Brian King wrote:
+/**
+ * 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
+ *
+ * LOCKING:
+ * PCI/etc. bus probe sem.
+ *
+ * RETURNS:
+ * ata_port pointer on success / NULL on failure.
+ */
+
+struct ata_port *ata_sas_port_alloc(struct pci_dev *pdev,
+ struct ata_port_info *port_info)
+{
+ struct ata_port *ap = kzalloc(sizeof(*ap), GFP_KERNEL);
+
+ if (!ap)
+ return NULL;
+
+ ap->dev = &pdev->dev;
+ ap->ops = port_info->port_ops;
+ ap->flags = port_info->host_flags;
+ ap->pio_mask = port_info->pio_mask;
+ ap->mwdma_mask = port_info->mwdma_mask;
+ ap->udma_mask = port_info->udma_mask;
+ ap->cbl = ATA_CBL_SATA;
+ ap->active_tag = ATA_TAG_POISON;
+ ap->last_ctl = 0xFF;
+ return ap;
+}
+EXPORT_SYMBOL_GPL(ata_sas_port_alloc);
+
+static void ata_sas_port_free(struct ata_port *ap)
+{
+ kfree(ap);
+}
+
+/**
+ * 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)
+{
+ if (ap) {
+ ap->ops->port_stop(ap);
+ ata_sas_port_free(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);
+ if (ata_dev_knobble(ap))
+ blk_queue_max_sectors(sdev->request_queue, ATA_MAX_SECTORS);
+ 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)
+{
+ if (unlikely(!ata_dev_present(ap->device))) {
+ cmd->result = (DID_BAD_TARGET << 16);
+ done(cmd);
+ return 0;
+ }
+
+ if (cmd->cmd_len > ap->cdb_len) {
+ cmd->result = (DID_ABORT << 16);
+ done(cmd);
+ return 0;
+ }
+
+ __ata_scsi_queuecmd(cmd, done, ap, ap->device);
+ return 0;
+}
I'm still thinking about these functions, so it would be nice to split
them up into a third patch. That would allow me to apply the other
cleanups in this patch.
Jeff
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