Differential D24618 Diff 75375 sys/arm64/iommu/smmu_acpi.c

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sys/arm64/iommu/smmu_acpi.c

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				/*-
				* 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/bitstring.h>
				#include <sys/kernel.h>
				#include <sys/tree.h>
				#include <sys/taskqueue.h>
				#include <sys/malloc.h>
				#include <sys/memdesc.h>
				#include <sys/module.h>
				#include <sys/rman.h>
				#include <vm/vm.h>
				#include <vm/pmap.h>
				#include <contrib/dev/acpica/include/acpi.h>
				#include <dev/acpica/acpivar.h>
				#include <dev/pci/pcireg.h>
				#include <dev/pci/pcivar.h>
				#include <dev/iommu/iommu.h>

				#include <machine/intr.h>
				#include <machine/resource.h>
				#include <arm64/iommu/iommu.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);