From: Reshma Pattan <reshma.pattan@intel.com>
To: Ferruh Yigit <ferruh.yigit@intel.com>, dev@dpdk.org
Subject: Re: [dpdk-dev] [PATCH 2/2] kdp: add virtual PMD for kernel slow data path communication
Date: Tue, 9 Feb 2016 17:33:55 +0000 [thread overview]
Message-ID: <56BA2303.3000809@intel.com> (raw)
In-Reply-To: <1453912360-18179-3-git-send-email-ferruh.yigit@intel.com>
Hi Ferruh,
On 1/27/2016 4:32 PM, Ferruh Yigit wrote:
> This patch provides slow data path communication to the Linux kernel.
> Patch is based on librte_kni, and heavily re-uses it.
>
> The main difference is librte_kni library converted into a PMD, to
> provide ease of use for applications.
>
> Now any application can use slow path communication without any update
> in application, because of existing eal support for virtual PMD.
>
> Also this PMD supports two methods to send packets to the Linux, first
> one is custom FIFO implementation with help of KDP kernel module, second
> one is Linux in-kernel tun/tap support. PMD first checks for KDP kernel
> module, if fails it tries to create and use a tap interface.
>
> With FIFO method: PMD's rx_pkt_burst() get packets from FIFO,
> and tx_pkt_burst() puts packet to the FIFO.
> The corresponding Linux virtual network device driver code
> also gets/puts packets from FIFO as they are coming from hardware.
>
> With tun/tap method: no external kernel module required, PMD reads from
> and writes packets to the tap interface file descriptor. Tap interface
> has performance penalty against FIFO implementation.
>
> Signed-off-by: Ferruh Yigit <ferruh.yigit@intel.com>
> ---
>
> diff --git a/doc/guides/nics/pcap_ring.rst b/doc/guides/nics/pcap_ring.rst
> index 46aa3ac..78b7b61 100644
> --- a/doc/guides/nics/pcap_ring.rst
> +++ b/doc/guides/nics/pcap_ring.rst
> @@ -28,11 +28,11 @@
> +
> +
> +DPDK application can be used to forward packages between these interfaces:
> +
Packages ==> packets.?
> diff --git a/drivers/net/kdp/rte_eth_kdp.c b/drivers/net/kdp/rte_eth_kdp.c
> new file mode 100644
> index 0000000..ac650d7
> --- /dev/null
> +++ b/drivers/net/kdp/rte_eth_kdp.c
> @@ -0,0 +1,481 @@
>
No public API to create KDP PMD device. We should have one right?
> diff --git a/drivers/net/kdp/rte_kdp.h b/drivers/net/kdp/rte_kdp.h
> new file mode 100644
> index 0000000..b9db048
> --- /dev/null
> +++ b/drivers/net/kdp/rte_kdp.h
> @@ -0,0 +1,126 @@
>
> +struct rte_kdp_tap *rte_kdp_tap_init(uint16_t port_id);
> +struct rte_kdp *rte_kdp_init(uint16_t port_id);
> +
> +int rte_kdp_start(struct rte_kdp *kdp, struct rte_mempool *pktmbuf_pool,
> + const struct rte_kdp_conf *conf);
> +
> +unsigned rte_kdp_rx_burst(struct rte_kdp *kdp,
> + struct rte_mbuf **mbufs, unsigned num);
> +
> +unsigned rte_kdp_tx_burst(struct rte_kdp *kdp,
> + struct rte_mbuf **mbufs, unsigned num);
> +
> +int rte_kdp_release(struct rte_kdp *kdp);
> +
> +void rte_kdp_close(void);
>
These functions can be static.
Thanks,
Reshma
next prev parent reply other threads:[~2016-02-09 17:33 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-01-27 16:32 [dpdk-dev] [PATCH 0/2] slow data path communication between DPDK port and Linux Ferruh Yigit
2016-01-27 16:32 ` [dpdk-dev] [PATCH 1/2] kdp: add kernel data path kernel module Ferruh Yigit
2016-02-08 17:14 ` Reshma Pattan
2016-02-09 10:53 ` Ferruh Yigit
2016-01-27 16:32 ` [dpdk-dev] [PATCH 2/2] kdp: add virtual PMD for kernel slow data path communication Ferruh Yigit
2016-01-28 8:16 ` Xu, Qian Q
2016-01-29 16:04 ` Yigit, Ferruh
2016-02-09 17:33 ` Reshma Pattan [this message]
2016-02-09 17:51 ` Ferruh Yigit
2016-02-19 5:05 ` [dpdk-dev] [PATCH v2 0/2] slow data path communication between DPDK port and Linux Ferruh Yigit
2016-02-19 5:05 ` [dpdk-dev] [PATCH v2 1/2] kdp: add kernel data path kernel module Ferruh Yigit
2016-02-19 5:05 ` [dpdk-dev] [PATCH v2 2/2] kdp: add virtual PMD for kernel slow data path communication Ferruh Yigit
2016-03-09 11:17 ` [dpdk-dev] [PATCH v3 0/2] slow data path communication between DPDK port and Linux Ferruh Yigit
2016-03-09 11:17 ` [dpdk-dev] [PATCH v3 1/2] kdp: add kernel data path kernel module Ferruh Yigit
2016-03-09 11:17 ` [dpdk-dev] [PATCH v3 2/2] kdp: add virtual PMD for kernel slow data path communication Ferruh Yigit
2016-03-14 15:32 ` [dpdk-dev] [PATCH v3 0/2] slow data path communication between DPDK port and Linux Ferruh Yigit
2016-03-16 7:26 ` Panu Matilainen
2016-03-16 8:19 ` Ferruh Yigit
2016-03-16 8:22 ` Panu Matilainen
2016-03-16 10:26 ` Ferruh Yigit
2016-03-16 10:45 ` Thomas Monjalon
2016-03-16 11:07 ` Mcnamara, John
2016-03-16 11:13 ` Ferruh Yigit
2016-03-16 13:23 ` Panu Matilainen
2016-03-16 13:15 ` Panu Matilainen
2016-03-16 13:58 ` Thomas Monjalon
2016-03-16 15:03 ` Panu Matilainen
2016-03-16 15:15 ` Thomas Monjalon
2016-03-16 11:07 ` Bruce Richardson
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