blob: 3e57a3e03dacf8dba9026dc4bf014513d065cfb7 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Andrew Vasquezfa90c542005-10-27 11:10:08 -07002 * QLogic Fibre Channel HBA Driver
Andrew Vasquez01e58d82008-04-03 13:13:13 -07003 * Copyright (c) 2003-2008 QLogic Corporation
Linus Torvalds1da177e2005-04-16 15:20:36 -07004 *
Andrew Vasquezfa90c542005-10-27 11:10:08 -07005 * See LICENSE.qla2xxx for copyright and licensing details.
Linus Torvalds1da177e2005-04-16 15:20:36 -07006 */
7
Linus Torvalds1da177e2005-04-16 15:20:36 -07008static __inline__ uint16_t qla2x00_debounce_register(volatile uint16_t __iomem *);
9/*
10 * qla2x00_debounce_register
11 * Debounce register.
12 *
13 * Input:
14 * port = register address.
15 *
16 * Returns:
17 * register value.
18 */
19static __inline__ uint16_t
Andrew Vasquezfa2a1ce2005-07-06 10:32:07 -070020qla2x00_debounce_register(volatile uint16_t __iomem *addr)
Linus Torvalds1da177e2005-04-16 15:20:36 -070021{
22 volatile uint16_t first;
23 volatile uint16_t second;
24
25 do {
26 first = RD_REG_WORD(addr);
27 barrier();
28 cpu_relax();
29 second = RD_REG_WORD(addr);
30 } while (first != second);
31
32 return (first);
33}
34
35static __inline__ int qla2x00_normalize_dma_addr(
36 dma_addr_t *e_addr, uint32_t *e_len,
37 dma_addr_t *ne_addr, uint32_t *ne_len);
38
39/**
40 * qla2x00_normalize_dma_addr() - Normalize an DMA address.
41 * @e_addr: Raw DMA address
42 * @e_len: Raw DMA length
43 * @ne_addr: Normalized second DMA address
44 * @ne_len: Normalized second DMA length
45 *
46 * If the address does not span a 4GB page boundary, the contents of @ne_addr
47 * and @ne_len are undefined. @e_len is updated to reflect a normalization.
48 *
49 * Example:
50 *
51 * ffffabc0ffffeeee (e_addr) start of DMA address
52 * 0000000020000000 (e_len) length of DMA transfer
53 * ffffabc11fffeeed end of DMA transfer
54 *
55 * Is the 4GB boundary crossed?
56 *
57 * ffffabc0ffffeeee (e_addr)
58 * ffffabc11fffeeed (e_addr + e_len - 1)
59 * 00000001e0000003 ((e_addr ^ (e_addr + e_len - 1))
60 * 0000000100000000 ((e_addr ^ (e_addr + e_len - 1)) & ~(0xffffffff)
61 *
62 * Compute start of second DMA segment:
63 *
64 * ffffabc0ffffeeee (e_addr)
65 * ffffabc1ffffeeee (0x100000000 + e_addr)
66 * ffffabc100000000 (0x100000000 + e_addr) & ~(0xffffffff)
67 * ffffabc100000000 (ne_addr)
Andrew Vasquezfa2a1ce2005-07-06 10:32:07 -070068 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070069 * Compute length of second DMA segment:
70 *
71 * 00000000ffffeeee (e_addr & 0xffffffff)
72 * 0000000000001112 (0x100000000 - (e_addr & 0xffffffff))
73 * 000000001fffeeee (e_len - (0x100000000 - (e_addr & 0xffffffff))
74 * 000000001fffeeee (ne_len)
75 *
76 * Adjust length of first DMA segment
77 *
78 * 0000000020000000 (e_len)
79 * 0000000000001112 (e_len - ne_len)
80 * 0000000000001112 (e_len)
81 *
82 * Returns non-zero if the specified address was normalized, else zero.
83 */
84static __inline__ int
85qla2x00_normalize_dma_addr(
86 dma_addr_t *e_addr, uint32_t *e_len,
87 dma_addr_t *ne_addr, uint32_t *ne_len)
88{
89 int normalized;
90
91 normalized = 0;
92 if ((*e_addr ^ (*e_addr + *e_len - 1)) & ~(0xFFFFFFFFULL)) {
93 /* Compute normalized crossed address and len */
94 *ne_addr = (0x100000000ULL + *e_addr) & ~(0xFFFFFFFFULL);
95 *ne_len = *e_len - (0x100000000ULL - (*e_addr & 0xFFFFFFFFULL));
96 *e_len -= *ne_len;
97
98 normalized++;
99 }
100 return (normalized);
101}
102
103static __inline__ void qla2x00_poll(scsi_qla_host_t *);
Andrew Vasquezfa2a1ce2005-07-06 10:32:07 -0700104static inline void
Linus Torvalds1da177e2005-04-16 15:20:36 -0700105qla2x00_poll(scsi_qla_host_t *ha)
106{
Andrew Vasquezfd34f552007-07-19 15:06:00 -0700107 ha->isp_ops->intr_handler(0, ha);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700108}
109
Linus Torvalds1da177e2005-04-16 15:20:36 -0700110static __inline__ void qla2x00_check_fabric_devices(scsi_qla_host_t *);
111/*
112 * This routine will wait for fabric devices for
113 * the reset delay.
114 */
Andrew Vasquezfa2a1ce2005-07-06 10:32:07 -0700115static __inline__ void qla2x00_check_fabric_devices(scsi_qla_host_t *ha)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700116{
117 uint16_t fw_state;
118
119 qla2x00_get_firmware_state(ha, &fw_state);
120}
121
Seokmann Juda4541b2008-01-31 12:33:52 -0800122static __inline__ scsi_qla_host_t * to_qla_parent(scsi_qla_host_t *);
123static __inline__ scsi_qla_host_t *
124to_qla_parent(scsi_qla_host_t *ha)
125{
126 return ha->parent ? ha->parent : ha;
127}
128
Linus Torvalds1da177e2005-04-16 15:20:36 -0700129/**
130 * qla2x00_issue_marker() - Issue a Marker IOCB if necessary.
131 * @ha: HA context
132 * @ha_locked: is function called with the hardware lock
133 *
134 * Returns non-zero if a failure occured, else zero.
135 */
136static inline int
137qla2x00_issue_marker(scsi_qla_host_t *ha, int ha_locked)
138{
139 /* Send marker if required */
140 if (ha->marker_needed != 0) {
141 if (ha_locked) {
142 if (__qla2x00_marker(ha, 0, 0, MK_SYNC_ALL) !=
143 QLA_SUCCESS)
144 return (QLA_FUNCTION_FAILED);
145 } else {
146 if (qla2x00_marker(ha, 0, 0, MK_SYNC_ALL) !=
147 QLA_SUCCESS)
148 return (QLA_FUNCTION_FAILED);
149 }
150 ha->marker_needed = 0;
151 }
152 return (QLA_SUCCESS);
153}
154
Andrew Vasquez2b6c0ce2005-07-06 10:31:17 -0700155static inline uint8_t *host_to_fcp_swap(uint8_t *, uint32_t);
156static inline uint8_t *
157host_to_fcp_swap(uint8_t *fcp, uint32_t bsize)
158{
159 uint32_t *ifcp = (uint32_t *) fcp;
160 uint32_t *ofcp = (uint32_t *) fcp;
161 uint32_t iter = bsize >> 2;
162
163 for (; iter ; iter--)
164 *ofcp++ = swab32(*ifcp++);
165
166 return fcp;
167}
Andrew Vasquez3d716442005-07-06 10:30:26 -0700168
169static inline int qla2x00_is_reserved_id(scsi_qla_host_t *, uint16_t);
170static inline int
171qla2x00_is_reserved_id(scsi_qla_host_t *ha, uint16_t loop_id)
172{
Andrew Vasqueze4289242007-07-19 15:05:56 -0700173 if (IS_FWI2_CAPABLE(ha))
Andrew Vasquez3d716442005-07-06 10:30:26 -0700174 return (loop_id > NPH_LAST_HANDLE);
175
176 return ((loop_id > ha->last_loop_id && loop_id < SNS_FIRST_LOOP_ID) ||
177 loop_id == MANAGEMENT_SERVER || loop_id == BROADCAST);
178};