diff options
Diffstat (limited to 'drivers/ata/libahci.c')
| -rw-r--r-- | drivers/ata/libahci.c | 527 |
1 files changed, 435 insertions, 92 deletions
diff --git a/drivers/ata/libahci.c b/drivers/ata/libahci.c index 26d452339e9..d72ce047030 100644 --- a/drivers/ata/libahci.c +++ b/drivers/ata/libahci.c @@ -1,7 +1,7 @@ /* * libahci.c - Common AHCI SATA low-level routines * - * Maintained by: Jeff Garzik <jgarzik@pobox.com> + * Maintained by: Tejun Heo <tj@kernel.org> * Please ALWAYS copy linux-ide@vger.kernel.org * on emails. * @@ -35,7 +35,6 @@ #include <linux/kernel.h> #include <linux/gfp.h> #include <linux/module.h> -#include <linux/init.h> #include <linux/blkdev.h> #include <linux/delay.h> #include <linux/interrupt.h> @@ -45,6 +44,7 @@ #include <scsi/scsi_cmnd.h> #include <linux/libata.h> #include "ahci.h" +#include "libata.h" static int ahci_skip_host_reset; int ahci_ignore_sss; @@ -68,7 +68,6 @@ static ssize_t ahci_transmit_led_message(struct ata_port *ap, u32 state, static int ahci_scr_read(struct ata_link *link, unsigned int sc_reg, u32 *val); static int ahci_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val); -static unsigned int ahci_qc_issue(struct ata_queued_cmd *qc); static bool ahci_qc_fill_rtf(struct ata_queued_cmd *qc); static int ahci_port_start(struct ata_port *ap); static void ahci_port_stop(struct ata_port *ap); @@ -76,16 +75,18 @@ static void ahci_qc_prep(struct ata_queued_cmd *qc); static int ahci_pmp_qc_defer(struct ata_queued_cmd *qc); static void ahci_freeze(struct ata_port *ap); static void ahci_thaw(struct ata_port *ap); +static void ahci_set_aggressive_devslp(struct ata_port *ap, bool sleep); static void ahci_enable_fbs(struct ata_port *ap); static void ahci_disable_fbs(struct ata_port *ap); static void ahci_pmp_attach(struct ata_port *ap); static void ahci_pmp_detach(struct ata_port *ap); static int ahci_softreset(struct ata_link *link, unsigned int *class, unsigned long deadline); +static int ahci_pmp_retry_softreset(struct ata_link *link, unsigned int *class, + unsigned long deadline); static int ahci_hardreset(struct ata_link *link, unsigned int *class, unsigned long deadline); static void ahci_postreset(struct ata_link *link, unsigned int *class); -static void ahci_error_handler(struct ata_port *ap); static void ahci_post_internal_cmd(struct ata_queued_cmd *qc); static void ahci_dev_config(struct ata_device *dev); #ifdef CONFIG_PM @@ -109,6 +110,8 @@ static ssize_t ahci_read_em_buffer(struct device *dev, static ssize_t ahci_store_em_buffer(struct device *dev, struct device_attribute *attr, const char *buf, size_t size); +static ssize_t ahci_show_em_supported(struct device *dev, + struct device_attribute *attr, char *buf); static DEVICE_ATTR(ahci_host_caps, S_IRUGO, ahci_show_host_caps, NULL); static DEVICE_ATTR(ahci_host_cap2, S_IRUGO, ahci_show_host_cap2, NULL); @@ -116,6 +119,7 @@ static DEVICE_ATTR(ahci_host_version, S_IRUGO, ahci_show_host_version, NULL); static DEVICE_ATTR(ahci_port_cmd, S_IRUGO, ahci_show_port_cmd, NULL); static DEVICE_ATTR(em_buffer, S_IWUSR | S_IRUGO, ahci_read_em_buffer, ahci_store_em_buffer); +static DEVICE_ATTR(em_message_supported, S_IRUGO, ahci_show_em_supported, NULL); struct device_attribute *ahci_shost_attrs[] = { &dev_attr_link_power_management_policy, @@ -126,6 +130,7 @@ struct device_attribute *ahci_shost_attrs[] = { &dev_attr_ahci_host_version, &dev_attr_ahci_port_cmd, &dev_attr_em_buffer, + &dev_attr_em_message_supported, NULL }; EXPORT_SYMBOL_GPL(ahci_shost_attrs); @@ -165,6 +170,7 @@ struct ata_port_operations ahci_ops = { .em_store = ahci_led_store, .sw_activity_show = ahci_activity_show, .sw_activity_store = ahci_activity_store, + .transmit_led_message = ahci_transmit_led_message, #ifdef CONFIG_PM .port_suspend = ahci_port_suspend, .port_resume = ahci_port_resume, @@ -174,13 +180,24 @@ struct ata_port_operations ahci_ops = { }; EXPORT_SYMBOL_GPL(ahci_ops); -int ahci_em_messages = 1; +struct ata_port_operations ahci_pmp_retry_srst_ops = { + .inherits = &ahci_ops, + .softreset = ahci_pmp_retry_softreset, +}; +EXPORT_SYMBOL_GPL(ahci_pmp_retry_srst_ops); + +static bool ahci_em_messages __read_mostly = true; EXPORT_SYMBOL_GPL(ahci_em_messages); -module_param(ahci_em_messages, int, 0444); +module_param(ahci_em_messages, bool, 0444); /* add other LED protocol types when they become supported */ MODULE_PARM_DESC(ahci_em_messages, "AHCI Enclosure Management Message control (0 = off, 1 = on)"); +/* device sleep idle timeout in ms */ +static int devslp_idle_timeout __read_mostly = 1000; +module_param(devslp_idle_timeout, int, 0644); +MODULE_PARM_DESC(devslp_idle_timeout, "device sleep idle timeout"); + static void ahci_enable_ahci(void __iomem *mmio) { int i; @@ -282,10 +299,10 @@ static ssize_t ahci_read_em_buffer(struct device *dev, /* the count should not be larger than PAGE_SIZE */ if (count > PAGE_SIZE) { if (printk_ratelimit()) - ata_port_printk(ap, KERN_WARNING, - "EM read buffer size too large: " - "buffer size %u, page size %lu\n", - hpriv->em_buf_sz, PAGE_SIZE); + ata_port_warn(ap, + "EM read buffer size too large: " + "buffer size %u, page size %lu\n", + hpriv->em_buf_sz, PAGE_SIZE); count = PAGE_SIZE; } @@ -343,6 +360,24 @@ static ssize_t ahci_store_em_buffer(struct device *dev, return size; } +static ssize_t ahci_show_em_supported(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); + struct ahci_host_priv *hpriv = ap->host->private_data; + void __iomem *mmio = hpriv->mmio; + u32 em_ctl; + + em_ctl = readl(mmio + HOST_EM_CTL); + + return sprintf(buf, "%s%s%s%s\n", + em_ctl & EM_CTL_LED ? "led " : "", + em_ctl & EM_CTL_SAFTE ? "saf-te " : "", + em_ctl & EM_CTL_SES ? "ses-2 " : "", + em_ctl & EM_CTL_SGPIO ? "sgpio " : ""); +} + /** * ahci_save_initial_config - Save and fixup initial config values * @dev: target AHCI device @@ -357,6 +392,9 @@ static ssize_t ahci_store_em_buffer(struct device *dev, * * If inconsistent, config values are fixed up by this function. * + * If it is not set already this function sets hpriv->start_engine to + * ahci_start_engine. + * * LOCKING: * None. */ @@ -388,51 +426,58 @@ void ahci_save_initial_config(struct device *dev, /* some chips have errata preventing 64bit use */ if ((cap & HOST_CAP_64) && (hpriv->flags & AHCI_HFLAG_32BIT_ONLY)) { - dev_printk(KERN_INFO, dev, - "controller can't do 64bit DMA, forcing 32bit\n"); + dev_info(dev, "controller can't do 64bit DMA, forcing 32bit\n"); cap &= ~HOST_CAP_64; } if ((cap & HOST_CAP_NCQ) && (hpriv->flags & AHCI_HFLAG_NO_NCQ)) { - dev_printk(KERN_INFO, dev, - "controller can't do NCQ, turning off CAP_NCQ\n"); + dev_info(dev, "controller can't do NCQ, turning off CAP_NCQ\n"); cap &= ~HOST_CAP_NCQ; } if (!(cap & HOST_CAP_NCQ) && (hpriv->flags & AHCI_HFLAG_YES_NCQ)) { - dev_printk(KERN_INFO, dev, - "controller can do NCQ, turning on CAP_NCQ\n"); + dev_info(dev, "controller can do NCQ, turning on CAP_NCQ\n"); cap |= HOST_CAP_NCQ; } if ((cap & HOST_CAP_PMP) && (hpriv->flags & AHCI_HFLAG_NO_PMP)) { - dev_printk(KERN_INFO, dev, - "controller can't do PMP, turning off CAP_PMP\n"); + dev_info(dev, "controller can't do PMP, turning off CAP_PMP\n"); cap &= ~HOST_CAP_PMP; } if ((cap & HOST_CAP_SNTF) && (hpriv->flags & AHCI_HFLAG_NO_SNTF)) { - dev_printk(KERN_INFO, dev, - "controller can't do SNTF, turning off CAP_SNTF\n"); + dev_info(dev, + "controller can't do SNTF, turning off CAP_SNTF\n"); cap &= ~HOST_CAP_SNTF; } + if ((cap2 & HOST_CAP2_SDS) && (hpriv->flags & AHCI_HFLAG_NO_DEVSLP)) { + dev_info(dev, + "controller can't do DEVSLP, turning off\n"); + cap2 &= ~HOST_CAP2_SDS; + cap2 &= ~HOST_CAP2_SADM; + } + if (!(cap & HOST_CAP_FBS) && (hpriv->flags & AHCI_HFLAG_YES_FBS)) { - dev_printk(KERN_INFO, dev, - "controller can do FBS, turning on CAP_FBS\n"); + dev_info(dev, "controller can do FBS, turning on CAP_FBS\n"); cap |= HOST_CAP_FBS; } + if ((cap & HOST_CAP_FBS) && (hpriv->flags & AHCI_HFLAG_NO_FBS)) { + dev_info(dev, "controller can't do FBS, turning off CAP_FBS\n"); + cap &= ~HOST_CAP_FBS; + } + if (force_port_map && port_map != force_port_map) { - dev_printk(KERN_INFO, dev, "forcing port_map 0x%x -> 0x%x\n", - port_map, force_port_map); + dev_info(dev, "forcing port_map 0x%x -> 0x%x\n", + port_map, force_port_map); port_map = force_port_map; } if (mask_port_map) { - dev_printk(KERN_ERR, dev, "masking port_map 0x%x -> 0x%x\n", - port_map, - port_map & mask_port_map); + dev_warn(dev, "masking port_map 0x%x -> 0x%x\n", + port_map, + port_map & mask_port_map); port_map &= mask_port_map; } @@ -448,10 +493,9 @@ void ahci_save_initial_config(struct device *dev, * port_map and let it be generated from n_ports. */ if (map_ports > ahci_nr_ports(cap)) { - dev_printk(KERN_WARNING, dev, - "implemented port map (0x%x) contains more " - "ports than nr_ports (%u), using nr_ports\n", - port_map, ahci_nr_ports(cap)); + dev_warn(dev, + "implemented port map (0x%x) contains more ports than nr_ports (%u), using nr_ports\n", + port_map, ahci_nr_ports(cap)); port_map = 0; } } @@ -459,8 +503,7 @@ void ahci_save_initial_config(struct device *dev, /* fabricate port_map from cap.nr_ports */ if (!port_map) { port_map = (1 << ahci_nr_ports(cap)) - 1; - dev_printk(KERN_WARNING, dev, - "forcing PORTS_IMPL to 0x%x\n", port_map); + dev_warn(dev, "forcing PORTS_IMPL to 0x%x\n", port_map); /* write the fixed up value to the PI register */ hpriv->saved_port_map = port_map; @@ -470,6 +513,9 @@ void ahci_save_initial_config(struct device *dev, hpriv->cap = cap; hpriv->cap2 = cap2; hpriv->port_map = port_map; + + if (!hpriv->start_engine) + hpriv->start_engine = ahci_start_engine; } EXPORT_SYMBOL_GPL(ahci_save_initial_config); @@ -573,7 +619,7 @@ int ahci_stop_engine(struct ata_port *ap) } EXPORT_SYMBOL_GPL(ahci_stop_engine); -static void ahci_start_fis_rx(struct ata_port *ap) +void ahci_start_fis_rx(struct ata_port *ap) { void __iomem *port_mmio = ahci_port_base(ap); struct ahci_host_priv *hpriv = ap->host->private_data; @@ -599,6 +645,7 @@ static void ahci_start_fis_rx(struct ata_port *ap) /* flush */ readl(port_mmio + PORT_CMD); } +EXPORT_SYMBOL_GPL(ahci_start_fis_rx); static int ahci_stop_fis_rx(struct ata_port *ap) { @@ -679,6 +726,16 @@ static int ahci_set_lpm(struct ata_link *link, enum ata_lpm_policy policy, } } + /* set aggressive device sleep */ + if ((hpriv->cap2 & HOST_CAP2_SDS) && + (hpriv->cap2 & HOST_CAP2_SADM) && + (link->device->flags & ATA_DFLAG_DEVSLP)) { + if (policy == ATA_LPM_MIN_POWER) + ahci_set_aggressive_devslp(ap, true); + else + ahci_set_aggressive_devslp(ap, false); + } + if (policy == ATA_LPM_MAX_POWER) { sata_link_scr_lpm(link, policy, false); @@ -714,6 +771,7 @@ static void ahci_power_down(struct ata_port *ap) static void ahci_start_port(struct ata_port *ap) { + struct ahci_host_priv *hpriv = ap->host->private_data; struct ahci_port_priv *pp = ap->private_data; struct ata_link *link; struct ahci_em_priv *emp; @@ -724,7 +782,8 @@ static void ahci_start_port(struct ata_port *ap) ahci_start_fis_rx(ap); /* enable DMA */ - ahci_start_engine(ap); + if (!(hpriv->flags & AHCI_HFLAG_DELAY_ENGINE)) + hpriv->start_engine(ap); /* turn on LEDs */ if (ap->flags & ATA_FLAG_EM) { @@ -733,11 +792,19 @@ static void ahci_start_port(struct ata_port *ap) /* EM Transmit bit maybe busy during init */ for (i = 0; i < EM_MAX_RETRY; i++) { - rc = ahci_transmit_led_message(ap, + rc = ap->ops->transmit_led_message(ap, emp->led_state, 4); + /* + * If busy, give a breather but do not + * release EH ownership by using msleep() + * instead of ata_msleep(). EM Transmit + * bit is busy for the whole host and + * releasing ownership will cause other + * ports to fail the same way. + */ if (rc == -EBUSY) - ata_msleep(ap, 1); + msleep(1); else break; } @@ -800,8 +867,8 @@ int ahci_reset_controller(struct ata_host *host) HOST_RESET, 10, 1000); if (tmp & HOST_RESET) { - dev_printk(KERN_ERR, host->dev, - "controller reset failed (0x%x)\n", tmp); + dev_err(host->dev, "controller reset failed (0x%x)\n", + tmp); return -EIO; } @@ -813,8 +880,7 @@ int ahci_reset_controller(struct ata_host *host) */ ahci_restore_initial_config(host); } else - dev_printk(KERN_INFO, host->dev, - "skipping global host reset\n"); + dev_info(host->dev, "skipping global host reset\n"); return 0; } @@ -875,7 +941,7 @@ static void ahci_sw_activity_blink(unsigned long arg) led_message |= (1 << 16); } spin_unlock_irqrestore(ap->lock, flags); - ahci_transmit_led_message(ap, led_message, 4); + ap->ops->transmit_led_message(ap, led_message, 4); } static void ahci_init_sw_activity(struct ata_link *link) @@ -983,12 +1049,13 @@ 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, size_t size) { - int state; + unsigned int state; int pmp; struct ahci_port_priv *pp = ap->private_data; struct ahci_em_priv *emp; - state = simple_strtoul(buf, NULL, 0); + if (kstrtouint(buf, 0, &state) < 0) + return -EINVAL; /* get the slot number from the message */ pmp = (state & EM_MSG_LED_PMP_SLOT) >> 8; @@ -1004,7 +1071,7 @@ static ssize_t ahci_led_store(struct ata_port *ap, const char *buf, if (emp->blink_policy) state &= ~EM_MSG_LED_VALUE_ACTIVITY; - return ahci_transmit_led_message(ap, state, size); + return ap->ops->transmit_led_message(ap, state, size); } static ssize_t ahci_activity_store(struct ata_device *dev, enum sw_activity val) @@ -1023,7 +1090,7 @@ static ssize_t ahci_activity_store(struct ata_device *dev, enum sw_activity val) /* set the LED to OFF */ port_led_state &= EM_MSG_LED_VALUE_OFF; port_led_state |= (ap->port_no | (link->pmp << 8)); - ahci_transmit_led_message(ap, port_led_state, 4); + ap->ops->transmit_led_message(ap, port_led_state, 4); } else { link->flags |= ATA_LFLAG_SW_ACTIVITY; if (val == BLINK_OFF) { @@ -1031,7 +1098,7 @@ static ssize_t ahci_activity_store(struct ata_device *dev, enum sw_activity val) port_led_state &= EM_MSG_LED_VALUE_OFF; port_led_state |= (ap->port_no | (link->pmp << 8)); port_led_state |= EM_MSG_LED_VALUE_ON; /* check this */ - ahci_transmit_led_message(ap, port_led_state, 4); + ap->ops->transmit_led_message(ap, port_led_state, 4); } } emp->blink_policy = val; @@ -1110,12 +1177,12 @@ static void ahci_dev_config(struct ata_device *dev) if (hpriv->flags & AHCI_HFLAG_SECT255) { dev->max_sectors = 255; - ata_dev_printk(dev, KERN_INFO, - "SB600 AHCI: limiting to 255 sectors per cmd\n"); + ata_dev_info(dev, + "SB600 AHCI: limiting to 255 sectors per cmd\n"); } } -static unsigned int ahci_dev_classify(struct ata_port *ap) +unsigned int ahci_dev_classify(struct ata_port *ap) { void __iomem *port_mmio = ahci_port_base(ap); struct ata_taskfile tf; @@ -1129,6 +1196,7 @@ static unsigned int ahci_dev_classify(struct ata_port *ap) return ata_dev_classify(&tf); } +EXPORT_SYMBOL_GPL(ahci_dev_classify); void ahci_fill_cmd_slot(struct ahci_port_priv *pp, unsigned int tag, u32 opts) @@ -1184,7 +1252,7 @@ int ahci_kick_engine(struct ata_port *ap) /* restart engine */ out_restart: - ahci_start_engine(ap); + hpriv->start_engine(ap); return rc; } EXPORT_SYMBOL_GPL(ahci_kick_engine); @@ -1225,9 +1293,11 @@ int ahci_do_softreset(struct ata_link *link, unsigned int *class, { struct ata_port *ap = link->ap; struct ahci_host_priv *hpriv = ap->host->private_data; + struct ahci_port_priv *pp = ap->private_data; const char *reason = NULL; unsigned long now, msecs; struct ata_taskfile tf; + bool fbs_disabled = false; int rc; DPRINTK("ENTER\n"); @@ -1235,8 +1305,17 @@ int ahci_do_softreset(struct ata_link *link, unsigned int *class, /* prepare for SRST (AHCI-1.1 10.4.1) */ rc = ahci_kick_engine(ap); if (rc && rc != -EOPNOTSUPP) - ata_link_printk(link, KERN_WARNING, - "failed to reset engine (errno=%d)\n", rc); + ata_link_warn(link, "failed to reset engine (errno=%d)\n", rc); + + /* + * According to AHCI-1.2 9.3.9: if FBS is enable, software shall + * clear PxFBS.EN to '0' prior to issuing software reset to devices + * that is attached to port multiplier. + */ + if (!ata_is_host_link(link) && pp->fbs_enabled) { + ahci_disable_fbs(ap); + fbs_disabled = true; + } ata_tf_init(link->device, &tf); @@ -1269,8 +1348,7 @@ int ahci_do_softreset(struct ata_link *link, unsigned int *class, * be trusted. Treat device readiness timeout as link * offline. */ - ata_link_printk(link, KERN_INFO, - "device not ready, treating as offline\n"); + ata_link_info(link, "device not ready, treating as offline\n"); *class = ATA_DEV_NONE; } else if (rc) { /* link occupied, -ENODEV too is an error */ @@ -1279,11 +1357,15 @@ int ahci_do_softreset(struct ata_link *link, unsigned int *class, } else *class = ahci_dev_classify(ap); + /* re-enable FBS if disabled before */ + if (fbs_disabled) + ahci_enable_fbs(ap); + DPRINTK("EXIT, class=%u\n", *class); return 0; fail: - ata_link_printk(link, KERN_ERR, "softreset failed (%s)\n", reason); + ata_link_err(link, "softreset failed (%s)\n", reason); return rc; } @@ -1307,12 +1389,62 @@ static int ahci_softreset(struct ata_link *link, unsigned int *class, } EXPORT_SYMBOL_GPL(ahci_do_softreset); +static int ahci_bad_pmp_check_ready(struct ata_link *link) +{ + void __iomem *port_mmio = ahci_port_base(link->ap); + u8 status = readl(port_mmio + PORT_TFDATA) & 0xFF; + u32 irq_status = readl(port_mmio + PORT_IRQ_STAT); + + /* + * There is no need to check TFDATA if BAD PMP is found due to HW bug, + * which can save timeout delay. + */ + if (irq_status & PORT_IRQ_BAD_PMP) + return -EIO; + + return ata_check_ready(status); +} + +static int ahci_pmp_retry_softreset(struct ata_link *link, unsigned int *class, + unsigned long deadline) +{ + struct ata_port *ap = link->ap; + void __iomem *port_mmio = ahci_port_base(ap); + int pmp = sata_srst_pmp(link); + int rc; + u32 irq_sts; + + DPRINTK("ENTER\n"); + + rc = ahci_do_softreset(link, class, pmp, deadline, + ahci_bad_pmp_check_ready); + + /* + * Soft reset fails with IPMS set when PMP is enabled but + * SATA HDD/ODD is connected to SATA port, do soft reset + * again to port 0. + */ + if (rc == -EIO) { + irq_sts = readl(port_mmio + PORT_IRQ_STAT); + if (irq_sts & PORT_IRQ_BAD_PMP) { + ata_link_warn(link, + "applying PMP SRST workaround " + "and retrying\n"); + rc = ahci_do_softreset(link, class, 0, deadline, + ahci_check_ready); + } + } + + return rc; +} + 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; + struct ahci_host_priv *hpriv = ap->host->private_data; u8 *d2h_fis = pp->rx_fis + RX_FIS_D2H_REG; struct ata_taskfile tf; bool online; @@ -1324,13 +1456,13 @@ static int ahci_hardreset(struct ata_link *link, unsigned int *class, /* clear D2H reception area to properly wait for D2H FIS */ ata_tf_init(link->device, &tf); - tf.command = 0x80; + tf.command = ATA_BUSY; ata_tf_to_fis(&tf, 0, 0, d2h_fis); rc = sata_link_hardreset(link, timing, deadline, &online, ahci_check_ready); - ahci_start_engine(ap); + hpriv->start_engine(ap); if (online) *class = ahci_dev_classify(ap); @@ -1452,8 +1584,7 @@ static void ahci_fbs_dec_intr(struct ata_port *ap) } if (fbs & PORT_FBS_DEC) - dev_printk(KERN_ERR, ap->host->dev, - "failed to clear device error\n"); + dev_err(ap->host->dev, "failed to clear device error\n"); } static void ahci_error_intr(struct ata_port *ap, u32 irq_stat) @@ -1473,8 +1604,7 @@ static void ahci_error_intr(struct ata_port *ap, u32 irq_stat) u32 fbs = readl(port_mmio + PORT_FBS); int pmp = fbs >> PORT_FBS_DWE_OFFSET; - if ((fbs & PORT_FBS_SDE) && (pmp < ap->nr_pmp_links) && - ata_link_online(&ap->pmp_link[pmp])) { + if ((fbs & PORT_FBS_SDE) && (pmp < ap->nr_pmp_links)) { link = &ap->pmp_link[pmp]; fbs_need_dec = true; } @@ -1518,7 +1648,7 @@ static void ahci_error_intr(struct ata_port *ap, u32 irq_stat) } if (irq_stat & PORT_IRQ_UNK_FIS) { - u32 *unk = (u32 *)(pp->rx_fis + RX_FIS_UNK); + u32 *unk = pp->rx_fis + RX_FIS_UNK; active_ehi->err_mask |= AC_ERR_HSM; active_ehi->action |= ATA_EH_RESET; @@ -1568,19 +1698,16 @@ static void ahci_error_intr(struct ata_port *ap, u32 irq_stat) ata_port_abort(ap); } -static void ahci_port_intr(struct ata_port *ap) +static void ahci_handle_port_interrupt(struct ata_port *ap, + void __iomem *port_mmio, u32 status) { - void __iomem *port_mmio = ahci_port_base(ap); struct ata_eh_info *ehi = &ap->link.eh_info; struct ahci_port_priv *pp = ap->private_data; struct ahci_host_priv *hpriv = ap->host->private_data; int resetting = !!(ap->pflags & ATA_PFLAG_RESETTING); - u32 status, qc_active = 0; + u32 qc_active = 0; int rc; - status = readl(port_mmio + PORT_IRQ_STAT); - writel(status, port_mmio + PORT_IRQ_STAT); - /* ignore BAD_PMP while resetting */ if (unlikely(resetting)) status &= ~PORT_IRQ_BAD_PMP; @@ -1656,6 +1783,107 @@ static void ahci_port_intr(struct ata_port *ap) } } +static void ahci_port_intr(struct ata_port *ap) +{ + void __iomem *port_mmio = ahci_port_base(ap); + u32 status; + + status = readl(port_mmio + PORT_IRQ_STAT); + writel(status, port_mmio + PORT_IRQ_STAT); + + ahci_handle_port_interrupt(ap, port_mmio, status); +} + +irqreturn_t ahci_thread_fn(int irq, void *dev_instance) +{ + struct ata_port *ap = dev_instance; + struct ahci_port_priv *pp = ap->private_data; + void __iomem *port_mmio = ahci_port_base(ap); + unsigned long flags; + u32 status; + + spin_lock_irqsave(&ap->host->lock, flags); + status = pp->intr_status; + if (status) + pp->intr_status = 0; + spin_unlock_irqrestore(&ap->host->lock, flags); + + spin_lock_bh(ap->lock); + ahci_handle_port_interrupt(ap, port_mmio, status); + spin_unlock_bh(ap->lock); + + return IRQ_HANDLED; +} +EXPORT_SYMBOL_GPL(ahci_thread_fn); + +static void ahci_hw_port_interrupt(struct ata_port *ap) +{ + void __iomem *port_mmio = ahci_port_base(ap); + struct ahci_port_priv *pp = ap->private_data; + u32 status; + + status = readl(port_mmio + PORT_IRQ_STAT); + writel(status, port_mmio + PORT_IRQ_STAT); + + pp->intr_status |= status; +} + +irqreturn_t ahci_hw_interrupt(int irq, void *dev_instance) +{ + struct ata_port *ap_this = dev_instance; + struct ahci_port_priv *pp = ap_this->private_data; + struct ata_host *host = ap_this->host; + struct ahci_host_priv *hpriv = host->private_data; + void __iomem *mmio = hpriv->mmio; + unsigned int i; + u32 irq_stat, irq_masked; + + VPRINTK("ENTER\n"); + + spin_lock(&host->lock); + + irq_stat = readl(mmio + HOST_IRQ_STAT); + + if (!irq_stat) { + u32 status = pp->intr_status; + + spin_unlock(&host->lock); + + VPRINTK("EXIT\n"); + + return status ? IRQ_WAKE_THREAD : IRQ_NONE; + } + + irq_masked = irq_stat & hpriv->port_map; + + for (i = 0; i < host->n_ports; i++) { + struct ata_port *ap; + + if (!(irq_masked & (1 << i))) + continue; + + ap = host->ports[i]; + if (ap) { + ahci_hw_port_interrupt(ap); + VPRINTK("port %u\n", i); + } else { + VPRINTK("port %u (no irq)\n", i); + if (ata_ratelimit()) + dev_warn(host->dev, + "interrupt on disabled port %u\n", i); + } + } + + writel(irq_stat, mmio + HOST_IRQ_STAT); + + spin_unlock(&host->lock); + + VPRINTK("EXIT\n"); + + return IRQ_WAKE_THREAD; +} +EXPORT_SYMBOL_GPL(ahci_hw_interrupt); + irqreturn_t ahci_interrupt(int irq, void *dev_instance) { struct ata_host *host = dev_instance; @@ -1691,8 +1919,8 @@ irqreturn_t ahci_interrupt(int irq, void *dev_instance) } else { VPRINTK("port %u (no irq)\n", i); if (ata_ratelimit()) - dev_printk(KERN_WARNING, host->dev, - "interrupt on disabled port %u\n", i); + dev_warn(host->dev, + "interrupt on disabled port %u\n", i); } handled = 1; @@ -1717,7 +1945,7 @@ irqreturn_t ahci_interrupt(int irq, void *dev_instance) } EXPORT_SYMBOL_GPL(ahci_interrupt); -static unsigned int ahci_qc_issue(struct ata_queued_cmd *qc) +unsigned int ahci_qc_issue(struct ata_queued_cmd *qc) { struct ata_port *ap = qc->ap; void __iomem *port_mmio = ahci_port_base(ap); @@ -1746,6 +1974,7 @@ static unsigned int ahci_qc_issue(struct ata_queued_cmd *qc) return 0; } +EXPORT_SYMBOL_GPL(ahci_qc_issue); static bool ahci_qc_fill_rtf(struct ata_queued_cmd *qc) { @@ -1796,12 +2025,14 @@ static void ahci_thaw(struct ata_port *ap) writel(pp->intr_mask, port_mmio + PORT_IRQ_MASK); } -static void ahci_error_handler(struct ata_port *ap) +void ahci_error_handler(struct ata_port *ap) { + struct ahci_host_priv *hpriv = ap->host->private_data; + if (!(ap->pflags & ATA_PFLAG_FROZEN)) { /* restart engine */ ahci_stop_engine(ap); - ahci_start_engine(ap); + hpriv->start_engine(ap); } sata_pmp_error_handler(ap); @@ -1809,6 +2040,7 @@ static void ahci_error_handler(struct ata_port *ap) if (!ata_dev_enabled(ap->link.device)) ahci_stop_engine(ap); } +EXPORT_SYMBOL_GPL(ahci_error_handler); static void ahci_post_internal_cmd(struct ata_queued_cmd *qc) { @@ -1819,8 +2051,85 @@ static void ahci_post_internal_cmd(struct ata_queued_cmd *qc) ahci_kick_engine(ap); } +static void ahci_set_aggressive_devslp(struct ata_port *ap, bool sleep) +{ + struct ahci_host_priv *hpriv = ap->host->private_data; + void __iomem *port_mmio = ahci_port_base(ap); + struct ata_device *dev = ap->link.device; + u32 devslp, dm, dito, mdat, deto; + int rc; + unsigned int err_mask; + + devslp = readl(port_mmio + PORT_DEVSLP); + if (!(devslp & PORT_DEVSLP_DSP)) { + dev_err(ap->host->dev, "port does not support device sleep\n"); + return; + } + + /* disable device sleep */ + if (!sleep) { + if (devslp & PORT_DEVSLP_ADSE) { + writel(devslp & ~PORT_DEVSLP_ADSE, + port_mmio + PORT_DEVSLP); + err_mask = ata_dev_set_feature(dev, + SETFEATURES_SATA_DISABLE, + SATA_DEVSLP); + if (err_mask && err_mask != AC_ERR_DEV) + ata_dev_warn(dev, "failed to disable DEVSLP\n"); + } + return; + } + + /* device sleep was already enabled */ + if (devslp & PORT_DEVSLP_ADSE) + return; + + /* set DITO, MDAT, DETO and enable DevSlp, need to stop engine first */ + rc = ahci_stop_engine(ap); + if (rc) + return; + + dm = (devslp & PORT_DEVSLP_DM_MASK) >> PORT_DEVSLP_DM_OFFSET; + dito = devslp_idle_timeout / (dm + 1); + if (dito > 0x3ff) + dito = 0x3ff; + + /* Use the nominal value 10 ms if the read MDAT is zero, + * the nominal value of DETO is 20 ms. + */ + if (dev->devslp_timing[ATA_LOG_DEVSLP_VALID] & + ATA_LOG_DEVSLP_VALID_MASK) { + mdat = dev->devslp_timing[ATA_LOG_DEVSLP_MDAT] & + ATA_LOG_DEVSLP_MDAT_MASK; + if (!mdat) + mdat = 10; + deto = dev->devslp_timing[ATA_LOG_DEVSLP_DETO]; + if (!deto) + deto = 20; + } else { + mdat = 10; + deto = 20; + } + + devslp |= ((dito << PORT_DEVSLP_DITO_OFFSET) | + (mdat << PORT_DEVSLP_MDAT_OFFSET) | + (deto << PORT_DEVSLP_DETO_OFFSET) | + PORT_DEVSLP_ADSE); + writel(devslp, port_mmio + PORT_DEVSLP); + + hpriv->start_engine(ap); + + /* enable device sleep feature for the drive */ + err_mask = ata_dev_set_feature(dev, + SETFEATURES_SATA_ENABLE, + SATA_DEVSLP); + if (err_mask && err_mask != AC_ERR_DEV) + ata_dev_warn(dev, "failed to enable DEVSLP\n"); +} + static void ahci_enable_fbs(struct ata_port *ap) { + struct ahci_host_priv *hpriv = ap->host->private_data; struct ahci_port_priv *pp = ap->private_data; void __iomem *port_mmio = ahci_port_base(ap); u32 fbs; @@ -1843,17 +2152,18 @@ static void ahci_enable_fbs(struct ata_port *ap) writel(fbs | PORT_FBS_EN, port_mmio + PORT_FBS); fbs = readl(port_mmio + PORT_FBS); if (fbs & PORT_FBS_EN) { - dev_printk(KERN_INFO, ap->host->dev, "FBS is enabled.\n"); + dev_info(ap->host->dev, "FBS is enabled\n"); pp->fbs_enabled = true; pp->fbs_last_dev = -1; /* initialization */ } else - dev_printk(KERN_ERR, ap->host->dev, "Failed to enable FBS\n"); + dev_err(ap->host->dev, "Failed to enable FBS\n"); - ahci_start_engine(ap); + hpriv->start_engine(ap); } static void ahci_disable_fbs(struct ata_port *ap) { + struct ahci_host_priv *hpriv = ap->host->private_data; struct ahci_port_priv *pp = ap->private_data; void __iomem *port_mmio = ahci_port_base(ap); u32 fbs; @@ -1875,13 +2185,13 @@ static void ahci_disable_fbs(struct ata_port *ap) writel(fbs & ~PORT_FBS_EN, port_mmio + PORT_FBS); fbs = readl(port_mmio + PORT_FBS); if (fbs & PORT_FBS_EN) - dev_printk(KERN_ERR, ap->host->dev, "Failed to disable FBS\n"); + dev_err(ap->host->dev, "Failed to disable FBS\n"); else { - dev_printk(KERN_INFO, ap->host->dev, "FBS is disabled.\n"); + dev_info(ap->host->dev, "FBS is disabled\n"); pp->fbs_enabled = false; } - ahci_start_engine(ap); + hpriv->start_engine(ap); } static void ahci_pmp_attach(struct ata_port *ap) @@ -1897,7 +2207,17 @@ static void ahci_pmp_attach(struct ata_port *ap) ahci_enable_fbs(ap); pp->intr_mask |= PORT_IRQ_BAD_PMP; - writel(pp->intr_mask, port_mmio + PORT_IRQ_MASK); + + /* + * We must not change the port interrupt mask register if the + * port is marked frozen, the value in pp->intr_mask will be + * restored later when the port is thawed. + * + * Note that during initialization, the port is marked as + * frozen since the irq handler is not yet registered. + */ + if (!(ap->pflags & ATA_PFLAG_FROZEN)) + writel(pp->intr_mask, port_mmio + PORT_IRQ_MASK); } static void ahci_pmp_detach(struct ata_port *ap) @@ -1913,7 +2233,10 @@ static void ahci_pmp_detach(struct ata_port *ap) writel(cmd, port_mmio + PORT_CMD); pp->intr_mask &= ~PORT_IRQ_BAD_PMP; - writel(pp->intr_mask, port_mmio + PORT_IRQ_MASK); + + /* see comment above in ahci_pmp_attach() */ + if (!(ap->pflags & ATA_PFLAG_FROZEN)) + writel(pp->intr_mask, port_mmio + PORT_IRQ_MASK); } int ahci_port_resume(struct ata_port *ap) @@ -1940,8 +2263,8 @@ static int ahci_port_suspend(struct ata_port *ap, pm_message_t mesg) if (rc == 0) ahci_power_down(ap); else { - ata_port_printk(ap, KERN_ERR, "%s (%d)\n", emsg, rc); - ahci_start_port(ap); + ata_port_err(ap, "%s (%d)\n", emsg, rc); + ata_port_freeze(ap); } return rc; @@ -1961,6 +2284,16 @@ static int ahci_port_start(struct ata_port *ap) if (!pp) return -ENOMEM; + if (ap->host->n_ports > 1) { + pp->irq_desc = devm_kzalloc(dev, 8, GFP_KERNEL); + if (!pp->irq_desc) { + devm_kfree(dev, pp); + return -ENOMEM; + } + snprintf(pp->irq_desc, 8, + "%s%d", dev_driver_string(dev), ap->port_no); + } + /* check FBS capability */ if ((hpriv->cap & HOST_CAP_FBS) && sata_pmp_supported(ap)) { void __iomem *port_mmio = ahci_port_base(ap); @@ -1968,14 +2301,12 @@ static int ahci_port_start(struct ata_port *ap) if (cmd & PORT_CMD_FBSCP) pp->fbs_supported = true; else if (hpriv->flags & AHCI_HFLAG_YES_FBS) { - dev_printk(KERN_INFO, dev, - "port %d can do FBS, forcing FBSCP\n", - ap->port_no); + dev_info(dev, "port %d can do FBS, forcing FBSCP\n", + ap->port_no); pp->fbs_supported = true; } else - dev_printk(KERN_WARNING, dev, - "port %d is not capable of FBS\n", - ap->port_no); + dev_warn(dev, "port %d is not capable of FBS\n", + ap->port_no); } if (pp->fbs_supported) { @@ -2023,6 +2354,14 @@ static int ahci_port_start(struct ata_port *ap) */ pp->intr_mask = DEF_PORT_IRQ; + /* + * Switch to per-port locking in case each port has its own MSI vector. + */ + if ((hpriv->flags & AHCI_HFLAG_MULTI_MSI)) { + spin_lock_init(&pp->lock); + ap->lock = &pp->lock; + } + ap->private_data = pp; /* engage engines, captain */ @@ -2037,7 +2376,7 @@ static void ahci_port_stop(struct ata_port *ap) /* de-initialize port */ rc = ahci_deinit_port(ap, &emsg); if (rc) - ata_port_printk(ap, KERN_WARNING, "%s (%d)\n", emsg, rc); + ata_port_warn(ap, "%s (%d)\n", emsg, rc); } void ahci_print_info(struct ata_host *host, const char *scc_s) @@ -2082,7 +2421,8 @@ void ahci_print_info(struct ata_host *host, const char *scc_s) "flags: " "%s%s%s%s%s%s%s" "%s%s%s%s%s%s%s" - "%s%s%s%s%s%s\n" + "%s%s%s%s%s%s%s" + "%s%s\n" , cap & HOST_CAP_64 ? "64bit " : "", @@ -2102,6 +2442,9 @@ void ahci_print_info(struct ata_host *host, const char *scc_s) cap & HOST_CAP_CCC ? "ccc " : "", cap & HOST_CAP_EMS ? "ems " : "", cap & HOST_CAP_SXS ? "sxs " : "", + cap2 & HOST_CAP2_DESO ? "deso " : "", + cap2 & HOST_CAP2_SADM ? "sadm " : "", + cap2 & HOST_CAP2_SDS ? "sds " : "", cap2 & HOST_CAP2_APST ? "apst " : "", cap2 & HOST_CAP2_NVMHCI ? "nvmp " : "", cap2 & HOST_CAP2_BOH ? "boh " : "" |