freebsd-dev/sys/dev/vnic/mrml_bridge.c

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/*
* Copyright (C) 2016 Cavium Inc.
* All rights reserved.
*
* Developed by Semihalf.
*
* 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 "opt_platform.h"
#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/resource.h>
#include <sys/rman.h>
#include <sys/socket.h>
#include <sys/queue.h>
#include <dev/ofw/ofw_bus.h>
#include <dev/ofw/ofw_bus_subr.h>
#include <dev/fdt/simplebus.h>
#include <machine/bus.h>
#include <machine/resource.h>
static MALLOC_DEFINE(M_MRMLB, "MRML bridge", "Cavium MRML bridge");
static device_probe_t mrmlb_fdt_probe;
static device_attach_t mrmlb_fdt_attach;
static struct resource * mrmlb_ofw_bus_alloc_res(device_t, device_t, int, int *,
rman_res_t, rman_res_t, rman_res_t, u_int);
static const struct ofw_bus_devinfo * mrmlb_ofw_get_devinfo(device_t, device_t);
static device_method_t mrmlbus_fdt_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, mrmlb_fdt_probe),
DEVMETHOD(device_attach, mrmlb_fdt_attach),
/* Bus interface */
DEVMETHOD(bus_alloc_resource, mrmlb_ofw_bus_alloc_res),
DEVMETHOD(bus_release_resource, bus_generic_release_resource),
DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
/* ofw_bus interface */
DEVMETHOD(ofw_bus_get_devinfo, mrmlb_ofw_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),
DEVMETHOD_END
};
DEFINE_CLASS_0(mrmlbus, mrmlbus_fdt_driver, mrmlbus_fdt_methods,
sizeof(struct simplebus_softc));
static devclass_t mrmlbus_fdt_devclass;
EARLY_DRIVER_MODULE(mrmlbus, pcib, mrmlbus_fdt_driver, mrmlbus_fdt_devclass, 0, 0,
BUS_PASS_BUS + BUS_PASS_ORDER_MIDDLE);
MODULE_VERSION(mrmlbus, 1);
static int mrmlb_ofw_fill_ranges(phandle_t, struct simplebus_softc *);
static int mrmlb_ofw_bus_attach(device_t);
static int
mrmlb_fdt_probe(device_t dev)
{
if (!ofw_bus_status_okay(dev))
return (ENXIO);
if (!ofw_bus_is_compatible(dev, "cavium,thunder-8890-mrml-bridge"))
return (ENXIO);
device_set_desc(dev, "Cavium ThunderX MRML bridge");
return (BUS_PROBE_SPECIFIC);
}
static int
mrmlb_fdt_attach(device_t dev)
{
int err;
err = mrmlb_ofw_bus_attach(dev);
if (err != 0)
return (err);
return (bus_generic_attach(dev));
}
/* OFW bus interface */
struct mrmlb_ofw_devinfo {
struct ofw_bus_devinfo di_dinfo;
struct resource_list di_rl;
};
static const struct ofw_bus_devinfo *
mrmlb_ofw_get_devinfo(device_t bus __unused, device_t child)
{
struct mrmlb_ofw_devinfo *di;
di = device_get_ivars(child);
return (&di->di_dinfo);
}
static struct resource *
mrmlb_ofw_bus_alloc_res(device_t bus, device_t child, int type, int *rid,
rman_res_t start, rman_res_t end, rman_res_t count, u_int flags)
{
struct simplebus_softc *sc;
struct mrmlb_ofw_devinfo *di;
struct resource_list_entry *rle;
int i;
if (RMAN_IS_DEFAULT_RANGE(start, end)) {
if ((di = device_get_ivars(child)) == NULL)
return (NULL);
if (type == SYS_RES_IOPORT)
type = SYS_RES_MEMORY;
/* Find defaults for this rid */
rle = resource_list_find(&di->di_rl, type, *rid);
if (rle == NULL)
return (NULL);
start = rle->start;
end = rle->end;
count = rle->count;
}
sc = device_get_softc(bus);
if (type == SYS_RES_MEMORY) {
/* Remap through ranges property */
for (i = 0; i < sc->nranges; i++) {
if (start >= sc->ranges[i].bus && end <
sc->ranges[i].bus + sc->ranges[i].size) {
start -= sc->ranges[i].bus;
start += sc->ranges[i].host;
end -= sc->ranges[i].bus;
end += sc->ranges[i].host;
break;
}
}
if (i == sc->nranges && sc->nranges != 0) {
device_printf(bus, "Could not map resource "
"%#lx-%#lx\n", start, end);
return (NULL);
}
}
return (bus_generic_alloc_resource(bus, child, type, rid, start, end,
count, flags));
}
/* Helper functions */
static int
mrmlb_ofw_fill_ranges(phandle_t node, struct simplebus_softc *sc)
{
int host_address_cells;
cell_t *base_ranges;
ssize_t nbase_ranges;
int err;
int i, j, k;
err = OF_searchencprop(OF_parent(node), "#address-cells",
&host_address_cells, sizeof(host_address_cells));
if (err <= 0)
return (-1);
nbase_ranges = OF_getproplen(node, "ranges");
if (nbase_ranges < 0)
return (-1);
sc->nranges = nbase_ranges / sizeof(cell_t) /
(sc->acells + host_address_cells + sc->scells);
if (sc->nranges == 0)
return (0);
sc->ranges = malloc(sc->nranges * sizeof(sc->ranges[0]),
M_MRMLB, M_WAITOK);
base_ranges = malloc(nbase_ranges, M_MRMLB, M_WAITOK);
OF_getencprop(node, "ranges", base_ranges, nbase_ranges);
for (i = 0, j = 0; i < sc->nranges; i++) {
sc->ranges[i].bus = 0;
for (k = 0; k < sc->acells; k++) {
sc->ranges[i].bus <<= 32;
sc->ranges[i].bus |= base_ranges[j++];
}
sc->ranges[i].host = 0;
for (k = 0; k < host_address_cells; k++) {
sc->ranges[i].host <<= 32;
sc->ranges[i].host |= base_ranges[j++];
}
sc->ranges[i].size = 0;
for (k = 0; k < sc->scells; k++) {
sc->ranges[i].size <<= 32;
sc->ranges[i].size |= base_ranges[j++];
}
}
free(base_ranges, M_MRMLB);
return (sc->nranges);
}
static int
mrmlb_ofw_bus_attach(device_t dev)
{
struct simplebus_softc *sc;
struct mrmlb_ofw_devinfo *di;
device_t child;
phandle_t parent, node;
parent = ofw_bus_get_node(dev);
simplebus_init(dev, parent);
sc = device_get_softc(dev);
if (mrmlb_ofw_fill_ranges(parent, sc) < 0) {
device_printf(dev, "could not get ranges\n");
return (ENXIO);
}
/* Iterate through all bus subordinates */
for (node = OF_child(parent); node > 0; node = OF_peer(node)) {
/* Allocate and populate devinfo. */
di = malloc(sizeof(*di), M_MRMLB, M_WAITOK | M_ZERO);
if (ofw_bus_gen_setup_devinfo(&di->di_dinfo, node) != 0) {
free(di, M_MRMLB);
continue;
}
/* Initialize and populate resource list. */
resource_list_init(&di->di_rl);
ofw_bus_reg_to_rl(dev, node, sc->acells, sc->scells,
&di->di_rl);
ofw_bus_intr_to_rl(dev, node, &di->di_rl, NULL);
/* Add newbus device for this FDT node */
child = device_add_child(dev, NULL, -1);
if (child == NULL) {
resource_list_free(&di->di_rl);
ofw_bus_gen_destroy_devinfo(&di->di_dinfo);
free(di, M_MRMLB);
continue;
}
device_set_ivars(child, di);
}
return (0);
}