Linux-PCI Archive on
 help / color / Atom feed
From: "Lad, Prabhakar" <>
To: Kishon Vijay Abraham I <>
Subject: Re: [Query] : PCIe - Endpoint Function
Date: Fri, 11 Oct 2019 08:35:07 +0100
Message-ID: <> (raw)
In-Reply-To: <>

Hi Kishon,

On Thu, Oct 10, 2019 at 12:32 PM Kishon Vijay Abraham I <> wrote:
> Hi Prabhakar,
> On 10/10/19 4:57 PM, Lad, Prabhakar wrote:
> > Hello,
> >
> > I am currently working on adding pcie-endpoint support for a
> > controller, this controller doesn't support outbound- inbound address
> > translations, it has 1-1 mapping between the CPU and PCI addresses,
> > the current endpoint framework is based on  outbound-inbound
> > translations, what is the best approach to add this support, or is
> > there any WIP already for it ?
> How will the endpoint access host buffer without outbound ATU? I assume the PCI
> address reserved for endpoint is not the full 32-bit or 64-bit address space?
> In that case, the endpoint cannot directly access the host buffer (unless the
> host already knows the address space of the endpoint and gives the endpoint an
> address in its OB address space).
for the address translation to happen on the endpoint I have to
program the local cpu address prior to start of link,
Yes the host somehow has to know the address space of endpoint and
pass it to the endpoint.

--Prabhakar Lad

  reply index

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-10-10 11:27 Lad, Prabhakar
2019-10-10 11:32 ` Kishon Vijay Abraham I
2019-10-11  7:35   ` Lad, Prabhakar [this message]
2019-10-11 13:37     ` Lad, Prabhakar
2019-10-15  7:52       ` Kishon Vijay Abraham I

Reply instructions:

You may reply publically to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to='' \ \ \ \

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

Linux-PCI Archive on

Archives are clonable:
	git clone --mirror linux-pci/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 linux-pci linux-pci/ \
	public-inbox-index linux-pci

Example config snippet for mirrors

Newsgroup available over NNTP:

AGPL code for this site: git clone public-inbox