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From: Dmitry Osipenko <digetx-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
To: Greg Kroah-Hartman
	<gregkh-hQyY1W1yCW8ekmWlsbkhG0B+6BGkLq7r@public.gmane.org>,
	"Rafael J. Wysocki"
	<rafael-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
	Thierry Reding
	<thierry.reding-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
	Jonathan Hunter
	<jonathanh-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>,
	Mikko Perttunen <cyndis-/1wQRMveznE@public.gmane.org>,
	Rob Herring <robh+dt-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
	Frank Rowand
	<frowand.list-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
	Ben Skeggs <bskeggs-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>,
	Russell King <linux-I+IVW8TIWO2tmTQ+vhA3Yw@public.gmane.org>,
	Catalin Marinas <catalin.marinas-5wv7dgnIgG8@public.gmane.org>,
	Will Deacon <will.deacon-5wv7dgnIgG8@public.gmane.org>,
	Joerg Roedel <joro-zLv9SwRftAIdnm+yROfE0A@public.gmane.org>,
	Nicolas Chauvet <kwizart-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Cc: devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	nouveau-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org,
	linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	dri-devel-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org,
	iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org,
	linux-tegra-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: [RFC PATCH v1 4/6] gpu: host1x: Avoid implicit DMA backing with IOMMU
Date: Fri, 27 Jul 2018 02:16:22 +0300	[thread overview]
Message-ID: <20180726231624.21084-5-digetx@gmail.com> (raw)
In-Reply-To: <20180726231624.21084-1-digetx-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>

Host1x driver manages IOMMU by itself, backing DMA with IOMMU by the
drivers core breaks the Host1x driver.

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
---
 drivers/gpu/host1x/dev.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/host1x/dev.c b/drivers/gpu/host1x/dev.c
index afabd33a48d9..0966415d4ccd 100644
--- a/drivers/gpu/host1x/dev.c
+++ b/drivers/gpu/host1x/dev.c
@@ -361,6 +361,7 @@ static int host1x_remove(struct platform_device *pdev)
 static struct platform_driver tegra_host1x_driver = {
 	.driver = {
 		.name = "tegra-host1x",
+		.no_implicit_iommu = true,
 		.of_match_table = host1x_of_match,
 	},
 	.probe = host1x_probe,
-- 
2.18.0

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WARNING: multiple messages have this Message-ID (diff)
From: Dmitry Osipenko <digetx@gmail.com>
To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	"Rafael J. Wysocki" <rafael@kernel.org>,
	Thierry Reding <thierry.reding@gmail.com>,
	Jonathan Hunter <jonathanh@nvidia.com>,
	Mikko Perttunen <cyndis@kapsi.fi>,
	Rob Herring <robh+dt@kernel.org>,
	Frank Rowand <frowand.list@gmail.com>,
	Ben Skeggs <bskeggs@redhat.com>,
	Russell King <linux@armlinux.org.uk>,
	Catalin Marinas <catalin.marinas@arm.com>,
	Will Deacon <will.deacon@arm.com>, Joerg Roedel <joro@8bytes.org>,
	Nicolas Chauvet <kwizart@gmail.com>
Cc: devicetree@vger.kernel.org, nouveau@lists.freedesktop.org,
	iommu@lists.linux-foundation.org,
	dri-devel@lists.freedesktop.org, linux-tegra@vger.kernel.org,
	linux-kernel@vger.kernel.org
Subject: [RFC PATCH v1 4/6] gpu: host1x: Avoid implicit DMA backing with IOMMU
Date: Fri, 27 Jul 2018 02:16:22 +0300	[thread overview]
Message-ID: <20180726231624.21084-5-digetx@gmail.com> (raw)
In-Reply-To: <20180726231624.21084-1-digetx@gmail.com>

Host1x driver manages IOMMU by itself, backing DMA with IOMMU by the
drivers core breaks the Host1x driver.

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
---
 drivers/gpu/host1x/dev.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/host1x/dev.c b/drivers/gpu/host1x/dev.c
index afabd33a48d9..0966415d4ccd 100644
--- a/drivers/gpu/host1x/dev.c
+++ b/drivers/gpu/host1x/dev.c
@@ -361,6 +361,7 @@ static int host1x_remove(struct platform_device *pdev)
 static struct platform_driver tegra_host1x_driver = {
 	.driver = {
 		.name = "tegra-host1x",
+		.no_implicit_iommu = true,
 		.of_match_table = host1x_of_match,
 	},
 	.probe = host1x_probe,
-- 
2.18.0


  parent reply	other threads:[~2018-07-26 23:16 UTC|newest]

Thread overview: 42+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-07-26 23:16 [RFC PATCH v1 0/6] Resolve unwanted DMA backing with IOMMU Dmitry Osipenko
2018-07-26 23:16 ` Dmitry Osipenko
2018-07-26 23:16 ` [RFC PATCH v1 1/6] driver core: Add option for disabling of backing devices DMA " Dmitry Osipenko
     [not found] ` <20180726231624.21084-1-digetx-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2018-07-26 23:16   ` [RFC PATCH v1 2/6] of/device: Don't back devices DMA with IOMMU if that's undesired by driver Dmitry Osipenko
2018-07-26 23:16     ` Dmitry Osipenko
2018-07-26 23:16   ` [RFC PATCH v1 3/6] drm/tegra: Avoid implicit DMA backing with IOMMU Dmitry Osipenko
2018-07-26 23:16     ` Dmitry Osipenko
2018-07-26 23:16   ` Dmitry Osipenko [this message]
2018-07-26 23:16     ` [RFC PATCH v1 4/6] gpu: host1x: " Dmitry Osipenko
2018-07-26 23:16   ` [RFC PATCH v1 6/6] Revert "drm/nouveau: tegra: Detach from ARM DMA/IOMMU mapping" Dmitry Osipenko
2018-07-26 23:16     ` Dmitry Osipenko
2018-07-26 23:16 ` [RFC PATCH v1 5/6] drm/nouveau: tegra: Universally avoid implicit DMA backing with IOMMU Dmitry Osipenko
2018-07-27  8:25 ` [RFC PATCH v1 0/6] Resolve unwanted " Joerg Roedel
2018-07-27  9:03   ` Will Deacon
     [not found]     ` <20180727090328.GH28088-5wv7dgnIgG8@public.gmane.org>
2018-07-27 14:10       ` Dmitry Osipenko
2018-07-27 14:10         ` Dmitry Osipenko
2018-07-27 14:20         ` Joerg Roedel
2018-07-27 14:20           ` Joerg Roedel
2018-07-27 17:13           ` Rob Herring
2018-07-27 17:13             ` Rob Herring
2018-07-27 18:31             ` Joerg Roedel
2018-07-27 18:31               ` Joerg Roedel
     [not found]               ` <20180727183134.GD6738-zLv9SwRftAIdnm+yROfE0A@public.gmane.org>
2018-07-27 20:02                 ` Dmitry Osipenko
2018-07-27 20:02                   ` Dmitry Osipenko
2018-07-27 16:02         ` Robin Murphy
2018-07-27 16:02           ` Robin Murphy
     [not found]           ` <daadd395-dcb7-9505-f171-0fcc28570301-5wv7dgnIgG8@public.gmane.org>
2018-07-27 17:03             ` Jordan Crouse
2018-07-27 17:03               ` Jordan Crouse
     [not found]               ` <20180727170326.GA21283-9PYrDHPZ2Orvke4nUoYGnHL1okKdlPRT@public.gmane.org>
2018-07-27 17:16                 ` Dmitry Osipenko
2018-07-27 17:16                   ` Dmitry Osipenko
2018-07-28 11:40                   ` Dmitry Osipenko
2018-07-28 11:40                     ` Dmitry Osipenko
2018-08-02 18:24                   ` Dmitry Osipenko
2018-08-02 18:24                     ` Dmitry Osipenko
2018-08-03 15:43                     ` Robin Murphy
2018-08-03 17:00                       ` Jordan Crouse
2018-08-03 17:00                         ` Jordan Crouse
2018-08-15 19:56                       ` Dmitry Osipenko
2018-08-16 17:23                         ` Robin Murphy
2018-08-16 17:23                           ` Robin Murphy
     [not found]                           ` <afecce46-96d2-9688-30b4-0a3f17a651d3-5wv7dgnIgG8@public.gmane.org>
2018-09-20 17:09                             ` Dmitry Osipenko
2018-09-20 17:09                               ` Dmitry Osipenko

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