diff options
| -rw-r--r-- | src/soc/intel/xeon_sp/chip_common.c | 80 | ||||
| -rw-r--r-- | src/soc/intel/xeon_sp/include/soc/chip_common.h | 3 |
2 files changed, 83 insertions, 0 deletions
diff --git a/src/soc/intel/xeon_sp/chip_common.c b/src/soc/intel/xeon_sp/chip_common.c index 08d723bffd5f..0c1d52bc86f3 100644 --- a/src/soc/intel/xeon_sp/chip_common.c +++ b/src/soc/intel/xeon_sp/chip_common.c @@ -22,6 +22,86 @@ static const STACK_RES *domain_to_stack_res(const struct device *dev) return &hob->PlatformData.IIO_resource[dn.socket].StackRes[dn.stack]; } +/** + * Find a device of a given vendor and type for the specified socket. + * The function iterates over all PCI domains of the specified socket + * and matches the PCI vendor and device ID. + * + * @param socket The socket where to search for the device. + * @param vendor A PCI vendor ID (e.g. 0x8086 for Intel). + * @param device A PCI device ID. + * @return Pointer to the device struct. + */ +struct device *dev_find_device_on_socket(uint8_t socket, u16 vendor, u16 device) +{ + struct device *domain, *dev = NULL; + union xeon_domain_path dn; + + while ((dev = dev_find_device(vendor, device, dev))) { + domain = dev_get_pci_domain(dev); + if (!domain) + continue; + dn.domain_path = domain->path.domain.domain; + if (dn.socket != socket) + continue; + return dev; + } + + return NULL; +} + +/** + * Returns the socket ID where the specified device is connected to. + * This is an integer in the range [0, CONFIG_MAX_SOCKET). + * + * @param dev The device to look up + * + * @return Socket ID the device is attached to, negative number on error. + */ +int iio_pci_domain_socket_from_dev(struct device *dev) +{ + struct device *domain; + union xeon_domain_path dn; + + if (dev->path.type == DEVICE_PATH_DOMAIN) + domain = dev; + else + domain = dev_get_pci_domain(dev); + + if (!domain) + return -1; + + dn.domain_path = domain->path.domain.domain; + + return dn.socket; +} + +/** + * Returns the stack ID where the specified device is connected to. + * This is an integer in the range [0, MAX_IIO_STACK). + * + * @param dev The device to look up + * + * @return Stack ID the device is attached to, negative number on error. + */ +int iio_pci_domain_stack_from_dev(struct device *dev) +{ + struct device *domain; + union xeon_domain_path dn; + + if (dev->path.type == DEVICE_PATH_DOMAIN) + domain = dev; + else + domain = dev_get_pci_domain(dev); + + if (!domain) + return -1; + + dn.domain_path = domain->path.domain.domain; + + return dn.stack; +} + void iio_pci_domain_read_resources(struct device *dev) { struct resource *res; diff --git a/src/soc/intel/xeon_sp/include/soc/chip_common.h b/src/soc/intel/xeon_sp/include/soc/chip_common.h index f3cb950d296b..37277775ca36 100644 --- a/src/soc/intel/xeon_sp/include/soc/chip_common.h +++ b/src/soc/intel/xeon_sp/include/soc/chip_common.h @@ -20,5 +20,8 @@ void iio_pci_domain_scan_bus(struct device *dev); void attach_iio_stacks(struct device *dev); void soc_create_ioat_domains(union xeon_domain_path path, struct bus *bus, const STACK_RES *sr); +struct device *dev_find_device_on_socket(uint8_t socket, u16 vendor, u16 device); +int iio_pci_domain_socket_from_dev(struct device *dev); +int iio_pci_domain_stack_from_dev(struct device *dev); #endif /* _CHIP_COMMON_H_ */ |