Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / sound / pci / ctxfi / ctvmem.h

diff --git a/kernel/sound/pci/ctxfi/ctvmem.h b/kernel/sound/pci/ctxfi/ctvmem.h
new file mode 100644 (file)
index 0000000..e6da60e
--- /dev/null
+++ b/kernel/sound/pci/ctxfi/ctvmem.h
@@ -0,0 +1,63 @@
+/**
+ * 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     4       /* num of device page table pages */
+
+#include <linux/mutex.h>
+#include <linux/list.h>
+#include <linux/pci.h>
+#include <sound/memalloc.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 {
+       struct snd_dma_buffer 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);
+       dma_addr_t (*get_ptp_phys)(struct ct_vm *vm, int index);
+};
+
+int ct_vm_create(struct ct_vm **rvm, struct pci_dev *pci);
+void ct_vm_destroy(struct ct_vm *vm);
+
+#endif /* CTVMEM_H */