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>

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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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6

drivers/pci/pci-sysfs.c

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2

drivers/pci/probe.c

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1

drivers/pci/slot.c

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1

include/linux/pci.h

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7

include/uapi/linux/pci_regs.h

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