1 /*
2  * QLogic iSCSI HBA Driver
3  * Copyright (c)  2003-2013 QLogic Corporation
4  *
5  * See LICENSE.qla4xxx for copyright and licensing details.
6  */
7 
8 /*
9  *
10  * qla4xxx_lookup_ddb_by_fw_index
11  *	This routine locates a device handle given the firmware device
12  *	database index.	 If device doesn't exist, returns NULL.
13  *
14  * Input:
15  *	ha - Pointer to host adapter structure.
16  *	fw_ddb_index - Firmware's device database index
17  *
18  * Returns:
19  *	Pointer to the corresponding internal device database structure
20  */
21 static inline struct ddb_entry *
22 qla4xxx_lookup_ddb_by_fw_index(struct scsi_qla_host *ha, uint32_t fw_ddb_index)
23 {
24 	struct ddb_entry *ddb_entry = NULL;
25 
26 	if ((fw_ddb_index < MAX_DDB_ENTRIES) &&
27 	    (ha->fw_ddb_index_map[fw_ddb_index] !=
28 		(struct ddb_entry *) INVALID_ENTRY)) {
29 		ddb_entry = ha->fw_ddb_index_map[fw_ddb_index];
30 	}
31 
32 	DEBUG3(printk("scsi%d: %s: ddb [%d], ddb_entry = %p\n",
33 	    ha->host_no, __func__, fw_ddb_index, ddb_entry));
34 
35 	return ddb_entry;
36 }
37 
38 static inline void
39 __qla4xxx_enable_intrs(struct scsi_qla_host *ha)
40 {
41 	if (is_qla4022(ha) | is_qla4032(ha)) {
42 		writel(set_rmask(IMR_SCSI_INTR_ENABLE),
43 		       &ha->reg->u1.isp4022.intr_mask);
44 		readl(&ha->reg->u1.isp4022.intr_mask);
45 	} else {
46 		writel(set_rmask(CSR_SCSI_INTR_ENABLE), &ha->reg->ctrl_status);
47 		readl(&ha->reg->ctrl_status);
48 	}
49 	set_bit(AF_INTERRUPTS_ON, &ha->flags);
50 }
51 
52 static inline void
53 __qla4xxx_disable_intrs(struct scsi_qla_host *ha)
54 {
55 	if (is_qla4022(ha) | is_qla4032(ha)) {
56 		writel(clr_rmask(IMR_SCSI_INTR_ENABLE),
57 		       &ha->reg->u1.isp4022.intr_mask);
58 		readl(&ha->reg->u1.isp4022.intr_mask);
59 	} else {
60 		writel(clr_rmask(CSR_SCSI_INTR_ENABLE), &ha->reg->ctrl_status);
61 		readl(&ha->reg->ctrl_status);
62 	}
63 	clear_bit(AF_INTERRUPTS_ON, &ha->flags);
64 }
65 
66 static inline void
67 qla4xxx_enable_intrs(struct scsi_qla_host *ha)
68 {
69 	unsigned long flags;
70 
71 	spin_lock_irqsave(&ha->hardware_lock, flags);
72 	__qla4xxx_enable_intrs(ha);
73 	spin_unlock_irqrestore(&ha->hardware_lock, flags);
74 }
75 
76 static inline void
77 qla4xxx_disable_intrs(struct scsi_qla_host *ha)
78 {
79 	unsigned long flags;
80 
81 	spin_lock_irqsave(&ha->hardware_lock, flags);
82 	__qla4xxx_disable_intrs(ha);
83 	spin_unlock_irqrestore(&ha->hardware_lock, flags);
84 }
85 
86 static inline int qla4xxx_get_chap_type(struct ql4_chap_table *chap_entry)
87 {
88 	int type;
89 
90 	if (chap_entry->flags & BIT_7)
91 		type = LOCAL_CHAP;
92 	else
93 		type = BIDI_CHAP;
94 
95 	return type;
96 }
97