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path: root/drivers/scsi/libata-scsi.c
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Diffstat (limited to 'drivers/scsi/libata-scsi.c')
-rw-r--r--drivers/scsi/libata-scsi.c149
1 files changed, 149 insertions, 0 deletions
diff --git a/drivers/scsi/libata-scsi.c b/drivers/scsi/libata-scsi.c
index 1638e57028c..37ec0266143 100644
--- a/drivers/scsi/libata-scsi.c
+++ b/drivers/scsi/libata-scsi.c
@@ -3158,3 +3158,152 @@ void ata_scsi_dev_rescan(void *data)
scsi_rescan_device(&(dev->sdev->sdev_gendev));
}
}
+
+/**
+ * ata_sas_port_alloc - Allocate port for a SAS attached SATA device
+ * @pdev: PCI device that the scsi device is attached to
+ * @port_info: Information from low-level host driver
+ * @host: SCSI host that the scsi device is attached to
+ *
+ * LOCKING:
+ * PCI/etc. bus probe sem.
+ *
+ * RETURNS:
+ * ata_port pointer on success / NULL on failure.
+ */
+
+struct ata_port *ata_sas_port_alloc(struct ata_host_set *host_set,
+ struct ata_port_info *port_info,
+ struct Scsi_Host *host)
+{
+ struct ata_port *ap = kzalloc(sizeof(*ap), GFP_KERNEL);
+ struct ata_probe_ent *ent;
+
+ if (!ap)
+ return NULL;
+
+ ent = ata_probe_ent_alloc(host_set->dev, port_info);
+ if (!ent) {
+ kfree(ap);
+ return NULL;
+ }
+
+ ata_port_init(ap, host_set, ent, 0);
+ ap->lock = host->host_lock;
+ kfree(ent);
+ return ap;
+}
+EXPORT_SYMBOL_GPL(ata_sas_port_alloc);
+
+/**
+ * ata_sas_port_start - Set port up for dma.
+ * @ap: Port to initialize
+ *
+ * Called just after data structures for each port are
+ * initialized. Allocates DMA pad.
+ *
+ * May be used as the port_start() entry in ata_port_operations.
+ *
+ * LOCKING:
+ * Inherited from caller.
+ */
+int ata_sas_port_start(struct ata_port *ap)
+{
+ return ata_pad_alloc(ap, ap->dev);
+}
+EXPORT_SYMBOL_GPL(ata_sas_port_start);
+
+/**
+ * ata_port_stop - Undo ata_sas_port_start()
+ * @ap: Port to shut down
+ *
+ * Frees the DMA pad.
+ *
+ * May be used as the port_stop() entry in ata_port_operations.
+ *
+ * LOCKING:
+ * Inherited from caller.
+ */
+
+void ata_sas_port_stop(struct ata_port *ap)
+{
+ ata_pad_free(ap, ap->dev);
+}
+EXPORT_SYMBOL_GPL(ata_sas_port_stop);
+
+/**
+ * ata_sas_port_init - Initialize a SATA device
+ * @ap: SATA port to initialize
+ *
+ * LOCKING:
+ * PCI/etc. bus probe sem.
+ *
+ * RETURNS:
+ * Zero on success, non-zero on error.
+ */
+
+int ata_sas_port_init(struct ata_port *ap)
+{
+ int rc = ap->ops->port_start(ap);
+
+ if (!rc)
+ rc = ata_bus_probe(ap);
+
+ return rc;
+}
+EXPORT_SYMBOL_GPL(ata_sas_port_init);
+
+/**
+ * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc
+ * @ap: SATA port to destroy
+ *
+ */
+
+void ata_sas_port_destroy(struct ata_port *ap)
+{
+ ap->ops->port_stop(ap);
+ kfree(ap);
+}
+EXPORT_SYMBOL_GPL(ata_sas_port_destroy);
+
+/**
+ * ata_sas_slave_configure - Default slave_config routine for libata devices
+ * @sdev: SCSI device to configure
+ * @ap: ATA port to which SCSI device is attached
+ *
+ * RETURNS:
+ * Zero.
+ */
+
+int ata_sas_slave_configure(struct scsi_device *sdev, struct ata_port *ap)
+{
+ ata_scsi_sdev_config(sdev);
+ ata_scsi_dev_config(sdev, ap->device);
+ return 0;
+}
+EXPORT_SYMBOL_GPL(ata_sas_slave_configure);
+
+/**
+ * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device
+ * @cmd: SCSI command to be sent
+ * @done: Completion function, called when command is complete
+ * @ap: ATA port to which the command is being sent
+ *
+ * RETURNS:
+ * Zero.
+ */
+
+int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *),
+ struct ata_port *ap)
+{
+ ata_scsi_dump_cdb(ap, cmd);
+
+ if (likely(ata_scsi_dev_enabled(ap->device)))
+ __ata_scsi_queuecmd(cmd, done, ap->device);
+ else {
+ cmd->result = (DID_BAD_TARGET << 16);
+ done(cmd);
+ }
+ return 0;
+}
+EXPORT_SYMBOL_GPL(ata_sas_queuecmd);