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// Copyright 2021 Canonical Ltd.
// Licensed under the LGPLv3 with static-linking exception.
// See LICENCE file for details.
package linux
import (
"fmt"
"path/filepath"
"regexp"
)
// pcirootRE matches a pcixxxx.xx path component.
var pcirootRE = regexp.MustCompile(`^pci[[:xdigit:]]{4}:[[:xdigit:]]{2}$`)
func handlePCIRootDevicePathNode(state *devicePathBuilderState) error {
component := state.PeekUnhandledSysfsComponents(1)
if !pcirootRE.MatchString(component) {
return errSkipDevicePathNodeHandler
}
state.AdvanceSysfsPath(1)
node, err := newACPIExtendedDevicePathNode(filepath.Join(state.SysfsPath(), "firmware_node"))
if err != nil {
return err
}
if node.HID.Vendor() != "PNP" || (node.HID.Product() != 0x0a03 && node.HID.Product() != 0x0a08) {
return fmt.Errorf("unexpected hid: %v", node.HID)
}
node.HID = 0x0a0341d0
if node.CID != 0 && (node.CID.Vendor() != "PNP" || (node.CID.Product() != 0x0a03 && node.CID.Product() != 0x0a08)) {
return fmt.Errorf("unexpected cid: %v", node.CID)
}
state.Interface = interfaceTypePCI
state.Path = append(state.Path, maybeUseSimpleACPIDevicePathNode(node))
return nil
}
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