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/*-
* Copyright (c) 2011 Nathan Whitehorn
* All rights reserved.
*
* 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/kernel.h>
#include <sys/module.h>
#include <sys/malloc.h>
#include <sys/bus.h>
#include <sys/cpu.h>
#include <machine/bus.h>
#include <machine/intr_machdep.h>
#include <dev/ofw/openfirm.h>
#include <dev/ofw/ofw_bus.h>
#include <dev/ofw/ofw_bus_subr.h>
#include <powerpc/pseries/plpar_iommu.h>
#include "iommu_if.h"
static int vdevice_probe(device_t);
static int vdevice_attach(device_t);
static const struct ofw_bus_devinfo *vdevice_get_devinfo(device_t dev,
device_t child);
static int vdevice_print_child(device_t dev, device_t child);
static struct resource_list *vdevice_get_resource_list(device_t, device_t);
static bus_dma_tag_t vdevice_get_dma_tag(device_t dev, device_t child);
/*
* VDevice devinfo
*/
struct vdevice_devinfo {
struct ofw_bus_devinfo mdi_obdinfo;
struct resource_list mdi_resources;
bus_dma_tag_t mdi_dma_tag;
};
static device_method_t vdevice_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, vdevice_probe),
DEVMETHOD(device_attach, vdevice_attach),
/* Bus interface */
DEVMETHOD(bus_add_child, bus_generic_add_child),
DEVMETHOD(bus_child_pnpinfo_str, ofw_bus_gen_child_pnpinfo_str),
DEVMETHOD(bus_print_child, vdevice_print_child),
DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
DEVMETHOD(bus_alloc_resource, bus_generic_rl_alloc_resource),
DEVMETHOD(bus_release_resource, bus_generic_rl_release_resource),
DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
DEVMETHOD(bus_get_resource_list, vdevice_get_resource_list),
/* ofw_bus interface */
DEVMETHOD(ofw_bus_get_devinfo, vdevice_get_devinfo),
DEVMETHOD(ofw_bus_get_compat, ofw_bus_gen_get_compat),
DEVMETHOD(ofw_bus_get_model, ofw_bus_gen_get_model),
DEVMETHOD(ofw_bus_get_name, ofw_bus_gen_get_name),
DEVMETHOD(ofw_bus_get_node, ofw_bus_gen_get_node),
DEVMETHOD(ofw_bus_get_type, ofw_bus_gen_get_type),
/* IOMMU interface */
DEVMETHOD(bus_get_dma_tag, vdevice_get_dma_tag),
DEVMETHOD(iommu_map, phyp_iommu_map),
DEVMETHOD(iommu_unmap, phyp_iommu_unmap),
DEVMETHOD_END
};
static driver_t vdevice_driver = {
"vdevice",
vdevice_methods,
0
};
static devclass_t vdevice_devclass;
DRIVER_MODULE(vdevice, nexus, vdevice_driver, vdevice_devclass, 0, 0);
static int
vdevice_probe(device_t dev)
{
const char *name;
name = ofw_bus_get_name(dev);
if (name == NULL || strcmp(name, "vdevice") != 0)
return (ENXIO);
if (!ofw_bus_is_compatible(dev, "IBM,vdevice"))
return (ENXIO);
device_set_desc(dev, "POWER Hypervisor Virtual Device Root");
return (0);
}
static int
vdevice_attach(device_t dev)
{
phandle_t root, child;
device_t cdev;
int icells, i, nintr, *intr;
phandle_t iparent;
struct vdevice_devinfo *dinfo;
root = ofw_bus_get_node(dev);
for (child = OF_child(root); child != 0; child = OF_peer(child)) {
dinfo = malloc(sizeof(*dinfo), M_DEVBUF, M_WAITOK | M_ZERO);
if (ofw_bus_gen_setup_devinfo(&dinfo->mdi_obdinfo,
child) != 0) {
free(dinfo, M_DEVBUF);
continue;
}
resource_list_init(&dinfo->mdi_resources);
if (OF_searchprop(child, "#interrupt-cells", &icells,
sizeof(icells)) <= 0)
icells = 2;
if (OF_getprop(child, "interrupt-parent", &iparent,
sizeof(iparent)) <= 0)
iparent = -1;
nintr = OF_getprop_alloc(child, "interrupts", sizeof(*intr),
(void **)&intr);
if (nintr > 0) {
for (i = 0; i < nintr; i += icells) {
u_int irq = intr[i];
if (iparent != -1)
irq = ofw_bus_map_intr(dev, iparent,
icells, &intr[i]);
resource_list_add(&dinfo->mdi_resources,
SYS_RES_IRQ, i, irq, irq, i);
}
}
cdev = device_add_child(dev, NULL, -1);
if (cdev == NULL) {
device_printf(dev, "<%s>: device_add_child failed\n",
dinfo->mdi_obdinfo.obd_name);
ofw_bus_gen_destroy_devinfo(&dinfo->mdi_obdinfo);
free(dinfo, M_DEVBUF);
continue;
}
device_set_ivars(cdev, dinfo);
}
return (bus_generic_attach(dev));
}
static const struct ofw_bus_devinfo *
vdevice_get_devinfo(device_t dev, device_t child)
{
return (device_get_ivars(child));
}
static int
vdevice_print_child(device_t dev, device_t child)
{
struct vdevice_devinfo *dinfo;
struct resource_list *rl;
int retval = 0;
dinfo = device_get_ivars(child);
rl = &dinfo->mdi_resources;
retval += bus_print_child_header(dev, child);
retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%ld");
retval += bus_print_child_footer(dev, child);
return (retval);
}
static struct resource_list *
vdevice_get_resource_list (device_t dev, device_t child)
{
struct vdevice_devinfo *dinfo;
dinfo = device_get_ivars(child);
return (&dinfo->mdi_resources);
}
static bus_dma_tag_t
vdevice_get_dma_tag(device_t dev, device_t child)
{
struct vdevice_devinfo *dinfo;
while (child != NULL && device_get_parent(child) != dev)
child = device_get_parent(child);
dinfo = device_get_ivars(child);
if (dinfo->mdi_dma_tag == NULL) {
bus_dma_tag_create(bus_get_dma_tag(dev),
1, 0, BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR,
NULL, NULL, BUS_SPACE_MAXSIZE, BUS_SPACE_UNRESTRICTED,
BUS_SPACE_MAXSIZE, 0, NULL, NULL, &dinfo->mdi_dma_tag);
phyp_iommu_set_dma_tag(dev, child, dinfo->mdi_dma_tag);
}
return (dinfo->mdi_dma_tag);
}
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