From: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
To: "Krishna Chaitanya Chundru" <krishna.chundru@oss.qualcomm.com>,
"Manivannan Sadhasivam" <mani@kernel.org>,
"Lorenzo Pieralisi" <lpieralisi@kernel.org>,
"Krzysztof Wilczyński" <kwilczynski@kernel.org>,
"Rob Herring" <robh@kernel.org>,
"Bjorn Helgaas" <bhelgaas@google.com>
Cc: linux-pci@vger.kernel.org, linux-arm-msm@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH] PCI: qcom: Disable halting feature
Date: Mon, 12 Oct 2026 09:36:04 +0200 [thread overview]
Message-ID: <22703d47-496d-475e-a09d-871c891ec51e@oss.qualcomm.com> (raw)
In-Reply-To: <20261009-halt-v1-1-4a2d7899d91f@oss.qualcomm.com>
On 10/9/26 2:55 PM, Krishna Chaitanya Chundru wrote:
> The PARF write, read and BDF halt features make the controller wait
> for earlier AXI transactions to complete before issuing new ones. This
> is needed on SoCs whose NoC cannot preserve the ordering of inbound
> transactions from the controller.
>
> On newer SoCs, the NoC preserves this ordering on its own. Halting at
> the controller adds no correctness benefit and reduces inbound DMA
> bandwidth.
Please explain what makes a SoC go into the "newer" category in this
context
Konrad
prev parent reply other threads:[~2026-10-12 7:36 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-09 12:55 Krishna Chaitanya Chundru
2026-10-12 3:37 ` Xilin Wu
2026-10-12 6:24 ` Manivannan Sadhasivam
2026-10-12 7:36 ` Konrad Dybcio [this message]
Reply instructions:
You may reply publicly 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:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=22703d47-496d-475e-a09d-871c891ec51e@oss.qualcomm.com \
--to=konrad.dybcio@oss.qualcomm.com \
--cc=bhelgaas@google.com \
--cc=krishna.chundru@oss.qualcomm.com \
--cc=kwilczynski@kernel.org \
--cc=linux-arm-msm@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-pci@vger.kernel.org \
--cc=lpieralisi@kernel.org \
--cc=mani@kernel.org \
--cc=robh@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox
all inboxes | Powered by JetHome®