Created
July 29, 2012 18:20
-
-
Save enukane/3200815 to your computer and use it in GitHub Desktop.
WIP: guest-side virtio-9p device driver mock
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Index: sys/dev/virtio/9p/virtio_9p.c | |
=================================================================== | |
--- sys/dev/virtio/9p/virtio_9p.c (revision 0) | |
+++ sys/dev/virtio/9p/virtio_9p.c (working copy) | |
@@ -0,0 +1,181 @@ | |
+/*- | |
+ * Copyright (c) 2011, Bryan Venteicher <[email protected]> | |
+ * 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 unmodified, 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 ``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 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. | |
+ */ | |
+ | |
+/* Driver for VirtFS devices. */ | |
+ | |
+#include <sys/cdefs.h> | |
+__FBSDID("$FreeBSD$"); | |
+ | |
+#include <sys/param.h> | |
+#include <sys/systm.h> | |
+#include <sys/kernel.h> | |
+#include <sys/endian.h> | |
+#include <sys/kthread.h> | |
+#include <sys/malloc.h> | |
+#include <sys/module.h> | |
+#include <sys/sglist.h> | |
+#include <sys/sysctl.h> | |
+#include <sys/lock.h> | |
+#include <sys/mutex.h> | |
+#include <sys/queue.h> | |
+ | |
+#include <machine/bus.h> | |
+#include <machine/resource.h> | |
+#include <sys/bus.h> | |
+#include <sys/rman.h> | |
+ | |
+#include <dev/virtio/virtio.h> | |
+#include <dev/virtio/virtqueue.h> | |
+#include <dev/virtio/9p/virtio_9p.h> | |
+ | |
+#include "virtio_if.h" | |
+ | |
+struct vt9p_softc { | |
+ device_t vt9p_dev; | |
+ struct mtx vt9p_mtx; | |
+}; | |
+ | |
+static int vt9p_modevent(module_t, int, void *); | |
+ | |
+static int vt9p_probe(device_t); | |
+static int vt9p_attach(device_t); | |
+static int vt9p_detach(device_t); | |
+static int vt9p_config_change(device_t); | |
+ | |
+static device_method_t vt9p_methods[] = { | |
+ /* Device methods. */ | |
+ DEVMETHOD(device_probe, vt9p_probe), | |
+ DEVMETHOD(device_attach, vt9p_attach), | |
+ DEVMETHOD(device_detach, vt9p_detach), | |
+ | |
+ /* VirtIO methods. */ | |
+ DEVMETHOD(virtio_config_change, vt9p_config_change), | |
+ | |
+ { 0, 0 } | |
+}; | |
+ | |
+static driver_t vt9p_driver = { | |
+ "vt9p", | |
+ vt9p_methods, | |
+ sizeof(struct vt9p_softc) | |
+}; | |
+static devclass_t vt9p_devclass; | |
+ | |
+DRIVER_MODULE(virtio_9p, virtio_pci, vt9p_driver, | |
+ vt9p_devclass, vt9p_modevent, 0); | |
+MODULE_VERSION(virtio_9p, 1); | |
+MODULE_DEPEND(virito_9p, virtio, 1, 1, 1); | |
+ | |
+static int | |
+vt9p_modevent(module_t mod, int type, void *unused) | |
+{ | |
+ int error = 0; | |
+ | |
+ printf("%u %s : type = %d\n", __LINE__, __func__, type); | |
+ | |
+ switch (type) { | |
+ case MOD_LOAD: | |
+ break; | |
+ case MOD_QUIESCE: | |
+ case MOD_UNLOAD: | |
+ break; | |
+ case MOD_SHUTDOWN: | |
+ break; | |
+ default: | |
+ error = EOPNOTSUPP; | |
+ break; | |
+ } | |
+ | |
+ return (error); | |
+ | |
+} | |
+ | |
+static int | |
+vt9p_probe(device_t dev) | |
+{ | |
+ printf("%u %s : probing (%x <> VIRTIO_ID_9P %x)\n", __LINE__, __func__, virtio_get_device_type(dev), VIRTIO_ID_9P); | |
+ if (virtio_get_device_type(dev) != VIRTIO_ID_9P) { | |
+ return (ENXIO); | |
+ } | |
+ | |
+ device_set_desc(dev, "VirtFS"); | |
+ | |
+ return (BUS_PROBE_DEFAULT); | |
+} | |
+ | |
+static int | |
+vt9p_attach(device_t dev) | |
+{ | |
+ struct vt9p_softc *sc; | |
+ int error = 0; | |
+ | |
+ printf("%u %s attach\n", __LINE__, __func__); | |
+ | |
+ sc = device_get_softc(dev); | |
+ sc->vt9p_dev = dev; | |
+ | |
+ /* set feature desc */ | |
+ | |
+ /* negotiate feature */ | |
+ | |
+ /* get page */ | |
+ | |
+ /* alloc virtqueue */ | |
+ | |
+ /* setup intr */ | |
+ | |
+ /* enable queue intr */ | |
+ | |
+//fail: | |
+ if (error) | |
+ vt9p_detach(dev); | |
+ | |
+ return error; | |
+} | |
+ | |
+static int | |
+vt9p_detach(device_t dev) | |
+{ | |
+ struct vt9p_softc *sc; | |
+ | |
+ sc = device_get_softc(dev); | |
+ | |
+ /* free got pages */ | |
+ | |
+ return 0; | |
+} | |
+ | |
+static int | |
+vt9p_config_change(device_t dev) | |
+{ | |
+ struct vt9p_softc *sc; | |
+ | |
+ sc = device_get_softc(dev); | |
+ | |
+ /* do something ? */ | |
+ | |
+ return 1; | |
+} | |
Index: sys/dev/virtio/9p/virtio_9p.h | |
=================================================================== |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment