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/* $OpenBSD: smmu_acpi.c,v 1.2 2021/03/15 22:48:57 patrick Exp $ */
/*
* Copyright (c) 2021 Patrick Wildt <patrick@blueri.se>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/pool.h>
#include <dev/acpi/acpireg.h>
#include <dev/acpi/acpivar.h>
#include <dev/acpi/dsdt.h>
#include <dev/pci/pcivar.h>
#include <arm64/dev/acpiiort.h>
#include <arm64/dev/smmuvar.h>
#include <arm64/dev/smmureg.h>
struct smmu_acpi_softc {
struct smmu_softc sc_smmu;
void *sc_gih;
};
int smmu_acpi_match(struct device *, void *, void *);
void smmu_acpi_attach(struct device *, struct device *, void *);
struct cfattach smmu_acpi_ca = {
sizeof(struct smmu_acpi_softc), smmu_acpi_match, smmu_acpi_attach
};
int
smmu_acpi_match(struct device *parent, void *match, void *aux)
{
struct acpiiort_attach_args *aia = aux;
struct acpi_iort_node *node = aia->aia_node;
if (node->type != ACPI_IORT_SMMU)
return 0;
return 1;
}
void
smmu_acpi_attach(struct device *parent, struct device *self, void *aux)
{
struct smmu_acpi_softc *asc = (struct smmu_acpi_softc *)self;
struct smmu_softc *sc = &asc->sc_smmu;
struct acpiiort_attach_args *aia = aux;
struct acpi_iort_node *node = aia->aia_node;
struct acpi_iort_smmu_node *smmu;
struct acpi_iort_smmu_global_interrupt *girq;
struct acpi_iort_smmu_context_interrupt *cirq;
struct acpiiort_smmu *as;
int i;
smmu = (struct acpi_iort_smmu_node *)&node[1];
printf(" addr 0x%llx/0x%llx", smmu->base_address, smmu->span);
sc->sc_dmat = aia->aia_dmat;
sc->sc_iot = aia->aia_memt;
if (bus_space_map(sc->sc_iot, smmu->base_address, smmu->span,
0, &sc->sc_ioh)) {
printf(": can't map registers\n");
return;
}
switch (smmu->model) {
case ACPI_IORT_SMMU_V1:
case ACPI_IORT_SMMU_CORELINK_MMU400:
case ACPI_IORT_SMMU_CORELINK_MMU401:
printf(": SMMUv1 is unsupported\n");
break;
case ACPI_IORT_SMMU_CORELINK_MMU500:
sc->sc_is_mmu500 = 1;
case ACPI_IORT_SMMU_V2:
case ACPI_IORT_SMMU_CAVIUM_THUNDERX:
break;
default:
printf(": unknown model %u\n", smmu->model);
return;
}
if (smmu->flags & ACPI_IORT_SMMU_COHERENT)
sc->sc_coherent = 1;
if (smmu_attach(sc) != 0)
return;
girq = (struct acpi_iort_smmu_global_interrupt *)
((char *)node + smmu->global_interrupt_offset);
asc->sc_gih = acpi_intr_establish(girq->nsgirpt_gsiv,
girq->nsgirpt_flags & ACPI_IORT_SMMU_INTR_EDGE ?
LR_EXTIRQ_MODE : 0, IPL_TTY, smmu_global_irq,
sc, sc->sc_dev.dv_xname);
if (asc->sc_gih == NULL)
return;
cirq = (struct acpi_iort_smmu_context_interrupt *)
((char *)node + smmu->context_interrupt_offset);
for (i = 0; i < smmu->number_of_context_interrupts; i++) {
struct smmu_cb_irq *cbi = malloc(sizeof(*cbi),
M_DEVBUF, M_WAITOK);
cbi->cbi_sc = sc;
cbi->cbi_idx = i;
acpi_intr_establish(cirq[i].gsiv,
cirq[i].flags & ACPI_IORT_SMMU_INTR_EDGE ?
LR_EXTIRQ_MODE : 0, IPL_TTY, smmu_context_irq,
cbi, sc->sc_dev.dv_xname);
}
as = malloc(sizeof(*as), M_DEVBUF, M_WAITOK | M_ZERO);
as->as_node = node;
as->as_cookie = sc;
as->as_map = smmu_device_map;
acpiiort_smmu_register(as);
}
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