Re: [Xenomai-core] rtdm_iomap_to_user() with PowerPC
Jan Kiszka wrote: Markus Osterried wrote: Sorry for being intrusive. I've already done a quick and dirty bug fix, so final bug fix is not urgent. Just wanted to know about time schedule. At least 2.4 is near, but I guess another 2.3 release will follow as well (due to recently accumulated fixes). So the time is right to pick this up again. And although Philippe said he would fix this one on his own, this does not have to mean no one else would be able to provide an equivalent fix as well and he wouldn't be happy to save the otherwise required time... :) Indeed. Quite frankly, the bug report is patiently pending in my queue, so it was not lost, but I just had no time to address this seriously. Have everything converge to roll out 2.4 drains much of my Xenomai time, so I tend to put the non-critical issues on the back burner for now, especially if they might break things in subtle ways. Since there is a work around for this issue, and the final fix may make it to any stable branch once 2.4 is out, I've postponed the latter. -- Philippe. ___ Xenomai-core mailing list Xenomai-core@gna.org https://mail.gna.org/listinfo/xenomai-core
Re: [Xenomai-core] rtdm_iomap_to_user() with PowerPC
Markus Osterried wrote: Sorry for being intrusive. I've already done a quick and dirty bug fix, so final bug fix is not urgent. Just wanted to know about time schedule. At least 2.4 is near, but I guess another 2.3 release will follow as well (due to recently accumulated fixes). So the time is right to pick this up again. And although Philippe said he would fix this one on his own, this does not have to mean no one else would be able to provide an equivalent fix as well and he wouldn't be happy to save the otherwise required time... :) Jan -- Siemens AG, Corporate Technology, CT SE 2 Corporate Competence Center Embedded Linux ___ Xenomai-core mailing list Xenomai-core@gna.org https://mail.gna.org/listinfo/xenomai-core
[Xenomai-core] rtdm_iomap_to_user() with PowerPC
Hello, two months ago I reported a problem with rtdm_iomap_to_user(). Philippe acknowledged the problem and promised to submit a bug fix. Unfortunately, till now I don't have seen this bug fix, or have overlooked it? Can you please give me a hint about the roadmap? Thanks. Markus ___ Xenomai-core mailing list Xenomai-core@gna.org https://mail.gna.org/listinfo/xenomai-core
Re: [Xenomai-core] rtdm_iomap_to_user() with PowerPC
Sorry for being intrusive. I've already done a quick and dirty bug fix, so final bug fix is not urgent. Just wanted to know about time schedule. Markus -Original Message- From: Jan Kiszka [mailto:[EMAIL PROTECTED] Sent: Mittwoch, 7. November 2007 15:46 To: Markus Osterried Cc: Philippe Gerum; Xenomai-core@gna.org Subject: Re: [Xenomai-core] rtdm_iomap_to_user() with PowerPC Markus Osterried wrote: Hello, two months ago I reported a problem with rtdm_iomap_to_user(). Philippe acknowledged the problem and promised to submit a bug fix. Unfortunately, till now I don't have seen this bug fix, or have overlooked it? Please post your bugs to our bugtracker on gna.org if you feel like it is getting/already got lost. Everyone is busy, and I'm afraid this particular issue remained unfixed unintentionally. Can you please give me a hint about the roadmap? This is surely a must-fix for both 2.4 and the next 2.3 releases, we are only lacking the patch. Unless Philippe is able to come out with something over the next, say, two days, I would suggest to develop a fix along his original suggestions on your own. As far as I understood, we need an arch-specific wrapper for io-remapping in include/asm-powerps/wrappers.h and awareness for this specific solution in asm-generic/wrappers.h. Jan -- Siemens AG, Corporate Technology, CT SE 2 Corporate Competence Center Embedded Linux ___ Xenomai-core mailing list Xenomai-core@gna.org https://mail.gna.org/listinfo/xenomai-core
Re: [Xenomai-core] rtdm_iomap_to_user() with PowerPC
Markus Osterried wrote: Hello, two months ago I reported a problem with rtdm_iomap_to_user(). Philippe acknowledged the problem and promised to submit a bug fix. Unfortunately, till now I don't have seen this bug fix, or have overlooked it? Please post your bugs to our bugtracker on gna.org if you feel like it is getting/already got lost. Everyone is busy, and I'm afraid this particular issue remained unfixed unintentionally. Can you please give me a hint about the roadmap? This is surely a must-fix for both 2.4 and the next 2.3 releases, we are only lacking the patch. Unless Philippe is able to come out with something over the next, say, two days, I would suggest to develop a fix along his original suggestions on your own. As far as I understood, we need an arch-specific wrapper for io-remapping in include/asm-powerps/wrappers.h and awareness for this specific solution in asm-generic/wrappers.h. Jan -- Siemens AG, Corporate Technology, CT SE 2 Corporate Competence Center Embedded Linux ___ Xenomai-core mailing list Xenomai-core@gna.org https://mail.gna.org/listinfo/xenomai-core
[Xenomai-core] rtdm_iomap_to_user() with PowerPC
Hello, I want to use rtdm_iomap_to_user() to map our device registers to user space. But this doesn't work, our application just crashes when I read from the mapped registers. When I insert the line vma-vm_page_prot = phys_mem_access_prot(filp, paddrPAGE_SHIFT, size, vma-vm_page_prot); in rtdm_mmap_buffer() just before calling xnarch_remap_io_page_range() it works fine. This is just like it is done in /drivers/char/mem.c and in /drivers/video/fbmem.c. But I think this is architecture and kernel version dependent and I don't know whether rtdm_mmap_buffer() is the right place. I use Xenomai 2.3.1 and Linux 2.6.18 with PowerPC CPU. What is the best solution? Everyone else seen this problem? Thanks Markus ___ Xenomai-core mailing list Xenomai-core@gna.org https://mail.gna.org/listinfo/xenomai-core
Re: [Xenomai-core] rtdm_iomap_to_user() with PowerPC
Markus Osterried (BA/EDD) wrote: Hello, I want to use rtdm_iomap_to_user() to map our device registers to user space. But this doesn't work, our application just crashes when I read from the mapped registers. When I insert the line vma-vm_page_prot = phys_mem_access_prot(filp, paddrPAGE_SHIFT, size, vma-vm_page_prot); in rtdm_mmap_buffer() just before calling xnarch_remap_io_page_range() it works fine. [hint: using diff -up helps the reader to quickly localise your changes.] This is just like it is done in /drivers/char/mem.c and in /drivers/video/fbmem.c. But I think this is architecture and kernel version dependent and I don't know whether rtdm_mmap_buffer() is the right place. I use Xenomai 2.3.1 and Linux 2.6.18 with PowerPC CPU. What is the best solution? Everyone else seen this problem? Providing phys_mem_access_prot() services for xnarch_remap_io_page_range() looks like it is actually required - practically at least for PPC, but I can't tell immediately if there aren't other yet unnoticed side effect of skipping it. Hmm, can we extend xnarch_remap_io_page_range()/ wrap_remap_io_page_range() to take care of this as well? Suggestions (ie. patches) welcome! Jan signature.asc Description: OpenPGP digital signature ___ Xenomai-core mailing list Xenomai-core@gna.org https://mail.gna.org/listinfo/xenomai-core
