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Groups > linux.kernel > #1276007
| From | Finn Thain <fthain@telegraphics.com.au> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: [PATCH 00/71] More fixes, cleanup and modernization for NCR5380 drivers |
| Date | 2015-11-24 02:30 +0100 |
| Message-ID | <qyaAH-1iQ-13@gated-at.bofh.it> (permalink) |
| References | <qw6Bc-vx-5@gated-at.bofh.it> <qxg5r-5GU-11@gated-at.bofh.it> <qxpV8-3RO-15@gated-at.bofh.it> <qy8fw-89o-17@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
On Mon, 23 Nov 2015, Ondrej Zary wrote: > > PDMA seems to be broken in multiple ways. NCR5380_pread cannot process > less than 128 bytes. In fact, 53C400 datasheet says that it's HW > limitation: non-modulo-128-byte transfers should use PIO. > > Adding > transfersize = round_down(transfersize, 128); > to generic_NCR5380_dma_xfer_len() improves the situation a bit. > > After modprobe, some small reads (8, 4, 24 and 64 bytes) are done using > PIO, then eight 512-byte reads using PDMA and then it fails on a > 254-byte read. First 128 bytes are read using PDMA and the next PDMA > operation hangs waiting forever for the host buffer to be ready. > A 128-byte PDMA receive followed by 126-byte PDMA receive? I don't see how that is possible given round_down(126, 128) == 0. Was this the actual 'len' argument to NCR5380_pread() in g_NCR5380.c? BTW, I presume that FLAG_NO_DMA_FIXUPS was set (which is the case if you pass ncr_53c400=1 option with modprobe). Otherwise you could see PDMA IO sizes like 127 etc. -- -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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[PATCH 00/71] More fixes, cleanup and modernization for NCR5380 drivers Finn Thain <fthain@telegraphics.com.au> - 2015-11-18 10:20 +0100
[PATCH 04/71] ncr5380: Remove more pointless macros Finn Thain <fthain@telegraphics.com.au> - 2015-11-18 10:30 +0100
Re: [PATCH 00/71] More fixes, cleanup and modernization for NCR5380 drivers Ondrej Zary <linux@rainbow-software.org> - 2015-11-18 12:40 +0100
Re: [PATCH 00/71] More fixes, cleanup and modernization for NCR5380 drivers Finn Thain <fthain@telegraphics.com.au> - 2015-11-19 03:30 +0100
Re: [PATCH 00/71] More fixes, cleanup and modernization for NCR5380 drivers Michael Schmitz <schmitzmic@gmail.com> - 2015-11-19 04:00 +0100
Re: [PATCH 00/71] More fixes, cleanup and modernization for NCR5380 drivers Ondrej Zary <linux@rainbow-software.org> - 2015-11-19 08:50 +0100
Re: [PATCH 00/71] More fixes, cleanup and modernization for NCR5380 drivers Ondrej Zary <linux@rainbow-software.org> - 2015-11-20 00:00 +0100
Re: [PATCH 00/71] More fixes, cleanup and modernization for NCR5380 drivers Finn Thain <fthain@telegraphics.com.au> - 2015-11-20 02:50 +0100
Re: [PATCH 00/71] More fixes, cleanup and modernization for NCR5380 drivers Finn Thain <fthain@telegraphics.com.au> - 2015-11-20 08:30 +0100
Re: [PATCH 00/71] More fixes, cleanup and modernization for NCR5380 drivers Christoph Hellwig <hch@infradead.org> - 2015-11-20 08:40 +0100
Re: [PATCH 00/71] More fixes, cleanup and modernization for NCR5380 drivers Finn Thain <fthain@telegraphics.com.au> - 2015-11-20 09:20 +0100
Re: [PATCH 00/71] More fixes, cleanup and modernization for NCR5380 drivers Ondrej Zary <linux@rainbow-software.org> - 2015-11-20 10:20 +0100
Re: [PATCH 00/71] More fixes, cleanup and modernization for NCR5380 drivers Christoph Hellwig <hch@infradead.org> - 2015-11-20 11:10 +0100
Re: [PATCH 00/71] More fixes, cleanup and modernization for NCR5380 drivers Finn Thain <fthain@telegraphics.com.au> - 2015-11-20 12:00 +0100
Re: [PATCH 00/71] More fixes, cleanup and modernization for NCR5380 drivers Christoph Hellwig <hch@infradead.org> - 2015-11-20 12:50 +0100
Re: [PATCH 00/71] More fixes, cleanup and modernization for NCR5380 drivers Ondrej Zary <linux@rainbow-software.org> - 2015-11-20 12:50 +0100
Re: [PATCH 00/71] More fixes, cleanup and modernization for NCR5380 drivers Geert Uytterhoeven <geert@linux-m68k.org> - 2015-11-20 13:30 +0100
Re: [PATCH 00/71] More fixes, cleanup and modernization for NCR5380 drivers Ondrej Zary <linux@rainbow-software.org> - 2015-11-20 13:50 +0100
Re: [PATCH 00/71] More fixes, cleanup and modernization for NCR5380 drivers Ondrej Zary <linux@rainbow-software.org> - 2015-11-20 08:40 +0100
Re: [PATCH 00/71] More fixes, cleanup and modernization for NCR5380 drivers Ondrej Zary <linux@rainbow-software.org> - 2015-11-20 19:30 +0100
Re: [PATCH 00/71] More fixes, cleanup and modernization for NCR5380 drivers Finn Thain <fthain@telegraphics.com.au> - 2015-11-21 03:10 +0100
Re: [PATCH 00/71] More fixes, cleanup and modernization for NCR5380 drivers Ondrej Zary <linux@rainbow-software.org> - 2015-11-21 14:10 +0100
Re: [PATCH 00/71] More fixes, cleanup and modernization for NCR5380 drivers Ondrej Zary <linux@rainbow-software.org> - 2015-11-22 00:10 +0100
Re: [PATCH 00/71] More fixes, cleanup and modernization for NCR5380 drivers Finn Thain <fthain@telegraphics.com.au> - 2015-11-22 00:40 +0100
Re: [PATCH 00/71] More fixes, cleanup and modernization for NCR5380 drivers Ondrej Zary <linux@rainbow-software.org> - 2015-11-24 00:00 +0100
Re: [PATCH 00/71] More fixes, cleanup and modernization for NCR5380 drivers Finn Thain <fthain@telegraphics.com.au> - 2015-11-24 02:30 +0100
Re: [PATCH 00/71] More fixes, cleanup and modernization for NCR5380 drivers Ondrej Zary <linux@rainbow-software.org> - 2015-11-24 09:10 +0100
Re: [PATCH 00/71] More fixes, cleanup and modernization for NCR5380 drivers Finn Thain <fthain@telegraphics.com.au> - 2015-11-24 10:20 +0100
Re: [PATCH 00/71] More fixes, cleanup and modernization for NCR5380 drivers Ondrej Zary <linux@rainbow-software.org> - 2015-11-24 13:10 +0100
Re: [PATCH 00/71] More fixes, cleanup and modernization for NCR5380 drivers Ondrej Zary <linux@rainbow-software.org> - 2015-11-24 19:10 +0100
Re: [PATCH 00/71] More fixes, cleanup and modernization for NCR5380 drivers Ondrej Zary <linux@rainbow-software.org> - 2015-11-24 22:50 +0100
Re: [PATCH 00/71] More fixes, cleanup and modernization for NCR5380 drivers Finn Thain <fthain@telegraphics.com.au> - 2015-11-25 03:20 +0100
Re: [PATCH 00/71] More fixes, cleanup and modernization for NCR5380 drivers Ondrej Zary <linux@rainbow-software.org> - 2015-11-25 10:10 +0100
Re: [PATCH 00/71] More fixes, cleanup and modernization for NCR5380 drivers Finn Thain <fthain@telegraphics.com.au> - 2015-11-25 13:00 +0100
Re: [PATCH 00/71] More fixes, cleanup and modernization for NCR5380 drivers Ondrej Zary <linux@rainbow-software.org> - 2015-11-26 00:10 +0100
[PATCH 72/71] ncr5380: Fix pseudo-DMA Ondrej Zary <linux@rainbow-software.org> - 2015-11-25 22:40 +0100
[RFC PATCH 73/71] ncr5380: Use runtime register mapping Ondrej Zary <linux@rainbow-software.org> - 2015-11-29 10:50 +0100
Re: [RFC PATCH 73/71] ncr5380: Use runtime register mapping Finn Thain <fthain@telegraphics.com.au> - 2015-11-30 13:00 +0100
[RFC PATCH 74/71] ncr5380: Enable PDMA for NCR53C400A Ondrej Zary <linux@rainbow-software.org> - 2015-11-29 10:50 +0100
Re: [RFC PATCH 74/71] ncr5380: Enable PDMA for NCR53C400A Finn Thain <fthain@telegraphics.com.au> - 2015-11-30 13:00 +0100
Re: [RFC PATCH 74/71] ncr5380: Enable PDMA for NCR53C400A Finn Thain <fthain@telegraphics.com.au> - 2015-11-30 13:10 +0100
Re: [RFC PATCH 74/71] ncr5380: Enable PDMA for NCR53C400A Ondrej Zary <linux@rainbow-software.org> - 2015-11-30 14:50 +0100
[RFC PATCH 75/71] ncr5380: Remove FLAG_DTC3181E Ondrej Zary <linux@rainbow-software.org> - 2015-11-29 11:10 +0100
Re: [RFC PATCH 75/71] ncr5380: Remove FLAG_DTC3181E Finn Thain <fthain@telegraphics.com.au> - 2015-11-30 06:00 +0100
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