diff options
| -rw-r--r-- | drivers/ata/ahci.c | 35 | ||||
| -rw-r--r-- | drivers/ata/ata_piix.c | 2 | ||||
| -rw-r--r-- | drivers/ata/libata-core.c | 50 | ||||
| -rw-r--r-- | drivers/ata/libata-pmp.c | 7 | ||||
| -rw-r--r-- | drivers/ata/libata-sff.c | 49 | ||||
| -rw-r--r-- | include/linux/libata.h | 10 |
6 files changed, 92 insertions, 61 deletions
diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c index 7e251a2cbda5..0f553aaa6f79 100644 --- a/drivers/ata/ahci.c +++ b/drivers/ata/ahci.c @@ -1343,10 +1343,12 @@ static int ahci_softreset(struct ata_link *link, unsigned int *class, static int ahci_hardreset(struct ata_link *link, unsigned int *class, unsigned long deadline) { + const unsigned long *timing = sata_ehc_deb_timing(&link->eh_context); struct ata_port *ap = link->ap; struct ahci_port_priv *pp = ap->private_data; u8 *d2h_fis = pp->rx_fis + RX_FIS_D2H_REG; struct ata_taskfile tf; + bool online; int rc; DPRINTK("ENTER\n"); @@ -1358,14 +1360,14 @@ static int ahci_hardreset(struct ata_link *link, unsigned int *class, tf.command = 0x80; ata_tf_to_fis(&tf, 0, 0, d2h_fis); - rc = sata_sff_hardreset(link, class, deadline); + rc = sata_link_hardreset(link, timing, deadline, &online, + ahci_check_ready); ahci_start_engine(ap); - if (rc == 0 && ata_link_online(link)) + *class = ATA_DEV_NONE; + if (online) *class = ahci_dev_classify(ap); - if (rc != -EAGAIN && *class == ATA_DEV_UNKNOWN) - *class = ATA_DEV_NONE; DPRINTK("EXIT, rc=%d, class=%u\n", rc, *class); return rc; @@ -1376,6 +1378,7 @@ static int ahci_vt8251_hardreset(struct ata_link *link, unsigned int *class, { struct ata_port *ap = link->ap; u32 serror; + bool online; int rc; DPRINTK("ENTER\n"); @@ -1383,7 +1386,7 @@ static int ahci_vt8251_hardreset(struct ata_link *link, unsigned int *class, ahci_stop_engine(ap); rc = sata_link_hardreset(link, sata_ehc_deb_timing(&link->eh_context), - deadline); + deadline, &online, NULL); /* vt8251 needs SError cleared for the port to operate */ ahci_scr_read(ap, SCR_ERROR, &serror); @@ -1396,7 +1399,8 @@ static int ahci_vt8251_hardreset(struct ata_link *link, unsigned int *class, /* vt8251 doesn't clear BSY on signature FIS reception, * request follow-up softreset. */ - return rc ?: -EAGAIN; + *class = ATA_DEV_NONE; + return online ? -EAGAIN : rc; } static int ahci_p5wdh_hardreset(struct ata_link *link, unsigned int *class, @@ -1406,6 +1410,7 @@ static int ahci_p5wdh_hardreset(struct ata_link *link, unsigned int *class, struct ahci_port_priv *pp = ap->private_data; u8 *d2h_fis = pp->rx_fis + RX_FIS_D2H_REG; struct ata_taskfile tf; + bool online; int rc; ahci_stop_engine(ap); @@ -1416,13 +1421,10 @@ static int ahci_p5wdh_hardreset(struct ata_link *link, unsigned int *class, ata_tf_to_fis(&tf, 0, 0, d2h_fis); rc = sata_link_hardreset(link, sata_ehc_deb_timing(&link->eh_context), - deadline); + deadline, &online, NULL); ahci_start_engine(ap); - if (rc || ata_link_offline(link)) - return rc; - /* The pseudo configuration device on SIMG4726 attached to * ASUS P5W-DH Deluxe doesn't send signature FIS after * hardreset if no device is attached to the first downstream @@ -1436,11 +1438,14 @@ static int ahci_p5wdh_hardreset(struct ata_link *link, unsigned int *class, * have to be reset again. For most cases, this should * suffice while making probing snappish enough. */ - rc = ata_wait_after_reset(link, jiffies + 2 * HZ, ahci_check_ready); - if (rc) - ahci_kick_engine(ap, 0); - - return 0; + if (online) { + rc = ata_wait_after_reset(link, jiffies + 2 * HZ, + ahci_check_ready); + if (rc) + ahci_kick_engine(ap, 0); + } + *class = ATA_DEV_NONE; + return rc; } static void ahci_postreset(struct ata_link *link, unsigned int *class) diff --git a/drivers/ata/ata_piix.c b/drivers/ata/ata_piix.c index 7ab76a413cdf..f59a55bfade4 100644 --- a/drivers/ata/ata_piix.c +++ b/drivers/ata/ata_piix.c @@ -1022,7 +1022,7 @@ static int piix_sidpr_hardreset(struct ata_link *link, unsigned int *class, int rc; /* do hardreset */ - rc = sata_link_hardreset(link, timing, deadline); + rc = sata_link_hardreset(link, timing, deadline, NULL, NULL); if (rc) { ata_link_printk(link, KERN_ERR, "COMRESET failed (errno=%d)\n", rc); diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c index 3bad6f189190..b607292b6480 100644 --- a/drivers/ata/libata-core.c +++ b/drivers/ata/libata-core.c @@ -3557,8 +3557,18 @@ int ata_std_prereset(struct ata_link *link, unsigned long deadline) * @link: link to reset * @timing: timing parameters { interval, duratinon, 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) @@ -3567,13 +3577,17 @@ int ata_std_prereset(struct ata_link *link, unsigned long deadline) * 0 on success, -errno otherwise. */ int sata_link_hardreset(struct ata_link *link, const unsigned long *timing, - unsigned long deadline) + 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 @@ -3607,7 +3621,41 @@ int sata_link_hardreset(struct ata_link *link, const unsigned long *timing, /* bring link back */ rc = sata_link_resume(link, timing, deadline); + if (rc) + goto out; + /* if link is offline nothing more to do */ + if (ata_link_offline(link)) + goto out; + + /* Link is online. From this point, -ENODEV too is an error. */ + if (online) + *online = true; + + if ((link->ap->flags & ATA_FLAG_PMP) && 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 = 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) + ata_link_printk(link, KERN_ERR, + "COMRESET failed (errno=%d)\n", rc); DPRINTK("EXIT, rc=%d\n", rc); return rc; } diff --git a/drivers/ata/libata-pmp.c b/drivers/ata/libata-pmp.c index a7cb1498c9b2..7f1a87f01ab2 100644 --- a/drivers/ata/libata-pmp.c +++ b/drivers/ata/libata-pmp.c @@ -239,13 +239,14 @@ int sata_pmp_std_hardreset(struct ata_link *link, unsigned int *class, unsigned long deadline) { const unsigned long *timing = sata_ehc_deb_timing(&link->eh_context); + bool online; u32 tmp; int rc; DPRINTK("ENTER\n"); /* do hardreset */ - rc = sata_link_hardreset(link, timing, deadline); + rc = sata_link_hardreset(link, timing, deadline, &online, NULL); if (rc) { ata_link_printk(link, KERN_ERR, "COMRESET failed (errno=%d)\n", rc); @@ -261,7 +262,7 @@ int sata_pmp_std_hardreset(struct ata_link *link, unsigned int *class, } /* if device is present, follow up with srst to wait for !BSY */ - if (ata_link_online(link)) + if (online) rc = -EAGAIN; out: /* if SCR isn't accessible, we need to reset the PMP */ @@ -916,7 +917,7 @@ static int sata_pmp_eh_handle_disabled_links(struct ata_port *ap) * SError.N working. */ sata_link_hardreset(link, sata_deb_timing_normal, - jiffies + ATA_TMOUT_INTERNAL_QUICK); + jiffies + ATA_TMOUT_INTERNAL_QUICK, NULL, NULL); /* unconditionally clear SError.N */ rc = sata_scr_write(link, SCR_ERROR, SERR_PHYRDY_CHG); diff --git a/drivers/ata/libata-sff.c b/drivers/ata/libata-sff.c index 78912c5011ad..0b97e84d3af6 100644 --- a/drivers/ata/libata-sff.c +++ b/drivers/ata/libata-sff.c @@ -1921,50 +1921,19 @@ int ata_sff_softreset(struct ata_link *link, unsigned int *classes, int sata_sff_hardreset(struct ata_link *link, unsigned int *class, unsigned long deadline) { - struct ata_port *ap = link->ap; - const unsigned long *timing = sata_ehc_deb_timing(&link->eh_context); + struct ata_eh_context *ehc = &link->eh_context; + const unsigned long *timing = sata_ehc_deb_timing(ehc); + bool online; int rc; - DPRINTK("ENTER\n"); - - /* do hardreset */ - rc = sata_link_hardreset(link, timing, deadline); - if (rc) { - ata_link_printk(link, KERN_ERR, - "COMRESET failed (errno=%d)\n", rc); - return rc; - } - - /* TODO: phy layer with polling, timeouts, etc. */ - if (ata_link_offline(link)) { - *class = ATA_DEV_NONE; - DPRINTK("EXIT, link offline\n"); - return 0; - } - - /* If PMP is supported, we have to do follow-up SRST. Note - * that some PMPs don't send D2H Reg FIS after hardreset at - * all if the first port is empty. Wait for it just for a - * second and request follow-up SRST. - */ - if (ap->flags & ATA_FLAG_PMP) { - ata_sff_wait_after_reset(link, 1, jiffies + HZ); - return -EAGAIN; - } - - /* wait for the link to become online */ - rc = ata_sff_wait_after_reset(link, 1, deadline); - /* link occupied, -ENODEV too is an error */ - if (rc) { - ata_link_printk(link, KERN_ERR, - "COMRESET failed (errno=%d)\n", rc); - return rc; - } - - *class = ata_sff_dev_classify(link->device, 1, NULL); + rc = sata_link_hardreset(link, timing, deadline, &online, + ata_sff_check_ready); + *class = ATA_DEV_NONE; + if (online) + *class = ata_sff_dev_classify(link->device, 1, NULL); DPRINTK("EXIT, class=%u\n", *class); - return 0; + return rc; } /** diff --git a/include/linux/libata.h b/include/linux/libata.h index 4bbf2524e473..d9ebce2bf5e7 100644 --- a/include/linux/libata.h +++ b/include/linux/libata.h @@ -261,6 +261,13 @@ enum { */ ATA_WAIT_AFTER_RESET_MSECS = 150, + /* If PMP is supported, we have to do follow-up SRST. As some + * PMPs don't send D2H Reg FIS after hardreset, LLDs are + * advised to wait only for the following duration before + * doing SRST. + */ + ATA_TMOUT_PMP_SRST_WAIT = 1 * HZ, + /* ATA bus states */ BUS_UNKNOWN = 0, BUS_DMA = 1, @@ -844,7 +851,8 @@ extern int sata_link_debounce(struct ata_link *link, extern int sata_link_resume(struct ata_link *link, const unsigned long *params, unsigned long deadline); extern int sata_link_hardreset(struct ata_link *link, - const unsigned long *timing, unsigned long deadline); + const unsigned long *timing, unsigned long deadline, + bool *online, int (*check_ready)(struct ata_link *)); extern void ata_std_postreset(struct ata_link *link, unsigned int *classes); extern void ata_port_disable(struct ata_port *); |