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| author |   Tal Gilboa <talgi@mellanox.com> | 2018-03-30 07:44:05 -0500 |
|---|---|---|
| committer |   Bjorn Helgaas <bhelgaas@google.com> | 2018-03-30 15:33:38 -0500 |
| commit | 6cf57be0f78e289aaf236f8bc55c40ea6c422c75 (patch) | |
| tree | 6a139948424dfd0d349b2baf06bdcd4370285427 /drivers/pci/pci.h | |
| parent | PCI: Add decoding for 16 GT/s link speed (diff) | |
| download | linux-dev-6cf57be0f78e289aaf236f8bc55c40ea6c422c75.tar.xz linux-dev-6cf57be0f78e289aaf236f8bc55c40ea6c422c75.zip | |
PCI: Add pcie_get_speed_cap() to find max supported link speed
Add pcie_get_speed_cap() to find the max link speed supported by a device.
Change max_link_speed_show() to use pcie_get_speed_cap().
Signed-off-by: Tal Gilboa <talgi@mellanox.com>
[bhelgaas: return speed directly instead of error and *speed, don't export
outside drivers/pci]
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Tariq Toukan <tariqt@mellanox.com>
Diffstat (limited to 'drivers/pci/pci.h')
| -rw-r--r-- | drivers/pci/pci.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h index fcd81911b127..1186d8be6055 100644 --- a/drivers/pci/pci.h +++ b/drivers/pci/pci.h @@ -253,6 +253,16 @@ bool pci_bus_clip_resource(struct pci_dev *dev, int idx); void pci_reassigndev_resource_alignment(struct pci_dev *dev); void pci_disable_bridge_window(struct pci_dev *dev); +/* PCIe link information */ +#define PCIE_SPEED2STR(speed) \ + ((speed) == PCIE_SPEED_16_0GT ? "16 GT/s" : \ + (speed) == PCIE_SPEED_8_0GT ? "8 GT/s" : \ + (speed) == PCIE_SPEED_5_0GT ? "5 GT/s" : \ + (speed) == PCIE_SPEED_2_5GT ? "2.5 GT/s" : \ + "Unknown speed") + +enum pci_bus_speed pcie_get_speed_cap(struct pci_dev *dev); + /* Single Root I/O Virtualization */ struct pci_sriov { int pos; /* Capability position */ |