1 files changed, 61 insertions, 0 deletions
diff --git a/sound/pci/ctxfi/ctvmem.h b/sound/pci/ctxfi/ctvmem.h
new file mode 100644
index 0000000..01e4fd0
--- /dev/null
+++ b/sound/pci/ctxfi/ctvmem.h
@@ -0,0 +1,61 @@
+/**
+ * Copyright (C) 2008, Creative Technology Ltd. All Rights Reserved.
+ *
+ * This source file is released under GPL v2 license (no other versions).
+ * See the COPYING file included in the main directory of this source
+ * distribution for the license terms and conditions.
+ *
+ * @File    ctvmem.h
+ *
+ * @Brief
+ * This file contains the definition of virtual memory management object
+ * for card device.
+ *
+ * @Author Liu Chun
+ * @Date Mar 28 2008
+ */
+
+#ifndef CTVMEM_H
+#define CTVMEM_H
+
+#define CT_PTP_NUM	1	/* num of device page table pages */
+
+#include <linux/mutex.h>
+#include <linux/list.h>
+
+/* The chip can handle the page table of 4k pages
+ * (emu20k1 can handle even 8k pages, but we don't use it right now)
+ */
+#define CT_PAGE_SIZE	4096
+#define CT_PAGE_SHIFT	12
+#define CT_PAGE_MASK	(~(PAGE_SIZE - 1))
+#define CT_PAGE_ALIGN(addr)	ALIGN(addr, CT_PAGE_SIZE)
+
+struct ct_vm_block {
+	unsigned int addr;	/* starting logical addr of this block */
+	unsigned int size;	/* size of this device virtual mem block */
+	struct list_head list;
+};
+
+struct snd_pcm_substream;
+
+/* Virtual memory management object for card device */
+struct ct_vm {
+	void *ptp[CT_PTP_NUM];		/* Device page table pages */
+	unsigned int size;		/* Available addr space in bytes */
+	struct list_head unused;	/* List of unused blocks */
+	struct list_head used;		/* List of used blocks */
+	struct mutex lock;
+
+	/* Map host addr (kmalloced/vmalloced) to device logical addr. */
+	struct ct_vm_block *(*map)(struct ct_vm *, struct snd_pcm_substream *,
+				   int size);
+	/* Unmap device logical addr area. */
+	void (*unmap)(struct ct_vm *, struct ct_vm_block *block);
+	void *(*get_ptp_virt)(struct ct_vm *vm, int index);
+};
+
+int ct_vm_create(struct ct_vm **rvm);
+void ct_vm_destroy(struct ct_vm *vm);
+
+#endif /* CTVMEM_H */