libata: migrate ACPI code over to new bindings

Now that we have the ability to directly glue the ACPI namespace to the
driver model in libata, we don't need the custom code to handle the same
thing. Remove it and migrate the functions over to the new code.

Signed-off-by: Matthew Garrett <mjg@redhat.com>
Signed-off-by: Holger Macht <holger@homac.de>
Signed-off-by: Lin Ming <ming.m.lin@intel.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

1 files changed, 36 insertions, 125 deletions

diff --git a/drivers/ata/libata-acpi.c b/drivers/ata/libata-acpi.c
index b3025a7d71e3..c6f0101fd253 100644
--- a/drivers/ata/libata-acpi.c
+++ b/drivers/ata/libata-acpi.c
@@ -47,7 +47,14 @@ static void ata_acpi_clear_gtf(struct ata_device *dev)
         dev->gtf_cache = NULL;
 }
 
-static acpi_handle ap_acpi_handle(struct ata_port *ap)
+/**
+ * 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;
@@ -64,8 +71,16 @@ static acpi_handle ap_acpi_handle(struct ata_port *ap)
                 return acpi_get_child(DEVICE_ACPI_HANDLE(ap->host->dev),
                                 ap->port_no);
 }
+EXPORT_SYMBOL(ata_ap_acpi_handle);
 
-static acpi_handle dev_acpi_handle(struct ata_device *dev)
+/**
+ * ata_dev_acpi_handle - provide the acpi_handle for an ata_device
+ * @dev: the acpi_device returned will correspond to this port
+ *
+ * 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
+ */
+acpi_handle ata_dev_acpi_handle(struct ata_device *dev)
 {
         acpi_integer adr;
         struct ata_port *ap = dev->link->ap;
@@ -77,66 +92,9 @@ static acpi_handle dev_acpi_handle(struct ata_device *dev)
                         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(ap_acpi_handle(ap), dev->devno);
-}
-
-/**
- * ata_acpi_associate_sata_port - associate SATA port with ACPI objects
- * @ap: target SATA port
- *
- * Look up ACPI objects associated with @ap and initialize acpi_handle
- * fields of @ap, the port and devices accordingly.
- *
- * LOCKING:
- * EH context.
- *
- * RETURNS:
- * 0 on success, -errno on failure.
- */
-void ata_acpi_associate_sata_port(struct ata_port *ap)
-{
-        WARN_ON(!(ap->flags & ATA_FLAG_ACPI_SATA));
-
-        if (!sata_pmp_attached(ap)) {
-                u64 adr = SATA_ADR(ap->port_no, NO_PORT_MULT);
-
-                ap->link.device->acpi_handle =
-                        acpi_get_child(ap->host->acpi_handle, adr);
-        } else {
-                struct ata_link *link;
-
-                ap->link.device->acpi_handle = NULL;
-
-                ata_for_each_link(link, ap, EDGE) {
-                        u64 adr = SATA_ADR(ap->port_no, link->pmp);
-
-                        link->device->acpi_handle =
-                                acpi_get_child(ap->host->acpi_handle, adr);
-                }
-        }
-}
-
-static void ata_acpi_associate_ide_port(struct ata_port *ap)
-{
-        int max_devices, i;
-
-        ap->acpi_handle = acpi_get_child(ap->host->acpi_handle, ap->port_no);
-        if (!ap->acpi_handle)
-                return;
-
-        max_devices = 1;
-        if (ap->flags & ATA_FLAG_SLAVE_POSS)
-                max_devices++;
-
-        for (i = 0; i < max_devices; i++) {
-                struct ata_device *dev = &ap->link.device[i];
-
-                dev->acpi_handle = acpi_get_child(ap->acpi_handle, i);
-        }
-
-        if (ata_acpi_gtm(ap, &ap->__acpi_init_gtm) == 0)
-                ap->pflags |= ATA_PFLAG_INIT_GTM_VALID;
+                return acpi_get_child(ata_ap_acpi_handle(ap), dev->devno);
 }
+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)
@@ -262,56 +220,6 @@ static const struct acpi_dock_ops ata_acpi_ap_dock_ops = {
 };
 
 /**
- * ata_acpi_associate - associate ATA host with ACPI objects
- * @host: target ATA host
- *
- * Look up ACPI objects associated with @host and initialize
- * acpi_handle fields of @host, its ports and devices accordingly.
- *
- * LOCKING:
- * EH context.
- *
- * RETURNS:
- * 0 on success, -errno on failure.
- */
-void ata_acpi_associate(struct ata_host *host)
-{
-        int i, j;
-
-        if (!is_pci_dev(host->dev) || libata_noacpi)
-                return;
-
-        host->acpi_handle = DEVICE_ACPI_HANDLE(host->dev);
-        if (!host->acpi_handle)
-                return;
-
-        for (i = 0; i < host->n_ports; i++) {
-                struct ata_port *ap = host->ports[i];
-
-                if (host->ports[0]->flags & ATA_FLAG_ACPI_SATA)
-                        ata_acpi_associate_sata_port(ap);
-                else
-                        ata_acpi_associate_ide_port(ap);
-
-                if (ap->acpi_handle) {
-                        /* we might be on a docking station */
-                        register_hotplug_dock_device(ap->acpi_handle,
-                                             &ata_acpi_ap_dock_ops, ap);
-                }
-
-                for (j = 0; j < ata_link_max_devices(&ap->link); j++) {
-                        struct ata_device *dev = &ap->link.device[j];
-
-                        if (dev->acpi_handle) {
-                                /* we might be on a docking station */
-                                register_hotplug_dock_device(dev->acpi_handle,
-                                             &ata_acpi_dev_dock_ops, dev);
-                        }
-                }
-        }
-}
-
-/**
  * ata_acpi_dissociate - dissociate ATA host from ACPI objects
  * @host: target ATA host
  *
@@ -332,7 +240,7 @@ 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 (ap->acpi_handle && gtm)
+                if (ata_ap_acpi_handle(ap) && gtm)
                         ata_acpi_stm(ap, gtm);
         }
 }
@@ -357,7 +265,8 @@ int ata_acpi_gtm(struct ata_port *ap, struct ata_acpi_gtm *gtm)
         acpi_status status;
         int rc = 0;
 
-        status = acpi_evaluate_object(ap->acpi_handle, "_GTM", NULL, &output);
+        status = acpi_evaluate_object(ata_ap_acpi_handle(ap), "_GTM", NULL,
+                                      &output);
 
         rc = -ENOENT;
         if (status == AE_NOT_FOUND)
@@ -427,7 +336,8 @@ 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(ap->acpi_handle, "_STM", &input, NULL);
+        status = acpi_evaluate_object(ata_ap_acpi_handle(ap), "_STM", &input,
+                                      NULL);
 
         if (status == AE_NOT_FOUND)
                 return -ENOENT;
@@ -484,7 +394,8 @@ static int ata_dev_get_GTF(struct ata_device *dev, struct ata_acpi_gtf **gtf)
                             __func__, ap->port_no);
 
         /* _GTF has no input parameters */
-        status = acpi_evaluate_object(dev->acpi_handle, "_GTF", NULL, &output);
+        status = acpi_evaluate_object(ata_dev_acpi_handle(dev), "_GTF", NULL,
+                                      &output);
         out_obj = dev->gtf_cache = output.pointer;
 
         if (ACPI_FAILURE(status)) {
@@ -850,7 +761,8 @@ static int ata_acpi_push_id(struct ata_device *dev)
 
         /* It's OK for _SDD to be missing too. */
         swap_buf_le16(dev->id, ATA_ID_WORDS);
-        status = acpi_evaluate_object(dev->acpi_handle, "_SDD", &input, NULL);
+        status = acpi_evaluate_object(ata_dev_acpi_handle(dev), "_SDD", &input,
+                                      NULL);
         swap_buf_le16(dev->id, ATA_ID_WORDS);
 
         if (status == AE_NOT_FOUND)
@@ -900,7 +812,7 @@ 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 (ap->acpi_handle && gtm) {
+        if (ata_ap_acpi_handle(ap) && gtm) {
                 /* _GTM valid */
 
                 /* restore timing parameters */
@@ -941,22 +853,22 @@ void ata_acpi_set_state(struct ata_port *ap, pm_message_t state)
 {
         struct ata_device *dev;
 
-        if (!ap->acpi_handle || (ap->flags & ATA_FLAG_ACPI_SATA))
+        if (!ata_ap_acpi_handle(ap) || (ap->flags & ATA_FLAG_ACPI_SATA))
                 return;
 
         /* channel first and then drives for power on and vica versa
            for power off */
         if (state.event == PM_EVENT_ON)
-                acpi_bus_set_power(ap->acpi_handle, ACPI_STATE_D0);
+                acpi_bus_set_power(ata_ap_acpi_handle(ap), ACPI_STATE_D0);
 
         ata_for_each_dev(dev, &ap->link, ENABLED) {
-                if (dev->acpi_handle)
-                        acpi_bus_set_power(dev->acpi_handle,
+                if (ata_dev_acpi_handle(dev))
+                        acpi_bus_set_power(ata_dev_acpi_handle(dev),
                                 state.event == PM_EVENT_ON ?
                                         ACPI_STATE_D0 : ACPI_STATE_D3);
         }
         if (state.event != PM_EVENT_ON)
-                acpi_bus_set_power(ap->acpi_handle, ACPI_STATE_D3);
+                acpi_bus_set_power(ata_ap_acpi_handle(ap), ACPI_STATE_D3);
 }
 
 /**
@@ -981,7 +893,7 @@ int ata_acpi_on_devcfg(struct ata_device *dev)
         int nr_executed = 0;
         int rc;
 
-        if (!dev->acpi_handle)
+        if (!ata_dev_acpi_handle(dev))
                 return 0;
 
         /* do we need to do _GTF? */
@@ -1027,7 +939,6 @@ int ata_acpi_on_devcfg(struct ata_device *dev)
         }
 
         ata_dev_warn(dev, "ACPI: failed the second time, disabled\n");
-        dev->acpi_handle = NULL;
 
         /* We can safely continue if no _GTF command has been executed
          * and port is not frozen.
@@ -1093,7 +1004,7 @@ static int ata_acpi_bind_device(struct ata_port *ap, struct scsi_device *sdev,
         else
                 ata_dev = &ap->link.device[sdev->id];
 
-        *handle = dev_acpi_handle(ata_dev);
+        *handle = ata_dev_acpi_handle(ata_dev);
 
         if (!*handle)
                 return -ENODEV;