Do not use private mail for such topics. Next time I will just remove your mail without reading. On Thu, 2014-12-18 at 23:58 -0800, GIRISH HALADY wrote: > Hi Andy, > Hope you are doing good. Apologize, I haven't had a chance to > work on the DMA thing that I was experimenting before. I could get > the Xilinx's Petalinux to build with the DMATest as a kernel module > and have the test run on ZYNQ's Petalinux prompt. Please find the > screenshots attached > > However, the challenge that I have now is that I have a 8K > memory(RAM) extended at physical location 0x4000_0000 as follows in > the Device tree information passed to kernel config: It seems we already discussed this. [1] [1] http://www.spinics.net/lists/dmaengine/msg02574.html > > /* > * CAUTION: This file is automatically generated by Xilinx. > * Version: HSM 2014.2 > * Today is: Thu Dec 18 11:16:54 2014 > */ > > &ps7_axi_interconnect_0 { > ranges; > axi_bram_ctrl_0: axi-bram-ctrl@40000000 { > compatible = "xlnx,axi-bram-ctrl-4.0"; > reg = <0x40000000 0x2000>; > xlnx,bram-addr-width = <0xb>; > xlnx,bram-inst-mode = "EXTERNAL"; > xlnx,ecc = <0x0>; > xlnx,ecc-onoff-reset-value = <0x0>; > xlnx,ecc-type = <0x0>; > xlnx,fault-inject = <0x0>; > xlnx,memory-depth = <0x800>; > xlnx,s-axi-ctrl-addr-width = <0x20>; > xlnx,s-axi-ctrl-data-width = <0x20>; > xlnx,s-axi-id-width = <0xc>; > xlnx,s-axi-supports-narrow-burst = <0x1>; > xlnx,single-port-bram = <0x1>; > } ; > } ; > > Now I would want to be able to use the dmatest to perform DMA from DDR > to this memory and viceversa. Would there be a way of specifying this > memory as either the source or the destination using dmatest module, > as Petalinux works on Virtual memory, I'm trying to figure out how to > specify the physical address of this memory to the kernel. > > Would greatly appreciate your help on this. > > Looking forward to hearing back from you soon. > > THanks and Best Regards > > Girish Halady -- Andy Shevchenko <andriy.shevchenko@xxxxxxxxx> Intel Finland Oy -- To unsubscribe from this list: send the line "unsubscribe dmaengine" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
