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path: root/drivers/pci/pcie/portdrv_pci.c
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Diffstat (limited to 'drivers/pci/pcie/portdrv_pci.c')
-rw-r--r--drivers/pci/pcie/portdrv_pci.c79
1 files changed, 78 insertions, 1 deletions
diff --git a/drivers/pci/pcie/portdrv_pci.c b/drivers/pci/pcie/portdrv_pci.c
index e9095ee508e3..30bac7ed7c16 100644
--- a/drivers/pci/pcie/portdrv_pci.c
+++ b/drivers/pci/pcie/portdrv_pci.c
@@ -29,6 +29,78 @@ MODULE_LICENSE("GPL");
/* global data */
static const char device_name[] = "pcieport-driver";
+static void pci_save_msi_state(struct pci_dev *dev)
+{
+ struct pcie_port_device_ext *p_ext = pci_get_drvdata(dev);
+ int i = 0, pos;
+ u16 control;
+
+ if ((pos = pci_find_capability(dev, PCI_CAP_ID_MSI)) <= 0)
+ return;
+
+ pci_read_config_dword(dev, pos, &p_ext->saved_msi_config_space[i++]);
+ control = p_ext->saved_msi_config_space[0] >> 16;
+ pci_read_config_dword(dev, pos + PCI_MSI_ADDRESS_LO,
+ &p_ext->saved_msi_config_space[i++]);
+ if (control & PCI_MSI_FLAGS_64BIT) {
+ pci_read_config_dword(dev, pos + PCI_MSI_ADDRESS_HI,
+ &p_ext->saved_msi_config_space[i++]);
+ pci_read_config_dword(dev, pos + PCI_MSI_DATA_64,
+ &p_ext->saved_msi_config_space[i++]);
+ } else
+ pci_read_config_dword(dev, pos + PCI_MSI_DATA_32,
+ &p_ext->saved_msi_config_space[i++]);
+ if (control & PCI_MSI_FLAGS_MASKBIT)
+ pci_read_config_dword(dev, pos + PCI_MSI_MASK_BIT,
+ &p_ext->saved_msi_config_space[i++]);
+}
+
+static void pci_restore_msi_state(struct pci_dev *dev)
+{
+ struct pcie_port_device_ext *p_ext = pci_get_drvdata(dev);
+ int i = 0, pos;
+ u16 control;
+
+ if ((pos = pci_find_capability(dev, PCI_CAP_ID_MSI)) <= 0)
+ return;
+
+ control = p_ext->saved_msi_config_space[i++] >> 16;
+ pci_write_config_word(dev, pos + PCI_MSI_FLAGS, control);
+ pci_write_config_dword(dev, pos + PCI_MSI_ADDRESS_LO,
+ p_ext->saved_msi_config_space[i++]);
+ if (control & PCI_MSI_FLAGS_64BIT) {
+ pci_write_config_dword(dev, pos + PCI_MSI_ADDRESS_HI,
+ p_ext->saved_msi_config_space[i++]);
+ pci_write_config_dword(dev, pos + PCI_MSI_DATA_64,
+ p_ext->saved_msi_config_space[i++]);
+ } else
+ pci_write_config_dword(dev, pos + PCI_MSI_DATA_32,
+ p_ext->saved_msi_config_space[i++]);
+ if (control & PCI_MSI_FLAGS_MASKBIT)
+ pci_write_config_dword(dev, pos + PCI_MSI_MASK_BIT,
+ p_ext->saved_msi_config_space[i++]);
+}
+
+static void pcie_portdrv_save_config(struct pci_dev *dev)
+{
+ struct pcie_port_device_ext *p_ext = pci_get_drvdata(dev);
+
+ pci_save_state(dev);
+ if (p_ext->interrupt_mode == PCIE_PORT_MSI_MODE)
+ pci_save_msi_state(dev);
+}
+
+static void pcie_portdrv_restore_config(struct pci_dev *dev)
+{
+ struct pcie_port_device_ext *p_ext = pci_get_drvdata(dev);
+
+ pci_restore_state(dev);
+ if (p_ext->interrupt_mode == PCIE_PORT_MSI_MODE)
+ pci_restore_msi_state(dev);
+ pci_enable_device(dev);
+ pci_set_master(dev);
+}
+
/*
* pcie_portdrv_probe - Probe PCI-Express port devices
* @dev: PCI-Express port device being probed
@@ -64,16 +136,21 @@ static int __devinit pcie_portdrv_probe (struct pci_dev *dev,
static void pcie_portdrv_remove (struct pci_dev *dev)
{
pcie_port_device_remove(dev);
+ kfree(pci_get_drvdata(dev));
}
#ifdef CONFIG_PM
static int pcie_portdrv_suspend (struct pci_dev *dev, pm_message_t state)
{
- return pcie_port_device_suspend(dev, state);
+ int ret = pcie_port_device_suspend(dev, state);
+
+ pcie_portdrv_save_config(dev);
+ return ret;
}
static int pcie_portdrv_resume (struct pci_dev *dev)
{
+ pcie_portdrv_restore_config(dev);
return pcie_port_device_resume(dev);
}
#endif