Commit 100ae5d7 authored by Krishna chaitanya chundru's avatar Krishna chaitanya chundru Committed by Bjorn Helgaas
Browse files

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

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: default avatarKrishna chaitanya chundru <quic_krichai@quicinc.com>
Signed-off-by: default avatarKrzysztof Wilczyński <kwilczynski@kernel.org>
Signed-off-by: default avatarBjorn Helgaas <bhelgaas@google.com>
Reviewed-by: default avatarManivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
parent 980136d1

drivers/pci/pci.c

+1 −18
Original line number Diff line number Diff line
@@ -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);

drivers/pci/pci.h

+22 −0
Original line number Diff line number Diff line
@@ -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);