DPDK-dev Archive on lore.kernel.org
 help / color / Atom feed
* [dpdk-dev]  [PATCH] doc: update Marvell OCTEON TX2 LBK support
@ 2019-07-17 15:55 jerinj
  2019-07-18 22:09 ` Thomas Monjalon
  0 siblings, 1 reply; 2+ messages in thread
From: jerinj @ 2019-07-17 15:55 UTC (permalink / raw)
  To: dev, Jerin Jacob, Nithin Dabilpuram, Vamsi Attunuru,
	John McNamara, Marko Kovacevic
  Cc: thomas

From: Jerin Jacob <jerinj@marvell.com>

Add LBK HW block abstraction details and the application
usage models.

This patch also updates missing DPI HW block to DPDK
subsystem mapping as well.

Signed-off-by: Jerin Jacob <jerinj@marvell.com>
---
 doc/guides/platform/octeontx2.rst | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/doc/guides/platform/octeontx2.rst b/doc/guides/platform/octeontx2.rst
index f5be973a5..4194a4358 100644
--- a/doc/guides/platform/octeontx2.rst
+++ b/doc/guides/platform/octeontx2.rst
@@ -61,6 +61,10 @@ DPDK subsystem.
    +---+-----+--------------------------------------------------------------+
    | 6 | TIM | rte_event_timer_adapter                                      |
    +---+-----+--------------------------------------------------------------+
+   | 7 | LBK | rte_ethdev                                                   |
+   +---+-----+--------------------------------------------------------------+
+   | 8 | DPI | rte_rawdev                                                   |
+   +---+-----+--------------------------------------------------------------+
 
 PF0 is called the administrative / admin function (AF) and has exclusive
 privileges to provision RVU functional block's LFs to each of the PF/VF.
@@ -82,6 +86,23 @@ resource provisioning example where,
 2. PFx-VF1 ethdev driver bound to the first DPDK application.
 3. PFy ethdev driver, PFy-VF0 ethdev driver, PFz eventdev driver, PFm-VF0 cryptodev driver bound to the second DPDK application.
 
+LBK HW Access
+-------------
+
+Loopback HW Unit (LBK) receives packets from NIX-RX and sends packets back to NIX-TX.
+The loopback block has N channels and contains data buffering that is shared across
+all channels. The LBK HW Unit is abstracted using ethdev subsystem, Where PF0's
+VFs are exposed as ethdev device and odd-even pairs of VFs are tied together,
+that is, packets sent on odd VF end up received on even VF and vice versa.
+This would enable HW accelerated means of communication between two domains
+where even VF bound to the first domain and odd VF bound to the second domain.
+
+Typical application usage models are,
+
+#. Communication between the Linux kernel and DPDK application.
+#. Exception path to Linux kernel from DPDK application as SW ``KNI`` replacement.
+#. Communication between two different DPDK applications.
+
 OCTEON TX2 packet flow
 ----------------------
 
-- 
2.22.0


^ permalink raw reply	[flat|nested] 2+ messages in thread

* Re: [dpdk-dev] [PATCH] doc: update Marvell OCTEON TX2 LBK support
  2019-07-17 15:55 [dpdk-dev] [PATCH] doc: update Marvell OCTEON TX2 LBK support jerinj
@ 2019-07-18 22:09 ` Thomas Monjalon
  0 siblings, 0 replies; 2+ messages in thread
From: Thomas Monjalon @ 2019-07-18 22:09 UTC (permalink / raw)
  To: jerinj
  Cc: dev, Nithin Dabilpuram, Vamsi Attunuru, John McNamara, Marko Kovacevic

17/07/2019 17:55, jerinj@marvell.com:
> From: Jerin Jacob <jerinj@marvell.com>
> 
> Add LBK HW block abstraction details and the application
> usage models.
> 
> This patch also updates missing DPI HW block to DPDK
> subsystem mapping as well.
> 
> Signed-off-by: Jerin Jacob <jerinj@marvell.com>

Applied, thanks




^ permalink raw reply	[flat|nested] 2+ messages in thread

end of thread, back to index

Thread overview: 2+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2019-07-17 15:55 [dpdk-dev] [PATCH] doc: update Marvell OCTEON TX2 LBK support jerinj
2019-07-18 22:09 ` Thomas Monjalon

DPDK-dev Archive on lore.kernel.org

Archives are clonable:
	git clone --mirror https://lore.kernel.org/dpdk-dev/0 dpdk-dev/git/0.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 dpdk-dev dpdk-dev/ https://lore.kernel.org/dpdk-dev \
		dev@dpdk.org dpdk-dev@archiver.kernel.org
	public-inbox-index dpdk-dev


Newsgroup available over NNTP:
	nntp://nntp.lore.kernel.org/org.dpdk.dev


AGPL code for this site: git clone https://public-inbox.org/ public-inbox