svn commit: r274714 - head/sys/dev/beri/virtio
Ruslan Bukin
br at FreeBSD.org
Wed Nov 19 14:49:30 UTC 2014
Author: br
Date: Wed Nov 19 14:49:29 2014
New Revision: 274714
URL: https://svnweb.freebsd.org/changeset/base/274714
Log:
Add BERI-specific virtio mmio "platform" device.
This device provides a connector to Altera PIO allowing us
to interrupt software-implemented virtio mmio backend.
Sponsored by: DARPA, AFRL
Added:
head/sys/dev/beri/virtio/
head/sys/dev/beri/virtio/virtio_mmio_platform.c (contents, props changed)
head/sys/dev/beri/virtio/virtio_mmio_platform.h (contents, props changed)
Added: head/sys/dev/beri/virtio/virtio_mmio_platform.c
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ head/sys/dev/beri/virtio/virtio_mmio_platform.c Wed Nov 19 14:49:29 2014 (r274714)
@@ -0,0 +1,227 @@
+/*-
+ * Copyright (c) 2014 Ruslan Bukin <br at bsdpad.com>
+ * All rights reserved.
+ *
+ * This software was developed by SRI International and the University of
+ * Cambridge Computer Laboratory under DARPA/AFRL contract (FA8750-10-C-0237)
+ * ("CTSRD"), as part of the DARPA CRASH research programme.
+ *
+ * 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.
+ */
+
+/*
+ * BERI interface for Virtio MMIO bus.
+ *
+ * This driver provides interrupt-engine for software-implemented
+ * Virtio MMIO backend.
+ */
+
+#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/malloc.h>
+#include <sys/rman.h>
+#include <sys/timeet.h>
+#include <sys/timetc.h>
+#include <sys/watchdog.h>
+
+#include <machine/bus.h>
+#include <machine/fdt.h>
+#include <machine/cpu.h>
+#include <machine/cache.h>
+
+#include <dev/fdt/fdt_common.h>
+#include <dev/ofw/openfirm.h>
+#include <dev/ofw/ofw_bus.h>
+#include <dev/ofw/ofw_bus_subr.h>
+
+#include <dev/beri/virtio/virtio_mmio_platform.h>
+#include <dev/virtio/mmio/virtio_mmio.h>
+#include <dev/altera/pio/pio.h>
+
+#include "virtio_mmio_if.h"
+#include "pio_if.h"
+
+static void platform_intr(void *arg);
+
+struct virtio_mmio_platform_softc {
+ struct resource *res[1];
+ bus_space_tag_t bst;
+ bus_space_handle_t bsh;
+ device_t dev;
+ void (*intr_handler)(void *);
+ void *ih_user;
+ device_t pio_recv;
+ device_t pio_send;
+};
+
+static int
+setup_pio(struct virtio_mmio_platform_softc *sc, char *name, device_t *dev)
+{
+ phandle_t pio_node;
+ struct fdt_ic *ic;
+ phandle_t xref;
+ phandle_t node;
+
+ if ((node = ofw_bus_get_node(sc->dev)) == -1)
+ return (ENXIO);
+
+ if (OF_searchencprop(node, name, &xref,
+ sizeof(xref)) == -1) {
+ return (ENXIO);
+ }
+
+ pio_node = OF_node_from_xref(xref);
+ SLIST_FOREACH(ic, &fdt_ic_list_head, fdt_ics) {
+ if (ic->iph == pio_node) {
+ *dev = ic->dev;
+ PIO_CONFIGURE(*dev, PIO_OUT_ALL,
+ PIO_UNMASK_ALL);
+ return (0);
+ }
+ }
+
+ return (ENXIO);
+}
+
+static int
+virtio_mmio_platform_probe(device_t dev)
+{
+
+ if (!ofw_bus_status_okay(dev))
+ return (ENXIO);
+
+ if (!ofw_bus_is_compatible(dev, "beri,virtio_mmio_platform"))
+ return (ENXIO);
+
+ device_set_desc(dev, "Virtio MMIO platform");
+ return (BUS_PROBE_DEFAULT);
+}
+
+static int
+virtio_mmio_platform_attach(device_t dev)
+{
+ struct virtio_mmio_platform_softc *sc;
+ struct fdt_ic *fic;
+ phandle_t node;
+
+ sc = device_get_softc(dev);
+ sc->dev = dev;
+
+ if (setup_pio(sc, "pio-send", &sc->pio_send) != 0)
+ return (ENXIO);
+ if (setup_pio(sc, "pio-recv", &sc->pio_recv) != 0)
+ return (ENXIO);
+
+ if ((node = ofw_bus_get_node(sc->dev)) == -1)
+ return (ENXIO);
+
+ fic = malloc(sizeof(*fic), M_DEVBUF, M_WAITOK|M_ZERO);
+ fic->iph = node;
+ fic->dev = dev;
+ SLIST_INSERT_HEAD(&fdt_ic_list_head, fic, fdt_ics);
+
+ return (0);
+}
+
+static int
+platform_note(device_t dev, size_t offset)
+{
+ struct virtio_mmio_platform_softc *sc;
+
+ sc = device_get_softc(dev);
+
+ if (offset == VIRTIO_MMIO_QUEUE_NOTIFY) {
+ mips_dcache_wbinv_all();
+ PIO_SET(sc->pio_send, Q_NOTIFY, 1);
+ }
+
+ if (offset == VIRTIO_MMIO_QUEUE_PFN) {
+ mips_dcache_wbinv_all();
+ PIO_SET(sc->pio_send, Q_PFN, 1);
+ }
+
+ return (0);
+}
+
+static void
+platform_intr(void *arg)
+{
+ struct virtio_mmio_platform_softc *sc;
+ int reg;
+
+ sc = arg;
+
+ /* Read pending */
+ reg = PIO_READ(sc->pio_recv);
+
+ /* Ack */
+ PIO_SET(sc->pio_recv, reg, 0);
+
+ /* Writeback, invalidate cache */
+ mips_dcache_wbinv_all();
+
+ if (sc->intr_handler != NULL)
+ sc->intr_handler(sc->ih_user);
+}
+
+static int
+platform_setup_intr(device_t dev, device_t mmio_dev,
+ void *intr_handler, void *ih_user)
+{
+ struct virtio_mmio_platform_softc *sc;
+
+ sc = device_get_softc(dev);
+
+ sc->intr_handler = intr_handler;
+ sc->ih_user = ih_user;
+
+ PIO_SETUP_IRQ(sc->pio_recv, platform_intr, sc);
+
+ return (0);
+}
+
+static device_method_t virtio_mmio_platform_methods[] = {
+ DEVMETHOD(device_probe, virtio_mmio_platform_probe),
+ DEVMETHOD(device_attach, virtio_mmio_platform_attach),
+
+ /* virtio_mmio_if.h */
+ DEVMETHOD(virtio_mmio_note, platform_note),
+ DEVMETHOD(virtio_mmio_setup_intr, platform_setup_intr),
+ DEVMETHOD_END
+};
+
+static driver_t virtio_mmio_platform_driver = {
+ "virtio_mmio_platform",
+ virtio_mmio_platform_methods,
+ sizeof(struct virtio_mmio_platform_softc),
+};
+
+static devclass_t virtio_mmio_platform_devclass;
+
+DRIVER_MODULE(virtio_mmio_platform, simplebus, virtio_mmio_platform_driver,
+ virtio_mmio_platform_devclass, 0, 0);
Added: head/sys/dev/beri/virtio/virtio_mmio_platform.h
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ head/sys/dev/beri/virtio/virtio_mmio_platform.h Wed Nov 19 14:49:29 2014 (r274714)
@@ -0,0 +1,35 @@
+/*-
+ * Copyright (c) 2014 Ruslan Bukin <br at bsdpad.com>
+ * All rights reserved.
+ *
+ * This software was developed by SRI International and the University of
+ * Cambridge Computer Laboratory under DARPA/AFRL contract (FA8750-10-C-0237)
+ * ("CTSRD"), as part of the DARPA CRASH research programme.
+ *
+ * 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.
+ *
+ * $FreeBSD$
+ */
+
+#define Q_NOTIFY 0x1
+#define Q_PFN 0x2
+#define Q_INTR 0x4
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