1 /*
2 * QLOGIC LINUX SOFTWARE
3 *
4 * QLogic ISP2x00 device driver for Linux 2.6.x
5 * Copyright (C) 2003-2004 QLogic Corporation
6 * (www.qlogic.com)
7 *
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published by the
10 * Free Software Foundation; either version 2, or (at your option) any
11 * later version.
12 *
13 * This program is distributed in the hope that it will be useful, but
14 * WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * General Public License for more details.
17 *
18 */
19
20
21 static __inline__ uint16_t qla2x00_debounce_register(volatile uint16_t __iomem *);
22 /*
23 * qla2x00_debounce_register
24 * Debounce register.
25 *
26 * Input:
27 * port = register address.
28 *
29 * Returns:
30 * register value.
31 */
32 static __inline__ uint16_t
33 qla2x00_debounce_register(volatile uint16_t __iomem *addr)
34 {
35 volatile uint16_t first;
36 volatile uint16_t second;
37
38 do {
39 first = RD_REG_WORD(addr);
40 barrier();
41 cpu_relax();
42 second = RD_REG_WORD(addr);
43 } while (first != second);
44
45 return (first);
46 }
47
48 static __inline__ int qla2x00_normalize_dma_addr(
49 dma_addr_t *e_addr, uint32_t *e_len,
50 dma_addr_t *ne_addr, uint32_t *ne_len);
51
52 /**
53 * qla2x00_normalize_dma_addr() - Normalize an DMA address.
54 * @e_addr: Raw DMA address
55 * @e_len: Raw DMA length
56 * @ne_addr: Normalized second DMA address
57 * @ne_len: Normalized second DMA length
58 *
59 * If the address does not span a 4GB page boundary, the contents of @ne_addr
60 * and @ne_len are undefined. @e_len is updated to reflect a normalization.
61 *
62 * Example:
63 *
64 * ffffabc0ffffeeee (e_addr) start of DMA address
65 * 0000000020000000 (e_len) length of DMA transfer
66 * ffffabc11fffeeed end of DMA transfer
67 *
68 * Is the 4GB boundary crossed?
69 *
70 * ffffabc0ffffeeee (e_addr)
71 * ffffabc11fffeeed (e_addr + e_len - 1)
72 * 00000001e0000003 ((e_addr ^ (e_addr + e_len - 1))
73 * 0000000100000000 ((e_addr ^ (e_addr + e_len - 1)) & ~(0xffffffff)
74 *
75 * Compute start of second DMA segment:
76 *
77 * ffffabc0ffffeeee (e_addr)
78 * ffffabc1ffffeeee (0x100000000 + e_addr)
79 * ffffabc100000000 (0x100000000 + e_addr) & ~(0xffffffff)
80 * ffffabc100000000 (ne_addr)
81 *
82 * Compute length of second DMA segment:
83 *
84 * 00000000ffffeeee (e_addr & 0xffffffff)
85 * 0000000000001112 (0x100000000 - (e_addr & 0xffffffff))
86 * 000000001fffeeee (e_len - (0x100000000 - (e_addr & 0xffffffff))
87 * 000000001fffeeee (ne_len)
88 *
89 * Adjust length of first DMA segment
90 *
91 * 0000000020000000 (e_len)
92 * 0000000000001112 (e_len - ne_len)
93 * 0000000000001112 (e_len)
94 *
95 * Returns non-zero if the specified address was normalized, else zero.
96 */
97 static __inline__ int
98 qla2x00_normalize_dma_addr(
99 dma_addr_t *e_addr, uint32_t *e_len,
100 dma_addr_t *ne_addr, uint32_t *ne_len)
101 {
102 int normalized;
103
104 normalized = 0;
105 if ((*e_addr ^ (*e_addr + *e_len - 1)) & ~(0xFFFFFFFFULL)) {
106 /* Compute normalized crossed address and len */
107 *ne_addr = (0x100000000ULL + *e_addr) & ~(0xFFFFFFFFULL);
108 *ne_len = *e_len - (0x100000000ULL - (*e_addr & 0xFFFFFFFFULL));
109 *e_len -= *ne_len;
110
111 normalized++;
112 }
113 return (normalized);
114 }
115
116 static __inline__ void qla2x00_poll(scsi_qla_host_t *);
117 static inline void
118 qla2x00_poll(scsi_qla_host_t *ha)
119 {
120 if (IS_QLA2100(ha) || IS_QLA2200(ha))
121 qla2100_intr_handler(0, ha, NULL);
122 else
123 qla2300_intr_handler(0, ha, NULL);
124 }
125
126
127 static __inline__ void qla2x00_enable_intrs(scsi_qla_host_t *);
128 static __inline__ void qla2x00_disable_intrs(scsi_qla_host_t *);
129
130 static inline void
131 qla2x00_enable_intrs(scsi_qla_host_t *ha)
132 {
133 unsigned long flags = 0;
134 device_reg_t __iomem *reg = ha->iobase;
135
136 spin_lock_irqsave(&ha->hardware_lock, flags);
137 ha->interrupts_on = 1;
138 /* enable risc and host interrupts */
139 WRT_REG_WORD(®->ictrl, ICR_EN_INT | ICR_EN_RISC);
140 RD_REG_WORD(®->ictrl);
141 spin_unlock_irqrestore(&ha->hardware_lock, flags);
142
143 }
144
145 static inline void
146 qla2x00_disable_intrs(scsi_qla_host_t *ha)
147 {
148 unsigned long flags = 0;
149 device_reg_t __iomem *reg = ha->iobase;
150
151 spin_lock_irqsave(&ha->hardware_lock, flags);
152 ha->interrupts_on = 0;
153 /* disable risc and host interrupts */
154 WRT_REG_WORD(®->ictrl, 0);
155 RD_REG_WORD(®->ictrl);
156 spin_unlock_irqrestore(&ha->hardware_lock, flags);
157 }
158
159
160 static __inline__ int qla2x00_is_wwn_zero(uint8_t *);
161
162 /*
163 * qla2x00_is_wwn_zero - Check for zero node name
164 *
165 * Input:
166 * wwn = Pointer to WW name to check
167 *
168 * Returns:
169 * 1 if name is 0x00 else 0
170 *
171 * Context:
172 * Kernel context.
173 */
174 static __inline__ int
175 qla2x00_is_wwn_zero(uint8_t *wwn)
176 {
177 int cnt;
178
179 for (cnt = 0; cnt < WWN_SIZE ; cnt++, wwn++) {
180 if (*wwn != 0)
181 break;
182 }
183 /* if zero return 1 */
184 if (cnt == WWN_SIZE)
185 return (1);
186 else
187 return (0);
188 }
189
190 static __inline__ uint8_t
191 qla2x00_suspend_lun(scsi_qla_host_t *, os_lun_t *, int, int);
192 static __inline__ uint8_t
193 qla2x00_delay_lun(scsi_qla_host_t *, os_lun_t *, int);
194
195 static __inline__ uint8_t
196 qla2x00_suspend_lun(scsi_qla_host_t *ha, os_lun_t *lq, int time, int count)
197 {
198 return (__qla2x00_suspend_lun(ha, lq, time, count, 0));
199 }
200
201 static __inline__ uint8_t
202 qla2x00_delay_lun(scsi_qla_host_t *ha, os_lun_t *lq, int time)
203 {
204 return (__qla2x00_suspend_lun(ha, lq, time, 1, 1));
205 }
206
207 static __inline__ void qla2x00_check_fabric_devices(scsi_qla_host_t *);
208 /*
209 * This routine will wait for fabric devices for
210 * the reset delay.
211 */
212 static __inline__ void qla2x00_check_fabric_devices(scsi_qla_host_t *ha)
213 {
214 uint16_t fw_state;
215
216 qla2x00_get_firmware_state(ha, &fw_state);
217 }
218
219 /**
220 * qla2x00_issue_marker() - Issue a Marker IOCB if necessary.
221 * @ha: HA context
222 * @ha_locked: is function called with the hardware lock
223 *
224 * Returns non-zero if a failure occured, else zero.
225 */
226 static inline int
227 qla2x00_issue_marker(scsi_qla_host_t *ha, int ha_locked)
228 {
229 /* Send marker if required */
230 if (ha->marker_needed != 0) {
231 if (ha_locked) {
232 if (__qla2x00_marker(ha, 0, 0, MK_SYNC_ALL) !=
233 QLA_SUCCESS)
234 return (QLA_FUNCTION_FAILED);
235 } else {
236 if (qla2x00_marker(ha, 0, 0, MK_SYNC_ALL) !=
237 QLA_SUCCESS)
238 return (QLA_FUNCTION_FAILED);
239 }
240 ha->marker_needed = 0;
241 }
242 return (QLA_SUCCESS);
243 }
244
245 static __inline__ void qla2x00_add_timer_to_cmd(srb_t *, int);
246 static __inline__ void qla2x00_delete_timer_from_cmd(srb_t *);
247
248 /**************************************************************************
249 * qla2x00_add_timer_to_cmd
250 *
251 * Description:
252 * Creates a timer for the specified command. The timeout is usually
253 * the command time from kernel minus 2 secs.
254 *
255 * Input:
256 * sp - pointer to validate
257 *
258 * Returns:
259 * None.
260 **************************************************************************/
261 static inline void
262 qla2x00_add_timer_to_cmd(srb_t *sp, int timeout)
263 {
264 init_timer(&sp->timer);
265 sp->timer.expires = jiffies + timeout * HZ;
266 sp->timer.data = (unsigned long) sp;
267 sp->timer.function = (void (*) (unsigned long))qla2x00_cmd_timeout;
268 add_timer(&sp->timer);
269 }
270
271 /**************************************************************************
272 * qla2x00_delete_timer_from_cmd
273 *
274 * Description:
275 * Delete the timer for the specified command.
276 *
277 * Input:
278 * sp - pointer to validate
279 *
280 * Returns:
281 * None.
282 **************************************************************************/
283 static inline void
284 qla2x00_delete_timer_from_cmd(srb_t *sp)
285 {
286 if (sp->timer.function != NULL) {
287 del_timer(&sp->timer);
288 sp->timer.function = NULL;
289 sp->timer.data = (unsigned long) NULL;
290 }
291 }
292
293
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