We've found a way to get ping to fail all of the time by increasing the size of the ping messages. When we use the max in Windows of 65500, every ping to the first FCC1 Ethernet is dropped. However, when we ping with a size of 65500 to the second FCC2 Ethernet everything is fine and all echos are successful.
In windows: ping -l 64000 172.24.100.11 -t It definitely seems to be a problem with the mpc, but I'm not sure where to look. Board? KErnel? boot loader? The two Ethernet devices should be configured identically, and looking through the kernel code, it seems that there aren't any preferred treatment differences. Could the problem be in the bit-banging mdio control, or should I look within fs_enet? We've got this reproducing on all of our boards and it could also reside in the board setup... Does anyone with experience on the ep8248 and/or mpc8272 family, fs_enet-* code have any ideas where I should look next? -Alan FCC1/2 registers ============= gfmr1: 0x2000003c fpsmr1: 0x14000080 ftodr1: 0x1400 fdsr1: 0xd555 fcce1: 0x00080100 fccm1: 0x001b0000 fccs1: 0x00 ftirr1_phy0: 0x00 ftirr1_phy1: 0x00 ftirr1_phy2: 0x00 ftirr1_phy3: 0x00 gfmr2: 0x2000003c fpsmr2: 0x14000080 ftodr2: 0x1400 fdsr2: 0xd555 fcce2: 0x00080100 fccm2: 0x001b0000 fccs2: 0x00 ftirr2_phy0: 0x00 ftirr2_phy1: 0x00 ftirr2_phy2: 0x00 ftirr2_phy3: 0x00 FCC1/2 PRAM ================= e0008400 : 0x0180 RIPTR e0008402 : 0x01a0 TIPTR e0008404 : 0x0000 ---- e0008406 : 0x0600 MRBLR (maximum receive buffer length e0008408 : 0x30a0 RSTATE(receive internal state e000840a : 0x0000 e000840c : 0x0795 RBASE e000840e : 0xe000 e0008410 : 0x2c80 RBDSTAT ---------now 8400 went to 8c00 e0008412 : 0x0040 RBDLEN e0008414 : 0x0796 RBDPTR e0008416 : 0x1010 e0008418 : 0x3004 TSTATE e000841a : 0x0000 e000841c : 0x0795 TBASE e000841e : 0xe100 e0008420 : 0x0000 TBDSTAT e0008422 : 0x0000 TBDLEN e0008424 : 0x0000 TDPTR e0008426 : 0x0000 e0008428 : 0x0795 RBPTR e000842a : 0xe0f8 e000842c : 0x0795 TBPTR e000842e : 0xe100 e0008430 : 0xdebb RCRC e0008432 : 0x20e3 e0008434 : 0xffff ---- e0008436 : 0xffff ---- e0008438 : 0x0000 TCRC e000843a : 0x0000 e000843c : 0x0000 ---- e000843e : 0x0000 ---- e0008500 : 0x0200 RIPTR e0008502 : 0x0220 TIPTR e0008504 : 0x0000 ---- e0008506 : 0x0600 MRBLR (maximum receive buffer length e0008508 : 0x30a0 RSTATE(receive internal state e000850a : 0x0000 e000850c : 0x0796 RBASE e000850e : 0x2000 e0008510 : 0x0c80 RBDSTAT now 8400 now 8c00 e0008512 : 0x0040 RBDLEN e0008514 : 0x07b1 RBDPTR e0008516 : 0xc010 e0008518 : 0x3004 TSTATE e000851a : 0x0000 e000851c : 0x0796 TBASE e000851e : 0x2100 e0008520 : 0x0000 TBDSTAT e0008522 : 0x0000 TBDLEN e0008524 : 0x0000 TDPTR e0008526 : 0x0000 e0008528 : 0x0796 RBPTR e000852a : 0x2018 e000852c : 0x0796 TBPTR e000852e : 0x2100 e0008530 : 0xdebb RCRC e0008532 : 0x20e3 e0008534 : 0xffff ---- e0008536 : 0xffff ---- e0008538 : 0x0000 TCRC e000853a : 0x0000 e000853c : 0x0000 ---- e000853e : 0x0000 ---- _______________________________________________ Linuxppc-embedded mailing list Linuxppc-embedded@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-embedded
