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HV: extra methods for extracting header fields

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Add some encapsulation of utilities which read PCI header space using
wrapper functions. Also contain verification of PCI vendor to its own
function, rather than having hard-coded integrals exposed among other
code.

v3->v2
        Changed the return type of pci_pdev_read_cfg_secbus
        from 32-bit to 8-bit

v2->v1
	Function names changed to follow Coding guidelines

Tracked-On: #4134
Signed-off-by: Alexander Merritt <alex.merritt@intel.com>
Signed-off-by: Sainath Grandhi <sainath.grandhi@intel.com>
This commit is contained in:
Alexander Merritt 2019-10-31 23:51:38 -07:00 committed by wenlingz
parent f237ca2104
commit b0acad338e
1 changed files with 31 additions and 0 deletions
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31
hypervisor/include/hw/pci.h
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@ -285,5 +285,36 @@ void enable_disable_pci_intx(union pci_bdf bdf, bool enable);
void init_pci_pdev_list(void);
static inline bool is_pci_vendor_valid(uint32_t vendor_id)
{
return !((vendor_id == 0xFFFFFFFFU) || (vendor_id == 0U) ||
(vendor_id == 0xFFFF0000U) || (vendor_id == 0xFFFFU));
}
static inline uint32_t read_pci_pdev_cfg_vendor(union pci_bdf pbdf)
{
return pci_pdev_read_cfg(pbdf, PCIR_VENDOR, 2U);
}
static inline uint8_t read_pci_pdev_cfg_headertype(union pci_bdf pbdf)
{
return (uint8_t)pci_pdev_read_cfg(pbdf, PCIR_HDRTYPE, 1U);
}
static inline uint8_t read_pci_pdev_cfg_secbus(union pci_bdf pbdf)
{
return (uint8_t)pci_pdev_read_cfg(pbdf, PCIR_SECBUS_1, 1U);
}
static inline bool is_pci_cfg_multifunction(uint8_t header_type)
{
return ((header_type & PCIM_MFDEV) == PCIM_MFDEV);
}
static inline bool is_pci_cfg_bridge(uint8_t header_type)
{
return ((header_type & PCIM_HDRTYPE) == PCIM_HDRTYPE_BRIDGE);
}
#endif /* PCI_H_ */