From patchwork Thu Sep 24 03:21:09 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jason Wang X-Patchwork-Id: 11795939 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 6BB0892C for ; Thu, 24 Sep 2020 03:23:27 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4D5FF23899 for ; Thu, 24 Sep 2020 03:23:27 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="hW0K2Fiw" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726851AbgIXDXY (ORCPT ); Wed, 23 Sep 2020 23:23:24 -0400 Received: from us-smtp-delivery-124.mimecast.com ([63.128.21.124]:45328 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726852AbgIXDXW (ORCPT ); Wed, 23 Sep 2020 23:23:22 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1600917800; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=i1JaCeCx7H9P9WtWtFi2cpiOug9qVcaSqLsJ7oo2Okc=; b=hW0K2FiwguCN6THx8haIa0RINY9DutJcl7w8o0dFUqzhjqbltD4DTTE4dDQZQLHF2eQmVW YOjdDhd+XN4CsPVO21IfrqsiSnRCeEvJiemrW2RRf2c+C95oiN+GWXUskYXAiS5PQ5U9tH C4QJtN1SS/M12+SueHSVWITHcctMKsI= 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-506-GM6s3bLuNriCCXx63oQUYw-1; Wed, 23 Sep 2020 23:23:16 -0400 X-MC-Unique: GM6s3bLuNriCCXx63oQUYw-1 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.phx2.redhat.com [10.5.11.15]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 768B31007464; Thu, 24 Sep 2020 03:23:14 +0000 (UTC) Received: from jason-ThinkPad-X1-Carbon-6th.redhat.com (ovpn-13-193.pek2.redhat.com [10.72.13.193]) by smtp.corp.redhat.com (Postfix) with ESMTP id F27403782; Thu, 24 Sep 2020 03:22:58 +0000 (UTC) From: Jason Wang To: mst@redhat.com, jasowang@redhat.com Cc: lulu@redhat.com, kvm@vger.kernel.org, virtualization@lists.linux-foundation.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, rob.miller@broadcom.com, lingshan.zhu@intel.com, eperezma@redhat.com, hanand@xilinx.com, mhabets@solarflare.com, eli@mellanox.com, amorenoz@redhat.com, maxime.coquelin@redhat.com, stefanha@redhat.com, sgarzare@redhat.com Subject: [RFC PATCH 08/24] vdpa: introduce virtqueue groups Date: Thu, 24 Sep 2020 11:21:09 +0800 Message-Id: <20200924032125.18619-9-jasowang@redhat.com> In-Reply-To: <20200924032125.18619-1-jasowang@redhat.com> References: <20200924032125.18619-1-jasowang@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org This patch introduces virtqueue groups to vDPA device. The virtqueue group is the minimal set of virtqueues that must share an address space. And the adddress space identifier could only be attached to a specific virtqueue group. A new mandated bus operation is introduced to get the virtqueue group ID for a specific virtqueue. All the vDPA device drivers were converted to simply support a single virtqueue group. Signed-off-by: Jason Wang --- drivers/vdpa/ifcvf/ifcvf_main.c | 9 ++++++++- drivers/vdpa/mlx5/net/mlx5_vnet.c | 8 +++++++- drivers/vdpa/vdpa.c | 4 +++- drivers/vdpa/vdpa_sim/vdpa_sim.c | 11 ++++++++++- include/linux/vdpa.h | 12 +++++++++--- 5 files changed, 37 insertions(+), 7 deletions(-) diff --git a/drivers/vdpa/ifcvf/ifcvf_main.c b/drivers/vdpa/ifcvf/ifcvf_main.c index 076d7ac5e723..e6a0be374e51 100644 --- a/drivers/vdpa/ifcvf/ifcvf_main.c +++ b/drivers/vdpa/ifcvf/ifcvf_main.c @@ -327,6 +327,11 @@ static u32 ifcvf_vdpa_get_vq_align(struct vdpa_device *vdpa_dev) return IFCVF_QUEUE_ALIGNMENT; } +static u32 ifcvf_vdpa_get_vq_group(struct vdpa_device *vdpa, u16 idx) +{ + return 0; +} + static void ifcvf_vdpa_get_config(struct vdpa_device *vdpa_dev, unsigned int offset, void *buf, unsigned int len) @@ -387,6 +392,7 @@ static const struct vdpa_config_ops ifc_vdpa_ops = { .get_device_id = ifcvf_vdpa_get_device_id, .get_vendor_id = ifcvf_vdpa_get_vendor_id, .get_vq_align = ifcvf_vdpa_get_vq_align, + .get_vq_group = ifcvf_vdpa_get_vq_group, .get_config = ifcvf_vdpa_get_config, .set_config = ifcvf_vdpa_set_config, .set_config_cb = ifcvf_vdpa_set_config_cb, @@ -434,7 +440,8 @@ static int ifcvf_probe(struct pci_dev *pdev, const struct pci_device_id *id) adapter = vdpa_alloc_device(struct ifcvf_adapter, vdpa, dev, &ifc_vdpa_ops, - IFCVF_MAX_QUEUE_PAIRS * 2); + IFCVF_MAX_QUEUE_PAIRS * 2, 1); + if (adapter == NULL) { IFCVF_ERR(pdev, "Failed to allocate vDPA structure"); return -ENOMEM; diff --git a/drivers/vdpa/mlx5/net/mlx5_vnet.c b/drivers/vdpa/mlx5/net/mlx5_vnet.c index 9df69d5efe8c..4e480f4f754e 100644 --- a/drivers/vdpa/mlx5/net/mlx5_vnet.c +++ b/drivers/vdpa/mlx5/net/mlx5_vnet.c @@ -1428,6 +1428,11 @@ static u32 mlx5_vdpa_get_vq_align(struct vdpa_device *vdev) return PAGE_SIZE; } +static u32 mlx5_vdpa_get_vq_group(struct vdpa_device *vdpa, u16 idx) +{ + return 0; +} + enum { MLX5_VIRTIO_NET_F_GUEST_CSUM = 1 << 9, MLX5_VIRTIO_NET_F_CSUM = 1 << 10, MLX5_VIRTIO_NET_F_HOST_TSO6 = 1 << 11, @@ -1838,6 +1843,7 @@ static const struct vdpa_config_ops mlx5_vdpa_ops = { .get_vq_notification = mlx5_get_vq_notification, .get_vq_irq = mlx5_get_vq_irq, .get_vq_align = mlx5_vdpa_get_vq_align, + .get_vq_group = mlx5_vdpa_get_vq_group, .get_features = mlx5_vdpa_get_features, .set_features = mlx5_vdpa_set_features, .set_config_cb = mlx5_vdpa_set_config_cb, @@ -1925,7 +1931,7 @@ void *mlx5_vdpa_add_dev(struct mlx5_core_dev *mdev) max_vqs = min_t(u32, max_vqs, MLX5_MAX_SUPPORTED_VQS); ndev = vdpa_alloc_device(struct mlx5_vdpa_net, mvdev.vdev, mdev->device, &mlx5_vdpa_ops, - 2 * mlx5_vdpa_max_qps(max_vqs)); + 2 * mlx5_vdpa_max_qps(max_vqs), 1); if (IS_ERR(ndev)) return ndev; diff --git a/drivers/vdpa/vdpa.c b/drivers/vdpa/vdpa.c index a69ffc991e13..46399746ec7c 100644 --- a/drivers/vdpa/vdpa.c +++ b/drivers/vdpa/vdpa.c @@ -62,6 +62,7 @@ static void vdpa_release_dev(struct device *d) * @parent: the parent device * @config: the bus operations that is supported by this device * @nvqs: number of virtqueues supported by this device + * @ngroups: number of groups supported by this device * @size: size of the parent structure that contains private data * * Driver should use vdpa_alloc_device() wrapper macro instead of @@ -72,7 +73,7 @@ static void vdpa_release_dev(struct device *d) */ struct vdpa_device *__vdpa_alloc_device(struct device *parent, const struct vdpa_config_ops *config, - int nvqs, + int nvqs, unsigned int ngroups, size_t size) { struct vdpa_device *vdev; @@ -100,6 +101,7 @@ struct vdpa_device *__vdpa_alloc_device(struct device *parent, vdev->config = config; vdev->features_valid = false; vdev->nvqs = nvqs; + vdev->ngroups = ngroups; err = dev_set_name(&vdev->dev, "vdpa%u", vdev->index); if (err) diff --git a/drivers/vdpa/vdpa_sim/vdpa_sim.c b/drivers/vdpa/vdpa_sim/vdpa_sim.c index 62d640327145..6669c561bc6e 100644 --- a/drivers/vdpa/vdpa_sim/vdpa_sim.c +++ b/drivers/vdpa/vdpa_sim/vdpa_sim.c @@ -75,6 +75,7 @@ struct vdpasim { u32 status; u32 generation; u64 features; + u32 groups; /* spinlock to synchronize iommu table */ spinlock_t iommu_lock; }; @@ -352,7 +353,8 @@ static struct vdpasim *vdpasim_create(void) else ops = &vdpasim_net_config_ops; - vdpasim = vdpa_alloc_device(struct vdpasim, vdpa, NULL, ops, VDPASIM_VQ_NUM); + vdpasim = vdpa_alloc_device(struct vdpasim, vdpa, NULL, ops, + VDPASIM_VQ_NUM, 1); if (!vdpasim) goto err_alloc; @@ -481,6 +483,11 @@ static u32 vdpasim_get_vq_align(struct vdpa_device *vdpa) return VDPASIM_QUEUE_ALIGN; } +static u32 vdpasim_get_vq_group(struct vdpa_device *vdpa, u16 idx) +{ + return 0; +} + static u64 vdpasim_get_features(struct vdpa_device *vdpa) { return vdpasim_features; @@ -646,6 +653,7 @@ static const struct vdpa_config_ops vdpasim_net_config_ops = { .set_vq_state = vdpasim_set_vq_state, .get_vq_state = vdpasim_get_vq_state, .get_vq_align = vdpasim_get_vq_align, + .get_vq_group = vdpasim_get_vq_group, .get_features = vdpasim_get_features, .set_features = vdpasim_set_features, .set_config_cb = vdpasim_set_config_cb, @@ -672,6 +680,7 @@ static const struct vdpa_config_ops vdpasim_net_batch_config_ops = { .set_vq_state = vdpasim_set_vq_state, .get_vq_state = vdpasim_get_vq_state, .get_vq_align = vdpasim_get_vq_align, + .get_vq_group = vdpasim_get_vq_group, .get_features = vdpasim_get_features, .set_features = vdpasim_set_features, .set_config_cb = vdpasim_set_config_cb, diff --git a/include/linux/vdpa.h b/include/linux/vdpa.h index df169c2f5c0f..d829512efd27 100644 --- a/include/linux/vdpa.h +++ b/include/linux/vdpa.h @@ -51,6 +51,7 @@ struct vdpa_device { unsigned int index; bool features_valid; int nvqs; + unsigned int ngroups; }; /** @@ -109,6 +110,10 @@ struct vdpa_device { * for the device * @vdev: vdpa device * Returns virtqueue algin requirement + * @get_vq_group: Get the group id for a specific virtqueue + * @vdev: vdpa device + * @idx: virtqueue index + * Returns u32: group id for this virtqueue * @get_features: Get virtio features supported by the device * @vdev: vdpa device * Returns the virtio features support by the @@ -203,6 +208,7 @@ struct vdpa_config_ops { /* Device ops */ u32 (*get_vq_align)(struct vdpa_device *vdev); + u32 (*get_vq_group)(struct vdpa_device *vdev, u16 idx); u64 (*get_features)(struct vdpa_device *vdev); int (*set_features)(struct vdpa_device *vdev, u64 features); void (*set_config_cb)(struct vdpa_device *vdev, @@ -230,12 +236,12 @@ struct vdpa_config_ops { struct vdpa_device *__vdpa_alloc_device(struct device *parent, const struct vdpa_config_ops *config, - int nvqs, + int nvqs, unsigned int ngroups, size_t size); -#define vdpa_alloc_device(dev_struct, member, parent, config, nvqs) \ +#define vdpa_alloc_device(dev_struct, member, parent, config, nvqs, ngroups) \ container_of(__vdpa_alloc_device( \ - parent, config, nvqs, \ + parent, config, nvqs, ngroups, \ sizeof(dev_struct) + \ BUILD_BUG_ON_ZERO(offsetof( \ dev_struct, member))), \