diff options
Diffstat (limited to 'src/include/ipxe/pcimsix.h')
-rw-r--r-- | src/include/ipxe/pcimsix.h | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/src/include/ipxe/pcimsix.h b/src/include/ipxe/pcimsix.h new file mode 100644 index 00000000..aa2aaf01 --- /dev/null +++ b/src/include/ipxe/pcimsix.h @@ -0,0 +1,77 @@ +#ifndef _IPXE_PCIMSIX_H +#define _IPXE_PCIMSIX_H + +/** @file + * + * PCI MSI-X interrupts + * + */ + +FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL ); + +#include <ipxe/pci.h> + +/** MSI-X BAR mapped length */ +#define PCI_MSIX_LEN 0x1000 + +/** MSI-X vector offset */ +#define PCI_MSIX_VECTOR(n) ( (n) * 0x10 ) + +/** MSI-X vector address low 32 bits */ +#define PCI_MSIX_ADDRESS_LO 0x0 + +/** MSI-X vector address high 32 bits */ +#define PCI_MSIX_ADDRESS_HI 0x4 + +/** MSI-X vector data */ +#define PCI_MSIX_DATA 0x8 + +/** MSI-X vector control */ +#define PCI_MSIX_CONTROL 0xc +#define PCI_MSIX_CONTROL_MASK 0x00000001 /**< Vector is masked */ + +/** PCI MSI-X capability */ +struct pci_msix { + /** Capability offset */ + unsigned int cap; + /** Number of vectors */ + unsigned int count; + /** MSI-X table */ + void *table; + /** Pending bit array */ + void *pba; +}; + +extern int pci_msix_enable ( struct pci_device *pci, struct pci_msix *msix ); +extern void pci_msix_disable ( struct pci_device *pci, struct pci_msix *msix ); +extern void pci_msix_map ( struct pci_msix *msix, unsigned int vector, + physaddr_t address, uint32_t data ); +extern void pci_msix_control ( struct pci_msix *msix, unsigned int vector, + uint32_t mask ); +extern void pci_msix_dump ( struct pci_msix *msix, unsigned int vector ); + +/** + * Mask MSI-X interrupt vector + * + * @v msix MSI-X capability + * @v vector MSI-X vector + */ +static inline __attribute__ (( always_inline )) void +pci_msix_mask ( struct pci_msix *msix, unsigned int vector ) { + + pci_msix_control ( msix, vector, PCI_MSIX_CONTROL_MASK ); +} + +/** + * Unmask MSI-X interrupt vector + * + * @v msix MSI-X capability + * @v vector MSI-X vector + */ +static inline __attribute__ (( always_inline )) void +pci_msix_unmask ( struct pci_msix *msix, unsigned int vector ) { + + pci_msix_control ( msix, vector, 0 ); +} + +#endif /* _IPXE_PCIMSIX_H */ |