Messages in this thread | | | Subject | Re: use generic DMA mapping code in powerpc V4 | From | Christian Zigotzky <> | Date | Thu, 29 Nov 2018 13:05:23 +0100 |
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On 28 November 2018 at 12:05PM, Michael Ellerman wrote: > Christoph Hellwig <hch@lst.de> writes: > >> Any comments? I'd like to at least get the ball moving on the easy >> bits. > Nothing specific yet. > > I'm a bit worried it might break one of the many old obscure platforms > we have that aren't well tested. > > There's not much we can do about that, but I'll just try and test it on > everything I can find. > > Is the plan that you take these via the dma-mapping tree or that they go > via powerpc? > > cheers > Hi All,
I compiled a test kernel from the following Git today.
http://git.infradead.org/users/hch/misc.git/shortlog/refs/heads/powerpc-dma.4
Command: git clone git://git.infradead.org/users/hch/misc.git -b powerpc-dma.4 a
Unfortunately I get some DMA error messages and the PASEMI ethernet doesn't work anymore.
[ 367.627623] pci 0000:00:1a.0: dma_direct_map_page: overflow 0x000000026bcb5002+110 of device mask ffffffff bus mask 0 [ 367.627631] pci 0000:00:1a.0: dma_direct_map_page: overflow 0x000000026bcb5002+110 of device mask ffffffff bus mask 0 [ 367.627639] pci 0000:00:1a.0: dma_direct_map_page: overflow 0x000000026bcb5002+110 of device mask ffffffff bus mask 0 [ 367.627647] pci 0000:00:1a.0: dma_direct_map_page: overflow 0x000000026bcb5002+110 of device mask ffffffff bus mask 0 [ 367.627655] pci 0000:00:1a.0: dma_direct_map_page: overflow 0x000000026bcb5002+110 of device mask ffffffff bus mask 0 [ 367.627686] pci 0000:00:1a.0: dma_direct_map_page: overflow 0x000000026bcb5002+110 of device mask ffffffff bus mask 0 [ 367.628418] pci 0000:00:1a.0: dma_direct_map_page: overflow 0x000000026bcb5002+110 of device mask ffffffff bus mask 0 [ 367.628505] pci 0000:00:1a.0: dma_direct_map_page: overflow 0x000000026bcb5002+110 of device mask ffffffff bus mask 0 [ 367.628592] pci 0000:00:1a.0: dma_direct_map_page: overflow 0x000000026bcb5002+110 of device mask ffffffff bus mask 0 [ 367.629324] pci 0000:00:1a.0: dma_direct_map_page: overflow 0x000000026bcb5002+110 of device mask ffffffff bus mask 0 [ 367.629417] pci 0000:00:1a.0: dma_direct_map_page: overflow 0x000000026bcb5002+110 of device mask ffffffff bus mask 0 [ 367.629495] pci 0000:00:1a.0: dma_direct_map_page: overflow 0x000000026bcb5002+110 of device mask ffffffff bus mask 0 [ 367.629589] pci 0000:00:1a.0: dma_direct_map_page: overflow 0x000000026bcb5002+110 of device mask ffffffff bus mask 0
[ 430.424732]pasemi_mac: rcmdsta error: 0x04ef3001
I tested this kernel with the Nemo board (CPU: PWRficient PA6T-1682M). The PASEMI ethernet works with the RC4 of kernel 4.20.
Cheers, Christian
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