freebsd-skq/sys/dev/dpaa/fman_fdt.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

105 lines
2.8 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/kernel.h>
#include <sys/bus.h>
#include <sys/module.h>
#include <dev/ofw/ofw_bus.h>
#include <dev/ofw/ofw_bus_subr.h>
#include <contrib/ncsw/inc/ncsw_ext.h>
#include <contrib/ncsw/inc/enet_ext.h>
#include "fman.h"
#define FFMAN_DEVSTR "Freescale Frame Manager"
static int fman_fdt_probe(device_t dev);
static device_method_t fman_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, fman_fdt_probe),
DEVMETHOD(device_attach, fman_attach),
DEVMETHOD(device_detach, fman_detach),
DEVMETHOD(device_shutdown, fman_shutdown),
DEVMETHOD(device_suspend, fman_suspend),
DEVMETHOD(device_resume, fman_resume),
{ 0, 0 }
};
static driver_t fman_driver = {
"fman",
fman_methods,
sizeof(struct fman_softc),
};
static devclass_t fman_devclass;
EARLY_DRIVER_MODULE(fman, simplebus, fman_driver, fman_devclass, 0, 0,
BUS_PASS_BUS + BUS_PASS_ORDER_MIDDLE);
static int
fman_fdt_probe(device_t dev)
{
if (!ofw_bus_is_compatible(dev, "fsl,fman"))
return (ENXIO);
device_set_desc(dev, FFMAN_DEVSTR);
return (BUS_PROBE_DEFAULT);
}
uint32_t
fman_get_clock(struct fman_softc *sc)
{
device_t dev;
phandle_t node;
pcell_t fman_clock;
dev = sc->dev;
node = ofw_bus_get_node(dev);
if ((OF_getprop(node, "clock-frequency", &fman_clock,
sizeof(fman_clock)) <= 0) || (fman_clock == 0)) {
device_printf(dev, "could not acquire correct frequency "
"from DTS\n");
return (0);
}
return ((uint32_t)fman_clock);
}