Às 6:44 PM de 1/5/2017, Nathan Sullivan escreveu: > On Thu, Jan 05, 2017 at 06:33:53PM +0000, Joao Pinto wrote: >> Hi, >> >> Às 6:28 PM de 1/5/2017, Niklas Cassel escreveu: >>> On 01/04/2017 05:38 PM, Nathan Sullivan wrote: >>>> On Tue, Dec 20, 2016 at 05:34:34PM +0100, Ralf Baechle wrote: >>>>> On Fri, Dec 02, 2016 at 09:42:09AM -0600, Nathan Sullivan wrote: >>>>>> Date: Fri, 2 Dec 2016 09:42:09 -0600 >>>>>> From: Nathan Sullivan <nathan.sullivan@xxxxxx> >>>>>> To: ralf@xxxxxxxxxxxxxx, mark.rutland@xxxxxxx, robh+dt@xxxxxxxxxx >>>>>> CC: linux-mips@xxxxxxxxxxxxxx, devicetree@xxxxxxxxxxxxxxx, >>>>>> linux-kernel@xxxxxxxxxxxxxxx, Nathan Sullivan <nathan.sullivan@xxxxxx> >>>>>> Subject: [PATCH] MIPS: NI 169445 board support >>>>>> Content-Type: text/plain >>>>>> >>>>>> Support the National Instruments 169445 board. >>>>> Nathan, >>>>> >>>>> I assume you're going to repost the changes Rob asked for in >>>>> https://urldefense.proofpoint.com/v2/url?u=https-3A__patchwork.linux-2Dmips.org_patch_14641_-2326924&d=DgICaQ&c=DPL6_X_6JkXFx7AXWqB0tg&r=s2fO0hii0OGNOv9qQy_HRXy-xAJUD1NNoEcc3io_kx0&m=5p7f9dIkvVVK4UFHimMpezq5NwIJfUpd08c-Zk4_c6c&s=_JwSwe4VFYtxV1tcYt6Z8r4hJX0xfoGhCixygUxlg5s&e= and resubmit? >>>>> >>>>> Thanks, >>>>> >>>>> Ralf >>>> Hmm, I found the issue with the generic MIPS config and dwc_eth_qos. The NIC >>>> driver attempts to cache align a descriptor ring using the ___cacheline_aligned >>>> attribute on the descriptor struct, in combination with a "skip" feature in >>>> hardware. However, the skip feature only has a three bit field, and the generic >>>> MIPS config selects MIPS_L1_CACHE_SHIFT_7. So, the line size is 128, and with a >>>> 64-bit bus, that means the NIC descriptor skip field would need to be set to >>>> 14 to align the 16-byte descriptors... >>>> >>>> I guess it makes sense for a generic MIPS kernel to align everything for 128 byte >>>> cache lines, and for me to fix the dwc_eth_qos driver to handle cases where the >>>> line size is too big for the hardware skip feature, right? >>> >>> I don't know if you've been following the discussion regarding >>> dwc_eth_qos on netdev, but Joao Pinto from Synopsys is >>> planning on removing the driver (since the stmmac driver >>> now supports the same version of the IP, together with older >>> versions of the IP). >>> >>> Since device tree bindings are treated as an ABI, >>> Joao has implemented a glue layer for stmmac that parses >>> the dwc_eth_qos binding, but uses stmmac under the hood. >>> >>> You can use any of the bindings, but since the dwc_eth_qos >>> binding will be marked as deprecated, you might want to >>> consider moving to the stmmac binding. >> >> A patch set to port dwc_eth_qos to stmmac is at this moment under review: >> >> https://urldefense.proofpoint.com/v2/url?u=http-3A__patchwork.ozlabs.org_patch_711428_&d=DgIDAw&c=DPL6_X_6JkXFx7AXWqB0tg&r=s2fO0hii0OGNOv9qQy_HRXy-xAJUD1NNoEcc3io_kx0&m=E0wkLvWGNBx49Zdq7Jw5toxfcwI9r7MBBbcTea28AL0&s=P71GK8K8tyGjenB4tDVyKfCuZF9cZiFBBpdeX8PQtEM&e= >> https://urldefense.proofpoint.com/v2/url?u=http-3A__patchwork.ozlabs.org_patch_711438_&d=DgIDAw&c=DPL6_X_6JkXFx7AXWqB0tg&r=s2fO0hii0OGNOv9qQy_HRXy-xAJUD1NNoEcc3io_kx0&m=E0wkLvWGNBx49Zdq7Jw5toxfcwI9r7MBBbcTea28AL0&s=fj787JEefx7cddQAe7g604tMtvDlVzYj3kQKy80Gym0&e= >> https://urldefense.proofpoint.com/v2/url?u=http-3A__patchwork.ozlabs.org_patch_711439_&d=DgIDAw&c=DPL6_X_6JkXFx7AXWqB0tg&r=s2fO0hii0OGNOv9qQy_HRXy-xAJUD1NNoEcc3io_kx0&m=E0wkLvWGNBx49Zdq7Jw5toxfcwI9r7MBBbcTea28AL0&s=Cyy9ySM6LNgkQ07OsIYE8KnD1h1DruhCKLxH6W3_1VY&e= >> >> Niklas has tested it and it works well, so after the patches are upstreamed the >> dwc_eth_qos will be removed as agreed with Lars. >> >> Thanks. >> > > Thanks for the heads up, I'll wait, adjust my bindings and retest then. Great! Thanks! > > Nathan > >>> >>>> >>>> Thanks, >>>> >>>> Nathan >>>> >>>> >>> >>
