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(struct rsp_que *rsp)
36 {
37 	unsigned long flags;
38 	struct qla_hw_data *ha = rsp->hw;
39 	local_irq_save(flags);
40 	ha->isp_ops->intr_handler(0, rsp);
41 	local_irq_restore(flags);
42 }
43 
44 static inline uint8_t *
45 host_to_fcp_swap(uint8_t *fcp, uint32_t bsize)
46 {
47        uint32_t *ifcp = (uint32_t *) fcp;
48        uint32_t *ofcp = (uint32_t *) fcp;
49        uint32_t iter = bsize >> 2;
50 
51        for (; iter ; iter--)
52                *ofcp++ = swab32(*ifcp++);
53 
54        return fcp;
55 }
56 
57 static inline int
58 qla2x00_is_reserved_id(scsi_qla_host_t *vha, uint16_t loop_id)
59 {
60 	struct qla_hw_data *ha = vha->hw;
61 	if (IS_FWI2_CAPABLE(ha))
62 		return (loop_id > NPH_LAST_HANDLE);
63 
64 	return ((loop_id > ha->max_loop_id && loop_id < SNS_FIRST_LOOP_ID) ||
65 	    loop_id == MANAGEMENT_SERVER || loop_id == BROADCAST);
66 }
67