Could you please send the output of 'ethtool -i' for each of the interfaces? Also the output of 'dmesg | grep -i i40e' would help.
Thanks, - Greg > -----Original Message----- > From: Rose, Gregory V [mailto:gregory.v.r...@intel.com] > Sent: Wednesday, May 20, 2015 1:37 PM > To: Vladimir Levintovich; e1000-devel@lists.sourceforge.net > Subject: Re: [E1000-devel] Programming i2c interface on XL710 > > > -----Original Message----- > > From: Vladimir Levintovich [mailto:vladim...@silicom.co.il] > > Sent: Wednesday, May 20, 2015 7:25 AM > > To: Rose, Gregory V; e1000-devel@lists.sourceforge.net > > Subject: RE: Programming i2c interface on XL710 > > > > Thanks. > > I tryed. > > Here are 2 commands for example: > > find /sys/kernel/debug/i40e/ -name command -exec sh -c 'echo "write > > 0x000881e0 0x05a01234" > {}' {} ';' > > find /sys/kernel/debug/i40e/ -name command -exec sh -c 'echo "read > > 0x000881e0 " > {}' {} ';' > > Below is the result from the dmesg buffer: > > [89780.472266] i40e 0000:02:00.1: write: 0x000881e0 = 0x05a00d00 > > [89780.474727] i40e 0000:02:00.0: write: 0x000881e0 = 0x05a01234 > > [89780.479131] i40e 0000:02:00.1: read: 0x000881e0 = 0xa5a01234 > > [89780.481625] i40e 0000:02:00.0: read: 0x000881e0 = 0xa5a01234 > > It appears to me that you were able to successfully write 01234h to the > device at bus address 02:00.0 - I rearranged the above to help show it. > > > [89780.474727] i40e 0000:02:00.0: write: 0x000881e0 = 0x05a01234 > > [89780.481625] i40e 0000:02:00.0: read: 0x000881e0 = 0xa5a01234 > > But the write to the device at bus address 02:00.1 did not succeed - you > wrote 0D00h but read back 01234h. > > > [89780.472266] i40e 0000:02:00.1: write: 0x000881e0 = 0x05a00d00 > > [89780.479131] i40e 0000:02:00.1: read: 0x000881e0 = 0xa5a01234 > > I think the i2c interface is writeable only through the first function of > the device. I will check and get back to you with an answer. But for now > it appears that you are able to write to the register on the device at bus > address 02:00.0. > > - Greg > > > > > I have disconnected qsfp Trancievers and I saw at the same result. It > > means I wrote nothing to the QSFP Tranciever. > > Please advise how can I advance? > > Thank you > > > > -----Original Message----- > > From: Rose, Gregory V [mailto:gregory.v.r...@intel.com] > > Sent: Monday, May 18, 2015 8:30 PM > > To: Vladimir Levintovich; e1000-devel@lists.sourceforge.net > > Subject: RE: Programming i2c interface on XL710 > > > > > > > -----Original Message----- > > > From: Vladimir Levintovich [mailto:vladim...@silicom.co.il] > > > Sent: Monday, May 18, 2015 9:07 AM > > > To: e1000-devel@lists.sourceforge.net > > > Subject: [E1000-devel] Programming i2c interface on XL710 > > > > > > Hi guys, > > > > > > Is someone have an experience with programming i2c interface on XL710? > > > > > > I need to test QSFP+ 10 Gbs 4X Pluggable Transceiver (FTL410QD2C) , > i.e. > > > to write something data, read that and also to test Acknowledge. > > > Device code of this transceiver is 1010000 R/W. > > > > > > According to XL710 data sheet, I need to write/read to/from register > > > GLGEN_I2CCMD0 (offset 0x000881E0). > > > I perform it using some utility. Here are 2 commands for example: > > > find /sys/kernel/debug/i40e/ -name command -exec sh -c 'echo "write > > > 0x000881e0 0x20a05a5a" > {}' {} ';' > > > find /sys/kernel/debug/i40e/ -name command -exec sh -c 'echo "write > > > 0x000881e0 0x28a00000" > {}' {} ';' > > > find /sys/kernel/debug/i40e/ -name command -exec sh -c 'echo "read > > > 0x000881e0 " > {}' {} ';' > > > > > > How do I need to write/read to/from this register properly? > > > > It appears that you've written 0x5a5a to register 0xA0 and then are > > reading the value back. What makes you think you haven't done it > > correctly? > > > > > I don't understand what is filed REGADD and PHYADD (chapter > > 11.2..2.1.14)? > > > > I'm no expert on I2C programming but it appears the REGADD field is > > the offset of one of the registers - in your example above it is 0xA0. > > The PHYADD bits are refer to the device address - it says it should be > 1010b. > > It is a bit confusing because the field is 3 bits but the default > > value they mention is 4 bits. From your example above it appears > > you're using the value 000b. Perhaps changing it 101b might help? > > > > Thanks, > > > > - Greg > > > -------------------------------------------------------------------------- > ---- > One dashboard for servers and applications across Physical-Virtual-Cloud > Widest out-of-the-box monitoring support with 50+ applications Performance > metrics, stats and reports that give you Actionable Insights Deep dive > visibility with transaction tracing using APM Insight. > http://ad.doubleclick.net/ddm/clk/290420510;117567292;y > _______________________________________________ > E1000-devel mailing list > E1000-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/e1000-devel > To learn more about Intel® Ethernet, visit > http://communities.intel.com/community/wired ------------------------------------------------------------------------------ One dashboard for servers and applications across Physical-Virtual-Cloud Widest out-of-the-box monitoring support with 50+ applications Performance metrics, stats and reports that give you Actionable Insights Deep dive visibility with transaction tracing using APM Insight. http://ad.doubleclick.net/ddm/clk/290420510;117567292;y _______________________________________________ E1000-devel mailing list E1000-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/e1000-devel To learn more about Intel® Ethernet, visit http://communities.intel.com/community/wired
