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Date: Thu, 26 Mar 2020 16:58:13 +0100
From: Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
To: Jens Axboe <axboe@...nel.dk>
Cc: Michael Schmitz <schmitzmic@...il.com>,
Geert Uytterhoeven <geert@...ux-m68k.org>,
Christoph Hellwig <hch@....de>, linux-ide@...r.kernel.org,
linux-m68k@...ts.linux-m68k.org, linux-kernel@...r.kernel.org,
b.zolnierkie@...sung.com
Subject: [PATCH v5 18/27] ata: move *sata_set_spd*() to libata-sata.c
* move *sata_set_spd*() to libata-sata.c
* add static inlines for CONFIG_SATA_HOST=n case
Code size savings on m68k arch using (modified) atari_defconfig:
text data bss dec hex filename
before:
32842 572 40 33458 82ae drivers/ata/libata-core.o
after:
32812 572 40 33428 8290 drivers/ata/libata-core.o
Reviewed-by: Christoph Hellwig <hch@....de>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
---
drivers/ata/libata-core.c | 81 ---------------------------------------
drivers/ata/libata-sata.c | 81 +++++++++++++++++++++++++++++++++++++++
drivers/ata/libata.h | 7 ++++
include/linux/libata.h | 3 +-
4 files changed, 90 insertions(+), 82 deletions(-)
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index ba1e5c4d3c09..13214ebd0e5c 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -3050,87 +3050,6 @@ int sata_down_spd_limit(struct ata_link *link, u32 spd_limit)
return 0;
}
-static int __sata_set_spd_needed(struct ata_link *link, u32 *scontrol)
-{
- struct ata_link *host_link = &link->ap->link;
- u32 limit, target, spd;
-
- limit = link->sata_spd_limit;
-
- /* Don't configure downstream link faster than upstream link.
- * It doesn't speed up anything and some PMPs choke on such
- * configuration.
- */
- if (!ata_is_host_link(link) && host_link->sata_spd)
- limit &= (1 << host_link->sata_spd) - 1;
-
- if (limit == UINT_MAX)
- target = 0;
- else
- target = fls(limit);
-
- spd = (*scontrol >> 4) & 0xf;
- *scontrol = (*scontrol & ~0xf0) | ((target & 0xf) << 4);
-
- return spd != target;
-}
-
-/**
- * sata_set_spd_needed - is SATA spd configuration needed
- * @link: Link in question
- *
- * Test whether the spd limit in SControl matches
- * @link->sata_spd_limit. This function is used to determine
- * whether hardreset is necessary to apply SATA spd
- * configuration.
- *
- * LOCKING:
- * Inherited from caller.
- *
- * RETURNS:
- * 1 if SATA spd configuration is needed, 0 otherwise.
- */
-static int sata_set_spd_needed(struct ata_link *link)
-{
- u32 scontrol;
-
- if (sata_scr_read(link, SCR_CONTROL, &scontrol))
- return 1;
-
- return __sata_set_spd_needed(link, &scontrol);
-}
-
-/**
- * sata_set_spd - set SATA spd according to spd limit
- * @link: Link to set SATA spd for
- *
- * Set SATA spd of @link according to sata_spd_limit.
- *
- * LOCKING:
- * Inherited from caller.
- *
- * RETURNS:
- * 0 if spd doesn't need to be changed, 1 if spd has been
- * changed. Negative errno if SCR registers are inaccessible.
- */
-int sata_set_spd(struct ata_link *link)
-{
- u32 scontrol;
- int rc;
-
- if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
- return rc;
-
- if (!__sata_set_spd_needed(link, &scontrol))
- return 0;
-
- if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol)))
- return rc;
-
- return 1;
-}
-EXPORT_SYMBOL_GPL(sata_set_spd);
-
#ifdef CONFIG_ATA_ACPI
/**
* ata_timing_cycle2mode - find xfer mode for the specified cycle duration
diff --git a/drivers/ata/libata-sata.c b/drivers/ata/libata-sata.c
index 1ef4c19864ac..d66afdc33d54 100644
--- a/drivers/ata/libata-sata.c
+++ b/drivers/ata/libata-sata.c
@@ -271,6 +271,87 @@ int sata_link_scr_lpm(struct ata_link *link, enum ata_lpm_policy policy,
}
EXPORT_SYMBOL_GPL(sata_link_scr_lpm);
+static int __sata_set_spd_needed(struct ata_link *link, u32 *scontrol)
+{
+ struct ata_link *host_link = &link->ap->link;
+ u32 limit, target, spd;
+
+ limit = link->sata_spd_limit;
+
+ /* Don't configure downstream link faster than upstream link.
+ * It doesn't speed up anything and some PMPs choke on such
+ * configuration.
+ */
+ if (!ata_is_host_link(link) && host_link->sata_spd)
+ limit &= (1 << host_link->sata_spd) - 1;
+
+ if (limit == UINT_MAX)
+ target = 0;
+ else
+ target = fls(limit);
+
+ spd = (*scontrol >> 4) & 0xf;
+ *scontrol = (*scontrol & ~0xf0) | ((target & 0xf) << 4);
+
+ return spd != target;
+}
+
+/**
+ * sata_set_spd_needed - is SATA spd configuration needed
+ * @link: Link in question
+ *
+ * Test whether the spd limit in SControl matches
+ * @link->sata_spd_limit. This function is used to determine
+ * whether hardreset is necessary to apply SATA spd
+ * configuration.
+ *
+ * LOCKING:
+ * Inherited from caller.
+ *
+ * RETURNS:
+ * 1 if SATA spd configuration is needed, 0 otherwise.
+ */
+int sata_set_spd_needed(struct ata_link *link)
+{
+ u32 scontrol;
+
+ if (sata_scr_read(link, SCR_CONTROL, &scontrol))
+ return 1;
+
+ return __sata_set_spd_needed(link, &scontrol);
+}
+
+/**
+ * sata_set_spd - set SATA spd according to spd limit
+ * @link: Link to set SATA spd for
+ *
+ * Set SATA spd of @link according to sata_spd_limit.
+ *
+ * LOCKING:
+ * Inherited from caller.
+ *
+ * RETURNS:
+ * 0 if spd doesn't need to be changed, 1 if spd has been
+ * changed. Negative errno if SCR registers are inaccessible.
+ */
+int sata_set_spd(struct ata_link *link)
+{
+ u32 scontrol;
+ int rc;
+
+ if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
+ return rc;
+
+ if (!__sata_set_spd_needed(link, &scontrol))
+ return 0;
+
+ if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol)))
+ return rc;
+
+ return 1;
+}
+EXPORT_SYMBOL_GPL(sata_set_spd);
+
/**
* ata_slave_link_init - initialize slave link
* @ap: port to initialize slave link for
diff --git a/drivers/ata/libata.h b/drivers/ata/libata.h
index cd8090ad43e5..53b45ebe3d55 100644
--- a/drivers/ata/libata.h
+++ b/drivers/ata/libata.h
@@ -87,6 +87,13 @@ extern unsigned int ata_read_log_page(struct ata_device *dev, u8 log,
#define to_ata_port(d) container_of(d, struct ata_port, tdev)
+/* libata-sata.c */
+#ifdef CONFIG_SATA_HOST
+int sata_set_spd_needed(struct ata_link *link);
+#else
+static inline int sata_set_spd_needed(struct ata_link *link) { return 1; }
+#endif
+
/* libata-acpi.c */
#ifdef CONFIG_ATA_ACPI
extern unsigned int ata_acpi_gtf_filter;
diff --git a/include/linux/libata.h b/include/linux/libata.h
index 86703ce5a33e..f0817a8f1e3f 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -1074,7 +1074,6 @@ static inline int ata_port_is_dummy(struct ata_port *ap)
return ap->ops == &ata_dummy_port_ops;
}
-extern int sata_set_spd(struct ata_link *link);
extern int ata_std_prereset(struct ata_link *link, unsigned long deadline);
extern int ata_wait_after_reset(struct ata_link *link, unsigned long deadline,
int (*check_ready)(struct ata_link *link));
@@ -1194,6 +1193,7 @@ extern int sata_scr_valid(struct ata_link *link);
extern int sata_scr_read(struct ata_link *link, int reg, u32 *val);
extern int sata_scr_write(struct ata_link *link, int reg, u32 val);
extern int sata_scr_write_flush(struct ata_link *link, int reg, u32 val);
+extern int sata_set_spd(struct ata_link *link);
#else
static inline int sata_scr_valid(struct ata_link *link) { return 0; }
static inline int sata_scr_read(struct ata_link *link, int reg, u32 *val)
@@ -1208,6 +1208,7 @@ static inline int sata_scr_write_flush(struct ata_link *link, int reg, u32 val)
{
return -EOPNOTSUPP;
}
+static inline int sata_set_spd(struct ata_link *link) { return -EOPNOTSUPP; }
#endif
extern int sata_link_scr_lpm(struct ata_link *link, enum ata_lpm_policy policy,
bool spm_wakeup);
--
2.24.1
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