| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Anton Vorontsov | 7611 | 59.56% | 3 | 1.78% |
| Tejun Heo | 693 | 5.42% | 40 | 23.67% |
| Harry Zhang | 600 | 4.70% | 3 | 1.78% |
| Niklas Svensson (Niklas Cassel) | 516 | 4.04% | 8 | 4.73% |
| Shane Huang | 392 | 3.07% | 3 | 1.78% |
| Jeff Garzik | 383 | 3.00% | 12 | 7.10% |
| Alexander Gordeev | 341 | 2.67% | 7 | 4.14% |
| Kristen Carlson Accardi | 195 | 1.53% | 3 | 1.78% |
| Yuan-Hsin Chen | 161 | 1.26% | 1 | 0.59% |
| Serge Semin | 160 | 1.25% | 3 | 1.78% |
| Suman Tripathi | 143 | 1.12% | 4 | 2.37% |
| Hannes Reinecke | 131 | 1.03% | 4 | 2.37% |
| Mika Westerberg | 129 | 1.01% | 2 | 1.18% |
| Matthew Garrett | 119 | 0.93% | 1 | 0.59% |
| Xiangliang Yu | 102 | 0.80% | 2 | 1.18% |
| Bart Van Assche | 87 | 0.68% | 2 | 1.18% |
| Danesh Petigara | 74 | 0.58% | 1 | 0.59% |
| Mario Limonciello | 70 | 0.55% | 1 | 0.59% |
| Srinivas Pandruvada | 69 | 0.54% | 3 | 1.78% |
| Szuying Chen | 67 | 0.52% | 1 | 0.59% |
| Robert Hancock | 58 | 0.45% | 2 | 1.18% |
| Doug Berger | 41 | 0.32% | 2 | 1.18% |
| Dan J Williams | 37 | 0.29% | 6 | 3.55% |
| Bartosz Golaszewski | 36 | 0.28% | 1 | 0.59% |
| Jacob jun Pan | 35 | 0.27% | 1 | 0.59% |
| Evan Wang | 34 | 0.27% | 1 | 0.59% |
| Hans de Goede | 34 | 0.27% | 1 | 0.59% |
| Xingui Yang | 30 | 0.23% | 1 | 0.59% |
| Kefeng Wang | 30 | 0.23% | 1 | 0.59% |
| Langsdorf, Mark | 30 | 0.23% | 1 | 0.59% |
| Joe Perches | 28 | 0.22% | 2 | 1.18% |
| Kees Cook | 28 | 0.22% | 1 | 0.59% |
| Christoph Hellwig | 26 | 0.20% | 1 | 0.59% |
| Stefan Roese | 24 | 0.19% | 1 | 0.59% |
| Pang Raymond | 23 | 0.18% | 1 | 0.59% |
| Markus Trippelsdorf | 22 | 0.17% | 1 | 0.59% |
| John Garry | 22 | 0.17% | 2 | 1.18% |
| Damien Le Moal | 20 | 0.16% | 4 | 2.37% |
| Brian Norris | 16 | 0.13% | 1 | 0.59% |
| DaeSeok Youn | 15 | 0.12% | 2 | 1.18% |
| Antoine Tenart | 15 | 0.12% | 1 | 0.59% |
| Bartlomiej Zolnierkiewicz | 13 | 0.10% | 2 | 1.18% |
| Arjan van de Ven | 13 | 0.10% | 1 | 0.59% |
| Maxime Bizon | 12 | 0.09% | 1 | 0.59% |
| David Milburn | 10 | 0.08% | 1 | 0.59% |
| Robert Richter | 9 | 0.07% | 1 | 0.59% |
| Chuansheng Liu | 8 | 0.06% | 1 | 0.59% |
| Sergey Shtylyov | 7 | 0.05% | 3 | 1.78% |
| Jiri Slaby | 7 | 0.05% | 1 | 0.59% |
| Alan Cox | 6 | 0.05% | 2 | 1.18% |
| Jeremy Higdon | 6 | 0.05% | 1 | 0.59% |
| Richard Zhu | 5 | 0.04% | 1 | 0.59% |
| Rob Herring | 5 | 0.04% | 1 | 0.59% |
| Gabriele Mazzotta | 5 | 0.04% | 2 | 1.18% |
| Jens Axboe | 4 | 0.03% | 1 | 0.59% |
| Xiaotian Feng | 4 | 0.03% | 1 | 0.59% |
| Adam Manzanares | 3 | 0.02% | 1 | 0.59% |
| Domen Puncer | 3 | 0.02% | 1 | 0.59% |
| Minwoo Im | 2 | 0.02% | 1 | 0.59% |
| Lukasz Dorau | 2 | 0.02% | 1 | 0.59% |
| Thomas Gleixner | 2 | 0.02% | 1 | 0.59% |
| Wei Yongjun | 1 | 0.01% | 1 | 0.59% |
| Tony Jones | 1 | 0.01% | 1 | 0.59% |
| Sander Eikelenboom | 1 | 0.01% | 1 | 0.59% |
| Sergei Shtylyov | 1 | 0.01% | 1 | 0.59% |
| Srinivas Kandagatla | 1 | 0.01% | 1 | 0.59% |
| Rashika Kheria | 1 | 0.01% | 1 | 0.59% |
| Total | 12779 | 169 |
// SPDX-License-Identifier: GPL-2.0-or-later /* * libahci.c - Common AHCI SATA low-level routines * * Maintained by: Tejun Heo <tj@kernel.org> * Please ALWAYS copy linux-ide@vger.kernel.org * on emails. * * Copyright 2004-2005 Red Hat, Inc. * * libata documentation is available via 'make {ps|pdf}docs', * as Documentation/driver-api/libata.rst * * AHCI hardware documentation: * http://www.intel.com/technology/serialata/pdf/rev1_0.pdf * http://www.intel.com/technology/serialata/pdf/rev1_1.pdf */ #include <linux/bitops.h> #include <linux/kernel.h> #include <linux/gfp.h> #include <linux/module.h> #include <linux/nospec.h> #include <linux/blkdev.h> #include <linux/delay.h> #include <linux/interrupt.h> #include <linux/dma-mapping.h> #include <linux/device.h> #include <scsi/scsi_host.h> #include <scsi/scsi_cmnd.h> #include <linux/libata.h> #include <linux/pci.h> #include "ahci.h" #include "libata.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_set_lpm(struct ata_link *link, enum ata_lpm_policy policy, unsigned hints); 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 void ahci_qc_fill_rtf(struct ata_queued_cmd *qc); static void ahci_qc_ncq_fill_rtf(struct ata_port *ap, u64 done_mask); static int ahci_port_start(struct ata_port *ap); static void ahci_port_stop(struct ata_port *ap); static enum ata_completion_errors 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_post_internal_cmd(struct ata_queued_cmd *qc); static void ahci_dev_config(struct ata_device *dev); #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 ssize_t ahci_read_em_buffer(struct device *dev, struct device_attribute *attr, char *buf); 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 irqreturn_t ahci_single_level_irq_intr(int irq, void *dev_instance); 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 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); static struct attribute *ahci_shost_attrs[] = { &dev_attr_link_power_management_policy.attr, &dev_attr_em_message_type.attr, &dev_attr_em_message.attr, &dev_attr_ahci_host_caps.attr, &dev_attr_ahci_host_cap2.attr, &dev_attr_ahci_host_version.attr, &dev_attr_ahci_port_cmd.attr, &dev_attr_em_buffer.attr, &dev_attr_em_message_supported.attr, NULL }; static const struct attribute_group ahci_shost_attr_group = { .attrs = ahci_shost_attrs }; const struct attribute_group *ahci_shost_groups[] = { &ahci_shost_attr_group, NULL }; EXPORT_SYMBOL_GPL(ahci_shost_groups); static struct attribute *ahci_sdev_attrs[] = { &dev_attr_sw_activity.attr, &dev_attr_unload_heads.attr, &dev_attr_ncq_prio_supported.attr, &dev_attr_ncq_prio_enable.attr, NULL }; static const struct attribute_group ahci_sdev_attr_group = { .attrs = ahci_sdev_attrs }; const struct attribute_group *ahci_sdev_groups[] = { &ahci_sdev_attr_group, NULL }; EXPORT_SYMBOL_GPL(ahci_sdev_groups); 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, .qc_ncq_fill_rtf = ahci_qc_ncq_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, .set_lpm = ahci_set_lpm, .em_show = ahci_led_show, .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, #endif .port_start = ahci_port_start, .port_stop = ahci_port_stop, }; EXPORT_SYMBOL_GPL(ahci_ops); 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; 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; 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); } /** * ahci_rpm_get_port - Make sure the port is powered on * @ap: Port to power on * * Whenever there is need to access the AHCI host registers outside of * normal execution paths, call this function to make sure the host is * actually powered on. */ static int ahci_rpm_get_port(struct ata_port *ap) { return pm_runtime_get_sync(ap->dev); } /** * ahci_rpm_put_port - Undoes ahci_rpm_get_port() * @ap: Port to power down * * Undoes ahci_rpm_get_port() and possibly powers down the AHCI host * if it has no more active users. */ static void ahci_rpm_put_port(struct ata_port *ap) { pm_runtime_put(ap->dev); } 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; return sprintf(buf, "%x\n", hpriv->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); ssize_t ret; ahci_rpm_get_port(ap); ret = sprintf(buf, "%x\n", readl(port_mmio + PORT_CMD)); ahci_rpm_put_port(ap); return ret; } static ssize_t ahci_read_em_buffer(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; void __iomem *em_mmio = mmio + hpriv->em_loc; u32 em_ctl, msg; unsigned long flags; size_t count; int i; ahci_rpm_get_port(ap); spin_lock_irqsave(ap->lock, flags); em_ctl = readl(mmio + HOST_EM_CTL); if (!(ap->flags & ATA_FLAG_EM) || em_ctl & EM_CTL_XMT || !(hpriv->em_msg_type & EM_MSG_TYPE_SGPIO)) { spin_unlock_irqrestore(ap->lock, flags); ahci_rpm_put_port(ap); return -EINVAL; } if (!(em_ctl & EM_CTL_MR)) { spin_unlock_irqrestore(ap->lock, flags); ahci_rpm_put_port(ap); return -EAGAIN; } if (!(em_ctl & EM_CTL_SMB)) em_mmio += hpriv->em_buf_sz; count = hpriv->em_buf_sz; /* the count should not be larger than PAGE_SIZE */ if (count > PAGE_SIZE) { if (printk_ratelimit()) 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; } for (i = 0; i < count; i += 4) { msg = readl(em_mmio + i); buf[i] = msg & 0xff; buf[i + 1] = (msg >> 8) & 0xff; buf[i + 2] = (msg >> 16) & 0xff; buf[i + 3] = (msg >> 24) & 0xff; } spin_unlock_irqrestore(ap->lock, flags); ahci_rpm_put_port(ap); return i; } static ssize_t ahci_store_em_buffer(struct device *dev, struct device_attribute *attr, const char *buf, size_t size) { 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; void __iomem *em_mmio = mmio + hpriv->em_loc; const unsigned char *msg_buf = buf; u32 em_ctl, msg; unsigned long flags; int i; /* check size validity */ if (!(ap->flags & ATA_FLAG_EM) || !(hpriv->em_msg_type & EM_MSG_TYPE_SGPIO) || size % 4 || size > hpriv->em_buf_sz) return -EINVAL; ahci_rpm_get_port(ap); spin_lock_irqsave(ap->lock, flags); em_ctl = readl(mmio + HOST_EM_CTL); if (em_ctl & EM_CTL_TM) { spin_unlock_irqrestore(ap->lock, flags); ahci_rpm_put_port(ap); return -EBUSY; } for (i = 0; i < size; i += 4) { msg = msg_buf[i] | msg_buf[i + 1] << 8 | msg_buf[i + 2] << 16 | msg_buf[i + 3] << 24; writel(msg, em_mmio + i); } writel(em_ctl | EM_CTL_TM, mmio + HOST_EM_CTL); spin_unlock_irqrestore(ap->lock, flags); ahci_rpm_put_port(ap); 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; ahci_rpm_get_port(ap); em_ctl = readl(mmio + HOST_EM_CTL); ahci_rpm_put_port(ap); 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 * @hpriv: host private area to store config values * * 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. * * If it is not set already this function sets hpriv->start_engine to * ahci_start_engine. * * LOCKING: * None. */ void ahci_save_initial_config(struct device *dev, struct ahci_host_priv *hpriv) { void __iomem *mmio = hpriv->mmio; void __iomem *port_mmio; unsigned long port_map; u32 cap, cap2, vers; int i; /* make sure AHCI mode is enabled before accessing CAP */ ahci_enable_ahci(mmio); /* * Values prefixed with saved_ are written back to the HBA and ports * registers after reset. Values without are used for driver operation. */ /* * Override HW-init HBA capability fields with the platform-specific * values. The rest of the HBA capabilities are defined as Read-only * and can't be modified in CSR anyway. */ cap = readl(mmio + HOST_CAP); if (hpriv->saved_cap) cap = (cap & ~(HOST_CAP_SSS | HOST_CAP_MPS)) | hpriv->saved_cap; hpriv->saved_cap = cap; /* 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_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_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_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_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_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_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 (!(cap & HOST_CAP_ALPM) && (hpriv->flags & AHCI_HFLAG_YES_ALPM)) { dev_info(dev, "controller can do ALPM, turning on CAP_ALPM\n"); cap |= HOST_CAP_ALPM; } if ((cap & HOST_CAP_SXS) && (hpriv->flags & AHCI_HFLAG_NO_SXS)) { dev_info(dev, "controller does not support SXS, disabling CAP_SXS\n"); cap &= ~HOST_CAP_SXS; } /* Override the HBA ports mapping if the platform needs it */ port_map = readl(mmio + HOST_PORTS_IMPL); if (hpriv->saved_port_map && port_map != hpriv->saved_port_map) { dev_info(dev, "forcing port_map 0x%lx -> 0x%x\n", port_map, hpriv->saved_port_map); port_map = hpriv->saved_port_map; } else { hpriv->saved_port_map = port_map; } if (hpriv->mask_port_map) { dev_warn(dev, "masking port_map 0x%lx -> 0x%lx\n", port_map, port_map & hpriv->mask_port_map); port_map &= hpriv->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_warn(dev, "implemented port map (0x%lx) 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 for < AHCI 1.3 */ if (!port_map && vers < 0x10300) { port_map = (1 << ahci_nr_ports(cap)) - 1; dev_warn(dev, "forcing PORTS_IMPL to 0x%lx\n", port_map); /* write the fixed up value to the PI register */ hpriv->saved_port_map = port_map; } /* * Preserve the ports capabilities defined by the platform. Note there * is no need in storing the rest of the P#.CMD fields since they are * volatile. */ for_each_set_bit(i, &port_map, AHCI_MAX_PORTS) { if (hpriv->saved_port_cap[i]) continue; port_mmio = __ahci_port_base(hpriv, i); hpriv->saved_port_cap[i] = readl(port_mmio + PORT_CMD) & PORT_CMD_CAP; } /* record values to use during operation */ hpriv->cap = cap; hpriv->cap2 = cap2; hpriv->version = vers; hpriv->port_map = port_map; if (!hpriv->start_engine) hpriv->start_engine = ahci_start_engine; if (!hpriv->stop_engine) hpriv->stop_engine = ahci_stop_engine; if (!hpriv->irq_handler) hpriv->irq_handler = ahci_single_level_irq_intr; } 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; unsigned long port_map = hpriv->port_map; void __iomem *mmio = hpriv->mmio; void __iomem *port_mmio; int i; 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 */ for_each_set_bit(i, &port_map, AHCI_MAX_PORTS) { port_mmio = __ahci_port_base(hpriv, i); writel(hpriv->saved_port_cap[i], port_mmio + PORT_CMD); } } 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; } void ahci_start_engine(struct ata_port *ap) { void __iomem *port_mmio = ahci_port_base(ap); u32 tmp; /* 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); struct ahci_host_priv *hpriv = ap->host->private_data; u32 tmp; /* * On some controllers, stopping a port's DMA engine while the port * is in ALPM state (partial or slumber) results in failures on * subsequent DMA engine starts. For those controllers, put the * port back in active state before stopping its DMA engine. */ if ((hpriv->flags & AHCI_HFLAG_WAKE_BEFORE_STOP) && (ap->link.lpm_policy > ATA_LPM_MAX_POWER) && ahci_set_lpm(&ap->link, ATA_LPM_MAX_POWER, ATA_LPM_WAKE_ONLY)) { dev_err(ap->host->dev, "Failed to wake up port before engine stop\n"); return -EIO; } tmp = readl(port_mmio + PORT_CMD); /* check if the HBA is idle */ if ((tmp & (PORT_CMD_START | PORT_CMD_LIST_ON)) == 0) return 0; /* * Don't try to issue commands but return with ENODEV if the * AHCI controller not available anymore (e.g. due to PCIe hot * unplugging). Otherwise a 500ms delay for each port is added. */ if (tmp == 0xffffffff) { dev_err(ap->host->dev, "AHCI controller unavailable!\n"); return -ENODEV; } /* 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(ap, 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); 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); } EXPORT_SYMBOL_GPL(ahci_start_fis_rx); 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(ap, 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 int ahci_set_lpm(struct ata_link *link, enum ata_lpm_policy policy, unsigned int hints) { struct ata_port *ap = link->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); if (policy != ATA_LPM_MAX_POWER) { /* wakeup flag only applies to the max power policy */ hints &= ~ATA_LPM_WAKE_ONLY; /* * Disable interrupts on Phy Ready. This keeps us from * getting woken up due to spurious phy ready * interrupts. */ pp->intr_mask &= ~PORT_IRQ_PHYRDY; writel(pp->intr_mask, port_mmio + PORT_IRQ_MASK); sata_link_scr_lpm(link, policy, false); } if (hpriv->cap & HOST_CAP_ALPM) { u32 cmd = readl(port_mmio + PORT_CMD); if (policy == ATA_LPM_MAX_POWER || !(hints & ATA_LPM_HIPM)) { if (!(hints & ATA_LPM_WAKE_ONLY)) cmd &= ~(PORT_CMD_ASP | PORT_CMD_ALPE); cmd |= PORT_CMD_ICC_ACTIVE; writel(cmd, port_mmio + PORT_CMD); readl(port_mmio + PORT_CMD); /* wait 10ms to be sure we've come out of LPM state */ ata_msleep(ap, 10); if (hints & ATA_LPM_WAKE_ONLY) return 0; } else { cmd |= PORT_CMD_ALPE; if (policy == ATA_LPM_MIN_POWER) cmd |= PORT_CMD_ASP; else if (policy == ATA_LPM_MIN_POWER_WITH_PARTIAL) cmd &= ~PORT_CMD_ASP; /* write out new cmd value */ writel(cmd, port_mmio + PORT_CMD); } } /* 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 || policy == ATA_LPM_MIN_POWER_WITH_PARTIAL) 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); /* turn PHYRDY IRQ back on */ pp->intr_mask |= PORT_IRQ_PHYRDY; writel(pp->intr_mask, port_mmio + PORT_IRQ_MASK); } 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_host_priv *hpriv = ap->host->private_data; 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 */ if (!(hpriv->flags & AHCI_HFLAG_DELAY_ENGINE)) hpriv->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 = 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) 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; struct ahci_host_priv *hpriv = ap->host->private_data; /* disable DMA */ rc = hpriv->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) { dev_info(host->dev, "Skipping global host reset\n"); return 0; } tmp = readl(mmio + HOST_CTL); if (!(tmp & HOST_RESET)) { 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(NULL, mmio + HOST_CTL, HOST_RESET, HOST_RESET, 10, 1000); if (tmp & HOST_RESET) { dev_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. */ if (!(hpriv->flags & AHCI_HFLAG_NO_WRITE_TO_RO)) ahci_restore_initial_config(host); 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(struct timer_list *t) { struct ahci_em_priv *emp = from_timer(emp, t, timer); struct ata_link *link = emp->link; struct ata_port *ap = link->ap; 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); ap->ops->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; emp->link = link; timer_setup(&emp->timer, ahci_sw_activity_blink, 0); /* 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; ahci_rpm_get_port(ap); 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); ahci_rpm_put_port(ap); return -EBUSY; } if (hpriv->em_msg_type & EM_MSG_TYPE_LED) { /* * 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); /* * tell hardware to transmit the message */ writel(em_ctl | EM_CTL_TM, mmio + HOST_EM_CTL); } /* save off new led state for port/slot */ emp->led_state = state; spin_unlock_irqrestore(ap->lock, flags); ahci_rpm_put_port(ap); 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) { unsigned int state; int pmp; struct ahci_port_priv *pp = ap->private_data; struct ahci_em_priv *emp; if (kstrtouint(buf, 0, &state) < 0) return -EINVAL; /* get the slot number from the message */ pmp = (state & EM_MSG_LED_PMP_SLOT) >> 8; if (pmp < EM_MAX_SLOTS) { pmp = array_index_nospec(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 ap->ops->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)); ap->ops->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 */ ap->ops->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_clear_pending_irq(struct ata_port *ap) { struct ahci_host_priv *hpriv = ap->host->private_data; void __iomem *port_mmio = ahci_port_base(ap); u32 tmp; /* clear SError */ tmp = readl(port_mmio + PORT_SCR_ERR); dev_dbg(ap->host->dev, "PORT_SCR_ERR 0x%x\n", tmp); writel(tmp, port_mmio + PORT_SCR_ERR); /* clear port IRQ */ tmp = readl(port_mmio + PORT_IRQ_STAT); dev_dbg(ap->host->dev, "PORT_IRQ_STAT 0x%x\n", tmp); if (tmp) writel(tmp, port_mmio + PORT_IRQ_STAT); writel(1 << ap->port_no, hpriv->mmio + HOST_IRQ_STAT); } 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; /* make sure port is not active */ rc = ahci_deinit_port(ap, &emsg); if (rc) dev_warn(dev, "%s (%d)\n", emsg, rc); ahci_port_clear_pending_irq(ap); } 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); dev_dbg(host->dev, "HOST_CTL 0x%x\n", tmp); writel(tmp | HOST_IRQ_EN, mmio + HOST_CTL); tmp = readl(mmio + HOST_CTL); dev_dbg(host->dev, "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_info(dev, "SB600 AHCI: limiting to 255 sectors per cmd\n"); } } 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_port_classify(ap, &tf); } EXPORT_SYMBOL_GPL(ahci_dev_classify); 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); } EXPORT_SYMBOL_GPL(ahci_fill_cmd_slot); 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 = hpriv->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(ap, port_mmio + PORT_CMD, PORT_CMD_CLO, PORT_CMD_CLO, 1, 500); if (tmp & PORT_CMD_CLO) rc = -EIO; /* restart engine */ out_restart: hpriv->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 int 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)); /* set port value for softreset of Port Multiplier */ if (pp->fbs_enabled && pp->fbs_last_dev != pmp) { tmp = readl(port_mmio + PORT_FBS); tmp &= ~(PORT_FBS_DEV_MASK | PORT_FBS_DEC); tmp |= pmp << PORT_FBS_DEV_OFFSET; writel(tmp, port_mmio + PORT_FBS); pp->fbs_last_dev = pmp; } /* issue & wait */ writel(1, port_mmio + PORT_CMD_ISSUE); if (timeout_msec) { tmp = ata_wait_register(ap, 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; struct ahci_port_priv *pp = ap->private_data; const char *reason = NULL; unsigned long now; unsigned int msecs; struct ata_taskfile tf; bool fbs_disabled = false; int rc; /* prepare for SRST (AHCI-1.1 10.4.1) */ rc = ahci_kick_engine(ap); if (rc && rc != -EOPNOTSUPP) 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); /* issue the first H2D Register FIS */ msecs = 0; now = jiffies; if (time_after(deadline, now)) 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 */ ata_msleep(ap, 1); /* issue the second H2D 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_info(link, "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); /* re-enable FBS if disabled before */ if (fbs_disabled) ahci_enable_fbs(ap); return 0; fail: ata_link_err(link, "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); return ahci_do_softreset(link, class, pmp, deadline, ahci_check_ready); } 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; 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; } int ahci_do_hardreset(struct ata_link *link, unsigned int *class, unsigned long deadline, bool *online) { const unsigned int *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; int rc; hpriv->stop_engine(ap); /* clear D2H reception area to properly wait for D2H FIS */ ata_tf_init(link->device, &tf); tf.status = ATA_BUSY; ata_tf_to_fis(&tf, 0, 0, d2h_fis); ahci_port_clear_pending_irq(ap); rc = sata_link_hardreset(link, timing, deadline, online, ahci_check_ready); hpriv->start_engine(ap); if (*online) *class = ahci_dev_classify(ap); return rc; } EXPORT_SYMBOL_GPL(ahci_do_hardreset); static int ahci_hardreset(struct ata_link *link, unsigned int *class, unsigned long deadline) { bool online; return ahci_do_hardreset(link, class, deadline, &online); } 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; /* * 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 enum ata_completion_errors 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->hw_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->hw_tag, opts); return AC_ERR_OK; } 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; 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_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)) { 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 = 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_qc_complete(struct ata_port *ap, void __iomem *port_mmio) { struct ata_eh_info *ehi = &ap->link.eh_info; struct ahci_port_priv *pp = ap->private_data; u32 qc_active = 0; int rc; /* * 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); if (unlikely(rc < 0 && !(ap->pflags & ATA_PFLAG_RESETTING))) { ehi->err_mask |= AC_ERR_HSM; ehi->action |= ATA_EH_RESET; ata_port_freeze(ap); } } static void ahci_handle_port_interrupt(struct ata_port *ap, void __iomem *port_mmio, u32 status) { struct ahci_port_priv *pp = ap->private_data; struct ahci_host_priv *hpriv = ap->host->private_data; /* ignore BAD_PMP while resetting */ if (unlikely(ap->pflags & ATA_PFLAG_RESETTING)) status &= ~PORT_IRQ_BAD_PMP; if (sata_lpm_ignore_phy_events(&ap->link)) { status &= ~PORT_IRQ_PHYRDY; ahci_scr_write(&ap->link, SCR_ERROR, SERR_PHYRDY_CHG); } if (unlikely(status & PORT_IRQ_ERROR)) { /* * Before getting the error notification, we may have * received SDB FISes notifying successful completions. * Handle these first and then handle the error. */ ahci_qc_complete(ap, port_mmio); 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); } } } /* Handle completed commands */ ahci_qc_complete(ap, port_mmio); } 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); } static irqreturn_t ahci_multi_irqs_intr_hard(int irq, void *dev_instance) { struct ata_port *ap = dev_instance; void __iomem *port_mmio = ahci_port_base(ap); u32 status; status = readl(port_mmio + PORT_IRQ_STAT); writel(status, port_mmio + PORT_IRQ_STAT); spin_lock(ap->lock); ahci_handle_port_interrupt(ap, port_mmio, status); spin_unlock(ap->lock); return IRQ_HANDLED; } u32 ahci_handle_port_intr(struct ata_host *host, u32 irq_masked) { unsigned int i, handled = 0; 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); } else { if (ata_ratelimit()) dev_warn(host->dev, "interrupt on disabled port %u\n", i); } handled = 1; } return handled; } EXPORT_SYMBOL_GPL(ahci_handle_port_intr); static irqreturn_t ahci_single_level_irq_intr(int irq, void *dev_instance) { struct ata_host *host = dev_instance; struct ahci_host_priv *hpriv; unsigned int rc = 0; void __iomem *mmio; u32 irq_stat, irq_masked; 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); rc = ahci_handle_port_intr(host, irq_masked); /* 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); return IRQ_RETVAL(rc); } 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 (ata_is_ncq(qc->tf.protocol)) writel(1 << qc->hw_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->hw_tag, port_mmio + PORT_CMD_ISSUE); ahci_sw_activity(qc->dev->link); return 0; } EXPORT_SYMBOL_GPL(ahci_qc_issue); static void ahci_qc_fill_rtf(struct ata_queued_cmd *qc) { struct ahci_port_priv *pp = qc->ap->private_data; u8 *rx_fis = pp->rx_fis; /* * rtf may already be filled (e.g. for successful NCQ commands). * If that is the case, we have nothing to do. */ if (qc->flags & ATA_QCFLAG_RTF_FILLED) return; if (pp->fbs_enabled) rx_fis += qc->dev->link->pmp * AHCI_RX_FIS_SZ; /* * After a successful execution of an ATA PIO data-in command, * the device doesn't send D2H Reg FIS to update the TF and * the host should take TF and E_Status from the preceding PIO * Setup FIS. */ if (qc->tf.protocol == ATA_PROT_PIO && qc->dma_dir == DMA_FROM_DEVICE && !(qc->flags & ATA_QCFLAG_EH)) { ata_tf_from_fis(rx_fis + RX_FIS_PIO_SETUP, &qc->result_tf); qc->result_tf.status = (rx_fis + RX_FIS_PIO_SETUP)[15]; qc->flags |= ATA_QCFLAG_RTF_FILLED; return; } /* * For NCQ commands, we never get a D2H FIS, so reading the D2H Register * FIS area of the Received FIS Structure (which contains a copy of the * last D2H FIS received) will contain an outdated status code. * For NCQ commands, we instead get a SDB FIS, so read the SDB FIS area * instead. However, the SDB FIS does not contain the LBA, so we can't * use the ata_tf_from_fis() helper. */ if (ata_is_ncq(qc->tf.protocol)) { const u8 *fis = rx_fis + RX_FIS_SDB; /* * Successful NCQ commands have been filled already. * A failed NCQ command will read the status here. * (Note that a failed NCQ command will get a more specific * error when reading the NCQ Command Error log.) */ qc->result_tf.status = fis[2]; qc->result_tf.error = fis[3]; qc->flags |= ATA_QCFLAG_RTF_FILLED; return; } ata_tf_from_fis(rx_fis + RX_FIS_D2H_REG, &qc->result_tf); qc->flags |= ATA_QCFLAG_RTF_FILLED; } static void ahci_qc_ncq_fill_rtf(struct ata_port *ap, u64 done_mask) { struct ahci_port_priv *pp = ap->private_data; const u8 *fis; /* No outstanding commands. */ if (!ap->qc_active) return; /* * FBS not enabled, so read status and error once, since they are shared * for all QCs. */ if (!pp->fbs_enabled) { u8 status, error; /* No outstanding NCQ commands. */ if (!pp->active_link->sactive) return; fis = pp->rx_fis + RX_FIS_SDB; status = fis[2]; error = fis[3]; while (done_mask) { struct ata_queued_cmd *qc; unsigned int tag = __ffs64(done_mask); qc = ata_qc_from_tag(ap, tag); if (qc && ata_is_ncq(qc->tf.protocol)) { qc->result_tf.status = status; qc->result_tf.error = error; qc->flags |= ATA_QCFLAG_RTF_FILLED; } done_mask &= ~(1ULL << tag); } return; } /* * FBS enabled, so read the status and error for each QC, since the QCs * can belong to different PMP links. (Each PMP link has its own FIS * Receive Area.) */ while (done_mask) { struct ata_queued_cmd *qc; unsigned int tag = __ffs64(done_mask); qc = ata_qc_from_tag(ap, tag); if (qc && ata_is_ncq(qc->tf.protocol)) { fis = pp->rx_fis; fis += qc->dev->link->pmp * AHCI_RX_FIS_SZ; fis += RX_FIS_SDB; qc->result_tf.status = fis[2]; qc->result_tf.error = fis[3]; qc->flags |= ATA_QCFLAG_RTF_FILLED; } done_mask &= ~(1ULL << tag); } } 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); } void ahci_error_handler(struct ata_port *ap) { struct ahci_host_priv *hpriv = ap->host->private_data; if (!ata_port_is_frozen(ap)) { /* restart engine */ hpriv->stop_engine(ap); hpriv->start_engine(ap); } sata_pmp_error_handler(ap); if (!ata_dev_enabled(ap->link.device)) hpriv->stop_engine(ap); } EXPORT_SYMBOL_GPL(ahci_error_handler); 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_EH) 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, dito_conf; int rc; unsigned int err_mask; devslp = readl(port_mmio + PORT_DEVSLP); if (!(devslp & PORT_DEVSLP_DSP)) { dev_info(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; } dm = (devslp & PORT_DEVSLP_DM_MASK) >> PORT_DEVSLP_DM_OFFSET; dito = devslp_idle_timeout / (dm + 1); if (dito > 0x3ff) dito = 0x3ff; dito_conf = (devslp >> PORT_DEVSLP_DITO_OFFSET) & 0x3FF; /* device sleep was already enabled and same dito */ if ((devslp & PORT_DEVSLP_ADSE) && (dito_conf == dito)) return; /* set DITO, MDAT, DETO and enable DevSlp, need to stop engine first */ rc = hpriv->stop_engine(ap); if (rc) return; /* 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; } /* Make dito, mdat, deto bits to 0s */ devslp &= ~GENMASK_ULL(24, 2); 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; 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 = hpriv->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_info(ap->host->dev, "FBS is enabled\n"); pp->fbs_enabled = true; pp->fbs_last_dev = -1; /* initialization */ } else dev_err(ap->host->dev, "Failed to enable FBS\n"); 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; 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 = hpriv->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_err(ap->host->dev, "Failed to disable FBS\n"); else { dev_info(ap->host->dev, "FBS is disabled\n"); pp->fbs_enabled = false; } hpriv->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; /* * 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 (!ata_port_is_frozen(ap)) 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; /* see comment above in ahci_pmp_attach() */ if (!ata_port_is_frozen(ap)) writel(pp->intr_mask, port_mmio + PORT_IRQ_MASK); } int ahci_port_resume(struct ata_port *ap) { ahci_rpm_get_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; } EXPORT_SYMBOL_GPL(ahci_port_resume); #ifdef CONFIG_PM static void ahci_handle_s2idle(struct ata_port *ap) { void __iomem *port_mmio = ahci_port_base(ap); u32 devslp; if (pm_suspend_via_firmware()) return; devslp = readl(port_mmio + PORT_DEVSLP); if ((devslp & PORT_DEVSLP_ADSE)) ata_msleep(ap, devslp_idle_timeout); } 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_err(ap, "%s (%d)\n", emsg, rc); ata_port_freeze(ap); } if (acpi_storage_d3(ap->host->dev)) ahci_handle_s2idle(ap); ahci_rpm_put_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; 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); u32 cmd = readl(port_mmio + PORT_CMD); if (cmd & PORT_CMD_FBSCP) pp->fbs_supported = true; else if (hpriv->flags & AHCI_HFLAG_YES_FBS) { dev_info(dev, "port %d can do FBS, forcing FBSCP\n", ap->port_no); pp->fbs_supported = true; } else dev_warn(dev, "port %d is not capable of FBS\n", ap->port_no); } 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; /* * 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; /* * 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 */ return ahci_port_resume(ap); } static void ahci_port_stop(struct ata_port *ap) { const char *emsg = NULL; struct ahci_host_priv *hpriv = ap->host->private_data; void __iomem *host_mmio = hpriv->mmio; int rc; /* de-initialize port */ rc = ahci_deinit_port(ap, &emsg); if (rc) ata_port_warn(ap, "%s (%d)\n", emsg, rc); /* * Clear GHC.IS to prevent stuck INTx after disabling MSI and * re-enabling INTx. */ writel(1 << ap->port_no, host_mmio + HOST_IRQ_STAT); ahci_rpm_put_port(ap); } void ahci_print_info(struct ata_host *host, const char *scc_s) { struct ahci_host_priv *hpriv = host->private_data; u32 vers, cap, cap2, impl, speed; const char *speed_s; vers = hpriv->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 vers %02x%02x.%02x%02x, " "%u command slots, %s Gbps, %s mode\n" , (vers >> 24) & 0xff, (vers >> 16) & 0xff, (vers >> 8) & 0xff, vers & 0xff, ((cap >> 8) & 0x1f) + 1, speed_s, scc_s); dev_info(host->dev, "%u/%u ports implemented (port mask 0x%x)\n" , hweight32(impl), (cap & 0x1f) + 1, impl); 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%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_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 " : "" ); } 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; if (messages) { /* store em_loc */ hpriv->em_loc = ((em_loc >> 16) * 4); hpriv->em_buf_sz = ((em_loc & 0xff) * 4); hpriv->em_msg_type = messages; pi->flags |= ATA_FLAG_EM; if (!(em_ctl & EM_CTL_ALHD)) pi->flags |= ATA_FLAG_SW_ACTIVITY; } } EXPORT_SYMBOL_GPL(ahci_set_em_messages); static int ahci_host_activate_multi_irqs(struct ata_host *host, const struct scsi_host_template *sht) { struct ahci_host_priv *hpriv = host->private_data; int i, rc; rc = ata_host_start(host); if (rc) return rc; /* * Requests IRQs according to AHCI-1.1 when multiple MSIs were * allocated. That is one MSI per port, starting from @irq. */ for (i = 0; i < host->n_ports; i++) { struct ahci_port_priv *pp = host->ports[i]->private_data; int irq = hpriv->get_irq_vector(host, i); /* Do not receive interrupts sent by dummy ports */ if (!pp) { disable_irq(irq); continue; } rc = devm_request_irq(host->dev, irq, ahci_multi_irqs_intr_hard, 0, pp->irq_desc, host->ports[i]); if (rc) return rc; ata_port_desc_misc(host->ports[i], irq); } return ata_host_register(host, sht); } /** * ahci_host_activate - start AHCI host, request IRQs and register it * @host: target ATA host * @sht: scsi_host_template to use when registering the host * * LOCKING: * Inherited from calling layer (may sleep). * * RETURNS: * 0 on success, -errno otherwise. */ int ahci_host_activate(struct ata_host *host, const struct scsi_host_template *sht) { struct ahci_host_priv *hpriv = host->private_data; int irq = hpriv->irq; int rc; if (hpriv->flags & AHCI_HFLAG_MULTI_MSI) { if (hpriv->irq_handler && hpriv->irq_handler != ahci_single_level_irq_intr) dev_warn(host->dev, "both AHCI_HFLAG_MULTI_MSI flag set and custom irq handler implemented\n"); if (!hpriv->get_irq_vector) { dev_err(host->dev, "AHCI_HFLAG_MULTI_MSI requires ->get_irq_vector!\n"); return -EIO; } rc = ahci_host_activate_multi_irqs(host, sht); } else { rc = ata_host_activate(host, irq, hpriv->irq_handler, IRQF_SHARED, sht); } return rc; } EXPORT_SYMBOL_GPL(ahci_host_activate); MODULE_AUTHOR("Jeff Garzik"); MODULE_DESCRIPTION("Common AHCI SATA low-level routines"); MODULE_LICENSE("GPL");
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