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-rw-r--r--drivers/ata/ahci.h14
-rw-r--r--drivers/ata/libahci.c97
-rw-r--r--drivers/ata/libata-core.c29
-rw-r--r--drivers/ata/libata-eh.c12
-rw-r--r--drivers/ata/libata.h2
5 files changed, 143 insertions, 11 deletions
diff --git a/drivers/ata/ahci.h b/drivers/ata/ahci.h
index 57eb1c2..6441cbe 100644
--- a/drivers/ata/ahci.h
+++ b/drivers/ata/ahci.h
@@ -115,6 +115,9 @@ enum {
HOST_CAP2_BOH = (1 << 0), /* BIOS/OS handoff supported */
HOST_CAP2_NVMHCI = (1 << 1), /* NVMHCI supported */
HOST_CAP2_APST = (1 << 2), /* Automatic partial to slumber */
+ HOST_CAP2_SDS = (1 << 3), /* Support device sleep */
+ HOST_CAP2_SADM = (1 << 4), /* Support aggressive DevSlp */
+ HOST_CAP2_DESO = (1 << 5), /* DevSlp from slumber only */
/* registers for each SATA port */
PORT_LST_ADDR = 0x00, /* command list DMA addr */
@@ -133,6 +136,7 @@ enum {
PORT_SCR_ACT = 0x34, /* SATA phy register: SActive */
PORT_SCR_NTF = 0x3c, /* SATA phy register: SNotification */
PORT_FBS = 0x40, /* FIS-based Switching */
+ PORT_DEVSLP = 0x44, /* device sleep */
/* PORT_IRQ_{STAT,MASK} bits */
PORT_IRQ_COLD_PRES = (1 << 31), /* cold presence detect */
@@ -186,6 +190,7 @@ enum {
PORT_CMD_ICC_PARTIAL = (0x2 << 28), /* Put i/f in partial state */
PORT_CMD_ICC_SLUMBER = (0x6 << 28), /* Put i/f in slumber state */
+ /* PORT_FBS bits */
PORT_FBS_DWE_OFFSET = 16, /* FBS device with error offset */
PORT_FBS_ADO_OFFSET = 12, /* FBS active dev optimization offset */
PORT_FBS_DEV_OFFSET = 8, /* FBS device to issue offset */
@@ -194,6 +199,15 @@ enum {
PORT_FBS_DEC = (1 << 1), /* FBS device error clear */
PORT_FBS_EN = (1 << 0), /* Enable FBS */
+ /* PORT_DEVSLP bits */
+ PORT_DEVSLP_DM_OFFSET = 25, /* DITO multiplier offset */
+ PORT_DEVSLP_DM_MASK = (0xf << 25), /* DITO multiplier mask */
+ PORT_DEVSLP_DITO_OFFSET = 15, /* DITO offset */
+ PORT_DEVSLP_MDAT_OFFSET = 10, /* Minimum assertion time */
+ PORT_DEVSLP_DETO_OFFSET = 2, /* DevSlp exit timeout */
+ PORT_DEVSLP_DSP = (1 << 1), /* DevSlp present */
+ PORT_DEVSLP_ADSE = (1 << 0), /* Aggressive DevSlp enable */
+
/* hpriv->flags bits */
#define AHCI_HFLAGS(flags) .private_data = (void *)(flags)
diff --git a/drivers/ata/libahci.c b/drivers/ata/libahci.c
index 555c07a..4201e53 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 " : ""
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 5eee1c1..25daf39 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -2155,6 +2155,7 @@ int ata_dev_configure(struct ata_device *dev)
int print_info = ehc->i.flags & ATA_EHI_PRINTINFO;
const u16 *id = dev->id;
unsigned long xfer_mask;
+ unsigned int err_mask;
char revbuf[7]; /* XYZ-99\0 */
char fwrevbuf[ATA_ID_FW_REV_LEN+1];
char modelbuf[ATA_ID_PROD_LEN+1];
@@ -2323,6 +2324,26 @@ int ata_dev_configure(struct ata_device *dev)
}
}
+ /* check and mark DevSlp capability */
+ if (ata_id_has_devslp(dev->id))
+ dev->flags |= ATA_DFLAG_DEVSLP;
+
+ /* Obtain SATA Settings page from Identify Device Data Log,
+ * which contains DevSlp timing variables etc.
+ * Exclude old devices with ata_id_has_ncq()
+ */
+ if (ata_id_has_ncq(dev->id)) {
+ err_mask = ata_read_log_page(dev,
+ ATA_LOG_SATA_ID_DEV_DATA,
+ ATA_LOG_SATA_SETTINGS,
+ dev->sata_settings,
+ 1);
+ if (err_mask)
+ ata_dev_dbg(dev,
+ "failed to get Identify Device Data, Emask 0x%x\n",
+ err_mask);
+ }
+
dev->cdb_len = 16;
}
@@ -2351,8 +2372,6 @@ int ata_dev_configure(struct ata_device *dev)
(ap->flags & ATA_FLAG_AN) && ata_id_has_atapi_AN(id) &&
(!sata_pmp_attached(ap) ||
sata_scr_read(&ap->link, SCR_NOTIFICATION, &sntf) == 0)) {
- unsigned int err_mask;
-
/* issue SET feature command to turn this on */
err_mask = ata_dev_set_feature(dev,
SETFEATURES_SATA_ENABLE, SATA_AN);
@@ -3598,7 +3617,7 @@ int sata_link_scr_lpm(struct ata_link *link, enum ata_lpm_policy policy,
switch (policy) {
case ATA_LPM_MAX_POWER:
/* disable all LPM transitions */
- scontrol |= (0x3 << 8);
+ scontrol |= (0x7 << 8);
/* initiate transition to active state */
if (spm_wakeup) {
scontrol |= (0x4 << 12);
@@ -3608,12 +3627,12 @@ int sata_link_scr_lpm(struct ata_link *link, enum ata_lpm_policy policy,
case ATA_LPM_MED_POWER:
/* allow LPM to PARTIAL */
scontrol &= ~(0x1 << 8);
- scontrol |= (0x2 << 8);
+ scontrol |= (0x6 << 8);
break;
case ATA_LPM_MIN_POWER:
if (ata_link_nr_enabled(link) > 0)
/* no restrictions on LPM transitions */
- scontrol &= ~(0x3 << 8);
+ scontrol &= ~(0x7 << 8);
else {
/* empty port, power off */
scontrol &= ~0xf;
diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c
index 7d4535e..2659894 100644
--- a/drivers/ata/libata-eh.c
+++ b/drivers/ata/libata-eh.c
@@ -1487,6 +1487,7 @@ static const char *ata_err_string(unsigned int err_mask)
/**
* ata_read_log_page - read a specific log page
* @dev: target device
+ * @log: log to read
* @page: page to read
* @buf: buffer to store read page
* @sectors: number of sectors to read
@@ -1499,17 +1500,18 @@ static const char *ata_err_string(unsigned int err_mask)
* RETURNS:
* 0 on success, AC_ERR_* mask otherwise.
*/
-static unsigned int ata_read_log_page(struct ata_device *dev,
- u8 page, void *buf, unsigned int sectors)
+unsigned int ata_read_log_page(struct ata_device *dev, u8 log,
+ u8 page, void *buf, unsigned int sectors)
{
struct ata_taskfile tf;
unsigned int err_mask;
- DPRINTK("read log page - page %d\n", page);
+ DPRINTK("read log page - log 0x%x, page 0x%x\n", log, page);
ata_tf_init(dev, &tf);
tf.command = ATA_CMD_READ_LOG_EXT;
- tf.lbal = page;
+ tf.lbal = log;
+ tf.lbam = page;
tf.nsect = sectors;
tf.hob_nsect = sectors >> 8;
tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_LBA48 | ATA_TFLAG_DEVICE;
@@ -1545,7 +1547,7 @@ static int ata_eh_read_log_10h(struct ata_device *dev,
u8 csum;
int i;
- err_mask = ata_read_log_page(dev, ATA_LOG_SATA_NCQ, buf, 1);
+ err_mask = ata_read_log_page(dev, ATA_LOG_SATA_NCQ, 0, buf, 1);
if (err_mask)
return -EIO;
diff --git a/drivers/ata/libata.h b/drivers/ata/libata.h
index 50e4dff..7148a58 100644
--- a/drivers/ata/libata.h
+++ b/drivers/ata/libata.h
@@ -165,6 +165,8 @@ extern void ata_eh_about_to_do(struct ata_link *link, struct ata_device *dev,
unsigned int action);
extern void ata_eh_done(struct ata_link *link, struct ata_device *dev,
unsigned int action);
+extern unsigned int ata_read_log_page(struct ata_device *dev, u8 log,
+ u8 page, void *buf, unsigned int sectors);
extern void ata_eh_autopsy(struct ata_port *ap);
const char *ata_get_cmd_descript(u8 command);
extern void ata_eh_report(struct ata_port *ap);
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