/* * libahci.c - Common AHCI SATA low-level routines * * Maintained by: Jeff Garzik * Please ALWAYS copy linux-ide@vger.kernel.org * on emails. * * Copyright 2004-2005 Red Hat, Inc. * * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2, or (at your option) * any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; see the file COPYING. If not, write to * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. * * * libata documentation is available via 'make {ps|pdf}docs', * as Documentation/DocBook/libata.* * * AHCI hardware documentation: * http://www.intel.com/technology/serialata/pdf/rev1_0.pdf * http://www.intel.com/technology/serialata/pdf/rev1_1.pdf * */ #include #include #include #include #include #include #include #include #include #include #include #include "ahci.h" static int ahci_skip_host_reset; int ahci_ignore_sss; EXPORT_SYMBOL_GPL(ahci_ignore_sss); module_param_named(skip_host_reset, ahci_skip_host_reset, int, 0444); 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 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, size_t size); static ssize_t ahci_transmit_led_message(struct ata_port *ap, u32 state, ssize_t size); 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); 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_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_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 int ahci_port_resume(struct ata_port *ap); static void ahci_dev_config(struct ata_device *dev); static void ahci_fill_cmd_slot(struct ahci_port_priv *pp, unsigned int tag, u32 opts); #ifdef CONFIG_PM static int ahci_port_suspend(struct ata_port *ap, pm_message_t mesg); #endif static ssize_t ahci_activity_show(struct ata_device *dev, char *buf); static ssize_t ahci_activity_store(struct ata_device *dev, enum sw_activity val); static void ahci_init_sw_activity(struct ata_link *link); static ssize_t ahci_show_host_caps(struct device *dev, struct device_attribute *attr, char *buf); static ssize_t ahci_show_host_cap2(struct device *dev, struct device_attribute *attr, char *buf); static ssize_t ahci_show_host_version(struct device *dev, struct device_attribute *attr, char *buf); static ssize_t ahci_show_port_cmd(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); 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 struct device_attribute *ahci_shost_attrs[] = { &dev_attr_link_power_management_policy, &dev_attr_em_message_type, &dev_attr_em_message, &dev_attr_ahci_host_caps, &dev_attr_ahci_host_cap2, &dev_attr_ahci_host_version, &dev_attr_ahci_port_cmd, NULL }; static struct device_attribute *ahci_sdev_attrs[] = { &dev_attr_sw_activity, &dev_attr_unload_heads, NULL }; struct scsi_host_template ahci_sht = { ATA_NCQ_SHT("ahci"), .can_queue = AHCI_MAX_CMDS - 1, .sg_tablesize = AHCI_MAX_SG, .dma_boundary = AHCI_DMA_BOUNDARY, .shost_attrs = ahci_shost_attrs, .sdev_attrs = ahci_sdev_attrs, }; EXPORT_SYMBOL_GPL(ahci_sht); struct ata_port_operations ahci_ops = { .inherits = &sata_pmp_port_ops, .qc_defer = ahci_pmp_qc_defer, .qc_prep = ahci_qc_prep, .qc_issue = ahci_qc_issue, .qc_fill_rtf = ahci_qc_fill_rtf, .freeze = ahci_freeze, .thaw = ahci_thaw, .softreset = ahci_softreset, .hardreset = ahci_hardreset, .postreset = ahci_postreset, .pmp_softreset = ahci_softreset, .error_handler = ahci_error_handler, .post_internal_cmd = ahci_post_internal_cmd, .dev_config = ahci_dev_config, .scr_read = ahci_scr_read, .scr_write = ahci_scr_write, .pmp_attach = ahci_pmp_attach, .pmp_detach = ahci_pmp_detach, .enable_pm = ahci_enable_alpm, .disable_pm = ahci_disable_alpm, .em_show = ahci_led_show, .em_store = ahci_led_store, .sw_activity_show = ahci_activity_show, .sw_activity_store = ahci_activity_store, #ifdef CONFIG_PM .port_suspend = ahci_port_suspend, .port_resume = ahci_port_resume, #endif .port_start = ahci_port_start, .port_stop = ahci_port_stop, }; EXPORT_SYMBOL_GPL(ahci_ops); int ahci_em_messages = 1; EXPORT_SYMBOL_GPL(ahci_em_messages); module_param(ahci_em_messages, int, 0444); /* add other LED protocol types when they become supported */ MODULE_PARM_DESC(ahci_em_messages, "Set AHCI Enclosure Management Message type (0 = disabled, 1 = LED"); static void ahci_enable_ahci(void __iomem *mmio) { int i; u32 tmp; /* turn on AHCI_EN */ tmp = readl(mmio + HOST_CTL); if (tmp & HOST_AHCI_EN) return; /* Some controllers need AHCI_EN to be written multiple times. * Try a few times before giving up. */ for (i = 0; i < 5; i++) { tmp |= HOST_AHCI_EN; writel(tmp, mmio + HOST_CTL); tmp = readl(mmio + HOST_CTL); /* flush && sanity check */ if (tmp & HOST_AHCI_EN) return; msleep(10); } WARN_ON(1); } static ssize_t ahci_show_host_caps(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; return sprintf(buf, "%x\n", hpriv->cap); } static ssize_t ahci_show_host_cap2(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; return sprintf(buf, "%x\n", hpriv->cap2); } static ssize_t ahci_show_host_version(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; return sprintf(buf, "%x\n", readl(mmio + HOST_VERSION)); } static ssize_t ahci_show_port_cmd(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); void __iomem *port_mmio = ahci_port_base(ap); return sprintf(buf, "%x\n", readl(port_mmio + PORT_CMD)); } /** * ahci_save_initial_config - Save and fixup initial config values * @dev: target AHCI device * @hpriv: host private area to store config values * @force_port_map: force port map to a specified value * @mask_port_map: mask out particular bits from port map * * Some registers containing configuration info might be setup by * BIOS and might be cleared on reset. This function saves the * initial values of those registers into @hpriv such that they * can be restored after controller reset. * * If inconsistent, config values are fixed up by this function. * * LOCKING: * None. */ void ahci_save_initial_config(struct device *dev, struct ahci_host_priv *hpriv, unsigned int force_port_map, unsigned int mask_port_map) { void __iomem *mmio = hpriv->mmio; u32 cap, cap2, vers, port_map; int i; /* make sure AHCI mode is enabled before accessing CAP */ ahci_enable_ahci(mmio); /* Values prefixed with saved_ are written back to host after * reset. Values without are used for driver operation. */ hpriv->saved_cap = cap = readl(mmio + HOST_CAP); hpriv->saved_port_map = port_map = readl(mmio + HOST_PORTS_IMPL); /* CAP2 register is only defined for AHCI 1.2 and later */ vers = readl(mmio + HOST_VERSION); if ((vers >> 16) > 1 || ((vers >> 16) == 1 && (vers & 0xFFFF) >= 0x200)) hpriv->saved_cap2 = cap2 = readl(mmio + HOST_CAP2); else hpriv->saved_cap2 = cap2 = 0; /* 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"); 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"); 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"); 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"); 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"); cap &= ~HOST_CAP_SNTF; } 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); 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); port_map &= mask_port_map; } /* cross check port_map and cap.n_ports */ if (port_map) { int map_ports = 0; for (i = 0; i < AHCI_MAX_PORTS; i++) if (port_map & (1 << i)) map_ports++; /* If PI has more ports than n_ports, whine, clear * 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)); port_map = 0; } } /* 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); /* write the fixed up value to the PI register */ hpriv->saved_port_map = port_map; } /* record values to use during operation */ hpriv->cap = cap; hpriv->cap2 = cap2; hpriv->port_map = port_map; } EXPORT_SYMBOL_GPL(ahci_save_initial_config); /** * ahci_restore_initial_config - Restore initial config * @host: target ATA host * * Restore initial config stored by ahci_save_initial_config(). * * LOCKING: * None. */ static void ahci_restore_initial_config(struct ata_host *host) { struct ahci_host_priv *hpriv = host->private_data; void __iomem *mmio = hpriv->mmio; writel(hpriv->saved_cap, mmio + HOST_CAP); if (hpriv->saved_cap2) writel(hpriv->saved_cap2, mmio + HOST_CAP2); writel(hpriv->saved_port_map, mmio + HOST_PORTS_IMPL); (void) readl(mmio + HOST_PORTS_IMPL); /* flush */ } static unsigned ahci_scr_offset(struct ata_port *ap, unsigned int sc_reg) { static const int offset[] = { [SCR_STATUS] = PORT_SCR_STAT, [SCR_CONTROL] = PORT_SCR_CTL, [SCR_ERROR] = PORT_SCR_ERR, [SCR_ACTIVE] = PORT_SCR_ACT, [SCR_NOTIFICATION] = PORT_SCR_NTF, }; struct ahci_host_priv *hpriv = ap->host->private_data; if (sc_reg < ARRAY_SIZE(offset) && (sc_reg != SCR_NOTIFICATION || (hpriv->cap & HOST_CAP_SNTF))) return offset[sc_reg]; return 0; } static int ahci_scr_read(struct ata_link *link, unsigned int sc_reg, u32 *val) { void __iomem *port_mmio = ahci_port_base(link->ap); int offset = ahci_scr_offset(link->ap, sc_reg); if (offset) { *val = readl(port_mmio + offset); return 0; } return -EINVAL; } static int ahci_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val) { void __iomem *port_mmio = ahci_port_base(link->ap); int offset = ahci_scr_offset(link->ap, sc_reg); if (offset) { writel(val, port_mmio + offset); return 0; } return -EINVAL; } static int ahci_is_device_present(void __iomem *port_mmio) { u8 status = readl(port_mmio + PORT_TFDATA) & 0xff; /* Make sure PxTFD.STS.BSY and PxTFD.STS.DRQ are 0 */ if (status & (ATA_BUSY | ATA_DRQ)) return 0; /* Make sure PxSSTS.DET is 3h */ status = readl(port_mmio + PORT_SCR_STAT) & 0xf; if (status != 3) return 0; return 1; } void ahci_start_engine(struct ata_port *ap) { void __iomem *port_mmio = ahci_port_base(ap); u32 tmp; if (!ahci_is_device_present(port_mmio)) return; /* start DMA */ tmp = readl(port_mmio + PORT_CMD); tmp |= PORT_CMD_START; writel(tmp, port_mmio + PORT_CMD); readl(port_mmio + PORT_CMD); /* flush */ } EXPORT_SYMBOL_GPL(ahci_start_engine); int ahci_stop_engine(struct ata_port *ap) { void __iomem *port_mmio = ahci_port_base(ap); u32 tmp; tmp = readl(port_mmio + PORT_CMD); /* check if the HBA is idle */ if ((tmp & (PORT_CMD_START | PORT_CMD_LIST_ON)) == 0) return 0; /* setting HBA to idle */ tmp &= ~PORT_CMD_START; writel(tmp, port_mmio + PORT_CMD); /* wait for engine to stop. This could be as long as 500 msec */ tmp = ata_wait_register(port_mmio + PORT_CMD, PORT_CMD_LIST_ON, PORT_CMD_LIST_ON, 1, 500); if (tmp & PORT_CMD_LIST_ON) return -EIO; return 0; } EXPORT_SYMBOL_GPL(ahci_stop_engine); static 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; struct ahci_port_priv *pp = ap->private_data; u32 tmp; /* set FIS registers */ if (hpriv->cap & HOST_CAP_64) writel((pp->cmd_slot_dma >> 16) >> 16, port_mmio + PORT_LST_ADDR_HI); writel(pp->cmd_slot_dma & 0xffffffff, port_mmio + PORT_LST_ADDR); if (hpriv->cap & HOST_CAP_64) writel((pp->rx_fis_dma >> 16) >> 16, port_mmio + PORT_FIS_ADDR_HI); writel(pp->rx_fis_dma & 0xffffffff, port_mmio + PORT_FIS_ADDR); /* enable FIS reception */ tmp = readl(port_mmio + PORT_CMD); tmp |= PORT_CMD_FIS_RX; writel(tmp, port_mmio + PORT_CMD); /* flush */ readl(port_mmio + PORT_CMD); } static int ahci_stop_fis_rx(struct ata_port *ap) { void __iomem *port_mmio = ahci_port_base(ap); u32 tmp; /* disable FIS reception */ tmp = readl(port_mmio + PORT_CMD); tmp &= ~PORT_CMD_FIS_RX; writel(tmp, port_mmio + PORT_CMD); /* wait for completion, spec says 500ms, give it 1000 */ tmp = ata_wait_register(port_mmio + PORT_CMD, PORT_CMD_FIS_ON, PORT_CMD_FIS_ON, 10, 1000); if (tmp & PORT_CMD_FIS_ON) return -EBUSY; return 0; } static void ahci_power_up(struct ata_port *ap) { struct ahci_host_priv *hpriv = ap->host->private_data; void __iomem *port_mmio = ahci_port_base(ap); u32 cmd; cmd = readl(port_mmio + PORT_CMD) & ~PORT_CMD_ICC_MASK; /* spin up device */ if (hpriv->cap & HOST_CAP_SSS) { cmd |= PORT_CMD_SPIN_UP; writel(cmd, port_mmio + PORT_CMD); } /* wake up link */ writel(cmd | PORT_CMD_ICC_ACTIVE, port_mmio + PORT_CMD); } static void ahci_disable_alpm(struct ata_port *ap) { struct ahci_host_priv *hpriv = ap->host->private_data; void __iomem *port_mmio = ahci_port_base(ap); u32 cmd; struct ahci_port_priv *pp = ap->private_data; /* IPM bits should be disabled by libata-core */ /* get the existing command bits */ cmd = readl(port_mmio + PORT_CMD); /* disable ALPM and ASP */ cmd &= ~PORT_CMD_ASP; cmd &= ~PORT_CMD_ALPE; /* force the interface back to active */ cmd |= PORT_CMD_ICC_ACTIVE; /* write out new cmd value */ writel(cmd, port_mmio + PORT_CMD); cmd = readl(port_mmio + PORT_CMD); /* wait 10ms to be sure we've come out of any low power state */ msleep(10); /* clear out any PhyRdy stuff from interrupt status */ writel(PORT_IRQ_PHYRDY, port_mmio + PORT_IRQ_STAT); /* go ahead and clean out PhyRdy Change from Serror too */ ahci_scr_write(&ap->link, SCR_ERROR, ((1 << 16) | (1 << 18))); /* * Clear flag to indicate that we should ignore all PhyRdy * state changes */ hpriv->flags &= ~AHCI_HFLAG_NO_HOTPLUG; /* * Enable interrupts on Phy Ready. */ pp->intr_mask |= PORT_IRQ_PHYRDY; writel(pp->intr_mask, port_mmio + PORT_IRQ_MASK); /* * don't change the link pm policy - we can be called * just to turn of link pm temporarily */ } static int ahci_enable_alpm(struct ata_port *ap, enum link_pm policy) { struct ahci_host_priv *hpriv = ap->host->private_data; void __iomem *port_mmio = ahci_port_base(ap); u32 cmd; struct ahci_port_priv *pp = ap->private_data; u32 asp; /* Make sure the host is capable of link power management */ if (!(hpriv->cap & HOST_CAP_ALPM)) return -EINVAL; switch (policy) { case MAX_PERFORMANCE: case NOT_AVAILABLE: /* * if we came here with NOT_AVAILABLE, * 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: /* configure HBA to enter SLUMBER */ asp = PORT_CMD_ASP; break; case MEDIUM_POWER: /* configure HBA to enter PARTIAL */ asp = 0; break; default: return -EINVAL; } /* * Disable interrupts on Phy Ready. This keeps us from * getting woken up due to spurious phy ready interrupts * TBD - Hot plug should be done via polling now, is * that even supported? */ pp->intr_mask &= ~PORT_IRQ_PHYRDY; writel(pp->intr_mask, port_mmio + PORT_IRQ_MASK); /* * Set a flag to indicate that we should ignore all PhyRdy * state changes since these can happen now whenever we * change link state */ hpriv->flags |= AHCI_HFLAG_NO_HOTPLUG; /* get the existing command bits */ cmd = readl(port_mmio + PORT_CMD); /* * Set ASP based on Policy */ cmd |= asp; /* * Setting this bit will instruct the HBA to aggressively * enter a lower power link state when it's appropriate and * based on the value set above for ASP */ cmd |= PORT_CMD_ALPE; /* write out new cmd value */ writel(cmd, port_mmio + PORT_CMD); cmd = readl(port_mmio + PORT_CMD); /* IPM bits should be set by libata-core */ return 0; } #ifdef CONFIG_PM static void ahci_power_down(struct ata_port *ap) { struct ahci_host_priv *hpriv = ap->host->private_data; void __iomem *port_mmio = ahci_port_base(ap); u32 cmd, scontrol; if (!(hpriv->cap & HOST_CAP_SSS)) return; /* put device into listen mode, first set PxSCTL.DET to 0 */ scontrol = readl(port_mmio + PORT_SCR_CTL); scontrol &= ~0xf; writel(scontrol, port_mmio + PORT_SCR_CTL); /* then set PxCMD.SUD to 0 */ cmd = readl(port_mmio + PORT_CMD) & ~PORT_CMD_ICC_MASK; cmd &= ~PORT_CMD_SPIN_UP; writel(cmd, port_mmio + PORT_CMD); } #endif static void ahci_start_port(struct ata_port *ap) { struct ahci_port_priv *pp = ap->private_data; struct ata_link *link; struct ahci_em_priv *emp; ssize_t rc; int i; /* enable FIS reception */ ahci_start_fis_rx(ap); /* enable DMA */ ahci_start_engine(ap); /* turn on LEDs */ if (ap->flags & ATA_FLAG_EM) { ata_for_each_link(link, ap, EDGE) { emp = &pp->em_priv[link->pmp]; /* EM Transmit bit maybe busy during init */ for (i = 0; i < EM_MAX_RETRY; i++) { rc = ahci_transmit_led_message(ap, emp->led_state, 4); if (rc == -EBUSY) msleep(1); else break; } } } if (ap->flags & ATA_FLAG_SW_ACTIVITY) ata_for_each_link(link, ap, EDGE) ahci_init_sw_activity(link); } static int ahci_deinit_port(struct ata_port *ap, const char **emsg) { int rc; /* disable DMA */ rc = ahci_stop_engine(ap); if (rc) { *emsg = "failed to stop engine"; return rc; } /* disable FIS reception */ rc = ahci_stop_fis_rx(ap); if (rc) { *emsg = "failed stop FIS RX"; return rc; } return 0; } int ahci_reset_controller(struct ata_host *host) { struct ahci_host_priv *hpriv = host->private_data; void __iomem *mmio = hpriv->mmio; u32 tmp; /* we must be in AHCI mode, before using anything * AHCI-specific, such as HOST_RESET. */ ahci_enable_ahci(mmio); /* global controller reset */ if (!ahci_skip_host_reset) { tmp = readl(mmio + HOST_CTL); if ((tmp & HOST_RESET) == 0) { writel(tmp | HOST_RESET, mmio + HOST_CTL); readl(mmio + HOST_CTL); /* flush */ } /* * to perform host reset, OS should set HOST_RESET * and poll until this bit is read to be "0". * reset must complete within 1 second, or * the hardware should be considered fried. */ tmp = ata_wait_register(mmio + HOST_CTL, HOST_RESET, HOST_RESET, 10, 1000); if (tmp & HOST_RESET) { dev_printk(KERN_ERR, host->dev, "controller reset failed (0x%x)\n", tmp); return -EIO; } /* turn on AHCI mode */ ahci_enable_ahci(mmio); /* Some registers might be cleared on reset. Restore * initial values. */ ahci_restore_initial_config(host); } else dev_printk(KERN_INFO, host->dev, "skipping global host reset\n"); return 0; } EXPORT_SYMBOL_GPL(ahci_reset_controller); static void ahci_sw_activity(struct ata_link *link) { struct ata_port *ap = link->ap; struct ahci_port_priv *pp = ap->private_data; struct ahci_em_priv *emp = &pp->em_priv[link->pmp]; if (!(link->flags & ATA_LFLAG_SW_ACTIVITY)) return; emp->activity++; if (!timer_pending(&emp->timer)) mod_timer(&emp->timer, jiffies + msecs_to_jiffies(10)); } static void ahci_sw_activity_blink(unsigned long arg) { struct ata_link *link = (struct ata_link *)arg; struct ata_port *ap = link->ap; struct ahci_port_priv *pp = ap->private_data; struct ahci_em_priv *emp = &pp->em_priv[link->pmp]; unsigned long led_message = emp->led_state; u32 activity_led_state; unsigned long flags; led_message &= EM_MSG_LED_VALUE; led_message |= ap->port_no | (link->pmp << 8); /* check to see if we've had activity. If so, * toggle state of LED and reset timer. If not, * turn LED to desired idle state. */ spin_lock_irqsave(ap->lock, flags); if (emp->saved_activity != emp->activity) { emp->saved_activity = emp->activity; /* get the current LED state */ activity_led_state = led_message & EM_MSG_LED_VALUE_ON; if (activity_led_state) activity_led_state = 0; else activity_led_state = 1; /* clear old state */ led_message &= ~EM_MSG_LED_VALUE_ACTIVITY; /* toggle state */ led_message |= (activity_led_state << 16); mod_timer(&emp->timer, jiffies + msecs_to_jiffies(100)); } else { /* switch to idle */ led_message &= ~EM_MSG_LED_VALUE_ACTIVITY; if (emp->blink_policy == BLINK_OFF) led_message |= (1 << 16); } spin_unlock_irqrestore(ap->lock, flags); ahci_transmit_led_message(ap, led_message, 4); } static void ahci_init_sw_activity(struct ata_link *link) { struct ata_port *ap = link->ap; struct ahci_port_priv *pp = ap->private_data; struct ahci_em_priv *emp = &pp->em_priv[link->pmp]; /* init activity stats, setup timer */ emp->saved_activity = emp->activity = 0; setup_timer(&emp->timer, ahci_sw_activity_blink, (unsigned long)link); /* check our blink policy and set flag for link if it's enabled */ if (emp->blink_policy) link->flags |= ATA_LFLAG_SW_ACTIVITY; } int ahci_reset_em(struct ata_host *host) { struct ahci_host_priv *hpriv = host->private_data; void __iomem *mmio = hpriv->mmio; u32 em_ctl; em_ctl = readl(mmio + HOST_EM_CTL); if ((em_ctl & EM_CTL_TM) || (em_ctl & EM_CTL_RST)) return -EINVAL; writel(em_ctl | EM_CTL_RST, mmio + HOST_EM_CTL); return 0; } EXPORT_SYMBOL_GPL(ahci_reset_em); static ssize_t ahci_transmit_led_message(struct ata_port *ap, u32 state, ssize_t size) { struct ahci_host_priv *hpriv = ap->host->private_data; struct ahci_port_priv *pp = ap->private_data; void __iomem *mmio = hpriv->mmio; u32 em_ctl; u32 message[] = {0, 0}; unsigned long flags; int pmp; struct ahci_em_priv *emp; /* get the slot number from the message */ pmp = (state & EM_MSG_LED_PMP_SLOT) >> 8; if (pmp < EM_MAX_SLOTS) emp = &pp->em_priv[pmp]; else return -EINVAL; spin_lock_irqsave(ap->lock, flags); /* * if we are still busy transmitting a previous message, * do not allow */ em_ctl = readl(mmio + HOST_EM_CTL); if (em_ctl & EM_CTL_TM) { spin_unlock_irqrestore(ap->lock, flags); return -EBUSY; } /* * create message header - this is all zero except for * the message size, which is 4 bytes. */ message[0] |= (4 << 8); /* ignore 0:4 of byte zero, fill in port info yourself */ message[1] = ((state & ~EM_MSG_LED_HBA_PORT) | ap->port_no); /* write message to EM_LOC */ writel(message[0], mmio + hpriv->em_loc); writel(message[1], mmio + hpriv->em_loc+4); /* save off new led state for port/slot */ emp->led_state = state; /* * tell hardware to transmit the message */ writel(em_ctl | EM_CTL_TM, mmio + HOST_EM_CTL); spin_unlock_irqrestore(ap->lock, flags); return size; } static ssize_t ahci_led_show(struct ata_port *ap, char *buf) { struct ahci_port_priv *pp = ap->private_data; struct ata_link *link; struct ahci_em_priv *emp; int rc = 0; ata_for_each_link(link, ap, EDGE) { emp = &pp->em_priv[link->pmp]; rc += sprintf(buf, "%lx\n", emp->led_state); } return rc; } static ssize_t ahci_led_store(struct ata_port *ap, const char *buf, size_t size) { int state; int pmp; struct ahci_port_priv *pp = ap->private_data; struct ahci_em_priv *emp; state = simple_strtoul(buf, NULL, 0); /* get the slot number from the message */ pmp = (state & EM_MSG_LED_PMP_SLOT) >> 8; if (pmp < EM_MAX_SLOTS) emp = &pp->em_priv[pmp]; else return -EINVAL; /* mask off the activity bits if we are in sw_activity * mode, user should turn off sw_activity before setting * activity led through em_message */ if (emp->blink_policy) state &= ~EM_MSG_LED_VALUE_ACTIVITY; return ahci_transmit_led_message(ap, state, size); } static ssize_t ahci_activity_store(struct ata_device *dev, enum sw_activity val) { struct ata_link *link = dev->link; struct ata_port *ap = link->ap; struct ahci_port_priv *pp = ap->private_data; struct ahci_em_priv *emp = &pp->em_priv[link->pmp]; u32 port_led_state = emp->led_state; /* save the desired Activity LED behavior */ if (val == OFF) { /* clear LFLAG */ link->flags &= ~(ATA_LFLAG_SW_ACTIVITY); /* 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); } else { link->flags |= ATA_LFLAG_SW_ACTIVITY; if (val == BLINK_OFF) { /* set LED to ON for idle */ 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); } } emp->blink_policy = val; return 0; } static ssize_t ahci_activity_show(struct ata_device *dev, char *buf) { struct ata_link *link = dev->link; struct ata_port *ap = link->ap; struct ahci_port_priv *pp = ap->private_data; struct ahci_em_priv *emp = &pp->em_priv[link->pmp]; /* display the saved value of activity behavior for this * disk. */ return sprintf(buf, "%d\n", emp->blink_policy); } static void ahci_port_init(struct device *dev, struct ata_port *ap, int port_no, void __iomem *mmio, void __iomem *port_mmio) { const char *emsg = NULL; int rc; u32 tmp; /* make sure port is not active */ rc = ahci_deinit_port(ap, &emsg); if (rc) dev_warn(dev, "%s (%d)\n", emsg, rc); /* clear SError */ tmp = readl(port_mmio + PORT_SCR_ERR); VPRINTK("PORT_SCR_ERR 0x%x\n", tmp); writel(tmp, port_mmio + PORT_SCR_ERR); /* clear port IRQ */ tmp = readl(port_mmio + PORT_IRQ_STAT); VPRINTK("PORT_IRQ_STAT 0x%x\n", tmp); if (tmp) writel(tmp, port_mmio + PORT_IRQ_STAT); writel(1 << port_no, mmio + HOST_IRQ_STAT); } void ahci_init_controller(struct ata_host *host) { struct ahci_host_priv *hpriv = host->private_data; void __iomem *mmio = hpriv->mmio; int i; void __iomem *port_mmio; u32 tmp; for (i = 0; i < host->n_ports; i++) { struct ata_port *ap = host->ports[i]; port_mmio = ahci_port_base(ap); if (ata_port_is_dummy(ap)) continue; ahci_port_init(host->dev, ap, i, mmio, port_mmio); } tmp = readl(mmio + HOST_CTL); VPRINTK("HOST_CTL 0x%x\n", tmp); writel(tmp | HOST_IRQ_EN, mmio + HOST_CTL); tmp = readl(mmio + HOST_CTL); VPRINTK("HOST_CTL 0x%x\n", tmp); } EXPORT_SYMBOL_GPL(ahci_init_controller); static void ahci_dev_config(struct ata_device *dev) { struct ahci_host_priv *hpriv = dev->link->ap->host->private_data; 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"); } } static unsigned int ahci_dev_classify(struct ata_port *ap) { void __iomem *port_mmio = ahci_port_base(ap); struct ata_taskfile tf; u32 tmp; tmp = readl(port_mmio + PORT_SIG); tf.lbah = (tmp >> 24) & 0xff; tf.lbam = (tmp >> 16) & 0xff; tf.lbal = (tmp >> 8) & 0xff; tf.nsect = (tmp) & 0xff; return ata_dev_classify(&tf); } static void ahci_fill_cmd_slot(struct ahci_port_priv *pp, unsigned int tag, u32 opts) { dma_addr_t cmd_tbl_dma; cmd_tbl_dma = pp->cmd_tbl_dma + tag * AHCI_CMD_TBL_SZ; pp->cmd_slot[tag].opts = cpu_to_le32(opts); pp->cmd_slot[tag].status = 0; pp->cmd_slot[tag].tbl_addr = cpu_to_le32(cmd_tbl_dma & 0xffffffff); pp->cmd_slot[tag].tbl_addr_hi = cpu_to_le32((cmd_tbl_dma >> 16) >> 16); } int ahci_kick_engine(struct ata_port *ap) { void __iomem *port_mmio = ahci_port_base(ap); struct ahci_host_priv *hpriv = ap->host->private_data; u8 status = readl(port_mmio + PORT_TFDATA) & 0xFF; u32 tmp; int busy, rc; /* stop engine */ rc = ahci_stop_engine(ap); if (rc) goto out_restart; /* need to do CLO? * always do CLO if PMP is attached (AHCI-1.3 9.2) */ busy = status & (ATA_BUSY | ATA_DRQ); if (!busy && !sata_pmp_attached(ap)) { rc = 0; goto out_restart; } if (!(hpriv->cap & HOST_CAP_CLO)) { rc = -EOPNOTSUPP; goto out_restart; } /* perform CLO */ tmp = readl(port_mmio + PORT_CMD); tmp |= PORT_CMD_CLO; writel(tmp, port_mmio + PORT_CMD); rc = 0; tmp = ata_wait_register(port_mmio + PORT_CMD, PORT_CMD_CLO, PORT_CMD_CLO, 1, 500); if (tmp & PORT_CMD_CLO) rc = -EIO; /* restart engine */ out_restart: ahci_start_engine(ap); return rc; } EXPORT_SYMBOL_GPL(ahci_kick_engine); static int ahci_exec_polled_cmd(struct ata_port *ap, int pmp, struct ata_taskfile *tf, int is_cmd, u16 flags, unsigned long timeout_msec) { const u32 cmd_fis_len = 5; /* five dwords */ struct ahci_port_priv *pp = ap->private_data; void __iomem *port_mmio = ahci_port_base(ap); u8 *fis = pp->cmd_tbl; u32 tmp; /* prep the command */ ata_tf_to_fis(tf, pmp, is_cmd, fis); ahci_fill_cmd_slot(pp, 0, cmd_fis_len | flags | (pmp << 12)); /* issue & wait */ writel(1, port_mmio + PORT_CMD_ISSUE); if (timeout_msec) { tmp = ata_wait_register(port_mmio + PORT_CMD_ISSUE, 0x1, 0x1, 1, timeout_msec); if (tmp & 0x1) { ahci_kick_engine(ap); return -EBUSY; } } else readl(port_mmio + PORT_CMD_ISSUE); /* flush */ return 0; } int ahci_do_softreset(struct ata_link *link, unsigned int *class, int pmp, unsigned long deadline, int (*check_ready)(struct ata_link *link)) { struct ata_port *ap = link->ap; struct ahci_host_priv *hpriv = ap->host->private_data; const char *reason = NULL; unsigned long now, msecs; struct ata_taskfile tf; int rc; DPRINTK("ENTER\n"); /* 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_tf_init(link->device, &tf); /* issue the first D2H Register FIS */ msecs = 0; now = jiffies; if (time_after(now, deadline)) msecs = jiffies_to_msecs(deadline - now); tf.ctl |= ATA_SRST; if (ahci_exec_polled_cmd(ap, pmp, &tf, 0, AHCI_CMD_RESET | AHCI_CMD_CLR_BUSY, msecs)) { rc = -EIO; reason = "1st FIS failed"; goto fail; } /* spec says at least 5us, but be generous and sleep for 1ms */ msleep(1); /* issue the second D2H Register FIS */ tf.ctl &= ~ATA_SRST; ahci_exec_polled_cmd(ap, pmp, &tf, 0, 0, 0); /* wait for link to become ready */ rc = ata_wait_after_reset(link, deadline, check_ready); if (rc == -EBUSY && hpriv->flags & AHCI_HFLAG_SRST_TOUT_IS_OFFLINE) { /* * Workaround for cases where link online status can't * be trusted. Treat device readiness timeout as link * offline. */ ata_link_printk(link, KERN_INFO, "device not ready, treating as offline\n"); *class = ATA_DEV_NONE; } else if (rc) { /* link occupied, -ENODEV too is an error */ reason = "device not ready"; goto fail; } else *class = ahci_dev_classify(ap); DPRINTK("EXIT, class=%u\n", *class); return 0; fail: ata_link_printk(link, KERN_ERR, "softreset failed (%s)\n", reason); return rc; } int ahci_check_ready(struct ata_link *link) { void __iomem *port_mmio = ahci_port_base(link->ap); u8 status = readl(port_mmio + PORT_TFDATA) & 0xFF; return ata_check_ready(status); } EXPORT_SYMBOL_GPL(ahci_check_ready); static int ahci_softreset(struct ata_link *link, unsigned int *class, unsigned long deadline) { int pmp = sata_srst_pmp(link); DPRINTK("ENTER\n"); return ahci_do_softreset(link, class, pmp, deadline, ahci_check_ready); } EXPORT_SYMBOL_GPL(ahci_do_softreset); 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"); ahci_stop_engine(ap); /* clear D2H reception area to properly wait for D2H FIS */ ata_tf_init(link->device, &tf); tf.command = 0x80; ata_tf_to_fis(&tf, 0, 0, d2h_fis); rc = sata_link_hardreset(link, timing, deadline, &online, ahci_check_ready); ahci_start_engine(ap); if (online) *class = ahci_dev_classify(ap); DPRINTK("EXIT, rc=%d, class=%u\n", rc, *class); return rc; } static void ahci_postreset(struct ata_link *link, unsigned int *class) { struct ata_port *ap = link->ap; void __iomem *port_mmio = ahci_port_base(ap); u32 new_tmp, tmp; ata_std_postreset(link, class); /* Make sure port's ATAPI bit is set appropriately */ new_tmp = tmp = readl(port_mmio + PORT_CMD); if (*class == ATA_DEV_ATAPI) new_tmp |= PORT_CMD_ATAPI; else new_tmp &= ~PORT_CMD_ATAPI; if (new_tmp != tmp) { writel(new_tmp, port_mmio + PORT_CMD); readl(port_mmio + PORT_CMD); /* flush */ } } static unsigned int ahci_fill_sg(struct ata_queued_cmd *qc, void *cmd_tbl) { struct scatterlist *sg; struct ahci_sg *ahci_sg = cmd_tbl + AHCI_CMD_TBL_HDR_SZ; unsigned int si; VPRINTK("ENTER\n"); /* * Next, the S/G list. */ for_each_sg(qc->sg, sg, qc->n_elem, si) { dma_addr_t addr = sg_dma_address(sg); u32 sg_len = sg_dma_len(sg); ahci_sg[si].addr = cpu_to_le32(addr & 0xffffffff); ahci_sg[si].addr_hi = cpu_to_le32((addr >> 16) >> 16); ahci_sg[si].flags_size = cpu_to_le32(sg_len - 1); } return si; } static int ahci_pmp_qc_defer(struct ata_queued_cmd *qc) { struct ata_port *ap = qc->ap; struct ahci_port_priv *pp = ap->private_data; if (!sata_pmp_attached(ap) || pp->fbs_enabled) return ata_std_qc_defer(qc); else return sata_pmp_qc_defer_cmd_switch(qc); } static void ahci_qc_prep(struct ata_queued_cmd *qc) { struct ata_port *ap = qc->ap; struct ahci_port_priv *pp = ap->private_data; int is_atapi = ata_is_atapi(qc->tf.protocol); void *cmd_tbl; u32 opts; const u32 cmd_fis_len = 5; /* five dwords */ unsigned int n_elem; /* * Fill in command table information. First, the header, * a SATA Register - Host to Device command FIS. */ cmd_tbl = pp->cmd_tbl + qc->tag * AHCI_CMD_TBL_SZ; ata_tf_to_fis(&qc->tf, qc->dev->link->pmp, 1, cmd_tbl); if (is_atapi) { memset(cmd_tbl + AHCI_CMD_TBL_CDB, 0, 32); memcpy(cmd_tbl + AHCI_CMD_TBL_CDB, qc->cdb, qc->dev->cdb_len); } n_elem = 0; if (qc->flags & ATA_QCFLAG_DMAMAP) n_elem = ahci_fill_sg(qc, cmd_tbl); /* * Fill in command slot information. */ opts = cmd_fis_len | n_elem << 16 | (qc->dev->link->pmp << 12); if (qc->tf.flags & ATA_TFLAG_WRITE) opts |= AHCI_CMD_WRITE; if (is_atapi) opts |= AHCI_CMD_ATAPI | AHCI_CMD_PREFETCH; ahci_fill_cmd_slot(pp, qc->tag, opts); } static void ahci_fbs_dec_intr(struct ata_port *ap) { struct ahci_port_priv *pp = ap->private_data; void __iomem *port_mmio = ahci_port_base(ap); u32 fbs = readl(port_mmio + PORT_FBS); int retries = 3; DPRINTK("ENTER\n"); BUG_ON(!pp->fbs_enabled); /* time to wait for DEC is not specified by AHCI spec, * add a retry loop for safety. */ writel(fbs | PORT_FBS_DEC, port_mmio + PORT_FBS); fbs = readl(port_mmio + PORT_FBS); while ((fbs & PORT_FBS_DEC) && retries--) { udelay(1); fbs = readl(port_mmio + PORT_FBS); } if (fbs & PORT_FBS_DEC) dev_printk(KERN_ERR, ap->host->dev, "failed to clear device error\n"); } static void ahci_error_intr(struct ata_port *ap, u32 irq_stat) { struct ahci_host_priv *hpriv = ap->host->private_data; struct ahci_port_priv *pp = ap->private_data; struct ata_eh_info *host_ehi = &ap->link.eh_info; struct ata_link *link = NULL; struct ata_queued_cmd *active_qc; struct ata_eh_info *active_ehi; bool fbs_need_dec = false; u32 serror; /* determine active link with error */ if (pp->fbs_enabled) { void __iomem *port_mmio = ahci_port_base(ap); 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])) { link = &ap->pmp_link[pmp]; fbs_need_dec = true; } } else ata_for_each_link(link, ap, EDGE) if (ata_link_active(link)) break; if (!link) link = &ap->link; active_qc = ata_qc_from_tag(ap, link->active_tag); active_ehi = &link->eh_info; /* record irq stat */ ata_ehi_clear_desc(host_ehi); ata_ehi_push_desc(host_ehi, "irq_stat 0x%08x", irq_stat); /* AHCI needs SError cleared; otherwise, it might lock up */ ahci_scr_read(&ap->link, SCR_ERROR, &serror); ahci_scr_write(&ap->link, SCR_ERROR, serror); host_ehi->serror |= serror; /* some controllers set IRQ_IF_ERR on device errors, ignore it */ if (hpriv->flags & AHCI_HFLAG_IGN_IRQ_IF_ERR) irq_stat &= ~PORT_IRQ_IF_ERR; if (irq_stat & PORT_IRQ_TF_ERR) { /* If qc is active, charge it; otherwise, the active * link. There's no active qc on NCQ errors. It will * be determined by EH by reading log page 10h. */ if (active_qc) active_qc->err_mask |= AC_ERR_DEV; else active_ehi->err_mask |= AC_ERR_DEV; if (hpriv->flags & AHCI_HFLAG_IGN_SERR_INTERNAL) host_ehi->serror &= ~SERR_INTERNAL; } if (irq_stat & PORT_IRQ_UNK_FIS) { u32 *unk = (u32 *)(pp->rx_fis + RX_FIS_UNK); active_ehi->err_mask |= AC_ERR_HSM; active_ehi->action |= ATA_EH_RESET; ata_ehi_push_desc(active_ehi, "unknown FIS %08x %08x %08x %08x" , unk[0], unk[1], unk[2], unk[3]); } if (sata_pmp_attached(ap) && (irq_stat & PORT_IRQ_BAD_PMP)) { active_ehi->err_mask |= AC_ERR_HSM; active_ehi->action |= ATA_EH_RESET; ata_ehi_push_desc(active_ehi, "incorrect PMP"); } if (irq_stat & (PORT_IRQ_HBUS_ERR | PORT_IRQ_HBUS_DATA_ERR)) { host_ehi->err_mask |= AC_ERR_HOST_BUS; host_ehi->action |= ATA_EH_RESET; ata_ehi_push_desc(host_ehi, "host bus error"); } if (irq_stat & PORT_IRQ_IF_ERR) { if (fbs_need_dec) active_ehi->err_mask |= AC_ERR_DEV; else { host_ehi->err_mask |= AC_ERR_ATA_BUS; host_ehi->action |= ATA_EH_RESET; } ata_ehi_push_desc(host_ehi, "interface fatal error"); } if (irq_stat & (PORT_IRQ_CONNECT | PORT_IRQ_PHYRDY)) { ata_ehi_hotplugged(host_ehi); ata_ehi_push_desc(host_ehi, "%s", irq_stat & PORT_IRQ_CONNECT ? "connection status changed" : "PHY RDY changed"); } /* okay, let's hand over to EH */ if (irq_stat & PORT_IRQ_FREEZE) ata_port_freeze(ap); else if (fbs_need_dec) { ata_link_abort(link); ahci_fbs_dec_intr(ap); } else ata_port_abort(ap); } static void ahci_port_intr(struct ata_port *ap) { 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; 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; /* If we are getting PhyRdy, this is * just a power state change, we should * clear out this, plus the PhyRdy/Comm * Wake bits from Serror */ if ((hpriv->flags & AHCI_HFLAG_NO_HOTPLUG) && (status & PORT_IRQ_PHYRDY)) { status &= ~PORT_IRQ_PHYRDY; ahci_scr_write(&ap->link, SCR_ERROR, ((1 << 16) | (1 << 18))); } if (unlikely(status & PORT_IRQ_ERROR)) { ahci_error_intr(ap, status); return; } if (status & PORT_IRQ_SDB_FIS) { /* If SNotification is available, leave notification * handling to sata_async_notification(). If not, * emulate it by snooping SDB FIS RX area. * * Snooping FIS RX area is probably cheaper than * poking SNotification but some constrollers which * implement SNotification, ICH9 for example, don't * store AN SDB FIS into receive area. */ if (hpriv->cap & HOST_CAP_SNTF) sata_async_notification(ap); else { /* If the 'N' bit in word 0 of the FIS is set, * we just received asynchronous notification. * Tell libata about it. * * Lack of SNotification should not appear in * ahci 1.2, so the workaround is unnecessary * when FBS is enabled. */ if (pp->fbs_enabled) WARN_ON_ONCE(1); else { const __le32 *f = pp->rx_fis + RX_FIS_SDB; u32 f0 = le32_to_cpu(f[0]); if (f0 & (1 << 15)) sata_async_notification(ap); } } } /* pp->active_link is not reliable once FBS is enabled, both * PORT_SCR_ACT and PORT_CMD_ISSUE should be checked because * NCQ and non-NCQ commands may be in flight at the same time. */ if (pp->fbs_enabled) { if (ap->qc_active) { qc_active = readl(port_mmio + PORT_SCR_ACT); qc_active |= readl(port_mmio + PORT_CMD_ISSUE); } } else { /* pp->active_link is valid iff any command is in flight */ if (ap->qc_active && pp->active_link->sactive) qc_active = readl(port_mmio + PORT_SCR_ACT); else qc_active = readl(port_mmio + PORT_CMD_ISSUE); } rc = ata_qc_complete_multiple(ap, qc_active); /* while resetting, invalid completions are expected */ if (unlikely(rc < 0 && !resetting)) { ehi->err_mask |= AC_ERR_HSM; ehi->action |= ATA_EH_RESET; ata_port_freeze(ap); } } irqreturn_t ahci_interrupt(int irq, void *dev_instance) { struct ata_host *host = dev_instance; struct ahci_host_priv *hpriv; unsigned int i, handled = 0; void __iomem *mmio; u32 irq_stat, irq_masked; VPRINTK("ENTER\n"); hpriv = host->private_data; mmio = hpriv->mmio; /* sigh. 0xffffffff is a valid return from h/w */ irq_stat = readl(mmio + HOST_IRQ_STAT); if (!irq_stat) return IRQ_NONE; irq_masked = irq_stat & hpriv->port_map; spin_lock(&host->lock); 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_port_intr(ap); VPRINTK("port %u\n", i); } else { VPRINTK("port %u (no irq)\n", i); if (ata_ratelimit()) dev_printk(KERN_WARNING, host->dev, "interrupt on disabled port %u\n", i); } handled = 1; } /* HOST_IRQ_STAT behaves as level triggered latch meaning that * it should be cleared after all the port events are cleared; * otherwise, it will raise a spurious interrupt after each * valid one. Please read section 10.6.2 of ahci 1.1 for more * information. * * Also, use the unmasked value to clear interrupt as spurious * pending event on a dummy port might cause screaming IRQ. */ writel(irq_stat, mmio + HOST_IRQ_STAT); spin_unlock(&host->lock); VPRINTK("EXIT\n"); return IRQ_RETVAL(handled); } EXPORT_SYMBOL_GPL(ahci_interrupt); static unsigned int ahci_qc_issue(struct ata_queued_cmd *qc) { struct ata_port *ap = qc->ap; void __iomem *port_mmio = ahci_port_base(ap); struct ahci_port_priv *pp = ap->private_data; /* Keep track of the currently active link. It will be used * in completion path to determine whether NCQ phase is in * progress. */ pp->active_link = qc->dev->link; if (qc->tf.protocol == ATA_PROT_NCQ) writel(1 << qc->tag, port_mmio + PORT_SCR_ACT); if (pp->fbs_enabled && pp->fbs_last_dev != qc->dev->link->pmp) { u32 fbs = readl(port_mmio + PORT_FBS); fbs &= ~(PORT_FBS_DEV_MASK | PORT_FBS_DEC); fbs |= qc->dev->link->pmp << PORT_FBS_DEV_OFFSET; writel(fbs, port_mmio + PORT_FBS); pp->fbs_last_dev = qc->dev->link->pmp; } writel(1 << qc->tag, port_mmio + PORT_CMD_ISSUE); ahci_sw_activity(qc->dev->link); return 0; } static bool ahci_qc_fill_rtf(struct ata_queued_cmd *qc) { struct ahci_port_priv *pp = qc->ap->private_data; u8 *d2h_fis = pp->rx_fis + RX_FIS_D2H_REG; if (pp->fbs_enabled) d2h_fis += qc->dev->link->pmp * AHCI_RX_FIS_SZ; ata_tf_from_fis(d2h_fis, &qc->result_tf); return true; } static void ahci_freeze(struct ata_port *ap) { void __iomem *port_mmio = ahci_port_base(ap); /* turn IRQ off */ writel(0, port_mmio + PORT_IRQ_MASK); } static void ahci_thaw(struct ata_port *ap) { struct ahci_host_priv *hpriv = ap->host->private_data; void __iomem *mmio = hpriv->mmio; void __iomem *port_mmio = ahci_port_base(ap); u32 tmp; struct ahci_port_priv *pp = ap->private_data; /* clear IRQ */ tmp = readl(port_mmio + PORT_IRQ_STAT); writel(tmp, port_mmio + PORT_IRQ_STAT); writel(1 << ap->port_no, mmio + HOST_IRQ_STAT); /* turn IRQ back on */ writel(pp->intr_mask, port_mmio + PORT_IRQ_MASK); } static void ahci_error_handler(struct ata_port *ap) { if (!(ap->pflags & ATA_PFLAG_FROZEN)) { /* restart engine */ ahci_stop_engine(ap); ahci_start_engine(ap); } sata_pmp_error_handler(ap); } static void ahci_post_internal_cmd(struct ata_queued_cmd *qc) { struct ata_port *ap = qc->ap; /* make DMA engine forget about the failed command */ if (qc->flags & ATA_QCFLAG_FAILED) ahci_kick_engine(ap); } static void ahci_enable_fbs(struct ata_port *ap) { struct ahci_port_priv *pp = ap->private_data; void __iomem *port_mmio = ahci_port_base(ap); u32 fbs; int rc; if (!pp->fbs_supported) return; fbs = readl(port_mmio + PORT_FBS); if (fbs & PORT_FBS_EN) { pp->fbs_enabled = true; pp->fbs_last_dev = -1; /* initialization */ return; } rc = ahci_stop_engine(ap); if (rc) return; 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"); pp->fbs_enabled = true; pp->fbs_last_dev = -1; /* initialization */ } else dev_printk(KERN_ERR, ap->host->dev, "Failed to enable FBS\n"); ahci_start_engine(ap); } static void ahci_disable_fbs(struct ata_port *ap) { struct ahci_port_priv *pp = ap->private_data; void __iomem *port_mmio = ahci_port_base(ap); u32 fbs; int rc; if (!pp->fbs_supported) return; fbs = readl(port_mmio + PORT_FBS); if ((fbs & PORT_FBS_EN) == 0) { pp->fbs_enabled = false; return; } rc = ahci_stop_engine(ap); if (rc) return; 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"); else { dev_printk(KERN_INFO, ap->host->dev, "FBS is disabled.\n"); pp->fbs_enabled = false; } ahci_start_engine(ap); } static void ahci_pmp_attach(struct ata_port *ap) { void __iomem *port_mmio = ahci_port_base(ap); struct ahci_port_priv *pp = ap->private_data; u32 cmd; cmd = readl(port_mmio + PORT_CMD); cmd |= PORT_CMD_PMP; writel(cmd, port_mmio + PORT_CMD); ahci_enable_fbs(ap); pp->intr_mask |= PORT_IRQ_BAD_PMP; writel(pp->intr_mask, port_mmio + PORT_IRQ_MASK); } static void ahci_pmp_detach(struct ata_port *ap) { void __iomem *port_mmio = ahci_port_base(ap); struct ahci_port_priv *pp = ap->private_data; u32 cmd; ahci_disable_fbs(ap); cmd = readl(port_mmio + PORT_CMD); cmd &= ~PORT_CMD_PMP; writel(cmd, port_mmio + PORT_CMD); pp->intr_mask &= ~PORT_IRQ_BAD_PMP; writel(pp->intr_mask, port_mmio + PORT_IRQ_MASK); } static int ahci_port_resume(struct ata_port *ap) { ahci_power_up(ap); ahci_start_port(ap); if (sata_pmp_attached(ap)) ahci_pmp_attach(ap); else ahci_pmp_detach(ap); return 0; } #ifdef CONFIG_PM static int ahci_port_suspend(struct ata_port *ap, pm_message_t mesg) { const char *emsg = NULL; int rc; rc = ahci_deinit_port(ap, &emsg); if (rc == 0) ahci_power_down(ap); else { ata_port_printk(ap, KERN_ERR, "%s (%d)\n", emsg, rc); ahci_start_port(ap); } return rc; } #endif static int ahci_port_start(struct ata_port *ap) { struct ahci_host_priv *hpriv = ap->host->private_data; struct device *dev = ap->host->dev; struct ahci_port_priv *pp; void *mem; dma_addr_t mem_dma; size_t dma_sz, rx_fis_sz; pp = devm_kzalloc(dev, sizeof(*pp), GFP_KERNEL); if (!pp) return -ENOMEM; /* check FBS capability */ if ((hpriv->cap & HOST_CAP_FBS) && sata_pmp_supported(ap)) { void __iomem *port_mmio = ahci_port_base(ap); u32 cmd = readl(port_mmio + PORT_CMD); if (cmd & PORT_CMD_FBSCP) pp->fbs_supported = true; else dev_printk(KERN_WARNING, dev, "The port is not capable of FBS\n"); } if (pp->fbs_supported) { dma_sz = AHCI_PORT_PRIV_FBS_DMA_SZ; rx_fis_sz = AHCI_RX_FIS_SZ * 16; } else { dma_sz = AHCI_PORT_PRIV_DMA_SZ; rx_fis_sz = AHCI_RX_FIS_SZ; } mem = dmam_alloc_coherent(dev, dma_sz, &mem_dma, GFP_KERNEL); if (!mem) return -ENOMEM; memset(mem, 0, dma_sz); /* * First item in chunk of DMA memory: 32-slot command table, * 32 bytes each in size */ pp->cmd_slot = mem; pp->cmd_slot_dma = mem_dma; mem += AHCI_CMD_SLOT_SZ; mem_dma += AHCI_CMD_SLOT_SZ; /* * Second item: Received-FIS area */ pp->rx_fis = mem; pp->rx_fis_dma = mem_dma; mem += rx_fis_sz; mem_dma += rx_fis_sz; /* * Third item: data area for storing a single command * and its scatter-gather table */ pp->cmd_tbl = mem; pp->cmd_tbl_dma = mem_dma; /* * Save off initial list of interrupts to be enabled. * This could be changed later */ pp->intr_mask = DEF_PORT_IRQ; ap->private_data = pp; /* engage engines, captain */ return ahci_port_resume(ap); } static void ahci_port_stop(struct ata_port *ap) { const char *emsg = NULL; int rc; /* de-initialize port */ rc = ahci_deinit_port(ap, &emsg); if (rc) ata_port_printk(ap, KERN_WARNING, "%s (%d)\n", emsg, rc); } void ahci_print_info(struct ata_host *host, const char *scc_s) { struct ahci_host_priv *hpriv = host->private_data; void __iomem *mmio = hpriv->mmio; u32 vers, cap, cap2, impl, speed; const char *speed_s; vers = readl(mmio + HOST_VERSION); cap = hpriv->cap; cap2 = hpriv->cap2; impl = hpriv->port_map; speed = (cap >> 20) & 0xf; if (speed == 1) speed_s = "1.5"; else if (speed == 2) speed_s = "3"; else if (speed == 3) speed_s = "6"; else speed_s = "?"; dev_info(host->dev, "AHCI %02x%02x.%02x%02x " "%u slots %u ports %s Gbps 0x%x impl %s mode\n" , (vers >> 24) & 0xff, (vers >> 16) & 0xff, (vers >> 8) & 0xff, vers & 0xff, ((cap >> 8) & 0x1f) + 1, (cap & 0x1f) + 1, speed_s, impl, scc_s); dev_info(host->dev, "flags: " "%s%s%s%s%s%s%s" "%s%s%s%s%s%s%s" "%s%s%s%s%s%s\n" , cap & HOST_CAP_64 ? "64bit " : "", cap & HOST_CAP_NCQ ? "ncq " : "", cap & HOST_CAP_SNTF ? "sntf " : "", cap & HOST_CAP_MPS ? "ilck " : "", cap & HOST_CAP_SSS ? "stag " : "", cap & HOST_CAP_ALPM ? "pm " : "", cap & HOST_CAP_LED ? "led " : "", cap & HOST_CAP_CLO ? "clo " : "", cap & HOST_CAP_ONLY ? "only " : "", cap & HOST_CAP_PMP ? "pmp " : "", cap & HOST_CAP_FBS ? "fbs " : "", cap & HOST_CAP_PIO_MULTI ? "pio " : "", cap & HOST_CAP_SSC ? "slum " : "", cap & HOST_CAP_PART ? "part " : "", cap & HOST_CAP_CCC ? "ccc " : "", cap & HOST_CAP_EMS ? "ems " : "", cap & HOST_CAP_SXS ? "sxs " : "", cap2 & HOST_CAP2_APST ? "apst " : "", cap2 & HOST_CAP2_NVMHCI ? "nvmp " : "", cap2 & HOST_CAP2_BOH ? "boh " : "" ); } EXPORT_SYMBOL_GPL(ahci_print_info); void ahci_set_em_messages(struct ahci_host_priv *hpriv, struct ata_port_info *pi) { u8 messages; void __iomem *mmio = hpriv->mmio; u32 em_loc = readl(mmio + HOST_EM_LOC); u32 em_ctl = readl(mmio + HOST_EM_CTL); if (!ahci_em_messages || !(hpriv->cap & HOST_CAP_EMS)) return; messages = (em_ctl & EM_CTRL_MSG_TYPE) >> 16; /* we only support LED message type right now */ if ((messages & 0x01) && (ahci_em_messages == 1)) { /* store em_loc */ hpriv->em_loc = ((em_loc >> 16) * 4); pi->flags |= ATA_FLAG_EM; if (!(em_ctl & EM_CTL_ALHD)) pi->flags |= ATA_FLAG_SW_ACTIVITY; } } EXPORT_SYMBOL_GPL(ahci_set_em_messages); MODULE_AUTHOR("Jeff Garzik"); MODULE_DESCRIPTION("Common AHCI SATA low-level routines"); MODULE_LICENSE("GPL");