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Ard Biesheuvel <ard.biesheuvel at linaro.org> writes: > The 100c08 scratch page is mapped using dma_map_page() before the TTM > layer has had a chance to set the DMA mask. This means we are still > running with the default of 32 when this code executes, and this causes > problems for...

Dear all, I have imported a dataset from Stata using the foreign package. The original data contain French characters such as è and ç . After importing, string variables containing names of French departments have changed. E.g. Ardèche became Ard\x8fche. I would like to ask how I could plot these changed strings, since now the strings with special characters fail to be printed in the plot (either using plot() or ggplot2()). I have googled for solutions, but actually find it hard to determine whether I should change my R setu...

Hey Ard, It seems that Ben already committed a similar patch to his tree (see [0]). I do not know whether he is planning to have it part of a pull request of fixes for 4.15. Best regards, Pierre [0]: https://github.com/skeggsb/nouveau/commit/9068f1df2394f0e4ab2b2a28cac06b462fe0a0aa On 2017-12-18 — 09:2...

...efcount_inc_not_zero(&iobj->maps)) { ... refcount_inc(&iobj->maps); } i.e., it calls refcount_inc() to increment the refcount when it is known to be zero, which is explicitly forbidden by the API. Instead, use refcount_set() to set it to 1. Signed-off-by: Ard Biesheuvel <ard.biesheuvel at linaro.org> --- Apologies if this was already found and fixed. I don't usually follow the DRM or nouveau mailing lists. drivers/gpu/drm/nouveau/nvkm/subdev/instmem/nv50.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/n...

...running with the default of 32 when this code executes, and this causes problems for platforms with no memory below 4 GB (such as AMD Seattle) So move the dma_map_page() to the .init hook, and set the streaming DMA mask based on the MMU subdev parameters before performing the call. Signed-off-by: Ard Biesheuvel <ard.biesheuvel at linaro.org> --- I am sure there is a much better way to address this, but this fixes the problem I get on AMD Seattle with a GeForce 210 PCIe card: nouveau 0000:02:00.0: enabling device (0000 -> 0003) nouveau 0000:02:00.0: NVIDIA GT218 (0a8280b1) no...

...the Nouveau driver invokes the DMA API before setting the DMA mask. In both cases addressed here, these are simply static bidirectional mappings of scratch pages whose purpose is not well understood, and in most cases, it does not matter that these pages are always allocated below 4 GB even if the hardware can access memory much higher up. However, on platforms without any RAM below 4 GB, the preliminary DMA mask of 32 is preventing the nouveau driver from loading on GF100 and NV50 hardware with an error like the following one: nouveau 0000:02:00.0: enabling device (0000 -> 0003) nouve...

On 15 July 2016 at 07:52, Alexandre Courbot <gnurou at gmail.com> wrote: > On Fri, Jul 8, 2016 at 1:59 AM, Ard Biesheuvel > <ard.biesheuvel at linaro.org> wrote: >> The 100c08 scratch page is mapped using dma_map_page() before the TTM >> layer has had a chance to set the DMA mask. This means we are still >> running with the default of 32 when this code executes, and this causes &g...

...the Nouveau driver invokes the DMA API before setting the DMA mask. In both cases addressed here, these are simply static bidirectional mappings of scratch pages whose purpose is not well understood, and in most cases, it does not matter that these pages are always allocated below 4 GB even if the hardware can access memory much higher up. However, on platforms without any RAM below 4 GB, the preliminary DMA mask of 32 is preventing the nouveau driver from loading on GF100 and NV50 hardware with an error like the following one: nouveau 0000:02:00.0: enabling device (0000 -> 0003) nouve...

https://bugs.freedesktop.org/show_bug.cgi?id=100431 Bug ID: 100431 Summary: nv50: memory corruption due to use-after-free of dma_fence Product: xorg Version: unspecified Hardware: ARM OS: Linux (All) Status: NEW Severity: major Priority: medium Component: Driver/nouveau Assignee: nouveau at lists.freedesktop.org Reporter: ard.biesheuvel at linaro.org QA Contact: xorg-team at lists.x.org...

On Mon, Sep 26, 2016 at 9:32 PM, Ard Biesheuvel <ard.biesheuvel at linaro.org> wrote: > Some subdevices (i.e., fb/nv50.c and fb/gf100.c) map a scratch page using > dma_map_page() way before the TTM layer has had a chance to set the DMA > mask. This may prevent the driver from loading at all on platforms whose > syste...

...running with the default of 32 when this code executes, and this causes problems for platforms with no memory below 4 GB (such as AMD Seattle) So move the dma_map_page() to the .init hook, and set the streaming DMA mask based on the MMU subdev parameters before performing the call. Signed-off-by: Ard Biesheuvel <ard.biesheuvel at linaro.org> --- I am sure there is a much better way to address this, but this fixes the problem I get on AMD Seattle with a GeForce 210 PCIe card: nouveau 0000:02:00.0: enabling device (0000 -> 0003) nouveau 0000:02:00.0: NVIDIA GT218 (0a8280b1) nou...

On 7 October 2016 at 09:12, Alexandre Courbot <gnurou at gmail.com> wrote: > On Fri, Oct 7, 2016 at 12:49 AM, Ard Biesheuvel > <ard.biesheuvel at linaro.org> wrote: >> This v4 is now a 3 piece series (since v4), after Alexandre pointed out that >> both GF 100 and NV50 are affected by the same issue, and that a related issue >> has been solved already for Tegra in commit 9d0394c6bed5...

Hi Ard, the official nouveau tree is here: https://github.com/skeggsb/nouveau But ben usually takes care of everything if you post the patches on the ML. No idea what you discussed internally though, but alex also posts his suff here. On 16 Oct 2016 22:12, "Ard Biesheuvel" <ard.biesheuvel...

On 23 June 2016 at 11:55, Punit Agrawal <punit.agrawal at arm.com> wrote: > Ard Biesheuvel <ard.biesheuvel at linaro.org> writes: > >> The 100c08 scratch page is mapped using dma_map_page() before the TTM >> layer has had a chance to set the DMA mask. This means we are still >> running with the default of 32 when this code executes, and this causes &...

Hi, Just like Stegan earlier in this list, I wanted to report the same bug. I am not sure if it has changed already. -- <ard@telegraafnet.nl> Telegraaf Elektronische Media http://wwwijzer.nl http://leerquoten.monster.org/ http://www.faqs.org/rfcs/rfc1855.html Let your government know you value your freedom. Sign the petition: http://petition.eurolinux.org/

...or break when installed over top of the existing RubyUniversal 1.8.4 package from http://www.infurious.com/downloads/ which you may have already installed. Please provide feedback. I haven''t done much testing on these packages, but I''ve ensured this doesn''t wipe the hard disk or anything stupid like that. Permissions should be sane, and nothing should be installed world-writable. I''m deploying Ruby 1.8.5 to run the Puppet site configuration tool from http://www.reductivelabs.com/ Best Regards, -- Jeff McCune The Ohio State University Department of M...

Hi, Can somebody in the list tell me why sometimes when I do the TOP command I see more than one asterisk process ? Sometimes it appears and desappears again... Thanks, Ard.

On 8 December 2017 at 19:30, Ard Biesheuvel <ard.biesheuvel at linaro.org> wrote: > Commit be55287aa5b ("drm/nouveau/imem/nv50: embed nvkm_instobj directly > into nv04_instobj") introduced some new calls to the refcount api to > the nv50 mapping code. In one particular instance, it does the > following:...

On Fri, Jul 8, 2016 at 1:59 AM, Ard Biesheuvel <ard.biesheuvel at linaro.org> wrote: > The 100c08 scratch page is mapped using dma_map_page() before the TTM > layer has had a chance to set the DMA mask. This means we are still > running with the default of 32 when this code executes, and this causes > problems for p...

...running with the default of 32 when this code executes, and this causes problems for platforms with no memory below 4 GB (such as AMD Seattle) So move the dma_map_page() to the .init hook, and set the streaming DMA mask based on the MMU subdev parameters before performing the call. Signed-off-by: Ard Biesheuvel <ard.biesheuvel at linaro.org> --- I am sure there is a much better way to address this, but this fixes the problem I get on AMD Seattle with a GeForce 210 PCIe card: nouveau 0000:02:00.0: enabling device (0000 -> 0003) nouveau 0000:02:00.0: NVIDIA GT218 (0a8280b1) no...