From: Tuomas Vainikka <tuomas.vainikka@aalto.fi>
To: Michael Schmitz <schmitzmic@gmail.com>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>,
Linux/m68k <linux-m68k@vger.kernel.org>
Subject: Re: [PATCH 0/2] Experimental Amiga Zorro ESP driver
Date: Mon, 19 Aug 2013 14:47:15 +0300 [thread overview]
Message-ID: <521205C3.1060807@aalto.fi> (raw)
In-Reply-To: <5211DBD8.5090801@gmail.com>
On 08/19/2013 11:48 AM, Michael Schmitz wrote:
> Geert,
>> On Sun, Aug 18, 2013 at 10:58 AM, Michael Schmitz
>> <schmitzmic@gmail.com> wrote:
>>> I'll also need to check the command_block and command_block_dma
>>> addresses -
>>> does the DMA require virtual or physical addresses?
>>
>> Physical, of course.
>
> :-) VDMA was invented a bit later ...
>
>
> I'll go check the usage of the DMA API calls again, but as the driver
> seems to do DMA fine until the short transfer, that seems the most
> likely cause. PIO for dma_count < 7 might be an option.
>
> I see transfers with esp_count=1 and dma_count=7 in the log - wonder
> why that works but the short 2/2 byte case does not.
>
Is it possible that the problem is with memory alignment?
http://fxr.watson.org/fxr/source/arch/amiga/dev/bzivsc.c?v=NETBSD#L360
https://groups.google.com/d/msg/comp.sys.amiga.hardware/FXwaSFoAPxc/zsXeP7PB6RoJ
-Tuomas
next prev parent reply other threads:[~2013-08-19 11:47 UTC|newest]
Thread overview: 53+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-06-06 20:56 [PATCH 0/2] Experimental Amiga Zorro ESP driver Michael Schmitz
2013-06-06 20:56 ` [PATCH 1/2] m68k/amiga - Zorro ESP SCSI Makefile/Kconfig support Michael Schmitz
2013-06-06 20:56 ` [PATCH 2/2] m68k/amiga - Zorro ESP: convert old driver to ESP core Michael Schmitz
2013-08-15 21:40 ` [PATCH 0/2] Experimental Amiga Zorro ESP driver Tuomas Vainikka
2013-08-16 19:01 ` Tuomas Vainikka
2013-08-17 1:49 ` Michael Schmitz
2013-08-17 11:33 ` Tuomas Vainikka
2013-08-18 2:05 ` Michael Schmitz
2013-08-18 8:23 ` Geert Uytterhoeven
2013-08-18 8:58 ` Michael Schmitz
2013-08-18 9:10 ` Geert Uytterhoeven
2013-08-19 8:48 ` Michael Schmitz
2013-08-19 11:47 ` Tuomas Vainikka [this message]
2013-08-19 12:01 ` Geert Uytterhoeven
2013-08-19 20:46 ` Tuomas Vainikka
2013-08-20 9:36 ` Michael Schmitz
2013-08-20 10:00 ` Tuomas Vainikka
2013-08-22 20:34 ` Michael Schmitz
2013-08-31 10:37 ` Tuomas Vainikka
2013-09-10 21:13 ` Tuomas Vainikka
2013-09-11 10:12 ` Michael Schmitz
2013-09-11 13:08 ` Tuomas Vainikka
2013-09-11 20:14 ` Tuomas Vainikka
2013-09-26 13:44 ` Michael Schmitz
2013-09-26 14:04 ` Tuomas Vainikka
2013-09-27 9:17 ` Michael Schmitz
2013-09-11 14:48 ` Geert Uytterhoeven
2013-09-12 15:36 ` esp_scsi QTAG in FAS216 (was Re: [PATCH 0/2] Experimental Amiga Zorro ESP driver) Tuomas Vainikka
2013-09-26 13:50 ` Michael Schmitz
2014-04-04 20:28 ` esp_scsi QTAG in FAS216 David Miller
2014-04-06 20:33 ` Michael Schmitz
2014-04-07 3:39 ` David Miller
2014-04-10 14:31 ` Kars de Jong
2014-04-11 1:47 ` Michael Schmitz
2014-04-13 14:47 ` Kars de Jong
2014-04-13 22:38 ` Michael Schmitz
2014-04-14 2:14 ` David Miller
2014-04-14 5:05 ` Tuomas Vainikka
2014-04-14 8:51 ` Michael Schmitz
2014-05-25 8:56 ` Geert Uytterhoeven
2014-05-26 1:15 ` Michael Schmitz
2014-04-14 9:01 ` Michael Schmitz
2014-05-04 11:41 ` Tuomas Vainikka
2016-10-28 21:54 ` Finn Thain
2016-10-30 2:33 ` Finn Thain
2016-10-31 8:03 ` Michael Schmitz
2016-10-31 18:54 ` Michael Schmitz
2016-10-31 23:47 ` Finn Thain
2016-11-01 7:09 ` Michael Schmitz
2016-11-01 7:23 ` Finn Thain
2013-08-18 9:14 ` [PATCH 0/2] Experimental Amiga Zorro ESP driver Tuomas Vainikka
2013-08-18 9:42 ` Geert Uytterhoeven
2013-08-18 12:25 ` Tuomas Vainikka
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