Re: [libvirt] [PATCH v2 1/2] virpci: Introduce virPCIDeviceIsPCIExpress and friends

These functions will handle PCIe devices and their link capabilities to query some info about it. Signed-off-by: Michal Privoznik <mprivozn(a)redhat.com&gt; --- src/libvirt_private.syms | 3 ++ src/util/virpci.c | 96 +++++++++++++++++++++++++++++++++++++++++++++++- src/util/virpci.h | 8 ++++ 3 files changed, 106 insertions(+), 1 deletion(-)

diff --git a/src/util/virpci.c b/src/util/virpci.c index e0f2344..6f4f6af 100644 --- a/src/util/virpci.c +++ b/src/util/virpci.c @@ -120,6 +120,7 @@ struct _virPCIDeviceList { /* PCI30 6.7 Capabilities List */ #define PCI_CAPABILITY_LIST 0x34 /* Offset of first capability list entry */ +#define PCI_CAP_FLAGS 2 /* Capability defined flags (16 bits) */ /* PM12 3.2.1 Capability Identifier */ #define PCI_CAP_ID_PM 0x01 /* Power Management */ @@ -130,7 +131,13 @@ struct _virPCIDeviceList { /* PCIe20 7.8.3 Device Capabilities Register (Offset 04h) */ #define PCI_EXP_DEVCAP 0x4 /* Device capabilities */ -#define PCI_EXP_DEVCAP_FLR (1<<28) /* Function Level Reset */ +#define PCI_EXP_DEVCAP_FLR (1<<28) /* Function Level Reset */ +#define PCI_EXP_LNKCAP 0xc /* Link Capabilities */ +#define PCI_EXP_LNKCAP_SPEED 0x0000f /* Maximum Link Speed */ +#define PCI_EXP_LNKCAP_WIDTH 0x003f0 /* Maximum Link Width */ +#define PCI_EXP_LNKSTA 0x12 /* Link Status */ +#define PCI_EXP_LNKSTA_SPEED 0x000f /* Negotiated Link Speed */ +#define PCI_EXP_LNKSTA_WIDTH 0x03f0 /* Negotiated Link Width */