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Diffstat (limited to 'drivers/ata/ahci.c')
-rw-r--r--drivers/ata/ahci.c73
1 files changed, 61 insertions, 12 deletions
diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
index 4ac1bb39a9df..196f0287cba1 100644
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -85,6 +85,7 @@ enum board_ids {
};
static int ahci_init_one(struct pci_dev *pdev, const struct pci_device_id *ent);
+static void ahci_remove_one(struct pci_dev *dev);
static int ahci_vt8251_hardreset(struct ata_link *link, unsigned int *class,
unsigned long deadline);
static int ahci_avn_hardreset(struct ata_link *link, unsigned int *class,
@@ -93,10 +94,14 @@ static void ahci_mcp89_apple_enable(struct pci_dev *pdev);
static bool is_mcp89_apple(struct pci_dev *pdev);
static int ahci_p5wdh_hardreset(struct ata_link *link, unsigned int *class,
unsigned long deadline);
+#ifdef CONFIG_PM
+static int ahci_pci_device_runtime_suspend(struct device *dev);
+static int ahci_pci_device_runtime_resume(struct device *dev);
#ifdef CONFIG_PM_SLEEP
static int ahci_pci_device_suspend(struct device *dev);
static int ahci_pci_device_resume(struct device *dev);
#endif
+#endif /* CONFIG_PM */
static struct scsi_host_template ahci_sht = {
AHCI_SHT("ahci"),
@@ -559,13 +564,15 @@ static const struct pci_device_id ahci_pci_tbl[] = {
static const struct dev_pm_ops ahci_pci_pm_ops = {
SET_SYSTEM_SLEEP_PM_OPS(ahci_pci_device_suspend, ahci_pci_device_resume)
+ SET_RUNTIME_PM_OPS(ahci_pci_device_runtime_suspend,
+ ahci_pci_device_runtime_resume, NULL)
};
static struct pci_driver ahci_pci_driver = {
.name = DRV_NAME,
.id_table = ahci_pci_tbl,
.probe = ahci_init_one,
- .remove = ata_pci_remove_one,
+ .remove = ahci_remove_one,
.driver = {
.pm = &ahci_pci_pm_ops,
},
@@ -796,21 +803,13 @@ static int ahci_avn_hardreset(struct ata_link *link, unsigned int *class,
}
-#ifdef CONFIG_PM_SLEEP
-static int ahci_pci_device_suspend(struct device *dev)
+#ifdef CONFIG_PM
+static void ahci_pci_disable_interrupts(struct ata_host *host)
{
- struct pci_dev *pdev = to_pci_dev(dev);
- struct ata_host *host = pci_get_drvdata(pdev);
struct ahci_host_priv *hpriv = host->private_data;
void __iomem *mmio = hpriv->mmio;
u32 ctl;
- if (hpriv->flags & AHCI_HFLAG_NO_SUSPEND) {
- dev_err(&pdev->dev,
- "BIOS update required for suspend/resume\n");
- return -EIO;
- }
-
/* AHCI spec rev1.1 section 8.3.3:
* Software must disable interrupts prior to requesting a
* transition of the HBA to D3 state.
@@ -819,7 +818,44 @@ static int ahci_pci_device_suspend(struct device *dev)
ctl &= ~HOST_IRQ_EN;
writel(ctl, mmio + HOST_CTL);
readl(mmio + HOST_CTL); /* flush */
+}
+
+static int ahci_pci_device_runtime_suspend(struct device *dev)
+{
+ struct pci_dev *pdev = to_pci_dev(dev);
+ struct ata_host *host = pci_get_drvdata(pdev);
+ ahci_pci_disable_interrupts(host);
+ return 0;
+}
+
+static int ahci_pci_device_runtime_resume(struct device *dev)
+{
+ struct pci_dev *pdev = to_pci_dev(dev);
+ struct ata_host *host = pci_get_drvdata(pdev);
+ int rc;
+
+ rc = ahci_pci_reset_controller(host);
+ if (rc)
+ return rc;
+ ahci_pci_init_controller(host);
+ return 0;
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int ahci_pci_device_suspend(struct device *dev)
+{
+ struct pci_dev *pdev = to_pci_dev(dev);
+ struct ata_host *host = pci_get_drvdata(pdev);
+ struct ahci_host_priv *hpriv = host->private_data;
+
+ if (hpriv->flags & AHCI_HFLAG_NO_SUSPEND) {
+ dev_err(&pdev->dev,
+ "BIOS update required for suspend/resume\n");
+ return -EIO;
+ }
+
+ ahci_pci_disable_interrupts(host);
return ata_host_suspend(host, PMSG_SUSPEND);
}
@@ -847,6 +883,8 @@ static int ahci_pci_device_resume(struct device *dev)
}
#endif
+#endif /* CONFIG_PM */
+
static int ahci_configure_dma_masks(struct pci_dev *pdev, int using_dac)
{
int rc;
@@ -1666,7 +1704,18 @@ static int ahci_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
pci_set_master(pdev);
- return ahci_host_activate(host, &ahci_sht);
+ rc = ahci_host_activate(host, &ahci_sht);
+ if (rc)
+ return rc;
+
+ pm_runtime_put_noidle(&pdev->dev);
+ return 0;
+}
+
+static void ahci_remove_one(struct pci_dev *pdev)
+{
+ pm_runtime_get_noresume(&pdev->dev);
+ ata_pci_remove_one(pdev);
}
module_pci_driver(ahci_pci_driver);