staging: ozwpan: Added device state support

Added support for maintaining state and data buffering for devices
connected via the network.

Signed-off-by: Chris Kelly <ckelly@ozmodevices.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 70 insertions, 0 deletions

diff --git a/drivers/staging/ozwpan/ozeltbuf.h b/drivers/staging/ozwpan/ozeltbuf.h
new file mode 100644
index 00000000000..03c12f57b9b
--- /dev/null
+++ b/drivers/staging/ozwpan/ozeltbuf.h
@@ -0,0 +1,70 @@
+/* -----------------------------------------------------------------------------
+ * Copyright (c) 2011 Ozmo Inc
+ * Released under the GNU General Public License Version 2 (GPLv2).
+ * -----------------------------------------------------------------------------
+ */
+#ifndef _OZELTBUF_H
+#define _OZELTBUF_H
+
+#include "ozprotocol.h"
+
+/*-----------------------------------------------------------------------------
+ */
+struct oz_pd;
+typedef void (*oz_elt_callback_t)(struct oz_pd *pd, long context);
+
+struct oz_elt_stream {
+        struct list_head link;
+        struct list_head elt_list;
+        atomic_t ref_count;
+        unsigned buf_count;
+        unsigned max_buf_count;
+        u8 frame_number;
+        u8 id;
+};
+
+#define OZ_MAX_ELT_PAYLOAD      255
+struct oz_elt_info {
+        struct list_head link;
+        struct list_head link_order;
+        u8 flags;
+        u8 app_id;
+        oz_elt_callback_t callback;
+        long context;
+        struct oz_elt_stream *stream;
+        u8 data[sizeof(struct oz_elt) + OZ_MAX_ELT_PAYLOAD];
+        int length;
+        unsigned magic;
+};
+/* Flags values */
+#define OZ_EI_F_MARKED          0x1
+
+struct oz_elt_buf {
+        spinlock_t lock;
+        struct list_head stream_list;
+        struct list_head order_list;
+        struct list_head isoc_list;
+        struct list_head *elt_pool;
+        int free_elts;
+        int max_free_elts;
+        u8 tx_seq_num[OZ_NB_APPS];
+};
+
+int oz_elt_buf_init(struct oz_elt_buf *buf);
+void oz_elt_buf_term(struct oz_elt_buf *buf);
+struct oz_elt_info *oz_elt_info_alloc(struct oz_elt_buf *buf);
+void oz_elt_info_free(struct oz_elt_buf *buf, struct oz_elt_info *ei);
+void oz_elt_info_free_chain(struct oz_elt_buf *buf, struct list_head *list);
+int oz_elt_stream_create(struct oz_elt_buf *buf, u8 id, int max_buf_count);
+int oz_elt_stream_delete(struct oz_elt_buf *buf, u8 id);
+void oz_elt_stream_get(struct oz_elt_stream *st);
+void oz_elt_stream_put(struct oz_elt_stream *st);
+int oz_queue_elt_info(struct oz_elt_buf *buf, u8 isoc, u8 id,
+                struct oz_elt_info *ei);
+int oz_select_elts_for_tx(struct oz_elt_buf *buf, u8 isoc, unsigned *len,
+                unsigned max_len, struct list_head *list);
+int oz_are_elts_available(struct oz_elt_buf *buf);
+void oz_trim_elt_pool(struct oz_elt_buf *buf);
+
+#endif /* _OZELTBUF_H */
+