On 24/11/2015 17:57, Gabriele Paoloni wrote: >> -----Original Message----- >> From: Ramon Fried [mailto:ramon.fried@xxxxxxxxxxx] >> Sent: Tuesday, November 24, 2015 3:33 PM >> To: Gabriele Paoloni >> Cc: linux-pci@xxxxxxxxxxxxxxx >> Subject: RE: PCIe endpoint generic driver >> >> >>>> -----Original Message----- >>>> From: linux-pci-owner@xxxxxxxxxxxxxxx >>>> [mailto:linux-pci-owner@xxxxxxxxxxxxxxx] >>>> On Behalf Of Ramon Fried >>>> Sent: 24 November 2015 15:02 >>>> To: linux-pci@xxxxxxxxxxxxxxx >>>> Subject: RE: PCIe endpoint generic driver >>>> >>>>>> Hi. >>>>>> Sorry for the noob question :) >>>>>> I'm currently developing a PCIe endpoint driver for a board that >>>>>> runs Linux. >>>>>> The board will be used as an expansion PCIe card for x86 PC's. >>>>>> Is there any guidelines, documentation related to PCI endpoint >>>>>> drivers for Linux kernel ? >>>>> Hi Ramon >>>>> >>>>> Have you looked at >>>>> http://lxr.free-electrons.com/source/Documentation/PCI/pci.txt >>>>> ? >>>>> >>>>> Regards >>>>> >>>>> Gab >>>> Hi Gab, you misunderstood my driver type. >>>> This is not a host driver, that I'm writing, but the actual >>>> endpoint >> driver. >>>> Then Linux is on the PCIe board. >>> Hi Ramon, I understood your driver type. >>> I think you misunderstood the Documentation. >>> Host Bridges are under drivers/pci/host and none of them use >> pci_register_driver() API. >>> pci_register_driver() is actually for endpoints. Please read the >>> link >> above again. >> >> Hi Gab. >> Host bridges AFAIK are supposed to connect between the host CPU, main >> memory and the PCI itself. >> This is not what I need as I'm not at the host side. >> pci_register_driver() is a host driver for pci endpoints. > pci_register_driver() is an API to register an endpoint PCI driver > (try to grep for it in the linux source tree). > >> On the device side, pci_register_driver() doesn't make any sense. >> There's no root complex, no enumeration, etc. > Ah, so how comes that all EP drivers at the end call it? It's not the device side. it's the host side. > >> I need for instance a method to send a MSI/MSIx interrupt to the host. > That depends on your HW and on your driver type AFAIK I'm writing the HW software, that's the driver I'm writing. > > One of many examples you can find in the Kernel source tree can be > http://lxr.free-electrons.com/source/drivers/net/ethernet/intel/ixgbe/ > ixgbe_main.c#L9284 > > You can see how the driver is structured... This is on the host side. I can assure you there's a FPGA / ROM code on the device(Intel 10Gb) that configures that PCI end point. > >> I need to develop a function that does it. >> >> My original question was if there's a framework/guidelines for >> achieving that. >> >> Thanks. >> Ramon -- 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
