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path: root/drivers/ata/libahci.c
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Diffstat (limited to 'drivers/ata/libahci.c')
-rw-r--r--drivers/ata/libahci.c97
1 files changed, 96 insertions, 1 deletions
diff --git a/drivers/ata/libahci.c b/drivers/ata/libahci.c
index 555c07afa05b..4201e535a8c8 100644
--- a/drivers/ata/libahci.c
+++ b/drivers/ata/libahci.c
@@ -45,6 +45,7 @@
#include <scsi/scsi_cmnd.h>
#include <linux/libata.h>
#include "ahci.h"
+#include "libata.h"
static int ahci_skip_host_reset;
int ahci_ignore_sss;
@@ -76,6 +77,7 @@ static void ahci_qc_prep(struct ata_queued_cmd *qc);
static int ahci_pmp_qc_defer(struct ata_queued_cmd *qc);
static void ahci_freeze(struct ata_port *ap);
static void ahci_thaw(struct ata_port *ap);
+static void ahci_set_aggressive_devslp(struct ata_port *ap, bool sleep);
static void ahci_enable_fbs(struct ata_port *ap);
static void ahci_disable_fbs(struct ata_port *ap);
static void ahci_pmp_attach(struct ata_port *ap);
@@ -193,6 +195,10 @@ module_param(ahci_em_messages, int, 0444);
MODULE_PARM_DESC(ahci_em_messages,
"AHCI Enclosure Management Message control (0 = off, 1 = on)");
+int devslp_idle_timeout = 1000; /* device sleep idle timeout in ms */
+module_param(devslp_idle_timeout, int, 0644);
+MODULE_PARM_DESC(devslp_idle_timeout, "device sleep idle timeout");
+
static void ahci_enable_ahci(void __iomem *mmio)
{
int i;
@@ -702,6 +708,16 @@ static int ahci_set_lpm(struct ata_link *link, enum ata_lpm_policy policy,
}
}
+ /* set aggressive device sleep */
+ if ((hpriv->cap2 & HOST_CAP2_SDS) &&
+ (hpriv->cap2 & HOST_CAP2_SADM) &&
+ (link->device->flags & ATA_DFLAG_DEVSLP)) {
+ if (policy == ATA_LPM_MIN_POWER)
+ ahci_set_aggressive_devslp(ap, true);
+ else
+ ahci_set_aggressive_devslp(ap, false);
+ }
+
if (policy == ATA_LPM_MAX_POWER) {
sata_link_scr_lpm(link, policy, false);
@@ -1890,6 +1906,81 @@ static void ahci_post_internal_cmd(struct ata_queued_cmd *qc)
ahci_kick_engine(ap);
}
+static void ahci_set_aggressive_devslp(struct ata_port *ap, bool sleep)
+{
+ void __iomem *port_mmio = ahci_port_base(ap);
+ struct ata_device *dev = ap->link.device;
+ u32 devslp, dm, dito, mdat, deto;
+ int rc;
+ unsigned int err_mask;
+
+ devslp = readl(port_mmio + PORT_DEVSLP);
+ if (!(devslp & PORT_DEVSLP_DSP)) {
+ dev_err(ap->host->dev, "port does not support device sleep\n");
+ return;
+ }
+
+ /* disable device sleep */
+ if (!sleep) {
+ if (devslp & PORT_DEVSLP_ADSE) {
+ writel(devslp & ~PORT_DEVSLP_ADSE,
+ port_mmio + PORT_DEVSLP);
+ err_mask = ata_dev_set_feature(dev,
+ SETFEATURES_SATA_DISABLE,
+ SATA_DEVSLP);
+ if (err_mask && err_mask != AC_ERR_DEV)
+ ata_dev_warn(dev, "failed to disable DEVSLP\n");
+ }
+ return;
+ }
+
+ /* device sleep was already enabled */
+ if (devslp & PORT_DEVSLP_ADSE)
+ return;
+
+ /* set DITO, MDAT, DETO and enable DevSlp, need to stop engine first */
+ rc = ahci_stop_engine(ap);
+ if (rc)
+ return;
+
+ dm = (devslp & PORT_DEVSLP_DM_MASK) >> PORT_DEVSLP_DM_OFFSET;
+ dito = devslp_idle_timeout / (dm + 1);
+ if (dito > 0x3ff)
+ dito = 0x3ff;
+
+ /* Use the nominal value 10 ms if the read MDAT is zero,
+ * the nominal value of DETO is 20 ms.
+ */
+ if (dev->sata_settings[ATA_LOG_DEVSLP_VALID] &
+ ATA_LOG_DEVSLP_VALID_MASK) {
+ mdat = dev->sata_settings[ATA_LOG_DEVSLP_MDAT] &
+ ATA_LOG_DEVSLP_MDAT_MASK;
+ if (!mdat)
+ mdat = 10;
+ deto = dev->sata_settings[ATA_LOG_DEVSLP_DETO];
+ if (!deto)
+ deto = 20;
+ } else {
+ mdat = 10;
+ deto = 20;
+ }
+
+ devslp |= ((dito << PORT_DEVSLP_DITO_OFFSET) |
+ (mdat << PORT_DEVSLP_MDAT_OFFSET) |
+ (deto << PORT_DEVSLP_DETO_OFFSET) |
+ PORT_DEVSLP_ADSE);
+ writel(devslp, port_mmio + PORT_DEVSLP);
+
+ ahci_start_engine(ap);
+
+ /* enable device sleep feature for the drive */
+ err_mask = ata_dev_set_feature(dev,
+ SETFEATURES_SATA_ENABLE,
+ SATA_DEVSLP);
+ if (err_mask && err_mask != AC_ERR_DEV)
+ ata_dev_warn(dev, "failed to enable DEVSLP\n");
+}
+
static void ahci_enable_fbs(struct ata_port *ap)
{
struct ahci_port_priv *pp = ap->private_data;
@@ -2164,7 +2255,8 @@ void ahci_print_info(struct ata_host *host, const char *scc_s)
"flags: "
"%s%s%s%s%s%s%s"
"%s%s%s%s%s%s%s"
- "%s%s%s%s%s%s\n"
+ "%s%s%s%s%s%s%s"
+ "%s%s\n"
,
cap & HOST_CAP_64 ? "64bit " : "",
@@ -2184,6 +2276,9 @@ void ahci_print_info(struct ata_host *host, const char *scc_s)
cap & HOST_CAP_CCC ? "ccc " : "",
cap & HOST_CAP_EMS ? "ems " : "",
cap & HOST_CAP_SXS ? "sxs " : "",
+ cap2 & HOST_CAP2_DESO ? "deso " : "",
+ cap2 & HOST_CAP2_SADM ? "sadm " : "",
+ cap2 & HOST_CAP2_SDS ? "sds " : "",
cap2 & HOST_CAP2_APST ? "apst " : "",
cap2 & HOST_CAP2_NVMHCI ? "nvmp " : "",
cap2 & HOST_CAP2_BOH ? "boh " : ""