On 11/18/2016 08:24 AM, Jaehoon Chung wrote: > Hi, > > Added Marek as USB maintainer. > > On 11/17/2016 01:21 PM, Dongwoo Lee wrote: >> The transfer request exceeding 4032KB (the maximum number of TRBs per >> TD * the maximum size of transfer buffer on TRB) fails on xhci host >> with timed out error or babble error state. This failure occurs when >> accessing large files on USB mass-storage. Currently with xhci as well >> as ehci host, the driver requests maximum 30MB (65536 blks * 512 byte) >> to storage at once. However, xhci cannot handle this request because >> of the reason mentioned above, even though ehci can handle this. Thus, >> transfer request larger than this size should be splitted in order to >> limit the length of data in a single TD. >> >> Even though the single request is splitted into multiple requests, >> the transfer speed has affected insignificantly in comparison with >> ehci host: 22.6 MB/s on ehci and 22.3 MB/s on xhci for 100MB tranfer. > > I don't have USB knowledge..So i wonder that this is correct way. > Have other guys ever seen the similar issue?
Is this a controller limitation ? btw can you fix your mailer to NOT send HTML email to the list? -- Best regards, Marek Vasut _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot