218 lines
6.5 KiB
C
218 lines
6.5 KiB
C
/*-
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* Copyright (c) 2011 Nathan Whitehorn
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/module.h>
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#include <sys/malloc.h>
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#include <sys/bus.h>
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#include <sys/cpu.h>
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#include <machine/bus.h>
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#include <machine/intr_machdep.h>
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#include <dev/ofw/openfirm.h>
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#include <dev/ofw/ofw_bus.h>
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#include <dev/ofw/ofw_bus_subr.h>
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#include <powerpc/pseries/plpar_iommu.h>
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#include "iommu_if.h"
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static int vdevice_probe(device_t);
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static int vdevice_attach(device_t);
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static const struct ofw_bus_devinfo *vdevice_get_devinfo(device_t dev,
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device_t child);
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static int vdevice_print_child(device_t dev, device_t child);
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static struct resource_list *vdevice_get_resource_list(device_t, device_t);
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static bus_dma_tag_t vdevice_get_dma_tag(device_t dev, device_t child);
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/*
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* VDevice devinfo
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*/
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struct vdevice_devinfo {
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struct ofw_bus_devinfo mdi_obdinfo;
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struct resource_list mdi_resources;
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bus_dma_tag_t mdi_dma_tag;
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};
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static device_method_t vdevice_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, vdevice_probe),
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DEVMETHOD(device_attach, vdevice_attach),
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/* Bus interface */
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DEVMETHOD(bus_add_child, bus_generic_add_child),
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DEVMETHOD(bus_child_pnpinfo_str, ofw_bus_gen_child_pnpinfo_str),
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DEVMETHOD(bus_print_child, vdevice_print_child),
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DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
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DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
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DEVMETHOD(bus_alloc_resource, bus_generic_rl_alloc_resource),
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DEVMETHOD(bus_release_resource, bus_generic_rl_release_resource),
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DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
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DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
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DEVMETHOD(bus_get_resource_list, vdevice_get_resource_list),
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/* ofw_bus interface */
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DEVMETHOD(ofw_bus_get_devinfo, vdevice_get_devinfo),
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DEVMETHOD(ofw_bus_get_compat, ofw_bus_gen_get_compat),
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DEVMETHOD(ofw_bus_get_model, ofw_bus_gen_get_model),
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DEVMETHOD(ofw_bus_get_name, ofw_bus_gen_get_name),
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DEVMETHOD(ofw_bus_get_node, ofw_bus_gen_get_node),
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DEVMETHOD(ofw_bus_get_type, ofw_bus_gen_get_type),
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/* IOMMU interface */
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DEVMETHOD(bus_get_dma_tag, vdevice_get_dma_tag),
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DEVMETHOD(iommu_map, phyp_iommu_map),
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DEVMETHOD(iommu_unmap, phyp_iommu_unmap),
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DEVMETHOD_END
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};
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static driver_t vdevice_driver = {
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"vdevice",
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vdevice_methods,
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0
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};
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static devclass_t vdevice_devclass;
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DRIVER_MODULE(vdevice, ofwbus, vdevice_driver, vdevice_devclass, 0, 0);
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static int
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vdevice_probe(device_t dev)
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{
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const char *name;
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name = ofw_bus_get_name(dev);
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if (name == NULL || strcmp(name, "vdevice") != 0)
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return (ENXIO);
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if (!ofw_bus_is_compatible(dev, "IBM,vdevice"))
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return (ENXIO);
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device_set_desc(dev, "POWER Hypervisor Virtual Device Root");
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return (0);
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}
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static int
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vdevice_attach(device_t dev)
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{
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phandle_t root, child;
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device_t cdev;
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struct vdevice_devinfo *dinfo;
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root = ofw_bus_get_node(dev);
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/* The XICP (root PIC) will handle all our interrupts */
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powerpc_register_pic(root_pic, OF_xref_from_node(root),
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1 << 24 /* 24-bit XIRR field */, 1 /* Number of IPIs */, FALSE);
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for (child = OF_child(root); child != 0; child = OF_peer(child)) {
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dinfo = malloc(sizeof(*dinfo), M_DEVBUF, M_WAITOK | M_ZERO);
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if (ofw_bus_gen_setup_devinfo(&dinfo->mdi_obdinfo,
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child) != 0) {
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free(dinfo, M_DEVBUF);
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continue;
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}
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resource_list_init(&dinfo->mdi_resources);
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ofw_bus_intr_to_rl(dev, child, &dinfo->mdi_resources, NULL);
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cdev = device_add_child(dev, NULL, -1);
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if (cdev == NULL) {
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device_printf(dev, "<%s>: device_add_child failed\n",
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dinfo->mdi_obdinfo.obd_name);
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ofw_bus_gen_destroy_devinfo(&dinfo->mdi_obdinfo);
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free(dinfo, M_DEVBUF);
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continue;
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}
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device_set_ivars(cdev, dinfo);
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}
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return (bus_generic_attach(dev));
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}
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static const struct ofw_bus_devinfo *
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vdevice_get_devinfo(device_t dev, device_t child)
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{
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return (device_get_ivars(child));
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}
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static int
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vdevice_print_child(device_t dev, device_t child)
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{
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struct vdevice_devinfo *dinfo;
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struct resource_list *rl;
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int retval = 0;
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dinfo = device_get_ivars(child);
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rl = &dinfo->mdi_resources;
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retval += bus_print_child_header(dev, child);
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retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%ld");
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retval += bus_print_child_footer(dev, child);
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return (retval);
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}
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static struct resource_list *
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vdevice_get_resource_list (device_t dev, device_t child)
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{
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struct vdevice_devinfo *dinfo;
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dinfo = device_get_ivars(child);
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return (&dinfo->mdi_resources);
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}
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static bus_dma_tag_t
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vdevice_get_dma_tag(device_t dev, device_t child)
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{
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struct vdevice_devinfo *dinfo;
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while (child != NULL && device_get_parent(child) != dev)
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child = device_get_parent(child);
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dinfo = device_get_ivars(child);
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if (dinfo->mdi_dma_tag == NULL) {
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bus_dma_tag_create(bus_get_dma_tag(dev),
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1, 0, BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR,
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NULL, NULL, BUS_SPACE_MAXSIZE, BUS_SPACE_UNRESTRICTED,
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BUS_SPACE_MAXSIZE, 0, NULL, NULL, &dinfo->mdi_dma_tag);
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phyp_iommu_set_dma_tag(dev, child, dinfo->mdi_dma_tag);
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}
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return (dinfo->mdi_dma_tag);
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}
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