From: Rob Herring <robherring2@gmail.com>
To: Subash Patel <subashrp@gmail.com>
Cc: devicetree-discuss@lists.ozlabs.org,
linux-arm-kernel@lists.infradead.org,
linux-samsung-soc@vger.kernel.org, subash.rp@samsung.com,
kgene.kim@samsung.com, thomas.abraham@linaro.org
Subject: Re: [PATCH] OF: update coherent_dma_mask
Date: Mon, 10 Dec 2012 10:30:01 -0600 [thread overview]
Message-ID: <50C60E09.8050805@gmail.com> (raw)
In-Reply-To: <1355141369-30030-1-git-send-email-subash.rp@samsung.com>
On 12/10/2012 06:09 AM, Subash Patel wrote:
> This patch is tested in ARM:exynos5250 with LPAE enabled. The coherent_dma_mask
> needs to be defined to DMA_BIT_MASK(64) as dma-mapping API's check it against
> 64-bit mask.
>
> Signed-off-by: Subash Patel <subash.rp@samsung.com>
> ---
> drivers/of/platform.c | 2 +-
> 1 files changed, 1 insertions(+), 1 deletions(-)
>
> diff --git a/drivers/of/platform.c b/drivers/of/platform.c
> index 9bdeaf30..3c5417b 100644
> --- a/drivers/of/platform.c
> +++ b/drivers/of/platform.c
> @@ -214,7 +214,7 @@ struct platform_device *of_platform_device_create_pdata(
> #if defined(CONFIG_MICROBLAZE)
> dev->archdata.dma_mask = 0xffffffffUL;
> #endif
> - dev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
> + dev->dev.coherent_dma_mask = DMA_BIT_MASK(64);
> dev->dev.bus = &platform_bus_type;
> dev->dev.platform_data = platform_data;
This is assuming all masters support 64-bit addressing which is probably
not universally valid. This really needs to be determined from the DT
and there's been recent patches to do this[1] although they need more work.
[1] - https://lkml.org/lkml/2012/12/4/54
Rob
WARNING: multiple messages have this Message-ID (diff)
From: robherring2@gmail.com (Rob Herring)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH] OF: update coherent_dma_mask
Date: Mon, 10 Dec 2012 10:30:01 -0600 [thread overview]
Message-ID: <50C60E09.8050805@gmail.com> (raw)
In-Reply-To: <1355141369-30030-1-git-send-email-subash.rp@samsung.com>
On 12/10/2012 06:09 AM, Subash Patel wrote:
> This patch is tested in ARM:exynos5250 with LPAE enabled. The coherent_dma_mask
> needs to be defined to DMA_BIT_MASK(64) as dma-mapping API's check it against
> 64-bit mask.
>
> Signed-off-by: Subash Patel <subash.rp@samsung.com>
> ---
> drivers/of/platform.c | 2 +-
> 1 files changed, 1 insertions(+), 1 deletions(-)
>
> diff --git a/drivers/of/platform.c b/drivers/of/platform.c
> index 9bdeaf30..3c5417b 100644
> --- a/drivers/of/platform.c
> +++ b/drivers/of/platform.c
> @@ -214,7 +214,7 @@ struct platform_device *of_platform_device_create_pdata(
> #if defined(CONFIG_MICROBLAZE)
> dev->archdata.dma_mask = 0xffffffffUL;
> #endif
> - dev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
> + dev->dev.coherent_dma_mask = DMA_BIT_MASK(64);
> dev->dev.bus = &platform_bus_type;
> dev->dev.platform_data = platform_data;
This is assuming all masters support 64-bit addressing which is probably
not universally valid. This really needs to be determined from the DT
and there's been recent patches to do this[1] although they need more work.
[1] - https://lkml.org/lkml/2012/12/4/54
Rob
next prev parent reply other threads:[~2012-12-10 16:30 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-12-10 12:09 [PATCH] OF: update coherent_dma_mask Subash Patel
2012-12-10 12:09 ` Subash Patel
2012-12-10 16:30 ` Rob Herring [this message]
2012-12-10 16:30 ` Rob Herring
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=50C60E09.8050805@gmail.com \
--to=robherring2@gmail.com \
--cc=devicetree-discuss@lists.ozlabs.org \
--cc=kgene.kim@samsung.com \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-samsung-soc@vger.kernel.org \
--cc=subash.rp@samsung.com \
--cc=subashrp@gmail.com \
--cc=thomas.abraham@linaro.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: link
Be 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.