Atheros AR600x driver + build glue

chromeos/drivers/ath6kl/os/linux/netbuf.c

+
+/*
+ * 
+ * Copyright (c) 2004-2007 Atheros Communications Inc.
+ * All rights reserved.
+ *
+ * 
+// This program is free software; you can redistribute it and/or modify
+// it under the terms of the GNU General Public License version 2 as
+// published by the Free Software Foundation;
+//
+// Software distributed under the License is distributed on an "AS
+// IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
+// implied. See the License for the specific language governing
+// rights and limitations under the License.
+//
+//
+ * 
+ */
+#include <linux/kernel.h>
+#include <linux/skbuff.h>
+#include <a_config.h>
+#include "athdefs.h"
+#include "a_types.h"
+#include "a_osapi.h"
+#include "htc_packet.h"
+
+#define AR6000_DATA_OFFSET    64
+
+void a_netbuf_enqueue(A_NETBUF_QUEUE_T *q, void *pkt)
+{
+    skb_queue_tail((struct sk_buff_head *) q, (struct sk_buff *) pkt);
+}
+
+void a_netbuf_prequeue(A_NETBUF_QUEUE_T *q, void *pkt)
+{
+    skb_queue_head((struct sk_buff_head *) q, (struct sk_buff *) pkt);
+}
+
+void *a_netbuf_dequeue(A_NETBUF_QUEUE_T *q)
+{
+    return((void *) skb_dequeue((struct sk_buff_head *) q));
+}
+
+int a_netbuf_queue_size(A_NETBUF_QUEUE_T *q)
+{
+    return(skb_queue_len((struct sk_buff_head *) q));
+}
+
+int a_netbuf_queue_empty(A_NETBUF_QUEUE_T *q)
+{
+    return(skb_queue_empty((struct sk_buff_head *) q));
+}
+
+void a_netbuf_queue_init(A_NETBUF_QUEUE_T *q)
+{
+    skb_queue_head_init((struct sk_buff_head *) q);
+}
+
+void *
+a_netbuf_alloc(int size)
+{
+    struct sk_buff *skb;
+    size += 2 * (A_GET_CACHE_LINE_BYTES()); /* add some cacheline space at front and back of buffer */
+    skb = dev_alloc_skb(AR6000_DATA_OFFSET + sizeof(HTC_PACKET) + size);
+    skb_reserve(skb, AR6000_DATA_OFFSET + sizeof(HTC_PACKET) + A_GET_CACHE_LINE_BYTES());    
+    return ((void *)skb);
+}
+
+/*
+ * Allocate an SKB w.o. any encapsulation requirement.
+ */
+void *
+a_netbuf_alloc_raw(int size)
+{
+    struct sk_buff *skb;
+
+    skb = dev_alloc_skb(size);
+
+    return ((void *)skb);
+}
+
+void
+a_netbuf_free(void *bufPtr)
+{
+    struct sk_buff *skb = (struct sk_buff *)bufPtr;
+
+    dev_kfree_skb(skb);
+}
+
+A_UINT32
+a_netbuf_to_len(void *bufPtr)
+{
+    return (((struct sk_buff *)bufPtr)->len);
+}
+
+void *
+a_netbuf_to_data(void *bufPtr)
+{
+    return (((struct sk_buff *)bufPtr)->data);
+}
+
+/*
+ * Add len # of bytes to the beginning of the network buffer
+ * pointed to by bufPtr
+ */
+A_STATUS
+a_netbuf_push(void *bufPtr, A_INT32 len)
+{
+    skb_push((struct sk_buff *)bufPtr, len);
+
+    return A_OK;
+}
+
+/*
+ * Add len # of bytes to the beginning of the network buffer
+ * pointed to by bufPtr and also fill with data
+ */
+A_STATUS
+a_netbuf_push_data(void *bufPtr, char *srcPtr, A_INT32 len)
+{
+    skb_push((struct sk_buff *) bufPtr, len);
+    A_MEMCPY(((struct sk_buff *)bufPtr)->data, srcPtr, len);
+
+    return A_OK;
+}
+
+/*
+ * Add len # of bytes to the end of the network buffer
+ * pointed to by bufPtr
+ */
+A_STATUS
+a_netbuf_put(void *bufPtr, A_INT32 len)
+{
+    skb_put((struct sk_buff *)bufPtr, len);
+
+    return A_OK;
+}
+
+/*
+ * Add len # of bytes to the end of the network buffer
+ * pointed to by bufPtr and also fill with data
+ */
+A_STATUS
+a_netbuf_put_data(void *bufPtr, char *srcPtr, A_INT32 len)
+{
+    char *start = ((struct sk_buff *)bufPtr)->data +
+        ((struct sk_buff *)bufPtr)->len;
+    skb_put((struct sk_buff *)bufPtr, len);
+    A_MEMCPY(start, srcPtr, len);
+
+    return A_OK;
+}
+
+
+/*
+ * Trim the network buffer pointed to by bufPtr to len # of bytes 
+ */
+A_STATUS
+a_netbuf_setlen(void *bufPtr, A_INT32 len)
+{
+    skb_trim((struct sk_buff *)bufPtr, len);
+
+    return A_OK;
+}
+
+/*
+ * Chop of len # of bytes from the end of the buffer.
+ */
+A_STATUS
+a_netbuf_trim(void *bufPtr, A_INT32 len)
+{
+    skb_trim((struct sk_buff *)bufPtr, ((struct sk_buff *)bufPtr)->len - len);
+
+    return A_OK;
+}
+
+/*
+ * Chop of len # of bytes from the end of the buffer and return the data.
+ */
+A_STATUS
+a_netbuf_trim_data(void *bufPtr, char *dstPtr, A_INT32 len)
+{
+    char *start = ((struct sk_buff *)bufPtr)->data +
+        (((struct sk_buff *)bufPtr)->len - len);
+    
+    A_MEMCPY(dstPtr, start, len);
+    skb_trim((struct sk_buff *)bufPtr, ((struct sk_buff *)bufPtr)->len - len);
+
+    return A_OK;
+}
+
+
+/*
+ * Returns the number of bytes available to a a_netbuf_push()
+ */
+A_INT32
+a_netbuf_headroom(void *bufPtr)
+{
+    return (skb_headroom((struct sk_buff *)bufPtr));
+}
+
+/*
+ * Removes specified number of bytes from the beginning of the buffer
+ */
+A_STATUS
+a_netbuf_pull(void *bufPtr, A_INT32 len)
+{
+    skb_pull((struct sk_buff *)bufPtr, len);
+
+    return A_OK;
+}
+
+/*
+ * Removes specified number of bytes from the beginning of the buffer
+ * and return the data
+ */
+A_STATUS
+a_netbuf_pull_data(void *bufPtr, char *dstPtr, A_INT32 len)
+{
+    A_MEMCPY(dstPtr, ((struct sk_buff *)bufPtr)->data, len);
+    skb_pull((struct sk_buff *)bufPtr, len);
+
+    return A_OK;
+}
+
+#ifdef EXPORT_HCI_BRIDGE_INTERFACE
+EXPORT_SYMBOL(a_netbuf_to_data);
+EXPORT_SYMBOL(a_netbuf_put);
+EXPORT_SYMBOL(a_netbuf_pull);
+EXPORT_SYMBOL(a_netbuf_alloc);
+EXPORT_SYMBOL(a_netbuf_free);
+#endif