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Tsirkin" , Stefan Hajnoczi , Eric Blake Subject: [PATCH v2 12/13] hw/virtio: derive vhost-user-i2c from vhost-user-base Date: Tue, 18 Apr 2023 17:21:39 +0100 Message-Id: <20230418162140.373219-13-alex.bennee@linaro.org> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230418162140.373219-1-alex.bennee@linaro.org> References: <20230418162140.373219-1-alex.bennee@linaro.org> MIME-Version: 1.0 Received-SPF: pass client-ip=2a00:1450:4864:20::330; envelope-from=alex.bennee@linaro.org; helo=mail-wm1-x330.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+patch=linaro.org@nongnu.org Sender: qemu-devel-bounces+patch=linaro.org@nongnu.org Now we can take advantage of the new base class and make vhost-user-i2c a much simpler boilerplate wrapper. Also as this doesn't require any target specific hacks we only need to build the stubs once. Signed-off-by: Alex Bennée Acked-by: Mark Cave-Ayland --- v2 - update to new inheritance scheme - move build to common code --- include/hw/virtio/vhost-user-i2c.h | 18 +- hw/virtio/vhost-user-i2c.c | 255 ++--------------------------- hw/virtio/meson.build | 5 +- 3 files changed, 26 insertions(+), 252 deletions(-) diff --git a/include/hw/virtio/vhost-user-i2c.h b/include/hw/virtio/vhost-user-i2c.h index 0f7acd40e3..47153782d1 100644 --- a/include/hw/virtio/vhost-user-i2c.h +++ b/include/hw/virtio/vhost-user-i2c.h @@ -12,20 +12,18 @@ #include "hw/virtio/vhost.h" #include "hw/virtio/vhost-user.h" +#include "hw/virtio/virtio.h" +#include "hw/virtio/vhost.h" +#include "hw/virtio/vhost-user.h" +#include "hw/virtio/vhost-user-device.h" + #define TYPE_VHOST_USER_I2C "vhost-user-i2c-device" OBJECT_DECLARE_SIMPLE_TYPE(VHostUserI2C, VHOST_USER_I2C) struct VHostUserI2C { - VirtIODevice parent; - CharBackend chardev; - struct vhost_virtqueue *vhost_vq; - struct vhost_dev vhost_dev; - VhostUserState vhost_user; - VirtQueue *vq; - bool connected; + /*< private >*/ + VHostUserBase parent; + /*< public >*/ }; -/* Virtio Feature bits */ -#define VIRTIO_I2C_F_ZERO_LENGTH_REQUEST 0 - #endif /* QEMU_VHOST_USER_I2C_H */ diff --git a/hw/virtio/vhost-user-i2c.c b/hw/virtio/vhost-user-i2c.c index 60eaf0d95b..4a1f644a87 100644 --- a/hw/virtio/vhost-user-i2c.c +++ b/hw/virtio/vhost-user-i2c.c @@ -14,237 +14,21 @@ #include "qemu/error-report.h" #include "standard-headers/linux/virtio_ids.h" -static const int feature_bits[] = { - VIRTIO_I2C_F_ZERO_LENGTH_REQUEST, - VIRTIO_F_RING_RESET, - VHOST_INVALID_FEATURE_BIT +static Property vi2c_properties[] = { + DEFINE_PROP_CHR("chardev", VHostUserBase, chardev), + DEFINE_PROP_END_OF_LIST(), }; -static void vu_i2c_start(VirtIODevice *vdev) -{ - BusState *qbus = BUS(qdev_get_parent_bus(DEVICE(vdev))); - VirtioBusClass *k = VIRTIO_BUS_GET_CLASS(qbus); - VHostUserI2C *i2c = VHOST_USER_I2C(vdev); - int ret, i; - - if (!k->set_guest_notifiers) { - error_report("binding does not support guest notifiers"); - return; - } - - ret = vhost_dev_enable_notifiers(&i2c->vhost_dev, vdev); - if (ret < 0) { - error_report("Error enabling host notifiers: %d", -ret); - return; - } - - ret = k->set_guest_notifiers(qbus->parent, i2c->vhost_dev.nvqs, true); - if (ret < 0) { - error_report("Error binding guest notifier: %d", -ret); - goto err_host_notifiers; - } - - i2c->vhost_dev.acked_features = vdev->guest_features; - - ret = vhost_dev_start(&i2c->vhost_dev, vdev, true); - if (ret < 0) { - error_report("Error starting vhost-user-i2c: %d", -ret); - goto err_guest_notifiers; - } - - /* - * guest_notifier_mask/pending not used yet, so just unmask - * everything here. virtio-pci will do the right thing by - * enabling/disabling irqfd. - */ - for (i = 0; i < i2c->vhost_dev.nvqs; i++) { - vhost_virtqueue_mask(&i2c->vhost_dev, vdev, i, false); - } - - return; - -err_guest_notifiers: - k->set_guest_notifiers(qbus->parent, i2c->vhost_dev.nvqs, false); -err_host_notifiers: - vhost_dev_disable_notifiers(&i2c->vhost_dev, vdev); -} - -static void vu_i2c_stop(VirtIODevice *vdev) -{ - VHostUserI2C *i2c = VHOST_USER_I2C(vdev); - BusState *qbus = BUS(qdev_get_parent_bus(DEVICE(vdev))); - VirtioBusClass *k = VIRTIO_BUS_GET_CLASS(qbus); - int ret; - - if (!k->set_guest_notifiers) { - return; - } - - vhost_dev_stop(&i2c->vhost_dev, vdev, true); - - ret = k->set_guest_notifiers(qbus->parent, i2c->vhost_dev.nvqs, false); - if (ret < 0) { - error_report("vhost guest notifier cleanup failed: %d", ret); - return; - } - - vhost_dev_disable_notifiers(&i2c->vhost_dev, vdev); -} - -static void vu_i2c_set_status(VirtIODevice *vdev, uint8_t status) -{ - VHostUserI2C *i2c = VHOST_USER_I2C(vdev); - bool should_start = virtio_device_should_start(vdev, status); - - if (vhost_dev_is_started(&i2c->vhost_dev) == should_start) { - return; - } - - if (should_start) { - vu_i2c_start(vdev); - } else { - vu_i2c_stop(vdev); - } -} - -static uint64_t vu_i2c_get_features(VirtIODevice *vdev, - uint64_t requested_features, Error **errp) -{ - VHostUserI2C *i2c = VHOST_USER_I2C(vdev); - - virtio_add_feature(&requested_features, VIRTIO_I2C_F_ZERO_LENGTH_REQUEST); - return vhost_get_features(&i2c->vhost_dev, feature_bits, requested_features); -} - -static void vu_i2c_handle_output(VirtIODevice *vdev, VirtQueue *vq) -{ - /* - * Not normally called; it's the daemon that handles the queue; - * however virtio's cleanup path can call this. - */ -} - -static void vu_i2c_guest_notifier_mask(VirtIODevice *vdev, int idx, bool mask) -{ - VHostUserI2C *i2c = VHOST_USER_I2C(vdev); - - vhost_virtqueue_mask(&i2c->vhost_dev, vdev, idx, mask); -} - -static bool vu_i2c_guest_notifier_pending(VirtIODevice *vdev, int idx) -{ - VHostUserI2C *i2c = VHOST_USER_I2C(vdev); - - return vhost_virtqueue_pending(&i2c->vhost_dev, idx); -} - -static void do_vhost_user_cleanup(VirtIODevice *vdev, VHostUserI2C *i2c) -{ - vhost_user_cleanup(&i2c->vhost_user); - virtio_delete_queue(i2c->vq); - virtio_cleanup(vdev); -} - -static int vu_i2c_connect(DeviceState *dev) -{ - VirtIODevice *vdev = VIRTIO_DEVICE(dev); - VHostUserI2C *i2c = VHOST_USER_I2C(vdev); - - if (i2c->connected) { - return 0; - } - i2c->connected = true; - - /* restore vhost state */ - if (virtio_device_started(vdev, vdev->status)) { - vu_i2c_start(vdev); - } - - return 0; -} - -static void vu_i2c_disconnect(DeviceState *dev) -{ - VirtIODevice *vdev = VIRTIO_DEVICE(dev); - VHostUserI2C *i2c = VHOST_USER_I2C(vdev); - - if (!i2c->connected) { - return; - } - i2c->connected = false; - - if (vhost_dev_is_started(&i2c->vhost_dev)) { - vu_i2c_stop(vdev); - } -} - -static void vu_i2c_event(void *opaque, QEMUChrEvent event) +static void vi2c_realize(DeviceState *dev, Error **errp) { - DeviceState *dev = opaque; - VirtIODevice *vdev = VIRTIO_DEVICE(dev); - VHostUserI2C *i2c = VHOST_USER_I2C(vdev); - - switch (event) { - case CHR_EVENT_OPENED: - if (vu_i2c_connect(dev) < 0) { - qemu_chr_fe_disconnect(&i2c->chardev); - return; - } - break; - case CHR_EVENT_CLOSED: - vu_i2c_disconnect(dev); - break; - case CHR_EVENT_BREAK: - case CHR_EVENT_MUX_IN: - case CHR_EVENT_MUX_OUT: - /* Ignore */ - break; - } -} - -static void vu_i2c_device_realize(DeviceState *dev, Error **errp) -{ - VirtIODevice *vdev = VIRTIO_DEVICE(dev); - VHostUserI2C *i2c = VHOST_USER_I2C(dev); - int ret; - - if (!i2c->chardev.chr) { - error_setg(errp, "vhost-user-i2c: missing chardev"); - return; - } - - if (!vhost_user_init(&i2c->vhost_user, &i2c->chardev, errp)) { - return; - } - - virtio_init(vdev, VIRTIO_ID_I2C_ADAPTER, 0); + VHostUserBase *vub = VHOST_USER_BASE(dev); + VHostUserBaseClass *vubc = VHOST_USER_BASE_GET_CLASS(dev); - i2c->vhost_dev.nvqs = 1; - i2c->vq = virtio_add_queue(vdev, 4, vu_i2c_handle_output); - i2c->vhost_dev.vqs = g_new0(struct vhost_virtqueue, i2c->vhost_dev.nvqs); + /* Fixed for I2C */ + vub->virtio_id = VIRTIO_ID_I2C_ADAPTER; + vub->num_vqs = 1; - ret = vhost_dev_init(&i2c->vhost_dev, &i2c->vhost_user, - VHOST_BACKEND_TYPE_USER, 0, errp); - if (ret < 0) { - g_free(i2c->vhost_dev.vqs); - do_vhost_user_cleanup(vdev, i2c); - } - - qemu_chr_fe_set_handlers(&i2c->chardev, NULL, NULL, vu_i2c_event, NULL, - dev, NULL, true); -} - -static void vu_i2c_device_unrealize(DeviceState *dev) -{ - VirtIODevice *vdev = VIRTIO_DEVICE(dev); - VHostUserI2C *i2c = VHOST_USER_I2C(dev); - struct vhost_virtqueue *vhost_vqs = i2c->vhost_dev.vqs; - - /* This will stop vhost backend if appropriate. */ - vu_i2c_set_status(vdev, 0); - vhost_dev_cleanup(&i2c->vhost_dev); - g_free(vhost_vqs); - do_vhost_user_cleanup(vdev, i2c); + vubc->parent_realize(dev, errp); } static const VMStateDescription vu_i2c_vmstate = { @@ -252,30 +36,21 @@ static const VMStateDescription vu_i2c_vmstate = { .unmigratable = 1, }; -static Property vu_i2c_properties[] = { - DEFINE_PROP_CHR("chardev", VHostUserI2C, chardev), - DEFINE_PROP_END_OF_LIST(), -}; - static void vu_i2c_class_init(ObjectClass *klass, void *data) { DeviceClass *dc = DEVICE_CLASS(klass); - VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass); + VHostUserBaseClass *vubc = VHOST_USER_BASE_CLASS(klass); - device_class_set_props(dc, vu_i2c_properties); dc->vmsd = &vu_i2c_vmstate; + device_class_set_props(dc, vi2c_properties); + device_class_set_parent_realize(dc, vi2c_realize, + &vubc->parent_realize); set_bit(DEVICE_CATEGORY_INPUT, dc->categories); - vdc->realize = vu_i2c_device_realize; - vdc->unrealize = vu_i2c_device_unrealize; - vdc->get_features = vu_i2c_get_features; - vdc->set_status = vu_i2c_set_status; - vdc->guest_notifier_mask = vu_i2c_guest_notifier_mask; - vdc->guest_notifier_pending = vu_i2c_guest_notifier_pending; } static const TypeInfo vu_i2c_info = { .name = TYPE_VHOST_USER_I2C, - .parent = TYPE_VIRTIO_DEVICE, + .parent = TYPE_VHOST_USER_BASE, .instance_size = sizeof(VHostUserI2C), .class_init = vu_i2c_class_init, }; diff --git a/hw/virtio/meson.build b/hw/virtio/meson.build index 8c6cb2143d..31c0406f05 100644 --- a/hw/virtio/meson.build +++ b/hw/virtio/meson.build @@ -10,6 +10,9 @@ softmmu_virtio_ss.add(when: ['CONFIG_VIRTIO_PCI', 'CONFIG_VHOST_USER_RNG'], softmmu_virtio_ss.add(when: 'CONFIG_VHOST_USER_GPIO', if_true: files('vhost-user-gpio.c')) softmmu_virtio_ss.add(when: ['CONFIG_VIRTIO_PCI', 'CONFIG_VHOST_USER_GPIO'], if_true: files('vhost-user-gpio-pci.c')) +softmmu_virtio_ss.add(when: 'CONFIG_VHOST_USER_I2C', if_true: files('vhost-user-i2c.c')) +softmmu_virtio_ss.add(when: ['CONFIG_VIRTIO_PCI', 'CONFIG_VHOST_USER_I2C'], + if_true: files('vhost-user-i2c-pci.c')) specific_virtio_ss = ss.source_set() specific_virtio_ss.add(files('virtio.c')) @@ -39,14 +42,12 @@ specific_virtio_ss.add(when: 'CONFIG_VHOST_USER_VSOCK', if_true: files('vhost-us specific_virtio_ss.add(when: 'CONFIG_VIRTIO_RNG', if_true: files('virtio-rng.c')) specific_virtio_ss.add(when: 'CONFIG_VIRTIO_IOMMU', if_true: files('virtio-iommu.c')) specific_virtio_ss.add(when: 'CONFIG_VIRTIO_MEM', if_true: files('virtio-mem.c')) -specific_virtio_ss.add(when: 'CONFIG_VHOST_USER_I2C', if_true: files('vhost-user-i2c.c')) specific_virtio_ss.add(when: 'CONFIG_VHOST_VDPA_DEV', if_true: files('vdpa-dev.c')) virtio_pci_ss = ss.source_set() virtio_pci_ss.add(when: 'CONFIG_VHOST_VSOCK', if_true: files('vhost-vsock-pci.c')) virtio_pci_ss.add(when: 'CONFIG_VHOST_USER_VSOCK', if_true: files('vhost-user-vsock-pci.c')) virtio_pci_ss.add(when: 'CONFIG_VHOST_USER_BLK', if_true: files('vhost-user-blk-pci.c')) -virtio_pci_ss.add(when: 'CONFIG_VHOST_USER_I2C', if_true: files('vhost-user-i2c-pci.c')) virtio_pci_ss.add(when: 'CONFIG_VHOST_USER_INPUT', if_true: files('vhost-user-input-pci.c')) virtio_pci_ss.add(when: 'CONFIG_VHOST_USER_SCSI', if_true: files('vhost-user-scsi-pci.c')) virtio_pci_ss.add(when: 'CONFIG_VHOST_SCSI', if_true: files('vhost-scsi-pci.c'))