From: ezequiel.garcia@free-electrons.com (Ezequiel Garcia)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v5 01/20] ARM: Introduce atomic MMIO modify
Date: Tue, 28 Jan 2014 07:31:24 -0300 [thread overview]
Message-ID: <20140128103122.GB13052@localhost> (raw)
In-Reply-To: <1390836440-12744-2-git-send-email-ezequiel.garcia@free-electrons.com>
On Mon, Jan 27, 2014 at 12:27:01PM -0300, Ezequiel Garcia wrote:
> Some SoC have MMIO regions that are shared across orthogonal
> subsystems. This commit implements a possible solution for the
> thread-safe access of such regions through a spinlock-protected API.
>
> Concurrent access is protected with a single spinlock for the
> entire MMIO address space. While this protects shared-registers,
> it also serializes access to unrelated/unshared registers.
>
> We add relaxed and non-relaxed variants, by using writel_relaxed and writel,
> respectively. The rationale for this is that some users may not require
> register write completion but only thread-safe access to a register.
>
> Cc: Russell King - ARM Linux <linux@arm.linux.org.uk>
> Tested-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
> Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
> ---
> Russell,
>
> Can you confirm this patch is on its way to v3.14?
>
ping?
--
Ezequiel Garc?a, Free Electrons
Embedded Linux, Kernel and Android Engineering
http://free-electrons.com
next prev parent reply other threads:[~2014-01-28 10:31 UTC|newest]
Thread overview: 109+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-01-27 15:27 [PATCH v5 00/20] Armada 370/XP watchdog support Ezequiel Garcia
2014-01-27 15:27 ` Ezequiel Garcia
2014-01-27 15:27 ` Ezequiel Garcia
2014-01-27 15:27 ` [PATCH v5 01/20] ARM: Introduce atomic MMIO modify Ezequiel Garcia
2014-01-27 15:27 ` Ezequiel Garcia
2014-01-27 15:27 ` Ezequiel Garcia
2014-01-28 10:31 ` Ezequiel Garcia [this message]
2014-01-27 15:27 ` [PATCH v5 02/20] clocksource: orion: Use atomic access for shared registers Ezequiel Garcia
2014-01-27 15:27 ` Ezequiel Garcia
2014-01-27 15:27 ` Ezequiel Garcia
2014-02-05 19:10 ` Jason Cooper
2014-02-05 19:10 ` Jason Cooper
2014-02-05 19:10 ` Jason Cooper
2014-02-05 23:19 ` Ezequiel Garcia
2014-02-05 23:19 ` Ezequiel Garcia
2014-02-05 23:19 ` Ezequiel Garcia
2014-02-06 23:47 ` Daniel Lezcano
2014-02-06 23:47 ` Daniel Lezcano
2014-02-06 23:47 ` Daniel Lezcano
2014-01-27 15:27 ` [PATCH v5 03/20] watchdog: orion: Add clock error handling Ezequiel Garcia
2014-01-27 15:27 ` Ezequiel Garcia
2014-01-27 15:27 ` Ezequiel Garcia
2014-01-27 15:27 ` [PATCH v5 04/20] watchdog: orion: Use atomic access for shared registers Ezequiel Garcia
2014-01-27 15:27 ` Ezequiel Garcia
2014-01-27 15:27 ` Ezequiel Garcia
2014-01-27 15:27 ` [PATCH v5 05/20] watchdog: orion: Remove unused macros Ezequiel Garcia
2014-01-27 15:27 ` Ezequiel Garcia
2014-01-27 15:27 ` Ezequiel Garcia
2014-01-27 15:27 ` [PATCH v5 06/20] watchdog: orion: Make sure the watchdog is initially stopped Ezequiel Garcia
2014-01-27 15:27 ` Ezequiel Garcia
2014-01-27 15:27 ` Ezequiel Garcia
2014-01-27 15:27 ` [PATCH v5 07/20] watchdog: orion: Handle the interrupt so it's properly acked Ezequiel Garcia
2014-01-27 15:27 ` Ezequiel Garcia
2014-01-27 15:27 ` Ezequiel Garcia
2014-01-27 15:27 ` [PATCH v5 08/20] watchdog: orion: Make RSTOUT register a separate resource Ezequiel Garcia
2014-01-27 15:27 ` Ezequiel Garcia
2014-01-27 15:27 ` Ezequiel Garcia
2014-01-27 15:27 ` [PATCH v5 09/20] watchdog: orion: Remove unneeded BRIDGE_CAUSE clear Ezequiel Garcia
2014-01-27 15:27 ` Ezequiel Garcia
2014-01-27 15:27 ` Ezequiel Garcia
2014-01-27 15:27 ` [PATCH v5 10/20] watchdog: orion: Introduce an orion_watchdog device structure Ezequiel Garcia
2014-01-27 15:27 ` Ezequiel Garcia
2014-01-27 15:27 ` Ezequiel Garcia
2014-01-27 15:27 ` [PATCH v5 11/20] watchdog: orion: Introduce per-compatible of_device_id data Ezequiel Garcia
2014-01-27 15:27 ` Ezequiel Garcia
2014-01-27 15:27 ` Ezequiel Garcia
2014-01-27 15:27 ` [PATCH v5 12/20] watchdog: orion: Add per-compatible clock initialization Ezequiel Garcia
2014-01-27 15:27 ` Ezequiel Garcia
2014-01-27 15:27 ` Ezequiel Garcia
2014-01-27 15:27 ` [PATCH v5 13/20] watchdog: orion: Add per-compatible watchdog start implementation Ezequiel Garcia
2014-01-27 15:27 ` Ezequiel Garcia
2014-01-27 15:27 ` Ezequiel Garcia
2014-01-27 15:27 ` [PATCH v5 14/20] watchdog: orion: Add support for Armada 370 and Armada XP SoC Ezequiel Garcia
2014-01-27 15:27 ` Ezequiel Garcia
2014-01-27 15:27 ` Ezequiel Garcia
2014-01-27 17:36 ` Russell King - ARM Linux
2014-01-27 17:36 ` Russell King - ARM Linux
2014-01-27 17:36 ` Russell King - ARM Linux
2014-01-28 10:27 ` Ezequiel Garcia
2014-01-28 10:27 ` Ezequiel Garcia
2014-01-28 10:27 ` Ezequiel Garcia
2014-01-27 15:27 ` [PATCH v5 15/20] ARM: mvebu: Enable Armada 370/XP watchdog in the devicetree Ezequiel Garcia
2014-01-27 15:27 ` Ezequiel Garcia
2014-01-27 15:27 ` Ezequiel Garcia
2014-01-27 15:27 ` [PATCH v5 16/20] ARM: kirkwood: Add RSTOUT 'reg' entry to devicetree Ezequiel Garcia
2014-01-27 15:27 ` Ezequiel Garcia
2014-01-27 15:27 ` Ezequiel Garcia
2014-01-29 20:15 ` Andrew Lunn
2014-01-29 20:15 ` Andrew Lunn
2014-01-29 20:15 ` Andrew Lunn
2014-01-27 15:27 ` [PATCH v5 17/20] ARM: dove: Enable Dove watchdog in the devicetree Ezequiel Garcia
2014-01-27 15:27 ` Ezequiel Garcia
2014-01-27 15:27 ` Ezequiel Garcia
2014-01-27 15:27 ` [PATCH v5 18/20] watchdog: orion: Enable the build on ARCH_MVEBU Ezequiel Garcia
2014-01-27 15:27 ` Ezequiel Garcia
2014-01-27 15:27 ` Ezequiel Garcia
2014-01-27 15:27 ` [PATCH v5 19/20] ARM: mvebu: Enable watchdog support in defconfig Ezequiel Garcia
2014-01-27 15:27 ` Ezequiel Garcia
2014-01-27 15:27 ` Ezequiel Garcia
2014-01-27 15:27 ` [PATCH v5 20/20] ARM: dove: Enable watchdog support in the defconfig Ezequiel Garcia
2014-01-27 15:27 ` Ezequiel Garcia
2014-01-27 15:27 ` Ezequiel Garcia
2014-01-27 15:50 ` [PATCH v5 00/20] Armada 370/XP watchdog support Jason Cooper
2014-01-27 15:50 ` Jason Cooper
2014-01-27 15:50 ` Jason Cooper
2014-01-29 18:19 ` Ezequiel Garcia
2014-01-29 18:19 ` Ezequiel Garcia
2014-01-29 18:19 ` Ezequiel Garcia
2014-01-30 20:53 ` Jason Cooper
2014-01-30 20:53 ` Jason Cooper
2014-01-30 20:53 ` Jason Cooper
2014-01-30 21:50 ` Ezequiel Garcia
2014-01-30 21:50 ` Ezequiel Garcia
2014-01-30 21:50 ` Ezequiel Garcia
2014-01-30 22:00 ` Sebastian Hesselbarth
2014-01-30 22:00 ` Sebastian Hesselbarth
2014-01-30 22:00 ` Sebastian Hesselbarth
2014-01-30 22:16 ` Jason Cooper
2014-01-30 22:16 ` Jason Cooper
2014-01-30 22:16 ` Jason Cooper
2014-01-30 22:37 ` Ezequiel Garcia
2014-01-30 22:37 ` Ezequiel Garcia
2014-01-30 22:37 ` Ezequiel Garcia
2014-01-31 17:25 ` Willy Tarreau
2014-01-31 17:25 ` Willy Tarreau
2014-01-31 17:25 ` Willy Tarreau
2014-02-05 19:06 ` Jason Cooper
2014-02-05 19:06 ` Jason Cooper
2014-02-05 19:06 ` Jason Cooper
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