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PCI: Bring the PCIe speed to MBps logic to new pcie_dev_speed_mbps()

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Bring the switch case in pcie_link_speed_mbps() to new function to
the header file so that it can be used in other places like
in controller driver.

Link: https://lore.kernel.org/linux-pci/20240619-opp_support-v15-3-aa769a2173a3@quicinc.com
Signed-off-by: Krishna chaitanya chundru <quic_krichai@quicinc.com>
Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
This commit is contained in:
Krishna chaitanya chundru 2024-06-19 20:41:12 +05:30 committed by Bjorn Helgaas
parent 980136d1c2
commit 100ae5d77f
2 changed files with 23 additions and 18 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
drivers/pci/pci.c
View File

@ -6020,24 +6020,7 @@ int pcie_link_speed_mbps(struct pci_dev *pdev)
if (err)
return err;
switch (to_pcie_link_speed(lnksta)) {
case PCIE_SPEED_2_5GT:
return 2500;
case PCIE_SPEED_5_0GT:
return 5000;
case PCIE_SPEED_8_0GT:
return 8000;
case PCIE_SPEED_16_0GT:
return 16000;
case PCIE_SPEED_32_0GT:
return 32000;
case PCIE_SPEED_64_0GT:
return 64000;
default:
break;
}
return -EINVAL;
return pcie_dev_speed_mbps(to_pcie_link_speed(lnksta));
}
EXPORT_SYMBOL(pcie_link_speed_mbps);

22
drivers/pci/pci.h
View File

@ -290,6 +290,28 @@ void pci_bus_put(struct pci_bus *bus);
(speed) == PCIE_SPEED_2_5GT ? 2500*8/10 : \
0)
static inline int pcie_dev_speed_mbps(enum pci_bus_speed speed)
{
switch (speed) {
case PCIE_SPEED_2_5GT:
return 2500;
case PCIE_SPEED_5_0GT:
return 5000;
case PCIE_SPEED_8_0GT:
return 8000;
case PCIE_SPEED_16_0GT:
return 16000;
case PCIE_SPEED_32_0GT:
return 32000;
case PCIE_SPEED_64_0GT:
return 64000;
default:
break;
}
return -EINVAL;
}
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);