diff options
Diffstat (limited to 'drivers/ata/libahci.c')
| -rw-r--r-- | drivers/ata/libahci.c | 97 |
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 " : "" |