From: Jens Freimann <jfreimann@redhat.com>
To: Jason Wang <jasowang@redhat.com>
Cc: dev@dpdk.org, tiwei.bie@intel.com, yliu@fridaylinux.org,
maxime.coquelin@redhat.com, mst@redhat.com
Subject: Re: [dpdk-dev] [PATCH 07/14] net/virtio: implement transmit path for packed queues
Date: Tue, 13 Feb 2018 10:10:18 +0100 [thread overview]
Message-ID: <20180213091018.ygsbkg5weguumhpm@dhcp-192-241.str.redhat.com> (raw)
In-Reply-To: <c095c8f3-8445-2cec-ff87-3b8d4c4325be@redhat.com>
On Mon, Feb 12, 2018 at 09:16:27PM +0800, Jason Wang wrote:
>
>
>On 2018???01???29??? 22:11, Jens Freimann wrote:
>>+/* Cleanup from completed transmits. */
>>+static void
>>+virtio_xmit_cleanup(struct virtqueue *vq)
>>+{
>>+ uint16_t idx;
>>+ uint16_t size = vq->vq_nentries;
>>+ struct vring_desc_1_1 *desc = vq->vq_ring.desc_1_1;
>>+
>>+ idx = vq->vq_used_cons_idx & (size - 1);
>>+ while (desc_is_used(&desc[idx]) &&
>>+ vq->vq_free_cnt < size) {
>>+ while (desc[idx].flags & VRING_DESC_F_NEXT) {
>>+ vq->vq_free_cnt++;
>>+ idx = ++vq->vq_used_cons_idx & (size - 1);
>>+ }
>>+ vq->vq_free_cnt++;
>>+ idx = ++vq->vq_used_cons_idx & (size - 1);
>>+ }
>>+}
>
>This looks like a violation of the spec. In 2.6.6 Next Flag:
>Descriptor Chaining. It said:
>
>"VIRTQ_DESC_F_NEXT is reserved in used descriptors, and should be
>ignored by drivers."
I think you are right. I will rework this bit.
>
>(Looking at the device implementation, it was in fact an in order
>device which is said to be no in the cover).
Looking into this as well.
Thanks for the review!
regards,
Jens
next prev parent reply other threads:[~2018-02-13 9:10 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-01-29 14:11 [dpdk-dev] [PATCH 00/14] implement packed virtqueues Jens Freimann
2018-01-29 14:11 ` [dpdk-dev] [PATCH 01/14] net/virtio: vring init for packed queues Jens Freimann
2018-01-29 14:11 ` [dpdk-dev] [PATCH 02/14] net/virtio: don't call virtio_disable_intr() " Jens Freimann
2018-01-29 14:11 ` [dpdk-dev] [PATCH 03/14] net/virtio: add virtio 1.1 defines Jens Freimann
2018-01-29 14:11 ` [dpdk-dev] [PATCH 04/14] net/virtio: add packed virtqueue helpers Jens Freimann
2018-01-29 14:11 ` [dpdk-dev] [PATCH 05/14] net/virtio: don't dump split virtqueue data Jens Freimann
2018-01-29 14:11 ` [dpdk-dev] [PATCH 06/14] net/virtio-user: add option to use packed queues Jens Freimann
2018-01-29 14:11 ` [dpdk-dev] [PATCH 07/14] net/virtio: implement transmit path for " Jens Freimann
2018-02-12 13:16 ` Jason Wang
2018-02-13 9:10 ` Jens Freimann [this message]
2018-01-29 14:11 ` [dpdk-dev] [PATCH 08/14] net/virtio: implement receive " Jens Freimann
2018-01-29 14:11 ` [dpdk-dev] [PATCH 09/14] vhost: add virtio 1.1 defines Jens Freimann
2018-01-29 14:24 ` Yuanhan Liu
2018-01-29 14:28 ` Jens Freimann
2018-01-29 14:11 ` [dpdk-dev] [PATCH 10/14] vhost: vring address setup for packed queues Jens Freimann
2018-02-01 9:16 ` Maxime Coquelin
2018-01-29 14:11 ` [dpdk-dev] [PATCH 11/14] vhost: add helpers for packed virtqueues Jens Freimann
2018-02-01 9:20 ` Maxime Coquelin
2018-01-29 14:11 ` [dpdk-dev] [PATCH 12/14] vhost: dequeue for packed queues Jens Freimann
2018-02-01 9:35 ` Maxime Coquelin
2018-02-01 10:23 ` Jens Freimann
2018-01-29 14:11 ` [dpdk-dev] [PATCH 13/14] vhost: packed queue enqueue path Jens Freimann
2018-01-29 14:11 ` [dpdk-dev] [PATCH 14/14] vhost: enable packed virtqueues Jens Freimann
2018-01-30 10:45 ` Jens Freimann
2018-02-06 6:20 ` [dpdk-dev] [PATCH 00/14] implement " Jason Wang
2018-02-06 13:58 ` Jens Freimann
2018-02-07 8:37 ` Jason Wang
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