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libpayload/libpci: Introduce device class attribute in pci_dev 

The device class is read at different places and it is read from the
hardware directly. Therefore, and in preparation to CB:46416, introduce
the device class attribute in the pci_dev struct. With this, there is
only one interaction with the hardware and it's also more user friendly.

Change-Id: I5d56be96f3f0da471246f031ea619e3df8e54cfb
Signed-off-by: Felix Singer <felix.singer@secunet.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/46347
Reviewed-by: Nico Huber <nico.h@gmx.de>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
This commit is contained in:
Felix Singer 2020-10-13 18:00:24 +02:00 committed by Nico Huber
parent d2ec82d137
commit 4c9622a7d0
2 changed files with 2 additions and 0 deletions
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1
payloads/libpayload/include/pci/pci.h
View File

@ -74,6 +74,7 @@ struct pci_dev {
u16 domain; u16 domain;
u8 bus, dev, func; u8 bus, dev, func;
u16 vendor_id, device_id; u16 vendor_id, device_id;
u16 device_class;
struct pci_dev *next; struct pci_dev *next;
}; };

1
payloads/libpayload/libpci/libpci.c
View File

@ -178,6 +178,7 @@ static struct pci_dev *pci_scan_single_bus(struct pci_dev *dev, uint8_t bus)
dev->func = func; dev->func = func;
dev->vendor_id = val & 0xffff; dev->vendor_id = val & 0xffff;
dev->device_id = (uint16_t)(val >> 16); dev->device_id = (uint16_t)(val >> 16);
dev->device_class = pci_read_config16(PCI_DEV(bus, slot, func), PCI_CLASS_DEVICE);
dev->next = 0; dev->next = 0;
hdr = pci_read_config8(PCI_DEV(bus, slot, func), hdr = pci_read_config8(PCI_DEV(bus, slot, func),