freebsd-dev/sys/arm64/iommu/smmu_acpi.c

295 lines
7.2 KiB
C

/*-
* 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/rman.h>
#include <sys/tree.h>
#include <sys/taskqueue.h>
#include <sys/malloc.h>
#include <sys/module.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 <arm64/iommu/iommu.h>
#include "smmuvar.h"
#define MEMORY_RESOURCE_SIZE 0x20000
#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]->PriGsiv, 1);
BUS_SET_RESOURCE(parent, dev, SYS_RES_IRQ, 2,
iort_data.smmu[i]->SyncGsiv, 1);
BUS_SET_RESOURCE(parent, dev, SYS_RES_IRQ, 3,
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;
struct smmu_unit *unit;
struct iommu_unit *iommu;
uintptr_t priv;
int err;
int rid;
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);
rid = 0;
sc->res[0] = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
RF_ACTIVE);
if (sc->res[0] == NULL) {
device_printf(dev, "Can't allocate memory resource.\n");
err = ENXIO;
goto error;
}
/*
* Interrupt lines are "eventq", "priq", "cmdq-sync", "gerror".
*/
rid = 0;
sc->res[1] = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, RF_ACTIVE);
if (sc->res[1] == NULL) {
device_printf(dev, "Can't allocate eventq IRQ resource.\n");
err = ENXIO;
goto error;
}
rid = 2;
sc->res[3] = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, RF_ACTIVE);
if (sc->res[3] == NULL) {
device_printf(dev, "Can't allocate cmdq-sync IRQ resource.\n");
err = ENXIO;
goto error;
}
rid = 3;
sc->res[4] = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, RF_ACTIVE);
if (sc->res[4] == NULL) {
device_printf(dev, "Can't allocate gerror IRQ resource.\n");
err = ENXIO;
goto error;
}
err = smmu_attach(dev);
if (err != 0)
goto error;
unit = &sc->unit;
unit->dev = dev;
iommu = &unit->iommu;
iommu->dev = dev;
LIST_INIT(&unit->domain_list);
/* Use memory start address as an xref. */
sc->xref = bus_get_resource_start(dev, SYS_RES_MEMORY, 0);
err = iommu_register(iommu);
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);
EARLY_DRIVER_MODULE(smmu, acpi, smmu_acpi_driver, 0, 0,
BUS_PASS_INTERRUPT + BUS_PASS_ORDER_MIDDLE);