Hi, On Thursday 12 September 2013 03:22 PM, Pratyush Anand wrote: > Hi Kishon, > > On Thu, Sep 12, 2013 at 05:43:40PM +0800, Kishon Vijay Abraham I wrote: >> Hi, >> >> On Thursday 12 September 2013 03:00 PM, Pratyush Anand wrote: >>> Hi Jingoo, >>> >>> >>> On Thu, Sep 12, 2013 at 03:15:04PM +0800, Jingoo Han wrote: >>>> On Tuesday 23 July 2013 12:30 PM, Kishon Vijay Abraham I wrote: >>>>>>> . >>>>>>> . >>>>>>>>>> + of_pci_range_to_resource(&range, np, &pp->cfg); >>>>>>>>>> + pp->config.cfg0_size = resource_size(&pp->cfg)/2; >>>>>>>>>> + pp->config.cfg1_size = resource_size(&pp->cfg)/2; >>>>>>>>>> + } >>>>>>>>>> + } >>>>>>>>>> + >>>>>>>>>> + pp->dbi_base = devm_ioremap(pp->dev, pp->cfg.start, >>>>>>>>>> + resource_size(&pp->cfg)); >>>>>>>>> >>>>>>>>> Why is configuraion space divided into two? >>>>>>>> >>>>>>>> Sorry, I don't know the exact reason. :( >>>>>>>> Pratyush Anand may know about this. >>>>>>>> Pratyush Anand, could you answer the question? >>>>>>>> >>>>>>>> Also, if you find some problems, please let me know. >>>>> >>>>> One more query.. >>>>> >>>>> Where is inbound translation configuration done in your driver? how should it >>>>> be done? >>>> >>> >>> Yes, Kishon is right. Inbound translation configuration is missing in >>> your code and I think it should be implemented. >>> >>>> Hi Kishon, >>>> >>>> Sorry, I cannot understand your question exactly. >>>> However, the following thread would be helpful. >>>> >>>> http://www.spinics.net/lists/arm-kernel/msg252078.html >>>> https://lkml.org/lkml/2013/6/17/890 >>> >>> From this conversation, It seems that you >>> have tested this driver and it works fine without inbound translation >>> function. I am sure that you would have tested a PCIe card with DMA >>> capability such as PCIe2USB or PCIe2Ethernet. Since it worked, it >>> means that by default your controller is supporting one to one mapping >>> in case of inbound transaction even when address translation is enabled. >> >> btw, I'm testing Ethernet controller: Realtek Semiconductor Co., Ltd. >> RTL8111/8168B PCI Express Gigabit Ethernet controller. >> >> when I do ifconfig eth0 up, I get *r8169 0000:01:00.0 eth0: link up.* >> But I dont receive any packets and ping also fails and the tx and rx packet >> count is also 0. Could it be related to inbound translation? > > A PCIe analyser log would tell a definite cause. Most likely either > inbound translation is not working or INTx/MSI is not working. I have enabled only legacy interrupts. Whenever I connect or disconnect ethernet cable I get link up/link down message and also the interrupt count for eth0 increases. So I'm not doubting INTx interrupts as such. btw configuring inbound translation once in dw_pcie_host_init enough is it? I mean we use the same registers for configuring outbound translation also no? So doesn't the inbound configuration gets lost? Thanks Kishon -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
