Kernel/linux-next
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git synced 2024-12-29 17:22:07 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/pci/pci.git

Browse Source
This commit is contained in:
Stephen Rothwell 2024-12-20 09:41:43 +11:00
commit b70996809f
2 changed files with 7 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
drivers/pci/pci.c
View File

@ -6232,12 +6232,14 @@ u8 pcie_get_supported_speeds(struct pci_dev *dev)
pcie_capability_read_dword(dev, PCI_EXP_LNKCAP2, &lnkcap2);
speeds = lnkcap2 & PCI_EXP_LNKCAP2_SLS;
/* Ignore speeds higher than Max Link Speed */
pcie_capability_read_dword(dev, PCI_EXP_LNKCAP, &lnkcap);
speeds &= GENMASK(lnkcap & PCI_EXP_LNKCAP_SLS, 0);
/* PCIe r3.0-compliant */
if (speeds)
return speeds;
pcie_capability_read_dword(dev, PCI_EXP_LNKCAP, &lnkcap);
/* Synthesize from the Max Link Speed field */
if ((lnkcap & PCI_EXP_LNKCAP_SLS) == PCI_EXP_LNKCAP_SLS_5_0GB)
speeds = PCI_EXP_LNKCAP2_SLS_5_0GB | PCI_EXP_LNKCAP2_SLS_2_5GB;

4
drivers/pci/pcie/portdrv.c
View File

@ -265,12 +265,14 @@ static int get_port_device_capability(struct pci_dev *dev)
(pcie_ports_dpc_native || (services & PCIE_PORT_SERVICE_AER)))
services |= PCIE_PORT_SERVICE_DPC;
/* Enable bandwidth control if more than one speed is supported. */
if (pci_pcie_type(dev) == PCI_EXP_TYPE_DOWNSTREAM ||
pci_pcie_type(dev) == PCI_EXP_TYPE_ROOT_PORT) {
u32 linkcap;
pcie_capability_read_dword(dev, PCI_EXP_LNKCAP, &linkcap);
if (linkcap & PCI_EXP_LNKCAP_LBNC)
if (linkcap & PCI_EXP_LNKCAP_LBNC &&
hweight8(dev->supported_speeds) > 1)
services |= PCIE_PORT_SERVICE_BWCTRL;
}