Adding upstream version 5.10.209.upstream/5.10.209

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 177 insertions, 0 deletions

diff --git a/drivers/scsi/sym53c8xx_2/sym_misc.h b/drivers/scsi/sym53c8xx_2/sym_misc.h
new file mode 100644
index 000000000..ef419b7ec
--- /dev/null
+++ b/drivers/scsi/sym53c8xx_2/sym_misc.h
@@ -0,0 +1,177 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * 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>
+ *
+ *-----------------------------------------------------------------------------
+ */
+
+#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 */