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path: root/drivers/pci/probe.c
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Diffstat (limited to 'drivers/pci/probe.c')
-rw-r--r--drivers/pci/probe.c31
1 files changed, 28 insertions, 3 deletions
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index 3f64b0d78911..e164b5c9f0f0 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -1558,6 +1558,21 @@ static void program_hpp_type1(struct pci_dev *dev, struct hpp_type1 *hpp)
dev_warn(&dev->dev, "PCI-X settings not supported\n");
}
+static bool pcie_root_rcb_set(struct pci_dev *dev)
+{
+ struct pci_dev *rp = pcie_find_root_port(dev);
+ u16 lnkctl;
+
+ if (!rp)
+ return false;
+
+ pcie_capability_read_word(rp, PCI_EXP_LNKCTL, &lnkctl);
+ if (lnkctl & PCI_EXP_LNKCTL_RCB)
+ return true;
+
+ return false;
+}
+
static void program_hpp_type2(struct pci_dev *dev, struct hpp_type2 *hpp)
{
int pos;
@@ -1587,9 +1602,20 @@ static void program_hpp_type2(struct pci_dev *dev, struct hpp_type2 *hpp)
~hpp->pci_exp_devctl_and, hpp->pci_exp_devctl_or);
/* Initialize Link Control Register */
- if (pcie_cap_has_lnkctl(dev))
+ if (pcie_cap_has_lnkctl(dev)) {
+
+ /*
+ * If the Root Port supports Read Completion Boundary of
+ * 128, set RCB to 128. Otherwise, clear it.
+ */
+ hpp->pci_exp_lnkctl_and |= PCI_EXP_LNKCTL_RCB;
+ hpp->pci_exp_lnkctl_or &= ~PCI_EXP_LNKCTL_RCB;
+ if (pcie_root_rcb_set(dev))
+ hpp->pci_exp_lnkctl_or |= PCI_EXP_LNKCTL_RCB;
+
pcie_capability_clear_and_set_word(dev, PCI_EXP_LNKCTL,
~hpp->pci_exp_lnkctl_and, hpp->pci_exp_lnkctl_or);
+ }
/* Find Advanced Error Reporting Enhanced Capability */
pos = pci_find_ext_capability(dev, PCI_EXT_CAP_ID_ERR);
@@ -1857,8 +1883,7 @@ static void pci_dma_configure(struct pci_dev *dev)
if (attr == DEV_DMA_NOT_SUPPORTED)
dev_warn(&dev->dev, "DMA not supported.\n");
else
- arch_setup_dma_ops(&dev->dev, 0, 0, NULL,
- attr == DEV_DMA_COHERENT);
+ acpi_dma_configure(&dev->dev, attr);
}
pci_put_host_bridge_device(bridge);