From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-15.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 008DAC433ED for ; Thu, 15 Apr 2021 08:07:31 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 5F3BE6113B for ; Thu, 15 Apr 2021 08:07:30 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 5F3BE6113B Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:52008 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lWx29-0005hM-8Y for qemu-devel@archiver.kernel.org; Thu, 15 Apr 2021 04:07:29 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:40726) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lWwzm-000457-78 for qemu-devel@nongnu.org; Thu, 15 Apr 2021 04:05:02 -0400 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:21705) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lWwzk-0000nR-2b for qemu-devel@nongnu.org; Thu, 15 Apr 2021 04:05:01 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1618473899; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=Qp2GXWW4hbtIRJIYBfKSWq35Kn2yR/Zh2tbJaZmorFQ=; b=KpxyStLw93jCDkTE0/Ui4a5GSGI3yCXaVIipNq6O/3NGJP48JX5+MnwP1bjl3dFxvtMdJM s5980vhDG00lucUeLgsBrL/bMJz+oZKZfGIuQQCc4Vcva4RT7Ip/nMB4Yw9MzOv2kah4Bf MkioiWU7T6HrHwzjMJ5ggl3RXnSEznY= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-577-4hPgHb1LMSSSht4S2MxUhA-1; Thu, 15 Apr 2021 04:04:57 -0400 X-MC-Unique: 4hPgHb1LMSSSht4S2MxUhA-1 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.phx2.redhat.com [10.5.11.22]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 878879F92D; Thu, 15 Apr 2021 08:04:56 +0000 (UTC) Received: from localhost.localdomain (ovpn-12-61.pek2.redhat.com [10.72.12.61]) by smtp.corp.redhat.com (Postfix) with ESMTP id D749F10023B0; Thu, 15 Apr 2021 08:04:54 +0000 (UTC) From: Jason Wang To: mst@redhat.com, qemu-devel@nongnu.org Subject: [PATCH 2/2] vhost-vdpa: doorbell mapping support Date: Thu, 15 Apr 2021 16:04:44 +0800 Message-Id: <20210415080444.44645-3-jasowang@redhat.com> In-Reply-To: <20210415080444.44645-1-jasowang@redhat.com> References: <20210415080444.44645-1-jasowang@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=jasowang@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset="US-ASCII" Received-SPF: pass client-ip=216.205.24.124; envelope-from=jasowang@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -27 X-Spam_score: -2.8 X-Spam_bar: -- X-Spam_report: (-2.8 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: elic@nvidia.com, Jason Wang Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" This patch implements the doorbell mapping support for vhost-vDPA. This is simply done by using mmap()/munmap() for the vhost-vDPA fd during device start/stop. For the device without doorbell support, we fall back to eventfd based notification gracefully. Signed-off-by: Jason Wang --- hw/virtio/vhost-vdpa.c | 85 ++++++++++++++++++++++++++++++++++ include/hw/virtio/vhost-vdpa.h | 7 +++ 2 files changed, 92 insertions(+) diff --git a/hw/virtio/vhost-vdpa.c b/hw/virtio/vhost-vdpa.c index dd4321bac2..c3a3b7566f 100644 --- a/hw/virtio/vhost-vdpa.c +++ b/hw/virtio/vhost-vdpa.c @@ -285,12 +285,95 @@ static int vhost_vdpa_init(struct vhost_dev *dev, void *opaque) return 0; } +static void vhost_vdpa_host_notifier_uninit(struct vhost_dev *dev, + int queue_index) +{ + size_t page_size = qemu_real_host_page_size; + struct vhost_vdpa *v = dev->opaque; + VirtIODevice *vdev = dev->vdev; + VhostVDPAHostNotifier *n; + + n = &v->notifier[queue_index]; + + if (n->addr) { + virtio_queue_set_host_notifier_mr(vdev, queue_index, &n->mr, false); + object_unparent(OBJECT(&n->mr)); + munmap(n->addr, page_size); + n->addr = NULL; + } +} + +static void vhost_vdpa_host_notifiers_uninit(struct vhost_dev *dev, int n) +{ + int i; + + for (i = 0; i < n; i++) { + vhost_vdpa_host_notifier_uninit(dev, i); + } +} + +static int vhost_vdpa_host_notifier_init(struct vhost_dev *dev, int queue_index) +{ + size_t page_size = qemu_real_host_page_size; + struct vhost_vdpa *v = dev->opaque; + VirtIODevice *vdev = dev->vdev; + VhostVDPAHostNotifier *n; + int fd = v->device_fd; + void *addr; + char *name; + + vhost_vdpa_host_notifier_uninit(dev, queue_index); + + n = &v->notifier[queue_index]; + + addr = mmap(NULL, page_size, PROT_WRITE, MAP_SHARED, fd, + queue_index * page_size); + if (addr == MAP_FAILED) { + goto err; + } + + name = g_strdup_printf("vhost-vdpa/host-notifier@%p mmaps[%d]", + v, queue_index); + memory_region_init_ram_device_ptr(&n->mr, OBJECT(vdev), name, + page_size, addr); + g_free(name); + + if (virtio_queue_set_host_notifier_mr(vdev, queue_index, &n->mr, true)) { + munmap(addr, page_size); + goto err; + } + n->addr = addr; + + return 0; + +err: + return -1; +} + +static void vhost_vdpa_host_notifiers_init(struct vhost_dev *dev) +{ + int i; + + for (i = 0; i < dev->nvqs; i++) { + if (vhost_vdpa_host_notifier_init(dev, i)) { + goto err; + } + } + + return; + +err: + vhost_vdpa_host_notifiers_uninit(dev, i); + return; +} + static int vhost_vdpa_cleanup(struct vhost_dev *dev) { struct vhost_vdpa *v; assert(dev->vhost_ops->backend_type == VHOST_BACKEND_TYPE_VDPA); v = dev->opaque; trace_vhost_vdpa_cleanup(dev, v); + vhost_vdpa_host_notifiers_uninit(dev, dev->nvqs); memory_listener_unregister(&v->listener); dev->opaque = NULL; @@ -467,6 +550,7 @@ static int vhost_vdpa_dev_start(struct vhost_dev *dev, bool started) if (started) { uint8_t status = 0; memory_listener_register(&v->listener, &address_space_memory); + vhost_vdpa_host_notifiers_init(dev); vhost_vdpa_set_vring_ready(dev); vhost_vdpa_add_status(dev, VIRTIO_CONFIG_S_DRIVER_OK); vhost_vdpa_call(dev, VHOST_VDPA_GET_STATUS, &status); @@ -476,6 +560,7 @@ static int vhost_vdpa_dev_start(struct vhost_dev *dev, bool started) vhost_vdpa_reset_device(dev); vhost_vdpa_add_status(dev, VIRTIO_CONFIG_S_ACKNOWLEDGE | VIRTIO_CONFIG_S_DRIVER); + vhost_vdpa_host_notifiers_uninit(dev, dev->nvqs); memory_listener_unregister(&v->listener); return 0; diff --git a/include/hw/virtio/vhost-vdpa.h b/include/hw/virtio/vhost-vdpa.h index 9b81a409da..0f11ecff34 100644 --- a/include/hw/virtio/vhost-vdpa.h +++ b/include/hw/virtio/vhost-vdpa.h @@ -14,11 +14,18 @@ #include "hw/virtio/virtio.h" +typedef struct VhostVDPAHostNotifier { + MemoryRegion mr; + void *addr; +} VhostVDPAHostNotifier; + typedef struct vhost_vdpa { int device_fd; uint32_t msg_type; MemoryListener listener; struct vhost_dev *dev; + VhostVDPAHostNotifier notifier[VIRTIO_QUEUE_MAX]; + bool host_notifier_set; } VhostVDPA; extern AddressSpace address_space_memory; -- 2.25.1