patch-2.1.37 linux/drivers/isdn/teles/buffers.c

• Lines: 327
• Date: Wed Dec 31 16:00:00 1969
• Orig file: v2.1.36/linux/drivers/isdn/teles/buffers.c
• Orig date: Sat Jun 1 01:56:51 1996

diff -u --recursive --new-file v2.1.36/linux/drivers/isdn/teles/buffers.c linux/drivers/isdn/teles/buffers.c
@@ -1,326 +0,0 @@
-/* $Id: buffers.c,v 1.3 1996/05/31 00:56:53 fritz Exp $
- *
- * $Log: buffers.c,v $
- * Revision 1.3  1996/05/31 00:56:53  fritz
- * removed cli() from BufPoolAdd, since it is called
- * with interrupts off anyway.
- *
- * Revision 1.2  1996/04/29 22:48:14  fritz
- * Removed compatibility-macros. No longer needed.
- *
- * Revision 1.1  1996/04/13 10:19:28  fritz
- * Initial revision
- *
- *
- */
-#define __NO_VERSION__
-#include "teles.h"
-#include <linux/mm.h>
-#include <linux/malloc.h>
-
-
-void
-BufPoolInit(struct BufPool *bp, int order, int bpps,
-	    int maxpages)
-{
-#ifdef DEBUG_MAGIC
-	generateerror
-	    bp->magic = 010167;
-#endif
-
-#if 0
-	printk(KERN_DEBUG "BufPoolInit bp %x\n", bp);
-#endif
-
-	bp->freelist = NULL;
-	bp->pageslist = NULL;
-	bp->pageorder = order;
-	bp->pagescount = 0;
-	bp->bpps = bpps;
-	bp->bufsize = BUFFER_SIZE(order, bpps);
-	bp->maxpages = maxpages;
-}
-
-int
-BufPoolAdd(struct BufPool *bp, int priority)
-{
-	struct Pages   *ptr;
-	byte           *bptr;
-	int             i;
-	struct BufHeader *bh = NULL, *prev, *first;
-
-#if 0
-	printk(KERN_DEBUG "BufPoolAdd bp %x\n", bp);
-#endif
-
-	ptr = (struct Pages *) __get_free_pages(priority, bp->pageorder, 0);
-	if (!ptr) {
-		printk(KERN_WARNING "BufPoolAdd couldn't get pages!\n");
-		return (-1);
-	}
-#if 0
-	printk(KERN_DEBUG "Order %d pages allocated at %x\n", bp->pageorder, ptr);
-#endif
-
-	ptr->next = bp->pageslist;
-	bp->pageslist = ptr;
-	bp->pagescount++;
-
-	bptr = (byte *) ptr + sizeof(struct Pages *);
-
-	i = bp->bpps;
-	first = (struct BufHeader *) bptr;
-	prev = NULL;
-	while (i--) {
-		bh = (struct BufHeader *) bptr;
-#ifdef DEBUG_MAGIC
-		bh->magic = 020167;
-#endif
-		bh->next = prev;
-		prev = bh;
-		bh->bp = bp;
-		bptr += PART_SIZE(bp->pageorder, bp->bpps);
-	}
-
-	first->next = bp->freelist;
-	bp->freelist = bh;
-	return (0);
-}
-
-void
-BufPoolFree(struct BufPool *bp)
-{
-	struct Pages   *p;
-
-#if 0
-	printk(KERN_DEBUG "BufPoolFree bp %x\n", bp);
-#endif
-
-	while (bp->pagescount--) {
-		p = bp->pageslist->next;
-		free_pages((unsigned long) bp->pageslist, bp->pageorder);
-#if 0
-		printk(KERN_DEBUG "Free pages %x order %d\n", bp->pageslist, bp->pageorder);
-#endif
-		bp->pageslist = p;
-	}
-}
-
-int
-BufPoolGet(struct BufHeader **bh,
-	   struct BufPool *bp, int priority, void *heldby, int where)
-{
-	long            flags;
-	int             i;
-
-#ifdef DEBUG_MAGIC
-	if (bp->magic != 010167) {
-		printk(KERN_DEBUG "BufPoolGet: not a BufHeader\n");
-		return (-1);
-	}
-#endif
-
-	save_flags(flags);
-	cli();
-	i = 0;
-	while (!0) {
-		if (bp->freelist) {
-			*bh = bp->freelist;
-			bp->freelist = bp->freelist->next;
-			(*bh)->heldby = heldby;
-			(*bh)->where = where;
-			restore_flags(flags);
-			return (0);
-		}
-		if ((i == 0) && (bp->pagescount < bp->maxpages)) {
-                        if (BufPoolAdd(bp, priority)) {
-                                restore_flags(flags);
-                                return -1;
-                        }
-			i++;
-		} else {
-			*bh = NULL;
-			restore_flags(flags);
-			return (-1);
-		}
-	}
-
-}
-
-void
-BufPoolRelease(struct BufHeader *bh)
-{
-	struct BufPool *bp;
-	long            flags;
-
-#ifdef DEBUG_MAGIC
-	if (bh->magic != 020167) {
-		printk(KERN_DEBUG "BufPoolRelease: not a BufHeader\n");
-		printk(KERN_DEBUG "called from %x\n", __builtin_return_address(0));
-		return;
-	}
-#endif
-
-	bp = bh->bp;
-
-#ifdef DEBUG_MAGIC
-	if (bp->magic != 010167) {
-		printk(KERN_DEBUG "BufPoolRelease: not a BufPool\n");
-		return;
-	}
-#endif
-
-	save_flags(flags);
-	cli();
-	bh->next = bp->freelist;
-	bp->freelist = bh;
-	restore_flags(flags);
-}
-
-void
-BufQueueLink(struct BufQueue *bq,
-	     struct BufHeader *bh)
-{
-	unsigned long   flags;
-
-	save_flags(flags);
-	cli();
-	if (!bq->head)
-		bq->head = bh;
-	if (bq->tail)
-		bq->tail->next = bh;
-	bq->tail = bh;
-	bh->next = NULL;
-	restore_flags(flags);
-}
-
-void
-BufQueueLinkFront(struct BufQueue *bq,
-		  struct BufHeader *bh)
-{
-	unsigned long   flags;
-
-	save_flags(flags);
-	cli();
-	bh->next = bq->head;
-	bq->head = bh;
-	if (!bq->tail)
-		bq->tail = bh;
-	restore_flags(flags);
-}
-
-int
-BufQueueUnlink(struct BufHeader **bh, struct BufQueue *bq)
-{
-	long            flags;
-
-	save_flags(flags);
-	cli();
-
-	if (bq->head) {
-		if (bq->tail == bq->head)
-			bq->tail = NULL;
-		*bh = bq->head;
-		bq->head = (*bh)->next;
-		restore_flags(flags);
-		return (0);
-	} else {
-		restore_flags(flags);
-		return (-1);
-	}
-}
-
-void
-BufQueueInit(struct BufQueue *bq)
-{
-#ifdef DEBUG_MAGIC
-	bq->magic = 030167;
-#endif
-	bq->head = NULL;
-	bq->tail = NULL;
-}
-
-void
-BufQueueRelease(struct BufQueue *bq)
-{
-	struct BufHeader *bh;
-
-	while (bq->head) {
-		BufQueueUnlink(&bh, bq);
-		BufPoolRelease(bh);
-	}
-}
-
-int
-BufQueueLength(struct BufQueue *bq)
-{
-	int             i = 0;
-	struct BufHeader *bh;
-
-	bh = bq->head;
-	while (bh) {
-		i++;
-		bh = bh->next;
-	}
-	return (i);
-}
-
-void
-BufQueueDiscard(struct BufQueue *q, int pr, void *heldby,
-		int releasetoo)
-{
-	long            flags;
-	struct BufHeader *sp;
-
-	save_flags(flags);
-	cli();
-
-	while (!0) {
-		sp = q->head;
-		if (!sp)
-			break;
-		if ((sp->primitive == pr) && (sp->heldby == heldby)) {
-			q->head = sp->next;
-			if (q->tail == sp)
-				q->tail = NULL;
-			if (releasetoo)
-				BufPoolRelease(sp);
-		} else
-			break;
-	}
-
-	sp = q->head;
-	if (sp)
-		while (sp->next) {
-			if ((sp->next->primitive == pr) && (sp->next->heldby == heldby)) {
-				if (q->tail == sp->next)
-					q->tail = sp;
-				if (releasetoo)
-					BufPoolRelease(sp->next);
-				sp->next = sp->next->next;
-			} else
-				sp = sp->next;
-		}
-	restore_flags(flags);
-}
-
-void
-Sfree(byte * ptr)
-{
-#if 0
-	printk(KERN_DEBUG "Sfree %x\n", ptr);
-#endif
-	kfree(ptr);
-}
-
-byte           *
-Smalloc(int size, int pr, char *why)
-{
-	byte           *p;
-
-	p = (byte *) kmalloc(size, pr);
-#if 0
-	printk(KERN_DEBUG "Smalloc %s size %d res %x\n", why, size, p);
-#endif
-	return (p);
-}