On Fri, Jul 4, 2014 at 5:35 PM, Rafał Miłecki <zajec5@xxxxxxxxx> wrote: > On 3 July 2014 22:06, Rafał Miłecki <zajec5@xxxxxxxxx> wrote: >> I'm dealing with Broadcom devices and it appears I need to know if the >> current PCIe device is Gen 1 or Gen 2. This is because they have >> slightly different registers: >> #define PCI_BAR0_WIN2 0xac >> #define PCIE2_BAR0_WIN2 0x70 >> >> Is there a way to know that? I keep starring at struct pci_dev, but >> can't see "generation" field. Tried Googling, but couldn't find >> anything. > > I've noticed that my 14e4:4360 card (PCIe Gen2) has: > LNKCAP: 0x0046DC12 (hint: PCI_EXP_LNKCAP_SLS_5_0GB) > > Some older card 14e4:4359 (PCIe 1) has: > LNKCAP: 0x00176811 (hint: PCI_EXP_LNKCAP_SLS_2_5GB) > > Wikipedia says 500 MB/s was added in PCIe 2.0. > > Could I check for this bit to determine if I'm dealing PCIe 2.0 card? No, I think you should use the device ID to differentiate between the register layouts. Bjorn -- 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
