diff options
Diffstat (limited to 'src/sys/include/io/pci')
| -rw-r--r-- | src/sys/include/io/pci/pci.h | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/src/sys/include/io/pci/pci.h b/src/sys/include/io/pci/pci.h index cff5f0a..9184c00 100644 --- a/src/sys/include/io/pci/pci.h +++ b/src/sys/include/io/pci/pci.h @@ -32,6 +32,22 @@ #include <sys/types.h> #include <sys/queue.h> +#include <sys/cdefs.h> + +/* + * Use for making instances of the pci_adv + * structure. + */ +#define PCI_CS_ID(CLASS, SUBCLASS) \ + { \ + .class = (CLASS), \ + .subclass = (SUBCLASS) \ + } +#define PCI_DV_ID(DEVICE, VENDOR) \ + { \ + .device = (DEVICE), \ + .vendor = (VENDOR) \ + } /* PCI specific types */ typedef uint32_t pcireg_t; @@ -58,6 +74,25 @@ struct pci_device { TAILQ_ENTRY(pci_device) link; }; +/* + * Structure that allows a device driver of a PCI + * bus node to advocate for its workings. In other words, + * it registers itself to be the driver of the device. + * + * @lookup: Lookup arguments + * @attach: Attach the driver + * @classrev: IF 1, identified by class/subclass + * + * XXX: The `lookup` field is used for both input arguments + * as well as output results + */ +struct pci_adv { + struct pci_device lookup; + int(*attach)(struct pci_adv *ap); + uint8_t classrev : 1; + TAILQ_ENTRY(pci_adv) link; +}; + typedef enum { PCI_LU_VENDEV, /* Vendor / device */ PCI_LU_CLASSREV, /* Class / subclass */ @@ -73,6 +108,16 @@ typedef enum { int pci_bus_lookup(struct pci_device *lookup, lookup_type_t type); /* + * Advocate for a specific device as its driver. + * + * @advp: Advocation descriptor + * + * Returns zero on success, otherwise a less than + * zero value on failure. + */ +int pci_advoc(struct pci_adv *advp); + +/* * Read from a specific register on a specific PCI * enabled device. * |