1 files changed, 386 insertions, 0 deletions
diff --git a/drivers/net/wireless/brcm80211/brcmutil/utils.c b/drivers/net/wireless/brcm80211/brcmutil/utils.c
new file mode 100644
index 00000000000..f27c4891082
--- /dev/null
+++ b/drivers/net/wireless/brcm80211/brcmutil/utils.c
@@ -0,0 +1,386 @@
+/*
+ * Copyright (c) 2010 Broadcom Corporation
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
+ * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
+ * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
+ * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <linux/netdevice.h>
+#include <linux/module.h>
+#include <brcmu_utils.h>
+
+MODULE_AUTHOR("Broadcom Corporation");
+MODULE_DESCRIPTION("Broadcom 802.11n wireless LAN driver utilities.");
+MODULE_SUPPORTED_DEVICE("Broadcom 802.11n WLAN cards");
+MODULE_LICENSE("Dual BSD/GPL");
+
+struct sk_buff *brcmu_pkt_buf_get_skb(uint len)
+{
+	struct sk_buff *skb;
+
+	skb = dev_alloc_skb(len);
+	if (skb) {
+		skb_put(skb, len);
+		skb->priority = 0;
+	}
+
+	return skb;
+}
+EXPORT_SYMBOL(brcmu_pkt_buf_get_skb);
+
+/* Free the driver packet. Free the tag if present */
+void brcmu_pkt_buf_free_skb(struct sk_buff *skb)
+{
+	struct sk_buff *nskb;
+	int nest = 0;
+
+	/* perversion: we use skb->next to chain multi-skb packets */
+	while (skb) {
+		nskb = skb->next;
+		skb->next = NULL;
+
+		if (skb->destructor)
+			/* cannot kfree_skb() on hard IRQ (net/core/skbuff.c) if
+			 * destructor exists
+			 */
+			dev_kfree_skb_any(skb);
+		else
+			/* can free immediately (even in_irq()) if destructor
+			 * does not exist
+			 */
+			dev_kfree_skb(skb);
+
+		nest++;
+		skb = nskb;
+	}
+}
+EXPORT_SYMBOL(brcmu_pkt_buf_free_skb);
+
+
+/* copy a buffer into a pkt buffer chain */
+uint brcmu_pktfrombuf(struct sk_buff *p, uint offset, int len,
+		unsigned char *buf)
+{
+	uint n, ret = 0;
+
+	/* skip 'offset' bytes */
+	for (; p && offset; p = p->next) {
+		if (offset < (uint) (p->len))
+			break;
+		offset -= p->len;
+	}
+
+	if (!p)
+		return 0;
+
+	/* copy the data */
+	for (; p && len; p = p->next) {
+		n = min((uint) (p->len) - offset, (uint) len);
+		memcpy(p->data + offset, buf, n);
+		buf += n;
+		len -= n;
+		ret += n;
+		offset = 0;
+	}
+
+	return ret;
+}
+EXPORT_SYMBOL(brcmu_pktfrombuf);
+
+/* return total length of buffer chain */
+uint brcmu_pkttotlen(struct sk_buff *p)
+{
+	uint total;
+
+	total = 0;
+	for (; p; p = p->next)
+		total += p->len;
+	return total;
+}
+EXPORT_SYMBOL(brcmu_pkttotlen);
+
+/*
+ * osl multiple-precedence packet queue
+ * hi_prec is always >= the number of the highest non-empty precedence
+ */
+struct sk_buff *brcmu_pktq_penq(struct pktq *pq, int prec,
+				      struct sk_buff *p)
+{
+	struct pktq_prec *q;
+
+	if (pktq_full(pq) || pktq_pfull(pq, prec))
+		return NULL;
+
+	q = &pq->q[prec];
+
+	if (q->head)
+		q->tail->prev = p;
+	else
+		q->head = p;
+
+	q->tail = p;
+	q->len++;
+
+	pq->len++;
+
+	if (pq->hi_prec < prec)
+		pq->hi_prec = (u8) prec;
+
+	return p;
+}
+EXPORT_SYMBOL(brcmu_pktq_penq);
+
+struct sk_buff *brcmu_pktq_penq_head(struct pktq *pq, int prec,
+					   struct sk_buff *p)
+{
+	struct pktq_prec *q;
+
+	if (pktq_full(pq) || pktq_pfull(pq, prec))
+		return NULL;
+
+	q = &pq->q[prec];
+
+	if (q->head == NULL)
+		q->tail = p;
+
+	p->prev = q->head;
+	q->head = p;
+	q->len++;
+
+	pq->len++;
+
+	if (pq->hi_prec < prec)
+		pq->hi_prec = (u8) prec;
+
+	return p;
+}
+EXPORT_SYMBOL(brcmu_pktq_penq_head);
+
+struct sk_buff *brcmu_pktq_pdeq(struct pktq *pq, int prec)
+{
+	struct pktq_prec *q;
+	struct sk_buff *p;
+
+	q = &pq->q[prec];
+
+	p = q->head;
+	if (p == NULL)
+		return NULL;
+
+	q->head = p->prev;
+	if (q->head == NULL)
+		q->tail = NULL;
+
+	q->len--;
+
+	pq->len--;
+
+	p->prev = NULL;
+
+	return p;
+}
+EXPORT_SYMBOL(brcmu_pktq_pdeq);
+
+struct sk_buff *brcmu_pktq_pdeq_tail(struct pktq *pq, int prec)
+{
+	struct pktq_prec *q;
+	struct sk_buff *p, *prev;
+
+	q = &pq->q[prec];
+
+	p = q->head;
+	if (p == NULL)
+		return NULL;
+
+	for (prev = NULL; p != q->tail; p = p->prev)
+		prev = p;
+
+	if (prev)
+		prev->prev = NULL;
+	else
+		q->head = NULL;
+
+	q->tail = prev;
+	q->len--;
+
+	pq->len--;
+
+	return p;
+}
+EXPORT_SYMBOL(brcmu_pktq_pdeq_tail);
+
+void
+brcmu_pktq_pflush(struct pktq *pq, int prec, bool dir,
+		  bool (*fn)(struct sk_buff *, void *), void *arg)
+{
+	struct pktq_prec *q;
+	struct sk_buff *p, *prev = NULL;
+
+	q = &pq->q[prec];
+	p = q->head;
+	while (p) {
+		if (fn == NULL || (*fn) (p, arg)) {
+			bool head = (p == q->head);
+			if (head)
+				q->head = p->prev;
+			else
+				prev->prev = p->prev;
+			p->prev = NULL;
+			brcmu_pkt_buf_free_skb(p);
+			q->len--;
+			pq->len--;
+			p = (head ? q->head : prev->prev);
+		} else {
+			prev = p;
+			p = p->prev;
+		}
+	}
+
+	if (q->head == NULL)
+		q->tail = NULL;
+}
+EXPORT_SYMBOL(brcmu_pktq_pflush);
+
+void brcmu_pktq_flush(struct pktq *pq, bool dir,
+		      bool (*fn)(struct sk_buff *, void *), void *arg)
+{
+	int prec;
+	for (prec = 0; prec < pq->num_prec; prec++)
+		brcmu_pktq_pflush(pq, prec, dir, fn, arg);
+}
+EXPORT_SYMBOL(brcmu_pktq_flush);
+
+void brcmu_pktq_init(struct pktq *pq, int num_prec, int max_len)
+{
+	int prec;
+
+	/* pq is variable size; only zero out what's requested */
+	memset(pq, 0,
+	      offsetof(struct pktq, q) + (sizeof(struct pktq_prec) * num_prec));
+
+	pq->num_prec = (u16) num_prec;
+
+	pq->max = (u16) max_len;
+
+	for (prec = 0; prec < num_prec; prec++)
+		pq->q[prec].max = pq->max;
+}
+EXPORT_SYMBOL(brcmu_pktq_init);
+
+struct sk_buff *brcmu_pktq_peek_tail(struct pktq *pq, int *prec_out)
+{
+	int prec;
+
+	if (pq->len == 0)
+		return NULL;
+
+	for (prec = 0; prec < pq->hi_prec; prec++)
+		if (pq->q[prec].head)
+			break;
+
+	if (prec_out)
+		*prec_out = prec;
+
+	return pq->q[prec].tail;
+}
+EXPORT_SYMBOL(brcmu_pktq_peek_tail);
+
+/* Return sum of lengths of a specific set of precedences */
+int brcmu_pktq_mlen(struct pktq *pq, uint prec_bmp)
+{
+	int prec, len;
+
+	len = 0;
+
+	for (prec = 0; prec <= pq->hi_prec; prec++)
+		if (prec_bmp & (1 << prec))
+			len += pq->q[prec].len;
+
+	return len;
+}
+EXPORT_SYMBOL(brcmu_pktq_mlen);
+
+/* Priority dequeue from a specific set of precedences */
+struct sk_buff *brcmu_pktq_mdeq(struct pktq *pq, uint prec_bmp,
+				      int *prec_out)
+{
+	struct pktq_prec *q;
+	struct sk_buff *p;
+	int prec;
+
+	if (pq->len == 0)
+		return NULL;
+
+	while ((prec = pq->hi_prec) > 0 && pq->q[prec].head == NULL)
+		pq->hi_prec--;
+
+	while ((prec_bmp & (1 << prec)) == 0 || pq->q[prec].head == NULL)
+		if (prec-- == 0)
+			return NULL;
+
+	q = &pq->q[prec];
+
+	p = q->head;
+	if (p == NULL)
+		return NULL;
+
+	q->head = p->prev;
+	if (q->head == NULL)
+		q->tail = NULL;
+
+	q->len--;
+
+	if (prec_out)
+		*prec_out = prec;
+
+	pq->len--;
+
+	p->prev = NULL;
+
+	return p;
+}
+EXPORT_SYMBOL(brcmu_pktq_mdeq);
+
+#if defined(BCMDBG)
+/* pretty hex print a pkt buffer chain */
+void brcmu_prpkt(const char *msg, struct sk_buff *p0)
+{
+	struct sk_buff *p;
+
+	if (msg && (msg[0] != '\0'))
+		printk(KERN_DEBUG "%s:\n", msg);
+
+	for (p = p0; p; p = p->next)
+		print_hex_dump_bytes("", DUMP_PREFIX_OFFSET, p->data, p->len);
+}
+EXPORT_SYMBOL(brcmu_prpkt);
+#endif				/* defined(BCMDBG) */
+
+#if defined(BCMDBG)
+/*
+ * print bytes formatted as hex to a string. return the resulting
+ * string length
+ */
+int brcmu_format_hex(char *str, const void *bytes, int len)
+{
+	int i;
+	char *p = str;
+	const u8 *src = (const u8 *)bytes;
+
+	for (i = 0; i < len; i++) {
+		p += snprintf(p, 3, "%02X", *src);
+		src++;
+	}
+	return (int)(p - str);
+}
+EXPORT_SYMBOL(brcmu_format_hex);
+#endif				/* defined(BCMDBG) */