Initial implementation of IPEDMA, dummy driver for KAPTURE, start of API changes

1 files changed, 56 insertions, 0 deletions

diff --git a/dma/ipe_private.h b/dma/ipe_private.h
new file mode 100644
index 0000000..e6e70c2
--- /dev/null
+++ b/dma/ipe_private.h
@@ -0,0 +1,56 @@
+#ifndef _PCILIB_DMA_IPE_PRIVATE_H
+#define _PCILIB_DMA_IPE_PRIVATE_H
+
+#define IPEDMA_CORES			1
+#define IPEDMA_TLP_SIZE			32
+#define IPEDMA_PAGE_SIZE		4096
+#define IPEDMA_DMA_PAGES		16		/**< number of DMA pages in the ring buffer to allocate */
+#define IPEDMA_DMA_PROGRESS_THRESHOLD	1		/**< how many pages the DMA engine should fill before reporting progress */
+#define IPEDMA_DESCRIPTOR_SIZE		128
+#define IPEDMA_DESCRIPTOR_ALIGNMENT	64
+
+//#define IPEDMA_DEBUG
+#define IPEDMA_BUG_DMARD				/**< No register read during DMA transfer */
+
+#define IPEDMA_REG_RESET		0x00
+#define IPEDMA_REG_CONTROL		0x04
+#define IPEDMA_REG_TLP_SIZE		0x0C
+#define IPEDMA_REG_TLP_COUNT		0x10
+#define IPEDMA_REG_PAGE_ADDR		0x50
+#define IPEDMA_REG_UPDATE_ADDR		0x54
+#define IPEDMA_REG_LAST_READ		0x58
+#define IPEDMA_REG_PAGE_COUNT		0x5C
+#define IPEDMA_REG_UPDATE_THRESHOLD	0x60
+
+
+
+typedef struct ipe_dma_s ipe_dma_t;
+
+struct ipe_dma_s {
+    struct pcilib_dma_context_s dmactx;
+    pcilib_dma_engine_description_t engine[2];
+
+    pcilib_t *pcilib;
+    
+    pcilib_register_bank_description_t *dma_bank;
+    char *base_addr;
+
+    pcilib_irq_type_t irq_enabled;	/**< indicates that IRQs are enabled */
+    pcilib_irq_type_t irq_preserve;	/**< indicates that IRQs should not be disabled during clean-up */
+    int irq_started;			/**< indicates that IRQ subsystem is initialized (detecting which types should be preserverd) */    
+
+    int started;			/**< indicates that DMA buffers are initialized and reading is allowed */
+    int writting;			/**< indicates that we are in middle of writting packet */
+    int reused;				/**< indicates that DMA was found intialized, buffers were reused, and no additional initialization is needed */
+    int preserve;			/**< indicates that DMA should not be stopped during clean-up */
+    int mode64;				/**< indicates 64-bit operation mode */
+
+    pcilib_kmem_handle_t *desc;		/**< in-memory status descriptor written by DMA engine upon operation progess */
+    pcilib_kmem_handle_t *pages;	/**< collection of memory-locked pages for DMA operation */
+
+    size_t ring_size, page_size;
+    size_t last_read, last_read_addr, last_written;
+
+};
+
+#endif /* _PCILIB_DMA_IPE_PRIVATE_H */