Kernel/linux-next
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git synced 2024-12-28 16:52:18 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

Merge branch 'for-linus'

Browse Source 
* for-linus:
  PCI/bwctrl: Enable only if more than one speed is supported
  PCI: Honor Max Link Speed when determining supported speeds
This commit is contained in:
Krzysztof Wilczyński 2024-12-19 19:09:31 +00:00
commit 5f7267109a
No known key found for this signature in database
GPG Key ID: 7C64768D3DE334E7
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

@ -6257,12 +6257,14 @@ 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;
}