From c93b263e0d4fa8ce5fec0142a98196d1a127e845 Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Wed, 1 Sep 2010 17:50:04 +0200 Subject: libata: clean up lpm related symbols and sysfs show/store functions Link power management related symbols are in confusing state w/ mixed usages of lpm, ipm and pm. This patch cleans up lpm related symbols and sysfs show/store functions as follows. * lpm states - NOT_AVAILABLE, MIN_POWER, MAX_PERFORMANCE and MEDIUM_POWER are renamed to ATA_LPM_UNKNOWN and ATA_LPM_{MIN|MAX|MED}_POWER. * Pre/postfixes are unified to lpm. * sysfs show/store functions for link_power_management_policy were curiously named get/put and unnecessarily complex. Renamed to show/store and simplified. Signed-off-by: Tejun Heo Signed-off-by: Jeff Garzik --- drivers/ata/ahci.c | 2 +- drivers/ata/ahci.h | 2 +- drivers/ata/ahci_platform.c | 2 +- drivers/ata/libahci.c | 20 +++++++------- drivers/ata/libata-core.c | 50 +++++++++++++++++----------------- drivers/ata/libata-eh.c | 2 +- drivers/ata/libata-scsi.c | 66 +++++++++++++++------------------------------ drivers/ata/libata.h | 6 +++-- 8 files changed, 64 insertions(+), 86 deletions(-) (limited to 'drivers') diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c index 99d0e5a5114..68f7b421650 100644 --- a/drivers/ata/ahci.c +++ b/drivers/ata/ahci.c @@ -1209,7 +1209,7 @@ static int ahci_init_one(struct pci_dev *pdev, const struct pci_device_id *ent) 0x100 + ap->port_no * 0x80, "port"); /* set initial link pm policy */ - ap->pm_policy = NOT_AVAILABLE; + ap->lpm_policy = ATA_LPM_UNKNOWN; /* set enclosure management message type */ if (ap->flags & ATA_FLAG_EM) diff --git a/drivers/ata/ahci.h b/drivers/ata/ahci.h index e5fdeebf9ef..93867d3f8dd 100644 --- a/drivers/ata/ahci.h +++ b/drivers/ata/ahci.h @@ -216,7 +216,7 @@ enum { AHCI_FLAG_COMMON = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY | ATA_FLAG_MMIO | ATA_FLAG_PIO_DMA | ATA_FLAG_ACPI_SATA | ATA_FLAG_AN | - ATA_FLAG_IPM, + ATA_FLAG_LPM, ICH_MAP = 0x90, /* ICH MAP register */ diff --git a/drivers/ata/ahci_platform.c b/drivers/ata/ahci_platform.c index 84b643270e7..07556853c0d 100644 --- a/drivers/ata/ahci_platform.c +++ b/drivers/ata/ahci_platform.c @@ -130,7 +130,7 @@ static int __init ahci_probe(struct platform_device *pdev) ata_port_desc(ap, "port 0x%x", 0x100 + ap->port_no * 0x80); /* set initial link pm policy */ - ap->pm_policy = NOT_AVAILABLE; + ap->lpm_policy = ATA_LPM_UNKNOWN; /* set enclosure management message type */ if (ap->flags & ATA_FLAG_EM) diff --git a/drivers/ata/libahci.c b/drivers/ata/libahci.c index 8eea309ea21..ed7803f2b4f 100644 --- a/drivers/ata/libahci.c +++ b/drivers/ata/libahci.c @@ -56,8 +56,7 @@ MODULE_PARM_DESC(skip_host_reset, "skip global host reset (0=don't skip, 1=skip) module_param_named(ignore_sss, ahci_ignore_sss, int, 0444); MODULE_PARM_DESC(ignore_sss, "Ignore staggered spinup flag (0=don't ignore, 1=ignore)"); -static int ahci_enable_alpm(struct ata_port *ap, - enum link_pm policy); +static int ahci_enable_alpm(struct ata_port *ap, enum ata_lpm_policy policy); static void ahci_disable_alpm(struct ata_port *ap); static ssize_t ahci_led_show(struct ata_port *ap, char *buf); static ssize_t ahci_led_store(struct ata_port *ap, const char *buf, @@ -649,7 +648,7 @@ static void ahci_disable_alpm(struct ata_port *ap) u32 cmd; struct ahci_port_priv *pp = ap->private_data; - /* IPM bits should be disabled by libata-core */ + /* LPM bits should be disabled by libata-core */ /* get the existing command bits */ cmd = readl(port_mmio + PORT_CMD); @@ -691,8 +690,7 @@ static void ahci_disable_alpm(struct ata_port *ap) */ } -static int ahci_enable_alpm(struct ata_port *ap, - enum link_pm policy) +static int ahci_enable_alpm(struct ata_port *ap, enum ata_lpm_policy policy) { struct ahci_host_priv *hpriv = ap->host->private_data; void __iomem *port_mmio = ahci_port_base(ap); @@ -705,21 +703,21 @@ static int ahci_enable_alpm(struct ata_port *ap, return -EINVAL; switch (policy) { - case MAX_PERFORMANCE: - case NOT_AVAILABLE: + case ATA_LPM_MAX_POWER: + case ATA_LPM_UNKNOWN: /* - * if we came here with NOT_AVAILABLE, + * if we came here with ATA_LPM_UNKNOWN, * it just means this is the first time we * have tried to enable - default to max performance, * and let the user go to lower power modes on request. */ ahci_disable_alpm(ap); return 0; - case MIN_POWER: + case ATA_LPM_MIN_POWER: /* configure HBA to enter SLUMBER */ asp = PORT_CMD_ASP; break; - case MEDIUM_POWER: + case ATA_LPM_MED_POWER: /* configure HBA to enter PARTIAL */ asp = 0; break; @@ -762,7 +760,7 @@ static int ahci_enable_alpm(struct ata_port *ap, writel(cmd, port_mmio + PORT_CMD); cmd = readl(port_mmio + PORT_CMD); - /* IPM bits should be set by libata-core */ + /* LPM bits should be set by libata-core */ return 0; } diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c index 92cd5f375b8..380ceb000aa 100644 --- a/drivers/ata/libata-core.c +++ b/drivers/ata/libata-core.c @@ -1030,7 +1030,7 @@ const char *sata_spd_string(unsigned int spd) return spd_str[spd - 1]; } -static int ata_dev_set_dipm(struct ata_device *dev, enum link_pm policy) +static int ata_dev_set_dipm(struct ata_device *dev, enum ata_lpm_policy policy) { struct ata_link *link = dev->link; struct ata_port *ap = link->ap; @@ -1040,14 +1040,14 @@ static int ata_dev_set_dipm(struct ata_device *dev, enum link_pm policy) /* * disallow DIPM for drivers which haven't set - * ATA_FLAG_IPM. This is because when DIPM is enabled, + * ATA_FLAG_LPM. This is because when DIPM is enabled, * phy ready will be set in the interrupt status on * state changes, which will cause some drivers to * think there are errors - additionally drivers will * need to disable hot plug. */ - if (!(ap->flags & ATA_FLAG_IPM) || !ata_dev_enabled(dev)) { - ap->pm_policy = NOT_AVAILABLE; + if (!(ap->flags & ATA_FLAG_LPM) || !ata_dev_enabled(dev)) { + ap->lpm_policy = ATA_LPM_UNKNOWN; return -EINVAL; } @@ -1066,8 +1066,8 @@ static int ata_dev_set_dipm(struct ata_device *dev, enum link_pm policy) return rc; switch (policy) { - case MIN_POWER: - /* no restrictions on IPM transitions */ + case ATA_LPM_MIN_POWER: + /* no restrictions on LPM transitions */ scontrol &= ~(0x3 << 8); rc = sata_scr_write(link, SCR_CONTROL, scontrol); if (rc) @@ -1078,8 +1078,8 @@ static int ata_dev_set_dipm(struct ata_device *dev, enum link_pm policy) err_mask = ata_dev_set_feature(dev, SETFEATURES_SATA_ENABLE, SATA_DIPM); break; - case MEDIUM_POWER: - /* allow IPM to PARTIAL */ + case ATA_LPM_MED_POWER: + /* allow LPM to PARTIAL */ scontrol &= ~(0x1 << 8); scontrol |= (0x2 << 8); rc = sata_scr_write(link, SCR_CONTROL, scontrol); @@ -1087,21 +1087,21 @@ static int ata_dev_set_dipm(struct ata_device *dev, enum link_pm policy) return rc; /* - * we don't have to disable DIPM since IPM flags + * we don't have to disable DIPM since LPM flags * disallow transitions to SLUMBER, which effectively * disable DIPM if it does not support PARTIAL */ break; - case NOT_AVAILABLE: - case MAX_PERFORMANCE: - /* disable all IPM transitions */ + case ATA_LPM_UNKNOWN: + case ATA_LPM_MAX_POWER: + /* disable all LPM transitions */ scontrol |= (0x3 << 8); rc = sata_scr_write(link, SCR_CONTROL, scontrol); if (rc) return rc; /* - * we don't have to disable DIPM since IPM flags + * we don't have to disable DIPM since LPM flags * disallow all transitions which effectively * disable DIPM anyway. */ @@ -1125,9 +1125,9 @@ static int ata_dev_set_dipm(struct ata_device *dev, enum link_pm policy) * enabling Host Initiated Power management. * * Locking: Caller. - * Returns: -EINVAL if IPM is not supported, 0 otherwise. + * Returns: -EINVAL if LPM is not supported, 0 otherwise. */ -void ata_dev_enable_pm(struct ata_device *dev, enum link_pm policy) +void ata_dev_enable_pm(struct ata_device *dev, enum ata_lpm_policy policy) { int rc = 0; struct ata_port *ap = dev->link->ap; @@ -1141,9 +1141,9 @@ void ata_dev_enable_pm(struct ata_device *dev, enum link_pm policy) enable_pm_out: if (rc) - ap->pm_policy = MAX_PERFORMANCE; + ap->lpm_policy = ATA_LPM_MAX_POWER; else - ap->pm_policy = policy; + ap->lpm_policy = policy; return /* rc */; /* hopefully we can use 'rc' eventually */ } @@ -1164,15 +1164,15 @@ static void ata_dev_disable_pm(struct ata_device *dev) { struct ata_port *ap = dev->link->ap; - ata_dev_set_dipm(dev, MAX_PERFORMANCE); + ata_dev_set_dipm(dev, ATA_LPM_MAX_POWER); if (ap->ops->disable_pm) ap->ops->disable_pm(ap); } #endif /* CONFIG_PM */ -void ata_lpm_schedule(struct ata_port *ap, enum link_pm policy) +void ata_lpm_schedule(struct ata_port *ap, enum ata_lpm_policy policy) { - ap->pm_policy = policy; + ap->lpm_policy = policy; ap->link.eh_info.action |= ATA_EH_LPM; ap->link.eh_info.flags |= ATA_EHI_NO_AUTOPSY; ata_port_schedule_eh(ap); @@ -1201,7 +1201,7 @@ static void ata_lpm_disable(struct ata_host *host) for (i = 0; i < host->n_ports; i++) { struct ata_port *ap = host->ports[i]; - ata_lpm_schedule(ap, ap->pm_policy); + ata_lpm_schedule(ap, ap->lpm_policy); } } #endif /* CONFIG_PM */ @@ -2564,7 +2564,7 @@ int ata_dev_configure(struct ata_device *dev) if (dev->flags & ATA_DFLAG_LBA48) dev->max_sectors = ATA_MAX_SECTORS_LBA48; - if (!(dev->horkage & ATA_HORKAGE_IPM)) { + if (!(dev->horkage & ATA_HORKAGE_LPM)) { if (ata_id_has_hipm(dev->id)) dev->flags |= ATA_DFLAG_HIPM; if (ata_id_has_dipm(dev->id)) @@ -2591,11 +2591,11 @@ int ata_dev_configure(struct ata_device *dev) dev->max_sectors = min_t(unsigned int, ATA_MAX_SECTORS_128, dev->max_sectors); - if (ata_dev_blacklisted(dev) & ATA_HORKAGE_IPM) { - dev->horkage |= ATA_HORKAGE_IPM; + if (ata_dev_blacklisted(dev) & ATA_HORKAGE_LPM) { + dev->horkage |= ATA_HORKAGE_LPM; /* reset link pm_policy for this port to no pm */ - ap->pm_policy = MAX_PERFORMANCE; + ap->lpm_policy = ATA_LPM_MAX_POWER; } if (ap->ops->dev_config) diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c index 95838b38223..96aa75ddf87 100644 --- a/drivers/ata/libata-eh.c +++ b/drivers/ata/libata-eh.c @@ -3570,7 +3570,7 @@ int ata_eh_recover(struct ata_port *ap, ata_prereset_fn_t prereset, /* configure link power saving */ if (ehc->i.action & ATA_EH_LPM) ata_for_each_dev(dev, link, ALL) - ata_dev_enable_pm(dev, ap->pm_policy); + ata_dev_enable_pm(dev, ap->lpm_policy); /* this link is okay now */ ehc->i.flags = 0; diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c index f1c0118c6d4..aa56681f68d 100644 --- a/drivers/ata/libata-scsi.c +++ b/drivers/ata/libata-scsi.c @@ -103,72 +103,50 @@ static const u8 def_control_mpage[CONTROL_MPAGE_LEN] = { 0, 30 /* extended self test time, see 05-359r1 */ }; -static const struct { - enum link_pm value; - const char *name; -} link_pm_policy[] = { - { NOT_AVAILABLE, "max_performance" }, - { MIN_POWER, "min_power" }, - { MAX_PERFORMANCE, "max_performance" }, - { MEDIUM_POWER, "medium_power" }, +static const char *ata_lpm_policy_names[] = { + [ATA_LPM_UNKNOWN] = "max_performance", + [ATA_LPM_MAX_POWER] = "max_performance", + [ATA_LPM_MED_POWER] = "medium_power", + [ATA_LPM_MIN_POWER] = "min_power", }; -static const char *ata_scsi_lpm_get(enum link_pm policy) -{ - int i; - - for (i = 0; i < ARRAY_SIZE(link_pm_policy); i++) - if (link_pm_policy[i].value == policy) - return link_pm_policy[i].name; - - return NULL; -} - -static ssize_t ata_scsi_lpm_put(struct device *dev, - struct device_attribute *attr, - const char *buf, size_t count) +static ssize_t ata_scsi_lpm_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) { struct Scsi_Host *shost = class_to_shost(dev); struct ata_port *ap = ata_shost_to_port(shost); - enum link_pm policy = 0; - int i; + enum ata_lpm_policy policy; - /* - * we are skipping array location 0 on purpose - this - * is because a value of NOT_AVAILABLE is displayed - * to the user as max_performance, but when the user - * writes "max_performance", they actually want the - * value to match MAX_PERFORMANCE. - */ - for (i = 1; i < ARRAY_SIZE(link_pm_policy); i++) { - const int len = strlen(link_pm_policy[i].name); - if (strncmp(link_pm_policy[i].name, buf, len) == 0) { - policy = link_pm_policy[i].value; + /* UNKNOWN is internal state, iterate from MAX_POWER */ + for (policy = ATA_LPM_MAX_POWER; + policy < ARRAY_SIZE(ata_lpm_policy_names); policy++) { + const char *name = ata_lpm_policy_names[policy]; + + if (strncmp(name, buf, strlen(name)) == 0) break; - } } - if (!policy) + if (policy == ARRAY_SIZE(ata_lpm_policy_names)) return -EINVAL; ata_lpm_schedule(ap, policy); return count; } -static ssize_t -ata_scsi_lpm_show(struct device *dev, struct device_attribute *attr, char *buf) +static ssize_t ata_scsi_lpm_show(struct device *dev, + struct device_attribute *attr, char *buf) { struct Scsi_Host *shost = class_to_shost(dev); struct ata_port *ap = ata_shost_to_port(shost); - const char *policy = - ata_scsi_lpm_get(ap->pm_policy); - if (!policy) + if (ap->lpm_policy >= ARRAY_SIZE(ata_lpm_policy_names)) return -EINVAL; - return snprintf(buf, 23, "%s\n", policy); + return snprintf(buf, PAGE_SIZE, "%s\n", + ata_lpm_policy_names[ap->lpm_policy]); } DEVICE_ATTR(link_power_management_policy, S_IRUGO | S_IWUSR, - ata_scsi_lpm_show, ata_scsi_lpm_put); + ata_scsi_lpm_show, ata_scsi_lpm_store); EXPORT_SYMBOL_GPL(dev_attr_link_power_management_policy); static ssize_t ata_scsi_park_show(struct device *device, diff --git a/drivers/ata/libata.h b/drivers/ata/libata.h index 142102b94df..1471462e3e3 100644 --- a/drivers/ata/libata.h +++ b/drivers/ata/libata.h @@ -100,8 +100,10 @@ extern int sata_link_init_spd(struct ata_link *link); extern int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg); extern int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg); extern struct ata_port *ata_port_alloc(struct ata_host *host); -extern void ata_dev_enable_pm(struct ata_device *dev, enum link_pm policy); -extern void ata_lpm_schedule(struct ata_port *ap, enum link_pm); +extern void ata_dev_enable_pm(struct ata_device *dev, + enum ata_lpm_policy policy); +extern void ata_lpm_schedule(struct ata_port *ap, + enum ata_lpm_policy policy); extern const char *sata_spd_string(unsigned int spd); /* libata-acpi.c */ -- cgit v1.2.3-70-g09d2