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| author | Bjorn Helgaas <bhelgaas@google.com> | 2020-04-02 14:26:32 -0500 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2020-04-02 14:26:32 -0500 |
| commit | eb81b249ba059443916d6cc0cfa3e1987aa938d9 (patch) | |
| tree | a82772f09a64050df12471ade29b8e7449a502ed /drivers/pci/pci.h | |
| parent | 4ea40c380dd597587cb232b4d132202552dd09bc (diff) | |
| parent | 757bfaa2c3515803dde9a6728bbf8c8a3c5f098a (diff) | |
| download | linux-stable-eb81b249ba059443916d6cc0cfa3e1987aa938d9.tar.gz linux-stable-eb81b249ba059443916d6cc0cfa3e1987aa938d9.tar.bz2 linux-stable-eb81b249ba059443916d6cc0cfa3e1987aa938d9.zip | |
Merge branch 'pci/enumeration'
- Add PCIe 32 GT/s speed decoding for sysfs "max_link_speed" and dmesg
notes about available bandwidth (Yicong Yang)
- Simplify and unify PCI bus/link speed reporting (Yicong Yang)
* pci/enumeration:
PCI: Add PCIE_LNKCAP2_SLS2SPEED() macro
PCI: Use pci_speed_string() for all PCI/PCI-X/PCIe strings
PCI: Add pci_speed_string()
PCI: Add 32 GT/s decoding in some macros
Diffstat (limited to 'drivers/pci/pci.h')
| -rw-r--r-- | drivers/pci/pci.h | 19 |
1 files changed, 11 insertions, 8 deletions
diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h index bd46f23e3db1..6d3f75867106 100644 --- a/drivers/pci/pci.h +++ b/drivers/pci/pci.h @@ -292,22 +292,25 @@ void pci_disable_bridge_window(struct pci_dev *dev); struct pci_bus *pci_bus_get(struct pci_bus *bus); void pci_bus_put(struct pci_bus *bus); -/* 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") +/* PCIe link information from Link Capabilities 2 */ +#define PCIE_LNKCAP2_SLS2SPEED(lnkcap2) \ + ((lnkcap2) & PCI_EXP_LNKCAP2_SLS_32_0GB ? PCIE_SPEED_32_0GT : \ + (lnkcap2) & PCI_EXP_LNKCAP2_SLS_16_0GB ? PCIE_SPEED_16_0GT : \ + (lnkcap2) & PCI_EXP_LNKCAP2_SLS_8_0GB ? PCIE_SPEED_8_0GT : \ + (lnkcap2) & PCI_EXP_LNKCAP2_SLS_5_0GB ? PCIE_SPEED_5_0GT : \ + (lnkcap2) & PCI_EXP_LNKCAP2_SLS_2_5GB ? PCIE_SPEED_2_5GT : \ + PCI_SPEED_UNKNOWN) /* PCIe speed to Mb/s reduced by encoding overhead */ #define PCIE_SPEED2MBS_ENC(speed) \ - ((speed) == PCIE_SPEED_16_0GT ? 16000*128/130 : \ + ((speed) == PCIE_SPEED_32_0GT ? 32000*128/130 : \ + (speed) == PCIE_SPEED_16_0GT ? 16000*128/130 : \ (speed) == PCIE_SPEED_8_0GT ? 8000*128/130 : \ (speed) == PCIE_SPEED_5_0GT ? 5000*8/10 : \ (speed) == PCIE_SPEED_2_5GT ? 2500*8/10 : \ 0) +const char *pci_speed_string(enum pci_bus_speed speed); enum pci_bus_speed pcie_get_speed_cap(struct pci_dev *dev); enum pcie_link_width pcie_get_width_cap(struct pci_dev *dev); u32 pcie_bandwidth_capable(struct pci_dev *dev, enum pci_bus_speed *speed, |