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| author | Gustavo Pimentel <Gustavo.Pimentel@synopsys.com> | 2020-11-18 23:49:20 +0100 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2020-11-20 12:35:27 -0600 |
| commit | 341917490d7d68d2f7267a265b8820fc3f8ead1b (patch) | |
| tree | ca48ff6435e4cadf0b01da73e3566ce911f6927c /drivers/pci/probe.c | |
| parent | f8394f232b1eab649ce2df5c5f15b0e528c92091 (diff) | |
| download | lwn-341917490d7d68d2f7267a265b8820fc3f8ead1b.tar.gz lwn-341917490d7d68d2f7267a265b8820fc3f8ead1b.zip | |
PCI: Decode PCIe 64 GT/s link speed
PCIe r6.0, sec 7.5.3.18, defines a new 64.0 GT/s bit in the Supported Link
Speeds Vector of Link Capabilities 2.
This patch does not affect the speed of the link, which should be
negotiated automatically by the hardware; it only adds decoding when
showing the speed to the user.
Decode this new speed. Previously, reading the speed of a link operating
at this speed showed "Unknown speed" instead of "64.0 GT/s".
Link: https://lore.kernel.org/r/aaaab33fe18975e123a84aebce2adb85f44e2bbe.1605739760.git.gustavo.pimentel@synopsys.com
Signed-off-by: Gustavo Pimentel <gustavo.pimentel@synopsys.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Krzysztof Wilczyński <kw@linux.com>
Diffstat (limited to 'drivers/pci/probe.c')
| -rw-r--r-- | drivers/pci/probe.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index 4289030b0fff..fe2e00f5fc4c 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -677,7 +677,7 @@ const unsigned char pcie_link_speed[] = { PCIE_SPEED_8_0GT, /* 3 */ PCIE_SPEED_16_0GT, /* 4 */ PCIE_SPEED_32_0GT, /* 5 */ - PCI_SPEED_UNKNOWN, /* 6 */ + PCIE_SPEED_64_0GT, /* 6 */ PCI_SPEED_UNKNOWN, /* 7 */ PCI_SPEED_UNKNOWN, /* 8 */ PCI_SPEED_UNKNOWN, /* 9 */ @@ -719,6 +719,7 @@ const char *pci_speed_string(enum pci_bus_speed speed) "8.0 GT/s PCIe", /* 0x16 */ "16.0 GT/s PCIe", /* 0x17 */ "32.0 GT/s PCIe", /* 0x18 */ + "64.0 GT/s PCIe", /* 0x19 */ }; if (speed < ARRAY_SIZE(speed_strings)) |