diff options
author | Damien Le Moal <dlemoal@kernel.org> | 2024-07-17 17:39:29 +0900 |
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committer | Damien Le Moal <dlemoal@kernel.org> | 2024-09-07 10:16:55 +0900 |
commit | b642212d8858059f652b2a81b0cb73541416d2e3 (patch) | |
tree | 7a8f549e74289bc6ed3ec3ed696268eb50374630 /drivers/ata/libata-core.c | |
parent | 5bb52d926598a018b1510fd6684dcbaed31d57f2 (diff) |
ata: libata: Move sata_down_spd_limit() to libata-sata.c
Move the definition of the function sata_down_spd_limit() to
libata-sata.c where it belongs, together with sata_set_spd().
The helper function ata_sstatus_online() is also changed to be an
inline function defined in drivers/ata/libata.h.
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Niklas Cassel <cassel@kernel.org>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Diffstat (limited to 'drivers/ata/libata-core.c')
-rw-r--r-- | drivers/ata/libata-core.c | 85 |
1 files changed, 0 insertions, 85 deletions
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c index 5acc37397f4b..b957eb900a00 100644 --- a/drivers/ata/libata-core.c +++ b/drivers/ata/libata-core.c @@ -167,11 +167,6 @@ static inline bool ata_dev_print_info(const struct ata_device *dev) 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 @@ -3200,86 +3195,6 @@ struct ata_device *ata_dev_pair(struct ata_device *adev) } 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 |