diff options
Diffstat (limited to 'drivers/pci/pcie/ptm.c')
| -rw-r--r-- | drivers/pci/pcie/ptm.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/drivers/pci/pcie/ptm.c b/drivers/pci/pcie/ptm.c index 65e4b008be00..ed0f9691e7d1 100644 --- a/drivers/pci/pcie/ptm.c +++ b/drivers/pci/pcie/ptm.c @@ -81,6 +81,11 @@ void pci_ptm_init(struct pci_dev *dev) dev->ptm_granularity = 0; } + if (cap & PCI_PTM_CAP_RES) + dev->ptm_responder = 1; + if (cap & PCI_PTM_CAP_REQ) + dev->ptm_requester = 1; + if (pci_pcie_type(dev) == PCI_EXP_TYPE_ROOT_PORT || pci_pcie_type(dev) == PCI_EXP_TYPE_UPSTREAM) pci_enable_ptm(dev, NULL); @@ -144,6 +149,24 @@ static int __pci_enable_ptm(struct pci_dev *dev) return -EINVAL; } + switch (pci_pcie_type(dev)) { + case PCI_EXP_TYPE_ROOT_PORT: + if (!dev->ptm_root) + return -EINVAL; + break; + case PCI_EXP_TYPE_UPSTREAM: + if (!dev->ptm_responder) + return -EINVAL; + break; + case PCI_EXP_TYPE_ENDPOINT: + case PCI_EXP_TYPE_LEG_END: + if (!dev->ptm_requester) + return -EINVAL; + break; + default: + return -EINVAL; + } + pci_read_config_dword(dev, ptm + PCI_PTM_CTRL, &ctrl); ctrl |= PCI_PTM_CTRL_ENABLE; |