From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from bay0-omc3-s18.bay0.hotmail.com (bay0-omc3-s18.bay0.hotmail.com [65.54.246.218]) by ozlabs.org (Postfix) with ESMTP id 39481679E9 for ; Thu, 30 Nov 2006 01:33:41 +1100 (EST) Message-ID: From: "Ming Liu" To: akonovalov@ru.mvista.com Subject: Some questions about the Xilinx Temac driver. Date: Wed, 29 Nov 2006 14:33:37 +0000 Mime-Version: 1.0 Content-Type: text/plain; charset=gb2312; format=flowed Cc: linuxppc-embedded@ozlabs.org List-Id: Linux on Embedded PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Dear Andrei, I have some questions about your xilinx Temac driver. If possible, please give me a hand on such confusing problems. 1. I am using the driver from http://source.mvista.com/~ank/paulus-powerpc/20060309/, and the IP cores of plb_temac and hard_temac whose hardware versions are 2.00a and 1.00a specifically. I know the newest versions of those hardwares are 3.00a and 3.00a. Is your driver support the 3.00a version hardware? Also, is the driver from http://source.mvista.com/~ank/paulus-powerpc/20060309/ the latest one for Xilinx Temac? If you have some updated version, please tell me the address. 2. Is that driver from the above address able to support SGDMA? In fact, I am testing the throughput of the Temac enet by my own little program which is very simple. In the program running on the board, the pseudo code looks just like this: for(;;){ select(); if(FD_ISSET()){ recvfrom(); } sendto(); } The program is just to receive packets from a pc and then transfer them back. But in this condition, the embedded PowerPC CPU is easily used by 100&. So I suspect that maybe the DMA is not running properly. Could you please say something about the DMA in your driver? Thanks a lot for your telling. Regards Ming _________________________________________________________________ Ãâ·ÑÏÂÔØ MSN Explorer: http://explorer.msn.com/lccn/