236 lines
5.5 KiB
C
236 lines
5.5 KiB
C
/*-
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*
|
|
* Copyright (c) 2019 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 <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/bus.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/module.h>
|
|
#include <sys/malloc.h>
|
|
#include <sys/rman.h>
|
|
#include <sys/timeet.h>
|
|
#include <sys/timetc.h>
|
|
#include <sys/conf.h>
|
|
#include <sys/uio.h>
|
|
#include <sys/endian.h>
|
|
|
|
#include <dev/ofw/openfirm.h>
|
|
#include <dev/ofw/ofw_bus.h>
|
|
#include <dev/ofw/ofw_bus_subr.h>
|
|
|
|
#include <machine/cache.h>
|
|
#include <machine/bus.h>
|
|
#include <machine/cpu.h>
|
|
#include <machine/intr.h>
|
|
|
|
#include <dev/xdma/xdma.h>
|
|
|
|
#include "xdma_if.h"
|
|
|
|
#define IOMMU_INVALIDATE 0x00
|
|
#define IOMMU_SET_BASE 0x08
|
|
|
|
struct beri_iommu_softc {
|
|
struct resource *res[1];
|
|
device_t dev;
|
|
bus_space_tag_t bst_data;
|
|
bus_space_handle_t bsh_data;
|
|
uint32_t offs;
|
|
};
|
|
|
|
static struct resource_spec beri_iommu_spec[] = {
|
|
{ SYS_RES_MEMORY, 0, RF_ACTIVE },
|
|
{ -1, 0 }
|
|
};
|
|
|
|
static void
|
|
beri_iommu_invalidate(struct beri_iommu_softc *sc, vm_offset_t addr)
|
|
{
|
|
|
|
bus_write_8(sc->res[0], IOMMU_INVALIDATE, htole64(addr));
|
|
}
|
|
|
|
static void
|
|
beri_iommu_set_base(struct beri_iommu_softc *sc, vm_offset_t addr)
|
|
{
|
|
|
|
bus_write_8(sc->res[0], IOMMU_SET_BASE, htole64(addr));
|
|
}
|
|
|
|
static int
|
|
beri_iommu_release(device_t dev, struct xdma_iommu *xio)
|
|
{
|
|
struct beri_iommu_softc *sc;
|
|
|
|
sc = device_get_softc(dev);
|
|
|
|
beri_iommu_set_base(sc, 0);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
beri_iommu_init(device_t dev, struct xdma_iommu *xio)
|
|
{
|
|
struct beri_iommu_softc *sc;
|
|
|
|
sc = device_get_softc(dev);
|
|
|
|
beri_iommu_set_base(sc, (uintptr_t)xio->p.pm_segtab);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
beri_iommu_remove(device_t dev, struct xdma_iommu *xio, vm_offset_t va)
|
|
{
|
|
struct beri_iommu_softc *sc;
|
|
|
|
sc = device_get_softc(dev);
|
|
|
|
beri_iommu_invalidate(sc, va);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
beri_iommu_enter(device_t dev, struct xdma_iommu *xio, vm_offset_t va,
|
|
vm_paddr_t pa)
|
|
{
|
|
struct beri_iommu_softc *sc;
|
|
pt_entry_t opte, npte;
|
|
pt_entry_t *pte;
|
|
pmap_t p;
|
|
|
|
sc = device_get_softc(dev);
|
|
p = &xio->p;
|
|
|
|
pte = pmap_pte(p, va);
|
|
if (pte == NULL)
|
|
panic("pte is NULL\n");
|
|
|
|
/* Make pte uncacheable. */
|
|
opte = *pte;
|
|
npte = opte & ~PTE_C_MASK;
|
|
npte |= PTE_C(VM_MEMATTR_UNCACHEABLE);
|
|
*pte = npte;
|
|
|
|
/* Write back, invalidate pte. */
|
|
mips_dcache_wbinv_range((vm_offset_t)pte, sizeof(vm_offset_t));
|
|
|
|
/* Invalidate the entry. */
|
|
if (pte_test(&opte, PTE_V) && opte != npte)
|
|
beri_iommu_invalidate(sc, va);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
beri_iommu_probe(device_t dev)
|
|
{
|
|
|
|
if (!ofw_bus_status_okay(dev))
|
|
return (ENXIO);
|
|
|
|
if (!ofw_bus_is_compatible(dev, "beri,iommu"))
|
|
return (ENXIO);
|
|
|
|
device_set_desc(dev, "BERI IOMMU");
|
|
|
|
return (BUS_PROBE_DEFAULT);
|
|
}
|
|
|
|
static int
|
|
beri_iommu_attach(device_t dev)
|
|
{
|
|
struct beri_iommu_softc *sc;
|
|
phandle_t xref, node;
|
|
|
|
sc = device_get_softc(dev);
|
|
sc->dev = dev;
|
|
|
|
if (bus_alloc_resources(dev, beri_iommu_spec, sc->res)) {
|
|
device_printf(dev, "could not allocate resources\n");
|
|
return (ENXIO);
|
|
}
|
|
|
|
/* Memory interface */
|
|
sc->bst_data = rman_get_bustag(sc->res[0]);
|
|
sc->bsh_data = rman_get_bushandle(sc->res[0]);
|
|
|
|
node = ofw_bus_get_node(dev);
|
|
xref = OF_xref_from_node(node);
|
|
OF_device_register_xref(xref, dev);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
beri_iommu_detach(device_t dev)
|
|
{
|
|
struct beri_iommu_softc *sc;
|
|
|
|
sc = device_get_softc(dev);
|
|
|
|
bus_release_resources(dev, beri_iommu_spec, sc->res);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static device_method_t beri_iommu_methods[] = {
|
|
/* xDMA IOMMU interface */
|
|
DEVMETHOD(xdma_iommu_init, beri_iommu_init),
|
|
DEVMETHOD(xdma_iommu_release, beri_iommu_release),
|
|
DEVMETHOD(xdma_iommu_enter, beri_iommu_enter),
|
|
DEVMETHOD(xdma_iommu_remove, beri_iommu_remove),
|
|
|
|
/* Device interface */
|
|
DEVMETHOD(device_probe, beri_iommu_probe),
|
|
DEVMETHOD(device_attach, beri_iommu_attach),
|
|
DEVMETHOD(device_detach, beri_iommu_detach),
|
|
{ 0, 0 }
|
|
};
|
|
|
|
static driver_t beri_iommu_driver = {
|
|
"beri_iommu",
|
|
beri_iommu_methods,
|
|
sizeof(struct beri_iommu_softc),
|
|
};
|
|
|
|
static devclass_t beri_iommu_devclass;
|
|
|
|
DRIVER_MODULE(beri_iommu, simplebus, beri_iommu_driver,
|
|
beri_iommu_devclass, 0, 0);
|