Merge branch 'for-3.12' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata

Pull libata changes from Tejun Heo:
 "Two interesting changes.

   - libata acpi handling has been restructured so that the association
     between ata devices and ACPI handles are less convoluted.  This
     change shouldn't change visible behavior.

   - Queued TRIM support, which enables sending TRIM to the device
     without draining in-flight RW commands, is added.  Currently only
     enabled for ahci (and likely to stay that way for the foreseeable
     future).

  Other changes are driver-specific updates / fixes"

* 'for-3.12' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata:
  libata: bugfix: Remove __le32 in ata_tf_to_fis()
  libata: acpi: Remove ata_dev_acpi_handle stub in libata.h
  libata: Add support for queued DSM TRIM
  libata: Add support for SEND/RECEIVE FPDMA QUEUED
  libata: Add H2D FIS "auxiliary" port flag
  libata: Populate host-to-device FIS "auxiliary" field
  ata: acpi: rework the ata acpi bind support
  sata, highbank: send extra clock cycles in SGPIO patterns
  sata, highbank: set tx_atten override bits
  devicetree: create a separate binding description for sata_highbank
  drivers/ata/sata_rcar.c: simplify use of devm_ioremap_resource
  sata highbank: enable 64-bit DMA mask when using LPAE
  ata: pata_samsung_cf: add missing __iomem annotation
  ata: pata_arasan: Staticize local symbols
  sata_mv: Remove unneeded CONFIG_HAVE_CLK ifdefs
  ata: use dev_get_platdata()
  sata_mv: Remove unneeded forward declaration
  libata: acpi: remove dead code for ata_acpi_(un)bind
  libata: move 'struct ata_taskfile' and friends from ata.h to libata.h

1 files changed, 79 insertions, 199 deletions

diff --git a/drivers/ata/libata-acpi.c b/drivers/ata/libata-acpi.c
index da8170dfc90f..4ba8b0405572 100644
--- a/drivers/ata/libata-acpi.c
+++ b/drivers/ata/libata-acpi.c
@@ -34,14 +34,6 @@ struct ata_acpi_gtf {
         u8      tf[REGS_PER_GTF];       /* regs. 0x1f1 - 0x1f7 */
 } __packed;
 
-/*
- *      Helper - belongs in the PCI layer somewhere eventually
- */
-static int is_pci_dev(struct device *dev)
-{
-        return (dev->bus == &pci_bus_type);
-}
-
 static void ata_acpi_clear_gtf(struct ata_device *dev)
 {
         kfree(dev->gtf_cache);
@@ -49,47 +41,18 @@ static void ata_acpi_clear_gtf(struct ata_device *dev)
 }
 
 /**
- * ata_ap_acpi_handle - provide the acpi_handle for an ata_port
- * @ap: the acpi_handle returned will correspond to this port
- *
- * Returns the acpi_handle for the ACPI namespace object corresponding to
- * the ata_port passed into the function, or NULL if no such object exists
- */
-acpi_handle ata_ap_acpi_handle(struct ata_port *ap)
-{
-        if (ap->flags & ATA_FLAG_ACPI_SATA)
-                return NULL;
-
-        return ap->scsi_host ?
-                DEVICE_ACPI_HANDLE(&ap->scsi_host->shost_gendev) : NULL;
-}
-EXPORT_SYMBOL(ata_ap_acpi_handle);
-
-/**
  * ata_dev_acpi_handle - provide the acpi_handle for an ata_device
- * @dev: the acpi_device returned will correspond to this port
+ * @dev: the acpi_handle returned will correspond to this device
  *
  * Returns the acpi_handle for the ACPI namespace object corresponding to
  * the ata_device passed into the function, or NULL if no such object exists
+ * or ACPI is disabled for this device due to consecutive errors.
  */
 acpi_handle ata_dev_acpi_handle(struct ata_device *dev)
 {
-        acpi_integer adr;
-        struct ata_port *ap = dev->link->ap;
-
-        if (libata_noacpi || dev->flags & ATA_DFLAG_ACPI_DISABLED)
-                return NULL;
-
-        if (ap->flags & ATA_FLAG_ACPI_SATA) {
-                if (!sata_pmp_attached(ap))
-                        adr = SATA_ADR(ap->port_no, NO_PORT_MULT);
-                else
-                        adr = SATA_ADR(ap->port_no, dev->link->pmp);
-                return acpi_get_child(DEVICE_ACPI_HANDLE(ap->host->dev), adr);
-        } else
-                return acpi_get_child(ata_ap_acpi_handle(ap), dev->devno);
+        return dev->flags & ATA_DFLAG_ACPI_DISABLED ?
+                        NULL : ACPI_HANDLE(&dev->tdev);
 }
-EXPORT_SYMBOL(ata_dev_acpi_handle);
 
 /* @ap and @dev are the same as ata_acpi_handle_hotplug() */
 static void ata_acpi_detach_device(struct ata_port *ap, struct ata_device *dev)
@@ -156,10 +119,8 @@ static void ata_acpi_handle_hotplug(struct ata_port *ap, struct ata_device *dev,
 
         spin_unlock_irqrestore(ap->lock, flags);
 
-        if (wait) {
+        if (wait)
                 ata_port_wait_eh(ap);
-                flush_work(&ap->hotplug_task.work);
-        }
 }
 
 static void ata_acpi_dev_notify_dock(acpi_handle handle, u32 event, void *data)
@@ -216,37 +177,55 @@ static const struct acpi_dock_ops ata_acpi_ap_dock_ops = {
         .uevent = ata_acpi_ap_uevent,
 };
 
-void ata_acpi_hotplug_init(struct ata_host *host)
+/* bind acpi handle to pata port */
+void ata_acpi_bind_port(struct ata_port *ap)
 {
-        int i;
+        acpi_handle host_handle = ACPI_HANDLE(ap->host->dev);
 
-        for (i = 0; i < host->n_ports; i++) {
-                struct ata_port *ap = host->ports[i];
-                acpi_handle handle;
-                struct ata_device *dev;
+        if (libata_noacpi || ap->flags & ATA_FLAG_ACPI_SATA || !host_handle)
+                return;
 
-                if (!ap)
-                        continue;
+        ACPI_HANDLE_SET(&ap->tdev, acpi_get_child(host_handle, ap->port_no));
 
-                handle = ata_ap_acpi_handle(ap);
-                if (handle) {
-                        /* we might be on a docking station */
-                        register_hotplug_dock_device(handle,
-                                                     &ata_acpi_ap_dock_ops, ap,
-                                                     NULL, NULL);
-                }
+        if (ata_acpi_gtm(ap, &ap->__acpi_init_gtm) == 0)
+                ap->pflags |= ATA_PFLAG_INIT_GTM_VALID;
 
-                ata_for_each_dev(dev, &ap->link, ALL) {
-                        handle = ata_dev_acpi_handle(dev);
-                        if (!handle)
-                                continue;
+        /* we might be on a docking station */
+        register_hotplug_dock_device(ACPI_HANDLE(&ap->tdev),
+                                     &ata_acpi_ap_dock_ops, ap, NULL, NULL);
+}
 
-                        /* we might be on a docking station */
-                        register_hotplug_dock_device(handle,
-                                                     &ata_acpi_dev_dock_ops,
-                                                     dev, NULL, NULL);
-                }
+void ata_acpi_bind_dev(struct ata_device *dev)
+{
+        struct ata_port *ap = dev->link->ap;
+        acpi_handle port_handle = ACPI_HANDLE(&ap->tdev);
+        acpi_handle host_handle = ACPI_HANDLE(ap->host->dev);
+        acpi_handle parent_handle;
+        u64 adr;
+
+        /*
+         * For both sata/pata devices, host handle is required.
+         * For pata device, port handle is also required.
+         */
+        if (libata_noacpi || !host_handle ||
+                        (!(ap->flags & ATA_FLAG_ACPI_SATA) && !port_handle))
+                return;
+
+        if (ap->flags & ATA_FLAG_ACPI_SATA) {
+                if (!sata_pmp_attached(ap))
+                        adr = SATA_ADR(ap->port_no, NO_PORT_MULT);
+                else
+                        adr = SATA_ADR(ap->port_no, dev->link->pmp);
+                parent_handle = host_handle;
+        } else {
+                adr = dev->devno;
+                parent_handle = port_handle;
         }
+
+        ACPI_HANDLE_SET(&dev->tdev, acpi_get_child(parent_handle, adr));
+
+        register_hotplug_dock_device(ata_dev_acpi_handle(dev),
+                                     &ata_acpi_dev_dock_ops, dev, NULL, NULL);
 }
 
 /**
@@ -270,18 +249,34 @@ void ata_acpi_dissociate(struct ata_host *host)
                 struct ata_port *ap = host->ports[i];
                 const struct ata_acpi_gtm *gtm = ata_acpi_init_gtm(ap);
 
-                if (ata_ap_acpi_handle(ap) && gtm)
+                if (ACPI_HANDLE(&ap->tdev) && gtm)
                         ata_acpi_stm(ap, gtm);
         }
 }
 
-static int __ata_acpi_gtm(struct ata_port *ap, acpi_handle handle,
-                          struct ata_acpi_gtm *gtm)
+/**
+ * ata_acpi_gtm - execute _GTM
+ * @ap: target ATA port
+ * @gtm: out parameter for _GTM result
+ *
+ * Evaluate _GTM and store the result in @gtm.
+ *
+ * LOCKING:
+ * EH context.
+ *
+ * RETURNS:
+ * 0 on success, -ENOENT if _GTM doesn't exist, -errno on failure.
+ */
+int ata_acpi_gtm(struct ata_port *ap, struct ata_acpi_gtm *gtm)
 {
         struct acpi_buffer output = { .length = ACPI_ALLOCATE_BUFFER };
         union acpi_object *out_obj;
         acpi_status status;
         int rc = 0;
+        acpi_handle handle = ACPI_HANDLE(&ap->tdev);
+
+        if (!handle)
+                return -EINVAL;
 
         status = acpi_evaluate_object(handle, "_GTM", NULL, &output);
 
@@ -317,27 +312,6 @@ static int __ata_acpi_gtm(struct ata_port *ap, acpi_handle handle,
         return rc;
 }
 
-/**
- * ata_acpi_gtm - execute _GTM
- * @ap: target ATA port
- * @gtm: out parameter for _GTM result
- *
- * Evaluate _GTM and store the result in @gtm.
- *
- * LOCKING:
- * EH context.
- *
- * RETURNS:
- * 0 on success, -ENOENT if _GTM doesn't exist, -errno on failure.
- */
-int ata_acpi_gtm(struct ata_port *ap, struct ata_acpi_gtm *gtm)
-{
-        if (ata_ap_acpi_handle(ap))
-                return __ata_acpi_gtm(ap, ata_ap_acpi_handle(ap), gtm);
-        else
-                return -EINVAL;
-}
-
 EXPORT_SYMBOL_GPL(ata_acpi_gtm);
 
 /**
@@ -374,8 +348,8 @@ int ata_acpi_stm(struct ata_port *ap, const struct ata_acpi_gtm *stm)
         input.count = 3;
         input.pointer = in_params;
 
-        status = acpi_evaluate_object(ata_ap_acpi_handle(ap), "_STM", &input,
-                                      NULL);
+        status = acpi_evaluate_object(ACPI_HANDLE(&ap->tdev), "_STM",
+                                      &input, NULL);
 
         if (status == AE_NOT_FOUND)
                 return -ENOENT;
@@ -850,7 +824,7 @@ void ata_acpi_on_resume(struct ata_port *ap)
         const struct ata_acpi_gtm *gtm = ata_acpi_init_gtm(ap);
         struct ata_device *dev;
 
-        if (ata_ap_acpi_handle(ap) && gtm) {
+        if (ACPI_HANDLE(&ap->tdev) && gtm) {
                 /* _GTM valid */
 
                 /* restore timing parameters */
@@ -894,8 +868,7 @@ static int ata_acpi_choose_suspend_state(struct ata_device *dev, bool runtime)
                 d_max_in = ACPI_STATE_D3_HOT;
 
 out:
-        return acpi_pm_device_sleep_state(&dev->sdev->sdev_gendev,
-                                          NULL, d_max_in);
+        return acpi_pm_device_sleep_state(&dev->tdev, NULL, d_max_in);
 }
 
 static void sata_acpi_set_state(struct ata_port *ap, pm_message_t state)
@@ -932,7 +905,7 @@ static void pata_acpi_set_state(struct ata_port *ap, pm_message_t state)
         struct ata_device *dev;
         acpi_handle port_handle;
 
-        port_handle = ata_ap_acpi_handle(ap);
+        port_handle = ACPI_HANDLE(&ap->tdev);
         if (!port_handle)
                 return;
 
@@ -1063,109 +1036,16 @@ void ata_acpi_on_disable(struct ata_device *dev)
         ata_acpi_clear_gtf(dev);
 }
 
-static int compat_pci_ata(struct ata_port *ap)
-{
-        struct device *dev = ap->tdev.parent;
-        struct pci_dev *pdev;
-
-        if (!is_pci_dev(dev))
-                return 0;
-
-        pdev = to_pci_dev(dev);
-
-        if ((pdev->class >> 8) != PCI_CLASS_STORAGE_SATA &&
-            (pdev->class >> 8) != PCI_CLASS_STORAGE_IDE)
-                return 0;
-
-        return 1;
-}
-
-static int ata_acpi_bind_host(struct ata_port *ap, acpi_handle *handle)
-{
-        if (libata_noacpi || ap->flags & ATA_FLAG_ACPI_SATA)
-                return -ENODEV;
-
-        *handle = acpi_get_child(DEVICE_ACPI_HANDLE(ap->tdev.parent),
-                        ap->port_no);
-
-        if (!*handle)
-                return -ENODEV;
-
-        if (__ata_acpi_gtm(ap, *handle, &ap->__acpi_init_gtm) == 0)
-                ap->pflags |= ATA_PFLAG_INIT_GTM_VALID;
-
-        return 0;
-}
-
-static int ata_acpi_bind_device(struct ata_port *ap, struct scsi_device *sdev,
-                                acpi_handle *handle)
-{
-        struct ata_device *ata_dev;
-
-        if (ap->flags & ATA_FLAG_ACPI_SATA) {
-                if (!sata_pmp_attached(ap))
-                        ata_dev = &ap->link.device[sdev->id];
-                else
-                        ata_dev = &ap->pmp_link[sdev->channel].device[sdev->id];
-        }
-        else {
-                ata_dev = &ap->link.device[sdev->id];
-        }
-
-        *handle = ata_dev_acpi_handle(ata_dev);
-
-        if (!*handle)
-                return -ENODEV;
-
-        return 0;
-}
-
-static int is_ata_port(const struct device *dev)
-{
-        return dev->type == &ata_port_type;
-}
-
-static struct ata_port *dev_to_ata_port(struct device *dev)
-{
-        while (!is_ata_port(dev)) {
-                if (!dev->parent)
-                        return NULL;
-                dev = dev->parent;
-        }
-        return to_ata_port(dev);
-}
-
-static int ata_acpi_find_device(struct device *dev, acpi_handle *handle)
-{
-        struct ata_port *ap = dev_to_ata_port(dev);
-
-        if (!ap)
-                return -ENODEV;
-
-        if (!compat_pci_ata(ap))
-                return -ENODEV;
-
-        if (scsi_is_host_device(dev))
-                return ata_acpi_bind_host(ap, handle);
-        else if (scsi_is_sdev_device(dev)) {
-                struct scsi_device *sdev = to_scsi_device(dev);
-
-                return ata_acpi_bind_device(ap, sdev, handle);
-        } else
-                return -ENODEV;
-}
-
-static struct acpi_bus_type ata_acpi_bus = {
-        .name = "ATA",
-        .find_device = ata_acpi_find_device,
-};
-
-int ata_acpi_register(void)
+void ata_scsi_acpi_bind(struct ata_device *dev)
 {
-        return scsi_register_acpi_bus_type(&ata_acpi_bus);
+        acpi_handle handle = ata_dev_acpi_handle(dev);
+        if (handle)
+                acpi_dev_pm_add_dependent(handle, &dev->sdev->sdev_gendev);
 }
 
-void ata_acpi_unregister(void)
+void ata_scsi_acpi_unbind(struct ata_device *dev)
 {
-        scsi_unregister_acpi_bus_type(&ata_acpi_bus);
+        acpi_handle handle = ata_dev_acpi_handle(dev);
+        if (handle)
+                acpi_dev_pm_remove_dependent(handle, &dev->sdev->sdev_gendev);
 }