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PCI: Add decoding for 16 GT/s link speed

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PCIe 4.0 defines the 16.0 GT/s link speed.  Links can run at that speed
without any Linux changes, but previously their sysfs "max_link_speed" and
"current_link_speed" files contained "Unknown speed", not the expected
"16.0 GT/s".

Add decoding for the new 16 GT/s link speed.

Signed-off-by: Jay Fang <f.fangjian@huawei.com>
[bhelgaas: add PCI_EXP_LNKCAP2_SLS_16_0GB]
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Dongdong Liu <liudongdong3@huawei.com>
This commit is contained in:
Jay Fang
2018-03-12 17:13:32 +08:00
committed by Bjorn Helgaas
parent 7928b2cbe5
commit 1acfb9b7ee
5 changed files with 14 additions and 3 deletions
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include/linux/pci.h
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@@ -256,6 +256,7 @@ enum pci_bus_speed {
PCIE_SPEED_2_5GT = 0x14,
PCIE_SPEED_5_0GT = 0x15,
PCIE_SPEED_8_0GT = 0x16,
PCIE_SPEED_16_0GT = 0x17,
PCI_SPEED_UNKNOWN = 0xff,
};