From: Arnd Bergmann <arnd@arndb.de>
To: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: linux-kernel@vger.kernel.org, Jeff Garzik <jgarzik@pobox.com>,
linux-ide@vger.kernel.org, takata@linux-m32r.org,
geert@linux-m68k.org, linux-m68k@lists.linux-m68k.org,
ysato@users.sourceforge.jp
Subject: Re: [PATCH] ata: libata depends on HAS_DMA
Date: Tue, 12 May 2009 11:23:20 +0200 [thread overview]
Message-ID: <200905121123.21436.arnd@arndb.de> (raw)
In-Reply-To: <20090512090602.65722342@lxorguk.ukuu.org.uk>
On Tuesday 12 May 2009, Alan Cox wrote:
> Nakked-by: Alan Cox <alan@linux.intel.com>
>
> Almost every PATA adapter can fall back to PIO, many are PIO only. We
> need a rather cleaner way to sort this.
Currently, the only architectures that don't set HAS_DMA are h8300, m32r
m68k (except SUN3 and Coldfire), microblaze and s390.
s390 will never get it, microblaze is currently implementing dma-mapping.h.
The other three are still using drivers/ide instead of drivers/ata.
One way to fix this would be to implement dma-mapping.h in h8300, m32r and
m68k and leave !HAS_DMA as the obscure s390 case (this one already can't
use ATA because of !HAS_MMIO).
The other way would be to add some #ifdef CONFIG_HAS_DMA in libata-core.c
and sas_ata.c.
Arnd <><
Arnd <><
WARNING: multiple messages have this Message-ID (diff)
From: Arnd Bergmann <arnd@arndb.de>
To: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: linux-kernel@vger.kernel.org, Jeff Garzik <jgarzik@pobox.com>,
linux-ide@vger.kernel.org, takata@linux-m32r.org,
geert@linux-m68k.org, linux-m68k@vger.kernel.org,
ysato@users.sourceforge.jp
Subject: Re: [PATCH] ata: libata depends on HAS_DMA
Date: Tue, 12 May 2009 11:23:20 +0200 [thread overview]
Message-ID: <200905121123.21436.arnd@arndb.de> (raw)
In-Reply-To: <20090512090602.65722342@lxorguk.ukuu.org.uk>
On Tuesday 12 May 2009, Alan Cox wrote:
> Nakked-by: Alan Cox <alan@linux.intel.com>
>
> Almost every PATA adapter can fall back to PIO, many are PIO only. We
> need a rather cleaner way to sort this.
Currently, the only architectures that don't set HAS_DMA are h8300, m32r
m68k (except SUN3 and Coldfire), microblaze and s390.
s390 will never get it, microblaze is currently implementing dma-mapping.h.
The other three are still using drivers/ide instead of drivers/ata.
One way to fix this would be to implement dma-mapping.h in h8300, m32r and
m68k and leave !HAS_DMA as the obscure s390 case (this one already can't
use ATA because of !HAS_MMIO).
The other way would be to add some #ifdef CONFIG_HAS_DMA in libata-core.c
and sas_ata.c.
Arnd <><
Arnd <><
next prev parent reply other threads:[~2009-05-12 9:23 UTC|newest]
Thread overview: 86+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20090511222702.352192505@arndb.de>
2009-05-11 22:37 ` [PATCH] mb862xxfb: use CONFIG_OF instead of CONFIG_PPC_OF Arnd Bergmann
2009-05-13 12:25 ` Anatolij Gustschin
2009-05-11 22:38 ` [PATCH] ata: libata depends on HAS_DMA Arnd Bergmann
2009-05-12 0:58 ` Jeff Garzik
2009-05-12 12:40 ` Arnd Bergmann
2009-05-12 13:05 ` Arnd Bergmann
2009-05-12 13:05 ` Arnd Bergmann
2009-05-12 8:06 ` Alan Cox
2009-05-12 9:23 ` Arnd Bergmann [this message]
2009-05-12 9:23 ` Arnd Bergmann
2009-05-13 3:30 ` Brad Boyer
2009-05-13 3:30 ` Brad Boyer
2009-05-13 4:12 ` Michael Schmitz
2009-05-13 4:12 ` Michael Schmitz
2009-05-13 4:12 ` Michael Schmitz
2009-05-13 4:34 ` Brad Boyer
2009-05-13 4:34 ` Brad Boyer
2009-05-13 8:51 ` Alan Cox
2009-05-13 8:55 ` Geert Uytterhoeven
2009-05-13 23:57 ` Robert Hancock
2009-05-14 0:18 ` FUJITA Tomonori
2009-05-15 5:31 ` Tejun Heo
2009-05-15 11:16 ` Arnd Bergmann
2009-05-15 11:16 ` Arnd Bergmann
2009-05-15 11:21 ` Tejun Heo
2009-05-15 11:55 ` Arnd Bergmann
2009-05-17 9:00 ` Robert Hancock
2009-05-17 19:38 ` Arnd Bergmann
2009-05-17 20:05 ` Jeff Garzik
2009-05-17 22:45 ` [PATCH] asm-generic: add a dma-mapping.h file Arnd Bergmann
2009-05-18 6:03 ` Geert Uytterhoeven
2009-05-18 6:03 ` Geert Uytterhoeven
2009-05-18 8:28 ` Arnd Bergmann
2009-05-18 10:45 ` FUJITA Tomonori
2009-05-18 14:45 ` Arnd Bergmann
2009-05-18 22:44 ` FUJITA Tomonori
2009-05-19 16:22 ` Arnd Bergmann
2009-05-19 17:01 ` Grant Grundler
2009-05-19 17:40 ` Arnd Bergmann
2009-05-19 18:08 ` Grant Grundler
2009-05-19 18:08 ` Grant Grundler
2009-05-22 12:12 ` FUJITA Tomonori
2009-05-22 14:07 ` Arnd Bergmann
2009-05-22 14:38 ` FUJITA Tomonori
2009-05-22 15:05 ` Arnd Bergmann
2009-05-26 4:36 ` FUJITA Tomonori
2009-05-26 12:35 ` Arnd Bergmann
2009-05-27 3:58 ` FUJITA Tomonori
2009-05-18 22:54 ` Jeff Garzik
2009-05-18 23:22 ` FUJITA Tomonori
2009-05-18 10:45 ` [PATCH] ata: libata depends on HAS_DMA FUJITA Tomonori
2009-05-13 10:39 ` Arnd Bergmann
2009-05-13 10:39 ` Arnd Bergmann
2009-05-13 10:39 ` Arnd Bergmann
2009-05-11 22:40 ` [PATCH] scsi: libsas " Arnd Bergmann
2009-05-11 22:50 ` James Bottomley
2009-05-11 22:59 ` James Bottomley
2009-05-11 23:16 ` Arnd Bergmann
2009-05-11 22:43 ` [PATCH] arm: rename CLOCK_TICK_RATE to ARM_TICK_RATE Arnd Bergmann
2009-05-11 23:11 ` [PATCH v2] " Arnd Bergmann
2009-05-13 17:11 ` [PATCH] " Arnd Bergmann
2009-05-11 22:50 ` [PATCH] x86: use PIT_TICK_RATE consistently Arnd Bergmann
2009-05-11 23:05 ` Arnd Bergmann
2009-05-11 22:55 ` [PATCH] move PIT_TICK_RATE to linux/timex.h Arnd Bergmann
2009-05-11 22:55 ` Arnd Bergmann
2009-05-12 0:01 ` Andrew Morton
2009-05-12 0:36 ` Arnd Bergmann
2009-05-11 22:57 ` [PATCH] mips: use PIT_TICK_RATE in i8253 Arnd Bergmann
2009-05-11 22:58 ` [PATCH] input: use PIT_TICK_RATE in vt beep ioctl Arnd Bergmann
2009-05-12 9:31 ` Alan Cox
2009-05-11 22:59 ` [PATCH] x86: fix ktermios-termio conversion Arnd Bergmann
2009-05-11 23:19 ` [PATCH v2] " Arnd Bergmann
2009-05-12 7:55 ` Ingo Molnar
2009-05-12 9:04 ` Arnd Bergmann
2009-05-12 9:10 ` Ingo Molnar
2009-05-12 9:21 ` Alan Cox
2009-05-12 9:26 ` Ingo Molnar
2009-05-12 10:05 ` Alan Cox
2009-05-12 10:15 ` Ingo Molnar
2009-05-12 11:33 ` [PATCH v3] " Arnd Bergmann
2009-05-12 11:42 ` [PATCH v2] " Arnd Bergmann
2009-05-12 9:17 ` Alan Cox
2009-05-11 23:02 ` [PATCH] ipc: use __ARCH_WANT_IPC_PARSE_VERSION in ipc/util.h Arnd Bergmann
2009-05-12 0:19 ` Serge E. Hallyn
2009-05-11 23:03 ` [PATCH] syscalls.h add the missing sys_pipe2 declaration Arnd Bergmann
2009-05-11 23:08 ` Arnd Bergmann
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