Hi, On Friday 21 February 2014 07:01 AM, Jingoo Han wrote: > On Thursday, February 20, 2014 10:34 PM, Mohit KUMAR DCG wrote: >> Thursday, February 20, 2014 5:43 PM, Kishon Vijay Abraham I wrote: >>> On Thursday 20 February 2014 05:28 PM, Mohit KUMAR DCG wrote: >>>> On Thursday, February 20, 2014 5:08 PM, Kishon Vijay Abraham I wrote: >>>>> On Thursday 20 February 2014 10:52 AM, Mohit Kumar wrote: >>>>>> This patch correct iATU programming for cfg1, io and mem viewport. >>>>>> Enable ATU only after configuring it. >>>>> >>>>> Does this patch actually fixes device enumeration behind a PCIe-pci >>>>> bridge or this is more of cleaning up the sequence? >>>>> >>>> - This patch corrects ATU programming sequence. I am not aware of any >>>> such issue with current driver. Pls specify which bridge do you use in your >>> setup and what is the problem? >>> >>> I tried with card [1], it had a PLX bridge chip. It couldn't read the configuration >>> space of the device connected to the PCIe-PCI bridge. >>> >> - I don’t have the mentioned card with me, but we are successfully using Lecroy PTC switch >> and SIL3124-2CB364 PCI-X compatible RAID card. >> >> May be Jingoo or others can also comment if they are using PCI bridge card. >> > > Hi Kishon, > Nice to see you again. :-) > > I don't have PCIe-PCI bridge. Currently, I can test Ethernet cards > and SATA cards. The problem seems to be seen only if a device is connected after PCIe-PCI bridge. I've tested USB and Ethernet cards but that works just fine. > > By the way, according to the Datasheet, PCIE_ATU_CR1 setting can be > followed by PCIE_ATU_CR2 setting as below: > > 1. Setup the Index Register. > 2. Setup the Region Base and Limit Address Registers. > 3. Setup the Target Address Registers. > 4. Configure the region through the Region Control 1 Register. > 5. Enable the region. > > Thus, how about testing the following patch? > I also moved PCIE_ATU_CR1 as well as PCIE_ATU_CR2. Thanks for the patch. I have just burnt my PCIE-to-PCI bridge card :-s Will test this once I get a new card. 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
