* move sata_link_hardreset() to libata-sata.c * add static inline for CONFIG_SATA_HOST=n case * make sata_set_spd_needed() static Code size savings on m68k arch using (modified) atari_defconfig: text data bss dec hex filename before: 32724 572 40 33336 8238 drivers/ata/libata-core.o after: 32559 572 40 33171 8193 drivers/ata/libata-core.o Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@xxxxxxxxxxx> --- drivers/ata/libata-core.c | 113 ------------------------------------- drivers/ata/libata-sata.c | 115 +++++++++++++++++++++++++++++++++++++- drivers/ata/libata.h | 7 --- include/linux/libata.h | 16 +++++- 4 files changed, 127 insertions(+), 124 deletions(-) diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c index 4ca81ef7c8bd..19624d056d92 100644 --- a/drivers/ata/libata-core.c +++ b/drivers/ata/libata-core.c @@ -3531,119 +3531,6 @@ 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. - * - * *@online 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-sata.c b/drivers/ata/libata-sata.c index 34852fced999..05a1872ba329 100644 --- a/drivers/ata/libata-sata.c +++ b/drivers/ata/libata-sata.c @@ -449,7 +449,7 @@ 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; @@ -490,6 +490,119 @@ int sata_set_spd(struct ata_link *link) } EXPORT_SYMBOL_GPL(sata_set_spd); +/** + * 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. + * + * *@online 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.h b/drivers/ata/libata.h index 53b45ebe3d55..cd8090ad43e5 100644 --- a/drivers/ata/libata.h +++ b/drivers/ata/libata.h @@ -87,13 +87,6 @@ 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 3981e413f582..bf13af0c47ae 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); @@ -1192,6 +1189,9 @@ 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); +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_link_resume(struct ata_link *link, const unsigned long *params, unsigned long deadline); #else @@ -1209,6 +1209,16 @@ 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; } +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; +} static inline int sata_link_resume(struct ata_link *link, const unsigned long *params, unsigned long deadline) -- 2.24.1