Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / arch / sh / include / asm / dma.h

diff --git a/kernel/arch/sh/include/asm/dma.h b/kernel/arch/sh/include/asm/dma.h
new file mode 100644 (file)
index 0000000..fb6e4f7
--- /dev/null
+++ b/kernel/arch/sh/include/asm/dma.h
@@ -0,0 +1,151 @@
+/*
+ * include/asm-sh/dma.h
+ *
+ * Copyright (C) 2003, 2004  Paul Mundt
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+#ifndef __ASM_SH_DMA_H
+#define __ASM_SH_DMA_H
+#ifdef __KERNEL__
+
+#include <linux/spinlock.h>
+#include <linux/wait.h>
+#include <linux/sched.h>
+#include <linux/device.h>
+#include <asm-generic/dma.h>
+
+/*
+ * Read and write modes can mean drastically different things depending on the
+ * channel configuration. Consult your DMAC documentation and module
+ * implementation for further clues.
+ */
+#define DMA_MODE_READ          0x00
+#define DMA_MODE_WRITE         0x01
+#define DMA_MODE_MASK          0x01
+
+#define DMA_AUTOINIT           0x10
+
+/*
+ * DMAC (dma_info) flags
+ */
+enum {
+       DMAC_CHANNELS_CONFIGURED        = 0x01,
+       DMAC_CHANNELS_TEI_CAPABLE       = 0x02, /* Transfer end interrupt */
+};
+
+/*
+ * DMA channel capabilities / flags
+ */
+enum {
+       DMA_CONFIGURED                  = 0x01,
+
+       /*
+        * Transfer end interrupt, inherited from DMAC.
+        * wait_queue used in dma_wait_for_completion.
+        */
+       DMA_TEI_CAPABLE                 = 0x02,
+};
+
+extern spinlock_t dma_spin_lock;
+
+struct dma_channel;
+
+struct dma_ops {
+       int (*request)(struct dma_channel *chan);
+       void (*free)(struct dma_channel *chan);
+
+       int (*get_residue)(struct dma_channel *chan);
+       int (*xfer)(struct dma_channel *chan);
+       int (*configure)(struct dma_channel *chan, unsigned long flags);
+       int (*extend)(struct dma_channel *chan, unsigned long op, void *param);
+};
+
+struct dma_channel {
+       char dev_id[16];                /* unique name per DMAC of channel */
+
+       unsigned int chan;              /* DMAC channel number */
+       unsigned int vchan;             /* Virtual channel number */
+
+       unsigned int mode;
+       unsigned int count;
+
+       unsigned long sar;
+       unsigned long dar;
+
+       const char **caps;
+
+       unsigned long flags;
+       atomic_t busy;
+
+       wait_queue_head_t wait_queue;
+
+       struct device dev;
+       void *priv_data;
+};
+
+struct dma_info {
+       struct platform_device *pdev;
+
+       const char *name;
+       unsigned int nr_channels;
+       unsigned long flags;
+
+       struct dma_ops *ops;
+       struct dma_channel *channels;
+
+       struct list_head list;
+       int first_channel_nr;
+       int first_vchannel_nr;
+};
+
+struct dma_chan_caps {
+       int ch_num;
+       const char **caplist;
+};
+
+#define to_dma_channel(channel) container_of(channel, struct dma_channel, dev)
+
+/* arch/sh/drivers/dma/dma-api.c */
+extern int dma_xfer(unsigned int chan, unsigned long from,
+                   unsigned long to, size_t size, unsigned int mode);
+
+#define dma_write(chan, from, to, size)        \
+       dma_xfer(chan, from, to, size, DMA_MODE_WRITE)
+#define dma_write_page(chan, from, to) \
+       dma_write(chan, from, to, PAGE_SIZE)
+
+#define dma_read(chan, from, to, size) \
+       dma_xfer(chan, from, to, size, DMA_MODE_READ)
+#define dma_read_page(chan, from, to)  \
+       dma_read(chan, from, to, PAGE_SIZE)
+
+extern int request_dma_bycap(const char **dmac, const char **caps,
+                            const char *dev_id);
+extern int get_dma_residue(unsigned int chan);
+extern struct dma_info *get_dma_info(unsigned int chan);
+extern struct dma_channel *get_dma_channel(unsigned int chan);
+extern void dma_wait_for_completion(unsigned int chan);
+extern void dma_configure_channel(unsigned int chan, unsigned long flags);
+
+extern int register_dmac(struct dma_info *info);
+extern void unregister_dmac(struct dma_info *info);
+extern struct dma_info *get_dma_info_by_name(const char *dmac_name);
+
+extern int dma_extend(unsigned int chan, unsigned long op, void *param);
+extern int register_chan_caps(const char *dmac, struct dma_chan_caps *capslist);
+
+/* arch/sh/drivers/dma/dma-sysfs.c */
+extern int dma_create_sysfs_files(struct dma_channel *, struct dma_info *);
+extern void dma_remove_sysfs_files(struct dma_channel *, struct dma_info *);
+
+#ifdef CONFIG_PCI
+extern int isa_dma_bridge_buggy;
+#else
+#define isa_dma_bridge_buggy   (0)
+#endif
+
+#endif /* __KERNEL__ */
+#endif /* __ASM_SH_DMA_H */