#include <linux/err.h>
#include <linux/slab.h>
#include <linux/string.h>
+#include <linux/blkdev.h>
+#include <linux/bsg.h>
#include <scsi/scsi.h>
#include <scsi/scsi_device.h>
struct sas_host_attrs {
struct list_head rphy_list;
struct mutex lock;
+ struct request_queue *q;
u32 next_target_id;
u32 next_expander_id;
int next_port_id;
sas_bitfield_name_search(linkspeed, sas_linkspeed_names)
sas_bitfield_name_set(linkspeed, sas_linkspeed_names)
+static void sas_smp_request(struct request_queue *q, struct Scsi_Host *shost,
+ struct sas_rphy *rphy)
+{
+ struct request *req;
+ int ret;
+ int (*handler)(struct Scsi_Host *, struct sas_rphy *, struct request *);
+
+ while (!blk_queue_plugged(q)) {
+ req = elv_next_request(q);
+ if (!req)
+ break;
+
+ blkdev_dequeue_request(req);
+
+ spin_unlock_irq(q->queue_lock);
+
+ handler = to_sas_internal(shost->transportt)->f->smp_handler;
+ ret = handler(shost, rphy, req);
+
+ spin_lock_irq(q->queue_lock);
+
+ req->end_io(req, ret);
+ }
+}
+
+static void sas_host_smp_request(struct request_queue *q)
+{
+ sas_smp_request(q, (struct Scsi_Host *)q->queuedata, NULL);
+}
+
+static void sas_non_host_smp_request(struct request_queue *q)
+{
+ struct sas_rphy *rphy = q->queuedata;
+ sas_smp_request(q, rphy_to_shost(rphy), rphy);
+}
+
+static int sas_bsg_initialize(struct Scsi_Host *shost, struct sas_rphy *rphy)
+{
+ struct request_queue *q;
+ int error;
+ struct device *dev;
+ char namebuf[BUS_ID_SIZE];
+ const char *name;
+
+ if (!to_sas_internal(shost->transportt)->f->smp_handler) {
+ printk("%s can't handle SMP requests\n", shost->hostt->name);
+ return 0;
+ }
+
+ if (rphy) {
+ q = blk_init_queue(sas_non_host_smp_request, NULL);
+ dev = &rphy->dev;
+ name = dev->bus_id;
+ } else {
+ q = blk_init_queue(sas_host_smp_request, NULL);
+ dev = &shost->shost_gendev;
+ snprintf(namebuf, sizeof(namebuf),
+ "sas_host%d", shost->host_no);
+ name = namebuf;
+ }
+ if (!q)
+ return -ENOMEM;
+
+ error = bsg_register_queue(q, dev, name);
+ if (error) {
+ blk_cleanup_queue(q);
+ return -ENOMEM;
+ }
+
+ if (rphy)
+ rphy->q = q;
+ else
+ to_sas_host_attrs(shost)->q = q;
+
+ if (rphy)
+ q->queuedata = rphy;
+ else
+ q->queuedata = shost;
+
+ set_bit(QUEUE_FLAG_BIDI, &q->queue_flags);
+
+ return 0;
+}
+
+static void sas_bsg_remove(struct Scsi_Host *shost, struct sas_rphy *rphy)
+{
+ struct request_queue *q;
+
+ if (rphy)
+ q = rphy->q;
+ else
+ q = to_sas_host_attrs(shost)->q;
+
+ if (!q)
+ return;
+
+ bsg_unregister_queue(q);
+ blk_cleanup_queue(q);
+}
+
/*
* SAS host attributes
*/
sas_host->next_target_id = 0;
sas_host->next_expander_id = 0;
sas_host->next_port_id = 0;
+
+ if (sas_bsg_initialize(shost, NULL))
+ dev_printk(KERN_ERR, dev, "fail to a bsg device %d\n",
+ shost->host_no);
+
+ return 0;
+}
+
+static int sas_host_remove(struct transport_container *tc, struct device *dev,
+ struct class_device *cdev)
+{
+ struct Scsi_Host *shost = dev_to_shost(dev);
+
+ sas_bsg_remove(shost, NULL);
+
return 0;
}
static DECLARE_TRANSPORT_CLASS(sas_host_class,
- "sas_host", sas_host_setup, NULL, NULL);
+ "sas_host", sas_host_setup, sas_host_remove, NULL);
static int sas_host_match(struct attribute_container *cont,
struct device *dev)
EXPORT_SYMBOL(sas_phy_alloc);
/**
- * sas_phy_add -- add a SAS PHY to the device hierachy
+ * sas_phy_add -- add a SAS PHY to the device hierarchy
* @phy: The PHY to be added
*
* Publishes a SAS PHY to the rest of the system.
static void sas_port_create_link(struct sas_port *port,
struct sas_phy *phy)
{
- sysfs_create_link(&port->dev.kobj, &phy->dev.kobj, phy->dev.bus_id);
- sysfs_create_link(&phy->dev.kobj, &port->dev.kobj, "port");
+ int res;
+
+ res = sysfs_create_link(&port->dev.kobj, &phy->dev.kobj,
+ phy->dev.bus_id);
+ if (res)
+ goto err;
+ res = sysfs_create_link(&phy->dev.kobj, &port->dev.kobj, "port");
+ if (res)
+ goto err;
+ return;
+err:
+ printk(KERN_ERR "%s: Cannot create port links, err=%d\n",
+ __FUNCTION__, res);
}
static void sas_port_delete_link(struct sas_port *port,
void sas_port_mark_backlink(struct sas_port *port)
{
+ int res;
struct device *parent = port->dev.parent->parent->parent;
if (port->is_backlink)
return;
port->is_backlink = 1;
- sysfs_create_link(&port->dev.kobj, &parent->kobj,
- parent->bus_id);
+ res = sysfs_create_link(&port->dev.kobj, &parent->kobj,
+ parent->bus_id);
+ if (res)
+ goto err;
+ return;
+err:
+ printk(KERN_ERR "%s: Cannot create port backlink, err=%d\n",
+ __FUNCTION__, res);
}
EXPORT_SYMBOL(sas_port_mark_backlink);
EXPORT_SYMBOL(sas_expander_alloc);
/**
- * sas_rphy_add -- add a SAS remote PHY to the device hierachy
+ * sas_rphy_add -- add a SAS remote PHY to the device hierarchy
* @rphy: The remote PHY to be added
*
* Publishes a SAS remote PHY to the rest of the system.
return error;
transport_add_device(&rphy->dev);
transport_configure_device(&rphy->dev);
+ if (sas_bsg_initialize(shost, rphy))
+ printk("fail to a bsg device %s\n", rphy->dev.bus_id);
+
mutex_lock(&sas_host->lock);
list_add_tail(&rphy->list, &sas_host->rphy_list);
* Note:
* This function must only be called on a remote
* PHY that has not sucessfully been added using
- * sas_rphy_add().
+ * sas_rphy_add() (or has been sas_rphy_remove()'d)
*/
void sas_rphy_free(struct sas_rphy *rphy)
{
list_del(&rphy->list);
mutex_unlock(&sas_host->lock);
+ sas_bsg_remove(shost, rphy);
+
transport_destroy_device(dev);
put_device(dev);
EXPORT_SYMBOL(sas_rphy_free);
/**
- * sas_rphy_delete -- remove SAS remote PHY
- * @rphy: SAS remote PHY to remove
+ * sas_rphy_delete -- remove and free SAS remote PHY
+ * @rphy: SAS remote PHY to remove and free
*
- * Removes the specified SAS remote PHY.
+ * Removes the specified SAS remote PHY and frees it.
*/
void
sas_rphy_delete(struct sas_rphy *rphy)
+{
+ sas_rphy_remove(rphy);
+ sas_rphy_free(rphy);
+}
+EXPORT_SYMBOL(sas_rphy_delete);
+
+/**
+ * sas_rphy_remove -- remove SAS remote PHY
+ * @rphy: SAS remote phy to remove
+ *
+ * Removes the specified SAS remote PHY.
+ */
+void
+sas_rphy_remove(struct sas_rphy *rphy)
{
struct device *dev = &rphy->dev;
struct sas_port *parent = dev_to_sas_port(dev->parent);
- struct Scsi_Host *shost = dev_to_shost(parent->dev.parent);
- struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
switch (rphy->identify.device_type) {
case SAS_END_DEVICE:
transport_remove_device(dev);
device_del(dev);
- transport_destroy_device(dev);
-
- mutex_lock(&sas_host->lock);
- list_del(&rphy->list);
- mutex_unlock(&sas_host->lock);
parent->rphy = NULL;
-
- put_device(dev);
}
-EXPORT_SYMBOL(sas_rphy_delete);
+EXPORT_SYMBOL(sas_rphy_remove);
/**
* scsi_is_sas_rphy -- check if a struct device represents a SAS remote PHY
}
MODULE_AUTHOR("Christoph Hellwig");
-MODULE_DESCRIPTION("SAS Transphy Attributes");
+MODULE_DESCRIPTION("SAS Transport Attributes");
MODULE_LICENSE("GPL");
module_init(sas_transport_init);
projects / linux-2.6-omap-h63xx.git / blobdiff