freebsd-skq/sys/dev/dpaa/dpaa.c
jhibbits 8bf1194fe5 Add support for the Freescale dTSEC DPAA-based ethernet controller.
Freescale's QorIQ line includes a new ethernet controller, based on their
Datapath Acceleration Architecture (DPAA).  This uses a combination of a Frame
manager, Buffer manager, and Queue manager to improve performance across all
interfaces by being able to pass data directly between hardware acceleration
interfaces.

As part of this import, Freescale's Netcomm Software (ncsw) driver is imported.
This was an attempt by Freescale to create an OS-agnostic sub-driver for
managing the hardware, using shims to interface to the OS-specific APIs.  This
work was abandoned, and Freescale's primary work is in the Linux driver (dual
BSD/GPL license).  Hence, this was imported directly to sys/contrib, rather than
going through the vendor area.  Going forward, FreeBSD-specific changes may be
made to the ncsw code, diverging from the upstream in potentially incompatible
ways.  An alternative could be to import the Linux driver itself, using the
linuxKPI layer, as that would maintain parity with the vendor-maintained driver.
However, the Linux driver has not been evaluated for reliability yet, and may
have issues with the import, whereas the ncsw-based driver in this commit was
completed by Semihalf 4 years ago, and is very stable.

Other SoC modules based on DPAA, which could be added in the future:
* Security and Encryption engine (SEC4.x, SEC5.x)
* RAID engine

Additional work to be done:
* Implement polling mode
* Test vlan support
* Add support for the Pattern Matching Engine, which can do regular expression
  matching on packets.

This driver has been tested on the P5020 QorIQ SoC.  Others listed in the
dtsec(4) manual page are expected to work as the same DPAA engine is included in
all.

Obtained from:	Semihalf
Relnotes:	Yes
Sponsored by:	Alex Perez/Inertial Computing
2016-02-29 03:38:00 +00:00

185 lines
5.0 KiB
C

/*-
* Copyright (c) 2012 Semihalf.
* 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/ktr.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/bus.h>
#include <sys/rman.h>
#include <sys/malloc.h>
#include <dev/fdt/fdt_common.h>
#include <dev/ofw/ofw_bus.h>
#include <dev/ofw/ofw_bus_subr.h>
#include <dev/ofw/openfirm.h>
#include "opt_platform.h"
static MALLOC_DEFINE(M_DPAA, "dpaa", "dpaa devices information");
static int dpaa_probe(device_t dev);
static int dpaa_attach(device_t dev);
static const struct ofw_bus_devinfo *dpaa_get_devinfo(device_t bus,
device_t child);
struct dpaa_softc {
};
struct dpaa_devinfo {
struct ofw_bus_devinfo di_ofw;
};
static device_method_t dpaa_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, dpaa_probe),
DEVMETHOD(device_attach, dpaa_attach),
DEVMETHOD(device_detach, bus_generic_detach),
DEVMETHOD(device_shutdown, bus_generic_shutdown),
DEVMETHOD(device_suspend, bus_generic_suspend),
DEVMETHOD(device_resume, bus_generic_resume),
/* OFW bus interface */
DEVMETHOD(ofw_bus_get_devinfo, dpaa_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),
{0, 0}
};
static driver_t dpaa_driver = {
"dpaa",
dpaa_methods,
sizeof(struct dpaa_softc),
};
static devclass_t dpaa_devclass;
DRIVER_MODULE_ORDERED(dpaa, ofwbus, dpaa_driver, dpaa_devclass, 0, 0,
SI_ORDER_ANY);
static int
dpaa_probe(device_t dev)
{
if (!ofw_bus_is_compatible(dev, "fsl,dpaa"))
return (ENXIO);
device_set_desc(dev, "Freescale Data Path Acceleration Architecture");
return (BUS_PROBE_DEFAULT);
}
static int
dpaa_attach(device_t dev)
{
device_t dev_child;
phandle_t dt_node, dt_child, enet_node;
struct dpaa_devinfo *di;
pcell_t cell_index;
cell_index = 0;
/*
* Walk dpaa and add direct subordinates as our children.
*/
dt_node = ofw_bus_get_node(dev);
dt_child = OF_child(dt_node);
for (; dt_child != 0; dt_child = OF_peer(dt_child)) {
/* Check and process 'status' property. */
if (!(fdt_is_enabled(dt_child)))
continue;
di = (struct dpaa_devinfo *)malloc(sizeof(*di), M_DPAA,
M_WAITOK | M_ZERO);
if (ofw_bus_gen_setup_devinfo(&di->di_ofw, dt_child) != 0) {
free(di, M_DPAA);
device_printf(dev, "could not set up devinfo\n");
continue;
}
/*
* dTSEC number from SoC is equal to number get from
* dts file.
*/
if (OF_getprop(dt_child, "fsl,fman-mac",
(void *)&enet_node, sizeof(enet_node)) == -1) {
device_printf(dev, "Could not get fsl,fman-mac "
"from dts\n");
continue;
}
if ((enet_node = OF_instance_to_package(enet_node)) == -1) {
device_printf(dev, "Could not get enet node\n");
continue;
}
if (OF_getprop(enet_node, "cell-index",
(void *)&cell_index, sizeof(cell_index)) == -1) {
device_printf(dev, "Could not get cell-index from enet "
"node\n");
continue;
}
/* Add newbus device for this FDT node */
dev_child = device_add_child(dev, "dtsec", (int)cell_index);
if (dev_child == NULL) {
device_printf(dev, "could not add child: %s\n",
di->di_ofw.obd_name);
ofw_bus_gen_destroy_devinfo(&di->di_ofw);
free(di, M_DPAA);
continue;
}
#ifdef DEBUG
device_printf(dev, "added child: %s\n\n", di->di_ofw.obd_name);
#endif
device_set_ivars(dev_child, di);
}
return (bus_generic_attach(dev));
}
static const struct ofw_bus_devinfo *
dpaa_get_devinfo(device_t bus, device_t child)
{
struct dpaa_devinfo *di;
di = device_get_ivars(child);
return (&di->di_ofw);
}