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Message-Id: <20200128133343.29905-20-b.zolnierkie@samsung.com>
Date: Tue, 28 Jan 2020 14:33:34 +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>,
linux-ide@...r.kernel.org, linux-kernel@...r.kernel.org,
b.zolnierkie@...sung.com
Subject: [PATCH 19/28] ata: move sata_link_hardreset() to libata-core-sata.c
* move sata_link_hardreset() to libata-core-sata.c
* add static inline for CONFIG_SATA_HOST=n case
* make sata_set_spd_needed() static
Code size savings on m68k arch using atari_defconfig:
text data bss dec hex filename
before:
33909 572 40 34521 86d9 drivers/ata/libata-core.o
after:
33574 572 40 34186 858a drivers/ata/libata-core.o
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
---
drivers/ata/libata-core-sata.c | 115 ++++++++++++++++++++++++++++++++-
drivers/ata/libata-core.c | 113 --------------------------------
drivers/ata/libata.h | 2 -
include/linux/libata.h | 16 ++++-
4 files changed, 127 insertions(+), 119 deletions(-)
diff --git a/drivers/ata/libata-core-sata.c b/drivers/ata/libata-core-sata.c
index 73f8be386a44..b43207396829 100644
--- a/drivers/ata/libata-core-sata.c
+++ b/drivers/ata/libata-core-sata.c
@@ -405,7 +405,7 @@ static int __sata_set_spd_needed(struct ata_link *link, u32 *scontrol)
* RETURNS:
* 1 if SATA spd configuration is needed, 0 otherwise.
*/
-int sata_set_spd_needed(struct ata_link *link)
+static int sata_set_spd_needed(struct ata_link *link)
{
u32 scontrol;
@@ -659,6 +659,119 @@ int sata_link_scr_lpm(struct ata_link *link, enum ata_lpm_policy policy,
}
EXPORT_SYMBOL_GPL(sata_link_scr_lpm);
+/**
+ * sata_link_hardreset - reset link via SATA phy reset
+ * @link: link to reset
+ * @timing: timing parameters { interval, duration, timeout } in msec
+ * @deadline: deadline jiffies for the operation
+ * @online: optional out parameter indicating link onlineness
+ * @check_ready: optional callback to check link readiness
+ *
+ * SATA phy-reset @link using DET bits of SControl register.
+ * After hardreset, link readiness is waited upon using
+ * ata_wait_ready() if @check_ready is specified. LLDs are
+ * allowed to not specify @check_ready and wait itself after this
+ * function returns. Device classification is LLD's
+ * responsibility.
+ *
+ * *@...ine is set to one iff reset succeeded and @link is online
+ * after reset.
+ *
+ * LOCKING:
+ * Kernel thread context (may sleep)
+ *
+ * RETURNS:
+ * 0 on success, -errno otherwise.
+ */
+int sata_link_hardreset(struct ata_link *link, const unsigned long *timing,
+ unsigned long deadline,
+ bool *online, int (*check_ready)(struct ata_link *))
+{
+ u32 scontrol;
+ int rc;
+
+ DPRINTK("ENTER\n");
+
+ if (online)
+ *online = false;
+
+ if (sata_set_spd_needed(link)) {
+ /* SATA spec says nothing about how to reconfigure
+ * spd. To be on the safe side, turn off phy during
+ * reconfiguration. This works for at least ICH7 AHCI
+ * and Sil3124.
+ */
+ if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
+ goto out;
+
+ scontrol = (scontrol & 0x0f0) | 0x304;
+
+ if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol)))
+ goto out;
+
+ sata_set_spd(link);
+ }
+
+ /* issue phy wake/reset */
+ if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
+ goto out;
+
+ scontrol = (scontrol & 0x0f0) | 0x301;
+
+ if ((rc = sata_scr_write_flush(link, SCR_CONTROL, scontrol)))
+ goto out;
+
+ /* Couldn't find anything in SATA I/II specs, but AHCI-1.1
+ * 10.4.2 says at least 1 ms.
+ */
+ ata_msleep(link->ap, 1);
+
+ /* bring link back */
+ rc = sata_link_resume(link, timing, deadline);
+ if (rc)
+ goto out;
+ /* if link is offline nothing more to do */
+ if (ata_phys_link_offline(link))
+ goto out;
+
+ /* Link is online. From this point, -ENODEV too is an error. */
+ if (online)
+ *online = true;
+
+ if (sata_pmp_supported(link->ap) && ata_is_host_link(link)) {
+ /* If PMP is supported, we have to do follow-up SRST.
+ * Some PMPs don't send D2H Reg FIS after hardreset if
+ * the first port is empty. Wait only for
+ * ATA_TMOUT_PMP_SRST_WAIT.
+ */
+ if (check_ready) {
+ unsigned long pmp_deadline;
+
+ pmp_deadline = ata_deadline(jiffies,
+ ATA_TMOUT_PMP_SRST_WAIT);
+ if (time_after(pmp_deadline, deadline))
+ pmp_deadline = deadline;
+ ata_wait_ready(link, pmp_deadline, check_ready);
+ }
+ rc = -EAGAIN;
+ goto out;
+ }
+
+ rc = 0;
+ if (check_ready)
+ rc = ata_wait_ready(link, deadline, check_ready);
+ out:
+ if (rc && rc != -EAGAIN) {
+ /* online is set iff link is online && reset succeeded */
+ if (online)
+ *online = false;
+ ata_link_err(link, "COMRESET failed (errno=%d)\n", rc);
+ }
+ DPRINTK("EXIT, rc=%d\n", rc);
+ return rc;
+}
+EXPORT_SYMBOL_GPL(sata_link_hardreset);
+
/**
* ata_slave_link_init - initialize slave link
* @ap: port to initialize slave link for
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index d3587fb1e78c..bd82cab2996e 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -3236,119 +3236,6 @@ int ata_std_prereset(struct ata_link *link, unsigned long deadline)
}
EXPORT_SYMBOL_GPL(ata_std_prereset);
-/**
- * sata_link_hardreset - reset link via SATA phy reset
- * @link: link to reset
- * @timing: timing parameters { interval, duration, timeout } in msec
- * @deadline: deadline jiffies for the operation
- * @online: optional out parameter indicating link onlineness
- * @check_ready: optional callback to check link readiness
- *
- * SATA phy-reset @link using DET bits of SControl register.
- * After hardreset, link readiness is waited upon using
- * ata_wait_ready() if @check_ready is specified. LLDs are
- * allowed to not specify @check_ready and wait itself after this
- * function returns. Device classification is LLD's
- * responsibility.
- *
- * *@...ine is set to one iff reset succeeded and @link is online
- * after reset.
- *
- * LOCKING:
- * Kernel thread context (may sleep)
- *
- * RETURNS:
- * 0 on success, -errno otherwise.
- */
-int sata_link_hardreset(struct ata_link *link, const unsigned long *timing,
- unsigned long deadline,
- bool *online, int (*check_ready)(struct ata_link *))
-{
- u32 scontrol;
- int rc;
-
- DPRINTK("ENTER\n");
-
- if (online)
- *online = false;
-
- if (sata_set_spd_needed(link)) {
- /* SATA spec says nothing about how to reconfigure
- * spd. To be on the safe side, turn off phy during
- * reconfiguration. This works for at least ICH7 AHCI
- * and Sil3124.
- */
- if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
- goto out;
-
- scontrol = (scontrol & 0x0f0) | 0x304;
-
- if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol)))
- goto out;
-
- sata_set_spd(link);
- }
-
- /* issue phy wake/reset */
- if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
- goto out;
-
- scontrol = (scontrol & 0x0f0) | 0x301;
-
- if ((rc = sata_scr_write_flush(link, SCR_CONTROL, scontrol)))
- goto out;
-
- /* Couldn't find anything in SATA I/II specs, but AHCI-1.1
- * 10.4.2 says at least 1 ms.
- */
- ata_msleep(link->ap, 1);
-
- /* bring link back */
- rc = sata_link_resume(link, timing, deadline);
- if (rc)
- goto out;
- /* if link is offline nothing more to do */
- if (ata_phys_link_offline(link))
- goto out;
-
- /* Link is online. From this point, -ENODEV too is an error. */
- if (online)
- *online = true;
-
- if (sata_pmp_supported(link->ap) && ata_is_host_link(link)) {
- /* If PMP is supported, we have to do follow-up SRST.
- * Some PMPs don't send D2H Reg FIS after hardreset if
- * the first port is empty. Wait only for
- * ATA_TMOUT_PMP_SRST_WAIT.
- */
- if (check_ready) {
- unsigned long pmp_deadline;
-
- pmp_deadline = ata_deadline(jiffies,
- ATA_TMOUT_PMP_SRST_WAIT);
- if (time_after(pmp_deadline, deadline))
- pmp_deadline = deadline;
- ata_wait_ready(link, pmp_deadline, check_ready);
- }
- rc = -EAGAIN;
- goto out;
- }
-
- rc = 0;
- if (check_ready)
- rc = ata_wait_ready(link, deadline, check_ready);
- out:
- if (rc && rc != -EAGAIN) {
- /* online is set iff link is online && reset succeeded */
- if (online)
- *online = false;
- ata_link_err(link, "COMRESET failed (errno=%d)\n", rc);
- }
- DPRINTK("EXIT, rc=%d\n", rc);
- return rc;
-}
-EXPORT_SYMBOL_GPL(sata_link_hardreset);
-
/**
* sata_std_hardreset - COMRESET w/o waiting or classification
* @link: link to reset
diff --git a/drivers/ata/libata.h b/drivers/ata/libata.h
index ea614ac10c76..518a8e08a26d 100644
--- a/drivers/ata/libata.h
+++ b/drivers/ata/libata.h
@@ -108,7 +108,6 @@ int ata_do_link_spd_horkage(struct ata_device *dev);
int ata_dev_config_ncq(struct ata_device *dev, char *desc, size_t desc_sz);
void sata_print_link_status(struct ata_link *link);
int sata_down_spd_limit(struct ata_link *link, u32 spd_limit);
-int sata_set_spd_needed(struct ata_link *link);
#else
static inline int ata_do_link_spd_horkage(struct ata_device *dev) { return 0; }
static inline int ata_dev_config_ncq(struct ata_device *dev, char *desc,
@@ -122,7 +121,6 @@ static inline int sata_down_spd_limit(struct ata_link *link, u32 spd_limit)
{
return -EOPNOTSUPP;
}
-static inline int sata_set_spd_needed(struct ata_link *link) { return 1; }
#endif
/* libata-acpi.c */
diff --git a/include/linux/libata.h b/include/linux/libata.h
index 8a11ae3a019f..453322cdf64a 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -1079,9 +1079,6 @@ static inline int ata_port_is_dummy(struct ata_port *ap)
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));
-extern int sata_link_hardreset(struct ata_link *link,
- const unsigned long *timing, unsigned long deadline,
- bool *online, int (*check_ready)(struct ata_link *));
extern int sata_std_hardreset(struct ata_link *link, unsigned int *class,
unsigned long deadline);
extern void ata_std_postreset(struct ata_link *link, unsigned int *classes);
@@ -1198,6 +1195,9 @@ extern int sata_link_resume(struct ata_link *link, const unsigned long *params,
unsigned long deadline);
extern int sata_link_scr_lpm(struct ata_link *link, enum ata_lpm_policy policy,
bool spm_wakeup);
+extern int sata_link_hardreset(struct ata_link *link,
+ const unsigned long *timing, unsigned long deadline,
+ bool *online, int (*check_ready)(struct ata_link *));
extern int ata_slave_link_init(struct ata_port *ap);
extern void ata_tf_to_fis(const struct ata_taskfile *tf,
u8 pmp, int is_cmd, u8 *fis);
@@ -1211,6 +1211,16 @@ static inline int sata_link_resume(struct ata_link *link,
{
return -EOPNOTSUPP;
}
+static inline int sata_link_hardreset(struct ata_link *link,
+ const unsigned long *timing,
+ unsigned long deadline,
+ bool *online,
+ int (*check_ready)(struct ata_link *))
+{
+ if (online)
+ *online = false;
+ return -EOPNOTSUPP;
+}
#endif
extern int ata_cable_40wire(struct ata_port *ap);
--
2.24.1
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