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/* $OpenBSD: smmu_fdt.c,v 1.1 2021/02/28 21:39:31 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 <machine/bus.h>
#include <machine/fdt.h>
#include <machine/intr.h>
#include <dev/ofw/openfirm.h>
#include <dev/ofw/ofw_misc.h>
#include <dev/ofw/fdt.h>
#include <dev/pci/pcivar.h>
#include <arm64/dev/smmuvar.h>
#include <arm64/dev/smmureg.h>
struct smmu_fdt_softc {
struct smmu_softc sc_smmu;
struct iommu_device sc_id;
};
int smmu_fdt_match(struct device *, void *, void *);
void smmu_fdt_attach(struct device *, struct device *, void *);
bus_dma_tag_t smmu_fdt_map(void *, uint32_t *, bus_dma_tag_t);
struct cfattach smmu_fdt_ca = {
sizeof(struct smmu_fdt_softc), smmu_fdt_match, smmu_fdt_attach
};
int
smmu_fdt_match(struct device *parent, void *match, void *aux)
{
struct fdt_attach_args *faa = aux;
return (OF_is_compatible(faa->fa_node, "arm,smmu-v2") ||
OF_is_compatible(faa->fa_node, "arm,mmu-500"));
}
void
smmu_fdt_attach(struct device *parent, struct device *self, void *aux)
{
struct smmu_fdt_softc *fsc = (struct smmu_fdt_softc *)self;
struct smmu_softc *sc = &fsc->sc_smmu;
struct fdt_attach_args *faa = aux;
uint32_t ngirq;
int i;
if (faa->fa_nreg < 1) {
printf(": no registers\n");
return;
}
sc->sc_iot = faa->fa_iot;
if (bus_space_map(sc->sc_iot, faa->fa_reg[0].addr,
faa->fa_reg[0].size, 0, &sc->sc_ioh)) {
printf(": can't map registers\n");
return;
}
if (OF_is_compatible(faa->fa_node, "arm,mmu-500"))
sc->sc_is_mmu500 = 1;
if (OF_is_compatible(faa->fa_node, "marvell,ap806-smmu-500"))
sc->sc_is_ap806 = 1;
if (OF_getproplen(faa->fa_node, "dma-coherent") == 0)
sc->sc_coherent = 1;
if (smmu_attach(sc) != 0)
return;
ngirq = OF_getpropint(faa->fa_node, "#global-interrupts", 1);
for (i = 0; i < ngirq; i++) {
fdt_intr_establish_idx(faa->fa_node, i, IPL_TTY,
smmu_global_irq, sc, sc->sc_dev.dv_xname);
}
for (i = ngirq; ; i++) {
struct smmu_cb_irq *cbi = malloc(sizeof(*cbi),
M_DEVBUF, M_WAITOK);
cbi->cbi_sc = sc;
cbi->cbi_idx = i - ngirq;
if (fdt_intr_establish_idx(faa->fa_node, i, IPL_TTY,
smmu_context_irq, cbi, sc->sc_dev.dv_xname) == NULL) {
free(cbi, M_DEVBUF, sizeof(*cbi));
break;
}
}
fsc->sc_id.id_node = faa->fa_node;
fsc->sc_id.id_cookie = fsc;
fsc->sc_id.id_map = smmu_fdt_map;
iommu_device_register(&fsc->sc_id);
}
bus_dma_tag_t
smmu_fdt_map(void *cookie, uint32_t *cells, bus_dma_tag_t dmat)
{
struct smmu_fdt_softc *fsc = (struct smmu_fdt_softc *)cookie;
struct smmu_softc *sc = &fsc->sc_smmu;
return smmu_device_hook(sc, cells[0], dmat);
}
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