/*
 * QLogic iSCSI HBA Driver
 * Copyright (c)  2003-2013 QLogic Corporation
 *
 * See LICENSE.qla4xxx for copyright and licensing details.
 */

/*
 *
 * qla4xxx_lookup_ddb_by_fw_index
 *	This routine locates a device handle given the firmware device
 *	database index.	 If device doesn't exist, returns NULL.
 *
 * Input:
 *	ha - Pointer to host adapter structure.
 *	fw_ddb_index - Firmware's device database index
 *
 * Returns:
 *	Pointer to the corresponding internal device database structure
 */
static inline struct ddb_entry *
qla4xxx_lookup_ddb_by_fw_index(struct scsi_qla_host *ha, uint32_t fw_ddb_index)
{
	struct ddb_entry *ddb_entry = NULL;

	if ((fw_ddb_index < MAX_DDB_ENTRIES) &&
	    (ha->fw_ddb_index_map[fw_ddb_index] !=
		(struct ddb_entry *) INVALID_ENTRY)) {
		ddb_entry = ha->fw_ddb_index_map[fw_ddb_index];
	}

	DEBUG3(printk("scsi%d: %s: ddb [%d], ddb_entry = %p\n",
	    ha->host_no, __func__, fw_ddb_index, ddb_entry));

	return ddb_entry;
}

static inline void
__qla4xxx_enable_intrs(struct scsi_qla_host *ha)
{
	if (is_qla4022(ha) | is_qla4032(ha)) {
		writel(set_rmask(IMR_SCSI_INTR_ENABLE),
		       &ha->reg->u1.isp4022.intr_mask);
		readl(&ha->reg->u1.isp4022.intr_mask);
	} else {
		writel(set_rmask(CSR_SCSI_INTR_ENABLE), &ha->reg->ctrl_status);
		readl(&ha->reg->ctrl_status);
	}
	set_bit(AF_INTERRUPTS_ON, &ha->flags);
}

static inline void
__qla4xxx_disable_intrs(struct scsi_qla_host *ha)
{
	if (is_qla4022(ha) | is_qla4032(ha)) {
		writel(clr_rmask(IMR_SCSI_INTR_ENABLE),
		       &ha->reg->u1.isp4022.intr_mask);
		readl(&ha->reg->u1.isp4022.intr_mask);
	} else {
		writel(clr_rmask(CSR_SCSI_INTR_ENABLE), &ha->reg->ctrl_status);
		readl(&ha->reg->ctrl_status);
	}
	clear_bit(AF_INTERRUPTS_ON, &ha->flags);
}

static inline void
qla4xxx_enable_intrs(struct scsi_qla_host *ha)
{
	unsigned long flags;

	spin_lock_irqsave(&ha->hardware_lock, flags);
	__qla4xxx_enable_intrs(ha);
	spin_unlock_irqrestore(&ha->hardware_lock, flags);
}

static inline void
qla4xxx_disable_intrs(struct scsi_qla_host *ha)
{
	unsigned long flags;

	spin_lock_irqsave(&ha->hardware_lock, flags);
	__qla4xxx_disable_intrs(ha);
	spin_unlock_irqrestore(&ha->hardware_lock, flags);
}

static inline int qla4xxx_get_chap_type(struct ql4_chap_table *chap_entry)
{
	int type;

	if (chap_entry->flags & BIT_7)
		type = LOCAL_CHAP;
	else
		type = BIDI_CHAP;

	return type;
}