All of lore.kernel.org
 help / color / mirror / Atom feed
From: Arnd Bergmann <arnd-r2nGTMty4D4@public.gmane.org>
To: linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org
Cc: Santosh Shilimkar
	<santosh.shilimkar-l0cyMroinI0@public.gmane.org>,
	devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	Grygorii Strashko
	<grygorii.strashko-l0cyMroinI0@public.gmane.org>,
	Russell King <linux-lFZ/pmaqli7XmaaqVzeoHQ@public.gmane.org>,
	linus.walleij-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org,
	magnus.damm-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org,
	Olof Johansson <olof-nZhT3qVonbNeoWH0uzbU5w@public.gmane.org>,
	robh+dt-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org,
	grant.likely-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org
Subject: Re: [PATCH v2 1/7] ARM: mm: Introduce archdata.dma_pfn_offset
Date: Fri, 28 Feb 2014 10:30:48 +0100	[thread overview]
Message-ID: <6612551.WqU0SU4pc9@wuerfel> (raw)
In-Reply-To: <1393535872-20915-2-git-send-email-santosh.shilimkar-l0cyMroinI0@public.gmane.org>

On Thursday 27 February 2014 16:17:46 Santosh Shilimkar wrote:
> From: Grygorii Strashko <grygorii.strashko-l0cyMroinI0@public.gmane.org>
> 
> In most of cases DMA addresses can be performed using offset value of
>  Bus address space relatively to physical address space as following:
> 
> PFN->DMA:
>  __pfn_to_phys(pfn + [-]dma_pfn_offset)
> 
> DMA->PFN:
>  __phys_to_pfn(dma_addr) + [-]dma_pfn_offset
> 
> This patch introduces new field dma_pfn_offset in ARM dev_archdata
> structure which has to be filed per-device at arch init time
> (simplest way is to use Platform bus notifier to handle
> BUS_NOTIFY_ADD_DEVICE event) and updates DMA address translation
> routines in order to accommodate bus offset value by default.
> 
> Cc: Russell King <linux-lFZ/pmaqli7XmaaqVzeoHQ@public.gmane.org>
> Cc: Arnd Bergmann <arnd-r2nGTMty4D4@public.gmane.org>
> Cc: Olof Johansson <olof-nZhT3qVonbNeoWH0uzbU5w@public.gmane.org>
> Signed-off-by: Grygorii Strashko <grygorii.strashko-l0cyMroinI0@public.gmane.org>
> Signed-off-by: Santosh Shilimkar <santosh.shilimkar-l0cyMroinI0@public.gmane.org>

This was my suggestion, and the implementation is trivial, so

Acked-by: Arnd Bergmann <arnd-r2nGTMty4D4@public.gmane.org>

This should be most of what LinusW needs to generalize the
mach-integrator PCI DMA mapping.
--
To unsubscribe from this list: send the line "unsubscribe devicetree" in
the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html

WARNING: multiple messages have this Message-ID (diff)
From: arnd@arndb.de (Arnd Bergmann)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v2 1/7] ARM: mm: Introduce archdata.dma_pfn_offset
Date: Fri, 28 Feb 2014 10:30:48 +0100	[thread overview]
Message-ID: <6612551.WqU0SU4pc9@wuerfel> (raw)
In-Reply-To: <1393535872-20915-2-git-send-email-santosh.shilimkar@ti.com>

On Thursday 27 February 2014 16:17:46 Santosh Shilimkar wrote:
> From: Grygorii Strashko <grygorii.strashko@ti.com>
> 
> In most of cases DMA addresses can be performed using offset value of
>  Bus address space relatively to physical address space as following:
> 
> PFN->DMA:
>  __pfn_to_phys(pfn + [-]dma_pfn_offset)
> 
> DMA->PFN:
>  __phys_to_pfn(dma_addr) + [-]dma_pfn_offset
> 
> This patch introduces new field dma_pfn_offset in ARM dev_archdata
> structure which has to be filed per-device at arch init time
> (simplest way is to use Platform bus notifier to handle
> BUS_NOTIFY_ADD_DEVICE event) and updates DMA address translation
> routines in order to accommodate bus offset value by default.
> 
> Cc: Russell King <linux@arm.linux.org.uk>
> Cc: Arnd Bergmann <arnd@arndb.de>
> Cc: Olof Johansson <olof@lixom.net>
> Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
> Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com>

This was my suggestion, and the implementation is trivial, so

Acked-by: Arnd Bergmann <arnd@arndb.de>

This should be most of what LinusW needs to generalize the
mach-integrator PCI DMA mapping.

  parent reply	other threads:[~2014-02-28  9:30 UTC|newest]

Thread overview: 58+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-02-27 21:17 [PATCH v2 0/7] ARM: dma: Support dma-ranges and dma-coherent Santosh Shilimkar
2014-02-27 21:17 ` Santosh Shilimkar
2014-02-27 21:17 ` [PATCH v2 1/7] ARM: mm: Introduce archdata.dma_pfn_offset Santosh Shilimkar
2014-02-27 21:17   ` Santosh Shilimkar
     [not found]   ` <1393535872-20915-2-git-send-email-santosh.shilimkar-l0cyMroinI0@public.gmane.org>
2014-02-28  9:30     ` Arnd Bergmann [this message]
2014-02-28  9:30       ` Arnd Bergmann
2014-03-05  4:45     ` Linus Walleij
2014-03-05  4:45       ` Linus Walleij
     [not found]       ` <CACRpkdaRgf2yn51HYnJHBVKdrGdYhwSr0yf2GLmT3DwzmPbMDA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2014-03-05  6:37         ` Santosh Shilimkar
2014-03-05  6:37           ` Santosh Shilimkar
     [not found] ` <1393535872-20915-1-git-send-email-santosh.shilimkar-l0cyMroinI0@public.gmane.org>
2014-02-27 21:17   ` [PATCH v2 2/7] ARM: mm: Remove unsed dma_to_virt() Santosh Shilimkar
2014-02-27 21:17     ` Santosh Shilimkar
     [not found]     ` <1393535872-20915-3-git-send-email-santosh.shilimkar-l0cyMroinI0@public.gmane.org>
2014-02-28  9:31       ` Arnd Bergmann
2014-02-28  9:31         ` Arnd Bergmann
2014-03-07  5:59     ` Greg Ungerer
2014-03-07  5:59       ` Greg Ungerer
2014-02-27 21:17   ` [PATCH v2 3/7] dma: of: introduce of_dma_get_range() helper Santosh Shilimkar
2014-02-27 21:17     ` Santosh Shilimkar
2014-02-27 21:17   ` [PATCH v2 4/7] dma: of: introduce of_dma_is_coherent() helper Santosh Shilimkar
2014-02-27 21:17     ` Santosh Shilimkar
2014-02-28  9:39     ` Arnd Bergmann
2014-02-28  9:39       ` Arnd Bergmann
2014-02-28 14:17       ` Santosh Shilimkar
2014-02-28 14:17         ` Santosh Shilimkar
     [not found]         ` <53109A64.9030701-l0cyMroinI0@public.gmane.org>
2014-03-03  1:49           ` Catalin Marinas
2014-03-03  1:49             ` Catalin Marinas
2014-02-28 15:14       ` Rob Herring
2014-02-28 15:14         ` Rob Herring
     [not found]         ` <CAL_JsqL6-hoD4F7+adPhsOJXeM5f+wpEuBWg_6AWqj3k2v0NEw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2014-02-28 15:17           ` Santosh Shilimkar
2014-02-28 15:17             ` Santosh Shilimkar
2014-02-28 15:24           ` Arnd Bergmann
2014-02-28 15:24             ` Arnd Bergmann
2014-03-03 14:04             ` Rob Herring
2014-03-03 14:04               ` Rob Herring
2014-03-04 15:21               ` Will Deacon
2014-03-04 15:21                 ` Will Deacon
2014-02-27 21:17   ` [PATCH v2 5/7] ARM: of: introduce common routine for DMA configuration Santosh Shilimkar
2014-02-27 21:17     ` Santosh Shilimkar
2014-02-28 10:00     ` Arnd Bergmann
2014-02-28 10:00       ` Arnd Bergmann
2014-02-28 11:49       ` Grygorii Strashko
2014-02-28 11:49         ` Grygorii Strashko
2014-02-28 11:14         ` Arnd Bergmann
2014-02-28 11:14           ` Arnd Bergmann
2014-02-28 15:06       ` Santosh Shilimkar
2014-02-28 15:06         ` Santosh Shilimkar
     [not found]         ` <5310A5F1.9070901-l0cyMroinI0@public.gmane.org>
2014-02-28 15:31           ` Arnd Bergmann
2014-02-28 15:31             ` Arnd Bergmann
2014-02-28 15:35             ` Santosh Shilimkar
2014-02-28 15:35               ` Santosh Shilimkar
2014-03-07  3:15       ` Linus Walleij
2014-03-07  3:15         ` Linus Walleij
     [not found]     ` <1393535872-20915-6-git-send-email-santosh.shilimkar-l0cyMroinI0@public.gmane.org>
2014-02-28 14:56       ` Rob Herring
2014-02-28 14:56         ` Rob Herring
2014-02-27 21:17   ` [PATCH v2 6/7] ARM: dts: keystone: Use dma-ranges property Santosh Shilimkar
2014-02-27 21:17     ` Santosh Shilimkar
2014-02-27 21:17   ` [PATCH v2 7/7] ARM: dts: keystone: Udate USB node for dma properties Santosh Shilimkar
2014-02-27 21:17     ` Santosh Shilimkar

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=6612551.WqU0SU4pc9@wuerfel \
    --to=arnd-r2ngtmty4d4@public.gmane.org \
    --cc=devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org \
    --cc=grant.likely-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org \
    --cc=grygorii.strashko-l0cyMroinI0@public.gmane.org \
    --cc=linus.walleij-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org \
    --cc=linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org \
    --cc=linux-lFZ/pmaqli7XmaaqVzeoHQ@public.gmane.org \
    --cc=magnus.damm-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org \
    --cc=olof-nZhT3qVonbNeoWH0uzbU5w@public.gmane.org \
    --cc=robh+dt-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org \
    --cc=santosh.shilimkar-l0cyMroinI0@public.gmane.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.