/* $NetBSD: gicv3_acpi.c,v 1.3.8.2 2019/10/15 19:40:34 martin Exp $ */ /*- * Copyright (c) 2018 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Jared McNeill . * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ #include "pci.h" #define _INTR_PRIVATE #include __KERNEL_RCSID(0, "$NetBSD: gicv3_acpi.c,v 1.3.8.2 2019/10/15 19:40:34 martin Exp $"); #include #include #include #include #include #include #include #include #include #include #include #include #include #define GICD_SIZE 0x10000 #define GICR_SIZE 0x20000 #define GITS_SIZE 0x20000 extern struct bus_space arm_generic_bs_tag; extern struct arm32_bus_dma_tag arm_generic_dma_tag; struct gicv3_acpi_softc { struct gicv3_softc sc_gic; ACPI_MADT_GENERIC_DISTRIBUTOR *sc_madt_gicd; }; static int gicv3_acpi_match(device_t, cfdata_t, void *); static void gicv3_acpi_attach(device_t, device_t, void *); static int gicv3_acpi_map_dist(struct gicv3_acpi_softc *); static int gicv3_acpi_map_redist(struct gicv3_acpi_softc *); #if NPCI > 0 static int gicv3_acpi_map_msi(struct gicv3_acpi_softc *); #endif CFATTACH_DECL_NEW(gicv3_acpi, sizeof(struct gicv3_acpi_softc), gicv3_acpi_match, gicv3_acpi_attach, NULL, NULL); static int gicv3_acpi_match(device_t parent, cfdata_t cf, void *aux) { ACPI_SUBTABLE_HEADER *hdrp = aux; ACPI_MADT_GENERIC_DISTRIBUTOR *gicd; if (hdrp->Type != ACPI_MADT_TYPE_GENERIC_DISTRIBUTOR) return 0; gicd = (ACPI_MADT_GENERIC_DISTRIBUTOR *)hdrp; switch (gicd->Version) { case ACPI_MADT_GIC_VERSION_NONE: return __SHIFTOUT(reg_id_aa64pfr0_el1_read(), ID_AA64PFR0_EL1_GIC) == 1; case ACPI_MADT_GIC_VERSION_V3: case ACPI_MADT_GIC_VERSION_V4: return 1; default: return 0; } } static void gicv3_acpi_attach(device_t parent, device_t self, void *aux) { struct gicv3_acpi_softc * const sc = device_private(self); ACPI_MADT_GENERIC_DISTRIBUTOR *gicd = aux; int error; sc->sc_gic.sc_dev = self; sc->sc_gic.sc_bst = &arm_generic_bs_tag; sc->sc_gic.sc_dmat = &arm_generic_dma_tag; sc->sc_madt_gicd = gicd; aprint_naive("\n"); aprint_normal(": GICv3\n"); error = gicv3_acpi_map_dist(sc); if (error) { aprint_error_dev(self, "failed to map distributor: %d\n", error); return; } error = gicv3_acpi_map_redist(sc); if (error) { aprint_error_dev(self, "failed to map redistributor: %d\n", error); return; } error = gicv3_init(&sc->sc_gic); if (error) { aprint_error_dev(self, "failed to initialize GIC: %d\n", error); return; } #if NPCI > 0 gicv3_acpi_map_msi(sc); #endif arm_fdt_irq_set_handler(gicv3_irq_handler); } static int gicv3_acpi_map_dist(struct gicv3_acpi_softc *sc) { const bus_addr_t addr = sc->sc_madt_gicd->BaseAddress; const bus_size_t size = GICD_SIZE; int error; error = bus_space_map(sc->sc_gic.sc_bst, addr, size, 0, &sc->sc_gic.sc_bsh_d); if (error) return error; return 0; } static ACPI_STATUS gicv3_acpi_count_gicr(ACPI_SUBTABLE_HEADER *hdrp, void *aux) { ACPI_MADT_GENERIC_REDISTRIBUTOR *gicr; int *count = aux; if (hdrp->Type == ACPI_MADT_TYPE_GENERIC_REDISTRIBUTOR) { gicr = (ACPI_MADT_GENERIC_REDISTRIBUTOR *)hdrp; *count += howmany(gicr->Length, GICR_SIZE); } return AE_OK; } static ACPI_STATUS gicv3_acpi_map_gicr(ACPI_SUBTABLE_HEADER *hdrp, void *aux) { struct gicv3_acpi_softc * const sc = aux; ACPI_MADT_GENERIC_REDISTRIBUTOR *gicr; bus_space_handle_t bsh; bus_size_t off; if (hdrp->Type != ACPI_MADT_TYPE_GENERIC_REDISTRIBUTOR) return AE_OK; gicr = (ACPI_MADT_GENERIC_REDISTRIBUTOR *)hdrp; if (bus_space_map(sc->sc_gic.sc_bst, gicr->BaseAddress, gicr->Length, 0, &bsh) != 0) { aprint_error_dev(sc->sc_gic.sc_dev, "failed to map redistributor at 0x%" PRIx64 " len %#x\n", gicr->BaseAddress, gicr->Length); return AE_OK; } for (off = 0; off < gicr->Length; off += GICR_SIZE) { const int redist = sc->sc_gic.sc_bsh_r_count; if (bus_space_subregion(sc->sc_gic.sc_bst, bsh, off, GICR_SIZE, &sc->sc_gic.sc_bsh_r[redist]) != 0) { aprint_error_dev(sc->sc_gic.sc_dev, "couldn't subregion redistributor registers\n"); return AE_OK; } aprint_debug_dev(sc->sc_gic.sc_dev, "redist at 0x%" PRIx64 " [GICR]\n", gicr->BaseAddress + off); sc->sc_gic.sc_bsh_r_count++; /* If this is the last redist in this region, skip to the next one */ const uint32_t typer = bus_space_read_4(sc->sc_gic.sc_bst, sc->sc_gic.sc_bsh_r[redist], GICR_TYPER); if (typer & GICR_TYPER_Last) break; /* If the redistributor supports virtual LPIs, skip the VLPI register region */ if (typer & GICR_TYPER_VLPIS) off += GICR_SIZE; } return AE_OK; } static ACPI_STATUS gicv3_acpi_count_gicc(ACPI_SUBTABLE_HEADER *hdrp, void *aux) { ACPI_MADT_GENERIC_INTERRUPT *gicc; int *count = aux; if (hdrp->Type == ACPI_MADT_TYPE_GENERIC_INTERRUPT) { gicc = (ACPI_MADT_GENERIC_INTERRUPT *)hdrp; if ((gicc->Flags & ACPI_MADT_ENABLED) != 0) (*count)++; } return AE_OK; } static ACPI_STATUS gicv3_acpi_map_gicc(ACPI_SUBTABLE_HEADER *hdrp, void *aux) { struct gicv3_acpi_softc * const sc = aux; ACPI_MADT_GENERIC_INTERRUPT *gicc; if (hdrp->Type != ACPI_MADT_TYPE_GENERIC_INTERRUPT) return AE_OK; gicc = (ACPI_MADT_GENERIC_INTERRUPT *)hdrp; if ((gicc->Flags & ACPI_MADT_ENABLED) == 0) return AE_OK; const int redist = sc->sc_gic.sc_bsh_r_count; if (bus_space_map(sc->sc_gic.sc_bst, gicc->GicrBaseAddress, GICR_SIZE, 0, &sc->sc_gic.sc_bsh_r[redist]) != 0) { aprint_error_dev(sc->sc_gic.sc_dev, "failed to map redistributor at 0x%" PRIx64 " len %#x\n", gicc->GicrBaseAddress, GICR_SIZE); return AE_OK; } aprint_debug_dev(sc->sc_gic.sc_dev, "redist at 0x%" PRIx64 " [GICC]\n", gicc->GicrBaseAddress); sc->sc_gic.sc_bsh_r_count++; return AE_OK; } static int gicv3_acpi_map_redist(struct gicv3_acpi_softc *sc) { bool use_gicr = false; int max_redist = 0; /* * Try to use GICR structures to describe redistributors. If no GICR * subtables are found, use the GICR address from the GICC subtables. */ acpi_madt_walk(gicv3_acpi_count_gicr, &max_redist); if (max_redist != 0) use_gicr = true; else acpi_madt_walk(gicv3_acpi_count_gicc, &max_redist); if (max_redist == 0) return ENODEV; sc->sc_gic.sc_bsh_r = kmem_alloc(sizeof(bus_space_handle_t) * max_redist, KM_SLEEP); if (use_gicr) acpi_madt_walk(gicv3_acpi_map_gicr, sc); else acpi_madt_walk(gicv3_acpi_map_gicc, sc); if (sc->sc_gic.sc_bsh_r_count == 0) return ENXIO; return 0; } #if NPCI > 0 static ACPI_STATUS gicv3_acpi_map_gits(ACPI_SUBTABLE_HEADER *hdrp, void *aux) { struct gicv3_acpi_softc * const sc = aux; ACPI_MADT_GENERIC_TRANSLATOR *gits; bus_space_handle_t bsh; if (hdrp->Type != ACPI_MADT_TYPE_GENERIC_TRANSLATOR) return AE_OK; gits = (ACPI_MADT_GENERIC_TRANSLATOR *)hdrp; if (bus_space_map(sc->sc_gic.sc_bst, gits->BaseAddress, GITS_SIZE, 0, &bsh) != 0) { aprint_error_dev(sc->sc_gic.sc_dev, "failed to map ITS at 0x%" PRIx64 " len %#x\n", gits->BaseAddress, GITS_SIZE); return AE_OK; } aprint_normal_dev(sc->sc_gic.sc_dev, "ITS #%#x at 0x%" PRIx64 "\n", gits->TranslationId, gits->BaseAddress); gicv3_its_init(&sc->sc_gic, bsh, gits->BaseAddress, gits->TranslationId); return AE_OK; } static int gicv3_acpi_map_msi(struct gicv3_acpi_softc *sc) { acpi_madt_walk(gicv3_acpi_map_gits, sc); acpi_madt_walk(gic_v2m_acpi_find_msi_frame, sc->sc_gic.sc_dev); return 0; } #endif