diff options
Diffstat (limited to 'include/hw/pci/pci.h')
| -rw-r--r-- | include/hw/pci/pci.h | 26 |
1 files changed, 24 insertions, 2 deletions
diff --git a/include/hw/pci/pci.h b/include/hw/pci/pci.h index 4420f47..9ed1624 100644 --- a/include/hw/pci/pci.h +++ b/include/hw/pci/pci.h @@ -15,6 +15,7 @@ #define PCI_DEVFN(slot, func) ((((slot) & 0x1f) << 3) | ((func) & 0x07)) #define PCI_SLOT(devfn) (((devfn) >> 3) & 0x1f) #define PCI_FUNC(devfn) ((devfn) & 0x07) +#define PCI_BUILD_BDF(bus, devfn) ((bus << 8) | (devfn)) #define PCI_SLOT_MAX 32 #define PCI_FUNC_MAX 8 @@ -230,6 +231,20 @@ typedef void (*MSIVectorPollNotifier)(PCIDevice *dev, unsigned int vector_start, unsigned int vector_end); +enum PCIReqIDType { + PCI_REQ_ID_INVALID = 0, + PCI_REQ_ID_BDF, + PCI_REQ_ID_SECONDARY_BUS, + PCI_REQ_ID_MAX, +}; +typedef enum PCIReqIDType PCIReqIDType; + +struct PCIReqIDCache { + PCIDevice *dev; + PCIReqIDType type; +}; +typedef struct PCIReqIDCache PCIReqIDCache; + struct PCIDevice { DeviceState qdev; @@ -252,6 +267,11 @@ struct PCIDevice { /* the following fields are read only */ PCIBus *bus; int32_t devfn; + /* Cached device to fetch requester ID from, to avoid the PCI + * tree walking every time we invoke PCI request (e.g., + * MSI). For conventional PCI root complex, this field is + * meaningless. */ + PCIReqIDCache requester_id_cache; char name[64]; PCIIORegion io_regions[PCI_NUM_REGIONS]; AddressSpace bus_master_as; @@ -692,11 +712,13 @@ static inline uint32_t pci_config_size(const PCIDevice *d) return pci_is_express(d) ? PCIE_CONFIG_SPACE_SIZE : PCI_CONFIG_SPACE_SIZE; } -static inline uint16_t pci_requester_id(PCIDevice *dev) +static inline uint16_t pci_get_bdf(PCIDevice *dev) { - return (pci_bus_num(dev->bus) << 8) | dev->devfn; + return PCI_BUILD_BDF(pci_bus_num(dev->bus), dev->devfn); } +uint16_t pci_requester_id(PCIDevice *dev); + /* DMA access functions */ static inline AddressSpace *pci_get_address_space(PCIDevice *dev) { |