From: Rob Herring <robh+dt@kernel.org> To: Robin Murphy <robin.murphy@arm.com> Cc: Joerg Roedel <joro@8bytes.org>, Christoph Hellwig <hch@lst.de>, Vineet Gupta <vgupta@kernel.org>, Russell King <linux@armlinux.org.uk>, Catalin Marinas <catalin.marinas@arm.com>, Will Deacon <will@kernel.org>, Huacai Chen <chenhuacai@kernel.org>, WANG Xuerui <kernel@xen0n.name>, Thomas Bogendoerfer <tsbogend@alpha.franken.de>, Paul Walmsley <paul.walmsley@sifive.com>, Palmer Dabbelt <palmer@dabbelt.com>, Albert Ou <aou@eecs.berkeley.edu>, Lorenzo Pieralisi <lpieralisi@kernel.org>, Hanjun Guo <guohanjun@huawei.com>, Sudeep Holla <sudeep.holla@arm.com>, "K. Y. Srinivasan" <kys@microsoft.com>, Haiyang Zhang <haiyangz@microsoft.com>, Wei Liu <wei.liu@kernel.org>, Dexuan Cui <decui@microsoft.com>, Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>, David Woodhouse <dwmw2@infradead.org>, Lu Baolu <baolu.lu@linux.intel.com>, Niklas Schnelle <schnelle@linux.ibm.com>, Matthew Rosato <mjrosato@linux.ibm.com>, Gerald Schaefer <gerald.schaefer@linux.ibm.com>, Jean-Philippe Brucker <jean-philippe@linaro.org>, Frank Rowand <frowand.list@gmail.com>, Marek Szyprowski <m.szyprowski@samsung.com>, Jason Gunthorpe <jgg@ziepe.ca>, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-acpi@vger.kernel.org, iommu@lists.linux.dev, devicetree@vger.kernel.org Subject: Re: [PATCH 1/7] OF: Retire dma-ranges mask workaround Date: Thu, 30 Nov 2023 08:46:36 -0600 [thread overview] Message-ID: <CAL_JsqK_StOWTOBCR6OaAqu63_kyVKsA46qJ4ky9iSyB-yKZ2g@mail.gmail.com> (raw) In-Reply-To: <950378c6f39270a255452733ff2305e56fb05cc5.1701268753.git.robin.murphy@arm.com> On Wed, Nov 29, 2023 at 11:43 AM Robin Murphy <robin.murphy@arm.com> wrote: > > From what I remember, the fixup adding 1 to the dma-ranges size was for > the benefit of some early AMD Seattle DTs. Those are likely extinct by > now, and anyone else who might have deserved to get the message has > hopefully seen the warning in the 9 years we've had it there. The modern > dma_range_map mechanism should happily handle odd-sized ranges with no > ill effect, so there's little need to care anyway now. Clean it up. The commit has a tested by for Seattle, but the series adding this was for an issue on TI Keystone[1]. Looks like the patch adding this fixup and warning did 2 things. It added 1 to the default mask when 'dma-ranges' was not present (which keystone needed) and added 1 if the DT value was a mask along with the warning. It's not clear what Seattle needed, but there was a fix to dma-ranges about a year later[2]. I thought at some point we allowed 32-bit DTs to specify a ~0 size to avoid having to use 2 cells to express 4G size which wouldn't have been a warning, but I can't find any discussion on that. It would have been earlier than 2015 I think... Anyways, there is no upstream dts with that either, so I think we're good. > Signed-off-by: Robin Murphy <robin.murphy@arm.com> > --- > drivers/of/device.c | 16 ---------------- > 1 file changed, 16 deletions(-) Acked-by: Rob Herring <robh@kernel.org> [1] https://lore.kernel.org/all/1425405134-24707-1-git-send-email-m-karicheri2@ti.com/ [2] https://lore.kernel.org/all/1455162671-16044-4-git-send-email-Suravee.Suthikulpanit@amd.com/
WARNING: multiple messages have this Message-ID (diff)
From: Rob Herring <robh+dt@kernel.org> To: Robin Murphy <robin.murphy@arm.com> Cc: Joerg Roedel <joro@8bytes.org>, Christoph Hellwig <hch@lst.de>, Vineet Gupta <vgupta@kernel.org>, Russell King <linux@armlinux.org.uk>, Catalin Marinas <catalin.marinas@arm.com>, Will Deacon <will@kernel.org>, Huacai Chen <chenhuacai@kernel.org>, WANG Xuerui <kernel@xen0n.name>, Thomas Bogendoerfer <tsbogend@alpha.franken.de>, Paul Walmsley <paul.walmsley@sifive.com>, Palmer Dabbelt <palmer@dabbelt.com>, Albert Ou <aou@eecs.berkeley.edu>, Lorenzo Pieralisi <lpieralisi@kernel.org>, Hanjun Guo <guohanjun@huawei.com>, Sudeep Holla <sudeep.holla@arm.com>, "K. Y. Srinivasan" <kys@microsoft.com>, Haiyang Zhang <haiyangz@microsoft.com>, Wei Liu <wei.liu@kernel.org>, Dexuan Cui <decui@microsoft.com>, Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>, David Woodhouse <dwmw2@infradead.org>, Lu Baolu <baolu.lu@linux.intel.com>, Niklas Schnelle <schnelle@linux.ibm.com>, Matthew Rosato <mjrosato@linux.ibm.com>, Gerald Schaefer <gerald.schaefer@linux.ibm.com>, Jean-Philippe Brucker <jean-philippe@linaro.org>, Frank Rowand <frowand.list@gmail.com>, Marek Szyprowski <m.szyprowski@samsung.com>, Jason Gunthorpe <jgg@ziepe.ca>, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-acpi@vger.kernel.org, iommu@lists.linux.dev, devicetree@vger.kernel.org Subject: Re: [PATCH 1/7] OF: Retire dma-ranges mask workaround Date: Thu, 30 Nov 2023 08:46:36 -0600 [thread overview] Message-ID: <CAL_JsqK_StOWTOBCR6OaAqu63_kyVKsA46qJ4ky9iSyB-yKZ2g@mail.gmail.com> (raw) In-Reply-To: <950378c6f39270a255452733ff2305e56fb05cc5.1701268753.git.robin.murphy@arm.com> On Wed, Nov 29, 2023 at 11:43 AM Robin Murphy <robin.murphy@arm.com> wrote: > > From what I remember, the fixup adding 1 to the dma-ranges size was for > the benefit of some early AMD Seattle DTs. Those are likely extinct by > now, and anyone else who might have deserved to get the message has > hopefully seen the warning in the 9 years we've had it there. The modern > dma_range_map mechanism should happily handle odd-sized ranges with no > ill effect, so there's little need to care anyway now. Clean it up. The commit has a tested by for Seattle, but the series adding this was for an issue on TI Keystone[1]. Looks like the patch adding this fixup and warning did 2 things. It added 1 to the default mask when 'dma-ranges' was not present (which keystone needed) and added 1 if the DT value was a mask along with the warning. It's not clear what Seattle needed, but there was a fix to dma-ranges about a year later[2]. I thought at some point we allowed 32-bit DTs to specify a ~0 size to avoid having to use 2 cells to express 4G size which wouldn't have been a warning, but I can't find any discussion on that. It would have been earlier than 2015 I think... Anyways, there is no upstream dts with that either, so I think we're good. > Signed-off-by: Robin Murphy <robin.murphy@arm.com> > --- > drivers/of/device.c | 16 ---------------- > 1 file changed, 16 deletions(-) Acked-by: Rob Herring <robh@kernel.org> [1] https://lore.kernel.org/all/1425405134-24707-1-git-send-email-m-karicheri2@ti.com/ [2] https://lore.kernel.org/all/1455162671-16044-4-git-send-email-Suravee.Suthikulpanit@amd.com/ _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2023-11-30 14:47 UTC|newest] Thread overview: 61+ messages / expand[flat|nested] mbox.gz Atom feed top 2023-11-29 17:42 [PATCH 0/7] dma-mapping: Clean up arch_setup_dma_ops() Robin Murphy 2023-11-29 17:42 ` Robin Murphy 2023-11-29 17:42 ` [PATCH 1/7] OF: Retire dma-ranges mask workaround Robin Murphy 2023-11-29 17:42 ` Robin Murphy 2023-11-30 14:46 ` Rob Herring [this message] 2023-11-30 14:46 ` Rob Herring 2023-11-29 17:42 ` [PATCH 2/7] OF: Simplify DMA range calculations Robin Murphy 2023-11-29 17:42 ` Robin Murphy 2023-11-30 0:46 ` Jason Gunthorpe 2023-11-30 0:46 ` Jason Gunthorpe 2023-11-30 14:56 ` Rob Herring 2023-11-30 14:56 ` Rob Herring 2023-11-29 17:43 ` [PATCH 3/7] ACPI/IORT: Handle memory address size limits as limits Robin Murphy 2023-11-29 17:43 ` Robin Murphy 2023-11-30 0:39 ` Jason Gunthorpe 2023-11-30 0:39 ` Jason Gunthorpe 2023-12-11 13:27 ` Will Deacon 2023-12-11 13:27 ` Will Deacon 2023-12-11 15:01 ` Robin Murphy 2023-12-11 15:01 ` Robin Murphy 2023-12-11 15:30 ` Will Deacon 2023-12-11 15:30 ` Will Deacon 2023-12-11 15:36 ` Jason Gunthorpe 2023-12-11 15:36 ` Jason Gunthorpe 2023-12-11 15:37 ` Robin Murphy 2023-12-11 15:37 ` Robin Murphy 2023-12-11 15:39 ` Mark Rutland 2023-12-11 15:39 ` Mark Rutland 2023-12-11 16:13 ` Robin Murphy 2023-12-11 16:13 ` Robin Murphy 2023-12-11 15:37 ` Mark Rutland 2023-12-11 15:37 ` Mark Rutland 2023-11-29 17:43 ` [PATCH 4/7] dma-mapping: Add helpers for dma_range_map bounds Robin Murphy 2023-11-29 17:43 ` Robin Murphy 2023-11-29 20:40 ` Jason Gunthorpe 2023-11-29 20:40 ` Jason Gunthorpe 2023-11-30 6:11 ` kernel test robot 2023-11-30 6:11 ` kernel test robot 2023-12-04 8:43 ` Christoph Hellwig 2023-12-04 8:43 ` Christoph Hellwig 2023-11-29 17:43 ` [PATCH 5/7] iommu/dma: Make limit checks self-contained Robin Murphy 2023-11-29 17:43 ` Robin Murphy 2023-11-29 20:43 ` Jason Gunthorpe 2023-11-29 20:43 ` Jason Gunthorpe 2023-11-29 17:43 ` [PATCH 6/7] iommu/dma: Centralise iommu_setup_dma_ops() Robin Murphy 2023-11-29 17:43 ` Robin Murphy 2023-11-29 20:50 ` Jason Gunthorpe 2023-11-29 20:50 ` Jason Gunthorpe 2023-11-29 17:43 ` [PATCH 7/7] dma-mapping: Simplify arch_setup_dma_ops() Robin Murphy 2023-11-29 17:43 ` Robin Murphy 2023-11-30 5:23 ` kernel test robot 2023-12-04 8:44 ` Christoph Hellwig 2023-12-04 8:44 ` Christoph Hellwig 2023-12-04 12:54 ` Robin Murphy 2023-12-04 12:54 ` Robin Murphy 2023-11-29 20:36 ` [PATCH 0/7] dma-mapping: Clean up arch_setup_dma_ops() Jason Gunthorpe 2023-11-29 20:36 ` Jason Gunthorpe 2023-12-01 13:07 ` Robin Murphy 2023-12-01 13:07 ` Robin Murphy 2023-12-01 13:57 ` Jason Gunthorpe 2023-12-01 13:57 ` Jason Gunthorpe
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=CAL_JsqK_StOWTOBCR6OaAqu63_kyVKsA46qJ4ky9iSyB-yKZ2g@mail.gmail.com \ --to=robh+dt@kernel.org \ --cc=aou@eecs.berkeley.edu \ --cc=baolu.lu@linux.intel.com \ --cc=catalin.marinas@arm.com \ --cc=chenhuacai@kernel.org \ --cc=decui@microsoft.com \ --cc=devicetree@vger.kernel.org \ --cc=dwmw2@infradead.org \ --cc=frowand.list@gmail.com \ --cc=gerald.schaefer@linux.ibm.com \ --cc=guohanjun@huawei.com \ --cc=haiyangz@microsoft.com \ --cc=hch@lst.de \ --cc=iommu@lists.linux.dev \ --cc=jean-philippe@linaro.org \ --cc=jgg@ziepe.ca \ --cc=joro@8bytes.org \ --cc=kernel@xen0n.name \ --cc=kys@microsoft.com \ --cc=linux-acpi@vger.kernel.org \ --cc=linux-arm-kernel@lists.infradead.org \ --cc=linux-kernel@vger.kernel.org \ --cc=linux@armlinux.org.uk \ --cc=lpieralisi@kernel.org \ --cc=m.szyprowski@samsung.com \ --cc=mjrosato@linux.ibm.com \ --cc=palmer@dabbelt.com \ --cc=paul.walmsley@sifive.com \ --cc=robin.murphy@arm.com \ --cc=schnelle@linux.ibm.com \ --cc=sudeep.holla@arm.com \ --cc=suravee.suthikulpanit@amd.com \ --cc=tsbogend@alpha.franken.de \ --cc=vgupta@kernel.org \ --cc=wei.liu@kernel.org \ --cc=will@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: linkBe sure your reply has a Subject: header at the top and a blank line before the message body.
This is an external index of several public inboxes, see mirroring instructions on how to clone and mirror all data and code used by this external index.