1 /*
2  * QLogic Fibre Channel HBA Driver
3  * Copyright (c)  2003-2008 QLogic Corporation
4  *
5  * See LICENSE.qla2xxx for copyright and licensing details.
6  */
7 
8 /*
9  * qla2x00_debounce_register
10  *      Debounce register.
11  *
12  * Input:
13  *      port = register address.
14  *
15  * Returns:
16  *      register value.
17  */
18 static __inline__ uint16_t
19 qla2x00_debounce_register(volatile uint16_t __iomem *addr)
20 {
21 	volatile uint16_t first;
22 	volatile uint16_t second;
23 
24 	do {
25 		first = RD_REG_WORD(addr);
26 		barrier();
27 		cpu_relax();
28 		second = RD_REG_WORD(addr);
29 	} while (first != second);
30 
31 	return (first);
32 }
33 
34 static inline void
35 qla2x00_poll(scsi_qla_host_t *ha)
36 {
37 	ha->isp_ops->intr_handler(0, ha);
38 }
39 
40 static __inline__ scsi_qla_host_t *
41 to_qla_parent(scsi_qla_host_t *ha)
42 {
43 	return ha->parent ? ha->parent : ha;
44 }
45 
46 /**
47  * qla2x00_issue_marker() - Issue a Marker IOCB if necessary.
48  * @ha: HA context
49  * @ha_locked: is function called with the hardware lock
50  *
51  * Returns non-zero if a failure occured, else zero.
52  */
53 static inline int
54 qla2x00_issue_marker(scsi_qla_host_t *ha, int ha_locked)
55 {
56 	/* Send marker if required */
57 	if (ha->marker_needed != 0) {
58 		if (ha_locked) {
59 			if (__qla2x00_marker(ha, 0, 0, MK_SYNC_ALL) !=
60 			    QLA_SUCCESS)
61 				return (QLA_FUNCTION_FAILED);
62 		} else {
63 			if (qla2x00_marker(ha, 0, 0, MK_SYNC_ALL) !=
64 			    QLA_SUCCESS)
65 				return (QLA_FUNCTION_FAILED);
66 		}
67 		ha->marker_needed = 0;
68 	}
69 	return (QLA_SUCCESS);
70 }
71 
72 static inline uint8_t *
73 host_to_fcp_swap(uint8_t *fcp, uint32_t bsize)
74 {
75        uint32_t *ifcp = (uint32_t *) fcp;
76        uint32_t *ofcp = (uint32_t *) fcp;
77        uint32_t iter = bsize >> 2;
78 
79        for (; iter ; iter--)
80                *ofcp++ = swab32(*ifcp++);
81 
82        return fcp;
83 }
84 
85 static inline int
86 qla2x00_is_reserved_id(scsi_qla_host_t *ha, uint16_t loop_id)
87 {
88 	if (IS_FWI2_CAPABLE(ha))
89 		return (loop_id > NPH_LAST_HANDLE);
90 
91 	return ((loop_id > ha->last_loop_id && loop_id < SNS_FIRST_LOOP_ID) ||
92 	    loop_id == MANAGEMENT_SERVER || loop_id == BROADCAST);
93 };
94