From patchwork Wed Dec 19 09:53:28 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: fred.konrad@greensocs.com X-Patchwork-Id: 207284 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (Client did not present a certificate) by ozlabs.org (Postfix) with ESMTPS id 503752C009B for ; Wed, 19 Dec 2012 20:54:25 +1100 (EST) Received: from localhost ([::1]:54370 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TlGM3-00055q-FC for incoming@patchwork.ozlabs.org; Wed, 19 Dec 2012 04:54:23 -0500 Received: from eggs.gnu.org ([208.118.235.92]:36437) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TlGLa-0004nf-IP for qemu-devel@nongnu.org; Wed, 19 Dec 2012 04:53:58 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1TlGLW-0001jK-2f for qemu-devel@nongnu.org; Wed, 19 Dec 2012 04:53:54 -0500 Received: from greensocs.com ([87.106.252.221]:54770 helo=s15328186.onlinehome-server.info) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TlGLV-0001j5-OW for qemu-devel@nongnu.org; Wed, 19 Dec 2012 04:53:49 -0500 Received: from localhost (unknown [127.0.0.1]) by s15328186.onlinehome-server.info (Postfix) with ESMTP id 29796439E32; Wed, 19 Dec 2012 09:53:49 +0000 (UTC) Received: from s15328186.onlinehome-server.info ([127.0.0.1]) by localhost (s15328186.onlinehome-server.info [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id F9AjotNSvqFP; Wed, 19 Dec 2012 10:53:49 +0100 (CET) Received: by s15328186.onlinehome-server.info (Postfix, from userid 491) id E35AB439E35; Wed, 19 Dec 2012 10:53:48 +0100 (CET) Received: from compaq.katmai.xl.cx.katmai.xl.cx (lan31-11-83-155-143-136.fbx.proxad.net [83.155.143.136]) by s15328186.onlinehome-server.info (Postfix) with ESMTPSA id 9CDC7439E32; Wed, 19 Dec 2012 10:53:47 +0100 (CET) From: fred.konrad@greensocs.com To: qemu-devel@nongnu.org Date: Wed, 19 Dec 2012 10:53:28 +0100 Message-Id: <1355910821-21302-3-git-send-email-fred.konrad@greensocs.com> X-Mailer: git-send-email 1.7.11.7 In-Reply-To: <1355910821-21302-1-git-send-email-fred.konrad@greensocs.com> References: <1355910821-21302-1-git-send-email-fred.konrad@greensocs.com> X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6.x X-Received-From: 87.106.252.221 Cc: peter.maydell@linaro.org, aliguori@us.ibm.com, e.voevodin@samsung.com, mark.burton@greensocs.com, agraf@suse.de, stefanha@redhat.com, cornelia.huck@de.ibm.com, afaerber@suse.de, fred.konrad@greensocs.com Subject: [Qemu-devel] [RFC PATCH V8 02/15] virtio-bus : Introduce virtio-bus X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org From: KONRAD Frederic Introduce virtio-bus. Refactored transport device will create a bus which extends virtio-bus. Signed-off-by: KONRAD Frederic --- hw/Makefile.objs | 1 + hw/virtio-bus.c | 169 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ hw/virtio-bus.h | 98 ++++++++++++++++++++++++++++++++ 3 files changed, 268 insertions(+) create mode 100644 hw/virtio-bus.c create mode 100644 hw/virtio-bus.h diff --git a/hw/Makefile.objs b/hw/Makefile.objs index d581d8d..6fa4de4 100644 --- a/hw/Makefile.objs +++ b/hw/Makefile.objs @@ -3,6 +3,7 @@ common-obj-y += loader.o common-obj-$(CONFIG_VIRTIO) += virtio-console.o common-obj-$(CONFIG_VIRTIO) += virtio-rng.o common-obj-$(CONFIG_VIRTIO_PCI) += virtio-pci.o +common-obj-$(CONFIG_VIRTIO) += virtio-bus.o common-obj-y += fw_cfg.o common-obj-$(CONFIG_PCI) += pci.o pci_bridge.o pci_bridge_dev.o common-obj-$(CONFIG_PCI) += msix.o msi.o diff --git a/hw/virtio-bus.c b/hw/virtio-bus.c new file mode 100644 index 0000000..7a3d06e --- /dev/null +++ b/hw/virtio-bus.c @@ -0,0 +1,169 @@ +/* + * VirtioBus + * + * Copyright (C) 2012 : GreenSocs Ltd + * http://www.greensocs.com/ , email: info@greensocs.com + * + * Developed by : + * Frederic Konrad + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, see . + * + */ + +#include "hw.h" +#include "qemu-error.h" +#include "qdev.h" +#include "virtio-bus.h" +#include "virtio.h" + +/* #define DEBUG_VIRTIO_BUS */ + +#ifdef DEBUG_VIRTIO_BUS +#define DPRINTF(fmt, ...) \ +do { printf("virtio_bus: " fmt , ## __VA_ARGS__); } while (0) +#else +#define DPRINTF(fmt, ...) do { } while (0) +#endif + +/* Plug the VirtIODevice */ +int virtio_bus_plug_device(VirtIODevice *vdev) +{ + DeviceState *qdev = DEVICE(vdev); + BusState *qbus = BUS(qdev_get_parent_bus(qdev)); + VirtioBusState *bus = VIRTIO_BUS(qbus); + VirtioBusClass *klass = VIRTIO_BUS_GET_CLASS(bus); + DPRINTF("%s : plug device.\n", qbus->name); + + bus->vdev = vdev; + + if (klass->device_plugged != NULL) { + klass->device_plugged(qbus->parent); + } + + /* + * The lines below will disappear when we drop VirtIOBindings, at the end + * of the serie. + */ + bus->bindings.notify = klass->notify; + bus->bindings.save_config = klass->save_config; + bus->bindings.save_queue = klass->save_queue; + bus->bindings.load_config = klass->load_config; + bus->bindings.load_queue = klass->load_queue; + bus->bindings.load_done = klass->load_done; + bus->bindings.get_features = klass->get_features; + bus->bindings.query_guest_notifiers = klass->query_guest_notifiers; + bus->bindings.set_guest_notifiers = klass->set_guest_notifiers; + bus->bindings.set_host_notifier = klass->set_host_notifier; + bus->bindings.vmstate_change = klass->vmstate_change; + virtio_bind_device(bus->vdev, &(bus->bindings), qbus->parent); + /* + */ + + return 0; +} + +/* Reset the virtio_bus */ +void virtio_bus_reset(VirtioBusState *bus) +{ + DPRINTF("%s : reset device.\n", qbus->name); + if (bus->vdev != NULL) { + virtio_reset(bus->vdev); + } +} + +/* Destroy the VirtIODevice */ +void virtio_bus_destroy_device(VirtioBusState *bus) +{ + DeviceState *qdev; + BusState *qbus = BUS(bus); + VirtioBusClass *klass = VIRTIO_BUS_GET_CLASS(bus); + DPRINTF("%s : remove device.\n", qbus->name); + + if (bus->vdev != NULL) { + if (klass->device_unplug != NULL) { + klass->device_unplug(qbus->parent); + } + qdev = DEVICE(bus->vdev); + qdev_free(qdev); + bus->vdev = NULL; + } +} + +/* Get the device id of the plugged device. */ +uint16_t get_virtio_device_id(VirtioBusState *bus) +{ + assert(bus->vdev != NULL); + return bus->vdev->device_id; +} + +/* Get the nvectors field of the plugged device. */ +int get_virtio_device_nvectors(VirtioBusState *bus) +{ + assert(bus->vdev != NULL); + return bus->vdev->nvectors; +} + +/* Set the nvectors field of the plugged device. */ +void set_virtio_device_nvectors(VirtioBusState *bus, int nvectors) +{ + assert(bus->vdev != NULL); + bus->vdev->nvectors = nvectors; +} + +/* Get the config_len field of the plugged device. */ +size_t get_virtio_device_config_len(VirtioBusState *bus) +{ + assert(bus->vdev != NULL); + return bus->vdev->config_len; +} + +/* Get the features of the plugged device. */ +uint32_t get_virtio_device_features(VirtioBusState *bus, + uint32_t requested_features) +{ + VirtioDeviceClass *k; + assert(bus->vdev != NULL); + k = VIRTIO_DEVICE_GET_CLASS(bus->vdev); + assert(k->get_features != NULL); + return k->get_features(bus->vdev, requested_features); +} + +/* Get the bad features of the plugged device. */ +uint32_t get_virtio_device_bad_features(VirtioBusState *bus) +{ + VirtioDeviceClass *k; + assert(bus->vdev != NULL); + k = VIRTIO_DEVICE_GET_CLASS(bus->vdev); + if (k->bad_features != NULL) { + return k->bad_features(bus->vdev); + } else { + return 0; + } +} + +static const TypeInfo virtio_bus_info = { + .name = TYPE_VIRTIO_BUS, + .parent = TYPE_BUS, + .instance_size = sizeof(VirtioBusState), + .abstract = true, + .class_size = sizeof(VirtioBusClass), +}; + +static void virtio_register_types(void) +{ + type_register_static(&virtio_bus_info); +} + +type_init(virtio_register_types) diff --git a/hw/virtio-bus.h b/hw/virtio-bus.h new file mode 100644 index 0000000..a2e2012 --- /dev/null +++ b/hw/virtio-bus.h @@ -0,0 +1,98 @@ +/* + * VirtioBus + * + * Copyright (C) 2012 : GreenSocs Ltd + * http://www.greensocs.com/ , email: info@greensocs.com + * + * Developed by : + * Frederic Konrad + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, see . + * + */ + +#ifndef VIRTIO_BUS_H +#define VIRTIO_BUS_H + +#include "qdev.h" +#include "sysemu.h" +#include "virtio.h" + +#define TYPE_VIRTIO_BUS "virtio-bus" +#define VIRTIO_BUS_GET_CLASS(obj) \ + OBJECT_GET_CLASS(VirtioBusClass, obj, TYPE_VIRTIO_BUS) +#define VIRTIO_BUS_CLASS(klass) \ + OBJECT_CLASS_CHECK(VirtioBusClass, klass, TYPE_VIRTIO_BUS) +#define VIRTIO_BUS(obj) OBJECT_CHECK(VirtioBusState, (obj), TYPE_VIRTIO_BUS) + +typedef struct VirtioBusState VirtioBusState; + +typedef struct VirtioBusClass { + /* This is what a VirtioBus must implement */ + BusClass parent; + void (*notify)(void *opaque, uint16_t vector); + void (*save_config)(void *opaque, QEMUFile *f); + void (*save_queue)(void *opaque, int n, QEMUFile *f); + int (*load_config)(void *opaque, QEMUFile *f); + int (*load_queue)(void *opaque, int n, QEMUFile *f); + int (*load_done)(void *opaque, QEMUFile *f); + unsigned (*get_features)(void *opaque); + bool (*query_guest_notifiers)(void *opaque); + int (*set_guest_notifiers)(void *opaque, bool assigned); + int (*set_host_notifier)(void *opaque, int n, bool assigned); + void (*vmstate_change)(void *opaque, bool running); + /* + * transport independent init function. + * This is called by virtio-bus just after the device is plugged. + */ + void (*device_plugged)(void *opaque); + /* + * transport independent exit function. + * This is called by virtio-bus just before the device is unplugged. + */ + void (*device_unplug)(void *opaque); +} VirtioBusClass; + +struct VirtioBusState { + BusState parent_obj; + /* + * Only one VirtIODevice can be plugged on the bus. + */ + VirtIODevice *vdev; + /* + * This will be removed at the end of the serie. + */ + VirtIOBindings bindings; + /* + */ +}; + +int virtio_bus_plug_device(VirtIODevice *vdev); +void virtio_bus_reset(VirtioBusState *bus); +void virtio_bus_destroy_device(VirtioBusState *bus); +/* Get the device id of the plugged device. */ +uint16_t get_virtio_device_id(VirtioBusState *bus); +/* Get the nvectors field of the plugged device. */ +int get_virtio_device_nvectors(VirtioBusState *bus); +/* Set the nvectors field of the plugged device. */ +void set_virtio_device_nvectors(VirtioBusState *bus, int nvectors); +/* Get the config_len field of the plugged device. */ +size_t get_virtio_device_config_len(VirtioBusState *bus); +/* Get the features of the plugged device. */ +uint32_t get_virtio_device_features(VirtioBusState *bus, + uint32_t requested_features); +/* Get the bad features of the plugged device. */ +uint32_t get_virtio_device_bad_features(VirtioBusState *bus); + +#endif /* VIRTIO_BUS_H */