[PATCH v11 5/6] PCI: Bring the PCIe speed to MBps logic to new pcie_link_speed_to_mbps()

Krishna chaitanya chundru
2024-04-23T09:08:39Z

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.

Signed-off-by: Krishna chaitanya chundru <quic_krichai@quicinc.com>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
---
drivers/pci/pci.c | 19 +------------------
drivers/pci/pci.h | 22 ++++++++++++++++++++++
2 files changed, 23 insertions(+), 18 deletions(-)

diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index e5f243dd4288..40487b86a75e 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -5922,24 +5922,7 @@ 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_link_speed_to_mbps(to_pcie_link_speed(lnksta));
}
EXPORT_SYMBOL(pcie_link_speed_mbps);

diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h
index 17fed1846847..4de10087523e 100644
--- a/drivers/pci/pci.h
+++ b/drivers/pci/pci.h
@@ -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_link_speed_to_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);

--
2.42.0