From: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
To: Christoph Hellwig <hch@lst.de>
Cc: Rich Felker <dalias@libc.org>,
"open list:SUPERH" <linux-sh@vger.kernel.org>,
David Airlie <airlied@linux.ie>,
"open list:PCI NATIVE HOST BRIDGE AND ENDPOINT DRIVERS"
<linux-pci@vger.kernel.org>, Hanjun Guo <guohanjun@huawei.com>,
"open list:REMOTE PROCESSOR REMOTEPROC SUBSYSTEM"
<linux-remoteproc@vger.kernel.org>,
"open list:DRM DRIVERS FOR ALLWINNER A10"
<dri-devel@lists.freedesktop.org>,
Julien Grall <julien.grall@arm.com>,
"H. Peter Anvin" <hpa@zytor.com>, Will Deacon <will@kernel.org>,
Dan Williams <dan.j.williams@intel.com>,
"open list:STAGING SUBSYSTEM" <devel@driverdev.osuosl.org>,
Jean-Philippe Brucker <jean-philippe@linaro.org>,
Florian Fainelli <f.fainelli@gmail.com>,
Yoshinori Sato <ysato@users.sourceforge.jp>,
Bartosz Golaszewski <bgolaszewski@baylibre.com>,
Frank Rowand <frowand.list@gmail.com>,
"maintainer:X86 ARCHITECTURE 32-BIT AND 64-BIT" <x86@kernel.org>,
Russell King <linux@armlinux.org.uk>,
"open list:ACPI FOR ARM64 ACPI/arm64"
<linux-acpi@vger.kernel.org>, Chen-Yu Tsai <wens@csie.org>,
Ingo Molnar <mingo@redhat.com>,
"maintainer:BROADCOM BCM7XXX ARM ARCHITECTURE"
<bcm-kernel-feedback-list@broadcom.com>,
Alan Stern <stern@rowland.harvard.edu>,
Len Brown <lenb@kernel.org>, Ohad Ben-Cohen <ohad@wizery.com>,
"open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE"
<devicetree@vger.kernel.org>, Daniel Vetter <daniel@ffwll.ch>,
Mauro Carvalho Chehab <mchehab@kernel.org>,
Maxime Ripard <mripard@kernel.org>,
Rob Herring <robh+dt@kernel.org>, Borislav Petkov <bp@alien8.de>,
Yong Deng <yong.deng@magewell.com>,
Santosh Shilimkar <ssantosh@kernel.org>,
Bjorn Helgaas <bhelgaas@google.com>,
Nathan Chancellor <natechancellor@gmail.com>,
Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
"moderated list:ARM PORT" <linux-arm-kernel@lists.infradead.org>,
Felipe Balbi <balbi@kernel.org>,
Saravana Kannan <saravanak@google.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
"open list:USB SUBSYSTEM" <linux-usb@vger.kernel.org>,
"Rafael J. Wysocki" <rjw@rjwysocki.net>,
open list <linux-kernel@vger.kernel.org>,
Paul Kocialkowski <paul.kocialkowski@bootlin.com>,
"open list:IOMMU DRIVERS" <iommu@lists.linux-foundation.org>,
Thomas Gleixner <tglx@linutronix.de>,
Stefano Stabellini <sstabellini@kernel.org>,
Jim Quinlan <james.quinlan@broadcom.com>,
Sudeep Holla <sudeep.holla@arm.com>,
"open list:ALLWINNER A10 CSI DRIVER"
<linux-media@vger.kernel.org>,
Robin Murphy <robin.murphy@arm.com>
Subject: Re: [PATCH v11 07/11] device-mapping: Introduce DMA range map, supplanting dma_pfn_offset
Date: Tue, 08 Sep 2020 13:20:56 +0200 [thread overview]
Message-ID: <e4c672bc5237f6efb415efb77353b018d191b5ae.camel@suse.de> (raw)
In-Reply-To: <20200908094345.GA20959@lst.de>
[-- Attachment #1.1: Type: text/plain, Size: 1787 bytes --]
On Tue, 2020-09-08 at 11:43 +0200, Christoph Hellwig wrote:
> And because I like replying to myself so much, here is a link to the
> version with the arm cleanup patch applied. Unlike the previous two
> attempts this has at least survived very basic sanity testing:
>
> http://git.infradead.org/users/hch/misc.git/shortlog/refs/heads/dma-ranges.2
>
> Note that we'll still need to sort out the arm/keystone warnings from
> the original patch. Do we have anyone on the CC list who knows that
> platform a little better to figure out if the ifdef solution would work?
Had to do the following to boot without errors:
diff --git a/include/linux/dma-direct.h b/include/linux/dma-direct.h
index ef61a33c47bc..7dd88a0b6d0b 100644
--- a/include/linux/dma-direct.h
+++ b/include/linux/dma-direct.h
@@ -97,6 +97,9 @@ static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size,
{
dma_addr_t end = addr + size - 1;
+ if (addr == DMA_MAPPING_ERROR)
+ return false;
+
if (!dev->dma_mask)
return false;
diff --git a/kernel/dma/direct.c b/kernel/dma/direct.c
index 90f1ecb6baaf..25809703a5bf 100644
--- a/kernel/dma/direct.c
+++ b/kernel/dma/direct.c
@@ -71,7 +71,12 @@ static gfp_t dma_direct_optimal_gfp_mask(struct device *dev, u64 dma_mask,
static bool dma_coherent_ok(struct device *dev, phys_addr_t phys, size_t size)
{
- return phys_to_dma_direct(dev, phys) + size - 1 <=
+ dma_addr_t dma_addr = phys_to_dma_direct(dev, phys);
+
+ if (dma_addr == DMA_MAPPING_ERROR)
+ return false;
+
+ return dma_addr + size - 1 <=
min_not_zero(dev->coherent_dma_mask, dev->bus_dma_limit);
}
Regards,
Nicolas
[-- Attachment #1.2: This is a digitally signed message part --]
[-- Type: application/pgp-signature, Size: 488 bytes --]
[-- Attachment #2: Type: text/plain, Size: 156 bytes --]
_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu
next prev parent reply other threads:[~2020-09-08 11:21 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-24 19:30 [PATCH v11 00/11] PCI: brcmstb: enable PCIe for STB chips Jim Quinlan via iommu
2020-08-24 19:30 ` [PATCH v11 07/11] device-mapping: Introduce DMA range map, supplanting dma_pfn_offset Jim Quinlan via iommu
2020-08-25 9:45 ` Andy Shevchenko
2020-08-25 15:37 ` Jim Quinlan via iommu
2020-09-01 8:24 ` Christoph Hellwig
2020-09-02 15:02 ` Jim Quinlan via iommu
2020-09-03 16:06 ` Christoph Hellwig
2020-09-07 15:18 ` Nicolas Saenz Julienne
2020-09-08 6:54 ` Christoph Hellwig
2020-09-02 21:53 ` Nathan Chancellor
2020-09-02 22:11 ` Jim Quinlan via iommu
2020-09-02 22:38 ` Nathan Chancellor
2020-09-03 0:36 ` Florian Fainelli
2020-09-03 0:52 ` Nathan Chancellor
2020-09-03 17:32 ` Jim Quinlan via iommu
2020-09-07 15:01 ` Nicolas Saenz Julienne
2020-09-07 17:40 ` Jim Quinlan via iommu
2020-09-07 18:19 ` Nicolas Saenz Julienne
2020-09-08 6:59 ` Christoph Hellwig
2020-09-08 7:29 ` Christoph Hellwig
2020-09-08 7:32 ` Christoph Hellwig
2020-09-08 9:43 ` Christoph Hellwig
2020-09-08 11:20 ` Nicolas Saenz Julienne [this message]
2020-09-08 12:41 ` Christoph Hellwig
2020-09-08 15:59 ` Jim Quinlan via iommu
2020-09-09 6:21 ` Nathan Chancellor
2020-09-08 6:58 ` Christoph Hellwig
2020-08-25 17:40 ` [PATCH v11 00/11] PCI: brcmstb: enable PCIe for STB chips Florian Fainelli
2020-08-27 6:35 ` Christoph Hellwig
2020-08-27 13:29 ` Jim Quinlan via iommu
2020-09-07 9:16 ` Lorenzo Pieralisi
2020-09-07 17:43 ` Jim Quinlan via iommu
2020-09-07 18:29 ` Florian Fainelli
2020-09-08 10:42 ` Lorenzo Pieralisi
2020-09-08 12:20 ` Christoph Hellwig
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=e4c672bc5237f6efb415efb77353b018d191b5ae.camel@suse.de \
--to=nsaenzjulienne@suse.de \
--cc=airlied@linux.ie \
--cc=andriy.shevchenko@linux.intel.com \
--cc=balbi@kernel.org \
--cc=bcm-kernel-feedback-list@broadcom.com \
--cc=bgolaszewski@baylibre.com \
--cc=bhelgaas@google.com \
--cc=bp@alien8.de \
--cc=dalias@libc.org \
--cc=dan.j.williams@intel.com \
--cc=daniel@ffwll.ch \
--cc=devel@driverdev.osuosl.org \
--cc=devicetree@vger.kernel.org \
--cc=dri-devel@lists.freedesktop.org \
--cc=f.fainelli@gmail.com \
--cc=frowand.list@gmail.com \
--cc=gregkh@linuxfoundation.org \
--cc=guohanjun@huawei.com \
--cc=hch@lst.de \
--cc=hpa@zytor.com \
--cc=iommu@lists.linux-foundation.org \
--cc=james.quinlan@broadcom.com \
--cc=jean-philippe@linaro.org \
--cc=julien.grall@arm.com \
--cc=lenb@kernel.org \
--cc=linux-acpi@vger.kernel.org \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-media@vger.kernel.org \
--cc=linux-pci@vger.kernel.org \
--cc=linux-remoteproc@vger.kernel.org \
--cc=linux-sh@vger.kernel.org \
--cc=linux-usb@vger.kernel.org \
--cc=linux@armlinux.org.uk \
--cc=mchehab@kernel.org \
--cc=mingo@redhat.com \
--cc=mripard@kernel.org \
--cc=natechancellor@gmail.com \
--cc=ohad@wizery.com \
--cc=paul.kocialkowski@bootlin.com \
--cc=rjw@rjwysocki.net \
--cc=robh+dt@kernel.org \
--cc=robin.murphy@arm.com \
--cc=saravanak@google.com \
--cc=ssantosh@kernel.org \
--cc=sstabellini@kernel.org \
--cc=stern@rowland.harvard.edu \
--cc=sudeep.holla@arm.com \
--cc=tglx@linutronix.de \
--cc=wens@csie.org \
--cc=will@kernel.org \
--cc=x86@kernel.org \
--cc=yong.deng@magewell.com \
--cc=ysato@users.sourceforge.jp \
/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;
as well as URLs for NNTP newsgroup(s).