From: "Théo Lebrun" <theo.lebrun@bootlin.com>
To: "Jiaxun Yang" <jiaxun.yang@flygoat.com>,
"Andrew Lunn" <andrew+netdev@lunn.ch>,
"David S . Miller" <davem@davemloft.net>,
"Eric Dumazet" <edumazet@google.com>,
"Jakub Kicinski" <kuba@kernel.org>,
"Paolo Abeni" <pabeni@redhat.com>,
"Rob Herring" <robh@kernel.org>,
"Krzysztof Kozlowski" <krzk+dt@kernel.org>,
"Conor Dooley" <conor+dt@kernel.org>,
"Nicolas Ferre" <nicolas.ferre@microchip.com>,
"Claudiu Beznea" <claudiu.beznea@tuxon.dev>,
"Paul Walmsley" <paul.walmsley@sifive.com>,
"Palmer Dabbelt" <palmer@dabbelt.com>,
"Albert Ou" <aou@eecs.berkeley.edu>,
"Alexandre Ghiti" <alex@ghiti.fr>,
"Samuel Holland" <samuel.holland@sifive.com>,
"Richard Cochran" <richardcochran@gmail.com>,
"Russell King" <linux@armlinux.org.uk>,
"Thomas Bogendoerfer" <tsbogend@alpha.franken.de>,
"Vladimir Kondratiev" <vladimir.kondratiev@mobileye.com>,
"Gregory CLEMENT" <gregory.clement@bootlin.com>,
"Cyrille Pitchen" <cyrille.pitchen@atmel.com>,
"Harini Katakam" <harini.katakam@xilinx.com>,
"Rafal Ozieblo" <rafalo@cadence.com>,
"Haavard Skinnemoen" <hskinnemoen@atmel.com>
Cc: <netdev@vger.kernel.org>, <devicetree@vger.kernel.org>,
<linux-kernel@vger.kernel.org>, <linux-riscv@lists.infradead.org>,
"linux-mips@vger.kernel.org" <linux-mips@vger.kernel.org>,
"Thomas Petazzoni" <thomas.petazzoni@bootlin.com>,
"Tawfik Bayouk" <tawfik.bayouk@mobileye.com>
Subject: Re: [PATCH net-next v2 16/18] MIPS: mobileye: add EyeQ5 DMA IOCU support
Date: Thu, 07 Aug 2025 18:11:23 +0200 [thread overview]
Message-ID: <DBWBSL7Q35M2.2WWW5HKBHKUA5@bootlin.com> (raw)
In-Reply-To: <984c1bea-7020-4121-9fea-7d657a5e8da1@app.fastmail.com>
Hello Jiaxun,
On Mon Jun 30, 2025 at 3:35 PM CEST, Jiaxun Yang wrote:
> 在2025年6月27日周五 上午10:09，Théo Lebrun写道：
>> Both Cadence GEM Ethernet controllers on EyeQ5 are hardwired through CM3
>> IO Coherency Units (IOCU). For DMA coherent accesses, BIT(36) must be
>> set in DMA addresses.
>
> Just quick question, it seems like this special driver is only applying a
> fixed offset (1 << 36) to the DMA physical address, can we achieve that with dma-ranges
> property in DeviceTree?
>
> I belive:
> ```
> dma-coherent;
> # Bus addr # Phys # Size
> dma-ranges = <0x10 0x00000000 0x0 0x0 0x10 0>;
> ```
>
> Will do the job.
This is perfect! Can confirm it works just fine. When you are stuck in
an issue for too long you don't think about broadening your viewpoint.
Thanks,
--
Théo Lebrun, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com
next prev parent reply other threads:[~2025-08-07 16:11 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-06-27 9:08 [PATCH net-next v2 00/18] Support the Cadence MACB/GEM instances on Mobileye EyeQ5 SoCs Théo Lebrun
2025-06-27 9:08 ` [PATCH net-next v2 01/18] dt-bindings: net: cdns,macb: sort compatibles Théo Lebrun
2025-07-01 8:16 ` Krzysztof Kozlowski
2025-06-27 9:08 ` [PATCH net-next v2 02/18] dt-bindings: net: cdns,macb: add Mobileye EyeQ5 ethernet interface Théo Lebrun
2025-07-01 8:18 ` Krzysztof Kozlowski
2025-06-27 9:08 ` [PATCH net-next v2 03/18] dt-bindings: net: cdns,macb: allow tsu_clk without tx_clk Théo Lebrun
2025-07-01 8:19 ` Krzysztof Kozlowski
2025-06-27 9:08 ` [PATCH net-next v2 04/18] dt-bindings: net: cdns,macb: allow dma-coherent Théo Lebrun
2025-06-27 9:08 ` [PATCH net-next v2 05/18] net: macb: use BIT() macro for capability definitions Théo Lebrun
2025-07-01 15:35 ` Sean Anderson
2025-06-27 9:08 ` [PATCH net-next v2 06/18] net: macb: Remove local variables clk_init and init in macb_probe() Théo Lebrun
2025-07-01 15:35 ` Sean Anderson
2025-06-27 9:08 ` [PATCH net-next v2 07/18] net: macb: drop macb_config NULL checking Théo Lebrun
2025-07-01 15:37 ` Sean Anderson
2025-06-27 9:08 ` [PATCH net-next v2 08/18] net: macb: introduce DMA descriptor helpers (is 64bit? is PTP?) Théo Lebrun
2025-07-01 15:56 ` Sean Anderson
2025-06-27 9:08 ` [PATCH net-next v2 09/18] net: macb: sort #includes Théo Lebrun
2025-07-01 15:58 ` Sean Anderson
2025-06-27 9:08 ` [PATCH net-next v2 10/18] net: macb: remove illusion about TBQPH/RBQPH being per-queue Théo Lebrun
2025-07-01 16:15 ` Sean Anderson
2025-07-01 16:20 ` Sean Anderson
2025-06-27 9:08 ` [PATCH net-next v2 11/18] net: macb: single dma_alloc_coherent() for DMA descriptors Théo Lebrun
2025-07-01 16:32 ` Sean Anderson
2025-08-07 14:48 ` Théo Lebrun
2025-06-27 9:08 ` [PATCH net-next v2 12/18] net: macb: match skb_reserve(skb, NET_IP_ALIGN) with HW alignment Théo Lebrun
2025-07-01 16:40 ` Sean Anderson
2025-08-07 15:24 ` Théo Lebrun
2025-08-11 18:53 ` Sean Anderson
2025-06-27 9:08 ` [PATCH net-next v2 13/18] net: macb: avoid double endianness swap in macb_set_hwaddr() Théo Lebrun
2025-07-01 16:44 ` Sean Anderson
2025-06-27 9:09 ` [PATCH net-next v2 14/18] net: macb: add no LSO capability (MACB_CAPS_NO_LSO) Théo Lebrun
2025-07-01 16:51 ` Sean Anderson
2025-06-27 9:09 ` [PATCH net-next v2 15/18] net: macb: Add "mobileye,eyeq5-gem" compatible Théo Lebrun
2025-07-01 16:51 ` Sean Anderson
2025-06-27 9:09 ` [PATCH net-next v2 16/18] MIPS: mobileye: add EyeQ5 DMA IOCU support Théo Lebrun
2025-06-27 19:15 ` Simon Horman
2025-06-30 13:35 ` Jiaxun Yang
2025-08-07 16:11 ` Théo Lebrun [this message]
2025-06-27 9:09 ` [PATCH net-next v2 17/18] MIPS: mobileye: eyeq5: add two Cadence GEM Ethernet controllers Théo Lebrun
2025-06-27 9:09 ` [PATCH net-next v2 18/18] MIPS: mobileye: eyeq5-epm: add two Cadence GEM Ethernet PHYs Théo Lebrun
2025-06-27 9:41 ` [PATCH net-next v2 00/18] Support the Cadence MACB/GEM instances on Mobileye EyeQ5 SoCs Maxime Chevallier
2025-07-01 16:53 ` Sean Anderson
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