From: Lee Revell <rlrevell@joe-job.com>
To: Matthew Wilcox <matthew@wil.cx>
Cc: Arjan van de Ven <arjan@infradead.org>,
Jeff Garzik <jgarzik@pobox.com>,
mike.miller@hp.com, akpm@osdl.org, axboe@suse.de,
linux-kernel@vger.kernel.org, linux-scsi@vger.kernel.org
Subject: Re: DMA mapping (was Re: [PATCH] cciss 2.6; replaces DMA masks with kernel defines)
Date: Wed, 15 Jun 2005 14:19:03 -0400 [thread overview]
Message-ID: <1118859544.23353.14.camel@mindpipe> (raw)
In-Reply-To: <20050611135411.GJ24611@parcelfarce.linux.theplanet.co.uk>
On Sat, 2005-06-11 at 14:54 +0100, Matthew Wilcox wrote:
> On Fri, Jun 10, 2005 at 07:08:11PM -0400, Lee Revell wrote:
> > Should I just add everything from 24 to 63?
>
> Actually, it'd be useful to have a central list of what DMA masks devices
> really take. It might provide some arguments for changing the zone allocater.
>
OK, patch attached. I don't have time to cover every case, maybe
someone else can run with this.
Lee
Summary: Add DMA mask constants other than 32 and 64 bit
Signed-Off-By: Lee Revell <rlrevell@joe-job.com>
--- linux-2.6.12-rc5-k7/include/linux/dma-mapping.h-orig 2005-06-15 14:14:04.000000000 -0400
+++ linux-2.6.12-rc5-k7/include/linux/dma-mapping.h 2005-06-15 14:17:13.000000000 -0400
@@ -14,7 +14,12 @@
};
#define DMA_64BIT_MASK 0xffffffffffffffffULL
+#define DMA_40BIT_MASK 0x000000ffffffffffULL
+#define DMA_39BIT_MASK 0x0000007fffffffffULL
#define DMA_32BIT_MASK 0x00000000ffffffffULL
+#define DMA_31BIT_MASK 0x000000007fffffffULL
+#define DMA_30BIT_MASK 0x000000003fffffffULL
+#define DMA_29BIT_MASK 0x000000001fffffffULL
#include <asm/dma-mapping.h>
next prev parent reply other threads:[~2005-06-15 18:16 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-06-10 14:34 [PATCH] cciss 2.6; replaces DMA masks with kernel defines mike.miller
2005-06-10 16:55 ` Jeff Garzik
2005-06-10 20:39 ` DMA mapping (was Re: [PATCH] cciss 2.6; replaces DMA masks with kernel defines) Lee Revell
2005-06-10 20:45 ` Arjan van de Ven
2005-06-10 20:49 ` Lee Revell
2005-06-11 18:32 ` jgarzik
2005-06-13 2:58 ` Jeff Garzik
2005-06-10 20:59 ` Lee Revell
2005-06-10 21:17 ` Lee Revell
2005-06-10 21:30 ` Matthew Wilcox
2005-06-10 23:08 ` Lee Revell
2005-06-11 13:54 ` Matthew Wilcox
2005-06-15 18:19 ` Lee Revell [this message]
2005-06-10 23:17 ` Lee Revell
2005-06-11 15:39 ` Pavel Machek
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