return ehc->i.flags & ATA_EHI_PRINTINFO;
}
-static bool ata_sstatus_online(u32 sstatus)
-{
- return (sstatus & 0xf) == 0x3;
-}
-
/**
* ata_link_next - link iteration helper
* @link: the previous link, NULL to start
}
EXPORT_SYMBOL_GPL(ata_dev_pair);
-/**
- * sata_down_spd_limit - adjust SATA spd limit downward
- * @link: Link to adjust SATA spd limit for
- * @spd_limit: Additional limit
- *
- * Adjust SATA spd limit of @link downward. Note that this
- * function only adjusts the limit. The change must be applied
- * using sata_set_spd().
- *
- * If @spd_limit is non-zero, the speed is limited to equal to or
- * lower than @spd_limit if such speed is supported. If
- * @spd_limit is slower than any supported speed, only the lowest
- * supported speed is allowed.
- *
- * LOCKING:
- * Inherited from caller.
- *
- * RETURNS:
- * 0 on success, negative errno on failure
- */
-int sata_down_spd_limit(struct ata_link *link, u32 spd_limit)
-{
- u32 sstatus, spd, mask;
- int rc, bit;
-
- if (!sata_scr_valid(link))
- return -EOPNOTSUPP;
-
- /* If SCR can be read, use it to determine the current SPD.
- * If not, use cached value in link->sata_spd.
- */
- rc = sata_scr_read(link, SCR_STATUS, &sstatus);
- if (rc == 0 && ata_sstatus_online(sstatus))
- spd = (sstatus >> 4) & 0xf;
- else
- spd = link->sata_spd;
-
- mask = link->sata_spd_limit;
- if (mask <= 1)
- return -EINVAL;
-
- /* unconditionally mask off the highest bit */
- bit = fls(mask) - 1;
- mask &= ~(1 << bit);
-
- /*
- * Mask off all speeds higher than or equal to the current one. At
- * this point, if current SPD is not available and we previously
- * recorded the link speed from SStatus, the driver has already
- * masked off the highest bit so mask should already be 1 or 0.
- * Otherwise, we should not force 1.5Gbps on a link where we have
- * not previously recorded speed from SStatus. Just return in this
- * case.
- */
- if (spd > 1)
- mask &= (1 << (spd - 1)) - 1;
- else if (link->sata_spd)
- return -EINVAL;
-
- /* were we already at the bottom? */
- if (!mask)
- return -EINVAL;
-
- if (spd_limit) {
- if (mask & ((1 << spd_limit) - 1))
- mask &= (1 << spd_limit) - 1;
- else {
- bit = ffs(mask) - 1;
- mask = 1 << bit;
- }
- }
-
- link->sata_spd_limit = mask;
-
- ata_link_warn(link, "limiting SATA link speed to %s\n",
- sata_spd_string(fls(mask)));
-
- return 0;
-}
-
#ifdef CONFIG_ATA_ACPI
/**
* ata_timing_cycle2mode - find xfer mode for the specified cycle duration
}
EXPORT_SYMBOL_GPL(sata_set_spd);
+/**
+ * sata_down_spd_limit - adjust SATA spd limit downward
+ * @link: Link to adjust SATA spd limit for
+ * @spd_limit: Additional limit
+ *
+ * Adjust SATA spd limit of @link downward. Note that this
+ * function only adjusts the limit. The change must be applied
+ * using sata_set_spd().
+ *
+ * If @spd_limit is non-zero, the speed is limited to equal to or
+ * lower than @spd_limit if such speed is supported. If
+ * @spd_limit is slower than any supported speed, only the lowest
+ * supported speed is allowed.
+ *
+ * LOCKING:
+ * Inherited from caller.
+ *
+ * RETURNS:
+ * 0 on success, negative errno on failure
+ */
+int sata_down_spd_limit(struct ata_link *link, u32 spd_limit)
+{
+ u32 sstatus, spd, mask;
+ int rc, bit;
+
+ if (!sata_scr_valid(link))
+ return -EOPNOTSUPP;
+
+ /* If SCR can be read, use it to determine the current SPD.
+ * If not, use cached value in link->sata_spd.
+ */
+ rc = sata_scr_read(link, SCR_STATUS, &sstatus);
+ if (rc == 0 && ata_sstatus_online(sstatus))
+ spd = (sstatus >> 4) & 0xf;
+ else
+ spd = link->sata_spd;
+
+ mask = link->sata_spd_limit;
+ if (mask <= 1)
+ return -EINVAL;
+
+ /* unconditionally mask off the highest bit */
+ bit = fls(mask) - 1;
+ mask &= ~(1 << bit);
+
+ /*
+ * Mask off all speeds higher than or equal to the current one. At
+ * this point, if current SPD is not available and we previously
+ * recorded the link speed from SStatus, the driver has already
+ * masked off the highest bit so mask should already be 1 or 0.
+ * Otherwise, we should not force 1.5Gbps on a link where we have
+ * not previously recorded speed from SStatus. Just return in this
+ * case.
+ */
+ if (spd > 1)
+ mask &= (1 << (spd - 1)) - 1;
+ else if (link->sata_spd)
+ return -EINVAL;
+
+ /* were we already at the bottom? */
+ if (!mask)
+ return -EINVAL;
+
+ if (spd_limit) {
+ if (mask & ((1 << spd_limit) - 1))
+ mask &= (1 << spd_limit) - 1;
+ else {
+ bit = ffs(mask) - 1;
+ mask = 1 << bit;
+ }
+ }
+
+ link->sata_spd_limit = mask;
+
+ ata_link_warn(link, "limiting SATA link speed to %s\n",
+ sata_spd_string(fls(mask)));
+
+ return 0;
+}
+
/**
* sata_link_hardreset - reset link via SATA phy reset
* @link: link to reset
extern int libata_allow_tpm;
extern const struct device_type ata_port_type;
extern struct ata_link *ata_dev_phys_link(struct ata_device *dev);
+
+static inline bool ata_sstatus_online(u32 sstatus)
+{
+ return (sstatus & 0xf) == 0x3;
+}
+
#ifdef CONFIG_ATA_FORCE
extern void ata_force_cbl(struct ata_port *ap);
#else
struct ata_taskfile *tf, bool set_active);
extern void ata_dev_power_set_standby(struct ata_device *dev);
extern void ata_dev_power_set_active(struct ata_device *dev);
-extern int sata_down_spd_limit(struct ata_link *link, u32 spd_limit);
extern int ata_down_xfermask_limit(struct ata_device *dev, unsigned int sel);
extern unsigned int ata_dev_set_feature(struct ata_device *dev,
u8 subcmd, u8 action);
#define to_ata_port(d) container_of(d, struct ata_port, tdev)
+/* libata-sata.c */
+#ifdef CONFIG_SATA_HOST
+int sata_down_spd_limit(struct ata_link *link, u32 spd_limit);
+#else
+static inline int sata_down_spd_limit(struct ata_link *link, u32 spd_limit)
+{
+ return -EOPNOTSUPP;
+}
+#endif
+
/* libata-acpi.c */
#ifdef CONFIG_ATA_ACPI
extern unsigned int ata_acpi_gtf_filter;
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