/*
- * Copyright (C) 2005 Dell Inc.
+ * Copyright (C) 2005-2006 Dell Inc.
* Released under GPL v2.
*
* Serial Attached SCSI (SAS) transport class.
#include <linux/slab.h>
#include <linux/string.h>
+#include <scsi/scsi.h>
#include <scsi/scsi_device.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi_transport.h>
#define SAS_HOST_ATTRS 0
#define SAS_PORT_ATTRS 17
-#define SAS_RPORT_ATTRS 5
+#define SAS_RPORT_ATTRS 7
+#define SAS_END_DEV_ATTRS 3
struct sas_internal {
struct scsi_transport_template t;
struct class_device_attribute private_host_attrs[SAS_HOST_ATTRS];
struct class_device_attribute private_phy_attrs[SAS_PORT_ATTRS];
struct class_device_attribute private_rphy_attrs[SAS_RPORT_ATTRS];
+ struct class_device_attribute private_end_dev_attrs[SAS_END_DEV_ATTRS];
struct transport_container phy_attr_cont;
struct transport_container rphy_attr_cont;
+ struct transport_container end_dev_attr_cont;
/*
* The array of null terminated pointers to attributes
struct class_device_attribute *host_attrs[SAS_HOST_ATTRS + 1];
struct class_device_attribute *phy_attrs[SAS_PORT_ATTRS + 1];
struct class_device_attribute *rphy_attrs[SAS_RPORT_ATTRS + 1];
+ struct class_device_attribute *end_dev_attrs[SAS_END_DEV_ATTRS + 1];
};
#define to_sas_internal(tmpl) container_of(tmpl, struct sas_internal, t)
struct sas_host_attrs {
struct list_head rphy_list;
- spinlock_t lock;
+ struct mutex lock;
u32 next_target_id;
};
#define to_sas_host_attrs(host) ((struct sas_host_attrs *)(host)->shost_data)
{ SAS_SATA_SPINUP_HOLD, "Spin-up hold" },
{ SAS_LINK_RATE_1_5_GBPS, "1.5 Gbit" },
{ SAS_LINK_RATE_3_0_GBPS, "3.0 Gbit" },
+ { SAS_LINK_RATE_6_0_GBPS, "6.0 Gbit" },
};
sas_bitfield_name_search(linkspeed, sas_linkspeed_names)
struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
INIT_LIST_HEAD(&sas_host->rphy_list);
- spin_lock_init(&sas_host->lock);
+ mutex_init(&sas_host->lock);
sas_host->next_target_id = 0;
return 0;
}
if (!phy->local_attached) \
return -EINVAL; \
\
- error = i->f->get_linkerrors(phy); \
+ error = i->f->get_linkerrors ? i->f->get_linkerrors(phy) : 0; \
if (error) \
return error; \
return snprintf(buf, 20, "%u\n", phy->field); \
/**
* sas_phy_alloc -- allocates and initialize a SAS PHY structure
* @parent: Parent device
- * @number: Port number
+ * @number: Phy index
*
* Allocates an SAS PHY structure. It will be added in the device tree
* below the device specified by @parent, which has to be either a Scsi_Host
struct Scsi_Host *shost = dev_to_shost(parent);
struct sas_phy *phy;
- phy = kmalloc(sizeof(*phy), GFP_KERNEL);
+ phy = kzalloc(sizeof(*phy), GFP_KERNEL);
if (!phy)
return NULL;
- memset(phy, 0, sizeof(*phy));
get_device(parent);
static SAS_CLASS_DEVICE_ATTR(rphy, device_type, S_IRUGO,
show_sas_rphy_device_type, NULL);
+static ssize_t
+show_sas_rphy_enclosure_identifier(struct class_device *cdev, char *buf)
+{
+ struct sas_rphy *rphy = transport_class_to_rphy(cdev);
+ struct sas_phy *phy = dev_to_phy(rphy->dev.parent);
+ struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
+ struct sas_internal *i = to_sas_internal(shost->transportt);
+ u64 identifier;
+ int error;
+
+ /*
+ * Only devices behind an expander are supported, because the
+ * enclosure identifier is a SMP feature.
+ */
+ if (phy->local_attached)
+ return -EINVAL;
+
+ error = i->f->get_enclosure_identifier(rphy, &identifier);
+ if (error)
+ return error;
+ return sprintf(buf, "0x%llx\n", (unsigned long long)identifier);
+}
+
+static SAS_CLASS_DEVICE_ATTR(rphy, enclosure_identifier, S_IRUGO,
+ show_sas_rphy_enclosure_identifier, NULL);
+
+static ssize_t
+show_sas_rphy_bay_identifier(struct class_device *cdev, char *buf)
+{
+ struct sas_rphy *rphy = transport_class_to_rphy(cdev);
+ struct sas_phy *phy = dev_to_phy(rphy->dev.parent);
+ struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
+ struct sas_internal *i = to_sas_internal(shost->transportt);
+ int val;
+
+ if (phy->local_attached)
+ return -EINVAL;
+
+ val = i->f->get_bay_identifier(rphy);
+ if (val < 0)
+ return val;
+ return sprintf(buf, "%d\n", val);
+}
+
+static SAS_CLASS_DEVICE_ATTR(rphy, bay_identifier, S_IRUGO,
+ show_sas_rphy_bay_identifier, NULL);
+
sas_rphy_protocol_attr(identify.initiator_port_protocols,
initiator_port_protocols);
sas_rphy_protocol_attr(identify.target_port_protocols, target_port_protocols);
unsigned long long);
sas_rphy_simple_attr(identify.phy_identifier, phy_identifier, "%d\n", u8);
+/* only need 8 bytes of data plus header (4 or 8) */
+#define BUF_SIZE 64
+
+int sas_read_port_mode_page(struct scsi_device *sdev)
+{
+ char *buffer = kzalloc(BUF_SIZE, GFP_KERNEL), *msdata;
+ struct sas_rphy *rphy = target_to_rphy(sdev->sdev_target);
+ struct sas_end_device *rdev;
+ struct scsi_mode_data mode_data;
+ int res, error;
+
+ BUG_ON(rphy->identify.device_type != SAS_END_DEVICE);
+
+ rdev = rphy_to_end_device(rphy);
+
+ if (!buffer)
+ return -ENOMEM;
+
+ res = scsi_mode_sense(sdev, 1, 0x19, buffer, BUF_SIZE, 30*HZ, 3,
+ &mode_data, NULL);
+
+ error = -EINVAL;
+ if (!scsi_status_is_good(res))
+ goto out;
+
+ msdata = buffer + mode_data.header_length +
+ mode_data.block_descriptor_length;
+
+ if (msdata - buffer > BUF_SIZE - 8)
+ goto out;
+
+ error = 0;
+
+ rdev->ready_led_meaning = msdata[2] & 0x10 ? 1 : 0;
+ rdev->I_T_nexus_loss_timeout = (msdata[4] << 8) + msdata[5];
+ rdev->initiator_response_timeout = (msdata[6] << 8) + msdata[7];
+
+ out:
+ kfree(buffer);
+ return error;
+}
+EXPORT_SYMBOL(sas_read_port_mode_page);
+
+#define sas_end_dev_show_simple(field, name, format_string, cast) \
+static ssize_t \
+show_sas_end_dev_##name(struct class_device *cdev, char *buf) \
+{ \
+ struct sas_rphy *rphy = transport_class_to_rphy(cdev); \
+ struct sas_end_device *rdev = rphy_to_end_device(rphy); \
+ \
+ return snprintf(buf, 20, format_string, cast rdev->field); \
+}
+
+#define sas_end_dev_simple_attr(field, name, format_string, type) \
+ sas_end_dev_show_simple(field, name, format_string, (type)) \
+static SAS_CLASS_DEVICE_ATTR(end_dev, name, S_IRUGO, \
+ show_sas_end_dev_##name, NULL)
+
+sas_end_dev_simple_attr(ready_led_meaning, ready_led_meaning, "%d\n", int);
+sas_end_dev_simple_attr(I_T_nexus_loss_timeout, I_T_nexus_loss_timeout,
+ "%d\n", int);
+sas_end_dev_simple_attr(initiator_response_timeout, initiator_response_timeout,
+ "%d\n", int);
+
+static DECLARE_TRANSPORT_CLASS(sas_end_dev_class,
+ "sas_end_device", NULL, NULL, NULL);
+
static DECLARE_TRANSPORT_CLASS(sas_rphy_class,
"sas_rphy", NULL, NULL, NULL);
return &i->rphy_attr_cont.ac == cont;
}
+static int sas_end_dev_match(struct attribute_container *cont,
+ struct device *dev)
+{
+ struct Scsi_Host *shost;
+ struct sas_internal *i;
+ struct sas_rphy *rphy;
+
+ if (!scsi_is_sas_rphy(dev))
+ return 0;
+ shost = dev_to_shost(dev->parent->parent);
+ rphy = dev_to_rphy(dev);
+
+ if (!shost->transportt)
+ return 0;
+ if (shost->transportt->host_attrs.ac.class !=
+ &sas_host_class.class)
+ return 0;
+
+ i = to_sas_internal(shost->transportt);
+ return &i->end_dev_attr_cont.ac == cont &&
+ rphy->identify.device_type == SAS_END_DEVICE &&
+ /* FIXME: remove contained eventually */
+ rphy->contained;
+}
+
static void sas_rphy_release(struct device *dev)
{
struct sas_rphy *rphy = dev_to_rphy(dev);
struct Scsi_Host *shost = dev_to_shost(&parent->dev);
struct sas_rphy *rphy;
- rphy = kmalloc(sizeof(*rphy), GFP_KERNEL);
+ rphy = kzalloc(sizeof(*rphy), GFP_KERNEL);
if (!rphy) {
put_device(&parent->dev);
return NULL;
}
- memset(rphy, 0, sizeof(*rphy));
device_initialize(&rphy->dev);
rphy->dev.parent = get_device(&parent->dev);
rphy->dev.release = sas_rphy_release;
- sprintf(rphy->dev.bus_id, "rphy-%d:%d",
- shost->host_no, parent->number);
+ sprintf(rphy->dev.bus_id, "rphy-%d:%d-%d",
+ shost->host_no, parent->port_identifier, parent->number);
transport_setup_device(&rphy->dev);
return rphy;
}
EXPORT_SYMBOL(sas_rphy_alloc);
+/**
+ * sas_end_device_alloc - allocate an rphy for an end device
+ *
+ * Allocates an SAS remote PHY structure, connected to @parent.
+ *
+ * Returns:
+ * SAS PHY allocated or %NULL if the allocation failed.
+ */
+struct sas_rphy *sas_end_device_alloc(struct sas_phy *parent)
+{
+ struct Scsi_Host *shost = dev_to_shost(&parent->dev);
+ struct sas_end_device *rdev;
+
+ rdev = kzalloc(sizeof(*rdev), GFP_KERNEL);
+ if (!rdev) {
+ put_device(&parent->dev);
+ return NULL;
+ }
+
+ device_initialize(&rdev->rphy.dev);
+ rdev->rphy.dev.parent = get_device(&parent->dev);
+ rdev->rphy.dev.release = sas_rphy_release;
+ sprintf(rdev->rphy.dev.bus_id, "rphy-%d:%d-%d",
+ shost->host_no, parent->port_identifier, parent->number);
+ rdev->rphy.identify.device_type = SAS_END_DEVICE;
+ /* FIXME: mark the rphy as being contained in a larger structure */
+ rdev->rphy.contained = 1;
+ transport_setup_device(&rdev->rphy.dev);
+
+ return &rdev->rphy;
+}
+EXPORT_SYMBOL(sas_end_device_alloc);
+
+
/**
* sas_rphy_add -- add a SAS remote PHY to the device hierachy
* @rphy: The remote PHY to be added
transport_add_device(&rphy->dev);
transport_configure_device(&rphy->dev);
- spin_lock(&sas_host->lock);
+ mutex_lock(&sas_host->lock);
list_add_tail(&rphy->list, &sas_host->rphy_list);
if (identify->device_type == SAS_END_DEVICE &&
(identify->target_port_protocols &
rphy->scsi_target_id = sas_host->next_target_id++;
else
rphy->scsi_target_id = -1;
- spin_unlock(&sas_host->lock);
+ mutex_unlock(&sas_host->lock);
if (rphy->scsi_target_id != -1) {
- scsi_scan_target(&rphy->dev, parent->number,
+ scsi_scan_target(&rphy->dev, parent->port_identifier,
rphy->scsi_target_id, ~0, 0);
}
struct Scsi_Host *shost = dev_to_shost(rphy->dev.parent->parent);
struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
- spin_lock(&sas_host->lock);
+ mutex_lock(&sas_host->lock);
list_del(&rphy->list);
- spin_unlock(&sas_host->lock);
+ mutex_unlock(&sas_host->lock);
transport_destroy_device(&rphy->dev);
put_device(rphy->dev.parent);
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);
transport_destroy_device(dev);
- spin_lock(&sas_host->lock);
+ mutex_lock(&sas_host->lock);
list_del(&rphy->list);
- spin_unlock(&sas_host->lock);
+ mutex_unlock(&sas_host->lock);
+
+ parent->rphy = NULL;
put_device(&parent->dev);
}
* SCSI scan helper
*/
-static struct device *sas_target_parent(struct Scsi_Host *shost,
- int channel, uint id)
+static int sas_user_scan(struct Scsi_Host *shost, uint channel,
+ uint id, uint lun)
{
struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
struct sas_rphy *rphy;
- struct device *dev = NULL;
- spin_lock(&sas_host->lock);
+ mutex_lock(&sas_host->lock);
list_for_each_entry(rphy, &sas_host->rphy_list, list) {
struct sas_phy *parent = dev_to_phy(rphy->dev.parent);
- if (parent->number == channel &&
- rphy->scsi_target_id == id)
- dev = &rphy->dev;
+
+ if (rphy->scsi_target_id == -1)
+ continue;
+
+ if ((channel == SCAN_WILD_CARD || channel == parent->port_identifier) &&
+ (id == SCAN_WILD_CARD || id == rphy->scsi_target_id)) {
+ scsi_scan_target(&rphy->dev, parent->port_identifier,
+ rphy->scsi_target_id, lun, 1);
+ }
}
- spin_unlock(&sas_host->lock);
+ mutex_unlock(&sas_host->lock);
- return dev;
+ return 0;
}
* Setup / Teardown code
*/
-#define SETUP_RPORT_ATTRIBUTE(field) \
- i->private_rphy_attrs[count] = class_device_attr_##field; \
- i->private_rphy_attrs[count].attr.mode = S_IRUGO; \
- i->private_rphy_attrs[count].store = NULL; \
- i->rphy_attrs[count] = &i->private_rphy_attrs[count]; \
- count++
+#define SETUP_TEMPLATE(attrb, field, perm, test) \
+ i->private_##attrb[count] = class_device_attr_##field; \
+ i->private_##attrb[count].attr.mode = perm; \
+ i->private_##attrb[count].store = NULL; \
+ i->attrb[count] = &i->private_##attrb[count]; \
+ if (test) \
+ count++
+
+
+#define SETUP_RPORT_ATTRIBUTE(field) \
+ SETUP_TEMPLATE(rphy_attrs, field, S_IRUGO, 1)
+
+#define SETUP_OPTIONAL_RPORT_ATTRIBUTE(field, func) \
+ SETUP_TEMPLATE(rphy_attrs, field, S_IRUGO, i->f->func)
#define SETUP_PORT_ATTRIBUTE(field) \
- i->private_phy_attrs[count] = class_device_attr_##field; \
- i->private_phy_attrs[count].attr.mode = S_IRUGO; \
- i->private_phy_attrs[count].store = NULL; \
- i->phy_attrs[count] = &i->private_phy_attrs[count]; \
- count++
+ SETUP_TEMPLATE(phy_attrs, field, S_IRUGO, 1)
+
+#define SETUP_OPTIONAL_PORT_ATTRIBUTE(field, func) \
+ SETUP_TEMPLATE(phy_attrs, field, S_IRUGO, i->f->func)
#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++
+ SETUP_TEMPLATE(phy_attrs, field, S_IWUGO, 1)
+#define SETUP_OPTIONAL_PORT_ATTRIBUTE_WRONLY(field, func) \
+ SETUP_TEMPLATE(phy_attrs, field, S_IWUGO, i->f->func)
+
+#define SETUP_END_DEV_ATTRIBUTE(field) \
+ SETUP_TEMPLATE(end_dev_attrs, field, S_IRUGO, 1)
/**
* sas_attach_transport -- instantiate SAS transport template
struct sas_internal *i;
int count;
- i = kmalloc(sizeof(struct sas_internal), GFP_KERNEL);
+ i = kzalloc(sizeof(struct sas_internal), GFP_KERNEL);
if (!i)
return NULL;
- memset(i, 0, sizeof(struct sas_internal));
- i->t.target_parent = sas_target_parent;
+ i->t.user_scan = sas_user_scan;
i->t.host_attrs.ac.attrs = &i->host_attrs[0];
i->t.host_attrs.ac.class = &sas_host_class.class;
i->rphy_attr_cont.ac.match = sas_rphy_match;
transport_container_register(&i->rphy_attr_cont);
+ i->end_dev_attr_cont.ac.class = &sas_end_dev_class.class;
+ i->end_dev_attr_cont.ac.attrs = &i->end_dev_attrs[0];
+ i->end_dev_attr_cont.ac.match = sas_end_dev_match;
+ transport_container_register(&i->end_dev_attr_cont);
+
i->f = ft;
count = 0;
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);
+ SETUP_OPTIONAL_PORT_ATTRIBUTE_WRONLY(link_reset, phy_reset);
+ SETUP_OPTIONAL_PORT_ATTRIBUTE_WRONLY(hard_reset, phy_reset);
i->phy_attrs[count] = NULL;
count = 0;
SETUP_RPORT_ATTRIBUTE(rphy_device_type);
SETUP_RPORT_ATTRIBUTE(rphy_sas_address);
SETUP_RPORT_ATTRIBUTE(rphy_phy_identifier);
+ SETUP_OPTIONAL_RPORT_ATTRIBUTE(rphy_enclosure_identifier,
+ get_enclosure_identifier);
+ SETUP_OPTIONAL_RPORT_ATTRIBUTE(rphy_bay_identifier,
+ get_bay_identifier);
i->rphy_attrs[count] = NULL;
+ count = 0;
+ SETUP_END_DEV_ATTRIBUTE(end_dev_ready_led_meaning);
+ SETUP_END_DEV_ATTRIBUTE(end_dev_I_T_nexus_loss_timeout);
+ SETUP_END_DEV_ATTRIBUTE(end_dev_initiator_response_timeout);
+ i->end_dev_attrs[count] = NULL;
+
return &i->t;
}
EXPORT_SYMBOL(sas_attach_transport);
error = transport_class_register(&sas_rphy_class);
if (error)
goto out_unregister_phy;
+ error = transport_class_register(&sas_end_dev_class);
+ if (error)
+ goto out_unregister_rphy;
return 0;
+ out_unregister_rphy:
+ transport_class_unregister(&sas_rphy_class);
out_unregister_phy:
transport_class_unregister(&sas_phy_class);
out_unregister_transport:
transport_class_unregister(&sas_host_class);
transport_class_unregister(&sas_phy_class);
transport_class_unregister(&sas_rphy_class);
+ transport_class_unregister(&sas_end_dev_class);
}
MODULE_AUTHOR("Christoph Hellwig");
Code Review / linux-2.6.git / blobdiff