Hi Cloudy, On Sat, Jun 30, 2012 at 03:35:48PM +0800, cloudy.linux wrote: > Although I had no idea about what's wrong, I looked in the functional > errata (again), And I found what's attached (The doc I got from Internet > was a protected PDF, that's why I had to use screen capture). > Is this relevant? Or maybe you have already addressed this in the code > (I can just read some simple C code)?
To me, doesn't read like a real problem, just a guideline for doing things. From the output you sent me in your previous mail, I'd rather suspect fetching the first descriptor to be faulty: the next descriptor pointer contains the first descriptor's DMA address, all other fields are zero (this is the situation when triggering the engine, as on kirkwood all I have to do is fill the first descriptor's address in and TDMA does the rest) and IDMA triggers an address miss interrupt at address 0x0. So probably IDMA starts up and tries to look up decoding windows for he up the still zero source and destination addresses. According to the specs, when using the next descriptor field for fetching the first descriptor one also has to set the FETCH_ND field in DMA_CTRL register, also for TDMA. Though, on my hardware the only working configuration is the implemented one, i.e. without FETCH_ND being set. I have implemented a separate approach just for IDMA, which instead of just writing the first descriptor's address to NEXT_DESC does: 1. clear CTRL_ENABLE bit 2. fill NEXT_DESC 3. set CTRL_ENABLE along with FETCH_ND hopefully this is the way to go on Orion. Since Marvell's BSP doesn't implement *DMA attached to CESA, I have nowhere to look this up. Getting it right for TDMA was just a matter of trial and error. My public git got a few updates, including the code described above. Would be great if you could give it a try. Greetings, Phil Phil Sutter Software Engineer -- VNet Europe GmbH Mainzer Str. 43 55411 Bingen am Rhein Germany Management Buy-Out at Viprinet - please read http://www.viprinet.com/en/mbo Management Buy-Out bei Viprinet - bitte lesen Sie http://www.viprinet.com/de/mbo Phone/Zentrale: +49 6721 49030-0 Direct line/Durchwahl: +49 6721 49030-134 Fax: +49 6721 49030-109 phil.sut...@viprinet.com http://www.viprinet.com Registered office/Sitz der Gesellschaft: Bingen am Rhein, Germany Commercial register/Handelsregister: Amtsgericht Mainz HRB44090 CEO/Geschäftsführer: Simon Kissel -- To unsubscribe from this list: send the line "unsubscribe linux-crypto" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
