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| 07:00.27 | slamm_jayesh | anyone there ? |
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| 16:00.58 | luffe48 | god damn this kernel debugging stuff has a learning curve |
| 16:01.28 | luffe48 | i got my own kernel to boot on my mpc8343 based nas |
| 16:02.38 | luffe48 | even got the sata controller to work after fiddling with the pci stuff in the device tree |
| 16:03.18 | luffe48 | now i just need to get the ethernet controller to stop complaining and start sending some packets |
| 16:06.30 | luffe48 | can't really figure out what's going on here: fsl-gianfar e0024000.ethernet: DMA-API: device driver failed to check map error |
| 16:07.04 | luffe48 | that's from dmesg |
| 16:23.43 | phonkane | luffe48: isn't that just a warning? |
| 16:24.10 | phonkane | though it might have something to do with your problem :) |
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| 16:43.46 | luffe48 | it's followed by a TRAP 700 (program check exception) |
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| 16:44.38 | luffe48 | but i can't really figure out if the "failed to check map error" is just a code quality related warning or what |
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| 16:49.50 | phonkane | it sounds like that, gianfar does not call dma_mapping_error() after dma_map_{page,single}() |
| 16:51.20 | phonkane | read (and fall asleep): Documentation/DMA-API-HOWTO.txt |
| 16:51.29 | luffe48 | i tried, i got a headache |
| 16:51.41 | phonkane | and i still have headache |
| 16:51.51 | phonkane | it never goes away |
| 16:52.48 | luffe48 | the annoying thing is, i have the kernel sources for the original kernel for the board, but it's from 2005, so a lot have changed |
| 16:53.26 | luffe48 | i thought i'd just dig out adresses and interrupts, put that in a device tree and be on my way |
| 16:53.35 | luffe48 | so far it's sort of worked |
| 16:53.54 | luffe48 | but there's something funky going on with this ethernet controller |
| 16:54.36 | luffe48 | and there's a bunch of weird little changes in the gianfar.c in the old kernel |
| 16:54.48 | luffe48 | that doesn't seem to translate 1:1 to the new kernel |
| 16:55.24 | luffe48 | of course, none of the changes are commented :( |
| 16:56.16 | phonkane | so you are using gianfar driver from 2005 in a new kernel? |
| 16:56.31 | luffe48 | no, but if i don't get this to work i'll probably try that |
| 16:57.12 | luffe48 | it just seems to almost work, even the phy is recognized, and i get an interrupt when i try to send a packet and everything |
| 16:57.21 | luffe48 | but this dma stuff just seems to put a stop to it |
| 17:09.53 | luffe48 | wait - if the "failed to check map error" is just a warning, is the following exception with backtrace just help to fix that? |
| 17:10.03 | luffe48 | then all that's just a red herring |
| 17:10.27 | luffe48 | why the hell don't i have ethernet then? |
| 17:10.54 | luffe48 | eff this |
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| 17:15.17 | phonkane | i think you are onto something now |
| 17:15.34 | phonkane | perhaps you can prove with logic there is no problem after all |
| 17:16.33 | luffe48 | lol |
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| 17:23.58 | luffe48 | yeah, if i remove dma-api debugging it just goes away |
| 17:24.08 | luffe48 | still not getting any packets through though |
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| 18:47.58 | flughafen | question, I am trying to build gcc/g++ for arm-elf on archlinux, so while I got the pcakage to install/compile, it seems to be missing the c++ libs, like basic iostream, do I need to compile a libstdc++ package? |
| 18:50.23 | flughafen | or did I miss a config option? https://aur.archlinux.org/packages/ar/arm-elf-gcc-base/PKGBUILD <- the file used for compiling... I edited it to add c++ |
| 20:18.22 | luffe48 | weird - with linux-3.4.75 my ethernet seems to work fine |
| 20:18.54 | luffe48 | it seems i'm using some crustier parts of the kernel than i'm used to |
| 20:24.18 | luffe48 | just for the record, i think it was related to some tbi-phy not being recognized in the new kernel |
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