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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,106 @@ | ||
| package yusur | ||
|
|
||
| import ( | ||
| "errors" | ||
| "fmt" | ||
| "os" | ||
| "path" | ||
| "path/filepath" | ||
| "regexp" | ||
| "strconv" | ||
| "strings" | ||
| ) | ||
|
|
||
| const ( | ||
| HwAddr = "hw" | ||
| YusurSmartNic = "smart-nic" | ||
| PlatName = "plat_name" | ||
| PciSysDir = "/sys/bus/pci/devices" | ||
| ) | ||
|
|
||
| var virtFnRe = regexp.MustCompile(`virtfn(\d+)`) | ||
|
|
||
| // IsYusurSmartNic check is Yusur smart Nic | ||
| func IsYusurSmartNic(pciAddress string) bool { | ||
| platFile := filepath.Join(PciSysDir, pciAddress, HwAddr, PlatName) | ||
|
|
||
| absPath, err := filepath.Abs(platFile) | ||
| if err != nil || !strings.HasPrefix(absPath, PciSysDir) { | ||
| return false | ||
| } | ||
|
|
||
| platName, err := os.ReadFile(absPath) | ||
| if err != nil { | ||
| return false | ||
| } | ||
|
|
||
| yusurSmartNic := strings.TrimSpace(string(platName)) | ||
| return strings.HasSuffix(yusurSmartNic, YusurSmartNic) | ||
| } | ||
|
|
||
| // GetYusurNicPfPciFromVfPci retrieves the PF PCI address | ||
| func GetYusurNicPfPciFromVfPci(vfPciAddress string) (string, error) { | ||
| pfPath := filepath.Join(PciSysDir, vfPciAddress, "physfn") | ||
| absPath, err := filepath.Abs(pfPath) | ||
| if err != nil || !strings.HasPrefix(absPath, PciSysDir) { | ||
| return "", errors.New("pfPath is not ") | ||
| } | ||
|
|
||
| pciDevDir, err := os.Readlink(absPath) | ||
| if err != nil { | ||
| return "", fmt.Errorf("failed to read physfn link, provided address may not be a VF. %w", err) | ||
| } | ||
|
|
||
| pf := path.Base(pciDevDir) | ||
| if pf == "" { | ||
| return pf, errors.New("could not find PF PCI Address") | ||
| } | ||
| return pf, err | ||
| } | ||
|
|
||
| // GetYusurNicPfIndexByPciAddress gets a VF PCI address and | ||
| // returns the correlate PF index. | ||
| func GetYusurNicPfIndexByPciAddress(pfPci string) (int, error) { | ||
| pfIndex, err := strconv.Atoi(string(pfPci[len(pfPci)-1])) | ||
| if err != nil { | ||
| return -1, fmt.Errorf("failed to get pfPci of device %s %w", pfPci, err) | ||
| } | ||
|
|
||
| return pfIndex, nil | ||
| } | ||
|
|
||
| // GetYusurNicVfIndexByPciAddress gets a VF PCI address and | ||
| // returns the correlate VF index. | ||
| func GetYusurNicVfIndexByPciAddress(vfPciAddress string) (int, error) { | ||
| vfPath := filepath.Join(PciSysDir, vfPciAddress, "physfn", "virtfn*") | ||
| absPath, err := filepath.Abs(vfPath) | ||
| if err != nil || !strings.HasPrefix(absPath, PciSysDir) { | ||
| return -1, errors.New("pfPath is not ") | ||
| } | ||
|
|
||
| matches, err := filepath.Glob(absPath) | ||
| if err != nil { | ||
| return -1, err | ||
| } | ||
| for _, match := range matches { | ||
| tmp, err := os.Readlink(match) | ||
| if err != nil { | ||
| continue | ||
| } | ||
| if strings.Contains(tmp, vfPciAddress) { | ||
| result := virtFnRe.FindStringSubmatch(match) | ||
| vfIndex, err := strconv.Atoi(result[1]) | ||
| if err != nil { | ||
| continue | ||
| } | ||
| return vfIndex, nil | ||
| } | ||
| } | ||
| return -1, fmt.Errorf("vf index for %s not found", vfPciAddress) | ||
| } | ||
|
|
||
| // GetYusurNicVfRepresentor return representor name | ||
| func GetYusurNicVfRepresentor(pfIndex, vfIndex int) string { | ||
| vfr := fmt.Sprintf("pf%dvf%drep", pfIndex, vfIndex) | ||
| return vfr | ||
| } |