Re: [dpdk-dev] [PATCH 7/9] vfio_user: add client APIs of DMA/IRQ/region

["Xing, Beilei" <beilei.xing@intel.com>]

> -----Original Message-----
> From: dev <dev-bounces@dpdk.org> On Behalf Of Chenbo Xia
> Sent: Friday, December 18, 2020 3:39 PM
> To: dev@dpdk.org; thomas@monjalon.net; david.marchand@redhat.com
> Cc: stephen@networkplumber.org; Liang, Cunming
> <cunming.liang@intel.com>; Lu, Xiuchun <xiuchun.lu@intel.com>; Li, Miao
> <miao.li@intel.com>; Wu, Jingjing <jingjing.wu@intel.com>
> Subject: [dpdk-dev] [PATCH 7/9] vfio_user: add client APIs of DMA/IRQ/region
> 
> This patch introduces nine APIs
> - Device related:
>   rte_vfio_user_get_dev_info and rte_vfio_user_reset
> - DMA related:
>   rte_vfio_user_dma_map/unmap
> - Region related:
>   rte_vfio_user_get_reg_info and rte_vfio_user_region_read/write
> - IRQ related:
>   rte_vfio_user_get_irq_info and rte_vfio_user_set_irqs
> 
> Signed-off-by: Chenbo Xia <chenbo.xia@intel.com>
> Signed-off-by: Xiuchun Lu <xiuchun.lu@intel.com>
> ---
>  lib/librte_vfio_user/rte_vfio_user.h    | 168 ++++++++++
>  lib/librte_vfio_user/version.map        |   9 +
>  lib/librte_vfio_user/vfio_user_client.c | 412 ++++++++++++++++++++++++
>  3 files changed, 589 insertions(+)
> 
> diff --git a/lib/librte_vfio_user/rte_vfio_user.h
> b/lib/librte_vfio_user/rte_vfio_user.h
> index b09d83e224..fe27d05992 100644
> --- a/lib/librte_vfio_user/rte_vfio_user.h
> +++ b/lib/librte_vfio_user/rte_vfio_user.h
> @@ -229,6 +229,15 @@ int rte_vfio_user_set_irq_info(const char *sock_addr,


> +int rte_vfio_user_get_dev_info(int dev_id, struct vfio_device_info
> +*info) {
> +	VFIO_USER_MSG msg;
> +	struct vfio_user_client *dev;
> +	int ret;
> +	uint32_t sz = VFIO_USER_MSG_HDR_SIZE + sizeof(struct
> +vfio_device_info);
> +
> +	if (!info)
> +		return -EINVAL;
> +
> +	dev = vfio_client_devs.cl[dev_id];
> +	if (!dev) {
> +		VFIO_USER_LOG(ERR, "Failed to get device info: "
> +			"wrong device ID\n");
> +		return -EINVAL;
> +	}
> +
> +	memset(&msg, 0, sizeof(VFIO_USER_MSG));
> +	vfio_user_client_fill_hdr(&msg, VFIO_USER_DEVICE_GET_INFO, sz);
> +
> +	ret = vfio_user_client_send_recv(dev->sock.sock_fd, &msg);
> +	if (ret)
> +		return ret;
> +
> +	if (msg.flags & VFIO_USER_ERROR) {
> +		VFIO_USER_LOG(ERR, "Failed to get device info: %s\n",
> +				msg.err ? strerror(msg.err) : "Unknown error");
> +		return msg.err ? -(int)msg.err : -1;
> +	}
> +
> +	if (vfio_user_check_msg_fdnum(&msg, 0) != 0)
> +		return -1;
> +
> +	memcpy(info, &msg.payload.dev_info, sizeof(*info));
> +	return ret;
> +}
> +

Seems there's duplicate code in function get_xxx_info, double check and refine.