[SCSI] sem2mutex: scsi_transport_spi.c

[linux-2.6] / drivers / scsi / scsi_transport_sas.c

diff --git a/drivers/scsi/scsi_transport_sas.c b/drivers/scsi/scsi_transport_sas.c
index f5618c1116f43f8d122a95def3322e3f86c5f4b7..e950435a11d8d6bc264e04e16b354dae07d7a6ad 100644 (file)
--- a/drivers/scsi/scsi_transport_sas.c
+++ b/drivers/scsi/scsi_transport_sas.c
@@ -26,6 +26,8 @@
 #include <linux/init.h>
 #include <linux/module.h>
 #include <linux/err.h>
+#include <linux/slab.h>
+#include <linux/string.h>
 
 #include <scsi/scsi_device.h>
 #include <scsi/scsi_host.h>
@@ -34,7 +36,7 @@
 
 
 #define SAS_HOST_ATTRS         0
-#define SAS_PORT_ATTRS         15
+#define SAS_PORT_ATTRS         17
 #define SAS_RPORT_ATTRS                5
 
 struct sas_internal {
@@ -289,9 +291,39 @@ show_sas_device_type(struct class_device *cdev, char *buf)
                return snprintf(buf, 20, "none\n");
        return get_sas_device_type_names(phy->identify.device_type, buf);
 }
-
 static CLASS_DEVICE_ATTR(device_type, S_IRUGO, show_sas_device_type, NULL);
 
+static ssize_t do_sas_phy_reset(struct class_device *cdev,
+               size_t count, int hard_reset)
+{
+       struct sas_phy *phy = transport_class_to_phy(cdev);
+       struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
+       struct sas_internal *i = to_sas_internal(shost->transportt);
+       int error;
+
+       if (!phy->local_attached)
+               return -EINVAL;
+
+       error = i->f->phy_reset(phy, hard_reset);
+       if (error)
+               return error;
+       return count;
+};
+
+static ssize_t store_sas_link_reset(struct class_device *cdev,
+               const char *buf, size_t count)
+{
+       return do_sas_phy_reset(cdev, count, 0);
+}
+static CLASS_DEVICE_ATTR(link_reset, S_IWUSR, NULL, store_sas_link_reset);
+
+static ssize_t store_sas_hard_reset(struct class_device *cdev,
+               const char *buf, size_t count)
+{
+       return do_sas_phy_reset(cdev, count, 1);
+}
+static CLASS_DEVICE_ATTR(hard_reset, S_IWUSR, NULL, store_sas_hard_reset);
+
 sas_phy_protocol_attr(identify.initiator_port_protocols,
                initiator_port_protocols);
 sas_phy_protocol_attr(identify.target_port_protocols,
@@ -655,7 +687,17 @@ sas_rphy_delete(struct sas_rphy *rphy)
        struct Scsi_Host *shost = dev_to_shost(parent->dev.parent);
        struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
 
-       scsi_remove_target(dev);
+       switch (rphy->identify.device_type) {
+       case SAS_END_DEVICE:
+               scsi_remove_target(dev);
+               break;
+       case SAS_EDGE_EXPANDER_DEVICE:
+       case SAS_FANOUT_EXPANDER_DEVICE:
+               device_for_each_child(dev, NULL, do_sas_phy_delete);
+               break;
+       default:
+               break;
+       }
 
        transport_remove_device(dev);
        device_del(dev);
@@ -665,6 +707,8 @@ sas_rphy_delete(struct sas_rphy *rphy)
        list_del(&rphy->list);
        spin_unlock(&sas_host->lock);
 
+       parent->rphy = NULL;
+
        put_device(&parent->dev);
 }
 EXPORT_SYMBOL(sas_rphy_delete);
@@ -725,6 +769,13 @@ static struct device *sas_target_parent(struct Scsi_Host *shost,
         i->phy_attrs[count] = &i->private_phy_attrs[count];            \
        count++
 
+#define SETUP_PORT_ATTRIBUTE_WRONLY(field)                             \
+       i->private_phy_attrs[count] = class_device_attr_##field;        \
+       i->private_phy_attrs[count].attr.mode = S_IWUGO;                \
+       i->private_phy_attrs[count].show = NULL;                        \
+       i->phy_attrs[count] = &i->private_phy_attrs[count];             \
+       count++
+
 
 /**
  * sas_attach_transport  --  instantiate SAS transport template
@@ -781,6 +832,8 @@ sas_attach_transport(struct sas_function_template *ft)
        SETUP_PORT_ATTRIBUTE(running_disparity_error_count);
        SETUP_PORT_ATTRIBUTE(loss_of_dword_sync_count);
        SETUP_PORT_ATTRIBUTE(phy_reset_problem_count);
+       SETUP_PORT_ATTRIBUTE_WRONLY(link_reset);
+       SETUP_PORT_ATTRIBUTE_WRONLY(hard_reset);
        i->phy_attrs[count] = NULL;
 
        count = 0;