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pci_device: Add a function to find PCI capability ID recursively

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Some PCI capabilities should only be enabled if it is available not
only on a device, but also all bridge upstream of it. Checking only
the device and the bridge just above it may not be enough.

Signed-off-by: Bill XIE <persmule@hardenedlinux.org>
Change-Id: I1237d3b4b86dd0ae5eb586e3c3c407362e6ca291
Reviewed-on: https://review.coreboot.org/c/coreboot/+/66383
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-by: Lean Sheng Tan <sheng.tan@9elements.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
This commit is contained in:
Bill XIE
2022-08-02 22:55:51 +08:00
committed by Martin L Roth
parent a43380e3d5
commit 513d359dad
2 changed files with 25 additions and 0 deletions
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src/include/device/pci.h
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@@ -97,6 +97,7 @@ void pci_dev_set_subsystem(struct device *dev, unsigned int vendor,
unsigned int device);
void pci_dev_init(struct device *dev);
unsigned int pci_match_simple_dev(struct device *dev, pci_devfn_t sdev);
uint16_t pci_find_cap_recursive(const struct device *dev, uint16_t cap);
const char *pin_to_str(int pin);
int get_pci_irq_pins(struct device *dev, struct device **parent_bdg);