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Date: Wed, 11 May 2016 18:05:17 -0700
From: Yuanhan Liu <yuanhan.liu@linux.intel.com>
To: Jianfeng Tan <jianfeng.tan@intel.com>
Cc: dev@dpdk.org, Huawei Xie <huawei.xie@intel.com>,
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Subject: Re: [dpdk-dev] [PATCH v4 5/8] virtio-user: add device emulation
	layer APIs
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On Fri, Apr 29, 2016 at 01:18:33AM +0000, Jianfeng Tan wrote:
> +static int
> +kick_one_vq(struct virtio_user_hw *hw, struct virtqueue *vq,
> +	    unsigned queue_sel)

Firstly, "dev" is a more common word than "hw" here. So, name the struct
to "virtio_user_device", and name the var to "dev".

And you are still mixing virtio driver and virtio device emulation here.
Say, struct virtqueue should not be used here: it belongs to driver.
Instead, you should define your own. It could be fair simple that is
enough for current usage:

struct virtqueue {
	uint32_t num;
	uint64_t desc_addr;
	uint64_t avail_addr;
	uint64_t used_addr;
};

That could let us not depend on any structures (or just few if not
possible) from virtio PMD driver.

	--yliu
> +{
> +	int callfd, kickfd;
> +	struct vhost_vring_file file;
> +	struct vhost_vring_state state;
> +	struct vhost_vring_addr addr = {
> +		.index = queue_sel,
> +		.desc_user_addr = (uint64_t)(uintptr_t)vq->vq_ring.desc,
> +		.avail_user_addr = (uint64_t)(uintptr_t)vq->vq_ring.avail,
> +		.used_user_addr = (uint64_t)(uintptr_t)vq->vq_ring.used,
> +		.log_guest_addr = 0,
> +		.flags = 0, /* disable log */
> +	};