Changeset View
Changeset View
Standalone View
Standalone View
sys/arm64/iommu/smmu_acpi.c
- This file was added.
| /*- | |||||
| * SPDX-License-Identifier: BSD-2-Clause | |||||
| * | |||||
| * Copyright (c) 2019-2020 Ruslan Bukin <br@bsdpad.com> | |||||
| * | |||||
| * This software was developed by SRI International and the University of | |||||
| * Cambridge Computer Laboratory (Department of Computer Science and | |||||
| * Technology) under DARPA contract HR0011-18-C-0016 ("ECATS"), as part of the | |||||
| * DARPA SSITH research programme. | |||||
| * | |||||
| * 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 AUTHOR 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 AUTHOR 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 "opt_acpi.h" | |||||
| #include <sys/cdefs.h> | |||||
| __FBSDID("$FreeBSD$"); | |||||
| #include <sys/types.h> | |||||
| #include <sys/systm.h> | |||||
| #include <sys/bus.h> | |||||
| #include <sys/kernel.h> | |||||
| #include <sys/malloc.h> | |||||
| #include <sys/memdesc.h> | |||||
| #include <sys/module.h> | |||||
| #include <sys/rman.h> | |||||
| #include <machine/intr.h> | |||||
| #include <machine/resource.h> | |||||
| #include <contrib/dev/acpica/include/acpi.h> | |||||
| #include <dev/acpica/acpivar.h> | |||||
| #include "smmu_reg.h" | |||||
| #include "smmu_var.h" | |||||
| #include "pic_if.h" | |||||
| /* TODO: check this */ | |||||
| #define MEMORY_RESOURCE_SIZE 0x40000 | |||||
| #define MAX_SMMU 8 | |||||
| struct smmu_acpi_devinfo { | |||||
| struct resource_list di_rl; | |||||
| }; | |||||
| struct iort_table_data { | |||||
| device_t parent; | |||||
| device_t dev; | |||||
| ACPI_IORT_SMMU_V3 *smmu[MAX_SMMU]; | |||||
| int count; | |||||
| }; | |||||
| static void | |||||
| iort_handler(ACPI_SUBTABLE_HEADER *entry, void *arg) | |||||
| { | |||||
| struct iort_table_data *iort_data; | |||||
| ACPI_IORT_NODE *node; | |||||
| int i; | |||||
| iort_data = (struct iort_table_data *)arg; | |||||
| i = iort_data->count; | |||||
| switch(entry->Type) { | |||||
| case ACPI_IORT_NODE_SMMU_V3: | |||||
| if (i == MAX_SMMU) { | |||||
| printf("SMMUv3 found, but no space available.\n"); | |||||
| break; | |||||
| } | |||||
| if (iort_data->smmu[i] != NULL) { | |||||
| if (bootverbose) | |||||
| device_printf(iort_data->parent, | |||||
| "smmu: Already have an SMMU table"); | |||||
| break; | |||||
| } | |||||
| node = (ACPI_IORT_NODE *)entry; | |||||
| iort_data->smmu[i] = (ACPI_IORT_SMMU_V3 *)node->NodeData; | |||||
| iort_data->count++; | |||||
| break; | |||||
| default: | |||||
| break; | |||||
| } | |||||
| } | |||||
| static void | |||||
| smmu_acpi_identify(driver_t *driver, device_t parent) | |||||
| { | |||||
| struct iort_table_data iort_data; | |||||
| ACPI_TABLE_IORT *iort; | |||||
| vm_paddr_t iort_pa; | |||||
| uintptr_t priv; | |||||
| device_t dev; | |||||
| int i; | |||||
| iort_pa = acpi_find_table(ACPI_SIG_IORT); | |||||
| if (iort_pa == 0) | |||||
| return; | |||||
| iort = acpi_map_table(iort_pa, ACPI_SIG_IORT); | |||||
| if (iort == NULL) { | |||||
| device_printf(parent, "smmu: Unable to map the IORT\n"); | |||||
| return; | |||||
| } | |||||
| iort_data.parent = parent; | |||||
| for (i = 0; i < MAX_SMMU; i++) | |||||
| iort_data.smmu[i] = NULL; | |||||
| iort_data.count = 0; | |||||
| acpi_walk_subtables(iort + 1, (char *)iort + iort->Header.Length, | |||||
| iort_handler, &iort_data); | |||||
| if (iort_data.count == 0) { | |||||
| device_printf(parent, "No SMMU found.\n"); | |||||
| goto out; | |||||
| } | |||||
| for (i = 0; i < iort_data.count; i++) { | |||||
| dev = BUS_ADD_CHILD(parent, | |||||
| BUS_PASS_INTERRUPT + BUS_PASS_ORDER_MIDDLE, "smmu", -1); | |||||
| if (dev == NULL) { | |||||
| device_printf(parent, "add smmu child failed\n"); | |||||
| goto out; | |||||
| } | |||||
| /* Add the IORT data */ | |||||
| BUS_SET_RESOURCE(parent, dev, SYS_RES_IRQ, 0, | |||||
| iort_data.smmu[i]->EventGsiv, 1); | |||||
| BUS_SET_RESOURCE(parent, dev, SYS_RES_IRQ, 1, | |||||
| iort_data.smmu[i]->SyncGsiv, 1); | |||||
| BUS_SET_RESOURCE(parent, dev, SYS_RES_IRQ, 2, | |||||
| iort_data.smmu[i]->GerrGsiv, 1); | |||||
| BUS_SET_RESOURCE(parent, dev, SYS_RES_MEMORY, 0, | |||||
| iort_data.smmu[i]->BaseAddress, MEMORY_RESOURCE_SIZE); | |||||
| priv = iort_data.smmu[i]->Flags; | |||||
| priv <<= 32; | |||||
| priv |= iort_data.smmu[i]->Model; | |||||
| acpi_set_private(dev, (void *)priv); | |||||
| } | |||||
| iort_data.dev = dev; | |||||
| out: | |||||
| acpi_unmap_table(iort); | |||||
| } | |||||
| static int | |||||
| smmu_acpi_probe(device_t dev) | |||||
| { | |||||
| switch((uintptr_t)acpi_get_private(dev) & 0xffffffff) { | |||||
| case ACPI_IORT_SMMU_V3_GENERIC: | |||||
| /* Generic SMMUv3 */ | |||||
| break; | |||||
| default: | |||||
| return (ENXIO); | |||||
| } | |||||
| device_set_desc(dev, SMMU_DEVSTR); | |||||
| return (BUS_PROBE_NOWILDCARD); | |||||
| } | |||||
| static int | |||||
| smmu_acpi_attach(device_t dev) | |||||
| { | |||||
| struct smmu_softc *sc; | |||||
| uintptr_t start; | |||||
| uintptr_t priv; | |||||
| int err; | |||||
| sc = device_get_softc(dev); | |||||
| sc->dev = dev; | |||||
| priv = (uintptr_t)acpi_get_private(dev); | |||||
| if ((priv >> 32) & ACPI_IORT_SMMU_V3_COHACC_OVERRIDE) | |||||
| sc->features |= SMMU_FEATURE_COHERENCY; | |||||
| if (bootverbose) | |||||
| device_printf(sc->dev, "%s: features %x\n", | |||||
| __func__, sc->features); | |||||
| err = smmu_attach(dev); | |||||
| if (err != 0) | |||||
| goto error; | |||||
| /* Use memory start address as an xref. */ | |||||
| start = bus_get_resource_start(dev, SYS_RES_MEMORY, 0); | |||||
| err = iommu_register(dev, &sc->unit, start); | |||||
| if (err) { | |||||
| device_printf(dev, "Failed to register SMMU.\n"); | |||||
| return (ENXIO); | |||||
| } | |||||
| return (0); | |||||
| error: | |||||
| if (bootverbose) { | |||||
| device_printf(dev, | |||||
| "Failed to attach. Error %d\n", err); | |||||
| } | |||||
| /* Failure so free resources. */ | |||||
| smmu_detach(dev); | |||||
| return (err); | |||||
| } | |||||
| static device_method_t smmu_acpi_methods[] = { | |||||
| /* Device interface */ | |||||
| DEVMETHOD(device_identify, smmu_acpi_identify), | |||||
| DEVMETHOD(device_probe, smmu_acpi_probe), | |||||
| DEVMETHOD(device_attach, smmu_acpi_attach), | |||||
| /* End */ | |||||
| DEVMETHOD_END | |||||
| }; | |||||
| DEFINE_CLASS_1(smmu, smmu_acpi_driver, smmu_acpi_methods, | |||||
| sizeof(struct smmu_softc), smmu_driver); | |||||
| static devclass_t smmu_acpi_devclass; | |||||
| EARLY_DRIVER_MODULE(smmu, acpi, smmu_acpi_driver, smmu_acpi_devclass, | |||||
| 0, 0, BUS_PASS_INTERRUPT + BUS_PASS_ORDER_MIDDLE); | |||||