Messages in this thread | | | Date | Mon, 05 Aug 2002 12:28:58 +0200 | From | Marcin Dalecki <> | Subject | Re: [PATCH] IDE udma_status = 0x76 and 2.5.30... |
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Uz.ytkownik Petr Vandrovec napisa?: > On 5 Aug 02 at 11:33, Marcin Dalecki wrote: > >>Uz.ytkownik Petr Vandrovec napisa?: >> >>> BTW, are there any TRM290 owners using 2.5.30? Old code set length to >>>((length >> 2) - 1) << 16, while new code does not have special handling >>>for TRM290. Or do I miss something? >> >>The new code is overwriting those values in the host controller driver >>itself. > > > Really? I'm not able to locate such overwrite in trm290.c. Are they hidden > somewhere else?
This should handle it:
hwif->seg_boundary_mask = 0xffffffff; > > Also BUG_ON() in udma_new_table is bogus. Change code: > > - u32 cur_len = sg_dma_len(sg) & 0xffff; > + u32 cur_len = sg_dma_len(sg); > > /* Delete this ... */ > BUG_ON(cur_len > ch->max_segment_size); > > *table++ = cpu_to_le32(cur_addr); > - *table++ = cpu_to_le32(cur_len); > + *table++ = cpu_to_le32(cur_len & 0xffff); > > Without first change BUG_ON will not trigger on any transfer: values > up to 0xFE00 are legal, and values over 0x10000 get cut down to > 0x0xxxx... > > Second change is needed only if we have some driver setting > max_segment_size to value > 0xffff: currently we do not have such driver, > default is 0xfe00, and value set by cs5530 is 0xfe00 too.
Well trm390 *does* set ->seg_boundary_mask.
>>Hmm... It is very well possible that the Toshiba doesn't like the >>fact that the intel chipsets cheat and do something like UDMA88 instead >>of UDMA100. Could you verify this by checking whatever forcing them to >>UDMA66 helps please? Vojtech? > > > It happens with UDMA0 too (and I tried slowest possible timming at > i845, and it still happens).
I'm more and more amanzed, why my system works at all...
> P.S.: Marcin, are you Marcin or Martin? MAINTAINERS says Martin, > but your replies state Marcin...
It doesn't really matter. Marcin is just the polish spelling of the name Martin. So choose whatever you want please.
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