2 * QLOGIC LINUX SOFTWARE
4 * QLogic ISP2x00 device driver for Linux 2.6.x
5 * Copyright (C) 2003-2004 QLogic Corporation
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
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.
21 static __inline__ uint16_t qla2x00_debounce_register(volatile uint16_t *);
23 * qla2x00_debounce_register
27 * port = register address.
32 static __inline__ uint16_t
33 qla2x00_debounce_register(volatile uint16_t *addr)
35 volatile uint16_t first;
36 volatile uint16_t second;
39 first = RD_REG_WORD(addr);
42 second = RD_REG_WORD(addr);
43 } while (first != second);
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);
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
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.
64 * ffffabc0ffffeeee (e_addr) start of DMA address
65 * 0000000020000000 (e_len) length of DMA transfer
66 * ffffabc11fffeeed end of DMA transfer
68 * Is the 4GB boundary crossed?
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)
75 * Compute start of second DMA segment:
77 * ffffabc0ffffeeee (e_addr)
78 * ffffabc1ffffeeee (0x100000000 + e_addr)
79 * ffffabc100000000 (0x100000000 + e_addr) & ~(0xffffffff)
80 * ffffabc100000000 (ne_addr)
82 * Compute length of second DMA segment:
84 * 00000000ffffeeee (e_addr & 0xffffffff)
85 * 0000000000001112 (0x100000000 - (e_addr & 0xffffffff))
86 * 000000001fffeeee (e_len - (0x100000000 - (e_addr & 0xffffffff))
87 * 000000001fffeeee (ne_len)
89 * Adjust length of first DMA segment
91 * 0000000020000000 (e_len)
92 * 0000000000001112 (e_len - ne_len)
93 * 0000000000001112 (e_len)
95 * Returns non-zero if the specified address was normalized, else zero.
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)
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));
116 static __inline__ void qla2x00_poll(scsi_qla_host_t *);
118 qla2x00_poll(scsi_qla_host_t *ha)
120 qla2x00_intr_handler(0, ha, NULL);
124 static __inline__ void qla2x00_enable_intrs(scsi_qla_host_t *);
125 static __inline__ void qla2x00_disable_intrs(scsi_qla_host_t *);
128 qla2x00_enable_intrs(scsi_qla_host_t *ha)
130 unsigned long flags = 0;
133 spin_lock_irqsave(&ha->hardware_lock, flags);
135 ha->interrupts_on = 1;
136 /* enable risc and host interrupts */
137 WRT_REG_WORD(®->ictrl, ICR_EN_INT | ICR_EN_RISC);
138 RD_REG_WORD(®->ictrl);
139 spin_unlock_irqrestore(&ha->hardware_lock, flags);
144 qla2x00_disable_intrs(scsi_qla_host_t *ha)
146 unsigned long flags = 0;
149 spin_lock_irqsave(&ha->hardware_lock, flags);
151 ha->interrupts_on = 0;
152 /* disable risc and host interrupts */
153 WRT_REG_WORD(®->ictrl, 0);
154 RD_REG_WORD(®->ictrl);
155 spin_unlock_irqrestore(&ha->hardware_lock, flags);
159 static __inline__ int qla2x00_is_wwn_zero(uint8_t *);
162 * qla2x00_is_wwn_zero - Check for zero node name
165 * wwn = Pointer to WW name to check
168 * 1 if name is 0x00 else 0
173 static __inline__ int
174 qla2x00_is_wwn_zero(uint8_t *wwn)
178 for (cnt = 0; cnt < WWN_SIZE ; cnt++, wwn++) {
182 /* if zero return 1 */
189 static __inline__ uint8_t
190 qla2x00_suspend_lun(scsi_qla_host_t *, os_lun_t *, int, int);
191 static __inline__ uint8_t
192 qla2x00_delay_lun(scsi_qla_host_t *, os_lun_t *, int);
194 static __inline__ uint8_t
195 qla2x00_suspend_lun(scsi_qla_host_t *ha, os_lun_t *lq, int time, int count)
197 return (__qla2x00_suspend_lun(ha, lq, time, count, 0));
200 static __inline__ uint8_t
201 qla2x00_delay_lun(scsi_qla_host_t *ha, os_lun_t *lq, int time)
203 return (__qla2x00_suspend_lun(ha, lq, time, 1, 1));
206 static __inline__ void qla2x00_check_fabric_devices(scsi_qla_host_t *);
208 * This routine will wait for fabric devices for
211 static __inline__ void qla2x00_check_fabric_devices(scsi_qla_host_t *ha)
215 qla2x00_get_firmware_state(ha, &fw_state);
219 * qla2x00_issue_marker() - Issue a Marker IOCB if necessary.
221 * @ha_locked: is function called with the hardware lock
223 * Returns non-zero if a failure occured, else zero.
226 qla2x00_issue_marker(scsi_qla_host_t *ha, int ha_locked)
228 /* Send marker if required */
229 if (ha->marker_needed != 0) {
231 if (__qla2x00_marker(ha, 0, 0, MK_SYNC_ALL) !=
233 return (QLA_FUNCTION_FAILED);
235 if (qla2x00_marker(ha, 0, 0, MK_SYNC_ALL) !=
237 return (QLA_FUNCTION_FAILED);
239 ha->marker_needed = 0;
241 return (QLA_SUCCESS);
244 static __inline__ void qla2x00_add_timer_to_cmd(srb_t *, int);
245 static __inline__ void qla2x00_delete_timer_from_cmd(srb_t *);
247 /**************************************************************************
248 * qla2x00_add_timer_to_cmd
251 * Creates a timer for the specified command. The timeout is usually
252 * the command time from kernel minus 2 secs.
255 * sp - pointer to validate
259 **************************************************************************/
261 qla2x00_add_timer_to_cmd(srb_t *sp, int timeout)
263 init_timer(&sp->timer);
264 sp->timer.expires = jiffies + timeout * HZ;
265 sp->timer.data = (unsigned long) sp;
266 sp->timer.function = (void (*) (unsigned long))qla2x00_cmd_timeout;
267 add_timer(&sp->timer);
270 /**************************************************************************
271 * qla2x00_delete_timer_from_cmd
274 * Delete the timer for the specified command.
277 * sp - pointer to validate
281 **************************************************************************/
283 qla2x00_delete_timer_from_cmd(srb_t *sp)
285 if (sp->timer.function != NULL) {
286 del_timer(&sp->timer);
287 sp->timer.function = NULL;
288 sp->timer.data = (unsigned long) NULL;