mirror of
https://github.com/adulau/aha.git
synced 2024-12-27 19:26:25 +00:00
1beb6fa85c
Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Acked-by: Jeff Garzik <jgarzik@redhat.com> Acked-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
190 lines
5 KiB
C
190 lines
5 KiB
C
/*
|
|
* Device driver for the SYMBIOS/LSILOGIC 53C8XX and 53C1010 family
|
|
* of PCI-SCSI IO processors.
|
|
*
|
|
* Copyright (C) 1999-2001 Gerard Roudier <groudier@free.fr>
|
|
*
|
|
* This driver is derived from the Linux sym53c8xx driver.
|
|
* Copyright (C) 1998-2000 Gerard Roudier
|
|
*
|
|
* The sym53c8xx driver is derived from the ncr53c8xx driver that had been
|
|
* a port of the FreeBSD ncr driver to Linux-1.2.13.
|
|
*
|
|
* The original ncr driver has been written for 386bsd and FreeBSD by
|
|
* Wolfgang Stanglmeier <wolf@cologne.de>
|
|
* Stefan Esser <se@mi.Uni-Koeln.de>
|
|
* Copyright (C) 1994 Wolfgang Stanglmeier
|
|
*
|
|
* Other major contributions:
|
|
*
|
|
* NVRAM detection and reading.
|
|
* Copyright (C) 1997 Richard Waltham <dormouse@farsrobt.demon.co.uk>
|
|
*
|
|
*-----------------------------------------------------------------------------
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*/
|
|
|
|
#ifndef SYM_MISC_H
|
|
#define SYM_MISC_H
|
|
|
|
/*
|
|
* A la VMS/CAM-3 queue management.
|
|
*/
|
|
typedef struct sym_quehead {
|
|
struct sym_quehead *flink; /* Forward pointer */
|
|
struct sym_quehead *blink; /* Backward pointer */
|
|
} SYM_QUEHEAD;
|
|
|
|
#define sym_que_init(ptr) do { \
|
|
(ptr)->flink = (ptr); (ptr)->blink = (ptr); \
|
|
} while (0)
|
|
|
|
static inline struct sym_quehead *sym_que_first(struct sym_quehead *head)
|
|
{
|
|
return (head->flink == head) ? 0 : head->flink;
|
|
}
|
|
|
|
static inline struct sym_quehead *sym_que_last(struct sym_quehead *head)
|
|
{
|
|
return (head->blink == head) ? 0 : head->blink;
|
|
}
|
|
|
|
static inline void __sym_que_add(struct sym_quehead * new,
|
|
struct sym_quehead * blink,
|
|
struct sym_quehead * flink)
|
|
{
|
|
flink->blink = new;
|
|
new->flink = flink;
|
|
new->blink = blink;
|
|
blink->flink = new;
|
|
}
|
|
|
|
static inline void __sym_que_del(struct sym_quehead * blink,
|
|
struct sym_quehead * flink)
|
|
{
|
|
flink->blink = blink;
|
|
blink->flink = flink;
|
|
}
|
|
|
|
static inline int sym_que_empty(struct sym_quehead *head)
|
|
{
|
|
return head->flink == head;
|
|
}
|
|
|
|
static inline void sym_que_splice(struct sym_quehead *list,
|
|
struct sym_quehead *head)
|
|
{
|
|
struct sym_quehead *first = list->flink;
|
|
|
|
if (first != list) {
|
|
struct sym_quehead *last = list->blink;
|
|
struct sym_quehead *at = head->flink;
|
|
|
|
first->blink = head;
|
|
head->flink = first;
|
|
|
|
last->flink = at;
|
|
at->blink = last;
|
|
}
|
|
}
|
|
|
|
static inline void sym_que_move(struct sym_quehead *orig,
|
|
struct sym_quehead *dest)
|
|
{
|
|
struct sym_quehead *first, *last;
|
|
|
|
first = orig->flink;
|
|
if (first != orig) {
|
|
first->blink = dest;
|
|
dest->flink = first;
|
|
last = orig->blink;
|
|
last->flink = dest;
|
|
dest->blink = last;
|
|
orig->flink = orig;
|
|
orig->blink = orig;
|
|
} else {
|
|
dest->flink = dest;
|
|
dest->blink = dest;
|
|
}
|
|
}
|
|
|
|
#define sym_que_entry(ptr, type, member) container_of(ptr, type, member)
|
|
|
|
#define sym_insque(new, pos) __sym_que_add(new, pos, (pos)->flink)
|
|
|
|
#define sym_remque(el) __sym_que_del((el)->blink, (el)->flink)
|
|
|
|
#define sym_insque_head(new, head) __sym_que_add(new, head, (head)->flink)
|
|
|
|
static inline struct sym_quehead *sym_remque_head(struct sym_quehead *head)
|
|
{
|
|
struct sym_quehead *elem = head->flink;
|
|
|
|
if (elem != head)
|
|
__sym_que_del(head, elem->flink);
|
|
else
|
|
elem = NULL;
|
|
return elem;
|
|
}
|
|
|
|
#define sym_insque_tail(new, head) __sym_que_add(new, (head)->blink, head)
|
|
|
|
static inline struct sym_quehead *sym_remque_tail(struct sym_quehead *head)
|
|
{
|
|
struct sym_quehead *elem = head->blink;
|
|
|
|
if (elem != head)
|
|
__sym_que_del(elem->blink, head);
|
|
else
|
|
elem = 0;
|
|
return elem;
|
|
}
|
|
|
|
/*
|
|
* This one may be useful.
|
|
*/
|
|
#define FOR_EACH_QUEUED_ELEMENT(head, qp) \
|
|
for (qp = (head)->flink; qp != (head); qp = qp->flink)
|
|
/*
|
|
* FreeBSD does not offer our kind of queue in the CAM CCB.
|
|
* So, we have to cast.
|
|
*/
|
|
#define sym_qptr(p) ((struct sym_quehead *) (p))
|
|
|
|
/*
|
|
* Simple bitmap operations.
|
|
*/
|
|
#define sym_set_bit(p, n) (((u32 *)(p))[(n)>>5] |= (1<<((n)&0x1f)))
|
|
#define sym_clr_bit(p, n) (((u32 *)(p))[(n)>>5] &= ~(1<<((n)&0x1f)))
|
|
#define sym_is_bit(p, n) (((u32 *)(p))[(n)>>5] & (1<<((n)&0x1f)))
|
|
|
|
/*
|
|
* The below round up/down macros are to be used with a constant
|
|
* as argument (sizeof(...) for example), for the compiler to
|
|
* optimize the whole thing.
|
|
*/
|
|
#define _U_(a,m) (a)<=(1<<m)?m:
|
|
|
|
/*
|
|
* Round up logarithm to base 2 of a 16 bit constant.
|
|
*/
|
|
#define _LGRU16_(a) \
|
|
( \
|
|
_U_(a, 0)_U_(a, 1)_U_(a, 2)_U_(a, 3)_U_(a, 4)_U_(a, 5)_U_(a, 6)_U_(a, 7) \
|
|
_U_(a, 8)_U_(a, 9)_U_(a,10)_U_(a,11)_U_(a,12)_U_(a,13)_U_(a,14)_U_(a,15) \
|
|
16)
|
|
|
|
#endif /* SYM_MISC_H */
|