INTERRUPT) { 219 gicc = (ACPI_MADT_GENERIC_INTERRUPT *)hdrp; 220 if ((gicc->Flags & ACPI_MADT_ENABLED) != 0) 221 (*count)++; 222 } 223 224 return AE_OK; 225 } 226 227 static ACPI_STATUS 228 gicv3_acpi_map_gicc(ACPI_SUBTABLE_HEADER *hdrp, void *aux) 229 { 230 struct gicv3_acpi_softc * const sc = aux; 231 ACPI_MADT_GENERIC_INTERRUPT *gicc; 232 233 if (hdrp->Type != ACPI_MADT_TYPE_GENERIC_INTERRUPT) 234 return AE_OK; 235 236 gicc = (ACPI_MADT_GENERIC_INTERRUPT *)hdrp; 237 if ((gicc->Flags & ACPI_MADT_ENABLED) == 0) 238 return AE_OK; 239 240 const int redist = sc->sc_gic.sc_bsh_r_count; 241 if (bus_space_map(sc->sc_gic.sc_bst, gicc->GicrBaseAddress, GICR_SIZE, 0, &sc->sc_gic.sc_bsh_r[redist]) != 0) { 242 aprint_error_dev(sc->sc_gic.sc_dev, "failed to map redistributor at 0x%" PRIx64 " len %#x\n", 243 gicc->GicrBaseAddress, GICR_SIZE); 244 return AE_OK; 245 } 246 247 aprint_debug_dev(sc->sc_gic.sc_dev, "redist at 0x%" PRIx64 " [GICC]\n", gicc->GicrBaseAddress); 248 249 sc->sc_gic.sc_bsh_r_count++; 250 251 return AE_OK; 252 } 253 254 static int 255 gicv3_acpi_map_redist(struct gicv3_acpi_softc *sc) 256 { 257 bool use_gicr = false; 258 int max_redist = 0; 259 260 /* 261 * Try to use GICR structures to describe redistributors. If no GICR 262 * subtables are found, use the GICR address from the GICC subtables. 263 */ 264 acpi_madt_walk(gicv3_acpi_count_gicr, &max_redist); 265 if (max_redist != 0) 266 use_gicr = true; 267 else 268 acpi_madt_walk(gicv3_acpi_count_gicc, &max_redist); 269 270 if (max_redist == 0) 271 return ENODEV; 272 273 sc->sc_gic.sc_bsh_r = kmem_alloc(sizeof(bus_space_handle_t) * max_redist, KM_SLEEP); 274 if (use_gicr) 275 acpi_madt_walk(gicv3_acpi_map_gicr, sc); 276 else 277 acpi_madt_walk(gicv3_acpi_map_gicc, sc); 278 279 if (sc->sc_gic.sc_bsh_r_count == 0) 280 return ENXIO; 281 282 return 0; 283 } 284 285 #if NPCI > 0 286 static ACPI_STATUS 287 gicv3_acpi_map_gits(ACPI_SUBTABLE_HEADER *hdrp, void *aux) 288 { 289 struct gicv3_acpi_softc * const sc = aux; 290 ACPI_MADT_GENERIC_TRANSLATOR *gits; 291 bus_space_handle_t bsh; 292 293 if (hdrp->Type != ACPI_MADT_TYPE_GENERIC_TRANSLATOR) 294 return AE_OK; 295 296 gits = (ACPI_MADT_GENERIC_TRANSLATOR *)hdrp; 297 298 if (bus_space_map(sc->sc_gic.sc_bst, gits->BaseAddress, GITS_SIZE, 0, &bsh) != 0) { 299 aprint_error_dev(sc->sc_gic.sc_dev, "failed to map ITS at 0x%" PRIx64 " len %#x\n", 300 gits->BaseAddress, GITS_SIZE); 301 return AE_OK; 302 } 303 304 aprint_normal_dev(sc->sc_gic.sc_dev, "ITS #%#x at 0x%" PRIx64 "\n", gits->TranslationId, gits->BaseAddress); 305 306 gicv3_its_init(&sc->sc_gic, bsh, gits->BaseAddress, gits->TranslationId); 307 308 return AE_OK; 309 } 310 311 static int 312 gicv3_acpi_map_its(struct gicv3_acpi_softc *sc) 313 { 314 acpi_madt_walk(gicv3_acpi_map_gits, sc); 315 316 return 0; 317 } 318 #endif 319
Indexes created Tue Oct 21 16:10:11 GMT 2025