#include <asm/byteorder.h>
#include <linux/cdrom.h>
#include <linux/ratelimit.h>
+#include <linux/pm_runtime.h>
#include "libata.h"
#include "libata-transport.h"
ata_force_xfermask(dev);
pio_mask = ata_pack_xfermask(dev->pio_mask, 0, 0);
- dma_mask = ata_pack_xfermask(0, dev->mwdma_mask, dev->udma_mask);
if (libata_dma_mask & mode_mask)
- dma_mask = ata_pack_xfermask(0, dev->mwdma_mask, dev->udma_mask);
+ dma_mask = ata_pack_xfermask(0, dev->mwdma_mask,
+ dev->udma_mask);
else
dma_mask = 0;
}
#ifdef CONFIG_PM
-static int ata_host_request_pm(struct ata_host *host, pm_message_t mesg,
+static int ata_port_request_pm(struct ata_port *ap, pm_message_t mesg,
unsigned int action, unsigned int ehi_flags,
int wait)
{
+ struct ata_link *link;
unsigned long flags;
- int i, rc;
-
- for (i = 0; i < host->n_ports; i++) {
- struct ata_port *ap = host->ports[i];
- struct ata_link *link;
+ int rc;
- /* Previous resume operation might still be in
- * progress. Wait for PM_PENDING to clear.
- */
- if (ap->pflags & ATA_PFLAG_PM_PENDING) {
- ata_port_wait_eh(ap);
- WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING);
- }
+ /* Previous resume operation might still be in
+ * progress. Wait for PM_PENDING to clear.
+ */
+ if (ap->pflags & ATA_PFLAG_PM_PENDING) {
+ ata_port_wait_eh(ap);
+ WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING);
+ }
- /* request PM ops to EH */
- spin_lock_irqsave(ap->lock, flags);
+ /* request PM ops to EH */
+ spin_lock_irqsave(ap->lock, flags);
- ap->pm_mesg = mesg;
- if (wait) {
- rc = 0;
- ap->pm_result = &rc;
- }
+ ap->pm_mesg = mesg;
+ if (wait) {
+ rc = 0;
+ ap->pm_result = &rc;
+ }
- ap->pflags |= ATA_PFLAG_PM_PENDING;
- ata_for_each_link(link, ap, HOST_FIRST) {
- link->eh_info.action |= action;
- link->eh_info.flags |= ehi_flags;
- }
+ ap->pflags |= ATA_PFLAG_PM_PENDING;
+ ata_for_each_link(link, ap, HOST_FIRST) {
+ link->eh_info.action |= action;
+ link->eh_info.flags |= ehi_flags;
+ }
- ata_port_schedule_eh(ap);
+ ata_port_schedule_eh(ap);
- spin_unlock_irqrestore(ap->lock, flags);
+ spin_unlock_irqrestore(ap->lock, flags);
- /* wait and check result */
- if (wait) {
- ata_port_wait_eh(ap);
- WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING);
- if (rc)
- return rc;
- }
+ /* wait and check result */
+ if (wait) {
+ ata_port_wait_eh(ap);
+ WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING);
}
- return 0;
+ return rc;
}
-/**
- * ata_host_suspend - suspend host
- * @host: host to suspend
- * @mesg: PM message
- *
- * Suspend @host. Actual operation is performed by EH. This
- * function requests EH to perform PM operations and waits for EH
- * to finish.
- *
- * LOCKING:
- * Kernel thread context (may sleep).
- *
- * RETURNS:
- * 0 on success, -errno on failure.
- */
-int ata_host_suspend(struct ata_host *host, pm_message_t mesg)
+#define to_ata_port(d) container_of(d, struct ata_port, tdev)
+
+static int ata_port_suspend_common(struct device *dev, pm_message_t mesg)
{
+ struct ata_port *ap = to_ata_port(dev);
unsigned int ehi_flags = ATA_EHI_QUIET;
int rc;
if (mesg.event == PM_EVENT_SUSPEND)
ehi_flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_NO_RECOVERY;
- rc = ata_host_request_pm(host, mesg, 0, ehi_flags, 1);
- if (rc == 0)
- host->dev->power.power_state = mesg;
+ rc = ata_port_request_pm(ap, mesg, 0, ehi_flags, 1);
return rc;
}
+static int ata_port_suspend(struct device *dev)
+{
+ if (pm_runtime_suspended(dev))
+ return 0;
+
+ return ata_port_suspend_common(dev, PMSG_SUSPEND);
+}
+
+static int ata_port_do_freeze(struct device *dev)
+{
+ if (pm_runtime_suspended(dev))
+ pm_runtime_resume(dev);
+
+ return ata_port_suspend_common(dev, PMSG_FREEZE);
+}
+
+static int ata_port_poweroff(struct device *dev)
+{
+ if (pm_runtime_suspended(dev))
+ return 0;
+
+ return ata_port_suspend_common(dev, PMSG_HIBERNATE);
+}
+
+static int ata_port_resume_common(struct device *dev)
+{
+ struct ata_port *ap = to_ata_port(dev);
+ int rc;
+
+ rc = ata_port_request_pm(ap, PMSG_ON, ATA_EH_RESET,
+ ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET, 1);
+ return rc;
+}
+
+static int ata_port_resume(struct device *dev)
+{
+ int rc;
+
+ rc = ata_port_resume_common(dev);
+ if (!rc) {
+ pm_runtime_disable(dev);
+ pm_runtime_set_active(dev);
+ pm_runtime_enable(dev);
+ }
+
+ return rc;
+}
+
+static int ata_port_runtime_idle(struct device *dev)
+{
+ return pm_runtime_suspend(dev);
+}
+
+static const struct dev_pm_ops ata_port_pm_ops = {
+ .suspend = ata_port_suspend,
+ .resume = ata_port_resume,
+ .freeze = ata_port_do_freeze,
+ .thaw = ata_port_resume,
+ .poweroff = ata_port_poweroff,
+ .restore = ata_port_resume,
+
+ .runtime_suspend = ata_port_suspend,
+ .runtime_resume = ata_port_resume_common,
+ .runtime_idle = ata_port_runtime_idle,
+};
+
+/**
+ * ata_host_suspend - suspend host
+ * @host: host to suspend
+ * @mesg: PM message
+ *
+ * Suspend @host. Actual operation is performed by port suspend.
+ */
+int ata_host_suspend(struct ata_host *host, pm_message_t mesg)
+{
+ host->dev->power.power_state = mesg;
+ return 0;
+}
+
/**
* ata_host_resume - resume host
* @host: host to resume
*
- * Resume @host. Actual operation is performed by EH. This
- * function requests EH to perform PM operations and returns.
- * Note that all resume operations are performed parallelly.
- *
- * LOCKING:
- * Kernel thread context (may sleep).
+ * Resume @host. Actual operation is performed by port resume.
*/
void ata_host_resume(struct ata_host *host)
{
- ata_host_request_pm(host, PMSG_ON, ATA_EH_RESET,
- ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET, 0);
host->dev->power.power_state = PMSG_ON;
}
#endif
+struct device_type ata_port_type = {
+ .name = "ata_port",
+#ifdef CONFIG_PM
+ .pm = &ata_port_pm_ops,
+#endif
+};
+
/**
* ata_dev_init - Initialize an ata_device structure
* @dev: Device structure to initialize
projects / karo-tx-linux.git / blobdiff