Hi Simon, I have not done testing of this driver with checksum offload. I do test the driver in an automated test, but not in checksum offload mode, I need to add that test.
I did receive the following patch and applied it to the Git server so I think Johann did some testing with checksum offload. That may have been with arch/ppc rather than arch/powerpc, not sure. I noticed that you have uboot working with LL TEMAC and it must be using DMA SG as it's running on the same h/w. I just got thru hacking together a rough polled mode LL TEMAC driver to support uboot and it's working, but not cleaned up. Just curious on your experience in that area. Thanks, John Linn Linux Development & Strategy Xilinx is looking for embedded Linux developers.... ******************* the patch text I applied ****************************** From: John Linn [EMAIL PROTECTED] Sent: Friday, April 04, 2008 10:25 AM To: git Cc: John Linn; Johann Baudy Subject: [PATCH] Xilinx: LL TEMAC: Fix checksum offload The LL TEMAC is generating the wrong checksum when TX hardware checksum is enabled. This is mainly due to two issues: - CHECKSUM_COMPLETE can only be used on RX PATH, CHECKSUM_PARTIAL must be used instead. - Checksum index offsets are being calculated wrong. Signed-off-by: Johann Baudy <[EMAIL PROTECTED]> Signed-off-by: John Linn <[EMAIL PROTECTED]> -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Simon Frey Sent: Friday, June 13, 2008 8:46 AM To: linuxppc-dev@ozlabs.org Subject: XLLTemac with SGDMA working on virtex4FX ? Hi all, does anyone have working driver for xps_ll_temac unsing sg dma and checksum offload on rx and tx ?? I use the xlnx kernel with ARCH=powerpc and a device tree generated with the gen_mhs_devtree under EDK 10.1 I don't know what's wrong but i can't get or send anything even the speed is only 10 Mb/s ! that's what i get when the kernel starts... ## Starting application at 0x004007d0 ... Using Xilinx Virtex machine description Linux version 2.6.25-xlnx ([EMAIL PROTECTED]) (gcc version 4.2.2) #11 PREEMPT Fri Jun 13 15:51:29 CEST 2008 Zone PFN ranges: DMA 0 -> 16384 Normal 16384 -> 16384 Movable zone start PFN for each node early_node_map[1] active PFN ranges 0: 0 -> 16384 Built 1 zonelists in Zone order, mobility grouping on. Total pages: 16256 Kernel command line: console=ttyS0,115200 ip=dhcp Xilinx intc at 0x81800000 mapped to 0xfdfff000 PID hash table entries: 256 (order: 8, 1024 bytes) clocksource: timebase mult[1400000] shift[22] registered Console: colour dummy device 80x25 Dentry cache hash table entries: 8192 (order: 3, 32768 bytes) Inode-cache hash table entries: 4096 (order: 2, 16384 bytes) Memory: 61704k/65536k available (2892k kernel code, 3768k reserved, 112k data, 141k bss, 144k init) Mount-cache hash table entries: 512 net_namespace: 536 bytes NET: Registered protocol family 16 NET: Registered protocol family 2 IP route cache hash table entries: 1024 (order: 0, 4096 bytes) TCP established hash table entries: 2048 (order: 2, 16384 bytes) TCP bind hash table entries: 2048 (order: 1, 8192 bytes) TCP: Hash tables configured (established 2048 bind 2048) TCP reno registered Installing knfsd (copyright (C) 1996 [EMAIL PROTECTED]). io scheduler noop registered io scheduler anticipatory registered io scheduler deadline registered io scheduler cfq registered (default) Serial: 8250/16550 driver $Revision: 1.90 $ 4 ports, IRQ sharing disabled 83e00000.serial: ttyS0 at MMIO 0x83e00003 (irq = 16) is a 16550A console [ttyS0] enabled brd: module loaded loop: module loaded Device Tree Probing 'ethernet' xilinx_lltemac 81c00000.ethernet: MAC address is now 0: a:35: 0:22: 1 xilinx_lltemac 81c00000.ethernet: XLlTemac: using DMA mode. XLlTemac: Dma base address: phy: 0x84600100, virt: 0xc5010100 XLlTemac: buffer descriptor size: 32768 (0x8000) XLlTemac: Allocating DMA descriptors with kmalloc<6>XLlTemac: (buffer_descriptor_init) phy: 0x3868000, virt: 0xc3868000, size: 0x8000 XTemac: PHY detected at address 4. xilinx_lltemac 81c00000.ethernet: eth0: Xilinx TEMAC at 0x81C00000 mapped to 0xC500E000, irq=17 mice: PS/2 mouse device common for all mice TCP cubic registered NET: Registered protocol family 1 NET: Registered protocol family 17 RPC: Registered udp transport module. RPC: Registered tcp transport module. eth0: XLlTemac: Options: 0x3fa eth0: XLlTemac: allocating interrupt 19 for dma mode tx. eth0: XLlTemac: allocating interrupt 18 for dma mode rx. eth0: XLlTemac: speed set to 10Mb/s eth0: XLlTemac: Send Threshold = 240, Receive Threshold = 40 eth0: XLlTemac: Send Wait bound = 254, Receive Wait bound = 254 Sending DHCP requests ...... timed out! IP-Config: Reopening network devices... eth0: XLlTemac: Options: 0x3fa I can see the led blinking on my switch but don't see nothing using wireshak !!! Finaly, i know the the temac works because i can use it with uboot !!! even at speed 1000. In: serial Out: serial Err: serial U-Boot relocated to 03fcf000 ### main_loop entered: bootdelay=3 ### main_loop: bootcmd="loooaadd %addr" Press Enter within 3 seconds to stop autoboot Unknown command 'loooaadd' - try 'help' => setenv bootfile zImage.virtex => tftp 40000 eth0: Xilinx XPS LocalLink Tri-Mode Ether MAC #0 at 0x81C00000. 1000BASE-T/FD TFTP from server 192.168.1.100; our IP address is 192.168.1.200 Filename 'zImage.virtex'. Load address: 0x40000 Loading: ################################################################# ######################################################## done Bytes transferred = 1772215 (1b0ab7 hex) => so if someone already had that problem... Thanks in advance Simon ________________________________________________________________________ _____ Envoyez avec Yahoo! Mail. Une boite mail plus intelligente http://mail.yahoo.fr _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-dev This email and any attachments are intended for the sole use of the named recipient(s) and contain(s) confidential information that may be proprietary, privileged or copyrighted under applicable law. If you are not the intended recipient, do not read, copy, or forward this email message or any attachments. Delete this email message and any attachments immediately. _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-dev
