From: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
To: Frank Li <Frank.Li@nxp.com>
Cc: "Rob Herring" <robh@kernel.org>,
"Saravana Kannan" <saravanak@google.com>,
"Jingoo Han" <jingoohan1@gmail.com>,
"Lorenzo Pieralisi" <lpieralisi@kernel.org>,
"Krzysztof Wilczyński" <kw@linux.com>,
"Bjorn Helgaas" <bhelgaas@google.com>,
"Richard Zhu" <hongxing.zhu@nxp.com>,
"Lucas Stach" <l.stach@pengutronix.de>,
"Shawn Guo" <shawnguo@kernel.org>,
"Sascha Hauer" <s.hauer@pengutronix.de>,
"Pengutronix Kernel Team" <kernel@pengutronix.de>,
"Fabio Estevam" <festevam@gmail.com>,
devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-pci@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
imx@lists.linux.dev
Subject: Re: [PATCH v3 1/3] of: address: Add parent_bus_addr to struct of_pci_range
Date: Thu, 3 Oct 2024 11:08:17 +0530 [thread overview]
Message-ID: <20241003053817.eycemurigrr6qy4u@thinkpad> (raw)
In-Reply-To: <20240930-pci_fixup_addr-v3-1-80ee70352fc7@nxp.com>
On Mon, Sep 30, 2024 at 02:44:53PM -0400, Frank Li wrote:
> Introduce field 'parent_bus_addr' in of_pci_range to retrieve untranslated
> CPU address information.
>
> Refer to the diagram below to understand that the bus fabric in some
> systems (like i.MX8QXP) does not use a 1:1 address map between input and
> output.
>
> Currently, many drivers use .cpu_addr_fixup() callback hardcodes that
s/drivers/controller drivers/
> translation in the code, e.g., "cpu_addr & CDNS_PLAT_CPU_TO_BUS_ADDR",
> "cpu_addr + BUS_IATU_OFFSET", etc, even though those translations *should*
> be described via DT.
>
It'd be useful to mention which driver has the mentioned fixup as an example.
- Mani
--
மணிவண்ணன் சதாசிவம்
next prev parent reply other threads:[~2024-10-03 5:38 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-09-30 18:44 [PATCH v3 0/3] PCI: dwc: opitimaze RC host pci_fixup_addr() Frank Li
2024-09-30 18:44 ` [PATCH v3 1/3] of: address: Add parent_bus_addr to struct of_pci_range Frank Li
2024-10-03 5:38 ` Manivannan Sadhasivam [this message]
2024-09-30 18:44 ` [PATCH v3 2/3] PCI: dwc: Using parent_bus_addr in of_range to eliminate cpu_addr_fixup() Frank Li
2024-10-03 5:51 ` Manivannan Sadhasivam
2024-10-03 19:30 ` [PATCH v3 2/3] PCI: dwc: Using parent_bus_addr in of_range to eliminate cpu_addr_fixup()y Frank Li
2024-09-30 18:44 ` [PATCH v3 3/3] PCI: imx6: Remove cpu_addr_fixup() Frank Li
2024-10-03 5:34 ` [PATCH v3 0/3] PCI: dwc: opitimaze RC host pci_fixup_addr() Manivannan Sadhasivam
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