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-rw-r--r--include/linux/rio.h47
1 files changed, 47 insertions, 0 deletions
diff --git a/include/linux/rio.h b/include/linux/rio.h
index 4d50611..a90ebad 100644
--- a/include/linux/rio.h
+++ b/include/linux/rio.h
@@ -20,6 +20,9 @@
#include <linux/errno.h>
#include <linux/device.h>
#include <linux/rio_regs.h>
+#ifdef CONFIG_RAPIDIO_DMA_ENGINE
+#include <linux/dmaengine.h>
+#endif
#define RIO_NO_HOPCOUNT -1
#define RIO_INVALID_DESTID 0xffff
@@ -254,6 +257,9 @@ struct rio_mport {
u32 phys_efptr;
unsigned char name[40];
void *priv; /* Master port private data */
+#ifdef CONFIG_RAPIDIO_DMA_ENGINE
+ struct dma_device dma;
+#endif
};
/**
@@ -395,6 +401,47 @@ union rio_pw_msg {
u32 raw[RIO_PW_MSG_SIZE/sizeof(u32)];
};
+#ifdef CONFIG_RAPIDIO_DMA_ENGINE
+
+/**
+ * enum rio_write_type - RIO write transaction types used in DMA transfers
+ *
+ * Note: RapidIO specification defines write (NWRITE) and
+ * write-with-response (NWRITE_R) data transfer operations.
+ * Existing DMA controllers that service RapidIO may use one of these operations
+ * for entire data transfer or their combination with only the last data packet
+ * requires response.
+ */
+enum rio_write_type {
+ RDW_DEFAULT, /* default method used by DMA driver */
+ RDW_ALL_NWRITE, /* all packets use NWRITE */
+ RDW_ALL_NWRITE_R, /* all packets use NWRITE_R */
+ RDW_LAST_NWRITE_R, /* last packet uses NWRITE_R, others - NWRITE */
+};
+
+struct rio_dma_ext {
+ u16 destid;
+ u64 rio_addr; /* low 64-bits of 66-bit RapidIO address */
+ u8 rio_addr_u; /* upper 2-bits of 66-bit RapidIO address */
+ enum rio_write_type wr_type; /* preferred RIO write operation type */
+};
+
+struct rio_dma_data {
+ /* Local data (as scatterlist) */
+ struct scatterlist *sg; /* I/O scatter list */
+ unsigned int sg_len; /* size of scatter list */
+ /* Remote device address (flat buffer) */
+ u64 rio_addr; /* low 64-bits of 66-bit RapidIO address */
+ u8 rio_addr_u; /* upper 2-bits of 66-bit RapidIO address */
+ enum rio_write_type wr_type; /* preferred RIO write operation type */
+};
+
+static inline struct rio_mport *dma_to_mport(struct dma_device *ddev)
+{
+ return container_of(ddev, struct rio_mport, dma);
+}
+#endif /* CONFIG_RAPIDIO_DMA_ENGINE */
+
/* Architecture and hardware-specific functions */
extern int rio_register_mport(struct rio_mport *);
extern int rio_open_inb_mbox(struct rio_mport *, void *, int, int);
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