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/*-
* SPDX-License-Identifier: BSD-2-Clause
*
* Copyright 2019 Cisco Systems, Inc.
* 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/types.h>
#include <sys/param.h>
#include <sys/bus.h>
#include <sys/conf.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <machine/bus.h>
#include <machine/resource.h>
#include <sys/rman.h>
#include <sys/taskqueue.h>
#include <sys/pciio.h>
#include <dev/pci/pcivar.h>
#include <dev/pci/pcireg.h>
#include <dev/pci/pci_private.h>
#include <dev/pci/pcib_private.h>
#include <dev/pci/pci_host_generic.h>
#include <dev/vmd/vmd.h>
#include "pcib_if.h"
#include "pci_if.h"
static int
vmd_bus_probe(device_t dev)
{
device_set_desc(dev, "VMD bus");
return (-1000);
}
/* PCI interface. */
static int
vmd_bus_attach(device_t dev)
{
struct vmd_softc *sc;
struct pci_devinfo *dinfo;
rman_res_t start, end;
int b, s, f;
int found;
sc = device_get_softc(device_get_parent(dev));
/*
* Start at max PCI vmd_domain and work down. Only VMD
* starting bus is connect to VMD device directly. Scan al
* lslots and function connected to starting bus.
*/
b = sc->vmd_bus_start;
found = 0;
for (s = 0; s < PCI_SLOTMAX; s++) {
for (f = 0; f < PCI_FUNCMAX; f++) {
dinfo = pci_read_device(device_get_parent(dev), dev,
PCI_DOMAINMAX - device_get_unit(
device_get_parent(dev)), b, s, f);
if (dinfo != NULL) {
found = 1;
pci_add_child(dev, dinfo);
start = rman_get_start(sc->vmd_regs_resource[1]);
end = rman_get_end(sc->vmd_regs_resource[1]);
resource_list_add_next(&dinfo->resources,
SYS_RES_MEMORY, start, end, end - start + 1);
start = rman_get_start(sc->vmd_io_resource);
end = rman_get_end(sc->vmd_io_resource);
resource_list_add_next(&dinfo->resources,
SYS_RES_IOPORT, start, end, end - start + 1);
}
}
}
if (found) {
bus_generic_attach(dev);
}
return (0);
}
static int
vmd_bus_detach(device_t dev)
{
struct vmd_softc *sc;
struct pci_devinfo *dinfo;
int b, s, f;
device_delete_children(dev);
sc = device_get_softc(device_get_parent(dev));
b = sc->vmd_bus_start;
for (s = 0; s < PCI_SLOTMAX; s++) {
for (f = 0; f < PCI_FUNCMAX; f++) {
dinfo = pci_read_device(device_get_parent(dev), dev,
PCI_DOMAINMAX - device_get_unit(
device_get_parent(dev)), b, s, f);
if (dinfo != NULL)
resource_list_free(&dinfo->resources);
}
}
return (0);
}
static int
vmd_bus_adjust_resource(device_t dev, device_t child, int type,
struct resource *r, rman_res_t start, rman_res_t end)
{
struct resource *res = r;
if (type == SYS_RES_MEMORY) {
/* VMD device controls this */
return (0);
}
return (bus_generic_adjust_resource(dev, child, type, res, start, end));
}
static int
vmd_bus_release_resource(device_t dev, device_t child, int type, int rid,
struct resource *r)
{
if (type == SYS_RES_MEMORY) {
/* VMD device controls this */
return (0);
}
return (pci_release_resource(dev, child, type, rid, r));
}
static struct resource *
vmd_bus_alloc_resource(device_t dev, device_t child, int type, int *rid,
rman_res_t start, rman_res_t end, rman_res_t count, u_int flags)
{
struct vmd_softc *sc;
sc = device_get_softc(device_get_parent(dev));
if (type == SYS_RES_MEMORY) {
/* remap to VMD resources */
if (*rid == PCIR_MEMBASE_1) {
return (sc->vmd_regs_resource[1]);
} else if (*rid == PCIR_PMBASEL_1) {
return (sc->vmd_regs_resource[2]);
} else {
return (sc->vmd_regs_resource[2]);
}
}
return (pci_alloc_resource(dev, child, type, rid, start, end,
count, flags));
}
static int
vmd_bus_shutdown(device_t dev)
{
return (0);
}
static device_method_t vmd_bus_pci_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, vmd_bus_probe),
DEVMETHOD(device_attach, vmd_bus_attach),
DEVMETHOD(device_detach, vmd_bus_detach),
DEVMETHOD(device_shutdown, vmd_bus_shutdown),
/* Bus interface */
DEVMETHOD(bus_alloc_resource, vmd_bus_alloc_resource),
DEVMETHOD(bus_adjust_resource, vmd_bus_adjust_resource),
DEVMETHOD(bus_release_resource, vmd_bus_release_resource),
/* pci interface */
DEVMETHOD(pci_read_config, pci_read_config_method),
DEVMETHOD(pci_write_config, pci_write_config_method),
DEVMETHOD(pci_alloc_devinfo, pci_alloc_devinfo_method),
DEVMETHOD_END
};
static devclass_t vmd_bus_devclass;
DEFINE_CLASS_1(vmd_bus, vmd_bus_pci_driver, vmd_bus_pci_methods,
sizeof(struct pci_softc), pci_driver);
DRIVER_MODULE(vmd_bus, vmd, vmd_bus_pci_driver, vmd_bus_devclass, NULL, NULL);
MODULE_VERSION(vmd_bus, 1);
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